JPH09264457A - Corrugated pipe bundling structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the burying work of plural corrugated pipes usefull as a protection pipe under the ground for a cable. SOLUTION: The entering of an earth and sand is prevented by mutually contacting and collecting the projection parts 3A of plural corrugated pipes 1 and filling the mutual clearance of the corrugated pipes 1 by spacers 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated tube focusing structure used as a protection tube when a cable such as an electric wire or a communication line is buried underground.

[0002]

2. Description of the Related Art Conventionally, as a protective tube for a cable, FIG.
A corrugated tube (11) as shown in Figure 1 is used. The corrugated tube (1
1) has a large number of protrusions (13A) formed along the axial direction on the circumferential surface of the pipe body (12) through valleys (13B) so that the rib effect of the protrusions (13A) can withstand earth pressure. It is the one. The corrugated pipe (11) is a multi-row pipe base (1) to facilitate underground piping.
Focused by 5).

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
When converging by (15), a gap is formed between the corrugated pipes (11), and when filling the corrugated pipes (11), it is necessary to carry out a laborious work such as tamping to fill the gaps with earth and sand. Also, when excavating, it took a great deal of time to remove the earth and sand filled in the gap.

[0004]

Means for Solving the Problems As a means for solving the above-mentioned conventional problems, the present invention provides a convex portion (3A) along an axial direction on a peripheral surface of a pipe body (2) via a valley portion (3B). ) Are formed on the corrugated tube (1) so that the convex portions (3A) of the corrugated tube (1) are brought into contact with each other to converge a plurality of vertical and horizontal lines, and the convex portion (3A) and the valley portion of the corrugated tube (1) are converged. (3
Convex part (5A) and valley part (5A) that fill the mutual gap of (B)
The present invention provides a corrugated tube focusing structure in which spacers (5) which are alternately connected to B) or spacers which fill the mutual gap of the valleys (3B) are interposed between the corrugated tubes (1). A desirable corrugated tube (1) in the above corrugated tube focusing structure is one in which the outer periphery of the convex portion (3A) has a quadrangle.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS. In the corrugated pipe (1) shown in the figure, (2) is a pipe main body with a circular cross section, and the peripheral surface of the pipe main body (2) is axially aligned with each corner via valleys (3B). A large number of convex portions (3A) having a square outer periphery with chamfered corners are formed. An inner pipe (4) having a circular cross section is inserted inside the pipe body (2) so as to be in close contact with the pipe body (2), and the inner pipe (4) is a convex portion () of the pipe body (2). 3
It may be fused with the tube body (2) at the valley portion (3B) between A).

In the corrugated pipe (1) having the above structure, the outer periphery of the convex portion (3A) is a corner chamfered quadrangle, and therefore the ground G
It can be installed stably without rolling up, and when converging multiple corrugated pipes (1), as shown in Fig. 4, the corrugated pipes (1) and the sides of the convex portions (3A) between them should be aligned. By abutting the sides, stacking and focusing can be performed without a nozzle.

A spacer (5) is interposed between the corrugated tubes (1) thus stacked and focused. The spacer (5) is made of plastic foam such as polystyrene foam or polypropylene foam, and as shown in FIG. 6, the convex portion (3A) of the corrugated tube (1) is a convex portion that fills the gap between the corner chamfered portions. The part filling part (5A) and the valley part filling part (5B) for filling the mutual gap of the valley part (3B) are alternately connected, and as shown in FIG. 4, the spacer (5) is corrugated. Filling portion (5A) of the convex portion of the spacer (5) with the tube (1) interposed between them.
Fills the mutual gaps of the convex portions (3A) of the corrugated pipe (1), and the valley filling portions (5B) of the spacer (5) fill the mutual gaps of the valley portions (3B) of the corrugated pipe (1). . If desired, a belt (6) is wound around the converging body of the corrugated tube (1) to bind the corrugated tube (1), but the belt is not essential in the present invention.

In the present invention, the gap between the corrugated pipes (1) thus stacked and focused is filled with the spacer (5), so that the gap between the corrugated pipes (1) is filled with earth and sand, or There is no need for laborious work such as removing the earth and sand filled in the gaps of the corrugated pipe (1).

