JPS6322068Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tool for extracting a shank that connects a welding machine gun and an electrode tip.

[Prior art]

Conventionally, the shank that connects the gun of a welding machine and the electrode tip can be damaged or worn out due to impact during welding, collision with the workpiece, etc., and it is not necessary to replace the shank each time. It is being done. And when replacing the shank,
The shank is removed from the gun by loosening the adapter using a tool such as a pipe wrench or hammer.

[Problem that the invention attempts to solve]

However, the shank has a tapered part that fits into the gun and is firmly fixed, so it is not only time-consuming to remove the shank, but also difficult to remove from the gun when loosening the adapter with a tool such as a pipe wrench or hammer. This causes problems such as deformation of the welding point and shifting of the welding point position, reducing the quality of the welded product.

This invention was made to solve the above-mentioned problems, and its purpose is to connect a ratchet trench and a pipe wrench with a hollow screw mechanism, and to apply force in the direction of rotation as well as in the direction of the rotation axis. Accordingly, it is an object of the present invention to provide a shank extraction tool for a welding machine that allows the shank to be easily extracted and does not deform the gun.

[Means for solving problems]

In order to achieve the above object, the welding machine shank extraction tool of the present invention has a structure in which a bulge is formed at one end of the first gripping member, and the welding machine shank is supported on the bulge. A ratchet trench is formed with a polygonal fitting portion to be fitted into the adapter, a claw piece is formed at the tip of the second gripping member, and a pin is attached near the tip of the second gripping member. A substantially arc-shaped clamping member is rotatably supported, one end of which is connected to a spring attached to the second gripping member, and the other end facing the claw piece of the second gripping member. a pipe wrench provided with a claw piece, a cylindrical first screw member is provided in the fitting portion of the ratchet trench, and the first threaded member is provided in the claw piece of the second gripping member of the pipe wrench.
By providing a cylindrical second screw member that is screwed into the screw member, the distance between the ratchet trench and the pipe wrench in the direction of their rotation axis changes in conjunction with relative rotation between the two. Features.

[Effect]

When the fitting part of the ratchet trench is fitted to the adapter of the welding machine and its rotation is restricted, when the shank of the welding machine is held between the pair of claws of the pipe wrench and rotated, the shank will rotate. At the same time, the adapter is pulled out in the axial direction with respect to the adapter by the first and second screw members, and can be easily removed.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a top perspective view of a welding machine shank extraction tool according to the present invention, FIG. 2 is a bottom perspective view of a welding machine shank extraction tool according to the present invention, and FIG. 3 is a welding machine according to the present invention. FIG. 3 shows a perspective view of how the shank extraction tool is used. In FIGS. 1 to 3, 1 is a Rachiets trench,
This ratchet trench 1 has a bulge 3 formed at one end of a gripping member 2, which is a first gripping member.
A fitting part 4 is provided at the center of the bulging part 3 and is fitted into an adapter C that is fixed to the tip of the gun A and supports the shank B. Further, a cylindrical body 5 which is a first screw member having a through hole (not shown) with a diameter larger than that of the fitting part 4 is fixed to the upper surface of the bulging part 3, and a screw 6 is attached to the outer peripheral surface of the cylindrical body 5. is formed. The fitting portion 4 of the bulging portion 3 and the through hole of the cylindrical body 5 communicate with each other. Further, a pipe wrench 7 is disposed above the ratchet trench 1, and the pipe wrench 7 has a gripping member 8, which is a second gripping member, and a claw piece 9 is formed at the tip thereof.
Further, an insertion hole 10 is formed near the tip of the gripping member 8, and the clamping member 1 is inserted into this insertion hole 10.
1 is inserted therethrough and is rotatably supported by a pin 12. A spring 14 held by a pin 13 on the gripping member 8 is hooked to one end of the clamping member 11, and a claw piece 15 opposite to the claw piece 9 of the gripping member 8 is provided at the other end. ing. Further, a cylindrical member 16 that is a second screw member is fixed to the lower surface of the tip of the gripping member 8, and a screw (not shown) that is screwed into the screw 6 of the cylindrical body 5 is attached to the inner circumferential surface of the cylindrical member 16. is formed. The claw pieces 9 of the gripping member 8 and the claw pieces 15 of the clamping member 11 protrude inward from the inner diameter of the cylindrical member 16, forming an arc.

