JP2002327878A - Coupling structure for synthetic resin corrugated pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To seal-join a synthetic resin corrugated pipe and an other flow passage member by a simple structure. SOLUTION: This coupling structure for the synthetic resin corrugated pipe for joining the synthetic resin corrugated pipe having a plurality of ring-shaped wave parts at substantially equal intervals in a shaft direction of an outer peripheral surface to the other flow passage member has a tubular shape and is constituted of a sleeve having a plurality of projections for being engaged to a trough part of a ring-shaped wave part of the synthetic resin corrugated pipe at substantially equal intervals in a circumferential direction on an inner peripheral surface of the one end opening part and having a mounting part to be mounted sealable at a prescribed portion of the other flow passage member and a ring-shaped elastic member interposed sealable between an internal surface of the sleeve and a trough part of the other ring-shaped wave part of the synthetic resin corrugated pipe facing to the internal surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin corrugated pipe joint structure, and more particularly, to a synthetic resin corrugated pipe having a plurality of annular corrugations at substantially equal intervals in an axial direction of an outer peripheral surface. The present invention relates to a joint structure for a corrugated pipe made of synthetic resin to be joined to the flow path member.

[0002]

2. Description of the Related Art Conventionally, synthetic resin corrugated pipes having excellent pressure resistance have been used as transport pipes installed in buildings, outdoors, underground, and the like for transporting clean water and sewage. However, when joining this synthetic resin corrugated tube to another flow path member such as a mass, use a rubber ring-shaped receptacle, outlet-shaped one, caulking, or use a metal. It is widely used to connect it by inserting it into a hose or the like.

[0003]

However, these conventional joint structures have many problems such as difficulty in connection, difficulty in detachment, and difficulty in recycling due to the use of different materials. Have.

[0004]

According to the present invention, there is provided a synthetic resin corrugated pipe having a plurality of annular corrugations at substantially equal intervals in the axial direction of the outer peripheral surface, for joining a synthetic resin corrugated pipe to another flow path member. A joint structure for a corrugated pipe, wherein a plurality of projections for engaging a valley portion of a pair of adjacent annular corrugations of a synthetic resin corrugated pipe are formed in a circular shape on an inner peripheral surface of an opening at one end thereof. A sleeve having substantially equal intervals in the circumferential direction, and having an attachment portion for sealingly attaching to a predetermined portion of another flow path member at the other end opening portion,
A synthetic resin wave comprising a ring-shaped elastic member inserted between the inner surface of the sleeve and a valley portion of another pair of annular wave portions adjacent to the synthetic resin corrugated tube facing the inner surface in a sealable manner. Provide a joint structure for a pipe.

That is, the present invention comprises a sleeve and a ring-shaped elastic member as main parts for joining a synthetic resin corrugated pipe to another flow path member, and in particular, a sleeve and a synthetic resin corrugated pipe. Are characterized by a seal joint structure that sealably joins the first and second sleeves using a specific protrusion of the sleeve and one or more ring-shaped elastic members. More specifically, a ring-shaped elastic member is fitted in a valley portion of a pair of adjacent annular wave portions of a synthetic resin corrugated tube, and the ring-shaped elastic member is used to connect the synthetic resin corrugated tube and the sleeve. By sealing and positioning the synthetic resin corrugated tube on the sleeve with a specific projection formed on the inner surface of the opening at one end or the other end of the sleeve, the synthetic resin corrugated tube can be easily formed with a simple structure. That is, the pipe and another flow path member can be sealed and joined.

In the present invention, a mounting portion of a sleeve is sealably attached to a predetermined portion of the other flow path member. Specifically, the other flow path member has a receiving portion at the predetermined position, and The inner peripheral surface of the receptacle has a spiral groove.
On the other hand, the sleeve is provided with an insertion portion as an attachment portion at the other end opening portion, and a helical convex which is screwably engaged with the outer peripheral surface of the insertion portion with the helical recess of the receiving portion of the other flow path member. Examples having a ridge can be given. The spiral ridge of the sleeve and / or the helical ridge of the other flow path member may have a small number of helical ridges and / or helical ridges that are screwed to each other before the final stage of each screwing. Providing a protrusion for confirming the completion of tightening while receiving resistance makes it possible to confirm the completion of tightening by a change in the feel when screwing in, thereby facilitating the tightening operation and locking the tightening. It also prevents later falling off, and improves workability. Here, the size of the protruding portion may be the minimum that can obtain a change in feel when screwing, and for example, the spiral convex or the spiral concave has a width of 0.5 to 3.0 mm and a depth of 0.5 to 3.0 mm. : 0.5 to 3.0 mm, the width of the projection is 0.15 to 3.0 mm, and the height is 0.1.
1 to 1.5 mm.

As a material for forming the sleeve and the other flow path member (a receptacle portion), a hard synthetic resin, specifically, a hard material such as an olefin resin, a vinyl chloride resin, or a styrene resin is used. And preferably hard materials such as polyethylene resin and polypropylene resin. The materials constituting the ring-shaped elastic member include styrene butadiene rubber, chloroprene rubber, ethylene propylene diene rubber (EPDM)
And the like, a thermoplastic elastomer, and the like, preferably a thermoplastic elastomer, and more preferably an olefin-based thermoplastic elastomer. In particular, by using a hard polyethylene resin for the sleeve and other flow path members and an olefin-based thermoplastic elastomer for the ring-shaped elastic member, both members can be unified with olefin-based resin, moldability, recyclability, and other physical properties. Is preferred because it can be improved.

