Water-washable 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 flushing toilet, and particularly to a flushing toilet that is washed with washing water and discharges dirt.

Background Art

[0002] Conventionally, as a flushing toilet that is washed with washing water and discharges dirt, for example, as described in Patent Documents 1 to 3, a so-called "full skirt type" or "overall skirt type" flushing toilet in which a skirt portion formed outside each side surface of the bowl portion and the drain trap portion of the ceramic toilet body is formed over the entire circumference of the toilet body is known. In such a conventional "full skirt type" or "overall skirt type" flushing toilet, a storage area capable of storing a functional part including a function of controlling the discharge and stop of washing water to the bowl part of the toilet body is provided in an area behind the bowl part of the toilet body. Further, in the conventional flushing toilet described in Patent Document 1, the side wall portion of the skirt portion forms a double wall portion including an outer wall portion forming its outer surface and an inner wall portion provided inside with respect to this outer wall portion. The side wall portion of this skirt portion has a double wall structure, 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 in the storage area of the functional part of the toilet body. Next, in the conventional flushing toilet described in Patent Document 2, the side wall portion of the skirt portion that forms a storage area for the functional part behind the bowl part of the toilet body forms a double wall portion including an outer wall portion forming its outer surface and an inner wall portion provided inside with respect to this outer wall portion, and forms an internal space between the outer wall portion and the inner wall portion. Further, in the upper part of the double wall portion of this skirt portion, it is a single wall portion in which the internal space between the inner wall portion and the outer wall portion is deleted. Furthermore, in the conventional flush toilet described in Patent Document 3, the support wall portion provided in the storage area of ​​the functional part of the toilet bowl body extends horizontally from the joint with the drain trap portion to the skirt portions on both the left and right sides. The left and right ends of this support wall portion are joined to the single wall portions of the side walls of the left and right skirt portions, respectively, but a double wall portion is formed in the side walls of the skirt portions below this joint. That is, the left and right ends of the support wall portion are supported by the single wall portion above the joint with the skirt portion, and also by the double wall portion below the joint with the skirt portion. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 6691659 (Japanese Unexamined Patent Publication No. 2017-89282) [Patent Document 2] Japanese Patent Publication No. 2020-169538 [Patent Document 3] Japanese Patent Publication No. 2014-114633 [Overview of the project] [Problems that the invention aims to solve]

[0004] On the other hand, in recent years, with the diversification of flush toilet designs and improvements in the aesthetics of flush toilets, one of the challenges that has arisen is how to make the overall external dimensions of the toilet body smaller (slimmer) while ensuring a large storage area for the functional parts behind the bowl of the toilet body. However, in the conventional flush toilet described in Patent Document 1 above, for example, the double wall portion of the side wall portion of the skirt portion is joined to the support wall portion of the storage area of ​​the functional portion, so that a storage area strong enough to withstand the weight of the functional portion can be secured. However, there is a problem that the storage area of ​​the functional portion is reduced and narrowed because the side wall portion of the skirt portion has a thick structure due to the double wall portion in all areas from the bottom end to the top end. 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 bowl body is not joined to the double wall portion of the side wall portion of the skirt portion. As a result, there is a problem that the support wall portion supporting the functional part may be prone to deformation such as distortion due to insufficient strength. Furthermore, in the conventional flush toilet described in Patent Document 3 mentioned above, the area of ​​the skirt portion below the joint between the support wall portion and the side walls of the left and right skirt portions, which is provided in the storage area of ​​the functional portion, is a double wall portion, but the area of ​​the skirt portion above the joint between the support wall portion and the side walls of the left and right skirt portions is a single wall portion. As a result, the storage area of ​​the functional portion cannot be secured in the area below the horizontal support wall portion, and is concentrated in the area above the horizontal support wall portion, which presents a problem in that it is difficult to secure a large storage area for the functional portion in both the upper and lower areas. Furthermore, the storage area, which is concentrated above the support wall, is surrounded by a single wall on the side of the skirt section. Depending on the weight of the functional parts stored in the storage area, this may result in insufficient strength, and deformation such as distortion of the support wall and skirt section may affect the external shape of the toilet bowl itself.

[0005] Therefore, the present invention has been made to solve the problems and issues of the conventional technology described above, and aims to provide a flush toilet that can reduce the overall external dimensions of the toilet body while securing a large storage area for the functional parts in the toilet body, and increasing the overall strength of the toilet body. [Means for solving the problem]

