Adhesion prevention member and bucket

Abstract

To effectively suppress adhesion of a work object on a work tool.SOLUTION: An adhesion suppression member 10 for suppressing adhesion of a work object on a work tool 20 of a construction machine 100 is formed into such a plate shape as to have a water-repellent resin material 12 on a surface, and is installed in a prescribed part of the work tool 20 so that the surface constitutes a part of a surface in contact with the work object of the work tool 20.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to an adhesion prevention member and , bucket The present invention relates to a technology particularly suitable for construction machinery that processes work objects such as earth and sand, mud, etc. [Background technology]

[0002] In earthworks, ground improvement works, piling works, etc., excavation work is carried out using construction machinery such as backhoes, wheel loaders, earth augers, earth drills, bulldozers, horizontal multi-axis excavators, power blenders, etc. For example, in the case of a backhoe, if soil material containing wet clay adheres and accumulates on the inner surface of the bucket during excavation work, the effective capacity of the bucket decreases, which is a factor that reduces work efficiency.

[0003] In such cases, the operator shakes the bucket or applies impact to it to shake off the soil adhering to it. However, bucket swings and impacts can generate loud noise and vibration, so construction work must be carried out with consideration for the surrounding environment. In addition, the accumulated swings and impacts of the bucket can easily cause fatigue in the connectors at the bucket connection points and the bucket tip, requiring the time and effort of replacing them periodically.

[0004] Reduced work efficiency due to soil adhering to the bucket also occurs in the automated driving systems for construction machinery, which have been increasingly put into practical use in recent years. It is difficult for the system to continuously monitor the amount of soil adhering to the bucket during automated driving, and it is also difficult to intentionally swing the bucket using automatic control. For this reason, if automated driving continues for more than a certain period of time, the system must be interrupted and the bucket cleaned. However, cleaning the bucket requires a worker to approach the construction machinery, which poses safety issues, such as the risk of the worker coming into contact with other automated construction machinery.

[0005] A technique for preventing soil from adhering to the inside of a bucket is disclosed, for example, in Patent Document 1. In the technique described in Patent Document 1, a water-repellent coating or lining is provided on the entire inner surface of the bucket. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-164595 Summary of the Invention [Problem to be solved by the invention]

[0007] However, buckets have curved sections and welded beads. Therefore, it is practically difficult to attach a lining or coating to the entire inner surface of a bucket, as in the technique described in Patent Document 1. Furthermore, in a configuration in which a lining or coating is provided on the entire inner surface of a bucket, if the lining or coating is damaged by an impact during excavation, it is difficult to repair only the damaged area. Therefore, with the technique described in Patent Document 1, the bucket must be removed from the construction machine when repair work is performed, which poses a problem of requiring excavation to be suspended for an extended period of time. In other words, there is a need for an adhesion-preventing member for construction machinery that effectively prevents work objects from adhering to the tool while also being easy to attach and repair.

[0008] The technology disclosed herein has been developed in consideration of the above circumstances, and aims to improve installation workability and repairability while effectively preventing work objects from adhering to the work tool. [Means for solving the problem]

[0009] The adhesion prevention member (10) of the present disclosure is An adhesion prevention member (10) for preventing a work object from adhering to a work tool (20, 20', 30, 40, 50, 60, 70, 80) of a construction machine (100, 200, 300, 400, 500, 600, 700), It is formed in a plate shape with a water-repellent resin material (12) on the surface, and is installed at a predetermined portion of the work tool (20, 20', 30, 40, 50, 60, 70, 80) so that the surface forms part of the surface of the work tool (20, 20', 30, 40, 50, 60, 70, 80) that contacts the work object. It is characterized by:

[0010] The adhesion prevention member (10) according to another aspect of the present disclosure includes: The device further includes a plate-shaped metal material (11) that is bonded to the surface opposite to the surface of the resin material (12) and fixed to the predetermined portion. It is characterized by:

[0011] The working tool (20, 20') of the present disclosure is a working tool (20, 20') equipped with an adhesion prevention member (10), The construction machine is a backhoe (100), The working implement (20, 20') is a bucket (20, 20') that is rotatably attached to the tip of the arm (142) of the backhoe (100) and has a bottom plate portion (21) and side plate portions (22, 23) that form a storage portion (28) that stores the excavated work object, The adhesion prevention member (10) is provided on either or both of the bottom plate portion (21) and the side plate portions (22, 23). It is characterized by:

[0012] In another embodiment of the work implement (20') of the present disclosure, The bucket (20') is a skeleton bucket (20') having a plurality of meshes (27) formed on the bottom plate portion (21), The adhesion prevention member (10) is installed on either or both of the portion of the bottom plate portion (21) where the meshes (27) are not provided and the side plate portions (22, 23). It is characterized by:

[0013] In another aspect of the present disclosure, a work implement (20) includes: The adhesion prevention member (10) is formed in a rectangular plate shape, A plurality of the adhesion suppression members (10) are arranged in parallel on the bottom plate portion (21) so that their longitudinal directions are substantially parallel to the direction of the rotation axis (R) of the bucket (20). It is characterized by:

[0014] In another aspect of the present disclosure, a work implement (20) includes: the bottom plate portion (21) has a flat surface portion (21A) extending from the opening side of the storage portion (28) and a curved surface portion (21B) curved so as to be convex from an end of the flat surface portion (21A) opposite to the opening side toward the outside of the storage portion (28), A plurality of the adhesion prevention members (10) are provided on the flat surface portion (21A) and at least on a portion of the curved surface portion (21B) on the flat surface portion (21A) side. It is characterized by:

[0015] In another aspect of the present disclosure, a work implement (20) includes: The bucket (20) includes an edge plate portion (24) joined to an end of the bottom plate portion (21) and forming a part of the opening edge of the storage portion (28), The adhesion prevention member (10) is installed on at least one or all of the bottom plate portion (21), the side plate portions (22, 23), and the edge plate portion (24). It is characterized by:

[0016] In another aspect of the present disclosure, a work implement (20) includes: the bucket (20) further includes claw portions (5A to 5E) attached to the tip of the edge plate portion (24) via adapters (4A to 4E), The adhesion prevention member (10) is provided on at least one or all of the bottom plate portion (21), the side plate portions (22, 23), the edge plate portion (24), and the claw portions (5A to 5E). It is characterized by:

[0017] Another aspect of the present disclosure is a work implement (20): The bucket (20) further includes a vibration generator (8A) that is provided in the bucket (20) and is capable of transmitting vibrations to the bucket (20). It is characterized by:

[0018] A working tool (30) according to another aspect of the present disclosure is a working tool (30) including an adhesion prevention member (10), The construction machine is a wheel loader (200), the working implement is a bucket (30) that is rotatably attached to the tip of a boom (231) of the wheel loader (200) and that has a bottom plate portion (31) and side plate portions (32, 33) that form a storage portion (38) that stores the work object; The adhesion prevention member (10) is provided on either or both of the bottom plate portion (31) and the side plate portions (32, 33). It is characterized by:

[0019] A working tool (40) according to another aspect of the present disclosure is a working tool (40) including an adhesion prevention member (10), The construction machine is a bulldozer (300), the working implement is a blade (40) attached to the tip of a support frame (331, 332) of the bulldozer (300) and configured to push out the work object; The adhesion prevention member (10) is installed on the front surface of the blade (40). It is characterized by:

[0020] A working tool (50) according to another aspect of the present disclosure is a working tool (50) including an adhesion prevention member (10), The construction machine is an earth drill excavator (400) used in an earth drill method for pile construction, the work tool is a drilling bucket (50) attached to the tip of a kelly bar (450) provided in the earth drill excavator (400) and adapted to take in and discharge excavated earth and sand as the work object; The drilling bucket (50) includes a cylindrical bucket body (51) and a bottom cover (52) that can close a lower end opening of the bucket body, The adhesion prevention member (10) is installed on either or both of the inner peripheral surface of the bucket body (51) and the inner surface of the bottom cover (52). It is characterized by:

[0021] A working tool (60) according to another aspect of the present disclosure is a working tool (60) including an adhesion prevention member (10), The construction machine is an all-casing excavator (500) used in the all-casing method of pile construction, The working implement is a hammer grab (60) that is suspended by a lifting device (530) provided on the all-casing excavator (500) and grabs and discharges excavated earth and sand as the work object, The hammer grab (60) includes a hammer grab body (61) and a pair of shells (63, 64) attached to a lower end of the hammer grab body (61) so as to be able to open and close freely, The adhesion prevention member (10) is installed on the inner peripheral surfaces of the pair of shells (63, 64). It is characterized by:

[0022] A working tool (70) according to another aspect of the present disclosure is a working tool (70) including an adhesion prevention member (10), The construction machine is a horizontal multi-axis excavator (600) used in a diaphragm wall construction method, The working implements are a pair of rotary cutters (70, 70) that are arranged side by side at the lower end of an excavator body (620, 621) of the horizontal multi-axis excavator (600) and are rotationally driven to excavate the ground, The rotary cutter (70, 70) includes a cylindrical rotating drum (71) and a plurality of blades (72) that are provided on the outer peripheral surface of the rotating drum (71) so as to protrude in the radial direction and have cutter bits (74) fixed to their tips. The adhesion prevention member (10) is installed on the surface of the plurality of blades (72). It is characterized by:

[0023] A working tool (80) according to another aspect of the present disclosure is a working tool (80) including an adhesion prevention member (10), The construction machine is a ground improvement device (700) used in a power blender construction method, The working tool is a trencher type agitator mixer (80) provided in the ground improvement device (700), The trencher-type agitating mixer (81) includes a columnar frame (81), sprockets (82, 83) respectively provided at the upper and lower ends of the frame (81), an endless chain (84) wound around the sprockets (82, 83), and a plurality of agitating blades (88) provided on the outer periphery of the endless chain (84), The adhesion prevention member (10) is installed on either or both of the surface of the frame (81) and the surface of the stirring blade (88). It is characterized by:

