JPH0989187A - Coating tool for flexible pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable flexible pipes to be curvedly piped in a piping groove, so as to extremely easily perform filling back construction of the pipe groove with a coating tool, by forming many bent grooves on the peripheral surface of a cylindrical main body. SOLUTION: A cylindrical main body 11 of a coating tool 10 is composed of a pair of frame bodies 12, 13 each of which is formed into an approximately U shape in section, and many V-shaped sectional bent grooves 14, 15 are formed on the flat surfaces of the frame bodies 12, 13 over the whole width. Pipe fitting parts 28 are formed of a pair of divided parts 18, 19, and a plurality of flexible pipes 16 are fixed and concentrated to the pipe fitting parts 28. The flexible pipes 16 are bent on the vertical bending part by the specified curvature, and the coating tool 10 is also bent through the bent grooves 14, 15 by the specified curvature. The excess bending of the flexible pipes 16 is regulated by the coating tool 10, and the flexible pipes 16 can be made into a state where they are laid along the bending of the coating tool 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a covering used for burying a flexible tube for covering and protecting a power line, a communication line, an optical fiber, etc. in the ground.

[0002]

BACKGROUND OF THE INVENTION When cables such as power lines, communication lines, and optical fibers are buried in the ground, flexible tubes are used to protect these cables. The flexible pipe is a corrugated synthetic resin pipe, and can be easily bent at the site when curved pipes are avoided avoiding existing buried objects such as waterworks, sewers, and gas pipes. To bury a flexible pipe in the ground, first dig a pipe groove, install the flexible pipe at the bottom of the pipe groove, and then run a cable inside the flexible pipe, and then install the pipe. The method of backfilling the groove is adopted. However, when backfilling the pipe groove, it is necessary to tightly fill the bottom of the flexible pipe with earth and sand, and for this purpose work such as tamping the earth and sand put into the pipe groove is required. It is very troublesome. Recently, in order to make the piping compact, it is often the case that multiple flexible pipes are buried in one pipe groove, but in this case, the gap between the pipes and the lower side of the pipes are tightly filled with earth and sand. In order to do so, more labor is required.

[0003]

2. Description of the Related Art As a means for eliminating the above-mentioned work for burying pipes, a pipe (2) for burying pipes in a pipe groove (1) has been constructed as shown in FIG. A method has been proposed in which the pipes (2) are covered with the blocks (3, 4) by sandwiching the semi-circular recesses (5, 6) of (3, 4) (Japanese Patent Laid-Open No. 63-1884). According to the above construction method, it is not necessary to tamper and fill the bottom of the pipe (2) with which the pipe groove (1) is backfilled, and the labor for backfilling the pipe groove (1) is omitted. It

[0004]

However, in the above method, since the pipe (2) is not a flexible pipe and the blocks (3, 4) are not flexible, they can be easily bent and piped on site. However, there is a problem that many kinds of pipes and blocks bent with various curvatures must be prepared in advance.

[0005]

As a means for solving the above-mentioned conventional problems, the present invention provides a flexible tube having a large number of bending grooves (14, 15) formed on the peripheral surface of a cylindrical body (11). 16) Cover (10)
Is provided. The cylindrical main body (11) is preferably composed of a pair of frame bodies (12, 13) having a large number of bent grooves (14, 15) formed on the peripheral surface, and has a substantially rectangular cross section. Further, the tubular body (11) is preferably made of synthetic resin foam.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG.
The tubular body (11) of (10) is composed of a pair of frame bodies (12, 13) having a substantially U-shaped cross section. Therefore, if the frame bodies (12, 13) are combined, the tubular body (11) will be It has a substantially rectangular cross section. As shown in FIG. 2, a large number of bent grooves (14, 15) having a V-shaped cross section are formed on the plane of the frame (12, 13) over the entire width. The bent groove
As shown in FIG. 3, the (14,15) has a predetermined depth d and a predetermined outermost width W. If the depth d and the outermost width W are large, the frame body (12,13) ) Also has a smaller radius of curvature. The depth d is set in the range of 10 to 20 mm, the outermost width W is set in the range of 1.0 to 2.0 mm, and the bending groove (14, 1
The pitch of 5) is set in the range of 30 to 40 mm, for example. In the present invention, the bent groove (14, 15) has a cross section of V
All shapes other than the U-shape, such as the U-shape and the U-shape, which give the cladding tube a bendability, are included.

