JP3248893B2 - Cable multi-drawing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is, for example, relates to a power cable and control cable multi-strip pulling extension line construction method of the cable in the cable laying construction of the plant construction.

[0002]

2. Description of the Related Art Generally, cables such as power cables and control cables are wired to equipment. For example, in plant construction, the cable wiring length of power cables and control cables is several kilometers and hundreds of cables. It can extend to

FIG. 10 is a schematic view showing an example of a conventional cable drawing method. In the figure, 1 is a cable, and 2 is a cable drum around which the cable 1 is wound. Reference numeral 3 denotes a drum roller on which the cable drum 2 is mounted. The drum roller 3 is configured such that the rollers 3a and 3b are rotatably mounted on a frame-shaped base 3c with a predetermined gap so that their axes are parallel to each other. ing. The roller 3a can be driven to rotate by a driving device (not shown). Reference numeral 4 denotes a bunker, and reference numeral 5 denotes a ball-drawing machine installed at various points along the wire-drawing route of the cable 1. The ball-drawing machine 5 has a pair of rotating shafts arranged parallel to each other and a spherical ball 5 is provided.
a is fixed to each of the pair of rotating shafts, and the pair of rotating shafts are driven to rotate in opposite directions so that the cable 1 sandwiched between the pair of balls 5a is sent out in a predetermined direction. I have. Reference numeral 6 denotes a corner roller which is formed in a cylindrical shape having an arc-shaped concave surface so as to be rotatable around an axis. The corner roller 6 is provided at a corner of the extension path of the cable 1. Cable 1
I will guide you. Reference numeral 7 denotes a roller which is installed between the ball drawing machines 5 to prevent the cable 1 from hanging down and rotates to smoothly run the cable 1, and 8 denotes a winch for pulling the cable 1.

[0004] Next, the above-mentioned conventional cable extension work will be described. First, before the cable 1 is extended, a cable tray (not shown) is laid over the entire length of the cable 1 laying path. Then, along the cable laying route, that is, along the cable tray, the ball drawing machine 5
Will be installed everywhere. Then, the corner rollers 6 are installed at the corners of the wire drawing route of the cable 1, and the rollers 7 are installed between the ball drawing machines 5. Further, the drum roller 3 on which the cable drum 2 is placed is installed at the start end of the extension path of the cable 1, and the winch 8 is installed at the end side of the extension path of the cable 1. Then, while moving along the extension route with a rope such as a towel rope, the operator first hangs the car 4 from the start end side, and then sequentially hangs the ball wire drawing machine 5, the corner roller 6, and the roller 7 in sequence. . Then, after moving to the end side, the leading end side of the rope is wound around the drum of the winch 8. Further, the rear end of the rope is connected to the front end of the cable 1 wound around the cable drum 2.

Then, the winch 8 is driven to start pulling the rope. At the same time, the roller 3a is rotationally driven to rotate the cable drum 2, and the feeding of the cable 1 is started. Further, each ball drawing machine 5 is driven. At first, the cable 1 sent out from the cable drum 2 is towed along the wire drawing path from the starting end side by the pulling force of the winch 8 and the feeding force of the ball drawing machine 5 via the rope. When the leading end of the cable 1 reaches the ball drawing machine 5, the feed force of the ball drawing machine 5 directly acts on the cable 1 and moves. When the end of the cable 1 reaches the end of the wire drawing path, the driving of the winch 8, the ball wire drawing machine 5, and the roller 3a is stopped. Next, the cable 1 on the cable drum 2 side is cut, and a cable 1 of a predetermined length is cut.
And Then, the cable 1 is moved into the cable tray, and the work of extending one cable 1 is completed. The above-mentioned operation is repeated, and a predetermined number of cables 1 are extended. Then, the equipment such as the ball drawing machine 5, the corner roller 6, the roller 7, etc. installed along the line drawing path is removed,
Cable extension work is completed. The extended cables are collectively accommodated in the cable tray in a state where the cables are arranged.

In the above-described conventional cable drawing method, the cables 1 are drawn one by one. Therefore, in a plant construction where the number of cables 1 is several hundred, the cables 1 are not used.
However, there has been a problem that it is not possible to shorten the construction period and reduce the cost.

[0007] In order to solve the above problem, a multi-strand drawing in which the ends of a plurality of cables 1 are collectively connected to a rope and simultaneously drawn is attempted, but the feeding force of the ball drawing machine 5 is applied to the plurality of cables 1. The cables were delayed and advanced within the plurality of cables 1 without being added evenly. As a result, the cable 1 is bent or the cable 1 is derailed from the ball wire drawing machine 5, so that the multiple wire drawing of the cable 1 cannot be realized. In addition, cable 1
When the bending occurs, it is necessary to manually drive the ball drawing machine 5 individually to send the bending amount of the cable 1 forward to remove the bending of the cable 1, and the wire drawing workability is increased. There is a problem that the wire drawing work time is prolonged as much as it is reduced.

As a remedy, there has been proposed a multi-cable cable drawing method in which a plurality of cables 1 are bundled and simultaneously drawn as one cable.

