JP4900080B2 - Welding torch - Google Patents

Description

  The present invention mainly relates to a welding torch for holding by hand and performing welding.

As an example of this type of conventional welding torch 101, as shown in FIG. 6, a torch holder portion 102 that an operator can hold and hold with one hand, a torch main body 103 held by the torch holder portion 102, One having a torch cable 104 held by the torch holder portion 102 is known (see, for example, Patent Document 1). The torch holder portion 102 is divided into, for example, two parts, and a fastening member 105 for connecting the two divided torch holder portions 102 is passed through at least one of the two divided torch holder portions 102. A hole 106 is provided. Moreover, it is common that a hole 108 for passing a fastening member 107 for connecting the torch main body 103 and the torch holder portion 102 is provided.
Utility Model Registration No. 3034962

  In the welding torch, when the torch holder portion 102 divided into two by passing the fastening member 105 through the hole 106 is coupled, or when the torch main body 103 and the torch holder portion 102 are coupled by the fastening member 107, the fastening member is temporarily assumed. 105 and the fastening member 107 are conductive, and when the fastening member 105 and a part of the fastening member 107 are in contact with the charging part of the welding torch 101, the fastening member 105 and the fastening member 107 are also charged parts. The case where it becomes.

  In the present invention, after the divided torch holder part and the torch main body are connected by the fastening member, the insulating member is detachably attached to the hole for passing the tool for loosening or tightening the fastening member. It is an object of the present invention to provide a welding torch configured to be held by a torch holder portion in a disconnected state and a detached state.

In order to solve the above problems, a welding torch according to the present invention includes a torch holder portion that can be held and held by hand, a torch body coupled to the torch holder portion, and a torch cable coupled to the torch holder portion. a welding torch having a least one hole position and dimensions part of the fastening member for coupling said torch body and the torch holder portion is visible from the outside is provided on the torch holder portion, wherein An insulating member is detachably attached to at least one of the holes in a state where a tool for tightening or loosening the fastening member is not inserted into the hole, and one of the insulating members is attached to the torch holder portion. The other end is connected to the insulating member and is held by the torch holder by a connecting member.

  In addition to the above, the welding torch of the present invention is provided with a switch lever for operating a switch for starting welding on the lower end side of the torch holder portion, and connects the connecting member to the torch holder portion. The position to be made is the upper end side of the torch holder part with respect to the hole for attaching the insulating member, and the insulating member is removable in the upper end side direction of the torch holder part.

  In the welding torch according to the present invention, in addition to the above, the insulating member is an elastic body, and the insulating member has a shape in which a part of the hole to which the insulating member is attached is cut out. A space is provided between the insulating member and the inner surface of the hole when the member is attached to the hole.

  In addition to the above, the welding torch according to the present invention is formed by integrally forming the insulating member and the connecting member, and the insulating member and the connecting member are made of resin.

  Further, in the welding torch according to the present invention, in addition to the above, the fastening member for coupling the torch holder portion and the torch body is a bolt having a head portion and a screw portion, and the bolt is positioned inside the torch holder. The outer shape of the bolt head is larger than the inner diameter of the hole.

  As described above, according to the present invention, when each constituent member is coupled with a fastening member to constitute a welding torch, the fastening member has conductivity, and a part of the fastening member is included in the welding torch. If the charging member is in contact with the charging part, the fastening member may become a charging part, but it is possible to protect the charging part by providing an insulating member in a hole through which a tool for tightening or loosening the fastening member is passed. Become.

  In addition, it is necessary to remove or loosen the fastening member during maintenance of the welding torch. In this case, it is necessary to remove the insulating member, but the insulating member is connected to the torch holder portion by the connecting member and held. Therefore, it is possible to prevent the insulating member from being lost when the insulating member is removed.

  In addition, when removing the insulating member, the shape of the insulating member is cut out from the shape of the hole for attaching the insulating member, so a thin rod-like object is inserted into the gap between the insulating member and the hole. For example, the insulating member can be removed from the hole, and the insulating member can be easily removed.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS.

(Embodiment 1)
FIG. 1 is a diagram showing a schematic configuration of a welding torch in the present embodiment, and shows an example in which an insulating member 10 and a connecting member 11 described later are removed. The welding torch 1 of FIG. 1 includes a torch holder portion 2 that can be held and held by an operator, a torch body 3 attached to the torch holder portion 2, and a torch cable 4 attached to the torch holder portion 2. ing.

  A switch lever 5 for operating a switch for starting welding is provided on the lower end side of the torch holder portion 2. Further, the torch holder part 2 is configured by joining two members divided in the longitudinal direction, and the one part of the torch holder part 2 divided into two parts is divided into two parts. A tool for loosening or tightening a bolt 7 as a fastening member for joining the hole 7 as a fastening member for joining the screw 6 as a fastening member and the torch body 3 and the torch holder part 2 A hole 9 is provided for passage. Here, as an example of connecting the torch holder part 2 divided into two by the screw 6 into one, a method using a nut (not shown) screwed with the screw 6 or a division of the torch holder part 2 For example, there is a method in which a screw hole (not shown) in which the screw 6 is screwed is provided in the member in which the hole 7 is not provided among the one member thus formed and screwed.

