JP4117701B2 - Cable underground pipe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cable underground pipe suitable for a pipe having a small diameter, particularly when a cable is newly laid in a cable used for communication, electric power, broadcasting, and the like.
[0002]
[Prior art]
In general, a cable underground pipe is used for laying a cable. The cable underground pipe is, for example, the terminal equipment closest to the user (customer), and the diameter of the pipe line becomes narrow. Specifically, as shown in FIG. 5A, the cable underground pipe 101 having a diameter of about 25 mm to 50 mm. Is assumed. At that time, as shown in FIG. 5B, a relatively thick cable 103 and a thin cable 105 are combined. For example, when it is determined that the thin cable 105 cannot be accommodated when the thick cable 103 is accommodated, Consider adding another cable underground pipe 101 as shown in FIG. 5 (c) or using a large-diameter cable underground pipe 107 as shown in FIG. 5 (d). Is done.
[0003]
[Problems to be solved by the invention]
However, in the means of FIG. 5 (c) for adding a cable underground pipe, since there are a plurality of independent cable underground pipes 101, for example, on the side wall of a human hole such as a manhole or a hand hole, After each dedicated work hole is opened and attached, watertight treatment work is required again, which not only makes the installation work troublesome but also leads to a significant cost increase during installation.
[0004]
On the other hand, in the means shown in FIG. 5 (d) using a large-diameter underground cable pipe, there are cases of newly installing existing pipes and cases of completely new ones. Once the existing cable burying pipe is removed and removed, it is necessary to perform a new construction again, which causes problems such as a great deal of time, labor, and cost.
[0005]
In the latter case, the occupying cross-sectional area to be buried greatly increases.
[0006]
Therefore, the present invention provides a cable underground pipe that is cost-effective in cable laying, has excellent workability, has a small occupied cross-sectional area, and can cope with existing cable buried pipes without any problems. The purpose is to provide.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to claim 1 of the present invention, a main cable burying pipe having a circular cross section and a ring-shaped cross section formed on the outer periphery of the main cable burying pipe and having an interior formed in a plurality of housing partitions The sub-cable buried pipe is provided with a cut in the longitudinal direction, and is detachable from the outer circumference of the buried pipe along the longitudinal direction with respect to the main cable buried pipe through the cut. It is mounted.
[0010]
As a result, for example, when it is necessary to lay an additional cable for the existing cable due to an increase in demand thereafter, the sub cable is laid from the outer circumference of the buried pipe along the longitudinal direction of the main cable buried pipe . Fit the tube. As a result, the main cable burying pipe in the laying state can be mounted without moving, and the workability is excellent. In addition, since it is possible to increase the number of storage compartments without creating a dead space on the outer periphery of the main cable buried pipe, it is possible to easily accommodate new cables without interfering with existing cables. Become. And since it becomes one buried pipe in a human hole etc., there is no possibility of leading to an increase in attachment cost.
[0011]
According to a second aspect of the present invention, each of the storage partition chambers of the sub-cable buried pipe is formed to have a cross-sectional area smaller than that of the main cable buried pipe.
[0012]
As a result, a large number of accommodating partition chambers can be efficiently formed on the outer periphery of the main cable burying pipe, so that a thin cable can be accommodated in a separated state without interfering with each other. Moreover, the overall occupied cross-sectional area can be kept small.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The first embodiment of the present invention will be specifically described below with reference to the drawing of FIG.
[0014]
FIG. 1 shows a cross-sectional view of a cable underground pipe 1 according to the present invention.
[0015]
The cable underground pipe 1 is composed of an inner main cable buried pipe 3 and an outer sub-cable buried pipe 5 provided on the outer periphery thereof. In this case, the main cable burying pipe 3 and the sub cable burying pipe 5 may be a separate structure or an integral structure. The main cable burying pipe 3 is formed in a pipe shape having a circular cross section with a diameter of about 25 mm to 50 mm used for the terminal equipment near the user, and is continuous along the longitudinal direction.
[0016]
The sub-cable burying pipe 5 is formed in a cross-sectional ring shape along the peripheral wall of the main cable burying pipe 3, and a plurality of accommodating partition chambers 9 are formed by the partition wall 7 inside.
[0017]
Each accommodating partition chamber 9 of the sub-cable buried pipe 5 is set to have a smaller sectional area than the accommodated sectional area of the main cable buried pipe 3. Specifically, it is preferable that each housing partition chamber 9 has a cross-sectional area of about 10 mm × 25 mm with respect to the main cable embedded pipe 3 having a cross-sectional area of a diameter of about 25 mm to 50 mm.
[0018]
The material of the main cable burying pipe 3 and the sub cable burying pipe 5 may be made of metal or synthetic resin. In this case, they may be made of the same material or different materials.
[0019]
