JPH10136543A - Wire burying underground multi-purpose duct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve further the efficiency of an installation process in which factory-made underground multi-purpose duct blocks by which a shortest lead time at the installation site of an underground multi-purpose duct by which wires which are installed above the ground and distributed to respective houses and facilities along the route are buried is obtained are transported and installed and to reduce the cost and the lead time for burying installation. SOLUTION: Lead pipe locks 2 and 2 in which a plurality of pipes 4 and 4 are laid in parallel with each other with intervals and a branching block 3 which has the pipes 4 and 4 corresponding to the pipes 4 and 4 of the lead pipe block 2 and by which the pipes 4 and 4 are linked with the outside are connected to each other to form a continuous unit which is molded with concrete 7 to produce an underground multi-purpose duct structural unit 1. The duct structural unit 1 is once cut 8 in directions crossing the longitudinal underground multi-purpose direction. The cut parts 8 and 8 are joined with each other again to form the underground multi-purpose duct structural unit 1 and the structural units 1 are successively joined and buried.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a common groove for jointly burying various kinds of electric wires such as electric wires, telephone lines, optical fiber information lines, and cable broadcasting lines laid on the ground. The present invention relates to a small common ditches that are buried in a shallow stratum corresponding to the upper layer of existing gas pipes, water pipes, sewage pipes, etc., house and lay these wires, and deliver them to doors along the road.

[0002]

2. Description of the Related Art Conventionally, as a common groove of this kind, a plurality of pipes extending in a longitudinal direction are formed in a groove at predetermined intervals in a direction parallel to each other in order to separately house and embed various electric wires. However, it is necessary to use a high degree of draw-drawing technology, which results in high costs. Is impossible.

[0003] In order to solve this problem, the applicant of the present invention has attempted a common groove for concrete molding using a plurality of pipes. That is, at a site or a factory, a plurality of pipes are arranged side by side in parallel with each other in the longitudinal direction at intervals in parallel with each other, and a conduit block and a branch block formed of concrete with reinforcing bars are sequentially connected in the longitudinal direction to jointly. Grooves are buried, necessary wires are housed and laid in pipes connected in series, and the required wires are introduced into each facility along the roadside and each door of the building through the pipe leading to the outside of the branch block. It is to be offered to.

[0004] A common groove forming part for arranging a plurality of pipes for concrete molding is excellent in heavy weight resistance, small space and flexibility, and is a block unit. It is suitable for the conditions of underground burial of these electric wires in a small space narrowed by existing burial facilities in that the burial position can be easily separated and directly drawn in, and the burial position can be easily confirmed.

[0005] Concerning a common groove formed by appropriately arranging and connecting conduit blocks and branch blocks constituting the common groove, a method of transporting each block molded in a factory to a burying site and connecting and burying the same is costly. In the case of urgent burial work such as restoration work due to a disaster, the time required for construction work, especially the construction period at the burial site, is shortened.
It is said that it is more advantageous than a joint ditch made by casting concrete in place.

[0006]

However, each block molded at the factory has a length of at most about 4 to 5 m, so that the joints of each block on the site are many and at the same time, concrete moldings are required. Because of this, the weight is too large to be easily transported and handled to the site, and there is still a problem in terms of cost and construction period.

[0007] Further, even in a common groove formed by connecting a conduit block and a branch block formed at a factory, since each block is molded separately in a connection process at a burial site, each pipe body is connected between blocks. The work of butting and aligning all ends of each other and connecting them is very complicated and time-consuming, and in addition, it takes a long time, such as arranging reinforcing bars at the connecting parts and stiffening with concrete, further increasing the cost. The inconvenience of partially closing the road at the burial site has forced long-term inconvenience.

An object of the present invention is to solve these problems, minimize the cost and construction period required for burying the common groove, and realize an efficient and heavy-duty electric wire burying work.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a plurality of straight pipes or flexible pipes made of any material such as vinyl chloride and metal in a direction parallel to each other along a longitudinal direction. A pipe block composed of a group of pipes arranged in parallel with reinforcing bars arranged at intervals and a plurality of pipes made of the same material as the pipes of the pipe block are arranged in parallel with reinforcing bars. A branch block formed by connecting a part of pipes of a group of pipes to the outside is formed in a common groove formed of a series of concrete molded over the entire length and connected and buried. Characterized in that a block or a common groove forming part of a predetermined length formed by integrally molding both blocks is cut and divided so as to cross the longitudinal direction, and the cut surfaces are joined in an aligned manner, for burying electric wires. Suggest a joint ditch.

