JP2015031000A - Drain valve device and wash water tank device equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide: a drain valve device capable of stabilizing the operation associated with discharge of wash water and preventing the drain valve device from being early closed, while avoiding trouble due to freezing in a clearance between a float and a water storage cylinder; and a wash water tank device equipped with the drain valve device.SOLUTION: A drain valve device 40 provided in a wash water tank for storing wash water supplied to a toilet bowl includes adjustment means 51 which makes a flow channel 71 formed between a float 50 and an inside face 47a of a water storage cylinder 43 and allowing passage of water narrower during valve-closing of a valve body 41 than during valve-opening of the valve body 41.

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 that uses buoyancy due to a float for opening and closing the drain valve and a flush water tank device including the drain valve device.

  Conventionally, a washing water tank device for storing and draining washing water for washing toilet bowls has a structure that uses buoyancy caused by a float to open and close a drain valve that opens and closes a drain outlet for discharging washing water supplied to the toilet bowl. There is something. Specifically, this type of cleaning water tank device includes a drain valve device for discharging the cleaning water in a cleaning water tank that stores the cleaning water. The drain valve device has a drain valve that is provided at the bottom of the wash water tank and opens and closes a drain port that discharges wash water, and a float that acts on the valve body of the drain valve in conjunction with the water level in the wash water tank by buoyancy. Prepare.

  The float provided in the drain valve device is opened by giving buoyancy to the valve body until the water level that falls around the float reaches a predetermined water level in the process of draining the drain valve and discharging the wash water in the wash water tank. Maintain valve status. Such a float is provided in a state in which it is disposed inside a water storage cylinder that has a small hole for containing washing water for giving buoyancy to the float and for allowing the contained washing water to flow out.

  In such a drain valve device, there is a configuration in which the valve body of the drain valve is provided integrally with the operating rod at the lower end portion of the operating rod which is a rod-like member such as an overflow pipe. In such a configuration, the operating rod is pulled up by the operation of the operating portion such as the operating lever, the valve body is raised together with the operating rod, and the drain valve is opened. Thus, in the structure provided with the operating rod integral with the valve body of the drain valve, the float as described above has a cylindrical outer shape and is provided in a mode in which the operating rod is penetrated.

  With regard to the relationship between the operating rod and the float, as a conventional technique, a configuration in which the operating rod and the float are integrally provided (for example, see Patent Document 1), and the operating rod and the float are independent of each other. There is a configuration (see, for example, Patent Document 2) provided as a separate body so that it can operate. That is, when the operating rod rises due to the operation of the operation unit as described above, in the former configuration, the float rises integrally with the operating rod, and in the latter configuration, the float increases with the operating rod. Will rise to follow the operating rod.

JP 2003-49470 A JP 2011-241553 A

  Regarding the washing water tank apparatus as described above, in order to avoid the influence on the apparatus due to freezing of the water in the washing water tank, for example, in a cold region, an operation of draining all the water in the washing water tank may be performed. is there. However, since the gap between the float and the water storage cylinder that accommodates the float, that is, the clearance between the outer peripheral surface of the float and the inner peripheral surface of the water storage cylinder is narrow, drainage is insufficient and water may remain in this clearance. In such a case, as described above, in the configuration in which the operating rod and the float are integrated, the water remaining between the float and the water reservoir is temporarily frozen and the float sticks to the water reservoir, If the operating rod is forcibly pulled up by the operation of the operation unit, damage may occur in the float portion or the like.

  As a method for solving the problem due to freezing in the gap between the float and the water tank, the outer diameter of the float is made small (thickness is made thin), and the gap between the float and the water bottle is widened. Can be considered. However, when the float is thinned, the float buoyancy is insufficient and the float is difficult to rise, so that the drain valve in the opened state closes earlier than a predetermined timing, so-called premature closing occurs, and the toilet bowl Sufficient drainage may not be obtained for the wash water drained into the water.

  On the other hand, in the configuration in which the operating rod and the float are separated as described above, there are the following problems although there is no problem due to freezing as described above. In the configuration in which the operating rod and the float operate separately and independently from each other, (1) the operation unit such as an operation lever is operated as the washing water discharging operation in the drain valve device, (2) the operating rod is The drain valve opens to open the valve, (3) the float rises, and (4) the float descends and the drain valve closes as the water level drops.

  In such a configuration in which the washing water is discharged, if the gap between the float and the water storage cylinder is narrow, replacement of water around the float in the water storage cylinder is difficult to occur. A time lag occurs between the operations 2) and (3). As a result, since the water level around the float begins to drop before the float rises to the highest point, the operation of the float or the like varies depending on the pulling speed of the operating rod in the operation (2).

  On the contrary, when the gap between the float and the water storage cylinder becomes wide, the above-mentioned problem of the variation in the operation due to the time lag is solved. However, in the operation (4), when the drain valve is closed, the float moves downward. It becomes easy to be drawn in, and early closing occurs.

  The present invention has been made in view of the circumstances as described above, and is capable of stabilizing the operation associated with the discharge of the washing water while avoiding problems due to freezing in the gap between the float and the water storage cylinder, and closes quickly. It is an object of the present invention to provide a drainage valve device that can prevent water and a washing water tank device including the drainage valve device.

  In order to achieve the above object, in the drainage valve device according to the first aspect of the present invention, the drainage valve device is provided in a flushing water tank for storing flushing water supplied to a toilet, A valve body that opens and closes a drain port provided at the bottom of the tank is provided at the lower end, and an operating rod that opens and closes the drain port by moving up and down, and penetrates the operating rod in the cylinder axis direction And a water storage cylinder in which a small hole for allowing the washing water to flow out is formed, and a float that is arranged in the water storage cylinder so as to be movable up and down, and that causes buoyancy obtained by the washing water in the water storage cylinder to act on the operating rod. And a flow path that is formed between the float and the inner surface of the water storage cylinder, and the flow path is narrower when the valve body is closed than when the valve body is opened. And adjusting means.

  According to the drain valve device having such a configuration, it is possible to stabilize the operation accompanying the discharge of the washing water while preventing the trouble due to freezing in the gap between the float and the water storage cylinder, and it is possible to prevent early closing. .

  A drainage valve device according to a second aspect of the present invention is the drainage valve device according to the first aspect, wherein the adjusting means can contact and separate from the bottom surface of the float, and the operating rod It is comprised by the flat plate-shaped regulating valve penetrated. According to the drain valve device having such a configuration, the flow passage area can be adjusted by adjusting the size and specific gravity of the regulating valve, so avoiding problems due to freezing in the gap between the float and the water storage cylinder, Adjustment of the flow path area can be easily realized with a relatively simple structure.

  A drainage valve device according to a third aspect of the present invention is the drainage valve device according to the second aspect, wherein the specific gravity of the regulating valve is smaller than water and larger than the float. And According to the drain valve device having such a configuration, since the regulating valve can be raised later than the float while the valve body is closed, the float can be quickly raised. Thereby, the behavior of the operating rod immediately after the pulling, that is, the behavior of the valve body can be further stabilized. As a result, it is possible to effectively suppress variations in operation due to the pulling speed of the operating rod.

  A drainage valve device according to a fourth aspect of the present invention is the drainage valve device according to the second aspect or the third aspect, wherein the movable range of the regulating valve is restricted within a certain range from the bottom surface of the float. The regulating valve is capable of moving up and down within the certain range. According to the drain valve device having such a configuration, since the regulating valve can be brought into contact with the float at a relatively early stage while the valve body is closed, the operation accompanying the discharge of the washing water can be further stabilized. And can prevent premature closing.

  A drainage valve device according to a fifth aspect of the present invention is the drainage valve device according to the fourth aspect, wherein the restricting portion is formed from a protrusion and a lower end thereof standing downward from the bottom surface of the float. It is formed in a L-shaped vertical section by a bent portion bent in the axial direction of the float, and the adjusting valve is movable up and down inside the restricting portion. According to the drain valve device having such a configuration, the regulation of the movable range of the regulating valve can be realized with a simple configuration.

