JPH0338944Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a composite welding cable relay fitting for connecting a composite welding cable of a welding device.

(Prior Art) In a conventional welding device, as shown in FIG. 6, a power cable 2, a control cable 3, a base material side cable 4, and a control cable 5 are led out from a welding power source 1, and the power cable 2 and the control cable 3 are connected to each other. is connected to a composite welding cable 7 via a wire feeder 6, a welding torch 8 is connected to the tip of this composite welding cable 7, the base metal side cable 4 is connected to the base metal 9, and the control cable 5 A remote box 10 is connected to the tip, shielding gas is supplied to the gas passage in the composite welding cable 7 from a gas supply source G such as a cylinder, and the shielding gas is ejected from the welding torch 8 during welding. I was getting used to it.

Such conventional welding equipment has a problem in that the number of cables 2, 3, 4, and 5 led out from the welding power source 1 is large, resulting in poor workability.

In order to improve this, a composite welding cable 11 which integrates a power cable 2, a control cable 3, and a control cable 5 in order to reduce the number of cables led out from the welding power source 1 as shown in FIG.
It is being considered that In this case, the gas supply source G will be connected to the welding power source 1 side to facilitate gas handling.

(Problem to be solved by the invention) However, such a composite welding cable 1
1 is long, ranging from 20 to 50 meters, so accidents are expected in which parts of it will be cut off due to falling pieces of iron, being trampled by heavy objects, or being cut by melting on hot iron plates.
Since the composite welding cable 11 is more expensive than various conventional cables, it is desirable to reconnect the cut portion and reuse it.

An object of the present invention is to provide a composite welding cable relay fitting that allows the composite welding cable to be easily connected.

(Means for Solving the Problems) In order to achieve the above object, the configuration of the present invention will be explained with reference to FIGS. 1 and 2, which correspond to embodiments. Passage hole 1
4 and a conductor insertion hole 15 are arranged parallel to each other in parallel directions, and connection nozzles 16 are provided at both ends of the gas passage hole 14 in the relay fitting main body 13 to connect the gas passage hole 14 to the relay fitting main body 13. A power conductor compression portion is provided in a protruding manner in communication with the gas passage hole 14, and is provided on the relay fitting main body 13 in a portion along the conductor insertion hole 15 for compressing the power conductor 25 inserted into the conductor insertion hole 15. 22 is provided.

(Function) Such a relay fitting 12 is connected to each connection nozzle 16.
are inserted into the respective gas conduits 24 of the mutual composite welding cables 11 to be connected for compression connection, and the power conductors 25 of the mutual composite welding cables 11 are respectively inserted into the conductor insertion holes 15 from both sides for compression connection.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIGS. 1 and 2 show an embodiment of a relay fitting 12 for a composite welding cable according to the present invention. This relay fitting 12 has a rectangular parallelepiped-shaped relay fitting main body 13 made of copper.
There is a gas passage hole 14 inside along the longitudinal direction,
The conductor insertion holes 15 are arranged parallel to each other in parallel directions. Gas passage holes 14 are provided in the relay fitting body 13.
One end of each metal connection nozzle 16 is attached to each end of the metal connection nozzle 16 in a protruding manner by welding or the like in an airtight manner. An uneven surface 16A is periodically formed on the outer periphery of each connection nozzle 16. The gas passage hole 17 of each connection nozzle 16 is the gas passage hole 1 of the relay fitting main body 16.
It is formed in communication with 4. Relay fitting body 13
A viewing slit 18 is formed across the middle portion of the conductor insertion hole 15 in the longitudinal direction. Conductor sleeves 19 made of a thin copper sleeve or the like are removably inserted into the conductor insertion holes 15 on both sides of the viewing slit 18. A plurality of screw holes 20 are provided in the relay fitting body 13 on both sides of the viewing slit 18 in a direction perpendicular to each conductor insertion hole 15, and a clamp screw 21 is screwed into each screw hole 20, respectively. These screw holes 20 and the clamp screws 21 screwed into them constitute a power conductor compression section 22.

