Flush toilet

Abstract

To provide a flush toilet capable of increasing strength of an entire toilet body and ensuring a large storage area for a functional unit in a toilet body while suppressing external dimensions of the entire toilet body.SOLUTION: A disclosed flush toilet 1 has a ceramic toilet body 4 and a functional unit 6. The ceramic toilet body includes: a skirt part 42; and a rear functional storage part V0 that allows at least a part of the functional unit to be stored. The rear functional storage part has a support wall 48 that divides the storage area up and down and supports the functional unit. The skirt part forms a double wall portion E including an outer wall portion 42c and an inner wall portion 42d. In the double wall portion, at least a part thereof forms an inner space I between the outer wall and the inner wall. The skirt part includes a single wall section A with the internal space of the double wall section removed in an upper end above a junction 48d between the double wall and the support wall.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a flush toilet, and more particularly to a flush toilet that is flushed with flush water to expel waste. [Background technology]

[0002] Conventionally, as a flush toilet that is flushed with flushing water to expel waste, there has been known a flush toilet known as a "full skirt type" or "full skirt type" in which a skirt section is formed outside the respective sides of the bowl section and the drain trap section of the ceramic toilet body, and which extends around the entire circumference of the toilet body, as described in Patent Documents 1-3, for example. In such conventional "full skirt type" or "full skirt type" flush toilets, a storage area capable of storing functional parts including the function of controlling the discharge and stopping of flush water into the bowl portion of the toilet body is provided in an area rearward of the bowl portion of the toilet body. Furthermore, in the conventional flush toilet described in Patent Document 1, the side wall of the skirt portion forms a double wall portion, with an outer wall portion that forms its outer surface, and an inner wall portion that is provided on the inside of this outer wall portion. The side wall portion of the skirt portion has a double wall structure, and forms an internal space between the outer wall portion and the inner wall portion of this double wall portion, and is joined to a support wall portion that supports the functional part within the storage area of ​​the functional part of the toilet main body. Next, in the conventional flush toilet described in Patent Document 2, the side wall of the skirt part that forms the storage area for the functional part behind the bowl part of the toilet body forms a double wall part with an outer wall part that forms its outer surface and an inner wall part that is provided on the inside of this outer wall part, and also forms an internal space between the outer wall part and the inner wall part. Also, the upper part of the double wall part of the skirt part is a single wall part with the internal space between the inner wall part and the outer wall part eliminated. Furthermore, in the conventional flush toilet described in Patent Document 3, the support wall provided in the storage area of ​​the functional part of the toilet body extends horizontally from the joint with the drain trap to the skirt parts on both the left and right sides. Both left and right ends of this support wall are joined to the single wall parts of the side walls of the left and right skirt parts, respectively, but a double wall part is formed in the side wall part of the skirt part below this joint. In other words, both left and right ends of the support wall are supported by the single wall part above the joint with the skirt part, and by the double wall part below the joint with the skirt part. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6691659 (JP 2017-89282 A) [Patent Document 2] JP 2020-169538 A [Patent Document 3] JP 2014-114633 A Summary of the Invention [Problem to be solved by the invention]

[0004] Meanwhile, in recent years, with the diversification of flush toilet designs and improvements in the aesthetic appeal of flush toilets, one of the issues being addressed is how to make the overall external dimensions of the toilet body smaller (slimmer), while still ensuring a large storage area for storing functional parts in the area rearward of the bowl portion of the toilet body. However, for example, in the conventional flush toilet described in Patent Document 1 mentioned above, the double wall portion of the side wall of the skirt portion is joined to the support wall portion of the storage area of ​​the functional portion, ensuring a storage area strong enough to withstand the weight of the functional portion; however, there is a problem in that the storage area for the functional portion is reduced and narrowed due to the thick structure of the double wall portion in the entire area of ​​the side wall of the skirt portion from the bottom to the top. Furthermore, in the conventional flush toilet described in Patent Document 2 mentioned above, the support wall portion of the storage area for the functional part in the toilet body is not joined to the double wall portion of the side wall portion of the skirt part, which causes the support wall portion supporting the functional part to lack strength, making it prone to deformation such as distortion. Furthermore, in the conventional flush toilet described in Patent Document 3 mentioned above, the area of ​​the skirt part below the joint between the support wall part provided in the storage area of ​​the functional part and the side walls of the left and right skirt parts is a double wall part, but the area of ​​the skirt part above the joint between the support wall part and the side walls of the left and right skirt parts is a single wall part. This means that the storage area for the functional part cannot be secured in the area below the horizontal support wall part, and is concentrated in the area above the horizontal support wall part, creating the problem that it is difficult to secure a large storage area for the functional part in the upper and lower areas. In addition, since the storage area concentrated in the area above the support wall is surrounded by a single wall portion of the side wall portion of the skirt, depending on the weight of the functional parts stored in the storage area, there is a risk that it may not be strong enough, and there is a problem that deformation such as distortion of the support wall or skirt portion may affect the external shape of the toilet body.

