JPH0234556Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a pipe joint that connects pipes in a detachable manner.

[Prior Art] Conventionally, many pipe fittings of this type have a structure in which a pipe is inserted into a cylindrical body constituting the pipe fitting, and a lock ball provided in the cylindrical body presses the outer periphery of the pipe to fix it. . According to such a pipe joint, the pressure applied to the pipe by the lock ball becomes a point pressure, so the pressure of the lock ball may cause damage such as dents on the outer surface of the pipe, making it impossible to maintain the external shape of the pipe. be. Furthermore, the lock ball is pressed by a sleeve fitted to the outer periphery of the cylinder, but when inserting the pipe, it is necessary to operate the sleeve to open the lock ball, which prevents the pipe from entering the pipe joint. The connection work has become troublesome.

[Problems to be solved by the invention] As mentioned above, with conventional pipe joints, the outer surface of the connected pipes may be damaged and the outer shape of the pipes cannot be maintained. The problem is that the connecting operation is troublesome.

In view of the above points, this invention provides a pipe joint that can reliably connect pipes without causing any damage to the outer surface of the pipes, and also allows pipes to be connected with one touch.

[Means for solving the problem] In order to achieve the above object, this invention divides the front part of the main cylinder into three or more parts with slots formed in the axial direction, and A sliding cylinder with a sealing member is fitted to the front part that is pressed forward by a compression spring, and a ball is provided to be able to move in and out of the main cylinder in a centrifugal direction, and a groove is provided on the outer periphery of the sliding cylinder. Further, a sleeve biased forward by a spring is fitted on the outer periphery of the main cylinder, and the outer periphery of the front part of the main cylinder is attached to the front part of the inner peripheral surface of the sleeve in a centripetal direction. A concave portion for locking the ball was provided at the rear of the tapered surface to be pressed.

[Operation] When the sleeve is moved backward against the spring, the pressure on the front outer periphery of the main cylinder body by the tapered surface formed on the inner circumferential surface of the sleeve is released, and the recess provided at the rear of the inner circumferential surface of the sleeve is When the ball reaches above the ball provided in the cylindrical body, the ball is released from being held in the centripetal direction by the inner peripheral surface of the sleeve. As a result,
The sliding tube fitted into the main cylinder is released from the ball that was engaged with the groove provided on its outer periphery, and is pushed up in the centrifugal direction of the ball by the compression spring and moved forward. The ball pushed up in the centrifugal direction by the sliding tube engages with the recess in the front sleeve, and the sleeve is fixed in the retracted position. Normally, when the pipe is disconnected, it is on standby in this state. If you insert the pipe from the front of the main cylinder in this state,
The tip of the pipe comes into contact with the front surface of the sliding tube, causing the sliding tube to move backward against the compression spring. Due to this backward movement of the sliding tube, when the groove of the sliding tube reaches below the ball, the ball engages with the groove,
As a result, the sleeve released from the ball is moved forward by the spring, and the tapered surface presses the front part of the main cylinder in the centripetal direction, and the front part of the main cylinder is pressed and comes into pressure contact with the outer periphery of the pipe. Connect and fix. Since the front part of the main cylinder body and the pipe are in surface contact, the outer surface of the pipe pressed against the front part of the main cylinder body is not damaged.

[Example] This invention will be described in detail below based on an example shown in the drawings, but this invention is not limited to the example.

In the drawing, 1 is a main cylinder, and the front part of this main cylinder 1 has a slot 2 formed in the axial direction.
It is divided into parts, and each divided piece 3 divided into 4 parts
Projecting surfaces 4 and 5 are formed on the inner and outer surfaces of the tip, respectively.

The main cylinder 1 also has a hole 6 behind the slot 2.
A ball 7 is loosely fitted into the hole 6 so as to be able to move in and out in the centrifugal direction. A sliding tube 8 is fitted inside the main cylinder 1, and the sliding tube 8 is pressed forward by a compression spring 9. 10 is a seal member provided on the front surface of the sliding tube 8, and 11 is a groove formed on the outer periphery of the sliding tube 8, with which the ball 7 engages. Reference numeral 12 denotes a sleeve fitted around the outer periphery of the main cylinder 1, and this sleeve 12 is urged forward by a spring 13. The front part of the inner periphery of this sleeve 12 is pressed against the protruding surface 5 of the divided piece 3 formed by the slot 2 in the front part of the main cylinder 1, so that the front part of the main cylinder 1 is centripetal from the outer periphery. A tapered surface 14 that presses in the direction is formed. Further, a recess 15 for locking the ball 7 is formed at the rear of the inner circumference of the sleeve 12. 16 is a sealing member, 17 is a valve body,
18 is a spring.

Reference numeral 19 denotes a pipe connected to the pipe joint constructed as described above, and this pipe 19 has a bulge 20 at its tip.