In this example, the convex portion (3A) of the corrugated tube (1)
Since the outer circumference of the corrugated pipe is a square chamfered corner, when the corrugated pipe (1) is buried in the ground, it receives earth pressure perpendicular to the surface at its side, but the pipe main body (2) has a circular cross section. The earth pressure acts in the normal direction, and therefore the corrugated pipe (1) can withstand the earth pressure, but since the inner pipe (4) is inserted inside the pipe body (2), The earth pressure resistance strength of the corrugated pipe (1) is further improved by the inner pipe (4). Further, even if the pipe body (2) of the corrugated pipe (1) is damaged, the intrusion of earth and sand or water is prevented by the inner pipe (4). Further, when inserting a cable into the corrugated pipe (1), the tip of the cable is easily caught by the inner corrugation of the corrugated pipe (1) unless the inner pipe (4) is inserted. However, since the inner pipe (4) hides the inner corrugations, this problem is solved in this example.

Another embodiment of the present invention is shown in FIGS. On the peripheral surface of the pipe body (22) of the corrugated pipe (21) of this specific example, a large number of convex portions (23A) having a circular outer periphery are formed along the axial direction via valley portions (23B). And the corrugated tube (21)
The plurality of strips are brought into contact with the convex portions (23A) so as to be focused, and a spacer (25) is interposed between the corrugated tubes (21). As shown in FIG. 8, the spacer (25) has a structure in which a convex portion filling portion (25A) and a valley portion filling portion (25B) are connected to each other.

9 and 10 show another embodiment of the present invention. On the peripheral surface of the pipe body (32) of the corrugated pipe (31) of this specific example, a large number of convex portions (33A) having a quadrangular outer circumference are formed along the axial direction with valley portions (33B) interposed. The corrugated tube (3
The multiple lines of 1) bring the sides of the convex portion (33A) into contact with each other to converge, but since the outer periphery of the convex portion (33A) is a quadrangle with no chamfered corners, the convex portion (33A) Since there is no mutual gap,
Spacers (35) as shown in FIG. 10 are filled only in the mutual gaps of the valleys (33B).

[0012]

According to the present invention, a corrugated tube having a plurality of filaments is focused.
Since the mutual gap of (1) is filled with the spacer (5), pipe burying work and excavation work are extremely easy.

[Brief description of drawings]

 1 to 6 show one specific example of the present invention.

FIG. 1 is a partial perspective view of a corrugated tube.

FIG. 2 is a partial cutaway side view of the corrugated pipe.

[Fig. 3] Front view of the installation state of the corrugated pipe

FIG. 4 is a front view of a corrugated tube in a stacked and focused state.

FIG. 5 is a sectional view of a valley portion of a corrugated pipe in a stacking and focusing state.

FIG. 6 is a perspective view of a spacer. FIGS. 7 and 8 show another specific example.

FIG. 7 is a front view of the corrugated tubes in a stacked and focused state.

FIG. 8 is a perspective view of a spacer. FIGS. 9 and 10 show still another specific example.

FIG. 9 is a front view of the corrugated tubes in a stacked and focused state.

FIG. 10 is a perspective view of a spacer.

FIG. 11 is a partial perspective view of a corrugated tube focusing state of a conventional example.

[Explanation of symbols]

 1,21,31 Corrugated tube 2,22,32 Tube body 3A, 23A, 33A Projection 3B, 23B, 33B Valley 5,25,35 Spacer 5A, 25A Projection filling section 5B, 25B Valley filling section

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

Claims (2)

[Claims] 1. A corrugated pipe having a large number of convex portions formed along the axial direction on a peripheral surface of a pipe main body through valleys so that the convex portions of the corrugated pipe are brought into contact with each other to converge a plurality of vertical and horizontal lines. A spacer that alternately connects convex filling portions and valley filling portions that fill the mutual gap between the convex portion and the valley portion of the pipe or a spacer that fills the mutual gap between the valley portions is interposed between the corrugated pipes. Corrugated tube focusing structure characterized by 2. The corrugated tube focusing structure according to claim 1, wherein the convex portion of the corrugated tube has a quadrangular outer circumference.