[0005] Therefore, the present invention has been made to solve the problems and issues of the prior art mentioned above, and has an object to provide a flush toilet that can ensure a large storage area for functional parts in the toilet body while reducing the external dimensions of the entire toilet body, and that can increase the strength of the entire toilet body. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the present invention provides a flush toilet that is flushed with flush water to discharge waste, the flush toilet having a ceramic toilet body equipped with a bowl portion for receiving waste, and a drain trap portion having an inlet portion connected to the lower part of the bowl portion to discharge the waste within the bowl portion, and a functional portion that is provided rearward of the bowl portion of the toilet body and has the function of controlling the discharge and stopping of flush water into the bowl portion, the ceramic toilet body further comprising a skirt portion formed outside the respective side surfaces of the bowl portion and the drain trap portion, and a skirt portion that is provided below the upper end of the skirt portion and inside the skirt portion in the area rearward of the bowl portion to control at least a part of the functional portion. and a rear functional storage section that can store therein items such as the functional section, the rear functional storage section having a support wall section that divides the storage area into upper and lower sections and supports the functional section, the skirt section forming a double wall section having an outer wall section that forms its outer surface and an inner wall section that is provided on the inside of the outer wall section, at least a portion of the double wall section forming an internal space between the outer wall section and the inner wall section, the support wall section being supported by being joined to the double wall section of the skirt section, and the skirt section having a single wall section from which the internal space of the double wall section has been eliminated at an upper end portion above the joint between the double wall section and the support wall section. In the present invention configured in this manner, the support wall portion which divides the storage area of ​​the rear functional storage section into upper and lower portions and supports the functional section is supported by being joined to the double wall portion of the skirt section, thereby enabling the strength of the support wall portion and the skirt portion to be mutually improved. In addition, in the skirt portion, the upper end portion above the joint between the double wall portion and the support wall portion has a single wall portion in which the internal space of the double wall portion has been eliminated, so that a larger storage area can be secured within the rear functional storage portion while maintaining the strength of the rear functional storage portion from the joint between the double wall portion and the support wall portion of the skirt portion to the upper end portion above it. Therefore, while suppressing the overall external dimensions of the toilet body, a large storage area for the functional part in the toilet body can be secured, and the strength of the entire toilet body can be increased.

[0007] In the present invention, preferably, the skirt portion comprises a first skirt portion formed from the double wall portion from its lower end to its upper end, and a second skirt portion formed from the double wall portion from the lower end of the skirt portion to a predetermined upper position and formed from the single wall portion from the predetermined upper position to the upper end of the skirt portion. In the present invention configured in this manner, for example, if the entire area above the joint between the skirt portion and the support wall portion is set as a single wall portion, a larger storage area can be secured within the rear functional storage portion. However, this raises the problem that during manufacturing, some of the single wall portion of the skirt portion, etc., may be prone to deformation such as distortion due to insufficient strength. Therefore, in the present invention, by combining a first skirt portion formed of a double wall portion from the lower end to the upper end of the skirt portion, and a second skirt portion formed of a double wall portion from the lower end of the skirt portion to a predetermined upper position and also formed of a single wall portion from the predetermined upper position to the upper end of the skirt portion, it is possible to suppress deformation such as distortion of the double wall portion and single wall portion of the skirt portion during manufacturing, and to ensure a larger storage area for the rear functional storage portion while eliminating the lack of strength.

[0008] In the present invention, the first skirt portion is preferably provided at a joint where the bowl portion of the toilet body and the rear functional storage portion are joined. In the present invention configured in this manner, the joint where the bowl portion of the ceramic toilet body and the rear functional storage portion are joined is generally a location that is prone to loads such as stress concentration due to the weight of the bowl portion itself and the weight of the functional portion stored in the rear functional storage portion. Therefore, even during manufacturing or transportation of the toilet body, if internal or external forces or other loads are applied to the joint between the bowl portion and the rear functional storage portion, the toilet body may be damaged. Therefore, in the present invention, a first skirt portion formed of a double wall portion from the lower end to the upper end of the skirt portion is joined to the joint between the bowl portion of the toilet body and the rear functional storage portion, and the strength of the joint between the bowl portion and the rear functional storage portion can also be improved by the double wall portion of the first skirt portion. Therefore, it is possible to overcome the lack of strength of the rear functional storage section and ensure a larger storage area.

[0009] In the present invention, preferably, the rear functional storage section includes the joint between the bowl portion of the toilet body and the rear functional storage section, and the joint between the drain trap portion and the support wall portion, and has a front region that is positioned forward of the drain core, which is the center of the pipeline on the outlet side of the drain trap portion, and a rear region that is positioned rearward of the front region, and the double wall portion of the first skirt portion is provided in the front region of the rear functional storage section, and the single wall portion of the second skirt portion is provided in the rear region of the rear functional storage section. In the present invention configured in this manner, the double wall portion of the first skirt portion is provided in a front region of the rear functional storage portion which includes the joint between the bowl portion of the toilet body and the rear functional storage portion, and the joint between the drain trap portion and the support wall portion, and which is positioned forward of the drain core, which is the center of the pipeline on the outlet side of the drain trap portion.Therefore, the joint between the bowl portion and the front region of the rear functional storage portion can be supported by the double wall portion of the first skirt portion, and the double wall portion of the first skirt portion can also support the support wall portion that supports the drain trap portion. Therefore, the strength of the first skirt portion itself in the forward region of the rear functional storage portion can be improved by the double wall portion, and the supporting force when the first skirt portion supports the joint between the bowl portion and the rear functional storage portion can also be reinforced. In addition, since the strength of the first skirt portion itself in the forward region of the rear functional storage portion is reinforced by the double wall portion, the supporting force when the first skirt portion supports the drain trap portion via the support wall portion can also be reinforced. Furthermore, the first skirt portion in the front region of the rear functional storage portion, including the joint with the bowl portion and the joint between the drain trap portion and the support wall portion, can have a thicker structure than the single wall structure of the second skirt portion in the rear region of the rear functional storage portion, due to its double wall structure. As a result, when moving the toilet body during transportation or installation, workers can easily hold the structural portion of the double wall portion of the first skirt portion, which is thicker than the single wall portion of the second skirt portion, and can be prevented from holding the single wall portion of the second skirt portion, which is weaker than the structural portion of the double wall portion of the first skirt portion.

