Drain valve device, flushing water tank device and flush toilet

Abstract

The present invention provides a drain valve device, a flushing water tank device, and a flushing toilet, which can maintain a relatively high instantaneous flow rate (L / min) of flushing water discharged from the drain outlet during the small flushing mode by changing the descent speed of the float as the water level in the storage tank decreases according to the selected large flushing mode or small flushing mode. The drain valve device (1) of the present invention has a valve body (36), a working shaft (54), a water storage tank (62) and a float (72). During the period from opening the valve body to closing the valve, it can selectively execute either a large washing mode in which the washing water in the water storage tank (12) is supplied from the drain outlet (18) to the toilet (4) with a first washing water volume or a small washing mode in which the washing water in the water storage tank (12) is supplied to the toilet (4) with a second washing water volume less than the first washing water volume. The water storage tank or the float is configured to change the descent speed (v1, v2) of the float as the water level in the water storage tank decreases according to the selected large washing mode or small washing mode.

Description

Technical Field

[0001] This invention relates to a drain valve device, a flushing water tank device, and a flush toilet, and particularly to a drain valve device provided in a flushing water tank device for supplying flushing water to a flush toilet, a flushing water tank device having the drain valve device, and a flush toilet having the flushing water tank device. Background Technology

[0002] Conventionally, as a drain valve device installed in the flushing water tank that supplies flushing water to a toilet, there is a known drain valve device, such as those described in Patent Documents 1 and 2, which has a drain valve that opens or closes the drain outlet of the flushing water tank, and utilizes the buoyancy of a float in the opening or closing action of the drain valve.

[0003] First, the existing drain valve device described in the aforementioned Patent Document 1 includes: a valve body that opens or closes a drain outlet located at the bottom of a washing water tank; a working shaft that opens or closes the valve body by moving up and down; a water storage tank that allows the working shaft to pass through in the up and down direction and stores a portion of the washing water in the washing water tank; and a float disposed in the water storage tank that causes buoyancy to act on the working shaft.

[0004] Furthermore, in the existing drain valve device described in the aforementioned Patent Document 1, since the float is disposed inside the water storage tank, the float does not affect the flow of the washing water outside the water storage tank, and the opening time of the drain valve can be fixed. However, the amount of washing water discharged from the drain outlet of the washing water tank is different for each type of washing.

[0005] Next, the existing drain valve device described in Patent Document 2 above is a so-called ball-type drain valve device that has two floats, a large float for washing and a small float for washing.

[0006] In this drain valve device, by setting the opening time of the drain valve during the large wash to be longer than the opening time of the drain valve during the small wash, the washing water volume during the large wash can be set to be larger than the washing water volume during the small wash.

[0007] Existing technical documents

[0008] Patent documents

[0009] Patent Document 1: Japanese Patent Application Publication No. 2014-185491;

[0010] Patent Document 1: Japanese Patent Application Publication No. 2019-157601. Summary of the Invention

[0011] The problem that the invention aims to solve

[0012] However, in the existing drain valve device described in the aforementioned Patent Document 1, the opening time of the drain valve is set to be fixed during both large and small washes, and the amount of wash water discharged from the drain outlet of the wash water tank is different.

[0013] Therefore, especially during a small wash, the flow rate of the wash water discharged from the drain outlet per unit time (hereinafter referred to as "instantaneous flow rate") (L / min) immediately after the drain valve is opened reaches approximately the same maximum value (the so-called "drainage peak") as during a large wash. However, thereafter, during the period when the drain valve is open, the instantaneous flow rate (L / min) is significantly reduced compared to the large wash. Therefore, maintaining the instantaneous flow rate (L / min) as high as possible while ensuring good washing function has always been a required task.

[0014] Furthermore, in the existing drain valve device described in Patent Document 2 above, by utilizing two floats, a float for large washing and a float for small washing, the opening time of the drain valve is changed during large and small washing respectively. Therefore, the instantaneous flow rate (L / min) of the washing water discharged from the drain outlet during small washing can be maintained at a relatively high level.

[0015] However, there is a problem that the higher the instantaneous flow rate (L / min) of the washing water discharged from the drain outlet, the louder the closing sound produced when the drain valve closes the drain outlet. There is a need to work on the design of the size of the large washing float and the small washing float.

[0016] Therefore, in order to maintain a higher instantaneous flow rate (L / min) of the washing water discharged from the drain during small wash and to reduce the closing sound generated when the drain valve closes the drain, the inventors of this invention focused on changing the descent speed of the float as the water level in the storage tank decreases, depending on whether a large wash mode or a small wash mode is selected.

[0017] This led to the discovery of various ways to change the descent time of the float or the opening time of the valve body according to the washing mode.

[0018] That is, the present invention was made to solve the problems of the aforementioned issues or prior art, and aims to provide a drain valve device, a flushing water tank device, and a flushing toilet, which, by adjusting the descent speed of the float as the water level in the storage tank decreases according to the selected large flushing mode or small flushing mode, can maintain a higher instantaneous flow rate (L / min) of flushing water discharged from the drain outlet during small flushing, and can reduce the closing sound generated when the drain valve closes the drain outlet.

[0019] means for solving problems

[0020] To solve the aforementioned problems, the drain valve device of the present invention is a drain valve device installed in a flushing water tank that supplies flushing water to a toilet. It is characterized by comprising: a valve body that opens or closes a drain outlet located at the bottom of the flushing water tank; a working shaft having the valve body at its lower end, which opens or closes the valve body by moving up and down; a water storage tank that allows the working shaft to pass through in the vertical direction and stores a portion of the flushing water in the flushing water tank, and has an outlet hole for allowing the internal flushing water to flow outwards; and a float disposed within the water storage tank, which causes the buoyancy generated by the flushing water in the water storage tank to act on the working shaft. The working shaft and the valve body are configured such that, if... As the water level in the water tank decreases, the float descends, and the working shaft and valve body descend in conjunction with the float. The valve body closes the drain outlet. During the period from when the valve body opens to when it closes, the drain valve device can selectively execute either a large washing mode, in which the washing water in the water tank is supplied from the drain outlet to the toilet with a first washing water volume, or a small washing mode, in which the washing water in the water tank is supplied to the toilet with a second washing water volume less than the first washing water volume. The water tank or the float is configured to change the descent speed of the float as the water level in the water tank decreases, depending on the selected large washing mode or small washing mode.

[0021] In this invention, which is configured in this way, when the toilet is started to be washed, firstly, based on the selection of either the large washing mode or the small washing mode, the working shaft of the drain valve device is raised, thereby raising the valve body (opening the valve), and the washing water in the washing water tank is supplied to the toilet from the drain outlet.

[0022] Furthermore, the water level in the storage tank decreases depending on the selected large or small wash mode. As the water level decreases, the float in the storage tank descends. Consequently, the working shaft of the drain valve device descends, causing the valve body to descend (closing the valve), stopping the supply of washing water from the storage tank to the toilet, and ending the washing process of the toilet.

[0023] At this time, for the water storage tank or the float, since it is configured to change the descent speed of the float as the water level in the water storage tank decreases according to the selected large or small washing mode, the descent time of the float or the opening time of the valve body can be changed according to the selected washing mode.

[0024] Therefore, even in the small wash mode, which uses less water than the large wash mode, the flow rate (instantaneous flow rate) of the wash water per unit time (L / min) that affects the washing performance can still be maintained at a relatively high level.

[0025] Furthermore, by varying the descent speed of the float as the water level in the reservoir decreases according to the selected large or small wash mode, the closing sound generated when the valve body closes the drain outlet can be reduced.

[0026] In this invention, preferably, the water storage tank is configured such that when the valve body is opened, the total opening area of ​​the outlet hole in the small washing mode is larger than the total opening area of ​​the outlet hole in the large washing mode, and the amount of washing water flowing from the outlet hole to the washing water tank per unit time in the small washing mode is greater than that in the large washing mode.

[0027] In this invention, which is configured in this way, since the water tank is set such that when the valve body is opened, the total opening area of ​​the outlet hole in the small washing mode is greater than that in the large washing mode, the amount of washing water flowing from the outlet hole to the washing water tank per unit time (L / min) (the so-called "drainage speed") is greater in the small washing mode than in the large washing mode. Therefore, the descent speed of the float in the small washing mode is greater than that in the large washing mode.

[0028] Therefore, the descent time of the float or the opening time of the valve body in the small cleaning mode can be shorter than that in the large cleaning mode.

[0029] As a result, by varying the amount of washing water flowing from the outlet hole into the water tank per unit time (L / min) (the so-called "drainage rate") in the water tank according to the selected large or small washing mode, it is possible to change the rate at which the float descends as the water level in the water tank decreases.

[0030] Therefore, even in the smaller wash mode, which uses less water than the larger wash mode, the instantaneous flow rate (L / min) of the wash water, which affects the washing performance, can be maintained at a relatively high level. In addition, the closing sound produced when the valve closes the drain outlet can also be reduced.

[0031] In this invention, preferably, the water storage cylinder includes: a first outlet hole that allows the washing water in the water storage cylinder to flow out to the washing water tank in the large washing mode; and a second outlet hole that allows the washing water in the water storage cylinder to flow out to the washing water tank in the small washing mode. When the valve body is opened, the total opening area of ​​the first outlet hole and the second outlet hole are the same, and the second outlet hole is positioned above the first outlet hole. In the small washing mode, the second washing water volume per unit time from the second outlet hole to the washing water tank is set to be greater than the first washing water volume per unit time from the first outlet hole to the washing water tank in the large washing mode.

[0032] In this invention, when the valve body is opened in the large cleaning mode, the cleaning water in the water storage tank flows out from the first outlet hole to the cleaning water tank, and when the valve body is opened in the small cleaning mode, the cleaning water in the water storage tank flows out from the second outlet hole to the cleaning water tank.

[0033] At this time, even though the total opening area of ​​the first outlet hole and the second outlet hole are the same, since the second outlet hole is located above the first outlet hole, the second washing water volume (L / min) (the so-called "second drainage speed") per unit time of the washing water in the water tank flowing from the first outlet hole to the washing water tank in the large washing mode can be set to be larger than the first washing water volume (L / min) (the so-called "second drainage speed") per unit time of the washing water in the water tank flowing from the second outlet hole to the washing water tank in the small washing mode.

[0034] Therefore, the descent speed of the float in the small cleaning mode is greater than that in the large cleaning mode. Consequently, the descent time of the float or the opening time of the valve body in the small cleaning mode is shorter than that in the large cleaning mode.

[0035] As a result, by varying the amount of washing water flowing from the outlet hole into the washing water tank per unit time (L / min) (the so-called "drainage rate") in the water tank according to the selected large or small washing mode, it is possible to change the rate at which the float descends as the water level in the water tank decreases.

[0036] Therefore, even in the smaller wash mode, which uses less water than the larger wash mode, the instantaneous flow rate (L / min) of the wash water, which affects the washing performance, can be maintained at a relatively high level. In addition, the closing sound produced when the valve closes the drain outlet can also be reduced.

[0037] In this invention, preferably, the outlet hole has a first outlet hole and a second outlet hole, and the water storage cylinder is configured such that, in the large washing mode, the washing water in the water storage cylinder flows out from the first outlet hole to the washing water tank, and in the small washing mode, the washing water in the water storage cylinder flows out from both the first outlet hole and the second outlet hole to the washing water tank.

[0038] In this invention, when the valve body is opened in the large cleaning mode, the cleaning water in the water storage tank flows out from the first outlet hole to the cleaning water tank. In the small cleaning mode, when the valve body is opened, the cleaning water in the water storage tank flows out from both the first outlet hole and the second outlet hole to the cleaning water tank.

[0039] At this time, compared to the first washing water volume (L / min) (the so-called "first drainage speed") of the washing water in the water tank flowing out of the first outlet hole to the washing water tank per unit time in the large washing mode, the second washing water volume (L / min) (the so-called "second drainage speed") of the washing water in the water tank flowing out of both the first outlet hole and the second outlet hole to the washing water tank in the small washing mode can be set to be larger.

[0040] Therefore, the descent speed of the float in the small cleaning mode is greater than that in the large cleaning mode. Consequently, the descent time of the float or the opening time of the valve body in the small cleaning mode is shorter than that in the large cleaning mode.

[0041] As a result, by varying the amount of washing water flowing from the outlet hole into the washing water tank per unit time (L / min) (the so-called "drainage rate") in the water tank according to the selected large or small washing mode, it is possible to change the rate at which the float descends as the water level in the water tank decreases.

[0042] Therefore, even in the smaller wash mode, which uses less water than the larger wash mode, the instantaneous flow rate (L / min) of the wash water, which affects the washing performance, can be maintained at a relatively high level. In addition, the closing sound produced when the valve closes the drain outlet can also be reduced.

[0043] In this invention, preferably, the second outlet hole is disposed above the first outlet hole.

[0044] In this invention, when the valve body is opened in the large cleaning mode, the cleaning water in the water tank flows out only from the first outlet hole to the cleaning water tank. In the small cleaning mode, when the valve body is opened, the cleaning water in the water tank flows out from both the first outlet hole and the second outlet hole to the cleaning water tank.

[0045] At this time, since the second outlet is positioned above the first outlet, the second washing water volume (L / min) (the so-called "second drainage speed") per unit time of the washing water in the water tank flowing out from both the first and second outlets to the washing water tank in the small washing mode can be set to be larger than the first washing water volume (L / min) per unit time of the washing water in the water tank flowing out from both the first and second outlets to the washing water tank in the small washing mode.

[0046] Therefore, the descent speed of the float in the small cleaning mode is greater than that in the large cleaning mode. Consequently, the descent time of the float or the opening time of the valve body in the small cleaning mode is shorter than that in the large cleaning mode.

[0047] As a result, by varying the amount of washing water flowing from the outlet hole into the washing water tank per unit time (L / min) (the so-called "drainage rate") in the water tank according to the selected large or small washing mode, it is possible to change the rate at which the float descends as the water level in the water tank decreases.

[0048] Therefore, even in the smaller wash mode, which uses less water than the larger wash mode, the instantaneous flow rate (L / min) of the wash water, which affects the washing performance, can be maintained at a relatively high level. In addition, the closing sound produced when the valve closes the drain outlet can also be reduced.

[0049] In this invention, preferably, the water storage cylinder has a partition that closes a portion of the outlet hole, such that the total opening area of ​​the outlet hole in the large washing mode is smaller than the total opening area of ​​the outlet hole in the small washing mode.

[0050] In this invention, which is configured in this way, by using a partition to close a portion of the outlet hole of the water reservoir, a portion of the outlet hole can be closed, so that the total opening area of ​​the outlet hole in the large washing mode is smaller than the total opening area of ​​the outlet hole in the small washing mode.

[0051] Therefore, the amount of washing water flowing from the outlet hole into the washing water tank per unit time (L / min) (the so-called "drainage speed") is greater in the large washing mode than in the small washing mode. As a result, the float can descend at a greater speed in the small washing mode than in the large washing mode.

[0052] Therefore, the descent time of the float or the opening time of the valve body in the small cleaning mode can be shorter than that in the large cleaning mode.

[0053] As a result, by varying the amount of washing water flowing from the outlet hole into the washing water tank per unit time (L / min) (the so-called "drainage rate") in the water tank according to the selected large or small washing mode, it is possible to change the rate at which the float descends as the water level in the water tank decreases.

[0054] Therefore, even in the smaller wash mode, which uses less water than the larger wash mode, the instantaneous flow rate (L / min) of the wash water, which affects the washing performance, can be maintained at a relatively high level. In addition, the closing sound produced when the valve closes the drain outlet can also be reduced.

[0055] In this invention, preferably, the partition has a connecting hole that connects the water storage tank to the washing water tank when the outlet hole is closed, and the opening cross-sectional area of ​​the connecting hole is smaller than the opening cross-sectional area of ​​the outlet hole. The partition is configured such that, in the large washing mode, the washing water in the water storage tank flows out of the connecting hole into the washing water tank when the outlet hole is closed, and in the small washing mode, the outlet hole is opened so that the washing water in the water storage tank flows out of the entire outlet hole into the washing water tank.

[0056] In this invention, configured in this way, during the large washing mode, the outflow hole is closed by the partition, thereby allowing the washing water in the water storage tank to flow out from the connecting hole of the partition, which has a smaller cross-sectional area than the outflow hole, into the washing water tank.

[0057] On the other hand, in the small washing mode, the outlet hole is opened by the partition, so that the washing water in the water tank can flow out from the entire outlet hole into the washing water tank.

[0058] Therefore, in the small washing mode, the amount of washing water flowing from the entire outlet hole to the water tank per unit time (L / min) (the so-called "drainage rate") is greater than the amount of washing water flowing from the water tank from the partition to the water tank per unit time (L / min) (the so-called "drainage rate") in the large washing mode.

[0059] Therefore, the descent speed of the float in the small wash mode is greater than that in the large wash mode.

[0060] Therefore, the valve opening time in the small cleaning mode is shorter than that in the large cleaning mode.

[0061] As a result, by varying the amount of washing water flowing from the outlet hole into the water tank per unit time (L / min) (the so-called "drainage rate") in the water tank according to the selected large or small washing mode, it is possible to change the rate at which the float descends as the water level in the water tank decreases.

[0062] Therefore, even in the smaller wash mode, which uses less water than the larger wash mode, the instantaneous flow rate (L / min) of the wash water, which affects the washing performance, can be maintained at a relatively high level. In addition, the closing sound produced when the valve closes the drain outlet can also be reduced.

[0063] Next, the present invention is a washing water tank device equipped with the above-mentioned drain valve device.

[0064] In this invention, which is configured in this way, a washing water tank device with a drain valve can be provided. This washing water tank device changes the descent speed of the float as the water level in the storage tank decreases according to the selected large washing mode or small washing mode, thereby maintaining a higher instantaneous flow rate (L / min) of washing water discharged from the drain outlet during small washing and reducing the closing sound generated when the valve body closes the drain outlet.

[0065] Next, the present invention is a toilet with a washing water tank device as described above.

[0066] In this invention, which is configured in this way, a water-washing toilet can be provided, which includes a water tank device with a drain valve. The water-washing toilet can change the descent speed of the float as the water level in the storage tank decreases according to the selected large wash mode or small wash mode, thereby maintaining a higher instantaneous flow rate (L / min) of the wash water discharged from the drain outlet during small wash, and reducing the closing sound generated when the valve closes the drain outlet.

[0067] Next, the present invention relates to a drain valve device, which is a drain valve device provided in a flushing water tank that supplies flushing water to a toilet. The device is characterized by comprising: a valve body that opens or closes a drain outlet located at the bottom of the flushing water tank; a working shaft having the valve body at its lower end, which opens or closes the valve body by moving up and down; a water storage tank that allows the working shaft to pass through in the vertical direction and stores a portion of the flushing water in the flushing water tank, and having an outlet hole that allows the internal flushing water to flow outwards; and a float disposed within the water storage tank, which causes the buoyancy gained from the flushing water in the water storage tank to act on the working shaft. The working shaft and the valve body are configured such that if the float decreases as the water level in the water storage tank decreases... When the water level drops, the working shaft and the valve body, along with the float, descend in conjunction. The valve body closes the drain outlet. During the period from when the valve body opens to when it closes, the drain valve device can selectively execute either a large-wash mode where the water in the storage tank is supplied to the toilet from the drain outlet with a first amount of water, or a small-wash mode where the water is supplied to the toilet with a second amount of water less than the first amount of water. The water tank or the float is configured such that, in the large-wash mode, the first total outflow of water from the water tank through the outlet to the water tank is greater than, in the small-wash mode, the second total outflow of water from the water tank through the outlet to the water tank.

[0068] In this invention, which is configured in this way, when the toilet is started to be washed, firstly, based on the selection of either the large washing mode or the small washing mode, the working shaft of the drain valve device is raised, thereby raising the valve body (opening the valve), and the washing water in the washing water tank is supplied to the toilet from the drain outlet.

[0069] Furthermore, the water level in the storage tank decreases depending on the selected large or small wash mode. As the water level decreases, the float in the storage tank descends. Consequently, the working shaft of the drain valve device descends, causing the valve body to descend (closing the valve), stopping the supply of washing water from the storage tank to the toilet, and ending the washing process of the toilet.

[0070] At this time, since the first total outflow of the washing water in the storage tank from the outlet to the washing water tank in the large washing mode is greater than the second total outflow of the washing water in the storage tank from the outlet to the washing water tank in the small washing mode, the descent speed of the float in the small washing mode is greater than that in the large washing mode.

[0071] Therefore, the descent time of the float or the opening time of the valve body in the small cleaning mode can be shorter than that in the large cleaning mode.

[0072] As a result, by varying the amount of washing water flowing from the outlet to the water tank per unit time (the so-called "drainage rate") in the water tank according to the selected large or small washing mode, it is possible to change the rate at which the float descends as the water level in the water tank decreases.

[0073] Therefore, even in the smaller wash mode, which uses less water than the larger wash mode, the instantaneous flow rate (L / min) of the wash water, which affects the washing performance, can be maintained at a relatively high level. In addition, the closing sound produced when the valve closes the drain outlet can also be reduced.

[0074] In this invention, preferably, the water storage cylinder comprises: a water storage cylinder body having the aforementioned outlet hole; and a small water tank communicatively connected to the water storage cylinder body, the small water tank comprising: a communicating opening communicating with the water storage cylinder body; and a partition for opening or closing the communicating opening, the partition being configured such that, in the aforementioned large washing mode, the water storage cylinder body is connected to the small water tank by opening the communicating opening, and in the aforementioned small washing mode, the water storage cylinder body is separated from the small water tank by closing the communicating opening.

[0075] In this invention, which is configured in this way, a small water tank that is communicatively connected to the main body of the water tank has a communication opening that communicates with the main body of the water tank; and a partition that opens or closes the communication opening, so that the partition can communicate between the main body of the water tank and the small water tank by opening the communication opening in the large washing mode.

[0076] On the other hand, in the small washing mode, the partition of the small water tank can separate the main body of the water storage cylinder from the small water tank by closing the connecting opening.

[0077] As a result, since the first total outflow of the washing water in the storage tank from the outlet to the washing water tank in the large washing mode is greater than the second total outflow of the washing water in the storage tank from the outlet to the washing water tank in the small washing mode, the descent speed of the float in the small washing mode is greater than that in the large washing mode.

[0078] Therefore, the descent time of the float or the opening time of the valve body in the small cleaning mode can be shorter than that in the large cleaning mode.

