JP7172590B2 - drain valve device - Google Patents

Description

The disclosed embodiments relate to drain valve arrangements.

2. Description of the Related Art Conventionally, there has been known a drain valve device that is arranged inside a flush water tank that stores flush water to be supplied to a toilet and that controls opening and closing of a drain port provided on the bottom surface of the flush water tank.

The drain valve device includes 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. When the drain valve body is lifted up with the cleaning operation, the engagement protrusion provided on the drain valve body engages with the engagement portion provided on the float, thereby maintaining the height of the drain valve body and the drain port. Wash water is drained from the After that, as the water level drops, the float lowers, disengaging the engaging protrusion from the engaging portion, lowering the drain valve body, and closing the drain port (see Patent Document 1).

JP 2013-104271 A

However, in the conventional technology described above, when the engagement between the engaging protrusion and the engaging portion is released, the engagement is released due to the frictional force generated between the engaging protrusion and the engaging portion. There is a risk that the timing will be off. If the disengagement timing deviates, the timing at which the drain valve body closes the drain port varies, resulting in variations in the dead water level of the wash water tank. If there is variation in the dead water level of the flush water tank, there is a risk of, for example, poor flushing of the toilet bowl.

One aspect of the embodiments has been made in view of the above, and an object thereof is to provide a drain valve device capable of suppressing variations in the dead water level.

A drain valve device according to an aspect of an embodiment includes a drain valve body that includes an upwardly extending valve body shaft and opens and closes a drain port of a wash water tank that stores wash water in response to lifting of the valve body shaft. , a float that moves up and down in conjunction with the water level of the wash water tank, and a float that can be engaged with an engagement projection provided on the valve body main shaft, and engages with the engagement projection by rotating about a rotation shaft. an engaging portion that can be disengaged, the engaging portion having the rotating shaft at a position farther from the valve body main shaft than the engagement position with the engaging protrusion; When the water level in the tank is higher than a predetermined water level, the rotating movement is restricted by abutting the float from the side. Said rotational movement is permitted.

If the rotating shaft of the engaging portion is provided at a position closer to the valve body main shaft than the engaging position between the engaging portion and the engaging projection, the engagement between the engaging portion and the engaging projection is released. Since the engaging portion rotates while slightly lifting the engaging projection, a relatively large frictional force is generated when the engagement between the engaging portion and the engaging projection is released. . On the other hand, in the drain valve device according to one aspect of the embodiment, since the rotating shaft of the engaging portion is provided at a position farther from the valve body main shaft than the engaging position between the engaging portion and the engaging protrusion, the engagement When the portion is disengaged from the engaging projection, the engaging portion rotates away from the engaging projection without lifting the engaging projection. For this reason, compared to the case where the rotation axis of the engaging portion is provided at a position closer to the valve body main shaft than the engaging position between the engaging portion and the engaging projection, the distance between the engaging projection and the engaging portion is reduced. It is possible to suppress the influence of the frictional force generated between them.

On the other hand, when the rotation shaft of the engaging portion is provided at a position farther from the main shaft of the valve body than the engaging position between the engaging portion and the engaging projection, the weight of the drain valve causes the engagement projection and the engaging portion to be displaced. Since the engaging portion tends to rotate in the disengagement direction, there is a risk that the engagement between the engaging projection and the engaging portion may be easily disengaged. On the other hand, in the drain valve device according to one aspect of the embodiment, when the water level in the wash water tank is higher than the predetermined water level, the engaging portion abuts the float from the side and the engaging portion is moved by the float. Since the rotational movement is regulated, it is possible to prevent the engaging projection from being easily disengaged from the engaging portion.

By the above operation, it is possible to prevent the engagement between the engaging projection and the engaging portion from being easily released while suppressing the influence of the frictional force generated between the engaging projection and the engaging portion. Therefore, the timing at which the engaging protrusion and the engaging portion are disengaged is less likely to be shifted, and the timing at which the drain valve body closes the drain port is less likely to vary. As a result, variations in the dead water level of wash water can be suppressed.

