JP2713078B2 - Low tank water spouting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water discharge device for a low tank for supplying flush water to a toilet, and more particularly to a device for adjusting the amount of water remaining in a low tank. More specifically, the present invention relates to a low tank water discharge device suitable for application to a siphon type Western style toilet.

[0002]

2. Description of the Related Art As is well known,
The float valve 2 is provided, and when the float valve 2 is pulled up by operating a lever handle, a switch, or the like, water in the low tank flows out toward the toilet. FIG. 8 is a longitudinal sectional view of such a float valve device. The valve seat 1 is attached to the washing water outlet of the bottom wall 6 of the low tank, and the float valve 2 is seated on the valve seat 1. 2a is a guide rod connected to the float valve 2. An overflow pipe 3 is attached to the valve seat 1, and a stopper (float stop) for the float valve 2 is provided in the middle of the overflow pipe 3.
4 is attached. The float valve 2 has a hollow inside so that it can float above the water surface.

In the state shown in the figure, the float valve 2 is operated by water pressure.
Is pressed against the valve seat 1 and is in a water stoppage (water storage) state. Reference numeral 6 denotes a bottom wall of the low tank. When the float valve 2 is pulled up via the chain 5, the float valve 2 is released from the water pressure and floats until it comes into contact with the stopper 4. In this state, the washing water flows out of the valve seat 1.

When the water level in the low tank falls below the stopper 4, the float valve 2 is eventually moved to the stopper 4.
And descends with the falling water level while floating on the water surface. When the water level reaches L in FIG. 8, the float valve 2 is forcibly seated on the valve seat 1 by being drawn into the discharged water flow passing through the valve seat 1. Once the float valve 2 is seated, the float valve 2 is pressed against the valve seat 1 by the water pressure from above, and the water is stopped.

[0005] Therefore, water below L in Fig. 8 is residual water (commonly referred to as dead water) which is not discharged from the low tank.

As described above, in the conventional float valve device, since the buoyancy of the float valve 2 is constant, the water level L is constant and the amount of residual water is also constant. There was a problem that it was not possible.

In order to solve such a problem, the present applicant disclosed in Japanese Patent Application No. Hei 3-22567 (hereinafter referred to as the prior application) (see Japanese Patent Application Laid-Open No. 5-65730) the residual water in a low tank. A water discharge device that can be reduced was proposed.

FIG. 7 is a longitudinal sectional view showing the low tank water discharging device of the prior application when the inside of the low tank is full.

In the water discharge device for a low tank, a container 7 having a bottomless lid is disposed so as to cover the float valve 2. The container 7 is a bottomless cylindrical shape having a larger diameter than the float valve 2, and is fixed to the overflow pipe 3. An opening 8 is provided on the upper surface of the container 7 at a position offset from the center of the float valve 2, and a valve 9 is inserted into the opening 8. The valve element 9 has flanges 9a and 9b at the upper and lower portions, respectively, and a packing 9c is attached to the lower surface of the upper flange 9a. Since the valve body 9 is provided with the packing 9c, the sealing property when closing the opening 8 is good. The lower end of the valve body 9 and the float valve 2
Are connected by a chain 5a, and the upper end of the valve body 9 is connected to a lever handle (not shown) of the low tank by a chain 5b.

Since the valve body 9 is provided with a flange 9b, the chain 5 is operated by operating a lever handle of the low tank.
Even if b is pulled strongly, the flange 9b abuts on the ceiling surface of the container 7, and the chains 5b and 5a are not further lifted.

The reason why the center of the valve body 9 is shifted from the center of the float valve 2 is to prevent the chain 5a from tangling and forming a block.

In the container 7, a stopper 4A for preventing the float valve 2 from floating is provided. The stopper 4 </ b> A is a rod-shaped member that projects in the centripetal direction from the inner peripheral surface of the container 7. The stopper 4A may be provided below the guide rod 2a of the float valve 2.