  The washing water tank apparatus according to the present invention includes the drain valve apparatus according to any one of the first to fifth aspects. According to the washing water tank having such a configuration, in the drain valve device, it is possible to stabilize the operation accompanying the discharge of the washing water regardless of the area of the gap between the float and the water storage cylinder, and to prevent premature closing. Can do.

  ADVANTAGE OF THE INVENTION According to this invention, the operation | movement accompanying discharge of wash water can be stabilized, avoiding the malfunction by freezing in the clearance gap between a float and a water storage cylinder, and a premature closing can be prevented.

It is a figure which shows the example of application of the washing water tank apparatus which concerns on one Embodiment of this invention. 1 is a front sectional view showing a configuration of a cleaning water tank device according to an embodiment of the present invention. It is sectional drawing which shows the structure of the drain valve apparatus which concerns on one Embodiment of this invention. It is a disassembled perspective view which shows the structure of the drain valve apparatus which concerns on one Embodiment of this invention. It is a perspective view which shows the structure of the control cylinder which concerns on one Embodiment of this invention. It is a perspective view which shows the structure of the float and adjustment valve which concern on one Embodiment of this invention. It is a partial cross section perspective view which shows the structure of the drain valve apparatus which concerns on one Embodiment of this invention. It is a side view showing the appearance of the drain valve device concerning one embodiment of the present invention. It is operation | movement explanatory drawing of the drain valve apparatus which concerns on one Embodiment of this invention. It is operation | movement explanatory drawing of the drain valve apparatus which concerns on one Embodiment of this invention. It is operation | movement explanatory drawing of the drain valve apparatus which concerns on one Embodiment of this invention.

  The present invention uses a buoyancy caused by a float arranged in a water storage cylinder to open and close a drain valve that opens and closes a drain outlet for discharging wash water supplied to a toilet. By narrowing the water flow path formed between the valve body and the valve body while the valve body is closed, the trouble caused by freezing in the gap between the float and the water storage cylinder is avoided. It is intended to stabilize the operation of the drain valve and prevent premature closing. Embodiments of the present invention will be described below.

  First, an application example of the cleaning water tank apparatus according to the present embodiment will be described with reference to FIG. FIG. 1 is a partial cross-sectional view of a flush toilet to which a flush water tank apparatus according to this embodiment is applied.

  As shown in FIG. 1, a flush water tank device 1 according to the present embodiment is provided for a flush toilet 2, storing flush water for washing the flush toilet 2, and draining flush water to the flush toilet 2. I do. The flush toilet 2 includes a bowl portion 3 that receives wash water supplied from the wash water tank device 1, a rim portion 4 formed on the upper edge of the bowl portion 3, and wash water discharged from the wash water tank device 1. And a water conduit 5 for guiding the water to the bowl portion 3. On the inner wall surface of the upper end portion of the bowl portion 3, a water discharge port 6 for discharging the cleaning water supplied from the water conduit 5 is opened. The washing water discharged from the water discharge port 6 descends while swirling along the wall surface of the bowl portion 3 to wash the bowl portion 3. In addition, although illustration is omitted, in the flush toilet 2, in order to generate a swirl flow that swirls the water trapping pipe line communicating with the water storage part below the bowl part 3 and the water stored in the water storage part in the vertical direction. In addition, a water discharge port or the like for discharging wash water from the water conduit 5 at a position above the water reservoir is formed.

  In such a flush toilet 2, the flush water tank apparatus 1 is provided in a state where it is placed and fixed on the rear upper surface where the inflow side opening of the water conduit 5 of the flush toilet 2 is located. That is, the flush water tank device 1 is provided such that the drain port 14 provided at the bottom 12a (see FIG. 2) of the flush water tank 12 faces the water conduit 5 from above. Then, the wash water discharged from the wash water tank 12 is drained to the water conduit 5 through the drain port 14 and supplied to the bowl portion 3. In addition, the flush water tank apparatus 1 according to the present embodiment includes a flush toilet bowl 2 that extrudes filth by a flowing water action by a water drop as shown in FIG. 1, and other types of flush toilet bowls (for example, siphons). It is also applicable to siphon-type toilets etc. that discharge as if filth is sucked by action.

  Next, the configuration of the cleaning water tank apparatus 1 according to this embodiment will be described. As shown in FIG. 2, the washing water tank apparatus 1 according to this embodiment includes an exterior tank 11 and a washing water tank 12 that is provided in the exterior tank 11 and stores washing water supplied to the flush toilet 2. Prepare. The exterior tank 11 is composed of, for example, a member made of earthenware, and is a box-shaped member opened on the upper side. The main body 11a forms a space for accommodating the cleaning water tank 12, and the upper opening of the main body 11a. And a lid 11b attached so as to cover.

  The lid body 11b constituting the exterior tank 11 is formed with a hand-washing bowl 11c on the upper surface side. On the hand-washing bowl 11c, the water discharging part 11d which discharges water toward the hand-washing bowl 11c is standingly arranged. The water in the washing water tank 12 is supplied from the water discharger 11d and discharged. The water discharged from the water discharge part 11d is discharged from the discharge port 11e provided in the center part of the hand-washing bowl 11c, and flows into the washing water tank 12. The water flowing into the washing water tank 12 from the discharge port 11e is guided to a predetermined place in the washing water tank 12 by the water guide member 13 provided below the lid body 11b.

  The washing water tank 12 is provided in a fixed state inside the main body portion 11 a constituting the exterior tank 11. As described above, the drain port 14 facing the water conduit 5 is provided at a substantially central portion of the bottom 12a of the cleaning water tank 12. The drain port 14 is provided as a cylindrical projecting portion that opens the bottom 12a of the cleaning water tank 12 and projects downward from the bottom 12a and opens downward. The drain port 14 allows the water storage space of the cleaning water tank 12 to communicate with the water conduit 5. The washing water tank 12 is fixed by a predetermined engaging member 15 in a state where a cylindrical drainage port 14 is passed through the bottom portion 11 f of the exterior tank 11. The washing water tank 12 is fixed to the bottom portion 11f of the exterior tank 11 by a fixing member 17 at a plurality of (two places in FIG. 2) fixing portions 16 provided around the drain port 14 at the bottom portion 12a. The Further, most of the washing water tank 12 is covered with a heat insulator 18.

  The washing water tank apparatus 1 is operated by the washing water supply apparatus 20 for supplying water into the washing water tank 12, the operation apparatus 30 that operates in response to an operation by a user, and the operation apparatus 30. And a drain valve device 40 for discharging the inside of the tank 12.

  The washing water supply device 20 will be described with reference to FIG. As shown in FIG. 2, the cleaning water supply device 20 includes a water supply pipe 21, a water supply valve 22, a water discharge pipe 23, a water supply apparatus float 24, and a hand-washing water supply pipe 25.

  The water supply pipe 21 is connected to a water supply source such as a water pipe outside the exterior tank 11 and receives water supplied from the water supply source. The water supply valve 22 is a valve mechanism that opens and closes a water supply path from the water supply pipe 21. The water discharge pipe 23 communicates with the water supply pipe 21 via the water supply valve 22 and discharges the water supplied from the water supply source into the washing water tank 12. The water supply device float 24 is provided on the lower end side of the rod 26a extending in the vertical direction, and is connected to the water supply valve 22 via the rod 26a and an operating arm 26b connected to the upper end portion of the rod 26a.

  In the cleaning water supply device 20, the water supply valve 22 opens and closes via the rod 26 a and the operating arm 26 b as the water supply device float 24 moves up and down due to fluctuations in the water level in the cleaning water tank 12, and the cleaning water tank 12. The cleaning water level inside is adjusted. In the present embodiment, water supply by the cleaning water supply device 20 is started after the drainage from the cleaning water tank 12 is started by the operation of the drain valve device 40. Further, the cleaning water supply device 20 of the present embodiment is configured such that the level of the cleaning water when the cleaning water tank 12 is full is constant at a predetermined water level (see FIG. 2, position A1).

