JP3363307B2 - Flow switching faucet with water stop function - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention allows the operation shaft to be moved back and forth by operating the handle to switch the water flow to, for example, the water discharge pipe side or the shower side, and the operation shaft is set to an intermediate position to simultaneously stop water. The present invention relates to a flow path switching faucet with a water blocking function.

[0002]

2. Description of the Related Art As a water faucet mainly used in a bathroom, a mixing ratio of hot water and water is adjusted in advance, and hot water is discharged to a water discharge pipe side or a shower side by a hand operation during use. A flow path switching faucet with a water stop function, which can be switched and can stop water at the same time on both the discharge pipe side and the shower side by setting the handle device to an intermediate position when not in use, is disclosed in JP-A-7-243540. Are known.

In this flow path switching faucet with a water stop function, two secondary side flow paths are formed on both sides of one primary side valve chamber so as to communicate with each other through valve seat openings, and the primary valve chamber and the primary valve chamber are connected to each other. An operation shaft penetrating the secondary side flow passage is provided so as to advance and retreat in the valve seat opening by a rotating operation of a handle, and two valve bodies facing the valve seat opening are slid in the axial direction on the operation shaft. A structure in which a coil-shaped spring is interposed between the valve bodies so that the valve bodies can be closely attached to the valve seat opening by the elasticity of the springs so that simultaneous water stoppage and flow path switching can be performed. Is.

By the way, in this flow path switching faucet with a water stop function, when the operation shaft is rotated, the rotational force of the operation shaft is transmitted to both valve bodies, and the valve body maintaining one closed state is the valve seat. It does not rotate because it remains in close contact with the mouth, but the other open valve element rotates with the operating shaft. Therefore, the spring interposed between the valve bodies is twisted, and the spring exerts a restoring force for returning the twist on the operation shaft through the valve body, and the operation shaft is stopped. Since it is rotated in the direction, the water may stop regardless of the user's intention.

On the other hand, the self-closing preventing mechanism of the switching valve according to the actual opening flat 3-60661 discloses devised the above drawbacks as eliminate plugs, slip formed by a low friction material between the valve body and the spring by interposing the ring, although the valve body of the rotary has been made as to try to prevent the return of the valve body is not transmitted to the spring, foreign matter of scale, etc. or the slip ring deformed by hot water flow It was difficult to maintain a low friction state for a long period of time due to the adherence of, so that the above-mentioned defects could not be fundamentally eliminated.

[0006]

Therefore, the present invention completely eliminates the possibility that the spring interposed between both valve bodies in the flow path switching faucet with a water shut-off function will be twisted by the rotation of the operating shaft. This is intended to solve the conventional drawback that the water naturally returns to the water-stop state after the opening operation.

[0007]

To this end, according to the present invention, two secondary side flow passages are formed on both sides of one primary side valve chamber so as to communicate with each other through a valve seat opening. And an operation shaft penetrating the secondary side flow passage so as to advance and retreat in the valve seat opening by rotating the handle, and two valve bodies facing the valve seat opening are slid in the axial direction on the operation shaft. A flow passage with a water stop function that is movably supported and that the valve body is brought into close contact with the valve seat opening by elasticity of a spring interposed between the valve bodies so that simultaneous closing and flow passage switching are performed. In the switching faucet, the two valve bodies are connected to each other so that relative rotation is impossible. Further, the present invention is characterized in that, in the above-described flow path switching faucet with a water stop function, two valve bodies are connected to each other by forming a concave portion and a convex portion that mesh with each other on the back side thereof. Further, the present invention is characterized in that, in the above-described flow path switching faucet with a water stop function, two valve bodies are connected via a connecting member.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to the drawings. The present invention is applied to a thermostat type hot and cold water mixing valve which is mainly used by being attached to a wall surface of a bathroom. 1 is a socket (with a strainer) communicating with a hot water source, The hot water mixing valve is connected to and supported by the sockets 1 and 2 by a socket (with a strainer) communicating with a water supply source.

Reference numeral 3 denotes a temperature adjusting dial knob for adjusting the mixing ratio of hot water and water so that hot water having a desired temperature can be obtained, and a thermostat (not shown) is built in the botte 4. Hot water at the desired temperature is always
It is designed so that it can flow out to the primary side valve chamber 5 in the inner lower part.

