JPH0214867Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ground connection device for a welding jig used primarily for welding the body of a two-wheeled motor vehicle.

Conventionally, as this type of welding means, a jig for removably holding a car body or other workpiece is provided movably at an upper workpiece setting position, a lower workpiece processing position, and a take-out position in front of the workpiece. A type of welding machine has been proposed in which a welding machine is provided on the side facing the workpiece so that arc welding or other welding is performed on the workpiece at the operating position, but in this case, the workpiece is not welded. Conventionally, in order to do this, the jig was generally provided with a ground wire extending longitudinally outward.In such a device, the ground wire was connected to the jig. This has the disadvantage of having to be carried along during movement, which hinders work and is likely to cause damage.

The purpose of the present invention is to obtain a device free of such inconveniences, in which a jig 1 for removably holding a workpiece a is placed at an upper workpiece set position A, and
In a device that is movably provided sequentially at a lower workpiece machining position B and a workpiece take-out position C in front of the workpiece machining position B, and the jig 1 is grounded at the workpiece machining position B, the jig 1 has a part protruding downward. A plug-shaped ground terminal 4 consisting of a plurality of insertion pieces whose protruding height gradually increases in the forward direction of the jig 1 is provided, and the plug-shaped ground terminal 4 is provided at the workpiece processing position B. 4 in the vertical direction of the jig 1 and protrude upward so as to separate in the forward direction of the jig 1, and the height of the protrusion gradually decreases in the forward direction of the jig 1. It is characterized by providing a socket-shaped earth terminal 6 consisting of a piece.

In the illustrated example, the jig 1 is in the form of a frame that surrounds the body of a two-wheeled motor vehicle or other work a, and has front and rear shafts 10, 10 attached to the lower end of a lifting frame 9 extending downward from an upper truck 8. It is of a rotatably supported type, so that it can be moved up and down on the elevating frame 9 and back and forth on the trolley 8. The jig 1 has stopper arms 11, 11 at its ends.
is provided, and is stopped at one position and the other position during the above-mentioned reversal by cooperation with the stopper members 12, 12.

Furthermore, in the illustrated example, the ground terminal 4 is shaped like a downward plug, and the ground terminal 6 is shaped like a socket that faces upward and is normally closed by a spring 6a. The terminals 6 are arranged in parallel in three tiers, and the terminals 6 are also arranged in parallel in three tiers at the front and rear. In addition, the three terminals 6 are formed in a step-like shape that gradually becomes shorter and shorter toward the front.

The three terminals 4 are to be grounded at three locations on the front and back on each side of the workpiece a through the three ground wires 3, and the welding machine 2 is connected to the three terminals on each side in parallel. shall be established.

To explain its operation, the jig 1 holding the workpiece a moves from the upper workpiece setting position A to the lower workpiece processing position B, and after welding the workpiece a at the position B, the jig 1 holds the workpiece a. The workpiece a will be removed after moving to the take-out position C, but during such movement, the ground terminal 4 on the jig 1 side and the ground terminal 6 on the machine base 5 side are mutually connected at the workpiece processing position B. The workpiece a is grounded through this to prepare for the above-mentioned welding, and when the jig 1 is moved forward, both terminals 4 and 6 are uncoupled in the front-rear direction. There is nothing to hinder this progress.

In this way, according to the present invention, the movable jig 1 is provided with a plug-shaped grounding piece consisting of a plurality of plug-like pieces that protrude downward and whose protruding height gradually increases in the direction in which the jig moves forward. A terminal 4 is provided at the workpiece processing position B, and the plug-shaped ground terminal 4 is engaged in the vertical direction of the jig and protrudes upward so as to be separated in the forward direction of the jig. Since the socket-shaped ground terminal 6 is provided with a plurality of clamping pieces whose length gradually decreases in the direction of advancement of the jig, it is easy to connect and disconnect the jig 1 to the ground at the workpiece processing position B. In addition, a plurality of insertion pieces and clamping pieces with different heights can be attached and removed at the same time, and the vertical insertion force and the forward removal force are applied to each insertion piece and clamping piece. It has the effect of being equivalent to a piece, being stable in strength, and durable for long-term use.

[Brief explanation of the drawing]

Figure 1 is an overall side view of one example of the proposed device;
The figure is an enlarged side view of the main part, Fig. 3 is a plan view thereof, Fig. 4 is a front view of a part thereof, Fig. 5 is an enlarged cross-sectional side view of the main part, and Fig. 6 is a front view thereof. It is. a...Workpiece, 1...Jig, A...Inactive position, B...Active position, C...Take-out position, 2...Welding machine, 3...Ground wire, 4...Ground terminal, 5...
...Machine base, 6...Ground terminal, 7...Ground wire.

Claims (1)

[Scope of utility model registration request] A jig 1 for removably holding a workpiece a is provided so as to be movable in sequence at an upper workpiece set position A, a lower workpiece processing position B, and a workpiece takeout position C in front of the jig 1, and at the workpiece processing position B. Jig 1
In the jig 1, there is provided a plug-shaped grounding piece consisting of a plurality of plug-like pieces that protrude downward and whose protruding height gradually increases in the direction in which the jig 1 moves forward. A terminal 4 is provided at the workpiece processing position B, and the plug-shaped ground terminal 4 is engaged in the vertical direction of the jig 1 and protrudes upward so as to be detached in the forward direction of the jig 1, so that the protrusion height is increased. A grounding connection device for a welding jig, characterized in that a socket-shaped grounding terminal 6 is provided with a plurality of clamping pieces whose length gradually decreases in the direction of advancement of the jig 1.