JP2000240867A - Pipe coupling for waterworks - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe coupling for waterworks to prevent the dropout of an elastic ring in a cap body, fitted in the outer periphery of a polyethylene pipe. SOLUTION: A pipe coupling for waterworks comprises a drum body part 10 having an O-ring 12 at the inner periphery to the deep part of which a polyethylene pipe P is inserted and in the inlet of which a female screw 14 is formed, and a cap body 20 having a taper hole 24 having one end part with a male screw 21 formed on its outer periphery and threadedly engaged with a female screw 14 and being tapered off from the opening of one end part toward an inlet in which the polyethylene pipe P at the other end part is inserted, and having an elastic ring 26 with an inner surface, on which a plurality of annular protrusions are formed in a wedge shape in cross section for alignment, and an outer peripheral surface formed in a taper shape. A flange (or a protrusion part) 25 is formed on the inner edge of the opening of one end part of the cap body 20, and a seat plate 30 for preventing the dropout of the elastic ring 26 is positioned between the elastic ring 26 and the flange 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water pipe joint for connecting a one-touch operation by inserting a polyethylene pipe.

[0002]

2. Description of the Related Art A conventional water pipe joint which can be easily connected by one-touch operation by inserting a polyethylene pipe from an inlet and tightening the same, for example, as shown in FIG. A body part a in which an O-ring b is attached to an inner peripheral inner part and a female screw c is formed at an inner peripheral entrance;
A male screw f that is screwed to the female screw c is formed on the outer circumference of one end, and the taper hole h gradually narrows from the opening at the same end toward the inlet g where the polyethylene pipe p at the other end is inserted. A plurality of annular ridges j having a wedge-shaped cross section are arranged in the inner surface, and an elastic ring i having an outer peripheral surface tapered is formed by a cap body e loosely fitted in the tapered hole h. .

[0003]

In the above-mentioned conventional water pipe fitting, when the already connected polyethylene pipe is replaced with a new one, or when the length of the polyethylene pipe is inappropriate, the polyethylene pipe is replaced with another one. In this case, the cap e must be removed from the body a. At this time, there has been a disadvantage that the elastic ring i comes off the cap body e and falls off.

[0004] It is an object of the present invention to provide a water pipe joint in which an elastic ring in a cap body fitted to the outer periphery of a polyethylene pipe to be connected is prevented from falling off.

[0005]

According to the first aspect of the present invention, an O-ring is attached to an inner peripheral portion into which a polyethylene pipe is inserted, and a female screw is formed at an inner peripheral entrance. Formed around the body and a tapered hole that is gradually narrowed from the opening at the same end to the entrance where the polyethylene pipe is inserted at the other end from the opening at the same end at the outer periphery of one end. A water pipe coupling comprising a cap body in which a plurality of annular ridges having a wedge-shaped cross section are arranged in an inner surface and an outer peripheral surface is tapered, and an elastic ring is loosely fitted in the tapered hole. A flange or a protrusion is formed on the inner edge of the opening at one end of the cap body, and a seat plate is provided between the elastic ring loosely fitted in the tapered hole and the flange or the protrusion to prevent the elastic ring from falling off. It is characterized by having done.

In order to achieve the same object, the invention according to claim 2 is directed to a method in which an O.R.
A body attached with a ring and a female screw at the inner circumference entrance,
At the outer periphery of one end, a male screw is formed to be screwed to the female screw, and a taper hole gradually narrowing from the opening at the same end toward the inlet into which the polyethylene pipe at the other end is inserted is formed around the inner surface. A plurality of annular ridges having a wedge-shaped cross-section are arranged in a row, and a resilient ring having an outer peripheral surface tapered is a cap body loosely fitted in the tapered hole. A flange or a protrusion for preventing the elastic ring from falling off is formed on the inner edge of the opening at one end.

[0007]

Since the movement of the elastic ring loosely fitted to the cap is restricted by the flange or the projection, the elastic ring is prevented from falling off (protruding) when the cap is removed.

[0008] According to this water pipe fitting, the elastic ring fitted to the outer periphery of the polyethylene pipe to be connected can be prevented from falling off or jumping out. Work such as exchanging with another can be performed smoothly, and the usability is very good.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a water supply pipe joint shown with a polyethylene pipe connected and partially cut away, and FIG. 2 is an exploded perspective view of FIG.

