JP2003239348A - Drain valve device and draining device and toilet bowl - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reconcile operability and draining performance while simplifying the constitution of a drain valve device. <P>SOLUTION: This drain valve device 110 blocks up a through hole 128 of a cover body by a float 122 floating up to an under surface of the cover body 126, and maintains this state by using float buoyancy, and a valve element 112 also maintains valve opening during this time. Wash water in a tank flows out of a drain port 108, and a water level in the tank lowers, and a sleeve 124 maintains a blocking-up state of the through hole 128. When the water level in the tank lowers up to an air inflow hole 134 on the sleeve lower end, air flows inside the sleeve, and the wash water filled up in the sleeve falls from the inside of the sleeve. Thus the float 122 lowers by losing the buoyancy, so that the valve element 112 closes a valve. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain valve device for draining cleaning water in a tank from a drain port on a bottom wall of a tank, a drain device having the drain valve device, and a toilet bowl.

[0002]

2. Description of the Related Art This type of drainage valve device is submerged in a tank for storing flushing water, and is often used for flushing water drainage to various drainage destinations such as toilet bowls and simple showers.

In the drain valve device, the valve body is brought into contact with the valve seat around the drain port on the bottom wall of the tank, and the valve body is lifted from the valve seat to open the drain port and perform drainage. The valve body thus opened receives the buoyancy force from the float to maintain the valve open state, and drains during this valve open. When the water level in the tank drops and the water level around the float drops, the float drops while being exposed to the water surface along with the drop in water level. As a result, the valve body eventually comes into contact with the valve seat and closes the valve, and the wash water drainage is stopped. After the drainage is stopped, cleaning water is replenished in the tank in preparation for the next drainage.

[0004]

Various proposals have been made in order to maintain the above-mentioned valve opening and to ensure the closing of the valve as described above. A valve mechanism is provided in the float storage container, and this valve mechanism closes the inside of the container to maintain the valve open. However, the valve device proposed in this publication requires a valve mechanism different from the float, which complicates the work of manufacturing and assembling parts.

When draining the wash water, the valve body is lifted by a ball chain or a shaft. This valve body lift requires a force (lift force) that exceeds the water pressure (total water pressure) of the wash water in the tank that presses the valve body toward the valve seat. This water pressure is
Since it is proportional to the valve body area and the height from the valve body to the water surface when the tank is full (head pressure), widening the valve body area requires a large lift force and impairs operability. On the other hand, when the valve body area is narrowed, the valve seat opening area is also narrowed accordingly, which leads to a reduction in the amount of drainage per hour and drainage performance.

The present invention has been made in order to solve the above-mentioned problems, and an object thereof is to simplify the structure and to achieve both operability and drainage performance.

[0007]

In order to solve at least a part of the above problems, the drain valve device of the present invention is a drain valve device for draining cleaning water in a tank from a drain port on a bottom wall of a tank. A valve body that contacts the valve seat around the drainage port and opens and closes the drainage port, a lifter that lifts the valve body to the valve opening side, and a float, and the buoyancy of the float is lifted by the lifter. And a float mechanism that maintains the valve opening of the valve body by acting on the valve body, and closes the valve body when the water level in the tank decreases.
The float, which surrounds the float and forms a floating / floating region of the float, and a lid body that closes the upper end of the sleeve and has a through hole, and floats the through hole to the lower surface of the lid body by buoyancy, It is characterized in that the closed state of the through hole is maintained at the air inflow position of the lower portion of the sleeve until the inflow of air from the outer side to the inner side of the sleeve starts.

In the drainage valve device of the present invention having the above-mentioned structure, the valve opening of the valve body is maintained while the lid through hole is closed by the float that floats to the lower surface of the lid. That is, while the valve body is open, the cleaning water in the tank flows out from the drain port and the water level in the tank drops, but in the sleeve,
Since the lid through-hole is closed, the inside of the sleeve remains filled with cleaning water, and even in the lid through-hole, it remains closed due to the float that receives buoyancy. Then, when the water level in the tank continues to drop to the air inflow position in the lower portion of the sleeve, air flows from the outside of the sleeve to the inside of the air at this air inflow position. The cleaning water filling the inside of the sleeve falls from the inside of the sleeve as the air flows into the sleeve. Therefore, the float loses its buoyancy and descends as the cleaning water in the sleeve falls, and the closed state of the through hole disappears. In this case, the valve body cannot be kept open due to the buoyancy force exerted by the float on the valve body, so the valve body closes. Since the opening state of the valve body and the subsequent closing of the valve only involve the closing state of the lid through hole of the float alone, no valve mechanism other than the float is required. Therefore, the structure can be simplified, the assembling and manufacturing work can be simplified, and the cost can be reduced. If the cleaning water in the sleeve drops suddenly,
Float buoyancy seems to disappear because almost all floats are exposed. On the other hand, if the wash water falls slowly, the float buoyancy decreases with the fall, and the floating / sinking state of the float becomes constant over time, so the float buoyancy becomes the minimum buoyancy determined in this state.

Further, in the above drain valve device of the present invention, as long as the full level of the washing water in the tank when the valve body is closed is above the lid body at the upper end of the sleeve, the float floats to the lower surface of the lid body. It is possible to close the through-hole of the lid and maintain the closed state thereafter. Therefore, it is not necessary to set the full water level to a position higher than the sleeve lid carelessly, and the head pressure in the tank can be reduced accordingly. Therefore, even if the area of the valve element is widened, the lift force required to open the valve element can be reduced, and operability and drainage capacity can be maintained. In this case, when it is required to drain a predetermined amount of washing water, for example, a total amount of washing water of about 5 liters or 6 liters, if the tank shape has a wide bottom area,
As described above, even with a low head pressure, the predetermined amount of wash water can be drained. In addition, when opening the valve body using an actuator such as a motor, or when opening the valve body with a small operating force using the lever principle,
There is no problem even if the tank bottom area is narrowed to increase the full water level.

The drain valve device of the present invention having the above-mentioned configuration can also take the following modes. That is, the float mechanism may include an upper water storage portion formed on the upper surface side of the lid body so as to surround the through hole and storing the cleaning water in the tank above the through hole. it can. This has the following advantages.

Closure of the through-hole of the lid occurs when the float receiving buoyancy floats up to the lower surface of the lid, and in order to secure this closed state, a seal member is provided around the through-hole and the float to ensure watertightness. Is effective. Here, if the watertightness is insufficient, a gap will remain at the closed position of the through hole, and washing water may leak from the upper surface to the lower surface of the lid through this gap. In this case, when the water level in the tank is lowered below the lid as the washing water in the tank is discharged from the drain port, the leakage of the washing water from the through hole of the lid causes the inflow of air into the sleeve from this through hole. Finally cause. Therefore, the cleaning water filling the inside of the sleeve drops downward, the buoyancy exerted on the valve body by the float is reduced as described above, and the valve body closes.

However, in the above aspect of the present invention, the lid has the upper water storage portion which is formed in a cylindrical shape so as to surround the through hole and stores the cleaning water in the tank above the through hole. While such a leak is occurring, it is possible to maintain the condition that the wash water remains in the upper water storage section on the upper surface side of the lid.

When such a situation occurs, the leakage of the residual cleaning water in the upper water storage portion and the decrease in the tank water level due to the outflow of the cleaning water in the tank from the drain port occur concurrently.
Now, in the situation where the water level in the tank reaches the air inflow position in the lower part of the sleeve and air is about to flow into the sleeve, all the residual cleaning water in the upper water reservoir leaks and the water reservoir is emptied. Suppose that it happened earlier than the situation (that is, the situation where the wash water is still stored). In this case, air does not enter from the upper surface of the lid through the through hole until the water level in the tank reaches the air inflow position in the lower portion of the sleeve. Therefore, during this period, the inside of the sleeve is filled with the cleaning water, and the float remains floating on the lower surface of the lid. Then, if the water level in the tank reaches the air inflow position in the lower portion of the sleeve during continuous leakage, air inflow occurs from the outer side of the sleeve to the inner side.
As described above, the float separates downward and the valve body closes. As a result, even if the watertightness is insufficient when the through hole is closed by the float, the valve body can be kept open and the valve body can be closed without any trouble. Therefore,
The float, the bottom surface of the lid, and the through hole do not require mechanical processing to install a seal member or ensure watertightness, which simplifies the manufacturing and assembly of parts and is useful for reducing the cost of manufacturing and assembling parts. Is.

There are also the following advantages. When air flows in from the lower end of the sleeve, the air passes through the through hole of the lid in the sleeve, and the residual cleaning water in the upper water storage portion vigorously flows down through the through hole as the air passes. The residual wash water that flows down forcibly pushes the float downward, so that the float can be quickly separated from the lower surface of the lid together with the inflow of air into the sleeve. Therefore, the valve body can be closed quickly with high response.

On the other hand, by adjusting the amount of water stored in the upper water storage section, all residual cleaning water in the upper water storage section leaks out and the water storage section becomes empty. It can also happen earlier than when reaching the air inflow location. In this case, air enters the inside of the sleeve through the through-hole of the lid, and the atmosphere in the sleeve is released to the atmosphere. Get away from your body. Then, the valve body closes. Therefore, the valve body can be closed even before the water level in the tank reaches the air inflow position in the lower portion of the sleeve, and the drainage can be stopped at an early stage.

In this case, the above-mentioned through hole may be one that is closed by a float, and in addition to a single through hole,
The small-diameter through holes may be scattered on the lid. In the latter case, each small-diameter through hole may be closed by the float, and the upper water storage part may store the cleaning water so as to surround each small-diameter through hole.

Even if the upper water storage section is provided in this way,
It is not necessary to carelessly raise the full water level in the tank, because the full water level may be set so that the upper water storage part is submerged.

Further, the lifter is provided with a shaft having the valve element at a lower end thereof so as to be vertically movable, and the float mechanism includes the sleeve and the upper water reservoir so that the shaft penetrates the through hole. And the float is integrally provided with the shaft around the shaft,
The shaft may be configured to move up to a closing position where the float reaches the lid and closes the through hole.

In this way, the float mechanism can be integrated around the lifter, which makes the handling convenient. Moreover, since the valve body opening (drainage port opening) and the through-hole closing can be performed simultaneously by the raising operation of the shaft, the drainage operation is also simplified. After the shaft has moved upward, as described above, the valve body valve is closed (drainage is stopped) through the maintenance of the through hole blockage due to the float and the inflow of air when the water level in the tank is lowered.

In addition to raising the shaft to the closed position in this way, it is also possible to raise the shaft to an intermediate position before the closed position. When the shaft moves up to this intermediate position, the lid through hole is not closed. Therefore, at the same time as the water level in the tank is lowered due to the valve opening, the cleaning water in the upper water storage portion quickly flows into the sleeve through this through hole, and the inside of the sleeve is released to the atmosphere. For this reason, the water level inside the tank similarly drops inside and outside the sleeve. The float descends after being exposed to the water surface as the water level in the tank decreases. As a result, the valve body descends together with the shaft to close the drain port. Since such valve closing occurs before the water level in the tank reaches the air inflow position in the lower portion of the sleeve, the total drainage amount in this case is smaller than that when the shaft is moved up to the above-mentioned closed position. Therefore, when the shaft is moved up to the closed position and when it is moved up to the intermediate position,
It can be different total drainage. As a result, it is suitable for a drainage destination where it is required to use different amounts of wastewater in different total amounts of wastewater, for example, a toilet bowl that requires different amounts of washing water for washing during stool and washing during urination.
Besides, it is also suitable for a simple shower or the like in which the amount of shower water can be set large or small.

When the upper water storage portion is provided as described above, the water storage amount of the upper water storage portion can be adjusted. By doing so, the above-mentioned leakage time of the cleaning water can be set to be long or short, which has the following advantages.

The time required for the water level in the tank to reach the air inflow position below the sleeve (water level descent time) can be adjusted to be shorter or longer depending on the opening area of the drainage port and the full water level. Therefore, the leakage time can be delayed or accelerated with respect to the water level fall time by both the adjustment of the opening area and the like and the adjustment of the storage storage amount of the upper water storage section. By the way, it is difficult to adjust the opening area of the drain port because it is an opening on the bottom wall of the tank, while the upper water storage section is different from the tank, so the adjustment is easy. Therefore, it is possible to easily adjust the length of the water level drop time and the leakage time.

In order to adjust the storage amount as described above, a cylindrical body protruding above the lid so as to surround the through hole may be provided, and the protruding height of the cylindrical body may be adjusted. . The tubular body has a first tubular body protruding above the lid body and a second tubular body incorporated in the first tubular body, and the second tubular body is It suffices that it can be slid up and down with respect to the first tubular body. Alternatively, a cylindrical body protruding above the lid so as to surround the through hole,
By closing the tubular body having side wall through-holes penetrating the side wall at respective positions with different heights from the lid upper surface, and closing the side wall through-holes in the tubular body, and adjusting the closed state, It is also possible to have an unoccluded closing body that changes the side wall through-hole located at the lowermost stage. A tubular body projecting upward from the lid so as to surround the through hole, the tubular body having an opening on a side wall for allowing wash water to flow inside and outside the tubular body; It is also possible to have a closing body that changes the opening condition of the opening in the body. With the above configuration, the stored amount can be easily adjusted.

Further, the upper water storage portion stores the wash water in a state of being submerged in the wash water in the tank, and is exposed on the water surface as the water level in the tank lowers. Therefore, when exposed to the water surface, the wash water stored in the upper water storage portion flows out from the through hole or opening of the side wall of the tubular body. Therefore, it is possible to adjust the area of the side wall through hole and the opening to adjust the situation in which the wash water flows out from the upper water storage section. For example, since the bottom positions of the through holes and openings are the same, the final wash water storage amount is the same, but if the area is different, the upper water storage part will change from full water to the final storage condition. There is a difference in the elapsed time until it becomes. Therefore, even with such area adjustment,
Since the above-mentioned leakage time of stored cleaning water can be adjusted,
The range of adjustment of the water level drop time and the leak time is widened.

In addition to this, the water supply valve device of the present invention can also take the following modes. That is, in the sleeve, the inflow position of air from the sleeve outer side to the sleeve lower side portion can be adjusted in the sleeve height direction. In this way, it is possible to adjust the timing of inducing air inflow that accompanies the decrease in the water level in the tank. As described above, this inflow of air causes the buoyancy of the float to be reduced, and the valve body is closed. Therefore, the amount of drainage cleaning water can be adjusted by adjusting the air inflow position.

Further, the shaft is a hollow shaft which is submerged in the cleaning water in the tank and has the valve element around the lower end side, and has a cup portion expanded in a cup shape at the upper end, and the float mechanism is The sleeve is provided so that the cup portion is located above the lid of the sleeve, and further,
A cup valve body, which is disposed in the upper end cup portion of the hollow shaft submerged in the cleaning water in the tank, opens and closes a hollow hole of the hollow shaft, and a lifter that lifts the cup valve body to the valve opening side. Can be one. In this way, different total amounts of drainage can be generated as follows.

First, when the hollow shaft is used to open the valve body and to close the lid through hole with the float while the cup valve body is closed, the drain port is opened. Therefore,
The washing water in the tank is discharged from the drain port, and the water level in the tank drops. Due to this lowering of the water level, the cup portion is exposed on the water surface with the cleaning water stored therein, and the buoyancy when the cup portion is submerged disappears. Therefore, the weight of the cup portion and the washing water inside the cup portion is applied to the float via the hollow shaft. Then, the float that has closed the through-hole of the lid is pushed by the weight of the washing water inside the cup and the inside of the float and is separated from the lid, and the blockage of the through-hole is eliminated. Therefore, air flows into the sleeve through the through hole, so that the inside of the sleeve is released to the atmosphere, and the water level in the tank similarly drops inside and outside the sleeve. Then, as the water level in the tank lowers, the float is exposed to the water surface and then descends, so that the valve body descends together with the shaft to close the drain port.
Such valve closing occurs before the water level in the tank reaches the air inflow position in the lower part of the sleeve. Less than if

When the valve is closed, the cup portion applies the weight of the washing water to the valve body through the hollow shaft, so that the valve body is quickly closed. When the valve element is opened by the hollow shaft while the valve element of the cup part is closed, the float may not reach the lower surface of the lid element. Even in this case, since the lid through hole is not closed, the inside of the sleeve can be released to the atmosphere, and the drainage can be performed with a small drainage amount as described above.

However, when the valve portion of the cup portion is opened,
The washing water inside the cup portion and the washing water above the upper end of the cup portion pass through the hollow shaft and are discharged from the drain port. As a result, the water level in the tank drops to the upper end of the cup.In this state, the cup becomes empty, which causes more buoyancy. It also takes buoyancy. Then, the valve element opens apart from the valve seat of the drain port, and the wash water is directly drained from the drain port. Moreover, even if it floats, it receives the buoyancy of the cup part in addition to its own buoyancy.
It floats up to the lower surface of the lid and closes the through hole of the lid. In this case, since the float does not receive the weight of the washing water in the cup, the through hole is closed until the water level in the tank reaches the air inflow position below the sleeve and air inflows into the sleeve. Maintained. Therefore, the valve body closes as described above with the inflow of air into the sleeve, and the total amount of drainage at this time is larger than that when the cup valve body is closed. Depending on the choice of body opening and closing, different amounts of drainage can be used.

Further, when the shaft is selectively moved up to the closed position of the through hole of the lid or the intermediate position in front of the closed position, the shaft is located above the float mechanism and below the shaft. The weight may be a force exerting force, and the weight may be washing water stored in a cup-shaped container having an open upper end when the cup-shaped container is submerged in the tank cleaning water.

In this way, after the container is exposed from the surface of the cleaning water in the tank, the weight of the container and the cleaning water in the container is always applied to the float and the valve body. Therefore, when the ascending operation to the closed position occurs, the float causes the weight of the float to move away from the lower surface of the lid before the water level in the tank reaches the air inflow position in the lower part of the sleeve to close the through hole. The condition disappears early. Therefore, the total amount of drainage can be reduced as compared with the case where there is no weight. on the other hand,
In the case of the ascending operation to the intermediate position, the valve body can be closed earlier by the amount of the weight, and the total drainage amount can be reduced as compared with the case without the weight. In other words, even if the drainage is performed with different total drainage, the total drainage can be adjusted to the decreasing side. Further, since the wash water is used for the weight, a dedicated weight or the like is unnecessary, which is advantageous in terms of cost.

