JP2001289382A - Pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent careless separation of a pipe body after joined and identify the pipe body to be completely joined. SOLUTION: A recessed groove B having a lead is provided in the inner face of an outer cylinder 17 and a protruded portion along which the outer cylinder 17 is rotationally slidable is provided on the outer face of a socket 5 so that the pipe body can be separated by rotationally moving the outer cylinder 17 along the recessed groove B having the lead. A female body 1, the socket 5, a spring material 11 and a sleeve 12 are arranged in series to one another in sequence, and a space for a locking member 13 to be moved during the contraction of the spring material 11 and the separation of a male plug 18 is provided in the outer cylinder 17 so that the male plug 18 can be joined or separated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint used for various pipes, faucet fittings and the like, and more particularly to a pipe joint capable of preventing accidental detachment.

[0002]

2. Description of the Related Art Conventionally, pipe joints provided with means for preventing inadvertent detachment have been put into practical use.
There is a pipe joint disclosed in No. 49381. As shown in FIG. 9, the first joint 32 for operating the lock ball is provided on the outer periphery of the socket 31 via a spring 37, as shown in FIG.
However, a second sleeve 34 is provided on the outer periphery of the leading end of the first sleeve 32.
Are fitted slidably, and a substantially annular lock member 35 having a lock piece 36 protruding therefrom is fitted rotatably.

[0003] In the pipe joint constructed as described above,
After connecting the socket 31 and the plug 38, the lock piece 3
The locking member 35 is rotated in a predetermined direction so as to abut against the stopper 33 of the first sleeve 32 to lock. At this time, since the lock piece 36 does not coincide with the escape portion of the first sleeve 32, when the first sleeve 32 is slid in the base end direction of the socket 31, the lock piece 36 is The sliding is prevented by contact.

Conversely, when releasing the connection between the socket 31 and the plug 38, the lock member 35 is rotated to make the lock piece 36 coincide with the escape portion of the first sleeve 32, and the lock is released. Thereafter, the second sleeve 34 is pressed toward the proximal end of the socket 31 and is slid with the first sleeve 32 against the bias of the spring 37. At this time, since the lock piece 36 is fitted into the escape portion of the first sleeve 32, the first sleeve 32 and the second sleeve 34 can slide, and the plug 38 can be pulled out.

[0005]

However, according to the pipe joints already proposed, it is necessary to rotate the lock member 35 in order to prevent the first sleeve 32 from sliding when locked. . For this reason, the rotation operation of the lock member 35 is forgotten, and the lock piece 36 is
It may be used in a state where it does not abut. In addition, it is necessary to confirm each time that the sliding of the lock member 35 is stopped by the stopper 33,
Moreover, the lock member 35 rotates naturally,
A situation in which the robot is rotated by careless operation may be considered.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to prevent an inadvertent detachment of a tubular body, and to provide an automatic operation without an active operation. The connection state is locked and it is possible to confirm that the connection of the pipes has been completed,
Therefore, the incomplete connection of the tubes can be eliminated.

[0007]

SUMMARY OF THE INVENTION The present invention has been developed in order to address the above-mentioned problems in the previously proposed pipe joint, and its structure is as follows. That is, when detaching the tubular body by having a concave groove having a lead on the inner surface of the outer cylinder, and having a convex portion on the outer surface of the socket in which the outer cylinder can slide.
This is a pipe joint that requires the outer cylinder to be rotationally moved, thereby preventing inadvertent detachment of the pipe. A female body having a groove for fitting a seal material on the inner periphery, a socket in which a lock member is loosely fitted and held through a tapered hole, and a slidable outer peripheral portion of the socket at a tip end portion of the socket via a spring material. A sleeve that is fitted and presses the lock member and the outer cylinder forward, and an outer cylinder having a relief portion at the distal end edge is slidably fitted around the outer periphery of the sleeve, and a lock member pressing portion is provided on the outer cylinder. When the connection is established, the plug is inserted into the socket and the locking member is pressed, whereby the locking member is retracted along with the sleeve along the tapered hole, and the locking member escapes into the gap between the outer cylinder and the sleeve. After that, the sleeve is engaged with the annular groove, and is pressed and supported in the centripetal direction by the sleeve that has returned to the outer cylinder.To release the connection, the outer cylinder is rotated and retracted together with the sleeve, and the lock member is moved to the outer cylinder. A pipe joint consisting configured to allowed to release the engagement between the annular groove by missing the relief portion to open from the pressing of the sleeve.

