WO2010131793A1

WO2010131793A1 - Welding electrode holder

Info

Publication number: WO2010131793A1
Application number: PCT/KR2009/003138
Authority: WO
Inventors: 정숙희
Original assignee: Jung Sook-Hee
Priority date: 2009-05-13
Filing date: 2009-06-11
Publication date: 2010-11-18
Also published as: KR100921485B1

Abstract

The present invention relates to a welding electrode holder which facilitates the connection of a cable to the welding electrode holder by having the structure of including a pressing means for pressing a cable against a cable connection section provided on one side of a body. The welding electrode holder comprises a cable connection section formed with a gripper on one end thereof for gripping a welding electrode and coupled with a cable on the other end; and a pressing means inserted into the cable connection section to press the cable while the cable is inserted. The cable connection section has a female threaded hole formed in the advancing direction of the cable, a receiving space of a predetermined depth, and branch protrusions protruded to a predetermined height having a distance on both sides thereof from the bottom surface of the receiving space to enable cable lines, while being branched, to be folded on the bottom surface of the receiving space and distributed. The pressing means has a male thread formed on the outer periphery of one end thereof so as to be coupled into the female threaded hole of the cable connection section and an insertion hole formed in the middle thereof for inserting the cable, and includes: a pressing section having a leading end surface, which is formed on the leading end which is in the direction that the pressing means enters into the welding electrode holder, for pressing the cable lines distributed in a foldable state on the bottom surface; and a grasping section coupled with the opposite end of the pressing section for simple grasping by a user.

Description

[Revision 19.08.2009 by Rule 26] 26 Welding Rod Holder

The present invention relates to a electrode holder, and more particularly to a structure of a electrode holder that is easy to connect the cable to the electrode holder by having a structure including a pressing means for pressing the cable to the cable connection portion provided on one side of the body. will be. The present invention also relates to an electrode holder having improved risk of an electric shock accident by discharging by eliminating the configuration of metallic connecting elements between the body and the insulating handle.

In general, an arc refers to an arc-shaped flame having strong light and high heat formed by electric discharge when a voltage is applied between the electrode and the base material and the tip of the electrode is lightly contacted with the base material. Arc welding is to join parts together by melting the welded part of the base material using the heat by the arc, and then adding the volume of the filler metal to the welded part.

As shown in FIG. 1, the body 1 of a conventional electrode holder 20 widely used for arc welding includes a welding rod claw portion 2, a forceps coupling portion 3, and a cable connection portion 4. . The welding rod clamp 2 is formed such that the welding rod clamp groove 2a on which the welding rod is bitten is formed on the upper surface and the bolt fastening hole 2b to which the insulating cover fixing bolt 6 is fastened penetrates between the upper and lower surfaces. In addition, the tong coupling portion 3 is formed by protruding the tong coupling piece (3a) is hinged to the welding rod clamp to the upper surface of the front end portion of the bolt fastening hole (3b) is fastened to the insulating cover fixing bolt (7) It is formed to penetrate the lower surface. In addition, the cable connection part 4 has a bolt fastening hole 4a through which an insulating handle and a fastening bolt 8 is fastened at a front end thereof, and a cable insertion groove 4b is formed in a longitudinal direction at a rear end thereof. The bolt fastening hole 4c to which the fastening bolt 9 for cable connection is fastened is formed to pass therethrough.

In addition, an insulation cover 10 is installed by the insulation cover fixing bolts 6 and 7 at the lower portion of the welding rod claw portion 2 and the forceps coupling portion 3 of the body 1 and the forceps coupling portion 3. An insulating cover 11 is installed on one side of the upper surface of the tongs support coil spring, and an insulating cover 12 is provided on the tongs engaging piece 3a formed on the upper part of the tongs coupling part 3 of the body 1. ) Is installed and the welding rod pliers 14, which is provided with an insulation lever 13 for releasing the welding rod at the rear end, are hinged, and the welding lever releasing insulation lever 13 of the welding rod pliers 14 and the forceps coupling portion Between the insulating cover 11 seated on one side of the upper surface of the coil (3) is provided a coil spring (17) provided with a spring cover 16, the insulating handle fixing bolt to the outside of the cable connection portion 4 of the body (1) An insulating handle 18 fixed by (8) is inserted.