[0010] In the present invention, preferably, the double wall portion of the first skirt portion is inclined at a substantially constant inclination angle so that the wall surface of the inner wall portion spreads outward from the lower side to the upper side of the rear functional storage portion, The second skirt portion is inclined in two steps so that the wall surface of the inner wall portion of the double wall portion widens outward from below toward above. In the present invention configured in this manner, the wall surface of the inner wall portion of the double wall section of the first skirt section is inclined at a substantially constant angle so as to expand outward from below to above the rear functional storage section, making it less likely for deformation such as distortion to occur. In addition, with regard to the second skirt portion, the wall surface of the inner wall portion of the double wall section is inclined in two stages so as to widen outward from the bottom to the top, thereby enabling a larger storage area to be secured within the rear functional storage section. Furthermore, the wall surface at a constant inclination angle on the inner wall portion of the double wall portion of the first skirt portion and the wall surface at a two-stage inclination on the inner wall portion of the double wall portion of the second skirt portion make it possible to increase the difference in thickness between the structural portion of the double wall portion of the first skirt portion and the structural portion of the single wall portion of the second skirt portion. Therefore, when moving the toilet body during transportation or installation, workers can easily hold the structural portion of the double wall portion of the first skirt portion, which is thicker than the single wall portion of the second skirt portion, and can avoid having to hold the single wall portion of the second skirt portion, which is weaker in strength than the structural portion of the double wall portion of the first skirt portion.

[0011] In the present invention, preferably, in a first inclination stage, the second skirt portion is inclined at a first inclination angle identical to the inclination angle of the inner wall portion of the first skirt portion so that the wall surface of the inner wall portion of the double wall portion spreads outward from the joint with the lower support wall portion toward an upward deflection position, and then, in a second inclination stage, is inclined at a second inclination angle greater than the first inclination angle so that the wall surface spreads outward from the deflection position toward the upper single wall portion. In the present invention configured in this manner, in the first inclination stage, the second skirt portion is inclined at a first inclination angle that is the same as the inclination angle of the inner wall portion of the first skirt portion so that the wall surface of the inner wall portion of the double wall portion spreads outward from the joint with the lower support wall portion toward the upward deflection position, and since the first stage inclinations of the double wall portion and the single wall portion are the same, in the region from the joint with the lower support wall portion to the upward deflection position, the wall surfaces of the inner wall portions of the double wall portions of the first and second skirt portions are formed smoothly and without any steps. Therefore, deformation such as steps or distortion is less likely to occur in the first skirt portion and the second skirt portion near the joint with the support wall portion, thereby preventing a lack of strength in the rear functional storage portion. In addition, in the second inclination stage, the second skirt portion is inclined at a second inclination angle greater than the first inclination angle so as to spread outward from the deflected position of the inner wall portion of the double wall portion toward the upper single wall portion, and the inclination of the second inclination angle of the second skirt portion in the second inclination stage can be shaped to spread outward toward the upper single wall portion with the deflected position of the double wall portion as a base end. This makes it possible to ensure a larger storage area within the rear functional storage section while suppressing a lack of strength in the transition section where the double wall section transitions to the single wall section in the second inclination stage of the second skirt section. Effect of the Invention

[0012] According to the flush toilet of the present invention, it is possible to reduce the external dimensions of the entire toilet body while ensuring a large storage area for functional parts in the toilet body and to increase the strength of the entire toilet body. [Brief description of the drawings]

[0013] [Figure 1] 1 is an overall configuration diagram of a flush toilet according to an embodiment of the present invention. [Diagram 2] FIG. 1 is a plan view of a flush toilet according to an embodiment of the present invention. [Diagram 3] FIG. 1 is an exploded perspective view of a flush toilet according to an embodiment of the present invention, viewed from behind and diagonally above. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Diagram 5] FIG. 3 is a cross-sectional view taken along line VV in FIG. [Figure 6] FIG. 3 is a cross-sectional view taken along line VI-VI in FIG. [Figure 7] FIG. 3 is a cross-sectional view taken along line VII-VII in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] A flush toilet according to one embodiment of the present invention will now be described with reference to the accompanying drawings. First, the overall structure of a flush toilet according to one embodiment of the present invention will be explained generally with reference to Figs. 1 to 3. Fig. 1 is a diagram showing the overall configuration of a flush toilet according to one embodiment of the present invention. Fig. 2 is a plan view of a flush toilet according to one embodiment of the present invention. Fig. 3 is an exploded perspective view of a flush toilet according to one embodiment of the present invention, seen from behind and diagonally above. As shown in Figures 1 to 3, a flush toilet 1 according to one embodiment of the present invention comprises a water supply passage (main water supply passage 2) through which flush water supplied from a main water supply source W0 such as a water line passes, a ceramic toilet body 4, and a flush water supply device 6.

[0015] Next, as shown in Figures 1 to 3, the toilet body 4 comprises a bowl portion 8 for receiving waste, a rim portion 10 formed on the upper edge of the bowl portion 8, and a drain trap portion 12 extending from the bottom of the bowl portion 8. 1 to 3, the flush water supply device 6, details of which will be described later, is provided rearward of the bowl portion 8 of the toilet body 4, and is a functional part that enables flush water supplied from the main water supply passage 2 to be supplied to the toilet body 4. More specifically, this functional part is powered by electricity, and includes a function for controlling the stop of the discharge of flush water into the bowl portion 8 of the toilet body 4.

[0016] Next, as shown in FIG. 2, a rim water channel 14 is formed inside the rim portion 10 on one of the left and right sides of the toilet body 4 (the right side when looking at the toilet body 4 from the front side). This rim water conduit 14 extends from the rear side of the toilet body 4 towards the front inside the rim section 10 on one of the left and right sides of the toilet body 4 (the right side when looking at the toilet body 4 from the front side), and then bends towards the rear halfway, forming a so-called U-turn shape. A rim spout 14a is provided at the downstream end of this rim water conduit 14 (the downstream rear end). Furthermore, the rim side water supply passage 2a of the flush water supply device 6, which will be described in detail later, is connected to the upstream side of the rim water conduit 14 of the toilet body 4. Flush water supplied to the rim water outlet 14a from this rim side water supply passage 2a is discharged rearward from the rim water outlet 14a into the bowl section 8, thereby performing rim spouting.

