Water closet apparatus

Abstract

To provide a water closet apparatus that can suppress the occurrence of condensation even when an opening is provided at a position lower than a storage water level of the flush tank in a condensation-proof layer surrounding the flush tank.SOLUTION: The water closet apparatus (1) of the present invention, which is equipped with a flush tank, comprises a water closet body (2), a resin flush tank (26) attached to the rear part of the water closet body for storing washing water to clean the water closet body, and a condensation-proof layer (48) provided to surround the flush tank to suppress condensation in the flush tank. The flush tank has a protrusion (46) extending outward through an opening (48a) formed in the condensation-proof layer at a position lower than the storage water level of the flush tank, and a double-wall part (46a) is formed to fill at least a part of the opening formed in the condensation-proof layer.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a flush toilet apparatus, and in particular to a flush toilet apparatus equipped with a flush water tank. [Background technology]

[0002] Japanese Patent Laid-Open Publication No. 2003-335588 (Patent Document 1) describes a heat-insulating structure in a ceramic tank for a ceramic flush toilet and a manufacturing method thereof. In this ceramic tank, a heat-insulating layer is formed inside the ceramic tank body, which has fine hollow ceramic particles with a reduced pressure or vacuum inside. Condensation is generally likely to occur around the water storage tank that stores flush water, especially in winter, and if the condensed water falls onto electrical components arranged below the water storage tank, it can cause deterioration or failure of the electrical components. In the ceramic tank described in Patent Document 1, a heat-insulating layer is formed inside the tank body to suppress condensation and prevent problems caused by condensed water. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2003-335588 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, a flush water tank for storing flush water needs to be connected to an external member, for example, to support the flush water tank. For this reason, it is difficult in practice to completely cover the entire flush water tank with a heat insulating layer, as in the ceramic tank described in Patent Document 1. For this reason, in many cases, an opening is provided somewhere in the heat insulating layer, and the flush water tank is connected to a member outside the heat insulating layer through this opening. When an opening is provided in the heat insulating layer, condensation is likely to occur at the opening and on the member extending through the opening, causing problems due to the generation of condensed water.

[0005] Furthermore, if the opening in the insulation layer (dew-proof layer) is located above the stored water level in the flush water tank, condensation is less likely to occur at that opening, and the generation of condensed water can be suppressed. However, if the opening in the insulation layer is located above the stored water level, there are many design constraints, making it difficult to obtain a flush toilet device that has good performance and an attractive design.

[0006] Therefore, the object of the present invention is to provide a flush toilet apparatus that can suppress the occurrence of condensation even when an opening is provided in the dew-proof layer surrounding the flush water tank at a position lower than the stored water level in the flush water tank. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the present invention is a flush toilet device equipped with a flush water tank, comprising a flush toilet body, a flush water tank made of resin attached to the rear of the flush toilet body for storing flush water to flush the flush toilet body, and a dew-proof layer provided to surround the periphery of the flush water tank in order to suppress condensation in the flush water tank, the flush water tank being provided with a protrusion that passes through an opening formed in the dew-proof layer below the stored water level of the flush water tank and extends outward, and a double wall portion is formed so as to fill at least a portion of the opening formed in the dew-proof layer.

[0008] According to the present invention configured as described above, a dew-proof layer for suppressing condensation is provided so as to surround the periphery of the flush water tank, so that it is possible to prevent rusting of metal parts and water damage to electrical parts due to condensation occurring in the flush water tank. In addition, it is often necessary to provide a protruding portion on the flush water tank for the purpose of fixing the flush water tank, etc. When a protruding portion is provided on the flush water tank in this way, it is difficult to cover that portion with a dew-proof layer, and it is necessary to provide an opening in the dew-proof layer for the protruding portion to penetrate through. When such an opening in the dew-proof layer is provided, particularly below the water level of the flush water tank, condensation is likely to occur at the opening portion of the dew-proof layer. According to the present invention configured as described above, a double wall portion is formed on the flush water tank so as to fill at least a part of the opening formed in the dew-proof layer, so that heat insulation can be performed by the double wall portion, and condensation at the opening of the dew-proof layer can be suppressed. As a result, it is possible to provide a protruding portion below the water level of the flush water tank while suppressing the occurrence of condensation.