[0079] As a result, by varying the amount of washing water flowing from the outlet to the water tank per unit time (the so-called "drainage rate") in the water tank according to the selected large or small washing mode, it is possible to change the rate at which the float descends as the water level in the water tank decreases.

[0080] Therefore, even in the smaller wash mode, which uses less water than the larger wash mode, the instantaneous flow rate (L / min) of the wash water, which affects the washing performance, can be maintained at a relatively high level. In addition, the closing sound produced when the valve closes the drain outlet can also be reduced.

[0081] In this invention, preferably, the partition is configured to be rotatable relative to the connecting opening, rotating in the direction of opening the connecting opening in the large washing mode and rotating in the direction of closing the connecting opening in the small washing mode.

[0082] In the present invention configured in this way, assuming that the partition is not rotated relative to the connecting opening but is slidably (slidably) disposed relative to the connecting opening, when the connecting opening is closed by the partition, the sealing part in contact with the connecting opening is repeatedly slid open or closed relative to the connecting opening, and therefore there is a risk of damage due to wear, etc.

[0083] However, according to the present invention, the partition is rotatably provided relative to the connecting opening, and can rotate in the direction of opening the connecting opening in the large washing mode and in the direction of closing the connecting opening in the small washing mode.

[0084] Therefore, compared to the configuration where the partition slides open or closed relative to the connecting opening, the number of parts can be reduced, and the risk of the partition constantly contacting the connecting opening regardless of the washing mode can be avoided. Thus, the part of the connecting opening in the small water tank that contacts the partition when closed (the sealing part) can reduce the risk of damage caused by wear and other factors.

[0085] In this invention, preferably, the connecting opening is provided with a locking part on its edge and rotatably supports the partition. In the small washing mode, the locking part rotates in the direction that the partition closes the connecting opening and comes into contact with the locking part, thereby restricting the rotation of the partition.

[0086] In this invention, the connecting opening of the small water tank has a locking part provided at its edge and rotatably supporting the partition, so that when the partition rotates in the direction of closing the connecting opening and comes into contact with the locking part in the small washing mode, the locking part can reliably restrict the rotation of the partition.

[0087] Furthermore, in the small washing mode, since the partition and the edge of the connecting opening can reliably contact and seal through the locking part when the partition and the locking part are in contact, the water tightness between the main body of the water tank and the small water tank can be improved.

[0088] Therefore, in the small washing mode, the washing water in the small water tank can be reliably prevented from flowing into the main body of the water storage tank from the connecting opening.

[0089] In this invention, preferably, the partition further includes a water hammer section for storing washing water, and the small water tank further includes an auxiliary outlet hole formed on its bottom surface for allowing the washing water in the small water tank to flow out. When the partition abuts against the locking section, the water hammer section can store washing water and the auxiliary outlet hole of the small water tank is open. If the washing water in the small water tank flows out from the auxiliary outlet hole, the partition rotates in the direction away from the locking section and allows the washing water in the water hammer section to flow out.

[0090] In this invention, the partition has a water hammer section for storing washing water, and the small water tank has an auxiliary outlet hole formed on its bottom surface for allowing the washing water in the small water tank to flow out. Thus, when the partition is in contact with the locking part, the water hammer section can store washing water, and the washing water in the small water tank flows out from the auxiliary outlet hole.

[0091] In addition, the washing water in the small water tank flows out through the auxiliary outlet hole, so that the partition can rotate in the direction away from the locking part, allowing the washing water in the water hammer part to flow out.

[0092] Therefore, by utilizing the changes in water level in the small water tank and the changes in the amount of washing water stored in the water hammer section, a series of rotational actions can be reliably and smoothly performed from the state of the small water tank's connecting opening closed by the partition section to the state of the connecting opening open.

[0093] In this invention, preferably, the partition is configured such that, in its initial position, it is in a state where it does not abut against the locking part, leaving the communication opening open and no washing water is stored in the water hammer part. During standby periods when no washing mode is executed and during the execution of the large washing mode, the partition is maintained in the initial position, thereby closing the auxiliary outlet hole of the small water tank, allowing washing water to be stored in the small water tank. Furthermore, during the execution of the small washing mode, after the partition rotates from the initial position and maintains the state of closing the communication opening by contacting the locking part, if the washing water in the small water tank flows out from the auxiliary outlet hole, the partition rotates towards the initial position while allowing the washing water in the water hammer part to flow out, and then returns to the initial position.

[0094] In this invention, the partition is initially positioned not against the locking part, the connecting opening is open, and no washing water is stored in the water hammer part. During standby when no washing mode is executed and during the execution of the large washing mode, the partition remains in the initial position, thereby closing the auxiliary outlet of the small water tank and allowing washing water to be stored in the small water tank.

[0095] On the other hand, during the execution of the small washing mode, the partition rotates from the initial position and contacts the locking part to maintain the state of closing the communication opening. Afterwards, if the washing water in the small water tank flows out from the auxiliary outlet hole, the partition can rotate from the direction toward the initial position while allowing the washing water in the water hammer part to flow out, and then return to the initial position.

[0096] As a result, by more effectively changing the amount of washing water flowing from the outlet hole into the washing water tank in the reservoir according to the selected large or small washing mode (the so-called "drainage"), it is possible to more effectively change the rate at which the float descends as the water level in the reservoir decreases.

[0097] In this invention, preferably, the upper edge of the main body of the water storage cylinder and the upper edge of the small water tank are coplanar with each other, and when the partition is closed to the connecting opening, the upper end of the partition protrudes upward more than the upper edge of the connecting opening or the upper edge of the small water tank.

[0098] In this invention, since the upper edge of the main body of the water storage cylinder and the upper edge of the small water tank are coplanar, and the upper end of the partition protrudes further upward than the upper edge of the connecting opening and the upper edge of the small water tank when the partition closes the connecting opening of the small water tank, the inflow from the small water tank into the main body of the water storage cylinder can be reliably suppressed.

[0099] Furthermore, the present invention is a washing water tank device equipped with the above-mentioned drain valve device.

[0100] In this invention, which is configured in this way, a washing water tank device equipped with a drain valve can be provided. This washing water tank device changes the amount of washing water flowing from the outlet hole into the washing water tank in the water storage tank (so-called "drainage speed") according to the selected large washing mode or small washing mode. This allows for changing the descent speed of the float as the water level in the water storage tank decreases, thereby maintaining a higher instantaneous flow rate (L / min) of washing water discharged from the drain outlet during small washing and reducing the closing sound generated when the valve body closes the drain outlet.

[0101] Furthermore, the present invention is a toilet with a washing water tank device as described above.

[0102] In this invention, a flush toilet is provided that includes a flush water tank with a drain valve. By varying the amount of flush water flowing from the reservoir to the flush water tank (so-called "drainage speed") according to the selected large or small flush mode, the flush toilet changes the descent speed of the float as the water level in the reservoir decreases. This allows for a higher maintenance of the instantaneous flow rate (L / min) of flush water discharged from the drain during small flush mode, and also reduces the closing sound generated when the valve closes the drain.

[0103] Next, the present invention relates to a drain valve device, which is a drain valve device provided in a flushing water tank that supplies flushing water to a toilet. The device is characterized by comprising: a valve body that opens or closes a drain outlet located at the bottom of the flushing water tank; a working shaft having the valve body at its lower end, which opens or closes the valve body by moving up and down; a water storage tank that allows the working shaft to pass through in the vertical direction and stores a portion of the flushing water in the flushing water tank, and has an outlet hole for allowing the internal flushing water to flow outwards; and a float disposed within the water storage tank, which causes the buoyancy obtained by the flushing water in the water storage tank to act on the working shaft. The shaft and the valve body are configured such that if the float descends as the water level in the water tank decreases, the working shaft and the valve body descend in conjunction with the float, and the valve body closes the drain outlet. During the period from when the valve body opens to when it closes, the drain valve device can selectively execute either a large washing mode in which the washing water in the water tank is supplied from the drain outlet to the toilet with a first washing water volume, or a small washing mode in which the washing water in the water tank is supplied to the toilet with a second washing water volume less than the first washing water volume. The float is configured such that the buoyancy obtained in the small washing mode is smaller than the buoyancy obtained in the large washing mode.

[0104] In this invention, which is configured in this way, when the toilet is started to be washed, firstly, based on the selection of either the large washing mode or the small washing mode, the working shaft of the drain valve device is raised, thereby raising the valve body (opening the valve), and the washing water in the washing water tank is supplied to the toilet from the drain outlet.

[0105] Then, the water level in the reservoir decreases depending on the selected large or small wash mode, and as the water level decreases, the float in the reservoir descends.

[0106] As a result, the working shaft of the drain valve device descends, causing the valve body to descend (closing the valve), stopping the supply of cleaning water from the water storage tank to the toilet, and ending the cleaning process of the toilet.

[0107] At this time, since the buoyancy obtained by the float in the small washing mode is smaller than that obtained in the large washing mode, the descent time of the float in the small washing mode is shorter than that in the large washing mode.

[0108] Therefore, the descent time of the float or the opening time of the valve body in the small cleaning mode can be shorter than that in the large cleaning mode.

[0109] As a result, by changing the buoyancy acting on the float according to the selected large or small washing mode, the balance position of the water level in the water tank and the float can be changed when the washing water in the water tank flows out of the outlet hole to the washing water tank, and the descent time of the float as the water level in the water tank decreases can be changed.

[0110] Therefore, even in the smaller wash mode, which uses less water than the larger wash mode, the flow rate of wash water per unit time (hereinafter referred to as "instantaneous flow rate") (L / min) that affects the washing performance can be maintained at a relatively high level. In addition, the closing sound generated when the valve body closes the drain outlet can also be reduced.

[0111] In this invention, preferably, the float has a storage section for storing washing water in a portion thereof, the storage section being configured such that the amount of washing water stored in the small washing mode is greater than the amount of washing water stored in the large washing mode.

[0112] In this invention, since the float has a storage section for storing washing water in a portion thereof, the amount of washing water stored in the small washing mode can be greater than the amount of washing water stored in the large washing mode.

[0113] Therefore, the weight of the storage section in the small cleaning mode is greater than that in the large cleaning mode, so the buoyancy obtained by the float in the small cleaning mode is less than that obtained in the large cleaning mode.

[0114] Therefore, the descent time of the float in the small cleaning mode is shorter than that in the large cleaning mode.

[0115] Therefore, the descent time of the float or the opening time of the valve body in the small cleaning mode can be shorter than that in the large cleaning mode.

[0116] As a result, by changing the buoyancy acting on the float according to the selected large or small washing mode, the balance position of the water level in the water tank and the float can be changed when the washing water in the water tank flows out of the outlet hole into the water tank, and the descent time of the float as the water level in the water tank decreases can be changed.

[0117] Therefore, even in the smaller wash mode, which uses less water than the larger wash mode, the instantaneous flow rate (L / min) of the wash water, which affects the washing performance, can be maintained at a relatively high level. In addition, the closing sound produced when the valve closes the drain outlet can also be reduced.

[0118] In this invention, preferably, the storage section includes: a peripheral wall portion disposed on the upper part of the float, surrounding a portion of the upper part of the float to store washing water; and a partition portion configured to open or close an outlet formed on a portion of the peripheral wall portion.

[0119] The aforementioned partition is configured such that, in the large cleaning mode, the washing water in the storage section can flow out from the outlet of the peripheral wall section by opening the outlet, and in the small cleaning mode, the storage section becomes a water hammer by maintaining the outlet of the peripheral wall section closed and storing washing water in the storage section.

[0120] In this invention, when the large cleaning mode is executed, the partition can open the outlet of the peripheral wall of the storage section located at the top of the float. As a result, the cleaning water in the storage section flows out from the outlet, and no cleaning water is stored in the storage section at the top of the float. Therefore, the buoyancy of the float can be set to be larger.

[0121] On the other hand, when the small cleaning mode is executed, the outlet of the peripheral wall is closed by the partition, so the cleaning water in the storage section cannot flow out from the outlet, and the cleaning water is stored in the storage section above the float. The storage section itself functions as a water hammer.

[0122] Therefore, the buoyancy of the float in the small cleaning mode can be set to be smaller than that in the large cleaning mode.

[0123] As a result, by changing the buoyancy acting on the float according to the selected large or small wash mode, the descent time of the float or the opening time of the valve body can be reliably switched.

[0124] Furthermore, since the valve opening time is not affected by manufacturing errors of the flushing water tank device or the toilet to which the drain valve device is applicable, appropriate flushing can also be performed.

[0125] In this invention, preferably, the float comprises: a peripheral wall portion disposed at the lower part of the float and surrounding a portion of the lower part of the float to store washing water; a communication port formed in a portion of the peripheral wall portion to communicate between the inside and outside of the float; and a partition portion configured to open or close the communication port, wherein the partition portion is configured such that, in the large washing mode, the communication between the inside and outside of the float is restricted by closing the communication port of the peripheral wall portion, and in the small washing mode, the communication between the inside and outside of the float is enabled by opening the communication port of the peripheral wall portion.

[0126] In this invention, when the large cleaning mode is performed, the communication port of the peripheral wall portion at the lower part of the float is closed by the partition, thereby restricting the communication of cleaning water or air inside and outside the float. Therefore, the buoyancy of the float can be set to be larger by the air trapped inside the float.

[0127] On the other hand, when the small cleaning mode is executed, the connecting port of the peripheral wall is opened through the partition, so that the cleaning water or air inside and outside the float can be connected.

[0128] As a result, a portion of the air inside the float is discharged from the communication port of the peripheral wall to the outside of the float, and inside the float, a portion of the washing water on the outside of the float can flow into the lower region inside the float in an amount corresponding to the volume of the discharged air.

[0129] Therefore, the volume occupied by air inside the float is smaller in the small cleaning mode than in the large cleaning mode, thus allowing the buoyancy of the float to be set smaller in the small cleaning mode than in the large cleaning mode.

[0130] As a result, by changing the buoyancy acting on the float according to the selected large or small wash mode, the descent time of the float or the opening time of the valve body can be reliably switched.

[0131] Furthermore, since the valve opening time is not affected by manufacturing errors of the flushing water tank or toilet to which the drain valve device is applicable, proper flushing can be performed even with the applicable toilet.

[0132] In this invention, preferably, the float is formed into a generally cylindrical shape with an open bottom by having a top part that closes the upper region of the peripheral wall and a lower opening formed along the lower edge of the peripheral wall, and the communication port is provided at a height position between the top part and the lower opening.

[0133] In this invention, which is configured in this way, when the connecting opening of the peripheral wall of the float is closed in the large cleaning mode, the external cleaning water of the float is prevented from flowing into the float from the lower opening by filling the float with air.

[0134] On the other hand, when the partition is in the small cleaning mode with the communication port of the float's peripheral wall open, by allowing a portion of the air inside the float to be discharged from the communication port, the cleaning water outside the float can flow from the lower opening and / or communication port to near the height of the communication port inside the float. Therefore, the buoyancy acting on the float in the small cleaning mode is smaller than the buoyancy acting on the float in the large cleaning mode.

[0135] As a result, by changing the buoyancy acting on the float according to the selected large or small wash mode, the descent time of the float or the opening time of the valve body can be reliably switched.

[0136] Furthermore, since the valve opening time is not affected by manufacturing errors of the flushing water tank or toilet to which the drain valve device is applicable, proper flushing can be performed even with the applicable toilet.

[0137] Next, the present invention relates to a drain valve device, which is a drain valve device installed in a flushing water tank that supplies flushing water to a toilet. The device is characterized by comprising: a valve body that opens or closes a drain outlet located at the bottom of the flushing water tank; a working shaft having the valve body at its lower end, which opens or closes the valve body by moving up and down; and a float connected to the working shaft, which causes buoyancy from the flushing water in the flushing water tank to act on the working shaft. The working shaft and the valve body are configured such that if the float decreases as the water level in the flushing water tank decreases... When the water level drops, the working shaft and the valve body move in conjunction with the float and descend. The valve body closes the drain outlet. During the period from when the valve body opens to when it closes, the drain valve device can selectively execute either a large washing mode in which the water in the water tank is supplied from the drain outlet to the toilet with a first amount of water, or a small washing mode in which the water is supplied to the toilet with a second amount of water less than the first amount of water. The float is configured such that the buoyancy obtained in the small washing mode is less than the buoyancy obtained in the large washing mode.

[0138] In this invention, which is configured in this way, when the toilet is started to be washed, firstly, based on the selection of either the large washing mode or the small washing mode, the working shaft of the drain valve device is raised, thereby raising the valve body (opening the valve), and the washing water in the washing water tank is supplied to the toilet from the drain outlet.

[0139] Then, the water level in the flushing water tank decreases according to the selected large or small flushing mode. As the water level decreases, the float descends. This causes the working shaft of the drain valve device to descend, thereby lowering the valve body (closing the valve) and stopping the supply of flushing water from the flushing water tank to the toilet, thus ending the flushing process.

[0140] At this time, since the buoyancy obtained by the float in the small washing mode is smaller than that obtained in the large washing mode, the descent time of the float in the small washing mode is shorter than that in the large washing mode.

[0141] Therefore, the descent time of the float or the opening time of the valve body in the small cleaning mode can be shorter than that in the large cleaning mode.

[0142] As a result, by changing the buoyancy acting on the float according to the selected large or small wash mode, it is possible to change the water level in the wash water tank and the balance position of the float, and change the descent time of the float as the water level in the wash water tank decreases.

[0143] Therefore, even in the smaller wash mode, which uses less water than the larger wash mode, the instantaneous flow rate (L / min) of the wash water, which affects the washing performance, can be maintained at a relatively high level. In addition, the closing sound produced when the valve closes the drain outlet can also be reduced.

[0144] Furthermore, the present invention is a washing water tank device equipped with the above-mentioned drain valve device.

[0145] In this invention, which is configured in this way, a washing water tank device with a drain valve can be provided. This washing water tank device changes the buoyancy acting on the float according to the selected large washing mode or small washing mode, thereby changing the descent time of the float as the water level decreases. It can maintain a higher instantaneous flow rate (L / min) of washing water discharged from the drain outlet during small washing and can reduce the closing sound generated when the valve body closes the drain outlet.

[0146] Furthermore, the present invention is a toilet with a washing water tank device as described above.

[0147] In this invention, which is configured in this way, a water-washing toilet can be provided, which includes a water tank device with a drain valve. The water-washing toilet can change the buoyancy acting on the float according to the selected large wash mode or small wash mode, thereby changing the descent time of the float as the water level decreases. It can maintain a higher instantaneous flow rate (L / min) of the wash water discharged from the drain in the small wash mode, and can reduce the closing sound generated when the valve closes the drain.

[0148] Invention Effects

[0149] According to the present invention, the drain valve device, the flushing water tank device, and the flushing toilet can change the descent speed of the float as the water level in the storage tank decreases according to the selected large flushing mode or small flushing mode, thereby maintaining a higher instantaneous flow rate (L / min) of flushing water discharged from the drain outlet during small flushing, and reducing the closing sound generated when the drain valve closes the drain outlet. Attached Figure Description

[0150] Figure 1 This is a perspective view of the flushing water tank device and the flushing toilet to which the drain valve device of the first to ninth embodiments of the present invention is applicable, viewed from an obliquely upward angle.

[0151] Figure 2 This is a front sectional view of a washing water tank device equipped with a drain valve device according to the first embodiment of the present invention.

[0152] Figure 3A This is a schematic diagram showing the structure of the drain valve device according to the first embodiment of the present invention, and a series of actions from opening the valve to closing the valve starting from the standby state through the large washing mode.

[0153] Figure 3B This is a schematic diagram showing the structure of the drain valve device according to the first embodiment of the present invention, and a series of actions from opening the valve to closing the valve starting from the standby state through the small washing mode.

[0154] Figure 4A This is a schematic diagram showing the structure of the drain valve device according to the second embodiment of the present invention, and a series of actions from opening the valve to closing the valve starting from the standby state through the large washing mode.

[0155] Figure 4B This is a schematic diagram showing the structure of the drain valve device according to the second embodiment of the present invention, and a series of actions from opening the valve to closing the valve starting from the standby state through the small washing mode.

[0156] Figure 5A This is a schematic diagram showing the structure of the drain valve device according to the third embodiment of the present invention, and a series of actions from opening the valve to closing the valve starting from the standby state through the large washing mode.

[0157] Figure 5B This is a schematic diagram showing the structure of the drain valve device according to the third embodiment of the present invention, and a series of actions from opening the valve to closing the valve starting from the standby state through the small washing mode.

[0158] Figure 6AThis is a conceptual diagram of the structure of the drain valve device according to the fourth embodiment of the present invention, and the state of the float descending after the valve is opened in the large cleaning mode.

[0159] Figure 6B This is a conceptual diagram of the structure of the drain valve device according to the fourth embodiment of the present invention, and the state of the float descending after the valve is opened in the small washing mode.

[0160] Figure 7 This is a front sectional view of a washing water tank device equipped with a drain valve device according to the fifth embodiment of the present invention.

[0161] Figure 8 This is a perspective view of the drain valve device of the fifth embodiment of the present invention viewed from an obliquely upward angle.

[0162] Figure 9 This is a top view of the drain valve device according to the fifth embodiment of the present invention;

[0163] Figure 10 It is along Figure 9 A cross-sectional view along the XX line;

[0164] Figure 11A This is a schematic diagram showing the structure of the drain valve device according to the fifth embodiment of the present invention, and a series of actions from opening the valve to closing the valve starting from the standby state through the large washing mode.

[0165] Figure 11B This is a schematic diagram showing the structure of the drain valve device according to the fifth embodiment of the present invention, and a series of actions from opening the valve to closing the valve starting from the standby state through the small washing mode.

[0166] Figure 12 This is a front sectional view of a washing water tank device equipped with a drain valve device according to the sixth embodiment of the present invention.

[0167] Figure 13A This is a schematic diagram showing the structure of the drain valve device according to the sixth embodiment of the present invention, and a series of actions from opening the valve to closing the valve starting from the standby state through the large washing mode.

[0168] Figure 13B This is a schematic diagram showing the structure of the drain valve device according to the sixth embodiment of the present invention, and a series of actions from opening the valve to closing the valve starting from the standby state through the small washing mode.

[0169] Figure 14A This is a schematic diagram showing the structure of the drain valve device according to the seventh embodiment of the present invention, and a series of actions from opening the valve to closing the valve starting from the standby state through the large washing mode.

