JP2014114630A - Toilet bowl flush tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a toilet bowl flush tank for enabling an increase in the water storage capacity while suppressing an increase in the size of a flush toilet bowl.SOLUTION: A toilet bowl flush tank B is provided on a toilet bowl body 60 of a flush toilet bowl A for storing flushing water to be discharged into a toilet bowl part. The toilet bowl flush tank B includes a first tank 10 arranged on the toilet bowl body 60 within its planar-view range, a second tank 20 arranged on the toilet bowl body 60 within its planar-view range at a space from the first tank 10, and a connection pipe 29 which connects the first tank 10 to the second tank 20 in communication therewith, and the internal of which is a predetermined-length communication passage 30 where the flushing water flows.

Description

  The present invention relates to a toilet bowl cleaning tank.

  Patent Document 1 discloses a structure in which a toilet flushing tank for storing flush water discharged to a toilet bowl is accommodated in a flush toilet. The toilet body is formed with an accommodation space opened upward behind the toilet bowl, and the toilet bowl is accommodated so as to drop into the accommodation space. This toilet flushing tank is not exposed to the outside of the toilet body, but is placed so as to be within the range of the toilet body in plan view, so that the outer surface shape of the toilet body is simplified and the appearance is improved. be able to.

JP 2008-240402 A

  Since the toilet bowl cleaning tank of Patent Document 1 is arranged only in the region behind the toilet bowl, in order to increase the water storage capacity, the toilet bowl cleaning tank is enlarged upward or in a plan view of the toilet bowl cleaning tank. It is necessary to enlarge the shape. However, in the former method, the toilet flushing tank protrudes upward from the toilet bowl behind the toilet bowl, and the flush toilet becomes larger in the height direction. In the latter method, the plan view shape of the flush toilet becomes large in the front-rear direction or the left-right direction.

  The present invention has been made in view of the above-described conventional situation, and it is an issue to be solved to provide a toilet flushing tank capable of increasing the water storage capacity while suppressing an increase in the size of the flush toilet. Yes.

The toilet bowl cleaning tank of the present invention is
A toilet cleaning tank provided in the toilet body of a flush toilet, for storing cleaning water discharged to the toilet bowl,
A first tank disposed within a range of the toilet main body in plan view;
A second tank disposed in a space between the first tank and the first tank within a range of the toilet body in plan view;
The first tank and the second tank are connected in a communicating state, and a connecting pipe having a communication path with a predetermined length through which the cleaning water flows is provided.

  Inside the toilet bowl body, the space (dead space) depends on the design conditions such as the height of the toilet seat, the water level of the toilet bowl, the amount of water stored in the sealing part, and the arrangement of the drainage channel connected to the toilet bowl. Exists. It can be considered that this space is effectively used as a part of a storage space for storing the toilet bowl cleaning tank. However, when there is a toilet component inside the toilet body, when the toilet cleaning tank is tried to be assembled in the toilet body, the toilet component gets in the way, and as a result, the space in the toilet body is maximized. There is concern that it will not be possible to make the best use of it.

  In the present invention, the toilet cleaning tank is divided into a first tank and a second tank in order to make effective use of the space in the toilet body in consideration of the presence of the toilet composing portion. It was set as the structure connected with the connection pipe | tube which has the length of. According to this configuration, by arranging the first tank and the second tank so as to sandwich the toilet bowl component, the space in the toilet bowl body can be effectively used as a storage space for the toilet bowl cleaning tank. Further, both the first tank and the second tank are disposed within a range of the toilet body when viewed from above. Therefore, the toilet flushing tank of the present invention can increase the water storage capacity while suppressing an increase in the size of the flush toilet.

The perspective view showing the state which attached the toilet bowl washing tank of Example 1 to the toilet bowl main body. Top view showing the toilet bowl attached to the toilet body Sectional view showing the state where the toilet bowl is attached to the toilet body Cross section of toilet bowl cleaning tank XX sectional view of FIG. The perspective view showing the state which separated the 1st tank and the 2nd tank of the toilet bowl washing tank Sectional view schematically showing the process of storing wash water in the toilet flushing tank Sectional view schematically showing the process of storing wash water in the toilet flushing tank Cross-sectional view schematically showing the state where the wash water has been stored in the toilet bowl A cross-sectional view schematically showing the process of discharging the flush water in the toilet bowl to the toilet bowl side A cross-sectional view schematically showing the process of discharging the flush water in the toilet bowl to the toilet bowl side A cross-sectional view schematically showing the process of discharging the flush water in the toilet bowl to the toilet bowl side Sectional drawing which represented the state which completed the process of discharging the flushing water in the toilet bowl washing tank to the toilet bowl side