[0009] In the present invention, preferably, the dew protection layer is attached to the flushing water tank by inserting the flushing water tank from above, the opening formed in the dew protection layer is constituted by a slit-shaped notch extending downward from the upper end of the dew protection layer, and the double wall portion is formed so as to extend from at least the lower end of the notch to the height of the stored water level in the flushing water tank.

[0010] According to the present invention configured in this manner, the dew protection layer is attached to the flush water tank by inserting the flush water tank from above, so that the dew protection layer can be easily attached to the flush water tank. Also, the protruding portion can be passed through the slit-shaped notch extending downward from the upper end of the dew protection layer, so that an opening through which the protruding portion passes can be easily formed in the dew protection layer.

[0011] In the present invention, the protruding portion is preferably provided with a fixing portion for fixing the flush water tank to the flush toilet main body.

[0012] According to the present invention configured in this manner, a fixing portion for fixing the flush water tank to the flush toilet body is provided on the protruding portion, so the fixing portion can be positioned anywhere desired without compromising the anti-condensation performance.

[0013] In the present invention, the flush water tank is preferably provided with a drain outlet for discharging the flush water in the flush water tank into the flush toilet body, and two or more protrusions with fixed parts are provided on the flush water tank and are arranged on either side of the drain outlet so as to sandwich the drain outlet when viewed from above.

[0014] With the present invention configured in this manner, protrusions with fixing parts are arranged on either side of the drain outlet so as to sandwich the drain outlet when viewed from above, making it possible to strictly regulate the position of the drain outlet in relation to the flush toilet body and reliably ensuring watertightness between the flush toilet body and the flush water tank.

[0015] In the present invention, the fixing portion provided on the protrusion formed on the front side of the flush water tank is preferably positioned below the upper surface of the rim portion of the flush toilet main body.

[0016] With the present invention configured in this manner, the fixing part provided on the protrusion formed on the front side of the flush water tank is positioned below the top surface of the rim part of the flush toilet main body, so even when the private parts cleaning device is placed on the top surface of the flush toilet main body, interference between the fixing part and the private parts cleaning device can be avoided. Effect of the Invention

[0017] According to the flush toilet apparatus of the present invention, the occurrence of condensation can be suppressed even when an opening is provided in the dew-proof layer surrounding the periphery of the flush water tank at a position lower than the stored water level in the flush water tank. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a plan view showing a flush toilet apparatus according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a side cross-sectional view taken along line II-II in FIG. 1, of a flush toilet apparatus according to an embodiment of the present invention. [Diagram 3] FIG. 2 is a block diagram showing a flush water supply system in a flush toilet apparatus according to an embodiment of the present invention. [Figure 4] FIG. 2 is an enlarged cross-sectional side view showing a flush water tank portion provided in a flush toilet apparatus according to an embodiment of the present invention. [Diagram 5] FIG. 2 is an enlarged cross-sectional top view showing a portion of the flush water tank provided in the flush toilet device of the present embodiment. [Figure 6] FIG. 2 is an exploded perspective view showing the flush water tank and dew-proof layer provided in the flush toilet device of the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Next, a flush toilet apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings. Fig. 1 is a plan view showing a flush toilet apparatus according to an embodiment of the present invention, Fig. 2 is a side cross-sectional view taken along line II-II in Fig. 1.

