Flush toilet apparatus

Abstract

The invention provides a flush toilet apparatus which can accurately set the opening time of each drain valve, thereby effectively performing cleaning with a small amount of cleaning water. The present invention is a flush toilet device (1) characterized by comprising: a flush toilet body (2); a cleaning water tank (4); a first drain valve (10) that opens and closes a first drain port (4b) provided in the wash water tank, thereby switching between stopping the discharge of wash water from the rim spout port (2d); a second drain valve (12) that opens and closes a second drain port (4c) provided in the wash water tank, thereby switching between stopping discharge of the wash water from the spray discharge port (2e); and a water pressure driving mechanism (16) for opening the first drain valve or the second drain valve by using the water supply pressure of the wash water supplied from the tap water pipe to the wash water tank.

Description

Technical Field

[0001] The present invention relates to a flush toilet device, in particular to a flush toilet device which is cleaned by washing water stored in a washing water tank. Background Art

[0002] In conventional tank-type flush toilets, a single drain valve is provided on the flush water tank, so that the flush water discharged from the flush water tank is branched toward the inner edge spout and the jet spout, and water is spouted from each spout. That is, the water conduit formed in the flush toilet body is branched in the middle, and the flush water is guided to the inner edge spout and the jet spout, respectively.

[0003] In addition, International Publication No. 2005 / 085538 (Patent Document 1) discloses a flush toilet. This flush toilet is a tank-type flush toilet, which includes a tank for storing cleaning water for rim water spouting and a tank for storing cleaning water for jet water spouting. In each cleaning water tank, a drain valve for rim water spouting and jet water spouting is provided, respectively, and water is spouted from the rim water spouting port and the jet water spouting port, respectively, by opening these drain valves.

[0004] On the other hand, a flush toilet is described in Japanese Patent Publication No. 2018-100575 (Patent Document 2). The flush toilet comprises: a toilet body; a water storage tank; a pressure pump that pressurizes the cleaning water stored in the water storage tank and sends it to the toilet body; and a water supply line switching valve that switches the supply destination of the cleaning water supplied from the tap water pipe. Moreover, in the flush toilet, the pressure pump and the water supply line switching valve are controlled, thereby performing different cleaning sequences when performing large cleaning and small cleaning. As a result, for large cleaning and small cleaning, at appropriate times, an appropriate amount of cleaning water can be ejected from each water spout of the toilet body, and effective toilet cleaning is achieved with a small amount of cleaning water.

[0005] Patent Literature Patent Document 1: International Publication No. 2005 / 085538 Patent Document 2: Japanese Patent Application Publication No. 2018-100575 Summary of the invention

[0006] However, in the conventional flush toilet device with a single drain valve, water is spouted from the inner rim spout and the jet spout almost simultaneously. Therefore, it is not necessarily said that the washing water is spouted from the appropriate spout at the appropriate time, and part of the washing water used in washing is not fully and effectively utilized. In other words, water is wasted due to the washing water that is not fully and effectively utilized in washing.

[0007] On the other hand, the flush toilet described in Patent Document 1 is provided with drain valves for rim water spouting and jet water spouting, respectively, so that water spouting can be started at different times from the rim water spouting port and the jet water spouting port. However, the flush toilet described in Patent Document 1 is structured so that each drain valve is pulled up by a bead chain connected to an operating lever, and therefore the timing of starting water spouting from each water spouting port cannot be freely set. Therefore, even in the flush toilet described in Patent Document 1, a sufficient effect of suppressing water waste cannot be obtained.

[0008] In addition, in the existing flush toilet device with a single drain valve, the discharge and stop of the cleaning water from the inner edge water spout and the jet water spout are controlled by the single drain valve, so the end time of the water spout from each water spout is not correctly set, and too much water is replenished after the waste is discharged from the bowl, and the excess cleaning water sometimes flows out from the curved pipe line, resulting in water waste.

[0009] On the other hand, the flush toilet described in Patent Document 1 is provided with drain valves for rim water spouting and jet water spouting, respectively, so that the spouting and stopping of water from the rim water spouting port and the jet water spouting port can be independently controlled. However, the flush toilet described in Patent Document 1 is structured to pull up each drain valve by a bead chain connected to an operating lever, so the timing of stopping the spouting of water from each spouting port cannot be freely set. Therefore, even in the flush toilet described in Patent Document 1, a sufficient effect of suppressing water waste cannot be obtained.

[0010] In addition, in the flush toilet described in Patent Document 2, a part of the washing water used for cleaning is discharged by the water supply pressure supplied from the water pipe, so when the flush toilet is installed in an area with low water supply pressure, for example, there is a possibility of a problem such as insufficient washing water or inability to perform sufficient washing. In addition, in the flush toilet described in Patent Document 1, in order to execute the washing sequence of large washing and small washing, it is necessary to control the pressure pump or the switching valve, so there is a problem that the washing device is complicated and the cost is increased.

[0011] Therefore, an object of the present invention is to provide a flush toilet device which accurately sets the opening timing of each drain valve, thereby enabling efficient flushing with less flushing water.

[0012] Another object of the present invention is to provide a flush toilet device that supplies the full amount of flushing water used for flushing from a flushing water tank and executes different flushing sequences in large flushing and small flushing, thereby enabling efficient toilet flushing.

[0013] In order to solve the above-mentioned problems, the present invention is a flush toilet device, which is cleaned by washing water stored in a washing water tank, and is characterized in that it comprises: a flush toilet body, which has a bowl and a drainage elbow pipe extending from the lower part of the bowl; a washing water tank, which is arranged at the rear part of the flush toilet body and stores washing water for washing the bowl of the flush toilet body; a first drain valve, which opens and closes a first drain port provided in the washing water tank, thereby switching the discharge and stop of washing water from an inner edge water spouting port provided at the upper edge of the bowl; a second drain valve, which opens and closes a second drain port provided in the washing water tank, thereby switching the discharge and stop of washing water from a jet water spouting port provided at the lower part of the bowl; and a hydraulic drive mechanism, which uses the water supply pressure of the washing water supplied from the tap water pipe to the washing water tank to open the first drain valve or the second drain valve.

[0014] According to the present invention thus constituted, the first drain valve switches the discharge and stop of the washing water from the inner rim water spouting port, and the second drain valve switches the discharge and stop of the washing water from the jet water spouting port, so that the timing of the inner rim water spouting and the jet water spouting can be freely and independently set, and the bowl of the flush toilet body can be effectively cleaned with less washing water. In addition, the first drain valve or the second drain valve is opened by the hydraulic drive mechanism using the water supply pressure of the washing water, so it is not necessary to pull up the drain valve by electrical power such as a motor, and the opening timing can be set without using a complicated mechanism for opening the drain valve.

[0015] The present invention preferably further comprises a delay mechanism, and when the bowl is washed, the delay mechanism delays the opening of one of the first drain valve and the second drain valve compared to the other.

[0016] In a conventional flush toilet device that performs water spouting from the rim spouting port and the jet spouting port by a single drain valve, water spouting from the rim spouting port and the jet spouting port is started at almost the same time, so that water spouting is sometimes performed at a timing that is not necessarily necessary, thereby wasting a portion of the washing water. According to the present invention constructed as described above, one of the first drain valve and the second drain valve is delayed in opening compared to the other by the delay mechanism, so that according to the structure of the flush toilet body, water spouting from the rim spouting port and the jet spouting port can be started at a necessary timing, and the bowl can be effectively cleaned while suppressing the amount of washing water.

[0017] In the present invention, it is preferable that the water pressure driving mechanism is configured to open the second drain valve.

[0018] According to the present invention thus constituted, the second drain valve is opened by the hydraulic drive mechanism, so the timing of starting water spouting from the jet water spouting port can be adjusted by adjusting the timing of supplying washing water to the hydraulic drive mechanism, and the timing of starting jet water spouting can be freely set.

[0019] In the present invention, it is preferred that the delay mechanism includes a ball cock that operates in conjunction with the water level in the flushing water tank, and when a float of the ball cock descends to a predetermined position, flushing water is supplied to the hydraulic drive mechanism.

[0020] According to the present invention thus constructed, when the float of the ball cock drops to a specified position, cleaning water is supplied to the hydraulic drive mechanism. Therefore, according to the water level in the cleaning water tank, cleaning water is supplied to the hydraulic drive mechanism at an appropriate time, and water spouting from the jet spouting port can be started.

[0021] The present invention is preferably as follows: the delay mechanism comprises: a ball cock with a float; a small water tank, which is arranged in the cleaning water tank in a manner to surround the float and has a discharge hole; and a check valve float, which is constructed to open the discharge hole of the small water tank when the water level in the cleaning water tank drops to a specified water level, and supply cleaning water to the water pressure drive mechanism if the water level in the small water tank drops to the specified water level.

[0022] According to the present invention thus constituted, the delay mechanism includes a small water tank and a check valve float, and when the water level in the small water tank drops to a predetermined water level, washing water is supplied to the hydraulic drive mechanism. Therefore, the timing of supplying washing water to the hydraulic drive mechanism can be freely set by the structure of the small water tank, etc., and water spouting can be started at a time suitable for washing.

[0023] The present invention is preferably as follows: the delay mechanism comprises: a first ball cock, which starts to supply water into the cleaning water tank when the water level in the cleaning water tank drops to a specified first water level; and a second ball cock, which starts to supply cleaning water to the water pressure driving mechanism when the water level in the cleaning water tank drops to a specified second water level lower than the first water level.

[0024] According to the present invention thus constituted, the first ball cock starts supplying water into the washing water tank at a first water level, and the second ball cock starts supplying washing water to the water pressure drive mechanism at a second water level lower than the first water level. Therefore, by setting the second ball cock, the timing of supplying washing water to the water pressure drive mechanism can be freely set, and water spouting can be started at a timing suitable for washing.

[0025] In the present invention, it is preferable that the flush water tank is provided with a partition wall that separates a first tank portion provided with the first drain port from a second tank portion provided with the second drain port.

[0026] When the first drain valve and the second drain valve are provided in a single flush water tank, even if they are opened at a predetermined time, the amount of flush water spouted from the inner edge spout and the jet spout in each flush toilet body of the combination will be uneven due to the uneven flow resistance of the flush water conduit provided in the flush toilet body. According to the present invention constructed as above, the first tank part provided with the first drain port and the second tank part provided with the second drain port are separated by a partition wall, so that the uneven amount of flush water spouted from each spout can be suppressed. As a result, the bowl can be properly cleaned while suppressing the amount of flush water, and the water level in the bowl after one cleaning is completed can be appropriately set.

[0027] In the present invention, it is preferred that the first drain valve is configured to be closed in conjunction with the drop in the water level in the first water tank portion, and the second drain valve is configured to be closed in conjunction with the drop in the water level in the second water tank portion, and the pressure loss of the rim water conduit connecting the first drain port and the rim water spouting port is set to be greater than the pressure loss of the jet water conduit connecting the second drain port and the jet water spouting port, thereby causing the water level in the second water tank portion to drop earlier than the water level in the first water tank portion, and causing the second drain valve to be closed earlier than the first drain valve.

[0028] According to the present invention thus constituted, the pressure loss of the rim water conduit is set to be greater than the pressure loss of the jet water conduit, so that the flow rate of the washing water per unit time flowing out of the first water tank portion is less than the flow rate of the washing water per unit time flowing out of the second water tank portion. As a result, the water level in the first water tank portion drops more slowly than the water level in the second water tank portion, and even after the water level in the second water tank portion drops and the second drain valve is closed, the washing water in the first water tank portion continues to be spouted out from the rim water spouting port. Thus, even after the spouting of water from the jet water spouting port ends, the spouting of water from the rim water spouting port continues, and the water level of the accumulated water in the bowl portion can be set to an appropriate water level by replenishment.

[0029] In the present invention, it is preferred that the first drain valve is configured to be closed in conjunction with the drop in the water level in the first water tank portion, and the second drain valve is configured to be closed in conjunction with the drop in the water level in the second water tank portion, so that the volume of the first water tank portion is formed to be larger than the volume of the second water tank portion, thereby causing the water level in the second water tank portion to drop earlier than the water level in the first water tank portion, and causing the second drain valve to be closed earlier than the first drain valve.

[0030] According to the present invention thus constituted, the volume of the first water tank portion is formed to be larger than that of the second water tank portion, so the water level in the first water tank portion drops more slowly than the water level in the second water tank portion. As a result, even after the water level in the second water tank portion drops and the second drain valve is closed, the cleaning water in the first water tank portion continues to be spouted out from the inner rim spouting port. Thus, even after the spouting of water from the jet spouting port ends, the spouting of water from the inner rim spouting port continues, and the water level of the accumulated water in the bowl portion can be set to an appropriate water level by replenishment.

[0031] In the present invention, preferably, a small hole is provided on the partition wall of the flush water tank so as to connect the first tank portion and the second tank portion at a predetermined water level.

[0032] According to the present invention thus constructed, a small hole is provided on the partition wall of the washing water tank, which connects the first water tank section and the second water tank section at a predetermined water level, so that when the water level in the second water tank section is higher than the water level in the first water tank section, the washing water flows from the second water tank section into the first water tank. As a result, the water level of the first water tank drops more slowly, and the time during which the first drain valve is opened can be extended. Therefore, the amount of washing water spouted from the inner edge spouting port can be increased, and even after the spouting from the jet spouting port ends, the spouting from the inner edge spouting port continues. Thus, the accumulated water level in the bowl section can be supplemented and set to an appropriate water level.

[0033] The present invention is preferably as follows, characterized in that it also has an operating unit that can selectively execute a large cleaning mode and a small cleaning mode in which the amount of cleaning water supplied to the basin is less than that in the large cleaning mode. When the large cleaning mode is executed, after the first drain valve is opened, the second drain valve is opened after a specified time has passed, thereby supplying cleaning water to the basin. When the small cleaning mode is executed, the first drain valve and the second drain valve are opened at the same time, or after the first drain valve is opened, the second drain valve is opened before a specified time has passed.

[0034] According to the present invention thus constituted, the first drain valve switches the discharge and stop of the washing water from the inner rim water spouting port, and the second drain valve switches the discharge and stop of the washing water from the jet water spouting port, so that all the washing water for washing is supplied from the washing water tank, and the timing of the inner rim water spouting and the jet water spouting can be freely and independently set. Thus, the bowl of the flush toilet body can be effectively washed by the washing water stored in the washing water tank. Here, the inner rim water spouting at the start of the toilet washing mainly has the function of flushing down the dirt attached to the dirt receiving surface of the bowl, and the jet water spouting mainly has the function of pressing the dirt and accumulated water in the bowl into the drainage elbow pipe. Therefore, in small washing where there is less dirt attached to the bowl, there is less need to perform the inner rim water spouting at the start of the toilet washing. According to the present invention constructed as above, when the large-washing mode is executed, the second drain valve is opened after a predetermined time has passed after the first drain valve is opened, thereby supplying wash water to the bowl, and when the small-washing mode is executed, the first drain valve and the second drain valve are opened at the same time, or the second drain valve is opened before a predetermined time has passed after the first drain valve is opened. Therefore, in the small-washing mode, the amount of inner rim water spouting before the start of jet water spouting, which is less necessary, can be reduced, and the amount of wash water can be suppressed while ensuring sufficient washing performance.

[0035] In the present invention, the operating unit is preferably configured to open the second drain valve after opening the first drain valve when the large-cleaning mode is executed, and to open the first drain valve and the second drain valve substantially simultaneously when the small-cleaning mode is executed.

[0036] According to the present invention thus constituted, when the small cleaning mode is executed, the first drain valve and the second drain valve are substantially opened at the same time, so that the inner edge water spouting amount before the start of jet water spouting can be extremely small, and the cleaning water amount can be greatly suppressed while ensuring sufficient cleaning performance.

[0037] In the present invention, it is preferable that the water pressure driving mechanism opens the second drain valve using the supply pressure of the flush water supplied from the water pipe to the flush water tank.

[0038] According to the present invention thus constituted, the second drain valve is opened by the hydraulic drive mechanism, so the drain valve is not pulled up by electrical power such as a motor, and in the large cleaning mode, after the inner rim water spouting starts, the jet water spouting can be started after a predetermined time has passed. Thus, the bowl can be cleaned effectively while the amount of cleaning water is suppressed.

[0039] The present invention is preferably as follows: there is also a ball cock, which has a float that moves in conjunction with the water level in the cleaning water tank. The ball cock is constructed so that when the float descends to a specified position, cleaning water is supplied to the water pressure drive mechanism. When a large cleaning mode is executed by an operating unit, the float descends along with the decrease in the water level in the cleaning water tank, thereby starting to supply cleaning water to the water pressure drive mechanism. When a small cleaning mode is executed, the float is forced to descend according to the operation of the operating unit, thereby starting to supply cleaning water to the water pressure drive mechanism.

[0040] According to the present invention thus constituted, when the large-washing mode is executed, the float descends as the water level in the washing water tank drops, thereby starting to supply washing water to the hydraulic drive mechanism, and thus starting to spray water after the water level in the washing water tank drops. On the other hand, when the small-washing mode is executed, the float is forced to descend and starts to supply washing water to the hydraulic drive mechanism, and thus starts to spray water without waiting for the water level in the washing water tank to drop. Thus, the washing sequence of the large-washing mode and the small-washing mode can be set without using electrical control.

[0041] The present invention is preferably as follows: there is also a ball cock, which has a float that moves in conjunction with the water level in the cleaning water tank. The ball cock is constructed so that when the float drops to a specified position, cleaning water is supplied to the water pressure drive mechanism. When the large cleaning mode is executed by the operating part, the float drops along with the drop in the water level in the cleaning water tank, thereby starting to supply cleaning water to the water pressure drive mechanism. When the small cleaning mode is executed, before the float drops to the specified position, the second drain valve is forcibly opened according to the operation of the operating part.

[0042] According to the present invention thus constituted, when the large-washing mode is executed, the float descends as the water level in the washing water tank descends, thereby starting to supply washing water to the hydraulic drive mechanism, and thus starting to spout water after the water level in the washing water tank descends. On the other hand, when the small-washing mode is executed, the second drain valve is forcibly opened according to the operation of the operating unit, thereby starting to spout water. Thus, the washing sequence of the large-washing mode and the small-washing mode can be set without using electrical control.

[0043] In the present invention, preferably, the operation portion includes a handle, and when the handle is rotated in a first direction, the large cleaning mode is executed, and when the handle is rotated in a second direction opposite to the first direction, the small cleaning mode is executed.

[0044] According to the present invention thus constituted, when the handle is turned in the first direction, the large cleaning mode is executed, and when the handle is turned in the second direction, the small cleaning mode is executed. Therefore, the execution of the large cleaning mode and the small cleaning mode can be controlled by a simple mechanism.

[0045] In the present invention, it is preferable that the operation portion includes a first button and a second button, and when the first button is pressed, the large cleaning mode is executed, and when the second button is pressed, the small cleaning mode is executed.

[0046] According to the present invention thus constituted, when the first button is pressed, the large cleaning mode is executed, and when the second button is pressed, the small cleaning mode is executed. Therefore, the execution of the large cleaning mode and the small cleaning mode can be controlled by a simple mechanism.

[0047] According to the flush toilet device of the present invention, by accurately setting the opening timing of each drain valve, it is possible to perform efficient cleaning with less cleaning water.

