JP2571215Y2 - Work positioning jig - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work positioning jig.

[0002]

2. Description of the Related Art For example, when a body is welded in a manufacturing process of an automobile, a work (body) is mounted on a work mounting surface of a reference seat member fixed to a work station. The work is positioned.

On the other hand, it is necessary to perform a precise dimensional inspection on the reference seat member so that the work can be accurately positioned.

FIG. 6 shows a state of a dimensional inspection on the reference seat member.
A reference block F provided with a square mass E is engaged with a reference groove D of the jig platen A, and the reference block F is Fixed.

A height gauge H is provided on the square mass E, and a work mounting surface Ca of a reference seat member C shown in FIG.
The mounting position of the reference seat member C is measured from the scale of the height gauge H when the corner portion Ca ′ at the point and the edge portion Ha ′ of the tracing stylus Ha of the height gauge H match by measurement. In the case of dimensional defects, measures are taken by a method such as correcting the jig post B.

[0006]

By the way, the reference seat member in the work positioning jig is used to cut off the corners used as measurement points at the time of dimensional inspection in order to match the work when used in actual production. Often dropped.

As described above, when the corners on the work mounting surface are cut off, the dimensions of the reference seat member cannot be measured even if the position of the reference seat member goes wrong during use. However, it was difficult to maintain the positioning accuracy.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a work positioning jig capable of maintaining high work positioning accuracy.

[0009]

In order to achieve the above object, according to the present invention, a plurality of measurement reference surfaces having different directions are provided integrally with the reference seat member at a portion other than the work mounting surface of the reference seat member. When not in use, the measurement reference plane is covered with a protective cover.

[0010]

According to the above arrangement, the dimensions of the reference seat member can be arbitrarily measured by using the measurement reference plane.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention;

FIGS. 1 to 3 show an example in which the work positioning jig according to the present invention is applied to a work positioning device in a body welding process of an automobile production line. As shown in FIG. 3, a jig base 2 and work positioning jigs 3 arranged at a plurality of positions on the jig base 2 are provided.

The work positioning jig 3 is composed of the jig base 2
And a reference seat member 4 attached to the jig post 3a, and a clamper 5 and a cylinder actuator 5a for operating the clamper.

The work 6 is placed at a predetermined position by being placed on the reference seat member 4 and fixed by the clamper 5 as shown in FIG.

As clearly shown in FIG. 1, the reference seat member 4
A work mounting surface 4a formed to be in close contact with the work 6 is provided on the top thereof, and a recess 7 is formed at a portion other than the work mounting surface 4a, specifically, at the left and right side edges of the reference seat member 4. X, Y, Z orthogonal to each other by the side edge surface, the recess inner surface, and the recess bottom surface.
Measurement reference planes 10x, each of which extends along three axial directions of
10y and 10z are configured.

The measurement of the mounting position of the reference seat member 4 on the work positioning jig 3 is performed using the square mass E, the reference block F, the magnet G, and the height gauge H shown in FIG. That is, the edge Ha ′ of the tracing stylus Ha in the height gauge H is connected to the measurement reference plane 10x, 1
The position of the reference seat member 4 is measured from the scale of the height gauge H at that time.

The measurement reference planes 10x, 10y, and 1
0z is formed with high precision at the time of manufacturing the reference seat member 4 and, unlike the work mounting surface 4a, is not scraped off at the time of its use. The mounting position of the seat member 4 can be accurately measured.

As shown in FIG. 4, the reference seat member 4 includes
The protection cover 20 is attached. This protective cover 20
It is an elastic member having a U-shaped cross section made of a resin material or the like and provided with locking projections 20a at opposing parts. Recess 4
b, the measurement reference planes 10x, 10
y, and 10z are covered by the protective cover 20, so that the measurement reference surfaces are protected from spatter and the like generated during welding work.

The protective cover 30 shown in FIG. 5 is composed of an elastic band such as a rubber material or a resin material.
The measurement reference surfaces 10x, 10y, and 10z are covered by being wound around the reference seat member 4 as shown by a chain line in the figure, and the measurement reference surfaces are protected from spatter and the like.

On the other hand, as shown in FIG. 2, an automatic measuring robot 40 is provided near the work positioning device 1 so as to be used at night or the like.
When the work positioning jig is not used, the measurement of the reference seat member can be performed, and the reference seat member can be corrected the next day, so that the work can be positioned with higher accuracy than the above. .

The work positioning jig according to the present invention is not limited to a jig for a welding apparatus in a body welding process of an automobile production line as shown in the embodiment, but also an assembling jig for various products requiring accuracy. However, it can be applied effectively.

[0022]

As described above, according to the work positioning jig according to the present invention, a plurality of measurement reference planes having different directions are provided on the reference seat member other than the work mounting surface. The reference seat member can be arbitrarily and accurately measured by the plurality of measurement reference surfaces without using a separate member other than the reference seat member as a reference for measurement. Since the measurement reference plane is covered during use, it is possible to prevent the measurement reference plane from being damaged, and to maintain a high positioning accuracy of the work.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a work positioning jig according to the present invention.

FIG. 2 is an overall perspective view of a work positioning device employing a work positioning jig according to the present invention.

FIG. 3 is an overall side view of a work positioning apparatus employing a work positioning jig according to the present invention.

FIG. 4 is a perspective view showing one embodiment of a protective cover.

FIG. 5 is a perspective view showing another embodiment of the protective cover.

FIG. 6 is a perspective view showing a state of a dimensional inspection of a reference seat member.

FIG. 7 is a perspective view showing essential parts of a reference seat member and a height gauge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Work positioning device 2 ... Jig surface plate 3 ... Work positioning jig 3a ... Jig post 4 ... Reference seat member 4a ... Work mounting surface 5 ... Clamper 5a ... Cylinder actuator 6 ... Work 7 ... Recess 10x, 10y, 10z: Measurement reference plane 20, 30: Protective cover

Claims (1)

(57) [Scope of request for utility model registration] 1. A work positioning jig for positioning a work placed on the work placement surface, the work positioning jig comprising a reference seat member having a work placement surface formed thereon. A plurality of measurement reference surfaces having different directions are provided integrally with the reference seat member, and the measurement reference surface is covered with a protective cover when not in use. .