Flush toilet apparatus

Abstract

Provided is a flush toilet device capable of achieving a low profile while disposing a flush tank at the rear part of a flush toilet main body. The present invention is a flush toilet device (1) characterized by comprising: a flush toilet main body (2); and a flush water tank (26) which is affixed to the rear part of the flush toilet main body via at least two affixing points (44c, 44d), and which causes flush water to flow into an inflow port (2b) of the flush toilet main body, the inflow port being provided at a position eccentric to one side with respect to the center line in the width direction of the flush toilet main body. Two of the fixing points are respectively disposed on both sides in the front-rear direction with respect to the water outlet, and are disposed such that a straight line connecting the two fixing points passes through the water outlet in plan view, and the rear fixing point of the two fixing points is located further toward the center side in the width direction of the flush toilet body than the center point of the water outlet.

Description

Technical Field

[0001] The present invention relates to a flush toilet device, and in particular to a flush toilet device which is cleaned by flushing water stored in a flushing water tank. Background Art

[0002] Japanese Patent Application Laid-Open No. 2010-7451 (Patent Document 1) describes a water storage tank and a flush toilet equipped with the water storage tank. In the flush toilet, the water storage tank is arranged at the rear of the flush toilet body, and the bowl of the flush toilet body is cleaned by the washing water discharged from the water storage tank. In addition, a water tank drain port is provided at the center in the width direction of the water storage tank, and the washing water in the water storage tank flows into the flush toilet body from a water tank connection hole provided at the center in the width direction of the flush toilet body, which is located just below the water tank drain port, so that the bowl is cleaned.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2010-7451

[0006] However, a drain elbow pipe extending from the bowl to the rear extends in the center of the rear part of the flush toilet body in the width direction. Therefore, the flow path of the flush water extending from the tank connection hole of the flush toilet body into which the flush water in the water storage tank flows overlaps with the position of the drain elbow pipe, and the flow path extending from the tank connection hole needs to be arranged on the upper side of the drain elbow pipe. Therefore, the flow path extending from the tank connection hole needs to be arranged at a high position, which has the problem of making it difficult to make the flush toilet device low-profile. Summary of the invention

[0007] Therefore, an object of the present invention is to provide a flush toilet device that can achieve a low profile while arranging a flush water tank at the rear of a flush toilet body.

[0008] In order to solve the above-mentioned problems, the present invention is a flush toilet device for cleaning by means of cleaning water stored in a cleaning water tank, characterized in that it comprises: a flush toilet body having a bowl and a drainage elbow pipe extending from the bowl; and a cleaning water tank fixed to the rear of the flush toilet body via at least two fixed points, and discharging the stored cleaning water from a drain outlet to cause it to flow into an inlet of the flush toilet body, the inlet of the flush toilet body being arranged at a position eccentric to one side relative to a center line in a width direction of the flush toilet body, two of the fixed points being arranged at both sides in a front-to-rear direction relative to the drain outlet, and being arranged so that a straight line connecting the two fixed points passes through the drain outlet when viewed from above, and the rear fixed point of the two fixed points being located closer to the center side of the width direction of the flush toilet body than the center point of the drain outlet.

[0009] According to the present invention thus constituted, the inlet of the flush toilet body is arranged at a position eccentric to one side relative to the center line of the width direction of the flush toilet body, so that the inlet can be arranged in the flush toilet body to avoid the drainage elbow pipe extending from the bowl. As a result, the inlet can be formed at a low position, and the flush toilet device can be made low-profile. In addition, the straight line connecting the two fixed points passes through the drain port when viewed from above, so the position of the cleaning water tank near the drain port can be firmly defined. Therefore, water leakage between the drain port of the cleaning water tank and the inlet of the flush toilet body can be prevented. Moreover, the two fixed points are respectively arranged on both sides of the front-to-back direction relative to the drain port, and the fixed point on the rear side is located at a position closer to the center side of the width direction of the flush toilet body than the center point of the drain port. Therefore, the cleaning water tank can be firmly fixed to the flush toilet body, and the force that attempts to push the cleaning water tank in the front-to-back direction can be fully resisted.

[0010] In the present invention, preferably, a seal for ensuring water tightness between the flush toilet body and the flush water tank is arranged between the flush toilet body and the flush water tank, and the seal is compressed by fixing the flush water tank to the flush toilet body at two fixing points.

[0011] According to the present invention thus constituted, a seal is arranged between the flush toilet body and the flush water tank, and the seal is compressed by fixing the flush water tank. Therefore, by arranging the fixing points in such a way that a straight line connecting the two fixing points passes through the drain port, the seal can be uniformly compressed, and the water tightness between the flush toilet body and the flush water tank can be improved.

[0012] In the present invention, it is preferable that the inlet of the flush toilet body is provided at a position lower than the inner edge upper surface of the flush toilet body and higher than the water level in the bowl of the flush toilet body.