FIG. 11 is a schematic view showing a conventional multi-cable cable drawing method. In the figure, reference numeral 9 denotes a caterpillar wire drawing machine for sending out the cable 1 sent out from the cable drum 2 to a subsequent stage, 10 denotes a junk car arranged after the caterpillar drawing machine 9, and 13 denotes a series after a junk car 10. This is a binding device including two arranged binding devices 11 and a ball driving device 12 as a cable sending device.

Next, the above-mentioned conventional cable extension will be described. First, before the cable 1 is extended, a cable tray (not shown) is extended over the entire length of the cable 1 laying path. Next, the ball wire drawing machine 5 is installed everywhere along the wire drawing route of the cable 1, that is, along the cable tray. Then, the corner rollers 6 are installed at the corners of the wire drawing path, and the rollers 7 are installed between the ball wire drawing machines 5.
Then, three cable rollers 3 are installed at the starting end of the wire drawing path, and three caterpillar wire drawing machines 9 are installed at the subsequent stage. Then, after the caterpillar wire drawing machine 9, Jun Car 1
0, two binding machines 11, a ball driving device 12, and a bun 4 are installed in a series. On the other hand, a winch 8 is installed on the end side of the extension route.

Therefore, while moving along the extension route with a rope such as a towel rope, the operator first hangs on the Jun 4 from the starting end side, and then successively places the ball on the wire-drawing machine 5, the corner roller 6, and the roller 7. I will hang it. Then, after moving to the end side, the leading end side of the rope is wound around the drum of the winch 8. Further, the roller a of each cable roller 3 is rotationally driven to rotate the cable drum 2, and the cable 1 is sent out. The sent cables 1 are respectively guided to the caterpillar drawing machine 9. Then, the cable 1 sent out by the caterpillar wire drawing machine 9 is hanged on the Jun 10
Three pieces are simultaneously supplied to the binding machine 11. 3 cables 1
Are bound at predetermined intervals by a binding string by two binding machines 11, and then sent out to a subsequent stage by a ball driving device 12. After that, the driving of the roller 3a, the caterpillar drawing machine 9, the binding machine 11, and the ball driving device 12 is stopped. Therefore, the rear end of the rope is connected to the front end of a bundled cable 100 formed by binding three cables 1.

At this point, the winch 8 is driven to start pulling the rope. At the same time, the driving of the roller 3a, the caterpillar drawing machine 9, the binding machine 11, and the ball driving device 12 is started. Further, the ball drawing machine 5 is driven. The three cables 1 sent out from the three cable drums 2 are 2
Are bound at predetermined intervals by a binding string by one binding machine 11,
The binding cable 100 is sent out via the ball driving device 12. And this binding cable 100 is
Initially, it is towed along the wire drawing path by the pulling force of the winch 8 and the feed force of the ball drawing machine 5 via the rope. The binding cable 100 is hung on the vehicle 4 and once hung, and then guided to the ball drawing machine 5. When the leading end of the binding cable 100 reaches the ball drawing machine 5, the feed force of the ball drawing machine 5 directly acts to move.
When the end of the binding cable 100 reaches the end of the wire drawing path, the driving of the roller 3a, the caterpillar wire drawing machine 9, the binding machine 11, the ball wire drawing machine 5, the ball driving device 12, and the winch 8 is stopped. Then, ball drawing machine 1
The bundled cable 100 is cut at the subsequent stage of 2 to obtain a bundled cable 100 having a predetermined length. Therefore, the binding cable 1
00 in the cable tray and three cables 1
The extension work is completed at once.

The above operation is repeated to extend a predetermined number of cables 1. Then, the ball wire drawing machine 5, the corner rollers 6, the rollers 7 installed along the wire drawing path.
And other equipment are removed, and cable extension work is completed. The extended cables are collectively accommodated in a cable tray. Thus, the time required for extending the cable 1 can be greatly reduced, and the construction period can be shortened and the cost can be reduced.

[0014]

As described above, in the conventional multi-cable cable drawing method, a plurality of cables 1 are bundled to form a single bundled cable 100, and the cables 1 are bundled. Since the cable tray is housed in the cable tray in a state, there is a problem that the space factor is reduced.
Further, the binding cable 100 is twisted during the extension. Then, when the binding cable 100 is transferred into the cable tray, the binding of the cable is released.
The cable 1 rebounds due to the torsional stress remaining therein, causing the cables 1 to be entangled with each other. Therefore, there is a problem that even if the cables are untied, it is difficult to arrange the cables, a great amount of time is required for the arrangement of the cables, and it is difficult to lay the cables in a regular state (in a state where the cables are arranged).

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to reduce the twisting between cables and to simultaneously extend the wires without bundling a plurality of cables. it is possible to achieve cost reduction, increasing the space factor of the cable to be accommodated in the cable tray, and an object thereof is to obtain a cable multi strip pull extension line construction method that allows cabling that is organizing organ .