The toilet bowl cleaning tank of the present invention is
The first tank and the second tank may be separable in the communication path.
According to this configuration, the first tank and the second tank can be separated as necessary during maintenance or the like, which is convenient.
The toilet bowl cleaning tank of the present invention is
The connecting pipe is
A first connecting pipe provided on the first tank side;
A second connection pipe that is provided on the second tank side and is fitted to the first connection pipe so as to be capable of relative movement in the axial direction may be provided.
According to this configuration, since the first tank and the second tank can be moved relative to each other, even if the toilet body has a dimensional error in the manufacturing process, the first tank and the second tank are individually separated from the toilet body. Can be fixed to.

The toilet bowl cleaning tank of the present invention is
The first tank is arranged in a region above the second tank and behind the toilet bowl,
A functional member may be attached to the first tank.
According to this configuration, since the first tank to which the functional member is attached is disposed in the region above the second tank and behind the toilet bowl, maintenance or the like is performed on the functional member. When doing, it is easy to work.

<Example 1>
A first embodiment embodying the present invention will be described below with reference to FIGS. The toilet bowl cleaning tank B of the first embodiment is provided in the toilet main body 60 of the flush toilet A and stores the wash water W discharged to the toilet bowl 61 of the toilet main body 60. As the washing water W, well water or middle water can be used in addition to tap water. The toilet bowl cleaning tank B realizes an increase in the storage capacity of the cleaning water W while suppressing an increase in the size of the flush toilet A. The toilet bowl cleaning tank B includes a first tank 10, a second tank 20, an electrically driven pump 40, and a water discharge channel 50.

  As shown in FIG. 1, the first tank 10 is made of a synthetic resin material and stores a first water storage case 11 for storing the cleaning water W, and a first dewproof material 12 made of a foamed resin material surrounding the first water storage case 11. It consists of and. Due to the heat insulating function of the first dewproof material 12, dew condensation is prevented when the cleaning water W is stored in the first tank 10. The first tank 10 is formed with an inflow cylinder portion 13 in which a part of the upper wall portion of the first water storage case 11 protrudes upward in a cylindrical shape. The downstream end of the water supply channel 85 shown in FIG. 7 is connected to the inflow cylinder portion 13 so that the cleaning water W flows into the first water storage case 11 (first tank 10) through the water supply channel 85. It has become.

  As shown in FIGS. 4 and 5, the first tank 10 is integrally formed with a first connection pipe 14 in a form in which a part of the bottom wall portion of the first water storage case 11 protrudes downward in a cylindrical shape. Yes. The washing water W in the first tank 10 flows out into the second tank 20 through the first connection pipe 14.

  As shown in FIG. 1, an intake / exhaust portion 15 (functional member described in claims) is provided on the upper surface of the first tank 10. The intake / exhaust unit 15 discharges the air in the first tank 10 and the second tank 20 to the atmosphere when supplying the cleaning water W into the first tank 10. The intake / exhaust section 15 allows air to flow into the first tank 10 from the atmosphere when the wash water W in the first tank 10 and the second tank 20 is discharged to the toilet bowl 61 side. Can do. The intake / exhaust portion 15 smoothly performs the storing operation of the cleaning water W in the toilet bowl cleaning tank B, and smoothly discharges the cleaning water W stored in the toilet bowl cleaning tank B toward the toilet bowl 61 side. Is called.

  A float switch 16 (a functional member recited in claims) is attached to the upper end surface of the first tank 10. The float switch 16 detects whether or not the first tank 10 is full, and the open / close valve 86 provided in the water supply passage 85 opens and closes according to the detection signal. As a result, a predetermined amount of cleaning water W is stored in the first tank 10 and the second tank 20. An overflow pipe 17 is connected between the first tank 10 and the water discharge path 50, and when the water level of the cleaning water W in the first tank 10 exceeds the set height, the overflow water passes through the overflow pipe 17 and the water discharge path 50. It is discharged into a toilet bowl 61 which will be described later.