[0006] To solve the above-mentioned problems, the present invention provides a flush toilet that is washed with flushing water to discharge waste, comprising: a ceramic toilet body having a bowl portion for receiving waste and a drain trap portion having an inlet connected to the lower part of the bowl portion for discharging waste from the bowl portion; and a functional portion provided on the rear side of the toilet body beyond the bowl portion and including a function for controlling the flow of flushing water to the bowl portion, wherein the ceramic toilet body further comprises a skirt portion formed on the outside of the respective sides of the bowl portion and the drain trap portion, and a portion provided below the upper end of the skirt portion and inside the skirt portion in the region rear of the bowl portion, comprising at least a part of the functional portion The skirt portion is characterized by having a rear functional storage section capable of storing a rear functional storage section, the rear functional storage section having a support wall that divides its storage area vertically and supports the functional section, the skirt portion forming a double wall section having an outer wall section that forms its outer surface and an inner wall section provided on the inside of the outer wall section, at least a part of which the double wall section has an internal space between the outer wall section and the inner wall section, the support wall section is supported by being joined to the double wall section of the skirt portion, and the skirt portion having a single wall section above the joint between the double wall section and the support wall section where the internal space of the double wall section is removed at the upper end portion. In the present invention configured in this way, the support wall portion that divides the storage area of ​​the rear functional storage portion vertically and supports the functional portion is supported by being joined to the double wall portion of the skirt portion, thereby improving the strength of both the support wall portion and the skirt portion. Furthermore, in the skirt section, the upper end portion above the joint between the double wall section and the support wall section is provided with a single wall section in which the internal space of the double wall section is removed. This allows for a larger storage area within the rear functional storage section while maintaining the strength of the rear functional storage section from the joint between the double wall section and the support wall section to the upper end portion above it. Therefore, it is possible to reduce the overall external dimensions of the toilet bowl while securing a large storage area for the functional parts within the toilet bowl, and also to increase the overall strength of the toilet bowl.

[0007] In the present invention, preferably, the skirt portion comprises a first skirt portion formed by the double wall portion from its lower end to its upper end, and a second skirt portion formed by the double wall portion from the lower end of the skirt portion to a predetermined upper position, and formed by the single wall portion from the predetermined upper position to the upper end of the skirt portion. In the present invention configured in this way, for example, if the entire area above the joint with the support wall in the skirt portion is set as a single wall portion, a larger storage area can be secured in the rear functional storage portion. On the other hand, during manufacturing, a problem arises in that the single wall portion of the skirt portion, etc., is prone to deformation such as distortion due to insufficient strength. Therefore, in the present invention, by combining a first skirt portion formed with a double wall portion from the lower end to the upper end of the skirt portion, and a second skirt portion formed with a double wall portion from the lower end to a predetermined upper position and with a single wall portion from the predetermined upper position to the upper end of the skirt portion, deformation such as distortion of the double wall portion and single wall portion of the skirt portion during manufacturing can be suppressed, and the rear functional storage portion can be made larger while eliminating insufficient strength.

[0008] In the present invention, preferably, the first skirt portion is provided at the joint where the bowl portion of the toilet body and the rear functional storage portion are joined. In the present invention configured as described above, the joint between the bowl portion of the ceramic toilet body and the rear functional storage portion is generally a point where stress concentration and other loads are easily applied due to the weight of the bowl portion itself and the weight of the functional components stored in the rear functional storage portion. Therefore, during the manufacturing or transportation of the toilet bowl, if internal or external forces act on the joint between the bowl and the rear functional storage area, the toilet bowl may be damaged. Therefore, in the present invention, the first skirt portion, which is formed with 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 and the rear functional storage portion of the toilet bowl body. This allows the strength of the joint between the bowl portion and the rear functional storage portion to be improved by the double wall portion of the first skirt portion. Therefore, the rear functional storage compartment can also be made larger while resolving the issue of insufficient strength.

[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 comprises a front region located forward of the drain center, which is the center of the pipeline on the outlet side of the drain trap portion, and a rear region located behind this front region, wherein 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 as described above, the double wall portion of the first skirt portion 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 is provided in the front region of the rear functional storage portion which is located 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 support wall portion which supports the drain trap portion can also be supported by the double wall portion of the first skirt portion. Therefore, the strength of the first skirt portion itself in the front region of the rear functional storage section can be improved by the double wall portion, and the support force when the first skirt portion supports the joint between the bowl portion and the rear functional storage section can also be reinforced. Furthermore, since the strength of the first skirt portion itself in the front region of the rear functional storage section is reinforced by the double wall portion, the support 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 of the front area of ​​the rear functional storage section, including the joint with the bowl portion and the joint between the drain trap portion and the support wall portion, can be made thicker due to its double-wall structure compared to the single-wall structure of the second skirt portion of the rear area of ​​the rear functional storage section. As a result, when moving the toilet bowl during transport or installation, workers can more easily hold the double-walled structure of the first skirt, which is thicker than the single-walled structure of the second skirt, thus preventing them from holding the single-walled structure of the second skirt, which is weaker than the double-walled structure of the first skirt.

