JP2003087951A - Cable raising member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that transportation and installation are difficult due to heavy concrete foundation used for raising a conduit. SOLUTION: This cable raising member, used to raise an embedded cable laid under the ground on the ground, is formed with a lead-in hole for leading the embedded cable in an internal space and a lead-out hole for leading out the embedded cable led in the internal space. When the embedded cable led in the internal space from the lead-in hole is led out, the cable is bent at a prescribed bending radius and raised on the ground.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable raising member for raising a buried cable connected to various ground facilities such as a telephone pole, a pole light, a traffic signal, a signboard, and a display board from the ground to the ground. is there.

[0002]

2. Description of the Related Art When it is necessary to supply electric power or a signal to a ground facility, a buried cable laid underground is set up on the ground immediately below or near the ground facility.
It is necessary to draw this into the ground equipment. Therefore, conventionally, a foundation made of concrete or reinforced concrete having a guide portion and a bent portion for launching the buried cable to the ground was constructed, and the ground equipment was installed by the foundation, and the buried cable was launched to the ground. Was there.

[0003]

There are the following problems in starting up a buried cable using a concrete or reinforced concrete foundation. (1) In general, a concrete or reinforced concrete foundation is constructed by casting concrete on site. However, a certain training period is required for the cast concrete to reach a predetermined strength and hardness, and the construction requires several days. (2) If a foundation made of concrete or reinforced concrete is made in advance in the factory, the on-site construction period can be shortened. However, concrete or reinforced concrete foundations are heavy and not easy to transport and install. (3) It may be necessary to temporarily remove the above-ground equipment in order to perform cable repair work or extension work. However, since the installed ground facilities cannot be removed unless the foundation is broken, the above work takes time and effort.

[0004]

One of the cable raising members of the present invention is a cable raising member for raising an embedded cable laid in the ground to the ground, which is a hollow member body. , A pull-in hole capable of pulling the embedded cable into the internal space and a pull-out hole capable of pulling out the embedded cable pulled into the internal space, and pulling out the embedded cable pulled into the internal space from the pull-in hole When it is pulled out from the cable, the cable is bent at a predetermined bending radius and is raised to the ground.

Another of the cable raising members of the present invention is that the peripheral surface of the internal space is an arcuate surface which allows a buried cable bent along the peripheral surface to maintain a predetermined bending radius.

Another one of the cable raising members of the present invention is one in which the protection tube can be fixed so that the end portion of the protection tube through which the buried cable is passed is held in the extraction hole.

In another one of the cable raising members of the present invention, a ground facility to which a buried cable pulled out from a pull-out hole is connected can be fixed to a member body so that the ground facility can also serve as a foundation. It is a thing.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION (Embodiment 1) The cable raising member of the present invention is used for raising an embedded cable to the ground and connecting it to ground equipment. As shown in FIG. 1, the cable raising member according to the present embodiment includes a bottom plate 1 serving as a base, a member main body 3 having a structure for raising the embedded cable 2 toward the ground, and a ground facility 4. It is composed of a fixing portion 5 for fixing to the member main body 3. In addition, as shown in FIG.
It is generally buried in the ground in a state of being run through in 0 (for example, a corrugated synthetic resin protective tube). Therefore, in the cable raising member according to the present embodiment, the embedded cable 2 can be raised together with the protection tube 60 toward the ground. When connecting the raised embedded cable 2 to the above-ground equipment 4, it is desirable to cut the protective tube 60 raised together with the cable 2 at a desired position to expose the embedded cable 2 inside.

As shown in FIG. 1, when installing the cable raising member, the member main body 3 is laminated on the bottom plate 1 and the fixing portion 5 is laminated on the member main body 3. Further, the bottom plate 1, the member main body 3, and the fixing portion 5 which are laminated are fixed by a fixing tool 6 to be integrated.

As shown in FIGS. 2A and 2B, the bottom plate 1 is a disk-shaped plastic molding. A ring-shaped fitting groove 11 is formed on the upper surface 10 of the bottom plate 1 over the entire circumference thereof. When the member main body 3 is installed on the bottom plate 1, the lower end portion 12 of the member main body 3 is fitted into the fitting groove 11 as shown in FIG. Further, four through holes 13 are formed inside the fitting groove 11 at 90 ° intervals in the circumferential direction. Further, on the lower surface of the bottom plate 1, there are fixed plates 14 to be described later.
A circular recess 15 for fitting (FIG. 1) is formed. The through hole 13 communicates with the circular recess 15.