If the amount of cleaning water stored in this container can be adjusted, the amount of weight applied to the float and the valve body can be adjusted to a large or small amount, so that the total amount of drainage can be adjusted to various degrees. Also, by adjusting the height of the container at the submerged position of the wash water in the tank, the timing at which the container is exposed to the water surface, that is, the timing at which the weight is applied, can be adjusted, so the timing at which the closed state disappears can be changed, and the total amount of drainage can be changed. Can provide a new adjustment method. In addition, when the water level in the tank is lowered and the water level in the container is higher than the water level in the tank, the amount of water flowing out of the container to the outside can be adjusted. By doing this, it is possible to change the rate of change in the weight of the float and valve body,
For example, if the amount of water per unit time is increased, the weight exerted by the container can be quickly reduced. Also, by reducing the amount of water per hour, the weight exerted by the container can be reduced only gradually. As a result, since the timing of disappearance of the closed state can be changed even in this way, a new method of adjusting the total amount of drainage can be provided.

The above drain valve device can be applied to a drain device which opens and closes the drain port on the bottom wall of the tank by using this drain valve device. Further, such a drainage device can be applied to a toilet bowl that flushes flush water into a toilet bowl portion using the drainage device to wash the toilet bowl. In particular, in a toilet bowl, these drainage devices can be used even for those that use different amounts of flush water depending on whether they are large or small.

In order to solve at least a part of the above-mentioned problems, another drain valve device of the present invention is a drain valve device for draining cleaning water in a tank from a drain port on a bottom wall of a tank.
A first valve body that abuts on a valve seat around the drainage port to open and close the drainage port, and a hollow shaft that has the first valve body around the lower end side and is submerged in the wash water in the tank A hollow shaft having a cup portion expanded in a cup shape and movable up and down; a float disposed around the hollow shaft and integrated with the hollow shaft; and a sleeve disposed surrounding the float. A partition wall for partitioning the inside of the sleeve into upper and lower partition regions, wherein the upper partition region is a floatation / sink region of the float, and the lower partition region is a vertical movement region of the first valve body. A second valve body that is disposed in the partition wall having a throttle hole that communicates the upper and lower partition regions and the upper end cup portion of the hollow shaft that is submerged in the wash water in the tank, and that opens and closes the hollow hole of the hollow shaft When, And having a lifter for lifting the second valve body to the valve opening side.

In another drainage valve device of the present invention having the above structure, there is a difference in the total amount of drainage between the case where the first valve body is opened and the case where the second valve body is opened, as described below. Have it and drain the cleaning water in the tank.

First, a case will be described in which the first valve body is opened by the raising operation of the hollow shaft while the second valve body disposed in the cup portion at the upper end of the hollow shaft is closed. In this case, since the drain port is opened, the cleaning water in the tank is discharged and the water level in the tank is lowered. Further, the float floats in the upper partition area in the sleeve and exerts its buoyancy force on the first valve body via the hollow shaft. Therefore, the first valve body has the upper end of the lower partition area in the sleeve,
That is, it rises to the lower surface of the partition wall, and the drainage port is maintained in an open state.

Since the water level lowers while the drain port is open, the cup portion at the upper end of the hollow shaft is
First exposed on the surface of the water, the buoyancy disappears when the cup is submerged. At this time, since the cup portion keeps the washing water stored therein, the weight of the cup itself and the weight of the washing water inside the cup portion are applied to the float via the hollow shaft. Then, the float receives the above-mentioned weight against its own buoyancy. However, since the water level inside the tank is higher than that of the sleeve, the float remains completely submerged, so the float buoyancy prevails and the valve body remains open. This further lowers the water level in the tank.

When the water level in the tank falls below the upper end of the sleeve, the water level on the outer side of the sleeve is directly lowered by the drainage from the drain port. However, inside the sleeve, the passage of washing water from the upper partition area to the lower partition area is restricted by the throttle holes in the partition wall, so the water level in the sleeve falls to the outside of the sleeve later. However, since the float receives the weight of the washing water inside the cup portion and the inside thereof through the hollow shaft, most of the float is submerged in order to obtain the buoyancy to support this weight. As the water level in the upper section of the sleeve drops,
When most of the float descends while being submerged in water, the first valve body eventually descends to the drain port and closes. The timing of valve closing at this time is because the first valve body reaches the drainage port in a state in which the water level in the sleeve decreases less as the degree of submersion of the float becomes larger, and therefore, when the flush water is stored in the cup, Will be closed.

On the other hand, when the second valve body of the cup portion at the upper end of the hollow shaft is opened, the following occurs. in this case,
The washing water inside the cup portion and the washing water above the upper end of the cup portion pass through the hollow shaft and are discharged from the drain port. As a result, the water level in the tank drops to the upper end of the cup, and in this state, the cup becomes empty, which causes more buoyancy. The buoyancy of this cup is also applied. Then, the first valve body opens apart from the valve seat of the drainage port, and the wash water is directly drained from the drainage port. Therefore, after this, the water level in the tank decreases inside and outside the sleeve, as in the case of closing the second valve body.

However, since the cup portion is empty, only the weight of the cup portion is applied to the float and the first valve body. Therefore, most of the float floats above the surface of the water, and it descends as the water level decreases while maintaining a state of not being submerged. Therefore, in order for the first valve body to reach the drainage port, it is necessary to lower the water level more, and it is possible to increase the total amount of drainage discharged until the valve is closed.

As described above, according to the drain valve device of the present invention, the cleaning water in the tank can be drained with a difference in the total drainage amount. Further, in the drainage valve device of the present invention, the first valve body and the second valve body are only required if the full level of the washing water in the tank when the first valve body is closed is above the cup portion at the upper end of the hollow shaft. The wash water drainage can be performed through the selective opening of the. Therefore, it is not necessary to set the full water level to a higher position than the cup portion carelessly, and the head pressure in the tank can be reduced by that much.
Therefore, even if the area of the first valve body on the side of the bottom wall of the tank is widened, the lift force required to open the first valve body can be reduced, and the operability and the drainage capacity can be maintained. Since the position of the second valve body is the cup portion, the head pressure applied to the valve body is small and the valve opening operation is easy.

The drain valve device of the present invention can also be applied to a drain device which opens and closes the drain port on the bottom wall of the tank by using this drain valve device. In addition, such a drainage device can be applied to a toilet bowl that uses different amounts of flush water for excretion of flush water when flushing water into the bowl bowl using the drainage device to wash the toilet bowl.

[0043]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described based on examples. FIG. 1 is a schematic perspective view showing a toilet bowl 10 of an embodiment, FIG. 2 is a front view showing a front portion of the toilet bowl 10 partially broken away, and FIG. 3 is a side view showing a side surface of the toilet bowl 10 being partially broken away. FIG. 4 shows a flush water tank 1 of this toilet bowl 10.
It is explanatory drawing for demonstrating the appearance of the bottom face of 00.

As shown in these drawings, the toilet bowl 10 is
A toilet bowl main body 11 having a toilet bowl portion 12 to be described later is provided, and a flush water tank 100 is provided at the rear of the main body. The toilet body 11 and the flush water tank 100 are both made of pottery, and are integrally formed so that the flush water tank 100 rides on the upper surface of the toilet body 11. A toilet seat 11a and a toilet lid 11b are openably and closably attached to the rim 14 at the upper edge of the toilet body 11.

The flush water tank 100 has a substantially L-shaped outer shape in a plan view, and is provided with a rear tank portion 102 located behind the toilet body 11 and a side tank portion 104 located laterally of the toilet bowl. The upper end of each tank is closed by a lid 106. The rear tank portion 102 and the side tank portion 104 are connected and formed so that the inner regions thereof are continuous. The flush water tank 100 is a full tank which is slightly larger than the total flush water amount in the rear tank portion 102 and the side tank portion 104 in order to be applied to a toilet bowl having a total flush water amount of about 5.5 liters in case of stool. Store an amount of washing water (for example, about 5.6 liters). That is, the flush water tank 100 discharges approximately 5.5 liters of the flush water in the tank out of the amount of the flush water (approximately 5.6 liters) at the time of stool, and after flushing the toilet bowl, flushes approximately 5.5 liters of this flush water. It is replenished by a cleaning water replenishing mechanism such as a ball tap (not shown). In the present embodiment, the bottom surface area of the rear tank section 102 is set to about 360 cm ² (about 9x40) and the side tank section 104 is set to about 180 cm ² (about 9x20), so that the tank water amount (about 5.6 liters) is The full water level when stored is approximately 12.5 cm. However, the tank height from the upper surface of the toilet body 11 is set to about 20 cm including the lid in consideration of the margin for preventing the scattering of washing water from the full water level and the convenience of assembling the drain valve described later. . The height of the tank is 1/2 to 1/3 that of the existing toilet bowl with a tank.

As shown in FIG. 2, the bottom wall 103 of the rear tank portion 102 is inclined toward the side of the connecting portion with the side tank portion 104. In the side tank portion 104, the bottom wall 105 is inclined toward the drain valve arrangement portion 107 on the front side of the toilet bowl. That is, as shown in FIG. 4, the bottom wall 103 inclines from the rear tank section 102 to the side tank section 104 as indicated by the inclination symbol 103 a in the figure, and the side tank section 104 inclines in the figure. The bottom wall 105 is inclined like the symbol 105a. Therefore, at the end of discharge when the above-mentioned assumed amount of cleaning water (about 5.5 liters) is discharged, the cleaning water in the rear tank part 102 flows to the side tank part 104 side, and the drain water in the side tank part 104 drains. It flows to the valve arrangement portion 107 side. As a result, the bottom wall 103 of the rear tank section 102, which is separated from the drain valve installation section 107,
In particular, the cleaning water can be prevented from remaining on the bottom surface portion on the left side of the rear tank portion 102 in FIG.

Next, details of the drain valve device 110 and the toilet body 11 for draining the wash water from the wash water tank 100 will be described step by step. FIG. 5 shows a drain valve device 1
1 is an explanatory view showing the configuration of 10 in a sectional view taken along line 5-5 of FIG. 1, FIG. 6 is a sectional view taken along line 6-6 of FIG. 5, and FIG. 7 is 7- of FIG.
It is a 7 line sectional view.

The drain valve device 110 is used for the wash water tank 100.
It is arranged in the drainage valve arrangement portion 107 of the side tank portion 104 in the following manner. The drainage valve installation portion 107 has an opening 107a on the bottom surface thereof, and a valve seat sleeve 107b is watertightly mounted in the opening via a fixture 107c and a seal ring 107d. The valve seat sleeve 107b is
The through hole serves as a drain port 108 for washing water in the tank, and the upper edge of the through hole serves as a valve seat 109. As shown in FIG. 2, an L-shaped pipe 107e is attached to the fixture 107c, and the cleaning water in the tank is passed through a rim water passage described later through this pipe.

The drainage valve device 110 is in contact with the valve seat 109 around the drainage port 108 and opens and closes the drainage port 108, and the valve body 112 is provided at the lower end to move up and down for opening and closing the valve body. Hollow shaft 114 and open valve body 11
2 and a float mechanism 120 for closing the valve. The float mechanism 120 has a float 122 and a sleeve 124 that surrounds the float 122 and forms a float float-sink region.

The float 122 is a bottomed cylindrical body 122a.
The hollow shaft 114 is integrated with the hollow shaft 114 such that the open side of the hollow shaft 114 faces downward. The float 122 is submerged in the cleaning water in the tank with the air left inside during the standby for cleaning shown in FIG. The float 122 in this state exerts a buoyancy force caused by being submerged in water on the valve body 112 via the hollow shaft 114 when the valve body is opened.
Maintain 12 valves open. This float buoyancy decreases as the water level in the tank decreases, and the valve element 112 closes. The behavior of the float when maintaining and closing the valve body will be described later.

The valve body 112 has a closed seal 1 at the upper end with a bottom.
Have 23. The closing seal 123 is used for the float 12
As a result, the through hole 128, which will be described later, is closed from below. The closing seal 123 is formed of a sheet material of rubber / soft resin (for example, soft polyvinyl chloride (PVC), foamed polyethylene (PE), etc.), and prevents gas and liquid from leaking through the through hole 128 closed as described above. Block distribution. The degree of shielding will be described later.

The float 122 has a cylindrical body 122a.
An inner sleeve 122b is provided on the inside, and both of them are hermetically held by a seal ring 122c on the inner sleeve side.
FIG. 8 is an explanatory diagram for explaining how the inner volume of the float 122 is varied by the inner sleeve 122b. As shown, the float 122 includes an inner sleeve 122.
By pulling b downward, the internal volume can be increased or decreased, and the amount of buoyancy applied when submerged in water can be adjusted.

The sleeve 124 is arranged on the upper surface of the drain valve arrangement portion 107, and is fitted and fixed to the upper edge of the valve seat sleeve 107b. In the sleeve 124, legs 124a are erected at equal intervals around the lower end side of the sleeve, and the openings between the legs surround the periphery of the valve seat 109. Therefore, the opening between the legs serves as a water passage when the wash water in the tank reaches the drain port 108 and is drained. This inter-leg opening can also be used as an air inlet hole 134 described later, or the air inlet hole 1 can be used.
It may be provided separately from 34. The sleeve 124 is
A lid 126 is provided on the upper end side, and the hollow shaft 1 is provided at the center of the lid.
A through hole 128 into which 14 enters. Also, sleeve 1
Reference numeral 24 designates the upper part of the lid 126 as an upper water storage part 130 for storing the cleaning water in the tank at the time of waiting for cleaning shown in FIG. As shown in the figure, in this embodiment, the upper water storage unit 1
The water level that exceeds the upper end of 30 by about several millimeters is the full water level of the wash water, and in this state, the wash water of the above-described full water amount (about 5.6 liters) is stored. Note that the hollow shaft 114 is provided with overflow holes 115 at equal pitches for guiding the increased cleaning water to the drainage port 108 when the cleaning water is supplied to exceed the specified water level when the water supply mechanism (not shown) supplies water. ing.

The sleeve 124 is provided with through-hole projections 129 protruding from the opening edge of the through-hole 128 to the center at an equal pitch (see FIG. 6), and below the lid 126, the inner wall protruding from the inner wall of the sleeve to the center. The ridges 132 are provided at an equal pitch (see FIG. 7). The through hole protrusion 129 and the inner wall protrusion 132
Respectively face the hollow shaft 114 and the float 122 with a slight gap left between the hollow shaft 114 and the outer circumference of the float 122. Therefore, the hollow shaft 114 is guided by the through-hole projection 129 to move up and down substantially straightly, and even in the float 122, it moves up and down almost straight inside the sleeve 124. As a result, the valve body 112 abuts the valve seat 109 at substantially the same position to close the drain port 108. Since the outer circumference of the hollow shaft 114 is in contact with the through-hole projections 129 only by the inner wall projections 132, the hollow shaft 114 moves up and down smoothly.

Since the inner wall projections 132 are present only at equal pitches, the clearance between the float 122 and the inner peripheral wall of the sleeve 124 is wide as shown in the drawing. Therefore, as will be described later, when the air flows into the sleeve from the air inflow position in the lower portion of the sleeve, the inflow air quickly rises to the lid 126 of the inner wall of the sleeve through the gap. If the sleeve 124 has an inner diameter that is slightly larger than the outer diameter of the float 122, the outer diameter of the sleeve can be reduced, and the size can be reduced. In this case, if a vertical groove is formed on the inner wall of the sleeve between the lower end of the sleeve and the lid 126, this vertical groove serves as the above-mentioned rising path of the inflowing air, and the inflowing air is quickly swept. It can be raised to 126.

The sleeve 124 has air inlet holes 134 on the peripheral wall of the lower portion at equal pitches. This air inlet hole 134
When the water level in the tank outside the sleeve 124 drops to the upper end of the air inflow hole, the air in the tank flows into the sleeve and participates in closing the valve body as described later. The timing of this air inflow is determined by the hole upper end position of the air inflow hole 134.
Therefore, the total amount of cleaning water can be regulated by adjusting the upper end position of this hole. In this embodiment, the opening position of the air inflow hole 134 is adjusted so that the total amount of cleaning water is about 5.5 liters. At this time, the wash water tank 10
A total bottom area of 0 is also considered.

Next, the valve opening mechanism of the drain valve device 110 will be described. The drainage valve device 110 includes a lifting operation engaging member 140 formed at the upper end of the hollow shaft 114.
A large washing push button 142 and a small washing push button 144 arranged on the upper surface of the lid body 106 so as to be vertically movable, and a large washing link piece 143 for transmitting the pushing operation of each of these buttons to the hollow shaft 114. And a small cleaning link piece 145.

Each of the large washing push button 142 and the small washing push button 144 is constantly urged upward by a spring (not shown) so as to return to the original position after the pushing operation. The pressing operation of each pressing button is converted into the rotating operation of the large cleaning link piece 143 or the small cleaning link piece 145. When this link piece rotates, the engaging arm 146 that engages each link piece with the lifting operation engaging tool 140.
The hollow shaft 114 is lifted up through the valve body 1
12 separates from the valve seat 109 and opens the drain port 108.
As a result, drainage of the cleaning water in the tank (water supply to the toilet) is started.

The drain valve device 110 includes the hollow shaft 1 when the push buttons for large washing and small washing are pressed.
A shift amount adjusting mechanism 148 for selectively selecting the ascending operation length of 14 from short to long is provided. As shown in FIG. 5, the shift amount adjusting mechanism 148 includes a piece 14 that is rotatable in a pendulum shape.
9 and a piece 149 extending from below the large cleaning push button 142.
And a rotation regulating plate 150 that regulates the rotation of the.
The piece 149 is biased in the direction of arrow X in the figure by a spring (not shown), and the tip of the piece is brought into contact with the outer periphery of the hollow shaft 114 on the upper end side. Rotation restriction plate 150
Is urged upward by a spring (not shown), and moves down in response to the pressing operation of the large cleaning pressing button 142. The rotation restricting plate 150 is inserted between the tip of the piece 149 and the outer peripheral wall of the hollow shaft 114 by this lowering operation, and the tip of the piece is held in the hollow shaft 114 while the hollow shaft 114 is moving upward. Keep away from. Thereby, as will be described later, the hollow shaft 11
The lift amount of 4 increases. The rotation restricting plate 150 is
When the small washing pressing button 144 is pressed, it stops at the position shown in the figure, so that the piece 149 receives the spring biasing force and brings the tip of the piece into contact with the outer periphery of the upper end side of the hollow shaft 114 as described above. This reduces the lift amount of the hollow shaft 114, as will be described later.

