JPH0435075Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The invention is a method for conveying a roof panel onto the main body in the automobile body assembly process.
The present invention also relates to a workpiece conveyance device for positioning.

[Conventional technology]

In the automobile body assembly process, after transporting and placing the roof panel on the main body, in order to join them together by spot welding, first,
As shown by the one-dot chain line in FIG. 4, the roof panel A at the work clamp position A is clamped by the toggle clamp 2 installed on the lower surface of the surface plate 1 which is supported so as to be movable horizontally and vertically. Next, the surface plate 1 that has clamped the roof panel A is raised and then moved horizontally, and the roof panel A is moved to the main body B that has been transported to the workpiece unclamping position B.
position above. Next, by lowering the surface plate 1, the roof panel A is attached to the main body B.
(the state shown by the solid line in Figure 4). Then, use the toggle clamp 2 to attach the roof panel A.
While still clamped, the roof panel A is joined to the upper surface of the main body B by spot welding. After that, after releasing the clamping of the roof panel A by the toggle clamp 2, the surface plate 1 is returned to the workpiece clamping position A, and the above operation is repeated thereafter.

In addition, when transporting the roof panel A by the above method, the means for supplying power such as high pressure air or electric power to the toggle clamp 2 when clamping and unclamping the roof panel A is provided at the clamp position A and the unclamp position B. In addition to disposing the power supply devices 3 and 4 respectively, a power receiving device 5 is provided protruding from the outer periphery of the surface plate 1, and the power supply device 3 or 4 and the power receiving device 5 are connected at the above two positions. By coupling these, power is supplied to the toggle clamp 2, and power is not supplied to the toggle clamp 2 while the roof panel is being conveyed as the surface plate 1 moves.

[The problem that the idea aims to solve]

As mentioned above, when the roof panel A is conveyed by the surface plate 1 having the toggle clamp 2, if power is supplied to the toggle clamp 2 only at two positions, clamp position A and unclamp position B, it is possible to maintain a stable position. There is no need for the surface plate 1 to drag the air hose or power cable for power supply to the toggle clamp 2 during conveyance of the roof panel A by moving the panel 1, and troubles such as damage to the air hose or power cable can be prevented. However, the number of vehicles assembled through the body assembly process is not just one model.
In the case of multiple car models, the overall height of Main Day B may vary depending on the car model. If the overall height of the main body B changes, the lowering stop position of the surface plate 1 at the unclamping position B will naturally change depending on the type of vehicle. Therefore, in this case, it is necessary to change the position of the power supply device 4 in the height direction according to the change in the lowering stop position at the unclamp position B. However, if the power supply device 4 is moved up and down, , its structure becomes very complex,
There was a problem in that this led to an increase in costs and at the same time, the failure rate of this part was extremely high.

Furthermore, as described above, when the roof panel A is clamped only by the toggle clamp 2, the vehicle body structure is changed to the roof reinforcement C, which is pre-installed on the roof panel A side, as shown in FIG. If spot welding of A to main body B is performed only on both sides of roof panel A, no particular problem will occur because the front and rear sides of roof panel A can be clamped using toggle clamps 2. As shown in the figure, a roof reinforcement C is installed on the main body B side, and when spot welding is to be performed around the entire circumference of the roof panel A, the roof panel A is clamped with the toggle clamp 2. In the current state, there was a problem in that the roof panel A could not be placed on the upper surface of the main body B, and the above method could not be used.

As a solution to the above problem, see Figures 7 and 8.
As shown in the figure, a vacuum cup 6 is installed on the bottom surface of the surface plate 1 outside the toggle clamp 2, and when the roof panel A is positioned directly above the main body B, the clamp by the toggle clamp 2 is temporarily released. There are ways to do this. That is, until the roof panel A is transported directly above the main body B,
The roof panel A is held by both the toggle clamp 2 and the vacuum cup 6, and when it reaches this position, as shown in FIG. While holding the roof panel A, the surface plate 1 is lowered in this state, and the roof panel A is placed on the upper surface of the main body B. In this state, as shown in FIG.
At the same time, the roof panel A is clamped together with the roof reinforcement C again by the toggle clamp 2, and the roof panel A
After positioning and holding the roof panel A on the upper surface of the main body B, the roof panel A is fixed to the main body B by spot welding. However, if the above method is adopted, power must be supplied to the toggle clamp 2 in two positions: when the roof panel A is directly above the main body B, and when it is placed on the top surface of the main body B. In this case as well, the problem arises that the power supply device 4 must be moved up and down. In addition, if the roof panel A is not held only by the vacuum cup 6,
This is because it is dangerous to hold the roof panel A only by the suction force of the vacuum cup 6 when transporting the roof panel A.