[0024] The claw member (5F) of the present disclosure is a claw member (5F) attached to a working tool (20), The claw body (5G) includes a flat portion (5H) formed with a length substantially equal to the opening width of the bucket (20), and the claw body (5G) is attached to the tip of the edge plate (24) via an adapter (4A-4E), and the adhesion suppression member (10) is installed on the flat portion (5H). It is characterized by:

[0025] The adhesion suppression method of the present disclosure is an adhesion suppression method using an adhesion suppression member (10), The adhesion prevention member (10) is installed at the predetermined portion of the working tool (20, 20', 30, 40, 50, 60, 70, 80) so that the surface of the adhesion prevention member (10) forms a part of the surface of the working tool (20, 20', 30, 40, 50, 60, 70, 80) that contacts the work object. It is characterized by:

[0026] In the above description, to aid in understanding the present disclosure, the symbols used in the embodiments are added in parentheses to components corresponding to the embodiments, but each component is not limited to the embodiment defined by the symbol. [Effects of the Invention]

[0027] According to the technology of the present disclosure, it is possible to effectively prevent the work object from adhering to the work tool while improving the ease of installation and repair. [Brief explanation of the drawings]

[0028] [Figure 1] 1 is a schematic side view showing a construction machine of a first embodiment. FIG. [Figure 2] FIG. 2 is a schematic perspective view showing a bucket according to the first embodiment. [Figure 3] FIG. 10 is a perspective view schematically showing soil adhering to the inner surface of the bucket. [Figure 4] 1A is a schematic perspective view showing an adhesion-preventing member according to the present embodiment, and FIG. 1B is a cross-sectional view taken along the line AA in FIG. [Figure 5] FIG. 10 is a schematic perspective view illustrating an example in which an adhesion prevention member is installed on the inner surface of a bucket. [Figure 6] FIG. 10 is a schematic diagram illustrating the attachment pattern of the adhesion-preventing member in Demonstration Test 1. [Figure 7] FIG. 1 is a schematic diagram illustrating the results of Demonstration Test 1. [Figure 8] FIG. 10 is a schematic diagram illustrating the attachment pattern of the adhesion-preventing member in Demonstration Test 2. [Figure 9] FIG. 10 is a schematic diagram illustrating the results of Demonstration Test 2. [Figure 10] FIG. 10 is a schematic diagram illustrating the attachment pattern of the adhesion-preventing member in Demonstration Test 3. [Figure 11] FIG. 10 is a schematic diagram illustrating the results of Demonstration Test 3. [Figure 12] FIG. 10 is a schematic diagram illustrating the results of a noise test. [Figure 13]FIG. 2 is a schematic perspective view showing a bucket of a first modified example according to the first embodiment. [Figure 14] FIG. 10 is a schematic perspective view showing a bucket of a second modified example according to the first embodiment. [Figure 15] FIG. 10 is a schematic perspective view showing a bucket of a third modified example according to the first embodiment. [Figure 16] FIG. 10 is a schematic perspective view showing a bucket of a fourth modified example according to the first embodiment. [Figure 17] FIG. 10 is a schematic side view showing a construction machine according to a second embodiment. [Figure 18] FIG. 10 is a schematic perspective view showing a bucket according to a second embodiment. [Figure 19] FIG. 10 is a schematic side view showing a construction machine according to a third embodiment. [Figure 20] FIG. 10 is a schematic perspective view showing a blade according to a third embodiment. [Figure 21] FIG. 10 is a schematic side view showing a construction machine according to a fourth embodiment. [Figure 22] FIG. 10 is a schematic side view showing a drilling bucket according to a fourth embodiment. [Figure 23] FIG. 10 is a schematic vertical cross-sectional view showing a drilling bucket according to a fourth embodiment. [Figure 24] FIG. 10 is a schematic side view showing a construction machine according to a fifth embodiment. [Figure 25] FIG. 11 is a schematic perspective view showing a state in which a hammer grab according to a fifth embodiment is closed. [Figure 26] FIG. 13 is a schematic perspective view showing a state in which the hammer grab according to the fifth embodiment is open. [Figure 27] FIG. 10 is a schematic side view showing a construction machine according to a sixth embodiment. [Figure 28] FIG. 10 is a schematic view of a rotary cutter according to a sixth embodiment, viewed from the rotation axis direction. [Figure 29] FIG. 10 is a schematic view of a rotary cutter according to a sixth embodiment, viewed from a radial direction. [Figure 30] FIG. 13 is a schematic side view showing a construction machine according to a seventh embodiment. [Figure 31]FIG. 13 is a schematic perspective view showing a trencher type stirring mixer according to a seventh embodiment. [Figure 32] FIG. 13 is a schematic plan view of a modified example according to the seventh embodiment. [Figure 33] FIG. 13 is a schematic side view of a modified example according to the seventh embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0029] Hereinafter, an adhesion prevention member, a working tool, a claw member, and an adhesion prevention method according to this embodiment will be described with reference to the accompanying drawings.

[0030] [Construction machine of first embodiment] FIG. 1 is a schematic side view showing a construction machine of a first embodiment. The construction machine is, for example, a backhoe 100 (hydraulic excavator) equipped with a bucket 20 as a working implement. The construction machine is not limited to the backhoe 100, and may be, for example, a wheel loader, etc., as long as it is a construction machine equipped with a bucket. The construction machine may also be a dozer, grader, etc. equipped with a blade as a working implement. In the following, the construction machine will be described using the backhoe 100 as an example.

[0031] The backhoe 100 includes a lower traveling body 110, a slewing device 120, an upper rotating body 130, and a work implement 140. The lower traveling body 110 includes a crawler 112 and a drive unit (not shown). The backhoe 100 travels by driving the crawler 112 with power transmitted from the drive unit.

[0032] The upper rotating body 130 is supported on the lower traveling body 110 via a rotating device 120. The upper rotating body 130 is driven to rotate by operating the rotating device 120 using power from a hydraulic motor (not shown). A cabin 131 is provided on the upper rotating body 130. An operator who operates the backhoe 100 rides in the cabin 131. The backhoe 100 may be operated by remote control or may be operated by automatic driving control. In this case, the backhoe 100 does not need to be equipped with the cabin 131.

[0033] The work implement 140 includes a boom 141, an arm 142, a bucket link 143, a bucket 20 as a work implement, and multiple cylinders 150, 151, and 152. The base end of the boom 141 is rotatably supported by the upper rotating body 130. The base end of the arm 142 is rotatably supported at the tip end of the boom 141. The bucket 20 is rotatably supported at the tip end of the arm 142. The bucket link 143 connects the arm 142 and the bucket 20.

[0034] The boom cylinder 150 is connected to the upper rotating body 130 and the boom 141. When the boom cylinder 150 extends or retracts, the boom 141 rotates relative to the upper rotating body 130. The arm cylinder 151 is connected to the boom 141 and the arm 142. When the arm cylinder 151 extends or retracts, the arm 142 rotates relative to the boom 141.

[0035] The bucket cylinder 152 is connected to the arm 142 and the bucket link 143. When the bucket cylinder 152 extends or retracts, the bucket 20 rotates relative to the arm 142. Note that an auxiliary attachment such as a tiltrotator that rotates the bucket 20 around the axis of the arm 142 may be installed between the bucket 20 and the arm 142.

[0036] [Bucket (working tool)] FIG. 2 is a schematic perspective view showing the bucket 20 according to the first embodiment. Hereinafter, the direction of the rotation axis R of the bucket 20 may also be referred to as the "left-right direction" or "width direction." In FIG. 2, the bucket 20 is shown as a so-called standard bucket, but it may also be a narrow bucket or a wide bucket. Furthermore, the bucket 20 may also be another type of bucket, such as a slope bucket, a multi-purpose bucket, a material handling bucket, or a grab bucket.

[0037] The bucket 20 is formed of, for example, steel, and includes a bucket main body 20A, a plurality of adapters 4A to 4E, a plurality of claws 5A to 5E, and a pair of brackets 6L, 6R.

[0038] Bucket body 20A has a bottom plate 21, a left side plate 22, a right side plate 23, an edge plate 24, and a bracket fixing plate 25. Bottom plate 21 and side plates 22, 23 form a storage section 28 for storing work objects such as excavated earth, sand, and mud.

[0039] The bottom plate 21 has a flat surface 21A extending substantially flat from the opening side of the storage section 28 and a curved surface 21B that curves convexly from the end of the flat surface 21A toward the outside of the storage section 28. The flat surface 21A and the curved surface 21B may be formed of a single plate material, or may be formed by joining separate plate materials by welding or the like. An edge plate 24 is fixed by welding to the end of the flat surface 21A opposite the curved surface 21B. A bracket fixing plate 25 is fixed by welding to the end of the curved surface 21B opposite the flat surface 21A. The left side plate 22 is fixed by welding to the bottom plate 21, the edge plate 24, and the left end of the bracket fixing plate 25. The right side plate 23 is fixed by welding to the right end of the bottom plate 21, the edge plate 24, and the bracket fixing plate 25.

[0040] A plurality of adapters 4A to 4E are fixed at predetermined intervals in the left-right direction to the edge plate portion 24. A plurality of claw portions 5A to 5E are detachably attached to the plurality of adapters 4A to 4E. In Fig. 2, the claw portions 5A to 5E are shown as flat claws, but they may also be excavation claws that become thinner toward the tip.

