Workpiece positioning jig

Abstract

To shorten work time required for making a plurality of poles fixable or movable, reduce a burden of a worker, and improve working efficiency of workpiece.SOLUTION: A workpiece positioning jig includes a mounting member 10 where workpiece W is stacked, a plurality of poles 20 movable in each radial direction, an interlock mechanism 40 moving the plurality of poles 20 in synchronization with each other, and a fixing mechanism 50 fixing the plurality of poles 20, wherein a mounting member 10 is supported on a top plate 30, the interlock mechanism 40 includes a guide plate 41 guiding the plurality of poles 20, and the fixing mechanism 50 includes a lifting mechanism 52 lifting a pressing part 51, makes the lifting mechanism 52 lift the pressing part 51 and lift the guide plate 41, collectively sandwiches first collars 21 (projection parts) provided on each lower part of the plurality of poles 20 between the top plate 30 and the guide plate 41 and thereby fixes the positions of the plurality of poles 20.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a work positioning jig.

Background Art

[0002] A work positioning jig for positioning stacked circular workpieces is known (see, for example, Patent Document 1). In this work positioning jig, a plurality of poles arranged so as to surround the stacked workpieces are each provided so as to be movable in the radial direction from the center of the workpiece, and an interlocking mechanism for synchronously moving these plurality of poles is provided. This work positioning jig positions the workpiece according to the inner diameter and outer diameter of the workpiece by moving a plurality of poles into contact with the workpiece and fixing the poles at that position.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The work positioning jig described in Patent Document 1 can move a plurality of poles in conjunction with each other according to the inner diameter and outer diameter of the workpiece, but it is necessary to fix these poles at a desired position. For example, each of the plurality of poles is fixed at a desired position by tightening a screw provided at the lower end of the pole. Further, when moving the plurality of poles, the screws for each pole are loosened and then moved. Thus, in both the case of fixing the poles at a desired position and the case of moving the poles, operations such as tightening a plurality of screws or loosening a plurality of screws are required. This requires a lot of work time to fix the poles or make the poles movable, not only imposing a burden on the operator, but also reducing the processing efficiency of the workpiece.

[0005] An object of the present invention is to provide a work positioning jig capable of shortening the working time required to fix or move a plurality of poles, reducing the burden on an operator, and improving the processing efficiency of a work.

Means for Solving the Problems

[0006] A work positioning jig according to an aspect of the present invention includes a placement member on which works are stacked, a plurality of poles arranged at predetermined intervals so as to surround the works placed on the placement member in a state of extending upward from the placement member, and each movable in a radial direction from the center of the work, an interlocking mechanism for synchronously moving the plurality of poles in the radial direction, and a fixing mechanism for fixing the plurality of poles at any position in the radial direction. The placement member is supported by a top plate, the interlocking mechanism is arranged on the lower surface side of the top plate so as to be movable up and down, and includes guide plates for guiding the plurality of poles in the radial direction respectively. The fixing mechanism includes a pressing portion arranged on the lower surface side of the guide plate and movable up and down, and a lifting mechanism for lifting and lowering the pressing portion. By raising the pressing portion by the lifting mechanism to raise the guide plate and sandwiching the protruding portions respectively provided at the lower portions of the plurality of poles between the top plate and the guide plate together, the positions of the plurality of poles are fixed.

Effects of the Invention

[0007] According to the work positioning jig according to the above aspect, by raising the pressing portion by the lifting mechanism to raise the guide plate and sandwiching the protruding portions respectively provided at the lower portions of the plurality of poles between the top plate and the guide plate together, the positions of the plurality of poles are fixed. Therefore, it is not necessary to perform the work of fixing each of the plurality of poles. Also, when moving the plurality of poles, by lowering the pressing portion by the lifting mechanism, the protruding portions are released together, and it is not necessary to perform the work of releasing each of the plurality of poles. For this reason, the working time for fixing the plurality of poles or making them movable can be shortened. As a result, the burden on the operator can be reduced, and the processing efficiency of the work can be improved.

[0008] In addition, in the work positioning jig according to the above aspect, a base plate is provided below and spaced apart from the guide plate. The lifting mechanism includes a shaft that extends upward from the base plate and is fixed, having a threaded portion on the outer periphery, a first gear that is screwed to the threaded portion and moves up and down by rotation, a second gear that meshes with the first gear and rotates the first gear by rotation, and an operation knob that rotates the second gear. The first gear may be configured to move the pressing portion up and down. According to this configuration, when the first gear rotates due to the rotation of the second gear, it moves up and down with respect to the shaft, and by moving the first gear up and down, the pressing portion can be easily moved up and down. That is, fixing of the pole or the like can be performed by a simple operation of operating the operation knob to rotate the second gear.

[0009] In addition, in the work positioning jig according to the above aspect, the shaft may be arranged below corresponding to the central portion. According to this configuration, since the first gear rotates about the lower part of the central portion of the work, when the first gear moves up, the pressing portion can be moved up in a balanced manner, and the protruding portions of the plurality of poles can be surely sandwiched. Also, in the work positioning jig according to the above aspect, the first gear may have a larger outer diameter and more teeth than the second gear. According to this configuration, since the rotation angle of the first gear is made smaller with respect to the rotation angle of the second gear, the rotation angle of the first gear can be adjusted accurately.