[0013] According to the present invention thus constituted, the inlet of the flush toilet body is lower than the upper surface of the inner edge of the flush toilet body, so that the flush toilet device can be made low-profile. In addition, the inlet of the flush toilet body is higher than the water level in the bowl of the flush toilet body, so when the flush toilet device is not being cleaned, the inlet of the flush toilet body is not submerged in water, and deterioration of the seal can be suppressed.

[0014] In the present invention, preferably, further, an auxiliary fixing point for fixing the flush water tank to the flush toilet body is provided on the opposite side of the inlet of the flush toilet body with respect to the center line in the width direction of the flush toilet body.

[0015] According to the present invention thus constituted, the auxiliary fixing point is provided on the opposite side of the inlet of the flush toilet body relative to the center line of the flush toilet body in the width direction, so that the force that tends to push the flush water tank down in the width direction can be fully resisted and the flush water tank can be firmly fixed.

[0016] In the present invention, preferably, at least two auxiliary fixing points are provided, and at least one of the auxiliary fixing points is provided at a position higher than the inlet.

[0017] According to the present invention thus constructed, at least one of the auxiliary fixing points is arranged at a position higher than the inlet, so that the cleaning water tank can be fixed at a high position. When the force intended to push down the cleaning water tank acts on the upper part of the cleaning water tank, it can resist more strongly and can firmly fix the cleaning water tank.

[0018] In the present invention, preferably, the flushing water tank is composed of a flushing water tank body and a base plate, and the base plate is fixed to the flush toilet body via a plurality of fixing points and auxiliary fixing points.

[0019] According to the present invention thus constructed, the substrate constituting a part of the flush water tank is fixed to the flush toilet body via a plurality of fixing points and auxiliary fixing points, so that the position error of the fixing points formed on the flush toilet body can be absorbed by the substrate, and the flush water tank body can be installed in an appropriate position.

[0020] In the present invention, preferably, a radial sealing member is disposed between the cleaning water tank body and the substrate, and water tightness between the cleaning water tank body and the substrate is ensured by the radial sealing member.

[0021] According to the present invention thus constituted, a radial sealing member is disposed between the washing water tank body and the base plate, thereby ensuring water tightness between the washing water tank body and the base plate. In addition, since water tightness is ensured by the radial sealing member, compared with the case where a surface seal is disposed between the washing water tank body and the base plate, the sealing portion does not need to be thick, and the flush toilet device can be made low-profile.

[0022] In the present invention, preferably, the drain elbow conduit extends from the bowl to below the flush water tank, and the auxiliary fixing point is located on the opposite side of the inlet of the flush toilet body across the drain elbow conduit.

[0023] According to the present invention thus constituted, the flush water tank is fixed by the fixing point provided on the inlet side of the flush toilet body relative to the drainage trap pipe and the auxiliary fixing point provided on the opposite side of the inlet, so that the flush water tank can be fixed firmly with good balance.

[0024] Effects of the Invention

[0025] According to the flush toilet device of the present invention, the flush water tank can be arranged at the rear of the flush toilet body while achieving a low profile. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a top view showing the flush toilet device according to the embodiment of the present invention.

[0027] Figure 2 In the flush toilet device of the embodiment of the present invention, Figure 1 Side cross-sectional view of line II-II.

[0028] Figure 3 This is a block diagram showing a flush water supply system in a flush toilet apparatus according to an embodiment of the present invention.

[0029] Figure 4 This is an exploded perspective view showing a flush toilet body and a flush water tank in an exploded manner included in the flush toilet device according to the embodiment of the present invention.

[0030] Figure 5 It is a perspective view showing a base plate constituting a part of the flush water tank provided in the flush toilet apparatus according to the embodiment of the present invention.

[0031] Figure 6 This is a cross-sectional view showing an enlarged view of a connection portion between a flush toilet body and a flush water tank in a flush toilet device according to an embodiment of the present invention.

[0032] Description of Reference Numerals

[0033] 1: flush toilet device; 2: flush toilet body; 2a: bolt hole; 2b: inlet; 4: cleaning water supply device; 6: bowl; 8: drainage elbow pipeline; 8a: inlet; 8b: ascending pipeline; 8c: descending pipeline; 8d: top; 10: inner edge water outlet; 12: inner edge water guide; 14: jet water outlet; 16: jet water guide; 16a: upstream side flow path; 16b: curved flow path; 16c: downstream side flow path; 18: waste receiving surface; 20: inner edge; 21: platform; 22: bowl; 24: valve unit; 26: cleaning water tank; 26a: drainage outlet; 26b: hose connection; 28: water stopcock; 28a: water pipe fittings pipe; 30: constant flow valve; 32: solenoid valve for water supply to the water tank; 34: solenoid valve for water spouting from the inner edge; 35: controller; 35a: remote control; 36: drain valve; 36a: motor for toilet cleaning; 38: float switch; 40: vacuum interrupter; 42: cleaning water tank body; 44: base plate; 44a: drain opening; 44b: cutout; 44c, 44d: fixing hole (fixing point); 44e, 44f: auxiliary fixing hole (auxiliary fixing point); 44g: cylindrical part; 44h: upper surface recess; 44i: lower surface recess; 44j: water tank fixing part; 44k: water tank fixing part; 46: O-ring (radial sealing member); 48: seal; 50: bolt. DETAILED DESCRIPTION

[0034] Next, a flush toilet apparatus according to an embodiment of the present invention will be described with reference to the drawings.

