Work apparatus and its system

Abstract

The present invention relates to a work device that is mounted on the arm of a work vehicle and performs cutting work and work using work tools for specific applications. The support bracket connected to the work vehicle side includes a lower bracket separate from the front work attachment, and the lower bracket side supports a cutting unit including a cutting blade, receiving part, pivot shaft and drive unit. The front work attachment, such as a bucket, rake or grapple, is detachably attached by first and second mounting pins that pass through the side plate of the lower bracket and the mounting ears on the work tool side. The cutting unit maintains its basic configuration regardless of the presence or type of front work attachment, and the main reaction force during cutting is received by the lower bracket and support bracket side. This makes it possible to achieve both the interchangeability of work tools and load support during cutting operations.

Description

Technical Field

[0001] The present invention relates to a working device mounted on an arm of a work vehicle for performing operations such as logging and excavation. More specifically, in one aspect, a lower bracket is provided at the lower part of a support bracket connected to the work vehicle side, and a cutter mechanism or a cutting unit is aggregated and supported on the lower bracket side, and work tools for different uses such as a bucket, a grapple, and a rake can be detachably mounted by two mounting pins. A working device and its system are described. One aspect of the present invention may include a lower bracket, an exchange structure by two pins, a cutter structure independent of a work tool, and a load transmission structure that receives a cutting reaction force on the lower bracket side, such as those found in the FGB-50M as an implementation product. However, the present invention is not limited to a specific product name, dimensions, color, manufacturing process, or appearance design.

Background Art

[0002] Conventionally, a technique of using a combination of attachments such as a bucket, a grapple, and a rake mounted on an arm of a work vehicle and a cutting tool or a cutting mechanism has been known. For example, Patent Document 1 discloses a configuration in which a cutting tool and a non-cutting work tool are attached to an arm of a work vehicle. In this type of configuration, depending on the arrangement relationship of the cutting tool, the work tool, the connecting member, the receiving portion, and the drive system, there may be room for improvement in the workability of replacing the attachment, the way of receiving the cutting reaction force, the independence of the cutting mechanism, or the maintainability.

[0003] Furthermore, depending on the connection structure or the hydraulic piping structure between the cutting unit and the work attachment, when replacing the attachment, it may be necessary to check the connection of the hydraulic piping, suppress the entry of foreign matter into the hydraulic oil, arrange the piping route, or manage the pressure fluctuation. In particular, in a configuration where the hydraulic oil supplied to the cutting unit and the hydraulic oil supplied to the work attachment pass through the same or adjacent piping routes or valve blocks, depending on the operating conditions, the pressure fluctuation during the operation of one may affect the operating stability of the other.

Prior Art Documents

Patent Documents

[0004] [Patent Document 1] US2009 / 0229433A1 [Overview of the project] [Problems that the invention aims to solve]

[0005] In conventional work equipment, depending on the arrangement of the cutting tool, work implement, connecting member, support part, and drive system, the cutting reaction force generated during the cutting operation is easily transmitted to the front work attachment side or the surrounding connecting structure, which may result in insufficient durability, ease of replacement, maintainability, or stability of the cutting operation. Furthermore, in configurations where a cutting mechanism or its support structure is individually provided for each work implement, it may be necessary to adjust the design of the support, hydraulic piping, support part, or load transmission part of the cutting mechanism for each work implement each time a bucket, grapple, rake, etc., is replaced according to its application. One aspect of the present invention focuses on making it easier to achieve both work implement replaceability and load support during cutting by using the lower bracket side, rather than the work implement side, as the common support base for the cutting mechanism. However, the problems that the present invention can solve are not limited to problems caused solely by specific prior art, but include one or more problems that may arise depending on the work object, the type of front work attachment attached, the type of work vehicle, and the operating environment.

[0006] Furthermore, if the structural or functional independence of the cutting unit and the forward work attachment is insufficient, cutting operations with the forward work attachment removed, replacement with a different forward work attachment, or maintenance and replacement of the cutting unit may become complicated. One aspect of the present invention provides a configuration in which a cutting unit, independently supported or aggregated on the support bracket side or the common base unit side, particularly on the lower bracket side, can be fitted with a bucket, rake, grapple, or other application-specific forward work attachment by means of a first mounting pin and a second mounting pin that penetrate a pair of side plates of the lower bracket and the mounting ears on the work tool side. One example of the problem to be addressed is to make it easier to maintain the basic configuration, pivot relationship, receiving part, hydraulic piping, or load transmission path of the cutting unit, regardless of the presence or type of forward work attachment. It should be noted that it is not always necessary to solve all of these problems simultaneously, and each aspect of the present invention may solve only some of the above problems. [Means for solving the problem]

[0007] A working device according to one aspect of the present invention comprises a support bracket connected to the arm of a work vehicle, a cutting unit supported by the support bracket and having a cutting blade and a receiving portion that can face the cutting blade, and a forward working attachment detachably or interchangeably mounted to the support bracket. In at least one embodiment, the support bracket includes a lower bracket separate from the forward working attachment. The lower bracket may include a pair of side plates, a first pin insertion hole and a second pin insertion hole provided in the side plates, and cylindrical bosses, reinforcing collars, spacers or ribs provided around these. The forward working attachment has mounting ears corresponding to these pin insertion holes and is detachably connected to the lower bracket via a first mounting pin and a second mounting pin. The cutting unit is supported laterally, below, or inside the lower bracket and, in at least one embodiment, independently of the bucket body, bucket side plates or bucket claws, comprises a pivot shaft, a cutting blade, a receiving portion, a drive cylinder, a drive link and at least a portion of hydraulic piping. The cutting unit is configured to operate even when the front work attachment is not attached, and the primary cutting reaction force generated by the cutting blade is supported so that it is received by the lower bracket and support bracket side, without passing through the front work attachment as the primary load transmission member. This makes it possible to achieve both interchangeability depending on the attached state or type of attachment and stability of the cutting operation. [Effects of the Invention]

[0008] According to at least one aspect of the present invention, the cutting unit, receiving portion, pivot shaft, or at least a portion of the hydraulic piping can be integrated into the lower bracket side, and the forward work attachment such as a bucket and the lower bracket can be detachably connected by a first mounting pin and a second mounting pin. Therefore, regardless of the presence or type of forward work attachment, the main load transmission path during cutting can be easily formed on the receiving portion, the pivot support portion of the cutting blade, the side plate or boss portion of the lower bracket, and the support bracket side. This reduces the need to provide a cutting mechanism for each work tool while only changing the work tool according to the application, and can improve at least one of the durability, replaceability, maintainability, or versatility of the device. Furthermore, since the cutting unit can function independently even when the forward work attachment is removed, it is not limited to a configuration in which the cutting mechanism is pivotally supported at the base end of the bucket opening or a configuration in which the cutting blade rotates along the side wall of the bucket, and it is easy to secure design freedom with the lower bracket as a common base.

[0009] Furthermore, in configurations in which the control system, self-diagnostic function, attachment recognition mechanism, safety monitoring mechanism, or maintenance management mechanism described later are arbitrarily combined, hydraulic control parameters, operating permission conditions, display information, or protective actions can be adjusted according to the type or mounting state of the forward work attachment. This can suppress hydraulic energy consumption, overload, blade wear, malfunction, or the burden of maintenance work. These effects are illustrative, and the effects achieved in individual embodiments may vary depending on the device configuration and operating conditions. [Brief explanation of the drawing]

[0010] [Figure 1] This is a side view showing the overall configuration of a work device equipped with a bucket as a forward work attachment. [Figure 2] This is a side view showing the overall configuration of a work device equipped with a rake as a front work attachment. [Figure 3] This is a side view showing the overall configuration of a work device equipped with a grapple as a forward work attachment. [Figure 4]This is a perspective view showing the common base unit, consisting of a support bracket and a cutting unit, with the front work attachment removed. [Figure 5] This is an exploded perspective view showing the forward work attachment separated from the common base unit. [Figure 6] This is an enlarged side view showing the mounting section of the front work attachment and the surrounding structure of the two pins. [Figure 7] This is an enlarged side view showing the configuration of multiple cutting edges in the cutting blade of a cutting unit. [Figure 8] This is an operation diagram illustrating the cutting operation by the cutting unit in stages. [Figure 9] This is a schematic diagram showing the load transmission path in which the main cutting reaction force is transmitted through the support bracket side during the operation of the cutting unit. [Figure 10] This is a rear view showing the piping configuration where the hydraulic piping connection points are concentrated on the support bracket side. [Figure 11] This is a perspective view showing the bucket and lower bracket separated, with the bucket acting as the forward work attachment. [Figure 12] This is an enlarged view showing the positional relationship between the side plate of the lower bracket, the mounting tab on the bucket side, and the two mounting pins. [Figure 13] This is a schematic cross-sectional view showing a configuration in which a gap is provided between the lower bracket and the bucket body, and the two are not fixed together by welding or the like. [Figure 14] This diagram shows the lower bracket and cutting unit remaining on the common base unit side with the front work attachment removed. [Figure 15] This is a schematic diagram illustrating the replacement procedure for attaching and detaching the bucket from the lower bracket using the first and second mounting pins. [Figure 16] This schematic diagram illustrates how the primary cutting reaction force generated in the cutting blade and receiving section is transmitted primarily through the lower bracket and support bracket, rather than through the bucket body. [Figure 17]It is a schematic diagram showing a replaceable working tool system for selectively replacing and mounting a bucket, a grapple, and a rake on a common mother unit that aggregates a cutting mechanism on the lower bracket side. [Figure 18] It is a schematic diagram showing a state in which at least a part of a cutting unit, a receiving part, and a hydraulic pipe remain on the lower bracket alone or on the common mother unit side. [Figure 19] It is a schematic diagram showing an example in which a common mounting ear part is provided on each working tool unit of a bucket, a grapple, and a rake to be replaced. [Figure 20] It is a schematic diagram showing details of a connection part that connects a side plate on the lower bracket side and a mounting ear part on the working tool side with two mounting pins. [Figure 21] It is a schematic diagram showing a mode in which a plurality of types of working tools are prepared as a kit or a replacement candidate group for the same base. [Figure 22] It is a schematic diagram showing a mode in which the basic configuration and support relationship of the same cutting unit are maintained even after the working tool is replaced. [Figure 23] In one embodiment corresponding to the completed machine, it is a side schematic diagram showing the positional relationship of a lower bracket, a bucket, a two-pin mounting part, and a cutter mechanism arranged on the side. [Figure 24] It is an enlarged schematic diagram showing a two-pin mounting structure that connects a pair of side plates of a lower bracket and a mounting ear part on the working tool side with a first mounting pin and a second mounting pin. [Figure 25] It is a side schematic diagram explaining an independent cutter structure aggregated on the lower bracket side with the bucket shown by a broken line. [Figure 26] It is a schematic diagram showing a load transmission path in which the main cutting reaction acting on the cutting object is transmitted to the receiving part, the rotating shaft, the lower bracket, and the support bracket side instead of the bucket body. [Figure 27] It is a schematic diagram showing a mode in which a hydraulic valve block, a hydraulic pipe, and a hose guide for a cutting unit are arranged on the common mother unit side. [Figure 28] It is a schematic diagram showing step by step the operation in which the workpiece to be cut is captured and cut between the cutting blade and the receiving part in the state where the bucket is mounted. [Figure 29] This is a first perspective view showing the rake separated from the common matrix unit. [Figure 30] This is a second perspective view showing the rake separated from the common matrix unit. [Figure 31] This is a one-way perspective view of a work device with a rake attached to the lower bracket. [Figure 32] This is a perspective view from another direction of the work device with the rake attached to the lower bracket. [Figure 33] This is a perspective view of the rake alone, taken from one direction. [Figure 34] This is a perspective view of the rake from another direction. [Modes for carrying out the invention]

[0011] The overall configuration of the work device 10 will be described below.

[0012] Figure 1 shows a side view of the work apparatus 10 according to this embodiment.

[0013] The work device 10 is a device that is attached to the front arm of a work vehicle and used for that purpose.

[0014] The work device 10 is used in a variety of work environments, such as civil engineering and forestry.

[0015] The support bracket 20 is attached to the tip of the boom or arm of a work vehicle (e.g., a backhoe, hydraulic excavator, wheel loader, etc.). The support bracket 20 may include an upper vehicle connection or slewing section 98 and a lower bracket 21 provided below the vehicle connection or slewing section 98. The lower bracket 21 may include side plates 21A, 21B spaced apart in the left-right or widthwise direction, first pin insertion holes 24 and second pin insertion holes 25 provided in these side plates, pin bosses 22 provided around these, and at least a portion of a pivot, receiving section 34, reinforcing rib 100 or hydraulic piping 80 for supporting the cutting unit 30. In at least one embodiment, the work device 10 is configured as a new type of work device implemented under a model name such as FGB-50M, and is not merely a change in dimensions or appearance from a conventional machine, but has a structure in which the cutter mechanism is concentrated on the lower bracket 21 side and work tools such as the bucket 40, grapple 60, and rake 50 can be replaced using a two-pin system.

[0016] The work device 10 is constructed with a support bracket 20 as its base.

[0017] The support bracket 20 is a component that is connected to the arm of the work vehicle.

[0018] The support bracket 20 is formed from a steel member or the like that has high rigidity.

[0019] A cutting unit 30 is attached to the support bracket 20.

[0020] The cutting unit 30 is a mechanism for cutting an object.

[0021] The support bracket 20 and the cutting unit 30 form the basic layout.

[0022] The support bracket 20 can function as an anchor member to receive the reaction force during cutting. For example, the main frame of the support bracket 20 can be formed by a box structure, a cast steel structure, a forged structure, or a combination thereof, by welding high-tensile steel plates together in a box shape. A lower bracket 21, separate from the forward work attachments such as the bucket 40, grapple 60, and rake 50, can be provided at the bottom of the support bracket 20. In one embodiment corresponding to the actual product, the lower bracket 21 includes thick plate-shaped side plates 21A, 21B, two mounting pins 71, 72 passing through them, a cylindrical pin boss portion 22 or reinforcing collar that supports the mounting pins, and a bearing portion that supports the pivot axis Ax or receiving portion 34 of the cutting unit 30. A gap 26 or clearance portion may be provided between the lower bracket 21 and the work tool such as the bucket 40, and by not integrally fixing the work tool body to the lower bracket 21 by welding or the like, only the work tool can be removed while maintaining the support relationship of the cutting unit 30 when changing the work tool. Furthermore, reinforcing ribs 100 may be placed on the inside or outside of the support bracket 20 to alleviate stress concentration when the cutting unit 30 is driven.

[0023] This basic layout is explained in detail below.

[0024] The cutting unit 30 is supported by the support bracket 20.

[0025] The cutting unit 30 has a rotatable cutting blade 32.

[0026] The cutting blade 32 is driven to rotate by a drive source such as a hydraulic cylinder.

[0027] The cutting unit 30 further includes a receiving portion 34.

[0028] The receiving portion 34 is positioned opposite the cutting blade 32.

[0029] The cutting blade 32 and the receiving part 34 work together in cooperation with each other.

[0030] The cutting blade 32 rotates, gripping the object between itself and the receiving part 34.

[0031] This clamping motion cuts the object.

[0032] The cutting unit 30 has the ability to shear objects to be felled, such as trees.

[0033] A high-hardness bushing (bearing component) is press-fitted into the rotating shaft Ax of the cutting blade 32 to extend its lifespan and reduce frictional resistance. Furthermore, a dust seal is provided around the rotating shaft Ax to prevent the intrusion of soil, wood chips, moisture, etc., that occur in harsh outdoor working environments. This allows for a longer interval between periodic greasing, resulting in a structure with excellent maintainability.

[0034] The work device 10 is configured to be able to attach a front work attachment. The front work attachment is detachably attached to the support bracket 20, particularly its lower bracket 21 or common mounting portion. In the embodiments shown in Figures 11 to 13 and Figures 23 to 24, the mounting ears 27 of the bucket 40 are positioned between or near the side plates 21A and 21B of the lower bracket 21. The bucket 40 and the lower bracket 21 are connected by inserting the first mounting pin 71 and the second mounting pin 72 into the first pin insertion holes 24 and the second pin insertion holes 25 of the side plates 21A and 21B and the corresponding holes of the mounting ears 27. On the other hand, the bucket 40 can be separated from the lower bracket 21 by removing or releasing the mounting pins 71 and 72.

[0035] In Figure 1, a bucket 40 is mounted as a forward work attachment. The bucket 40 is an attachment used for excavating and transporting soil and sand, and is positioned in front of or below the support bracket 20. In one embodiment corresponding to the actual product, the bucket 40 comprises a bucket body 41, bucket side plates 42, bucket claws 43, mounting ears 27 on the rear or upper side, and reinforcing ribs. The bucket 40 is not only configured separately from the cutting unit 30, but in at least one embodiment it is not integrally fixed to the lower bracket 21 by welding or the like, but is detachably connected via mounting pins 71 and 72. As a result, even if the bucket 40 is removed, at least a portion of the lower bracket 21, cutting unit 30, cutting blade 32, receiving part 34, drive cylinder 38, and hydraulic piping 80 remain on the common base unit 12 side.

[0036] Next, another configuration example will be described with reference to Figures 2, 21, and 29-34. Figure 2 shows an example in which a rake 50 is attached as a front work attachment. The rake 50 is an attachment with multiple claws used for collecting grass, leveling the ground, etc. The rake 50 may be in the form of a manufactured actual machine, or it may be in the form of a development model shown as 3D design data or a conceptual drawing. In either case, the rake 50 can be attached to the lower bracket 21 using the same or compatible mounting method as the bucket 40 and grapple 60.

[0037] The rake 50 is also positioned in front of the support bracket 20 and is configured separately from the cutting unit 30, and is detachable from the support bracket 20.

[0038] Furthermore, different configuration examples will be explained with reference to Figures 3 and 20. Figure 3 shows an example in which a grapple 60 is attached as a front work attachment. The grapple 60 is an attachment that has an arm for gripping an object and is used for gripping work, etc. Since the grapple 60 can also be detachably connected to the lower bracket 21 via mounting pins 71 and 72, the basic configuration and support relationship of the cutting unit 30 can be easily maintained even after changing the work tool from the bucket 40 to the grapple 60.

[0039] The grapple 60 is positioned in front of the support bracket 20 and is configured separately from the cutting unit 30, and is detachable from the support bracket 20.

[0040] As described above, there are several types of forward work attachments (see Figures 1 to 3).

[0041] Bucket 40, rake 50, and grapple 60 are typical examples.

[0042] These attachments are selected according to the purpose of the work.

[0043] The selected attachment is mounted on the support bracket 20.

[0044] The work device 10 is used by appropriately changing these attachments.