Next, how the cleaning water in the tank is discharged when the above-mentioned push buttons are operated will be described together with the behavior of the float 122 and the like. FIG. 9 shows the large-cleaning push button 14.
FIG. 9 is an explanatory diagram showing the state of drainage of wash water and the behavior of each member in the first half portion during the large washing in which 2 is pressed.
FIG. 9A is an explanatory diagram showing a state at the time of operating a button, and FIG. 9B is an explanatory diagram showing a state during discharge of cleaning water. FIG. 10 is an explanatory diagram showing how the cleaning water is discharged in the latter half portion of the large cleaning and the behavior of each member. FIG. 10A shows the state near the end of the discharging period, and FIG. 10B shows the cleaning water discharge. It is explanatory drawing which shows the mode at the time of an end. For convenience of explanation, the push button that is the operation target is drawn separately.

When the large washing push button 142 is pressed in the washing standby state shown in FIG. 5 as shown by the arrow La in the figure, the large washing link piece 143 rotates as shown by the arrow La1 and lifts the engaging arm 146. . As a result, the hollow shaft 114 rises as shown by the arrow La2. At this time, since the rotation restricting plate 150 descends as shown by the arrow La3, the tip of the piece 149 does not enter the lift restricting hole 116 of the hollow shaft 114. Therefore, when the large washing push button 142 is operated, the hollow shaft 114 is in the position defined as the rising end, that is, in FIG.
As shown in (a), the float 122 rises to a rising end position where the closing seal 123 is brought into contact with the lower surface of the lid 126. As a result, the through hole 128 becomes the closing seal 12
Blocked by 3. Since the lift restricting holes 116 are formed so as to face each other, the hollow shaft 114 can be assembled even in a state of being rotated by 180 degrees in relation to the lifting operation engaging tool 140.

In this embodiment, the lowering of the rotation restricting plate 150 prevents the front end of the piece from entering the lift restricting hole 116, but the present invention is not limited to this structure. For example, when the large-wash press button 142 is pressed, the rotation restricting plate 150 may be tilted by the button, and the plate may be used to rotate the piece 149 away from the hollow shaft 114.

When the hollow shaft 114 rises in this way, at the same time as this rise, the valve body 112 separates from the valve seat 109 and opens the drain port 108. As a result, drainage of the cleaning water in the tank (water supply to the toilet) is started. Float 12
2 exerts its own buoyancy (float buoyancy) on the valve body 112 and maintains the valve open state of the valve body 112. Even when the valve is closed, the float 122 exerts the float buoyancy on the valve body 1.
12, the valve body 112 is maintained in the valve closed state by the difference between the water head pressure received from the tank cleaning water and the float buoyancy.

On the other hand, since the float 122 constantly presses the closing seal 123 against the lower surface of the lid 126 by its own buoyancy, the closing state of the through hole 128 by the closing seal 123 is maintained. While the valve body is kept open and the through hole is kept closed, the tank cleaning water is continuously drained from the drain port 108, so that the tank water level is lowered.

The water level in the tank is the uppermost end of the sleeve 124,
That is, the water level in the tank is uniformly lowered inside and outside the sleeve until it reaches the upper end of the peripheral wall of the upper water storage section 130. After the water level in the tank has dropped below the upper edge of this surrounding wall, after
In the sleeve 124, the through hole 128 remains closed by the closing seal 123 of the float 122, as shown in FIG. Therefore, air does not flow into the sleeve, the inside of the sleeve remains filled with cleaning water, and the through hole 128 also remains blocked by the float 122 that receives buoyancy. Even during this period, the water level in the tank continues to decrease outside the sleeve (see FIG. 9B).

When the water level in the tank drops to the upper end of the opening of the air inflow hole 134 at the lower end of the sleeve 124 (see FIG. 10).
(See (a)), the air flows from the outside of the sleeve to the inside through the respective air inflow holes 134, and the inside of the sleeve is released to the atmosphere. Therefore, the cleaning water filling the inside of the sleeve is discharged from the drain port 108 as the air flows into the sleeve.
It is drained from inside the sleeve via. Float 122
It descends according to the water surface in the sleeve as the cleaning water in the sleeve drains. In this case, the cleaning water in the sleeve is drained 10
Since the air is discharged all at once from the float 8, the float 122 may be exposed all at once and the float buoyancy may disappear.
Therefore, the valve body 112 descends to the valve seat 109 side to close the drain port 108, and the drain of the wash water in the tank (water supply to the toilet) is completed (see FIG. 10B). In this embodiment,
The opening height of the air inlet holes 134 and the number thereof are adjusted so that about 5.5 liters of the washing water can be discharged before the valve body is closed.

When air flows into the sleeve through the air inflow hole 134 in this manner, the residual cleaning water in the upper water storage section 130 vigorously flows down through the through hole 128 as the atmosphere in the sleeve is released. Since the residual wash water that flows down forcibly pushes the float 122 downward, the float 122 promptly moves together with the inflow of air into the sleeve.
26 Move away from the bottom surface. Therefore, the valve body 112 causes the valve closing operation with good responsiveness, and the responsiveness of the completion of drainage of the washing water in the tank is also enhanced. When the valve body 112 is closed and the drainage is completed, the wash water replenishing device (not shown) is used to wash the wash water tank 10.
0 is supplied with new cleaning water, and the cleaning standby state shown in FIG. 5 is entered.

By the way, if the through hole 128 is not sufficiently closed and there is a gap at the closed portion, air will flow into the sleeve through this gap, and the water level in the tank will change to the air inlet hole 1.
Before reaching 34, the inside of the sleeve is released to the atmosphere. However, in this embodiment, the upper water storage portion 13 above the through hole 128 is used.
Since the wash water is stored in 0, even if there is a gap, the wash water leaks from this gap. While the leakage is occurring, the through hole 128 does not release the atmosphere in the sleeve, and the float 122 can be left floating and the through hole 128 can be kept closed. Therefore, the closing seal 123
It is not necessary to ensure the strict water tightness of the through hole 128 due to the above, and each member does not require high dimensional accuracy or assembly accuracy. Therefore, the management and maintenance of the component processing process and the assembly process become simple, which is beneficial for cost reduction.

Further, in the drain valve device 110, when draining the wash water of a predetermined amount (about 5.5 liters), the wash water is stored in the upper water reservoir 130 and the through hole 128 is closed by the float as described above. You just need to keep up.
Therefore, it suffices to store a tank water amount (about 5.6 liters) slightly exceeding this predetermined water amount. Then, the full water level when the tank water amount is stored may be a water level (about 12.5 cm in this embodiment) slightly exceeding the upper end of the peripheral wall of the upper water storage section 130 as shown in FIG. Therefore, even if the valve body 112 has a large area, the lift force required to open the valve body 112, that is, the lifting force of the hollow shaft 114 when the large cleaning push button 142 is pressed is performed. It can be made small and maintain operability and drainage capacity.

Next, the case where the small washing push button 144 is pushed will be described. FIG. 11 is an explanatory diagram showing the state of drainage of washing water and the behavior of each member in the first half portion of the small washing when the small washing pressing button 144 is pressed, and FIG. 11A shows the state when the button is operated. (B) is an explanatory view showing a state in the middle of discharging the cleaning water. FIG. 12 is an explanatory diagram showing how the cleaning water is discharged in the latter half part of the small cleaning and the behavior of each member. FIG. 12 (a) shows the state near the end of the discharging period, and FIG. 12 (b) shows the cleaning water discharge. It is explanatory drawing which shows the mode at the time of an end.

When the small washing push button 144 is pressed in the washing standby state shown in FIG. 5 as shown by the arrow Lb in the figure, the small washing link piece 145 rotates as shown by the arrow Lb1 and lifts the engaging arm 146. . As a result, the hollow shaft 114 rises as shown by the arrow Lb2. At this time, since the rotation restricting plate 150 is in the same position, the piece 149 presses the tip of the piece against the outer peripheral wall of the hollow shaft 114. In this state, the hollow shaft 114 rises, so that the tip of the piece 149 enters the lift restriction hole 116. For this reason, as shown in FIG. 11A, when the small washing push button 144 is operated, the hollow shaft 114
Rises only up to an intermediate position before (downward in the drawing) the above-mentioned rising end position (see FIG. 9A). In this case, since the float 122 does not reach the lower surface of the lid 126, the through hole 128 remains open.

Although the tip of the piece is inserted into the lift regulating hole 116 by not moving the rotation regulating plate as described above, the invention is not limited to this structure. For example, when the small washing pressing button 144 is pressed, the rotation restricting plate 150 is tilted by the button, and the plate 1
It is also possible to configure 49 to rotate to the side of the hollow shaft 114.

Simultaneously with the rise of the hollow shaft 114, the valve body 112 separates from the valve seat 109 and opens the drain port 108. As a result, drainage of the cleaning water in the tank (supply of water to the toilet) is started, and the valve open state of the valve element 112 is maintained by the float buoyancy, as in the case of large cleaning. This allows
The water level in the tank drops.

In this case, since the through hole 128 is opened, the water level in the tank is similarly lowered inside and outside the sleeve until it reaches the lid 126. That is, the cleaning water stored in the upper water storage section 130 flows down into the sleeve through the through hole 128 as the water level on the outside of the sleeve lowers, and the inside of the sleeve is released to the atmosphere as shown in FIG. 11B. Therefore, even if the water level in the tank is below the lid 126, the water level in the tank is similarly reduced inside and outside the sleeve.

When the water level in the tank is lowered in this way, as shown in FIG.
As shown in FIG. 2 (a), the float 122 is exposed on the surface of the water as the water level decreases, and then descends with the subsequent decrease in the water level. As a result, as described above, the valve body 112 descends together with the hollow shaft 114 to close the drain port 108 (see FIG. 12B), and the flush water drainage (water supply to the toilet bowl) ends. Such closing of the valve may occur before the water level in the tank reaches the air inflow hole 134 of the sleeve 124 because it is sufficient that the shaft is lowered by an amount corresponding to the rise of the valve body when the push button is operated. Therefore, the total amount of drainage in this case is calculated by pressing the large-wash button 142.
Is smaller than the case where the ascending operation is performed to the above-mentioned ascending end position (see FIG. 9A). As a result, the small washing push button 1
At the time of a small flush accompanying the pressing operation of 44, a smaller amount of flush water than that at the time of a large flush can be drained for supplying water to the toilet bowl. In other words, according to the drain valve device 110 of the present embodiment, different amounts of wash water are used for washing water in the washing water tank 1 when washing the large and small water.
Water can be supplied (discharged) from 00 to the toilet bowl.

Next, the toilet body 11 receiving the wash water supply from the wash water tank 100 will be described.
FIG. 13 is an explanatory view for explaining the toilet bowl 10 of the embodiment by breaking the upper surface thereof, and FIG. 14 is an explanatory view showing the toilet bowl 10 of FIG. 13 in a sectional view leftward along the center line in the front-rear direction. FIG. 15 is an explanatory view showing the toilet bowl 10 in a sectional view to the right, and FIG. 16 is an explanatory view for partially cutting away the vicinity of the central portion of the rim shown in FIG.

As shown in these drawings, the rim 14 at the upper edge of the toilet bowl body 11 of the toilet bowl 10 has the toilet bowl portion 1
It is formed so as to surround 2 and has a hollow rim water conduit 16 therein. The rim water conduit 16 is connected to the flush water supply channel 18 on the rear side of the toilet.

The flush water supply passage 18 extends toward the sleeve side of the toilet, and the L-shaped pipe 10 from the drain valve device 110 shown in FIG.
7e (see FIG. 2) is stored. This L-shaped pipe 107e
Is fixed in a watertight manner in the connection hole 19 of the wash water supply passage 18, and introduces the wash water in the tank of the wash water tank 100 into the wash water supply passage 18. The wash water thus supplied to the wash water supply passage 18 enters the rim water guide passage 16 from the left and right directions and is guided around the upper edge of the toilet bowl portion 12, as shown in FIG.

The bowl part 12 of the toilet bowl has a ball bottom part 13.
Is connected to the siphon trap 20. The siphon trap 20 has a trap inlet 22 that opens toward the ball bottom 13 and an ascending pipeline 24 that forms a pipeline from the trap inlet 22 toward the rear of the toilet.
And a top conduit portion 26 that is connected to the upper end of the ascending conduit portion 24 and is curved downward, and a descending conduit portion 28 that is connected to the top conduit portion 26 and that descends. The top pipe line portion 26 is provided with a top weir 30 that is bent toward the descending pipe line portion 28 at a connection portion with the ascending pipe line portion 24, and the sump weir 30 stores the accumulated water RS stored by the toilet bowl portion 12. Specify the water level. The pipe shape of the siphon trap 20 will be described later.

The rim 14 is attached to the rim water conduit 16 as shown in FIG.
On the left side of the toilet shown in FIG. 3, a base first water discharge hole 41, a base second water discharge hole 42, a left center water discharge hole 43, and a left center water discharge hole 43 and a rim front end side water discharge hole 44 are provided. A porous first water discharge hole 45 is provided between them, and a left central water discharge hole 4 is provided.
3 and the base second water discharge hole 42 between the porous water discharge hole 4
Have six. Further, the rim 14 is provided with a right central portion water discharge hole 47 on the right side of the toilet, and between the right central portion water discharge hole 47 and the rim front end side water discharge hole 44, the porous second straightening water discharge hole 4 is formed.
8. A third correction water discharge hole 49 is provided, and a porous fourth correction water discharge hole 50 and an auxiliary water discharge hole 51 are provided between the right central water discharge hole 47 and the connection portion of the wash water supply passage 18.

Base first water discharge hole 41 and base second water discharge hole 42
Is formed on the bottom side of the rim water conduit 16 and has a long hole shape (in the present embodiment, width × length is 12 × 43 mm at the base first water discharge hole 41 and 13 at the base second water discharge hole 42). × 3
5 mm). Auxiliary water discharge hole 46, first correction water discharge hole 45, rim front end side water discharge hole 44, second correction water discharge hole 4
8, third correction water discharge hole 49, right center water discharge hole 47, fourth
The correction water discharge hole 50 and the auxiliary water discharge hole 51 are each formed in a substantially circular hole shape on the bottom side of the rim water conduit 16. In this case, in the present embodiment, the diameter of the water discharge hole is about 4 mm for the auxiliary water discharge hole 46 and the auxiliary water discharge hole 51, about 13 mm for the first correction water discharge hole 45, and the rim front end side water discharge hole 44 and the second water discharge hole 44.
Straightening spout 48 is about 10 mm, third straightening spout 49
And the fourth straightening water discharge hole 50 is about 5 mm, the right center water discharge hole 4
7 is about 16 mm.

The washing water flowing into the rim water conduit 16 has a velocity (flow velocity) depending on the flow rate given by the washing water supply device.
Then, when the water passes through the rim water conduit 16 along the water conduit path and reaches each water discharge hole, it has a directionality according to the position of the water discharge hole around the rim water conduit. Therefore, as shown in FIG. 13, each of the above-described water discharge holes discharges the washing water along the surface of the toilet bowl portion 12 toward the ball bottom portion 13 while reflecting the directionality of the washing water. ..

Left and right raised portions 52 and 53 raised from the bottom of the water conduit are formed in the rim water conduit 16 at substantially the right and left central portions of the toilet bowl. These ridges distinguish the rim water conduit 16 into an expanded water conduit 16a with a wide cross-sectional area on the upstream side and a narrow water conduit 16b with a narrow cross-sectional area on the downstream side with respect to the wash water flow direction. To do. Therefore, the amount of wash water to be flushed is increased in the expanded water conduit 16a, and the wash water that has been rectified by the left and right ridges flows through the narrow water conduit 16b.

When cleaning water is discharged from each of the above-mentioned water discharge holes such as the base first water discharge hole 41, the base first water discharge hole 41 and the base second water discharge hole 42 have a long hole shape. Since it is the water discharge hole in the expanded water guide path 16a and is close to the wash water supply path 18, the discharge amount of the wash water is larger than that of the other water discharge holes. Further, the direction of the discharge cleaning water of the first correction water discharge hole 45, the right center water discharge hole 47, the rim front end side water discharge hole 44, and the second correction water discharge hole 48 is adjusted by the narrow water conduit 16b. The wash water is discharged in a stable state, and the discharge amount at that time depends on the hole diameter.

As shown in FIG. 16, the left central water discharge hole 43 is formed in the left raised portion 52 with a hole diameter of about 16 mm. Matches Therefore, the cleaning water discharged from the left central water discharge hole 43 goes straight through the left central water discharge hole 43 and is guided to the upper peripheral wall 55 of the toilet bowl portion 12 at the lower end of the rim 14 to discharge the water. The locus is as shown by the ejection locus TS in the figure. In this case, the rim 14
Has a drooping plate portion 56 on the side of the toilet bowl portion 12 of the narrow water conduit 16b from the left raised portion 52 to the front side of the toilet bowl, and defines the front region of the left central water discharge hole 43 as the drooping plate portion 56.
It is surrounded by the bottom surface portion 57 and the upper peripheral wall 55 of the narrow water conduit 16b. Therefore, the left central water discharge hole 43 discharges the wash water along the above-described discharge trajectory TS with high directivity and convergence.

Next, the behavior of the wash water when the wash water is discharged from the above-described first base water discharge hole 41 will be described. FIG. 17 shows a base first water discharge hole 41 and a base second water discharge hole 42.
Explanatory diagram for explaining the behavior of the cleaning water discharged from
Reference numeral 8 is an explanatory view for explaining the washing water discharge from the left central water discharge hole 43, the first correction water discharge hole 45, the rim front end side water discharge hole 44, the second correction water discharge hole 48, and the right center water discharge hole 47. Yes, FIG. 18A is an explanatory view for explaining the behavior of the cleaning water when it is assumed that the cleaning water is discharged from each of the water discharge holes independently.
FIG. 18B is an explanatory diagram for explaining the behavior of the wash water caused by the discharge of the wash water from each water discharge hole. FIG. 19 is an explanatory view for schematically explaining the behavior of the wash water caused by the discharge of the wash water from all the water discharge holes, and FIG. 20 shows that each main stream causing the wash water behavior joins the accumulated water RS individually. FIG. 21 is an explanatory diagram for schematically explaining the virtual state, and FIG. 21 is an explanatory diagram for schematically explaining the behavior of the swirling in the stored water when both main flows join the stored water RS at the same time.

