JP2522848Y2 - Water faucet with ceramic disc 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 faucet having a ceramic disc valve, and more particularly to a faucet using a ceramic disc valve which is improved to prevent water leakage from a sliding surface.

[0002]

2. Description of the Related Art A faucet provided with a ceramic disk valve is widely used as a faucet for controlling a flow rate or switching a flow path. FIGS. 4 and 5 (FIG. 4) show an example of this type of faucet.
The single-lever hot / water mixing faucet and the ceramic disc valve used therein will be described with reference to FIG.

In FIGS. 4 and 5, a lever handle 10 is shown.
Has a boss 12 at its proximal end, which is
Is connected to the upper end of the spindle 16 mounted on the upper part of the spindle. Reference numeral 17 denotes a screw for fixing the lever handle 10 to the spindle 16. The spindle 16 is rotatable in a vertical plane by a horizontal pin
Attached to. The rotating frame 20 is mounted on the upper surface of the housing 14 so as to be horizontally rotatable. The spindle 16 is rotatable around the horizontal pin 18 within a range where the flange 16a of the spindle 16 hits the rotating frame 20.

[0004] At the lower end of the spindle 16, a spherical connecting projection 22 is projected, and this connecting projection 22 is fitted into a receiving hole 26 of a ceramic disk valve 24. The valve body 24 is linearly moved (slid) in the front-rear direction on the ceramic disk valve 30 by the swing of the spindle 16 accompanying the operation of the lever 10 in the vertical direction, and the water supply amount is adjusted.

A rotating body 20 to which a horizontal pin 18 serving as a support shaft of the spindle 16 is attached is held on the upper surface of the housing 14 so as to be rotatable in a horizontal plane. The spindle 16 is rotated by this rotation, the rotational force is transmitted to the frame 20, and the ceramic disc valve 24 is rotated left and right to adjust the hot water flow and the cold water flow to adjust the hot water temperature. Note that the axis of the connecting projection 22 is displaced from the axis of the spindle 16, and when the spindle 16 is rotated by the lever handle 10, the connecting projection 22 becomes equiradial around the axis of the spindle 16 as the rotation center. The valve body 24 is rotated right and left.

A concave portion 28 is formed on the lower surface of the ceramic disk valve 24, and the lower surface is a sliding surface on which the ceramic disk valve 30 slides.

The ceramic disk valve 30 is mounted on the housing 1
4, a hole 32 for mixed water outflow, an inflow hole 34 for water and an inflow hole 36 for hot water are provided in the thickness direction thereof. The above-mentioned flow rate adjustment and hot water temperature adjustment can be performed by changing the opening area where the holes 32, 34, 36 and the recess 28 overlap.

The housing 14 is in the form of a cylinder with a closed bottom and no bottom, and is fixed to a case 39 by long bolts 37. A bottom cover 38 is fitted to the bottom of the housing 14. The bottom cover 38 is provided with an opening 40 and the like at a position corresponding to the hole 32 and the like. The opening 40 and the like communicate with a water faucet pipe 44 of a faucet, a water leg pipe and a hot water leg pipe (not shown) 46 via an opening 42 and the like of a support portion provided in the case 39. The housing 14 and the bottom lid 38 constitute a faucet shell.

Reference numeral 47 denotes a sliding plate made of a highly slidable synthetic resin interposed between the upper surface of the ceramic disk valve 24 and the rotary frame 20.

[0010]

In the faucet having a ceramic disk valve as described above, it is necessary to prevent water from leaking from the sliding surfaces of the ceramic disk valves 24 and 30. For this reason, conventionally, a long bolt 37 is tightly tightened to strongly press the sliding surfaces of the ceramic disk valves 24 and 30 against each other.

However, when the ceramic disk valves 24 and 30 are strongly pressed against each other, the slidability of the ceramic disk valves 24 and 30 is deteriorated, and a phenomenon that the handle is heavy is caused.

Further, particularly when the water discharge pipe 44 is provided with a water stop valve (for example, an electromagnetic valve), a high water hammer pressure (water hammer) is applied when the water stop valve is closed. The sliding surfaces of the valves 24 and 30 may be impulsively loaded on the sliding surfaces and cause water leakage from the sliding surfaces.

[0013]

SUMMARY OF THE INVENTION A faucet according to the present invention is a faucet comprising a pair of slidably superimposed ceramic disc valves installed in a faucet shell body. A back pressure chamber for pressing the one ceramic disk valve against the other ceramic disk valve is provided on a side opposite to the one sliding surface, and a water conduit is provided for communicating the back pressure chamber with a water channel of a faucet. It is characterized by having.

[0014]

In the water faucet having the ceramic disk valve of the present invention, when a water pressure (water supply pressure or water hammer pressure, etc.) is applied to the flow path in the ceramic disk valve, the water pressure is applied to the back pressure chamber via the water conduit. And pressure is applied in the direction in which the ceramic disk valves come into close contact with each other. For this reason, even if a large water pressure is applied, the sealing pressure between the ceramic disk valves increases accordingly, and water leakage is reliably prevented.

Further, in the water faucet having the ceramic disk valve of the present invention, the urging force such as the bolt fastening force for constantly pressing the ceramic disk valves in the contact direction can be small, so that the ceramic disk valve can be operated lightly. Can lighten the handle.