[0041] The pair of brackets 6L, 6R are provided on the outer surface of the bracket fixing plate portion 25 opposite the housing portion 28, and face each other at a predetermined distance in the left-right direction. A pair of insertion holes 6A, 6B are each provided in the brackets 6L, 6R. A pin (not shown) for connecting the bucket main body 20A to the arm 142 (see FIG. 1) is inserted into the insertion hole 6A on the opening side. A pin (not shown) for connecting the bucket main body 20A to the bucket link 143 (see FIG. 1) is inserted into the insertion hole 6B on the rear side. The bucket 20 is configured to rotate about the axis of the insertion hole 6A when the bucket cylinder 152 (see FIG. 1) is extended or retracted. In other words, the axis of the insertion hole 6A coincides with the rotation axis R of the bucket 20.

[0042] Consider the case where bucket 20 is excavating soil, such as soil containing wet clay. Wet soil has a tendency to adhere to the inner surface of bucket 20, which is made of steel. As shown in gray in FIG. 3, such wet soil tends to adhere to (1) edge plate 24 of bucket body 20A, (2) flat surface 21A of bottom plate 21 and the portion of curved surface 21B facing flat surface 21A, and (3) the portions of side plates 22, 23 facing edge plate 24 and flat surface 21A. Furthermore, if claws 5A-5E are flat-claw types, soil also tends to adhere between each of claws 5A-5E.

[0043] If soil adheres to and accumulates on the inner surface of the bucket 20, the effective volume of the storage section 28 will decrease, which will result in reduced work efficiency. When soil accumulates inside the bucket 20, the soil can be shaken off by swinging the bucket 20 or by impacting the bucket 20, but this will generate loud noise and vibration. Furthermore, when the backhoe 100 is operated automatically, it is difficult for the system to intentionally swing the bucket 20. For this reason, if automatic operation is performed continuously for more than a certain period of time, the automatic operation will be temporarily interrupted and the bucket 20 will be cleaned, but this requires an operator to approach the bucket 20, which poses a safety issue.

[0044] Therefore, in the first embodiment, an adhesion prevention member 10 shown in Fig. 4 is installed on the inner surface of the bucket 20 to prevent soil from adhering to the inner surface of the bucket 20. Details of the adhesion prevention member 10 will be described below.

[0045] [Adhesion prevention material] Fig. 4(A) is a schematic perspective view showing the adhesion prevention member 10 according to this embodiment, and Fig. 4(B) is a cross-sectional view taken along line AA in (A).

[0046] 4(A), the adhesion prevention member 10 has a rectangular strip shape (rectangular plate shape) as a whole, and has a two-layer structure in which a lower layer of metal material 11 is bonded to an upper layer of resin material 12. Hereinafter, the direction in which the long sides of the adhesion prevention member 10 extend will be referred to as the longitudinal direction X, and the direction in which the short sides extend will be referred to as the lateral direction Y.

[0047] The metal material 11 is, for example, a plate-shaped steel material, and in this embodiment, is formed of stainless steel, which has excellent corrosion resistance. The metal material 11 may also be formed using carbon steel, tool steel, or the like. The length W1 (see FIG. 4(B)) of the metal material 11 in the short-side direction Y is not particularly limited, but is approximately 90 to 110 mm, preferably approximately 105 mm, in this embodiment. The length L1 (see FIG. 4(A)) of the metal material 11 in the long-side direction X may be an appropriate length, such as 500 to 2000 mm, depending on the width of the bucket 20. The thickness T1 (see FIG. 4(B)) of the metal material 11 is preferably a thickness that allows an operator to grasp both ends of the adhesion suppression member 10 in the short-side direction Y and manually bend and plastically deform the adhesion suppression member 10. In this embodiment, the thickness T1 of the metal material 11 is approximately 0.1 to 1 mm, preferably approximately 0.5 mm.

[0048] The resin material 12 is, for example, a plate-shaped fluororesin material, and in this embodiment is made of polytetrafluoroethylene (hereinafter, PTFE). PTFE has very low surface free energy (surface tension), excellent water repellency and oil repellency, and can effectively prevent soil from adhering. Note that the resin material 12 is not limited to PTFE, and other materials such as PFA (perfluoroalkoxyalkane), FEP (perfluoroethylenepropene copolymer), ETFE (ethylenetetrafluoroethylene copolymer), and PVDF (polyvinylidene fluoride / vinylidene fluoride / polyvinylidene fluoride) can be used.

[0049] The length W2 (see FIG. 4(B)) of the resin material 12 in the short-side direction Y is not particularly limited, but in this embodiment it is about 90 to 105 mm, preferably about 100 mm. The length L2 (see FIG. 4(A)) of the resin material 12 in the long-side direction X may be an appropriate length depending on the width of the bucket 20, similar to the length L1 of the metal material 11. The thickness T2 (see FIG. 4(B)) of the resin material 12 is not particularly limited, but in this embodiment it is about 0.1 to 1 mm, preferably about 0.5 mm.

[0050] Here, the fluororesin used for the resin material 12 is a difficult-to-bond material, and it is difficult to simply bond the resin material 12 to the metal material 11. For example, the bonding method disclosed in JP 2022-049070 A can be used to bond the resin material 12 to the metal material 11. An outline of the bonding method will be briefly described below. Step (1): A laser beam is irradiated to the surface (joining surface) of the metal material 11 that is to be joined to the resin material 12 in an oxidizing atmosphere, and metal oxide particle clusters consisting of continuous metal oxide particles are formed on the joining surface of the metal material 11. Step (2): The metal material 11 on which the metal oxide particle clusters are formed is brought into contact with the resin material 12 to form a joining interface. Step (3): The interface to be joined is heated by irradiating it with laser light, and pressure is applied to the interface to be joined by bringing the metal material 11 and the resin material 12 into close contact with each other using a roller. The adhesion-inhibiting member 10 manufactured by the above steps (1) to (3) has a high bond strength between the resin material 12 and the metal material 11, and can withstand shocks and the like during excavation without peeling off from each other.

[0051] The method for joining the metal material 11 and the resin material 12 is not limited to the above-described steps (1) to (3), and other well-known methods can also be used. In the following description, the surface of the metal material 11 opposite the interface to be joined will be referred to as the "back surface" of the adhesion suppression member 10, and the surface of the resin material 12 opposite the interface to be joined will be referred to as the "front surface" of the adhesion suppression member 10.

[0052] [Installation of adhesion suppression member of first embodiment] FIG. 5 is a schematic perspective view illustrating an example in which the adhesion prevention member 10 of the first embodiment is installed on the inner surface of the bucket 20. As shown in FIG.

[0053] The adhesion prevention member 10 may be attached to the inner surface of the bucket 20 with double-sided tape attached to the back surface (preferably the entire back surface), or may be adhered to the inner surface of the bucket 20 with an adhesive applied to the back surface. If double-sided tape is used, adhesive marks are less likely to remain when replacing the adhesion prevention member 10 with a new one, making the replacement work easier. There are no particular restrictions on the type of double-sided tape, but it is preferable to use outdoor double-sided tape with strong adhesive strength.

[0054] The installation of the adhesion prevention member 10 is not limited to the method using double-sided tape or adhesive, and the edge E (see FIG. 4(B)) of the metal material 11 that protrudes beyond the resin material 12 may be fixed to the inner surface of the bucket 20 by spot welding, or predetermined locations of the adhesion prevention member 10 may be fixed using rivets or bolts. In the following description, the adhesion prevention member 10 is described as being attached using double-sided tape.

[0055] As shown in Fig. 5, multiple adhesion prevention members 10 are installed on the inner surface of bucket 20 in areas where work objects such as soil and mud containing wet clay tend to adhere (see gray area in Fig. 3). Specifically, adhesion prevention members 10 are attached to (1) edge plate portion 24, (2) flat surface portion 21A of bottom plate portion 21 and the flat surface portion 21A side portion of curved surface portion 21B, and (3) the flat surface portion 21A side portion of side plate portions 22, 23.

[0056] The adhesion suppression members 10 on the edge plate portion 24 and the bottom plate portion 21 are attached so that their longitudinal directions are approximately parallel to the direction of the rotation axis R of the bucket 20. A welded bead BD is present at the boundary between the edge plate portion 24 and the bottom plate portion 21, and if the adhesion suppression member 10 interferes with the bead BD, the adhesion suppression member 10 will be easily peeled off due to impacts during excavation work, etc. For this reason, the adhesion suppression member 10 is attached near the boundary between the edge plate portion 24 and the bottom plate portion 21 in a manner that removes the bead BD.

[0057] The adhesion suppressing members 10 are attached to the curved surface portion 21B after first bending and plastically deforming the adhesion suppressing members 10 to fit the curved surface portion 21B. Bending and attaching the adhesion suppressing members 10 can improve the adhesive strength of the adhesion suppressing members 10 to the curved surface portion 21B. In the illustrated example, one adhesion suppressing member 10 is attached to the edge plate portion 24 and a total of four adhesion suppressing members 10 are attached to the bottom plate portion 21, but the number of adhesion suppressing members 10 is not limited to this, and an appropriate number of adhesion suppressing members 10 may be attached depending on the specific dimensions of the edge plate portion 24 and the bottom plate portion 21.

[0058] The adhesion prevention members 10 are attached to the side plates 22, 23 so that their longitudinal directions are approximately parallel to the surface direction of the flat surface portion 21A. It is sufficient that the adhesion prevention members 10 are attached to at least the portions of the side plates 22, 23 that face the flat surface portion 21A. In the illustrated example, three adhesion prevention members 10 are attached to each of the left side plate 22 and the right side plate 23, but the number of adhesion prevention members 10 is not limited to this, and an appropriate number of adhesion prevention members 10 may be attached depending on the specific dimensions of the side plates 22, 23.