[0020] As shown in Figures 1 and 2, a flush toilet device 1 according to an embodiment of the present invention is a siphon jet type flush toilet, and comprises a ceramic flush toilet body 2, a resin toilet seat and toilet lid (not shown) placed on the top surface of this flush toilet body 2, and a flush water supply device 4 placed at the upper rear of the flush toilet body 2 and covered by a resin cover (not shown). Note that the dew-proof layer 48, which will be described later, has been omitted from Figure 2.

[0021] The flush toilet main body 2 is formed with a bowl portion 6 for receiving waste, a drain trap pipe 8 provided at the bottom of the bowl portion 6 for discharging waste by siphon action, a rim spout 10 for rim water spouting, a rim water conduit 12 for directing flushing water to the rim spout, a jet water spout 14 for jet water spouting, and a jet water conduit 16 for directing flushing water to the jet water spout 14.

[0022] The bowl portion 6 comprises a bowl-shaped waste receiving surface 18, a rim portion 20 formed along the upper edge of the bowl portion 6, and a shelf portion 21 formed between the waste receiving surface 18 and the rim portion 20. The bowl portion 6 also comprises a pot portion 22 formed in the area below the waste receiving surface 18 and connected to the drain trap pipe 8. A water sealing surface W is formed inside the pot portion 22.

[0023] The drain trap pipeline 8 has an inlet portion 8a, an ascending pipeline 8b extending upward from the inlet portion 8a, a descending pipeline 8c extending downward from the ascending pipeline 8b, and a top portion 8d located between the descending pipeline 8c and the ascending pipeline 8b and determining the seal water level. Here, the lower end of the descending pipe 8c of the drain trap pipe 8 is connected to a drain pipe (not shown) via a drain socket (not shown).

[0024] When looking at the flush toilet body 2 from the front, the rim spout 10 is formed on the rear left side of the rim section 20. The rim spout 10 spouts flush water forward, and this flush water swirls around the inner circumferential surface of the rim section 20 and the shelf surface of the shelf section 21 as it flows down to the waste receiving surface 18.

[0025] The rim water conduit 12 is formed in a tapered shape with the flow path cross section gradually becoming smaller towards the rim water outlet 10. Flush water is supplied to the rim water conduit 12 from the water mains via a flush water supply device 4, and flush water is discharged from the rim water outlet 10 by the water supply pressure of the water mains.

[0026] The jet water outlet 14 is formed in the bottom of the bowl portion 6. The jet water outlet 14 is disposed opposite the inlet 8a of the drain trap pipe 8 and is directed toward the inlet 8a of the drain trap pipe 8. The jet water outlet 14 ejects flush water toward the inlet 8a of the drain trap pipe 8, and this flush water flows into the drain trap pipe 8 to activate the siphon action.

[0027] The jet water conduit 16 comprises an upstream flow path 16a extending forward from the flush water supply device 4, a curved flow path 16b bending from this upstream flow path, and a downstream flow path 16c extending rearward from this curved flow path and connecting to the jet water outlet 14. Flush water is supplied to the jet water conduit 16 from a flush water tank 26 (Fig. 3) of the flush water supply device 4, and the flush water is discharged from the jet water outlet 14 due to the head pressure of the flush water.

[0028] Next, with additional reference to Figs. 3 to 6, the flush water supply device 4 provided in the flush toilet device 1 according to an embodiment of the present invention will be explained. Fig. 3 is a block diagram showing a flush water supply system in a flush toilet apparatus 1 of an embodiment of the present invention. Fig. 4 is a side cross-sectional view showing an enlarged portion of the flush water tank provided in the flush toilet apparatus 1 of this embodiment. Fig. 5 is a top cross-sectional view showing an enlarged portion of the flush water tank provided in the flush toilet apparatus 1 of this embodiment. Fig. 6 is an exploded perspective view showing the flush water tank and dew-proof layer provided in the flush toilet apparatus 1 of this embodiment.

[0029] As shown in FIG. 3, the flush water supply device 4 is composed of a valve unit 24 that starts and stops the supply of flush water from the water supply, and a flush water tank 26 made of resin that stores the flush water supplied via the valve unit 24.

