JPH08219353A - Quick disconnect joint - Google Patents

Abstract

PURPOSE: To provide a quick disconnect joint simple in structure and easily fitted/removed by one hand. CONSTITUTION: A valve element 50 energized in the seated direction of a valve seat 62 by a spring 48 is mounted in a socket 16, and a protruding part 10 protruding in the radial direction is formed at a plug 1. An engaging groove 68 into which the protruding part 10 is inserted at the connecting time is formed at the socket 16. The engaging groove 68 is provided with a lead-in part into which the protruding part 10 is inserted by the insertion of the plug 1 into the socket 16, a horizontal part along which the protruding part 10 is slided by relative rotation, and a locking part into which the protruding part 10 enters by the energizing force of the spring 48 so as to regulate detachment. At the non-connecting time, the valve element 50 is seated on the valve seat 62 to cut off a passage, and at the connecting time, the valve element 50 is pushed against the energizing force of the spring 48 by the end part of the plug 1 and separated from the valve seat 62 to communicate the passage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quick coupling which can be quickly connected and disconnected.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Publication No. 45-11753 and Japanese Utility Model Publication No. 3-9563, various types of quick couplings capable of quick connection and disconnection are known. .

In such a quick joint, as shown in FIG. 6, a ring-shaped groove 104 is provided on the outer periphery of the insertion shaft portion 102 of the plug 100. The cylindrical portion 108 of the socket 106 into which the insertion shaft portion 102 is inserted is provided with a plurality of through holes 110 on the circumference, and the steel balls 112 are inserted into the through holes 110.

An operating sleeve 114 is provided on the outer periphery of the cylindrical portion 108.
Is slidably fitted, and a tapered portion 116 is formed on the inner circumference of the operation sleeve 114 so as to correspond to the steel ball 112. The operating sleeve 114 is biased by a spring 118 so that the tapered portion 116 contacts the steel ball 112.

When the plug 100 and the socket 106 are connected, first, as shown in FIG. 6A, the insertion shaft portion 102 is inserted into the cylindrical portion 108. As a result, the end of the valve opening shaft 120 of the socket 106 contacts the valve body 122 of the plug 100, and as shown in FIG.
2 is pushed against the biasing force of the spring 124 to separate it from the valve seat 126.

On the other hand, when the insertion shaft portion 102 is inserted into the cylindrical portion 108, the steel ball 112 is fitted in the groove 104, and the operating sleeve 114 is slid by the urging force of the spring 118 to cover the steel ball 112. As a result, the plug 100 and the socket 106 are connected, and the plug 100 cannot be pulled out.

At the time of removal, the operator slides the operating sleeve 114 with his left hand against the urging force of the spring 118, and when the tapered portion 116 passes through the steel ball 112, the steel ball 112 can move in the radial direction. Become. When the plug 100 is pulled out with the right hand, the steel ball 112 is detached from the groove 104 and the plug 100 can be removed.

[0008]

However, in such a conventional device, the operating sleeve 114, the spring 118,
There is a problem that the steel ball 112 and the like are required, the number of parts is large, the structure is complicated, and the cost is high. Also, both hands for connecting and disconnecting, especially when disconnecting,
There is a problem that both the hand for operating the operation sleeve 114 and the hand for holding the plug 100 are required.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a rapid joint which has a simple structure and can be easily attached and detached with one hand.

[0010]

In order to achieve such an object, the present invention has the following constitution as means for solving the problem. That is, a plug and a socket to which the plug is axially inserted and connected are provided, and a valve body biased in a seating direction of a valve seat by a spring is internally provided in one of the sockets, and when not connected, the valve body is In the quick coupling, which is seated on the valve seat and blocks the flow passage, and when connected, the valve body is pushed against the biasing force of the spring by the other end and is separated from the valve seat to communicate the flow passage, A protrusion protruding in the radial direction is formed on one of the plug and the socket, and the other end is formed with an engagement groove into which the protrusion is inserted at the time of connection so that the protrusion can slide by relative rotation. The engagement groove is formed so as to be able to regulate the disengagement of the protrusion by the urging force of the spring at the time of connection.