Further, the contact position between the engaging portion and the float is farther from the valve body main shaft than the engaging position between the engaging projection and the engaging portion and is further from the valve body main shaft than the rotating shaft. is located near the

For example, when the contact position between the engaging portion and the float is farther from the valve body main shaft than the rotating shaft, the frictional force between the float and the engaging portion due to the rotational movement of the engaging portion is generated upward with respect to the float. do. When an upward frictional force is applied to the float, it inhibits the float from descending. Therefore, the timing at which the float descends varies depending on the magnitude of the frictional force. As a result, the timing of releasing the engagement between the engaging portion and the engaging projection also varies, resulting in variations in the dead water level of the wash water.

In the drain valve device according to one aspect of the embodiment, the frictional force between the float and the engaging portion due to the rotation of the engaging portion does not occur upward with respect to the float. The timing of releasing the engagement between the joining portion and the engaging projection is less likely to fluctuate. As a result, variations in the dead water level of wash water can be suppressed.

Further, in the drain valve device according to one aspect of the embodiment, in the initial position of the engaging portion before the valve body shaft is pulled up, an upward force is exerted from the engagement projection as the valve body shaft is pulled up. An initial position return portion is provided in which the engaging portion returns to the initial position when rotated by receiving the force. As a result, after the valve body main shaft is pulled up, the engagement portion can quickly return to the initial position where it can be engaged with the engagement protrusion before the valve body main shaft comes down.

Further, the initial position return portion is a part of the engaging portion supported from below by the float at a position farther from the valve body main shaft than the rotating shaft in the initial position, and the engaging portion is and, when an upward force is applied from the engaging protrusion as the main shaft of the valve body is lifted, the float rotates around the rotation axis while pushing down the float against the buoyancy, and then rises due to the buoyancy. It rotates around the rotation axis and returns to the initial position by the upward force received from the .

As a result, the engaging portion can be returned to the initial position with a simple configuration, so that the drain valve device can be made compact.

The engaging portion includes a first contact member that contacts the float from the side, and a second contact member that is separate from the first contact member and contacts the engaging projection. Prepare. As a result, when the second contact member receives an upward force from the engaging projection as the valve body main shaft is pulled up, the first contact member does not rotate around the rotation axis, and only the second contact member is rotated. Since the first contact member rotates, the space for rotating the first contact member is not required, and the drain valve device can be made compact.

The rotating shaft includes a first rotating shaft that rotatably supports the first contact member, and a first rotating shaft that is provided on the first contact member and that is closer to the valve body main shaft than the first rotating shaft. and a second rotating shaft that rotatably supports the two contact members.

As a result, the time required for the second contact member to disengage from the engagement projection is shortened, and the influence of friction generated between the second contact member and the engagement projection is reduced. As a result, variations in the dead water level of wash water can be suppressed.

According to one aspect of the embodiment, it is possible to provide a drain valve device capable of suppressing variations in the dead water level.

FIG. 1 is a diagram showing a toilet device according to an embodiment. FIG. 2 is a cross-sectional view of the wash water tank according to the embodiment. FIG. 3 is a diagram showing the drain valve device in a state where the valve body portion according to the embodiment is lowered. FIG. 4 is a diagram showing the drain valve device in a state in which the valve body portion according to the embodiment is pulled up. FIG. 5 is a cross-sectional view of the drain valve device according to the embodiment. FIG. 6 is a schematic diagram showing the drain valve device before draining according to the embodiment. FIG. 7 is a schematic diagram showing the drain valve device during draining according to the embodiment. FIG. 8 is a schematic diagram showing the drain valve device during draining according to the embodiment. FIG. 9 is a schematic diagram showing the drain valve device during draining according to the embodiment. FIG. 10 is a schematic diagram showing the drain valve device during draining according to the embodiment. FIG. 11 is a schematic diagram showing the drain valve device during draining according to the embodiment. FIG. 12 is a schematic diagram showing the drain valve device during draining according to the embodiment. FIG. 13 is a schematic diagram showing the drain valve device after draining according to the embodiment. FIG. 14 is a schematic diagram showing the drain valve device after draining according to the embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to an accompanying drawing, embodiment of the drain-valve apparatus which this application discloses is described in detail. In addition, this invention is not limited by embodiment shown below.