[0010] In the present invention, preferably, the double wall portion of the first skirt portion is inclined at a substantially constant angle such that the wall surface of the inner wall portion spreads outward from below to above the rear functional storage portion. The second skirt section described above has a two-stage inclination in which the inner wall surface of its double wall section widens outward from bottom to top. In the present invention configured in this manner, the first skirt portion is inclined at a nearly constant angle so that the inner wall surface of the double wall portion spreads outward from below to above the rear functional storage portion, making it difficult for deformation such as distortion to occur. Furthermore, the second skirt section has a double-walled inner wall that slopes in two stages, widening outwards from bottom to top, which allows for a larger storage area within the rear functional storage compartment. Furthermore, the constant inclination angle of the inner wall portion of the double wall portion of the first skirt section and the two-stage inclined wall portion of the inner wall portion of the double wall portion of the second skirt section make it possible to increase the difference in thickness between the structural portion of the double wall portion of the first skirt section and the structural portion of the single wall portion of the second skirt section. Therefore, when moving the toilet bowl during transport or installation, it becomes easier for workers to hold the double-walled structural portion of the first skirt, which is thicker than the single-walled portion of the second skirt, thus preventing them from holding the single-walled portion of the second skirt, which is weaker than the double-walled structural portion of the first skirt.

[0011] In the present invention, preferably, the second skirt portion is inclined at the same first inclination angle as the inner wall portion of the first skirt portion in the first inclination stage, such 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 upper deflection position, and then, in the second inclination stage, it is inclined at a second inclination angle greater than the first inclination angle, such that it spreads outward from the deflection position toward the upper single wall portion. In the present invention configured as described above, the second skirt portion is inclined at the same first inclination angle as the inner wall portion of the first skirt portion in the first inclination stage, such 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 upper deflection position. Since the first inclination 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 toward the upper deflection position, the wall surfaces of the inner wall portions of the double wall portions of the first skirt portion and the second skirt portion are formed smoothly without any steps between them. Therefore, deformations such as steps and distortions are less likely to occur in the first skirt portion and the second skirt portion near the joint with the support wall portion, thereby suppressing insufficient strength of the rear functional storage portion. Furthermore, 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 deflection position of the inner wall portion of the double wall portion towards the upper single wall portion. The inclination of the second inclination angle of the second skirt portion in the second inclination stage can be made to spread outward from the deflection position of the double wall portion towards the upper single wall portion. This allows for a larger storage area within the rear functional storage section while suppressing insufficient strength in the transition portion where the second skirt section transitions from a double wall section to a single wall section during the second inclination stage of the second skirt section. [Effects of the Invention]

[0012] According to the flushing toilet of the present invention, while suppressing the overall external dimensions of the toilet body, it is possible to secure a large storage area for the functional parts in the toilet body and enhance the strength of the entire toilet body.

Brief Description of the Drawings

[0013] [Figure 1] It is an overall configuration diagram of a flushing toilet according to an embodiment of the present invention. [Figure 2] It is a plan view of a flushing toilet according to an embodiment of the present invention. [Figure 3] It is an exploded perspective view of a flushing toilet according to an embodiment of the present invention as viewed from the rear and obliquely upward. [Figure 4] It is a cross-sectional view taken along line IV-IV of FIG. 2. [[ID=第十八条]] [Figure 5] It is a cross-sectional view taken along line V-V of FIG. 2. [Figure 6] It is a cross-sectional view taken along line VI-VI of FIG. 2. [Figure 7] It is a cross-sectional view taken along line VII-VII of FIG. 2.

Modes for Carrying Out the Invention

[0014] [[ID=第三十三条]] Hereinafter, a flushing toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings. First, the overall configuration of a flushing toilet according to an embodiment of the present invention will be schematically described with reference to FIGS. 1 to 3. [[ID=第三十七条]] FIG. 1 is an overall configuration diagram of a flushing toilet according to an embodiment of the present invention. Further, FIG. 2 is a plan view of a flushing toilet according to an embodiment of the present invention. Furthermore, FIG. 3 is an exploded perspective view of a flushing toilet according to an embodiment of the present invention as viewed from the rear and obliquely upward. As shown in FIGS. 1 to 3, a flushing toilet 1 according to an embodiment of the present invention includes a water supply passage (main water supply passage 2) through which the washing water supplied from a main water supply source W0 such as a water supply passes, a toilet body 4 made of pottery, and a washing 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. Furthermore, as shown in Figures 1 to 3, the flushing water supply device 6, which will be described in detail later, is located behind the bowl portion 8 of the toilet body 4 and is a functional unit that enables the supply of flushing water from the main water supply channel 2 to the toilet body 4. More specifically, this functional unit is powered by electricity and includes the function of controlling the flow of flushing water to the bowl portion 8 of the toilet body 4.

[0016] Next, as shown in Figure 2, a rim water channel 14 is formed inside the rim portion 10 on one side of the toilet bowl body 4 (the right side when viewing the toilet bowl body 4 from the front). This rim water channel 14 extends from the rear of the toilet body 4 towards the front, then bends towards the rear, forming a so-called U-turn shape within the rim portion 10 on one side of the toilet body 4 (the right side when viewing the toilet body 4 from the front). A rim outlet 14a is provided at the downstream end (downstream rear end) of this rim water channel 14. Furthermore, the rim-side water supply channel 2a of the flushing water supply device 6, which will be described in detail later, is connected to the upstream side of the rim water supply channel 14 of the toilet bowl body 4. The flushing water supplied from this rim-side water supply channel 2a to the rim outlet 14a is discharged from the rim outlet 14a toward the rear into the bowl section 8, thereby performing rim flushing.

