WO2012114585A1

WO2012114585A1 - Toilet flush tank

Info

Publication number: WO2012114585A1
Application number: PCT/JP2011/075609
Authority: WO
Inventors: 慎介谷口
Original assignee: 株式会社Ｌｉｘｉｌ
Priority date: 2011-02-25
Filing date: 2011-11-07
Publication date: 2012-08-30
Also published as: JP2012177257A; TW201237237A; JP5868009B2

Abstract

Provided is a toilet flush tank which can be easily manufactured and which is configured so that water is reliably prevented from leaking. A toilet flush tank is provided with: an inner tank (10) for storing flush water supplied to the toilet body (1) of a water flush toilet; an outer tank (20) for housing the inner tank (10); and an affixation member (30) for affixing the inner tank (10) to the outer tank (20). The inner tank (10) has a water discharge section (11) utilized to affix the inner tank (10) to the outer tank (20). The outer tank (20) has an affixation hole (23) penetrating through the bottom of the outer tank (20) and utilized to affix the inner tank (10) to the outer tank (20), and the outer tank (20) also has, beside the affixation hole (23), through-holes (21, 22) penetrating through the bottom. The toilet flush tank is also provided with packing (51, 52) which are water-tightly gripped between the upper surface of the peripheral edge of the upper openings of the through-holes (21, 22) and the lower surface of the bottom of the inner tank (10) by affixing the inner tank (10) to the outer tank (20) by the affixation member (30) utilizing the affixation hole (23) and the water discharge section (11).

Description

Toilet bowl cleaning tank

The present invention relates to a toilet bowl cleaning tank.

Patent Document 1 discloses a conventional toilet bowl cleaning tank. This toilet bowl cleaning tank is attached to the toilet body of a flush toilet bowl. The toilet bowl cleaning tank includes an inner tank that stores cleaning water supplied to the toilet bowl body, and an outer tank that stores the inner tank. The inner tank has a cylindrical drainage portion that extends downward from the bottom and has an open lower end. The outer tank has a fixing hole penetrating the bottom. The fixing hole is used for fixing the inner tank through the drainage portion of the inner tank. Further, the outer tank has a through hole penetrating the bottom portion separately from the fixed hole. The through hole is inserted through a water supply pipe for supplying cleaning water to the inner tank. Further, the outer tank forms a dam portion protruding upward at the peripheral edge of the upper end opening of the through hole.

In this toilet cleaning tank, when condensed water is generated on the outer surface of the inner tank, the condensed water is transmitted to the outer surface of the inner tank and flows down to the upper surface of the bottom of the outer tank. Condensed water that has flowed down to the upper surface of the bottom of the outer tank is blocked by a dam portion protruding upward at the peripheral edge of the upper end opening of the through hole, and does not flow out of the outer tank from the through hole. For this reason, this toilet bowl washing tank can prevent the leakage of condensed water.

JP 2005-207049 A

However, in the toilet bowl cleaning tank of Patent Document 1, when the flow rate is such that the water leakage generated in the outer tank gets over the weir, the water flows out of the outer tank from the through hole. In addition, when manufacturing the outer tank with pottery, the thickness of the bottom of the outer tank is partially increased at the portion where the dam portion is formed, so that the productivity may be deteriorated, such as cracking due to shrinkage deformation during manufacturing. There is. In addition, there is a risk that the manufacturing cost may be increased, for example, by changing the raw material in order to make it difficult to generate cracks due to shrinkage deformation during manufacturing.

The present invention has been made in view of the above-described conventional situation, and it is an object to be solved to provide a toilet cleaning tank that has good manufacturability and can reliably prevent water leakage.

The toilet flushing tank of the present invention comprises an inner tank for storing flush water supplied to a toilet body of a flush toilet, an outer tank for housing the inner tank, and a fixing member for fixing the inner tank to the outer tank. A toilet cleaning tank provided,
The inner tank has a fixing portion used for fixing to the outer tank,
The outer tank has a fixing hole that penetrates the bottom and is used for fixing the inner tank, and a through hole that penetrates the bottom separately from the fixing hole.
By fixing the inner tank to the outer tank by the fixing member using the fixing hole and the fixing portion, between the upper surface of the peripheral edge of the upper end opening of the through hole and the lower surface of the bottom portion of the inner tank. A water-stopping member that is sandwiched in a watertight manner is provided.