First, the overall configuration of a toilet apparatus equipped with a drain valve device according to an embodiment will be described with reference to FIG. FIG. 1 is a diagram showing a toilet device 1 according to an embodiment.

As shown in FIG. 1 , the toilet device 1 includes a toilet body 2 and a tank portion 4 . The toilet body 2 includes a bowl portion 20 for receiving waste, a rim 22 overhanging the upper edge of the bowl portion 20 inward, a first water outlet 24 for discharging flush water supplied from the tank portion 4, and a reservoir. A water storage part 26 in which water is stored up to a water surface W0 and a drainage trap pipeline 27 communicating with the water storage part 26 are provided.

Further, the toilet body 2 is provided with a second water outlet 28 at a position above the pooled water surface W<b>0 of the bowl section 20 for discharging flush water supplied from the tank section 4 . The wash water spouted from the first spout 24 flows down while swirling in the bowl portion 20 to wash the bowl portion 20 . The wash water spouted from the second spout 28 swirls the pooled water in the pooled water portion 26 in the vertical direction to generate a swirling flow.

The tank portion 4 includes a water storage tank 40 that stores wash water and has a drain port 400 (see FIG. 3, etc.) that communicates with the bowl portion on the bottom, and a wash water tank lid that is placed above the water storage tank 40. 42. The wash water tank lid 42 has a push button type manual operation device 420 on the upper surface. 20 can be supplied. A detailed drainage mechanism in the tank section 4 will be described later.

Next, the configuration inside the tank portion 4 will be described with reference to FIG. FIG. 2 is a cross-sectional view of the tank portion 4 according to the embodiment. As shown in FIG. 2 , the tank section 4 includes 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. A water supply valve 64 is attached to the upper end of the water supply pipe 60. The water supply valve 64 is controlled to open and close by a float 62 that moves up and down according to the water level in the water storage tank 40 .

In addition, the water supply pipe 60 has a spout (not shown) at the lower end on the outer peripheral side. The water spout spouts washing water supplied from the water supply pipe 60 into the tank portion 4 when the water supply valve 64 is opened, and stops the water when the water supply valve 64 is closed.

The refill pipe 66 has its downstream end positioned at an upper end opening 800 of the overflow pipe 80 of the drain valve device 8, which will be described later, and a part of the refill pipe 66 is fixed to the overflow pipe 80 or a predetermined location in the tank section 4. . A portion of the flush water flowing out of the refill pipe 66 flows into the overflow pipe 80 and is supplied to the bowl portion 20 of the toilet body 2 as make-up water.

The manual operation device 420 includes a large flush button 422 for mechanically instructing the start of the flushing operation in the large flushing mode of the toilet apparatus 1, and a small flushing button 422 for mechanically instructing the start of the flushing operation in the small flush mode of the toilet apparatus 1. It has a button 424, a large washing rod member 426 fixed to the bottom side of the large washing button 422 and extending downward, and a small washing rod member 428 fixed to the bottom side of the small washing button 424 and extending downward. there is

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 operation portion 823 of the drain valve device 8 . Also, 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 portion 822 of the drain valve device 8 . 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.

Next, the configuration of the drain valve device 8 and the lifting mechanism for the valve body portion 84 provided in the drain valve device 8 will be described with reference to FIGS. 3 and 4. FIG. FIG. 3 is a view showing the drain valve device 8 with the valve body portion 84 according to the embodiment lowered, and FIG. 4 is a view showing the drain valve device 8 with the valve body portion 84 according to the embodiment pulled up. 8 is a diagram showing FIG.

First, the drain valve device 8 comprises a casing 82 that forms the appearance of the drain valve device 8, a valve body portion 84 that is arranged in the casing 82 and opens and closes the drain port 400, and a valve body lifting mechanism that lifts the valve body portion 84. 86.

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 (see FIG. 2). . The body portion 820 includes a valve seat 824 on which the valve body portion 84 is seated, a drain tube portion 826 inserted into the drain port 400, and contracted from the upstream side to the downstream side between the valve seat 824 and the drain tube portion 826. and a reduced diameter portion 828 having a diameter.

