Cutting machine

Abstract

To easily recognize whether a material to be cut is properly mounted in a holding device.SOLUTION: A holding device 30 of a cutting machine 100 includes a first arm 101 and a second arm. An adapter 6 for holding a material 5 to be cut has a first protrusion section 301 provided at a first end 6a. The first arm 101 has a first sandwiching section 124 which is movable in a sandwiching direction D2 and a first elastic member 118 which applies pressing force to the second arm 102 side with respect to the first sandwiching section 114. The first sandwiching section 114 is arranged at a position where the first protrusion section 301 passes when the material 5 to be cut moves toward a holding position P11 along an attaching / detaching direction D1 with respect to the holding device 30 when the adapter 6 is not held by the holding device 30. When the material 5 to be cut passes a middle position P13 to be a middle position when the material 5 to be cut moves toward the holding position P11 along the attaching / detaching direction D1, the first protrusion section 301 comes into contact with the first sandwiching section 114.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a machining tool.

Background Art

[0002] For example, Patent Document 1 discloses a machining tool that rotates a bar-shaped cutting tool around an axis to machine a workpiece. The machining tool includes a spindle having a gripping portion that grips a cutting tool for machining the workpiece, and a holding portion that holds the workpiece.

[0003] The machining tool includes a case body having an internal space in which the holding portion and the spindle are accommodated. An opening is formed in the front portion of the case body. The case body is provided with a front cover that can open and close the opening. Here, the workpiece held by the holding portion is manually exchanged by the user through the opening of the case body.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, when attaching the workpiece to the holding portion, it may be difficult to know whether the workpiece is properly attached to the holding portion, that is, whether the holding portion holds the workpiece at an appropriate position.

[0006] The present invention has been made in view of this point, and an object thereof is to provide a machining tool in which it is easy to know that the workpiece is properly attached to the holding device when the workpiece is attached to the holding device.

Means for Solving the Problems

[0007] The cutting machine according to the present invention includes a holding device that holds an adapter for holding a workpiece when machining the workpiece. The holding device is configured to move the workpiece from one of the attachment / detachment directions to the other with respect to the holding device, and to be able to hold the workpiece when the workpiece is disposed at the holding position. The holding device includes a first arm and a second arm. The first arm extends in the attachment / detachment direction. The second arm is arranged side by side with the first arm in a clamping direction intersecting the attachment / detachment direction, extends in the attachment / detachment direction, and clamps the workpiece together with the first arm. The adapter is provided at a first end portion on one side in the clamping direction and has a first convex portion protruding toward one side in the clamping direction. The first arm has a first clamping portion movable in the clamping direction and a first elastic member that applies a pressing force to the first clamping portion toward the second arm side. In a state where the adapter is not held by the holding device, the first clamping portion is arranged at a position where the first convex portion of the adapter passes when the workpiece moves toward the holding position along the attachment / detachment direction with respect to the holding device. When the workpiece passes through an intermediate position located on one side in the attachment / detachment direction with respect to the holding position while moving toward the holding position along the attachment / detachment direction with respect to the holding device, the first convex portion of the adapter is configured to contact the first clamping portion.

[0008] According to the cutting machine, when attaching and holding a workpiece to the holding device, the workpiece is moved in the attaching / detaching direction toward the holding position. Here, when the workpiece passes through an intermediate position, a force is applied to the workpiece toward the holding position, causing the first convex portion of the adapter to be pressed against the first clamping portion, and the first clamping portion moves to the side opposite to the second clamping portion. As a result, when the workpiece passes through the intermediate position and is positioned at the holding position, the holding device can hold the workpiece. Thus, according to the cutting machine, when the workpiece passes through the intermediate position, by applying a force to the workpiece, the workpiece can be appropriately arranged at the holding position. Therefore, it can be easily understood that the workpiece is appropriately attached to the holding device.

Advantages of the Invention

[0009] According to the present invention, when attaching a workpiece to a holding device, it is possible to provide a cutting machine in which it can be easily understood that the workpiece is appropriately attached to the holding device.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments of a machining machine according to the present invention will be described with reference to the drawings. It should be noted that the embodiments described here are not intended to particularly limit the present invention. Also, members and parts having the same function are denoted by the same reference numerals, and redundant descriptions are omitted or simplified as appropriate.

[0012] FIG. 1 is a perspective view showing a machining machine 100 according to the present embodiment. FIG. 2 is a longitudinal sectional view of the machining machine 100 seen from the left side. FIG. 3 is a longitudinal sectional view of the machining machine 100 seen from the right side. FIG. 4 is a perspective view showing the machining machine 100 when the slide cover 60 is open. Here, the reference signs F, Rr, L, R, U, and D in the drawings respectively mean the front, rear, left, right, top, and bottom of the machining machine 100. Note that these directions are merely directions defined for convenience of explanation and do not limit the installation mode of the machining machine 100 in any way, nor do they limit the present invention in any way.

[0013] In this embodiment, the cutting machine 100 produces an object by cutting a workpiece 5 (see FIG. 5). Here, the type of the object is not particularly limited, but it is a dental molded product, such as a dental crown prosthesis, an artificial tooth, a denture base, etc. Examples of dental crown prostheses include a crown, a bridge, a coping, an inlay, an onlay, a veneer, a custom abutment, etc. In this embodiment, the cutting machine 100 is used in the dental field and produces a dental molded product from the workpiece 5. However, the field where the cutting machine 100 is used is not limited to the dental field.

[0014] As shown in FIG. 1, the cutting machine 100 includes a case body 10. The case body 10 is formed in a box shape and has a space inside. The space inside the case body 10 is partitioned into a plurality of areas.

[0015] Here, as shown in FIG. 2, inside the case body 10, as a plurality of areas, there are provided a cutting area A1 in which a workpiece holder 30 for holding the workpiece 5 (see FIG. 5) is accommodated, and an accommodation area A2 in which a cutting device 20 is accommodated. The cutting area A1 is an area for cutting the workpiece 5. The cutting area A1 is an example of the area of the present invention. A first opening 12a (see FIG. 4) is formed in front of the cutting area A1. The cutting area A1 communicates with the outside of the cutting machine 100 through the first opening 12a. The accommodation area A2 is located above the cutting area A1.

[0016] Also, as shown in FIG. 3, inside the case body 10, there are provided a drive device area A3 in which a holder moving device 40 for moving the workpiece holder 30 and a tool stocker 45 (see FIG. 2) are accommodated, and a tool exchange area A4 arranged in front of the accommodation area A2. The drive device area A3 is located to the right of the cutting area A1. A second opening 12b (see FIG. 4) is formed in front of the tool exchange area A4. The tool exchange area A4 communicates with the outside of the cutting machine 100 through the second opening 12b.

[0017] As shown in FIG. 4, a slide cover 60 is provided on the front surface of the case body 10 so as to be openable and closable. The case body 10 is provided with a slide rail 61 with which the slide cover 60 engages and which extends from the front and downward directions toward the rear and upward directions.

[0018] In the present embodiment, an operation panel 90 is provided below the slide cover 60. The operation panel 90 is for the user to perform operations related to cutting. For example, the operation panel 90 has input buttons 91 that the user operates.

[0019] As shown in FIG. 2, the case body 10 has a bottom wall 11, a front wall 12, a left side wall 13 (see FIG. 1), a right side wall 14 (see FIG. 4), a top wall 15, and a rear wall 16. Each member constituting the case body 10 is formed of a steel plate or the like. The bottom wall 11 extends in the front-rear direction and the left-right direction and constitutes the bottom surface of the cutting machine 100. The left side wall 13 is connected to the left end of the bottom wall 11. The left side wall 13 extends upward from the left end of the bottom wall 11. The right side wall 14 is connected to the right end of the bottom wall 11. The right side wall 14 extends upward from the right end of the bottom wall 11. The rear wall 16 is connected to the rear end of the bottom wall 11. The rear wall 16 extends upward from the rear end of the bottom wall 11. The left end of the rear wall 16 is connected to the rear end of the left side wall 13. The right end of the rear wall 16 is connected to the rear end of the right side wall 14. The top wall 15 is provided above the bottom wall 11 in parallel with the bottom wall 11. The top wall 15 is connected to the upper ends of the left side wall 13, the right side wall 14, and the rear wall 16. The front wall 12 is connected to the front end of the bottom wall 11. In the present embodiment, the front wall 12 extends upward while inclining rearward from the front end of the bottom wall 11.

[0020] Hereinafter, the direction in which the front wall 12 extends is also referred to as the Z-axis direction. Also, hereinafter, when not otherwise specified, the upper side in the Z-axis direction is simply referred to as the upper side, and the lower side in the Z-axis direction is simply referred to as the lower side. The left end of the front wall 12 is connected to the front end of the left side wall 13, and the right end of the front wall 12 is connected to the front end of the right side wall 14. Also, the upper end of the front wall 12 is connected to the front end of the top wall 15. As shown in FIG. 4, the front wall 12 is formed with a first opening 12a communicating with the cutting area A1 and a second opening 12b communicating with the tool exchange area A4.

[0021] FIG. 5 is a plan view of the work holder 30. As shown in FIG. 5, the cutting machine 100 includes a work holder 30, a holder moving device 40, a holder rotating device 50, a cutting device 20 (see FIG. 2), and a tool stocker 45 (see FIG. 2). The work holder 30 is a device for holding the workpiece 5. The work holder 30 is an example of a holding device. Details of the work holder 30 will be described later.

[0022] The holder moving device 40 supports and moves the work holder 30. In the present embodiment, the holder moving device 40 moves the work holder 30 in the front-rear direction. More specifically, as shown in FIG. 2, the holder moving device 40 moves the work holder 30 in the diagonally front-rear direction. When the work holder 30 is moved forward by the holder moving device 40, it also moves upward. When the work holder 30 is moved backward by the holder moving device 40, it also moves downward. Hereinafter, the direction in which the work holder 30 is moved by the holder moving device 40 is also referred to as the X-axis direction. The holder moving device 40 moves the work holder 30 in the X-axis direction. Hereinafter, when not otherwise specified, the front in the X-axis direction is simply referred to as the front, and the rear in the X-axis direction is simply referred to as the rear. As shown in FIG. 5, the holder moving device 40 is connected to the holder rotating device 50.

[0023] The holder moving device 40 includes a support arm 41 that extends in the left-right direction and supports the work holder 30. As shown in FIG. 3, the holder moving device 40 includes an X-axis direction moving body 42 connected to the support arm 41, a pair of X-axis guide rails 43, and an X-axis direction drive motor 44. The holder moving device 40 moves the work holder 30 in the X-axis direction by moving the support arm 41 in the X-axis direction. Here, a part of the X-axis direction moving body 42, the pair of X-axis guide rails 43, the X-axis direction drive motor 44, and the support arm 41 of the holder moving device 40 are accommodated in the drive device area A3.

