JPH0225037Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a hose joint that can connect hoses with good sealing properties.

(Prior art and its problems) Various joints for connecting hoses through which fluid flows are known.

FIG. 5 shows a typical conventional joint 1.

This joint 1 has a concave groove 3 on the outer periphery of the nipple 2.
An O-ring 4, which is a seal ring, is fitted into the concave groove 3. After the hose 5 is attached to the nipple 2, the outer circumference of the hose 5 is tightened with a fastener 6 to fix it.

This joint 1 has the advantage of having a simple configuration.

However, such a joint 1 is often used as a part of a pressure device, and in that case, high-pressure fluid flows into the hose 5 and the hose 5 swells, causing a gap between the O-ring 4 and the inner wall of the hose 5. There is a problem that a gap is created between the two, making it easy for fluid to leak.

In such a case, it is conceivable to use a rubber cup 8 provided with a lip 7 as a seal ring, as shown in FIG.

If this rubber cup 8 is used, the fluid pressure will be increased by the lip 7.
There is an effect of trying to spread out the material, resulting in better sealing performance.

However, in order to make the above effect effective,
The peripheral edge of the lip 7 must be in close contact with the inner wall of the hose 5. For this reason, the rubber cup 8 must have its lip 7 periphery protruding outward beyond the outer wall of the nipple 2 when the hose is not attached.

However, if you do this, the end surface of the hose 5 will get caught on the lip 7 when the hose 5 is installed, and
When the rubber cup 8 is pushed in, the lip 7 portion may be torn off, and the rubber cup 8 itself may come out of the groove 3.

Therefore, for a type of joint in which the hose 5 is attached to the outer periphery of the nipple 2, the above-mentioned lip type rubber cup cannot be used.

The present invention was devised to solve the above-mentioned problems, and its purpose is to provide a hose that can be easily attached without the seal ring deviating from the groove, and that also has excellent sealing properties. It is to provide joint points.

[Summary of the idea]

The present invention has the following configuration to solve the above problems.

That is, a nipple is inserted into the end of the hose to be connected to attach the hose, a hose retaining means is secured to the outer periphery of the hose attached to the nipple, and the nipple is fitted into a seal groove provided on the outer periphery of the nipple. In the hose joint, the seal ring 20 includes a substantially cylindrical main body portion 21 that fits in the seal groove, and a cross-sectional view that has a substantially U-shaped shape. a cylindrical part 23 that is integrally connected to a midway part of the outer periphery of the main body part 21 at the apex of the body part 21, and a pressed part that is a part of the cylindrical part 23 on the side opposite to the nipple with respect to the connecting position. 22 is formed to be short and thick, and its tip is set to protrude outward from the outer wall 15 of the nipple when the hose is not attached, and is a contact tongue which is a part on the nipple end side with respect to the above connection position. The piece 24 is characterized in that its outer wall is set to be approximately at the same height as the outer wall 15 of the nipple when the hose is not attached, and is formed to become thinner toward the tip.

(Examples) Examples of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, a nipple 14 is provided at the center of a cylinder 12 into which a reinforced rubber hose 10 is inserted, and which is inserted into the cylinder 12 while slidingly contacting the inner peripheral surface of the hose 10. The length of the nipple 14 is about 1 cm, and an air vent 16 is formed in the center.
A seal groove 18 is formed on the outer peripheral surface of the middle part of the nipple 14.
A self-sealing type seal ring 20 is fitted into the seal groove 18. As is clear from FIG. 2, the seal ring (hereinafter simply referred to as a seal) 20 includes a substantially cylindrical main body portion 21 that fits within the seal groove, and a cross section that is approximately in the shape of a square, with an apex portion of the shape. The pressed part 22, which is the part of the cylindrical part 23 on the side opposite to the nipple with respect to the connecting position, is short. The contact tongue piece 24 is formed to be large in size and thick, and its tip is set to protrude outward from the outer wall 15 of the nipple when the hose is not attached, and is a part on the nipple end side with respect to the connection position. is set so that its outer wall is approximately at the same height as the outer wall 15 of the nipple when the hose is not attached, and is formed so that it becomes thinner toward the tip. The root portion of the nipple 14 is expanded in diameter and fixed to the inner diameter surface of the cylinder 12,
A silencer 26 is installed inside the enlarged diameter portion of the nipple 14.

A hose removal prevention mechanism and a removal prevention mechanism are provided at the hose 10 insertion opening of the cylinder 12. These retaining mechanisms and retaining release mechanisms are conventionally known, and the currently used hose joint retaining mechanisms and retaining release mechanisms can be suitably used as they are. In the illustrated example, the diameter of the hose insertion port of the cylinder 12 is slightly expanded, a cap 28 is provided inside the insertion port, and a ring 30 is fixed to the tip of the cap 28 toward the center of the cylinder 12. A large number of lock pawls 32 facing toward the center of the cylinder 12 are provided at the tip of the ring 30 to serve as a mechanism for preventing the ring from coming off.
A retaining release mechanism is formed by a ring-shaped release part 36 surrounding the slope part 34 that opens the cylinder 12 from the inside to the outside, and a hose release ring 38 that is connected to the ring-shaped release part 36 and contacts the insertion opening of the cylinder 12. do.

