JPS6348349Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a workpiece assembly jig that can selectively grip two types of workpieces.

B. Prior art For example, in the assembly process of automobile bodies, two types of workpieces of different car models coming from the same production line are assembled using an assembly jig consisting of a clamp and a holder operated by a cylinder or the like. When assembling the parts by holding them in the same place, the following method is used.

That is, as shown in FIG.
Two types of second supports 2 corresponding to the second workpieces used for the vehicle types are prepared in advance. The first receiver 1 and the second receiver 2 are exchanged on the machine base 3 according to the two types of workpieces flowing through the production line, and the first receiver 1 or the second receiver is replaced. A workpiece is held by a receiver 2 and a clamp (not shown).

As another method, as shown in Figure 2,
A second plate is attached to the side of the first support 5 corresponding to the workpiece.
A second receiver 6 corresponding to the workpiece is rotatably attached via a hinge 7. When the first receiver 5 is used, the second receiver 6 is used in a laid down state as shown by the dashed line in the figure, and when the second receiver 6 is used, the The second receiver 6 is stood upright on the side of the first receiver 5, and the second receiver 6 is fixed to the side of the first receiver 5 using the mounting screw 8.

Furthermore, as another method, as shown in FIG. 3, the first receiver 10 and the second receiver 11 are formed into an L-shaped unit to form one receiver 12, and the receiver 12 is It is rotatably supported via a bracket 13. Then, the receiver 12 is rotated approximately 90 degrees using the cylinder 14 or the like, and the first receiver 10 and the second receiver 1 are rotated by approximately 90 degrees using the cylinder 14 or the like.
1 is made to stand upright.

However, when the first receiver and the second receiver, which correspond to two types of workpieces, are exchanged as described above, there are the following drawbacks.

That is, in the case of the example shown in FIG. 1, there was a drawback that it took time and effort to replace the first receiver 1 and the second receiver 2. In addition, in the case of the example shown in FIGS. 2 and 3, the first and second receivers 5, 6,
When a workpiece is gripped by one of the holders 10 and 11 and a clamp (not shown) and spot welding is performed on the workpiece using a spot welding gun, etc., the other holder is held in standby. It becomes necessary to prevent the spot welding gun from interfering with the spot welding gun. Therefore, in the case of the examples shown in Figures 2 and 3, it is necessary to ensure that the receiver in use and the receiver in standby are located at a sufficient distance apart. However, in order to satisfy these requirements, the entire device had to be large in size.

(b) Purpose of the invention When two types of workpieces flowing through the same production line are gripped by a single mounting jig consisting of a receiver and a clamp, switching for each workpiece can be performed in a short time. At the same time, the assembly jig is made smaller.

C. Structure of the invention A workpiece assembly jig for selectively clamping the first and second workpieces is connected to the first receiver on which the first workpiece is placed, and when the workpieces are clamped, the end portion is 1, so that it is located to the side of the 1st receiver.
a second support that is rotatably arranged below the support and on which a second work is placed on the end thereof; and a first work that is placed on the first support. a first clamp integrally provided with a first gripping part that is in pressure contact with the first clamp; a second clamp having a second gripping part that presses a second workpiece; It is constructed by a third clamp having third and fourth gripping portions arranged in parallel, each of which is in pressure contact with the workpiece.

D. Example FIG. 4 is a drawing showing a workpiece assembly jig according to the present invention. In the figure, reference numeral 20 denotes a fixed first receiver, and the first receiver 20 serves as a receiver for the first work A. 21 is the first deposit 20
A first clamp rotatably supported below via a bracket 22 and a support pin 23,
Due to the rotation angle of the first clamp 21, the right end portion of the first clamp 21 in the figure is connected to the first receiver 20.
It is designed so that it can be positioned on the side of the A second receiver 21a that serves as a receiver for the second workpiece B is provided at this right end.
A first gripping portion 21b that is in pressure contact with the first workpiece A placed on the first receiver 20 is located on the right side in the figure of the first receiver 20 on the a side.
is provided. 24 is a first air cylinder for rotating the first clamp 21 by a predetermined angle;
5 is a support pin 2 at the right end of the first clamp 21 in the figure.
a second clamp rotatably pivoted via 6;
Reference numeral 27 denotes a second air cylinder for rotating the second clamp 25 by a predetermined angle, and is located on the right side of the second holder 21a of the first clamp 21 of the second clamp 25 in the figure. Second gripping portions 25a, 25a are provided on the side surfaces of the end portions to be in pressure contact with the second workpiece B placed on the second receiver 21a. Reference numeral 28 denotes a third clamp that is pivoted to the first receiver 20 via a support pin 29 so as to be rotatable at a predetermined angle so as to face the first clamp 21 disposed below the first receiver 20. , 30 is the third
The third clamp 28 is rotated by a predetermined angle.
air cylinder, and the third clamp 2
8 includes a third gripping portion 28a that is in pressure contact with the first workpiece A placed on the first support 20, and a third gripping portion 28a that is placed on the second support 21a provided on the first clamp 21. A fourth gripping portion 28 that comes into pressure contact with the workpiece B of No. 2
b are provided in the left and right direction.