[0010] Each of the common groove components integrally molded to a predetermined length is cut short and divided to reduce the length and weight as a single unit.

[0011] Each block molded in the factory concrete is fixed in a state where the respective pipes are integrally connected along the length thereof and cut and divided in that state.
By making the outer peripheral sides of the cut surface coincide with each other and abutting each other, all the cuts of the plurality of pipes facing each other exactly match, and tight alignment between the cuts of the pipes can be easily obtained.

In the case of a block formed of concrete in a state where the outer wall surface of the outer tube of the tube group is exposed, the band unit strengthens the binding of the tube group and reduces the bulk and weight of each block. .

[0013] In the case of a connection block formed by concretely connecting the end portions of the end blocks of adjacent blocks which are to be cut to each other, the connection block is tightly connected and molded in a factory equipped with facilities. be able to.

In the joining of the cut surfaces by the sleeve-shaped connecting member, the outer peripheral portion of the cut-and-butt portion is held by the inner peripheral wall of the connecting member which is fitted over the outer peripheral side of the cut portion butted against each other. Hold and fix.

[0015] In the joining of the cut surfaces in which the opposed protruding connection edges provided on the outer peripheral surface of the block of the cut surface are connected by a fastening member, the connection edges are brought into close contact by the tightening of the fastening member, and the cut surfaces of each other are tight. To be fixed.

[0016]

Next, an embodiment of a common groove for burying electric wires according to the present invention will be specifically described with reference to the drawings.

FIGS. 1 to 12 are views for explaining a common groove for burying electric wires embodying the present invention, and FIG. 1 is a diagram showing a concrete structure in which a conduit block 2 and a branch block 3 are connected in series in a molding plant equipped with facilities. FIG. 2 shows a conduit block 2 of a predetermined length, also molded in a molding plant, and FIG. 3 shows a connecting member 12.

In FIG. 1, a conduit block 2 has a plurality of pipes 4, 4 having a predetermined length arranged in parallel with each other in a U-shaped cross section at intervals parallel to each other along the longitudinal direction. 6 are formed, and a group of tubes 5 is formed while maintaining a mutual interval with a spacer (not shown) or the like, and a mold (not shown) is applied to the group of tubes 5 and a concrete 7 is formed by molding. From the end of the conduit block 2 to the tube ends 4a, 4a
Then, the end of the reinforcing bar 6 is protruded and molded.

The branch block 3 is arranged between the preceding and following conduit blocks 2 and 2 and is formed in a series, and a plurality of pipes 4 and 4 are arranged in parallel in the longitudinal direction with respect to the conduit block 2. The U-shaped sections are arranged side by side at intervals,
6, a tube group 5 is formed, and a tub portion 3a communicating with the hollow canopy 3b is provided between the parallel tubing members 4 and 4 at an intermediate portion along the longitudinal direction of the tubing group 5 to provide a tub portion 3a. A part of the pipes 4, 4 arranged on the side along the longitudinal direction is communicated with the measure 3a, and a transverse hole 18 is provided between the upper and lower pipes 4, 4 to penetrate the measure 3a and communicate with the outside. A spacer (not shown) is arranged to form a concrete frame (not shown).
When the branch block 3 is formed as a single block by forming a common groove forming part 1 by connecting and forming a series of blocks between the conduit blocks 2 and 2, the end of the branch block 3 is formed in the same manner as the conduit block 2. The end 4a of the tube 4 and the end of the reinforcing bar 6 are formed so as to protrude from the sides.

In the long common groove forming section 1, the inner wall surfaces of the pipes 4 are uniformly butted and connected in the longitudinal direction by using a sleeve-like connecting pipe (not shown) so as to correspond to the length of the common groove 1. Form and mold. Reference numeral 19 denotes a hanging hook, which is moved by being suspended by a crane or the like at the time of transportation and installation.

After molding, the common groove forming part 1 is formed in a molding factory.
The cutting portion 8 indicated by the two-dot chain line in FIG. 1 is cut into small pieces by cutting with a large concrete cutter such as a powerful water jet cutting machine or a large chain saw cutting machine. The cut portions 8, 8 are sequentially joined to each other by abutting each other, and the blocks are sequentially connected along the longitudinal direction to form a buried common groove.

