JPH0231262Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is directed to reducing fumes and
This relates to a welding torch that has the function of sucking and exhausting CO ₂ gas, etc.

[Conventional technology]

Conventional welding torches of this type are
As shown in Publication No. 38852, the torch is equipped with a fume gas suction nozzle that surrounds the shield gas injection nozzle of the torch body.
The fume and CO ₂ gas collected by the gas suction nozzle were exhausted through a fume and gas duct pipe provided separately from the conduit cable connecting the torch body and the welding machine body.

[Problem that the invention attempts to solve]

However, in the above torch, the two pipes, the conduit cable and the fume gas duct pipe, are led out separately from the torch body, so
There was a problem with poor workability. In conventional torches of this type, the conduit cable and the fume gas duct pipe are bound together with tape, etc., but in this case, the bundled cables synergistically bind each other and become difficult to bend. However, there was a problem that the workability deteriorated. Furthermore, since two cables are attached to the torch body, there is a problem in that it is difficult to direct the welding wire to a desired position.

An object of the present invention is to provide a welding torch that solves the above problems.

[Means for solving problems]

The present invention will be explained with reference to FIGS. 1 to 3 showing an embodiment thereof. Reference numeral 1 denotes a connector connected to the welding machine main body, 6 a power supply chip 49 at the tip, and a shielding gas jet to cover the chip. In the torch body having a nozzle 47, the connector 1 and the torch body 6 are connected by a flexible conduit cable 2 containing a shielding gas passage, and a fume gas is connected concentrically around the outer periphery of the shielding gas injection nozzle 47. A suction nozzle 57 is provided.
In the present invention, a flexible fume gas duct pipe 24 is provided along the conduit cable 2 to cover the outer periphery of the conduit cable 2 with a gap therebetween. One end and the other end of this fume gas duct pipe 24 are connected to the torch body 6 and the connector 1, respectively. Inside the torch body 6 are a fume gas suction nozzle 57 and a fume gas suction nozzle 57.
A gas communication passage is formed to communicate with the space inside the gas duct pipe 24, and the connector 1
A hume gas outlet 12 is provided which communicates with the space inside the hume gas duct pipe 24. In the middle of the humu gas duct pipe 24 or between the torch body 6 and the hume gas duct pipe 2
4, and the portions on both sides of the rotatable joints 24 and 34 are relatively rotatably connected by the rotatable joints. [Function] The above-mentioned In this way, the outer circumference of the conduit cable is covered with a gap, and a fume/gas duct pipe is placed along the conduit cable so that the fume, CO ₂ gas, etc. collected by the fume/gas suction nozzle are transferred to the fume/gas duct. If the exhaust is passed through the pipe, there is no need to separate the fume gas duct pipe and the conduit cable during welding work. Further, since a gap is formed between the conduit cable and the fume gas duct pipe, the conduit cable and the fume gas duct pipe can be easily bent. Furthermore, as mentioned above, Huyum. In the middle of the gas duct pipe or between the torch body and
By disposing a rotatable joint between the gas duct pipe and the gas duct pipe, the welding wire can be easily directed to a desired position. Therefore, welding workability can be greatly improved compared to conventional torches.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 3 show an embodiment of the present invention. In the figures, 1 is a connector for connecting the welding torch of the present invention to a welding machine body (not shown), and this connector 1 has a conduit cable attached to it. One end of 2 is connected. The other end of the conduit cable 2 is introduced into a torch body 3, and a torch base 4 having a power supply conductor and a shielding gas passage, which will be described later, is disposed within the torch body 3. Conduit cable 2 introduced into torch body 3
The other end is connected to one end of the torch base 4, and a torch head 5 consisting of a power supply chip, a shield gas injection nozzle, etc. is attached to the other end of the torch base 4. These torch body 3 and torch base 4
and the torch head 5 constitute a torch body 6.