[0048] Furthermore, according to the flush toilet apparatus of the present invention, the full amount of flush water used for flushing is supplied from the flush water tank, and different flushing sequences are performed in large flushing and small flushing, thereby enabling efficient flushing of the toilet. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a block diagram showing the flush toilet device according to the first embodiment of the present invention. Figure 2 It is a cross-sectional view showing a schematic structure of a flush water tank provided in the flush toilet apparatus according to the first embodiment of the present invention. Figure 3 It is a cross-sectional view showing the structure of a ball cock built into a flush water tank in the flush toilet device according to the first embodiment of the present invention. Figure 4 It is a cross-sectional view showing the structure of a hydraulic drive mechanism built into a flush water tank in the flush toilet device according to the first embodiment of the present invention. Figure 5 This is a schematic diagram for explaining the operation of the flush toilet device according to the first embodiment of the present invention. Figure 6 This is a schematic diagram for explaining the operation of the flush toilet device according to the first embodiment of the present invention. Figure 7 This is a schematic diagram for explaining the operation of the flush toilet device according to the first embodiment of the present invention. Figure 8 This is a schematic diagram for explaining the operation of the flush toilet device according to the first embodiment of the present invention. Fig. 9 It is a timing chart showing the operation of the flush toilet device according to the first embodiment of the present invention. Fig.10It is a cross-sectional view showing a schematic structure of a flush water tank provided in a flush toilet apparatus according to a second embodiment of the present invention. Fig.11 This is a schematic diagram for explaining the operation of the flush water tank in the flush toilet device according to the second embodiment of the present invention. Fig.12 It is a timing chart showing the operation of the flush toilet device according to the second embodiment of the present invention. Fig.13 It is a cross-sectional view showing a schematic structure of a flush water tank provided in a flush toilet apparatus according to a third embodiment of the present invention. Fig.14 It is a timing chart showing the operation of the flush toilet device according to the third embodiment of the present invention. Fig.15 It is a block diagram showing a flush toilet device according to a fourth embodiment of the present invention. Fig.16 It is a cross-sectional view showing a schematic structure of a flush water tank provided in a flush toilet apparatus according to a fourth embodiment of the present invention. Fig.17 It is a cross-sectional view showing the structure of a ball cock built into a flush water tank in a flush toilet device according to a fourth embodiment of the present invention. Fig.18 It is a cross-sectional view showing the structure of a hydraulic drive mechanism built into a flush water tank in a flush toilet device according to a fourth embodiment of the present invention. Fig.19 This is a schematic diagram for explaining the operation of the flush toilet device according to the fourth embodiment of the present invention. Fig. 20 This is a schematic diagram for explaining the operation of the flush toilet device according to the fourth embodiment of the present invention. Fig.21 This is a schematic diagram for explaining the operation of the flush toilet device according to the fourth embodiment of the present invention. Fig. 22 This is a schematic diagram for explaining the operation of the flush toilet device according to the fourth embodiment of the present invention. Fig.23 This is a schematic diagram for explaining the operation of the flush toilet device according to the fourth embodiment of the present invention. Fig.24 It is a timing chart showing the operation of the flush toilet device according to the fourth embodiment of the present invention. Fig.25 It is a cross-sectional view showing a schematic structure of a flush water tank provided in a flush toilet apparatus according to a fifth embodiment of the present invention. Fig.26 It is a cross-sectional view showing a schematic structure of a flush water tank provided in a flush toilet apparatus according to a sixth embodiment of the present invention. Fig. 27 It is a block diagram showing a flush toilet device according to a seventh embodiment of the present invention. Fig.28 It is a cross-sectional view showing a schematic structure of a flush water tank provided in a flush toilet device according to a seventh embodiment of the present invention. Fig.29 This is a schematic diagram showing the schematic structure of an operating unit provided in a flush water tank of a flush toilet device according to a seventh embodiment of the present invention. Fig.30 It is a cross-sectional view showing the structure of a ball cock built into a flush water tank in a flush toilet device according to a seventh embodiment of the present invention. Fig.31 It is a cross-sectional view showing the structure of a hydraulic drive mechanism built into a flush water tank in a flush toilet device according to a seventh embodiment of the present invention. Fig.32 This is a schematic diagram for explaining the action when the large flushing mode is executed by the flush toilet device involved in the seventh embodiment of the present invention. Fig.33 This is a schematic diagram for explaining the action when the large flushing mode is executed by the flush toilet device involved in the seventh embodiment of the present invention. Fig.34 This is a schematic diagram for explaining the action when the large flushing mode is executed by the flush toilet device involved in the seventh embodiment of the present invention. Fig.35 This is a schematic diagram for explaining the action when the large flushing mode is executed by the flush toilet device involved in the seventh embodiment of the present invention. Fig.36 It is a timing chart showing the action when the large flushing mode is executed by the flush toilet device involved in the seventh embodiment of the present invention. Fig.37 This is a schematic diagram for explaining the effect when the small flush mode is executed by the flush toilet device involved in the seventh embodiment of the present invention. Fig.38 This is a schematic diagram for explaining the effect when the small flush mode is executed by the flush toilet device involved in the seventh embodiment of the present invention. Fig.39 This is a schematic diagram for explaining the effect when the small flush mode is executed by the flush toilet device involved in the seventh embodiment of the present invention. Fig.40 It is a timing chart showing the action when the small flush mode is executed by the flush toilet device involved in the seventh embodiment of the present invention. Fig.41 It is a cross-sectional view showing a schematic structure of a flush water tank provided in a flush toilet device according to an eighth embodiment of the present invention. Fig.42 This is a schematic diagram showing the schematic structure of an operating unit provided in a flush water tank of a flush toilet device according to an eighth embodiment of the present invention. Explanation of symbols 1- flush toilet device; 2- flush toilet body; 2a- bowl; 2c- drain elbow pipeline; 2d- inner edge water outlet; 2e- jet water outlet; 2f- inner edge water conduit; 2g- jet water conduit; 4- cleaning water tank; 4a- lever handle; 4b- first drain outlet; 4c- second drain outlet; 6- water supply source; 8- stopcock; 10- first drain valve; 10a- bead chain; 10b- float; 12- second drain valve; 12a- valve shaft; 12b- float; 14- ball cock (delay mechanism); 14a- inflow pipe; 14b- outflow pipe; 16- hydraulic drive mechanism; 16a- cylinder body; 16b- piston; 16c- spring; 18- main body; 18a- pressure chamber; 20- main valve body; 20 a-discharge hole; 22-valve seat; 24-float; 26-arm; 26a-support shaft; 28-pilot valve; 28a-pilot valve port; 30-rod; 32-clutch mechanism; 34-water supply pipe; 40-small water tank; 40a-discharge hole; 42-check valve float; 50-first ball cock; 52-second ball cock; 56-float; 58-water supply port; 101-flush toilet device; 102-flush toilet body; 102a-bowl; 102c-drainage elbow pipeline; 102d-inner edge water outlet; 102e-jet water outlet; 102f-inner edge water conduit; 102g-jet water conduit; 104-wash water tank; 104a-lever handle; 104b-first drain port; 104c- 2nd drain port; 105-partition wall; 105a-1st water tank section; 105b-2nd water tank section; 105c-small hole; 106-water supply source; 108-stopcock; 110-1st drain valve; 110a-bead chain; 110b-float; 112-2nd drain valve; 112a-valve shaft; 112b-float; 114-ball cock (delay mechanism); 114a-inflow pipe; 114b-outflow pipe; 116-hydraulic drive mechanism; 116a-cylinder; 116b-piston; 116c-spring; 118-body; 118a-pressure chamber; 120-main valve body; 120a-discharge hole; 122-valve seat; 124-float; 126-arm; 126a-support shaft; 128-pilot valve ;128a-pilot valve port;130-rod;132-clutch mechanism;134-water supply pipe;140a-first drain port;140b-second drain port;142-second drain valve;142a-valve shaft;142b-float;150-partition wall;150a-first water tank section;150b-second water tank section;150c-small hole;152-second drain valve;201-flush toilet device;202-flush toilet body;202a-bowl section;202c-drainage elbow pipeline;202d-inner edge water outlet;202e-jet water outlet;202f-inner edge water conduit;202g-jet water conduit;204-wash water tank;204b-first drain port;204c-second drain port;205-operating part; 205a-lever handle (handle); 205b-shaft; 205c-first arm; 205d-second arm; 205e-bead chain for large cleaning; 205f-bead chain for small cleaning; 205g-protrusion; 206-partition wall; 206a-first water tank; 206b-second water tank; 207-water supply source; 208-water stopper; 210-first drain valve; 210a-bead chain; 210b-float; 212-second drain valve; 212a-valve shaft; 212b-float; 214-ball cock (delay mechanism); 214a-inflow pipe; 214b-outflow pipe; 216-hydraulic drive mechanism; 21 6a-cylinder; 216b-piston; 216c-spring; 218-body; 218a-pressure chamber; 220-main valve body; 220a-discharge hole; 222-valve seat; 224-float; 226-arm; 226a-support shaft; 228-pilot valve; 228a-pilot valve port; 230-rod; 232-clutch mechanism; 234-water supply pipe; 240-operating part; 240a-large cleaning bead chain; 240b-small cleaning bead chain; 240c-small cleaning bead chain; 242a-first button; 242b-second button; 244-lever; 246-shaft; 248a-first arm; 248b-second arm. ; DETAILED DESCRIPTION

[0050] Next, a flush toilet device according to a first embodiment of the present invention will be described with reference to the drawings. Figure 1 It is a block diagram showing the flush toilet device according to the first embodiment of the present invention. Figure 2 It is a cross-sectional view showing a schematic structure of a flush water tank provided in the flush toilet apparatus according to the first embodiment of the present invention. Figure 3 It is a cross-sectional view showing the structure of a ball cock built into a flush water tank in the flush toilet device according to the first embodiment of the present invention. Figure 4 It is a cross-sectional view showing the structure of a hydraulic drive mechanism built into a flush water tank in the flush toilet device according to the first embodiment of the present invention.

[0051] like Figure 1 As shown, the flush toilet device 1 according to the embodiment of the present invention is composed of a flush toilet, that is, a flush toilet body 2 and a flush water tank 4 arranged at the rear of the flush toilet body 2. The flush toilet device 1 of this embodiment is configured so that after use, a lever handle 4a provided in the flush water tank 4 is operated to perform flushing. In addition, as a modified example, the present invention can also be configured so that flushing is performed based on a control signal from a remote control device (not shown) or a detection signal from a human body sensing sensor (not shown).

[0052] The flush toilet body 2 includes a bowl 2a and a drain bend pipe 2c extending from the lower part of the bowl 2a. In addition, an inner edge spout 2d is provided at the upper edge of the bowl 2a, and a jet spout 2e is provided at the lower part of the bowl 2a. When the toilet is cleaned, the inner edge spout 2d and the jet spout 2e are respectively spouted at a predetermined time, and the waste receiving surface of the bowl 2a is cleaned, and at the same time, the waste and the wash water in the bowl 2a are discharged to the drain bend pipe 2c. The waste and the wash water discharged to the drain bend pipe 2c are discharged to the sewer pipe (not shown) through the drain pipe seat (not shown).

[0053] Wash water is supplied to the wash water tank 4 from a water supply source 6 such as a water pipe via a stopcock 8, and the supplied wash water is stored in the wash water tank 4 to a predetermined water level. The stopcock 8 is provided to stop the supply of wash water to the wash water tank 4 when maintenance is performed, and is usually in an "open" state. In addition, the wash water tank 4 has a first drain valve 10 and a second drain valve 12 built therein, and is configured to open and close the first drain port 4b and the second drain port 4c provided at the bottom of the wash water tank 4, respectively.

[0054] The washing water flowing out of the first drain port 4b flows through the rim conduit 2f formed inside the flush toilet body 2 and then is discharged from the rim spouting port 2d. Thus, the first drain valve 10 opens and closes the first drain port 4b provided in the flush water tank 4, thereby switching the discharge and stop of the washing water from the rim spouting port 2d. In addition, the washing water flowing out of the second drain port 4c flows through the jet conduit 2g formed inside the flush toilet body 2 and then is discharged from the jet spouting port 2e. Thus, the second drain valve 12 opens and closes the second drain port 4c provided in the flush water tank 4, thereby switching the discharge and stop of the washing water from the jet spouting port 2e.

[0055] Next, refer to Figure 2 The internal structure of the flush water tank 4 will be described. like Figure 2 As shown, the flushing water tank 4 includes: a first drain valve 10 for opening and closing the first drain port 4b; a second drain valve 12 for opening and closing the second drain port 4c; a ball cock 14 as a delay mechanism; and a hydraulic drive mechanism 16.

[0056] The flush water tank 4 is a tank configured to store flush water to be supplied to the flush toilet body 2, and has a first drain port 4b and a second drain port 4c formed at its bottom for discharging flush water to the flush toilet body 2.

[0057] The first drain valve 10 is a valve body configured to open and close the first drain port 4b. When the first drain valve 10 is pulled upward, the first drain port 4b is opened. As a result, the flush water in the flush water tank 4 is discharged to the inner edge water conduit 2f ( Figure 1 ) and is ejected from the inner edge water outlet 2d.

[0058] In this embodiment, the user rotates the lever handle 4a provided on the flush water tank 4, thereby pulling the bead chain 10a ( Figure 2 In addition, in the present embodiment, the first drain valve 10 is a valve body having a float 10b, which is configured to be opened by being pulled up from the first drain port 4b, and then slowly dropped as the water level in the washing water tank 4 drops, and is closed when it drops to a predetermined water level.

[0059] The second drain valve 12 is a valve body configured to open and close the second drain port 4c. By pulling the second drain valve 12 upward, the second drain port 4c is opened. As a result, the flush water in the flush water tank 4 is discharged to the jet water conduit 2g ( Figure 1 ) and is ejected from the jet water outlet 2e.

[0060] In this embodiment, the second drain valve 12 is configured to be pulled up from the second drain port 4c by the hydraulic drive mechanism 16. The second drain valve 12 is a valve body having a valve shaft 12a and a float 12b extending upward, and the valve shaft 12a is pulled up by the hydraulic drive mechanism 16. Thereafter, when it is pulled up to a predetermined height, it is separated from the hydraulic drive mechanism 16, and slowly descends as the water level in the washing water tank 4 drops, thereby closing the second drain port 4c.

[0061] In addition, in this embodiment, the float 12b of the second drain valve 12 is installed at a higher position than the float 10b of the first drain valve 10, so when the water level in the washing water tank 4 is relatively high, it is located at the second drain port 4c and closed. That is, when the first drain valve 10 and the second drain valve 12 are lowered along with the water level in the washing water tank 4, the second drain valve 12 is located at the second drain port 4c earlier and closed.

[0062] The delay mechanism, namely the ball cock 14 , is configured so that the washing water supplied from the water supply source 6 flows in after passing through the inflow pipe 14 a . In the present embodiment, due to the action of the ball cock 14 , the second drain valve 12 opens later than the first drain valve 10 .

[0063] Next, refer to Figure 3 The structure of the ball cock 14 will be described. like Figure 3As shown in FIG. 1 , the ball cock 14 includes a body 18 connected to an inflow pipe 14a and an outflow pipe 14b, a main valve body 20 disposed in the body 18, a valve seat 22 held in place by the main valve body 20, an arm 26 rotated by a float 24, and a pilot valve 28 moved by the rotation of the arm 26. That is, the ball cock 14 includes a float 24 that operates in conjunction with the water level in the washing water tank 4, and is configured to supply washing water to the hydraulic drive mechanism 16 when the float 24 drops to a predetermined position.

[0064] The main body 18 is a member having a connection portion of the inflow pipe 14a at the bottom and a connection portion of the outflow pipe 14b at one side. In addition, a valve seat 22 is formed inside the main body 18, and the valve seat 22 is connected to the outflow pipe 14b connected to the connection portion. In addition, a main valve body 20 is arranged inside the main body 18 to open and close the valve seat 22, so that when the valve seat 22 is opened, the tap water flowing in from the inflow pipe 14a flows through the valve seat 22 and then flows out to the outflow pipe 14b. In addition, the outflow pipe 14b is connected to the water pressure drive mechanism 16.

[0065] The main valve body 20 is a diaphragm valve body in a substantially disk-shaped manner, and is installed in the main body 18 in a manner that it can be seated and separated from the valve seat 22. In addition, a drain hole 20a is provided on the peripheral edge of the main valve body 20. In addition, in the main body 18, on the opposite side of the valve seat 22 ( Figure 3 In other words, the pressure chamber 18a is defined by the inner wall surface of the main body 18 and the main valve body 20. If the pressure in the pressure chamber 18a increases, the main valve body 20 is pushed against the valve seat 22 by the pressure and is seated on the valve seat 22.

[0066] A pressure passage 18b extends upwardly in communication with the pressure chamber 18a provided in the main body 18, and a pilot valve port 28a is provided at the upper end of the pressure passage 18b. The pilot valve port 28a opens upward and is opened and closed by the pilot valve 28.

[0067] On the other hand, the float 24 is supported by the arm 26, and the arm 26 is rotatably supported by the support shaft 26a. In addition, the pilot valve 28 is connected to the arm 26, and is configured so that the pilot valve 28 moves in the vertical direction along with the rotation of the arm 26. As a result, when the water level in the washing water tank 4 rises to a predetermined set water level L 1In the above state, the float 24 is lifted upward, and the pilot valve 28 moves downward and seats at the pilot valve port 28a, thereby closing it. On the other hand, when the washing water in the washing water tank 4 is discharged and the water level in the washing water tank 4 drops, the float 24 drops downward, the pilot valve 28 moves upward, and the pilot valve port 28a is opened. Therefore, when the water level in the washing water tank 4 is higher than the set water level L 1 When the toilet is on standby for cleaning, the pilot valve port 28a of the main body 18 is in a closed state.

[0068] In addition, the tap water flowing into the main body 18 from the inlet pipe 14a flows into the annular space around the valve seat 22, and from there flows into the pressure chamber 18a after passing through the discharge hole 20a of the main valve body 20. Here, in the state where the pilot valve port 28a is closed by the pilot valve 28, there is no outflow path for the tap water flowing into the pressure chamber 18a from the discharge hole 20a, and the pressure in the pressure chamber 18a increases. In this way, when the pressure in the pressure chamber 18a increases, the main valve body 20 is pressed against the valve seat 22 (towards the valve seat 22) due to the pressure. Figure 3 The valve seat 22 is closed by the main valve body 20.

[0069] On the other hand, when the first drain valve 10 is opened due to the washing operation and the water level in the washing water tank 4 is lower than the set water level L 1 When the float 24 moves downward, the pilot valve 28 moves upward, and the pilot valve port 28a is opened. When the pilot valve port 28a is opened, the water in the pressure chamber 18a flows out from the pilot valve port 28a, and the pressure in the pressure chamber 18a decreases. As a result, the main valve body 20 (toward the valve seat 22) is pulled away from the valve seat 22. Figure 3 The left side in the middle) moves, and the valve seat 22 is opened. In this way, when the pilot valve port 28a is opened, the pressure in the pressure chamber 18a does not rise, so the valve seat 22 is in the opened state.

