JPH0956032A - Combination structure of u-duct for underground wiring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a combination structure of a U-duct, i.e. a block for burying optical fiber cables and wires under the ground, which can be used at any site and can easily deal with the increase of wires to be buried. SOLUTION: Board-like U-ducts 1, 1,... having a plurality of U-grooves in the longitudinal direction are arranged over a trench dug into the ground and wires and cables are contained in the U-groove. When a large quantity of wires are buried, another U-duct 1 is stacked on one U-duct 1 and an upper cover 7 is placed on the upper U-duct 1. The upper cover 7 is then fastened to the lowermost U-duct 1 by means of bolts 10 and adjacent U-ducts 1 are also coupled by means of bolts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combined structure of U-shaped conduits buried in the ground for electric wiring.

[0002]

2. Description of the Related Art It is said that by the year 2000, households located in major areas of the prefectural office will be laid, and by 2010, light fiber networks will be laid in all households. When such an optical fiber cable is erected on a utility pole standing on the side of a road like a conventional electric wire, there is a problem that the road becomes narrow and it is difficult to walk, and in the event of an earthquake, it falls. On the other hand, the electric wires stretched alongside the road hurt the scenery of the town.

Therefore, in recent years, in many cases, a block is buried in the ground and electric wiring is provided in the block. By wiring underground, electric wires will not be stretched around the streets, the poles will not fall, and there is no risk of electric shock from touching the electric wires. FIG. 4 shows a specific example of the block, and such a block is arranged and buried in a trench excavated on the ground. The box has multiple through holes
(A), (a) ... are formed, and wires and cables are routed through these through-holes (a), (a) ..., and metal fittings (b) are screwed between the blocks. Connect adjacent blocks.

By the way, a through hole having a predetermined size is formed in the block, and each electric wire or cable is inserted into each through hole. The number and size of holes are defined. That is, it is a dedicated block that cannot be used at other sites, and when the amount of wiring to be buried increases, this type of block cannot deal with it.

[0005]

As described above, the block having the through holes has the above-mentioned problems. The problem to be solved by the present invention is this problem, and it can be used at any site and can be easily dealt with even when the amount of buried electric wires increases. A combined structure of mold lines is provided.

[0006]

SUMMARY OF THE INVENTION The present invention is for wiring using a U-shaped conduit, which is a U-shaped pipe on the upper surface of a plate-shaped block having a predetermined width and length. A plurality of grooved grooves are formed in the longitudinal direction. Therefore, the electric wire or cable is accommodated in this U groove, and the upper lid is covered. Although the U-shaped conduits are arranged in the longitudinal direction, waterproof rubber is attached to both end surfaces, and waterproof rubber is also attached to upper end surfaces of both side pieces. Similarly, waterproof rubber is provided on both end surfaces of the upper lid.

[0007] Here, the above U-shaped conduits can be stacked upward, and the same can be applied when electric wires or cables cannot be accommodated in the U-shaped groove formed in one U-shaped conduit. The U-shaped conduit is placed on top to form two layers. It can be placed further on top to form three layers. An upper lid is coated on the uppermost U-shaped conduit, and fittings are attached to the upper lid and the lowermost U-shaped conduit. The upper lid and the U-shaped conduit are tightened by bolts between the both fittings. To fix. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0008]

1 is a specific example showing a U-shaped conduit 1. As is apparent from the figure, this U-shaped conduit 1 is a plate-shaped block body, and a plurality of U-shaped grooves 2, 2, ... Are formed on the upper surface in the longitudinal direction at regular intervals. ing. Then, a step is provided on the upper end surfaces 4 and 4 of the both side pieces 3 and 3 to form the water blocking rubber 5
Is also attached, and similarly, water-stopping rubber 5 is attached to both end surfaces 6 by forming a step. Here, the groove shape is U-shaped, but it is not necessarily limited to U-shaped, and may be a semicircle or sometimes a quadrangle.

FIG. 2 shows a case in which the U-shaped conduits 1 and 1 are stacked in two layers, an upper lid 7 is attached to the upper U-shaped conduit 1. Four U-shaped grooves 2 in one U-shaped conduit,
2 ... are formed, but by stacking them in two stages, a total of eight U-shaped grooves 2, 2, ... Are formed, and the number of U-shaped conduits 1, 1, ... Is adjusted according to the amount of electric wires and cables to be accommodated. You can do it. In this case, the upper lid 7 is not required because the upper lid 7 is covered by the upper U-shaped conduit 1 and another U-shaped conduit 1 is placed on the lower U-shaped conduit 1.