[0010] In addition, in the work positioning jig according to the above aspect, the first gear may be provided with an outer diameter that reaches below the position where the plurality of poles are farthest from the central portion. According to this configuration, when the first gear moves up, a force that moves up in a large range is applied to the pressing portion, so that the protruding portion can be more surely sandwiched. Also, in the work positioning jig according to the above aspect, the operation knob may be arranged outside the circular region surrounding the plurality of poles in a plan view. According to this configuration, even when a work is placed on the placement member, the operation knob can be operated to rotate the second gear. That is, the movement and fixing of the plurality of poles can be performed while the work is placed on the placement member.

[0011] Further, in the work positioning jig according to the above aspect, the interlocking mechanism includes a plurality of slider guide plates that respectively guide the sliders attached for each pole between the guide plate and the pressing portion. The plurality of slider guide plates are arranged in a stacked manner, and the guide plate is lifted through the plurality of slider guide plates by the lifting of the pressing portion, and the protruding portion may be sandwiched between the guide plate and the top plate. According to this configuration, the force for the pressing portion to rise can be transmitted to the guide plate by using the plurality of slider guide plates that are part of the interlocking mechanism. Further, in the work positioning jig according to the above aspect, the protruding portion may be an annular collar attached to the lower portion of the pole. According to this configuration, the pole can be easily fixed by sandwiching the collar between the top plate and the guide plate.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

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Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

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Figure 16

Figure 17

Best Mode for Carrying Out the Invention

[0013] Hereinafter, the embodiments will be described with reference to the drawings. However, the present invention is not limited to the content described below. Also, in the drawings, for the purpose of explaining the embodiments, the scale is appropriately changed such as enlarging or emphasizing a part, and the shape, dimensions, etc. may be different from the actual product. In FIG. 17, the directions in the figure will be described using the XYZ coordinate system. In this XYZ coordinate system, a plane parallel to the horizontal plane is defined as the XY plane. One direction in this XY plane is denoted as the X direction, and the direction orthogonal to the X direction is denoted as the Y direction. Also, the direction perpendicular to the XY plane is denoted as the Z direction. Each of the X direction, Y direction, and Z direction will be described assuming that the direction indicated by the arrow in the figure is the + direction and the direction opposite to the direction indicated by the arrow is the - direction.

[0014] FIG. 1 shows an example of a work positioning jig 100 according to an embodiment, and is a perspective view in a state where a part is cut away. FIG. 2 is an exploded perspective view of the work positioning jig 100 according to the embodiment. FIG. 3 is a plan view of the work positioning jig 100. In FIG. 2, the description of some members is omitted. As shown in FIGS. 1 and 2, the work positioning jig 100 includes a mounting member 10, a plurality of poles 20, a top plate 30, an interlocking mechanism 40, a fixing mechanism 50, and a base plate 60. The work positioning jig 100 positions the work W according to its inner diameter and outer diameter with respect to the disk-shaped work W stacked on the mounting member 10 by moving the plurality of poles 20 in the horizontal direction.

[0015] In the present embodiment, the work W is disk-shaped in plan view, but is not limited to this form. For example, the work W may be oval, elliptical, rectangular, etc. in plan view, or any other shape that can be stacked. The mounting member 10 is planar, and a plurality of works W are stacked on the upper surface side. The mounting member 10 is arranged at the uppermost stage among the plate-like bodies constituting the work positioning jig 100. That is, the mounting member 10 is arranged above the top plate 30. The mounting member 10 is arranged in a state of being placed on the top plate 30. That is, the mounting member 10 is movable upward with respect to the top plate 30.

[0016] As shown in FIG. 3, the mounting member 10 has three openings 11 and one opening 12. The opening 11 extends in the radial direction around the first axis AX1, and is provided along the path along which the pole 20 moves. The first axis AX1 passes through the central portion WO of the work W placed on the mounting member 10, and is an axis parallel to the vertical direction. The three openings 11 are provided at intervals of 120° around the axis of the first axis AX1. The opening 12 is circular around the second axis AX2. The opening 12 is used to penetrate an operation knob 56 described later. The opening 12 is arranged outside the circular region A surrounding the three poles 20 in plan view.

[0017] The plurality of poles 20 are arranged in a state of extending upward from the mounting member 10. Each pole 20 is arranged in a state of passing through each opening 11 of the mounting member 10. Therefore, when the mounting member 10 is moved in the vertical direction with respect to the top plate 30, the plurality of poles 20 function as guides for the mounting member 10. In the present embodiment, for example, three poles 20 are arranged, but the present invention is not limited to this form. For example, the number of poles 20 may be two, or may be four or more.

[0018] The three poles 20 are arranged at a predetermined interval, that is, at an interval of 120° around the axis of the first axis AX1 so as to surround the workpiece W placed on the mounting member 10. The three poles 20 are each movable in the radial direction centered on the first axis AX1 (the central portion WO of the workpiece W). The three poles 20 move in the radial direction in conjunction with each other. The movement of the pole 20 will be described later. By the three poles 20 coming into contact with the outer periphery of the workpiece W placed on the mounting member 10 respectively, the workpiece W is positioned.

[0019] The three poles 20 are each arranged so as to penetrate the mounting member 10 and the top plate 30. Each pole 20 is provided with a first collar 21 as a protruding portion at the lower part. The first collar 21 is provided in an annular shape and is attached to the lower part of the pole 20. The first collar 21 is in a state of being widened in the radial direction with respect to the pole 20. FIG. 4 is a perspective view showing the lower part of the pole 20. As shown in FIG. 4, in addition to the first collar 21, the lower part of the pole 20 is provided with a pin 21a and a second collar 21b.