  As shown in FIG. 4, the second tank 20 is made of a synthetic resin material and stores a second water storage case 21 for storing the cleaning water W, and a pair of upper and lower second protective bodies made of a foamed resin material surrounding the second water storage case 21. It consists of dew material 22. Due to the heat insulating function of the second dewproof material 22, dew condensation is prevented when the wash water W is stored in the second tank 20. Above the second tank 20, the first tank 10 described above is arranged, and both the tanks 10 and 20 are connected via a connecting pipe 29.

  On the upper surface of the second tank 20, when the toilet flush tank B is disposed in a toilet body 60 described later, a recess 23 corresponding to the convex shape of the toilet drain pipe 62 described later is formed. The recessed part 23 is located in the center part in the left-right direction. The second tank 20 has a cutout portion 24 that is open upward and downward in order to avoid interference with a drainage connection pipe 70 described later when the toilet bowl cleaning tank B is disposed in the toilet bowl body 60. ing. The notch 24 is located behind the recess 23 (upper right direction in FIG. 1).

  A portion of the second water storage case 21 that sandwiches the notch 24 from the left and right sides behind the recess 23 is a pair of left and right water storage portions 25L and 25R that protrude in a cantilevered manner to the rear. Both the left and right water storage portions 25L and 25R protrude upward from the peripheral edge portion surrounding the recess 23 in the second water storage case 21. The left and right water storage portions 25L and 25R are arranged so as to sandwich the drainage connection pipe 70 from both the left and right sides when the toilet flushing tank B is arranged in the toilet body 60.

  From the upper end surface of the water storage part 25R on the right side (the back side in FIG. 1) of the second tank 20, the upper end part of the water absorption connecting cylinder part 26 accommodated in the water storage part 25R protrudes upward. Similarly, one end of the communication pipe 27 is connected to the upper end surface of the right water reservoir 25R in a communication state. The other end of the communication pipe 27 is connected to the front surface of the first tank 10 in a communication state. When the wash water W is stored in the second tank 20, if the water level in the second tank 20 rises, air collects at the upper end of the right water storage section 25 </ b> R of the second tank 20. Through the first tank 10. As a result, the wash water W can be stored in a full state in the water reservoir 25R on the right side of the second tank 20 without causing an air reservoir in the upper part.

  The left reservoir 25L is integrally formed with a second connecting pipe 28 that protrudes upward from the upper surface thereof. As shown in FIGS. 4 and 5, the first connection pipe 14 of the first tank 10 is fitted in the second connection pipe 28 in an airtight manner. Further, the first connection pipe 14 and the second connection pipe 28 can be relatively moved in the vertical direction. 4 shows a state in which the first tank 10 is most separated from the second tank 20 in the vertical direction, and FIG. 5 shows a state in which the first tank 10 is closest to the second tank 20 in the vertical direction. The 1st connecting pipe 14 and the 2nd connecting pipe 28 are the connection which connects the 1st tank 10 (1st water storage case 11) and the 2nd tank 20 (2nd water storage case 21) so that separation is possible in the upper and lower sides. A tube 29 is constructed.

  The inside of the connecting pipe 29 is a communication passage 30 having a predetermined length for allowing the cleaning water W to flow between the first tank 10 and the second tank 20. The cross-sectional area when the communication path 30 is cut horizontally is smaller than the cross-sectional area when the first tank 10 and the second tank 20 are cut horizontally. The communication passage 30 includes a first tank 10 and a second tank along the flow path of the cleaning water W when the cleaning water W supplied to the toilet bowl cleaning tank B through the water supply channel 85 is discharged to the toilet bowl 61 side. 20 is connected in series, and functions as a cleaning channel for flowing the cleaning water W along the serial connection path. The communication passage 30 enables air to flow between the first water storage case 11 of the first tank 10 and the second water storage case 21 of the second tank 20.

  As shown in FIGS. 4 and 5, a vent pipe 31 is accommodated inside the toilet bowl cleaning tank B. The ventilation pipe 31 is fixed to the inner surface of the first water storage case 11 by attachment means (not shown). The fixed vent pipe 31 has its axis oriented in the vertical direction, that is, parallel to the connecting pipe 29 (communication path 30). The lower end portion of the vent pipe 31 is accommodated in the communication path 30, and the area above the communication path 30 in the vent pipe 31 is accommodated in the first tank 10.