According to another aspect of the present invention, there is provided a synthetic resin for joining a synthetic resin corrugated pipe having a plurality of annular corrugations at substantially equal intervals in an axial direction of an outer peripheral surface to another flow path member. A joint structure for a corrugated pipe, the pipe having a plurality of protrusions for engaging a valley portion of a pair of adjacent annular corrugations of a synthetic resin corrugated pipe on the inner peripheral surface of one end opening thereof. A sleeve having substantially equal intervals in the circumferential direction and having an opening at the other end opening,
Another flow path member having a receiving portion for receiving the insertion portion of the sleeve in a sealable manner, an inner surface of the sleeve, and another pair of annular wave portions adjacent to the synthetic resin corrugated tube facing the inner surface. Provided is a joint structure for a corrugated pipe made of synthetic resin, comprising a ring-shaped elastic member interleaved with a valley portion in a sealable manner. Here, the insertion portion of the sleeve has a spiral ridge on its outer peripheral surface, and the receiving portion of the other flow path member has a helical concave portion on its inner peripheral surface, which is screwably engaged with the spiral ridge. Examples are given as being preferred.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a joint structure for a corrugated pipe made of synthetic resin according to the present invention will be described below with reference to the drawings. Note that the present invention is not limited by this. FIG. 1 is a perspective view showing one embodiment of a joint structure for a corrugated pipe made of synthetic resin according to the present invention, and FIG. 2 is an exploded perspective view showing an exploded view of the joint structure for a corrugated pipe made of synthetic resin. )
Shows a relationship between a corrugated pipe as a corrugated pipe made of synthetic resin and a ring-shaped elastic member, (b) shows a state where the ring-shaped elastic member is attached to the corrugated pipe, and (c) shows a state where the ring-shaped elastic member is attached. Shows the relationship between the corrugated pipe and the sleeve,
(D) shows a state where the corrugated pipe with a sleeve is attached to a mass receiving port as another flow path member. FIG. 3 is a sectional view of a joint structure for a corrugated pipe made of synthetic resin.

In FIGS. 1 and 3, a joint structure 1 for a corrugated pipe made of synthetic resin comprises a ring-shaped corrugated portion 2 at substantially equal intervals in the axial direction of the outer peripheral surface.
A hard polyethylene resin sleeve 7 for joining a hard polyethylene resin corrugated pipe 5 having 2, 3, 3, 4,... To a hard polyethylene resin mass 6 as another flow path member; And a ring-shaped elastic member 8 made of a thermoplastic elastomer. The sleeve 7 has a plurality of projections 9... On the inner surface of the opening at one end thereof for locking to the valley between the pair of annular wave portions 3 on the outer peripheral surface of the end of the corrugated tube 5. It is provided at substantially equal intervals in the circumferential direction, and on the outer surface of the opening at the other end, there is provided a socket that can be sealed and inserted into a receiving port (female screw portion as a spiral concave strip) 10 of the mass 6. The mounting screw portion (male screw portion) 11 is provided.

The ring-shaped elastic member 8 is a pair of ring-shaped corrugations 2, 2 adjacent to the inner surface of the sleeve 7 and the outer peripheral surface of the end of the corrugated tube 5 at the other end of each of the projections 9.
It is interposed so as to be sealable between the gaps. The ring-shaped elastic member may be inserted between the inner surface of the sleeve and a pair of adjacent annular wave portions on the outer peripheral surface of the end of the corrugated tube at one end side of each protrusion of the sleeve so as to be sealable. Good. As described above, the joint structure 1 for a corrugated pipe made of synthetic resin is characterized by the structural features of the annular corrugated portions 2, 2, 3, 3, 4,. Protrusion 9
By combining the above structural features, a seal joint structure between the corrugated pipe 5 and the mass 6 can be obtained with a very simple configuration.

Next, a method for obtaining the joint structure 1 having the above configuration will be described. First, in FIGS. 2 (a) and 2 (b), a ring-shaped elastic member 8 is fitted between a pair of adjacent annular corrugated portions 2 on the outer peripheral surface of the end portion of the corrugated tube 5, and then in FIG. Ring-shaped elastic member 8
The corrugated pipe 5 is pushed into the sleeve 7, and each projection 9... Of the sleeve 7 is engaged with a valley between a pair of adjacent annular corrugations 3 on the outer peripheral surface of the end of the corrugated pipe 5. ,
The corrugated pipe 5 and the sleeve 7 are joined. And FIG.
In (d), the mounting screw portion 11 of the sleeve 7 is screwed into the receptacle 10 of the mass 6, thereby joining the mass 6 and the corrugated tube 5 as shown in FIG. FIG. 4 is an enlarged explanatory view of a main part for explaining the relationship between the receiving port of the sleeve and the insertion port of the corrugated pipe. The female screw portion of the receiving port 10 serving as the spiral groove has a small protrusion 16. On the other hand, the mounting screw portion 11 as a helical ridge of the mouth of the sleeve 7 also has a small projection (projection piece) 17. Thus,
4 (a) to FIG.
When screwing into (b), mutual resistance occurs, and the completion of tightening can be confirmed by a change in the feel. In addition, since the fastening is locked, the sleeve is prevented from falling off.

