JP3572709B2 - Fluid coupling - Google Patents

Description

[0001]
[Industrial applications]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid coupling, and more particularly to a fluid coupling provided with a valve section on a supply-side connection body, and is used, for example, as a joint for supplying fire-extinguishing water such as a fire-extinguishing hose or a water discharge gun used in a fire. Is done.
[0002]
[Prior art]
In a conventional fluid coupling, a tubular supply-side connection body provided with a valve portion is slidable by a shaft portion 101 in a tubular supply-side connection body 100 as schematically shown in FIG. 3, for example. The stopper member 104 is provided at the tip of the connector 100 so as to face the sliding trajectory of the valve member 102 and close the valve part 103 at the tip of the valve member 102. The body 105 is provided with a pressing member 106 for pressing the valve member 102 toward the rear end of the supply-side connector 100.
[0003]
When the supply side connection body 100 and the reception side connection body 105 are connected, the pressing member 106 presses the valve member 102, and the valve member 102 slides to the rear end side of the supply side connection body 100, and the valve member 102 The valve portion 103 at the tip is opened. As a result, the flow paths in the two connectors 100 and 105 communicate with each other. However, since the valve member 102 receives the fluid pressure P from the rear end side of the supply-side connecting body toward the tip 100A side at the pressure receiving surface 102a, when the valve portion 103 is opened, the fluid pressure P is reduced. Acts as a force. For this reason, the valve opening operation of the valve section 103 becomes difficult.
[0004]
In particular, in the case of a fluid coupling having a large flow rate, the pressure receiving surface 102a of the valve member 102 has a large area, so that the fluid pressure P acting as a reaction force when the valve portion 103 is opened also increases. Therefore, the force required to push the valve member 102 to open the valve portion 103 is further increased. For this reason, as the flow rate of the fluid increases, the force required for the valve opening operation of the valve portion 103 increases, so that the valve opening operation becomes extremely difficult.
[0005]
In the case of this joint, it is necessary to separately provide a lock means for holding the connection state between the supply side connection body 100 and the reception side connection body 105.
[0006]
The conventional example shown in FIG. 4 shows an example of a locking means of a fluid coupling. A pressing member 202 having a claw 201 is provided at a connection side end of one connecting body 200, and a connecting member 203 of the other connecting body 203 is provided. An engaging portion 204 is provided at the connection side end, and a slidable push-up member 205 is provided at the connection body 203, and the claw 201 of the connection body 200 is pushed up by the connection side end of the connection body 203. The connecting body 203 is inserted until the claw portion 201 is engaged with the engaging portion 204. As a result, the connection state between the two connectors 200 and 203 is locked. In order to release the locked state and remove the connection body 203 from the connection body 200, the push-up member 205 provided on the connection body 203 is slid to the connection side, and while the claw 201 is pushed up at the tip thereof, the engagement portion is engaged. This is performed by releasing the engagement state between the hook 204 and the claw 201.
[0007]
In the conventional example, as described above, when connecting or disconnecting the connecting body at the joint, it is necessary to operate by pushing up the claw 201 once with the tip of the connecting body 200 or the push-up member 205. In particular, when performing the removal operation, the claw 201 must be pushed up by the push-up member 205 to perform the operation while maintaining the state, so that the operation becomes complicated. In order to easily perform this operation, the claw portion 201 may be easily pushed up. However, if such an operation is performed, the engagement state between the engagement portion 204 and the claw portion 201 may be performed. Is uncertain. Therefore, in general, in order to ensure the engagement state between the claw portion 201 and the engagement portion 204, the claw portion 201 is not easily pushed up. However, the problem here is in the case of a fluid coupling with a large flow rate. That is, in the case of a joint having a large flow rate, the joint itself becomes large, so that a considerable force is required to push up the claw portion 201 of the pressing member 202, so that the operation of connecting and disconnecting the connecting body is very difficult. It will be.
[0008]
[Problems to be solved by the invention]
In view of the above circumstances, it is an object of the present invention to provide a fluid coupling that can easily perform a valve opening operation of a valve unit in a supply-side connection body even with a large-volume fluid coupling.