Base first water discharge hole 41 and base second water discharge hole 42
As shown in FIG. 13 and FIG. 17, is formed at the rear side of the toilet bowl and opens at the bottom of the expanded water conduit 16a. Therefore, the both water discharge holes discharge the wash water toward the front of the toilet from obliquely above the stored water RS. In this case, both of the water discharge holes are in the shape of long holes,
The cleaning water is discharged in a wide range and spreads more than the long hole shape. Since both the water discharge holes are formed adjacent to each other, the flow of the wash water after the discharge is merged. Therefore, such a merge makes the main flow of the flow having the accurate directionality and the strong water force (the first main flow S1). Is formed, and the first main flow S1 joins the stored water RS. The first mainstream S1 joins the stored water RS from the above-mentioned water discharge hole position and flush water discharge direction from the left back of the toilet to the diagonally right front in a plan view as shown in the drawing. Further, since the first main flow S1 is due to the merging of the wash water flows from both the water discharge holes, the first main flow S1 joins the stored water RS with a stable trajectory. The cleaning water discharged from the both water discharge holes and not involved in the formation of the first main flow S1 is
As a flow on both sides of the main stream S1, it joins the accumulated water RS, and the surface of the toilet bowl portion 12 to which the first main stream S1 does not reach is washed away. The same applies to the cleaning water discharged from the auxiliary water discharge hole 46.

The left central water discharge hole 43 is formed in the rim water conduit 16
The wash water guided to is discharged from the same side as the first base water discharge hole 41 and the second base water discharge hole 42 (specifically, the left side of the toilet bowl). As shown in FIG. 18A, the wash water thus discharged flows along the above-described discharge trajectory TS that circulates along the upper peripheral wall 55 (see FIG. 16). However, along with the discharge of the wash water from the left central water discharge hole 43, the wash water from the first correction water discharge hole 45, the rim front end side water discharge hole 44, the second correction water discharge hole 48, and the right center water discharge hole 47. Discharge is also occurring. The discharge of the wash water from each of these water discharge holes intersects with the discharge trajectory TS of the wash water discharged from the left central water discharge hole 43. Therefore, in the flush water flow on the discharge trajectory TS, on the front side of the toilet bowl, the flush water discharged from the first straightening spout hole 45, the flushing water discharged from the rim front end side spout hole 44, and the second straightening spout hole 48. The discharge cleaning water from and the discharge cleaning water from the third correction water discharge hole 49 join together in sequence. Further, on the right side of the toilet bowl, which is the side opposite to the left central portion spouting hole 43, the flushing water on the discharge locus TS is discharged to the flushing water discharged from the right central portion spouting hole 47 and the fourth correction spouting hole 50. The discharge cleaning water of the above joins.

The merging of the wash water as described above corrects the flow of the rinsing water on the discharge trajectory TS through the merging, and at the same time, the discharge trajectory T
The flow of the wash water of S is merged to form a main flow (second main flow S2) having a precise directionality and a strong water force, and the second main flow S2 is combined with the accumulated water RS. This second mainstream S2 is
As shown in FIG. 18 (b) for the accumulated water RS, the flow of flush water on the discharge trajectory TS around the upper peripheral wall 55 is merged and corrected on the front side of the toilet and the right side of the toilet. In plan view, join the toilet bowl from the right front to the diagonal left rear.
In the second main stream S2, the wash water discharged from the plurality of water discharge holes such as the first correction water discharge hole 45 has been merged and straightened, and thus a stable trajectory is taken to the accumulated water RS. At the time of merging and summing water, as shown in FIG. 18 (b) and FIG.
Adopting a substantially parallel relationship with S in between, a swirling flow in the same rotation direction is generated in the stored water RS by the confluence of both main flows. In addition, in the auxiliary water discharge hole 51 and the fourth water discharge hole 50 for correction on the side of the water discharge hole, the surface of the bowl bowl portion 12 (the surface on the rear side of the toilet bowl) to which the second mainstream S2 does not reach is washed away.

As described above, the first main flow S1 and the second main flow S2 are substantially parallel to the stored water RS in a plan view of the toilet bowl and have a relationship so as to cause a swirling flow in the stored water RS in the same rotation direction. Therefore, in the toilet bowl 10 of the present embodiment, when each main flow causes a swirling flow in the stored water RS, the main flows do not disturb each other in the swirling direction. Therefore, since the swirling flow is not disturbed and the swirling is promoted,
The energy (hydraulic force) of the discharged cleaning water can be used without waste for swirling flow generation, and the efficiency of pushing the accumulated water by the swirling flow can be increased through this.

Next, the structure of the inner wall of the ball portion for causing such main stream merging will be described. FIG. 22 shows the toilet bowl 10 in the vicinity of the confluent of the second main stream S2, which is shown in FIG.
It is explanatory drawing shown in a cross section along line 2-22. This FIG.
As shown in FIGS. 13 to 15, in the toilet bowl 10 of the present embodiment, the inner wall of the toilet bowl side of the toilet bowl on the front side of the toilet bowl is the upper edge peripheral wall 55 below the rim 14 and the sloping slope portion 60 following the upper slope. Then, the inclined portion 61 having a large inclination and the lower end shelf portion 62 with the inclination suppressed are formed, and the lower end shelf portion 62 is positioned near the water surface in the stored water RS. This lower end shelf 62 is the first
The main stream S1 is received to guide the turning and the accumulated water R
As shown in FIG. 20, the swirling condition of the wash water that occurs when the first main flow S1 joins S is set so that the swirling lead S1L of the swirling water RS in the depth direction becomes small.

Further, the inner wall of the toilet bowl portion on the rear side of the toilet bowl is formed as a rearwardly inclined portion 63 which is inclined from the lower side of the rim 14 substantially uniformly with a large inclination. This rear slanted portion 63 is
Trap entrance 22 of the ball bottom 13 below the surface of the accumulated water RS
Has been reached. In addition, the bowl bowl 12
As shown in FIG. 22, the inner wall of the side surface of the toilet bowl of the toilet has left and right inclined portions 64 with a gentle inclination following the upper peripheral wall 55 below the rim 14.
R and 64L, and the left and right inclined portions 65R and 6 that are greatly inclined
It is set to 5L. The inclined portions 64R and 64L are connected to the inclined portion 60 on the front side of the toilet bowl to serve as flush water receiving surfaces for correcting the flow of the second mainstream S2 described above, and are connected to the rear inclined portion 63 on the rear side of the toilet bowl. The inclined portion 64L guides the first mainstream S1 to near the accumulated water RS, but the first mainstream S
Since 1 flows obliquely from the rear to the front, the guide for the combined merging of the first main flow S1 and the subsequent swirling is provided by the lower end shelf 62 as described above.

The inclined portions 65R and 65L are connected to the inclined portion 61 on the front side of the toilet and to the rear inclined portion 63 on the rear side of the toilet. The inclined portion 65R and the rearward inclined portion 63 that follows the inclined portion 65R receive the second mainstream S2 corrected as described above and receive the accumulated water RS.
And the second mainstream S2 after merging is stored water R
The swirl state of the wash water that merges with S is specified. In this case, both the sloped portion 65R and the rear sloped portion 63 have a large slope, and the slopes of the sloped portion 65R and the rear sloped portion 63 are as shown in FIG. Of the accumulated water level Δ
The water surface expansion ΔS is about 1/5 to 2/5 with respect to H, and the expansion ratio of the accumulated water surface area is about 40% or less of the original area when the water level rises. In other words, the second mainstream S2 joins the stored water RS with such a large inclination and is swirled and guided by these inclined portions even after the merged stored water. For this reason, the swirling condition of the wash water that occurs when the second main flow S2 merges with the stored water RS is such that the lead S2L of the swirling of the stored water RS in the depth direction becomes large, as shown in FIG. Become. Since the sloped portion 65R, the rear sloped portion 63, and the sloped portion 65L are curved surfaces, the degree of inclination has been described by comparing the accumulated water level rise ΔH and the expanded reservoir surface area ΔS. In the vertical cross-sectional shape thereof, the angle formed between the accumulated water surface and the cross-section peripheral wall surface of the peripheral wall surface portion may be a steep angle of about 5 to 25 °. By doing this, the second guide provided by each of the above-mentioned inclined parts
The main flow S2 can be a swirling flow of a large reed S2L.

By the way, the swirling flows that occur after the above main streams join are not independent, but simultaneously occur in the stored water. Therefore, it is considered that the following behavior is taken.

As described above, the swirling flow generated by the second main flow S2 in the stored water RS so as to increase the swirling lead is such that the pushing of the stored water RS due to the swirling flows toward the ball bottom 13 side, that is, the trap inlet 22. To do. In addition, as shown in FIG. 21, this pushing also affects the swirl flow having a small swirl lead caused by the first main flow S1, so that the first main flow S1
The swirling dirt and the swirling cleaning water itself that are swirling on the swirling flow of No. 1 are pushed toward the trap inlet 22. For this reason,
It is possible to further improve the pushing performance of the accumulated water RS and filth. Even when such pushing is applied, the swirling flow is not disturbed in the swirling direction.

In addition, since the bowl bottom portion 13 of the toilet bowl portion 12 has a mortar shape, the trap inlet 22
The swirl radii of both swirling flows heading toward each other gradually decrease, and the momentum of the swirling flows increases. Therefore, the pushing performance by the swirling flow is further improved.

When the stored water swirl based on the first main flow S1 and the second main flow S2 described above occurs, the wash water and the dirt in the bowl bowl portion 12 are discharged from the trap inlet 22 to the siphon trap 20.
It enters (is pushed in) and is discharged from the siphon trap 20 as follows. Here, the detailed configuration of the siphon trap 20 will be described prior to the description of the state of filth discharge. FIG. 23 is an explanatory view in which the pipeline is cross-sectionally viewed along the line 23-23 in FIG. 15 for explaining the pipeline configuration of the siphon trap 20, and FIG. 24 shows the descending pipeline section 28 in FIG.
23 is a cross-sectional view taken along the line 24-24 in FIG. 23, and FIG. 25 shows the descending conduit portion 28 in FIG.
FIG. 5 is an explanatory view taken along a line 5-25, and FIG. 26 is an explanatory view taken along a line 26-26 in FIGS. 15 and 23.

The top pipe line portion 26 is continuous with the ascending pipe line portion 24 and extends rearward of the toilet bowl, and flushes wash water from the top weir 30 into the descending pipe line portion 28. In the present embodiment, this top pipe line portion 2
6 has a conduit cross-sectional area larger than that of the ascending conduit portion 24, so that the uppermost portion 70 of the inner wall of the top conduit portion 26 can be air-sealed, as will be described later. .

The top weir 30 has a tongue portion 71 projecting from the side of the descending conduit 28 so as to serve as a guide when the wash water runs over the weir and flows down to the descending conduit 28. Therefore, the wash water that has reached the top weir 30 flows down to the descending conduit portion 28 under the guidance of the tongue portion 71, so that the descending conduit portion 2
8, which will be described later, have an upper conduit shelf 75 and a lower conduit shelf 77.
Reliably reaches, and catches and bounces at these shelves, and flows down to the downstream. Since the tongue portion 71 is curved downward as shown in the drawing, the lower surface region thereof serves as an air reservoir when the cleaning water is discharged.

The descending conduit portion 28 includes a curved conduit portion 72, an intermediate conduit portion 73, and an end conduit portion 74 from the side of the top conduit portion 26.
With. As shown in FIGS. 23 to 26, the descending pipeline 28 connects the curved pipeline 72 and the intermediate pipeline 73 with each other.
The area of the cross section of the conduit is gradually reduced toward the end conduit part 74 and provided. That is, the curved pipe passage portion 72 and the intermediate pipe passage portion 73 are configured such that their cross-sectional areas gradually decrease along the passage direction of the wash water passing through these pipe passage portions, and the state of the gradually changing state is As shown in FIGS. 24 and 25, the toilet is narrowed to the axial center side in the lateral direction of the toilet.

The curved conduit portion 72 is provided with an upper conduit shelf portion 75 at the connecting portion of the intermediate conduit portion 73. The upper pipeline shelf 75 is
The wash water flowing down from the top weir 30 is guided by the tongue portion 71, the wash water bounces off, and the wash water is dropped into the downstream intermediate pipe portion 73.

The intermediate conduit 73 has a lower conduit shelf 77 at the connecting portion of the end conduit 74. This lower conduit shelf 77
Receives the wash water that has flowed down from the tongue portion 71 and the wash water that has passed down the outer peripheral wall portion 76 of the intermediate pipe passage portion 73 from the upper pipe line shelf portion 75, and causes the wash water to bounce off to wash the wash water. It is dropped into the downstream end pipe line portion 74.

The end pipe line portion 74 is so-called slip-in into a drain port (not shown) to connect the descending pipe line portion 28 to this drain port. The terminal pipe line portion 74 is provided with a through hole 78 opened at the lower end leaving the lowermost shelf 80, and the through hole 78 functions as a diaphragm having a narrow opening area. The lowermost shelf 80 is the upper conduit shelf 75 and the lower conduit shelf 7 described above.
The washing water bounced back to the side of the toilet bowl portion 12 at 7 is received to cause the washing water to bounce, and the washing water is guided from the through hole 78 to the drain port.

As described above, since the descending conduit 28 has the upper conduit shelf 75 and the lower conduit shelf 77, the flow rate of the washing water that flows over the top weir 30 and flows down to the descending conduit 28. When the amount is small, it causes catching and rebounding of the washing water in the lower pipeline shelf 77. If the flow rate is large, both the upper pipeline shelf 75 and the lower pipeline shelf 77 receive the washing water and rebound. Wake up. Therefore, regardless of the flow rate of the scavenging wash water, the wash water is received and rebounded at the lowermost shelf 80 of the end pipe line portion 74, and then the wash water is discharged to the drain port. In this case, the positional relationship between the outer peripheral wall portion 76 of the intermediate pipe line portion 73 and the tongue portion 71 of the top weir 30 is the minimum flow rate of the wash water supply device (discharge amount) assumed in this embodiment. (About 40 liters / mi
Even in the case of n), the wash water flowing down from the top weir 30 is surely splashed by the lower pipeline shelf 77. In addition, the conduit area of the intermediate conduit 73 and the end conduit 74
The opening area of 78 in the above is the wash water tank 1 described above.
Even if the water supply flow rate from 00 is the above-mentioned minimum flow rate, it is supposed that the wash water will be stored as will be described later.

The manner in which the waste water is discharged by the descending conduit 28 having such a structure will be described with reference to the behavior of the washing water in the descending conduit 28. FIG. 27 is an explanatory view for explaining the behavior of the cleaning water at the initial stage of cleaning, and FIG. 28 is an explanatory view for explaining the manner in which the cleaning water is stored in the terminal pipe line portion 74.
9 is an explanatory view for explaining the situation of occurrence of siphon action.

When toilet flushing is started through the operation of the large wash push button 142 and the small wash push button 144 described above, the wash water flows from the wash water tank 100 into the rim water conduit 16 and, as described above, 1 main stream S1, 2nd main stream S2
The washing water flows into the accumulated water RS. Then, as shown in FIG. 27, the washing water that has entered the rising pipe portion 24 is pushed into the washing water that has flowed into the accumulated water RS,
The water level in the ascending pipe section 24 rises. Such pushing of the wash water occurs due to the swirling flow based on the merging of the first main flow S1 and the second main flow S2 described above into the stored water RS in substantially the same rotation direction.

The wash water thus pushed in flows down from the ascending pipe line portion 24 to the descending pipe line portion 28 over the top weir 30 of the top pipe line portion 26. As shown in FIG. 28, this cleaning water is received by the upper pipe shelf 75 and the lower pipe shelf 77 of the descending pipe 28, and bounces off. The wash water that bounces off in this way is directed toward the downstream end pipe line 74 in the direction of the flow of the wash water.
To the downstream side, and at that time, there is a flow down of the pipeline accompanied by the entrainment of air in the descending pipeline and a decrease in the flow rate of the wash water due to the change of the flow direction. Reaching the end conduit portion 74. With such wash water behavior,
On the downstream side of the upper pipeline shelf 75, the sealing of the downstream pipeline with the washing water starts as follows.

Since the terminal pipe line portion 74 is provided with the lowermost end shelf portion 80, the cleaning water is further repelled at the lowermost end shelf portion 80, and then the cleaning water is discharged from the through hole 78. In this case, as shown in FIG. 26, since the opening area of the through hole 78 is narrowed, the terminal conduit portion 74 discharges a part of the wash water from the through hole 78, but does not wash the wash water. Pipe part 79
Store it in.

In the present embodiment, even when the wash water is supplied at the above-mentioned minimum flow rate, the flow-down speed is lowered due to the above-mentioned bounce on the shelf when storing the wash water. Therefore, the flow rate of the wash water flowing over the top weir 30 and flowing down to the descending pipeline section 28 is as follows.
It exceeds the flow rate of washing water flowing out to the outlet through 4. Therefore,
At the beginning of cleaning, the storage and storage of the cleaning water in the terminal pipe line portion 74 and the discharge to the drainage port can be performed in parallel. Then, the storage amount of the wash water stored in the terminal pipe line portion 74 increases as the flow of the wash water to the descending pipe line portion 28 is continued. During the continuation of the fall of the wash water, the flow of the wash water that gets over the top weir 30 and flows down into the descending conduit 28 is as shown in FIG.
It acts like a water curtain extending from the tip of the tongue portion 71 of 0 to the upper pipeline shelf 75 or the lower pipeline shelf 77.

