JPH09215163A - Pipe for wire-laying and pipe aggregate for common duct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lay a desired number of cables by using their respective pipes for wire-laying by vertically and horizontally arranging the pipes for wire-laying in connectable states. SOLUTION: A pipe A for wire-laying has a electric wire passing hole 2 which is formed through a square-pole like molded synthetic resin body 1 along the center axis of the body 1 in the length direction and projecting strips 41 and recessed strips 42 having such shapes that can be put on the strips 41 extended in the length direction on the side faces of the body 1. A pipe aggregate B for common duct is formed by connecting different pipes A for wire- laying to each other by putting the projecting strips 41 in the recessed strips 42.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe for electric installation and a pipe assembly for electric wire common groove used in the electric wire common groove.

[0002]

2. Description of the Related Art In recent years, in order to enhance the scenery of the road and ensure smooth road traffic, it is urgently necessary to prepare a common electric wire groove (C.C.BOX) for burying electric wires and communication lines in the underground of roads and sidewalks. It is peeling.

For the construction of such an electric wire common groove, generally, FIG.
A perforated tube 100 as shown in is used. The perforated tube 100 is a square columnar ceramic tube having a plurality of insertion holes 101 through which electric wires are passed and a central screw rod insertion hole 102. This perforated pipe 100 is buried underground, and an electric wire, a communication line, or the like is passed through the insertion hole 101 of the perforated pipe 100 thus buried.

[0004]

However, the above-mentioned square columnar ceramic perforated tube 100, which is heavy in weight, is not easy to carry and lacks handleability during construction, and is liable to be broken or cracked during handling. There was a problem.

The perforated pipe 100 has an insertion hole 101.
Since the number (4 in Fig. 5) and the diameter are fixed, it is necessary to prepare a perforated pipe with insertion holes of the number and diameter corresponding to the thickness and number of the electric wires to be laid. There was an inconvenience.

The present invention has been made to solve the above problems, and is not only lightweight and excellent in handleability, but can also be used in an appropriate combination in accordance with the number and thickness of electric wires to be laid. The purpose is to provide.

Further, the present invention is useful for eliminating the influence of the electromagnetic interference generated from weak electric wires such as telecommunication lines and CATV lines when they are collectively laid in a common groove. An object is to provide a pipe assembly for electric wire common groove.

[0008]

A pipe for electrical installation according to the present invention is a rectangular columnar synthetic resin molded body provided with an insertion hole for penetrating an electric wire in the longitudinal direction. On at least two of the two outer surfaces,
A ridge extending in the longitudinal direction and a ridge having a shape that can be fitted into the ridge are provided separately.

In this structure, a convex strip is provided on each of two adjacent outer surfaces of the synthetic resin molded body, and a concave strip is provided on each of the other two external surfaces adjacent to each other. Can be adopted, and in those cases, it is desirable that a convex line or a concave line is provided in the central portion in the width direction of the outer surface of the synthetic resin molded body.

The ridges are wider toward the protruding end, and the ridges are wider toward the bottom surface of the ridges. It is desirable that the width is smaller than the large part.

In the electric installation pipe thus constructed, two or more electric installation pipes are positioned relative to each other by fitting the projections of the electric installation pipes into the recesses of another electric installation pipe. They can be stacked vertically or arranged side by side horizontally. In addition, since the synthetic resin molded body forming the electric installation pipes has a square pillar shape, wasteful space (dead space) is created between the electric installation pipes that are vertically stacked and between the electric installation pipes that are arranged side by side. Space) is not formed. Therefore, soil will not enter the space after construction and the ground will not sink. The ridges are wider toward the protruding end, and the ridges are wider toward the bottom surface, and the width of the root of the ridge is larger than that of the maximum width of the ridge. Also, in the case of adopting a configuration in which the width is small, the vertically stacked electric installation pipes and the laterally arranged electric installation pipes are connected so as not to separate from each other.

