JPH01299395A - Tube fitting - Google Patents

Abstract

PURPOSE:To effectively prevent a hose from being pulled out with a simple structure by without deteriorating the sealing characteristic of the tube fitting providing a plurality of protrusions on the end of a tube fitting made of a rigid material, fitting the hose by passing the protrusions and fastening by a fastening ring. CONSTITUTION:A tube fitting 1 is made of metal or soft synthetic resin from the engaging part of its end and the sealing part 3 of a part nearer to a bottom than it. This engaging part is constituted of an engaging pipe part 21 and a plurality of protrusions 22 protruding higher than the major diameter of the sealing part 3 from the periphery of the engaging pipe part 21. Then, a screw 41 is provided in the internal periphery of the bottom of the sealing part 3 and screwed to a screw part. A hose H is on the external periphery of the sealing part 3 as shown by broken lines and a fastening ring R is fastened to the external periphery of the hose H. Accordingly to such a constitution, when the hose H is apt to be pulled out, the fastening ring R cannot pass the protrusions 22 to effectively prevent the hose H from being pulled out.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a pipe joint formed by fitting pipes such as rubber hoses, and more specifically to a pipe joint that reliably ensures that the fitted rubber hose does not come off. Regarding.

(Prior Art) Conventionally, pipes such as water hoses and bathroom hoses have been fitted into metal pipe joints and tightened around the outer periphery to prevent them from coming off.

(Problems to be Solved by the Invention) However, when the pressure of the flowing fluid increases, there is a risk that the hose may easily fall off depending on how tightly the hose and the joint are tightened.

For this reason, it has been difficult to use conventional pipe joints as pipe joints for high-pressure hoses.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a pipe joint that has a simple structure and can reliably prevent the hose from coming off without reducing the sealing performance of the pipe joint.

(Means for Solving the Problems) A feature of the present invention is that a plurality of protrusions are provided at the tip of a pipe joint made of a rigid material such as metal, a hose is fitted over the protrusions, and the hose is It is tightened with a tightening ring to prevent the hose from coming off.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing one embodiment of the present invention, FIG. 2 is a plan view, and FIG. 3 is a cross-sectional view taken along the line A-A of FIG.

The pipe joint 1 of the present invention is made of a rigid material such as metal or hard synthetic resin.

The pipe joint 1 consists of a locking part 2 at the tip and a sealing part 3 on the base side. The locking portion 2 includes a locking tube portion 2, and a locking tube portion 2. It consists of a plurality of protrusions 2□ that protrude higher than the outer diameter of the sealing part 3 from the outer periphery of the sealing part 3.

A screw 41 is provided on the inner periphery of the base of the sealing part 3, so that it can be attached by being screwed into a threaded part (not shown).

Further, a hose H is fitted to the outer periphery of the sealing portion 3 as shown by the broken line in FIG. 3, and a tightening ring R is tightened around the outer periphery of the hose H.

Since the present invention is configured as described above, even if the hose H tries to come off from the pipe joint 1, the tightening ring R
Since it is not possible to overcome the □, this will reliably prevent the hose H from coming off.

In addition, since the protrusion 22 is partially provided, when fitting a hose etc., it is easy to get over the protrusion 2 □ and fit it, and the protrusion 2 □ does not interfere with fitting. There isn't.

FIG. 4 shows an embodiment in which a 4° screw is provided on the outer periphery of the base of the sealing portion 3, and the other structures are similar to the embodiments shown in FIGS. 1 to 3.

The embodiment shown in FIG. 5 shows a pipe joint in which a hose is fitted to both ends of the pipe joint 1, and shows a structure in which projections 2□ are provided at both ends.

In the embodiments shown in FIGS. 1 to 5 above, a conical skirt portion for preventing the hose from coming off is formed on the outer periphery of the pipe, but the present invention is not limited to the above embodiments. This also includes pipe fittings with simple structures such as the following.

That is, FIG. 6 shows projections 2 at both ends of a pipe joint 1 made of a cylindrical pipe.
This is an embodiment in which □ is provided, and according to this embodiment, a pipe joint with a simple structure and low cost can be obtained.

In addition, FIGS. 7 and 8 show a pipe joint 1 having a screw 4 at one end, and an elliptical shape with a straight surface in order to enable the use of a screwing and turning tool such as a spanner. This is an embodiment in which a holding portion 5 is provided.

According to this structure, a spanner can be inserted into the clamp 81S5 of the pipe joint 1 and screwed in easily.

(Effects of the Invention) As explained above, according to the present invention, the hose or the like fitted to the pipe joint is reliably prevented from coming off.

In addition, the structure is simple, the cost is low, and the hose is reliably prevented from coming off, so a highly reliable high-pressure pipe joint can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a front view showing one embodiment of the present invention, Fig. 2 is a plan view, Fig. 3 is a sectional view taken along line AA in Fig. 1, and Fig. 4 is a front view showing another embodiment of the present invention. 5 is a front view showing still another embodiment of the invention, FIG. 6 is a front view showing another embodiment of the invention, and FIG. 7 is a front view showing another embodiment of the invention. , FIG. 8 is a sectional view taken along the line B-B of FIG. 1: Pipe joint 2: Locking part 2□: Protrusion 3: Sealing part 4:
Screw 5: Clamping part H: Hose R: Tightening ring Patent attorney Mibe Tsuji (and 1 other person) Figure 4 Figure 6 Figure 5 Figure 7

Claims (2)

[Claims] (1) In a pipe joint made of a rigid material that is fitted with a pipe made of a flexible material, the pipe joint is composed of a locking part at the tip and a sealing part on the base side thereof, and the locking part The portion comprises a locking tube portion and a plurality of protrusions protruding from the outer periphery of the locking tube portion higher than the outer diameter of the sealing portion, and the outer periphery of the sealing portion is in close contact with the inner periphery of the tube. A pipe joint featuring: (2) In a pipe joint made of a rigid material that is fitted with a pipe made of a flexible material, the pipe joint is composed of a locking part at the tip and a sealing part on the base side thereof, and the locking part The portion includes a locking tube portion and a plurality of projections protruding from the outer periphery of the locking tube portion higher than the outer diameter of the sealing portion; A pipe fitting characterized by having a tightening ring around the outer periphery to prevent it from coming off.