[0035] Figure 1 It is a top view showing the flush toilet device according to the embodiment of the present invention. Figure 2 It is along Figure 1 Side cross-sectional view of line II-II.

[0036] like Figure 1 and Figure 2 As shown, the flush toilet device 1 of the embodiment of the present invention is a siphon water spray type flush toilet, comprising: a flush toilet body 2 made of ceramic; a toilet seat and toilet cover (not shown) made of resin, which are arranged on the upper surface of the flush toilet body 2; and a cleaning water supply device 4, which is arranged on the upper rear part of the flush toilet body 2 and is covered by a resin cover (not shown).

[0037] The flush toilet body 2 is formed with: a bowl 6 for receiving waste; a drainage elbow pipe 8, which is arranged at the bottom of the bowl 6 and is used to discharge waste by siphon action; an inner edge water spouting port 10 for inner edge water spouting; an inner edge water guide path 12 for guiding cleaning water to the inner edge water spouting port; a jet water spouting port 14 for jet spouting water; and a jet water guide path 16 for guiding cleaning water to the jet water spouting port 14.

[0038] The bowl portion 6 includes: a bowl-shaped waste receiving surface 18; an inner edge portion 20 formed along the upper edge portion of the bowl portion 6; and a platform portion 21 formed between the waste receiving surface 18 and the inner edge portion 20. In addition, the bowl portion 6 includes a bowl portion 22 formed in a region below the waste receiving surface 18 and connected to the drain elbow pipe 8. A water sealing surface W is formed inside the bowl portion 22.

[0039] The drainage trap pipe 8 includes an inlet 8a, an ascending pipe 8b extending upward from the inlet 8a, a descending pipe 8c extending downward from the ascending pipe 8b, and a top portion 8d located between the descending pipe 8c and the ascending pipe 8b and defining a sealing water level.

[0040] Here, the lower end of the descending conduit 8c of the drain trap conduit 8 is connected to a drain pipe (not shown) via a drain pipe sleeve (not shown).

[0041] When the flush toilet body 2 is viewed from the front, the rim spout 10 is formed at the left rear of the rim portion 20. The rim spout 10 spouts the cleaning water forward, and the cleaning water flows down to the waste receiving surface 18 while swirling on the inner peripheral surface of the rim portion 20 and the table surface of the table portion 21.

[0042] The rim conduit 12 is formed into a tapered shape with a flow path section gradually decreasing toward the rim spout 10. Wash water is supplied to the rim conduit 12 from the water pipe via the wash water supply device 4, and the wash water is spouted from the rim spout 10 by the water supply pressure of the water pipe.

[0043] The jet water spouting port 14 is formed at the bottom of the bowl portion 6. The jet water spouting port 14 is disposed opposite to the inlet portion 8a of the drain trap pipe 8 and faces the inlet portion 8a of the drain trap pipe 8. The jet water spouting port 14 spouts the washing water toward the inlet portion 8a of the drain trap pipe 8, and the washing water flows into the drain trap pipe 8 to start the siphon action.

[0044] The jet water conduit 16 includes an upstream flow path 16a extending forward from the washing water supply device 4, a curved flow path 16b curved from the upstream flow path, and a downstream flow path 16c extending backward from the curved flow path and connected to the jet water spout 14. Figure 3 ) supplies cleaning water to the jet water conduit 16, and the cleaning water is ejected from the jet water spouting port 14 by the water head pressure of the cleaning water.

[0045] Next, refer to Figures 3 to 6 Next, a flush water supply system included in the flush toilet device 1 according to the embodiment of the present invention will be described.

[0046] Figure 3This is a block diagram showing a flush water supply system in the flush toilet device 1 according to the embodiment of the present invention. Figure 4 It is an exploded perspective view showing the flush toilet body and the flush water tank which are included in the flush toilet device 1 according to the present embodiment in an exploded manner. Figure 5 It is a perspective view showing a base plate constituting a part of the flush water tank included in the flush toilet device 1 of the present embodiment.

[0047] Figure 6 This is a cross-sectional view showing an enlarged view of a connection portion between a flush toilet body and a flush water tank in the flush toilet device 1 of the present embodiment.