  Further, in the washing water supply device 20, the hand-washing water supply pipe 25 has a piping configuration in which the water supply path from the water supply source is branched, and the water supply portion distributed on the water supply path from the water supply source is the water discharger on the hand-washing bowl 11c. 11d. The cleaning water supply device 20 starts supplying water to the water discharger 11d through the water supply pipe 25 at the start of supply of cleaning water from the cleaning water tank device 1 to the flush toilet 2 (at the start of drainage). In addition, since the thing of a known structure can be employ | adopted as the washing water supply apparatus 20, description is abbreviate | omitted about the specific structure of each part of the washing water supply apparatus 20. FIG.

  The operating device 30 will be described with reference to FIG. As shown in FIG. 2, the operation device 30 is activated by receiving an operation by a user or the like, and activates the drain valve device 40. The operation device 30 includes an operation lever 31, a rotation transmission member 32, a first pulling member 33, a second pulling member 34, a first ball chain 35, and a second ball chain 36. .

  The operation lever 31 is a manual operation unit that is provided outside the exterior tank 11 and is rotated by a user or the like. In the example shown in FIG. 2, the operation lever 31 is provided so as to protrude from the side wall of the main body 11a. As the operation of the operation lever 31, a large washing operation or a small washing operation is performed depending on the direction in which the operation lever 31 rotates. That is, the operation device 30 performs a large washing operation on the drain valve device 40 when the operation lever 31 is rotated about 90 ° in one direction (for example, the front side in FIG. 2). Is rotated about 90 ° in the other direction (for example, the back side in FIG. 2), a small cleaning operation is performed on the drain valve device 40. Here, the large washing is a washing mode in which the amount of washing water discharged from the washing water tank apparatus 1 to the flush toilet 2 is relatively larger than that of the small washing.

  The rotation transmission member 32 is configured by a shaft body, a wire member, a universal joint, or the like, and has a shaft-like structure that rotates in conjunction with the rotation operation of the operation lever 31. The rotation transmitting member 32 is connected to an operation lever 31 provided outside the exterior tank 11 via a connection mechanism 37 and extends in a substantially horizontal direction inside the exterior tank 11. A first pulling member 33 and a second pulling member 34 are provided on the opposite side of the rotation transmitting member 32 to the side (right side in FIG. 2) connected to the operation lever 31.

  The first pulling member 33 and the second pulling member 34 are arranged at a substantially central portion in the width direction (left and right direction in FIG. 2) of the exterior tank 11, and both are externally fitted to the rotation transmitting member 32. It is an arm-shaped member provided so as to extend downward from the rotation transmitting member 32. Both the first pulling member 33 and the second pulling member 34 swing with the rotation of the rotation transmitting member 32. One end (upper end) of the first ball chain 35 is connected to the front end portion of the first pulling member 33, and one end (upper end) of the second ball chain 36 is connected to the front end portion of the second pulling member 34. Are concatenated. The other ends of the first ball chain 35 and the second ball chain 36 are respectively connected to predetermined places in the drain valve device 40.

  The first pulling member 33 and the second pulling member 34 are provided so that the following operation is performed on the rotation transmitting member 32. When the rotation transmitting member 32 is rotated in one direction as a large washing operation, only the first pulling member 33 swings in one direction and pulls up the first ball chain 35 with the rotation. . When the rotation transmitting member 32 is rotated in the other direction as an operation for small cleaning, both the first pulling member 33 and the second pulling member 34 swing in the other direction along with the rotation. Then, the first ball chain 35 and the second ball chain 36 are pulled up. In the present embodiment, the operation device 30 is configured to receive a mechanical operation by the operation lever 31. In addition to the mechanical operation, for example, the operation device 30 is connected to a motor that rotates the rotation transmission member 32. A configuration in which an electrical operation is performed by operating an operation button may be used.

  The drain valve device 40 will be described with reference to FIGS. The drain valve device 40 is provided in the washing water tank 12 that stores the washing water supplied to the flush toilet 2, and is configured to discharge the washing water in the washing water tank 12. The drain valve device 40 includes a valve body 41, an overflow pipe 42 as an operating rod, a water storage cylinder 43, a float 50, an adjustment valve (adjusting means) 51, and a regulating portion 52.

  The valve body 41 opens and closes the drain port 14 provided in the bottom 12 a of the cleaning water tank 12. The valve body 41 is an elastic member made of a synthetic resin material such as rubber, has an annular shape, and protrudes in a bowl shape from the outer peripheral surface of the overflow pipe 42 at the lower end portion of the overflow pipe 42. Provided. In the present embodiment, the valve element 41 is fitted between the overflow pipe 42 and the upper and lower two-stage bowl-shaped sandwiching piece parts 42 a provided with a predetermined gap in the vertical direction at the lower end of the overflow pipe 42. Provided integrally.

  The overflow pipe 42 places the upper end opening above the water level of the washing water tank 12 in the standby state of the washing water tank device 1, that is, the full state of the washing water tank 12, and communicates the lower end opening to the drain port 14. Let As a result, excess cleaning water in the cleaning water tank 12 is discharged to the drain port 14 through the overflow pipe 42.

  The overflow pipe 42 has a valve body 41 at its lower end and moves up and down to open and close the drain port 14 by the valve body 41. That is, the overflow pipe 42 has the valve body 41 provided in a mode sandwiched between the upper and lower sandwiching piece portions 42a provided at the lower end portion as described above, and the upper and lower sides are integrally formed with the valve body 41. Perform the action. The drain port 14 is opened and closed by a valve body 41 that moves up and down together with the overflow pipe 42. Thus, the valve body 41 that operates integrally with the overflow pipe 42 constitutes a drain valve that opens and closes the drain port 14.

  The intermediate portion of the overflow pipe 42 is provided with the stop member 44 to which the other end (lower end) of the first ball chain 35 whose one end (upper end) is connected to the first pulling member 33 is connected as described above. ing. The stop member 44 has an annular or cylindrical main body portion 44a in which a part in the circumferential direction is cut off. The main body portion 44a is a reduced diameter portion formed in the intermediate portion of the overflow pipe 42. It is provided in a state of being fitted into a certain recess 42b. In the state where the stopper member 44 is fitted in the recess 42b, relative movement is restricted (positioned) in the axial direction (vertical direction) of the overflow pipe 42, and the axial direction of the overflow pipe 42 is set as the rotational axis. It is held in the overflow pipe 42 in a state where relative rotation in the horizontal direction is allowed.

  With such a configuration, the first ball chain 35 is pulled up by the swing of the first pulling member 33 accompanying the rotation of the rotation transmitting member 32 in conjunction with the operation of the operation lever 31 as described above. The overflow pipe 42 to which the lower end side of the first ball chain 35 is connected via the stop member 44 is pulled up. Thereby, the overflow pipe 42 and the valve body 41 are integrally raised and the drain port 14 is opened. Here, the valve body 41 is pressed in the direction (vertically downward) to close the drain port 14 by gravity acting on the cleaning water stored in the cleaning water tank 12 (by the head pressure). When the ball chain 35 is pulled up, the stop member 44 first rotates with respect to the overflow pipe 42, and then the overflow pipe 42 is pulled up vertically.

  The water storage cylinder 43 has a structure in which small holes 43a and 43b (see FIG. 5) for allowing the overflow water to flow through the overflow pipe 42 in the cylinder axis direction are formed. The water storage cylinder 43 forms a space for storing cleaning water for providing buoyancy to the float 50 and discharges the stored cleaning water from the small holes 43a and 43b in the course of draining the cleaning water from the drain port 14. .

  The water storage cylinder 43 is configured as a part of a control cylinder 45 that allows the overflow pipe 42 to penetrate in the cylinder axis direction. The control cylinder 45 has a substantially cylindrical outer cylinder part 47 and a substantially cylindrical inner cylinder part 48 provided coaxially with the outer cylinder part 47 on the inner side of the outer cylinder part 47, and 2 It has a heavy cylinder structure. Both the outer cylinder part 47 and the inner cylinder part 48 are open at both ends in the cylinder axis direction (vertical direction).