[0008]

Embodiments of the present invention will be described below. FIG. 1 is a cross-sectional view showing a state before coupling of a pipe in a pipe joint, FIG. 2 is a cross-sectional view showing a state after detachment of the pipe, and FIG.
(A) is a sectional view of the outer cylinder, FIG. 3 (b) is a bottom view of the outer cylinder, FIG. 4 is a front view in which the socket and the female body are press-fitted and fixed, and FIG. 5 is a state before the male plug is inserted into the female body. FIG. 6 is a cross-sectional view showing a state in which a male plug is being inserted into a female body, FIG. 7 is a cross-sectional view showing a state in which a male plug has been completely inserted into a female body, and FIG. It is sectional drawing of the state which removes a plug.

1 and 2, a concave groove B having a lead is provided on the inner surface of the outer cylinder 17, and a convex portion C slidable with the concave groove B of the outer cylinder 17 is provided on the outer surface of the socket 5. I have.
Therefore, the outer cylinder 17 cannot be pushed toward the female body 1. This is because the convex portion C of the socket 5 comes into contact with the concave groove B having the lead of the outer cylinder 17. It is possible to push down the outer cylinder 17 by rotating and pushing along the lead of the concave groove B. When the user releases his hand from the pressed state, the outer cylinder 17 returns to the state shown in FIG. 1 by the bias of the spring member 11 formed of a coil spring.

In FIG. 3, the concave groove B having the lead of the outer cylinder 17 and the convex portion C of the socket 5 have a shape capable of rotating and sliding, but the number and shape are not particularly limited. In the case of the present embodiment, two concave grooves B are provided. When the stroke of the outer cylinder 17 moving toward the female body 1 is the same at the lead angle θ of the concave groove B, the larger the lead angle θ, the smaller the rotation angle of turning the outer cylinder 17, and the smaller the lead angle θ, the outer cylinder The angle of turning 17 increases. However, the lead angle θ is an angle at which the outer cylinder 17 can be automatically returned to the original state by the urging of the spring material 11 after pressing the outer cylinder 17.

The socket 5 is externally fixed to the female body 1 and fixed thereto. In the illustrated example, a peripheral groove 6 of the socket 5 is formed corresponding to the projection 2 of the female body 1 and both are formed. It is fitted and fixed. When the outer cylinder 17 is rotated and slid, the socket 5 is provided with a rotation preventing projection D so that the socket 5 does not rotate with the outer cylinder 17, and the female body 1 has a groove that can be fitted therein. When extrapolating and fixing the female body 5 to the female body 1, it is necessary to align and fit the positions. However, there are various means for fixing the female body 1 and the socket 5 and preventing rotation, and the means is not particularly limited.

Similarly, the outer cylinder 17 is externally inserted into the socket 5 and inserted. In the illustrated example, a projection 16 on the inner surface of the outer cylinder 17 is formed corresponding to the projection 7 on the outer surface of the socket 5. Are fitted and inserted. When the outer cylinder 17 is inserted into the socket 5, the projection C
In contrast, it is necessary to fit the outer cylinder 17 in accordance with the position of the entrance of the groove B having the lead. This is because if the convex portion C of the socket 5 is fitted at a position other than the concave groove portion B having the lead of the outer cylinder 17, the convex portion C of the socket 5 becomes
This is because they cannot be fitted by abutting against the end faces.

Next, the operation of inserting and fixing the male plug 18 into the female body 1 and removing it from the female body 1 will be described. As shown in FIG. 5, a projection 2 for fixing the socket 5 is formed on the outer surface of the female body 1 forming the base of the pipe joint, and two circumferential grooves 3, 3 are formed on the inner surface. Is fitted. A spring material 11 is provided on the outer surface of the socket 5.
And a tapered hole 10 for loosely holding the lock member 13, and the end face 9 is in contact with the sleeve 12. And the sleeve 12 is made of the spring material 1
1 and is urged to be separated from the end face 9. Further, the sleeve 12 includes the outer cylinder 17 and the lock member 1.
3, the female body 1, the socket 5, the spring member 11, and the sleeve 12 are arranged in series.

