JP7434790B2 - drain valve device - Google Patents

Description

TECHNICAL FIELD The disclosed embodiments relate to drain valve devices.

2. Description of the Related Art Conventionally, there has been known a drain valve device that is disposed inside a wash water tank that stores wash water supplied to a toilet bowl and controls opening and closing of a drain port formed on the bottom surface of the wash water tank. The drain valve device includes, for example, a drain valve body that opens and closes a drain port, and a float that moves up and down in conjunction with the water level in the wash water tank.

In such a drain valve device, when the drain valve body is pulled up during a cleaning operation, the engaging protrusion provided on the drain valve body engages with the engaging portion provided on the float, thereby increasing the height of the drain valve body. The cleaning water is discharged from the drain port. Thereafter, as the water level decreases, the float descends, thereby disengaging the engagement protrusion from the engagement portion, lowering the drain valve body, and closing the drain port (for example, see Patent Document 1).

Japanese Patent Application Publication No. 2013-104271

By the way, there are areas where the dead water level, which determines the amount of water discharged from the wash water tank, varies greatly, but as wash water tanks have become low silhouette in recent years, there is a desire to set the dead water level even in areas where there is large variation. It's increasing.

However, in the conventional drain valve device, the setting range of the dead water level is narrow, and the dead water level cannot be set in a region with large variations as described above.

One aspect of the embodiment has been made in view of the above, and aims to provide a drain valve device that can widen the setting range of the dead water level.

A drain valve device according to one aspect of the embodiment includes a drain valve body that has a valve body main shaft that extends upward, and opens and closes a drain port of a wash water tank that stores wash water in response to lifting of the valve body main shaft. and a float portion that moves up and down in conjunction with the water level in the wash water tank, and is capable of engaging with an engaging protrusion provided on the main shaft of the valve body, and the engaging protrusion is capable of engaging with the engaging protrusion provided on the main shaft of the valve body. an engaging part that can be released from engagement with the protrusion; the float part stores washing water in the washing water tank; The float is housed in a water tank, and includes a float that moves in conjunction with the water level in the water tank when descending, and a height adjustment section that can adjust the initial height of the float.

According to such a configuration, the setting range of the dead water level can be expanded by adjusting the initial height of the float. Furthermore, by making it possible to discharge the wash water stored in the water tank, the setting range of the dead water level can be expanded. In this way, by adjusting the initial height of the float and making it possible to discharge the wash water in the water storage tank, it is possible to adjust the dead water level in areas where it is not stable even if you try to set the dead water level (the dead water level varies greatly). This allows you to expand the setting range to areas where it was previously impossible to set.

Further, in the above-mentioned drain valve device, the height adjustment part is a shaft body that supports the float and has a threaded side surface, and the initial height of the float is adjusted by screwing with the float. Adjust.

According to such a configuration, the initial height of the float can be adjusted with a simple configuration.

Furthermore, in the above-described drain valve device, the adjustment window can adjust the amount of wash water discharged from the water tank by changing the open area.

According to such a configuration, by adjusting the discharge amount of washing water stored in the water storage tank, the setting range of the dead water level can be set in detail, and as a result, the setting range of the dead water level can be further expanded. can.

Further, in the above-described drain valve device, the engaging portion has the rotating shaft at a position farther from the valve body main axis than the engaging position with the engaging protrusion, and the water level of the washing water tank is When the water level is above a predetermined water level, the rotational movement is regulated by coming into contact with the float from the side, and when the water level in the wash water tank is below the predetermined water level, the rotational movement is restricted as the float descends. Permissible.

According to such a configuration, it is possible to prevent the engagement between the engagement projection and the engagement portion from being easily released while suppressing the influence of the frictional force generated between the engagement projection and the engagement portion. Can be done. Therefore, the timing at which the engagement between the engagement protrusion and the engagement portion is released is less likely to deviate, and the timing at which the drain valve element closes the drain port is less likely to vary. As a result, variations in the dead water level can be suppressed.