This toilet flushing tank holds the water-stopping member in a watertight manner between the upper surface of the peripheral edge of the upper end opening of the through hole and the lower surface of the bottom of the inner tank, so that it is ensured that water flows out from the through hole to the outside. Can be prevented. Further, by fixing the inner tank to the outer tank, the water stop member can be sandwiched between the upper surface of the peripheral edge of the upper end opening of the through hole and the lower surface of the bottom of the inner tank in a watertight manner. For this reason, the effort which attaches only a water stop member is not required. Furthermore, since it is not necessary to increase the thickness around the through-hole, even when the outer tank is manufactured with earthenware, cracks due to shrinkage deformation during manufacturing can be suppressed, and the yield can be improved. The same raw material as that of a normal toilet bowl can be used.

Therefore, the toilet bowl cleaning tank of the present invention is highly manufacturable and can reliably prevent water leakage.

It is front sectional drawing which shows the toilet bowl washing tank of Example 1. FIG. It is principal part sectional drawing which shows the toilet bowl washing tank of Example 1. FIG. FIG. 3 is a perspective view illustrating a tank body according to the first embodiment. It is a principal part perspective view which shows the cut-off side part of the tank main body of Example 1. FIG. It is a principal part perspective view which shows the state which cut off the cut side surface part of the tank main body of Example 1. FIG. It is a top sectional view showing the toilet bowl washing tank of Example 1. It is a left side sectional view showing the toilet bowl washing tank of Example 1. It is right side sectional drawing which shows the toilet bowl washing tank of Example 1. FIG. It is a perspective view which shows the dewproof material of Example 1. FIG. It is front sectional drawing which shows the toilet bowl washing tank of Example 2. FIG.

A preferred embodiment of the present invention will be described.

The through hole of the present invention can be inserted through a water supply pipe for supplying cleaning water to the inner tank. In this case, the water supply pipe is exposed from the bottom of the outer tank without the water supply pipe being exposed from the top of the outer tank. For this reason, while being able to set it as the toilet bowl washing | cleaning tank which had the clean external appearance, the water leak from a toilet bowl washing tank can be prevented reliably.

The toilet bowl cleaning tank of the present invention includes an intake device housed in the outer tank, and the through hole can be inserted through an intake pipe that communicates the intake device and a toilet drainage channel provided in the toilet body. . In this case, the intake pipe is exposed from the bottom of the outer tank without exposing the intake pipe from the top of the outer tank. For this reason, while being able to set it as the toilet bowl washing | cleaning tank which had the clean external appearance, the water leak from a toilet bowl washing tank can be prevented reliably. Moreover, when the air suction device sucks air in the toilet drainage channel, a siphon action can be generated in the toilet drainage channel, and toilet flushing can be performed satisfactorily with a small amount of washing water.

The inner tank may have an insertion hole communicating with the through hole and penetrating in the vertical direction. In this case, when the water supply pipe or the intake pipe is inserted into the through hole, the insertion hole can be easily inserted by guiding the water supply pipe or the intake pipe to the through hole.

The inner tank may have a water passage that has a lower surface of the bottom portion recessed upward and communicates with a gap between an inner peripheral surface of the fixing hole and an outer peripheral surface of the fixing portion. In this case, drain the condensed water or water leaked to the top surface of the bottom of the outer tank from the gap between the inner peripheral surface of the fixed hole and the outer peripheral surface of the fixed portion to the toilet bowl of the toilet body, etc. Can do.

The inner tank may have a convex portion that protrudes downward from the bottom surface of the bottom portion and positions the water stop member. In this case, the water stop member can be arranged at a predetermined position on the lower surface of the bottom of the inner tank so as to align with the convex portion, and is fixed to the upper surface of the peripheral edge of the upper end opening of the through hole when the inner tank is fixed to the outer tank. A water member can be made to contact reliably. For this reason, the water stop member can be sandwiched between the upper surface of the peripheral edge of the upper end opening of the through hole and the lower surface of the bottom of the inner tank in a watertight manner. Therefore, it is possible to reliably prevent water from flowing out from the through hole.

The inner tank may be composed of a tank body and a dewproof material covering the outer peripheral surface of the tank body. In this case, it is possible to prevent dew condensation water from being generated on the outer surface of the inner tank.

