JP2999682B2 - Quick fitting - Google Patents

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 Hitherto, as disclosed in Japanese Utility Model Publication No. 45-11753 and Japanese Utility Model Publication No. 3-9563, various quick couplings which can be quickly connected and disconnected have been known. .

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

An operation sleeve 114 is provided on the outer periphery of the cylindrical portion 108.
Are slidably fitted, and a tapered portion 116 is formed on the inner periphery of the operation sleeve 114 so as to correspond to the steel ball 112. The operation sleeve 114 is urged 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. Thereby, the end of the valve opening shaft 120 of the socket 106 comes into contact with the valve body 122 of the plug 100, and as shown in FIG.
2 is pushed away from the valve seat 126 against the urging force of the spring 124.

On the other hand, when the insertion shaft portion 102 is inserted into the cylindrical portion 108, the steel ball 112 is fitted into the groove 104, and the operation 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 does not come off.

At the time of removal, the operator slides the operation sleeve 114 with the left hand against the urging force of the spring 118 so that the steel ball 112 can move in the radial direction when the tapered portion 116 passes through the steel ball 112. 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, use both hands to connect and disconnect, especially when removing
There is a problem that both hands for operating the operation sleeve 114 and for holding the plug 100 are required.

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

[0010]

In order to achieve the above object, the present invention has the following structure as means for solving the problems. That is, a plug and a socket to which the plug is inserted and connected in the axial direction are provided, and a valve body urged in a seating direction of a valve seat by a spring is provided in one of the plugs. In a rapid joint, the valve body is pushed against the urging force of the spring by the other end when the valve body is seated on the valve seat to shut off the flow path, and the valve body is separated from the valve seat and communicates with the flow path. A radially projecting protrusion is formed on one of the plug or the socket, and an engaging groove on which the protrusion is inserted and slidable by relative rotation is formed on the other when the connection is established. The engagement groove is formed so as to be able to regulate detachment of the protrusion by the urging force of the spring at the time of connection.
The engagement groove is used to insert the plug into the socket.
Relative to the introduction portion into which the protrusion is inserted.
A horizontal portion on which the protrusion slides, and a biasing force of the spring.
And a locking portion for restricting the projection from entering and leaving.
At the same time, the introduction section has an inclined gas that the projection comes into contact with.
The rapid joint, which is characterized by the formation of
It is.

[0011]

The quick coupling having the above-described structure is connected with a plug at the time of connection.
Is inserted into the socket, the end of the
Push against the spring to separate it from the valve seat and connect the flow path.
You. Further, the protrusion is inserted into the engagement groove.

When the protrusion is inserted into the introduction portion, the protrusion is
And the protrusion slides along the guide surface. That
When the plug and socket rotate relative to each other,
Inserted in the direction. Sliding the horizontal part by relative rotation
The part enters the locking part and the disengagement is regulated.

Also, when detached, it resists the urging force of the spring.
Release the projection from the engagement groove and rotate it relatively to engage.
The protrusion is pulled out from the engagement groove by sliding in the mating groove. this
When the end is separated from the valve body, the valve body is
It sits on the valve seat and shuts off the flow path.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, reference numeral 1 denotes a plug,
A flexible hose 4 is inserted into the joint portion 2 of the first embodiment, and a tubular metal fitting 6 is inserted and crimped into the hose 4 to prevent the hose 4 from coming off. The tip of the hose 4 is connected to a tap for water supply, a main valve for gas, and the like.

The plug 1 is provided with an insertion shaft 8, and the insertion shaft 8 is formed with two cylindrical projections 10 projecting in the radial direction on the same line. Is fitted with an O-ring 12. As shown in FIG. 2, a through hole 14 is formed at the center of the plug 1 in the axial direction, and communicates 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, and a cylindrical fitting 22 is inserted into the hose 20 and swaged to prevent the hose 20 from coming off. It is planned. The end of the hose 20 is connected to a tap water consuming destination or a gas consuming destination, for example, a washing unit or a tank using tap water.