According to one aspect of the embodiment, the setting range of the dead water level can be expanded.

FIG. 1 is a schematic perspective view showing an example of a toilet device according to an embodiment. FIG. 2 is a schematic cross-sectional view showing an example of the wash water tank according to the embodiment. FIG. 3 is a schematic cross-sectional perspective view showing the drain valve device according to the embodiment. FIG. 4 is a schematic perspective view showing the float section. FIG. 5 is an explanatory diagram of the operation of the float section during large cleaning. FIG. 6 is an explanatory diagram of the operation of the height adjustment section. FIG. 7 is an explanatory diagram of the operation of the adjustment window. FIG. 8 is an explanatory diagram of the setting range of the dead water level by the drain valve device according to the embodiment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a drain valve device disclosed in the present application will be described in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments described below.

<Toilet equipment>
First, the toilet device 1 will be explained with reference to FIG. FIG. 1 is a schematic perspective view showing an example of a toilet device 1 according to an embodiment.

Note that each figure including FIG. 1 shows a three-dimensional orthogonal coordinate system including a Z-axis whose positive direction is vertically upward (upward). Below, the positive direction of the X-axis is defined as the left, the negative direction of the X-axis is defined as the right, the positive direction of the Y-axis is defined as the front, and the negative direction of the Y-axis is defined as the rear. is sometimes referred to as the front-back direction, and the Z-axis direction is sometimes referred to as the vertical direction.

As shown in FIG. 1, the toilet device 1 includes a toilet main body 2 and a flush water tank 4. The toilet main body 2 includes a bowl part 20 for receiving waste, a rim 22 overhanging the upper edge of the bowl part 20 inwardly, and a first spout 24 for discharging wash water supplied from the tank part 4. , a reservoir part 26 in which the reservoir water is accumulated up to the reservoir water W0, and a drain trap pipe 27 communicating with the reservoir water 26.

The toilet main body 2 includes a second spout 28 above the water reservoir surface W0 of the bowl portion 20 for discharging the flushing water supplied from the tank portion 4. The cleaning water discharged from the first spout 24 flows down the bowl part 20 while swirling, and cleans the bowl part 20. The cleaning water discharged from the second spout 28 causes the water in the water reservoir 26 to swirl in the vertical direction, thereby generating a swirling flow.

The cleaning water tank 4 stores cleaning water and includes a water storage tank 40 in which a drain port 400 (see FIG. 3) communicating with the bowl portion 20 is formed on the bottom surface, and a cleaning water tank 40 placed above the water storage tank 40. A tank lid 42 is provided. The wash water tank lid 42 is equipped with a push-button type manual operation device 420 (described later) on the top surface, and when the user presses the manual operation device 420, the wash water stored in the wash water tank 4 is transferred to the bowl portion 20. can be supplied to

<Washing water tank>
Next, the cleaning water tank 4 will be explained with reference to FIG. 2. FIG. 2 is a schematic cross-sectional view showing an example of the wash water tank 4 according to the embodiment. The wash water tank 4 includes a water storage tank 40, a water supply device 6, a drain valve device 8, and a manual operation device 420.

The water supply device 6 includes a water supply pipe 60, a float 62, a water supply valve 64, and a refill pipe 66. The water supply pipe 60 is connected to a water supply source (not shown) such as a water pipe and extends upward from the bottom surface of the water storage tank 40, and a water supply valve 64 is attached to the upper end of the water supply pipe 60. The opening and closing of the water supply valve 64 is controlled by a float 62 that moves up and down in accordance with the water level in the water storage tank 40 .

The water supply pipe 60 also includes a water outlet (not shown) at the lower end on the outer peripheral side. When the water supply valve 64 opens, the water spout discharges the wash water supplied from the water supply pipe 60 into the wash water tank 4, and when the water supply valve 64 closes, the water stops.

