JPS5847352Y2 - Hose attachment device - Google Patents

Description

[Detailed Description of the Invention] A pipe joint is known which is provided with a hose connection portion at one end of the main body of the joint, and such a pipe joint is provided with a hose attachment device.

The above-mentioned hose attachment device is one in which a large number of protrusions and saw teeth are formed in the circumferential direction on the hose connection part, and the hose connected to the part is tightened with a nut. In the pipe joint described in No. 2360761, since the thread of the nut and the serrations bite into the hose, there is a drawback that the hose can be cut by the sharp thread when the hose is attached or detached. Another U.S. Patent No. 2
In the pipe joint of No. 460653, the action of the tapered cam on the inner surface of the nut does not spread evenly to the clip ring interposed between the nut and the hose, and the action is not evenly applied to the outer surface of the hose as shown in the drawing. The biting action cannot be obtained and the hose is slippery, and when the hose is pulled, it easily comes off.Especially, when the hose becomes old and hard, the tightening force by the nut's taper cam is no longer able to reach the surface of the hose, and the hose becomes slippery. This had the disadvantage that it became useless as a mounting device.

There are many other devices known to prevent hoses from being pulled out, but the common structure of conventional hose removal prevention measures is to catch the surface of the hose in several places, which prevents the hose from becoming sagging. The hose could not be used permanently.

The present invention was developed in consideration of the fact that with conventional hose attachment devices for pipe joints, it was not possible to permanently tighten the hose without damaging it, and it was also impossible to use the hose permanently.
This is a hose attachment device devised with the aim of eliminating all such drawbacks and inconveniences.It has a hose connection part at the end of the plug on the outer periphery of the plug, and a nut is screwed into the part adjacent to the connection part. In a pipe joint of the type in which the inner circumferential surface of the nut and the outer circumferential surface of the plug hold down the inner and outer surfaces of the hose, the inner circumferential surface of the nut has a diameter smaller than that of the female thread adjacent to the female thread. A cylindrical hole with a cylindrical hole is provided, and a locking portion that bites into the outer surface of the hose appropriately is provided at the boundary between the female threaded portion and the cylindrical hole, facing the hose connection portion. The hose connection part on the outer periphery is provided with a tapered part near the male thread that is screwed into the nut, the diameter of which becomes larger as you get closer to the thread, and which faces the locking part of the nut. A locking part that presses the inner surface of the hose appropriately is provided in the center of the hose connection part that faces the stopper at a position close to the stopper, so that when the hose is connected, the hose outer surface locking part of the nut and the hose inner surface of the plug are locked. The hose is characterized by being cut into the inner and outer surfaces of the hose in one place in the circumferential direction, and the hose is held under appropriate pressure from the wall thickness direction.

Therefore, according to the present invention, there is provided a hose attachment device in which a number of protrusions or sawtooth locking portions are formed in the circumferential direction on the surface of the hose connection portion, and the portions are tightened with nuts, for example, as disclosed in the U.S. Pat. Specification No. 2360761 and No. 24606
Compared to the device described in the specification of No. 53, the locking portions bite into the inner and outer surfaces of the hose at one point each, and are located closer to each other, and the tapered portion of the hose connection portion is located closer to each other. The part cooperates with the locking part on the nut side to effectively clamp and lock the inner and outer surfaces of the hose at the minimum number of points, so the connected hose will never come off even if it is pulled.

As is clear from the above configuration, the present invention does not allow the female threaded part of the nut to dig into the inner and outer surfaces of the hose, thereby causing cuts to the inner and outer surfaces of the hose or causing the hose to become sagging. To permanently produce a strong hose-pressed young fruit without any fear and without shortening the service life of the hose.

Examples of the present invention will be described below, but the present invention is not limited to these examples.

1 is a plug body, 2 is a hexagonal nut-shaped tightening part 2 formed in the center part, and on the left side of the tightening part 2 in FIG. 3
will be established.

A first taper part 6 and a second taper part 8 are formed at the same inclination angle on the outer periphery of the right end of the plug body 1 in the figure, and the first taper part 6 and the second taper part 8 become larger in diameter as they approach the male threaded part 4. Then, one hose locking portion 7 having a sawtooth cross-sectional shape is formed at the intermediate portion of the tapered portions 6 and 8.