[0017] Next, as shown in Figures 1 and 2, a jet water channel 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 channel 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 outlet 16a is provided at the downstream end of the jet water channel 16. Furthermore, upstream of the jet water channel 16 of the toilet bowl body 4, there is a jet-side water supply channel 2b of the flushing water supply device 6, which will be described in detail later. The flushing water supplied from this jet-side water supply channel 2b to the jet water channel 16 of the toilet bowl body 4 is discharged from the jet outlet 16a toward the drain trap section 12, thereby performing jet water discharge. Here, as shown in Figure 1, the upstream side of the rim-side water supply channel 2a of the cleaning water supply device 6 is connected to the switching valve 18 (details will be described later) at the branch section B of the main water supply channel 2. On the other hand, as shown in Figure 1, the upstream side of the jet-side water supply channel 2b of the cleaning water supply device 6 is connected to the pressure pump 22 of the cleaning water supply device 6 (details will be described later), which is located downstream of the water storage tank 20 of the cleaning water supply device 6.

[0018] Next, the drain trap section 12 of the toilet bowl body 4 consists of an inlet 12a provided at the bottom of the bowl section 8, a rising pipe 12b rising from the inlet 12a, and a descending pipe 12c descending from the rising pipe 12b, with the top section 12d being the space between the rising pipe 12b and the descending pipe 12c. Furthermore, as shown in Figure 1, the outlet 12e of the descending pipe 12c of the drain trap section 12 is connected to the inlet of the drain socket S, which is located at the rear and below the toilet bowl body 4. Furthermore, as shown in Figure 1, the rear outlet of the drain socket S is connected to the inlet of the drain pipe D that extends from the rear wall (not shown) of the toilet bowl body 4. As a result, the wastewater discharged from the outlet 12e of the drain trap section 12 of the toilet bowl body 4 is discharged from the drain socket S into the drain pipe D on the wall side, resulting in a so-called "wall-side drainage" drainage configuration. Furthermore, the flush toilet 1 of this embodiment is not limited to this "wall-side drainage" method, but is also applicable to a so-called "floor-side drainage" method, in which the wastewater discharged from the outlet 12e of the drain trap section 12 of the toilet bowl body 4 is discharged from the drain socket S to the drain pipe below the installation surface (floor surface F) of the bottom surface of the toilet bowl body 4.

[0019] Next, the components of the flushing water supply device 6 of the flush toilet 1 according to this embodiment will be described in general terms with reference to Figure 1. First, as shown in Figure 1, the cleaning water supply device 6 is equipped with a stopcock 24, a branch fitting 26, a valve unit 28, and a switching valve 18, respectively, from the upstream side to the downstream side of the main water supply channel 2. Next, the valve unit 28 is equipped with a constant flow valve 30, a diaphragm-type main valve 32, and an electromagnetic valve 34 such as a solenoid valve. Furthermore, the cleaning water supply device 6 is equipped with a controller 36. This controller 36 can function 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 pressurizing pump 22.

[0020] Furthermore, the constant flow valve 30 of the valve unit 28 is for restricting the flow rate of the flushing water that has passed from the stopcock 24 in the main water supply channel 2 through the branch fitting 26 to below a predetermined flow rate. Incidentally, in the case where a local sanitary washing device (not shown) is provided with 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 local sanitary washing device (not shown). Furthermore, in the valve unit 28, when the solenoid valve 34 is opened by the control of the controller 36, the main valve 32 opens, and the flushing water that has passed from the constant flow valve 30 through the main valve 32 is supplied to the switching valve 18 at the branch section B on the downstream side of the main water supply channel 2. Here, the switching valve 18 is capable of supplying cleaning water from the main water supply channel 2 to both the rim-side water supply channel 2a and the tank-side water supply channel 2c at the same time, and the ratio of the amount of water supplied to the rim side and the tank side can be arbitrarily changed.

[0021] Next, the flushing water supply device 6 is equipped with a tank device T that enables the supply of flushing water from the main water supply channel 2 to the toilet bowl body 4. This tank device T is connected to the rear of the toilet bowl body 4 and includes a water storage tank 20 that stores the flushing water supplied from the main water supply channel 2, and a pump (pressure pump 22) that pressurizes the flushing water in the water storage tank 20 and sends it to the toilet bowl body 4. Furthermore, downstream of the branch section B on the downstream side of the main water supply channel 2, there is a rim-side water supply channel 2a that communicates with the rim water supply channel 14 of the toilet bowl body 4, and a tank-side water supply channel 2c that connects to the water storage tank 20. As a result, the cleaning water supplied from the main water source W0 to the branch section B of the main water supply channel 2 is used as water for supplying water to the rim side water supply channel 2a and water for supplying water to the tank side water supply channel 2c, at least one of the two.