In the above configuration, when gripping the first workpiece A with the workpiece assembly jig according to the present invention, first, the first and third air cylinders 24 and 30 are shortened, and the first clamp 21 is By rotating the third clamp 28 by a predetermined angle clockwise in the figure and counterclockwise in the figure, the right ends of the first and third clamps 21 and 28 in the figure expand outward. Do it like this. Next, the first clamp 21 and the third
The first receiver 2 located between the clamp 28 of
Place the first workpiece A on top of the workpiece A. In this state, the first and third air cylinders 24, 30 are extended, the first clamp 21 is rotated counterclockwise in the figure, and the third clamp 28 is rotated clockwise in the figure.
The first and third gripping parts 21b and 28a provided on the first and third clamps 21 and 28, respectively, are
The first workpiece A is gripped by pressing the first workpiece A into contact with the first workpiece A.

Furthermore, when gripping the second workpiece B, the first air cylinder 24 is extended and the first clamp 2
1 in the counterclockwise direction in the figure to fix the first clamp 21 in the clamped state and at the same time shorten the second and third air cylinders 27, 30,
By rotating the second clamp 25 clockwise in the figure and the third clamp 28 counterclockwise in the figure by a predetermined angle, the upper part of the second holder 21a provided on the first clamp 21 opens. so that it is in the correct condition. Next, the second workpiece B is placed on the second receiver 21a provided on the first clamp 21. In this state, the second and third air cylinders 27 and 30 are extended, the second clamp 25 is rotated counterclockwise and the third clamp 28 is rotated clockwise by a predetermined angle, and the second and third air cylinders 27 and 30 are rotated by a predetermined angle. By bringing the second and fourth gripping parts 25a and 28b provided on the clamps 25 and 28 into pressure contact with the second workpiece B, the second workpiece B
grasp.

E. Effects of the invention As described above, the workpiece assembly jig is constructed by the first holder and the first to third clamps that are driven by the air cylinders arranged around the first holder. If the first workpiece and the second workpiece can be gripped by the movement of the first to third clamps, the workpiece assembly jig can be switched to accommodate each workpiece. This can be done in a short time by driving an air cylinder. In addition, the present invention has a second receiver movably disposed on the side of the first receiver, and a first receiver placed on the first receiver. Because the first gripping part that comes into pressure contact with the workpiece is integrally provided, when the first holder is used, the second holder is not connected to the first holder.
There is no need to evacuate it to a space apart from the second receiver, and when the second receiver is used, the first receiver is located on the inside of the second receiver. Since the receiver does not get in the way of the second receiver, the first receiver and the second receiver are spaced apart when clamping either the first workpiece or the second workpiece. As a result, the workpiece assembly jig can be made smaller and the installation space can be reduced.

[Brief explanation of the drawing]

1 to 3 are schematic diagrams showing conventional examples of a workpiece assembly jig, and FIG. 4 is a partial sectional view showing a workpiece assembly jig according to the present invention. 20...First receiver, 21...First clamp, 21a...Second receiver, 21b...First grip part, 25...Second clamp, 25a...Second grip Part, 28...Third clamp, 28a...
...Third gripping part, 28b...Fourth gripping part, A...
...First work, B...Second work.

Claims (1)

[Scope of utility model registration request] A workpiece assembly jig for selectively clamping the first and second workpieces is connected to a first receiver on which the first workpiece is placed, and an end portion of which is connected to the first receiver when the workpiece is clamped. the first
a second support that is rotatably arranged below the support and on which a second work is placed on the end thereof; and a first work that is placed on the first support. a first clamp integrally provided with a first gripping part that is in pressure contact with the first clamp; a second clamp having a second gripping portion that comes into pressure contact with a second workpiece; A jig for assembling a workpiece, comprising a third clamp having third and fourth gripping parts arranged in parallel, each of which presses against the workpiece.