JP2004147478A - Remaining cable removing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a remaining cable removing apparatus which prevents a remaining cable from slackening and is capable of pulling the remaining cable out of an underground conduit. <P>SOLUTION: The remaining cable removing apparatus 1A comprises a fixed block 3, movable block 4, and intermediate block 5 which are disposed in parallel with one another; two hydraulic cylinders 6 for pulling which are held by the fixed block 3 and the intermediate block 5, and has tips of their rods 6a coupled with the movable block 4; a clamping means 7 for pulling a remaining cable A installed on the movable block 4; and a clamping means 8 for holding the remaining cable A installed on the intermediate block 5. The clamping means 8 for holding is so constituted that, after the clamping means 7 for pulling clamps the remaining cable A in a predetermined retreat position, the clamping means 8 release the clamping of the remaining cable A so that the clamping means 7 for pulling can be caused to advance by the hydraulic cylinders 6 for pulling, and the remaining cable A can be thereby pulled, and after the clamping means 7 for pulling reaches a predetermined advance position, the clamping means 8 clamps the remaining cable A to hold tension exerted on the remaining cable A. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a residual cable removing device for removing a communication cable or the like left in an underground conduit, and particularly to a means for preventing the remaining cable from being loosened.
[0002]
[Prior art]
To remove communication cables left in the underground pipeline, winches provided on the cable laying / removing vehicle are usually used. However, since the winch has a small towing capacity of about 3 tons, rust or Remaining cables that have become difficult to pull out due to deformation or the like cannot be removed.
[0003]
For this reason, conventionally, as a device for removing a remaining cable that cannot be removed by a winch, a device that applies a traction force of about 20 tons to the remaining cable using a hydraulic cylinder has been proposed.
[0004]
A conventionally proposed residual cable removing device includes a slide body that can reciprocate along a cable laying direction in a frame, and a slide body disposed at a left-right position in the frame to reciprocate the slide body. A hydraulic cylinder, a clamp member disposed at a vertical position of the slide body and capable of clamping a cable, and a second fixed and disposed at a vertical position of the slide body to open and close these clamp members. It is configured to include a hydraulic cylinder (for example, see Patent Document 1).
[0005]
In the conventional cable removing device according to the related art, the remaining cable is clamped to the clamp with the slide body retracted in the cable installation direction, and then the slide body is advanced by the first hydraulic cylinder in the cable installation direction. By doing so, a large traction force can be applied to the remaining cable.
[0006]
[Patent Document 1]
JP-A-5-64330
[0007]
[Problems to be solved by the invention]
However, the device for removing a residual cable according to the conventional example does not consider the elastic extension of the residual cable generated when a traction force is applied. There is a disadvantage that the cable cannot be pulled out from the underground conduit.
[0008]
That is, as described above, the remaining cable removing device according to the conventional example repeats the clamp of the remaining cable to the slide body, the advance of the slide body, the release of the clamp of the remaining cable to the slide body, and the retreat of the slide body. The residual cable is pulled out from the underground conduit, but if the residual cable undergoes a large elastic extension when the slide body is advanced, the residual cable is elastically contracted at the stage where the clamp of the residual cable to the slide body is released, and the traction force is generated. The state returns to the state before the application, and the remaining cable cannot be pulled out from the underground conduit even if the above steps are repeated many times.
[0009]
SUMMARY OF THE INVENTION The present invention has been made to solve such a deficiency of the prior art, and an object of the present invention is to provide an elastic shrinkage of the remaining cable in the unclamping stage even when a large elastic elongation occurs in the remaining cable due to the application of the traction force. It is an object of the present invention to provide a residual cable removing device that can prevent loosening due to a cable and can surely pull out a residual cable from an underground pipeline.
[0010]
[Means for Solving the Problems]
The present invention, in order to solve the above problems, the remaining cable removing device, a fixed table and a movable table arranged in parallel with each other, is set between the fixed table and the movable table, the fixed table A retractable hydraulic cylinder for reciprocatingly driving the movable table, a retractable cable installed on the movable table or tow clamp means for an auxiliary fitting connected to a distal end of the residual cable, the fixed table and the movable table. And clamping means for holding the remaining cable or the auxiliary fitting disposed between the holding cable and the auxiliary fitting, wherein the towing clamp means clamps the remaining cable or the auxiliary fitting at a predetermined retreat position. Then, the clamp of the remaining cable or the auxiliary fitting is released to advance the towing clamp means by the towing hydraulic cylinder, and the remaining cable accompanying it. And the towing clamp means clamps the remaining cable or the auxiliary fitting after reaching the predetermined forward position to hold the tension acting on the remaining cable. .