[0017] 1 and 2, a jet water conduit 16 is formed from the outer surface to the bottom of the bowl portion 8 of the toilet body 4. The downstream side of this jet water conduit 16 is directed toward the inlet portion 12a of the drain trap portion 12 at the bottom of the bowl portion 8, and a jet water outlet 16a is provided at the downstream end of the jet water conduit 16. Additionally, upstream of the jet water conduit 16 of the toilet body 4, there is provided a jet side water supply conduit 2b of the flush water supply device 6, which will be described in detail later. Flush water supplied from this jet side water supply conduit 2b to the jet water conduit 16 of the toilet body 4 is discharged from the jet water outlet 16a towards the drain trap section 12, so that jet water spouting is performed. Here, as shown in FIG. 1, the upstream side of the rim-side water supply passage 2a of the flush water supply device 6 is connected to a changeover valve 18 (described in detail later) at the branch point B of the main water supply passage 2. On the other hand, as shown in FIG. 1, the upstream side of the jet side water supply passage 2b of the cleaning water supply device 6 is connected to a pressure pump 22 (details of which will be described later) of the cleaning water supply device 6, which is provided downstream of the water storage tank 20 of the cleaning water supply device 6.

[0018] Next, the drain trap section 12 of the toilet body 4 consists of an inlet section 12a provided at the bottom of the bowl section 8, an ascending pipe 12b rising from this inlet section 12a, and a descending pipe 12c descending from this ascending pipe 12b, with the top section 12d being between the ascending pipe 12b and the descending pipe 12c. As shown in FIG. 1, the outlet portion 12e of the downcomer pipe 12c of the drain trap portion 12 is connected to the inlet portion of a drain socket S disposed at the rear and below of the toilet body 4. 1, the outlet portion on the rear side of the drain socket S is connected to the inlet portion of the drain pipe D extending from the rear wall (not shown) side of the toilet body 4. This results in a so-called "wall-side drainage" drainage form in which wastewater discharged from the outlet portion 12e of the drain trap portion 12 of the toilet body 4 is discharged from the drain socket S to the drain pipe D on the wall side. Furthermore, the flush toilet 1 of this embodiment is not limited to this type of "wall-side drainage" drainage configuration, but can also be applied to a so-called "floor-side drainage" drainage configuration in which wastewater discharged from the outlet 12e of the drain trap section 12 of the toilet body 4 is discharged from the drain socket S to a drain pipe below the installation surface (floor surface F) of the bottom of the toilet body 4.

[0019] Next, each component of the flush water supply device 6 of the flush toilet 1 according to the present embodiment will be explained generally with reference to FIG. First, as shown in FIG. 1, the flush water supply device 6 is provided with, from the upstream side to the downstream side of the main water supply passage 2, a stop valve 24, a branch fitting 26, a valve unit 28, and a switching valve 18. Next, the valve unit 28 includes a constant flow valve 30, a diaphragm type main valve 32, and an electromagnetic valve 34 such as a solenoid valve. The cleaning water supply device 6 also includes a controller 36. The controller 36 is capable of functioning as a control unit that controls the opening and closing operation of the on-off valve (solenoid valve 34) of the valve unit 28, the switching operation of the switching valve 18, and the rotation speed and operating time of the pressure pump 22.

[0020] Furthermore, the constant flow valve 30 of the valve unit 28 is for restricting the flush water that has passed from the stop valve 24 in the main water supply passage 2 through the branch fitting 26 to a predetermined flow rate or less. Incidentally, in the case where a genital sanitary washing device (not shown) is provided for the flush toilet 1, the branch fitting 26 can also be connected to a water supply pipe (not shown) for supplying washing water to the genital sanitary washing device (not shown). Furthermore, in the valve unit 28, when the solenoid valve 34 is opened under the control of the controller 36, the main valve 32 opens, and the flushing water that has passed through the main valve 32 from the constant flow valve 30 is supplied to the switching valve 18 at the branch B downstream of the main water supply line 2. Here, the switching valve 18 is capable of supplying flushing water from the main water supply passage 2 to both the rim side water supply passage 2a and the tank side water supply passage 2c at the same time, making it possible to arbitrarily change the ratio of the amount of water supplied to the rim side and the tank side.

[0021] Next, the flush water supply device 6 is equipped with a tank device T that enables flush water supplied from the main water supply passage 2 to be supplied to the toilet body 4. This tank device T is equipped with a water storage tank 20 that is connected to the rear of the toilet body 4 and stores the flush water supplied from the main water supply passage 2, and a pump (pressurizing pump 22) that pressure-feeds the flush water in this water storage tank 20 to the toilet body 4. Furthermore, downstream of the branch B on the downstream side of the main water supply passage 2, there are provided a rim side water supply passage 2a that communicates with the rim water passage 14 of the toilet body 4, and a tank side water supply passage 2c that is connected to the water storage tank 20. As a result, the flush water supplied from the main water supply source W0 to the branch B of the main water supply passage 2 is used as at least one of the rim water supply to the rim side water supply passage 2a and the tank water supply to the tank side water supply passage 2c.

[0022] Furthermore, the wash water supply device 6 is provided with a pump water supply passage 2d that extends from the downstream side of the tank side water supply passage 2c to the pressure pump 22, and a jet side water supply passage 2b that extends from the pressure pump 22 to the downstream side. As a result, in the flush toilet 1 of this embodiment, flush water directly pressurized by the water supply is supplied from the main water supply passage 2 and is supplied from the rim side water supply passage 2a of the flush water supply device 6 through the rim water conduit 14 of the toilet body 4 to the rim water outlet 14a, making it possible for water to be discharged from the rim water outlet 14a (so-called "rim water discharge"). Furthermore, the flush water supplied from the main water supply passage 2 to the flush water supply device 6 passes through the tank side water supply passage 2c, the water storage tank 20, the pump water supply passage 2d and the pressure pump 22 of the flush water supply device 6, and is then supplied from the jet side water supply passage 2b through the jet water conduit 16 of the toilet body 4 to the jet water outlet 16a, making it possible for water to be discharged from the jet water outlet 16a (so-called ``jet water discharge''). In other words, the flush toilet 1 of this embodiment is capable of using both rim spouting of flush water directly pressurized from the main water supply line 2, and jet spouting of flush water pressurized by the pressure pump 22 from the water storage tank 20, and is designed to function as a so-called hybrid flush toilet 1.

