JP2987326B2 - Wire joint groove - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement for efficiently forming a section divided by a partition in an electric wire common groove for underground wiring of a telephone line, a power cable and other cables related to electric equipment.

[0002]

2. Description of the Related Art An electric wire joint groove is a wiring means which can maintain an outdoor scenery and is excellent in weather resistance, unlike wiring by electric poles. In particular, in recent years, it has been attracting attention as a means of laying optical fibers for use in a wide area network found on the Internet, and is also an infrastructure expected to spread. For this reason, Japanese Patent Application No. Hei 7-273982 proposes an electric wire joint groove that increases the degree of freedom of the wiring route and provides a countermeasure against earthquakes as a buried structure. As a result, it has become possible to freely and safely wire telephone lines, power cables, and cables related to other electrical equipment underground.

[0003]

In the electric wire common groove, the inside of the buried groove is divided by a metal partition to form a plurality of sections, and different types of cables are inserted into each section, thereby increasing the volume efficiency. I try to raise it. If each section is relatively large, the number of partitions required to form the section is small, and it is easy to fix the side edges of each section to the buried groove by welding, but this is required. When the number of sections is increased, the labor for fixing the partitions becomes enormous, and when each section is reduced, welding for fixing the partitions inside the buried groove becomes difficult.

The electric wire joint groove is attractive for realizing underground wiring as an alternative to the conventional aerial wiring, and the greatest advantage is that various cables can be efficiently embedded and integrated underground. However, the problems associated with the formation of the compartments result in high costs for the buried trenches, which hinders its appeal and advantages. Therefore, we decided to arrange partitions as simply and as cost-effectively as possible, and to study to form sections of various sizes.

[0005]

SUMMARY OF THE INVENTION As a result of the study, an electric wire joint groove constructed by connecting buried grooves made of a metal pipe is described.
And, each large compartment divided internally or metallic partitions the provided inside of that, this also more synthetic resin inner tube having one or more small sections at square (hereinafter, abbreviated as the inner tube) Are the electric wire joint grooves respectively fitted. The metal partition only needs to form a large section into which the inner pipe is to be fitted, and only a small number needs to be provided in the buried groove, so that the amount of work is small, and the manufacturing cost as a common wire groove can be reduced accordingly. . In addition, since the inner tube can be formed integrally with the small sections, no labor is required, and the size and the number of the small sections are free, so that the degree of freedom in forming the sections is increased.

A plurality of types of inner pipes having different sizes, which are common divisors of the vertical and horizontal sections of the large section into which the vertical or horizontal cross section fits, are prepared. Even if the large partitions are enlarged by omitting or reducing the number of metal partitions, a large number of small partitions having different sizes and shapes can be formed, and the formation of the small partitions becomes much more free. In addition, when the vertical or horizontal common divisor of the large section into which the inner pipe is inserted vertically or horizontally is used, depending on the combination, there is no need for positioning, and a plurality of types of inner pipes can be inserted into the large section without gaps. Since the outer surface of each inner tube is in close contact with the inner surface of the buried groove or the outer surface of another inner tube and supports each other, the shape of the small section of the inner tube is protected, and the safety of the inserted cable is enhanced. become.

[0007] For example, among four types, the width is the same as the width of the large section and the length is the same, but the length is different from 1/2, 1/3, 1/4, 1/6 of the length of the large section. When tubes A, B, C, and D are prepared, only C may be stacked in four layers, or the combination may be freely selected, such as combining with A, B, and D, or laminating B and D two by two. is there. In addition, even if the inner pipe has the same A size,
In addition to the basic type A having two small sections, A 'having three sections in the horizontal direction, and A "having two small sections in the vertical and horizontal directions
Therefore, the degree of freedom of the combination of the inner tubes is further expanded. The length of the inner pipe is preferably the same as the length of the buried groove.

In addition, since the inner tube used in the present invention is made of a synthetic resin, it does not generate rust and is excellent in corrosion resistance and the like. Further, since the high-voltage power cable inserted into the small section does not directly contact the metal pipe or the metal partition forming the large section, generation of heat can be suppressed, and the inner pipe can be used as a cushioning material against external force. It functions as

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a substantially square cross section.
FIG. 2 is a perspective view of a buried groove 2 configured by fitting three types of rectangular inner tubes A, B, and C into a rectangular metal tube 1. Although not shown, the electric wire joint groove is formed by connecting an open type buried groove, a branch buried groove, and the like with bolts and the like, in addition to the closed type buried groove 2. The embedding groove 2 of this example is formed by horizontally dividing the metal partition 4 into the embedding groove 2 so as to form large sections 3 and 3 (see the thick broken line frame in FIG. 2 or FIG. 3) having the same cross-sectional shape as the upper and lower stages. The inner pipes A and B are fitted into the upper large section 3 and the inner pipe C is fitted into the lower large section 3.

The illustrated inner tubes A, B, and C are all the same length in the horizontal direction as the cross-sectional width direction of the buried groove 2, and the length of A is 1/6 of the cross-sectional vertical direction of the buried groove 2 and the length of B is the same. 1/3 of the vertical direction and the vertical of C are different from 1/2 of the vertical direction, and the inner tube A is divided into 5 equal parts in the horizontal direction.
The inner pipe B has small sections 5 divided into three in the horizontal direction, and the inner pipe C has two divided sections 5 in the horizontal direction. In FIG. 1, they are inserted in the buried groove 2 in the horizontal direction, but may be inserted in the vertical direction, or if the shape of the large section allows,
Vertical and horizontal orientations may be mixed and fitted. Thus, the arrangement direction of the small sections 5 can be easily changed only by changing the directions of the inner tubes A, B, and C.

