JPH1151258A - Corrugate pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily carry out assembly of a corrugate pipe in a short time by using two semicylindrical corrugate sections, in each of which a flange bent orthogonally outward is formed in one end while a fitting part bent U- shapedly outward is formed in the other end part. SOLUTION: In construction of a corrugate pipe to be used for a water passage for irrigation/drainage and the like, two curved semicylindrical steel corrugate sections 5 are used. In each of the corrugate sections 5, a flange 5A bent at right angles outward is formed in one end while a fitting part 5B bent U-shapedly outward is formed on the other end. The bent tip of the fitting part 5B is retracted by a length (l), so that the flange 5A can be easily inserted into the fitting part 5B in assembly of the corrugate pipe. If necessary, a bolt is inserted through the fitting part 5B and the flange 5A is locked by means of a bolt, so that connecting force for the corrugate section 5 can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention does not require the use of bolts and nuts when assembling a corrugated pipe, especially a corrugated pipe. Therefore, the assembling work of the corrugated pipe can be performed easily and in a short time, and furthermore, it can be manufactured. The present invention relates to a corrugated pipe which is inexpensive.

[0002]

2. Description of the Related Art As shown in FIGS. 7 and 8, a corrugated pipe comprises a plurality of corrugated sections 1 (two corrugated pipes in the illustrated corrugated pipe) each formed by corrugating a steel plate. This is a flexible pipe made of pipes connected by nuts 3. When the corrugated pipe configured as described above is buried in the soil, the load and the reaction force are uniformly distributed around the pipe, so that a large proof stress is exerted. Moreover, since the hot-dip galvanization is applied to the front and back surfaces, it has an excellent anticorrosion effect.

Therefore, corrugated pipes are widely used as roads, railways, waterways and passages that cross under embankments, or as waterways for irrigation and drainage.

[0004]

However, the above-mentioned conventional corrugated pipe has the following problems. Although the corrugated sections 1 are all connected by bolts 2 and nuts 3, a large number of bolts 2
And the use of the nut 3, it takes a great deal of time and labor to join. The corrugated pipe shown in FIG. 7 is formed by connecting two semi-cylindrical corrugated sections 1 in a pipe shape. Are combined. Therefore, the number of bolts 2 and nuts 3 becomes enormous. It is necessary to drill a bolt hole in the corrugated section 1, and this drilling operation process requires extra time and cost. As shown in FIGS. 9 and 10, the bolt 2 to be used is tightly attached to the surface of the corrugated section 1.
The lower surface (S) of the head is formed in a curved surface. In addition, as shown in FIG. 11, the washer 4 is similarly bent so as to be in close contact with the surface of the corrugated section 1. Therefore, the manufacturing cost is extra than that of ordinary bolts and washers.

Accordingly, an object of the present invention is to eliminate the need to use bolts and nuts when assembling a corrugated pipe, so that the assembling work of the corrugated pipe can be performed easily and in a short time, and the manufacturing cost can be reduced. An object of the present invention is to provide a corrugated pipe.

[0006]

According to the first aspect of the present invention,
A flange bent at a right angle outward is formed at one end,
A fitting portion bent outward in a U-shape is formed of two semi-cylindrical corrugated sections formed at the other end, and each flange of the two corrugated sections is formed of the two corrugated sections. It is characterized by being fitted to each fitting part.

The invention according to claim 2 comprises an even number of male corrugated sections curved in an arc shape and an even number of female corrugated sections curved in an arc shape and having fitting portions formed at both ends. The both ends of the male corrugated section are fitted in the fitting portions of the female corrugated section.

The invention according to claim 3 comprises a plurality of corrugated sections curved in an arc shape, and a fitting portion is formed at one end of each of the plurality of corrugated sections. It is characterized in that the other end is fitted to the fitting portion.

According to a fourth aspect of the present invention, the fitting portion is formed by bending an end of the corrugated section inward or outward in a U-shape.

[0010]

Next, an embodiment of the corrugated pipe of the present invention will be described with reference to the drawings.

FIG. 1 is a front view showing a method of assembling a corrugated pipe of the present invention according to claim 1, FIG. 2 is a front view showing a corrugated pipe of the present invention according to claim 1, and FIG. FIG. 4 is a front view showing a fitting portion formed outside the corrugated section, and FIG. 5 is a front view showing a fitting portion formed outside the corrugated section. Showing a front view,
FIG. 6 is a front view showing the corrugated pipe according to the third aspect of the present invention.

1 and 2, reference numeral 5 denotes two steel corrugated sections curved in a semi-cylindrical shape. At one end of each of the two corrugated sections 5, a flange 5A bent outward at a right angle is formed, and at the other end,
A fitting portion 5B bent outwardly in a U-shape is formed. The bent front end of the fitting portion 5B is retracted by the length (l). This facilitates insertion of the flange 5A into the fitting portion 5B when assembling the corrugated pipe. Then, each of the flanges 5A of the two corrugated sections 5 is connected to the two corrugated sections 5.
Are fitted to the respective fitting portions 5B.