[0023] Next, an upper float switch 38 and a lower float switch 40 are respectively disposed inside the water storage tank 20. The water level inside the water storage tank 20 can be detected by these float switches 38, 40. For example, the upper float switch 38 switches on when the water level in the water tank 20 reaches a predetermined water level, and the controller 36 detects the on state of the upper float switch 38 and closes the solenoid valve 34. On the other hand, the lower float switch 40 switches on when the water level in the water tank 20 drops to a predetermined water level that is lower than the predetermined stored water level detected by the upper float switch 38, and the controller 36 detects the on state of the lower float switch 40 and stops the pressure pump 22. In addition, the pressure pump 22 draws flush water stored in the water storage tank 20 into the pump water supply passage 2d, and pressurizes the flush water from this pump water supply passage 2d into the jet side water supply passage 2b, thereby discharging it from the jet water outlet 16a.

[0024] With this structure, during normal toilet flushing, the controller 36 detects the operation of the toilet flush switch (not shown) by the user, and sequentially activates the solenoid valve 34, the switching valve 18, and the pressure pump 22. This causes water to begin to be discharged sequentially from the rim water outlet 14a and the jet water outlet 16a, and the cleaning water that has cleaned the inside of the bowl portion 8 is discharged from the drain trap portion 12 together with the waste in the bowl portion 8. Furthermore, after flushing is completed, the controller 36 opens the solenoid valve 34, the switching valve 18 is switched to the tank side water supply passage 2c side, and flush water in the main water supply passage 2 is replenished to the water storage tank 20. When the water level in the water tank 20 rises and the upper float switch 38 detects the specified water level, the controller 36 closes the solenoid valve 34, causing the main valve 32 to close the main water supply line 2 and stopping the water supply. Furthermore, each of these devices of the flush water supply device 6 (functional section) is adapted to be stored in a rear functional storage section V0 (details of which will be described later) in the area rearward of the bowl section 8 of the toilet body 4.

[0025] Next, with reference to Figures 2 to 7, the rear function storage section V0 in which the flush water supply device 6 (functional section) is stored in the toilet body 4 of the flush toilet 1 according to this embodiment, and the surrounding structure of this rear function storage section V0 will be specifically explained. First, Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 2. Fig. 5 is a cross-sectional view taken along line VV in Fig. 2. Fig. 6 is a cross-sectional view taken along line VI-VI in Fig. 2. Fig. 7 is a cross-sectional view taken along line VII-VII in Fig. 2. Here, in the flush toilet 1 of this embodiment shown in Figs. 4 to 7, the flush water supply device 6 is not shown and has been omitted.

[0026] First, as shown in Figs. 2 to 7, the toilet body 4 is provided with a skirt portion 42 formed outside the respective side surfaces of the bowl portion 8 and the drain trap portion 12 thereof. In addition, the rear functional storage section V0 of the toilet body 4 is located below the upper end of the skirt section 42 and inside the skirt section 42 in the area rearward of the bowl section 8 of the toilet body 4, forming a storage area capable of storing at least a portion of the flushing water supply device 6 (functional section).

[0027] Next, as shown in Figures 2 to 7, the skirt portion 42 includes a rear wall portion 42a provided on the rear surface of the toilet body 4, and side wall portions 42b provided on the left and right sides when the toilet body 4 is viewed from the front. 5 to 7, each of the rear wall 42a and the side wall 42b of the skirt 42 includes an outer wall 42c that forms the outer surface of the skirt 42 and an inner wall 42d that is provided inside the outer wall 42c, and the outer wall 42c and the inner wall 42d form a double wall E. The double wall E forms an internal space I between the outer wall 42c and the inner wall 42d.

[0028] A connection opening 44 for connecting a drain pipe D is formed in a lower portion of the rear wall portion 42a of the skirt portion 42 at the center left and right when viewed from the front, so as to penetrate in the front-rear direction. 4 to 7, a drain socket storage section 46 is formed in front of the connection opening 44 in the left-right central and lower area of ​​the rear function storage section V0 of the toilet body 4. This drain socket storage section 46 functions as a storage area that can store a drain socket S (see FIG. 1) connected to the outlet section 12e of the downcomer pipe 12c of the drain trap section 12.

[0029] 5 to 7, the rear functional storage section V0 is provided with a support wall section 48 that supports the flush water supply device 6 (functional section). This support wall section 48 is joined to the drain trap section 12, and divides the storage area of ​​the rear functional storage section V0 into upper and lower sections, namely an upper area V1 and a lower area V2. In addition, the upper area V1 of the rear functional storage section V0 includes a storage area for storing at least a part of the cleaning water supply device 6 (functional section), and the lower area V2 of the rear functional storage section V0 includes the opening areas of the connection opening 44 and the drain socket storage section 46.

[0030] Next, as shown in Figs. 2 and 5 to 7, the support wall portion 48 of the rear function storage portion V0 has horizontal wall portions 48b extending horizontally from a joint portion 48a with the drain trap portion 12 to both the left and right sides and to the rear side. The support wall portion 48 also includes a lower wall portion 48c provided on the left and right outer side and below the horizontal wall portion 48b. The left and right outer sides of the lower wall portion 48c are joined to the inner wall portions 42d of the double wall portion E in the left and right side wall portions 42b of the skirt portion 42.

[0031] Next, as shown in Figures 2 and 4 to 7, the horizontal wall portion 48b of the support wall portion 48 of the rear functional storage section V0 has a horizontal main wall portion 50 provided so as to extend rearward from a position rearward of the drain core O1 in the drain trap section 12. Furthermore, the horizontal wall portion 48b of the support wall portion 48 of the rear functional storage portion V0 is provided with a horizontal auxiliary wall portion 52 that is provided on the rear side of the horizontal main wall portion 50 and joined to the rear wall portion 42a of the skirt portion 42.

