JPH0239113Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Industrial application field) This invention is designed to solve the problem of fluid supply and discharge, etc. in various fluid tools, fluid equipment, water and air piping, etc. This relates to a fluid coupling that is used to extend a length, branch into an appropriate number of parts, or assemble an appropriate number of parts.

(Prior Art) Conventionally, fluid couplings used for extending, branching, or converging fluid supply/discharge piping when supplying or discharging fluids, for example, consist of sockets and plugs, which are the main components. It is equipped with a locking mechanism, a valve mechanism, a sealing mechanism, etc. to quickly connect and disconnect.

In this fluid coupling, the main body cylindrical portion and the adapter are formed separately for reasons such as a built-in valve structure, and both members are integrated by screw connection.

(Problem to be solved by the invention) However, when the main body cylinder member and the adapter are constructed separately and the two parts are integrated by screw connection, a highly accurate tapping process is required, and both It was necessary to provide a jig locking part (similar to a nut part) for screwing the members together not only on the adapter side but also on the main cylinder member of the main body. In addition, when the main body cylinder member and the adapter are screwed together, there is a risk that the sealing member interposed to improve airtightness between the two members may be deformed by being twisted during the screwed connection, and furthermore, In order to maintain a stable bonding force without loosening, the tightening torque must be constant, which is a troublesome problem in processing and assembly.

(Purpose of the invention) This invention was made in view of the above-mentioned conventional problems.When a socket and/or a plug is constituted by a separate body consisting of a main cylinder member and an adapter, the main cylinder member of the main body This eliminates the need for high-precision tapping processing to connect the and adapter, and also eliminates any stress in undesirable directions such as twisting on the sealing member interposed to improve airtightness between the two members. The purpose of the present invention is to provide a fluid coupling that can maintain a stable connection between the main body cylinder member and the adapter, and that does not require strength design to cope with notch stress concentration in the threaded portion. It is said that

[Structure of the idea]

(Means for solving the problem) This invention consists of a plug having a fluid passage hole and a socket also having a fluid passage hole, and the socket and plug can be connected and separated by engaging and disengaging with an appropriate locking mechanism. In the fluid coupling, the socket and/or the plug is provided in the main body main cylinder, which has a plug or socket fitting part concentric with the fluid passage hole at the front part, and a caulking receiving recess formed in the circumferential direction at the rear part. The main body is composed of a member and an adapter having a cylindrical caulking part that fits on the outer circumferential side of the caulking receiving recess and a male thread or a female thread or a hose nipple for connecting to piping, a hose, etc. at the rear part. With a sealing member interposed between the cylindrical member and the adapter,
Means for solving the above-mentioned problems by fitting the inner peripheral side of the cylindrical caulking part and the caulking receiving recess, and crimping the cylindrical caulking part into the caulking receiving recess to integrate the two. It is something to do.

(Example) Figure 1 shows an example of this invention.
The fluid coupling 1 shown in the figure consists of a plug 11 connected to one side for supplying and discharging fluid, for example, a fluid consumption side, and a socket 21 connected to the other side, for example, a fluid supply side.

The plug 11 has an axial fluid passage hole 12 at its center, and a large diameter section 13 at the center.
It has a socket fitting part 14 on the socket 21 side of the large diameter part 13, and a lock ball engaging groove 15 is provided on one circumference of the outer circumference of this socket fitting part 14. On the opposite side thereof, there is provided a nipple portion 16 that is connected to a hose connected to a fluid consuming device (not shown).

Further, the socket 21 is divided into a socket body main cylindrical member 22 and an adapter 42. Among these, the socket main cylinder member 22
is the socket insertion part 14 provided on the plug 11.
A total of four taper holding holes 26 for lock balls 25 are formed at equal intervals in the circumferential direction in the cylindrical portion 24 forming the plug insertion portion 23. . Further, a locking portion 27 of the adapter 42 is formed on the outer peripheral portion of the cylindrical portion 24 . Similarly, on the outer periphery of the cylindrical portion 24, a sleeve 33 is provided with an inward protrusion 31 on the inner periphery side for fixing the lock ball 25, and has an uneven operating portion 32 on the outer periphery. They are slidably fitted. The adapter 42
A coil spring 34 is provided between the tip of the adapter 42 that is locked to the locking portion 27 and the side wall portion 31a of the inwardly protruding strip 31 of the sleeve 33. Further, the tip of the cylindrical portion 24 comes into contact with the inclined side wall surface portion 31b of the inwardly protruding portion 31 to prevent the sleeve 33, which is pressed rightward in FIG. 1 by the coil spring 34, from falling off. A sleeve stop 28 for this purpose is formed by bulging plastic deformation in the radially outward direction. A lock ball release space 35 is formed on the inner periphery of the sleeve 33 between the inclined side wall portion 31b and the sleeve stopper 28 when the sleeve 33 is slid leftward in FIG. 1 against the coil spring 34. ing. Furthermore, the socket main cylinder member 22 is provided with a cylindrical protrusion 29 extending from the rear end portion of the cylindrical part 24. A caulking recess 30 is provided in the circumferential direction.