4 is the above 1. The threaded portion of the nut 10 (
(male thread) and has a larger diameter than the hose connection part above.
A screen surface 5 that catches the end surface of the hose 14 is formed between the connecting portion and the male threaded portion 4.

Note that the female threaded portion 111/'i of the nut 10 is the tightening portion 2
The nut 10 has a long enough length that it can be screwed into the male threaded part 4 at the screen surface 5, and the tip of the nut 10 has a
A cylindrical hole 13 for holding the hose 14 from the outer circumferential direction is formed to have a diameter smaller than that of the female threaded portion 11, and furthermore, a cylindrical hole 13 is formed between the female threaded portion 11 and the cylindrical hole 13, and is located close to the hose locking portion 7 and has a diameter smaller than that of the female screw portion 11. 1 forming a step portion 12 facing the tapered portion 6;
This single stepped portion 12 constitutes a hose locking portion that appropriately presses and engages the outer surface of the hose in the thickness direction as shown in FIG.

! In addition, the hose locking portion 7 formed on the plug side and the hose locking portion 12 formed on the nut side are opposed to each other in close proximity to each other, as shown in FIG. The connecting parts 7 and 12 are configured to appropriately clamp and lock the inner and outer surfaces of the hose from the wall thickness direction.

In addition, the hose locking part 22 of the hose connection part shown in FIG.
The nut 1 shown as an example in FIG.
0 can be similarly screwed on.

The operation of the above embodiment is as follows.

Insert the hose 14 into the cylindrical hole 13 of the nut 10, then fit the tip of the hose 14 into the second tapered part 8 first, and after passing through the hose locking part 7, further fit it into the first tapered part 6. Push the hose 14 in until the tip of the hose 14 comes into contact with the screen 5.

In this case, after the hose 14 passes through the hose locking part 7,
The inner diameter is reduced again to tightly contact the first tapered portion 6.

Next, by screwing the nut 10 into the male threaded portion 4 of the plug body 1, the cylindrical hole 13 of the nut 10 and the female threaded portion 1 are connected.
The hose locking part 12 formed at the boundary with the plug body 1 and the hose locking part 7 formed at the hose connection part of the plug body 1 moderately clamps the hose 14 at a close position, and both 7 and 12,
The hose 14 is clamped by clamping and locking the inner and outer surfaces of the hose 14 from the wall thickness direction.

According to the embodiment described above, in order to clamp and lock the hose 14 in the wall thickness direction by both the hose locking portions 7 and 12 facing each other at close positions and the tapered portion 6, a cut is made in the hose. It can be permanently tightened, and the tightened state will not loosen even if it is repeatedly attached and detached.

[Brief Description of the Drawings] The drawings show an embodiment of the present invention, and Fig. 1 is a vertical cross-sectional side view showing a partially cut away connected hose, and Fig. 2 shows another example of the hose connection part. It is a longitudinal side view shown with a hose. 1...Plug, 4, 21...Male thread part, 6...Taber part, 7, 22...Hose locking part, 10... ...Natsuto, 11...
・Female thread part, 12... Hose locking part, 13...
...Cylindrical hole, 14, 23...Hose.

Claims (1)

[Scope of utility model registration request] A type in which a hose connection part is provided at one end of the outer circumference of the plug, and a nut is screwed into the part adjacent to the connection part, and the inner and outer surfaces of the hose are pressed by the inner circumferential surface of the nut and the outer circumferential surface of the plug. In this pipe joint, a cylindrical hole with a diameter smaller than that of the female thread is provided on the inner peripheral surface of the nut adjacent to the female thread, and a hose is provided at the boundary between the female thread and the cylindrical hole. A locking part that bites into the outer surface of the hose moderately is provided opposite to the connection part, and on the other hand, on the hose connection part around the outer circumference of the plug, there is a locking part close to the male thread that screws into the nut mentioned above. The diameter of the hose becomes larger as the nut increases, and at the same time a taper part is provided that faces the locking part of the nut, and the inner surface of the hose is moderately pressed at the center of the hose connection part that faces the locking part at a close position. When connecting the hose, the nut's hose outer surface locking part and the plug's hose inner surface locking part are inserted into the inner and outer surfaces of the hose in the circumferential direction, one at a time, and the hose is connected. A hose attachment device that is characterized by moderate clamping and locking from the wall thickness direction.