JP3893047B2 - Cable arrangement method for welding machine and cable receiving jig used therefor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cable arrangement method of a welder for supporting a cable of a welder used in a steel pipe when welding the steel pipe in the steel pipe, and a cable receiving jig used for the method.
[0002]
[Prior art]
When connecting a plurality of steel pipes of a predetermined length in the axial direction, a plurality of welding machines corresponding to the circumferential welds are introduced into the steel pipe, and these welding machines are arranged at predetermined positions in the axial direction of the steel pipe. Circumferential welding of steel pipes is performed. In this case, for the circumferential welding of steel pipes, an automatic welding machine that performs welding by automatically running these inner surfaces in the circumferential direction is mainly used. Various cables extend from the main body of the automatic welder, and in order to smoothly perform automatic welding, it is necessary to support the cable near the central portion in the diameter direction of the steel pipe and prevent the cables from being entangled with each other. .
[0003]
Conventionally, when supporting the cable of this welder, the operator must hold the cable by hand inside the steel pipe while the automatic welder runs on the inner peripheral surface of the steel pipe and performs automatic welding. It was broken. Moreover, as a case where it does not depend on a manpower, the cable was directly suspended in the air by suspending the cable at predetermined intervals in the longitudinal direction. In addition, a rope or a bar is simply provided so as to extend in the axial direction of the steel pipe in the vicinity of the central portion in the diameter direction of the steel pipe, and a cable is connected to the rope or the bar.
[0004]
[Problems to be solved by the invention]
However, supporting the cable manually is not preferable because it places a great burden on the operator. Also, the method of hanging the cable and floating it in the air has caused inconveniences such as the slack of the cable, or conversely, the cable is pulled by a strong force and disconnected. In addition, the cables are entangled, causing kinks and disconnections. On the other hand, with respect to a method in which ropes and rods are provided so as to extend in the axial direction of the steel pipe and the cables are tied to these, the work itself of tying the cables gives the operator trouble. In addition, when using a rope, it is necessary to increase the strength of the rope itself so that it can withstand the weight of the cable on which the rope is supported, and a large support means for supporting the rope is required. It was.
[0005]
SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and a cable arrangement method for a welding machine that can smoothly weld while preventing troubles such as cable entanglement, kinking, and disconnection, and a simple structure used for the method. Provide a cable receiving jig .
[0006]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a cable arrangement method for a welding machine that is performed when a steel pipe is welded from the inside thereof, and corresponds to a plurality of circumferential welding positions in the axial direction of the steel pipe. A plurality of welding machines are arranged in the steel pipe, a cable receiving jig for receiving the cable of the welding machine is arranged in the steel pipe, and the shaft of the steel pipe is fixed by the cable receiving jig without restraining the cables of the welding machine. The cable of the welding machine is sequentially extended from the cable receiving jig at a position corresponding to each welding machine.
[0007]
If welding is performed at a plurality of positions in the axial direction of the steel pipe using a plurality of welding machines at the same time, a large number of cables corresponding to the number of welding machines carried into the steel pipe exist in the steel pipe. According to the cable arrangement method according to the present invention, the cable receiving jig collectively stores the cables of these welding machines, so that the cables can be arranged and arranged. At this time, since the cable receiving jig receives the cables without restraining each other, an unreasonable force does not act on the cables, and kink and disconnection do not occur. Further, since the cables are sequentially extended from the cable receiving jig at positions corresponding to the respective welding machines, it is possible to effectively prevent the cables from being entangled with each other.
[0008]
In the cable arranging method of the welding machine, the height at which the cable of the welding machine is arranged is adjusted by the cable receiving jig , so that the welding height can be dealt with flexibly. For example, when the upper part of the steel pipe is welded, it is possible to cope with the situation by keeping the cable on the upper side of the steel pipe.
[0009]
In the present invention, in order to solve the above-mentioned problem, when welding a steel pipe from the inside of the steel pipe, a welding machine cable receiving jig for receiving a cable of a welding machine arranged in the steel pipe, A cable storage portion that extends in the axial direction of the steel pipe and can store a plurality of cables therein, and a stand that supports the cable storage portion in a hollow portion inside the steel pipe, the cable storage portion, The cable receiving portion having a concave cross-sectional shape whose upper portion is opened and a lid body that closes the opened upper portion of the cable receiving portion, and the lid body rotates with respect to the cable receiving portion to A cable receiving jig is used to open and close the opened upper part of the cable receiving part.