[0110] In the initial condition of the cleaning in which the storage and discharge of the cleaning water in the terminal pipe line portion 74 occur, the air remaining downstream from the upper pipe line shelf portion 75 is repelled by the above-mentioned rack portion. And is discharged from the end pipe line portion 74. Then, since the washing water is continuously stored and stored in the terminal pipe line portion 74, the intermediate pipe line portion 73 and the terminal pipe line portion 74 are filled with the washing water and sealed as shown in FIG. 29. As a result, the water column reaching from the terminal pipe line portion 74 to the top weir 30 is formed by continuing the flow of the washing water thereafter, and the inflow of air from the outside of the through hole 78 is prevented by the washing water column. . Even after the water column is formed, the wash water continues to flow down from the top weir 30 to the descending conduit section 28, and the amount of wash water stored and stored in the terminal conduit section 74 increases. The formed water column in the conduit portion 28 is the through hole 78.
Since the washing water is passed by the water head when it falls to, the decompression phenomenon occurs in the trap. Moreover, the ascending pipeline 2
Since the inflow of the wash water that passes through 4 and gets over the top weir 30 and flows into the descending conduit 28 is continued during this depressurization phenomenon, the air from the ascending conduit 24 side is Does not cause suction. Therefore, due to the difference in height of the accumulated water surface of the toilet bowl portion 12 and the height of the terminal conduit portion 74, a so-called siphon action of sucking the wash water of the toilet bowl portion 12 occurs, and until the siphon disappears due to air suction, The siphon action continues. Therefore, the bowl part 1
The waste of No. 2 is forcibly sucked into the siphon trap 20 and discharged together with the accumulated water and the wash water.

By the way, the air remaining in the uppermost portion 70 of the inner wall of the top pipe line portion 26 from the beginning is the uppermost portion 70 of the inner wall.
The air that is still sealed in and has not been discharged from the descending conduit 28 due to the entrainment of the cleaning water described above has already formed a water column in the descending conduit 28, so that the water pillar is raised. It is sealed at the innermost wall 70. Also, air may accumulate on the lower surface of the tongue 71. However, since the washing water is stored and discharged in the terminal pipe line portion 74 and is in a sealed state, the through hole 78 is formed.
Does not cause air ingress from. In addition, the bowl bowl 12
Since there is no air suction on the side of, the water column formed above
Since it is not cut off by the sealing air and the infiltration air, the siphon action generated as described above is continued. Therefore, due to the siphon action, the dirt on the bowl bowl 12 is forcibly sucked into the siphon trap 20 and discharged together with the accumulated water RS.

When the siphon action is generated and continues in this way, the residual air sealed in the uppermost portion 70 of the inner wall of the top conduit 26 is entrained in the suctioned cleaning water and continues with the cleaning water. Expected to be emitted.

By the way, in this embodiment, the descending conduit 28
As shown in FIG. 23 to FIG. 26, the area of the conduit becomes narrower toward the descending side. Therefore, the summit 30
Since the storage and storage of the wash water that has fallen into the descending pipe line portion 28 over the end pipe line portion 74 is promoted, the storage state of the wash water can be more reliably generated. Therefore, it is possible to enhance the reliability of the generation and continuation of the siphon action due to the air discharge and sealing described above. That is, the siphon action ensures the forced suction of dirt and the like, and the waste discharge performance can be improved.

In the present embodiment, the swirling is caused by the first main stream S1 and the second main stream S2 having different swirling leads, so that the pushing efficiency by swirling is enhanced. Therefore, as described above, when the siphon action is generated and continued under the condition that the air remains, the U-shaped pipe is used for the siphon trap 20.
Of the inner wall, for example, near the uppermost part 70 of the inner wall,
It can be confirmed by observing the transition of the liquid level of the U-shaped tube from the start of toilet cleaning. FIG. 30 is an explanatory view showing the installation state of the U-shaped tube for confirming the occurrence and continuation of the siphon action when the air remains, and FIG. 31 is a graph showing the liquid level transition of the U-shaped tube.

As shown in the figure, the liquid level of the U-shaped tube 90 changed to the positive pressure side when the siphon was generated, and then became negative pressure. This can be considered as follows. In other words, in this embodiment, since a small amount of washing water at the beginning of washing seals a part of the descending pipe section, when the washing water is pushed into the siphon trap by pushing by swirling at the beginning of washing, residual air is compressed. Therefore, it can be explained that the pressure in the pipeline increased. The reason why the negative pressure was observed after the positive pressure was generated can be explained by the forced suction of the washing water in the conduit due to the generation of the siphon. Therefore, it is considered that such a toilet bowl that causes the liquid level transition of the U-shaped tube causes the wash water to be pushed in by a strong pushing force in the state where the air remains, and the subsequent siphon action to be generated and continued.

The flush water flow rate used for flushing the toilet bowl is the total flow rate (about 5.5 liters) which is highly effective as a water-saving toilet bowl.
In the case of the above, with the existing toilet bowl that simply causes a swirl of swirling water, the above-mentioned transition status of positive pressure and negative pressure did not appear, and only a negative pressure phenomenon occurred consistently from the beginning of cleaning. .

Next, the effects obtained by the toilet bowl 10 having the above flush water tank 100 will be described. In the present embodiment, since the full water level in the tank described above is about 12.5 cm, the head pressure is about 1 kPa. This head pressure is about 1/2 to 1/3 of the head pressure (about 2.5 kPa) of the existing tank-type siphon trap toilet. Therefore, it is described whether toilet bowl cleaning can be performed without trouble even with such low head pressure.

The comparative toilet bowl is the above-mentioned siphon trap type toilet bowl, which has a siphon trap having a substantially uniform duct area and causes swirling of the accumulated water by discharging flush water to the bowl bowl. Is. As a comparison test, a general fine particle residual number test and PP, which are used to show the ability to discharge filth, are used.
A (polypropylene) ball remaining number test was performed. In this case, in the fine particle residual number test, about 2 particles of about 4.5 mm in particle diameter are used.
Floating on 500 pieces of accumulated water, the toilet bowl was washed in this state.
In this test, if the number of remaining fine particles is 125 or less, it is considered that the waste material can be discharged. In the PP ball remaining number test, 100 PP balls having a particle size of about 19 mm were floated in the accumulated water, and the toilet bowl was washed in this state. In this test, if the number of remaining PP balls is 25 or less, it is considered that the filth can be discharged. With respect to the toilet bowl 10 of the present example and the above-described comparative example toilet bowl, the above test was conducted while changing the total amount of cleaning water (target value).
FIG. 32 is an explanatory diagram for explaining the flow rates of water supply to the bowl portion of the toilet bowl, inflow into the bowl portion, and discharge of flush water from the trap in the toilet bowl compared with the toilet bowl 10 of the present embodiment. [Fig. 4] is an explanatory diagram showing the results of an evaluation test performed on the toilet bowl 10 of the present example and the comparative toilet bowl described above.

As is apparent from FIGS. 32 and 33,
The toilet bowl 10 according to the present embodiment has a flow rate of water supplied to the bowl bowl portion,
Although the flow rate into the ball section and the flush water discharge rate from the trap were smaller than those of the toilet bowl, the results of the evaluation test increased significantly. That is, according to the toilet bowl 10, the cleaning capacity can be remarkably increased by the current total amount of cleaning water (about 5.5 liters), which is said to be highly effective in saving water. This means that in the present embodiment, since the siphon action described above is reliably occurring, a strong filth / reservoir suction force is working, and the first main flow S1 and the second main flow S2 are substantially parallel and rotate in the same direction. It can be said that the swirling flow pushing due to the merging in the direction works with high efficiency. Therefore, according to the toilet bowl of the present embodiment, a high filth discharge capacity can be exhibited. Although the siphon action was observed even in the comparative toilet bowl, the suction force of the siphon action and the pushing efficiency by the swirling flow were not superior to those of the toilet bowl of this embodiment due to the difference in the results in the fine particle residual number test. It was The PP ball remaining number test was omitted because it was confirmed that a high waste discharge capacity could be obtained as described above.

Next, a fine particle residual number test and a PP ball residual number test were carried out for a water amount (5 liters) smaller than the current total amount of washing water. According to the toilet bowl 10 of this example, both were compared. We were able to demonstrate a higher cleaning capacity than a toilet bowl. Also regarding this result, in the present embodiment, since the above-mentioned siphon action is surely occurring, a strong filth / reservoir suction force is working, and the first main stream S1 and the second main stream S1
It can be said that the swirling flow is pushed in at a high efficiency based on the merging of the main flow S2 in substantially parallel and in the same rotation direction.
In particular, PP, which remains in the stored water despite the small amount of wash water supply of 5 liters (substantially about 4 liters) described above.
The number of balls could be reduced. This can be said to be a result of the swirling flow being pushed in with high efficiency based on the merging of the first main flow S1 and the second main flow S2 in substantially parallel and in the same rotation direction.

Next, the pushing efficiency of the swirling flow was compared. That is, the toilet bowl of the example product and the toilet bowl of the comparative example were put in a state without a siphon trap without changing the flush water supply characteristic to the bowl part of the toilet or the accumulated water, and the pushing efficiency of the swirling flow was compared. Instead of the siphon trap, a P pipe having a wall drainage structure was connected to the upper end of the ascending pipeline 24.
FIG. 34 is an explanatory diagram showing the results of comparison between the example product and the comparative example product with respect to the swirling flow pushing efficiency. The comparison test is
A PP ball remaining number test was conducted.

As shown in FIG. 34, the toilet bowl 1 of this embodiment
According to 0, it was possible to exhibit a higher cleaning ability (efficiency of pushing in the PP balls) than the toilet bowl of the comparative example. Also regarding this result, in the present embodiment, the first mainstream S1 and the second mainstream S1
It can be said that the swirling flow is pushed in based on the merging of the two substantially parallel and in the same rotation direction with high efficiency.

In this embodiment, the above high cleaning ability can be exhibited by supplying the cleaning water at a low flow rate and a low head pressure. When the amount of flush water supplied to the toilet bowl was confirmed, the flush water supply rate was about 80 liters / min for the toilet bowl 10 of this embodiment, and about 150 liters / mi for the comparative toilet bowl.
The result was n. At such a low flow rate, the residual air in the siphon trap could not be expelled from the trap line at the beginning of cleaning, so the existing toilet bowl did not adopt a low flow rate and low head pressure. However,
Based on the new idea that all of the residual air in the siphon trap line will not be discharged at the beginning of cleaning, we were able to realize a high capacity with a small flow rate and low head pressure water supply.

As described above, by adopting a peculiar form of water discharge to the peculiar trap line and the bowl part of the toilet, the toilet body 11 of the toilet bowl 10 in this embodiment can be supplied with water at a low head pressure. Even if there is, it is possible to wash the toilet properly. Therefore, the flush water tank 100 of the present embodiment that lowers the full water level to reduce the flush head pressure of flush water supply is not limited to the toilet body 11 described above, and other flush toilets capable of flushing with low flush head water can be used. It can also be suitably applied to a toilet bowl. Further, according to the drain valve device 110 of this embodiment, there are the following advantages.

As described above, in the drain valve device 110,
By maintaining and closing the through hole 128 via the float 122 and releasing it, the valve body 112 is maintained open during large cleaning.
Subsequent valve closing can be performed. Therefore, the flush water drainage and drainage stop can be controlled by the behavior of the float alone, and a valve mechanism other than the float is not required. Therefore, according to the drainage valve device 110 of the present embodiment, the valve structure can be simplified, and the assembling manufacturing work can be simplified and the cost can be reduced.

Next, a modification of the drain valve device 110 described above will be described. FIG. 35 shows a drain valve device 110 of a modified example.
It is an explanatory view showing a section of an important section of A. This modification is different in the configuration in which the valve body 112 is stopped at either the rising end position or the intermediate position in front of it. In the following description, the same reference numerals will be used for the same functions as those in the above embodiment.

As shown in the drawing, the hollow shaft 114 having the valve body 112 at the lower end has a large diameter above the lid 126. The large diameter portion of the hollow shaft 114 is covered with an outer cylinder shaft 114A, and the outer cylinder shaft 114A is
The lower jaw portion 154 supports the stepped portion 155 of the small diameter portion and the large diameter portion of the hollow shaft 114. Therefore, if the outer cylinder shaft 114A is lifted, the outer cylinder shaft 114A
And the hollow shaft 114 rise together. On the other hand, if the hollow shaft 114 is lifted, the hollow shaft 114
Only rises alone. In this case, since the jaw 154 has protrusions (not shown) on its lower surface at an equal pitch, the jaw 1
A gap is formed between the lower surface 54 and the upper surface of the lid 126 so that the through hole 128 is not blocked by the jaw 154.

The drain valve device 110A has a latch mechanism 160 on the upper surface of the lid 126. This latch mechanism 160 is
A latch claw 161 is biased toward the hollow shaft side, and the engagement state of the latch claw 161 and the shafts is different. The latch mechanism 160 includes the outer cylinder shaft 114.
During the lift of A, the latch claw 161 is not engaged with the engagement hole 162 of the outer cylinder shaft 114A and the engagement hole 163 of the hollow shaft 114. Accordingly, when the hollow shaft 114 is lifted together with the outer cylinder shaft 114A, the hollow shaft 114 can be lifted to the rising end position. On the other hand, when the hollow shaft 114 is lifted, the engagement hole 16 of the outer cylindrical shaft 114A is
2 and the engagement hole 163 of the hollow shaft 114 with the latch claw 1
61 is engaged. As a result, the rise of the hollow shaft 114 is restricted, so that when the hollow shaft 114 is lifted, the hollow shaft 114 can be raised to an intermediate position before the rising end position. Accordingly, also with the drainage valve device 110A of the modified example, it is possible to cause the float 122 to block the through hole 128 and to prevent the blockage when the valve body 112 is opened. For this reason, as described above, the drain water 110A of the drain valve device can also drain the wash water in the tank so that the amount of wash water at the time of washing large and small is different.

Here, another modification will be described in which the amount of washing water at the time of large and small washing is made different by setting the raising operation of the valve element 112 to either the raising end position or the intermediate position in front of it as described above. To do. FIG. 36 is an explanatory view schematically showing a sleeve upper end main portion of a drainage valve device 110B of a modified example,
FIG. 37 is a perspective view schematically showing a main part of the upper end of the sleeve of the drain valve device 110B.

As shown in these drawings, the drain valve device 110
B is a lift mechanism 1 for lifting the hollow shaft 114.
70 is provided on the upper end of the sleeve 124, specifically, on the upper surface of the lid 126. The lift mechanism 170 includes columns 171 standing upright from the upper surface of the lid 126 and facing each other, and a large cleaning hinge 172 and a small cleaning hinge 173 are provided between the columns. Both of these hinges are individually swingable around a pin 174 supported at both ends by the support column 171.

As shown in FIG. 37, the hinge 17 for large cleaning is used.
2 is a pressing shaft 17 of a large cleaning pressing button (not shown)
5, a push piece 176 pushed in the direction of the arrow La in the figure,
The lifter piece 177 is connected to the push piece.
The lifter piece 177 extends toward the shaft upper end 114 a of the hollow shaft 114. Then, when the push piece 176 is pushed as indicated by the arrow La, the large cleaning hinge 172 rotates the lifter piece 177 about the pin 174 as shown by the arrow La1 in the figure, and this lifter piece 17 is rotated.
7 is moved away from the shaft upper end 114a.

The small washing hinge 173 is a push piece 179 which is pushed in the direction of the arrow Lb in the drawing by the pressing shaft 178 of a small washing pressing button (not shown), and a column extending from one end of this push piece and on the side of the large washing hinge 172. 171 and an open-loop support arm piece 180 reaching up to 171. The small cleaning hinge 173 is arranged between the columns 171 in a state where the push piece 179 of itself is aligned with the push piece 176 of the large cleaning hinge 172 as shown in the drawing. In this state,
The small wash hinge 173 is supported by the pin 174 together with the large wash hinge 172. Therefore, small washing hinge 1
73, when the push piece 179 is pushed as indicated by the arrow Lb, the support arm piece 180 is moved around the pin 174 as indicated by the arrow Lb in the figure.
Rotate as shown in 1. In this case, the support arm piece 180
Is supported as described above so as not to interfere with the lifter piece 177 of the large cleaning hinge 172, the small cleaning hinge 173 alone rotates as indicated by arrow Lb1.
However, when the large cleaning hinge 172 rotates the lifter piece 177 as described above, the supporting arm piece 180 is lifted from below by the rotating lifter piece 177 and rotates together with the push piece.

The lift mechanism 170 has a lifter piece 181 in order to convert the above-described rotation operation of each hinge piece into a raising operation (lifting operation) of the hollow shaft 114. The lifter piece 181 is fixed to the upper end of the hollow shaft 114 by a fixture (not shown) and extends upward, and has an engaging shaft 182 at the upper end. The engagement shaft 182 is
It enters into the engaging hole 183 of the support arm piece 180. As a result, when the support arm piece 180 rotates as described above,
Since the lifter piece 181 is lifted straight, the hollow shaft 114 moves up.

The lift of the hollow shaft 114 by the lift mechanism 170 having such a configuration is as follows. When the large wash push button is operated, the large wash hinge 172
Rotates the lifter piece 177, lifts the support arm piece 180 from below with the lifter piece 177, and also rotates the support arm piece 180. As a result, the hollow shaft 114 rises via the lifter piece 181. In this case, since the large cleaning hinge 172 moves the lifter piece 177 away from the shaft upper end 114a, the hollow shaft 114
36 rises to a rising end position shown by a chain double-dashed line in FIG. 36, that is, a position where the through hole 128 is closed by the float 122. Therefore, in this case, as in the case of operating the large cleaning push button 142 in FIG. 5, the prescribed amount of cleaning water (about 5.5 liters) can be supplied to the toilet bowl.

On the other hand, when the small washing push button is operated,
The small washing hinge 173 rotates the support arm piece 180 to lift the hollow shaft 114. In this case, the large cleaning hinge 172 uses the lifter piece 177 as the upper end 11 of the shaft.
It remains located above 4a. Therefore, in the hollow shaft 114, the shaft upper end 114a has the lifter piece 1
It only rises to the position where it comes into contact with 77. Therefore, since the hollow shaft 114 stops at the position before the through hole 128 is closed by the float 122, a phenomenon occurs when the small washing push button 144 in FIG. You can supply flush water to the toilet bowl. Therefore, the drain valve device 110B incorporating the lift mechanism 170
Also, the cleaning water in the tank can be drained so that the amount of cleaning water at the time of large and small cleaning differs.

Next, another modification will be described.
FIG. 38 is an explanatory diagram illustrating a drain valve device 110C of another modification. This modification is characterized in that the amount of wash water stored in the upper water storage section 130 can be adjusted.

As shown, the drain valve device 110C is
An outer sleeve 185 is provided on the upper end side of the sleeve 124. The outer cylinder sleeve 185 is attached to the sleeve 124 via a seal ring 186 and slides vertically with respect to the sleeve. Therefore, in the drainage valve device 110C of this modified example, by adjusting the vertical position of the outer cylinder sleeve 185, the amount of flush water stored in the upper water reservoir 130 can be adjusted. Therefore, there are the following advantages. In addition,
In this modified example, the outer cylinder sleeve 185 itself can be the peripheral wall of the upper water storage section 130, so that the lid 126 may be provided on the uppermost end of the sleeve 124 as shown in FIG. 38.