[0024] The pair of X-axis guide rails 43 extends in the X-axis direction. The X-axis direction moving body 42 is slidably engaged with the pair of X-axis guide rails 43. The X-axis direction moving body 42 is configured to be movable in the X-axis direction along the X-axis guide rails 43. Although illustration is omitted, for example, the X-axis direction moving body 42 is connected to a ball screw. That is, the holder moving device 40 has a ball screw mechanism. The X-axis direction drive motor 44 rotates the ball screw. When the X-axis direction drive motor 44 is driven, the X-axis direction moving body 42 moves in the X-axis direction along the X-axis guide rails 43. Note that the holder moving device 40 is not limited to having a ball screw mechanism, and for example, it may have a timing belt or a wire.

[0025] As shown in FIG. 5, the support arm 41 includes a rotation shaft 41a that rotates around an axis Axb extending in the left-right direction, a first rotation arm 41b that is connected to the rotation shaft 41a so as to be orthogonal to the axis Axb and rotates in the front-rear direction together with the rotation shaft 41a, and a second rotation arm 41c that is connected to the first rotation arm 41b parallel to the axis Axb (in other words, orthogonal to the first rotation arm 41b). As shown in FIG. 3, a B-axis rotation motor 51B of a B-axis rotation device 50B described later is connected to the X-axis direction moving body 42. The rotation shaft 41a (see FIG. 5) rotates around the axis Axb (see FIG. 5) by the B-axis rotation motor 51B.

[0026] The holder rotation device 50 rotates the work holder 30. As shown in FIG. 5, the holder rotation device 50 includes an A-axis rotation device 50A that rotates the work holder 30 in the left-right direction, and a B-axis rotation device 50B (see FIG. 3) that rotates the work holder 30 in the front-rear direction. The A-axis rotation device 50A has an A-axis rotation motor 51A and a rotation shaft 52A. The A-axis rotation motor 51A is fixed to the second rotation arm 41c. The rotation shaft 52A is connected to the A-axis rotation motor 51A (specifically, the drive unit including the A-axis rotation motor 51A) and extends in the X-axis direction along the axis AXa. Here, the rear end of the rotation shaft 52A is connected to the A-axis rotation motor 51A. The front end of the rotation shaft 52A is connected to the work holder 30 (specifically, the central portion of the connecting portion 103 of the work holder 30 described later). In the present embodiment, when the A-axis rotation motor 51A is driven, the rotation shaft 52A rotates around the axis Axa. As the rotation shaft 52A rotates, the work holder 30 rotates around the axis Axa, so that it can rotate in the left-right direction.

[0027] The B-axis rotation device 50B has a B-axis rotation motor 51B (see FIG. 3) and the above-described rotation shaft 41a (see FIG. 5). As shown in FIG. 3, the B-axis rotation motor 51B is connected to the X-axis direction moving body 42 as described above. As shown in FIG. 5, the rotation shaft 41a extends in the left-right direction. The right end of the rotation shaft 41a is connected to the B-axis rotation motor 51B. The left end of the rotation shaft 41a is connected to the work holder 30 via the first rotation arm 41b, the second rotation arm 41c, and the rotation shaft 52A. Here, when the B-axis rotation motor 51B is driven, the rotation shaft 41a rotates around the axis Ax b. As the rotation shaft 41a rotates, the work holder 30 rotates around the axis Ax b together with the first rotation arm 41b and the second rotation arm 41c, etc., so that it can rotate in the front-rear direction.

[0028] The cutting device 20 shown in Fig. 2 is a device for machining a workpiece 5. The cutting device 20 machines the workpiece 5 by bringing the machining tool 8 into contact with the workpiece 5 while rotating the machining tool 8. The cutting device 20 includes a spindle 21, a tool gripping portion 22 that grips the machining tool 8, a spindle rotation device 23 that rotates the spindle 21, and a cutting movement device 24 that can move the spindle 21 in the left-right direction (here, the Y-axis direction) and the Z-axis direction. When the workpiece 5 is not being machined, the cutting device 20 is arranged in the accommodation area A2.

[0029] The spindle 21 rotates the tool gripping portion 22 and the machining tool 8 gripped by the tool gripping portion 22 about the longitudinal axis. The spindle 21 extends, for example, in the Z-axis direction. A spindle rotation device 23 is connected to the spindle 21. When the spindle rotation device 23 is driven, the spindle 21 rotates about the central axis extending in the Z-axis direction. The configuration of the spindle rotation device 23 is not particularly limited and may be, for example, an electric motor.

[0030] The tool gripping portion 22 grips the machining tool 8 and is provided on the spindle 21. The machining device 100 is preliminarily provided with a plurality of machining tools 8 having different diameters and tool tip shapes. The plurality of machining tools 8 are accommodated in the tool stocker 45. The tool gripping portion 22 selectively grips one of the plurality of machining tools 8. As the spindle 21 rotates about the central axis extending in the Z-axis direction, the tool gripping portion 22 and the machining tool 8 gripped by the tool gripping portion 22 rotate about the central axis of the machining tool 8.

[0031] As shown in FIG. 2, the cutting device 20 is provided with an air blow device 28. The air blow device 28 is provided on the side of the spindle 21. The air blow device 28 injects air downward in the Z-axis direction from the lower end. The supply source of the air injected by the air blow device 28 is not particularly limited. For example, the supply source may be a compressor installed outside the cutting machine 100. By the air blow device 28 injecting air during the cutting process of the workpiece 5, the cutting powder generated when cutting the workpiece 5 can be blown away. Also, although cutting heat is generated during the cutting process, since the air blow device 28 injects air toward the workpiece 5 and the machining tool 8, the workpiece 5 and the machining tool 8 can be cooled.

[0032] The cutting movement device 24 is a device that moves the spindle 21, the tool gripping part 22, the spindle rotation device 23, and the air blow device 28 in the Z-axis direction and the left-right direction. Here, the left-right direction is a direction orthogonal to the X-axis direction and the Z-axis direction. Hereinafter, the left-right direction is also referred to as the Y-axis direction. The cutting movement device 24 is provided above the workpiece holder 30. By the cutting movement device 24 moving the spindle 21, the tool gripping part 22, the spindle rotation device 23, and the air blow device 28 in the Y-axis direction and the Z-axis direction, and the holder movement device 40 moving the workpiece holder 30 in the X-axis direction, the positional relationship between the machining tool 8 and the workpiece 5 changes three-dimensionally. The spindle 21, the tool gripping part 22, the spindle rotation device 23, and the air blow device 28 appear in the cutting area A1 or retract to the accommodation area A2 by moving in the Z-axis direction. Here, the cutting area A1 and the accommodation area A2 communicate with each other through the opening A1U. The opening A1U has a size that allows the spindle 21, the tool gripping part 22, the spindle rotation device 23, and the air blow device 28 to pass through. When performing cutting on the workpiece 5, the cutting movement device 24 moves the spindle 21, the tool gripping part 22, the spindle rotation device 23, and the air blow device 28 to the cutting area A1.

[0033] As shown in FIG. 2, the cutting movement device 24 includes a left - right movement device 24Y and an up - down movement device 24Z. When the left - right movement device 24Y is driven, the spindle 21, the tool gripping part 22, the spindle rotation device 23, and the air blow device 28 move in the Y - axis direction. When the up - down movement device 24Z is driven, the spindle 21, the tool gripping part 22, the spindle rotation device 23, and the air blow device 28 move in the Z - axis direction. Note that the configuration of the cutting movement device 24 is not particularly limited. For example, the left - right movement device 24Y may be composed of a guide rail extending in the Y - axis direction, a left - right moving body slidably engaged with the guide rail, a ball screw connected to the left - right moving body, an electric motor for rotating the ball screw, and the like. Also, the up - down movement device 24Z may be, for example, a mechanism having a ball screw similar to the left - right movement device 24Y.

[0034] As shown in FIG. 2, an exhaust duct 80 is provided at the rear and lower part of the case body 10. The exhaust duct 80 extends from the cutting area A1 inside the case body 10 to the outside of the case body 10. A dust collector 85 is installed outside the case body 10. The dust collector 85 is connected to the end of the exhaust duct 80 on the outside of the case body 10. The configuration of the dust collector 85 is not particularly limited, but for example, it has a fan. When the fan rotates, the dust collector 85 can suck the cutting powder together with the air inside the cutting area A1 through the exhaust duct 80.

[0035] The tool stocker 45 is housed in the drive unit area A3 (see FIG. 3). As shown in FIG. 2, the tool stocker 45 is a box-shaped member capable of storing a plurality of processing tools 8 formed in a rod shape. The plurality of processing tools 8 are used selectively according to, for example, the material of the workpiece 5 to be cut and the type of cutting. The tool stocker 45 is supported by the X-axis direction moving body 42 (see FIG. 3). Specifically, the tool stocker 45 is fixed to the upper surface of the X-axis direction moving body 42. Therefore, the holder moving device 40 is configured to be able to move the tool stocker 45 to the tool gripping position P1 located below the opening A1U and the tool exchange position P2 set in front of the tool gripping position P1. The tool exchange position P2 is set below the tool exchange area A4 (see FIG. 3). As shown in FIG. 3, an opening A4d is formed in the bottom wall A4D of the tool exchange area A4, which is located above the tool exchange position P2 (see FIG. 2) and opens in the Z-axis direction. The opening A4d is for the user to insert and remove the processing tool 8 into and from the tool stocker 45. When the holder moving device 40 is driven to move the tool stocker 45 to the tool exchange position P2, the user can access the tool stocker 45 from the tool exchange area A4 through the opening A4d.

[0036] Next, a workpiece holder 30, which is an example of the holding device, will be described in detail. As shown in FIG. 5, the workpiece holder 30 holds the workpiece 5 when machining the workpiece 5. In the present embodiment, the workpiece 5 is held by the adapter 6. Therefore, the workpiece holder 30 indirectly holds the workpiece 5 by holding the adapter 6 that holds the workpiece 5. In the following description, when simply referring to the workpiece 5, it means the state in which the adapter 6 is attached to the workpiece 5, that is, the state in which the workpiece 5 is held by the adapter 6.