[0020] The pin 21a is rod-shaped, penetrates the first collar 21, and is attached to the pole 20 by being inserted (or screwed) upward from the lower part of the pole 20. The second collar 21b is provided in a tubular shape so as to surround the portion of the pin 21a protruding downward from the first collar 21. The first collar 21 may be rotatable with respect to the pin 21a, or the rotation of the first collar 21 may be restricted with respect to the pin 21a. Similarly, the second collar 21b may be rotatable with respect to the pin 21a, or the rotation of the second collar 21b may be restricted with respect to the pin 21a.

[0021] A slider 22 is attached to the lower end of the pin 21a. The slider 22 is attached for each of the three poles 20. The slider 22 is a plate-like body extending in one direction. The lower end of the second collar 21b abuts on the upper surface of the slider 22. On the other hand, the upper end of the second collar 21b abuts on the lower surface of the first collar 21. That is, the vertical position of the first collar 21 is defined by being supported by the second collar 21b.

[0022] In the present embodiment, a form using the first collar 21 as the protruding portion of the pole 20 is described as an example, but it is not limited to this form. For example, a form in which the lower part of the pole 20 is formed with an enlarged diameter to form a protruding portion may be used. Further, the outer shape of the first collar 21 in plan view is not limited to a circular shape. For example, the outer shape of the first collar 21 in plan view may be an oval shape, an elliptical shape, a rectangular shape, or the like.

[0023] The slider 22 has a rectangular opening 22a formed along the longitudinal direction. A rack gear 22b is formed on one side along the longitudinal direction on the inner circumference of the opening 22a (see FIG. 7). This rack gear 22b meshes with a pinion gear 22c described later. The details of the slider 22 will be described later. The length L from the lower surface of the first collar 21 to the upper surface of the slider 22 is adjusted according to the position of the slider guide plate 42 corresponding to the slider 22. Among the slider guide plates 42, the length L is the shortest in the pole 20 using the slider 22 corresponding to the upper-position first slider guide plate 42A. Further, among the slider guide plates 42, the length L is the longest in the pole 20 using the slider 22 corresponding to the lower-position third slider guide plate 42C.

[0024] The top plate 30 is disposed below the placement member 10 and supports the placement member 10. FIG. 5 is a plan view showing an example of the top plate 30. As shown in FIG. 5, the top plate 30 has three openings 31 for moving the pole 20, one opening 32 for passing through an operation knob 56 described later, and three protrusions 33 for supporting the placement member 10. The top plate 30 is fixed by a connecting fitting or the like (not shown) so that the distance from the base plate 60 does not change. Further, the top plate 30 is restricted from rotating about the axis of the first axis AX1 with respect to the base plate 60 by a connecting fitting or the like.

[0025] The three openings 31 extend in the radial direction centered on the first axis AX1. The three openings 31 are arranged at intervals of 120° each about the axis of the first axis AX1. The three openings 31 coincide with the three openings 11 in a plan view. The opening 32 has a circular shape centered on the second axis AX2. The upper ends of the three protrusions 33 are in contact with the lower surface of the placement member 10. Therefore, a gap corresponding to the height of the protrusion 33 is formed between the placement member 10 and the top plate 30.

[0026] The interlocking mechanism 40 moves the three poles 20 synchronously in the radial direction. The interlocking mechanism 40 is disposed on the lower surface side of the top plate 30. The interlocking mechanism 40 is disposed so as to be able to move up and down in the axial direction of the first axis AX1. The interlocking mechanism 40 includes a guide plate 41 and three slider guide plates 42. The guide plate 41 is disposed below the top plate 30 and above the first slider guide plate 42A. The guide plate 41 guides the plurality of poles 20 in the radial direction respectively. FIG. 6 is a plan view showing an example of the guide plate 41.

[0027] As shown in FIG. 6, the guide plate 41 has an opening 43 into which the upper part of a pinion gear 22c described later is inserted, three openings 44 for guiding the pole 20, and a notch 45 for passing an operation knob 56 described later. The opening 43 is circular with the first axis AX1 as the center, and is used as a bearing for the upper part of the pinion gear 22c. The three openings 44 extend in the radial direction with the first axis AX1 as the center. The three openings 44 guide the respective poles 20 in the radial direction with the first axis AX1 as the center. The three openings 44 are arranged at intervals of 120° around the axis of the first axis AX1. The three openings 44 are arranged corresponding to the three openings 31 of the top plate 30 in a plan view.

[0028] The notch 45 is provided at three locations on the outer periphery of the guide plate 41 at intervals of 120° around the axis of the first axis AX1. As a result, the guide plate 41 is appropriately arranged even when it is rotated 120° around the axis of the first axis AX1. Note that the rotation of the guide plate 41 around the axis of the first axis AX1 is restricted with respect to the top plate 30 and the base plate 60. Also, a part of the first collar 21 attached to the pole 20 is sandwiched between the top plate 30 and the guide plate 41.

[0029] The three slider guide plates 42 are composed of a first slider guide plate 42A, a second slider guide plate 42B, and a third slider guide plate 42C in order from above. The three slider guide plates 42 guide the sliders 22 attached for each of the three poles 20 between the guide plate 41 and the pressing part 51. The three slider guide plates 42 are each plate-shaped. FIG. 7 is a plan view showing an example of the slider guide plate 42. As shown in FIG. 7, the slider guide plate 42 has openings 46 and 47 for guiding the slider 22, an opening 48 through which the second collar 21b of the pole 20 passes, and a notch 49 for passing an operation knob 56 described later.

