JP4941795B1 - Drain valve device and washing water tank device provided with the same - Google Patents

Abstract

A drainage valve capable of preventing a malfunction of the switching valve due to a weight falling off from a switching valve for switching a washing water amount supplied from a washing water tank to a toilet to a large washing and a small washing and improving the reliability of drainage performance. An apparatus and a cleaning water tank apparatus including the apparatus are provided.
A drain valve device according to the present invention includes a drain valve that opens and closes a drain port of a water storage tank, an inner control cylinder member that controls vertical movement of the drain valve, and a periphery of the inner control cylinder member. An outer control cylinder member 62 provided so as to surround the outer control cylinder member, and the switching valve 56 attached to the outer control cylinder member, side walls 90b and 90b 'and an opening 90c formed on the side wall so as to be opened and closed. The switching valve includes a plate-like weight 56b and a weight mounting portion 56d. The weight mounting portion includes support portions 56f and 56g that support the upper and lower ends of the weight, and A snap fit 110 that is provided on the side and fixes the side of the weight.
[Selection] Figure 17

Description

  The present invention relates to a drain valve device and a flush water tank device including the drain valve device, and more particularly, to a drain valve device for a flush water tank that stores flush water for washing a toilet bowl, and a flush water tank device including the drain valve device. .

Conventionally, as a drain valve device for a washing water tank for storing washing water for washing a toilet and a washing water tank device provided with the same, for example, as described in Patent Document 1, it is formed at the bottom of the washing water tank. A cylinder is provided so as to surround the drain outlet and the drain valve for opening and closing the drain outlet, and a switching valve with a weight for opening and closing the opening formed on the side surface of the cylinder is provided. By doing so, the amount of washing water supplied to the toilet bowl from the washing water tank is known to be switched to either the large washing water amount or the small washing water amount.
That is, when performing large washing of the toilet bowl, the drainage valve opens the drainage port while the switching valve with the weight opens the opening of the cylinder by the weight of the weight, and the washing water in the washing water tank By flowing into the cylinder from above and from the opening of the cylinder, it is possible to set a large amount of washing water supplied from the cylinder to the toilet through the drain port.
On the other hand, when performing small washing of the toilet bowl, the switching valve with the weight is lifted, the drain valve opens the drain with the cylinder opening closed, and the washing water in the washing water tank opens the cylinder opening. The amount of washing water supplied to the toilet bowl from the cylinder through the drain outlet can be set as much as it cannot pass through the cylinder, and the washing supplied from the washing water tank to the toilet bowl according to the open / close state of the weighted switching valve The amount of water can be switched.

Thus, since the switching valve with a weight that opens and closes the opening of the cylinder is an important means for switching the amount of washing water, the switching valve is also opened and closed with respect to the weight attached to the switching valve with the weight. It plays an important role in implementation.
Moreover, as a method of attaching the weight of such a switching valve with a weight, at the time of factory production, the weight of the switching valve can be reduced by fitting the members of the switching valve with the weight sandwiched between the members constituting the switching valve. A method of sandwiching and fixing to the switching valve is used.

JP-A-60-184133

However, in such a weight mounting method, there is a problem that at least two parts are required and the cost is increased.
In addition, once such a weight is fixedly attached to the switching valve during factory production, the weight cannot be removed after shipment from the factory, so that the maintenance of the switching valve with the weight cannot be performed. is there.
Furthermore, in order to solve these problems, as a means for easily attaching and detaching the weight from the switching valve, a fastener for elastically fixing the weight from above and below is provided on the switching valve constituted by one part. Although it is conceivable that the weight is detachably attached to the fastener, since the switching valve operates in the vertical direction, if the weight of the weight acts on the relatively weak part of the fastener, Is broken, the weight falls off from the switching valve, the switching valve does not function, and the reliability of the drainage valve device itself is impaired.

  Accordingly, the present invention has been made to solve the above-described problems of the prior art, and is due to the weight falling off from the switching valve for switching the amount of cleaning water supplied from the cleaning water tank to the toilet to the large cleaning and the small cleaning. It aims at providing the drainage valve apparatus which can prevent the malfunctioning of a switching valve, and can improve the reliability of drainage performance, and the washing water tank apparatus provided with the drainage valve apparatus.

In order to achieve the above object, the present invention is a drain valve device for a wash water tank that stores wash water for washing a toilet, and a drain valve that opens and closes a drain port disposed on the bottom surface of the wash water tank; An inner control cylinder member for controlling the vertical movement of the drain valve, and an outer control cylinder member provided so as to surround the drain port, the drain valve, and the inner control cylinder member, wherein the washing water tank A side wall extending upward from the bottom surface of the base plate and opening the top thereof, and a switching valve attached to the opening formed in the side wall so as to be openable and closable, and opening and closing the opening by the switching valve, The outer control cylinder member for controlling the flow rate of the wash water flowing out from the drain port of the wash water tank, and the switching valve of the outer control cylinder member is rotatable on the side wall of the outer control cylinder member. Attached and above outer control A switching valve main body which is rotatable from a predetermined upper position where the opening of the member is closed to the outside of the outer control cylinder member and is rotated to a predetermined lower position where the opening of the outer control cylinder member is opened, and a plate And a weight mounting portion provided on the switching valve body to which the weight is detachably mounted. The weight mounting portion includes a support portion for supporting an upper end and a lower end of the weight, and the support. A fixing portion that is provided on a side of the portion and fixes the side portion of the weight, and the fixing portion attaches the weight and the fixing portion when the weight is attached to or detached from the support portion. It is characterized by comprising elastic contact means that elastically contact each other and allow the weight to pass through the fixed portion.
In the present invention configured as described above, in a state where the weight is attached to the weight mounting portion of the switching valve of the outer control cylinder member, the switching valve body is opened by the load in the vertical direction by the weight. It is possible to rotate between a predetermined upper position where is closed and a predetermined lower position where the opening of the outer control cylinder member is opened. At this time, the load in the vertical direction by the weight acts on the support portion of the weight mounting portion of the switching valve, whereas the weight mounting portion fixing portion of the switching valve for fixing the weight side portion or a relatively weak strength. Since the load in the vertical direction by the weight does not act on the elastic contact means, it is possible to prevent the fixing portion and the elastic contact means from being damaged by the weight load. Therefore, during the opening / closing operation of the opening portion of the outer control cylinder member by the switching valve of the outer control cylinder member, the fixing portion and the elastic contact means of the weight mounting portion of the switching valve are prevented from being damaged and the weight is prevented from falling off the weight mounting portion. be able to. As a result, malfunction of the switching valve can be prevented and the reliability of the drain valve device can be improved.

In the present invention, preferably, when the weight of the switching valve of the outer control cylinder member is attached to the weight mounting portion, the weight and the fixing portion are elastically contacted by the elastic contact means in the horizontal direction. And is inserted between the switching valve main body and the support portion to release the elastic contact, and then fixed to the switching valve main body by the support portion and the side surface of the fixing portion.
In the present invention configured as described above, when the weight is attached to the weight attaching portion of the switching valve of the outer control cylinder member, the weight and the fixed portion are elastically contacted by the elastic contact means while the weight is horizontally oriented. After being moved and inserted between the switching valve body and the support portion to release the elastic contact, the weight can be reliably fixed to the switching valve body by the support portion and the fixing portion. Moreover, even if the switching valve body is rotated between a predetermined upper position where the opening portion of the outer control cylinder member is closed and a predetermined lower position where the opening portion is opened, the switching is performed to fix the side portion of the weight. Since the load in the vertical direction due to the weight does not act on the fixed part of the valve weight mounting part or the relatively weak elastic contact means, the fixed part and the elastic contact means are prevented from being damaged by the weight load. be able to. Further, during the opening / closing operation of the opening of the outer control cylinder member by the switching valve of the outer control cylinder member, the fixing portion and the elastic contact means of the weight mounting portion of the switching valve are damaged, and the weight falls off from the weight mounting portion in the horizontal direction. Can be prevented. Accordingly, it is possible to prevent the switching valve from opening and closing and to improve the reliability of the drain valve device.

In the present invention, preferably, the elastic contact means of the fixed portion has a base end portion protruding a predetermined length outward from the outer surface of the switching valve body, and a predetermined distance from the base end portion to the outer surface of the switching valve body. And a distal end portion that extends upward by a predetermined length, and the elastic fastener further includes the base end portion and the distal end portion when the weight is attached to the weight attaching portion. From the base end so that the weight can pass between the switching valve body and the elastic fastener, and the outer surface of the switching valve body can be elastically deformed in the out-of-plane direction. The elastic deformation portion includes an elastic deformation portion extending to the tip portion, and the elastic deformation portion is configured such that the side surface of the weight and the weight side surface of the elastic fastener come into contact with each other when the weight is completely attached to the weight attachment portion. The elastic deformation returns to the position and the weight is fixed in the horizontal direction. That.
In the present invention configured as described above, after the weight is attached to the weight mounting portion, the weight side surface and the weight side surface of the elastic fastener come into contact with each other and the weight is fixed in the horizontal direction. Even if the switching valve body is rotated between a predetermined upper position where the opening of the outer control cylinder member is closed and a predetermined lower position where the opening is opened, the base of the elastic fastener having a relatively low strength is provided. Since the vertical load by the weight does not act on the end portion, the elastic fastener can be prevented from being damaged by the weight load. Further, during the opening / closing operation of the opening portion of the outer control cylinder member by the switching valve of the outer control cylinder member, the elastic fastener of the weight mounting portion of the switching valve is prevented from being broken and the weight is prevented from falling off from the weight mounting portion in the horizontal direction. be able to. Moreover, the malfunction of the switching valve can be prevented, and the reliability of the drain valve device can be improved.

Moreover, this invention is a washing water tank apparatus provided with the said drain valve apparatus.
In this invention comprised in this way, the washing water tank apparatus which improves the supply performance and reliability of washing water can be provided.

  According to the drain valve device of the present invention and the washing water tank device provided with the drain valve device, the switching valve malfunctions due to the weight falling off from the switching valve for switching the washing water amount supplied from the washing water tank to the toilet bowl to the large washing and the small washing. And the reliability of drainage performance can be improved.

