JP2000227167A - Mixing faucet and packing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase sealability, prevent detect in cutoff of water, and reduce operation torque, by comprising a packing guide having wedge projections and a packing so that the wedge projections are formed valve openings for hot water/cold water and a valve opening for mixed water. SOLUTION: Whole valve openings 3a, 3b for hot water and water get pressure when feed hot water/cold water pressure is applied. Packing 8 has wedge recesses 6a to enable to prevent force of drawing the packing 8 on a side of a valve opening 3c for mixed water. That is, tips of wedge projections 6a of a packing guide 6 are disposed inside an inner diameter of the packing 8 to receive pressure P applied to the packing 8, resulting in preventing the force of drawing the packing 8 on the side of the valve opening 3c for the mixed water from a side of the valve openings 3a, 3b for the hot water and the cold water. Accordingly, shortage of interference is eliminated to enable to restrain defect in cutoff of the water. The packing guide 6 can tightly fix the packing 8 to enable to reduce the interference thereby to reduce operation torque.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot and cold water mixing faucet and a packing, and more particularly to a single lever type hot and cold water mixing faucet and a member for sealing a valve hole for hot water, water and mixed water used therein. The packing connected to the

[0002]

2. Description of the Related Art A hot-water mixing faucet which is closed and opened by rotating a single lever up and down and left and right has become widespread. Fig. 6 shows a hot-water mixing faucet used for domestic water supply.
This will be described below. Fig. 6 shows the structure of a cartridge for a three-hole type hot and cold water mixing faucet consisting mainly of eight parts.
6B is a cross-sectional view as viewed from the front, and FIG. 6B is a cross-sectional view as viewed from the side. The hot and cold water mixing faucet 1 includes a housing 2
A fixed valve body 3 and a movable valve body 4 are provided therein, and the movable valve body 4 is freely slid by an engaging handle lever 5.
The fixed valve body 3 has a valve hole 3a for hot water, a valve hole 3b for water, and a valve hole 3c for mixed water.
And hot water are mixed in the mixing chamber 4a, and discharged through a faucet from the mixed water valve hole 3c. A packing guide 6 ′ is provided on the back surface of the sliding contact surface of the fixed valve element 3, and a packing 8 ′ is fitted to the packing guide 6 ′ and sealed with a bottom plate 7. Reference numeral 9 denotes a lever holder, 10 denotes a block member, and 11 denotes a packing provided below the bottom plate 7.

On the other hand, as a type of hot-water mixing faucet, a two-hole type having only a valve hole for hot water and a valve hole for water in a fixed valve body and a valve hole for mixed water on a side surface of the faucet. There is a hot and cold water mixing faucet. In this case, the sealing between the fixed valve body and the bottom plate is performed by packing with two holes, but compared with the three-hole type, the sealing material between the fixed valve body and the bottom plate and the sealing material between the movable valve body and the housing are compared. Since the dimensional control requires higher precision, the limit withstand voltage is not improved and the manufacturing cost is increased. For this reason, it is necessary to make the thickness of the packing of the two-hole packing more uniform than that of the three-hole packing, and a straight line portion that separates the valve hole for hot water and the valve hole for water is used. It is necessary to prevent the deformation of the packing caused by the provision. For this reason, there is known a two-hole packing in which the intersection between the straight portion and the circumferential portion is formed in a substantially V shape (Japanese Patent Application Laid-Open No. 10-132092).

[0004]

However, when a three-hole packing 8 'having a planar shape shown in FIG. 7 is fitted to the packing guide 6', a valve hole for hot water, a valve hole for water, and mixed water are provided. The following problems occur when hot water pressure and water pressure are applied because the valve holes are provided adjacent to each other. FIG.
Is a conventional three-hole packing 8 in the packing guide 6 '.
FIG. 8 is a plan view showing a state in which ´ is fitted and pressure is applied, and FIG. 8 is an enlarged view of a portion C in FIG. The packing 8 ′
When hot water pressure and water pressure are applied from the hot-water valve hole 3a and the hot-water valve hole 3b, the hot-water valve hole 3a and the hot-water valve hole 3b
Although pressure is applied to the entire interior, the pressure applied to the portions D ₁ and D ₂ has a great influence on the packing 8 ′. As shown in FIG. 8, when the hot water pressure and the water pressure are applied, a force P 'is generated on the packing 8' to be brought to the mixed water valve hole 3c side as indicated by a broken line. The other part of the packing 8 ′ that has received the pressure can contact the packing guide 6 ′ to maintain the packing shape, whereas the parts D ₁ and D ₂ receive the force when receiving the pressure and are received by the packing guide 6 ′. Probably because there is no. If the force brought to the mixed water valve hole 3c side is large, the packing of the hot water valve hole 3a and the water valve hole 3b is elongated, and the prescribed interference is insufficient, and the hot and cold water mixing faucet has poor water stoppage. There is a problem that causes.