[0037] In this embodiment, the replacement of the workpiece 5 held by the workpiece holder 30 is manually performed by the user. The workpiece holder 30 is configured to detachably hold the workpiece 5. FIG. 6 is a schematic diagram showing a state where the workpiece holder 30 is disposed at the cutting position P3 and the replacement position P4. In FIG. 6, the area on the left side of the dashed line is the cutting area A1, and the area on the right side of the dashed line is the area in front of the case body 10. Also, in FIG. 6, the illustration of the adapter 6 is omitted. Here, the holder moving device 40 in FIG. 3 is configured to be able to move the workpiece holder 30 to the cutting position P3 and the replacement position P4 as indicated by the arrow A10 in FIG. 6. The cutting position P3 is the position of the workpiece holder 30 when the workpiece 5 held by the workpiece holder 30 is machined by the cutting device 20 (see FIG. 2). The cutting position P3 is a position below the opening A1U (see FIG. 2) in the cutting area A1. The replacement position P4 is the position of the workpiece holder 30 when the user manually replaces the workpiece 5 held by the workpiece holder 30. The replacement position P4 is within the cutting area A1 and is located on the front side in the X-axis direction with respect to the cutting position P3.

[0038] As shown in FIG. 6, the direction in which the workpiece 5 is moved with respect to the workpiece holder 30 when the user attaches or detaches the workpiece 5 to or from the workpiece holder 30 is referred to as the attachment / detachment direction D1. In this embodiment, the attachment / detachment direction D1 is the direction from the front end to the rear end of the workpiece holder 30 and is also the direction from the rear end to the front end of the workpiece holder 30. For example, in a state where the workpiece 5 is disposed in front of the workpiece holder 30, when the user moves the workpiece 5 from one side (here, the front) to the other side (here, the rear) of the attachment / detachment direction D1, the workpiece 5 is attached to the workpiece holder 30, and the workpiece holder 30 can hold the workpiece 5. On the other hand, in a state where the workpiece 5 is held by the workpiece holder 30, when the user moves the workpiece 5 from the other side to one side of the attachment / detachment direction D1, the workpiece 5 can be removed from the workpiece holder 30. The attachment / detachment direction D1 is, for example, a direction extending in the X-axis direction.

[0039] In this embodiment, as shown in FIG. 5, the direction intersecting (here, orthogonal) the attachment / detachment direction D1 is referred to as the clamping direction D2. When viewed from the Z-axis direction, the clamping direction D2 and the attachment / detachment direction D1 are orthogonal. The clamping direction D2 is, for example, a direction extending in the Y-axis direction. The clamping direction D2 is the direction in which the first arm 101 and the second arm 102 (described later) of the workpiece holder 30 clamp the workpiece 5. Here, by clamping the workpiece 5 with the first arm 101 and the second arm 102, the workpiece holder 30 can hold the workpiece 5 (specifically, the adapter 6 that holds the workpiece 5).

[0040] FIG. 7 is a plan view showing the workpiece 5 and the workpiece holder 30 when the workpiece 5 is located at the non-holding position P12. In this embodiment, as shown in FIG. 5, the position of the workpiece 5 with respect to the workpiece holder 30 when the workpiece holder 30 holds the workpiece 5 is referred to as the holding position P11. On the other hand, as shown in FIG. 7, the position of the workpiece 5 with respect to the workpiece holder 30 when the workpiece holder 30 does not hold the workpiece 5 is referred to as the non-holding position P12. The non-holding position P12 is a position in front of the holding position P11. Here, the non-holding position P12 means that the workpiece 5 has been removed from the workpiece holder 30 and is in a position in front of the workpiece holder 30.

[0041] FIG. 8 is a plan view showing a workpiece 5 held by an adapter 6. FIG. 9 is a cross-sectional view of the workpiece 5 and the adapter 6 taken along the line IX-IX in FIG. 8. As shown in FIG. 8, the workpiece 5 held by the workpiece holder 30 is, for example, plate-shaped and extends in the attachment / detachment direction D1 and the clamping direction D2. Here, the workpiece 5 has a disk shape. When viewed from the Z-axis direction, the workpiece 5 has a circular shape. As shown in FIG. 9, the workpiece 5 has a disk-shaped workpiece main body 5a and an annular convex portion 5b. The workpiece main body 5a is the portion to be machined. By machining the workpiece main body 5a, an object is produced. The annular convex portion 5b is the portion held by the adapter 6. The annular convex portion 5b is provided on the peripheral surface of the workpiece main body 5a and protrudes outward from the workpiece main body 5a. Here, the annular convex portion 5b is thinner than the workpiece main body 5a and is provided at the central portion of the workpiece main body 5a in the Z-axis direction. However, the configuration and shape of the workpiece 5 are not particularly limited.

[0042] Also, the material of the workpiece 5 is not particularly limited. In the present embodiment, the workpiece 5 is formed of materials such as zirconia, polymethyl methacrylate resin (PMMA), hybrid resin, PEEK (polyetheretherketone resin), and gypsum, depending on the type of material. When zirconia is used as the type of material of the workpiece 5, for example, semi-sintered zirconia is used.

[0043] In the present embodiment, as shown in FIG. 8, the adapter 6 that holds the workpiece 5 is, for example, plate-shaped and extends in the attachment / detachment direction D1 and the clamping direction D2. Here, the end portion on one side (here, the left side) in the clamping direction D2 of the adapter 6 is referred to as a first end portion 6a. The end portion on the other side (here, the right side) in the clamping direction D2 of the adapter 6 is referred to as a second end portion 6b. The first end portion 6a and the second end portion 6b face each other.

[0044] The adapter 6 includes an adapter body 200 extending in the attachment / detachment direction D1 and the clamping direction D2. The first end 6a constitutes the left end of the adapter body 200. The second end 6b constitutes the right end of the adapter body 200. Here, the first end 6a and the second end 6b typically extend in the X-axis direction, that is, the attachment / detachment direction D1.

[0045] A fitting hole 201 is formed in the adapter body 200. The fitting hole 201 is a hole that penetrates the adapter body 200 vertically and is formed in the central portion of the adapter body 200. The workpiece 5 is fitted into the fitting hole 201. By fitting the workpiece 5 into the fitting hole 201, the adapter 6 can hold the workpiece 5. The fitting hole 201 has a shape corresponding to the workpiece 5. Here, the fitting hole 201 is circular.

[0046] In the present embodiment, as shown in FIG. 9, the adapter body 200 has a frame 210, a first plate 211, and a second plate 212. Here, the frame 210 is sandwiched between the first plate 211 and the second plate 212. The first plate 211 is disposed above the frame 210. The second plate 212 is disposed below the frame 210. They are arranged so as to overlap in the order of the first plate 211, the frame 210, and the second plate 212 from above. The fitting hole 201 is formed in the adapter body 200 so as to penetrate the frame 210, the first plate 211, and the second plate 212 vertically.

[0047] In this embodiment, the annular convex portion 5b of the workpiece 5 is sandwiched between the first plate 211 and the second plate 212, so that the adapter 6 can hold the workpiece 5. At this time, the frame 210 is disposed outside the annular convex portion 5b of the workpiece 5. Here, the workpiece 5 is fitted into the fitting hole 201 of the adapter 6, and the first plate 211 and the second plate 212 are fastened by the screw 220 in a state where the annular convex portion 5b of the workpiece 5 is sandwiched between the first plate 211 and the second plate 212. By this, the workpiece 5 is fixed to the adapter 6. Note that the position and number of the screws 220 are not particularly limited. As shown in FIG. 8, for example, the number of the screws 220 is four, and they are disposed at the left front, left rear, right front, and right rear of the adapter body 200.

[0048] The adapter 6 has a first convex portion 301, a second convex portion 302, a first fixed concave portion 311, a second fixed concave portion 312, a first non-fixed concave portion 321, and a second non-fixed concave portion 322. The first convex portion 301, the first fixed concave portion 311, and the first non-fixed concave portion 321 are provided at the first end portion 6a of the adapter 6. In this embodiment, the adapter 6 has a front side portion 6c and a rear side portion 6d when the adapter 6 is divided into two parts (here, equally divided) in the attachment / detachment direction D1. The first convex portion 301, the first fixed concave portion 311, and the first non-fixed concave portion 321 are provided at the rear side portion 6d of the adapter 6. In this embodiment, the first non-fixed concave portion 321, the first convex portion 301, and the first fixed concave portion 311 are arranged side by side in the attachment / detachment direction D1. Here, the first fixed concave portion 311 is located on one side (here, the front side) of the attachment / detachment direction D1 with respect to the first convex portion 301. The first non-fixed concave portion 321 is located on the other side (here, the rear side) of the attachment / detachment direction D1 with respect to the first convex portion 301. The first convex portion 301, the first fixed concave portion 311, and the first non-fixed concave portion 321 are provided on the second plate 212 of the adapter body 200.

[0049] In this embodiment, the first convex portion 301 protrudes on one side (here, the left side) in the clamping direction D2, that is, on the side opposite to the second end portion 6b. The first convex portion 301 protrudes to the left of the first end portion 6a of the adapter body 200. The first fixed concave portion 311 and the first non-fixed concave portion 321 are recessed toward the second end portion 6b side of the adapter 6. Note that the amount of recess of the first fixed concave portion 311 toward the second end portion 6b may be the same as or different from the amount of recess of the first non-fixed concave portion 321 toward the second end portion 6b. The first fixed concave portion 311 may or may not be recessed more toward the second end portion 6b side than the first non-fixed concave portion 321.

[0050] The second convex portion 302, the second fixed concave portion 312, and the second non-fixed concave portion 322 are provided at the second end portion 6b of the adapter 6. In this embodiment, the second convex portion 302, the second fixed concave portion 312, and the second non-fixed concave portion 322 are provided at the rear side portion 6d of the adapter 6. The second non-fixed concave portion 322, the second convex portion 302, and the second fixed concave portion 312 are arranged side by side in the attachment / detachment direction D1. Here, the second fixed concave portion 312 is located on one side (here, the front side) in the attachment / detachment direction D1 with respect to the second convex portion 302. The second non-fixed concave portion 322 is located on the other side (here, the rear side) in the attachment / detachment direction D1 with respect to the second convex portion 302. The position of the second convex portion 302 in the attachment / detachment direction D1 is the same as that of the first convex portion 301. The position of the second fixed concave portion 312 in the attachment / detachment direction D1 is the same as that of the first fixed concave portion 311. Similarly, the position of the second non-fixed concave portion 322 in the attachment / detachment direction D1 is the same as that of the first non-fixed concave portion 321. The second convex portion 302, the second fixed concave portion 312, and the second non-fixed concave portion 322 are provided on the second plate 212 of the adapter body 200.

[0051] In this embodiment, the second convex portion 302 protrudes on the other side (here, the right side) in the clamping direction D2, that is, on the side opposite to the first end portion 6a. The second convex portion 302 protrudes to the right of the second end portion 6b of the adapter main body 200. The second fixed concave portion 312 and the second non-fixed concave portion 322 are recessed on the first end portion 6a side of the adapter 6. Note that the amount of recess of the second fixed concave portion 312 toward the first end portion 6a may be the same as or different from the amount of recess of the second non-fixed concave portion 322 toward the first end portion 6a. The second fixed concave portion 312 may or may not be recessed more toward the first end portion 6a side than the second non-fixed concave portion 322.

