JP2551454Y2 - 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 from each other.

[0002]

2. Description of the Related Art A pipe joint of this type has already been disclosed in Japanese Patent Application No. Hei 3-58858. In this case, as shown in FIG. 11, the female member A is composed of a main body 1 and a deformable annular body 2 connected to the main body 1, and the retaining claws mutually opposing the inner wall of the annular body 2. As shown in the figure, the male member B has an outwardly projecting piece 41 having a diameter slightly larger than the width between the retaining claws 20 at a certain distance from the insertion end. It is provided.
11 and FIG. 12
As shown in the figure, the annular operating body 5 having a greater rigidity is rotatably extrapolated, and the retaining claw of the annular body 2 is attached to the inner peripheral portion of the annular operating body 5 with the rotation of the annular operating body 5. Push the portion between 20, 20 inward to prevent the retaining claws 20, 2
A cam surface 53 is formed so as to separate them from each other, and the maximum distance between the retaining claws 20, 20 due to the rotation of the annular operating body 5 is set to be larger than the diameter of the outwardly protruding piece 41 described above. As shown in FIG. 11, the retaining claw 20 has a riding surface 21 that is inclined so as to expand toward the end and a locking surface 22 that is located deeper than the riding surface 21.

In the pipe joint of this embodiment, when connecting or disconnecting the male member B and the female member A, the annular operating body 5 may be rotated.
The distance between 0 and 20 becomes larger than the diameter of the outwardly protruding piece 41 of the male member B from the state shown in FIG. 12 to the state shown in FIG. Therefore, the retaining claw 20 and the outwardly protruding piece 41 are not locked, and the female member A and the male member B can be easily connected and separated.

[0004] That is, in this pipe joint, connection and disconnection can be easily performed by a simple rotation operation of the annular operating body 5, and it is very convenient to use. However, in the above-mentioned pipe joint, when the male joint B is separated from the female joint A, the state in which the distance between the retaining claws 20, 20 in the annular body 2 is larger than the diameter of the outwardly projecting piece 41 is maintained. Therefore, in order to bring these components into a connected state again, after inserting the male joint B into the female joint A to an appropriate position, the annular operating body 5 must be rotated. If the rotation operation of the annular operating body 5 performed after the insertion of the male joint B into the female joint A is forgotten, the male joint B jumps out of the female joint A due to the fluid pressure. A large amount of water will flow out of the system.

[0005]

Therefore, according to the present invention, with respect to the pipe joints described in the section of the prior art, the female joint and the male joint are separated, and when these are connected again, the rotation of the annular operating body is performed. It is an object to provide a pipe joint that requires no operation.

[0006]

In the present invention, a female member is composed of a cylindrical main body and an annular body connected to the main body and having an elastically deformable stopper protruding from an inner wall thereof. An annular operating body rotatably inserted into the annular body and having a greater rigidity than the annular body, and a male member connected to the female member in a state of being inserted into the annular body, Is provided with an outwardly projecting portion having a diameter slightly larger than the width between the retaining claws of the annular body in the natural state, and an inner peripheral portion of the annular operating body is provided along with the rotation operation of the annular operating body. To form a cam surface that pushes inward the interlocking claw portions of the annular body to separate the locking claws from each other, and by the separating operation of the locking claws between each other with the rotation operation of the annular operating body,
In a pipe joint in which the engagement of the retaining claw with the outwardly projecting portion is released so that the male member can be pulled out from the female member, the annular operating body is made thick and the axial direction of the female member is increased. The cam surface of the annular operating body is disengaged from the outer peripheral surface of the annular body when the annular operating body is at the forward position, and the outer peripheral surface of the annular body when the annular operating body is at the retracted position. On the other hand, the front end of the annular operating body is provided with opposing elastic engaging pieces, and the distance between the elastic engaging pieces is slightly smaller than the outwardly projecting portion of the male member. When the male member is pulled out from the female member, the annular operating body is moved from the retracted position to the advanced position by the engagement of the elastic engagement piece and the outwardly projecting portion, and when the male member reaches the advanced position, the annular operating body is moved outward. The protruding part is a small piece of elastic engagement The elastic engagement pieces are adapted to be deformed to a can pass.