Conventional welding rod holder 20 is constructed as described above is made of a brass material having a high electrical conductivity, heat resistance and wear resistance of the body (1) and the welding rod pliers (14). This is to ensure that the current transmitted through the welding cable is smoothly transferred to the electrode.

However, the welding rod holder 20 configured as in the prior art by inserting the cable into the cable connection portion 30 formed at one end of the body (1) and tighten the cable by tightening the tightening bolt (9) for the cable connection of the cable connection portion (4) Fix it. The cable is fixed by the physical pressure of the cable fastening bolt 9 for rotation by screwing. However, when excessive pressure is applied to the cable or when the cable is used for a long time, a phenomenon in which the stranded wire in the cable is cut occurs. The strand cutting in the cable weakens the connection state of the cable with the body of the electrode holder.

In addition, cutting the stranded wire in the cable according to the above-described reason may cause a short phenomenon due to the discharge between the shorted stranded wires, and the impact of the short may shorten the life of the welder or cause an unstable current supply by the disconnection itself. Defects may occur.

In addition, the cable that electrically connects the welder and the electrode holder can have a variety of lengths (usually several meters) depending on the working conditions, but long cables are generally used. Therefore, the cable can be twisted in the course of the work, for example, by changing the position of the welding machine or the electrode holder. A situation may occur in which the cable is moved or rotated to eliminate the twist of the cable. For this reason, the cable fastened between the cable and the electrode holder is easily released from the welding machine or the electrode holder due to the weakening of the clamping bolt of the cable connection. Phenomenon may occur.

In addition, the body of the electrode holder is provided with a plurality of insulating covers to prevent the electric shock of the operator in the body. These insulating covers are fixed by fastening bolts that penetrate through them and come into contact with the body. However, in the above-described fixing method, a conductive path may be formed as the tightening bolt is in contact with the body. Therefore, when working in a humid environment, there is a problem in that a discharge is generated in the conduction path and thus a risk of electric shock to an operator exists.

In order to solve the above problems, the present invention is provided with a pressing means for exerting a pressing force in the longitudinal direction of the cable in the cable connecting portion can be stabilized, the overall problem that can occur due to the unstable connection of the cable It provides a electrode holder that can eliminate the problem and improve the product competitiveness.

In addition, the present invention provides a welding rod holder that can be maximized by preventing the safety accident that may be caused by the discharge by being fastened in a structure that prevents the cable connection portion and the pressing means is formed discharge path.

The electrode holder of the present invention for achieving the above object is formed with a cable connecting portion to the end of the clamp so that the welding rod is bite and the other end of the cable is coupled to the other end of the cable connection is formed with a female thread hole in the direction of the cable A receiving space having a depth is formed, and a branching protrusion is formed to be bent and distributed on the bottom surface of the receiving space as the lines of the cable are branched to protrude to a predetermined height with distances separated from both sides from the bottom surface of the receiving space. Pressing means is provided to press the cable is inserted into the cable connecting portion of the electrode holder, the pressing means is a male thread formed on the outer periphery once the fastening means is fastened to the female threaded hole of the cable connection is formed in the center is inserted into the insertion hole is inserted into the cable is pressed At the distal end in the direction in which the means enters the electrode holder It characterized in that it comprises a grip portion for the other end the top face is pressed portion and the pressing portion is formed so that the pressure on the cable distribution lines to be bent of the dakmyeon user for easier gripping.

In the present invention, it is preferable that the pressing means further comprises a pressing portion and a gripping portion.