[0048] like Figure 3 As shown, the washing water supply device 4 is composed of a valve unit 24 for supplying and stopping washing water from a water pipe, and a resin washing water tank 26 for storing the washing water supplied via the valve unit 24 .

[0049] The valve unit 24 includes a constant flow valve 30, a tank water supply solenoid valve 32, a rim water spouting solenoid valve 34, and a controller 35 for controlling the tank water supply solenoid valve 32 and the rim water spouting solenoid valve 34. In addition, the wash water tank 26 includes a drain valve 36, a float switch 38, and a vacuum breaker 40.

[0050] In the present embodiment, the flush water tank 26 is a small resin tank having a capacity of about 2 liters. The lower portion of the flush water tank 26 is arranged below the upper surface of the inner edge portion 20 of the flush toilet body 2 and above the top 8d of the drainage trap pipe 8. Thus, the flush toilet device 1 becomes a low silhouette type toilet. In addition, in the present embodiment, the flush water in the flush water tank 26 is discharged from the jet water spout 14 due to gravity.

[0051] The stopcock 28 is configured to stop water supplied from the pipe 28a of the water pipe during maintenance, etc., and the tap water passing through the stopcock 28 flows as washing water into the valve unit 24. Therefore, the stopcock 28 is used in the "open" state during normal use.

[0052] The constant flow valve 30 is provided on the downstream side of the stopcock 28 and is configured to adjust the water supplied from the water pipe to a predetermined flow rate and make it flow out. The water flowing out of the constant flow valve 30 is branched and flows into the tank water supply electromagnetic valve 32 and the inner rim water spouting electromagnetic valve 34 respectively.

[0053] The tank water supply electromagnetic valve 32 is opened and closed according to the washing operation of the user, and the washing water flowing out of the tank water supply electromagnetic valve 32 flows into the washing water tank 26 and is stored.

[0054] The rim water spouting electromagnetic valve 34 is opened and closed according to the user's flushing operation, and the flushing water flowing out of the rim water spouting electromagnetic valve 34 is discharged from the rim water spouting port 10 of the flush toilet body 2 through the rim water conduit 12 .

[0055] Thus, the valve unit 24 including the tank water supply solenoid valve 32 and the rim water spouting solenoid valve 34 is configured to supply and stop flush water to the flush water tank 26 and to supply and stop flush water to the flush toilet body 2.

[0056] The controller 35 is configured to receive a control signal from a remote controller 35a operated by a user and to control the opening and closing of the tank water supply solenoid valve 32 and the rim water spouting solenoid valve 34. In addition, the controller 35 is configured to control the tank water supply solenoid valve 32 based on a detection signal from a float switch 38.

[0057] The drain valve 36 is provided at the bottom surface of the washing water tank 26, and is opened according to the washing operation of the user, so that the washing water stored in the washing water tank 26 is discharged from the inner edge water spout 10 through the jet water conduit 16. In addition, the drain valve 36 is configured to be pulled up from the drain port 26a by the toilet washing motor 36a provided at the upper part of the washing water tank 26, so that the drain port 26a is opened. The toilet washing motor 36a is configured to pull up the drain valve 36 at a predetermined timing according to the control signal from the controller 35 when the toilet is washed.

[0058] The float switch 38 is configured to detect the water level in the washing water tank 26 , and is configured to detect that the water level in the washing water tank 26 has reached a predetermined water storage level, and transmit a detection signal to the controller 35 .

[0059] The vacuum breaker 40 is disposed in the wash water tank 26 at a position above a predetermined water level, and is provided downstream of the rim water spouting electromagnetic valve 34 and upstream of the rim water conduit 12 .

[0060] Thus, when the inner rim water spouting electromagnetic valve 34 side becomes negative pressure, the atmosphere is sucked in from the vacuum breaker 40, and the washing water is prevented from flowing back from the inner rim water spouting port 10 side to the inner rim water spouting electromagnetic valve 34 side. In addition, when the washing water flows back from the inner rim water spouting port 10 side, the backflowing washing water flows out from the vacuum breaker 40 and flows into the washing water tank 26.

[0061] Next, refer to Figures 4 to 6 , the installation structure of the cleaning water tank is explained.

[0062] like Figure 4 As shown, the flush water tank 26 is disposed on the rear upper surface of the flush toilet body 2. The flush water tank 26 is composed of a flush water tank body 42 and a base plate 44 for fixing the flush water tank body 42 to the flush toilet body 2.

