JP4099693B2 - For branching underground power communication lines and branching underground power communication lines - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention allows a desired cable to be branched from a power communication line such as a power cable, a telephone line, a cable for CATV, or a cable for cable broadcasting buried in the ground as needed, and efficiently in a store or a residence. The present invention relates to a branching method of a power communication line for wiring and a branching device, and belongs to power / communication wiring technology.
[0002]
[Prior art]
In order to enhance the scenery of the road and ensure smooth road traffic, power communication lines such as power cables and telephone lines are mainly buried in the ground.
In particular, the following means have been proposed or adopted as a method of supplying communication cables such as telephone lines, CATV cables, and cable cables to general consumers such as stores and residences.
[0003]
One example is the use of manholes and handholes arranged at intervals of 40 to 50 m along underground grooves in which communication cables are housed, for example, manholes closest to stores and residences to be wired This is a method in which a communication cable is branched at a handhole and the branched cable is wired to a store or a residence.
[0004]
Further, in JP-A-4-203690, by forming a protruding portion along the peripheral surface of the through hole on the inner surface side of the top portion of the saddle portion, and forming the protruding height of the protruding portion to be greater than the wall thickness of the main pipe. There has been proposed a method of branching directly from a communication system cable using a branch pipe joint that does not damage the inserted cable or the like.
[0005]
[Problems to be solved by the invention]
However, the method using a manhole or handhole is easy to branch because the size of the manhole or handhole itself, that is, the diameter or side is 1000 mm or more, usually 1200 to 1600 mm. The installation is limited in terms of space and cost, and is usually provided at intervals of 40 to 50 m along the underground trench.
For this reason, it is relatively easy to branch a cable from a communication cable, etc. if the store or residence of a customer requiring communication is near the manhole or handhole, but the manhole or handhole To branch a cable from a communication cable and pull it into a store or residence that is far from the site, you must dig up the ground for a considerable distance, and a considerable work period and cost are required for the cable branching or pulling in. There was a problem that.
[0006]
On the other hand, the method using the branch pipe joint can branch the communication cable near the store or residence that is the consumer to supply, and can shorten the ground to be dug for wiring and piping. In order to join the pipe joint to the protection pipe of the communication system cable, it is necessary to dig up the ground to expose the communication system cable buried in the ground.
Also, depending on the communication line to be supplied, etc., there is a construction problem that a branch fitting suitable for each protection pipe is selected, and even if they are the same one, a plurality of pipe fittings must be selected and joined separately. is there.
[0007]
In view of the current situation, this invention shortens the lead-in construction period and facilitates construction when drawing an arbitrary cable from a power communication line buried in the ground into a store or a residence that is a consumer. underground power distribution method and masu for underground power communication line branch of the communication line can in which the providing cents to.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 of the present invention provides:
In order to relay a power communication line protected by a protective tube buried in the ground, between the hand holes arranged in the path of the protective tube with a necessary interval,
And mass mainly having a lead-pipe connecting portion has an opening that exposes the ground surface at the top, and the branching masu made of synthetic resin comprising a height-adjustable cylindrical standing pipe provided, any interval Installed in the path of the protective tube at
Branch the power communication line you want to branch at the handhole closest to the branch for the desired power communication line to be pulled in,
This is a branching method for underground power communication lines characterized in that the branched cable is routed through the protective tube until the branching maser, and the branching cable is wired to the target building. .
[0009]
The invention according to claim 2 of the present invention is
In each of opposite side walls, power communication cable, a branch cable branched from the communication cable and their cables, provided with a receptacle for receiving the protective tube in which a plurality of inner tubes housed individually is disposed,
A lead-in pipe connection part for drawing the branch cable into a target building,
A main body made of synthetic resin provided on the side wall surface orthogonal to the side wall ;
A cylindrical standing pipe that is attached to the upper opening of the main body so as to be adjustable in height and has an opening exposed to the ground surface ;
It is a device for branching underground power communication lines , characterized by comprising a lid that is detachably attached to the upper opening of the standpipe.
[0010]
The invention according to claim 3 of the present invention is
Said subject is
A ground having a sleeve of a required length is attached to a receptacle of a protection tube of a power communication line provided on each of opposite side walls, and an end of the protection tube is connected to each sleeve so as to be able to advance and retreat within a required range. It is for branching of embedded power communication lines .