FIG. 2 is a perspective view showing a relationship in which each of the inner tubes A, B, and C is fitted into the buried groove 2. As shown in FIG. The vertical section of inner tube A is large section 3
1/6 of the length of the inner tube B is 1/3 of the large section 3, so the inner tube A
Of the lower surface and the upper surface of the inner tube B, and while close the other of the outer surface to the inner surface of the large compartment can be fitted into the large compartments superposed both, to no need for positioning at the time of fitting, mutual support Thus, the shape of the small section 5 is maintained. In addition, the inner pipe C is almost the same size as the large section, so that the outer surface can be fitted in close contact with the inner surface of the large section 3, positioning is unnecessary similarly to the above, and the small section 5 is held in the large section. Become. In addition, of course, it is inserted into the buried groove 2 of the square metal pipe.
Dimensions to ensure the appropriate clearance required for the square inner tube to pass through
Is set to

3 to 5 are end views of the buried groove 2 showing an example in which the inner tubes A, B and C are combined. FIG. 3 shows a combination corresponding to FIG. B is alternately stacked, and FIG. 5 shows a configuration in which one inner tube A is placed above and two inner tubes A are placed below an inner tube C. In the example of FIG. 5, a metal partition is used. The entire inside of the buried groove 2 is omitted to be a large section 3. As described above, various combinations can be considered with only the inner tubes A, B, and C shown in the present example. If inner tubes having different sizes, shapes, division numbers of small sections, and the like are prepared, the combination is Countless. If the formation of such a small section is to be realized only by a conventional metal partition, it takes a lot of trouble, and if the small section becomes small, it becomes practically impossible. The present invention can easily and inexpensively form such a large number of small sections.

Further, an example of the formation of a small section will be described.
FIG. 6 shows that four large sections 3 (see the thick broken line in FIG. 6) are formed by providing a cross-shaped metal partition 7 in a metal pipe 6 having a cross section twice as long as the above example. FIG. 2 is an end view of a buried groove 2 showing an example in which small sections 5 are formed by arbitrarily combining inner tubes A, B, and C. As shown in FIG. 6, the effect of forming the small sections using the inner tube of the present invention is so high that the number of the small sections 5 is increased, and the shapes of the small sections 5 are different and the arrangement is also different. Become. The inner tubes A, B and C made of synthetic resin are
Although a large number of small sections 5 can be integrally formed in a freely arranged configuration, for example, inner pipes corresponding to each of the large sections 3 shown in FIG. 6 (for example, inner pipes A, B, and C in a thick broken line). Since the diversion becomes difficult when integrally molded, as shown in this example, the inner pipes A, B, and C having a cross-sectional shape extending in one direction in which the vertical or horizontal is a common divisor of the vertical or horizontal of the large section are individually formed. It is preferable to manufacture it.

[0014]

According to the electric wire joint groove of the present invention, it is easy to manufacture a buried groove which forms a large number of small sections having different sizes and shapes, and it is possible to greatly reduce the manufacturing labor and cost. Rather, the degree of freedom in the composition of small parcels is born,
It is possible to construct a common wire groove according to the specifications of the wiring route.

Further, when viewed from the cable to be inserted, rust does not occur and the surroundings are protected by the inner pipe having excellent corrosion resistance. Furthermore, since the heat generated by the high-voltage power cable can be suppressed and the inner tube acts as a buffer against external forces,
The cable becomes more protected. As described above, in the electric wire joint groove of the present invention, the use of the inner pipe can provide a great improvement effect in terms of manufacturing and operation.

[Brief description of the drawings]

FIG. 1 is a perspective view of a buried groove formed by fitting three types of inner tubes into a metal tube having a substantially square cross section.

FIG. 2 is a perspective view showing a relationship in which each of the inner tubes A, B, and C is fitted into a buried groove.

FIG. 3 is an end view of a buried groove in a configuration in which inner pipes A, B, and C are combined as in FIG.

FIG. 4 is an end view of a buried groove in a configuration in which inner tubes A and B are alternately stacked and combined.

FIG. 5: One inner tube A at the top, two inner tubes A at the bottom, inner tube C
FIG. 4 is an end view of a buried groove in a configuration sandwiching.

FIG. 6 is an end view of a buried groove in which a metal pipe is provided with a cross-shaped metal partition to form four large sections, and each of the inner pipes A, B, and C is arbitrarily combined to form a small section; It is.

[Explanation of symbols]

 Reference Signs List 1 metal pipe 2 buried groove 3 large section 4 metal partition 5 small section 6 metal pipe with double length and width 7 cross-shaped metal partition A inner pipe having 5 small sections B having 3 small sections Inner tube C Inner tube with two small compartments

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) H02G 9/00-9/12

Claims (1)

(57) [Claims] 1. An electric wire joint groove constructed by connecting buried grooves made of a metal pipe, wherein the buried groove is connected to a square metal pipe.
And, each large compartment divided by a metal partition provided inside or the interior of that, it in one or more of the synthetic resin inner tube of rectangular having a small section fitted respectively, the synthetic resin inner tube
The vertical or horizontal public section of the large section into which the vertical or horizontal section fits.
There are several types with different sizes that are divisors, each synthetic resin
An electric wire joint groove characterized by being fitted into a large section by combining internal pipes .