JPS6120759B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a one-touch type pipe joint, which is particularly used in high-pressure hydraulic circuits, and consists of a nipple and a coupler, both of which automatically connect when disconnected. The present invention relates to a pipe joint that has a built-in valve mechanism that is closed and can be attached and detached with a single touch.

[Prior art]

Conventionally, various types of pipe joints have been known, but they are such that when the nipple and coupler are disconnected and then reconnected, the residual pressure remaining in both pipe systems is released into the nipple. , the valve portion of each coupler is pressed, making it difficult to connect (fit) the nipple and coupler. In other words, the nipple and coupler cannot be connected just by pressing them together with normal force.

Therefore, with conventional pipe joints, in such cases, the valve members installed inside the nipple and coupler are forcibly opened by hitting them with a hammer, thereby releasing the residual pressure. . However, such handling may damage the valve member and may also cause the O-ring to be discharged to the outside together with the released residual pressure.

Another way to release residual pressure is to operate a hydraulic device to which the tips of nipples and couplers are attached, but this requires extremely complicated operations and is not very practical. .

In this way, with conventional pipe joints, when there is residual pressure in the nipple or coupler, it takes time and effort to release the residual pressure, and the operation is manual, so it requires skill to handle and the valve mechanism It had drawbacks such as the risk of damaging the.

[Problem that the invention seeks to solve]

The present invention aims to eliminate these drawbacks of conventional pipe joints, and the pipe joint of the present invention is capable of connecting the nipple and the coupler even if residual pressure exists in both the nipple and the coupler. The feature of this method is that it can be easily performed.

[Description of Examples]

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

FIG. 1 is a side sectional view of the nipple 10 before it is fitted with a coupler. In Figure 1, 1
1 is a hollow cylindrical body, and an adapter 12 is attached to the right side of the body 11. As shown in FIG. 2, the adapter 12 consists of a large diameter portion 13 on the right end side and a cylindrical member 14 following this, and a hollow portion 15 within the large diameter portion 13 is a passage bored in the cylindrical member 14. 16, and a radial hole 17 is bored at the end of the passage 16 (the left end in FIG. 2).

The cylindrical member 14 of the adapter 12 extends inside the body 11 with a space 18 therebetween, and is a sleeve made of an annular member that slides while being guided by the outer peripheral surface of the cylindrical member 14 and the inner peripheral surface of the body 11. 19 is provided within the body 11. A spring 20 is provided in the space 18 and presses the sleeve 19 outward (leftward in FIG. 1). 21, 22, and 23 indicate O-rings. 24
is the inner hollow part of the sleeve 19.

FIG. 3 is a side sectional view of the coupler 30, showing the state before fitting with the nipple. In FIG. 3, 31 is a hollow cylindrical body.
An adapter 32 is attached to the left side of the adapter.
The adapter 32 has a structure similar to that of the nipple adapter 12, and includes a large diameter portion 33 and a cylindrical member 3.
4. It consists of a hollow part 35, a passage 36, and a hole 37.

Reference numeral 39 denotes a sleeve, which, like the sleeve 19 of the nipple described above, connects the outer peripheral surface of the cylindrical object 34 and the body 31.
The sleeve 3 is installed in the body 31 so as to be guided and slid by the inner peripheral surface of the sleeve 3.
A spring 40 is provided to press 9 to the right.
41 and 42 are O-rings, 44 is an inner hollow part of the sleeve 39, and 45 is a sphere, which is used when the nipple 10 and coupler 30 are connected (see Fig. 6).
46 is a ring that presses the sphere 45;
is its spring.

Note that since the nipple 10 and the coupler 30 are joined in a coupled state as shown in FIG. 6, the dimensions of their bodies, sleeves, etc. are as follows.
They are in a relationship that allows them to fit into each other. A detailed explanation of the dimensional relationship between the two will be omitted.

In the pipe joint of the present invention, when the nipple 10 and the coupler 30 are separated from the joined state shown in FIG.
The sleeve moves outward with a restoring force of 40, and the sleeve
7, 37 to automatically prevent fluid from flowing out. (When the two are separated, each member is
The state will be as shown in Fig. 3).