[0063] The base plate 44 is mounted on the flush water tank body 42 in a manner that surrounds the lower portion of the flush water tank body 42. On the other hand, four bolt holes 2a are provided on the rear upper surface of the flush toilet body 2. The base plate 44 is fastened by bolts 50 ( Figure 6 ), fixed to the flush toilet body 2. Furthermore, the flush water tank 26 is fixed to the flush toilet body 2 by fixing the flush water tank body 42 to the base plate 44 fixed to the flush toilet body 2. That is, the base plate 44 is provided with water tank fixing parts 44j, 44k, and the flush water tank body 42 of the flush water tank 26 is fixed to the base plate 44 via the water tank fixing parts 44j, 44k. These water tank fixing parts 44k, 44j are provided near the fixing holes 44c, 44d and on both sides of the drainage opening 44a in a plan view. In this way, the flush water tank 26 is fixed to the flush toilet body 2 via the base plate 44.

[0064] Furthermore, an inlet 2b is formed on the rear upper surface of the flush toilet body 2. The inlet 2b is connected to the jet water conduit 16 formed inside the flush toilet body 2, and the washing water flowing in from the inlet 2b passes through the jet water conduit 16 and is discharged from the jet water spout. In addition, the inlet 2b is provided at a position eccentric to one side with respect to the center line C in the width direction of the flush toilet body 2, and in the present embodiment, is provided at a position eccentric to the right with respect to the center line C. It should be noted that a drainage bend pipe 8 is provided on the center line C in the width direction of the flush toilet body 2, and its upper part is raised from the rear upper surface of the flush toilet body 2. That is, the drainage bend pipe 8 extends from the bowl 6 to the lower side of the washing water tank 26, and the inlet 2b is eccentrically provided on the right side in the width direction of the flush toilet body 2 to avoid the drainage bend pipe 8.

[0065] In addition, when the flush water tank 26 is fixed to the flush toilet body 2, the inlet 2b is located at the drain port 26a ( Figure 3 ), the washing water discharged from the drain port 26a flows directly into the jet water conduit 16 through the inlet 2b. That is, the washing water tank 26 discharges the stored washing water from the drain port 26a and causes it to flow into the inlet 2b of the flush toilet body 2. Moreover, the inlet 2b is provided on the upper surface of the rear portion of the flush toilet body 2 at a height H ( Figure 2 )) is lower than the water level (height of the sealing surface W) in the bowl 6. Therefore, in a state where the flush toilet device 1 is not flushing the toilet, the inlet 2b is not immersed in flush water.

[0066] Then, if Figure 4 and Figure 5As shown, the base plate 44 is a resin member having a box shape as a whole, and is configured to receive the lower portion of the washing water tank body 42 from above.

[0067] The bottom surface of the base plate 44 is provided with a circular drainage opening 44a at a position matching the drainage port 26a of the flush water tank 26 and a cutout 44b provided to avoid the drainage trap pipe 8 protruding on the upper surface of the rear portion of the flush toilet body 2.

[0068] Furthermore, fixing holes 44c and 44d as fixing points and auxiliary fixing holes 44e and 44f as auxiliary fixing points are provided on the bottom surface of the base plate 44. The positions of these fixing holes 44c and 44d and the auxiliary fixing holes 44e and 44f match the positions of the four bolt holes 2a provided on the flush toilet body 2. That is, the bolts 50 ( Figure 6 ) Pass the fixing holes 44c, 44d and the auxiliary fixing holes 44e, 44f, and fix the bolts 50 to the bolt holes 2a of the flush toilet body 2 respectively, so that the base plate 44 can be installed on the flush toilet body 2.

[0069] Then, the fixing holes 44c, 44d of the base plate 44 and the positions of the bolt holes 2a corresponding thereto become fixing points, and the auxiliary fixing holes 44e, 44f and the positions of the bolt holes 2a corresponding thereto become auxiliary fixing points. That is, in this embodiment, the base plate 44 is mounted on the rear upper surface of the flush toilet body 2 at two fixing points (the positions of the fixing holes 44c, 44d) and two auxiliary fixing points (the positions of the auxiliary fixing holes 44e, 44f).

[0070] Here, the fixing holes 44c and 44d as fixing points are provided on the right side in the width direction of the flush toilet body 2, and are respectively arranged on both sides in the front-rear direction of the flush toilet body 2 with respect to the drain port 26a (drain opening 44a). In addition, the two fixing holes 44c and 44d are arranged so that a straight line connecting their center points passes through the drain port 26a (drain opening 44a) in a plan view. Moreover, the rear fixing hole 44d of the two fixing holes 44c and 44d is located at a position closer to the center side in the width direction of the flush toilet body 2 than the center point O of the drain port 26a (drain opening 44a).

[0071] On the other hand, the auxiliary fixing holes 44e and 44f as auxiliary fixing points are respectively provided on the opposite side of the inlet 2b of the flush toilet body 2 with respect to the center line C in the width direction of the flush toilet body 2 (in the present embodiment, on the left side with respect to the center line C). That is, the auxiliary fixing holes 44e and 44f (auxiliary fixing points) are located on the opposite side of the inlet 2b of the flush toilet body 2 across the drainage trap pipe 8. In addition, the bottom surface of the base plate 44 is configured so that the left front portion thereof becomes higher, and the auxiliary fixing hole 44e provided in the higher portion of the bottom surface of the base plate 44 is provided at a position higher than the inlet 2b of the flush toilet body 2.