The lower end of the container 7 is lower than the upper surface 1a of the valve seat 1. Other configurations are the same as those in FIG. 8, and the same reference numerals indicate the same parts.

Next, the operation of the low tank water discharging device of the prior application will be described. Chain 5b by lever handle,
When the float valve 5a is pulled up, the float valve 2 is pulled up, and the water in the low tank goes around the lower end of the container 7 and flows out from the valve seat 1. At this time, the valve body 9 is pulled up together with the chain 5b, the opening 8 is opened, and water flows into the container 7 through the opening 8. For this reason, the inside of the container 7 is kept full.

When the hand is released from the lever handle, the chains 5b and 5a are lowered. When the chain 5b descends, the valve body 9 closes the opening 8 on the upper part of the container 7. For this reason, the inside of the container 7 remains filled with water, and the float valve 2 remains floating. Then, the water in the low tank goes around the lower end of the container 7, reaches the valve seat 1, and continues flowing out.

Until the water level in the low tank reaches the lower end of the container 7, the outflow of water in the low tank continues. During this time, the inside of the container 7 is kept full. Also,
For this reason, the float valve remains floating in the container 7.

When the water level in the low tank reaches the lower end of the container 7, air enters into the container 7 from the lower end of the container 7, the water level in the container 7 drops rapidly, and the float valve 2 moves the valve seat 1 And the outflow of water is stopped.

As described above, the water in the low tank is discharged until the water level reaches the lower end of the container 7.
Therefore, by setting the position of the lower end of the container 7 sufficiently low, the amount of residual water in the low tank can be reduced.

[0019]

As is well known, siphon type Western style toilets (siphon type Western style toilets, siphon jet type Western style toilets, etc.) are configured to drain sewage in toilet bowls to a drain port by siphon action. It was done.

In this siphon type Western style toilet, it is desired to supply a relatively large amount of washing water to start the siphon early after the supply of washing water is started. It is expected that a sufficient amount of washing water will be supplied to maintain the siphon, and that the siphon action will be continued for a long time.

[0021] The present invention has been made in view of such circumstances, and can reduce residual water in a low tank similarly to the above-mentioned prior application, and furthermore, continuously wash water with an amount of water capable of maintaining a siphon for a long time. An object of the present invention is to provide a water discharge device for a low tank that can be discharged.

[0022]

According to a first aspect of the present invention, there is provided a low tank water spouting device having a valve seat mounted on a washing water outlet of a bottom wall of the low tank and a float valve seated on the valve seat. In the above, the float valve is provided with a bottomless closed container that accommodates the float valve therein so as to be vertically movable, a support member that supports the container vertically movable with respect to the low tank, and is provided at an upper portion of the container, A one-way valve that allows only the flow of fluid from the inside of the container to the outside of the container,
A linear mechanism for pulling up the container, which connects the starting mechanism and the container to start water discharge of the water discharging device, and wherein water is provided between the float valve and the container. It is characterized in that a gap that allows circulation is provided.

According to a second aspect of the present invention, in the first aspect, the upper part of the inner surface of the container and the float valve are connected by a linear member.
When the container is pulled up by the linear body,
The float valve has a length for holding and lifting the float valve in the container.

[0024]

In the water discharge device for a low tank according to the first aspect of the present invention, when the amount of water stored in the low tank is full, the float valve is installed near the bottom of the low tank and is seated on the valve seat by water pressure. Further, the vertically movable container is also located at the lowermost limit due to the weight of the container, and the lowering position is maintained by the support member supporting the settling stopper of the container from below.

In the water discharge device for a low tank according to the present invention,
Operate the starting mechanism to start spouting. When the linear body is pulled up by operating the starting mechanism, the container is pulled up, and the float valve is also pulled up by the negative pressure in the container caused by the lifting of the container,
The water in the low tank flows out through the valve seat. When the hand is immediately released from the starting mechanism, the container descends together with the linear body, but once the float valve is separated from the valve seat due to its own buoyancy, it does not sit on the valve seat again and starts to float. The buoyancy of the float valve is greater than the underwater weight of the container. Since a gap allowing water to flow is provided between the container and the float valve, the float valve floats in the container, contacts the container at the step in the container, and floats together with the container. Thereafter, the container stops at the ascent limit position by the floating stopper of the container. When the container stops at the upper limit position, the distance between the valve seat and the float valve is relatively large, so that a relatively large amount of water flows out. This water flow is a water flow that activates the siphon at an early stage in the siphon type Western style toilet.

