JPH0336909A - Cable passing method and conduit communicating means - Google Patents

Abstract

PURPOSE:To improve efficiency of wire passing work by closing one end of a conduit body with an air-tight plug then fixing a traction rope, inserted through an insertion hole, with a wire passing body in the conduit body thereafter feeding compressed air through a vent and pressure feeding the wire passing body to the other end. CONSTITUTION:A traction rope 15 is passed through an air-tight plug 17a then the tip of the traction rope 15 is fixed to a wire passing body 18 fitted rotatably in a conduit body 13. Then an air supply hose 19 is passed through the air-tight plug 17a and the air-tight plug 17a is fitted, while being pressed, to one end of the conduit body 13. When the valve of a compressor 14 is opened and compressed air is fed into the conduit body 13, the wire passing body 18 is pressure fed to a target manhole 12 together with the traction rope 15. By such a method, the cable traction rope 15 is passed through single pressure feed operation then optical cables are pulled in.

Description

[Detailed description of the invention] [Objective of the invention] (Industrial use!'F) The present invention improves the efficiency of wiring work when passing a cable through a conduit body and throwing it. The present invention relates to a cable routing method and a conduit communication means for carrying out the method.

(Conventional technology) Generally, cables made of metal wires or glass fibers are
Manholes are placed at appropriate locations from the sending end to the destination @, for example, every 200 m, and pipe bodies made of ducts are buried between the manholes and laid within these pipe bodies. This fabrication and installation process includes threading work such as cable traction ropes through the conduit body. There are various methods for this wiring work, including a pneumatic wiring method, an electric wiring method, and a manual wiring method.

The wiring work will be briefly described using the typical pressure air wiring method as an example.

In FIG. 10, a conduit body 3 consisting of a duct is buried between the sending end manball l and the reaching end manhole 2. A compressor 4 is placed on the roadside side, an airtight stopper 5 is fitted into an opening at one end of the pipe body 3, and compressed air from the compressor 4 is sent into the pipe body 3 through a pressure-resistant hose.

A wire 6 with a diameter of 2 m is introduced into the conduit body 3 through the airtight stopper 5, and a wire passage body 7 is attached to the tip thereof.

Then, compressed air is sent into the pipe body 3 from the compressor 4, and the pressure causes the passage 11 body 7 to reach the end manhole 2.
move it to.

At the reaching end man 1 Neil 2 side, the wire passing body 7 that has reached is removed from the wire 6, and a cable traction rope 8 is attached to the tip of the wire 6. In the roadside manhole t (PI), after confirming the attachment of the cable towing rope 8, the wiring wire 6 is rewound using compressed air or human power to complete the wiring.

In general, the time required for wiring is 15 minutes when unwinding with compressed air and 30 minutes when using manual labor for a standard span (200 m) pipe body, not including preparation.

In addition, if there is an abnormality such as a dislocation or unevenness in the conduit body, it can be detected by checking the condition of the conduit passing through the conduit with the pneumatic wiring method, but it cannot be detected with electric or manual wiring.

(Problems to be Solved by the Invention) As mentioned above, the conventional wiring method involves the work of first passing a thin wire and then replacing it with a cable traction rope capable of towing the cable, which is extremely inefficient. In addition, it is necessary to move the compressor and other working equipment for each pipe body, and since it is a heavy object, a considerable amount of manpower and time is required to move it, which further reduces efficiency.

The present invention was made in order to solve the above-mentioned problems, and an object of the present invention is to provide a cable running method that significantly improves the running efficiency, and a conduit communication means for carrying out the method. .

[Structure of the invention]

(Means for Solving the Problem) In order to achieve the above object, the cable routing method of claim (1) provides a method for connecting a plurality of manholes arranged in sequence to a conduit body. A cable routing method for laying cables, in which one end of the conduit body is closed with an airtight stopper that has an insertion hole for passing the traction rope that pulls the cable through and a vent hole for compressed air, and the traction rope is inserted through the insertion hole. The towing rope is attached to a movable wire carrying body within the conduit body, and the towing rope is passed from the sending end manhole to the reaching end manhole by inflowing compressed air from the ventilation hole and feeding the wire carrying body under pressure to the other end. , and the compressed air is supplied from the sending side through the conduit body.