The covering (10) is preferably made of synthetic resin foam such as polyethylene, polypropylene, polystyrene, polyvinyl chloride or polyurethane. What is necessary is that the synthetic resin foam is flexible, lightweight and easy to carry and handle.

As shown in FIGS. 4 and 5, the covering device (10) is composed of, for example, two flexible tubes (1) bundled by a nozzle (17).
6) is coated. The flexible tube (16) is, for example, polyvinyl chloride,
Corrugated tube made of thermoplastic synthetic resin such as polyethylene, polypropylene, polystyrene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, acrylonitrile-butadiene-styrene copolymer, acrylonitrile-butadiene copolymer. , Inside the power line,
Cables such as communication lines and optical fibers are inserted.
Further, as shown in FIGS. 6 and 7, the nozzle base (17) has a semi-circular pipe support portion (2) from the mating surface of the pair of upper and lower split portions (18, 19).
(0,21) are provided, hooks (22,23) are inserted at one end of each divided portion (18,19), and an engagement portion (22,23) with which the hook (22,23) is engaged is provided at the other end. 24,25) and the pair of split parts (1
8,19) are overlaid and hooks (22,23) are engaged (2
4, 25) are engaged with each other, and further fixed by fixing both ends with screws (26, 27) to form a nozzle (17). A pipe fitting part (28, 28) is formed by the pair of divided parts (18, 19), and a plurality of flexible pipes (1) are formed in the pipe fitting part (28, 28).
Fix and focus 6). The nozzle base (17) is attached to both ends of the two flexible tubes (16), and a rubber ring (29) is provided at each end of the flexible tubes (16) at one end as shown in FIG. ) Are attached, and as shown in FIG. 9, cylindrical couplings (30) are attached to the pipe fitting portions (28, 28) of the nozzle base (17) at the other end. The coupling (30) may be integrally provided at the end of the flexible tube (16) as shown in FIG. In this way, the two flexible tubes (1
When 6) is covered with a tubular body (11), the tubular body
(11) Place the two bundled flexible tubes (16) on the lower frame (13), and then place the frame (12) on the lower frame (13). The upper and lower frame bodies (12, 13) are fixed by, for example, bonding, welding, bands, etc. to form the covering (10). One unit of the two flexible tubes (16) thus focused is, for example, four coverings (1
0) and is installed at the bottom of the pipe groove (31) as shown in FIG. 11, and one end of the flexible tube (16) is fitted with a rubber ring (29) and the other end is connected. The units are connected to each other by fitting in the coupling (30). As shown in FIG. 12, a flexible pipe is used in the vertically bent pipe portion.
The covering tool (10) is bent at a predetermined curvature of (16), and is also bent at a predetermined curvature through the bending grooves (14, 15). The depth d of the bent groove (14, 15) shown in FIG. 3 is 15 mm and the outermost width W is 1.5.
mm, the bending radius R is 2 when the bending groove pitch is 35 mm.
m. Then, the extra bend of the flexible tube (16) is restricted by the covering tool (10), and the flexible tube (16) may be in a state substantially along the bending of the covering tool (10). I can.
Usually, an air gun is used to pass a cable through the flexible tube (16), but when the flexible tube (16) is rolling, an air gun is used by the inner wall of the flexible tube (16). The lines will interfere with each other and will interfere with the lines. However, as described above, when the inside of the flexible tube (16) is restricted by the covering tool (10) of the present invention, it is easy to run the wire with an air gun.

