JP2001121375A - Workpiece positioning jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a workpiece positioning jig capable of adjusting the position of a knock pin in a wide range with simple operation to position a large number of workpieces with reference holes different in position and pitch. SOLUTION: This workpiece positioning jig 1 having a knock pin 3 fittable into a reference hole of a workpiece W is provided with a position adjusting mechanism 4 for supporting the knock pin 3 movably along a radial direction and a circumferential direction of a concentric circle around a center axis parallel with the axis of the knock pin 3, and a lock mechanism for locking the position adjusting mechanism 4 to fix the knock pin 3 into a desired moved position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a work positioning jig, and more particularly to a work positioning jig suitable for positioning a large work placed on a transport pallet at a predetermined position.

[0002]

2. Description of the Related Art In an assembly line for an engine or the like, a large work such as an engine block is usually positioned and mounted at a predetermined position on a transport pallet. Also, a dedicated positioning support device for positioning and supporting a work in a large-sized work processing line of this type is known (see Japanese Utility Model Laid-Open No. 59-136241).

When positioning a work on the transfer 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 transfer pallet. . The knock pin is detachably screwed into a screw hole opened on the upper surface of the transport pallet so that another work having a different reference hole position or pitch can be positioned. Then, when positioning another work having a different reference hole position or pitch, a pair of screw holes corresponding to the reference hole is added on the transport pallet, and a pair of knock pins are replaced with the added screw holes. Screwed. The new screw holes are added each time a new work having a different reference hole position or pitch appears.

On the other hand, the work positioning and positioning apparatus described in Japanese Utility Model Laid-Open Publication No. Sho 59-136241 is provided with a pair of rotating shafts whose distance between the axes can be adjusted. A knock pin that can be fitted into the reference hole of the work is eccentrically protruded. To position the work on this positioning support device, adjust the distance between the pair of rotating shafts, and adjust each rotating shaft to a predetermined rotation position so that the pair of knock pins match the reference holes of the work. Let it.

[0005]

By the way, in the above-mentioned transport pallet, a new pair of screw holes is additionally provided on the transport pallet every time a new work appears, and a pair of knock pins are replaced in the screw holes. It is necessary to screw together, and there is a problem that a large number of work steps are required for adding a screw hole and replacing a knock pin. 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 a newly appeared workpiece, additional screw holes corresponding to the reference holes may be added. In some cases, it becomes impossible to position the work.

On the other hand, in the work positioning and supporting device described in Japanese Utility Model Laid-Open No. Sho 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 a range determined by the distance between the pair of rotating shafts and a width corresponding to the diameter of the rotating circle of each knock pin, and adjustment in the width direction thereof. The range is extremely narrow. For this reason,
There is a problem that a new work in which the positions of the reference holes are greatly different cannot be positioned, and the applicable range is narrow.

Accordingly, an object of the present invention is to provide a work 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 works having different positions and pitches of reference holes. .

[0008]

As a means for solving the above-mentioned problems, a work positioning jig according to the first invention comprises:
A work positioning jig having a knock pin that can be fitted into a reference hole of a work, the work positioning jig movably supporting the knock pin along a circumferential direction and a radial direction of a concentric circle centered on a central axis parallel to the axis of the knock pin. And a lock mechanism for locking the position adjustment mechanism and fixing the knock pin at a desired movement position.

In the work positioning jig according to the first invention, when the lock mechanism releases the locked state of the position adjustment mechanism, the position adjustment mechanism sets the knock pin to a concentric circle centered on a central axis parallel to its axis. It is movably supported along the direction and the radial direction. Therefore, the knock pin can be adjusted to a desired position within the movement range. When the lock mechanism locks the position adjustment mechanism, the knock pin is fixed at a desired position within the movement range.

A work positioning jig according to a second invention is a work positioning jig, wherein the position adjusting mechanism according to the first invention is rotatably supported inside a mounting base member formed in a ring shape; A rotating shaft member rotatably supported inside the rotating ring member, an arm member protruding from the rotating shaft member in a radial direction thereof, and a second end having one end pivotally attached to a tip end of the arm member. A second link member having one end pivotally connected to the rotating ring member and the other end pivotally connected to the other end of the first link member; The knock pin is disposed on or near a pivot point between the member and the first link member.

