JPH11223286A - Flexible pipe connecting joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To confirm the complete insertion of the end part of a flexible pipe inserted into a pipe joint up to the bottom part of a pipe inserting part and to prevent connecting failures. SOLUTION: A groove hole 42 is provided in a body part male screw part 3 engaged with a cap nut 6 around a connecting pipe inserting part 4 so as to reach the bottom part of the pipe inserting part along an axial direction, an insertion confirming ring 5 having a projecting part 51 in one end is interpolated in a pipe inserting core cylinder 2, the projecting part 51 is engaged with the groove hole 42 provided in the body part male screw part 3 and fitted with play between the pipe insertion bottom part and a connecting pipe tip part and, thus, since the ring 5 is pressed by the tip of the connecting pipe to be fixed when the tip of the connecting pipe reaches the bottom part 41 of the pipe insertion part, the insertion of the pipe is confirmed only by touching the projecting part 51 by a finger.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a water pipe, an air conditioning pipe, etc., which are used by connecting a flexible pipe such as a polyethylene pipe.
The present invention relates to a flexible pipe connection joint capable of confirming that an end of a flexible pipe inserted into a pipe joint is properly inserted up to a bottom of a pipe insertion portion and preventing poor connection.

[0002]

2. Description of the Related Art Conventionally, as a connection joint for a flexible tube, a connection tube is inserted into a gap formed between a tube insertion core tube at one end of a body and a male screw portion surrounding the tube. The connection pipe which is configured to be fastened to the pipe insertion core cylinder via a fastening ring by a cap nut has been used.

[0003] The insertion of the connecting pipe between the pipe inserting core cylinder and the body male thread surrounding it is performed manually by relying on intuition. If it does not reach the bottom and is not completely inserted, poor connection will result, causing water leakage and the like.

Therefore, there has been a problem with a means for confirming whether or not the tip of the connection pipe has reached the bottom of the pipe insertion portion.
It has been proposed to provide a stopper that abuts on the distal end of the connection pipe, or to provide a through window that allows the inner end of the core to be viewed visually.

[0005]

However, there is a problem that the conventional checking means is structurally complicated and cannot be operated in a dark place because it is performed by visual check.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has a groove formed in a male external threaded portion which is screwed with a cap nut and which extends along the axial direction to a bottom portion of a tube insertion portion. An insertion confirmation ring provided with a hole and having a protrusion at one end is inserted into the tube insertion core tube, and the protrusion is fitted into a groove provided in the male screw portion of the body, so that the tube insertion bottom portion and the connection tube tip portion This allows the user to confirm the protrusion of the insertion confirmation ring, which protrudes from the male external thread portion of the body portion, only by touching with a finger.

That is, while the distal end of the connection pipe does not reach the bottom of the pipe insertion section, the protrusion of the insertion confirmation ring projecting from the male screw part of the body has looseness due to loose fit. When the protrusion reaches the bottom of the tube insertion portion, the protrusion is pressed and fixed to the tip of the connection tube, so that it can be clearly confirmed by the tactile sensation of the finger.

In the above configuration, the insertion of the connecting tube is surely confirmed. However, since the projection of the insertion confirmation ring projects from the male external thread portion, another configuration is required if it is inconvenient. As the end of the slot provided in the male external thread portion of the body, the end of the slot is located at a predetermined interval from the bottom of the tube insertion section, the insertion confirmation ring is made of a flexible material, and the connection pipe end passes through the end of the slot. The protrusion of the insertion confirmation ring is drawn into the gap of the tube insertion portion beyond the end of the slot.

Further, if the insertion confirmation ring is merely inserted and loosely inserted into the tube insertion core tube, the ring is extremely unstable while the distal end of the connection tube does not reach the bottom of the tube insertion portion. In this state, the insertion confirmation ring is provided on both sides of the inner diameter of the insertion confirmation ring with projections which are pressed into contact with the outer surface of the tube insertion core tube by insertion, so that the insertion confirmation ring is stably supported on the tube insertion core tube.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a body constituting a main body. A threaded joint portion 8 is formed at one end of the body 1 by screwing a metal tube or the like, and the other end surrounds the tube insertion core tube 2. The gap formed between the body male screw portions 3 constitutes a tube insertion portion 4 into which the connection tube is inserted.

Reference numeral 7 denotes a tightening ring, which is reduced in diameter by an inner tapered surface of the cap nut 6 as the cap nut 6 advances, and irregularities 71 formed on an inner wall surface of the cap ring 7 are formed on the outer surface of the connection pipe A. The bite and the connection pipe A are tightened.

