JP5811342B2 - Drain valve device, wash water tank device equipped with this drain valve device, and flush toilet equipped with this wash water tank device - Google Patents

Drain valve device, wash water tank device equipped with this drain valve device, and flush toilet equipped with this wash water tank device Download PDF

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JP5811342B2
JP5811342B2 JP2011244460A JP2011244460A JP5811342B2 JP 5811342 B2 JP5811342 B2 JP 5811342B2 JP 2011244460 A JP2011244460 A JP 2011244460A JP 2011244460 A JP2011244460 A JP 2011244460A JP 5811342 B2 JP5811342 B2 JP 5811342B2
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water
control cylinder
water storage
drain valve
drain
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JP2013100668A (en
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秀樹 谷本
秀樹 谷本
弘毅 篠原
弘毅 篠原
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Toto Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Description

本発明は、排水弁装置、この排水弁装置を備えた洗浄水タンク装置、及び、この洗浄水タンク装置を備えた水洗大便器に係り、特に、便器を洗浄する洗浄水を貯える洗浄水タンクの排水弁装置、この排水弁装置を備えた洗浄水タンク装置、及び、この洗浄水タンク装置を備えた水洗大便器に関する。   The present invention relates to a drain valve device, a washing water tank device provided with the drain valve device, and a flush toilet equipped with the washing water tank device, and more particularly, a washing water tank for storing washing water for washing the toilet bowl. The present invention relates to a drain valve device, a flush water tank device including the drain valve device, and a flush toilet including the flush water tank device.

従来から、便器を洗浄する洗浄水を貯える洗浄水タンクの排水弁装置として、例えば、特許文献１に記載されているように、小さな流量で洗浄水を流出させる***が形成された貯水部と、この貯水部内の水位の低下に伴って下降するフロートとを備えた排水弁装置が知られている。
このような排水弁装置では、フロートと連結した水平軸部材が排水弁装置本体の突起と係合することにより排水弁の開弁状態が維持されている一方、フロートが下降し、このフロートと連結した水平軸部材と排水弁装置本体の突起との係合が解除されることにより、排水弁の閉弁動作が開始するようになっている。 Conventionally, as a drain valve device of a wash water tank for storing wash water for washing toilet bowls, for example, as described in Patent Document 1, a water storage part formed with a small hole through which wash water flows out at a small flow rate; There is known a drain valve device including a float that descends as the water level in the water storage section decreases.
In such a drain valve device, the horizontal shaft member connected to the float is engaged with the protrusion of the drain valve device main body, so that the drain valve is kept open, while the float is lowered and connected to the float. When the engagement between the horizontal shaft member and the projection of the drain valve device main body is released, the drain valve closing operation is started.

欧州特許第１６５０３６６号明細書European Patent No. 1650366

このような特許文献１に記載されている従来の排水弁装置においては、開弁状態の排水弁が閉弁動作を開始するまでに、貯水部内の水位が下降する速度が極めて遅い速度に設定されているため、洗浄水タンクから便器へ十分な量の洗浄水を供給できるようになっている。
しかしながら、貯水部内の水位が遅い速度で下降する程、その分フロートもゆっくり下降することになる。特に、貯水部の***の開口面積を極めて小さく設定した場合には、この***からより小さな流量で洗浄水を流出させる程、貯水部内の水位もフロートの自重と浮力との釣り合い位置をゆっくりと通過することになるため、フロートは、その自重と浮力との釣り合い位置においても、簡単に下降し難くなり、フロートと連結した水平軸部材と排水弁装置本体の突起との係合が摩擦等によって簡単に外れ難くなるという問題がある。
また、このようにフロートと連結した水平軸部材と排水弁装置本体の突起との係合が外れにくくなると、この係合が外れるタイミングにもばらつきが生じ易く、洗浄水タンクから便器に排出される洗浄水量や排水終了時の洗浄水タンク内の死水水位（デッドウォーターライン（ＤＷＬ））もばらつくといった問題がある。 In such a conventional drain valve device described in Patent Document 1, the rate at which the water level in the water storage section descends is set to a very slow speed before the drain valve in the open state starts the valve closing operation. Therefore, a sufficient amount of washing water can be supplied from the washing water tank to the toilet.
However, the lower the water level in the reservoir, the slower the float. In particular, when the opening area of the small hole in the reservoir is set to be extremely small, the water level in the reservoir gradually passes through the balance position between the float's own weight and buoyancy as the washing water flows out from the small hole at a smaller flow rate. Therefore, the float is not easily lowered even in the balance position between its own weight and buoyancy, and the engagement between the horizontal shaft member connected to the float and the protrusion of the drain valve device main body is easily caused by friction or the like. There is a problem that it becomes difficult to come off.
In addition, when the engagement between the horizontal shaft member connected to the float and the protrusion of the drain valve device main body is difficult to be disengaged, the disengagement timing is likely to vary, and the water is discharged from the flush water tank to the toilet. There is a problem that the amount of washing water and the dead water level (dead water line (DWL)) in the washing water tank at the end of drainage also vary.

そこで、本発明は、上述した従来技術の問題点を解決するためになされたものであり、洗浄水タンクの排水口から便器に供給される洗浄水量のばらつきを防ぐことができる排水弁装置を提供することを目的としている。   Accordingly, the present invention has been made to solve the above-described problems of the prior art, and provides a drain valve device that can prevent variations in the amount of flush water supplied from the drain of the flush water tank to the toilet. The purpose is to do.

上記の目的を達成するために、本発明は、便器を洗浄する洗浄水を貯える洗浄水タンクの排水弁装置であって、洗浄水タンクの底面に配置された排水口を開閉する弁体と、この弁体の動きを制御する制御筒であって、洗浄水を貯水する貯水領域を形成する貯水部を備え、この貯水部に貯水された洗浄水を所定の流量で上記洗浄水タンク内へ流出させる開口が形成された上記制御筒と、上記弁体に係合可能に取り付けられて上記制御筒の貯水部内の水位の低下により上記弁体との係合が解除されると下降するように上記制御筒の貯水部内に設けられたフロートと、上記弁体が上記排水口を開放した後、上記制御筒の貯水部内の水位が下降して上記フロートの自重と浮力との釣り合い位置を通過したとき、上記フロートが上記制御筒の貯水部内の水位と共に下降して上記フロートと上記弁体との係合が解除されて上記弁体の閉弁動作が開始されるように、上記貯水部内の貯水領域における上記釣り合い位置よりも上方の所定高さ位置から下方の貯水領域を急激に減少させる貯水領域減少手段と、を有することを特徴としている。
このように構成された本発明においては、制御筒の貯水部内の貯水領域において、貯水領域減少手段により、フロートの釣り合い位置（フロートの自重と浮力との釣り合い位置）よりも上方の所定高さ位置から下方の貯水領域が急激に減少するため、弁体が排水口を開放した後、制御筒の貯水部内の水位が下降してフロートの釣り合い位置を通過する際に、制御筒の貯水部内の水位の下降速度を早めることができる。この結果、制御筒の貯水部内の水位がフロートの釣り合い位置を通過した際に、フロートと弁体との係合を滑らかに解除し、フロートの下降を滑らかに開始することができ、弁体を滑らかに閉弁させることができる。これらの結果、洗浄水タンクの排水口から排出される洗浄水量のばらつきを防ぐことができる。 In order to achieve the above object, the present invention is a drain valve device for a wash water tank for storing wash water for washing a toilet, and a valve body that opens and closes a drain port disposed on the bottom surface of the wash water tank, A control cylinder that controls the movement of the valve body, and includes a water storage section that forms a water storage area for storing cleaning water, and the cleaning water stored in the water storage section flows out into the cleaning water tank at a predetermined flow rate. The control cylinder in which the opening to be formed is formed, and the control cylinder is attached so as to be engageable with the valve body, and is lowered when the engagement with the valve body is released due to a decrease in the water level in the water storage portion of the control cylinder. After the float provided in the water storage part of the control cylinder and the valve body open the drain, the water level in the water storage part of the control cylinder descends and passes the balance position between the weight of the float and the buoyancy The float is in the water reservoir of the control cylinder. A predetermined height above the balance position in the water storage region in the water storage section so that the engagement between the float and the valve body is released and the valve body is closed. And a storage area reduction means for rapidly decreasing the storage area below the position.
In the present invention configured as described above, in the water storage area in the water storage section of the control cylinder, a predetermined height position above the float balance position (balance position between the float's own weight and buoyancy) by the water storage area reduction means. Since the water storage area below the abruptly decreases, the water level in the water storage part of the control cylinder is lowered when the water level in the control cylinder water storage part drops and passes the float balance position after the valve body opens the drainage port. The descent speed can be increased. As a result, when the water level in the water storage section of the control cylinder passes the float balance position, the engagement between the float and the valve body can be smoothly released, and the lowering of the float can be started smoothly. It can be closed smoothly. As a result, it is possible to prevent variation in the amount of cleaning water discharged from the drain port of the cleaning water tank.

本発明において、好ましくは、上記貯水領域減少手段は、上記制御筒の貯水部内の底部の一部を底上げするように形成された段部であり、この段部の上面は、上記貯水部の底上げ面を形成し、上記釣り合い位置よりも上方に位置している。
このように構成された本発明においては、制御筒の貯水部内の底部の一部を底上げするように形成された段部を制御筒の貯水部の貯水領域減少手段とすることにより、弁体が排水口を開放した後、制御筒の貯水部内の水位が下降し、貯水部内のフロートの釣り合い位置（フロートの自重と浮力との釣り合い位置）よりも上方に位置する貯水部の段部の上面（底上げ面）を通過すると、制御筒の貯水部内の貯水領域が急激に減少するため、貯水部内の水位の下降速度を早めることができる。この結果、貯水部内の水位がさらに下降してフロートの釣り合い位置を通過するときの水位の下降速度を早めることもできるため、フロートと弁体との係合を滑らかに解除してフロートの下降を滑らかに開始することができ、弁体を滑らかに閉弁させることができる。これらの結果、洗浄水タンクの排水口から排出される洗浄水量のばらつきを防ぐことができる。 In the present invention, preferably, the water storage area reducing means is a step portion formed so as to raise a part of a bottom portion in the water storage portion of the control cylinder, and an upper surface of the step portion is raised to the bottom of the water storage portion. A surface is formed and is located above the balance position.
In the present invention configured as described above, the valve body is formed by using the step portion formed so as to raise a part of the bottom portion in the water storage portion of the control cylinder as the water storage area reducing means of the water storage portion of the control cylinder. After opening the drain, the water level in the water storage part of the control cylinder descends, and the upper surface of the step part of the water storage part located above the balance position of the float in the water storage part (the balance position of the float's own weight and buoyancy) ( When passing through the bottom-up surface), the water storage area in the water storage section of the control cylinder is rapidly reduced, so that the descent speed of the water level in the water storage section can be increased. As a result, since the water level in the water storage part further descends and the water level descending speed when passing through the float balance position can be accelerated, the engagement between the float and the valve body is smoothly released to lower the float. It can start smoothly and can close a valve body smoothly. As a result, it is possible to prevent variation in the amount of cleaning water discharged from the drain port of the cleaning water tank.

本発明において、好ましくは、上記制御筒の貯水部に形成された開口は、上記貯水部の下方位置にほぼ水平方向にスリット状に延びるように形成され、更に、上記制御筒の開口の一部と連通する所定幅の連通口が形成され且つ上記制御筒の開口の外側に取り付けられる遮蔽部材を有し、この遮蔽部材は、上記制御筒への取付位置を変更することにより、上記制御筒の開口と上記連通口との連通面積を調整して上記制御筒の貯水部から上記洗浄水タンク内へ流出させる洗浄水量を調整可能である。
このように構成された本発明においては、制御筒の貯水部に形成された開口が貯水部の下方位置にほぼ水平方向にスリット状に延びるように形成されているため、遮蔽部材の取付位置を変更して制御筒の開口と遮蔽部材の連通口との連通面積を調整する際に、制御筒の開口から遮蔽部材の連通口を通過するときの上下方向の水圧のばらつきの影響を抑え、制御筒の開口から流出させる洗浄水量のばらつきを抑えることができる。これらの結果、洗浄水タンクの排水口から排出される洗浄水量の総量がばらつくことを防ぐことができる。 In the present invention, preferably, the opening formed in the water storage part of the control cylinder is formed to extend in a slit shape in a substantially horizontal direction at a position below the water storage part, and further, a part of the opening of the control cylinder And a shielding member that is attached to the outside of the opening of the control cylinder. The shielding member changes the mounting position of the control cylinder by changing the attachment position to the control cylinder. By adjusting the communication area between the opening and the communication port, it is possible to adjust the amount of cleaning water flowing out from the water storage portion of the control cylinder into the cleaning water tank.
In the present invention configured as described above, the opening formed in the water storage part of the control cylinder is formed so as to extend in a slit shape in a substantially horizontal direction at a position below the water storage part. When adjusting and adjusting the communication area between the control cylinder opening and the shielding member communication port, the effect of variation in water pressure in the vertical direction when passing from the control cylinder opening to the shielding member communication port is controlled and controlled. Variations in the amount of washing water flowing out from the opening of the cylinder can be suppressed. As a result, it is possible to prevent variation in the total amount of cleaning water discharged from the drain of the cleaning water tank.

つぎに、本発明は、上記排水弁装置を備えたことを特徴とする洗浄水タンク装置である。
このように構成された本発明においては、便器を洗浄する洗浄水量のばらつきを防ぐことができる洗浄水タンク装置を提供することができる。 Next, the present invention is a washing water tank device comprising the drain valve device.
In this invention comprised in this way, the washing water tank apparatus which can prevent the dispersion | variation in the amount of washing water which wash | cleans a toilet bowl can be provided.

つぎに、本発明は、上記洗浄水タンク装置を備えたことを特徴とする水洗大便器である。
このように構成された本発明においては、便器を洗浄する洗浄水量のばらつきを防ぐことができる水洗大便器を提供することができる。 Next, the present invention is a flush toilet comprising the flush water tank apparatus.
In this invention comprised in this way, the flush toilet which can prevent the dispersion | variation in the amount of washing water which wash | cleans a toilet bowl can be provided.

本発明の排水弁装置によれば、洗浄水タンクの排水口から便器に供給される洗浄水量のばらつきを防ぐことができる。   According to the drain valve device of the present invention, it is possible to prevent variations in the amount of washing water supplied to the toilet from the drain port of the washing water tank.