As shown in FIGS. 3A and 3B, the member main body 3 is a hollow plastic molding. Figure 3 (b)
As shown in FIG. 3, a convex bulging portion 16 is integrally formed in the center of the upper surface of the member main body 3. As shown in FIG. 1, the bulging portion 16 can be inserted into the pillar 17 of the ground facility 4. When the bulging portion 16 is inserted into the inside of the pillar 17 of the above-ground equipment 4, a flange 18 protruding from the lower end of the pillar 17 is provided.
Ride on the upper surface 19 (around the bulging portion 16) of the member body 3.
As described above, the ground facility 4 is installed on the member body 3.

As shown in FIGS. 3 (a) and 3 (b), a drawing-in hole 21 communicating with the internal space 20 is formed in the lower part of the outer peripheral surface of the member main body 3, and as shown in FIG. The protection tube 60 can be drawn into the internal space 20 from the hole 21. As shown in FIGS. 3 (a) and 3 (b), the top end surface 22 of the bulging portion 16 is provided with a drawing hole 23 that communicates with the internal space 20, and as shown in FIG. The protection tube 60 drawn inside can be drawn out from the drawing hole 23. The pull-in holes 21 and the pull-out holes 23 are formed in the circumferential direction of the member main body 3 at intervals of 90 °. As shown in FIG. 1, when the protective tube 60 drawn into the internal space 20 from the arbitrary drawing hole 21 is pulled out from the arbitrary drawing hole 23, the protective tube 60 moves upward in the internal space 20 at a predetermined bending radius. It is bent and launched to the ground side. Therefore, when the embedded cable 2 is passed through the protective pipe 60, the embedded cable 2 is also bent upward in the internal space 20 with a predetermined bending radius and is raised to the ground side.
In order to pass the buried cable 2 through the protection tube 60, a string or the like is previously passed through the protection tube 60, and
After starting 0 as described above, one end of a string or the like protruding from one end (the side of the lead-in hole 21) of the protection tube 60 is tied to the end of the embedded cable 2, and the other end of the string or the like is protected by the protection tube. Pull from the other end of 60 (outlet hole 23 side).

After the protective tube 60 is pulled in from the pull-in hole 21 and after the protective tube 60 is pulled out from the pull-out hole 23, these parts are subjected to a waterproof treatment for preventing water from entering the internal space 20. Is desirable. Specifically, as shown in FIG. 1, the drawing hole 21 and the drawing hole 23.
Outside of the above, the protective tube 60 is covered with the waterproof packing 30, and the waterproof packing 30 covers the gap 31 between the protective tube 60 and the drawing hole 21 or the drawing hole 23.
Here, the waterproof packing also serves to fix the protective tube 60 to the main body 3. In particular, the waterproof packing 30 for closing the extraction hole 23 fixes the protection tube 60 so that the end of the protection tube 60 drawn out from the extraction hole 23 is held at a position higher than the ground surface (GL). To do.

As shown in FIG. 3B, the drawing hole 21
A fixing bolt 62 for fixing the protective member 61 arranged on the outer side of the protective pipe 60 so as to cover the protective pipe 60 is disposed above the outer side of the protective pipe 61. The fixing bolt 62 is screwed into a fixing nut 64 attached to the entrance of the elongated hole 63 formed in the main body 3, one end is inserted into the elongated hole 63, and the other end is outside the main body 3. It is protruding. Therefore, by adjusting the protruding length of the fixing bolt 62,
When the end portion of the bolt is pressed against the protection member 61, the bolt 6
A protective member 61 is sandwiched and fixed between 2 and the bottom plate 1. However, when the protective member 61 is not arranged outside the protective tube 60, the fixing bolt 62 may be pressed against the protective tube 60 to fix the protective tube 60.

A peripheral surface 40 of the internal space 20 shown in FIG. 3 (b).
Form an arc surface for keeping the embedded cable 2 raised in the internal space 20 at a predetermined bending radius. Specifically, when axial tension acts on the embedded cable 2 that has been raised as shown in FIG. 1, the protective tube 60 and the embedded cable 2 inside the protective tube 60 are pulled toward the peripheral surface 40 side, It is pressed against the peripheral surface 40. Therefore, even if the lower portion of the peripheral surface 40 is bent along the lower portion of the protective tube 60 and the embedded cable 2 which is pressed against the lower portion, the predetermined bending radius of the cable 2 is suppressed within the predetermined range. It is an arc surface with a certain curvature.

As shown in FIGS. 3 (a) and 3 (b), the member main body 3 is provided with four through holes 41 vertically penetrating the member main body 3 at intervals of 90 ° in the circumferential direction. As shown in FIG. 1, when the member main body 3 is stacked on the bottom plate 1, the through holes 41 communicate with the through holes 13 of the bottom plate 1.