When the float valve floats in the vessel, water in the vessel, which is compressed by the float valve and the vessel inner wall, is provided between the one-way valve provided at the top of the vessel and the vessel and the float valve. Escapes out of the container through the gap. One-way valves allow only fluid flow from inside the container to outside the container. Therefore, there is no invasion of fluid from the outside of the container to the inside of the container.

When the water level in the low tank falls with the outflow of water, the container having the built-in float valve also falls with the water level and is again positioned at the lower limit. At this time, the distance between the valve seat and the lower end of the container becomes relatively narrow and the resistance increases, so that the amount of effluent water is limited and reduced. This reduced water flow is the water flow that sustains the siphon.

Until the water level in the low tank reaches the lower end of the container, the outflow of water in the low tank continues. During this time, the inside of the container is maintained in a full state. For this reason, the float valve remains floating in the container.

When the water level in the low tank reaches the lower end of the container, air enters the container from the lower end of the container, the water level in the container rapidly drops, the float valve sits on the valve seat, and the water flows out. Is stopped. Therefore, water flows out until the water level in the low tank reaches the lower end of the container, and it takes time for the water in the container to escape, so that the water flows out to the valve seat, so that the amount of residual water in the low tank decreases.

As described above, in the water discharge device for a low tank according to the present invention, residual water in the low tank is reduced. Also,
Simultaneously with the operation of the lever handle, it is possible to supply a relatively large amount of washing water for activating the siphon to the siphon-type Western-style toilet at an early stage, and to supply a sufficient amount of water for connecting the siphon for a relatively long time thereafter.

In the water discharge device for a low tank according to the second aspect, the upper part of the inner surface of the container and the float valve are connected by a linear member. The linear member has a length sufficient for the float valve to be seated on the valve seat when the container is at the lower limit position, and the float valve is housed in the container which is raised by operating the starting mechanism. It has a length that can be operated like a container.

As described above, the float valve normally sits on the valve seat to stop the outflow of water. However, by operating the starting mechanism of the water discharging device, the action is transmitted by the linear body. Then, the container is lifted up together with the container and the outflow of water starts.

[0033]

An embodiment will be described below with reference to FIGS.

FIG. 1 is a longitudinal sectional view showing a water discharge device of a low tank according to an embodiment when the low tank is full, and FIGS. 2 to 5 are longitudinal sectional views respectively showing the operation of the water discharge device of the low tank. FIG. FIG. 6 is a time diagram of the amount of water supplied to the water discharge device of the low tank.

In the water discharge device of this low tank, as shown in FIG. 1, a bottomless closed container 7 is arranged so as to cover the float valve 2 having a circular horizontal cross section. The container 7 can move up and down, and is normally positioned at the lower limit by its own weight. Also, when the water spouting device starts spouting,
The container 7 is pulled up by the chain 5. The container 7 is composed of a lower container 7a containing the float valve 2 and an upper container 7b provided with a one-way valve on the upper surface. The lower container 7a is inserted into the upper container 7b, and the joint is reliably kept airtight.

The inner diameter of the lower vessel 7a is slightly larger (1-2 mm in diameter) than the outer diameter of the float valve 2, so that the float valve 2 can freely move up and down in the lower vessel 7a. Water and air can flow through a gap 8 between the float valve 2 and the inner wall of the lower container 7a.

The inner diameter of the upper container 7b is slightly smaller than the inner diameter of the lower container 7a and the outer diameter of the float valve 2. Thus, a step 9 protruding into the container 7 is provided around the joint between the upper container 7a and the lower container 7b. As described above, the float valve 2 can move up and down in the lower container 7a, but since the step 9 contacts the float valve 2, the float valve 2 cannot enter the upper container 7b. .

