JPH0622684U - Synthetic resin corrugated pipe - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a corrugated pipe made of synthetic resin, which is unlikely to be deformed or broken at the end of the pipe, can be easily connected to each other in a short time, and is excellent in watertightness of the connection portion. [Structure] A corrugated tube 1 having spirally shaped ridges 2 and valleys 3 alternately has two or more ridges on at least one end of the corrugated pipe 1 and has a synthetic resin band of substantially the same quality as the corrugated pipe 1 on the outer periphery thereof. The body 4 is provided and integrated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a synthetic resin corrugated pipe that is preferably used as a drainage pipe for drainage of roads, residential land, grounds, golf courses, etc., sewage sewage, backwater drainage of structures, slope drainage, etc.

[0002]

[Prior art]

 There have been various types of corrugated pipes made of synthetic resin for a long time, but they are roughly classified into those having alternating peaks and valleys and those having spiral peaks and valleys alternately. There are two types, the former is often a relatively small diameter tube wall that is thin by blow molding, and the latter is a thick wall type that is formed by a winding method.

The so-called spiral corrugated pipe formed by the winding method is usually connected by a socket.

FIG. 2 is a perspective view showing the connection of corrugated pipes using sockets, in which 10 and 11 are corrugated pipes. In this connection structure, the ends of the corrugated pipes 10 and 11 are butted against each other, a soft rubber sheet 13 is wound around the outer periphery of the corrugated pipes 10, and the outside of the corrugated pipes 10 and 11 is covered with a socket 12 made of metal. Bolts are inserted into a plurality of small holes of one flange portion by the flange portions 21 and 21 provided on the first flange portion, and the flange portions 21 and 21 are tightened with nuts inserted into the small holes of the other flange portion. FIG. 3 is a perspective view showing a state in which the corrugated pipes 10 and 11 are thus connected.

[0005]

[Problems to be solved by the device]

 In the above conventional connection structure, since the corrugated pipe end is composed of uneven peaks and troughs, even if a soft rubber sheet is used instead of packing, it is not sufficiently watertight and water leaks easily. was there. In addition, winding a soft sheet around the outer circumference of a corrugated tube having spiral ridges and valleys is very troublesome in actual work. For example, since the soft sheet comes into contact only with the ridges of the pipe, and the ridges have a spiral shape, the sheet cannot be fixed to the pipe, and the sheet is always placed on the ridge. There was a problem that it could hardly serve as packing. Further, the end of the tube is more likely to be deformed than other parts, and the tube opening may not be circular depending on the storage method.

[0006]

[Means for Solving the Problems]

 The synthetic resin corrugated pipe of the present invention has been made in view of the above problem, and has an outer circumference over two or more ridges on at least one end of a corrugated pipe having alternating spiral ridges and valleys. In order to provide a spiral corrugated pipe, which has a band of synthetic resin of substantially the same quality as that of the pipe and is integrated, and which can easily perform the pipe connection which has the above problems. To do.

[0007]

[Action]

 According to the structure of the corrugated pipe made of synthetic resin of the present invention, the corrugated pipe having the spiral ridge portion and the valley portion alternately crosses the outer periphery of the two or more ridge portions on at least one end of the corrugated pipe. Since it is integrated with a strip made of synthetic resin of approximately the same quality as the pipe, the pipe end is reinforced, and the pipe end has a smooth outer periphery with no irregularities, so a soft sheet from above the strip. If a flexible sheet is closely attached to the entire strip, the watertightness is greatly improved by winding the strips on top of each other and connecting the pipes using sockets. Furthermore, the presence of the band prevents the soft sheet from falling into the valley portion, allows the soft sheet to be easily wound, and allows the connection work to be easily performed, which leads to improvement in workability and reduction in work time. Also, since the load applied to the ridges at the pipe end is distributed to several ridges by the strip, it is difficult to deform when a large load is applied to the pipe end, and the impact strength becomes large.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a partial cutaway sectional view showing an embodiment of a synthetic resin corrugated tube of the present invention.

In FIG. 1, reference numeral 1 denotes a synthetic resin corrugated pipe made of a thermoplastic synthetic resin such as high-density polyethylene or polyvinyl chloride, which is made by a known manufacturing method. Therefore, 2 is a mountain portion and 3 is a valley portion. The corrugated pipe is also made smooth by the inner wall 5 on the inner surface of the pipe. The crests 2 and the troughs 3 are alternately and spirally formed, and a strip 4 is heat-sealed to the crests 2 at the end of the tube 1. The strip 4 covers the outer periphery of the peak portion 2 with a width of at least two peaks. The outer periphery of the mountain portion 2 and the band 4 are heat-sealed or completely adhered with an adhesive, and the both are integrated.