  Between the outer cylinder part 47 and the inner cylinder part 48, the horizontal partition part 49 which connects these is provided. The horizontal partition wall portion 49 is provided at a position closer to the lower side than the center in the vertical direction of the outer cylinder portion 47 and at the lower end portion of the inner cylinder portion 48. The horizontal partition wall 49 is an annular plate-like portion that connects the inner peripheral surface 47 a of the outer cylindrical portion 47 and the outer peripheral surface 48 a of the inner cylindrical portion 48 in the double cylinder structure of the control cylinder 45.

  With such a configuration, in the control cylinder 45, a cylinder capable of storing water that opens upward by the inner peripheral surface 47 a of the outer cylinder portion 47, the outer peripheral surface 48 a of the inner cylinder portion 48, and the upper surface 49 a of the horizontal partition wall portion 49. A shaped space is formed. Such a cylindrical space is a space that accommodates the float 50 and cleaning water for providing buoyancy to the float 50. Thus, the part which forms cylindrical accommodation space in the control cylinder 45 becomes the water storage cylinder 43 as a water storage part. The inner side surface of the water storage cylinder 43 refers to the inner peripheral surface 47 a of the outer cylinder portion 47 and the outer peripheral surface 48 a of the inner cylinder portion 48.

  In the water storage cylinder 43, the overflow pipe 42 penetrates into the inner cylinder portion 48. The inner cylinder portion 48 has a function of guiding the vertical movement of the overflow pipe 42. Further, in the water storage cylinder 43, two small holes 43a and 43b are formed in the peripheral wall of the outer cylinder portion 47 so as to penetrate the peripheral wall.

  The small holes 43a and 43b are openings for discharging the wash water stored in the water storage cylinder 43 from the water storage cylinder 43 at a predetermined flow rate. The two small holes 43a and 43b are provided at predetermined intervals in the circumferential direction at substantially the same height position at the lower end portion of the peripheral wall of the outer cylindrical portion 47 (see FIG. 5). Here, of the two small holes 43a and 43b, one small hole 43a is configured to be opened and closed by sliding movement of a plate-like switching member 46 attached to the outer peripheral side of the outer cylinder portion 47 so as to be slidable up and down. ing. That is, the flow rate of the washing water flowing out from the water storage cylinder 43 is adjusted by opening and closing the small hole 43 a by the switching member 46. In the present embodiment, the small holes for discharging the cleaning water in the water storage cylinder 43 are provided at two places, but the small holes may be provided at least at one place. Further, in the present embodiment, the small holes 43 a and 43 b are formed in the peripheral wall that is a side surface portion in the outer cylinder portion 47, but for example, penetrate in the vertical direction in the horizontal partition wall portion 49 that constitutes the water storage cylinder 43. May be formed.

  The control cylinder 45 constituting the water storage cylinder 43 has its lower opening end, that is, the lower opening end of the outer cylinder portion 47, facing the drain port 14 opened to the bottom 12a of the washing water tank 12. It is provided in a state standing on the bottom 12a. That is, the control cylinder 45 is disposed so as to cover the opening of the drain port 14 into the cleaning water tank 12, and is provided so that the internal space of the control cylinder 45 and the internal space of the drain port 14 communicate with each other. . Further, a portion below the water storage tube 43 configured in the control tube 45, that is, an extending portion below the horizontal partition wall portion 49 of the outer tube portion 47 configuring the water storage tube 43, An inflow port 45b that communicates the inside and the outside is formed. The inflow port 45 b allows the cleaning water outside the control cylinder 45 to enter the control cylinder 45 at a portion below the water storage cylinder 43 of the control cylinder 45 when discharging from the drain 14 of the cleaning water in the cleaning water tank 12. Let it flow into the drain port 14.

  The float 50 is a cylindrical member that is disposed in the water storage cylinder 43 configured in the control cylinder 45 as described above, and causes the buoyancy obtained by the wash water in the water storage cylinder 43 to act on the overflow pipe 42. The float 50 moves up and down by buoyancy as the water level of the cleaning water in the water storage cylinder 43 changes.

  The float 50 is a hollow member made of a synthetic resin material such as polypropylene and having a cylindrical outer shape. The float 50 is provided in a state in which the inner cylinder portion 48 is passed through the water storage cylinder 43 that forms a cylindrical space that opens upward. The float 50 moves up and down so that a part of the upper side protrudes from the opening on the upper side of the water storage cylinder 43 as the water level of the cleaning water in the water storage cylinder 43 changes.

  The float 50 acts on the overflow pipe 42 by being restricted by the stop member 44 provided on the overflow pipe 42 as described above when rising due to the buoyancy obtained from the wash water in the water storage cylinder 43. The stop member 44 has a stop piece portion 44b that protrudes outside the main body portion 44a in order to restrict the rise of the float 50. The stopper piece 44b is a protruding piece that protrudes along the radial direction of the main body 44a from the outer peripheral surface of the annular or cylindrical main body 44a, and the circumferential direction of the main body 44a is the plate thickness direction. In the present embodiment, the stopper pieces 44b are provided at four locations at substantially equal intervals in the circumferential direction of the main body 44a so as to be radial when viewed from the axial direction of the overflow pipe 42 (see FIG. 4).

  The stop member 44 that protrudes the stop piece 44b as a stop portion for the float 50 as described above functions as a stopper of the float 50 by contacting the upper end surface of the float 50 that rises due to buoyancy, and also due to the buoyancy of the float 50. It functions as a buoyancy receiving portion that receives the lifting action and transmits the buoyancy action to the overflow pipe 42. The stopper piece 44b has a shape and a size that can exert these functions.

  The buoyancy of the float 50 is such that when the wash water tank 12 is full, the overflow pipe 42 pressed downward through the valve body 41 by the water pressure (head pressure) of the wash water does not rise. When draining from the washing water tank 12, the downward force acting on the valve body 41 and the overflow pipe 42 is set to be slightly larger.

  The regulating valve 51 is located between the float 50 and the inner surface of the water storage cylinder (the inner peripheral surface 47a of the outer cylindrical portion 47 and the outer peripheral surface 48a of the inner cylindrical portion 48) with the float 50 positioned in the water storage cylinder 43. It is a flat ring-shaped member that narrows the formed flowable channel 71 while the valve element 41 is closed compared to when the valve element 41 is opened (see FIG. 4). Here, in the present embodiment, when the valve body 41 is open, the overflow pipe 42 is moved from the state where the overflow pipe 42 is positioned at the lowermost end (the state where the drain port 14 is closed by the valve body 41) to the uppermost end. It refers to the process until it reaches a position. Further, when the valve body 41 is closed, the state where the overflow pipe 42 is located at the uppermost end to the state where the overflow pipe 42 is located at the lowermost end (a state where the drain port 14 is closed by the valve body 41). Refers to the process.

  In the present embodiment, as the flow path 71, a flow path 71 a formed between the float 50 and the inner peripheral surface 47 a of the outer cylinder portion 47 and a gap between the float 50 and the outer peripheral surface 48 a of the inner cylinder portion 48. There is a flow path 71b formed in (see FIG. 3).

  The regulating valve 51 penetrates the inner cylinder portion 48 in a water storage cylinder 43 that forms a cylindrical space that opens upward, below the float 50 and in contact with and away from the bottom surface 50 a of the float 50. Provided in such a manner. Similar to the float 50, the adjustment valve 51 moves up and down by buoyancy as the water level of the cleaning water in the water storage cylinder 43 changes.

  The regulating valve 51 has an inner edge diameter B1 larger than the outer diameter C1 of the inner cylinder portion 48 and smaller than the inner diameter D1 of the float 50, an outer edge diameter B2 larger than the inner diameter D1 of the float 50, and the outside of the float 50. It is formed to be smaller than the diameter D2. As a result, the adjustment valve 51 comes into contact with the float 50 and is restricted from rising when rising due to buoyancy obtained from the wash water in the water storage cylinder 43. The specific gravity of the regulating valve 51 is set so as to be smaller than that of water and larger than that of the float 50.

  The regulating part 52 is a member that regulates the movable range of the regulating valve 51 within a certain range from the bottom surface 50a of the float 50 (see FIG. 3). The restricting portion 52 includes a protruding portion 52a that is erected downward from the substantially center of the bottom surface 50a of the float 50, and a bent portion 52b that is bent from the lower end of the protruding portion 52a toward the axial center of the float 50. The protruding portion 52a and the bent portion 52b are formed in an L-shaped vertical section.