It is sectional drawing of the flush toilet to which the flush water tank apparatus by 1st Embodiment of this invention was applied. It is the perspective view which looked at the structure in a water storage tank from the diagonally forward upper direction in the state which removed the cover about the washing water tank apparatus by 1st Embodiment of this invention. It is a top view which shows the structure in the water storage tank of the washing water tank apparatus by 1st Embodiment of this invention. It is sectional drawing seen along the IV-IV line of FIG. It is a disassembled perspective view of the drain valve device of the washing water tank device by a 1st embodiment of the present invention. It is a perspective view which shows the state which removed the outer side control cylinder member in the drain valve apparatus of the washing water tank apparatus by 1st Embodiment of this invention. It is an enlarged view which shows the flow volume adjustment member attached to the inner side control cylinder member in the drain valve apparatus of the washing water tank apparatus by 1st Embodiment of this invention. It is a front side enlarged view which shows the adjustment member attached to the inner side control cylinder member in the drain valve apparatus of the washing water tank apparatus by 1st Embodiment of this invention. It is a back side enlarged view which shows the adjustment member of an inner side control cylinder member in the drain valve apparatus of the wash water tank apparatus by 1st Embodiment of this invention. It is sectional drawing seen along the XX line of FIG. It is the perspective view which looked at the drain valve apparatus of the washing water tank apparatus by 1st Embodiment of this invention from back diagonally upward. It is a front view which shows the drain valve apparatus of the washing water tank apparatus by 1st Embodiment of this invention. In the drain valve device of the flush water tank device according to the first embodiment of the present invention, the positioning concave portion of the female fitting portion on the back side of the outer control cylinder member and the frame shape of the male fitting portion of the distal flow rate adjusting member It is an expansion perspective view which shows a fitting state with protrusion. In the drain valve device of the flush water tank apparatus according to the first embodiment of the present invention, the positioning concave portion of the female fitting portion on the front side of the outer control cylinder member and the claw shape of the male fitting portion of the distal flow rate adjusting member It is an expansion perspective view which shows a fitting state with protrusion. In the drain valve device of the flush water tank apparatus according to the first embodiment of the present invention, the frame-like shape of the male fitting portion of the distal flow rate adjusting member in the positioning concave portion of the female fitting portion on the back side of the outer control cylinder member After the projection is fitted, the state until the claw-like projection of the male fitting portion of the distal flow rate adjusting member is fitted into the positioning concave portion of the female fitting portion on the front side of the outer control cylinder member FIG. In the drain valve device of the flush water tank apparatus according to the first embodiment of the present invention, the positioning concave portion of the female fitting portion on the front side of the outer control cylinder member and the claw shape of the male fitting portion of the distal flow rate adjusting member It is an expanded plane sectional view which shows a fitting part with protrusion. FIG. 17 (a) is a perspective view showing a state before the weight is attached to the switching valve of the drain valve device of the flush water tank device according to the first embodiment of the present invention, and FIG. FIG. 17C is a perspective view illustrating a state in which a weight is being attached to the switching valve of the drain valve device of the flush water tank device according to the first embodiment, and FIG. 17C is a diagram of the flush water tank device according to the first embodiment of the present invention. It is a perspective view which shows the state after the completion of attachment of the weight in the switching valve of a drain valve apparatus. It is a front view which shows the switching valve in the drain valve apparatus of the washing water tank apparatus by 1st Embodiment of this invention. FIG. 19 (a) is a front sectional view showing a drain valve device in a state before the start of drainage in the large washing mode of the flush water tank device according to the first embodiment of the present invention, and FIG. 19 (b) is a diagram showing the present invention. It is front sectional drawing which shows the drain valve apparatus of the state immediately after the drainage start in the large washing mode of the washing water tank apparatus by 1st Embodiment of this, FIG.19 (c) is a washing water tank by 1st Embodiment of this invention. It is front sectional drawing which shows the drain valve apparatus of the state in the middle of draining in the large washing mode of an apparatus, FIG.19 (d) is after the drainage completion | finish in the large washing mode of the washing water tank apparatus by 1st Embodiment of this invention. It is front sectional drawing which shows the drain valve apparatus of a state. FIG. 20A is a front sectional view showing the drain valve device in a state before the start of drainage in the small washing mode of the flush water tank device according to the first embodiment of the present invention, and FIG. It is front sectional drawing which shows the drain valve apparatus of the state immediately after the drainage start in the small washing mode of the washing water tank apparatus by 1st Embodiment of this, FIG.20 (c) is a washing water tank by 1st Embodiment of this invention. It is front sectional drawing which shows the drain valve apparatus in the state in the middle of draining in the small washing mode of an apparatus, FIG.20 (d) is after the completion | finish of drainage in the small washing mode of the washing water tank apparatus by 1st Embodiment of this invention. It is front sectional drawing which shows the drain valve apparatus of a state. FIG. 21 (a) is a side view showing a state before the weight is attached to the switching valve of the drain valve device of the flush water tank device according to the second embodiment of the present invention, and FIG. FIG. 21C is a side view showing a state in which a weight is being attached to the switching valve of the drain valve device of the flush water tank device according to the second embodiment, and FIG. 21C is a diagram of the flush water tank device according to the first embodiment of the present invention. It is a side view which shows the state after the completion of attachment of the weight in the switching valve of a drain valve apparatus. It is a front view which shows the switching valve in the drain valve apparatus of the washing water tank apparatus by 2nd Embodiment of this invention.

Next, with reference to the accompanying drawings, a drain valve device according to a first embodiment of the present invention and a washing water tank device including the drain valve device will be described.
First, a flush toilet to which the flush water tank apparatus according to the first embodiment of the present invention is applied will be described with reference to FIG.
FIG. 1 is a sectional view of a flush toilet to which a flush water tank apparatus according to a first embodiment of the present invention is applied.

As shown in FIG. 1, reference numeral 1 indicates a flush toilet bowl. This toilet bowl 1 includes a toilet body 2, and the toilet body 2 has a bowl portion 4, a water conduit 6, and a bowl portion 4. A trap pipe 8 communicating with the lower part of each is formed.
On the upper edge of the bowl portion 4 of the toilet body 2, there are formed a rim 10 overhanging on the inside and a first water discharge port 12 for discharging the wash water supplied from the water conduit 6. The wash water discharged from the water descends while swirling to wash the bowl portion.

Below the bowl portion 4, there is formed a water storage portion 14 whose storage surface W ₀ is indicated by a one-dot chain line. Below the water reservoir 14, an inlet 8a of the drain trap pipe 8 opens, and an ascending path 8b extends rearward from the inlet 8a. A descending path 8c continues to the ascending path 8b, and a lower end of the descending path 8c is connected to a discharge pipe (not shown) under the floor via a drain socket (not shown). In addition, a second water discharge port 16 for discharging the cleaning water supplied from the water conduit 6 is formed above the storage surface W ₀ of the bowl portion 4, and the cleaning water discharged from the second water discharge port 16 A swirling flow that swirls the water stored in the water storage section 14 in the vertical direction is generated.

A flush water tank device 18 (details will be described later) for storing flush water supplied to the toilet body 2 is provided above the water conduit 6 of the toilet body 2.
The washing water tank device 18 is placed on the exterior tank 20 made of earthenware, the storage tank 22 in which the washing water for washing the flush toilet 1 is stored, and the exterior tank 20. The lid 24 is provided.
A drain port 22 a that communicates with the water conduit 6 of the toilet body 2 is formed at the bottom of the water storage tank 22, and the wash water in the water storage tank 22 is drained into the water conduit 6. In addition, the amount of washing water stored in the water storage tank 22 varies depending on the type of toilet bowl.
In addition, in the flush water tank apparatus 18 by this embodiment, it is applicable also to other types of flush toilets (for example, siphon flush toilet etc.) other than the wash-off type mentioned above.

Next, the details of the washing water tank apparatus 18 will be described with reference to FIGS.
FIG. 2 is a perspective view of the structure of the water storage tank as viewed from the front and obliquely above with the lid removed from the flush water tank apparatus according to the first embodiment of the present invention, and FIG. 3 is the first view of the present invention. It is a top view which shows the structure in the water storage tank of the washing water tank apparatus by embodiment, and FIG. 4 is sectional drawing seen along the IV-IV line of FIG. In FIG. 4, the water stop water level when the water storage tank 22 is full is indicated by WL0.

  As shown in FIGS. 2 to 4, in the water storage tank 22 of the cleaning water tank device 18, the water supply device 26 that supplies the cleaning water into the water storage tank 22, and the cleaning water stored in the water storage tank 22 is drained. There is provided a drain valve device 28 that opens the mouth 22a and allows it to flow into the water conduit 6 of the toilet body 2.

  The water supply device 26 is connected to an external water supply source and extends upward from the bottom of the water storage tank 22. The water supply device 26 is attached to the upper end of the water supply pipe 30 and is supplied from the water supply pipe 30. A water supply valve 32 that switches between water discharge and water stop inside, and a float 34 that moves up and down according to fluctuations in the water level in the water storage tank 22 and switches between water discharge and water stop by the water supply valve 32 are provided.

A water discharge port 36 is opened at the lower end of the outer periphery of the water supply pipe 30, and wash water from the water supply valve 32 is discharged from the water discharge port 36 into the water storage tank 22.
The water supply device 26 further includes a refill pipe 38 connected to the water supply valve 32, and a downstream end of the refill pipe 38 is located above an upper end opening of an overflow pipe 40 of the drain valve device 28 described later.

  In the water supply device 26, when the wash water in the water storage tank 22 is drained to the toilet by the drain valve device 28 described later, the water level of the wash water is lowered and the float 34 is lowered, thereby opening the water supply valve 32. Water discharge from the water discharge port 36 is started, and water discharge into the water storage tank 22 is started. Next, when water discharge continues and the water level rises, the float 34 also rises, whereby the water supply valve 32 is closed and the water discharge port 36 is stopped. Thereby, the water level of the washing water in the water storage tank 22 is maintained at the predetermined water level.

Next, the drain valve device 28 will be described in detail with reference to FIGS.
FIG. 5 is an exploded perspective view of the drain valve device of the flush water tank device according to the first embodiment of the present invention.
As shown in FIGS. 2 to 5, the drain valve device 28 has an operation lever 42 attached to the outside of the water storage tank 22, one end attached to the operation lever 42, and the other end extended into the water storage tank 22. A rotating shaft 44 that rotates by operating the lever 42 is provided.

  Here, in the present embodiment, as an example, the operation lever 42 and the rotation shaft 44 will be described as a manual operation mode in which the user directly rotates the operation lever 42 to rotate the rotation shaft 44. However, the present invention is not limited to such a configuration, and driving means such as a motor for rotating the operation lever 42 and the rotating shaft 44 is provided, and an operation button (not shown) or a human sensor (not shown) set outside is provided. The operation mode may be such that the operation of the drive means is automatically controlled by a command signal from

A ball chain pulling member 46 that rotates about the central axis 44 a of the rotating shaft 44 along with the rotation of the rotating shaft 44 is attached to the other end of the rotating shaft 44 integrally with the rotating shaft 44.
In this ball chain pulling member 46, a first ball 48 attached with a first ball chain 48 that moves up and down by the rotation of the rotation shaft 44 on one side with respect to the central axis 44 a of the rotation shaft 44. A second ball chain is provided with a chain mounting portion 46a, and a second ball chain 50 is mounted on the other side of the central axis 44a of the rotation shaft 44 so as to move up and down by the rotation of the rotation shaft 44. A mounting portion 46b is provided.

The lower ends of the first ball chain 48 and the second ball chain 50 are respectively attached to a first ball chain mounting portion 52a and a second ball chain mounting portion 52b of the float member 52 described later.
Further, in the ball chain pulling member 46, the third ball chain 54 adapted to move up and down by the rotation of the rotary shaft 44 is mounted at a predetermined position adjacent to the operation lever 42 side from the second ball chain mounting portion 46b. A third ball chain attaching portion 46c is provided, and the lower end of the third ball chain 54 is attached to a third ball chain attaching portion 56a of a switching valve 56 described later.

Further, when the operation lever 42 is rotated in one direction, the ball chain pulling member 46 rotates in a predetermined direction together with the rotation shaft 44, and the first ball chain 50 is slackened with the second ball chain 50 and the third ball chain 54 slackened. Only 48 is pulled up by the ball chain pulling member 46, and the valve body 84, which will be described later, rises together with the float member 52 while the switching valve 56 is open, so that drainage in the large flush mode of the toilet described later is started. It has become.
On the other hand, when the operation lever 42 is rotated to the other side, the second ball chain 50 and the third ball chain 54 are pulled up by the ball chain pulling member 46 in a state where the first ball chain 48 is slackened, and the float member 52 and the valve body. As 84 rises, the switching valve 56 closes, and drainage in the small flush mode of the toilet, which will be described later, is started.

  Further, the central axis 44a of the rotating shaft 44 passes through a central axis 58a of a drain valve unit 58, which will be described later, and the interval between the first ball chain mounting portion 46a and the second ball chain mounting portion 46b of the ball chain pulling member 46 is The distance between the first ball chain mounting portion 52a and the second ball chain mounting portion 52b of the float member 52 is set to be substantially the same.

  As shown in FIG. 5, the drain valve device 28 is attached to the bottom surface of the water storage tank 22 and forms a drain port 22 a communicating with the water conduit 6 of the toilet body 2, and the drain port unit 60. A drain valve unit 58 attached to the upper end and an outer control cylinder member 62 detachably attached to the drain port unit 60 from above are provided.