FIG. 5 is a view corresponding to FIG. 1 showing another embodiment. In FIG. 5, reference numeral 12 denotes the entire mass, and the mass 12 has three receiving holes 13.

[0014]

According to the present invention, a ring-shaped elastic member is fitted into a valley portion of a pair of adjacent annular corrugated portions of a synthetic resin corrugated tube, and the synthetic resin corrugated tube and the sleeve are attached to the ring-shaped elastic member. And the synthetic resin corrugated tube is easily positioned with a simple structure by positioning the synthetic resin corrugated tube on the sleeve with a specific projection formed on the inner surface of one end opening of the sleeve. And another flow path member can be sealed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a joint structure for a corrugated pipe made of synthetic resin according to the present invention.

FIG. 2 is an exploded perspective view showing an exploded perspective view of a joint structure for a synthetic resin corrugated pipe, in which (a) shows a relationship between a corrugated pipe as a synthetic resin corrugated pipe and a ring-shaped elastic member;
(B) shows a state where the ring-shaped elastic member is attached to the corrugated tube, (c) shows a relationship between the corrugated tube with the ring-shaped elastic member and the sleeve, and (d) shows a corrugated tube with the sleeve and other flow paths. The place where it attaches to the receiving port of the mass as a road member is shown.

FIG. 3 is a sectional view of a joint structure for a corrugated pipe made of synthetic resin.

FIG. 4 is a main part enlarged explanatory view for explaining a relationship between a receiving port of a sleeve and an insertion port of a corrugated pipe.

FIG. 5 is a view corresponding to FIG. 1, showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joint structure for corrugated pipes made of synthetic resin 2 Ring-shaped wave part 3 Ring-shaped wave part 4 Ring-shaped wave part 5 Corrugated pipe 6 Mass 7 Sleeve 8 Ring-shaped elastic member 9 Projection 10 Receptacle 11 Mounting screw part

Claims (7)

[Claims] 1. A synthetic resin corrugated pipe joint structure for joining a synthetic resin corrugated pipe having a plurality of annular corrugations at substantially equal intervals in an axial direction of an outer peripheral surface to another flow path member. A plurality of projections for engaging the valleys of a pair of adjacent annular corrugated portions of the synthetic resin corrugated tube are provided at substantially equal intervals in the circumferential direction on the inner peripheral surface of the tubular opening having one end. A sleeve having, at the other end opening, an attachment portion for sealingly attaching to a predetermined portion of another flow path member; an inner surface of the sleeve, and a synthetic resin corrugated tube facing the inner surface adjacent to the sleeve. A joint structure for a corrugated pipe made of synthetic resin, comprising a ring-shaped elastic member interposed so as to be sealable between the valley portions of the pair of annular wave portions. 2. The other flow path member has a receiving portion at a predetermined position, and has a spiral groove on an inner peripheral surface of the receiving portion, and a mounting portion of the sleeve has an outer periphery at an opening at the other end of the sleeve. 2. The joint structure for a corrugated pipe made of synthetic resin according to claim 1, wherein the joint structure is a helical ridge formed on the surface and screwably screwed into a helical ridge of a receiving portion of another flow path member. 3. The synthetic resin corrugated pipe joint structure according to claim 1, wherein the other flow path member is a mass, and the mass has a receiving portion for receiving the mounting portion of the sleeve. . 4. The composite according to claim 2, wherein the helical ridge of the sleeve and / or the helical ridge of the other flow path member has a tightening completion confirmation protrusion in front of their respective final portions. Resin corrugated pipe joint structure. 5. The synthetic resin according to claim 1, wherein the sleeve and the other flow path members are formed of a hard synthetic resin, and the elastic member is formed of a rubber or a thermoplastic elastomer. Joint structure for pipes with corrugation. 6. The synthetic resin corrugated pipe joint structure according to claim 1, wherein the sleeve and the elastic member are made of an olefin-based resin. 7. A synthetic resin corrugated pipe joint structure for joining a synthetic resin corrugated pipe having a plurality of annular corrugations at substantially equal intervals in an axial direction of an outer peripheral surface to another flow path member. A plurality of projections for engaging the valleys of a pair of adjacent annular corrugated portions of the synthetic resin corrugated tube are provided at substantially equal intervals in the circumferential direction on the inner peripheral surface of the tubular opening having one end. A sleeve having an opening at the opening at the other end, another flow path member having a receiving portion for receiving the opening of the sleeve in a sealable manner, and an inner surface at the other end side from each projection of the sleeve. A synthetic resin corrugated pipe joint structure comprising: a ring-shaped elastic member interleaved between the synthetic resin corrugated pipe facing the inner surface and a valley portion of a pair of adjacent annular corrugations.