Water-washable toilet

Abstract

To provide a flush toilet bowl that can improve the ease of handling and fire prevention in the flexible elongated member that connects the supply source that enables water or electricity supply and the functional part, as well as to improve the overall design of the flush toilet bowl.SOLUTION: A flush toilet bowl 1 comprises a ceramic toilet bowl body 4, a functional part 6, a supply source 26 that enables water supply or power supply to this functional part, and a flexible elongated member 54 connecting the supply source and the functional part. The toilet bowl body further includes a rear functional compartment V0 that allows at least part of the functional part to be stored. This rear functional compartment has an upper storage area V1, a lower area V2, and a lower connecting area V3. The flexible elongated member is inserted from the upper storage area into the lower connecting area by extending from its upper connecting end 54b to its lower connecting end 54a, and is extended out of the toilet bowl body from within the lower connecting area without passing through the lower area.SELECTED DRAWING: Figure 7

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, flush toilets that are cleaned with flush water to expel waste include so-called "full skirt" or "full skirt" flush toilets, in which a skirt section is formed outside the sides of the bowl and drain trap sections of the ceramic toilet body and 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 functional part is provided that includes the function of controlling the discharge and stopping of flush water into the bowl part of the toilet body, and this functional part is stored in a storage area behind the bowl part of the toilet body.

[0003] Next, in the conventional flush toilet described in Patent Document 1 mentioned above, a water supply hose, one end of which is connected to a functional section in the rear area of ​​the toilet body, is inserted downward through an opening in the rear wall of the toilet body, and the other end of the water supply hose is connected to a stop valve installed on the floor. Furthermore, in the conventional flush toilet described in Patent Document 2 mentioned above, a through-hole is provided that runs vertically through the support wall that divides the area behind the bowl of the toilet body into upper and lower areas. Components stored in the upper and lower areas divided by the support wall are connected via the through-hole. Furthermore, the conventional flush toilet described in Patent Document 3 above is equipped with a sheath pipe that functions as a water supply hose for supplying flush water or a wiring hose through which wiring for power supply is inserted. One end of this sheath pipe is connected to a functional section in the rear area of ​​the toilet body, and is inserted into a space within a double wall section provided in a side wall section of the toilet body, and then extends to the outside of the toilet body from the space below the toilet body where the outlet of the drain trap is located. The other end of the sheath pipe, when functioning as a water supply hose, is connected to an external stop valve via the space below the toilet body, and when functioning as a wiring hose, is connected to an external power source via the space below the toilet body. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-267026 [Patent Document 2] Japanese Patent Application Laid-Open No. 2014-114632 [Patent Document 3] Japanese Patent Application Publication No. 2017-89282 Summary of the Invention [Problem to be solved by the invention]

[0005] Meanwhile, in recent years, with the diversification of flush toilet designs and improvements in the aesthetics of flush toilets, there has been a demand for ways to effectively utilize the area behind the bowl of the toilet body as a storage area for functional parts while also reducing (slimming down) the overall external dimensions of the toilet body. Furthermore, for example, conventional flush toilets use flexible, elongated members as water supply hoses and wiring hoses connected to the functional part, and these flexible, elongated members are made of a relatively hard, elastic material from the standpoint of durability, etc. For this reason, when installing the flexible, elongated member within the narrow storage area of ​​the functional part of the toilet body, if the flexible, elongated member is bent and subjected to sudden bending deformation, etc., kinks are likely to occur, making it difficult to handle the flexible, elongated member within the storage area of ​​the functional part.

[0006] Furthermore, in conventional flush toilets, the functional part is located relatively high up within the storage area at the rear of the toilet body, but the challenge is to store the functional part as far as possible within the storage area of ​​the toilet body so that it is difficult to see from the outside of the toilet body, both to prevent the unexpected intrusion of waste and other materials into the functional part and also from the standpoint of the aesthetic design of the flush toilet. Furthermore, with regard to the water supply hose and wiring hose connected to the functional part, the connection part with the functional part is located relatively high up within the storage area of ​​the toilet body, while the upstream side of the water supply hose and the power supply side of the wiring hose are connected to a water or electricity supply source (such as a stop valve or power source) located outside, below, the toilet body. From the perspective of not compromising the aesthetic appeal and design of the flush toilet, the issue is how to conceal the routes of the water supply hose and wiring hose within the limited storage area of ​​the toilet body. Furthermore, with regard to the supply source side of the water supply hose and wiring hose, the issue is how to extend them from an insertion hole or the like below the toilet body to an external supply source, and the issue is how to make the size of the insertion hole below the toilet body as small as possible so that the internal functional parts are not visible. Furthermore, from the perspective of the fire resistance of the functional parts and elongated members, when considering, for example, a fire breaking out from behind the wall behind the toilet body or from under the floor below the toilet body, the challenge is how to isolate the storage area that houses the functional parts from the area below this storage area (especially the area where the outlet part of the drain trap part is located, which is easily flammable from the drain pipe side extending from behind the wall or under the floor).

