JPH0645751Y2 - Corrugated pipe fittings - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a joint for corrugated pipes, and more specifically, it has spiral irregularities in the circumferential direction of the pipe, and is a protective pipe for power cables, water and sewer pipes,
The present invention relates to corrugated pipe joints used as water collection and distribution pipes and irrigation water pipes.

[Conventional technology]

Conventionally, as a joint for this type of corrugated pipe, there has been
As disclosed in Japanese Unexamined Patent Publication No. 33084, a main body portion that is inserted into the groove portion between the mountain portions of the corrugated tube and a protrusion that laterally protrudes from the upper surface of the main body portion and covers the upper surface of the mountain portion is provided. A waterproofing material having the same is provided.

[Problems to be solved by the device]

In the case of the above-mentioned conventional joint, when the water stop material is wound around the outer periphery of the joint portion of the corrugated pipe, the projection portions of the water stop material are simply butted together, and the projection portions are superposed. Since it is not, the fluid in the pipe may leak from the joint. That is, when the protrusions of the water stopper are only abutted on the upper surface of the mountain portion, the corrugated pipe is curved or a gap is generated between the abutted protrusions when the corrugated pipe is pulled in the axial direction, The fluid in the pipe may leak through the gap.

The present invention solves the above-mentioned conventional drawbacks, and can certainly seal, and by fitting the projection of the connector into the recess on the outer circumference of the pipe and winding and tightening the strips so that they overlap each other, The purpose of the present invention is to provide a joint for a corrugated pipe in which is securely connected and is prevented from coming out.

[Means for Solving the Problems]

The joint of the corrugated pipe according to the present invention is such that two pipes having spiral irregularities in the circumferential direction are butted against each other at the joint end portions of the pipes so that the concavo-convex pitches are matched, and a connector is wound around the outer periphery of the joint. Tighten. The connector has a longitudinal strip formed of a flexible material at a substantially central portion thereof and a longitudinal ridge and lap portions on both sides of the ridge, and one lap portion of the lap portion is overlapped with the other lap portion. It is configured to have a concave groove portion. The ridge of this connector is fitted in the recess of the pipe, and the lap portions are overlapped and wound around the joint portion of the pipe, and a sheet is further wound around the outer periphery and fixed.

[Function of device]

According to the present invention, the protrusion of the connector fits into the recess of the pipe on the outer peripheral surface of the joint of the pipe. The band-shaped body of this connector is overlapped over the outer peripheral surface of the joint portion of the pipe, and the outer periphery thereof is wound and fastened by a sheet, so that the outer peripheral surface of the pipe is pressed and the lap portions are overlapped with each other and wound. It is attached and fixed.

〔Example〕

Next, an embodiment will be described with reference to FIGS.

FIG. 1 is a partially cut side view showing a connected state, FIG. 2 is an enlarged sectional view of a part of the connected state, and FIG. 3 is a perspective view of a connecting tool.

As shown in FIGS. 1 and 2, the joint of the present invention connects two pipes 1 and 2 each having a spiral concave portion 3 and a convex portion 4 in the circumferential direction. 1 and 2 are cut and abutted so that the pitches of the concave portions 3 and the convex portions 4 match at the joint end portions. A connector 5 is wound around the outer circumference of the joint between the two pipes 1 and 2. The connector 5 is made of a flexible material such as soft synthetic resin, and as shown in FIG. 3, a hollow ridge 7 is provided in the longitudinal direction at a substantially central portion of the long strip 6. The ridge 7 is illustrated as having a cross-sectional shape that is substantially the same as the cross-sectional shape of the recess 3 of the tubes 1 and 2, but is not limited to the illustrated shape as long as it is a cross-sectional shape that fits into the recess 3. Further, lap portions 14 and 15 which are overlapped with each other are formed on both sides of the strip-shaped body 6,
The wrap portion 14 on the one side is provided with a locking projection edge 8 projecting in the direction of the projection 7, and the wrap portion 15 on the other side is provided with a locking projection edge 9 projecting in the direction opposite to the projection 7. A wire 10 is embedded in both the locking projecting edges 8 and 9, and a shallow recessed groove portion 11 is provided in one lap portion 15, and the other lap portion 14 is superposed on the recessed groove portion 11. It is like this. With such a connection tool, when it is wound so as to overlap it,
The lap portion 14 of the wrap portion 15 provided on one side of the belt-like body 6 is brought into contact with the lap portion 14 on the other side so that the overlapped portion is not bulky, and the locking projections 8 and 9 are engaged with each other. It is also possible to stack them. The ridges 7 of the connector 5 are connected to the recesses 3 of the pipes 1 and 2.
Each of the wrap portions 14 of the strip-shaped body 6,
It is wound around the outer circumference of the joint between the pipes 1 and 2 so that 15 overlap each other. When the connection tool 5 is tightened in this manner, the ridges 7 of the connection tool 5 fit into the recesses of the tubes 1 and 2 on the outer surfaces of the joints of the tubes 1 and 2. Further, the strip-shaped body 6 of the connector 5 overlaps the two pipes 1 and 2 and is in close contact with the outer peripheral surfaces thereof, and at the same time, the strip-shaped bodies 6 are in close contact with each other.

It is preferable to interpose an adhesive between the pipes 1 and 2 and the connection tool 5 or between the respective lap portions when the connection tool 5 is tightened, because the adhesive is more firmly adhered. Also, the connection tool 5
When the ridge 7 is filled with the filler 12 such as synthetic resin, the sealing effect can be further enhanced.

After the connection tool 5 is wound and tightened, the sheet 13 is further wound around the outer circumference thereof. The sheet 13 is made of, for example, rubber or an elastomer member, and when the sheet 13 is wound, the ridge 7 is pressed into contact with the recess, and the lap portions 14 and 15 are overlapped with each other and fixed by tightening. Will be able to endure even more.

[Effect of device]

As described above, according to the present invention, the projection of the connector is fitted into the recess of the pipe and press-contacted, and the lap portion of the band extends over the outer peripheral surface of the connection portion of the pipe and is tightly overlapped and fixed by tightening. As a result, the corrugated pipe joint has various effects such as a reliable seal, no risk of water leakage, and tight connection of the pipe without withdrawal.

[Brief description of drawings]

FIG. 1 is a partially cut side view showing a connected state, FIG. 2 is an enlarged sectional view of a part of the connected state, and FIG. 3 is a perspective view of a connecting tool. In the figure, 1 and 2 are tubes, 3 are concave parts, 4 are convex parts, 5 is a connecting tool,
6 is a belt-shaped body, 7 is a ridge, 11 is a groove, and 14 and 15 are laps.

Claims (1)

[Scope of utility model registration request] 1. A joint for connecting two pipes having spiral irregularities in the circumferential direction so that the joint ends of the pipes are abutted with each other so that the concavo-convex pitches are matched, and then a connector is wound around the outer periphery of the joint. The connection tool has a longitudinal strip and a lap portion on both sides of the strip at a substantially central portion of a long strip made of a flexible material, and the wrap portion on one side thereof Is provided with a recessed groove portion on which the lap portion on the other side is overlapped, the projection of the connector is fitted into the recess of the pipe, and the lap portions are overlapped and wound around the joint portion of the pipe. Tighten
Further, a corrugated pipe joint characterized in that a sheet is wound around the outer periphery and fixed.