[0030] The valve unit 24 incorporates a constant flow valve 30, a tank water supply solenoid valve 32, a rim water discharge solenoid valve 34, and a controller 35 that controls the tank water supply solenoid valve 32 and the rim water discharge solenoid valve 34. The tank water supply solenoid valve 32 and the rim water discharge solenoid valve 34 each incorporate a diaphragm valve (not shown), and flush water is supplied and stopped by opening and closing these diaphragm valves. The flush water tank 26 also incorporates a drain valve 36, a float switch 38, and a vacuum breaker 40. In addition to the diaphragm valve, the tank water supply solenoid valve 32 may be provided with a manually operated valve that is opened and closed manually.

[0031] In this embodiment, the flush water tank 26 is a small resin tank with a volume of approximately 2 liters. The lower part of the flush water tank 26 is positioned below the upper surface of the rim part 20 of the flush toilet main body 2, and above the top part 8d of the drain trap pipe 8. This makes the flush toilet apparatus 1 a low-silhouette type toilet. Also, in this embodiment, the flush water in the flush water tank 26 is discharged from the jet spout 14 by gravity.

[0032] Stopcock 28 is configured to stop the water supplied from water pipe 28a during maintenance or the like, and tap water that passes through stopcock 28 flows into valve unit 24 as flushing water. Therefore, during normal use, stopcock 28 is used in the "open" state. The constant flow valve 30 is provided downstream of the stopcock 28 and is configured to regulate the water supplied from the waterworks to a predetermined flow rate and allow it to flow out. The water flowing out from the constant flow valve 30 is branched and flows into the tank water supply solenoid valve 32 and the rim water discharge solenoid valve 34, respectively.

[0033] The tank water supply solenoid valve 32 is opened and closed based on the user's flushing operation, and flush water flowing out from the tank water supply solenoid valve 32 flows into the flush water tank 26 and is stored there. The rim water spouting solenoid valve 34 is opened and closed based on the user's flushing operation, and flush water flowing out from the rim water spouting solenoid valve 34 is discharged from the rim water outlet 10 of the flush toilet main body 2 via the rim water conduit 12.

[0034] The controller 35 is configured to receive a control signal from a remote control 35a operated by a user, and to control the opening and closing of the tank water supply solenoid valve 32 and the rim water discharge solenoid valve 34. The controller 35 is also configured to control the tank water supply solenoid valve 32 based on a detection signal from a float switch 38.

[0035] Drain valve 36 is provided on the bottom surface of flush water tank 26, and is opened based on the user's flushing operation, causing flush water stored in flush water tank 26 to be discharged from rim spout 10 via jet water conduit 16. Drain valve 36 is also configured to be pulled up from drain outlet 26a by toilet flushing motor 36a provided on the top of flush water tank 26, opening drain outlet 26a. Toilet flushing motor 36a is configured to pull up drain valve 36 at a predetermined timing based on a control signal from controller 35 when the toilet is being flushed.

[0036] The float switch 38 is configured to detect the water level in the flush water tank 26, and is configured to detect when the water level in the flush water tank 26 reaches a predetermined stored water level and send a detection signal to the controller 35.

[0037] The vacuum breaker 40 is positioned above a predetermined stored water level inside the flush water tank 26, and is provided downstream of the rim water spouting solenoid valve 34 and upstream of the rim water conduit 12. As a result, when the rim water spouting solenoid valve 34 side becomes negative pressure, air is sucked in from the vacuum breaker 40, preventing flush water from flowing back from the rim water spouting port 10 side to the rim water spouting solenoid valve 34 side. Also, when flush water flows back from the rim water spouting port 10 side, the backflowing flush water flows out of the vacuum breaker 40 and flows into the flush water tank 26.

