JP2592358B2 - Pipe fittings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint comprising a female member and a male member, which can be connected and separated.

[0002]

2. Description of the Related Art As detachable pipe joints, for example,
There is one disclosed in Japanese Utility Model Laid-Open No. 2-159493, which is composed of a female member A and a male member B made of an elastic synthetic resin as shown in FIGS.

[0003] As shown in FIG.
The main body 1 having a pipe connection portion 10 at one end, an annular body 2 provided on the connection end side of the main body 1 with the male member B and having a larger inner diameter than the main body 1, and the annular body 2 and the main body 1
And a pair of connecting pieces 3 connected at an interval of °.
A retaining claw 20 having a fixed width is provided which has a riding surface inclined to increase the diameter toward the end and a locking surface located on one side of the connection.

On the other hand, the male member B is composed of a main body 4 having a pipe connection portion 40 at one end as shown in FIG.
An outwardly projecting piece 41 is provided around the outer peripheral surface of the main body 4. The outwardly protruding piece 41 is configured to have a riding surface inclined to reduce the diameter toward the insertion end side and a locking surface located on the opposite side of the riding surface.

In the above-mentioned pipe joint, when the male member B is connected to the female member A, the outwardly protruding piece 41 of the male member B causes the annular body 2 to be elastically deformed via the retaining claw 20 so as to be forcibly applied. In the inserted and connected state, the annular body 2 is elastically restored so that the locking surface of the retaining claw 20 and the locking surface of the outwardly projecting piece 41 can be locked. is there.

Therefore, in this pipe joint, the female member A and the male member B can be connected with one touch, and even if a fluid pressure acts, they are not inadvertently separated from each other.

However, this pipe joint has a problem that once connected, it cannot be easily separated.

That is, when the female member A and the male member B are separated from each other in the above-mentioned pipe joint, a jig G having a pair of detachable claws g separate from the pipe joint as shown in FIG. As shown in FIG. 11, the annular members 2 are elastically deformed by separating the claws g, g from each other, thereby causing the locking surfaces of the retaining claws 20 and the outwardly protruding pieces 41 to be separated from each other. This is because the locking with the locking surface must be completely released.

[0009]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a pipe joint of the type described above, in which both the female member and the male member can be easily connected and separated from each other.

[0010]

According to the present invention, the female member is composed of a main body and a deformable annular body connected to the main body. On the other hand, an outer protrusion having a diameter slightly larger than the width between the retaining claws is provided at a position at a fixed distance from the insertion end of the male member, and the outer protrusion is provided during the insertion connection of the male member to the female member. The annular body is deformed so as to push out the retaining claws, and when the outwardly projecting part passes through the retaining nail, the annular body elastically returns to return the retaining nail to the retaining position with respect to the outwardly projecting part. In the type of pipe joint, an annular operating body having a greater rigidity is externally rotatably extrapolated to the annular body of the female member, and an inner peripheral portion of the annular operating body is annularly rotated with the rotation of the annular operating body. Push the part between the retaining claws on the body inward to Forming a cam surface for separating, with set larger than the diameter of outward protrusion that the maximum distance between the retaining claws each other according to the rotation of the annular operating body,
The annular operating body is provided so as to be movable in the axial direction with respect to the annular body, and after the connection is completed, the annular operating body can be pushed to a position where the annular operating body comes off the annular body.

[0011]

The present invention has the following functions.

In the pipe joint of the present invention, as in the description of the prior art, it is only necessary to forcibly insert the male member into the female member, and when these members are connected to each other, the annular member is elastically restored. In this state, the distance between the retaining claws is smaller than the diameter of the outwardly protruding portion of the male member. Therefore,
In this state, the female member and the male member are not inadvertently separated even if a fluid pressure acts on the inside of the pipe.

Conversely, when the female member and the male member of the pipe joint of the present invention are separated from each other, it is preferable to rotate the annular operating body. The cam surface pushes the portion between the retaining claws of the annular body inward to separate the retaining claws from each other. When the distance between the retaining claws becomes larger than the diameter of the outwardly protruding portion of the male member with the rotation of the annular operating body, the retaining claws and the outwardly protruding portion are not locked, so that the female The member and the male member can be easily separated.