[0011]
The invention according to claim 4 of the present invention is
The sleeve is
At its end, an underground power communication line branching Masu, wherein a fixing plate having a bellmouth is provided for fixing the cable protection tube.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of an underground buried power communication line branch according to the present invention will be described below with reference to the accompanying drawings, and an underground buried power communication using this underground buried power communication line branching mast. A method of branching lines will be described.
[0013]
In FIG. 1, for branching to draw underground power communication lines into buildings X such as homes and factories, 1 is a main body 2 formed of a synthetic resin such as polyvinyl chloride, and the above-mentioned main body and 2 stand pipe 3 that is erected on and is formed from a lid 4 which is removably attached to the top opening of the standpipe 3.
[0014]
The main body 2 is formed of a cylindrical body whose bottom is normally closed by a bottom lid 2a and whose top is opened, and a receiving port 2b for receiving an end of a protective tube 7 that accommodates a power communication line on each opposing wall surface, 2b is formed integrally, and a lead-in pipe connecting portion 2c for drawing a branched cable, which will be described later, into the building X is formed on the side wall surface orthogonal to the receiving ports 2b and 2b.
[0015]
As shown in FIG. 2, each of the receiving ports 2b is connected to end portions of protective tubes 7 and 7 for accommodating power communication lines. At this time, each receiving port 2b is required to be made of a synthetic resin. By connecting the sleeves 8 and 8 in length and connecting the end portions of the protective tubes 7 and 7 to the respective sleeves 8 and 8 so as to be able to advance and retreat, the crust fluctuates due to an earthquake or the like, and the protective tube 7 extends slightly. Even if it shrinks, it can be absorbed.
[0016]
In the upper opening of the main body 2, the base end portion of the cylindrical riser 3 is inscribed and held with a seal ring member 5 interposed therebetween. The member 6 is externally held, and the lid 4 is detachably attached to the lid receiving member 6. The height of the stand tube 3 can be adjusted within a required range.
[0017]
Branch cable protection tube 12 to place the lead-pipe connecting portion 2c is preferably a plurality, more preferably be those installed three, have the preferred to allow the fixed bell mouth shape.
In addition , the opening of the lead-in pipe connecting portion 2c closes the entire opening with a lid (not shown) so that foreign matter does not enter the main body 2 when the branch cable is not drawn. In the branch cable protection pipe, the opening of the branch cable protection pipe that is not used is also closed by the lid.
[0018]
For the underground power communication line branch 1 having such a structure, an arbitrary interval is provided between the hand holes 11 that relay the underground power communication line as shown in FIG. 3 (the other hand hole is not shown). In other words, it is installed at each point where it is expected to be pulled in in the future.
[0019]
As shown in FIG. 4, the hand hole 11 is composed of a box main body 11a having an upper opening and a lid 11b attached to the opening. As described above, an operator can enter the hand hole 11. For example, an insertion hole 11c for inserting a power cable and a communication cable such as a telephone are inserted into a wall surface having a certain size and located on the same axis as the protective tube 7 of the power communication line. 11d and an insertion hole 11e for inserting a protective tube in which a plurality of communication cables such as CATV are converged are formed.
[0020]
For underground power communication line branch 1 installed at an arbitrary point is for drawing a cable branched from the power communication line into the building X. In this embodiment, three cables, a telephone cable A, a CATV cable B, and a cable cable C, are accommodated and described as a protective tube 7.
[0021]
The cable for telephone is already drawn in the cable, and further, the cable B for CATV and the cable C for cable broadcasting are connected to the building X through the branching cable 1 located on the right side of FIG. When pulling in, in the hand hole 11 closest to the building X, the cable B and the cable C are branched, and one end of the branched branch cables b and c are buried in the underground through the protective tubes 7 and 7. Wire up to 1 for branching power communication lines .
[0022]
Next, the branch cables b and c sent to the underground power transmission line 1 for the underground buried power communication line are respectively routed in the building X through the branch cable protection pipe 12 connected and fixed to the lead-in pipe connection portion 2c. Thus, the main line of the cable B for CATV and the cable C for cable broadcasting is sent further through the protective tube 7 connected and fixed to the receiving port 2b of the opposing protective tube.
[0023]
In the above case, the cable branching work from the power communication line is performed in the hand hole 11, and the branched branch cables b and c are branched from the hand hole 11 to the building X via 1 for branching. If the power communication line is a free access type communication pipe, that is, a communication pipe that has multiple trunk lines and lead-in lines in the communication pipe and branches directly from the communication pipe, the cable branch is buried underground This can be done in communication line branch 1.
