JP2002356868A - Flexible joint tightening band for wavy pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible joint tightening band for a wavy pipe capable of making a water non leaking connection even though a displacement occurs at a connecting portion. SOLUTION: This is a flexible joint tightening band for the wavy pipe having a slide portion 2 at one end portion of the center flat portion and a plurality of ribs with slits bent inwardly at both the side portions except the slide portion, and this band is equipped with a tightening bolt 7 inserted to guides each having a movable angle at both the end portions. By using this tightening band, wavy embedding pipes such as ribbed vinyl chloride pipes and corrugated polyethylene pipes can be connected with flexible joints, and tightening and connecting to the crest of the wavy pipe can be achieved definitely and accurately without any deviation of pipe position and any trouble such as water leakage due to settlement or the like can be prevented after the work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to rib pipes, corrugated pipes, etc. (hereinafter referred to as corrugated pipes) and structures used as pipes for water supply and sewerage, and information lines such as electric wires and communication lines. The present invention relates to a flexible joint tightening band used for connection of a cable.

[0002]

2. Description of the Related Art In recent years, due to the expansion of water and sewage systems and the increase of underground wiring such as electric wires and communication lines, ceramic pipes such as fume pipes, porcelain pipes, ceramic pipes such as ceramic pipes, polyvinyl chloride pipes, and polyethylene pipes have been used. The use of corrugated tubes with plastic tubes is increasing.

[0003] In these corrugated pipes, a handhole,
For connection with structures such as manholes, rubber or plastic flexible joints have recently been recommended and used for the purpose of improving water resistance and earthquake resistance.

[0004]

However, in the use of a conventional flat belt type flexible joint tightening band which is effective for a pipe having a smooth surface such as a conventional vinyl chloride pipe, a corrugated pipe peak and a valley are effectively tightened. It is difficult to use a rubber sponge, caulking material, etc., and cannot withstand high water pressure. Can not do. For this reason, a mounting structure and the like in Utility Model Publication No. 3061584 and the like have been proposed, but a satisfactory structure has not always been obtained.

The present invention is intended to solve such a problem. Even when displacement occurs in a connection portion due to uneven settlement of a structure and a buried pipe, a flexible joint between a corrugated pipe and the structure is provided. The object of the present invention is to provide a flexible joint tightening band for corrugated pipes, which can be connected without risk of water leakage by the connection using the cable.

[0006]

SUMMARY OF THE INVENTION The present invention has a center flat portion having a slide portion at one end and a plurality of slit ribs bent inward on both sides except the slide portion, and an angle movable guide at both ends. This is a flexible joint tightening band for a corrugated pipe (hereinafter, referred to as a final tightening band) provided with a tightening bolt passing therethrough.

[0007] By using a final tightening band, when a corrugated buried pipe such as a vinyl chloride rib pipe or a corrugated pipe made of polyethylene or the like is connected to a submerged structure such as a manhole by a flexible joint, the corrugated pipe is connected to the corrugated pipe. Tightening and connection to the mountain are performed reliably and accurately, and the pipe position shift after construction,
No problems such as water leakage due to settlement etc. occur.

The width of the flat portion of the final tightening band is not particularly limited as long as it is substantially the same as the width of the peak portion of the corrugated tube to be used, but the top shape of the plurality of slit ribs bent inward on both sides. The semi-circular or elliptical shape is desirable from the viewpoint of safety during handling and the effect of tightening the corrugated tube. The slit of the rib is not particularly limited, but generally about 1 to 5 mm can be generally applied in terms of the manufacturing surface such as machining and the fastening effect. Further, the size of the rib is not particularly limited, but is 1 / (1/1) of the width of the central flat portion.
The effect of the present invention is exhibited at about 2/3. The angle of inward folding can be varied according to the shape of the peak of the corrugated pipe if the tightening effect can be exhibited without damaging the surface of the flexible joint at the time of tightening.
A degree is effective.

The tightening bolt has a bolt through hole at the top provided at both ends of the final tightening band excluding the slide portion,
It is desirable that an angle movable guide supported by bolts and nuts be passed through the two fixed plates, and the connection and tightening of the flexible joint of the final tightening band and the corrugated pipe be performed easily and securely by tightening the bolts and nuts. It is possible to do. It is also useful for the effects of the present invention to use two or more so-called double nuts to prevent loosening and misalignment of the nuts used for the tightening bolts after tightening.