The projection may be formed on the plug and the engagement groove may be formed on the socket. Alternatively, the engagement groove may be formed by inserting the plug into the socket. And a horizontal portion on which the protrusion slides due to relative rotation, and a locking portion that restricts the protrusion from entering and leaving by the biasing force of the spring. Good.

[0012]

In the quick coupling having the above structure, when the plug is inserted into the socket at the time of connection, the end portion contacts the valve body and pushes the valve body against the spring to separate it from the valve seat to connect the flow path. . Further, the projection is inserted into the engagement groove, the projection slides in the engagement groove by relative rotation, and the projection is restricted from being disengaged by the engagement groove by the biasing force of the spring. Also, at the time of removal, the protrusion is disengaged from the engaging groove against the biasing force of the spring,
The protrusion is pulled out from the engaging groove by relatively rotating and sliding in the engaging groove. At this time, the end portion is separated from the valve body, and the valve body is seated on the valve seat by the urging force of the spring to block the flow path.

In the case where the engaging groove has the introduction portion, the horizontal portion, and the locking portion, the projection is inserted into the introduction portion at the time of connection, slides on the horizontal portion by relative rotation, and the spring is attached. Due to the force, the protrusion enters the locking portion and its removal is restricted.

[0014]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIG. 1, 1 is a plug, and plug 1
A flexible hose 4 is inserted into the joint part 2 of FIG. 3, and a tubular metal fitting 6 is inserted into the hose 4 and caulked to prevent the hose 4 from coming off. The tip of the hose 4 is connected to a faucet of water supply, a main tap of gas, and the like.

Further, the plug 1 is provided with an insertion shaft portion 8, and two cylindrical projections 10 protruding in the radial direction are formed on the insertion shaft portion 8 on the same line, and the tip end side of the insertion shaft portion 8 is formed. An O-ring 12 is fitted in the. As shown in FIG. 2, a through hole 14 is formed in the center of the plug 1 in the axial direction to communicate with the inside of the hose 4.

Reference numeral 16 denotes a socket. A flexible hose 20 is inserted into a joint portion 18 of the socket 16. A tubular metal fitting 22 is inserted into the hose 20 and caulked to prevent the hose 20 from coming off. Has been planned. The tip of the hose 20 is connected to a consumer of tap water or a consumer of gas, for example, a washing section with water or a tank.

A male screw portion 24 is provided on the outer periphery of the tip of the socket 16.
And a flange portion 26 are formed, and a pin portion 28 protruding toward the male screw portion 24 side is provided upright on the flange portion 26. The socket 16 has a male screw portion 24 in a large-diameter hole 32 formed in the housing 30,
The pin portion 28 is inserted into the small diameter hole 34 formed in the. A nut 36 is screwed into the male screw portion 24 to fix the socket 16 to the housing 30, and a pin portion 28
Is used to stop the rotation.

The joint portion 18 has a through hole 38 in its axial direction.
The through hole 38 is formed with a communication hole 42 via a step 40, and the communication hole 42 is connected with a storage hole 46 via a step 44. A spring 48 whose one end is in contact with the step portion 40 is inserted into the communication hole 42.
The large diameter portion 52 of the valve body 50 is in contact with the other end of the.

The large-diameter portion 52 of the valve body 50 is formed to have a diameter such that a gap is formed between the large-diameter portion 52 and the communication hole 42. The large-diameter portion 52 has a shaft portion 54 on the storage hole 46 side. It is formed to project toward. A bottomed hole 56 is formed in the shaft portion 54 from the tip end side in the axial direction thereof, and a connection hole 58 is formed in the bottom side of the bottomed hole 56 in the radial direction.

A ring-shaped packing 60 is inserted into the storage hole 46 in contact with the step portion 44, and the shaft portion 54 of the valve body 50 penetrates the packing 60 and projects toward the storage hole 46. There is. A valve seat 62 is formed so that the large diameter portion 52 is seated on the packing 60.

Further, the insertion member 64 is inserted into the accommodation hole 46 so as to abut the packing 60, and the insertion hole 66 into which the insertion shaft portion 8 of the plug 1 can be inserted in the axial direction of the insertion member 64. Are formed. The shaft portion 54 of the valve element 50 is slidably inserted into the insertion hole 66.