[0024]
In this embodiment, the sleeve 8 is connected to the receiving port 2b formed integrally with the main body 2 in order to connect the protective pipe 7 of the power communication line to the underground power communication line branch 1 embedded in the ground . The sleeve 8 is inserted and held at one end of the protective tube 7 through a rubber ring so as to be able to advance and retreat. An inner tube (cable protective tube) 9 for holding each cable individually is provided in the protective tube 7. , 9, 9... Are accommodated and held, and the tip of each inner tube (cable protection tube) 9 may be inserted into the protection tube 7 with the bell mouth 10 converged and held. There are no particular restrictions on the means.
[0025]
In addition, although the size of the first for branching underground power communication lines is not limited, in view of ease of installation and economy, a cylindrical one having a diameter of about 300 to 400 mm is preferable. The height may be adjusted to correspond to the embedment depth of the underground buried power communication line , but is usually about 1,000 mm.
[0026]
【The invention's effect】
The underground power communication line branching method of the present invention is for a synthetic resin branch having a lead-in pipe connection portion between hand holes relaying a power communication line protected by a protective pipe buried in the ground. For the branch to install the desired power communication line at an arbitrary interval and to pull in the desired power communication line, branch the power communication line you want to branch at the nearest handhole and branch off the cable until masu for the branch, routed through the protective tube, for wiring in buildings for the purpose of branch cable from masu for the branch, the closest point the branch wires from underground power communication line power communication line This can be done because of the branching ridges arranged at, so that the lead-in line can be greatly shortened and the construction period for the lead-in can be shortened and the construction cost can be reduced.
[0027]
In addition, for the underground power communication line branch of the present invention, a plurality of inner pipes individually accommodating power communication cables, communication cables, and branch cables branched from these cables are arranged on opposite side walls. A main body made of synthetic resin provided with a receiving port for receiving a protective pipe, and a lead-in pipe connection part for drawing the branch cable into a target building, and an upper surface of the ground that is attached to the upper opening of the main body. A synthetic resin standing pipe comprising a cylindrical standing pipe having an opening exposed to the height and adjustable in height, and a lid body detachably attached to the upper opening of the standing pipe. Since it is made of plastic, it can be made smaller by using synthetic resin, can be installed on narrow sidewalks without any problems, and the construction section accompanying cable branching is shortened as much as possible. , It is possible to achieve also be reduced of the construction cost.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an outline of a cable for branching underground power communication lines according to the present invention.
FIG. 2 is an explanatory diagram showing a use state of a burial for branching an underground power communication line in FIG. 1;
FIG. 3 is a conceptual diagram showing a method of branching underground power communication lines according to the present invention.
FIG. 4 is an explanatory diagram of a handhole.
[Explanation of symbols]
1 For underground power communication line branch 2 Mass subject 3 Stand pipe 4 Lid 6 Cover member 7 Power communication line protection tube 8 Sleeve 9 Inner tube (cable protection tube)
10 Bellmouth 11 Handhole 12 Branch cable protection tube

Claims (4)

In order to relay a power communication line protected by a protective tube buried in the ground, between the hand holes arranged in the path of the protective tube with a necessary interval,
And mass mainly having a lead-pipe connecting portion has an opening that exposes the ground surface at the top, and the branching masu made of synthetic resin comprising a height-adjustable cylindrical standing pipe provided, any interval Installed in the path of the protective tube at
Branch the power communication line you want to branch at the handhole closest to the branch for the desired power communication line to be pulled in,
A branching method for a buried underground power communication line, characterized in that the branched branch cable is routed through the protective tube until the branching trough, and the branching cable is wired to a target building. In each of opposite side walls, power communication cable, a branch cable branched from the communication cable and their cables, provided with a receptacle for receiving the protective tube in which a plurality of inner tubes housed individually is disposed,
A lead-in pipe connection part for drawing the branch cable into a target building,
A main body made of synthetic resin provided on the side wall surface orthogonal to the side wall ;
A cylindrical standing pipe that is attached to the upper opening of the main body so as to be adjustable in height and has an opening exposed to the ground surface ;
It is used for branching underground power communication lines , characterized in that it consists of a lid that is detachably attached to the upper opening of the standpipe. Said subject is
A sleeve of a required length is attached to a receptacle of a protection tube of a power communication line provided on each of opposite side walls, and an end of the protection tube is connected to each sleeve so as to be able to advance and retreat within a required range. For underground power communication line branching described in Item 2. The sleeve is
4. The underground buried power communication line branch according to claim 3, wherein a fixing plate having a bell mouth for fixing the cable protection tube is provided at an end thereof.

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