Next, Examples 1 and 2 embodying the toilet bowl cleaning tank of the present invention will be described with reference to the drawings.

<Example 1>
As shown in FIGS. 1 to 9, the toilet bowl cleaning tank of Example 1 includes an inner tank 10 made of resin, an outer tank 20 made of earthenware, a fastening nut 30 that is a fixing member, and a packing 51 that is a water stopping member. 52. This toilet bowl washing tank can be mounted on the rear upper surface of the toilet body 1 of the flush toilet bowl. Moreover, this toilet bowl washing tank is provided with the lid member 40 which has the water discharge tool 41 and has a hand-washing bowl which covers the upper end opening of the outer tank 20.

The inner tank 10 is composed of a tank body 10A and a dew-proof material 10B made of expanded polystyrene that covers the outer peripheral surfaces of the side surface and the bottom surface of the tank body 10A. The inner peripheral surface of the dewproof material 10B has a shape along the outer peripheral surface of the tank body 10A except for a part. For this reason, the tank body 10A and the dew proof material 10B can be integrated by inserting the tank body 10A into the dew proof material 10B from the upper end opening of the dew proof material 10B. In the state where the tank body 10A is inserted and integrated, the dewproof material 10B is positioned at a height substantially equal to the highest water level of the cleaning water stored in the tank body 10A. For this reason, it is possible to prevent dew condensation water from being generated on the outer surface of the inner tank 10.

As shown in FIGS. 1 and 2, the tank body 10A has a substantially cylindrical drainage portion 11 that extends downward and opens at the center of the bottom portion. The drainage part 11 forms a screw thread at the lower part of the outer peripheral surface, and also functions as a fixing part that fixes the inner tank 10 to the outer tank 20. The drainage part 11 extends below the lower surface of the dewproof material 10B in a state where the tank body 10A and the dewproof material 10B are integrated. Further, when the inner tank 10 is fixed to the outer tank 20, the drainage part 11 is formed so as to protrude downward from the lower surface of the bottom of the outer tank 20.

10 A of tank main bodies have accommodated the valve seat member 61 in the drainage part 11. FIG. The valve seat member 61 forms a cylindrical flow path penetrating in the vertical direction while being accommodated in the drainage part 11, and the valve seat of the flapper type on-off valve 60 that opens and closes the drainage part 11 at the upper end opening. Is forming. The on-off valve 60 connects the first spherical chain 62 and the lower end portion of the second spherical chain 63 that connects the float member 63A on the way. The upper end portions of the first ball chain 62 and the second ball chain 63 are rotating shaft members connected to a cleaning handle 64 that is rotatably attached to the right side surface (the side surface shown on the right side in FIG. 1) of the outer tank 20. 64A. For this reason, in this toilet bowl cleaning tank, the opening degree and opening time of the on-off valve 60 can be changed by changing the rotation direction of the cleaning handle 64, and the toilet flushing of large washing or small washing is executed. be able to. The tank main body 10 A has an overflow pipe 65 that stands up inside and communicates with the drainage section 11.

As shown in FIGS. 3 and 4, the tank body 10A has a notch 12 that opens at the upper end of the right side surface. The notch 12 is formed so as to pass through a rotating shaft member 64 A connected to a cleaning handle 64 attached to the right side surface of the outer tank 20. Further, the tank body 10A has cut-

off side portions

13A, 13B, and 13C that are provided on both the left and right sides of the upper end portion of the front side surface and the front side of the upper end portion of the left side surface and can be cut off. These cut

side surfaces

13A, 13B, and 13C have a plurality of slit-shaped openings 14 arranged in series along the outer periphery of the shape that can be cut. For this reason, by cutting the connecting portion 14A that connects the openings 14, notch portions that open to the left and right sides of the upper end portion of the front side surface of the tank body 10A or the front side of the upper end portion of the left side surface can be easily obtained. Can be provided.