Reference numeral 18a denotes a transverse hole formed in the direction crossing the conduit block 2 and extending between the upper and lower pipes 4, 4, and each of the wires and the like buried at the same depth outside the buried common groove extending in the longitudinal direction at the time of burying. The pipe can be inserted into the transverse hole 17a in the depth state and traversed, so that a complicated operation such as digging deeply and bypassing the lower layer of the buried common groove is not required.

In FIG. 2, a plurality of pipes 4, 4 having a predetermined length are arranged vertically and horizontally parallel to each other at intervals in the longitudinal direction and parallel to each other. The body group 5 is formed and molded with the concrete 7 to form the conduit block 2, and the tube ends 4a, 4a are protruded from both ends to form.

The conduit block 2 is cut from the cutting portion 8 and divided into short, light and light cutting blocks, and a reinforced concrete molded sleeve shown in FIG. It is fitted and connected to the inner peripheral surfaces near both ends of the shape connecting member 12 via a seal member (not shown) made of an elastic material such as rubber.

[0025]

4 and 5 are views for explaining another embodiment of the connection structure of the block cutting portions in a conduit block.
In the above, the right and left sides of the conduit block 2 across the cut portions 7, 7 are constricted 11 into concave recesses, and the inner peripheral surface is formed into a sleeve-like reinforced concrete via a sealing member (not shown). The two side walls 12a, 12a of the member 12 are fitted to the narrowed portions 11, 11 to be inserted and connected. When the embedded member is buried, the side walls 12a, 12a of the connecting member 12 are closed. 11, there is no play in the mutual insertion, and there is no protrusion from the left and right side surfaces along the longitudinal direction of the buried common groove, which is effective for burying under narrower conditions.

The sealing member interposed in the sleeve-like connecting member 12 is not shown in the drawing, but is formed into an O-ring shape with an elastic material such as rubber or synthetic resin, and is formed on the inner peripheral surface near both ends of the connecting member 12. A sealing member, which is fitted in a concave groove engraved along and has a plurality of fold sides projecting along the longitudinal direction on the surface of a strip-shaped substrate made of the same elastic material, By being attached to the peripheral surface and straddling the outer peripheral side of the abutting portion of the cut portions 8, 8 of the block 2, the block 2 is joined to the connecting member by the elastic inner peripheral surface of the seal member. 12 between the outer peripheral surface of each block 2 outside the seal member and the inner peripheral surface of the connecting member 12 by injecting ready-mixed concrete to strengthen the connection. It is possible.

[0027]

FIG. 6 is a view for explaining an embodiment of a connection structure of blocks connected adjacently along the longitudinal direction in FIG. 4 in a conduit block. Tube end portions 4a, 4a in which opposing end blocks 9, 9 of blocks 2, 2 are protruded from end sides.
Are connected by connecting pipes 4c, 4c, respectively, and a reinforcing bar is arranged on the connecting pipes 4c to form a short and small connection block 10 by molding and connecting with concrete, thereby forming each of the blocks 2 separately formed at the burial site. 2 tube ends 4a, 4
Since the work period at the site is further shortened without going through complicated and difficult connection work including the mutual alignment of a and the series of connection work at the molding factory, the connection 10a is easily and firmly made. be able to.

The end portions 4a are formed such that only one of the end blocks 9, 9 protrudes from the end side, and the mouth portion of the other end portion 4a, which is not protruded, is enlarged and directly fitted, so that the inner wall surfaces of each other are made uniform. It is also possible to enlarge both mouths without projecting both ends 4a, 4a, and to join the joint pipes in a crosswise manner. .

[0029]

7 to 9 are views for explaining another embodiment of the connecting structure of the block cutting portions in a conduit block. In FIG. 7, the outer peripheral side (upper, lower, left and right sides) of the cut portion 8 of the conduit block 2 is shown. A protruding edge 13, 13 extending in the vertical direction with the reinforcing bar 6 disposed on both left and right sides of the pipe is provided. Step portions 14b, 14b are provided at the opening portions of the protruding edges 13, 13 to form a conduit block. 2
Holes 14a, 14 penetrating horizontally along the longitudinal direction of
Concrete is molded to pierce a.

