JPH04322114A - Laying structure of underground communication line - Google Patents

Abstract

PURPOSE:To simplify the laying work of underground communication line. CONSTITUTION:Containing holes 14, 15 are made in the end faces of a plurality of L-type gutters 11, 12 laid in parallel along a road. A series of the containing holes 14, 15 are made in the L-type gutters 11, 12 from one side to the other side thereof. A plurality of L-type gutters 11, 12 are then arranged while matching the containing holes 14, 15 and communication lines are laid therein. Since the containing holes 14, 15 provide a communication line laying space, digging work of road 2 is not required.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground communication line installation structure for laying communication lines underground.

0002

2. Description of the Related Art Conventionally, in order to lay communication lines underground and connect them to customers, a method has been adopted in which a trench is dug under a sidewalk and the communication line is buried in the trench. When burying communication lines, metal or vinyl pipes were buried underground and the communication lines were housed inside the pipes, or cable blocks with an upward U-shaped cross section were used. This will be explained with reference to FIGS. 7 to 9.

FIG. 7 is a perspective view showing a conventional underground communication line installation structure using conduits, FIG. 8 is a sectional view of a conduit in a conventional underground communication line installation structure, and FIG. 9 is a diagram showing a cable block. It is a perspective view showing the installation structure of the conventional underground communication line used. In these figures, 1 is a house, 2 is a sidewalk, and cables serving as communication lines are buried under the sidewalk 2. 3 is a distribution cable, and 4 is a drop-in cable. In the example shown in FIG. 7, the distribution cable 3 is installed in the distribution pipe 5, and the drop-in cable 4 is installed in the drop-in cable pipe 6. The distribution tube 5 is arranged below the drop-in cable tube 6, and includes three distribution tubes 5 and one drop-in cable tube 6.
are arranged parallel to each other. Reference numeral 7 denotes a branch pipe for a drop-in cable for pulling the drop-in cable 4 into the house 1, one end of which is connected to the drop-in cable pipe 6, and the branch pipe 7 crosses under the sidewalk 2 from the drop-in cable pipe 6 to the house 1. It has been extended. Reference numeral 8 denotes a cable box, which has an upwardly U-shaped cross section and is buried under the sidewalk 2. In this cable box 8, the distribution cable 3 and the drop-in cable 4 are installed in pipes (a distribution pipe 5, a drop-in cable pipe 6).
) was installed without using. Note that three cable storage racks are provided in the cable box 8 in the vertical direction, and a plurality of wiring cables 3 and a plurality of lead-in cables 4 are installed in each rack. 9 is the cable box 8
This branch pipe 9 is connected to the side of the cable box 8.

Next, the procedure for laying the distribution cable 3 and the lead-in cable 4 underground as described above will be explained. First, the existing pavement surface of sidewalk 2 is cut and crushed, and
excavate underneath. Next, after securing the earth, the wiring pipe 5,
A lead-in cable pipe 6 or cable box 8 is placed in the excavated area. Subsequently, the distribution cable 3, lead-in cable 4, etc. are laid, and the excavated part is backfilled and the distribution pipe 5 is installed.
, bury the lead-in cable pipe 6 and cable box 8. After that, the pavement will be restored and the installation work will be completed. In addition, when providing the branch pipes 7 and 9 for the lead-in cables, the pipes are installed at predetermined positions before filling the lead-in cable pipes 6 and the cable box 8.

[0005]

[Problems to be Solved by the Invention] However, in the conventional underground communication line installation structure in which the area under the sidewalk 2 is excavated and cable installation pipes and cable boxes are buried, the cables are first installed on the existing paved surface. The process involves cutting and crushing the concrete, then backfilling it after installing the pipe or cable box, and then restoring the pavement. For this reason, there were problems in that the construction time was long and, moreover, a large amount of construction cost was required. In particular, if the wiring pipe 5 and the lead-in cable pipe 6 are arranged in two stages, upper and lower, as shown in Fig. 7, and the lower pipe is laid in three rows side by side, the excavation depth and excavation width will be large. This results in even higher construction costs. In addition, since the cable box 8 is a large structure, if water pipes or sewage pipes are buried in the area where the cable box 8 is buried, it is likely to interfere with these pipes, and in such cases, it is difficult to bury them. These water pipes and sewage pipes will have to be relocated. Furthermore, in order to install new branch pipes 7 and 9 for the drop-in cables when the number of customers increases, the burying work consisting of the series of steps described above must be carried out again, which takes a long time. Moreover, the construction cost will be high.