[0016]

According to the present invention, there is provided a cable multi-drawing / drawing method according to the present invention, wherein each of the plurality of grooves is formed into a cylindrical outer shape, and a plurality of grooves are arranged on an outer peripheral surface along an axial direction. A cable drawing machine provided with a pair of balls provided and a motor for rotating and driving the pair of balls is arranged at predetermined intervals along a cable drawing path, and a cable guide portion for guiding the cable is defined. A plurality of straightening corner rollers arranged side by side are installed at the corners of the extending route with the direction of juxtaposition of the cable guides substantially vertically oriented, and the cable guides for guiding the cables are divided into a plurality of sections. At least one straightening roller arranged in parallel is installed between adjacent cable drawing machines so that the direction of the cable guide is parallel to the direction in which the wire drawing path is blocked, and a plurality of the plurality of straightening rollers are provided at the starting end side of the wire drawing path. Of Arranging the cable drums, connecting the plurality of cables fed from each of the plurality of cable drums to the tow ropes through the respective return loops, and pulling the tow ropes while pulling the cable. When the operator guides the cable, when the return passes through the cable drawing machine, the straightening corner roller and the straightening roller, each of the plurality of cables is Guiding in each of the grooves of the pair of balls of the cable drawing machine, guiding each of the cable guides of the straightening corner roller, and guiding to each of the cable guides of the straightening roller.

A winch is disposed at the rear end of the cable extending path, and the tow rope is wound around a drum of the winch, and the winch is driven to drive the tow rope. Things.

Further, the tow rope is a loop-like tow rope.

Further, the tow rope is formed to have a length substantially equal to the distance between the adjacent cable drawing machines, and a worker for rope tow pulls the tow rope to a pair of balls of the cable drawing machine. Walking along the extension line while pulling while biting in between, and controlling the drive of the cable drawing machine to adjust the movement speed of the cable according to the walking movement speed along the extension line It is something to do.

[0020]

[0021]

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. FIG. 1 is a schematic view showing a cable multi-drawing method according to Embodiment 1 of the present invention, and FIG. 2 is a schematic view showing a main part of a cable multi-drawing method according to Embodiment 1 of the present invention. It is. 1 and 2, reference numeral 1 denotes a cable, and 2 denotes a cable drum around which the cable 1 is wound. Reference numeral 3 denotes a drum roller on which the cable drum 2 is mounted. The drum roller 3 is configured such that the rollers 3a and 3b are rotatably mounted on a frame-shaped base 3c with a predetermined gap so that their axes are parallel to each other. ing. In addition,
The roller 3a can be driven to rotate by a driving device (not shown). 8 is a winch for pulling the cable 1, 9 is a cable 1 sent out from the cable drum 2
Is a caterpillar wire drawing machine, which is disposed downstream of the caterpillar wire drawing machine 9, 19 is a toll rope as a tow rope, and the toer rope 19 is branched into three at the rear end. . Reference numeral 20 denotes a cable drawing machine installed at various points along the wire drawing route of the cable 1, and reference numeral 21 denotes a cable drawing machine installed at a corner of the wire drawing route of the cable 1.
Corner roller that guides the cable, 22 is the cable drawing machine 2
Alignment roller installed between 0 and guiding cable 1, 23
Is connected to the towel rope 19 and the cable 1 to reduce the stress caused by the torsion of the cable 1.

As shown in FIG. 3, the cable drawing machine 20 has a pair of balls 30 mounted on a pair of rotating shafts erected on a main surface of a gantry 31 with a predetermined gap therebetween. The motor 32 for driving the shaft is
It is configured to be attached to. The ball 30 is made of a rubber material, is formed into a hollow substantially cylindrical shape, and has air sealed therein. On the outer peripheral surface of the ball 30, three circumferential grooves 30a are provided along the axis. One ball 30 is attached to the rotating shaft so that the circumferential grooves 30a face each other. In the cable drawing machine 20, when the motor 32 is rotationally driven, the pair of balls 30 are rotated in opposite directions, and the cable 1 sandwiched between the pair of balls 30 can be sent out in a predetermined direction. I have.

[0024] As shown in FIG.
One roller 35 is rotatably attached to the gantry 37 so that the rotation axis is parallel to the main surface of the gantry 37, and
The roller 36 is configured to be rotatably mounted on the gantry 37 in parallel with the rotation axis of the roller 35 so that the rotation axis is orthogonal to the main surface of the gantry 37. And the gantry 37
A long hole 37a is formed in the main surface of the base 3 in parallel with the rotation axis of the roller 35, and the roller 36 is connected to the base 3 through the long hole 37a.
7 so that the clearance between the rollers 36 can be adjusted according to the diameter of the cable 1. Similarly, the number of rollers 36 can be adjusted according to the number of cables 1. The roller 35
And a pair of adjacent rollers 36 constitute a cable guide. The three cables 1 are separated and stored between the rollers 36. Then, the cable 1 is pulled while rotating the rollers 35 and 36, and the slack is suppressed and the cable 1 is smoothly moved.