In the present invention, any one of the bottom surface of the cable connection portion and the front end surface of the pressing portion is formed with a pressing projection protruding to a certain height, the other further comprises a pressing groove of a shape corresponding to the pressing projection, the line of the pressing portion Between the end face and the insertion hole, it is preferable to further include a branch hole having a shape corresponding to the branch projection of the cable connection to provide a wide contact area to the lines of the cable when the pressing means is fastened to the welding rod holder to amplify the fixing force.

In the present invention, the outer periphery of the cable connection portion preferably further includes a cover for preventing an electric shock accident.

In the present invention, the cover and the gripping portion of the pressing means of the connecting portion of the cable contact portion further includes a first and second serration to prevent the mutual loosening by any shock or vibration of a predetermined force or less, the first And one side or both sides of the cable connection portion and the pressing means provided with a second serration further includes an elastic groove having a predetermined depth so that the first and second serrations are elastically supported to maximize the close contact when tightening each other. It is preferable to.

In the present invention, it is preferable to further include an elastic washer between the cable connecting portion and the pressing means to prevent loosening by any shock or vibration after being tightened with each other.

According to the present invention, a state in which the cable is stably fastened to the cable connection portion by the pressing means can be ensured, thereby preventing a phenomenon in which a short circuit occurs between the cable connection portion and the cable or the current supplied through the cable becomes unstable. In addition, the workability of the welding can be improved, and the effect of strengthening the product competitiveness can be expected.

In addition, according to the present invention, since the discharge path from the cable connection to the outside can be prevented from being formed, there is an effect that a safety accident such as an electric shock due to the operator can be prevented.

In addition, the present invention has the effect of ensuring the convenience of the operation of connecting the cable by having a cable fastening structure by the pressing means instead of the fastening method using a bolt.

1 is a cross-sectional view of a conventional electrode holder.

2 is a cross-sectional view of the electrode holder according to a first embodiment of the present invention.

Figure 3 is an exploded perspective view of the cable connecting portion and the pressing means of the electrode holder according to the first embodiment of the present invention.

Figure 4 is a cross-sectional view before coupling of the cable connecting portion and the pressing means of the welding rod holder according to the first embodiment of the present invention.

5 is a cross-sectional view after the combination of FIG.

Figure 6 is an enlarged cross-sectional view of the cable connection of the welding rod holder according to the second embodiment of the present invention.

7 is a cross-sectional view of the pressing means according to the third embodiment of the present invention.

Figure 8 is a cross-sectional view of the coupling of the cable connection portion and the pressing means according to the fourth embodiment of the present invention.

9 is a cross-sectional view of the welding rod holder according to the fifth embodiment of the present invention.

30: cable connection 32: receiving space

33: internal thread 34: bottom

35: wire 36: branching protrusion

37: crimping projection 38: cover

39:

first serration

40, 40a: pressurizing means

410: pressurizing portion 411: male thread

412: insertion hole 413: end surface

414: crimp groove 416: branch hole

420 and 420a: gripper 422: second serration

424: elastic groove 50: elastic washer

Hereinafter, the present invention will be described with reference to the accompanying drawings.

First Embodiment

2 is a cross-sectional view of a welding rod holder according to a first embodiment of the present invention, Figure 3 is an exploded perspective view of the cable connecting portion and the pressing means of the welding rod holder according to the first embodiment of the present invention, Figure 4 is a first embodiment of the present invention Figure 1 is a cross-sectional view before coupling of the cable connecting portion and the pressing means of the electrode holder according to an embodiment, Figure 5 is a cross-sectional view after coupling of Figure 4, using the same reference numerals for the same configuration as in the prior art and a detailed description thereof Omit.

At one end of the electrode holder 20, a clamping pin 14 is formed to bite the electrode, and the other end of the electrode holder 20 is formed with a cable connection portion 30 to which the cable is coupled. The pressing means 40 is inserted into the cable connection portion 30, the pressing means 40 has a structure for preventing the cable is stably fixed and detached from the welding rod holder 20, the detailed description thereof It will be described later.