Another object of the present invention is to provide a fluid coupling capable of easily performing connection and disconnection operations of a connecting body in the fluid coupling.
[0009]
[Means for Solving the Problems]
[0010]
In order to achieve the above object, the fluid coupling according to the present invention is configured such that the front end of the supply-side connection cylinder is inserted into the rear end of the reception-side connection cylinder to allow the flow paths of the two cylinders to communicate with each other and to connect the two cylinders. A fluid coupling provided with a lock means for holding a state, wherein a slidable supply-side inner cylinder inserted into a distal end portion of the supply-side connection cylinder; and formed on both end surfaces of the supply-side inner cylinder. A pressure receiving surface; a stopper provided in the movement trajectory of the supply-side inner cylinder, for closing a valve at the tip of the supply-side inner cylinder ; a locking portion provided on the supply-side inner cylinder ; Opening / closing valve means for sliding the supply-side inner cylinder, the opening / closing valve means being slidably inserted into the receiving-side connection cylinder body. a recessed been receiving groove on the outer periphery of the supply side connecting cylindrical body; through-hole and provided to penetrate in the radial direction to the receiving side connecting cylindrical body; said through Housed, in the non-connection time both said cylindrical body, contact with the outer peripheral surface of the receiving-side inner cylinder, at the time of connection of the both cylinder, is accommodated over the receiving groove from the through hole A fluid comprising: a lock member; and a slidable cylindrical holding member provided on the outer peripheral side of the receiving-side connecting cylinder so as to restrict the movement of the lock member from the outer peripheral side of the receiving-side connecting cylindrical body. It is a joint.
[0011]
[Action]
In the supply-side connection cylinder at the time of non-connection, the pressure-receiving surfaces formed at both ends of the supply-side inner cylinder inserted into the supply-side connection cylinder have respective pressure-receiving faces parallel to the axis of the inner cylinder. The fluid pressures acting opposite to each other are acting at the same pressure, and the fluid pressures acting on the pressure receiving surfaces at both ends cancel each other out and are balanced. There is almost no fluid pressure acting in the axial direction of the inner cylinder. Further, the valve portion at this time is held in a closed state by the valve closing means of the valve portion, that is, in a state in which the tip of the supply-side inner cylinder abuts on the stopper portion.
[0012]
On the other hand, in the receiving-side connection cylindrical body at the time of non-connection, the movement of the sphere accommodated in the through-hole is regulated by the through-hole, the pressing member, and the receiving-side inner cylinder.
[0013]
When the supply-side connection cylinder is inserted into the reception-side connection cylinder and connected to each other, in the supply-side connection cylinder, the valve portion of the supply-side inner cylinder is opened by the valve-opening means. Slides toward the rear end of the supply-side inner cylinder, so that the tip of the supply-side inner cylinder separates from the stopper. On the other hand, in the receiving-side connecting cylinder, the receiving-side inner cylinder slides toward the distal end of the receiving-side inner cylinder, and the movement of the sphere by the receiving-side inner cylinder is released.
[0014]
Here, when the accommodation groove reaches the position of the through hole, the sphere moves toward the accommodation groove and is accommodated from the through hole to the accommodation groove. At this time, the pressing member is sliding to the rear end side, and the state in which the sphere is accommodated from the through hole to the accommodation groove is held by the pressing member. When the movement of the sphere is regulated in this way, the movement of the supply-side connection cylinder is also regulated, and the ball is locked so that the connection state with the reception-side connection cylinder is maintained.
[0015]
When the supply-side connection cylinder and the reception-side connection cylinder are connected and the valve portion of the supply-side connection cylinder is opened, the flow path in the supply-side connection cylinder and the flow path in the reception-side connection cylinder are separated. The fluid in the supply-side connection cylinder flows into the reception-side connection cylinder.
