JP3161950B2 - Flexible tube covering tool and plumbing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a covering tool and a piping method used when burying and piping a flexible tube for covering and protecting a power line, a communication line, an optical fiber and the like underground.

[0002]

BACKGROUND ART When cables such as power lines, communication lines, and optical fibers are buried underground, flexible tubes are used to protect these cables. The flexible pipe is a corrugated synthetic resin pipe, and can be easily bent on site when curved piping is performed avoiding existing buried objects such as water supply, sewerage, and gas pipes. To lay a flexible tube buried underground, first dig a pipe groove, install the flexible tube at the bottom of the pipe groove,
Next, a cable is passed through the inside of the flexible tube, and then the pipe groove is filled back. However, when backfilling the pipe trench, the earth and sand must be tightly filled to the lower side of the flexible pipe. It is very troublesome. Recently, in order to make 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 pipe are filled with earth and sand tightly. In order to do so, more labor is required.

[0003]

2. Description of the Related Art Conventionally, as a means for eliminating the trouble of burying pipes, as shown in FIG. 15, a pipe (2) buried in a pipe groove (1) is formed of a pair of upper and lower blocks made of a synthetic resin foam. A method has been proposed in which the tube (2) is covered with a block (3,4) by sandwiching the tube (2) with a semicircular concave portion (5,6) (3,4). According to the above-described method, it is not necessary to squeeze and fill earth and sand to the lower side of the pipe (2) that fills the pipe groove (1), and the work of backfilling the pipe groove (1) is omitted. You.

[0004]

However, in the above method, the pipe (2) is not a flexible pipe, and the blocks (3, 4) also have no flexibility, so that the pipe can be easily bent at the site. In addition, there is a problem that it is necessary to prepare various types of pipes and blocks bent in advance with various curvatures.

[0005]

Means for Solving the Problems As a means for solving the above-mentioned conventional problems, the present invention provides bent grooves (14, 1
5) is formed of a flexible tubular body (11) having a substantially rectangular cross section and covering a plurality of flexible tubes (16) converged by a nozzle (17) . there is provided coating equipment of the flexible tube (16) to (10), the cylindrical body (11, 11A) is a synthetic resin foam as a material, the frame forming a tubular body (11A) Body (12
A, 13A) are solid inside and have a predetermined number of flexible tube fitting grooves (12B, 13A).
It is desirable to form B). The flexible tube is covered plurality of flexible tubes which condensed <br/> bundle (16) by the pipe base (17) (1
A piping method is provided in which the covering tool (10, 10A ) of 6) is installed at the bottom of the piping groove (31), and then the piping groove (31) is backfilled.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a tubular body (11) of a covering (10) of the present invention has a frame (12, 13) having a substantially U-shaped cross section.
Therefore, when the frame bodies (12, 13) are combined, the cylindrical main body (11) becomes substantially rectangular in cross section. As shown in FIG. 2, a large number of bent grooves (14, 15) having a V-shaped cross section are formed in the plane of the frame (12, 13) over the entire width to provide flexibility . The bent grooves (14, 15) have a predetermined depth d and a predetermined outermost width W as shown in FIG. 3, and if the depth d and the outermost width W are large, the frame body The radius of curvature of the (12,13) bend also becomes smaller. The depth d is set, for example, in the range of 10 to 20 mm, the outermost width W is set, for example, in the range of 1.0 to 2.0 mm, and the pitch of the bent grooves (14, 15) is set, for example, in the range of 30 to 40 mm. Is set to In the present invention, the cross-sectional shapes of the bent grooves (14, 15) include all shapes other than the V-shape, such as a U-shape and a U-shape, which give the cladding tube a bendability.

The covering device (10) is, for example, polyethylene,
It is desirable to use a synthetic resin foam such as polypropylene, polystyrene, polyvinyl chloride, and polyurethane as the material. 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, for example, a two-piece flexible tube focused by a nozzle 17.
(16) is coated. The flexible tube (16) is made of, for example, polyvinyl chloride, polyethylene, polypropylene, polystyrene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, acrylonitrile-butadiene-styrene copolymer, acrylonitrile-butadiene copolymer, etc. And a cable such as a power line, a communication line, or an optical fiber is inserted therein. As shown in FIGS. 6 and 7, the nozzle (17) is provided with a semicircular tube support (20, 21) from the mating surface of the pair of upper and lower divisions (18, 19). Hooks (22, 23) are inserted at one end of the dividing portions (18, 19), and the hooks (22, 2) are attached to the other end.
3) is engaged with the engaging portions (24, 25), the pair of divided portions (18, 19) are overlapped, and the hooks (22, 23) are respectively engaged with the engaging portions (24, 25). Then, both ends are fixed by screws (26, 27) to form a nozzle (17). And the pipe fitting portion (28, 28) by the pair of divided portions (18, 19)
Are formed, and a plurality of (two) flexible tubes (16) are fixed and focused on the tube fitting portions (28, 28). The nozzle (17) is the two flexible tubes
A rubber ring (29) is attached to each end of the flexible tube (16) at one end as shown in FIG.
Is attached, and as shown in FIG.
The pipe couplings (28, 28) of (17) have cylindrical couplings respectively.
(30) is attached. The coupling (30) may be integrally provided at the end of the flexible tube (16) as shown in FIG.
When the two flexible tubes (16) thus bundled by the nozzle (17) are covered with the tubular body (11), the lower frame (13) ) Two flexible tubes focused on
(16), and then the frame (12) on the lower frame (13)
Are mounted, and the upper and lower frames (12, 13) are fixed by, for example, adhesion, welding, a band, or the like to form a covering (10). One unit of the two flexible tubes (16) thus bundled is covered with, for example, four covering members (10), and as shown in FIG.
The flexible tube (16) is connected to the other end of the flexible tube (16).
The units are connected to each other by being fitted to 0). Then, as shown in FIG. 12, in the portion of the bent pipe in the vertical direction, the flexible pipe (16) is bent at a predetermined curvature, and the cover (10) is also bent at a predetermined curvature through the bending grooves (14, 15). Bend. When the depth d of the bent grooves (14, 15) shown in FIG. 3 is 15 mm, the outermost width W is 1.5 mm, and the pitch of the bent grooves is 35 mm, the radius of curvature R is 2 m. Excessive bending of the flexible tube (16) is restricted by the covering device (10), and the flexible tube (1) is bent.
6) can be in a state substantially along the bend of the covering device (10). Normally, an air gun is used to pass a cable through the flexible tube (16), but when the flexible tube (16) is protruding, an air gun is used by the inner wall of the flexible tube (16). The traffic line is interfered and interferes with the traffic line. However, when the inside of the flexible tube (16) is regulated by the covering device (10) of the present invention as described above, the passage through the air gun becomes easy.