A male screw portion 24 is provided on the outer periphery of the tip of the socket 16.
Are formed, and a flange portion 26 is formed, and a pin portion 28 protruding toward the male screw portion 24 is provided upright on the flange portion 26. The socket 16 has a large-diameter hole 32 formed in the housing 30 and a male screw portion 24 having the same diameter as the housing 30.
The pin portion 28 is inserted into a small-diameter hole 34 formed in the hole. 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
The rotation is stopped by.

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

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. It is formed so as to project toward it. A bottomed hole 56 is formed in the shaft portion 54 in the axial direction from the tip side, 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. The shaft portion 54 of the valve body 50 penetrates the packing 60 and protrudes toward the storage hole 46. I have. A valve seat 62 is formed such that the large-diameter portion 52 is seated on the packing 60.

An insertion member 64 is inserted into the storage hole 46 so as to contact the packing 60, and an insertion hole 66 into which the insertion shaft 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 body 50 is inserted into the insertion hole 66 and is configured to be slidable.

The inner surface of the insertion hole 66 has two engagement grooves 68.
Are formed symmetrically, and the two engaging grooves 68 have the same shape. One of the engaging grooves 68 will be described with reference to FIG. The engagement groove 68 allows the protrusion 10 to be inserted thereinto,
4 is provided with an introduction portion 68a that is open at the upper end surface, and the introduction portion 68a is formed with an inclined guide surface 70 with which the protrusion 10 contacts .

The horizontal portion 68 is connected to the introduction portion 68a.
b is formed, the protrusion 10 is formed so as to be slidable in the horizontal portion 68b, and the horizontal surface 7 on which the protrusion 10 abuts.
2 are formed. When the projection 10 comes into contact with the horizontal surface 72, the end of the insertion shaft 8 comes into contact with 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. Are separated from the valve seat 62, and the lengths of the insertion shaft 8 and the shaft 54 are determined so that the connection hole 58 is communicated with the communication hole 42.

The locking portion 68c is connected to the horizontal portion 68b.
The protrusion 10 is formed so as to be slidable in the locking portion 68c, and the locking portion 68c moves the protrusion 10 by a predetermined distance in a direction in which the insertion shaft portion 8 comes out of the insertion hole 66. It is formed as follows. And, in the locking portion 68c,
An abutting surface 74 is formed to abut after the protrusion 10 has moved a predetermined distance.

Even after this predetermined distance, the large-diameter portion 52
The connection hole 58 is configured to be separated from the valve seat 62 and to maintain a state in which the connection hole 58 communicates with the communication hole 42. The predetermined distance is set to such an extent that the protrusion 10 is restricted from coming off from the locking portion 68c against the urging force of the spring 48 when an external force for rotating the plug 1 is applied.
Any distance may be used as long as a step is formed between 8b and the engaging portion 68c.

Next, the operation of the quick coupling of the present embodiment will be described. First, as shown in FIG.
The projection 10 is aligned with the introduction portion 68a of the engagement groove 68, and the insertion shaft 8 is inserted into the insertion hole 66. As shown by a two-dot chain line in FIG. 5, when the protrusion 10 is inserted into the introduction portion 68a, the protrusion 10 comes into contact with the guide surface 70, and the protrusion 10
Slide along zero. 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 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. Furthermore, when the plug 1 is inserted, the protrusion 10 abuts on the horizontal surface 72, and the insertion of the plug 1 is regulated. The valve element 50 is pushed in the communication hole 42 against the urging force of the spring 48 as shown by a two-dot chain line in FIG.

Thereafter, when the plug 1 is rotated, the protrusion 1
0 slides in the horizontal portion 68b along the horizontal surface 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. 8 and returns to the predetermined distance axis direction. Then, the projection 10 comes into contact with the contact surface 74, and the projection 10 is pressed against the contact surface 74 by the urging 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 in the same manner as the protruding portion 10, but the large-diameter portion 52
2, the connection hole 58 and the communication hole 42 communicate with each other to communicate with the flow path. For example, tap water from a tap of the water supply passes through the through hole 14 from inside the hose 4 and passes through the bottomed hole 56,
The hose 2 through the connection hole 58, the communication hole 42, and the through hole 38;
Runs to zero.