A slot 42 is formed in the body male thread 3 to reach the bottom 41 of the tube insertion portion along the axial direction.
The protrusion 51 provided at one end of the insertion confirmation ring 5 inserted into the tube is fitted, and is pushed by the distal end a of the connection tube by the insertion of the connection tube A into the tube insertion portion 4 so that the bottom portion 41 of the tube insertion portion is pushed. When the distal end a of the connection pipe reaches the bottom 41, the connection pipe is pressed and becomes fixed.

The top of the projection 51 of the insertion confirmation ring 5 slightly protrudes from the threaded surface of the male threaded portion 3 of the body.
When the cap nut 6 is screwed into the body male screw 3 and reaches the portion where the top of the projection 51 projects, the slot 42 is inserted into the slot 42. The protruding apex is stored in a curved shape in the storage portion 44 provided at the end portion.

As shown in FIGS. 5, 6, and 7, the end 43 of the slot 42 provided in the male external thread portion 3 is set to a position at a predetermined interval from the bottom 41 of the tube insertion portion. Is made of a flexible material, and when the connecting pipe tip a passes through the terminal end of the slot 42, the protrusion of the insertion confirmation ring is drawn into the gap 44 of the pipe insertion portion ahead of the terminal end 43 of the slot. If
The projection top of the insertion confirmation ring is completely uninteresting.

Further, the insertion confirming ring 5 is provided on both sides of the inner diameter thereof with projections 52, 52 which are pressed into contact with the outer surface of the tube insertion core tube 2 by insertion. , The insertion confirmation ring 5 is stably supported by the loose fitting portion.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, in which a flexible connecting pipe is inserted into a pipe joint, and a whole vertical cross-sectional side view in a state where the tip does not reach the bottom of the pipe insertion portion.

FIG. 2 is a side view of the entire longitudinal section in a state where the tip of the flexible connection pipe has also reached the bottom of the pipe insertion section.

FIG. 3 is also a plan view of the male torso part showing the state of the slot formed in the male torso part by removing the cap nut;

FIG. 4 is a front view showing an embodiment of an insertion confirmation ring.

FIG. 5 shows another embodiment of the present invention, in which a cap nut is removed, and a plan view of a body male screw portion showing a state of a slot provided in the body male screw portion.

FIG. 6 is a side view of the entire longitudinal section in a state where the tip of the flexible connection pipe in the embodiment of FIG. 5 reaches the bottom of the pipe insertion portion and the cap nut is tightened.

[Explanation of symbols]

1 Body of joint body 2 Tube insertion core tube 3 Body male screw 4 Tube insertion 41 Bottom of tube insertion 42 Slot of tube insertion 43 Termination of slot of tube insertion 44 Confirmation of slot insertion Gap / storage for accommodating ring protrusion 5 Insertion check ring 51 Insertion check ring protrusion 52 Projection 52 6 Cap nut 7 Tightening ring 71 Unevenness formed on inner wall surface of tightening ring 8 Screw joint A Flexible connection Pipe a Tip of flexible connection pipe

Claims (3)

[Claims] 1. A flexible pipe connection joint in which a connection pipe inserted into a pipe insertion part of a body is fastened to a pipe insertion core cylinder via a fastening ring with a bag nut, and the connection pipe insertion part is surrounded by a bag. The body male screw part to be screwed with the nut is provided with a groove extending to the bottom of the tube insertion part along the axial direction, and an insertion confirmation ring provided with a protrusion at one end is inserted into the tube insertion core tube, and the protrusion is formed. Flexible pipe connection joint with a part fitted into a slot provided in the body male screw part and loosely fitted between the pipe insertion bottom and the connection pipe tip 2. An end of a slot provided in a male external thread portion of a body portion is provided at a predetermined interval from a bottom of a tube insertion portion, an insertion confirming ring is made of a flexible material, and a distal end of a connection tube has a terminal end of the slot. 2. The protruding portion of the insertion confirmation ring is drawn into the gap of the tube insertion portion beyond the end of the slot when passing through.
Flexible pipe connection fitting described 3. The insertion confirmation ring is provided on both sides of the inner diameter of the insertion confirmation ring with projections which are pressed into contact with the outer surface of the tube insertion core tube by insertion, so that the insertion confirmation ring is stably supported on the tube insertion core tube. The flexible pipe connection joint according to claim 1 or 2.