[0059] Multiple adhesion-inhibiting members 10 may be attached in a spread pattern, but if the ends of adjacent adhesion-inhibiting members 10 are in contact with each other, the ends of the adhesion-inhibiting members 10 may interfere with each other due to impacts, vibrations, and the like during excavation work, which may cause the adhesion-inhibiting members 10 to easily peel off. For this reason, multiple adhesion-inhibiting members 10 are preferably attached with a predetermined clearance C between them. Although the specific value of the clearance C is not particularly limited, the narrower the clearance C, the greater the effect of inhibiting soil adhesion. In this embodiment, the clearance C is set to 20 to 90 mm, preferably 30 mm.

[0060] 5, the claws 5A to 5E attached to the bucket 20 are of the so-called flat-claw type. When the claws 5A to 5E are of the flat-claw type, soil tends to adhere to the spaces between the claws 5A to 5E. For this reason, it is preferable to attach adhesion suppression members 10 to the claws 5A to 5E as well.

[0061] As described above, when the adhesion suppression member 10 is attached to the inner surface of the bucket 20, the resin material 12 forming the surface of the adhesion suppression member 10 has a low surface free energy, making it difficult for excavated soil contained in the bucket 20 to adhere to the surface of the adhesion suppression member 10. In other words, the excavated soil contained in the bucket 20 can be effectively discharged without accumulating inside the bucket 20. This effectively prevents a decrease in the bucket 20's effective capacity and reliably prevents a decrease in work efficiency. Furthermore, shaking or impacting the bucket 20 to shake off the adhering soil is almost unnecessary, or the number of such shaking or impacts can be minimized, effectively preventing the generation of loud noise and vibration. Furthermore, the accumulation of fatigue associated with the shaking or impact of the bucket 20 can be effectively reduced, thereby extending the life of the bucket 20 until periodic replacement. Furthermore, since workers no longer need to approach the bucket 20 to clean it, safety can be improved.

[0062] Furthermore, because the metal material 11 and the resin material 12 of the adhesion suppression member 10 are thin and easily deformable, the adhesion suppression member 10 can be attached in close contact with the curved surface portion 21B of the bottom plate portion 21. Furthermore, because the adhesion suppression member 10 is strip-shaped, it can be attached by removing the bead BD or the like at the boundary between the edge plate portion 24 and the bottom plate portion 21. In other words, it is possible to reliably improve the adhesion of the adhesion suppression member 10 to the bucket 20 while also effectively improving the ease of installation.

[0063] Furthermore, the multiple adhesion prevention members 10 are each independently attached to the inner surface of the bucket 20. Therefore, if some of the adhesion prevention members 10 are damaged by impact during excavation or deteriorated after long-term use, only the damaged or deteriorated adhesion prevention members 10 need to be replaced. In other words, the replacement work can be performed while the bucket 20 is still attached to the backhoe 100, which reliably improves repairability. Furthermore, because the replacement work can be completed in a short time, it is possible to minimize the impact on excavation work and construction schedule.

[0064] [Demonstration Test 1] A demonstration test was conducted to confirm the effectiveness of soil adhesion prevention by attaching adhesion prevention members 10 to the bucket of a backhoe. Figure 6 is a schematic diagram illustrating the attachment pattern of adhesion prevention members 10 in demonstration test 1. In the figure, the adhesion prevention members 10 are shown hatched. The adhesion prevention members 10 were attached to the inner surface of the bucket using double-sided tape.

[0065] In pattern (A1), one adhesion prevention member 10 was attached to the edge plate portion so that its longitudinal direction was approximately parallel to the rotational axis direction of the bucket. In addition, a total of five adhesion prevention members 10 were attached in parallel to the flat and curved surfaces of the bottom plate portion so that their longitudinal directions were approximately parallel to the rotational axis direction of the bucket. The clearance between each adhesion prevention member 10 was set to approximately 30 mm. The value obtained by dividing the total surface area of ​​each adhesion prevention member 10 by the surface area of ​​the inner surface of the bucket (hereinafter referred to as the PTFE area ratio) was approximately 36%.

[0066] In pattern (B1), a total of four adhesion suppression members 10 were attached in parallel to the bottom plate so that their longitudinal directions were approximately perpendicular to the rotation axis direction of the bucket. In addition, a total of two adhesion suppression members 10 were attached in parallel to each of the left and right plate portions so that their longitudinal directions were approximately parallel to the surface direction of the flat surface portion of the bottom plate. The clearance between each adhesion suppression member 10 was set to approximately 130 mm. The PTFE area ratio was approximately 25%.

[0067] In pattern (C1), one adhesion suppression member 10 was attached near the left and right plate portions of the bottom plate so that its longitudinal direction was approximately perpendicular to the rotation axis direction of the bucket. In addition, one adhesion suppression member 10 was attached near the bottom plate portion of the left and right plate portions so that its longitudinal direction was approximately parallel to the surface direction of the flat surface portion of the bottom plate. The PTFE area ratio was approximately 12%.

[0068] Pattern (D1) is a comparative example in which no adhesion inhibiting member 10 is attached to the bucket, and the PTFE area ratio is 0%.

[0069] In Demonstration Test 1, a series of actions was performed 10 times: scooping a pile of wet soil into a bucket and discharging it elsewhere. The remaining soil was then scraped off from the bucket and the weight of the remaining soil was measured using a weighing scale. Figure 7 shows the measurement results of the remaining soil weight. The weight of the remaining soil for pattern (A1) was 19.3 kg. The weight of the remaining soil for pattern (B1) was 46.7 kg. The weight of the remaining soil for pattern (C1) was 96.6 kg. The weight of the remaining soil for pattern (D1) was 147.6 kg.

[0070] From the above measurement results, it was confirmed that even in pattern (C1), in which the adhesion suppression members 10 are attached only near the boundary between the bottom plate and the side plate, the weight of residual soil can be reduced compared to the comparative pattern (D1), and therefore a certain degree of soil adhesion suppression effect can be obtained. Furthermore, it was confirmed that even if the longitudinal direction of the adhesion suppression members 10 is perpendicular to the bucket rotation axis direction, pattern (B1), in which the adhesion suppression members 10 are attached to both the bottom plate and the side plate, can significantly reduce the weight of residual soil compared to the comparative pattern (D1). Furthermore, it was confirmed that pattern (A1), in which the longitudinal direction of the adhesion suppression members 10 is approximately parallel to the bucket rotation axis direction and is attached so that there is a clearance of approximately 30 mm, can significantly reduce the weight of residual soil compared to the comparative pattern (D1), and can further reduce the weight of residual soil compared to pattern (B1).

[0071] That is, it was confirmed that the greatest soil adhesion suppression effect can be achieved by attaching the adhesion suppression members 10 with their longitudinal direction approximately parallel to the bucket's rotation axis direction and with a small clearance. It was also confirmed that a high soil adhesion suppression effect can be achieved by attaching the adhesion suppression members 10 to both the bottom plate and the side plate, even when their longitudinal direction is approximately perpendicular to the bucket's rotation axis direction. It was also confirmed that a certain soil adhesion suppression effect can be achieved even when the number of adhesion suppression members 10 is small, as long as they are attached near the boundary between the bottom plate and the side plate.

[0072] [Demonstration Test 2] In Demonstration Test 2, it was confirmed whether there was a difference in the soil adhesion prevention effect between attaching the adhesion prevention member 10 all the way to the back (curved surface) of the bottom plate of the bucket and attaching it only to the claw portion without attaching it to the back of the bottom plate. Figure 8 is a schematic diagram explaining the attachment pattern of the adhesion prevention member 10 in Demonstration Test 3. As in Demonstration Test 1, the adhesion prevention member 10 was attached to the inner surface of the bucket using double-sided tape.

[0073] Pattern (A3) was the same as pattern (A1) in Verification Test 1. That is, one adhesion prevention member 10 was attached to the edge plate portion so that its longitudinal direction was approximately parallel to the rotation axis direction of the bucket. In addition, a total of five adhesion prevention members 10 were attached in parallel to the flat and curved surface portions of the bottom plate portion so that their longitudinal directions were approximately parallel to the rotation axis direction of the bucket. The clearance between each adhesion prevention member 10 was set to approximately 30 mm.

[0074] In pattern (B3), one adhesion prevention member 10 was attached to the edge plate portion so that its longitudinal direction was approximately parallel to the rotational axis direction of the bucket. Furthermore, a total of four adhesion prevention members 10 were attached in parallel to the flat surface portion of the bottom plate portion so that their longitudinal direction was approximately parallel to the rotational axis direction of the bucket. The clearance between each adhesion prevention member 10 was set to approximately 30 mm. Furthermore, one adhesion prevention member 10 was attached to the claw portion so that its longitudinal direction was approximately parallel to the rotational axis direction of the bucket.

[0075] In Demonstration Test 2, just as in Demonstration Test 1, the pile of wet soil was scooped into a bucket and then dumped elsewhere. This series of actions was repeated 10 times, after which the remaining soil in the bucket was scraped off and the weight of the remaining soil was measured using a weighing scale. Figure 9 shows the measurement results of the remaining soil weight. The weight of the remaining soil in pattern (A3) was 19.3 kg. The weight of the remaining soil in pattern (B3) was 30.0 kg.

[0076] From the above measurement results, it was confirmed that a higher soil adhesion prevention effect can be achieved by focusing on attaching the adhesion prevention member 10 to the flat and curved surfaces (rear side of the bottom plate) of the bottom plate, without attaching it to the claw portion (Pattern (A3): rear side of the bottom plate > Pattern (B3): claw portion).

[0077] [Demonstration Test 3] In Verification Test 3, it was confirmed whether there was a difference in the soil adhesion prevention effect depending on the clearance setting of each adhesion prevention member 10. Figure 10 is a schematic diagram explaining the attachment pattern of the adhesion prevention members 10 in Verification Test 4. As in Verification Test 1, the adhesion prevention members 10 were attached to the inner surface of the bucket using double-sided tape.