As shown in FIG. 5, the drain port unit 60 of the drain valve device 28 includes a drain port forming member 64 that is attached to a predetermined position on the bottom surface of the water storage tank 22 to form the drain port 22 a.
The lower end portion of the drain port forming member 64 penetrates the bottom surface of the water storage tank 22 and is fastened by a fastening member 68 via a seal member 66, and the drain port forming member 64 is fixed to the bottom surface of the water storage tank 22.

Further, the drain port forming member 64 includes a drain port upper edge portion 70 that forms the upper edge of the drain port 22a, and the outer control cylinder member 62 is located at a predetermined diagonal position on the outer periphery of the drain port upper edge portion 70. A holding protrusion 72 for attachment that is detachably attached from the top is formed.
Further, at predetermined diagonal positions on the outer periphery of the upper end opening 74 of the drain port forming member 64, there are mounting holding projections 78 to which an inner control cylinder member 76 of the drain valve unit 60 described later is detachably mounted from above. Is formed.
Further, the drain port forming member 64 includes a plurality of ribs 80 extending in the vertical direction at a predetermined interval along the circumferential direction between the drain port upper edge portion 70 and the upper end opening portion 74. A plurality of communication ports 82 are formed for allowing the cleaning water outside the inner control cylinder member 76 to flow into the drain port 22a.

  Next, as shown in FIG. 5, the drain valve unit 58 of the drain valve device 28 includes a valve body 84, an overflow pipe 40, an inner control cylinder member 76, a float member 52, an overflow pipe mounting member 86, A refill pipe mounting member 88 is provided.

  The valve body 84 is formed of a seal member such as a seat packing, and is fitted and fixed to the valve body holding portion 40a at the lower end portion of the overflow pipe 40 as shown in FIG. It functions as a drain valve that opens and closes the opening 22a.

  The inner control cylinder member 76 functions to control the vertical movement of the valve body 84, and has an opening 76a for storing the cleaning water and discharging the stored cleaning water at a predetermined flow rate. A substantially cylindrical water storage portion 76b formed on the side surface, a substantially cylindrical guide portion 76c extending upward from the center of the bottom of the water storage portion 76b, and a drain port unit 60 formed at the lower end of the water storage portion 76b. One or a plurality of engaging grooves 76d that are engaged with the holding projections 78 of the drain port forming member 64 are provided. The engaging groove 76d forms a substantially L-shaped keyhole-shaped groove, and after the control cylinder mounting holding projection 78 can be inserted from below, the engaging groove 76d is moved in the horizontal direction to thereby attach the control cylinder. The holding projection 78 can be locked.

  Further, a flow rate adjusting member 92, which will be described in detail later, is attached to the opening 76a of the water storage portion 76b of the inner control cylinder member 76. By changing the mounting position of the flow rate adjusting member 92 in the vertical direction, the opening 76a is cut off. The area can be adjusted.

Further, the float member 52 is formed in a thin and substantially annular shape, and is accommodated on the inner peripheral side of the water storage portion 76b of the inner control cylinder member 76 and on the outer peripheral side of the guide portion 76c, and the float portion 52c The bottom part 52d attached to the lower end is provided, and an internal space is formed by the inside of the float part 52c and the bottom part 52d. The float portion 52c and the bottom portion 52d are accommodated in a state of being floated in the water storage portion 76b of the inner control cylinder member 76 due to buoyancy when the wash water is stored in the water storage portion 76b of the inner control cylinder member 76. As the cleaning water level in the water storage part 76b of the inner control cylinder member 76 decreases, the water level is guided by the guide part 76c of the inner control cylinder member 76 and descends.
Furthermore, after the float member 52 is fixed to the upper end of the float portion 52c and extends upward by a predetermined distance, the float member 52 extends in an arch shape radially inward and is attached to the upper end of the cylindrical portion 40b of the overflow pipe 40. It has.

A cylindrical portion 40b extending in a cylindrical shape in the vertical direction of the overflow pipe 40 is inserted on the inner peripheral side of the guide portion 76c of the inner control cylinder member 76 and is guided so as to be slidable in the vertical direction.
Further, the upper end of the cylindrical portion 40 b of the overflow pipe 40 is attached to the overflow pipe attachment portion 52 e of the float member 52 and is fixed by the overflow pipe attachment member 86.
The overflow pipe attachment member 86 substantially forms an inlet 86a at the upper end of the overflow pipe 40 into which wash water that exceeds a predetermined water level (full water level) in the wash water tank 22 flows.
Further, the inlet 86a at the upper end of the overflow pipe 40 has a trumpet shape that smoothly spreads upward and outward with respect to the pipe diameter of the overflow pipe 40, and exceeds a predetermined water level (full water level) in the wash water tank 22. The wash water is more reliably discharged to the outside of the wash water tank 22 by the overflow pipe 40.

  Further, the refill pipe mounting member 88 includes a nozzle part 88a to which the downstream end of the above-described refill pipe 38 is connected, and the opening at the lower end of the nozzle part 88a is located above the inlet 86a of the overflow pipe 40. ing.

Next, as shown in FIG. 5, the outer control cylinder member 62 includes a cylinder body 90 having a substantially rectangular cross-sectional shape and an open top. The lower end portion of the cylindrical body 90 forms an opening into which the drain port forming member 64 of the drain port unit 60 can be inserted in the vertical direction, and the cylindrical body 90 is attached to the periphery of the lower end portion of the cylindrical body 90. By rotating around a central axis (corresponding to the central axis 58a of the drain valve unit 58), one or more engaging grooves 90a that can be attached to and detached from the holding projection 72 of the drain port forming member 64 of the drain port unit 60 are provided. Is provided.
The engaging groove 90a forms a substantially L-shaped keyhole-like groove, and after the holding protrusion 72 can be inserted from below, the engaging groove 90a can be locked to the holding protrusion 72 by moving in the horizontal direction. It has become.

  Further, in a state where the engaging groove 90 a of the cylinder body 90 is engaged with the holding projection 72 of the drain port forming member 64 of the drain port unit 60, the side wall 90 b of the cylinder body 90 on the side proximal to the operation lever 42. (Hereinafter referred to as “proximal side wall 90 b”) extends upward from the bottom surface of the washing water tank 22 so as to surround a part of the drain port unit 60 and the inner control cylinder member 76. The side wall 90b is formed with a cleaning mode switching opening 90c that penetrates the proximal side wall 90b.

  Further, a switching valve 56 (details will be described later) that can open and close the opening 90c is attached to the proximal side wall 90b of the cylindrical body 90, and a weight 56b can be attached to and detached from the switching valve 56. Is attached. In the state where the switching valve 56 opens the opening 90c, drainage is performed in the large cleaning mode, and in the state where the switching valve 56 closes the opening 90c, drainage is performed in the small cleaning mode. .

A proximal opening 90d for flow rate adjustment is formed above the opening 90c in the proximal side wall 90b of the cylindrical body 90, and details will be described later in these proximal openings 90d. A proximal flow adjustment member 94 is attached.
Similarly, a distal side opening 90d ′ for adjusting the flow rate is formed in a side wall 90b ′ (hereinafter referred to as “distal side wall 90d ′”) facing the proximal side wall 90b of the cylindrical body 90, A distal flow rate adjusting member 96, which will be described in detail later, is attached to the distal opening 90d ′.
By changing the mounting position of each of the proximal flow rate adjusting member 94 and the distal flow rate adjusting member 96 in the vertical direction and adjusting the opening cross-sectional areas of the corresponding openings 90d and 90d ′, In the cleaning mode, it is possible to adjust the flow rate of the cleaning water in which the cleaning water in the water storage tank 22 flows into the cylindrical body 90 from the openings 90d and 90d ′ of the cylindrical body 90, and to the outside of the cleaning water tank 22. The amount of washing water that flows out can be adjusted.

  Further, as shown in FIG. 5, the engagement groove 76 d of the inner control cylinder member 76 is engaged with the control cylinder mounting holding projection 78 of the drain port forming member 64 of the drain port unit 60, and the cylinder body 90 is engaged. In the state where the groove 90a is engaged with the holding projection 72 of the drain port forming member 64 of the drain port unit 60, the groove 90a is formed on the side surface of the drain port forming member 64 extending from the bottom of the inner control cylinder member 76 to the drain port 22a. The plurality of communication ports 82 are communication ports that allow the inside of the cylindrical body 90 to communicate with the drainage port 22a. The opening 90c for switching the cleaning mode of the cylindrical body 90 is formed by the communication ports 82. It is arranged at a height position below the upper end.

Further, the valve body 84 of the drain valve unit 58 immediately after the start of drainage in the large washing mode and the small washing mode is a predetermined maximum that abuts against the bottom of the inner control cylinder member 76, like the valve body 84 indicated by a chain line in FIG. The valve body 84 is set to a height position higher than the upper end of the cleaning mode switching opening 90c of the cylinder body 90.
Further, as shown in FIG. 4, the opening 76 a of the water storage portion 76 b of the inner control cylinder member 76 is also set to a height position higher than the upper end of the cleaning mode switching opening 90 c of the cylinder body 90.

Next, the details of the flow rate adjusting member 92 attached to the inner control cylinder member 76 of the drain valve device 28 will be described with reference to FIGS.
FIG. 6 is a perspective view showing a state in which the outer control cylinder member is removed from the drain valve device of the flush water tank apparatus according to the first embodiment of the present invention, and FIG. 7 is a flush water tank apparatus according to the first embodiment of the present invention. It is an enlarged view which shows the adjustment member which adjusts the opening cross-sectional area of the opening part of an inner side control cylinder member in this drain valve apparatus.
FIG. 8 is an enlarged front side view showing an adjusting member attached to the inner control cylinder member in the drain valve device of the flush water tank apparatus according to the first embodiment of the present invention, and FIG. 9 is a first embodiment of the present invention. FIG. 10 is a rear side enlarged view showing an adjustment member of the inner control cylinder member in the drain valve device of the flush water tank device according to the embodiment, and FIG. 10 is a cross-sectional view taken along line XX of FIG.

As shown in FIGS. 6 to 10, each of the inner control cylinder member 76 and the flow rate adjusting member 92 includes fitting portions 98 and 100 that are fitted to each other, and the fitting portion of the inner control cylinder member 76. 98 is a female-side fitting portion (hereinafter referred to as “female-side fitting portion 98”), and the fitting portion 100 of the flow rate adjusting member 92 can be fitted to the female-side fitting portion 98 of the inner control cylinder member 76. It is a male fitting part (hereinafter referred to as “male fitting part 100”).
The female side fitting portion 98 of the inner control cylinder member 76 is provided integrally with the wall portions 76e on both sides of the opening 76a of the inner control cylinder member 76, and a plurality of positioning members for positioning the mounting position of the flow rate adjusting member 92 are provided. A recess 98a is provided. Each of the plurality of positioning recesses 98a is recessed inward of the wall portion 76e of the inner control cylinder member 76, and is arranged substantially linearly in the vertical direction.
Each of the plurality of positioning recesses 98a is arranged substantially linearly in the horizontal direction on the upper and lower wall portions 76e of the opening 76a of the inner control cylinder member 76 so that the flow rate adjusting member 92 can be positioned in the horizontal direction. Good.

The flow rate adjusting member 92 includes a shielding portion 92 a that shields the opening 76 a of the inner control cylinder member 76 when the flow rate adjustment member 92 is attached to a predetermined attachment position of the inner control cylinder member 76. In the state of the attachment position of the flow rate adjusting member 92 shown in FIG. 7, the shielding portion 92 a is in a state of shielding the upper opening region from a height position substantially half of the opening 76 a of the inner control cylinder member 76.
Further, as shown in FIG. 10, the male side fitting portion 100 of the flow rate adjusting member 92 is provided at predetermined intervals in the vertical direction on both side portions of the shielding portion 92a, and the female side of the inner control cylinder member 76 is provided. A claw-like projection 100a that can be fitted into the positioning recess 98a of the side fitting portion 98 is provided.
For example, the opening cross-sectional area of the opening 76a of the inner control cylinder member 76 increases as the mounting position for attaching the claw-like projections 100a of the flow rate adjusting member 92 to the positioning recess 98a of the inner control cylinder member 76 is set upward. Further, the flow rate of the washing water in the water storage portion 76b of the inner control cylinder member 76 flowing out from the opening 76a during the draining operation of the drain valve device 28 increases, and the float portion 52c and the valve body 84 during drainage descend more quickly. It has become.