[0170] Figure 14BThis is a schematic diagram showing the structure of the drain valve device according to the seventh embodiment of the present invention, and a series of actions from opening the valve to closing the valve starting from the standby state through the small washing mode.

[0171] Figure 15A This is a schematic diagram showing the structure of the drain valve device according to the eighth embodiment of the present invention, and a series of actions from opening the valve to closing the valve starting from the standby state through the large washing mode.

[0172] Figure 15B This is a schematic diagram showing the structure of the drain valve device according to the eighth embodiment of the present invention, and a series of actions from the standby state to the valve opening and closing in the small washing mode.

[0173] Figure 16A This is a schematic diagram showing the structure of the drain valve device according to the ninth embodiment of the present invention, and a series of actions from the standby state to the valve opening and closing during the large wash mode.

[0174] Figure 16B This is a schematic diagram showing the structure of the drain valve device according to the ninth embodiment of the present invention, and a series of actions from opening the valve to closing the valve starting from the standby state through the small washing mode. Detailed Implementation

[0175] Hereinafter, with reference to the attached drawings, several embodiments relating to the drain valve device of the present invention, the flushing water tank device having the drain valve device, and the flushing toilet having the flushing water tank device will be described.

[0176] First, through Figures 1 to 3B The following describes the drain valve device 1, the wash water tank device 2 equipped with the drain valve device 1, and the toilet 4 equipped with the wash water tank device 2 according to the first embodiment of the present invention.

[0177] like Figure 1 and Figure 2 As shown, the flush toilet 4, which is equipped with the flush water tank device 2 of the first embodiment of the present invention, has a ceramic toilet body 8 forming a basin 6.

[0178] The toilet body 8 has a washing water tank device 2, which will be described in detail later, located on the rear side of the upper surface. If the washing water stored in the washing water tank device 2 is supplied to the toilet body 8 of the toilet 4 through the operation of the drain valve device 1 of this embodiment, the basin 6 will be cleaned.

[0179] Among them, the form of the flushing toilet 4 of the flushing water tank device 2 to which the drain valve device 1 of this embodiment is applicable can be, for example, a so-called "siphon-type flushing toilet" that uses siphon action to suck up the waste in the basin 6 and discharge it to the outside in one go from the drain trap (not shown) on the downstream side, or a so-called "wash-off type flushing toilet" that uses the flow action of water generated by the drop of water in the basin 6 to flush out the waste.

[0180] Next, through Figure 2 The general structure of the washing water tank device 2 to which the drain valve device 1 of this embodiment is applicable will be described.

[0181] like Figure 2 As shown, the toilet water tank device 2 includes: an outer water tank 10 made of ceramic; a water storage tank 12, which is disposed inside the toilet water tank device 2 and stores toilet water for washing; and a cover 14, which is placed on top of the outer water tank 10.

[0182] First, the water storage tank 12 is installed on the external water tank 10 via the insulation 16 surrounding the outer periphery of the water storage tank 12.

[0183] Furthermore, the bottom of both the water storage tank 12 and the external water tank 10 is provided with a drain outlet 18 that communicates with the water guide passage 8a of the toilet body 8. This drain outlet 18 can be opened or closed by the drain valve device 1 of this embodiment, which will be described in detail later.

[0184] It should be noted that the cover 14 of the washing water tank device 2 in this embodiment is described in a form where the upper surface of the cover does not have a basin (wash basin) or a faucet for handwashing. However, it is applicable even if such handwashing structures are provided.

[0185] Next, as Figure 2 As shown, the washing water tank device 2 includes a water supply device 20 for supplying washing water to the water storage tank 12.

[0186] The water supply device 20 includes a water supply pipe 22, a valve unit 24 including a water supply valve (not shown), a water supply float 26, and a discharge pipe 28, etc.

[0187] First, the water supply pipe 22 connects an external water supply source (not shown) such as a water pipe to the valve unit 24, and can supply the washing water supplied by the external water supply source (not shown) to the valve unit 24.

[0188] Next, the water supply float 26 is connected to the valve unit 24 via the rod 30 and moves up and down according to the water level in the water storage tank 12, thereby opening or closing the water supply valve (not shown) of the valve unit 24.

[0189] In addition, the discharge pipe 28 is connected to the downstream side of the valve unit 24 and can be opened or closed by the water supply valve (not shown) so as to discharge cleaning water into the water storage tank 12 from the valve unit 24 and stop the discharge (water supply and water stop).

[0190] Next, as Figure 2 As shown, the washing water tank device 2 is equipped with an operating device 32 for opening or closing the drain valve device 1.

[0191] The operating device 32 includes an operating lever 34 that can be manually rotated by the user, a working part (lifting working part 38) for lifting the valve body 36 of the drain valve device 1, and multiple rotating shafts (outer rotating shaft 40, inner rotating shaft 42) that connect the operating lever 34 and the lifting working part 38.

[0192] First, the operating lever 34 is located on the outer side of the left and right sides of the external water tank 10 (viewed from the front). Figure 2 The outer water tank 10 of the washing water tank device 2 shown is on the right side, and can be rotated by the user manually around the rotation center axis A1 that extends in the left and right direction.

[0193] Next, the outer rotating shaft 40 is located inside the outer water tank 10 and extends in the left and right direction, and one end of the outer rotating shaft 40 (the side of the operating lever 34) is connected to the operating lever 34.

[0194] Furthermore, the other end (inner end) of the outer rotating shaft 40 is connected to one end (outer end) of the inner rotating shaft 42, which is disposed inside the outer rotating shaft 40.

[0195] Next, the upper end of the lifting working part 38 is fixed to the upper end and center side of the water storage tank 12.

[0196] The lifting working part 38 includes a rotating main shaft part 44 connected to the other end (inner end side) of the inner rotating shaft 42, and a cylindrical rotating part 46 provided on the outer periphery of the rotating main shaft part 44. If the rotating main shaft part 44 rotates about the rotation center axis A2, the cylindrical rotating part 46 can rotate integrally with the rotating main shaft part 44 about the rotation center axis A2.

[0197] In addition, the cylindrical rotating part 46 includes: a first swing rod 48, which participates in lifting the valve body 36 when the valve body 36 of the drain valve device 1 is opened to start washing the toilet; and a second swing rod 50, which participates when the washing mode of the toilet is switched to either the large washing mode or the small washing mode.

[0198] Furthermore, the first swing rod 48 is connected to the upper side of the first ball chain 52, and the lower side of the first ball chain 52 is connected to the upper end of the working shaft 54 ​​that causes the valve body 36 of the drain valve device 1 to work (linear motion), which will be described in detail later.

[0199] On the other hand, the second swing rod 50 is connected to the upper side of the second ball chain 56, and the lower side of the second ball chain 56 is connected to a part of the size washing switching partition (size washing switching switching valve 58) of the drain valve device 1, which will be described in detail later.

[0200] For example, when starting the deep clean mode on the toilet, if... Figure 2 The operating lever 34 shown is rotated about one side of the rotation center axis A1. Figure 2 When the lever 34 is rotated by a specified angle (e.g., 90 degrees), the outer rotating shaft 40 and the inner rotating shaft 42 connected to the operating lever 34 rotate to one side, and the rotating main shaft 44 of the lifting working part 38 rotates around the rotation center axis A2 to one side.

[0201] Therefore, the cylindrical rotating part 46 of the lifting working part 38 is also integral with the rotating main shaft part 44 around the rotation center axis A2 to one side ( Figure 2 The first swing lever 48 rotates to one side in a manner that lifts the first ball chain 52 (with the front side of the middle), and the first swing lever 48 rotates to one side in a manner that lifts the first ball chain 52. Figure 2 The second swing lever 50 swings (rotates) to one side in a manner that lifts the second ball chain 56. Figure 2 The front side of the middle swings (rotates).

[0202] On the other hand, when starting the toilet in the gentle wash mode, if... Figure 2 The operating lever 34 shown rotates back to the other side around the rotation center axis A1. Figure 2 When the inner side of the lever 34 is rotated by a specified angle (e.g., 90 degrees), the outer rotating shaft 40 and the inner rotating shaft 42 connected to the operating lever 34 rotate to the other side, and the rotating main shaft 44 of the lifting working part 38 rotates to the other side around the rotation center axis A2.

[0203] Therefore, the cylindrical rotating part 46 of the lifting working part 38 is also integral with the rotating main shaft part 44 around the rotation center axis A2 to the other side. Figure 2 The first swing lever 48 rotates to the other side by lifting the first ball chain 52 (inside). Figure 2 The inner side of the swing arm 50 swings (rotates), while the second swing arm 50 does not swing and the second ball chain 56 is not lifted.

[0204] It should be noted that in this embodiment, the operating device 32 for operating the drain valve device 1 is described as a form in which the user manually operates the operating lever 34, but it is not limited to this form and can be applied to other forms as well.

[0205] For example, as another form of operating device, the controller can electrically control the operation of the drive unit (motor, etc.) that lifts the working part based on signals input by the user through operation buttons, thereby automatically performing the lifting operation of the valve body 36 of the drain valve device 1 by the first swing arm 48 or the switching operation of the large and small washing modes by the second swing arm 50.

[0206] Furthermore, each ball chain 52, 56 of the drain valve device 1 in this embodiment can be a linear component.

[0207] Next, through Figures 2 to 3B The details of the drain valve device 1 in this embodiment will be described.

[0208] in, Figure 3A and Figure 3B In each of the states (Ⅰ) to (Ⅵ) of the drain valve device 1 in the large cleaning mode and the small cleaning mode shown, the state before the valve body 36 is opened (standby state) is set as state (Ⅰ). Then, the valve body 36 is opened in time sequence and set as state (Ⅱ) to (Ⅴ). The valve body 36 is closed and set as state (Ⅵ).

[0209] First, such as Figure 2 As shown, the drain valve device 1 of this embodiment includes: a drain outlet forming part 60, which is installed on the bottom surface of the water storage tank 12 and forms a drain outlet 18; a water storage cylinder 62, which is disposed above the drain outlet forming part 60; and an overflow pipe 64, which is installed on the drain outlet forming part 60 in a manner that communicates with the drain outlet 18.

[0210] Next, as Figure 2 As shown, the drain valve device 1 includes: a valve seat 66 formed at the upper edge of the drain outlet 18; a valve body 36 configured to be closed relative to the valve seat 66 and capable of linear upward movement; and a working shaft 54, the lower end of which is provided with the valve body 36 and opens or closes the valve body 36 by linear movement (up and down movement) in the vertical direction. The working shaft 54 ​​is configured to pass through a water storage cylinder 62 in the vertical direction.

[0211] In addition, the water storage cylinder 62 can store a portion of the washing water in the water storage tank 12, and the left and right side walls 62a are respectively provided with a first outflow hole 68 and a second outflow hole 70 for the washing water in the water storage cylinder 62 to flow out to the outside (inside the water storage tank 12).

[0212] Furthermore, a float 72 is disposed inside the water storage cylinder 62. The float 72 is concentrically arranged on the outer periphery of the working shaft 54 ​​and can move up and down in conjunction with the water level inside the water storage cylinder 62, so that the buoyancy obtained by the washing water inside the water storage cylinder 62 acts on the working shaft 54.

[0213] Next, as Figure 2 As shown, on one side of the left and right sidewalls 62a of the water storage cylinder 62 (viewed from the front side) Figure 2 The second outlet 70 of the water storage tank (on the right side) is provided with a partition (switching valve 58) for switching between large and small washing in a manner that can be opened or closed.

[0214] like Figure 3A As shown, when the toilet is being cleaned in the large cleaning mode, the second ball chain 56 is lifted by the second swing rod 50, thereby closing the second outflow hole 70.

[0215] On the other hand, such as Figure 3B As shown, when the toilet is in the small washing mode, the second ball chain 56 is not lifted and relaxed by the second swing rod 50, thereby opening the second outflow hole 70.

[0216] That is, such as Figure 3A As shown in states (II) to (V), when the valve body 36 is opened in the large cleaning mode, the first outlet hole 68 is always open and the second outlet hole 70 is closed by the switching valve 58.

[0217] On the other hand, such as Figure 3B As shown in states (II) to (V), when the valve body 36 is opened in the small cleaning mode, the first outlet hole 68 is always open and the second outlet hole 70 is opened by the switching valve 58.

[0218] Based on the above, Figure 3B In the small cleaning mode shown in states (II) to (V), the total opening area S2 of the outlet holes 68 and 70 of the valve body 36 when the valve is opened is set to be greater than Figure 3A The total opening area S1 (S2>S1) of the water reservoir 62 outlet hole 68 and outlet hole 70 when the valve body 36 is opened in the large cleaning mode shown in states (Ⅱ) to (Ⅴ).

[0219] Therefore, in the small cleaning mode, the amount of cleaning water flowing from the water tank 62 in the water reservoir 62 through each outlet hole 68 and outlet hole 70 to the water tank 12 per unit time is greater than the amount of cleaning water flowing from the water tank 62 in the water reservoir 62 through only the first outlet hole 68 to the water tank 12 per unit time in the large cleaning mode (Q2 > Q1).

[0220] in, Figure 3A and Figure 3B In each of states (Ⅰ) to (Ⅵ), the water level in the water tank 12 is set as symbol W1, and the water level in the water cylinder 62 is set as symbol W2. However, since the amount of water Q2 flowing out of each outlet hole 68 and outlet hole 70 of the water cylinder 62 to the water tank 12 per unit time in the small cleaning mode is greater than the amount of water Q1 flowing out of only the first outlet hole 68 of the water cylinder 62 to the water tank 12 per unit time in the large cleaning mode (Q2>Q1), the rate of decrease of the water level W2 in the water cylinder 62 in the small cleaning mode is also greater than the rate of decrease of the water level W1 in the water cylinder 62 in the large cleaning mode (v2>v1).

[0221] Therefore, when the float 72 descends in conjunction with the decrease in water level in the water tank 62 during the small cleaning mode, the descent speed v2 of the float 72 is greater than the descent speed v1 of the float 72 during the large cleaning mode (v2 > v1).

[0222] Next, through Figures 2 to 3B The operation of the drain valve device 1 according to the first embodiment of the present invention will be described.

[0223] First, through Figure 2 and Figure 3A The large-scale cleaning mode performed by the drain valve device 1 of the first embodiment of the present invention will be described.

[0224] From Figure 2 and Figure 3A When the standby state (Ⅰ) starts the deep cleaning mode, for example, if the user uses... Figure 2 Rotating the control lever 34 90 degrees to the front will put it in position. Figure 2 In the initial position shown (standby state), the first swing rod 48 and the second swing rod 50 swing respectively, and the first ball chain 52 and the second ball chain 56 are lifted respectively.

[0225] As a result, the working shaft 54 ​​and valve body 36 of the drain valve device 1 are lifted and move upward in a straight line via the first ball chain 52, thereby the float 72 is also lifted integrally via the working shaft 54 ​​(see reference). Figure 3AState (II)).

[0226] Furthermore, a portion of the partition (switching valve 58) for switching between large and small washes in the drain valve device 1 is lifted via the second ball chain 56, thereby rotating the switching valve 58 to close the second outlet hole 70 of the water storage tank 62 (see reference). Figure 3A State (II)).

[0227] At this time, as Figure 3A As shown in state (II), the float 72 and valve body 36 are in the highest position, and the drain outlet 18 of the water storage tank 12 is opened by the raised valve body 36, and the washing water begins to be discharged from the water storage tank 12 to the drain outlet 18.

[0228] After that, as Figure 3A As shown in state (Ⅲ), if the water level W1 in the water storage tank 12 drops to near the upper end of the water storage cylinder 62, and then further drops to a water level lower than the upper end of the water storage cylinder 62, the water pressure generated by the water level W2 in the water storage cylinder 62 is higher than the water pressure generated by the water level W1 in the water storage tank 12 outside the water storage cylinder 62. Therefore, the washing water in the water storage cylinder 62 flows out from the first outlet hole 68 into the water storage tank 12 outside the water storage cylinder 62.

[0229] Then, as Figure 3A As shown in state (Ⅳ), the water level W2 in the water storage cylinder 62 is higher than the water level W1 in the water storage tank 12 outside it. However, since the washing water in the water storage cylinder 62 continues to flow out from the first outlet hole 68, the water level W2 in the water storage cylinder 62 gradually decreases, and the float 72 also decreases in conjunction with the decrease in water level W2.

[0230] Next, as Figure 3A As shown in state (V), if the water level W1 in the water tank 12 outside the water storage cylinder 62 drops to a level lower than the upper end of the first outlet hole 68 of the water storage cylinder 62, then the outside of the first outlet hole 68 of the water storage cylinder 62 opens to the atmosphere.

[0231] As a result, the speed at which the washing water in the water storage tank 62 flows out from the first outlet hole 68 increases, and the water level W2 in the water storage tank 62 also drops further. Consequently, the float 72 also drops, and the working shaft 54 ​​and valve body 36 also drop as a whole.

[0232] Then, as Figure 3A As shown in state (VI), if valve body 36 is in contact with valve seat 66, drain port 18 will close.

[0233] Therefore, the discharge of cleaning water from the water storage tank 12 to the drain outlet 18 stops, and the supply of cleaning water from the cleaning water tank device 2 to the toilet body 8 in the large cleaning mode ends.

[0234] At this time, the float 72, working shaft 54, and valve body 36 are stopped. However, the lowest water level DWL1 in the water storage tank 12 (the so-called "static water line," the drainage stop water level) is located below the lower end of the first outlet hole 68 of the water storage cylinder 62. Therefore, the washing water in the water storage cylinder 62 continues to flow out from the first outlet hole 68 to the water storage tank 12 side, while the water level W2 in the water storage cylinder 62 gradually decreases, and the water pressure in the water storage cylinder 62 also decreases.

[0235] At this time, the switching valve 58, which closes the second outlet hole 70 of the water storage tank 62, changes from a closed state due to the water pressure of the washing water in the water storage tank 62 to an open state due to the decrease in water pressure in the water storage tank 62, moving (rotating) towards opening the second outlet hole 70.

[0236] That is, in the standby state from the end of the major cleaning mode to the start of the next cleaning mode, the switching valve 58 is in the state of opening the second outlet hole 70.

[0237] Next, through Figure 2 and Figure 3B The small washing mode performed by the drain valve device 1 of the first embodiment of the present invention will be described.

[0238] From Figure 2 and Figure 3B When the user starts the small cleaning mode from standby state (Ⅰ), for example, if the user... Figure 2 When the control lever 34 shown is rotated 90 degrees inward, it will only be in the position shown. Figure 2 The first swing lever 48 swings in the initial position (standby state) shown, and only the first ball chain 52 rises.

[0239] As a result, the working shaft 54 ​​and valve body 36 of the drain valve device 1 are lifted and move upward in a straight line via the first ball chain 52, thereby the float 72 is also lifted integrally via the working shaft 54 ​​(see reference). Figure 3B State (II)).

[0240] On the other hand, since the second swing rod 50 does not swing, the second ball chain 56 is not lifted, and the switching valve 58 for switching between large and small washes remains open at all times in the second outlet hole 70 of the water storage tank 62.

[0241] It should be noted that the switching valve 58 remains open from this point until the end of the small wash mode (refer to...). Figure 3B (States (II) to (VI)).

[0242] In addition, such as Figure 3BAs shown in state (II), the float 72 and valve body 36 are in the highest position, and the drain outlet 18 of the water storage tank 12 is opened by the raised valve body 36, and the washing water begins to be discharged from the water storage tank 12 to the drain outlet 18.

[0243] After that, as Figure 3B As shown in state (Ⅲ), if the water level W1 in the water tank 12 drops to near the upper end of the water cylinder 62 and then becomes even lower than the upper end of the water cylinder 62, the water pressure generated by the water level W2 in the water cylinder 62 is higher than the water pressure generated by the water level W1 in the water tank 12 outside the water cylinder 62. Therefore, the washing water in the water cylinder 62 flows out from the first outlet hole 68 and the second outlet hole 70 to the water tank 12 outside the water cylinder 62.

[0244] Then, as Figure 3B As shown in states (Ⅳ) and (Ⅴ), since the water level W2 in the water storage cylinder 62 is higher than the water level W1 in the water storage tank 12 outside the water storage cylinder 62, the washing water in the water storage cylinder 62 continues to flow out from each outflow hole 68 and outflow hole 70. Therefore, the water level W2 in the water storage cylinder 62 gradually decreases, and the float 72 also decreases in conjunction with the decrease in water level W2.

[0245] at this time, Figure 3B The amount of washing water Q2 flowing from each outlet hole 68 and outlet hole 70 of the water tank 62 to the water tank 12 per unit time in the small washing mode shown in states (Ⅳ) and (Ⅴ) is compared with that in states (Ⅳ) and (Ⅴ). Figure 3A In the large washing mode shown in states (Ⅳ) and (Ⅴ), the amount of washing water Q1 flowing out from the first outlet hole 68 of the water storage cylinder 62 to the water storage tank 12 per unit time is large (Q2>Q1).

[0246] Therefore, the water level W2 in the water tank 62 and the descent speed v2 of the float 72 during the small cleaning mode are greater than the water level W1 in the water tank 62 and the descent speed v1 of the float 72 during the large cleaning mode (v2 > v1).

[0247] And, as Figure 3B As shown in state (VI), if valve body 36 contacts valve seat 66, drain outlet 18 closes, stopping the discharge of washing water from water storage tank 12 to drain outlet 18.

[0248] Thus, the supply of washing water from the washing water tank device 2 to the toilet body 8 in the small washing mode ends.

[0249] at this time, Figure 3B In the small wash mode of state (VI), the lowest water level DWL2 (the so-called "static water line" or drain stop water level) in the water tank 12 is located at a level higher than that in the small wash mode. Figure 3AThe water level in the water tank 12 during the large wash mode in state (VI) is above the lowest water level DWL1.

[0250] That is, the amount of washing water discharged from the water storage tank 12 to the drain outlet 18 in the small washing mode is less than the amount of washing water discharged from the water storage tank 1 to the drain outlet 18 in the large washing mode by the amount corresponding to the lower water level DWL2 in the small washing mode being higher than the lower water level DWL1 in the large washing mode.

[0251] According to the drain valve device 1 of the first embodiment of the present invention described above, when the toilet 4 is started to be washed, firstly, based on the selection of either the large washing mode or the small washing mode, the working shaft 54 ​​of the drain valve device 1 is raised, thereby raising the valve body 36 (opening the valve), and the washing water in the water storage tank 12 of the washing water tank device 2 is supplied from the drain outlet 18 to the toilet body 8 of the toilet 4.