As shown in FIG. 2, the connector 1 is connected to a cap 7 as a power supply connector, a control cable 8 for controlling on/off of a switch to be described later, and a shield gas pipe 9. A connection plug 10 that is connected to a welding machine control terminal (not shown) is attached to the free end of the control cable 8, and a mounting bracket 11 that is connected to a shield gas supply source (not shown) is attached to the free end of the shield gas pipe 9. There is. The connector 1 is also integrally formed with a fume gas outlet 12 that opens in a direction perpendicular to its axis, and a suction device (not shown) is connected to this hume gas outlet 12. ing. A cylindrical hume gas duct pipe mounting base 13 is formed near the fume gas outlet 12 of the connector 1, and one end of the conduit cable 2 is disposed at the axial center of the space within this base 13. Conduit cable 2 as shown in Figure 3
has a sprink liner 14 at its axial center and a shield gas passage 15 outside the spring liner 14. Further, a power supply cable 16 is disposed outside the shield gas passage 15, and the power supply cable 16 is made of an annular base 17 forming the shield gas passage 15, with stranded wires 18 attached to the outer periphery thereof. The outer periphery of the stranded wire 18 is covered with the insulation coating 1
9 is coated, and the strands 1 of the power supply cable 16
Control cables 8, 8 are arranged between them. Shield gas passage 1 of conduit cable 2
5 is connected to the shield gas pipe 9 within the connector 1, and the power supply cable 17 is electrically connected to the base 7. Further, an end fitting 20 of the spring liner 14 is fixed to the axis of the cap 7, and the end fitting 20 prevents the spring liner from slipping out from the cap 7. Pipe fitting 2 is attached to the fume gas duct pipe mounting base 13 of connector 1.
A fume gas duct pipe 24 having a spiral protrusion 23 on the outer periphery is screwed into a spiral groove 22 formed on the inner surface of the other end of the pipe joint 21 .

As shown in FIG. 4, the fume gas duct pipe 24 is cut at its midpoint and divided into a torch body side duct pipe 24a and a connector side duct pipe 24b, and both pipes 24a and 24b are rotatable pipes. They are rotatably connected to each other via a joint 25. The rotatable pipe joint 25 is a joint member 28 consisting of a first part 26 fixed to the torch body side duct pipe 24a and a second part 27 having a smaller diameter than the first part and located on the connector side duct pipe 24b side. The second portion 27 of the joint member has a connector side duct pipe 24b.
It is slidably fitted on the inner periphery of a sliding member 29 that is fixed inside. An annular stopper 30 is fixed to the free end of the second portion 27, and the stopper 30 abuts against the end of the sliding member 29, causing the joint member to
8 is designed to prevent it from falling off. Therefore, the torch body side duct pipe 24a and the connector side duct pipe 24b are rotatably connected to each other by the joint 25.

The torch body 3 is formed into two halves made of insulating resin, and the two halves 3a and 3b are assembled by joining together with screws. The interior of the torch body 3 is divided by a wall 31 into a hume/gas communication space 32 and a switch storage chamber 33.

One end of the torch body 3 and the other end of the hume gas duct pipe 24 are connected by a rotatable joint 34. This rotatable pipe joint 34 consists of a first part 35 on the side of the torch body 3 and a second part 36 on the side of the hume gas duct pipe 24. A sliding member 3 is provided inside the first portion 35.
7 is fixedly installed, and the sliding member 37 is fitted onto the outer periphery of one end of the torch body 3 so as to be able to slide in the circumferential direction. An annular stopper 38 is fitted into a circumferential groove provided on the outer periphery of one end of the torch body 3, and the stopper abuts the end of the sliding member 37 to prevent the fume gas duct pipe 24 from separating from the torch body 3. has been done. A spiral groove 39 is provided on the inner circumferential surface of the second member 36, and the spiral convex portion 23 of the hum gas duct pipe 24 is screwed into this groove 39 to rotate with the hum gas pipe 24. A universal joint 34 is connected thereto.

A switch 40 connected to a control cable 8 is fixed in a switch storage chamber 33 in the torch body 3, and an operating lever 41 for operating the switch is arranged adjacent to the switch. The switch 40 is connected to a control cable, and by operating the switch 40 with an operating lever 41, on/off control of the welding current and on/off control of the shielding gas supply are performed. 4
2, 42, ... are mounting pins implanted in the power supply conductor 43 constituting the torch base 4, and these pins are inserted into pin holding recesses 44, 44, ... formed in the torch body 3 as shown in FIG. After being inserted, the power supply conductor 43 is positioned and fixed to the torch body 3. A bending member 45 bent in a substantially dogleg shape is connected to the other end of the power supply conductor 43, and an insulating cylinder 46 is screwed to the other end of the bending member. A shield gas injection nozzle 47 is screwed onto the insulating cylinder 46, and a bending member 4 is installed inside the insulating cylinder 46.
A power supply body 48 extending from 5 is disposed.
A chip body 50 having a power feeding chip 49 at its tip is screwed onto the power feeding body 48 . At the end of the torch body 3 on the side from which the bending member 45 protrudes, there is a mounting hole 51 for attaching a suction nozzle base, which will be described later.
is formed, and an annular groove 52 is formed near the inner end of the mounting hole 51. A suction nozzle base 53 is fitted into this mounting hole 51, and a flange 54 is attached to the base.
is formed, and the flange portion 54 is fitted into the annular groove 52 to prevent the suction nozzle base portion 53 from coming off from the torch body 3. The suction nozzle base 53 also has a flange portion 54 that partially contacts the torch body 3, and a suction nozzle attachment portion 56 is formed at the end of the suction nozzle base 53 on the opposite side from the torch body 3. A cylindrical fume/gas suction nozzle 57 is attached to the suction nozzle attachment portion 56, and a tapered portion 58 whose diameter gradually decreases toward the tip is formed near the tip of the fume/gas suction nozzle 57. A plurality of hume gas suction ports 59, 59, . . . are formed in the tapered portion. These fume gas suction ports 59,5
The fume gas sucked in from 9, ... passes between the hume gas suction nozzle 57 and the shield gas injection nozzle 47 and between the suction nozzle base 53 and the bending member 45 and reaches the fume gas in the torch body 3. The gas enters the gas communication space 32, further passes between the fume gas duct pipe 24 and the conduit cable 2, and is exhausted from the fume gas outlet 12 of the connector 1 through a suction device (not shown).