A plurality of hemispherical knobs A are provided on the outer surface of the outer cylinder 17 to facilitate the sliding of the outer cylinder 17 when the male plug 18 is detached. A moving space 14 for the lock member 13 when inserting the male plug 18 and a moving space 15 for the lock member 13 when releasing the male plug 18 are formed on the inner surface.

The male plug 18 to be inserted into the female body 1 has a front tapered portion 20, a large diameter portion 21, a rear tapered portion 22, and an annular groove 23 formed at predetermined positions from a front end 19.
When the male plug 18 is completely inserted into the socket 5, the lock member 13 falls into the annular groove 23.
At this time, the distance between the distal end 19 of the male plug 18 and the front tapered portion 20 is a distance at which the sealing members 4, 4 fitted in the peripheral grooves 3, 3 of the female body 1 can maintain the contact state. ing. Further, the front tapered portion 20 is
When the lock member 13 contacts the lock member 13, the sleeve 12 can be pushed to the joint deep portion side together with the lock member 13, and when the lock member 13 reaches the movement space 14 of the outer cylinder 17, the lock member 13 rides on the large diameter portion 21. Angle.
Further, the rear tapered portion 22 has such an angle that the lock member 13 can ride on the large diameter portion 21 when the male plug 18 is pulled out for removal.

Next, the connection and disconnection between the pipe joint and the male plug 18 will be described in more detail with reference to FIGS. 6, 7 and 8. In this example, when the male plug 18 is inserted into the socket 5 of the pipe joint in the state of FIG. 5, the distal end 19 is inserted without contacting the lock member 13, and the sealing member 4,
4 and is further inserted inside. In this insertion process, as shown in FIG. 6, the front taper portion 20 of the male plug 18 comes into contact with the lock member 13 and pushes the lock member 13 and the sleeve 12 against the bias of the spring material 11 toward the joint deep portion side. Act on. Subsequently, when the lock member 13 reaches the moving space 14 of the outer cylinder 17, the lock member 13 gets over the large diameter portion 21 of the male plug 18 and falls into the annular groove 23. Then, the sleeve 1 is biased by the spring material 11.
2 is pushed back, and at the same time, the sleeve 12 comes into contact with the inner surface of the outer cylinder 17 and emits a contact sound. Therefore,
As shown in FIG. 7, when the male plug 18 is completely inserted, the locking member 13 and the annular groove 23 are fitted to each other, and the male plug 1
8 can be found to be inserted reliably.

However, during the insertion as shown in FIG. 6, the lock member 13 does not fit into the annular groove 23, so that the contact noise between the sleeve 12 and the outer cylinder 17 does not occur. Since the male plug 18 has no binding force, the male plug 18 comes off with a small force, and it can be easily determined whether or not the male plug 18 is completely connected.

In the state shown in FIG. 7 in which the outer tube 17 is completely connected, the concave groove B having the lead of the outer tube 17 and the convex portion C on the outer surface of the socket 5 are in contact with each other, so that the outer tube 17 is pushed toward the female body 1. You cannot do that. Therefore, even if a force for pushing the outer cylinder 17 is inadvertently applied, the outer cylinder 17 cannot be actually pushed, and the detachment of the male plug 17 can be prevented.

Now, as shown in FIG. 7, when the male plug 17 is fully inserted and a force is applied to pull out the male plug 17 or when a fluid flows through the male plug 17, When a force acts in the direction of pulling out the male plug 17, the lock member 13 is pressed and restrained by the inner surface projection 16 of the outer cylinder 17 and the tapered hole 10 of the socket 5, so that the lock member 13 cannot jump out of the annular groove 23. ,
Withdrawal of the male plug 18 from the pipe joint is prevented.