本発明の一実施形態による排水弁装置を備えた洗浄水タンク装置が適用された水洗大便器において、便座、便蓋及び洗浄水タンク装置の蓋体を取り外した状態を示す斜視図である。1 is a perspective view showing a state where a toilet seat, a toilet lid, and a lid of a flush water tank device are removed in a flush toilet to which a flush water tank device including a drain valve device according to an embodiment of the present invention is applied. 本発明の一実施形態による排水弁装置を備えた洗浄水タンク装置の内部構造を前方斜め上方から見た斜視図である。It is the perspective view which looked at the internal structure of the washing water tank apparatus provided with the drain valve device by one embodiment of the present invention from the diagonally forward upper part. 本発明の一実施形態による排水弁装置を示す分解正面図である。It is a disassembled front view which shows the drain valve apparatus by one Embodiment of this invention. 本発明の一実施形態による排水弁装置を示す左側面図である。It is a left view which shows the drain valve apparatus by one Embodiment of this invention. 図４のＶ−Ｖ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の小洗浄モード及び大洗浄モードにおける排水開始前の状態を示す。It is sectional drawing seen along the VV line | wire of FIG. 4, and shows the state before the waste_water | drain start in the small washing mode and large washing mode of the drain valve apparatus by one Embodiment of this invention. 図４のＶ−Ｖ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の小洗浄モードにおける開弁時の状態を示す。It is sectional drawing seen along the VV line | wire of FIG. 4, and shows the state at the time of valve opening in the small washing mode of the drain valve apparatus by one Embodiment of this invention. 図４のＶ−Ｖ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の大洗浄モードにおける開弁時の状態を示す。It is sectional drawing seen along the VV line | wire of FIG. 4, and shows the state at the time of valve opening in the large washing mode of the drain valve apparatus by one Embodiment of this invention. 図４のＶ−Ｖ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の小洗浄モードにおける排水途中の状態を示す。It is sectional drawing seen along the VV line of FIG. 4, and shows the state in the middle of the waste_water | drain in the small washing mode of the drain valve apparatus by one Embodiment of this invention. 図４のＶ−Ｖ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の小洗浄モードにおける排水終了時の状態を示す。It is sectional drawing seen along the VV line | wire of FIG. 4, and shows the state at the time of the completion | finish of drainage in the small washing mode of the drain valve apparatus by one Embodiment of this invention. 本発明の一実施形態による排水弁装置の制御筒を示す斜視図である。It is a perspective view which shows the control cylinder of the drain valve apparatus by one Embodiment of this invention. 本発明の一実施形態による排水弁装置の制御筒を示す左側面図である。It is a left view which shows the control cylinder of the drain valve apparatus by one Embodiment of this invention. 図１１のＸＩＩ−ＸＩＩ線に沿って見た断面図である。It is sectional drawing seen along the XII-XII line | wire of FIG. 図４のＶ−Ｖ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の大洗浄モードにおける排水途中の第１の状態を示す。It is sectional drawing seen along the VV line | wire of FIG. 4, and shows the 1st state in the middle of drainage in the large washing mode of the drain valve apparatus by one Embodiment of this invention. 図４のＸＩＶ−ＸＩＶ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の大洗浄モードにおける排水途中の第１の状態を示す。It is sectional drawing seen along the XIV-XIV line | wire of FIG. 4, and shows the 1st state in the middle of drainage in the large washing mode of the drain valve apparatus by one Embodiment of this invention. 図４のＶ−Ｖ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の大洗浄モードにおける排水途中の第２の状態を示す。It is sectional drawing seen along the VV line | wire of FIG. 4, and shows the 2nd state in the middle of drainage in the large washing mode of the drain valve apparatus by one Embodiment of this invention. 図４のＸＩＶ−ＸＩＶ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の大洗浄モードにおける排水途中の第２の状態を示す。It is sectional drawing seen along the XIV-XIV line | wire of FIG. 4, and shows the 2nd state in the middle of drainage in the large washing mode of the drain valve apparatus by one Embodiment of this invention. 図４のＶ−Ｖ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の大洗浄モードにおける排水途中の第３の状態を示す。It is sectional drawing seen along the VV line | wire of FIG. 4, and shows the 3rd state in the middle of the waste_water | drain in the large washing mode of the drain valve apparatus by one Embodiment of this invention. 図４のＸＩＶ−ＸＩＶ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の大洗浄モードにおける排水途中の第３の状態を示す。It is sectional drawing seen along the XIV-XIV line | wire of FIG. 4, and shows the 3rd state in the middle of drainage in the large washing mode of the drain valve apparatus by one Embodiment of this invention. 図４のＶ−Ｖ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の大洗浄モードにおける排水終了時の状態を示す。It is sectional drawing seen along the VV line | wire of FIG. 4, and shows the state at the time of completion | finish of drainage in the large washing mode of the drain valve apparatus by one Embodiment of this invention. 図４のＸＩＶ−ＸＩＶ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の大洗浄モードにおける排水終了時の状態を示す。It is sectional drawing seen along the XIV-XIV line | wire of FIG. 4, and shows the state at the time of completion | finish of drainage in the large washing mode of the drain valve apparatus by one Embodiment of this invention.

つぎに、添付図面により、本発明の一実施形態による排水弁装置、この排水弁装置を備えた洗浄水タンク装置、及び、この洗浄水タンク装置を備えた水洗大便器について説明する。
まず、図１により、本発明の一実施形態による排水弁装置を備えた洗浄水タンク装置が適用された水洗便器を説明する。
図１は、本発明の一実施形態による排水弁装置を備えた洗浄水タンク装置が適用された水洗大便器において、便座、便蓋及び洗浄水タンク装置の蓋体を取り外した状態を示す斜視図である。 Next, a drain valve device according to an embodiment of the present invention, a flush water tank device equipped with the drain valve device, and a flush toilet equipped with the flush water tank device will be described with reference to the accompanying drawings.
First, referring to FIG. 1, a flush toilet to which a flush water tank apparatus equipped with a drain valve apparatus according to an embodiment of the present invention is applied will be described.
FIG. 1 is a perspective view showing a state where a toilet seat, a toilet lid, and a lid of a flush water tank apparatus are removed in a flush toilet to which a flush water tank apparatus including a drain valve device according to an embodiment of the present invention is applied. It is.

図１に示すように、符号１は、サイホン作用を利用してボウル部内の汚物を吸い込んで排水トラップ管路から一気に外部に排出する、いわゆる、サイホン式の水洗大便器であり、この水洗大便器１は、陶器製の便器本体２を備え、この便器本体２には、ボウル部４と、このボウル部４の下部と連通するトラップ管路６がそれぞれ形成されている。
便器本体２のボウル部４の上縁部には、内側にオーバーハングしたリム８と、便器本体２の後方側の内部に形成される導水路（図示せず）から供給される洗浄水を吐水する第１吐水口１０が形成され、この第１吐水口１０から吐水された洗浄水は、旋回しながら下降してボウル部４を洗浄するようになっている。 As shown in FIG. 1, reference numeral 1 is a so-called siphon type flush toilet that sucks filth in the bowl portion using a siphon action and discharges it from the drain trap pipe to the outside at once. This flush toilet 1 includes a toilet bowl body 2 made of earthenware. A bowl section 4 and a trap pipe 6 communicating with a lower portion of the bowl section 4 are formed in the toilet bowl body 2.
To the upper edge of the bowl portion 4 of the toilet body 2, flush water supplied from a rim 8 overhanging on the inside and a water conduit (not shown) formed in the rear side of the toilet body 2 is spouted. The first water outlet 10 is formed, and the wash water discharged from the first water outlet 10 descends while swirling to wash the bowl portion 4.

ボウル部４の下方には、溜水面が鎖線Ｗ０で示された溜水部１２が形成されている。この溜水部１２の下方には、排水トラップ管路６の入口６ａが開口し、この入口６ａから後方の排水トラップ管路６は排水ソケット（図示せず）を介して床下の排出管（図示せず）に接続されている。
また、ボウル部４の溜水面Ｗ０の上方位置には、便器本体２の後方側の内部に形成される導水路（図示せず）から供給される洗浄水を吐水する第２吐水口１４が形成され、この第２吐水口１４から吐水される洗浄水が溜水部１２の溜水を上下方向に旋回させる旋回流を生じさせるようになっている。 Below the bowl portion 4 is formed a water storage portion 12 whose water storage surface is indicated by a chain line W0. An inlet 6a of a drain trap pipe 6 is opened below the water reservoir 12, and a drain trap pipe 6 behind the inlet 6a is connected to a drain pipe (not shown) through a drain socket (not shown). (Not shown).
Further, a second water discharge port 14 for discharging wash water supplied from a water conduit (not shown) formed in the rear side of the toilet body 2 is formed above the water storage surface W0 of the bowl portion 4. The wash water discharged from the second water discharge port 14 generates a swirling flow that swirls the water stored in the water storage unit 12 in the vertical direction.

便器本体２の後方側の上面には、便器本体２に供給する洗浄水を貯水する洗浄水タンク装置１６が設けられている。
なお、本実施形態では、上述したサイホン式の水洗大便器に洗浄水タンク装置１６を適用した例について説明するが、このようなサイホン式の水洗大便器に限定されず、ボウル部内の水の落差による流水作用で汚物を押し流す、いわゆる、洗い落し式の水洗大便器等の他のタイプの水洗便器にも適用可能である。 A flush water tank device 16 for storing flush water supplied to the toilet bowl 2 is provided on the upper surface on the rear side of the toilet bowl 2.
In addition, although this embodiment demonstrates the example which applied the washing water tank apparatus 16 to the siphon type flush toilet mentioned above, it is not limited to such a siphon type flush toilet, The head of the water in a bowl part The present invention is also applicable to other types of flush toilets such as a so-called flush toilet that flushes filth by flowing water.

つぎに、図２により、洗浄水タンク装置１６の内部構造について説明する。
図２は、本発明の一実施形態による排水弁装置を備えた洗浄水タンク装置の内部構造を前方斜め上方から見た斜視図である。
図２に示すように、洗浄水タンク装置１６は、水洗大便器１を洗浄する洗浄水を貯水する貯水タンク１８を備え、この貯水タンク１８の底部には、便器本体２の導水路（図示せず）と連通する排水口２０が形成され、貯水タンク１８内の洗浄水が便器本体２の導水路（図示せず）へと供給されるようになっている。また、貯水タンク１８は、便器の種類に応じて、貯水する洗浄水の量が異なっている。 Next, the internal structure of the cleaning water tank device 16 will be described with reference to FIG.
FIG. 2 is a perspective view of the internal structure of the washing water tank apparatus provided with the drain valve device according to the embodiment of the present invention, as viewed obliquely from the upper front.
As shown in FIG. 2, the flush water tank device 16 includes a reservoir tank 18 for storing flush water for washing the flush toilet 1, and a water conduit (not shown) of the toilet body 2 is provided at the bottom of the reservoir tank 18. A drain outlet 20 communicating with the water tank 18 is formed, and the wash water in the water storage tank 18 is supplied to a water conduit (not shown) of the toilet body 2. Further, the amount of washing water stored in the water storage tank 18 differs depending on the type of toilet bowl.

図２に示すように、洗浄水タンク装置１６の貯水タンク１８内には、この貯水タンク１８内に洗浄水を供給する給水装置２２と、貯水タンク１８に貯えられた洗浄水について排水口２０を開放して便器本体２の導水路（図示せず）に流出させる排水弁装置２４（詳細は後述する）が設けられている。   As shown in FIG. 2, in the water storage tank 18 of the cleaning water tank device 16, a water supply device 22 that supplies cleaning water into the water storage tank 18 and a drain outlet 20 for the cleaning water stored in the water storage tank 18 are provided. A drain valve device 24 (details will be described later) is provided that opens and flows out to a water conduit (not shown) of the toilet body 2.

給水装置２２は、外部の給水源（図示せず）に接続され貯水タンク１８の底部から上方に延びる給水管２６と、この給水管２６の上端部に取り付けられ、給水管２６から給水される洗浄水の貯水タンク１８内への吐水と止水を切り替える給水バルブ２８と、貯水タンク１８内の水位の変動に応じて上下動して給水バルブ２８による吐水と止水を切り替えるフロート３０とを備えている。   The water supply device 22 is connected to an external water supply source (not shown) and extends upward from the bottom of the water storage tank 18. The water supply device 22 is attached to the upper end of the water supply pipe 26 and is supplied with water from the water supply pipe 26. A water supply valve 28 that switches between water discharge and water stoppage into the water storage tank 18 and a float 30 that moves up and down according to fluctuations in the water level in the water storage tank 18 and switches water discharge and water stoppage by the water supply valve 28 are provided. Yes.

給水管２６の外周側下端部には、吐水口３２が開口し、給水バルブ２８からの洗浄水がこの吐水口３２から貯水タンク１８内に吐水されるようになっている。
給水装置２２は、更に、給水バルブ２８に接続されたリフィール管３４を備え、このリフィール管３４の下流端部は、後述する排水弁装置２４のオーバーフロー管３６の上端開口の上方近傍に位置するように、リフィール管３４の一部がオーバーフロー管３６又は貯水タンク１８内の所定箇所に固定されている。 A water discharge port 32 is opened at the lower end on the outer peripheral side of the water supply pipe 26, and the wash water from the water supply valve 28 is discharged into the water storage tank 18 from the water discharge port 32.
The water supply device 22 further includes a refill pipe 34 connected to the water supply valve 28, and the downstream end portion of the refill pipe 34 is positioned near the upper end opening of the overflow pipe 36 of the drain valve device 24 described later. In addition, a part of the refill pipe 34 is fixed to a predetermined location in the overflow pipe 36 or the water storage tank 18.

給水装置２２においては、後述する排水弁装置２４により、貯水タンク１８内の洗浄水が便器に排水されると、洗浄水の水位が低下してフロート３０が下降し、それにより給水バルブ２８が開き、吐水口３２からの吐水が開始し、洗浄水タンク装置１６の外部の給水源（図示せず）から貯水タンク１８内への吐水が開始されるようになっている。
さらに、吐水が継続されて貯水タンク１８内の水位が上昇すると、フロート３０が上昇し、それにより給水バルブ２８が閉じ、吐水口３２からの吐水が止水される。これにより、貯水タンク１８内の洗浄水の水位が満水時の所定水位に維持されるようになっている。 In the water supply device 22, when the wash water in the water storage tank 18 is drained to the toilet by the drain valve device 24 described later, the water level of the wash water is lowered and the float 30 is lowered, thereby opening the water supply valve 28. Water discharge from the water discharge port 32 is started, and water discharge from the water supply source (not shown) outside the washing water tank device 16 into the water storage tank 18 is started.
Further, when water discharge continues and the water level in the water storage tank 18 rises, the float 30 rises, thereby closing the water supply valve 28 and stopping water discharge from the water discharge port 32. Thereby, the water level of the washing water in the water storage tank 18 is maintained at a predetermined water level when the water is full.

つぎに、図１〜図９を参照して、本発明の一実施形態による排水弁装置２４の詳細について説明する。
図３は本発明の一実施形態による排水弁装置を示す分解正面図であり、図４は本発明の一実施形態による排水弁装置を示す左側面図である。つぎに、図５は、図４のＶ−Ｖ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の小洗浄モード及び大洗浄モードにおける排水開始前の状態を示す。また、図６及び図７は、図４のＶ−Ｖ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の小洗浄モード及び大洗浄モードにおける開弁時の状態をそれぞれ示す。さらに、図８及び図９は、図４のＶ−Ｖ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の小洗浄モードにおける排水途中の状態及び排水終了時の状態をそれぞれ示す。ここで、図６〜図８においては、洗浄水の流れを矢印で概略的に示している。 Next, details of the drain valve device 24 according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 3 is an exploded front view showing a drain valve device according to an embodiment of the present invention, and FIG. 4 is a left side view showing the drain valve device according to an embodiment of the present invention. Next, FIG. 5 is a cross-sectional view taken along line VV in FIG. 4, and shows a state before the start of drainage in the small washing mode and the large washing mode of the drain valve device according to one embodiment of the present invention. . 6 and 7 are cross-sectional views taken along the line VV in FIG. 4, and the drain valve device according to one embodiment of the present invention is in a state when the valve is opened in the small washing mode and the large washing mode. Respectively. 8 and 9 are cross-sectional views taken along the line VV in FIG. 4, and the state during the drainage and the end of the drainage in the small washing mode of the drain valve device according to the embodiment of the present invention. Each state is shown. Here, in FIGS. 6 to 8, the flow of the cleaning water is schematically indicated by arrows.

排水弁装置２４は、図３及び図４に示すように、貯水タンク１８の底面に取り付けられ且つ便器本体２の導水路（図示せず）に連通する排水口２０を形成する排水口ユニット３８と、この排水口ユニット３８の上端に取り付けられた排水弁ユニット４０を備えている。   3 and 4, the drain valve device 24 is attached to the bottom surface of the water storage tank 18 and has a drain port unit 38 that forms a drain port 20 that communicates with a water conduit (not shown) of the toilet body 2. The drain valve unit 40 attached to the upper end of the drain port unit 38 is provided.

排水弁装置２４の排水口ユニット３８は、貯水タンク１８の底面１８ａの所定位置に取り付けられて排水口２０を形成する排水口形成部材４２を備えている。
この排水口形成部材４２の下端部は、貯水タンク１８の底面１８ａを貫き、シール部材４４を介して締結部材４６によって締結され、排水口形成部材４２が貯水タンク１８の底面１８ａに固定されている。 The drain port unit 38 of the drain valve device 24 includes a drain port forming member 42 that is attached to a predetermined position on the bottom surface 18 a of the water storage tank 18 and forms the drain port 20.
The lower end portion of the drain port forming member 42 penetrates the bottom surface 18 a of the water storage tank 18 and is fastened by a fastening member 46 through a seal member 44, and the drain port forming member 42 is fixed to the bottom surface 18 a of the water tank 18. .

また、排水口形成部材４２の外周の一部には、オーバーフロー管３６が取り付けられるオーバーフロー管取付部４８が設けられ、オーバーフロー管３６がオーバーフロー管取付部４８を介して排水口形成部材４２の内部の排水口２０と連通するようになっている。   An overflow pipe mounting portion 48 to which the overflow pipe 36 is attached is provided on a part of the outer periphery of the drain port forming member 42, and the overflow pipe 36 is disposed inside the drain port forming member 42 via the overflow pipe mounting portion 48. It communicates with the drain port 20.