  Further, inside the torch holder portion 2, one end side is connected to the torch kebble 4, and the other end side is provided with a metal hollow cylindrical connector (not shown) that can include a part of the torch main body 3. It has a structure. The connector is provided with two screw holes (not shown). When the bolt 8 is fastened to both of the two screw holes and the bolt 8 is tightened, the outer shape of the connector is reduced. Power works. Therefore, when a part of the torch body 3 is inserted into the connector from the other end side of the connector and the bolt 8 is fastened in this state, the connector and the torch body 3 are connected. In addition, this connector is hold | maintained in the torch holder part 2 by couple | bonding two members of the torch holder part 2 divided into 2 in the longitudinal direction. Further, the bolt 8 is previously fastened to at least one of the screw holes of the connector, and in this state, the two members of the torch holder portion 2 divided into two are coupled. As a result, the bolt 8 is arranged inside the torch holder part 2 with respect to the hole 9. The outer shape of the head of the bolt 9 is larger than the inner diameter of the hole 9, and the head of the bolt 8 can be seen from the outside through the hole 9.

  The bolt 8 includes a head portion and a screw portion, and the hole 9 has a concave space formed by the inner surface of the hole 9 and the end surface of the head portion of the bolt 8 when the bolt 8 is tightened. Then, the insulating member 10 is detachably attached to the concave space of the hole 9 as shown in FIGS. FIG. 2 shows a state where the insulating member 10 is attached to the hole 9, and FIG. 3 shows a state where the insulating member 10 is removed from the hole 9.

  As shown in FIGS. 2 and 3, the insulating member 10 is configured to be held by the torch holder portion 2 by the connecting member 11. That is, one of the connecting members 11 is connected to the insulating member 10, and the other has a flange-structured protrusion 12, and this protrusion 12 is for fixing the connecting member provided on the torch holder portion 2 shown in FIG. 1. The torch holder 2 is connected by being inserted into the hole 13. An example of the insulating member 10, the connecting member 11, and the protrusion 12 is shown in FIG. In addition, by providing the flange member 12 with a flange-structure-like projection 12 on one side of the connecting member 11 in this way, the connecting member fixing hole 13 provided in the torch holder portion 2 can be easily removed. .

  Further, the torch holder portion 2 is provided with a counterbore 15 in accordance with the outer shape of the connecting member 11 as shown in FIG. 1, and when the connecting member 11 is attached to the torch holder portion 2, as shown in FIG. The connecting member 11 is structured to sink into the surface of the torch holder part 2. With such a sinking structure, when the insulating member 10 is removed from the hole 9 of the torch holder part 2, the connecting member 11 rotates around the connecting member fixing hole 13 of the torch holder part 2. When the insulating member 10 is attached to the hole 9 of the torch holder part 2 again, the insulating member 10 can be easily inserted into the hole 9 provided in the torch holder part 2.

  With the above configuration, when the torch holder 2 and the torch main body 3 are coupled by tightening the bolt 8, the bolt 8 has conductivity, and a part of the bolt 8 is a torch. When the main body 3 is in contact with the charging unit, the bolt 8 may also be a charging unit, but the insulating member 10 can protect it.

  Further, as described above, the bolt 8 is arranged inside the torch holder portion 2 with respect to the hole 9, and the inner diameter of the hole 9 is made smaller than the outer shape of the head of the bolt 8. Therefore, this also makes it difficult to touch the bolt 8 when it becomes a charged part to improve safety, and the safety can be further improved by attaching the insulating member 10 to the hole 9. FIG. 5 is a cross-sectional view of the main part showing an outline of the positional relationship between the torch holder part 2, the hole 9, the bolt 8, and the insulating member 10.

  Further, it is necessary to loosen the bolt 8 during maintenance or the like of the welding torch 1. In this case, the insulating member 10 needs to be removed from the hole 9, but the insulating member 10 is connected to the torch holder portion 2 by the connecting member 11. More specifically, since it is connected to and held by one of the two divided members of the torch holder portion 2, it is possible to prevent the insulating member 10 from being lost when the insulating member 10 is removed from the hole 9. Can do.

  Further, according to the welding torch of the present embodiment, as shown in FIG. 2 and FIG. 3, the position where the connecting member 11 is connected to the torch holder portion 2 is positioned more than the hole 9 where the insulating member 10 is attached. 2, the insulating member 10 is removable toward the upper end side of the torch holder portion 2.

  With such a configuration, when the insulating member 10 is removed from the hole 9 of the torch holder portion 2, a thin rod-like object is inserted into the gap between the insulating member 10 and the hole 9, and the insulating member 10 is removed by prying. Without holding the holder portion 2 upside down, it becomes possible to ergonomically twist the wrist with the other hand while keeping the hand in the normal gripping position where welding is performed.