[0011]
As described above, in the remaining cable removing device including the towing hydraulic cylinder and the towing clamp means, the towing clamp means clamps the remaining cable or the auxiliary fitting at a predetermined retreat position, and then clamps the remaining cable or the auxiliary fitting. It is released to allow the towing hydraulic cylinder to advance the towing clamp means and the accompanying towing of the remaining cable, and to clamp the remaining cable or auxiliary fitting after the towing clamp means reaches a predetermined forward position. With the holding clamp means for holding the tension acting on the remaining cable, even if the retraction cable causes a large elastic elongation due to advancing the towing clamp means, the elasticity of the remaining cable can be increased by the holding clamp means. Unclamping of remaining cables or auxiliary fittings can be prevented as shrinkage can be prevented The traction clamping means is retreated to a predetermined position, by advancing the traction clamping means to clamp again leaving cable or auxiliary bracket, it is possible to sequentially increase the pulling amount of leaving the cable Te. Therefore, loosening of the remaining cable can be prevented, and the remaining cable can be reliably pulled out from the underground conduit.
[0012]
Further, in the residual cable removing device having the above-described configuration, the tow clamp means is constituted by a tow clamp fitting provided on the moving table, and a tow clamp hydraulic cylinder for driving the towing clamp fitting to open and close, An intermediate base fixed between the fixed base and the movable base, a holding clamp provided on the intermediate base, and a holding clamp for opening and closing the holding clamp; It was configured to consist of a hydraulic cylinder.
[0013]
As described above, the tow clamp means is constituted by the tow clamp fitting provided on the movable table and the tow clamp hydraulic cylinder for driving the towing clamp fitting to open and close. And an intermediate table fixed between the movable table and the moving table, a holding clamp provided on the intermediate table, and a holding clamp hydraulic cylinder for driving the holding clamp to open and close. Since all the drive units of the device can be hydraulically driven, it is easy to automatically control the sequential drive of each unit of the device, and it is possible to facilitate the work of removing the remaining cable and improve the efficiency.
[0014]
Further, in the residual cable removing device having the above-described configuration, the tow clamp means has the auxiliary fitting made of a screw rod and a through-hole of the auxiliary fitting, and the towing pressure receiving plate disposed in front of the moving table. And a traction nut screwed to the auxiliary fitting and disposed in front of the traction pressure receiving plate, wherein the holding clamp means has a through hole of the auxiliary fitting, and the traction nut , And a holding nut screwed to the auxiliary fitting and arranged in front of the holding pressure plate.
[0015]
As described above, the tow clamp means is composed of an auxiliary fitting made of a screw rod, a tow pressure plate having a through-hole of the auxiliary fitting and arranged in front of the moving table, and the tow fitting screwed to the auxiliary fitting. A tow nut disposed in front of the pressure receiving plate, and the holding clamp means is provided with a through-hole for the auxiliary fitting, and is provided with a holding pressure receiving plate disposed in front of the tow nut; When the holding nut and the holding nut arranged in front of the holding pressure receiving plate are used, the towing clamp means and the holding clamp means can have a simple mechanical structure, so that the cost of the remaining cable removing device can be reduced. Can be achieved.
[0016]
Further, in the residual cable removing device having the above-described configuration, the fixed base, the intermediate base, and the movable base are mounted on a pedestal provided with a height adjusting unit.
[0017]
As described above, when the fixed base, the intermediate base, and the movable base of the residual cable removing device are mounted on the gantry provided with the height adjusting means, the height adjusting means is operated, so that the height of the underground pipe in the manhole is reduced. Since the installation height of the remaining cable removing device can be easily adjusted according to the above, the removal of the remaining cable can be facilitated and the efficiency can be improved.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a first embodiment of a residual cable removing device according to the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a main part of a residual cable removing device according to the first embodiment, FIG. 2 is a front view of a tow clamp means provided in the residual cable removing device according to the first embodiment, and FIG. It is a front view of the clamp means for holding provided with the residual cable removal apparatus which concerns on embodiment.