  The bent portion 52b is a plate-like portion that is substantially parallel to the bottom surface 50a of the float 50. In the bent portion 52b, the upper surface facing the bottom surface 50a is connected to a regulating surface 52c that receives contact with the regulating valve 51. Become. That is, the restricting portion 52 is a restriction that faces the bottom surface 50a at a position separated from the bottom surface 50a of the protruding portion 52a by a bent portion 52b that is bent from the protruding portion 52a toward the axial center of the float 50. This is a portion that forms the surface 52c, and by receiving the contact of the regulating valve 51 on the regulating surface 52c, the movement of the regulating valve 51 away from the float 50 (the lower side in FIG. 3) is regulated.

  In the present embodiment, the restricting portions 52 are provided at two locations that are point-symmetric about the axis of the float 50 on the bottom surface 50a of the float 50 (see FIG. 6). Accordingly, the two restricting portions 52 oppose the protruding directions of the bent portions 52b bent in an L shape with respect to the protruding portions 52a.

  The adjustment valve 51 moves up and down inside the regulating portion 52 as the water level of the cleaning water in the water storage cylinder 43 varies. That is, the regulating valve 51 can move up and down within the range from the bottom surface 50a of the float 50 to the regulating surface 52c that is the upper surface of the bent portion 52b of the regulating portion 52. In other words, the regulating valve 51 located below the float 50 floats in a range from a position contacting the bottom surface 50a of the float 50 on the upper side to a position contacting the regulating surface 52c of the regulating portion 52 on the lower side. The range of vertical movement relative to 50 is used.

  When the float 50 in which the restricting portion 52 is formed and the adjusting valve 51 are arranged in the water storage cylinder 43, first, the adjusting valve 51 is placed in the restricting portion 52 from a direction orthogonal to the axial center direction of the float 50. Arrange (see FIG. 6). That is, a plate-like regulating valve is formed in a horizontally long, substantially rectangular opening formed by the bottom surface 50a of the float 50, the inner surface of the protrusion 52a of the restriction portion 52, and the restriction surface 52c facing the bottom surface 50a. Insert 51. Thereafter, the inner cylinder portion 48 is passed through the float 50 and the opening of the adjustment valve 51 in a state where the adjustment valve 51 is disposed in the restriction portion 52. In this manner, the float 50 in which the restricting portion 52 is formed and the regulating valve 51 are arranged in the water storage cylinder 43. The distance L1 between the two protrusions 52a is larger than the outer edge diameter B2 of the regulating valve 51.

  In the drain valve device 40, a control cylinder 45 that constitutes a water storage cylinder 43 that accommodates the float 50, the adjustment valve 51, and the restriction portion 52 is accommodated in the rectangular cylinder 60. The rectangular tube body 60 is a substantially rectangular tube-shaped casing having a substantially rectangular cross-sectional shape. The upper end portion of the rectangular tube body 60 is opened in a quadrangular shape along the substantially rectangular tube-shaped outer shape of the rectangular tube body 60, and there are four upper edge portions 60a as opening edges. In addition, an opening 60 b is provided on the lower end side of the rectangular tube 60, in which the bottom surface of the rectangular tube 60 is opened in a circular shape. And the square cylinder 60 accommodates the control cylinder 45 so that the lower end part of the control cylinder 45 may be fitted in the lower opening 60b.

  As described above, the rectangular cylinder 60 and the control cylinder 45 provided in the rectangular cylinder 60 are attached in a state of being erected on the bottom portion 12 a so as to surround the drain port 14 that opens to the bottom portion 12 a of the cleaning water tank 12. . The overflow pipe 42 is provided so as to be movable up and down in a state of being inserted through the inner cylinder portion 48 of the water storage cylinder 43 configured in the control cylinder 45, and by the valve body 41 provided at the lower end portion of the overflow pipe 42, The drain port 14 is opened and closed as the overflow pipe 42 moves up and down.

  The rectangular cylindrical body 60 has a rectangular opening 60c on one side surface (right side in FIG. 3). The opening 60 c is provided in the lower portion of the side surface of the rectangular tube body 60. As described above, the rectangular cylinder 60 erected so as to surround the drain port 14 together with the control cylinder 45 is opposite to the small holes 43a and 43b side of the control cylinder 45 on the opening 60c side in relation to the control cylinder 45. It is provided so that it may be located in the side. The opening 60c of the rectangular tube 60 is provided with a double valve including a first switching valve 61 and a second switching valve 62 that open and close the opening 60c stepwise in terms of opening area. A flow rate adjusting mechanism is configured to adjust the amount of cleaning water flowing from the outside of the rectangular tube 60 into the rectangular tube 60 when the cleaning water is discharged.

  Each of the first switching valve 61 and the second switching valve 62 is a substantially rectangular plate-shaped member corresponding to the rectangular opening 60 c, and rotates so as to close the opening 60 c from the outside of the rectangular tube body 60. It is provided in a supported state. The first switching valve 61 and the second switching valve 62 are provided in such a manner that the first switching valve 61 is located on the inner side and the second switching valve 62 is located on the outer side with respect to the opening 60c so as to overlap each other.

  The first switching valve 61 and the second switching valve 62 are both supported so that the lower end portions of the substantially rectangular plate-shaped outer shape can rotate at a common position. Specifically, in the rectangular tube 60, a shaft support portion 60d that protrudes in the left-right direction with the opening 60c in front is provided below the side-side opening 60c where the opening 60c is formed. (See FIG. 4). On the other hand, the first switching valve 61 is rotatably fitted to the shaft support portion 60d in such a manner that the shaft support portion 60d is sandwiched from both sides in the axial direction and at the position of the shaft support portion 60d in the axial direction of the shaft support portion 60d. It has a pair of support protrusions 61a provided with shaft support portions 61b protruding on both sides, and is supported rotatably on the shaft support portion 60d by the pair of support protrusions 61a. In addition, the second switching valve 62 is provided with a pair of support holes 62b that fit into the shaft support portion 61b in such a manner as to sandwich the shaft support portion 61b of the support protrusion piece 61a of the first switch valve 61 from both sides in the axial direction. And a pair of support protrusions 62a are rotatably supported by the shaft support 61b of the first switching valve 61 by the pair of support protrusions 62a. With the structure as described above, the first switching valve 61 and the second switching valve 62 are rotatably supported by the common support shaft portion 63 (see FIG. 8).

  The first switching valve 61 is in a state where it is opened with respect to the opening 60c by the support shaft 63, to a position where the opening 60c is closed, that is, a position along the side surface of the rectangular tube body 60 where the opening 60c is formed. It is provided so as to be rotatable within a range. The second switching valve 62 is located outside the first switching valve 61 at a position in the vicinity of the first switching valve 61 in a state in which the opening portion 60c is closed from a state in which the supporting shaft portion 63 opens with respect to the opening portion 60c. It is provided so as to be rotatable within the range up to.

  A communication port 61 c is formed in the first switching valve 61. That is, the first switching valve 61 allows the inside and the outside of the rectangular tube body 60 to communicate with each other through the communication port 61c in a state where the opening 60c is closed. The opening area of the communication port 61c is smaller than the opening area of the opening 60c so that the flow rate of the washing water is reduced by a predetermined amount when the opening 60c is closed by the first switching valve 61 than when the opening 60c is fully opened. Is set. Thus, the 1st switching valve 61 reduces the opening area which connects the inside and outside of the square cylinder 60 in the opening part 60c by closing the opening part 60c.

  In addition, the second switching valve 62 provided outside the first switching valve 61 is provided with an insertion protrusion 62c extending toward the first switching valve 61 side. The insertion protrusion 62 c is a portion that is inserted into the communication port 61 c of the first switching valve 61 by rotating in the closing direction of the second switching valve 62 and approaching the first switching valve 61. The second switching valve 62 inserts the insertion protrusion 62c into the communication port 61c of the first switching valve 61 so that the inside and outside of the rectangular tubular body 60 reduced by closing the first switching valve 61 at the opening 60c. The opening area to be communicated is further reduced.