The adapter 42 has an axial fluid passage hole 43 at its center, and has a cylindrical caulking part 44 on its outer periphery that fits into the caulking receiving recess 30 from the outer circumferential side, and further includes a nut part. 45 and a male threaded portion 46, and by caulking the cylindrical caulking portion 44 toward the caulking receiving recess 30, the socket body main cylindrical member 22 and the adapter 42 are integrally coupled to form a socket body. It consists of A snake-eye seal member 51 that also serves as a valve seat is provided between the socket body main cylindrical member 22 and the adapter 42 that are connected in this way, and abuts against this seal member 51 that also serves as a valve seat to allow fluid to pass through. A valve 52 for blocking the holes 12 and 43 is disposed in a state where it is pressed toward the valve seat by a conical coil spring 53.

Next, the operation of the above embodiment will be explained.

When connecting the plug 11 and the socket 21, the sleeve 33 in the state shown in FIG. 1 is slid to the left in FIG. 1 against the tension of the coil spring 34. At this time, the lock ball 25 becomes freely movable into the lock ball release space 35 formed on the inner circumferential side of the sleeve 33, so in this state, the socket insertion part 14 of the plug 11 and the plug insertion part 23 of the socket 21 are connected. Insert into each other. When this fitted state is completed, the holding hole 26 of the lock ball 25 and the lock ball engaging groove 15 are aligned.
When this state is reached, when you release your hand from the sleeve 33, the sleeve 33 moves to the right due to the repulsive force of the coil spring 34, and during this time the lock ball 25 is moved into the tapered holding hole 26 by the inclined side wall portion 31b. As the lock ball 25 is pushed in, it engages with the lock ball engaging groove 15 provided on the plug 11, and the inward protrusion 31 of the sleeve 33 regulates the position of the lock ball 25, so that the plug 11 and the socket 21 are completely connected. . Further, at the same time as the plug 11 is inserted, the valve 52 is pushed leftward in FIG.
Maintain communication with 3.

Above, plug 11 and socket 2 in the connected state
1, the sleeve 33 is slid leftward in FIG. 1 to form a lock ball release space 35 between the inclined side wall portion 31b and the sleeve stopper 28. At this time, the lock ball 25 is in a position where it can easily move toward the lock ball release space 35, so the socket 21 and the plug 11 are separated by the repulsive force of the conical coil spring 53 or by the separation operation between the socket 21 and the plug 11. Can be easily separated. During this process of separating the socket 21 and the plug 11, the lock ball 25
When the ball moves to the lock ball release space 35, the valve 52
comes into contact with a sealing member 51 that also serves as a valve seat to prevent fluid leakage.

FIG. 2 shows another embodiment of this invention, and in the socket 21 of the fluid coupling 1 of the embodiment shown in FIG. On the other hand, the socket 21 of the fluid coupling shown in FIG. The main body member 22 is the first
It is exactly the same as the one shown in the figure. That is, the adapter 42 has a fluid passage hole 43 in the center, and the caulking receiving recess 3 of the socket main cylinder member 22
By having a cylindrical caulking part 44 and a nut part 45 that fit into the cylindrical caulking part 44 and a nut part 45 from the outer peripheral side, and caulking the cylindrical caulking part 44 toward the caulking receiving recess 30,
The socket main body is constructed by integrally connecting the main cylinder member 22 and the adapter 42.

FIG. 3 shows yet another embodiment of this invention,
In the socket 21 of the fluid coupling shown in FIG. 3, a hose nipple 246 is attached to the adapter 42.
This shows the case where . In this case as well, the socket body main cylindrical member 22 is exactly the same as that shown in FIG. Although it has a cylindrical caulking part 44 that fits from the outer circumferential side, it does not have threaded parts 46, 146 as in the above two embodiments, but has an adapter 245 with a circular cross-sectional shape. Moreover, there is no tightening nut part using a jig or tool, which is required when screwing together the main cylinder member of the socket body and the adapter as in the conventional case. A cylindrical caulking part 44 is formed in the circumferential direction on the side of the main cylinder member 22 of the socket main body of the adapter 245, and the cylindrical caulking part 44 is attached to the caulking receiving recess 3.
By caulking toward 0, the socket body main cylindrical member 22 and the adapter 42 are integrally connected. The cylindrical crimping portion 44 is preferably crimped around the entire circumference, but may be partially crimped.