[0252] Then, the water level W2 in the water tank 62 decreases according to the selected large or small washing mode, and as the water level W2 decreases, the float 72 in the water tank 62 descends.

[0253] As a result, the working shaft 54 ​​of the drain valve device 1 descends, thereby causing the valve body 36 to descend (close the valve), stopping the supply of cleaning water from the water storage tank 12 to the toilet 4, and ending the cleaning process of the toilet 4.

[0254] At this time, since the descent speed v1 and v2 of the float 72 as the water level in the water tank 62 decreases can be changed according to the selected large or small washing mode, the descent time of the float 72 or the opening time of the valve body 36 can also be changed according to the selected washing mode.

[0255] Therefore, even in the small wash mode, which uses less water than the large wash mode, the flow rate (instantaneous flow rate) of the wash water per unit time (L / min) that affects the washing performance can still be maintained at a relatively high level.

[0256] Furthermore, by changing the descent speed v1 and v2 of the float 72 as the water level in the water tank 62 decreases according to the selected large or small washing mode, the closing sound generated when the valve body 36 closes the drain outlet 18 can be reduced.

[0257] Furthermore, according to the drain valve device 1 of this embodiment, the total opening area S2 of the outlet hole 68 and outlet hole 70 of the water storage cylinder 62 in the small cleaning mode when the valve body 36 is opened is set to be greater than the total opening area S1 of the outlet hole 68 of the water storage cylinder 62 in the large cleaning mode when the valve body 36 is opened (S2>S1).

[0258] Therefore, in the small cleaning mode, the amount of cleaning water in the water tank 62 flowing out of each outlet hole 68 and outlet hole 70 to the water tank 12 per unit time Q2 (L / min) (the so-called "drainage speed Q2") is greater than the amount of cleaning water in the water tank 62 flowing out of the first outlet hole 68 to the water tank 12 per unit time Q1 (L / min) (the so-called "drainage speed Q1") when the valve body 36 is opened in the large cleaning mode. Therefore, the descent speed v2 of the float 72 in the small cleaning mode can be greater than the descent speed v1 of the float 72 in the large cleaning mode (v2 > v1).

[0259] Therefore, the descent time of float 72 or the opening time of valve body 36 in the small cleaning mode can be shorter than the descent time of float 72 or the opening time of valve body 36 in the large cleaning mode.

[0260] As a result, by changing the amount of washing water Q1, Q2 (L / min) flowing from the outlet holes 68 and 70 to the water tank 12 per unit time (the so-called "drainage speed Q1, Q2") according to the selected large washing mode or small washing mode, it is possible to change the descent speed v1, v2 of the float 72 as the water level in the water tank 62 decreases.

[0261] Therefore, even in the small wash mode, which uses less water than the large wash mode, the instantaneous flow rate (L / min) of the wash water, which affects the washing performance, can still be maintained at a relatively high level.

[0262] In addition, it can also reduce the closing sound generated when the valve body 36 closes the drain port 18.

[0263] Furthermore, according to the drain valve device 1 of this embodiment, when the valve body 36 is opened in the large cleaning mode, the cleaning water in the water storage tank 62 flows out from the first outlet hole 68 to the cleaning water tank. And when the valve body 36 is opened in the small cleaning mode, the cleaning water in the water storage tank 62 flows out from both the first outlet hole 68 and the second outlet hole 70 to the water storage tank 12.

[0264] At this time, compared to the first washing water volume Q1 (L / min) per unit time (the so-called "first drainage speed Q1") of the washing water in the water tank 62 flowing out of the first outlet 68 to the water tank 12 in the large washing mode, the second washing water volume Q2 (L / min) per unit time (the so-called "second drainage speed Q2") of the washing water in the water tank 62 flowing out of both the first outlet 68 and the second outlet 70 to the water tank 12 in the small washing mode can be set to be larger.

[0265] Therefore, the descent speed v2 of float 72 in small cleaning mode can be greater than the descent speed v1 of float 72 in large cleaning mode. Thus, the descent time of float 72 or the opening time of valve body 36 in small cleaning mode can be shorter than the descent time of float 72 or the opening time of valve body 36 in large cleaning mode.

[0266] As a result, by changing the amount of washing water Q1, Q2 (L / min) flowing from the outlet holes 68 and 70 to the water tank 12 per unit time (the so-called "drainage speed Q1, Q2") according to the selected large washing mode or small washing mode, it is possible to change the descent speed v1, v2 of the float 72 as the water level in the water tank 62 decreases.

[0267] Therefore, even in the small wash mode, which uses less water than the large wash mode, the instantaneous flow rate (L / min) of the wash water, which affects the washing performance, can still be maintained at a relatively high level.

[0268] In addition, it can also reduce the closing sound generated when the valve body 36 closes the drain port 18.

[0269] Furthermore, according to the drain valve device 1 of this embodiment, by closing the outlet hole 68 and a portion of the outlet hole 70 (second outlet hole 70) of the water storage cylinder 62 using the switching valve 58 for switching between large and small washing modes, the outlet hole 68 and a portion of the outlet hole 70 (second outlet hole 70) can be closed, so that the total opening area S1 of the outlet hole 68 in the large washing mode is smaller than the total opening area S2 of the outlet hole 68 and the outlet hole 70 in the small washing mode.

[0270] Therefore, in the small cleaning mode, the amount of cleaning water flowing from the water tank 62 in the water storage cylinder 62 through each outlet hole 68 and outlet hole 70 to the water storage tank 12 per unit time is Q2 (L / min) (the so-called "drainage speed Q2"), which is greater than the amount of cleaning water flowing from the water tank 62 in the water storage cylinder 62 through only the first outlet hole 68 to the water storage tank 12 per unit time in the large cleaning mode (the so-called "drainage speed Q1") (Q2 > Q1). Thus, the descent speed v2 of the float 72 in the small cleaning mode can be greater than the descent speed v1 of the float 72 in the large cleaning mode (v2 > v1).

[0271] Therefore, the descent time of the float 72 or the opening time of the valve body 36 in the small cleaning mode can be set to be shorter than the descent time of the float 72 or the opening time of the valve body 36 in the large cleaning mode.

[0272] As a result, the amount of washing water flowing from the water tank 62 through the outlet holes 68 and 70 to the water tank 12 per unit time (so-called "drainage speed Q1, Q2") can be changed according to the selected large washing mode or small washing mode, thereby changing the descent speed v1, v2 of the float 72 as the water level in the water tank 62 decreases.

[0273] Therefore, even in the smaller wash mode, which uses less water than the larger wash mode, the instantaneous flow rate (L / min) of the wash water, which affects the washing performance, can be maintained at a relatively high level. In addition, the closing sound generated when the valve body 36 closes the drain port 18 can also be reduced.

[0274] Next, refer to Figure 1 , Figure 4A and Figure 4B The drain valve device 100 of the second embodiment of the present invention will be described.

[0275] Among them, for Figure 4A and Figure 4B The parts of the drain valve device 100 of the second embodiment of the present invention shown are the same as those of the drain valve device 1 of the first embodiment of the present invention described above, with the same reference numerals added and their descriptions omitted.

[0276] First, such as Figure 4A and Figure 4B As shown, in the drain valve device 100 of the second embodiment of the present invention, the water storage cylinder 162 has a single outlet hole 168 on one of its left and right side wall portions 162a.

[0277] Furthermore, the outlet 168 of the water storage cylinder 162 is provided with a dividing part (switching valve 158) for switching between large and small washes in a manner that can be opened or closed. The switching valve 158 slides in the vertical direction according to the vertical movement of the second ball chain 56, thereby allowing the outlet 168 to be opened or closed.

[0278] Furthermore, the drain valve device 100 in this embodiment includes a connecting hole 170, which allows communication between the water storage cylinder 162 and the water storage tank 12 when the switching valve 158 closes the outlet hole 168. The cross-sectional area of ​​the opening of the connecting hole 170 is set to be smaller than the cross-sectional area of ​​the opening of the outlet hole 168.

[0279] Furthermore, in the drain valve device 100 of this embodiment, even when the outlet hole 168 of the water storage cylinder 162 is closed by the switching valve 158, the connecting hole 170 can always connect the inside of the water storage cylinder 162 and the inside of the water storage tank 12. These structures are different from the structure of the drain valve device 1 of the first embodiment of the present invention described above.

[0280] Next, through Figure 4A and Figure 4B The operation of the drain valve device 100 according to the second embodiment of the present invention will be described.

[0281] First of all, Figure 4A and Figure 4B In the standby state shown in state (Ⅰ), the switching valve 158 opens the outlet hole 168 of the water storage tank 162.

[0282] Then, from that Figure 4A When the standby state shown in state (Ⅰ) is activated and the deep cleaning mode is started, in Figure 4A In state (II), the working shaft 54 ​​and valve body 36 are lifted upward by the first ball chain 52.

[0283] At this time, the switching valve 158 is also lifted upward by the second ball chain 56, thus sliding upward, and the outlet 168 of the water storage tank 162 is closed by the switching valve 158 (see reference). Figure 4A State (II)).

[0284] It should be noted that the state in which the outlet 168 of the water storage tank 162 is closed by the switching valve 158 will remain unchanged from the subsequent state. Figure 4A State (III) is maintained until valve 36 is closed and the large cleaning mode ends. Figure 4A The state (VI).

[0285] However, as Figure 4A As shown in states (II) to (VI), even when the outlet hole 168 of the water storage cylinder 162 is closed by the switching valve 158, the connecting hole 170 is always connected to the inside of the water storage cylinder 162 and the inside of the water storage tank 12.

[0286] Then, as Figure 4A As shown in states (Ⅳ) to (Ⅵ), if the water level W1 in the water tank 12 outside the water tank 162 drops to a level lower than the water level W2 in the water tank 162, the water pressure in the water tank 162 is higher than the water pressure in the water tank 12. Therefore, even when the outlet hole 168 of the water tank 162 is closed by the switching valve 158, the pressure difference between the water tank 162 and the water tank 12 outside the water tank 162 can cause the clean water in the water tank 162 to flow out from the connecting hole 170 into the water tank 12.

[0287] On the other hand, from Figure 4B When the standby state shown in state (Ⅰ) is activated and the small cleaning mode is started, in Figure 4B In state (II), the working shaft 54 ​​and valve body 36 are lifted upward by the first ball chain 52.

[0288] On the other hand, since the switching valve 158 is neither lifted upwards by the second ball chain 56 nor slid upwards, the outlet hole 168 of the water storage tank 162 is open by the switching valve 158 (see reference). Figure 4B (Reference to State (II)).

[0289] Then, the water outlet 168 of the water storage cylinder 162 flows from... Figure 4B Standby state (Ⅰ) to Figure 4B Until the end of the small cleaning mode (VI), the switching valve 158 keeps it open at all times.

[0290] Furthermore, after the mini-wash mode ends Figure 4B In state (VI), the lowest water level DWL2 in the water tank 12 during the small wash mode is located at a position higher than that in the small wash mode. Figure 4A The water level in the water tank 12 during the large wash mode in state (VI) is above the lowest water level DWL1.

[0291] According to the drain valve device 100 of the second embodiment of the present invention described above, in Figure 4A In the large washing mode shown, the switching valve 158 for switching between large and small washing closes the single outflow hole 168 of the water storage tank 162, thereby allowing the washing water in the water storage tank 162 to flow out from the connecting hole 170 of the switching valve 158, which has a smaller opening cross-sectional area than the opening cross-sectional area of ​​the outflow hole 168, into the water storage tank 12.

[0292] On the other hand, Figure 4B In the small washing mode shown, the switching valve 158 opens the outlet hole 168 at all times, so that the washing water in the water tank 162 can flow out from the entire outlet hole 168 into the water tank 12.

[0293] Therefore, in the small washing mode, the amount of washing water flowing from the water tank 162 through the entire outlet 168 to the water tank 12 per unit time, Q2 (L / min) (the so-called "drainage rate Q2"), is greater than the amount of washing water flowing from the water tank 162 through the connecting hole 170 of the switching valve 158 to the water tank 12 per unit time, Q1 (L / min) (the so-called "drainage rate Q1") (Q2 > Q1).

[0294] Therefore, the descent speed v2 of float 72 in small cleaning mode can be greater than the descent speed v1 of float 72 in large cleaning mode.

[0295] Therefore, the valve opening time of valve body 36 in the small cleaning mode is shorter than that in the large cleaning mode.

[0296] As a result, by changing the amount of washing water Q1, Q2 (L / min) flowing from the outlet 168 to the water tank 12 per unit time (so-called "drainage speed Q1, Q2") in the water tank 162 according to the selected large washing mode or small washing mode, it is possible to change the descent speed of the float 72 as the water level in the water tank 162 decreases.

[0297] Therefore, even in the smaller wash mode, which uses less water than the larger wash mode, the instantaneous flow rate (L / min) of the wash water, which affects the washing performance, can be maintained at a relatively high level. In addition, the closing sound generated when the valve body 36 closes the drain port 18 can also be reduced.

[0298] Next, refer to Figure 1 , Figure 5A and Figure 5B The drain valve device 200 of the third embodiment of the present invention will be described.

[0299] Among them, for Figure 5A and Figure 5B The parts of the drain valve device 200 of the third embodiment of the present invention that are the same as those of the drain valve device 1 of the first embodiment and the drain valve device 100 of the second embodiment of the present invention are given the same reference numerals and their descriptions are omitted.

[0300] First, such as Figure 5A and Figure 5B As shown, in the drain valve device 200 of the third embodiment of the present invention, the water storage cylinder 262 has a first outlet hole 268 disposed below and a second outlet hole 270 disposed above the first outlet hole 268 on the side wall portion 262a of one of its left and right sides.

[0301] Furthermore, the second outlet 270 of the water storage cylinder 262 is provided with a dividing section (switching valve 258) for switching between large and small washes in a manner that can be opened or closed. The switching valve 258 rotates from a horizontal position to a vertical position according to the up and down movement of the second ball chain 56, thereby enabling the second outlet 270 to be opened or closed.

[0302] Therefore, in Figure 5A In the large cleaning mode shown, since the second outlet 270 of the water tank 262 is closed by the switching valve 258, the cleaning water in the water tank 262 flows out only from the first outlet 268 below to the water tank 12.

[0303] On the other hand, Figure 5B In the small washing mode shown, since the second outlet hole 270 of the water tank 262 is opened by the switching valve 258, the washing water in the water tank 262 flows out from both the first outlet hole 268 and the second outlet hole 270 to the water tank 12.

[0304] In addition, the water storage tank 262 is configured such that when the valve body 36 is opened, the total opening area S2 of the first outlet hole 268 and the second outlet hole 270 in the small cleaning mode is larger than the total opening area S1 of only the first outlet hole 268 in the large cleaning mode.

[0305] Therefore, in the small washing mode, the amount of washing water in the water tank 262 flowing out from the first outlet hole 268 and the second outlet hole 270 to the water tank 12 per unit time, Q2 (L / min) (the so-called "drainage speed Q2"), is set to be greater than the amount of washing water in the water tank 262 flowing out from the first outlet hole 268 to the water tank 12 per unit time, Q1 (L / min) (the so-called "drainage speed Q1") (Q2 > Q1) in the large washing mode.

[0306] Next, through Figure 5A and Figure 5B The operation of the drain valve device 200 according to the third embodiment of the present invention will be described.

[0307] First of all, Figure 5A and Figure 5B In the standby state shown in state (Ⅰ), the switching valve 258 is in a horizontal position and the second outlet hole 270 of the water storage tank 162 is open.

[0308] Then, from that Figure 5A When the standby state shown in state (Ⅰ) is activated and the deep cleaning mode is started, in Figure 5A In state (II), the working shaft 54 ​​and valve body 36 are lifted upward by the first ball chain 52.

[0309] At this time, the switching valve 258 is lifted upward by the second ball chain 56 and rotates from a horizontal position to a vertical position, and the second outlet hole 270 of the water storage cylinder 262 is closed by the switching valve 258 (see reference). Figure 5A State (II)).

[0310] It should be noted that the second outlet 270 of the water storage cylinder 262 is closed by the switching valve 258 from the rear. Figure 5A State (III) is maintained until valve 36 is closed, thus ending the large-scale cleaning mode. Figure 5A The state (VI).

[0311] However, as Figure 5A As shown in states (II) to (VI), even when the second outlet hole 270 of the water storage cylinder 262 is closed by the switching valve 258, the first outlet hole 268 is always open and always connected to the inside of the water storage cylinder 262 and the inside of the water storage tank 12.

[0312] Then, as Figure 5A As shown in states (Ⅲ) to (Ⅵ), if the water level W1 in the water tank 12 outside the water tank 262 drops to a level lower than the water level W2 in the water tank 262, the water pressure in the water tank 262 is higher than the water pressure in the water tank 12. Therefore, even if the second outlet hole 270 of the water tank 262 is closed by the switching valve 258, the washing water in the water tank 262 can still flow out from the first outlet hole 268 into the water tank 12 through the pressure difference between the water tank 262 and the water tank 12 outside the water tank 262.

[0313] On the other hand, from Figure 5B When the standby state shown in state (Ⅰ) is activated and the small cleaning mode is started,... Figure 5B In state (II), the working shaft 54 ​​and valve body 36 are lifted upward by the first ball chain 52.

[0314] On the other hand, because the switching valve 258 was not lifted upward by the second ball chain 56 and did not rotate from a horizontal to a vertical position, the second outlet hole 270 of the water storage tank 262 is open by the switching valve 258 (see reference). Figure 5B State (II)).

[0315] Then, from the second outlet hole 270 of the water storage cylinder 262... Figure 5B Standby state (Ⅰ) to Figure 5B Until the end of the small cleaning mode (VI), the switching valve 258 remains open at all times.

[0316] Next, in Figure 5B In the small washing mode shown in states (Ⅲ) to (Ⅴ), since the water level W1 in the water tank 12 drops to a level lower than the water level W2 in the water cylinder 262, and the water level W2 in the water cylinder 262 is located above the lower end of the second outlet hole 270, the washing water in the water cylinder 262 flows out from the first outlet hole 268 at a washing water volume Q2a (L / min) per unit time (so-called "drainage rate Q2a"), and flows out from the second outlet hole 270 at a washing water volume Q2b (L / min) per unit time (so-called "drainage rate Q2b").

[0317] At this time, when the water level W1 in the water storage tank 12 drops to a level lower than that of the second outlet hole 270, since the second outlet hole 270 is open to the atmosphere, the drainage velocity Q2b of the second outlet hole 270 is equal to or greater than the drainage velocity Q2a of the first outlet hole 268 (Q2b≥Q2a).

[0318] Then, as Figure 5BAs shown in state (VI), when the mini-wash mode is over, the lowest water level DWL2 in the water tank 12 during the mini-wash mode is at a position lower than that in the mini-wash mode. Figure 5A The water level in the water tank 12 during the large wash mode in state (VI) is above the lowest water level DWL1.

[0319] According to the drain valve device 200 of the third embodiment of the present invention described above, the total opening area S2 of the first outlet hole 268 and the second outlet hole 270 of the water storage cylinder 262 in the small washing mode is set to be greater than the total opening area S1 of only the first outlet hole 268 of the water storage cylinder 262 in the large washing mode, and the second outlet hole 270 is disposed above the first outlet hole 268.

[0320] Therefore, in Figure 5A When the valve body 36 is opened in the large cleaning mode shown, the cleaning water in the water storage tank 262 flows out only from the first outlet hole 268 into the water storage tank 12, and, Figure 5B When the valve body 36 is opened in the small washing mode shown, the washing water in the water storage tank 262 flows out from both the first outlet hole 268 and the second outlet hole 270 into the water storage tank 12.

[0321] Furthermore, in the small washing mode, the second washing water volume Q2 (L / min) (the so-called "second drainage speed Q2") of the washing water in the water tank 262 flowing out from both the first outlet hole 268 and the second outlet hole 270 to the water tank 12 per unit time can be set to be greater than the first washing water volume Q1 (L / min) (the so-called "first drainage speed Q1") of the washing water in the water tank 262 flowing out from only the first outlet hole 268 to the water tank 12 per unit time in the large washing mode.

[0322] Therefore, the descent speed v2 of float 72 in small cleaning mode can be greater than the descent speed v1 of float 72 in large cleaning mode. Thus, the descent time of float 72 or the opening time of valve body 36 in small cleaning mode can be shorter than the descent time of float 72 or the opening time of valve body 36 in large cleaning mode.

[0323] As a result, by changing the amount of washing water Q1, Q2 (L / min) flowing from the outlet holes 268 and 270 to the water tank 12 per unit time (the so-called "drainage speed Q1, Q2") according to the selected large washing mode or small washing mode, it is possible to change the descent speed v1, v2 of the float 72 as the water level in the water tank 262 decreases.

[0324] Therefore, even in the smaller wash mode, where the wash water volume is less than that of the larger wash mode, the instantaneous flow rate (L / min) of the wash water, which affects the wash performance, can be maintained at a relatively high level. In addition, the closing sound generated when the valve body 36 closes the drain port 18 can also be reduced.

[0325] Next, refer to Figure 1 , Figure 6A and Figure 6B The drain valve device 300 of the fourth embodiment of the present invention will be described.

[0326] Among them, Figure 6A and Figure 6B In the drain valve device 300 of the fourth embodiment of the present invention shown, the same reference numerals are added to the parts that are the same as those in the drain valve devices 1, 100, and 200 of the first to third embodiments of the present invention described above, and their descriptions are omitted.

[0327] First, such as Figure 6A and Figure 6B As shown, in the drain valve device 300 of the fourth embodiment of the present invention, the water storage cylinder 362 has a first outlet hole 368 disposed below and a second outlet hole 370 disposed above the first outlet hole 368 on one of its left and right sidewall portions 362a.

[0328] In addition, each of the first outlet hole 368 and the second outlet hole 370 of the water storage cylinder 362 is provided with a separation section (switching valve 358) for switching between large and small washing in a manner that can be opened or closed.

[0329] The switching valve 358 can slide in the vertical direction by moving up and down via the second ball chain 56 according to the size washing mode.

[0330] That is, in Figure 6A During the large cleaning mode shown, the first outlet hole 368 is opened by the switching valve 358 and the second outlet hole 370 is closed by the switching valve 358 as the second ball chain 56 lifts the valve 358 and slides upward.