[0052] As shown in FIG. 8, the adapter 6 has a first slide portion 251, a second slide portion 252, a first locking projection 261, and a second locking projection 262. The first slide portion 251 and the first locking projection 261 are provided at the first end portion 6a of the adapter 6. Here, the first slide portion 251 and the first locking projection 261 are provided on the frame 210 (see FIG. 9) of the adapter main body 200. The first slide portion 251 is provided at the central portion in the attachment / detachment direction D1 at the first end portion 6a and extends in the attachment / detachment direction D1. The first slide portion 251 is disposed on the front side of the first fixed concave portion 311. The first slide portion 251 protrudes to the left side in the clamping direction D2 from the first end portion 6a. Here, the first slide portion 251 protrudes to the left side in the clamping direction D2 from the first convex portion 301.

[0053] The first locking projection 261 is provided at the front side portion 6c of the adapter 6. Here, the first locking projection 261 is disposed on the front side of the first slide portion 251 and is continuous with the first slide portion 251. The first locking projection 261 protrudes to the left side in the clamping direction D2 from the first end portion 6a, that is, on the side opposite to the second end portion 6b. Here, the first locking projection 261 protrudes to the left side in the clamping direction D2 from the first convex portion 301 and protrudes to the left side in the clamping direction D2 from the first slide portion 251.

[0054] As shown in FIG. 8, the second slide portion 252 and the second locking projection 262 are provided at the second end portion 6b of the adapter 6 and are provided on the frame 210 (see FIG. 9) of the adapter body 200. The second slide portion 252 is provided at the central portion in the attachment / detachment direction D1 at the second end portion 6b and extends in the attachment / detachment direction D1. The second slide portion 252 is disposed on the front side of the second fixing recess 312. The position of the second slide portion 252 in the attachment / detachment direction D1 is the same as the position of the first slide portion 251 in the attachment / detachment direction D1. The second slide portion 252 protrudes to the right side in the clamping direction D2 from the second end portion 6b. Here, the second slide portion 252 protrudes to the right side in the clamping direction D2 from the second convex portion 302.

[0055] Similar to the first locking projection 261, the second locking projection 262 is provided on the front side portion 6c of the adapter 6. The position of the second locking projection 262 in the attachment / detachment direction D1 is the same as the position of the first locking projection 261 in the attachment / detachment direction D1. Here, the second locking projection 262 is disposed on the front side of the second slide portion 252 and is continuous with the second slide portion 252. The second locking projection 262 protrudes to the right side in the clamping direction D2 from the second end portion 6b, that is, on the side opposite to the first end portion 6a. Here, the second locking projection 262 protrudes to the right side in the clamping direction D2 from the second convex portions 302 and 252.

[0056] In this embodiment, as shown in FIG. 8, the adapter 6 has a first locking recess 271 and a second locking recess 272. The first locking recess 271 and the second locking recess 272 are arranged side by side in the clamping direction D2. Here, the first locking recess 271 is arranged to the left of the second locking recess 272. The first locking recess 271 and the second locking recess 272 are provided in the rear portion 6d of the adapter 6, specifically, at the rear end of the adapter body 200. Here, the first locking recess 271 and the second locking recess 272 are provided in the second plate 212 of the adapter body 200. The first locking recess 271 and the second locking recess 272 are arranged on the rear side in the attachment / detachment direction D1 with respect to the first non-fixed recess 321 and also on the rear side in the attachment / detachment direction D1 with respect to the second non-fixed recess 322. The first locking recess 271 and the second locking recess 272 are recessed from the rear end of the adapter body 200 toward the front side. The shapes of the first locking recess 271 and the second locking recess 272 are not particularly limited, and for example, they are semi-circular shapes.

[0057] FIG. 10 is a plan view showing the workpiece 5 and the workholder 30 when the workpiece 5 is located at the holding position P11, and is a view showing a state in which the workholder 30 holds the workpiece 5. As shown in FIG. 10, the workholder 30 according to this embodiment holds the adapter 6 having the above-described configuration, and thus holds the workpiece 5 held by the adapter 6. The workholder 30 is configured to be able to hold the workpiece 5 when the user manually moves the workpiece 5 from the front to the rear in the attachment / detachment direction D1 with respect to the workholder 30 and the workpiece 5 is arranged at the holding position P11. Next, the configuration of the workholder 30 will be described in detail.

[0058] In this embodiment, as shown in FIG. 7, the work holder 30 includes a first arm 101, a second arm 102, and a connecting portion 103. The first arm 101 and the second arm 102 extend in the attachment / detachment direction D1. Also, the first arm 101 and the second arm 102 are arranged side by side in the clamping direction D2. Here, the first arm 101 is arranged to the left of the second arm 102. As shown in FIG. 10, the workpiece 5 is arranged between the first arm 101 and the second arm 102 and is clamped by the first arm 101 and the second arm 102.

[0059] As shown in FIG. 7, the connecting portion 103 connects the first arm 101 and the second arm 102. The connecting portion 103 extends in the clamping direction D2. Here, the left end portion of the connecting portion 103 is connected to the rear end portion of the first arm 101. The right end portion of the connecting portion 103 is connected to the rear end portion of the second arm 102. Here, the first arm 101, the second arm 102, and the connecting portion 103 are formed in a U shape. In this embodiment, as shown in FIG. 5, when the workpiece 5 is arranged at the holding position P11, the adapter 6 that holds the workpiece 5 abuts against the connecting portion 103.

[0060] As shown in FIG. 7, the first arm 101 includes a first clamping mechanism 110. The second arm 102 includes a second clamping mechanism 120. In this embodiment, as shown in FIG. 10, the workpiece 5 is held by clamping the workpiece 5 with the first clamping mechanism 110 and the second clamping mechanism 120. The first clamping mechanism 110 and the second clamping mechanism 120 are arranged at the same position in the attachment / detachment direction D1. Here, the first clamping mechanism 110 and the second clamping mechanism 120 are arranged in the rear side portion when, for example, the work holder 30 is bisected in the attachment / detachment direction D1. The first clamping mechanism 110 and the second clamping mechanism 120 face each other. Here, the first clamping mechanism 110 and the second clamping mechanism 120 have corresponding configurations.

[0061] In this embodiment, as shown in FIG. 7, the first clamping mechanism 110 includes a first rotating shaft 111, a first swinging member 112, a first fixed rotating shaft 113, a first clamping portion 114, a first lever 116, and a first elastic member 118. The first rotating shaft 111 extends in the Z-axis direction. The first rotating shaft 111 is provided on the first arm 101 and extends upward in the Z-axis direction from the upper surface of the first arm 101. The first swinging member 112 is provided on the first rotating shaft 111 and is rotatable about the first rotating shaft 111. Here, the first swinging member 112 is a plate-shaped member extending in the front-rear direction. One end portion (here, the front end portion) of the first swinging member 112 is provided on the first rotating shaft 111. The first swinging member 112 extends obliquely rearward and rightward from the first rotating shaft 111. The first swinging member 112 is rotatable about the first rotating shaft 111 on the first arm 101.

[0062] A first fixed rotating shaft 113 is provided at the other end portion (here, the rear end portion) of the first swinging member 112. The first fixed rotating shaft 113 extends in the Z-axis direction. The first clamping portion 114 is movable in the clamping direction D2 (specifically, the direction opposite to the second arm 102 in the clamping direction D2). Here, the first clamping portion 114 is rotatable about the first rotating shaft 111 and is a portion that clamps the adapter 6 holding the workpiece 5 as shown in FIG. 10. In this embodiment, the first clamping portion 114 is provided at the other end portion of the first swinging member 112. Specifically, the first clamping portion 114 is provided on the first fixed rotating shaft 113 and is provided at the other end portion of the first swinging member 112 via the first fixed rotating shaft 113. The first clamping portion 114 is configured to be rotatable about the first rotating shaft 111 together with the first swinging member 112.

[0063] In this embodiment, as shown in FIG. 7, the first clamping portion 114 is configured to be rotatable about the first fixed rotation axis 113. In a state where the adapter 6 is not held by the workpiece holder 30, the first clamping portion 114 is arranged at a position where the first convex portion 301 of the adapter 6 passes when the workpiece 5 moves toward the holding position P11 along the attachment / detachment direction D1 with respect to the workpiece holder 30. Here, the first clamping portion 114 is rotatable between a first fixed rotation position R11 (see FIG. 10) and a first non-fixed rotation position R12 (see FIG. 7) about the first fixed rotation axis 113. In this embodiment, the first clamping portion 114 has a shape eccentric with respect to the first fixed rotation axis 113. Here, the amount of protrusion of the first clamping portion 114 toward the second arm 102 side is different between the time when the first clamping portion 114 is at the first fixed rotation position R11 and the time when it is at the first non-fixed rotation position R12.

[0064] The first clamping portion 114 has a first fixed portion 115a and a first non-fixed portion 115b. As shown in FIG. 10, the first fixed portion 115a is a portion of the first clamping portion 114 that protrudes from the first fixed rotation axis 113 toward the second arm 102 when the first clamping portion 114 is at the first fixed rotation position R11. As shown in FIG. 7, the first non-fixed portion 115b is a portion of the first clamping portion 114 that protrudes from the first fixed rotation axis 113 toward the second arm 102 when the first clamping portion 114 is at the first non-fixed rotation position R12. As shown in FIG. 10, when the first clamping portion 114 is at the first fixed rotation position R11, the first non-fixed portion 115b protrudes forward from the first fixed rotation axis 113. Also, as shown in FIG. 7, when the first clamping portion 114 is at the first non-fixed rotation position R12, the first fixed portion 115a protrudes rearward from the first fixed rotation axis 113. Here, the amount of protrusion of the first fixed portion 115a is larger than that of the first non-fixed portion 115b.

[0065] The first lever 116 is gripped by the user. The first lever 116 is provided on the first clamping portion 114 and rotates the first clamping portion 114 around the first fixed rotation axis 113. The first lever 116 is rod-shaped. In the present embodiment, the first lever 116 is integrally formed with the first clamping portion 114. As shown in FIG. 7, when the first clamping portion 114 is at the first non-fixed rotation position R12, the first lever 116 extends obliquely rearward from the first clamping portion 114 and away from the second arm 102 (leftward in this case). As shown in FIG. 10, when the first clamping portion 114 is at the first fixed rotation position R11, the first lever 116 extends obliquely rearward from the first clamping portion 114 and toward the second arm 102 (rightward in this case). Therefore, by the user rotating the first lever 116 from left to right, the rotation position of the first clamping portion 114 can be switched from the first non-fixed rotation position R12 to the first fixed rotation position R11. On the other hand, by the user rotating the first lever 116 from right to left, the rotation position of the first clamping portion 114 can be switched from the first fixed rotation position R11 to the first non-fixed rotation position R12.

