JPH0338947Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a connection structure for a composite welding cable.

(Prior Art) As shown in FIG. 7, a conventional welding device connects a welding power source 1 to a power cable 2, a control cable 3,
The base material side cable 4 and the control cable 5 are led out,
The power cable 2 and the control cable 3 are connected to a composite welding cable 7 via a wire feeding device 6,
A welding torch 8 is attached to the tip of this composite welding cable 7.
is connected, the base metal side cable 4 is connected to the base metal 9, the remote box 10 is connected to the tip of the control cable 5, and the gas passage in the composite welding cable 7 is shielded from a gas supply source G such as a cylinder. The structure is such that gas is supplied and the shielding gas is ejected from the welding torch 8 during welding.

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 the bridge may 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 connection structure that allows the composite welding cable to be easily connected.

(Means for Solving the Problems) The structure of the present invention for achieving the above object will be explained with reference to FIGS. 1 to 6 corresponding to the embodiments. The present invention has a gas conduit 24, power conductor 2
5 and a control line 26 housed in a cable sheath 27, the composite welding cables 11 face each other at their mutual ends to be connected, and the gas conduits 24 of the composite welding cables 11 on both sides are connected to each other through gas passages. 23 are connected to each other by a conduit connection part 29, the power conductors 25 are connected to each other by a conductor connection part 30, and the control lines 26 are connected to each other by a conductor connection part 30.
1, and each of these connecting portions 29 to 31
are collectively covered with protective covers 32 of a predetermined length made of a cylindrical insulating molded product fitted to the outer periphery of the composite welding cable 11 on both sides, and each of the protective covers 32 covers each of the connection parts 29 to 31. Each of the protective covers 3 has a large diameter at one end that collectively stores the cables, and becomes smaller in diameter toward the other end to fit the outer periphery of the cable sheath 27.
Reference numeral 2 denotes a male and female joint portion 3 provided on each one end side.
3 and 34 are interconnected and held.

(Function) In this way, when each of the connecting parts 29 to 31 is covered with the protective cover 32 and the protective covers 32 are connected to each other by the male and female joint parts 33 and 34, the troublesome work of wrapping insulating tape is avoided. This reduces the number of connections, allowing you to perform connection work more efficiently. In addition, each protective cover 32 has a large diameter at one end that collectively accommodates the connecting parts 29 to 31, and a small diameter at the other end, and is connected to each other at one end on the large diameter side, so that the longitudinal direction It shifts and stops moving.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

1 to 5 show a first embodiment of the present invention. In this embodiment, a relay fitting 12 as shown in FIGS. 4 and 5 is used to easily connect the composite welding cable 11. This relay fitting 12 is made of copper and has a rectangular parallelepiped shape.
3, and a gas passage hole 14 and a conductor insertion hole 15 are arranged in parallel along the longitudinal direction in the relay fitting main body 13. One end of a metal connection nozzle 16 is attached to each end of the gas passage hole 14 to the relay fitting main body 13 by welding or the like. An uneven surface 16A is periodically formed on the outer periphery of each connection nozzle 16. Gas passage hole 1 of each connection nozzle 16
7 is formed to communicate with the gas passage hole 14 of the relay fitting main body 16. A viewing slit 18 is formed in the relay fitting main body 13 so as to cross the longitudinally intermediate portion of the conductor insertion hole 15 . Peeking slit 18
Conductor sleeves 19 made of a thin copper sleeve or the like are removably inserted into the conductor insertion holes 15 on both sides. The relay fitting body 13 has a peep slit 1.
A plurality of screw holes 20 are provided on both sides of the conductor insertion hole 15 in a direction perpendicular to each conductor insertion hole 15, and a clamp screw 21 is screwed into each screw hole 20, respectively.