[0045] To enable rapid replacement of the front work attachment, a quick-attach mechanism (not shown) that is manually or hydraulically driven to lock can be provided at the tip of the support bracket 20 or the lower bracket 21. The mounting pins 71 and 72 may be solid pins, cylindrical pins, locking pins, hydraulic locking pins, retaining members 73, or pins having nuts 74. In one embodiment corresponding to the actual product, the mounting pins 71 and 72 are positioned to pass through the side plates 21A and 21B of the lower bracket 21 and clamp the mounting ears 27 on the work tool side. This reduces the need to disassemble the rotating shaft Ax of the cutter mechanism, the receiving part 34, and the hydraulic piping 80 even when the work tool is removed. If a hydraulic quick-attach mechanism is adopted, the front work attachment can be locked and unlocked by operation only from the driver's seat, thereby reducing the need for the worker to descend from the vehicle and improving safety.

[0046] Here, we will explain the concept of the common parent unit 12.

[0047] Figure 4 shows a perspective view of the common base unit 12.

[0048] The common base unit 12 is configured without any attachments.

[0049] In other words, it is the minimum constituent unit including the support bracket 20 and the cutting unit 30.

[0050] The common base unit 12 serves as the basic framework.

[0051] The common base unit 12 is designed to function independently.

[0052] The cutting unit 30 can operate even when the front work attachment is not attached.

[0053] The cutting unit 30 operates independently, regardless of whether an attachment is attached or not.

[0054] This independent operation will be explained with reference to Figures 4 and 5.

[0055] Figures 5, 11, and 23 show the state in which the attachment can be separated or replaced from the common base unit 12. In particular, in the embodiments shown in Figures 11 and 23 to 24, the mounting ears 27 of the bucket 40 and the side plates 21A and 21B of the lower bracket 21 are formed as separate components, and their relative positions are defined by mounting pins 71 and 72. Therefore, even if the body shape, capacity, claw portion, side plate shape, or rear reinforcement structure of the bucket 40 is changed, it can be replaced and attached to the same lower bracket 21 by standardizing the specifications of the mounting ears 27 and mounting pins 71 and 72.

[0056] In Figure 5, the bucket 40, rake 50, and grapple 60 are separated.

[0057] The common base unit 12 is independent of all these attachments. That is, even when the front work attachment is removed, the lower bracket 21, cutting unit 30, cutting blade 32, receiving section 34, drive cylinder 38, hydraulic valve block 81, hydraulic piping 80, and necessary pivot supports remain on the common base unit 12 side (see Figures 14, 18, 25, and 27). Therefore, even when replacing the bucket 40 with a grapple 60 or rake 50, the need to remove the main parts of the cutting mechanism from the work tool side is reduced.

[0058] Even when the attachment is not installed, the configuration of the cutting unit 30 is maintained. The pin insertion holes 24, 25 of the lower bracket 21 or the side plates 21A, 21B can be involved in at least part of the support or load transmission of the cutting unit 30, even when the front work attachment is not installed.

[0059] The cutting blade 32 of the cutting unit 30 can be rotated even when it is not attached.

[0060] Furthermore, the receiving portion 34 also remains held in place by the support bracket 20 or the lower bracket 21. The receiving portion 34 may be supported independently of the bucket 40 side member, or it may cooperate with the guide portion or holding portion on the bucket 40 side.

[0061] In this state, the tree to be felled can be sheared between the cutting blade 32 and the receiving part 34.

[0062] This allows shearing operations to be performed with the front work attachment removed (see Figure 4).

[0063] Working without the attachment is useful in confined spaces where the attachment can easily become an obstacle, or when you want to reduce the weight of the equipment.

[0064] The common base unit 12 functions as a tree pruning device on its own, but the layout of the cutting blade 32 and the receiving section 34 is important in this case.

[0065] To describe the basic arrangement of the cutting unit 30 in detail, the cutting unit 30 includes configurations in which it is positioned offset to one side in the left-right direction of the support bracket 20 or the lower bracket 21 (see Figures 10, 11, 14, 23, and 25). In one embodiment corresponding to the actual product, the cutting unit 30 includes a cutting blade 32 as a movable cutter arm located outside one side of the bucket 40, a receiving portion 34 or a fixed blade 35 facing the cutting blade 32, and retaining teeth 36 capable of capturing the workpiece W. The side plates 21A, 21B on one or both sides of the lower bracket 21 can function as support parts for the rotation axis Ax of the cutting unit 30, the receiving portion 34, the reinforcing rib 100, the mounting pins 71, 72, or the hydraulic piping 80.

[0066] By positioning the support bracket 20 to one side in the width direction, a wider central area of ​​the support bracket 20 can be secured.

[0067] In this central region, a mounting space for the front work attachment is defined, and because the cutting unit 30 is shifted to one side, interference with the mounted attachment is suppressed. In the configuration in which a gap 26 or clearance is provided between the lower bracket 21 and the bucket 40, the mounting pins 71 and 72 can be easily inserted and removed, and the attachment can be swung, even if there are manufacturing errors, wear, soil adhesion, coating thickness, or minor deformation during operation. Furthermore, by positioning the mounting ears 27 formed on the back side or side plate side of the bucket 40 between or near the side plates 21A and 21B of the lower bracket 21, the bucket body 41 can be separated from the lower bracket 21, while suppressing lateral movement during mounting.

[0068] In at least one embodiment, the cutting blade 32 is designed to rotate at a position spaced laterally away from the side wall of the front work attachment. In this embodiment, its rotation trajectory is not limited to following the side wall of the front work attachment, but can be set to a position independent of the side wall by utilizing the lateral space set on the lower bracket 21 or the common base unit 12. In one embodiment corresponding to the actual product, the cutting blade 32 opens and closes around the pivot point of the lower bracket 21 provided on the side of the bucket 40, and the claws 43 or bottom plate of the bucket 40 are not used as support for the cutting blade 32.

[0069] When the front work attachment is mounted, the cutting unit 30 is positioned further outward relative to its side wall.

[0070] Therefore, the trajectory of the cutting blade 32 can be set to be outside the attachment or in a position that is less likely to interfere with the attachment, thereby suppressing collisions with the attachment when the cutting blade 32 is in operation. As a result, the cutting blade 32 can be operated even when the attachment is mounted.

[0071] This deflection configuration can be applied to multiple types of attachments.

[0072] For example, even when the bucket 40 is attached (see Figure 1), the cutting blade 32 rotates independently of the side wall of the bucket 40, at a position separated from the side wall.

[0073] Similarly, when the rake 50 is attached (see Figure 2) or when the grapple 60 is attached (see Figure 3), the cutting blade 32 rotates independently of the side wall of each attachment, at a position separated from the side wall.

[0074] In this way, the deflection arrangement achieves compatibility regardless of the type of attachment.

[0075] The basic arrangement of the cutting unit 30 can be maintained in the common base unit 12 (see Figures 4 and 5). In embodiments using a tilt mechanism, spacers, or adapters, the posture or position of the cutting unit 30 may be adjusted based on this basic arrangement.

[0076] Such a common or adjustable arrangement makes it easier to perform stable cutting operations even after changing attachments.

[0077] Next, I will explain the configuration of the swivel section.

[0078] The work device 10 is further provided with a swivel section that is attached to the support bracket 20 and rotates the entire support bracket 20.

[0079] This rotating section allows the orientation of the entire work device 10 to be adjusted as desired.

[0080] The swivel section shares the same swivel structure regardless of the type of forward work attachment. In other words, whether the attached attachment is a bucket 40, a rake 50, or a grapple 60, the same swivel structure functions.

[0081] Since the swivel mechanism is incorporated into the common base unit 12, there is no need to provide a drive source for swivel on the attachment side, thus simplifying the structure of the attachment.

[0082] The swivel section rotates the support bracket 20 around its axis.

[0083] This rotational motion allows the cutting angle of the cutting blade 32 to be freely changed.

[0084] Even if the tree is growing at an angle, the swivel section allows the cutting blade 32 to be adjusted to the tree.

[0085] The swivel section is driven by an actuator such as a hydraulic motor.

[0086] This pivoting section is often positioned on top of the support bracket 20.

[0087] The upper part of the support bracket 20 is close to the part that connects to the arm of the work vehicle.

[0088] By standardizing the slewing structure, the overall system cost can be reduced.

[0089] Furthermore, it reduces the number of connection points when changing attachments.

[0090] This further improves the usability of the common base unit 12.

[0091] The overall configuration of the work apparatus 10 consists of the basic elements described above (see Figures 1 to 3).

[0092] The following provides a more detailed explanation of the interrelationships between each component.

[0093] The support bracket 20 can adopt a robust box-shaped structure (see Figure 4).

[0094] This allows it to withstand the heavy load during cutting.

[0095] The support bracket 20 is provided with a mounting portion for attaching an attachment (see Figures 5, 12, 15, 20, 23, and 24). This mounting portion may include a first pin insertion hole 24 and a second pin insertion hole 25 provided in the side plates 21A and 21B of the lower bracket 21, or an equivalent mounting interface. The first pin insertion hole 24 and the second pin insertion hole 25 may define two parallel pin axes P1 and P2 spaced apart in the vertical or front-rear direction. These two pin axes P1 and P2 can be provided as axes separate from the rotation axis Ax of the cutting blade 32.

[0096] This mounting portion is formed on a robust part of the support bracket 20 or the lower bracket 21. A cylindrical boss, reinforcing collar, replacement bush, welded rib, spacer 95, positioning projection 96, or adapter plate 90 may be provided around the mounting portion. In one embodiment corresponding to the actual product, two mounting pins 71 and 72 pass through a pair of side plates 21A and 21B of the lower bracket 21 and a mounting lug 27 on the tool side. This allows the mounting pins 71 and 72 to function as the main connecting members for tool replacement, reducing the need to remove the pivot shaft Ax or drive link 38 of the cutting unit 30 when changing tools.

[0097] The receiving portion 34 of the cutting unit 30 may be formed integrally with the support bracket 20 (see Figure 6).

[0098] Alternatively, the receiving portion 34 may be firmly bolted to the support bracket 20.

[0099] The receiving portion 34 is the part that directly or indirectly receives the reaction force during cutting. In one embodiment corresponding to the actual product, the receiving portion 34 or the fixed blade 35 is supported not by the bottom plate or claws 43 of the bucket 40, but by the lower bracket 21, the housing of the cutting unit 30, or a support connected thereto. The receiving portion 34 may have a straight, arc-shaped, stepped, sawtooth-shaped, replaceable block-shaped, or build-up repairable shape.

[0100] Therefore, the fixing strength of the receiving portion 34 is set according to the expected cutting load (see Figures 9, 16, and 26). The main cutting reaction force can be transmitted mainly through the receiving portion 34, the fixed blade 35, the pivot axis Ax of the cutting blade 32, the pin boss portion 22, the lower bracket 21, the side plates 21A and 21B, the reinforcing rib 100, and the support bracket 20. Even when the bucket 40 is attached, the bucket body 41, the bucket side plates 42, or the bucket claws 43 can contribute to positioning, supporting, or guiding the workpiece W, but do not become essential members that receive the main cutting reaction force.

[0101] The cutting blade 32 is rotatably supported by the receiving portion 34 by a pin connection or the like.

[0102] The pivot axis Ax of the cutting blade 32 is supported on the support bracket 20 side, the lower bracket 21 side, the housing side of the cutting unit 30, or a bearing connected thereto. The pivot axis Ax may be positioned on a different axis from the mounting pins 71 and 72 of the front work attachment, and is not limited to being positioned at the same or nearby height as the mounting pins 71 and 72. In one embodiment corresponding to the actual product, the pivot axis Ax, the support point of the drive cylinder 38, and the support point of the receiving part 34 are all located together on the lower bracket 21 side, and their relative positions are maintained even when changing work tools.

[0103] This prevents wobble in the pivot axis Ax, enabling high-precision cutting.

[0104] The cylinder that drives the cutting blade 32 can be housed within the support bracket 20.

[0105] By positioning the cylinder inside the support bracket 20, it can be protected from external impacts.

[0106] The extension and retraction of the cylinder causes the cutting blade 32 to rotate smoothly back and forth.

[0107] Figure 4 shows the condition with the front work attachment not attached.

[0108] In Figure 4, the support bracket 20 is exposed.

[0109] In this state, the cutting blade 32 can be extended forward.

[0110] The receiving portion 34 is also exposed to the front.

[0111] The worker uses this open space to guide the workpiece W to the receiving section 34.

[0112] With the workpiece W in contact with the receiving portion 34, the cutting blade 32 is rotated (see Figure 8).

[0113] The cutting blade 32 presses the workpiece W against the receiving portion 34, crushing it in the process.

[0114] This allows even relatively thick workpieces W to be sheared according to the equipment specifications.

[0115] Because the front work attachment is less likely to get in the way, access to the workpiece W can be improved.

[0116] This non-wearing state is particularly useful when working in dense forests.

[0117] This prevents the front work attachment from getting caught on surrounding branches and leaves.

[0118] The operating performance of the common base unit 12 can be adjusted according to the design conditions in this way.

[0119] On the other hand, we will also discuss its operation when the front work attachment is attached.

[0120] As shown in Figures 1, 23, and 28, the cutting unit 30 can be used even with the bucket 40 attached. In one embodiment corresponding to the actual product, the bucket 40 can contribute to the positioning or support of the workpiece W, while the cutting blade 32 and receiving portion 34 are supported on the lower bracket 21 side, so the basic configuration of the cutting unit 30 is maintained even when the bucket 40 is removed.

[0121] Since the cutting blade 32 passes outside or away from the side wall of the bucket 40, contact with or damage to the bucket 40 can be suppressed. Also, in the configuration in which the bucket 40 is detachably connected to the lower bracket 21 by mounting pins 71 and 72, it is easier to leave the main part on the cutting unit 30 side intact when replacing or repairing the bucket 40. In one configuration corresponding to the finished machine, the cutting blade 32 operates as a cutter arm positioned outside the bucket 40 and closes to press the workpiece W against the receiving part 34 or the fixed blade 35.

[0122] As shown in Figure 1, the work of excavating the ground with the bucket 40 and the work of shearing trees, roots, or other objects with the cutting unit 30 can be performed continuously with the same work device 10.

[0123] This makes it possible to perform complex tasks continuously.

[0124] For example, while digging up the base of the plant, the exposed roots are cut with the cutting blade 32.

[0125] Such complex tasks can be performed without removing the attachment.

[0126] Similarly, it is also effective when the rake 50 shown in Figure 2 is attached.

[0127] The branches gathered by the rake 50 can be shredded on the spot using the cutting unit 30.

[0128] The stacking and shredding processes can be efficiently completed with a single work device 10.

[0129] Since the cutting blade 32 rotates outside the side wall of the rake 50 or in a region spaced away from the side wall, interference can be suppressed.

[0130] This can improve work efficiency.

[0131] The same advantages apply when the grapple 60 shown in Figure 3 is attached.

[0132] The Grapple 60 can grip the wood while the cutting unit 30 can cut off the ends.

[0133] This allows for precise cutting to the correct length while maintaining the gripping position.

[0134] Since the grapple 60 and the cutting unit 30 are separate components, they do not easily interfere with each other's movements. Similarly, in a configuration where the bucket 40 or rake 50 and the lower bracket 21 are detachable by mounting pins 71 and 72, it is easy to maintain the support relationship on the cutting unit 30 side even if the main body shape is changed for each forward work attachment. Even when the grapple 60 or rake 50 is attached, the pivot axis Ax, receiving part 34, drive cylinder 38, hydraulic piping 80 and load transmission path F on the lower bracket 21 side can be used in common.

[0135] The cutting unit 30 can operate without using the front work attachment as the primary load transmission member. However, the front work attachment may contribute to positioning, scooping, holding, guiding, or preventing the fall of the workpiece W, and such auxiliary functions are not excluded from the present invention.

[0136] The independence of the common base unit 12 is also utilized when attachments are mounted.

[0137] The support bracket 20 holds these attachments.

[0138] At the same time, the support bracket 20 and the lower bracket 21 receive the cutting force or reaction force of the cutting unit 30. In one embodiment corresponding to the actual product, when the cutting blade 32 presses the workpiece W against the receiving part 34, the reaction force R is transmitted to the work vehicle side via the receiving part 34 or the fixed blade 35, the pivot axis Ax, the pin boss part 22, the side plates 21A, 21B, the lower bracket 21 and the support bracket 20 (see Figure 26).

[0139] The support bracket 20 functions as the central anchor for the entire structure.

[0140] The hydraulic piping 80 to the drive cylinder 38 of the cutting unit 30 can also be located within the support bracket 20, the lower bracket 21, or protective covers 83 provided thereon (see Figures 10 and 27). In at least one embodiment, the hydraulic valve block 81, connection port 82, hose guide 84, or swivel joint is located on the common base unit 12 side, so that the hydraulic circuit for the cutting unit 30 remains on the common base unit 12 side even when work tools such as the bucket 40 are removed.

[0141] This minimizes the risk of damage to the hydraulic piping 80.

[0142] A work device 10 that can enhance safety and reliability is constructed (see Figures 1 to 3).

[0143] The hydraulic piping 80 is composed of high-pressure rubber hoses, metal piping, etc., and can be selected to have pressure resistance performance corresponding to the drive pressure of the cutting unit 30. For example, protectors, protective covers 83, hose guides 84, or swivel joints may be interposed at bends in the piping and at parts that swing due to the rotation of the arm to suppress damage due to friction or bending of the hose. In one embodiment corresponding to the finished machine, the hydraulic valve block 81 and multiple joints are arranged on the support bracket 20 or lower bracket 21 side, and the hydraulic fluid supplied to the cutting unit 30 can be managed at a location away from the tool changing section. This can suppress problems such as hydraulic leaks when pressure fluctuations occur.

[0144] The ability to access the swivel section in all directions is also supported by the support bracket 20.

[0145] The swivel section rotates the attachment and the cutting unit 30 together via the support bracket 20 (see Figure 10).

[0146] This allows for approaches from all angles.

[0147] This eliminates the need to frequently move work vehicles, contributing to energy conservation.

[0148] The work device 10 has the flexibility to adapt to a variety of environments.

[0149] The concept of a common parent unit 12 (see Figures 4 and 5) forms the basis of this flexibility.

[0150] The common base unit 12 is not merely a base component.

[0151] It is a complete and finished work tool in itself.

[0152] And attachments are available to extend its functionality.

[0153] The attachment does not easily limit the capabilities of the common base unit 12. In particular, in a configuration where the forward work attachment such as the bucket 40 is detachable from the lower bracket 21, and the lower bracket 21 remains on the common base unit 12 side, it is easy to standardize the support structure of the cutting unit 30 even when the attachment is changed. In the specific examples shown in Figures 23 to 28, even in the completed state with the bucket 40 attached, the cutting unit 30 can be identified as a lateral cutter structure independent of the bucket body 41.