Two engaging grooves 68 are formed on the inner surface of the insertion hole 66.
Are symmetrically formed, and both engaging grooves 68 have the same shape. Therefore, one engaging groove 68 will be described with reference to FIG. The engaging groove 68 allows the protrusion 10 to be inserted and allows the insertion member 6 to be inserted.
4 is provided with an introduction portion 68a opening to the upper end surface thereof, and an inclined guide surface 70 with which the projection 10 abuts is formed on the introduction portion 68a. It should be noted that the guide surface 70 is not limited to the case where the guide surface 70 is inclined, and may be a vertical surface.

The horizontal portion 68 is connected to the introduction portion 68a.
b is formed, the projection 10 is formed slidable in the horizontal portion 68b, and the horizontal surface 7 with which the projection 10 abuts is formed.
2 is formed. When the projection 10 contacts the horizontal surface 72, the end of the insertion shaft 8 contacts the shaft 54 of the valve body 50 and pushes the valve body 50 against the urging force of the spring 48, and the large diameter portion 52. Is separated from the valve seat 62, and the lengths of the insertion shaft portion 8 and the shaft portion 54 are determined so that the connection hole 58 communicates with the communication hole 42.

The locking portion 68c is connected to the horizontal portion 68b.
Is formed, the projection 10 is formed slidable in the locking portion 68c, and the locking portion 68c moves the projection 10 by a predetermined distance in a direction in which the insertion shaft portion 8 comes out of the insertion hole 66. Is formed. And, in the locking portion 68c,
An abutting surface 74 is formed on which the abutting portion 10 comes into contact after moving a predetermined distance.

Even after the movement of this predetermined distance, the large diameter portion 52
Is separated from the valve seat 62, and the connection hole 58 is configured to be maintained in a state of being connected to the communication hole 42. Further, the predetermined distance is such that the protrusion 10 is restricted from separating from the engaging portion 68c against the biasing force of the spring 48 when an external force for rotating the plug 1 is applied.
It is sufficient if the distance is such that a step is formed between 8b and the locking portion 68c.

Next, the operation of the quick joint of this embodiment described above will be explained. First, as shown in FIG. 1, the plug 1
The protrusion 10 and the introduction portion 68a of the engagement groove 68 are aligned with each other, and the insertion shaft portion 8 is inserted into the insertion hole 66. As shown by the chain double-dashed line in FIG. 5, when the projecting portion 10 is inserted into the introducing portion 68a, the projecting portion 10 contacts the guide surface 70, and the projecting portion 10 contacts the guide surface 7
Slide along 0. At that time, the plug 1 rotates and is inserted in the axial direction.

When the insertion hole 66 of the insertion shaft portion 8 is inserted, the end portion of the insertion shaft portion 8 abuts against the tip of the shaft portion 54 of the valve body 50 and pushes the valve body 50 against the urging force of the spring 48. The large diameter portion 52 is separated from the valve seat 62. Further, when the plug 1 is inserted, the protrusion 10 abuts the horizontal surface 72, and the insertion of the plug 1 is restricted. The valve body 50 is pushed in the communication hole 42 against the urging force of the spring 48, as shown by the chain double-dashed line in FIG.

Thereafter, when the plug 1 is rotated, the protrusion 1
0 slides in the horizontal portion 68b along the horizontal plane 72, and when the projection 10 enters the locking portion 68c, the projection 10 is guided along the locking portion 68c, and the projection 10 is inserted into the insertion shaft portion. Along with 8, return to the axial direction for a predetermined distance. Then, the protrusion 10 contacts the contact surface 74, and the protrusion 10 is pressed against the contact surface 74 by the biasing force of the spring 48.

On the other hand, during this time, the valve body 50 returns in the axial direction by a predetermined distance similarly to the protrusion 10, but the large-diameter portion 52 has the valve seat 6 at
2, the connection hole 58 and the communication hole 42 are communicated with each other so that the flow path is communicated. For example, tap water from the tap of the tap passes through the through hole 14 from the inside of the hose 4, and the bottomed hole 56,
The hose 2 through the connection hole 58, the communication hole 42, and the through hole 38.
It flows to zero.

In this connected state, even if an external force for rotating the plug 1 is applied, the projecting portion 10 in the locking portion 68c is pressed against the contact surface 74 by the urging force of the spring 48, and is pushed for a predetermined distance. Thus, the plug 1 is restricted from coming off from the engaging portion 68c, and the plug 1 does not easily come off from the socket 16.