[0019]
As shown in FIG. 1, the residual cable removing device 1 </ b> A of the present example is held by a fixed base 3, a moving base 4 and an intermediate base 5 arranged in parallel with each other, and the fixed base 3 and the intermediate base 5, Two towing hydraulic cylinders 6 whose rods 6a have distal ends connected to the moving table 4, towing clamp means 7 for the remaining cable A installed on the moving table 4, and installed on the intermediate table 5. And a clamp means 8 for holding the remaining cable A.
[0020]
The fixed base 3, the movable base 4, and the intermediate base 5 are made of an aluminum alloy to reduce the weight, and a through hole for inserting the remaining cable A is provided at the center of each of the bases 3, 4, and 5. 3a, 4a and 5a are established.
[0021]
The tow hydraulic cylinder 6 is provided with two hydraulic cylinders 6 capable of giving a traction force equal to or higher than the tensile strength (maximum breaking strength) of the remaining cable A to the remaining cable A. For example, the residual cable removing device applied to removing the residual cable A having a tensile strength of 20 tons is provided with a towing hydraulic cylinder capable of applying a traction force of 10 tons or more to the residual cable A by one.
[0022]
As shown in FIGS. 1 and 2, the towing clamp means 7 includes guide members 11 and 12 having a substantially U-shaped front shape disposed on both left and right sides through a through hole 4 a, and each of these guides. The towing clamps 13 and 14 are guided by the members 11 and 12 to move on the movable table in the left-right direction, and the towing clamp hydraulic cylinders 15 and 16 drive the towing clamps 13 and 14 to open and close. It is configured. The towed clamps 13 and 14 are formed with arc-shaped clamps 13a and 14a at the center thereof, and the inner surfaces of the clamps 13a and 14a are for securely holding the remaining cable A. Occlusal teeth 13b and 14b are formed. The guide members 11 and 12 and the towing clamp fittings 13 and 14 have a circular center formed when the two clamp portions 13 a and 14 a are combined, and a center of a through hole 4 a formed in the movable base 4. Is provided on the moving table 4 so as to match the above. The towing clamp means 7 can be attached to and detached from the moving table 4 in order to reduce the weight of the remaining cable removing device during transportation and handling, and to improve the ease of transportation and handling. It is preferable to configure. Further, the tow clamp fittings 13 and 14 are provided with respect to the guide members 11 and 12 so that various tow clamp fittings having different curvatures of the clamp portions 13 a and 14 a according to the diameter of the remaining cable A can be applied. It is preferable to be configured to be detachable.
[0023]
As shown in FIGS. 1 and 3, the holding clamp means 8 is arranged on both upper and lower sides through a through hole 5 a, and has one end rotatably supported by the intermediate table 5 by a pin 21. And the holding clamps 22 and 23, and holding and holding hydraulic cylinders 24 and 25 for driving the holding clamps 22 and 23 to open and close. The holding clamps 22 and 23 are formed with arc-shaped clamps 22a and 23a at the center thereof, and the inner surfaces of the clamps 22a and 23a are used to securely hold the remaining cable A. Occlusal teeth 22b and 23b are formed. The holding clamps 22 and 23 are arranged such that the center of a circle formed when the two clamps 22 a and 23 a are combined is aligned with the center of a through hole 5 a formed in the intermediate base 5. The intermediate table 5 is provided. The holding clamps 22 and 23 are attached to and detached from the intermediate table 5 so that various holding clamps having different curvatures of the clamp portions 22a and 23a according to the diameter of the remaining cable A can be applied. It is preferable to configure it as possible.
[0024]
Hereinafter, a method of removing the remaining cable using the cable removing device 1A according to the first embodiment will be described with reference to FIGS. FIG. 4 is a configuration diagram of a use state of the remaining cable removing device according to the first embodiment, and FIG. 5 is an operation explanatory diagram of the remaining cable removing device according to the first embodiment.
