JPH0622367B2 - Cable installation method in cave - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a method of laying cables in a cave, and in particular to the upper part of a cable rack without the use of large equipment such as a work trolley. A method for enabling a cable to be laid in a trough arranged in.

(Prior Art) Inside a cavern where a high-voltage transmission line is laid, cable racks are placed on both sides of a working passage, and each cable rack is provided with a plurality of trough support members in the vertical direction. Thus, three high-voltage power transmission cables are housed in the troughs provided on each trough support member.
In the case of the 275KV OF cable, the cable has a weight per meter of about 35 kg and a diameter of 13 to 4 cm.
There is a degree.

When installing a cable on a trough support member provided at a low position in a cave as described above, for example, Japanese Patent Publication No.
It is possible to use a work carriage as disclosed in Japanese Patent Publication No. 38885. The trolley is configured such that the cable extended to the floor in the center of the cave is guided upward by the roller means provided on the work trolley, and the lifted cable is sequentially fed into the trough support member from the end. The cable laying work can be done continuously.

However, in the work cart for the above-described work, when the trough support member on the upper part of the cable rack is provided at a position higher than 2 m, the work floor of the cart is set to a high position, and For reasons such as poor stability,
There is a problem that workability is very poor.

Therefore, when a cable is laid on the upper trough, a work carriage having improved stability may be used as shown in Japanese Utility Model Publication 60-15840. The work trolley shown in this conventional example is provided with a means to be guided by a guide rail on the upper part of the trolley, and the traveling wheels are configured to move along a groove provided on the floor of the tunnel.

Further, the work table of the truck is provided with a guide means for guiding the cable to the side part so that the work can be easily performed when the cable is moved toward the trough.

(Problems to be Solved by the Invention) However, in the conventional cavernous cable laying method as described above, a device such as a truck needs to be relatively large. In addition, in the present situation where the cable has a large capacity, the weight per unit length of the cable is relatively heavy, and the work for moving the cable from the trolley toward the trough is a small number of works. There is a problem that it is difficult for a member to do.

On the other hand, it is a problem in terms of safety that many workers ride on work trolleys or troughs and manually move cables to perform laying work. It also does not improve efficiency.

Furthermore, when the work cart as described above is not used,
It is necessary to install a scaffold at a height corresponding to the upper trough, to extend a cable on the scaffold, and then to use a means for moving the cable onto the trough, for example, one drum When the wound cable has a length of 6 to 700 m, it is very laborious for the operator to lift and move all the cables.

(Object of the Invention) The present invention solves the above-mentioned drawbacks of the conventional cable laying method, and uses a relatively simple facility to extend the cable in the cave and to the trough. It is an object of the present invention to provide a cable laying method in a cave that can be moved easily and easily to perform the work of laying more efficiently.

(Means and Actions for Solving Problems) The method for laying a cable in a cave according to the present invention is configured by arranging a cable rack provided with a large number of shelves in the vertical direction and arranging columns corresponding to the cable rack. Regarding working methods in a closed cave.

In the present invention, a mounting bracket is provided to the pillar in the cave according to the height of the shelf, a roller for guiding the cable through the mounting bracket, and a cable for extending the cable. The feeding device is arranged, and a slide rod arranged between the trough of the shelf is attached.

Then, after the cable is extended by the roller device, slide bars are arranged at regular intervals, and the roller device in the section in which the slide bars are arranged is rocked to release the support for the cable. By moving the cable supported on the trough toward the trough according to the inclination of the slide rod, the cable can be accommodated in the trough.

Therefore, in the method for laying a cable in a cave according to the present invention, it is possible to continuously perform the operation of laying the cable without using a trolley, etc., and also to secure a sufficient passage for work to ensure safe work. You can do it.

The device used in the present invention is only a mounting bracket attached to each strut, a roller device provided in the bracket, and a slide rod for laterally moving the cable. , The configuration can be simple.

In addition, when performing the work of laying the cable, moving the cable in the length direction by the roller device,
By sliding on the slide rod by its own weight, the operation of moving the cable in the lateral direction can be performed, so that the work of moving the cable on the trough can be easily performed.

(Example) The method of laying a cable in a cave according to the present invention will be described with reference to the illustrated example.

As shown in FIG. 1, when laying the cable 20 in the cave, for example, a section corresponding to the length of one turn of the cable (for example, 275 k
In the 650m long section of the OF cable for v), each post 2
Fix the mounting bracket 30 at a predetermined height against
The roller device 40 is attached to the block 35 provided on each mounting bracket. Further, the cable feeding device 2 is provided at predetermined intervals with respect to the roller device.
5 is arranged so that the wire can be extended without applying excessive tension to the cable 20.