In order to prevent the packing 8 'of the conventional product from being taken in, the packing hardness has been increased or the interference has been increased. However, in this case, the operation torque of the cartridge becomes large,
There is a problem that an unpleasant feeling is received during operation.

The present invention has been made to address such a problem. By changing the shape of the packing and the packing guide, the deformation of the packing due to hot water and water pressure is prevented, the sealing property is improved, and the stop is improved. Prevention of poor water,
An object of the present invention is to provide a hot and cold water mixing faucet capable of reducing operation torque and a packing used therein.

[0007]

The hot and cold water mixing faucet of the present invention is provided at the bottom of the housing, and has a valve hole for hot water and water which is respectively connected to the inflow side of the hot water and the water, and a discharge side of the mixed water. A fixed valve body provided with a valve hole for mixed water communicated with the fixed valve body, a movable valve body having a mixing chamber on a sliding surface with the fixed valve body, and a movable valve body. A hot-water mixing faucet that opens and closes a valve hole on a hot water inflow side and a water inflow side of a fixed valve body by operating a handle lever to be engaged, wherein the fixed valve body is located between the valve holes and inside the valve hole. A packing guide formed having a wedge-shaped projection having a tip, and a packing having a shape fitted to the packing guide,
The wedge-shaped projection is formed between a valve hole for hot water and water and a valve hole for mixed water.

The wedge-shaped projection is provided between a valve hole for hot water and a valve hole for water.

Further, the tip of the wedge-shaped projection is protruded to at least half the width of the packing guide.

The packing of the present invention is a packing used for the hot and cold water mixing faucet, and is characterized in that its cross section is substantially H-shaped.

[0011] Further, the present invention is characterized in that the packing has a convex portion on the inner diameter side surface for preventing falling.

[0012] The present invention provides a three-hole hot / cold water mixing faucet having a wedge-shaped projection having a tip inside a valve hole between a valve hole for hot water and water and a valve hole for mixed water. By providing a packing guide to be formed and a packing fitted to the packing guide on the back surface of the fixed valve body, deformation of the packing due to hot water and water pressure from a hot water and a water valve hole is prevented, and sealing is performed. Performance can be improved. as a result,
It is possible to prevent poor water stopping and reduce operation torque. Further, by setting the cross-sectional shape of the packing to be substantially H-shaped, the water stopping performance can be further improved even when the interference is small.

[0013]

FIG. 1 shows a packing according to the present invention.
FIG. 1A is a plan view of a three-hole packing, and FIG.
-A sectional drawing is shown, respectively. The packing 8 has a substantially circular outer ring portion 8a and a semicircular inner ring portion 8b as viewed from the plan view shown in FIG. 1, and the outer ring portion 8a and the inner ring portion 8b are linear portions 8c each having an angle of about 60 degrees with each other. Are connected to define valve holes 3a and 3b for hot and cold water and a valve hole 3c for mixed water. Further, a straight portion 8c and an outer ring portion 8a that define valve holes 3a and 3b for hot water and water and a valve hole 3c for mixed water.
Is provided with a wedge-shaped constriction 8d at the intersection with. The cross section of the outer ring portion 8a, the semicircular inner ring portion 8b, and the straight portion 8c has an H-shape having projections 8e at both ends with respect to the sealing surface.

FIGS. 2 and 3 show a state in which the packing 8 of the present invention is used by being fitted to the packing guide 6 on the back surface of the fixed valve body 3. FIG. 2 is a plan view showing a used state in which pressure is applied, and FIG. 3 is an enlarged plan view of a portion B in FIG. The packing guide 6 has a wedge-shaped projection 6a having a tip inside the valve hole at the boundary between the valve holes 3a and 3b for hot and cold water and the valve hole 3c for mixed water so that the packing 8 can be fitted.
Is formed. Further, the tip of the wedge-shaped projection 6a has a width 1
Protrudes beyond / 2.

When hot water and water supply pressure are received, pressure is applied to the entire valve holes 3a and 3b for hot water and water. However, the packing 8 of the present invention is provided with a wedge-shaped constriction 6a. Can be prevented from drawing the packing toward the valve hole 3c. That is, since the tip of the wedge-shaped projection 6a of the packing guide enters the inside of the packing inner diameter and receives the pressure P applied to the packing, the valve hole 3 for hot and cold water is used.
No force is generated from a and 3b toward the mixed water valve hole 3c. For this reason, the tightness of the packing 8 is not short, and poor water stoppage can be suppressed. Further, since the packing can be firmly fixed by the packing guide, the hardness of the packing material can be suppressed low, and the tightening margin can be reduced, so that the operating torque can be reduced.

Another example of the present invention is shown in FIGS. 4 and 5. 4 and 5 are plan views of other examples. FIG. 4 shows an example in which a wedge-shaped constriction 8f is provided at an intersection of a straight portion 8c and an outer ring portion 8a that define a valve hole 3a for hot water and a valve hole 3b for water. In this packing, wedge-shaped projections 6b prevent the force for bringing in the packing even when one of the valve holes 3a for hot water and the valve hole 3b for water are closed. Can be.

