JP3893044B2 - Actuating device for burr clamp for fixing jig plate of workpiece carriage - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an operating device for a burr clamp for fixing a jig plate of a work conveyance carriage that carries a work such as an underbody constituting a vehicle body and moves along an assembly line.
[0002]
[Prior art]
A plurality of jigs for positioning a workpiece are disposed on a workpiece conveyance carriage that mounts a vehicle body component workpiece such as an underbody and moves on an assembly line. These jigs are generally fixed to a work conveyance carriage, and the whole carriage is a dedicated product for each type of work.
[0003]
[Problems to be solved by the invention]
The number of trolleys used in the automobile body assembly line is very large, and the cost of the trolleys accounts for a significant portion of the initial capital investment. In particular, in a multi-vehicle assembly line, since the number of types of carts used increases, the cost increases accordingly. However, only the positioning jig disposed on the carriage is a dedicated article for the vehicle type among the components of the carriage, and the base of the carriage can be shared by other vehicle types.
SUMMARY OF THE INVENTION An object of the present invention is to provide a simple and low-cost detachable structure for a jig plate mounted on a base while making the base of a work transport carriage shared.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, an operating device for a burr clamp for fixing a jig plate of a workpiece conveying carriage according to the present invention is equipped with a plurality of jig plates with jigs for positioning a workpiece such as a vehicle body and assembling the workpiece Actuating device for a plurality of burr clamps arranged on a side edge portion of the workpiece conveyance carriage for fixing the jig plate corresponding to the jig plate mounting position of the workpiece conveyance carriage movable along the line And an engagement fitting having an U-shaped opening reciprocated by the actuator disposed on the assembly line side of the jig plate on the assembly line, and when the workpiece transport carriage moves, An engagement fitting disposed so that the tip of the operation lever of the burr clamp can pass through the inside of the U-shaped opening, and the operation of the burr clamp is disposed inside the U-shaped opening. Characterized in that to perform the clamping or unclamping operation of the burr clamp by actuating the actuator in a state that put the tip of the lever.
[0005]
The workpiece conveying carriage loaded with the jig plate is moved to the position where the jig plate is attached and detached, and the vari clamp of the carriage is closed by the actuator to fix the jig plate to the carriage. When exchanging the jig plate on the carriage when the production vehicle type is switched (stage change), the carriage is moved again to the jig plate attachment / detachment position, and then the vari clamp is opened by the actuator to remove the jig plate. The jig plate is preferably divided into a plurality of segments so that it can be easily handled by a general-purpose robot or the like, and in order to minimize the changeover cost.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a work transfer carriage 1 has a plurality of wheels 2 and a base 4 that can run on a pair of left and right rails 3, and a general-purpose robot on the base 4 as shown in FIGS. 2 and 3. 5 has a plurality of jig plates 6 detachably mounted. A plurality of jigs 7 for positioning a workpiece W such as an underbody are fixed on each jig plate 6. A plurality of burr clamps 8 as shown in FIGS. 1, 4, and 5 are arranged on the left and right side edges of the base 4 corresponding to the mounting positions of the jig plate 6. These burr clamps 8 are for fixing the jig plate 6 by sandwiching the left and right end edges of the jig plate 6 between the base plate and the base plate. A clamp lever 14 rotatable around a pin 13 supported at the tip of the bracket 12, an operation lever 16 rotatable around another pin 15 supported at an intermediate portion of the bracket 12, and an operation with the clamp lever 14. The lever 16 includes a link plate 19 that connects intermediate portions of the lever 16 via pins 17 and 18.
[0007]
Actuators 24 driven by an air cylinder 23 are arranged on both sides of the assembly plate on the assembly line, as shown in FIG. The actuator 24 is attached to the upper end of an inclined column 25 that is inclined outwardly on the opposite side of the carriage 1, and a U-shaped engagement fitting 26 connected to the piston rod of the air cylinder 23 is used to operate the vari clamp 8. The lever 16 extends to the vicinity of the tip. Then, when the air cylinder 23 is extended and operated with the tip of the operation lever 16 inserted into the U-shaped opening 27 of the engagement fitting 26 as shown in FIG. 4, the clamp lever 14 of the burr clamp 8 moves in the direction of the arrow in FIG. And the upper surface of the edge of the jig plate 6 is pressed. Further, when the air cylinder 23 is shortened and the tip of the operation lever 16 of the vari clamp 8 in the closed state is put in the U-shaped opening 27 of the engagement fitting 26 as shown in FIG. The clamp lever 14 is rotated in the direction of the arrow in FIG. 5 so that the jig plate 6 can be removed.
