JPH0798087A - Pipe fitting - Google Patents

Abstract

(57) [Abstract] [Purpose] By making the valve built into the socket compatible with both plugs without a valve and plugs with a valve, the manufacturing of the socket can be reduced, and handling is also possible. To facilitate. [Structure] A forward end of a valve 5 provided in a fluid passage 3 of a socket 1 that moves forward to close and retreat the fluid passage 3 contacts the tip of a plug 2 when the socket 1 and the plug 2 are connected. The pressure receiving portion 11 that is pressed by the push rod 13 and the push rod 13 that enters the plug 2 and contacts the valve 34 built in the plug 2 and presses each other are provided in a protruding manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint of a type in which a valve built in a socket is pushed by the plug and retracts to open a fluid passage when the socket and the plug are connected.

[0002]

2. Description of the Related Art In a pipe joint of the above type, a socket having a built-in valve having a different structure is prepared depending on the type of plug connected to the socket. That is, there are two types of plugs, one without a valve and one with a valve. In the case of a plug without a valve, the tip of the valve built in the socket has a pressure receiving portion that is pressed against the tip of the plug. , It is configured to be pushed by the tip of the plug at the time of connection to retract and open the fluid passage. On the other hand, in the case of a plug with a valve, the pressure rod that contacts the valve of the plug at the time of connection is attached to the tip of the valve built into the socket. The valve of the socket and the valve of the plug are pushed against each other at the time of connection to retreat to open the fluid passage.

As described above, conventionally, the socket of this type of pipe joint has a different structure of the built-in valve depending on the type of the plug to be connected, and the plug with the valve is connected to the socket for connecting the valveless plug. However, even if a plug without a valve is connected to the socket for plugging with a valve, the valve in the socket will not open.

[0004]

As described above, in the conventional pipe joint, a socket having a built-in valve corresponding to the case where the plug to be connected has no valve and the case where the plug has a valve is prepared. Had to do. For this reason,
It was troublesome to manufacture the socket, and the handling was troublesome.

In view of the above points, the present invention enables a socket built-in valve to be compatible with a plug without a valve and a plug with a valve, thereby saving labor in manufacturing the socket. (EN) A pipe joint intended to facilitate handling and the like.

[0006]

In order to achieve the above object, the present invention provides a socket and a plug at the forward end of a valve provided in a fluid passage of a socket for advancing to close and retreat the fluid passage. At the time of connection, a pressure receiving portion which abuts against the tip of the plug and is pressed, and a pressing rod which comes into the plug and abuts against a valve built in the plug and presses each other are projected.

[0007]

When the plug without a valve is inserted into the socket, the tip of the plug abuts against the pressure receiving portion projecting from the tip of the valve built into the socket and presses it. Open the fluid passage in the socket. When a plug with a valve is inserted into the socket, the pressure rod protruding from the tip of the valve built into the socket enters the plug, abuts against the valve built into the plug, pushes back against each other, and retreats each fluid. Open the aisle.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. In the drawings, 1 is a socket and 2 is a plug connected to the socket 1. 3 is a fluid passage formed in the socket 1, 4 is a valve seat provided in the fluid passage 3, and 5 is a valve movably provided in the fluid passage 3. It is designed to be closed, retracted and opened.

The valve 5 is provided with a valve head 7 which is urged by a spring 6 in the distal direction and contacts the valve seat 4 to close the fluid passage 3. An annular groove 8 is formed on the outer periphery of the valve head 7, and an O-ring 9 for sealing is fitted in the annular groove 8. Further, a stopper 7'for preventing the O-ring 9 from being unnecessarily pressed by the spring 6 is provided on the rear side of the annular groove 8. The spring 6
In this case, one end thereof is locked to the valve receiver 10 fixedly provided in the fluid passage 3 in the socket 1. The valve receiver 10 controls the amount of retreat against the elastic force of the guide of the valve 5 and the spring 6.