さらに、排水口形成部材４２は、排水口２０の上縁に沿って全周に亘って形成され且つ上方に突出する弁座５０を備え、この弁座５０と排水弁ユニット４０の弁体５２が当接することにより、排水口２０が閉鎖されるようになっている。
また、排水口形成部材４２は、弁座５０から外側に向かって所定間隔を置いた位置から排水口形成部材４２の上端部５４まで上下方向に延びる複数の支柱部５６を備え、これらの支柱部５６は、周方向に沿って所定間隔を置いて配置されており、隣り合う支柱部５６同士の間に排水弁装置２４の外側の洗浄水を排水口２０へ流入させるための複数の連通口５８を形成している。 Furthermore, the drain port forming member 42 includes a valve seat 50 that is formed over the entire periphery along the upper edge of the drain port 20 and protrudes upward. The valve seat 50 and the valve body 52 of the drain valve unit 40 are provided with each other. By contact, the drainage port 20 is closed.
Further, the drain port forming member 42 includes a plurality of column portions 56 extending in the vertical direction from a position spaced apart from the valve seat 50 toward the outside to the upper end portion 54 of the drain port forming member 42. 56 are arranged at predetermined intervals along the circumferential direction, and a plurality of communication ports 58 for allowing the cleaning water outside the drain valve device 24 to flow into the drain port 20 between the adjacent column portions 56. Is forming.

つぎに、図３〜図５に示すように、排水弁装置２４の排水弁ユニット４０は、弁体５２と、この弁体５２を保持する弁体保持部材６０と、この弁体保持部材６０に下端部が取り付けられて上下方向に延びる樹脂製の主軸部材６２と、排水口ユニット３８の排水口形成部材４２の上端部５４に取り付けられて弁体５２の動きを制御する内側制御筒部材６４と、流量調整用の開口６４ａが形成された内側制御筒部材６４の側周壁部６４ｂの外側に取り付けられる遮蔽部材６６と、大洗浄モードにおける閉弁動作を開始させる樹脂製の大洗浄用フロート部材６８と、小洗浄モードにおける閉弁動作を開始させる樹脂製の小洗浄用フロート部材７０及び樹脂製のカム部材７２と、これらの部材７０，７２を支持する樹脂製の支持部材７４と、これらの部材６０〜７４を外側から取り囲む外側制御筒部材７６と、主軸部材６２の上端部６２ａに取り付けられて主軸部材６２の引き上げ操作による弁体５２の開弁操作を操作する操作ワイヤ７８と、外側制御筒部材７６を上方から保持すると共に操作ワイヤ７８の上下動をガイドするガイド部材８０と、を備えている。   Next, as shown in FIGS. 3 to 5, the drain valve unit 40 of the drain valve device 24 includes a valve body 52, a valve body holding member 60 that holds the valve body 52, and the valve body holding member 60. A resin main shaft member 62 having a lower end attached and extending in the vertical direction, and an inner control cylinder member 64 attached to the upper end portion 54 of the drain port forming member 42 of the drain port unit 38 and controlling the movement of the valve body 52, A shielding member 66 attached to the outside of the side peripheral wall 64b of the inner control cylinder member 64 in which the flow rate adjusting opening 64a is formed, and a resin-made large washing float member 68 for starting the valve closing operation in the large washing mode. A resin-made small washing float member 70 and a resin-made cam member 72 for starting the valve closing operation in the small washing mode, a resin-made support member 74 for supporting these members 70, 72, and An outer control cylinder member 76 that surrounds the members 60 to 74 from the outside, an operation wire 78 that is attached to the upper end portion 62a of the main shaft member 62 and operates the valve opening operation of the valve body 52 by pulling up the main shaft member 62, and outer control And a guide member 80 that holds the cylindrical member 76 from above and guides the vertical movement of the operation wire 78.

弁体５２は、シートパッキン等のシール部材からなり、図３及び図５に示すように、主軸部材６２の下端部に取り付けられた弁体保持部材６０の上側保持部６０ａと下側保持部６０ｂとの間に嵌め込まれて固着されている。
また、主軸部材６２は、内側制御筒部材６４のほぼ中央部に形成されたガイド穴６４ｃに挿入されて軸方向（上下方向）に摺動可能に取り付けられ、弁体５２は、この主軸部材６２と共に上下動し、排水口２０を開閉する排水弁として機能するようになっている。 The valve body 52 is made of a seal member such as a seat packing, and as shown in FIGS. 3 and 5, the upper holding portion 60a and the lower holding portion 60b of the valve body holding member 60 attached to the lower end portion of the main shaft member 62. It is inserted and fixed between.
The main shaft member 62 is inserted into a guide hole 64c formed at substantially the center of the inner control cylinder member 64 and is slidably mounted in the axial direction (vertical direction). The valve body 52 is attached to the main shaft member 62. At the same time, it moves up and down and functions as a drain valve that opens and closes the drain port 20.

つぎに、図２、図３、及び図５〜図７に示すように、操作ワイヤ７８は、ガイド部材８０のガイド孔８０ａを通過した一端部が主軸部材６２の上端部６２ａに取り付けられ、他端部が貯水タンク１８の内部に取り付けられたワイヤ巻取り装置８２に取り付けられている。このワイヤ巻取り装置８２は、貯水タンク１８の外部に取り付けられた操作レバー８４と連結されており、この操作レバー８４を大洗浄又は小洗浄の所定の洗浄モードを実行させる方向に回動操作することにより、この操作レバー８４の回動と連動してワイヤ巻取り装置８２が作動し、操作ワイヤ７８がワイヤ巻取り装置８２によって巻き取られ、この巻き取られる操作ワイヤ７８により、排水弁ユニット４０の主軸部材６２が引き上げられ、この主軸部材６２と共に弁体保持部材６０及び弁体５２が上昇するようになっている。   Next, as shown in FIGS. 2, 3, and 5 to 7, one end of the operation wire 78 that has passed through the guide hole 80 a of the guide member 80 is attached to the upper end 62 a of the main shaft member 62. The end is attached to a wire take-up device 82 attached to the inside of the water storage tank 18. The wire winding device 82 is connected to an operation lever 84 attached to the outside of the water storage tank 18, and the operation lever 84 is rotated in a direction to execute a predetermined cleaning mode of large cleaning or small cleaning. As a result, the wire winding device 82 is operated in conjunction with the rotation of the operation lever 84, the operation wire 78 is taken up by the wire winding device 82, and the drain valve unit 40 is taken up by the taken up operation wire 78. The main shaft member 62 is pulled up, and the valve body holding member 60 and the valve body 52 are raised together with the main shaft member 62.

例えば、操作レバー８４を所定の方向（小洗浄モードを実行する方向）に回動操作すると、ワイヤ巻取り装置８２が作動し、操作ワイヤ７８が大洗浄モードの場合の最大巻き取り量よりも少ない巻き取り量で巻き取られ、排水弁ユニット４０の主軸部材６２及び弁体保持部材６０がそれぞれの最高高さ位置よりも低い所定の高さ位置まで引き上げられるようになっている。このとき、弁座５０に対する弁体５２の上昇高さ（ストローク）ＨがＨ１となり、洗浄水タンク装置１６の排水弁装置２４による水洗大便器１の便器本体２への小洗浄モードの排水が開始されるようになっている（図６参照）。
一方、操作レバー８４を所定の方向とは反対方向（大洗浄モードを実行する方向）に回動操作すると、ワイヤ巻取り装置８２が作動し、操作ワイヤ７８が所定の最大量の巻き取り量で巻き取られ、排水弁ユニット４０の主軸部材６２及び弁体保持部材６０がそれぞれの最高高さ位置まで引き上げられるようになっている。このとき、弁座５０に対する弁体５２の上昇高さ（ストローク）Ｈが最大高さ（最大ストローク）Ｈ２となり（Ｈ２＞Ｈ１）、洗浄水タンク装置１６の排水弁装置２４による水洗大便器１の便器本体２への大洗浄モードの排水が開始されるようになっている（図７参照）。 For example, when the operation lever 84 is rotated in a predetermined direction (a direction in which the small cleaning mode is executed), the wire winding device 82 is activated, and the operation wire 78 is smaller than the maximum winding amount in the large cleaning mode. The main shaft member 62 and the valve body holding member 60 of the drain valve unit 40 are pulled up to a predetermined height position lower than the maximum height position. At this time, the height (stroke) H of the valve body 52 with respect to the valve seat 50 becomes H1, and the drainage in the small washing mode to the toilet body 2 of the flush toilet 1 by the drain valve device 24 of the flush water tank device 16 is started. (See FIG. 6).
On the other hand, when the operation lever 84 is rotated in the direction opposite to the predetermined direction (the direction in which the large cleaning mode is executed), the wire winding device 82 is activated, and the operation wire 78 has a predetermined maximum winding amount. The main shaft member 62 and the valve body holding member 60 of the drain valve unit 40 are wound up to their respective maximum height positions. At this time, the rising height (stroke) H of the valve body 52 with respect to the valve seat 50 becomes the maximum height (maximum stroke) H2 (H2> H1), and the flush toilet 1 by the drain valve device 24 of the flush water tank device 16 is used. Drainage of the large washing mode to the toilet body 2 is started (see FIG. 7).

なお、本実施形態では、一例として、操作レバー８４については、使用者が操作レバー８４を直接回転操作してワイヤ巻取り装置８２を作動させる手動式の操作形態について説明するが、このような形態に限定されず、操作レバー８４を回動させるためのモータ等の駆動手段を設け、外部に設定された操作ボタン（図示せず）又は人感センサー（図示せず）からの指令信号によって駆動手段の作動を自動的に制御するような操作形態にしてもよい。   In this embodiment, as an example, the operation lever 84 will be described with reference to a manual operation mode in which the user directly operates the operation lever 84 to operate the wire winding device 82. However, the driving means such as a motor for rotating the operation lever 84 is provided, and the driving means is driven by a command signal from an externally set operation button (not shown) or a human sensor (not shown). The operation mode may be such that the operation of the system is automatically controlled.

つぎに、図３及び図５〜図９に示すように、支持部材７４の軸方向の中間部分には、小洗浄用フロート部材７０が取り付けられており、支持部材７４への小洗浄用フロート部材７０の取付位置が軸方向（上下方向）に変更可能となっている。
また、支持部材７４の下端部は、詳細は後述する内側制御筒部材６４の上下方向に貫く支持部材用取付穴６４ｄに挿入され、支持部材７４の上端部は、ガイド部材８０の支持部材用取付穴８０ｂに挿入されており、支持部材７４がこれらの支持部材用取付穴６４ｄ，８０ｂの中で上下方向に摺動可能に保持されている。 Next, as shown in FIGS. 3 and 5 to 9, a small cleaning float member 70 is attached to an intermediate portion in the axial direction of the support member 74, and the small cleaning float member is attached to the support member 74. The attachment position 70 can be changed in the axial direction (vertical direction).
Further, the lower end portion of the support member 74 is inserted into a support member mounting hole 64d penetrating in the vertical direction of the inner control cylinder member 64, which will be described in detail later, and the upper end portion of the support member 74 is attached to the support member for the guide member 80. The support member 74 is inserted into the hole 80b and is held in the support member mounting holes 64d and 80b so as to be slidable in the vertical direction.

カム部材７２は、支持部材７４のヒンジ結合部７４ａに回動可能に取り付けられるヒンジ部７２ａと、主軸部材６２の上端部６２ａから下方の所定位置に外方に突出するように形成された係合突起６２ｂと係合可能な係合凹部７２ｂを備えている。   The cam member 72 is a hinge portion 72a rotatably attached to the hinge coupling portion 74a of the support member 74, and an engagement formed so as to protrude outward from the upper end portion 62a of the main shaft member 62 to a predetermined position. An engaging recess 72b that can engage with the protrusion 62b is provided.

大洗浄用フロート部材６８は、詳細は後述する内側制御筒部材６４の貯水部８６内に収容されるフロート本体部６８ａと、このフロート本体部６８ａの両側の上端から水平方向に延びる一対のアーム部６８ｂと、これらのアーム部６８ｂのそれぞれの先端部から外側に突出するように形成され且つ内側制御筒部材６４の上端部の一対のヒンジ結合孔６４ｅに回動可能に取り付けられる一対のヒンジ突起部６８ｃと、アーム部６８ｂのそれぞれの先端部から下方に所定長さ延びた先端部に形成され且つ主軸部材６２の係合突起６２ｂから軸方向下方の所定位置に外方に突出する係合突起６２ｃと係合可能な係合凹部６８ｄを備えている。   The large washing float member 68 includes a float main body portion 68a housed in a water storage portion 86 of the inner control cylinder member 64, which will be described in detail later, and a pair of arm portions extending horizontally from the upper ends on both sides of the float main body portion 68a. 68b and a pair of hinge projections formed so as to protrude outward from the respective distal ends of these arm portions 68b and rotatably attached to a pair of hinge coupling holes 64e at the upper end of the inner control cylinder member 64 68c and an engagement protrusion 62c that is formed at a distal end portion extending a predetermined length downward from the respective distal end portions of the arm portion 68b and protrudes outward from the engagement protrusion 62b of the main shaft member 62 to a predetermined position in the axially lower direction. The engaging recess 68d is engageable.

図３〜図９に示すように、外側制御筒部材７６の側周面７６ａには、上下方向に延びる複数のスリット穴７６ｂが形成されている。これらの外側制御筒部材７６のスリット穴７６ｂの下端よりも上方に且つ外側制御筒部材７６の外側に貯水されている貯水タンク１８内の洗浄水は、スリット穴７６ｂを経て外側制御筒部材７６の内部に流入することができるようになっている。   As shown in FIGS. 3 to 9, a plurality of slit holes 76 b extending in the vertical direction are formed in the side peripheral surface 76 a of the outer control cylinder member 76. The cleaning water in the water storage tank 18 stored above the lower end of the slit hole 76b of the outer control cylinder member 76 and outside the outer control cylinder member 76 passes through the slit hole 76b and flows into the outer control cylinder member 76. It can flow into the interior.

また、図５に示すように、排水弁装置２４の小洗浄モード及び大洗浄モードにおける排水開始前の状態では、弁体５２が弁座５０に当接して排水口２０が閉止され、貯水タンク１８内の水位が満水時の止水水位Ｗｆとなり、外側制御筒部材７６の外側に貯水されている貯水タンク１８内の洗浄水がスリット穴７６ｂを経て外側制御筒部材７６の内部に流入し、大洗浄用フロート部材６８及び小洗浄用フロート部材７０が水没している状態となっている。
また、カム部材７２の係合凹部７２ｂは主軸部材６２の係合突起６２ｂよりも上方に位置し、両者７２ｂ，６２ｂが係合していない状態となっており、大洗浄用フロート部材６８の係合凹部６８ｄも主軸部材６２の係合突起６２ｃよりも上方に位置しており、両者６８ｄ，６２ｃが係合していない状態となっている。 Further, as shown in FIG. 5, when the drain valve device 24 is in the small washing mode and the large washing mode before the drainage is started, the valve body 52 comes into contact with the valve seat 50, the drain port 20 is closed, and the water storage tank 18. The water level inside becomes the still water level Wf when the water is full, and the wash water in the water storage tank 18 stored outside the outer control cylinder member 76 flows into the outer control cylinder member 76 through the slit hole 76b. The cleaning float member 68 and the small cleaning float member 70 are submerged.
Further, the engaging recess 72b of the cam member 72 is located above the engaging protrusion 62b of the main shaft member 62, and the both 72b and 62b are not engaged with each other. The mating recess 68d is also positioned above the engagement protrusion 62c of the main shaft member 62, and the two 68d and 62c are not engaged.