[0008]
The work conveyance carriage 1 is configured as described above, and the jig plate 6 is attached and detached as follows. First, as shown in FIG. 2, a plurality of jig plates 6 corresponding to the production vehicle type are mounted on the base 4 using a robot or the like, and the actuator 24 of FIG. Move to the specified position. At this time, the engagement fitting 26 of the actuator 24 stands by at the position of the chain line in FIG. 4, and the tip of the operation lever 16 of the vari clamp 8 enters from the side of the opening 27 of the engagement fitting 26. When a sensor (not shown) detects that the workpiece transport carriage 1 has moved to a predetermined position, the air cylinder 23 is extended and the engagement fitting 26 moves in the direction of the arrow in FIG. As a result, the operation lever 16 of the burr clamp 8 is rotated upward in FIG. 4, and at the same time, the clamp lever 14 is pushed by the link plate 19 and is rotated in the direction of the arrow. The engagement fitting 26 finally moves to the chain line position in FIG. 5 and returns to the solid line position after pressing the tip of the clamp lever against the upper surface of the edge of the jig plate 6. By performing the clamp operation of all the toggle clamps in the same manner as described above, the jig plate 6 is fixed to the base, and the workpiece W such as an underbody can be positioned and mounted on the jig plate 6.
[0009]
Next, when the burr clamp 8 is opened for exchanging the jig plate 6, the workpiece conveying carriage 1 is moved again to the position shown in FIG. 1, and the opening of the engagement fitting 26 waiting in the solid line position as shown in FIG. The tip of the operation lever 16 of the vari clamp 8 is inserted from the side, and the air cylinder 23 is shortened to open the vari clamp 8 as shown in FIG. The jig plate 6 can now be removed, and the jig plate 6 is replaced using the robot 5 as shown in FIG.
[0010]
Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above embodiment, the vari clamp 8 is opened and closed by the actuator 24. It is also possible to open / close the vari clamp 8 by a robot instead of 24. Further, a plurality of actuators 24 may be arranged corresponding to the number of vari clamps 8 to open and close the plurality of vari clamps 8 at the same time, and the number of actuators is minimized in order to reduce equipment costs. All the burr clamps 8 may be opened and closed while the work conveyance carriage is moved intermittently on the side of the actuator 24.
[0011]
【The invention's effect】
In the present invention, since the jig plate is detachably mounted on the carriage as described above, it is possible to cope with the change of multiple workpieces by simply sharing the carriage base and replacing the jig plate. Replacement costs can be reduced. In addition, since a plurality of burr clamps for fixing the jig plate arranged on the edge of the carriage are opened and closed by an actuator arranged on the side of the jig plate attachment / detachment position, a burr clamp driving means is provided on each conveyance carriage. There is no need to dispose, and the cost of the cart can be reduced.
[Brief description of the drawings]
FIG. 1 is a front view of a workpiece transfer carriage according to the present invention.
FIG. 2 is a perspective view of a work conveyance carriage when a jig plate is mounted.
FIG. 3 is a plan view of a workpiece transfer carriage.
FIG. 4 is a side view of the burr clamp in an open state.
FIG. 5 is a side view of a burr clamp in a closed state.
[Explanation of symbols]
1 Work transport carriage 3 Rail 4 Base 5 General-purpose robot 6 Jig plate 7 Jig 8 Vari clamp 24 Actuator W Work

Claims (1)

Mount jig plates with jigs for positioning workpieces such as car bodies, and fix the jig plates corresponding to the jig plate mounting position of the workpiece conveyance carriage that can move the workpieces along the assembly line. Therefore, in a plurality of burr clamp actuating devices arranged on the side edge of the work conveyance carriage, an actuator arranged on the side of the attachment / detachment position of the jig plate on the assembly line and reciprocated by the actuator An engagement metal fitting having a U-shaped opening, the engagement metal fitting being arranged so that the tip of the operation lever of the vari clamp can pass through the inside of the U-shaped opening when the work transport carriage moves. And operating the actuator with the tip of the operation lever of the burr clamp inside the U-shaped opening. Jig plate fixing burrs clamp actuator workpiece transfer carriage, characterized in that to perform the clamping operation.

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