The cylindrical member 16 of the pipe wrench 7 is screwed into the cylindrical body 5 of the ratchet trench 1 by a screw mechanism, so that both wrenches 1 and 7 rotate relative to each other.

The operation of the welding machine shank extraction tool constructed as described above will be explained with reference to FIG.

Open the claw piece 15 of the clamping member 11 that constitutes the pipe wrench 7 against the spring, insert it into the shank B of the gun A from the fitting part 4 side of the ratchet trench 7, and fix it to the tip of the gun A. Attach the fitting part 4 of the ratchet trench 1 to the adapter C that is
mate.

Thereafter, the shank B is clamped by the claw piece 9 formed at the tip of the gripping member 8 of the pipe wrench 7 and the claw piece 15 provided at the tip of the clamping member 11, and the gripping member of the pipe wrench 7 Rotate 8 in the direction of the arrow. As a result, due to the action of the screw mechanism between the cylindrical body 5 of the ratchet trench 1 and the cylindrical member 16 of the pipe wrench 7, the pipe wrench 7 is rotated in the rotational direction and lifted in the axial direction, and the shank B is moved in the rotational direction. A force acts simultaneously in the axial direction, and the adapter C is rotated and pulled out.

[Effect of idea]

As explained above, in the welding machine shank extraction tool of the present invention, the ratchet trench and the pipe wrench are connected by a screw mechanism, and when replacing the shank, force is applied in the axial direction as well as in the rotational direction. Since the shank is made to work, the shank can be pulled out by pulling it out from the adapter provided at the tip of the gun, which has the effect of making it easy to remove the shank.

In addition, by easily removing the shank, it is possible to prevent the gun from deforming, so the welding point position does not shift during welding, and this has the effect of reducing the occurrence of welding defects on the workpiece. There is.

Furthermore, in this invention, since the ratchet trench and pipe wrench are connected by a screw mechanism, replacement work can be easily carried out in a narrow space, which has the effect of improving safety. .

[Brief explanation of drawings]

FIG. 1 is a top perspective view of a welding machine shank extraction tool according to the present invention, FIG. 2 is a bottom perspective view of a welding machine shank extraction tool according to the present invention, and FIG. 3 is a welding machine according to the present invention. FIG. 3 is a perspective view showing how the shank extraction tool is used. DESCRIPTION OF SYMBOLS 1... Ratchet trench, 2... Gripping member (first grasping member), 3... Swelling part, 4... Fitting part,
5... Cylindrical body (first screw member), 6... Screw,
7... Pipe wrench, 8... Gripping member (second grasping member), 9... Claw piece, 10... Insertion hole, 11...
...Holding member, 12...Pin, 13...Pin, 14
... Spring, 15 ... Claw piece, 16 ... Cylindrical member (second screw member), A ... Gun, B ... Shank, C ... Adapter.

Claims (1)

[Scope of utility model registration request] a ratchet trench in which a bulge is formed at one end of the first gripping member, and a fitting portion to which an adapter for supporting a shank of a welding machine is fitted is formed in the bulge; A claw piece is formed at the tip of the member, and a substantially arc-shaped clamping member is rotatably supported by a pin near the tip of the second gripping member, and one end of the clamping member and the second gripping member are rotatably supported by a pin. a pipe wrench on which a spring is hung, and a pipe wrench having a claw piece opposite to the claw piece of the first gripping member at the other end; A screw member is provided, and a cylindrical second screw member that is screwed into the first screw member is provided on the claw piece of the second gripping member of the pipe wrench. A tool for extracting a shank for a welding machine, characterized in that the distance between the two in the rotation axis direction changes in conjunction with the relative rotation of the two.