An operation of winding a wire or the like connected to the end of the cable by the winding device, by arranging a cable feeding device and a winding device in the manhole portion arranged in each fixed section of the cave I do.

Simultaneously with the above operation, the cables are fed by the respective cable feeding devices 25 arranged in each predetermined section in the cave, and the cables are moved along the respective roller devices 40 to perform the work of extending the cable in the cave.

In the state where all the cables are extended to the sinus, the cable 20 is supported on the rollers. Also,
Each roller device 40 has a wire 4 at the end of its support arm.
It is possible to prevent the generation of noise due to the support arm swinging when the cable moves on the roller 41 and the fine vibration applied to the roller device.

In the embodiment shown in FIG. 1, the section A shows a state in which the cable is extended, and the section B shows a state in which the support state by the roller is released and the slide rod 50 supports the cable. Section C shows a state in which the cable is housed in the trough.

That is, in the cable laying method of the present invention, the cable 20 is connected to the roller device 4 as shown in the section A.
In the state of being guided by the roller 41 of 0, it is moved in the length direction by the cable feeding device 25 and the cable is extended to the entire predetermined laying section. The cable feeding device 25 is supported by the supporting column 2 by a mounting bracket, but when the cable is extended, a pulling force is applied in the length direction of the cable, so that the cable feeding device 25 is opposed to this tension. Further, connecting members 27, 27 such as wires are connected to the columns on both sides so that the force does not act on only one column.

As described above, the cable 20 is installed along the roller device.
When the cable is transferred to the trough 15 after being extended, the mounting bracket 30 and the trough support member 12 are connected to each other by dividing into a certain section (for example, a length of about 35 m). In such a state, the slide bar 50 is attached to each of the columns 2 as indicated by reference numeral a1. Then, at the portion where the slide bar is provided, the roller device is swung as shown in the section B. Work to do so is performed. The structure for swinging this roller device is
As will be described with reference to FIG. 2, this is performed by pulling out a pin supporting the support arm from the mounting block 35 of the device.

That is, when the support pin is pulled out while the end portion of the support arm 42 is supported by the block 35, the roller device 40 swings downward about the support pin, and as shown by reference numeral b1, the cable The support state for 20 is released.

The cable 20 is supported only on the slide rod 50, and the inclination of the slide rod causes
The cable is slid by its own weight so that it can be moved toward the trough 15.

As described above, the swing operation of the roller device is performed in the section B.
, The cable is housed in the trough 15 as shown in section C. That is, the cable 20 slides on the slide rod 50 in the trough direction in order from the position close to the section C in the section B, and is accommodated in the trough 15 as indicated by a portion c1. Like

As described above, when the cable is slid along the slide rod 50, the worker performs only the auxiliary work for positioning the cable at a predetermined position in the trough, so that the trough 15 The cable can be fixed at any position inside.

Then, in the portion of the predetermined section B, the cable is slid along the slide rod toward the trough 15, and when the transfer work is completed, the slide rod 50 is removed from the section B and the next section A Then, in the section A, the work of mounting the slide bar at the position corresponding to each roller device is performed.

As described above, in the state of dividing into predetermined sections,
The cable is moved from the roller device through the slide rod to be accommodated in the trough repeatedly, and the cable is laid in the cave over a predetermined length of the cable.

Further, in the embodiment of the present invention, by performing the work of mounting the slide rod in a state of being divided into relatively short sections, the problem of the number of workers, the problem of the number of slide rods installed at the same time, etc. Be able to correspond.
In addition, in the present invention, when the separation length of the work section is set in correspondence with the interval of the cable sending device 25,
Each work can be done in good condition.

Then, by performing the work of moving the cable toward the trough in correspondence with the section of the short cable feeding device, it is possible to reduce the number of workers who simultaneously enter the cave, and at the same time, a member such as a slide rod. You won't need to use much.

Further, by carrying out the work of moving the cable only in a relatively short section, it becomes possible to easily carry out the work of handling an OF cable or the like having a large weight per unit length. I can.

In addition, when moving the cable along the slide bar,
When the pinching state of the cable feeding device 25 with respect to the cable of the caterpillar device is released, the cable is easily separated from the cable feeding device and moved toward the trough.

When the three cables are to be accommodated in the trough, the work of laying the cables is repeated three times over the entire section where the cables are laid, and every time the cable is laid, the cable is slid in short sections. It is assumed that the rod mounting and removing operations are repeated.

Further, as described above, when the work of applying the cable in the cave is completed in the section corresponding to one cable,
Remove all brackets and roller devices attached to the columns. Then, the roller device is attached to the column via the bracket in correspondence with the next section, the cable is extended, and the work is accommodated in the trough.