  The other end (lower end) of the second ball chain 36 is connected to the end of the second switching valve 62 opposite to the rotation support side. As a result, the second switching valve 62 is rotated toward the opening 60c by the second ball chain 36 being pulled up with the swing of the second pulling member 34 due to the rotation of the rotation transmitting member 32. At the same time, the first switching valve 61 is also pushed by the second switching valve 62 and rotates toward the opening 60c. Further, weights 61d and 62d for stabilizing the operation are attached to the first switching valve 61 and the second switching valve 62, respectively.

  As described above, on one side surface of the rectangular tube body 60, the opening 60 c is formed by the two valve bodies of the first switching valve 61 and the second switching valve 62 that are rotatably supported by the support shaft portion 63. A flow rate adjusting mechanism for adjusting the amount of washing water flowing from the outside to the inside of the rectangular tube body 60 by adjusting the communication area inside and outside the rectangular tube body 60 in stages is configured. Specifically, the flow rate adjusting mechanism according to the present embodiment includes a state in which the opening 60c is fully opened, a state in which the opening 60c is closed only by the first switching valve 61, the first switching valve 61 and the second switching valve 62. The communication area in the opening 60c is adjusted in three steps with the opening 60c closed.

  Operation | movement of the washing water tank apparatus 1 of this embodiment provided with the above structures is demonstrated. In the standby state before the flush toilet 2 is washed by the flush water tank device 1, the flush water tank 12 is full (see FIG. 2, position A <b> 1), and the float 50 is the stop piece 44 b of the stop member 44. As a result, the valve element 41 at the lower end of the overflow pipe 42 is pressed downward by the head pressure of the cleaning water in the cleaning water tank 12 (see FIG. 3).

  First, when the flush toilet 2 is started to be washed by the flush water tank apparatus 1, the operation lever 31 is rotated in one direction or the other direction by large washing or small washing by a user or the like. Here, when the operation lever 31 is rotated in the direction corresponding to the large washing, only the first pulling member 33 is swung with the rotation of the rotation transmitting member 32, and the first ball chain 35 is moved. In accordance with this, the overflow pipe 42 to which the lower end of the first ball chain 35 is connected by the stop member 44 is pulled up together with the valve body 41, the drain port 14 is opened, and the washing water is drained from the drain port 14. Be started. Here, as described above, when the first ball chain 35 is pulled up, the stop member 44 first rotates with respect to the overflow pipe 42, and then the overflow pipe 42 is pulled up vertically, so that the overflow occurs. The pipe 42 is prevented from moving vertically upward while rotating, and a stable valve opening operation of the drain valve device 40 is obtained.

  On the other hand, when the operation lever 31 is rotated in the direction corresponding to the small washing, the overflow pipe 42 and the valve body 41 are pulled up by the first ball chain 35 as in the case of the large washing, so that The drainage of the washing water is started, and in addition, the second pulling member 34 is also swung with the rotation of the rotation transmitting member 32, and the second ball chain 36 is pulled up. Thereby, the 2nd switching valve 62 which is an outer valve body provided with respect to the opening part 60c of the square cylinder 60 is pulled, and rotates in the direction which closes the opening part 60c. By the rotation of the second switching valve 62, the first switching valve 61 located inside the second switching valve 62 is also pushed by the second switching valve 62 and rotates. Here, the first switching valve 61 and the second switching valve 62 rotate, for example, to a position where the opening 60c is closed, that is, to a position that is substantially in the vertical direction.

  As the overflow pipe 42 is lifted by the operation of the operation lever 31, the float 50 acting on the overflow pipe 42 by the stopper piece 44b of the stopper member 44 rises by buoyancy as the overflow pipe 42 rises. In other words, the float 50 that has been restricted from being lifted by buoyancy by the stopper piece 44 b of the stopper member 44 rises as the stopper member 44 rises integrally with the overflow pipe 42.

  After the overflow pipe 42 and the like are pulled up by the operation of the operation lever 31, the operation lever 31 returns to the initial position (position in the standby state), and accordingly, the first pulling member 33 and the like also return to the initial position. . Here, in the case of small cleaning, the second pulling member 34 returns to the initial position, and the second switching valve 62 returns to the initial position by its own weight including the weight of the weight 62d. However, the 1st switching valve 61 is hold | maintained in the state which closed the opening part 60c by the difference of the water pressure inside and outside the square cylinder 60. FIG. As a result, the opening area of the communication port 61c of the first switching valve 61 is narrower than the opening area of the opening 60c, so that the opening area that communicates the inside and outside of the rectangular tubular body 60 in the opening 60c is reduced. Accordingly, the flow rate of the cleaning water flowing from the outside to the inside of the rectangular tube body 60 decreases. In this regard, in the case of large cleaning, the first switching valve 61 and the second switching valve 62 remain in their initial positions, so that the opening 60c is maintained in a fully opened state.

  After drainage from the drain port 14 is started with the rise of the overflow pipe 42 and the valve body 41, the level of the wash water in the wash water tank 12 as a whole is discharged with the wash water from the drain port 14. From the time when the water level drops to near the upper edge portion 60a of the rectangular tube 60, the rate of decrease in the water level of the cleaning water in the rectangular tube 60 due to drainage from the drain port 14 is It becomes rapidly faster than the lowering speed of the outside washing water level. This is because the water level of the cleaning water in the cleaning water tank 12 is lower than the upper edge portion 60a of the rectangular tube body 60, and the inflow of the cleaning water into the rectangular tube body 60 communicating with the drain port 14 is This is based on the fact that there is no inflow from the open portion on the upper side of the body 60 and only inflow from the opening 60c.

  In the process of draining from the drain 14 of the cleaning water in the rectangular tube 60, the cleaning water held in the water storage tube 43 flows out from the small holes 43a and 43b into the rectangular tube 60, The level of the cleaning water in the water storage cylinder 43 is lowered at a predetermined speed according to the amount of the cleaning water flowing out from the small holes 43a and 43b. Here, of the two small holes 43a and 43b, as described above, the flow amount of the cleaning water in the water storage cylinder 43 through the small hole is adjusted by opening and closing one small hole 43a that can be opened and closed by the switching member 46. The

  As the water level in the water storage cylinder 43 is lowered, the float 50 is lowered, and the overflow pipe 42 and the valve body 41 are lowered in conjunction with the lowering of the float 50. Here, the descending overflow pipe 42 and the valve body 41 follow the descending of the float 50 while acting on the float 50 via the stop member 44, and descend at the same speed as the descending speed of the float 50.

  Then, after the discharge of the washing water from the drain port 14 continues and a predetermined time elapses, the washing water level in the water storage cylinder 43 is lowered to a position where buoyancy is not given to the float 50 and is lowered integrally with the overflow pipe 42. The drain port 14 is closed by the valve body 41 to be closed, that is, the valve body 41 is closed, and drainage from the drain port 14 ends at a predetermined timing. With regard to the valve closing operation of the valve body 41, it is possible to store water when one of the two small holes 43a and 43b as described above is closed by the switching member 46 than when the small hole 43a is not closed. Since the outflow amount of the washing water from the cylinder 43 is reduced, the timing for closing the valve body 41 is delayed. In other words, when one small hole 43a is closed by the switching member 46, the amount of washing water discharged from the drain port 14 is larger than when both small holes 43a and 43b are open. As described above, the amount of washing water discharged from the drain port 14 is adjusted by switching the opening and closing of the one small hole 43 a by the switching member 46.

  After the valve body 41 is closed and the discharge of the cleaning water from the drain port 14 is completed, the cleaning in the cleaning water tank 12 is performed by supplying water into the cleaning water tank 12 by the cleaning water supply device 20 as described above. The water level returns to the water level when the water is full, and the washing water tank apparatus 1 enters a standby state.