Furthermore, the vertical intervals d1 in the concave portions of the plurality of positioning concave portions 98a of the female side fitting portion 98 of the inner control cylinder member 76 are all equal, and the positioning of the female side fitting portion 98 of the inner control cylinder member 76 is the same. In the state in which the claw-like protrusion 100a of the male fitting portion 100 of the flow rate adjusting member 92 is fitted to the concave portion 98a, the fitting release operation of the fitting portions 98, 100 by the operator's fingers becomes impossible. Thus, it is preferable to set it smaller than the width of the operator's fingers.
That is, the vertical distance d1 in the positioning recess 98a is preferably set to 13 mm or less, and more preferably set to 5 mm or less.

  In the present embodiment, the fitting between the inner control cylinder member 76 and the flow rate adjusting member 92 of the drain valve device 28 is, for example, the fitting portion 98 of the inner control cylinder member 76 as the female fitting portion. However, the embodiment is not limited to such a configuration, and the fitting portion 98 of the inner control cylinder member 76 is the male fitting portion. The fitting portion 100 of the flow rate adjusting member 92 may be a female fitting portion.

Next, referring to FIGS. 11 to 16, details of the outer control cylinder member 62 of the drain valve device 28 and the proximal flow rate adjustment member 94 and the distal flow rate adjustment member 96 attached to the outer control cylinder member 62. Will be described.
FIG. 11 is a perspective view of the drain valve device of the cleaning water tank apparatus according to the first embodiment of the present invention as viewed from the rear and obliquely above, and FIG. 12 shows the drainage of the cleaning water tank apparatus according to the first embodiment of the present invention. It is a front view which shows a valve apparatus.
FIG. 13 shows a positioning concave portion of the female fitting portion on the back side of the outer control cylinder member and the male side of the distal flow rate adjusting member in the drain valve device of the flush water tank device according to the first embodiment of the present invention. FIG. 14 is an enlarged perspective view showing a fitting state of the fitting portion with the frame-like protrusion, and FIG. 14 is a female on the front side of the outer control cylinder member in the drain valve device of the flush water tank device according to the first embodiment of the present invention. It is an expansion perspective view which shows the fitting state of the recessed part for positioning of a side fitting part, and the claw-shaped protrusion of the male side fitting part of a distal side flow volume adjustment member.
Furthermore, FIG. 15 shows the male side of the distal flow rate adjusting member in the positioning recess of the female side fitting portion on the back side of the outer control cylinder member in the drain valve device of the flush water tank device according to the first embodiment of the present invention. After the frame-like projection of the fitting portion is fitted, the claw-like projection of the male fitting portion of the distal flow rate adjusting member is fitted into the positioning concave portion of the female fitting portion on the front side of the outer control cylinder member. It is a partial plane sectional view which shows the state until it unites.
FIG. 16 shows a positioning recess of the female fitting portion on the front side of the outer control cylinder member and the male side of the distal flow rate adjustment member in the drain valve device of the flush water tank device according to the first embodiment of the present invention. It is an expanded plane sectional view which shows a fitting part with the claw-shaped protrusion of a fitting part.

As shown in FIGS. 5 and 11 to 16, in the proximal side opening 90 d formed in the proximal side wall 90 b of the cylinder body 90 of the outer control cylinder member 62, the opening cross-sectional shape is a rectangular shape. Two openings having the same opening cross-sectional area are arranged in the front-rear direction.
Similarly, in the distal side opening 90d ′ formed in the distal side wall 90b ′ of the cylinder body 90 of the outer control cylinder member 62, the opening cross-sectional shape is a rectangular shape, and the two opening cross-sectional areas are equal. The opening is arranged in the front-rear direction.
The upper edges of both openings of the proximal opening 90d and the upper edges of both openings 90d 'are at substantially the same height, but both openings of the distal opening 90d' The lower edge is located above the upper edge of the cleaning mode switching opening 90c and below the lower edge of both openings of the proximal opening 90d.
Therefore, in a state where all the opening cross sections of both openings 90d and 90d ′ are opened, the total opening cross sectional area of the opening 90d is smaller than the total opening cross sectional area of the opening 90d ′.

As shown in FIGS. 5 and 11 to 16, the outer control cylinder member 62 is integrally provided on the front side of the proximal side wall 90 b of the cylinder body 90 and is fitted on the male side of the proximal flow rate adjustment member 94. A female-side fitting portion 104 that fits with the mating portion 102, and a female-side fitting portion 108 that is provided on the back side of the cylindrical body 90 and fits with the male-side fitting portion 106 of the proximal flow rate adjusting member 94. It has.
Further, the outer control cylinder member 62 is provided integrally with the back surface side of the cylinder body 90, and a female side fitting part 104 ′ that fits with the male side fitting part 102 ′ of the distal flow rate adjusting member 96; A female side fitting portion 108 ′ is provided on the front side of the distal side wall 90 b ′ of the cylindrical body 90 and fitted with the male side fitting portion 106 ′ of the distal flow rate adjusting member 96.

The female fitting portions 104 and 108 of the outer control cylinder member 62 include a plurality of positioning concave portions 104a and 108a for positioning the attachment position of the proximal flow rate adjusting member 94, respectively. Each of the plurality of positioning recesses 104a and 108a is recessed inward of the proximal side wall 92b of the outer control cylinder member 62, and is arranged substantially linearly in the vertical direction.
Similarly, the female side fitting portions 104 ′ and 108 ′ of the outer control cylinder member 62 include a plurality of positioning recesses 104 a ′ and 108 a ′ for positioning the mounting position of the distal flow rate adjusting member 96, respectively. Each of the plurality of positioning recesses 104a ′ and 108a ′ is recessed inward of the distal side wall 92b ′ of the outer control cylinder member 62, and is arranged substantially linearly in the vertical direction.

In addition, although the structure of each recessed part of the positioning recessed part 104a of the female side fitting part 104 of the outer side control cylinder member 62 and the positioning recessed part 104a 'of female side fitting part 104' is the mutually same structure. The number of positioning recesses 104a ′ is greater than the number of positioning recesses 104a.
Further, the configuration of the recesses of the positioning concave portion 108a of the female side fitting portion 108 of the outer control cylinder member 62 and the positioning concave portion 108a 'of the female side fitting portion 108' is the same as each other. The number of the positioning recesses 108a ′ is arranged larger than the number of the recesses of the positioning recess 108a.

Further, in the proximal flow rate adjusting member 94 and the distal flow rate adjusting member 96 shown in FIGS. 4 and 11 to 14, when the respective attachment positions with respect to the outer control cylinder member 62 are set to the lowest attachment positions. However, as the attachment positions of the proximal flow rate adjusting member 94 and the distal flow rate adjusting member 96 with respect to the outer control cylinder member 62 are set downward, the corresponding openings 90d and 90d are respectively shown. The opening cross-sectional area of 'is set to be large.
As the opening cross-sectional areas of the openings 90d and 90d ′ are set larger, the cleaning water in the water storage tank 22 is discharged from the openings 90d and 90d ′ of the cylinder body 90 during the draining operation of the drain valve device 28 in the small cleaning mode. So that the flow rate of the wash water flowing into the cylindrical body 90 increases from the drain port 22a of the wash water tank 22 to the toilet body 2 so that the amount of wash water in the small washing mode can be set large. It has become.
Incidentally, when each of the attachment positions of the proximal flow rate adjusting member 94 and the distal flow rate adjusting member 96 with respect to the outer control cylinder member 62 is set at the uppermost position, the openings 90d and 90d ′ are provided with the proximal flow rate adjusting member. Each of the member 94 and the distal flow rate adjusting member 96 is closed, and the washing water in the water storage tank 22 is discharged from the openings 90d and 90d ′ of the cylinder body 90 when the drain valve device 28 is drained. Therefore, the amount of washing water in the small washing mode supplied from the drain port 22a of the washing water tank 22 to the toilet body 2 can be set to the minimum.

The proximal flow rate adjusting member 94 includes a shielding portion 94 a that shields the proximal opening 90 d of the outer control cylinder member 62 when the proximal flow rate adjustment member 94 is attached to a predetermined attachment position of the outer control cylinder member 62.
The male fitting portion 102 of the proximal flow rate adjusting member 94 is provided on the front side of the shielding portion 94a of the proximal flow rate adjusting member 94 and forms a long hole 102a extending in the vertical direction. The projection 102b is provided.
Further, the male fitting portion 106 of the proximal flow rate adjusting member 94 is provided on the side portion on the back side of the shielding portion 94 a of the proximal flow adjusting member 94, and the female fitting portion of the outer control cylinder member 62 is provided. A claw-like projection 106a that can be fitted into the positioning recess 108a is provided.

Similarly, the distal flow rate adjusting member 96 includes a shielding portion 96a that shields the distal opening 90d ′ of the outer control cylinder member 62 when the distal flow adjustment member 96 is attached to a predetermined attachment position of the outer control cylinder member 62. ing.
Further, the male fitting portion 102 ′ of the distal flow rate adjustment member 96 is provided on the back side of the shielding portion 96 a of the distal flow rate adjustment member 96 to form a long hole 102 a ′ extending in the vertical direction. A frame-like protrusion 102b ′ is provided.
Further, the male fitting portion 106 ′ of the distal flow rate adjusting member 96 is provided on the front side portion of the shielding portion 96 a of the distal flow rate adjusting member 96, and the female fitting of the outer control cylinder member 62 is performed. A claw-like projection 106a ′ that can be fitted into the positioning recess 108a ′ of the portion 108 ′ is provided.

The vertical length H of the shielding portion 94a of the proximal flow rate adjusting member 94 is shorter than the vertical length H ′ of the shielding portion 96a of the distal flow rate adjusting member 96, but the shielding is performed. The length L in the front-rear direction of the portion 94a and the length L ′ in the front-rear direction of the shielding portion 96a are equal to each other.
The configuration of the frame-like protrusion 102b of the male fitting portion 102 of the proximal flow rate adjusting member 94 and the structure of the frame-like protrusion 102b 'of the male fitting portion 102' of the distal flow rate adjusting member 96 are the same. The configurations of the claw-like projections 106a of the male fitting portion 106 of the proximal flow rate adjusting member 94 and the claw-like projections 106a 'of the male fitting portion 106' of the distal flow rate adjusting member 96 are also described. It has the same configuration.

Therefore, hereinafter, the fitting state between the frame-like protrusion 102b of the male fitting portion 102 of the proximal flow rate adjusting member 94 and the positioning concave portion 104a of the female fitting portion 104 of the outer control cylinder member 62 will be described with reference to FIG. 13, the frame-like protrusion 102 b ′ of the male fitting portion 102 ′ of the distal flow rate adjusting member 96 shown in FIG. 13 and the positioning concave portion 104 a ′ of the female fitting portion 104 ′ of the outer control cylinder member 62. The description is omitted because it is equal to the combined state.
14 also shows the fitting state between the claw-like projection 106a of the male fitting portion 106 of the proximal flow rate adjusting member 94 and the positioning concave portion 108a of the female fitting portion 108 of the outer control cylinder member 62. The fitting state between the claw-like projection 106a 'of the male fitting portion 106' of the distal flow rate adjusting member 96 shown and the positioning recess 108a 'of the female fitting portion 108' of the outer control cylinder member 62 is shown. Since this is the same, the description is omitted.