FIG. 5 shows a projection 8 on the inner diameter of the packing so that the packing 8 does not drop from the packing guide during mounting.
It is an example of packing provided with g. The size of the projection 8g is preferably provided to such an extent that the projection 8g enters the packing groove with a light pressure.

The hot and cold water mixing faucet of the present invention comprises a conventional packing 8 'provided in a packing 8 provided with a wedge-shaped constriction, between a valve hole for hot water and water and a valve hole for mixed water, or 6 can be assembled in the same manner as the hot and cold water mixing faucet cartridge 1 shown in FIG. 6 except that a packing guide 6 having a wedge-shaped projection is provided between the valve hole for water and the valve hole for water.

[0019]

EXAMPLE A conventional product and an invention product were incorporated in the above-mentioned hot and cold water mixing faucet, and the limit pressure resistance of the water supply pressure was measured. The measuring method is a method of reading the pressure gauges respectively attached to the hot water supply port and the water water supply port. The measurement was performed at n = 10. Table 1 shows the measurement results.

[Table 1]

As shown in Table 1, the present embodiment has a limit withstand voltage of about 1.5 times that of the comparative example, so that the sealing performance is improved and the water stoppage failure can be prevented.

[0021]

The hot and cold water mixing faucet of the present invention has a wedge-shaped projection having a tip inside the valve hole between the valve hole for hot water and water and the valve hole for mixed water on the back surface of the fixed valve body. Since it is provided with a packing guide formed and a packing fitted to the packing guide, it is possible to prevent the force of bringing the packing into the valve hole for mixed water. As a result, it is possible to prevent poor water stoppage from this portion, secure a stable interference, and increase the limit withstand pressure. Also,
The operating torque of the handle lever does not increase.

Further, since the wedge-shaped projection is provided between the valve hole for hot water and the valve hole for water, the packing can be performed even when one of the valve hole for hot water or the valve hole for water is closed, that is, at a so-called one-side pressure resistance. Can be prevented, and poor water stoppage can be suppressed.

Further, since the tip of the wedge-shaped projection projects more than 1/2 of the width of the packing guide, the force of bringing the packing into the valve hole for mixed water can be more reliably prevented.

Since the packing of the present invention has a substantially H-shaped cross section, the sealing property of the hot and cold water mixing faucet is further improved.

Further, since the packing has a convex portion on the inner diameter side surface for preventing falling, workability at the time of assembling the hot and cold water mixing faucet is improved.

[Brief description of the drawings]

FIG. 1 is a plan view and a cross-sectional view taken along line AA of a packing of the present invention.

FIG. 2 is a diagram showing a state where the packing guide is used while being fitted to the packing guide.

FIG. 3 is an enlarged plan view of a portion B in FIG. 2;

FIG. 4 is a plan view showing another example of packing and an example of use thereof.

FIG. 5 is a plan view showing another packing example.

FIG. 6 is a view showing a hot and cold water mixing faucet cartridge.

FIG. 7 is a plan view showing an example of a conventional packing and an example of a usage state thereof.

8 is an enlarged plan view of a portion C in FIG. 7;

[Explanation of symbols]

 Reference Signs List 1 Cartridge for hot and cold water mixing faucet 2 Housing 3 Fixed valve body 3a Valve hole for hot water 3b Valve hole for water 3c Valve hole for mixed water 4 Movable valve body 5 Handle lever 6 Packing guide 7 Bottom plate 8 Packing 9 Lever holder 10 Block member 11 Bottom plate lower packing

Claims (5)

[Claims] 1. A valve hole for hot water and water, which is provided at an inner bottom portion of a housing and communicates with a hot water and an inflow side of water, respectively, and a valve hole for mixed water which communicates with a discharge side of the mixed water. , A movable valve body having a mixing chamber on a sliding surface with the fixed valve body, and the fixed valve body is operated by operating a handle lever engaged with the movable valve body. A hot / water mixing faucet for opening and closing the valve holes on the hot water inflow side and the water inflow side, wherein the fixed valve body has a wedge-shaped projection located between the valve holes and having a tip inside the valve hole. The wedge-shaped protrusion is formed between the valve hole for the hot water and the water and the valve hole for the mixed water. A hot and cold mixing faucet characterized by the following. 2. The hot and cold water mixing faucet according to claim 1, wherein the wedge-shaped projection is provided between the valve hole for hot water and the valve hole for water. 3. The hot and cold water mixing faucet according to claim 2, wherein a tip of the wedge-shaped projection projects to a half or more of a width of the packing guide. 4. A packing used for the hot and cold water mixing faucet according to claim 1, wherein the packing has a substantially H-shaped cross section. 5. The packing according to claim 4, wherein the packing has a convex portion on a side surface of an inner diameter for preventing the packing from dropping.