JPH09264479A - Quick joint type coupler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent that a coupler fully comes off from a pipe, even when the coupler is mounted in a half lock state. SOLUTION: This coupler is constituted so as to become in a free state in which a lock ball 24 and guide ball 26 positioned so as to be able to move to a diameter direction for this socket 10 can move to the outer, direction of a socket 10 by the slide operation of a sleeve 30 assembled on the outer periphery of the socket 10 against a spring force and so that the lock ball 24 can be regulated so as not to be moved by the release of said operation force for the sleeve 30 to the outer direction of the socket 10. In this case, the guide ball 26 is regulated so as not to be moved to the outer direction of the socket 10, in a released state of the slide operation force for the sleeve 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quick joint type coupler constructed so that it can be attached to and detached from a pipe with one touch for the purpose of temporarily closing the open end of the pipe.

[0002]

2. Description of the Related Art FIG. 3 is a sectional view showing a part of a conventional quick joint coupler. As shown in this drawing, the lock ball 124 and the guide ball 126 are positioned in the socket 110 of the coupler so as to be movable in the radial direction. A sleeve 130 is attached to the outer periphery of the socket 110 so as to be slidable along its axis. As shown in FIG. 3 (A), the sleeve 130 is pushed to the left by the force of the sleeve spring 136 in the normal state, and the balls 12 are
4, 126 are in a free state in which they can enter the respective escape grooves 132, 134 formed on the inner circumference of the sleeve 130.

In this state, when the pipe 140 to be fitted with the coupler is relatively inserted into the socket 110, as shown in FIG.
The end portion of is contacted with the gasket 116, and the gasket guide 114 is pushed rightward against the elasticity of the seal spring 120. As a result, the lock ball 124 receives the force of the sleeve spring 136.
The action of 30 pushes the relief groove 132 inward. As a result, the pipe 140 and the coupler are held in the connected state via the lock balls 124.

[0004]

By the way, when the coupler is mounted on the pipe, the mounting state of the coupler is as shown in FIG. 3 (B) due to a mounting error or abrasion of the inner peripheral surfaces of the lock ball 124 and the sleeve 130. ), That is, the lock ball 124 is not completely out of the escape groove 32, and the lock ball 124 may be incompletely engaged with the convex portion 142 of the pipe 140. is there. In this half-locked state, the coupler may be disengaged from the pipe 140 due to vibration or fluid pressure (water pressure) from the pipe 140.

An object of the present invention is to restrict the guide ball to a position that prevents the socket and the pipe of the coupler from being disengaged in a normal state, so that even if the coupler is mounted in the half-locked state, the coupler can be piped. It is to prevent the situation of being completely disengaged from.

[0006]

According to a first aspect of the present invention, a sleeve mounted on the outer periphery of a socket is slid against a spring force to be positioned so as to be movable in a radial direction with respect to the socket. The lock ball and guide ball are in a free state where they can move outward in the socket, and the lock ball is restricted from moving outward in the socket by releasing the operating force on the sleeve. It is characterized in that the guide ball is regulated so that the socket cannot move outward when the sliding operation force on the sleeve is released.

Therefore, when the coupler is mounted on the pipe to be mounted and the sleeve is slid to the predetermined position by the spring force, the guide ball cannot move outward from the socket, that is, It is held in a state of protruding inward. Therefore, even if the coupler and the lock ball are disengaged due to vibration or the like when the coupler is mounted in the half-locked state due to vibration, etc. It will engage with the lock ball. This prevents the coupler from coming off the pipe completely.

[0008]

Embodiments of the present invention will be described below. FIG. 1 is a sectional view showing a part of a quick joint type coupler. The socket 10 of this coupler is formed in a cylindrical shape, and one end (left end) thereof is open, but the other end (right end) is closed by a plug member 12. A cylindrical gasket guide 14 is installed inside the socket 10 so as to be movable in a direction along the axis thereof, and a gasket guide is provided at the end of the gasket guide 14 located on the open end side of the socket 10. 16 is fixed.

The plug member 12 and the gasket guide 1
Spring seat 1 formed on each of 4 and
A seal spring 20 is provided between 3 and 15. The gasket guide 14, which receives the elastic force of the seal spring 20, is held at the forward position of FIG. 1 where the step portions 18 of the outer circumference and the inner circumference of the socket 10 are in contact with each other.

The socket 10 is formed with holes 22 and 23 penetrating the inner and outer circumferences thereof at intervals in the axial direction. A lock ball 24 is attached to one hole 22 and a guide ball 26 is attached to the other hole 23 so as to be movable in the radial direction. But both balls 2
Reference numerals 4 and 26 are set so as not to drop into the inside of the socket 10 from the respective holes 22 and 23. The lock ball 24 is received by the outer periphery of the front end of the gasket guide 14 held at the forward position as described above, and the inward movement of the socket 10 is restricted. On the other hand, the guide ball 26 is not restricted by the inward movement of the socket 10.