  The inside of the ventilation pipe 31 is a ventilation path 32 that is open at both the upper and lower ends to allow air to flow. As shown in FIG. 9, the upper end of the ventilation pipe 31 (ventilation path 32) opens upward in the first water storage case 11 at a position higher than the water level at the time of maximum storage of the first tank 10. The lower end of the ventilation pipe 31 opens downward toward the inside of the second water storage case 21 at a position higher than the lower end of the communication path 30 (second connection pipe 28) in the communication path 30. Therefore, the opening at the lower end of the vent pipe 31 is open so as to communicate with the inside of the second tank 20 at a position higher than the water level at the time of maximum water storage of the second water storage case 21.

  As shown in FIG. 1, the pump 40 is disposed above the water reservoir 25 </ b> R on the right side of the second tank 20. As shown in FIG. 5, a water absorption pipe 41 extends downward from the lower surface of the pump 40, and the water absorption pipe 41 is fitted in an airtight manner to the upper end portion of the water absorption connecting cylinder portion 26. The water absorption connecting tube portion 26 communicates with the water absorption port 42 opened in the second tank 20 and protrudes upward. The upstream end of the water discharge channel 50 is connected to a discharge port (not shown) provided on the outer surface of the pump 40.

  As shown in FIGS. 1 and 2, the water discharge channel 50 includes a first water discharge pipe 51 whose upstream end is connected to the discharge port of the pump 40, a joint 52 connected to the downstream end of the first water discharge pipe 51, and A pair of left and right branch pipes 53 connected to the downstream end of the joint 52 branched into two branches. Water discharge ports 54 are opened at the distal end portion (downstream end portion) of the branch pipe 53, respectively.

  As shown in FIG. 3, the flush toilet A including the toilet cleaning tank B includes a toilet body 60, a drain connection pipe 70, and a toilet seat device 82 in addition to the toilet cleaning tank B. The toilet seat device 82 includes a toilet seat device main body 83 placed on the upper surface of the toilet main body 60, and a toilet seat and a toilet lid 84 pivotally supported on the front portion of the toilet seat device main body 83. In the toilet seat apparatus main body 83, the upper end part of the 1st tank 10 which protrudes upwards rather than the toilet bowl main body 60 among the toilet bowl washing tank B is accommodated.

  The toilet body 60 is made of ceramics, and includes a toilet bowl 61, a toilet drain pipe 62 communicating with the downstream side of the toilet bowl 61, and a peripheral wall 63 that surrounds the toilet bowl 61 over the entire circumference. Are integrally formed. The toilet bowl 61 has a rim water passage 64 formed on the periphery of the upper end. Further, the toilet bowl 61 has an outlet 66 that is below the sealing surface 65 and opens in the vertical direction.

  The toilet drain pipe portion 62 is formed continuously with the outlet 66, and is formed continuously with the first descending channel 67 that descends obliquely toward the rear, and downstream of the first descending channel 67, It has an ascending flow path 68 that rises obliquely toward the rear, and a second descending flow path 69 that is continuously formed on the downstream side of the ascending flow path 68 and descends. The second descending flow path 69 has a downstream end extending vertically downward. The upper end of the drain connection pipe 70 is connected to the lower end of the second descending flow path 69. The lower end of the drainage connection pipe 70 is connected to a drainage pipe 71 drawn out to the floor surface F. The toilet drainage pipe 62, the drainage connection pipe 70, and the drainage pipe 71 constitute a drainage channel 72 for discharging the stored water in the toilet bowl 61, the washing water W discharged to the toilet bowl 61 and the filth. .

  The toilet body 60 forms a sealed portion 73 by a portion below the sealed surface 65 of the toilet bowl 61, the first descending flow path 67, and the rising flow path 68. A heat insulating material 74 having a shape along the first descending flow path 67 and the ascending flow path 68 of the toilet drainage pipe section 62 is attached to the toilet body 60 so as to cover the lower portion of the water sealing section 73. Thereby, it is possible to prevent dew condensation from occurring on the outer surface of the sealing portion 73.