[0070] Next, refer to Figure 4 The structure of the water pressure drive mechanism 16 will be described. The hydraulic drive mechanism 16 is configured to drive the second drain valve 12 using the water supply pressure of the flush water supplied from the water pipe to the flush water tank. Specifically, the hydraulic drive mechanism 16 includes a cylinder 16a into which water supplied from the ball cock 14 flows; a piston 16b slidably disposed in the cylinder 16a; and a rod 30 protruding from the lower end of the cylinder 16a to drive the second drain valve 12. In addition, a spring 16c is disposed inside the cylinder 16a to apply force to the piston 16b downward, and a seal is installed on the piston 16b to ensure water tightness between the inner wall surface of the cylinder 16a and the piston 16b. In addition, a clutch mechanism 32 is provided at the lower end of the rod 30, and the rod 30 is connected / disconnected with the valve shaft 12a of the second drain valve 12 by the clutch mechanism 32.

[0071] The cylinder 16a is a cylindrical member, and is arranged with its axis oriented in the vertical direction, and the piston 16b is slidably received therein. In addition, an outflow pipe 14b extending from the ball cock 14 is connected to the lower end of the cylinder 16a, and the cleaning water flowing out of the ball cock 14 flows into the cylinder 16a. Therefore, the piston 16b in the cylinder 16a is lifted against the force of the spring 16c by the water flowing into the cylinder 16a.

[0072] On the other hand, an outflow hole is provided at the upper end of the cylinder 16a, and the water supply pipe 34 is connected to the inside of the cylinder 16a through the outflow hole. Therefore, when water flows into the cylinder 16a from the outflow pipe 14b connected to the lower part of the cylinder 16a, the piston 14b is lifted upward from the lower part of the cylinder 16a. Thereafter, when the piston 16b is lifted to a position closer to the upper side than the outflow hole, the water that has flowed into the cylinder 16a flows out from the outflow hole to the water supply pipe 34. In addition, the washing water that has flowed into the water supply pipe 34 falls into the washing water tank 4, and the washing water is supplied to the washing water tank 4.

[0073] The rod 30 is a rod-shaped member connected to the bottom of the piston 16b, and extends from the cylinder 16a through a through hole formed on the bottom surface of the cylinder 16a so as to protrude downward. In addition, the valve shaft 12a of the second drain valve 12 is connected to the lower end of the rod 30 via a clutch mechanism 32, and the rod 30 connects the piston 16b and the second drain valve 12. Therefore, when water flows into the cylinder 16a and the piston 16b is lifted, the rod 30 connected to the piston 16b lifts the second drain valve 12 upward, and the second drain valve 12 is opened.

[0074] In addition, a gap is provided between the rod 30 protruding from the bottom of the cylinder 16a and the inner wall of the through hole of the cylinder 16a, and part of the water flowing into the cylinder 16a flows out from the gap. The water flowing out from the gap flows into the washing water tank 4. Moreover, since the gap is relatively narrow and the flow path resistance is large, even in a state where water flows out from the gap, the pressure in the cylinder 16a rises due to the water flowing into the cylinder 16a from the outflow pipe 14b, and the piston 16b is lifted against the force of the spring 16c.

[0075] The clutch mechanism 32 detachably connects the rod 30 and the second drain valve 12. The clutch mechanism 32 is configured to separate the valve shaft 12a of the second drain valve 12 from the rod 30 when the second drain valve 12 is lifted by a predetermined distance together with the rod 30. In the state where the clutch mechanism 32 is separated, the second drain valve 12 is not linked to the movement of the piston 16b and the upper part of the rod 30, and the second drain valve 12 is lowered as the water level in the washing water tank 4 drops.

[0076] Next, refer to Figures 5 to 9 The operation of the flush toilet device 1 according to the first embodiment of the present invention will be described. Figures 5 to 8 This is a schematic diagram for explaining the operation of the flush toilet device 1 according to the first embodiment of the present invention. Fig. 9 It is a timing chart showing the operation of the flush toilet device 1 according to the first embodiment of the present invention.

[0077] First, as mentioned above, in the toilet cleaning standby state, if Figure 2 As shown, the first drain port 4b and the second drain port 4c of the washing water tank 4 are closed by the first drain valve 10 and the second drain valve 12, respectively. 2 Higher than the specified set water level L 1 (About the initial water level L 2 Higher than the set water level L 1 The reason will be described later). As a result, the body 18 ( Figure 3 )'s pilot valve port 28a is in a closed state, and the valve seat 22 is closed by the main valve body 20.

[0078] Next, in Fig. 9 At time t1, when the user rotates the lever handle 4a of the flushing water tank 4 to clean the toilet, the bead chain 10a connected thereto pulls up the first drain valve 10. Figure 5As shown, the first drain valve 10 is pulled away from the first drain port 4b, and the first drain port 4b is opened. If the first drain port 4b is opened, the washing water stored in the washing water tank 4 flows from the first drain port 4b into the inner edge water conduit 2f ( Figure 1 ) and spit out from the inner edge spouting port 2d. By the inner edge spouting water from the inner edge spouting port 2d, a swirling flow is formed on the waste receiving surface of the bowl portion 2a, and the waste receiving surface is cleaned.

[0079] The washing water is discharged from the first drain port 4b, whereby the water level in the washing water tank 4 drops. Fig. 9 At time t2, when the water level in the cleaning water tank 4 is lower than the set water level L 1 When the float 24 of the ball cock 14 drops, the pilot valve 28 ( Figure 3 As a result, the pressure in the pressure chamber 18a decreases and the main valve body 20 is opened. Figure 6 As shown, water supply to the water pressure drive mechanism 16 begins.

[0080] When washing water is supplied to the hydraulic drive mechanism 16, it flows into the cylinder 16a ( Figure 4 ) against the force of the spring 16c to lift the piston 16b. As a result, the rod 30 connected to the piston 16b pulls up the valve shaft 12a of the second drain valve 12, and the second drain port 4c is opened. That is, the second drain valve 12 is driven and opened by the water supply pressure of the tap water supplied by the ball cock 14.

[0081] When the second drain port 4c is opened, the washing water stored in the washing water tank 4 flows from the second drain port 4c into the jet water conduit 2g ( Figure 1 ) and is ejected from the jet water spouting port 2e. The jet water spouting from the jet water spouting port 2e fills the drain bend pipe 2c with water, inducing a siphon effect. The accumulated water and dirt in the bowl 2a are attracted to the drain bend pipe 2c by the siphon effect, and are discharged to the sewer pipe (not shown).

[0082] When the second drain valve 12 is pulled up to a predetermined height together with the piston 16b of the hydraulic drive mechanism 16, the clutch mechanism 32 ( Figure 4 ) separates the valve shaft 12a of the second drain valve 12 from the rod 30. As a result, the second drain valve 12 descends toward the second drain port 4c. Fig. 9 At time t3, Figure 7 As shown in FIG. 1 , the second drain valve 12 is located at the second drain port 4c, and the second drain port 4c is closed. As a result, the jet water spouting from the jet water spouting port 2e is stopped. Furthermore, as described above, since the float 12b of the second drain valve 12 is installed at a higher position, the second drain valve 12 is located at the second drain port 4c earlier than the first drain valve 10.

[0083] exist Figure 7 In the state shown, the main valve body 20 of the ball cock 14 is in an open state, so the cleaning water supplied from the water supply source 6 (tap water pipe) is supplied to the hydraulic drive mechanism 16 through the ball cock 14, and flows into the cleaning water tank 4 from the water supply pipe 34 connected to the cylinder 16a. On the other hand, the first drain valve 10 is still in an open state, so the cleaning water in the cleaning water tank 4 flows out from the first drain port 4b and is discharged from the inner edge water outlet 2d. Fig. 9 At time t3, after the jet water spouting is stopped, the washing water spouted from the rim water spouting port 2d is used as supplementary water for returning the water level in the bowl portion 2a to the accumulated water level in the standby state.

[0084] Here, the flow rate of the washing water flowing out of the first drain port 4b is greater than the flow rate of the washing water flowing into the washing water tank 4 from the water supply pipe 34. Figure 7 In the state shown, the water level in the washing water tank 4 drops, and the first drain valve 10 also drops accordingly. Fig. 9 At time t4, when the water level in the washing water tank 4 drops to the dead water level DWL, Figure 8 As shown, the first drain valve 10 is located at the first drain port 4b and is closed. As a result, the rim water spouting from the rim water spouting port 2d is stopped.

[0085] Furthermore, even after the first drain valve 10 is closed, the main valve body 20 of the ball cock 14 remains in the open state, so the washing water supplied from the water supply source 6 (tap water pipe) flows from the water supply pipe 34 into the washing water tank 4 via the ball cock 14 and the hydraulic drive mechanism 16. As a result, the water level in the washing water tank 4 rises. Fig. 9 At time t5, when the water level in the cleaning water tank 4 rises to the set water level L 1 When the float 24 of the ball cock 14 rises, the pilot valve 28 ( Figure 3 ) is closed.

[0086] In this way, when the pilot valve 28 is closed, the cleaning water flowing into the pressure chamber 18a from the drain hole 20a of the main valve body 20 provided in the ball cock 14 cannot flow out, and the pressure in the pressure chamber 18a rises. Fig. 9 At time t6, the main valve body 20 is pressed and seated on the valve seat 22 by the pressure in the pressure chamber 18a, and the main valve body 20 is closed. As a result, the water supply from the water supply source 6 to the hydraulic drive mechanism 16 via the ball cock 14 is stopped, and the supply of washing water to the washing water tank 4 is stopped.

[0087] If the water supply to the hydraulic drive mechanism 16 is stopped, the piston 16b ( Figure 4 ) is pressed down by the force of the spring 16c. Along with this, the rod 30 installed on the piston 16b also descends. When the rod 30 descends to a predetermined position, the rod 30 is connected to the valve shaft 12a of the second drain valve 12 again through the clutch mechanism 32. Thus, the toilet cleaning is completed once, and the flush toilet device 1 returns to the Figure 2 The toilet cleaning standby state is shown.

[0088] In this way, the water level in the washing water tank 4 rises to the set water level L. 1 The moment when the pilot valve 28 is closed ( Fig. 9 The moment t5) and the moment when the main valve body 20 of the ball cock 14 is closed ( Fig. 9 Furthermore, during the period from time t5 to t6, since the main valve body 20 is already opened, the washing water continues to be supplied. At time t6, when the main valve body 20 is closed, the water level in the washing water tank 4 becomes higher than the set water level L. 1 The initial water level L 2 .

[0089] As a result, the initial water level L in the flush water tank 4 in the standby state of the flush toilet apparatus 1 is 2 , which is higher than the specified set water level L at which the pilot valve 28 is closed 1 Therefore, in the standby state, when the user operates the lever handle 4a ( Fig. 9 At time t1), the water level in the cleaning water tank 4 is higher than the set water level L 1 , the main valve body 20 of the ball cock 14 will not be opened. Afterwards, during the period from time t1 to t2, a predetermined amount of washing water is discharged from the first drain port 4b as an inner edge spout. When the water level in the washing water tank 4 drops to the set water level L 1 When the pilot valve 28 is opened, the main valve body 20 of the ball cock 14 is also opened. Thus, at time t2, water supply to the hydraulic drive mechanism 16 is started, the second drain valve 12 is opened by the hydraulic drive mechanism 16, and jet water spouting is started.

[0090] According to the flush toilet device of the first embodiment of the present invention, the first drain valve 10 switches the discharge and stop of the washing water from the inner rim water spouting port 2d, and the second drain valve 12 switches the discharge and stop of the washing water from the jet water spouting port 2e, so that the timing of the inner rim water spouting and the jet water spouting can be freely set independently, and the bowl portion 2a ( 2a ) of the flush toilet body 2 can be effectively cleaned with less washing water. Figure 1In addition, the second drain valve 12 is opened by the water pressure driving mechanism 16 using the water supply pressure of the washing water, so it is not necessary to pull up the drain valve by electrical power such as a motor, and a complex mechanism for opening the drain valve is not used, and the opening timing can be set.

[0091] In addition, according to the flush toilet device of this embodiment, the second drain valve 12 is opened more slowly than the first drain valve 10 by the delay mechanism, that is, the ball cock 14. Fig. 9 ), therefore, according to the structure of the flush toilet body 2, it is possible to start spouting water from the inner edge spout 2d and the jet spout 2e at the necessary time, and it is possible to effectively clean the bowl 2a while suppressing the amount of cleaning water.

[0092] Furthermore, according to the flush toilet device 1 of this embodiment, the second drain valve 12 is opened by the hydraulic drive mechanism 16, so that the timing of supplying flush water to the hydraulic drive mechanism 16 is adjusted ( Fig. 9 The timing of starting water spouting from the jet water spouting port 2e can be adjusted at time t2), and the timing of starting jet water spouting can be freely set.

[0093] In addition, according to the flush toilet device of this embodiment, when the float 24 of the ball cock 14 drops to a specified position, cleaning water is supplied to the hydraulic drive mechanism 16. Therefore, according to the water level in the cleaning water tank 4, cleaning water is supplied to the hydraulic drive mechanism 16 at an appropriate time, and water spouting from the jet spouting port 2e can be started.

[0094] Next, refer to Figures 10 to 12 A flush toilet device according to a second embodiment of the present invention will be described. The structure of the delay mechanism in the flush water tank of the flush toilet device of this embodiment is different from that of the first embodiment described above. Therefore, only the structure and function of the second embodiment of the present invention that are different from the first embodiment will be described below, and the same structure will be marked with the same reference numerals and the description will be omitted.

[0095] Fig.10 It is a cross-sectional view showing a schematic structure of a flush water tank provided in a flush toilet apparatus according to a second embodiment of the present invention. Fig.11 This is a schematic diagram for explaining the operation of the flush water tank in the flush toilet device according to the second embodiment of the present invention. Fig.12 It is a timing chart showing the operation of the flush toilet device according to the second embodiment of the present invention.

[0096] like Fig.10As shown, the flush water tank 4 provided by the flush toilet device of this embodiment has a first drain valve 10, a second drain valve 12, a ball cock 14, and a hydraulic drive mechanism 16. In addition, as in the first embodiment described above, the ball cock 14 has a float 24, and the pilot valve is opened and closed by the float 24, and the main valve body of the ball cock 14 is opened and closed, which is also the same as in the first embodiment. Here, in this embodiment, as a delay mechanism, in addition to the ball cock 14, a small tank 40 is provided so as to surround the float 24 of the ball cock 14.

[0097] The small water tank 40 is a small water tank arranged in the cleaning water tank 4 in a manner of surrounding the float 24. The float 24 moves up and down according to the water level in the small water tank 40. Fig.10 In the standby state of the flush toilet device shown, the flush toilet device is arranged in the flush water tank 4 in a state of being completely submerged in water. That is, the small water tank 40 is formed in a box shape with an upper opening so as to receive the float 24 from above, and its upper end is arranged at an initial water level L in the flush water tank 4. 2 Compared to a lower position. Therefore, Fig.10 In the standby state shown, the small water tank 40 is completely submerged in the cleaning water in the cleaning water tank 4, and the interior of the small water tank 40 is filled with cleaning water.

[0098] Furthermore, a discharge hole 40a is provided on the bottom surface of the small water tank 40, and the discharge hole 40a is configured to be opened and closed by a check valve float 42 provided on the bottom surface of the small water tank 40. The check valve float 42 includes: a float portion that receives buoyancy from the washing water in the washing water tank 4; and a seal member for closing the discharge hole 40a. Furthermore, the check valve float 42 is mounted on the bottom surface of the small water tank 40 so as to be movable up and down, so as to open and close the discharge hole 40a.

[0099] That is, the check valve float 42 is constructed so as to be lifted upward by the buoyancy borne by the float portion. Therefore, when the water level of the washing water in the washing water tank 4 is higher than the bottom surface of the small water tank 40, the seal of the check valve float 42 is pushed to the discharge hole 40a on the bottom surface of the small water tank 40 by the buoyancy, and the discharge hole 40a is closed. On the other hand, when the water level in the washing water tank 4 drops, the check valve float 42 also drops by its own weight, the discharge hole 40a is opened, and the washing water in the small water tank 40 is discharged into the washing water tank 4.

[0100] With this structure, when the water level in the washing water tank 4 drops, the water level in the small tank 40 drops slower than the water level in the washing water tank 4. The float 24 of the ball cock 14 drops in conjunction with the water level in the small tank 40, so the main valve body of the ball cock 14 opens slower than the drop in the water level in the washing water tank 4. With this action, the supply of washing water to the hydraulic drive mechanism 16 and the opening of the second drain valve 12 are delayed.

[0101] Next, refer to Fig.11 and Fig.12 The operation of the flush toilet device according to the second embodiment of the present invention will be described. First, in Fig.12 At time t11, when the user rotates the lever handle 4a of the washing water tank 4, the bead chain 10a connected thereto pulls up the first drain valve 10. As a result, the first drain port 4b is opened, and the washing water in the washing water tank 4 is discharged from the inner edge water discharge port.

[0102] Since the washing water is discharged from the first drain port 4b, the water level in the washing water tank 4 drops. However, when the water level in the washing water tank 4 is higher than the bottom surface of the small tank 40, the discharge hole 40a of the small tank 40 is closed by the check valve float 42, so the water level in the small tank 40 does not change. Therefore, the float 24 in the small tank 40 does not drop, and the main valve body of the ball cock 14 remains closed.

[0103] When the water level in the washing water tank 4 further drops and becomes lower than the bottom surface of the small water tank 40, the check valve float 42 of the small water tank 40 is opened, and the washing water in the small water tank 40 also starts to flow out from the discharge hole 40a. Fig.12 At time t12, when the water level in the small water tank 40 is lower than the specified set water level L 3 When Fig.11 As shown, the float 24 of the ball cock 14 descends and the pilot valve is opened. As a result, the main valve body 20 of the ball cock 14 is opened and water starts to be supplied to the hydraulic drive mechanism 16. When water is supplied to the hydraulic drive mechanism 16, the second drain valve 12 is pulled up by the hydraulic drive mechanism 16 and water starts to be spouted from the jet spout port 2e.

[0104] After the water spouting from the jet spouting port 2e starts at time t12, the second drain valve 12 is closed at time t13, and the first drain valve 10 is closed at time t14. Since the description is the same as the first embodiment described above, the description is omitted. At time t14, after the first drain valve 10 is closed, the water level in the washing water tank 4 rises. After that, even if the water level in the washing water tank 4 is higher than the bottom surface of the small tank 40, the discharge hole 40a of the small tank 40 is closed due to the buoyancy acting on the check valve float 42, so the water level in the small tank 40 does not rise. When the water level in the washing water tank 4 further rises and the water level in the washing water tank 4 is higher than the upper end of the small tank 40, the washing water flows into the small tank 40, and the water level in the small tank 40 also rises.

[0105] Afterwards, at time t15, when the water level in the small water tank 40 is still higher than the specified set water level L 3 At time t16, the main valve body of the ball cock 14 is closed, and the water supply to the hydraulic drive mechanism 16 is stopped. As a result, the rod extending from the piston 16b of the hydraulic drive mechanism 16 descends, and the rod is connected to the valve shaft of the second drain valve 12 again through the clutch mechanism 32. As a result, the toilet cleaning is completed once, and the flush toilet device returns to the state of Fig.10 The toilet cleaning standby state is shown.