In the work positioning jig according to the second invention, when the lock mechanism releases the locked state of the position adjusting mechanism, the rotating ring member and the rotating shaft member of the position adjusting mechanism are rotatable with respect to the mounting base member. Becomes
In addition, they can rotate relative to each other. Then, by rotating the rotating ring member and the rotating shaft member in the same direction with respect to the mounting base member, the position adjusting mechanism includes the arm member, the first member.
A knock pin is supported via the link member and the second link member so as to be movable in a circumferential direction of a concentric circle around the axis of the rotary shaft member. In addition, when the rotating ring member and the rotating shaft member rotate relative to each other, the position adjusting mechanism moves the knock pin via the arm member, the first link member and the second link member to a radius of a concentric circle centered on the axis of the rotating shaft member. The support is movable along the direction. Therefore, the knock pin can be adjusted to a desired position within the movement range.
When the lock mechanism locks the position adjustment mechanism, the rotation ring member and the rotation shaft member cannot rotate with respect to the mounting base member, and the knock pin is fixed at a desired position within the movement range.

Further, a work positioning jig according to a third aspect of the present invention is the work positioning jig according to the second aspect, wherein the lock mechanism capable of locking the position adjusting mechanism is integrally engaged with the rotating ring member in the rotation direction. A wedge member interposed between the mounting base member and the rotating shaft member so as to be vertically movable, and by lowering the wedge member to lock the rotating shaft member to the mounting base member so as to be unrotatable; And a holder member interposed between the mounting base member and the rotating shaft member so as to be vertically movable and urged downward with respect to the mounting base member.

In the work positioning jig according to the third aspect of the present invention, since the holder member of the lock mechanism is normally urged downward with respect to the mounting base member, the wedge member moves downward to rotate the rotating shaft member. Is locked to the mounting base member to prevent rotation, and is engaged in the rotation direction of the rotating ring member to disable rotation. The lock mechanism holds the position adjustment mechanism in a 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 the locked state of the position adjusting mechanism. Cancel.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a work positioning jig according to the present invention will be described below 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 work positioning jig according to one embodiment, and FIG. 2 is a side view of a transport pallet provided with a work positioning jig according to one embodiment. 3 is a perspective view showing a position adjusting mechanism of the work positioning jig according to one embodiment; FIG. 4 is a plan view showing a position adjusting mechanism of the work positioning jig according to one embodiment;
FIG. 5 is a longitudinal sectional view showing a position adjusting mechanism and a lock mechanism of the work positioning jig according to one embodiment, FIG. 6 is a bottom view showing a lock mechanism of the work positioning jig according to one embodiment, and FIG. FIG. 3 is an exploded perspective view of a work positioning jig according to the embodiment.

As shown in FIGS. 1 and 2, a work positioning jig 1 according to one embodiment is a jig for positioning a relatively large work W such as an engine mounted on a transport pallet P. A mounting base member 2 that can be fixed on the transport pallet P, and a knock pin 3 protruding upward so as to be fitted into a reference hole H (see FIG. Are installed before and after.

The work positioning jig 1 is provided with a position adjusting mechanism 4 (FIG. 3) for movably supporting the knock pin 3 along a circumferential direction and a radial direction of a concentric circle centered on a central axis parallel to the axis of the knock pin 3. To FIG. 5). The work positioning jig 1 also includes a lock mechanism 5 (see FIGS. 5 and 6) for locking the position adjustment mechanism 4 and fixing the knock pin 3 at a desired movement position.

As shown in FIGS. 3 to 5, the position adjusting mechanism 4 includes a rotating ring member 6 formed in a ring shape and rotatably supported inside the mounting base member 2; Rotary shaft member 7 rotatably supported inside
An arm member 8 protruding from the rotating shaft member 7 in the radial direction; a first link member 9 having one end pivotally attached to a distal end of the arm member 8; And a second link member 10 having the other end pivotally attached to the other end of the first link member 9. The knock pin 3 is disposed on a pivot point between the second link member 10 and the first link member 9.

As shown in FIGS. 5 and 6, the lock mechanism 5 is configured to move the mounting base member 2 and the rotation shaft member 7 together with the rotation ring member 6 in a state of being integrally engaged with the rotation ring member 6 in the rotation direction. A wedge member 11 interposed between the base member 2 so as to be vertically movable, and the wedge member 11 locks the rotation shaft member 7 to the mounting base member 2 by the downward movement so that the rotation shaft member 7 cannot be rotated. A holder member 12 is provided between the shaft member 7 so as to be vertically movable and urged downward with respect to the mounting base member 2.