A sleeve 3 is provided on the outer periphery of the socket 10.
0 is mounted so as to be slidable along its axis. Escape grooves 32 and 34 are formed on the inner circumference of the sleeve 30 so that the lock ball 24 and the guide ball 26 can individually enter. The pitch A of the escape grooves 32 and 34 is set to be larger than the pitch B of the balls 24 and 26. Moreover, the sleeve 30 is pushed in the tip direction (left direction) of the socket 10 by the elastic force of the sleeve spring 36 incorporated between the sleeve 30 and the socket 10. However, at this time, the sleeve 30 is provided with the relief groove 3 for the lock ball 24.
2 is held at the position where it hits, and the guide ball 26 is pushed out of the escape groove 34 so that the socket 10
It is held so that it cannot move outward.

The coupler configured as described above is used, for example, as a stopper for a cooling water supply pipe during a test operation of a vehicle engine. Next, the procedure for using the coupler will be described. First, the sleeve 30 is shown in FIG.
By sliding rightward against the elastic force of the sleeve spring 36 from this state, the guide ball 26 can also enter the escape groove 34 of the sleeve 30 as shown in FIG. As a result, the end of the pipe 40 can be inserted into the socket 10 in order to mount the coupler on the pipe 40 such as engine cooling water.

Then, after the end face of the pipe 40 is brought into contact with the gasket 16, the coupler is further pressed against the pipe 40, and the gasket guide 14 moves from its forward position to the seal spring 20 as shown in FIG. 2B. By moving to the right against the elastic force, the lock ball 24 becomes free to move in the radial direction with respect to the socket 10. If the sliding operation force of the sleeve 30 is released at this point, the sleeve 30 slides to the left by the force of the sleeve spring 36, and reaches the position where it is received by the stopper 38 of the socket 10 as shown in FIG. Retained.

As described above, the sleeve 30 is provided with the stopper 38.
In the state of being received by, the lock ball 24 and the guide ball 26 are both pushed out from the respective escape grooves 32 and 34, and the socket 10 cannot move outward. When the pressing force of the coupler on the pipe 40 side is released, the gasket guide 14 is pushed back by the seal spring 20 toward the forward position, and the convex portion 42 of the pipe 40 is engaged with the lock ball 24 to be in the locked state. The coupler is held connected to the pipe 40. When removing the coupler from the pipe 40, the sleeve 30 may be slid again to the state shown in FIG.

As described above, the coupler is affected by vibration in the half-locked state due to a mistake in mounting the coupler on the pipe 40, etc.
When the lock ball 24 enters the escape groove 32 as shown in (C), the lock is released. However, since the guide ball 26 is regulated so as not to be pushed out from the escape groove 34 and cannot move to the outside of the socket 10, the convex portion 42 of the pipe 40 is formed on the guide ball 26 as shown in FIG. 2C. It engages and prevents the coupler from disengaging from the pipe 40. Therefore, the coupler springs out due to the elastic force of the seal spring 20 or the pipe 40
Water and the like are prevented from squirting out of it.

[0016]

According to the present invention, even if the coupler is mounted in the half-locked state, it is possible to avoid the situation where the coupler is completely disengaged from the pipe due to vibration or the like.

[Brief description of drawings]

FIG. 1 is a sectional view showing a part of a quick joint type coupler.

FIG. 2 is an explanatory diagram showing a procedure for mounting a coupler and a state when half-locked.

FIG. 3 is a sectional view showing a part of a conventional quick joint type coupler.

[Explanation of symbols]

 10 socket 24 lock ball 26 guide ball 30 sleeve

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshio Hidano 2-40 Osu, Naka-ku, Nagoya, Aichi Eizu Kogyo Co., Ltd. (72) Inventor Yoshihisa Matsuda 1-15-2, Nakamachi, Setagaya-ku, Tokyo -No. 301 in Louver Co., Ltd.

Claims (1)

[Claims] 1. A lock ball and a guide ball, which are positioned so as to be movable in a radial direction with respect to the socket, by slidingly operating a sleeve mounted on the outer periphery of the socket against a spring force, It is a quick joint type coupler in which the lock ball is restricted to the outward movement of the socket by releasing the above-mentioned operation force on the sleeve so as to be in a free state capable of moving outward, A quick joint type coupler characterized in that the guide ball is regulated so as not to move outward in the socket in the state of being released.