[0007]

The present invention has the following functions. When the pipe joint is set to the separated state, the steps are performed in the following order. That is, first, the annular operating body at the retracted position is operated to rotate in a predetermined manner. In this state, the portion between the locking claws of the annular body is pushed inward by the cam surface provided on the inner periphery of the annular operating body, and the engagement of the locking claw with the outward projection is released. For this purpose, the locking claws are separated from each other. Next, the male member is pulled against the female member in the above state. Then, the outwardly projecting portion of the male member passes through the locking claw portion of the annular operating body, and is engaged with the elastic engaging piece provided at the front portion of the annular operating body. The male member is further pulled from the above state with respect to the female member. Then, the annular operating body is moved to the forward position integrally with the outwardly protruding portion, and the cam mechanism-like pair between the cam surface and the annular body is released. In this state, the annular body is in a natural state, and the distance between the locking claws is smaller than the diameter of the outwardly projecting portion of the male member. Subsequently, the male member is further pulled with respect to the female member from the above state, that is, from the advanced position of the annular operating body. Then, since the annular operating body 5 does not move any more, the elastic engaging piece that has been engaged with the outwardly projecting piece is elastically deformed, and the engagement between the outwardly projecting piece and the elastic engaging small piece is released. Thus, the male member can be separated from the female member.

Then, when the female joint and the male joint are separated as described above (in this state, the annular body is in a natural state), and when these are again connected to each other, in this pipe joint, the male member is connected to the female member. Forcibly by inserting it into the annular body.
Then, the outer protruding portion deforms the annular body so as to push out the retaining claws, and when the outer protruding portion passes through the retaining claws, the annular body returns elastically, and the retaining claws move to the outer protruding portions. On the other hand, it returns to the natural state that is the retaining position.

That is, in this pipe joint, the female joint and the male joint are separated from each other with respect to the pipe joint described in the section of the prior art, and the annular operating body is not rotated again when these parts are connected to each other. The connection state can be secured.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the configuration of the present invention. In this embodiment, as shown in FIG. 1, a male member B constituted by a pipe P is directly inserted and connected to a female member A. The outwardly projecting piece 41 is located at the distance.
(Corresponding to the outward protrusion in the column of means).

The above-mentioned female member A is made of an elastic synthetic resin. As shown in FIG. 1 and FIG. 3, the main body 1 having a pipe connection portion 10 at one end and the male member B of the main body 1 are connected to each other. An annular body 2 provided on the connection end side, a pair of connecting pieces 3 for connecting the annular body 2 and the main body 1 at an interval of 180 °, It has an annular operating body 5 inserted and a seal retainer 6. The main body 1 has a small-diameter hole 1 slightly larger than the diameter of the pipe P, as shown in FIGS.
8 and a large-diameter hole 19 opened to the connection end side, and as shown in FIGS. 1 and 2, the connection piece 3 is formed on the outer peripheral surface of the large-diameter hole 19 at the open end side. A projecting piece 17 projecting at right angles is formed.

As shown in FIG. 2, the annular body 2 is formed by making a thin plate into an elliptical shape (the portion connected to the connecting piece 3 is on the short diameter side). A locking claw 20 having a constant width and having a riding surface 21 inclined to increase the diameter toward the front surface and a locking surface 22 located on one side of the connection is provided. As shown in FIGS. 2 and 3, the connection piece 3 has a thin plate shape, and has a groove 31 provided in an inner surface portion near the main body 1.

As shown in FIGS. 1 and 5, the annular operating body 5 has a circular shape having a circular hole 50 slightly larger than the major axis of the annular body 2. As shown in FIGS. To
A cam surface 53 is provided at a front portion of the inner peripheral surface of the circular hole 50 at an interval of 180 °, and a distance between the cam surfaces 53 is substantially equal to a minor diameter of the annular body 2. Also, FIG.
As shown in the figure, a pair of locking rods 54 are formed to penetrate and project from the outer peripheral surface toward the inner peripheral surface of the annular operating body 5 (instead of the locking rods 54, the inner peripheral surface of the annular operating body 5). A protrusion may be provided on the annular operating body 5 by engaging the inner end of the locking rod 54 with the annular body 2. (See the solid line in FIG. 5). On the other hand, as shown in FIGS. 1 and 3, inwardly extending portions 56, 56 are provided at the front of the annular operating body 5, and the inwardly extending portion 56 is provided. , 56 and the ring 2
The retracted position of the annular operating body 5 is determined by the engagement with (see FIG. 3). That is, the range of movement of the annular operating body 5 is regulated by the relationship between the locking rod 54 and the inwardly extending portion 56 and the annular body 2.