Reference numeral 6 denotes a cylindrical bonnet screwed and fixed in the opening of the body 4, and the primary side valve chamber 5 is formed on the rear side of the bonnet 6. A secondary side flow passage 7 and a secondary side flow passage 8 are formed on both sides (front and rear sides) of the primary side valve chamber 5. The secondary side flow path 7 is a bonnet 6
The side wall opening of the bonnet 6 formed therein communicates with the water discharge pipe 9, and the secondary side flow passage 8 includes an elbow 10 and a shower hose 11.
It is connected to the shower head 12 via.

Further, the primary side valve chamber 5 and the secondary side flow path 7 are communicated with each other through a valve seat 13 which can be opened and closed by a valve body 13,
The primary side valve chamber 5 and the secondary side flow passage 8 are communicated with each other via a valve seat opening 16 which can be opened and closed by a valve body 15.

Reference numeral 17 denotes an operation shaft having a handle 18 fixed to an outwardly projecting end portion with a screw 19. The operation shaft 17 is moved forward and backward by screwing a screw shaft portion 20 into the bonnet 6. The O-ring 21 provided inside the screw shaft portion 20 prevents water leakage from the secondary side flow path 7. Reference numeral 22 denotes an axial extension portion integrally fixed to the inner surface of the operation shaft 17, and the extension portion 22 is the valve seat opening 1
4 through the primary side valve chamber 5 and the tip thereof projects to the secondary side flow passage 8.

The valve body 1 facing the valve seat opening 14 and the valve body 1 facing the valve seat opening 16 are provided on the extension portion 22 of the operating shaft 17.
5 are inserted and supported slidably in the axial direction.
Rubber packings 24 and 25 are attached to the surface of the valve body 13 facing the valve seat opening 14 and the surface of the valve body 15 facing the valve seat opening 16 for better sealing.

Further, as shown in FIG. 4, the cylindrical portions on the back side of the valve bodies 13 and 15 are cut out in semicircular shapes to form a concave portion 26 and a convex portion 27, and the valve body 13 and the convex portion 27 are formed. When the valve body 15 is fitted into the extension portion 22 of the operation shaft 17, the concave portion 26 and the convex portion 27 are engaged with each other so that the two
The two valve bodies are connected so that relative rotation is impossible. A coil-shaped spring 23 is interposed between the valve bodies 13 and 15 in a compressed state, and the elasticity thereof causes the valve body 13 to move.
To the valve seat opening 14 and the valve body 15 to the valve seat opening 16 respectively. In addition, the slidable range of the valve body 13 is the operation shaft 1
7 is limited from the inner side surface, and the slidable range of the valve body 15 is limited by the head portion 29 of the extension portion 22.

In the enlarged view of the main part of the flow path switching faucet with a water stop function shown in FIG. 5, both valve seat openings 14 and valve seat openings 16 are respectively provided in the valve body 1.
3 shows a state in which the valve bodies 15 are simultaneously closed. In this state, the valve body 13 and the valve body 15 are in close contact with each other by the elasticity of the spring 23 and the water pressure of the primary side valve chamber 5 at the valve seat opening 14 and the valve seat opening 16 so that both flow paths are stopped.

Further, by rotating the operating shaft 17 with a handle 18 in a predetermined direction in FIG. 6, the operating shaft 17 is retracted to the left in the figure, and the valve body 15 is engaged with the head portion 29 of the operating shaft 17. The valve body 15 is separated from the valve seat opening 16 and the primary side valve chamber 5
Hot water from the secondary side flow passage 8, elbow 10, shower hose 1
1 shows the situation where water is being sprinkled onto the shower head 12 through 1. When the operating shaft 17 is rotated in this way, its rotational force is transmitted to the valve body 15, but the valve body 15 cannot rotate unless the valve body 13 meshes with the valve body 13 and the valve body 13 rotates. 1
Since 3 is in a state of being in close contact with the valve seat opening 14 and cannot rotate, the valve body 15 is eventually separated from the valve seat opening 16 without rotating. Therefore, the spring 23 does not twist and the valve seat opening 1
6 can be opened. Therefore, it is possible to prevent the unnecessary return of the valve body 15 as in the conventional case.