Depending on the specifications of the toilet bowl cleaning tank, the cleaning handle 64 may be attached to either the left or right side of the front side of the outer tank 20 or the left side. For example, when the cleaning handle 64 is attached to the left side surface of the outer tank 20, the cut side surface portion 13C provided at the upper end portion of the left side surface of the tank body 10A is cut out. As a result, as shown in FIG. 5, the notch 15 can be formed, and the rotary shaft member 64 A of the cleaning handle 64 can be inserted into the notch 15. Similarly, when the cleaning handle 64 is attached to either the left or right side of the front side surface of the outer tank 20, the corresponding one of the cut

side surface portions

13A and 13B provided at the upper end portion of the front side surface of the tank body 10A is attached. cut out. The rotary shaft member 64A of the cleaning handle 64 can be inserted through the notch formed thereby. Thus, the tank body 10A can also be used for a toilet cleaning tank in which the cleaning handle 64 is attached to either the left or right side of the front side of the outer tank 20 or the left side.

If notches are provided corresponding to a plurality of attachment positions of the cleaning handle 64, the left and right sides of the upper end of the front side of the tank main body 10A and the front side of the upper end of the left side are provided with an earthquake, etc. Therefore, when the toilet bowl washing tank is shaken or tilted, the washing water stored in the tank main body 10A may flow out from the notches into the outer tank 20. On the other hand, since this tank body 10A has the cut-out

side portions

13A, 13B, and 13C closed, the wash water stored in the tank body 10A is prevented from flowing into the outer tank 20. can do.

As shown in FIGS. 1, 6, and 7, the tank body 10A has a ball tap 70 attached to the rear side of the upper end portion of the left side surface portion. The ball tap 70 has a water supply pipe 73 connected to the upstream connecting portion. The water supply pipe 73 is formed of a flexible hose and communicates with the water supply source S. The ball tap 70 has a floating ball 71 that moves up and down by raising and lowering the level of the cleaning water in the tank body 10A. The ball tap 70 lowers the level of the washing water in the tank main body 10 A by executing the toilet cleaning, and when the floating ball 71 descends, the ball tap 70 opens the on-off valve and discharges the washing water from the water outlet 72. In addition, when the toilet bowl cleaning is finished and the water level of the cleaning water in the tank main body 10 A rises, the ball tap 70 closes the on-off valve when the floating ball 71 rises above the set height, Stop flushing water.

As shown in FIGS. 1, 6, and 8, the tank body 10 A houses the intake device 80 on the right side (right side in FIG. 1). The intake device 80 includes a hollow case 81 whose lower end is open, a valve mechanism (not shown) housed at the upper end of the case 81, and an intake pipe 82 connected to the upper end of the valve mechanism. The intake pipe 82 is formed of a flexible hose and communicates with the toilet drainage channel 2 communicating with the downstream side of the toilet bowl provided in the toilet body 1.

When the flushing water level in the tank body 10A outside the case 81 becomes equal to or lower than the set water level due to the toilet cleaning, the intake device 80 opens so that the valve mechanism communicates with the inside of the case 81 and the intake pipe 82. I speak. As a result, the air in the toilet drainage channel 2 is sucked into the case 81 via the intake pipe 82 and the valve mechanism, and the level of the washing water in the case 81 is lowered. Thus, the air intake device 80 sucks the air in the toilet drainage channel 2 after the start of toilet flushing. Thereby, a siphon action can be reliably generated in the toilet drainage channel 2. For this reason, the flush toilet equipped with the toilet flushing tank provided with the intake device 80 can generate a siphon action with a small amount of flushing water, and can perform toilet flushing satisfactorily.

As shown in FIGS. 1, 2, and 7 to 9, the dewproof material 10B includes cylindrical first insertion holes 16 and second insertion holes 17 penetrating vertically in the lower part of the rear left and right corners. have. The first insertion hole 16 communicates with a first through hole 21 of the outer tank 20 described later, and the second insertion hole 17 communicates with a second through hole 22 of the outer tank 20 described later.

The dewproof material 10 B has an annular convex portion 16 A in which the peripheral edge portion of the lower end opening of the first insertion hole 16 is projected downward. Further, the dewproof material 10 B has an annular convex portion 17 A in which the peripheral edge portion of the lower end opening of the second insertion hole 17 is projected downward. That is, these

convex portions

16A and 17A are projected downward from the bottom surface of the bottom portion of the inner tank 10 constituted by the tank main body 10A and the dewproof material 10B, and a central hole 51A formed in the

packings

51 and 52 described later. , 52A, and the

packings

51 and 52 can be positioned.