In order to perform the above operation, the cable laying device of the present invention is
A roller device 40 configured as described in detail in FIG. 2 and a slide rod 50 are used. In the embodiment of the present invention shown in FIG. 2, the mounting bracket 30 is attached to the support column 2 arranged in the central portion in the width direction of the sinusway in correspondence with the height of the trough 15 for applying the cable. I have to.

The mounting bracket 30 is mounted in the vertical direction of the column 2 by inserting screws into the screw holes 3 formed at predetermined intervals through the upper and lower pin holes 31 and 31a. By changing the mounting position with respect to the screw holes 3, 3, ..., The mounting bracket can be mounted on the column 2 at an arbitrary height position.

As shown in the figure, a roller support block 35 and a bracket 33 are provided for a mounting bracket 30 that is mounted on the column 2 of the present invention. The roller support block 35 is provided with a groove having an opening formed in the lower portion, and a support arm 42 for supporting the roller 41 is attached to the groove. To attach the support arm 42 to the groove, Two pin holes 36 and 38 are provided.

Of the two pin holes, the pin 37 inserted into one of the fixing pin holes 36 is provided so as to penetrate the end portion of the support arm 42, and the other arm supporting pin hole 38 is provided in the pin hole 38. A pin 39 that supports the lower surface of the support arm 42 is mounted.

In the example shown in FIG. 1, the roller device 4
A steady wire 45 is attached to the tip of an arm 42 that supports the roller 41 of No. 0 via a wire fixing portion 46. The wire 45 prevents the cable having corrugation on its surface from swaying in the vertical and horizontal directions when the cable having corrugation on its surface is moved with respect to the roller device 40 supported by the arm in a cantilever manner. It is provided to do so.

That is, by connecting each roller 41 arranged along the support column with one wire,
Even if the cable moves on the roller row and a shock is applied to each roller 41 in the vertical and horizontal directions, the shock of the same phase is not applied to all the adjacent rollers. By canceling each other and reducing the vibration of the roller and the vibration of the roller,
It is possible to prevent the generation of noise.

Further, the bracket 33 is provided so as to extend laterally from the mounting bracket 30, and when the roller device 40 is set to a device that conveys a cable, the slide rod 50 is placed at a position that does not interfere with the roller. Can be installed. In addition, the slide bar 50 includes the bracket 33.
One end portion is inserted into the hole 34 provided in the trough support member 12 and the other end portion is supported by the end portion of the trough support member 12 through the end portion support bracket 53 and the L-shaped bent arm 55.

As described above, the arm 55 is attached to the end of the trough support member 12.
In the embodiment of the present invention, a trough support member made of a channel material is combined with a substantially U-shaped arm attachment member 56, and a fixing screw 57 is attached.
I use a means such as tightening.

Then, as described above, one end of the slide rod 50 is inserted into the hole 34 of the bracket 33, and the vicinity of the other end is supported by the trough support member 12 via the arm 55, so that the pillar 2 is supported. The slide rod 50 is supported between the trough support member and the trough support member so that the load can be supported when the cable 20 is placed.

In addition, the slide rod 50 of the present invention is configured such that
It is inclined so that it descends toward 5, and its inclination angle is set so that the cable can slide under its own weight. Further, as shown in the drawing, the end portion of the slide rod 50 on the trough 15 side is arranged so as to have a large inclination angle and to project to the upper portion of the trough. The protruding length of the slide rod on the trough can be adjusted according to the arrangement position of the cable and the like.
It is possible to arbitrarily adjust the length by inserting the end portion into the hole of the bracket 33 on the column side.

The two members of the slide rod and the roller configured as described above can be attached to the column 2 in the sinus 1 as shown in FIG. Then, for example, the side posts 11 are provided on the cable rack 10 arranged on the side of the cave 1.
When trough support members 12, 12 ... Are attached to a plurality of stages via the and troughs 15 are provided for the respective trough support members, when laying a cable on the uppermost trough, It can be used particularly effectively.

In the embodiment shown in FIG. 3, the trough 15 is configured as a closed type disaster prevention trough, and the upper member 1 is connected to the lower member 16 having a substantially U-shape via the connecting portions 17 and 17.
8 is attached, and the inside of the cable is sealed by the upper and lower members 16 and 18 to form a cable housing portion.

The upper and lower members constituting the trough 15 as described above are F
It is composed of RP or an iron plate or the like, and prevents heat generated from the cable from leaking to the outside and prevents a failure generated outside from affecting other cables. Further, a cooling water pipe 23 is arranged above the trough 15 in order to remove heat generated from the cable when the cable is housed in the closed trough. Then, by passing low-temperature water through the inside of the pipe 23, the inside of the trough is cooled and the heat of the cable can be prevented from rising.