Furthermore, when it is desired to run many types of vehicles having the two types of body structures shown in FIGS. 5 and 6 above on one production line, the above-mentioned problems become even more prominent. Become.

[Means to solve the problem]

A workpiece transfer device is supported by a surface plate that is horizontally and vertically movable between a workpiece clamp position and a workpiece unclamp position, and is supported at the bottom of the surface plate so that it can be raised and lowered by a lifting cylinder. A sub-surface plate, a toggle lamp and a vacuum cup for holding the workpiece installed on the underside of the sub-surface plate, a power supply device fixed to the workpiece clamp position and workpiece unclamping position, and a power supply device protruding from the outside of the surface plate. ,
This device is connected to a power supply device at the workpiece clamp position and the workpiece unclamp position, and includes a power receiving device for supplying power from the power supply device to the toggle clamp and the vacuum cup.

[Effect]

As described above, by supporting the sub-surface plate having the toggle clamp and the vacuum cup at the bottom of the surface plate so as to be able to move up and down, the toggle clamp and the This allows the vacuum cup to be moved up and down.

〔Example〕

FIG. 1 shows a workpiece conveyance device according to the present invention. In the figure, 10 is a surface plate that is supported movably in the horizontal and vertical directions, 11 is a sub-surface plate that is supported below the surface plate 10 via a guide rod 12 so that it can be raised and lowered, and 13 is a sub-surface plate. In order to raise and lower the board 11, it is a lifting cylinder installed on the surface plate 10, and the piston rod tip of this lifting cylinder 13 is connected to the sub-surface plate 11. 1
4 is a toggle clamp installed on both sides of the lower surface of the sub-surface plate 11, and 15 is a vacuum cup installed at a position slightly closer to the center of the lower part of the sub-surface plate 11. Reference numerals 16 and 17 refer to power supply devices fixedly installed at the workpiece clamping position A and unclamping position B, respectively. Reference numeral 18 indicates a power supply device installed on the side of the surface plate 10 in order to introduce the power from the power supply devices 16 and 17 into the surface plate 10. This is a protruding power receiving device, and the power introduced into the surface plate 10 by this power receiving device 18 is transmitted through a short air hose, a power cable ( toggle clamp 14 installed on the bottom surface of the sub-surface plate 11 via a
and a vacuum cup 15. In the case of this device, the fixed position of the power supply device 17 at the unclamping position B is such that the roof panel A held by the toggle clamp 14 and the vacuum cup 15 of the sub-surface plate 11 in the raised position is in the main position. A point located slightly above the body B is set at a position where it can be connected to the power receiving device 18. Reference numeral 19 denotes a through hole drilled in the periphery of the surface plate 10, and this through hole 19 is fixed near the power supply devices 16 and 17 when the surface plate 10 is located at the clamp position A and the unclamp position B. By fitting the positioning pins 20 and 21 into the through holes 19, the surface plate 10 is positioned at the clamp position A and the unclamp position B. It is designed so that