The downstream end of the refill pipe 66 is located at an upper end opening 800 of an overflow pipe 80 of the drain valve device 8, which will be described later. A portion of the refill pipe 66 is fixed at a predetermined location within the overflow pipe 80 or the wash water tank 4. A part of the flush water flowing out from the refill pipe 66 flows into the overflow pipe 80 and is supplied into the bowl portion 20 of the toilet main body 2 as makeup water.

The manual operation device 420 includes a large cleaning button 422, a small cleaning button 424, a large cleaning rod member 426, and a small cleaning rod member 428. The large flush button 422 mechanically commands the start of a cleaning operation in the large flush mode of the toilet device 1 (see FIG. 1). The small flush button 424 mechanically commands the start of a cleaning operation in the small flush mode of the toilet device 1 .

The large cleaning rod member 426 is fixed to the lower surface side of the large cleaning button 422 and extends downward. The small cleaning rod member 428 is fixed to the lower surface side of the small cleaning button 424 and extends downward.

When the user presses the large-cleaning button 422, the large-cleaning rod member 426 is pushed down, and the tip of the large-cleaning rod member 426 pushes down the large-cleaning operating portion 823 of the drain valve device 8. Further, when the user presses the small wash button 424, the small wash rod member 428 is pushed down, and the tip of the small wash rod member 428 pushes down the small wash operation section 822 of the drain valve device 8.

In this way, when the user presses the large wash button 422 or the small wash button 424, the drain valve device 8 can be driven according to the washing operation in either the large wash mode or the small wash mode.

<Drain valve device>
Next, the drain valve device 8 will be explained with reference to FIGS. 3 to 7. FIG. 3 is a schematic cross-sectional perspective view showing the drain valve device 8 according to the embodiment. FIG. 4 is a schematic perspective view showing the float section 890. FIG. 5 is an explanatory diagram of the operation of the float section 890 during large cleaning. FIG. 6 is an explanatory diagram of the operation of the height adjustment section 891. FIG. 7 is an explanatory diagram of the operation of the adjustment window 901.

As shown in FIG. 3, the drain valve device 8 includes a casing 82 that forms the external appearance of the drain valve device 8, a valve body portion 84 that is disposed inside the casing 82 and opens and closes the drain port 400, and a valve body portion 84 that opens and closes the drain port 400. A valve body lifting mechanism 86 is provided.

The casing 82 includes a cylindrical body 820 forming a side surface of the casing 82 , a lid 821 formed to cover an opening at the top of the body 820 , and an overflow pipe 80 . The body portion 820 contracts from the upstream side to the downstream side between the valve seat 824 on which the valve body portion 84 is seated, the drain tube portion 826 that is inserted into the drain port 400, and the valve seat 824 and the drain tube portion 826. A reduced diameter portion 828 is provided.

The valve body portion 84 includes a valve body main shaft 840 that extends upward, and a drain valve body 842 that opens and closes the drain port 400 of the tank portion 4 that stores cleaning water in accordance with the lifting of the valve body main shaft 840. Drain valve body 842 closes drain port 400 by seating on valve seat 824 . Further, the valve body main shaft 840 includes a rectangular parallelepiped-shaped flat plate member 844 extending laterally at the periphery of the upper end opening, and an attachment hole 846 is formed near the center of the flat plate member 844.

The valve body lifting mechanism 86 includes a first link and a second link that is rotatably attached to one end of the first link and moves upward according to the amount of rotation of the first link. When the large washing operation section 823 or the small washing operation section 822 is pushed down by the large washing rod member 426 or the small washing rod member 428 (see FIG. 2), the first link is centered around a first rotating shaft 898, which will be described later. , and the second link is pulled up.

The lower end of the second link is inserted into the mounting hole of the flat plate member and then changed direction, so that when the second link is pulled up, it engages with the lower surface of the flat plate member and the valve body The entire section 84 can be pulled up.