  The toilet body 60 has a peripheral wall 63 extending downward from the outer peripheral edge of the upper surface. The peripheral wall 63 extends downward without spreading outward from the outer peripheral edge of the upper surface of the toilet body 60, and the lower end of the peripheral wall 63 is in contact with the floor surface F over the entire periphery. A reinforcing wall 75 is integrally formed in the toilet body 60 in a form in which a region in front of the lower end of the lower surface of the toilet bowl 61 is connected to a front end side region in the left and right side walls of the peripheral wall 63. Has been.

  Further, as shown in FIG. 5, a support wall portion 76 configured to connect the outer surface of the second descending flow path 69 of the toilet drainage pipe portion 62 and the inner surface of the peripheral wall portion 63 is integrally formed in the toilet body 60. Is formed. The support wall portion 76 is generally horizontal as a whole, and specifically has a gentle slope that gradually increases from the peripheral wall portion 63 toward the second descending flow path 69. The support wall 76 is formed to prevent the second descending flow path 69 projecting in a cantilever form from the toilet bowl 61 from being deformed downward by its own weight in the molding process of the toilet body 60. It is. The support wall portion 76 is formed with a pair of left and right through holes 77 disposed so as to sandwich the second descending flow path 69. The water absorption pipe 41 and the connection pipe 29 of the pump 40 are passed through the through hole 77.

  A region behind the toilet bowl 61 in the internal space of the toilet body 60 is a rear space 78. The rear space 78 has a configuration in which the left and right sides and the rear side are partitioned by the peripheral wall portion 63 and open upward and downward. In the rear space 78, the support wall 76 described above, the second descending flow path 69 and the drainage connection pipe 70 that constitute the drainage path 72, and the drainage pipe 71 exist. Since the rear space 78 is a space formed inside the toilet body 60, the rear space 78 is within the range of the formation area of the toilet body 60 in a plan view.

  Of the internal space of the toilet body 60, a region below the toilet bowl 61, the first descending channel 67, the ascending channel 68 and the heat insulating material 74 and behind the reinforcing wall 75 is a space 79. . In the space 79 below the toilet bowl 61, the left and right sides are partitioned by the peripheral wall 63, the front side is partitioned by the reinforcing wall 75, and is opened downward. The space 79 exists below the toilet bowl 61 because of the proper height of the toilet seat, the appropriate water level in the toilet bowl 61, the amount of water stored in the sealing part 73, and the like. This is because 61 is designed. Like the rear space 78, the space 79 is also a space formed inside the toilet main body 60, and thus is within the range of the formation area of the toilet main body 60 in plan view. The space 79 and the rear space 78 are arranged in a line in the front-rear direction and communicate with each other to form a storage space 80 for storing the toilet bowl washing tank B.

  Most of the toilet bowl cleaning tank B excluding the upper end of the first tank 10 is housed in the housing space 80. Specifically, a portion of the second tank 20 where the recess 23 is formed is accommodated in a space 79 below the toilet bowl 61. The concave portion 23 is formed in a concave shape so as to follow the convex shape of the heat insulating material 74 disposed along the first descending flow path 67 and the ascending flow path 68 of the toilet drainage pipe section 62. Thereby, since the part in which the recessed part 23 is formed among the 2nd tanks 20 is arrange | positioned so that it may not interfere with the heat insulating material 74, in order for the space 79 below the toilet bowl part 61 to accommodate the 2nd tank 20 It is effectively used as a space.

  The left and right water reservoirs 25L, 25R behind the recess 23 in the second tank 20 are accommodated in a region below the support wall 76 in the rear space 78, and the drainage channel 72 (drainage connection pipe 70). It is arranged on both the left and right sides. That is, the rear end portion of the second tank 20 is formed so as not to interfere with the drainage channel 72 because the cutout portion 24 is formed. The second tank 20 accommodated in the accommodating space 80 is fixed to the inner surface of the toilet body 60 by bolting via a fixing member 81 provided at the front end and a fixing member (not shown) provided at the rear end. The

  In the state where the second tank 20 of the toilet body 60 is fixed, as shown in FIG. 5, the upper end surface of the left water storage portion 25L faces the support wall portion 76 from below, and the second connection pipe 28 is located on the left side. Is accommodated in the through-hole 77 and opens upward. The upper end surface of the right water storage portion 25R faces the support wall portion 76 from below, and the water absorption connecting cylinder portion 26 protruding from the upper end surface of the right water storage portion 25R is accommodated in the right through hole 77. Opened upwards.