[0016]
Conversely, in order to remove both connection cylinders in the fluid coupling connected by inserting the supply-side connection cylinder into the receiving-side connection cylinder as described above, release the locked state of the two connection cylinders and remove. It should be in a state where it can be done. The release of the locked state can be performed only by sliding the pressing member toward the rear end side. By sliding the pressing member toward the rear end side, the contact state between the pressing member and the sphere is released, and the movement of the sphere regulated by the pressing member is released. As a result, the state where the sphere is accommodated from the through hole to the accommodation groove cannot be maintained, and the movement restriction of the supply-side connection cylinder is released, and the movement is restricted by engaging with the supply-side cylinder. The receiving side inner cylinder moves to the rear end side, and the supply side connecting cylinder body is pushed and moved to the rear end side by the movement of the receiving side inner cylinder. At this time, when the supply-side connection cylinder moves to the rear end side, the sphere accommodated in the accommodation groove of the supply-side connection cylinder is pushed by the accommodation groove and guided by the through-hole while the reception-side connection cylinder is being guided. Move toward the outer peripheral side of. When the supply-side connection cylinder moves to the rear end side, the movement of the supply-side inner cylinder is released, so that the supply-side inner cylinder moves to the front end side so as to close the valve portion until it comes into contact with the stopper. As a result, the locked state of the connection between the supply-side connection cylinder and the reception-side connection cylinder is released, and both cylinders can be removed.
[0017]
【Example】
An embodiment of the present invention will be described with reference to FIGS. In the drawings, the components denoted by the same reference numerals have the same names and the same functions.
[0018]
Reference numeral 1 denotes a supply-side connection cylinder in the fluid coupling J, and a flow path 2 formed inside the supply-side connection cylinder 1 and a slidable insert inserted into a distal end portion of the supply-side connection cylinder 1. A supply-side inner cylinder 3, a stopper portion 5 provided in a movement trajectory of the supply-side inner cylinder 3, and provided to close a valve portion 4 formed at a tip of the supply-side inner cylinder 3. The supply side inner cylinder 3 is urged toward the distal end side, that is, inserted into a spring member 10 provided to urge the valve portion 4 in the valve closing direction and a receiving side connection cylinder 20 described later. The projecting portion 15 is provided as a locking portion with which the engaging portion 26 of the receiving-side inner cylinder 23 engages and protrudes from the outer peripheral surface of the supply-side inner cylinder 3, and the spherical body 22 of the receiving-side connecting cylindrical body 20 also described later. And a housing groove 11 formed in the outer periphery of the supply-side connection cylinder 1 in the radial direction of the cylinder 1. The stopper 5 has a shaft portion 6 inserted into the inner cylinder 3 and the supply-side connection cylinder 1, and is fixed to the supply-side connection cylinder 1 by a fixing portion 7.
[0019]
A seal portion 13 is provided at a contact portion between the supply-side connection cylinder 1 and the inner cylinder 3 so as to prevent the fluid in the supply cylinder 1 from leaking to the outside. 5 is provided with a seal portion 12 at a portion where the tip of the inner cylinder 3 constituting the valve portion 4 contacts.
[0020]
The supply-side inner cylinder 3 inserted into the supply-side connection cylinder 1 has pressure receiving surfaces 8 and 9 facing the flow path 2 on both end surfaces. The pressure receiving surfaces 8 and 9 are formed so that the respective surfaces receive the fluid pressure acting on the respective pressure receiving surfaces 8 and 9 so as to be parallel to the axis of the supply-side inner cylinder 3 and opposed to each other. That is, the pressure receiving surface 8 receives the pressure P1 from the front end side of the supply side connection cylinder 1 toward the rear end side, and the pressure reception surface 9 receives the pressure P2 from the rear end side of the supply side connection cylinder 1 toward the front end side. It is formed as follows. In this embodiment, the pressure receiving surfaces 8, 9 are formed such that the fluid pressures P1, P2 received by the pressure receiving surfaces 8, 9 are the same, and the fluid pressures acting on the pressure receiving surfaces 8, 9 are mutually different. They are balanced by canceling each other out. Therefore, there is almost no fluid pressure acting on the pressure receiving surfaces 8 and 9 formed at both ends of the supply-side inner cylinder 3 in parallel with the axis of the inner cylinder 3.