In the standby state before the user operates the manual operating device 420, the lower end of the second link connected to the first link is not engaged with the flat plate member, and the drain valve body 842 is connected to the drain port 400. It is in a closed state.

When the user presses the large-cleaning button 422 and the large-cleaning rod member 426 is pressed down, the large-cleaning rod member 426 is pushed down, and the large-cleaning operating section 823 of the casing 82 moves downward. When the large cleaning operation section 823 moves downward, the first link rotates by a relatively large amount of rotation, and the second link is pulled upward by a relatively large amount of rotation.

Then, the lower end of the second link engages with the flat plate member, and pulls up the flat plate member by a relatively large amount of movement. When the flat plate member is pulled up, the drain valve body 842 is pulled up, the drain port 400 is opened, and the wash water in the wash water tank 4 is supplied to the bowl part 20 (see FIG. 1). This is the cleaning operation in the large cleaning mode.

Further, when the user presses the small cleaning button 424, the small cleaning rod member 428 is pushed down. By pushing down the small cleaning rod member 428, the small cleaning operation section 822 of the casing 82 moves downward. When the small wash operating portion 822 moves downward, the first link rotates by a relatively small amount of rotation, and the second link is pulled upward by a relatively small amount of movement.

Then, the lower end of the second link engages with the flat plate member, and the flat plate member is pulled up. When the flat plate member is pulled up, the drain valve body 842 is pulled up, the drain port 400 is opened, and the wash water in the wash water tank 4 is supplied to the bowl part 20. This is the cleaning operation in the small cleaning mode.

Furthermore, a rib 822a is provided on the peripheral edge of the small washing operation section 822 so that the small washing rod member 428 does not protrude outside the small washing operation section 822. A rib 823a is also provided on the periphery of the large-cleaning operation part 823 so that the large-cleaning rod member 426 does not protrude outside the large-cleaning operation part 823.

The configuration of the drain valve device 8 will be explained in more detail. As shown in FIG. 3, the drain valve device 8 includes a casing 82 that forms the appearance of the drain valve device 8, a valve body portion 84 that opens and closes the drain port 400, and a valve body lifting mechanism 86 that pulls up the valve body portion 84. , a small wash float mechanism 88 disposed in the casing 82, a large wash float part (float part) 89, and a large wash engagement part (engaging part) 892, which constitute a large wash float mechanism.

The casing 82 includes an overflow pipe 80 having an upper end opening 800 that communicates with the inside of the wash water tank 4 and a lower end opening 802 that communicates with the reduced diameter portion 828 . The overflow pipe 80 discharges the wash water from the lower end opening 802 when the wash water in the water storage tank 40 exceeds a water level corresponding to the upper end opening 800 of the overflow pipe 80 .

The lid portion 821 of the casing 82 includes a small wash operation section 822 and a large wash operation section 823. When the small wash button 424 (see FIG. 2) on the wash water tank lid 42 is pressed, the small wash operation section 822 rotates the first link by a relatively small amount of rotation. Furthermore, when the large wash button 422 (see FIG. 2) on the wash water tank lid 42 is pressed, the large wash operation section 823 rotates the first link by a relatively large amount of rotation.

The valve body main shaft 840 of the valve body portion 84 includes a small flush engagement projection 847 that engages with a minor flush engagement portion 884 described later, and a large flush engagement projection 848 that engages with a large flush engagement portion 892. .

The small wash float mechanism 88 includes a float (referred to as a small wash float) 880, a float support shaft 882, and a small wash engagement portion 884. The small wash float 880 is made of resin, for example, and lowers together with the water level in the water storage tank 40 when the water level in the water storage tank 40 drops to a water level (dead water level) at which a predetermined amount of small wash water is discharged. The float support shaft 882 is provided to extend in the vertical direction and supports the small wash float 880.