つぎに、図６に示すように、排水弁装置２４の小洗浄モードにおける開弁時の状態では、弁体５２が弁座５０に対してストロークＨ１で上昇して排水口２０が開放されており、外側制御筒部材７６の外側に貯水されている貯水タンク１８内の洗浄水と外側制御筒部材７６の内部の洗浄水が、外側制御筒部材７６のスリット穴７６ｂ及び排水口形成部材４２の連通口５８によって連通しているため、貯水タンク１８内の水位と外側制御筒部材７６の内部の水位が共に満水時の止水水位Ｗｆよりも低い水位Ｗ１となり、大洗浄用フロート部材６８及び小洗浄用フロート部材７０が水没している状態となっている。
また、支持部材７４は小洗浄用フロート部材７０の浮力により上昇した状態となっている。
さらに、弁体５２と共に主軸部材６２とその係合突起６２ｂについてもストロークＨ１で上昇しているため、カム部材７２の係合凹部７２ｂが主軸部材６２の係合突起６２ｂと係合している状態となっており、主軸部材６２及び弁体５２の下降動作（閉弁動作）が拘束された状態となっている。一方、大洗浄用フロート部材６８の係合凹部６８ｄは、主軸部材６２の係合突起６２ｃよりも上方に位置しており、両者６８ｄ，６２ｃが係合していない状態となっている。 Next, as shown in FIG. 6, in the state when the drain valve device 24 is opened in the small washing mode, the valve body 52 rises with respect to the valve seat 50 at the stroke H1 and the drain port 20 is opened. The cleaning water in the water storage tank 18 stored on the outside of the outer control cylinder member 76 and the cleaning water in the outer control cylinder member 76 communicate with the slit hole 76b of the outer control cylinder member 76 and the drain port forming member 42. Since the communication is made through the port 58, the water level in the water storage tank 18 and the water level in the outer control cylinder member 76 both become the water level W1 lower than the water stop water level Wf when full, and the large washing float member 68 and the small washing. The float member 70 is in a state where it is submerged.
Further, the support member 74 is raised by the buoyancy of the small cleaning float member 70.
Further, since the main shaft member 62 and its engaging projection 62b as well as the valve body 52 are raised at the stroke H1, the engaging recess 72b of the cam member 72 is engaged with the engaging projection 62b of the main shaft member 62. Thus, the lowering operation (valve closing operation) of the main shaft member 62 and the valve body 52 is constrained. On the other hand, the engaging recess 68d of the large cleaning float member 68 is positioned above the engaging protrusion 62c of the main shaft member 62, and the two 68d and 62c are not engaged.

一方、図７に示すように、排水弁装置２４の大洗浄モードにおける開弁時の状態では、弁体５２が弁座５０に対して最大ストロークＨ２で上昇して排水口２０が開放されており、貯水タンク１８内の水位が満水時の止水水位Ｗｆよりも低い水位Ｗ２となり、外側制御筒部材７６の外側に貯水されている貯水タンク１８内の洗浄水と外側制御筒部材７６の内部の洗浄水が、外側制御筒部材７６のスリット穴７６ｂ及び排水口形成部材４２の連通口５８によって連通しているため、大洗浄用フロート部材６８は水没しているが、小洗浄用フロート部材７０とカム部材７２のそれぞれの上方部分は水位Ｗ２よりも上方に表出している状態となっている。
また、弁体５２と共に主軸部材６２とその係合突起６２ｂについても最大ストロークＨ２で上昇しているため、カム部材７２の係合凹部７２ｂが主軸部材６２の係合突起６２ｂの下方に位置し、両者７２ｂ，６２ｂが係合していない状態となっている。しかしながら、大洗浄用フロート部材６８の係合凹部６８ｄは、主軸部材６２の係合突起６２ｃと係合している状態となっており、主軸部材６２及び弁体５２の下降動作（閉弁動作）が拘束された状態となっている。 On the other hand, as shown in FIG. 7, when the drain valve device 24 is opened in the large washing mode, the valve body 52 rises with respect to the valve seat 50 with the maximum stroke H2 and the drain port 20 is opened. The water level in the water storage tank 18 becomes a water level W2 lower than the water stop water level Wf when the water is full, and the cleaning water in the water storage tank 18 stored outside the outer control cylinder member 76 and the inside of the outer control cylinder member 76 are stored. Since the cleaning water communicates with the slit hole 76b of the outer control cylinder member 76 and the communication port 58 of the drain port forming member 42, the large cleaning float member 68 is submerged, but the small cleaning float member 70 and Each upper portion of the cam member 72 is exposed above the water level W2.
Further, since the main shaft member 62 and its engaging projection 62b as well as the valve body 52 are also raised at the maximum stroke H2, the engaging recess 72b of the cam member 72 is positioned below the engaging projection 62b of the main shaft member 62, Both 72b and 62b are not engaged. However, the engagement recess 68d of the large washing float member 68 is engaged with the engagement protrusion 62c of the main shaft member 62, and the main shaft member 62 and the valve body 52 are lowered (valve closing operation). Is in a restrained state.

つぎに、図８に示すように、排水弁装置２４の小洗浄モードにおける排水途中の状態では、排水口２０から便器本体２への排水に伴って、貯水タンク１８内の水位と外側制御筒部材７６の内部の水位が、図６に示す水位Ｗ１よりも低い水位Ｗ３まで低下するため、この水位の低下に連動して小洗浄用フロート部材７０の浮力が減少し、小洗浄用フロート部材７０と支持部材７４が下降するようになっている。
また、支持部材７４が下降すると、これに連動してカム部材７２が、その係合凹部７２ｂと主軸部材６２の係合突起６２ｂとの係合を解除する方向（図８の上方）に向ってヒンジ部７２ａを中心に回動するようになっている。さらに、カム部材７２の係合凹部７２ｂと主軸部材６２の係合突起６２ｂとの係合が解除されると、主軸部材６２及び弁体５２が水位の低下と共に下降し、排水弁装置２４の小洗浄モードにおける閉弁動作が開始されるようになっている。
なお、大洗浄用フロート部材６８の係合凹部６８ｄは、主軸部材６２の係合突起６２ｃよりも上方に位置しており、両者６８ｄ，６２ｃが係合していない状態となっているため、主軸部材６２及び弁体５２の下降による閉弁動作が妨げられないようになっている。 Next, as shown in FIG. 8, in the middle of drainage in the small washing mode of the drain valve device 24, the water level in the water storage tank 18 and the outer control cylinder member are accompanied by drainage from the drain port 20 to the toilet body 2. Since the water level inside 76 is lowered to a water level W3 lower than the water level W1 shown in FIG. 6, the buoyancy of the small washing float member 70 is reduced in conjunction with the lowering of the water level, and the small washing float member 70 and The support member 74 is lowered.
Further, when the support member 74 is lowered, the cam member 72 is interlocked with this and moves in a direction (upward in FIG. 8) in which the engagement recess 72b and the engagement protrusion 62b of the main shaft member 62 are disengaged. The hinge 72a is pivoted about the center. Further, when the engagement between the engagement recess 72b of the cam member 72 and the engagement protrusion 62b of the main shaft member 62 is released, the main shaft member 62 and the valve body 52 are lowered as the water level decreases, and the drain valve device 24 is small. The valve closing operation in the cleaning mode is started.
The engaging recess 68d of the large cleaning float member 68 is located above the engaging protrusion 62c of the main shaft member 62, and the main shaft 68d and 62c are not engaged with each other. The valve closing operation caused by the lowering of the member 62 and the valve body 52 is not hindered.

つぎに、図８において主軸部材６２及び弁体５２が水位の低下と共にさらに下降すると、図９に示すように、弁体５２が弁座５０に当接し、排水口２０が閉止され、排水弁装置２４の小洗浄モードにおける排水が終了するようになっている。また、排水終了時の状態では、貯水タンク１８内の水位と外側制御筒部材７６の内部の水位が、図８に示す水位Ｗ３よりも低い水位Ｗ４まで低下し、死水水位（ＤＷＬ）となるようになっている。   Next, when the main shaft member 62 and the valve body 52 are further lowered as the water level is lowered in FIG. 8, the valve body 52 comes into contact with the valve seat 50 and the drain port 20 is closed as shown in FIG. The drainage in 24 small cleaning modes is completed. Further, in the state at the end of drainage, the water level in the water storage tank 18 and the water level in the outer control cylinder member 76 are lowered to the water level W4 lower than the water level W3 shown in FIG. 8, and become the dead water level (DWL). It has become.

つぎに、図１０〜図２０を参照して、内側制御筒部材６４の詳細について説明する。
図１０は本発明の一実施形態による排水弁装置の制御筒を示す斜視図であり、図１１は本発明の一実施形態による排水弁装置の制御筒を示す左側面図であり、図１２は図１１のＸＩＩ−ＸＩＩ線に沿って見た断面図である。
まず、図１３は、図４のＶ−Ｖ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の大洗浄モードにおける排水途中の第１の状態を示し、図１４は、図４のＸＩＶ−ＸＩＶ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の大洗浄モードにおける排水途中の第１の状態を示す。
つぎに、図１５は、図４のＶ−Ｖ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の大洗浄モードにおける排水途中の第２の状態を示し、図１６は、図４のＸＩＶ−ＸＩＶ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の大洗浄モードにおける排水途中の第２の状態を示す。
また、図１７は、図４のＶ−Ｖ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の大洗浄モードにおける排水途中の第３の状態を示し、図１８は、図４のＸＩＶ−ＸＩＶ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の大洗浄モードにおける排水途中の第３の状態を示す。
さらに、図１９は、図４のＶ−Ｖ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の大洗浄モードにおける排水終了時の状態を示し、図２０は、図４のＸＩＶ−ＸＩＶ線に沿って見た断面図であり、本発明の一実施形態による排水弁装置の大洗浄モードにおける排水終了時の状態を示す。
ここで、図１３〜図２０においては、洗浄水の流れを矢印で概略的に示している。 Next, the details of the inner control cylinder member 64 will be described with reference to FIGS.
10 is a perspective view showing a control cylinder of a drain valve device according to an embodiment of the present invention, FIG. 11 is a left side view showing a control cylinder of a drain valve device according to an embodiment of the present invention, and FIG. It is sectional drawing seen along the XII-XII line | wire of FIG.
First, FIG. 13 is a cross-sectional view taken along line V-V in FIG. 4 and shows a first state during drainage in the large cleaning mode of the drain valve device according to one embodiment of the present invention. These are sectional drawings seen along the XIV-XIV line of FIG. 4, and show the 1st state in the middle of drainage in the large washing mode of the drain valve apparatus by one Embodiment of this invention.
Next, FIG. 15 is a cross-sectional view taken along line VV in FIG. 4, showing a second state during drainage in the large washing mode of the drain valve device according to one embodiment of the present invention. 16 is a cross-sectional view taken along line XIV-XIV in FIG. 4 and shows a second state during drainage in the large cleaning mode of the drain valve device according to the embodiment of the present invention.
17 is a cross-sectional view taken along line VV in FIG. 4 and shows a third state during drainage in the large cleaning mode of the drain valve device according to one embodiment of the present invention. These are sectional drawings seen along the XIV-XIV line of Drawing 4, and show the 3rd state in the middle of drainage in the large washing mode of the drain valve device by one embodiment of the present invention.
Further, FIG. 19 is a cross-sectional view taken along the line VV in FIG. 4 and shows a state at the end of drainage in the large washing mode of the drain valve device according to one embodiment of the present invention. It is sectional drawing seen along the XIV-XIV line | wire of FIG. 4, and shows the state at the time of completion | finish of drainage in the large washing mode of the drain valve apparatus by one Embodiment of this invention.
Here, in FIGS. 13 to 20, the flow of the cleaning water is schematically indicated by arrows.

まず、図１０及び図１２に示すように、内側制御筒部材６４の貯水部８６は、その貯水領域を急激に減少させるための手段（以下「貯水領域減少手段」）として、貯水部８６内の底面８８の一部を底上げするように形成された段部９０を備え、この段部９０は、貯水部８６内の底面８８から上方に延びるように形成された内壁面９０ａを備え、この段部９０の内壁面９０ａの上端からほぼ水平方向に延びるように形成された上面が底上げ面９０ｂを形成している。   First, as shown in FIGS. 10 and 12, the water storage portion 86 of the inner control cylinder member 64 serves as a means for rapidly reducing the water storage area (hereinafter referred to as “water storage area reduction means”). The step portion 90 is formed so as to raise a part of the bottom surface 88. The step portion 90 includes an inner wall surface 90a formed so as to extend upward from the bottom surface 88 in the water storage portion 86. An upper surface formed so as to extend substantially horizontally from the upper end of the inner wall surface 90a of the 90 forms a bottom-up surface 90b.

つぎに、内側制御筒部材６４の貯水部８６内に形成されて洗浄水が貯水される貯水領域Ａは、この底上げ面９０ｂから上方に且つ内壁面９０と平行に延びる内壁面９２と、底上げ面９０ｂにおける貯水部８６の中央側に形成される中央側内壁面９４と、この中央側内壁面９４と対向するように形成される外側内壁面９６と、隣り合う２つの中央側内壁面９４同士を接続するように形成される中間内壁面９８と、外側内壁面９６同士を接続するように内側制御筒部材６４の部分的に円筒状に形成された側周壁部６４ｂの内側周壁面１００によって形成されている。   Next, a water storage region A that is formed in the water storage portion 86 of the inner control cylinder member 64 and stores the wash water includes an inner wall surface 92 that extends upward from the bottom raised surface 90b and parallel to the inner wall surface 90, and a bottom raised surface. A central inner wall surface 94 formed on the central side of the water storage section 86 in 90b, an outer inner wall surface 96 formed so as to face the central inner wall surface 94, and two adjacent central inner wall surfaces 94 The inner inner wall surface 98 formed so as to be connected and the inner peripheral wall surface 100 of the side peripheral wall portion 64b formed in a partially cylindrical shape of the inner control cylinder member 64 so as to connect the outer inner wall surfaces 96 to each other. ing.

すなわち、図１０、図１２、図１４、図１６、図１８及び図２０に示すように、貯水部８６内に洗浄水が貯水される貯水領域Ａは、貯水部８６内の段部９０の底上げ面９０ｂと同一の平面を境界面Ｐ１として、その境界面Ｐ１よりも上方に形成される貯水部８６の貯水領域を上方貯水領域Ａ１とし、境界面Ｐ１よりも下方に形成される貯水部８６の貯水領域を下方貯水領域Ａ２とすると、上方貯水領域Ａ１内の平面視で見た断面積Ｓ１が、下方貯水領域Ａ２内の平面視で見た断面積Ｓ２よりも大きくなっており、貯水部８６内の洗浄水の水位ｗが下降して境界面Ｐ１を通過する前後で貯水部８６内の貯水量が急激に減少するようになっている。   That is, as shown in FIGS. 10, 12, 14, 16, 18, and 20, the water storage region A in which the wash water is stored in the water storage portion 86 is raised to the bottom of the stepped portion 90 in the water storage portion 86. The same plane as the surface 90b is defined as the boundary surface P1, the water storage region of the water storage portion 86 formed above the boundary surface P1 is defined as the upper water storage region A1, and the water storage portion 86 formed below the boundary surface P1. When the water storage area is the lower water storage area A2, the cross-sectional area S1 seen in plan view in the upper water storage area A1 is larger than the cross-sectional area S2 seen in plan view in the lower water storage area A2, and the water storage section 86 The amount of water stored in the water storage section 86 is drastically reduced before and after the cleaning water level w decreases and passes through the boundary surface P1.

また、図１２、図１４、図１６、図１８及び図２０に示すように、内側制御筒部材６４の貯水部８６内の底上げ面９０ｂは、貯水部８６内の大洗浄用フロート部材６８の自重Ｇによる下向きの力と浮力Ｆによる上向きの力との釣り合い位置に相当する貯水部８６内の水位ｗｎよりも上方に位置しており、貯水部８６内に貯水された洗浄水による大洗浄用フロート部材６８の上向きの浮力Ｆが大洗浄用フロート部材６８の下向きの自重を上回った場合には、大洗浄用フロート部材６８が内側制御筒部材６４の貯水部８６内で上昇し、大洗浄用フロート部材６８の上向きの浮力Ｆが大洗浄用フロート部材６８の下向きの自重を下回った場合には、大洗浄用フロート部材６８が内側制御筒部材６４の貯水部８６内で下降するようになっている。
より具体的に説明すると、内側制御筒部材６４は、貯水部８６内の水位ｗに応じて大洗浄用フロート部材６８の上下動、すなわち、内側制御筒部材６４のヒンジ結合孔６４ｅにおける大洗浄用フロート部材６８のヒンジ突起部６８ｃ（図３参照）を中心とする回動を制御することができるようになっている。 Also, as shown in FIGS. 12, 14, 16, 18 and 20, the bottom raised surface 90b in the water storage portion 86 of the inner control cylinder member 64 is the weight of the large washing float member 68 in the water storage portion 86. Float for large washing by the wash water stored in the water reservoir 86, located above the water level wn in the water reservoir 86 corresponding to the balance position of the downward force due to G and the upward force due to buoyancy F When the upward buoyancy F of the member 68 exceeds the downward weight of the large washing float member 68, the large washing float member 68 rises in the water storage portion 86 of the inner control cylinder member 64, and the large washing float. When the upward buoyancy F of the member 68 falls below the downward weight of the large cleaning float member 68, the large cleaning float member 68 is lowered in the water storage portion 86 of the inner control cylinder member 64. .
More specifically, the inner control cylinder member 64 moves up and down the large cleaning float member 68 according to the water level w in the water reservoir 86, that is, the large cleaning cylinder 64e of the inner control cylinder member 64 The rotation around the hinge protrusion 68c (see FIG. 3) of the float member 68 can be controlled.