The upper container 7b has a one-way valve 1 on its upper surface.
Has zero. The one-way valve 10 is a valve that allows only a fluid flow from the inside of the container 7 to the outside of the container 7. Therefore, water does not enter the container 7 from outside the container 7 through the one-way valve 10.

The container 7 and the float valve 2 are connected by a chain 5a. This chain 5a is
The float valve 2 has a length sufficient to seat on the valve seat 1 when is in the lower limit position. Also, this chain 5
a, when the container 7 is pulled up by the chain 5, the container 7 is in a taut state and the float valve 2
Has a length that allows it to be pulled upward as well.

An annular settling stopper 11 and a floating stopper 12 are provided on the outer wall surface of the container 7. As described above, the container 7 can be moved up and down, and is normally located at the lower limit by its own weight, but is pulled up by the chain 5 at the start of water discharge. The lower limit position of the container 7 is set when the settling stopper 11 comes into contact with the support member 13 fixed to the overflow pipe 3. Similarly, the uppermost position of the container 7 corresponds to the floating stopper 12
Is set by contact with the support member 13.
Thus, the container 7 can be moved up and down between the settling stopper 11 and the floating stopper 12, and usually the container 7
Due to its own weight, it is located at the lower limit within the movable range as shown in FIG.

Other configurations of the low tank water discharging device of this embodiment are the same as those in FIG. 8, and the same reference numerals indicate the same parts.

Next, the operation of the low tank water discharge device of this embodiment will be described.

When the chain 5 is pulled up by operating the starting mechanism of the water discharging device such as a lever handle, the container 7, the chain 5a and the float valve 2 are pulled up almost simultaneously as shown in FIG. When the float valve 2 is raised in this manner, the water in the low tank passes through the lower portion of the float valve 2 and starts flowing out of the valve seat 1. When the hand is released from the lever handle, the chain 5 and the container 7 start to settle by their own weight. On the other hand, the float valve 2 distant from the valve seat 1 does not sit on the valve seat 1 due to its own buoyancy,
Start ascent. The float valve 2 floats in the lower container 7a, and finally contacts the step 9 as shown in FIG. When the float valve 2 rises up the container 7, water in the container 7 is pushed out of the lower container 7 a by the float valve 2, passes through the gap 8 and the one-way valve 10, and is discharged out of the container 7.

The buoyancy of the float valve 2 is set to be larger than the sum of the weights of the container 7, the chains 5, 5a in water, and the float valve 2 floats together with the container 7. Container 7
Rises until the floating stopper 12 and the support member 13 come into contact with each other, and reaches a limit position as shown in FIG. 3 and stops.

In the state shown in FIGS. 2 and 3, since the interval between the float valve 2 and the valve seat 1 is relatively wide, the valve seat 1
A large amount of water flows out of at high flow rates. Such a large amount of water flowing out at a high outflow speed allows the siphon to be activated at an early stage in the siphon-type toilet.

When the water level in the low tank falls with the outflow of water, the container 7 with the built-in float valve 2 also falls with the water level, and the settling stopper 11 contacts the support member 13 as shown in FIG. The container 7 is again located at the lowermost limit within the movable range.

With the container 7 stopped at the lower limit, the outflow of water in the low tank continues until the water level in the low tank reaches the lower end of the container 7. During this time, the upper container 7b maintains a full state. For this reason, the float valve 2 remains floating in the container 7.

When the container 7 is located at the lower limit, the distance between the valve seat 1 and the lower end of the container 7 is relatively narrow, and the resistance to flowing water is large. 3 is reduced compared to the state of FIG. Then, the outflow of water continues for a long time at the reduced outflow speed. The water flow during this period allows the siphon-type Western style toilet to keep the siphon for a relatively long time.