When the plug 1 is removed from the socket 16, the plug 1 is pushed against the biasing force of the spring 48. When the protrusion 10 hits the horizontal surface 72 and its movement is restricted, the plug 1 is then rotated. Thereby, the protrusion 10 slides in the horizontal portion 68c along the horizontal plane 72,
When the protrusion 10 enters the introduction portion 68 a, the plug 1 can be removed from the socket 16. At this time, the large-diameter portion 52 of the valve body 50 is seated on the valve seat 62 by the biasing force of the spring 48, and the flow path is blocked.

As described above, in the quick joint of this embodiment, the protrusion 10 formed in the plug 1 and the engagement groove 68 formed in the socket 16 are engaged with each other, and the valve body 50 is seated on the valve seat 62. Since the spring 48 urging the plug 1 restricts the disengagement of the protrusion 10 from the engagement groove 68, the plug 1 and the socket 16 can be connected and disconnected with a simple configuration having a small number of parts. Further, since the plug 1 can be connected and disconnected by operating the plug 1 with one hand, the operation is also easy.

In this embodiment, the valve body 50 is housed inside the socket 16. However, when the valve body is housed inside the plug 1, the valve body is inserted when the plug 1 is inserted into the socket 16. It is also possible to provide a shaft portion for pushing against the biasing force of the spring in the socket 16 in the same manner. Further, in this embodiment, the projection 10 is formed on the plug 1 and the engagement groove 68 is formed on the socket 16, but instead of this, the projection is formed in the insertion hole 66 of the socket 16 to insert the plug 1. Even if the engaging groove is formed on the outer periphery of the shaft portion 8, the same operation can be performed.

The present invention is not limited to the embodiments as described above, and can be carried out in various modes without departing from the scope of the present invention.

[0035]

As described above in detail, in the quick joint of the present invention, the protrusion is engaged with the engaging groove, and the protrusion is engaged by the spring for urging the valve body in the direction to be seated on the valve seat. Since the detachment from the mating groove is regulated, connection and disconnection can be performed with a simple configuration with a small number of parts, and since the connection and disconnection can be performed by operating with one hand, there is an effect that the operation is also easy. . Further, by configuring the engagement groove with the introduction portion, the horizontal portion, and the locking portion, the protrusion is guided by these, and the operation is facilitated, and it is possible to guide the reliable operation. .

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a quick joint as an embodiment of the present invention when not connected.

FIG. 2 is a cross-sectional view of the quick joint of this embodiment when connected.

FIG. 3 is an AA end view of FIG.

FIG. 4 is a plan view of the socket of this embodiment.

FIG. 5 is a development view of the engagement groove of the present embodiment.

FIG. 6 is a sectional view of a conventional quick coupling.

[Explanation of symbols]

 1,100 ... Plug 8 ... Insertion shaft 10 ... Projection 16,106 ... Socket 48 ... Spring 50 ... Valve element 62 ... Valve seat 66 ... Insertion hole 68 ... Engagement groove

Claims (3)

[Claims] 1. A plug and a socket to which the plug is axially inserted and connected, one of which has a valve body internally biased by a spring in a seating direction of a valve seat, and the valve when not connected. A body is seated on the valve seat to block the flow path, and at the time of connection, the valve body is pushed by the other end against the biasing force of the spring and is separated from the valve seat to communicate with the flow path. In the joint, an engaging groove is formed in which one of the plug or the socket is formed with a protrusion protruding in the radial direction, and the other is inserted with the protrusion during connection, and the protrusion is slidable by relative rotation. And the engagement groove is formed so as to be able to regulate the disengagement of the protrusion by the urging force of the spring at the time of connection. 2. The quick joint according to claim 1, wherein the protrusion is formed on the plug and the engagement groove is formed on the socket. 3. The engaging groove includes an introduction portion into which the protrusion is inserted when the plug is inserted into the socket, a horizontal portion in which the protrusion slides due to relative rotation, and an attachment portion of the spring. The quick joint according to claim 1 or 2, further comprising: a locking portion that restricts the protrusion from entering and separating by a force.