[0038] Next, the flush water tank and its dew-proof structure will be described with reference to FIGS. As shown in Figure 4, the flush water tank 26 is a resin tank in a roughly rectangular parallelepiped shape, and is attached to the rear of the flush toilet main body 2, and is configured to store flush water used to flush the flush toilet main body 2. Additionally, a drain outlet 26a is provided in the bottom surface of the flush water tank 26, and this drain outlet 26a is configured to be opened and closed by a drain valve 36.

[0039] The jet water conduit 16 provided in the flush toilet main body 2 is connected to the downstream side of this drain outlet 26a, and when the drain valve 36 is opened, flush water in the flush water tank 26 is discharged into the jet water conduit 16 in the flush toilet main body 2. As a result, flush water passes through the jet water conduit 16 and is discharged from the jet water outlet 14. Note that in this embodiment, flush water in the flush water tank 26 is only discharged from the jet water outlet 14, but the present invention can also be applied to flush toilet apparatus of the type in which the entire amount of flush water used for flushing is supplied from the flush water tank.

[0040] Additionally, the flush water tank 26 is attached to the rear of the flush toilet main body 2 via an attachment member 42. This attachment member 42 has a horizontal section 42a that is placed on the upper rear surface of the flush toilet main body 2, and vertical sections 42b that rise vertically from the horizontal section 42a, on the front and rear sides of the flush water tank 26. This attachment member 42 is fixed to the flush toilet main body 2 with attachment screws 44, while placed on the upper rear surface of the flush toilet main body 2.

[0041] 4 and 6, fixing brackets 46, which are protrusions for attaching the flush water tank 26 to the mounting member 42, are provided on the front and rear side wall surfaces of the flush water tank 26. These fixing brackets 46 are molded integrally with the flush water tank 26 on the front and rear side wall surfaces of the flush water tank 26, and the flush water tank 26 is fixed to the mounting member 42 via the fixing brackets 46.

[0042] In addition, the fixing bracket 46 has a double wall portion 46a extending vertically and approximately parallel to the side wall surface of the flush water tank 26, and a fixing portion 46b protruding from the lower end of this double wall portion 46a approximately perpendicular to the side wall surface of the flush water tank 26.

[0043] The double wall portion 46a is a long and narrow rectangular wall portion that extends downward from the upper end of the flush water tank 26, approximately parallel to the side wall surface of the flush water tank 26. By providing the double wall portion 46a on the side wall surface of the flush water tank 26 in this manner, a thin rectangular air layer (space) is formed between the side wall surface of the flush water tank 26 and the double wall portion 46a. In this embodiment, the air layer formed between the side wall surface of the flush water tank 26 and the double wall portion 46a is configured so that it is thin on the upper side and becomes slightly thicker downward.

[0044] The fixing portion 46b is a portion that protrudes from the lower end of the double wall portion 46a at a substantially right angle to the side wall surface of the flush water tank 26, and a hole is provided in the fixing portion 46b for passing the fixing screw 46c through. By screwing the fixing screw 46c through the hole provided in this fixing portion 46b and into the upper end of the vertical portion 42b of the mounting member 42, the flush water tank 26 can be fixed to the flush toilet main body 2 via the mounting member 42.

[0045] Furthermore, as shown in Figure 5, the fixing brackets 46 are arranged on either side of the drain outlet 26a of the flush water tank 26, so as to sandwich the drain outlet 26a in a top view. By providing fixing brackets 46 on the front and rear of the drain outlet 26a in this way, so as to sandwich the drain outlet 26a, the position of the drain outlet 26a of the flush water tank 26 can be precisely defined with respect to the flush toilet body 2, and watertightness can be reliably ensured between the drain outlet 26a of the flush water tank 26 and the jet water conduit 16 (Figure 4) of the flush toilet body 2.