Next, an example of a connection structure of the composite welding cable 11 using such a relay fitting 12 will be explained with reference to FIGS. 3 to 5. That is, in the composite welding cable 11 to be connected, a power conductor 25 made of twisted wires is coated coaxially around the outer periphery of a metal gas conduit 24 having a gas passage 23 through which shielding gas passes, and a control wire is provided inside the power conductor 25. The wires 26 are twisted. Each control line 26 has a structure in which an insulation coating 26B is applied to the outer periphery of a core wire 26A. A cable sheath 27 made of an insulating material is provided around the outer periphery of the power conductor 25. Both ends of the composite welding cable 11 to be connected are faced to each other, and a gas conduit 24 and a power conductor 25 are connected from each end.
and a control line 26 are led out, and the gas conduit 24 is cut so that its exposed length is shorter than that of the power conductor 25. On the other hand, each exposed power conductor 25 is separated from the outer periphery of each gas conduit 24 and gathered on one side. Each connection nozzle 16 of the relay fitting 12 is connected from the tip of each exposed gas conduit 24 to its inside.
are press-fitted, each gas conduit 24 and each connection nozzle 16 are connected by compression, and the outer periphery of the compression connection portion is tied together at a plurality of locations with clamp bands 28, respectively. This allows the conduit connection 2
9 is constructed, and the gas passage 2 of the gas conduit 24 on both sides
3 are in communication with each other through the gas passage hole 17 of each connection nozzle 16 and the gas passage hole 14 of the relay fitting main body 13. A conductor sleeve 19 is fitted to the outer periphery of the exposed end of each of the power conductors 25, which are combined into one, so that the power conductors 25 made of stranded wires are bound together so that they do not fall apart. Each power conductor 25 is inserted into the conductor insertion hole 15 of the relay fitting main body 13 together with the conductor sleeve 19 on its outer periphery, and the insertion length is determined so that each tip can be seen through the viewing slit 18.
By using the viewing slit 18 in this way, each power conductor 25 can be inserted evenly into the conductor insertion hole 15, and the quality of the inserted state can be visually confirmed. Each power conductor 25 in the conductor insertion hole 15 is inserted into the conductor sleeve 1 by tightening each clamp screw 21.
9 is compressed and connected to the relay fitting main body 13. This forms a conductor connection portion 30 that interconnects the power conductors 25 on both sides. Also,
The control lines 26 on both sides are connected to each other at the outer part of the relay fitting 12 by insulated butt type connection terminals (NC terminals) or tab-on connectors (Faston terminals) to form control connection parts 31, respectively. .
In order to cover the conduit connection part 29, the conductor connection part 30, and the control line connection part 31, a pair of protective covers 32 of a predetermined length are fitted in advance to the outer periphery of the composite welding cable 11 on both sides. , shifted to a position in the longitudinal direction that does not interfere with connection work. These protective covers 32 are wear-resistant,
It is made of rubber, chloroprene, neoprene, etc. to have electrical insulation and flexibility. In addition, these protective covers 32
Each of the protective covers 32 has a large diameter at one end and becomes smaller toward the other end to fit the outer circumference of the cable sheath 27, and each of the protective covers 32 has a male joint at one end. A portion 33 and a female joint portion 34 are provided. Therefore, by shifting these protective covers 32 toward the connecting parts 29 to 31, these parts can be covered all at once, and mutual connections can be made by fitting the joint parts 33 and 34 together. can. When each of the connecting portions 29 to 31 is covered with the protective cover 32 in this manner, the central side of the protective cover 32 that covers each of the connecting portions 29 to 31 becomes larger in diameter to match the collective outer diameter of each of the connecting portions 29 to 31, Since both sides have a small diameter, it is prevented from shifting in the longitudinal direction. Both ends and the center of the protective cover 32 are sealed with taping to provide watertightness.
Therefore, by using the protective cover 32, the time-consuming taping work can be easily performed.

In the above embodiment, the power conductor compression part 25 is composed of a plurality of screw holes 20 provided in the relay fitting main body 13 and the clamp screws 21 screwed into these holes, but the It goes without saying that the power conductor compression section 13 may have a thin wall thickness that allows compression connection, and mechanically crush this portion to perform compression connection.

(Effects of the invention) As explained above, the composite welding cable relay fitting according to the present invention has a gas passage hole and a conductor insertion hole in the relay fitting body, so a gas conduit and a power conductor can be connected in one part. The number of parts can be reduced, and the connection can be made without increasing the size of the connection part. Further, since connecting nozzles are provided protruding from both ends of the gas passage hole of the relay fitting main body, connection to a gas conduit can be easily performed.
Further, since the power conductor compression portion is provided in the portion of the relay fitting main body along the conductor insertion hole, the power conductor can be connected easily and with a sufficient contact area by compression connection. Additionally, connecting the power conductor through the relay fitting body provides a larger heat dissipation area than connecting using a simple compression sleeve or terminal, which has the advantage of suppressing heat generation at the connection part. .

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the relay fitting according to the present invention, FIG. 2 is a sectional view taken along the line X-X in FIG. 1,
Fig. 3 is a longitudinal cross-sectional view showing an example of a composite welding cable using the relay fitting shown in Fig. 1, Fig. 4 is a cross-sectional view taken along line A-A in Fig. 3, and Fig. 5 is a schematic diagram of the control line connection section. FIG. 6 is a side view showing the configuration, FIG. 6 is a perspective view of a conventional welding device, and FIG. 7 is a perspective view of a welding device being considered by the applicant. 11... Composite welding cable, 12... Relay fitting, 13... Relay fitting main body, 14... Gas passage hole, 15... Conductor insertion hole, 16... Connection nozzle,
17...Gas passage opening, 18...Peeping slit, 1
9... Conductor sleeve, 20... Screw hole, 21...
Clamp screw, 23...Gas passage, 24...Gas conduit, 25...Power conductor, 26...Control line, 2
7...Cable sheath.

Claims (1)

[Claims for Utility Model Registration] (1) A gas passage hole and a conductor insertion hole are arranged parallel to each other in the relay fitting body, and connection nozzles are provided at both ends of the gas passage hole in the relay fitting body, respectively. is protrudingly provided so that its gas passage hole communicates with the gas passage hole of the relay fitting main body, and the power conductor inserted into the conductor insertion hole is compressed in a portion of the relay fitting main body along the conductor insertion hole. A relay fitting for a composite welding cable, characterized in that it is provided with a power conductor compression part for the purpose. (2) The relay for a composite welding cable according to claim 1, wherein the relay fitting main body has a viewing slit provided across a longitudinally intermediate portion of the conductor insertion hole. Metal fittings. (3) The relay fitting for a composite welding cable according to claim 1 or 2, wherein the conductor insertion hole is provided with a conductor sleeve therein. (4) The power conductor compression section includes a plurality of screw holes provided in the relay fitting body in a direction perpendicular to the conductor insertion hole, and clamp screws screwed into each of the screw holes, respectively. A relay fitting for a composite welding cable according to any one of claims 1 to 3, which has been registered as a utility model.