[0030] The openings 46 and 47 are rectangular and extend continuously in one direction, and are formed on both sides of the first axis AX1 so as to include the first axis AX1. The openings 46 and 47 are formed in dimensions capable of accommodating the slider 22. The slider 22 is movable in the longitudinal direction of the openings 46 and 47. The openings 48 are arranged on both sides at intervals of 120° each around the axis of the first axis AX1 with respect to the opening 47. The openings 48 extend in the radial direction centered on the first axis AX1 and are provided corresponding to the region where the second collar 21b moves. The notches 49 are provided at three locations on the outer periphery of the slider guide plate 42 at intervals of 120° each around the axis of the first axis AX1.

[0031] With the slider 22 accommodated in the openings 46 and 47, the rack gear 22b of the slider 22 is in a meshed state with a pinion gear 22c described later. Therefore, by rotating the pinion gear 22c, the slider 22 can be moved in the longitudinal direction of the openings 46 and 47. Also, by moving the slider 22 in the longitudinal direction of the openings 46 and 47, the pinion gear 22c can be rotated.

[0032] The first slider guide plate 42A, the second slider guide plate 42B, and the third slider guide plate 42C are made of members having the same shape. By using members having the same shape as the three slider guide plates 42, the types of parts can be reduced. The first slider guide plate 42A, the second slider guide plate 42B, and the third slider guide plate 42C are stacked and arranged with their phases shifted by 120° each around the first axis AX1. That is, the sliders 22 on the three poles 20 are arranged with their phases shifted by 120° each in a plan view. Even if the first slider guide plate 42A etc. are shifted by 120° around the first axis AX1, the operation knob 56 can be properly passed through any one of the three notches 49.

[0033] By having the above-described configuration, when one pole 20 is moved in the radial direction, the other two poles 20 also move in the radial direction in conjunction. The interlocking of the three poles 20 is performed as follows. First, when one pole 20 is moved, the slider 22 attached to the lower part also moves accordingly. As the slider 22 moves, the pinion gear 22c that meshes with the rack gear 22b rotates. Due to the rotation of this pinion gear 22c, the sliders 22 in the other two poles 20 move. As a result, the three poles 20 move simultaneously and in the same direction.

[0034] In this embodiment, the form of using the above-described interlocking mechanism 40 is taken as an example for explanation, but it is not limited to this form. For example, instead of using the rack gear 22b and the pinion gear 22c, a form in which the three poles 20 are interlocked by a link mechanism or the like may be used as the interlocking mechanism 40.

[0035] The fixing mechanism 50 fixes the plurality of poles 20 at any position in the radial direction. The fixing mechanism 50 includes a pressing portion 51 and a lifting mechanism 52. FIG. 8 is an enlarged cross-sectional view of a part of the workpiece positioning jig 100 according to the embodiment. In FIG. 8, for the sake of explanation, the dimensions of each member are shown with changes. The pressing portion 51 is disposed below the interlocking mechanism 40. The pressing portion 51 is movable up and down in the axial direction of the first axis AX1. The pressing portion 51 includes a first pressing plate 57 and a second pressing plate 58. The first pressing plate 57 is disposed above the second pressing plate 58. The first pressing plate 57 and the second pressing plate 58 are disposed in a stacked state.

[0036] The first pressing plate 57 is disposed in contact with the lower surface of the third slider guide plate 42C of the interlocking mechanism 40. FIG. 9 is a plan view showing an example of the first pressing plate 57. As shown in FIG. 9, the first pressing plate 57 has an opening 71 through which the shaft 53 passes and into which the lower part of the pinion gear 22c is inserted, three openings 72, one opening 73 for passing through an operation knob 56 described later, and three openings 74. The rotation of the first pressing plate 57 is restricted about the axis of the first axis AX1 with respect to the top plate 30 and the base plate 60.

[0037] The opening 71 is circular with the first axis AX1 as the center. The lower part of the pinion gear 22c is inserted into the opening 71, and the opening 71 functions as a bearing on the lower side of the pinion gear 22c. The three openings 72 extend in the radial direction centered on the first axis AX1. The three openings 72 are arranged at intervals of 120° each about the axis of the first axis AX1. The opening 73 is circular with the second axis AX2 as the center. The three openings 74 extend in the radial direction centered on the first axis AX1. The three openings 74 are respectively arranged at intermediate positions about the axis of the first axis AX1 with respect to adjacent openings 72. The openings 72 and 74 are used, for example, as insertion holes for tools.

[0038] The second pressing plate 58 is in contact with the upper surface of the first gear 54 of the elevating mechanism 52. The second pressing plate 58 is disposed in a state of being placed on the first gear 54. FIG. 10 is a plan view showing an example of the second pressing plate 58. As shown in FIG. 10, the second pressing plate 58 has an opening 81 through which the shaft 53 passes, three openings 82, and three openings 84. The opening 81 has a shape in which a part of a circle centered on the first axis AX1 protrudes on both sides in the radial direction centered on the first axis AX1. The shaft 53 has a shape corresponding to the opening 81. The rotation of the second pressing plate 58 is restricted about the axis of the first axis AX1 with respect to the top plate 30 and the base plate 60 when the shaft 53 is inserted into the opening 81.

