Cutting system and cutting method

Abstract

To efficiently cut a large-sized object.SOLUTION: A cutting system comprises: a bandsaw part which includes a first cutting part with a belt-like saw blade that is driven to move in a first travel direction, and a second cutting part with a saw blade that is driven to move in a second travel direction opposite to the first travel direction; first rotation bodies which are arranged at one side relative to the first cutting part and the second cutting part and on which the bandsaw part is hung; second rotation bodies which are arranged at the other side relative to the first cutting part and the second cutting part and on which the bandsaw part is hung; and a drive part which moves relative positions of the bandsaw part, the first rotation bodies, and the second rotation bodies with respect to a cutting object, in a movement direction along the width direction of the saw blade of the bandsaw part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to cutting systems and methods. [Background technology]

[0002] For example, a cutting device using a saw blade is known. For example, Patent Document 1 discloses a cutting device in which a band-shaped saw blade is hung between a driving pulley and a driven pulley. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 1-272401 Summary of the Invention [Problem to be solved by the invention]

[0004] The cutting device disclosed in Patent Document 1 is a device for cutting small objects such as frozen foods and twigs, and it is difficult to cut large objects. Furthermore, when using the cutting device of Patent Document 1 to cut large objects, it is required to cut efficiently.

[0005] The present disclosure has been made in view of the above, and aims to provide a cutting system and a cutting method that can efficiently cut large objects. [Means for solving the problem]

[0006] The cutting device of the present disclosure comprises a band saw unit having a band-shaped saw blade, including a first cutting section where the saw blade is driven to move in a first direction of travel, and a second cutting section where the saw blade is driven to move in a second direction of travel opposite to the first direction of travel; a first rotating body arranged on one side of the first cutting section and the second cutting section and on which the band saw unit is hung; a second rotating body arranged on the other side of the first cutting section and the second cutting section and on which the band saw unit is hung; and a drive unit that moves the relative positions of the band saw unit, the first rotating body, and the second rotating body with respect to the object to be cut in a movement direction along the width direction of the saw blade of the band saw unit.

[0007] The cutting method disclosed herein is a cutting method using a cutting system including a band saw unit having a band-shaped saw blade, the band saw unit including a first cutting section where the saw blade is driven to move in a first direction of travel, and a second cutting section where the saw blade is driven to move in a second direction of travel opposite to the first direction of travel, a first rotating body located on one side of the first cutting section and the second cutting section and on which the band saw unit is hung, and a second rotating body located on the other side of the first cutting section and the second cutting section and on which the band saw unit is hung, and includes a step of moving the relative positions of the band saw unit, the first rotating body, and the second rotating body with respect to the object to be cut in a moving direction along the width direction of the saw blade of the band saw unit. [Effects of the Invention]

[0008] According to the present disclosure, large objects can be cut efficiently. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram of a cutting system according to a first embodiment. [Figure 2] FIG. 2 is a schematic top view of the drive unit. [Figure 3] FIG. 3 is a diagram for explaining the band saw unit. [Figure 4] FIG. 4 is a block diagram of the control device. [Figure 5]FIG. 5 is a flowchart illustrating an example of processing by the control device. [Figure 6] FIG. 6 is a schematic top view of a drive unit according to a first modified example. [Figure 7] FIG. 7 is a schematic top view of a case where a plurality of cutting devices of the first modified example are used. [Figure 8] FIG. 8 is a schematic side view of the second modified example. [Figure 9] FIG. 9 is a schematic top view of a drive unit according to a second modified example. [Figure 10] FIG. 10 is a schematic top view of a case where a plurality of cutting devices of the second modified example are used. [Figure 11] FIG. 11 is a schematic top view of a case where a plurality of cutting devices of the second modified example are used. DETAILED DESCRIPTION OF THE INVENTION

[0010] Preferred embodiments of the present disclosure will be described in detail below with reference to the drawings. Note that the present disclosure is not limited to these embodiments, and when there are multiple embodiments, the present disclosure also includes configurations that combine the various embodiments. Furthermore, the components in the embodiments include those that can be easily imagined by a person skilled in the art, those that are substantially identical, and those that are within the so-called equivalent range. Furthermore, the components in the embodiments described below can be variously omitted, substituted, or modified without departing from the spirit of the present invention.

[0011] [First embodiment] <Cutting System> A cutting system 1 according to a first embodiment will be described with reference to Figures 1 to 3. Figure 1 is a schematic diagram of the cutting system according to the first embodiment. Figure 2 is a schematic top view of the cutting device according to the first embodiment. Figure 3 is a diagram for explaining the band saw unit.

