JP3687892B2 - Work positioning jig - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a workpiece positioning jig, and more particularly, to a workpiece positioning jig suitable for positioning a large workpiece placed on a conveyance pallet at a predetermined position.
[0002]
[Prior art]
In an assembly line such as an engine, a large work such as an engine block is usually positioned and placed at a predetermined position on a transport pallet. In addition, a dedicated positioning support device for positioning and supporting a workpiece in this type of large workpiece machining line is also known (see Japanese Utility Model Publication No. 59-136241).
[0003]
When positioning a work on the conveyance pallet, a pair of reference holes are provided on the lower surface of the work, and a pair of knock pins that can be fitted into the reference holes of the work are provided on the conveyance pallet. The knock pin is detachably screwed into a screw hole opened on the upper surface of the transport pallet so that other workpieces having different reference hole positions and pitches can be positioned. When positioning another workpiece with a different reference hole position or pitch, a pair of screw holes corresponding to the reference hole is added on the transport pallet, and the pair of dowel pins are replaced with the added screw holes. Screwed together. This new screw hole is added every time a new workpiece with a different reference hole position and pitch appears.
[0004]
On the other hand, a workpiece positioning support apparatus described in Japanese Utility Model Laid-Open No. 59-136241 includes a pair of rotating shafts configured such that the distance between the axes can be adjusted. A knock pin that can be fitted into the reference hole is provided eccentrically. In order to position the workpiece on the positioning support device, the distance between the pair of rotating shafts is adjusted, and each rotating shaft is adjusted to a predetermined rotational position so that the pair of knock pins are aligned with the reference hole of the workpiece. Let
[0005]
[Problems to be solved by the invention]
By the way, in the transport pallet described above, it is necessary to add a new pair of screw holes on the transport pallet each time a new workpiece appears, and to replace the pair of dowel pins into the screw holes for screwing. There is a problem that it takes a lot of work man-hours to increase the number of pins and replace the knock pins. In addition, new screw holes can be added only at positions that do not overlap with existing screw holes. Depending on the position and pitch of the reference holes of newly introduced workpieces, additional screw holes corresponding to the reference holes can be added. Sometimes it becomes impossible to position the workpiece.
[0006]
On the other hand, in the workpiece positioning support apparatus described in Japanese Utility Model Laid-Open No. 59-136241, it is not necessary to add a new screw hole or replace a reference pin. However, the range in which the position of the pair of knock pins can be adjusted is limited to the length determined according to the distance between the pair of rotation shafts and the width corresponding to the diameter of the rotation circle of each knock pin. The range is extremely narrow. For this reason, there is a problem in that a new workpiece having a greatly different reference hole position cannot be positioned, and its application range is narrow.
[0007]
Accordingly, an object of the present invention is to provide a workpiece positioning jig capable of adjusting the position of a knock pin over a wide range by a simple operation and positioning a large number of workpieces having different reference hole positions and pitches.
[0008]
[Means for Solving the Problems]
As a means to solve the aforementioned problems, Book A workpiece positioning jig according to the invention is a workpiece positioning jig having a knock pin that can be fitted into a reference hole of a workpiece, and a circumferential direction and a radial direction of concentric circles centering on a central axis parallel to the axis of the knock pin And a position adjusting mechanism that movably supports the knock pin, and a lock mechanism that locks the position adjusting mechanism and fixes the knock pin at a desired moving position.
[0009]
Book In the workpiece positioning jig according to the invention, when the lock mechanism releases the locked state of the position adjustment mechanism, the position adjustment mechanism moves the knock pin along a circumferential direction and a radial direction of a concentric circle centering on a central axis parallel to the axis. And movably support. For this reason, the position of the knock pin can be adjusted to a desired position within the moving range. When the lock mechanism locks the position adjustment mechanism, the knock pin is fixed at a desired position within the movement range.
[0010]
Also, Book The workpiece positioning jig according to the invention is: Book The position adjustment mechanism in the invention includes a rotating ring member rotatably supported inside a ring-shaped mounting base member, a rotating shaft member rotatably supported inside the rotating ring member, and the rotation From shaft member The rotating ring member An arm member protruding in the radial direction, a first link member having one end pivotally attached to the tip of the arm member, one end pivotally attached to the rotating ring member, and the other end being A second link member pivotally attached to the other end of the first link member, and the second link member Said On the pivot point with the first link member or On the second link member or on the first link member The knock pin is arranged on the surface.