The cable connection part 30 has a space formed in the direction of entry of the cable, and has a receiving space 32 having a female screw 33 formed at a predetermined length from the entrance of the space. The bottom surface 34 of the accommodation space 32 may be formed with a branch protrusion 36 projecting a predetermined height while being spaced apart from the inner wall by a predetermined distance. The branch protrusion 36 may have a horn shape having its side wall having an inclination angle toward the protruding end point, and the stranded protrusion 36 may expose a twisted pair of wires exposed at the end of the cable entering the side wall and the bottom surface 34 of the accommodation space 32. To guide distribution along the way. Here, the branch protrusion 36 is preferably formed in a conical shape so that the stranded wire included in the cable can be uniformly distributed on the bottom surface 34 of the accommodation space 32.

In addition, a compression protrusion 37 having a predetermined height may be further formed between the bottom surface 34 and the branch protrusion 36 of the accommodation space 32 of the cable connection part 30. The outer periphery of the cable connection part 30 may further include a cover 38 for preventing an electric shock accident.

The cover 38 may be fixed to the cable connection part 30 by various methods such as fixing by fastening by insert injection molding or fastening means such as a stop screw.

In addition, a first serration 39 may be further formed on one surface of the cover 38, and the cover 38 may be arbitrarily engaged with the pressing means 40 described later by the first serration 39. Loosening can be prevented.

The pressing means 40 has an insertion hole 412 which is a through hole through which the cable is inserted in the longitudinal direction, and a male screw 411 that can be fastened to the female screw 33 of the cable connection part 30 at one end of the outer periphery is formed in a predetermined length. do. And, the pressing means 40 is a pressing portion formed with a front end surface 413 for pressing the strands of the cable dispersed in the bottom surface 34 of the receiving space 32 in the front end in the direction entering the welding rod holder 20 ( 410 is formed. Then, the other end of the pressing unit 410 is configured to hold the grip portion 420 to facilitate the user's grip.

In addition, it is preferable to further form a pressing groove 414 formed in a shape corresponding to the pressing projection 37 of the cable connecting portion 30 on the front end surface 413 of the pressing portion 410, which is the cable connecting portion 30 Maximizing the clamping force of the cable by widening the pressing area of the cable wires distributed on the bottom surface 34 of the).

In this case, the shape of the pressing projection 37 or the pressing groove 414 is preferably made of a semi-circle to circular arc shape, but is not limited to this, any cable can be used if the shape is easy to crimp, , The cable connecting portion 30 and the pressing means 40 can be used interchangeably.

In addition, it is preferable to further form a branching hole 416 having a shape corresponding to the branching projection 36 of the cable connection part 30 between the insertion hole 412 in the front end surface 413 of the pressing portion 410. This is a means for maximizing the contact area of the wires of the cable to amplify the fixing force, which may be omitted in some cases.

In addition, one side or one or more insert protrusions 418 are further formed on one side of the rear end outer circumference of the pressing part 410, which is formed by insert injection molding the grip part 420 on the pressing part 410. After the pressing portion 410, the holding portion 420 is a means for preventing sliding in the axial direction or rotation.

In addition, the rear end of the pressing unit 410 is preferably formed to further expand the expansion hole (419) is extended to the rear end from the insertion hole 412 to guide the cable to the insertion hole 412 to be stably inserted. Do.

The gripping portion 420 may be configured to be fixed to the pressing portion 410 by insert injection molding or by a separate fastening means such as a stop screw.

It is preferable that a second serration 422 is formed on one surface of the gripping portion 420, that is, a front end surface entering the cable connection portion 30 to be engaged with the first serration 39 described above.

