JP2862168B2 - Buried wiring box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a pipe line which can be freely adjusted in the case of forming a pipe line in the ground, can be expanded and contracted with another pipe material to be connected, and is used for countermeasures against settlement of the pipe line. Can be used to prevent cable accidents due to slipping out of underground pipelines around buildings or bridge clogging due to earthquakes, uneven settlement of the ground, etc., while making it easy to adjust the top surface of the buried hole and the lid at the time of installation And a prefabricated buried wiring box.

[0002]

2. Description of the Related Art Conventionally, when various cables such as electric wires and communication lines are laid underground, various buried wiring boxes such as manholes and handholes are buried at various points such as branch points of wiring paths. On the other hand, the buried type wiring boxes are connected to each other, and the buried type wiring box is connected to a drop-in place of a user's building or the like by a steel pipe or the like, and various cables are stored inside these. Also these buried type wiring boxes,
When steel pipes and the like are buried in the ground, sufficient measures are taken in advance for earthquakes and land subsidence that may occur in the future. In particular, the buried type wiring box and the steel pipe each have a unique frequency due to, for example, a difference in weight during an earthquake, etc., and each vibrates individually. is there.

In order to solve this problem, the connecting portion between the buried wiring box and the steel pipe or the like has a flexible tube structure or a fold-fold structure so as to obtain flexibility. It has a double tube slider structure so that it can expand and contract.

On the other hand, when installing and burying a buried type wiring box in the ground, a relatively small handhole is inserted into a buried hole for excavation, and then a flexible connection hole formed in a side wall thereof is formed. An elastic connecting pipe is installed. Also, in the case of large manholes, when constructing a formwork for constructing a side wall in a buried hole that has been excavated in the same way, a flexible and stretchable connecting pipe is pre-positioned on the side wall part, and then concrete material is It is cast and built.

[0005]

However, such a conventional structure for preventing earthquakes and ground subsidence is troublesome for rebar arrangement work, especially in the case of casting and constructing concrete material at a burial site at the time of construction. Therefore, it is troublesome and time-consuming that sufficient seismic strength cannot be obtained, and there is difficulty in placing and injecting concrete material into the gap between the positioned connecting pipes. Construction will hinder long-term traffic. Similarly, the drilling of the box side wall and the installation of the connecting pipe at the burial site are troublesome.

In order to solve these problems, it has been proposed to construct a box side wall by factory production and to assemble it at a burial site. As one of them, open the side wall of the box to which the connection pipe is attached widely,
There is a so-called boxless type in which the mortar material is filled together with the arrangement of the connection pipes. However, according to this, the strength was not stabilized due to the inability to arrange the reinforcing bar in the opened middle part, etc., and not only was the mortar filling work troublesome, but also sufficient seismic strength could not be obtained. As another example, there is a so-called sleeveless type in which a large number of sleeve holes for inserting and fixing a connection pipe are formed, and a mortar material or the like is filled and fixed around the connection pipe inserted in the sleeve hole. However, according to this, if there are many types of connection pipes, it takes time and effort during factory production, and it requires some measures to fill the mortar material, the hole diameter becomes smaller for removing the sleeve, and if the hole pitch is not expanded, the duct sleeve pipe will not be formed. It could not be inserted.

[0007] In addition, various obstacles to traffic traffic may occur if a step is formed between the upper surface of the buried hole and the lid surface that closes the upper opening of the buried wiring box during installation, and the surface is not flush. Obviously, However, in the conventional one, no problem occurs if the height of the wiring box and the excavation depth of the burial hole exactly correspond to the burial work, but it is usually troublesome to strictly adjust the correspondence between them at the burial site, It is extremely troublesome. as a result,
If a step occurs between the lid surface and the upper surface of the buried hole, the road surface around the lid is formed to have a gentle slope so that a sudden step does not occur. However, when this was done, the road surface became depressed and raised, making it extremely unsightly.