As shown in FIG. 5, the straightening corner roller 21 is configured such that a roller 40 is rotatably attached to a U-shaped frame 41. The roller 40 is formed in a columnar shape, and is provided with three circumferential grooves 40a as cable guide portions along the axis. 3 cables 1
Are separated and stored in each groove 40a. Therefore, the cable 1 is pulled while rotating the roller 40, and is smoothly moved in a state where each cable can be specified.
The return 23 is, as shown in FIG.
A first grip 43 connected to one side of the connecting portion 42 so as to be rotatable around a pin 45, and a second grip portion connected to the other side of the connecting portion 42 so as to be rotatable around a shaft 46. 44. The axis of the pin 45 and the axis of the shaft 46 are orthogonal to each other. In addition, the first and second
Are provided with pins 43a, 44a to which the cable 1 and the towel rope 19 are connected.

Next, the cable multi-drawing method will be described. First, before extending the cable 1,
A cable tray (not shown) extends over the entire length of the cable laying path. Next, the cable drawing machines 20 are installed at predetermined intervals along the wire drawing route of the cable 1, that is, along the cable tray. Then, a straightening corner roller 21 is installed at a corner of the wire drawing route, and a straightening roller 22 is installed between the cable drawing machines 20. At this time, the straightening corner rollers 21 are disposed so that the rotation axis of the rollers 40 is oriented in the vertical direction, and the straightening rollers 22 are horizontal so that the rotation axis of the roller 35 blocks the extension path. It is arranged.
Then, three cable rollers 3 are installed at the start end side of the wire drawing route, three caterpillar wire drawing machines 9 are installed at the subsequent stage, and a trolley 10 is installed at the subsequent stage. On the other hand, a winch 8 is installed on the end side of the extension route.

Then, while the operator moves along the wire drawing path with the towel rope 19, the cable drawing machine 20, the aligning roller 22, and the aligning corner roller 21 are arranged from the starting end side.
It is multiplied sequentially. Then, after moving to the end side, the tip side of the towel rope 19 is wound around the drum of the winch 8. In addition, the cable 3 is sent out by rotating the roller 3a of each cable roller 3 to rotate the cable drum 2. The sent cables 1 are respectively guided to the caterpillar drawing machine 9. Then, the cable 1 sent out by the caterpillar wire drawing machine 9 is hung on a bunker 10.
Then, the tip of the cable 1 is connected to the pin 4 of the first gripper 43.
3a, and return 23 is connected to each of the three cables 1. Then, each of the branched rear ends of the towel rope 19 is returned from each, and the pin 4 of the second gripper 44 of the
4a, and the three cables 1 and the towel rope 19 are connected via a return 23.

Here, the winch 8 is driven to start pulling the towel rope 19. At the same time, the roller 3a, the caterpillar drawing machine 9 and the cable drawing machine 20 are driven. 3
The three cables 1 sent out from the cable drums 2 are towed along the wire drawing path by the pulling force of the winch 8 via the towel rope 19 and the feeding force of the cable drawing machine 20 at first. When the end of the cable 1 reaches the cable drawing machine 20, the cable drawing machine 20
Is moved directly by the feed force. At this time, the worker moves along the extension path together with the return 23. Then, while moving, at the position of each cable drawing machine 20, the uppermost groove 30 a of the pair of balls 30 is moved.
The three cables 1 are guided between the pair of balls 30 so that the same cable 1 passes through the gaps, between the central grooves 30a, and between the lowermost grooves 30a. Similarly, at the position of each alignment roller 22, three cables 1 are connected to each other so that the same cable 1 always passes between the three rollers 36 divided in the rotation axis direction of the roller 35. Each is guided between the rollers 36. Similarly, at the position of each alignment corner roller 21, the uppermost groove 40 a, the central groove 40 a, and the lowermost groove 40
Each of the three cables 1 is guided to the groove 40a of the roller 40 so that the same cable 1 always passes through a.

When the guide operation by the operator is completed,
The three cables 1 pass between the pair of balls 30 while maintaining the arrangement order in the axial direction in each cable drawing machine 20, pass between the rollers 35 at the same position in each straightening roller 22, and The line corner rollers 21 pass through the groove 40a at the same position. If the cable 1 is twisted during the extension of the cable 1, the torsion stress causes the first connecting portion 43 to rotate around the pin 45 or the connecting portion 42 to rotate around the shaft 46, thereby causing the stress due to the torsion. Are alleviated and are not accumulated in the cable 1. When the end of the cable 1 reaches the end of the wire drawing path, the driving of the roller 3a, the caterpillar wire drawing machine 9, the cable drawing machine 20, and the winch 8 is stopped. Next, the connection between the cable 1 and the return cable 23 is released, and the cable 1 is cut at the rear side of the vehicle 10 to obtain three cables 1 having a predetermined length. Therefore, a plurality of workers are assigned to various places in the wire drawing route, and the cables 1 are transferred one by one while being arranged in the cable tray, and the wire drawing work of the three cables 1 is completed at once.

The above operation is repeated to extend a predetermined number of cables 1. And the cable drawing machine 20 installed along the wire drawing route,
1. The equipment such as the straightening roller 22 is removed, and the cable extension work is completed. The extended cables are collectively accommodated in the cable tray in a state where the cables are arranged.

