JPH0237356Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a pipe joint for detachably connecting pipes.

[Conventional technology]

Conventional pipe fittings are equipped with a sleeve that moves forward to connect pipes inserted into a cylindrical body and retreats to release the connection.The sleeve is fitted around the outer circumference of the cylindrical body that constitutes the pipe joint, is always urged in the forward direction by a compression spring and moved forward. Therefore, in order to prevent the sleeve, which is urged in the forward direction by the compression spring, from falling off from the tip of the cylinder, a stop ring for preventing the sleeve from falling off is provided on the outer periphery of the tip of the cylinder. In addition, when connecting a pipe to such a pipe joint, first the sleeve, which is biased by a spring and is moving forward, is moved backward against the elastic force of the compression spring to release the coupling state by the sleeve. It is configured so that the pipe is inserted into the cylindrical body after the operation.

[Problem that the invention attempts to solve]

As mentioned above, according to conventional pipe joints, a stop ring is provided at the tip of the cylindrical body to prevent the sleeve from falling off, which increases the length of the cylindrical body.
In addition, the insertion length of the pipe also becomes longer. Furthermore, when connecting the pipes, it is necessary to move the sleeve, which is biased forward by a spring, backward, and therefore the connecting operation is troublesome.

In view of the above-mentioned problems, the purpose of this invention is to shorten the length of the cylindrical body and the insertion length of the pipe, and to make it possible to connect the pipe with a one-touch operation.

[Means for solving problems]

In order to achieve the above object, this invention provides a pipe joint equipped with a sleeve that allows a pipe inserted into a cylindrical body to move forward under the force of a compression spring and to retreat against the force of the spring.
The cylindrical body is provided with a lock ball so as to be retractable in a centrifugal direction, and the ball is fitted into the cylindrical body and formed on the outer periphery of a sliding cylinder which is urged forward by a compression spring and moves back against the inserted pipe. The inner peripheral surface of the sleeve is configured to engage the ball at a position facing the lock ball when the sleeve is retracted, and to prevent the ball from leaving the recess of the sliding tube. A deep groove is formed to permit forward movement of the sleeve when the ball is placed adjacent to the rear of the deep groove and engaged with a concave portion of the sliding tube. The device has a shallow recess to prevent it from falling off the body.

[Effect]

When the sleeve is moving forward due to the bias of the compression spring, the centripetal side of the lock ball provided on the cylinder engages with the recess formed on the outer periphery of the sliding tube, which is biased forward by another compression spring. The forward movement of the sliding tube is restricted. On the other hand, the distal side of the lock ball engages with the rear end of the shallow recess formed in the inner peripheral surface of the sleeve, thereby preventing the sleeve from falling off from the cylindrical body. In this state, when the sleeve is moved backward against the elastic force of the compression spring and the deep groove formed on the inner peripheral surface of the sleeve is moved above the lock ball, the ball is urged forward by the compression spring. The sleeve is pushed up in the centrifugal direction by the sliding tube and engaged with the deep groove, and the sleeve is held in this locked state by the lock ball. When a pipe is inserted in this state, the sliding cylinder, which had been moving forward due to the compression spring, is pushed back by the pipe and when the recess formed on the outer periphery of this sliding cylinder reaches below the lock ball, the ball is pushed into the recess. As a result, the sleeve moves forward due to the elastic force of the spring, and the pipe inserted into the cylindrical body is connected to the pipe joint.

〔Example〕

This invention will be described in detail below based on embodiments shown in the drawings, but this invention is not limited to the embodiments.

In the drawings, 1 is a cylinder, and 2 is a locking body provided at the front of the cylinder 1. This locking body 2 is pressed in the centripetal direction by a sleeve, which will be described later, to lock the cylinder 1.
The pipe 3 is connected by being pressed against the outer circumferential surface of the pipe 3 inserted into the pipe. A hole 4 is formed in the rear of the locking body 2 of the cylinder 1, and a lock ball 5 is fitted into the hole 4 so as to be retractable in the centripetal direction.

Reference numeral 6 denotes a sliding tube fitted into the cylindrical body 1, and this sliding tube 6 is urged forward by a compression spring 7, and comes into contact with the tip of the inserted pipe 3 and retreats. There is. 8 is a recess formed on the outer periphery of the sliding tube 6, and the lock ball 5 can be engaged with this recess 8. By engaging the lock ball 5 with the recess 8, the sliding tube 6 can move forward. It's becoming regulated.