When reconnecting the two sleeves from this state, the sleeves 19 and 39 are sealed by the O-ring 21 provided inside the tip of the sleeve 19, and the outer ends of each sleeve press against the outer ends of the other sleeves. (see Figure 4) move the sleeve inward (see Figure 5),
When the connection is completed, both sleeves 19, 39 are in the state shown in FIG. 6. At this time, the contact surfaces of both sleeves are kept sealed by the O-ring 21, so when the holes 17 and 37 are open and fluid flows between the two holes, a portion of the fluid flows between the sleeves. There is no risk of leakage from the contact surface. That is, the sleeves 19, 39 move inward and open the holes 17, 39.
37 is opened to allow fluid to flow in the direction of the arrow. During this reconnection operation, the sleeve 19,
39 are pushed against each other and moved in the reverse direction, but the residual pressure present in the nipples and couplers is not acting on the sleeves 19, 39. This is because the back surfaces of the sleeves 19, 39 Space 18, 38
This is because the spaces 18 and 38 are completely blocked off from the fluid passage by an O-ring, and are configured so that no fluid pressure acts on the spaces 18 and 38. Thus, in the pipe joint of the present invention, no pressure fluid remains when connected. Even if the pressure is on, the connection operation will not be affected by the pressure.

As described above, according to the present invention, the function of shutting off and connecting fluid (valve function) is provided inside the pipe joint.
This is accomplished by a sleeve, and the sleeve is moved in a space isolated from fluid pressure, so even if there is residual pressure when connecting a pipe joint, the movement of the sleeve due to the connection will not occur. The connection operation of the pipe joint can be performed smoothly without being affected by residual pressure, and the drawbacks of the conventional example described at the beginning of this specification can be overcome.

In addition, according to the present invention, during connection, the sleeves of the coupler and nipple pass through the holes at the tip of the adapter, opening the fluid passage, and when the residual pressure oil begins to move, the O-rings installed on the joint surfaces of both sleeves have already been removed. Since it is configured so that it can be heard, it has the effect that there is no risk of residual pressure oil spouting out to the outside.

7 to 8 show examples of O-rings provided in the sleeve 39, in which the O-ring 42 has a triangular cross section, and the sleeve 39 is divided into a main body 39a and a sub-body 39b that is screwed into the main body 39a. Subbody 39b
Accordingly, the O-ring 42 having a triangular cross section is held between the O-rings 42, and this structure prevents the O-rings 42 from popping out, and is particularly applicable to the sleeve of the pipe joint of the present invention. It has a great effect.

[Brief explanation of the drawing]

Figure 1 is a side sectional view of the nipple, Figure 2 is a perspective view of the adapter, Figure 3 is a side sectional view of the coupler, and Figures 4 and 5 show how the nipple and coupler fit together. FIG. 6 is a sectional side view of the nipple and coupler in a coupled state, and FIGS. 7 and 8 are diagrams showing two ways of attaching the O-ring to the sleeve. 10: Nipple, 11: Body, 12: Adapter, 13: Large diameter part, 14: Cylindrical object, 15: Hollow part, 16: Passage, 17: Radial hole, 18: Space, 19: Sleeve, 20: Spring, 21-23:
O-ring, 30: coupler, 31: body, 32:
Adapter, 33: Large diameter part, 34: Cylindrical object, 3
5: Hollow part, 36: Passage, 37: Radial hole,
38: Space, 39: Sleeve, 40: Spring, 4
1, 42: O-ring, 45: ball.

Claims (1)

[Claims] 1. In a pipe joint consisting of a nipple 10 and a coupler 30; has a hollow part 15 inside, and the cylindrical body 14 has a hollow part 15 inside.
an adapter 12 having a passage 16 communicating with the hollow part 15 and a radial hole 17 at its end;
A sleeve 19 that is slidably provided in the body while being guided by the outer circumferential surface of the cylindrical member 14 and the inner circumferential surface of the body 11, and O-rings 22 and 23 that are provided at sliding locations between the sleeve and the adapter. The coupler 30 consists of a hollow cylindrical body 31, a large diameter portion 33, and a cylindrical member 34 following this, the large diameter portion 33 having a hollow portion 35 inside, and the cylindrical member 34 having:
an adapter 32 having a passage 36 communicating with the hollow part 35 and a radial hole 37 at its end;
A sleeve 39 that is slidably provided in the body while being guided by the outer peripheral surface of the cylindrical member 34 and the inner peripheral surface of the body 31, and O-rings 41 and 42 that are provided at sliding locations between the sleeve and the adapter. another O-ring 21 provided on the joint surface of one of the sleeves 19, 39 with the other sleeve; and an O-ring 21 that always urges the sleeves 19, 39 outward, and It consists of separate springs 20, 40 for closing the holes 17, 37 by the sleeves; when the nipple and coupler are connected, both sleeves are in such a relationship that their outer ends press against the outer ends of the other sleeve. A pipe fitting that is formed into a shape.