When the inside of the sleeve 124 is filled with cleaning water and the float 122 floats up and closes the through hole 128 by the closing seal 123, as described above, the through hole 128 is insufficiently closed and a gap is formed at the closed position. If there is, leakage of cleaning water from this gap occurs. While the leakage is occurring, the atmosphere in the sleeve is not released by the through hole 128, and the blockage of the through hole 128 via the float 122 can be maintained. Thus, even while the wash water is leaking and the through hole 128 is kept closed, the water level in the tank is lowered as the wash water in the tank is discharged from the drain port 108 (see FIG. 9B). If such a situation continues, the situation where the water level in the tank reaches the air inflow hole 134 and air flows into the sleeve (air inflow situation), and all the residual cleaning water in the upper water storage section 130 leaks and becomes empty. The situation (leakage completion status) appears.

Of these two situations, the air inflow situation occurs at the timing depending on the state of the water level in the tank, and the leakage end situation occurs at the timing depending on the situation of the leakage (leakage water amount, residual wash water amount). The amount of leaked water can be assumed to be constant if there is no change in the above-described gap. Therefore, by adjusting the amount of residual wash water, that is, the amount of stored wash water in the upper water storage section 130, the timing of the leakage end situation can be adjusted.
Specifically, if the amount of stored cleaning water is reduced, the leakage ends in a short time, so the leakage end situation occurs early, and if the amount of cleaning water is large, it occurs late.

For this reason, if the leakage end state is delayed from the air inflow state, air will not enter the sleeve through the through hole 128 before the tank water level reaches the air inflow hole 134. Therefore, it is possible to prevent the valve body 112 from closing the valve body 112 as described above only after the appearance of the air flow-in state through the air inlet hole 134. Therefore, the large cleaning in which the opened valve body 112 is closed. The timing can be made almost constant each time, and the reproducibility of the amount of wash water increases.

Further, if the leakage end condition is made earlier than the air inflow condition, the release of the atmosphere in the sleeve by the inflow of air from the through hole 128 to the inside of the sleeve is ensured before the water level in the tank reaches the air inflow hole 134. Get up. Therefore,
Before the water level in the tank reaches the air inflow hole 134, the valve body can be closed reliably. For this reason, the amount of washing water for small washing can be always smaller than that for large washing, and
Its reproducibility also increases.

Further, there are the following advantages. The time it takes for the water level in the tank to reach the air inflow position below the sleeve and the above-mentioned air inflow condition to occur (water level drop time) is
The length can be adjusted depending on the opening area of 08 and the full water level of the washing water in the tank. However, since the drain port 108 is an opening on the bottom wall of the tank, it is difficult to adjust the opening area. However, in the drainage valve device 110C of this modified example, the leak time until the above-mentioned leak end situation occurs can be easily adjusted in length by a simple adjustment of sliding the outer sleeve 185 up and down. Therefore, according to the drain valve device 110C of this modification, it is possible to easily adjust the length of the water level fall time and the leak time.

The amount of stored cleaning water in the upper water reservoir 130 may be adjusted at the time of factory shipment of the tank device or the toilet or at the time of maintenance and inspection in accordance with the tank full water level. In addition, when the used drain valve device 110C is collected and recycled, the amount of wash water can be adjusted by storing it in a newly installed tank, so that the reusability is enhanced. Also,
Adjustment of the leakage time after adjustment of the storage water volume for storage in the upper water storage section 130 is performed according to the requirements (for example, regulation of flush water volume) of the flush water tank or the toilet to which the drain valve device 110C of this modification is applied. Can be done by Therefore, the versatility of application can be improved.

In order to make it possible to adjust the amount of water stored in the upper water storage section 130 in this way, the following modifications can be made. FIG. 39 is a drain valve device 110 of another modification.
It is explanatory drawing explaining D. As shown in the figure, the drain valve device 110D includes a peripheral wall 130a of the upper water storage section 130.
Is higher than the above. This surrounding wall 130a
Has a plurality of wall surface through-holes 187 arranged at different heights from the lid 126. Alternatively, the surrounding wall 130
A notched groove 188 that is notched vertically is formed in a. The wall surface through holes 187 and the cutout grooves 188 are formed in the peripheral wall 130a at equal pitches (for example, pitches of 45 degrees in the circumferential direction). In the drain valve device 110D, by sliding the outer cylinder sleeve 185 up and down, the wall surface through hole 187 that is not closed and is located at the lowest stage is changed, and the opening length 188a of the cutout groove 188 is changed. . Even in the drain valve device 110D having such a configuration, the upper water reservoir 13
Since the stored wash water amount at 0 can be adjusted, the same effect as that of the drain valve device 110C can be obtained.

Next, another modification will be described. Figure 4
Reference numeral 0 is an explanatory view for explaining a main part of a drainage valve device of another modification. This modification is characterized in that the wash water stored in the upper water storage section 130 can be adjusted to flow down to the outside of the sleeve.

As shown in the figure, in this modification, the peripheral wall 130a surrounding the upper water storage section 130 has wall surface through holes 190 around it at an equal pitch (for example, a pitch of 45 degrees in the circumferential direction). In addition, a band-shaped ring 191 is incorporated in the upper water storage part 130 so as to be in close contact with the inner wall thereof. When the band-shaped ring 191 is assembled, the opening area of the entire wall surface through hole 190 is adjusted by adjusting the height position of the assembly. The opening area of the entire wall surface through-hole 190 can be adjusted by closing some of the wall surface through holes 190 with a plug or the like.

Further, the band-shaped ring 191 can be replaced with a band-shaped ring 192 having a through hole 192a on the periphery thereof. The band-shaped ring 192 has its own through hole 19
The opening area of the entire wall surface through-hole 190 can be adjusted also by the overlapping state of 2a and the wall surface through-hole 190. Although the band-shaped ring 192 has two through holes 192a in the drawing, the number is not limited to this, and the number may be the same as that of the wall surface through holes 190 of the peripheral wall 130a, or the through holes 192a may be horizontally long. And so on. Also, the wall surface through hole 190
Also, regarding the long hole-shaped opening 1 as shown by the chain double-dashed line in the figure,
It may be 90a. Further, the band-shaped ring may be attached to the outer circumference of the peripheral wall 130a.

By adjusting the opening area, it is possible to adjust the flow-down condition of the wash water stored in the upper water storage section 130, and there are the following advantages. Upper water reservoir 130
As shown in FIG. 5 and the like, while waiting for cleaning, the cleaning water in the tank is submerged to store the cleaning water. This upper water storage section 130
Is exposed to the water surface as the water level in the tank lowers, and when the water level in the tank reaches the opening portion of the wall surface through hole 190, when the water level subsequently drops, the cleaning water stored from the upper water storage section 130 to the outside is stored. It flows out from this wall surface through hole 190. Finally, the upper water reservoir 130 stores and stores only the amount determined by the open state of the wall surface through-hole 190. If the opening area of the entire wall surface through-hole 190 is small, this wash water outflow occurs at a small flow rate, and if the area is large, it occurs at a large flow rate, so that the upper water storage section 130 changes from full water to a final storage state. There is a difference in the elapsed time until it becomes. Therefore, the leakage time of the stored cleaning water from the start of cleaning can be adjusted also by such area adjustment, so that the range of adjusting the water level drop time and the leakage time can be widened. In addition, the adjustment of the leakage time through the adjustment of the opening area of the through hole can be performed in accordance with the demand (for example, regulation of flush water volume) of the flush water tank or the toilet to which the drain valve device of this modification is applied. . Therefore, the versatility of application can be improved and the reuse efficiency can be improved.

Next, another modification will be described.
FIG. 41 is an explanatory view for explaining a drain valve device 110E of another modification in a sectional view, and FIG. 42 is a drain valve device 110E.
FIG. 3 is an explanatory diagram illustrating a side view. This modification is characterized in that the opening state of the air inflow hole 134 at the lower end of the sleeve 124 is adjusted.

As shown in the figure, the drain valve device 110E of this modified example has an air inlet hole 134a in the form of a long hole extending vertically and an outer sleeve 185 at the lower portion of the sleeve 124. The air inflow holes 134a are formed at equal pitches around the sleeve, and the upper end position of the opening of each air inflow hole 134a is changed by vertically sliding the outer sleeve 185. That is, the upper end position of the opening of the air inflow hole 134a is defined by the lower end edge 185a of the outer cylinder sleeve 185, and is adjusted by the degree of overlap between the outer cylinder sleeve 185 and the air inflow hole 134a.

By making such adjustments, the air inflow hole 1
The inflow position of air from the outer side of the sleeve to the inner side via 34a can be changed in the sleeve height direction. Therefore, it is possible to adjust the timing of inducing the inflow of air into the sleeve, which is caused by the decrease in the water level in the tank. As described above, the inflow of air causes the buoyancy of the float 122 to be reduced and the valve body 112 to be closed, so that the amount of drainage cleaning water can be adjusted.

Even with such adjustment, the tank device or the toilet bowl may be factory-shipped or maintenance-inspected in accordance with a desired amount of washing water (large amount of washing water). Further, when the used drain valve device is recycled, the timing of inducing air inflow, that is, the amount of flush water in the case of stool can be adjusted in accordance with the newly installed tank, so that the reusability is enhanced. Further, since the position adjustment of the outer cylinder sleeve 185 can be performed according to the demand (wash water volume regulation, etc.) of the wash water tank or the toilet to which the drain valve device 110E of this modified example is applied, the versatility of the application. Can be increased.

Next, another modification will be described. Figure 4
3 is an explanatory view showing a cross-sectional view of a main part of a drainage valve device 110F of another modified example. The drain valve device 110F has a float 122 integrated with a hollow shaft 114, a float floating / sinking region is formed by a sleeve 124, and a lid 1
The structure 26 is similar to that of the above-described embodiment in that it has a through hole 128, and the structure is different in the following points.

As shown, the hollow shaft 114 is
The upper end thereof has a cup portion 202 expanded in a cup shape. The cup portion 202 is located above the lid 126 and is submerged in the cleaning water in the tank in the cleaning standby state shown in the drawing. A central opening portion of the cup portion 202 serves as a cup portion valve seat 204, and a cup portion valve body 206 that opens and closes the cup portion valve seat 204 is disposed on the valve seat. The cup valve body 206 is attached to the lower end of the upper hollow shaft 208, and the cup valve seat 204 is opened by raising the shaft, so that the washing water in the cup part 202 is removed from the hollow shaft 11.
It is discharged to the drain port 108 through the hollow part of No. 4. The upper hollow shaft 208 is engaged with the lift mechanism as described in the previous embodiment and lifted during toilet flushing.

The drainage valve device 110F having such a configuration
In the washing standby state shown in the figure, the valve body 112 is balanced in terms of the balance of the head pressure applied to the valve body 112, the buoyancy of the float 122, and the buoyancy generated by the cup portion 202 under the water.
Is closed. The drain valve device 110F drains (supplies) the wash water for different size wash with different wash water as follows.

When an operation for large cleaning is performed, a lift mechanism (not shown) lifts the upper hollow shaft 208,
The cup portion valve body 206 is opened. As a result, the cleaning water inside the cup portion 202 and the cleaning water in the tank above the upper end of the cup portion are discharged from the drain port 108 through the hollow shaft 114 through the opening of the cup portion valve seat 204. The water level in the tank drops to the top of the cup 202,
In this state, the cup portion is emptied, so that more buoyancy is generated. As a result, the water head pressure decreases and the buoyancy increases due to the decrease in the water level in the tank, and the above balance is lost, and the float 122 floats in the wash water in the sleeve. As a result, the valve element 112 at the lower end of the hollow shaft 114 opens apart from the valve seat 109 of the drain port 108, and the tank cleaning water is directly drained from the drain port 108. Moreover, the float 122 receives the buoyant force of the cup portion 202 in addition to its own buoyant force, and the downward pushing force depending on the pressure difference between the upper and lower surfaces of the valve body 112 also decreases, so that the float 122 floats up to the lower surface of the lid body 126. Then, the through hole 128 is closed. The float 122 thus floated indicates the closed state of the through hole 128, and the water level in the tank is
Hold until 4 and air inflow into the sleeve occurs. Therefore, the valve body 112 closes as described above with the inflow of air into the sleeve, and the total drainage amount at this time is until the water level in the tank reaches the air inflow hole 134.

When the upper hollow shaft 208 is lifted, the hollow shaft 114 may be lifted at the same time so that the cup portion valve body 206 and the valve body 112 are opened. Even in this case, as described above, it is possible to drain the wash water for large-scale washing. Hollow shaft 114
To simultaneously lift the cups, the holding portion that mechanically engages the lifted upper hollow shaft 208 is placed on the cup portion 202.
It should be supported by ribs from the top edge. This way
When the upper hollow shaft 208 is lifted, the hollow shaft 114 is also lifted via the holding portion.

When the operation for small cleaning is performed, the hollow shaft 114 is kept with the cup portion valve body 206 closed.
Is lifted by a lift mechanism (not shown), and the valve body 11
2 opens. At this time, the hollow shaft 114 can be lifted to a rising end position until the float 122 closes the through hole 128, or can be lifted only to an intermediate position before this. First, the case where the through hole is closed by the lift to the rising end position will be described.

In this case, the water level in the tank is lowered as the cleaning water in the tank is discharged from the drain port 108. Since the cup portion valve body 206 is in the valve closed state, the cup portion 202 is exposed on the water surface as the water level is lowered while the washing water is stored inside. Since the degree of exposure increases as the water level decreases, the buoyancy of the cup portion 202 decreases as the water level decreases, and disappears when the cup portion 202 is entirely above the water surface. With such a change (reduction / disappearance) of the buoyancy, the weight of the cup portion 202 and the washing water therein is applied to the float 122 via the hollow shaft 114. Then, the float 122 that has closed the through hole 128.
Is pushed by the weight of the cup portion 202 and the washing water inside, and is separated from the lid 126, and the blockage of the through hole 128 is eliminated.
Therefore, air flows into the sleeve from the through hole 128, so that the inside of the sleeve is released to the atmosphere, and the water level inside the tank similarly drops inside and outside the sleeve. The float 122 is exposed to the water surface and then descends as the water level in the tank decreases. As a result, the valve body 112 descends together with the hollow shaft 114 to close the drain port 108. Such valve closing occurs before the water level in the tank reaches the air inflow hole 134 of the sleeve 124. Therefore, the total amount of drainage in this case is the above-mentioned value in which the water level in the tank reaches the air inflow hole 134 and the valve body is closed. Less than with heavy cleaning. When the valve body 112 is closed, the cup portion 2
02 applies the washing water weight to the valve body 112 via the hollow shaft 114, so that the valve body 112 closes quickly.

When the hollow shaft 114 is only lifted up to the intermediate position, the through hole 128 is not closed, so that the air is released from the through hole 128 to the atmosphere in the sleeve. Therefore, even in this case, as described above, the water level in the tank is equal to the air inflow hole 13
Since it occurs before reaching 4, it is possible to discharge a smaller amount of cleaning water than in the case of a large cleaning.

As a result, the drain valve device 110F of the present modification example.
Also, the cleaning water can be discharged (water supply) so that the amount of cleaning water differs depending on the size of the cleaning. Moreover, this drain valve device 11
Even at 0F, the full water level of the tank can be lowered sufficiently if the cup portion 202 is submerged, so that the operability and drainage capacity can be maintained as in the previous embodiment.

Further, in this modification, the weight of the cup portion 202 itself and the weight of the washing water inside the cup portion 202 are calculated as follows.
After 2 is exposed from the surface of the wash water in the tank,
It is always applied to the float 122 and the valve body 112 as a weight. For this reason, the float that is blocking the through hole
Due to this weight, the water level in the tank separates from the lower surface of the lid body before reaching the air inflow hole 134, and the closed state of the through hole disappears earlier. Therefore, rather than without weight
The total amount of drainage can be reduced. On the other hand, when the shaft is moved up to the intermediate position, the valve element 112 is moved by the weight.
The valve can be closed earlier and the total amount of drainage can be reduced as compared with the case without weight. In other words, even if the drainage is performed with different total drainage, the total drainage can be adjusted to the decreasing side. Further, since the wash water is used for the weight, a dedicated weight or the like is unnecessary, which is advantageous in terms of cost. Moreover, in the cup valve body 206 of the cup 202,
Since the position is the cup portion 202 near the full water level, the hydraulic head pressure applied to the valve body is small, and the valve opening operation is easy.

Next, another modification will be described.
FIG. 44 is an explanatory view showing a cross-sectional view of a main part of a drainage valve device 110G of another modification. As shown in the figure, the drain valve device 110G is provided with the cup valve body 2 of the cup 202.
An upper float 203 is provided at 06, and a wall surface through hole 205 is provided at the peripheral wall of the cup portion. Further, in this modified example, the hollow shaft 114 has a large hollow diameter, so that the cleaning water in the cup portion 202 is promptly drained.
Emitted from.

This drain valve device 110G is designed to balance the hydraulic head pressure applied to the valve body 112, the buoyancy of the float 122, and the buoyancy generated by the cup section 202 under water in the cleaning standby state shown in the figure. Is closed. Further, in the cup portion 202, the cup portion valve body 2
The cup valve body 206 is closed in consideration of the balance between the hydraulic head pressure applied to 06 and the buoyancy of the upper float 203. The drain valve device 110G drains (supply) the wash water for washing large and small with different wash water as follows.

When an operation for small cleaning is performed, a lift mechanism (not shown) lifts the upper hollow shaft 208,
The cup portion valve body 206 is opened. In this case, since the buoyant force of the upper float 203 acts on the upper hollow shaft 208, the upper hollow shaft 208 can be lifted by applying a slight force. By lifting the upper hollow shaft 208, the washing water inside the cup portion 202 and the washing water in the tank above the upper end of the cup portion pass through the hollow shaft 114 through the opening of the valve seat 204 of the cup portion and pass through the drain port 108. Is discharged. In this case, since the hollow shaft 114 has a large-diameter hollow portion, the wash water in the tank is quickly discharged, and the water level in the tank is rapidly lowered.