As shown in FIGS. 4A and 4B, the fixing portion 5 is a ring-shaped plastic molding having a circular opening 50 formed in the center. The fixing portion 5 can be attached to the periphery of the pillar 17 by passing the pillar 17 of the ground facility 4 through the circular opening 50. Therefore, before the ground equipment 4 is installed on the member body 3, the fixing portion 5 is attached to the pillar 17 of the ground equipment 4, and after the ground equipment 4 is installed on the member body 3, the fixing portion 5 is installed. When 5 is fixed to the member main body 3, the flange 18 of the column 17 is sandwiched and fixed between the fixing portion 5 and the member main body 3 (upper surface 19) (FIG. 1).
In addition, even if the flange 18 is sandwiched between the member main body 3, the bottom surface of the fixed portion 5 is hollowed out in a circular shape so that a gap is not formed between the fixed portion 5 and the upper surface 19 of the member main body 3. (Fig. 4b).

As shown in FIGS. 4A and 4B, the fixing portion 5 is provided with four through holes 51 penetrating the fixing portion 5 in the thickness direction at 90 ° intervals in the circumferential direction. When the flange 18 is sandwiched between the fixing portion 5 and the member main body 3 (upper surface 19) as described above, the through hole 51 is formed into the through hole of the flange 18 and the through hole 41 of the member main body 3 which are not shown. Communicate. That is, as shown in FIG. 1, the member main body 3 is provided on the bottom plate 1.
, The ground equipment 4 is installed on the member main body 3,
When the flange 18 of the pillar 17 of the ground facility 4 is sandwiched between the fixing member 5 and the member main body 3, the through hole 13 of the bottom plate 1, the through hole 41 of the member main body 3, the through hole of the flange 18,
All of the through holes 51 of the fixed portion 5 communicate with each other. Therefore, if the cable raising member of the present invention is installed according to the following order, the ground equipment 4 can be installed and the embedded cable 2 can be connected to the installed ground equipment 4.

(1) One end of the fixing bolt 6A is screwed onto the fixing plate 14 to stand the fixing bolt 6A on the fixing plate 14. (2) The fixing bolt 6A is passed through the through hole 13 of the bottom plate 1 to stack the bottom plate 1 on the fixing plate 14. (3) The ground at the installation position of the ground facility 4 is excavated to dig a hole, and the bottom plate 1 is placed in the hole. (4) The fixing bolt 6A protruding from the bottom plate 1 is passed through the through hole 41 of the member main body 3 to stack the member main body 4 on the bottom plate 1. (5) The protection member 61A is installed so that its end portion rides on the bottom plate 1. (6) From the lead-in hole 21 of the member body 3 to the internal space 2
The protection tube 60 is drawn into the inside of the hole 0, and is pulled out from the drawing hole 23. (7) Protective tube 60 drawn out from the drawing hole 23
The packing 30 is attached to the and the protection tube 60 is fixed to the member main body 3. Then, the protective tube 60 is cut at a desired position. (8) Another protective member 61B is covered on the protective member 61A and fixed with a bolt 62. (9) The embedded cable 2 is pulled into the protective tube 60, and the embedded cable 2 is pulled out from the protective tube 60 with a desired extra length. (10) After attaching the fixing portion 5 to the pillar 17 of the ground facility 4, the ground facility 4 is installed on the member main body 3. At this time, it goes without saying that the fixing bolt 6A projecting from the member main body 3 is passed through the through hole of the flange 18 projecting from the pillar 17. (11) The fixing bolt 6A protruding from the through hole of the flange 18 is passed through the through hole 51 of the fixing portion 5, and the fixing portion 5
To the flange 18. (12) The nut 6B is screwed into the end portion of the fixing bolt 6A protruding from the through hole 51 of the fixing portion 5. As described above, the bottom plate 1, the member main body 3, and the fixing portion 5 are fixed and integrated, and the above-ground equipment 4 is fixed thereto. (13) Fill back the holes.

When all or part of the fixed plate 14, the bottom plate 1, the member main body 3, and the fixed portion 5 are made of plastic,
By appropriate treatment when exchanging or discarding these, they can be reused as recycled plastic materials.
Also, when reusing, glass scrap, sand, metal pieces, wood pieces,
Power cable scraps, optical fiber scraps, etc. can also be added and reused.