The valve body portion 84 includes a valve body main shaft 840 extending upward, and a drain valve body 842 that opens and closes the drain port 400 of the tank portion 4 that stores wash water as the valve body main shaft 840 is pulled up. The drain valve body 842 closes the drain port 400 by sitting on the valve seat 824 . In addition, the valve body main shaft 840 has a rectangular parallelepiped flat plate member 844 extending sideways on the periphery of the upper end opening, and a mounting hole 846 is provided near the center of the flat plate member 844 .

The valve body lifting mechanism 86 includes a first link 860 and a second link 862 that is rotatably attached to one end of the first link 860 and moves upward according to the amount of rotation of the first link 860 . When the large cleaning operation portion 823 or the small cleaning operation portion 822 is pushed downward by the large cleaning rod member 426 or the small cleaning rod member 428, the first link 860 rotates to a first rotating shaft 898 (see FIG. 5, etc.) to be described later. ), and the second link 862 is pulled up.

After the lower end of the second link 862 is inserted into the mounting hole 846 of the plate member 844, it is oriented so as to engage the lower surface of the plate member 844 when the second link 862 is pulled up. Then, the entire valve body portion 84 can be pulled up.

As shown in FIG. 3, in the standby state before the user operates the manual operating device 420, the lower end of the second link 862 connected to the first link 860 is not engaged with the flat plate member 844. The drain valve body 842 is in a state in which the drain port 400 is closed.

FIG. 4 is a cross-sectional view of the drain valve device 8 in a state where the user presses the large cleaning button 422 and the large cleaning rod member 426 is pushed down. By pushing down the large cleaning rod member 426 (not shown here), the large cleaning operation part 823 (not shown here) of the casing 82 is lowered. When the large cleaning operation portion 823 moves downward, the first link 860 rotates by a relatively large amount of rotation, and the second link 862 is lifted upward by a relatively large amount of movement. Then, the lower end of the second link 862 engages with the flat plate member 844 and pulls up the flat plate member 844 by a relatively large amount of movement. By lifting the flat plate member 844 , the drain valve body 842 is lifted, the drain port 400 is opened, and the wash water in the tank section 4 is supplied to the bowl section 20 . This is the cleaning operation in the large cleaning mode.

Also, although not shown, when the user presses the small wash button 424, the small wash rod member 428 is pushed down. By pushing down the small cleaning rod member 428, the small cleaning operating portion 822 of the casing 82 is lowered. When the small cleaning operation part 822 moves downward, the first link 860 rotates by a relatively small amount of rotation, and the second link 862 is lifted upward by a relatively small amount of movement. Then, the lower end of the second link 862 is engaged with the flat plate member 844, and the flat plate member 844 is pulled up. By lifting the flat plate member 844 , the drain valve body 842 is lifted, the drain port 400 is opened, and the wash water in the tank portion 4 is supplied to the bowl portion 20 . This is the cleaning operation in the small cleaning mode.

Next, a specific configuration of the drain valve device 8 will be described with reference to FIG. FIG. 5 is a cross-sectional view of the drain valve device 8. As shown in FIG.

As shown in FIG. 5, the drain valve device 8 includes a casing 82 that forms the appearance of the drain valve device 8 described above, a valve body portion 84 that opens and closes the drain port 400, and a valve body lifting mechanism that lifts the valve body portion 84. In addition to 86, a small wash float mechanism 88 and a large wash float mechanism 89 are provided within the casing 82. The casing 82 also includes an overflow pipe 80 having an upper end opening 800 communicating with the inside of the tank portion 4 and a lower end opening 802 communicating with the reduced diameter portion 828 . The overflow pipe 80 can discharge the wash water from the lower end opening 802 when the wash water in the water storage tank 40 exceeds the water level corresponding to the upper end opening 800 of the overflow pipe 80 .