[0022] Furthermore, the cleaning water supply device 6 is provided with a pump water supply channel 2d extending from the downstream side of the tank-side water supply channel 2c to the pressurizing pump 22, and a jet-side water supply channel 2b extending downstream from the pressurizing pump 22. As a result, in the flush toilet 1 of this embodiment, flushing water at direct water pressure supplied from the main water supply channel 2 is supplied from the rim-side water supply channel 2a of the flushing water supply device 6 through the rim water supply channel 14 of the toilet body 4 to the rim outlet 14a, enabling water to be discharged from the rim outlet 14a (so-called "rim discharge"). Furthermore, the flushing water supplied from the main water supply channel 2 to the flushing water supply device 6 passes through the tank-side water supply channel 2c, the water storage tank 20, the pump water supply channel 2d, and the pressure pump 22 of the flushing water supply device 6, and is then supplied from the jet-side water supply channel 2b through the jet water conduit 16 of the toilet bowl body 4 to the jet outlet 16a, enabling water to be discharged from the jet outlet 16a (so-called "jet discharge"). In other words, the flush toilet 1 of this embodiment functions as a so-called hybrid flush toilet 1 that can use both flushing water directly supplied from the main water supply channel 2 to create a rim and flushing water pressurized by a pressure pump 22 from the water storage tank 20.

[0023] Next, an upper float switch 38 and a lower float switch 40 are located inside the water storage tank 20. These float switches 38 and 40 allow for the detection of the water level inside the water storage tank 20. For example, the upper float switch 38 is switched on when the water level in the water storage tank 20 reaches a predetermined water level, and the controller 36 detects this 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 storage tank 20 falls to a predetermined water level lower than a predetermined water level detected by the upper float switch 38. The controller 36 detects this ON state of the lower float switch 40 and stops the pressurizing pump 22. Furthermore, the pressurizing pump 22 draws the cleaning water stored in the water storage tank 20 into the pump water supply channel 2d, and pressurizes the cleaning water from this pump water supply channel 2d into the jet-side water supply channel 2b, thereby causing it to be discharged from the jet outlet 16a.

[0024] With these structures, during normal toilet flushing, the controller 36 detects the user's operation of the toilet flushing switch (not shown) and sequentially activates the solenoid valve 34, the switching valve 18, and the pressure pump 22. As a result, water is discharged sequentially from the rim outlet 14a and the jet outlet 16a, and the cleaning water that has washed the inside of the bowl 8 is discharged from the drain trap 12 along with the dirt inside the bowl 8. Furthermore, after the cleaning is complete, the controller 36 opens the solenoid valve 34, switching the switching valve 18 to the tank-side water supply channel 2c, so that the cleaning water in the main water supply channel 2 is supplied to the water storage tank 20. Then, when the water level in the water storage tank 20 rises and the upper float switch 38 detects a specified amount of water, the controller 36 closes the solenoid valve 34, causing the main valve 32 to close the main water supply channel 2 and stopping the water supply. Furthermore, each component of these flushing water supply devices 6 (functional unit) is housed in a rear functional storage unit V0 (details will be described later) located in the area behind the bowl portion 8 of the toilet body 4.

[0025] Next, with reference to Figures 2 to 7, the rear functional storage section V0 in which the flushing water supply device 6 (functional unit) of the toilet bowl body 4 of the flush toilet 1 according to this embodiment is housed, and the surrounding structure of this rear functional storage section V0 will be described in detail. First, Figure 4 is a cross-sectional view along the line IV-IV in Figure 2. Next, Figure 5 is a cross-sectional view along the line VV in Figure 2. Furthermore, Figure 6 is a cross-sectional view along the line VI-VI in Figure 2. Finally, Figure 7 is a cross-sectional view along the line VII-VII in Figure 2. In this embodiment, the flush toilet 1 shown in Figures 4 to 7 does not show the flushing water supply device 6, which is omitted.

[0026] First, as shown in Figures 2 to 7, the toilet bowl body 4 is equipped with a skirt portion 42 that is formed outside the sides of its bowl portion 8 and drain trap portion 12. Furthermore, the rear functional storage section V0 of the toilet body 4 is located in the area rearward of the bowl section 8 of the toilet body 4, below the upper end of the skirt section 42 and inside the skirt section 42, forming a storage area capable of housing at least a part of the flushing water supply device 6 (functional section).

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

[0028] Furthermore, a connection opening 44 is formed in the lower, left-right center portion of the rear wall portion 42a of the skirt portion 42, when viewed from the front, so as to penetrate in the front-rear direction, to which the drain pipe D is connected. Furthermore, as shown in Figures 4 to 7, a drain socket storage section 46 is formed in front of the connection opening 44 in the left-right center and lower region of the rear functional storage section V0 of the toilet bowl body 4. This drain socket storage section 46 functions as a storage area capable of accommodating the drain socket S (see Figure 1) connected to the outlet section 12e of the descending pipe 12c of the drain trap section 12.