(Embodiment 2) There is no particular limitation on the number of the drawing holes 21 and the drawing holes 23. However, the bulge 1
When the lead-out hole 23 is formed in the top end face 22 of No. 6, it is desirable to take care so that the top end face 22 has a strength capable of withstanding a stress load of 3 times the number of cables × the weight of the cables. The lead-in hole 21 and the lead-out hole 23 can be opened (added) at the site. If the lead-in hole 21 is added, the lead-in position of the embedded cable 2 with respect to the member main body 3 can be arbitrarily changed. For example, if the existing lead-in hole 21 is used, it is possible to add one or both of the lead-in hole 21 and the lead-out hole 23 when it does not fit the installation route of the buried cable 2. When the additional drawing hole 21 is added, the fixing bolt 62 is attached to the outside of the additional drawing hole 21. For example, in FIG.
As shown in, the bracket 70 is screwed to the outer peripheral surface of the main body 3, and the fixing bolt 62 is attached to the bracket 70.

There is no particular limitation on the embedded cable that can be raised by the cable raising member of the present invention. For example, a power cable or a communication cable can be raised. The material of the bottom plate, the member main body, and the fixing portion is not limited to plastic, but a light weight and high strength material is desirable.

[0023]

One of the cable raising members of the present invention has the following effects because the member main body having the structure for raising the embedded cable has a hollow structure. (1) Light weight, easy to transport and install. In particular, when the member main body and other components are made of plastic, this effect becomes extremely remarkable. When the member main body and other components are made of plastic, the weight can be reduced by about 40% as compared with the concrete or reinforced concrete foundation that has been conventionally used to start up the buried cable.

One of the cable raising members of the present invention is
Since the inner surface of the internal space of the member main body is an arc surface in which the bending radius of the embedded cable is kept within a predetermined range, the following effects are obtained. (1) Since the bending radius of the embedded cable is maintained within a predetermined range, it is difficult for the cable to be damaged, broken, or bent.

One of the cable raising members of the present invention is
Since the protection tube can be fixed so that the end portion of the protection tube through which the embedded cable is passed is held at a predetermined position, the following effects can be obtained. (1) Since the protective tube can be securely fixed at the predetermined position, the protective tube does not fall off. (2) If the end of the protective tube is held at a sufficiently high position, it is possible to prevent water from entering the protective tube during rain or water damage.

One of the cable raising members of the present invention is
Since the ground equipment can be fixed and also functions as the basis of the ground equipment, the following effects can be obtained. (1) It is possible to simultaneously start up a buried cable and install ground equipment without constructing a conventional concrete or reinforced concrete foundation. (2) Since it is lightweight and easy to transport, it is possible to manufacture the member main body and other members in advance at the factory and transport them to the site for use. Therefore, the concrete training period, which was indispensable in the past, is omitted, and the construction period is shortened. (3) If the above-ground equipment can be fixed and released, the above-ground equipment can be removed as needed without breaking the foundation. Therefore, cable repair work and extension work are simplified.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a cable raising member of the present invention.

2A and 2B are views showing an example of a bottom plate, FIG. 2A is a plan view, and FIG. 2B is a sectional view taken along line AA of FIG.

3A and 3B are views showing an example of a member main body, in which FIG. 3A is a plan view and FIG. 3B is a sectional view taken along line BB of FIG.

4A and 4B are views showing an example of a fixing portion, in which FIG. 4A is a plan view and FIG. 4B is a sectional view taken along line CC of FIG.

FIG. 5 is a cross-sectional view showing another example of the member main body.

[Explanation of symbols]

1 bottom plate 2 buried cable 3 body 4 Ground equipment 5 Fixed part 20 internal space 21 Inlet hole 23 Draw-out hole 40 Peripheral surface of internal space 60 protection tube

Claims (4)

[Claims] 1. A cable raising member for raising an embedded cable laid in the ground to the ground, wherein a hollow member body is provided with a lead-in hole capable of pulling the embedded cable into an internal space. An extraction hole is formed through which the embedded cable drawn into the space can be extracted, and when the embedded cable drawn into the internal space from the extraction hole is drawn out from the extraction hole, the cable is bent at a predetermined bending radius and is grounded. A cable start-up member characterized by being started up. 2. The cable raising member according to claim 1, wherein the peripheral surface of the internal space is an arc surface capable of holding a predetermined bending radius of the embedded cable bent along the peripheral surface. 3. The cable stand according to claim 1, wherein the protection tube can be fixed so that an end portion of the protection tube through which the embedded cable is passed is held in the extraction hole. Lifting member. 4. A ground facility, to which a buried cable drawn out from an extraction hole is connected, can be fixed to the member body,
The cable raising member according to any one of claims 1 to 3, wherein the cable raising member can also serve as a foundation of the above-ground equipment.