[0016]

FIG. 1 is a sectional view of a water faucet having a ceramic disk valve according to an embodiment of the present invention.

In this embodiment, a head cap 50 made of a highly slidable synthetic resin is mounted on the upper side of the ceramic disk valve 24, and a back pressure chamber 52 is formed on the upper surface side of the ceramic disk valve 24. In this embodiment, a step is formed at the outer peripheral edge of the upper surface of the ceramic disk valve 24, and the lower end of the head cap 50 having a bottomless cover is engaged with the step. The back pressure chamber 52 is filled with the ceramic disc valve 2.
In order to communicate with the fourth flow path (recess 28), a water conduit 54 formed of a through hole is formed in the ceramic disk valve 24. In the back pressure chamber 52, a ring-shaped rubber packing (U packing in this embodiment) 56 for sealing is provided.

A projection 58 is formed on the upper surface of the head cap 50.
The spherical connection projection 22 at the lower end of the spindle 16 is fitted in a receiving hole 26 ′ formed in the projection.

In this embodiment, stoppers 20a and 20b are provided on a rotary frame 20 mounted on the upper surface of the housing 14 so as to be horizontally rotatable, for restricting the rotation range of the spindle 16 around the horizontal pin 18. The spindle 16 is rotatable in a range between the stopper portions 20a and 20b. However, as in the conventional example shown in FIGS. 4 and 5, it is apparent that a flange-shaped portion may be provided on the spindle 16 so that the spindle 16 can rotate within a range where the flange-shaped portion hits the rotary frame 20. It is.

Other configurations are the same as those shown in FIGS.
The same or corresponding parts are indicated by the same reference numerals.

In the water faucet having the ceramic disk valve of the present embodiment configured as described above, when a water pressure (water supply pressure, water hammer pressure, etc.) is applied to the flow path (recess 28) in the ceramic disk valve 24. This water pressure is transmitted to the back pressure chamber 52 through the water channel 54, and the ceramic disc valve 2
A downward pressure is applied to the ceramic disk valve 24 in a direction in which the four and thirty members come into close contact with each other. For this reason, even if a large water pressure is applied, the ceramic disc valve
The sealing pressure between the 4,30 members is increased, and water leakage is reliably prevented. When the water pressure increases, the lip of the U packing 56 opens, and the sealing performance is improved.

Further, since the urging force such as the fastening force of the bolt 37 for always pressing the ceramic disk valves 24 and 30 in the close contact direction can be small, the ceramic disk valve 24 is not required.
Can be operated lightly, and the handle becomes lighter.

In the present embodiment, when the packing 56 is soft or particularly a soft porous body having closed cells, the water hammer pressure is absorbed by the packing 56,
Water hammer prevention effect is exhibited.

In the above embodiment, the packing 5 is provided in the back pressure chamber 52.
6 are arranged, but in the present invention, a packing such as an O-ring 59 may be provided at another appropriate place (for example, a contact surface between the head cap 50 and the ceramic disk valve 24 as shown in FIG. 2).

In the present invention, as shown in FIG. 3, a valve mechanism 60 such as an electromagnetic valve is provided in a water discharge passage such as a water discharge pipe 44, and a water hammer pressure is generated when the valve mechanism 60 is rapidly closed. It is suitable to be applied to a faucet.

[0026]

As described above, according to the water faucet having the ceramic disk valve of the present invention, the water pressure which urges the ceramic disk valves in the direction in which the ceramic disk valves come into close contact can be applied to the ceramic disk valves. The water sealing of the sliding surface is very good.

Further, the tightening force of a long bolt or the like for pressing the ceramic disc valves in the close contact direction can be reduced, the sliding resistance of the ceramic disc valve is small, and the operation of the handle of the faucet becomes light. Further, it is possible to prevent the material fatigue of the faucet shell, to reduce the required strength, and to simplify the assembling, thereby improving the durability and reducing the production cost.

[Brief description of the drawings]

FIG. 1 is a sectional view of a faucet having a ceramic disk valve according to an embodiment.

FIG. 2 is a cross-sectional view of a faucet having a ceramic disk valve according to the embodiment.

FIG. 3 is a side view of the faucet.

FIG. 4 is a sectional view of a single-lever hot and cold water mixing faucet;

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

FIG. 6 is a plan view of a conventional ceramic disk valve.

[Explanation of symbols]

 Reference Signs List 10 lever handle 16 spindle 24 ceramic disc valve 30 ceramic disc valve 50 head cap 52 back pressure chamber 54 water conduit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kentaro Masuoka 3-6, Koie Honcho, Tokoname-shi, Aichi Prefecture Inside Inax Corporation (72) Takashi Kojima Inventor 3--6, Koie Honcho, Tokoname, Aichi Prefecture Inside Inax Inc. In-company (56) References JP-A-2-256973 (JP, A)

Claims (1)

(57) [Scope of request for utility model registration] 1. A faucet comprising a pair of slidably superimposed ceramic disc valves disposed in a faucet shell, wherein said ceramic disc valve is provided with a pair of ceramic disc valves on a side opposite to at least one sliding surface. A faucet, comprising: a back pressure chamber for pressing one ceramic disc valve against the other ceramic disc valve; and a water conduit connecting the back pressure chamber to a water channel of the faucet.