[0012] The cutting system 1 cuts and dismantles large objects, such as ships and power plant equipment. The cutting system 1 is not limited to dismantling. It may also be used to cut large materials during the manufacturing process of a product, producing parts. In the first embodiment, the cutting system 1 includes multiple cutting devices 10 and a control device 50. In the example shown in FIGS. 1 and 2, the cutting system 1 includes two cutting devices 10: 10A and 10B. In this example, the cutting device 10A is disposed outside the cutting device 10B, and the cutting device 10B is disposed inside the cutting device 10A. However, the arrangement, size, and number of the cutting devices may be arbitrary. The cutting system 1 may include any number of cutting devices 10. As will be described in detail later, the cutting system 1 may include only one cutting device 10, as long as the cutting device 10 includes a first cutting unit 24 and a second cutting unit 26.

[0013] Hereinafter, one direction in a coordinate system based on a predetermined position of the cutting system 1 is defined as the X direction, the direction perpendicular to the X direction is defined as the Y direction, and the direction perpendicular to the X and Y directions is defined as the Z direction.

[0014] <Cutting device> As shown in FIGS. 1 and 2, the cutting device 10 includes a base unit 12 and a drive unit 20.

[0015] (Base unit) The base unit 12 is a mechanism that supports the drive unit 20. For example, the base unit 12 supports the drive unit 20 so that the drive unit 20 can move in the Z direction, which is the movement direction described below, while being fixed in position relative to the ground. As shown in FIG. 1 , the base unit 12 has a base portion 14, a support portion 16, and a guide 18.

[0016] The base portions 14 are portions that come into contact with the ground and serve as a base. The base portions 14 are provided on one side and the other side in the X direction.

[0017] The support pillars 16 are columnar members extending from the respective bases 14 in the Z direction.

[0018] The guide 18 is provided on the support column 16 and is a mechanism to which the drive unit 20, which will be described later, is attached so as to be movable in the Z direction. For example, the guide 18 may be a rail that moves the drive unit 20, or may be a mechanism that combines an H-beam and a member that fits into the H-beam to slide the drive unit 20 (see FIG. 6). The guide 18 may also be a mechanism made up of a rack and pinion, and may have any structure.

[0019] (Drive unit) The drive unit 20 is a mechanism that cuts the object W. The drive unit 20 has a band saw part 22, a first rotor 28, a second rotor 32, and a drive part 40.

[0020] The drive unit 20 is disposed between one support column 16 and the other support column 16 in the X direction, and is supported so as to be movable in the Z direction relative to each support column 16. In this embodiment, the drive unit 20 is provided with connection portions 30, 34 on one and the other sides in the X direction. The connection portion 30 of the drive unit 20 is attached to the guide 18 on one side in the X direction so as to be movable in the Z direction, and the connection portion 34 is attached to the guide 18 on the other side in the X direction so as to be movable in the Z direction.

[0021] (rotating body) The first rotating body 28 is provided on one side of the drive unit 20 in the X direction. The first rotating body 28 has a first rotation shaft 29 extending in the Z direction and rotates around the first rotation shaft 29 as the center of rotation. More specifically, the first rotating body 28 rotates in a circumferential direction, with the Z direction being the axial direction, by the power of a motor M provided in the drive unit 20. Note that in the example shown in FIGS. 1 and 2 , the first rotating body 28 and the first rotation shaft 29 are provided on the Z direction side of the connection portion 30, and the motor M is built into the connection portion 30. However, the arrangement of the first rotating body 28, the first rotation shaft 29, and the motor M is not limited to this and may be arbitrary. Furthermore, in the example of the present embodiment, two first rotating bodies 28 are provided on one side of the drive unit 20 in the X direction, but the number of first rotating bodies 28 is not limited to this and may be arbitrary.

[0022] The second rotating body 32 is provided on the other side of the drive unit 20 in the X direction. The band saw unit 22 is hung on the second rotating body 32. The second rotating body 32 has a second rotating shaft 33 extending in the Z direction and rotates around the second rotating shaft 33. More specifically, the second rotating body 32 rotates in a circumferential direction, with the Z direction being the axial direction, by the power of a motor M provided in the drive unit 20. Note that in the example shown in FIGS. 1 and 2 , the second rotating body 32 and the second rotating shaft 33 are provided on the Z direction side of the connecting portion 34, and the motor M is built into the connecting portion 34. However, the arrangement of the second rotating body 32, the second rotating shaft 33, and the motor M is not limited to this and may be arbitrary. Furthermore, in the example of this embodiment, two second rotating bodies 32 are provided on the other side of the drive unit 20 in the X direction, but the number of second rotating bodies 32 is not limited to this and may be arbitrary. Furthermore, the second rotor 32 may not have the motor M, and may be rotated by transmitting the rotation of the first rotor 28 via the band saw unit 22.