[0046] Next, as shown in FIG. 6, a dew-proof layer 48 is provided around the flush water tank 26 so as to surround the flush water tank 26, and this dew-proof layer 48 suppresses condensation in the flush water tank 26. The dew-proof layer 48 is a box-shaped polystyrene foam member with an open top, and is attached to the flush water tank 26 by inserting the flush water tank 26 from above. As a result, the outer wall surface of the flush water tank 26 is in close contact with the inner wall surface of the dew-proof layer 48. In other words, by covering the periphery of the flush water tank 26 with the highly insulating dew-proof layer 48, the occurrence of condensation on the outer wall surface of the flush water tank 26 is suppressed. The dew-proof layer 48 can be formed from various materials with high insulating properties, and can be formed from any material other than polystyrene foam, such as polyethylene foam, polypropylene foam, urethane foam, and rock wool.

[0047] Further, notches 48a, which are openings, are provided on the front and rear side wall surfaces of the dew-proof layer 48. Each fixing bracket 46 formed on the side wall surface of the flush water tank 26 extends outward through these notches 48a. As shown in FIG. 6, the notches 48a are slit-shaped notches extending downward from the upper end of the dew-proof layer 48. The double wall portion 46a of the fixing bracket 46 fits snugly into these notches 48a, and the notches 48a are filled by the double wall portion 46a. The double wall portion 46a of the fixing bracket 46 fills the notches 48a provided in the dew-proof layer 48 up to the bottom end.

[0048] In this way, by filling the notch 48a provided in the dew-proof layer 48 with the double wall portion 46a of the fixing bracket 46, the portion of the side wall surface of the flush water tank 26 that is not covered by the dew-proof layer 48 is covered by the air layer formed by the double wall portion 46a. As a result, heat insulation can be ensured even in the notch 48a where the dew-proof layer 48 is open, and condensation on the surface of the flush water tank 26 can be prevented.

[0049] 4, the stored water level L1 of flush water tank 26 during normal use is located above lower end 48b of slit-shaped cutout 48a in dew-proof layer 48. Furthermore, double wall portion 46a provided in flush water tank 26 extends from lower end 48b of cutout 48a to above stored water level L1. In this embodiment, double wall portion 46a extends to near the upper end of flush water tank 26.

[0050] In this embodiment, the upper end of the dew-proof layer 48 is located at a position higher than the stored water level L1 of the flush water tank 26, and the notch 48a extending from the upper end of the dew-proof layer 48 extends to a position lower than the stored water level L1. This notch 48a extending to a position lower than the stored water level L1 is filled by a double wall portion 46a provided in the flush water tank 26, and heat insulation is also ensured at the portion of the notch 48a.

[0051] Furthermore, in this embodiment, the fixing parts 46b of each fixing bracket 46 provided on the front and rear sides of the flush water tank 26 are positioned below the height H of the upper surface of the rim part 20 of the flush toilet main body 2. By fixing the flush water tank 26 at a relatively low position in this way, it is possible to configure a low-silhouette flush toilet device 1 in which the height of the flush water tank 26 is low. Also, by providing the fixing part 46b on the front side of the flush water tank 26 at a relatively low position, even if a private cleaning device (not shown) is placed on the upper surface of the rim part 20 of the flush toilet main body 2, the fixing part 46b is unlikely to interfere with the private cleaning device, allowing for greater freedom in the design of the private cleaning device.

[0052] Next, the operation of a flush toilet device 1 according to an embodiment of the present invention will be explained with reference to Figures 1 and 3. First, when a user operates a toilet flush switch (not shown) provided on remote control 35a, a flush command signal is sent to controller 35. On receiving the flush command signal, controller 35 sends a control signal to rim water spouting solenoid valve 34 of valve unit 24, causing it to open. As a result, flush water supplied from the water supply passes through rim water spouting solenoid valve 34, vacuum breaker 40, and rim water conduit 12, and is discharged from rim water outlet 10. The flush water discharged from rim water outlet 10 forms a swirling flow above waste receiving surface 18 of bowl portion 6, cleaning waste receiving surface 18.