As described above, in the first embodiment, since three cables 1 can be extended at a time, even in a plant construction where the number of cables 1 is as large as several hundred, the extension time of the cables 1 can be extended. Can be shortened, and the construction period can be shortened and the cost can be reduced. Also, since the three cables 1 are connected to the towel rope 19 via the return cable 23,
Even if the cable 1 is twisted during extension, the stress due to the twist is alleviated by the return 23 and is not accumulated in the cable 1. Therefore, cable 1
When the cable is cut, it is possible to prevent the cable 1 from jumping due to the residual torsional stress and to entangle the three cables 1, so that the work of transferring the cable 1 to the cable tray and the work of straightening can be simplified. Become. In addition, cable drawing machine 2
0 is formed into a substantially columnar shape and has a circumferential groove 30a.
Is provided with balls 30 arranged side by side along the axis, and a straightening corner roller 21 is formed into a substantially cylindrical shape, and provided with rollers 40 provided with a plurality of circumferential grooves 40a in the axial direction on the outer peripheral surface thereof. In addition, since the straightening rollers 22 are disposed between the cable drawing machines 20, the three cables 1 are surely maintained in the arrangement state, and are intertwined in a state where each of the three cables 1 can be specified. The wire can be extended without sag and without sag. Therefore, at the time of cable drawing, there is no need for an operator to guide the cable 1 on the cable drawing machine 20, the aligning roller 22, and the aligning corner roller 21, thereby saving labor of the wire drawing operation. Furthermore, at the time of transferring the cable 1 to the cable tray, a plurality of workers arranged on the extension route can easily and surely identify the cable 1 to be transferred, and the transfer and straightening work can be simplified. become.

Therefore, according to the first embodiment, shortening of the construction period and reduction in cost are achieved, the space factor of the cables accommodated in the cable tray is increased, and the cables capable of laying out the arranged cables can be provided. A multi-strand drawing method can be obtained. In the first embodiment, three cables 1 are described as being extended at the same time. However, the number of cables 1 to be extended is not limited to three, but may be two or four. It goes without saying that the present invention can be applied to a case where more than one cable 1 is simultaneously extended.

Next, the characteristics of the wire drawing machine 20 will be described with reference to FIGS. 7 and 8 in comparison with the cable drawing machine 20 and the conventional ball drawing machine 5. FIG. Here, a case where five cables 1 are collectively extended will be described.
First, a conventional ball wire drawing machine 5
The case where is applied will be described. 5 cables 1
Are collectively guided between a pair of balls 5a of the ball drawing machine 5, as shown in FIG. Therefore, the contact area between the ball 5a and the cable 1 is different in each cable 1, and a difference occurs in the feed force acting on each cable 1. As a result, a difference occurs in the tension of each cable 1 and the cable 1 is loosened or twisted. In particular,
If there is a cable 1 that does not contact the ball 5a, only a feed force caused by a frictional force between the cables 1 that is extremely small as compared with a frictional force between the ball 5a and the cable 1 acts on the cable 1, and the cable 1 is extended. A situation where lines are not drawn occurs.
Further, when the five cables 1 are led together between the pair of balls 5a of the ball wire drawing machine 5, each cable 1 tends to be arranged along the rotation axis of the balls 5a. However, in the ball wire drawing machine 5, there is no mechanism for regulating the arrangement state of the balls 5a of the cable 1 along the rotation axis, and the arrangement operation of each cable 1 is shown in FIGS. 7B and 7C. As described above, the ball wire drawing machine 5 differs. Therefore, a situation occurs in which the five cables 1 are entangled and the cable 1 cannot be specified. Also, five cables 1
As shown in FIG. 7 (d), when the pieces are guided together between the pair of balls 5a of the ball wire drawing machine 5,
Due to the spherical outer shape of a, a force in a direction away from the ball 5a along the rotation axis of the ball 5a acts on the cable 1. Therefore, a part of the cable 1 comes off from between the pair of balls 5a during the wire drawing, and a situation where the wire is not drawn occurs.

Next, a case where the cable drawing machine 20 is applied to the drawing of five cables 1 will be described. In this cable drawing machine 20, the balls 30 are formed into a cylindrical outer shape, and circumferential grooves 30a are arranged side by side along the axis. As shown in FIG. 8, the five cables 1 are accommodated in the grooves 30a facing each other, and pass between the pair of balls 30 while being arranged in a line in the axial direction. Therefore, the contact area between the ball 30 and the cable 1 becomes substantially equal in each cable 1, and a uniform feeding force acts on each cable 1. As a result, each cable 1 is extended with the same tension, and the occurrence of loosening and twisting of the cable 1 is suppressed. In addition, since there is no cable 1 that does not contact the ball 30, a situation where some of the cables 1 are not extended does not occur. Further, once the five cables 1 are guided between the opposing balls 30, the arrangement state of the five cables 1 along the rotation axis of the balls 30 is maintained, and the entanglement of the five cables 1 is prevented. . Furthermore, in each cable drawing machine 20, if the arrangement order along the rotation axis of the ball 30 is made the same, the cable 1 can be specified from the arrangement position of the cable 1. Further, a force in a direction of detaching from the ball 30 along the rotation axis of the ball 30 does not act on the cable 1, and it is possible to prevent a situation in which a part of the cable 1 is detached from between the pair of balls 30 during extension. .