  After the second tank 20 is accommodated in the toilet body 60 and fixed, the first tank 10 and the pump 40 are attached. The first tank 10 is assembled to the second tank 20 from above the support wall 76 so that the first connection pipe 14 is fitted to the second connection pipe 28 of the second tank 20. The communication pipe 27 is connected to the right water storage section 25 </ b> R and the first tank 10 through the right through hole 77. Furthermore, the pump 40 is assembled to the second tank 20 so that the water absorption pipe 41 is fitted into the water absorption connecting cylinder portion 26 from above the support wall portion 76.

  The water discharge channel 50 is connected to the pump 40 and the overflow pipe 17. The water outlet 54 of the water discharge channel 50 is disposed so as to face the rim water channel 64 of the toilet bowl 61. Wash water W stored in the first tank 10 and the second tank 20 is sucked up by the pump 40 from the second tank 20, and discharged into the toilet bowl 61 through the water discharge path 50. Thereby, the filth in the toilet bowl 61 is discharged, and the inside of the toilet bowl 61 is washed.

  The toilet bowl cleaning tank B according to the first embodiment is vertically arranged between the first tank 10 disposed in the plan view of the toilet body 60 and the first tank 10 in the plan view of the toilet body 60. The second tank 20 arranged at an interval, and the two tanks 10 and 20 are connected to each other in a connected state so as to be separable, and a connecting pipe having a communication passage 30 of a predetermined length through which the cleaning water W flows. 29. The technical significance of this configuration is as follows.

  In the toilet body 60, depending on design conditions such as the height of the toilet seat, the water level of the toilet bowl 61, the amount of water stored in the sealing section 73, and the arrangement of the drainage path 72 connected to the toilet bowl 61, A space 79 exists as a dead space. It can be considered that the space 79 below the toilet bowl 61 is effectively used as a part of the storage space 80 for storing the toilet bowl washing tank B. However, since the toilet body 60 has the drainage channel 72 and the support wall portion 76 that supports the second descending flow path 69 constituting the drainage channel 72, the toilet flushing tank B is placed in the toilet body 60. When trying to assemble, the drainage channel 72 and the support wall portion 76 become an obstacle, and as a result, there is a concern that the space 79 cannot be fully utilized.

  Therefore, in the first embodiment, in order to effectively use the space 79 in consideration of the existence of the drainage channel 72 and the support wall portion 76, the toilet tank cleaning tank B can be separated into a first tank 10 and a second tank that can be separated vertically. The tanks 10 and 20 are connected to each other by a connecting pipe 29 having a predetermined length. Then, by arranging the first tank 10 and the second tank 20 separately so as to sandwich the support wall portion 76, the storage space 80 including the space 79 is effectively utilized as the storage space of the toilet bowl cleaning tank B. Realized to do. Further, both the first tank 10 and the second tank 20 are disposed within the range of the toilet body 60 in a plan view. Therefore, the toilet flushing tank B according to the first embodiment can increase the water storage capacity while suppressing an increase in the size of the flush toilet A.

  The toilet flushing tank B according to the first embodiment includes a first connecting pipe 14 provided on the first tank 10 side and constituting the connecting pipe 29, and a connecting pipe 29 provided on the second tank 20 side. The second connecting pipe 28 is fitted to the first connecting pipe 14 so as to be capable of relative movement in the axial direction (vertical direction). According to this configuration, since the first tank 10 and the second tank 20 can be relatively moved in the vertical direction, even if the toilet body 60 has a dimensional error in the manufacturing process, the first tank 10 and the second tank. 20 can be individually fixed to the toilet body 60.

  Further, in the toilet bowl cleaning tank B of the first embodiment, the first tank 10 is disposed in a region above the second tank 20 and behind the toilet bowl 61, and the first tank 10 has a functional member ( An intake / exhaust section 15 and a float switch 16) are attached. When the first tank 10 to which the functional member is attached is arranged in the region above the second tank 20 and behind the toilet bowl 61, when performing maintenance etc. on the functional member, It is easier to work.