As shown in FIGS. 5 and 7, the mounting base member 2 has a ring shape fitted into the mounting hole P1 of the transport pallet P. A flange 2A 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. The rotating ring member 6 is provided on the inner periphery of the upper portion of the mounting base member 2.
Are formed rotatably, and a ring ridge 2B is formed for regulating the vertical movement in the vertical direction. Further, on the lower surface of the mounting base member 2, the holder member 12 is provided.
A pair of engagement pieces 2C for restricting the rotation of the projection are provided so as to face each other in the diametrical direction (see FIG. 6). The mounting base member 2 has a plurality of receiving holes 2
D are uniformly arranged in the circumferential direction, and the holder member 12 is inserted into each of the receiving holes 2D via a pusher 13.
The coil springs 14 for pressing downward are accommodated respectively.

The knock pin 3 has a flange 3A integrally formed at the lower end thereof, which is fixed to the upper surface of the other end of the second link member 10 via a bolt B2. It protrudes above the other end. A pivot pin 3B protruding downward from the flange 3A is coaxially arranged on the knock pin 3 and integrally formed. The other end of the first link member 9 is pivotally attached below the other end of the second link member 10 via the pivot pin 3B.

The rotating ring member 6 is rotatably supported by a ring ridge 2B of the mounting base member 2 via a sliding collar 15 and a sliding ring 16, and is restricted from moving vertically. I have. The sliding collar 15 is formed integrally with the rotating ring member 6 and has an L-shaped cross section in which the upper surface abuts on a brim portion 6A projecting above the mounting base member 2, and has an upper surface and an inner periphery of the ring ridge 2B. It is in sliding contact with the surface. 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 ridge 2B.

At the lower part of the rotary ring member 6, the wedge member 11 is fitted and integrally engaged in the rotational direction, so that engagement slits 6B extending upward from its lower end are provided at three places in the circumferential direction. They are formed at intervals (see FIG. 6). An engagement step 6C is formed on the inner periphery of the rotating ring member 6 to restrict the axial movement of the rotating shaft member 7 in the upward direction. Further, a flange 18A integrally formed with the pivot pin 18 is fixed to the upper surface of the flange 6A of the rotating ring member 6 via a bolt B3.
One end of the second link member 10 is pivotally mounted above the flange 6A via a pivot pin 18 protruding above the flange 6A.

The rotary shaft member 7 is rotatably supported on the inner periphery of the rotary ring member 6 via a bush 19. A base end of the arm member 8 is fixed to an upper end of the rotating shaft member 7 via a bolt B4 and a knock pin K2. In addition, a tapered cone 7A whose diameter is increased downward at a gradient of about 10 degrees is formed below the rotary shaft member 7. Above the tapered cone 7A, an engaging step 7B is formed which comes into contact with the step 6C of the rotating ring member 6 via the sliding ring 20. The rotating shaft member 7 has a sliding ring 21 interposed between the lower surface of the arm member 8 fixed to the upper end thereof and the upper end surface of the rotating ring member 6 so that the rotating shaft member 7 can move in the vertical axial direction. Movement is regulated. A disc-shaped upper cap 22 is fixed on the base end of the arm member 8 via a bolt B5.
At the lower end of the rotating shaft member 7, a stepped disk-shaped lower cap 23 is provided with a long bolt 2 penetrating through the center of the rotating shaft member 7.
4 is fixed.

The length of the arm member 8 is set to a relatively short length such that the tip of the arm member 8 faces near the outer periphery of the flange portion 6A of the rotating ring member 6. A flange 25A formed integrally with the pivot pin 25 is fixed to the upper surface of the distal end of the arm member 8 via a bolt B6. One end of the first link member 9 is pivotally attached to the distal end of the arm member 8 via a pivot pin 25 projecting downward from the distal end of the arm member 8.

As shown in FIG. 4, the first link member 9 and the second link member 10 are provided with a collar 6A so that the knock pin 3 can be located above the collar 6A of the rotary ring member 6. (See FIG. 7).