[0025]
As shown in FIG. 4, when removing the remaining cable A, the cable removing device 1A according to the first embodiment is mounted on a gantry 31 provided with height adjusting means. As the height adjusting means, a hydraulic type or a mechanical type can be used. Also, a hydraulic pump 32 for supplying hydraulic oil to the hydraulic cylinders 6, 15, 16, 24, 25, and a control for controlling the flow of hydraulic oil supplied to the hydraulic cylinders 6, 15, 16, 24, 25 The power is supplied to the remote controller 34 for remotely controlling the flow of the hydraulic oil supplied to the hydraulic cylinders 6, 15, 16, 24, 25 via the panel 33 and the control panel 33, the hydraulic pump 32 and the control panel 33. Generator 35, a control panel 33 and hydraulic hoses 36 connecting the hydraulic cylinders 6, 15, 16, 24, 25 provided in the cable removing device 1A, and a harness for fixing the cable removing device 1A at a required position. 37 and a cable reel 38 for collecting the pulled-out remaining cable A are prepared.
[0026]
At the time of removing the remaining cable A, as shown in FIG. 4, first, the auxiliary steel material C for receiving the reaction force during the towing operation is carried into the manhole B, and the pipe in which the remaining cable A to be removed is laid. Installed around road D. At this time, the towing hydraulic cylinder 6 is contracted, and the moving table 4 is retracted to a position closest to the intermediate table 5. Further, the towing clamp fittings 13 and 14 and the holding clamp fittings 22 and 23 are both in an open state. Next, the gantry 31 and the cable removing device 1A are carried into the manhole B, and the cable removing device 1A is installed on the gantry 31. Next, the height adjusting means of the gantry 31 is operated to remove the height positions of the through holes 3a, 4a, 5a formed in the fixed table 3, the moving table 4 and the intermediate table 5 of the cable removing device 1A. It is matched with the height position of the pipeline D where the remaining cable A is laid. Next, the distal end of the remaining cable A protruding from the pipe D is inserted into each of the through holes 3a, 4a, 5a, and the surface of the fixing base 3 is uniformly brought into contact with the surface of the auxiliary steel material C. Next, a harness 37 is stretched between a hook (not shown) provided on the cable removing device 1A and a hook (not shown) provided on the wall surface of the manhole B, and the cable removing device 1A is fixed. The hydraulic hose 36 is connected to each of the hydraulic cylinders 6, 15, 16, 24, and 25 provided in the cable removing device 1A, and the preparation is completed.
[0027]
Thereafter, the remote controller 34 is operated to supply the hydraulic oil from the hydraulic pump 32 to the hydraulic cylinders 15 and 16 for the traction clamps via the control panel 33 and the hydraulic hose 36, and to clamp the traction clamps 13 and 14. The remaining cable A is clamped by the parts 13a and 14a. Next, the hydraulic oil from the hydraulic pump 32 is supplied to the towing hydraulic cylinder 6 via the control panel 33 and the hydraulic hose 36, and the towing hydraulic cylinder 6 is extended as shown in FIG. Move 4 forward. As a result, the traction force of the traction hydraulic cylinder 6 acts on the remaining cable A, and elongation occurs according to the state of rust or deformation in the pipeline D.
[0028]
When the moving table 4 reaches a predetermined forward position (stroke end of the towing hydraulic cylinder 6), the pressure oil from the hydraulic pump 32 is supplied to the holding and clamping hydraulic cylinders 24 and 25 via the control panel 33 and the hydraulic hose 36. The remaining cable A is supplied and clamped by the clamp portions 22a and 23a of the holding clamps 22 and 23. Thereby, the elastic return of the remaining cable A is prevented.
[0029]
After the remaining cable A is clamped by the holding clamps 22 and 23, the pressure oil supplied to the traction clamp hydraulic cylinders 15 and 16 is returned to a tank (not shown), and the traction clamps 13 and 14 are opened. Next, the pressure oil supplied to the towing hydraulic cylinder 6 is returned to a tank (not shown), and the towing hydraulic cylinder 6 is contracted to return the movable platform 4 to the original position.
[0030]
After returning the movable table 4 to the original position, the hydraulic oil from the hydraulic pump 32 is supplied to the hydraulic cylinders 15 and 16 for the traction clamps, and the remaining cables are clamped by the clamp portions 13a and 14a of the traction clamps 13 and 14. Clamp A again. Finally, the pressure oil supplied to the holding clamp hydraulic cylinders 24, 25 is returned to a tank (not shown), and the holding clamp fittings 22, 23 are opened. Hereinafter, the above procedure is repeated until the traction force required to pull out the remaining cable A becomes a value that can be pulled by a low-capacity traction device such as a winch. The pulled out remaining cable A is wound around a cable reel 38 and collected.