The small-cleaning engagement portion 884 is formed to be able to engage with a small-cleaning engagement protrusion 847 provided on the valve body main shaft 840 . When the user presses the small wash button 424 and the washing operation is executed in the small wash mode described above, the valve body portion 84 is lifted and the small wash engagement protrusion 847 provided on the valve body main shaft 840 engages in the small wash engagement. It engages with the mating portion 884.

When the small flush engaging protrusion 847 engages with the small flush engaging portion 884, the valve body portion 84 is held and the drain port 400 is maintained in an open state. Thereafter, when the wash water is discharged from the drain port 400 and the water level in the water storage tank 40 decreases, the small wash float 880 descends, and the engagement between the small wash engaging protrusion 847 and the small wash engaging portion 884 is released. Ru. When the engagement between the small wash engaging projection 847 and the small wash engaging portion 884 is released, the valve body portion 84 descends and closes the drain port 400.

The large-cleaning float section 89 constituting the large-cleaning float mechanism includes a float (referred to as a large-cleaning float) 890, a cam pressing section 890a (see FIG. 4), a height adjustment section 891, and a water reservoir 900. The large cleaning float 890 is made of resin, for example, and is a float that moves up and down in conjunction with the water level in the water storage tank 40 . As shown in FIG. 4, the large cleaning float 890 is also a so-called water weight that stores cleaning water, and its descending time can be changed by changing its own weight.

The cam pressing portion 890a is a portion that comes into contact with a cam 896 of a large cleaning engaging portion 892, which will be described later, when the large cleaning float 890 rises. The cam pressing portion 890a is formed separately from the large cleaning float 890a and is separable from the large cleaning float 890.

The height adjustment section 891 is a support shaft that supports the large cleaning float 890. The height adjustment part 891 is made of resin, for example, and moves up and down together with the large cleaning float 890 in conjunction with the water level in the cleaning water tank 4 . Further, the height adjustment section 891 is capable of adjusting the initial height of the large cleaning float 890 according to the attachment position of the large cleaning float 890.

The height adjustment part 891 is a shaft body whose side peripheral surface is threaded, and when the large cleaning float 890 is screwed onto the shaft body, the attachment position of the large cleaning float 890 is changed. Thereby, the initial height of the large cleaning float 890 can be adjusted. The height adjustment of the large cleaning float 890 by the height adjustment section 891 will be described later using FIG. 6.

The water tank 900 accommodates a large cleaning float 890. When the water level in the water storage tank 40 drops to the dead water level at which a predetermined amount of large washing water is discharged, the large cleaning float 891 housed in the water storage tank 900 moves in conjunction with the water level in the water storage tank 900 when lowering. Further, the water tank 900 has an adjustment window 901 that can discharge washing water from inside the water tank 900. The adjustment window 901 is formed on the side surface of the water tank 900. The adjustment window 901 will be described later using FIG. 7.

When the user presses the large cleaning button 422 and the cleaning operation is executed in the large cleaning mode described above, the large cleaning engaging portion 892 engages with the large cleaning engaging protrusion 848 provided on the outer periphery of the valve body main shaft 840. match. Note that the operation of the large-cleaning float section 89 in the large-cleaning mode will be described later using FIG. 5.

The large-cleaning engagement portion 892 that constitutes the large-cleaning float mechanism includes a cam 896 and a rotating shaft 898. The cam 896 includes a first contact portion 894a that contacts the large cleaning float 890 from the side, and a second contact portion 894b that contacts the large cleaning engagement protrusion 848 (see FIG. 4). The rotation shaft 898 includes a cam rotation shaft 898a that rotatably supports the cam 894.

Here, the operation of the large cleaning float mechanism in the large cleaning mode will be explained. When the deep cleaning operation is performed, the valve body portion 84 that closes the drain port 400 is pulled upward, as shown in FIG. 5(a). At this time, buoyancy F is acting on the large cleaning float 890, but the cam 896 prevents it from rising any further.