The wedge member 1 constituting the lock mechanism 5
1 has a vertically long block shape as shown in FIG. As shown in FIG. 5, the wedge member 11 has an inner surface facing the rotating shaft member 7 formed on a slope having a reverse slope that can be in close contact with the tapered cone 7A. The wedge member 11 is fitted into each of the engagement slits 6B formed at the lower portion of the rotating ring member 6, and integrally engages with the rotating ring member 6 in the circumferential direction thereof, and the axial direction and It is movable by a predetermined amount in the radial direction.

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. It is formed in a substantially cylindrical shape. This holder member 12
A flange 12A projecting downward from the mounting base member 2 is formed on the outer periphery of the lower end of the mounting base member 2. The flange 12A has a pair of engaging pieces 2C projecting from the lower surface of the mounting base member 2. A pair of engagement slits 12 </ b> B that are engaged to restrict rotation of the holder member 12 are formed. A ring ridge 12 </ b> C that locks the upper end of each wedge member 11 is formed on the inner periphery of the upper end of the holder member 12. Further, a stop ring 27 that locks the lower end of each wedge member 11 via a slide ring 26 is mounted on the inner periphery of the holder member 12.

The holder member 12 is provided with each wedge member 11.
At the same time, it is movable vertically by a predetermined amount with respect to the mounting base member 2 and the rotating shaft member 7 in the vertical axis direction. The holder member 12 normally urges each wedge member 11 by rotating the wedge member 11 by urging the collar portion 12A downward through each pusher 13 by each coil spring 14 built in the mounting base member 2. The rotary shaft member 7 is locked non-rotatably by being pressed against the tapered cone 7A and the inner periphery of the holder member 12. And this holder member 12
When pushed upward against the urging force of each coil spring 14, each wedge member 11 is separated from the tapered cone 7A to release the locked state, and the rotary shaft member 7 is configured to be rotatable. ing.

The work positioning jig 1 according to the embodiment configured as described above is used, for example, as shown in FIG. In this case, each work positioning jig 1 is, as shown in FIG.
The mounting base member 2 is fitted into the mounting hole P1 of the transport pallet P, and the flange 2A is fixed to the upper surface of the transport pallet P via the bolt B1 and the knock pin K1.

In each of the work positioning jigs 1 installed on the transport pallet P, the holder member 12 of the lock mechanism 5 is usually attached to the mounting base member 2 by the coil springs 14 built in the mounting base member 2. Since the wedge members 11 are urged downward, the wedge members 11 move downward with respect to the mounting base member 2 and the rotary shaft member 7 together with the holder member 12. Each wedge member 11 is pressed against the tapered cone 7 </ b> A of the rotating shaft member 7 and the inner periphery of the holder member 12 to lock the rotating shaft member 7 non-rotatably with respect to the mounting base member 2. At the same time, each wedge member 11 is engaged with each engagement slit 6B of the rotating ring member 6.
To lock the rotation ring member 6 so that it cannot rotate. Thus, the lock mechanism 5 holds the position adjustment mechanism 4 in a locked state.

In order to adjust the positions of the knock pins 3 of the work positioning jigs 1 so as to match the reference holes H, H of the work W placed on the transport pallet P, first, the positions of the work positioning jigs 1 are adjusted. The locked state of the position adjustment mechanism 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, for example, as shown in FIG. That is, the ring-shaped pushing member J1 fixed to the end 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 a manual type, a pneumatic type, a hydraulic type, and an electric type.

The holder member 12 is controlled by the jack cylinder J.
Is pushed upward by a predetermined amount, each wedge member 1
1 moves upward together with the holder member 12 with respect to the mounting base member 2 and the rotating shaft member 7 by a predetermined amount. And
Each wedge member 11 releases the locked state of the rotating shaft member 7 with respect to the mounting base member 2 and makes the rotating shaft member 7 rotatable. In addition, 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.

In the position adjustment mechanism 4 in which the locked state has been released, the rotating ring member 6 and the rotating shaft member 7 can be freely rotated with respect to the mounting base member 2, respectively.
They can rotate relative to each other. And the rotating ring member 6
When the rotation shaft member 7 rotates in the same direction with respect to the mounting base member 2, the position adjustment mechanism 4 allows the arm member 8,
The knock pin 3 is concentrically centered on the axis of the rotary shaft member 7 via the first link member 9 and the second link member 10,
That is, it is supported movably along the circumferential direction of a concentric circle parallel to the transport pallet P. The relative rotation of the rotating ring member 6 and the rotating shaft member 7 causes the position adjusting mechanism 4 to rotate.
Moves the knock pin 3 through the arm member 8, the first link member 9 and the second link member 10 in a radial direction of a concentric circle centered on the axis of the rotary shaft member 7, that is, a concentric circle parallel to the transport pallet P. Support as much as possible.