Reference numeral 11 denotes a pressure receiving portion which is provided at the tip of the valve head 7 of the valve 5 so as to project in the forward direction of the valve 5, and which contacts the tip of the plug 2 inserted into the socket 1 when the socket 1 and the plug 2 are connected. The valve 5 is brought into contact with the valve 5 and retracted by receiving the pressure of the plug 2. The pressure receiving portion 11 is formed in a tubular shape having a diameter slightly larger than the inner diameter of the tip of the plug 2, and the open tip and the tip of the plug 2 come into contact with each other. On the side wall of the pressure receiving portion 11 formed in a tubular shape, a hole 12 through which a fluid passes is formed.

Reference numeral 13 is the valve 5 as in the pressure receiving portion 11.
Is a pressing rod projecting in the same direction as the pressure receiving portion 11 at the tip of the valve head 7, and enters the plug 2 inserted into the socket 1 when the socket 1 and the plug 2 are connected, and the valve built in the plug 2 Abutment and push against each other valve 5 in socket 1
And the valve of the plug 2 is retracted. The pressing rod 13 is provided inside the cylindrical pressure receiving portion 11 at a substantially central position, and a sufficient space 14 is formed between the pressing rod 13 and the side wall of the pressure receiving portion 11 for allowing fluid to pass therethrough. There is.

Reference numeral 15 denotes a lock mechanism for locking the plug 2 inserted in the socket 1, which has the following structure. A through groove 16 is formed at the tip of the socket 1, and an engaging groove 17 formed on the outer periphery of the plug 2 is formed in the through groove 16.
A locking member 18 that is locked to is fitted in the centrifuging direction so as to be retractable. Further, on the outer periphery of the socket 1, a locking projection 1 is located at the rear side of the through groove 16 and is locked to an elastic locking piece of a sleeve described later to hold the sleeve in the retracted position.
9 is formed, and a through groove 20 is formed on the rear side of the locking projection 19. The tapered surface 21 formed on the outer circumference of the plug 2 pushes the through groove 20 in the centrifugal direction, and the upper portion of the groove protrudes to the outer circumference of the socket 1 and the elasticity of the sleeve locked to the locking projection 19 is provided. A pressing member 22 that pushes up the locking piece to remove it from the locking projection 19 is fitted so as to be retractable in the centrifuging direction.

The outer periphery of the socket 1 is urged by the spring 23 in the connecting direction (on the tip side), moves forward to press the locking member 18 in the centripetal direction, and retracts to release the pressing force of the locking member 18. A sleeve 24 is fitted so as to be slidable in the axial direction. The front portion of the sleeve 24 slidably contacts the outer peripheral surface of the socket 1 on the inner peripheral surface thereof, and the locking member 18
Is a pressing / releasing part 27 in which a pressing part 25 for pressing in the centripetal direction and a releasing part 26 for releasing the pressing of the locking member 18 are formed.

A notch groove 28, which is slightly wider than the locking projection 19 in the axial direction, is formed in the pressing / releasing portion 27 at a position corresponding to the locking projection 19 formed on the outer periphery of the socket 1, and the notch is formed. An elastic locking piece 29 is provided in the groove 28 in the axial direction. This elastic locking piece 29 is
When the locking member 18 is moved backward and the locking member 18 is positioned at the release portion 26 of the pressing / releasing portion 27, the tip of the locking member 18 is locked by the locking projection 19 to prevent the sleeve 24 from moving forward, and the spring 23 springs. The sleeve 24 is held in the retracted position against the force and has an elastic force in the centripetal direction, and is pushed in the centrifugal direction by the pressing member 22 of the socket 1 to expand in the same direction. The tip of the lock projection is disengaged from the locking projection 19.

The elastic locking piece 29 is formed such that its thickness is thinner than that of the pressing / releasing portion 27, its lower surface is above the lower surface of the pressing / releasing portion 27, and its upper surface is pressing / releasing. It is lower than the upper surface of the portion 27. The distance between the lower surface of the elastic locking piece 29 and the lower surface of the pressing / releasing portion 27 is the height of the locking projection 19 with which the tip of the elastic locking piece 29 is locked. At the tip of the elastic locking piece 29, a locking head 30 is formed which bulges downward and locks on the locking projection 19. In addition, the gap between the upper surface of the elastic locking piece 29 and the upper surface of the pressing / releasing portion 27 is determined by the elastic locking piece 29.
Even if the locking head 30 at the tip of the pressing head 30 spreads until it is disengaged from the locking projection 19, the upper surface thereof is pressed and released by the pressing / release portion 27.
The spacing is such that it does not extend above the upper surface of the.