また、図１０〜図２０に示す内側制御筒部材６４の側周壁部６４ｂの下方の所定位置には、内側制御筒部材６４の貯水部８６内の洗浄水を内側制御筒部材６４の外部の貯水タンク１８内に流出させる流量調整用の開口６４ａが内側制御筒部材６４の側周壁部６４ｂの周方向に沿ってスリット状に延びるように形成されている。この内側制御筒部材６４の流量調整用の開口６４ａは、図１１に示すように、内側制御筒部材６４の側周壁部６４ｂの周方向に沿って矩形的な開口面積で段階的に変化するように形成されている。
なお、本実施形態では、内側制御筒部材６４の流量調整用の開口６４ａの開口形状がその周方向に沿って矩形的に変化し、流量調整用の開口６４ａの開口面積が段階的に変化するような形態について説明するが、このような形態に限定されず、流量調整用の開口６４ａの開口面積を周方向に沿って連続的に変化するような形態であってもよい。 In addition, at a predetermined position below the side peripheral wall portion 64 b of the inner control cylinder member 64 shown in FIGS. 10 to 20, cleaning water in the water storage portion 86 of the inner control cylinder member 64 is stored outside the inner control cylinder member 64. An opening 64a for adjusting the flow rate flowing out into the tank 18 is formed to extend in a slit shape along the circumferential direction of the side peripheral wall 64b of the inner control cylinder member 64. As shown in FIG. 11, the flow rate adjusting opening 64 a of the inner control cylinder member 64 changes stepwise in a rectangular opening area along the circumferential direction of the side peripheral wall portion 64 b of the inner control cylinder member 64. Is formed.
In the present embodiment, the opening shape of the flow rate adjustment opening 64a of the inner control cylinder member 64 changes rectangularly along the circumferential direction, and the opening area of the flow rate adjustment opening 64a changes stepwise. Although such a form is demonstrated, it is not limited to such a form, The form which changes continuously the opening area of the opening 64a for flow volume adjustment along the circumferential direction may be sufficient.

また、図１０及び図１１に示すように、遮蔽部材６６の部分的に円環状の壁部６６ａの内周面には、内側制御筒部材６４の側周壁部６４ｂに形成された突起６４ｆに嵌合可能な複数の嵌合凹部６６ａ（図１０参照）が形成されている。
さらに、遮蔽部材６６の壁部６６ａには、内側制御筒部材６４の側周壁部６４ｂに遮蔽部材６６を取り付けた状態で、内側制御筒部材６４の流量調整用の開口６４ａと連通可能な連通口６６ｃが形成されている。この連通口６６ｃの周方向の長さｄ１は、内側制御筒部材６４の流量調整用の開口６４ａの周方向の長さｄ２よりも短くなっており、連通口６６ｃの縦方向の長さｄ３は、流量調整用の開口６４ａの縦方向の最大長さｄ４とほぼ等しい長さとなっている。 Further, as shown in FIGS. 10 and 11, the projection member 64f formed on the side peripheral wall portion 64b of the inner control cylinder member 64 is fitted on the inner peripheral surface of the partially annular wall portion 66a of the shielding member 66. A plurality of fitting recesses 66a (see FIG. 10) that can be combined are formed.
Further, the wall 66 a of the shielding member 66 has a communication port that can communicate with the flow rate adjustment opening 64 a of the inner control cylinder member 64 in a state where the shielding member 66 is attached to the side peripheral wall 64 b of the inner control cylinder member 64. 66c is formed. The circumferential length d1 of the communication port 66c is shorter than the circumferential length d2 of the flow rate adjusting opening 64a of the inner control cylinder member 64, and the vertical length d3 of the communication port 66c is The length 644 is substantially equal to the vertical maximum length d4 of the flow rate adjusting opening 64a.

さらに、遮蔽部材６６を内側制御筒部材６４の側周壁部６４ｂに取り付ける際、内側制御筒部材６４の側周壁部６４ｂに対する遮蔽部材６６の取付位置について、図１０及び図１１に示すように、周方向Ｌ又は周方向Ｒにずらすことにより、内側制御筒部材６４の突起６４ｆと嵌合させる遮蔽部材６６の嵌合凹部６６ｂを変更することができ、内側制御筒部材６４の流量調整用の開口６４ａと遮蔽部材６６の連通口６６ｃとが連通する流路の断面積である連通面積Ｓ３（図１１参照）を変更することができるようになっている。
例えば、内側制御筒部材６４の側周壁部６４ｂに対する遮蔽部材６６の取付位置を周方向Ｌにずらす程、内側制御筒部材６４の流量調整用の開口６４ａと遮蔽部材６６の連通口６６ｃとが連通する連通面積Ｓ３が大きくなり、内側制御筒部材６４の側周壁部６４ｂに対する遮蔽部材６６の取付位置を周方向Ｒにずらす程、内側制御筒部材６４の流量調整用の開口６４ａと遮蔽部材６６の連通口６６ｃとが連通する連通面積Ｓ３が小さくなるようになっている。
また、内側制御筒部材６４の流量調整用の開口６４ａと遮蔽部材６６の連通口６６ｃとの連通面積Ｓ３を調整する際に、遮蔽部材６６の連通口６６ｃを内側制御筒部材６４の流量調整用の開口６４ａに対して水平方向にずらすことにより、内側制御筒部材６４の流量調整用の開口６４ａから遮蔽部材６６の連通口６６ｃを通過するときの上下方向の水圧のばらつきの影響を抑え、内側制御筒部材６４の流量調整用の開口６４ａから流出させる洗浄水量のばらつきを抑えることができるようになっている。 Furthermore, when the shielding member 66 is attached to the side peripheral wall portion 64b of the inner control cylinder member 64, the attachment position of the shielding member 66 with respect to the side peripheral wall portion 64b of the inner control cylinder member 64 is as shown in FIGS. By shifting in the direction L or the circumferential direction R, the fitting recess 66b of the shielding member 66 to be fitted with the protrusion 64f of the inner control cylinder member 64 can be changed, and the flow rate adjustment opening 64a of the inner control cylinder member 64 can be changed. The communication area S3 (see FIG. 11), which is the cross-sectional area of the flow path that communicates with the communication port 66c of the shielding member 66, can be changed.
For example, the flow rate adjustment opening 64a of the inner control cylinder member 64 and the communication port 66c of the shield member 66 communicate with each other as the mounting position of the shielding member 66 with respect to the side peripheral wall portion 64b of the inner control cylinder member 64 is shifted in the circumferential direction L. The communication area S3 to be increased and the attachment position of the shielding member 66 with respect to the side peripheral wall portion 64b of the inner control cylinder member 64 is shifted in the circumferential direction R, so that the flow rate adjustment opening 64a of the inner control cylinder member 64 and the shielding member 66 are increased. A communication area S3 that communicates with the communication port 66c is reduced.
Further, when adjusting the communication area S3 between the flow rate adjusting opening 64a of the inner control cylinder member 64 and the communication port 66c of the shielding member 66, the communication port 66c of the shielding member 66 is used for adjusting the flow rate of the inner control cylinder member 64. By shifting in the horizontal direction with respect to the opening 64a of the inner control cylinder member 64, the influence of variation in water pressure in the vertical direction when passing through the communication port 66c of the shielding member 66 from the opening 64a for adjusting the flow rate of the inner control cylinder member 64 is suppressed. Variations in the amount of washing water that flows out from the flow rate adjustment opening 64a of the control cylinder member 64 can be suppressed.

また、外側制御筒部材７６の側周面７６ａの下方には、その周方向に沿って開口７６ｃが部分的に形成され、内側制御筒部材６４に外側制御筒部材７６を取り付けた状態では、外側制御筒部材７６の開口７６ｃにより、遮蔽部材６６の連通口６６ｃと貯水タンク１８内とが連通可能となっており、内側制御筒部材６４の側周壁部６４ｂに対する遮蔽部材６６の取付位置を調整して内側制御筒部材６４の開口６４ａと遮蔽部材６６の連通口６６ｃとの連通面積Ｓ３を調整した状態で、内側制御筒部材６４の貯水部８６内の洗浄水を開口６４ａから遮蔽部材６６の連通口６６ｃ及び外側制御筒部材７６の開口７６ｃを経て貯水タンク１８内へ流出させることができるようになっている。   Further, an opening 76c is partially formed along the circumferential direction below the side peripheral surface 76a of the outer control cylinder member 76, and the outer control cylinder member 76 is attached to the inner control cylinder member 64 in the outer side. The communication port 66c of the shielding member 66 and the inside of the water storage tank 18 can communicate with each other through the opening 76c of the control cylinder member 76, and the attachment position of the shielding member 66 with respect to the side peripheral wall portion 64b of the inner control cylinder member 64 is adjusted. In the state where the communication area S3 between the opening 64a of the inner control cylinder member 64 and the communication port 66c of the shielding member 66 is adjusted, the cleaning water in the water reservoir 86 of the inner control cylinder member 64 is communicated from the opening 64a to the shielding member 66. The water can be discharged into the water storage tank 18 through the opening 66c and the opening 76c of the outer control cylinder member 76.

つぎに、図１３及び図１４に示すように、排水弁装置２４の大洗浄モードにおける排水途中の第１の状態では、排水口２０から便器本体２への排水に伴って、貯水タンク１８内の水位と外側制御筒部材７６の内部の水位が、図７に示す水位Ｗ２よりも低い水位Ｗ５まで低下するため、この水位の低下に連動して小洗浄用フロート部材７０の浮力が減少し、小洗浄用フロート部材７０と支持部材７４が下降するようになっている。また、支持部材７４が下降すると、これに連動してカム部材７２が、その係合凹部７２ｂと主軸部材６２の係合突起６２ｂとの係合を解除する方向（図１３及び図１４の上方）に向ってヒンジ部７２ａを中心に回動するようになっている。
しかしながら、大洗浄用フロート部材６８においては、水位Ｗ５が、貯水部８６内の大洗浄用フロート部材６８の自重Ｇと浮力Ｆとの釣り合い位置に相当する貯水部８６内の水位ｗｎよりも上方に位置しており、洗浄水による浮力Ｆが大洗浄用フロート部材６８の自重Ｇを上回り、大洗浄用フロート部材６８の係合凹部６８ｄが、主軸部材６２の係合突起６２ｃと係合している状態となっており、主軸部材６２及び弁体５２の下降動作（閉弁動作）が拘束された状態となっているため、排水弁装置２４の大洗浄モードにおける閉弁動作は開始されないようになっている。 Next, as shown in FIGS. 13 and 14, in the first state in the middle of draining in the large washing mode of the drain valve device 24, the water in the water storage tank 18 is drained from the drain port 20 to the toilet body 2. Since the water level and the water level inside the outer control cylinder member 76 are lowered to a water level W5 lower than the water level W2 shown in FIG. 7, the buoyancy of the small washing float member 70 is reduced in conjunction with the lowering of the water level. The cleaning float member 70 and the support member 74 are lowered. When the support member 74 is lowered, the cam member 72 is interlocked with the engagement member 72b to release the engagement between the engagement recess 72b and the engagement protrusion 62b of the main shaft member 62 (upper direction in FIGS. 13 and 14). It turns around the hinge part 72a toward the center.
However, in the large cleaning float member 68, the water level W5 is higher than the water level wn in the water storage portion 86 corresponding to the balance position between the weight G of the large cleaning float member 68 in the water storage portion 86 and the buoyancy F. The buoyancy F by the washing water exceeds the own weight G of the large washing float member 68, and the engagement recess 68 d of the large washing float member 68 is engaged with the engagement protrusion 62 c of the main shaft member 62. Since the lowering operation (valve closing operation) of the main shaft member 62 and the valve body 52 is restricted, the valve closing operation in the large washing mode of the drain valve device 24 is not started. ing.

つぎに、図１５及び図１６に示すように、排水弁装置２４の大洗浄モードにおける排水途中の第２の状態では、排水口２０から便器本体２への排水に伴って、貯水タンク１８内における外側制御筒部材７６の外部の水位が、図１３及び図１４に示す水位Ｗ５よりも低い水位Ｗ６まで低下する一方、内側制御筒部材６４の貯水部８６内の水位については、遮蔽部材６６の連通口６６ｃと重なる内側筒部材６４の流調調整用の開口６４ａの大きさ（連通面積Ｓ３）が排水口形成部材４２の連通口５８や排水口２０の大きさ（開口面積）よりも小さくなるため、内側制御筒部材６４の貯水部８６内の水位ｗ１の低下速度ｖ１が、貯水タンク１８内における外側制御筒部材７６の外部の水位Ｗ６の低下速度Ｖ１よりも遅くなるようになっている。
また、大洗浄用フロート部材６８においては、内側制御筒部材６４の貯水部８６内の水位ｗ１が、貯水部８６内の大洗浄用フロート部材６８の自重Ｇと浮力Ｆとの釣り合い位置に相当する貯水部８６内の水位ｗｎよりも上方に位置しており、洗浄水による浮力Ｆが大洗浄用フロート部材６８の自重Ｇを上回り、大洗浄用フロート部材６８の係合凹部６８ｄが、主軸部材６２の係合突起６２ｃと係合している状態となっており、主軸部材６２及び弁体５２の下降動作（閉弁動作）が依然拘束された状態となるようになっている。 Next, as shown in FIGS. 15 and 16, in the second state during the drainage in the large washing mode of the drain valve device 24, the drainage from the drain port 20 to the toilet body 2 is accompanied by the drainage in the water storage tank 18. While the water level outside the outer control cylinder member 76 decreases to a water level W6 lower than the water level W5 shown in FIGS. 13 and 14, the water level in the water reservoir 86 of the inner control cylinder member 64 is communicated with the shielding member 66. Since the size (communication area S3) of the flow adjustment opening 64a of the inner cylindrical member 64 that overlaps the port 66c is smaller than the size (opening area) of the communication port 58 and the drain port 20 of the drain port forming member 42. The lowering speed v1 of the water level w1 in the water storage section 86 of the inner control cylinder member 64 is made slower than the lowering speed V1 of the water level W6 outside the outer control cylinder member 76 in the water storage tank 18.
Further, in the large washing float member 68, the water level w <b> 1 in the water storage portion 86 of the inner control cylinder member 64 corresponds to a balance position between the own weight G and the buoyancy F of the large washing float member 68 in the water storage portion 86. It is located above the water level wn in the water storage part 86, the buoyancy F by the washing water exceeds the own weight G of the large washing float member 68, and the engaging recess 68d of the large washing float member 68 is the main shaft member 62. In this state, the lowering operation (valve closing operation) of the main shaft member 62 and the valve body 52 is still constrained.

