JP2001173863A5 - Flexible tube fittings - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a flexible tube joint , and more particularly to a flexible tube joint for a flexible tube composed of a corrugate pipe used for gas piping and the like.

0002.
[Conventional technology]
As a joint of this type, for example, in Japanese Patent Application No. 10-291230, a stop ring is screwed into the main body of the joint, an annular sealing material is arranged inside the main body, and the sealing material and the stop inside the main body. It is known that an annular retainer is arranged between the inner peripheral tapered surface of the tip of the ring.

In such a joint , a flexible tube composed of a corrugate pipe having a plurality of peaks and valleys is directed from an opening at the end of the stop ring toward the inside of the stop ring and the main body. By inserting the flexible tube, the mountain portion of the corrugate tube constituting the flexible tube expands the retainer, passes through the retainer, and enters the inside of the sealing material to be in close contact with the inner peripheral surface thereof. This seals between the fitting and the corrugate pipe. When the mountain part of the corrugate pipe passes, the retainer elastically shrinks and returns to the original state, and engages with the valley part of the corrugate pipe. At this stage, the joining of the flexible tube to the fitting is complete.

0005
[Problems to be Solved by the Invention]
In the flexible tube joint having such a configuration, as described above, the retainer has notches at a plurality of positions along the circumferential direction, and therefore the configuration is not easy.
Therefore, an object of the present invention is to make it possible to realize a flexible tube joint with a simple configuration.

0006
[Means for solving problems]
In order to achieve this object, the present invention comprises a tubular body and a stop ring having a tip portion mounted inside the tubular body and an inner peripheral tapered surface formed with a diameter increasing toward the tip side thereof. , The annular sealant provided inside the tubular body and the annular retainer arranged between the inner peripheral tapered surface of the stop ring and the sealant inside the tubular body are flexible. A corrugate tube having a plurality of peaks and valleys in the tube is inserted from the end of the stop ring toward the inside of the stop ring and the tubular body, thereby passing through the retainer. The retainer is configured to penetrate and come into close contact with the inner peripheral portion of the sealing material, and the retainer is composed of an annular body divided by one in the circumferential direction, and is elastic by the mountain portion of the corrugate pipe as it passes through the inside. In addition to being configured to be expanded in diameter, it is possible to engage both the corrugate pipe inserted inside the corgate tube and the inner peripheral tapered surface of the stop ring.

0008
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows a flexible tube joint according to an embodiment of the present invention. The joint 1 has a metal tubular main body 2 and a metal stop ring 3 whose tip is screwed into the tubular main body 2, and the inside of the tubular main body 2 is made of an annular metal. The retainer 4 and the annular rubber sealing material 5 are arranged. An inner peripheral tapered surface 6 whose diameter increases toward the tip end side is formed at the tip end portion of the stop wheel 3. The sealing material 5 is mounted on the inner circumference of the tubular main body 11, and the retainer 4 elastically expands the diameter between the inner peripheral tapered surface 6 of the stop ring 3 and the end surface 7 of the sealing material 5 in the axial direction. It is provided in a movable state.

FIG. 1
It is a figure which shows the structure of the joint for flexible tubes of embodiment of this invention.

[Claims]
1. A tubular main body, a stop ring having a tip portion mounted inside the tubular main body and an inner peripheral tapered surface formed with an inner peripheral tapered surface whose diameter increases toward the tip side, and the tubular main body. It is provided with an annular sealing material provided inside the tubular body and an annular retainer arranged between the inner peripheral tapered surface of the stop ring and the sealing material inside the tubular body.
A corrugate tube having a plurality of peaks and valleys in the flexible tube is inserted from the end of the stop ring toward the inside of the stop ring and the tubular body, thereby passing through the retainer. In addition, it is configured so that it penetrates into the inner circumference of the sealing material and comes into close contact with it.
The retainer is composed of an annular body divided by one in the circumferential direction, and is configured so that when the mountain portion of the corrugate pipe passes through the inside, the diameter is elastically expanded by the mountain portion, and inside the mountain portion. A joint for a flexible tube characterized in that it can be engaged with both the inserted corrugate pipe and the inner peripheral tapered surface of the stop ring.