[0007] Therefore, the present invention has been made to solve the problems and desired issues of the prior art mentioned above, and aims to provide a flush toilet that can improve the maneuverability and fire resistance of the flexible, elongated member that connects the functional part to the supply source that enables the supply of water or power, as well as improve the design of the flush toilet as a whole. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems, the present invention provides a flush toilet that is flushed with flush water and discharges waste, comprising a ceramic toilet body having a bowl portion that receives waste, a drain trap portion that includes an inlet portion connected below the bowl portion and an outlet portion for discharging waste within the bowl portion, and a skirt portion formed on the outside of the bowl portion and the drain trap portion, a functional portion that is provided behind the bowl portion of the toilet body and has at least the function of controlling the stop of flush water discharge into the bowl portion, a supply source that is provided below the functional portion and outside the toilet body and enables water or power supply to at least the functional portion, and a flexible, elongated member that connects the supply source to the functional portion, and the ceramic toilet body further comprises a rear functional storage portion that can store at least a part of the functional portion, and the rear functional storage portion divides the area of ​​the toilet body behind the bowl portion into upper and lower areas and supports the functional portion. The toilet comprises a wall portion, an upper storage area formed in an area above the support wall portion and storing at least a part of the functional portion, a lower area formed in an area below the support wall portion so as to be isolated from the upper storage area and in which the outlet of the drain trap portion is located, and a lower communication area formed adjacent to and isolated from the lower area, wherein the lower communication area allows communication between the upper storage area and the outside of the toilet body without communicating with the lower area, and the flexible elongated member has an upper connection end connected to the functional portion and a lower connection end connected to the supply source, and extends from the upper connection end toward the lower connection end so as to be inserted from the upper storage area into the lower communication area, and then extends from the lower communication area to the outside of the toilet body without passing through the lower area, and the lower connection end is connected to the supply source. In the present invention configured in this manner, the flexible, elongated member extends from an upper connection end connected to the functional part of the upper storage area of ​​the rear functional storage part toward a lower connection end, and this flexible, elongated member can be inserted from the upper storage area of ​​the rear functional storage part into the lower communication area without passing through the lower area and without being bent or sharply curved. The elongated member inserted into this lower communication area can then be smoothly extended from the lower communication area to the outside of the toilet body without passing through the lower area of ​​the rear functional storage section, and the lower connection end of the elongated member can be connected to the supply source. As a result, most of the intermediate portion of the flexible, elongated member connecting the functional part and the supply source can be concealed within the upper storage area or lower communication area of ​​the rear functional storage part, thereby improving the design of the flush toilet's appearance, etc. Furthermore, by inserting the flexible elongated member from the upper storage area through the lower communication area without passing through the lower area, it is possible to improve the maneuverability of the elongated member within the limited space of the rear functional storage area of ​​the toilet body while suppressing deformation loads on the elongated member along its path between the functional unit and the supply source, thereby suppressing permanent deformation or damage to the flexible elongated member, such as kinking. Furthermore, the improved maneuverability of the flexible, elongated member allows the rear functional storage section of the toilet body to be made smaller, which means that the entire flush toilet can be made smaller while improving its design. Furthermore, from the standpoint of fire prevention, for example, if a fire were to break out behind the wall behind the toilet body or in the surrounding area under the floor below the toilet body, even if the fire spreads from behind the wall or under the floor to the flammable space in the lower area of ​​the rear functional storage section of the toilet body or downstream of the outlet of the drain trap section, the upper storage area and the lower communication area are each isolated from the lower area. This reduces the risk of fire in the lower area spreading to the functional parts of the upper storage area or the elongated members in the lower communication area, ensuring the fire resistance of the functional parts and the elongated members.

[0009] In the present invention, preferably, the skirt portion has a rear wall portion and a side wall portion which respectively form the back surface and the side surface of the skirt portion, and at least a part of the side wall portion or the rear wall portion of the skirt portion forms a double wall portion which has an outer wall portion which forms the outer surface of the skirt portion and an inner wall portion which is provided on the inside of the outer wall portion, and at least a part of this double wall portion forms a double-walled chamber in the lower communication area of ​​the rear functional storage portion between the outer wall portion and the inner wall portion, and the inner wall portion of the double-walled chamber which forms the double-walled chamber has a penetrating portion which is capable of communicating between the upper storage area and the inside of the double-walled chamber. An inner communicating hole is formed, and an outer communicating hole is formed in the outer wall portion of the double-wall portion that forms the double-wall chamber, allowing communication between the inside of the double-wall chamber and the outside of the toilet body.The flexible elongated member extends from the upper connection end of the upper storage area toward the lower connection end, and is inserted from the upper storage area into the double-wall chamber through the inner communicating hole of the double-wall portion, and then extends from inside the double-wall chamber through the outer communicating hole of the double-wall portion to the outside of the toilet body without passing through the lower area, and then the lower connection end is connected to the supply source. In the present invention configured in this manner, the flexible, elongated member extends from an upper connection end connected to the functional part of the upper storage area of ​​the rear functional storage part toward a lower connection end, and this flexible, elongated member can be inserted into the double-walled chamber through the inner communicating hole of the double-wall part without being bent or sharply curved from the upper storage area of ​​the rear functional storage part. The elongated member can then be smoothly extended from inside the double-walled chamber through the outer communicating hole of the double-walled section to the outside of the toilet body without passing through the lower area of ​​the rear functional storage section, and the lower connecting end of the elongated member can be connected to the supply source. As a result, most of the middle part of the flexible, elongated member connecting the functional part and the supply source can be concealed within the upper storage area of ​​the rear functional storage part or within the double-walled room, thereby improving the design of the flush toilet's appearance, etc. Furthermore, by inserting the flexible elongated member from the upper storage area through the double-walled chamber without passing through the lower area (double-walled chamber), it is possible to improve the ease of handling of the elongated member within the limited space of the rear functional storage area of ​​the toilet body while suppressing deformation loads on the elongated member along its path between the functional area and the supply source, thereby preventing permanent deformation or damage to the flexible elongated member due to, for example, kinking. Furthermore, from the standpoint of fire prevention, for example, if a fire were to break out behind the wall behind the toilet body or in the surrounding area under the floor below the toilet body, even if the fire spreads from behind the wall or under the floor to the flammable space in the lower area of ​​the rear functional storage section of the toilet body or downstream of the outlet of the drain trap section, the upper storage area and lower communication area (double-walled chamber) are each isolated from the lower area. This reduces the risk of a fire in the lower area spreading to the functional parts of the upper storage area or the elongated members in the double-walled room, ensuring the fire resistance of the functional parts of the upper storage area and the elongated members in the double-walled room. Furthermore, even if a foreign object from outside the toilet body enters the lower communication area (double-walled chamber) through the outer communication hole, the lower communication area (double-walled chamber) and the upper storage area are separated at a point other than the inner communication hole, so that the foreign object from outside the toilet body can be prevented from reaching the functional part of the upper storage area through the outer communication hole.