[0154] The deflection of the cutting unit 30 contributes to eliminating that limitation.

[0155] One useful example of this configuration is to move the cutting unit 30 (see Figures 7-9, 16, 23, 25, and 28) to one side and support it by consolidating it on the lower bracket 21 side. This configuration allows for securing a tool mounting space in the center or front of the lower bracket 21 while positioning the cutting blade 32, receiving section 34, and drive cylinder 38 to the side.

[0156] This allowed the large central space to be freed up for other uses.

[0157] The open space allows for the attachment of a variety of work tools.

[0158] This is one of the useful features of the work device 10.

[0159] The configuration of the support bracket 20 (see Figure 6), cutting unit 30, and attachment in this embodiment is highly practical.

[0160] Because design standards are being standardized, manufacturing costs are also being reduced.

[0161] Standardizing parts also leads to easier maintenance.

[0162] The common base unit 12 has durability that allows for long-term use.

[0163] The attachments can be attached and detached quickly (see Figure 5).

[0164] The attachment to the support bracket 20 is stable (see Figures 1, 2, and 3).

[0165] The cutting operation of the cutting unit 30 (see Figure 8) is smooth and powerful.

[0166] The overall performance balance of the work device 10, the load transmission path F, and the arrangement of the hydraulic piping 80 (see Figures 9, 10, 16, 26, and 27) are adjusted according to the design conditions. In at least one embodiment, by setting the main path of the cutting reaction force R acting on the workpiece W to the receiving portion 34, pivot axis Ax, pin boss portion 22, lower bracket 21, and support bracket 20 side, rather than the bucket body 41, both tool interchangeability and load support can be achieved.

[0167] This structure enables a multi-functional work device that can handle multiple tasks with a single unit, including the state in which the attachment is removed from the common base unit 12 (see Figure 4).

[0168] It is expected to have applications in various fields, including forestry, agriculture, and construction.

[0169] Furthermore, the work device 10 is also intended for use at demolition sites, recycling sites, or civil engineering sites. In this case, by selecting the material of the cutting blade 32 and the receiving section 34, the blade tip shape, the driving force, or the protective structure according to the object, it can accommodate wood, bamboo, root stumps, resin materials, relatively small diameter metal materials, and other objects to be cut. The types and dimensions of objects that can be cut are determined according to the blade material, driving force, support strength, and safety conditions.

[0170] The connection structure between the common base unit 12 and each attachment (see Figure 6) can be configured according to the application.

[0171] This system meets the needs of modern work environments.

[0172] In this way, each part of the work apparatus 10 is configured to be closely related to each other.

[0173] The specific configuration of the cutting blade 32 will now be described. In this embodiment, the cutting blade 32 of the cutting unit 30 may be equipped with one of several cutting edge profiles in order to efficiently cut the workpiece W. This cutting edge profile is not limited to a single straight or simple arc-shaped blade, but may have a multi-stage configuration combining multiple cutting edges acting in multiple directions. Specifically, as shown in Figure 7, the cutting edge of the cutting blade 32 may be provided with a first cutting edge 32A, a second cutting edge 32B, and a third cutting edge 32C.

[0174] These cutting edges can be oriented in different directions or have different angles, and can be designed to interact with the workpiece W at different timings and through different mechanisms as the cutting operation progresses. When the cutting blade 32 rotates around the pivot axis Ax, these cutting edges act on the workpiece W sequentially or in cooperation, thereby suppressing the escape of the workpiece W and improving cutting efficiency.

[0175] The overall structure of the multiple cutting edges formed on the cutting edge of the cutting blade 32 will now be described. The first cutting edge 32A, the second cutting edge 32B, and the third cutting edge 32C are formed continuously in a specific order from the tip side to the base side (the side closer to the rotation axis Ax) of the cutting blade 32, or in the reverse arrangement. In this embodiment, as shown in Figure 7, the first cutting edge 32A is positioned on the outermost diameter side of the cutting blade 32, that is, in the region that reaches the workpiece W earliest in the rotation trajectory.

[0176] Adjacent to the first cutting edge 32A, a second cutting edge 32B is formed on the side closer to the pivot axis Ax. Furthermore, a third cutting edge 32C is positioned further inward from the second cutting edge 32B, or in a region extending at a different angle from near the boundary with the first cutting edge 32A and the second cutting edge 32B. These cutting edges have different inclination angles and are set to intersect at different angles with respect to the tangential direction when the cutting blade 32 rotates.

[0177] By employing such a multi-directional profile, the cutting blade 32 does not bite into the workpiece W in a uniform manner, but rather can apply multi-angle shearing forces to the internal structure and fiber direction of the workpiece W. In particular, when cutting workpieces W containing a large amount of fiber, such as trees and bamboo, a single straight blade may cause the fibers to slip, resulting in poor cutting or fiber residue, but the profile of this embodiment can suppress such phenomena.

[0178] First, the arrangement, angle, and functional role of the first cutting edge 32A, which performs the entry cut, will be described in detail. The first cutting edge 32A is located at the distal end of the cutting blade 32, that is, at the tip of the rotation. Therefore, in the initial stage when the cutting blade 32 begins to rotate toward the receiving portion 34, it plays the role of making contact with the outer surface of the workpiece W as quickly as possible. The angle of the first cutting edge 32A is set so that it enters the workpiece W at an acute angle.

[0179] The angle at which the first cutting edge 32A is positioned can be designed to intersect the tangent to the circular arc trajectory centered on the pivot axis Ax at a relatively shallow angle. As a result, the moment the cutting edge 32 contacts the workpiece W, it performs an entry action that thinly cuts the surface of the workpiece W along with a pressing force. This entry cutting action makes it easier to break through the outermost layer of the workpiece W, such as the bark or outer layer, in the initial stages.

[0180] As shown in Figure 7, the cutting edge of the first cutting edge 32A is formed either as a gently convex curve toward the outside or as a straight line. This shape allows for concentrated contact with the workpiece W at a single point, and then gradually widens the contact surface as the rotation progresses. Because the contact area does not increase rapidly, the load required for initial penetration can be kept low, which has the effect of reducing the load on the hydraulic drive system of the entire work device 10.

[0181] The functional role of the first cutting edge 32A is not merely to make an initial cut, but also to form a guide groove into the workpiece W. As the first cutting edge 32A bites into the workpiece W, the workpiece W is more easily fixed in place, and the behavior of the workpiece W being pushed forward or outward as the cutting edge 32 rotates is suppressed in the initial stages. This gradual entry motion forms the basis for smooth cutting by subsequent cutting edges.

[0182] Furthermore, since the first cutting edge 32A penetrates the workpiece W from a direction approximately perpendicular to the radial direction, or at an angle close to it, it can cut the fibers running in the longitudinal direction of the workpiece W in the initial stage. This initial cutting of fibers reduces the structural shape-retaining capacity of the workpiece W, which may make cutting in the next stage easier.

[0183] Next, the arrangement, angle, and functional role of the second cutting edge 32B, which assists in cutting, will be described in detail. The second cutting edge 32B is provided adjacent to the first cutting edge 32A on the rearward side of its rotation, that is, on the side closer to the rotation axis Ax. The second cutting edge 32B begins contact with the workpiece W after the first cutting edge 32A has entered the workpiece W to a certain depth, and plays a role in efficiently cutting through mainly thicker parts.

[0184] The angle of the second cutting edge 32B differs from that of the first cutting edge 32A, as it is set to intersect the circular arc trajectory centered on the rotation axis Ax at a larger angle (a steeper angle). Specifically, the second cutting edge 32B is positioned at an angle that generates a vector that strongly pushes the workpiece W downwards or towards the receiving portion 34 relative to the cutting line entered by the first cutting edge 32A. This enables a behavior in which the thick portion of the workpiece W is crushed and cut through in one swift motion, starting from the cut made by the first cutting edge 32A.

[0185] The cutting edge of the second cutting edge 32B is formed as a slightly concave or straight line at a different angle, via a gentle bend that is continuous with the first cutting edge 32A. By introducing this angle change at the connection point, the cutting force can be transmitted continuously and smoothly to the workpiece W without causing abrupt load fluctuations when the main cutting force is transferred from the first cutting edge 32A to the second cutting edge 32B.

[0186] The push-cutting assist function of the second cutting edge 32B makes it easier to convert the rotational force of the cutting edge 32 into shear energy of the workpiece W, overcoming frictional and shear resistance generated within the workpiece W. Because the angle of the second cutting edge 32B has an appropriate rise, it makes it difficult for the workpiece W to slip, and allows shearing to proceed while crushing it. As a result, even with thick branches or hard trees, it suppresses the occurrence of locking due to the wedge effect midway through, and makes it easier to maintain rotation.

[0187] Furthermore, the second cutting edge 32B shears the structure of the workpiece W while laterally expanding it in a deeper area than the region cut by the first cutting edge 32A. This efficiently expels chips and cracks generated by the cutting process, thus preventing the cutting edge from jamming. In this way, the second cutting edge 32B functions as the main driving force in the mid to late stages of the cutting process.

[0188] Next, the arrangement, angle, and functional role of the third cutting edge 32C, which can prevent the workpiece W from slipping and break off remaining fibers, will be described in detail. The third cutting edge 32C is formed in the profile of the cutting edge 32 in a region even closer to the pivot axis Ax than the second cutting edge 32B, or in a direction intersecting them. The third cutting edge 32C can play a useful role in the final stage of cutting.

[0189] The positioning angle of the third cutting edge 32C is significantly different from that of the first cutting edge 32A and the second cutting edge 32B. It is set at an angle that traps (confines) the workpiece W in the direction toward the receiving portion 34 or in the rotation direction of the cutting edge 32. Specifically, the third cutting edge 32C has a hook shape or opposing inclination angle that prevents the workpiece W from moving outward or inward as the cutting edge 32 rotates.

[0190] The presence of this third cutting edge 32C causes the workpiece W to be sandwiched between the cutting edge 32 and the receiving portion 34 during the final stage of cutting, thereby suppressing escape. With a single straight cutting edge, the workpiece W may be pushed outwards by the cutting edge during the final stage of cutting, resulting in an incomplete cut, but the third cutting edge 32C can suppress this slippage.

[0191] Furthermore, the third cutting edge 32C can play a role in breaking off remaining fibers. In shearing trees and other materials, the remaining bark and fiber bundles are flexible and strong, and can escape into the gaps between the shearing blades. The third cutting edge 32C presses these fiber bundles against the opposing surface of the receiving section 34, crushing them or cutting them with a sharp shear angle. This suppresses the occurrence of fiber residue, where a portion of the workpiece W remains connected after cutting is complete.

[0192] The cutting edge of the third cutting edge 32C preferably has a shape that cuts inward, as shown in Figure 7. This concave profile functions as a pocket that encloses the workpiece W, making it difficult for the shear force acting on the workpiece W to be dispersed in the direction of the rotation axis Ax of the cutting edge 32, and concentrating it at the shearing point. This makes it easier to cut the remaining outer layer and fiber bundles.

[0193] Here, the entire cutting process involving the cooperation of the cutting blade 32 and the receiving portion 34 will be explained step by step with reference to Figure 8. Figure 8 shows an example of a continuous operation process in which the cutting blade 32 rotates, gradually bites into the workpiece W supported by the receiving portion 34, and breaks it. This process is based on geometric cooperation to cut the workpiece W while suppressing slippage.

[0194] In the initial stage, the workpiece W is positioned on the upper surface of the receiving portion 34 or in a recess of the receiving portion 34. In this state, the cutting blade 32 rotates around the pivot axis Ax and descends toward the workpiece W. When the cutting blade 32 first contacts the workpiece W, the aforementioned first cutting edge 32A enters the outer circumference of the workpiece W at an acute angle. This initial contact stage corresponds to the first state in Figure 8.

[0195] As the first cutting edge 32A enters, a deep cut is formed on the surface of the workpiece W. At this time, because the entry angle of the first cutting edge 32A is appropriate, no excessive lateral force is generated on the workpiece W, and the workpiece W remains in place without sliding off the receiving portion 34. The first cutting edge 32A gradually penetrates deeper into the workpiece W while cutting through the outermost layer.

[0196] As the cutting blade 32 rotates further, the cutting depth by the first cutting blade 32A increases, and the cutting operation moves to the second stage. In this stage, the second cutting blade 32B begins to contact the workpiece W following the first cutting blade 32A. The second cutting blade 32B applies a force that pushes the workpiece W downwards from above in a nearly vertical direction at a more upright angle. This is the push-cutting assistance stage.

[0197] When the second cutting edge 32B is in action, most of the workpiece W is sheared by the powerful pushing force of the second cutting edge 32B. The workpiece W is compressed between the receiving portion 34, and its internal structure is destroyed while being highly compressed. While the pushing cut by the second cutting edge 32B is progressing, the first cutting edge 32A also continues to cut open the leading portion of the workpiece W, and efficient cutting is continued by the simultaneous functioning of the two cutting edges at different angles.

[0198] As the cutting progresses further and the thickness of the workpiece W decreases, the operation moves to the third stage, namely the final fracture stage. At this stage, the workpiece W may begin to exhibit a behavior (relief behavior) that tries to push it outwards from the receiving portion 34 due to the rotational force of the cutting blade 32. This relief is particularly noticeable in the thinned areas of the workpiece W just before it is cut, or in tough epidermal tissue.

[0199] In this final stage, the third cutting edge 32C plays a useful role. As shown near the final phase in Figure 8, the third cutting edge 32C wraps around the workpiece W to block its escape path and captures it. The third cutting edge 32C presses the remaining portion of the workpiece W against the cutting edge of the receiving portion 34 or the opposing surface of the receiving portion 34. This suppresses the escape (outward sliding) of the workpiece W.

[0200] The last uncut portion of the workpiece W (the area where fiber residue is likely to occur), whose escape has been suppressed, is subjected to shear and compressive forces between the third cutting edge 32C and the receiving portion 34. This suppresses tearing and allows for relatively clean fracture, similar to cutting with scissors. The final diagram in Figure 8 shows the state in which the cutting edge 32 has rotated to a position where it has passed through or is in close contact with the receiving portion 34, and the workpiece W has been divided into two.

[0201] Thus, in the cutting unit 30 of this embodiment, the multi-stage cutting edge profile of the cutting blade 32 (first cutting edge 32A, second cutting edge 32B, third cutting edge 32C) and the receiving portion 34 work together to suppress unexpected movement and slippage of the workpiece W throughout the process from the start to the end of cutting. This slip suppression mechanism makes it easier to concentrate the necessary driving force on the shearing action, thereby improving energy efficiency.

[0202] Furthermore, this series of operations can be versatile and less affected by the material, hardness, and thickness of the workpiece W. For example, even with hollow and easily split materials like bamboo, the first cutting edge 32A smoothly enters to suppress splitting, the second cutting edge 32B crushes it, and the third cutting edge 32C cuts the long fibers, thus improving the finish. Even with hardwoods or damp green wood, shearing can be performed while suppressing overload through a gradual biting action.

[0203] Furthermore, it is desirable that the boundary regions of the first cutting edge 32A, the second cutting edge 32B, and the third cutting edge 32C of the cutting blade 32 be connected with an appropriate radius (R) or gentle transition slope to avoid stress concentration. This prevents excessive stress from concentrating on a part of the cutting edge, which can cause chipping or breakage, even when high cutting resistance occurs, and contributes to extending the lifespan of the cutting blade 32.

[0204] In this way, by integrating multiple cutting blades with different functional roles into a single cutting blade 32 (see Figure 7), such as a first cutting blade 32A capable of entry cutting, a second cutting blade 32B capable of assisting with push cutting, and a third cutting blade 32C capable of preventing slippage and breaking remaining fibers, the cutting performance and operational reliability can be improved even when a forward work attachment is attached.

[0205] Next, a control system for the work device 10 according to a second embodiment of the present invention will be described. In the second embodiment, a collaborative control system may be employed that controls the operation of the cutting unit 30 based on detection signals from various sensors provided on the forward work attachment. Specifically, a pressure sensor (holding force detection unit) for measuring the holding force or contact pressure on the workpiece W can be provided on the gripping arm portion of the grapple 60 or on the mounting portion of the bucket 40. In addition, a load sensor for detecting the cutting load (pressure of the hydraulic cylinder or driving torque) acting on the cutting blade 32 may be provided around the support bracket 20 of the cutting unit 30 or the rotation axis Ax of the cutting blade 32.

[0206] These sensors transmit detection signals via electrical wiring or wireless communication to a control controller mounted in the driver's seat of the work vehicle, or to a local controller built into the work device 10. The controller is a computing device equipped with a processor (CPU, etc.) and memory, and outputs a control signal to the electromagnetic control valve of the hydraulic circuit that drives the cutting blade 32 of the cutting unit 30 based on the input signals from the sensors. This realizes active synchronized control that automatically changes the drive timing, operating speed, and cutting pressure of the cutting blade 32 in synchronization with the holding state of the workpiece W by the forward work attachment.

[0207] For example, when the pressure sensor detects that the grapple 60 has gripped the log W, which is the material to be cut, the controller determines whether the gripping force of the grapple 60 has reached a preset threshold (holding stability load). If it is determined that the holding force has reached the threshold and the material W is stably fixed, the controller can start the operation of the cutting unit 30 based on the operator's operation or automatic control. This reduces the burden on the operator and suppresses malfunctions that occur when the grip is insufficient.

[0208] Furthermore, during automatic cutting, the rotation speed of the cutting blade 32 is continuously and in real time controlled according to the magnitude of the cutting load detected by the load sensor. Specifically, in the initial stage when the first cutting edge 32A of the cutting blade 32 enters the workpiece W, the load is relatively small, so the amount of hydraulic fluid supplied to the hydraulic cylinder is maximized to rotate the cutting blade 32 at high speed. Subsequently, when the load sensor detects that the cutting load has rapidly increased as the second cutting edge 32B bites deep into the workpiece W, the controller automatically switches the hydraulic circuit to "high pressure / low speed mode". This prevents stalling of the hydraulic motor and drive cylinder, and allows the cutting operation to continue with powerful torque.

[0209] Then, when the third cutting edge 32C of the cutting blade 32 reaches the final stage of operation, the uncut portion of the workpiece W decreases and the load begins to decrease. Upon detecting this load reduction, the controller can return to "low-pressure, high-speed mode" to quickly complete the breaking of the last remaining fibers. At the moment the breaking is complete (when the load falls below a predetermined value, or when the rotation angle sensor detects the stroke end), the controller can automatically reverse rotation (retract rotation) of the cutting blade 32 and automatically return the cylinder to its initial position. This series of synchronized automatic controls can suppress the consumption of unnecessary hydraulic energy.