As shown in FIG. 13, a frame-like projection 102b ′ forming an elongated hole 102a ′ extending in the vertical direction in the male fitting portion 102 ′ of the distal flow rate adjusting member 96 has an upper end portion 102c ′ and a lower end portion 102d. 'And a column part 102e' extending upward by a predetermined length from the lower end part 102d 'to the upper end part 102c'.
Further, at the corner of the cylinder body 90 where the female side fitting portion 104 ′ of the outer control cylinder member 62 is located, the female side fitting portion 104 ′ of the outer control cylinder member 62 protrudes from the inside toward the outside. A plurality of recessed portion forming protrusions 104b ′ forming each positioning recessed portion 104a ′ are arranged in the vertical direction.
Here, the vertical spacing d2 in each positioning recess 104a ′ is equal, corresponds to the vertical spacing between adjacent projections of each recess forming projection 104b ′, and is larger than the width of the finger of the operator. It is preferable to set a small value.
That is, the vertical distance d2 in each positioning recess 104a ′ is preferably set to 13 mm or less, and more preferably set to 5 mm or less.

Next, with reference to FIGS. 13 to 16, a process of attaching the distal flow rate adjusting member 96 to the outer control cylinder member 62 will be described.
As shown in FIGS. 13 and 15, when the distal flow rate adjusting member 96 is attached to the outer control cylinder member 62, first, each positioning recess 104 a ′ of the female side fitting portion 104 ′ of the outer control cylinder member 62 is formed. A frame-like protrusion 102b ′ of the distal flow rate adjusting member 96 is formed in a recessed part 90g formed between the plurality of recessed part forming protrusions 104b ′ to be formed and the side face 90f of the rear side wall part 90e of the cylindrical body 90. The column portion 102e 'is fitted.
Then, the distal flow rate adjusting member 96 is rotated toward the outer control cylinder member 62 around the column portion 102e ′, whereby the upper end portion 102c ′ of the frame-shaped protrusion 102b ′ of the distal flow rate adjusting member 96 is rotated. The lower end portion 102d ′ is fitted into the positioning recess 104a ′ of the female side fitting portion 104 ′ of the outer control cylinder member 62 facing each other.

Next, the claw-like projections 106a ′ of the male fitting portion 106 ′ of the distal flow rate adjusting member 96 are placed in the positioning recesses 108a ′ of the female fitting portion 108 ′ of the outer control cylinder member 62 opposite thereto. After the insertion, the distal end portion 106b 'of the claw-like projection 106a' is fitted into a recess 108b 'formed in the positioning recess 108a', whereby the distal flow rate adjusting member 96 to the outer control cylinder member 62 is fitted. Installation is complete.
In addition, it is preferable that the vertical distance d3 in each positioning recess 108a ′ is the same, and is set smaller than the width of the finger of the installer.
That is, the vertical distance d3 in each positioning recess 108a ′ is preferably set to 13 mm or less, and more preferably set to 5 mm or less.

  In the present embodiment, the fitting between the outer control cylinder member 62 and the proximal flow rate adjustment member 94 of the drain valve device 28 and the fitting between the outer control cylinder member 62 and the distal flow rate adjustment member 96 are performed. As an example, each of the fitting portions 104, 104 ′, 108, 108 ′ of the outer control cylinder member 62 is a female fitting portion, and the fitting portions 102, 106 and the distal portion of the proximal flow rate adjusting member 94 are Although the embodiment in which each of the fitting portions 102 ′ and 106 ′ of the side flow rate adjusting member 94 is a male fitting portion has been described, the present invention is not limited to such a configuration, and the female fitting portion and the male fitting portion are not limited thereto. You may make it the form which swapped male and female.

  In the present embodiment, the male fitting portions 102 and 106 on both sides of the proximal flow rate adjustment member 94 and the fitting portions 102 ′ and 106 ′ on both sides of the distal flow rate adjustment member 94 are described. As an example, one male side fitting portion 102, 102 ′ is made to be a frame-like protrusion 102b, 102b ′, and the other male side fitting portion 106, 106 ′ is made to have a claw-like protrusion 106a, 106a ′. Although the embodiment provided with the projection of the form has been described, the present invention is not limited to such a form, and the fitting portions 102 ′ and 106 ′ on both sides of the proximal flow rate adjustment member 94 and the both sides of the distal flow rate adjustment member 94 are provided. The fitting portions 102 ′ and 106 ′ may be shaped like the same claw-like projection.

Next, the details of the switching valve 56 of the outer control cylinder member 62 of the drain valve device 28 will be described with reference to FIGS. 5, 17 and 18.
FIG. 17 (a) is a perspective view showing a state before the weight is attached to the switching valve of the drain valve device of the flush water tank device according to the first embodiment of the present invention, and FIG. FIG. 17C is a perspective view illustrating a state in which a weight is being attached to the switching valve of the drain valve device of the flush water tank device according to the first embodiment, and FIG. 17C is a diagram of the flush water tank device according to the first embodiment of the present invention. It is a perspective view which shows the state after the completion of attachment of the weight in the switching valve of a drain valve apparatus.
FIG. 18 is a front view showing the switching valve in the drain valve device of the flush water tank device according to the first embodiment of the present invention.

As shown in FIGS. 5, 12, 17, and 18, the switching valve 56 of the outer control cylinder member 62 is attached to the proximal side wall 90 b of the cylinder body 90 and can open and close the opening 90 c. A switching valve main body 56c made of steel, a thin plate-like stainless steel weight 56b extending in the horizontal direction, and a weight mounting portion 56d provided on the outer surface of the switching valve main body 56c to which the weight is detachably attached.
Further, the switching valve main body 56c is a pair of hinge portions 90h provided at the front lower end and the rear lower end of the proximal side wall 90b that forms the opening 90c of the cylindrical main body 90 of the outer control cylindrical member 62. A hinge portion 56e is rotatably attached to the head. When the hinge portion 56e of the switching valve body 56c rotates around the hinge portion 90h of the cylinder body 90, the switching valve body 56c stands up and closes the opening 90c of the cylinder body 90. From the predetermined upper position, it can be rotated to the outer side of the proximal side wall 90b of the cylindrical main body 90 to a predetermined lower position where the opening 90c of the cylindrical main body 90 is opened.

Furthermore, the weight attaching portion 56d is provided in front of the upper support portion 56f and the lower support portion 56g for supporting the upper end and the lower end of the weight 56b, respectively, and fixes the weight 56b in the front-rear direction. A snap fit 110 that is an elastic fastener.
When the weight 56b is attached to the weight mounting portion 56d, the snap fit 110 is inserted by inserting the weight 56b between the switching valve main body 56c and the snap fit 110 from above (see FIG. 17A). A part of 56b is sandwiched between the switching valve main body 56c and the snap fit 110 (see FIG. 17B). Further, in a state where a part of the weight 56b is sandwiched between the switching valve main body 56c and the snap fit 110, the weight 56b can pass between the switching valve main body 56c and the snap fit 110 in the front-rear direction and this passage. It functions as elastic contact means that elastically contacts the intermediate weight 56b.

Further, the snap fit 110 has a base end portion 110a projecting a predetermined length outward from a portion near the lower end of the outer surface of the switching valve main body 56c, and a predetermined distance from the base end portion 110a to the outer surface of the switching valve main body 56c. A tip portion 110b extending upward is provided.
Further, the snap fit 110 includes an elastic deformation part 110c extending from the base end part 110a to the front end part 110b. The elastic deformation part 110c is configured to attach the weight 56b to the weight attachment part 56d and the base end part 110a and the front end part. 110b is a fixed end and a free end, respectively, and an elastic bending deformation of the outer surface of the switching valve main body 56c in the out-of-plane direction is possible. By this bending deformation, the weight 56b and the switching valve main body 56c and the snap fit 110 are made. It is possible to pass between and in the front-rear direction.

In addition, the elastic deformation portion 110c includes a protrusion 110d that protrudes from the distal end portion 110b toward the outer surface of the switching valve main body 56c. When the weight 56b is attached to the weight attaching portion, the weight 56b passes through the switching valve main body 56c and the snap fit 110 in the front-rear direction, and the elastic deformation portion 110c causes the outer surface of the switching valve main body 56c to be out-of-plane. The outer surface 56h of the weight 56b and the protrusion 110d are movable in the front-rear direction while being in elastic contact with each other in a state where the elastic bending deformation is performed.
In FIG. 18, while the weight 56b passes between the switching valve main body 56c and the snap fit 110, the elastic deformation portion 110c causes elastic bending deformation of the outer surface of the switching valve main body 56c in the out-of-plane direction. The snap fit 110 in a broken state is indicated by a virtual line A.

Further, as shown in FIGS. 17 (c) and 18, the entire weight 56b is completely inserted between the upper support portion 56f and the lower support portion 56g, and the outer surface 56h of the weight 56b and the elasticity of the protrusion 110d. The general contact is released, and the attachment of the weight 56b to the weight attaching portion 56d is completed.
When the weight 56b is completely attached to the weight mounting portion 56d, the elastic bending deformation by the elastic deformation portion 110c described above returns, and the front end surface 56i of the weight 56b and the rear side of the elastic deformation portion 110c of the snap fit 110 ( The end surfaces 110 e on the weight side) are in contact with each other, and the weight 56 b is fixed in the front-rear direction by the snap fit 110.

Next, with reference to FIGS. 5 to 20, the operation (action) of the drain valve device according to the first embodiment of the present invention and the washing water tank device including the same will be described.
Here, FIG. 19A is a front sectional view showing the drain valve device in a state before the start of drainage in the large washing mode of the flush water tank device according to the first embodiment of the present invention, and FIG. Fig. 19 is a front sectional view showing the drain valve device in a state immediately after the start of drainage in the large washing mode of the flush water tank device according to the first embodiment of the present invention, and Fig. 19 (c) is according to the first embodiment of the present invention. It is front sectional drawing which shows the drain valve apparatus of the state in the middle of draining in the large washing mode of a washing water tank apparatus, FIG.19 (d) is the waste_water | drain in the large washing mode of the washing water tank apparatus by 1st Embodiment of this invention. It is front sectional drawing which shows the drain valve apparatus of the state after completion | finish.
Moreover, Fig.20 (a) is front sectional drawing which shows the drain valve apparatus of the state before the drainage start in the small washing mode of the washing water tank apparatus by 1st Embodiment of this invention, FIG.20 (b), FIG. 20C is a front sectional view showing the drain valve device in a state immediately after the start of drainage in the small washing mode of the washing water tank apparatus according to the first embodiment of the present invention, and FIG. 20C is a cleaning according to the first embodiment of the present invention. It is front sectional drawing which shows the drain valve apparatus in the middle of draining in the small washing mode of a water tank apparatus, FIG.20 (d) is the completion | finish of draining in the small washing mode of the washing water tank apparatus by 1st Embodiment of this invention. It is front sectional drawing which shows the drain valve apparatus of a back state.

Here, in FIG.19 and FIG.20, the flow of the washing water is schematically shown by arrows.
Further, in each of the large cleaning mode and the small cleaning mode described below, the flow rate adjusting member 92 attached to the inner control cylinder member 76 is also shown in FIG. The 92 shielding portions 92a shield the upper opening region from a height position substantially half of the opening 76a of the inner control cylinder member 76.
Further, in each of the large washing mode and the small washing mode described below, the proximal flow rate adjusting member 94 and the distal flow rate adjusting member 96 attached to the outer control cylindrical member 62 are cylindrical. The tube 90 is attached to the lowermost attachment position with respect to the main body 90, and the proximal opening 90d and the distal opening 90d ′ for adjusting the flow rate of the cylindrical body 90 corresponding to each of them are almost entirely open. It is in an open state. That is, since the upper edge of the distal flow rate adjustment member 96 is located below the upper edge of the proximal flow rate adjustment member 94, the distal opening 90 d opened by the distal flow rate adjustment member 96. The lower edge of the opening region of 'is below the lower edge of the opening region of the proximal opening 90d opened by the proximal flow rate adjusting member 94 and above the upper edge of the cleaning mode switching opening 90c. Is located.