[0009] As described above, the covering tool is provided in the pipe groove (31).
After piping the flexible pipes (16) covered by (10) side by side, as shown in FIG. 11, for example, earth and sand (33) is discharged from a nozzle (32) to fill the pipe grooves (31). return. The earth and sand (33)
Uses the excavated soil generated when excavating the pipe trench (31),
If a slurry in which excavated soil and cement are dispersed in water is used, compacting for filling is not required.

In the present invention, the flexible tube (16) covered by the covering device (10) may be vertically arranged as shown in FIG. In this case, the pipe can cope with left and right bends. Further, as shown in FIG. 14, a predetermined number of frames (12A, 13A) in which bent grooves (14A, 15A) are formed in the cylindrical body (11A) of the covering tool (10A) of the present invention are solid. The flexible tube fitting grooves (12B, 13B) may be formed. A waveform conforming to the waveform of the flexible tube (16) is formed on the inner periphery of the fitting grooves (12B, 13B).

[0011] Further, the cross-sectional shape of the covering device may be square. When the covering device is formed in a rectangular shape such as a rectangle or a square, it is not necessary to insert earth and sand into the lower side of the bottom surface, and the backfilling operation becomes easier. Further, bent grooves may be provided on both side surfaces of the frame of the covering tool. In this case, the covering can be bent right and left. Further, the frame of the covering tool may be provided with a bent groove on a flat surface and on both side surfaces. In this case, the covering device can be bent up, down, left and right. Further, three or more flexible tubes to be covered with the covering device may be bundled, or a plurality of bundled nozzles may be arranged vertically and / or horizontally. Furthermore, only one flexible tube may be covered with the covering device.

[0012]

In the present invention, according to the present invention can be curved pipe a plurality of flexible tube focused by the nozzle in the pipe groove, moreover since the cross section of the coating device is substantially rectangular, the bottom of the coating tool is When the pipe groove is backfilled, it is not necessary to squeeze it to the lower side of the bottom of the covering device when the pipe groove is backfilled, and the gap between the pipes and the lower side of the pipe are tightly closed.
The labor for filling the sand is eliminated. The backfill work of the piping groove can be extremely easily performed, and the excessive bending of the flexible tube can be restricted by the covering device.

[Brief description of the 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 the nozzle.

FIG. 7 is a cutaway front view of both ends of the nozzle.

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

FIG. 9 is a partial perspective view of the other end of the tube.

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 is a sectional view of a piping groove (horizontal piping).

FIG. 12 is a cross-sectional view illustrating a bent state of a covering device.

FIG. 13 is a sectional view of a pipe groove (vertical pipe).

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

FIG. 15 is a conventional explanatory view.

[Explanation of symbols]

10,10A Cover 11,11A Cylindrical body 12,13,12A, 13A Frame 12B, 13B Flexible tube fitting groove 14,15,14A, 15A Bending groove 16 Flexible tube 17 Stub 31 Pipe groove

──────────────────────────────────────────────────続 き Continuing on the front page (72) Akira Adachi, Inventor Aron Kasei Co., Ltd., 1-74, Funami-cho, Minato-ku, Nagoya, Aichi Prefecture (72) Inventor Tadanobu 1, Funami-cho, Minato-ku, Nagoya, Aichi 74 Aron Kasei Co., Ltd., Technical Research Laboratory (72) Inventor Matsutaro Naito 1 74 Funami-cho, Minato-ku, Nagoya City, Aichi Prefecture 74 Aron Kasei Co., Ltd. Technical Research Laboratory (56) References JP-A-63-1884 (JP, A ) Japanese Utility Model 60-144715 (JP, U) Japanese Utility Model 60-79211 (JP, U) Japanese Utility Model 6-6890 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16L 57/00 F16L 11/11

Claims (3)

(57) [Claims] (1) A plurality of bent grooves are formed on a peripheral surface to provide flexibility.
The cross section consists of a rectangular tubular body, the coating device of the flexible tube, characterized in that covering the plurality of flexible tubes which condensed <br/> flux by the nozzle 2. The tubular body is made of synthetic resin foam ,
Each frame forming the cylindrical body has a solid inside and a predetermined number of frames.
2. The flexible tube covering device according to claim 1, wherein a flexible tube fitting groove is formed. The wherein the nozzle cover member of the flexible tube according to claim 1 or 2 covers the plurality of flexible tubes which were focused by placed on the bottom of the pipe trench, then fill the tubing groove Piping method characterized by returning