[0021]
The supply-side inner cylinder 3 may be formed such that the rear end has a larger diameter at the rear end than the front end, and the pressure receiving surface 9 has a larger pressure receiving area. In this case, since the pressure-receiving surface 9 has a larger pressure-receiving area, the force acting on both ends of the supply-side inner cylinder 3 is larger at the fluid pressure P2 by the differential pressure. By doing so, the valve portion 4 formed at the tip of the supply-side inner cylinder 3 is pressed by the stopper 5, so that the sealing action of the seal portion 13 can be improved.
[0022]
The valve part 4 is provided at the tip of the supply side inner cylinder 3 as described above. The opening and closing operation of the valve portion 4 is performed by sliding the supply-side inner cylinder 3. As described above, the supply-side inner cylinder 3 is urged by the spring member 10 in the valve closing direction, that is, the direction from the rear end to the front end, and the supply-side inner cylinder 3 is directed from the front to the rear end. As long as no force is applied, the distal end is at a position where it comes into contact with the stopper portion 5 so as to close the valve portion 4, and the valve portion 4 is held in a closed state.
[0023]
To open the valve portion 4, the supply-side inner cylinder 3 may be slid to the rear end side. In this valve-opening operation, both end surfaces 8, 9 of the supply-side inner cylinder 3 are used as described above. The fluid pressure acting on the inner cylinder 3 acting in parallel to the axis of the inner cylinder 3 is almost nil. Therefore, even if the inner cylinder 3 is slid in the valve opening direction of the valve portion 4, the fluid pressure is not increased. It does not act as a reaction force to the sliding operation.
[0024]
Even when the fluid pressure acting on the pressure receiving surface 9 is set to be larger, the fluid pressure acting as a reaction force against the sliding operation of the supply-side inner cylinder 3 in the valve opening direction does not increase. , It does not act as a large reaction force.
[0025]
The supply-side inner cylinder 3 slid in the valve opening direction is provided so as to protrude from the inner peripheral surface of the supply-side connection cylinder 1 so that the stopper portion 14 is located on the sliding trajectory. The supply side inner cylinder 3 slid in the direction is locked here.
[0026]
On the other hand, the receiving-side connecting cylindrical body 20 radially penetrates the flow path 30 formed in the receiving-side connecting cylindrical body 20 and the plurality of receiving-side connecting cylindrical bodies 20 provided in the receiving-side connecting cylindrical body 20. Through-hole 21, a sphere 22 as a lock member housed in the through-hole 21, a slidable receiving-side inner cylinder 23 inserted into the receiving-side connecting cylinder 20, and a supply-side connecting cylinder An engaging portion 26 provided on the receiving side inner cylinder 23 so as to engage with the projection 15 of the inner cylinder 3 of the body 1, and a slidable cylindrical shape provided on the outer periphery of the receiving side connecting cylindrical body 20. Press member 24, a spring member 25 provided to urge the receiving side inner cylinder 23 to the rear end side, and a spring member 27 provided to urge the cylindrical press member 24 to the rear end side. And consisting of
[0027]
Reference numerals 31 and 32 denote sealing portions for preventing fluid from leaking outside when the supply-side connection cylinder 1 is connected to the reception-side cylinder 20.
[0028]
The sphere 22 is accommodated in the through hole 21 as described above. Here, the sphere 22 is accommodated such that a part, preferably half thereof, is exposed to the outer peripheral side of the cylindrical body 20. An engaging portion 28 having a substantially V-shaped cross section provided with an inclined surface 28a of the pressing member 24 is engaged with the exposed portion of the spherical body 22, and the pressing member 24 is locked here. Further, the outer peripheral surface of the receiving-side inner cylinder 23 is in contact with the spherical body 22 from the inner peripheral side of the cylindrical body 20. Therefore, the movement of the sphere 22 is restricted by the inner surface of the through hole 21, the engaging portion 28, and the outer peripheral surface of the receiving-side inner cylinder 23.