[0011]
Book In the workpiece positioning jig according to the invention, when the locking mechanism releases the locked state of the position adjusting mechanism, the rotating ring member and the rotating shaft member of the position adjusting mechanism can be rotated with respect to the mounting base member, respectively. Relative rotation is possible. Then, the rotation ring member and the rotation shaft member rotate in the same direction with respect to the mounting base member, so that the position adjustment mechanism causes the knock pin to move to the rotation shaft member via the arm member, the first link member, and the second link member. It is supported so as to be movable along the circumferential direction of a concentric circle centering on the axis. Further, when the rotating ring member and the rotating shaft member rotate relative to each other, the position adjusting mechanism causes the knock pin via the arm member, the first link member, and the second link member to have a concentric radius about the axis of the rotating shaft member. Support movable along the direction. For this reason, the position of the knock pin can be adjusted to a desired position within the moving range. When the locking mechanism locks the position adjusting mechanism, the rotating ring member and the rotating shaft member cannot rotate with respect to the mounting base member, so that the knock pin is fixed at a desired position within the moving range.
[0012]
further, Book The workpiece positioning jig according to the invention is: Book A lock mechanism capable of locking the position adjustment mechanism in the invention is provided for the rotating ring member. This rotating ring member The mounting base member in an integrally engaged state in the rotational direction of Said It is interposed between the rotary shaft members so that it can move up and down. Taku Hold the wedge member and this wedge member Said Mounting base member and Said Interposed between the rotary shaft member and vertically movable, and Said A holder member biased downward relative to the mounting base member. When the holder member is biased downward with respect to the mounting base member, the wedge member presses against the rotating shaft member and locks the rotating shaft member so as not to rotate with respect to the mounting base member. It is characterized by doing.
[0013]
Book In the workpiece positioning jig according to the invention, since the holder member of the lock mechanism is normally biased downward with respect to the mounting base member, the wedge member moves downward to lock the rotating shaft member to the mounting base member. Thus, it is impossible to rotate, and the rotating ring member is engaged in the rotational direction so that it cannot be rotated, and the lock mechanism holds the position adjusting mechanism in the locked state. When the holder member is pushed upward with respect to the mounting base member, the wedge member moves upward to make the rotating shaft member and the rotating ring member rotatable, and the lock mechanism is in a locked state of the position adjusting mechanism. Is released.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a workpiece positioning jig according to the present invention will be described with reference to the drawings. In the drawings to be referred to, FIG. 1 is a plan view of a transport pallet provided with a workpiece positioning jig according to an embodiment, and FIG. 2 is a side view of the transport pallet provided with a work positioning jig according to an embodiment. 3 is a perspective view showing a position adjusting mechanism of a workpiece positioning jig according to one embodiment, FIG. 4 is a plan view showing a position adjusting mechanism of a workpiece positioning jig according to one embodiment, and FIG. 5 is a workpiece according to one embodiment. FIG. 6 is a bottom view showing the lock mechanism of the workpiece positioning jig according to the embodiment, and FIG. 7 is an exploded view of the workpiece positioning jig according to the embodiment. It is a perspective view.
[0015]
As shown in FIGS. 1 and 2, a workpiece positioning jig 1 according to an embodiment is a jig for positioning a relatively large workpiece W such as an engine mounted on a conveyance pallet P. It has a mounting base member 2 that can be fixed on P, and a knock pin 3 that protrudes upward so that it can be fitted into a reference hole H (see FIG. 2) of the workpiece W. A pair is installed.
[0016]
The workpiece positioning jig 1 includes a position adjusting mechanism 4 (see FIGS. 3 to 5) that supports the knock pin 3 movably along a circumferential direction and a radial direction of concentric circles centering on a central axis parallel to the axis of the knock pin 3. See). The workpiece positioning jig 1 also includes a lock mechanism 5 (see FIGS. 5 and 6) that locks the position adjustment mechanism 4 and fixes the knock pin 3 at a desired movement position.
