JP2801567B2 - Connection structure of 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 a joint structure of an electric wire joint groove, and more particularly to a joint structure in a case where a wire joint groove made of precast concrete is bypassed or buried underground with a step. is there.

[0002]

2. Description of the Related Art In order to eliminate the obscureness of electric wires such as power lines, telephone lines, and the like, which are stretched over the city, etc., environmental beautification movements for burying these together in the ground have prospered. A trench was cut in the road, and an electric wire joint trench was formed in the trench by cast-in-place concrete.

[0003] However, the preparation of the electric wire joint ditch using cast-in-place concrete involves transporting a plurality of pre-cast concrete blocks produced in advance to the site and transporting them to the site because the construction period is long and hinders traffic. It can be said that it is faster to create a common ditch by continuous construction.

[0004] By the way, when the common wire groove is formed by a precast concrete block, it may be necessary to detour around various places or to lay it with steps. In such a case, it is conventionally impossible to prepare a block made of precast concrete in advance because the detour portion and the step portion are based on the specificity of the site. Is formed, or a ready-made block is partially cut out and used.

[0005]

However, forming a detour or a step block with cast-in-place concrete undesirably prolongs the construction period and increases the construction cost.

Accordingly, the present invention provides a connection structure for a common wire groove in which a common wire groove having a detour or a step can be formed easily, quickly, and easily.

[0007]

According to the present invention, there is provided a connecting portion structure of an electric wire common groove, wherein one or a plurality of connecting blocks made of precast concrete in which a plurality of flexible pipes are embedded are attached to both ends of the flexible pipe. The parts are exposed so as to be connectable to each other.

Further, at both ends of one or a plurality of connection blocks made of precast concrete in which a plurality of flexible pipes are buried, both ends of the flexible pipe are exposed at predetermined lengths, and sockets are provided at the ends. It is characterized by having been provided.

The flexible pipe is characterized in that the inner and outer surfaces of a steel pipe having a corrugated cross section are coated with a heat-resistant and corrosion-resistant synthetic resin.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a plurality of flexible pipes 2
Are penetrated, and both ends of the flexible pipe are exposed at a predetermined length. The space bar 3 is exposed between the connection blocks 1. The space bar 3 is a reinforcing bar for reinforced concrete that connects the three connection blocks 1, and one space bar 3 is arranged at the center of each side of the rectangular parallelepiped connection block 1. The exposed space bar 3 can be cut and removed by a metal saw or the like as necessary.

The flexible pipe 2 has a corrugated steel pipe formed into a corrugated cross section or a rubber pipe mixed with a synthetic resin or glass fiber, and the inner and outer surfaces of the pipe are coated with a synthetic resin having corrosion resistance and heat resistance. , It is easy to draw in electric wires, has a low coefficient of friction, is excellent in corrosion resistance and heat resistance, and is suitable for detours and steps due to its flexibility.
It is excellent in earthquake resistance because it is flexible. The flexible pipe 2 is inserted, for example, into a hole 9 formed by punching a knockout portion 8 provided in a branch block 7 on site.

The space bar 3 integrates the three connection blocks 1 collectively, and is buried in the three connection blocks 1 in a plurality corresponding to each side like the flexible pipe 2.
The three blocks can be separated as needed, if necessary. That is, the space bar 3 is 3
The purpose of this is to make it easy to handle two blocks as one when transporting.

Referring to FIG. 2, a second embodiment of the present invention will be described. In this example, a socket 4 is connected to ends of a flexible pipe 2 exposed at both ends of a connection block 1a having a predetermined length. ing. Socket 4 is connection block 1
a plate-shaped body made of concrete having the same cross-sectional area as a,
A hole 5 to which the flexible pipe 2 is fixed on the inner peripheral surface is opened. This socket 3 is, for example, a branch block 7
Can be fitted and fixed in the opening 10 provided in the opening.

Therefore, when it is necessary to form a detour or a step in the wire common groove, the connection pipe structure is used to bend the flexible pipe 2 in an appropriate direction to form a detour or a step. For example, in the first embodiment, as shown in FIG.
Connection block 1 on the bending direction side between 2, 12a
The space bar 3 between them is cut off at each site, the remaining space bar 3 is deformed, the three connection blocks 1 are arranged in a curved manner, and the same connection structure is added to form a detour 13, or FIG. As shown in FIG.

In the second embodiment, as shown in FIG. 5, a connection block 1a is arranged on the soft ground 9 between the electric wire common grooves 12, 12a, and is used as a measure against uneven settlement by the flexible pipe 2. Therefore, even if the soft ground 9 sinks, the flexible pipe 2 bends to cope with the settlement, so that an emergency measure can be taken without cutting the electric wire.

[0016]

According to the present invention described above, the flexible pipe can be freely bent and deformed, and any curvature can be formed according to the site. And it can be easily formed. In addition, the flexible pipe has excellent flexibility and elasticity, so it has excellent seismic resistance.In addition, the connection block has excellent flexibility due to the presence of the flexible pipe. Can hold.

Further, since the connection block is a rectangular parallelepiped in which the flexible pipe is embedded, the connection block acts as a protection member for the flexible pipe, and the burying depth of the flexible pipe alone must be increased in consideration of pressure resistance. By covering with a connection block, it has pressure resistance and can be embedded in a shallow part.

Further, since the connection block is a rectangular parallelepiped in which the flexible pipe is embedded, the sides and surfaces can be aligned when the common groove is embedded in a straight line, which is convenient for the alignment work.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing a second embodiment of the present invention.

FIG. 3 is a plan view showing an application example of the present invention.

FIG. 4 is a sectional view showing an application example of the present invention.

FIG. 5 is a sectional view showing an application example of the present invention.

[Explanation of symbols]

 1, 1a: Connection block 2: Flexible pipe 3: Space bar 4: Socket

Claims (5)

(57) [Claims] 1. An electric wire joint, wherein both ends of the flexible pipe are exposed to be connectable to both ends of one or more connection blocks made of precast concrete in which a plurality of flexible pipes are embedded. Groove connection structure. 2. At both ends of one or a plurality of connection blocks made of precast concrete in which a plurality of flexible pipes are embedded, both ends of the flexible pipe are exposed at predetermined lengths, and sockets are provided at the ends. The joint structure of the electric wire common groove, which is provided. 3. The joint structure according to claim 1, wherein the flexible pipe is made of a composite material in which the inner and outer surfaces of the pipe having a corrugated cross section are coated with a heat-resistant and corrosion-resistant synthetic resin. 4. The connection structure for a common wire groove according to claim 1, wherein a space bar is interposed between the plurality of connection blocks. 5. The connecting part structure of a wire common groove according to claim 1, wherein the connecting block is a rectangular parallelepiped.