[0010] In the present invention, preferably, the inner wall portion of the double wall portion forming the double-walled chamber has a horizontal wall portion forming an approximately horizontal wall surface, and the inner communicating hole is formed so as to penetrate the approximately horizontal wall surface of the horizontal wall portion, and the outer wall portion of the double wall portion forming the double-walled chamber has a vertical wall portion forming a vertical wall surface extending in the vertical direction, and the outer communicating hole is formed so as to penetrate the vertical wall surface of the vertical wall portion. In the present invention configured in this manner, the inner communication hole in the inner wall portion, which penetrates to allow communication between the upper storage area and the double-walled chamber, is formed so as to penetrate the approximately horizontal wall surface of the horizontal wall portion of the inner wall portion in the double-walled portion, and the outer communication hole in the outer wall portion, which penetrates to allow communication between the inside of the double-walled chamber and the outside of the toilet body, is formed so as to penetrate the vertical wall surface of the vertical wall portion of the outer wall portion in the double-walled portion. As a result, when the elongated member is inserted from within the upper storage area into the inner communicating hole and extended from within the double-walled chamber to the outside of the toilet body through the outer communicating hole, the elongated member does not need to be bent significantly and can be inserted smoothly. Therefore, it is possible to effectively prevent the flexible elongated member from being permanently deformed or damaged due to, for example, kinking.

[0011] In the present invention, preferably, the central axis of the inner communicating hole is positioned rearward of the fore-and-aft center of the horizontal wall portion, and the outer communicating hole is formed in the outer wall portion of the double wall portion in the rear wall portion of the skirt portion. In the present invention configured in this manner, the central axis of the inner communicating hole is positioned rearward of the fore-and-aft center of the horizontal wall portion, and the outer communicating hole is formed in the outer wall portion of the double wall portion in the rear wall portion of the skirt portion.Therefore, the inner communicating hole of the horizontal wall portion can be positioned closer to the rear wall portion of the skirt portion than when the central axis of the inner communicating hole is positioned at the same position as the fore-and-aft center of the horizontal wall portion or in front of it. Therefore, the distance between the inner and outer communication holes can be reduced, which makes it easier to guide the elongated member into each of the inner and outer communication holes when inserting it through each of the inner and outer communication holes, eliminating the need to bend or sharply bend the flexible elongated member. Furthermore, since the central axis of the inner communicating hole is positioned rearward of the fore-and-aft center of the horizontal wall portion, when performing work such as connecting the upper connection end of the elongated member to the functional portion while the elongated member is inserted into the inner communicating hole and the outer communicating hole, there is no need to bend or deform the flexible elongated member significantly so as not to interfere with the front side of the functional portion, etc. As a result, permanent deformation or damage to the flexible elongated member due to kinking or the like can be more effectively prevented. Furthermore, by reducing the distance between the inner communicating hole and the outer communicating hole, the thickness of the double wall portion that forms the double-walled chamber between the inner communicating hole and the outer communicating hole through which the elongated member is inserted can be reduced, thereby making the entire toilet body smaller.

[0012] In the present invention, the double-walled chamber is preferably formed below the upper storage area, and the elongated member is inserted from within the upper storage area into the double-walled chamber through the inner communication hole. In the present invention configured as described above, the elongated member can be smoothly handled by passing it through the double-walled chamber formed below the upper storage area. Furthermore, compared to inserting the insert through a double-walled chamber formed on the side of the upper storage area, the thickness of the side wall of the skirt portion and the horizontal width of the entire toilet body can be reduced, making it possible to make the entire flush toilet smaller.