Then, each knock pin 3 of the pair of work positioning jigs 1 is moved to a desired position within the movement range so as to match the reference holes H, H of the work W placed on the transport pallet P. The operation of moving the pair of knock pins 3 can be performed manually using an appropriate jig, but can be performed accurately using, for example, a robot hand.

Subsequently, the pair of jack cylinders J are contracted downward while holding the pair of knock pins 3 at desired positions. By this operation, in each work positioning jig 1, the wedge member 11 moves downward with respect to the mounting base member 2 and the rotary shaft member 7 together with the holder member 12 urged downward. The wedge member 11 locks the rotating shaft member 7 to the mounting base member 2 so as not to rotate, and engages with the rotating direction of the rotating ring member 6 to disable the rotating ring member 6. Thus, the lock mechanism 5 of each work positioning jig 1 is again moved to the position adjustment mechanism 4.
As a result, the rotating ring member 6 and the rotating shaft member 7 of each work positioning jig 1 cannot rotate with respect to the mounting base member 2, and the pair of knock pins 3
Is fixed at a desired position within the movement range.

As described above, in the work positioning jig 1 of one embodiment, the lock mechanism 5 is
By releasing the locked state, the knock pin 3 can be adjusted to a desired position within its movement range, and the locking mechanism 5 locks the position adjustment mechanism 4 so that the knock pin 3 can move to a desired position within the movement range. Fixed in position. Therefore, according to the pair of front and rear work positioning jigs 1 installed on the transfer pallet P, a number of works W having different positions of the reference holes H, H and pitches are positioned at desired positions on the same transfer pallet P. be able to.

A work positioning jig 1 according to one embodiment
In the above, the position adjusting mechanism 4 is pushed by an extremely simple operation of pushing the holder member 12 of the lock mechanism 5 upward with respect to the mounting base member 2 and releasing the pushing operation.
Can be released and the position adjusting mechanism 4 can be held in the locked state again, so that the position adjusting operation of the knock pin 3 can be easily performed. In addition, since the position adjusting mechanism 4 is configured by a rotating link mechanism including the mounting base member 2, the rotating ring member 6, the rotating shaft member 7, the arm member 8, the first link member 9, and the second link member 10, The work of adjusting the position of the knock pin 3 can be performed quickly.

Incidentally, the work positioning jig 1 of one embodiment
In the above, 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, but the knock pin 3 is located in the second position near the pivot point.
It may be installed on the link member 10 or the first link member 9.

The inclination 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, and the taper cone 7A and the holder member 12 The inclination is set to about 10 degrees in order to act in the radial direction. However, this gradient can be appropriately changed according to the urging force of the coil spring 14 for urging the holder member 12 downward.

The work positioning jig 1 of one embodiment does not necessarily need to be installed in a pair on the transport pallet P. For example, when a knock pin corresponding to one of the reference holes H, H of the work W placed on the transport pallet P is protruded at a predetermined position on the transport pallet P, the reference holes H, H
By installing a single work positioning jig 1 corresponding to the other one of the workpieces H on the transport pallet P, it is possible to position workpieces W having different positions of the reference holes H, H and pitches on the same transport pallet P. It is possible.

Further, a work positioning jig 1 according to one embodiment
Need not necessarily be installed on the transport pallet P,
The work W can be installed on an appropriate mounting table on which the work W is mounted.

[0042]

As described above, in the work positioning jig according to the first invention, when the lock mechanism releases the locked state of the position adjustment mechanism, the position adjustment mechanism moves the knock pin to the center axis parallel to the axis thereof. Are supported so as to be movable in the circumferential direction and the radial direction of a concentric circle centered at the center.
Therefore, the knock pin can be adjusted to a desired position within the movement range. When the lock mechanism locks the position adjustment mechanism, the knock pin is fixed at a desired position within the movement range. Therefore, according to the work positioning jig according to the first invention, it is possible to position a large number of works having different positions and pitches of the reference holes.