[0032] As shown in Figs. 2 and 5 to 7, the left and right side end portions 50a of the horizontal main wall portion 50 are spaced apart from the left and right side wall portions 42b of the skirt portion 42 in the left-right direction. 2 and 4, the rear end portion of the horizontal auxiliary wall portion 52 is joined to the rear wall portion 42a of the skirt portion 42. Also, the left and right side end portions 52a of the horizontal auxiliary wall portion 52 are provided so as to be joined to the left and right side wall portions 42b of the skirt portion 42 in the left-right direction, respectively. As a result, the horizontal wall portion 48b of the support wall portion 48 has a generally T-shape in plan view shown in FIG. 2, with the horizontal main wall portion 50 extending in the front-rear direction and the horizontal auxiliary wall portion 52 extending in the left-right direction.

[0033] Next, as shown in Figures 2 and 4, the left and right end portions 52a of the rear horizontal auxiliary wall portion 52 in the horizontal wall portion 48b of the support wall portion 48 are joined to the inner wall portions 42d of the double wall portion E in the left and right side wall portions 42b of the skirt portion 42. Also, as shown in Figures 2 and 5 to 7, the left-right outer end portions 48d of the lower wall portions 48c of the support wall portion 48 form joints that are joined to the inner wall portions 42d of the double wall portion E in the left and right side wall portions 42b of the skirt portion 42. Furthermore, as shown in Figures 2 and 4 to 6, the skirt portion 42 has a single wall portion A in which the internal space I of the double wall portion E is removed at the upper end portion above the joints 48d, 52a between the double wall portion E and the support wall portion 48.

[0034] Next, as shown in FIG. 2 and FIG. 7, the side wall portion 42b of the skirt portion 42 is provided with a first skirt portion S1 formed of a double wall portion E from its lower end to its upper end. As shown in FIG. 2, the first skirt portion S1 is joined to a joint C1 where the bowl portion 8 of the toilet body 4 and the rear function storage portion V0 are joined. 2 and 4 to 6, the side wall portion 42b of the skirt portion 42 includes a second skirt portion S2 provided on the rear side of the first skirt portion S1. The second skirt portion S2 is formed of a double wall portion E from its lower end to a predetermined upper position P1, and is also formed of a single wall portion A from the predetermined upper position P1 to the upper end of the skirt portion 42.

[0035] Next, as shown in Figures 2 and 4 to 7, the upper region V1 of the rear functional storage section V0 includes a joint C1 between the bowl portion 8 of the toilet body 4 and the rear functional storage section V0, and a joint C2 between the drain trap section 12 and the support wall portion 48, and is provided with a front region V3 that is positioned forward of the drain core O1, which is the center of the pipeline on the outlet portion 12e side of the drain trap section 12. The upper area V1 of the rear function storage section V0 is provided with a rear area V4 disposed on the rear side of the front area V3. Furthermore, the double wall portion E of the first skirt portion S1 is provided in the front region V3 of the rear functional storage portion V0. Additionally, the single wall portion A of the second skirt portion S2 is provided in the rear region V4 of the rear function housing portion V0.

[0036] Next, as shown in FIG. 7, the double wall portion E of the first skirt portion S1 is inclined at a substantially constant inclination angle α with respect to the vertical plane L1 so that the wall surface of the inner wall portion 42d expands outward from the bottom to the top of the rear functional storage portion V0. As shown in Figs. 5 and 6, the second skirt portion S2 has a wall surface of the inner wall portion 42d of the double wall portion E that is inclined in two steps so as to widen outwardly from below toward above.

[0037] Furthermore, as shown in Figures 5 and 6, in the first inclination stage, the second skirt portion S2 is inclined at a first inclination angle β1 (α1 = β1) that is the same as the inclination angle α1 of the inner wall portion 42d of the first skirt portion S1 with respect to the vertical plane L1 so that the wall surface of the inner wall portion 42d of the double wall portion E extends outward from the joint 48d with the lower wall portion 48c of the lower support wall portion 48 toward the upward deflection position P2. Then, in the second inclination stage, the second skirt portion S2 is inclined at a second inclination angle β2 greater than the first inclination angle β1 with respect to the vertical plane L1 so that the second skirt portion S2 spreads outward from the deflection position P2 toward the upper single wall portion A (β1<β2).

[0038] Next, the operation of the flush toilet 1 according to the embodiment of the present invention described above will be explained with reference to Figs. 1 to 7. First, in accordance with the flush toilet 1 of one embodiment of the present invention, the support wall portion 48, which divides the storage area of ​​the rear functional storage section V0 into upper and lower regions (upper region V1, lower region V2) and supports the functional section (flush water supply device 6), is supported by being joined to the double wall portion E of the side wall portion 42b of the skirt portion 42, thereby enabling the strength of the support wall portion 48 and the skirt portion 42 to be mutually improved. Furthermore, in the skirt portion 42, the upper end portion above the joint 48d between the double wall portion E and the support wall portion 48 is provided with a single wall portion A in which the internal space I of the double wall portion E is eliminated. This makes it possible to secure a larger storage area within the rear functional storage portion V0 while maintaining the strength of the rear functional storage portion V0 from the joint 48d between the double wall portion E and the support wall portion 48 in the side wall portion 42b of the skirt portion 42 to the upper end portion above it. Therefore, while keeping the overall external dimensions of the toilet body 4 small, a large storage area for the functional part (flush water supply device 6) in the toilet body 4 can be secured, and the strength of the entire toilet body 4 can be increased.

[0039] Next, according to the flush toilet 1 of this embodiment, for example, if the entire area of ​​the skirt portion 42 above the joint 48d with the support wall portion 48 is set as the single wall portion A, a larger storage area can be secured within the rear functional storage portion V0, but this creates the problem that during manufacture, parts of the single wall portion A, etc. of the skirt portion 42 will be prone to deformation such as distortion due to insufficient strength. Therefore, in the flush toilet 1 of this embodiment, it is possible to combine a first skirt portion S1 formed of a double wall portion E from the lower end to the upper end of the side wall portion 42b of the skirt portion 42, and a second skirt portion S2 formed of a double wall portion E from the lower end of the side wall portion 42b of the skirt portion 42 to a predetermined upper position P1, and formed of a single wall portion A from the predetermined upper position P1 to the upper end of the side wall portion 42b of the skirt portion 42. This makes it possible to suppress deformation such as distortion of the double wall portion E and single wall portion A of the side wall portion 42b of the skirt portion 42 during manufacturing, and also makes it possible to ensure a larger storage area for the rear functional storage portion V0 while eliminating the lack of strength.