[0029] Next, as shown in Figures 5 to 7, the rear functional storage section V0 is equipped with a support wall 48 that supports the washing water supply device 6 (functional section). This support wall 48 is joined to the drain trap section 12, dividing the storage area of ​​the rear functional storage section V0 into upper and lower sections, V1 and V2, respectively. Furthermore, the upper region V1 of the rear function storage section V0 includes a storage area that houses at least a part of the cleaning water supply device 6 (function section), and the lower region V2 of the rear function storage section V0 includes the opening areas of the connection opening 44 and the drain socket storage section 46, respectively.

[0030] Next, as shown in Figures 2, 5 to 7, the support wall portion 48 of the rear functional storage section V0 includes horizontal wall portions 48b that extend horizontally from the joint portion 48a with the drain trap section 12 to both the left and right sides and to the rear. Furthermore, the support wall portion 48 includes a lower wall portion 48c that is provided to the left and right outward and below its horizontal wall portion 48b. The left and right outer sides of this lower wall portion 48c are joined to the inner wall portion 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 portion V0 includes a horizontal main wall portion 50 that extends rearward from the rearward side of the drain center O1 in the drain trap portion 12. Furthermore, the horizontal wall portion 48b of the support wall portion 48 of the rear functional storage section V0 includes a horizontal auxiliary wall portion 52 which 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] Furthermore, as shown in Figures 2 and 5 to 7, the left and right side ends 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. On the other hand, as shown in Figures 2 and 4, the rear end of the horizontal auxiliary wall portion 52 is joined to the rear wall portion 42a of the skirt portion 42. Furthermore, the left and right side ends 52a of the horizontal auxiliary wall portion 52 are provided to be joined to the left and right side wall portions 42b of the skirt portion 42 in the left-right direction. As a result, the horizontal wall portion 48b of the support wall portion 48 has a roughly T-shape in the plan view shown in Figure 2, due to 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 ends 52a of the rear horizontal auxiliary wall portion 52 in the horizontal wall portion 48b of the support wall portion 48 are joints that are joined to the inner wall portion 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 5 to 7, the left-right outer end 48d of the lower wall portion 48c of the support wall portion 48 is a joint that is joined to the inner wall portion 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 joint portions 48d and 52a between the double wall portion E and the support wall portion 48.

[0034] Next, as shown in Figures 2 and 7, the side wall portion 42b of the skirt portion 42 is provided with a first skirt portion S1 formed by a double wall portion E from its lower end to its upper end. Furthermore, as shown in Figure 2, the first skirt portion S1 is joined to the joint portion C1 where the bowl portion 8 of the toilet body 4 and the rear functional storage portion V0 are joined. Furthermore, as shown in Figures 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. This second skirt portion S2 is formed with a double wall portion E from its lower end to a predetermined upper position P1, and with a single wall portion A from this 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 the joint C1 between the bowl portion 8 of the toilet body 4 and the rear functional storage section V0, and the joint C2 between the drain trap section 12 and the support wall portion 48, and also includes a front region V3 located forward of the drain core O1, which is the center of the pipe on the outlet portion 12e side of the drain trap section 12. Furthermore, the upper region V1 of the rear function storage section V0 includes a rear region V4 located behind the front region 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. Furthermore, the single wall portion A of the second skirt portion S2 is provided in the rear area V4 of the rear function storage portion V0.

[0036] Next, as shown in Figure 7, the double wall portion E of the first skirt portion S1 is inclined at a nearly constant angle α with respect to the vertical plane L1 such that the wall surface of its inner wall portion 42d extends outward from below to above the rear functional storage portion V0. Furthermore, as shown in Figures 5 and 6, the second skirt portion S2 is inclined in two stages such that the inner wall portion 42d of its double wall portion E widens outward from bottom to top.

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

[0038] Next, with reference to Figures 1 to 7, the operation of the flush toilet 1 according to the embodiment of the present invention described above will be explained. First, according to the flush toilet 1 of one embodiment of the present invention, the storage area of ​​the rear functional storage section V0 is divided into upper and lower sections (upper section V1, lower section V2), and the support wall section 48 that supports the functional section (flush water supply device 6) is supported by being joined to the double wall section E of the side wall section 42b of the skirt section 42, thereby improving the strength of both the support wall section 48 and the skirt section 42. 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 removed. 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 to the upper end portion above it in the side wall portion 42b of the skirt portion 42. Therefore, while suppressing the overall external dimensions of the toilet bowl body 4, it is possible to secure a large storage area for the functional parts (washing water supply device 6) in the toilet bowl body 4, and the overall strength of the toilet bowl body 4 can be increased.