[0331] On the other hand, Figure 6B In the small cleaning mode shown, the switching valve 358 is not lifted by the second ball chain 56, the first outlet hole 368 is closed by the switching valve 358, and the second outlet hole 370 is opened by the switching valve 358.

[0332] Furthermore, in the large cleaning mode, the total opening area S1 of the first outflow hole 368 opened by the switching valve 358 is the same as the total opening area S2 of the second outflow hole 370 opened by the switching valve 358 in the small cleaning mode (S1 = S2).

[0333] Furthermore, in the drain valve device 300 of this embodiment, similar to the drain valve devices 1, 100, and 200 of the first to third embodiments of the present invention described above, when the large washing mode is started, the water level W1 in the water tank 12 outside the water tank 362 decreases and drops to a level lower than the water level W2 in the water tank 362.

[0334] Subsequently, if the water level W1 in the water storage tank 12 drops to a position lower than the upper end of the first outlet hole 368, the first amount of washing water Q1 (L / min) (the so-called "drainage speed Q1") flowing from the first outlet hole 368 into the water storage tank 12 per unit time of the water storage cylinder 362 will accelerate.

[0335] On the other hand, if the small cleaning mode is started, the water level W1 in the water tank 12 outside the water tank 362 will decrease and drop to a level lower than the water level W2 in the water tank 362.

[0336] Subsequently, if the water level W1 in the water storage tank 12 drops to a position lower than the upper end of the second outlet hole 370, the second amount of washing water Q2 (L / min) (the so-called "drainage speed Q2") flowing from the second outlet hole 370 into the water storage tank 12 per unit time of the water storage cylinder 362 will accelerate.

[0337] Therefore, in the small washing mode, the second washing water volume Q2 (L / min) (so-called "drainage speed Q2") of the washing water in the water tank 362 flowing out from the second outlet 370 to the water tank 12 per unit time is set to be greater than the first washing water volume Q1 (L / min) (so-called "drainage speed Q1") of the washing water in the water tank 362 flowing out from the first outlet 368 to the water tank 12 per unit time in the large washing mode (Q1 < Q2).

[0338] According to the drain valve device 300 of the fourth embodiment of the present invention described above, when the valve body 36 is opened in the large washing mode, the washing water in the water storage cylinder 362 flows out from the first outlet hole 368 to the water storage tank 12.

[0339] On the other hand, when the valve body 36 is opened in the small washing mode, the washing water in the water storage tank 362 flows out from the second outlet hole 370 to the water storage tank 12.

[0340] At this time, even if the total opening areas S1 and S2 of the first outlet hole 368 and the second outlet hole 370 are the same, since the second outlet hole 370 is located above the first outlet hole 368, the second washing water volume Q2 (L / min) (so-called "second drainage speed Q2") per unit time of the washing water in the water tank 362 flowing out of the second outlet hole 370 to the water tank 12 in the small washing mode can be set to be greater than the first washing water volume Q1 (L / min) (so-called "first drainage speed Q1") per unit time of the washing water in the water tank 362 flowing out of the first outlet hole 368 to the water tank 12 in the large washing mode.

[0341] Therefore, the descent speed v2 of float 72 in small cleaning mode can be greater than the descent speed v1 of float 72 in large cleaning mode. Thus, the descent time of float 72 or the opening time of valve body 36 in small cleaning mode can be shorter than the descent time of float 72 or the opening time of valve body 36 in large cleaning mode.

[0342] As a result, by changing the amount of washing water Q1, Q2 (L / min) flowing from the outlet 368 or outlet 370 into the water tank 12 per unit time (the so-called "drainage speed Q1, Q2") according to the selected large washing mode or small washing mode, it is possible to change the descent speed v1, v2 of the float 72 as the water level in the water tank 362 decreases.

[0343] Therefore, even in the smaller wash mode, which uses less water than the larger wash mode, the instantaneous flow rate (L / min) of the wash water, which affects the washing performance, can be maintained at a relatively high level. In addition, the closing sound generated when the valve body 36 closes the drain port 18 can also be reduced.

[0344] It should be noted that in the drain valve devices 1, 100, 200, and 300 of the first to fourth embodiments of the present invention described above, the method of changing the descent speed v1 and v2 of the float 72 as the water level in the water tanks 62, 162, 262, and 362 decreases according to the selected large or small washing mode, and changing several forms of the amount of washing water Q1 and Q2 (L / min) (the so-called "drainage speed Q1 and Q2") flowing from the outlet holes 68, 70, 168, 170, 268, 270, 368, and 370 into the water tank 12 per unit time, has been described. However, it is not limited to these examples, and other forms other than changing the so-called "drainage speed" can also be applied.

[0345] For example, as another form, the total outflow (L) (so-called "drainage") of the washing water in the water tank can be changed from the outlet hole to the water tank according to the selected large washing mode or small washing mode.

[0346] Alternatively, as another form, the buoyancy of the washing water in the water tank or water cylinder acting on the float can be changed according to the selected large or small washing mode.

[0347] Next, refer to Figure 1 and Figures 7 to 11B The drain valve device 400 of the fifth embodiment of the present invention will be described.

[0348] Among them, Figures 7 to 11B In the drain valve device 400 of the fifth embodiment of the present invention shown, the same reference numerals are added to the parts that are the same as those in the drain valve devices 1, 100, 200, and 300 of the first to fourth embodiments of the present invention described above, and their descriptions are omitted.

[0349] In addition, Figure 11A and Figure 11B In each of the large and small cleaning modes shown, the drain valve device 1 is set to state (I) to (VI) before the valve body 36 is opened (standby state). Then, the valve body 36 is set to state (II) to (V) in time sequence, and the valve body 36 is set to state (VI) when it is closed.

[0350] First, such as Figures 7 to 10 As shown, the drain valve device 400 of this embodiment has a water storage cylinder 462 comprising a water storage cylinder body 468 and a small water tank 470, which is communicatively connected to the water storage cylinder body 468. Through each of these water storage cylinder bodies 468 and small water tanks 470, a portion of the washing water in the water storage tank 12 can be stored.

[0351] Furthermore, the side wall portion 468a of the water storage cylinder body 468 is provided with an outlet hole 472 for the washing water inside the water storage cylinder body 468 to flow out to the outside (inside the water storage tank 12). The outlet hole 472 is always open and always connects the inside of the water storage cylinder body 468 with the water storage tank 12 outside the water storage cylinder body 468.

[0352] Furthermore, a float 474 is disposed inside the main body 468 of the water storage cylinder. The float 474 is concentrically arranged on the outer periphery of the working shaft 54 ​​and moves up and down in conjunction with the water level inside the main body 468 of the water storage cylinder, so that the buoyancy obtained by the washing water inside the main body 468 of the water storage cylinder can act on the working shaft 54.

[0353] Next, as Figures 7 to 11BAs shown, a connecting opening 476 is provided at the connection part of the small water tank 470 connected to the side wall portion 468a of the water storage cylinder body 468, and the connecting opening 476 can communicate with the water storage cylinder body 468.

[0354] In addition, the connecting opening 476 is provided with a partition (switching valve 458) for switching between large and small washing in a manner that can be opened or closed.

[0355] like Figures 7 to 11A As shown, when the toilet is in the large washing mode, the second ball chain 56 is not lifted and relaxed by the second swing rod 50, so the partition (switching valve 458) for switching between large and small washing modes changes to the direction C1 of opening the communication opening 476, thereby opening the communication opening 476.

[0356] Thus, during the large cleaning mode, the main body of the water storage tank 468 and the small water tank 470 are connected to each other through the open communication opening 476.

[0357] On the other hand, such as Figures 7 to 10 and Figure 11B As shown, when the toilet is in the small washing mode, the second ball chain 56 is lifted by the second swing rod 50, so that the partition (switching valve 458) for switching between small and large washing modes changes to the direction C2 of closing the communication opening 476, thereby closing the communication opening 476.

[0358] Thus, in the small washing mode, the water storage cylinder body 468 and the small water tank 470 are separated from each other by the switching valve 458 that closes the connecting opening 476.

[0359] Next, as Figures 8 to 10 As shown, locking portions 478 are provided on the left and right sides and the lower end of the edge portion in the connecting opening 476, which rotatably support the switching valve 458.

[0360] The locking part 478 is configured such that, in the small washing mode, the switching valve 458 rotates in the direction C2 toward the closed communication opening 476 and contacts the locking part 478, thereby restricting the rotation of the switching valve 458 by the locking part 478.

[0361] Next, as Figures 8 to 10 As shown, the switching valve 458 includes a valve body 480 and a water hammer section 482.

[0362] First, with the switching valve 458 closed and the connecting opening 476 closed, due to the lifting force of the second swing rod 50 and the second ball chain 56 and the water pressure of the washing water in the small water tank 470, the valve body 480 of the switching valve 458 is in a vertical position where the entire valve body 480 extends in the vertical direction, and the left, right and lower peripheral parts of the valve body 480 are in contact with the locking part 478.

[0363] Furthermore, multiple (two) water hammer sections 482 of the switching valve 458 are provided on the upper side of the valve body 480 in an upright position and on the side of the small water tank 470. Each of these water hammer sections 482 can store washing water in the water hammer section 482 while the valve body 480 is in an upright position.

[0364] Furthermore, such as Figure 9 As shown, a pair of auxiliary outflow holes 484 are provided on the bottom surface of the small water tank 470 to allow the washing water in the small water tank 470 to flow out.

[0365] Furthermore, when the valve body 480 is in an upright position abutting against the locking part 478, the water hammer part 482 can store washing water. At this time, each of the auxiliary outlet holes 484 of the small water tank 470 is open by the valve body 480.

[0366] Furthermore, if the washing water in the small water tank 470 flows out from each of the auxiliary outlet holes 484, the water pressure in the small water tank 470 is reduced by pushing the valve body 480 in the direction of closing the valve. Therefore, the valve body 480 rotates in the direction away from the locking part 478 (the direction of opening the valve).

[0367] Therefore, the valve body 480 and the water hammer part 482 can easily rotate from an upright position to a lying position by the weight of the water hammer part 482 itself.

[0368] Furthermore, due to the tilt of the water hammer section 482, the washing water inside the water hammer section 482 flows out, affecting the valve body section 480 and the water hammer section 482 (see reference). Figure 10 The imaginary lines (symbols 480, 482) indicate a transition towards a prone (horizontal) posture.

[0369] Furthermore, if the valve body 480 and the water hammer 482 are in a folded (horizontal) position, each auxiliary outlet 484 is closed by the lower side of the folded water hammer 482.

[0370] Furthermore, during the standby period before starting the large and small washing modes (refer to...) Figure 11A and Figure 11B When in the initial position P0 of state (Ⅰ), the valve body 480 and water hammer part 482 of the switching valve 458 are in a lying posture (horizontal posture).

[0371] Furthermore, even in Figure 11A After the standby period shown in state (Ⅰ), execute Figure 11A During the large cleaning mode shown in states (II) to (VI), the valve body 480 and water hammer 482 of the switching valve 458 are also in the initial position P0 and remain in a lying posture (horizontal posture).

[0372] Furthermore, when the valve body 480 and water hammer 482 of the switching valve 458 are in the initial position P0 in a folded (horizontal) position, the valve body 480 of the switching valve 458 does not abut against the locking part 478, thus opening the communication opening 476 and closing each auxiliary outflow hole 484.

[0373] Furthermore, when the valve body 480 and the water hammer section 482 are in a tilted (horizontal) position, due to the open end 482a at the front end of the water hammer section 482 (refer to...) Figure 8 The water tank 470 is oriented horizontally, so the washing water in the small water tank 470 can flow from the opening end 482a into the water hammer section 482, and the washing water can be stored in the water hammer section 482.

[0374] On the other hand, in execution Figure 11B During the small cleaning mode shown in states (II) to (VI), if the valve body 480 and water hammer 482 of the switching valve 458 are rotated from the initial position P0 and come into contact with the locking part 478, and the cleaning water in the small water tank 470 flows out from each auxiliary outlet hole 484 after maintaining the closed communication opening 476, the valve body 480 and water hammer 482 rotate toward the initial position P0 while the cleaning water in the water hammer 482 flows out, and then return to the initial position P0 of the standby state (I).

[0375] Next, as Figures 8 to 10 As shown, the upper edge 468b of the water storage cylinder body 468, the upper edge 470a of the small water tank 470, and the upper end 478a of the locking part 478 are coplanar with each other.

[0376] In addition, such as Figure 8 and Figure 10 As shown, when the switching valve 458 closes the communication opening 476, the upper end 458a of the switching valve 458 (valve body 480 and water hammer part 482) protrudes upward more than the upper edge of the communication opening 476 and the upper edge 470a of the small water tank 470.

[0377] Based on the structure of the drain valve device 400 of this embodiment, in Figure 11A In the large washing mode of states (Ⅲ) to (Ⅵ), the first total outflow (first drainage volume) Q401 (L) of the washing water from the water tank 462 flowing out of the outlet 472 into the water tank 12 is greater than that in the state of state (Ⅲ) to (Ⅵ). Figure 11BIn the small washing mode of states (Ⅲ) to (Ⅵ), the washing water of the water storage cylinder 462 flows out from the outlet hole 472 into the water storage tank 12, which is the second total outflow (second drainage) Q402 (L) (Q401>Q402).

[0378] Next, through Figures 7 to 11B The operation of the drain valve device 400 in this embodiment will be explained.

[0379] First, through Figures 7 to 11A The large-scale cleaning mode performed by the drain valve device 400 of this embodiment will be described.

[0380] like Figure 7 and Figure 11A As shown, when starting the deep cleaning mode from standby state (Ⅰ), for example, if the user uses... Figure 7 Rotating the control lever 34 90 degrees to the front will only put it in position 34. Figure 7 The first swing lever 48 swings in the initial position (standby state) shown, and only the first ball chain 52 is lifted.

[0381] As a result, the working shaft 54 ​​and valve body 36 of the drain valve device 400 are lifted and move upward in a straight line via the first ball chain 52, thereby the float 474 is also lifted integrally via the working shaft 54 ​​(see reference). Figure 11A State (II)).

[0382] On the other hand, since the second ball chain 56 is not lifted by the second swing rod 50, the switching valve 58 is in the initial position P0 and is rotated to the open communication opening 476 of the water storage tank 462, and the water storage tank body 468 and the small water tank 470 are in communication (see reference). Figure 11A State (II)).

[0383] Afterwards, until the deep cleaning mode ends, the main body of the water storage tank 468 and the small water tank 470 remain in constant communication (refer to...). Figure 11B (States (II) to (VI)).

[0384] Furthermore, at this time, such as Figure 11A As shown in state (II), the float 474 and valve body 36 are in the highest position, and the drain outlet 18 of the water storage tank 12 is opened by the rising valve body 36, and the washing water begins to be discharged from the water storage tank 12 to the drain outlet 18.

[0385] After that, as Figure 11AAs shown in states (Ⅲ) to (Ⅴ), if the water level W1 in the water storage tank 12 decreases and further decreases to a level lower than the upper end of the water storage cylinder 462, the water pressure generated by the water level W2 in the water storage cylinder 462 is higher than the water pressure generated by the water level W1 in the water storage tank 12 outside the water storage cylinder 462. Therefore, the washing water in the water storage cylinder 462 flows out from the outlet hole 472 into the water storage tank 12 outside the water storage cylinder 462.

[0386] And, as Figure 11A As shown in states (III) and (IV), the water level W2 in the water storage cylinder 462 is higher than the water level W1 in the water storage tank 12 outside the water storage cylinder 462. However, since the washing water in the water storage cylinder 462 continues to flow out from the outlet hole 472, the water level W2 in the water storage cylinder 462 gradually decreases, and the float 474 also decreases in conjunction with the decrease in water level W2.

[0387] Next, as Figure 11A As shown in state (V), if the water level W1 in the water tank 12 outside the water storage cylinder 462 drops to a level lower than the upper end of the outlet hole 472 of the water storage cylinder 462, then the outside of the outlet hole 472 of the water storage cylinder 462 will open to the atmosphere.

[0388] As a result, the speed at which the washing water in the water storage tank 462 flows out of the outlet hole 472 increases, and the water level W2 in the water storage tank 462 drops further. Consequently, the float 474 also drops, and the working shaft 54 ​​and valve body 36 also drop as a whole.

[0389] Then, as Figure 11A As shown in state (VI), if valve body 36 is in contact with valve seat 66, drain port 18 will close.

[0390] Therefore, the discharge of cleaning water from the water storage tank 12 to the drain outlet 18 stops, and the supply of cleaning water from the cleaning water tank device 402 to the toilet body 8 in the large cleaning mode ends.

[0391] At this time, the float 474, the working shaft 54 ​​and the valve body 36 are in a stopped state, and the lowest water level DWL1 in the water storage tank 12 (the so-called "static water line" drainage stop water level) is located below the lower end of the outlet hole 472 of the water storage cylinder 462.

[0392] Therefore, the washing water in the water storage cylinder 462 continues to flow out from the outlet hole 472 to the water storage tank 12, and only the water level W2 in the water storage cylinder 462 gradually decreases, and the water pressure in the water storage cylinder 462 also decreases.

[0393] In addition, during the standby state from the end of the major cleaning mode to the start of the next cleaning mode, the switching valve 458 is in the state of opening the connecting opening 476, maintaining the state of mutual connection between the water storage tank body 468 and the small water tank 470.

[0394] Next, through Figures 7 to 10 and Figure 11B The small washing mode performed by the drain valve device 400 of this embodiment will be described.

[0395] From Figure 7 and Figure 11B When the user starts the small cleaning mode from standby state (Ⅰ), for example, if the user... Figure 7 When the control lever 34 shown is rotated 90 degrees inward, it is in the position... Figure 7 The first swing lever 48 and the second swing lever 50, in the initial position (standby state) shown, swing respectively, and the first ball chain 52 and the second ball chain 56 are lifted respectively.

[0396] Thus, the working shaft 54 ​​and valve body 36 of the drain valve device 1 are lifted and move upward in a straight line via the first ball chain 52, thereby the float 474 is also lifted integrally via the working shaft 54 ​​(see reference). Figure 11B State (II)).

[0397] In addition, the switching valve 458 for switching between large and small washing is lifted via the second ball chain 56, and the switching valve 458 rotates from the state of opening the communication opening 476 of the water storage tank 462 (initial position P0) to the direction of closing the communication opening 476 C2.

[0398] Therefore, from the time the connecting opening 476 of the small water tank 470 is closed by the switching valve 458 until the end of the small washing mode, the water storage cylinder body 468 and the small water tank 470 are kept separated by the switching valve 458 (see reference). Figure 11B (States (II) to (VI)).

[0399] In addition, Figure 11B In state (II), the float 474 and valve body 36 are in the highest position, and the drain outlet 18 of the water storage tank 12 is opened by the rising valve body 36, and the washing water begins to be discharged from the water storage tank 12 to the drain outlet 18.

[0400] After that, as Figure 11BAs shown in states (Ⅲ) to (Ⅴ), if the water level W1 in the water storage tank 12 becomes lower than the water level at the top of the water storage cylinder 462, the water pressure generated by the water level W2a in the water storage cylinder body 468 is higher than the water pressure generated by the water level W1 in the water storage tank 12 outside the water storage cylinder body 468. Therefore, the washing water in the water storage cylinder body 468 flows out from the outlet hole 472 into the water storage tank 12 outside the water storage cylinder body 468.

[0401] Then, in Figure 11B In states (Ⅲ) to (Ⅴ), since the water level W2a inside the main body of the water storage cylinder 468 is higher than the water level W1 inside the water storage tank 12 outside the main body of the water storage cylinder 468, the washing water inside the water storage cylinder 462 continues to flow out from each outlet hole 472.

[0402] As a result, the water level W2 in the water storage cylinder 462 gradually decreases, and the float 474 also decreases in conjunction with the decrease in water level W2.

[0403] Among them, Figure 11B In states (Ⅲ) to (Ⅴ), the water level W2a in the main body of the water storage cylinder 468 is lower than the water level W2b in the small water tank 470, and the water pressure in the small water tank 470 is higher than the water pressure in the main body of the water storage cylinder 468.

[0404] Therefore, because the switching valve 458 is pushed by the water pressure in the small water tank 470 towards the direction of C2 to close the connecting opening 476, the connecting opening 476 of the small water tank 470 is closed by the switching valve 458, and the water storage cylinder body 468 and the small water tank 470 remain separated by the switching valve 458.

[0405] And, as Figure 11B As shown in state (VI), if valve body 36 contacts valve seat 66, drain outlet 18 closes, stopping the discharge of washing water from water storage tank 12 to drain outlet 18.

[0406] Thus, the supply of washing water from the washing water tank device 402 to the toilet body 8 in the small washing mode ends.

[0407] at this time, Figure 11B In the small wash mode of state (VI), the lowest water level DWL2 (the so-called "static water line" or drain stop water level) in the water tank 12 is located at a level higher than that in the small wash mode. Figure 11A The water level in the water tank 12 during the large wash mode in state (VI) is above the lowest water level DWL1.

[0408] That is, the amount of washing water discharged from the water tank 12 to the drain outlet 18 in the small washing mode is lower than the amount of washing water discharged from the water tank 12 to the drain outlet 18 in the large washing mode by the amount corresponding to the lower water level DWL2 in the small washing mode being higher than the lower water level DWL1 in the large washing mode.

[0409] Furthermore, in Figure 11A In the large-scale cleaning mode from state (III) to (VI), the first total outflow (first drainage volume) Q401 (L) of the cleaning water from the water tank 462 flowing out of the outlet 472 into the water tank 12 is greater than that in the large-scale cleaning mode from state (III) to state (VI). Figure 11B In the small washing mode from state (Ⅲ) to (Ⅵ), the washing water of the water tank 462 flows out from the outlet 472 into the water tank 12, which is the second total outflow (second drainage) Q402 (L) (Q401>Q402).

[0410] According to the drain valve device 400 of the fifth embodiment of the present invention described above, when the toilet 4 is started to be washed, firstly, based on the selection of either the large washing mode or the small washing mode, the working shaft 54 ​​of the drain valve device 400 is raised, thereby raising the valve body 36 (opening the valve), and the washing water in the water storage tank 12 is supplied from the drain outlet 18 to the water guide path 8a of the toilet body 8 of the toilet 4.

[0411] Furthermore, the water level W2 in the water tank 462 decreases depending on the selected large or small washing mode, and as the water level W2 decreases, the float 474 in the water tank 462 descends.