[0017]
As shown in FIGS. 3 to 5, the position adjustment mechanism 4 is formed in a ring shape and is rotatably supported inside the mounting base member 2, and rotates inside the rotating ring member 6. A rotary shaft member 7 that is freely supported, an arm member 8 that projects from the rotary shaft member 7 in the radial direction thereof, and a first link member 9 having one end pivotally attached to the tip of the arm member 8. And a second link member 10 having one end pivotally attached to the rotating ring member 6 and the other end pivotally attached to the other end of the first link member 9. The knock pin 3 is disposed on the pivot point between the second link member 10 and the first link member 9.
[0018]
Further, as shown in FIGS. 5 and 6, the locking mechanism 5 is vertically moved between the mounting base member 2 and the rotating shaft member 7 in a state of being integrally engaged with the rotating ring member 6 in the rotating direction. A wedge member 11 that is movably disposed and locks the rotation shaft member 7 to the attachment base member 2 by the downward movement thereof, and makes the rotation impossible, and the attachment base member 2 and the rotation shaft member 7 that hold the wedge member 11. And a holder member 12 that is urged downward with respect to the mounting base member 2.
[0019]
As shown in FIGS. 5 and 7, the mounting base member 2 has a ring shape that is fitted into the mounting hole P <b> 1 of the transport pallet P. A flange 2A that is fixed to the upper surface of the transport pallet P via a bolt B1 and positioned in the circumferential direction via a knock pin K1 is formed on the upper outer periphery of the mounting base member 2. Further, a ring protrusion 2B is formed on the upper inner periphery of the mounting base member 2 so as to rotatably support the rotating ring member 6 and to restrict the vertical movement thereof. Further, a pair of engaging pieces 2C for restricting the rotation of the holder member 12 are provided on the lower surface of the mounting base member 2 so as to face each other in the diameter direction (see FIG. 6). The mounting base member 2 is formed with a plurality of receiving holes 2D that are open on the lower surface of the mounting base member 2 so as to be evenly arranged in the circumferential direction. Coil springs 14 for pressing 12 downward are accommodated.
[0020]
The knock pin 3 has a flange 3A integrally formed at the lower end thereof, and is fixed to the upper surface of the other end of the second link member 10 via a bolt B2, whereby the other end of the second link member 10 is fixed. Projecting above. The knock pin 3 is integrally formed with a pivot pin 3B that protrudes downward from the flange 3A on the same axis. And the other end part of the 1st link member 9 is pivotally attached below the other end part of the 2nd link member 10 via this pivot pin 3B.
[0021]
The rotating ring member 6 is rotatably supported by the ring protrusion 2B of the mounting base member 2 via a sliding collar 15 and a sliding ring 16, and the vertical axial movement is restricted. The sliding collar 15 is formed in an L-shaped cross section that is integrally formed with the rotating ring member 6 and has an upper surface that abuts on the flange portion 6A that projects upward from the mounting base member 2, and has an upper surface and an inner periphery of the ring protrusion 2B. It is in sliding contact with the surface. Further, the lower surface of the sliding ring 16 is supported by a stop ring 17 mounted on the outer peripheral surface of the rotating ring member 6, and is in sliding contact with the lower surface of the sliding collar 15 and the lower surface of the ring protrusion 2B.
[0022]
Since the wedge member 11 is fitted into the lower portion of the rotating ring member 6 and integrally engaged in the rotational direction, engaging slits 6B extending upward from the lower end thereof are formed at three equal intervals in the circumferential direction. (See FIG. 6). Further, an engagement step portion 6 </ b> C for restricting the upward axial movement of the rotary shaft member 7 is formed on the inner periphery of the rotary ring member 6. Further, a flange 18A integrally formed with the pivot pin 18 is fixed to the upper surface of the flange portion 6A of the rotating ring member 6 via a bolt B3. And the one end part of the 2nd link member 10 is pivoted above the collar part 6A via the pivot pin 18 which protrudes above the collar part 6A.