First, with reference to FIGS. 19A to 19D, the large cleaning mode of the two types of cleaning modes executed by the cleaning water tank apparatus according to the first embodiment of the present invention will be described.
In the drain valve device 28 in a state before the drainage in the large washing mode as shown in FIG. 19A is started, both the first ball chain 48 and the second ball chain 50 are substantially linear in the vertical direction. It is in the state extended to. At this time, with respect to the switching valve 56, the third ball chain 54 is loosened due to the dead weight of the switching valve 56 itself including the weight 56b, and the cleaning mode switching opening of the cylinder body 90 of the outer control cylinder member 62 is obtained. The part 90c is open.
Further, the water level in the water storage tank 22 is the water stop water level WL0 when the water is full, and is located above the upper end of the inner control cylinder member 76 and below the inlet 86a of the overflow pipe 40. The inside of the cylindrical body 90 and the inside of the water storage portion 76b of the inner control cylinder member 76 are filled with cleaning water.

  Next, as shown in FIG. 19B, in the drain valve device 28 in a state immediately after the drainage in the large washing mode is started, the user moves the operation lever 42 (see FIGS. 2 to 4) to the near side. When rotating to a (predetermined side) by a predetermined angle (for example, 90 degrees), the ball chain pulling member 46 rotates together with the rotation shaft 44, and the first ball chain 48 is stretched substantially linearly in the vertical direction. The second ball chain 50 is in a relaxed state. Further, the third ball chain 54 is also loosened, and the switching valve 56 is in a state in which the opening 90c of the cylindrical body 90 is opened.

At this time, the position of the first ball chain attaching portion 46a of the ball chain pulling member 46 is raised from the state before the start of drainage shown in FIG. 19A, so that only the first ball chain 48 is the ball chain pulling member 46. When the float member 52 is lifted by the first ball chain attachment portion 46a, the float pipe 52 and the valve body 84 rise integrally.
Further, the valve body 84 is in contact with the bottom of the inner control cylinder member 76 and is located at the highest height position that is higher than the upper end of the opening 90c of the cylinder body 90 of the outer control cylinder member 62, and is lifted up. Is completed, and the drain valve 22a is opened and drainage is started with the switching valve 56 still opening the opening 90c of the cylindrical body 90.

The flush water in the region outside the cylinder body 90 of the outer control cylinder member 62 in the water storage tank 22 is opened by the switching valve 56, the proximal flow rate adjustment member 94, and the distal flow rate adjustment member 96. The cylinder main body 90 openings 90c, 90d, 90d 'and the cylinder main body 90 flow into the cylinder main body 90 from above, and the cleaning water in the water storage section 76b of the inner control cylinder member 76 is discharged from the opening 76a into the cylinder. It flows into the body main body 90. Then, the washing water in the cylinder body 90 passes through the communication port 82 of the drain port unit 60 and is discharged from the drain port 22a to the water conduit 6 of the toilet body 2, and the water level WL1 in the water storage tank 22 is shown in FIG. As shown to (b), it falls from the water stop level WL0 at the time of a full water by drainage, for example, is located above the upper end of the cylinder main body 90, and below the upper end of the inner side control cylinder member 76.
However, the flow velocity flowing into the drainage port 22a from the outer region of the cylindrical body 90 through the communication port 82 is higher than the flow velocity flowing into the cylindrical body 90 from the water storage portion 76b of the inner control cylinder member 76 through the opening 76a. Since the speed is high, the water level WL1 ′ in the water storage section 76b of the inner control cylinder member 76 is higher than the water level WL1 in the water storage tank 22 and lower than the water stop water level WL0.

Next, as shown in FIG. 19C, in the drain valve device 28 in the middle of drainage in the large washing mode, the operation is performed immediately after the first ball chain 48, the float member 52, and the valve body 84 are lifted up. Since the lever 42 is returned to the initial position, the float member 52 is floated by the buoyancy provided by the washing water in the water storage portion 76b of the inner control cylinder member 76, and the first ball chain 48 and the first ball chain 48 The two ball chain 50 is in a loose state.
Then, the water level in the water storage tank 22 decreases with time from the water level WL1 shown in FIG. 19B, and the upper edge of the distal flow rate adjusting member 96 attached to the cylinder body 90 (the distance from the cylinder body 90). Even after reaching the lower opening 90d ′, the inside of the water storage tank 22 and the inside of the cylindrical body 90 are communicated with each other through the opening 90c. For this reason, when the water level in the water storage tank 22 and the water level in the cylinder body 90 are lowered at the same water level WL2, and the water level WL2 is lowered with time from the upper end of the opening 76a of the water storage part 76b of the inner control cylinder member 76. The water level WL2 ′ in the water storage section 76b of the inner control cylinder member 76 starts to decrease at a predetermined speed corresponding to the flow rate of the cleaning water in the water storage section 76b flowing out from the opening 76a of the water storage section 76b of the inner control cylinder member 76. .

Further, as the water level WL2 ′ in the water storage portion 76b of the inner control cylinder member 76 shown in FIG. 19C is lowered, the float member 52 is also lowered, and the overflow pipe 40 and the valve are interlocked with the lowering of the float member 52. The body 84 also descends at the same speed as the descending speed of the float member 52.
Incidentally, the opening cross-sectional area of the opening 76a of the inner control cylinder member 76 increases as the mounting position for attaching the claw-like projection 100a of the flow rate adjustment member 92 to the positioning recess 98a of the inner control cylinder member 76 increases. During the drain operation of the valve device 28, the flow rate of the wash water in the water storage portion 76b of the inner control cylinder member 76 flowing out from the opening 76a increases, so that the float portion 52c and the valve body 84 during the drainage descend faster. Accordingly, the time during which the valve body 84 opens the drain port 22a (valve opening time) is shortened, and the amount of washing water supplied from the washing water tank device 18 to the toilet body 2 is reduced.

Next, as shown in FIG. 19 (d), in the drain valve device 28 at the end of drainage in the large washing mode, the water level WL2 ′ in the water reservoir 76b of the inner control cylinder member 76 shown in FIG. When the water level that does not give buoyancy to the float member 52 (that is, WL2 ′ is almost zero) and the bottom 52d of the float 52c reaches the bottom of the water reservoir 76b, the valve body 84 closes the drain 22a. The drainage ends.
At this time, the water level in the water storage tank 22 and the cylindrical body 90 is a dead water level DWL lower than the water level WL2 shown in FIG.

Next, the small cleaning mode executed by the cleaning water tank apparatus according to the first embodiment of the present invention will be described with reference to FIGS.
First, in the drain valve device 28 in a state before the drainage in the small washing mode as shown in FIG. 20A is started, the case of the large washing mode shown in FIG. Since it is the same, description is abbreviate | omitted.

  Next, as shown in FIG. 20B, in the drain valve device 28 in a state immediately after the drainage in the small cleaning mode is started, the user moves the operation lever 42 to the back side (back side) at a predetermined angle ( For example, when rotated 90 degrees, the ball chain pulling member 46 rotates with the rotation shaft 44, the ball chain pulling member 46 rotates with the rotation shaft 44, and the second ball chain 50 and the third ball chain 54 move up and down. The first ball chain 48 is in a slack state in a state of being stretched substantially linearly in the direction.

Further, as shown in FIG. 20 (b), the position of the second ball chain mounting portion 46b of the ball chain pulling member 46 rises from the state before the start of drainage shown in FIG. When the chain 50 is pulled up by the second ball chain mounting portion 46b of the ball chain pulling member 46, the float member 52 rises, and as the float member 52 rises, the overflow pipe 40 and the valve body 84 rise integrally. .
At the same time, the third ball chain 54 is also pulled up by the third ball chain mounting portion 46 c of the ball chain lifting member 46, and the third ball chain mounting portion 56 b of the switching valve 56 is also lifted upward to open the cylinder body 90. The part 90 c is closed by the switching valve 56.

  At this time, the valve body 84 is in contact with the bottom of the inner control cylinder member 76 and is located at the highest height position that is higher than the upper end of the opening 90c of the cylinder body 90, and the state where the lifting is completed is In the state where the switching valve 56 closes the opening 90c of the cylindrical body 90, the drain port 22a is opened and drainage is started.

  Further, as shown in FIG. 20B, after the drainage is started, the cleaning water inside the cylindrical body 90 is discharged from the drain port 22a before the cleaning water outside the cylindrical body 90. The flow rate of the cleaning water flowing inside the main body 90 is relatively larger than the flow rate of the cleaning water flowing outside the cylindrical body 90, the water pressure outside the switching valve 56 becomes higher than the water pressure inside, and the switching valve 56 A water pressure differential occurs inside and outside. Then, due to this differential pressure, a force F in a direction to close the opening 90c of the cylindrical body 90 is applied to the switching valve 56, so that the switching valve 56 is held in the closed state.

Further, as shown in FIG. 20B, the wash water in the region outside the cylindrical body 90 in the water storage tank 22 is released by the proximal flow rate adjusting member 94 and the distal flow rate adjusting member 96, respectively. The cylinder body 90 flows into the cylinder body 90 from above the openings 90d and 90d ′ and the cylinder body 90, but does not flow into the cylinder body 90 from the opening 90c closed by the switching valve 56. Absent.
Therefore, the wash water in the cylinder body 90 passes through the communication port 82 of the drain port unit 60, is discharged from the drain port 22a to the water conduit 6 of the toilet body 2, and is shown in FIG. The water level WL3 shown is lower than the water stop level WL0 when the water is full due to drainage, and finally, as shown in FIGS. 20 (c) and 20 (d), the upper edge of the distal flow rate adjusting member 96 It will remain at the water levels WL4 and WL5 which are equal to the height position of (the lower edge of the distal opening 90d ′ of the cylindrical body 90).

  Further, the cleaning water in the water reservoir 76b of the inner control cylinder member 76 flows into the cylinder body 90 from the opening 76a. The flow velocity flowing from the region outside the cylindrical body 90 into the drainage port 22a through the communication port 82 is faster than the flow velocity flowing into the cylindrical body 90 from the water storage portion 76b of the inner control cylinder member 76 through the opening 76a. As shown in FIG. 20B, the water level WL3 ′ in the water storage section 76b of the inner control cylinder member 76 is higher than the water level WL3 in the water storage tank 22 and lower than the water stop water level WL0.

Next, as shown in FIG. 20 (c), in the drain valve device 28 in the middle of draining in the small cleaning mode, the second ball chain 50, the third ball chain 54, and the float member shown in FIG. 20 (b). Since the operation lever 42 is returned to the initial position immediately after the lifting of the valve body 84 and the valve body 84 is completed, the float member 52 is floated by the buoyancy provided by the washing water in the water storage portion 76b of the inner control cylinder member 76. In this state, the first ball chain 48, the second ball chain 50, and the third ball chain 54 are loosened.
However, even when the third ball chain 54 is slack, the force F in the direction of closing the opening 90c of the cylindrical body 90 is applied to the switching valve 56 by the differential pressure of the water pressure inside and outside the switching valve 56 described above. Therefore, the switching valve 56 is kept closed.

Further, as shown in FIG. 20C, the water level WL4 in the water storage tank 22 decreases with time from the water level WL3 shown in FIG. 90. When the water drops to the vicinity of the lower edge 90) of the distal opening 90d ′ of 90, the cleaning water in the cylindrical body 90 is suddenly discharged from the drain port 22a via the communication port 82.
At this time, when the water level WL4 ″ in the cylinder body 90 decreases with time from the upper end of the opening 76a of the water storage part 76b of the inner control cylinder member 76, the water storage flowing out from the opening 76a of the water storage part 76b of the inner control cylinder member 76 The water level WL4 ′ in the water storage section 76b of the inner control cylinder member 76 starts to decrease at a predetermined speed corresponding to the flow rate of the cleaning water in the section 76b.