According to the underground cable pipe 1 thus configured, for example, when laying a combination of a plurality of cables 11 having a diameter of about 15 mm and a plurality of cables 13 having a diameter of about 8 mm or less, A cable 11 of about 15 mm is accommodated in the buried pipe 3. On the other hand, a cable 13 of about 8 mm or less is divided into the sub-cable buried pipe 5 and accommodated in each accommodation partition chamber 9. At this time, a large number of cables can be efficiently accommodated without interfering with each other, and the occupied cross-sectional area of the entire buried pipe does not greatly increase but can be kept small.
[0020]
In addition, a plurality of standby storage compartments 9 that can be used are obtained. On the other hand, since the cable underground pipe 1 becomes one continuous underground pipe, for example, the attachment to manholes such as manholes and handholes may be the same as the conventional one, which increases the cost associated with the attachment. There is no fear of being connected. Moreover, workability is not impaired.
[0021]
2 and 3 show a second embodiment.
[0022]
That is, the sub-cable buried pipe 5 can be detachably attached from the outer circumference of the buried pipe along the longitudinal direction to the existing main cable buried pipe 3.
[0023]
The sub-cable burying pipe 5 is formed in an independent cross-sectional ring shape, and a plurality of accommodating partition chambers 9 are formed by the partition wall 7 in the same manner as in the first embodiment.
[0024]
As shown in FIG. 3, the sub-cable buried pipe 5 formed in a ring shape has a cut 15 along the longitudinal direction with reference to the partition wall 7, and force is forced from the cut 15 to the left and right (arrow direction). Ri Do can Hirakigeru along the longitudinal direction by the addition of, is in so performed mounted from buried pipe periphery as shown.
[0025]
The material of the sub-cable burying pipe 5 is a flexible material that is always in the state of FIG. 2 where the cut 15 is fastened and can be opened by forcibly applying a force from the cut 15 to the left and right. Made of synthetic resin material.
[0026]
In this case, as shown in FIG. 4, the sub-cable burying pipe 5 is divided into two on the left and right sides in the drawing so that the upper part, which is one of them, is always in a ring shape, and the lower cut 17 is stopped. It is also possible to employ a means such as coupling by a hinge 19 provided with an urging means and opening the hinge 19 left and right as indicated by a chain line with the hinge 19 as a fulcrum. In the case of this embodiment, it is possible to make the sub-cable buried pipe 5 from a rigid material.
[0027]
Since the other components are the same as those in the first embodiment, the same reference numerals are given and detailed descriptions thereof are omitted.
[0028]
Therefore, according to the second embodiment, when it is necessary to lay additional cables with respect to the existing cables due to subsequent increase in demand or the like, the outer periphery of the main cable buried pipe 3 in the laid state It dealt with by attaching the sub-cables buried pipe 5 from can be improved. At this time, the main cable buried pipe does not need to be moved, so that the workability is excellent. In addition, since a plurality of accommodating partition chambers 9 can be formed on the outer periphery of the main cable embedded pipe without creating a dead space on the outer periphery of the main cable embedded pipe 3, additional cables interfere with existing cables. It becomes possible to accommodate efficiently and easily. In addition , since the main and sub are integrated into a single buried pipe, manholes such as manholes and handholes can be installed in the same manner as in the past, so there is no possibility of increasing the installation cost.
[0029]
【The invention's effect】
As described above, according to the first aspect of the present invention, the sub-cable buried pipe can be detachably attached from the outer circumference of the buried pipe along the longitudinal direction with respect to the main cable buried pipe. Since there is no need to move a certain main cable buried pipe, it is excellent in workability and can quickly respond to the addition of a cable. In addition, since the main and sub are integrated into a single underground pipe, there is no need to increase the number of attachment points in manholes such as manholes and handholes, and there is no risk of increased costs.
[0033]
According to the second aspect of the present invention, it is possible to efficiently accommodate the narrow-diameter cables in each of the accommodating partition chambers in a state of being divided without interfering with each other. In addition, the occupied sectional area occupied by the whole can be kept small.
[Brief description of the drawings]
FIG. 1 is a schematic cutting explanatory view showing a first embodiment of a cable underground pipe according to the present invention.
FIG. 2 is a schematic cutting explanatory view showing a second embodiment.
FIG. 3 is a schematic cutting explanatory view showing a second embodiment in a state where a sub-cable buried pipe is forcibly opened to the left and right.
FIG. 4 is a schematic cut explanatory view showing another modification example in which the sub-cable buried pipe is opened halfway with the hinge as a fulcrum.
FIG. 5 is a schematic explanatory view showing a conventional cable laying state.
[Explanation of symbols]
1 underground cable pipe 3 main cable embedded pipe 5 sub cable embedded pipe 9 storage compartment

Claims (2)

Consists of a circular cross section of the main cable buried pipes and main cable buried pipe section annular sub cable buried pipe which inside is formed in a plurality of housing compartments provided on the outer periphery of the longitudinal direction in the sub-cable buried pipe An underground cable pipe for cable, which is provided with a cut and is detachably attached from the outer periphery of the buried pipe along the longitudinal direction to the main cable buried pipe through the cut .   2. The underground cable underground pipe according to claim 1, wherein each of the storage partition chambers of the sub-cable embedded pipe is formed to have a cross-sectional area smaller than that of the main cable embedded pipe.

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