[0039] The three openings 82 extend in the radial direction centered on the first axis AX1. The three openings 82 are arranged at intervals of 120° each around the axis of the first axis AX1. The three openings 84 extend in the radial direction centered on the first axis AX1. The three openings 84 are arranged at intermediate positions around the axis of the first axis AX1 with respect to adjacent openings 82. The openings 82 and 84 are used, for example, as insertion holes for tools. In the present embodiment, a form in which two first pressing plates 57 and second pressing plates 58 are used as the pressing portion 51 is described as an example, but the present invention is not limited to this form. For example, a form in which one of the first pressing plate 57 and the second pressing plate 58 is used as the pressing portion 51 may be used.

[0040] The elevating mechanism 52 is disposed below the pressing portion 51. The elevating mechanism 52 elevates the pressing portion 51. The elevating mechanism 52 includes a shaft 53, a first gear 54, a second gear 55, and an operation knob 56. The shaft 53 is disposed along the first axis AX1 through the central portion WO of the workpiece W. The shaft 53 extends upward from the base plate 60 and is fixed, and rotation around the axis of the first axis AX1 with respect to the base plate 60 is restricted. The shaft 53 has a threaded portion 53a on the outer periphery.

[0041] FIG. 11 is a plan view showing an example of the first gear 54 and the second gear 55. As shown in FIG. 11, the first gear 54 is disposed in a state of being screwed to the threaded portion 53a. As a result, the first gear 54 rotates around the axis of the first axis AX1 and thereby elevates according to the amount of rotation. When the first gear 54 elevates, the above-described pressing portion 51 elevates. The shaft 53 has the above-described pinion gear 22c (see FIG. 7) rotatably attached to the upper end portion thereof. That is, the pinion gear 22c is rotatable around the axis of the first axis AX1 at the upper end of the shaft 53.

[0042] The second gear 55 is arranged to mesh with the first gear 54. The second gear 55 is rotatable about the axis of the second shaft AX2. The second gear 55 rotates the first gear 54 by rotating. The operation knob 56 extends upward from the second gear 55 and is provided integrally with the second gear 55. The operation knob 56 is provided with a length such that its upper end is exposed on the upper surface of the mounting member 10 (see FIGS. 1 and 3). Further, a hexagonal hole for inserting a tool such as a hexagonal wrench is provided at the upper end of the operation knob 56 (see FIG. 3). By inserting a hexagonal wrench into this hexagonal hole and rotating it, the operation knob 56 and the second gear 55 can be rotated about the axis of the second shaft AX2.

[0043] The shaft 53 is arranged below the position corresponding to the central portion WO. By arranging the shaft 53 below the position corresponding to the central portion WO of the workpiece W, the first gear 54 rotates about the axis below the central portion WO of the workpiece W. Therefore, when the first gear 54 ascends, the pressing portion 51 can be lifted in a balanced manner, and the first collar 21 of the three poles 20 can be reliably clamped. Further, the first gear 54 has a larger outer diameter and more teeth than the second gear 55. According to this configuration, since the rotation angle of the first gear 54 is smaller than the rotation angle of the second gear 55, the rotation angle of the first gear 54 can be adjusted accurately. That is, the lifting amount of the first gear 54 can be adjusted finely.

[0044] The first gear 54 is provided with an outer diameter such that a plurality of poles 20 reach below the position farthest from the central portion WO of the workpiece W. In this configuration, when the first gear 54 ascends, a force for ascending in a large range is applied to the pressing portion 51. Therefore, the first collar 21 can be clamped more reliably. Further, the operation knob 56 is arranged outside the circular region A surrounding the plurality of poles 20 in a plan view (see FIG. 3). According to this configuration, even when the workpiece W is placed on the mounting member 10, the operation knob 56 can be operated with a hexagonal wrench or the like to rotate the second gear 55. That is, the movement and fixing of the plurality of poles 20 can be performed in a state where the workpiece W is placed on the mounting member 10.

[0045] In this embodiment, as an example of the lifting mechanism 52, a form using the shaft 53, the first gear 54, and the second gear 55 is described, but it is not limited to this form. For example, a form in which a cam mechanism is operated by a lever or the like and the pressing portion 51 is lifted and lowered by this cam may be used. Further, the upper end of the operation knob 56 is exposed on the upper surface of the mounting member 10. Instead of this form, for example, a form in which the operation knob 56 is rotated by a tool from the side of the work positioning jig 100, or a form in which the operation knob 56 is rotated by a tool from the back side of the base plate 60 may be used.

[0046] The base plate 60 is disposed below and separated from the guide plate 41. As described above, the base plate 60 is held by a connecting fitting or the like so that the distance from the top plate 30 is constant. That is, while the distance between the top plate 30 and the base plate 60 is kept constant, the pressing portion 51 (the first pressing plate 57, the second pressing plate 58) and the first gear 54 of the lifting mechanism 52 move up and down therebetween.

[0047] The base plate 60 is flat. FIG. 12 is a plan view showing an example of the base plate 60. As shown in FIG. 12, the base plate 60 has openings 61 and 62. The opening 61 is provided in a rectangular shape including the first axis AX1. A rectangular protrusion provided at the lower part of the shaft 53 is inserted into the opening 61. As a result, the rotation of the shaft 53 around the axis of the first axis AX1 with respect to the base plate 60 is restricted. The opening 62 is circular with the second axis AX2 as the center. The lower part of the second gear 55 is inserted into the opening 62. The opening 62 functions as a bearing for the second gear 55.