[0023] (band saw part) The band saw unit 22 is a band-shaped saw blade. The band saw unit 22 is hung on the first rotor 28 and the second rotor 32 so that its width direction (the direction along the width of the saw blade), which is perpendicular to the band-shaped extension direction, is aligned with the Z direction. In other words, the band saw unit 22 is hung on the first rotor 28 and the second rotor 32 so that its inner surface is in contact with the outer peripheral surfaces of the first rotor 28 and the second rotor 32 and the cutting blade 23, which will be described later, faces the side on which the object W is placed in the Z direction. As the first rotor 28 and the second rotor 32 rotate, the band saw unit 22 rotates together with these rotors and moves along the band-shaped extension direction. By rotating, the band saw unit 22 can cut the object W placed between a pair of support members 16 facing each other in the X direction. The object W is placed between the support members 16.

[0024] As the band saw unit 22 advances along the extension direction in a band-like shape, its position in the extension direction relative to the first rotating body 28 and the second rotating body 32 changes, but its position in the Z direction is preferably fixed relative to the first rotating body 28 and the second rotating body 32. This allows the band saw unit 22 to move in the Z direction integrally with the first rotating body 28 and the second rotating body 32. Any structure may be used to fix the band saw unit 22 to the first rotating body 28 and the second rotating body 32. For example, walls may be formed at both ends of the first rotating body 28 and the second rotating body 32 in the Z direction to prevent the band saw unit 22 from coming off in the Z direction.

[0025] The band saw unit 22 includes a first cutting unit 24, which is a portion where the saw blade is driven to move in a first traveling direction A, and a second cutting unit 26, which is a portion where the saw blade is driven to move in a second traveling direction B opposite to the first traveling direction A. In other words, the band saw unit 22 includes the first cutting unit 24 that travels in the first traveling direction A, which is perpendicular to the width direction (Z direction), and the second cutting unit 26 that travels in the second traveling direction B, which is perpendicular to the width direction (Z direction) and opposite to the first traveling direction A. As described above, the band saw unit 22 travels along the extension direction extending in a band shape due to the rotation of the rotor, and therefore, it can also be said that the first traveling direction A and the second traveling direction B are along the extension direction of the band saw unit 22. In this embodiment, the cutting device 10A and the cutting device 10B are driven so that the first rotor 28 and the second rotor 32 rotate in opposite directions. Therefore, the first band saw blade 22A of the cutting device 10A and the second band saw blade 22B of the cutting device 10B move in opposite directions. Therefore, in this embodiment, the first band saw blade 22A of the cutting device 10A includes a first cutting portion 24 moving in a first moving direction A, and the second band saw blade 22B of the cutting device 10B includes a second cutting portion 26 moving in a second moving direction B. This reduces the cutting reaction force and enables large materials to be cut appropriately. Furthermore, by using two band saw blades, even if one band saw blade becomes uncut, the other band saw blade can be used to cut the material. In the example shown in FIG. 2, the first moving direction A and the second moving direction B are opposite to each other. However, this is not limited thereto, and the first moving direction A and the second moving direction B may be opposite to each other. In the example of FIG. 2, the first traveling direction A and the second traveling direction B are aligned along the X direction, but are not limited to this and may be aligned along the Y direction, for example.

[0026] As shown in FIG. 3, specifically, the saw blade of the band saw unit 22 is preferably sized to be able to cut an object having a thickness of 50 mm or more. The saw blade of the band saw unit 22 is preferably made of tough spring steel. The cutting blade 23 is preferably changed depending on the material to be cut, and may be made of, for example, high-speed steel, cemented carbide, diamond, or the like, and the cutting edge may be coated with titanium nitride or the like. The band saw unit 22 may have cutting blades 23 on both sides. When cutting underwater, the material is preferably rust-resistant. The material and size of the band saw unit 22 can be changed as appropriate.