[0078] In pattern (A4), one adhesion suppression member 10 was attached to the edge plate portion so that its longitudinal direction was approximately parallel to the rotation axis direction of the bucket. A total of five adhesion suppression members 10 were attached in parallel to the flat and curved surfaces of the bottom plate portion so that their longitudinal directions were approximately parallel to the rotation axis direction of the bucket. A total of three adhesion suppression members 10 were attached in parallel to each of the left and right plate portions so that their longitudinal directions were approximately parallel to the surface direction of the flat surface portion of the bottom plate portion. The clearance between each adhesion suppression member 10 was set to approximately 30 mm.

[0079] In pattern (B4), one adhesion prevention member 10 was attached to the edge plate portion so that its longitudinal direction was approximately parallel to the rotation axis direction of the bucket. A total of four adhesion prevention members 10 were attached in parallel to the flat and curved surface portions of the bottom plate portion so that their longitudinal directions were approximately parallel to the rotation axis direction of the bucket. A total of three adhesion prevention members 10 were attached in parallel to each of the left and right plate portions so that their longitudinal directions were approximately parallel to the surface direction of the flat surface portion of the bottom plate portion. The clearance between each adhesion prevention member 10 was set to approximately 90 mm. A single adhesion prevention member 10 was attached to the claw portion so that its longitudinal direction was approximately parallel to the rotation axis direction of the bucket.

[0080] In Demonstration Test 3, just as in Demonstration Test 1, the series of actions of scooping a pile of wet soil into a bucket and discharging it to another location was repeated a total of 10 times, after which the remaining soil in the bucket was scraped off and the weight of the remaining soil was measured using a weighing scale. Figure 11 shows the measurement results of the remaining soil weight. The weight of the remaining soil in pattern (A4) was 15.6 kg. The weight of the remaining soil in pattern (B4) was 24.6 kg.

[0081] From the above measurement results, it was confirmed that a higher soil adhesion prevention effect can be obtained by setting the clearance smaller, even without attaching the adhesion prevention member 10 to the claw portion (Pattern (A4): emphasis on bottom plate portion > Pattern (B4): claw portion).

[0082] [Noise test] A noise test was conducted using a backhoe with adhesion suppression material 10 attached to the inner surface of the bucket. In the noise test, "noise during operation" and "noise during shaking" were measured. Measurements were taken at three locations, approximately 10 m, 20 m, and 30 m away from the backhoe. Here, the noise during operation refers to the noise generated when a series of actions, such as scooping a pile of wet soil into the bucket and discharging it to another location, was performed a total of 10 times. Furthermore, the noise during shaking refers to the noise generated when the bucket was swung to shake off the adhering soil. Figure 12 shows the noise measurement results.

[0083] As shown in Figure 12, the noise level during swing was 83 dB at the 10 m point, 77 dB at the 20 m point, and 74 dB at the 30 m point. The noise level during swing exceeded 80 dB at the 10 m point, and exceeded 70 dB at the 20 m and 30 m points, confirming that swinging the bucket generates extremely loud noise.

[0084] The maximum noise level during operation was 70 dB at the 10 m point, 65 dB at the 20 m point, and 63 dB at the 30 m point. The minimum noise level during operation was 64 dB at the 10 m point, 59 dB at the 20 m point, and 56 dB at the 30 m point. The average noise level during operation was 67 dB at the 10 m point, 62 dB at the 20 m point, and 60 dB at the 30 m point. Even at its maximum, the noise level during operation was about 11 to 13 dB (average 12 dB) lower than the noise level during oscillation, and it was confirmed that the maximum level was below 70 dB even at the 10 m point.

[0085] From the above results, it has been confirmed that if the adhesion prevention member 10 of this embodiment is attached to the bucket of a backhoe and excavation work is carried out, there is almost no need to swing the bucket to shake off the adhering soil, or the number of times this is done can be reduced to an extremely low number, making it possible to reliably keep noise levels low and enabling construction work that takes the surrounding environment into consideration.

[0086] The present disclosure is not limited to the above-described embodiments, and can be appropriately modified and implemented within the scope of the present disclosure.

[0087] [Modification 1 of the first embodiment] FIG. 13 is a schematic exploded perspective view showing a claw member 5F of Modified Example 1 according to the first embodiment. The claw member 5F of Modified Example 1 is formed by integrating the above-described claw portions 5A to 5E (see FIG. 2, etc.). Specifically, the claw member 5F has a claw main body 5G having a substantially triangular cross section. The claw main body 5G is preferably formed to have substantially the same length as the opening width of the storage portion 28 or the edge plate portion 24. The claw main body 5G has a flat, planar portion 5H to which the adhesion prevention member 10 is attached. A recess (not shown) is provided on the back side of the claw main body 5G into which a protrusion of the adapter 4A to 4E is inserted. The claw main body 5G is fixed to the adapter 4A to 4E via a pin (not shown) or the like.

[0088] According to the claw member 5F of Modification 1, the claw main body 5G is not a separate type that is individually attached to each adapter 4A-4E, but is formed as an integrated type that is attached to each adapter 4A-4E collectively. The claw main body 5G is provided with a flat surface 5H to which the adhesion suppression member 10 is attached, and is configured to reliably improve the adhesive strength of the adhesion suppression member 10 to the claw member 5F. This makes it possible to effectively prevent the adhesion suppression member 10 from peeling off from the claw member 5F due to impacts during excavation work, etc. Furthermore, it is possible to effectively prevent soil from adhering to the claw member 5F, making it possible to reliably prevent a decrease in work efficiency.

[0089] [Modification 2 of the First Embodiment] FIG. 14 is a schematic perspective view showing bucket 20 of Modified Example 2 according to the first embodiment. Bucket 20 of Modified Example 2 is equipped with a vibration generator 8A capable of transmitting vibrations to bucket 20. Vibrator 8A may be an electric vibration generator incorporating a vibration generating motor (not shown), or may be a fluid pressure vibration generator incorporating a fluid pressure cylinder (not shown). If vibration generator 8A is electric, power may be supplied from a battery mounted on backhoe 100. If vibration generator 8A is fluid pressure, fluid pressure may be supplied from a hydraulic circuit or the like provided in backhoe 100. There are no particular limitations on the location where vibration generator 8A is provided, and it may be provided in a location where bucket 20 will not be buried in the soil during excavation, such as bracket fixing plate 25, for example.

[0090] In the second modification, adhesion prevention member 10 is also affixed to the inner surface of bucket 20. Therefore, vibration generator 8A does not need to impart large vibrations to bucket 20; it is sufficient to impart vibrations that are sufficient to weaken the adhesive force between the surface of adhesion prevention member 10 and the soil. According to the second modification, by applying vibrations to bucket 20 from vibration generator 8A, it is possible to reliably weaken the adhesive force of the soil to the surface of adhesion prevention member 10. This effectively prevents excavated soil from adhering and accumulating inside bucket 20, and reliably prevents a decrease in work efficiency. Furthermore, because vibration generator 8A does not need to transmit large vibrations, noise can also be effectively suppressed.

[0091] [Modification 3 of the First Embodiment] 15 is a schematic perspective view showing an adhesion prevention member 10A of Modified Example 3 according to the first embodiment. The bucket 20 of Modified Example 3 is equipped with digging tines 5J that become thinner toward the tip. When the bucket 20 is equipped with digging tines 5J, soil does not accumulate between the digging tines 5J, but tends to adhere to and accumulate between the adapters 4A to 4E. For this reason, the adhesion prevention member 10A of Modified Example 3 is provided with approximately U-shaped slits 10C at positions corresponding to the adapters 4A to 4E. The slits 10C may be formed, for example, by cutting the end of the adhesion prevention member 10 with an electric saw or the like.

[0092] According to the third modification, by providing adhesion suppression members 10A between the adapters 4A to 4E of the edge plate portion 24, it is possible to effectively prevent soil from adhering and accumulating between the adapters 4A to 4E. Furthermore, the adhesion suppression members 10A can be attached in close contact with the edge plate portion 24, which makes it possible to effectively prevent the adhesion suppression members 10A from peeling off.

[0093] [Fourth Modification of the First Embodiment] FIG. 16 is a schematic perspective view showing a work tool of Modified Example 4 according to the first embodiment. The work tool of Modified Example 4 is a so-called skeleton bucket 20' used for surface improvement work, sludge reform work, and the like. The skeleton bucket 20' has a flat surface portion 21A and a curved surface portion 21B of the bottom plate portion 21 with a plurality of meshes 27. The skeleton bucket 20' can sift out the soil and stones, etc. stored in the storage portion 28 by excavating the soil and stones, etc., by dropping the soil and stones through the meshes 27. The configurations of the side plates 22, 23, edge plate portion 24, bracket fixing plate portion 25, etc. are substantially the same as those of the general bucket 20 described above, and therefore description thereof will be omitted.

[0094] In the fourth modification, the adhesion prevention member 10 is also affixed to the inner surface of the skeleton bucket 20′. Specifically, the adhesion prevention member 10 is affixed to the side plate portions 22, 23, the edge plate portion 24, and the portion of the bottom plate portion 21 where the mesh 27 is not provided (in the illustrated example, the portion of the curved surface portion 21B on the bracket fixing plate portion 25 side). As in the first embodiment, the adhesion prevention member 10 may be affixed using double-sided tape or adhesive. Note that the adhesion prevention member 10 may be fixed by spot welding, or it may also be fixed using rivets or bolts.

