JP2677032B2 - Work holding device - 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 holding device for positioning and fixing a work at a predetermined position with respect to a work carrying member, using a body side panel of an automobile body as a work.

[0002]

2. Description of the Related Art The process of assembling an automobile body consists of a floor main process, a main body process, a metal line process, etc. In the main body process, the body side is attached to the floor main assembled in the floor main process. Panels and roof panels are assembled together. In addition to these processes, a body side assembly line for assembling a body side panel for carrying in the main body process is provided as a sub line (branch line) on the upstream side of the main body process. This body side assembly line also has a plurality of stages, like other lines. The outline of the body side assembling process is shown in FIG. 4, and is composed of a plurality of stages 10a to 10n. On the downstream side of the stage 10a into which the body side panel W is loaded, there are disposed a striking stage and a stage into which the body side inner panel is loaded. Be transported.

[0003]

In the body side assembling process shown in FIG. 4, the panel member is sequentially transported from the first stage 10a to the final stage 10n by a transport member called a shuttle bar or a transfer bar. FIG. 5A is a view showing a conventional example of any stage constituting the above body side assembly line. A support member 12 is attached to a base 11 of the stage, and a shuttle mounted on this support member 11 is mounted. The bar 13 linearly reciprocates in the direction perpendicular to the paper surface. Fingers 14 for supporting the work are fixed to the shuttle bar 13. FIG. 5B shows the finger 14. Also in this body side assembling step, a plurality of types of workpieces having different shapes and the like are mixed and transported. Therefore, conventionally, the fingers 1 are arranged so as to support a common part in all kinds of works to be transported.
The shape and mounting position of 4 are set. However, in such a form, since the types of works that can be supported by one type of finger are limited to about three types, the position of the finger and the like must be changed every time the type of the conveyed works is changed. Didn't get

The present invention uses a body side panel constituting an automobile body as a work, and holds a work holding device which is attached to a conveying member of a body side assembly line in order to hold a large number of works having different shapes. The purpose is to provide.

[0005]

In order to achieve the above object, the present invention is a work which is attached to a carrying member for carrying a body side panel having a sill portion formed on one side thereof and which supports the body side panel. In the holding device described above, a sill clamp means for clamping the sill portion is vertically movably attached to the conveying member, and a plurality of support rods for supporting the panel from the lower surface at the center portion in the width direction are vertically movably attached. And a supporting unit mounted on the conveying member.

[0006]

The body side panel is clamped by the sill clamp member at the sill portion at one end, and the lower surface of the central portion is supported by a large number of support rods in the support unit. By adjusting the positions of the plurality of support rods in the vertical direction, it is possible to support the plurality of panel materials at desired positions in accordance with the shape of the lower surface of the panel material. Even when the shape of the panel material to be held is changed, the sill portion having the common shape and the support rod that can be changed arbitrarily can be quickly dealt with.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on one embodiment of the present invention shown in the drawings. FIG. 1 is a front sectional view showing the carry-in stage 10a in the body side assembly line shown in FIG. 4, and shows a portion corresponding to FIG. 5 (A) showing a conventional example. FIG. 2 shows a plan view of FIG.

The base 2 provided on the stage 10a
1, a first shuttle bar 24 and a second shuttle bar 25 are attached by support members 22 and 23, respectively,
These shuttle bars 24 and 25 are plane type shuttle bars which are reciprocally movable in a direction perpendicular to the plane of the drawing. As shown in FIG. 3, air cylinders 26 are attached to the first shuttle bar 24 corresponding to one stage as shown in FIG. 3, and the work W is silled on the rod 27 of each air cylinder 26. A sill receiving seat 28 supported by S and a sill clamp arm 29 that clamps the work W between the sill receiving seat 28 are mounted. The sill clamp arm 29 is rotated by 90 ° by the clamp cylinder 30 to move the work W to the sill portion S
Clamp at the part of. Thus, the first shuttle bar 24 corresponds to the sill portion S of the work W, that is, the lower portion of the vehicle body, and the second shuttle bar 25 corresponds to the central portion of the work W. As described above, as a result of clamping the sill portion S of the work W by using the sill clamp arm 29, the sill portion S has a relatively common shape even if the types of the work are different. ,
It becomes possible to hold all the works on the shuttle bar 24.

A support unit 31 is attached to the second shuttle bar 25, and as shown in FIG. 3, five support units are attached so as to correspond to one stage. One support unit 31 is shown in FIG. 3, in which eight servo cylinders 32 with brakes are linearly arranged along the shuttle bar 25 and attached to the frame 33. Wheels 34 rolling on the shuttle bar 25 are provided at the lower end of the frame 33, and the wheel 34 allows the support unit 31 to move along the shuttle bar 25 by a predetermined stroke. In order to move the support unit 31, a servo motor 35 is attached to the frame 33, a rotor 37 fitted to a ball screw 36 rotatably provided on the shuttle bar 25, and a main shaft of the servo motor 35. The pulley attached to
The timing belt 38 is stretched around. Rotating body 37
When this moves axially due to the rotation of, the movement is
It is transmitted to the support unit 31. This movement is performed when the type of work to be transported is changed.