[0027] (Drive unit) The drive unit 40 is a mechanism that moves the relative position of the drive unit 20 with respect to the object W in the Z direction. Here, since the band saw unit 22 is disposed so that its width direction is along the Z direction, it can also be said that the drive unit 40 moves the relative position of the drive unit 20 with respect to the object W in a movement direction along the width direction of the band saw unit 22. In this embodiment, the drive unit 40 moves the relative position of the drive unit 20 with respect to the object W by moving the drive unit 20 in the Z direction. However, without being limited thereto, the drive unit 40 may also move the relative position of the drive unit 20 with respect to the object W by moving the object W in the Z direction.

[0028] The driving section 40 may be, for example, an actuator that moves the driving unit 20 in the Z direction along the guide 18. That is, the driving section 40 may move the driving unit 20 by the power of the actuator. Note that, although the driving section 40 is built into the support section 16 in the example of FIG. 1, the position where the driving section 40 is provided is not limited thereto and may be any position.

[0029] In this embodiment, the drive unit 40 includes a first drive unit A1 that moves the relative position of the first rotating body 28 with respect to the object W, and a second drive unit A2 that moves the relative position of the second rotating body 32 with respect to the object W. The first drive unit A1 is controlled by the control device 50 to control the position of the first rotating body 28 in accordance with the position of the second rotating body 32 in the Z direction. The first drive unit A1 preferably controls the position of the first rotating body 28 in the Z direction so that the position of the first rotating body 28 is within a predetermined length range with respect to the position of the second rotating body 32 in the Z direction (preferably so that the position is the same). Similarly, the second drive unit A2 is controlled by the control device 50 to control the position of the second rotating body 32 in accordance with the position of the first rotating body 28 in the Z direction. The second drive unit A2 preferably controls the position of the second rotating body 32 so that the position of the second rotating body 32 in the Z direction is within a predetermined length range with respect to the position of the first rotating body 28 in the Z direction (preferably so that the position is the same).

[0030] (Control device) Fig. 4 is a schematic block diagram of the control device 50. The control device 50 is a computer that performs information processing and controls the movement of the drive unit 20 of the cutting system 1. As shown in Fig. 4, the control device 50 has a memory unit 54, a communication unit 56, and a control unit 58.

[0031] In this embodiment, each cutting device 10 has a position detection sensor 52 that detects the position in the Z direction of the first rotating body 28 and the second rotating body 32. The position detection sensor 52 is attached to the first rotating body 28 and the second rotating body 32 (see FIG. 1). The position detection sensor 52 is preferably attached to the rotating body, but may also be built into the connecting unit 30, 34 or the driving unit 40, and the attachment position may be arbitrary.

[0032] The storage unit 54 is a memory that stores various information such as the calculation contents and programs of the control unit 58, and includes at least one of a main storage device such as a RAM (Random Access Memory) and a ROM (Read Only Memory), and an external storage device such as an HDD (Hard Disk Drive).

[0033] The communication unit 56 is a communication module that communicates with an external device, such as an antenna. The control device 50 communicates with the external device via wireless communication, but wired communication may also be used, and any communication method may be used.

[0034] The control unit 58 is a calculation device and includes a calculation circuit such as a CPU (Central Processing Unit). The control unit 58 includes a position acquisition unit 60, a position control unit 62, and a rotating body control unit 64. The control unit 58 realizes the position acquisition unit 60, the position control unit 62, and the rotating body control unit 64 by reading and executing a program (software) from the storage unit 54. The control unit 58 executes these processes using a single CPU, or may be provided with multiple CPUs and execute the processes using the multiple CPUs. At least a portion of the processes performed by the position acquisition unit 60, the position control unit 62, and the rotating body control unit 64 may be implemented using hardware circuits.

[0035] The position acquisition unit 60 acquires the positions in the Z direction of the first rotating body 28 and the second rotating body 32 detected by the position detection sensor 52. The position acquisition unit 60 may store the positions in the Z direction of the first rotating body 28 and the second rotating body 32 detected by the position detection sensor 52 in the memory unit 54.