As shown in FIG. 5(b), when the water level WL1 in the wash water tank 4 decreases, the valve body portion 84 descends in conjunction with the decrease in the water level WL1, and engages with the cam 896 at a predetermined height. match. At this time, since the rotation of the cam 986 is restricted by the large cleaning float 890 on which the buoyant force F is acting, the valve body portion 84 is maintained at a predetermined height.

As shown in FIG. 5(c), when the water level WL1 in the wash water tank 4 further decreases, the valve body part 84 tries to descend with its own weight M1, and the dead weight M2 of the large wash float 890 increases with the buoyancy F. gradually becomes larger.

As shown in FIG. 5(d), when the water level WL1 in the wash water tank 4 further decreases, in addition to the dead weight M1 of the valve body 84, the water level WL2 in the water tank 900 increases. is discharged and lowered, the large cleaning float 890 descends, the restriction is released, and the cam 896 rotates.

As shown in FIG. 5(e), the valve body portion 84 descends as the water level WL1 in the wash water tank 4 decreases to close the drain port 400 again. The water level WL1 in the wash water tank 4 at this time becomes the dead water level DWL for determining the amount of wash water to be discharged. On the other hand, the large cleaning float 890 descends in conjunction with the water level WL2 in the water tank 900, and stops at a preset height that is the initial height in the water tank 900.

As shown in FIG. 6, the height adjustment section 891 changes the attachment position (height) of the large cleaning float 890 when the large cleaning float 890 is screwed together. Thereby, the height adjustment section 891 can adjust the height of the large cleaning float 890 within the height H range. In this way, the initial height of the large cleaning float 890 can be adjusted with a simple configuration.

Further, as shown in FIG. 7, the adjustment window 901 of the water tank 900 changes the open area of the opening 901a by, for example, sliding in the left-right direction. This allows the adjustment window 901 to adjust the amount of wash water discharged from the water tank 900.

The adjustment window 901 may adjust the amount of cleaning water discharged in a fully open state as shown in FIG. 7(a) and in a fully closed state with the door 901b closed as shown in FIG. The amount of cleaning water to be discharged may be adjusted by opening the opening 901a. In this way, by adjusting the discharge amount of the wash water stored in the water storage tank 900, the setting range of the dead water level DWL (see FIG. 5) can be set finely. As a result, the setting range of the dead water level DWL can be further expanded.

According to the drain valve device 8 according to the embodiment described above, the setting range of the dead water level DWL can be expanded by adjusting the initial height of the large cleaning float 890. Furthermore, by making it possible to discharge the wash water stored in the water tank 900, the setting range of the dead water level DWL can be expanded. In this way, by adjusting the initial height of the large cleaning float 890 and by making it possible to discharge the cleaning water in the water tank 900, as shown in FIG. The setting range can now be expanded to region A (in other words, a region where the dead water level DWL cannot be set) (where the variation in the water level DWL is large).

Further, the large-cleaning engagement portion 892 has a first rotating shaft 898 at a position farther from the valve body main shaft 840 than the engagement position with the large-cleaning engagement protrusion 848, and furthermore, the water level WL of the washing water tank 4 is When the water level is above a predetermined water level, the rotational movement is regulated by coming into contact with the large wash float 890 from the side, so that when the water level WL in the wash water tank 4 is below the predetermined water level, the large wash float 890 is lowered. Rotational motion is allowed accordingly.

If the first rotating shaft 898 is provided at a position closer to the valve body main shaft 840 than the engagement position between the cam 896 and the large-cleaning engagement protrusion 848, the engagement between the cam 896 and the large-cleaning engagement protrusion 848 would be When the engagement between the cam 896 and the large-cleaning engagement protrusion 848 is released, the cam 896 rotates while slightly lifting the large-cleaning engagement protrusion 848. A large frictional force will be generated.

