JPH0234554Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention relates to a plug for a pipe joint that does not allow the socket and plug to rotate relative to each other when connected.

(Prior Art) A pipe joint with a rotation prevention mechanism that prevents rotational movement of a socket and a plug that can be brought into and out of each other when they are connected is known, for example, as described in Japanese Utility Model Publication No. 5183/1983. It is.

Since the socket and plug do not rotate during connection, the above conventional example is not a valuable device for taking advantage of the features of the quick pipe joint, which consists of a socket with a locking ball and a plug with an outer circumferential groove that engages with the ball. However, since it has a structure in which rotation is prevented by the action of a stop ring, it is inevitable that it will rotate somewhat due to the elasticity of the stop ring, and it has the disadvantage that the fixing force is weak.

(Problems to be Solved by the Invention) The present invention solves this problem in view of the fact that with the above-mentioned conventional plugs, it was impossible to firmly prevent the socket and plug from rotating when they were connected. This is an attempt to resolve the issue.

(Means for Solving the Problems) The present invention, as a means to solve the above-mentioned problems, is based on the arrangement of the locking balls on the socket side, in place of the conventional circumferential groove for locking the locking balls of the plug. In total, a plurality of roughly hemispherical holes are provided.

(Function) When connecting a socket and a plug, move the operating ring of the socket back in the direction of arrow A against the elastic force of the compression spring to release the centripetal pressure on the locking ball, and then connect the plug to the socket. When the plug is inserted to the fully inserted position and the locking ball is opposed to the generally hemispherical hole provided on the outer periphery of the plug in the centrifugal direction, the locking ball engages with the hemispherical hole of the plug. Next, when the user releases the operating ring and returns the operating ring to its old position, the operating ring presses the locking ball in the centripetal direction of the socket, and the two are securely connected.

The engagement of the locking ball with the generally hemispherical hole prevents the connected socket and plug from rotating relative to each other.

(Embodiment) The drawings show an example of the plug of the present invention in correspondence with a known socket, and in describing the embodiment of the present invention, the structure of the socket will first be briefly explained.

10 is a socket, 11 is a socket main cylinder, 12
13 indicates a tapered hole provided at the insertion opening end of the plug 1 of the socket main cylinder body 11, and 13 indicates a locking ball fitted into the tapered hole 12. In the drawing, only one tapered hole and one locking ball are shown. No, but
Both 12 and 13 have at least three pieces each, and the number of installed pieces can be increased to four, six, eight, etc. depending on the purpose of use.

Reference numeral 14 denotes an operating ring fitted to the outer periphery of the socket main cylinder 11 so as to be able to freely slide in the axial direction.The operating ring 14 is elastically pushed to the right in the drawing by a compression spring 15, and normally maintains the state shown in the drawing, and its protruding inner periphery The surface 16 presses the locking ball 13 in the centripetal direction of the socket main cylindrical body 11. 1
7 is a space for releasing the locking ball 13, and 18 is an O-ring that seals the outer periphery 2 of the tip end of the plug 1.

For the above socket 10, the plug 1 of the present invention
The shape of the outer circumferential surface matches the shape of the inner circumferential surface of the socket main cylinder 11, and a locking ball 13 is located at a position adjacent to the outer circumference 2 of the tip part that contacts the O-ring 18.
It has a tapered surface 3 that presses the locking ball 13 in the centrifugal direction, and has a generally hemispherical hole (hereinafter referred to as (referred to as outer peripheral hole) 4 is provided.

The number of outer peripheral holes 4 installed is the same as the number of locking balls 13 installed, or an integral multiple thereof, but in the embodiment, for a socket having three locking balls 13, three times as many, or nine, are installed. It is being

When connecting the plug 1 of the present invention to the socket 10, the operating ring 14 is pulled to the left in the drawing against the elastic force of the compression spring 15, and the locking ball 13
to a free state. In this state, the socket 10 and plug 1 are connected. Locking ball 13 and outer hole 4
Both 1, 1 from the centrifugal direction to the opposing position
0, the locking ball 13 is ready to engage with the outer circumferential hole 4. However, if both 4 and 13 do not engage even after the locking ball 13 is coupled to such an engagement state, for example, the plug 1 If the socket 10 is fixed to a specific device and is fixed to the plumbing hose side and is rotatable relative to the plug, the locking ball 13 can be located at the closest position by slightly rotating the socket around the plug 1. It engages with the outer peripheral hole 4.

If you release your hand from the operation ring 14 in this state, the ring returns to the original position shown in the drawings by the elastic force of the compression spring 15, and the above-mentioned engaged state is maintained.
Then, the plug 1 becomes unable to rotate relative to each other.

(Effects of the invention) With the above structure, the socket and plug of this invention cannot rotate relative to each other when connected, so for example, due to the characteristics of various devices and instruments installed on the plug side, rotational force (load) may be strong. This is extremely effective for connections when the connection is not possible.

Moreover, since the locking balls are locked in individual, generally hemispherical holes, the engagement between the locking balls and the holes is smooth and the engagement is extremely strong, even when any external force is applied. It has the advantage of not rotating.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing an embodiment of the plug of the present invention paired with a known socket. 1...Plug, 4...Semispherical hole (outer hole),
10...Socket, 13...Lock ball.

Claims (1)

[Scope of utility model registration request] In a plug for a pipe fitting that connects and disconnects a plug inserted into the socket by locking and releasing a locking ball provided in the socket by operating an operating ring, the socket is attached to an appropriate position on the outer periphery of the plug. A plug for a pipe joint that has a roughly hemispherical hole corresponding to the locking ball that engages with the locking ball held by the pipe joint.