[0023]
The rotating shaft member 7 is rotatably supported on the inner periphery of the rotating ring member 6 via a bush 19. The base end portion of the arm member 8 is fixed to the upper end of the rotating shaft member 7 via a bolt B4 and a knock pin K2. In addition, a tapered cone 7A is formed at the lower portion of the rotating shaft member 7 and the lower diameter is increased with a gradient of about 10 degrees. Above the taper cone 7A, an engaging step 7B is formed that abuts the step 6C of the rotating ring member 6 via the sliding ring 20. The rotary shaft member 7 has an axial direction in the vertical direction by a sliding ring 21 interposed between the lower surface of the arm member 8 fixed to the upper end of the rotary shaft member 7 and the upper end surface of the rotary ring member 6. Movement is restricted. A disk-shaped upper cap 22 is fixed on the base end portion of the arm member 8 via a bolt B5, and a stepped disk-shaped lower cap 23 is formed on the lower end of the rotary shaft member 7. It is fixed via a long bolt 24 that passes through the center of the rotary shaft member 7.
[0024]
The arm member 8 is set to a relatively short length such that the tip of the arm member 8 faces the outer periphery of the flange portion 6A of the rotating ring member 6. And the flange 25A formed integrally with the pivot pin 25 is being fixed to the upper surface of the front-end | tip part of this arm member 8 via the volt | bolt B6. One end portion of the first link member 9 is pivotally attached to the distal end portion of the arm member 8 via a pivot pin 25 that protrudes downward from the distal end portion of the arm member 8.
[0025]
As shown in FIG. 4, the first link member 9 and the second link member 10 are arranged along the flange portion 6 </ b> A so that the knock pin 3 can be positioned above the flange portion 6 </ b> A of the rotating ring member 6. It is formed in a curved planar shape (see FIG. 7).
[0026]
As shown in FIG. 7, the wedge member 11 constituting the lock mechanism 5 has a vertically long block shape. As shown in FIG. 5, the wedge member 11 has an inner surface facing the rotating shaft member 7 formed on an inclined surface having a reverse gradient that can be in close contact with the tapered cone 7 </ b> A. The wedge member 11 is fitted in each engagement slit 6B formed in the lower part of the rotating ring member 6, and is integrally engaged with the rotating ring member 6 in the circumferential direction thereof. It is movable by a predetermined amount in the radial direction.
[0027]
Further, as shown in FIGS. 5 and 7, the holder member 12 is slidably fitted to the inner periphery of the mounting base member 2 and slidably contacts the outer surface of each wedge member 11. Is formed. A flange portion 12A is formed on the outer periphery of the lower end portion of the holder member 12 so as to project downward from the attachment base member 2. The flange portion 12A has a pair of engagement members protruding from the lower surface of the attachment base member 2. A pair of engagement slits 12 </ b> B that engage with the combined piece 2 </ b> C and restrict the rotation of the holder member 12 are formed. Further, on the inner periphery of the upper end portion of the holder member 12, a ring protrusion 12 </ b> C that locks the upper end of each wedge member 11 is formed. Furthermore, a stop ring 27 that locks the lower end of each wedge member 11 via a sliding ring 26 is attached to the inner periphery of the holder member 12.
[0028]
The holder member 12 is movable in the vertical axial direction by a predetermined amount with respect to the mounting base member 2 and the rotary shaft member 7 together with the wedge members 11. The holder member 12 is configured such that each wedge member 11 is normally moved to the rotating shaft member 7 by the flange portion 12A being biased downward via the pusher 13 by the coil springs 14 built in the mounting base member 2. The rotary shaft member 7 is locked so as not to rotate by being brought into pressure contact with the inner circumference of the taper cone 7A and the holder member 12. When the holder member 12 is pushed upward against the urging force of each coil spring 14, the wedge member 11 is released from the tapered cone 7A to release the locked state, and the rotary shaft member 7 is It is configured to be rotatable.
[0029]
For example, as shown in FIG. 1, a pair of workpiece positioning jigs 1 according to the embodiment configured as described above are installed and used before and after a transport pallet P. In this case, as shown in FIG. 5, each workpiece positioning jig 1 is fitted with the mounting base member 2 in the mounting hole P1 of the transport pallet P, and the flange 2A is connected to the upper surface of the transport pallet P with the bolt B1 and the knock pin K1. Secure through.