[0072] That is, Figure 4 As shown in FIG. 1 , among the four bolt holes 2a of the flush toilet body 2, the two bolt holes 2a provided on the right side of the flush toilet body 2 and the bolt hole 2a provided on the left rear side are provided at substantially the same height as the inlet 2b of the flush toilet body 2. In contrast, the bolt hole 2a provided on the left front side of the flush toilet body 2 is provided at a position higher than the other three bolt holes 2a. Therefore, the front auxiliary fixing hole 44e of the two auxiliary fixing holes 44e and 44f provided on the base plate 44 is provided at a position higher than the inlet 2b of the flush toilet body 2.

[0073] Next, refer to Figure 6 , the installation structure of the cleaning water tank 26 to the flush toilet body 2 is described.

[0074] like Figure 6 As shown, a circular protrusion 42a protruding downward is provided on the bottom surface of the cleaning water tank body 42 constituting the cleaning water tank 26, and the inner side of the circular protrusion 42a constitutes a drain port 26a of the cleaning water tank 26. The diameter of the drain port 26a is formed to be substantially the same as the diameter of the drain opening 44a formed on the substrate 44, and the drain port 26a and the drain opening 44a are smoothly connected. Then, a groove 42b is formed on the outer peripheral surface of the protrusion 42a, and a circular O-ring 46 as a radial sealing member is embedded in the groove 42b.

[0075] On the other hand, a cylindrical portion 44g protruding downward is provided on the bottom surface of the substrate 44 so as to surround the drain opening 44a. In addition, an annular upper surface recess 44h is formed on the upper side of the bottom surface of the substrate 44 so as to surround the drain opening 44a. On the other hand, an annular lower surface recess 44i is formed on the lower side of the bottom surface of the substrate 44 so as to surround the cylindrical portion 44g.

[0076] Furthermore, the protrusion 42a protruding from the bottom surface of the washing water tank body 42 is received in the upper surface recess 44h formed on the upper surface of the substrate 44. In this way, by fitting the protrusion 42a of the washing water tank body 42 into the upper surface recess 44h of the substrate 44, the O-ring 46 disposed on the outer periphery of the protrusion 42a is flattened in the radial direction of the drain port 26a, and the washing water tank body 42 and the substrate 44 are sealed. In this specification, a sealing member that seals by being flattened in the radial direction is referred to as a "radial sealing member".

[0077] On the other hand, a seal 48 is arranged in the annular lower surface recess 44i formed on the lower surface of the base plate 44. The seal 48 is formed in an annular shape as a whole, is embedded around the cylindrical portion 44g formed on the inner periphery of the lower surface recess 44i, and is received in the lower surface recess 44i. Figure 5 ) and tighten the bolt 50( Figure 6 ) is fixed to the bolt hole 2a of the flush toilet body 2 ( Figure 4 ), whereby the substrate 44 is fixed to the rear upper surface of the flush toilet body 2. At this time, the seal 48 disposed on the lower surface recess 44i of the lower surface of the substrate 44 is compressed between the substrate 44 and the flush toilet body 2. That is, in a state where the flush water tank 26 is fixed to the flush toilet body 2, the seal 48 is sandwiched between the lower surface recess 44i of the substrate 44 and the peripheral edge of the inlet 2b of the flush toilet body 2 and is flattened. It should be noted that in this embodiment, the seal 48 is a surface seal that is flattened in the direction of the central axis of the drain port 26a of the flush water tank 26 to perform sealing.

[0078] Here, the seal 48 is compressed by fixing the cleaning water tank 26 to the flush toilet body 2 at two fixing points (fixing holes 44c, 44d). In addition, the fixing holes 44c, 44d are respectively arranged on both sides of the drain port 26a in the front-back direction, and are arranged so that the straight line connecting them passes through the drain port 26a when viewed from above. Therefore, the seal 48 arranged in the portion of the drain port 26a can be reliably compressed, and water tightness can be reliably ensured. In this way, the seal 48 is arranged between the flush toilet body 2 and the cleaning water tank 26 to ensure water tightness between them.

[0079] Next, refer to Figure 1 and Figure 3 , the function of the flush toilet device 1 according to the embodiment of the present invention will be described.