[0031]
These operations in each stage can be automatically performed by a sequencer provided in the control panel 33 or can be manually performed by using a remote controller 34.
[0032]
When the remaining cable A cannot be directly clamped by the towing clamp fittings 13 and 14 because the amount of protrusion of the remaining cable A from the conduit D is small, as shown in FIG. The auxiliary fitting 41 is connected, and the auxiliary fitting 41 is pulled by the cable removing device 1A. The auxiliary fitting 41 is formed with a projection 41a and a recess 41b at equal intervals so that the towing clamp fittings 13 and 14 and the holding clamp fittings 22 and 23 can be securely clamped to the auxiliary fitting 41. Also, the towing clamp fittings 13 and 14 and the holding clamp fittings 22 and 23 can be engaged with the projections 41a and the recesses 41b formed on the auxiliary fitting 41 at the clamps 13a and 14a and the clamps 22a and 23a. What has a convex part and a concave part is used. As shown in FIG. 7, the connection of the auxiliary fitting 41 to the remaining cable A is performed by covering the end of the remaining cable A with the gripping cup 42, injecting the resin 43 into the gripping cup 42, and then driving the resin into the resin. After the pin 44 is driven in and the resin is solidified, the end of the auxiliary fitting 41 is screwed to the driving portion of the driving pin 44. The procedure for towing the remaining cable A is the same as the procedure for directly towing the remaining cable A, and a description thereof will be omitted.
[0033]
The residual cable removing device 1A of the present embodiment is a residual cable removing device provided with a towing hydraulic cylinder 6 and a towing clamp means 7. After the clamping, the clamp of the remaining cable A or the auxiliary fitting 41 is released to allow the towing hydraulic cylinder 6 to advance the towing clamp means 7 and the accompanying towing of the remaining cable A. Since the holding cable means 8 for holding the tension acting on the remaining cable A by clamping the remaining cable A or the auxiliary fitting 41 after reaching the predetermined forward position is provided, the towing clamp means 7 is advanced. When the remaining cable A undergoes a large elastic elongation due to the above, even if the remaining cable A is elastically contracted by the holding clamp means 8. It can be prevented, the clamp of the remaining cable A or the auxiliary fitting 41 is released, the retraction clamp means 8 is retracted to a predetermined position, the remaining cable A or the auxiliary fitting 41 is clamped again, and the retraction clamp means 7 is advanced. By doing so, the amount of pulling of the remaining cable A can be sequentially increased. Therefore, a large traction force can be continuously applied to the remaining cable A, the loosening of the remaining cable A can be prevented, and the remaining cable A can be reliably pulled out from the underground conduit.
[0034]
Further, the residual cable removing device 1A of the present embodiment uses the towing clamp means 7 for the towing clamp fittings 13 and 14 provided on the movable base 4 and the towing clamp for opening and closing the towing clamp fittings 13 and 14. In addition to the hydraulic cylinders 15 and 16, the holding clamp means 8 includes an intermediate table 5 fixed between the fixed table 3 and the moving table 4, and a holding clamp 22 provided on the intermediate table 5. , 23 and the holding clamp hydraulic cylinders 24, 25 for opening and closing the holding clamp fittings 22, 23, all of the drive units of the residual cable removing device 1A can be hydraulically driven. The sequential driving can be automatically controlled, and the removal work of the remaining cable A can be facilitated and the efficiency can be improved.
[0035]
Further, since the residual cable removing device 1A of this example is mounted on the gantry 31 provided with the height adjusting means, by operating the height adjusting means, the height of the underground pipe D in the manhole B is adjusted. The installation height of the remaining cable removing device 1A can be easily adjusted, and the removal of the remaining cable A can be facilitated and the efficiency can be improved.
[0036]
Next, a second embodiment of the remaining cable removing device according to the present invention will be described with reference to FIG. FIG. 8 is an explanatory diagram of the configuration and operation of the remaining cable removing device according to the second embodiment.
