JPH02240494A - Corrugated pipe with joint - Google Patents

Abstract

PURPOSE:To intent excellent connecting work by forming an inserted port in an arrowhead projected shape at one end of a corrugated pipe and forming a socket, which accepts an inserted port and have a rubber ring mounted groove in the inside face of an opening portion, at the other end. CONSTITUTION:An inserted port 3, part of a joint-built-in corrugated pipe 1 and formed in an arrowhead projected shape with enlarged dia. transformation in stage of a reduced-dia. transformed tip 3a in a tapered shaped via a short cylinder portion 2, is provided at one end of a corrugated pipe 1a. For the other end of the corrugated pipe 1a, at the rear part of an opening portion 4 served as the minor dia. for accepting the short cylinder portion 2, a protrusion 5 which is engaged with the stage-like enlarged-dia. portion 3a of the inserted port 3 in an arrowhead projected shape is formed with protruded transformation in the direction of the minor dia. of a pipe wall 1b and on an intermittent basis in a peripheral direction. On the inside face of the opening portion 4. A socket 7 is formed which has a mounted groove 6 for a sealing rubber ring 5. As a result, it is possible to perform certain and easy connection without necessity of other looseness preventing tool.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a corrugated pipe with a joint, and more particularly to a corrugated pipe with a joint used as a cable protection pipe.

[Conventional technology]

Conventionally, two types of corrugated pipes commonly used as cable protection pipes are known: one in which annular irregularities are formed and one in which spiral irregularities are formed.

When connecting these corrugated pipes, as shown in Fig. 7(A), in the case of an annular corrugated pipe A, the other end C6 is inserted into a sleeve-shaped receiving hole B formed at one end. In the case of a spiral corrugated pipe A, one end B is inserted into the other end as shown in Fig. 7 (b). End C2
Insert and connect by screwing.

[Problems with conventional technology]

However, in the case of the connection means shown in FIG. 7(a),
If left as is, there is a risk that the socket will come off when a pulling force is applied, and for this reason, it is necessary to separately install a detachment prevention device F, etc., and this has led to the problem that the number of parts that must be prepared during connection work increases.

On the other hand, in the case of the connection means shown in Fig. 7(b), it is necessary to rotate one of the corrugated pipes around the axis, and there is a problem that rotating a long corrugated pipe is a rather troublesome operation. Ta.

[Problem to be solved by the invention]

The present invention was made in view of the above-mentioned problems, and aims to provide a corrugated pipe with a joint that can be connected quickly, has no fear of separation even when a small amount of pulling force is applied, and has excellent connection workability. It is something that

[Technology that led to solving the problem]

That is, in the corrugated pipe with a joint of the present invention, at one end of the corrugated pipe, the tip is deformed into a tapered shape through a short section, the diameter is expanded in a stepped manner, and the tip is further deformed into a tapered shape to reduce the diameter. An insertion port having a concessional projection shape is integrally formed at the other end of the corrugated tube, and an insertion port having the concessionary projection shape is formed at the other end of the corrugated pipe at the back of an opening with an inner diameter that receives the short cylindrical portion. The protrusion that engages with the step-like enlarged diameter portion of the mouth is formed intermittently in the circumferential direction by protruding deformation of the tube wall in the inner diameter direction,
The inner surface of the opening is provided with a socket having a sealing rubber ring mounting groove.

〔Example〕

Next, the present invention will be explained in detail.

FIG. 1 is a partially omitted side view of an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of FIG. 1, and FIG. 3 is a sectional view taken along the line ■-■ of FIG. 2.
FIG. 4 is a sectional view showing the bonded state.

The corrugated pipe 1 with a joint of the present invention has a tip 3A, which has been deformed in a tapered shape through a short cylindrical portion 2, expanded in diameter in a stepped manner at one end of a corrugated pipe LA, and the tip 3B is further deformed in a tapered shape. Socket 3 that has an arrowhead-shaped projection shape by reducing its diameter.
On the other hand, at the other end of the corrugated pipe IA, there is a stepped enlarged diameter part 3A of the insertion port 3 which has a concave projection shape and is located at the back of the opening 4 which has an inner diameter for receiving the short cylindrical part 2. As shown in FIG.
A receiving lower having a sealing rubber ring 5 mounting groove 6 is formed on the inner surface.

As shown in FIG. 3, the circumferential cross-section of the protrusion 5 is, for example, a triangular cross-sectional protrusion, and the axial cross-section is a stepped portion 3 of which one side is a concession-shaped socket 3, as shown in the second FEl.
The inclined side 5B on which A' slides is configured such that the other surface forms a retaining step 5A for the step 3A'.

In the above embodiment, the protrusions 5 in the inner radial direction on the inner surface of the receiving lower are arranged circumferentially with gaps, but the invention is not limited to this.As shown in FIG. (rj
In the example shown in FIG.

Alternatively, the opening end 3B of the socket 3 may be curved in the outer diameter direction as shown in FIG. 6.

In this case, it is convenient because there is no catch on cables etc. that are inserted inside after joining.

Then, to make the connection, insert the socket 3 into the receiving lower as shown in Fig. 4, press firmly in the axial direction, and press each step 3A.
', 5 are engaged.

[Effect]

The corrugated pipe 1 with a joint of the present invention has a protrusion 5 formed on the inner surface of the lower receiving part that engages with the step 3A'' on the outer surface of the insertion port 3, and this protrusion 5 has a shape that can be easily deformed. , the protrusion 5 is caused by the tapered surface of the insertion port 3 due to the pressure when pushing in.
deforms in the radial direction and returns to its original shape when it passes over the stepped portion 3A', so that the stepped portions 3A' and 5A are engaged and connected in a state where it is difficult to separate them.

〔effect〕

As explained above, this invention makes use of the elasticity of corrugated pipes to engage and connect the stepped portions formed on these pipes, so that the connection can be made reliably without the need for any other detachment prevention device, and the connection work can be improved. It is easy to connect simply by pressing in the axial direction, and has various effects.

[Brief explanation of drawings]

FIG. 1 is a partially omitted side view of an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of FIG. 1, and FIG. 3 is a sectional view taken along the line ■-■ of FIG. 2.
4 is a cross-sectional view showing the bonded state, FIG. 5 is a cross-sectional view of another embodiment, FIG. 6 is a cross-sectional view of a main part of another embodiment, and FIG.
Figures (a) and (b) are:

Claims (2)

[Claims] (1) At one end of the corrugated pipe, the tip is tapered through a short cylindrical part, the diameter is expanded in a step-like manner, and the tip is further deformed into a tapered shape to reduce the diameter. On the other hand, at the other end of the corrugated tube, there is a step-like enlarged diameter of the socket having an arrowhead-like projection shape at the back of the opening whose inner diameter is to receive the short cylindrical part. The protrusion that engages with the opening is formed intermittently in the circumferential direction by protruding deformation in the inner diameter direction of the tube wall, and the inner surface of the opening is provided with a socket having a groove for installing a rubber ring for sealing. A corrugated pipe with a fitting featuring the following. (2) A corrugated pipe with a joint according to claim 1, wherein the tip of the insertion port is curved in the outer diameter direction.