In the embodiment of the present invention, when a large number of troughs are arranged in a cave, each trough 15 accommodates three cables, and each trough forms a circuit of a high voltage transmission line.

Further, in the cavern of the present invention, a cable feeding device 25 as shown in FIG. 4 can be used to move the cable 20 along the roller arranged at a high position.

The cable feeding device 25 can use a caterpillar type device that is usually used for moving a cable, and the cable feeding device 25 is mounted at the same height as the position of the roller via the mounting bracket 30a.
It is possible to move the cable in its length direction by mounting it on the cable 20 and extending the cable with the caterpillar means sandwiching the cable 20 from above and below.

The cable feeding device 25 has an interval of about 35 m, as in the case of general cable laying work.
It is placed inside the cavern and is designed to allow cable extension. In addition, the cable feeding device 2
5 is, as shown in FIG. 1, for the columns on both sides,
Connections are made by using the connecting members 27, 27, and it is possible to prevent a large force from being applied only to a column that supports the cable sending device.
It becomes possible to perform the action of extending the cable in a stable state.

Further, when the cable of the present invention is laid, the work for attaching the roller device and the slide rod to the bracket 30 provided on the column is performed by using a work carriage as shown in FIG. This work trolley 5 is, for example, the actual public sho 60-158
For example, a guide wheel can be used in the side groove 4a provided in the floor 4 in order to regulate the traveling direction of the truck in the cave, although the one shown in Japanese Patent Publication No. 40, etc. can be used. Let me guide you through 9.

Further, the guide wheel 9 is provided on a support arm 9a protruding to the side portion of the bogie body so that the traveling wheel 8 does not fall into the groove 4a. A workbench 6 is provided on the dolly 5, and an operator rides on the workbench 6 to mount a mounting bracket, a roller and a slide rod, and transfer a cable as described later. You will be able to perform each work.

In the work carriage 5 of the present invention, the upper guide member 7 is provided on the side portion of the support pillar side, and the guide member 7 is slid on the support pillar so that the carriage 5 can be moved. It is possible to allow the carriage to move along the working path in the cave by cooperating with the guide by the gutter 4a.

In the embodiment of the present invention, the case where the OF cable is laid in the cave has been described, but the device of the present invention is
It can also be applied to other types of high-voltage power transmission cables such as CV cables.

(Effects of the Invention) In the cable laying method for a cave according to the present invention, the cable laying operation can be continuously performed without using a trolley or the like, and a sufficient passage for work can be secured to perform work. Can be done safely.

Further, since the cable laying device of the present invention has the above-mentioned configuration, a cable having a large unit weight is arranged at a predetermined height in the cave by using a member having a relatively simple configuration. It can be laid in a trough that has been cut.

The device used in the present invention is only a mounting bracket attached to each strut, a roller device provided in the bracket, and a slide rod for laterally moving the cable. , The configuration can be simple.

When laying the cable, the cable is moved in the length direction by a roller device and the cable is moved in the lateral direction by sliding it on the slide rod by its own weight. Since it is possible, the work of moving the cable onto the trough becomes easy.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a cable laying method of the present invention, FIG. 2 is a perspective view showing a configuration of an apparatus used in the present invention, and FIG. 3 is a cable laying apparatus and a trough arranged in a cave. FIG. 4 is an explanatory diagram showing the relationship, and FIG. 4 is an explanatory diagram in the case where the cable feeding device is attached to the column. Reference numeral 1 in the figure 1 ... Caveway, 2 ... Post, 4 ... Floor, 5 ... Work cart,
10 ... Cable rack, 11 ... Side pillar, 12 ... Trough support member, 15 ... Trough, 20 ... Cable, 23
...... Cooling water pipe, 25 …… Cable feeding device,
30 ... Mounting bracket, 31 ... Pin hole, 33 ...
Slide rod support bracket, 34 ... Hole, 35 ... Roller support block, 40 ... Roller device, 42 ... Support arm, 45 ... Wire, 50 ... Slide rod, 55 ...
Arm, 56 ... Arm mounting member.

Claims (1)

[Claims] 1. In a cavern with a plurality of shelves arranged vertically on both sides and a column in the center, the cavern is mounted to the column in the cavern in accordance with the height of the shelves. A slide bar is provided which is provided with a bracket and which is provided with a roller device for guiding the cable through the mounting bracket and a cable feeding device for extending the cable, and which is arranged between the shelf and the trough of the shelf. After the cable is extended in the cave by the roller device, a slide bar is attached in correspondence with the roller device at regular intervals, and the roller device in the section where the slide bar is arranged is shaken. By moving the roller to support the cable, and moving the cable supported by the slide rod toward the trough according to the inclination of the slide rod. , Sinus Hokkaido cable installation method characterized by laying in the trough provided in the cable racks.