9 is a sealing material provided on the front surface of the sliding tube 6, and 10 is a sealing material for sealing between the cylindrical body 1 and the sliding tube 6.

Reference numeral 11 denotes a sleeve fitted around the outer periphery of the cylindrical body 1, and this sleeve 11 is urged forward by a compression spring 12. A pressing part 13 is formed at the front of the inner peripheral part of the sleeve 11 to press the locking body 2 provided at the front part of the cylinder body 1 in a centripetal direction from the outer periphery. The pressing portion 13 of the advanced sleeve 11 presses the locking body 2, and the pressing is released when the sleeve 11 retreats. Further, the lock ball 5 is engaged with the inner circumferential surface of the rear part of the sleeve 11 at a position facing the lock ball 5 when the sleeve 11 is retreated and the pressing of the locking body 2 by the pressing part 13 is released. A deep groove portion 14 is formed to allow the sliding tube 6 to separate from the recess 8. Further, the inner circumferential surface of the sleeve 11 is in contact with the rear of the deep groove 14, so that when the sliding tube 6 is retreated and the lock ball 5 engages with the recess 8, the lock ball 5 separates from the deep groove 14 and the sleeve A shallow recess 15 is formed to allow the sleeve 11 to move forward and to prevent the sleeve 11 from coming out of the cylindrical body 1.

Although the locking body 2 is not particularly limited, the locking body 2 of the embodiment shown in FIGS. 1 and 2 has holes 16 and 17 formed in the front part of the cylindrical body 1. The lock balls 1 are inserted into these holes 16 and 17.
The lock balls 18 and 19 are fitted together so as to be retractable in the centrifugal direction, and the lock balls 18 and 19 are pressed in the centripetal direction by the pressing portion 13 of the sleeve 11, and the cylindrical body 1
Pipe 1 is pressed against the outer peripheral surface of pipe 3 inserted into
3 can be connected. Moreover, the locking body 2 of the embodiment shown in FIGS. 3 and 4 is as follows:
The front part of the cylindrical body 1 is divided into four parts with slots 20 in the axial direction, and protruding surfaces 22 and 23 are respectively formed on the inner and outer surfaces of the tip of each divided piece 21, so that the sleeve 11 is not pressed. The portion 13 is formed into a tapered surface, and the pressing portion 13 formed on the tapered surface presses the protruding surface 23 of the divided piece 21 in the centripetal direction, so that the protruding surface 22 is pressed against the outer periphery of the inserted pipe 3. It's becoming like that.

Next, the operation of the above embodiment will be explained. sleeve 1
1 is moving forward by the spring 12, the centripetal side of the lock ball 5 provided on the cylinder body 1 fits into the recess 8 provided on the outer periphery of the sliding cylinder 6, and the forward movement of the sliding cylinder 6 is prevented. The distal side of the lock ball 5 engages with the rear end of a shallow recess 15 formed on the inner peripheral surface of the sleeve 11 to prevent the sleeve 11 from falling off from the cylindrical body 1. . In this state, when the sleeve 11 is retreated against the elastic force of the compression spring 12 and the deep groove 14 formed on the inner circumferential surface of the sleeve 11 reaches above the lock ball 5, the lock ball 5 moves into the deep groove 14. After being engaged, the sliding tube 6 is disengaged from the recess 8 of the sliding tube 6, and the sliding tube 6 moves forward due to the elastic force of the compression spring 7. At the same time, the sleeve 11 is held in this locked state by the lock ball 5 engaged with the deep groove portion 14. Normally, when the pipe 3 is disconnected, it waits in this state.

When the pipe 3 is inserted with the lock ball 5 locked, the tip of the pipe 3 comes into contact with the front surface of the sliding tube 6, causing the sliding tube 6 to move rearward. pipe 3
When the recess 8 formed on the outer periphery of the sliding tube 6, which is retracted, reaches below the lock ball 5, the lock ball 5 engages with the recess 8 and the sleeve 11
It separates from the deep groove part 14 of.