In a situation where the water level in the tank drops below the upper end of the cup part 202, the cleaning water in the tank around the cup part 202 enters the cup part 202 from the wall surface through hole 205, and as described above, the cup part valve seat 204. Through drainage port 1
It is discharged from 08. That is, until the water level in the tank reaches the wall surface through hole 205, the wash water in the tank above the through hole is discharged. While the water level is being lowered, the valve body 112 remains closed due to the balance of forces described above. On the other hand, in the cup valve body 206, since the upper float 203 descends as the water level in the cup lowers, it approaches the valve seat 204 of the cup and closes it. In this case, the upper and lower valve bodies are both closed, so the washing water in the tank is completely discharged.
The amount of drainage is small.

When an operation for large cleaning is performed, a lift mechanism (not shown) lifts the hollow shaft 114, so that the valve body 11 is kept closed while the cup portion valve body 206 is closed.
2 opens. As a result, the cleaning water in the tank will be drained 1
It is discharged from 08, and the water level in the tank drops. Even in this case, since the opening area of the drain port 108 is large, the cleaning water is discharged at a large flow rate, and the tank water level is rapidly lowered. The float 122 closes the through hole 128 by lifting the shaft.

When the water level in the tank drops near the upper float 203 in the cup 202, the upper float 2
The buoyancy of 03 exceeds the force (water head pressure) suppressing the float, and the cup valve body 206 opens. Therefore, after this, since the cleaning water in the cup is discharged from the valve portion 204 of the cup portion, the water level is lowered inside and outside the tank. When the water level in the cup is lowered to some extent, the upper float 203 is lowered and the cup valve body 206 is closed. In this case, the water level lowers on the outside of the cup as well as the inside of the cup due to the discharge from the wide-diameter drain port 108.
Is exposed to the water surface in the cup and its buoyancy disappears.

The water level in the tank continues to drop and reaches the upper end of the sleeve 124. After that, as in the above-described embodiment, when the water level in the tank is lowered to the air inflow hole 134, air inflow into the sleeve and atmospheric release in the sleeve via the through hole 128 occur, and the valve body 112 is Close the valve. The amount of flush water discharged in this case is such that the water level in the tank is 1
Since it has been reduced to 34, the amount of washing water is larger than that of the above small washing.

As a result, the drain valve device 110G of the present modification example.
Also, the cleaning water can be discharged (water supply) so that the amount of cleaning water differs depending on the size of the cleaning. Moreover, this drain valve device 11
Even at 0 G, the full water level of the tank can be lowered sufficiently if the cup portion 202 is submerged, so that the operability and drainage capacity can be maintained as in the previous embodiment.

Next, other modified examples will be described.
FIG. 45 is an explanatory diagram showing a cross-sectional view of a main part of a drain valve device 110H of another modification. This drain valve device 110H
Is characterized in that the weight amount can be adjusted by adjusting the amount of washing water stored in the cup portion 202 of the hollow shaft 114.

As shown, this drain valve device 110H
Has an inner cylinder sleeve 210 in the cup portion 202. The inner cylinder sleeve 210 moves vertically along the inner peripheral wall of the cup portion 202 in a watertight manner via the seal ring 211. That is, the weight amount can be adjusted by changing the degree of protrusion of the inner cylinder sleeve 210 from the upper end of the cup portion 202.
The valve behavior of the drain valve device 110H is as follows.

When the hollow shaft 114 is lifted to the ascending end position for large cleaning, the through hole 128 is clogged by the float 122 as described above, and the cup portion 202 is closed as the water level in the tank decreases. Expose. After the cup portion 202 is completely exposed in this manner, the weight of the cup portion 202 and the weight of the amount of stored and washed water serve as a weight, and the weight acts as a downward force on the float 122 via the hollow shaft 114. Even if the float 122 is receiving the weight in this way, the float 122 balances the float buoyancy of the float and the weight with the through hole 1.
Although the closed state of 28 is maintained, the force for maintaining this closed state becomes small. Therefore, the seal (closure) in the closing seal 123 is loosened, and the gap at the closed position becomes wider than in the case where there is no weight. For this reason, the amount of leakage of the stored cleaning water in the upper water storage section 130 also increases from this gap, and the above-described leakage time is shortened. As a result, just before the water level in the tank reaches the air inflow hole 134 of the sleeve 124,
The inflow of air into the sleeve from the through hole 128 and the release of air to the atmosphere occur, and the valve body 112 is closed. Therefore, the valve closing timing (drainage end timing) is advanced accordingly, and the amount of drainage of cleaning water during large cleaning can be reduced. The degree of this decrease is specified by adjusting the amount of weight, so the inner cylinder sleeve 210
The amount of drainage during large cleaning can be adjusted by adjusting the degree of protrusion of.

When the hollow shaft 114 is lifted to the intermediate position for a small cleaning, the float 122 is covered with the lid 12.
The cup portion 20 as described above under the condition below 6
A weight of 2 will be applied to the float 122. Therefore, when the water level in the tank changes to be lower than the lower surface of the lid 126, the water level in the sleeve also changes at this water level, so the float 122 is exposed to the water surface, and the float buoyancy decreases.
Along with this, the float 122
The (hollow shaft 114) also descends. In this situation, the above-mentioned weight of the cup portion is applied to the hollow shaft 114, so that the pressing force of the valve body 112 is increased accordingly, and the valve body 1 is pressed.
12 closes quickly. That is, it is possible to reduce the amount of washing water drained even during a small washing, and to use the inner cylinder sleeve 210.
The amount of drainage at the time of small washing can be adjusted by adjusting the protrusion degree (weight adjustment).

The adjustment of the protrusion degree (weight adjustment) of the inner cylinder sleeve 210 is performed by the drainage valve device 11 of this modification.
Demand for wash water tanks and toilets to which 0H is applied (for example,
It can be performed according to the washing water amount regulation, etc.). Therefore, the versatility of application can be improved and the reuse efficiency can be improved.

Next, another modification will be described.
FIG. 46 is an explanatory view showing a cross-sectional view of a main part of a drain valve device 110I of another modification. This drain valve device 110I
Is characterized in that the height position of the cup portion 202 of the hollow shaft 114 can be adjusted.

As shown, this drain valve device 110I
Has a male screw portion 214 on the outer circumference of the hollow shaft 114, and a female screw portion 215 screwed to the male screw portion 214 on the cup portion 202.
Have. By rotating the cup part 202 from side to side,
Change its height position. By changing the height position of the cup portion 202 in this way, the timing at which the cup portion 202 is exposed to the water surface, that is, the timing at which the weight is applied can be adjusted. Therefore, it is possible to change the timing of releasing the atmosphere in the sleeve due to leakage through the gap in the closed state of the through hole 128 and the disappearance timing of the closed state accompanying this. As a result, according to the drain valve device 110I of the modified example, it is possible to provide a new method of adjusting the total drainage amount. Also, this cup portion 20
2 height position adjustment, the drain valve device 110H of this modification
Since it can be performed according to the requirements of the wash water tank or the toilet (for example, regulation of wash water volume), the versatility of application can be improved and the reuse efficiency can be improved.

The one having the cup portion 202 can be modified as follows. That is, it is also possible to form the wall surface through hole as shown in FIG. 40 on the wall surface of the cup portion 202 and adjust the opening state (total opening area) of the cup portion wall surface through hole with the band-shaped ring in FIG. it can. With this configuration, when the water level in the tank is lowered and the cup portion 202 is higher than the water level in the tank, the amount of water per hour (outflow amount) flowing out from the inside of the cup portion 202 to the outside can be adjusted. Therefore, the weight exerted by the cup portion 202 on the hollow shaft 114 and the float 122 changes with the passage of time, and the rate of change can be changed.
For example, if the shielding area of the through hole is small and the total area of the opening is large, the outflow amount per time becomes large and the weight can be quickly reduced. Further, if the shielding area is widened and the total opening area is narrowed, the weight can be gradually reduced. As a result, even with such deformation, it is possible to change the timing of releasing the atmosphere in the sleeve in the closed state of the through hole 128 and the disappearance timing of the closed state due to this, so that it is possible to provide a new method for adjusting the total drainage amount. The opening state (total opening area) of the cup wall wall through-holes in the cup 202 can be adjusted according to the requirements of the wash water tank or the toilet (for example, the wash water amount regulation), so that it can be used for general purposes. The efficiency can be improved and the reuse efficiency can be improved.

Next, a modification of closing the through hole by the float 122 will be described. FIG. 47 is a perspective view schematically showing a main part of a drainage valve device 110K of a modified example in which the through-hole closing state is different. This drain valve device 110K
Is characterized in that a through hole is formed in the lid 126.

As shown, this drain valve device 110K
The cover 126 has through holes 128 and auxiliary through holes 128a formed around the through holes 128 at equal pitches. Through hole 12
8 has a diameter such that the hollow shaft 114 can be disposed through the hollow shaft 114 without play. In the drain valve device 110K having such a configuration, when the float 122 shown by the dotted line in the drawing floats up to the lower surface of the lid 126, both the through hole 128 and the auxiliary through hole 128a are closed by the float 122. After such blockage occurs, after the inflow of air from the lower end of the sleeve occurs, the inflowing air passes through the through hole 128 and the auxiliary through hole 128a to release the atmosphere in the sleeve. As a result, the valve body 112 closes as described above.

The drain valve device 110K of this modification has the following advantages. The auxiliary through hole 128a can be selectively closed with a plug or the like, and the total area of the unclosed auxiliary through hole 128a in the lid 126 can be changed. The unblocked auxiliary through hole 128a becomes a hole that causes the above-described leakage of the stored cleaning water in the upper water storage section 130, and the total area of the unclosed auxiliary through holes affects the leakage degree (leak time).
Therefore, by adjusting the closed state (for example, the closed number or closed area) of the auxiliary through hole 128a, it is possible to easily adjust the length of the water level fall time and the leak time as described above, and thereby the wash water can be adjusted. The amount of drainage can be adjusted, and the reusability and versatility of the drainage valve device can be improved.

In each of the above-mentioned valve devices, the valve body 112 may be designed to be closed reliably by using back pressure. FIG. 48 is an explanatory view showing the valve body 112 as seen from the lower end in a cross-sectional view of the periphery of the valve body 112. As shown in the figure, the flange 114f at the lower end of the hollow shaft 114 has the step portion 1 extending along the lower surface rim.
Having 14 g. The valve body 112 has a notch 112t on the periphery. When the valve body 112 having such a configuration closes as the step portion 114g is lowered, the washing water in the sleeve enters the step portion 114g through its periphery and the notch 112t. Therefore, the valve body 112 is closed under the back pressure from the water (wash water in the sleeve) that has entered the step portion 114g, so that the reliability of the valve closing can be improved.

Next, another embodiment will be described. Figure 4
9 is an explanatory view showing a main part of a drainage valve device 200 of another embodiment in a sectional view. This drainage valve device 200 is characterized in that it causes a delay in lowering the water level inside and outside the sleeve.

As shown in the figure, the drainage valve device 200 is provided with a hollow shaft 114 integrally having a float 122 and a cup portion 202 at the upper end thereof, as in the drainage valve device shown in FIG. The cup portion 202 opens and closes the cup portion valve seat 204 by the cup portion valve body 206.

Sleeve 2 of this drain valve device 200
20 is provided with a partition wall 222 that partitions the inside thereof into upper and lower parts, the upper part of the partition wall being the floating / sinking region of the float 122, and the lower part of the partition wall being the vertically moving region of the valve element 112. Partition wall 222
A small-diameter communication hole 226 that communicates the upper and lower regions is formed in the. The communication hole 226 functions as a throttle that restricts the flow of cleaning water in the sleeve from the upper part of the partition wall to the lower part of the partition wall.

In addition to this, the sleeve 220 has a partition wall 222.
Has a cylindrical projection 224 in the center thereof. This cylindrical protrusion 22
4 guides the vertical movement of the hollow shaft 114. The tip of the cylindrical projection 224 is designed not to touch the float 122 in the illustrated cleaning standby state and when the tank cleaning water is completely discharged. That is, in the cleaning standby state, the valve body 112 is closed on the basis of the balance between the water head pressure applied to the valve body 112, the float 122 buoyancy, and the buoyancy generated by the cup portion 202 under water. The drain valve device 200 drains (supplies) the cleaning water for the large and small cleaning with different cleaning water as follows.

When an operation for large cleaning is performed, a lift mechanism (not shown) lifts the upper hollow shaft 208,
The cup portion valve body 206 is opened. As a result, the cleaning water inside the cup portion 202 and the cleaning water in the tank above the upper end of the cup portion are discharged from the drain port 108 through the hollow shaft 114 through the opening of the cup portion valve seat 204. Since the water level in the tank decreases as the cleaning water is discharged, the head pressure decreases. As a result, the above-mentioned balance is lost, and the float 122 floats in the partition area above the partition wall 222 of the sleeve 220. In this case, float floatation is mechanically restricted when the valve body 112 reaches the lower surface of the partition wall 222. In this state, float 1
The float buoyancy of No. 22 and the buoyancy generated by the cup portion 202, which is submerged while the inside of the cup is empty, are
To maintain the valve body on the lower surface of the partition wall 222. Therefore, the valve body 112 maintains the valve open state.

When the upper hollow shaft 208 is lifted, the hollow shaft 114 may be lifted at the same time so that the cup valve body 206 and the valve body 112 are opened. Even in this case, as described above, it is possible to drain the wash water for large-scale washing. Hollow shaft 114
To simultaneously lift the cups, the holding portion that mechanically engages the lifted upper hollow shaft 208 is placed on the cup portion 202.
It should be supported by ribs from the top edge. This way
When the upper hollow shaft 208 is lifted, the hollow shaft 114 is also lifted via the holding portion.

Since the water level in the tank continues to drop during this valve opening, the cup portion 202 is gradually exposed to the water surface, and the buoyancy of the cup portion 202 decreases. And the cup portion 20
2 is completely exposed to the water surface, the buoyancy of the cup portion disappears, and the inside of the cup portion 202 is empty. Therefore, the weight of the cup itself is used as a weight and the hollow shaft 114 is used.
Through the float 122. Then, the float 122 will receive the weight against the buoyancy of itself. At this point, the tank water level is sleeve 2
Since the float 122 is still submerged because it is higher than 20, the float buoyancy causes the valve body 112
Remains open. This further lowers the water level in the tank.

When the water level in the tank falls below the upper end of the sleeve 220, the water level on the outer side of the sleeve is directly lowered by the drainage from the drain port 108. However, inside the sleeve, the passage of the wash water from the upper partition region to the lower partition region of the partition wall 222 is restricted by the communication hole 226, so the water level in the sleeve is delayed outside the sleeve and drops.

The lowering of the water level inside the sleeve is caused by the communication hole 226.
The water level in the sleeve will decrease quickly if the water flow is large. If the degree of water flow is small, the water level in the sleeve will drop slowly. By the way, since the float 122 gradually exposes to the water surface as the water level inside the sleeve lowers, the float buoyancy decreases. While the buoyancy is reduced, the weight of the cup portion 202 acts on the float 122 as a weight, so that the communication hole 2
The water flow of 26 is accelerated by the weight (cup weight).

After the float 122 is exposed to the water surface, the float 122 lowers as the water level in the sleeve lowers, and the valve body 112 is separated from the lower surface of the partition wall 222 by that amount. The degree of this float drop is also determined by the degree of water flow through the communication hole 226 described above.

Thus, while water is being passed between the upper and lower partition areas, the water level on the outer side of the sleeve is lowered, and if the degree of water flow between the partition areas is small, the wash water remains in the upper partition area. While the valve body 112 is open, all the washing water inside the tank is discharged from the drain port 108.

On the other hand, when a small cleaning operation is performed, the hollow shaft 114 is lifted by a lift mechanism (not shown) while the cup portion valve body 206 is closed, and the valve body 112 opens. By this valve opening, the cleaning water in the tank is discharged from the valve seat 109, so that the water level in the tank is lowered. The cup portion 202 is a cup portion valve body 206.
Since the valve is closed, the weight of the cup portion itself and the weight of the washing water inside the cup are used as weights for the hollow shaft 1
Float 122 via 14. That is, at the time of this small cleaning, a larger weight is applied to the float 122 than in the case of the large cleaning described above.

Therefore, the float 1 is increased by the weight increase.
Since 12 starts to descend at an early timing and closes the valve, the amount of washing water in the small washing can be made smaller than that in the large washing.

Thus, the drainage valve device 20 of this embodiment is
Even with 0, the washing water in the tank can be drained by giving a difference in the total amount of drainage to the large and small washing. And this drain valve device 20
Even if it is 0, the full water level of the wash water in the tank is 2
If it is above 02, wash water drainage with different amounts of water can be executed for large and small washing. Therefore, the full water level is changed to the cup portion 20.
Since it is not necessary to set the position higher than 2 carelessly and the head pressure in the tank can be reduced by that much, operability and drainage capacity can be maintained as described above. In addition, in the cup portion valve body 206 of the cup portion 202, since the position is the cup portion 202 near the full water level, the head pressure applied to the valve body is small and the valve opening operation is easy.

The embodiments of the present invention have been described above.
The present invention is not limited to the above examples and embodiments, and it goes without saying that the present invention can be implemented in various modes without departing from the gist of the present invention.

For example, in the above embodiment, the float 122
Although the case where the above is integrated with the hollow shaft 114 has been described, the following may be applied. FIG. 50 is an explanatory view schematically showing a drain valve device 300 of another modified example.

As shown in the figure, the drainage valve device 300 of this modification has a bottomed cylindrical body 302 which is held and fixed in a tank in an inverted state. Through holes 303 are formed in the bottom of the cylindrical body 302 so as to be arranged at equal intervals on the circumference. The float 304 is incorporated in the tubular body 302, and the float buoyancy is transferred to the valve body 3 by using the buoyancy transmitting member 306.
Multiply by 08. The valve body 308 is rotatably supported by a shaft support member 312 so as to open and close the drainage port 310.

Now, when a valve 308 is lifted by the chain 314 by operating a lever or the like (not shown), the drain port 31
0 opens to discharge the cleaning water in the tank. At the same time, the float 304 floats inside the tubular body 302, reaches the bottomed portion, and closes the through hole 303. This closed state is maintained by the float 304 that receives the float buoyancy. In addition, the float buoyancy is generated by the buoyancy transmitting member 306.
Since it acts on the valve opening side of 08, this valve body valve opening is also maintained.