[0040] Furthermore, according to the flush toilet 1 of this embodiment, the joint C1 where the bowl portion 8 of the ceramic toilet body 4 and the rear function storage portion V0 are joined is generally a location that is prone to loads such as stress concentration due to the weight of the bowl portion 8 itself and the weight of the functional portion (flush water supply device 6) stored within the rear function storage portion V0. Therefore, even during the manufacture or transportation of the toilet body 4, if loads such as internal or external forces are applied to the joint C1 between the bowl portion 8 and the rear functional storage portion V0, the toilet body 4 may be damaged. Therefore, in the flush toilet 1 of this embodiment, a first skirt portion S1 formed from a double wall portion E from the lower end to the upper end of the side wall portion 42b of the skirt portion 42 is joined to the joint C1 between the bowl portion 8 of the toilet body 4 and the rear functional storage portion V0, so that the strength of the joint C1 between the bowl portion 8 and the rear functional storage portion V0 can also be improved by the double wall portion E of the first skirt portion S1. Therefore, for the rear function storage section V0 of the toilet body 4, a larger storage area can be ensured while eliminating any insufficient strength.

[0041] Furthermore, in the flush toilet 1 of this embodiment, the double wall portion E of the first skirt portion S1 includes a joint C1 between the bowl portion 8 of the toilet body 4 and the rear functional storage portion V0, and a joint C2 between the drain trap portion 12 and the support wall portion 48, and is provided in a forward region V3 of the rear functional storage portion V0 which is positioned forward of the drain core O1, which is the center of the pipeline on the outlet portion 12e side of the drain trap portion 12. This allows the joint C1 between the bowl portion 8 of the toilet body 4 and the front region V3 of the rear functional storage portion V0 to be supported by the double wall portion E of the first skirt portion S1, and also allows the support wall portion 48 supporting the drain trap portion 12 to be supported by the double wall portion E of the first skirt portion S1. Therefore, the strength of the first skirt portion S1 itself in the front region V3 of the rear functional storage portion V0 can be improved by the double wall portion E, and the supporting force when the first skirt portion S1 supports the joint C1 between the bowl portion 8 and the rear functional storage portion V0 can also be reinforced. In addition, since the strength of the first skirt portion S1 itself in the front region V3 of the rear functional storage portion V0 is reinforced by the double wall portion E, the supporting force when the first skirt portion S1 supports the drain trap portion 12 via the support wall portion 48 can also be reinforced. Furthermore, the first skirt portion S1 of the front region V3 of the rear functional storage portion V0, which includes the joint C1 with the bowl portion 8 and the joint C2 between the drain trap portion 12 and the support wall portion 48, can be made thicker than the single wall portion A of the second skirt portion S2 in the rear region V4 of the rear functional storage portion V0, due to the structure of its double wall portion E. As a result, when moving the toilet body 4 during transportation or installation, it becomes easier for workers to hold the structural portion of the double wall portion E of the first skirt portion S1, which is thicker than the single wall portion A of the second skirt portion S2, and therefore it is possible to avoid holding the single wall portion A of the second skirt portion S2, which is weaker in strength than the structural portion of the double wall portion E of the first skirt portion S1.

[0042] Furthermore, in the flush toilet 1 of this embodiment, the first skirt portion S1 is inclined at a substantially constant angle of inclination α1 with respect to the vertical plane L1 so that the wall surface of the inner wall portion 42d of the double wall portion E spreads outward from below to above the rear function storage section V0, making it less likely for deformation such as distortion to occur. In addition, with regard to the second skirt portion S2, the wall surface of the inner wall portion 42d of the double wall portion E is inclined in two stages so as to widen outward from the bottom to the top, thereby making it possible to secure a larger storage area within the rear functional storage portion V0. Furthermore, the wall surface at a constant inclination angle α1 on the inner wall portion 42d of the double wall portion E of the first skirt portion S1 and the wall surface at a two-stage inclination on the inner wall portion 42d of the double wall portion E of the second skirt portion S2 make it possible to increase the difference in thickness between the structural portion of the double wall portion E of the first skirt portion S1 and the structural portion of the single wall portion A of the second skirt portion S2. Therefore, when moving the toilet body 4 during transportation or installation, it is easier for workers to hold the structural portion of the double wall portion E of the first skirt portion S1, which is thicker than the single wall portion A of the second skirt portion S2, and therefore workers can be prevented from holding the single wall portion A of the second skirt portion S2, which is weaker in strength than the structural portion of the double wall portion E of the first skirt portion S1.

[0043] Furthermore, in the flush toilet 1 of this embodiment, in the first inclination stage, the second skirt portion S2 is inclined at a first inclination angle β1 that is the same as the inclination angle α1 of the inner wall portion 42d of the first skirt portion S1, so that the wall surface of the inner wall portion 42d of the double wall portion E spreads outward from the joint 48d with the lower support wall portion 48 toward the upward deflection position P2, and the first-stage inclinations of the double-wall portion E and the single-wall portion A are the same. As a result, in the region from the joint 48d with the lower support wall portion 48 to the upper deflection position P2, the wall surfaces of the inner wall portions 42d of the double wall portions E of the first skirt portion S1 and the second skirt portion S2 are formed smoothly without any steps. Therefore, even in the first skirt portion S1 and the second skirt portion S2 near the joint 48d with the support wall portion 48, deformation such as steps or distortion is less likely to occur, thereby suppressing a lack of strength in the rear functional storage portion V0. In addition, in the second inclination stage, the second skirt portion S2 is inclined at a second inclination angle β2 greater than the first inclination angle β1 so as to spread outward from the deflection position P2 of the inner wall portion 42d of the double wall portion E toward the upper single wall portion A, and the inclination of the second inclination angle β2 of the second skirt portion S2 in the second inclination stage can be shaped to spread outward toward the upper single wall portion A with the deflection position P2 of the double wall portion E as a base end. This makes it possible to suppress a lack of strength in the transition portion where the double wall portion E transitions to the single wall portion A during the second inclination stage of the second skirt portion S2, while ensuring a larger storage area within the rear functional storage portion V0. [Explanation of symbols]