Workpiece receivers 41 are fixed to the tips of the support rods 40 that move back and forth by the respective cylinders 32. By changing the vertical positions of the respective work holders 41, predetermined parts corresponding to the works can be formed. The work receiving portion 41 will support it. As shown in FIG. 3, by changing the projecting lengths of the plurality of support rods 40 in the vertical direction, the work receiving portion 4 at the tip of the support rods is changed.
1 makes it possible to form the contour of the supporting portion corresponding to the contour of the lower surface of the work W. Each work receiving portion 41 is provided with a sensor 42 as shown in FIG. 1 in order to detect that the work receiving portion 41 contacts the work W.

A large number of supporting members 45 are attached to the base 21 of the illustrated stage, and each supporting member 45 is provided with a vertical moving member 46 driven by a cylinder. A clamp piece 47 for clamping the workpiece W with the gauge portion 46 a is openably and closably attached to each vertical movement member 46, and each clamp piece 47 is opened and closed by a clamp cylinder 48. FIG.
In the figure, the positions where these clamp pieces 47 are provided are schematically indicated by hatching. Also, in FIG.
Work Wa indicated by virtual points and work W indicated by broken lines
b is shown, and each of the workpieces Wa and Wb is attached to the base 21 by any one of a large number of clamp pieces 47.
Fixed to

A procedure for transporting a work using the above-mentioned clamp device will be described. The work W is carried into the carry-in stage shown in FIG. 4 by a carrying device or manually. At that time, the sill clamp arm 29 and the work receiving portion 41 are lowered to predetermined positions by the cylinders 30 and 32, respectively. The clamp pieces 47 are opened by the cylinders 48. Under this state, the work W is placed on the gauge portion 46a, the clamp piece 47 is closed by the cylinder 48, and the work piece is clamped by the clamp piece 47 and the gauge portion 46a.

Thereafter, this work W is attached to the shuttle bar 2
In order to convey to the next stage by 4 and 25, the sill clamp arm 29 and the receiving seat 28 are raised by the cylinder 26, the work receiving portion 41 is raised, and the work W is clamped by the sill clamp arm 29. Then, the clamp pieces 47 are opened, and the respective clamp pieces 4 are
7 is lowered. As a result, the sill portion S of the work W is fastened by the sill clamp arm 29, and the work W is supported by the work receiving portion 41 of the support rod 40 from below in the central portion. Under that condition, two shuttle bars 2
4 and 25 are conveyed forward, and the work is conveyed to the next stage. At the next stage, the work W is changed from being supported by the shuttle bars 24 and 25 to the vertical movement member 46 provided on that stage.

As described above, since the sill portion S of the body side panel W is clamped and the lower surface center portion of the panel W is supported and the work is carried by the shuttle bar, that is, the carrying member, a plurality of works are carried. Among them, the sill portion having a common shape can be clamped, and the other portion can be supported and transported. By adjusting the vertical position of the support rod, it is possible to hold many types of work, and even when a new type of work is transported due to a model change of the vehicle body shape, the vertical direction of the support rod of the support unit By adjusting the position, it is possible to easily adjust the holding of a new work.

[0015]

As described above, according to the present invention, the sill portion having a common shape is clamped, and the lower surface of the central portion of the panel material is supported from below to be held by the conveying member. Therefore, a plurality of types of body side panels having different shapes can be held by the transport member without changing the structure.

[Brief description of the drawings]

FIG. 1 is a front view showing a work holding device according to an embodiment of the present invention,

2 is a plan view, FIG.

FIG. 3 is a view in the direction of the arrow along line 3-3 in FIG.

FIG. 4 is a schematic plan view showing a body side assembling process,

FIG. 5 is a front view showing a conventional work holding device.

[Explanation of symbols]

21 ... Base, 24, 25 ... Shuttle bar (conveying member), 26 ... Cylinder, 29 ... Sill clamp arm (clamping means), 31 ... Support unit, 32 ... Cylinder,
40 ... Support rod, 41 ... Work receiver, W, Wa, Wb
… Body side panel, S… Sill part.

Claims (1)

(57) [Claims] 1. A work holding device, which is attached to a carrying member for carrying a body side panel having a sill portion formed on one side thereof and supports the body side panel, wherein the sill portion is clamped to the carrying member. A sill clamp means is attached so as to be movable up and down, and a plurality of support rods for supporting the panel from the lower surface at the center portion in the width direction are attached to the conveying member so as to be movable vertically. apparatus.