[0066] In addition, in the present embodiment, as shown in FIG. 10, the adapter 6 includes a first stopper 281 provided at the first end portion 6a. The first stopper 281 is provided on the rear side portion 6d of the adapter 6 and is disposed rearward of the first non-fixed recess 321. The first stopper 281 faces rearward and leftward and is a flat surface extending in the Z-axis direction. Here, when the workpiece 5 is located at the holding position P11 and the rotation position of the first clamping portion 114 of the first arm 101 is at the first fixed rotation position R11, the first lever 116 is configured to contact the first stopper 281.

[0067] As shown in FIG. 10, the first elastic member 118 is a member that applies a pressing force to the first clamping portion 114 toward the second arm 102 side. The type of the first elastic member 118 is not particularly limited, but here it is a leaf spring. The first elastic member 118 is provided on the left side surface of the first arm 101 and applies a pressing force to the first clamping portion 114 from the left. Here, the pressing force is the elastic force of the first elastic member 118. FIG. 11 is a perspective view showing the first clamping portion 114, the first lever 116, and the first pressed portion 119. In the present embodiment, as shown in FIG. 11, the first pressed portion 119 is provided on the first clamping portion 114. The pressed portion 119 extends downward from the first clamping portion 114, for example, and is sandwiched between the first elastic member 118 and the first swing member 112 as shown in FIG. 7. The first elastic member 118 presses the pressed portion 119 toward the second arm 102 side, so that the first clamping portion 114 rotates around the first rotation axis 111 together with the first swing member 112 and is pressed toward the second arm 102 side. When a force in the direction opposite to the pressing force of the first elastic member 118 and larger than the pressing force is applied to the first clamping portion 114, the first clamping portion 114 rotates around the first rotation axis 111 against the pressing force and moves to the side opposite to the second arm 102 side. Then, when the force in the direction opposite to the pressing force is no longer applied to the first clamping portion 114, the first clamping portion 114 moves toward the second arm 102 side by the pressing force.

[0068] Note that the second clamping mechanism 120 provided on the second arm 102 has a configuration corresponding to the first clamping mechanism 110. Here, as shown in FIG. 7, the second clamping mechanism 120 includes a second rotation axis 121, a second swing member 122, a second fixed rotation axis 123, a second clamping portion 124, a second lever 126, and a second elastic member 128. The second rotation axis 121 extends upward in the Z-axis direction from the upper surface of the second arm 102. The second swing member 122 is provided on the second rotation axis 121 and is rotatable about the second rotation axis 121. Here, the second swing member 122 is a plate-shaped member extending in the front-rear direction, and one end portion (here, the front end portion) is provided on the second rotation axis 121. The second swing member 122 obliquely extends rearward and leftward from the second rotation axis 121 on the second arm 102.

[0069] At the other end (here, the rear end) of the second swinging member 122, a second fixed rotation shaft 123 extending in the Z-axis direction is provided. The second clamping portion 124 is rotatable about the second rotation shaft 121. As shown in FIG. 10, the second clamping portion 124, together with the first clamping portion 114, is a portion for clamping the adapter 6 holding the workpiece 5. The second clamping portion 124 is movable in the clamping direction D2 (specifically, the direction opposite to the first arm 101 in the clamping direction D2). Here, in the present embodiment, the second clamping portion 124 is provided on the second fixed rotation shaft 123 and is provided at the other end of the second swinging member 122 via the second fixed rotation shaft 123. The second clamping portion 124 is configured to be rotatable about the second rotation shaft 121 together with the second swinging member 122.

[0070] In a state where the adapter 6 is not held by the workpiece holder 30, the second clamping portion 124 is configured to be disposed at a position where the second convex portion 302 of the adapter 6 passes when the workpiece 5 moves toward the holding position P11 along the attachment / detachment direction D1 with respect to the workpiece holder 30. In the present embodiment, the second clamping portion 124 is configured to be rotatable between a second fixed rotation position R21 (see FIG. 10) and a second non-fixed rotation position R22 (see FIG. 7) about the second fixed rotation shaft 123. In the present embodiment, the second clamping portion 124 has a shape eccentric with respect to the second fixed rotation shaft 123. Here, the protruding amount of the second clamping portion 124 toward the first arm 101 side is different between the time of the second fixed rotation position R21 and the time of the second non-fixed rotation position R22.

[0071] As shown in FIG. 7, the second clamping portion 124 has a second fixed portion 125a and a second non-fixed portion 125b. As shown in FIG. 10, the second fixed portion 125a is the portion of the second clamping portion 124 that protrudes from the second fixed rotation axis 123 toward the first arm 101 when the second clamping portion 124 is at the second fixed rotation position R21. As shown in FIG. 7, the second non-fixed portion 125b is the portion of the second clamping portion 124 that protrudes from the second fixed rotation axis 123 toward the first arm 101 when the second clamping portion 124 is at the second non-fixed rotation position R22. As shown in FIG. 10, when the second clamping portion 124 is at the second fixed rotation position R21, the second non-fixed portion 125b protrudes forward from the second fixed rotation axis 123. Also, as shown in FIG. 7, when the second clamping portion 124 is at the second non-fixed rotation position R22, the second fixed portion 125a protrudes rearward from the second fixed rotation axis 123. Here, the protruding amount of the second fixed portion 125a is larger than that of the second non-fixed portion 125b.

[0072] The second lever 126 is for the user to grip. The second lever 126 is provided on the second clamping portion 124 and rotates the second clamping portion 124 around the second fixed rotation axis 123. The second lever 126 is rod-shaped, similar to the first lever 116. In the present embodiment, the second lever 126 is integrally formed with the second clamping portion 124. As shown in FIG. 7, when the second clamping portion 124 is at the second non-fixed rotation position R22, the second lever 126 extends obliquely rearward from the second clamping portion 124 and away from the first arm 101 (rightward here). As shown in FIG. 10, when the second clamping portion 124 is at the second fixed rotation position R21, the second lever 126 extends obliquely rearward from the second clamping portion 124 and toward the first arm 101 (leftward here). Therefore, for example, when the user rotates the second lever 126 from right to left, the rotation position of the second clamping portion 124 can be switched from the second non-fixed rotation position R22 to the second fixed rotation position R21.

[0073] In addition, in the present embodiment, the adapter 6 includes a second stopper 282 provided at the second end portion 6b. The second stopper 282 is provided at the rear side portion 6d of the adapter 6 and is disposed rearward of the second non-fixed recess 322. The second stopper 282 is a flat surface that faces rearward and rightward and extends in the Z-axis direction. Here, as shown in FIG. 10, when the workpiece 5 is located at the holding position P11 and the rotational position of the second clamping portion 124 of the second arm 102 is at the second fixed rotational position R21, the second lever 126 is configured to contact the second stopper 282.

[0074] The second elastic member 128 is a member that applies a pressing force to the second clamping portion 124 toward the first arm 101 side. The type of the second elastic member 128 is not particularly limited, but here, similar to the first elastic member 118, it is a leaf spring. The second elastic member 128 is provided on the right side surface of the second arm 102 and applies a pressing force to the second clamping portion 124 from the right side. In the present embodiment, the second clamping portion 124 is provided with a second pressed portion 129 (see FIG. 7) similar to the first pressed portion 119 (see FIG. 11). The second pressed portion 129 extends downward from the second clamping portion 124, for example, and is sandwiched between the second elastic member 128 and the second swing member 122. The second elastic member 128 presses the second pressed portion 129 toward the first arm 101 side, so that the second clamping portion 124 rotates around the second rotation axis 121 together with the second swing member 122 and is pressed against the first arm 101 side. When a force in the direction opposite to the pressing force of the second elastic member 128 and greater than the pressing force is applied to the second clamping portion 124, the second clamping portion 124 rotates around the second rotation axis 121 against the pressing force and moves to the side opposite to the first arm 101 side. Then, when the force in the direction opposite to the pressing force is no longer applied to the second clamping portion 124, the second clamping portion 124 moves toward the first arm 102 side by the pressing force.

[0075] In the present embodiment, as shown in FIG. 7, in a state where the adapter 6 is not held by the workpiece holder 30 (that is, a state where the workpiece 5 is located at the non-holding position P12), the distance in the clamping direction D2 between the first clamping portion 114 and the second clamping portion 124 is referred to as the first distance D11. The first distance D11 is the distance in the clamping direction D2 between the right end of the first clamping portion 114 and the left end of the second clamping portion 124. The first distance D11 is the distance in the clamping direction D2 between the first non-fixed portion 115b (specifically, the right end of the first non-fixed portion 115b) of the first clamping portion 114 and the second non-fixed portion 125b (specifically, the left end of the second non-fixed portion 125b) of the second clamping portion 124 when the first clamping portion 114 is at the first non-fixed rotation position R12 and the second clamping portion 124 is at the second non-fixed rotation position R22.

[0076] As shown in FIG. 7, in the adapter 6, the distance in the clamping direction D2 between the first convex portion 301 and the second convex portion 302 is referred to as the second distance D12. Specifically, the second distance D12 is the distance in the clamping direction D2 between the left end of the first convex portion 301 and the right end of the second convex portion 302. Here, the first distance D11 is shorter than the second distance D12. Here, the first distance D11 is slightly shorter than the second distance D12.

[0077] Also, in the present embodiment, in the adapter 6, the distance in the clamping direction D2 between the first non-fixed concave portion 321 and the second non-fixed concave portion 322 is referred to as the third distance D13. The third distance D13 is the distance in the clamping direction D2 between the right end of the first non-fixed concave portion 321 and the left end of the second non-fixed concave portion 322. Further, in the adapter 6, the distance in the clamping direction D2 between the first fixed concave portion 311 and the second fixed concave portion 312 is referred to as the fourth distance D14. The fourth distance D14 is the distance in the clamping direction D2 between the right end of the first fixed concave portion 311 and the left end of the second fixed concave portion 312. In the present embodiment, the third distance D13 is shorter than the first distance D11. The fourth distance D14 is shorter than the first distance D11. Here, the third distance D13 and the fourth distance D14 are each slightly shorter than the first distance D11. Also, the third distance D13 and the fourth distance D14 are each shorter than the second distance D12. The third distance D13 and the fourth distance D14 are the same. However, the third distance D13 may be different from the fourth distance D14. For example, it may be shorter than the fourth distance D14 or longer than the fourth distance D14.