つぎに、図１７及び図１８に示すように、排水弁装置２４の大洗浄モードにおける排水途中の第３の状態では、排水口２０から便器本体２への排水に伴って、貯水タンク１８内における外側制御筒部材７６の外部の水位が、図１５及び図１６に示す水位Ｗ６よりも低い水位Ｗ７まで低下する一方、内側制御筒部材６４の貯水部８６内の水位が上方貯水領域Ａ１と下方貯水領域Ａ２との境界面Ｐ１を通過して大洗浄用フロート部材６８の自重Ｇと浮力Ｆとの釣り合い位置に相当する貯水部８６内の水位ｗｎに達すると、貯水部８６内の洗浄水の水位が下降して境界面Ｐ１を通過する前後で貯水部８６内の貯水量が急激に減少し、内側制御筒部材６４の貯水部８６の下方貯水領域Ａ２内の水位の低下速度ｖ２が、図１５及び図１６に示す内側制御筒部材６４の貯水部８６の上方貯水領域Ａ１内の水位ｗ１の低下速度ｖ１よりも早まるようになっている。
また、大洗浄用フロート部材６８においては、貯水部８６内の水位が、図１５及び図１６に示す内側制御筒部材６４の貯水部８６の上方貯水領域Ａ１内の水位ｗ１から低下し、貯水部８６内の大洗浄用フロート部材６８の自重Ｇと浮力Ｆとの釣り合い位置に相当する貯水部８６の下方貯水領域Ａ２の水位ｗｎに達すると、洗浄水による浮力Ｆが大洗浄用フロート部材６８の自重Ｇを下回り、大洗浄用フロート部材６８が、主軸部材６２の係合突起６２ｃとの係合を解除する方向（図１７及び図１８の下方）に回動し、大洗浄用フロート部材６８の係合凹部６８ｄと主軸部材６２の係合突起６２ｃとの係合が解除され、主軸部材６２及び弁体５２の下降動作（閉弁動作）が開始されるようになっている。 Next, as shown in FIGS. 17 and 18, in the third state in the middle of drainage in the large washing mode of the drain valve device 24, in the water storage tank 18 along with drainage from the drain port 20 to the toilet body 2. While the water level outside the outer control cylinder member 76 is lowered to a water level W7 lower than the water level W6 shown in FIGS. 15 and 16, the water level in the water storage section 86 of the inner control cylinder member 64 is the upper water storage area A1 and the lower water storage. When the water level wn in the water storage part 86 corresponding to the balance position between the dead weight G and the buoyancy F of the large washing float member 68 passes through the boundary surface P1 with the region A2, the water level of the cleaning water in the water storage part 86 is reached. The water storage amount in the water storage portion 86 decreases rapidly before and after passing through the boundary surface P1, and the water level lowering speed v2 in the lower water storage region A2 of the water storage portion 86 of the inner control cylinder member 64 is shown in FIG. And the inner control shown in FIG. So that the earlier than the decrease velocity v1 water level w1 in the upper reservoir region A1 of the reservoir 86 of the member 64.
Further, in the large washing float member 68, the water level in the water storage section 86 decreases from the water level w1 in the upper water storage area A1 of the water storage section 86 of the inner control cylinder member 64 shown in FIGS. 15 and 16, and the water storage section When the water level wn of the lower water storage area A2 of the water storage section 86 corresponding to the balance position between the dead weight G of the large cleaning float member 68 and the buoyancy F in the 86 is reached, the buoyancy F by the cleaning water is increased by the large cleaning float member 68. Below the dead weight G, the large cleaning float member 68 rotates in a direction (downward in FIGS. 17 and 18) in which the main shaft member 62 is disengaged from the engaging protrusion 62c. The engagement between the engagement recess 68d and the engagement protrusion 62c of the main shaft member 62 is released, and the lowering operation (valve closing operation) of the main shaft member 62 and the valve body 52 is started.

つぎに、図１９及び図２０に示すように、排水弁装置２４の大洗浄モードにおける排水終了時の状態では、内側制御筒部材６４の流量調整用の開口６４ａから貯水タンク１８内へ流出に伴って、内側制御筒部材６４の貯水部８６の下方貯水領域Ａ２内の水位が下降して大洗浄用フロート部材６８の浮力がなくなるようになっている。また、貯水タンク１８内における外側制御筒部材７６の外部の水位は、図１７及び図１８に示す水位Ｗ７よりも低く且つ図９に示す小洗浄モード時の死水水位Ｗ４（ＤＷＬ）よりも低い水位Ｗ８まで低下し、この水位Ｗ８が死水水位（ＤＷＬ）となり、弁体５２が弁座５０に当接し、排水口２０が閉止されるようになっている。   Next, as shown in FIGS. 19 and 20, in the state when drainage is completed in the large washing mode of the drain valve device 24, the drain valve device 24 flows into the water storage tank 18 from the flow adjustment opening 64 a of the inner control cylinder member 64. Thus, the water level in the lower water storage area A2 of the water storage section 86 of the inner control cylinder member 64 is lowered so that the buoyancy of the large cleaning float member 68 is lost. Further, the water level outside the outer control cylinder member 76 in the water storage tank 18 is lower than the water level W7 shown in FIGS. 17 and 18 and lower than the dead water level W4 (DWL) in the small cleaning mode shown in FIG. The water level is lowered to W8, the water level W8 becomes the dead water level (DWL), the valve body 52 comes into contact with the valve seat 50, and the drain port 20 is closed.

なお、内側制御筒部材６４の貯水部８６の貯水領域Ａの水位の低下速度については、図１１に示すように、遮蔽部材６６を周方向Ｒにずらし、内側制御筒部材６４の開口６４ａと遮蔽部材６６の連通口６６ｃとの連通面積Ｓ３を調整して小さく設定する程、外側制御筒部材７６の外部の水位の低下速度との速度差が大きくなり、主軸部材６２及び弁体５２の下降動作（閉弁動作）が開始するタイミングが遅延され、排水終了時の貯水タンク１８内の死水水位（ＤＷＬ）が低くなり、大洗浄モード時に貯水タンク１８から便器本体２に供給される洗浄水の総量が多く設定されるようになっている。   In addition, about the fall rate of the water level of the water storage area | region A of the water storage part 86 of the inner side control cylinder member 64, as shown in FIG. 11, the shielding member 66 is shifted to the circumferential direction R, and the opening 64a of the inner side control cylinder member 64 and shielding are carried out. As the communication area S3 of the member 66 with the communication port 66c is adjusted and set to be smaller, the speed difference with the lowering speed of the water level outside the outer control cylinder member 76 increases, and the main shaft member 62 and the valve body 52 are lowered. The timing at which (valve closing operation) starts is delayed, the dead water level (DWL) in the water storage tank 18 at the end of drainage is lowered, and the total amount of wash water supplied from the water storage tank 18 to the toilet body 2 in the large wash mode Many are set.

つぎに、図１〜図２０を参照して、本発明の一実施形態による排水弁装置、この排水弁装置を備えた洗浄水タンク装置、及び、この洗浄水タンク装置を備えた水洗大便器の動作（作用）を説明する。
まず、図１〜図６、図８及び図９により、本発明の一実施形態による排水弁装置を備えた洗浄水タンク装置により実行される２種類の洗浄モードのうちの小洗浄モードについて説明する。
図５に示すように、排水弁装置２４の小洗浄モードにおける排水開始前の状態では、弁体５２が弁座５０に当接して排水口２０が閉止され、貯水タンク１８内の水位が満水時の止水水位Ｗｆとなり、外側制御筒部材７６の外側に貯水されている貯水タンク１８内の洗浄水がスリット穴７６ｂを経て外側制御筒部材７６の内部に流入し、大洗浄用フロート部材６８及び小洗浄用フロート部材７０が水没している。
また、カム部材７２の係合凹部７２ｂは主軸部材６２の係合突起６２ｂよりも上方に位置し、両者７２ｂ，６２ｂが係合していない状態となり、大洗浄用フロート部材６８の係合凹部６８ｄも主軸部材６２の係合突起６２ｃよりも上方に位置しており、両者６８ｄ，６２ｃが係合していない状態となる。 Next, referring to FIG. 1 to FIG. 20, a drain valve device according to an embodiment of the present invention, a flush water tank device equipped with the drain valve device, and a flush toilet equipped with the flush water tank device are shown. The operation (action) will be described.
First, with reference to FIGS. 1 to 6, 8, and 9, the small cleaning mode of the two types of cleaning modes executed by the cleaning water tank apparatus including the drain valve device according to the embodiment of the present invention will be described. .
As shown in FIG. 5, in the state before the drainage start in the small washing mode of the drain valve device 24, the valve body 52 contacts the valve seat 50, the drain port 20 is closed, and the water level in the water storage tank 18 is full. The flush water level in the water storage tank 18 stored on the outside of the outer control cylinder member 76 flows into the outer control cylinder member 76 through the slit hole 76b, and the large cleaning float member 68 and The small cleaning float member 70 is submerged.
Further, the engaging recess 72b of the cam member 72 is positioned above the engaging protrusion 62b of the main shaft member 62, so that the both 72b and 62b are not engaged, and the engaging recess 68d of the large cleaning float member 68 is engaged. Is positioned above the engagement protrusion 62c of the main shaft member 62, and the two members 68d and 62c are not engaged.

つぎに、図２及び図６に示すように、排水弁装置２４の小洗浄モードにおける開弁時の状態では、使用者が操作レバー８４（図２参照）を所定の小洗浄モードを実行する方向に回動操作すると、ワイヤ巻取り装置８２が作動し、操作ワイヤ７８が大洗浄モードの場合の最大巻き取り量よりも少ない巻き取り量で巻き取られ、排水弁ユニット４０の主軸部材６２及び弁体保持部材６０がそれぞれの最高高さ位置よりも低い所定の高さ位置まで引き上げられ、排水口２０が開放される。このとき、弁座５０に対する弁体５２の上昇高さ（ストローク）Ｈが、大洗浄モードの最大ストロークＨ２よりも低いＨ１となり、洗浄水タンク装置１６の排水弁装置２４による水洗大便器１の便器本体２への小洗浄モードの排水が開始される。   Next, as shown in FIG. 2 and FIG. 6, when the drain valve device 24 is in the valve opening state in the small washing mode, the user operates the operation lever 84 (see FIG. 2) in the predetermined small washing mode. When the rotating operation is performed, the wire winding device 82 is activated, and the operation wire 78 is wound with a winding amount smaller than the maximum winding amount in the large cleaning mode, and the main shaft member 62 and the valve of the drain valve unit 40 are wound. The body holding member 60 is pulled up to a predetermined height position lower than each maximum height position, and the drain port 20 is opened. At this time, the rising height (stroke) H of the valve body 52 with respect to the valve seat 50 becomes H1 lower than the maximum stroke H2 in the large washing mode, and the toilet of the flush toilet 1 by the drain valve device 24 of the flush water tank device 16 Draining of the small cleaning mode to the main body 2 is started.

また、図６に示すように、排水弁装置２４の小洗浄モードにおける開弁時の状態では、外側制御筒部材７６の外側に貯水されている貯水タンク１８内の洗浄水と外側制御筒部材７６の内部の洗浄水が、外側制御筒部材７６のスリット穴７６ｂ及び排水口形成部材４２の連通口５８によって連通しているため、貯水タンク１８内の水位と外側制御筒部材７６の内部の水位が共に満水時の止水水位Ｗｆよりも低い水位Ｗ１となり、大洗浄用フロート部材６８及び小洗浄用フロート部材７０が水没している。
また、支持部材７４は小洗浄用フロート部材７０の浮力により上昇し、弁体５２と共に主軸部材６２とその係合突起６２ｂについてもストロークＨ１で上昇しているため、カム部材７２の係合凹部７２ｂが主軸部材６２の係合突起６２ｂと係合している状態となり、主軸部材６２及び弁体５２の下降動作（閉弁動作）が拘束された状態となる。
一方、大洗浄用フロート部材６８の係合凹部６８ｄは、主軸部材６２の係合突起６２ｃよりも上方に位置しており、両者６８ｄ，６２ｃが係合していない状態となる。 In addition, as shown in FIG. 6, in the state when the drain valve device 24 is opened in the small cleaning mode, the cleaning water in the water storage tank 18 stored outside the outer control cylinder member 76 and the outer control cylinder member 76 are stored. Since the cleaning water in the inside is communicated by the slit hole 76b of the outer control cylinder member 76 and the communication port 58 of the drain port forming member 42, the water level in the water storage tank 18 and the water level in the outer control cylinder member 76 are In both cases, the water level W1 is lower than the water stop level Wf when the water is full, and the large washing float member 68 and the small washing float member 70 are submerged.
Further, the support member 74 is lifted by the buoyancy of the small cleaning float member 70, and the main shaft member 62 and its engagement protrusion 62b are also lifted at the stroke H1 together with the valve body 52. Is engaged with the engagement protrusion 62b of the main shaft member 62, and the lowering operation (valve closing operation) of the main shaft member 62 and the valve body 52 is constrained.
On the other hand, the engaging recess 68d of the large cleaning float member 68 is positioned above the engaging protrusion 62c of the main shaft member 62, and the two members 68d and 62c are not engaged.

つぎに、図８に示すように、排水弁装置２４の小洗浄モードにおける排水途中の状態では、排水口２０から便器本体２への排水に伴って、貯水タンク１８内の水位と外側制御筒部材７６の内部の水位が、図６に示す水位Ｗ１よりも低い水位Ｗ３まで低下するため、この水位の低下に連動して小洗浄用フロート部材７０の浮力が減少し、小洗浄用フロート部材７０と支持部材７４が下降する。
また、支持部材７４が下降すると、これに連動してカム部材７２が、その係合凹部７２ｂと主軸部材６２の係合突起６２ｂとの係合を解除する方向（図８の上方）に向ってヒンジ部７２ａを中心に回動する。
さらに、カム部材７２の係合凹部７２ｂと主軸部材６２の係合突起６２ｂとの係合が解除されると、主軸部材６２及び弁体５２が水位の低下と共に下降し、排水弁装置２４の小洗浄モードにおける閉弁動作が開始される。このとき、大洗浄用フロート部材６８の係合凹部６８ｄは、主軸部材６２の係合突起６２ｃよりも上方に位置しており、両者６８ｄ，６２ｃが係合していない状態となるため、主軸部材６２及び弁体５２の下降による閉弁動作が妨げられることはない。 Next, as shown in FIG. 8, in the middle of drainage in the small washing mode of the drain valve device 24, the water level in the water storage tank 18 and the outer control cylinder member are accompanied by drainage from the drain port 20 to the toilet body 2. Since the water level inside 76 is lowered to a water level W3 lower than the water level W1 shown in FIG. 6, the buoyancy of the small washing float member 70 is reduced in conjunction with the lowering of the water level, and the small washing float member 70 and The support member 74 is lowered.
Further, when the support member 74 is lowered, the cam member 72 is interlocked with this and moves in a direction (upward in FIG. 8) in which the engagement recess 72b and the engagement protrusion 62b of the main shaft member 62 are disengaged. It rotates around the hinge part 72a.
Further, when the engagement between the engagement recess 72b of the cam member 72 and the engagement protrusion 62b of the main shaft member 62 is released, the main shaft member 62 and the valve body 52 are lowered as the water level decreases, and the drain valve device 24 is small. The valve closing operation in the cleaning mode is started. At this time, the engagement recess 68d of the large cleaning float member 68 is positioned above the engagement protrusion 62c of the main shaft member 62, and the two main portions 68d and 62c are not engaged with each other. The valve closing operation by the lowering of 62 and the valve body 52 is not hindered.

つぎに、図８において主軸部材６２及び弁体５２が水位の低下と共にさらに下降すると、図９に示すように、弁体５２が弁座５０に当接し、排水口２０が閉止され、排水弁装置２４の小洗浄モードにおける排水が終了する。
また、排水終了時の状態では、貯水タンク１８内の水位と外側制御筒部材７６の内部の水位が、図８に示す水位Ｗ３よりも低い水位Ｗ４まで低下し、死水水位（ＤＷＬ）となる。この小洗浄モード時の死水水位Ｗ４（ＤＷＬ）は、図２０に示す大洗浄モード時の死水水位Ｗ８（ＤＷＬ）よりも高くなる。 Next, when the main shaft member 62 and the valve body 52 are further lowered as the water level is lowered in FIG. 8, the valve body 52 comes into contact with the valve seat 50 and the drain port 20 is closed as shown in FIG. The drainage in the 24 small cleaning modes ends.
Moreover, in the state at the time of completion | finish of drainage, the water level in the water storage tank 18 and the water level in the outer side control cylinder member 76 fall to the water level W4 lower than the water level W3 shown in FIG. 8, and become a dead water level (DWL). The dead water level W4 (DWL) in the small washing mode is higher than the dead water level W8 (DWL) in the large washing mode shown in FIG.

つぎに、図１〜図５、図７及び図１０〜図２０により、本発明の一実施形態による排水弁装置を備えた洗浄水タンク装置により実行される大洗浄モードについて説明する。
まず、図５に示されるような大洗浄モードにおける排水が開始される前の状態の排水弁装置２４においては、上述した図５に示されている小洗浄モードの場合と同様であるため、説明は省略する。 Next, with reference to FIGS. 1 to 5, 7, and 10 to 20, the large cleaning mode executed by the cleaning water tank device including the drain valve device according to the embodiment of the present invention will be described.
First, the drain valve device 24 in a state before the drainage in the large washing mode as shown in FIG. 5 is the same as in the small washing mode shown in FIG. Is omitted.