A lid portion 821 of the casing 82 includes a small cleaning operation portion 822 and a large cleaning operation portion 823 . When the small wash button 424 of the wash water tank lid 42 is pressed, the small wash operation unit 822 rotates the first link 860 by a relatively small rotation amount. Also, when the large wash button 422 of the wash water tank cover 42 is pressed, the large wash operation unit 823 rotates the first link 860 by a relatively large amount of rotation.

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

The small wash float mechanism 88 includes a small wash float 880 , a float support shaft 882 and a small wash engaging portion 884 . The small wash float 880 descends 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) that discharges a predetermined amount of small wash water. The float support shaft 882 extends vertically and supports the small wash float 880 .

The small cleaning engaging portion 884 is formed so as to be able to engage with a small cleaning engaging projection 847 provided on the valve body main shaft 840 . When the user presses the small cleaning button 424 and the cleaning operation is executed in the small cleaning mode described above, the valve body portion 84 is lifted, and the small cleaning engaging protrusion 847 provided on the valve body main shaft 840 engages in the small cleaning. It engages joint 884 . By engaging the small cleaning engaging protrusion 847 with the small cleaning engaging portion 884, the valve body portion 84 is held and the drain port 400 is maintained in an open state. After that, when the wash water is discharged from the drain port 400 and the water level in the water storage tank 40 is lowered, the small wash float 880 descends and the small wash engaging protrusion 847 and the small wash engaging portion 884 are disengaged. be. When the engagement between the small cleaning engagement projection 847 and the small cleaning engagement portion 884 is released, the valve body portion 84 descends to close the drain port 400 .

The large wash float mechanism 89 includes a large wash float 890 and a large wash engaging portion 892 . The large wash float 890 is a float that moves up and down in conjunction with the water level in the water storage tank 40. It descends with the water level of

When the user presses the large cleaning button 422 to perform the cleaning operation 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. A detailed mechanism of the large cleaning engaging portion 892 in the large cleaning mode will be described later.

The large cleaning engaging portion 892 is separate from the first contacting member 894 that contacts the large cleaning float 890 from the side, and contacts the large cleaning engaging protrusion 848. and a second contact member 896 .

Furthermore, the drain valve device 8 includes a first rotating shaft 898 that rotatably supports the first contact member 894 . The first contact member 894 also includes a second rotating shaft 899 that rotatably supports the second contact member 896 .

6 to 14 for the detailed mechanism of the large wash engagement portion 892 before draining the cleansing water from the tank portion 4, at the time of draining the cleansing water, and at the time of water supply to the tank portion 4 in the large cleansing mode. will be described with reference to 6 to 14 are schematic diagrams showing the drain valve device 8 during draining according to the embodiment.

FIG. 6 shows a state in which the valve body main shaft 840 closes the drain port 400 of the tank portion 4 . The first contact member 894 contacts the side surface of the large washing float 890 , and the second contact member 896 contacts the upper surface of the large washing float 890 . The position of the large cleaning engaging portion 892 before the valve body main shaft 840 is pulled up is defined as the initial position.

As shown in FIG. 7, when the user presses the large wash button 422, the valve body portion 84 is pulled upward. At this time, the large cleaning engagement protrusion 848 of the valve body main shaft 840 pushes the second contact member 896 upward from below. The second contact member 896 rotates clockwise around the second rotating shaft 899 and pushes down the large washing float 890 .

Since the drain valve device 8 according to the embodiment includes the first contact member 894 and the second contact member 896 separately, the valve body portion 84 pushes the second contact member 896 upward. Even if it rotates, the first contact member 894 does not rotate. As a result, the drain valve device 8 can be made compact without requiring a space for the rotation of the first contact member 894 .

Next, the large washing engaging portion 892, which is the initial position returning portion, rotates around the second rotating shaft 899 while pushing down the large washing float 890 against the buoyancy, and then rises due to the buoyancy as shown in FIG. The upward force received from the large washing float 890 causes it to rotate counterclockwise around the second rotating shaft 899 and return to its initial position as shown in FIG.