Further, as the water level WL4 ′ in the water storage portion 76b of the inner control cylinder member 76 shown in FIG. 20 (c) decreases, the float member 52 also descends, and the overflow pipe 40 and the valve are interlocked with the descending of the float member 52. The body 84 also descends at the same speed as the descending speed of the float member 52.
Furthermore, as in FIG. 20B, the force F in the direction of closing the opening 90c of the cylindrical body 90 is applied to the switching valve 56 by the differential pressure of the water pressure inside and outside the switching valve 56. The switching valve 56 is kept closed.

Next, as shown in FIG. 20 (d), in the drain valve device 28 at the end of drainage in the small cleaning mode, the water level WL 5 ′ in the water reservoir 76 b of the inner control cylinder member 76 gives buoyancy to the float member 52. When the water level drops to a low water level (ie, WL5 ′ is substantially zero) and the bottom 52d of the float 52c reaches the bottom of the water storage 76b, the valve body 84 closes the drain 22a, and drainage ends.
At this time, the water level WL5 in the water storage tank 22 is the same as the water level WL4 shown in FIG. 20 (c), and is substantially the dead water level DWL ′ in the water storage tank 22.
On the other hand, the water level WL5 ″ in the cylinder body 90 is lower than WL4 ″ shown in FIG. 20C, and becomes a substantial dead water level DWL ″ in the cylinder body 90.
Similarly to FIGS. 20B and 20C, a state in which a force F in the direction of closing the opening 90 c of the cylindrical body 90 is applied to the switching valve 56 due to the differential pressure of the water pressure inside and outside the switching valve 56. Therefore, the switching valve 56 is kept closed.

Thus, in the small cleaning mode, after the drainage is started, the switching valve 56 is held in a state in which the opening 90c of the cylindrical body 90 is closed, so the flow rate of the cleaning water discharged from the drain port 22a is large cleaning. Compared to the case of the mode, the cleaning water in the water storage tank 22 passes through the opening 90c from the outside of the cylindrical body 90 and decreases by the flow rate of the cleaning water discharged from the drain port 22a.
Incidentally, in this embodiment, although the case where each attachment position of the proximal side flow rate adjustment member 94 with respect to the outer side control cylinder member 62 and the distal side flow rate adjustment member 96 is set to the lowest position is demonstrated, outer control is demonstrated. The proximal flow rate adjusting member 94 and the distal flow rate adjusting member 96 are opened by the proximal flow rate adjusting member 94 and the distal flow rate adjusting member 96, respectively, as the attachment positions of the proximal flow rate adjusting member 94 and the distal flow rate adjusting member 96 to the cylindrical member 62 are set upward. The opening areas of the openings 90d and 90d ′ are reduced, and the washing water in the water storage tank 22 is discharged from the openings 90d and 90d ′ of the cylinder body 90 to the inside of the cylinder body 90 when the drain valve device 28 is drained. Therefore, the amount of washing water in the small washing mode supplied from the drain port 22a of the washing water tank 22 to the toilet body 2 is reduced.

According to the drain valve device 28 and the flush water tank device 18 including the drain valve device 28 according to the first embodiment of the present invention described above, the inner control cylinder member 76 of the male side fitting portion 100 of the flow rate adjusting member 92 is fitted. The vertical distance d1 in the concave portion of the positioning concave portion 98a in the female side fitting portion 98 is set to be smaller than the width of the finger of the installer. In addition, the vertical distance d2 in the concave portion of the positioning concave portion 104a in the female side fitting portion 104 of the outer control cylinder member 62 into which the male side fitting portion 102 of the proximal flow rate adjusting member 94 is fitted and the distal direction The vertical distance d2 in the concave portion of the positioning concave portion 104a ′ in the female side fitting portion 104 ′ of the outer control cylinder member 62 into which the male side fitting portion 102 ′ of the side flow rate adjusting member 96 is fitted is also applied. It is set smaller than the width of the person's finger. Further, the distance d3 in the vertical direction in the concave portion of the positioning concave portion 108a in the female side fitting portion 108 of the outer control cylinder member 62 into which the male side fitting portion 106 of the proximal flow rate adjusting member 94 is fitted and the distal side. The vertical distance d3 in the concave portion of the positioning concave portion 108a ′ in the female side fitting portion 108 ′ of the outer control cylinder member 62 into which the male side fitting portion 106 ′ of the side flow rate adjusting member 96 is fitted is also applied. It is set smaller than the width of the person's finger. As a result, the operator causes the fingers to enter the positioning recesses 98a, 104a, 104a ′, 108a, and 108a ′ on the site, so that the male fitting portion 100 of the flow rate adjusting member 92 and the inner control cylinder member 76 Release operation of fitting with the female fitting portion 98, and release of fitting between the male fitting portions 102, 106 of the proximal flow rate adjusting member 94 and the female fitting portions 104, 108 of the outer control cylinder member 62. Easy to operate and to release the fitting between the male fitting portions 102 ′ and 106 ′ of the distal flow rate adjusting member 96 and the female fitting portions 104 ′ and 108 ′ of the outer control cylinder member 62. Can be prevented.
That is, the male side fitting portion 100 of the proximal flow rate adjusting member 94 is in a state where the male side fitting portion 100 of the flow rate adjusting member 92 is fitted to the female side fitting portion 98 of the inner control cylinder member 76. A state in which each is fitted to each of the female-side fitting portions 104 and 108 of the outer control cylinder member 62, and each of the male-side fitting portions 102 ′ and 106 ′ of the distal-side flow rate adjusting member 96 is controlled outside. In the state of being fitted to the female side fitting portions 104 ′ and 108 ′ of the cylindrical member 62, it is easy for the installer to fit these unless tools such as tools having a width smaller than the width of the fingers are used. Therefore, it is possible to prevent the flow rate adjusting member 92 from being easily removed from the inner control cylinder member 76, and the proximal flow rate adjustment member 94 and the distal flow rate adjustment member 96 to the outer control cylinder member. To be easily removable from 62. Can be prevented.
As a result, the construction position of the flow rate adjusting member 92 with respect to the inner control cylinder member 76 cannot be easily changed by mistake during construction of the washing water tank device 18 and the drain valve device 28, and the outer control cylinder member. Since the attachment positions of the proximal flow rate adjusting member 94 and the distal flow rate adjusting member 96 with respect to 62 cannot be easily changed, the builder can easily supply the amount of cleaning water supplied from the water storage tank 22 to the toilet body 2 on site. It is possible to prevent the adjustment, and it is possible to supply an appropriate amount of washing water set in advance to the toilet body 2.

Furthermore, according to the drain valve device 28 and the flush water tank device 18 having the same according to the present embodiment, when the proximal flow rate adjusting member 94 and the distal flow rate adjusting member 96 are fitted to the outer control cylinder member 62. In addition, the frame-like protrusions 102 b and 102 b ′ of the male fitting portions 102 and 102 ′ of the proximal flow rate adjusting member 94 and the distal flow rate adjusting member 96 are connected to the female fitting portion 104 of the outer control cylinder member 62. 104 ′, the claw-like projections of the male fitting portions 106, 106 ′ of the proximal flow rate adjusting member 94 and the distal flow rate adjusting member 96 in a state of being fitted in the positioning recesses 104a, 104a ′. 106a and 106a ′ can be easily fitted into the positioning concave portions 108a and 108a ′ of the female side fitting portions 108 and 108 ′ of the outer control cylinder member 62. Therefore, each of the proximal flow adjustment member 94 and the distal flow adjustment member 96 can be easily attached to the outer control cylinder member 62, and the proximal flow adjustment member 94 and the distal flow adjustment member 96 and the outside can be easily attached. Assemblability with the control cylinder member 62 can be improved.
Further, once the male fitting portions 102, 102 ′, 106, 106 ′ of the proximal flow rate adjusting member 94 and the distal flow rate adjusting member 96 are replaced with the female fitting portions 104, Once fitted into 104 ', 108, 108', the construction flow rate adjusting member 94 and the distal flow rate adjusting member 94 will be used unless the installer uses a tool such as a tool having a width smaller than the width of the finger. It is possible to easily release the fitting between the 96 male side fitting portions 102, 102 ′, 106, 106 ′ and the female side fitting portions 104, 104 ′, 108, 108 ′ of the outer control cylinder member 62. This prevents the proximal flow rate adjusting member 94 and the distal flow rate adjusting member 96 from being easily removed from the outer control cylinder member 62. As a result, at the time of construction of the washing water tank device 18 and the drain valve device 28, the installer easily changes the attachment positions of the proximal flow rate adjusting member 94 and the distal flow rate adjusting member 96 with respect to the outer control cylinder member 62. Therefore, it is possible to prevent the builder from easily adjusting the amount of washing water supplied from the water storage tank 22 to the toilet body 2 at the site, and to supply an appropriate amount of washing water set in advance to the toilet body 2. be able to.

  Further, according to the drain valve device 28 and the flush water tank device 18 including the drain valve device 28 according to the present embodiment, the female side fitting portions 98 of the inner control cylinder member 76 are walls on both sides of the opening 76 a of the inner control cylinder member 76. The female side fitting portions 104 and 108 of the outer control cylinder member 62 are provided integrally with the proximal side wall 90b of the cylindrical body 90, and the female side fitting portion of the outer control cylinder member 62 is provided integrally with the portion 76e. Since 104 ′ and 108 ′ are integrally provided on the proximal side wall 90 b ′ of the cylindrical body 90, the fitting between the flow rate adjusting member 92 and the inner control cylindrical member 76 and the proximal flow rate adjusting member 94 are provided. And means for preventing the fitting between the distal flow rate adjusting member 96 and the outer control cylinder member 62 from being easily released is provided on the female side fitting portions 104, 104 ′, 108, 108 ′ of the outer control cylinder member 62. Positioning recesses 104a, 104a ', 108 , 108a ′, the flow rate adjusting members 92, 94 for the inner control cylinder member 76 and the outer control cylinder member 62 are mistakenly applied by the installer when constructing the cleaning water tank device 18 and the drain valve device 28. , 96 can be easily changed with a simple structure. As a result, an appropriate amount of washing water set in advance can be supplied to the toilet body 2.

Furthermore, according to the drain valve device 28 and the washing water tank device 18 having the same according to the present embodiment, when the weight 56b is attached to the weight attachment portion 56d of the changeover valve 56 of the outer control cylinder member 62, the switching valve body 56c. By inserting a weight 56b from above into the snap fit 110 from above, a part of the weight 56b is sandwiched between the switching valve body 56c and the snap fit 110, and the elastic deformation portion 110c of the snap fit 110 is elastically deformed. When the weight 56b is moved backward while elastically contacting the weight 56b and the protrusion 110d of the snap fit 110, the elastic contact is released, and the weight 56b is released from the switching valve main body 56c and the support portions 56f, 56g. The weight 56b is inserted into the weight mounting portion 5 by the support portions 56f and 56g and the rear end surface 110e of the snap fit 110. It can be reliably fixed to d.
When the weight 56b is attached to the weight mounting portion 56d of the switching valve 56 of the outer control cylinder member 62, the switching valve main body 56c causes the opening 90c of the outer control cylinder member 62 to be opened by the load in the vertical direction by the weight 56b. It can be rotated between a predetermined upper position closed and a predetermined lower position where the opening 90c of the outer control cylinder member 62 is opened. At this time, the vertical mounting load by the weight 56b acts on the support portions 56f and 56g of the weight mounting portion 56d of the switching valve 56, whereas the weight mounting portion of the switching valve 56 that fixes the front end surface 56i of the weight 56b. Since the vertical load caused by the weight 56b does not act on the 56d snap fit 110, the snap fit 110 (for example, the base end portion 110a of the snap fit 110) having relatively low strength against the vertical load is provided. It is possible to prevent damage due to the load of the weight 56b. Therefore, during the opening / closing operation of the opening 90c of the outer control cylinder member 62 by the switching valve 56 of the outer control cylinder member 62, the snap fit 110 of the weight mounting portion 56d of the switching valve 56 is damaged, and the weight 56b becomes the weight mounting portion 56d. Can be prevented from falling off. As a result, malfunction of the switching valve 56 can be prevented, and the reliability of the drain valve device 28 can be improved.