[0013] In the present invention, preferably, the elongated member has the upper connecting portion connected to the front or side of the functional portion, extends diagonally downward toward the front or side, and then is directed toward the inner communicating hole on the diagonally downward rear side, and is inserted from the inner communicating hole through the double-walled chamber to the outer communicating hole without passing through the lower region, and is guided to the outside of the toilet body. In the present invention configured in this manner, the upper connecting portion of the elongated member is connected to the front or side of the functional portion, and after first extending diagonally downward toward the front or side, is directed toward the inner communicating hole diagonally downward toward the rear. Therefore, the member can be efficiently inserted from the inner communicating hole through the double-walled chamber to the outer communicating hole without passing through the lower region, and can be efficiently guided to the outside of the toilet body. Furthermore, by inserting the flexible elongated member through the double-walled chamber from the upper storage area without passing through the lower storage area, it is possible to reduce deformation loads on the elongated member along its path between the functional unit and the supply source, while further improving the maneuverability of the elongated member within the limited space of the rear functional storage area of ​​the toilet body. This effectively prevents the flexible elongated member from permanently deforming or being damaged, for example, by kinking. [Effects of the Invention]

[0014] The flush toilet of the present invention can improve the maneuverability and fire resistance of the flexible, elongated member that connects the functional part to the supply source that enables the supply of water or power, as well as improve the design of the flush toilet as a whole. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is an overall structural diagram of a flush toilet according to a first embodiment of the present invention. [Figure 2] FIG. 1 is an exploded perspective view of a flush toilet according to a first embodiment of the present invention, viewed from behind and diagonally above. [Figure 3] FIG. 1 is a plan view of a flush toilet according to a first embodiment of the present invention. [Figure 4] FIG. 1 is a rear view of a flush toilet according to a first embodiment of the present invention. [Figure 5] FIG. 5 is a cross-sectional view taken along line VV in FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. [Figure 8] FIG. 8 is a cross-sectional view similar to FIG. 7 of a flush toilet according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] A flush toilet according to a first embodiment of the present invention will be described below with reference to the accompanying drawings. First, the overall structure of a flush toilet according to a first embodiment of the present invention will be explained in outline with reference to Figs. 1 to 3. Figure 1 is a diagram of the overall configuration of a flush toilet according to a first embodiment of the present invention. Figure 2 is an exploded perspective view of the flush toilet according to the first embodiment of the present invention, seen from behind and diagonally above. Figure 3 is a plan view of the flush toilet according to the first embodiment of the present invention. As shown in Figures 1 to 3, the flush toilet 1 according to the first embodiment of the present invention comprises a water supply channel (main water supply channel 2) through which flush water supplied from a main water supply source W0 such as a water line flows, a ceramic toilet body 4, and a flush water supply device 6.

[0017] 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 behind 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 the function of controlling the stop of flush water discharge into the bowl portion 8 of the toilet body 4.

[0018] Next, as shown in FIG. 3, 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 in FIG. 3 from the front side). This rim water channel 14 extends from the rear side of the toilet body 4 to the front inside the rim portion 10 on one side of the toilet body 4 (the right side when looking at the toilet body 4 from the front in Figure 3), and then bends partway back towards the rear, forming a so-called U-turn shape. Furthermore, a rim spout 14a is provided at the downstream end (rear downstream end) of this rim conduit 14. Furthermore, the rim-side water supply passage 2a of the flush water supply device 6 is connected to the upstream side of the rim water conduit 14 of the toilet body 4. Flush water supplied from this rim-side water supply passage 2a to the rim water outlet 14a is discharged rearward from the rim water outlet 14a into the bowl section 8, thereby performing rim spouting.

[0019] 1 and 3, 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 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 inlet 12a of the drain trap section 12, thereby causing jet water to be discharged. 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 switching valve 18 at branch point B of the main water supply passage 2. On the other hand, as shown in Figure 1, the upstream side of the jet side water supply passage 2b of the flush water supply device 6 is connected to the pressure pump 22 of the flush water supply device 6, which is provided downstream of the water storage tank 20 of the flush water supply device 6.

[0020] 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 12e of the downcomer pipe 12c of the drain trap portion 12 is connected to the inlet of a drain socket S located at the rear and below of the toilet body 4. Furthermore, as shown in Figure 1, the outlet on the rear side of the drain socket S is connected to the inlet of a drain pipe D extending from the rear wall (not shown) side of the toilet body 4. This allows wastewater discharged from the outlet 12e of the drain trap part 12 of the toilet body 4 to be discharged from the drain socket S into the drain pipe D on the wall side, resulting in a drainage form known as "wall-side drainage." 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 portion 12e of the drain trap portion 12 of the toilet body 4 is discharged from the drain socket S into a drain pipe below the installation surface (floor surface F) of the bottom of the toilet body 4.

[0021] Next, each component of the flush water supply device 6 of the flush toilet 1 according to this embodiment will be explained in outline using FIG. First, as shown in FIG. 1, the flush water supply device 6 comprises, 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 water supply pipe elbow 28a, 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.

[0022] Furthermore, the constant flow valve 30 of the valve unit 28 is used to restrict 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 branch fitting 26, for example, in a configuration in which a sanitary private washing device (not shown) is provided for the flush toilet 1, it is also possible to connect a water supply pipe (not shown) for supplying washing water to the sanitary private washing device (not shown). If the private parts sanitary washing device (not shown) is omitted, the branch fitting 26 may also be omitted. 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 point 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, and the ratio of the amount of water supplied to the rim side and the tank side can be changed as desired.

[0023] 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 point B on the downstream side of the main water supply channel 2, there are provided a rim side water supply channel 2a that communicates with the rim water conduit 14 of the toilet body 4, and a tank side water supply channel 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 point 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.