Reference numeral 31 denotes a cover fitted to the outer periphery of the front portion of the sleeve 24, which prevents the pressing / releasing portion 27 from expanding. Although the lock mechanism 15 of this embodiment has the above-mentioned configuration, the lock mechanism 15 is not limited to this configuration. Reference numeral 32 is an O-ring that seals between the socket 1 and the plug 2.

Next, the connection between the socket 1 and the plug 2 shown in the above embodiment will be described. First, the case where the plug 2 (a) without a valve is connected to the socket 1 will be described. When the plug 2 (a) is inserted into the socket 1, the tip of the plug 2 (a) comes into contact with the pressure receiving portion 11 projecting from the tip of the valve head 7 of the valve 5 built in the socket 1, and the plug 2
By continuing the insertion of (a), the pressure receiving portion 11 is pressed, and the valve 5 retreats against the elastic force of the spring 6,
The valve head 7 is separated from the valve seat 4, and the fluid passage 3 in the socket 1 is opened, whereby the fluid passage 3 of the socket 1 and the plug 2 are opened.
Fluid passages 33 communicate with each other (FIG. 4). In the embodiment, the pressure receiving portion 11 is described as being formed in a tubular shape, but the shape is not limited to this as long as it is a shape that presses the tip of the plug 2 when the plug 2 is inserted and allows the fluid to pass therethrough.

Next, the socket 1 is provided with a plug 2 having a valve.
The case where (b) is connected will be described. Plug 2
In (b), the valve 34 is movably provided in the fluid passage 33. The valve 34 is biased in the distal direction by a spring 35, and moves forward in the distal direction so that the valve head 36 of the valve 34 comes into contact with a valve seat 37 formed in the fluid passage 33, closes the fluid passage 33, and retracts. It is supposed to open.

A plug 2 incorporating the above-mentioned valve 34
When (b) is inserted into the socket 1, the pressing rod 13 protruding from the tip of the valve head 7 of the valve 5 built in the socket 1 enters the plug 2 (b) through the tip opening of the plug 2 (b),
It contacts the valve head 36 of the valve 34 of the plug 2 (b). By continuing to insert the plug 2 (b), the valve 5 of the socket 1 and the valve 34 of the plug 2 (b) push against each other, and move backward against the resilience of the springs 6 and 35. The valve head 7 of the valve 5 is separated from the valve seat 4 and the fluid passage 3 in the socket 1 is opened.
The valve head 36 of the valve 34 of FIG.
The fluid passage 33 of the socket 1 opens, and the fluid passage 3 of the socket 1 and the fluid passage 33 of the plug 2 (b) communicate with each other (FIG. 5).

[0020]

As described above, according to the present invention, regardless of whether the plug connected to the socket has no valve or has a valve, when the socket and the plug are connected,
It is possible to open the valve in the socket, and if the plug has a valve, the valve in the socket and the valve in the plug can be opened, so it is not necessary to change the configuration of the valve of the socket according to the type of the valve, As a result, the manufacturing of the socket can be saved, the cost of the pipe joint can be reduced, and the pipe joint can be handled easily.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention.

FIG. 2 is an enlarged plan view of the valve shown in FIG.

3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a vertical sectional side view showing a connection state with a plug without a valve.

FIG. 5 is a vertical sectional side view showing a connection state with a plug having a valve.

[Explanation of symbols]

1 ……………………………………………………………………
…………… Socket 2 ………………………………………………………………
…………… Plug 3 ………………………………………………………………
…………… Fluid passage 5 ………………………………………………………………
…………… Valve 11 ………………………………………………………………
…………… Pressure receiving part 13 ………………………………………………………………
…………… Pressing rod 34 ……………………………………………………………………
……………valve

Claims (1)

[Claims] 1. A pressure receiving member, which is provided in a fluid passage of a socket, is pushed forward by abutting against a tip of a plug when a socket and a plug are connected to a forward end of a valve which is moved forward to close and retreat to open the fluid passage. A pipe joint that has a protrusion and a pressing rod that comes into contact with the valve inside the plug and presses them against each other.