Therefore, the present invention has been made in view of the above-mentioned various existing circumstances. By assembling each of the prefabricated members at a site where the members are to be buried, the site construction is extremely simplified and the time is short. It can be constructed and enables the free adjustment of the connection angle with the steel pipe that constitutes the pipeline, and even if there is an earthquake, land subsidence, etc. To provide a buried wiring box in which the wiring path of the buried wiring box is not easily distorted, and is easily adjusted to be flush with the buried hole upper surface and the lid body at the time of installation without generating a step. Aim.

[0009]

In order to achieve the above-mentioned object, according to the present invention, a buried type wiring box 10 is buried in an excavated buried hole, while the wiring box 1 is buried.
When connecting the steel pipe P to the underground conduit by connecting the steel pipe P to the wiring box 10, a bendable wiring connection pipe 21 is previously incorporated into at least a part of the side wall of the wiring box 10, and the wiring box 10 is assembled and constructed at the site of burial. In addition, the lid 31 for closing the upper opening of the wiring box 10 is height-adjusted via the raising / lowering means 35 so as to correspond to the upper surface position of the buried hole, and is assembled and constructed. Further, the buried type wiring box itself has a U-block body 11 formed in a groove shape in cross section and a flexible wiring connection pipe 21 integrally connected to each other. Side plate 15 to be arranged and lid 3 for closing the upper opening
1, and the lid body 31 is
The raising adjustment means 35 is a long bolt shaped screw whose depth is adjusted and screwed to the upper surface of the U-block 11, and is a pavement for holding the lid 31. The adjusting bolt 3 integrally provided with the raising support flange 37 for supporting the stop plate 32
6 and a nut 38 for screwing and fixing the paving stop plate 32 on the raising support flange 37. Further, the side wall of the buried type wiring box is connected to the side plate 15, a flexible pipe portion 22 embedded and fixed in the side plate 15 itself, and the steel pipe P is slidably connected to the flexible pipe portion 22 so as to be freely bent. And a seal packing material 25 for waterproofing one end of the flexible pipe portion 22 inserted into the flexible pipe portion 22. The flexible pipe portion 22 is connected to a straight pipe portion 23 disposed on the inner side of the side plate 15 and is connected to the straight pipe portion 23. And is formed integrally with the spherical section 24 disposed on the side,
The end is slightly expanded like a trumpet, and the end of the spherical section 24 protrudes slightly outside the side plate 15.

In the present invention configured as described above,
At the burial site, by joining and assembling the U-block body 11 having the groove-shaped cross section and the side plate 15 provided with the bendable wiring connection pipe 21, labor on site construction can be reduced. After assembling, the bottom of the U block body 11 becomes a bottom wall, the side part becomes a part of the side wall, and the side plate 15 becomes a side wall closing the side opening of the U block body 11. Flexible pipe section 22
The connecting pipe portion 26 connected to the flexible pipe portion 22 is freely bendable with respect to the flexible pipe portion 22, so that the pipe direction of the steel pipe P internally connected to the connecting pipe portion 26 can be freely adjusted by the spherical section 24, Smooth alignment of pipes at construction sites. Further, the connecting pipe section 26 connects the steel pipe P to be connected and connected slidably, for example, in the event of an earthquake, land subsidence, etc., in order to connect the pipe section even if there is a different vibration and movement between the wiring box 10 body and the pipe section. The box 10 is bent in an arbitrary direction with respect to the main body, and the connection length is freely adjusted so as to cope with these. At this time, the seal packing material 25 in the flexible pipe portion 22 performs a water stopping process even if the direction of the connection pipe portion 26 inserted therein is freely set, thereby preventing infiltration of groundwater or the like into the inside. . The raising adjusting means 35 finely adjusts the height position of the lid 31 closing the upper opening of the assembled wiring box 10 to dig the digging depth of the buried hole at the construction site and the wiring box 1.
Even if there is any inconsistency with the installation height of 0, the position of the cover 31 surface and the position of the buried hole upper surface are made to be flush with each other to prevent the occurrence of a step on the road surface after construction.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a branching part in an underground wiring path, a part drawn into a building by a user, or the like. , A bottom plate of a digging hole for installing a buried type wiring box B such as a manhole or a handhole buried in an inspection part or the like. This floor plate 1 is placed on the top of the crushed stone 2 and the mortar material spread on the bottom of the excavation hole, and is connected to each other by the floor plate connecting plate 3 to correspond to the size of the bottom shape of the wiring box 10 to be buried. For example, it is formed in a rectangular plate shape of an appropriate size by a concrete material containing a reinforcing bar. Then, a predetermined wiring box 10 is assembled and constructed on the floor plate 1, and a wiring connection pipe 21 attached to a side wall of the wiring box 10 and a steel pipe P connected to the wiring connection pipe 21 are stored in the underground where cables are stored. Constructs a pipeline.

