JPH0244942Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a welding holder, and particularly to a long hand welding holder.

[Prior art and its problems]

For long hand welding currently used in the steel frame, bridge and shipbuilding industries, rod diameter 6 is used, depending on the welding leg length.
A long rod with a large outer diameter of m/m to 7 m/m is used. This manual welding is the most basic welding method, has a very wide range of uses, and is indispensable in the fields of steel frames, bridge roofing, and shipbuilding.

However, when performing continuous manual welding, the welding holder used by the welding operator is forced to temporarily stop the welding operation or replace it with another holder due to the welding heat and fume gas generated during the welding operation. . In addition, it has been observed that the grip of the welding holder sometimes overheats, resulting in burns to the welding operator. Furthermore, the life of the welding holder is shortened due to the effects of heat, and in some cases, cooling with water, which is taboo for welding, has to be used, which further causes the problem of premature damage to the welding holder.

On the other hand, the fume gas generated during welding is harmful to the human body, and special measures must be taken to prevent inhalation of this gas.

[Purpose of invention]

The present invention focused on the above-mentioned problems of the conventional technology, and was developed with the aim of improving them.The heat zone of the welding holder is constantly air-cooled to prevent overheating, thereby preventing burns to the worker and preventing burns during welding. This prevents damage to the holder and greatly extends its service life, and also ensures hygiene by scattering fume gas away from the operator using the air exhaust required for air cooling. The present invention provides a welding holder that can be used for welding.

[Summary of the idea]

In order to achieve the above object, the present invention provides a welding holder in which a clamping rod is pivotally attached to a holder body to which a conducting wire is connected, and a welding rod is held by the holder body and a clamping part at the tip of the clamping rod for welding. A pressurized air supply path is connected to a grip tube made of an insulating heat-resistant material that is fitted onto the base of the holder body, and the inside of the grip tube is connected between the tip of the holder body and the tip cover that is covered with it. An air passage communicating with the air passage is formed in the tip cover, an exhaust hole communicating with the air passage is opened toward the front, and an exhaust hole facing downward is opened in the cover of the clamping portion of the clamping rod, and an exhaust hole of the cover is opened to the front. The hole communicates with the air passage through a passage formed by a notch or the like at the tip of the clamping part, and the pressurized air supplied into the grip tube cools the holder body while passing between the holder body and the tip cover. The present invention is characterized in that the fume gas is blown away by exhaust gas ejected from the exhaust hole.

[Example of idea]

Hereinafter, the present invention will be described with reference to embodiments shown in the drawings.

The welding holder 1 to which the present invention is directed has a sandwiching structure, and includes a holder body 2 made of a conductive material,
It has a clamping rod 3 that is pivotally attached to the holder body 2, and the welding rod is clamped between the clamping parts 4 and 5 of the holder body 2 and the clamping rod 3.

A conductor insertion hole 8 is formed in the base 6 of the holder main body 2, into which the conductor 7 is inserted in the axial direction from the base end thereof, and set screws 9, 9, . A required number of screw holes 10, 10, . . . into which the screws are screwed are formed in the radial direction.

On the top surface of the tip 11 of the holder body 2, air leak prevention walls 12, 1 are provided which are parallel to each other in the longitudinal direction.
2 are formed, and these prevention walls 12, 12 form an air passage 13 therebetween.

At the base ends of the air leak prevention walls 12, 12, an air leak prevention plate 14 is provided around the area excluding the air passage 13. End protrusion 15,1
A grip tube 16 made of a non-conductive and heat-resistant material is fitted over the outer peripheries of 5 and 15, and a set screw 17
It is fixed to the holder main body 2 by.

The conductive wire 7 is covered with a covering material 18 such as rubber with a required gap left around its outer periphery, and the gap is used as an air passage 19. This covering material 18
The end of the holder body 2 is connected to the base end of the grip tube 16 by being fitted externally, and the conductor 7 is connected to the base 6 of the holder main body 2 as described above.
It is inserted into the conductor insertion hole 8 of and fixed with set screws 9, 9, . . . .

A pressure air introduction pipe 20 is connected in the middle of the covering material 18, and supplies pressurized air into the grip tube 16 through the air passage 19 in the covering material 18, and
Air leak prevention walls 12, 12 pass through the outer surface of the base 6 of the
The air is supplied to the air passage 13 between the two.

The clamping rod 3 is pivotally attached to the lower surface of the tip 11 of the holder main body 2 by a shaft 21, and its gripping part 22 is covered with a non-conductive heat-resistant material,
The clamping part 5 of the clamping rod 3 is always pressed against the clamping part 4 of the holder main body 2 by the spring 23 .