[0412] As a result, the working shaft 54 ​​of the drain valve device 400 descends, thereby causing the valve body 36 to descend (close the valve), stopping the supply of washing water from the water storage tank 12 to the toilet 4, and ending the washing process of the toilet 4.

[0413] At this time, the first total outflow Q401 (L) of the washing water in the water tank 462 flowing out of the outlet 472 to the water tank 12 in the large washing mode is greater than the second total outflow Q402 (L) of the washing water in the water tank 462 flowing out of the outlet 472 to the water tank 12 in the small washing mode (Q401 > Q402).

[0414] Therefore, the descent speed v2 of float 474 in small cleaning mode can be greater than the descent speed v1 of float 474 in large cleaning mode (v2 > v1).

[0415] Therefore, the descent time of float 474 or the opening time of valve body 36 in the small cleaning mode can be shorter than the descent time of float 474 or the opening time of valve body 36 in the large cleaning mode.

[0416] As a result, by changing the amount of washing water flowing from the outlet hole 472 to the water tank 12 in the water storage tank 462 according to the selected large washing mode or small washing mode (so-called "drainage volume Q401, Q402"), it is possible to change the descent speed v1, v2 of the float 474 as the water level W2 in the water storage tank 462 decreases.

[0417] Therefore, even in the small wash mode, which uses less wash water than the large wash mode, the flow rate of wash water per unit time (hereinafter referred to as "instantaneous flow rate") (L / min) that affects the wash performance can be maintained at a relatively high level. In addition, the closing sound generated when the valve body 36 closes the drain port 18 can also be reduced.

[0418] Furthermore, according to the drain valve device 400 of this embodiment, the small water tank 470, which is connected to the water storage cylinder body 468, includes: a communication opening 476 that communicates with the water storage cylinder body 468; and a switching valve 458 for switching between large and small washing, which opens or closes the communication opening 476.

[0419] Thus, in the large washing mode, the switching valve 458 can connect the water storage tank body 468 to the small water tank 470 by opening the communication opening 476.

[0420] On the other hand, in the small washing mode, the switching valve 458 of the small water tank 470 can separate the main body of the water storage cylinder 468 from the small water tank 470 by closing the communication opening 476.

[0421] As a result, since the first total outflow Q401(L) of the washing water in the water tank 462 flowing out of the outlet 472 to the water tank 12 in the large washing mode is greater than the second total outflow Q402(L) of the washing water in the water tank 462 flowing out of the outlet 472 to the water tank 12 in the small washing mode, the descent speed v2 of the float 474 in the small washing mode is greater than the descent speed v1 of the float 474 in the large washing mode.

[0422] Therefore, the descent time of float 474 or the opening time of valve body 36 in the small cleaning mode can be shorter than the descent time of float 474 or the opening time of valve body 36 in the large cleaning mode.

[0423] As a result, by selecting the large or small washing mode, the amount of washing water flowing from the outlet 472 into the water tank 12 from the water storage tank 462 is changed by altering the amount of washing water Q401, Q402(L) (the so-called "drainage amount Q401, Q402"), thereby changing the descent speed v1, v2 of the float 474 as the water level in the water storage tank 462 decreases.

[0424] Therefore, even in the small wash mode, where the wash water volume is less than that of the large wash mode, the instantaneous flow rate (L / min) of the wash water, which affects the wash performance, can be maintained at a relatively high level. In addition, the closing sound generated when the valve body 36 closes the drain port 18 can also be reduced.

[0425] Furthermore, according to the drain valve device 400 of this embodiment, assuming that the switching valve 458 for switching between large and small washing is not rotated relative to the connecting opening 476, but is slidably (slidably) arranged relative to the connecting opening 476, when the connecting opening 476 is closed by the switching valve 458, the sealing part in contact with the connecting opening 476 is repeatedly slid due to the opening or closing of the switching valve 458 relative to the connecting opening 476, and therefore there is a risk of damage due to wear, etc.

[0426] However, according to the drain valve device 400 of this embodiment, the switching valve 458 is rotatably provided relative to the connecting opening 476, and can rotate in the direction C1 of opening the connecting opening 476 in the large washing mode, and rotate in the direction C2 of closing the connecting opening 476 in the small washing mode.

[0427] Therefore, compared to the form in which the switching valve 458 slides open or closed relative to the connecting opening 476, the number of parts can be reduced, and the risk of the switching valve 458 constantly contacting the connecting opening 476 regardless of the cleaning mode can be avoided.

[0428] This reduces the risk of damage to the part (sealing part) that contacts the switching valve 458 when the small water tank 470's connecting opening 476 is closed due to wear or other factors.

[0429] Furthermore, according to the drain valve device 400 of this embodiment, the connecting opening 476 of the small water tank 470 has a locking part 478, which is provided at the edge of the connecting opening 476 and rotatably supports the switching valve 458.

[0430] Therefore, in the small cleaning mode, when the switching valve 458 rotates in the direction C2 toward the closed communication opening 476 and comes into contact with the locking part 478, the locking part 478 can reliably restrict the rotation of the switching valve 458.

[0431] Furthermore, in the small washing mode, since the switching valve 458 and the edge of the connecting opening 476 can reliably contact and seal through the locking part 478 when the switching valve 458 is in contact with the locking part 478, the water tightness between the water storage cylinder body 468 and the small water tank 470 can be improved.

[0432] Therefore, in the small washing mode, the washing water in the small water tank 470 can be reliably prevented from flowing into the water storage cylinder body 468 from the connecting opening 476.

[0433] Furthermore, according to the drain valve device 400 of this embodiment, the switching valve 458 has a pair of water hammer portions 482 for storing washing water, and a pair of auxiliary outflow holes 484 are provided on the bottom surface of the small water tank 470 to allow the washing water in the small water tank 470 to flow out.

[0434] Therefore, with the switching valve 458 abutting against the locking part 478, the water hammer part 482 can store the washing water, and the washing water in the small water tank 470 flows out from the auxiliary outlet hole 484.

[0435] Furthermore, the washing water in the small water tank 470 flows out from the auxiliary outlet hole 484, thereby enabling the switching valve 458 to rotate in the direction away from the locking part 478 (direction C1 of opening the communication opening part 476), so that the washing water in the water hammer part 482 flows out.

[0436] Therefore, by utilizing the changes in water level in the small water tank 470 and the changes in the amount of washing water stored in the water hammer section 482, a series of rotational actions can be reliably and smoothly performed from the state where the switching valve 458 closes the communication opening 476 of the small water tank 470 to the state where the communication opening 476 is opened.

[0437] Furthermore, according to the drain valve device 400 of this embodiment, the switching valve 458 is not in a horizontal position (lying down) abutting against the locking part 478 in the initial position P0, the connecting opening 476 is open and the water hammer part 482 is not storing washing water, during the standby period when no washing mode is executed (refer to Figure 11A and Figure 11B State (Ⅰ)) and during the execution of the deep cleaning mode (refer to Figure 11A In states (II) to (VI), the switching valve 458 remains in the initial position P0. As a result, the auxiliary outlet 484 of the small water tank 470 is closed by the switching valve 458, allowing the washing water to be stored in the small water tank.

[0438] On the other hand, during the execution of the small cleaning mode (refer to...) Figure 11B In states (II) to (VI), the switching valve 458 rotates from the initial position P0 toward the direction C2 of the closed communication opening 476 and contacts the locking part 478, thereby maintaining the state of the closed communication opening 476.

[0439] Afterwards, if the washing water in the small water tank 470 flows out from the auxiliary outlet hole 484, the switching valve 458 can rotate from the closed communication opening 476 toward the initial position P0 while allowing the washing water in the water hammer section 482 to flow out, and then return to the initial position P0.

[0440] As a result, by more effectively changing the amount of washing water Q401, Q402 (so-called "drainage Q401, Q402") flowing from the outlet 472 to the water tank 12 in the water storage tank 462 according to the selected large washing mode or small washing mode, it is possible to more effectively change the descent speed v1, v2 of the float 474 as the water level W2 in the water storage tank 462 decreases.

[0441] Furthermore, according to the drain valve device 400 of this embodiment, such as Figure 8 and Figure 10 As shown, the upper edge 468b of the water storage cylinder body 468 and the upper edge 470a of the small water tank 470 are coplanar.

[0442] In addition, such as Figure 10 As shown, when the switching valve 458 closes the connecting opening 476 of the small water tank 470, the upper end 458a of the switching valve 458 protrudes upward more than the upper edge of the connecting opening 476 and the upper edge 470a of the small water tank 470.

[0443] Therefore, with the switching valve 458 closing the communication opening 476, it is possible to reliably prevent the washing water in the small water tank 470 from overflowing the upper end 458a of the switching valve 458 and flowing into the water storage tank body 468.

[0444] Next, refer to Figure 1 and Figures 12 to 13B The drain valve device 500 of the sixth embodiment of the present invention will be described.

[0445] Among them, Figures 12 to 13B In the drain valve device 500 of the sixth embodiment of the present invention shown, the same reference numerals are added to the parts that are the same as those in the drain valve devices 1, 100, 200, 300 and 400 of the first to fifth embodiments of the present invention described above, and their descriptions are omitted.

[0446] like Figure 12 As shown, in the drain valve device 500 of this embodiment, when the toilet is started in the deep cleaning mode, if the operating lever 34 is moved around the rotation center axis A1 to one side ( Figure 12 When the lever 34 is rotated by a specified angle (e.g., 90 degrees), the outer rotating shaft 40 and the inner rotating shaft 42 connected to the operating lever 34 rotate to one side, and the rotating main shaft 44 of the lifting working part 38 rotates around the rotation center axis A2 to one side.

[0447] Therefore, the cylindrical rotating part 46 of the lifting working part 38 is also integral with the rotating main shaft part 44 around the rotation center axis A2 to one side ( Figure 12The first swing lever 48 rotates to one side in a manner that lifts the first ball chain 52 (with the front side of the middle), and the first swing lever 48 rotates to one side in a manner that lifts the first ball chain 52. Figure 12 The first swing arm 50 swings (rotates) while the second swing arm 50 does not swing, and the second ball chain 56 is not lifted.

[0448] On the other hand, when starting the toilet in the gentle wash mode, if... Figure 12 The operating lever 34 shown moves about the rotation center axis A1 to the other side ( Figure 12 When the inner side of the lever 34 is rotated by a specified angle (e.g., 90 degrees), the outer rotating shaft 40 and the inner rotating shaft 42 connected to the operating lever 34 rotate to the other side, and the rotating main shaft 44 of the lifting working part 38 rotates to the other side around the rotation center axis A2.

[0449] Therefore, the cylindrical rotating part 46 of the lifting working part 38 is also integral with the rotating main shaft part 44 around the rotation center axis A2 to the other side. Figure 12 The first swing lever 48 rotates to the other side by lifting the first ball chain 52 (inside). Figure 12 The second swing lever 50 swings (rotates) to the inside of the middle, and the second swing lever 50 lifts the second ball chain 56 to the other side. Figure 2 (Inside) swing (rotate).

[0450] Next, as Figure 12 As shown, the drain valve device 500 of this embodiment includes: a water storage cylinder 62, which is disposed above the drain outlet forming portion 60; and an overflow pipe 560a, which is connected to the drain outlet 18.

[0451] In addition, an outlet hole 68 is provided on one of the side walls 62a of the water storage cylinder 62 (the left side wall 62a when viewed from the front side) to allow the washing water in the water storage cylinder 62 to flow out to the outside.

[0452] In addition, such as Figure 12 As shown, the outlet 68 of the water tank 62 is always open, regardless of whether it is a large or small wash mode. The upper part of the float 572 is provided with a storage section 574 for storing wash water. The storage section 574 includes: a peripheral wall 576 surrounding the storage section 574; an outlet 578 formed in part of the peripheral wall 576; and a partition (a switching valve 558 for switching between large and small wash modes), which is configured to be able to open or close relative to the outlet 578.

[0453] Furthermore, in the large cleaning mode, the switching valve 558 opens the outlet 578 of the peripheral wall portion 576 in the storage portion 574 of the float 572, thereby allowing the cleaning water in the storage portion 574 to flow out from the outlet 578.

[0454] On the other hand, in the small washing mode, the switching valve 558 closes the outlet 578 of the peripheral wall portion 576 in the storage portion 574 of the float 572 and maintains the state of the washing water stored in the storage portion 574, so that the storage portion 574 functions as a water hammer.

[0455] Therefore, the amount of washing water stored in the storage section 574 in the small washing mode is greater than that in the large washing mode. Consequently, the weight of the storage section 574 in the small washing mode is also greater than that in the large washing mode, and the buoyancy obtained by the float 572 in the small washing mode is less than that in the large washing mode.

[0456] And, as Figure 13A As shown, when the toilet is being cleaned in the large cleaning mode, the switching valve 558 is loosened because the second ball chain 56 is not lifted by the second swing rod 50.

[0457] In addition, such as Figure 13A As shown, the switching valve 558 opens the outlet 578 of the storage section 574 of the float 572 without being lifted by the second ball chain 56.

[0458] Therefore, the storage section 574 of the float 572 does not contain any washing water.

[0459] On the other hand, such as Figure 13B As shown, when the toilet is in the small cleaning mode, the switching valve 558 is lifted because the second ball chain 56 is lifted by the second swing rod 50.

[0460] In addition, the switching valve 558 is lifted by the second ball chain 56 and closes the outlet 578 of the storage section 574 of the float 572.

[0461] Thus, the storage section 574 of the float 572 stores the washing water.

[0462] Therefore, since the storage section 574 functions as a water hammer in the small washing mode and is difficult to function as a water hammer in the large washing mode, the buoyancy obtained by the float 572 in the small washing mode is smaller than that obtained in the large washing mode.

[0463] Therefore, in each of the large and small washing modes, the water level W2 in the water tank 62 and the equilibrium position of the float 572 change according to the selected washing mode. As a result, the descent time T2 of the float 572 in the small washing mode is shorter than the descent time T1 of the float 572 in the large washing mode (T2 < T1).

[0464] Next, through Figures 12 to 13B The operation of the drain valve device 500 according to the sixth embodiment of the present invention will be described.

[0465] First, through Figure 12 and Figure 13A The large-scale cleaning mode performed by the drain valve device 500 in this embodiment will be described.

[0466] From Figure 12 and Figure 13A When the standby state (Ⅰ) starts the deep cleaning mode, for example, if the user uses... Figure 12 Rotating the control lever 34 90 degrees to the front will only put it in position 34. Figure 12 The first swing lever 48 swings in the initial position (standby state) shown, and only the first ball chain 52 is lifted.

[0467] As a result, the working shaft 54 ​​and valve body 36 of the drain valve device 500 are lifted and move upward in a straight line via the first ball chain 52, thereby the float 572 is also lifted integrally via the working shaft 54 ​​(see reference). Figure 13A State (II)).

[0468] At this time, since the second ball chain 56 is not lifted by the second swing lever 50, the switching valve 58 is not lifted by the second ball chain 56, and is rotated to the state of opening the outlet 578 of the storage section 574 of the float 572 (see reference). Figure 13A State (II)).

[0469] It should be noted that the state of the outlet 578 of the storage section 574 of the switching valve 558 opening the float 572 remains thereafter until the end of the major cleaning mode (see reference). Figure 13A (States (II) to (VI)).

[0470] Therefore, in Figure 13A In state (II), the float 572 and valve body 36 are in the highest position, and the drain outlet 18 of the water storage tank 12 is opened by the raised valve body 36. Furthermore, the washing water in the water storage tank 12 is discharged to the drain outlet 18.

[0471] After that, as Figure 13A As shown in state (Ⅲ), if the water level W1 in the water storage tank 12 drops to near the upper end of the water storage cylinder 62, and then further drops to a water level lower than the upper end of the water storage cylinder 62, the water pressure generated by the water level W2 in the water storage cylinder 62 is higher than the water pressure generated by the water level W1 in the water storage tank 12. Therefore, the washing water in the water storage cylinder 62 flows out from the outlet hole 68.

[0472] And, as Figure 13AAs shown in states (Ⅳ) and (Ⅴ), the water level W2 in the water storage cylinder 62 is higher than the water level W1 in the water storage tank 12, and the washing water in the water storage cylinder 62 continuously flows out from the outlet hole 68. Therefore, the water level W2 in the water storage cylinder 62 gradually decreases, and the float 572 also decreases in conjunction with the decrease in the water level W2.

[0473] Next, as Figure 13A As shown in state (VI), if the water level W1 in the water storage cylinder 62 and the water tank 12 drops to a level lower than the upper end of the outlet hole 68 of the water storage cylinder 62, then the outside of the outlet hole 68 of the water storage cylinder 62 will open to the atmosphere.

[0474] As a result, the speed at which the washing water in the water storage tank 62 flows out of the outlet hole 68 increases, the water level W2 in the water storage tank 62 drops further, the float 572 also drops, and the working shaft 54 ​​and valve body 36 also drop as a whole.

[0475] Then, if the valve body 36 contacts the valve seat 66, the drain outlet 18 closes, stopping the discharge of washing water from the water storage tank 12 to the drain outlet 18.

[0476] Thus, the supply of washing water from the washing water tank device 502 to the toilet body 8 in the large washing mode ends.

[0477] Next, through Figure 12 and Figure 13B The small washing mode performed by the drain valve device 500 of the sixth embodiment of the present invention will be described.

[0478] From Figure 12 and Figure 13B When the user starts the small cleaning mode from standby state (Ⅰ), for example, if the user... Figure 12 When the control lever 34 is rotated 90 degrees inward, it is in the position shown. Figure 12 In the initial position (standby state) shown, each of the first swing lever 48 and the second swing lever 50 swings, and each of the first ball chain 52 and the second ball chain 56 is lifted.

[0479] Thus, the working shaft 54 ​​and valve body 36 of the drain valve device 1 are lifted and move upward in a straight line via the first ball chain 52, thereby the float 572 is also lifted integrally via the working shaft 54 ​​(see reference). Figure 13B State (II)).

[0480] Furthermore, the switching valve 558 is lifted via the second ball chain 56, and the outlet 578 of the storage section 574 of the float 572 is opened by the switching valve 558.

[0481] Furthermore, the outlet 578 of the storage section 574 of the float 572 is kept closed by the switching valve 558 until the end of the small cleaning mode (see reference). Figure 13B State (II) to (IV)).

[0482] In addition, such as Figure 13B As shown in state (II), the float 572 and valve body 36 are in the highest position, and the drain outlet 18 of the water storage tank 12 is opened by the rising valve body 36, and the washing water begins to be discharged from the water storage tank 12 to the drain outlet 18.

[0483] After that, as Figure 13B As shown in state (Ⅲ), if the water level W1 in the water storage tank 12 drops to near the upper end of the water storage cylinder 62, and then further drops to a water level lower than the upper end of the water storage cylinder 62, the water pressure generated by the water level W2 in the water storage cylinder 62 is greater than the water pressure generated by the water level W1 in the water storage tank 12. Therefore, the washing water in the water storage cylinder 62 flows out from the outlet hole 68.

[0484] At this time, the storage section 574 of the float 572 containing the washing water maintains the state in which its outlet 578 is closed by the switching valve 558.

[0485] Therefore, the weight of the storage section 574 (and the amount of washing water stored in the storage section 574) in the small washing mode is greater than the weight of the storage section 574 (and the amount of washing water stored in the storage section 74) in the large washing mode.

[0486] Therefore, in the small cleaning mode, since the storage part 574 of the float 572 acts as a water hammer, the buoyancy acting on the float 572 in the small cleaning mode is less than the buoyancy in the large cleaning mode.

[0487] Therefore, the descent time T2 of float 572 in the small cleaning mode is shorter than the descent time T1 of float 572 in the large cleaning mode (T2 < T1).

[0488] In addition, the water level W2 in the water tank 62 and the balance position of the float 572 relative to the water tank 62 during the small cleaning mode are also lower than the balance position during the large cleaning mode.

[0489] Then, as Figure 13B As shown in state (Ⅳ), if the valve body 36 contacts the valve seat 66, the drain outlet 18 closes, stopping the discharge of washing water from the water storage tank 12 to the drain outlet 18.

[0490] Thus, the supply of washing water from the washing water tank device 502 to the toilet body 8 in the small washing mode ends.

[0491] at this time, Figure 13B In the small wash mode of state (VI), the lowest water level DWL2 (the so-called "static water line" or drain stop water level) in the water tank 12 is located at a level higher than that in the small wash mode. Figure 13AThe water level in the water tank 12 during the large wash mode in state (VI) is above the lowest water level DWL1.

[0492] That is, the amount of washing water discharged from the water tank 12 to the drain outlet 18 in the small washing mode is lower than the amount of washing water discharged from the water tank 12 to the drain outlet 18 in the large washing mode by the amount corresponding to the lower water level DWL2 in the small washing mode being higher than the lower water level DWL1 in the large washing mode.

[0493] According to the sixth embodiment of the present invention described above, when the toilet 4 is started to be washed, firstly, by selecting either the large washing mode or the small washing mode, the working shaft 54 ​​of the drain valve device 500 is raised, thereby raising the valve body 36 (opening the valve), and the washing water in the water storage tank 12 is supplied from the drain outlet 18 to the toilet body 8 of the toilet 4.

[0494] Then, the water level W2 in the water tank 62 decreases according to the selected large or small washing mode, and as the water level W2 decreases, the float 572 inside the water tank 62 descends.

[0495] As a result, the working shaft 54 ​​of the drain valve device 500 descends, thereby causing the valve body 36 to descend (close the valve), and the washing water in the water storage tank 12 is supplied from the drain outlet 18 to the toilet body 8 of the water-washing toilet 4.

[0496] Then, the water level W2 in the water tank 62 decreases according to the selected large or small washing mode. Based on this water level W2, the supply of washing water to the toilet body 8 of the toilet 4 is stopped, and the washing of the toilet 4 ends.

[0497] At this time, since the buoyancy obtained by float 572 in the small cleaning mode is less than that obtained in the large cleaning mode, the descent time T2 of float 572 in the small cleaning mode is shorter than the descent time T1 of float 572 in the large cleaning mode (T2 < T1).

[0498] Therefore, the descent time of float 572 or the opening time of valve body 36 in the small cleaning mode can be shorter than the descent time of float 572 or the opening time of valve body 36 in the large cleaning mode.