As shown in the drawing, the wiring box 10 is formed by integrally connecting a U-block body 11 formed in a groove shape in cross section and a wiring connection pipe 21 so as to be disposed in a side opening of the U-block body 11. Side plate 15 and a lid 31 for closing the upper opening, all of which are provided with appropriate hanging tools such as hooks and eye bolts so that they can be hung by a crane or the like at the burial site. .

The U-block body 11 is integrally formed of a concrete material in which a reinforcing bar is provided. The bottom is formed on the bottom wall, and the side is formed as a part of the side wall. Depending on the size of a switchboard or the like installed above, an appropriate number of components are interconnected so that the internal capacity can be adjusted and set correspondingly. That is, the ones set to a predetermined length are adjacent to each other and can be connected to each other, and the side opening edge surface is formed with connection unevenness portions 12 such that the adjacent ones mesh with each other. In addition, the box connecting plates straddle each other and are fixed. In addition, the U-block body 11 has an appropriate number of oval shapes, circular shapes, etc. for connecting pipes to the side so as to constitute a pipe for road crossing, for example.
A knockout portion 13 such as a rectangle is provided on a side portion, and a cable lead-in metal fitting 14 is fitted into a bottom edge of the side opening.

The side plate 15 has a size and a shape to close the side opening of the U-block body 11, and is integrally formed with the wiring connection pipe 21 by a concrete material having a reinforcing bar disposed therein. In order to connect and fix the side plate 15 to the side opening of the U-block body 11, as shown in FIGS. A similar through-hole 12 is formed, and a through-hole through which a connection screw rod 17 screwed through an insert tool 16 is inserted through a side opening edge of the U-block body 11 is opened in a side edge of the side plate 15. It is pierced and fastened to the end of the connecting screw rod 17 which has been inserted through the through-hole and out with a double nut 18 or the like via a washer. In addition, between the surface of the side plate 15 and the side opening edge surface of the U block body 11, a water stopping process is performed by interposing a packing or the like.

The wiring connection pipe 21 integral with the side plate 15 is made of a steel pipe of various predetermined diameters having an appropriate thickness.
The wiring connection pipes 21 are arranged in an appropriate number in each of the upper, lower, left and right directions, and each of the wiring connection pipes 21 is bent into the flexible pipe section 22 fixedly embedded in the side plate 15 itself. And a connecting pipe portion 26 that is freely connected and connects the steel pipe P slidably. The flexible pipe portion 22 is connected to a straight pipe portion 23 disposed on the inner side of the side plate 15 and is continuous with the straight pipe portion 23. Is formed integrally with the spherical section 24 disposed at
The end of the straight pipe portion 23 is slightly expanded in a trumpet shape, and the end of the spherical section 24 projects slightly outside the side plate 15. Further, the connection pipe portion 26 is partially curved into a spherical surface so that one end thereof can be freely bent and inserted into the spherical section 24 through the seal packing material 25 while being subjected to a water stopping process. The other end side is a slide portion bulged to a slightly large diameter so that the steel pipe P is slidably housed inside.