[0106] According to the flush toilet device of the second embodiment of the present invention, the delay mechanism includes a small water tank 40 and a check valve float 42. When the water level in the small water tank 40 drops below a predetermined set water level L 3 When the washing water is supplied to the hydraulic drive mechanism 16 ( Fig.11 ). Therefore, the timing of supplying washing water to the water pressure driving mechanism 16 can be freely set by the structure of the small water tank 40, so that water spouting can be started at a timing suitable for washing.

[0107] Next, refer to Fig.13 and Fig.14 A flush toilet device according to a third embodiment of the present invention will be described. The flush toilet device of this embodiment has a delay mechanism in the flush water tank, which is different from the first embodiment described above. Therefore, only the structure and function of the third embodiment of the present invention that are different from the first embodiment will be described below, and the same structure will be marked with the same reference numerals and the description will be omitted.

[0108] Fig.13 It is a cross-sectional view showing a schematic structure of a flush water tank provided in a flush toilet apparatus according to a third embodiment of the present invention. Fig.14It is a timing chart showing the operation of the flush toilet device according to the third embodiment of the present invention.

[0109] like Fig.13 As shown, the flush water tank 4 provided in the flush toilet apparatus of the present embodiment includes a first drain valve 10 , a second drain valve 12 , a first ball cock 50 , a second ball cock 52 , and a water pressure drive mechanism 16 .

[0110] In addition, similar to the ball cock 14 in the first embodiment described above, the first ball cock 50 is configured to start supplying water to the flushing water tank by moving in conjunction with the water level in the flushing water tank 4. That is, the first ball cock 50 has a float 24, and the float 24 moves up and down in conjunction with the water level in the flushing water tank 4, thereby opening and closing the pilot valve and opening and closing the main valve body of the first ball cock 50. In addition, in this embodiment, as a delay mechanism, in addition to the first ball cock 50, a second ball cock 52 is also provided.

[0111] The second ball cock 52 is provided on the downstream side of the first ball cock 50 and the upstream side of the hydraulic drive mechanism 16. When the main valve body of the first ball cock 50 is opened, the washing water starts to be supplied to the second ball cock 52. The second ball cock 52 has a float 56, and is configured to open and close the built-in main valve body in conjunction with the water level in the washing water tank 4. That is, the structure of the second ball cock 52 is also the same as the structure of the ball cock 14 in the first embodiment described above. In addition, a water supply port 58 is provided on the pipeline between the first ball cock 50 and the second ball cock 52. And, in the state where the first ball cock 50 is opened and the second ball cock 52 is closed, the whole amount of washing water flowing out of the first ball cock 50 is discharged from the water supply port 58 and flows into the washing water tank 4.

[0112] Furthermore, the first ball cock 50 is configured so that when the water level in the flushing water tank 4 drops to a predetermined first water level L 4 When the main valve body is opened, the second ball cock 52 is configured so that when the water level in the cleaning water tank 4 drops below the first water level L 4 The second water level L 5 Thus, the second ball cock 52 is configured to delay opening after the first drain valve 10 is opened and the water level in the first water tank portion 54a begins to drop. Thereafter, when the second ball cock 52 is opened, water supply to the water pressure drive mechanism 16 begins.

[0113] Next, refer to Fig.14 The operation of the flush toilet device according to the third embodiment of the present invention will be described. First, in Fig.14At time t21, when the user rotates the lever handle 4a of the washing water tank 4, the bead chain 10a connected thereto pulls up the first drain valve 10. As a result, the first drain port 4b is opened, and the washing water in the washing water tank 4 is discharged from the inner edge water discharge port.

[0114] Since the washing water is discharged from the first drain port 4b, the water level in the washing water tank 4 drops. Then, when the water level in the washing water tank 4 drops to a predetermined first water level L 4 , the main valve body of the first ball cock 50 is opened. In this state, the main valve body of the second ball cock 52 is not opened, so the entire amount of the washing water supplied from the water supply source and flowing through the first ball cock 50 flows from the water supply port 58 into the washing water tank 4. Here, the flow rate of the washing water discharged from the first drain port 4b is greater than the flow rate of the washing water flowing from the water supply port 58 into the washing water tank 4, so the water level in the washing water tank 4 will drop even after the first ball cock 50 is opened.

[0115] When the water level in the washing water tank 4 further drops to a predetermined second water level L 5 When the main valve body of the second ball cock 52 is opened, Fig.14 At time t22, water starts to be supplied to the hydraulic drive mechanism 16. When water is supplied to the hydraulic drive mechanism 16, the second drain valve 12 is pulled up by the hydraulic drive mechanism 16, and water starts to be spouted from the jet water spouting port 2e. In addition, the washing water supplied to the hydraulic drive mechanism 16 flows into the washing water tank 4 after passing through the cylinder of the hydraulic drive mechanism 16. And, in a state where the main valve body of the first ball cock 50 and the main valve body of the second ball cock 52 are opened, a part of the washing water supplied to the washing water tank 4 flows into the washing water tank 4 from the water supply port 58, and the remaining washing water flows into the washing water tank 4 after passing through the cylinder of the hydraulic drive mechanism 16.

[0116] After time t22, when the second drain valve 12 is pulled up to a predetermined height, the second drain valve 12 is separated from the rod of the hydraulic drive mechanism 16 by the clutch mechanism 32, and the second drain valve 12 starts to descend. Fig.14 At time t23, the second drain valve 12 is located at the second drain port 4c, and the water spouting from the jet spouting port 2e is stopped. Even after the second drain valve 12 is closed, the first ball cock 50 and the second ball cock 52 remain open, so the washing water from the water supply port 58 and the water pressure drive mechanism 16 continues to flow into the washing water tank 4.

[0117] Even after the second drain valve 12 is closed, the first drain valve 10 is still open, so even if the washing water flows into the washing water tank 4, the water level in the first tank portion 54a will drop. Fig.14At time t24, when the water level in the cleaning water tank 4 drops to the specified dead water level, the first drain valve 10 is located at the first drain port 4b, stopping the spouting of water from the inner edge spout port 2d. By closing the first drain valve 10, the water level in the cleaning water tank 4 starts to rise.

[0118] Then, at time t25, when the water level in the washing water tank 4 exceeds the second water level L 5 When the second ball cock 52 is closed, the main valve body of the second ball cock 52 is closed. As a result, the entire amount of washing water supplied from the water supply source flows into the washing water tank 4 from the water supply port 58. In addition, when the supply of washing water from the second ball cock 52 to the hydraulic drive mechanism 16 is stopped, the rod extending from the piston 16b of the hydraulic drive mechanism 16 descends, and the rod is connected to the valve shaft of the second drain valve 12 again through the clutch mechanism 32.

[0119] Furthermore, at time t26, when the water level in the washing water tank 4 exceeds the first water level L 4 When the main valve body of the first ball cock 50 is closed, the supply of flushing water to the flushing water tank 4 is also stopped. As a result, the supply of flushing water from the water supply source to the flushing water tank 4 is stopped. As a result, the flushing of the toilet is completed once, and the flush toilet device returns to the normal state. Fig.13 The toilet cleaning standby state is shown.

[0120] The flush toilet device according to the third embodiment of the present invention comprises: a first ball cock 50, which is 4 Start supplying water to the cleaning water tank 4 ( Fig.14 and the second ball cock 52, in the first water level L 4 The lower second water level L 5 Start supplying washing water to the hydraulic drive mechanism 16 ( Fig.14 Therefore, by setting the float 56 of the second ball cock 52, the timing of supplying washing water to the hydraulic drive mechanism 16 can be freely set, and water spouting can be started at a timing suitable for washing.

[0121] Next, a flush toilet device according to a fourth embodiment of the present invention will be described with reference to the drawings. Fig.15 It is a block diagram showing a flush toilet device according to a fourth embodiment of the present invention. Fig.16 It is a cross-sectional view showing a schematic structure of a flush water tank provided in a flush toilet apparatus according to a fourth embodiment of the present invention. Fig.17 It is a cross-sectional view showing the structure of a ball cock built into a flush water tank in a flush toilet device according to a fourth embodiment of the present invention. Fig.18It is a cross-sectional view showing the structure of a hydraulic drive mechanism built into a flush water tank in a flush toilet device according to a fourth embodiment of the present invention.

[0122] like Fig.15 As shown, the flush toilet device 101 involved in the embodiment of the present invention is composed of a flush toilet, that is, a flush toilet body 102 and a flush water tank 104 arranged at the rear of the flush toilet body 102. The flush toilet device 101 of this embodiment is configured so that after use, a lever handle 104a provided in the flush water tank 104 is operated to perform flushing. In addition, as a modified example, the present invention can also be configured so that flushing is performed based on a control signal from a remote control device (not shown) or a detection signal from a human body sensing sensor (not shown).

[0123] The flush toilet body 102 includes a bowl 102a and a drain bend pipe 102c extending from the lower portion of the bowl 102a. In addition, an inner edge water spout 102d is provided at the upper edge of the bowl 102a, and a jet water spout 102e is provided at the lower portion of the bowl 102a. When the toilet is flushed, the inner edge water spout 102d and the jet water spout 102e are respectively spouted at a predetermined time, and the waste receiving surface of the bowl 102a is cleaned, and at the same time, the waste and the wash water in the bowl 102a are discharged to the drain bend pipe 102c. The waste and the wash water discharged to the drain bend pipe 102c are discharged to the sewer pipe (not shown) through the drain pipe seat (not shown).

[0124] Wash water is supplied from a water supply source 106 such as a water pipe to the wash water tank 104 via a stopcock 108, and the supplied wash water is stored in the wash water tank 104 to a predetermined water level. The stopcock 108 is provided to stop the supply of wash water to the wash water tank 104 when maintenance is performed, and is usually in an "open" state. In addition, the wash water tank 104 has a first drain valve 110 and a second drain valve 112 built therein, and is configured to open and close the first drain port 104b and the second drain port 104c provided at the bottom of the wash water tank 104, respectively.

[0125] The washing water flowing out of the first drain port 104b flows through the rim water conduit 102f formed inside the flush toilet body 102, and then is discharged from the rim water spouting port 102d. Thus, the first drain valve 110 opens and closes the first drain port 104b provided in the flush water tank 104, thereby switching between the discharge and stop of the washing water from the rim water spouting port 102d. In addition, the washing water flowing out of the second drain port 104c flows through the jet water conduit 102g formed inside the flush toilet body 102, and then is discharged from the jet water spouting port 102e. Thus, the second drain valve 112 opens and closes the second drain port 104c provided in the flush water tank 104, thereby switching between the discharge and stop of the washing water from the jet water spouting port 102e.

[0126] Next, refer to Fig.16 The internal structure of the washing water tank 104 will be described. like Fig.16 As shown, the flushing water tank 104 includes: a first drain valve 110 for opening and closing a first drain port 104b; a second drain valve 112 for opening and closing a second drain port 104c; a ball cock 114 as a delay mechanism; and a hydraulic drive mechanism 116.

[0127] The flush water tank 104 is a tank configured to store flush water to be supplied to the flush toilet body 102, and has a first drain port 104b and a second drain port 104c formed at its bottom for discharging flush water to the flush toilet body 102. In addition, a partition wall 105 is provided inside the flush water tank 104, and the flush water tank 104 is divided into a first tank portion 105a provided with the first drain port 104b and a second tank portion 105b provided with the first drain port 104b. In addition, a small hole 105c is provided at a predetermined height position of the partition wall 105, and the first tank portion 105a and the second tank portion 105b are connected at a predetermined water level through the small hole 105c.

[0128] The first drain valve 110 is a valve body configured to open and close the first drain port 104b. The first drain port 104b is opened by pulling the first drain valve 110 upward. As a result, the flush water in the first tank portion 105a of the flush water tank 4 is discharged to the inner edge water conduit 102f ( Fig.15 ) and is ejected from the inner edge water outlet 102d.

[0129] In this embodiment, the user rotates the lever handle 104a provided in the flush water tank 104, thereby pulling the bead chain 110a ( Fig.16In addition, in the present embodiment, the first drain valve 110 is a valve body having a float 110b, which is configured to be opened by being pulled up from the first drain port 104b, and then slowly dropped as the water level in the first water tank portion 105a drops, and is closed when it drops to a predetermined water level.

[0130] The second drain valve 112 is a valve body configured to open and close the second drain port 104c. The second drain valve 112 is pulled upward, thereby opening the second drain port 104c. As a result, the flush water in the second tank portion 105b of the flush water tank 104 is discharged to the jet water conduit 102g ( Fig.15 ) and is ejected from the jet water outlet 102e.

[0131] In this embodiment, the second drain valve 112 is configured to be pulled up from the second drain port 104c by the hydraulic drive mechanism 116. The second drain valve 112 is a valve body having a valve shaft 112a and a float 112b extending upward, and the valve shaft 112a is pulled up by the hydraulic drive mechanism 116. Afterwards, when it is pulled up to a predetermined height, it is separated from the hydraulic drive mechanism 116, and slowly descends as the water level in the second water tank portion 105b drops, thereby closing the second drain port 104c.

[0132] In addition, in this embodiment, the float 112b of the second drain valve 112 is installed at a higher position than the float 110b of the first drain valve 110, so when the water level in the second water tank 105b is relatively high, it is located at the second drain port 104c and closed. That is, even if the water levels of the first water tank 105a and the second water tank 105b decrease while maintaining the same water level, the second drain valve 112 is located at the second drain port 104c earlier than the first drain valve 110 and closed.

[0133] The delay mechanism, namely the ball cock 114 , is configured so that the washing water supplied from the water supply source 106 flows in after passing through the inflow pipe 114 a . In the present embodiment, due to the action of the ball cock 114 , the second drain valve 112 opens later than the first drain valve 110 .

[0134] Next, refer to Fig.17 The structure of the ball cock 114 will be described. like Fig.17As shown in FIG. 1 , the ball cock 114 includes a body 118 connected to an inflow pipe 114a and an outflow pipe 114b, a main valve body 120 disposed in the body 118, a valve seat 122 held in place by the main valve body 120, an arm 126 rotated by a float 124, and a pilot valve 128 moved by the rotation of the arm 126. That is, the ball cock 114 includes a float 124 that operates in conjunction with the water level in the washing water tank 104, and is configured to supply washing water to the hydraulic drive mechanism 116 when the float 124 drops to a predetermined position.

[0135] The main body 118 is a member having a connection portion of the inflow pipe 114a at the lower part and a connection portion of the outflow pipe 114b at one side. In addition, a valve seat 122 is formed inside the main body 118, and the valve seat 122 is connected to the outflow pipe 114b connected to the connection portion. In addition, a main valve body 120 is arranged inside the main body 118 to open and close the valve seat 122, so that when the valve seat 122 is opened, the tap water flowing in from the inflow pipe 114a flows through the valve seat 122 and then flows out to the outflow pipe 114b. In addition, the outflow pipe 114b is connected to the water pressure drive mechanism 116.

[0136] The main valve body 120 is a diaphragm valve body in a substantially disk-shaped manner, and is installed in the body portion 118 in a manner that it can be seated and separated from the valve seat 122. In addition, a drain hole 120a is provided at the peripheral edge of the main valve body 120. In addition, in the body portion 118, on the opposite side of the valve seat 122 ( Fig.17 In other words, the pressure chamber 118a is defined by the inner wall surface of the main body 118 and the main valve body 120. If the pressure in the pressure chamber 118a increases, the main valve body 120 is pushed against the valve seat 122 by the pressure and is seated on the valve seat 122.

[0137] A pressure passage 118b extends upwardly in communication with the pressure chamber 118a provided in the main body 118, and a pilot valve port 128a is provided at the upper end of the pressure passage 118b. The pilot valve port 128a opens upward and is opened and closed by the pilot valve 128.

[0138] On the other hand, the float 124 is supported by an arm 126, and the arm 126 is rotatably supported by a support shaft 126a. In addition, a pilot valve 128 is connected to the arm 126, and the pilot valve 128 is configured to move in the vertical direction along with the rotation of the arm 126. As a result, the water level in the first tank portion 105a of the flush water tank 104 rises to a predetermined set water level L. 1In the above state, the float 124 is lifted upward, and the pilot valve 128 moves downward and seats at the pilot valve port 128a, thereby closing it. On the other hand, when the washing water in the first water tank portion 105a is discharged and the water level in the first water tank portion 105a drops, the float 124 drops downward, the pilot valve 128 moves upward, and the pilot valve port 128a is opened. Therefore, when the water level in the first water tank portion 105a is higher than the set water level L 1 When the toilet is on standby for cleaning, the pilot valve port 128a of the main body 118 is in a closed state.

[0139] In addition, the tap water flowing into the main body 118 from the inlet pipe 114a flows into the annular space around the valve seat 122, and from there flows into the pressure chamber 118a after passing through the discharge hole 120a of the main valve body 120. Here, in the state where the pilot valve port 128a is closed by the pilot valve 128, there is no outflow path for the tap water flowing into the pressure chamber 118a from the discharge hole 120a, and the pressure in the pressure chamber 118a increases. In this way, when the pressure in the pressure chamber 118a increases, the main valve body 120 is pressed against the valve seat 122 (towards the valve seat 122) due to the pressure. Fig.17 The valve seat 122 is closed by the main valve body 120 .

[0140] On the other hand, when the first drain valve 110 is opened due to the washing operation and the water level in the first tank portion 105a of the washing water tank 104 is lower than the set water level L 1 When the float 124 moves downward, the pilot valve 128 moves upward, and the pilot valve port 128a is opened. When the pilot valve port 128a is opened, the water in the pressure chamber 118a flows out from the pilot valve port 128a, and the pressure in the pressure chamber 118a decreases. As a result, the main valve body 120 (toward the valve seat 122) is pulled away from the valve seat 122. Fig.17 The left side in the middle moves, and the valve seat 122 is opened. In this way, when the pilot valve port 128a is opened, the pressure in the pressure chamber 118a does not rise, so the valve seat 122 is in the opened state.

[0141] Next, refer to Fig.18 The structure of the water pressure driving mechanism 116 will be described. The hydraulic drive mechanism 116 is configured to drive the second drain valve 112 using the water supply pressure of the washing water supplied from the water pipe to the washing water tank. Specifically, the hydraulic drive mechanism 116 includes a cylinder 116a into which the water supplied from the ball cock 114 flows; a piston 116b slidably disposed in the cylinder 116a; and a rod 130 protruding from the lower end of the cylinder 116a to drive the second drain valve 112. In addition, a spring 116c is disposed inside the cylinder 116a to apply force to the piston 116b downward, and a seal is installed on the piston 116b to ensure water tightness between the inner wall surface of the cylinder 116a and the piston 116b. In addition, a clutch mechanism 132 is provided at the lower end of the rod 130, and the rod 130 is connected / disconnected with the valve shaft 112a of the second drain valve 112 by the clutch mechanism 132.

[0142] The cylinder 116a is a cylindrical member, and is configured with its axis oriented in the vertical direction, and the piston 116b is slidably received therein. In addition, an outflow pipe 114b extending from the ball cock 114 is connected to the lower end of the cylinder 116a, and the cleaning water flowing out of the ball cock 114 flows into the cylinder 116a. Therefore, the piston 116b in the cylinder 116a is lifted against the force of the spring 116c by the water flowing into the cylinder 116a.