つぎに、図７に示すように、排水弁装置２４の大洗浄モードにおける開弁時の状態では、使用者が操作レバー８４（図２参照）を所定の大洗浄モードを実行する方向に回動操作すると、ワイヤ巻取り装置８２が作動し、操作ワイヤ７８が所定の最大量の巻き取り量で巻き取られ、排水弁ユニット４０の主軸部材６２及び弁体保持部材６０がそれぞれの最高高さ位置まで引き上げられる。このとき、弁座５０に対する弁体５２の上昇高さ（ストローク）Ｈが小洗浄モード時の引き上げ高さＨ１よりも高い最大高さ（最大ストローク）Ｈ２となり（Ｈ２＞Ｈ１）、洗浄水タンク装置１６の排水弁装置２４による水洗大便器１の便器本体２への大洗浄モードの排水が開始される。   Next, as shown in FIG. 7, when the drain valve device 24 is opened in the large washing mode, the user rotates the operation lever 84 (see FIG. 2) in a direction to execute the predetermined large washing mode. When operated, the wire take-up device 82 is actuated, the operation wire 78 is taken up by a predetermined maximum take-up amount, and the main shaft member 62 and the valve body holding member 60 of the drain valve unit 40 are at their highest height positions. Is raised. At this time, the rising height (stroke) H of the valve body 52 with respect to the valve seat 50 becomes the maximum height (maximum stroke) H2 higher than the lifting height H1 in the small cleaning mode (H2> H1), and the cleaning water tank device The drainage in the large washing mode to the toilet body 2 of the flush toilet 1 by the 16 drain valve devices 24 is started.

また、図７に示すように、排水弁装置２４の大洗浄モードにおける開弁時の状態では、弁体５２が弁座５０に対して最大ストロークＨ２で上昇して排水口２０が開放されており、貯水タンク１８内の水位が満水時の止水水位Ｗｆよりも低い水位Ｗ２となり、外側制御筒部材７６の外側に貯水されている貯水タンク１８内の洗浄水と外側制御筒部材７６の内部の洗浄水が、外側制御筒部材７６のスリット穴７６ｂ及び排水口形成部材４２の連通口５８によって連通しているため、大洗浄用フロート部材６８は水没しているが、小洗浄用フロート部材７０とカム部材７２のそれぞれの上方部分は水位Ｗ２よりも上方に表出している。
また、弁体５２と共に主軸部材６２とその係合突起６２ｂについても最大ストロークＨ２で上昇しているため、カム部材７２の係合凹部７２ｂが主軸部材６２の係合突起６２ｂの下方に位置し、両者７２ｂ，６２ｂが係合していない状態となる。
一方、大洗浄用フロート部材６８の係合凹部６８ｄは、主軸部材６２の係合突起６２ｃと係合している状態となり、主軸部材６２及び弁体５２の下降動作（閉弁動作）が拘束された状態となる。 Further, as shown in FIG. 7, when the drain valve device 24 is opened in the large washing mode, the valve body 52 rises with respect to the valve seat 50 with the maximum stroke H2 and the drain port 20 is opened. The water level in the water storage tank 18 becomes a water level W2 lower than the water stop water level Wf when the water is full, and the cleaning water in the water storage tank 18 stored outside the outer control cylinder member 76 and the inside of the outer control cylinder member 76 are stored. Since the cleaning water communicates with the slit hole 76b of the outer control cylinder member 76 and the communication port 58 of the drain port forming member 42, the large cleaning float member 68 is submerged, but the small cleaning float member 70 and Each upper portion of the cam member 72 is exposed above the water level W2.
Further, since the main shaft member 62 and its engaging projection 62b as well as the valve body 52 are also raised at the maximum stroke H2, the engaging recess 72b of the cam member 72 is positioned below the engaging projection 62b of the main shaft member 62, Both 72b and 62b will be in the state which is not engaging.
On the other hand, the engagement recess 68d of the large cleaning float member 68 is engaged with the engagement protrusion 62c of the main shaft member 62, and the lowering operation (valve closing operation) of the main shaft member 62 and the valve body 52 is restricted. It becomes a state.

つぎに、図１３及び図１４に示すように、排水弁装置２４の大洗浄モードにおける排水途中の第１の状態では、排水口２０から便器本体２への排水に伴って、貯水タンク１８内の水位と外側制御筒部材７６の内部の水位が、図７に示す水位Ｗ２よりも低い水位Ｗ５まで低下し、この水位の低下に連動して小洗浄用フロート部材７０の浮力が減少し、小洗浄用フロート部材７０と支持部材７４が下降する。
また、支持部材７４が下降すると、これに連動してカム部材７２が、その係合凹部７２ｂと主軸部材６２の係合突起６２ｂとの係合を解除する方向（図１３及び図１４の上方）に向ってヒンジ部７２ａを中心に回動する。 Next, as shown in FIGS. 13 and 14, in the first state in the middle of draining in the large washing mode of the drain valve device 24, the water in the water storage tank 18 is drained from the drain port 20 to the toilet body 2. The water level and the water level inside the outer control cylinder member 76 are lowered to a water level W5 lower than the water level W2 shown in FIG. 7, and the buoyancy of the small washing float member 70 is reduced in conjunction with the lowering of the water level. The float member 70 and the support member 74 are lowered.
When the support member 74 is lowered, the cam member 72 is interlocked with the engagement member 72b to release the engagement between the engagement recess 72b and the engagement protrusion 62b of the main shaft member 62 (upper direction in FIGS. 13 and 14). It turns around the hinge part 72a toward the center.

一方、図１３及び図１４に示すように、大洗浄用フロート部材６８においては、水位Ｗ５が、貯水部８６内の大洗浄用フロート部材６８の自重Ｇと浮力Ｆとの釣り合い位置に相当する貯水部８６内の水位ｗｎよりも上方に位置しており、洗浄水による浮力Ｆが大洗浄用フロート部材６８の自重Ｇを上回り、大洗浄用フロート部材６８の係合凹部６８ｄが、主軸部材６２の係合突起６２ｃと係合している状態となり、主軸部材６２及び弁体５２の下降動作（閉弁動作）が拘束された状態となるため、排水弁装置２４の大洗浄モードにおける閉弁動作が開始されることはない。   On the other hand, as shown in FIGS. 13 and 14, in the large washing float member 68, the water level W <b> 5 corresponds to the balance position between the own weight G and the buoyancy F of the large washing float member 68 in the water reservoir 86. The buoyancy F due to the washing water exceeds the own weight G of the large washing float member 68, and the engagement recess 68 d of the large washing float member 68 is formed on the main shaft member 62. Since the engaging protrusion 62c is engaged and the lowering operation (valve closing operation) of the main shaft member 62 and the valve body 52 is restricted, the valve closing operation of the drain valve device 24 in the large washing mode is performed. Never be started.

つぎに、図１５及び図１６に示すように、排水弁装置２４の大洗浄モードにおける排水途中の第２の状態では、排水口２０から便器本体２への排水に伴って、貯水タンク１８内における外側制御筒部材７６の外部の水位が、図１３及び図１４に示す水位Ｗ５よりも低い水位Ｗ６まで低下する一方、内側制御筒部材６４の貯水部８６内の水位については、遮蔽部材６６の連通口６６ｃと重なる内側筒部材６４の流調調整用の開口６４ａの大きさ（連通面積Ｓ３）が排水口形成部材４２の連通口５８や排水口２０の大きさ（開口面積）よりも小さくなるため、内側制御筒部材６４の貯水部８６内の水位ｗ１の低下速度ｖ１が、貯水タンク１８内における外側制御筒部材７６の外部の水位Ｗ６の低下速度Ｖ１よりも遅くなる。
また、大洗浄用フロート部材６８においては、内側制御筒部材６４の貯水部８６内の水位ｗ１が、貯水部８６内の大洗浄用フロート部材６８の自重Ｇと浮力Ｆとの釣り合い位置に相当する貯水部８６内の水位ｗｎよりも上方に位置しており、洗浄水による浮力Ｆが大洗浄用フロート部材６８の自重Ｇを上回り、大洗浄用フロート部材６８の係合凹部６８ｄが、主軸部材６２の係合突起６２ｃと係合している状態となり、主軸部材６２及び弁体５２の下降動作（閉弁動作）が依然拘束された状態となる。 Next, as shown in FIGS. 15 and 16, in the second state during the drainage in the large washing mode of the drain valve device 24, the drainage from the drain port 20 to the toilet body 2 is accompanied by the drainage in the water storage tank 18. While the water level outside the outer control cylinder member 76 decreases to a water level W6 lower than the water level W5 shown in FIGS. 13 and 14, the water level in the water reservoir 86 of the inner control cylinder member 64 is communicated with the shielding member 66. Since the size (communication area S3) of the flow adjustment opening 64a of the inner cylindrical member 64 that overlaps the port 66c is smaller than the size (opening area) of the communication port 58 and the drain port 20 of the drain port forming member 42. The lowering speed v1 of the water level w1 in the water storage section 86 of the inner control cylinder member 64 becomes slower than the lowering speed V1 of the water level W6 outside the outer control cylinder member 76 in the water storage tank 18.
Further, in the large washing float member 68, the water level w <b> 1 in the water storage portion 86 of the inner control cylinder member 64 corresponds to a balance position between the own weight G and the buoyancy F of the large washing float member 68 in the water storage portion 86. It is located above the water level wn in the water storage part 86, the buoyancy F by the washing water exceeds the own weight G of the large washing float member 68, and the engaging recess 68d of the large washing float member 68 is the main shaft member 62. The engagement protrusion 62c is engaged, and the lowering operation (valve closing operation) of the main shaft member 62 and the valve body 52 is still restrained.

つぎに、図１７及び図１８に示すように、排水弁装置２４の大洗浄モードにおける排水途中の第３の状態では、排水口２０から便器本体２への排水に伴って、貯水タンク１８内における外側制御筒部材７６の外部の水位が、図１５及び図１６に示す水位Ｗ６よりも低い水位Ｗ７まで低下する一方、内側制御筒部材６４の貯水部８６内の水位が上方貯水領域Ａ１と下方貯水領域Ａ２との境界面Ｐ１を通過して大洗浄用フロート部材６８の自重Ｇと浮力Ｆとの釣り合い位置に相当する貯水部８６内の水位ｗｎに達するまでに、貯水部８６内の洗浄水の水位が下降して境界面Ｐ１を通過する前後で貯水部８６内の貯水量が急激に減少し、内側制御筒部材６４の貯水部８６の下方貯水領域Ａ２内の水位の低下速度ｖ２が、図１５及び図１６に示す内側制御筒部材６４の貯水部８６の上方貯水領域Ａ１内の水位ｗ１の低下速度ｖ１よりも早まる。   Next, as shown in FIGS. 17 and 18, in the third state in the middle of drainage in the large washing mode of the drain valve device 24, in the water storage tank 18 along with drainage from the drain port 20 to the toilet body 2. While the water level outside the outer control cylinder member 76 is lowered to a water level W7 lower than the water level W6 shown in FIGS. 15 and 16, the water level in the water storage section 86 of the inner control cylinder member 64 is the upper water storage area A1 and the lower water storage. The cleaning water in the water storage section 86 passes through the boundary surface P1 with the region A2 and reaches the water level wn in the water storage section 86 corresponding to the balance position between the weight G of the large cleaning float member 68 and the buoyancy F. Before and after the water level descends and passes through the boundary surface P1, the amount of water stored in the water storage section 86 decreases rapidly, and the rate of decrease v2 of the water level in the lower water storage area A2 of the water storage section 86 of the inner control cylinder member 64 is shown in FIG. 15 and inside shown in FIG. Earlier than the decrease velocity v1 water level w1 in the upper reservoir region A1 of the reservoir 86 of the control cylinder member 64.

また、図１７及び図１８に示すように、大洗浄用フロート部材６８においては、貯水部８６内の水位が、図１５及び図１６に示す内側制御筒部材６４の貯水部８６の上方貯水領域Ａ１内の水位ｗ１から低下し、貯水部８６内の大洗浄用フロート部材６８の自重Ｇと浮力Ｆとの釣り合い位置に相当する貯水部８６の下方貯水領域Ａ２の水位ｗｎに達すると、洗浄水による浮力Ｆが大洗浄用フロート部材６８の自重Ｇを下回り（Ｆ＜Ｇ）、大洗浄用フロート部材６８が、主軸部材６２の係合突起６２ｃとの係合を解除する方向（図１７及び図１８の下方）に回動し、大洗浄用フロート部材６８の係合凹部６８ｄと主軸部材６２の係合突起６２ｃとの係合が解除され、主軸部材６２及び弁体５２の下降動作（閉弁動作）が開始される。   Also, as shown in FIGS. 17 and 18, in the large cleaning float member 68, the water level in the water storage section 86 is higher than the upper water storage area A1 of the water storage section 86 of the inner control cylinder member 64 shown in FIGS. When the water level falls from the inner water level w1 and reaches the water level wn in the lower water storage region A2 of the water storage portion 86 corresponding to the balance position between the dead weight G of the large washing float member 68 and the buoyancy F in the water storage portion 86, The buoyancy F is below the dead weight G of the large cleaning float member 68 (F <G), and the large cleaning float member 68 releases the engagement with the engagement protrusion 62c of the main shaft member 62 (FIGS. 17 and 18). And the engagement recess 68d of the large cleaning float member 68 and the engagement protrusion 62c of the main shaft member 62 are released, and the main shaft member 62 and the valve body 52 are lowered (the valve closing operation). ) Is started.

さらに、図１７及び図１８に示すように、内側制御筒部材６４の貯水部８６の貯水領域Ａに貯水されている洗浄水は、内側制御筒部材６４の流量調整用の開口６４ａから、これと連通する遮蔽部材６６の連通口６６ｃを経て、外側制御筒部材７６の開口７６ｃから排水弁装置２４の外部の貯水タンク１８内へ流出する。
また、主軸部材６２及び弁体５２の下降動作（閉弁動作）が開始するタイミングを遅延させて、排水終了時の貯水タンク１８内の死水水位（ＤＷＬ）を低く設定し、大洗浄モード時に貯水タンク１８から便器本体２に供給される洗浄水の総量を多く設定したい場合には、遮蔽部材６６を周方向Ｒにずらし、内側制御筒部材６４の開口６４ａと遮蔽部材６６の連通口６６ｃとの連通面積Ｓ３を小さく設定し、外側制御筒部材７６の外部の水位の低下速度と内側制御筒部材６４の貯水部８６の貯水領域Ａの水位の低下速度との速度差を大きく設定する。
一方、排水終了時の貯水タンク１８内の死水水位（ＤＷＬ）を高く設定し、大洗浄モード時に貯水タンク１８から便器本体２に供給される洗浄水の総量を少なく設定したい場合には、遮蔽部材６６を周方向Ｌにずらし、内側制御筒部材６４の開口６４ａと遮蔽部材６６の連通口６６ｃとの連通面積Ｓ３を大きく設定し、外側制御筒部材７６の外部の水位の低下速度と内側制御筒部材６４の貯水部８６の貯水領域Ａの水位の低下速度との速度差を小さく設定する。 Further, as shown in FIGS. 17 and 18, the wash water stored in the water storage area A of the water storage portion 86 of the inner control cylinder member 64 flows from the opening 64 a for adjusting the flow rate of the inner control cylinder member 64. The water flows out from the opening 76c of the outer control cylinder member 76 into the water storage tank 18 outside the drain valve device 24 through the communication port 66c of the shielding member 66 that communicates.
Moreover, the timing at which the descending operation (valve closing operation) of the main shaft member 62 and the valve body 52 is started is delayed so that the dead water level (DWL) in the water storage tank 18 at the end of drainage is set low, and water is stored in the large washing mode. When it is desired to set a large total amount of washing water supplied from the tank 18 to the toilet body 2, the shielding member 66 is shifted in the circumferential direction R, and the opening 64 a of the inner control cylinder member 64 and the communication port 66 c of the shielding member 66 are connected. The communication area S3 is set small, and the speed difference between the water level lowering speed outside the outer control cylinder member 76 and the water level lowering speed in the water storage region A of the water storage section 86 of the inner control cylinder member 64 is set large.
On the other hand, when the dead water level (DWL) in the water storage tank 18 at the end of drainage is set high and it is desired to set the total amount of cleaning water supplied from the water storage tank 18 to the toilet body 2 in the large cleaning mode, the shielding member 66 is shifted in the circumferential direction L, the communication area S3 between the opening 64a of the inner control cylinder member 64 and the communication port 66c of the shielding member 66 is set large, and the lowering speed of the water level outside the outer control cylinder member 76 and the inner control cylinder The speed difference from the water level lowering speed of the water storage area A of the water storage section 86 of the member 64 is set small.