As described above, when the drain valve device 8 according to the embodiment rotates in the above-described initial position as the valve body main shaft 840 is pulled up, the large cleaning engagement protrusion 848 receives an upward force and rotates. The joining portion 892 has an initial position return portion for returning to the initial position. As a result, the second contact member 896 of the large cleaning engaging portion 892 is in the initial position where it can engage with the large cleaning engaging projection 848 after the valve body main shaft 840 is pulled up and before the valve body main shaft 840 descends. can quickly return to

The initial position return portion of the drain valve device 8 according to the embodiment is a portion 897 of the large cleaning engaging portion 892 supported from below by the large cleaning float 890 at a position farther from the valve body main shaft 840 than the second rotating shaft 899. is. As a result, the large cleaning engaging portion 892 can be returned to the initial position with a simple configuration, so the drain valve device 8 can be made compact.

Note that the initial position return portion does not necessarily need to be a part of the large cleaning engaging portion 892, and may be, for example, a spring (resin spring, leaf spring, torsion spring) or weight. When the spring described above is used as the initial position returning portion, one end of the spring abuts against the second contact member 896 and the other end is held so as not to release the force the spring receives from the second contact member 896 .

Subsequently, as shown in FIG. 10, when the valve body portion 84 is lowered, the second abutment member 896 engages with the large cleaning engaging protrusion 848, thereby opening the drain port 400. maintained in When the valve body portion 84 is in a state of opening the drain port 400 , wash water is discharged from the tank portion 4 and supplied to the bowl portion 20 . In FIG. 10, the water level in the water storage tank 40 is represented by WL.

Here, when the water level in the water storage tank 40 is higher than a predetermined water level, the large cleaning engaging portion 892 engaged with the large cleaning engaging projection 848 abuts the large cleaning float 890 from the side. Rotational motion is restricted. That is, at the initial position, the first contact member 894 contacts the side surface of the large washing float 890 from the side, so that the large washing float 890 restricts the counterclockwise rotation. At the initial position, the second contact member 896 is supported from below by the first contact member 894 . Therefore, the counterclockwise rotation of the second contact member 896 engaged with the large cleaning engaging projection 848 is restricted by the first contact member 894 . The predetermined water level is defined between the full water level and the dead water level of the water storage tank 40 .

Thereafter, the wash water in the tank portion 4 is discharged, and as the water level drops, the large wash float 890 moves downward. As shown in FIG. 11, when the large cleaning float 890 moves downward, the first contact member 894 slides on the inclined surface 891 formed on the large cleaning float 890 .

As shown in FIG. 12, when the water level in the water storage tank 40 is below a predetermined level, as the large washing float 890 descends, the state of contact with the large washing float 890 is released and the rotating operation is permitted. be. That is, when the large wash float 890 drops as the water level in the water storage tank 40 drops, the first contact member 894 begins to slide on the inclined surface 891 formed on the large wash float 890, and the large wash engaging projections Counterclockwise rotational movement of the second abutment member 896 engaged with 848 is permitted.

The second rotating shaft 899 of the drain valve device 8 according to the embodiment rotatably supports the second contact member 896 at a position closer to the valve body main shaft 840 than the first rotating shaft 898 does. Therefore, when the large wash float 890 drops as the water level in the water storage tank 40 drops, the second abutment member 896 rotates at a position where the second rotary shaft 899 is farther from the valve body main shaft 840 than the first rotary shaft 898 is. is rotatably supported, the engagement between the second contact member 896 and the large cleaning engagement protrusion 848 is released with a smaller amount of rotation of the second contact member 896 .

That is, it is possible to shorten the time from when the large cleaning float 890 starts to lower until the engagement between the second contact member 896 and the large cleaning engaging projection 848 is released. As a result, the influence of friction generated between the second abutting member 896 and the large cleaning engaging projection 848 can be reduced, so variations in the dead water level of cleaning water can be suppressed.

Subsequently, as shown in FIG. 13 , when the valve body portion 84 moves further downward, the drain valve body 842 closes the drain port 400 of the tank portion 4 . When the drain valve body 842 closes the drain port 400, the wash water supplied from the water supply device 6 is stored in the tank portion 4, and the water level in the water storage tank 40 rises. As the water level in the water storage tank 40 rises, the large wash float 890 moves upward, and the first contact member 894 slides on the inclined surface 891 formed on the large wash float 890 .

Suppose that the contact position between the first contact member 894 and the large cleaning float 890 is farther from the main valve shaft 840 than the engagement position between the large cleaning engagement projection 848 and the second contact member 896, and Assume that it is provided at a position farther from the valve body main shaft 840 than the one-rotation shaft 898 . In this case, when the water level in the water storage tank 40 drops and the large wash float 890 moves downward, the rotational movement of the first contact member 894 causes the first contact member 894 to move against the large wash float 890. An upward force acts.

In contrast, in the drain valve device 8 according to the embodiment, the contact position between the first contact member 894 and the large cleaning float 890 is the engagement position between the large cleaning engagement protrusion 848 and the second contact member 896. is provided at a position farther from the valve body main shaft 840 than the first rotating shaft 898 and closer to the valve body main shaft 840 than the first rotating shaft 898 . With such a positional relationship, when the water level in the water storage tank 40 drops and the large washing float 890 moves downward, the first contact member 894 moves upward with respect to the large washing float 890. You can prevent giving power. Therefore, it is possible to prevent the operation of the large cleaning float 890 from being hindered by the first contact member 894 .

Finally, as shown in FIG. 14, the large wash engaging portion 892 has a first contact member 894 that contacts the side surface of the large wash float 890 and a second contact member 896 that is supported by the large wash float 890 from below. It will be in the state of the initial position. The wash water supplied from the water supply device 6 is stored in the tank portion 4, the water level in the water storage tank 40 rises, and the float 62 moves upward, whereby the water supply valve 64 is closed and the water is supplied to the tank portion 4. Water supply is stopped.

As described above, the drain valve device 8 according to the embodiment includes the drain valve body 842 , the large wash float 890 and the large wash engaging portion 892 . The drain valve body 842 has a valve body main shaft 840 extending upward, and opens and closes the drain port 400 of the tank portion 4 storing cleaning water according to the lifting of the valve body main shaft 840 . The large wash float 890 moves up and down in conjunction with the water level in the water storage tank 40 . The large cleaning engaging portion 892 can be engaged with a large cleaning engaging protrusion 848 provided on the outer periphery of the valve body main shaft 840, and rotates a rotating shaft (for example, a first rotating shaft 898 and a second rotating shaft 899). It can be disengaged from the large cleaning engagement protrusion 848 by a pivoting motion about the center.

Also, the large cleaning engaging portion 892 has a rotation axis at a position farther from the valve body main shaft 840 than the engaging position with the large cleaning engaging projection 848 . Furthermore, when the water level in the water storage tank 40 is higher than a predetermined water level, the large cleaning engaging portion 892 abuts the large cleaning float 890 from the side, thereby restricting its rotational movement. is lower than a predetermined water level, the large washing float 890 descends, releasing the state of contact with the large washing float 890 and permitting the rotating operation.

If the rotary shaft of the large cleaning engagement portion is provided at a position closer to the main shaft of the valve body than the engagement position between the large cleaning engagement portion and the large cleaning engagement projection, the large cleaning engagement portion and the large cleaning When the engagement with the engaging protrusion is released, the large cleaning engaging portion rotates while slightly lifting the large cleaning engaging protrusion. On the other hand, in the drain valve device 8 according to the embodiment, the rotating shaft of the large cleaning engaging portion 892 (for example, the first rotating shaft 898 and the second rotating shaft 899) Since it is provided at a position farther from the valve body main shaft 840 than the engagement position with the mating projection 848, when the engagement between the large cleaning engaging portion 892 and the large cleaning engaging projection 848 is released, the large cleaning engaging portion 892 rotates away from large wash engagement projection 848 without lifting large wash engagement projection 848 . Therefore, compared to the case where the rotating shaft of the large cleaning engaging portion is provided at a position closer to the main shaft of the valve body than the engagement position between the large cleaning engaging portion and the large cleaning engaging protrusion, the large cleaning engaging portion The influence of the frictional force generated between the mating projection 848 and the large cleaning engaging portion 892 can be suppressed. In addition, since the large cleaning engaging portion 892 abuts the large cleaning float 890 from the side, no frictional force is generated due to the weight of the large cleaning engaging portion 892 or the large cleaning float 890. Frictional force generated between the joining portion 892 can be suppressed.

In addition, when the rotary shaft of the large cleaning engaging portion 892 is provided at a position farther from the valve body main shaft 840 than the engagement position between the large cleaning engaging projection 848 and the large cleaning engaging portion 892, the valve body portion 84 is not heavy. Because the large cleaning engaging projection 848 and the large cleaning engaging portion 892 tend to rotate in the direction in which the engagement between the large cleaning engaging projection 848 and the large cleaning engaging portion 892 is disengaged due to the large cleaning engagement projection 848 and the large cleaning engaging portion 892 There is a risk that the engagement will be easily disengaged. On the other hand, in the drain valve device 8 according to one aspect of the embodiment, when the water level in the water storage tank 40 is higher than the predetermined water level, the large cleaning engaging portion 892 abuts the large cleaning float 890 from the side. Since the rotation of the large cleaning engaging portion 892 is restricted by the large cleaning float 890, it is possible to prevent the large cleaning engaging projection 848 from easily disengaging from the large cleaning engaging portion 892. can.

By the above action, the engagement between the large cleaning engagement protrusion 848 and the second contact member 896 is achieved while suppressing the influence of the frictional force generated between the large cleaning engagement protrusion 848 and the second contact member 896. You can prevent it from being released easily. Therefore, the timing at which the large cleaning engaging projection 848 and the second contact member 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 fluctuate. As a result, variations in the dead water level of wash water can be suppressed.

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

1 toilet device 2 toilet body 4 tank portion 6 water supply device 8 drain valve device 84 valve body portion 89 large wash float mechanism 840 valve body main shaft 842 drain valve body 848 large wash engagement projection 890 large wash float 892 large wash engagement portion 894 First contact member 896 Second contact member 898 First rotating shaft 899 Second rotating shaft

Claims (6)

a drain valve body having an upwardly extending valve body shaft for opening and closing a drain port of a cleaning water tank storing cleaning water in response to lifting of the valve body main shaft;
a float that moves up and down in conjunction with the water level of the wash water tank;
an engaging portion that can be engaged with an engaging projection provided on the valve body main shaft and can be disengaged from the engaging projection by rotating about a rotation shaft;
The engaging portion is
When the rotating shaft is positioned farther from the valve body main shaft than the engagement position with the engaging projection and the water level of the wash water tank is higher than a predetermined water level, the float receives a lateral force. The drain valve device restricts the rotational movement by abutment, and permits the rotational movement as the float descends when the water level of the wash water tank is below a predetermined water level. The contact position between the engaging portion and the float is
2. The drain valve device according to claim 1, wherein the drain valve device is provided at a position farther from the valve body main shaft than the engaging position between the engaging projection and the engaging portion and closer to the valve body main shaft than the rotating shaft. . In the initial position of the engaging portion before the valve body shaft is pulled up, when the engaging projection receives an upward force and rotates as the valve body shaft is pulled up, the engaging portion is rotated. 3. The drain valve device according to claim 1, further comprising an initial position returning portion that returns to the initial position. The initial position return portion is a part of the engaging portion supported from below by the float at a position farther from the valve body main shaft than the rotation shaft in the initial position,
When the engaging portion receives an upward force from the engaging projection as the valve body main shaft is lifted, the engaging portion rotates around the rotating shaft while pushing down the float against the buoyant force. 4. The drain valve device according to claim 3, wherein an upward force received from said float rising by means of said float rotates about said rotation axis and returns to said initial position. The engaging portion is
a first contact member that contacts the float from the side;
The drain valve device according to any one of claims 1 to 4, further comprising: a second contact member that is separate from the first contact member and contacts the engaging projection. The rotating shaft is
a first rotating shaft that rotatably supports the first contact member;
6. The second rotating shaft provided on the first contact member and rotatably supporting the second contact member at a position closer to the valve body main shaft than the first rotating shaft. drain valve device.

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