[0053] When a predetermined time has elapsed after the rim water discharge solenoid valve 34 is opened, the controller 35 sends a control signal to the toilet flushing motor 36a, which causes the toilet flushing motor 36a to raise the drain valve 36. This opens the drain valve 36, and flush water stored in the flush water tank 26 is discharged from the jet water discharge port 14 through the jet water conduit 16. This induces a siphon phenomenon in the drain trap pipe 8, and the flush water and waste in the bowl portion 6 are discharged through the drain trap pipe 8.

[0054] The controller 35 also sends a control signal to the tank water supply solenoid valve 32 of the valve unit 24, causing it to open. As a result, flush water supplied from the water supply is supplied through the tank water supply solenoid valve 32 into the flush water tank 26.

[0055] Furthermore, when the water level in flush water tank 26 drops to a predetermined level, drain valve 36 closes drain outlet 26a, stopping water discharge from jet water outlet 14. Even after drain outlet 26a is closed, rim water discharge solenoid valve 34 remains open, and flush water supplied from the water mains is discharged from rim water outlet 10. When the water level in bowl section 6 rises to a predetermined level due to water being discharged from rim water outlet 10 and refilling is completed, controller 35 sends a control signal to rim water discharge solenoid valve 34 of valve unit 24, causing it to close.

[0056] Meanwhile, because tank water supply solenoid valve 32 remains open even after drain valve 36 is closed, the flush water that flows into flush water tank 26 causes the water level in flush water tank 26 to rise. When the water level in flush water tank 26 rises to predetermined storage water level L1, float switch 38 detects this and sends a detection signal to controller 35. On receiving a detection signal from float switch 38, controller 35 sends a control signal to tank water supply solenoid valve 32, causing it to close. This completes the supply of water to flush water tank 26 and one toilet flush.

[0057] According to the flush toilet apparatus 1 of the embodiment of the present invention, a dew-proof layer 48 for suppressing condensation is provided so as to surround the periphery of the flush water tank 26 (Fig. 6), which makes it possible to prevent rusting of metal parts and water getting on electrical parts due to condensation forming in the flush water tank 26. Also, in order to secure the flush water tank 26 to the flush toilet main body 2, a fixing bracket 46, which is a protruding part, is provided on the flush water tank 26. It is difficult to cover a protruding part provided on the flush water tank in this way with the dew-proof layer 48, so the dew-proof layer 48 needs to have a notch 48a, which is an opening for passing the fixing bracket 46 through. The notch 48a in this dew-proof layer 48 extends below the stored water level L1 of the flush water tank 26 (Fig. 4), which makes it easy for condensation to form in the opening part of the dew-proof layer 48.

[0058] According to the flush toilet device 1 of this embodiment, a double wall section 46a is formed in the flush water tank 26 so as to fill at least a portion of the notch 48a formed in the dew-proof layer 48, and therefore the double wall section 46a provides insulation and can suppress condensation at the opening in the dew-proof layer 48. As a result, it becomes possible to provide the fixing bracket 46 below the stored water level L1 of the flush water tank 26 while suppressing the occurrence of condensation (Figure 4).

[0059] Furthermore, according to the flush toilet device 1 of this embodiment, the dew prevention layer 48 is attached to the flush water tank 26 by inserting the flush water tank 26 from above (Figure 6), so the dew prevention layer 48 can be easily attached to the flush water tank 26. Also, the fixing bracket 46 can be passed through by the slit-shaped notch 48a that extends downward from the upper end of the dew prevention layer 48, so an opening through which the fixing bracket 46 passes can be easily formed in the dew prevention layer 48.

[0060] Furthermore, according to the flush toilet device 1 of this embodiment, the fixing bracket 46 is provided with a fixing portion 46b for fixing the flush water tank 26 to the flush toilet main body 2, so the fixing portion 46b can be positioned anywhere desired without compromising anti-condensation performance.