[0143] On the other hand, an outflow hole is provided at the upper end of the cylinder 116a, and the water supply pipe 134 is connected to the inside of the cylinder 116a through the outflow hole. Therefore, when water flows into the cylinder 116a from the outflow pipe 114b connected to the lower part of the cylinder 116a, the piston 116b is lifted upward from the lower part of the cylinder 116a. Thereafter, when the piston 116b is lifted to a position closer to the upper side than the outflow hole, the water that has flowed into the cylinder 116a flows out from the outflow hole to the water supply pipe 134. In addition, the washing water that has flowed into the water supply pipe 134 falls into the second tank portion 105b of the washing water tank 104, and the washing water is supplied to the washing water tank 104.

[0144] The rod 130 is a rod-shaped member connected to the bottom of the piston 116b, and extends from the cylinder 116a through a through hole formed on the bottom surface of the cylinder 116a so as to protrude downward. In addition, the valve shaft 112a of the second drain valve 112 is connected to the lower end of the rod 130 via a clutch mechanism 132, and the rod 130 connects the piston 116b and the second drain valve 112. Therefore, when water flows into the cylinder 116a and the piston 116b is lifted, the rod 130 connected to the piston 116b lifts the second drain valve 112 upward, and the second drain valve 112 is opened.

[0145] In addition, a gap is provided between the rod 130 protruding from the bottom of the cylinder 116a and the inner wall of the through hole of the cylinder 116a, and a part of the water flowing into the cylinder 116a flows out from the gap. The water flowing out from the gap flows into the second water tank portion 105b. Moreover, since the gap is relatively narrow and the flow path resistance is large, even when water flows out from the gap, the pressure in the cylinder 116a rises due to the water flowing into the cylinder 116a from the outflow pipe 114b, and the piston 116b is lifted against the force of the spring 116c.

[0146] The clutch mechanism 132 detachably connects the rod 130 and the second drain valve 112. The clutch mechanism 132 is configured to separate the valve shaft 112a of the second drain valve 112 from the rod 130 when the second drain valve 112 is lifted by a predetermined distance together with the rod 130. In the state where the clutch mechanism 132 is separated, the second drain valve 112 is not linked to the movement of the piston 116b and the upper part of the rod 130, and the second drain valve 112 is lowered as the water level in the second tank portion 105b of the washing water tank 104 drops.

[0147] Next, refer to Figures 19 to 24 The operation of the flush toilet device 101 according to the fourth embodiment of the present invention will be described. Figures 19 to 23 This is a schematic diagram for explaining the operation of the flush toilet device 101 according to the fourth embodiment of the present invention. Fig.24 It is a timing chart showing the operation of the flush toilet device 101 according to the fourth embodiment of the present invention.

[0148] First, as mentioned above, in the toilet cleaning standby state, if Fig.16 As shown in FIG. 1 , the first drain port 104b and the second drain port 104c of the cleaning water tank 104 are closed by the first drain valve 110 and the second drain valve 112, respectively. In addition, the first tank portion 105a and the second tank portion 105b of the cleaning water tank 104 are connected by the small hole 105c of the partition wall 105, so that in the standby state, the water levels of the first tank portion 105a and the second tank portion 105b are the same. The initial water level L in the cleaning water tank 104 is 2 Higher than the specified set water level L 1 (About the initial water level L 2 Higher than the set water level L 1 The reason will be described later). As a result, the body 118 ( Fig.17 )’s pilot valve port 128a is in a closed state, and the valve seat 122 is closed by the main valve body 120.

[0149] Next, in Fig.24At time t101, when the user rotates the lever handle 104a of the flushing water tank 104 to clean the toilet, the bead chain 110a connected thereto pulls up the first drain valve 110. Fig.19 As shown, the first drain valve 110 is pulled away from the first drain port 104b, and the first drain port 104b is opened. If the first drain port 104b is opened, the washing water stored in the first water tank portion 105a of the washing water tank 104 flows from the first drain port 104b into the inner edge water conduit 102f ( Fig.15 ) and is discharged from the inner edge water outlet 102d. The inner edge water from the inner edge water outlet 102d forms a swirling flow on the dirt receiving surface of the bowl portion 102a, and the dirt receiving surface is cleaned. In addition, when the water level of the first water tank portion 105a is higher than the water level of the second water tank portion 105b due to the discharge of the washing water, the washing water in the second water tank portion 105b flows into the first water tank portion 105a little by little through the small hole 105c of the partition wall 105.

[0150] The washing water is discharged from the first drain port 104b, whereby the water level in the first water tank portion 105a drops. Fig.24 At time t102, when the water level in the first water tank portion 105a is lower than the set water level L 1 When the float 124 of the ball cock 114 drops, the pilot valve 128 ( Fig.17 ) is opened. As a result, the pressure in the pressure chamber 118a decreases and the main valve body 120 is opened. Fig. 20 As shown, water supply to the water pressure drive mechanism 116 begins.

[0151] When washing water is supplied to the hydraulic drive mechanism 116, it flows into the cylinder 116a ( Fig.18 ) against the force of the spring 116c to lift the piston 116b. As a result, the rod 130 connected to the piston 116b pulls up the valve shaft 112a of the second drain valve 112, and the second drain port 104c is opened. That is, the second drain valve 112 is driven and opened by the water supply pressure of the tap water supplied by the ball cock 114.

[0152] When the second drain port 104c is opened, the washing water stored in the second tank portion 105b of the washing water tank 104 flows from the second drain port 104c into the jet water conduit 102g ( Fig.15 ) and is ejected from the jet water spouting port 102e. The inside of the drainage bend pipe 102c is filled with water by the jet water spouting from the jet water spouting port 102e, inducing a siphon effect. Due to the occurrence of the siphon effect, the accumulated water and dirt in the bowl 102a are attracted to the drainage bend pipe 102c and discharged to the sewer pipe (not shown).

[0153] When the second drain valve 112 is pulled up to a predetermined height together with the piston 116b of the hydraulic drive mechanism 116, the clutch mechanism 132 ( Fig.18 ) separates the valve shaft 112a of the second drain valve 112 from the rod 130. As a result, the second drain valve 112 descends toward the second drain port 104c. Fig.24 At time t103, Fig.21 As shown in FIG. 1 , the second drain valve 112 is located at the second drain port 104c, and the second drain port 104c is closed. As a result, the jet water spouting from the jet water spouting port 102e is stopped. Furthermore, as described above, since the float 112b of the second drain valve 112 is installed at a higher position, even if the water level in the first water tank portion 105a is the same as the water level in the second water tank portion 105b, the second drain valve 112 is located at the second drain port 104c earlier than the first drain valve 110.

[0154] exist Fig.21 In the state shown, the main valve body 120 of the ball cock 114 is in an open state, so the cleaning water supplied from the water supply source 106 (tap water pipe) is supplied to the water pressure drive mechanism 116 through the ball cock 114, and flows into the second water tank section 105b from the water supply pipe 134 connected to the cylinder body 116a. On the other hand, the first drain valve 110 is still in an open state, so the cleaning water in the first water tank section 105a flows out from the first drain port 104b and is discharged from the inner edge water outlet 102d. Fig.24 At time t103, after the jet water spouting is stopped, the washing water spouted from the inner rim water spouting port 102d is used as supplementary water for returning the water level in the bowl portion 102a to the accumulated water level in the standby state.

[0155] Here, the amount of washing water flowing from the second water tank section 105b into the first water tank section 105a through the small hole 105c of the partition wall 105 is small, so even if water is supplied from the water supply pipe 134 to the second water tank section 105b, the water level in the first water tank section 105a will drop, and the first drain valve 110 will also drop accordingly. Fig.24 At time t104, when the water level in the washing water tank 104 drops to the dead water level DWL, Fig. 22 As shown, the first drain valve 110 is located at the first drain port 104b and is closed, thereby stopping the rim water spouting from the rim water spouting port 102d.

[0156] Moreover, even after the first drain valve 110 has been closed, the main valve body 120 of the ball cock 114 still maintains the opened state, so the cleaning water supplied from the water supply source 106 (tap water pipe) flows from the water supply pipe 134 into the second water tank section 105b of the cleaning water tank 104 via the ball cock 114 and the hydraulic drive mechanism 116. Afterwards, when the water level in the second water tank section 105b is higher than the position of the small hole 105c of the partition wall 105, the cleaning water flows from the second water tank section 105b into the first water tank section 105a through the small hole 105c. Moreover, when the water level in the second water tank section 105b is further increased, the cleaning water that has passed the partition wall 105 flows from the second water tank section 105b into the first water tank section 105a. As a result, the water level in the first water tank section 105a rises. Afterwards, as Fig.23 As shown in FIG. 1 , when the water level in the first water tank portion 105a rises to the set water level L 1 When the float 124 of the ball cock 114 rises, the pilot valve 128 ( Fig.17 ) is closed.

[0157] In this way, when the pilot valve 128 is closed, the cleaning water flowing into the pressure chamber 118a from the drain hole 120a of the main valve body 120 provided in the ball cock 114 cannot flow out, and the pressure in the pressure chamber 118a rises. Fig.24 At time t105, the main valve body 120 is pressed and seated on the valve seat 122 by the pressure in the pressure chamber 118a, and the main valve body 120 is closed. As a result, the water supply from the water supply source 106 to the hydraulic drive mechanism 116 via the ball cock 114 is stopped, and the supply of washing water to the washing water tank 104 is stopped.

[0158] Here, in Fig.24 At time t105, when the water supply to the hydraulic drive mechanism 116 is stopped, Fig.23 As shown in FIG. 1 , due to the supply of cleaning water from the hydraulic drive mechanism 116 to the second water tank section 105b, the water level of the second water tank section 105b is higher than the water level of the first water tank section 105a. Therefore, the cleaning water in the second water tank section 105b flows into the first water tank section 105a through the small hole 105c of the partition wall 105. Fig.24 After time t105, the water level of the second water tank section 105b is lower than the height of the partition wall 105, and the water level of the first water tank section 105a is higher than the set water level L 1 . Afterwards, Fig.24 At time t106, the water levels of the first water tank section 105a and the second water tank section 105b become the same and return to the initial water level L 2 ( Fig.16 ).

[0159] On the other hand, if the water supply to the hydraulic drive mechanism 116 is stopped, the piston 116b ( Fig.18 ) is pressed down by the force of the spring 116c. Along with this, the rod 130 installed on the piston 116b also descends. When the rod 130 descends to a predetermined position, the rod 130 is connected to the valve shaft 112a of the second drain valve 112 again through the clutch mechanism 132. Thus, the toilet cleaning is completed once, and the flush toilet device 101 returns to the Fig.16 The toilet cleaning standby state is shown.

[0160] In this way, the water level in the first tank portion 105a of the flushing water tank 104 rises to the set water level L. 1 The pilot valve 128 is closed ( Fig.24 At time t105), after the main valve body 120 of the ball cock 114 is closed, the cleaning water in the second water tank section 105b flows into the first water tank section 105a through the small hole 105c of the partition wall 105. Fig.24 At time t106 after time t105, the water level in the first water tank portion 105a becomes higher than the set water level L 1 The initial water level L 2 .

[0161] As a result, the initial water level L in the first tank portion 105a in the standby state of the flush toilet device 101 is 2 , which is higher than the specified set water level L at which the pilot valve 128 is closed 1 Therefore, in the standby state, when the user operates the lever handle 104a ( Fig.24 At time t101), the water level in the first water tank section 105a is higher than the set water level L 1 , the main valve body 120 of the ball cock 114 will not be opened. Then, during the period from time t101 to t102, a predetermined amount of washing water is discharged from the first drain port 104b as an inner edge spout, and when the water level in the first water tank portion 105a drops to the set water level L 1 When the pilot valve 128 is opened, the main valve body 120 of the ball cock 114 is also opened. As a result, at time t102, water supply to the hydraulic drive mechanism 116 is started, and the second drain valve 112 is opened by the hydraulic drive mechanism 116 to start jet water spouting.

[0162] According to the flush toilet device 101 of the fourth embodiment of the present invention, the first drain valve 110 switches the spouting and stopping of the washing water from the rim spouting port 102d, and the second drain valve 112 switches the spouting and stopping of the washing water from the jet spouting port 102e, so that the timing of the rim spouting and the jet spouting can be freely set independently, and the bowl portion 102a of the flush toilet body 102 can be effectively cleaned. In addition, the second drain valve 112 is opened by the hydraulic drive mechanism 116 using the water supply pressure of the washing water, so that it is not necessary to pull up the drain valve by electrical power such as a motor, and the timing of spouting water from the jet spouting port 102e can be set without using a complicated mechanism for opening the drain valve. Moreover, since the first drain valve 110 is closed after the second drain valve 112 is closed, even after the water spouting from the jet water spouting port 102e is completed and the dirt in the bowl 102a is discharged into the drain bend pipe 102c, the water spouting from the inner edge water spouting port 102d will continue, and the accumulated water level in the bowl 102a can be set to an appropriate water level by replenishing it.

[0163] In addition, according to the flush toilet device 101 of this embodiment, the first water tank portion 105a provided with the first drain port 104b and the second water tank portion 105b provided with the second drain port 104c are separated by the partition wall 105, so that the unevenness of the amount of flush water spouted from each spout can be suppressed. As a result, the bowl portion 102a can be properly cleaned while suppressing the amount of flush water, and the water level in the bowl portion 102a after one cleaning is completed can be appropriately set.

[0164] Furthermore, according to the flush toilet device 101 of the present embodiment, a small hole 105c is provided on the partition wall 105 of the flush water tank 104, which connects the first tank section 105a and the second tank section 105b at a predetermined water level, so that when the water level in the second tank section 105b is higher than the water level in the first tank section 105a, the flush water flows from the second tank section 105b into the first tank section 105a. As a result, the water level of the first tank section 105a drops slowly, and the time during which the first drain valve 110 is opened can be extended. Therefore, the amount of flush water spouted from the inner edge spouting port 102d can be increased, and even after the spouting from the jet spouting port 102e ends, the spouting from the inner edge spouting port 102d continues. As a result, the accumulated water level in the bowl section 102a can be supplemented and set to an appropriate water level.

[0165] Next, refer to Fig.25 A flush toilet device according to a fifth embodiment of the present invention will be described. The structure of the flush toilet device of this embodiment that makes the closing of the first drain valve slower than the closing of the second drain valve is different from the above-mentioned fourth embodiment. Therefore, only the structure and function of the fifth embodiment of the present invention that are different from the fourth embodiment will be described below, and the same symbols are marked for the same structures and the description is omitted. Fig.25 It is a cross-sectional view showing a schematic structure of a flush water tank provided in a flush toilet apparatus according to a fifth embodiment of the present invention.

[0166] like Fig.25 As shown, the flush water tank 104 provided by the flush toilet device of this embodiment has a first drain valve 110, a second drain valve 142, a ball cock 114, and a hydraulic drive mechanism 116. In addition, similarly to the fourth embodiment described above, a first drain port 140a opened and closed by the first drain valve 110 and a second drain port 140b opened and closed by the second drain valve 142 are provided on the bottom surface of the flush water tank 104. In addition, a partition wall 105 is provided in the flush water tank 104, and the inside of the flush water tank 104 is divided into a first tank portion 105a provided with the first drain port 140a and a second tank portion 105b provided with the second drain port 140b. In addition, a small hole 105c is provided on the partition wall 105.

[0167] Here, in the present embodiment, the flow path cross-sectional area of ​​the first drain port 140a opened and closed by the first drain valve 110 and the rim water conduit 102f connected thereto is configured to be smaller than the flow path cross-sectional area of ​​the second drain port 140b opened and closed by the second drain valve 112 and the jet water conduit 102g connected thereto. Thus, the pressure loss of the rim water conduit 102f connecting the first drain port 140a and the rim water spouting port 102d is set to be larger than the pressure loss of the jet water conduit 102g connecting the second drain port 140b and the jet water spouting port 102e.

[0168] On the other hand, in the fourth embodiment, the float 112b of the second drain valve 112 is installed at a higher position than the float 110b of the first drain valve 110, so that the second drain valve 112 is closed earlier for the same water level drop. Fig.25 As shown, in this embodiment, the float 142 b of the second drain valve 142 is installed at substantially the same height as the float 110 b of the first drain valve 110 .

[0169] Next, the operation of the flush toilet device according to the fifth embodiment of the present invention will be described. First, when the user rotates the lever handle 104a of the washing water tank 104, the bead chain 110a connected thereto pulls up the first drain valve 110. As a result, the first drain port 140a is opened, and the washing water in the first tank portion 105a of the washing water tank 104 is discharged from the inner edge water discharge port.

[0170] Since the washing water is discharged from the first drain port 140a, the water level in the first tank portion 105a decreases. However, as in the fourth embodiment, the initial water level L in the first tank portion 105a is 2 Higher than the specified set water level L at which the pilot valve 128 is closed 1 , so the main valve body of the ball cock 114 maintains a closed state.

[0171] When the water level in the first water tank portion 105a further drops below the set water level L 1 , the float 124 of the ball cock 114 descends and the pilot valve is opened. As a result, the main valve body 120 of the ball cock 114 is opened and water starts to be supplied to the hydraulic drive mechanism 116. When water is supplied to the hydraulic drive mechanism 116, the second drain valve 142 is pulled up by the hydraulic drive mechanism 116, and the washing water is discharged from the second water tank portion 105b, and water spouting from the jet spouting port 102e starts. In addition, after being pulled up, the valve shaft 142a of the second drain valve 142 is separated from the rod 130 of the hydraulic drive mechanism 116 by the clutch mechanism 132.

[0172] After being pulled up, the first drain valve 110 is lowered in conjunction with the drop in the water level in the first water tank portion 105a, and after being pulled up, the second drain valve 142 is lowered in conjunction with the drop in the water level in the second water tank portion 105b. Here, in this embodiment, the pressure loss of the rim water conduit 102f connecting the first drain port 140a and the rim water spouting port 102d is set to be greater than the pressure loss of the jet water conduit 102g connecting the second drain port 140b and the jet water spouting port 102e. Therefore, in this embodiment, the water level in the second water tank portion 105b, which discharges the washing water from the second drain port 140b, drops earlier than the water level in the first water tank portion 105a.

[0173] Furthermore, in this embodiment, although the float 142b of the second drain valve 142 is set at almost the same height as the float 110b of the first drain valve 110, the water level in the second water tank portion 105b drops more quickly, so the second drain valve 142 is closed earlier than the first drain valve 110. In this way, after the second drain valve 142 is closed and the jet water spouting is stopped, the first drain valve 110 is delayed in closing and the inner edge water spouting is stopped. In addition, the action of returning the washing water tank 104 to the standby state after the inner edge water spouting is stopped is the same as that of the fourth embodiment described above, and therefore the description thereof is omitted.

[0174] According to the flush toilet device of the fifth embodiment of the present invention, the pressure loss of the rim water conduit 102f is set to be greater than the pressure loss of the jet water conduit 102g, so that the flow rate of the washing water per unit time flowing out of the first tank portion 105a is smaller than the flow rate of the washing water per unit time flowing out of the second tank portion 105b. As a result, the water level in the first tank portion 105a drops more slowly than the water level in the second tank portion 105b, and even after the water level in the second tank portion 105b drops and the second drain valve 142 is closed, the washing water in the first tank portion 105a continues to be spouted out from the rim water spouting port 102d. Thus, even after the spouting of water from the jet water spouting port 102e ends, the spouting of water from the rim water spouting port 102d continues, and the accumulated water level in the bowl portion 102a can be set to an appropriate water level by replenishment.