  Further, the toilet bowl cleaning tank B of the first embodiment is divided into two upper and lower tanks 10 and 20, the first tank 10 is connected to the water supply channel 85 of the cleaning water W, and the second tank 20 is connected to the toilet bowl 61. The tank 10 and 20 are connected in series via the communication path 30 and the cleaning water W in the first tank 10 is cleaned in the second tank 20. It flows out to the toilet bowl 61 side together with the water W. As described above, in the structure in which the two tanks 10 and 20 are connected in series, there is a concern about the generation of noise due to the movement of air between the tanks 10 and 20.

  There are the following forms of abnormal noise. In the first embodiment, the flow rate per unit time (hereinafter simply referred to as “flow rate”) when the wash water W in the first tank 10 flows out to the second tank 20 through the communication path 30 is the first tank. This is less than the flow rate at which the washing water W flows into 10. Therefore, in the process of storing the wash water W in the toilet bowl cleaning tank B after the water discharge to the toilet bowl 61 is completed, the communication passage 30 is sealed by the wash water W flowing out from the first tank 10 to the second tank 20. It stops, and it will be in the state where the air in the 2nd tank 20 was confined. Therefore, as the water level in the second tank 20 rises, the air trapped in the second tank 20 rises toward the first tank 10 in the communication passage 30 against the flow of the wash water W, At this time, there is a possibility that an abnormal noise is generated.

  Therefore, the toilet bowl cleaning tank B of the first embodiment is connected to the first tank 10 connected to the water supply path 85 of the cleaning water W and the water discharge path 50 that discharges the cleaning water W toward the toilet bowl 61. The second tank 20, the communication passage 30 that connects both the tanks 10, 20 in series, and one end (upper end) opens to a position higher than the water level at the time of maximum storage in the first tank 10, and the other end A portion (lower end) is provided with an air passage 32 that opens so as to communicate with the second tank 20. According to this structure, generation | occurrence | production of the noise at the time of supplying the washing water W to the toilet bowl washing tank B can be prevented by the effect | action described below.

  In the process of supplying the cleaning water W into the toilet bowl cleaning tank B, the cleaning water flow rate of the cleaning water W to the first tank 10 passes through the communication path 30 and flows out from the first tank 10 to the second tank 20. More than the flow rate of W. Therefore, as shown in FIG. 7, the region other than the vent pipe 31 in the communication passage 30 (the flow region of the cleaning water W in the communication passage 30) is caused by the cleaning water W flowing into the second tank 20 from the first tank 10. It becomes a blocked state. However, even if the water level in the second tank 20 rises in this state, the air in the second tank 20 is discharged to the upper end portion of the first tank 10 through the air passage 32. Further, the air in the first tank 10 passes through the intake / exhaust section 15 and is discharged to the atmosphere (outside the first tank 10).

  As a result, as shown in FIG. 8, even if the water level in the second tank 20 rises, the air in the second tank 20 does not become trapped but is maintained at atmospheric pressure. Therefore, the air in the second tank 20 does not move toward the first tank 10 against the flow of the cleaning water W in the region other than the vent pipe 31 in the communication passage 30. Thereby, generation | occurrence | production of the noise resulting from the air in the 2nd tank 20 moving to the 1st tank 10 side through the communicating path 30 is prevented. The prevention of this abnormal noise continues until both the first tank 10 and the second tank 20 are full as shown in FIG.

  Further, when the two tanks 10 and 20 are connected in series, the following forms may be generated as abnormal noise caused by the movement of air between the tanks 10 and 20. The washing water W is an incompressible fluid, and the cross-sectional area of the communication passage 30 is smaller than the cross-sectional area of the water inlet 42 of the pump 40 that opens into the second tank 20. When the stored wash water W flows to the toilet bowl 61 side, the flow rate of the wash water W passing through the communication path 30 is faster than the flow rate of the wash water W flowing out of the second tank 20. Become. Therefore, when the flow rate of the wash water W flowing out from both tanks 10 and 20 to the toilet bowl 61 side for toilet bowl cleaning is a large flow rate, the first flow rate of the wash water W in the communication passage 30 causes the first flow. The water surface of the tank 10 falls locally in the vicinity of the communication path 30. Then, the air in the first tank 10 is drawn into the communication path 30 together with the cleaning water W in the first tank 10, and at this time, there is a concern that an abnormal noise may be generated.