[0029]
When the inclined surface 28a of the engaging portion 28 having a rectangular cross section engages with the spherical body 22, the biasing force of the spring member 27 acting on the spherical body 22 through the inclined surface 28a is: The spherical body 22 acts to move toward the inner peripheral side of the cylindrical body 20 while being guided by the through hole 21. However, as described above, since the outer peripheral surface of the inner cylinder 23 restricts the movement of the sphere 22 from the inner peripheral side of the cylinder 20, the sphere 22 does not move.
[0030]
The pressing member 24 is locked by engaging with the sphere 22, but when the engagement state with the sphere 22 is released, the pressing member 24 slides until it is locked by the stopper portion 29.
[0031]
When connecting the fluid coupling J composed of the supply-side connection cylinder 1 and the reception-side connection cylinder 20, the supply-side connection cylinder 1 is inserted into the reception-side connection cylinder 20 and connected. When the supply-side connection cylinder 1 is inserted into the reception-side connection cylinder 20, first, the projection 15 of the supply-side inner cylinder 3 and the engaging portion 26 of the reception-side inner cylinder 23 are engaged, and The inner cylinder 3 and the receiving-side inner cylinder 23 each start sliding in a direction opposite to the side on which the inner cylinder 3 is engaged, and the valve portion 4 formed at the tip of the supply-side inner cylinder 3 starts to open. At this time, the fluid pressure acting on both ends of the supply-side inner cylinder 3 does not act as a reaction force against the sliding operation of the supply-side inner cylinder 3 as described above. The operation of inserting the supply side tubular body 1 so as to slide is easily performed. Here, even if the valve portion 4 starts to open due to the sliding of the supply-side inner cylinder 3, the fluid does not flow for a while due to inertia.
[0032]
When the supply-side connecting cylinder 1 is further inserted and the supply-side inner cylinder 3 and the receiving-side inner cylinder 23 further slide, respectively, the outer peripheral surface of the receiving-side inner cylinder 23 and the spherical body 22 are separated from each other, and the accommodation groove 11 is formed in the through hole. Reach position 21. When the accommodation groove 11 reaches the position of the through-hole 21, the sphere 22 moves toward the accommodation groove 11 while being guided by the through-hole 21, and a part thereof, preferably about half thereof, enters the accommodation groove 11 side. The remaining portion is accommodated from the through hole 21 to the accommodating groove while being located on the through hole 21 side. When the sphere 22 is accommodated from the through hole 21 to the accommodation groove 11, the engagement state between the sphere 22 and the engaging portion 28 of the cylindrical holding member 24 is released, and the holding member 24 is 27, it slides on the rear end side of the receiving-side connecting cylinder 20 until it is locked by the stopper portion 29, and the through-hole 21 is in a state as covered by the inner peripheral surface of the pressing member 24. And the sphere 22 contact. When the sphere 22 is accommodated as described above, its movement is regulated by the accommodation groove 11, the through hole 21, and the inner peripheral surface of the pressing member 24. Therefore, as long as this state is maintained, the sphere 22 moves. Never. When the spherical body 22 is held in that state, the movement of the supply-side cylindrical body 1 is regulated by the spherical body 22 accommodated in the accommodation groove 11, so that the supply-side cylindrical body 1 moves as long as the spherical body 22 does not move. Never. As a result, a locked state in which the supply-side connection cylinder 1 is inserted into the reception-side connection cylinder 20 and maintained in the connected state is achieved.
[0033]
At this time, the supply-side inner cylinder 3 is slid until locked by the stopper portion 14, and the receiving-side inner cylinder 23 engaged with the supply-side inner cylinder 3 is locked by the stopper portion 34. Sliding up. Thus, the movement of the supply-side inner cylinder 3 in the valve closing direction is regulated by the receiving-side inner cylinder 23, and the movement of the reception-side inner cylinder 23 in that direction is regulated by the stopper portion 34. As long as the supply-side connection cylinder 1 and the reception-side connection cylinder 20 are in the locked state, they are held. Therefore, as long as the connection state between the supply-side connection cylinder 1 and the reception-side connection cylinder 20 is locked, the valve unit 4 is always kept open.