[0030]
In each workpiece positioning jig 1 installed on the transport pallet P, the holder member 12 of the lock mechanism 5 is usually attached downward to the mounting base member 2 by each coil spring 14 built in the mounting base member 2. Therefore, each wedge member 11 moves downward together with the holder member 12 with respect to the mounting base member 2 and the rotary shaft member 7. Each wedge member 11 locks the rotation shaft member 7 against the mounting base member 2 so as to be non-rotatable by being in pressure contact with the tapered cone 7A of the rotation shaft member 7 and the inner periphery of the holder member 12. At the same time, each wedge member 11 engages with each engagement slit 6B of the rotating ring member 6 to lock the rotating ring member 6 so as not to rotate. Thus, the lock mechanism 5 holds the position adjustment mechanism 4 in the locked state.
[0031]
Therefore, when adjusting the position of the knock pin 3 of each workpiece positioning jig 1 so as to match the reference holes H of the workpiece W placed on the transport pallet P, first, the position adjusting mechanism of each workpiece positioning jig 1 is used. 4 is released. That is, the holder member 12 of each lock mechanism 5 is pushed upward. This pushing operation is performed by a pair of jack cylinders J installed below the transport pallet P as shown in FIG. That is, the ring-shaped pushing member J1 fixed to the tip of each jack cylinder J is positioned below the holder member 12, and in this state, the pair of jack cylinders J are extended by a predetermined amount. The drive type of the jack cylinder J may be any drive type such as manual type, pneumatic type, hydraulic type, and electric type.
[0032]
When the holder member 12 is pushed upward by a predetermined amount by the jack cylinder J, each wedge member 11 moves together with the holder member 12 by a predetermined amount with respect to the mounting base member 2 and the rotary shaft member 7. And each wedge member 11 cancels | releases the locked state of the rotating shaft member 7 with respect to the attachment base member 2, and makes the rotating shaft member 7 rotate freely. Moreover, each wedge member 11 makes the rotating ring member 6 rotatable, and follows the rotation. Thus, the lock mechanism 5 releases the locked state of the position adjustment mechanism 4.
[0033]
In the position adjusting mechanism 4 in which the locked state is released, the rotating ring member 6 and the rotating shaft member 7 are rotatable with respect to the mounting base member 2 and are relatively rotatable with respect to each other. Then, the rotation adjustment member 4 rotates via the arm member 8, the first link member 9, and the second link member 10 by the rotation ring member 6 and the rotation shaft member 7 rotating in the same direction with respect to the mounting base member 2. The knock pin 3 is supported so as to be movable along a concentric circle centered on the axis of the rotary shaft member 7, that is, a concentric circle parallel to the transport pallet P. Further, when the rotating ring member 6 and the rotating shaft member 7 are relatively rotated, the position adjusting mechanism 4 causes the knock pin 3 of the rotating shaft member 7 to be moved via the arm member 8, the first link member 9 and the second link member 10. A concentric circle centered on the axis, that is, a concentric circle parallel to the transport pallet P is supported so as to be movable along the radial direction.
[0034]
Therefore, the knock pins 3 of the pair of workpiece positioning jigs 1 are moved to desired positions within the moving range so as to match the reference holes H, H of the workpiece W placed on the transport pallet P. The movement operation of the pair of knock pins 3 can be performed manually using an appropriate jig, but can be accurately performed using, for example, a robot hand.
[0035]
Subsequently, the pair of jack cylinders J is contracted downward while the pair of knock pins 3 are held at desired positions. By this operation, in each workpiece positioning jig 1, the wedge member 11 moves downward relative to the mounting base member 2 and the rotating shaft member 7 together with the holder member 12 biased downward. The wedge member 11 locks the rotating shaft member 7 to the mounting base member 2 to make it non-rotatable, and engages in the rotation direction of the rotating ring member 6 to make the rotating ring member 6 unrotatable. Thus, the lock mechanism 5 of each workpiece positioning jig 1 holds the position adjusting mechanism 4 in the locked state again. As a result, the rotating ring member 6 and the rotating shaft member 7 of each workpiece positioning jig 1 are attached to the mounting base member 2. And the pair of knock pins 3 are fixed at desired positions within the movement range.