[0048] Next, the usage state of the work positioning jig 100 according to the embodiment will be described. In a state where the first gear 54 of the lifting mechanism 52 is positioned downward (see FIG. 8), the space between the top plate 30 and the guide plate 41 is widened. Therefore, a gap is generated between the first collar 21 and the top plate 30 or between the first collar 21 and the guide plate 41, and the first collar 21 is movable. In this state, by moving one pole 20 radially until it contacts the outer periphery of the work W, the remaining two poles 20 also move radially to the position where they contact the outer periphery of the work W by the interlocking mechanism 40.

[0049] Subsequently, the fixing mechanism 50 fixes the radial positions of the three poles 20. Insert a hexagon wrench into the operation knob 56 from the upper surface side of the mounting member 10 and rotate the operation knob 56 by turning the hexagon wrench. When the operation knob 56 rotates, the second gear 55 rotates, and the first gear 54 meshing with the second gear 55 rotates according to the amount of rotation. When the first gear 54 rotates, the first gear 54 rises by the screw portion 53a of the shaft 53. When the first gear 54 rises, the pressing portion 51 (the first pressing plate 57 and the second pressing plate 58) also rises.

[0050] FIG. 13 is a diagram showing a force transmission path in the work positioning jig 100 according to the embodiment. As shown in FIG. 13, when the first gear 54 rises to raise the pressing portion 51, the pressing portion 51 also raises the three first slider guide plates 42A, the second slider guide plate 42B, and the third slider guide plate 42C. Pushed by the third slider guide plate 42C, the guide plate 41 is pushed upward. That is, the guide plate 41 rises with the rise of the first gear 54 via the first pressing plate 57, the second pressing plate 58, and the three first slider guide plates 42A, the second slider guide plate 42B, and the third slider guide plate 42C.

[0051] When the guide plate 41 is pushed upward, the space between the guide plate 41 and the top plate 30 becomes narrower. As a result, each first collar 21 of the three poles 20 is collectively sandwiched and fixed between the guide plate 41 and the top plate 30. In this state, the three poles 20 cannot move in the radial direction, and the three poles 20 are fixed in the radial direction.

[0052] Note that by sandwiching the first collar 21, a downward force acts on the first gear 54 via the guide plate 41, the first slider guide plate 42A, etc., and the pressing portion 51. However, since the first gear 54 is screw-coupled to the screw portion 53a of the shaft 53, it is difficult for the first gear 54 to rotate in the downward direction. That is, by maintaining the upward position due to the rotation of the first gear 54, the state where the first collar 21 is sandwiched between the guide plate 41 and the top plate 30 is maintained. As a result, the positions of the three poles 20 in the radial direction are maintained in a fixed state. In this way, the three poles 20 can be collectively fixed by a simple operation of operating the operation knob 56 to rotate the second gear 55.

[0053] Next, when moving the three poles 20, insert a hexagon wrench into the operation knob 56 and rotate the hexagon wrench in the opposite direction to the above to rotate the operation knob 56 in the opposite direction. By rotating the operation knob 56 in the opposite direction, the second gear 55 rotates in the opposite direction, and the first gear 54 that meshes with the second gear 55 rotates in the opposite direction according to the amount of rotation. When the first gear 54 rotates in the opposite direction, the first gear 54 descends due to the screw portion 53a of the shaft 53. When the first gear 54 descends, the guide plate 41 descends via the pressing portion 51, the first slider guide plate 42A, etc., and by expanding the space between the guide plate 41 and the top plate 30, the clamping of the first collar 21 is released.

[0054] As a result, each first color 21 becomes movable, and the three poles 20 can move in the radial direction. In this way, by a simple operation of operating the operation knob 56 to rotate the second gear 55 in the opposite direction, the three poles 20 can be collectively moved into a movable state. Therefore, it is possible to move the three poles 20 in the radial direction according to the outer diameter of the workpiece W placed on the placement member 10.

[0055] [Other Embodiments] FIG. 14 is an exploded perspective view showing a part of a workpiece positioning jig 100A according to another embodiment. FIG. 15 is an enlarged cross-sectional view showing a part of the workpiece positioning jig 100A according to another embodiment. In FIGS. 14 and 15, the same members as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified. The workpiece positioning jig 100A uses a lifting mechanism 152 instead of the above-described lifting mechanism 52. Since the lifting mechanism 152 is used, a second pressing plate 158, which is a partially modified form of the above-described second pressing plate 58, is used.

[0056] As shown in FIGS. 14 and 15, the second pressing plate 158 contacts the upper surface of the first gear 154 of the lifting mechanism 152 described later and is disposed in a state of being placed on the first gear 154, similar to the above-described second pressing plate 58. The second pressing plate 58 has an opening 181 through which the shaft 153 passes, three openings 82, and three openings 84. The second pressing plate 158 is disposed with the shaft 153 inserted into the opening 81 and is movable up and down along the shaft 153.

[0057] The lifting mechanism 152 is disposed below the second pressing plate 158 and raises and lowers the second pressing plate 158 (pressing portion 51). The lifting mechanism 152 includes a shaft 153, a first gear 154, a second gear 55, an operation knob 56, and an annular transmission member 159. The shaft 153 extends upward from the base plate 60 along the first axis AX1 and is fixed, and rotation about the axis of the first axis AX1 with respect to the base plate 60 is restricted. The shaft 153 has a threaded portion 153a on its outer periphery.