[0210] In active synchronized control by a controller, a pressure sensor acting as a load sensor may monitor the differential pressure (effective drive pressure) between the bottom-side pressure and the rod-side pressure of the drive cylinder of the cutting blade 32. If this differential pressure exceeds a predetermined overload threshold, a control logic can be employed that temporarily suspends the stroke movement of the cylinder, automatically reverses its movement (step-back movement) by a small distance, and then resumes the cutting operation in order to suppress chipping of the cutting blade 32 and damage to the cylinder. This makes it possible to cut hard workpieces in stages.

[0211] Next, the attachment automatic recognition mechanism constituting the automatic attachment exchange system will be described for the work device 10 according to the third embodiment of the present invention. The mounting portion of the front work attachment (bucket 40, rake 50, grapple 60) on the support bracket 20 can be provided with an identification unit (for example, a proximity sensor, limit switch, or RFID tag and reader) for automatically identifying the type of attachment. The control controller on the support bracket 20 side may change the maximum operating pressure of the cutting unit 30 based on the attachment identification signal obtained from the identification unit. This makes it possible to achieve cutting operations according to the strength and allowable load of the mounted attachment.

[0212] A work device 10 according to a fourth embodiment of the present invention will now be described. In this embodiment, an imaging unit (camera) for monitoring the work area and a LiDAR sensor for three-dimensional distance measurement may be placed at an appropriate location on the support bracket 20 or arm. The control controller performs image recognition processing on the image data obtained from the imaging unit and can determine whether or not the worker's hands and feet, metal, hard rock, or other obstacles have entered the cutting area between the receiving unit 34 and the cutting blade 32. If the entry of an inappropriate obstacle is detected, the control controller may shut off the hydraulic supply to the drive cylinder of the cutting unit 30, stop the rotational movement of the cutting blade 32 via the electromagnetic brake, and output a warning via an alarm buzzer or warning lamp inside the cab of the work vehicle. This makes it possible to achieve cutting work with enhanced safety, regardless of whether or not a forward work attachment is used.

[0213] A working device 10 according to a fifth embodiment of the present invention will now be described. In this embodiment, a highly damping rubber mount or hydraulic damper (shock absorber) may be interposed between the support bracket 20 and the fixed part of the cutting unit 30 in order to mitigate the cutting reaction force generated when the cutting blade 32 of the cutting unit 30 presses the workpiece W against the receiving part 34 and to suppress the transmission of impact to the support bracket 20 and the arm of the work vehicle. During the cutting operation, the impact load transmitted along the load transmission path F from the receiving part 34 to the support bracket 20 can be absorbed or dampened by this shock absorber. In addition, a plurality of hollow ribs and honeycomb structures may be arranged inside the support bracket 20 to avoid the concentration of cutting load, thereby achieving both weight reduction and high rigidity of the support bracket 20.

[0214] A work device 10 according to a sixth embodiment of the present invention will now be described. In this embodiment, in order to quickly and safely replace multiple types of forward work attachments, a hydraulic / electrical integrated multi-coupler (automatic attachment / detachment mechanism) that allows electrical wiring and hydraulic piping to be attached and detached simultaneously with a single touch may be provided at the connection part between the support bracket 20 and the attachment. When replacing an attachment, the multi-coupler is fastened or detached by operating a switch in the cab or by driving a hydraulic actuator for automatic replacement. To suppress liquid leakage and short circuits when attaching and detaching the hydraulic piping 80 and electrical connector, a self-shielding valve structure and drip-proof electrode pins can be adopted for the multi-coupler. This makes it possible to shorten the replacement work time and improve work efficiency.

[0215] A common mounting plate, which houses a pair of automatic locking hooks, hydraulic piping connection ports, and electrical contact connectors, is firmly fixed to the front of the support bracket 20. On the other hand, each forward work attachment is provided with a mounting plate that precisely mates with this common mounting plate. The mounting plate has pin holes into which the automatic locking hooks on the support bracket 20 engage, as well as the corresponding hydraulic and electrical connectors. As a result, all physical and energetic connections are completed in a single action simply by approaching the support bracket 20 and pressing it against the mounting plate of the forward work attachment.

[0216] To elaborate on the mechanical locking mechanism, a hydraulically driven locking pin located on the support bracket 20 automatically slides horizontally into the pin boss (pin hole) of the front work attachment. The entry state of this locking pin is detected by a proximity sensor located inside the support bracket 20, and the locked state is notified to the display monitor in the driver's seat. The locking pin may also be equipped with a double retention mechanism consisting of a pressure-holding valve (pilot check valve) of the hydraulic cylinder and a mechanical spring, which can reduce the risk of the front work attachment separating or falling even if the hydraulic power source of the work vehicle is lost.

[0217] Furthermore, in the hydraulic / electrical integrated multi-coupler, the operating status signal of the attachment transmitted via the electrical contact connector may be monitored by the control controller on the support bracket 20 side. If an abnormality such as a break in the signal line of the electrical contact connector occurs during attachment or operation, the control controller can determine this as a sign of attachment detachment or connection failure, and switch the safety shut-off valve (pilot-operated solenoid valve) located in both the hydraulic drive circuit of the cutting unit 30 and the hydraulic drive circuit of the attachment to the shut-off side. This fail-safe control can prevent the cutting operation from continuing if the attachment is not in a predetermined locked state or if signal communication is interrupted.

[0218] Non-drip type quick couplers may be used for the hydraulic connection ports. These couplers have a structure that prevents leakage of hydraulic fluid to the outside by opening and closing an internal check valve during connection and disconnection. This reduces environmental pollution and prevents air and dust from entering the piping. In addition, waterproof and dustproof contact-type or non-contact-type power supply and communication connectors may be used for the electrical contact connectors, making it easier to maintain power supply and sensor signal communication even in construction sites and forestry sites where muddy water and dust are scattered.

[0219] Furthermore, the work device 10 according to this embodiment is equipped with a fault prediction and diagnosis system (prognostics system) that automatically collects and analyzes operational log data of the support bracket 20, cutting unit 30, and each attached attachment, in order to further improve reliability under harsh operating environments over long periods of time. Multiple 3-axis acceleration sensors and temperature sensors built into the support bracket 20 constantly sample the vibration spectrum and the heat generation temperature of the main bearing parts during cutting operations and attachment driving, and upload this data to a management server on the cloud via an electrical contact connector and a vehicle-side communication unit. A diagnostic algorithm installed on the management server extracts unique frequency components (for example, minute chipping of the cutting blade 32 or abnormal resonance caused by wear of the rotating shaft Ax) from the accumulated vibration data, and if an abnormal trend exceeding a threshold is detected, an alert prompting parts replacement or maintenance is displayed on the operator's monitor. This makes it possible to perform preventive maintenance before fatal damage occurs, minimizing downtime.

[0220] This automatic exchange system allows for a series of complex processes to be performed continuously in a short time. For example, after lumber collected by the grapple 60 is cut as needed by the cutting unit 30, the grapple 60 is detached and replaced with the bucket 40, and the soil around the cut lumber is excavated and backfilled. This reduces the need for workers to manually pull out connecting pins or manually detach and reattach hydraulic hoses to bleed air, thereby reducing the workload associated with attachment changes.

[0221] In addition, when the attachment automatic recognition mechanism detects that a forward work attachment (bucket 40, rake 50, grapple 60) has been replaced, it may automatically calibrate (initial self-adjust) the maximum supply flow rate and response delay time of the entire hydraulic system, in addition to the maximum operating pressure. For example, if the grapple 60, which requires a high flow rate, is replaced with the bucket 40, which requires precise positioning and control at a relatively low flow rate, the control controller can send a signal to the electromagnetic proportional valve that controls the swash plate angle of the main hydraulic pump, and adjust the base hydraulic flow rate to a low flow rate mode. This can suppress the rise in oil temperature caused by excess oil escaping from the relief valve to the tank, thereby suppressing deterioration of the hydraulic fluid and thermal damage to the seals.

[0222] Furthermore, the adaptive control program incorporated into the control controller may determine the material of the workpiece W (for example, softwood such as conifers, hardwood such as broadleaf trees, or high-toughness material such as bamboo) based on the initial pressure rise characteristics (pressure rise gradient and rotation angle change per unit time) obtained from the load sensor immediately after the start of the cutting operation. For example, if it is determined that the pressure rise is steep and the rotation speed decreases significantly, it may be determined that the workpiece W is a hardwood with high hardness, and a "vibration cutting mode" may be activated in which the cutting blade 32 is made to reciprocate slightly (pulsatingly vibrate) at a predetermined frequency while maintaining the cylinder drive hydraulic pressure at high pressure. This can reduce the frictional resistance between the blade tip and the fibers compared to static cutting.

[0223] Next, examples of the application of the work device 10 according to the seventh embodiment of the present invention to remotely controlled and autonomous work systems will be described. The work device 10 of this embodiment can be designed to be mounted on ICT construction machinery or autonomous automated robot arms in forestry. A laser scanner (LiDAR sensor) or stereo camera for three-dimensional scanning of the workpiece W and surrounding obstacles may be mounted on the outer surface of the support bracket 20 or on the shield portion of the cutting unit 30.

[0224] The point cloud and image data acquired by these 3D recognition sensors are transmitted to the onboard computer of the work vehicle or to a remote server in the cloud. The recognition algorithm on the server (an image recognition engine using artificial intelligence or machine learning models) identifies the shape of the tree to be felled, the diameter of the trunk, the standing position (angle of inclination), and the distance to other attachments in the surrounding area from the acquired spatial data, and can calculate a suitable cutting position or approach line for cutting.

[0225] In automatic driving mode, the arm of the work vehicle is guided toward the calculated cutting position. When the work device 10 approaches the target tree, the controller opens the attached front work attachment (e.g., grapple 60) to a predetermined angle to match the thickness of the tree and grips the tree. Simultaneously with the completion of gripping, or based on an operation permission signal after gripping is complete, the cutting unit 30 is activated, and the cutting blade 32 rotates according to the aforementioned profile to shear the tree. The sheared tree, still gripped by the grapple 60, is rotated and transported to a pre-set loading area or the loading bed of a transport truck and unloaded.

[0226] In remote control mode, video footage captured by the stereo camera is transmitted via a communication line (5G mobile communication, 6G mobile communication, wired communication, Wi-Fi, or dedicated wireless communication, etc.) to a display device for the operator installed on the remote control base. The operator can perform felling and cutting work using the control device while viewing the video footage. This can help to reduce the risk of workers approaching dangerous areas in disaster recovery sites or on steep slopes.

[0227] Next, variations of the cutting unit 30 of the work device 10 according to the eighth embodiment of the present invention will be described. In the embodiments described above, the cutting unit 30 was shown to be fixed to one side in the left-right direction relative to the support bracket 20, but in this embodiment, the cutting unit may be provided with a cutting unit attitude variable mechanism that allows the cutting unit 30 itself to swivel (tilt-swing) relative to the support bracket 20. A rotary hydraulic actuator or a tilt cylinder can be interposed between the support bracket 20 and the housing of the cutting unit 30.

[0228] This posture-adjustable mechanism allows the entire cutting unit 30 to be tilted horizontally or vertically relative to the support bracket 20. For example, it may be possible to tilt it by a predetermined angle horizontally or vertically. This makes it possible to tilt only the cutting angle of the cutting blade 32 diagonally while maintaining the support bracket 20 (and the forward work attachment mounted thereon) in a predetermined posture. This configuration is useful when you want to cut down trees growing diagonally along a slope at ground level, or when you want to selectively prune only specific branches from a complex network of branches and leaves.

[0229] Furthermore, improvements may be made to the cutting edge material and surface treatment of the cutting blade 32. The base material of the cutting blade 32 can be chromium-molybdenum steel or high-tensile steel, which have high toughness, and the cutting edge portion (all or part of the first cutting edge 32A, the second cutting edge 32B, and the third cutting edge 32C) may be integrated with a cemented carbide (such as tungsten carbide) tip by laser overlay welding, brazing, bolt fixing, or fitting. Furthermore, the surface may be coated with a physical vapor deposition (PVD) coating such as titanium aluminum nitride (TiAlN) to enhance wear resistance. This makes it possible to suppress wear or chipping of the cutting edge even when cutting wood mixed with soil or stones, or relatively soft or thin-walled metal pipes such as hard plastics or aluminum.

[0230] Furthermore, a coolant / air blow unit that sprays compressed air or cleaning water into the support bracket 20 may be provided as a cooling and self-cleaning system for the cutting blade 32. When the cutting blade 32 rotates and retracts into the shield (housing), air blow or high-pressure water is automatically sprayed from a spray nozzle located in the retracted position toward the cutting edge. This removes foreign matter such as sap, sawdust, or mud that adheres to the cutting edge during cutting, suppresses the temperature rise of the cutting edge, and facilitates the transition to the next cutting operation. This self-cleaning system can suppress problems such as resin adhering to the cutting edge and increasing cutting resistance.

[0231] Furthermore, as a safety measure, an operation indicator light, such as an LED, may be installed around the cutting blade 32. This indicator light flashes or lights up red to warn surrounding workers of danger while the cutting unit 30 is in operation (the cutting blade 32 is rotatable or rotating). When the cutting unit 30 is in a non-operational, safe state, it may be green or off. This allows surrounding auxiliary workers to visually confirm whether the work device 10 is currently performing cutting work, thereby reducing the risk of personal injury caused by accidentally entering the working device's range of motion. In this way, a configuration can be selected that improves at least one of the following: workability, replaceability, autonomy, durability, and safety.

[0232] Next, the self-diagnostic function and wear / damage detection system of the work device 10 according to the ninth embodiment of the present invention will be described. During the operation of the cutting unit 30, particularly in the process in which the first cutting edge 32A to the third cutting edge 32C sequentially bite into the workpiece W, stress and vibration are generated around the support bracket 20 and the pivot axis Ax. In this embodiment, an AE (acoustic emission) sensor or an acceleration sensor for detecting vibration energy in a specific frequency band may be provided inside the support bracket 20. Detection signals from these self-diagnostic sensors are transmitted to the controller.

[0233] The controller compares a reference vibration waveform detected during normal cutting operation with the measured waveform detected during actual operation. If chipping or cracking occurs in any of the first cutting edges 32A to the third cutting edges 32C, a unique high-frequency shock transient response may occur at the moment the workpiece W is sheared. The controller may determine that the cutting edge has been damaged if the frequency or amplitude of this unique waveform exceeds a preset fault threshold. Upon determining damage, the controller returns the hydraulic solenoid valve to the neutral position to stop the rotation of the cutting edge 32, displays an error warning on the display in the driver's seat, and prompts the operator to perform maintenance. This helps to suppress secondary damage to the entire support bracket 20 caused by minor damage to the cutting edge.

[0234] Furthermore, the self-diagnostic system may include a temperature and pressure sensor (not shown) that monitors the hydraulic fluid temperature and pressure of the hydraulic system that drives the cylinder of the cutting unit 30. If the hydraulic fluid temperature exceeds a specified upper limit temperature (e.g., set temperature) due to continuous cutting work, there is a concern that the sealing members of the hydraulic cylinder may deteriorate and the responsiveness may worsen due to a decrease in the viscosity of the hydraulic fluid. When the controller detects that the hydraulic fluid temperature has reached a warning level, it may automatically reduce the rotation speed of the cutting blade 32 temporarily or perform temperature compensation protection control that includes a pause cycle. This can suppress overheating of the hydraulic system and maintain stable operation of the machine.

[0235] Next, a modified example of the cutting edge profile of the cutting unit 30 according to the tenth embodiment of the present invention will be described. In addition to the geometric configuration of the three cutting edges (32A, 32B, 32C) in the above-described embodiment, the cutting edge 32 of this embodiment may employ a replaceable carbide tip structure that can be individually attached and detached and replaced for areas that experience particularly severe wear. Tips made of a superhard alloy such as tungsten carbide, which has excellent wear resistance, are fixed to the surface of each of the first cutting edge 32A, the second cutting edge 32B, and the third cutting edge 32C, or to the boundary between them, by bolt connection or a wedge structure using tapered fitting.

[0236] This replaceable carbide tip structure reduces the need to replace the entire cutting blade 32 even if the cutting unit 30 is used for a long period and only some of the cutting edges wear down locally. Field workers can replace only the worn carbide tip (for example, the tip of the first cutting edge 32A, which is subject to load during entry, or the tip of the third cutting edge 32C, which crushes the fibers) with a new tip simply by removing the bolt. This reduces running costs as a consumable part and makes it easier to maintain cutting performance.

[0237] Next, a work system with remote control and automatic tracking control according to an eleventh embodiment of the present invention will be described. The work vehicle to which the work device 10 according to this embodiment is attached may be equipped with a LiDAR (light detection and ranging) sensor for acquiring three-dimensional point cloud data of the surroundings, and a multispectral 3D stereo camera (not shown). Image data and distance data of the surrounding environment obtained by these sensing devices are transmitted to the main controller on the vehicle side equipped with a processor, and three-dimensional mapping of the surrounding trees is performed.

[0238] The main controller may use an image recognition algorithm to calculate the standing position, trunk thickness (diameter), and inclination angle of the tree to be felled based on the acquired 3D data. When the operator selects the automatic approach mode from the driver's seat or via a remote control device, the vehicle's arm and support bracket 20 approach the calculated tree trunk along a predetermined path. The swivel section then rotates the entire support bracket 20, positioning the cutting blade 32 and receiving section 34 of the cutting unit 30 so that they intersect the direction of the tree trunk fibers at a predetermined angle. This allows for setting a posture that reduces cutting resistance even for trees growing at an angle.

[0239] After the automatic approach is complete, if an attachment such as a grapple 60 is attached, the attachment is first driven to grip the tree in the appropriate position. Simultaneously with or after the grip is complete, when it is confirmed that the holding force data transmitted from the pressure sensor has reached a stable threshold, the control system supplies hydraulic fluid to the hydraulic cylinder of the cutting unit 30 and starts the rotation of the cutting blade 32. At this time, the rotation stroke of the cutting blade 32 may be adjusted based on the tree diameter data measured during the automatic approach. For example, in the case of a small diameter tree, the cutting blade 32 may be reversed and retracted when it reaches the required rotation angle without rotating it through its entire stroke. This can reduce idle time and shorten the cycle time.

[0240] Furthermore, when the front work attachment is not attached, i.e., when the common base unit 12 is operating independently (see Figure 4), safety barrier monitoring control may be performed to ensure safety around the work device 10. Multiple infrared sensors or ultrasonic sensors positioned on the outer circumference of the support bracket 20 detect whether any obstacles or people are in the operating area of ​​the cutting unit 30. If entry into a restricted area is detected during cutting, the controller stops the cutting blade 32 by opening the main relief valve of the hydraulic system or closing the safety shut-off valve. This function helps to reduce the risk of personal injury even when the attachment is not attached and there is no guard.