[0036] The position control unit 62 controls the drive unit 40 to move the drive unit 20 in the Z direction. Specifically, the position control unit 62 reads the position of the first rotating body 28 in the Z direction from the memory unit 54, and controls the second drive unit A2 based on the position of the first rotating body 28 in the Z direction, thereby controlling the movement of the second rotating body 32 in the Z direction. The position control unit 62 preferably controls the position of the second rotating body 32 so that the position of the first rotating body 28 in the Z direction and the position of the second rotating body 32 in the Z direction are within a predetermined length range (preferably so that they are the same position). Furthermore, the position control unit 62 reads the position of the second rotating body 32 in the Z direction from the memory unit 54, and controls the first drive unit A1 based on the position of the second rotating body 32 in the Z direction, thereby controlling the movement of the first rotating body 28 in the Z direction. The position control unit 62 preferably controls the position of the first rotating body 28 so that the position of the first rotating body 28 in the Z direction and the position of the second rotating body 32 in the Z direction are within a predetermined length range (preferably so that they are the same position). In other words, the position control unit 62 controls the movement of the first rotating body 28 and the second rotating body 32 so that the positions of the second rotating body 32 and the first rotating body 28 are synchronized. By doing so, even if the band saw unit 22 is tilted with respect to the cutting surface while cutting the workpiece W, the band saw unit 22 can be made horizontal. Note that in this embodiment, the position control unit 62 controls the positions of both the first rotating body 28 and the second rotating body 32 according to the position of the other rotating body, but this is not limited thereto, and only one of the first rotating body 28 and the second rotating body 32 may be controlled according to the position of the other rotating body.

[0037] The rotating body control unit 64 controls the rotation speeds of the first rotating body 28 and the second rotating body 32. Specifically, the rotating body control unit 64 controls the start and end of rotation of the rotating bodies when cutting of the object W begins and ends. The rotating body control unit 64 controls the rotation speeds of the rotating bodies during cutting in accordance with the cutting depth of the band saw unit 22. Note that the rotating body control unit 64 may control each rotating body independently.

[0038] In this embodiment, the position of the first rotating body 28 and the second rotating body 32 in the Z direction is controlled using the position detection sensor 52, but a force sensor may be used to obtain a reaction force and the position in the Z direction may be controlled based on the obtained reaction force, or the position detection sensor 52 and a force sensor may be combined for control.

[0039] (Processing flow) FIG. 5 is a flowchart illustrating an example of processing by the control device.

[0040] The control device 50 acquires the positions of the first rotating body 28 and the second rotating body 32 in the Z direction (step S10). The position acquisition unit 60 acquires the positions of the first rotating body 28 and the second rotating body 32 in the Z direction detected by the position detection sensor 52.

[0041] Based on the positions of the first rotating body 28 and the second rotating body 32 in the Z direction, the control device 50 moves the first rotating body 28 and the second rotating body 32 in the Z direction so that the positions of the first rotating body 28 and the second rotating body 32 in the Z direction are within a predetermined length (step S12). By doing so, even if the band saw unit 22 is tilted with respect to the cutting surface while cutting the object W, the band saw unit 22 can be made horizontal. However, such control to synchronize the positions of the first rotating body 28 and the second rotating body 32 is not essential.

[0042] [First Modification] 6 is a schematic top view of a drive unit of the first modified example. Detailed description of the same parts of the first modified example as those of the first embodiment will be omitted.

[0043] The cutting system 1 according to the first modification includes a cutting device 10C. The first modification differs from the first embodiment in that the band saw unit 22 of one cutting device 10C includes a first cutting section 24 that moves in a first traveling direction A and a second cutting section 26 that moves in a second traveling direction B.

[0044] The cutting device 10C has one first rotor 28 and two second rotors 32. Therefore, when viewed from the Z direction, the band saw unit 22 of the cutting device 10C is arranged in a substantially triangular shape with each rotor as a vertex. The section of the band saw unit 22 of the cutting device 10C from one second rotor 32 to the first rotor 28 forms the first cutting section 24 that moves in the first direction of travel A, and the section from the first rotor 28 to the other second rotor 32 forms the second cutting section 26 that moves in the second direction of travel B.

[0045] As described above, the band saw unit 22 of one cutting device 10 may include the first cutting unit 24 and the second cutting unit 26, as in the first modified example, or the first cutting unit 24 and the second cutting unit 26 may be configured on a plurality of cutting devices 10, as in the first embodiment. In either case, the object W can be cut by the first cutting unit 24 and the second cutting unit 26, which advance in directions including vector components that are opposite to each other in the traveling direction, so that the reaction force can be suppressed and cutting can be performed appropriately.

[0046] In the example of Figure 6, the band saw portion 22 is approximately triangular when viewed from the Z direction, but this is not limited to this and may be any shape as long as it includes the first cutting portion 24 and the second cutting portion 26.

[0047] FIG. 7 is a schematic top view of a case where a plurality of cutting devices of the first modified example are used.