[0078] In this embodiment, as shown in FIG. 7, the first arm 101 includes a first slidable portion 131 and a first guide roller 132. The second arm 102 includes a second slidable portion 141 and a second guide roller 142. The first slidable portion 131 and the first guide roller 132 are disposed forward of the first clamping mechanism 110. The first slidable portion 131 extends in the attachment / detachment direction D1, and is a portion where the first slide portion 251 of the adapter 6 that holds the workpiece 5 slides while contacting when attaching / detaching the workpiece 5 to / from the workpiece holder 30. The first guide roller 132 is provided on the first slidable portion 131. The first guide roller 132 is configured to be rotatable with respect to the first slidable portion 131, and guides the sliding movement of the first slide portion 251 of the adapter 6. Here, when the first slide portion 251 slides on the first slidable portion 131, it contacts the first guide roller 132. At this time, the first guide roller 132 rotates as the first slide portion 251 moves. In this embodiment, as shown in FIG. 10, when the workpiece 5 is disposed at the holding position P11, the first locking projection 261 of the adapter 6 locks by contacting the first guide roller 132.

[0079] As shown in FIG. 7, the second slidable portion 141 and the second guide roller 142 are disposed forward of the second clamping mechanism 120. The second slidable portion 141 extends in the attachment / detachment direction D1, and is a portion where the second slide portion 252 of the adapter 6 slides while contacting when attaching / detaching the workpiece 5 to / from the workpiece holder 30. The second guide roller 142 is provided on the second slidable portion 141. The second guide roller 142 is configured to be rotatable with respect to the second slidable portion 141, and guides the sliding movement of the second slide portion 252 of the adapter 6. Here, when the second slide portion 252 slides on the second slidable portion 141, it contacts the second guide roller 142. At this time, the second guide roller 142 rotates as the second slide portion 252 moves. In this embodiment, as shown in FIG. 10, when the workpiece 5 is disposed at the holding position P11, the second locking projection 262 of the adapter 6 locks by contacting the second guide roller 142.

[0080] In this embodiment, as shown in FIG. 7, the connecting portion 103 has a first fitting portion 151 and a second fitting portion 152. The first fitting portion 151 and the second fitting portion 152 are provided on the upper surface of the connecting portion 103. The first fitting portion 151 and the second fitting portion 152 are arranged side by side in the clamping direction D2. In this embodiment, the first fitting portion 151 and the second fitting portion 152 are rollers that are rotatable with respect to the connecting portion 103. However, the types of the first fitting portion 151 and the second fitting portion 152 are not particularly limited. Here, as shown in FIG. 10, when the workpiece 5 is disposed at the holding position P11, the first fitting portion 151 fits into the first locking recess 271 of the adapter 6. At this time, the second fitting portion 152 fits into the second locking recess 272 of the adapter 6.

[0081] The configuration of the workpiece holder 30 has been described above. Next, a procedure for the user to manually attach and hold the workpiece 5 to the workpiece holder 30 or remove it from the workpiece holder 30 will be described. Here, when attaching the workpiece 5 to the workpiece holder 30, the workpiece holder 30 is disposed at the replacement position P4 (see FIG. 6) in the cutting area A1. As shown in FIG. 4, the user first slides the slide cover 60 upward to open the first opening 12a formed in the case body 10. At this time, through the first opening 12a, the cutting area A1 and the outside of the cutting machine 100 are in a communicating state. The user can put the hand holding the workpiece 5 into the cutting area A1 through the first opening 12a and attach the workpiece 5 to the workpiece holder 30.

[0082] When the user manually attaches the workpiece 5 to the workpiece holder 30, as shown in FIG. 7, the workpiece 5 held by the adapter 6 is placed at a position in front of the workpiece holder 30, here at the non-holding position P12. At this time, while the first end portion 6a of the adapter 6 is positioned on the side of the first arm 101 and the second end portion 6b is positioned on the side of the second arm 102, the workpiece 5 is oriented such that the first clamping mechanism 110 and the second clamping mechanism 120 are positioned behind the first slide portion 251 and the second slide portion 252. Also, in the workpiece holder 30, the rotational position of the first clamping portion 114 is the first non-fixed rotational position R12, and the rotational position of the second clamping portion 124 is the second non-fixed rotational position R22. In such a state, the user moves the workpiece 5 along the rearward direction of the attachment / detachment direction D1, as indicated by the arrow A20 in FIG. 7, toward the space between the first arm 101 and the second arm 102. Here, the user moves the workpiece 5 from the non-holding position P12 toward the holding position P11 (see FIG. 10).

[0083] FIG. 12 is a plan view showing a state in which the workpiece 5 is sliding relative to the workpiece holder 30. When the workpiece 5 moves rearward in the attachment / detachment direction D1 toward the holding position P11, as shown in FIG. 12, the first slide portion 251 of the adapter 6 slides on the first slidable portion 131 of the first arm 101 while contacting the first slidable portion 131. At this time, the first slide portion 251 may contact the first guide roller 132. By moving while the first slide portion 251 contacts the first guide roller 132, the first guide roller 132 can guide the movement of the first slide portion 251. Also, when the workpiece 5 moves rearward in the attachment / detachment direction D1, the second slide portion 252 of the adapter 6 slides on the second slidable portion 141 of the second arm 102 while contacting the second slidable portion 141. At this time, the second slide portion 252 may slide while contacting the second guide roller 142. As a result, the second guide roller 142 can guide the movement of the second slide portion 252.

[0084] FIG. 13 is a plan view showing the workpiece 5 and the workpiece holder 30 when the workpiece 5 is located at the intermediate position P13. As described above, when the workpiece 5 slides rearward in the attachment / detachment direction D1 along the first slide portion 131 and the second slide portion 141 of the workpiece holder 30, as shown in FIG. 13, the first convex portion 301 of the adapter 6 contacts the first clamping portion 114 of the first arm 101, and the second convex portion 302 contacts the second clamping portion 124 of the second arm 102. As described above, as shown in FIG. 7, the first distance D11 in the clamping direction D2 between the first clamping portion 114 and the second clamping portion 124 is shorter than the second distance D12 in the clamping direction D2 between the first convex portion 301 and the second convex portion 302 of the adapter 6. Therefore, as shown in FIG. 13, the adapter 6 contacts the first clamping portion 114 and the second clamping portion 124. Specifically, the first non-fixed portion 115b of the first clamping portion 114 contacts the first convex portion 301, and the second non-fixed portion 125b of the second clamping portion 124 contacts the second convex portion 302. This restricts the movement of the workpiece 5 in the attachment / detachment direction D1.

[0085] Thus, when the adapter 6 holding the workpiece 5 contacts the first clamping portion 114 and the second clamping portion 124, the position of the workpiece 5 with respect to the workpiece holder 30 is referred to as the intermediate position P13. The intermediate position P13 is a position where the workpiece 5 is moving along the attachment / detachment direction D1 toward the holding position P11. The intermediate position P13 is located behind the non-holding position P12 and in front of the holding position P11.

[0086] Note that when the workpiece 5 is located at the intermediate position P13, the first non-fixed concave portion 321 of the adapter 6 is disposed to the right of the first clamping portion 114 of the first arm 101, and the second non-fixed concave portion 322 of the adapter 6 is disposed to the left of the second clamping portion 124 of the second arm 102. In the present embodiment, as shown in FIG. 7, the third distance D13 in the clamping direction D2 between the first non-fixed concave portion 321 and the second non-fixed concave portion 322 is shorter than the above-described first distance D11. Therefore, as shown in FIG. 13, when the workpiece 5 is located at the intermediate position P13, the first clamping portion 114 does not contact the first non-fixed concave portion 321, and the second clamping portion 124 does not contact the second non-fixed concave portion 322.

[0087] When the user applies an additional force to the workpiece 5 in the rearward direction of the attachment / detachment direction D1 at the intermediate position P13, the workpiece 5 passes through the intermediate position P13. At this time, the first clamping portion 114 is pushed by the first convex portion 301 and rotates leftward about the first rotation axis 111 as indicated by arrow A21 against the pressing force applied by the first elastic member 118. The second clamping portion 124 is pushed by the second convex portion 302 and rotates rightward about the second rotation axis 121 as indicated by arrow A22 against the pressing force applied by the second elastic member 128. At this time, as the distance between the first clamping portion 114 and the second clamping portion 124 widens, the first convex portion 301 and the second convex portion 302 of the adapter 6 pass between the first clamping portion 114 and the second clamping portion 124 while being in contact with the first clamping portion 114 and the second clamping portion 124, respectively.

[0088] FIG. 14 is a plan view showing the workpiece 5 and the workpiece holder 30 when the workpiece 5 is located at the holding position P11, and shows a state in which the rotational position of the first clamping portion 114 is the first non-fixed rotational position R12 and the rotational position of the second clamping portion 124 is the second non-fixed rotational position R22. In this way, when the workpiece 5 passes through the intermediate position P13, as shown in FIG. 14, the workpiece 5 is located at the holding position P11. At this time, the rotational position of the first clamping portion 114 is the first non-fixed rotational position R12, and the rotational position of the second clamping portion 124 is the second non-fixed rotational position R22. Therefore, when the workpiece 5 is located at the holding position P11, the first fixed concave portion 311 of the adapter 6 is disposed to the right of the first clamping portion 114 (specifically, the first non-fixed portion 115b), and the second fixed concave portion 312 of the adapter 6 is disposed to the left of the second clamping portion 124 (specifically, the second non-fixed portion 125b). Here, as shown in FIG. 7, the fourth distance D14 in the clamping direction D2 between the first fixed concave portion 311 and the second fixed concave portion 312 is shorter than the above-described first distance D11. Therefore, as shown in FIG. 14, the first fixed concave portion 311 does not contact the first clamping portion 114 (here, the first non-fixed portion 115b), and the second fixed concave portion 312 does not contact the second clamping portion 124 (here, the second non-fixed portion 125b).

[0089] As shown in FIG. 14, when the workpiece 5 is positioned at the holding position P11, the first locking protrusion 261 of the adapter 6 abuts against the first guide roller 132 of the first arm 101, and the second locking protrusion 262 of the adapter 6 abuts against the second guide roller 142 of the second arm 102. Further, when the workpiece 5 is positioned at the holding position P11, the first fitting portion 151 and the second fitting portion 152 of the connecting portion 103 are respectively fitted into the first locking recess 271 and the second locking recess 272 of the adapter 6. By these means, the movement of the workpiece 5 can be restricted so as not to move backward from the holding position P11.