As described above, the covering tool (1
The flexible tube (16) covered with (0) is piped side by side, and as shown in FIG.
(33) is discharged to backfill the pipe groove (31). As the earth and sand (33), excavated soil generated when excavating the pipe groove (31) is used, and if a slurry in which the excavated soil and cement are dispersed is used, tamping for filling is unnecessary. .

In the present invention, the flexible tube (16) coated with the above-mentioned coating tool (10) may be vertically arranged as shown in FIG. In this case, the pipe can handle left and right bends.
Further, as shown in FIG. 14, each frame body in which the bending groove (14A, 15A) is formed in the tubular main body (11A) of the covering (10A) of the present invention.
With the inside of (12A, 13A) as solid, a predetermined number of flexible tube fitting grooves (1
2B, 13B) may be formed. A corrugation that matches the corrugation of the flexible tube (16) is formed on the inner circumference of the fitting groove (12B, 13B).

Further, the covering may have a square cross section,
It may be oval or the like, but if it is a rectangle such as a rectangle or a square, it is not necessary to push the earth and sand under the bottom surface, and the backfilling work becomes easier. Further, bent grooves may be provided on both sides of the frame of the covering. In this case, the covering can be bent left and right. Further, the frame of the cover may be provided with bent grooves on the flat surface and both side surfaces. In this case, the covering can be bent vertically and horizontally.
Further, the flexible tube coated with the coating tool may be bundled with three or more strips, or a plurality of nozzle strips bundled with multiple strips may be arranged vertically and / or horizontally. Further, only one flexible tube may be covered with the covering tool.

[0012]

According to the present invention, the flexible pipe can be curvedly piped in the pipe groove, and further, the backfilling work of the pipe groove can be extremely facilitated by the covering tool, and the extra bend of the flexible pipe can be prevented. It can be regulated by the cover.

[Brief description of drawings]

 1 to 13 show an embodiment of the present invention.

FIG. 1 is an exploded perspective view

FIG. 2 is a sectional view.

FIG. 3 is an enlarged sectional view of a bent groove.

FIG. 4 is a plan view of a flexible tube covered state.

FIG. 5 is a side view of a flexible tube covered state.

FIG. 6 is a perspective view of a split portion of a nozzle.

[Fig. 7] Front view of notch at both ends of the nozzle

FIG. 8 is a perspective view of a pipe end portion.

FIG. 9 is a perspective view of the other end portion of the pipe.

FIG. 10 is a partial perspective view showing a form in which a coupling is integrally formed at one end of a flexible tube.

[Fig. 11] Cross-sectional view of piping groove (horizontal piping)

FIG. 12 is a sectional view for explaining a bent state of the covering tool.

[Fig. 13] Cross section of piping groove (vertical piping)

FIG. 14 is a perspective view of a cover according to another embodiment.

FIG. 15 is an explanatory diagram of a conventional art.

[Explanation of symbols]

 11,11A Jacket 12,13,12A, 13A Frame 14,15,14A, 15A Bending groove 16 Flexible tube

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Adachi 74 Aron Kasei Co., Ltd. Technical Research Institute, 1 Funami-cho, Minato-ku, Nagoya, Aichi (72) Inventor Tadanobu Suzuki, Funami-cho, Minato-ku, Nagoya, Aichi 1 No. 74 Aron Kasei Co., Ltd. Technical Research Laboratory (72) Inventor Matsutaro Naito 74 Aron Kasei Co., Ltd. Technical Research Center No. 1 Funami-cho, Minato-ku, Nagoya, Aichi

Claims (4)

[Claims] 1. A covering device for a flexible tube, characterized in that a number of bending grooves are formed on a peripheral surface of a tubular body. 2. The covering device for a flexible tube according to claim 1, wherein the tubular main body is composed of a pair of frame bodies each having a plurality of bent grooves formed on a peripheral surface thereof. 3. The flexible tube covering according to claim 1, wherein the tubular body has a substantially rectangular cross section. 4. The flexible tube covering according to claim 1, 2 or 3, wherein the tubular body is made of synthetic resin foam.