[0024] Furthermore, the flush 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 downstream from the pressure pump 22. As a result, in the flush toilet 1 of this embodiment, flush water supplied from the main water supply channel 2 under direct water supply pressure is supplied from the rim-side water supply channel 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 then 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, making it a so-called hybrid flush toilet 1.

[0025] 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 that the upper float switch 38 is on 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 drops to a predetermined water level that is lower than the predetermined 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.

[0026] With this structure, during normal toilet flushing, the controller 36 detects the user's operation of the toilet flush switch (not shown), and activates the solenoid valve 34, the switching valve 18, and the pressure pump 22 in sequence. This causes water to start being 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 section 8 is discharged from the drain trap section 12 together with the dirt in the bowl section 8. Furthermore, after flushing is completed, the controller 36 opens the electromagnetic 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 storage tank 20 rises and the upper float switch 38 detects the specified amount of water stored, 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 stored in a rear functional storage section V0 (details will be described later) in the area behind the bowl section 8 of the toilet body 4.

[0027] Next, with reference to Figures 2 to 7, we will explain in detail 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. First, Fig. 4 is a rear view of a flush toilet according to a first embodiment of the present invention. Next, Fig. 5 is a cross-sectional view taken along line VV in Fig. 4. Also, Fig. 6 is a cross-sectional view taken along line VI-VI in Fig. 3. Furthermore, Fig. 7 is a cross-sectional view taken along line VII-VII in Fig. 3. Here, in the flush toilet 1 of this embodiment shown in Figures 5 to 7, the flush water supply device 6 is not shown and has been omitted.

[0028] 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. Additionally, the rear function storage section V0 of the toilet body 4 is provided 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. This rear functional storage section V0 comprises an upper storage area V1, which is a storage area capable of storing at least a part of the cleaning water supply device 6 (functional section), a lower area V2 formed so as to be isolated below the upper storage area V1, and a lower communication area V3 formed so as to be adjacent to and isolated from the lower area V2 and to be capable of communicating below the upper storage area V1. That is, the lower communication region V3 is isolated from the lower region V2 and does not communicate with the lower region V2. On the other hand, the lower communication area V3 is an area that allows communication between the upper storage area V1 and the outside of the toilet body 4.

[0029] Next, as shown in Figures 2 to 7, the skirt portion 42 has a rear wall portion 42a provided on the back surface of the toilet body 4, and side wall portions 42b provided on the left and right side surfaces when viewing the toilet body 4 from the front. A connection opening 44 to which a drain pipe D is connected is formed so as to penetrate in the front-to-rear direction in a lower portion of the rear wall 42a of the skirt portion 42 at the center in the left-right direction when viewed from the front. Furthermore, as shown in Figure 5, a drain socket storage section 46 is formed in the rear function storage section V0 of the toilet body 4, in front of the connection opening 44 in the lower area V2. This drain socket storage section 46 functions as a storage area that can store the drain socket S connected to the outlet 12e of the downcomer pipe 12c of the drain trap section 12. That is, the outlet portion 12e of the downcomer pipe 12c of the drain trap portion 12 and the drain socket S are arranged in the lower region V2 of the rear function storage portion V0 of the toilet body 4.

[0030] 6 and 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 divides the area behind the bowl section 8 of the toilet body 4 into an upper storage area V1 and a lower area V2. Additionally, the upper storage area V1 of the rear functional storage section V0 is an area that can store at least a portion of the flush water supply device 6 (functional section). Furthermore, the lower area V2 of the rear functional storage section V0 includes opening areas for the connection opening 44 and the drain socket storage section 46, respectively.

[0031] Next, as shown in Figures 5 and 6, the rear wall portion 42a and the side wall portion 42b of the skirt portion 42 form a double wall portion E having an outer wall portion 42c that forms the outer surface of the skirt portion 42 and an inner wall portion 42d that is provided inside this outer wall portion 42c. The double-wall portion E also forms an internal space (double-walled chamber I) between the outer wall portion 42c and the inner wall portion 42d.

[0032] Next, as shown in Figures 6 and 7, the support wall portion 48 of the rear functional storage portion V0 of the toilet body 4 has a main wall portion 48b that divides the area rearward of the bowl portion 8 into an upper storage area V1 and a lower area V2. The support wall 48 also includes an auxiliary wall 48c provided on the outer side of the main wall 48b. The auxiliary wall 48c includes an inner wall 42d of the skirt 42 that separates the upper storage area V1 from the internal space (double-walled chamber I) of the double-walled section E of the skirt 42. Furthermore, as shown in Figures 3, 6 and 7, an inner communication hole 50 is formed on the bottom surface on one of the left and right sides of the auxiliary wall portion 48c (the bottom surface on the right side when viewing the auxiliary wall portion 48c shown in Figure 6 from the rear side), which connects the upper storage area V1 and the lower communication area V3 (the double-wall chamber I of the double-wall portion E of the skirt portion 42). Also, as shown in Figures 2, 4, and 7, in the rear wall portion 42a of the skirt portion 42, the outer wall portion 42c which forms the double-walled chamber I corresponding to the lower communication area V3 has an outer communication hole 52 which connects the lower communication area V3 with the outside of the toilet body 4. Each of these inner communication holes 50 and outer communication holes 52 allows communication between the upper storage area V1 of the rear functional storage section V0 and the outside of the toilet body 4 via the lower communication area V3, without passing through the lower area V2 of the rear functional storage section V0.

