JPH09300160A - Positioning jig for work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly set-up and switch a supporting member of a work, by installing the switching pieces to be removably connected with receiving pieces by dovetail groove fitting engagement, at both lower ends of the arched supporting member. SOLUTION: A supporting member 4 connected with a column 2, is removed first, when the supporting member 4 is exchanged and switched. Thereby the dovetail groove fitting engagement of the switching piece with the receiving piece 3, is released by sliding the switching piece in a retirement direction, by pressing a stopper 7 by a finger or a suitable tool, and the supporting member 4 is separated from the column 2. The other supporting member 4 is connected with the column 2 after the supporting member 4 is separated. As mentioned in the above, the exchange and switch of the supporting member 4 can be rapidly performed by sliding the switching piece 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning jig for a work piece processed by a spot welding machine or other processing machine.

[0002]

2. Description of the Related Art When a vehicle body panel is spot welded by a spot welding machine, a work panel is positioned and supported by a jig to spot weld a predetermined portion.

As shown in FIGS. 7 and 8, a conventional positioning jig has a flange-shaped receiving piece 10 in which a plurality of columns 2 are erected on a base plate 1 and connecting pins 11 are projected.
Is provided at the upper end of each of the columns 2, and the flange-shaped switching piece 12 that is detachably fitted to the pin 11 of the receiving piece 10 is provided at both lower ends of the arch-shaped support member 4 made of a pipe. It has a structure in which a work support piece 5 for positioning and supporting the work W is fixedly provided on the upper part of the.

Then, as shown in FIG. 9, in the vicinity of each of the columns 2 on the base plate 1, a clamp arm 13 for pressing and clamping the switching piece 12 facing the receiving piece 10 from the upper surface onto the receiving piece 10. And a cylinder 14 for rotating the clamp arm 13 up and down.

The arch-shaped support member 4 is prepared in advance with several types of support members 4 each having a work support piece 5 fixed to the upper portion thereof and having a shape corresponding to the form of various works W. In addition, a predetermined supporting member 4 having a work supporting piece 5 corresponding to the form of the work W to be processed is coupled to the flange-shaped receiving piece 10 of each strut 2 on the base plate 1 via a pin 11. , Clamps and positions and supports the work W.

That is, the base plate 1 provided with the support columns 2 is commonly used for various supporting members 4, but the various supporting members 4 are switched to predetermined supporting members 4 by changing the work W to be positioned and supported. Be done.

[0007]

In the conventional jig having the above-mentioned structure, since there is a distance between the receiving pieces 10 on the support columns 2, it is necessary to attach the switching piece 12 of the supporting member 4 to the receiving pieces 10. There is a problem that it is difficult to align and the positional accuracy of the pin 11 on the side of the receiving piece 10 is difficult to obtain, and it takes a long time to perform the switching setup of the support member 4 based on the change of the work.

Further, it is necessary to dispose a clamp device including a clamp arm 13 and a cylinder 14 for rotating the clamp arm 13 up and down in the vicinity of each of the columns 2, and a fluid pressure is supplied to and discharged from the cylinder 14. There is also a problem that the equipment costs for the supply / discharge control valve for piping and fluid pressure and a large number of cylinders are high.

In view of the above conventional problems, an object of the present invention is to
It is an object of the present invention to provide a workpiece positioning jig that enables quick setup switching of a work support member with a simple structure and operation.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is to provide a plurality of columns on a base plate, and to install a receiving piece at the upper end of each column to form an arch type. A switching piece which is detachably connected to the receiving piece by dovetail groove fitting is provided at both lower ends of the supporting member, and a work supporting piece for positioning and supporting the work is fixedly provided on the upper portion of the supporting member.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a base plate, 2
Is a plurality of columns that are erected on the base plate. A receiving piece 3 is provided at the upper end of each of the columns 2.

Reference numeral 4 is an arch-shaped support member, and switching pieces 6 that are detachably connected to the receiving piece 3 by dovetail groove fitting are provided at both lower ends thereof, and a work W is provided above the support member 4. A work support piece 5 for positioning and supporting is fixedly provided.

As shown in FIGS. 2 to 6, the receiving piece 3 and the switching piece 6 are detachably connected to each other by a dovetail groove fitting. As shown in FIGS. 2 to 6, the receiving piece 3 is provided with a convex dovetail 3a. This is a structure in which a dovetail groove 6a that fits into the dovetail 3a is provided. still,
The receiving piece 3 may be provided with a dovetail groove, and the switching piece 6 may be provided with a dovetail groove.