[0034]
When the valve portion 4 is in the open state, the flow path 2 in the supply-side connection cylinder 1 and the flow path 30 in the reception-side connection cylinder 20 communicate with each other, and the fluid flows through the supply-side connection cylinder as indicated by an arrow A1. It flows from the body 1 to the receiving-side connecting cylinder 20. At this time, since the valve portion 4 is sufficiently open, the portion through which the fluid passes is large, and the pressure loss of the fluid is not so large.
[0035]
The reaction force of the fluid passing through the valve portion 4 acts in the direction in which the supply-side connection cylinder 1 is pushed out of the reception-side connection cylinder 20, but as described above, the locked state has already been achieved. The cylinder 1 is not pushed out.
[0036]
Conversely, to remove both connecting cylinders 1 and 20 of the fluid coupling J to which the supply-side connecting cylinder 1 is inserted and connected in the receiving-side connecting cylinder 20 as described above, What is necessary is just to release the locked state of 20 and make it in a state where it can be removed. The release of the locked state can be performed only by sliding the pressing member 24 to the rear end side. By moving the holding member 24 so as to release the locked state, the member urged by the spring member, whose movement has been restricted by being in the locked state, automatically returns to the state before connection by the urging force of the spring member. Go back. That is, when the pressing member 24 is slid to the rear end side and the contact state between the inner peripheral surface of the pressing member 24 and the spherical body 22 is released, the spherical body 22 regulated by the pressing member 24 is The movement restriction is released, and the state where the sphere 22 is accommodated from the through hole 21 to the accommodation groove 11 cannot be maintained. When the state is no longer maintained, the movement regulation of the supply-side connecting cylinder 1 is released, and the receiving member 25 engages with the supply-side cylinder 1 and the movement is regulated by the action of the spring member 27 of the receiving-side inner cylinder 23. The side inner cylinder 23 moves to the rear end side, and the movement of the receiving side inner cylinder 23 pushes the supply side connection cylinder 1 to the rear end side. At this time, when the supply-side connection cylinder 1 moves to the rear end side, the sphere 22 accommodated in the accommodation groove 11 of the supply-side connection cylinder 1 is pushed by the inclined surface 16 of the accommodation groove 11 and the through hole is formed. It moves toward the outer peripheral side of the receiving-side connecting cylindrical body 20 while being guided by the inner side surface of the cylindrical body 21, and a part thereof is exposed to the outer peripheral side of the cylindrical body 20 through the through hole 21. When the supply-side connecting cylinder 1 moves to the rear end side, the movement of the supply-side inner cylinder 2 is released, and the supply-side inner cylinder 2 moves to the front end side until it comes into contact with the stopper 5 so as to close the valve portion 4. Moving. Further, the holding member 24 is engaged with a portion of the spherical body 22 that has moved as described above and is exposed from the through-hole 21 by engaging an engaging portion 28 having a rectangular cross section at the tip thereof. Thereby, the locked state of the connection between the supply-side connection cylinder 1 and the reception-side connection cylinder 20 is released, and the two cylinders 1 and 20 can be removed.
[0037]
The fluid coupling J of the present invention is used, for example, as a water supply joint of a fire hose. In this case, for example, although not shown, a supply-side connecting cylinder 1 is provided on the fire hydrant side, and a receiving-side connecting cylinder 20 is provided on the receiving side of the fire hose, and both are connected and used.
[0038]
Although not shown, the fluid coupling J of the present invention is suitable for use as a water supply joint for a 100-meter-class water discharge gun or the like.
[0039]
【The invention's effect】
The fluid coupling acting on the present invention is as described above. The opening of the valve portion of the supply-side connection cylinder is performed by sliding the supply-side inner cylinder of the supply-side connection cylinder. Since the inner cylinder receives the fluid pressures facing each other in the axial direction on the pressure receiving surfaces formed at both end surfaces thereof, even if the fluid pressure itself becomes large in the large flow rate fluid coupling, the fluid pressures cancel each other. Since the fluid pressure acting as a reaction force to the sliding operation of the supply-side inner cylinder is equal to, or equal to, only the differential pressure of the canceling fluid pressure acts on the supply-side inner cylinder, Can be easily opened by sliding operation.
