JP2990583B2 - Switching valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching valve used for a faucet which can selectively use two types of outflow paths, such as a shower / bath faucet. The purpose is to eliminate.

[0002]

2. Description of the Related Art FIG. 2 shows an example of a conventional shower / bath faucet B. The faucet B includes a normal faucet 20 for discharging hot water to a bathtub or the like, and a sending unit 30 for hot water to a shower head (not shown). The switching of the flow path between the faucet 20 and the shower side delivery unit 30 is performed by operating the switching valve C inside the faucet by the switching handle 40 provided on the front part of the faucet B.

The structure of the switching valve C is, as shown in an enlarged view in FIG. 3, with respect to a spindle case 12 fixed to a faucet.
The spindle 11 is screw-fitted. Spindle 1
A bolt-shaped sliding shaft 18 is screwed to one end of the first member 1, and annular valve bodies 13 and 14 are slidably mounted on the surface of the sliding shaft 18 with a spring 17 interposed therebetween. . The movable range of the valve bodies 13 and 14 is determined by the steps 15 and 16 at both left and right ends.
Regulated by

When the switching handle 40 is operated to rotate the spindle 11 via the double serration ring 41 and the spindle 11 is screwed (moved to the right in the drawing) with respect to the spindle case 12, the left valve 13 is turned on. The spindle 11 is moved by being pushed by the left step 15 to open the inflow port 51 to the faucet 20 side. Thereby, hot water is supplied from the primary flow path 50 to the faucet 20.

When the switching handle 40 is rotated in the opposite direction and the spindle 11 is retracted (moves to the left in the drawing) with respect to the spindle case 12, the right valve 1
4 is pushed by the right step 16 of the spindle 11 and moves,
The inflow port 52 to the shower delivery section 30 side is opened. Thereby, hot water is supplied from the primary flow path 50 to the shower head.

[0006]

The above-mentioned conventional switching valve has the following problems. The sliding shaft 18 to which the valve bodies 13 and 14 are mounted is made of brass in terms of manufacturing accuracy, strength, durability and the like. And
When the valve bodies 13 and 14 slide on the surface, metal powder is generated, which causes a hindrance to smooth sliding of the valve bodies 13 and 14. In some cases, the valve bodies 13 and 14 are
8 sticks and causes poor water stoppage.

The sliding shaft 1 is provided on the inner peripheral surfaces of the valve bodies 13 and 14.
An O-ring 19 is fitted to secure watertightness between the O-rings 8 and 8. If the O-ring is a vulcanized rubber, the sulfur component and the metal powder may react with each other, leading to corrosion.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to improve the switching valve in view of the above-mentioned conventional problems. Briefly describing the features of the present invention, two valve bodies slidably mounted at appropriate intervals on the surface of a spindle or a sliding shaft provided coaxially with the spindle, and these are mounted. A resin sleeve is interposed between the spindle and the sliding shaft.

[0009]

With the resin sleeve interposed between the valve body and the spindle or the sliding shaft, the valve body does not come into direct contact with the spindle or the sliding shaft. The accompanying generation of metal powder can be prevented.

[0010]

FIG. 1 shows an embodiment of a switching valve A according to the present invention. The basic configuration of the switching valve A is common to the conventional example,
The components are described in order. 1 is a spindle, 2 is a spindle case, 3 and 4 are left and right valve bodies, 5 and 6 are left and right valve body pressers, 7 is a spring, and 8 is an E-ring.

The difference of the present invention from the conventional one is that it is a feature of the present invention. A resin sleeve 10 is interposed between the spindle 1 and two annular valve bodies 3 and 4 mounted on the spindle 1. The valve bodies 3 and 4 are configured to slide on the resin sleeve 10 in a watertight manner. With this configuration, when the switching handle 40 (see FIG. 2) is operated to screw the spindle 1 (moving to the right in the drawing), the left valve disc holder 5 moves the resin sleeve 10 together with the valve disc 3 in the right direction. To move the valve body 3 away from the spindle case 2 fixed to the faucet, and the faucet 20 (see FIG. 2)
The flow path to the side. Conversely, when the spindle 1 is screwed back (moved to the left in the drawing), the valve body 4 and the resin sleeve 10 are moved to the left by the right valve body retainer 6, and the flow toward the shower side is caused. The road is opened.

As described above, according to the present invention, the valve bodies 3 and 4 do not come into direct contact with the metal spindle 1.
There is no possibility that metal powder is generated by repeated sliding as in the related art. It is desirable that the resin sleeve 10 be made of, for example, polyacetal resin (POM) having self-lubricating properties.

In this embodiment, a regulating ring 9 is provided between the valve bodies 3 and 4. The restricting ring 9 is for restricting the axial movement range (stroke) of the spindle 1 by operating the handle. Therefore, if necessary, the restricting ring 9 is changed to one having a different thickness.

The above description is only one embodiment of the present invention, and does not prevent an appropriate change according to the situation.

[0015]

According to the present invention, in a switching valve such as a shower / bath faucet, a resin sleeve is interposed between a valve body and a spindle or a sliding shaft on which the valve body is mounted so that both are not in direct contact with each other. As a result, the generation of metal powder is prevented, and accordingly, there is no risk of causing poor sliding or sticking of the valve element. Also,
Since the generation of rust and corrosion of the spindle and the sliding shaft are suppressed, the life of the product is prolonged.

[Brief description of the drawings]

FIG. 1 is a half sectional side view showing an example of a switching valve according to the present invention.

FIG. 2 is a partial sectional side view showing a conventional shower / bath faucet.

FIG. 3 is a half sectional side view showing a conventional switching valve.

[Explanation of symbols]

 A switching valve 1 spindle 2 spindle case 3 valve body 4 valve body 5 valve body holding 6 valve body holding 7 spring 10 resin sleeve

Claims (1)

(57) [Claims] 1. Two spindles or two valve bodies that are respectively installed at locations where two outflow ports are provided for one primary side flow path and that respectively close the two outflow ports are provided coaxially with the spindle. Slidably mounted on the surface of the sliding shaft at appropriate intervals, and by rotating the spindle to selectively move one of the valve bodies to open one of the two outflow ports. A switching valve, wherein a resin sleeve is interposed between the two valve bodies and the spindle or sliding shaft on which the two valve bodies are mounted.