In the case where the distance between the cable drawing machines 20 installed on the straight portion of the wire drawing path is long, a plurality of straightening rollers 22 may be provided between the cable drawing machines 20. If each straightening roller 22 is installed so that the rotation axis of the roller 35 rises as it approaches the cable drawing machine 20, a large number of cables 1 can be moved up and down from the cable drawing machine 20 at the preceding stage. The arrangement state in the direction is gradually inclined by the straightening rollers 22 to become a horizontal arrangement state, and then gradually rises and becomes an arrangement state in the up and down direction, and is guided to the cable drawing machine 20 at the subsequent stage. As a result, the cable 1 travels smoothly, suppressing an increase in the traction load and suppressing the cable 1 from becoming loose or twisting. When there is a corner between the long cable drawing machines 20, a plurality of the straightening rollers 22 are arranged so that the rotation axis of the roller 35 rises as the cable 35 approaches the cable drawing machine 20 and the cornering roller 21. It may be installed.
In this case, a smooth traveling movement of the cable 1 is performed. Also, in the corner portion of the wire drawing route, if the straightening corner roller 21 sufficiently fulfills the function of separating and guiding a large number of cables 1, the cable drawing machine 2 is not necessarily required.
There is no need to install the straightening rollers 22 between zero.

Embodiment 2 In the first embodiment, the cable drawing machine 20 is configured such that the pair of balls 30 is
Although the (valleys) and the convex portions (peaks) are arranged to face each other, in the second embodiment, as shown in FIG.
a (valley) and the convex portion (mountain) are arranged so as to face each other. Therefore, also in the second embodiment, as shown in FIG. 9, each cable 1 is accommodated between the corresponding groove 51a and the protruding portion and arranged along the rotation axis of the ball 51. The same effects as in the first embodiment can be obtained.

Embodiment 3 In the first embodiment, one long towel rope 19 is used.
Is wound around the drum of the winch 8 to pull the cable 1. In the third embodiment, a loop-shaped (endless) towel rope is used. It is towed. In the third embodiment, the loop-shaped towel rope is arranged along the extension path, and the towel rope is circulated between the starting end and the end side of the extension path during the towing operation by the winch 8. Therefore, the operator moves the towel rope with the cable extending machine 20 and the straightening roller 22 while moving the towel rope with the towel rope.
In addition, the work to be performed on the straightening corner rollers 21 is only required to be performed once at the first time, thereby saving labor.

Embodiment 4 FIG. In the above-described first embodiment, the tip of the towel rope 19 is wound around the drum of the winch 8 to pull the towel rope 19 and the cable 1 by the pulling force of the winch 8. 1
Is to be driven. That is, the fourth embodiment
In this embodiment, the length of the towel rope 19 is substantially equal to the distance between the adjacent cable drawing machines 20, and the towel rope 19 is pulled by human power without using the winch 8. The other structure is the same as that of the first embodiment. Have been.

Next, a description will be given of a cable multi-drawing method according to the fourth embodiment. First, cable 1
Prior to the extension, a cable tray (not shown) is extended over the entire length of the cable laying path. Then
Along the cable tray, the cable drawing machine 20 is installed everywhere. Then, a straightening corner roller 21 is installed at the corner of the wire drawing route, and the straightening roller 2 is placed between the cable drawing machines 20.
2 is installed. Then, three cable rollers 3 are installed at the start end side of the wire drawing route, three caterpillar wire drawing machines 9 are installed at the subsequent stage, and a trolley 10 is installed at the subsequent stage.

Therefore, the roller 3a of each cable roller 3
Is rotated to rotate the cable drum 2, and the cable 1 is sent out. The sent cables 1 are respectively guided to the caterpillar drawing machine 9. Then, the cable 1 sent out by the caterpillar wire drawing machine 9 is hung on a bunker 10. Therefore, the tip of the cable 1 is
And the return 23 is connected to each of the three cables 1. Then, the branched rear ends of the towel rope 19 are returned from the respective ends, and the second gripping portions 44 of the
, And the three cables 1 and the towel rope 19 are connected via the return 23.