[0006]

[Means for Solving the Problems] The underground communication line installation structure of the present invention includes a plurality of block bodies arranged in parallel along a road to form the boundary of the road, and a cable hole opened at the end face of the block body. are provided in a series from one side to the other, a plurality of blocks are arranged side by side with the cable holes lined up, and communication lines are laid through the cable holes.

[0007]

[Function] Since the cable hole in the block body becomes the installation space for the communication line, the installation space for the communication line can be provided underground without excavating the sidewalk.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 3. FIG. 1 is a sectional view showing the installation structure of the underground communication line according to the present invention, FIG. 2 is a plan view showing the installation structure of the underground communication line according to the invention, and FIG. 3 is a cross-sectional view showing the installation structure of the underground communication line according to the invention. FIG. 2 is a perspective view of an L-shaped gutter used in the installation structure. In these figures, the same or equivalent members as those explained in FIGS. 7 to 9 are given the same reference numerals, and detailed explanations will be omitted. In these figures, 11 and 12 are L-shaped gutters as block bodies according to the present invention, and these L-shaped gutters 11 and 12 are installed on the boundary between the sidewalk 2 and the roadway 13, and are installed along the roadway 13. They are lined up. Although these L-shaped side grooves 11 and 12 are formed in a T-shaped cross section as shown in FIGS. 1 and 3,
It is usually called an L-shaped gutter because it is exposed in an L-shape on the ground surface.

Reference numeral 14 designates an accommodation hole serving as a cable hole through which the distribution cable 3 is passed, and reference numeral 15 indicates an accommodation hole serving as a cable hole through which the lead-in cable 4 is passed. These accommodation holes 14
, 15 are arranged vertically in the side wall of the L-shaped gutter 11, 12 on the side of the sidewalk 2, with the accommodation hole 14 positioned on the lower side, and are aligned with the adjacent L-shaped gutter in the L-shaped gutter 11, 12. An L-shaped side groove 11 that is opened on the contacting end surface.
, 12 are provided in series from one side to the other. The L-shaped side grooves 11 and 12 are arranged in the accommodation hole 1.
4 and 15 are arranged along the longitudinal direction of the accommodation holes 14 and 15 so that the holes 4 and 15 are continuous.

Reference numeral 16 denotes a branch path through which the lead-in cable 4 drawn into the house 1 passes, and this branch path 16 is connected to the L-shaped side gutter 12.
It is formed on the side wall of the sidewalk 2 side, one end of which opens into the end surface of the L-shaped gutter 12 on the sidewalk 2 side, and the other end opens into the accommodation hole 15. That is, in the L-shaped gutter 12, a passage for the lead-in cable 4 is formed by the accommodation hole 15 and the branch path 16.

Next, the L-shaped side gutter 11 constructed as described above
, 12 will be described below. When newly installing the distribution cable 3 and the lead-in cable 4 underground, the existing L-shaped gutters are replaced with L-shaped gutters 11 and 12 according to the present invention. That is, either remove the existing L-shaped gutter at the position where the cable is to be laid, or install a new L-shaped gutter 11, 1 according to the present invention.
Install 2. Next, insert the wiring cable 3 into the accommodation hole 14,
The lead-in cables 4 are passed through the accommodation holes 15 and installed. In addition, when pulling the lead-in cable 4 into the house 1, an L-shaped side gutter 12 is arranged at a position corresponding to the lead-in position. In order to extend the lead-in cable 4 to the house 1 side, first,
The drop-in cable branch pipe 7 is connected and installed to the opening of the branch path 16, and then the drop-in cable 4 is inserted into the accommodation hole 15.
From there, the wiring is routed through the branch path 16 and the branch pipe 7 for the lead-in cable. Moreover, as mentioned above, the L-shaped side grooves 11 and 12
Even when the number of customers increases and a new drop-in cable 4 is to be laid after the cable has been laid using the cable, the branch pipe 7 for the drop-in cable is installed in the branch path 16 of the L-shaped gutter 12 at the position where the drop-in cable 4 is to be laid. By connecting the cables, a space for installing the lead-in cable can be provided at a predetermined position.