[0241] Further embodiments and modifications are described below. The following embodiments are merely illustrative, and it is not intended that all of the components described in each embodiment are essential and inseparable. At least one embodiment may include an FGB-50M type work device in which the cutting mechanism is concentrated on the lower bracket 21 side, the bucket 40 and grapple 60 are provided as usable work tools, and the rake 50 can be added or replaced as a work tool corresponding to the same mounting method. However, the present invention is not limited to the model name, manufacturing order, or completion date of each work tool.

[0242] In this specification, the support bracket 20 broadly means a member that is directly or indirectly connected to the arm of the work vehicle and capable of supporting the cutting unit 30, the forward work attachment, the swivel section, the tilt mechanism, hydraulic piping, electrical wiring, and other components. The support bracket 20 may be a single component or an assembly of multiple plates, box frames, links, adapters, couplers, and reinforcing members. The support bracket 20 may include a lower bracket 21 separate from the forward work attachment, and the lower bracket 21 may include side plates 21A, 21B, pin insertion holes 24, 25, connecting shafts, bosses, reinforcing ribs, or spacers.

[0243] In this specification, the common base unit 12 refers to a unit that includes at least a support bracket 20 and a cutting unit 30, and is capable of performing at least one of the following functions even when the front work attachment is not attached: cutting function, holding function, guiding function, or supporting function. The common base unit 12 may also include a swivel section, a tilt section, a hydraulic control valve, a pipe protection section, a sensor, a control section, a locking mechanism, and the like.

[0244] In this specification, the forward work attachment is not limited to the bucket 40, rake 50, and grapple 60, but may include forks, skeleton buckets, clamps, restraints, logging tools, leveling boards, root removal tools, crushing aids, conveying tools, guides, or combinations thereof.

[0245] In this specification, connection by two pins may include not only a configuration using a first mounting pin 71 and a second mounting pin 72, but also configurations using a pin and a hook, a pin and a slider, a pin and a wedge, a pin and a bolt, or a pin and a hydraulic lock in combination. The two pins do not necessarily have to be of the same dimensions, and the pin diameter, pin length, axial position, retaining method, or fitting member may be adjusted for each attachment. Furthermore, the first mounting pin 71 and the second mounting pin 72 may be configured to simultaneously penetrate the side plates 21A, 21B of the lower bracket 21 and the mounting ears 27 of the bucket 40 or the like.

[0246] In this specification, the statement that the cutting load is primarily received on the support bracket side includes a configuration in which the primary cutting reaction force is closed through the support bracket 20, the lower bracket 21, the receiving portion 34, the pivot portion of the cutting blade 32, the drive cylinder support portion, the reinforcing rib, or load transmission portions connected thereto. This is not intended to immediately exclude the possibility that some contact, vibration, guide contact, or secondary reaction forces during operation may be transmitted to the front work attachment side.

[0247] In this specification, "separate parts" means a configuration in which the cutting unit 30 and the forward work attachment can be handled separately during manufacturing, shipping, use, or maintenance. For example, a configuration in which the cutting unit 30 and the forward work attachment have separate components, separate modules, or separate load transmission paths may be included in the definition of separate parts. Even if the forward work attachment, such as the bucket 40, and the lower bracket 21 are connected by mounting pins 71 and 72 and operate as a single unit during use, if they are not fixed inseparably by welding or the like, and can be distinguished from the viewpoint of structure, function, maintenance, or load transmission, they may be included in the definition of separate parts in this specification.

[0248] In this specification, "operable in an unattached state" means that at least the main parts of the cutting blade 32, receiving section 34, and drive unit can act on the object to be cut even with the front work attachment removed. Even in an unattached state, the lower bracket 21, protective cover, guide, spacer, temporary holder, or transport member may remain on the common base unit 12 side.

[0249] The embodiments described herein are not mutually exclusive. For example, a left-biased cutting unit can be optionally combined with a replaceable tip blade, a hydraulic / electrical integrated multi-coupler, an attachment recognition unit, a safety barrier monitoring unit, or a remote control function.

[0250] The expressions "preferred," "desirable," "possible," and "can be used" in the following embodiments indicate examples that are likely to yield a particular effect, and do not mean that the configuration is always essential. Dimensions, materials, angles, pressure, flow rate, communication method, and control thresholds can also be changed according to the operating environment and scale of the device.

[0251] (Example: Basic Common Base Unit) In this embodiment, the common base unit 12 is configured as an independent work tool consisting of a support bracket 20 and a cutting unit 30. This embodiment has a configuration common to the above embodiment, but is an example that particularly facilitates the independence of cutting work and attachment replacement, and can be arbitrarily combined with other embodiments.

[0252] In this embodiment, the support bracket 20 is made of cast steel or a forged member and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for application-specific attachments as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when application-specific attachments are replaced.

[0253] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic motor and a linkage mechanism, and a receiving part 34 facing it. When securing space to guide the object to the cutting position without attaching a forward work attachment, the main cutting reaction force forms a closed loop through the receiving part 34, the pivot support, and the support bracket 20, and the application-specific attachments mainly perform the functions of guiding, holding, excavating, accumulating, or conveying.

[0254] The attachment for each application can be based on a configuration using the first mounting pin 71 and the second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0255] In this embodiment, even when application-specific attachments are mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0256] Furthermore, with the application-specific attachments removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0257] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0258] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0259] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting status of the application-specific attachment, the locking status, the holding force, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0260] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the application-specific attachments and that the main cutting load is received by the support bracket 20 can be maintained.

[0261] The configuration of the basic common base unit described in this embodiment is just one example for achieving independence between cutting operations and attachment replacement, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0262] (Example: Bucket Specification) In this embodiment, the bucket 40 is attached as a forward work attachment. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to achieve continuous processing of soil and sand and cutting of stumps or wood, and can be arbitrarily combined with other embodiments.

[0263] In this embodiment, the support bracket 20 is composed of a box-shaped frame and reinforcing ribs, and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the replacement attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the replacement attachment is replaced.

[0264] The cutting unit 30 comprises a cutting blade 32 driven by an electric or electro-hydraulic actuator and a receiving portion 34 facing it. When excavating, scooping, and cutting are performed continuously, the main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support, and the support bracket 20, and the replaceable attachment mainly performs the functions of guiding, holding, excavating, accumulating, or transporting.

[0265] The attachment to be replaced may be mounted using a configuration that primarily utilizes a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0266] In this embodiment, even when the attachment to be replaced is mounted, a necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion or bottom plate of the attachment. The clearance is not limited to a fixed value and may be adjusted by a spacer, an adapter or a position adjusting mechanism.

[0267] Also, in the state where the attachment to be replaced is removed, the common mother unit 12 can approach the object alone. When used in the non-mounted state, a simple guide, a temporary holding claw, an anti-tip-over member or a protective cover may be mounted in front of or on the side of the cutting unit 30.

[0268] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring or communication wiring can be arranged inside the support bracket 20, in the outer groove portion, in the protective duct or inside the detachable cover. Thereby, the number of connection points during attachment replacement can be reduced, and piping damage, connection omission or foreign matter intrusion can be suppressed.

[0269] Furthermore, the cutting blade 32, the receiving portion 34, the bearing, the bush, the seal, the tip or the guard may be configured as consumable members that can be replaced according to the usage environment. These members can be maintained by any of single-piece replacement, cassette replacement, or replacement of the entire cutting unit 30.

[0270] In the control according to this embodiment, the operating permission condition of the cutting unit 30 may be set based on the mounted state, locked state, holding force, angle of the cutting blade 32, hydraulic pressure or state of the safety monitoring area of the attachment to be replaced. Thereby, it is possible to cope with each mode of manual operation, semi-automatic operation and automatic operation.

[0271] In a modification of this embodiment, the cutting unit 30 can be arranged on the left side, right side, upper side, lower side or diagonal direction. Even if the arrangement direction is changed, the basic idea that the cutting unit 30 is structurally and functionally independent from the attachment to be replaced and the main cutting load is received on the support bracket 20 side can be maintained.

[0272] The configuration of the bucket specification described in this embodiment is an example for realizing the continuity of earthwork and the cutting of root stocks or timbers, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific working application.

[0273] (Embodiment: rake specification) In this embodiment, the rake 50 is mounted as a front working attachment. This embodiment is an example for facilitating the combination of the accumulation work and the cutting work while having a configuration common to the above-described embodiment, and can be arbitrarily combined with other embodiments.

[0274] In this embodiment, the support bracket 20 may be composed of a welded steel plate body and have the shaft support portion of the cutting blade 32, the support portion of the receiving portion 34, and the mounting portion of the front working attachment as load transmission portions independent of each other. Thereby, even if the front working attachment is replaced, the basic support relationship of the cutting unit 30 can be maintained.

[0275] The cutting unit 30 includes a cutting blade 32 driven by a hydraulic cylinder and a receiving portion 34 opposed thereto. When shredding branches, bamboo, shrubs, or wood pieces with the cutting unit 30 while scraping them, the main cutting reaction force forms a closed loop through the receiving portion 34, the shaft support portion, and the support bracket 20, and the front working attachment mainly functions as a guiding, holding, excavating, accumulating, or transporting function.

[0276] The attachment of the front working attachment may be based on a configuration using the first attachment pin 71 and the second attachment pin 72, but an auxiliary hook, a wedge, a bolt, a slide engagement portion, a hydraulic lock, or a positioning projection may be used in combination. The number of pins or the standard of the pins can be changed within a range that does not impair the independent support structure of the cutting unit 30.

[0277] In this embodiment, even when a forward work attachment is mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or bottom plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0278] Furthermore, with the front work attachment removed, the common base unit 12 can approach the object independently. When used without the attachment, a simple guide, temporary holding claw, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0279] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0280] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0281] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the front work attachment, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0282] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the front work attachment and that the main cutting load is received on the support bracket 20 side can be maintained.

[0283] The rake configuration described in this embodiment is just one example for realizing a combination of stacking and cutting operations, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0284] (Example: Grapple Specification) In this embodiment, a grapple 60 is attached as a forward work attachment. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to obtain improvements in holding accuracy and cutting accuracy, and can be arbitrarily combined with other embodiments.

[0285] In this embodiment, the support bracket 20 is made of cast steel or a forged member and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for application-specific attachments as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when application-specific attachments are replaced.

[0286] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic motor and a linkage mechanism, and a receiving portion 34 opposite to it. When cutting the end or middle portion of the workpiece W while holding it with the gripping arm, the main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support, and the support bracket 20, and the application-specific attachments mainly perform the functions of guiding, holding, excavating, accumulating, or conveying.

[0287] The attachment for each application can be based on a configuration using the first mounting pin 71 and the second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0288] In this embodiment, even when an attachment for each use is attached, a necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or bottom plate of the attachment. The clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0289] Also, in the state where the attachment for each use is removed, the common mother unit 12 can approach the object alone. When used in the non-attached state, a simple guide, temporary holding claw, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0290] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove portion, in the protective duct, or inside the detachable cover. Thereby, the number of connection points during attachment replacement can be reduced, and piping damage, connection omission, or foreign matter intrusion can be suppressed.

[0291] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as consumable members that can be replaced according to the usage environment. These members can be maintained by any of single-piece replacement, cassette replacement, or replacement of the entire cutting unit 30.

[0292] In the control according to this embodiment, the operating permission conditions of the cutting unit 30 may be set based on the attachment state, locked state, holding force, angle of the cutting blade 32, hydraulic pressure, or state of the safety monitoring area of the attachment for each use. Thereby, it can correspond to each mode of manual operation, semi-automatic operation, and automatic operation.

[0293] In a modification of this embodiment, the cutting unit 30 can be arranged on the left side, right side, upper side, lower side, or diagonal direction. Even if the arrangement direction is changed, the basic idea that the cutting unit 30 is structurally and functionally independent from the attachment for each use and the main cutting load is received on the support bracket 20 side can be maintained.

[0294] The grapple configuration described in this embodiment is just one example for achieving improved holding and cutting accuracy, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0295] (Example: Non-attached use specification) In this embodiment, it is used with the common base unit 12 with the front work attachment removed. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to obtain improvements in handling and visibility, and can be arbitrarily combined with other embodiments.

[0296] In this embodiment, the support bracket 20 is composed of a box-shaped frame and reinforcing ribs, and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the replacement attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the replacement attachment is replaced.

[0297] The cutting unit 30 comprises a cutting blade 32 driven by an electric or electro-hydraulic actuator and a receiving part 34 facing it. When only the cutting blade 32 and the receiving part 34 are brought close to the object in confined spaces or for light work, the main cutting reaction force forms a closed loop through the receiving part 34, the pivot support, and the support bracket 20, and the attachment to be replaced mainly performs the functions of guiding, holding, excavating, accumulating, or transporting.

[0298] The attachment to be replaced may be mounted using a configuration that primarily utilizes a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0299] In this embodiment, even when an attachment to be replaced is installed, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0300] Furthermore, with the attachment to be replaced removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0301] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0302] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0303] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the attachment to be replaced, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0304] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the attachment to be replaced, and that the main cutting load is received by the support bracket 20, can be maintained.

[0305] The configuration of the non-mounted use specification described in this embodiment is just one example for achieving improved handling and visibility, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0306] (Example: Two-pin common interface) In this embodiment, the first mounting pin 71 and the second mounting pin 72 are standardized. This embodiment has a configuration common to the above embodiment, but is an example that particularly facilitates the reduction of on-site replacement time, and can be arbitrarily combined with other embodiments.

[0307] In this embodiment, the support bracket 20 is made of a welded steel plate and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the front work attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the front work attachment is replaced.

[0308] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic cylinder and a receiving portion 34 opposite to it. When different attachments are mounted with the same or approximate interaxial distance, the main cutting reaction force forms a closed loop through the receiving portion 34, the shaft support, and the support bracket 20, and the forward work attachment mainly performs the functions of guiding, holding, excavating, accumulating, or conveying.

[0309] The mounting of the forward work attachment can be based on a configuration using a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0310] In this embodiment, even when a forward work attachment is mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or bottom plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0311] Furthermore, with the front work attachment removed, the common base unit 12 can approach the object independently. When used without the attachment, a simple guide, temporary holding claw, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0312] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0313] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0314] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the front work attachment, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0315] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the front work attachment and that the main cutting load is received on the support bracket 20 side can be maintained.

[0316] The configuration of the two-pin common interface described in this embodiment is just one example of how to reduce on-site replacement time, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0317] (Example: Adapter Plate Interposed Specification) In this embodiment, an adapter plate is interposed between the support bracket 20 and the forward work attachment. This embodiment has a configuration common to the above embodiment, but is an example that is particularly designed to facilitate adaptation to existing equipment, and can be arbitrarily combined with other embodiments.

[0318] In this embodiment, the support bracket 20 is made of cast steel or a forged member and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for application-specific attachments as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when application-specific attachments are replaced.

[0319] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic motor and a linkage mechanism, and a receiving portion 34 facing it. When using existing attachments with different pin diameters or pin spacings, the main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support, and the support bracket 20, and the application-specific attachments primarily perform the functions of guiding, holding, excavating, accumulating, or conveying.

[0320] The attachment for each application can be based on a configuration using the first mounting pin 71 and the second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0321] In this embodiment, even when application-specific attachments are mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0322] Furthermore, with the application-specific attachments removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0323] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0324] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0325] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting status of the application-specific attachment, the locking status, the holding force, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0326] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the application-specific attachments and that the main cutting load is received by the support bracket 20 can be maintained.

[0327] The adapter plate configuration described in this embodiment is just one example for achieving compatibility with existing equipment, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0328] (Example: Left-side deflection configuration) In this embodiment, the cutting unit 30 is deflected to the left of the support bracket 20. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to suppress attachment interference, and can be arbitrarily combined with other embodiments.

[0329] In this embodiment, the support bracket 20 is composed of a box-shaped frame and reinforcing ribs, and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the replacement attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the replacement attachment is replaced.

[0330] The cutting unit 30 comprises a cutting blade 32 driven by an electric or electro-hydraulic actuator and a receiving portion 34 facing it. When the central area is secured as a mounting space for the front work attachment, the main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support, and the support bracket 20, and the attachment to be replaced mainly performs the functions of guiding, holding, excavating, accumulating, or transporting.

[0331] The attachment to be replaced may be mounted using a configuration that primarily utilizes a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0332] In this embodiment, even when an attachment to be replaced is installed, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0333] Furthermore, with the attachment to be replaced removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0334] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0335] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0336] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the attachment to be replaced, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0337] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the attachment to be replaced, and that the main cutting load is received by the support bracket 20, can be maintained.

[0338] The left-side deflection configuration described in this embodiment is just one example of how to suppress attachment interference, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0339] (Example: Right-side deflection configuration) In this embodiment, the cutting unit 30 is deflected to the right side of the support bracket 20. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to obtain a degree of freedom in selecting left or right configurations, and can be arbitrarily combined with other embodiments.

[0340] In this embodiment, the support bracket 20 is made of a welded steel plate and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the front work attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the front work attachment is replaced.

[0341] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic cylinder and a receiving part 34 opposite to it. When aligned with the operator's line of sight of the work vehicle or the direction of traffic at the site, the main cutting reaction force forms a closed loop through the receiving part 34, pivot support, and support bracket 20, and the forward work attachment mainly performs the functions of guiding, holding, excavating, accumulating, or transporting.

[0342] The mounting of the forward work attachment can be based on a configuration using a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0343] In this embodiment, even when a forward work attachment is mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or bottom plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0344] Furthermore, with the front work attachment removed, the common base unit 12 can approach the object independently. When used without the attachment, a simple guide, temporary holding claw, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0345] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0346] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0347] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the front work attachment, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0348] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the front work attachment and that the main cutting load is received on the support bracket 20 side can be maintained.

[0349] The configuration of the right-side deflection specification described in this embodiment is just one example of how to achieve the freedom to choose between left and right-side specifications, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0350] (Example: Double-sided cutting unit specification) In this embodiment, cutting units 30 or auxiliary cutting sections are arranged on both the left and right sides of the support bracket 20. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to obtain improvements in cutting capacity and holding capacity, and can be arbitrarily combined with other embodiments.

[0351] In this embodiment, the support bracket 20 is made of cast steel or a forged member and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for application-specific attachments as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when application-specific attachments are replaced.

[0352] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic motor and a linkage mechanism, and a receiving part 34 facing it. When cutting or holding large diameter materials or multiple materials from the left and right, the main cutting reaction force forms a closed loop through the receiving part 34, the pivot support, and the support bracket 20, and the application-specific attachments mainly perform the functions of guiding, holding, excavating, stacking, or conveying.

[0353] The attachment for each application can be based on a configuration using the first mounting pin 71 and the second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0354] In this embodiment, even when application-specific attachments are mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0355] Furthermore, with the application-specific attachments removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0356] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0357] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0358] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting status of the application-specific attachment, the locking status, the holding force, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0359] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the application-specific attachments and that the main cutting load is received by the support bracket 20 can be maintained.