That is, in the pipe joint of the present invention, connection can be made only by forcibly inserting the male joint into the female joint, and separation can be made only by rotating the annular operating body.

Further, if the annular operating body is pushed to the position where it comes off from the annular body after the connection is completed, the female member and the male member remain inseparable even if the annular operating body is rotated by mistake. It will be.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

In this embodiment, as shown in FIGS. 1 to 3, a male member B constituted by a pipe P is directly inserted and connected to a female member A. An outwardly projecting piece 41 (corresponding to the outwardly projecting portion in the column of means) is formed on the outer peripheral surface at a position at a fixed distance from the tip.

The above-mentioned female member A is made of an elastic synthetic resin, and as shown in FIG.
0, an annular body 2 provided on the connection end side of the male member B of the main body 1 and a pair of connecting pieces 3 for connecting the annular body 2 and the main body 1 at 180 ° intervals, An annular operating body 5 rotatably mounted on the annular body 2 and a seal retainer 6 are provided.

As shown in FIGS. 1 and 2, the main body 1 has a small-diameter hole 18 slightly larger than the diameter of the pipe P.
And a large-diameter hole 19 opening to the connection end side.

As shown in FIG. 2 and FIG.
A riding surface 21 which is formed by making a thin plate into a circular shape and which is inclined in such a manner as to increase in diameter toward an end portion in the vicinity of the connection piece 3 described above.
A locking claw 20 having a fixed width and a locking surface 22 located on one side of the connection.
Projections 29 are formed in the middle of each other.

As shown in FIG. 4, the connection piece 3 has a thin plate shape, and has a projection 30 on the outer surface and a groove 31 on the inner surface near the main body 1.

As shown in FIGS. 2 and 4, the annular operating body 5 has a large-diameter hole 50 slightly larger than the distance between the protruding portions 29, 29 of the annular body 2, a larger diameter than the diameter of the annular body 2, and A circular hole having a small-diameter hole 51 smaller than the distance between the tips of the protruding portions 29, 29 is provided.
Are provided with cam surfaces 53 at 180 ° intervals on the inner peripheral surface thereof, and the distance between the cam surfaces 53 is substantially equal to the diameter of the annular body 2. Although the annular operating body 5 has a higher rigidity than the above-described annular body 2, there is a method of using a rigid member for increasing the plate thickness.

As shown in FIGS. 1 and 4, the seal retainer 6 has an inner diameter set slightly larger than the outer diameter of the pipe P and an outer diameter larger than the large diameter hole 19 of the main body 1 described above. It has a cylindrical shape that is set slightly smaller, and has a flange portion 60 on the outer peripheral surface on one end side.

The annular member 2 of the above-described annular operating member 5
In the state of being attached to the annular operation body 5, the annular operation body 5 is located within a region sandwiched between the projection 30 of the connection piece 3 and the projection 29 of the annular body 2.
It is configured to be movable in the axial direction , so that the annular operating body 5 rotates and rotates with respect to the annular body 2 in the axial direction.
It is made possible to move in the direction .

In the assembled state of the female member A, two O-rings 70, 70 and a collar 71 having a rectangular cross section are accommodated in the large-diameter hole 19 of the main body 1 described above, and these O-rings 70 are held by the seal retainer 6. Is pressed inward. The seal retainer 6 has its flange portion 60 fitted into the groove 31 of the connection piece 3 so as not to be inadvertently detached from the main body 1.

Since the pipe joint of this embodiment is constructed as described above, similar to that described in the section of the prior art,
The connection can be made simply by forcibly inserting the pipe P into the female member A.

When the annular operating body 5 is rotated in the above-mentioned connected state, when the annular operating body 5 rotates,
As shown in the figure, the cam surface 53 of the annular operating body 5 pushes the protruding portion 29 of the annular body 2 inward to prevent the locking claws 20, 20.
When they are separated from each other. With the rotation of the annular operating body 5, as shown in FIG.
0 is larger than the diameter of the outwardly protruding piece 41 of the pipe P, and when the pipe P is pulled in this state, the pipe P
And the female member B can be easily separated.

In this embodiment, the pipe P is directly inserted and connected to the female member B. However, the present invention is not limited to this. May be used as the male member B.