Therefore, as mentioned above, the L-shaped side groove 11
, 12, the accommodation holes 14, 15 and the branch path 1
Since 6 is the installation space for the communication line, the installation space for the communication line can be provided underground without excavating the sidewalk 2. For this reason, it is possible to lay the distribution cable 3 and the lead-in cable 4 underground without necessarily carrying out all the steps of pavement cutting, crushing, excavation, earth retaining, cable line member installation, backfilling, and pavement restoration. can.

[0013]Although this embodiment shows an example in which the block body is constituted by L-shaped side gutters 11 and 12, the block body may also be constituted by site boundary blocks as shown in Figs. 4 to 6. . FIG. 4 is a sectional view showing another embodiment in which a block body is constructed from land boundary blocks, FIG. 5 is a plan view showing another embodiment in which a block body is constructed by land boundary blocks, and FIG. It is a perspective view of the land boundary block which constitutes. In these figures, the same or equivalent members as those explained in FIGS. 1 to 3 are given the same reference numerals and detailed explanations will be omitted. In these figures, 21 is a land boundary block, and this land boundary block 21 is installed on the boundary between a public road such as a road 22 and a private land on the side of the house 1, and a plurality of land boundary blocks 21 are lined up along the road 22. ing. The site boundary block 21 is provided with an accommodation hole 14 through which the distribution cable 3 is passed, and an accommodation hole 15 through which the lead-in cable 4 is passed, which are arranged vertically. These accommodation holes 14 and 15 are opened in the end face of the site boundary block 21 that is in contact with the adjacent site boundary block in the same manner as described in the previous embodiment, and are opened from one side of the site boundary block 21. Each is provided in series toward the other side. Then, the site boundary block 21 is arranged so that the accommodation holes 14 and 15 are connected to each other.
, 15 are arranged along the longitudinal direction. Further, a site boundary block 21 provided with a branch path 16 is disposed at a position corresponding to a position where the lead-in cable 4 is pulled into the house 1. In addition, in order to extend the drop-in cable 4 to the house 1 side, first connect and install the drop-in cable branch pipe 7 to the opening of the branch path 16, and then branch the drop-in cable 4 from the accommodation hole 15. The wiring is routed through the channel 16 and the branch pipe 7 for the drop-in cable. Even if the block body is constituted by the ground boundary blocks 21 in this way, the same effect as in the above embodiment can be obtained.

[0014]

[Effects of the Invention] As explained above, the underground communication line installation structure according to the present invention has a plurality of block bodies arranged side by side along the road to form the boundary of the road, and an opening at the end face of the block body. A series of cable holes were provided from one side to the other, a plurality of blocks were arranged in parallel with the cable holes, and communication lines were laid in the cable holes, so that the cable holes of the block bodies were used for communication lines. This creates a space for laying communication lines underground, without having to excavate the sidewalk. Therefore, the work of laying communication lines underground can be simplified, so that construction time can be shortened and construction costs can be kept low. In addition, because the configuration uses blocks such as L-shaped gutters and land boundary blocks, even if there are existing buried pipes for water, gas, sewage, power cables, etc. Since the communication line installation space is provided at a shallow position, there is also the effect that there is no need to relocate these existing buried pipes.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the installation structure of an underground communication line according to the present invention.

FIG. 2 is a plan view showing the installation structure of an underground communication line according to the present invention.

FIG. 3 is a perspective view of an L-shaped gutter used in the underground communication line installation structure according to the present invention.

FIG. 4 is a cross-sectional view showing another embodiment in which a block body is constructed from land boundary blocks.

FIG. 5 is a plan view showing another embodiment in which a block body is constructed of land boundary blocks.

FIG. 6 is a perspective view of a land boundary block that constitutes a block body.

FIG. 7 is a perspective view showing a conventional underground communication line installation structure using a conduit.

FIG. 8 is a sectional view of a conduit in a conventional underground communication line installation structure.

FIG. 9 is a perspective view showing a conventional underground communication line installation structure using cable blocks.

[Explanation of symbols]

3. Wiring cable 4 Drop-in cable 11 L-shaped gutter 12 L-shaped gutter 13 Roadway 14 Accommodation hole 15 Accommodation hole 16 Fork road 21 Site boundary block 22 Road

Claims (1)

[Claims] Claim 1: A plurality of block bodies arranged side by side along a road to form a boundary of the road are provided with cable holes opening in the end face of the block body in a series from one side to the other side,
A plurality of these block bodies are arranged in parallel by connecting the cable holes,
An underground communication line installation structure, characterized in that a communication line is installed in the cable hole.