In the work positioning jig according to the second invention, when the lock mechanism releases the locked state of the position adjusting mechanism, the rotating ring member and the rotating shaft member of the position adjusting mechanism are rotatable with respect to the mounting base member, respectively. Becomes
In addition, they can rotate relative to each other. Then, by rotating the rotating ring member and the rotating shaft member in the same direction with respect to the mounting base member, the position adjusting mechanism includes the arm member, the first member.
A knock pin is supported via the link member and the second link member so as to be movable in a circumferential direction of a concentric circle around the axis of the rotary shaft member. In addition, when the rotating ring member and the rotating shaft member rotate relative to each other, the position adjusting mechanism moves the knock pin via the arm member, the first link member and the second link member to a radius of a concentric circle centered on the axis of the rotating shaft member. The support is movable along the direction. Therefore, the knock pin can be adjusted to a desired position within the movement range.
When the lock mechanism locks the position adjustment mechanism, the rotation ring member and the rotation shaft member cannot rotate with respect to the mounting base member, and the knock pin is fixed at a desired position within the movement range. Therefore, according to the work positioning jig according to the second invention, it is possible to position a large number of works having different positions and pitches of the reference holes. in addition,
Since the position adjusting mechanism is composed of a rotating link mechanism including a mounting base member, a rotating ring member, a rotating shaft member, an arm member, a first link member and a second link member, quick adjustment of the position of the knock pin is performed. Can be.

In the work positioning jig according to the third aspect of the present invention, since the holder member of the lock mechanism is normally urged downward with respect to the mounting base member, the wedge member moves downward to rotate the rotating shaft member. Is locked to the mounting base member to prevent rotation, and is engaged in the rotation direction of the rotating ring member to disable rotation. The lock mechanism holds the position adjustment mechanism in a 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 the locked state of the position adjusting mechanism. Cancel. That is, according to the work positioning jig according to the third aspect of the present invention, the position adjusting mechanism is operated by an extremely simple operation of pushing the holder member upward with respect to the mounting base member and releasing the pushing operation. Can be released and the position adjusting mechanism can be held in the locked state again, so that the position adjusting operation of the knock pin can be easily performed.

[Brief description of the drawings]

FIG. 1 is a plan view of a transport pallet on which a work positioning jig according to an embodiment of the present invention is installed.

FIG. 2 is a side view of a transport pallet provided with a work positioning jig according to one embodiment.

FIG. 3 is a perspective view showing a position adjusting mechanism of a work positioning jig according to one embodiment.

FIG. 4 is a plan view showing a position adjusting mechanism of a work positioning jig according to one embodiment.

FIG. 5 is a longitudinal sectional view showing a position adjusting mechanism and a lock mechanism of a work positioning jig according to one embodiment.

FIG. 6 is a bottom view showing a lock mechanism of the work positioning jig according to one embodiment.

FIG. 7 is an exploded perspective view of a work positioning jig according to one embodiment.

[Explanation of symbols]

 1: work positioning jig 2: mounting base member 3: knock pin 4: position adjusting mechanism 5: locking 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 (3)

[Claims] 1. A work positioning jig having a knock pin that can be fitted into a reference hole of a work, wherein the knock pin is provided along a circumferential direction and a radial direction of a concentric circle centered on a central axis parallel to an axis of the knock pin. A work positioning jig comprising: a position adjusting mechanism that movably supports the knocking pin; and a lock mechanism that locks the position adjusting mechanism and fixes the knock pin at a desired moving position. 2. The work positioning jig according to claim 1, wherein the position adjusting mechanism is a rotatable ring member rotatably supported inside a ring-shaped mounting base member, and the rotatable ring member. A rotating shaft member rotatably supported inside the ring member, an arm member protruding from the rotating shaft member in a radial direction thereof, and a first link having one end pivotally attached to a tip end of the arm member A second link member having one end pivotally connected to the rotating ring member and the other end pivotally connected to the other end of the first link member. A work positioning jig, wherein the knock pin is provided on or near a pivot point with the first link member. 3. The work positioning jig according to claim 2, wherein the lock mechanism capable of locking the position adjustment mechanism is integrally engaged with the rotating ring member in a rotation direction thereof. A wedge member interposed between the mounting base member and the rotary shaft member so as to be vertically movable, and by lowering the wedge member to lock the rotary shaft member to the mounting base member so as to be unrotatable; Vertically mounted between the mounting base member and the rotating shaft member, and
A work positioning jig comprising: a holder member biased downward with respect to a mounting base member.