[0036]
As described above, in the work positioning jig 1 according to the embodiment, the lock mechanism 5 releases the locked state of the position adjustment mechanism 4 so that the knock pin 3 can be adjusted to a desired position within the moving range. When the lock mechanism 5 brings the position adjustment mechanism 4 into the locked state, the knock pin 3 is fixed at a desired position within the moving range. Therefore, according to the pair of front and rear workpiece positioning jigs 1 installed on the conveyance pallet P, a large number of workpieces W having different positions and pitches of the reference holes H and H are positioned at desired positions on the same conveyance pallet P. be able to.
[0037]
Further, in the workpiece positioning jig 1 according to one embodiment, the holder member 12 of the lock mechanism 5 is pushed upward with respect to the mounting base member 2, and the pushing operation is released by an extremely simple operation. Since the position adjustment mechanism 4 can be unlocked and the position adjustment mechanism 4 can be held in the locked state again, the position adjustment operation of the knock pin 3 can be easily performed. In addition, since the position adjustment mechanism 4 is composed of a rotation link mechanism including the attachment base member 2, the rotation ring member 6, the rotation shaft member 7, the arm member 8, the first link member 9, and the second link member 10, The position adjusting operation of the knock pin 3 can be performed quickly.
[0038]
In the workpiece positioning jig 1 according to the embodiment, the knock pin 3 is disposed on the pivot point between the first link member 9 and the second link member 10 constituting the position adjusting mechanism 4. Further, it may be installed on the second link member 10 or the first link member 9 in the vicinity of the pivot point.
[0039]
Further, the gradient of the taper cone 7A and each wedge member 11 constituting the lock mechanism 5 increases the downward urging force acting on each wedge member 11 by 5.6 times in the radial direction of the taper cone 7A and the holder member 12. In order to make it act, it was set to about 10 degrees, but this gradient can be appropriately changed according to the urging force of the coil spring 14 that urges the holder member 12 downward.
[0040]
A pair of workpiece positioning jigs 1 according to one embodiment are not necessarily installed on the transport pallet P. For example, when a knock pin corresponding to one of the reference holes H, H of the workpiece W placed on the transport pallet P is projected at a predetermined position on the transport pallet P, the reference holes H, H By installing the single workpiece positioning jig 1 corresponding to the other on the transport pallet P, it is possible to position the workpieces W with different positions and pitches of the reference holes H, H on the same transport pallet P. is there.
[0041]
In addition, the workpiece positioning jig 1 of one embodiment is not necessarily installed on the transport pallet P, and can be installed on an appropriate mounting table on which the workpiece W is mounted.
[0042]
【The invention's effect】
As explained above, Book In the workpiece positioning jig according to the invention, when the lock mechanism releases the locked state of the position adjustment mechanism, the position adjustment mechanism moves the knock pin along a circumferential direction and a radial direction of a concentric circle centering on a central axis parallel to the axis. And movably support. For this reason, the position of the knock pin can be adjusted to a desired position within the moving range. When the lock mechanism locks the position adjustment mechanism, the knock pin is fixed at a desired position within the movement range. Therefore, Book According to the workpiece positioning jig according to the invention, it is possible to position a large number of workpieces having different reference hole positions and different pitches.
[0043]
Book In the workpiece positioning jig according to the invention, when the locking mechanism releases the locked state of the position adjusting mechanism, the rotating ring member and the rotating shaft member of the position adjusting mechanism can be rotated with respect to the mounting base member, respectively. Relative rotation is possible. Then, the rotation ring member and the rotation shaft member rotate in the same direction with respect to the mounting base member, so that the position adjustment mechanism causes the knock pin to move to the rotation shaft member via the arm member, the first link member, and the second link member. It is supported so as to be movable along the circumferential direction of a concentric circle centering on the axis. Further, when the rotating ring member and the rotating shaft member rotate relative to each other, the position adjusting mechanism causes the knock pin via the arm member, the first link member, and the second link member to have a concentric radius about the axis of the rotating shaft member. Support movable along the direction. For this reason, the position of the knock pin can be adjusted to a desired position within the moving range. When the locking mechanism locks the position adjusting mechanism, the rotating ring member and the rotating shaft member cannot rotate with respect to the mounting base member, so that the knock pin is fixed at a desired position within the moving range. Therefore, Book According to the workpiece positioning jig according to the invention, it is possible to position a large number of workpieces having different reference hole positions and different pitches. In addition, since the position adjusting mechanism is composed of a rotating link mechanism comprising a mounting base member, a rotating ring member, a rotating shaft member, an arm member, a first link member and a second link member, the position adjustment operation of the knock pin can be performed quickly. Can be done.