[0175] Next, refer to Fig.26 A flush toilet device according to a sixth embodiment of the present invention will be described. The structure of the flush toilet device of this embodiment that makes the closing of the first drain valve slower than the closing of the second drain valve is different from the above-mentioned fourth embodiment. Therefore, only the structure and function of the sixth embodiment of the present invention that are different from the fourth embodiment will be described below, and the same structure is marked with the same reference numerals and the description is omitted. Fig.26 It is a cross-sectional view showing a schematic structure of a flush water tank provided in a flush toilet apparatus according to a sixth embodiment of the present invention.

[0176] like Fig.26 As shown, the flush water tank 104 provided by the flush toilet device of this embodiment has a first drain valve 110, a second drain valve 152, a ball cock 114, and a hydraulic drive mechanism 116. In addition, similarly to the fourth embodiment described above, the bottom surface of the flush water tank 104 is provided with: a first drain port 104b opened and closed by the first drain valve 110; and a second drain port 104c opened and closed by the second drain valve 152. In addition, a partition wall 150 is provided in the flush water tank 104, and the inside of the flush water tank 104 is divided into a first tank portion 150a provided with the first drain port 104b and a second tank portion 150b provided with the second drain port 104c. In addition, a small hole 150c is provided in the partition wall 150.

[0177] Here, in the present embodiment, the volume of the first water tank portion 150a provided with the first drain valve 110 is configured to be larger than the volume of the second water tank portion 150b provided with the second drain valve 152. In addition, in the present embodiment, the flow path cross-sectional area of ​​the first drain port 104b opened and closed by the first drain valve 110 is configured to be almost the same as the flow path cross-sectional area of ​​the second drain port 104c opened and closed by the second drain valve 152.

[0178] On the other hand, in the fourth embodiment, the float 112b of the second drain valve 112 is installed at a higher position than the float 110b of the first drain valve 110, so that the second drain valve 112 is closed earlier for the same water level drop. Fig.26 As shown, in the present embodiment, the float 152 b of the second drain valve 152 is installed at substantially the same height as the float 110 b of the first drain valve 110 .

[0179] Next, the operation of the flush toilet device according to the sixth embodiment of the present invention will be described. First, when the user rotates the lever handle 104a of the washing water tank 104, the bead chain 110a connected thereto pulls up the first drain valve 110. As a result, the first drain port 104b is opened, and the washing water in the first tank portion 150a of the washing water tank 104 is discharged from the inner edge water discharge port.

[0180] Since the washing water is discharged from the first drain port 104b, the water level in the first tank portion 150a decreases. However, as in the first embodiment, the initial water level L in the first tank portion 150a is 2 Higher than the specified set water level L at which the pilot valve 128 is closed 1 , so the main valve body of the ball cock 114 maintains a closed state.

[0181] When the water level in the first water tank portion 150a further drops below the set water level L 1 , the float 124 of the ball cock 114 descends and the pilot valve is opened. As a result, the main valve body 120 of the ball cock 114 is opened and water starts to be supplied to the hydraulic drive mechanism 116. When water is supplied to the hydraulic drive mechanism 116, the second drain valve 152 is pulled up by the hydraulic drive mechanism 116, and the washing water is discharged from the second water tank portion 150b, and water spouting from the jet spouting port 102e starts. In addition, after being pulled up, the valve shaft 152a of the second drain valve 152 is separated from the rod 130 of the hydraulic drive mechanism 116 by the clutch mechanism 132.

[0182] After being pulled up, the first drain valve 110 is lowered in conjunction with the drop in the water level in the first water tank portion 150a, and after being pulled up, the second drain valve 152 is lowered in conjunction with the drop in the water level in the second water tank portion 150b. Here, in this embodiment, the volume of the first water tank portion 150a is formed to be larger than the volume of the second water tank portion 150b. Therefore, in this embodiment, although the flow rates per unit time of the washing water discharged from the first drain port 104b and the second drain port 104c are almost the same, the water level in the second water tank portion 150b drops earlier than the water level in the first water tank portion 150a.

[0183] Furthermore, in this embodiment, although the float 152b of the second drain valve 152 is set at almost the same height as the float 110b of the first drain valve 110, the water level in the second water tank portion 150b drops more quickly, so the second drain valve 152 is closed earlier than the first drain valve 110. In this way, after the second drain valve 152 is closed and the jet water spouting is stopped, the first drain valve 110 is delayed in closing and the inner edge water spouting is stopped. In addition, the action of returning the washing water tank 104 to the standby state after the inner edge water spouting is stopped is the same as that of the fourth embodiment described above, and therefore the description thereof is omitted.

[0184] According to the flush toilet device of the sixth embodiment of the present invention, the volume of the first tank portion 150a is formed to be larger than the volume of the second tank portion 150b, so the water level in the first tank portion 150a drops more slowly than the water level in the second tank portion 150b. As a result, even after the water level in the second tank portion 150b drops and the second drain valve 152 is closed, the flush water in the first tank portion 150a continues to be spouted out from the inner rim spouting port. Thus, even after the spouting from the jet spouting port ends, the spouting from the inner rim spouting port 102d continues, and the accumulated water level in the bowl portion 102a can be set to an appropriate water level by replenishment.

[0185] Next, a flush toilet device according to a seventh embodiment of the present invention will be described with reference to the drawings. Fig. 27 It is a block diagram showing a flush toilet device according to a seventh embodiment of the present invention. Fig.28 It is a cross-sectional view showing a schematic structure of a flush water tank provided in a flush toilet device according to a seventh embodiment of the present invention. Fig.29 This is a schematic diagram showing the schematic structure of an operating unit provided in a flush water tank of a flush toilet device according to a seventh embodiment of the present invention. Fig.30 It is a cross-sectional view showing the structure of a ball cock built into a flush water tank in a flush toilet device according to a seventh embodiment of the present invention. Fig.31It is a cross-sectional view showing the structure of a hydraulic drive mechanism built into a flush water tank in a flush toilet device according to a seventh embodiment of the present invention.

[0186] like Fig. 27 As shown, the flush toilet device 201 involved in the embodiment of the present invention is composed of a flush toilet, that is, a flush toilet body 202 and a flush water tank 204 arranged at the rear of the flush toilet body 202. The flush toilet device 201 of this embodiment is configured so that after use, a lever handle 205a provided in the flush water tank 204 is operated to perform flushing. In addition, as a modified example, the present invention can also be configured so that flushing is performed based on a control signal from a remote control device (not shown) or a detection signal from a human body sensing sensor (not shown).

[0187] The flush toilet body 202 includes a bowl 202a and a drain bend pipe 202c extending from the lower portion of the bowl 202a. In addition, an inner edge water spout 202d is provided at the upper edge of the bowl 202a, and a jet water spout 202e is provided at the lower portion of the bowl 202a. When the toilet is flushed, the inner edge water spout 202d and the jet water spout 202e are respectively spouted at a predetermined time, and the waste receiving surface of the bowl 202a is cleaned, and at the same time, the waste and the wash water in the bowl 202a are discharged to the drain bend pipe 202c. The waste and the wash water discharged to the drain bend pipe 202c are discharged to the sewer pipe (not shown) through the drain pipe seat (not shown).

[0188] Wash water is supplied from a water supply source 207 such as a water pipe to the wash water tank 204 via a stopcock 208, and the supplied wash water is stored in the wash water tank 204 to a predetermined water level. The stopcock 208 is provided to stop the supply of wash water to the wash water tank 204 during maintenance, etc., and is usually in an "open" state. In addition, the wash water tank 204 has a first drain valve 210 and a second drain valve 212 built therein, and is configured to open and close the first drain port 204b and the second drain port 204c provided at the bottom of the wash water tank 204, respectively.

[0189] The washing water flowing out of the first drain port 204b flows through the rim water conduit 202f formed inside the flush toilet body 202 and then is discharged from the rim water spouting port 202d. Thus, the first drain valve 210 opens and closes the first drain port 204b provided in the flush water tank 204, thereby switching between the discharge and stop of the washing water from the rim water spouting port 202d. In addition, the washing water flowing out of the second drain port 204c flows through the jet water conduit 202g formed inside the flush toilet body 202 and then is discharged from the jet water spouting port 202e. Thus, the second drain valve 212 opens and closes the second drain port 204c provided in the flush water tank 204, thereby switching between the discharge and stop of the washing water from the jet water spouting port 202e.

[0190] Next, refer to Fig.28 The internal structure of the washing water tank 204 will be described. like Fig.28 As shown, the washing water tank 204 has: a first drain valve 210 for opening and closing the first drain port 204b; a second drain valve 212 for opening and closing the second drain port 204c; a ball cock 214 as a delay mechanism; and a water pressure drive mechanism 216.

[0191] The flush water tank 204 is a tank configured to store flush water to be supplied to the flush toilet body 202, and has a first drain port 204b and a second drain port 204c formed at its bottom for discharging the stored flush water to the flush toilet body 202. In addition, a partition wall 206 is provided inside the flush water tank 204 to separate the flush water tank 204 into a first tank portion 206a provided with the first drain port 204b and a second tank portion 206b provided with the first drain port 204b.

[0192] The first drain valve 210 is a valve body configured to open and close the first drain port 204b. The first drain port 204b is opened by pulling the first drain valve 210 upward. As a result, the flush water in the first tank portion 206a of the flush water tank 204 is discharged to the inner edge water conduit 202f ( Fig. 27 ) and spit out from the inner edge water spout 202d. In addition, in the present embodiment, the first drain valve 210 is a valve body having a float 210b, which is configured to be pulled up from the first drain port 204b and opened, and then slowly dropped as the water level in the first water tank portion 206a drops.

[0193] In this embodiment, the user rotates the lever handle 205a provided on the washing water tank 204, thereby pulling up the first drain valve 210, and the first drain valve 210 is opened. In addition, in this embodiment, the large washing mode and the small washing mode can be selectively executed by the rotation direction of the lever handle 205a. In addition, the lever handle 205a constitutes a part of the operating part 205, and the large washing mode and the small washing mode are selectively executed by the operating part 205. The small washing mode supplies less washing water to the basin 202a than the large washing mode, and executes a washing sequence different from the large washing mode. The structure of the operating part 5 will be described later.

[0194] The second drain valve 212 is a valve body configured to open and close the second drain port 204c. When the second drain valve 212 is pulled upward, the second drain port 204c is opened. As a result, the flush water in the second tank portion 206b of the flush water tank 204 is discharged to the jet water conduit 202g ( Fig. 27 ) and is ejected from the jet water outlet 202e.

[0195] In this embodiment, the second drain valve 212 is configured to be pulled up from the second drain port 204c by the hydraulic drive mechanism 216. The second drain valve 212 is a valve body having a valve shaft 212a and a float 212b extending upward, and the valve shaft 212a is pulled up by the hydraulic drive mechanism 216. Afterwards, when it is pulled up to a predetermined height, it is separated from the hydraulic drive mechanism 216, and slowly descends as the water level in the second water tank portion 206b drops, thereby closing the second drain port 204c.

[0196] The delay mechanism, namely the ball cock 214, is configured so that the washing water supplied from the water supply source 207 flows in after passing through the inflow pipe 214a. Due to the action of the ball cock 214, the second drain valve 212 opens more slowly than the first drain valve 210 during heavy washing.

[0197] Next, refer to Fig.29 The structure of the operation unit 205 will be described. like Fig.29 As shown, the operating part 205 includes: a handle, i.e., a lever handle 205a, which is arranged on the side of the cleaning water tank 204; an axis 205b rotated by the lever handle 205a; a first arm 205c and a second arm 205d installed on the axis; a large cleaning bead chain 205e connecting the first arm 205c and the first drain valve 210; and a small cleaning bead chain 205f connecting the second arm 205d and the first drain valve 210.

[0198] The lever handle 205a is a lever provided on the side of the flush water tank 204 and is configured to be rotatable toward the front and rear of the flush toilet device 201. The large flushing mode and the small flushing mode can be selectively executed by the direction of rotation.

[0199] The shaft 205b is a rod-shaped member, fixed to the lever handle 205a, and horizontally extends in the width direction of the flush toilet device 201 in the upper part of the flush water tank 204. The shaft 205b is rotatably supported by the flush water tank 204, and rotates together with the lever handle 205a by rotating the lever handle 205a.

[0200] The first arm 205c is a slender member fixed in a direction orthogonal to the axis 205b, and extends horizontally toward the front of the flush toilet device 201. At the top of the first arm 205c, one end of a large cleaning bead chain 205e is installed, and the other end of the large cleaning bead chain 205e is fixed to the first drain valve 210. With this structure, when the lever handle 25a is rotated in the first direction, i.e., the direction of the arrow D1, the top of the first arm 205c moves upward. As a result, the large cleaning bead chain 205e is pulled upward, the first drain valve 210 is pulled up, and the first drain valve 210 is opened.

[0201] The second arm 205d is a slender member fixed in a direction orthogonal to the axis 205b, and extends horizontally toward the front and rear of the flush toilet device 201. One end of a small cleaning bead chain 205f is mounted on the rear end of the second arm 205d, and the other end of the small cleaning bead chain 205f is fixed to the first drain valve 210. On the other hand, a protrusion 205g protruding downward is provided at the front end of the second arm 205d, and the protrusion 205g is located at the float 224 ( Fig.30 ) above and in the vicinity of ).

[0202] With this structure, when the lever handle 205a is rotated in the second direction, i.e., the direction of the arrow D2, the rear end of the second arm 205d moves upward. As a result, the small cleaning bead chain 205f is pulled upward, the first drain valve 210 is pulled up, and the first drain valve 210 is opened. In addition, at the same time, the protrusion 205g at the front end of the second arm 205d moves downward, and the float 224 provided by the ball cock 214 is pressed downward. As a result, the main valve body 220 ( Fig.30 ) is opened, and water starts to be supplied to the hydraulic drive mechanism 216. The structure of the ball cock 214 will be described later.

[0203] As such, when the lever handle 205a is rotated in the direction of the arrow D1, the large cleaning bead chain 205e is pulled upward, the first drain valve 210 is pulled up, and the large cleaning mode is executed. In addition, when the lever handle 205a is rotated in the direction of the arrow D2 opposite to the arrow D1, the small cleaning bead chain 205f is pulled upward, the first drain valve 210 is pulled up, and the small cleaning mode is executed. Here, in the present embodiment, the large cleaning bead chain 205e is configured to be shorter (less loose) than the small cleaning bead chain 205f. Therefore, when the first drain valve 210 is pulled up by the large cleaning bead chain 205e, it is pulled up to a higher position than when it is pulled up by the small cleaning bead chain 205f. As a result, when the large cleaning mode is executed, the first drain valve 210 is opened for a longer time than when the small cleaning mode is executed, and the amount of cleaning water spitted out from the inner edge water spout 202d is also larger.

[0204] Next, refer to Fig.30 The structure of the ball cock 214 will be described. like Fig.30 As shown in FIG. 1 , the ball cock 214 includes a body 218 connected to an inflow pipe 214a and an outflow pipe 214b, a main valve body 220 disposed in the body 218, a valve seat 222 held in place by the main valve body 220, an arm 226 rotated by a float 224, and a pilot valve 228 moved by the rotation of the arm 226. That is, the ball cock 214 includes a float 224 that operates in conjunction with the water level in the washing water tank 204, and is configured to supply washing water to the hydraulic drive mechanism 216 when the float 224 drops to a predetermined position.

[0205] The main body 218 is a member having a connection portion of the inflow pipe 214a at the lower part and a connection portion of the outflow pipe 214b at one side. In addition, a valve seat 222 is formed inside the main body 218, and the valve seat 222 is connected to the outflow pipe 214b connected to the connection portion. In addition, a main valve body 220 is arranged inside the main body 218 to open and close the valve seat 222, so that when the valve seat 222 is opened, the tap water flowing in from the inflow pipe 214a flows through the valve seat 222 and then flows out to the outflow pipe 214b. In addition, the outflow pipe 214b is connected to the hydraulic drive mechanism 216.

[0206] The main valve body 220 is a diaphragm valve body in a substantially disk-shaped manner, and is installed in the main body 218 in a manner that it can be seated and separated from the valve seat 222. In addition, a discharge hole 220a is provided at the peripheral edge of the main valve body 220. In addition, in the main body 218, on the opposite side of the valve seat 222 ( Fig.30In other words, the pressure chamber 218a is defined by the inner wall surface of the main body 218 and the main valve body 220. If the pressure in the pressure chamber 218a increases, the main valve body 220 is pushed against the valve seat 222 by the pressure and is seated on the valve seat 222.

[0207] A pressure passage 218b extends upwardly in communication with the pressure chamber 218a provided in the main body 218, and a pilot valve port 228a is provided at the upper end of the pressure passage 218b. The pilot valve port 228a opens upward and is opened and closed by the pilot valve 228.

[0208] On the other hand, the float 224 is supported by the arm 226, and the arm 226 is rotatably supported by the support shaft 226a. In addition, the pilot valve 228 is connected to the arm 226, and the pilot valve 228 is configured to move in the vertical direction along with the rotation of the arm 226. As a result, the water level in the first tank portion 206a of the washing water tank 204 rises to a predetermined set water level L. 1 In the above state, the float 224 is lifted upward, and the pilot valve 228 moves downward and seats at the pilot valve port 228a, thereby closing it. On the other hand, when the washing water in the first water tank section 206a is discharged and the water level in the first water tank section 206a drops, the float 224 drops downward, the pilot valve 228 moves upward, and the pilot valve port 228a is opened. Therefore, when the water level in the first water tank section 206a is higher than the set water level L 1 When the toilet is on standby for cleaning, the pilot valve port 228a of the main body 218 is in a closed state.

[0209] In addition, the tap water flowing into the main body 218 from the inlet pipe 214a flows into the annular space around the valve seat 222, and from there flows into the pressure chamber 218a after passing through the discharge hole 220a of the main valve body 220. Here, when the pilot valve port 228a is closed by the pilot valve 228, there is no outflow path for the tap water flowing into the pressure chamber 218a from the discharge hole 220a, and the pressure in the pressure chamber 218a rises. In this way, when the pressure in the pressure chamber 218a rises, the main valve body 220 is pressed against the valve seat 222 (towards the valve seat 222) due to the pressure. Fig.30 The valve seat 222 is closed by the main valve body 220.

[0210] On the other hand, when the first drain valve 210 is opened due to the washing operation and the water level in the first tank portion 206a of the washing water tank 204 is lower than the set water level L 1When the float 224 moves downward, the pilot valve 228 moves upward, and the pilot valve port 228a is opened. When the pilot valve port 228a is opened, the water in the pressure chamber 218a flows out from the pilot valve port 228a, and the pressure in the pressure chamber 218a decreases. As a result, the main valve body 220 (towards the valve seat 222) is pulled away from the valve seat 222. Fig.30 The left side in the middle moves, and the valve seat 222 is opened. In this way, when the pilot valve port 228a is opened, the pressure in the pressure chamber 218a does not rise, so the valve seat 222 is in the opened state.