As shown in FIG. 9, the dewproof material 10B has an opening 18 through which the drainage part 11 of the tank body 10A is inserted. The dewproof material 10 B forms a leg 18 A that protrudes downward along the peripheral edge of the opening 18. The leg portion 18A is provided with six water passages 18B recessed upward. That is, the water passage 18B is formed by recessing the lower surface of the bottom of the inner tank 10 constituted by the tank body 10A and the dewproof material 10B upward.

As shown in FIGS. 6 and 9, the dewproof material 10 B has a left side (lower side in FIG. 6) on the front side surface (side surface on the right side in FIG. 6) and a rear side surface (side surface located on the left side in FIG. 6). ) On the right side (upper side in FIG. 6) has belt-like

convex portions

19A and 19B extending from the upper end to the vicinity of the lower end. When the inner tank 10 composed of the tank main body 10 A and the dewproof material 10 B is fixed to the outer tank 20, the tightening nut 30 is tightened with respect to the drainage part 11 protruding downward from the lower surface of the bottom of the outer tank 20. For this reason, although the force which rotates centering on the drainage part 11 is added to the inner tank 10, since

convex part

19A, 19B contact | abuts the inner surface of the outer tank 20, it controls that the inner tank 10 rotates within the outer tank 20. can do. For this reason, since the washing | cleaning handle 64, the water supply pipe | tube 73, and the intake pipe 82 can be assembled | attached favorably, without the assembly | attachment position of the inner tank 10 shifting | deviating with respect to the outer tank 20, preventing the water leak from an assembly | attachment part. Can do.

Moreover, since the

convex portions

19A and 19B are integrally formed with the dew-proof material 10B made of expanded polystyrene, they have elasticity. For this reason, when the inner tank 10 is inserted into the outer tank 20, the

protrusions

19A and 19B can be inserted while being in contact with the inner surface of the outer tank 20, and the

protrusions

19A and 19B can be reliably inserted into the inner surface of the outer tank 20. Can abut. Therefore, the inner tank 10 can be inserted into a predetermined position in the outer tank 20 and the rotation of the inner tank 10 can be reliably regulated. Further, the convex portions 19 A and 19 B are formed extending to the vicinity of the lower end of the inner tank 10. This is because when the outer tank 20 is made of earthenware, the lower part (near the bottom) of the outer tank 20 is less deformed at the time of manufacture, and the

protrusions

19A and 19B are reliably brought into contact with the inner surface thereof.

As shown in FIGS. 1 and 2, the outer tank 20 has a fixing hole 23 that passes through the center of the bottom. The fixing hole 23 is formed in a circular shape whose opening shape is slightly larger than the drainage part 11 of the inner tank 10. For this reason, when the inner tank 10 is fixed to the outer tank 20, a gap is formed between the inner peripheral surface of the fixing hole 23 and the outer peripheral surface of the drainage part 11. Further, the outer tank 20 has a first through hole 21 and a second through hole 22 that are vertically penetrated in the left and right corners behind the bottom.

As shown in FIG. 9, the

packings

51 and 52 have a substantially rectangular flat plate shape, and have center holes 51 A and 52 A penetrating the center part. As described above, the

packings

51 and 52 are positioned by inserting the annular

convex portions

16A and 17A of the dewproof material 10B into the

central holes

51A and 52A, and are attached to the lower surface of the dewproof material 10B (inner tank 10). Has been. For this reason, the

central holes

51A and 52A of the

packings

51 and 52 communicate with the first insertion hole 16 and the second insertion hole 17 formed in the dewproof material 10B.

In the toilet cleaning tank having such a configuration, when the inner tank 10 is fixed to the outer tank 20, first, the convex portions 19 A and 19 B formed on the dewproof material 10 B of the inner tank 10 are brought into contact with the inner surface of the outer tank 20. Then, the inner tank 10 is inserted from the upper opening of the outer tank 20. Then, since the inner tank 10 can be inserted into a predetermined position in the outer tank 20, the drainage part 11 of the inner tank 10 is inserted into the fixing hole 23 of the outer tank 20, and the lower part of the drainage part 11 is connected to the fixing hole 23. It is possible to project downward from the lower end opening. Further, the

central holes

51A and 52A of the

packings

51 and 52 attached so as to communicate with the first insertion hole 16 and the second insertion hole 17 of the inner tank 10 are respectively connected to the first through hole 21 and the outer tank 20. It can be arranged at a position communicating with the second through hole 22.