[0080] First, when the user operates the toilet cleaning switch (not shown) provided in the remote controller 35a, a cleaning instruction signal is sent to the controller 35. When receiving the cleaning instruction signal, the controller 35 sends a control signal to the inner rim water spouting electromagnetic valve 34 of the valve unit 24, so that the inner rim water spouting electromagnetic valve 34 is opened. As a result, the cleaning water supplied from the tap water pipe passes through the inner rim water spouting electromagnetic valve 34, the vacuum breaker 40, and the inner rim water conduit 12 and is discharged from the inner rim water spouting port 10. The cleaning water discharged from the inner rim water spouting port 10 forms a swirling flow on the waste receiving surface 18 of the bowl portion 6, and the waste receiving surface 18 is cleaned.

[0081] After the inner edge water spouting electromagnetic valve 34 is opened, when a predetermined time has passed, the controller 35 sends a control signal to the toilet cleaning motor 36a, and the toilet cleaning motor 36a pulls up the drain valve 36. As a result, the drain valve 36 is opened, and the washing water stored in the washing water tank 26 flows from the drain port 26a of the washing water tank 26 to the inlet 2b of the flush toilet body 2, and passes through the jet water conduit 16 and is discharged from the jet water spouting port 14. The spouting of water from the jet water spouting port 14 causes a siphon phenomenon in the drain bend pipe 8, and the washing water and waste in the bowl 6 pass through the drain bend pipe 8 and are discharged.

[0082] The controller 35 also sends a control signal to the tank water supply electromagnetic valve 32 of the valve unit 24 to open the valve. Thus, the washing water supplied from the water pipe passes through the tank water supply electromagnetic valve 32 and is supplied to the washing water tank 26 .

[0083] When the water level in the washing water tank 26 drops to a predetermined level, the drain port 26a is closed by the drain valve 36, and the water spouting from the jet water spouting port 14 stops. After the drain port 26a is closed, the rim water spouting electromagnetic valve 34 remains in an open state, and the washing water supplied from the water pipe is discharged from the rim water spouting port 10. When the water level in the bowl 6 rises to a predetermined level by the spouting from the rim water spouting port 10, and the water replenishment is completed, the controller 35 sends a control signal to the rim water spouting electromagnetic valve 34 of the valve unit 24, and closes the valve.

[0084] On the other hand, after the drain valve 36 is closed, the tank water supply electromagnetic valve 32 is still in the open state, so the water level in the washing water tank 26 rises due to the washing water flowing into the washing water tank 26 .

[0085] When the water level in the cleaning water tank 26 rises to a predetermined water storage level, the float switch 38 senses this and sends a sensing signal to the controller 35. Upon receiving the sensing signal from the float switch 38, the controller 35 sends a control signal to the water tank water supply solenoid valve 32 to close the valve. Thus, the water supply to the cleaning water tank 26 is completed, and one toilet cleaning is completed.

[0086] According to the flush toilet device 1 of the embodiment of the present invention, the inlet 2b of the flush toilet body 2 is provided at a position eccentric to one side with respect to the center line C in the width direction of the flush toilet body 2 ( Figure 4 ), the inlet 2b can be provided in the flush toilet body 2 to avoid the drain trap conduit 8 extending from the bowl 6. As a result, the inlet 2b can be formed at a low position, and the flush toilet device 1 can be made low-profile.

[0087] In addition, the fixing holes 44c and 44d ( Figure 5 ) passes through the drain port 26a (drain opening 44a) when viewed from above, so the position of the flush water tank 26 near the drain port 26a can be firmly defined. Therefore, water leakage between the drain port 26a (drain opening 44a) of the flush water tank 26 and the inlet 2b of the flush toilet body 2 can be prevented.

[0088] Furthermore, the two fixing holes 44c and 44d are respectively arranged on both sides of the drain port 26a (drain opening 44a) in the front-rear direction, and the fixing hole 44d on the rear side is located closer to the center side of the width direction of the flush toilet body 2 than the center point of the drain port 26a. Therefore, the flush water tank 26 can be firmly fixed to the flush toilet body 2, and the force that attempts to push the flush water tank 26 in the front-rear direction can be fully resisted.

[0089] Furthermore, according to the flush toilet device 1 of this embodiment, a seal 48 is disposed between the flush toilet body 2 and the flush water tank 26, and the seal 48 is compressed by fixing the flush water tank 26 ( Figure 6 ). Therefore, by connecting the fixing holes 44c and 44d ( Figure 5 ) is arranged in a straight line passing through the drain outlet 26a, which can evenly compress the seal 48 and improve the water tightness between the flush toilet body 2 and the cleaning water tank 26.

[0090] Furthermore, according to the flush toilet device 1 of this embodiment, the inlet 2b of the flush toilet body 2 is lower than the upper surface (inner edge upper surface) of the inner edge portion 20 of the flush toilet body 2 ( Figure 4 ), so that the flush toilet device 1 can be made low-profile. In addition, the inlet 2b of the flush toilet body 2 is higher than the water level of the accumulated water W in the bowl 6 of the flush toilet body 2, so when the flush toilet device 1 is not cleaned, the inlet 2b of the flush toilet body 2 is not submerged in water, and the deterioration of the seal 48 can be suppressed.