Although not shown, when the operating shaft 17 is rotated in the opposite direction to separate the valve body 13 from the valve seat opening 14 and the hot and cold water of the primary side valve chamber 5 is discharged to the water discharge pipe 9, the valve body is also discharged. 1
Since 3 is meshed with the other valve body 15, twisting of the spring 23 is prevented without accompanying rotation, and the valve body 13 does not naturally close as in the conventional case.

The valve body 13 and the valve body 15 shown in FIG. 7 show an embodiment in which a plurality of concave portions 26 and convex portions 27 which mesh with each other are formed on the back side thereof, and the one shown in FIG. Pin-shaped protrusions 27 are provided on the back sides of the valve bodies 13 and 15.
And a concave portion 26 in the shape of a shaft hole in which the convex portion 27 is loosely fitted.
By forming each of them, they are connected to each other so that they can be separated and approached in the axial direction freely and cannot rotate relative to each other.

As shown in FIG. 9, the means for connecting the valve bodies 13 and 15 to each other is as follows. By forming the male spline portion 30 and the female spline portion 31 which can be loosely fitted to each other in a male-female state, they can be freely separated and approached in the axial direction and cannot be rotated relative to each other.

Further, the valve body 13 and the valve body 15 shown in FIG.
And are connected so that relative rotation is impossible with a cylindrical connecting member 32 interposed. That is, the convex ridges 33 in the axial direction are formed at appropriate intervals on the outer peripheries of the cylindrical portions on the back side of the valve bodies 13 and 15, and the convex ridges 33 are formed on both end edges of the connecting member 32.
Forming a notch 34 in which the ridge 3 is loosely fitted.
By making 3 slidable in the axial direction, the valve body 13
The valve body 15 and the valve body 15 are connected to each other so as to be spaced apart from each other in the axial direction so that they can approach each other, and such a configuration can be adopted.

[0021]

As described above, the flow path switching faucet with a water shut-off function of the present invention can eliminate the twisting of the spring caused by the rotational operation of the operating shaft, and the conventional valve body. It is possible to completely prevent the self-closing caused by the return. In addition, since a simple structure in which the two valve bodies are connected to each other so as to prevent relative rotation is sufficient, there is an advantage that the function is not lost for a long period of time.

[Brief description of drawings]

FIG. 1 is an external perspective view of a flow path switching faucet with a water stop function according to the present invention.

FIG. 2 is an exploded perspective view of the flow path switching faucet with a water stop function of FIG.

FIG. 3 is a vertical cross-sectional view of the flow path switching faucet with a water stop function of FIG.

FIG. 4 is a perspective view of a valve body.

5 is an enlarged view of a main part of FIG.

6 is an operation state diagram of FIG. 5.

FIG. 7 is a perspective view showing another embodiment of the valve body.

FIG. 8 is a perspective view showing another embodiment of the valve body.

FIG. 9 is a perspective view showing another embodiment of the valve body.

FIG. 10 is a perspective view showing another embodiment of the valve body.

[Explanation of symbols]

5 Primary valve chamber 7,8 Secondary side flow path 13,15 valve body 14,16 valve seat 17 Operation axis 18 handles 22 Extension of operation axis 23 spring 26 recess 27 convex 32 Connection member

Claims (3)

(57) [Claims] 1. An operation for forming two secondary side flow passages on both sides of one primary side valve chamber so as to communicate with each other through respective valve seat openings, and penetrating the primary side valve chamber and the secondary side flow passage. A shaft is provided so as to advance and retreat in the valve seat opening by rotating a handle, and two valve bodies facing the valve seat opening are axially slidably supported on the operation shaft, respectively, and at the same time between the valve bodies. In a flow path switching faucet with a water stop function, the valve body is brought into close contact with the valve seat opening by elasticity of a spring interposed between the valve body and the valve closure, and two valve bodies are provided. A flow path switching faucet with a water shutoff function, which is connected to each other so that relative rotation is impossible. 2. The flow path switching faucet with a water stop function according to claim 1, wherein the two valve bodies are connected to each other by forming a concave portion and a convex portion that mesh with each other on the back side thereof. 3. The flow path switching faucet with a water stop function according to claim 1, wherein the two valve bodies are connected via a connecting member.