[0040]
The opening of the valve portion is performed in conjunction with a connection operation between the supply-side connection cylinder and the reception-side connection cylinder. When the supply-side connection cylinder and the reception-side connection cylinder are connected and the state is maintained, the valve-opening state of the valve section is also maintained. Therefore, when the connection state is established, the valve section is always opened. In state. When the supply-side connection cylinder and the reception-side connection cylinder are removed, the valve unit is also closed in conjunction with the removal operation. Therefore, since the opening and closing of the valve portion in the present invention is performed in conjunction with the connection operation of the connecting cylinder, the opening and closing operation of the valve portion can be easily performed.
[0041]
Furthermore, when connecting the supply-side connection cylinder and the reception-side connection cylinder, there is no need to perform an operation such as pushing up the claw portion as in the conventional example, and a spring member for urging the reception-side inner cylinder and the supply side are connected. The supply-side connection cylinder was inserted into the reception-side connection cylinder so that a force exceeding the elasticity of the spring member for biasing the inner cylinder acts on the reception-side inner cylinder and the supply-side inner cylinder, and was inserted to a predetermined position. Since the connection state is sometimes locked, the connection operation can be performed more easily than in the past.
[0042]
Furthermore, when removing the supply-side connection cylinder and the reception-side connection cylinder, there is no need to perform an operation of pushing up the claw portion as in the conventional example, and it is only necessary to slide the holding member to the rear end side, As a result, in conjunction with the receiving side inner cylinder being slid by the spring member so as to return to the position before the connection, the supply side connecting cylinder moves so as to be pushed out from the receiving side connecting cylinder, so that compared to the conventional example. It can be easily removed.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional front view of a state before connection of a fluid coupling according to an embodiment of the present invention.
FIG. 2 is a partial cross-sectional front view of the fluid coupling according to the embodiment of the present invention in a connected state.
FIG. 3 is a cross-sectional view of a fluid coupling including a conventional valve portion.
FIG. 4 is a sectional view of a conventional fluid coupling.
[Explanation of symbols]
J Fluid coupling 1 Supply side connection cylinder 2 Flow path 3 Supply side inner cylinder 4 Valve 5 Stopper 8 Pressure receiving surface 9 Pressure receiving surface 10 Spring member 11 Housing groove 15 Projection 20 Receiving side connection cylinder 21 Through hole 22 Sphere 23 Receiving Side inner cylinder 24 Pressing member 25 Spring member 26 Engaging portion

Claims (1)

A fluid coupling provided with a lock means for inserting the front end of the supply-side connection cylinder into the rear end of the reception-side connection cylinder to allow the flow paths of the two cylinders to communicate with each other and for maintaining the connected state of the two cylinders. So,
A slidable supply-side inner cylinder inserted into the distal end of the supply-side connection cylinder; pressure-receiving surfaces formed on both end faces of the supply-side inner cylinder; provided on a movement locus of the supply-side inner cylinder A stopper for closing a valve portion at the tip of the supply-side inner cylinder ; a locking portion provided on the supply-side inner cylinder ; and a slide engaged with the locking portion and inserted into the receiving-side connection cylinder. comprising a; consists the engaging portion of the freely receiving side inner tube, opening and closing valve means allowed to slide the supply side in the cylinder
Said locking means, said outer peripheral recessed in the receiving groove of the supply-side connecting cylindrical body and; are accommodated in the through hole; the through-hole and provided through the in a radial direction of said receiving-side connecting cylindrical body A lock member that is in contact with the outer peripheral surface of the receiving-side inner cylinder when the two cylinders are not connected, and is accommodated from the through hole to the accommodation groove when the two cylinders are connected ; And a slidable cylindrical pressing member provided on the outer peripheral side of the receiving side connecting cylinder so as to restrict the movement of the lock member from the outer peripheral side of the receiving side connecting cylindrical body. Fluid coupling.

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