[0091] Furthermore, according to the flush toilet device 1 of the present embodiment, auxiliary fixing holes 44e, 44f are provided as auxiliary fixing points on the opposite side of the inlet 2b of the flush toilet body 2 with respect to the center line C in the width direction of the flush toilet body 2. Figure 5 ), so it can fully resist the force that attempts to push the cleaning water tank 26 down in the width direction, and can firmly fix the cleaning water tank 26.

[0092] Furthermore, according to the flush toilet apparatus 1 of the present embodiment, the auxiliary fixing hole 44e of the auxiliary fixing holes 44e and 44f is provided at a position higher than the inlet 2b ( Figure 5 ), so the cleaning water tank 26 can be fixed at a high position, and when the force to push down the cleaning water tank 26 acts on the upper part of the cleaning water tank 26, it can resist more strongly and can firmly fix the cleaning water tank 26.

[0093] Furthermore, according to the flush toilet device 1 of the present embodiment, the base plate 44 constituting a part of the flush water tank 26 is fixed to the flush toilet body 2 via a plurality of fixing holes 44c, 44d and auxiliary fixing holes 44e, 44f, so that the position error of the bolt hole 2a serving as a fixing point formed on the flush toilet body 2 can be absorbed by the base plate 44, and the flush water tank body 42 can be installed at an appropriate position.

[0094] Furthermore, according to the flush toilet device 1 of this embodiment, an O-ring 46 ( Figure 6 ), so that the water tightness between the washing water tank body 42 and the base plate 44 can be ensured. In addition, since the water tightness is ensured by the O-ring 46, compared with the case where a face seal is arranged between the washing water tank body 42 and the base plate 44, the sealing portion does not need to be thick, and the flush toilet device 1 can be made low-profile.

[0095] Furthermore, according to the flush toilet device 1 of the present embodiment, the flush water tank 26 is fixed by the fixing holes 44c, 44d of the base plate 44 provided on the inlet 2b side of the flush toilet body 2 relative to the drainage bend pipe 8 and the auxiliary fixing holes 44e, 44f provided on the opposite side of the inlet 2b, so that the flush water tank 26 can be fixed firmly in a well-balanced manner.

[0096] The embodiment of the present invention has been described above, but various modifications may be made to the above embodiment. In particular, in the above embodiment, the cleaning water tank 26 is composed of the cleaning water tank body 42 and the base plate 44, but the cleaning water tank 26 may be composed of a single member.

Claims

1. A flush toilet device, which is cleaned by washing water stored in a washing water tank, characterized in that: have: A flush toilet body having a bowl and a drainage elbow pipe extending from the bowl; and The flush water tank is fixed to the rear of the flush toilet body via at least two fixing points, and discharges the stored flush water from the drain port to flow into the inlet of the flush toilet body. The inlet of the flush toilet body is arranged at a position eccentric to one side with respect to the center line of the flush toilet body in the width direction. Two of the fixing points are disposed at both sides of the drain port in the front-rear direction, and are disposed so that a straight line connecting the two fixing points passes through the drain port when viewed from above. The rear fixing point of the two fixing points is located closer to the center of the flush toilet body in the width direction than the center of the drain outlet.

2. The flush toilet device according to claim 1, wherein: A seal for ensuring water tightness between the flush toilet body and the flush water tank is disposed between the flush toilet body and the flush water tank, and the seal is compressed by fixing the flush water tank to the flush toilet body at the two fixing points.

3. The flush toilet device according to claim 1, wherein: The inlet of the flush toilet body is provided at a position lower than the inner edge upper surface of the flush toilet body and higher than the water level of the accumulated water in the bowl of the flush toilet body.

4. The flush toilet device according to claim 1, wherein: Furthermore, an auxiliary fixing point for fixing the flush water tank to the flush toilet body is provided on the opposite side of the inlet of the flush toilet body with respect to the center line of the flush toilet body in the width direction.

5. The flush toilet device according to claim 4, wherein: At least two auxiliary fixing points are provided, and at least one of the auxiliary fixing points is provided at a position higher than the inlet.

6. The flush toilet device according to claim 4, wherein: The flushing water tank is composed of a flushing water tank body and a base plate, and the base plate is fixed to the flush toilet body via the plurality of fixing points and the auxiliary fixing points.

7. The flush toilet device according to claim 6, wherein: A radial sealing component is arranged between the cleaning water tank body and the substrate, and the water tightness between the cleaning water tank body and the substrate is ensured by the radial sealing component.

8. The flush toilet device according to claim 4, wherein: The drainage bend pipe extends from the bowl to below the flushing water tank, and the auxiliary fixing point is located on the opposite side of the inlet of the flush toilet body across the drainage bend pipe.

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