By cutting 8 of the conduit block 2 from the center of the protruding edge 13, opposed connecting edges 14, 14 are formed on the left and right sides of the cut 8, 8, respectively. A thin seal plate 15 made of an elastic material such as rubber or synthetic resin is annularly interposed in the periphery between the eight surfaces, and a fastening member 16 by a bolt and nut is inserted and fastened to the joining holes 14a and 14a of the joining edges 14 and 14. The cut portions 8 are connected in a watertight manner, and the connecting hole step portions 14b, 14b
Is filled with a filler 7a made of a sealing agent or concrete, and the head of the fastening member 16 is closed to prevent its corrosion.

[0031]

10 and 13 show another embodiment of a common groove for burying electric wires in a branch block.
1, a plurality of pipes 4, 4 are arranged in parallel in the up, down, left, and right parallel directions at intervals by spacers (not shown) or the like. Is bent upward once, and furthermore, it is bent rightward from the upper side of the upper right tubular body 4 by a curved displacement 4d, the end 4a is directed toward the right side surface, the reinforcing bar 6 is arranged, and a formwork (not shown) is formed.
Concrete 7 is poured between the pipes 4 and 4 and molded in a state where the outer surface of the pipe 4 is exposed 4b at the straight portion of the pipe group 5, and a belt 17 made of a corrosion-resistant material such as a synthetic resin is formed at an appropriate place. By bundling, the branch block 3 (conduit block) is further reduced in volume and weight, and at the same time, the joining force of the tube group 5 is strengthened and the rigidity of the block itself is enhanced.

Each of the blocks 2 and 3 used for the common groove for burying electric wires according to the present invention is molded in a molding factory according to the situation of the burial site, and the cut blocks of the blocks 2 and 3 are conveyed to the site. The pipe block 2 is stably installed on a concrete molding (not shown) such as a base laid in the longitudinal direction of the buried bottom to prevent unequal settlement, and connected to each other.
Part and the branch block 3 are reconstructed, and the blocks 2 and 3 are sequentially connected to form and embed a common groove extending in the longitudinal direction. Various electric wires and the like are inserted into the tubes 4 and 4 of the buried common groove. The required electric wires of the pipes 4 and 4 are drawn out from the basin section 3a of the branch block 3 arranged to be inserted and accommodated and extended to be drawn into each door of the building along the roadside, and are distributed to the outside of the common groove through the transverse hole 18. Things.

The branch block 3 shown in FIG. 11 is used for one-way distribution such as a cable broadcasting line which is drawn into required doors by a displaced displacement pipe 4d which is bent out.

In the embodiment according to the present invention, the tube body 4 has been described as an embodiment using a straight pipe which can be bent. However, the pipe body 4 may be a bellows pipe made of synthetic resin, metal, or any other material. By easily bending and molding using a flexible tube, not only branch displacement, but also buried common groove is flexibly displaced along the longitudinal direction,
Depending on the situation at the site, the common groove itself can be buried in the straight conduit portion with a curved meandering displacement.

The connection structure of the cut portions 8, 8 in each of the blocks 2, 3 is not limited to the structure described in the above embodiment, and may be a connection edge having a flange-shaped connection edge in accordance with the situation of the burial site. Various connecting structures are conceivable, such as a structure, and a flange-like connecting edge is connected by a holding member.

Further, by using lightweight concrete as the concrete 7, it is possible to make each of the blocks 2 and 3, that is, the cut block lighter, so that it can be easily handled in transportation or the like.

[0037]

According to the present invention, the common groove for burying electric wires and the like has the above-described structure, and is formed in a common groove including a conduit portion and a branch portion where a plurality of pipes are arranged and molded into concrete. Each of the blocks having a predetermined length is cut and divided into short, small, and lightweight pieces, thereby simplifying transportation and burying work to the site and increasing the efficiency of burying work.

In particular, since the integrally formed common groove is cut into the same plane, a plurality of pipes arranged in the longitudinal direction are joined by abutting the cut surfaces facing each other in the joining process at the time of embedding. Even if the cutting positions are not only in the straight portions but also in the places of the curved displacement, they naturally match each other, so that the joining operation of the cutting portions can be performed very easily and quickly.