[0010]
According to the present invention, since the cable receiving jig of the welding machine includes the cable storage portion extending in the axial direction of the steel pipe, the cables included in the welding machine are arranged and stored in the cable storage portion. Since the cables are simply placed in the cable storage portion, the cables are not bound to each other, and unnecessary binding force does not act on the cables. For this reason, when the welding head of a welding machine moves the inner peripheral surface of a steel pipe, cables are not entangled or kinked. In addition, since the cable storage portion is held in the hollow portion inside the steel pipe by the stand, there is no need to construct a rope or the like on the steel pipe and tie the cable to the rope.
[0011]
Further, by adopting such a configuration, even when the welding head moves on the inner peripheral surface of the steel pipe, the lid body closes the upper portion of the cable receiving portion when welding, so that the stored cable is received by the cable receiving portion. There is no separation outside the department.
[0012]
And in this invention, in the said cable receiving jig , the said stand is provided with the overhang | projection part which can be expanded-contracted in the height direction, The edge part of this overhang | projection part is pressed on the internal peripheral surface of the said steel pipe, and the said steel pipe The stand is fixed at a predetermined position.
[0013]
When the number of welding machines arranged inside the steel pipe increases, the cable received by the cable receiving jig of the welding machine according to the present invention becomes a considerable weight. Even in such a case, it is necessary to prevent the cable receiving jig of the welding machine from falling due to the weight of the cable. According to the configuration employed by the present invention, the stand is reliably maintained by the steel pipe.
[0014]
Moreover, the pipe diameter of the steel pipe to be welded varies depending on the steel pipe. If the cable receiving jig of the welding machine is prepared for each pipe diameter of the steel pipe, not only the manufacturing cost but also the management cost is required. According to the cable receiving jig of the welding machine of the present invention, the height can be adjusted according to the pipe diameter of the steel pipe, and it can be dealt with by the cable receiving jig of one welding machine.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
FIG. 1 shows a state in which steel pipes 1... 1 are welded using a cable receiving jig 10 of a welding machine according to an embodiment of the present invention. A plurality of steel pipes 1... 1 are connected in the axial direction, and each connecting portion of the steel pipes 1... 1 is automatically welded to form one pipeline. Inside the steel pipes 1... 1, a plurality of welding machines are arranged at predetermined intervals in the axial direction of the steel pipes 1. The steel pipes 1 ... 1 are welded from the inside by these welding machines.
[0017]
The welding machine for welding the steel pipes 1 ... 1 travels in the circumferential direction along the inner peripheral surface of the main pipe 2 and the steel pipes 1 ... 1 to generate currents and voltages of predetermined values, melts the welding wire, and the steel pipes 1 ... 1. It consists of a welding head 3 for welding together one another, a cable 4 connecting a power source (not shown) and the main body 2 of each welding machine, and a cable 5 connecting the main body 2 and the welding head 3. Moreover, the guide rail extended in the circumferential direction is provided in the connection part of each steel pipe 1 ... 1 along the inner peripheral surface of the steel pipe 1 ... 1, The said welding head 3 is steel pipe 1 along these guide rails. ... runs in the circumferential direction inside 1. In addition, the main body 2 of the welding machine is mounted on the transport carriage 6 so that it can be easily moved inside the steel pipes 1.
[0018]
And in the inside of steel pipe 1 ... 1, the cable receiving jig 10 concerning this invention is provided so that two or more may be provided in the axial direction of steel pipe 1 ... 1, and connects the power supply and the main body 2 of each welding machine. The cable 4 and the cable 5 connecting the main body 2 and the welding head 3 are supported by the cable receiving jig 10.
[0019]
Each cable receiving jig 10 has a cylindrical cable storage portion 11 extending in the axial direction of the steel pipes 1... 1 at the substantially central portion in the diameter direction of the steel pipes 1. It is comprised from the stand 16 supported at both ends, respectively. As is apparent from FIG. 1, the cable storage portion 11 is formed slightly shorter than the length of each steel pipe 1... 1 and extends from the main body 2 to the welding head 3 at a position corresponding to each connection portion of the steel pipe. The cable can be extended to the outside of the cable housing portion 11.
[0020]
For this reason, the cables 4 and 5 are connected to the outside from the cable receiving jig 10 toward the welded part A on the right side of FIG. 1 from the welded part A near the power source (not shown) provided on the left side of FIG. The number of the cables 4 and 5 accommodated in the cable receiving portion 10 of the cable receiving jig 10 that is sequentially extended and arranged on the right side of FIG.
[0021]
2 is a view of the cable receiving jig 10 of the welding machine as viewed from the axial direction of the steel pipes 1... 1, and FIGS. 3 to 5 are cable housing portions 11 constituting the cable receiving jig 10 of the welding machine. FIG.