[0061] Furthermore, according to the flush toilet device 1 of this embodiment, fixing brackets 46 with fixing portions 46b are arranged on either side of the drain outlet 26a, sandwiching the drain outlet 26a when viewed from above (Figure 5), making it possible to strictly regulate the position of the drain outlet 26a relative to the flush toilet main body 2 and reliably ensuring watertightness between the flush toilet main body 2 and the flush water tank 26.

[0062] Furthermore, according to the flush toilet device 1 of this embodiment, the fixing part 46b provided on the fixing bracket 46 formed on the front side of the flush water tank 26 is positioned below the top surface of the rim part 20 of the flush toilet main body 2, so even when the private parts cleaning device is placed on the top surface of the flush toilet main body 2, interference between the fixing part and the private parts cleaning device can be avoided.

[0063] Although an embodiment of the present invention has been explained above, various modifications can be made to the above-described embodiment. In particular, in the above-described embodiment, the fixing bracket 46 for fixing the flush water tank 26 to the flush toilet body 2 penetrates the opening (notch 48a) in the dew prevention layer 48, but the protruding portion that penetrates the dew prevention layer 48 may be something other than that for fixing the flush water tank 26. [Explanation of symbols]

[0064] 1 Flush toilet device 2 Flush toilet body 4. Cleaning water supply device 6 Bowl section 8 Drain trap line 8a Entrance 8b Ascending Pipe 8c descending pipe 8d top 10 Rim Spout 12 Rim Waterway 14 Jet outlet 16 Jet Waterway 16a Upstream channel 16b Bent flow path 16c Downstream channel 18 Waste receiving surface 20 Rim section 21 Shelf 22 Pressure Point Section 24 Valve unit 26 Cleaning water tank 26a Drain port 28 Stopcock 28a Water piping 30 Constant flow valve 32 Tank water supply solenoid valve 34 Rim discharge solenoid valve 35 Controller 35a Remote Control 36 Drain valve 36a Toilet flushing motor 38 Float switch 40 Vacuum Breaker 42 Mounting material 42a Horizontal section 42b Vertical section 44 Mounting screw 46 Fixing bracket (protruding part) 46a Double wall section 46b Fixed part 46c Fixing screw 48 Anti-condensation layer 48a Notch (opening) 48b Bottom end

Claims

1. A flush toilet device equipped with a flush water tank, A flush toilet body, a resin flush water tank attached to the rear of the flush toilet body for storing flush water used to flush the flush toilet body; and a dew-proof layer provided so as to surround the periphery of the flush water tank in order to suppress condensation in the flush water tank. A flush toilet apparatus characterized in that the flush water tank is provided with a protrusion that extends outwardly, penetrating an opening formed in the dew prevention layer, below the stored water level of the flush water tank, and a double wall portion is formed so as to fill at least a portion of the opening formed in the dew prevention layer.

2. The dew-proof layer is attached to the flush water tank by inserting the flush water tank from above, The opening formed in the dew-proof layer is constituted by a slit-shaped notch extending downward from an upper end of the dew-proof layer, 2. A flush toilet apparatus according to claim 1, wherein the double wall portion is formed so as to extend from at least the lower end of the notch to the height of the stored water level in the flush water tank.

3. 2. A flush toilet apparatus according to claim 1, wherein the protruding portion is provided with a fixing portion for fixing the flush water tank to the flush toilet main body.

4. the flush water tank is provided with a drain port for discharging flush water within the flush water tank into the flush toilet main body, 4. A flush toilet apparatus according to claim 3, wherein two or more protruding portions provided with the fixing portion are provided on the flush water tank, and are arranged on either side of the drain outlet so as to sandwich the drain outlet when viewed from above.

5. 5. A flush toilet apparatus according to claim 3 or 4, wherein the fixing portion provided on the protrusion formed on the front side of the flush water tank is positioned below the upper surface of the rim portion of the flush toilet main body.

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