On the other hand, when the male plug 18 is to be detached from the pipe joint, the male plug 18 may be moved toward the female body 1 while holding the knob A and rotating the outer cylinder 17 as shown in FIG. Then, when the male plug 18 is pulled, the lock member 13 is moved by the rear tapered portion 22 of the male plug 18 to the moving space 1 of the outer cylinder 17.
Go to 5. Therefore, the locking member 13 is
Over the large diameter portion 21 and the connection state is released,
The male plug 18 can be easily pulled out from the female body 1.

[0021]

According to the present invention, the following effects are exhibited by the above configuration. By providing a concave groove having a lead on the inner surface of the outer cylinder and a convex portion on the outer surface of the socket, on which the outer cylinder can slide and slide, it is possible to prevent the male plug from being accidentally detached. Further, the female body, the socket, the spring material, and the sleeve are arranged in series in this order, and a space for moving the lock member is provided in the outer cylinder when the spring material contracts and the male plug is removed, and the sleeve contacts the inner surface of the outer cylinder. By making it possible, the male plug can be easily connected and detached, and it can be confirmed that the male plug has been completely connected.

[Brief description of the drawings]

FIG. 1 is a half sectional view showing a state before a pipe is joined in a pipe joint of the present invention.

FIG. 2 is a half sectional view showing a state after detachment of a pipe body in the pipe joint of the present invention.

FIG. 3 is a sectional view and a bottom view of the outer cylinder.

FIG. 4 is a front view showing a state where the socket and the female body are fitted.

FIG. 5 is a half sectional view showing a state before a pipe is inserted into a male body in the pipe joint of the present invention.

FIG. 6 is a half sectional view showing a state in which a pipe is being inserted into a male body in the pipe joint of the present invention.

FIG. 7 is a half sectional view showing a state where the pipe has been inserted into the male body in the pipe joint of the present invention.

FIG. 8 is a half sectional view showing a state in which the pipe is detached from the male body in the pipe joint of the present invention.

FIG. 9 is a sectional view showing a conventional pipe joint.

[Explanation of symbols]

 A: Knob B: Groove C: Convex D: Non-rotating protrusion 1. Female body 2. Protrusion 3. Peripheral groove 4. Seal material (O-ring) 5. Socket 6.・ ・ Circumferential groove 7 ・ ・ Protrusion 8 ・ ・ Step 9 ・ ・ End face 10 ・ ・ Tapered hole 11 ・ ・ Spring material (coil spring) 12 ・ ・ Sleeve 13 ・ ・ Lock member (hard ball) 14. ・ ・ Movement space 15 ・・ Movement space 16 ・ ・ Projection 17 ・ ・ Outer cylinder 18 ・ ・ Male plug 19 ・ ・ Tip 20 ・ ・ Front taper part 21 ・ ・ Large diameter part 22 ・ ・ Rear taper part 23 ・ ・ Circular groove 31 ・ ・ Socket 32 ・ ・・ First sleeve 33 ・ ・ Stopper 34 ・ ・ Second sleeve 35 ・ ・ Lock member 36 ・ ・ Lock piece 37 ・ ・ Spring 38 ・ ・ Plug

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3J106 AB01 BA01 BB01 BC04 BD01 BE21 BE25 CA03 EA03 EB07 EC02 EC07 ED32 EE13 EF05 EF07 EF08

Claims (2)

[Claims] 1. A pipe joint in which a pipe body can be detached by moving an outer cylinder to a pipe joint side, wherein a concave groove having a lead is provided on an inner surface of the outer cylinder, and the outer cylinder is rotatable and slidable on an outer surface of a socket. A pipe joint that can be detached by rotating the outer cylinder along a groove having a lead when detaching the tube by providing a convex part. 2. A female body having a peripheral groove for fitting a seal material on an inner periphery, a socket and a sleeve for supporting a lock member fitted in an annular groove on an outer periphery of a male plug, a spring material for urging the sleeve, and a sleeve. And an outer cylinder that covers the spring material, the female body, the socket, the spring material, and the sleeve are sequentially arranged in series, and the outer cylinder is provided with a moving space for the lock member when the spring material contracts and when the male plug is detached. The pipe joint according to claim 1, wherein the male plug can be connected and disconnected with the pipe.