Here, the first and

second serrations

39 and 422 rotate smoothly in either direction, that is, in the tightening direction, but are deep enough to have a resistance force greater than an arbitrary force in the reverse direction in the release direction. It is preferable to be formed in a ratchet shape having a, which is to prevent the risk of safety accident by preventing the pressure means 40 pressurized by the welding rod holder 20 to be arbitrarily released by shock or vibration that may occur during operation. .

On the other hand, the gripping portion 420 may be further formed with an elastic groove 424 having a predetermined depth so that elasticity acts on the second serration 422.

When the elastic groove 424 tries to release a predetermined force when the first and

second serrations

39 and 422 are engaged with each other, the second serration 422 becomes the elastic groove 424. It is pushed by the elastic force provided by the means, so that the engagement state of the second serration 422 and the first serration 39 can be relaxed.

Looking at the fastening state of the electrode holder and the pressing means configured as described above are as follows.

Referring to FIG. 4, one end of the cable is inserted into the accommodation space 32 of the cable connection part 30 of the welding rod holder 20.

At this time, the bare wires of the cable ends exposed by the peeling of the coating are distributed through the branching projections 36 of the accommodation space 32 and distributed on the bottom surface 34, and the branching projections 36 and the bottom surface 34 are bent. The strands are also bent by the site.

Of course, the pressing means 40 is already inserted into the cable.

Then, by pressing and fixing the pressing means 40 to the cable connecting portion 30, when the female screw 33 of the cable connecting portion 30 and the male screw 411 of the pressing portion 410 are mutually fastened, the pressing means 40 Is in close contact with the cable connection (30).

At this time, the front end surface 413 of the pressing portion 410 of the pressing means 40 is in close contact with the bottom surface 34 of the cable connection portion 30, and thus between the bottom surface 34 and the front end surface 413 The cable holding force can be maximized as the cable wires located in the terminal are crimped.

In addition, each of the bottom surface 34 and the front end surface 413 is further formed with a crimping projection 37 and a crimping groove 414, thereby further amplifying the fixing force of the cable lines.

As such, when the close contact between the cable connection part 30 and the pressing means 40 is completed, the first and

second serrations

39 and 422 are maintained in engagement with each other, so that a predetermined force or more acts as described above. If not, since the shock or vibration is not arbitrarily released, it is possible to maintain stable work.

Of course, if you want to remove or replace the cable in the electrode holder 20, in the reverse order as described above, if the pressing means 40 in the release direction in a reverse direction by a predetermined force or more, the first and second serrations 39 ), The engagement state of the 422 is released, and then sequentially released, it is easy to connect or replace the cable in the electrode holder 20.

Second Embodiment

FIG. 6 is an enlarged cross-sectional view of a cable connection part of a welding rod holder according to a second embodiment of the present invention, which will be described below. For the same configuration as that of the first embodiment, the same reference numerals will be omitted. .

Branching projection (36a) of the cable connection portion 30 is preferably formed of a smooth streamline streamline 35 while spreading widely from the protruding end point to the bottom surface (34).

This induces the cable wires to spread smoothly when the cable wires are spread to the bottom surface 34 through the branching projection 36a so that the pressing force smoothly acts on the front end surface 413 of the pressing means 40. To do this.

In addition, although not shown, the pressing protrusion 37 or the pressing groove may be further formed between the bottom surface 34 and the branching protrusion 36a of the accommodation space 32.

Third Embodiment

7 is a cross-sectional view of the pressurizing means according to the third embodiment of the present invention. Referring to this, the same reference numerals are used for the same components as those of the first embodiment, and a detailed description thereof will be omitted.

Pressing means (40a) is formed integrally with the pressing portion 410 and the gripping portion 420.

That is, the pressing means 40a is a means for stably connecting the cable to the cable connecting portion 30 of the welding rod holder 20 and preventing the cable from being easily pulled out. It is preferable that the material cost is made of a synthetic resin having excellent strength and low strength.

Fourth Embodiment

8 is a cross-sectional view of the coupling between the cable connection portion and the pressing means according to the fourth embodiment of the present invention, the same reference numerals are used for the same configuration as the first embodiment and a detailed description thereof will be omitted.