[0033] 6 and 7, the auxiliary wall portion 48c in which the inner communication hole 50 is formed includes a horizontal wall portion 48d that forms a substantially horizontal wall surface. As a result, the inner communication hole 50 is formed so as to penetrate the substantially horizontal wall surface of the horizontal wall portion 48d in the vertical direction. 2, 4, and 7, the outer wall portion 42c of the lower communication region V3 (double-walled chamber I) in which the outer communication hole 52 is formed has a vertical wall portion 42e that forms a vertical wall surface extending in the up-down direction. As a result, the outer communication hole 52 is formed to penetrate the vertical wall surface of the vertical wall portion 42e in the front-rear direction. Furthermore, as shown in Figure 7, the central axis A1 of the inner communicating hole 50 is positioned at a position rearward of the center A2 in the fore-and-aft direction of the horizontal plane of the horizontal wall portion 48d, and the outer communicating hole 52 is formed in the outer wall portion 42c of the double wall portion E in the rear wall portion 42a of the skirt portion 42.

[0034] 2 to 4, 6, and 7, the flush toilet 1 of this embodiment is equipped with a water supply hose 54, which is a flexible, elongated member. This water supply hose 54 connects the branch fitting 26 downstream of the stop valve 24 to part of the valve unit 28 of the flush water supply device 6 (water supply pipe elbow 28a). Incidentally, each of the inner communication hole 50 and the outer communication hole 52 described above also functions as a hole through which a water supply hose 54 can be inserted. As shown in Figures 2 to 4, 6 and 7, the water supply hose 54 has a lower connection end 54a that is connected to the branch fitting 26 arranged on the cleaning water supply source side, and an upper connection end 54b that is connected to a part of the valve unit 28 (water supply pipe elbow 28a) of the cleaning water supply device 6. That is, the water supply hose 54 extends from its upper connection end 54b toward its lower connection end 54a, so that it is inserted from within the upper storage area V1 through the inner communication hole 50 into the lower communication area V3 (double-walled chamber I). The water supply hose 54 then extends from within the lower communication area V3 through the outer communication hole 52 to the outside of the toilet body 4 without passing through the lower area V2, and then the lower connection end 54a is connected to a flush water supply source (branch fitting 26) near the floor surface F. In this embodiment, a form in which the upstream side (lower connection end 54a) of the water supply hose 54 is connected to the branch fitting 26 is described, but if the branch fitting 26 is omitted due to circumstances such as omitting a private cleaning device (not shown), the upstream side (lower connection end 54a) of the water supply hose 54 may be directly connected to the stop valve 24.

[0035] 7, the water supply hose 54, more specifically, has its upper connection end 54b connected to a water supply pipe elbow 28a that extends diagonally forward and downward from the side of the valve unit 28 of the flush water supply device 6. The upper connection end 54b of the water supply hose 54 extends obliquely downward toward the front or obliquely downward toward the side, and then is directed toward the inner communication hole 50 obliquely downward toward the rear. The water supply hose 54 is then inserted from the inner communicating hole 50 through the lower communicating area V3 (double-walled chamber I) to the outer communicating hole 52 without passing through the lower area V2, and is guided to the outside of the toilet body 4.

[0036] Next, the operation of the flush toilet 1 according to the first embodiment of the present invention described above will be explained with reference to FIGS. First, in the flush toilet 1 according to the first embodiment of the present invention, the water supply hose 54, which is a flexible, elongated member, extends from the upper connection end 54b, which is connected to a part of the valve unit 28 (water supply pipe elbow 28a) of the flush water supply device 6 in the upper storage area V1 of the rear functional storage section V0, toward the lower connection end 54a. At this time, the water supply hose 54 can be inserted into the lower communication area V3 (double-walled chamber I) through the inner communication hole 50 of the double-wall section E without being bent or sharply bent from the upper storage area V1. Thereafter, the water supply hose 54 can be smoothly extended from the lower communication area V3 (double-walled chamber I) through the outer communication hole 52 of the double-wall section E to the outside of the toilet body 4 without passing through the lower area V2. As a result, most of the middle part of the water supply hose 54's route can be concealed within the upper storage area V1 or the lower communication area V3 (double-walled chamber I), thereby improving the design of the flush toilet 1's appearance, etc. Furthermore, by inserting the flexible water supply hose 54 from within the upper storage area V1 through the lower communication area V3 (double-walled chamber I) without passing through the lower area V2, it is possible to reduce deformation load on the route of the water supply hose 54 between part of the valve unit 28 (water supply pipe elbow 28a) of the flush water supply device 6 and the flush water supply source (branch fitting 26 or stop valve 24), while improving the ease of handling the water supply hose 54 within the limited space of the rear function storage section V0 of the toilet body 4. This also makes it possible to reduce permanent deformation or damage to the flexible water supply hose 54 due to kinking, for example. Furthermore, from the standpoint of fire prevention, for example, if a fire were to break out behind the wall behind the toilet body 4 or in the surrounding area under the floor below the toilet body 4, even if the fire spreads from behind the wall or under the floor to the flammable space in the lower area V2 of the rear functional storage section V0 of the toilet body 4 or downstream of the outlet section 12e of the drain trap section 12, the upper storage area V1 and lower communication area V3 (double-walled chamber I) of the rear functional storage section V0 of the toilet body 4 are each isolated from the lower area V2. This reduces the risk of fire in the lower area V2 spreading to the cleaning water supply device 6 in the upper storage area V1 or the water supply hose 54 in the lower communication area V3 (double-walled chamber I), ensuring the fire resistance of the cleaning water supply device 6 and the water supply hose 54. Furthermore, even if a foreign object from outside the toilet body 4 enters the lower communication area V3 (double-walled chamber I) through the outer communication hole 52, the lower communication area V3 (double-walled chamber I) and the upper storage area V1 are separated at a location other than the inner communication hole 50, so that the foreign object from outside the toilet body 4 can be prevented from reaching the flushing water supply device 6 in the upper storage area V1 through the outer communication hole 52.