[0048] As shown in Fig. 7, a cutting system may be configured by arranging a plurality of cutting devices 10C. In the cutting system shown in the example of Fig. 7, the first rotating body 28 and the second rotating body 32 of each cutting device 10C are arranged to face each other with the object W therebetween, and the object W is cut. In this manner, different cutting locations of the object W can be cut simultaneously. Furthermore, by using and driving a plurality of cutting devices 10C simultaneously, multiple locations can be cut simultaneously. This allows for efficient cutting.

[0049] [Second Modification] A cutting device 10D of a second modified example will be described with reference to Figures 8 and 9. Figure 8 is a schematic side view of the second modified example. Figure 9 is a schematic top view of a drive unit of the second modified example. Detailed descriptions of the same parts of the second modified example as those of the first embodiment will be omitted.

[0050] Similar to the first modification, the cutting device 10D according to the second modification has a single band saw unit 22 that constitutes a first cutting section 24 and a second cutting section 26. In the second modification, a first traveling direction A of the first cutting section 24 and a second traveling direction B of the second cutting section 26 are opposed to each other. The distance D between the first cutting section 24 and the second cutting section 26 is preferably set to, for example, approximately 0.5 mm or more and 10 mm or less.

[0051] 9, the cutting device 10D has a first adjustment rotor 28A on one side in the X direction that adjusts the distance (predetermined distance) D between the first cutting unit 24 and the second cutting unit 26. The cutting device 10D also has a second adjustment rotor 32A on the other side in the X direction that adjusts the distance D between the first cutting unit 24 and the second cutting unit 26.

[0052] The first adjustment rotors 28A are arranged as a pair on the other side in the X direction (left side in FIG. 9 ) of the first rotor 28. The first adjustment rotors 28A are arranged side by side in the Y direction. Each first adjustment rotor 28A has a first adjustment rotation shaft 29A extending in the Z direction and is rotatable around the first adjustment rotation shaft 29A as the center of rotation. The outer circumferential surface of each first adjustment rotor 28A contacts the outer circumferential surface of the band saw unit 22. The first adjustment rotors 28A can be moved in the Y direction, for example, under the control of the control device 50. This makes it possible to press or release the contacting portion of the band saw unit 22 in the Y direction, thereby adjusting the predetermined distance D between the first cutting unit 24 and the second cutting unit 26.

[0053] The second adjustment rotors 32A are arranged in pairs on one side in the X direction (the right side in FIG. 9 ) of the second rotor 32. The second adjustment rotors 32A are arranged side by side in the Y direction. Each second adjustment rotor 32A has a second adjustment rotation shaft 33A extending in the Z direction and is rotatable around the second adjustment rotation shaft 33A as the center of rotation. The outer circumferential surface of each second adjustment rotor 32A contacts the outer circumferential surface of the band saw unit 22. The second adjustment rotor 32A can be moved in the Y direction, for example, under the control of the control device 50. This allows adjustment of a predetermined distance D between the first cutting portion 24 and the second cutting portion 26 of the band saw unit 22.

[0054] As shown in FIG. 8 , the drive unit 20 of the cutting device 10D has a connecting member 70. The connecting member 70 is plate-shaped and connects the first rotating body 28 and the second rotating body 32. Both ends of the connecting member 70 are connected to support members 72 and 74. The support member 72 is disposed on one side of the drive unit 20 in the X direction (connection portion 30 in this example), and the support member 74 is disposed on the other side of the drive unit 20 in the X direction (connection portion 34 in this example). That is, the position of the connecting member 70 in the Z direction is fixed relative to the first rotating body 28 via the support member 72, and the position of the connecting member 70 in the Z direction is fixed relative to the second rotating body 32 via the support member 74. By providing such a connecting member 70, excessive positional deviation between the first rotating body 28 and the second rotating body 32 in the Z direction can be prevented, allowing the target object W to be cut appropriately.

[0055] The shape and location of the connecting member 70 may be arbitrary. In this embodiment, however, the connecting member 70 is located on the Z2 direction side of the band saw unit 22 (the first cutting unit 24 and the second cutting unit 26). The Z2 direction here refers to the direction along the Z direction, opposite the direction from the band saw unit 22 toward the object W. In other words, if the direction along the Z direction, from the band saw unit 22 toward the object W, is defined as the Z1 direction, the Z2 direction refers to the direction opposite the Z1 direction. Furthermore, the connecting member 70 is located so as to overlap the region between the first cutting unit 24 and the second cutting unit 26 when viewed from the Z direction. Furthermore, the thickness of the connecting member 70 in the direction from the first cutting unit 24 toward the second cutting unit 26 (here, the Y direction) is less than the distance D. This allows the connecting member 70 to pass through the region between the first cutting unit 24 and the second cutting unit 26 when cutting the object W, thereby preventing the connecting member 70 from interfering with the cutting. The material of the connection member 70 is preferably high-toughness carbon fiber, but may be any material.