Further, the front end of the annular operating body 5 is
As shown in FIG.
And the distance between the elastic engaging pieces 55, 55 is set slightly smaller than the outwardly protruding piece 41 of the male member B, and when the male member B is pulled out from the female member A, the annular operating body 5 The engagement between the elastic engaging piece 55 and the outwardly projecting piece 41 moves the retracted position from the retracted position to the advanced position. When the advanced position is reached, the outwardly projecting piece 41 can pass through the position where the elastic engaging small piece 55 is provided. The elastic engagement piece 5
5, 55 can be deformed. As shown in FIGS. 1 and 2, the rear end of the annular operating body 5 has an inwardly projecting claw 5 positioned at a right angle to the cam surface 53.
7 and 57 (a so-called one-way clutch which gets over the projecting pieces 17 and 17 only when the annular operating body 5 is pushed from the forward position to the retracted position). The inwardly projecting claws 57, 57 and the projecting pieces 17,
Engagement / disengagement with 17 can be realized.

The annular operating body 5 has a higher rigidity than the above-mentioned annular body 2. As a method, there is a method of using a member having a large rigidity for increasing the plate thickness. As shown in FIGS. 2 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 slightly smaller than the large-diameter hole 19 of the main body 1. It has a set cylindrical shape, and has a flange portion 60 on the outer peripheral surface on one end side. Then, in the assembled state of the female member A, the two O-rings 70, 70 and the collar 71 having a rectangular cross section are accommodated in the large-diameter hole 19 of the main body 1, and these are held inward by the seal retainer 6. Pressed toward. The seal holder 6 is
As shown in FIG. 3, the flange 60 is fitted into the groove 31 of the connection piece 3 so as not to be inadvertently detached from the main body 1.

Since this pipe joint is constructed as described above, the pipe joints are separated in the following order. That is, first, the annular operating body 5 in the retracted position is rotated from the state of FIG. 4 to the state of the two-dot chain line in FIG. 5 (see FIGS. 6 and 7). In this state, the cam surface 53 provided on the inner periphery of the annular operating body 5 causes the two-dot chain line in FIG.
As shown in the figure, the portion between the locking claws 20 in the annular body 2 is pushed inward, and the outwardly protruding piece 41 of the locking claw 20 is formed.
The locking claws 20, 20 are separated from each other so that the engagement with the locking claw 20 is released. In this state, the inwardly projecting claw 5
The relationship between 7 and 57 and the protruding piece 17 changes from the state of FIG. 8 to the state of FIG. 9, and the mutual engagement is released. Next, the male member B is pulled against the female member A from the above state. Then, the outwardly protruding portion 41 of the male member B passes through the locking claws 20, 20 of the annular operating body 5, and as shown by the solid line in FIG.
55 and an engaged state. The male member B is further pulled with respect to the female member A from the above state. Then, the annular operating body 5 is moved integrally with the outwardly protruding piece 41 from the retracted position (the position indicated by the two-dot chain line in FIG. 5) to the advanced position (the solid line position in FIG. 5). The pairing with the cam mechanism 2 is released.
In this state, the annular body 2 is in a natural state, and the distance between the locking claws 20 is smaller than the diameter of the outwardly protruding piece 41 of the male member B. Subsequently, the male member B is further pulled from the above state with respect to the female member A. Then, the elastic engaging pieces 55, 55 that have been engaged with the outward projecting piece 41 are elastically deformed as shown by the two-dot chain line in FIG. , 55 disengaged and male member B
Can be separated from the female member A.

In this pipe joint, the female joint A and the male joint B are separated as described above (in this separated state, the annular body 2 is in a natural state). Then, the male member B is forcibly pushed in a manner of being inserted into the annular body 2 of the female member A. Then, the outwardly projecting piece 41 deforms the annular body 2 so as to push the locking claws 20, 20 apart, and when the outwardly projecting piece 41 passes through the retaining claws 20, 20, the annular body 2 becomes elastic. Return to the above stopper nails 20 and 2
0 returns to the retaining position with respect to the outwardly protruding piece 41. That is, the male member B is in a retaining state with respect to the female member A.