As a result, the sleeve 11 released from the lock ball 5 moves forward due to the elastic force of the compression spring 12, presses the locking body 2 in the centripetal direction by the pressing part 13, and the pipe 3 inserted into the cylindrical body 1 is connected and fixed. Ru.

When separating the pipe 3 connected to the cylinder 1, the sleeve 11 is moved back so that the pressing part 13 releases the pressure on the locking body 2, and on the other hand,
When the deep groove 14 of the retracted sleeve 11 reaches above the lock ball 5, the lock ball 5 engages with the deep groove 14 and separates from the recess 8 of the sliding tube 6, and the sliding tube 6 is moved by the elasticity of the compression spring 7. The force moves forward and pushes the pipe 3 out of the cylinder 1, and at the same time the sleeve 11 is held in the same state by the lock ball 5.

[Effect of idea]

As described above, according to the pipe joint of this invention, the pipe joint is equipped with a sleeve that allows the pipe inserted into the cylindrical body to move forward under the force of the compression spring and to move backward against the force of the compression spring. In the cylinder body, another lock ball is provided so as to be retractable in a centrifugal direction, and this lock ball is fitted into the cylinder body and is urged forward by a compression spring to cause the sliding cylinder to come into contact with the inserted pipe and retreat. The lock ball can be engaged with a recess formed on the outer circumference of the sleeve, and the lock ball can be engaged with the lock ball at a position facing the lock ball when the sleeve is retracted, and the recess of the sliding cylinder of the lock ball can be engaged with the inner peripheral surface of the sleeve. A deep groove is formed to allow the sleeve to move away from the sleeve, and when the lock ball is adjacent to the rear of the deep groove and is engaged with the recess of the sliding tube, the sleeve is allowed to move forward. Since the shallow recess is formed to prevent the sleeve from falling off the cylinder, when the sleeve fitted to the cylinder is moving forward due to the elastic force of the compression spring, the lock ball provided on the cylinder will lock. It engages with a shallow recess formed on the rear circumferential surface of the sleeve to prevent the sleeve from falling off from the cylindrical body. Therefore, unlike conventional pipe joints of this type, there is no need to provide a compression spring around the tip of the cylindrical body, so the length of the cylindrical body can be shortened accordingly.
The insertion length of the pipe can also be shortened. Furthermore, when the pipes are not connected, the sleeve is always held in a retracted state and the locking body is released from pressure, so when connecting the pipes, it is sufficient to simply insert the pipes into the cylindrical body. Also, if you want to separate the connected pipes, just move the sleeve back. As described above, the pipe joint of the present invention has the effect that pipes can be connected and separated with a single touch, and the improved ease of handling has a great practical value.

[Brief explanation of the drawing]

Fig. 1 is a partially longitudinal side view showing an embodiment of this invention, Fig. 2 is a partially longitudinal side view showing a state in which the pipes of the embodiment shown in Fig. 1 are connected, and Fig. 3 is a partially longitudinal side view showing an embodiment of this invention. FIG. 4 is a partially longitudinal side view showing another embodiment, and FIG. 4 is a partially longitudinal side view showing a state in which the pipes of the embodiment shown in FIG. 3 are connected. 1... Cylindrical body, 2... Locking body, 3... Pipe, 5
... Lock ball, 6 ... Sliding tube, 7 ... Compression spring, 8 ... Recess, 11 ... Sleeve, 12
...Compression spring, 14...Deep groove, 15...
Shallow recess.

Claims (1)

[Scope of utility model registration request] In a pipe joint that is equipped with a sleeve that allows a pipe inserted into a cylinder to move forward under the force of a compression spring and to retreat against the force of the spring, the cylinder has another lock ball that is centrifugally attached to the sleeve. The locking ball is fitted into the cylinder and is urged forward by a compression spring, so that it can engage with a recess formed on the outer periphery of the sliding cylinder which comes into contact with the inserted pipe and retreats. A deep groove is formed on the inner circumferential surface of the sleeve to engage the ball at a position facing the lock ball when the sleeve is retracted, and to allow the ball to separate from the recess of the sliding tube. A shallow recess adjacent to the rear of the deep groove allows the sleeve to move forward and prevents the sleeve from falling off from the cylinder body when the ball is engaged with the recess of the sliding tube. A pipe joint formed by forming.