In this state, the tightening nut 30 is tightened to the thread formed on the outer peripheral surface of the drainage portion 11 of the inner tank 10 protruding below the fixing hole 23 of the outer tank 20. As a result, the bottom of the inner tank 10 and the tightening nut 30 sandwich the bottom of the outer tank 20, and the inner tank 10 and the outer tank 20 can be fixed. At this time, the upper surface of the peripheral edge of the upper end opening of the first through hole 21 and the second through hole 22 provided in the outer tank 20 and the lower surface of the bottom of the inner tank 10 (the surface on which the

packings

51 and 52 are attached) Between, the

packings

51 and 52 are clamped in a watertight manner while being crushed. For this reason, it is possible to reliably prevent water from flowing out from the first through hole 21 and the second through hole 22 to the outside. Moreover, the effort which attaches only packing 51 and 52 is not required. Furthermore, since it is not necessary to increase the thickness around the first through hole 21 and the second through hole 22, even when the outer tank 20 is manufactured with ceramics, cracks due to shrinkage deformation during manufacturing can be suppressed. In addition, the yield can be improved and the same raw material as that of a normal toilet bowl can be used.

Therefore, the toilet bowl cleaning tank of Example 1 has good manufacturability and can reliably prevent water leakage.

The water supply pipe 73 is inserted from the inside of the outer tank 20 through the first insertion hole 16 and the first through hole 21 and is exposed from the bottom of the outer tank 20. At this time, since the first insertion hole 16 is formed to extend upward from the first through hole 21, the water supply pipe 73 can be easily inserted into the upper end opening of the first insertion hole 16. Further, since the first insertion hole 16 guides the water supply pipe 73 to the first through hole 21, the water supply pipe 73 can be easily inserted into the first through hole 21. The intake pipe 82 is exposed from the bottom of the outer tank 20 through the second insertion hole 17 and the second through hole 22 from within the outer tank 20. At this time, since the second insertion hole 17 is also formed to extend upward from the second through hole 22, the intake pipe 82 can be easily inserted into the upper end opening of the second insertion hole 17. Further, since the second insertion hole 17 guides the intake pipe 82 to the second through hole 22, the intake pipe 82 can be easily inserted into the second through hole 22. Furthermore, since the water supply pipe 73 and the intake pipe 82 are exposed from the bottom of the outer tank 20, it is possible to make a toilet flushing tank with a clean appearance, and to reliably leak water from the toilet flushing tank. Can be prevented.

In addition, the height (vertical dimension) of the first insertion hole 16 and the second insertion hole 17 is the reflow rate of the water leakage generated between the outer tank 20 and the inner tank 10, that is, the ball tap 70. The water supply flow rate is higher than the water level temporarily stored between the outer tank 20 and the inner tank 10 when water leaks. For this reason, it is possible to reliably prevent water leakage from the toilet cleaning tank.

When the inner tank 10 is fixed to the outer tank 20, the leg portion 18 A formed on the lower surface of the bottom portion of the inner tank 10 is in contact with the upper surface of the bottom portion of the outer tank 20. Through the water passage 18B provided in the leg portion 18A, the condensed water and water leakage generated between the outer tank 20 and the inner tank 10 are caused by a gap between the inner peripheral surface of the fixing hole 23 and the outer peripheral surface of the drainage portion 11. Can be discharged out of the outer tank 20. This toilet flushing tank is placed on the upper surface of the rear part of the toilet body 1 and is attached to the toilet body 1 by two bolts B extending downward from the bottom of the outer tank 20. At this time, the drainage part 11 is inserted into the inlet of the distribution pipe 3 that supplies the wash water to the toilet bowl part of the toilet body 1. For this reason, the dew condensation water and water leaked out of the outer tank 20 from the gap between the inner peripheral surface of the fixing hole 23 and the outer peripheral surface of the drainage portion 11 can be drained to the toilet bowl portion.

<Example 2>
As shown in FIG. 10, the toilet bowl cleaning tank of the second embodiment is different from the first embodiment in that it does not include an intake device. Since the intake tank is not provided, the outer tank 120 has only the first through hole 21 penetrating the left corner behind the bottom (the second through hole penetrating the right corner behind the bottom). Not.) Other configurations are the same as those of the first embodiment, and the same configurations as those of the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted.