Further, in order to prevent the switching piece 6 coupled to the receiving piece 3 from coming off, it is desirable to provide a stopper 7 on the receiving piece 3. The stopper 7 is always urged in the upward direction by a spring 8, and a curved surface 7a is formed on the front surface so that the stopper 7 is pressed and retracted by the lower surface of the switching piece 6 when the switching piece 6 is coupled. A locking surface 7b is formed which contacts the end surface of the piece 6.

Since the present invention has the structure as described above, the receiving piece 3 of the plurality of columns 2 erected on the base plate 1 is provided.
On the other hand, in order to connect the arch-shaped support member 4, the dovetail grooves 6a of the switching pieces 6 provided at both lower ends of the support member 4 are slid together with the dovetails 3a protruding from the receiving piece 3. Thus, the stopper 7 is pushed by the lower surface of the switching piece 6 to be immersed therein, and when the rear end of the switching piece 6 passes through the stopper 7, the stopper 7 is pushed up by the spring 8 and the rear end surface of the switching piece 6 is covered with the stopper 7. The locking surface 7b abuts and the switching piece 6 and the receiving piece 3 are fitted in the dovetail groove, and the supporting member 4 is positioned in the front-rear, left-right, and up-down directions, and is connected to the column 2.

In the case of changing the work W, the work W to be changed by removing the support member 4 connected to the column 2.
It is exchanged and switched to another support member 4 having a work support piece 5 corresponding to the support.

To switch the support member 4 for replacement, first, the support member 4 connected to the support column 2 is removed. for that reason,
The stopper 7 is depressed by a fingertip or an appropriate tool to be retracted, and the switching piece 6 is slid in the backward direction so that the dovetail groove fitting with the receiving piece 3 is released and the supporting member 4 is separated from the support column 2. After the support member 4 is separated, the other support member 4 is joined to the support column 2 as described above.

As described above, when the support member 4 is connected to the support column 2, the portion of the receiving piece 3 where the stopper 7 is provided is used as a temporary placing base for the switching piece 6 to slide it, so that one-touch operation is possible. The switching piece 6 and the receiving piece 3 are fitted in a dovetail groove, positioned in the front-back, left-right, and up-down directions and connected to the support column 2. Even when the support member 4 is exchanged and switched, the sliding direction at the time of the connection is used. By sliding the switching piece 6 in the opposite direction, the pieces can be separated with one touch, and quick setup switching can be obtained.

Further, since the switching piece 6 and the receiving piece 3 are fitted in a dovetail groove, the pipes for supplying and discharging the fluid pressure, the fluid pressure supply / discharge control valve and the many cylinders are expensive as in the conventional case. It is possible to eliminate the clamp device, which requires facility cost.

[0020]

As described above, according to the present invention, it is possible to easily perform quick setup changeover and jig accuracy adjustment by a simple structure and operation of a work supporting member, and productivity in machining various types of workpieces. It is possible to provide a positioning jig for a work piece which is improved in cost and is inexpensive in equipment cost.

[Brief description of drawings]

FIG. 1 is a side view of a jig of the present invention.

FIG. 2 is an enlarged perspective view of an arrow A portion of FIG.

FIG. 3 is a top perspective view of a receiving piece.

FIG. 4 is a bottom perspective view of the switching piece.

FIG. 5 is a sectional view taken along line BB of FIG. 2;

FIG. 6 is a sectional view taken along line CC of FIG.

FIG. 7 is a side view of a conventional jig.

FIG. 8 is a perspective view of a main part of a conventional jig.

9 is a cross-sectional view showing a fitted state of a portion viewed from an arrow D in FIG.

[Explanation of symbols]

 1 Base Plate 2 Support 3 Receiving Piece 3a Dovetail 4 Supporting Member 5 Work Supporting Piece 6 Switching Piece 6a Dovetail Groove 7 Stopper 7a Curved Surface 7b Locking Surface

Claims (1)

[Claims] 1. A plurality of columns are erected on a base plate, a receiving piece is provided at an upper end of each column, and the receiving pieces are detachably coupled to both ends of an arch-shaped supporting member by dovetail groove fitting. A workpiece positioning jig is provided on the upper part of the supporting member, and a work supporting piece for positioning and supporting the work is fixedly provided.