[0022]
As shown in FIG. 2, the stand 16 holding the cable housing portion 11 is pressed against the inner peripheral surface of the steel pipe 1... 1 with its upper and lower ends directed outward in the diameter direction of the steel pipe 1. 1... 1 are maintained so as to maintain a self-supporting state. The stand 16 is provided with a support column 17 provided so as to extend in the vertical direction, a cylindrical holder 18 provided so as to hold the outer peripheral surface of the support column 17, and movable along the axial direction of the support column 17; At the upper end of the stand 16, there is provided an overhanging portion 23 provided so as to be expandable and contractable in the axial direction with respect to the support column 17.
[0023]
A cylindrical holding portion 24 having a female screw formed therein is provided at the upper end of the support post 17, and the overhanging portion 23 is screwed to the support portion 24 and attached to the support post 17. The projecting portion 23 is a rod-shaped rod 25 that is screwed into a holding portion 24 provided at the upper end of the support column 17, and a disk-shaped contact portion 26 that is attached to the upper end of the rod 25 and contacts the inner surface of the steel pipe 1. It consists of and. A male screw is formed on the outer peripheral surface of the rod 25. The male screw is engaged with the female screw of the holding portion 24, and the overhanging portion 23 is rotated with respect to the holding portion 24. Stretch in the axial direction. Using this action, the length of the support column 17 is changed, and the overhanging portion 23 is pressed against the inner peripheral surface of the steel pipes 1.
[0024]
On the other hand, a holder 18 that holds the outer peripheral surface of the support column 17 is formed in a cylindrical main body 19, a side projecting side of the main body 19, and a mounting unit 20 on which the cable storage unit 11 is mounted. A stopper 21 is provided on a side opposite to the mounting portion 20 and fixes the holder 18 to a predetermined position of the support column 17. The stopper 21 has its tip screwed into a screw hole formed on the side surface of the main body portion 19, and penetrates the main body portion 19 to press the tip surface against the outer peripheral surface of the column 17, thereby holding the holder 18 in the column 17. It is fixed at a predetermined position.
[0025]
The cable storage portion 11 placed on the placement portion 20 of the holder 18 is formed in a long cylindrical shape, and the cables 4 and 5 are accommodated therein. The cable storage portion 11 occupies the lower portion thereof, and is attached to the cable receiving portion 12 in which the cables 4 and 5 are stored, and the cable receiving portion 12 so as to be rotatable. The upper portion of the cable receiving portion 12 is opened and closed. The lid body 13 is configured to be configured.
[0026]
The cable receiving portion 12 is formed in a semicircular shape in cross section in a direction orthogonal to the axial direction, and its upper portion is open. On the other hand, the lid 13 that opens and closes the upper portion of the cable receiving portion 12 is also formed in a semicircular cross-sectional shape in a direction orthogonal to the axial direction, and when the cable receiving portion 12 is closed with the lid 13, A long cylindrical body is formed.
[0027]
A butterfly plate 15 is attached to one side end of the cable receiving portion 12, and one side end of the lid 13 is attached to the cable receiving portion 12 via the butterfly plate 15. The butterfly plate 15 freely rotates the lid 13 with respect to the cable receiving portion 12, and the lid 13 opens and closes an open portion formed on the upper portion of the cable receiving portion 12. On the other hand, a clasp 14 is attached to the other side end of the cable receiving portion 12 and the lid 13. A female member 14a constituting a clasp 14 is attached to the cable receiving portion 12, a male member 14b fitted to the male member 14b is attached to the lid body 13, and the male member 14b of the lid body 13 is connected to the cable receiver. The closed state is maintained by fitting with the female member 14a of the portion 12. The stopper plate 14 is configured so that the fitting between the male member 14b and the female member 14a is released with one touch.
[0028]
According to the cable receiving jig 10 of the welding machine having the above configuration, the cables 4 and 5 accommodated in the cable accommodating portion 11 are not restricted by the other cables 4 and 5 and are hollow portions of the steel pipes 1. Supported by Therefore, even if the head moves in the circumferential direction along the inner peripheral surface of the steel pipe 1... 1, no excessive force is applied to the cables 4, 5, and entanglement, kinking, kinking, kink, disconnection, etc. Does not occur.