[0095] The adhesion suppression members 10 on the edge plate portion 24 and the bottom plate portion 21 (curved surface portion 21B) are attached so that their longitudinal direction is approximately parallel to the direction of the rotation axis R of the bucket 20′. In the illustrated example, one adhesion suppression member 10 is attached to each of the edge plate portion 24 and the bottom plate portion 21, but the number of adhesion suppression members 10 is not limited to this and may be any number appropriate depending on the specific dimensions of the edge plate portion 24 and the bottom plate portion 21. The adhesion suppression members 10 on the side plate portions 22, 23 are attached so that their longitudinal direction is approximately parallel to the surface direction of the flat surface portion 21A. In the illustrated example, three adhesion suppression members 10 are attached to each of the left side plate portion 22 and the right side plate portion 23, but the number of adhesion suppression members 10 is not limited to this and may be any number appropriate depending on the specific dimensions of the side plate portions 22, 23.

[0096] In this way, by attaching the adhesion suppression member 10 to the inner surface of the skeleton bucket 20', it is possible to effectively prevent the soil being sieved out from the earth and stones, etc. from adhering to and accumulating on the side plate portions 22, 23, the edge plate portion 24, etc. In other words, it becomes possible to efficiently separate the earth and stones from the excavated earth and stones, and it is possible to reliably improve work efficiency. In addition, because the earth and stones can be sieved out without swinging the skeleton bucket 20' significantly, it is possible to effectively suppress noise associated with swinging. In addition, there is less need for workers to approach the skeleton bucket 20' for cleaning, which also improves safety.

[0097] [Second embodiment] Figure 17 is a schematic side view showing a construction machine of a second embodiment. The construction machine of the second embodiment is, for example, a wheel loader 200 equipped with a bucket 30 as a working implement. The wheel loader 200 is equipped with a rear vehicle body 210 to which rear wheels 270 are attached, a front frame 220 to which front wheels 280 are attached, and a working device 230. The rear vehicle body 210 and the front frame 220 form an articulated structure in which they are connected to each other so as to be able to swing freely. A driver's cab 212 is provided in the rear vehicle body 210. The working device 230 is provided on the front frame 220.

[0098] The working device 230 includes a boom 231 whose base end is swingably attached to the front frame 220, and a bucket 30 swingably attached to the tip of the boom 231. The front frame 220 and the boom 231 are connected by a boom cylinder 232. When the boom cylinder 232 is extended or retracted, the boom 231 swings, that is, the tip of the boom 231 moves up and down. The working device 230 also includes a tilt arm 233 swingably attached to the boom 231, a tilt cylinder 234 that connects the front frame 220 and the base end of the tilt arm 233, and a tilt rod 235 that connects the tip of the tilt arm 233 and the bucket 30. When the tilt cylinder 234 is extended or retracted, the bucket 30 tilts. The wheel loader 200 performs loading and transporting operations of soil, mud, snow, etc. by appropriately combining the up and down movement of the boom 231, the tilting of the bucket 30, and the forward or reverse movement of the wheel loader 200, and adjusting the position and tilt attitude of the bucket 30.

[0099] Figure 18 is a schematic perspective view showing a bucket 30 according to the second embodiment. Bucket 30 is made of, for example, steel and is formed to be longer in the left-right direction than bucket 20 (see Figure 2) used in the aforementioned backhoe 100, etc. Specifically, bucket 30 has a bottom plate portion 31, a left side plate portion 32, a right side plate portion 33, a cutting edge 34, and a spill guard 35. Bottom plate portion 31 and side plate portions 32, 33 form a storage portion 38 for storing work objects such as earth, sand, mud, and snow.

[0100] The bottom plate 31 has a flat surface 31A extending substantially flat from the opening side of the storage section 38, and a curved surface 31B that curves convexly from the end of the flat surface 31A toward the outside of the storage section 38. A cutting edge 34 is fixed to the end of the flat surface 31A opposite the curved surface 31B. A spill guard 35 is fixed to the end of the curved surface 31B opposite the flat surface 31A. A bracket or the like that is pin-connected to a boom 231 or a tilt rod 234 (both shown in FIG. 17 ) is provided on the outer periphery of the curved surface 31B. The left side plate 32 is fixed to the left end of the bottom plate 31 by welding or the like so as to close the left opening of the bottom plate 31. The right side plate 33 is fixed to the right end of the bottom plate 31 by welding or the like so as to close the right opening of the bottom plate 31.

[0101] In the second embodiment, adhesion prevention members 10 are also installed on the inner surface of the bucket 30. Specifically, the adhesion prevention members 10 are installed on the bottom plate portion 31 (flat surface portion 31A, curved surface portion 31B) and the side plate portions 32 and 33. The adhesion prevention members 10 may be installed using double-sided tape or adhesive, or may be fixed by spot welding or the like. The adhesion prevention members 10 on the bottom plate portion 31 are attached so that their longitudinal direction is approximately parallel to the width direction of the bucket 30. In the illustrated example, the adhesion prevention members 10 are attached to the bottom plate portion 31 in four rows, but the number of rows of the adhesion prevention members 10 is not limited to this and may be any number appropriate depending on the specific dimensions of the bottom plate portion 31. The adhesion prevention members 10 on the side plate portions 32 and 33 are attached so that their longitudinal direction is approximately parallel to the surface direction of the flat surface portion 31A. In the illustrated example, three adhesion prevention members 10 are attached to each of the left side plate portion 32 and the right side plate portion 33, but the number of adhesion prevention members 10 is not limited to this, and an appropriate number of members can be attached depending on the specific dimensions of the side plate portions 32, 33.

[0102] In this way, by attaching the adhesion prevention member 10 to the inner surface of the bucket 30 used in the wheel loader 200, it is possible to effectively prevent work objects such as soil, mud, and snow from adhering to and accumulating on the inner surface of the bucket 30. That is, it is possible to effectively prevent work objects from remaining in the bucket 30 when loading the work objects from the bucket 30 onto a truck bed or when transporting the work objects to a predetermined location and releasing them from the bucket 30. This reliably improves work efficiency. Furthermore, because the work objects can be efficiently released from the bucket 30 without significantly swinging the bucket 30, it is possible to effectively suppress the generation of noise and vibration associated with swinging. Furthermore, it is less necessary for workers to approach the bucket 30 for cleaning, which also improves safety.

[0103] Although a description based on drawings will be omitted, a skeleton bucket such as that shown in Fig. 16 is an example of a bucket that can be attached to the wheel loader 200. The adhesion prevention member 10 of the present disclosure can also be applied to such a skeleton bucket for the wheel loader 200. In this case as well, the adhesion prevention member 10 can be installed on the side plate portions and the bottom plate portion of the skeleton bucket in the portions where no mesh is provided.

[0104] [Third embodiment] Figure 19 is a schematic side view showing a construction machine of a third embodiment. The construction machine of the third embodiment is a bulldozer 300 used for excavating, transporting, and leveling earth and sand in embankment work, landfill work, and the like. The bulldozer 300 includes a body frame 310, a pair of left and right traveling devices 320, and a working device 330. A driver's cab 311 is provided on the upper part of the body frame 310. The traveling device 320 has endless tracks 321 that enable travel on rough ground, etc. The traveling devices 320 are provided on the left and right lower parts of the body frame 310, respectively.

[0105] The working device 330 has a blade (blade) 40 as a working implement, support frames 331, 332, and a lifting cylinder 333. The base ends of the support frames 331, 332 are attached to the traveling device 320 or the vehicle body frame 310 so as to be able to swing freely. The blade 40 is attached to the tip ends of the support frames 331, 332 and pushes out earth, sand, mud, etc. The base end of the lifting cylinder 333 is attached to the vehicle body frame 310. The blade 40 is attached to the tip end of the lifting cylinder 332, and when the lifting cylinder 332 extends and retracts, the blade 40 moves up and down.

[0106] 20 is a schematic perspective view showing a blade 40 according to the third embodiment. The blade 40 is made of, for example, steel, and includes a blade body plate 41 that is curved so as to convex backward, a pair of side plates 42 and 43 joined to both left and right ends of the blade body plate 41, and a cutting edge 44 fixed to the lower end of the blade body plate 41. The rear surface of the blade body plate 41 is provided with brackets (not shown) to which the above-mentioned support frames 331 and 332 and the lift cylinder 332 (all shown in FIG. 19) are connected.

[0107] In the third embodiment, the adhesion prevention member 10 is installed on the front surface of the blade body plate 41 of the blade 40. Specifically, the adhesion prevention member 10 is installed so that its longitudinal direction is approximately parallel to the width direction of the blade body plate 41. Multiple adhesion prevention members 10 may be installed so as to be spread out over the entire front surface of the blade body plate 41, but it is preferable to install them with a predetermined clearance between them in the vertical and horizontal directions. The installation of the adhesion prevention members 10 is not particularly limited, but it is preferable to fix them by spot welding.

[0108] In this way, by installing the adhesion suppression member 10 on the front surface of the blade body plate 41, it is possible to effectively prevent work objects such as soil and mud from adhering to and accumulating on the front surface of the blade body plate 41. In other words, it is possible to reliably improve the efficiency of dozing and excavation work. In addition, since the operation of moving the blade 40 up and down to shake off adhering soil and the like is almost unnecessary or can be minimized, it is possible to effectively suppress the generation of noise and vibration. In addition, since there is less need for workers to approach the blade 40 for cleaning, safety can also be improved.

[0109] [Fourth embodiment] Figure 21 is a schematic side view showing a construction machine of a fourth embodiment. The construction machine of the fourth embodiment is an earth drill excavator 400 used in an earth drill method for cast-in-place pile construction. The earth drill excavator 400 is equipped with a drilling bucket 50 as a working tool. In the earth drill method, the drilling bucket 50 is rotated to excavate the ground while taking excavated earth and sand into the drilling bucket 50, and the taken-in earth and sand are repeatedly discharged to the surface, thereby excavating a borehole to a desired depth.