Since the water blocking rubbers 5 and 5 are attached to both side pieces 3 and the upper end of the U-shaped conduit 1, the upper and lower U-shaped conduits 1,
There is no gap between the upper U-shaped conduit 1 and the upper lid 7, and no gap is left between them. A metal fitting 8 is attached to the upper lid 7 and extends downward, and another metal fitting 9 is fixed to the lower U-shaped conduit 1. A bolt 10 is placed between these metal fittings 8 and 9.
Is attached, and the upper lid 7 cannot be removed by tightening the nut.

FIG. 3 shows a cross-sectional view and a front view in the case of a two-stage structure. The metal fittings 8, 8, ..., 9, 9 ... Are attached in places to fix the upper lid 7 and The U-shaped conduit 1 placed on the upper stage is arranged without being displaced. The U-shaped conduits 1, 1, ... Are connected continuously in the longitudinal direction thereof, and the adjacent U-shaped conduits 1 are connected.
A connecting fitting for connecting a and 1b is used. U
L-shaped metal fittings 11 having holes are fixed to both end portions of the side surface of the mold conduit, and bolts are hooked on these metal fittings and screwed.

Since the waterproof rubber 5 is attached to the end surface 6 of the U-shaped conduit 1 and the end surface of the upper lid 7, there is no gap between the U-shaped conduits 1 and 1 connected to each other, and the rainwater Never intruded into. By the way, in this embodiment, the case of stacking in upper and lower two stages has been described. However, if the amount of electric wires or cables to be accommodated is small, it may be a single stage U-shaped conduit. Can be stacked in columns. As described above, the combined structure of the U-shaped conduits of the present invention allows the U-shaped conduits to be connected and stacked, and the following effects can be obtained.

[0013]

INDUSTRIAL APPLICABILITY The present invention is to embed an electric wire or a cable in the ground by using a U-shaped conduit, and the U-shaped conduit is a plate-shaped block body, and a U-shaped conduit Grooves are formed in the longitudinal direction. Electric wires and cables will be accommodated in this U-shaped groove, but since U-shaped conduits can be stacked according to the amount of electric wires to be accommodated, it is a versatile conduit that can be applied to any site. Become.

Since the waterproof rubber is adhered to both upper ends and both end surfaces of the U-shaped conduit, the waterproof rubber is also attached to both end surfaces of the upper lid as a cover. ,
Rainwater does not enter the U-shaped pipelines that are stacked and installed, and the stored wires and cables can be safely protected. Then, the stacked U-shaped conduits and the upper lid are tightened with bolts so that they are stable without rattling, that is, they do not collapse even if an earthquake or the like occurs, and bolts are also used between U-shaped conduits that are also adjacently connected. Be tightened.

[Brief description of drawings]

FIG. 1 is a specific example of a U-shaped conduit according to the present invention.

FIG. 2 shows a case where U-shaped pipelines are stacked in two stages.

FIG. 3 shows a case where two U-shaped pipe lines are connected.

FIG. 4 is a conventional block having through holes formed therein.

[Explanation of symbols]

 1 U-type pipeline 2 Groove 3 Side piece 4 Upper end surface 5 Water-stop rubber 6 End surface 7 Top lid 8 Metal fitting 9 Metal fitting 10 Bolt 11 L-shaped metal fitting

Claims (2)

[Claims] 1. A ground excavating groove for arranging a block in the groove and accommodating an electric wire or a cable in the block. A plurality of U-shaped grooves are formed on the upper surface as the block in the longitudinal direction. Using the plate-shaped block formed in
The U-shaped groove accommodates the above-mentioned electric wires and cables, and water-proof rubber is attached to the upper ends and both end faces of both side pieces, and a water-stop rubber is attached to both end faces on this U-shaped conduit. Place the bracket on the upper lid and the bracket fixed to the U-shaped conduit with bolts, and arrange the U-shaped conduit in the longitudinal direction and connect adjacent U-shaped conduits with bolts. A combined structure of U-shaped conduits for underground wiring characterized by the above. 2. A groove is formed by excavating the ground, a block is arranged in the groove, and an electric wire or a cable is accommodated in the block. A plurality of U-shaped grooves are formed on the upper surface of the block as a longitudinal direction. Using the plate-shaped block formed in
The electric wire or cable is accommodated in the U-shaped groove, and a waterproof rubber is attached to the upper ends and both end surfaces of both side pieces, and another U-shaped conduit is placed on the U-shaped conduit and stacked. Furthermore, place an upper lid with waterproof rubber attached on both end faces on the U-shaped conduit, and tighten the metal fittings attached to the upper lid and the metal fittings fixed to the U-shaped conduit at the bottom stage with bolts. A combined structure of U-shaped pipelines for underground wiring, characterized in that the channels are arranged in the longitudinal direction and adjacent U-shaped pipelines are connected by bolts.