Next, with reference to FIGS. 21 and 22, a drain valve device according to a second embodiment of the present invention and a flush water tank device including the drain valve device will be described.
Here, Fig.21 (a) is a side view which shows the state before attachment of the weight in the switching valve of the drain valve apparatus of the washing water tank apparatus by 2nd Embodiment of this invention, FIG.21 (b) FIG. 21C is a side view showing a state in which a weight is being attached to the switching valve of the drain valve device of the flush water tank device according to the second embodiment of the present invention, and FIG. 21C is the flush water according to the first embodiment of the present invention. It is a side view which shows the state after the completion of attachment of the weight in the switching valve of the drain valve apparatus of a tank apparatus.
FIG. 22 is a front view showing the switching valve in the drain valve device of the flush water tank device according to the second embodiment of the present invention.
21 and 22, the same parts as those of the drain valve device according to the first embodiment of the present invention described above are denoted by the same reference numerals, and the description thereof is omitted.

As shown in FIGS. 21 and 22, in the drain valve device according to the second embodiment of the present invention, only the configuration of the switching valve 200 is the switching valve 56 of the drain valve device 28 according to the first embodiment of the present invention described above. The configuration is different.
In other words, the switching valve 200 includes protrusions 202 that are integrally formed in a substantially hemispherical shape on the outer surface 56h of the switching valve main body 56c and that are disposed in front of the upper support portion 56f and the lower support portion 56g that support the weight 56b. I have.
When the weight 56b is attached to the weight attachment portion 200a, the weight 56b is brought into contact with the surface of the projection 202 from above (see FIG. 21A), so that a part of the rear of the weight 56b becomes the lower support portion 56g. (See FIG. 21B). At this time, the weight 56b can pass in the front-rear direction while contacting the surface of the protrusion 202.

Further, as shown in FIGS. 21 (b) and 22, the weight 56b when passing in the front-rear direction while contacting the surface of the protrusion 202 protrudes out of the plane from the outer surface 56h of the switching valve body 56c. Due to the height h1 of the protrusion 202, an elastic bending deformation temporarily occurs in a direction away from the outer surface 56h of the switching valve main body 56c.
In FIG. 22, an elastic bending deformation occurs in a direction away from the outer surface 56h of the switching valve main body 56c while the inner surface 56j of the weight 56b is in contact with the surface of the projection 202 in the front-rear direction. The weight 56b in the state of being present is indicated by a virtual line B.

Further, as shown in FIG. 21 (c), when the entire weight 56b is completely inserted between the upper support portion 56f and the lower support portion 56g, the inner surface 56h of the weight 56b, the protrusion 202, and the elastic Therefore, the attachment of the weight 56b to the weight attaching portion 56d is completed.
When the attachment of the weight 56b to the weight attaching portion 56d is completed, the elastic bending deformation of the weight 56b by the protrusion 202 returns, the front end surface 56i of the weight 56b and the outer edge 202a of the protrusion 202 abut each other, and the weight 56b The projection 202 is fixed in the front-rear direction.

According to the drain valve device according to the second embodiment of the present invention described above, when attaching the weight 56b before attachment shown in FIG. 21 (a) to the weight attachment portion 200a of the switching valve 200 of the outer control cylinder member 62, FIG. As shown in FIG. 21 (b), after a part of the weight 56b is brought into contact with the protrusion 202 and a part of the lower support part 56g from above, the weight 56b is elastically brought into contact with the surface of the protrusion 202 and moved backward. Move. At this time, as shown by the phantom line B in FIG. 22, the weight 56b passes through the protrusion 202 in a state where elastic bending deformation occurs in a direction away from the outer surface 56h of the switching valve main body 56c. Thereafter, when the entire weight 56b is completely inserted between the upper support portion 56f and the lower support portion 56g, the elastic contact between the weight 56b and the protrusion 202 is released, and the weight 56b is switched to the switching valve body 56c. The weight 56b can be securely fixed to the weight mounting portion 200a by the support portions 56f and 56g and the outer edge 202a of the protrusion 202.
When the weight 56b is attached to the weight mounting portion 200a of the switching valve 56 of the outer control cylinder member 62, the switching valve main body 56c causes the opening 90c of the outer control cylinder member 62 to be opened by the vertical load caused by the weight 56b. When rotating between a closed predetermined upper position and a predetermined lower position where the opening 90c of the outer control cylinder member 62 is opened, weights are provided on the support portions 56f and 56g of the weight mounting portion 200a of the switching valve 56. A vertical load due to the weight 56b does not act on the outer edge 202a of the protrusion 202 of the weight mounting portion 200a of the switching valve 56 that fixes the front end surface 56i of the weight 56b, whereas a vertical load due to the weight 56b acts. The protrusion 202 can be prevented from being damaged by the load of the weight 56b. Therefore, during the opening / closing operation of the opening 90c of the outer control cylinder member 62 by the switching valve 56 of the outer control cylinder member 62, the protrusion 202 of the weight mounting portion 200a of the switching valve 56 is damaged and the weight 56b is removed from the weight mounting portion 200a. It can be prevented from falling out. As a result, malfunction of the switching valve 56 can be prevented, and the reliability of the drain valve device 28 can be improved.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet bowl main body 4 Bowl part 6 Water conduit 8 Trap pipe line 8a Inlet 8b Ascending path 8c Descent path 10 Rim 12 First outlet 14 Reservoir 16 Second outlet 18 Washing water tank device 20 Exterior tank 22 Reservoir Tank 22a Drain port 24 Lid 26 Water supply device 28 Drain valve device 30 Water supply pipe 32 Water supply valve 34 Float 36 Water discharge port 38 Refill pipe 40 Overflow pipe 40a Valve body holding part 40b Cylindrical part 40c Curved surface 42 Operation lever 44 Rotating shaft 44a Rotation Center axis of shaft 46 Ball chain pulling member 46a First ball chain mounting portion 46b Second ball chain mounting portion 46c Third ball chain mounting portion 48 First ball chain 50 Second ball chain 52 Float member 52a First ball chain mounting portion 52b 2nd ball chain attaching part 52c Float part 52d Bottom part 52e Overflow pipe attaching part 52 Center hole of the float part 54 Third ball chain 56 Switching valve 56a Third ball chain mounting part 56b Weight 56c Switching valve body 56d Weight mounting part 56e Switching valve body hinge 56f Upper support part 56g Lower support part 56h Outside of the weight Surface 56i Front end surface of weight 56j Inner surface of weight 58 Drain valve unit 58a Center axis of drain valve unit 60 Drain port unit 62 Outer control cylinder member 64 Drain port forming member 64a Flow path surface 66 Seal member 68 Fastening member 70 Drain port forming member The upper edge portion of the drain port 72 The holding projection 74 The upper end opening portion 76 of the drain port forming member 76 The inner control cylinder member 76a The opening 76b The water storage portion 76c The guide portion 76d The engaging groove 76e The wall portion 78 The holding projection 80 The rib 82 of the drain port forming member 84 Valve body 86 Overflow pipe mounting member 86a Inlet port 88 Refill pipe mounting member 8a Nozzle part 90 Cylindrical body 90a Engaging groove 90b Proximal side wall 90b 'Distal side wall 90c Cleaning mode switching opening 90d Proximal opening for flow adjustment 90d' Distal opening for flow adjustment 90e Back side wall 90f Back side wall 90g Concave 90h Hinge 92 Flow rate adjusting member 92a Flow rate adjusting member shielding part 94 Proximal flow rate adjusting member 94a Shielding part 96 Distal flow rate adjusting member 96a Shielding part 98 Inner control cylinder Female side fitting portion 98a Positioning recess 100 Flow rate adjusting member male side fitting portion 100a Claw-like projection 102 Proximal side flow rate adjusting member male side fitting portion 102a Long hole 102b Frame-like projection 102 ′ Distal side Male side fitting portion 102a 'of the flow rate adjusting member 102a' long hole 102b 'frame-like projection 102c' upper end portion 102d 'of frame-like projection lower end portion 1 of frame-like projection 02e 'Pillar 104 Female-side fitting portion 104a of outer control cylinder member Positioning recess 104b Depression-forming projection 104' Female-side fitting portion 104a 'of outer control cylinder member Positioning recess 106 Male side of proximal flow rate adjusting member Fitting portion 106a Claw-like projection 106 'Male fitting portion 106a' of distal flow rate adjusting member Claw-like projection 106b 'Claw-like projection tip portion 108 Female-side fitting portion 108a of outer control cylinder member Positioning recess 108 'Female-side fitting portion 108a of outer control cylinder member' Positioning recess 108b 'Recess 110 in positioning recess Snap fit (fixing portion, elastic contact means, elastic fastener)
110a Snap-fit base end portion 110b Snap-fit tip portion 110c Snap-fit elastic deformation portion 110d Snap-fit projection portion 110e Snap-fit rear end surface 200 Switching valve 200a Weight attachment portion 202 Protrusion 202a Outer edge of the projection

Claims (4)

A drain valve device for a washing water tank for storing washing water for washing a toilet,
A drain valve that opens and closes a drain outlet disposed on the bottom surface of the washing water tank;
An inner control cylinder member for controlling the vertical movement of the drain valve;
An outer control cylinder member provided to surround the drain port, the drain valve, and the inner control cylinder member, and extending upward from the bottom surface of the washing water tank and opening the upper side thereof; A switching valve attached to the opening formed in the side wall so as to be openable and closable, and the opening and closing of the opening by the switching valve allows the flow rate of the washing water flowing out from the drain of the washing water tank. The outer control cylinder member to be controlled,
The switching valve of the outer control cylinder member is rotatably attached to the side wall of the outer control cylinder member, and is rotated from the predetermined upper position where the opening of the outer control cylinder member is closed to the outside of the outer control cylinder member. A switching valve body that can move to a predetermined lower position that opens and opens the opening of the outer control cylinder member, a plate-like weight, and the weight that is provided on the switching valve body and is detachably attached. A weight mounting portion, and the weight mounting portion includes a support portion that supports an upper end and a lower end of the weight, and a fixing portion that is provided on a side of the support portion and fixes the side portion of the weight. The fixing portion has an elasticity that allows the weight and the fixing portion to elastically contact each other so that the weight can pass through the fixing portion when the weight is attached to and detached from the support portion. A drain valve device comprising a contact means.   The weight of the switching valve of the outer control cylinder member is movable in the horizontal direction while the weight and the fixed portion are elastically contacted by the elastic contact means when attached to the weight mounting portion. 2. The drain valve device according to claim 1, wherein the drain valve device is fixed to the switching valve body by the support part and a side surface of the fixing part after being inserted between the switching valve body and the support part and releasing the elastic contact. .   The elastic contact means of the fixed portion includes a base end projecting a predetermined length outward from the outer surface of the switching valve main body, and a predetermined distance above the outer surface of the switching valve main body from the base end to a predetermined length upward. An elastic fastener having an extended distal end portion, and the elastic fastener further includes a fixed end and a free end when the weight is attached to the weight attachment portion. Elastic deformation extending from the base end portion to the distal end portion so that the weight can be elastically deformed in the out-of-plane direction of the outer surface of the switching valve main body so that the weight can pass between the switching valve main body and the elastic fastener. The elastic deformation portion, when the attachment of the weight to the weight attachment portion is completed, the elastic deformation returns so that the side surface of the weight and the side surface of the elastic fastener abut on each other, The drain valve device according to claim 1, wherein the weight is fixed in a horizontal direction.   A washing water tank device comprising the drain valve device according to any one of claims 1 to 3.

Images