The conduit communication means of claim (2) further includes a main body that is inserted into the conduit body and airtightly closes the conduit body, a ventilation hole that penetrates the main body in the insertion direction, and a ventilation hole that penetrates the main body in the insertion direction. A configuration characterized by comprising a pair of airtight plugs having an insertion hole with a cut through which a towing rope is inserted and removed from the outside, and a communication pipe that airtightly communicates the ventilation holes of these airtight plugs. It is.

Moreover, the conduit communication means of claim (3) is a configuration characterized in that, in the configuration of claim (2), one of the airtight plugs does not have an insertion hole.

(Function) According to the invention of claim (1), since the towing rope that can be towed on the cape j is directly connected to the 3111 line, the work of replacing the cape is omitted and the work efficiency is improved. Furthermore, since the towing rope is extended over the entire length of the conduit body and compressed air is sent from the sending end using the conduit body, there is no need to move the compressor or other heavy work equipment.

Further, according to the invention of claim (2), since the pipe bodies are airtightly communicated while holding the towing rope, compressed air can be efficiently sent from the sending end side through these pipe bodies. . Therefore, there is no need to move the compressor.

Furthermore, according to the invention of the Mth item (3), even when there is no towing rope, compressed air does not leak undesirably.

(Actual Proportionality) Details of the present invention will be explained below with reference to embodiments shown in FIGS. 1 to 9.

Figures 1 and 2 show a first embodiment in which a cable is laid between two manholes.

FIGS. 3 and 4 show a second embodiment in which cables are laid between a plurality of manholes, some of which have already been laid.

FIGS. 5 and 6 show a third embodiment, in which a cable is laid between a plurality of manholes.

7 and 8 show an example of the airtight plug used in each embodiment, and FIG. 9 similarly shows an example of the pipe communication means.

In addition, although nylon ropes have traditionally been used as towing ropes for towing cables, in this example polyamide m-fiber (registered trademark Kevlar) ropes are used, and their properties are not listed in the table. This is an indication.

The example in Table 1 will be described with reference to FIGS. 1, 2, and 7.

A sending end manhole 11 serving as a starting point for conducting the wire and a reaching manpole 12 serving as a reaching point are provided, and a conduit body 13 is buried between them. A rope reel device 16 is installed on the ground at the feeder @Ill for winding and unwinding a traction rope 15 made of polyamide fiber for towing a compressor 14 and an optical cable (not shown).

In preparation for the wiring work, the tow rope 15 is passed through an airtight stopper 17a, which will be described later, and its tip is attached to a passage member 18 that is movably fitted into the conduit body 13. Then, the air supply hose 19 made of a pressure-resistant rubber hose (outer diameter 25 mm) that guides the compressed air sent from the compressor 14 is connected to the airtight stopper 17a.
After passing through, the airtight stopper 17a is pressed against one end of the conduit body 13, and preparation for fitting is completed.

FIG. 7(A) shows the above-mentioned airtight plug 17a.

This will be explained with reference to (B). Reference numeral 21 denotes a main body, which is made of a rubber-like member formed in a Y-shaped shape, and a flange 23 is provided at the opening 22, and an outer circumferential surface 24 is formed into a tapered shape with a larger diameter on the flange side.

A vent hole 26 with an inner diameter of 25 mm is provided in the bottom portion 25 for inserting and attaching an air supply hose 19 or the like. Further, an insertion hole 27 having an inner diameter of 511II is provided apart from the ventilation hole 26. This holds the towing rope 15 between the outer diameters 4 so that it can be inserted freely, and the towing rope 15 can be attached from the outside by a notch 28 that reaches the outer peripheral surface 24.
Leaving is now easy. When it is fitted into the pipe body 13 by pressure, it contracts due to elasticity,
The pipe end is closed airtight, and the vent hole 26 is inserted into the vent hole 26.
For example, the air supply hose 19 is in close contact. In addition, to install the air supply hose 19, after inserting it, put a spacer on both sides and fix it with a stopper.