Here, one worker operates the towel rope 1
9, while moving along the extension path, the rollers 3a,
The caterpillar drawing machine 9 and the cable drawing machine 20 are driven. Then, in each cable drawing machine 20, the worker moves along the wire drawing path while passing the towel rope 19 between the pair of balls 30. In addition, while another worker moves behind the preceding worker, at the position of each cable drawing machine 20, between the uppermost groove 30a of the pair of balls 30, between the central groove 30a and the uppermost one. Lower groove 30
a so that the same cable 1 passes between
Each of the cables 1 is guided between a pair of balls 30. Similarly, at the position of each straightening roller 22, the roller 3
The three cables 1 are guided between the rollers 36 so that the same cable 1 always passes between the three rollers 36 partitioned in the direction of the rotation axis 5. Similarly, at the position of each straightening corner roller 21, three cables are arranged so that the same cable 1 always passes through the uppermost groove 40 a, the central groove 40 a, and the lowermost groove 40 a of the roller 40. 1 is a groove 40a of each roller 40
To guide. The moving speed of the preceding worker fluctuates due to poor scaffolding on the extended route or up and down stairs. Therefore, the preceding worker adjusts the roller 3 according to his own moving speed.
a, The feed speed of the cable 1 is controlled by changing the speeds of the caterpillar drawing machine 9 and the cable drawing machine 20.
At this time, the leading worker may control the feed speed of the cable 1 so that another worker can easily guide the cable 1.

Once the guide operation by the operator is completed, the three cables 1 are automatically moved between the pair of balls 30 while maintaining the axial arrangement order in each cable drawing machine 20. Each roller 22 passes between the rollers 35 at the same position in each of the aligning rollers 22, and each of the aligning corner rollers 21
Pass through the groove 40a at the same position. When the cable 1 is twisted during the extension of the cable 1, the first connecting portion 43 causes the pin 45
The connection portion 42 rotates around the shaft 46, or the connection portion 42 rotates around the shaft 46, so that the stress due to the torsion is relieved and is not accumulated in the cable 1. When one set of workers reaches the end of the wire drawing path, the driving of the roller 3a, the caterpillar wire drawing machine 9 and the cable drawing machine 20 is stopped. Next, the connection between the cable 1 and the return cable 23 is released, and the cable 1 is cut off at the rear side of the vehicle 10 so that three cables 1 of a predetermined length are formed.
And Therefore, a plurality of workers are assigned to various places in the wire drawing route, and the cables 1 are transferred one by one while being arranged in the cable tray, and the wire drawing work of the three cables 1 is completed at once.

The above operation is repeated to extend a predetermined number of cables 1. And the cable drawing machine 20 installed along the wire drawing route,
1. The equipment such as the straightening roller 22 is removed, and the cable extension work is completed. The extended cables are collectively accommodated in the cable tray in a state where the cables are arranged.

Here, the three cables 1 sent from the three cable drums 2 move along the wire drawing path by the feed force of the roller 3a, the caterpillar drawing machine 9 and the cable drawing machine 20. Therefore, the preceding worker pulls only the towel rope 19. That is, the operator does not bear the weight of the cable 1.

As described above, also in the fourth embodiment, the same effects as in the first embodiment can be obtained. Further, according to the fourth embodiment, the length of the towel rope 19 is made substantially equal to the distance between the adjacent cable extending machines 20, and the extension of the extension line such as the state of the scaffolding of the extension route or the ascending or descending of the stairs. Since the feed speed of the cable 1 is controlled in accordance with the movement speed of the worker caused by the environment of the route, a winchless cable multi-strand drawing method that can easily guide the cable 1 can be obtained.

It is sufficient that the straightening roller has a plurality of partitioned cable guides, and the structure is not limited to the structure of the straightening roller 22 shown in FIG. Further, the alignment roller may have a plurality of partitioned cable guides, and is not limited to the structure of the alignment corner roller 21 shown in FIG. Further, the return may be configured so as to be rotatable with respect to the cable 1 and the towel rope 19, and is not limited to the structure of the return 23 shown in FIG. In each of the above embodiments,
The cable drum 2 is mounted on the drum roller 3, and the roller 3
The cable drum 2 is rotated to drive the cable 1 and the cable 1 is sent out. However, the drum roller 3 does not necessarily need to have a rotation drive source for the roller 3a. The cable 1 may be extended from the cable drum 2 by rotating the drum 2. Similarly, the caterpillar drawing machine 9 installed at the start end side of the cable drawing route can be omitted. Further, even if the caterpillar wire drawing machine 9 is a cable drawing machine 20, it can have the same function.

[0047]

Since the present invention is configured as described above, it has the following effects.

According to the present invention, a pair of balls each formed into a cylindrical outer shape and having a plurality of grooves arranged in parallel on the respective outer peripheral surfaces along the axial direction, and the pair of balls are rotated. A cable drawing machine equipped with a driving motor is arranged at predetermined intervals along a cable drawing path,
A cable guide section for guiding a cable is partitioned, and a plurality of straightening corner rollers arranged side by side are installed at the corners of the extended route with the direction of the cable guide sections substantially vertically oriented and the cable is arranged. A plurality of straightening rollers, each of which has a plurality of cable guide sections to be guided and partitioned, are installed between adjacent cable drawing machines such that the direction in which the cable guide sections are arranged is directed in a direction in which the wire path is interrupted. Arranging a plurality of cable drums on the starting end side of the wire extension path, and connecting a plurality of cables unreeled from each of the plurality of cable drums to a tow rope via a return. And driving the cable drawing machine while towing the tow rope, and an operator for guiding the cable returns the cable from the cable drawing machine to the wire drawing machine. When passing through the roller and the straightening roller, each of the plurality of cables is guided to each of the grooves of the pair of balls of the cable drawing machine, and is guided to each of the cable guides of the straightening corner roller. And guiding the cable to the respective cable guides of the straightening roller, so that each of the plurality of cables can be specified,
Wires can be drawn simultaneously without entanglement and with less slack, shortening the construction period and reducing costs, and simplifying the work of transferring the drawn cables to the cable tray and the work of straightening. The cable multi-drawing method is obtained.