[0360] The configuration of the double-sided cutting unit described in this embodiment is just one example for achieving improved cutting and holding capabilities, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0361] (Example: Central Clearance Space Specification) In this embodiment, a clearance space for attachment replacement is provided in the center of the support bracket 20. This embodiment has a configuration common to the above embodiment, but is an example that particularly facilitates improved compatibility and can be arbitrarily combined with other embodiments.

[0362] In this embodiment, the support bracket 20 is composed of a box-shaped frame and reinforcing ribs, and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the replacement attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the replacement attachment is replaced.

[0363] The cutting unit 30 comprises a cutting blade 32 driven by an electric or electro-hydraulic actuator and a receiving portion 34 facing it. When the cutting unit 30 is positioned outward to avoid interference with the attachment side wall, the main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support, and the support bracket 20, and the attachment to be replaced mainly performs the functions of guiding, holding, excavating, accumulating, or transporting.

[0364] The attachment to be replaced may be mounted using a configuration that primarily utilizes a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0365] In this embodiment, even when an attachment to be replaced is installed, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0366] Furthermore, with the attachment to be replaced removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0367] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0368] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0369] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the attachment to be replaced, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0370] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the attachment to be replaced, and that the main cutting load is received by the support bracket 20, can be maintained.

[0371] The configuration of the central clearance space specification described in this embodiment is just one example for achieving improved compatibility, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0372] (Example: Integrated support portion specification) In this embodiment, the support portion 34 is integrally formed with the housing of the support bracket 20 or the cutting unit 30. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to stabilize the load transmission path, and can be arbitrarily combined with other embodiments.

[0373] In this embodiment, the support bracket 20 is made of a welded steel plate and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the front work attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the front work attachment is replaced.

[0374] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic cylinder and a receiving portion 34 facing it. When rigidity is increased by welding, forging, casting, or integral machining, the main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support, and the support bracket 20, and the forward work attachment mainly performs the functions of guiding, holding, excavating, accumulating, or conveying.

[0375] The mounting of the forward work attachment can be based on a configuration using a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0376] In this embodiment, even when a forward work attachment is mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or bottom plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0377] Furthermore, with the front work attachment removed, the common base unit 12 can approach the object independently. When used without the attachment, a simple guide, temporary holding claw, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0378] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0379] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0380] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the front work attachment, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0381] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the front work attachment and that the main cutting load is received on the support bracket 20 side can be maintained.

[0382] The integrated mounting configuration of the receiving portion described in this embodiment is just one example for achieving stabilization of the load transmission path, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0383] (Example: Receiving part replaceable block specification) In this embodiment, the receiving part 34 is configured as a replaceable block. This embodiment has a configuration common to the above embodiment, but is an example that is particularly designed to make it easier to reduce maintenance costs, and can be arbitrarily combined with other embodiments.

[0384] In this embodiment, the support bracket 20 is made of cast steel or a forged member and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for application-specific attachments as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when application-specific attachments are replaced.

[0385] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic motor and a linkage mechanism, and a receiving portion 34 opposite to it. When only the worn receiving surface is replaced and the support bracket 20 is reused, the main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support, and the support bracket 20, and the application-specific attachments mainly perform the functions of guiding, holding, excavating, accumulating, or conveying.

[0386] The attachment for each application can be based on a configuration using the first mounting pin 71 and the second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0387] In this embodiment, even when application-specific attachments are mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0388] Furthermore, with the application-specific attachments removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0389] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0390] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0391] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting status of the application-specific attachment, the locking status, the holding force, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0392] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the application-specific attachments and that the main cutting load is received by the support bracket 20 can be maintained.

[0393] The configuration of the receiving part replacement block specification described in this embodiment is just one example for achieving a reduction in maintenance costs, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0394] (Example: Collaborative Receiver Specification) In this embodiment, a portion of the receiver 34 is placed on the common base unit 12 side, and the other portion is placed on the attachment side. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to obtain positional accuracy of the object, and can be arbitrarily combined with other embodiments.

[0395] In this embodiment, the support bracket 20 is composed of a box-shaped frame and reinforcing ribs, and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the replacement attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the replacement attachment is replaced.

[0396] The cutting unit 30 comprises a cutting blade 32 driven by an electric or electro-hydraulic actuator and a receiving portion 34 facing it. While the main reaction force is received on the support bracket 20 side, when a guide surface is provided on the attachment, the main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support, and the support bracket 20, and the attachment to be replaced mainly performs the functions of guiding, holding, excavating, accumulating, or transporting.

[0397] The attachment to be replaced may be mounted using a configuration that primarily utilizes a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0398] In this embodiment, even when an attachment to be replaced is installed, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0399] Furthermore, with the attachment to be replaced removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0400] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0401] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0402] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the attachment to be replaced, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0403] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the attachment to be replaced, and that the main cutting load is received by the support bracket 20, can be maintained.

[0404] The configuration of the receiving part collaborative specification described in this embodiment is just one example for achieving positioning accuracy of the object, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0405] (Example: Standard Rotating Blade Specification) In this embodiment, the cutting blade 32 is rotated around the pivot axis Ax. This embodiment has a configuration common to the above embodiment, but is an example that makes it particularly easy to obtain a strong shearing action, and can be arbitrarily combined with other embodiments.

[0406] In this embodiment, the support bracket 20 is made of a welded steel plate and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the front work attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the front work attachment is replaced.

[0407] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic cylinder and a receiving portion 34 opposite to it. When the cutting blade is pressed against the receiving portion 34 via the hydraulic cylinder or link, the main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support, and the support bracket 20, and the forward work attachment mainly performs the functions of guiding, holding, excavating, accumulating, or conveying.

[0408] The mounting of the forward work attachment can be based on a configuration using a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0409] In this embodiment, even when a forward work attachment is mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or bottom plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0410] Furthermore, with the front work attachment removed, the common base unit 12 can approach the object independently. When used without the attachment, a simple guide, temporary holding claw, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0411] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0412] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0413] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the front work attachment, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0414] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the front work attachment and that the main cutting load is received on the support bracket 20 side can be maintained.

[0415] The configuration of the standard rotating blade specifications described in this embodiment is just one example for achieving a powerful shearing action, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0416] (Example: Sliding blade specification) In this embodiment, the cutting blade 32 is slid along a straight or curved guide. This embodiment has a configuration common to the above embodiment, but is an example that particularly facilitates lower profile and layout flexibility, and can be arbitrarily combined with other embodiments.

[0417] In this embodiment, the support bracket 20 is made of cast steel or a forged member and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for application-specific attachments as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when application-specific attachments are replaced.

[0418] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic motor and a linkage mechanism, and a receiving part 34 facing it. When cutting or shearing without using a pivot shaft, the main cutting reaction force forms a closed loop through the receiving part 34, the pivot support, and the support bracket 20, and the application-specific attachments mainly perform the functions of guiding, holding, excavating, accumulating, or conveying.

[0419] The attachment for each application can be based on a configuration using the first mounting pin 71 and the second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0420] In this embodiment, even when application-specific attachments are mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0421] Furthermore, with the application-specific attachments removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0422] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0423] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0424] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting status of the application-specific attachment, the locking status, the holding force, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0425] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the application-specific attachments and that the main cutting load is received by the support bracket 20 can be maintained.

[0426] The configuration of the slide blade specifications described in this embodiment is just one example for achieving a low profile and layout flexibility, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0427] (Example: Rotating and sliding combined specification) In this embodiment, the cutting blade 32 combines rotational and sliding movements. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to suppress the escape of the target object, and can be arbitrarily combined with other embodiments.

[0428] In this embodiment, the support bracket 20 is composed of a box-shaped frame and reinforcing ribs, and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the replacement attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the replacement attachment is replaced.

[0429] The cutting unit 30 comprises a cutting blade 32 driven by an electric or electro-hydraulic actuator and a receiving portion 34 opposite to it. During initial entry, it rotates, and during final cutting, it presses linearly. The main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support, and the support bracket 20, and the replaceable attachment primarily performs the functions of guiding, holding, excavating, accumulating, or transporting.

[0430] The attachment to be replaced may be mounted using a configuration that primarily utilizes a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0431] In this embodiment, even when an attachment to be replaced is installed, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0432] Furthermore, with the attachment to be replaced removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0433] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0434] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0435] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the attachment to be replaced, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0436] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the attachment to be replaced, and that the main cutting load is received by the support bracket 20, can be maintained.

[0437] The configuration of the rotating slide composite specification described in this embodiment is just one example for achieving object escape suppression, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0438] (Example: Serrated blade specification) In this embodiment, the cutting blade 32 or the receiving portion 34 is provided with serrations, waves, steps, or fine irregularities. This embodiment has a configuration common to the above embodiment, but is an example that makes it particularly easy to obtain an anti-slip effect, and can be arbitrarily combined with other embodiments.

[0439] In this embodiment, the support bracket 20 is made of a welded steel plate and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the front work attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the front work attachment is replaced.

[0440] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic cylinder and a receiving part 34 opposite to it. When capturing fibrous materials, bamboo, bark, or slippery objects, the main cutting reaction force forms a closed loop through the receiving part 34, the pivot support, and the support bracket 20, and the forward work attachment mainly performs the functions of guiding, holding, excavating, accumulating, or conveying.

[0441] The mounting of the forward work attachment can be based on a configuration using a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0442] In this embodiment, even when a forward work attachment is mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or bottom plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0443] Furthermore, with the front work attachment removed, the common base unit 12 can approach the object independently. When used without the attachment, a simple guide, temporary holding claw, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0444] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0445] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0446] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the front work attachment, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0447] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the front work attachment and that the main cutting load is received on the support bracket 20 side can be maintained.

[0448] The serrated blade configuration described in this embodiment is just one example for achieving an anti-slip effect, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0449] (Example: Replaceable Tip Specification) In this embodiment, a replaceable tip is attached to the cutting edge of the cutting blade 32. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to maintain maintainability and cutting performance, and can be arbitrarily combined with other embodiments.

[0450] In this embodiment, the support bracket 20 is made of cast steel or a forged member and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for application-specific attachments as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when application-specific attachments are replaced.

[0451] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic motor and a linkage mechanism, and a receiving part 34 facing it. When only the worn part is replaced with a bolt, wedge, or pin, the main cutting reaction force forms a closed loop through the receiving part 34, the pivot support, and the support bracket 20, and the application-specific attachments mainly perform the functions of guiding, holding, excavating, accumulating, or conveying.

[0452] The attachment for each application can be based on a configuration using the first mounting pin 71 and the second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0453] In this embodiment, even when application-specific attachments are mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0454] Furthermore, with the application-specific attachments removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0455] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0456] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0457] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting status of the application-specific attachment, the locking status, the holding force, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0458] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the application-specific attachments and that the main cutting load is received by the support bracket 20 can be maintained.

[0459] The interchangeable tip configuration described in this embodiment is just one example for achieving maintainability and cutting performance, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0460] (Example: Shield Storage Specification) In this embodiment, the standby position of the cutting blade 32 is set inside the shield of the support bracket 20. This embodiment has a configuration common to the above embodiment, but is an example that makes it particularly easy to obtain safety and durability, and can be arbitrarily combined with other embodiments.

[0461] In this embodiment, the support bracket 20 is composed of a box-shaped frame and reinforcing ribs, and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the replacement attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the replacement attachment is replaced.

[0462] The cutting unit 30 comprises a cutting blade 32 driven by an electric or electro-hydraulic actuator and a receiving portion 34 facing it. When not in use, the cutting edge is covered to suppress collisions and foreign matter adhesion, and the main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support, and the support bracket 20, while the replaceable attachment mainly performs the functions of guiding, holding, excavating, accumulating, or transporting.

[0463] The attachment to be replaced may be mounted using a configuration that primarily utilizes a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0464] In this embodiment, even when an attachment to be replaced is installed, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0465] Furthermore, with the attachment to be replaced removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0466] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0467] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0468] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the attachment to be replaced, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0469] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the attachment to be replaced, and that the main cutting load is received by the support bracket 20, can be maintained.

[0470] The shield housing configuration described in this embodiment is just one example for achieving safety and durability, and the shape, materials, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0471] (Example: Hydraulic piping consolidation specification) In this embodiment, the hydraulic piping 80 and the connection port section 82 are consolidated on the support bracket 20 side. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to reduce the risk of contamination, and can be arbitrarily combined with other embodiments.

[0472] In this embodiment, the support bracket 20 is made of a welded steel plate and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the front work attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the front work attachment is replaced.

[0473] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic cylinder and a receiving part 34 opposite to it. When the piping of the cutting unit 30 is not disconnected during attachment replacement, the main cutting reaction force forms a closed loop through the receiving part 34, the pivot support, and the support bracket 20, and the forward work attachment mainly performs the functions of guiding, holding, excavating, accumulating, or conveying.

[0474] The mounting of the forward work attachment can be based on a configuration using a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0475] In this embodiment, even when a forward work attachment is mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or bottom plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0476] Furthermore, with the front work attachment removed, the common base unit 12 can approach the object independently. When used without the attachment, a simple guide, temporary holding claw, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0477] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0478] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0479] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the front work attachment, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0480] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the front work attachment and that the main cutting load is received on the support bracket 20 side can be maintained.

[0481] The configuration of the hydraulic piping cluster described in this embodiment is just one example of how to reduce contamination risk, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0482] (Example: Independent Hydraulic System Specification) In this embodiment, the hydraulic system of the cutting unit 30 and the hydraulic system of the attachment are separated. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to obtain operational stability, and can be arbitrarily combined with other embodiments.

[0483] In this embodiment, the support bracket 20 is made of cast steel or a forged member and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for application-specific attachments as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when application-specific attachments are replaced.

[0484] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic motor and a linkage mechanism, and a receiving section 34 opposite to it. To minimize the mutual influence of pressure fluctuations and insufficient flow rate, the main cutting reaction force forms a closed loop through the receiving section 34, the pivot support, and the support bracket 20, while application-specific attachments primarily perform the functions of guiding, holding, excavating, accumulating, or conveying.

[0485] The attachment for each application can be based on a configuration using the first mounting pin 71 and the second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0486] In this embodiment, even when application-specific attachments are mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0487] Furthermore, with the application-specific attachments removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0488] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0489] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0490] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting status of the application-specific attachment, the locking status, the holding force, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0491] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the application-specific attachments and that the main cutting load is received by the support bracket 20 can be maintained.

[0492] The configuration of the independent hydraulic system described in this embodiment is just one example for achieving operational stability, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0493] (Example: Pressure Sensor Control Specification) In this embodiment, the drive pressure of the cutting unit 30 is monitored by a pressure sensor. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to suppress overload, and can be arbitrarily combined with other embodiments.

[0494] In this embodiment, the support bracket 20 is composed of a box-shaped frame and reinforcing ribs, and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the replacement attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the replacement attachment is replaced.

[0495] The cutting unit 30 comprises a cutting blade 32 driven by an electric or electro-hydraulic actuator and a receiving portion 34 facing it. When adjusting the speed, pressure, or stopping conditions according to the cutting load, the main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support, and the support bracket 20, and the replaceable attachment mainly performs the functions of guiding, holding, excavating, accumulating, or conveying.

[0496] The attachment to be replaced may be mounted using a configuration that primarily utilizes a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0497] In this embodiment, even when an attachment to be replaced is installed, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0498] Furthermore, with the attachment to be replaced removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0499] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0500] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0501] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the attachment to be replaced, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0502] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the attachment to be replaced, and that the main cutting load is received by the support bracket 20, can be maintained.

[0503] The configuration of the pressure sensor control specifications described in this embodiment is just one example for achieving overload suppression, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0504] (Example: Attachment Recognition Specification) In this embodiment, an attachment identification unit is provided on the support bracket 20. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to obtain automatic selection of control conditions, and can be arbitrarily combined with other embodiments.

[0505] In this embodiment, the support bracket 20 is made of a welded steel plate and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the front work attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the front work attachment is replaced.

[0506] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic cylinder and a receiving part 34 facing it. When determining the type using RFID, magnetism, contacts, a camera, or a mechanical key, the main cutting reaction force forms a closed loop through the receiving part 34, the pivot support, and the support bracket 20, and the forward work attachment mainly performs the functions of guiding, holding, excavating, accumulating, or transporting.

[0507] The mounting of the forward work attachment can be based on a configuration using a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0508] In this embodiment, even when a forward work attachment is mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or bottom plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0509] Furthermore, with the front work attachment removed, the common base unit 12 can approach the object independently. When used without the attachment, a simple guide, temporary holding claw, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0510] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0511] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0512] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the front work attachment, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0513] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the front work attachment and that the main cutting load is received on the support bracket 20 side can be maintained.

[0514] The attachment recognition specification configuration described in this embodiment is just one example for achieving automatic selection of control conditions, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0515] (Example: Holding detection specification) In this embodiment, a holding force detection unit is provided on the grapple 60 or other holding device. This embodiment has a configuration common to the above embodiment, but is an example that makes it particularly easy to suppress malfunctions, and can be arbitrarily combined with other embodiments.

[0516] In this embodiment, the support bracket 20 is made of cast steel or a forged member and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for application-specific attachments as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when application-specific attachments are replaced.

[0517] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic motor and a linkage mechanism, and a receiving portion 34 facing it. When the cutting unit 30 is activated after the workpiece W is stably held, the main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support, and the support bracket 20, and the application-specific attachments mainly perform the functions of guiding, holding, excavating, accumulating, or conveying.

[0518] The attachment for each application can be based on a configuration using the first mounting pin 71 and the second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0519] In this embodiment, even when application-specific attachments are mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0520] Furthermore, with the application-specific attachments removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0521] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0522] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0523] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting status of the application-specific attachment, the locking status, the holding force, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0524] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the application-specific attachments and that the main cutting load is received by the support bracket 20 can be maintained.

[0525] The configuration of the holding detection specification described in this embodiment is just one example for achieving malfunction suppression, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0526] (Example: Step-back control specification) In this embodiment, the cutting blade 32 is slightly retracted when an overload is detected. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to avoid jamming and stopping, and can be arbitrarily combined with other embodiments.

[0527] In this embodiment, the support bracket 20 is composed of a box-shaped frame and reinforcing ribs, and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the replacement attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the replacement attachment is replaced.

[0528] The cutting unit 30 comprises a cutting blade 32 driven by an electric or electro-hydraulic actuator and a receiving portion 34 facing it. When transitioning to another push cut or pulse cut, the main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support, and the support bracket 20, and the replaceable attachment mainly performs the functions of guiding, holding, excavating, accumulating, or conveying.