For this reason, a bulky and heavy concrete molding block which cannot be transported to a site in a molding factory until now can be molded without limitation, and the most complicated and time-consuming work at the site is possible. In the process of connecting the separately molded blocks, the connection between the pipes can be reduced as much as possible by molding a long block. Shortening the curing period, combined with further shortening the construction period, helps to reduce costs and shortens the period of road occupation, thereby ensuring traffic safety.

Further, the connecting portion of each pipe in the cutting portion is configured so that the block molded into the same body as described above is once cut into the same plane, and then connected again at the site in a butt shape. Therefore, the consistency of the cut surface of each pipe body, particularly the inner wall surface, is extremely accurate.

Therefore, when the wires are inserted and laid in each pipe, the wires can be safely moved without smoothly damaging the pipe connecting portion, and a series of steps for burying the wires in the ground. This improves work efficiency.

[Brief description of the drawings]

FIG. 1 is a perspective view of a component in which a conduit block and a branch block in a common groove for burying electric wires embodying the present invention are integrally molded.

FIG. 2 is a perspective view of only a conduit block in a common groove.

FIG. 3 is a perspective view showing a connecting member in FIG. 2;

FIG. 4 is a perspective view showing a cut state of two adjacent conduit blocks of the common groove.

FIG. 5 is a perspective view showing a connecting member in FIG. 4;

6 is a perspective view of a connection block showing a state in which cut end blocks of adjacent conduit blocks in FIG. 4 are connected to each other.

FIG. 7 is a partial perspective view of another embodiment of a common groove in a conduit block.

FIG. 8 is a partially enlarged cross-sectional view showing a connection state of the cut portions in FIG. 7;

FIG. 9 is a partially enlarged cross-sectional view showing a connected state of the pipes of the cut portion in FIG. 7;

FIG. 10 is a perspective view of only a tube group showing another embodiment of the common groove in the process of forming the branch block.

FIG. 11 is a perspective view of a branch block formed by the tube group of FIG.

FIG. 12 is a front view showing a cut surface of a cut portion in FIG. 11;

FIG. 13 is a front view showing a cut surface of a cut portion in FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Common groove constituent part 2 Conduit block 3 Branch block 4 Tube 5 Tube group 6 Reinforcement 7 Concrete 8 Cutting part 9 End block 10 Connection block 10a Connection part 11 Small part 12 Connection member 13 Projection edge 14 Connection edge 16 Fastening Member 17 Belt

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigeichi Yamauchi 107-8 Oiwakecho, Kusatsu-shi, Shiga Prefecture (72) Inventor Akiko Yamauchi 107-8 Oiwakecho, Kusatsu-shi, Shiga Prefecture

Claims (6)

[Claims] 1. A conduit block consisting of a group of tubes arranged in parallel with a plurality of pipes spaced apart in a longitudinal direction and parallel to each other, and a plurality of pipes facing the conduit block. The joints are formed by arranging pipes of a group of pipes arranged in parallel with reinforcing bars so as to communicate with the outside. In the groove, an electric wire formed by cutting and dividing a molded conduit block or a branch block or a common groove forming portion having a predetermined length integrally formed with both blocks in a state crossing the longitudinal direction, and joining the cut surfaces. A common groove for burial. 2. The electric wires according to claim 1, wherein the conduit block and the branch block are formed of concrete so as to expose the outer wall surface of the outer tube body of the tube group, and are tied and bound at appropriate places with a corrosion-resistant band. Joint groove for burial. 3. The connecting block according to claim 1, wherein the conduit block and the branch block are formed by connecting pipe ends of cut and divided end blocks, arranging a reinforcing bar and molding with concrete. Joint groove for burying electric wires. 4. The electric wire according to claim 1, wherein the cut portion is inserted and connected across the cut ends joined by a sleeve-shaped connecting member formed of reinforced concrete. A common groove for burial. 5. The cut portion is formed by narrowing a part or all of an outer peripheral side of a cut end, and a sleeve-shaped connecting member straddles each narrowed portion. 5. The common groove for burying electric wires according to claim 4, wherein the common groove is inserted and connected. 6. The cutting portion is formed into a flange formed on an outer peripheral side of a concrete molding portion by integrally projecting a protruding edge, and cutting the protruding edge to form a flange on each of the cut outer peripheral sides. 2. The method according to claim 1, wherein the opposite connecting edges are fastened by a fastening member.
The joint groove for burying electric wires according to any one of the above items 1 to 3.