[0029]
For example, in order to install the welding head 3 on the guide rail, as shown in FIG. 6, when the cable 5 connecting the main body 2 of the welding machine and the welding head 3 is taken out from the cable storage portion 11, the cable storage portion 11 is not entangled with the other cables 4 and 5 accommodated in the cable 11. That is, since the cable receiving part 12 which comprises the cable storage part 11 has sufficient volume which can accommodate the some cables 4 and 5 in the inside, the cables 4 and 5 do not restrain each other. For this reason, the cable 4 can move relatively freely inside the cable storage portion 11. For this reason, even when the cable 4 is taken out, the cables 4 and 5 are prevented from being loosened and entangled. For this reason, an excessive force is not applied to the cables 4 and 5, and kink and disconnection are reliably prevented.
[0030]
In the cable storage portion 11 according to the present invention, the upper portion of the cable receiving portion 12 is closed by the lid body 13. For this reason, even if the cables 4 and 5 move around the inside of the cable housing portion 11 during work, the lid 13 reliably prevents the cable 14 from falling off as shown in FIG. Thereby, the state organized until the end of work can be maintained.
[0031]
The case where the cross-sectional shapes of the cable receiving portion 12 constituting the cable storage portion 11 and the lid body 13 that opens and closes the upper portion thereof are formed in a semicircular shape has been described as an example, but the present invention is not limited to this. . For example, the cross-sectional shape of the cable receiving portion may be provided in a rectangular shape, and the opened upper and lower lid may be provided as a flat plate material.
[0032]
【The invention's effect】
As described above, according to the present invention, since the cable receiving jig of the welding machine includes the cable storage portion having the lid that can be opened and closed, it is extremely easy to extend the cable in the axial direction of the steel pipe in an organized state. Can be. Moreover, since the cable receiving part which comprises a cable storage part is provided in the inside so that a several cable can be accommodated, it does not apply an excessive force to a cable and kink and a disconnection are prevented effectively. Moreover, since the height of the cable housing portion can be adjusted, it is possible to respond flexibly according to the circumferential welding position. And the stand which supports a cable storage part presses the inner peripheral surface of a steel pipe toward a diameter direction outer side, and since a stand is fixed firmly by this, it will prevent falling. In addition, since the length of the stand can be expanded and contracted, it can be used according to the pipe diameter of the steel pipe.
[Brief description of the drawings]
FIG. 1 is a view showing a state in which a steel pipe is welded using a cable receiving jig of a welding machine according to an embodiment of the present invention.
FIG. 2 is a view of the cable receiving jig of the welding machine shown in FIG. 1 as viewed from the axial direction of the steel pipe.
FIG. 3 is a side view of a cable storage portion constituting a cable receiving jig of a welding machine.
4 is a cross-sectional view of the cable housing portion shown in FIG.
FIG. 5 is a view showing a state in which a lid of a cable storage unit is opened.
FIG. 6 is an explanatory view showing the operation of the present invention in a state of a cable housing portion in which a plurality of cables are housed.
FIG. 7 is an explanatory diagram showing an operation different from that of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Steel pipe 2 Welding machine main body 3 Welding head 4,5 Cable 10 Welding machine cable receiving jig 11 Cable storage part 12 Cable receiving part 13 Cover 14 Stopper 15 Butterfly board 16 Stand 17 Post 18 Holder 23 Overhang part

Claims (4)

A cable arrangement method of a welding machine performed when welding a steel pipe from the inside thereof, wherein a plurality of the welding machines are arranged in the steel pipe corresponding to a plurality of circumferential welding positions in the axial direction of the steel pipe, and A cable receiving jig that receives the cable of the welding machine is placed in the steel pipe, and the cable of the welding machine is received by the cable receiving jig so as to extend in the axial direction of the steel pipe without restraining each other. The welding machine cable placement method, wherein the welding machine cable is sequentially extended from the cable receiving jig at a position where the welding machine cable is to be installed. The method for arranging a cable for a welding machine according to claim 1, wherein a height at which the cable for the welding machine is arranged is adjusted by the cable receiving jig . A welding machine cable receiving jig for receiving a cable of a welding machine arranged in a steel pipe when the steel pipe is welded from the inside of the steel pipe, and extending in the axial direction of the steel pipe to be welded. A cable storage portion capable of storing a cable of the cable, and a stand for supporting the cable storage portion in the hollow portion inside the steel pipe, wherein the cable storage portion is a cable receiving portion having a concave shape with an open top. And a lid that closes the opened upper portion of the cable receiving portion, and the lid rotates with respect to the cable receiving portion to open and close the opened upper portion of the cable receiving portion. Cable receiving jig characterized by The stand is provided with a projecting portion that can extend and contract in the height direction, and the end of the projecting portion is pressed against the inner peripheral surface of the steel pipe to fix the stand to a predetermined position of the steel pipe. The cable receiving jig according to claim 3.

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