The electric wire common groove pipe assembly according to the present invention comprises a plurality of electric installation pipes having the above-mentioned configuration arranged in parallel, and one of the electric installation pipes is adjacent to the other electric installation pipe. The convex strips of the electric installation pipe and the concave strips of the other electric installation pipe are fitted to each other so that the electric installation pipes are connected to each other.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view of an electric installation pipe A which employs a basic configuration for carrying out the present invention.
In the electric installation pipe A shown in the figure, one insertion hole 2 is formed in the central portion of a long rectangular synthetic resin molded body 1 so as to penetrate the electric wire in the longitudinal direction. Of the four outer side surfaces 31, 32, 33, 34 of the resin molded body 1, the two outer side surfaces 31, 32 adjacent to each other are provided with the ridges 41, 41, respectively, and the other two outer side surfaces adjacent to each other. Recessed lines 42, 42 are provided on each of 33, 34. The ridges 41, 41 and the ridges 42, 42 are located in the respective widthwise central portions of the outer side surfaces 31, 32, 33, 34 on which they are provided. Further, the two convex stripes 41, 41 and the two concave stripes 42, 42 have the same shape.

Here, the concrete shapes of the convex ridges 41 and the concave ridges 42 will be described. The convex ridges 41 become wider toward the protruding side end portion 41a thereof, and the concave ridges 42 have their bottom surfaces 42a.
It becomes wider as it gets closer to. Moreover, the width W1 of the root portion of the convex strip 41 is smaller than the width W2 of the maximum width portion of the concave strip 42. And two electric installation pipes A, A
In the above, when the convex strip 41 of the one electric installation pipe A is slid and fitted in the concave strip 42 of the other electric installation pipe A in the longitudinal direction, the two are fitted to each other without any significant rattling. The pipes A, A are connected so as not to separate from each other. In this case, if the quadrangular shape of the synthetic resin molded body 1 is a square, even if the electric installation pipes A, A are vertically stacked or arranged side by side, any ridge 4
No matter which recessed strip 42, 42 is fitted with 1, 41,
The step does not occur at the connecting portion between the electric pipes A, A.

This electric installation pipe A can be easily extruded from a synthetic resin such as polyvinyl chloride,
The length can be freely selected.

FIG. 1 shows the basic shape of an electric installation pipe A according to the present invention. Therefore, the electric installation pipe included in the present invention can be variously modified based on the shape of the electric installation pipe A in FIG. For example, the ridges 4 are formed only on any two of the four outer surfaces of the rectangular columnar synthetic resin molded body.
1 and the concave ridges 42 may be provided separately, or the convex ridges 41 and the concave ridges 42 may be separately provided on any three surfaces. Further, the formation positions of the ridges 41 and the ridges 42 may be deviated in the width direction of the outer side surface. Further, the size (diameter) or shape of the insertion hole 2 can be changed.

FIG. 2 shows the electric installation pipe A shown in FIG.
The pipe assembly B for electric wire common grooves constructed by this combination is shown. In this structure, the two electric installation pipes A, A stacked in the vertical direction and the two electric installation pipes A, A lined up in the horizontal direction are respectively the ridges 41 of one electric installation pipe A. The other electric installation pipe A is connected so as not to separate by fitting with the recessed line 42. Further, since the synthetic resin molded body 1 of each of the electric installation pipes A is in the shape of a square quadrangular prism, no step is formed at the connecting portion of the electric installation pipes A, A.

FIG. 4 shows a pipe assembly B for the electric wire common groove of FIG.
The figure shows the state of being deployed in the groove 5 formed in the basement of the sidewalk. In the figure, L indicates an electric wire passed through the insertion hole 2 of each electric installation pipe A .... The electric wire L runs after the electric installation pipe A is buried.

FIG. 3 shows a modification of the electric installation pipe A. The electric installation pipe A shown in the figure is provided with cavities 6 at four locations around the insertion hole 2 in the entire longitudinal direction of the synthetic resin molded body 1 in the shape of a quadrangular prism for weight reduction.