In this embodiment, the circular annular operating member 5 having the cam surface 53 on the inner peripheral portion is employed. However, the present invention is not limited to this. As shown in FIGS. ,
The large-diameter hole 50 of the annular operating body 5 may be formed in an elliptical shape.
In this case, the short diameter portion of the large-diameter hole 50 formed in an elliptical shape and the constituent wall near the short diameter portion (the inner peripheral surface of the annular operating body 5) function as the cam surface 53.

Further, in this embodiment, the annular operating body 5 is sandwiched between the projection 30 of the connecting piece and the projection 29 of the annular body 2.
So that it can move in the axial direction within the enclosed area.
It is. In other words, the annular operation body 5 is
It is possible to rotate and advance and retreat in the axial direction, and if the annular operating body 5 is pushed to a position where it comes off from the annular body 2 after the connection is completed, the female member A and The pipe P is maintained in an inseparable state.

On the other hand, in the embodiment described above, the entire female member A is made of an elastic synthetic resin. However, the present invention is not limited to this.
And only the annular body 2 may be made of an elastic material.

[0032]

Since the present invention has the above-described configuration, it has the following effects.

In the pipe joint according to the present invention, the connection can be made only by forcibly inserting the female joint into the female joint, and conversely, it can be separated only by rotating the annular operating body. That is, it was possible to provide a pipe joint in which the female member and the male member can be easily attached to and detached from each other.

Further, if the annular operating member is pushed to a position disengaged from the annular member after the connection is completed, the female member and the male member are kept inseparable state even if the annular operating member is rotated by mistake. It will be.

[Brief description of the drawings]

FIG. 1 is a half sectional view of a pipe joint of this embodiment in a connected state.

FIG. 2 is a side view of the pipe joint.

FIG. 3 is a half sectional view of a surface of the pipe joint in a direction perpendicular to the section in FIG. 1;

FIG. 4 is an exploded perspective view of the pipe joint.

FIG. 5 is a view when an annular operating body in the pipe joint is operated.

FIG. 6 is an external view of an annular operating body in a pipe joint according to another embodiment.

FIG. 7 is a view when an annular operating body of a pipe joint according to another embodiment is operated.

FIG. 8 is a perspective view of a conventional pipe joint.

FIG. 9 is a cross-sectional perspective view of a connection state of a conventional pipe joint.

FIG. 10 is a view showing a state in which claws of a jig are inserted into a pipe joint.

FIG. 11 is a view showing a state in which claws of a jig are separated from each other.

[Explanation of symbols]

 A female member B male member 1 main body 2 annular body 3 connecting piece 20 retaining claw 41 outward protruding piece 53 cam surface

Claims (4)

(57) [Claims] 1. A female member comprising a main body and a deformable annular body connected to the main body, and retaining stopper claws projecting from each other on the inner wall of the annular body. An outwardly projecting portion having a diameter slightly larger than the width between the retaining claws is provided at a position at a fixed distance from the outer peripheral portion. A female member, wherein the annular body is elastically restored when the outwardly projecting portion passes through the retaining claw and the retaining claw returns to the retaining position with respect to the outwardly protruding portion. The annular operating body having a greater rigidity than the annular operating body is rotatably extrapolated to the annular body, and an inner peripheral portion of the annular operating body is provided with a portion between the retaining claws in the annular body along with the rotation of the annular operating body. Form a cam surface that pushes inward to separate the retaining claws from each other, The maximum distance between the retaining claws due to the rotation of the annular operating body is set to be larger than the diameter of the above-mentioned outwardly protruding portion, and the annular operating body is axially aligned with the annular body.
A pipe joint characterized in that it is provided so as to be movable in the direction, and after the connection is completed, the annular operating body can be pushed to a position where the annular operating body comes off the annular body. 2. The pipe joint according to claim 1, wherein at least the annular body of the female member is made of an elastic synthetic resin. 3. The pipe joint according to claim 1, wherein a connection between the main body and the annular body is made by a pair of pieces, and the space between the pieces is opened. 4. A retaining claw provided on the inner wall of the annular body,
The pipe joint according to any one of claims 1 to 3, wherein the pipe joint is located at an interval of °.