[0044] 1. Flush toilet according to one embodiment of the present invention (hybrid flush toilet) 2 Main water supply channel 2a Rim side water supply channel 2b Jet side water supply line 2c Tank side water supply channel 2d Pump supply line 4. Toilet body 6 Cleaning water supply device (functional part) 8 Bowl section 10 Rim 12 Drain trap section 12a Inlet of drain trap 12b Drain trap riser 12c Downcomer pipe of drain trap 12d Top of drain trap 12e Outlet of drain trap 14 Rim Waterway 14a Rim Spout 16 Jet Waterway 16a Jet nozzle 18 Switching valve 20 Water Tank 22 Pressure pump 24 Stopcock 26 Branch fitting 26a Power failure changeover valve 28 Valve unit 30 Constant flow valve 32 Diaphragm type main valve 34 Solenoid valve 36 Controller 38 Upper float switch 40 Lower float switch 42 Skirt Club 42a Rear wall of skirt 42b Side wall of skirt 42c Outer wall of skirt 42d Inner wall of skirt 42e Bottom of skirt 42f Bottom recess of skirt 44 Connection opening 46 Drain socket storage area 48 Support wall section 48a Joint 48b Horizontal wall 48c Lower wall 48d Lower wall outer edge, joint 50 Horizontal main wall 50a Left and right side ends of horizontal main wall 52 Horizontal auxiliary wall 52a Left and right side ends and joints of horizontal auxiliary wall A Single wall section B Branch C1 Joint between the bowl of the toilet body and the rear functional storage section C2 Junction between drain trap and supporting wall D Drain pipe E Double wall section F Floor I Interior space L1 vertical plane O1 drainage wick P1: a predetermined upper position of the double wall of the second skirt portion; P2 deflection position S Drain Socket S1 1st Skirt Section S2 2nd Skirt Section T tank device (cleaning water supply device) V0 Rear functional storage area V1 Upper area of ​​rear function storage V2 Lower area of ​​rear function storage V3 Front area of ​​the upper area of ​​the rear function storage V4 Rear area of ​​the upper area of ​​the rear function storage area W0 Main water supply source α1: Angle of inclination of the inner wall of the first skirt β1 First inclination angle of the inner wall of the second skirt β2 Second inclination angle of the inner wall of the second skirt

Claims

1. A flush toilet that is flushed with flush water to discharge waste, a ceramic toilet body having a bowl portion for receiving waste and a drain trap portion having an inlet portion connected to the bottom of the bowl portion for discharging waste within the bowl portion; a functional section provided behind the bowl section of the toilet body and having a function of controlling the discharge and stopping of flush water into the bowl section, The ceramic toilet body further includes a skirt portion formed outside the respective side surfaces of the bowl portion and the drain trap portion, and a rear function storage portion provided below the upper end of the skirt portion in an area rearward of the bowl portion and inside the skirt portion, and capable of storing at least a portion of the function portion, the rear functional storage section includes a support wall section that supports the functional section, the skirt portion forms a double wall portion having an outer wall portion forming an outer surface thereof and an inner wall portion provided inside the outer wall portion, and at least a portion of the double wall portion forms an internal space between the outer wall portion and the inner wall portion; the support wall portion is supported by being joined to the double wall portion of the skirt portion, and the skirt portion has a single wall portion in which an internal space of the double wall portion is eliminated in a portion above the joint between the double wall portion and the support wall portion, the joint portion is joined to the inner wall portion that forms the internal space of the double wall portion, the inner wall portion is joined to the single wall portion at an inclination angle of the inner wall surface with respect to the vertical plane that is the same as an inclination angle of the inner wall surface of the single wall portion with respect to the vertical plane, A flush toilet wherein the support wall portion is joined to the rear wall portion of the skirt portion.

2. 2. The flush toilet according to claim 1, wherein the skirt portion comprises a first skirt portion formed from the double wall portion from its lower end to its upper end, and a second skirt portion formed from the double wall portion from the lower end of the skirt portion to a predetermined upper position and from the single wall portion from the predetermined upper position to the upper end of the skirt portion.

3. 3. The flush toilet according to claim 2, wherein the first skirt portion is provided at a joint where the bowl portion of the toilet body and the rear functional storage portion are joined.

4. The rear functional storage section includes the joint between the bowl section of the toilet body and the rear functional storage section, and the joint between the drain trap section and the support wall section, and is provided with a front region that is located forward of a drain core that is the center of the pipe on the outlet side of the drain trap section, and a rear region that is located rearward of the front region, The double wall portion of the first skirt portion is provided in a front region of the rear functional storage portion, 4. The flush toilet according to claim 3, wherein the single wall portion of the second skirt portion is provided in the rear region of the rear functional storage portion.

5. The double wall portion of the first skirt portion is inclined at a substantially constant inclination angle so that the wall surface of the inner wall portion thereof widens outward from below toward above the rear functional storage portion, 5. The flush toilet according to claim 2, wherein the second skirt portion has a double wall whose inner wall surface is inclined in two stages so that it widens outward from below toward above.

6. 6. A flush toilet according to claim 5, wherein, in a first inclination stage, the second skirt portion is inclined at a first inclination angle that is the same as the inclination angle of the inner wall portion of the first skirt portion so that the wall surface of the inner wall portion of the double wall portion spreads outward from the joint with the lower support wall portion toward an upward deflection position, and then, in a second inclination stage, is inclined at a second inclination angle that is greater than the first inclination angle so that the wall surface spreads outward from the deflection position toward the upper single wall portion.

Images