[0090] Thus, after the workpiece 5 is positioned at the holding position P11, the user operates the first lever 116 as indicated by the arrow A23 in FIG. 14 so that the first clamping portion 114 rotates from the first non-fixed rotation position R12 to the first fixed rotation position R11 (see FIG. 10). Similarly, the user operates the second lever 126 as indicated by the arrow A24 in FIG. 14 so that the second clamping portion 124 rotates from the second non-fixed rotation position R22 to the second fixed rotation position R21 (see FIG. 10). As a result, as shown in FIG. 10, the first fixed portion 115a of the first clamping portion 114 contacts the first fixed recess 311 of the adapter 6 and is pressed against the first fixed recess 311. Similarly, the second fixed portion 125a of the second clamping portion 124 contacts the second fixed recess 312 of the adapter 6 and is pressed against the second fixed recess 312. Thus, the workpiece 5 is clamped by the first clamping portion 114 and the second clamping portion 124, and the position of the workpiece 5 with respect to the workpiece holder 30 is fixed. Therefore, the workpiece holder 30 can hold the workpiece 5. When the rotation position of the first clamping portion 114 is the first fixed rotation position R11, the first lever 116 contacts the first stopper 281 of the adapter 6, and the movement to the right is restricted. When the rotation position of the second clamping portion 124 is the second fixed rotation position R21, the second lever 126 contacts the second stopper 282 of the adapter 6, and the movement to the left is restricted.

[0091] When removing the workpiece 5 from the workpiece holder 30, it is advisable to perform the procedure opposite to the procedure of attaching the workpiece 5 to the workpiece holder 30 described above. Although detailed description is omitted, when removing the workpiece 5 from the workpiece holder 30, as shown in FIG. 14, in a state where the workpiece 5 is located at the holding position P11, the user operates the first lever 116 and the second lever 126, thereby rotating the first clamping portion 114 from the first fixed rotation position R11 to the first non-fixed rotation position R12 while rotating the second clamping portion 124 from the second fixed rotation position R21 to the second non-fixed rotation position R22. This releases the clamping state of the workpiece 5 by the first clamping portion 114 and the second clamping portion 124.

[0092] Thereafter, the user pulls out the workpiece 5 forward in the attachment / detachment direction D1 so that the workpiece 5 moves from the holding position P11 toward the non-holding position P12. Here, when the workpiece 5 passes through the intermediate position P13, the first convex portion 301 and the second convex portion 302 of the adapter 6 contact the first clamping portion 114 and the second clamping portion 124, respectively. At this time, the user applies more force to the workpiece 5 forward in the attachment / detachment direction D1. As a result, the first clamping portion 114 and the second clamping portion 124 are pushed by the first convex portion 301 and the second convex portion 302, respectively, so that the distance between the first clamping portion 114 and the second clamping portion 124 widens. Therefore, the workpiece 5 can pass through the intermediate position P13.

[0093] After the workpiece 5 passes through the intermediate position P13, as shown in FIG. 12, while the first slide portion 251 slides on the first slidable portion 131 of the first arm 101 and the second slide portion 252 slides on the second slidable portion 141 of the second arm 102, the workpiece 5 moves forward in the attachment / detachment direction D1. Then, as shown in FIG. 7, when the workpiece 5 is located at the non-holding position P12, the workpiece 5 is disposed in front of the workpiece holder 30. Thus, the user can manually remove the workpiece 5 from the workpiece holder 30.

[0094] As described above, in the present embodiment, as shown in FIG. 5, when machining the workpiece 5, the machining machine 100 includes a workholder 30 which is an example of a holding device that holds an adapter 6 for holding the workpiece 5. The workholder 30 is configured such that the user can manually move the workpiece 5 from one side (here, the front) to the other side (here, the rear) in the attachment / detachment direction D1 with respect to the workholder 30, and the workpiece 5 can be held when it is disposed at the holding position P11 with respect to the workholder 30 as shown in FIG. 10. The workholder 30 includes a first arm 101, a second arm 102, and a connecting portion 103. The first arm 101 extends in the attachment / detachment direction D1. The second arm 102 is arranged side by side with the first arm 101 in the clamping direction D2 intersecting the attachment / detachment direction D1, extends in the attachment / detachment direction D1, and clamps the workpiece 5 together with the first arm 101. The connecting portion 103 connects the end portion (here, the rear end portion) on the other side in the attachment / detachment direction D1 of the first arm 101 and the end portion (here, the rear end portion) on the other side in the attachment / detachment direction D1 of the second arm 102. As shown in FIG. 8, the adapter 6 is provided at a first end portion 6a on one side in the clamping direction D2, and has a first convex portion 301 protruding to one side in the clamping direction D2 (here, the left side), and is provided at a second end portion 6b on the other side in the clamping direction D2, and has a second convex portion 302 protruding to the other side in the clamping direction D2 (here, the right side). As shown in FIG. 7, the first arm 101 has a first clamping portion 114 movable in the clamping direction D2, and a first elastic member 118 that applies a pressing force to the first clamping portion 114 toward the second arm 102 side. The second arm 102 has a second clamping portion 124 movable in the clamping direction D2, and a second elastic member 128 that applies a pressing force to the second clamping portion 124 toward the first arm 101 side. In a state where the adapter 6 is not held by the workholder 30, the first clamping portion 114 is disposed at a position where the first convex portion 301 of the adapter 6 passes when the workpiece 5 moves toward the holding position P11 along the attachment / detachment direction D1 with respect to the workholder 30. Also, in a state where the adapter 6 is not held by the workholder 30, the second clamping portion 124 is disposed at a position where the second convex portion 302 of the adapter 6 passes when the workpiece 5 moves toward the holding position P11 along the attachment / detachment direction D1 with respect to the workholder 30.The first distance D11 in the clamping direction D2 between the first clamping portion 114 and the second clamping portion 124 is shorter than the second distance D12 in the clamping direction D2 between the first convex portion 301 and the second convex portion 302 of the adapter 6. As shown in FIG. 13, when the workpiece 5 is moving toward the holding position P11 (see FIG. 10) along the attachment / detachment direction D1 with respect to the workpiece holder 30 and passes through an intermediate position P13 located on one side (here, the front side) of the attachment / detachment direction D1 from the holding position P11, the first convex portion 301 of the adapter 6 contacts the first clamping portion 114, and the second convex portion 302 of the adapter 6 contacts the second clamping portion 124.

[0095] Accordingly, when attaching and holding the workpiece 5 to the workpiece holder 30, the user moves the workpiece 5 in the attachment / detachment direction D1 toward the holding position P11. Here, when the workpiece 5 passes through the intermediate position P13, the user applies a force to the workpiece 5 toward the holding position P11, so that the first convex portion 301 and the second convex portion 302 of the adapter 6 are pressed against the first clamping portion 114 and the second clamping portion 124, respectively. As a result, the first clamping portion 114 moves to the side opposite to the second clamping portion 124, and the second clamping portion 124 moves to the side opposite to the first clamping portion 114, and the distance between the first clamping portion 114 and the second clamping portion 124 increases. Thus, when the workpiece 5 passes through the intermediate position P13 and is located at the holding position P11 as shown in FIG. 10, the workpiece holder 30 can hold the workpiece 5. In this way, in the present embodiment, by giving the user a feeling of applying a force to the workpiece 5 when the workpiece 5 passes through the intermediate position P13, the workpiece 5 can be appropriately arranged at the holding position P11. Therefore, the user can easily sense sensually that the workpiece 5 is appropriately attached to the workpiece holder 30.

[0096] In this embodiment, the first clamping portion 114 is rotatable about the first rotation axis 111. The second clamping portion 124 is rotatable about the second rotation axis 121. Here, by rotating the first clamping portion 114 about the first rotation axis 111, it can be moved in the clamping direction D2 (specifically, the direction opposite to the second arm 102 in the clamping direction D2). Similarly, by rotating the second clamping portion 124 about the second rotation axis 121, it can be moved in the clamping direction D2 (specifically, the direction opposite to the first arm 101 in the clamping direction D2).

[0097] In this embodiment, as shown in FIG. 8, the adapter 6 is provided at the first end portion 6a on one side (here, the front side) of the detachment direction D1 with respect to the first convex portion 301, and has a first fixed recess 311 recessed toward the second end portion 6b side, and is provided at the second end portion 6b on one side of the detachment direction D1 with respect to the second convex portion 302, and has a second fixed recess 312 recessed toward the first end portion 6a side. As shown in FIG. 10, when the workpiece 5 is located at the holding position P11, the first clamping portion 114 fits into the first fixed recess 311 of the adapter 6, and the second clamping portion 124 fits into the second fixed recess 312 of the adapter 6. In this way, when the workpiece 5 is located at the holding position P11, by fitting the first clamping portion 114 and the second clamping portion 124 into the first fixed recess 311 and the second fixed recess 312 respectively, the workpiece 5 is clamped by the first clamping portion 114 and the second clamping portion 124, and the position of the workpiece 5 is fixed. Therefore, by clamping the workpiece 5 by the first clamping portion 114 and the second clamping portion 124, the workpiece holder 30 can hold the workpiece 5.

[0098] In this embodiment, as shown in FIG. 8, the adapter 6 is provided at the first end portion 6a on the other side (here, the rear side) of the detachment direction D1 from the first convex portion 301, and has a first non-fixed concave portion 321 recessed toward the second end portion 6b side, and a second non-fixed concave portion 322 provided at the second end portion 6b on the other side of the detachment direction D1 from the second convex portion 302 and recessed toward the first end portion 6a side. As shown in FIG. 7, the third distance D13 in the clamping direction D2 between the first non-fixed concave portion 321 and the second non-fixed concave portion 322 is shorter than the first distance D11. As a result, as shown in FIG. 13, when the workpiece 5 is located at the intermediate position P13, the first clamping portion 114 can be prevented from contacting the first non-fixed concave portion 321, and the second clamping portion 124 can be prevented from contacting the second non-fixed concave portion 322. Therefore, when the workpiece 5 is located at the intermediate position P13, the first clamping portion 114 can be made to contact only the first convex portion 301, and the second clamping portion 124 can be made to contact only the second convex portion 302.

[0099] In this embodiment, as shown in FIG. 7, the first arm 101 has a first swing member 112 with one end provided on the first rotation shaft 111 and the other end provided on the first clamping portion 114. The second arm 102 has a second swing member 122 with one end provided on the second rotation shaft 121 and the other end provided on the second clamping portion 124. As a result, as shown in FIG. 13, when a force acting against the pressing force of the first elastic member 118 is applied to the first clamping portion 114, the first clamping portion 114 can rotate around the first rotation shaft 111 together with the first swing member 112 as indicated by the arrow A21. Also, when a force acting against the pressing force of the second elastic member 128 is applied to the second clamping portion 124, the second clamping portion 124 can rotate around the second rotation shaft 121 together with the second swing member 122 as indicated by the arrow A22. Therefore, when the workpiece 5 passes through the intermediate position P13, the distance between the first clamping portion 114 and the second clamping portion 124 can be increased.