In order to assemble a corrugated pipe using the corrugated section 5 described above, one of the corrugated sections 5 is moved toward the other corrugated section 5 so that the flange 5A is fitted into the fitting portion 5B as shown in FIG. Move to Thereby, as shown in FIG. 2, the corrugated pipe is assembled without using bolts and nuts.

When a corrugated pipe is buried in the ground to construct a waterway, for example, earth pressure is applied to the corrugated pipe.
It is sufficient that the flange 5A is fitted to the fitting portion 5B, but when a waterway is constructed on the ground, no external pressure is applied, so the bolt is inserted through the fitting portion 5B. A bolt connection for bolting the flange 5A may be applied to further increase the connecting force of the corrugated section 5.

In FIG. 3, reference numeral 6 denotes an even number (two in the illustrated example) of male side corrugated sections curved in an arc shape. Reference numeral 7 denotes an even number (two in the illustrated example) of female-side corrugated sections curved in an arc shape and having fitting portions 7A formed at both ends. Both ends of the male corrugated section 6 are fitted into fitting portions 7A of the female corrugated section 7.

The fitting portion 7A may be formed by bending the end of the female corrugated section 7 outward in a U-shape as shown in FIG. 4, or alternatively, as shown in FIG. It may be formed by bending the end of the corrugated section 7 inward into a U-shape.

To assemble the corrugated pipe by the male and female corrugated sections 6 and 7 described above,
Both ends of the male corrugated section 6 are fitted to the fitting portions 7A of each female corrugated section 7. In order to further increase the coupling force of the corrugated sections 6, 7, the above-described bolt connection may be applied to the fitting portion 7A.

In FIG. 6, reference numeral 8 denotes a plurality (four in the illustrated example) of corrugated sections curved in an arc shape. One end of each corrugated section 8 has a fitting portion 8A
Is formed, and the other end 8 of the adjacent corrugated section 8 is formed.
B is fitted to the fitting portion 8A.

The fitting portion 8A may be formed by bending the end of the corrugated section 8 outwardly in a U-shape, as in the case of FIG. And may be formed by bending it into a U-shape.

To assemble the corrugated pipe with the corrugated section 8, the other end 8B of the corrugated section 8 adjacent to the fitting portion 8A of the corrugated section 8 is fitted. Corrugated section 8
In order to further increase the coupling force, the bolt connection described above may be applied to the fitting portion 8A.

[0021]

As described above, according to the present invention, when assembling a corrugated pipe, a bolt,
Since a nut is not required, a useful effect such that the assembling work of the corrugated pipe can be performed easily and in a short time, and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing a method for assembling a corrugated pipe of the present invention according to claim 1;

FIG. 2 is a front view showing the corrugated pipe according to the first embodiment of the present invention.

FIG. 3 is a front view showing a corrugated pipe of the present invention according to claim 2;

FIG. 4 is a front view showing a fitting portion formed outside a corrugated section.

FIG. 5 is a front view showing a fitting portion formed inside the corrugated section.

FIG. 6 is a front view showing the corrugated pipe according to the third aspect of the present invention.

FIG. 7 is a front view showing a conventional corrugated pipe.

FIG. 8 is a side view showing a coupling portion of a flange.

FIG. 9 is a front view showing a corrugated pipe assembling bolt and nut.

FIG. 10 is a side view showing a corrugated pipe assembling bolt.

FIG. 11 is a front view showing a washer.

[Explanation of symbols]

 1: Corrugated section 2: Bolt 3: Nut 4: Washer 5: Corrugated section 5A: Flange 5B: Fitting section 6: Male corrugated section 7: Female corrugated section 7A: Fitting section 8: Corrugated section 8A: Fitted Part 8B: the other end

Claims (4)

[Claims] 1. A semi-cylindrical corrugated section having a flange bent at a right angle outward and formed at one end and a fitting portion bent at a U-shape outward at the other end. The flange of each of the two corrugated sections is fitted to each of the fitting portions of the two corrugated sections. 2. The male corrugated section comprising an even number of male corrugated sections curved in an arc shape, and an even number of female corrugated sections formed in both ends with fitting portions curved in an arc shape. The both ends of the corrugated pipe are fitted in the fitting part of the female corrugated section. 3. A corrugated section comprising a plurality of corrugated sections curved in an arc shape, a fitting portion is formed at one end of each of the plurality of corrugated sections, and the other end of the adjacent corrugated section is formed by the fitting. Corrugated pipe characterized by being fitted to a part. 4. The fitting portion according to claim 2, wherein the fitting portion is formed by bending an end of the corrugated section inward or outward in a U-shape.
Corrugated pipe as described.