In this connected state, even when an external force for rotating the plug 1 is applied, the projection 10 in the engaging portion 68c is pressed against the contact surface 74 by the urging force of the spring 48, and the pressing force is pushed for a predetermined distance. As a result, the plug 1 is prevented from being detached from the locking portion 68c, and the plug 1 is not easily removed from the socket 16.

When removing the plug 1 from the socket 16, the plug 1 is pushed against the urging force of the spring 48. Then, when the protrusion 10 collides with the horizontal surface 72 and movement is restricted, the plug 1 is rotated next. Thereby, the protrusion 10 slides in the horizontal portion 68c along the horizontal surface 72,
When the protrusion 10 enters the introduction portion 68a, the plug 1 can be removed from the socket 16. At that time, the large diameter portion 52 of the valve body 50 is seated on the valve seat 62 by the urging force of the spring 48, and the flow path is shut off.

As described above, in the quick coupling of the present embodiment, the projection 10 formed on the plug 1 is engaged with the engagement groove 68 formed on the socket 16, and the valve body 50 is seated on the valve seat 62. The protrusion of the projection 10 from the engagement groove 68 is regulated by the spring 48, so that the plug 1 and the socket 16 can be connected and disconnected with a simple configuration with a small number of parts. Also, by operating the plug 1 with one hand, connection and disconnection can be performed, so that operation is also easy.

In this embodiment, the valve body 50 is provided inside the socket 16. However, when the valve body is provided inside the plug 1 and the plug 1 is inserted into the socket 16, the valve body 50 is used. The present invention can be similarly implemented by providing a shaft portion on the socket 16 for pressing the shaft against the urging force of the spring. Further, in the present embodiment, the protrusion 10 is formed in the plug 1 and the engagement groove 68 is formed in the socket 16. Instead, a protrusion is formed in the insertion hole 66 of the socket 16 to insert the plug 1. Even if an engagement groove is formed on the outer periphery of the shaft portion 8, the present invention can be similarly implemented.

As described above, the present invention is not limited to such an embodiment, and can be implemented in various modes without departing from the gist of the present invention.

[0035]

As described above in detail, the quick coupling of the present invention engages the projection with the engagement groove, and biases the valve body in the direction of seating on the valve seat. Since the removal from the mating groove is regulated, it can be connected and disconnected with a simple configuration with a small number of parts, and since it can be connected and disconnected by operating with one hand, there is an effect that the operation is easy. . In addition, by forming the engagement groove with the introduction portion, the horizontal portion, and the locking portion, the projection is guided by these, so that the operation is facilitated, and it is possible to guide the operation so that the reliable operation is performed. .

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view of the quick coupling according to the embodiment at the time of connection.

FIG. 3 is an AA end view of FIG. 1;

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

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

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

[Explanation of symbols]

 1, 100 plug 8 insertion shaft 10 protrusion 16 106 socket 48 spring 50 valve body 62 valve seat 66 insertion hole 68 engagement groove

Claims (1)

(57) [Claims] 1. A plug having a plug and a socket to which the plug is inserted and connected in the axial direction, and a valve body urged in a seating direction of a valve seat by a spring is provided in one of the plugs. The body is seated on the valve seat to shut off the flow path, and when connected, the other end portion pushes the valve body against the urging force of the spring and separates from the valve seat to communicate with the flow path. In the joint, a protrusion protruding in the radial direction is formed on one of the plug or the socket, and the other is engaged with the protrusion when the connection is made, and the protrusion is slidable by relative rotation. The engagement groove is formed so as to be able to regulate the detachment of the protrusion by the urging force of the spring at the time of connection, and the engagement groove is formed by inserting the plug into the socket.
The introduction part into which the protrusion is inserted and the front part by relative rotation
The horizontal portion on which the projection slides, and the spring
And a locking portion for preventing the projection from entering and releasing.
In addition, the introduction portion has an inclined guide surface with which the protrusion contacts.
A quick joint characterized by being formed .