In the above configuration, in order to transport the roof panel A onto the main body B having the roof reinforcement C as shown in FIG. 6 using the work transport device according to the present invention, first, the work clamp is Place plate 1 directly above roof panel A at position A.
0 position, and the power receiving device 18 protruding from the side of the surface plate 10 is connected to the power supplying device 16. In this state, the lifting cylinder 13 is shortened and the sub-surface plate 11 is positioned at the rising end. Then, the roof panel A
is held below the sub-surface plate 11 (the state shown in FIG. 1). Next, the sub surface plate 11 is raised together with the surface plate 10, and then moved horizontally to position the roof panel A above the main body A located at the work unclamp position B. Next, when the surface plate 10 is lowered, the lowering of the surface plate 10 stops at a point where the roof panel A is located slightly above the main body B, and the positioning pin 21 is inserted into the through hole 19 provided in the surface plate 10. They are fitted, and the surface plate 10 is positioned at the workpiece clamp position B, and the power receiving device 18 is coupled to the power supplying device 17. And in this state,
First, as shown in FIG. 2, after releasing the clamp of the roof panel A by the toggle clamp 14 and holding the roof panel A only by the vacuum cup 15, the lifting cylinder 13 is extended and the sub-surface plate 11 is lowered. By doing so, the roof panel A held only by the vacuum cup 15
Place it on the top surface of main body B. Next, at the same time as the suction by the vacuum cup 15 is released, the roof panel A is again clamped together with the roof reinforcement C by the toggle clamp 14, and the roof panel A is positioned and held on the upper surface of the main body B (see Fig. 3). situation). Next, in this state, the roof panel A is fixed to the main body B by spot welding, and after that, the clamping of the roof panel A by the toggle clamp 14 is released, the lifting cylinder 13 is shortened, and the sub surface plate 1 is
1, the surface plate 10 supporting the sub-surface plate 11 is moved to the clamp position A, and the above operation is repeated thereafter.

In addition, when the above-mentioned conveyance device conveys the roof panel A having the roof reinforcement C to the upper surface of the main body B as shown in FIG. 5, the roof panel A is held only by the toggle clamp 14. do it. In addition, changes in the height of the main body B caused by changes in the type of vehicle transported to the workpiece unclamping position B are responded to by raising and lowering the sub-surface plate 11 by extending and contracting the lifting cylinder 13. , a surface plate 10 having a power supply device 17 and a sustained power receiving device 18
is always positioned at the workpiece unclamp position B.

[Effect of idea]

As described above, the present invention supports a sub-surface plate having a toggle clamp and a vacuum cup at the bottom of the surface plate so as to be able to move up and down, thereby eliminating the need to move the surface plate having the power receiving device connected to the power supply device. Since it is possible to move the toggle clamp and vacuum cup up and down, when a roof panel is placed on a main body with roof reinforcement, or when the vehicle model changes, the main body transported to the workpiece unclamping position can be Even when the height of the body changes, it is possible to always keep the lowering stop position of the surface plate at the unclamping position constant. Therefore,
The roof panel can be placed on the main body under the above conditions without moving the power supply device up and down at the unclamped position, and all problems caused by moving the power supply device up and down can be solved.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a workpiece conveyance device according to the present invention, FIGS. 2 and 3 are diagrams showing the operating state of the workpiece conveyance device according to the present invention at an unclamping position, and FIG. 4 is a diagram showing the workpiece conveyance device according to the present invention. Figures 5 and 6 are perspective views showing examples of the structure of the roof panel and the main body, and Figures 7 and 8 are drawings showing a conventional example.
The figure is a diagram showing another conventional example of a workpiece conveyance device. 10...Surface plate, 11...Sub-surface plate, 13...Lifting cylinder, 14...Toggle clamp, 15...
... Vacuum cup, 16, 17... Power supply device, 18... Power receiving device, A... Work clamp position, B... Work unclamp device.

Claims (1)

[Scope of utility model registration request] A surface plate supported to be horizontally and vertically movable between a work clamp position and a work unclamp position, and a sub surface plate supported at a lower part of the surface plate so as to be movable up and down by a lifting cylinder; A toggle lamp and a vacuum cup for holding the workpiece are installed on the lower surface of the sub-surface plate, a power supply device is fixedly installed at the workpiece clamping position and the workpiece unclamping position, and a power supply device is installed on the outside of the surface plate and is installed at the workpiece clamping position and the workpiece unclamping position. 1. A work transfer device comprising: a power receiving device coupled to a power supply device at a workpiece unclamping position for supplying power from the power supply device to the toggle clamp and the vacuum cup.