  The operation of the float 50 and the regulating valve 51 in a series of washing water draining operations by the washing water tank apparatus 1 as described above will be described in detail with reference to FIGS. 3, 9, 10, and 11. In FIG. 9, FIG. 10, and FIG. 11, the first switching valve 61 and the second switching valve 62 are omitted. In the drain valve device 40 of the present embodiment, as described above, the restriction portion 52 is provided on the bottom surface 50 a of the float 50, and the adjustment valve 51 is disposed in the restriction portion 52.

  In such a structure, the float 50 overflows before the regulating valve 51 as the overflow pipe 42 is first pulled up by the operation of the operation lever 31 from the standby drain valve device 40 (see FIG. 3). It rises by buoyancy so as to follow the tube 42 (see FIG. 9). This is based on the fact that the specific gravity of the regulating valve 51 is larger than the specific gravity of the float 50 and smaller than the specific gravity of water as described above. Specifically, it is as follows.

  Water flow formed between the float 50 and the inner surface of the water storage cylinder (the inner peripheral surface 47a of the outer cylindrical portion 47 and the outer peripheral surface 48a of the inner cylindrical portion 48) in a state where the float 50 is disposed in the water storage cylinder 43. If the possible flow path 71 is narrow, the replacement of water around the float 50 in the water storage cylinder 43 hardly occurs in the process of draining the washing water from the drain port 14. If the replacement of water around the float 50 is difficult to occur, the float 50 is difficult to rise, and a time lag occurs between the rise of the overflow pipe 42 and the rise of the float 50. In this respect, in the drain valve device 40 of the present embodiment, since the regulating valve 51 rises later than the float 50, the flow path 71 is partially blocked by the regulating valve 51 when the float 50 rises. Therefore, the area of the flow path 71 can be ensured, so that the water replacement around the float 50 is performed smoothly and the float 50 is likely to rise. In the state where the area of the flow path 71 is larger than the case where the flow path 71 is blocked by the adjustment valve 51 without the flow path 71 being blocked by the adjustment valve 51, the float 50 rises quickly at the same time as the overflow pipe 42 is pulled up. The float 50 that has risen before the regulating valve 51 is in a state in which the rise is restricted by the stop member 44 provided in the overflow pipe 42 in the raised state (see FIG. 10).

  After the float 50 starts to rise, the regulating valve 51 rises by buoyancy at a predetermined timing (see FIG. 10). The difference in the rising timing of the regulating valve 51 relative to the float 50 is based on the fact that the specific gravity of the regulating valve 51 is larger than that of the float 50 as described above. The rising adjustment valve 51 first rises and collides with the float 50 in a state where the rise is restricted by the stop member 44, and comes into contact with the float 50 (see FIG. 10). The flow path 71 becomes narrow when the regulating valve 51 comes into contact with the float 50. As described above, the inner edge diameter B1 of the regulating valve 51 is larger than the outer diameter C1 of the inner cylinder portion 48 and smaller than the inner diameter D1 of the float 50, and the outer edge diameter B2 of the regulating valve 51 is smaller than the inner diameter of the float 50. A channel 71b formed between the float 50 and the outer peripheral surface 48a of the inner cylinder part 48 in the channel 71 is formed by being larger than D1 and smaller than the inner diameter C2 of the inner cylinder part 48. This is because it is blocked.

  After the adjustment valve 51 is raised, the float 50 and the adjustment valve 51 are integrally lowered as the water level in the water storage cylinder 43 is lowered, and the overflow pipe 42 and the adjustment valve 51 are interlocked with the lowering of the float 50 and the adjustment valve 51. The valve body 41 descends. Here, the descending overflow pipe 42 and the valve body 41 follow the descending of the float 50 and the regulating valve 51 while acting on the float 50 via the stop member 44, and are the same as the descending speed of these floats 50. It descends at a speed (see FIG. 11).

  Then, after the discharge of the washing water from the drain port 14 continues and a predetermined time elapses, the washing water level in the water storage cylinder 43 is lowered to a position where buoyancy is not given to the float 50 and the regulating valve 51, and the overflow pipe 42 The drain port 14 is closed by the valve body 41 that descends integrally, that is, the valve body 41 is closed, and drainage from the drain port 14 is completed at a predetermined timing (see FIG. 3).

  After the valve body 41 is closed, the adjustment valve 51 is separated from the float 50 when the washing water in the water storage cylinder 43 has escaped from the small holes 43a and 43b. However, since the restriction portion 52 is provided on the bottom surface 50 a of the float 50, the float 50 does not move downward than the restriction portion 52. By supplying water into the cleaning water tank 12 by the cleaning water supply device 20 as described above, the regulating valve 51 comes into contact with the bottom surface 50 a of the float 50.

  According to the drain valve device 40 of the present embodiment as described above, the operation accompanying the discharge of the washing water can be stabilized while avoiding the trouble due to freezing in the gap between the float 50 and the water storage cylinder 43, and it closes quickly. Can be prevented. Such an effect will be specifically described.

  First, according to the drain valve device 40 of the present embodiment, as described above, during the opening of the valve body 41, the regulating valve 51 rises later than the float 50, so that the flow path 71 is relatively wide. Therefore, the replacement of water around the float 50 is performed smoothly, and the float 50 easily rises. The float 50 quickly rises at the same time when the overflow pipe 42 is pulled up, and the rise of the overflow pipe 42 and the rise of the float 50 occur. It is possible to prevent a time lag from occurring. As a result, the behavior of the overflow pipe 42 immediately after being pulled up can be stabilized, and the operation of the overflow pipe 42 and the float 50 can be prevented from varying due to the pulling speed of the overflow pipe 42 by the operation of the operation lever 31.

  That is, if the flow path 71 is narrow, water replacement around the float 50 is not performed smoothly and the float 50 is difficult to rise, and the followability with respect to the overflow pipe 42 is poor, and the rise of the overflow pipe 42 and the rise of the float 50 are There is a time lag between them. As a result, since the water level around the float 50 in the water storage cylinder 43 starts to drop before the float 50 rises to the highest point, the operation of the overflow pipe 42 and the float 50 varies depending on the pulling speed of the overflow pipe 42. In this regard, according to the drain valve device 40 of the present embodiment, the float 50 reliably rises as the overflow pipe 42 rises, so that it is possible to suppress variations in operation due to the pulling speed of the overflow pipe 42. Become.

  As described above, the drain valve device 40 of the present embodiment allows the float 50 to be quickly moved simultaneously with the pulling up of the overflow pipe 42 by taking the flow path 71 relatively wide as the regulating valve 51 rises later than the float 50. The behavior of each part such as the overflow pipe 42 and the float 50 accompanying the drainage of the washing water from the drain port 14 can be stabilized.

  Further, as described above, when the valve element 41 is closed (while the float 50 is descending), the flow path 71 is more than that when the valve element 41 is opened due to the adjustment valve 51 coming into contact with the float 50. Since it becomes narrow, substitution of water around the float 50 is difficult to be performed. As a result, the difficulty in replacing water around the float 50 becomes a resistance when the float 50 is lowered. For this reason, when the float 50 is lowered, the float 50 is less likely to be drawn downward in the water storage cylinder 43, and the valve body 41 descending in conjunction with the float 50 is prevented from being quickly closed by the force of the washing water. Can do.

  That is, when the valve body 41 is closed (while the float 50 is descending), if the flow path 71 is wide, water replacement around the float 50 is excessively performed, the resistance acting on the float 50 is small, and the operation is not performed. It becomes stable. As a result, when the float 50 is lowered, the float 50 is likely to be pulled downward, and a phenomenon of early closing occurs in which the valve body 41 closes earlier than a predetermined timing. In this regard, according to the drain valve device 40 of the present embodiment, the flow path 71 can be made relatively narrow by the adjustment valve 51 coming into contact with the float 50, and the float 50 is stably lowered while receiving resistance. As a result, it is possible to prevent the valve element 41 from closing early due to the float 50 being pulled downward. As a result, the time from when the valve body 41 is opened to when it is closed can be ensured, and the specified amount of washing water can be secured.

  As described above, the drain valve device 40 of the present embodiment has the adjustment valve 51 below the float 50 disposed in the water storage cylinder 43, so that the float 50 has water due to the narrowness of the flow path 71. The resistance caused by the difficulty in replacement is exerted, and a stable operation can be obtained without the downward pull-in of the lowering operation of the float 50. As a result, it is possible to prevent the valve body 41 from being quickly closed by the momentum of the washing water while the valve body 41 is closed.