[0499] As a result, by changing the buoyancy acting on the float 572 according to the selected large or small washing mode, the balance position of the water level W2 in the water tank 62 and the float 572 can be changed when the washing water in the water tank 62 flows out from the outlet 68, and the descent time T1 and T2 of the float 572 as the water level W2 in the water tank 62 decreases can be changed.

[0500] Therefore, even in the smaller wash mode, which uses less water than the larger wash mode, the flow rate of wash water per unit time (hereinafter referred to as "instantaneous flow rate") (L / min) that affects the wash performance can be maintained at a relatively high level. In addition, the closing sound generated when the drain outlet of the valve body 36 is closed can also be reduced.

[0501] Furthermore, according to the drain valve device 500 of this embodiment, since the float 572 has a storage section 574 for storing washing water in a portion thereof, the amount of washing water stored in the small washing mode is greater than the amount of washing water stored in the large washing mode by means of the storage section 574.

[0502] Therefore, the weight of the storage section 574 in the small cleaning mode is greater than that in the large cleaning mode. As a result, the buoyancy obtained by the float 572 in the small cleaning mode is less than that obtained in the large cleaning mode.

[0503] Therefore, the descent time T2 of float 572 in the small cleaning mode is shorter than the descent time T1 of float 572 in the large cleaning mode (T2 < T1).

[0504] Therefore, the descent time of float 572 or the opening time of valve body 36 in the small cleaning mode can be shorter than the descent time of float 572 or the opening time of valve body 36 in the large cleaning mode.

[0505] As a result, by changing the buoyancy acting on the float 572 according to the selected large or small washing mode, the balance position of the water level W2 in the water tank 62 and the float 572 can be changed according to the washing mode when the washing water in the water tank 62 flows out from the outlet 68 to the water tank 12, and the descent time T1 and T2 of the float 572 as the water level in the water tank 62 decreases can be changed.

[0506] Therefore, even in the smaller wash mode, which uses less water than the larger wash mode, the instantaneous flow rate (L / min) of the wash water, which affects the washing performance, can be maintained at a relatively high level. In addition, the closing sound generated when the valve body 36 closes the drain port 18 can also be reduced.

[0507] Furthermore, according to the drain valve device 500 of this embodiment, when the large cleaning mode is executed, the switching valve 558 can open the outlet 578 of the peripheral wall portion 576 of the storage portion 574 provided above the float 572.

[0508] As a result, the washing water in the storage section 574 flows out from the outlet 578, and the storage section 574 at the top of the float 572 does not store washing water, so the buoyancy of the float 572 can be set to be larger.

[0509] On the other hand, when the small cleaning mode is executed, the outlet 578 of the peripheral wall portion 576 of the storage section 574 is closed by the switching valve 558, so the cleaning water in the storage section 574 cannot flow out from the outlet 578, and the cleaning water is stored in the storage section 574 above the float 572. The storage section 574 itself functions as a water hammer.

[0510] Therefore, the buoyancy of float 572 in the small cleaning mode can be set to be smaller than that of float 572 in the large cleaning mode.

[0511] As a result, by changing the buoyancy acting on the float 572 according to the selected large or small cleaning mode, the descent time of the float 572 or the opening time of the valve body 36 can be reliably switched.

[0512] Furthermore, since the valve opening time of the valve body 36 is not affected by manufacturing errors of the flushing water tank device 502 or the flushing toilet 4 to which the drain valve device 500 is applicable, appropriate flushing can be performed even with the applicable flushing toilet 4.

[0513] Next, refer to Figure 14A and Figure 14B The drain valve device 600 of the seventh embodiment of the present invention will be described.

[0514] Among them, Figure 14A and Figure 14B In the drain valve device 600 of the seventh embodiment of the present invention shown, the same reference numerals are added to the parts that are the same as those in the drain valve devices 1, 100, 200, 300, 400 and 500 of the first to fifth embodiments of the present invention described above, and their descriptions are omitted.

[0515] First, such as Figure 14A and Figure 14B As shown, in the drain valve device 600 of the seventh embodiment of the present invention, the float 672 has a peripheral wall portion 676, which is provided at the lower part of the float 672 and surrounds a portion of the lower part of the float 672 in a manner capable of storing washing water. Furthermore, the float 672 has a communication port 678, which is formed in a portion of the peripheral wall portion 676 and allows communication between the inside and outside of the float 672. Further, the float 672 has a partition portion (a switching valve 658 for switching between large and small washes), which is configured to be able to be opened or closed by sliding relative to the communication port 678 in the vertical direction.

[0516] Furthermore, in the large cleaning mode, the switching valve 658 restricts the flow of cleaning water or air inside and outside the float 672 by closing the communication port 678 of the peripheral wall portion 676 of the float 672.

[0517] On the other hand, in the small washing mode, the switching valve 658 allows the washing water or air inside and outside the float 672 to communicate through the communication port 678 of the peripheral wall portion 676 of the float 672.

[0518] Next, as Figure 14A and Figure 14B As shown, the float 672 has: a top portion 680 that closes the upper region of the peripheral wall portion 676 of the float 672; and a lower opening 682 that is formed along the lower edge of the peripheral wall portion 676.

[0519] Thus, the float 672 is formed into a generally cylindrical shape with its lower part open, and the connecting port 678 is located at a height between the top part 680 and the lower opening 682.

[0520] The structures of the drain valve device 600 of this embodiment described above are different from the structures of the drain valve device 500 of the sixth embodiment of the present invention described above.

[0521] Next, through Figure 14A and Figure 14B The operation of the drain valve device 600 according to the seventh embodiment of the present invention will be described.

[0522] First of all, Figure 14A and Figure 14B In the standby state shown in state (Ⅰ), the switching valve 658 closes the connection port 678.

[0523] Then, from that Figure 14A When the standby state shown in state (Ⅰ) is activated and the deep cleaning mode is started, in Figure 14A In state (II), the working shaft 54 ​​and valve body 36 are lifted upward by the first ball chain 52.

[0524] On the other hand, the switching valve 658 was not lifted upwards by the second ball chain 56 to close the communication port 678 of the float 672 (see reference). Figure 14A State (II)).

[0525] It should be noted that the state in which the connection port 678 of float 672 is closed by switching valve 658 is from the following... Figure 14A State (III) is maintained until valve 36 is closed and the large cleaning mode ends. Figure 14A The state (VI).

[0526] Therefore, in Figure 14A In state (II), the float 672 and valve body 36 are in the highest position, and the drain outlet 18 of the water storage tank 12 is opened by the raised valve body 36. Furthermore, the washing water in the water storage tank 12 is discharged to the drain outlet 18.

[0527] After that, as Figure 14A As shown in state (Ⅲ), if the water level W1 in the water storage tank 12 drops to near the upper end of the water storage cylinder 62, and then further drops to a water level lower than the upper end of the water storage cylinder 62, the water pressure generated by the water level W2 in the water storage cylinder 62 is higher than the water pressure generated by the water level W1 in the water storage tank 12. Therefore, the washing water in the water storage cylinder 62 flows out from the outlet hole 68.

[0528] Then, as Figure 14A As shown in states (Ⅳ) and (Ⅴ), the water level W2 in the water storage cylinder 62 is higher than the water level W1 in the water storage tank 12, and the washing water in the water storage cylinder 62 continues to flow out from the outlet hole 68. Therefore, the water level W2 in the water storage cylinder 62 gradually decreases, and the float 672 also decreases in conjunction with the decrease in the water level W2.

[0529] Next, as Figure 14A As shown in state (VI), if the water level W1 in the water tank 12 outside the water storage cylinder 62 drops to a level lower than the upper end of the outlet hole 68 of the water storage cylinder 62, then the outside of the outlet hole 68 of the water storage cylinder 62 will open to the atmosphere.

[0530] As a result, the speed at which the washing water in the water storage tank 62 flows out of the outlet hole 68 increases, and the water level W2 in the water storage tank 62 drops further. Consequently, the float 672 also drops, and the working shaft 54 ​​and valve body 36 also drop as a whole.

[0531] Then, if the valve body 36 contacts the valve seat 66, the drain outlet 18 closes, stopping the discharge of washing water from the water storage tank 12 to the drain outlet 18.

[0532] Thus, the supply of washing water from the washing water tank device 502 to the toilet body 8 in the large washing mode ends.

[0533] On the other hand, from such Figure 14B When the standby state shown in state (Ⅰ) is activated and the small cleaning mode is started, in Figure 14B In state (II), the working shaft 54 ​​and valve body 36 are lifted upward by the first ball chain 52.

[0534] Furthermore, the switching valve 658 is lifted via the second ball chain 56, and slides upward from the switching valve 658 to open the communication port 678 of the float 672.

[0535] It should be noted that the state in which the connection port 678 of float 672 is open by switching valve 658 remains open until the end of the small washing mode (refer to...). Figure 14B State (II) to (IV)).

[0536] In addition, such as Figure 14BAs shown in state (II), the float 672 and valve body 36 are in the highest position, and the drain outlet 18 of the water storage tank 12 is opened by the rising valve body 36, and the washing water begins to be discharged from the water storage tank 12 to the drain outlet 18.

[0537] After that, as Figure 14B As shown in state (Ⅲ), if the water level W1 in the water tank 12 drops to near the upper end of the water cylinder 62, and then further drops to a water level lower than the upper end of the water cylinder 62, the water pressure generated by the water level W2 in the water cylinder 62 is higher than the water pressure generated by the water level W1 in the water tank 12 outside the water cylinder 62. Therefore, the washing water in the water cylinder 62 flows out from the outlet hole 68.

[0538] In this configuration, float 672 maintains the state in which the communication port 678 is open by switching valve 658.

[0539] As a result, a portion of the air A inside the float 672 is discharged from the communication port 678 of the peripheral wall portion 676 to the outside of the float 672, and inside the float 672, a portion of the washing water on the outside of the float 672 flows into the lower region inside the float 672 in an amount corresponding to the volume of the discharged air.

[0540] Therefore, in the small cleaning mode, the volume Q602 occupied by the air in the float 672 is smaller than the volume Q601 occupied by the air in the float 172 in the large cleaning mode (Q602 < Q601).

[0541] Therefore, the buoyancy of float 672 is less in the small cleaning mode than in the large cleaning mode.

[0542] Therefore, the descent time T2 of float 672 in the small cleaning mode is shorter than the descent time T1 of float 672 in the large cleaning mode (T2 < T1).

[0543] In addition, the water level W2 in the water tank 62 and the balance position of the float 672 are lower in the small cleaning mode than in the large cleaning mode.

[0544] Then, as Figure 14B As shown in state (Ⅳ), if the valve body 36 contacts the valve seat 66, the drain outlet 18 closes, stopping the discharge of washing water from the water storage tank 12 to the drain outlet 18.

[0545] Thus, the supply of washing water from the washing water tank device 502 to the toilet body 8 in the small washing mode ends.

[0546] at this time, Figure 14B In state (Ⅳ) during the small wash mode, the lowest water level DWL2 (the so-called "static water line" or drain stop water level) in the water tank 12 is located at a level higher than that in the small wash mode. Figure 14AThe water level in the water tank 12 during the large wash mode in state (VI) is above the lowest water level DWL1.

[0547] That is, the amount of washing water discharged from the water tank 12 to the drain outlet 18 in the small washing mode is lower than the amount of washing water discharged from the water tank 12 to the drain outlet 18 in the large washing mode by the amount corresponding to the lower water level DWL2 in the small washing mode being higher than the lower water level DWL1 in the large washing mode.

[0548] According to the seventh embodiment of the present invention described above, the drain valve device 600, such as Figure 14A As shown, when the large cleaning mode is executed, the switching valve 658 for switching between large and small cleaning modes closes the communication port 678 of the peripheral wall portion 676 located at the lower part of the float 672.

[0549] As a result, the communication between the washing water or air inside and outside the float 672 is restricted. Therefore, the buoyancy of the float 672 can be set to be larger by means of the air A enclosed inside the float 672.

[0550] On the other hand, such as Figure 14B As shown, when the small washing mode is executed, the communication port 678 of the peripheral wall 676 is opened by the switching valve 658, so that the washing water or air inside and outside the float 672 can be connected.

[0551] Therefore, in the small cleaning mode, a portion of the air A inside the float 672 is discharged from the communication port 678 of the peripheral wall portion 676 to the outside of the float 672, and a portion of the cleaning water on the outside of the float 672 can flow into the lower region inside the float 672 in an amount corresponding to the volume of the discharged air.

[0552] Therefore, in the small cleaning mode, the volume Q602 occupied by the air inside the float 672 is smaller than the volume Q601 occupied by the air inside the float 672 in the large cleaning mode (Q602 < Q601).

[0553] Therefore, the buoyancy of float 672 in the small cleaning mode can be set to be smaller than that in the large cleaning mode.

[0554] As a result, by changing the buoyancy acting on the float 672 according to the selected large or small cleaning mode, the descent time of the float 672 or the opening time of the valve body 36 can be reliably switched.

[0555] Furthermore, since the valve opening time of the valve body 36 is not affected by manufacturing errors of the flushing water tank device 502 or the flushing toilet 4 to which the drain valve device 600 of this embodiment is applicable, appropriate flushing can be performed even for the applicable flushing toilet 4.

[0556] Furthermore, according to the drain valve device 600 of this embodiment, such as Figure 14A As shown, when the switching valve 658 for switching between large and small washes is closed in the large wash mode, the connecting port 678 of the peripheral wall portion 676 of the float 672 is closed. By filling the float 672 with air A, the external wash water of the float 672 is prevented from flowing into the float 672 from the lower opening 682.

[0557] On the other hand, such as Figure 14B As shown, when the switching valve 658 is in the small washing mode and the communication port 678 of the peripheral wall portion 676 of the float 672 is open, by allowing a portion of the air inside the float 672 to be discharged from the communication port 678, the washing water outside the float 672 can flow from the lower opening 682 and / or the communication port 678 to the vicinity of the height of the communication port 678 inside the float 672.

[0558] Therefore, the buoyancy acting on float 672 in the small cleaning mode is smaller than that acting on float 672 in the large cleaning mode.

[0559] As a result, by changing the buoyancy acting on the float 672 according to the selected large or small cleaning mode, the descent time of the float 672 or the opening time of the valve body 36 can be reliably switched.

[0560] Furthermore, since the valve opening time of the valve body 36 is not affected by manufacturing errors of the flushing water tank device 502 or the flushing toilet 4 to which the drain valve device 600 of this embodiment is applicable, appropriate flushing can be performed even for the applicable flushing toilet 4.

[0561] Next, refer to Figure 15A and Figure 15B The drain valve device 700 of the eighth embodiment of the present invention will be described.

[0562] Among them, Figure 15A and Figure 15B In the drain valve device 700 of the eighth embodiment of the present invention shown, the same reference numerals are added to the parts that are the same as those in the drain valve devices 1, 100, 200, 300, 400, 500 and 600 of the first to seventh embodiments of the present invention described above, and their descriptions are omitted.

[0563] like Figure 15A and Figure 15B As shown, in the drain valve device 700 of the eighth embodiment of the present invention, it is common to the drain valve device 500 of the sixth embodiment of the present invention in that it has the same float as the float 572 which has the same storage portion 574 and the outlet 578 of the peripheral wall portion 576 as the drain valve device 500 of the sixth embodiment of the present invention described above.

[0564] However, the drain valve device 700 of this embodiment does not have a water storage tank 62 equivalent to the drain valve device 500 of the sixth embodiment of the present invention described above, which makes it different from the drain valve device 500 of the sixth embodiment.

[0565] Next, through Figure 15A The deep cleaning mode performed by the drain valve device 700 of the eighth embodiment of the present invention will be described.

[0566] If from Figure 15A When the standby state (Ⅰ) starts the deep cleaning mode, only the first ball chain 52 is lifted.

[0567] As a result, the working shaft 54 ​​and valve body 36 of the drain valve device 700 are lifted and move upward in a straight line via the first ball chain 52, thereby the float 72 is also lifted integrally via the working shaft 54 ​​(see reference). Figure 15A State (II)).

[0568] At this time, since the second ball chain 56 is not lifted, the switching valve 58 is not lifted by the second ball chain 56 and is in a state where it is rotated to open the outlet 578 of the storage section 574 of the float 572 (see reference). Figure 15A State (II)).

[0569] It should be noted that the state of the outlet 578 of the storage section 574 of the switching valve 558 opening the float 572 remains thereafter until the end of the major cleaning mode (see reference). Figure 15A (States (II) to (V)).

[0570] Therefore, in Figure 15A In state (II), the float 572 and valve body 36 are in the highest position, the drain outlet 18 of the water storage tank 12 is open by the raised valve body 36, and the washing water in the water storage tank 12 is discharged from the drain outlet 18 to the water guide 8a of the toilet body 8.

[0571] After that, as Figure 15A As shown in states (Ⅲ) and (Ⅳ), if the water level W1 in the water storage tank 12 drops, the float 572 will drop in conjunction with the drop in water level W1.

[0572] At this time, in the storage section 574 of the float 572, the outlet 578 is open by the switching valve 558 and no washing water is stored, so it cannot function as a water hammer.

[0573] Then, if the working shaft 54 ​​and valve body 36 descend as a unit with the float 572, and as Figure 15AAs shown in state (V), when valve body 36 contacts valve seat 66, drain outlet 18 closes, stopping the discharge of washing water from water storage tank 12 to drain outlet 18.

[0574] Thus, the supply of washing water from the washing water tank device 502 to the toilet body 8 in the large washing mode ends.

[0575] Next, through Figure 15B The small washing mode performed by the drain valve device 700 of the eighth embodiment of the present invention will be described.

[0576] If from Figure 15B When the standby state (Ⅰ) starts the small cleaning mode, for example, each of the first ball chain 52 and the second ball chain 56 is lifted.

[0577] As a result, the working shaft 54 ​​and valve body 36 of the drain valve device 700 are lifted and move upward in a straight line via the first ball chain 52, thereby the float 572 is also lifted integrally via the working shaft 54 ​​(see reference). Figure 15B State (II)).

[0578] In addition, the switching valve 558 is lifted via the second ball chain 56, and the outlet 578 of the storage section 574 of the float 572 is closed by the switching valve 558.

[0579] It should be noted that the outlet 578 of the storage section 574 of the float 572 is closed by the switching valve 558 and remains closed until the end of the small cleaning mode (see reference). Figure 15B (States (II) to (V)).

[0580] In addition, such as Figure 15B As shown in state (II), the float 572 and valve body 36 are in the highest position, and the drain outlet 18 of the water storage tank 12 is opened by the rising valve body 36, and the washing water begins to be discharged from the water storage tank 12 to the drain outlet 18.

[0581] After that, as Figure 15B As shown in state (Ⅲ), if the water level W1 in the water storage tank 12 drops to a level lower than the upper end of the float 572, the float 572 will drop in conjunction with the drop in the water level W1 in the water storage tank 12.

[0582] At this time, the storage section 574 of the float 572 containing the washing water maintains the state in which its outlet 578 is closed by the switching valve 558.

[0583] Therefore, the weight of the storage section 574 (and the amount of washing water stored in the storage section 574) in the small washing mode is greater than the weight of the storage section 574 (and the amount of washing water stored in the storage section 574) in the large washing mode.

[0584] Therefore, in the small cleaning mode, the storage section 574 of the float 572 acts as a water hammer, and thus the buoyancy acting on the float 572 in the small cleaning mode is smaller than the buoyancy in the large cleaning mode.

[0585] Therefore, the descent time T2 of float 572 in the small cleaning mode is shorter than the descent time T1 of float 572 in the large cleaning mode (T2 < T1).

[0586] In addition, the water level W1 in the water tank 12 during the small cleaning mode is lower than the balance position of the float 572 during the large cleaning mode.

[0587] Then, if the working shaft 54 ​​and valve body 36 descend as a whole with the float 572 and... Figure 15B When the valve body 36 is in contact with the valve seat 66 as shown in state (V), the drain outlet 18 closes, stopping the discharge of washing water from the water storage tank 12 to the drain outlet 18.

[0588] Thus, the supply of washing water from the washing water tank device 502 to the toilet body 8 in the small washing mode ends.

[0589] at this time, Figure 15B In the small wash mode of state (V), the lowest water level DWL2 (the so-called "static water line", the drain stop water level) in the water tank 12 is located at a level higher than that in the small wash mode. Figure 15A The water level in the water tank 12 during the large wash mode in state (V) is above the lowest water level DWL1.

[0590] That is, the amount of washing water discharged from the water tank 12 to the drain outlet 18 in the small washing mode is lower than the amount of washing water discharged from the water tank 12 to the drain outlet 18 in the large washing mode by the amount corresponding to the lower water level DWL2 in the small washing mode being higher than the lower water level DWL1 in the large washing mode.

[0591] According to the drain valve device 700 of the eighth embodiment of the present invention described above, when the toilet 4 is started to be washed, firstly, based on the selection of either the large washing mode or the small washing mode, the working shaft 54 ​​of the drain valve device 700 is raised, thereby raising the valve body 36 (opening the valve), and the washing water in the water storage tank 12 is supplied from the drain outlet 18 to the toilet body 8 of the toilet 4.

[0592] Then, if the water level W1 in the water storage tank 12 decreases according to the selected large or small washing mode, the float 572 will descend as the water level W1 decreases.

[0593] As a result, the working shaft 54 ​​of the drain valve device 700 descends, thereby causing the valve body 36 to descend (close the valve), and the washing water in the water storage tank 12 is supplied from the drain outlet 18 to the toilet body 8 of the water-washing toilet 4.

[0594] At this time, since the buoyancy obtained by float 572 in the small washing mode is smaller than that obtained in the large washing mode, the descent time T2 of float 572 in the small washing mode can be shorter than the descent time T1 of float 572 in the large washing mode (T2 < T1).

[0595] Therefore, the descent time of float 572 or the opening time of valve body 36 in the small cleaning mode can be shorter than the descent time of float 572 or the opening time of valve body 36 in the large cleaning mode.

[0596] As a result, by changing the buoyancy acting on the float 572 according to the selected large or small washing mode, the equilibrium position of the water level W1 in the water tank 12 and the float 572 can be changed, and the descent time T1 and T2 of the float 572 as the water level W1 in the water tank 12 decreases can be changed.

[0597] Therefore, even in the smaller wash mode, which uses less water than the larger wash mode, the flow rate of wash water per unit time (hereinafter referred to as "instantaneous flow rate") (L / min) that affects the wash performance can be maintained at a relatively high level. In addition, the closing sound generated when the drain outlet of the valve body 36 is closed can also be reduced.