[0529] The attachment to be replaced may be mounted using a configuration that primarily utilizes a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0530] In this embodiment, even when an attachment to be replaced is installed, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0531] Furthermore, with the attachment to be replaced removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0532] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0533] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0534] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the attachment to be replaced, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0535] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the attachment to be replaced, and that the main cutting load is received by the support bracket 20, can be maintained.

[0536] The step-back control configuration described in this embodiment is just one example of how to avoid jamming and stopping, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0537] (Example: Temperature Compensation Specification) This embodiment includes a temperature sensor for monitoring the hydraulic oil temperature or motor temperature. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to obtain stability, especially during continuous operation, and can be arbitrarily combined with other embodiments.

[0538] In this embodiment, the support bracket 20 is made of a welded steel plate and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the front work attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the front work attachment is replaced.

[0539] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic cylinder and a receiving part 34 facing it. When adjusting the speed, rest time, or pressure during temperature rise, the main cutting reaction force forms a closed loop through the receiving part 34, the pivot support, and the support bracket 20, and the forward work attachment primarily performs the functions of guiding, holding, excavating, accumulating, or conveying.

[0540] The mounting of the forward work attachment can be based on a configuration using a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0541] In this embodiment, even when a forward work attachment is mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or bottom plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0542] Furthermore, with the front work attachment removed, the common base unit 12 can approach the object independently. When used without the attachment, a simple guide, temporary holding claw, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0543] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0544] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0545] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the front work attachment, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0546] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the front work attachment and that the main cutting load is received on the support bracket 20 side can be maintained.

[0547] The temperature compensation configuration described in this embodiment is just one example for achieving stability during continuous operation, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0548] (Example: Blade chipping detection specification) In this embodiment, abnormal vibrations are detected by an AE sensor or an acceleration sensor. This embodiment has a configuration common to the above embodiment, but is an example that is particularly designed to facilitate preventive maintenance, and can be arbitrarily combined with other embodiments.

[0549] In this embodiment, the support bracket 20 is made of cast steel or a forged member and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for application-specific attachments as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when application-specific attachments are replaced.

[0550] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic motor and a linkage mechanism, and a receiving portion 34 facing it. When estimating chipping of the blade tip, bearing wear, or loosening, the main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support, and the support bracket 20, and the application-specific attachments mainly perform the functions of guiding, holding, excavating, accumulating, or conveying.

[0551] The attachment for each application can be based on a configuration using the first mounting pin 71 and the second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0552] In this embodiment, even when application-specific attachments are mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0553] Furthermore, with the application-specific attachments removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0554] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0555] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0556] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting status of the application-specific attachment, the locking status, the holding force, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0557] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the application-specific attachments and that the main cutting load is received by the support bracket 20 can be maintained.

[0558] The configuration of the blade chipping detection specification described in this embodiment is just one example for achieving preventive maintenance, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0559] (Example: Safety Barrier Specification) In this embodiment, a safety monitoring area is set around the cutting area. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to obtain safety, especially when used without attachment, and can be arbitrarily combined with other embodiments.

[0560] In this embodiment, the support bracket 20 is composed of a box-shaped frame and reinforcing ribs, and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the replacement attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the replacement attachment is replaced.

[0561] The cutting unit 30 comprises a cutting blade 32 driven by an electric or electro-hydraulic actuator and a receiving portion 34 facing it. When detecting an intruder using infrared, ultrasonic, camera, or LiDAR, the main cutting reaction force forms a closed loop through the receiving portion 34, pivot support, and support bracket 20, and the replaceable attachment primarily performs the functions of guiding, holding, excavating, accumulating, or transporting.

[0562] The attachment to be replaced may be mounted using a configuration that primarily utilizes a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0563] In this embodiment, even when an attachment to be replaced is installed, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0564] Furthermore, with the attachment to be replaced removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0565] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0566] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0567] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the attachment to be replaced, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0568] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the attachment to be replaced, and that the main cutting load is received by the support bracket 20, can be maintained.

[0569] The safety barrier configuration described in this embodiment is just one example of how to achieve safety when the barrier is not attached, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0570] (Example: Image Recognition Specification) In this embodiment, the position and shape of the object are recognized by the imaging unit or the distance measuring unit. This embodiment has a configuration common to the above embodiment, but is an example that makes it particularly easy to improve work accuracy, and can be arbitrarily combined with other embodiments.

[0571] In this embodiment, the support bracket 20 is made of a welded steel plate and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the front work attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the front work attachment is replaced.

[0572] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic cylinder and a receiving part 34 opposite to it. When calculating the cutting line, gripping position, or arm posture, the main cutting reaction force forms a closed loop through the receiving part 34, pivot support, and support bracket 20, and the forward work attachment mainly performs the functions of guiding, holding, excavating, accumulating, or conveying.

[0573] The mounting of the forward work attachment can be based on a configuration using a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0574] In this embodiment, even when a forward work attachment is mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or bottom plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0575] Furthermore, with the front work attachment removed, the common base unit 12 can approach the object independently. When used without the attachment, a simple guide, temporary holding claw, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0576] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0577] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0578] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the front work attachment, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0579] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the front work attachment and that the main cutting load is received on the support bracket 20 side can be maintained.

[0580] The image recognition specification configuration described in this embodiment is just one example for achieving improved work accuracy, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0581] (Example: Remote Control Specification) In this embodiment, the work device 10 can be operated from a remote control terminal. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to perform work, especially in hazardous locations, and can be arbitrarily combined with other embodiments.

[0582] In this embodiment, the support bracket 20 is made of cast steel or a forged member and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for application-specific attachments as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when application-specific attachments are replaced.

[0583] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic motor and a linkage mechanism, and a receiving section 34 opposite it. When transmitting video, pressure, angle, and safety status to the operator, the main cutting reaction force forms a closed loop through the receiving section 34, pivot support, and support bracket 20, and application-specific attachments primarily perform guiding, holding, excavating, stacking, or conveying functions.

[0584] The attachment for each application can be based on a configuration using the first mounting pin 71 and the second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0585] In this embodiment, even when application-specific attachments are mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0586] Furthermore, with the application-specific attachments removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0587] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0588] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0589] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting status of the application-specific attachment, the locking status, the holding force, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0590] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the application-specific attachments and that the main cutting load is received by the support bracket 20 can be maintained.

[0591] The remote control configuration described in this embodiment is just one example for enabling work in hazardous environments, and the shape, materials, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0592] (Example: Autonomous Operation Specification) In this embodiment, the work vehicle or device-side controller performs an automatic approach. This embodiment has a configuration common to the above embodiment, but is an example that is particularly designed to easily reduce the workload, and can be arbitrarily combined with other embodiments.

[0593] In this embodiment, the support bracket 20 is composed of a box-shaped frame and reinforcing ribs, and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the replacement attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the replacement attachment is replaced.

[0594] The cutting unit 30 comprises a cutting blade 32 driven by an electric or electro-hydraulic actuator and a receiving part 34 facing it. When gripping, cutting, and transporting an object is performed semi-automatically or automatically, the main cutting reaction force forms a closed loop through the receiving part 34, the pivot support, and the support bracket 20, and the interchangeable attachment mainly performs the functions of guiding, holding, excavating, accumulating, or transporting.

[0595] The attachment to be replaced may be mounted using a configuration that primarily utilizes a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0596] In this embodiment, even when an attachment to be replaced is installed, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0597] Furthermore, with the attachment to be replaced removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0598] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0599] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0600] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the attachment to be replaced, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0601] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the attachment to be replaced, and that the main cutting load is received by the support bracket 20, can be maintained.

[0602] The autonomous work specification configuration described in this embodiment is just one example of how to reduce the workload, and the shape, materials, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0603] (Example: Electric Actuator Specification) In this embodiment, the cutting blade 32 or the locking mechanism is driven by an electric actuator. This embodiment has a configuration common to the above embodiment, but is an example that makes it particularly easy to achieve electrification, and can be arbitrarily combined with other embodiments.

[0604] In this embodiment, the support bracket 20 is made of a welded steel plate and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the front work attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the front work attachment is replaced.

[0605] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic cylinder and a receiving part 34 facing it. When applied to vehicles or electric construction machines with a small hydraulic power source, the main cutting reaction force forms a closed loop through the receiving part 34, the pivot support, and the support bracket 20, and the forward work attachment mainly performs the functions of guiding, holding, excavating, accumulating, or transporting.

[0606] The mounting of the forward work attachment can be based on a configuration using a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0607] In this embodiment, even when a forward work attachment is mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or bottom plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0608] Furthermore, with the front work attachment removed, the common base unit 12 can approach the object independently. When used without the attachment, a simple guide, temporary holding claw, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0609] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0610] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0611] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the front work attachment, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0612] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the front work attachment and that the main cutting load is received on the support bracket 20 side can be maintained.

[0613] The configuration of the electric actuator specifications described in this embodiment is just one example for achieving electrification, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0614] (Example: Electric-Hydraulic Combined Specification) In this embodiment, the electric pump and hydraulic cylinder are built into a common base unit 12. This embodiment has a configuration common to the above embodiment, but is an example that particularly facilitates improved vehicle compatibility, and can be arbitrarily combined with other embodiments.

[0615] In this embodiment, the support bracket 20 is made of cast steel or a forged member and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for application-specific attachments as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when application-specific attachments are replaced.

[0616] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic motor and a linkage mechanism, and a receiving part 34 facing it. When performing a cutting operation using only power from the vehicle, the main cutting reaction force forms a closed loop through the receiving part 34, the pivot support, and the support bracket 20, and the application-specific attachments mainly perform the functions of guiding, holding, excavating, accumulating, or conveying.

[0617] The attachment for each application can be based on a configuration using the first mounting pin 71 and the second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0618] In this embodiment, even when application-specific attachments are mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0619] Furthermore, with the application-specific attachments removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0620] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0621] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0622] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting status of the application-specific attachment, the locking status, the holding force, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0623] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the application-specific attachments and that the main cutting load is received by the support bracket 20 can be maintained.

[0624] The electro-hydraulic combined configuration described in this embodiment is just one example for improving vehicle compatibility, and the shape, materials, drive system, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0625] (Example: Common Swivel Section Specification) In this embodiment, the swivel section is provided on the common base unit 12 side. This embodiment has a configuration common to the above embodiment, but is an example that particularly facilitates the simplification of attachments, and can be arbitrarily combined with other embodiments.

[0626] In this embodiment, the support bracket 20 is composed of a box-shaped frame and reinforcing ribs, and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the replacement attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the replacement attachment is replaced.

[0627] The cutting unit 30 comprises a cutting blade 32 driven by an electric or electro-hydraulic actuator and a receiving portion 34 facing it. When using the same swivel structure regardless of the type of forward work attachment, the main cutting reaction force forms a closed loop through the receiving portion 34, pivot support, and support bracket 20, and the attachment to be replaced mainly performs the functions of guiding, holding, excavating, accumulating, or transporting.

[0628] The attachment to be replaced may be mounted using a configuration that primarily utilizes a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0629] In this embodiment, even when an attachment to be replaced is installed, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0630] Furthermore, with the attachment to be replaced removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0631] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0632] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0633] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the attachment to be replaced, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0634] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the attachment to be replaced, and that the main cutting load is received by the support bracket 20, can be maintained.

[0635] The configuration of the common swivel section described in this embodiment is just one example for achieving attachment simplification, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0636] (Example: Tilt Mechanism Specification) In this embodiment, the cutting unit 30 or the common base unit 12 is made tiltable. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to adapt to slope or pruning work in particular, and can be arbitrarily combined with other embodiments.

[0637] In this embodiment, the support bracket 20 is made of a welded steel plate and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the front work attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the front work attachment is replaced.

[0638] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic cylinder and a receiving part 34 opposite to it. When adjusting the cutting surface angle independently of the attachment position, the main cutting reaction force forms a closed loop through the receiving part 34, the pivot support, and the support bracket 20, and the forward work attachment mainly performs the functions of guiding, holding, excavating, accumulating, or conveying.

[0639] The mounting of the forward work attachment can be based on a configuration using a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0640] In this embodiment, even when a forward work attachment is mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or bottom plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0641] Furthermore, with the front work attachment removed, the common base unit 12 can approach the object independently. When used without the attachment, a simple guide, temporary holding claw, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0642] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0643] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0644] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the front work attachment, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0645] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the front work attachment and that the main cutting load is received on the support bracket 20 side can be maintained.

[0646] The tilt mechanism configuration described in this embodiment is just one example for adapting to slope or pruning work, and the shape, materials, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0647] (Example: Cushion support specification) In this embodiment, a damper or elastic support is provided between the cutting unit 30 and the support bracket 20. This embodiment has a configuration common to the above embodiment, but is an example that particularly facilitates protection of the arm and bearing, and can be arbitrarily combined with other embodiments.

[0648] In this embodiment, the support bracket 20 is made of cast steel or a forged member and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for application-specific attachments as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when application-specific attachments are replaced.

[0649] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic motor and a linkage mechanism, and a receiving portion 34 facing it. When mitigating the peak of the cutting reaction force, the main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support, and the support bracket 20, and the application-specific attachments mainly perform the functions of guiding, holding, excavating, accumulating, or conveying.

[0650] The attachment for each application can be based on a configuration using the first mounting pin 71 and the second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0651] In this embodiment, even when application-specific attachments are mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0652] Furthermore, with the application-specific attachments removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0653] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0654] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0655] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting status of the application-specific attachment, the locking status, the holding force, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0656] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the application-specific attachments and that the main cutting load is received by the support bracket 20 can be maintained.

[0657] The cushioning support configuration described in this embodiment is just one example for achieving protection of the arm and bearing, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0658] (Example: Load-transferring rib specification) In this embodiment, reinforcing ribs, box-shaped beams, or trusses are provided within the support bracket 20. This embodiment has a configuration common to the above embodiment, but is an example that makes it particularly easy to ensure rigidity, and can be arbitrarily combined with other embodiments.

[0659] In this embodiment, the support bracket 20 is composed of a box-shaped frame and reinforcing ribs, and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the replacement attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the replacement attachment is replaced.

[0660] The cutting unit 30 comprises a cutting blade 32 driven by an electric or electro-hydraulic actuator and a receiving portion 34 facing it. When the receiving portion 34 and the drive cylinder support portion are connected by a load path, the main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support portion and the support bracket 20, and the replaceable attachment mainly performs the functions of guiding, holding, excavating, accumulating, or transporting.

[0661] The attachment to be replaced may be mounted using a configuration that primarily utilizes a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0662] In this embodiment, even when an attachment to be replaced is installed, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0663] Furthermore, with the attachment to be replaced removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0664] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0665] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0666] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the attachment to be replaced, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0667] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the attachment to be replaced, and that the main cutting load is received by the support bracket 20, can be maintained.

[0668] The load-transmission rib configuration described in this embodiment is just one example of how to ensure rigidity, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0669] (Example: Lightweight lattice specification) In this embodiment, a hollow section, a weight-reducing section, or a lattice-shaped reinforcement is formed in the support bracket 20. This embodiment has a configuration common to the above embodiment, but is an example that particularly facilitates the reduction of the burden on the work vehicle, and can be arbitrarily combined with other embodiments.

[0670] In this embodiment, the support bracket 20 is made of a welded steel plate and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the front work attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the front work attachment is replaced.

[0671] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic cylinder and a receiving part 34 opposite to it. When reducing weight while maintaining rigidity, the main cutting reaction force forms a closed loop through the receiving part 34, the pivot support, and the support bracket 20, and the forward work attachment mainly performs the functions of guiding, holding, excavating, accumulating, or conveying.

[0672] The mounting of the forward work attachment can be based on a configuration using a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0673] In this embodiment, even when a forward work attachment is mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or bottom plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0674] Furthermore, with the front work attachment removed, the common base unit 12 can approach the object independently. When used without the attachment, a simple guide, temporary holding claw, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0675] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0676] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0677] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the front work attachment, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0678] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the front work attachment and that the main cutting load is received on the support bracket 20 side can be maintained.

[0679] The lightweight grid configuration described in this embodiment is just one example of how to reduce the burden on the work vehicle, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0680] (Example: Protective Guard Specification) In this embodiment, the guard is placed on the outside of the cutting unit 30 or on the attachment side. This embodiment has a configuration common to the above embodiment, but is an example that makes it particularly easy to obtain safety and durability, and can be arbitrarily combined with other embodiments.

[0681] In this embodiment, the support bracket 20 is made of cast steel or a forged member and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for application-specific attachments as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when application-specific attachments are replaced.

[0682] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic motor and a linkage mechanism, and a receiving portion 34 facing it. To suppress contact with surrounding members, pipes, or workers, the main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support, and the support bracket 20, and the application-specific attachments mainly perform the functions of guiding, holding, excavating, accumulating, or conveying.

[0683] The attachment for each application can be based on a configuration using the first mounting pin 71 and the second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0684] In this embodiment, even when application-specific attachments are mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0685] Furthermore, with the application-specific attachments removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0686] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0687] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0688] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting status of the application-specific attachment, the locking status, the holding force, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0689] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the application-specific attachments and that the main cutting load is received by the support bracket 20 can be maintained.

[0690] The protective guard configuration described in this embodiment is just one example for achieving safety and durability, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0691] (Example: Air blow cleaning specification) In this embodiment, compressed air is sprayed toward the cutting edge or the receiving portion 34. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to maintain cutting performance, and can be arbitrarily combined with other embodiments.

[0692] In this embodiment, the support bracket 20 is composed of a box-shaped frame and reinforcing ribs, and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the replacement attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the replacement attachment is replaced.

[0693] The cutting unit 30 comprises a cutting blade 32 driven by an electric or electro-hydraulic actuator and a receiving part 34 facing it. When removing wood chips, soil, sap, or dust, the main cutting reaction force forms a closed loop through the receiving part 34, the pivot support, and the support bracket 20, and the replaceable attachment mainly performs the functions of guiding, holding, excavating, accumulating, or conveying.

[0694] The attachment to be replaced may be mounted using a configuration that primarily utilizes a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0695] In this embodiment, even when an attachment to be replaced is installed, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0696] Furthermore, with the attachment to be replaced removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0697] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0698] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0699] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the attachment to be replaced, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0700] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the attachment to be replaced, and that the main cutting load is received by the support bracket 20, can be maintained.

[0701] The air blow cleaning configuration described in this embodiment is just one example for maintaining cutting performance, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0702] (Example: Coolant cleaning specification) In this embodiment, water, cleaning solution, or mist is supplied to the cutting edge. This embodiment has a configuration common to the above embodiment, but is an example that makes it particularly easy to obtain improved wear resistance, and can be arbitrarily combined with other embodiments.

[0703] In this embodiment, the support bracket 20 is made of a welded steel plate and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the front work attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the front work attachment is replaced.