It is preferable to further configure an elastic washer 50 that provides an elastic force between the cable connecting portion 30 of the welding rod holder 20 and the gripping portion 420 of the pressing means 40. It is used as a means to replace the two

serrations

39 and 422, but in some cases it can coexist and be used.

The elastic washer 50 is provided between two base materials such as 'spring washers' or 'wave washers' so that when the base materials are in close contact with each other, elasticity acts between the base materials so that the base materials are easily released from any shock or vibration. It is a means to prevent it.

Therefore, the elastic washer 50 is used as a means for suppressing mutual loosening of the cable connecting portion 30 and the pressing means 40, without being limited thereto, any loosening between the cable connecting portion 30 and the pressing means 40. Any means that can prevent the use can be used.

The elastic washer 50 shown here is a 'wave washer'.

Fifth Embodiment

9 is a cross-sectional view of a welding rod holder according to a fifth embodiment of the present invention. The same reference numerals will be used for the same components as those of the first embodiment, and detailed descriptions thereof will be omitted.

One end of the gripping portion 420a of the pressing means 40 extends to cover the outer circumferential surface of the cable connecting portion 30.

In this case, it is preferable to omit the cover 38 provided in the cable connecting portion 30.

Therefore, the gripping portion 420a of the pressing means 40 which is pressurized and fixed to the cable connecting portion 30 is to cover the outer periphery of the cable connecting portion 30.

What has been described above is an embodiment for implementing the structure of the electrode holder according to the present invention, the present invention is not limited to the above-described embodiment, various modifications of the scope of the invention without departing from the scope of the claims are also technical It will be included in the thought.

Claims

A cable connection part to which a clamp is clamped at one end and a cable is coupled to the other end; And

It includes a pressing means for pressing the cable is inserted into the cable connection in the inserted state,

The cable connection part has a female threaded hole formed in the direction of entry of the cable and a receiving space having a predetermined depth is formed. Branch protrusions are formed to be bent and distributed on the bottom surface,

The pressing means is formed in the outer periphery once the outer thread is formed to be fastened to the female threaded hole of the cable connection portion is formed in the insertion hole is inserted into the center and the pressing means is distributed in a bent on the bottom surface in the direction of entering the welding rod holder Electrode holder comprising a pressing portion having a front end surface for pressing the cable wires and a gripping portion to facilitate the user grip to the other end of the pressing portion.
The method according to claim 1,

The pressing means is a welding rod holder formed integrally with the pressing portion and the gripping portion.
The method according to claim 1,

Any one of the bottom surface of the cable connection portion and the front end surface of the pressing portion is further formed with a pressing projection protruding to a certain height, the other electrode holder is further formed with a pressing groove corresponding to the pressing projection.
The method according to claim 1,

A welding rod further comprising a branching hole having a shape corresponding to the branching projection of the cable connection portion between the tip end surface and the insertion hole of the pressing means to provide a wide contact area to the wires of the cable when the pressing means is fastened by the welding rod holder to amplify the fixing force. holder.
The method according to any one of claims 1 to 4,

Welding electrode holder further comprises a cover for preventing an electric shock on the outer periphery of the cable connection.
The method according to claim 5,

The welding rod holder further comprises a first serration and a second serration on one surface where the cover of the cable connection portion and the gripping portion of the pressing unit are in contact with each other to prevent the mutual loosening due to any shock or vibration under a predetermined force.
The method according to claim 6,

One or both sides of the cable connection portion and the pressing means provided with the first and second serrations are elastic grooves having a predetermined depth so that the first and second serrations are elastically supported so as to maximize the close contact force when tightening each other. Electrode holder including more.
The method according to claim 5,

Electrode washer holder further comprising an elastic washer between the cable connecting portion and the pressing means for preventing the loosening by any impact or vibration after being tightened.