[0037]
As shown in FIG. 8, the remaining cable removing device 1 </ b> B of the present example has the towing clamp means 7 including an auxiliary fitting 41 made of a screw rod and a through hole of the auxiliary fitting 41, and is provided in front of the moving table 4 ( The traction pressure receiving plate 51 is disposed in the direction in which the remaining cable A is pulled out), and the traction nut 52 is screwed to the auxiliary fitting 41 and is disposed in front of the traction pressure receiving plate 51. The holding clamp means 8 has a through hole for the auxiliary fitting 41, and is provided with a holding pressure receiving plate 53 disposed in front of the towing nut 52, and is screwed to the auxiliary fitting 41. It is characterized by comprising a holding nut 54 arranged in front of 53 and a connecting member 55 for connecting the intermediate table 5 and the holding pressure receiving plate 53. Other components are the same as those of the remaining cable removing device 1A according to the first embodiment, and the corresponding portions are denoted by the same reference numerals and description thereof will be omitted.
[0038]
Hereinafter, a method for removing the remaining cable using the cable removing device 1B according to the second embodiment will be described with reference to FIGS. 8 (a) to 8 (d).
[0039]
The preparation stage until the hydraulic hose 36 is connected to the towing hydraulic cylinder 6 is performed in the same manner as the method of removing the remaining cable A using the cable removing device 1A according to the first embodiment.
[0040]
After the preparation is completed, the towing pressure receiving plate 51 is brought into contact with the front surface of the movable base 4 (the surface on the side from which the remaining cable A is pulled out), and the towing nut 52 is fastened to the front surface of the towing pressure receiving plate 51. On the other hand, the holding nut 54 may be arranged at an appropriate position in front of the holding pressure receiving plate 53 in a state of being screwed to the auxiliary fitting 41.
[0041]
Thereafter, the remote controller 34 is operated to supply the hydraulic oil from the hydraulic pump 32 to the towing hydraulic cylinder 6 via the control panel 33 and the hydraulic hose 36, and as shown in FIG. The cylinder 6 is extended, and the carriage 4 is advanced. As a result, the traction force of the traction hydraulic cylinder 6 is transmitted to the remaining cable A via the moving table 4, the traction pressure receiving plate 51, and the traction nut 52, and the remaining cable A is in a state of rust or deformation in the pipeline D. Elongation occurs according to At this time, the holding nut 54 advances in the direction in which the remaining cable A is pulled out by the amount of extension of the remaining cable A.
[0042]
When the movable table 4 reaches the predetermined forward position (the stroke end of the towing hydraulic cylinder 6), the holding nut 54 is fastened to the holding pressure receiving plate 53 as shown in FIG. Thereby, the elastic return of the remaining cable A is prevented.
[0043]
After the holding nut 54 is fastened to the holding pressure receiving plate 53, the pressure oil supplied to the towing hydraulic cylinder 6 is returned to a tank (not shown), and as shown in FIG. The mobile table 4 is contracted to return to the original position. Then, the towing pressure receiving plate 51 is brought into contact with the front surface of the movable table 4 that has been returned to the original position again, and the towing nut 52 is fastened to the front surface of the towing pressure receiving plate 51. Hereinafter, the above-described procedure is repeated until the traction force required to pull out the remaining cable A becomes a value that can be pulled by a low-capacity traction device such as a winch. The pulled out remaining cable A is wound around a cable reel 38 and collected.
[0044]
In the cable removing device 1B according to the second embodiment, the towing clamp means 7 has an auxiliary fitting 41 made of a screw rod and a through hole of the auxiliary fitting 41, and is provided in front of the movable table 4 (the remaining cable A). The pulling pressure receiving plate 51 disposed in the drawing direction) and a traction nut 52 screwed to the auxiliary fitting 41 and disposed in front of the traction receiving pressure plate 51 and the holding clamp. The means 8 has a through hole for the auxiliary fitting 41 and is provided with a holding pressure receiving plate 53 disposed in front of the towing nut 52, and is screwed to the auxiliary fitting 41 so as to be in front of the holding pressure receiving plate 53. , And the connecting member 55 for connecting the intermediate base 5 and the holding pressure receiving plate 53 to each other, so that the towing clamp means 7 and the holding clamp means 8 have a simple mechanical configuration. Can do , It is possible to reduce the cost of leaving the cable removal device.