[0211] As described above, the ball cock 214 is configured such that the float 224 moves up and down in conjunction with the water level in the cleaning water tank 204. When the float 224 drops to a predetermined position, the main valve body 220 is opened to supply cleaning water to the hydraulic drive mechanism 216. However, as described above, the protrusion 205g ( Fig.29 ) is located above and near the float 224. Furthermore, by operating the lever handle 205a, when the protrusion 205g moves downward, the float 224 of the ball cock 214 is pressed down. As a result, regardless of the water level in the washing water tank 204, the float 224 is forced to be pressed down, and the main valve body 220 is opened. In this way, when the float 224 is forced to descend by operating the operating part 205, regardless of the water level in the washing water tank 204, the washing water starts to be supplied to the hydraulic drive mechanism 216.

[0212] Next, refer to Fig.31 The structure of the water pressure driving mechanism 216 will be described. The hydraulic drive mechanism 216 is configured to drive the second drain valve 212 using the water supply pressure of the washing water supplied from the water pipe to the washing water tank. Specifically, the hydraulic drive mechanism 216 includes a cylinder 216a into which the water supplied from the ball cock 214 flows; a piston 216b slidably disposed in the cylinder 216a; and a rod 230 protruding from the lower end of the cylinder 216a to drive the second drain valve 212. In addition, a spring 216c is disposed inside the cylinder 216a to apply force to the piston 216b downward, and a seal is installed on the piston 216b to ensure water tightness between the inner wall surface of the cylinder 216a and the piston 216b. In addition, a clutch mechanism 232 is provided at the lower end of the rod 230, and the rod 230 is connected / disconnected with the valve shaft 212a of the second drain valve 212 through the clutch mechanism 232.

[0213] The cylinder 216a is a cylindrical member, and is configured with its axis oriented in the vertical direction, and the piston 216b is slidably received therein. In addition, an outflow pipe 214b extending from the ball cock 214 is connected to the lower end of the cylinder 216a, and the cleaning water flowing out of the ball cock 214 flows into the cylinder 216a. Therefore, the piston 216b in the cylinder 216a is lifted against the force of the spring 216c by the water flowing into the cylinder 216a.

[0214] On the other hand, an outflow hole is provided at the upper end of the cylinder 216a, and the water supply pipe 234 is connected to the inside of the cylinder 216a through the outflow hole. Therefore, when water flows into the cylinder 216a from the outflow pipe 214b connected to the lower part of the cylinder 216a, the piston 216b is lifted upward from the lower part of the cylinder 216a. Thereafter, when the piston 216b is lifted to a position closer to the upper side than the outflow hole, the water that has flowed into the cylinder 216a flows out from the outflow hole to the water supply pipe 234. In addition, the washing water that has flowed into the water supply pipe 234 falls into the second tank portion 206b of the washing water tank 204, and the washing water is supplied to the washing water tank 204.

[0215] The rod 230 is a rod-shaped member connected to the bottom of the piston 216b, and extends from the cylinder 216a through a through hole formed on the bottom surface of the cylinder 216a so as to protrude downward. In addition, the valve shaft 212a of the second drain valve 212 is connected to the lower end of the rod 230 via a clutch mechanism 232, and the rod 230 connects the piston 216b and the second drain valve 212. Therefore, when water flows into the cylinder 216a and the piston 216b is lifted, the rod 230 connected to the piston 216b lifts the second drain valve 212 upward, and the second drain valve 212 is opened.

[0216] In addition, a gap is provided between the rod 230 protruding from the bottom of the cylinder 216a and the inner wall of the through hole of the cylinder 216a, and a part of the water flowing into the cylinder 216a flows out from the gap. The water flowing out from the gap flows into the second water tank portion 206b. Moreover, since the gap is relatively narrow and the flow path resistance is large, even when water flows out from the gap, the pressure in the cylinder 216a rises due to the water flowing into the cylinder 216a from the outflow pipe 214b, and the piston 216b is lifted against the force of the spring 216c.

[0217] The clutch mechanism 232 detachably connects the rod 230 and the second drain valve 212. The clutch mechanism 232 is configured to separate the valve shaft 212a of the second drain valve 212 from the rod 230 when the second drain valve 212 is lifted by a predetermined distance together with the rod 230. In the state where the clutch mechanism 232 is separated, the second drain valve 212 is not linked to the movement of the piston 216b and the upper part of the rod 230, and the second drain valve 212 is lowered as the water level in the second tank portion 206b of the washing water tank 204 drops.

[0218] Next, refer to Figures 32 to 40 The operation of the flush toilet device 1 according to the seventh embodiment of the present invention will be described. Figure 32 to Figure 35 This is a schematic diagram for explaining the operation when the flush toilet device 201 according to the seventh embodiment of the present invention executes the large flushing mode. Fig.36 It is a timing chart showing the action when the flush toilet device 201 according to the seventh embodiment of the present invention executes the large flushing mode. Figure 37 to Figure 39 This is a schematic diagram for explaining the operation when the small flush mode is executed by the flush toilet device 201 involved in the seventh embodiment of the present invention. Fig.40 It is a timing chart showing the action when the small flush mode is executed by the flush toilet device 201 involved in the seventh embodiment of the present invention.

[0219] First, as mentioned above, in the toilet cleaning standby state, if Fig.28 As shown in FIG. 1 , the first drain port 204b and the second drain port 204c of the washing water tank 204 are closed by the first drain valve 210 and the second drain valve 212, respectively. In addition, the second tank portion 206b of the washing water tank 204 is in a full water state (the water level is consistent with the upper end of the partition wall 206). On the other hand, the initial water level L in the first tank portion 206a is 2 Higher than the specified set water level L 1 (About the initial water level L 2 Higher than the set water level L 1 The reason will be described later). As a result, the main body 218 ( Fig.30 )'s pilot valve port 228a is in a closed state, and the valve seat 222 is closed by the main valve body 220.

[0220] Next, in Fig.36 At time t201, when the user rotates the lever handle 205a of the flushing water tank 204 to perform the toilet flushing in the large flushing mode, the large flushing bead chain 205e pulls up the first drain valve 210. Fig.32As shown, the first drain valve 210 is pulled away from the first drain port 204b, and the first drain port 204b is opened. If the first drain port 204b is opened, the washing water stored in the first water tank portion 206a of the washing water tank 204 flows from the first drain port 204b into the inner edge water conduit 202f ( Fig. 27 ) and is discharged from the inner edge water spouting port 202d. The inner edge water spouting from the inner edge water spouting port 202d forms a swirling flow on the waste receiving surface of the bowl portion 202a, and the waste receiving surface is cleaned. In addition, the water level in the first water tank portion 206a drops due to the discharge of the cleaning water.

[0221] The washing water is discharged from the first drain port 204b, whereby the water level in the first water tank portion 206a drops. Fig.36 At time t202, when the water level in the first water tank portion 206a is lower than the set water level L 1 When the float 224 of the ball cock 214 drops, the pilot valve 228 ( Fig.30 ) is opened. As a result, the pressure in the pressure chamber 218a decreases and the main valve body 220 is opened. Fig.33 As shown, water supply to the water pressure drive mechanism 216 begins.

[0222] When washing water is supplied to the hydraulic drive mechanism 216, it flows into the cylinder 216a ( Fig.31 ) in the large cleaning mode against the force of the spring 216c to lift the piston 216b. As a result, the rod 230 connected to the piston 216b pulls up the valve shaft 212a of the second drain valve 212, and the second drain port 204c is opened. That is, the second drain valve 212 is driven and opened by the water supply pressure of the tap water supplied by the ball cock 214. In this way, in the large cleaning mode, at time t201, the first drain valve 210 is opened, and at time t202 after the prescribed time has passed, the second drain valve 212 is opened.

[0223] When the second drain port 204c is opened, the washing water stored in the second tank portion 206b of the washing water tank 204 flows from the second drain port 204c into the jet water conduit 202g ( Fig. 27 ) and is ejected from the jet water spouting port 202e. The inside of the drainage bend pipe 202c is filled with water by the jet water spouting port 202e, inducing a siphon effect. The accumulated water and dirt in the bowl 202a are attracted to the drainage bend pipe 202c by the occurrence of the siphon effect, and are discharged to the sewer pipe (not shown).

[0224] When the second drain valve 212 is pulled up to a predetermined height together with the piston 216b of the hydraulic drive mechanism 216, the clutch mechanism 232 ( Fig.31) separates the valve shaft 212a of the second drain valve 212 from the rod 230. As a result, the second drain valve 212 descends toward the second drain port 204c. Fig.36 At time t203, Fig.34 As shown in FIG. 1 , the second drain valve 212 is located at the second drain port 204c, and the second drain port 204c is closed. As a result, the jet water spouting from the jet water spouting port 202e is stopped. In addition, the flow resistance of the second drain port 204c and the jet water conduit 202g connected thereto is low, so the washing water is spouted from the jet water spouting port 202e at a large flow rate. As a result, the water level in the second water tank portion 206b drops sharply, and the second drain valve 212 is closed earlier than the first drain valve 210.

[0225] exist Fig.34 In the state shown, the main valve body 220 of the ball cock 214 is in an open state, so the cleaning water supplied from the water supply source 207 (tap water pipe) is supplied to the hydraulic drive mechanism 216 through the ball cock 214, and flows into the second water tank section 206b from the water supply pipe 234 connected to the cylinder body 216a. On the other hand, the first drain valve 210 is still in an open state, so the cleaning water in the first water tank section 206a flows out from the first drain port 204b and is discharged from the inner edge water outlet 202d. Fig.36 At time t203, after the jet water spouting is stopped, the washing water spouted from the inner rim water spouting port 202d is used as supplementary water for returning the water level in the bowl portion 202a to the accumulated water level in the standby state.

[0226] Next, in Fig.36 At time t204, when the water level in the second water tank section 206b of the washing water tank 204 drops to the dead water level DWL, Fig.35 As shown, the first drain valve 210 is located at the first drain port 204b and is closed, thereby stopping the rim water spouting from the rim water spouting port 202d.

[0227] Furthermore, even after the first drain valve 210 has been closed, the main valve body 220 of the ball cock 214 remains in an open state, so the cleaning water supplied from the water supply source 207 (tap water pipe) flows from the water supply pipe 234 into the second water tank section 206b of the cleaning water tank 204 via the ball cock 214 and the hydraulic drive mechanism 216. Afterwards, when the water level in the second water tank section 206b is higher than the height of the partition wall 206, the cleaning water flows over the partition wall 206 from the second water tank section 206b into the first water tank section 206a. As a result, the water level in the first water tank section 206a rises. Afterwards, Fig.36 At time t205, when the water level in the first water tank portion 206a rises to the set water level L 1When the float 224 of the ball cock 214 rises, the pilot valve 228 ( Fig.30 ) is closed.

[0228] In this way, when the pilot valve 228 is closed, the cleaning water flowing into the pressure chamber 218a from the drain hole 220a of the main valve body 220 provided in the ball cock 214 cannot flow out, and the pressure in the pressure chamber 218a rises. Fig.36 At time t206, the main valve body 220 is pressed and seated on the valve seat 222 by the pressure in the pressure chamber 218a, and the main valve body 220 is closed. As a result, the water supply from the water supply source 207 to the hydraulic drive mechanism 216 via the ball cock 214 is stopped, and the supply of washing water to the washing water tank 204 is stopped.

[0229] If the water supply to the hydraulic drive mechanism 216 is stopped, the piston 216b ( Fig.31 ) is pressed down by the force of the spring 216c. Along with this, the rod 230 installed on the piston 216b also descends. When the rod 230 descends to a predetermined position, the rod 230 is connected to the valve shaft 212a of the second drain valve 212 again through the clutch mechanism 232. Thus, the toilet cleaning is completed once, and the flush toilet device 201 returns to the state of Fig.28 The toilet cleaning standby state is shown.

[0230] In this way, the water level in the first tank portion 206a of the flushing water tank 204 rises to the set water level L. 1 The moment when the pilot valve 228 is closed ( Fig.36 The time t205) and the time when the main valve body 220 of the ball cock 214 is closed ( Fig.36 Furthermore, during the period from time t205 to t206, since the main valve body 220 is already open, the washing water is continuously supplied. At time t206, when the main valve body 220 is closed, the water level in the first water tank portion 206a becomes higher than the set water level L. 1 The initial water level L 2 .

[0231] As a result, the initial water level L in the first tank portion 206a in the standby state of the flush toilet device 201 is 2 , which is higher than the specified set water level L at which the pilot valve 228 is closed 1 Therefore, in the standby state, when the user operates the lever handle 205a ( Fig.36 At time t201), the water level in the first water tank section 206a is higher than the set water level L 1, the main valve body 220 of the ball cock 214 will not be opened. Afterwards, during the period from time t201 to t202, a predetermined amount of cleaning water is discharged from the first drain port 204b as an inner edge spout, and when the water level in the first water tank portion 206a drops to the set water level L 1 When the pilot valve 228 is opened, the main valve body 220 of the ball cock 214 is also opened. Thus, at time t202, water supply to the hydraulic drive mechanism 216 is started, and the second drain valve 212 is opened by the hydraulic drive mechanism 216 to start jet water spouting.

[0232] Next, refer to Figures 37 to 40 The toilet bowl cleaning in the small cleaning mode is explained. First, in Fig.40 At time t211, when the user rotates the lever handle 205a of the flushing water tank 204 to perform toilet flushing in the small flushing mode, the small flushing bead chain 205f pulls up the first drain valve 210. Fig.37 As shown, the first drain valve 210 is pulled away from the first drain port 204b, and the first drain port 204b is opened. In addition, by rotating the lever handle 205a at the same time, the protruding portion 205g ( Fig.29 ) moves downward, forcing the float 224 of the ball cock 214 to descend.

[0233] If the float 224 drops, the pilot valve 228 ( Fig.30 ) is opened. As a result, the pressure in the pressure chamber 218a decreases and the main valve body 220 is opened. Fig.37 As shown, water starts to be supplied to the water pressure drive mechanism 216. When washing water is supplied to the water pressure drive mechanism 216, the second drain valve 212 is pulled up, and the second drain port 204c is opened.

[0234] In this way, when the small washing mode is executed, the water level in the first tank portion 206a does not drop to the set water level L. 1 The float 224 is forced down to start supplying water to the hydraulic drive mechanism 216. Thus, in the small washing mode, the first drain valve 210 and the second drain valve 212 are substantially opened at the same time, that is, after the first drain valve 210 is opened, the second drain valve 212 is opened after a predetermined time ( Fig.36 The second drain valve 212 is opened before the time t201 to t202. Fig.40 At time t211, the inner edge water spouting and the jet water spouting start almost simultaneously.

[0235] When the second drain valve 212 is pulled up to a predetermined height by the hydraulic drive mechanism 216, the clutch mechanism 232 ( Fig.31) separates the valve shaft 212a of the second drain valve 212 from the rod 230. As a result, the second drain valve 212 descends toward the second drain port 204c. Fig.40 At time t212, Fig.38 As shown in FIG. 1 , the second drain valve 212 is located at the second drain port 204c, and the second drain port 204c is closed. As a result, the jet water spouting from the jet water spouting port 202e is stopped. As described above, the washing water is spouted at a large flow rate from the jet water spouting port 202e, so the water level in the second water tank portion 206b drops sharply, and the second drain valve 212 is closed earlier than the first drain valve 210.

[0236] exist Fig.38 In the state shown, the main valve body 220 of the ball cock 214 is in an open state, so the washing water supplied from the water supply source 207 (tap water pipe) is supplied to the hydraulic drive mechanism 216 through the ball cock 214, and flows into the second water tank section 206b from the water supply pipe 234 connected to the cylinder 216a. On the other hand, the first drain valve 210 is still in an open state, so the washing water in the first water tank section 206a flows out from the first drain port 204b and is discharged from the inner edge water outlet 202d.

[0237] Next, in Fig.40 At time t213, when the water level in the second water tank section 206b of the washing water tank 204 drops to the dead water level DWL, Fig.39 As shown, the first drain valve 210 is located at the first drain port 204b and is closed, thereby stopping the rim water spouting from the rim water spouting port 202d.

[0238] Here, when executing the small cleaning mode Fig.40 At time t211, the height of the first drain valve 210 pulled up by the small cleaning bead chain 205f of the operating unit 205 is lower than the height of the first drain valve 210 pulled up in the large cleaning mode as described above. Therefore, in the small cleaning mode, the period from when the first drain valve 210 is opened to when it is closed ( Fig.40 The opening period of the first drain valve 210 in the large cleaning mode ( Fig.36 Thus, the amount of washing water ejected from the inner edge water spouting port 202d in the small washing mode is less than the amount of washing water ejected from the inner edge water spouting port 202d in the large washing mode. Fig.39 The dead water level DWL in (small cleaning mode) is higher than Fig.35 Dead water level DWL in (large cleaning mode).

[0239] Moreover, in Fig.40At time t213, after the inner edge water spouting is stopped, at time t214, the water level in the first tank portion 206a of the washing water tank 204 rises to the set water level L 1 , the pilot valve 228 is closed. Moreover, at time t215, the main valve body 220 of the ball cock 214 is closed, and the flush toilet device 201 returns to the standby state. After time t213, the action of the flush toilet device 201 returning to the standby state is the same as that of the large flushing mode, so the description is omitted.

[0240] Furthermore, in the present embodiment, although the first drain valve 210 and the second drain valve 212 are opened almost simultaneously in the small cleaning mode, as a modified example, the present invention may also be configured such that after the first drain valve 210 is opened, the second drain valve 212 is opened after a predetermined time ( Fig.36 The second drain valve 212 is opened before the time t201 to t202. At this time, for example, the protrusion 205g ( Fig.29 ) and the float 224 of the ball cock 214, an appropriate gap is provided. Thus, when the shaft 205b is rotated in the direction of the arrow D2, the first drain valve 210 is pulled up by the small cleaning bead chain 205f, and then the float 224 is forced down by the protrusion 205g after a slight delay (before a prescribed time has passed), and water starts to be supplied to the water pressure drive mechanism 216, and the second drain valve 212 is pulled up.

[0241] According to the flush toilet device 201 of the seventh embodiment of the present invention, the discharge and stop of the cleaning water from the inner edge water spouting port 202d are switched by the first drain valve 210, and the discharge and stop of the cleaning water from the jet water spouting port 202e are switched by the second drain valve 212 ( Fig.28 ), so that all the washing water for washing is supplied from the washing water tank 204, and the timing of the inner edge water spouting and the jet water spouting can be freely and independently set. Thus, the bowl 202a of the flush toilet body 202 can be effectively cleaned by the washing water stored in the washing water tank 204. In addition, according to the flush toilet device 201 of the seventh embodiment of the present invention, when the large washing mode ( Fig.36 ), after the first drain valve 210 is opened, the second drain valve 212 is opened after a predetermined time, thereby supplying washing water to the bowl 202a. When the small washing mode ( Fig.40 ), the first drain valve 210 and the second drain valve 212 are substantially opened simultaneously. Therefore, in the small cleaning mode, the amount of inner edge water spouting before the start of the less necessary jet water spouting can be reduced, and the amount of cleaning water can be suppressed while ensuring sufficient cleaning performance.