Although the above embodiments are all sockets, the present invention is equally applicable to plugs with built-in valves. In this case, a valve 152 for opening and closing the fluid passage hole 12 is provided inside the main cylinder member 122 of the plug main body, and is located near the rear of the main cylinder member 122 and oriented in the circumferential direction similarly to the main cylinder member 22 of the socket 21. A caulking receiving recess 130 is formed, and the adapter 42 of the socket 21 is formed at the front end of the adapter 142.
Similarly, by forming a cylindrical caulking portion 144 and caulking the cylindrical caulking portion 144 toward the caulking receiving recess 130, the main cylinder member 122 and the adapter 142 are integrally coupled. In addition, plug 11
In this case, it goes without saying that the adapter 142 includes a male thread type and a female thread type in addition to the illustrated hose nipple type.

The socket 21 and the plug 11 can be used in common because the main cylinder members 22, 122 have the same structure regardless of the male thread type of the adapters 42, 142 and two other types. Further, since the main cylinder members 22, 122 of the socket body or plug body and the adapters 42, 142 are not screwed together, there is no need to form a threaded part for connection. There is no need to provide a hooking part (such as a nut) for a jig used for screw connection on the member 22 or the plug main cylinder member 122, and therefore, the fluid coupling of the present invention has a joint structure that requires fewer assembly steps. It can be said.

Further, in each of the above embodiments, the socket 21
Although the plug 11 shown in FIG. 4 is provided with the valve 52, the present invention can also be applied to a socket without a valve.

[Effect of idea]

As described above, the fluid coupling according to the present invention, of the plugs and sockets constituting the fluid coupling, at least the socket and/or the plug containing the valve for opening and closing the fluid passage hole is divided into the main body cylindrical member and the adapter. A sealing member is interposed between the main body cylindrical member and the adapter, and a cylindrical shape provided on the outer peripheral side of the caulking recess provided in the main body main cylindrical member of the socket and/or plug and the adapter. Since the structure is such that the cylindrical caulking part is fitted into the caulking part and the cylindrical caulking part is caulked into the caulking receiving recess and integrated, the seal is used when integrating the main body cylindrical member of the socket and/or plug with the adapter. Stress in undesirable directions such as torsion is not applied to the member at all, but rather it is possible to easily apply force in the compressive direction that is preferable for improving the sealing performance of the sealing member when crimping and fixing the main body. The connection between the main cylinder member and the adapter can be completed in a shorter time than a screw connection, and there is no need to form a threaded part for the connection, so the design must take into account notch stress concentration in the threaded part. The present invention has great practical value as a fluid coupling which has a simple structure and has excellent attaching/detaching operability and sealing properties.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional side view of a quarter part of a fluid coupling showing one embodiment of this invention, Figs. 2 and 3 are longitudinal cross-sectional views of only a socket, showing other embodiments of this invention, and Fig. 4. FIG. 2 is a quarter longitudinal cross-sectional side view showing an example of a plug. DESCRIPTION OF SYMBOLS 1...Fluid coupling, 11...Plug, 12...Fluid passage hole of plug, 14...Socket insertion part, 2
DESCRIPTION OF SYMBOLS 1... Socket, 22... Main cylindrical member of the main body of the socket, 23... Plug insertion part, 30... Caulking receiving recess, 42... Adapter, 43... Fluid passage hole of the socket, 44... Cylindrical caulking Part, 122...Plug main body main cylindrical member, 130...Caulking receiving recess,
142...adapter, 144...cylindrical caulking part.

Claims (1)

[Scope of utility model registration request] A fluid coupling consisting of a plug having a fluid passage hole and a socket also having a fluid passage hole, in which the socket and the plug are formed so that they can be connected and separated by engaging and disengaging with an appropriate locking mechanism, wherein the socket and/or the plug are The body main cylindrical member has a plug or socket insertion part concentric with the fluid passage hole in the front part and a caulking receiving recess formed in the circumferential direction in the rear part, and is fitted on the outer peripheral side of the caulking receiving recess. It has a cylindrical caulking part and is composed of a split body with an adapter having a male thread, a female thread, or a hose nipple for connecting to piping, hoses, etc. at the rear, and a sealing member is interposed between the main body cylindrical member and the adapter. The fluid coupling is characterized in that the inner peripheral side of the cylindrical caulking part and the caulking receiving recess are fitted in this state, and the cylindrical caulking part is caulked to the caulking receiving recess to integrate the two.