Now, when the preparation is completed, the valve of the compressor 14 is opened and pressure #l air with a pressure of about 700 g/- is supplied into the pipe body 13, and the line body 18 is forcedly fed by that pressure.
Together with the towing rope 15, it reaches the reaching end manpole 12 as shown in FIG. As a result, the wiring of the towing rope 15 for towing the cable is completed with one pressure feeding, and thereby the optical cable is towed and the wiring is completed.

Next, a second embodiment will be described with reference to FIGS. 3, 4, 8, and 9.

As mentioned above, this goes through multiple manholes,
This is the case when there is an empty pipe body therein.

An intermediate manhole 31 is provided between the sending end manhole 11 and the reaching end manhole 12.
A pipe body 32 is buried between the intermediate manhole 1 and the intermediate manhole 31, and a pipe #33 is buried between the intermediate manhole 31 and the reaching manhole 12.

Further, another pipe body 32a is buried parallel to the pipe body 32. On the sending end side, a compressor 14 and a rope reel device t6 are installed, as in the first embodiment.
This rope reel outfit! The towing rope 15 taken out from 16 passes through the pipe body 32a and enters the intermediate manhole 31.
It has been derived. Therefore, the towing rope 15 passes through the conduit body 32a, passes through the intermediate manhole 3, passes through the conduit body 33, and is routed to the end manhole 12, so that the conduit body 32 becomes an empty conduit body. Become.

In this embodiment, in addition to the above-mentioned airtightness 17a, a similar airtightness 17b is used, and together with an explanation of this, the pipe communication means 35a and 35b constituted by these will be explained.

As shown in FIGS. 8A and 8B, the airtightness 17b described above has the same configuration as the airtightness 17a shown in FIG. 7, except that the airtightness 17b is provided with an insertion hole 27. The only difference is that it is not.

Further, the conduit communication means 35a is airtight 17a, as shown in FIG. 9 (the insertion hole is omitted).

17a are airtightly connected to each other by a communication pipe 17c made of a pressure-resistant rubber hose.The communication pipe 17c is attached by fitting rubber spacers at both ends and fixing these with metal fittings.

Further, the conduit communication means 35b has a similar structure, but is configured by airtightly communicating the airtightness 17a and the airtightness 17b through a communication pipe 17c.

In this embodiment, although not shown, the wire passage body 18 in the empty pipe body 32 is first moved to the intermediate manhole 31 by the same operation as in the first embodiment.

After that, in the sending end manhole 11, the airtightness 17a is removed, and the airtightness 17b with the air supply hose 19 attached is attached to the empty pipe body 3.
Attach it to 2.

On the other hand, in the intermediate manhole 31, the wiring body and the towing rope 15 are extracted from the conduit body 32a, and the airtightness 17
The airtight member 17b of the pipe communication means 35b, which communicates the airtight member 17a with the airtight pipe 17C, is attached to the empty pipe body 32. After inserting into the insertion hole 27 from the outside through the cut, the airtight member 17a is attached to the conduit body 33.

After the above-mentioned preparations are completed, the valve of the compressor 14 is circled seven times, and the wire passage body 18 is moved to the reaching manhole 12.

Next, a third embodiment will be described with reference to FIGS. 5 and 6. As mentioned above, is this multiple Manho? This is the case when there is no empty pipe body.

As in the previous embodiment, a sending end manhole 11, an intermediate manhole 31, and a reaching manhole 12 are provided, and a pipe body 32 and a pipe body 33 are buried between them. A compressor 14 and a rope reel device 16 are installed at the feeder.

First, the airtightness 17a is attached to the sending end manball 11, and the wire passing body 1 is connected by the same wire passing operation as in the first embodiment.
8 to the adjacent intermediate man ball 31. After moving,
As shown in FIG. 5, in the intermediate manhole 31, the wire passage body 18 to which the towing rope is attached is placed in the conduit body 33, and the conduit communication means 35a is attached to both conduit bodies 32 and 33. .

