JPH09210220A - Stop piece for feed water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stop piece for feed water suppressing wearing of a valve unit, lightening weight of a handle, also facilitating assembly and replacement, and reducing a cost. SOLUTION: A plate material 4d or a layer consisting of a fluororesin with a small friction coefficient is provided in a surface in an opposite side to a valve unit 4c in a flange 4b of a stop piece 4. Accordingly, rotational resistance of a handle is decreased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water stop piece for water supply used for water supply.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a general water tap. In FIG. 3, a valve box 1 through which water W flows is formed in the body of the water tap. A spindle 2 having a male screw 2a formed therein is screwed into the valve box 1 from above. A handle 3 is fixed to the upper end of the spindle 2, and a guide hole 2b is coaxially formed in the spindle 2. The valve shaft 4a of the water blocking piece 4 is slidably inserted into the guide hole 2b. The water stopping piece 4 is the valve shaft 4a.
The flange 4b protruding in the radial direction and the valve body 4c made of rubber provided on the back surface of the flange 4b. The valve body 4c
Faces the valve seat 1a formed in the valve box 1. In addition,
5 is a valve lid and 6 is a seal packing.

Next, the operation of the water tap will be described. In the open state shown in the figure, the water blocking piece 4 is lifted upward by the water pressure of the water W, and the water W flows in the water tap. On the other hand, by rotating the handle 3 in the closing direction, the spindle 2 descends, and eventually the lower end surface 2c of the spindle 2 pushes the upper surface 4d of the collar 4b, so that the valve body 4c is seated on the valve seat 1a and stopped. To be watered.

[0004]

However, in the above-mentioned water tap, since the spindle 2 and the collar 4b are made of metal and the collar 4b is made of soft metal, the contact surfaces of both of them are not formed. Since the friction is large, the collar 4b also rotates as the spindle 2 rotates just before the water is stopped. Therefore, since the valve body 4c rotates and comes into pressure contact with the valve seat 1a, the rubber valve body 4c is worn. Therefore, the water blocking piece 4 is frequently replaced. Further, since the friction between the spindle 2 and the collar 4b is large, there is a problem that the operating force of the handle 3 is large.

Therefore, as shown in FIG. 4, the spindle 2
A water faucet for solving such a problem is also proposed by inserting a steel ball 7 into the guide hole 2b of the above and bringing the spindle 2 and the water stopping piece 4 into rolling contact with each other (actually, in Japanese Utility Model Application Laid-Open No. 57-4).
2260 publication). However, in this prior art, the steel ball 7 may be corroded. Further, since the water blocking piece 4 is pushed downward via the steel ball 7, there is a risk that the valve body 4c will be partially hit against the valve seat 1a. In addition, the steel ball 7
Need to be careful not to drop it, and the assembly becomes troublesome. Moreover, since the steel ball 7 is unavoidably dropped when the water blocking piece 4 is replaced, it cannot be replaced in fact and has not been used yet.

On the other hand, as a valve for water distribution, a valve in which the steel balls are prevented from falling and a valve in which a ball bearing made up of a large number of steel balls are provided have been proposed (actual exploitation 57).
-194957). But these valves
Since the structure is complicated, the valve becomes large and the cost increases. Therefore, it is not used for water supply, but only for water distribution. In addition, it cannot be applied to existing faucets.

It is an object of the present invention to provide a water stopping piece for water supply which solves the above conventional problems.

[0008]

In order to achieve the above object, a water stopping piece for water supply according to the present invention comprises a plate material or a layer made of a fluororesin on the surface of the brim of the water stopping piece opposite to the valve body. Is provided.

According to the present invention, since the lower end surface of the spindle comes into contact with the plate material or layer made of fluororesin having a small friction coefficient, there is no possibility that the water blocking piece will rotate even if the spindle is rotated.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment. In this figure, an annular thin plate member 4 made of fluororesin is formed on the surface of the collar 4b of the water blocking piece 4 opposite to the valve body 4c.
d is attached by an adhesive. This water stop piece 4
It is used by being attached to the water tap of FIG. As the fluororesin, in addition to polytetrafluoroethylene known under the trade name of Teflon (registered trademark), polychlorotrifluoroethylene and the like can be used. Also, the plate material 4d
Instead of sticking, the plate member 4d may be adhered, or the plate member 4d may be simply inserted into the valve shaft 4a. Further, instead of the plate material 4d made of fluororesin, the collar 4b is used.
A fluororesin coating (layer) may be provided on the surface.

FIG. 2 shows a second embodiment. In this embodiment, the valve shaft 4a and the collar 4b are provided separately from each other, and the valve shaft 4a and the collar 4b are integrally molded with the valve body 4c. A plate member 4d made of fluororesin is attached to the collar 4b via an adhesive 4e.

[0012]

According to the present invention, since the lower end surface of the spindle comes into contact with the plate material or layer made of fluororesin having a small friction coefficient, there is no possibility that the water blocking piece will rotate even if the spindle is rotated. Therefore, since the valve body does not rotate when it is seated on the valve seat, wear of the valve body can be suppressed and durability is improved. Further, since the lower end surface of the spindle comes into contact with the plate material or the layer made of fluororesin, the rotation resistance of the spindle becomes small, and the handle becomes light.

In particular, in the present invention, unlike the case of using steel balls, there is no risk of corroding the plate material or layer, and there is also no risk of the valve body making a one-sided contact, so there is no deterioration in the water stopping performance. . Further, since the plate material or the layer is provided on the surface of the collar opposite to the valve body, there is no possibility that the plate material or the like will drop at the time of assembly or replacement of the water blocking piece, so that the assembly or replacement is facilitated. Further, the water blocking piece of the present invention is simply added with a simple structure of providing a plate material or a layer made of fluororesin, so unlike a ball bearing or the like, it is small and inexpensive and suitable for a water faucet. It can be used by replacing the existing water stop with a water stop piece.

[Brief description of drawings]

FIG. 1 is a perspective view of a water blocking piece showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a water blocking piece showing a second embodiment.

FIG. 3 is a cross-sectional view of a general water faucet.

FIG. 4 is a cross-sectional view of a conventional water tap.

[Explanation of symbols]

 4: Water stop piece 4a: Valve shaft 4b: Collar 4c: Valve body 4d: Plate material

Claims (1)

[Claims] 1. A water shutoff piece for water supply, comprising a valve shaft, a flange projecting radially from the valve shaft, and a rubber valve element provided on the back surface of the flange, wherein the valve in the flange is provided. A water blocking piece for water supply, characterized in that a plate material or layer made of fluororesin is provided on the surface opposite to the body.