A connection structure 22 for a composite welding cable 11 using such a relay fitting 12 is constructed as shown in FIGS. 1 to 3. 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, a power conductor 25, and a control line 26 are led out from each end, and the gas conduit 24 is connected to the power conductor 2.
It is cut so that the exposed length is shorter than that of 5. 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 press-fitted into the inside of each exposed gas conduit 24 from its tip, and 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 breads 28, respectively. This constitutes a conduit connecting portion 29, in which the gas passages 23 of the gas conduits 24 on both sides are communicated with each other through the gas passage holes 17 of each connection nozzle 16 and the gas passage hole 14 of the relay fitting main body 13. A conductor sleeve 19 is attached to the outer periphery of the tip of each power conductor 25 that is exposed and combined into one.
are fitted into each other, and each power conductor 25 made of twisted wires is tied together so as not to come 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 compressively connected to the relay fitting body 13 together with the conductor sleeve 19 by tightening each clamp screw 21 . This forms a conductor connection portion 30 that interconnects the power conductors 25 on both sides. In addition, the control wires 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 line connection portions 31, respectively. has been done. 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 made of rubber, chloroprene, neoprene, or the like to have wear resistance, electrical insulation, and flexibility. The protective covers 32 are formed into a tapered cylindrical shape that has a large diameter at one end that collectively accommodates the connection parts 29 to 31 and becomes smaller in diameter toward the other end to fit the outer periphery of the cable sheath 27. , and a male joint part 33 and a female joint part 3 are provided at each end of these protective covers 32.
4 is 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 by taping.
It is becoming watertight. Therefore, by using the protective cover 32, the time-consuming taping work can be easily performed.

FIG. 6 shows a second embodiment of the composite welding cable connection structure according to the present invention. In this embodiment, the above-mentioned relay fitting 12 is not used;
This shows an example in which a gas conduit 24 and a power conductor 25 are connected. The rest of the structure is similar to that shown in FIG. 1 described above. That is, in this embodiment, a single connection nozzle 16 having uneven surfaces 16A at both ends is used, and each end of this connection nozzle 16 is press-fitted into the ends of the gas conduit 24 on both sides, thereby forming a compression connection as described above. is made, and its outer periphery is tightened with a clamp band 28 to form a conduit connection portion 29. On the other hand, crimp terminals 35 are crimp-connected to each end of each power conductor 25, and the crimp terminals 35 are connected with bolts 36 and nuts 37 to form a conductor connection portion 30. Although not shown, each control line connection section 31 is configured in the same manner as described above.

Even with such a structure, substantially the same effects as those of the first embodiment described above can be obtained.

(Effects of the invention) As explained above, in the connection structure of the composite welding cable according to the invention, the conduit connection part, the conductor connection part, and the control line connection part are made of a molded product and each has a predetermined length. Since the structure is covered with a protective cover, the troublesome work of wrapping insulating tape is reduced, and the connection part can be formed efficiently. In addition, each protective cover has a large diameter at one end that stores the connection parts all at once, and a small diameter at the other end, and is continuous with each other at one end on the large diameter side, so it has the advantage that it will not shift in the longitudinal direction. There is. Furthermore, since each end of each protective cover is connected by a male joint part and a female joint part, mutual connection can be easily performed with one touch.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a first embodiment of the connection structure according to the present invention, FIG. 2 is a cross-sectional view taken along the line X-X of FIG.
FIG. 3 is a plan view showing the schematic configuration of the control line connection part in this embodiment, FIG. 4 is a vertical cross-sectional view of the relay fitting used in the first embodiment, and FIG. A-
A-line sectional view, Figure 6. Second connection structure according to the present invention
FIG. 7 is a longitudinal sectional view of the embodiment, FIG. 7 is a perspective view of a conventional welding device, and FIG. 8 is a perspective view of a welding device being considered by the present applicant. 11...Composite welding cable, 22...Connection structure, 23...Gas passage, 24...Gas conduit, 25
... Power conductor, 26 ... Control line, 27 ... Cable sheath, 29 ... Conduit connection part, 30 ... Conductor connection part, 31 ... Control line connection part, 32 ... Protection cover, 33 ... Male joint Part, 34...Female joint part.

Claims (1)

[Scope of utility model registration request] Composite welding cables in which a gas conduit, a power conductor, and a control line are housed in a cable sheath face each other at their mutual ends to be connected, and the gas conduits of the composite welding cables on both sides are in mutual gas passages. are connected to each other by a conduit connection,
the power conductors are interconnected with conductor connections;
The control lines are connected to each other at control line connection parts, and each of these connection parts is covered with a protective cover of a predetermined length made of a cylindrical insulating molded product fitted to the outer periphery of the composite welding cable on both sides. Each of the protective covers has a large diameter at one end that collectively accommodates the respective connection parts, and has a diameter that becomes smaller toward the other end to fit the outer periphery of the cable sheath, and each of the protective covers has a shape that fits the outer circumference of the cable sheath. A connection structure for a composite welding cable, characterized in that the covers are mutually connected and held by male and female joints provided at each one end side.