[0037] Furthermore, with the flush toilet 1 of this embodiment, the inner communication hole 50 of the inner wall portion 42d, which penetrates to allow communication between the upper storage area V1 and the lower communication area V3 (double-walled chamber I), is formed so as to penetrate the approximately horizontal wall surface of the horizontal wall portion 48d of the inner wall portion 42d in the double-wall portion E, and the outer communication hole 52 of the outer wall portion 42c, which penetrates to allow communication between the lower communication area V3 (double-walled chamber I) and the outside of the toilet body 4, is formed so as to penetrate the vertical wall surface of the vertical wall portion 42e of the outer wall portion 42c in the double-wall portion E. As a result, when the water supply hose 54 is inserted from the upper storage area V1 into the inner communication hole 50 and extended from the lower communication area V3 (double-walled chamber I) through the outer communication hole 52 to the outside of the toilet body 4, there is no need to bend the water supply hose 54 significantly, and it can be inserted smoothly. Therefore, it is possible to effectively prevent the flexible water supply hose 54 from being permanently deformed or damaged due to kinking or the like.

[0038] Furthermore, with the flush toilet 1 of this embodiment, the central axis A1 of the inner communicating hole 50 is positioned rearward of the center A2 of the horizontal wall portion 48d in the front-to-rear direction, and the outer communicating hole 52 is formed in the outer wall portion 42c of the double-wall portion E in the rear wall portion 42a of the skirt portion 42. This allows the inner communicating hole 50 of the horizontal wall portion 48d to be positioned closer to the rear wall portion 42a of the skirt portion 42 than if the central axis A1 of the inner communicating hole 50 was positioned in the same position as the center A2 of the horizontal wall portion 48d in the front-to-rear direction or in a position forward of it. Therefore, the distance between the inner communicating hole 50 and the outer communicating hole 52 can be reduced, making it easier to guide the water supply hose 54 into each communicating hole 50, 52 when it is inserted through the inner communicating hole 50 and the outer communicating hole 52. This eliminates the need to bend the flexible water supply hose 54 sharply, such as by bending it. Furthermore, since the central axis A1 of the inner communicating hole 50 is positioned at a position rearward of the center A2 in the fore-and-aft direction of the horizontal wall portion 48d, when performing work such as connecting the upper connection end 54b of the water supply hose 54 to a part of the valve unit 28 (water supply pipe elbow 28a) of the cleaning water supply device 6 while the water supply hose 54 is inserted into the inner communicating hole 50 and the outer communicating hole 52, there is no need to significantly bend or deform the flexible water supply hose 54 so as not to interfere with the front side of the cleaning water supply device 6, etc. As a result, permanent deformation or damage to flexible water supply hose 54 due to kinking or the like can be more effectively prevented. Furthermore, by reducing the distance between the inner communicating hole 50 and the outer communicating hole 52, the thickness of the double wall portion E that forms the lower communicating area V3 (double wall chamber I) between the inner communicating hole 50 and the outer communicating hole 52, through which the water supply hose 54 is inserted, can be reduced, thereby making it possible to make the entire toilet body 4 smaller.

[0039] Furthermore, with the flush toilet 1 of this embodiment, the water supply hose 54 can be routed smoothly by passing it through the lower communication area V3 (double-walled chamber I) formed below the upper storage area V1. Furthermore, compared to inserting the double-walled chamber I formed on the side of the upper storage area V1, the thickness of the side wall portion 42b of the skirt portion 42 and the overall horizontal width of the toilet body 4 can be reduced, making it possible to make the entire flush toilet 1 smaller (slimmer).

[0040] Furthermore, in the flush toilet 1 of this embodiment, the upper connection end 54b of the water supply hose 54 is connected to the front or side of the flush water supply device 6, and after first extending diagonally downward toward the front or diagonally downward toward the side, is directed toward the inner communicating hole on the diagonally downward rear side, so that the water can be efficiently inserted from the inner communicating hole 50 through the lower communicating area V3 (double-walled chamber I) to the outer communicating hole 52 without passing through the lower area V2, and can be efficiently guided to the outside of the toilet body 4. Furthermore, by inserting the flexible water supply hose 54 from the upper storage area V1 through the lower communication area V3 (double-walled chamber I) without passing through the lower area V2, it is possible to further improve the maneuverability of the water supply hose 54 within the limited space of the rear function storage section V0 of the toilet body 4, while suppressing deformation load on the intermediate path of the water supply hose 54 between part of the valve unit 28 (water supply pipe elbow 28a) of the flushing water supply device 6 and the flushing water supply source (branch fitting 26 or stop valve 24). Therefore, permanent deformation or damage to the flexible water supply hose 54 due to kinking or the like can be effectively prevented.