The band 4 has a thickness of 1 to 10 mm and is made of various synthetic resins such as polyethylene and polyvinyl chloride. The thickness of the band 4 varies depending on the size of the corrugated tube body. If the diameter of the tube is about 200 mm, the thickness may be about 1 mm. If the diameter of the tube is 1000 to 1500 mm, it is 7 to 7. A strip 4 with a thickness of 10 mm is required. The band 4 may be formed by forming a tubular body in advance and cutting it into slices for use. However, in the case of a large diameter, the sheet is wound around a corrugated pipe and integrated by heat fusion or bonding. When forming a tubular body by blow molding or the like and cutting it into strips, and making it into the band body 4, make the inner diameter slightly larger than the outer diameter of the corrugated pipe crest portion 2, and then form the corrugated pipe. The ridge portion 2 may be inserted into the band body 4, the band body 4 may be heated, the tube body may be contracted, and the ridge portion 2 may be closely attached. In this case, it is desirable to apply an adhesive or the like to the outer periphery of the mountain portion 2.

In the case of a large-diameter corrugated pipe, the corrugated pipe itself is maintained at a high temperature during the production of the corrugated pipe, or the band 4 is melted when it is manufactured by extrusion molding, or the corrugated pipe is also a band. Can also be integrated by heat-sealing both when manufacturing both.

In the present invention, the term “more than two ridges 2” of the corrugated tube means that the band 4 is required to be completely covered by at least two ridges of the spiral ridge. . If the band 4 is fused only to one mountain, tilting becomes unstable when the part of the band 4 that touches the valley is pushed. That is, if the strip 4 is integrated over the outer periphery of the mountain portion over several mountains, the strip 4 will not become unstable.

The corrugated pipes having the strip 4 of the present invention are connected to each other as follows. Fill the opening in the mountain portion of the pipe end with a filler such as a sealant. Similarly, the filling material is also sufficiently filled between the valley and the strip 4. A packing is placed between the end faces of the two abutted corrugated pipes, and a sheet material such as soft rubber that wraps the strips 4 at both pipe ends is wrapped around the strips 4. The sheet material is adhered to the strip 4 via an adhesive having an epoxy diameter, and the outer end of the sheet material is firmly fixed by using a metal socket or the like. In this way, the watertightness is good and the working time is much faster than the conventional one, so the construction period can be shortened.

As described above, the corrugated pipes can be easily connected to each other when the strips 4 are integrally provided at both ends of the corrugated pipe. The band is not always used, and the band is provided and integrated at one end, but the band is often not present at the other end when the pipe is cut midway. However, if the strip 4 is provided on at least one end of the corrugated tube, connection of a part of the strip 4 can be made extremely easy because of the presence of the strip 4. In this case, the other end of the pipe can be connected relatively easily by using a spiral pipe joint (not shown) or the like. That is, when the end of the corrugated pipe is spiral, a spiral joint that can be fitted into the spiral is formed in advance, and a sealing material or an adhesive or the like is inserted and attached. At this time, the joint may be rotated like a screw with respect to the corrugated pipe. However, if another corrugated tube is connected to one of the fittings, the corrugated tube with the fitting is too heavy to rotate. Therefore, the other end of the joint is made cylindrical, and the corrugated pipe of the present invention equipped with a band is inserted and connected to the cylindrical body with a packing, a sealant or the like interposed.

[0016]

[Effect of device]

 As is clear from the above description, the synthetic resin corrugated pipe of the present invention has the advantage that the end portion of the pipe is reinforced by the band, so that the end portion is not easily deformed and is not easily destroyed by impact. Have. Also, since the strip is integrally provided at the end of the pipe, the pipes can be connected easily and in a short time, and at the same time, the watertightness is significantly improved. And, especially in a large-diameter drain pipe, the present invention has a greater effect than expected.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view showing an essential part of an embodiment of the present invention.

FIG. 2 is a perspective view showing the connection of a conventional corrugated pipe.

FIG. 3 is a perspective view showing a state in which a conventional corrugated tube is connected.

[Explanation of symbols]

 1 Corrugated pipe 2 Mountain part 3 Valley part 4 Band

Claims (1)

[Scope of utility model registration request] 1. A strip made of a synthetic resin having substantially the same quality as the outer periphery of a corrugated pipe having at least one end of a corrugated pipe which has spiral ridges and valleys alternately. A corrugated pipe made of synthetic resin, characterized by being integrated with.