Next, the usage method and function of the hose joint according to this embodiment will be explained.

When the hose 10 is inserted into the cylinder 12 as shown in the right half of FIG.
It is guided by the chamfered part at the tip of 4 and smoothly encloses the nipple 14. During the contact with the seal 20, the contact tongue portion 24 of the seal 20 on the tip side of the nipple 14 contacts the outer wall 15 of the nipple.
Since it is set at approximately the same height as the seal groove 18 and is housed in the seal groove 18, there is no resistance at all. When the inner circumferential surface of the tip of the hose 10 comes into contact with the pressed portion 22 of the L-shaped portion of the seal 20, the pressed portion 22 is brought down, and at the same time, the contact tongue portion 24, which is the lower tip of the L-shaped portion, is brought down. The lever action allows the seal 20 to completely seal the inner peripheral surface of the hose 10. In other words, even if the hose has an uneven outer circumferential surface, the inner circumferential surface has extremely good surface precision, so a perfect seal can be achieved. Even if an attempt is made to pull out the hose 10 in this state, the locking claws 32 act to lock the outer circumferential surface of the hose 10, and this locking action is more reliable because the outer circumferential surface of the hose has an uneven shape. When high pressure gas flows through the hose 10, the hose 10 expands, but at this time the nipple 14 and the hose 10
A gap is created between the seal 20 and the inner circumferential surface of the hose 10, and the air seal tends to be incomplete with ordinary sealing materials such as O-rings. Not only does this eliminate the risk of air leakage, but the higher the air pressure used, the stronger the force that presses the blade-shaped portion of the seal 20 from the inside against the inner circumferential surface of the hose 10, making the seal more complete. In addition, as the hose expands, the engagement between the outer circumferential surface of the hose and the lock claw 32 becomes more secure, and since the end of the hose is supported by the nipple 14, there is no deformation such as shrinkage toward the center of the inner diameter, and the hose can be pulled out completely. This can be prevented.

The hose can be easily released by pressing the hose release ring 38 toward the mouth of the cylinder 12 to release the lock pawl 32.

In another embodiment, FIG. 3 shows a hose 10
In order to connect the hose 10 to the hose 10, a pair of nipples 14, 14 are provided in the cylinder 12 in a symmetrical shape with their bases common. This was established in common with the department. Nipple 14, cylinder 12
The material used does not matter.

As described above, according to the present invention, since the contact tongue portion of the seal ring is formed at approximately the same height as the outer wall of the nipple, the inner diameter of the hose is approximately the same as the outer diameter of the nipple, and the seal ring is in close contact with the hose nipple. The hose can be attached smoothly, and when the hose presses on the pressed portion, the contact tongue portion bulges outward due to the action of the lever and comes into close contact with the inner wall of the hose, resulting in a complete seal. That is, in the present invention, a nipple-type joint allows a lip-type seal ring to be used without the seal ring slipping out of the seal groove, and the sealing effect can be improved.

Although the present invention has been variously explained above with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIGS.
Figure 4 is a vertical cross-sectional view of the hose joint, Figure 2
The figure is a partially cutaway end view of the seal. FIG. 5 is an explanatory diagram of a conventional joint, and FIG. 6 is an explanatory diagram of a case where a rubber cup is used as a seal ring. 10...Hose, 12...Cylinder, 14...
Nipple, 16...Air circulation hole, 18...Seal groove, 20...Seal, 22...Pressed part, 24...
...Adhering tongue piece, 26... Silencer, 28...
Base, 30...Ring, 32...Lock claw, 34
...Slope portion, 36...Ring-shaped release portion, 38...
Hose release ring.

Claims (1)

[Scope of Claim for Utility Model Registration] A nipple that is tightly inserted into the end of the hose to be connected to attach the hose, a means for preventing the hose from coming off that is secured to the outer periphery of the hose attached to the nipple, and a hose provided on the outer periphery of the nipple. In a hose joint that includes a seal ring that is fitted into a seal groove and comes into close contact with the inner wall of the hose, the seal ring 20 includes a substantially cylindrical main body portion 21 that fits within the seal groove.
and a cylindrical part 23 whose cross section is approximately in the shape of a square, which is integrally connected to the middle part of the outer periphery of the main body part 21 at the apex of the square, and which is opposite to the connecting position. It is formed short and thick in the pressed part 22 which is the part of the cylindrical part 23 on the nipple end side, and the tip is formed on the outer wall 15 of the nipple when the hose is not attached.
The outer wall of the contact tongue piece 24, which is set to protrude further outward than the above-mentioned connection position and is the part on the nipple end side, is approximately at the same height as the outer wall 15 of the nipple when the hose is not attached. What is claimed is: 1. A hose joint characterized in that the hose joint is configured such that the wall thickness becomes thinner toward the tip.