The upper surface of the tip 11 of the holder body 2 is covered with a tip cover 24 made of heat-resistant resin and having a U-shaped cross section, and is fixed to the holder body 2 with set screws 25, 25. The upper ends of the air leak prevention walls 12, 12 are brought into contact with the inner surface of the upper surface of the tip cover 24, and the air passage 13 is formed.

An exhaust hole 26 is bored in the front end surface of the front end cover 24 at a position slightly shifted from left to right.

The lower surface of the clamping portion 5 of the clamping rod 3 is covered with a cover 27 also made of heat-resistant resin, and is fixed with a set screw 28. An exhaust hole 29 is bored in the bottom surface of the tip of this cover 27.
9 communicates with the air passage 13 of the clamping part 5 through a passage 13a such as a notch provided at the tip of the clamping part 4.

Next, the effect will be explained.

During welding, when the gripping part 22 of the clamping rod 3 is grasped, the gap between the clamping parts 4 and 5 opens against the force of the spring 23, and when the gripping part 3 of the clamping rod 3 is released while holding the welding rod, the force of the spring 23 opens the gap between the clamping parts 4 and 5. A welding rod is held between the holding parts 4 and 5. After this, electricity is supplied through the conducting wire 7 to perform welding work.

At this time, when pressurized air is simultaneously supplied through the pressurized air supply pipe 20, the pressurized air is supplied into the grip barrel 16 through the air passage 19 between the conducting wire 7 and the covering material 18, and passes between the protrusions 15, 15, 15. The exhaust hole 26,2
Exhaust from 9. During this time, the heat of the holder main body 2 is carried away by the air, preventing overheating, and the fume gas generated during welding is blown away from the worker by the exhaust air ejected from the exhaust holes 26 and 29. is prevented from inhaling hume gas.

[Effect of idea]

As explained above, the welding holder according to the present invention has a pressurized air supply path connected to a grip tube made of an insulating and heat-resistant material that is fitted over the base of the holder body, and a pressurized air supply path is connected to the grip tube made of an insulating and heat-resistant material that is fitted over the base of the holder body. forming an air passage communicating with the inside of the grip tube between the tip cover and the grip tube;
The tip cover and the cover of the clamping part of the clamping rod are provided with exhaust holes communicating with the air passage facing forward and downward, so that the pressurized air supplied into the grip tube can flow between the holder body and the tip cover. The holder body is cooled during the passage, and the fume gas is blown away by the exhaust emitted from the exhaust hole.
This prevents the welding holder from overheating even during continuous welding, which is essential for long fillet welding in various fields such as steel frames, bridge bridges, and shipbuilding. Since the gas is blown away, the safety of the worker can be ensured, and many effects can be obtained, such as extending the service life of the welding holder, preventing burns, and preventing the inhalation of harmful gases.

In the illustrated embodiment, pressurized air is supplied to the welding holder 1 using the air passage 19 around the conductor 7.
Although a case is shown in which pressurized air is supplied to the inside of the grip barrel 16, a separate system of pressure air supply pipe may be connected to the grip tube 16 to supply pressurized air. Further, the shape and structure of each part is not limited to the illustrated embodiment, and it goes without saying that the design can be changed as appropriate.

[Brief explanation of drawings]

FIG. 1 is an external perspective view showing an embodiment of a welding holder according to the present invention, and FIG. 2 is an exploded perspective view of the same. 1... Welding holder, 2... Holder body, 3...
Clamping rod, 4, 5... Clamping part, 6... Base, 7...
Conductor, 8... Conductor insertion hole, 12... Air leak prevention wall, 13... Air passage, 14... Air leak prevention plate, 15... Protrusion, 16... Grip tube, 18... Covering material, 19 ... Air passage, 20 ... Pressure air supply pipe, 23 ... Spring, 24 ... Tip cover, 26,
29...Exhaust hole, 27...Cover.

Claims (1)

[Scope of utility model registration request] In a welding holder in which a clamping rod is pivotally attached to the holder body to which the conductor is connected, and a welding rod is held and welded between the holder body and the clamping part at the tip of the clamping rod, the welding rod is fitted externally to the base of the holder body. A pressurized air supply path is connected to a grip tube made of an insulated heat-resistant material, and an air passage communicating with the inside of the grip tube is formed between the tip of the holder main body and a tip cover covered with the tip, and the An exhaust hole communicating with the air passage is opened in the tip cover facing forward, an exhaust hole facing downward is opened in the cover of the clamping part of the clamping rod, and the exhaust hole of this cover is formed by a notch or the like at the tip of the clamping part. The pressurized air supplied into the grip tube cools the holder body while passing between the holder body and the tip cover, and the exhaust gas ejected from the exhaust hole cools the holder body. A welding holder characterized by being designed to blow away.