[0056] 10 and 11 are schematic top views of a case where a plurality of cutting devices of the second modified example are used.

[0057] As shown in FIGS. 10 and 11, the cutting system may include multiple cutting devices 10D. Each cutting device 10D cuts the object W by arranging the first rotating body 28 and the second rotating body 32 of the cutting device 10D so that they face each other with the object W in between. This arrangement reduces the cutting reaction force during cutting. Furthermore, by using multiple cutting devices 10D and driving them simultaneously, multiple locations can be cut simultaneously. This allows for efficient cutting.

[0058] 11, two cutting devices 10D can be arranged so that the band saw units 22 of the cutting device 10C intersect. In this arrangement, the respective cutting devices 10D are arranged side by side in the Z direction. One of the band saw units 22 is driven first to cut the object W, and the other band saw unit 22 is driven to cut the object W following the band saw unit 22 that cut first. This allows for finer cutting than when using only one device. Note that there may be three or more intersecting cutting devices 10D.

[0059] In the cutting device 10D, the drive unit 40 may be provided on one side of the first rotating body 28 or the second rotating body 32. In this way, the cutting device 10D can be simplified.

[0060] [effect] A cutting system 1 according to a first aspect of the present disclosure includes a band saw unit 22 having a band-shaped saw blade, the band saw unit 22 including a first cutting unit 24 where the saw blade is driven to move in a first direction of travel A and a second cutting unit 26 where the saw blade is driven to move in a second direction of travel B opposite the first direction of travel A; a first rotor 28 located on one side of the first cutting unit 24 and the second cutting unit 26 and on which the band saw unit 22 is hung; a second rotor 32 located on the other side of the first cutting unit 24 and the second cutting unit 26 and on which the band saw unit 22 is hung; and a drive unit 40 that moves the band saw unit 22, the first rotor 28, and the second rotor 32 relative to the object W to be cut in a movement direction along the width direction of the saw blade of the band saw unit 22. This disclosure reduces reaction force, enabling efficient cutting of large objects W. Furthermore, the cutting device 10 is easy to transport.

[0061] A cutting system 1 according to a second aspect of the present disclosure is the cutting device 10 according to the first aspect, in which the drive unit 40 has a first drive unit A1 that moves the relative position of the first rotating body 28 with respect to the target object W, and a second drive unit A2 that moves the relative position of the second rotating body 32 with respect to the target object W. According to the present disclosure, a large target object W can be cut efficiently.

[0062] A cutting system 1 according to a third aspect of the present disclosure is the cutting device 10 according to the second aspect, in which the first drive unit A1 controls the movement of the first rotor 28 according to the position of the second rotor 32 in the movement direction. According to the present disclosure, when the band saw unit 22 tilts during cutting, the band saw unit 22 can be leveled.

[0063] A cutting system 1 according to a fourth aspect of the present disclosure is the cutting device 10 according to any one of the first to third aspects, and further includes a connecting member 70 that connects the first rotating body 28 and the second rotating body 32. According to the present disclosure, a large target object W can be cut efficiently.

[0064] A cutting system 1 according to a fifth aspect of the present disclosure is the cutting device 10 according to the fourth aspect, in which the first cutting unit 24 and the second cutting unit 26 are arranged to move in opposite directions with a predetermined distance D between them, and the connecting member 70 is located on the opposite side of the movement direction from the first cutting unit 24 and the second cutting unit 26, and has a thickness less than the predetermined distance D. According to the present disclosure, a large target object W can be cut efficiently.

[0065] A cutting system 1 according to a sixth aspect of the present disclosure is the cutting device 10 according to any one of the first to fifth aspects, in which the band saw unit 22 has a first band saw blade 22A including a first cutting portion 24 and a second band saw blade 22B including a second cutting portion 26. According to the present disclosure, it is possible to reduce the reaction force.