As described above, in this pipe joint, the female joint A and the male joint B can be separated, and when they are connected to each other again, the connection state can be secured without rotating the annular operating body 5. Becomes Note that, as described above, the female joint A and the male joint B
After that, the annular operating body 5 is pushed to the retracted position with the cam surface 53 thereof and the short-diameter portion of the annular body 2 facing each other, and is pushed through the projecting piece 17 and the inwardly projecting claw 57. When the annular operating body 5 and the main body 1 are brought into a connected state by means of the above, elastic deformation of the annular body 2 (the locking claws 20, 2) can be achieved.
(Separation between 0) is stabilized, and as a result, the connecting force between the female joint A and the male joint B becomes strong.

In this embodiment, the pipe P is inserted and connected directly to the female member B. However, the present invention is not limited to this, and the pipe P may be connected to a normal male member as described in the section of the prior art. The member B may be used.

[0020]

Since the present invention has the above-described configuration, it has the following effects. In this fitting,
As described in the above-described section of the operation, regarding the pipe joint described in the section of the conventional art, the female joint and the male joint are separated, and again, when these are connected to each other, the rotational operation of the annular operating body is not required. The connection state can be secured.

That is, with respect to the pipe joints described in the section of the prior art, it is possible to provide a pipe joint which separates the female joint and the male joint, and does not require the rotating operation of the annular operating body when these are connected again. Was.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a female member and a male member of a pipe joint according to this embodiment.

FIG. 2 is an exploded perspective view of the pipe joint.

FIG. 3 is a half sectional view of the pipe joint in a connected state.

FIG. 4 is a half sectional view of a surface of the pipe joint in a direction perpendicular to the section in FIG. 3;

FIG. 5 is a view showing the movement of an annular operating body in the pipe joint.

FIG. 6 is a sectional view taken along line AA of FIG. 3;

FIG. 7 is a view showing a state when the annular operating body is rotated by 90 ° from the state shown in FIG. 6;

FIG. 8 is a sectional view taken along line BB of FIG. 4;

FIG. 9 is a view showing a state when the annular operating body is rotated by 90 ° from the state shown in FIG. 8;

FIG. 10 is a view showing a relationship between an elastic engagement piece of an annular operating body and an outwardly projecting piece of a male member in the pipe joint.

FIG. 11 is an exploded perspective view of a prior art pipe joint.

FIG. 12 is a view showing a state before the operation of the annular operating body in the pipe joint.

FIG. 13 is a view showing a state after the operation of the annular operating body in the pipe joint.

[Explanation of symbols]

 Reference Signs List A female member B male member 1 main body 2 annular body 3 connecting piece 41 outwardly protruding piece 53 cam surface 55 elastic engaging small piece

Claims (4)

(57) [Scope of request for utility model registration] 1. A female member comprising: a cylindrical main body; an annular body connected to the main body and having an elastically deformable retaining claw protruding from an inner wall of the female body; An annular operation body that is extrapolated and has a greater rigidity than the annular body is provided. On the other hand, a male member connected to the female member in a state of being inserted into the annular body is provided with a cylindrical main body and an annular shape in a natural state. An outer protruding portion having a diameter slightly larger than the width between the retaining pawls of the body is provided, and between the retaining pawls in the annular body, the inner peripheral portion of the annular operating body is provided along with the rotation operation of the annular operating body. Forming a cam surface that pushes the part inward and separates the retaining claws from each other, and the engagement of the retaining claws with the outwardly projecting portions is released by the separating operation of the retaining claws with each other due to the rotation operation of the annular operating body. In a fitting that allows the male member to be withdrawn from the female member, The working body is made thicker and can advance and retreat only in a certain range in the axial direction of the female member, and the cam surface of the annular operating body separates from the outer peripheral surface of the annular body when the annular operating body is at the advanced position. When the annular operating body is in the retracted position, the annular operating body faces the outer peripheral surface of the annular body. The distance between the small pieces is set to be slightly smaller than the outwardly protruding portion of the male member, and when the male member is pulled out from the female member, the annular operating body is retracted by the engagement between the elastic engagement small piece and the outwardly protruding portion. From the first position to the forward position, and when reaching the forward position, the elastic engaging piece is deformed so that the outwardly protruding portion can pass through the elastic engaging small position. 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 the main body and the annular body are connected by a pair of pieces, and the piece mutual pipe 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 °.