In FIGS. 1 and 2, J is a water pipe joint used for connecting a polyethylene pipe. The pipe joint J is composed of a body 10 and a cap body 20. An O-ring 16 is attached to the body portion 10 in a circumferential groove 12 formed in the inner periphery of the through hole 11 into which the polyethylene pipe p is inserted, and a large-diameter female screw 14 is Are formed. A male screw 15 for screwing a cap nut for attaching another device (not shown) or the like is formed in the portion 10a on the opposite side of the inner peripheral entrance 13 of the body portion 10.

In this embodiment, the body 10
Is formed in a straight line, but this is formed in a bend form, or a similar through hole 11 and a female screw 14 are formed in the opposite portion 10a of the body portion 10, and polyethylene pipes are inserted from both directions of the body portion 10, respectively. It is also possible to adopt a form in which pipes are connected to each other.

On the outer periphery of one end 20a of the cap body 20, a male screw 21 is formed which is screwed into the female screw 14 of the body 10, and the polyethylene pipe p at the other end 20b extends from the opening 22 at the same end 20a. Is formed centering on a tapered hole 24 that gradually narrows toward an inlet 23 into which is inserted, and a flange (or projection) 25 is formed on the inner edge of the opening 22. Reference numeral 26 denotes a general elastic ring, in which a plurality of annular ridges 29 having a wedge-shaped cross section are arranged in a row on the inner surface of a main body 27 having a slit 28 formed in the axial direction.
7a is tapered. The cap body 20
An elastic ring 26 is loosely fitted in the tapered hole 24, and a synthetic resin ring-shaped seat plate 30 elastically deformable is mounted between the elastic ring 26 and the flange 25. It is provided to prevent

The water pipe fitting J is provided with a seat plate 30 for preventing the elastic ring 26 from falling off. The seat plate 30 is omitted, and the end face of the elastic ring 26 is directly connected to the flange 25.
, So as to prevent falling off (protrusion).

According to the water pipe fitting having such a configuration,
Since the elastic ring loosely fitted to the cap body can be prevented from falling off, it is very convenient to use.

[Brief description of the drawings]

FIG. 1 is a side view of a water pipe fitting shown with a polyethylene pipe connected and partially cut away.

FIG. 2 is an exploded perspective view of FIG. 1;

FIG. 3 is a side view in which a part of a conventional water pipe fitting is broken.

[Explanation of symbols]

p → Polyethylene pipe J → Piping for water supply 10 → Body 13 → Inner circumference entrance 14 → Female thread 16 →
O-ring 20 → Cap body 20a → One end 20b → Other end
21 → male screw 22 → opening 23 → entrance 24 → tapered hole 25 → flange (or projection) 26 → elastic ring 27 → main body 27a → outer peripheral surface 29
→ Ring ridge 30 → Seat plate

Claims (2)

[Claims] 1. A body having an O-ring attached to an inner peripheral portion into which a polyethylene pipe is inserted and having a female screw formed at an inner peripheral entrance, and a male screw which is screwed to the female screw is formed at one outer peripheral portion. A tapered hole that gradually narrows from the opening at the same end toward the inlet where the polyethylene pipe at the other end is inserted is formed at the center, and a plurality of annular ridges having a wedge-shaped cross section are arranged in the inner surface to form an outer peripheral surface. A water pipe joint comprising an elastic ring having a tapered shape and a cap body loosely fitted in the tapered hole, wherein a flange or a projection is formed on an inner edge of an opening at one end of the cap body, and the taper is formed. A water pipe fitting comprising a seat plate for preventing the elastic ring from falling off between the elastic ring loosely fitted in the hole and the flange or the projection. 2. A body portion having an O-ring attached to an inner peripheral portion into which a polyethylene pipe is inserted and a female screw formed at an inner peripheral entrance, and a male screw screwed to the female screw is formed at an outer peripheral portion at one end. A tapered hole that gradually narrows from the opening at the same end toward the inlet where the polyethylene pipe at the other end is inserted is formed at the center, and a plurality of annular ridges having a wedge-shaped cross section are arranged in the inner surface to form an outer peripheral surface. A water pipe joint comprising a tapered elastic ring and a cap body loosely fitted in the tapered hole, and a flange or a flange for preventing the elastic ring from falling off at an inner edge of an opening at one end of the cap body. A water pipe joint characterized by forming a projection.