When the sleeve 12 is moved rearward (to the left in the figure) against the spring 13, the pressure on the front outer periphery of the main cylinder 1 by the tapered surface 14 is released, and the recess 15 provided in the sleeve 12 is When reaching above the ball 7 provided on the cylindrical body 1, the ball 7 is released from being pressed in the centripetal direction by the inner peripheral surface of the sleeve 12. As a result, the sliding tube 8 fitted into the main cylinder 1 is released from the ball 7 that was engaged with the groove 11 provided on its outer periphery, and the compression spring 9 pushes the ball 7 in the centrifugal direction. move forward. The ball 7 pushed up in the centrifugal direction by the sliding tube 8 enters the recess 15 of the sleeve 12.
, and the sleeve 12 is fixed in the retracted position. Normally, when the pipe 19 is disconnected, it is on standby in this state. When the pipe 19 is inserted from the front of the main cylinder 1 in this state, the bulge 2 of the pipe 19
0 enters the main cylinder body 1 by pushing apart the front divided piece 3, and the tip of the pipe 19 comes into contact with the front side of the sliding cylinder 8, causing the sliding cylinder 8 to move against the compression spring 9. Then, the projecting surface 4 of the divided piece 3 of the main cylinder 1 passes over the bulge 20 of the pipe 19 and comes into surface contact with the outer periphery of the pipe 19 behind the bulge 20. By moving the sliding tube 8 backward,
When the groove 11 of the sliding tube 8 reaches below the ball 7,
The ball 7 engages with the groove 11 and the sleeve 12
from the recess 15. As a result, the sleeve 12 released from the ball 7 is moved forward by the spring 13, and the elasticity of the spring 12 causes the tapered surface 14 to press the protruding surface 5 of the divided piece 3 of the main cylinder 1 in the centripetal direction. As a result, the outer peripheral surface of the pipe 19 inserted into the main cylinder 1 is brought into pressure contact with the front inner peripheral surface of the main cylinder 1, and the pipe 19 is connected and fixed to the main cylinder 1. At the same time, the divided piece 3 of the front part of the main cylinder 1
The end of the protruding surface 4 is engaged with the rear end of the bulging portion 20 of the pipe 19, and the pipe 19 is prevented from slipping out from the main cylinder 1. Further, since the front part of the main cylinder 1 and the pipe 19 are in surface contact, the outer surface of the pipe 19 pressed against the front part of the main cylinder 1 is not damaged.

The main cylindrical body 1 shown in the above embodiment may be made of either metal or synthetic resin, but if it is made of synthetic resin, damage to the outer surface of the pipe 19 can be more reliably prevented.

[Effects of the invention] As described above, according to this invention, the front part of the main cylinder is divided into three or more parts with slots formed in the axial direction, and the inside of the main cylinder is equipped with a compression spring that extends forward. A sliding cylinder having a sealing member is fitted to the front part to be pressed, and a ball provided on the main cylinder so as to be retractable in a centrifugal direction is engaged with a groove provided on the outer periphery of the sliding cylinder, Furthermore, a sleeve biased forward by a spring is fitted onto the outer periphery of the main cylinder, and furthermore, a tapered surface is provided on the inner peripheral surface of the sleeve to press the outer periphery of the front part of the main cylinder in a centripetal direction. Since a recess is provided at the rear part to lock the ball, when the pipes are unconnected, the sleeve can be moved backwards against the spring and fixed by the ball. The pipes can be reliably connected and fixed with a simple operation such as simply inserting a Since the tapered surface of the sleeve presses in the centripetal direction, no more force than necessary is applied to the outer circumference of the pipe, and since the pressure applied to the outer surface of the pipe is surface pressure, when connecting the pipes, The effect is that there is no risk of damaging the outer circumferential surface of the pipe.

[Brief explanation of drawings]

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 pipes are connected to a pipe joint according to this invention, and Fig. 3 is a partially longitudinal side view showing a state in which pipes are connected to a pipe joint according to this invention. FIG. 3 is a partially longitudinal side view showing the state. 1...Main cylinder, 2...Slot, 7...Ball,
8...Sliding tube, 9...Compression spring, 10...
Seal member, 11...Groove, 12...Sleeve, 1
3...Spring, 14...Tapered surface, 15...
...concavity.

Claims (1)

[Scope of utility model registration request] The front part of the main cylinder is divided into three or more parts with slots formed in the axial direction, and inside the main cylinder there is a sliding cylinder with a seal member on the front part that is pressed forward by a compression spring. When fitted, the ball provided in the main cylinder body so as to be retractable in a centrifugal direction engages with the groove provided on the outer periphery of the sliding cylinder, and the outer periphery of the main cylinder body is further biased forward by a spring. A pipe joint into which a sleeve is fitted, and the inner peripheral surface of the sleeve is provided with a tapered surface in the front part that presses the outer periphery of the front part of the main cylinder in a centripetal direction, and a recessed part in the rear part that locks the ball.