[0110] The earth drill excavator 400 includes a lifting device 410 such as a crane, a rotary drive 430 attached to a front frame 420 of the lifting device 410, and a kelly bar 450 suspended by a wire 441 from a boom 440 of the lifting device 410. The drilling bucket 50 is attached to the tip of the kelly bar 450, and the rotational force of the rotary drive 430 is transmitted via the kelly bar 450.

[0111] FIG. 22 is a schematic side view showing a drilling bucket 50 according to the fourth embodiment. FIG. 23 is a schematic vertical cross-sectional view showing a drilling bucket 50 according to the fourth embodiment. The drilling bucket 50 includes a cylindrical bucket body 51 and a disk-shaped bottom cover 52 that can close the lower end opening of the bucket body 51. The bucket body 51 and the bottom cover 52 are formed of, for example, steel. A socket 57 is provided at the upper end of the bucket body 51. The tip of the aforementioned kelly bar 450 (shown in FIG. 21) is connected to the socket 57 by a pin or the like.

[0112] Bottom lid 52 is attached to the lower edge of bucket body 51 via hinge mechanism 55 so as to be able to open and close freely. Bottom lid 52 closes the lower opening of bucket body 51 when excavating the ground (FIG. 22 shows the closed state). A plurality of bits 53 for excavating the ground are provided on the underside of bottom lid 52. Bottom lid 52 also has slits 54 for taking excavated earth and sand into bucket body 51. The excavated earth and sand taken into bucket body 51 is discharged to the ground by opening bottom lid 52 (FIG. 23 shows the open state).

[0113] As shown in FIG. 23 , the adhesion prevention members 10 are installed on the inner circumferential surface of the bucket body 51 and on the inner surface of the bottom cover 52 (the surface facing the internal space of the bucket body 51 when the bottom cover 52 is closed). Specifically, the adhesion prevention members 10 of the bucket body 51 are installed so that their longitudinal direction is approximately parallel to the axial direction of the bucket body 51 (vertically downward). The number of adhesion prevention members 10 is not particularly limited, but it is desirable to install four or more adhesion prevention members 10 at equal intervals in the circumferential direction. Multiple adhesion prevention members 10 may be installed in a spread pattern on the inner circumferential surface of the bucket body 51, but it is preferable to install them with a predetermined clearance between them in the circumferential direction. The adhesion prevention members 10 of the bottom cover 52 are installed so that their longitudinal direction is approximately vertical when the bottom cover 52 is open. The method for fixing the adhesion prevention members 10 is not particularly limited, but it is desirable to fix them by spot welding.

[0114] By providing the adhesion suppression member 10 on the inner peripheral surface of the bucket body 51 and the inner surface of the bottom cover 52 in this manner, it is possible to effectively prevent excavated soil taken into the bucket body 51 from adhering to and accumulating on the inner peripheral surface of the bucket body 51 or the inner surface of the bottom cover 52. In other words, it is possible to effectively prevent the excavated soil from remaining in the drilling bucket 50 when the excavated soil is discharged to the ground. This reliably improves work efficiency and also shortens the construction period for pile construction. Furthermore, since the operation of applying impacts to the drilling bucket 50 to shake off adhering soil from inside the drilling bucket 50 is almost unnecessary or can be minimized, it is possible to effectively prevent the generation of large noises and vibrations. Furthermore, since there is less need for workers to approach the drilling bucket 50 for cleaning, safety can also be improved.

[0115] [Fifth embodiment] 24 is a schematic side view showing a construction machine of a fifth embodiment. The construction machine of the fifth embodiment is an all-casing excavator 500 used in the all-casing method for cast-in-place pile construction. The all-casing excavator 500 is equipped with a hammer grab 60 as a working tool. In the all-casing method, a casing tube 590 is pressed into the ground while being rotated or swung, and the soil inside the casing tube 590 is removed to the surface by the hammer grab 60. This operation is repeated while appropriately adding more casing tubes 590, thereby excavating a borehole to a desired depth.

[0116] The all-casing excavator 500 is equipped with a tubing device 510 and a lifting device 530 such as a crane. The tubing device 510 presses a casing tube 590 into the ground by rotating or swinging it. A cutter bit (not shown) is attached to the tip of the casing tube 590. The lifting device 530 is equipped with a jib 531. A crown 533 that detachably holds the hammer grab 60 is attached to the tip of a lifting wire 532 hanging down from the jib 531. The hammer grab 60 is suspended from the lifting device 530 via a lifting operation wire 540 that is inserted through the center of the crown 533 so that it can be raised and lowered.

[0117] Fig. 25 is a schematic perspective view showing a hammer grab 60 according to the fifth embodiment in a closed state. Fig. 26 is a schematic perspective view showing a hammer grab 60 according to the fifth embodiment in an open state. The hammer grab 60 comprises a hammer grab body 61, a slide block 62 provided on the upper part of the hammer grab body 61, and a pair of shells 63, 64 attached to the lower end of the hammer grab body 61 via a hinge mechanism 65 so as to be able to open and close freely. The shells 63, 64 are formed in a roughly semi-conical shape, and come into contact with each other in the closed state to grasp the excavated earth and sand.

[0118] When performing excavation work, the lifting operation wire 540 (shown in FIG. 24) is reeled out, and the slide block 62 is separated from the crown 533 (shown in FIG. 24). When the slide block 62 is separated, the hammer grab 60 falls toward the ground, and the shells 63, 64 dig into the ground in an open state. Thereafter, when the lifting operation wire 540 is reeled in, the shells 63, 64 close and grab the excavated soil. In this state, the hammer grab 60 is pulled up, and the slide block 62 is engaged with the crown 533. When discharging the excavated soil to the ground, the lifting operation wire 540 is released, and the shells 63, 64 open due to the biasing force of a spring (not shown).

[0119] As shown in Fig. 26, the adhesion prevention members 10 are installed on the inner circumferential surfaces of the shells 63, 64. Specifically, the adhesion prevention members 10 are installed so that their longitudinal directions are oriented substantially vertically when the shells 63, 64 are open. There are no particular limitations on the method for fixing the adhesion prevention members 10, but spot welding is preferred. There are no particular limitations on the number of adhesion prevention members 10, but it is preferred that at least two or more members be installed on each shell 63, 64.

[0120] By installing the adhesion suppression member 10 on the inner peripheral surface of each shell 63, 64 in this manner, it is possible to effectively prevent the excavated soil grabbed by each shell 63, 64 from adhering to and accumulating on the inner peripheral surface of the shells 63, 64. In other words, it is possible to effectively prevent the excavated soil from remaining on the inner peripheral surface of the shells 63, 64 when the excavated soil is dumped onto the ground. This reliably improves work efficiency and shortens the construction period for pile construction. Furthermore, since the operation of applying impacts to the hammer grab 60 to shake off the adhering soil from each shell 63, 64 is almost unnecessary or can be minimized, it is possible to effectively prevent the generation of large noises and vibrations. Furthermore, since there is less need for workers to approach the hammer grab 60 for cleaning, safety can be improved.

[0121] [Sixth embodiment] FIG. 27 is a schematic side view showing a construction machine of a sixth embodiment. The construction machine of the sixth embodiment is a horizontal multi-axis excavator 600 used in diaphragm wall construction. The horizontal multi-axis excavator 600 is equipped with an excavator 620 having a rotary cutter 70 as a working tool. In diaphragm wall construction, the excavator 620 is suspended in a trench filled with stabilizing fluid, and the rotary cutter 70 is driven to rotate, thereby digging down the ground vertically. The excavated soil and sand are sucked up to the surface together with the stabilizing fluid, and after undergoing processes such as soil separation, are returned to the trench for recycling.

[0122] The horizontal multi-axis excavator 600 comprises a crawler-type lower carrier 610, a platform 611 rotatably attached to the upper part of the lower carrier 610, and a telescopic boom 612 mounted on the platform 611 so as to be able to be raised and lowered. The telescopic boom 612 is raised and lowered by a hoisting jack 613. An excavator 620 is suspended from the tip of the telescopic boom 612 via a wire 618 so as to be able to be raised and lowered. The platform 611 is also provided with a mud lifting hose reel 615 that winds up a mud lifting hose 614, a winch 616 that raises and lowers the excavator 620 via the wire 618, a hydraulic hose reel 617 that winds up a hydraulic hose, a cable reel (not shown) that winds up a measurement cable, etc.

[0123] The excavator 620 comprises an excavator main body 621. The excavator main body 621 is provided with a plurality of attitude maintaining plates 622 that abut against the inner wall surfaces of the trench to maintain the attitude of the excavator main body 621. A pair of hydraulically driven rotary cutters 70 are also mounted side by side at the bottom end of the excavator main body 621. A mud lifting pump 623 is provided approximately in the center of the excavator main body 621. The mud lifting pump 623 sucks excavated earth and stabilizing fluid through a suction port 624 located between the rotary cutters 70. The excavated earth and stabilizing fluid sucked through the suction port 624 are pumped to a mud lifting hose reel 615 via a mud lifting piping 625 and a mud lifting hose 614. The excavated earth and stabilizing fluid pumped to the mud lifting hose reel 615 are sent from a discharge port 619 to a mud treatment plant (not shown) for treatment.

[0124] Fig. 28 is a schematic view of a rotary cutter 70 according to a sixth embodiment as viewed from the direction of the rotation axis. Fig. 29 is a schematic view of the rotary cutter 70 according to the sixth embodiment as viewed from the radial direction. The rotary cutter 70 includes a cylindrical rotating drum 71, a blade 72 having a substantially trapezoidal plate shape and provided so as to protrude radially from the outer circumferential surface of the rotating drum 71, and a cutter bit 74 fixed to the tip of the blade 72 via a holder 73. The multiple blades 72 are provided at a predetermined pitch in the circumferential direction on the outer circumferential surface of the rotating drum 71.