[0066] A cutting method according to a seventh aspect of the present disclosure uses a cutting device 10 including: a band saw unit 22 having a band-shaped saw blade, the band saw unit 22 including a first cutting section 24 where the saw blade is driven to move in a first direction and a second cutting section 26 where the saw blade is driven to move in a second direction opposite the first direction; a first rotor 28 located on one side of the first cutting section 24 and the second cutting section 26 and on which the band saw unit 22 is hung; and a second rotor 32 located on the other side of the first cutting section 24 and the second cutting section 26 and on which the band saw unit 22 is hung, the cutting method including the step of moving the band saw unit 22, the first rotor 28, and the second rotor 32 relative to the object W to be cut in a movement direction along the width direction of the saw blade of the band saw unit 22. According to the present disclosure, it is possible to reduce reaction force and efficiently cut a large object W. [Explanation of symbols]

[0067] 1 Cutting System 10 Cutting device 22 Band saw section 22A No. 1 Bandsaw Blade 22B 2nd band saw blade 24 1st cutting section 26 2nd cutting section 28 First Rotating Body 32 Second Rotating Body 40 Drive unit 70 Connecting member A 1st direction of travel A1 First drive unit A2 Second drive unit B Second direction of travel W Object

Claims

1. a band saw unit having a band-shaped saw blade, the band saw unit including a first cutting portion where the saw blade is driven to move in a first direction of travel, and a second cutting portion where the saw blade is driven to move in a second direction of travel opposite to the first direction of travel; a first rotor provided on one side of the first cutting section and the second cutting section, on which the band saw section is hung; a second rotor provided on the other side of the first cutting section and the second cutting section, on which the band saw section is hung; a connecting member that connects the first rotating body and the second rotating body; a drive unit that moves the relative positions of the band saw unit, the first rotor, and the second rotor with respect to the object to be cut in a movement direction along the width direction of the saw blade of the band saw unit; and the first cutting unit and the second cutting unit are disposed to move in opposite directions from each other at a predetermined distance, the connecting member is located on the opposite side of the first cutting portion and the second cutting portion in the movement direction, and has a thickness less than the predetermined distance. Cutting system.

2. the driving unit includes a first driving unit that moves the relative position of the first rotating body with respect to the object, and a second driving unit that moves the relative position of the second rotating body with respect to the object; having The cutting system of claim 1 .

3. The cutting system according to claim 2 , wherein the first drive unit controls the movement of the first rotating body depending on a position of the second rotating body in the movement direction.

4. The band saw unit has a first band saw blade including the first cutting portion and a second band saw blade including the second cutting portion.

3. A cutting system according to claim 1 or claim 2.

5. A band saw unit having a band-shaped saw blade, the band saw unit including a first cutting portion where the saw blade is driven to move in a first direction of travel, and a second cutting portion where the saw blade is driven to move in a second direction of travel opposite to the first direction of travel; a first rotor provided on one side of the first cutting section and the second cutting section, on which the band saw section is hung; a second rotor provided on the other side of the first cutting section and the second cutting section, on which the band saw section is hung; a drive unit that moves the relative positions of the band saw unit, the first rotor, and the second rotor with respect to the object to be cut in a movement direction along the width direction of the saw blade of the band saw unit; and The band saw unit has a first band saw blade including the first cutting portion and a second band saw blade including the second cutting portion. Cutting system.

6. A band saw unit having a band-shaped saw blade, the band saw unit including a first cutting portion where the saw blade is driven to move in a first direction of travel, and a second cutting portion where the saw blade is driven to move in a second direction of travel opposite to the first direction of travel; a first rotor provided on one side of the first cutting section and the second cutting section, on which the band saw section is hung; a second rotor provided on the other side of the first cutting section and the second cutting section, on which the band saw section is hung; a connecting member that connects the first rotating body and the second rotating body; Including, the first cutting unit and the second cutting unit are disposed to move in opposite directions from each other at a predetermined distance, a connecting member positioned on an opposite side of the first cutting unit and the second cutting unit in a movement direction along a width direction of the saw blade of the band saw unit, and having a thickness less than the predetermined distance; a step of moving the relative positions of the band saw unit, the first rotating body, and the second rotating body with respect to the object to be cut in the movement direction. Cutting method.

7. a band saw unit having a band-shaped saw blade, the band saw unit including a first cutting portion where the saw blade is driven to move in a first direction of travel, and a second cutting portion where the saw blade is driven to move in a second direction of travel opposite to the first direction of travel; a first rotor provided on one side of the first cutting section and the second cutting section, on which the band saw section is hung; a second rotating body provided on the other side of the first cutting section and the second cutting section, and on which the band saw section is hung, The band saw unit has a first band saw blade including the first cutting portion and a second band saw blade including the second cutting portion.

1. A cutting method using a cutting system, comprising: a step of moving the relative positions of the band saw unit, the first rotating body, and the second rotating body with respect to the object to be cut in a movement direction along the width direction of the saw blade of the band saw unit, Cutting method.

Images