In contrast, in the drain valve device 8 according to the embodiment described above, the first rotation shaft 898 of the cam 896 is provided at a position farther from the valve body main shaft 840 than the engagement position between the cam 896 and the large cleaning engagement protrusion 848. Therefore, when the engagement between the cam 896 and the large-cleaning engagement protrusion 848 is released, the cam 896 rotates away from the large-cleaning engagement protrusion 848 without lifting the large-cleaning engagement protrusion 848. Therefore, compared to the case where the first rotating shaft 898 of the cam 896 is provided at a position closer to the valve body main shaft 840 than the engagement position between the cam 896 and the large-cleaning engagement protrusion 848, the large-cleaning engagement is The influence of frictional force generated between the protrusion 848 and the cam 896 can be suppressed.

On the other hand, if the first rotating shaft 898 of the cam 896 is provided at a position farther from the valve body main shaft 840 than the engagement position between the cam 896 and the large cleaning engagement protrusion 848, the large cleaning Since the cam 896 tends to rotate in a direction in which the mating protrusion 848 and the cam 896 are disengaged, there is a possibility that the engagement between the large cleaning engagement protrusion 848 and the cam 896 may be easily disengaged.

In contrast, in the drain valve device 8 according to the embodiment described above, when the water level WL of the wash water tank 4 is higher than the predetermined water level, the cam 896 comes into contact with the large wash float 890 from the side, and the cam 896 comes into contact with the large wash float 890 from the side. Since the rotational movement is regulated by the large-cleaning float 890, it is possible to prevent the large-cleaning engagement protrusion 848 from easily disengaging from the cam 896.

This makes it possible to suppress the influence of the frictional force generated between the large-cleaning engagement protrusion 848 and the cam 896, and to prevent the engagement between the large-cleaning engagement protrusion 848 and the cam 896 from being easily disengaged. can. Therefore, the timing at which the large cleaning engagement protrusion 848 and the cam 896 are disengaged is less likely to deviate, and the timing at which the drain valve body 842 closes the drain port 400 is less likely to vary. As a result, variations in the dead water level DWL can be suppressed.

Further advantages and modifications can be easily deduced by those skilled in the art. Therefore, the broader aspects of the invention are not limited to the specific details and representative embodiments shown and described above. Accordingly, various changes may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.

1 Toilet device 4 Wash water tank 8 Drain valve device 840 Valve body main shaft 842 Drain valve body 89 Float part (large flush float part)
890 float (large cleaning float)
891 Height adjustment part 900 Water tank 901 Adjustment window 892 Engagement part (large cleaning engagement part)
848 Engagement protrusion (large cleaning engagement protrusion)
898 Rotation axis (first rotation axis)

Claims (3)

a drain valve body having a valve body main shaft extending upward and opening and closing a drain port of a wash water tank that stores wash water in accordance with the lifting of the valve body main shaft;
a float section provided in the wash water tank;
an engaging portion that is capable of engaging with an engaging protrusion provided on the main shaft of the valve body, and that is capable of being released from engagement with the engaging protrusion by rotational movement about a rotating shaft;
The float part is
a water storage bucket that stores cleaning water in the cleaning water tank and has an adjustment window that can discharge the stored cleaning water;
a float accommodated in the water tank and linked to the water level in the water tank when lowering;
and a height adjustment part that can adjust the initial height of the float,
The engaging portion has the rotating shaft at a position farther from the main axis of the valve body than the engaging position with the engaging protrusion, and when the water level of the wash water tank is higher than a predetermined water level, A drain valve, wherein the rotational movement is regulated by contacting the float from the side, and when the water level of the wash water tank is below a predetermined water level, the rotational movement is allowed as the float descends. Device. 2. The height adjustment section is a shaft body that supports the float and has a threaded side circumferential surface, and adjusts the initial height of the float by screwing with the float. Drain valve device. The drain valve device according to claim 1 or 2, wherein the adjustment window can adjust the amount of wash water discharged from the water tank by changing the open area.

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