[0058] The first gear 154 is arranged at a distance from the second gear 55 and is screwed to the screw portion 153a. The first gear 154 rotates around the axis of the first shaft AX1 and moves up and down according to the amount of its rotation. When the first gear 154 moves up and down, the second pressing plate 158 (pressing portion 51) moves up and down. Note that the first gear 154 and the second gear 55 may have the same diameter or different diameters. For example, the diameter of the first gear 154 may be larger than the diameter of the second gear 55, or the diameter of the first gear 154 may be smaller than the diameter of the second gear 55. Also, the diameter of the first gear 154 is smaller than the diameter of the second pressing plate 158.

[0059] The annular transmission member 159 is spanned between the first gear 154 and the second gear 55. For the annular transmission member 159, for example, a chain, a belt, a wire, etc. are used, and members that mesh with the first gear 154 and the second gear 55 respectively are used. Therefore, the rotation of the second gear 55 is transmitted to the first gear 154 via the annular transmission member 159. Note that the amount of rotation of the first gear 154 with respect to the rotation of the second gear 55 is determined by the ratio of the diameters of the first gear 154 and the second gear 55.

[0060] The shaft 153 is arranged below corresponding to the central portion WO (see FIG. 3) in the same manner as the shaft 53 described above. Therefore, the first gear 154 rotates about the axis below the central portion WO of the workpiece W. For this reason, when the first gear 154 rises, the second pressing plate 158 can be raised in a balanced manner.

[0061] FIG. 16 is a diagram showing a force transmission path in the workpiece positioning jig 100A according to another embodiment. First, when the second gear 55 is rotated, the first gear 154 rotates via the annular transmission member 159. When the first gear 154 rotates, as shown in FIG. 16, the first gear 154 rises to raise the pressing portion 51, and the guide plate 41 rises via the three first slider guide plates 42A, the second slider guide plate 42B, and the third slider guide plate 42C. As a result, the space between the guide plate 41 and the top plate 30 becomes narrower, and each first collar 21 of the three poles 20 is collectively sandwiched and fixed between the guide plate 41 and the top plate 30.

[0062] By sandwiching the first color 21, a downward force acts on the first gear 154 via the guide plate 41, the first slider guide plate 42A, etc., and the pressing portion 51. However, since the first gear 154 is screw-coupled to the screw portion 153a of the shaft 153, the raised position is maintained. As a result, the state where the first color 21 is sandwiched between the guide plate 41 and the top plate 30 is maintained, and the positions of the three poles 20 in the radial direction are fixed.

[0063] Next, when moving the three poles 20, by rotating the operation knob 56 in the opposite direction, the second gear 55 is rotated in the opposite direction. This rotation is transmitted to the first gear 154 via the annular transmission member 159, and the first gear 154 is rotated in the opposite direction. As a result, the first gear 154 is lowered by the screw portion 153a of the shaft 153, and the guide plate 41 is lowered. By expanding the space between the guide plate 41 and the top plate 30, the clamping of the first color 21 is released, and the three poles 20 can be moved in the radial direction.

[0064] FIG. 17 is a diagram showing an example of a machine tool system 200 including a workpiece positioning jig 100 according to an embodiment. The machine tool system 200 shown in FIG. 17 includes a tool changer 101, a machine tool 102, and a loader device 104. The tool changer 101 holds an unprocessed workpiece W to be processed by the machine tool 102 and a processed workpiece W processed by the machine tool 102. The machine tool 102 is a machine for processing the workpiece W, such as a lathe. The loader device 104 conveys the workpiece W between the tool changer 101 and the machine tool 102. The loader device 104 supplies the unprocessed workpiece W from the tool changer 101 to the machine tool 102, or discharges the processed workpiece W processed by the machine tool 102 from the machine tool 102 to the tool changer 101.

[0065] The tray changer 101 has a plurality of the above-described work positioning jigs 100. The tray changer 101 has a drive mechanism 103 for moving the plurality of work positioning jigs 100. The drive mechanism 103 includes, for example, an endless belt 103A and a pulley 103B. The plurality of work positioning jigs 100 are attached at predetermined intervals over one circumference of the endless belt 103A.

[0066] The pulley 103B is rotated by a drive source (not shown) such as a motor. When the pulley 103B rotates, the endless belt 103A circulates, and the plurality of work positioning jigs 100 can be circulated. Accordingly, the work positioning jigs 100 sequentially move to the work transfer position P. The work transfer position P is set, for example, to be directly below a loader chuck (not shown) provided in the loader device 104.

[0067] When any one of the plurality of work positioning jigs 100 reaches the work transfer position P, the rotation of the pulley 103B is stopped. Further, the tray changer 101 has a lifting device (not shown) that grabs and lifts the placement member 10 (see FIG. 1 etc.) with respect to the work positioning jig 100 at the work transfer position P. By this lifting device, at the work transfer position P, the placement member 10 is lifted while the work W is placed thereon.