The preparation is now complete, the valve of the compressor 14 is opened, compressed air is supplied to the pipe body 33 via the pipe body 32, and the wire passage body 18 is moved to reach the reach manhole 12.

Even when the wire is routed across multiple manholes as in this embodiment, by repeating the passage a operation of the first embodiment for each conduit body, there is no need to replace the multiple conduit bodies. We can send you a tow rope. Also,
At this time, the compressed air can be supplied from the sending end through the conduit body through which the wire has been passed, so there is no need to move a compressor or the like, and the efficiency of the wire flow is significantly improved.

Furthermore, by using the pipe FI11 communication means of this embodiment, the pipe bodies can be connected and communicated in an airtight manner, so that the towing rope can be held smoothly and compressed air can be sent to the wire management body without waste. .

In this embodiment, the case where there are two or three manholes has been described, but the present invention is not limited to this, and the material, dimensions, etc. of the towing rope are not limited to those in this embodiment.

〔Effect of the invention〕

As described in detail above, the gable wiring method of the present invention allows the towing rope to be threaded in one go without replacing the gable, so that the work efficiency is extremely high.

Furthermore, since compressed air can be constantly supplied from the feed fRAIIFJ, there is no need to move the congressor, etc., significantly improving work efficiency.

Furthermore, the pipe communication means of the other invention not only smoothly holds the towing rogue, but also communicates the pipe bodies in an airtight manner, so that an excellent compressed air supply path can be provided. Furthermore, there is an outside a in the insertion hole! 1 is provided, so it is easy to insert and remove the towing rope, resulting in good workability.

[Brief explanation of drawings]

Figures 1 and 2 show the first gable wiring method of the present invention.
FIGS. 3 and 4 are explanatory diagrams of the second embodiment, FIGS. 5 and 6 are explanatory diagrams of the third embodiment, and FIG. 7 (A) is an explanatory diagram of the third embodiment. The main part side view of the pipe communication means of the song's invention, FIG. 7<B) is also 1 of FIG. 7(A).
3-841, FIG. 8(A) is a side view of other important parts, and FIG. 8(B) is a cross-sectional view taken along the line 3-841.
A sectional view taken along the line 3-8, FIG. 9 is also a sectional view,
FIG. 0 is an explanatory diagram of a conventional example. 11... Sending end manhole 12... Reaching end manpole 13... Pipeline body 15... Towing rope 17a... Airtight pillars 1, 7 b... Same as above 17c... Passing pipe 18...・Wiring body 21...Main body 23...Pipeline body 26...Vent hole 27...Insertion hole 28...Notch 31...Manhole 32...Pipeline body 33...Same Upper 35a...Pipe communication means 35b...Same as above

Claims (3)

[Claims] (1) A cable routing method in which a cable is laid in a conduit body provided by sequentially connecting a plurality of manholes, which includes an insertion hole through which a towing rope for pulling the cable is passed, and compressed air. One end of the conduit body is closed with an airtight stopper having a ventilation hole, and the towing rope inserted through the insertion hole is attached to the wire-carrying body which is movable within the conduit body, and compressed air is flowed in through the ventilation hole to move the wire-carrying body to the other body. A cable threading method characterized in that a towing rope is passed from a sending end manhole to a reaching end manhole by a threading operation in which the cable is fed under pressure to the end, and compressed air is supplied from the sending end side through a conduit body. line method. (2) A main body that is inserted into the conduit body and airtightly closes it, a ventilation hole provided through the main body in the above insertion direction, and a traction rope provided through the main body in the above insertion direction from the outside. A conduit communication means comprising: a pair of airtight plugs having an insertion hole with a notch for insertion and removal; and a communication pipe that airtightly communicates the ventilation holes of the airtight plugs. (3) The conduit communication means according to claim (2), wherein one of the airtight plugs does not have an insertion hole.