[0039] Next, according to the flush toilet 1 of this embodiment, for example, if the entire area above the joint 48d with the support wall 48 in the skirt portion 42 is set as a single wall portion A, a larger storage area can be secured in the rear functional storage portion V0. On the other hand, there is a problem that during manufacturing, a part of the single wall portion A of the skirt portion 42 may be prone to deformation such as distortion due to insufficient strength. Therefore, in the flush toilet bowl 1 of this embodiment, it was 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 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 section E and single wall section A of the side wall section 42b of the skirt section 42 during manufacturing, and also makes it possible to secure a larger storage area for the rear functional storage section V0 while resolving insufficient strength.

[0040] Furthermore, in the flush toilet 1 according to this embodiment, the joint C1 where the bowl portion 8 of the ceramic toilet body 4 and the rear functional storage portion V0 are joined is generally a place where stress concentration and other loads are easily applied due to the weight of the bowl portion 8 itself and the weight of the functional portion (flushing water supply device 6) housed in the rear functional storage portion V0. Therefore, during the manufacturing or transportation of the toilet body 4, if internal or external forces act on 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, the first skirt portion S1, which is 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, is joined to the joint portion C1 between the bowl portion 8 of the toilet body 4 and the rear function storage portion V0. As a result, the strength of the joint portion C1 between the bowl portion 8 and the rear function storage portion V0 can also be improved by the double wall portion E of the first skirt portion S1. Therefore, the rear functional storage section V0 of the toilet bowl body 4 can also be made larger while resolving the lack of strength.

[0041] Furthermore, according to the flush toilet 1 of this embodiment, the double wall portion E of the first skirt portion S1 includes the joint portion C1 between the bowl portion 8 of the toilet body 4 and the rear functional storage portion V0, and the joint portion C2 between the drain trap portion 12 and the support wall portion 48, and is provided in the front region V3 of the rear functional storage portion V0 which is located 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. As a result, the joint C1 between the bowl portion 8 of the toilet body 4 and the front area V3 of the rear functional storage portion V0 can be supported by the double wall portion E of the first skirt portion S1, and the support wall portion 48 that supports the drain trap portion 12 can also 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 support 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. Furthermore, 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 support 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 section 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 due to the structure of its double wall portion E compared to the structure of the single wall portion A of the second skirt portion S2 of the rear region V4 of the rear functional storage section V0. As a result, when moving the toilet body 4 during transport or installation, it becomes easier for workers to hold the structural part of the double wall section E of the first skirt section S1, which is thicker than the single wall section A of the second skirt section S2, thus preventing them from holding the single wall section A of the second skirt section S2, which is weaker than the structural part of the double wall section E of the first skirt section S1.

[0042] Furthermore, in the flush toilet 1 according to this embodiment, the first skirt portion S1 is inclined at a nearly constant angle α1 with respect to the vertical plane L1 such that the inner wall portion 42d of the double wall portion E spreads outward from below to above the rear functional storage portion V0. This makes it difficult for deformation such as distortion to occur. Furthermore, with respect to the second skirt section S2, the inner wall section 42d of its double wall section E is inclined in two stages so as to widen outward from bottom to top, thereby allowing for a larger storage area within the rear functional storage section V0. Furthermore, the constant inclination angle α1 of the inner wall portion 42d of the double wall portion E of the first skirt portion S1 and the two-stage inclined wall portion 42d of the inner 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 transport or installation, it becomes easier for workers to hold the structural part of the double wall section E of the first skirt section S1, which is thicker than the single wall section A of the second skirt section S2, thus preventing them from holding the single wall section A of the second skirt section S2, which has lower strength than the structural part of the double wall section E of the first skirt section S1.

[0043] Furthermore, according to the flush toilet 1 of this embodiment, in the first inclination stage, the second skirt portion S2 is inclined at the same first inclination angle β1 as the inclination angle α1 of the inner wall portion 42d of the first skirt portion S1, such that the wall surface of the inner wall portion 42d of the double wall portion E spreads outward from the joint portion 48d with the lower support wall portion 48 toward the upper deflection position P2, and the inclination of the double wall portion E and the single wall portion A in the first stage is the same. As a result, in the region from the joint 48d with the lower support wall 48 to the upper deflection position P2, the inner wall surfaces 42d of the double wall E of the second skirt portion S2 are formed smoothly without any steps between them. Therefore, in the vicinity of the joint 48d with the support wall portion 48, deformations such as steps and distortions are less likely to occur between the first skirt portion S1 and the second skirt portion S2, thus suppressing insufficient strength of the rear functional storage portion V0. Furthermore, in the second inclination stage, the second skirt portion S2 is inclined at a second inclination angle β2 which is greater than the first inclination angle β1, so that it spreads 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. The inclination of the second skirt portion S2 at the second inclination stage at the second inclination angle β2 can be made to have a shape that spreads outward toward the upper single wall portion A, with the deflection position P2 of the double wall portion E as the base end. This makes it possible to suppress insufficient strength in the transition portion where the second skirt portion S2 transitions from the double wall portion E to the single wall portion A, while also securing a larger storage area within the rear functional storage portion V0. [Explanation of Symbols]