When the water level in the low tank reaches the lower end of the container 7, air enters into the container 7 from the lower end of the container 7, and the water level in the container 7 gradually decreases, and as shown in FIG. 2 is seated on the valve seat 1 and the outflow of water is stopped.

As described above, the water in the low tank is discharged until the water level reaches the valve seat 1. Therefore, when the container 7 is lowered to the lower limit,
By setting the position of the lower end of the tank sufficiently low, the amount of residual water in the low tank can be reduced.

In this embodiment, the chain 5a for connecting the container 7 and the float valve 2 is used. However, the use of the chain 5a allows the float valve 2 to follow the container 7 and to be reliably lifted. The operation of the device is very reliable.

In this embodiment, the container 7 is made of a material that sinks under its own weight, but may be made of a material that floats on water. In this case, when the water level is full, the container 7 is pulled downward by the float valve 2 seated on the valve seat 1 via the chain 5a and positioned at the lower limit. In this case, there is an effect that the steering operation becomes light.

When the container 7 is suddenly pulled upward through the chain 5, a negative pressure is temporarily generated in the container 7, and the float valve 2 is pulled by the container 7 and the valve seat 1 Since they are farther apart, the chain 5a may be omitted. Also, a protrusion is provided on the outer peripheral surface of the float valve 2, a groove in which the protrusion is engaged extends vertically in the inner wall of the lower container 7 a, and the protrusion is engaged with a lower end of the vertical groove. The chain 5a is unnecessary even in a case where the float valve 2 does not fall out of the lower container 7a.

Although the chains 5 and 5a are used in the above embodiment, a linear body (for example, a resin tape or a string) other than the chain may be used in the present invention.

[0055]

As described above, according to the low tank water discharger of the present invention, the residual water level in the low tank is reduced.
Further, the water discharge device for a low tank according to the present invention is provided with a mechanism for changing the amount of effluent in accordance with the water level in the low tank. It is possible to control the flow over time so that the outflow of the flow continues for a long time. This makes it possible to activate the siphon in the siphon type Western style urinal at an early stage, and then to maintain the siphon for a relatively long time thereafter.

According to the low tank water discharging device of the second aspect, the float valve can be reliably operated by using the linear body.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a water discharge device for a low tank according to an embodiment.

FIG. 2 is a longitudinal sectional view of the water discharge device for a low tank according to the embodiment.

FIG. 3 is a vertical sectional view of a water discharge device for a low tank according to the embodiment.

FIG. 4 is a longitudinal sectional view of a water discharge device for a low tank according to the present embodiment.

FIG. 5 is a longitudinal sectional view of a water discharge device for a low tank according to the present embodiment.

FIG. 6 is a time diagram of the supply water amount of the low tank water discharge device according to the present embodiment.

FIG. 7 is a longitudinal sectional view of a low tank water discharge device of the prior application.

FIG. 8 is a longitudinal sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve seat 2 Float valve 4 Stopper 5, 5a Chain 7 Container 7a Lower container 7b Upper container 9 Step 10 One-way valve 11 Settling stopper 12 Floating stopper 13 Supporting member

Claims (2)

(57) [Claims] 1. A low tank spouting device having a valve seat attached to a washing water outlet on a bottom wall of a low tank, and a float valve seated on the valve seat, wherein the float valve is vertically movably accommodated therein. A closed bottomed container, a supporting member for vertically supporting the container with respect to the low tank, and a supporting member provided on the upper portion of the container, allowing only a flow of fluid from the inside of the container to the outside of the container. A one-way valve, and a linear body for pulling up the container, which connects the starting mechanism and the container to start water discharge of the water discharging device, and wherein the float valve and the container A water discharge device for a low tank, wherein a gap that allows water to flow is provided therebetween. 2. The container according to claim 1, wherein an upper portion of the inner surface of the container and the float valve are connected by a linear member, and the linear member is configured such that when the container is pulled up by the linear member, A water discharge device for a low tank, wherein the water discharge device has a length that holds the float valve in the container and pulls up the float valve.