[0242] In addition, according to the flush toilet device 201 of this embodiment, the second drain valve 212 is opened by the hydraulic drive mechanism 216, so the drain valve is not pulled up by electrical power such as a motor, and after the inner rim water spouting starts in the large cleaning mode, the jet water spouting can be started after a predetermined time has passed. Thus, the bowl 202a can be effectively cleaned while suppressing the amount of cleaning water.

[0243] Furthermore, according to the flush toilet device 201 of this embodiment, when the large flushing mode is executed, the float 224 is lowered along with the drop of the water level in the flushing water tank 204, thereby starting to supply flushing water to the hydraulic drive mechanism 216, and thus starting to spout water after the water level in the flushing water tank 204 drops. On the other hand, when the small flushing mode is executed, the float 224 is forced to drop and starts to supply flushing water to the hydraulic drive mechanism 216, and thus starts to spout water without waiting for the drop of the water level in the flushing water tank 204. Thus, the flushing sequence of the large flushing mode and the small flushing mode can be set without using electrical control.

[0244] In addition, according to the flush toilet device 201 of this embodiment, when the lever handle 205a is rotated in the first direction, the large cleaning mode is executed, and when the lever handle 205a is rotated in the second direction, the small cleaning mode is executed. Therefore, the execution of the large cleaning mode and the small cleaning mode can be controlled by a simple mechanism.

[0245] Next, refer to Fig.41 and Fig.42 A flush toilet device according to an eighth embodiment of the present invention will be described. The structure of the operating unit for executing the large flushing mode and the small flushing mode of the flush toilet device of this embodiment is different from that of the above-mentioned embodiment 7. Therefore, only the contents of the eighth embodiment of the present invention that are different from the seventh embodiment will be described below, and the same structures are marked with the same symbols as the seventh embodiment and the description is omitted.

[0246] Fig.41 It is a cross-sectional view showing a schematic structure of a flush water tank provided in a flush toilet device according to an eighth embodiment of the present invention. Fig.42 This is a schematic diagram showing the schematic structure of an operating unit provided in a flush water tank of a flush toilet device according to an eighth embodiment of the present invention.

[0247] like Fig.41As shown, the flush water tank 204 provided by the flush toilet device of this embodiment has a first drain valve 210, a second drain valve 212, a ball cock 214, and a hydraulic drive mechanism 216. In addition, similarly to the seventh embodiment described above, a first drain port 204b opened and closed by the first drain valve 210 and a second drain port 204c opened and closed by the second drain valve 212 are provided on the bottom surface of the flush water tank 204. Furthermore, a partition wall 206 is provided in the flush water tank 204 to partition the inside of the flush water tank 204 into a first tank portion 206a provided with the first drain port 204b and a second tank portion 206b provided with the second drain port 204c.

[0248] In addition, in this embodiment, the first drain valve 210 is connected to an operating unit ( Fig.42 The second drain valve 212 includes a large cleaning bead chain 240a and a small cleaning bead chain 240b (not shown in the figure), and a small cleaning bead chain 240c is connected to the second drain valve 212.

[0249] Next, if Fig.42 As shown, the operating unit 240 includes: a first button 242a for large cleaning; a second button 242b for small cleaning; a lever 244 pressed by these buttons; a shaft 246 mounted on the lever 244; and a first arm 248a and a second arm 248b mounted on the shaft 246.

[0250] The first button 242a and the second button 242b are buttons provided on the washing water tank 204, and the user can execute the large washing mode or the small washing mode by pressing these buttons. In addition, these first button 242a and the second button 242b are supported by the washing water tank 204 so as to be movable in the up-down direction by the user's pressing. Moreover, these first button 242a and the second button 242b are configured to return to the original state by a spring (not shown) after being pressed by the user. Moreover, only the upper end of the first button 242a and the second button 242b is exposed from the upper side of the washing water tank 204, and the lower part is covered by the cover (not shown) on the upper side of the washing water tank 204.

[0251] The lever 244 is a rod-shaped member that is substantially horizontal and extends in the front-rear direction of the flush toilet apparatus, and is disposed below the first button 242a and the second button 242b.

[0252] The shaft 246 is a rod-shaped member extending horizontally in the width direction of the flush toilet device 201 in the upper part of the flush water tank 204. The shaft 246 is rotatably supported by the flush water tank 204, and the lever 244 is fixed to the middle part in a manner orthogonal to the shaft 246. And, if the first button 242a or the second button 242b is pressed, the shaft 246 rotates together with the lever 244. That is, the first button 242a is arranged above the end of the rear side of the lever 244, and if the first button 242a is pressed, the shaft 246 fixed to the lever 244 rotates in the direction of the arrow D1. On the other hand, the second button 242b is arranged above the end of the front side of the lever 244, and if the second button 242b is pressed, the shaft 246 fixed to the lever 244 rotates in the direction of the arrow D2.

[0253] The first arm 248a is an elongated member fixed in a direction perpendicular to the axis 246, and horizontally extends toward the front and rear of the flush toilet device 201. One end of a large cleaning bead chain 240a is mounted on the top end of the front side of the first arm 248a, and the other end of the large cleaning bead chain 240a is fixed to the first drain valve 210. On the other hand, one end of a small cleaning bead chain 240b is mounted on the top end of the rear side of the first arm 248a, and the other end of the small cleaning bead chain 240b is also fixed to the first drain valve 210.

[0254] The second arm 248b is an elongated member fixed in a direction perpendicular to the axis 246, and extends horizontally toward the rear of the flush toilet device 201. One end of a small cleaning bead chain 240c is mounted on the rear end of the second arm 248b, and the other end of the small cleaning bead chain 240c is fixed to the second drain valve 212.

[0255] With this structure, when the first button 242a for large cleaning is pressed and the shaft 246 rotates in the first direction, i.e., the direction of arrow D1, the top end of the first arm 248a moves upward, thereby pulling the bead chain 240a for large cleaning upward, lifting the first drain valve 210, and opening the first drain valve 210.

[0256] On the other hand, if the second button 242b for small cleaning is pressed and the shaft 246 rotates in the second direction, i.e., the direction of the arrow D2, the rear ends of the first arm 248a and the second arm 248b move upward. As a result, the small cleaning bead chain 240b is pulled upward, the first drain valve 210 is pulled up, and the first drain valve 210 is opened. In addition, at the same time, the small cleaning bead chain 240c installed at the rear end of the second arm 248b is also pulled upward, the second drain valve 212 is pulled up, and the second drain valve 212 is opened.

[0257] Like this, if the first button 242a is pressed and the shaft 246 rotates in the direction of the arrow D1, the large cleaning bead chain 240a is pulled upward, the first drain valve 210 is pulled up and the large cleaning mode is performed. In addition, if the second button 242b is pressed and the shaft 246 rotates in the direction of the arrow D2 opposite to the arrow D1, the small cleaning bead chains 240b and 240c are pulled upward, the first drain valve 210 and the second drain valve 212 are pulled up and the small cleaning mode is performed. Here, in this embodiment, the large cleaning bead chain 240a is configured to be shorter (less loose) than the small cleaning bead chain 240b. Therefore, when the first drain valve 210 is pulled up by the large cleaning bead chain 240a, it is pulled up to a higher position than when it is pulled up by the small cleaning bead chain 240b. As a result, when the large washing mode is executed, the time for which the first drain valve 210 is opened is longer than when the small washing mode is executed, and the amount of washing water spouted from the rim water spouting port 202d is also larger.

[0258] Next, the operation of the flush toilet device according to the eighth embodiment of the present invention will be described. First, when the user presses the first button 242a for large cleaning, the bead chain 240a for large cleaning pulls up the first drain valve 210, and the inner edge water spouting from the inner edge water spouting port 202d is performed. The first drain valve 210 is pulled up, and the cleaning water is discharged. As a result, when the water level in the first water tank portion 206a increases from the initial water level L 2 Drop to the set water level L 1 When the float 224 of the ball cock 214 drops, the pilot valve 228 is opened.

[0259] As a result, the main valve body 220 of the ball cock 214 is opened, and water starts to be supplied to the hydraulic drive mechanism 216. When water starts to be supplied to the hydraulic drive mechanism 216, the second drain valve 212 is opened by the hydraulic drive mechanism 216, and water is ejected from the jet water spouting port 202e. That is, in the large cleaning mode started by pressing the first button 242a, after the inner rim water spouting from the inner rim water spouting port 202d, after a predetermined time (equivalent to the time in the seventh embodiment) has passed, the water is ejected from the inner rim water spouting port 202d. Fig.36 In the large cleaning mode, the action after the start of the jet water spouting is the same as that of the seventh embodiment described above, and therefore the description thereof is omitted.

[0260] Next, when the user presses the second button 242b for small cleaning, the beads 240b and 240c for small cleaning are pulled almost simultaneously, and the first drain valve 210 and the second drain valve 212 are pulled up. As a result, the inner edge water spouting from the inner edge water spouting port 202d and the jet water spouting from the jet water spouting port 202e are substantially started at the same time. That is, when the small cleaning mode is executed, according to the operation of the operating unit 240, the second drain valve 212 is forced to open and the jet water spouting begins. Next, when the water level in the first water tank portion 206a rises from the initial water level L 2 Drop to the set water level L 1 When the float 224 of the ball cock 214 drops, the pilot valve 228 is opened.

[0261] As a result, the main valve body 220 of the ball cock 214 is opened, and water starts to be supplied to the water pressure drive mechanism 216. That is, in the small cleaning mode, after the second drain valve 212 is pulled up by the small cleaning bead chain 240c, water starts to be supplied to the water pressure drive mechanism 216. The cleaning water supplied to the water pressure drive mechanism 216 flows into the second water tank portion 206b after passing through the water supply pipe 234. In addition, in the small cleaning mode, the action after the water supply to the water pressure drive mechanism 216 starts is the same as that of the seventh embodiment described above, so the description is omitted.

[0262] Furthermore, in the present embodiment, although the first drain valve 210 and the second drain valve 212 are opened almost simultaneously in the small cleaning mode, as a modified example, the present invention can also be configured such that after the first drain valve 210 is opened, the second drain valve 212 is opened before a predetermined time has passed. In this case, for example, the small cleaning bead chain 240c is configured to be longer (loose) than the small cleaning bead chain 240b. Thus, when the shaft 246 is rotated in the direction of the arrow D2, the first drain valve 210 is pulled up by the small cleaning bead chain 240b, and then the second drain valve 212 is pulled up by the small cleaning bead chain 240c after a slight delay (before a predetermined time has passed).

[0263] According to the flush toilet device of the eighth embodiment of the present invention, when the large flushing mode is executed, the float 224 drops along with the drop of the water level in the first tank portion 206a of the flushing water tank 204, thereby starting to supply flushing water to the hydraulic drive mechanism 216, and thus starting to spout water after the water level in the flushing water tank 204 drops. On the other hand, when the small flushing mode is executed, the second drain valve 212 is forcibly opened according to the operation of the operating unit 240, thereby starting to spout water. Thus, the flushing sequence of the large flushing mode and the small flushing mode can be set without using electrical control.

[0264] In addition, according to the flush toilet device of this embodiment, when the first button 242a is pressed, the large flushing mode is executed, and when the second button 242b is pressed, the small flushing mode is executed. Therefore, the execution of the large flushing mode and the small flushing mode can be controlled by a simple mechanism.

[0265] The above is a description of the embodiment of the present invention, but various changes can be added to the above embodiment. In particular, in the above embodiment, after the inner rim water spouting is started, the jet water spouting is delayed and started, but the present invention can also be configured so that the inner rim water spouting is started after the jet water spouting is started. In this case, the present invention can be configured in such a way that the first drain valve for switching the spouting and stopping of the washing water from the inner rim water spouting port is opened by the hydraulic drive mechanism.

[0266] In addition, in the above-mentioned embodiment, although the first drain port and the second drain port of the washing water tank are separately provided, these drain ports may also be configured to overlap each other when viewed from above. In this case, for example, the present invention may be configured such that the first drain port and the second drain port are provided in a concentric circle shape, the inner drain port is opened and closed by a circular drain valve, and the outer drain port is opened and closed by a ring-shaped drain valve.

[0267] In the fourth embodiment described above, the height of the float of each drain valve is changed, in the fifth embodiment, the flow path resistance of the flow path extending from each drain port is changed, and in the sixth embodiment, the volume of the first water tank portion and the second water tank portion is changed, thereby configuring the first drain valve to be closed after the second drain valve is closed. In contrast, the present invention may also be configured such that the first drain valve is closed after the second drain valve is closed by appropriately combining the structures of the above-mentioned embodiments.

[0268] Moreover, in the seventh embodiment described above, the lever handle is provided as the operating portion, and in the eighth embodiment, the first and second buttons are provided as the operating portion, but the present invention can also be configured so that the large cleaning mode and the small cleaning mode can be selectively executed through any other operating portion. In addition, the first and second buttons can also be applied to the seventh embodiment of the present invention, and the lever handle can be applied to the eighth embodiment of the present invention.

[0269] Moreover, in the seventh and eighth embodiments described above, a partition wall is provided in the washing water tank, and a first drain port and a second drain port are provided in the first tank portion and the second tank portion, respectively, but the partition wall of the washing water tank may be omitted. In this case, the first drain port and the second drain port may also be configured to overlap each other when viewed from above. In this case, for example, the present invention may also be configured such that the first drain port and the second drain port are provided in a concentric circle shape, the inner drain port is opened and closed by a circular drain valve, and the outer drain port is opened and closed by a ring-shaped drain valve.

Claims

1. A flush toilet device, which is cleaned by washing water stored in a washing water tank, characterized in that: The invention comprises: a flush toilet body, which has a bowl and a drainage elbow pipe extending from the lower part of the bowl; A washing water tank is arranged at the rear of the flush toilet body and stores washing water for washing the bowl of the flush toilet body; a first drain valve for opening and closing a first drain port provided in the washing water tank, thereby switching on and off the discharge of washing water from an inner edge water discharge port provided in an upper edge portion of the bowl; a second drain valve for opening and closing a second drain port provided in the washing water tank, thereby switching on and off the discharge of washing water from the jet water discharge port provided at the lower portion of the bowl; and a water pressure driving mechanism for opening the first drain valve or the second drain valve by utilizing the water supply pressure of the washing water supplied from the water pipe to the washing water tank.

2. The flush toilet device according to claim 1, characterized in that: The invention further comprises a delay mechanism, and when the bowl is washed, the delay mechanism causes one of the first drain valve and the second drain valve to open more slowly than the other.

3. The flush toilet device according to claim 2, characterized in that: The water pressure driving mechanism is configured to open the second drain valve.

4. The flush toilet device according to claim 2, characterized in that: The delay mechanism includes a ball cock that operates in conjunction with the water level in the cleaning water tank, and when a float of the ball cock descends to a predetermined position, the cleaning water is supplied to the hydraulic drive mechanism.

5. The flush toilet device according to claim 2, characterized in that: The delay mechanism comprises: a ball cock with a float; a small water tank, which is arranged in the cleaning water tank in a manner to surround the float and has a discharge hole; and a check valve float, which is configured to open the discharge hole of the small water tank when the water level in the cleaning water tank drops to a specified water level, and if the water level in the small water tank drops to the specified water level, the cleaning water is supplied to the water pressure drive mechanism.

6. The flush toilet device according to claim 2, characterized in that: The delay mechanism comprises: a first ball cock, which starts to supply water into the cleaning water tank when the water level in the cleaning water tank drops to a specified first water level; and a second ball cock, which starts to supply cleaning water to the water pressure driving mechanism when the water level in the cleaning water tank drops to a specified second water level lower than the first water level.

7. The flush toilet device according to claim 2, characterized in that: The flush water tank is provided with a partition wall that separates a first tank portion provided with the first drain port from a second tank portion provided with the second drain port.

8. The flush toilet device according to claim 7, characterized in that: The first drain valve is configured to be closed in conjunction with the drop in the water level in the first water tank portion, and the second drain valve is configured to be closed in conjunction with the drop in the water level in the second water tank portion, and the pressure loss of the rim water conduit connecting the first drain port and the rim water spouting port is set to be greater than the pressure loss of the jet water conduit connecting the second drain port and the jet water spouting port, thereby causing the water level in the second water tank portion to drop earlier than the water level in the first water tank portion, and causing the second drain valve to be closed earlier than the first drain valve.

9. The flush toilet device according to claim 7, characterized in that: The first drain valve is configured to be closed in conjunction with the drop in the water level in the first water tank portion, and the second drain valve is configured to be closed in conjunction with the drop in the water level in the second water tank portion, so that the volume of the first water tank portion is formed to be larger than the volume of the second water tank portion, thereby causing the water level in the second water tank portion to drop earlier than the water level in the first water tank portion, and causing the second drain valve to be closed earlier than the first drain valve.

10. The flush toilet device according to claim 7, characterized in that: The partition wall of the flush water tank is provided with a small hole which connects the first tank portion and the second tank portion at a predetermined water level.

11. The flush toilet device according to claim 7, characterized in that: The apparatus further comprises an operation unit capable of selectively executing a large-washing mode and a small-washing mode in which the amount of washing water supplied to the bowl is less than that in the large-washing mode. When the large cleaning mode is executed, after the first drain valve is opened, the second drain valve is opened after a specified time has passed, thereby supplying cleaning water to the basin. When the small cleaning mode is executed, the first drain valve and the second drain valve are opened at the same time, or after the first drain valve is opened, the second drain valve is opened before the specified time has passed.

12. The flush toilet device according to claim 11, characterized in that: The operation unit is configured to open the second drain valve after opening the first drain valve when a large-cleaning mode is executed, and to open the first drain valve and the second drain valve substantially simultaneously when a small-cleaning mode is executed.

13. The flush toilet device according to claim 11, characterized in that: The water pressure driving mechanism opens the second drain valve using the water supply pressure of the flushing water supplied from the water pipe to the flushing water tank.

14. The flush toilet device according to claim 13, characterized in that: It also has a ball cock, which has a float that moves in conjunction with the water level in the cleaning water tank. The ball cock is constructed so that when the float drops to a specified position, cleaning water is supplied to the water pressure drive mechanism. When a large cleaning mode is performed by the operating unit, the float drops as the water level in the cleaning water tank drops, thereby starting to supply cleaning water to the water pressure drive mechanism. When a small cleaning mode is performed, the float is forced to drop according to the operation of the operating unit, thereby starting to supply cleaning water to the water pressure drive mechanism.

15. The flush toilet device according to claim 13, characterized in that: It also has a ball cock, which has a float that moves in conjunction with the water level in the cleaning water tank. The ball cock is constructed so that when the float drops to a specified position, cleaning water is supplied to the water pressure driving mechanism. When the large cleaning mode is executed by the operating unit, the float drops as the water level in the cleaning water tank drops, thereby starting to supply cleaning water to the water pressure driving mechanism. When the small cleaning mode is executed, before the float drops to the specified position, the second drain valve is forcibly opened according to the operation of the operating unit.

16. The flush toilet device according to claim 12 or 14, characterized in that: The operation unit includes a handle, and when the handle is rotated in a first direction, a large cleaning mode is executed, and when the handle is rotated in a second direction opposite to the first direction, a small cleaning mode is executed.

17. The flush toilet device according to claim 12 or 14, characterized in that: The operation unit includes a first button and a second button. When the first button is pressed, a large cleaning mode is executed, and when the second button is pressed, a small cleaning mode is executed.

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