[0044] 1. A flush toilet according to one embodiment of the present invention (a hybrid flush toilet) 2 Main water supply channel 2a Rim-side water supply channel 2b Jet side water supply channel 2c Tank-side water supply channel 2d Pump water supply channel 4. Toilet bowl 6. Washing water supply device (functional unit) 8 Bowl section 10 Rim section 12 Drain trap section 12a Inlet of the drain trap 12b Drain trap riser pipe 12c Drain trap section descending pipe 12d Top of the drain trap section 12e Outlet section of the drain trap 14 Rim water conduit 14a Rim outlet 16. Jet water conduit 16a Jet nozzle 18. Switching valve 20 Water storage tanks 22 Pressure pump 24 Water shut-off valve 26 Branch fittings 26a Power outage switching valve 28 Valve Unit 30 Constant flow valve 32 Diaphragm-type main valve 34 Solenoid valve 36 Controllers 38 Upper float switch 40 Lower float switch 42 Skirt section 42a Rear wall of the skirt section 42b Side wall of the skirt section 42c Outer wall section of the skirt 42d Inner wall of the skirt section 42e Bottom of the skirt section 42f Recess at the bottom of the skirt section 44 connection openings 46 Drain socket storage section 48 Support wall section 48a Joint 48b Horizontal wall 48c Lower wall 48d Outer ends of the lower wall section in the left-right direction, joint 50 Horizontal main wall 50a Left and right side ends of the horizontal main wall section 52 Horizontal auxiliary wall 52a Left and right side ends and joints of the horizontal auxiliary wall section A Single wall section B Branch C1 The joint between the bowl portion of the toilet body and the rear functional storage compartment. C2 Joint between the drain trap section and the support wall section D Drain pipe E Double wall section F Floor I Interior space L1 vertical plane O1 drainage wick P1 The second skirt portion at a predetermined upper position of the double wall portion, P2 deflection position S Drain socket S1 First Skirt Section S2 Second Skirt Section T Tank system (washing water supply system) V0 Rear Functional Storage Compartment V1 Upper area of ​​the rear function storage compartment V2 Lower area of ​​the rear function storage compartment V3 Front area of ​​the upper region of the rear function storage compartment V4 Rear area of ​​the upper part of the rear function storage compartment W0 Main water supply source α1 Inclination angle of the inner wall of the first skirt section β1 First inclination angle of the inner wall portion of the second skirt portion β2 Second inclination angle of the inner wall portion of the second skirt portion

Claims

1. A flush toilet that uses flushing water to wash away waste, A ceramic toilet bowl body comprising a bowl section for receiving waste, and a drain trap section connected to the lower part of the bowl section for discharging waste from the bowl section, This toilet has a functional unit located behind the bowl portion of the toilet body, which includes a function for controlling the flow of flushing water to the bowl portion. The ceramic toilet bowl body further comprises a skirt portion formed outside the respective sides of the bowl portion and the drain trap portion, and a rear functional storage portion provided below the upper end of the skirt portion and inside the skirt portion in the area behind the bowl portion, which is capable of housing at least a part of the functional portion. The rear functional storage section described above is equipped with a support wall that supports the functional section, The above-mentioned skirt portion forms a double wall portion comprising an outer wall portion that forms its outer surface and an inner wall portion provided inside the outer wall portion, and at least a part of this 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 the portion above the joint between the double wall portion and the support wall portion, where the internal space of the double wall portion is removed. The above-mentioned joint 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 angle of inclination of its inner wall surface with respect to the vertical plane that is the same angle of inclination as the inner wall surface of the single wall portion with respect to the vertical plane. A flush toilet characterized in that the above-mentioned support wall portion is joined to the rear wall portion of the above-mentioned skirt portion.

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

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

4. 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 comprises a front region located forward of the drain center, which is the center of the pipe on the outlet side of the drain trap portion, and a rear region located behind this front region. The double wall portion of the first skirt portion described above is provided in the front area of ​​the rear functional storage portion described above. The flush toilet according to claim 3, wherein the single wall portion of the second skirt portion is provided in the rear area of ​​the rear functional storage portion.

5. The double wall portion of the first skirt portion described above is inclined at a nearly constant angle such that the inner wall surface of the skirt portion spreads outward from below to above the rear functional storage portion. The flush toilet according to any one of claims 2 to 4, wherein the second skirt portion is inclined in two stages such that the inner wall surface of the double wall portion widens outward from bottom to top.

6. The flush toilet according to claim 5, wherein the second skirt portion is inclined at the same first inclination angle as the inner wall portion of the first skirt portion in the first inclination stage, such 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 upper deflection position, and thereafter, in the second inclination stage, it is inclined at a second inclination angle greater than the first inclination angle so that it spreads outward from the deflection position toward the upper single wall portion.

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