  As described above, according to the drain valve device 40 of the present embodiment, the float 50 can be quickly raised simultaneously with the overflow pipe 42 while the valve body 41 is open, and the behavior of the overflow pipe 42 immediately after being pulled up, That is, the behavior of the valve body 41 can be stabilized. On the other hand, when the valve body 41 is closed (while the float 50 is being lowered), the float 50 is less likely to be pulled in by the stable lowering operation of the float 50, and early closing can be prevented. That is, the drain valve device 40 of the present embodiment has the adjustment valve 51 below the float 50 disposed in the water storage cylinder 43, so that the float 50 can easily float during the opening of the valve body 41. This makes it possible to achieve both difficulty of being pulled in while the valve body 41 is closed (while the float 50 is being lowered).

  Further, regarding the trouble caused by freezing around the float 50, in the drain valve device 40 of the present embodiment, the overflow pipe 42 and the float 50 are separate and independent from each other. It is fundamental that a malfunction due to freezing occurs such that the rotation transmission member 32 is forcibly pulled up by the operation of the operation lever 31 while the water remaining between the two is frozen and is broken at the water storage tube 43 and the frozen float portion. Not. That is, by adopting a configuration in which the overflow pipe 42 and the float 50 are separate members as in the drain valve device 40 of the present embodiment, a problem due to freezing in the gap between the float 50 and the water storage cylinder 43 is assured. Can be avoided.

Further, in the drain valve device 40 of the present embodiment, the width of the flow path 71 is adjusted by the adjustment valve 51. That is, in the drain valve device 40 of the present embodiment, the inner edge diameter B1 of the regulating valve 51 is larger than the outer diameter C1 of the inner cylinder portion 48 and smaller than the inner diameter D1 of the float 50, and the outer edge diameter B2 of the regulating valve 51 is. Is formed to be smaller than the inner diameter D1 of the float 50 and smaller than the outer diameter D2 of the float 50, so that the flow path 71b is narrowed when the regulating valve 51 contacts the float 50. Configuration is realized. Incidentally, the inner edge diameter B1 of the control valve is larger than the inner diameter D1 of the float 50, and smaller than the inner outer diameter D2 of the float 50, the outer edge diameter B2 of the control valve is larger than the outer diameter D2 of the float 50, and the outer tube The regulating valve may be formed so as to be smaller than the inner diameter C2 of the portion 47. By forming the regulating valve in this way, it is possible to realize a configuration in which the flow path 71a is narrowed when the regulating valve 51 contacts the float 50. In this case, the restricting portion bends in the direction opposite to the axial direction of the float 50 from the lower end of the protruding portion 52a and the protruding portion 52a erected downward from the approximate center of the bottom surface 50a of the float 50. And a bent portion. Thereby, the movement of the regulating valve away from the float can be restricted. Further, the inner edge diameter B1 of the regulating valve is smaller than the inner diameter D1 of the float 50 and larger than the outer diameter C1 of the inner cylinder portion 48, the outer edge diameter B2 of the regulating valve is larger than the outer diameter D2 of the float 50, and The regulating valve may be formed so as to be smaller than the inner diameter C2 of the cylindrical portion 47. By forming the regulating valve in this way, it is possible to realize a configuration in which the flow path 71a and the flow path 71b are narrowed when the regulating valve 51 contacts the float 50.

In the present embodiment, the restricting portions 52 are provided at two locations that are point-symmetric about the axis of the float 50 on the bottom surface 50a of the float 50 (see FIG. 6). Accordingly, the two restricting portions 52 oppose the protruding directions of the bent portions 52b bent in an L shape with respect to the protruding portions 52a.
Further, the inner edge diameter B1 of the regulating valve is larger than the outer diameter C1 of the inner cylinder portion 48 and smaller than the inner diameter D1 of the float 50, the outer edge diameter B2 of the regulating valve is larger than the inner diameter D1 of the float 50, and the outer cylinder. By forming the adjustment valve so as to be smaller than the inner diameter C <b> 2 of the portion 47, a configuration in which the flow path 71 is narrowed when the adjustment valve 51 contacts the float 50 can be realized.

  Further, since the specific gravity of the regulating valve 51 is smaller than that of water and larger than that of the float 50, the regulating valve 51 can be raised with a delay relative to the float 50 when the valve body 41 is raised.

  Thus, the adjustment of the width of the flow path 71 can be realized by the adjustment valve 51. That is, with respect to the water storage cylinder 43 constituted by the control cylinder 45, by adjusting the size and specific gravity of only the adjustment valve 51 without changing the shape, the flow of the valve body 41 is lower than that of the valve body 41 rising. A configuration in which the path 71 is narrow can be realized.

  Therefore, the flow path 71 can be easily adjusted with a relatively simple structure. Moreover, about the structure of the float 50 and the water storage cylinder 43, an existing structure can be utilized.

  Further, since the regulation portion 52 is provided on the bottom surface 50a of the float 50, when the regulating valve 51 rises by buoyancy at a predetermined timing after the float 50 starts to rise, the regulating valve 51 is This prevents the bottom surface 50a from being too far away. As a result, the regulating valve 51 does not collide with the float 50 that has been raised first, and the valve body 41 is prevented from closing while the flow path 71 is not adjusted by the regulating valve 51. During the descent, the adjustment valve 51 can collide with the float 50 at a relatively early stage, so that the operation accompanying the discharge of the washing water can be further stabilized and early closing can be prevented.

  Furthermore, the restricting portion 52 is formed in an L-shaped vertical section by a protruding portion 52a erected downward from the bottom surface 50a of the float 50 and a bent portion 52b bent from the lower end thereof in the axial direction of the float 50. Therefore, it is possible to realize the restriction of the movable range of the adjustment valve 51 with a simple configuration.

DESCRIPTION OF SYMBOLS 1 Washing water tank apparatus 2 Flush toilet bowl 12 Washing water tank 12a Bottom part 14 Drain outlet 40 Drain valve apparatus 41 Valve body 42 Overflow pipe (working rod)
43 Water Reservoir 43a Small Hole 43b Small Hole 50 Float 50a Bottom 51 Adjusting Valve (Adjusting Means)
52 Restriction part 52a Protrusion part 52b Bending part 47 Outer cylinder part 47a Inner peripheral surface (inner side surface of water storage cylinder)
48 inner cylinder part 48a outer peripheral surface (inner side surface of water storage cylinder)
71 flow path

Claims (6)

A drainage valve device provided in a washing water tank for storing washing water supplied to a toilet bowl, having a valve body at the lower end portion for opening and closing a drainage port provided at the bottom of the washing water tank, and moving up and down An operating rod that opens and closes the drainage port by the valve body, a water storage tube that has a small hole through which the operating rod penetrates in the axial direction of the cylinder and allows washing water to flow, and the inside of the water storage tube The float is arranged to be movable up and down, and causes the buoyancy obtained by the wash water in the water storage cylinder to act on the operating rod, and the flowable water flow formed between the float and the inner surface of the water storage cylinder Road,
A drain valve device comprising: adjusting means for narrowing the flow path when the valve body is closed compared to when the valve body is opened.   The drain valve device according to claim 1, wherein the adjusting means is configured by a flat plate-like adjusting valve that can contact and separate from a bottom surface of the float and penetrates the operating rod.   The drain valve device according to claim 2, wherein the specific gravity of the regulating valve is smaller than water and larger than the float. A regulation unit that regulates the movable range of the regulating valve within a certain range from the bottom surface of the float;
The drain valve device according to claim 2 or 3, wherein the regulating valve is movable up and down within the certain range. The restricting portion is formed in a vertical cross-sectional L-shape by a protruding portion erected downward from the bottom surface of the float and a bent portion bent from the lower end in the axial direction of the float,
The drain valve device according to claim 4, wherein the adjustment valve is movable up and down inside the restricting portion.   A washing water tank device comprising the drain valve device according to any one of claims 1 to 5.