Since the fastening band is usually used for a long time to connect a corrugated pipe for underground burial and a structure, it is desirable that the band is made of stainless steel or a metal such as rust-proof iron or steel. It is preferable from the viewpoint of exhibiting a tightening effect.

[0011]

The present invention will be described below in more detail with reference to examples. Example 1 In the information box made of reinforced concrete shown in FIG.
m) Flexible joint 15 (CRK Holtite LP25)
0) was set by the extension band 16, and the inner diameter was 330 mm, the flat part width was 35 mm, and the slit width was 2 on both sides shown in FIG.
mm, 50 mm top radius 10 mm with an inner bending angle of 40 degrees
A polyethylene crimped pipe 14 having a nominal diameter of 250 with a final tightening band 17 equipped with stainless steel bolts having a diameter of 10 mm and a length of 180 mm through a semicircular rib and a movable guide
(Toyo Chemical Co., Ltd. Polytec) connected to the mountain, nut 8
And tightened enough. After sealing the end of the corrugated pipe with a steel plate 18, a water stop tester 19 was set on the outer surface of the information box, water was injected therein, pressurized at 0.05 MPa, and held for one month. I was not able to admit.

Example 2 A water stoppage test was carried out in the same manner as in Example 1, and a water pressure of 0.
The corrugated pipe was displaced upward and downward by an angle of 1 degree while maintaining the pressurized state at 05 MPa, and was held for 5 minutes each, but no water leakage was observed. Further, while maintaining the same hydraulic pressure, the corrugated pipe was pushed back and forth by 75 mm each in the pipe axis direction by the jack 20, and was pushed out and held for 5 minutes, but no water leakage was observed.

[0013]

As shown in Examples 1 and 2,
The fastening band according to the present invention is used for connecting a flexible joint between a corrugated pipe and a structure, thereby providing an extremely excellent corrugated pipe fastening that does not have a long-term risk of water leakage even when the pipe is displaced due to an angle, a displacement, or the like. It is a band.

[0014]

[Brief description of the drawings]

FIG. 1 is a schematic view of a tightening band for a corrugated pipe according to the present invention.

FIG. 2 is a schematic view of a tightening band and an angle movable guide portion of the present invention.

FIG. 3 shows a schematic diagram of a connection state using a flexible joint of an information box and a corrugated pipe and a fastening band of the present invention, and a water stoppage test.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tightening band flat part of this invention 2 Tightening band slide part 3 Rib of both sides 4 Slit between ribs 5 Angle movable guide 6 Fixed plate of angle movable guide 7 Tightening bolt 8 Nut of tightening bolt 9 Inner bending angle of rib 10 Angle Bolt through hole at top of movable guide 11 Angle movable guide support bolt 12 Angle movable guide nut 13 Information box side wall 14 Corrugated pipe 15 Flexible joint 16 Flexible joint expansion band 17 Tightening band 18 Corrugated pipe end mouth sealing Plate 19 Water stop tester 20 Jack

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Akio Hunagawa 306 Koyagi-cho, Takasaki-shi, Gunma F-term in CRL Corporation (reference) 2D047 BA27 2D063 DA27 3H017 FA03

Claims (4)

[Claims] 1. A flat central portion has a slide portion at one end and a plurality of inwardly bent slit ribs on both sides excluding the slide portion, and a tightening bolt through which an angle movable guide is provided at both ends. Flexible joint fastening band for corrugated pipes. 2. A plurality of slit ribs having a semicircular or elliptical apex, a bent angle of 30-60 degrees inward, and a slit width of 1-5 mm between the ribs. 2. The method according to claim 1, wherein
Flexible joint tightening band for corrugated pipe as described. 3. The corrugated pipe according to claim 1, wherein the angle-movable guide is a guide having a bolt penetration hole at the top and supported by two fixing plates with bolts and nuts. Flexible joint tightening band. 4. A flexible joint fastening band for a corrugated pipe according to claim 1, wherein the flat portion, the rib, the guide, and the fastening bolt are made of stainless steel or a metal subjected to rustproofing treatment.