The arcuate curved surface of the inner peripheral surface of the spherical section 24 is a part of a sphere centered on the axis of the straight pipe section 23, and the connecting pipe fitted into the spherical section 24. The connecting pipe 26 itself is bent at a predetermined angle by being swung in a predetermined direction via a seal packing material 25 in contact with the inner peripheral surface of the spherical section 24 at one end. At this time, when one end of the connecting pipe portion 26 is swung in the spherical section 24, the outer peripheral surface of the connecting pipe section 26 is brought into contact with the opening edge of the spherical section 24, so Care should be taken to prevent the swinging of the connecting pipe portion 26 from pulling out of the spherical section 24. As shown in the figure, a seal packing material 25 for stopping water between the spherical section 24 and the curved portion at one end of the connecting pipe portion 26 is formed by, for example, recessing the outer circumferential surface itself around the outer circumferential surface of the connecting pipe portion 26. The seal packing material 25 itself has a ring-like shape fitted into the recessed portion formed by crimping, and the outer peripheral side surface of the seal packing material 25 itself is in close contact with the inner side surface of the spherical section 24.

A slide seal packing material 27 that shuts off water by closing a gap between the outer peripheral surface of the steel pipe P to be slid and inserted therein is provided on the inner peripheral surface of the connecting pipe portion 26 on the opening end side of the slide portion. . The slide seal packing material 27 is sandwiched by being forcibly fitted into the inner surface of the groove-shaped bulging portion having a diameter slightly larger than that of the slide portion main body, and has a smaller diameter than the outer diameter of the steel pipe P. Such an appropriate number of ridges are formed on the inner peripheral side surface.

Further, as shown in FIG. 4, the side plate 15 may be provided with an appropriate number of sleeve removal holes 28 and knockout portions 29, respectively, and these may be selectively used in accordance with the wiring conditions at the installation site and the like. The provided one is used.

The lid 31 is attached to the upper opening of the U-block 11 and the side plate 15 which are connected and assembled together. The lid 31 is a frame-shaped assembly type fitted and fixed around the upper opening. It is arranged and set in the pavement stopping plate 32 in a divided manner.

When the lid 31 is covered via the pavement stopping plate 32 so as to close the upper opening of the wiring box 10, the lid 31 is raised so that the surface of the lid 31 is adjusted to be flush with the upper surface of the buried hole. Adjusting means 35 is provided.
That is, when arranging the lid 31 on the U-block 11, by supporting the lid 31 via the pavement stopping plate 32 held at a predetermined height interval with respect to the U-block 11, That is, the surface of the lid 31 can be made flat with the road surface around the buried hole. The raising adjustment means 35 for this purpose is, as shown in FIGS.
1 is a long bolt with a hexagonal hole whose screwing depth is adjusted on the upper surface and is screwed into a standing leg,
An adjusting bolt 36 integrally provided with a raising support flange 37 for supporting the
And a nut 38 for fixing the pavement stop plate 32 mounted on the screw 7 with screws. A mounting hole 34 through which the adjustment bolt 36 is inserted is formed in the horizontal surface portion 33 of the pavement stopping plate 32 on which the lid 31 is placed. Thus, the U block body 11
The paving stop plate 32 itself is held by the raised support flange 37 by aligning and inserting the adjustment bolt 36 screwed above with the mounting hole 34, and the adjustment bolt 36 adjusted at this time is screwed. Depending on the degree of the depth, the holding height of the pavement stopping plate 32 is set, for example, in the case of a low position as shown in FIG. 6 (B) or in the case of a high position as shown in FIG. 6 (C). Then, the nut 38 is screwed into the screw portion of the adjustment bolt 36 projecting above the horizontal surface portion 33, and the wrench jig fitted into the hexagonal hole of the adjustment bolt 36 and the nut turning jig rotating the nut 38 are rotated. The paving stop plate 32 is firmly fixed at a predetermined height position. The adjusting bolts 36 can be selected according to the situation at the installation site, for example, as two types of long and short, and the paving stopper plate 32 itself is formed to be long along the arrangement direction of the lids 31 and a pair of sections facing each other. A pair of short pavement stopping plates 32B having a substantially L-shaped cross section facing each other are engaged between the ends of the substantially L-shaped long pavement stopping plates 32A through the engaging portions 39, thereby forming a flat surface. , So that it is configured in a rectangular frame shape. Reference numeral 41 denotes the horizontal surface portion 3 of the long pavement stopping plate 32A.
3 is a rubber packing material disposed on the top of the rubber packing material.