[0100] In the present embodiment, as shown in FIG. 7, the first arm 101 has a first fixed rotation shaft 113 provided at the other end of the first swing member 112. The first clamping portion 114 is provided on the first fixed rotation shaft 113 and is configured to be rotatable about the first fixed rotation shaft 113. Further, the first clamping portion 114 is rotatable between a first fixed rotation position R11 (see FIG. 10) and a first non-fixed rotation position R12 (see FIG. 7) about the first fixed rotation shaft 113. The first clamping portion 114 has a first non-fixed portion 115b and a first fixed portion 115a. As shown in FIG. 7, the first non-fixed portion 115b is a portion located on the side of the second arm 102 at the first non-fixed rotation position R12. As shown in FIG. 10, the first fixed portion 115a is a portion located on the side of the second arm 102 at the first fixed rotation position R11 and protruding further toward the second arm 102 side than the first non-fixed portion 115b at the first non-fixed rotation position R12. As a result, as shown in FIG. 14, when the workpiece 5 is located at the holding position P11, the first clamping portion 114 is rotated from the first non-fixed rotation position R12 to the first fixed rotation position R11 as indicated by the arrow A23. Therefore, as shown in FIG. 10, the first fixed portion 115a of the first clamping portion 114 is brought into contact with the first end portion 6a (specifically, the first fixed recess 311), and the first clamping portion 114 can clamp the side of the first end portion 6a of the adapter 6.

[0101] In the present embodiment, as shown in FIG. 7, the second arm 102 has a second fixed rotation shaft 123 provided at the other end of the second swing member 122. The second clamping portion 124 is provided on the second fixed rotation shaft 123 and is configured to be rotatable about the second fixed rotation shaft 123. Further, the second clamping portion 124 is rotatable between a second fixed rotation position R21 (see FIG. 10) and a second non-fixed rotation position R22 (see FIG. 7) about the second fixed rotation shaft 123. The second clamping portion 124 has a second non-fixed portion 125b and a second fixed portion 125a. As shown in FIG. 7, the second non-fixed portion 125b is a portion located on the first arm 101 side at the second non-fixed rotation position R22. As shown in FIG. 10, the second fixed portion 125a is a portion located on the first arm 101 side at the second fixed rotation position R21 and protruding more toward the first arm 101 side than the second non-fixed portion 125b at the second non-fixed rotation position R22. Thus, as shown in FIG. 14, when the workpiece 5 is located at the holding position P11, the second clamping portion 124 is rotated from the second non-fixed rotation position R22 to the second fixed rotation position R21 as indicated by the arrow A24. Therefore, as shown in FIG. 10, the second fixed portion 125a of the second clamping portion 124 is brought into contact with the second end portion 6b (specifically, the second fixed recess 312), and the second clamping portion 124 can clamp the second end portion 6b side of the adapter 6.

[0102] In the present embodiment, as shown in FIG. 7, the first arm 101 has a first lever 116 extending outward from the first clamping portion 114. The second arm 102 has a second lever 126 extending outward from the second clamping portion 124. Thus, the user can easily rotate the first clamping portion 114 about the first fixed rotation shaft 113 by operating the first lever 116. Also, the user can easily rotate the second clamping portion 124 about the second fixed rotation shaft 123 by operating the second lever 126.

[0103] In this embodiment, as shown in FIG. 10, the adapter 6 has a first stopper 281 provided at the first end portion 6a. When the workpiece 5 is located at the holding position P11 and the rotational position of the first clamping portion 114 is the first fixed rotational position R11, the first lever 116 contacts the first stopper 281. By this, when the rotational position of the first clamping portion 114 is the first fixed rotational position R11, the movement of the first lever 116 toward the adapter 6 side can be restricted. Thus, the rotation of the first clamping portion 114 around the first fixed rotation axis 113 can be restricted.

[0104] In this embodiment, the adapter 6 has a second stopper 282 provided at the second end portion 6b. When the workpiece 5 is located at the holding position P11 and the rotational position of the second clamping portion 124 is the second fixed rotational position R21, the second lever 126 contacts the second stopper 282. By this, when the rotational position of the second clamping portion 124 is the second fixed rotational position R21, the movement of the second lever 126 toward the adapter 6 side can be restricted. Thus, the rotation of the second clamping portion 124 around the second fixed rotation axis 123 can be restricted.

[0105] Note that, in this embodiment, the first clamping portion 114 was configured to be movable in the clamping direction D2 by rotating about the first rotation axis 111. However, the first rotation axis 111 may be omitted, and in this case, the first clamping portion 114 may be configured to be movable in the clamping direction D2 without rotating. Similarly, the second clamping portion 124 was configured to be movable in the clamping direction D2 by rotating about the second rotation axis 121. However, the second rotation axis 121 may be omitted, and the second clamping portion 124 may be configured to be movable in the clamping direction D2 without rotating. Also, at least one of the first clamping portion 114 and the second clamping portion 124 may be configured to be movable in the clamping direction D2, and the other may be configured to be immovable in the clamping direction D1.

Explanation of Reference Numerals

[0106] 5 Workpiece 6 Adapter 6a First end 6b Second end 30 Workholder (holding device) 100 Machine tool 101 First arm 102 Second arm 103 Connecting part 111 First rotating shaft 114 First clamping part 118 First elastic member 121 Second rotating shaft 124 Second clamping part 128 Second elastic member 301 First convex part 302 Second convex part 311 First fixed concave part 312 Second fixed concave part 321 First non-fixed concave part 322 Second non-fixed concave part D1 Insertion / removal direction D11 First distance D12 Second distance P11 Holding position P13 Intermediate position

Claims

1. When machining a workpiece, a holding device for holding an adapter for holding the workpiece is provided, the holding device is configured to move the workpiece from one side to the other side in the attachment / detachment direction with respect to the holding device, and to be able to hold the workpiece when the workpiece is disposed at the holding position, the holding device has a first arm extending in the attachment / detachment direction, and a second arm disposed alongside the first arm in a clamping direction intersecting the attachment / detachment direction, extending in the attachment / detachment direction, and clamping the workpiece together with the first arm, and is provided with the adapter is provided at a first end portion on one side of the clamping direction and has a first convex portion protruding on one side of the clamping direction, the first arm has a first clamping portion movable in the clamping direction, and a first elastic member applying a pressing force to the first clamping portion toward the second arm side, and has in a state where the adapter is not held by the holding device, the first clamping portion is configured to be disposed at a position where the first convex portion of the adapter passes when the workpiece moves toward the holding position along the attachment / detachment direction with respect to the holding device, A machining machine configured such that the first convex portion of the adapter contacts the first clamping portion when the workpiece passes through an intermediate position located on one side in the attachment / detachment direction rather than the holding position while the workpiece is moving toward the holding position along the attachment / detachment direction with respect to the holding device.

2. The adapter is provided at a second end portion on the other side of the clamping direction and has a second convex portion protruding on the other side of the clamping direction, the second arm has a second clamping portion movable in the clamping direction, and a second elastic member applying a pressing force to the second clamping portion toward the first arm side, and has in a state where the adapter is not held by the holding device, the second clamping portion is configured to be disposed at a position where the second convex portion of the adapter passes when the workpiece moves toward the holding position along the attachment / detachment direction with respect to the holding device, The machining machine according to claim 1, wherein the second convex portion of the adapter contacts the second clamping portion when the workpiece passes through the intermediate position.

3. The first arm has a first rotation axis, the second arm has a second rotation axis, the first clamping portion is rotatable about the first rotation axis, The cutting machine according to claim 2, wherein the second clamping part is rotatable about the second rotation axis.

4. The cutting machine according to claim 2, wherein, in a state where the adapter is not held by the holding device, a first distance in the clamping direction between the first clamping part and the second clamping part is shorter than a second distance in the clamping direction between the first convex part and the second convex part of the adapter.

5. The adapter is provided at the first end portion on one side in the attaching / detaching direction rather than the first convex part, and has a first fixing recess recessed toward the second end portion side, and provided at the second end portion on one side in the attaching / detaching direction rather than the second convex part, and has a second fixing recess recessed toward the first end portion side, and has When the workpiece is located at the holding position, the first clamping part fits into the first fixing recess of the adapter, and the second clamping part fits into the second fixing recess of the adapter. The cutting machine according to claim 2.

6. The adapter is provided at the first end portion on the other side in the attaching / detaching direction rather than the first convex part, and has a first non-fixing recess recessed toward the second end portion side, and provided at the second end portion on the other side in the attaching / detaching direction rather than the second convex part, and has a second non-fixing recess recessed toward the first end portion side, and has The cutting machine according to claim 4, wherein a third distance in the clamping direction between the first non-fixing recess and the second non-fixing recess is shorter than the first distance.

7. The first arm has a first swing member having one end provided on the first rotation axis and the other end provided on the first clamping part, The cutting machine according to claim 3, wherein the second arm has a second swing member having one end provided on the second rotation axis and the other end provided on the second clamping part.

8. The first arm has a first fixed rotation axis provided at the other end of the first swing member, The second arm has a second fixed rotation axis provided at the other end of the second swing member, The first clamping part is provided on the first fixed rotation axis and is configured to be rotatable about the first fixed rotation axis, The cutting machine according to claim 7, wherein the second clamping part is provided on the second fixed rotation axis and is configured to be rotatable about the second fixed rotation axis.

9. The first clamping part is rotatable between a first fixed rotation position and a first non-fixed rotation position about the first fixed rotation axis, The first clamping part is a first non-fixed portion located on the second arm side when in the first non-fixed rotational position; a first fixed portion located on the second arm side when in the first fixed rotational position and protruding further toward the second arm side than the first non-fixed portion when in the first non-fixed rotational position; The cutting machine according to claim 8, having the above.

10. The second clamping portion is rotatable between a second fixed rotational position and a second non-fixed rotational position about the second fixed rotation axis; The second clamping portion is a second non-fixed portion located on the first arm side when in the second non-fixed rotational position; a second fixed portion located on the first arm side when in the second fixed rotational position and protruding further toward the first arm side than the second non-fixed portion when in the second non-fixed rotational position; The cutting machine according to claim 9, having the above.

11. The first arm has a first lever extending outward from the first clamping portion beyond the first clamping portion. The cutting machine according to claim 9.

12. The adapter has a first stopper provided at the first end portion; When the workpiece is located at the holding position and the rotational position of the first clamping portion is the first fixed rotational position, the first lever contacts the first stopper. The cutting machine according to claim 11.

13. The second arm has a second lever extending outward from the second clamping portion beyond the second clamping portion. The cutting machine according to claim 10.

14. The adapter has a second stopper provided at the second end portion; When the workpiece is located at the holding position and the rotational position of the second clamping portion is the second fixed rotational position, the second lever contacts the second stopper. The cutting machine according to claim 13.

Images