[0045]
【The invention's effect】
As described above, the cable removing device of the present invention is a residual cable removing device provided with a tow hydraulic cylinder and tow clamp means, wherein the tow clamp means clamps the remaining cable or the auxiliary fitting at a predetermined retreat position. After that, the clamp of the remaining cable or the auxiliary fitting is released to enable the towing hydraulic cylinder to advance the towing clamp means and the accompanying towing of the remaining cable, and the towing clamp means reaches a predetermined forward position. Since the holding cable means for holding the tension acting on the remaining cable by clamping the remaining cable or auxiliary metal fittings later is provided, when the retraction cable means is advanced by a large elastic elongation caused by advancing the traction clamp means. The elastic clamp of the remaining cable can be prevented by the holding clamp means. To be able to continuously impart a greater traction in Le A, can be drawn leaving the cable securely from the underground pipe.
[Brief description of the drawings]
FIG. 1 is a perspective view of a main part of a residual cable removing device according to a first embodiment.
FIG. 2 is a front view of a towing clamp means provided in the residual cable removing device according to the first embodiment.
FIG. 3 is a front view of holding clamp means provided in the remaining cable removing device according to the first embodiment.
FIG. 4 is a configuration diagram of a use state of the remaining cable removing device according to the first embodiment.
FIG. 5 is an operation explanatory view of the remaining cable removing device according to the first embodiment;
FIG. 6 is another operation explanatory view of the remaining cable removing device according to the first embodiment;
FIG. 7 is an explanatory diagram showing a method of connecting the remaining cable and the auxiliary fitting.
FIG. 8 is an explanatory diagram of a configuration and an operation of a remaining cable removing device according to a second embodiment.
[Explanation of symbols]
1A, 1B Remaining cable removal device
3 fixed base
4 mobile platform
5 Intermediate stand
6 Tow hydraulic cylinder
7 Tow clamping means
8 Clamping means for holding
11,12 Guide member
13,14 Towing clamp bracket
15,16 Hydraulic cylinder for traction clamp
22,23 Clamp fitting for holding
24, 25 Hydraulic cylinder for holding clamp
41 Auxiliary bracket
51 Tow pressure plate
52 Towing nut
53 Pressure plate for holding
54 Holding nut
55 connecting members
A Remaining cable
B Manhole
C auxiliary steel
D pipe

Claims (4)

A fixed base and a movable base arranged in parallel with each other, and a towing hydraulic cylinder that is set between the fixed base and the movable base and drives the movable base reciprocally with respect to the fixed base; and Clamping means for towing the installed residual cable or an auxiliary fitting connected to the tip of the remaining cable, and a clamp for holding the residual cable or the auxiliary fitting arranged between the fixed base and the movable base. And the holding clamp means, after the towing clamp means clamps the remaining cable or the auxiliary fitting at a predetermined retreat position, releases the clamp of the remaining cable or the auxiliary fitting and performs the towing. A hydraulic cylinder enables the traction clamp means to advance and the remaining cable to be pulled therewith. Leaving cable removal device, characterized in that to clamp the leaving cable or the reinforcing brackets after reaching the position to retain the tension acting on the leaving cable. The towing clamp means includes a towing clamp fitting provided on the movable table, and a tow clamping hydraulic cylinder for driving the towing clamp fitting to open and close, and the holding clamp means includes An intermediate table fixed between the movable table, a holding clamp provided on the intermediate table, and a holding clamp hydraulic cylinder for driving the holding clamp to open and close. Item 2. The remaining cable removing device according to Item 1. The tow clamp means, the auxiliary fitting made of a screw rod, a through-hole for the auxiliary fitting, a tow pressure plate disposed in front of the moving table, and screwed to the auxiliary fitting, A towing nut arranged in front of the towing pressure plate, wherein the holding clamping means has a through hole for the auxiliary fitting, and a holding pressure plate arranged in front of the towing nut. The remaining cable removing device according to claim 1, comprising a holding nut screwed to the auxiliary fitting and disposed in front of the holding pressure receiving plate. The residual cable removing device according to claim 1, wherein the fixed table, the intermediate table, and the movable table are mounted on a table provided with a height adjusting unit.

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