The pavement stop plate 32 is formed in a frame shape by engaging the long pavement stop plate 32A and the short pavement stop plate 32B through the engagement portion 39. It can be easily carried into the installation site while being disassembled, and handling can be facilitated.

Next, an example of assembling work will be described. For example, a base part is formed by laying a base plate 1 on a crushed base stone 2 placed at the bottom of a buried hole excavated at an installation place such as a road side zone, The U block 11 is placed on the base plate 1 by a crane or the like. At this time, a predetermined number of cables are connected to each other to set a predetermined space capacity in accordance with the number of wires of the cable, and the U block body 11 which is connected and opened is also provided.
A connecting screw bar 17 is provided in a protruding manner on the side surface of the side opening through an insert 16. Next, the side plate 15 is joined to the side opening of the U-block body 11 and fastened to the nut 18, and the flexible tube portion 22 corresponding to the wiring direction of the cable housed inside the wiring connection tube 21 integrated with the side plate 15. The connecting pipe 26 is bent in an appropriate direction, and a steel pipe P called an SVP pipe or a PV pipe is slidably inserted into the connecting pipe 26 and fixed. At this time, a blind member or the like is fitted into the unused wiring connection pipe 21 and closed. On the other hand, a pipe for road crossing is connected and configured by a knockout portion 13 on the side of the U-block body 11, and a cover is provided by a pavement stopping plate 32 which is arranged in the upper opening by adjusting the height through a raising adjusting means 35. The bodies 31 are arranged and placed, aligned with the upper surface of the buried hole, and backfilled.

Although not particularly shown, the wiring box 10 assembled by the U-block body 11, the side plate 15, etc. is not limited to the case of a manhole structure,
The side plate 15 itself may have a handhole structure, and the side plate 15 itself may have a support wall structure at the front and rear portions of the bridge.

[0024]

The present invention is configured as described above.
Since each member is prefabricated and assembled at the site, site construction is extremely simple, and the connection angle with the steel pipe P constituting the pipeline can be freely adjusted by the bendable wiring connection pipe 21. Even if there is land subsidence or the like, it bends and expands and contracts in accordance with the land subsidence, and does not cause distortion in the connected tubular wiring path.

That is, this is a flexible wiring connection pipe 21.
Is preliminarily incorporated into a part of the side wall, and the wiring box 10 is assembled and constructed in a prefabricated manner at the burial site. In the wiring connection pipe 21, the connection pipe section 26 for slidably connecting the steel pipe P is provided. This is because the flexible pipe portion 22 is flexibly connected to the flexible pipe portion 22 via the seal packing material 25.

At the burial site, the on-site work is almost completed by assembling the side plate 15 having the bendable wiring connection pipe 21 with the U-block body 11 having a groove-shaped cross section, so that the conventional concrete work is completed. On-site casting of materials,
It is not necessary to adjust the setting of the piping direction at the site, the work can be completed quickly and easily, and even a road with a large traffic volume is hardly obstructed.

In the wiring connection pipe 21, the connection pipe 26 connected to the flexible pipe 22 is the flexible pipe 2.
2, the pipe direction of the steel pipe P internally connected to the connection pipe part 26 can be freely adjusted by the spherical section 24, and the steel pipe P to be connected and piped can be positioned smoothly. You can do it. In addition, connection pipe section 26
Can be connected by adjusting the steel pipe P so that it can slide freely. For example, in the event of an earthquake, land subsidence, etc., even if there is a different vibration or movement between the main body of the wiring box 10 and the piping part, the piping part can move in any direction with respect to the main body of the wiring box 10. By being bent at the connection length is adjusted freely, distortion in the wiring path,
Withdrawal does not occur.