In the above embodiment, between the torch main body 6 and the fume gas duct pipe 24 and the fume gas duct pipe 24,
Although the rotatable joints 25 and 34 are disposed in the middle of the gas duct pipe 24, one of these rotatable joints may be omitted. When the rotatable pipe joint 34 is omitted, the hume gas duct pipe 24 and the torch body 6 are connected by a joint similar to the pipe joint 21 used to connect the hume gas duct pipe 24 and the connector 1 in the above embodiment. do it.

In order to improve the operability of the torch body 6, it is convenient to arrange the rotatable pipe joint as close to the torch body 6 as possible. Therefore, in the above embodiment, when the rotatable pipe joint 34 that connects the torch main body 6 and the hume gas duct pipe 24 is omitted, the rotatable pipe joint 25 provided in the middle of the hume gas duct pipe 24 is used as the torch. It is preferable to arrange it at a position close to the main body 6.

[Effect of idea]

As described above, according to the present invention, a fume gas duct pipe that covers the outer periphery of the conduit cable with a gap is provided along the conduit cable, and the fume and CO ₂ gas collected by the fume gas suction nozzle are removed. etc. are exhausted through the fume gas duct pipe, so there is no need to separate the fume gas duct pipe and the conduit cable during welding work, and there is no need to separate the fume gas duct pipe and the conduit cable between the conduit cable and the fume gas duct pipe. Since a gap is formed in the conduit cable and the fume gas duct pipe, the conduit cable and the fume gas duct pipe can be easily bent. In addition, in the middle of the humu gas duct pipe or between the torch body and the humu gas duct pipe,
Since a rotatable joint is disposed between the welding wire and the gas duct pipe, the welding wire can be easily directed to a desired position. Therefore, welding workability can be greatly improved compared to conventional torches.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view showing the torch body of an embodiment of the present invention, FIG. 2 is a partially sectional front view showing the vicinity of the connector of an embodiment of the present invention, and FIG.
Fig. 4 is a partially sectional front view showing the rotatable pipe joint in the middle of the fume gas duct pipe of the torch of the present invention, and Fig. 5 is a sectional view taken along the - line in Fig. 1. It is. 1... Connector, 2... Conduit cable,
6...Torch body, 12...Hyum gas outlet, 24...Hyum gas duct pipe, 2
5, 34... Rotatable pipe joint, 47... Shield gas injection nozzle, 49... Power supply chip, 57...
...Huyum gas suction nozzle.

Claims (1)

[Claim for Utility Model Registration] A connector connected to the welding machine body, a power supply chip, and a torch body having a shielding gas injection nozzle covering the chip are connected by a flexible conduit cable containing a shielding gas passage, In a welding torch in which a fume gas suction nozzle is disposed so as to concentrically surround the outer periphery of the shield gas injection nozzle, a flexible hume gas duct pipe that covers the outer periphery of the conduit cable with a gap therebetween is provided. A pipe is provided along the conduit cable, and one end and the other end of the fume gas duct pipe are connected to the torch body and the connector, respectively. A gas communication passage is formed to communicate with the space in the hume gas duct pipe, and the connector is provided with a hume gas outlet that communicates with the space in the hume gas duct pipe, and the connector is provided in the middle of the hume gas duct pipe or in the torch body. and a humu gas duct pipe, and a rotatable pipe joint is disposed between the pipe and the humid gas duct pipe, and portions on both sides of the rotatable pipe joint are relatively rotatably connected by the rotatable pipe joint. torch.