  Further, even after the insulating member 10 is removed from the hole 9 of the torch holder portion 2, the insulating member 10 can be pressed and held against the torch holder 2 with the thumb of the hand attached to the torch holder portion 2, and the torch body 3. A tightening and loosening tool (not shown) can be used through the hole 9 without causing the insulating member 10 to interfere with the fastening member 8 for coupling the torch holder portion 2 to each other.

  The insulating member 10 is an elastic body, and the insulating member 10 is preferably provided with a shape in which a part of the shape of the hole 9 is notched when the insulating member 10 is attached to the hole 9, that is, a notch portion 14. By doing in this way, when the insulating member 10 is attached to the hole 9, there is a space between the insulating member 10 and the inner surface of the hole 9, and it becomes possible to insert and bar the rod-shaped body in this space, When the insulating member 10 is removed from the hole 9, it can be easily removed.

  Alternatively, the insulating member 10, the connecting member 11, and the protrusion 12 may be made of a resin such as rubber or soft plastic, and the insulating member 10, the connecting member 11, and the protrusion 12 may be integrally molded. In this way, the number of parts can be reduced and the price can be reduced.

  In the present embodiment, the protection in the case where the bolt 8 becomes the charging part has been described. For example, when the screw 6 touches the charging part of the welding torch 1 and becomes the charging part, the case of the bolt 8 is used. Similarly, the insulating member 10 may be attached to the hole 7 through which the screw 6 is passed.

  Further, the insulating member 10 is not limited to being attached to one hole, and may be attached to a plurality of holes as necessary.

  In the welding torch according to the present invention, when the constituent members are combined to form the welding torch, the fastening member has conductivity, and a part of the fastening member is in contact with the charging part of the welding torch. In this state, the fastening member may also become a charged part, but it can be protected by the insulating member, and it is necessary to remove or loosen the fastening member during maintenance of the welding torch. It is necessary to remove the insulating member, but since the insulating member is connected to the torch holder portion by the connecting member and held, it can be prevented that the insulating member is lost when the insulating member is removed, In particular, it is industrially useful as a welding torch for holding by hand.

The figure which shows schematic structure of the state which removed the insulating member and the connection member in the welding torch in embodiment of this invention The figure which shows schematic structure of the welding torch in embodiment of this invention The figure which shows schematic structure of the state which removed the insulating member from the hole of the welding torch in embodiment of this invention The figure which shows an example of the insulating member in the embodiment of this invention, a connection member, and protrusion Sectional drawing of the principal part which shows the positional relationship of the torch holder part, insulation member, hole, and volt | bolt in embodiment of this invention The figure which shows schematic structure of the conventional welding torch

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Welding torch 2 Torch holder part 3 Torch main body 4 Torch cable 5 Switch lever 6 Fastening member 7 Hole 8 Fastening member 9 Hole 10 Insulating member 11 Connecting member 12 Protrusion 13 Connecting member fixing hole 14 Notch 15 Counterbore 101 Welding torch 102 Torch holder 103 Torch body 104 Torch cable 105 Fastening member 106 hole 107 Fastening member 108 hole

Claims (6)

A torch holder that can be held and held by hand,
A torch body coupled to the torch holder part;
A welding torch comprising a torch cable coupled to the torch holder part,
A portion of a fastening member that couples the torch holder part and the torch main body is provided in the torch holder part with at least one hole having a position and dimensions that are visible from the outside;
An insulating member that is detachably attached to at least one of the holes in a state in which a tool for tightening or loosening a fastening member in the hole is not inserted ;
One of the insulating members is a welding torch held on the torch holder part by a connecting member in which one is connected to the torch holder part and the other is connected to the insulating member. A switch lever for operating a switch for starting welding is provided on the lower end side of the torch holder part, and the position where the connecting member is connected to the torch holder part is positioned more than the hole for attaching the insulating member. The welding torch according to claim 1, wherein the insulating member is detachable in an upper end side direction of the torch holder portion. The insulating member is an elastic body, and the insulating member has a shape in which a part of the hole to which the insulating member is attached is cut out, and the insulating member and the hole when the insulating member is attached to the hole. The welding torch according to claim 1, wherein there is a space between the inner surface of the welding torch. The welding torch according to any one of claims 1 to 3, wherein the insulating member and the connecting member are made of resin, and the insulating member and the connecting member are integrally molded. The fastening member for connecting the torch holder part and the torch body is a bolt having a head part and a screw part, the bolt is located inside the torch holder, and the outer shape of the head part of the bolt is larger than the inner diameter of the hole. The welding torch according to any one of claims 1 to 4, wherein the welding torch is large. The torch holder part is provided with a counterbore according to the outer shape of the connecting member, and when the connecting member is attached to the torch holder, the connecting member sinks into the surface of the torch holder part. The welding torch according to any one of claims 1 to 5.

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