Further, at this time, the seal packing material 25 in the spherical section 24 of the flexible pipe section 22 is waterproof even if the direction of the connection pipe section 26 inserted and inserted therein is freely set. This ensures the treatment and prevents infiltration of groundwater and the like into the inside.

The side plate 1 in which the wiring connection pipe 21 is incorporated.
5 can easily cope with an increase or decrease in the number of pipelines when constructing the pipelines, and by forming in advance an appropriate number, unnecessary ones can be closed by fitting blind members or the like. Often,
Even after the obstruction, if necessary, by removing the blind member or the like, the space for the passage can be formed, and it is possible to easily cope with a change such as an increase or decrease in the number of pipelines after the installation.

Further, the height of the paving stop plate 32 is set by adjusting the screwing depth of the adjusting bolt 36 provided with the raising support flange 37 with respect to the upper surface of the U block body 11, and the lid 31 is moved by the paving stop plate 32. Since the holding and raising adjusting means 35 is provided, the height position of the lid 31 can be finely adjusted, and even if there is a discrepancy between the digging depth of the buried hole at the construction site and the installation height of the wiring box 10. The surface of the lid 31 and the upper surface of the buried hole can be flush with each other, so that the occurrence of a step on the road surface after construction can be prevented, and a flat road surface can be formed.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an assembled buried type wiring box according to an embodiment of the present invention.

FIG. 2 is a side sectional view of a side wall of the buried type wiring box of the same assembling type.

FIG. 3 is a side sectional view of a main part of the side wall.

FIG. 4 is a side sectional view of a side wall of an assembling type buried type wiring box in another embodiment.

FIG. 5 is an exploded perspective view of the raising adjustment means.

FIG. 6 is a side sectional view of an essential part in a state where the height is adjusted by the raising adjustment means, and FIG.
(B) shows a case where the camera is adjusted and supported at a lower position, and (C) shows a case where the camera is adjusted and supported at a higher position.

[Explanation of symbols]

P ... steel pipe 1 ... floor plate 2 ... crushed stone 3 ... floor plate connecting plate 10 ... wiring box 11 ... U block body 12 ... connection concave and convex part 13 ... knockout part 14 ... cable pull-in hardware 15 ... side plate 16 ... insert tool 17 ... connection Screw rod 18 Nut 21 Wiring connection pipe 22 Flexible pipe part 23 Straight pipe part 24 Bulkhead part 25 Seal packing material 26 Connection pipe part 27 Slide seal packing material 28 Sleeve release hole 29 Knockout part DESCRIPTION OF SYMBOLS 31 ... Lid 32 ... Paving stop plate 32A ... Long pavement stopping plate 32B ... Short pavement stopping plate 33 ... Horizontal plane part 34 ... Mounting hole 35 ... Raising adjustment means 36 ... Adjustment bolt 37 ... Raising support flange 38 ... Nut 39 ... engaging part 41 ... rubber backing material

Continuation of the front page (72) Inventor: Ko Saito 4-7-20 Toyo, Koto-ku, Tokyo Doi Corporation (56) References JP-A-9-217371 (JP, A) JP-A-6-173285 ( JP, A) JP-A-9-93776 (JP, A) JP-A-9-121420 (JP, A) JP-A-8-27821 (JP, A) JP-A-4-57537 (JP, U) Hei 7-87666 (JP, B2) JP 4-23485 (JP, B2) JP 6-23153 (JP, Y2) JP 4 19083 (JP, Y2) Utility model registration 3018423 (JP, U )

Claims (1)

(57) [Claims] 1. A U-block body formed in a groove shape in cross section, and a side plate in which a bendable wiring connection pipe is integrally connected and arranged at a side opening in the U-block body. A lid which is disposed on the upper opening of the U-block body via the raising-adjustment means and closes the upper opening, wherein the raising-adjustment means is screwed to the upper surface of the U-block body by adjusting the screwing depth. It consists of an adjusting bolt having a long bolt shape and integrally provided with a raising support flange for supporting a paving stop plate holding a lid, and a nut for fixing the paving stop plate on the raising support flange with a screw. A buried type wiring box, characterized in that: