JP2020029757A - Water closet and float valve - Google Patents

Abstract

To reduce the instantaneous flow rate of flush water supplied from a tank device to a toilet body.SOLUTION: The water closet according to an embodiment includes a toilet body and a tank device. The toilet body includes a bowl section for receiving waste and a trap section connected to the bowl section. The tank device supplies flush water to the toilet body. The tank device also includes a tank body, an overflow pipe, and a float valve. The tank body stores the flush water. The overflow pipe extends in the tank body along the vertical direction and communicates an internal space of the tank body with a drain passage for flush water from the tank body to the toilet body, and overflows the flush water exceeding a full water level into an opening formed at the upper end side in the tank body and discharges the flush water from the drain passage to the toilet body. The float valve is provided on the upper end side of the overflow pipe and moves up and down according to a water level in the tank body to open and close the opening.SELECTED DRAWING: Figure 3

Description

  The disclosed embodiments relate to flush toilets and float valves.

  2. Description of the Related Art Conventionally, flush toilets that perform flushing by supplying flush water stored in a tank device to a toilet body are widely known (for example, see Patent Document 1). The flush toilet according to the related art is configured such that flush water is discharged from a tank device to a bowl portion of a toilet body, and then drained to a drain pipe through a trap portion connected to the bowl portion. You.

JP-A-2006-069873

  By the way, for example, the state of the above-mentioned drainage pipe differs for every construction place where a flush toilet is attached. Therefore, depending on the state of the drain pipe, it may be desirable to reduce the instantaneous flow rate of the washing water supplied from the tank device to the toilet body.

  That is, for example, when the drainage pipe has many bends in the middle, the drainage pipe becomes full when draining the washing water, and an unintended siphon phenomenon may occur. When such a siphon phenomenon occurs, for example, cleaning water (so-called refill water) which is supplied to the trap section after cleaning to form water sealing is drawn into the drain pipe, and the amount of water sealing may be insufficient. Therefore, for example, if the instantaneous flow rate of the wash water supplied from the tank device to the toilet body can be reduced, it is possible to lengthen the time during which the wash water is supplied to the toilet body, so that an unintended siphon phenomenon occurs. Even if it occurs, the cleaning water can be supplied to the trap section after the occurrence of the siphon phenomenon to ensure the amount of water sealing.

  However, the prior art described above does not reduce the instantaneous flow rate of the washing water supplied from the tank device to the toilet body.

  An object of one embodiment of the present invention is to provide a flush toilet and a float valve capable of reducing the instantaneous flow rate of flush water supplied from a tank device to a toilet body.

  The flush toilet according to one aspect of the embodiment includes a bowl portion that receives waste, and a toilet body including a trap portion connected to the bowl portion, and a tank device that supplies cleaning water to the toilet body, The tank device includes a tank body that stores washing water, and a tank body that extends vertically along the tank body, and drains washing water from the tank body to the toilet body from the internal space of the tank body. An overflow pipe that communicates with a flow path, overflows washing water that has exceeded a full water level in the tank main body to an opening formed at an upper end side, and discharges the flush water from the drain flow path to the toilet body; and the overflow pipe. And a float valve which is provided on the upper end side of the tank and moves up and down according to the water level in the tank body to open and close the opening.

  Thereby, the instantaneous flow rate of the washing water supplied from the tank device to the toilet body can be reduced. That is, for example, when the water level in the tank main body falls during toilet flushing, the float valve descends with the decrease in the water level, and closes the opening of the overflow pipe. The closing of the opening by the float valve makes it difficult for air to flow into the overflow pipe during toilet flushing, creating a negative pressure in the overflow pipe and reducing the instantaneous flow rate of wash water supplied from the tank device to the toilet body. Can be.

  Further, the generation of the negative pressure in the overflow pipe makes it possible to reduce the instantaneous flow rate of the wash water and to prolong the time during which the wash water is supplied to the toilet body. Accordingly, for example, even when the unintended siphon phenomenon occurs as described above, it is possible to supply the cleaning water to the trap unit after the siphon phenomenon occurs, thereby securing the amount of the sealed water.

  Also, for example, depending on the type of the tank device, it may be desirable to reduce the instantaneous flow rate of the washing water. That is, for example, in the case of a tank device in which the height of the tank body that stores the wash water is relatively high, the head pressure of the wash water is large, so that the water force of the wash water at the time of washing is strong, and the wash water is There is a risk of scattering outside. Therefore, by configuring the flush toilet as described above, the instantaneous flow rate of the wash water can be reduced, so that the water force of the wash water at the time of washing is weakened and the wash water is scattered outside the toilet body. Can be suppressed.

  Further, the float valve is disposed above the opening, and a valve body that can close the opening, and an open area that is opened to an internal space of the tank body at the opening closed by the valve body. And an adjustment unit that adjusts

  Thereby, the adjustment unit can adjust the amount of air flowing into the overflow pipe at the time of flushing the toilet, and as a result, can reduce the instantaneous flow rate of the wash water supplied from the tank device to the toilet body.

  In addition, when the water level in the tank main body rises to a predetermined water level, a regulating portion that regulates upward movement of the float valve with respect to the overflow pipe is provided.

  Thereby, the regulation part can suppress that the float valve hinders the function of the overflow pipe. That is, for example, since the restriction portion can prevent a part of the float valve from moving above the opening of the overflow pipe, the flow of the washing water exceeding the full water level into the overflow pipe can be prevented by the float valve. It is possible to prevent the section from being hindered.

  Moreover, since the upward movement of the float valve is regulated by the regulating portion when the water level in the tank body rises, it is possible to prevent the float valve from falling off from the upper end side of the overflow pipe. .

  A drain valve device provided at a drain port of the tank body, the drain valve including a drain valve for opening and closing the drain port, wherein the float valve moves up and down according to a water level in the tank body, and The apparatus may further include a float disposed adjacent to the device, wherein the float has a portion facing the drain valve device formed in a shape along the outer shape of the drain valve device.

  Accordingly, in the float portion, for example, when the float portion moves up and down according to the water level in the tank body, it is difficult to contact the drain valve device, and thus it is possible to suppress interference with the drain valve device.

  Further, the float portion is characterized in that a portion facing the drain valve device is formed in a concave shape along the outer shape of the drain valve device.

  Thereby, in the float part, for example, when moving up and down according to the water level in the tank main body, it is less likely to come into contact with the drain valve device, and thus it is possible to further suppress interference with the drain valve device. .

  Further, the float portion is characterized in that a portion opposite to a portion facing the drain valve device is formed in a shape along the outer shape of the drain valve device.

  With this configuration, the float portion is configured as described above, so that the center of gravity is not biased, so that the float valve including the float portion does not easily tilt when moving up and down, and can smoothly move up and down.

  The float valve according to one aspect of the embodiment includes a tank body that stores washing water supplied to a toilet body that includes a bowl part that receives waste and a trap part that is connected to the bowl part; Along the vertical direction, and communicates the internal space of the tank body and the drainage flow path of the wash water from the tank body to the toilet body, the washing exceeding the full water level in the tank body An overflow pipe for overflowing water to an opening formed on the upper end side and discharging the water from the drain passage to the toilet body, wherein the float valve is provided in a tank device. A valve body disposed above, and a float connected to the valve body and moving up and down in accordance with a water level in the tank body to open and close the opening by the valve body. Characterized in that it comprises and.

  Thereby, the instantaneous flow rate of the washing water supplied from the tank device to the toilet body can be reduced. Also, for example, by attaching the float valve according to one aspect of the embodiment to an overflow pipe of an existing flush toilet, the instantaneous flow rate of flush water supplied from the tank device to the toilet body can be reduced.

  According to one aspect of the embodiment, the instantaneous flow rate of the wash water supplied from the tank device to the toilet body can be reduced.

FIG. 1 is a perspective view showing a flush toilet according to the embodiment. FIG. 2 is a sectional view taken along line II-II of FIG. FIG. 3 is a sectional view taken along line III-III of FIG. FIG. 4 is a perspective view of the float valve. FIG. 5 is a plan view of the float valve. FIG. 6 is a bottom view of the float valve. FIG. 7 is a sectional view taken along line VII-VII of FIG. FIG. 8A is a view for explaining the operation of the float valve and the like at the time of flushing the toilet. FIG. 8B is a diagram illustrating the operation of the float valve and the like at the time of flushing the toilet. FIG. 8C is a diagram illustrating the operation of the float valve and the like at the time of flushing the toilet. FIG. 8D is a diagram illustrating the operation of the float valve and the like at the time of flushing the toilet. FIG. 8E is a diagram for explaining the operation of the float valve and the like at the time of flushing the toilet. FIG. 8F is a diagram for explaining the operation of the float valve and the like at the time of flushing the toilet.

  Hereinafter, embodiments of a flush toilet and a float valve disclosed in the present application will be described in detail with reference to the accompanying drawings. The present invention is not limited by the embodiments described below.

<1. Flush toilet>
FIG. 1 is a perspective view showing a flush toilet according to the embodiment, and FIG. 2 is a sectional view taken along line II-II of FIG. In FIG. 1 and the like, a three-dimensional orthogonal coordinate system including a Z-axis having a vertically upward direction as a positive direction is illustrated for easy understanding. Such an orthogonal coordinate system may be illustrated in other figures.

  In the following description, the X-axis positive direction is “right”, the X-axis negative direction is “left”, the Y-axis positive direction is “forward”, the Y-axis negative direction is “rearward”, Z The positive direction of the axis may be described as “upper”, and the negative direction of the Z axis may be described as “downward”. The figures shown in FIGS. 1 and 2 and FIGS. 3 and thereafter are all schematic views.

  As shown in FIGS. 1 and 2, the flush toilet 1 includes a toilet body (hereinafter, sometimes referred to as “toilet”) 2 and a tank device 10. The toilet 2 includes a bowl 3, a rim 4, a trap 5, and a water channel 6.

  The bowl part 3 is formed in a bowl shape capable of receiving waste. The rim 4 is formed on the upper edge of the bowl 3. For example, a toilet seat (not shown) is provided above the rim portion 4.

  The rim 4 is connected to a water channel 6. The water conduit 6 includes a first water outlet 6a and a second water outlet 6b (see FIG. 1). When the toilet bowl is cleaned, the flush water discharged from the drain port 15 of the tank device 10 flows into the water conduit 6. Then, the washing water in the water conduit 6 is discharged to the bowl section 3 through the first and second water outlets 6a and 6b, and the bowl section 3 is washed while turning.

  As described above, the water conduit 6 is a flow path for supplying the washing water discharged from the drain port 15 of the tank device 10 (more precisely, the tank body 11 described later) to the bowl portion 3 of the toilet 2, This is an example. Note that the number of water outlets of the water conduit 6 is not limited to two, and may be one or three or more.

  The trap section 5 is connected to the bowl section 3. More specifically, as shown in FIG. 2, the trap unit 5 includes an inlet 5a, an ascending pipeline 5b, and a descending pipeline 5c. The inlet 5 a is provided so as to be continuous with the bottom of the bowl 3, and allows the washing water from the bowl 3 to flow into the trap 5. The rising pipe 5b is formed so as to extend obliquely upward from the inlet 5a. The descending pipeline 5c is formed to extend downward from the ascending pipeline 5b.

  Further, a drain pipe 20 is connected to a lower end of the descending pipeline 5c. Accordingly, when the toilet bowl is washed, the washing water in the bowl section 3 is drained to the drain pipe 20 through the inlet section 5a of the trap section 5, the ascending pipe 5b, and the descending pipe 5c.

  The trap section 5 is configured as described above, and has a shape in which a predetermined amount of cleaning water is stored. That is, the trap portion 5 prevents the odor and the like from the drain pipe 20 from flowing back to the bowl portion 3 side because the washing water is accumulated and functions as a sealing water.

<2. Tank device>
The tank device 10 is installed above the rear of the toilet 2 (in the negative direction of the Y-axis) and supplies the toilet 2 with flush water. For example, the tank device 10 includes a tank body 11 and a lid 12. The tank main body 11 is a rectangular parallelepiped container having an open upper surface, and stores cleaning water. The drain port 15 described above is provided on the bottom surface of the tank body 11.

  Note that various devices such as a drain valve device 40 are arranged inside the tank main body 11 as schematically shown in FIG. 2, which will be described later with reference to FIG. Moreover, the shape of the tank main body 11 shown in FIG. 1, the installation position of the tank main body 11 with respect to the toilet bowl 2, and the like are merely examples and are not limited.

  The lid 12 is disposed so as to entirely cover the upper surface of the tank body 11, and is detachably attached to the upper part of the tank body 11.

  In addition, the flush toilet 1 shown in FIGS. 1 and 2 is a so-called flush type, in which filth is flushed out by flowing water due to a drop of flush water in the bowl portion 3. In addition, the flush toilet 1 is not limited to the wash-down type, and may be a so-called siphon type in which, for example, the dirt in the bowl portion 3 is drawn in using a siphon action and drained. In addition, in FIGS. 1 and 2, the flush toilet 1 of the floor-standing type is shown, but the flush toilet 1 is not limited to this and may be a wall-mounted type.

  Next, the configuration of the tank device 10 will be described in detail with reference to FIG. FIG. 3 is a sectional view taken along line III-III of FIG.

  As shown in FIG. 3, the tank device 10 includes a water supply device 30, a drain valve device 40, a drive unit 50, and an overflow pipe 60, which are arranged and accommodated in the tank body 11.

  The water supply device 30 supplies cleaning water into the tank body 11. For example, the water supply device 30 includes a float 31, and supplies or stops the supply of the cleaning water into the tank body 11 in accordance with the vertical movement of the float 31.

  The drain valve device 40 includes a drain valve 41 and a wire 42, and is configured to open and close the drain valve 41. Specifically, the drain valve 41 is provided at the drain port 15 and is configured to be vertically movable. Then, the drain valve 41 opens and closes the drain port 15 by the vertical movement. The wire 42 has one end connected to the drain valve 41 and the other end connected to the drive unit 50.

  When the operation lever 51 provided on the side of the tank main body 11 is manually operated, the drive unit 50 rotates a gear (not shown) to wind up the wire 42. As a result, the drain valve 41 is pulled up by the wire 42 and rises, and the drain port 15 is opened. By opening the drain port 15, the washing water in the tank body 11 is drained to the toilet 2 (see FIG. 1), that is, the toilet is washed.

  In the above description, the toilet is washed by the manual operation of the operation lever 51, but the present invention is not limited to this. That is, although not shown, for example, an electric drive unit including an electric drive unit such as a motor is connected to the drain valve device 40, and the drain valve device 40 is output from a remote controller or the like in response to a signal indicating the start of toilet flushing. The toilet may be cleaned by operating.

  The overflow pipe 60 is provided in the tank main body 11 beside the drain valve device 40, in other words, is provided adjacent to the drain valve device 40. The overflow pipe 60 is formed in, for example, a long tubular shape and extends in the tank main body 11 along the vertical direction.

  The overflow pipe 60 has an upper end opening 61a formed on the upper end side and a lower end opening 61b formed on the lower end side. The upper end opening 61a is located in the internal space S of the tank body 11 and is opened. The lower end opening 61 b is connected to the downstream side of the drain port 15 and communicates with the water conduit 6 that continues from the drain port 15. That is, the overflow pipe 60 communicates the internal space S of the tank main body 11 with the water conduit 6 which is a drainage flow path of the washing water from the tank main body 11 to the toilet 2 (see FIG. 2).

  Accordingly, the overflow pipe 60 causes the flush water that has exceeded the full water level in the tank body 11 to overflow into the upper end opening 61a, and the bowl 3 of the toilet bowl 2 (see FIG. 2) via the lower end opening 61b and the water conduit 6. Can be discharged to The upper opening 61a is an example of an opening. Further, the shape and the arrangement position of the overflow pipe 60 shown in FIG. 3 are only examples and are not limited.

  By the way, in the flush toilet 1 provided with the above-described tank device 10 (see FIG. 2), it may be desirable to reduce the instantaneous flow rate of the wash water supplied from the tank device 10 to the toilet 2.

  That is, for example, since the state of the drain pipe 20 connected to the flush toilet 1 is different for each construction site, depending on the state of the drain pipe 20, an unintended siphon phenomenon (self-siphon phenomenon) occurs at the time of draining the washing water. May occur. When such a siphon phenomenon occurs, for example, washing water (so-called refill water) for forming a seal of the trap section 5 after the toilet is washed may be drawn into the drain pipe 20, and the amount of the seal water may be insufficient.

  Therefore, if the instantaneous flow rate of the wash water from the tank device 10 can be reduced, the time during which the wash water is supplied to the toilet bowl 2 can be lengthened, and the unintended siphon phenomenon occurs. Also, after the occurrence of the siphon phenomenon, the washing water can be supplied to the trap section 5 to secure the amount of sealed water.

  Further, when it is desirable to reduce the instantaneous flow rate of the washing water, the present invention is not limited to the above. For example, when the height of the tank body 11 is relatively high, the head pressure of the washing water is large, so that the water force of the washing water at the time of washing becomes strong, and the washing water may scatter outside the toilet bowl 2. Therefore, if the instantaneous flow rate of the washing water from the tank device 10 can be reduced, the water force of the washing water at the time of washing is weakened, and it is possible to suppress the washing water from scattering to the outside of the toilet 2.

  As described above, the flush toilet 1 according to the present embodiment has a configuration in which the instantaneous flow rate of the wash water supplied from the tank device 10 to the toilet 2 can be reduced.

<3. Float Valve and Regulator>
Hereinafter, the configuration of the tank device 10 will be described in detail. The tank device 10 includes a float valve 70 and a restricting portion 80 (not visible in FIG. 3; see FIG. 4 and the like to be described later). The float valve 70 is provided on the upper end side of the overflow pipe 60.

  Then, the float valve 70 moves up and down according to the water level WL in the tank body 11 to open and close the upper end opening 61a. For example, the float valve 70 is configured to open the upper end opening 61a when the water level WL in the tank body 11 is at a water level before the toilet flushing is performed as shown in FIG. Then, in the present embodiment, when the flushing of the toilet is started and the water level WL in the tank body 11 decreases, the float valve 70 descends to close the upper end opening 61a, so that the tank device 10 The instantaneous flow rate of the washing water supplied to the toilet 2 can be reduced.

  The above-mentioned float valve 70 will be described in detail with reference to FIG. FIG. 4 is a perspective view of the float valve 70 provided in the overflow pipe 60. As shown in FIG. 4, the float valve 70 includes a float part 71, a valve body 72, a connecting part 73, and an adjusting part 74. The float valve 70 is made of a material that can be floated by buoyancy received from the washing water stored in the tank body 11. As such a material, for example, a resin can be used, but it is not limited to this.

  FIG. 5 is a plan view of the float valve 70 described above. 6 is a bottom view of the float valve 70, and FIG. 7 is a sectional view taken along line VII-VII of FIG. In FIGS. 5 and 6, the overflow pipe 60 is indicated by a two-dot chain line for the sake of easy understanding.

  As shown in FIGS. 4 to 7, the float portion 71 of the float valve 70 is formed, for example, in a cylindrical shape, and an upper end portion of the overflow pipe 60 is inserted into a hollow portion inside. The float 71 is attached to the overflow pipe 60 so as to be vertically movable. The float valve 70 configured as described above becomes a portion that receives buoyancy from the washing water stored in the tank main body 11, and moves up and down according to the water level WL in the tank main body 11.

  Here, since the overflow pipe 60 is disposed adjacent to the drain valve device 40 (see FIG. 3) as described above, the float valve 70 including the float portion 71 provided in the overflow pipe 60 is also shown in FIG. As shown, it is arranged adjacent to the drain valve device 40. In FIG. 5, the drain valve device 40 is schematically shown by a two-dot chain line.

  Therefore, the float portion 71 according to the present embodiment is formed in a shape that does not interfere with the drain valve device 40 that is arranged adjacently. For example, in the float portion 71, a portion 71 a facing the drain valve 41 is formed in a shape along the outer shape of the drain valve device 40.

  Specifically, for example, when the outer shape of the drain valve device 40 is cylindrical, the float portion 71 has a portion 71a facing the drain valve 41 in a concave shape along the outer shape of the drain valve device 40 in plan view. It is formed. Specifically, the float portion 71 is formed in a concave shape in which the portion 71a is curved so as to be concave in the center direction (radial direction) in plan view.

  Thereby, in the float part 71 according to the present embodiment, for example, when the float part 71 moves up and down according to the water level WL in the tank main body 11, the float part 71 does not easily come into contact with the drain valve apparatus 40, and therefore, does not interfere with the drain valve apparatus 40. Can be suppressed.

  Further, since the float portion 71 is configured as described above, the float valve 70 and the drain valve device 40 can be arranged closer to each other, and as a result, the float valve 70 and the drain valve in the tank body 11 can be arranged. The space occupied by the device 40 can be reduced.

  Further, the float portion 71 is formed in a shape having symmetry in a plan view, for example, a shape which is left-right symmetric or substantially left-right symmetric. Specifically, in the float portion 71, a portion 71 b opposite to the portion 71 a facing the drain valve device 40 is formed in a shape (for example, a concave shape) along the outer shape of the drain valve device 40. Thereby, the float valve 70 including the float portion 71 can move up and down smoothly.

  That is, for example, if only one portion 71a of the float portion 71 is formed in a concave shape, the center of gravity is deviated. Therefore, the float valve 70 including the float portion 71 tends to tilt when moving up and down, and may not move up and down smoothly.

  On the other hand, in the float portion 71 according to the present embodiment, as described above, the portion 71b opposite to the one portion 71a has the same shape as the one portion 71a, that is, along the outer shape of the drain valve device 40. It is formed into a shape. Accordingly, the float portion 71 according to the present embodiment does not have a deviated center of gravity, so that the float valve 70 including the float portion 71 does not easily tilt when moving up and down, and can move up and down smoothly.

  In addition, the shape of the float part 71 shown in FIG. 5 and the like is only an example and is not limited. That is, in the above description, the float portion 71 is configured such that the portion 71 a and the portion 71 b are formed in a concave shape in a plan view. However, the present invention is not limited thereto. It may be formed in another shape such as a convex shape.

  The valve body 72 is formed, for example, in a thin disk shape, as shown in FIGS. 4 and 7, and is disposed above the upper end opening 61 a of the overflow pipe 60. Further, the valve body 72 is connected to the float part 71 by a connecting part 73. The connecting portion 73 is formed, for example, in a columnar shape, and connects the periphery of the valve body 72 and the float portion 71 at predetermined intervals. Therefore, the valve body 72 is located away from the float 71 by the height of the connecting portion 73, and a gap A is formed between the valve 72 and the float 71.

  Then, for example, when the water level WL in the tank main body 11 drops at the time of flushing the toilet bowl, the valve body 72 descends together with the float part 71 and comes into contact with the upper end opening 61a, so that the upper end opening 61a can be closed. In other words, the upper end opening 61a can be closed.

  As shown in FIG. 7, when the valve body 72 is provided with a sealing member 75 on the lower surface 72a and the valve body 72 is in contact with the upper end opening 61a of the overflow pipe 60, the upper end opening 61a is airtight. May be closed. For example, the seal member 75 is formed in a disk shape capable of covering the upper end opening 61a, and is formed of an elastic material such as rubber, but is not limited thereto.

  Due to the closing of the upper end opening 61 a by the valve body 72, it becomes difficult for air to flow into the overflow pipe 60 at the time of flushing the toilet, a negative pressure is generated in the overflow pipe 60, and the negative pressure is supplied from the tank device 10 to the toilet 2. The instantaneous flow rate of the cleaning water decreases, which will be described later with reference to FIG.

  As shown in FIGS. 5 to 7, a hole 72 b is formed in the valve body 72. The hole 72b is formed in a circular shape in plan view, and is provided near the center of the valve body 72. The shape and position of the hole 72b in the valve body 72 can be arbitrarily changed. Hereinafter, such holes 72b may be referred to as “valve body holes 72b”.

  In the seal member 75, a hole 75a having the same size as the valve hole 72b is formed at a position corresponding to the valve hole 72b. Therefore, as shown in FIG. 7, in the valve body 72, the space above the upper surface 72c and the space below the lower surface 72a are communicated via the valve body hole 72b and the hole 75a of the seal member 75.

  An adjusting section 74 is provided on the upper surface 72c side of the valve body 72. As shown in FIG. 5, the adjusting section 74 is provided at a position on the upper surface 72c of the valve body 72 so as to cover the valve body hole 72b, and adjusts the opening area of the valve body hole 72b.

  For example, the adjustment section 74 includes a plate section 74a, a shaft section 74b, an adjustment hole 74c, and an operation section 74d. The plate portion 74a is formed in, for example, a thin fan shape or a substantially triangular shape. In addition, the plate part 74a can be changed to an arbitrary shape.

  The shaft portion 74b is provided so as to protrude upward from the upper surface 72c of the valve body 72, and the plate portion 74a is rotatably attached. Therefore, the plate portion 74a is rotatable about the shaft portion 74b (see the arrow B1 in FIG. 5).

  The adjustment hole 74c is a hole formed in the plate portion 74a. There are a plurality of adjusting holes 74c, for example, including a first adjusting hole 74c1, a second adjusting hole 74c2, a third adjusting hole 74c3, and a fourth adjusting hole 74c4. In the example shown in FIG. 5, the number of the adjustment holes 74c is four, but the number is not limited to this, and may be two, three, or five or more.

  The first to fourth adjustment holes 74c1 to 74c4 are set so that the opening areas in plan view are different from each other. Specifically, the opening area is set to be larger in the order of the first adjustment hole 74c1, the second adjustment hole 74c2, the third adjustment hole 74c3, and the fourth adjustment hole 74c4.

  The first to fourth adjustment holes 74c1 to 74c4 are formed at positions where they can overlap with the valve body holes 72b when the plate portion 74a rotates. Note that the example shown in FIG. 5 shows a state where the first adjustment hole 74c1 and the valve body hole 72b overlap.

  The operation section 74d is a convex knob operated by an operator when rotating the plate section 74a. That is, the operator can change the adjustment hole 74c overlapping the valve body hole 72b among the first to fourth adjustment holes 74c1 to 74c4 by holding the operation portion 74d and rotating the plate portion 74a. . The operator may be, for example, a constructor who attaches the flush toilet 1 to a construction location, or may be a user who uses the flush toilet 1.

  The adjusting section 74 adjusts the opening area of the valve body hole 72b by changing the adjustment hole 74c overlapping the valve body hole 72b. Specifically, for example, the opening area of the valve body hole 72b is relatively small when overlapping with the first adjustment hole 74c1 of the adjustment unit 74, and is relatively large when overlapping with the fourth adjustment hole 74c4.

  Therefore, in the adjusting section 74 configured as described above, for example, the opening at the upper end 61a of the overflow pipe 60 closed by the valve body 72 is opened to the internal space S of the tank body 11 (see FIG. 3). It is possible to adjust the open area to be used.

  That is, as described above, the float valve 70 descends as the water level WL in the tank body 11 decreases during the flushing of the toilet bowl, and closes the upper end opening 61 a of the overflow pipe 60 with the valve body 72. At this time, since the internal space S of the tank main body 11 and the space in the overflow pipe 60 are communicated with each other through the valve body hole 72b of the valve body 72 and the adjustment hole 74c of the adjustment unit 74, the adjustment hole 74c is By changing, it is possible to adjust the open area of the upper end opening 61a that is open to the internal space S of the tank body 11.

  When the open area of the upper end opening 61a is adjusted, the amount of air flowing into the overflow pipe 60 through the valve body hole 72b of the valve body 72 during flushing of the toilet bowl can be adjusted. The instantaneous flow rate of the washing water supplied to 2 can be adjusted, which will be described later.

  Next, the regulating section 80 will be described with reference to FIG. The restricting portion 80 is a member that restricts the upward movement of the float valve 70, and is a member that functions as a so-called stopper.

  For example, the restriction portion 80 includes a cylindrical portion 81 and a flange portion 82. The cylindrical portion 81 is formed in a cylindrical shape, and is fitted and fixed near the upper end of the overflow pipe 60. Specifically, the cylindrical portion 81 is fixed so as to be inserted between the overflow pipe 60 and the float 71 of the float valve 70 inserted into the overflow pipe 60.

  The flange portion 82 is, for example, a portion formed in an annular shape. For example, the flange portion 82 is formed so as to extend radially outward from the upper end of the cylindrical portion 81. Further, the flange portion 82 is positioned at the same height or substantially the same height as the upper end opening 61a of the overflow pipe 60, but is not limited thereto. The flange 82 is set so that the outer diameter d1 is larger than the inner diameter d2 of the float 71 (d1> d2).

  When the water level WL in the tank main body 11 rises to the predetermined water level, the upper end of the float portion 71 comes into contact with the flange portion 82 as shown in FIG. The upward movement of the float valve 70 with respect to the pipe 60 is restricted.

  The predetermined water level is, for example, a water level at which the float valve 70 can be raised until the upper end of the float portion 71 reaches the same height or approximately the same height as the upper end opening 61a of the overflow pipe 60. However, the present invention is not limited to this.

  In the present embodiment, the restriction portion 80 can suppress the float valve 70 from impairing the function of the overflow pipe 60. In other words, the regulating section 80 can prevent, for example, the float section 71 from moving above the upper end opening 61a of the overflow pipe 60, so that the inflow of the washing water that has exceeded the full water level into the overflow pipe 60 can be prevented. The obstruction of the part 71 and the like can be suppressed.

  Further, in the present embodiment, when the water level WL in the tank body 11 rises, the upward movement of the float valve 70 is regulated by the regulating section 80, so that the float valve 70 is It can also be prevented from falling off from the upper end side.

  In the above description, the cylindrical portion 81 of the restricting portion 80 is located on the outer peripheral side of the overflow pipe 60. However, the present invention is not limited to this. For example, the cylindrical section 81 is located on the inner peripheral side of the overflow pipe 60. You may make it.

<4. Operation of float valve etc.>
Next, the operation of the float valve 70 and the drain valve 41 at the time of flushing the toilet, the state of the wash water supplied from the tank device 10 to the toilet 2, and the like will be described with reference to FIGS. 8A to 8F are diagrams for explaining the operation of the float valve 70 and the like at the time of flushing the toilet.

  First, FIG. 8A shows a state of the float valve 70 and the drain valve 41 before the toilet flushing is started. Specifically, as shown in FIG. 8A, the drain port 15 of the tank body 11 is closed by the drain valve 41 of the drain valve device 40. Before the start of the toilet flush, the water level WL of the flush water W in the tank body 11 is set, for example, near the upper end of the overflow pipe 60. As a result, the float portion 71 of the float valve 70 receives buoyancy from the washing water W and is positioned above the overflow pipe 60, so that the valve body 72 is located at a position separated from the upper end opening 61a of the overflow pipe 60. You. That is, the upper end opening 61 a of the overflow pipe 60 is open to the internal space S of the tank body 11.

  Then, for example, when the operation lever 51 (see FIG. 3) is operated to start the flushing of the toilet, the float valve 70, the drain valve 41, and the like are in a state as shown in FIG. 8B. Specifically, the drain valve 41 is lifted upward, as shown by the arrow C1, to open the drain port 15. When the drain port 15 is opened, the washing water W stored in the tank body 11 is discharged from the drain port 15 and flows into the water conduit 6 of the toilet 2 (see arrow D1). Then, as described above, the washing water W flows from the water conduit 6 to the bowl portion 3 (see FIG. 2), and the toilet is washed.

  Further, since the lower end opening 61b of the overflow pipe 60 is connected to the downstream side of the drain port 15, the washing water W discharged from the drain port 15 is also supplied to the overflow pipe 60 via the lower end opening 61b. It will flow in (see arrow D2). In FIG. 8B, the washing water that has flowed into the overflow pipe 60 is indicated by a symbol W1.

  Further, when the flushing of the toilet is started, the water level WL in the tank body 11 decreases, so that the float valve 70 also gradually descends as shown by the arrow C2.

  Then, as shown in FIG. 8C, when the water level WL in the tank main body 11 further decreases, the float valve 70 also continues to lower (see arrow C3), and then the valve body 72 comes into contact with the upper end opening 61a of the overflow pipe 60. Then, the upper end opening 61a is closed. At the timing when the valve element 72 closes the upper end opening 61a of the overflow pipe 60, it is assumed that the drain valve 41 is still in a state where the drain port 15 is opened and is gradually descending (see arrow C4). .

  When the upper end opening 61a is closed by the valve body 72, since it becomes difficult for air to flow into the overflow pipe 60 as compared with the case where the upper end opening 61a is opened, a negative pressure is generated in the overflow pipe 60. Occurs. When a negative pressure is generated in the overflow pipe 60, the cleaning water W1 in the overflow pipe 60 becomes difficult to flow into the water conduit 6, and as a result, the instantaneous flow rate of the cleaning water supplied from the tank body 11 to the water conduit 6 decreases. In other words, the instantaneous flow rate of the washing water supplied from the tank device 10 to the toilet 2 is reduced (see arrow D3).

  Further, the degree of reduction of the instantaneous flow rate of the cleaning water W can be adjusted by the adjusting unit 74 described above. That is, the adjusting section 74 adjusts the open area opened to the internal space S of the tank main body 11 at the upper end opening 61a of the overflow pipe 60 closed by the valve body 72, as described above.

  Therefore, for example, when the adjusting section 74 adjusts the opening area of the upper end opening 61a to be relatively small, the amount of air (see arrow E1) flowing into the overflow pipe 60 also decreases. As a result, a relatively high negative pressure is generated in the overflow pipe 60, and the instantaneous flow rate of the cleaning water W can be relatively significantly reduced.

  Conversely, for example, when the adjusting section 74 adjusts the opening area of the upper end opening 61a to be relatively large, the amount of air flowing into the overflow pipe 60 also increases. As a result, a relatively low negative pressure is generated in the overflow pipe 60, and the decrease in the instantaneous flow rate of the cleaning water W is relatively small.

  As described above, in the float valve 70 according to the present embodiment, the provision of the adjusting unit 74 can adjust the degree of reduction in the instantaneous flow rate of the cleaning water W.

  Subsequently, as shown in FIG. 8D, the drain valve 41 continues to lower further (see the arrow C5), and then closes the drain port 15. Thus, the discharge of the cleaning water W from the tank body 11 through the drain port 15 is completed. At this time, the cleaning water W1 remains in the overflow pipe 60 due to the negative pressure generated in the overflow pipe 60, and the cleaning water W1 is discharged after the discharge of the cleaning water W through the drain port 15 is completed. , And flows into the water conduit 6 (see arrow D4). That is, the time during which the wash water W, W1 flows into the water conduit 6 is longer than when no negative pressure is generated in the overflow pipe 60.

  As described above, in the present embodiment, the instantaneous flow rate of the wash water W is reduced by generating a negative pressure in the overflow pipe 60 using the float valve 70, and the flush water W, W1 It is possible to lengthen the time supplied to the device. Thus, for example, even when the unintended siphon phenomenon occurs as described above, the cleaning water W1 is supplied to the trap unit 5 (see FIG. 3) after the siphon phenomenon occurs to secure the amount of sealed water. be able to.

  Then, as shown in FIG. 8E, the cleaning water W1 remaining in the overflow pipe 60 continues to flow into the water conduit 6 (see arrow D5), and the discharge of the cleaning water W1 in the overflow pipe 60 to the water conduit 6 is completed. I do.

  Further, when the water level WL of the tank body 11 decreases due to the toilet flushing, as shown in FIG. 8F, the cleaning water W is supplied to the tank body 11 from the water supply device 30 (see FIG. 3), and the water level WL rises. Then, as the water level WL rises, the float valve 70 rises as shown by an arrow C6, and opens the upper end opening 61a of the overflow pipe 60, and thereafter, before the start of toilet flushing as shown in FIG. 8A. Return to the state.

  As described above, the flush toilet 1 according to the embodiment includes the toilet (the toilet body) 2 and the tank device 10. The toilet bowl 2 includes a bowl part 3 for receiving waste and a trap part 5 connected to the bowl part 3. The tank device 10 supplies flush water to the toilet 2. Further, the tank device 10 includes a tank main body 11, an overflow pipe 60, and a float valve 70.

  The tank body 11 stores cleaning water. The overflow pipe 60 extends in the tank main body 11 along the up-down direction, and also has an internal space S of the tank main body 11 and a conduit 6 for washing water from the tank main body 11 to the toilet bowl 2 (an example of a drainage flow path). In the tank main body 11, the flush water exceeding the full water level overflows into an upper end opening 61 a (an example of an opening) formed on the upper end side and is discharged from the water conduit 6 to the toilet 2. The float valve 70 is provided on the upper end side of the overflow pipe 60 and moves up and down according to the water level in the tank body 11 to open and close the upper end opening 61a. Thus, the instantaneous flow rate of the wash water supplied from the tank device 10 to the toilet 2 can be reduced.

  In the adjusting section 74 according to the above-described embodiment, the upper end of the overflow pipe 60 is formed by overlapping the first to fourth adjusting holes 74c1 to 74c4 having different opening areas with the valve body hole 72b of the valve body 72. Although the opening area of the opening 61a is adjusted, this is merely an example and is not limited. That is, for example, the adjusting unit 74 may adjust the open area of the upper end opening 61a of the overflow pipe 60 by using another configuration such as changing the number of the adjusting holes 74c overlapping the valve body hole 72b. .

  Further, in the above-described embodiment, the float valve 70 is provided with the adjusting unit 74, but the present invention is not limited to this, and a configuration in which the adjusting unit 74 is removed may be employed.

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

DESCRIPTION OF SYMBOLS 1 Rinse toilet 2 Toilet bowl 3 Bowl part 5 Trap part 6 Water conduit 10 Tank device 11 Tank main body 40 Drain valve device 41 Drain valve 60 Overflow pipe 61a Upper end opening part 70 Float valve 80 Restriction part 74 Adjustment part

Claims (7)

A bowl portion for receiving filth, and a toilet body including a trap portion connected to the bowl portion;
A tank device for supplying washing water to the toilet body,
The tank device,
A tank body for storing washing water,
The tank body extends vertically along the inside of the tank body, and communicates an internal space of the tank body with a drainage flow path of washing water from the tank body to the toilet body, so that the full water level in the tank body An overflow pipe that overflows the washing water that has passed over the opening formed on the upper end side and discharges the flush water from the drain passage to the toilet body,
A flush valve provided at an upper end side of the overflow pipe, the float valve moving up and down in accordance with a water level in the tank body to open and close the opening. The float valve,
A valve body disposed above the opening and capable of closing the opening;
The flush toilet according to claim 1, further comprising: an adjusting unit that adjusts an open area that is opened to an internal space of the tank main body at the opening that is closed by the valve body. 3. The flush toilet according to claim 1, further comprising: a regulating unit that regulates upward movement of the float valve with respect to the overflow pipe when the water level in the tank body rises to a predetermined water level. 4. A drain valve device including a drain valve provided at a drain port of the tank body to open and close the drain port;
The float valve,
A vertically moving part in accordance with the water level in the tank body, and a float disposed adjacent to the drain valve device;
The float unit,
The flush toilet according to any one of claims 1 to 3, wherein a portion facing the drain valve device is formed in a shape along the outer shape of the drain valve device. The float unit,
The flush toilet according to claim 4, wherein a portion facing the drain valve device is formed in a concave shape along the outer shape of the drain valve device. The float unit,
The flush toilet according to claim 4 or 5, wherein a portion opposite to the portion facing the drain valve device is formed in a shape along the outer shape of the drain valve device. A tank body for storing washing water supplied to a toilet body having a bowl part for receiving waste and a trap part connected to the bowl part, and a tank body extending vertically along the tank body, The internal space of the tank body communicates with the drainage flow path of the wash water from the tank body to the toilet body, and the wash water that has exceeded the full water level in the tank body overflows into the opening formed on the upper end side. An overflow pipe for discharging from the drain passage to the toilet body, a float valve provided in the tank device,
A valve body disposed above the opening of the overflow pipe;
A float connected to the valve body and moving up and down according to the water level in the tank body to open and close the opening by the valve body.

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