This toilet flushing tank can also be fixed to the outer tank 20 by tightening the tightening nut 30 to the lower part of the drainage part 11 of the inner tank 10 protruding below the fixing hole 23 of the outer tank 20. At this time, the packing 51 is crushed between the upper surface of the peripheral edge of the upper end opening of the first through-hole 21 provided in the outer tank 20 and the lower surface of the bottom of the inner tank 10 (the surface on which the packing 51 is stuck). It is pinched while being watertight. For this reason, it is possible to reliably prevent water from flowing out from the first through hole 21 to the outside. Moreover, the effort which attaches only packing 51 is not required. Furthermore, since it is not necessary to increase the thickness around the first through-hole 21, even when the outer tank 20 is manufactured with ceramics, cracks due to shrinkage deformation during manufacturing can be suppressed, and the yield is improved. In addition, the same raw material as that of a normal toilet bowl can be used.

Therefore, the toilet bowl cleaning tank of Example 2 is also highly manufacturable and can reliably prevent water leakage.

The present invention is not limited to the first and second 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 Examples 1 and 2, the water supply pipe and the intake pipe are inserted through the through hole, but the through hole may be a bolt through which a toilet bowl is attached to the toilet body. In this case, it is not necessary to provide a central hole in the packing or an insertion hole in the inner tank.
(2) In Examples 1 and 2, the water passage is provided at the bottom of the inner tank, but may be provided at the bottom of the outer tank.
(3) In Examples 1 and 2, condensed water and water leakage were drained from the gap between the inner peripheral surface of the fixed hole and the outer peripheral surface of the fixed portion through the water passage, but communicated with the toilet bowl at the bottom of the outer tank. You may provide other drainage paths, such as penetrating a drainage hole.
(4) In Examples 1 and 2, the convex portion for positioning the packing is provided on the lower surface of the bottom of the inner tank. However, the packing may be positioned by another structure. Moreover, it is not necessary to have the packing positioning structure.
(5) In Examples 1 and 2, the inner tank is composed of a tank body and a dew-proof material formed separately from the tank body, but may have other dew-proof structures.

DESCRIPTION OF SYMBOLS 1 ... Toilet body 10 ... Inner tank 10A ... Tank main body 10B ... Dewproof material 11 ... Drain part (fixed part)
16, 17 ... insertion hole (16 ... first insertion hole, 17 ... second insertion hole)
16A, 17A ... convex portion 18B ... water passage 20 ...

outer tank

21, 22 ... through hole (21 ... first through hole, 22 ... second through hole)
23 ... Fixing hole 30 ... Fixing

member

51, 52 ... Packing (water stop member)
73 ... Water supply pipe 80 ... Intake device 82 ... Intake pipe

Claims

A toilet flushing tank comprising an inner tank for storing flush water to be supplied to a toilet body of a flush toilet, an outer tank for storing the inner tank, and a fixing member for fixing the inner tank to the outer tank. ,
The inner tank has a fixing portion used for fixing to the outer tank,
The outer tank has a fixing hole that penetrates the bottom and is used for fixing the inner tank, and a through hole that penetrates the bottom separately from the fixing hole.
By fixing the inner tank to the outer tank by the fixing member using the fixing hole and the fixing portion, between the upper surface of the peripheral edge of the upper end opening of the through hole and the lower surface of the bottom portion of the inner tank. A toilet flushing tank comprising a water stop member sandwiched in a watertight manner.
The toilet cleaning tank according to claim 1, wherein the through hole is inserted with a water supply pipe for supplying cleaning water to the inner tank.
An air intake device housed in the outer tank is provided, and the through hole passes through an air intake pipe that communicates the air intake device and a toilet drainage channel provided in the toilet body. The toilet cleaning tank according to 1.
The toilet tank according to claim 2 or 3, wherein the inner tank has an insertion hole that communicates with the through hole and penetrates in the vertical direction.
The inner tank includes a water passage that has a lower surface of the bottom portion recessed upward and communicates with a gap between an inner peripheral surface of the fixing hole and an outer peripheral surface of the fixing portion. The toilet bowl washing tank according to any one of claims 1 to 3.
The toilet tank according to any one of claims 1 to 3, wherein the inner tank has a convex portion that projects downward from the bottom surface of the bottom portion and positions the water stop member.
The toilet tank according to any one of claims 1 to 3, wherein the inner tank includes a tank body and a dew-proof material covering an outer peripheral surface of the tank body.