Now, when the water level in the tank is lowered as the cleaning water is discharged from the drain port 310 and the water level reaches the lower end of the tubular body 302, air flows into the tubular body 302 from this lower end. Then, this inflow air penetrates the through hole 303 and causes the inside of the tubular body 302 to be released to the atmosphere. As a result, the float is lowered, so that the valve body 308 is closed as in the above-described embodiment. Therefore, even with this drain valve device 300, the tank full water level may be set to above the tubular body 302, and the same effect as that of the above-described embodiment can be obtained.

Further, although the drain valve device has been described as the embodiment applied to the toilet and its modification, the application is not limited to the toilet, and the present invention can be applied to a simple shower and various liquid supply / drainage devices. In addition, when applying it to a toilet bowl, it is not limited to a toilet bowl that can store tank wash water at a low head pressure as described above, but a sufficient tank height can be secured to receive wash water supply at a large head pressure. It can also be applied to a toilet bowl. Further, in the drain valve device 110 and the like, the lid 1
Although the upper water storage section 130 is provided above 26,
The uppermost water storage part 130 may not be provided, and the uppermost end of the sleeve may be closed with the lid 126.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a toilet bowl 10 of an embodiment.

FIG. 2 is a front view showing the front of the toilet bowl 10 partially broken away.

FIG. 3 is a side view showing a side surface of the toilet bowl 10 partially broken away.

FIG. 4 is a flush water tank 100 of the toilet bowl 10.
It is an explanatory view for explaining the appearance of the bottom of the.

5 is an explanatory diagram showing the configuration of the drain valve device 110 in a sectional view along line 5-5 in FIG. 1. FIG.

6 is a sectional view taken along line 6-6 of FIG.

7 is a sectional view taken along line 7-7 of FIG.

FIG. 8 is a view showing the float 122 with the inner sleeve 122b.
It is an explanatory view for explaining how to change the internal volume of.

FIG. 9 is an explanatory diagram showing the state of drainage of cleaning water and the behavior of each member in the first half during large cleaning when the large cleaning pressing button 142 is pressed.

FIG. 10 is an explanatory diagram showing how cleaning water is discharged and the behavior of each member in the latter half portion of a large cleaning.

FIG. 11 is an explanatory diagram showing a state of draining cleaning water and a behavior of each member in a first half portion at the time of small cleaning in which a small cleaning pressing button 144 is pressed.

FIG. 12 is an explanatory diagram showing how the cleaning water is discharged and the behavior of each member in the latter half of the small cleaning.

FIG. 13 is an explanatory diagram for explaining the toilet bowl 10 of the embodiment with its upper surface cut away.

FIG. 14 is an explanatory diagram showing the toilet bowl 10 of FIG. 13 in a sectional view leftward along a center line in the front-rear direction.

FIG. 15 is an explanatory diagram showing the toilet bowl 10 in a sectional view to the right.

FIG. 16 is an explanatory view for partially cutting and explaining the vicinity of the central portion of the rim shown in FIG.

FIG. 17 is a first base water discharge hole 41 and a second base water discharge hole 42.
It is explanatory drawing explaining the behavior of the wash water discharged from.

FIG. 18 is an explanatory diagram for explaining washing water discharge from the left central water discharge hole 43, the first correction water discharge hole 45, the rim front end side water discharge hole 44, the second correction water discharge hole 48, and the right center water discharge hole 47. It is a figure.

FIG. 19 is an explanatory diagram for schematically explaining the behavior of cleaning water caused by discharging the cleaning water from all the water discharge holes.

[FIG. 20] Each main stream that causes this wash water behavior is the accumulated water RS
It is explanatory drawing which illustrates typically the mode at the time of merging to each separately.

FIG. 21 is an explanatory diagram schematically illustrating the behavior of swirling in the stored water when both main flows join the stored water RS at the same time.

22 is an explanatory view showing the toilet bowl 10 in a cross-sectional view taken along line 22-22 of FIG. 13, which is near the confluent water of the second main stream S2.

23 is an explanatory diagram showing a cross-sectional view of the pipeline along the line 23-23 in FIG. 15 for explaining the configuration of the pipeline of the siphon trap 20. FIG.

FIG. 24 is a view showing the descending conduit portion 28 of FIG. 15 and FIG.
It is explanatory drawing which carried out the cross-sectional view along the 4-24 line.

FIG. 25 is a view showing the descending conduit portion 28 of FIG.
It is explanatory drawing which carried out sectional view along line 5-25.

FIG. 26 is a view showing the descending conduit portion 28 of FIG. 15 and FIG.
It is explanatory drawing which carried out sectional view along the 6-26 line.

FIG. 27 is an explanatory diagram for explaining the behavior of cleaning water at the initial stage of starting cleaning.

FIG. 28 is an explanatory diagram illustrating a state in which cleaning water is stored and stored in the terminal pipe line portion 74.

FIG. 29 is an explanatory diagram illustrating a situation of occurrence of a siphon action.

FIG. 30 is an explanatory diagram showing a U-tube installation state for confirming the occurrence and continuation of the siphon action under the state of remaining air.

FIG. 31 is a graph showing the liquid level transition of a U-shaped tube.

FIG. 32 is an explanatory diagram for explaining, for the toilet bowl, which is compared with the toilet bowl 10 of the present embodiment, the flow rates of water supply to the bowl portion of the toilet bowl, inflow into the bowl portion, and discharge of flush water from the trap. .

FIG. 33 is an explanatory diagram showing the results of evaluation tests conducted on the toilet bowl 10 of the present example and the comparative toilet bowl.

FIG. 34 is an explanatory diagram showing the results of comparison between the example product and the comparative product regarding the swirling flow pushing efficiency.

FIG. 35 is an explanatory view showing a main part of a drainage valve device 110A of a modified example in a sectional view.

FIG. 36 is an explanatory view schematically showing a sleeve upper end main part of a drainage valve device 110B of a modified example.

FIG. 37 is a perspective view schematically showing a sleeve upper end main portion of the drain valve device 110B.

FIG. 38 is an explanatory diagram illustrating a drain valve device 110C of another modification.

FIG. 39 is an explanatory diagram illustrating a drain valve device 110D according to another modification.

FIG. 40 is an explanatory diagram for explaining a main part of a drainage valve device according to another modification.

FIG. 41 is an explanatory view for explaining a drain valve device 110E of another modification in a sectional view.

FIG. 42 is an explanatory diagram illustrating the drain valve device 110E in a side view.

FIG. 43 is an explanatory view showing a cross-sectional view of a main part of a drainage valve device 110F of another modification.

FIG. 44 is an explanatory view showing a cross-sectional view of a main part of a drainage valve device 110G of another modification.

FIG. 45 is an explanatory view showing a cross-sectional view of a main part of a drain valve device 110H according to another modification.

FIG. 46 is an explanatory view showing a cross-sectional view of a main part of a drain valve device 110I of another modification.

[Fig. 47] Fig. 47 is a perspective view schematically showing a main part of a drainage valve device 110K of a modified example in which a closed state of a through hole is different.

FIG. 48 is an explanatory view showing the valve body 112 as seen in a cross-section around the valve body 112 and seen from the lower end direction.

FIG. 49 is an explanatory view showing a cross-sectional view of a main part of a drainage valve device 200 of another embodiment.

FIG. 50 is an explanatory view schematically showing a drain valve device 300 of another modification.

[Explanation of symbols]

10 ... toilet bowl 11 ... Toilet body 11a ... toilet seat 11b ... toilet lid 12 ... Bowl bowl 13 ... bottom of ball 14 ... rim 16 ... Rim headrace 16a ... Expanded headrace 16b ... Narrow water conduit 18 ... Wash water supply channel 19 ... Connection hole 20 ... Siphon trap 22 ... Trap entrance 24 ... Ascending pipeline 26 ... Top pipe section 28 ... Descending pipe section 30 ... Summit 41 ... Base first water discharge hole 42 ... Base second water discharge hole 43 ... Left central water discharge hole 44 ... front rim water discharge hole 45 ... First straightening water discharge hole 46 ... Auxiliary water discharge hole 47 ... Water discharge hole at right center 48 ... Second straightening water discharge hole 49 ... Third straightening water discharge hole 50 ... Fourth straightening water discharge hole 51 ... Auxiliary water discharge hole 52 ... Left ridge 53 ... right ridge 55 ... Upper edge peripheral wall 56 ... Hanging plate part 57 ... Bottom part 60 ... Inclined part 61 ... Inclined part 62 ... Bottom shelf 63 ... backward slope 64L ... Inclined part 64R ... Inclined part 65L ... Inclined part 65R ... Inclined part 70 ... Top part of inner wall 71 ... tongue 72 ... Curved conduit 73 ... Intermediate conduit 74 ... Terminal conduit 75 ... Upper conduit shelf 76 ... Outer peripheral wall 77 ... Lower conduit shelf 78 ... Through hole 79 ... Pipe section 80 ... Bottom shelf 100 ... Wash water tank 102 ... rear tank part 103 ... bottom wall 104 ... Side tank part 105 ... Bottom wall 106 ... Lid 107 ... Drain valve installation section 107a ... Opening 107b ... Valve seat sleeve 107c ... Fixing tool 107d ... Seal ring 108 ... Drainage port 109 ... valve seat 110, 110A to 110K ... Drainage valve device 112 ... Valve 112t ... notch 114 ... Hollow shaft 114A ... Outer cylinder shaft 114a ... upper end of shaft 114f ... flange 114g ... Step 115 ... Overflow hole 116 ... Lift restriction hole 120 ... Float mechanism 122 ... Float 122a ... Cylindrical body 122b ... inner sleeve 122c ... Seal ring 123 ... Blocking seal 124 ... Sleeve 126 ... Lid 128 ... Through hole 128a ... Auxiliary through hole 129 ... Through-hole protrusion 130 ... Upper water reservoir 130a ... Surrounding wall 132 ... Inner wall ridge 134 ... Air inlet hole 134a ... Air inlet hole 140 ... Lifting action engagement tool 142 ... Large wash push button 143 ... Large cleaning link piece 144 ... Small cleaning push button 145 ... Small wash link piece 146 ... Engaging arm 148 ... Shift amount adjusting mechanism 149 ... piece 150 ... Rotation restriction plate 154 ... jaw 155 ... step 160 ... Latch mechanism 161 ... Latch claw 162 ... engagement hole 163 ... Engagement hole 170 ... Lift mechanism 171 ... Support post 172 ... Large cleaning hinge 173 ... Small washing hinge 174 ... pin 175 ... Pressing shaft 176 ... Push piece 177 ... Lifter piece 178 ... Pressing shaft 179 ... Push piece 180 ... Support arm 181 ... Lifter piece 182 ... Engaging shaft 183 ... Engagement hole 185 ... Outer sleeve 185a ... bottom edge 186 ... Seal ring 187 ... Wall surface through hole 188 ... Notch groove 188a ... Aperture length 190 ... Wall surface through hole 190a ... Opening 191 ... Band-shaped ring 192 ... Band-shaped ring 192a ... through hole 200 ... Drainage valve device 202 ... Cup part 203 ... Upper float 204 ... Cup seat 215 ... Female screw part 205 ... Wall through-hole 206 ... Cup part valve body 208 ... Upper hollow shaft 210 ... Inner cylinder sleeve 211 ... Seal ring 214 ... Male screw part 215 ... Female screw part 220 ... Sleeve 222 ... Partition wall 226 ... Communication hole 224 ... Cylindrical protrusion 300 ... Drainage valve device 302 ... Cylindrical body 303 ... Through hole 304 ... Float 306 ... Buoyancy transmitting member 308 ... Valve 310 ... Drainage port 312 ... Shaft support member 314 ... Chain

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Koichi Ogawa             2-1-1 Nakajima, Kokurakita-ku, Kitakyushu City, Fukuoka Prefecture             No. Totoki Equipment Co., Ltd. (72) Inventor Hiroyuki Tokunaga             2-1-1 Nakajima, Kokurakita-ku, Kitakyushu City, Fukuoka Prefecture             No. Totoki Equipment Co., Ltd. (72) Inventor Takashi Yoshioka             2-1-1 Nakajima, Kokurakita-ku, Kitakyushu City, Fukuoka Prefecture             No. Totoki Equipment Co., Ltd. (72) Inventor Takayuki Otani             2-1-1 Nakajima, Kokurakita-ku, Kitakyushu City, Fukuoka Prefecture             No. Totoki Equipment Co., Ltd. F term (reference) 2D039 AA02 AC03 AD01 BA12 DB00

Claims (20)

[Claims] 1. A drain valve device for draining cleaning water in a tank from a drain port on a bottom wall of a tank, the valve body being in contact with a valve seat around the drain port to open and close the drain port, and the valve body. A lifter that lifts the valve body toward the valve opening side and a float, and the buoyancy of the float is exerted on the lifted valve body to maintain the valve body open, and the valve body is lowered when the water level in the tank is lowered. A float mechanism for closing the valve, the float mechanism comprising: a sleeve that surrounds the float to form a floating region of the float; and a lid that closes an upper end of the sleeve and has a through hole. The hole is closed through the float that floats to the lower surface of the lid by buoyancy, and the closed state of the through hole is maintained at the air inflow position of the lower portion of the sleeve until the air starts to flow from the outer side to the inner side of the sleeve. Drainage valve device, characterized in that the lifting. 2. The drain valve device according to claim 1, wherein the float mechanism is formed in a cylindrical shape on the upper surface side of the lid body so as to surround the through hole, and the cleaning water in a tank is filled with the through hole. Drainage valve device having an upper water storage portion to be stored above the water. 3. The drainage valve device according to claim 2, wherein the lifter includes a shaft having the valve element at a lower end thereof so as to be vertically movable, and the float mechanism is configured such that the shaft penetrates the through hole. So that the sleeve and the upper water storage portion are provided, the float is integrally provided with the shaft around the shaft, and the shaft reaches a closing position where the float reaches the lid body and closes the through hole. Drain valve device that moves up. 4. The drainage valve device according to claim 3, wherein the shaft is selectively movable up and down between the closed position and an intermediate position where the shaft does not reach the lid. 5. The drainage valve device according to claim 2, wherein the upper water storage portion is capable of adjusting a stored water storage amount. 6. The drainage valve device according to claim 5, wherein the upper water storage portion includes a tubular body protruding above the lid body so as to surround the through hole, and the tubular body Drain valve device with adjustable protrusion height. 7. The drain valve device according to claim 6, wherein the tubular body is a first tubular body protruding above the lid body, and a second tubular body incorporated in the first tubular body. A drainage valve device having a tubular body, wherein the second tubular body is vertically slidable with respect to the first tubular body. 8. The drain valve device according to claim 5, wherein the upper water storage portion is a tubular body that protrudes above the lid body so as to surround the through hole, and penetrates a sidewall. By closing the tubular body having holes at different positions from the upper surface of the lid and the side wall through-holes in the tubular body and adjusting the closed state, the tubular body is unclosed at the lowest stage. A drainage valve device having a closing body for changing a side wall through hole located therein. 9. The drainage valve device according to claim 5, wherein the upper water storage portion is a tubular body protruding above the lid body so as to surround the through hole, and the sidewall has a tubular interior and exterior. A drainage valve device comprising: the tubular body having an opening for causing the washing water to flow in the above; and a closing body that changes an opening state of the opening in the tubular body. 10. The drainage valve device according to claim 1, wherein the sleeve is capable of adjusting an inflow position of air from an outer side of the sleeve to an inner side of the sleeve in a sleeve height direction. It is said that the drain valve device. 11. The drainage valve device according to claim 3, wherein the shaft is a hollow shaft which is submerged in the cleaning water in the tank and has the valve element around the lower end side, and is expanded into a cup shape at the upper end. The float mechanism includes the sleeve so that the cup portion is located above the lid of the sleeve, and further, is disposed on the upper end cup portion of the hollow shaft submerged in the washing water in the tank. A drain valve device that is provided and has a cup valve body that opens and closes a hollow hole of the hollow shaft, and a lifter that lifts the cup valve body toward the valve opening side. 12. The drainage valve device according to claim 3, wherein the shaft has a weight above the float mechanism that exerts a downward force on the shaft, and the weight is A drain valve device in which a cup-shaped container having an open upper end is used as cleaning water stored in the container when the container is submerged in the cleaning water in the tank. 13. The drainage valve device according to claim 12, wherein the amount of cleaning water to be stored in the container is adjustable. 14. The drain valve device according to claim 12 or 13, wherein the height of the container is adjustable at a submerged position of the wash water in the tank. 15. The drainage valve device according to claim 12, wherein the container flows out from the inside of the container to the outside when the water level in the tank decreases and the container becomes higher than the water level in the tank. A drain valve device that can adjust the amount of water per unit. 16. A drainage device for draining cleaning water, wherein the tank storing the cleaning water and a drainage port formed on the bottom wall of the tank are opened and closed. A drainage device having a device. 17. A toilet bowl for flushing flushed water, which has been supplied with water, into a bowl bowl portion to wash the toilet bowl, wherein the toilet bowl body has the bowl bowl portion, and the flush water is supplied to the toilet bowl body. With a drainage device. 18. A drain valve device for draining cleaning water in a tank from a drain port on a bottom wall of a tank, comprising: a first valve body that abuts a valve seat around the drain port to open and close the drain port; A hollow shaft having a first valve body on the lower end side and submerged in the wash water in the tank, the upper end having a cup portion having a cup-shaped expansion, and the hollow shaft being movable up and down; A float that is disposed and integrated with the hollow shaft, a sleeve that surrounds the float, and a partition wall that partitions the inside of the sleeve into upper and lower partition regions, and the partition region in the upper portion. Is the floating / sinking area of the float, the lower partitioning area is the vertical movement area of the first valve body, and the partitioning wall has a throttle hole that connects the upper and lower partitioning areas, and is submerged in the wash water in the tank. Before A drainage valve having a second valve body which is disposed in an upper end cup portion of the hollow shaft and which opens and closes a hollow hole of the hollow shaft, and a lifter which lifts the second valve body to a valve opening side. apparatus. 19. A drainage device for draining cleaning water, comprising: a tank for storing cleaning water; and a drainage valve device according to claim 18, which opens and closes a drainage port formed on a bottom wall of the tank. . 20. A toilet bowl for flushing flushed water, which has been supplied with water, into a bowl bowl portion, wherein the toilet bowl body has the bowl bowl portion, and the flush water is supplied to the toilet bowl body. With a drainage device.