[0068] The loader chuck of the loader device 104 holds the uppermost workpiece W among the workpieces W stacked on the placement member 10 and conveys it to the machine tool 102. Further, the loader chuck of the loader device 104 holds and conveys the workpiece W processed by the machine tool 102 and places it on the placement member 10 of the workpiece positioning jig 100 at the workpiece transfer position P. Note that the workpiece W processed by the machine tool 102 may be conveyed using the loader device 104 to, for example, a product tray or the like installed separately from the tray changer 101, instead of returning it to the tray changer 101. In the machine tool system 200 shown in FIG. 17, a form using a plurality of workpiece positioning jigs 100 is described as an example, but a form in which some or all of the plurality of workpiece positioning jigs 100 are used in place of the above-described workpiece positioning jig 100A may also be used.

[0069] As described above, according to the workpiece positioning jigs 100 and 100A according to the present embodiment, the lifting mechanism 52 or 152 raises the pressing portion 51 to raise the guide plate 41, and the first collars 21 (protrusions) provided at the lower portions of the plurality of poles 20 are collectively sandwiched between the top plate 30 and the guide plate 41 to fix the positions of the plurality of poles 20. Therefore, it is not necessary to perform the operation of fixing each of the plurality of poles 20. Also, when moving the plurality of poles 20, the lifting mechanism 52 lowers the pressing portion 51 to collectively release the first collars 21 (protrusions), and it is not necessary to perform the operation of releasing each of the plurality of poles 20. For this reason, the operation time for fixing the plurality of poles 20 or making them movable can be shortened. As a result, the burden on the operator can be reduced, and the processing efficiency of the workpiece W can be improved.

[0070] As described above, the embodiments of the present invention have been explained. However, the technical scope of the present invention is not limited to the aspects described in the above embodiments and the like. It is obvious to those skilled in the art that various changes or improvements can be made to the above-described embodiments. Also, forms with such changes or improvements are included in the technical scope of the present invention. One or more of the requirements described in the above embodiments may be omitted. Also, the requirements described in the above embodiments can be combined as appropriate. Also, the execution order of each operation shown in the embodiments can be realized in any order as long as the results of the previous operation are not used in the subsequent operation. Also, regarding the operations in the above-described embodiments, even if they are described using "first", "next", "subsequently", etc. for convenience, it is not essential to carry out in this order.

[0071] In the above-described embodiment, an example has been given and explained in the form of positioning the work W by sandwiching the outer circumference (outer diameter) of the work W with three poles 20, but it is not limited to this form. For example, when the work W is annular, three poles 20 may be arranged inside the annular work W, and the work W may be positioned by moving each pole 20 outward and bringing it into contact with the inner circumference (inner diameter) of the work W.

Explanation of Reference Numerals

[0072] AX1 ··· First axis AX2 ··· Second axis W ··· Work WO ··· Central part 10 ··· Mounting member 20 ··· Pole 21 ··· First collar (protrusion) 22 ··· Slider 30 ··· Top plate 40 ··· Interlocking mechanism 41 ··· Guide plate 42 ··· Slider guide plate 50 ··· Fixing mechanism 51 ··· Pressing part 52, 152 ··· Lifting mechanism 53, 153 ··· Shaft 53a, 153a... screw part 54, 154... first gear 55... second gear 56... operation knob 60... base plate 100, 100A... workpiece positioning jig

Claims

1. A placement member on which workpieces are stacked, a plurality of poles arranged at a predetermined interval so as to surround the workpieces placed on the placement member while extending upward from the placement member, and each movable in the radial direction from the central portion of the workpieces, an interlocking mechanism for synchronously moving the plurality of poles in the radial direction, a fixing mechanism for fixing the plurality of poles at any position in the radial direction, and comprising: the placement member is supported by a top plate, the interlocking mechanism is arranged to be movable up and down on the lower surface side of the top plate, and includes a guide plate for guiding the plurality of poles in the radial direction respectively, the fixing mechanism includes a pressing portion arranged on the lower surface side of the guide plate and movable up and down, and a lifting mechanism for lifting and lowering the pressing portion, a workpiece positioning jig that fixes the positions of the plurality of poles by raising the pressing portion by the lifting mechanism to raise the guide plate, and sandwiching the protruding portions provided at the lower portions of the plurality of poles together between the top plate and the guide plate.

2. a base plate is provided below and spaced apart from the guide plate, the lifting mechanism includes a shaft extending upward from the base plate and fixed, having a threaded portion on the outer periphery, a first gear that is threadedly coupled to the threaded portion and moves up and down by rotation, a second gear that meshes with the first gear and rotates the first gear by rotation, and an operation knob for rotating the second gear, the first gear raises and lowers the pressing portion, the workpiece positioning jig according to Claim 1.

3. the shaft is arranged below corresponding to the central portion, the workpiece positioning jig according to Claim 2.

4. the first gear has a larger outer diameter and more teeth than the second gear, the workpiece positioning jig according to Claim 3.

5. the first gear is provided with an outer diameter that reaches below the position where the plurality of poles are farthest from the central portion, the workpiece positioning jig according to Claim 4.

6. the operation knob is arranged outside a circular region surrounding the plurality of poles in a plan view, the workpiece positioning jig according to Claim 2.

7. the interlocking mechanism includes a plurality of slider guide plates for guiding the sliders attached to each of the poles between the guide plate and the pressing portion, the plurality of slider guide plates are arranged in a stacked manner, The work positioning jig according to claim 1, wherein when the pressing portion rises, the guide plate rises via the plurality of slider guide plates, and the protruding portion is sandwiched between the guide plate and the top plate.

8. The work positioning jig according to claim 1, wherein the protruding portion is an annular collar attached to the lower portion of the pole.

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