つぎに、図１９及び図２０に示すように、排水弁装置２４の大洗浄モードにおける排水終了時の状態では、内側制御筒部材６４の流量調整用の開口６４ａから貯水タンク１８内へ流出に伴って、内側制御筒部材６４の貯水部８６の下方貯水領域Ａ２内の水位が下降して大洗浄用フロート部材６８の浮力がなくなる。
また、貯水タンク１８内における外側制御筒部材７６の外部の水位は、図１７及び図１８に示す水位Ｗ７よりも低く且つ図９に示す小洗浄モード時の死水水位Ｗ４（ＤＷＬ）よりも低い水位Ｗ８まで低下し、この水位Ｗ８が死水水位（ＤＷＬ）となり、弁体５２が弁座５０に当接し、排水口２０が閉止される。 Next, as shown in FIGS. 19 and 20, in the state when drainage is completed in the large washing mode of the drain valve device 24, the drain valve device 24 flows into the water storage tank 18 from the flow adjustment opening 64 a of the inner control cylinder member 64. Thus, the water level in the lower water storage area A2 of the water storage section 86 of the inner control cylinder member 64 is lowered, and the buoyancy of the large cleaning float member 68 is lost.
Further, the water level outside the outer control cylinder member 76 in the water storage tank 18 is lower than the water level W7 shown in FIGS. 17 and 18 and lower than the dead water level W4 (DWL) in the small cleaning mode shown in FIG. The water level is lowered to W8, the water level W8 becomes the dead water level (DWL), the valve body 52 comes into contact with the valve seat 50, and the drain port 20 is closed.

上述した本発明の第１実施形態による排水弁装置２４によれば、内側制御筒部材６４の貯水部８６内の底面８８の一部を底上げするように形成された段部９０が内側制御筒部材６４の貯水部８６の貯水領域Ａを急激に減少させるための貯水領域減少手段として機能するため、弁体５２が排水口２０を開放した後、内側制御筒部材６４の貯水部８６内の水位ｗが下降し、内側制御筒部材６４の貯水部８６内の水位が、貯水部８６内の段部９０の底上げ面９０ｂと同一の平面である上方貯水領域Ａ１と下方貯水領域Ａ２との境界面Ｐ１を通過して大洗浄用フロート部材６８の自重Ｇと浮力Ｆとの釣り合い位置に相当する貯水部８６内の水位ｗｎに達するまでに、貯水部８６内の洗浄水の水位が下降して境界面Ｐ１を通過する前後で貯水部８６内の貯水量が急激に減少し、内側制御筒部材６４の貯水部８６の下方貯水領域Ａ２内の水位の低下速度ｖ２が、図１５及び図１６に示す内側制御筒部材６４の貯水部８６の上方貯水領域Ａ１内の水位ｗ１の低下速度ｖ１よりも早められる。したがって、洗浄水による浮力Ｆが大洗浄用フロート部材６８の自重Ｇを下回り、大洗浄用フロート部材６８が主軸部材６２の係合突起６２ｃとの係合を解除する方向（図１７及び図１８の下方）に滑らかに回動するため、大洗浄用フロート部材６８の係合凹部６８ｄと主軸部材６２の係合突起６２ｃとの係合を滑らかに解除することができ、主軸部材６２及び弁体５２の下降動作（閉弁動作）を滑らかに開始することができる。これらの結果、洗浄水タンク装置１６の貯水タンク１８の排水口２０から水洗大便器１の便器本体２に供給される洗浄水量の総量がばらつくことを防ぐことができる。   According to the drain valve device 24 according to the first embodiment of the present invention described above, the step portion 90 formed so as to raise a part of the bottom surface 88 in the water storage portion 86 of the inner control cylinder member 64 is the inner control cylinder member. In order to function as a water storage area reduction means for rapidly reducing the water storage area A of the 64 water storage sections 86, the water level w in the water storage section 86 of the inner control cylinder member 64 after the valve body 52 opens the drain port 20. , And the water level in the water storage section 86 of the inner control cylinder member 64 is the same plane as the raised surface 90b of the stepped section 90 in the water storage section 86, and the boundary surface P1 between the upper water storage area A1 and the lower water storage area A2 Until the water level wn in the water storage portion 86 corresponding to the balance position between the dead weight G and the buoyancy F of the large washing float member 68 passes through the boundary surface Before and after passing through P1, The amount of water suddenly decreases, and the water level lowering speed v2 in the lower water storage area A2 of the water storage section 86 of the inner control cylinder member 64 becomes the upper water storage area of the water storage section 86 of the inner control cylinder member 64 shown in FIGS. It is made faster than the decreasing speed v1 of the water level w1 in A1. Therefore, the buoyancy F due to the cleaning water is less than the own weight G of the large cleaning float member 68, and the large cleaning float member 68 releases the engagement with the engagement protrusion 62c of the main shaft member 62 (see FIGS. 17 and 18). Smoothly downward), the engagement between the engagement recess 68d of the large washing float member 68 and the engagement protrusion 62c of the main shaft member 62 can be smoothly released, and the main shaft member 62 and the valve body 52 can be released. Can be smoothly started. As a result, it is possible to prevent the total amount of washing water supplied from the drain port 20 of the water storage tank 18 of the washing water tank device 16 to the toilet body 2 of the flush toilet 1 from varying.

さらに、本実施形態による排水弁装置２４によれば、内側制御筒部材６４の貯水部８６に形成された流量調整用の開口６４ａが貯水部８６の側周壁部６４ｂの下方位置にほぼ周方向にスリット状に延びるように形成されているため、遮蔽部材６６の取付位置を変更して内側制御筒部材６４の流量調整用の開口６４ａと遮蔽部材６６の連通口６６ｃとの連通面積Ｓ３を調整する際に、遮蔽部材６６の連通口６６ｃを内側制御筒部材６４の流量調整用の開口６４ａに対して水平方向にずらすことにより、内側制御筒部材６４の流量調整用の開口６４ａから遮蔽部材６６の連通口６６ｃを通過するときの上下方向の水圧のばらつきの影響を抑えることができ、内側制御筒部材６４の流量調整用の開口６４ａから流出させる洗浄水量のばらつきを抑えることができる。これらの結果、洗浄水タンク装置１６の貯水タンク１８の排水口２０から水洗大便器１の便器本体２に供給される洗浄水量の総量がばらつくことを防ぐことができる。   Furthermore, according to the drain valve device 24 according to the present embodiment, the flow rate adjusting opening 64a formed in the water storage portion 86 of the inner control cylinder member 64 is substantially circumferentially positioned below the side peripheral wall portion 64b of the water storage portion 86. Since it is formed to extend in a slit shape, the attachment position of the shielding member 66 is changed to adjust the communication area S3 between the flow rate adjustment opening 64a of the inner control cylinder member 64 and the communication port 66c of the shielding member 66. At this time, the communication port 66c of the shielding member 66 is shifted in the horizontal direction with respect to the flow rate adjustment opening 64a of the inner control cylinder member 64, whereby the flow rate adjustment opening 64a of the inner control cylinder member 64 is removed from the shielding member 66. The influence of variation in the water pressure in the vertical direction when passing through the communication port 66c can be suppressed, and variation in the amount of cleaning water flowing out from the flow rate adjustment opening 64a of the inner control cylinder member 64 is suppressed. It is possible. As a result, it is possible to prevent the total amount of washing water supplied from the drain port 20 of the water storage tank 18 of the washing water tank device 16 to the toilet body 2 of the flush toilet 1 from varying.

１ 水洗大便器
２ 便器本体
４ ボウル部
６ トラップ管路
６ａ 排水トラップ管路の入口
８ リム
１０ 第１吐水口
１２ 溜水部
１４ 第２吐水口
１６ 洗浄水タンク装置
１８ 貯水タンク
１８ａ 貯水タンクの底面
２０ 排水口
２２ 給水装置
２４ 排水弁装置
２６ 給水管
２８ 給水バルブ
３０ フロート
３２ 吐水口
３４ リフィール管
３６ オーバーフロー管
３８ 排水口ユニット
４０ 排水弁ユニット
４２ 排水口形成部材
４４ シール部材
４６ 締結部材
４８ オーバーフロー管取付部
５０ 弁座
５２ 弁体
５４ 排水口形成部材の上端部
５６ 支柱部
５８ 連通口
６０ 弁体保持部材
６２ 主軸部材
６２ａ 主軸部材の上端部
６２ｂ 主軸部材の係合突起
６２ｃ 主軸部材の係合突起
６４ 内側制御筒部材
６４ａ 流量調整用の開口
６４ｂ 側周壁部
６４ｃ 主軸部材のガイド穴
６４ｄ 支持部材用取付穴
６４ｅ ヒンジ結合孔
６４ｆ 突起
６６ 遮蔽部材
６６ａ 壁部
６６ｂ 嵌合凹部
６６ｃ 連通口
６８ 大洗浄用フロート部材
６８ａ フロート本体部
６８ｂ アーム部
６８ｃ ヒンジ突起部
６８ｄ 係合凹部
７０ 小洗浄用フロート部材
７２ カム部材
７２ａ カム部材のヒンジ部
７２ｂ カム部材の係合凹部
７４ 支持部材
７６ 外側制御筒部材
７６ａ 外側制御筒部材の側周面
７６ｂ スリット穴
７６ｃ 開口
７８ 操作ワイヤ
８０ ガイド部材
８０ａ ガイド孔
８０ｂ 支持部材用取付穴
８２ ワイヤ巻取り装置
８４ 操作レバー
８６ 内側制御筒部材の貯水部
８８ 内側制御筒部材の貯水部の底面
９０ 内側制御筒部材の貯水部の段部（貯水領域減少手段）
９０ａ 内側制御筒部材の貯水部の内壁面
９０ｂ 内側制御筒部材の貯水部の底上げ面
９２ 内側制御筒部材の貯水部の内壁面
９４ 内側制御筒部材の貯水部の中央側内壁面
９６ 内側制御筒部材の貯水部の外側内壁面
９８ 内側制御筒部材の貯水部の中間内壁面
１００ 内側制御筒部材の貯水部の内側周壁面 DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 4 Bowl part 6 Trap line 6a Drain trap line inlet 8 Rim 10 First outlet 12 Reservoir part 14 Second outlet 16 Washing water tank device 18 Reservoir 18a Reservoir bottom DESCRIPTION OF SYMBOLS 20 Drain port 22 Water supply apparatus 24 Drain valve apparatus 26 Water supply pipe 28 Water supply valve 30 Float 32 Drain outlet 34 Refill pipe 36 Overflow pipe 38 Drain outlet unit 40 Drain valve unit 42 Drain outlet formation member 44 Seal member 46 Fastening member 48 Overflow pipe attachment Portion 50 Valve seat 52 Valve body 54 Upper end portion of drainage port forming member 56 Column portion 58 Communication port 60 Valve body holding member 62 Main shaft member 62a Main shaft member upper end portion 62b Main shaft member engagement protrusion 62c Main shaft member engagement protrusion 64 Inner control cylinder member 64a Flow rate adjustment opening 64b Side peripheral wall 6 c Guide hole of main shaft member 64d Mounting hole for support member 64e Hinge coupling hole 64f Protrusion 66 Shielding member 66a Wall portion 66b Fitting recess 66c Communication port 68 Float member for large cleaning 68a Float main body portion 68b Arm portion 68c Hinge protrusion portion 68d Engagement Joint recess 70 Small cleaning float member 72 Cam member 72a Cam member hinge 72b Cam member engagement recess 74 Support member 76 Outer control cylinder member 76a Outer control cylinder member side peripheral surface 76b Slit hole 76c Open 78 Operation wire 80 Guide member 80a Guide hole 80b Support member mounting hole 82 Wire winding device 84 Operation lever 86 Water storage part of inner control cylinder member 88 Bottom surface of water storage part of inner control cylinder member 90 Step part of water storage part of inner control cylinder member (water storage) Area reduction means)
90a Inner wall surface of the water storage section of the inner control cylinder member 90b Raised bottom surface of the water storage section of the inner control cylinder member 92 Inner wall surface of the water storage section of the inner control cylinder member 94 Central inner wall surface of the water storage section of the inner control cylinder member 96 Inner control cylinder Outer inner wall surface 98 of the water storage part of the member Intermediate inner wall surface 100 of the water storage part of the inner control cylinder member Inner peripheral wall surface of the water storage part of the inner control cylinder member

Claims (5)

便器を洗浄する洗浄水を貯える洗浄水タンクの排水弁装置であって、
洗浄水タンクの底面に配置された排水口を開閉する弁体と、
この弁体の動きを制御する制御筒であって、洗浄水を貯水する貯水領域を形成する貯水部を備え、この貯水部に貯水された洗浄水を所定の流量で上記洗浄水タンク内へ流出させる開口が形成された上記制御筒と、
上記弁体に係合可能に取り付けられて上記制御筒の貯水部内の水位の低下により上記弁体との係合が解除されると下降するように上記制御筒の貯水部内に設けられたフロートと、
上記弁体が上記排水口を開放した後、上記制御筒の貯水部内の水位が下降して上記フロートの自重と浮力との釣り合い位置を通過したとき、上記フロートが上記制御筒の貯水部内の水位と共に下降して上記フロートと上記弁体との係合が解除されて上記弁体の閉弁動作が開始されるように、上記貯水部内の貯水領域における上記釣り合い位置よりも上方の所定高さ位置から下方の貯水領域を急激に減少させる貯水領域減少手段と、
を有することを特徴とする排水弁装置。 A drain valve device for a washing water tank for storing washing water for washing a toilet,
A valve body for opening and closing a drain outlet disposed on the bottom surface of the washing water tank;
A control cylinder that controls the movement of the valve body, and includes a water storage section that forms a water storage area for storing cleaning water, and the cleaning water stored in the water storage section flows out into the cleaning water tank at a predetermined flow rate. The control cylinder in which the opening to be formed is formed;
A float provided in the water reservoir of the control cylinder so as to be lowered when the engagement with the valve body is released due to a drop in the water level in the water reservoir of the control cylinder. ,
After the valve body opens the drain, when the water level in the water storage part of the control cylinder descends and passes through the balance position between the weight and buoyancy of the float, the water level in the water storage part of the control cylinder A predetermined height position above the balance position in the water storage region in the water storage section so that the engagement between the float and the valve body is released and the valve body is closed. A storage area reduction means for rapidly reducing the storage area below the storage area;
A drain valve device characterized by comprising: 上記貯水領域減少手段は、上記制御筒の貯水部内の底部の一部を底上げするように形成された段部であり、この段部の上面は、上記貯水部の底上げ面を形成し、上記釣り合い位置よりも上方に位置している請求項１記載の排水弁装置。   The water storage area reducing means is a step portion formed so as to raise a part of a bottom portion in the water storage portion of the control cylinder, and an upper surface of the step portion forms a bottom raising surface of the water storage portion, and the balance The drain valve device according to claim 1, wherein the drain valve device is located above the position. 上記制御筒の貯水部に形成された開口は、上記貯水部の下方位置にほぼ水平方向にスリット状に延びるように形成され、更に、上記制御筒の開口の一部と連通する所定幅の連通口が形成され且つ上記制御筒の開口の外側に取り付けられる遮蔽部材を有し、この遮蔽部材は、上記制御筒への取付位置を変更することにより、上記制御筒の開口と上記連通口との連通面積を調整して上記制御筒の貯水部から上記洗浄水タンク内へ流出させる洗浄水量を調整可能である請求項１又は２に記載の排水弁装置。   The opening formed in the water storage part of the control cylinder is formed to extend in a slit shape in a substantially horizontal direction at a position below the water storage part, and further communicates with a predetermined width communicating with a part of the opening of the control cylinder. A shielding member formed on the outside of the opening of the control cylinder, and the shielding member is configured such that the opening of the control cylinder and the communication port are changed by changing a mounting position to the control cylinder. The drainage valve device according to claim 1 or 2, wherein the amount of washing water flowing out from the water storage section of the control cylinder into the washing water tank can be adjusted by adjusting the communication area. 請求項１乃至３の何れか１項に記載の排水弁装置を備えたことを特徴とする洗浄水タンク装置。   A flush water tank device comprising the drain valve device according to any one of claims 1 to 3. 上記請求項４記載の洗浄水タンク装置を備えたことを特徴とする水洗大便器。   A flush toilet comprising the flush water tank apparatus according to claim 4.
JP2011244460A 2011-11-08 2011-11-08 Drain valve device, wash water tank device equipped with this drain valve device, and flush toilet equipped with this wash water tank device Active JP5811342B2 (en)

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