Further, a winch is provided at the rear end side of the extension route of the cable, and the tow rope is wound around a drum of the winch, and the tow rope is towed by driving the winch. Therefore, a plurality of heavy cables can be reliably extended.

Further, since the tow rope is a loop-shaped tow rope, the tow rope is hung on a cable drawing machine, a straightening roller and a straightening corner roller while towing the tow rope along the extending route. The work becomes unnecessary in the second and subsequent cable extension work, and the workability of cable extension can be improved.

[0051]

[0052]

In addition, the cable in which the tow rope is adjacent
Is formed to a length approximately equal to the distance between
An operator for towing the rope extends the towing rope through the cable.
Wire drawing while pulling while biting between a pair of balls of wire drawing machine
Walking along the road and driving the cable drawing machine
In accordance with the walking speed along the extension route
The speed of moving the cable is adjusted so that the weight
Tow several cables is burdened by cable drawing machine
Winchless cable for easy cable guidance
Bull multi-line drawing

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a cable multi-strand drawing method according to Embodiment 1 of the present invention.

FIG. 2 is a schematic view showing a main part of a cable multi-drawing method according to Embodiment 1 of the present invention.

FIG. 3 is a perspective view showing a cable drawing machine used in the multiple cable drawing method according to Embodiment 1 of the present invention;

FIG. 4 is a perspective view showing a straightening roller used in the cable multi-strand drawing method according to Embodiment 1 of the present invention;

FIG. 5 is a perspective view showing a straightening corner roller used in the cable multi-drawing and extending method according to Embodiment 1 of the present invention;

FIG. 6 is a partially broken side view showing a twist used in the cable multi-drawing method according to the first embodiment of the present invention.

FIG. 7 is a schematic diagram illustrating a cable drawing state in a conventional ball drawing machine.

FIG. 8 is a schematic diagram illustrating a cable extending state in the cable extending machine according to the first embodiment of the present invention.

FIG. 9 is a schematic diagram showing a cable drawing machine used in a cable multi-drawing method according to Embodiment 2 of the present invention.

FIG. 10 is a schematic view showing a conventional cable drawing method.

FIG. 11 is a schematic view illustrating a conventional cable multi-drawing method.

[Explanation of symbols]

1 cable, 2 cable drums, 8 winches, 1
9 towel rope (tow rope), 20, 50 cable drawing machine, 21 straightening corner roller, 22 straightening roller,
23, 30 and 51 balls, 30a and 51a
Groove, 31 mount, 32 motor, 35, 36 rollers (cable guide), 40 rollers, 40a groove (cable guide).

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02G 1/06 H02G 1/02

Claims (4)

(57) [Claims] 1. Each is formed into a cylindrical outer shape,
In addition, a cable drawing machine having a pair of balls in which a plurality of grooves are provided in parallel on the respective outer peripheral surfaces along the axial direction and a motor for rotating and driving the pair of balls is provided along a cable drawing path. The cable guides for guiding the cables are arranged at predetermined intervals, and a plurality of line-aligned corner rollers, each of which is divided and arranged side by side, are arranged such that the direction in which the cable guides are arranged is substantially vertically oriented at the corners of the extension route. A cable drawing machine adjacent to a plurality of straightening rollers, each of which has a cable guide section for guiding a cable, which is sectioned, and which is arranged side by side in a direction in which the cable guide sections are arranged in a direction in which the wire drawing path is blocked. Installing at least one cable drum between the plurality of cable drums, and arranging a plurality of cable drums on the starting end side of the wire drawing path; A step of connecting to the tow rope via each return, and driving the cable drawing machine while towing the tow rope, an operator for cable guiding, the return from the above is the cable drawing machine Guiding each of the plurality of cables to each of the grooves of the pair of balls of the cable drawing machine when passing through the straightening corner rollers and the straightening rollers; A step of guiding the cable to the cable guide and guiding the cable to each cable guide of the straightening roller. 2. A winch is disposed at a rear end side of the wire drawing path of the cable, and the tow rope is wound around a drum of the winch, and driven by the winch, the tow rope is towed. 2. The method according to claim 1, wherein the cable is a multi-stretched cable. 3. The method of claim 2, wherein the pulling rope is a loop-shaped pulling rope. 4. The tow rope is formed to have a length substantially equal to the distance between adjacent cable drawing machines, and an operator for rope tow pulls the tow rope to a pair of balls of the cable drawing machine. Walking along the extension line while pulling while biting in between, and controlling the drive of the cable drawing machine to adjust the movement speed of the cable according to the walking movement speed along the extension line 2. The method according to claim 1, wherein the cable is extended.