  As a countermeasure, the above-described air passage 30 is effective. When the washing water W is discharged from the state where the washing water W is stored in the toilet bowl washing tank B as shown in FIG. 9 to the toilet bowl 61, it is shown in FIG. As described above, the water level of the cleaning water W in the air passage 32 communicating with the second tank 20 is lower than the water level of the first tank 10, and as shown in FIG. The air is drawn into the second tank 20 through the air passage 32. Since the inside of the first tank 10 communicates with the atmosphere via the intake / exhaust portion 15, the pressure of the air drawn into the second tank 20 is also maintained at atmospheric pressure.

  Therefore, in the process in which the water discharged from the cleaning water W advances from the state shown in FIG. 11 and the water level of the second tank 20 decreases, the air in the first tank 10 passes through the ventilation passage 30 and passes through the second air passage 30 as shown in FIG. Since it flows into the tank 20, the flow rate of the cleaning water W in the communication path 30 does not have to be high even if the amount of the cleaning water W in the second tank 20 is large per unit time. Thereby, there is no possibility that the air in the first tank 10 is drawn into the communication path 30 by the momentum of the washing water W flowing out in the communication path 30. Therefore, the generation of noise due to the air in the first tank 10 being drawn into the communication path 30 is prevented.

  In the toilet bowl cleaning tank B of the first embodiment, the first tank 10 is disposed above the second tank 20, and the communication path 30 is opened on the bottom surface of the first tank 10. According to this configuration, since all of the wash water W stored in the first tank 10 is discharged to the toilet bowl 61 side via the second tank 20, a high washing effect can be expected. .

  Further, in the toilet bowl cleaning tank B of the first embodiment, the lower end portion (at least part) of the air passage 32 is accommodated in the communication passage 30. According to this configuration, the sealing structure for the air passage 32 that is required when the air passage 32 is disposed outside the communication passage 30 and the tanks 10 and 20 are communicated with each other is not necessary. Therefore, the number of parts can be reduced, and the structure can be simplified.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the first embodiment, the toilet bowl cleaning tank is configured by connecting two tanks, the first tank and the second tank, but the toilet bowl cleaning tank is configured by connecting three or more tanks. May be.
(2) In the first embodiment, the toilet bowl cleaning tank is configured such that the first tank and the second tank are arranged one above the other. However, in the toilet bowl cleaning tank, the first tank and the second tank are in the horizontal direction (for example, You may arrange | position with the positional relationship which is located in a line with front and back, and right and left.
(3) In the first embodiment, the two connecting pipes constituting the connecting pipe are formed integrally with the first tank or the second tank. However, at least one of the two connecting pipes is the first connecting pipe. It may be a separate component from the one tank or the second tank.
(4) In the first embodiment, the first connecting pipe and the second connecting pipe constituting the connecting pipe are fitted so as to be relatively movable in the axial direction. However, the first connecting pipe and the second connecting pipe are They may be fitted so that they cannot move relative to each other.
(5) In the first embodiment, the first tank and the second tank are separable in the communication path. However, even if the first tank and the second tank cannot be separated after being connected once. Good.

A ... Flush toilet B ... Toilet wash tank W ... Wash water 10 ... First tank 14 ... First connecting pipe 15 ... Intake / exhaust part (functional member)
16. Float switch (functional member)
DESCRIPTION OF SYMBOLS 20 ... 2nd tank 28 ... 2nd connection pipe 29 ... Connection pipe 30 ... Communication path 60 ... Toilet body 61 ... Toilet bowl part

Claims (4)

A toilet cleaning tank provided in the toilet body of a flush toilet, for storing cleaning water discharged to the toilet bowl,
A first tank disposed within a range of the toilet main body in plan view;
A second tank disposed in a space between the first tank and the first tank within a range of the toilet body in plan view;
A toilet cleaning tank comprising: a connecting pipe that connects the first tank and the second tank in a communicating state, and has a connecting pipe having a predetermined length through which the cleaning water flows. .   The toilet bowl cleaning tank according to claim 1, wherein the first tank and the second tank are separable in the communication path. The connecting pipe is
A first connecting pipe provided on the first tank side;
The second connecting pipe, which is provided on the second tank side and is fitted to the first connecting pipe so as to be capable of relative movement in the axial direction. The toilet cleaning tank according to claim 2. The first tank is arranged in a region above the second tank and behind the toilet bowl,
The toilet bowl washing tank according to any one of claims 1 to 3, wherein a functional member is attached to the first tank.

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