In the embodiment described above, one electric installation pipe A is much lighter than the total weight of the electric wire common groove pipe assembly B formed by connecting a plurality of the electric installation pipes A, so that it can be carried easily. It is easy to handle. Therefore, it becomes possible to perform the work of laying the electric wire underground by using the electric wire common groove pipe assembly B with good workability.
It is also possible to increase or decrease the number of the electric installation pipes A and appropriately change the parallel pattern of the electric installation pipes A. Further, if a desired number of electric installation pipes A having insertion holes 2 having different diameters are prepared, and the electric wire common groove pipe aggregate B is assembled by arranging and connecting them in parallel in the vertical and horizontal directions, each electric wire L can be obtained. The electric wire L can be appropriately laid using the insertion hole 2 having a suitable diameter.

[0021]

According to the present invention, since the electric installation pipe is made of synthetic resin, it is light in weight and excellent in handleability as compared with the conventional ceramic porous pipe, but it has an advantage that it is less likely to be damaged or broken. . Further, when two or more electric installation pipes are arranged side by side in the longitudinal direction or the horizontal direction, no unnecessary space is formed between the electric installation pipes, so the electric installation pipes are used. It is advantageous in terms of space when burying the pipe assembly for electric wire common groove underground. Also,
The electric installation pipes are connected so as not to separate from each other by fitting the convex stripes and the concave stripes provided therein, so that the electric wires can be easily laid.

Further, the pipe for electric installation of the present invention has an advantage that it can be easily continuously extruded from synthetic resin. In addition, the electric wire common groove pipe assembly according to the present invention can be assembled so as to have an arbitrary number of insertion holes by using a plurality of electric installation pipes having insertion holes of the same diameter, and of course different diameters. Since it is possible to assemble the electric installation pipe having the insertion holes so as to have an arbitrary number of insertion holes, it is possible to deal with the thickness and the number of the electric wires without waste.

[Brief description of drawings]

FIG. 1 is a perspective view of an electric installation pipe adopting a basic configuration for carrying out the present invention.

FIG. 2 is a perspective view of an electric wire common groove pipe assembly.

FIG. 3 is a perspective view of an electric installation pipe according to a modification.

FIG. 4 is a cross-sectional view of a case where the electric wire common groove pipe assembly of FIG. 2 is arranged in a groove.

FIG. 5 is a perspective view of a conventional example.

[Explanation of symbols]

 A Electric installation pipe B Electric wire common groove pipe assembly L Electric wire 1 Synthetic resin molded body 2 Insertion hole 31, 32, 33, 34 Outer surface of synthetic resin molded body 41 Convex line 42 Concave line W1 Width of root part of convex line W2 The width of the maximum width of the recess

Claims (5)

[Claims] 1. A quadrangular prism-shaped synthetic resin molded body provided with an insertion hole penetrating in the longitudinal direction for passing an electric wire, and at least two outer side surfaces of the four outer side surfaces of the synthetic resin molded body, A pipe for electrical installation, characterized in that a ridge extending in the longitudinal direction and a ridge having a shape fittable to the ridge are provided separately. 2. The synthetic resin molded product according to claim 1, wherein a convex strip is provided on each of two adjacent outer surfaces of the synthetic resin molded body, and a concave strip is provided on each of two other external surfaces of the synthetic resin molded body. Pipe for electric installation. 3. The pipe for electrical installation according to claim 1, wherein a convex line or a concave line is provided at a central portion in the width direction of the outer side surface of the synthetic resin molded body. 4. The ridge is wider as it approaches the end of the protruding side, and the ridge is wider as it approaches the bottom surface of the ridge, and the width of the root portion of the ridge is greater than that of the ridge. The electric installation pipe according to any one of claims 1, 2, and 3, which has a width smaller than that of a large portion. 5. A plurality of electric installation pipes according to claim 4 are arranged in parallel, and between two adjacent electric installation pipes, a ridge of one electric installation pipe and another electric installation pipe are provided. Pipe assembly for electric wire common groove, characterized in that the recessed strips are fitted to each other and the pipes for electric installation are connected to each other.