[0598] Next, refer to Figure 16A and Figure 16B The drain valve device 800 of the ninth embodiment of the present invention will be described.

[0599] Among them, Figure 16A and Figure 16B In the drain valve device 800 of the ninth embodiment of the present invention shown, the same reference numerals are added to the parts that are the same as those in the drain valve devices 1, 100, 200, 300, 400, 500, 600 and 700 of the first to eighth embodiments of the present invention described above, and their descriptions are omitted.

[0600] like Figure 16A and Figure 16B As shown, the drain valve device 800 of the ninth embodiment of the present invention is common to the drain valve device 600 of the seventh embodiment of the present invention in that it has the same float as the float 672 with the communication port 678 of the drain valve device 600 of the seventh embodiment of the present invention described above.

[0601] However, the drain valve device 800 of this embodiment has a different structure from the drain valve device 600 of the seventh embodiment in that it does not have a water storage tank 62 that is equivalent to the drain valve device 600 of the seventh embodiment of the present invention described above.

[0602] Next, through Figure 16A The large-scale cleaning mode performed by the drain valve device 800 of the ninth embodiment of the present invention will be described.

[0603] If from Figure 16A When the standby state (Ⅰ) starts the deep cleaning mode, only the first ball chain 52 is lifted.

[0604] As a result, the working shaft 54 ​​and valve body 36 of the drain valve device 800 are lifted and move upward in a straight line via the first ball chain 52, thereby the float 672 is also lifted integrally via the working shaft 54 ​​(see reference). Figure 16A State (II)).

[0605] At this time, since the second ball chain 56 is not lifted, the switching valve 658 is not lifted by the second ball chain 56 and thus closes the connection port 678 of the float 672. Figure 16A (Reference to State (II)).

[0606] It should be noted that the state in which the switching valve 658 closes the connection port 678 of the float 672 remains unchanged until the end of the major cleaning mode (refer to...). Figure 16A (States (II) to (V)).

[0607] Therefore, in Figure 16A In state (II), the float 672 and valve body 36 are in the highest position, the drain outlet 18 of the water storage tank 12 is open by the raised valve body 36, and the washing water in the water storage tank 12 is discharged from the drain outlet 18 to the water guide 8a of the toilet body 8.

[0608] After that, as Figure 16A As shown in states (Ⅲ) and (Ⅳ), if the water level W1 in the water storage tank 12 drops, the float 672 will drop in conjunction with the drop in water level W1.

[0609] At this time, since the connection port 678 of the float 672 is closed by the switching valve 658, the pressure inside the float 672 is higher than the water pressure in the water storage tank 12 outside the float 672. Therefore, the washing water outside the float 672 cannot flow into the float 672 from the connection port 678 or the lower opening 182.

[0610] Then, the working shaft 54 ​​and valve body 36 descend as a single unit with the float 672, as... Figure 16A As shown in state (V), if the valve body 36 is in contact with the valve seat 66, the drain outlet 18 will close, stopping the discharge of washing water from the water storage tank 12 to the drain outlet 18.

[0611] Thus, the supply of washing water from the washing water tank device 502 to the toilet body 8 in the large washing mode ends.

[0612] On the other hand, from Figure 16B When the standby state shown in state (Ⅰ) is activated and the small cleaning mode is started, in Figure 16B In state (II), the working shaft 54 ​​and valve body 36 are lifted upward by the first ball chain 52.

[0613] Furthermore, the switching valve 158 is lifted via the second ball chain 56, thereby causing the switching valve 158 to slide upward and open the communication port 678 of the float 672.

[0614] It should be noted that the state in which the connection port 678 of float 672 is open by switching valve 658 remains open until the end of the small washing mode (refer to...). Figure 16B (States (II) to (V)).

[0615] Furthermore, such as Figure 16B As shown in state (II), the float 672 and valve body 36 are in the highest position, and the drain outlet 18 of the water storage tank 12 is opened by the rising valve body 36, and the washing water begins to be discharged from the water storage tank 12 to the drain outlet 18.

[0616] After that, as Figure 16B As shown in state (Ⅲ), if the water level W1 in the water storage tank 12 drops to a level lower than the upper end of the float 672, the float 672 will drop in conjunction with the drop in the water level W1 in the water storage tank 12.

[0617] Specifically, for float 672, the communication port 678 is kept open by switching valve 658.

[0618] As a result, a portion of the air A inside the float 672 is discharged from the communication port 678 of the peripheral wall portion 676 to the outside of the float 672, and a portion of the washing water on the outside of the float 672 flows into the lower region inside the float 172 in an amount corresponding to the volume of the discharged air or washing water.

[0619] Therefore, in the small cleaning mode, the volume Q602 occupied by the air in the float 672 is smaller than the volume Q601 occupied by the air in the float 172 in the large cleaning mode (Q602 < Q601).

[0620] Therefore, the buoyancy of float 672 is less in the small cleaning mode than in the large cleaning mode.

[0621] Therefore, the descent time T2 of float 672 in the small cleaning mode is shorter than the descent time T1 of float 672 in the large cleaning mode (T2 < T1).

[0622] In addition, the water level W1 in the water tank 12 during the small cleaning mode is lower than the balance position of the float 672 compared to the cleaning mode.

[0623] Then, as Figure 16B As shown in state (V), if the valve body 36 is in contact with the valve seat 66, the drain outlet 18 will close, stopping the discharge of washing water from the water storage tank 12 to the drain outlet 18.

[0624] Thus, the supply of washing water from the washing water tank device 502 to the toilet body 8 in the small washing mode ends.

[0625] at this time, Figure 16B In the small wash mode (V), the lowest water level DWL2 (the so-called "static water line" or drain stop water level) in the water tank 12 is located at a position lower than... Figure 16A The water level in the water tank 12 during the large wash mode (V) is above the lowest water level DWL1.

[0626] That is, the amount of washing water discharged from the water tank 12 to the drain outlet 18 in the small washing mode is lower than the amount of washing water discharged from the water tank 12 to the drain outlet 18 in the large washing mode by the amount corresponding to the lower water level DWL2 in the small washing mode being higher than the lower water level DWL1 in the large washing mode.

[0627] According to the above-described ninth embodiment of the present invention, when the toilet 4 is started to be washed, firstly, based on the selection of either the large washing mode or the small washing mode, the working shaft 54 ​​of the drain valve device 800 is raised, thereby raising the valve body 36 (opening the valve), and the washing water in the water storage tank 12 is supplied from the drain outlet 18 to the toilet body 8 of the toilet 4.

[0628] Then, if the water level W1 in the water storage tank 12 decreases according to the selected large or small washing mode, the float 672 will descend as the water level W1 decreases.

[0629] As a result, the working shaft 54 ​​of the drain valve device 800 descends, thereby causing the valve body 36 to descend (close the valve), and the washing water in the water storage tank 12 is supplied from the drain outlet 18 to the toilet body 8 of the water-washing toilet 4.

[0630] At this time, since the buoyancy obtained by float 672 in the small washing mode is smaller than that obtained in the large washing mode, the descent time T2 of float 672 in the small washing mode is shorter than the descent time T1 of float 672 in the large washing mode (T2 < T1).

[0631] Therefore, the descent time of float 672 or the opening time of valve body 36 in the small cleaning mode can be shorter than the descent time of float 672 or the opening time of valve body 36 in the large cleaning mode.

[0632] As a result, by changing the buoyancy acting on the float 672 according to the selected large or small washing mode, the equilibrium position of the water level W1 in the water tank 12 and the float 672 can be changed, and the descent time T1 and T2 of the float 672 as the water level W1 in the water tank 12 decreases can be changed.

[0633] Therefore, even in the smaller wash mode, which uses less water than the larger wash mode, the flow rate of wash water per unit time (hereinafter referred to as "instantaneous flow rate") (L / min) that affects the wash performance can be maintained at a relatively high level. In addition, the closing sound generated when the drain outlet of the valve body 36 is closed can also be reduced.

[0634] Symbol explanation:

[0635] 1. Drain valve device according to the first embodiment of the present invention; 2. Washing water tank device.

[0636] 4. Water-washable toilet

[0637] 6 basins

[0638] 8 toilet body

[0639] 8a water guide channel

[0640] 10 External water tanks; 12 Water storage tanks (washing water tanks)

[0641] 14. Cover

[0642] 16 Insulation Body

[0643] 18 drain outlets

[0644] 20 Water Supply Device

[0645] 22 water supply pipe

[0646] 24 valve unit

[0647] 26 Water supply float

[0648] 28 water pipes

[0649] 30 strokes

[0650] 32 Operating Devices

[0651] 34 control levers

[0652] 36 valve body

[0653] 38 Lifting Work Section

[0654] 40 outer rotating axis

[0655] 42 Inner Rotation Axis

[0656] 44 Rotating spindle section

[0657] 46 cylindrical rotating parts

[0658] 48 First swing arm

[0659] 50 Second Swing Rod

[0660] 52 First Ball Chain

[0661] 54 working axes

[0662] 56 Second Ball Chain

[0663] 58. Switching valve (divider) for switching between different sizes of washing equipment.

[0664] 60 Drainage outlet forming section

[0665] 62 water storage tank

[0666] 62a sidewall portion

[0667] 64 overflow tube

[0668] 66 valve seat

[0669] 68 First outlet hole

[0670] 70 Second Outlet Hole

[0671] 72 floats

[0672] 100 Drain valve device according to the second embodiment of the present invention

[0673] Switching valve (divider) for switching between sizes 158 and 24.

[0674] 162 Water Storage Tank

[0675] 162a Sidewall portion

[0676] 168 Outlet Hole

[0677] 170 connecting hole

[0678] 200 Drain valve device according to the third embodiment of the present invention

[0679] Switching valve (divider) for switching between sizes 258 and cleanroom.

[0680] 262 Water Storage Tank

[0681] 262a Sidewall portion

[0682] 268 First outlet orifice

[0683] 270 Second outlet hole

[0684] 300 Drain valve device according to the fourth embodiment of the present invention

[0685] 358 Size Wash Switching Valve (Divider)

[0686] 362 Water Storage Tank

[0687] 362a Sidewall portion

[0688] 368 First outlet orifice

[0689] 370 Second outlet hole

[0690] 400 Drain valve device according to the fifth embodiment of the present invention

[0691] 458 Size Wash Switching Valve (Divider)

[0692] The upper end of the 458a switching valve

[0693] 462 water storage tank

[0694] 462a sidewall portion

[0695] 468 Water Storage Tank Main Body

[0696] 468a Side wall of the main body of the water storage tank

[0697] 468b Upper edge of the main body of the water storage tank

[0698] 470 small water tank

[0699] The upper edge of the 470a small water tank

[0700] 472 outflow hole

[0701] 474 floats

[0702] 476 Connecting opening

[0703] 478 stop section

[0704] 478a Upper end of the locking part

[0705] 480 valve body

[0706] 482 Water Hammer Section

[0707] 482a Open End

[0708] 484 auxiliary outflow hole

[0709] 500 Drain valve device according to the sixth embodiment of the present invention

[0710] 558 Size Wash Switching Valve (Divider)

[0711] 560a overflow tube

[0712] 572 floats

[0713] 574 Storage Department

[0714] 576 circumferential wall

[0715] 578 Outlet

[0716] 600 Drain valve device according to the seventh embodiment of the present invention

[0717] 658 Size Wash Switching Valve (Divider)

[0718] 672 floats

[0719] 676 circumferential wall

[0720] 678 Connecting Port

[0721] 680 top faces

[0722] 682 lower opening

[0723] 700 Drain valve device according to the eighth embodiment of the present invention 800 Drain valve device according to the ninth embodiment of the present invention

[0724] Air inside float A

[0725] A1 Rotation Center Axis

[0726] A2 Rotation Center Axis

[0727] The direction of the opening of the switching valve used for C1 large and small washing switching.

[0728] The switching valve for C2 size washing switches closes the direction of the connecting opening.

[0729] Minimum water level in the water tank during DWL1 deep wash mode

[0730] The minimum water level in the water tank during the DWL2's mini wash mode.

[0731] Initial position of the switching valve used for P0 size washing switching

[0732] Q1. In the heavy cleaning mode, when the valve is opened, the amount of cleaning water in the water tank that flows out from the first outlet hole to the water tank per unit time is [amount missing].

[0733] Q2. In the small washing mode, when the valve is opened, the amount of washing water in the water tank flowing out from the first and second outlet holes to the water tank per unit time is...

[0734] Q401 During the heavy cleaning mode, when the valve body is opened, the total outflow and drainage volume of the cleaning water in the water storage tank from the outlet hole to the water storage tank (first total outflow) is calculated.

[0735] Q402 In the small washing mode, when the valve body is opened, the total outflow and drainage volume of the washing water in the water tank from the outlet hole to the water tank (second total outflow volume) is calculated.

[0736] Q601 The volume occupied by air inside the float during the deep cleaning mode

[0737] The volume occupied by air inside the float in the Q602 gentle cleaning mode.

[0738] The total opening area of ​​the water tank outlet in the S1 large wash mode.

[0739] The total opening area of ​​the water tank outlet in the S2 small wash mode.

[0740] The water level in the reservoir and the descent time of the float in the T1 deep clean mode

[0741] The water level in the reservoir and the descent time of the float in the T2 mini-wash mode.

[0742] The water level in the reservoir and the descent speed of the float in the v1 deep clean mode.

[0743] The water level in the reservoir and the descent speed of the float in the v2 mini-wash mode.

[0744] Water level in W1 water tank

[0745] Water level in W2 storage tank

[0746] Water level in the main body of W2a water storage tank

[0747] Water level in the W2b small water tank.

Claims

1. A drain valve device, which is a drain valve device installed in a flushing water tank that supplies flushing water to a toilet, comprising: The valve body opens or closes the drain outlet located at the bottom of the aforementioned washing water tank; The working shaft has the valve body at its lower end and moves up and down to open or close the valve body. A water storage cylinder, through which the aforementioned working shaft is inserted vertically and stores a portion of the washing water in the aforementioned washing water tank, and has an outlet hole for the washing water inside to flow outwards; and A float, disposed within the aforementioned water storage cylinder, allows the buoyancy generated by the washing water within the cylinder to act on the aforementioned working shaft. The aforementioned working shaft and valve body are configured such that if the float descends as the water level in the water storage tank decreases, the working shaft and valve body descend in conjunction with the float, and the valve body closes the drain outlet. During the period from opening to closing of the valve body, the drain valve device can selectively execute either a large wash mode in which the wash water in the wash water tank is supplied from the drain outlet to the toilet with a first wash water volume, or a small wash mode in which the wash water in the toilet is supplied with a second wash water volume less than the first wash water volume. In the aforementioned large-scale washing mode, the first total outflow of washing water from the aforementioned outlet hole to the aforementioned washing water tank in the aforementioned water storage tank is greater than the second total outflow of washing water from the aforementioned outlet hole to the aforementioned washing water tank in the aforementioned small-scale washing mode. The aforementioned water storage tank or float is configured to change the descent speed of the float as the water level in the aforementioned water storage tank decreases, depending on the selected large washing mode or small washing mode.

2. The drain valve device according to claim 1, wherein, The water storage tank is configured such that, when the valve body is opened, the total opening area of ​​the outlet holes in the small washing mode is larger than the total opening area of ​​the outlet holes in the large washing mode. In the small washing mode described above, the amount of washing water flowing from the water storage tank to the washing water tank through the outlet hole per unit time is greater than that in the large washing mode described above.

3. The drain valve device according to claim 1, wherein, The aforementioned water storage cylinder includes: a first outlet hole, which allows the washing water in the storage cylinder to flow out to the washing water tank in the aforementioned large washing mode; and a second outlet hole, which allows the washing water in the storage cylinder to flow out to the washing water tank in the aforementioned small washing mode. When the valve body is opened, the total opening area of ​​the first outlet hole and the second outlet hole are the same, and the second outlet hole is positioned above the first outlet hole. In the aforementioned small washing mode, the second amount of washing water flowing from the second outlet hole into the washing water tank per unit time is set to be greater than the first amount of washing water flowing from the first outlet hole into the washing water tank per unit time in the aforementioned large washing mode.

4. The drain valve device according to claim 2, wherein, The aforementioned outlet orifice includes a first outlet orifice and a second outlet orifice. The water storage tank is configured such that, in the large washing mode, the washing water in the water storage tank flows out from the first outlet hole to the washing water tank, and in the small washing mode, the washing water in the water storage tank flows out from both the first outlet hole and the second outlet hole to the washing water tank.

5. The drain valve device according to claim 4, wherein, The second outlet hole is positioned above the first outlet hole.

6. The drain valve device according to claim 2, wherein, The water storage cylinder has a partition that closes a portion of the outlet hole, such that the total opening area of ​​the outlet hole in the large washing mode is smaller than the total opening area of ​​the outlet hole in the small washing mode.

7. The drain valve device according to claim 6, wherein, The aforementioned partition has a connecting hole that allows the water storage cylinder to connect with the washing water tank while the outlet hole is closed, and the cross-sectional area of ​​the connecting hole is smaller than the cross-sectional area of ​​the outlet hole. The aforementioned partition is configured such that, in the large washing mode, with the outlet hole closed, the washing water in the water storage tank flows out from the connecting hole into the washing water tank, and in the small washing mode, the outlet hole is opened, allowing the washing water in the water storage tank to flow out from the entire outlet hole into the washing water tank.

8. The drain valve device according to claim 1, wherein, The aforementioned water storage cylinder comprises: a main body having the aforementioned outlet hole; and a small water tank communicatively connected to the main body of the water storage cylinder. The small water tank includes: a communication opening that connects to the main body of the aforementioned water storage cylinder; and a partition that allows the communication opening to be opened or closed. The aforementioned partition is configured such that, in the large washing mode, the water tank body is connected to the small water tank by opening the aforementioned connecting opening, and in the small washing mode, the water tank body is separated from the small water tank by closing the aforementioned connecting opening.

9. The drain valve device according to claim 8, wherein, The aforementioned partition is configured to rotate relative to the aforementioned connecting opening, rotating in the direction of opening the connecting opening in the aforementioned large washing mode, and rotating in the direction of closing the connecting opening in the aforementioned small washing mode.

10. The drain valve device according to claim 9, wherein, The aforementioned connecting opening has a locking portion provided at its edge and rotatably supports the aforementioned partition. In the aforementioned small washing mode, the aforementioned partition rotates in the direction of closing the aforementioned connecting opening and comes into contact with the aforementioned locking portion, thereby the locking portion restricts the rotation of the aforementioned partition.

11. The drain valve device according to claim 10, wherein, The aforementioned partition also includes a water hammer section for storing washing water, and the aforementioned small water tank also includes an auxiliary outlet hole formed on its bottom surface for allowing the washing water in the small water tank to flow out. When the aforementioned partition abuts against the aforementioned locking part, the aforementioned water hammer part can store washing water and the auxiliary outlet hole of the aforementioned small water tank is open. If the washing water in the aforementioned small water tank flows out from the auxiliary outlet hole, the aforementioned partition part rotates in the direction away from the aforementioned locking part and causes the washing water in the aforementioned water hammer part to flow out.

12. The drain valve device according to claim 11, wherein, The aforementioned partition is configured such that, In the initial position, it is in a state where it does not abut against the aforementioned locking part, the aforementioned connecting opening is open, and the aforementioned water hammer part does not contain washing water. During standby periods when no washing mode is being executed, and during the execution of the aforementioned large washing mode, by maintaining the aforementioned partition in the aforementioned initial position, the aforementioned auxiliary outlet of the aforementioned small water tank is closed, allowing washing water to be stored in the aforementioned small water tank. Furthermore, during the execution of the aforementioned small washing mode, after the aforementioned partition rotates from the aforementioned initial position and maintains the state of closing the aforementioned connecting opening by contacting the aforementioned locking part, if the washing water in the aforementioned small water tank flows out from the aforementioned auxiliary outlet hole, the aforementioned partition rotates towards the aforementioned initial position while allowing the washing water in the aforementioned water hammer part to flow out, and then returns to the aforementioned initial position.

13. The drain valve device according to claim 8, wherein, The upper edges of the main body of the aforementioned water storage cylinder and the upper edges of the aforementioned small water tank are coplanar. With the aforementioned partition closing the aforementioned connecting opening, the upper end of the aforementioned partition protrudes upwards further than the upper edge of the aforementioned connecting opening or the upper edge of the aforementioned small water tank.

14. The drain valve device according to claim 1, wherein, The float is configured such that the buoyancy obtained in the small cleaning mode is smaller than the buoyancy obtained in the large cleaning mode.

15. The drain valve device according to claim 14, wherein, The float has a storage section for storing washing water in a portion thereof, the storage section being configured such that the amount of washing water stored in the small washing mode is greater than the amount of washing water stored in the large washing mode.

16. The drain valve device according to claim 15, wherein, The aforementioned storage section includes: a peripheral wall portion disposed above the float, surrounding a portion of the upper part of the float to store washing water; and a partition portion configured to open or close an outlet formed in a portion of the peripheral wall portion. The aforementioned partition is configured such that, in the large cleaning mode, the washing water in the storage section can flow out from the outlet of the peripheral wall section by opening the outlet, and in the small cleaning mode, the storage section becomes a water hammer by maintaining the outlet of the peripheral wall section closed and storing washing water in the storage section.

17. The drain valve device according to claim 14, wherein, The aforementioned float comprises: a peripheral wall portion disposed at the lower part of the float and surrounding a portion of the lower part of the float to store washing water; a communication port formed in a portion of the peripheral wall portion to communicate between the inside and outside of the float; and a partition portion configured to allow the communication port to be opened or closed. The aforementioned partition is configured such that, in the large cleaning mode, the connection between the washing water or air inside and outside the float is restricted by closing the communication port of the peripheral wall portion, and in the small cleaning mode, the connection between the washing water or air inside and outside the float is enabled by opening the communication port of the peripheral wall portion.

18. The drain valve device according to claim 17, wherein, The aforementioned float, by having a top portion that closes the upper region of the aforementioned peripheral wall portion and a lower opening formed along the lower edge of the aforementioned peripheral wall portion, forms a generally cylindrical shape with an open lower part. The aforementioned connecting opening is located at a height between the aforementioned top surface and the aforementioned lower opening.

19. A washing water tank device, which is a washing water tank device having the drain valve device as described in claim 1.

20. A water-washing toilet, comprising the water tank device of claim 19.

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