[0704] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic cylinder and a receiving part 34 facing it. When suppressing cutting heat and deposits, the main cutting reaction force forms a closed loop through the receiving part 34, the pivot support, and the support bracket 20, and the forward work attachment mainly performs the functions of guiding, holding, excavating, accumulating, or conveying.

[0705] The mounting of the forward work attachment can be based on a configuration using a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0706] In this embodiment, even when a forward work attachment is mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or bottom plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0707] Furthermore, with the front work attachment removed, the common base unit 12 can approach the object independently. When used without the attachment, a simple guide, temporary holding claw, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0708] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0709] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0710] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the front work attachment, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0711] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the front work attachment and that the main cutting load is received on the support bracket 20 side can be maintained.

[0712] The coolant cleaning configuration described in this embodiment is just one example for achieving improved wear resistance, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0713] (Example: Lubrication Specification) In this embodiment, an automatic lubrication unit is provided on the rotating shaft Ax or the pin boss portion. This embodiment has a configuration common to the above embodiment, but is an example that makes it particularly easy to improve bearing life, and can be arbitrarily combined with other embodiments.

[0714] In this embodiment, the support bracket 20 is made of cast steel or a forged member and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for application-specific attachments as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when application-specific attachments are replaced.

[0715] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic motor and a linkage mechanism, and a receiving part 34 facing it. When lubricant is supplied according to the usage time or number of operations, the main cutting reaction force forms a closed loop through the receiving part 34, the pivot support, and the support bracket 20, and the application-specific attachments mainly perform the functions of guiding, holding, excavating, accumulating, or conveying.

[0716] The attachment for each application can be based on a configuration using the first mounting pin 71 and the second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0717] In this embodiment, even when application-specific attachments are mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0718] Furthermore, with the application-specific attachments removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0719] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0720] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0721] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting status of the application-specific attachment, the locking status, the holding force, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0722] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the application-specific attachments and that the main cutting load is received by the support bracket 20 can be maintained.

[0723] The lubrication and lubrication configuration described in this embodiment is just one example for improving bearing life, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0724] (Example: Dustproof seal specification) In this embodiment, a sealing member is provided on the pivot shaft Ax, slide guide, or coupler. This embodiment has a configuration common to the above embodiment, but is an example that makes it easier to adapt to particularly harsh environments, and can be arbitrarily combined with other embodiments.

[0725] In this embodiment, the support bracket 20 is composed of a box-shaped frame and reinforcing ribs, and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the replacement attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the replacement attachment is replaced.

[0726] The cutting unit 30 comprises a cutting blade 32 driven by an electric or electro-hydraulic actuator and a receiving portion 34 facing it. When suppressing the intrusion of mud, water, wood chips, or dust, the main cutting reaction force forms a closed loop through the receiving portion 34, the pivot support, and the support bracket 20, and the replaceable attachment mainly performs the functions of guiding, holding, excavating, accumulating, or conveying.

[0727] The attachment to be replaced may be mounted using a configuration that primarily utilizes a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0728] In this embodiment, even when an attachment to be replaced is installed, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0729] Furthermore, with the attachment to be replaced removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0730] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0731] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0732] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the attachment to be replaced, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0733] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the attachment to be replaced, and that the main cutting load is received by the support bracket 20, can be maintained.

[0734] The dustproof seal configuration described in this embodiment is just one example for achieving adaptation to harsh environments, and the shape, materials, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0735] (Example: Piping Protection Specification) In this embodiment, the hydraulic piping 80 is arranged inside a cover, duct, or frame. This embodiment has a configuration common to the above embodiment, but is an example that particularly facilitates the reduction of the risk of oil leakage, and can be arbitrarily combined with other embodiments.

[0736] In this embodiment, the support bracket 20 is made of a welded steel plate and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for the front work attachment as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when the front work attachment is replaced.

[0737] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic cylinder and a receiving part 34 opposite to it. When protecting the piping from impact during attachment replacement and cutting, the main cutting reaction force forms a closed loop through the receiving part 34, pivot support, and support bracket 20, and the forward work attachment mainly performs the functions of guiding, holding, excavating, accumulating, or transporting.

[0738] The mounting of the forward work attachment can be based on a configuration using a first mounting pin 71 and a second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0739] In this embodiment, even when a forward work attachment is mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or bottom plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0740] Furthermore, with the front work attachment removed, the common base unit 12 can approach the object independently. When used without the attachment, a simple guide, temporary holding claw, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0741] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0742] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0743] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting state, lock state, holding force of the front work attachment, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0744] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the front work attachment and that the main cutting load is received on the support bracket 20 side can be maintained.

[0745] The configuration of the piping protection specifications described in this embodiment is just one example of how to reduce the risk of oil leakage, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the scope of the claims to a specific illustrated shape or a specific work application.

[0746] (Example: Locking Mechanism Specification) In this embodiment, the front work attachment is secured with a locking pin, hook, or wedge. This embodiment has a configuration common to the above embodiment, but is an example that particularly facilitates preventing detachment, and can be arbitrarily combined with other embodiments.

[0747] In this embodiment, the support bracket 20 is made of cast steel or a forged member and may have a pivot point for the cutting blade 32, a support point for the receiving part 34, and a mounting point for application-specific attachments as independent load transmission parts. This allows the basic support relationship of the cutting unit 30 to be maintained even when application-specific attachments are replaced.

[0748] The cutting unit 30 comprises a cutting blade 32 driven by a hydraulic motor and a linkage mechanism, and a receiving part 34 facing it. When the completion of mounting is confirmed by a sensor or display, the main cutting reaction force forms a closed loop through the receiving part 34, the pivot support, and the support bracket 20, and the application-specific attachments mainly perform the functions of guiding, holding, excavating, accumulating, or conveying.

[0749] The attachment for each application can be based on a configuration using the first mounting pin 71 and the second mounting pin 72, but auxiliary hooks, wedges, bolts, sliding engagement parts, hydraulic locks, or positioning projections may also be used in combination. The number of pins or the specifications of the pins can be changed as long as it does not impair the independent support structure of the cutting unit 30.

[0750] In this embodiment, even when application-specific attachments are mounted, the necessary clearance can be provided between the movable range of the cutting blade 32 and the side wall, claw portion, gripping portion, or base plate of the attachment. This clearance is not limited to a fixed value and may be adjusted by a spacer, adapter, or position adjustment mechanism.

[0751] Furthermore, with the application-specific attachments removed, the common base unit 12 can approach the object on its own. When used without attachments, a simple guide, temporary holding claws, anti-tipping member, or protective cover may be attached to the front or side of the cutting unit 30.

[0752] In this embodiment, the hydraulic piping 80, electrical wiring, sensor wiring, or communication wiring can be arranged inside the support bracket 20, in the outer groove, in the protective duct, or inside the detachable cover. This reduces the number of connection points when replacing attachments and can suppress pipe damage, forgotten connections, or contamination by foreign objects.

[0753] Furthermore, the cutting blade 32, receiving portion 34, bearing, bush, seal, tip, or guard may be configured as replaceable consumable parts depending on the operating environment. These parts can be maintained by replacing them individually, replacing the entire cassette, or replacing the entire cutting unit 30.

[0754] In the control according to this embodiment, the conditions for allowing the cutting unit 30 to operate may be set based on the mounting status of the application-specific attachment, the locking status, the holding force, the angle of the cutting blade 32, the hydraulic pressure, or the state of the safety monitoring area. This allows for manual, semi-automatic, and automatic operation modes.

[0755] In a modified version of this embodiment, the cutting unit 30 can be positioned to the left, right, upper, lower, or diagonally. Even if the positioning direction is changed, the basic idea that the cutting unit 30 is structurally or functionally independent from the application-specific attachments and that the main cutting load is received by the support bracket 20 can be maintained.

[0756] The locking mechanism configuration described in this embodiment is just one example for preventing detachment, and the shape, material, drive method, mounting method, control method, and maintenance method can be changed as appropriate. Therefore, this embodiment does not limit the claims to a specific illustrated shape or a specific work application.

[0757] (Example: Multi-coupler specification) In this embodiment, hydraulic connections, electrical connections, and communication connections are attached and detached integrally. This embodiment has a configuration common to the above embodiment, but is an example that particularly facilitates replacement work, and can be arbitrarily combined with other embodiments.

[0758] In this embodiment, the support bracket 20 is composed of a box-shaped frame...

Claims

1. A support bracket connected to the arm of the work vehicle, A cutting unit having a rotatable cutting blade supported by the support bracket and a receiving portion facing the cutting blade, A forward work attachment that is detachably mounted to the support bracket, Equipped with, The aforementioned forward work attachment is positioned in front of the cutting unit and is constructed separately from the cutting unit. The cutting unit is configured to operate even when the front work attachment is not attached. The primary cutting reaction force generated by the driving of the cutting blade is supported so as to be received on the support bracket side without passing through the front work attachment as the primary load transmission member. The cutting unit is positioned offset to one side in the left-right direction of the support bracket, and the cutting blade rotates in an area outside or away from the side wall of the front work attachment. Work equipment.

2. A work apparatus according to claim 1, The forward work attachment is interchangeably connected to the support bracket via two pins. The pin shaft for mounting the forward work attachment and the rotation axis of the cutting blade are positioned at different locations. Work equipment.

3. The work apparatus according to claim 2, The forward work attachment includes at least one selected from a bucket, a rake, and a grapple. The mounting specifications for the two pins have been standardized across different types of forward work attachments. Work equipment.

4. A work apparatus according to claim 1, In the state where the forward work attachment is not attached, the object to be cut is configured to be sheared between the cutting blade and the receiving portion. Work equipment.

5. A support bracket connected to the arm of a work vehicle, A cutting unit having a rotatable cutting blade supported by the support bracket and a receiving portion facing the cutting blade, A forward work attachment that is detachably mounted to the support bracket, Equipped with, The aforementioned forward work attachment is positioned in front of the cutting unit and is constructed separately from the cutting unit. The cutting unit is configured to operate even when the front work attachment is not attached. The primary cutting reaction force generated by the driving of the cutting blade is supported so as to be received on the support bracket side without passing through the front work attachment as the primary load transmission member. The cutting blade has multiple cutting edges that act in multiple directions, The aforementioned multiple cutting edges are A first cutting edge capable of cutting through entry, A second cutting blade that can assist in cutting through the material, A third cutting edge capable of suppressing the escape of the workpiece or breaking off remaining fibers, including, Work equipment.

6. The work apparatus according to claim 5, The cutting unit is positioned offset to one side in the left-right direction of the support bracket, and the cutting blade rotates in an area outside or away from the side wall of the front work attachment. Work equipment.

7. The work apparatus according to claim 5, In the state where the forward work attachment is not attached, the object to be cut is configured to be sheared between the cutting blade and the receiving portion. Work equipment.

8. A support bracket connected to the arm of a work vehicle, A cutting unit having a rotatable cutting blade supported by the support bracket and a receiving portion facing the cutting blade, A forward work attachment that is detachably mounted to the support bracket, Equipped with, The aforementioned forward work attachment is positioned in front of the cutting unit and is constructed separately from the cutting unit. The cutting unit is configured to operate even when the front work attachment is not attached. The primary cutting reaction force generated by the driving of the cutting blade is supported so as to be received on the support bracket side without passing through the front work attachment as the primary load transmission member. The support bracket includes a lower bracket that is configured separately from the forward work attachment. The lower bracket has a pair of side plates spaced apart from each other, and a first pin insertion hole and a second pin insertion hole provided in the pair of side plates. The forward work attachment has mounting tabs corresponding to the first pin insertion hole and the second pin insertion hole, The first mounting pin passes through the first pin insertion hole and the mounting tab, and the second mounting pin passes through the second pin insertion hole and the mounting tab, thereby detachably connecting the front work attachment to the lower bracket. The receiving portion or pivot support portion of the cutting unit is supported by the lower bracket or the support bracket, The aforementioned main cutting reaction force is transmitted to the support bracket side via the lower bracket. Work equipment.

9. A work apparatus according to claim 8, The aforementioned forward work attachment includes a bucket, A gap or clearance is provided between the main body of the bucket and the lower bracket, so that even when the bucket is removed from the lower bracket, the lower bracket and the cutting unit remain on the support bracket side. Work equipment.

10. A work apparatus according to claim 8, The cutting unit, the receiving portion, the pivot support portion of the cutting blade, and at least a portion of the hydraulic piping for supplying hydraulic fluid to the cutting unit are concentrated and supported or held on the lower bracket side. Even after replacing the aforementioned forward work attachment, the basic configuration and support relationship of the cutting unit are maintained. Work equipment.

11. A work apparatus according to claim 8, The aforementioned forward work attachment is selected from a group of interchangeable work tools that include at least two types of work tools, including a bucket and a grapple, and may further include a rake. Each of the work tools included in the group of work tools to be replaced is attached to the lower bracket using the same or interchangeable two-pin mounting method. Work equipment.

12. A work apparatus according to claim 11, At least one of the replacement tools comprises a tool body and mounting lugs corresponding to the first mounting pin and the second mounting pin, With the mounting tabs positioned between or near the side plates of the lower bracket, the work tool body is detachably connected to the lower bracket. Work equipment.

13. A work apparatus according to claim 8, The lower bracket has a side plate positioned on one or both sides of the forward work attachment, and a pin boss portion provided on the side plate. The cutting unit has a cutting blade as a movable cutter arm positioned to the side or outward from the front work attachment. Work equipment.

14. A work apparatus according to claim 13, The cutting unit comprises a receiving portion or fixed blade supported by the lower bracket or the support bracket, and a drive cylinder or drive link for rotating the cutting blade. The receiving portion or fixed blade is supported separately from the main body of the forward work attachment. Work equipment.

15. A work apparatus according to claim 14, The main cutting reaction force when cutting an object between the cutting blade and the receiving portion or fixed blade is transmitted via a load transmission path including the receiving portion or fixed blade, the rotation axis of the cutting blade, the lower bracket, and the support bracket. Work equipment.

16. A work apparatus according to claim 13, The aforementioned forward work attachment includes a bucket, The bucket comprises a bucket body and mounting lugs corresponding to the first mounting pin and the second mounting pin. The bucket body is not integrally fixed to the lower bracket by welding, and can be removed from the lower bracket by releasing the first mounting pin and the second mounting pin. Work equipment.

17. A work apparatus according to claim 13, A hydraulic valve block or hydraulic piping that supplies hydraulic fluid to the cutting unit is located on the support bracket or the lower bracket side. Even after the removal of the forward work attachment, at least a portion of the hydraulic valve block or the hydraulic piping remains on the common base unit side. Work equipment.

18. A work apparatus according to claim 1, 5, or 8, A swivel section provided on the support bracket, which shares the same swivel structure regardless of the type of forward work attachment and rotates the entire support bracket, Furthermore, Work equipment.

19. A cutting unit having a rotatable cutting blade and a receiving portion facing the cutting blade, supported by a support frame connected to the arm of a work vehicle, Multiple types of forward work attachments are interchangeably mounted to the aforementioned support frame, Equipped with, The aforementioned multiple types of forward work attachments include buckets, rakes, and grapples. The cutting unit is fixed to the support frame and is configured to allow cutting operations even when the multiple types of forward work attachments are not attached. Regardless of which forward work attachment is attached, the support structure and drive structure of the cutting unit are maintained in common. The cutting unit is positioned offset to one side in the left-right direction of the support frame, and the cutting blade rotates in an area outside or away from the side wall of the mounted front work attachment. Interchangeable forward work attachment system.

20. A replaceable forward work attachment system according to claim 19, Each of the aforementioned multiple types of forward work attachments is detachable from the support frame by a common mounting pin standard. A load transmission structure in which the main cutting reaction force of the cutting unit is received on the support frame side without being transmitted to the multiple types of forward work attachments as the main load transmission members, Equipped with, Interchangeable forward work attachment system.

21. A replaceable forward work attachment system according to claim 20, When replacing the aforementioned multiple types of forward work attachments, the connection points of the hydraulic piping for supplying hydraulic fluid to the cutting unit are concentrated on the support frame side. Interchangeable forward work attachment system.

22. The device comprises a support bracket connected to the arm of a work vehicle, a cutting unit supported by the support bracket and having a rotatable cutting blade and a receiving portion facing the cutting blade, a lower bracket included in the support bracket, and a front work attachment detachably attached to the lower bracket by a first mounting pin and a second mounting pin. The lower bracket has a pair of side plates spaced apart from each other, and a first pin insertion hole and a second pin insertion hole provided in the pair of side plates. The forward work attachment has mounting tabs corresponding to the first pin insertion hole and the second pin insertion hole, The first mounting pin passes through the first pin insertion hole and the mounting tab, and the second mounting pin passes through the second pin insertion hole and the mounting tab, thereby detachably connecting the front work attachment to the lower bracket. The cutting unit is supported such that the primary cutting reaction force generated by the driving of the cutting blade is transmitted to the support bracket side via the lower bracket, without passing through the front work attachment as the primary load transmission member. A method for changing attachments on a work device, The steps include releasing or removing the first mounting pin and the second mounting pin to separate the front work attachment from the lower bracket, With the cutting unit and the lower bracket remaining on the support bracket side, the process involves attaching another forward work attachment to the lower bracket, Attachment replacement method, including [details omitted].

23. The attachment replacement method according to claim 22, The aforementioned other forward working attachments are selected from buckets, grapples, and rakes. The process further includes attaching the aforementioned other forward work attachment to the lower bracket, and then using the cutting unit to cut the object to be cut. How to change the attachment.

24. The attachment replacement method according to claim 22, With the bucket attached to the lower bracket as the forward work attachment, the process involves positioning the object to be cut near the bucket, The process involves rotating the cutting blade supported on the lower bracket side toward the receiving part or the fixed blade, and cutting the object to be cut. Attachment replacement method, including [details omitted].

25. A work tool kit for a work device comprising: a support bracket connected to the arm of a work vehicle; a lower bracket included in the support bracket; a cutting unit that is supported or held together on the lower bracket side and has a rotatable cutting blade and a receiving portion facing the cutting blade; and a plurality of types of work tools that are interchangeably attached to the lower bracket, The lower bracket has a pair of side plates spaced apart from each other, and a first pin insertion hole and a second pin insertion hole provided in the pair of side plates. The aforementioned multiple types of work tools include at least two types: buckets, grapples, and rakes. Each of the aforementioned multiple types of work tools has a mounting lug corresponding to the same or interchangeable mounting pin standard, and has a mounting lug corresponding to the first pin insertion hole and the second pin insertion hole. The cutting unit is supported such that the primary cutting reaction force generated by the driving of the cutting blade is transmitted to the support bracket side via the lower bracket, without passing through the multiple types of work tools as the primary load transmission members. Tool kit.

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