[0044]
Book In the workpiece positioning jig according to the invention, since the holder member of the lock mechanism is normally biased downward with respect to the mounting base member, the wedge member moves downward to lock the rotating shaft member to the mounting base member. Thus, it is impossible to rotate, and the rotating ring member is engaged in the rotational direction so that it cannot be rotated, and the lock mechanism holds the position adjusting mechanism in the locked state. When the holder member is pushed upward with respect to the mounting base member, the wedge member moves upward to make the rotating shaft member and the rotating ring member rotatable, and the lock mechanism is in a locked state of the position adjusting mechanism. Is released. That is, Book According to the workpiece positioning jig according to the invention, the holder member is pushed upward with respect to the mounting base member, and the locked state of the position adjusting mechanism is released by an extremely simple operation of releasing the pushing operation. In addition, since the position adjusting mechanism can be held in the locked state again, the position adjustment operation of the knock pin can be easily performed.
[Brief description of the drawings]
FIG. 1 is a plan view of a transport pallet provided with a workpiece positioning jig according to an embodiment of the present invention.
FIG. 2 is a side view of a transport pallet on which a workpiece positioning jig according to an embodiment is installed.
FIG. 3 is a perspective view showing a position adjustment mechanism of a workpiece positioning jig according to an embodiment.
FIG. 4 is a plan view showing a position adjusting mechanism of the workpiece positioning jig according to one embodiment.
FIG. 5 is a longitudinal sectional view showing a position adjusting mechanism and a lock mechanism of a workpiece positioning jig according to an embodiment.
FIG. 6 is a bottom view showing a lock mechanism of a workpiece positioning jig according to an embodiment.
FIG. 7 is an exploded perspective view of a workpiece positioning jig according to an embodiment.
[Explanation of symbols]
1: Work positioning jig
2: Mounting base member
3: Knock pin
4: Position adjustment mechanism
5: Lock mechanism
6: Rotating ring member
7: Rotating shaft member
8: Arm member
9: First link member
10: Second link member
11: Wedge member
12: Holder member

Claims (4)

A workpiece positioning jig having a knock pin that can be fitted into a reference hole of a workpiece, and supports the knock pin so as to be movable along a circumferential direction and a radial direction of a concentric circle centering on a central axis parallel to the axis of the knock pin. A position adjusting mechanism that locks the position adjusting mechanism to fix the knock pin at a desired movement position ,
The position adjustment mechanism includes a rotating ring member rotatably supported inside a ring-shaped mounting base member;
A rotating shaft member which is rotatably supported inside the rotary ring member,
An arm member which projects in a radial direction of said rotary ring member from said rotating shaft member,
A first link member having one end pivotally attached to the tip of the arm member;
A second link member having one end pivotally attached to the rotary ring member and the other end pivotally attached to the other end of the first link member;
Work positioning jig, characterized in that the knock pin is disposed on the second link member and the first link member and the pivot point or on the second link member or on the first link member on. The workpiece positioning jig according to claim 1 ,
Wherein the position adjusting mechanism can be locked a locking mechanism, it can move up and down between the mounting base member and the rotary shaft member in a rotational direction in engagement with the integral of the rotary ring member relative to said rotary ring member and click rust member interposed,
Wherein said holding the wedge member to be vertically movable interposed between the mounting base member and the rotary shaft member, and possess a holder member which is biased downwardly relative to said mounting base member,
When the holder member is biased downward with respect to the mounting base member, the wedge member is pressed against the rotating shaft member, and the rotating shaft member is locked to the mounting base member so as not to rotate. Work positioning jig. The lock mechanism according to claim 2 has a jack cylinder below the holder member,
By pushing the holder member upward by the jack cylinder,
A workpiece positioning jig characterized in that the wedge member releases the locked state of the rotary shaft member with respect to the mounting base member to make the rotary shaft member rotatable. A conveying pallet, wherein a pair of workpiece positioning jigs according to claim 1 are installed at positions where workpieces are placed.

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