[0125] Here, if excavated soil and sand adhere to and accumulate on the blade 72 of the rotary cutter 70, the created mixed soil will accumulate below the excavator body 621, causing a significant decrease in the excavation speed. In the sixth embodiment, the adhesion prevention member 10 is installed on the surface of the blade 72 of the rotary cutter 70. Specifically, the adhesion prevention member 10 is installed on the surface of the blade 72 facing the excavator body 621 (hereinafter referred to as the inner surface) and on the surface of the blade 72 opposite the excavator body 621 (hereinafter referred to as the outer surface). The adhesion prevention member 10 is installed so that its longitudinal direction is approximately parallel to the tangential direction of the rotating drum 71. There are no particular limitations on the method for fixing the adhesion prevention member 10, but it is preferable that it be fixed by spot welding.

[0126] In this way, by installing the adhesion suppression member 10 on the inner and outer surfaces of the blade 72 of the rotary cutter 70, it is possible to effectively prevent excavated soil from adhering to and accumulating on the inner and outer surfaces of the blade 72. In other words, it is possible to effectively prevent the created mixed soil from accumulating below the excavator body 621, and it is also possible to effectively suppress a decrease in excavation speed. This makes it possible to shorten the construction period for diaphragm wall construction while reliably improving work efficiency. In addition, the mixing ratio of the mixed soil and the stabilizing liquid becomes stable, making it possible to improve construction quality. Furthermore, it is also possible to improve safety because there is less need for workers to approach the rotary cutter 70 for cleaning.

[0127] Although not illustrated, the adhesion suppression effect of soil and sand can be further improved by installing the adhesion suppression member 10 not only on the rotary cutter 70 but also on the surface of the excavator body 621.

[0128] [Seventh embodiment] Figure 30 is a schematic side view showing a construction machine of a seventh embodiment. The construction machine of the seventh embodiment is a ground improvement device 700 used in the power blender method for mid-layer mixing treatment work and the like. The ground improvement device 700 is equipped with a trencher-type agitator mixer 80 as a working tool. In the power blender method, an improvement material such as a cement-based solidification material is sprayed onto the ground from the trencher-type agitator mixer 80, and the agitator blades 88 equipped on the trencher-type agitator mixer 80 excavate the ground and agitate and mix the improvement material, thereby continuously creating a stable improved body.

[0129] The soil improvement device 700 includes a backhoe 100 as a base machine. The backhoe 100 has essentially the same structure as that shown in FIG. 1 , and therefore a detailed description thereof will be omitted. The trencher-type agitator / mixer 80 is attached to the tip of the arm 142 of the backhoe 100. Specifically, the trencher-type agitator / mixer 80 includes a substantially rectangular columnar frame 81, a drive sprocket 82 attached to the upper end of the frame 81, a driven sprocket 83 attached to the lower end of the frame 81, an endless drive chain 84 wound around each of the sprockets 82 and 83, multiple chain tensioners 85 attached to the frame 81, and a joint 86 attached to the upper end of the frame 81. The joint 86 connects the frame 81 to the tip of the arm 142 so that the frame 81 can rotate around its longitudinal axis. A discharge port 87 for spraying the improvement material is provided at the lower end of the frame 81. A plurality of stirring blades 88 are provided on the outer periphery of the drive chain 84 at a predetermined pitch.

[0130] 31, the adhesion prevention member 10 is installed on the surface of a frame 81 of a trencher-type agitating mixer 80. Specifically, the adhesion prevention member 10 is installed on the four sides of the frame 81, which is formed in a rectangular column shape, with the longitudinal direction of the adhesion prevention member 10 being approximately parallel to the longitudinal direction of the frame 81. There are no particular limitations on the method for fixing the adhesion prevention member 10, but it is preferable to fix it by spot welding.

[0131] In this way, by installing the adhesion suppression member 10 over the entire surface of the frame 81 of the trencher-type agitator / mixer 80, it is possible to effectively suppress the adhesion of excavated soil to the surface of the frame 81. In other words, it is possible to prevent the accumulation of excavated soil between the frame 81 and the drive chain 84. This allows the agitator blades 88 to efficiently excavate the ground and mix and mix the improvement material, shortening the construction period and improving the construction quality. In addition, there is less need for workers to approach the trencher-type agitator / mixer 80 for cleaning, which also improves safety.

[0132] [Modification of the Seventh Embodiment] The location where the adhesion prevention member 10 is to be installed is not limited to the frame 81 of the trencher-type agitator mixer 80, and it can also be installed on the agitator 88. FIG. 32 is a schematic plan view showing the agitator 88. FIG. 33 is a schematic side view showing the agitator 80. The agitator 88 includes a long, plate-shaped base plate 88A fixed to the outer periphery of the drive chain 84, a plurality of digging blades 88B fixed to the surface of the base plate 88A opposite the drive chain 84 (hereinafter referred to as the front surface), and a long, plate-shaped agitator blade 88C fixed to the surface of the base plate 88A opposite the digging blades 88B. The multiple digging blades 88B are arranged on the front surface of the base plate 88A at predetermined intervals in the longitudinal direction of the base plate 88A. The agitator blade 88C is provided on the back surface of the base plate 88A at approximately right angles to the longitudinal direction of the base plate 88A.

[0133] In a modification of the seventh embodiment, the adhesion suppression member 10 is installed on the surface of the base plate 88A (between the excavation blades 88B, 88B) and on the surface of the mixing blade 88C. By installing the adhesion suppression member 10 on the surface of the base plate 88A of the mixing blade 88 and the mixing blade 88C in this way, it becomes possible to effectively suppress the adhesion and accumulation of excavated soil and sand on the mixing blade 80, and it becomes possible to further improve work efficiency and construction quality.

[0134] [others] The adhesion suppression member 10 can be widely applied to working tools of construction machinery other than the construction machinery of the above embodiment. For example, if the adhesion suppression member 10 of the present disclosure is installed on the blade of a motor grader or the apron of a scraper, the adhesion suppression effect of excavated soil and sand can be obtained.

[0135] In the above embodiment, the work target of the construction machine has been described as soil, mud, snow, etc., but the same effects can be achieved with adhesive work targets such as bentonite, concrete, mortar, etc., regardless of whether the work target is liquid, semi-solid, or solid. While the adhesion prevention member 10 has been described as having an upper layer of resin material 12 and a lower layer of metal material 11, the lower layer can be formed of a base material other than metal as long as it is a material that can be bonded to the resin material 12. The adhesion prevention member 10 may be of any size that allows multiple sheets to be attached to the bottom plate 21 and side plate portions 22, 23 of the bucket 20. The shape of the adhesion prevention member 10 is not limited to a rectangular strip (rectangular plate) and may be a circle, ellipse, triangle, or polygon with five or more sides. [Explanation of symbols]

[0136] 10...adhesion prevention member, 11...metal material, 12...resin material, 20...bucket, 20'...skeleton bucket, 20A...bucket body portion, 21...bottom plate portion, 21A...flat surface portion, 21B...curved surface portion, 22...left side plate portion, 23...right side plate portion, 24...edge plate portion, 25...bracket fixing plate portion, 27...grid, 4A to 4E...adapter, 5A to 5E...claw portion, 6L, 6R...bracket, 30...bucket, 30A...bucket body portion, 31...bottom plate portion, 31A...flat surface portion, 31B...curved surface portion, 32...left side plate portion, 33...right side plate portion, 40...blade, 41...blade body plate, 50...drilling bucket, 51 ...Bucket body, 52...Bottom cover, 60...Hammer grab, 63, 64...Shell, 70...Rotary cutter, 72...Blade, 80...Trencher type agitator / mixer, 81...Frame, 88...Agitator blade, 100...Backhoe, 142...Arm, 143...Bucket link, 150-152...Cylinder, 200...Wheel loader, 200...Boom, 300...Bulldozer, 331, 332...Support frame, 400...Earth drill excavator, 450...Kelly bar, 500...All casing excavator, 530...Lifting device, 600...Horizontal multi-axis excavator, 621...Excavator body, 700...Ground improvement device

Claims

1. An adhesion suppression member that is rotatably attached to a construction machine and that suppresses adhesion of a work object to a bucket having a bottom plate portion that forms a storage portion for storing the excavated work object, It has a two-layer structure in which a metal material formed in a rectangular plate and a resin material made of fluororesin formed in a rectangular plate are bonded together, The metal material has a length in the short side direction of 90 to 110 mm, The length of the resin material in the short side direction is 90 to 105 mm, The surface of the resin material opposite to the surface joined to the metal material forms part of the surface of the bucket that comes into contact with the work object, and multiple sheets are configured to be installed in parallel and detachably at a clearance of 20 to 90 mm apart on the bottom plate portion so that the longitudinal direction is approximately parallel to the rotation axis direction of the bucket. An adhesion suppression member characterized by:

2. The adhesion suppression member according to claim 1, the bucket further includes, in addition to the bottom plate portion, a side plate portion that forms the storage portion, and the bottom plate portion has a flat surface portion extending from an opening side of the storage portion, The base plate portion and the side plate portion are configured to be detachably installed so that the longitudinal direction is parallel to the surface direction of the flat surface portion. An adhesion suppression member characterized by:

3. An adhesion suppression member as described in claim 1, The metal material is formed to be longer in the short direction than the resin material, and an edge of the metal material is configured to protrude beyond the resin material. An adhesion suppression member characterized by:

4. A bucket equipped with an adhesion suppression member described in any one of claims 1 to 3.

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