[0041] Next, a flush toilet 100 according to a second embodiment of the present invention will be explained with reference to FIG. Figure 8 is a cross-sectional view of a flush toilet according to a second embodiment of the present invention, similar to Figure 7. Here, in the flush toilet 100 according to the second embodiment of the present invention shown in Figure 8, the same parts as those in the flush toilet 1 according to the first embodiment of the present invention shown in Figure 7 have been given the same reference numerals, and explanation of these will be omitted, with only the different structural parts being explained. First, as shown in Figure 8, in the toilet body 104 of a flush toilet 100 according to the second embodiment of the present invention, the auxiliary wall portion 148a of the support wall portion 148 in which the inner communicating hole 150 is formed is equipped with a vertical wall portion 148b that forms a vertical wall surface that extends in the up-down direction. As a result, the inner communicating hole 150 is formed so as to penetrate the vertical wall surface of this vertical wall portion 148b in the front-to-rear direction. As shown in FIG. 8, an outer communication hole 152 is formed in the outer wall portion 142a of the skirt portion 142 that forms the lower communication region V103 (double-walled chamber I).

[0042] According to the flush toilet 100 of the second embodiment of the present invention described above, when the water supply hose 54 is inserted from within the upper storage area V101 into the inner communication hole 150 and extended from within the lower communication area V103 (double-walled chamber I) through the outer communication hole 152 to the outside of the toilet body 4, there is no need to bend the water supply hose 54 significantly, and it can be inserted smoothly. Furthermore, since the distance between the inner communication hole 150 and the outer communication hole 152 in the front-to-rear direction can be reduced, the entire toilet body 104 can be made smaller while ensuring the upper storage area V101. Furthermore, by reducing the distance between the inner communicating hole 150 and the outer communicating hole 152 in the front-to-back direction, when inserting the water supply hose 54 into the inner communicating hole 150 and the outer communicating hole 152, it is easier to guide the water supply hose 54 into each communicating hole 150, 152, so there is no need to bend the flexible water supply hose 54 sharply, such as by bending it. Therefore, it is possible to effectively prevent the flexible water supply hose 54 from being permanently deformed or damaged due to kinking or the like.

[0043] In the flush toilet 1,100 according to the first and second embodiments of the present invention described above, a configuration in which a water supply hose 54 is used as a flexible, elongated member has been described, but this is not limited to such a configuration and other configurations are also applicable. For example, another form of flexible elongated member may be one in which two water supply hoses are used: a toilet flushing water supply hose 54 that supplies flushing water for toilet flushing to the flushing water supply device 6, and a local cleansing water supply hose that supplies flushing water for local cleansing to a local cleansing device (not shown), and these two water supply hoses are inserted into the inner communicating holes 50, 150 and the outer communicating holes 52, 152, respectively. Alternatively, as yet another form of flexible elongated member, it may be applied to a wiring hose through which multiple power supply wires are inserted to supply power to a flushing water supply device 6, a personal washing device (not shown), a cold climate heater device (not shown), etc., arranged in the toilet body 4, 104, and this wiring hose may be inserted through each of the inner communicating holes 50, 150 and the outer communicating holes 52, 152. [Explanation of symbols]

[0044] 1. Flush toilet according to the first embodiment of the present invention (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 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 the drain trap 14 Rim Waterway 14a Rim Spout 16 Jet Waterway 16a Jet water outlet 18 Switching valve 20 Water Tank 22 Pressure pump 24 Stop valve (supply source) 26 Branch fitting (supply source) 28 Valve unit 28a Water supply pipe elbow 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 Vertical wall section 44 Connection opening 46 Drain socket storage compartment 46a Side wall of drain socket storage area (first side wall) 46b Top of drain socket storage area 48 Support wall section 48a Joint 48b Main wall 48c Auxiliary wall section 48d horizontal wall section 50 Inner communicating hole 52 Outside communication hole 54 Water supply hose (flexible, elongated member) 54a Lower connection 54b Upper connection 100 Flush toilet according to the second embodiment of the present invention 104 Toilet body 142 Skirt Club 142a Outer wall of skirt 148 Support wall section 148a Auxiliary wall section 148b Vertical wall section 150 Inner communicating hole 152 Outside communication hole A1 Central axis of inner communicating hole A2 Center of the horizontal surface of the horizontal wall in the front-to-back direction B Branch D Drain pipe E Double wall section F Floor I Interior space (double wall room) S drain socket T-tank device V0 Rear functional storage area V1 Upper storage area V2 lower area V3 lower communication area W0 Main water supply

Claims

1. A ceramic flush toilet, A bowl portion and a drain trap portion connected below the bowl portion; and a skirt portion formed on the outside of the bowl portion and the drain trap portion when the sink is installed on a floor surface, The skirt portion has a connection opening at its rear portion for passing a drain pipe connected to the outlet portion of the drain trap portion, The flush toilet is provided with a support wall that divides the area behind the bowl into an upper storage area and a lower area, Furthermore, the support wall portion includes a substantially horizontal main wall portion that connects the drain trap portion and the skirt portion and supports the drain trap portion, the connection opening is continuous with the support wall portion, The skirt portion has an outer communication hole formed at the rear portion for inserting at least one of a water supply hose and a wiring hose into the inner portion, the outer communication hole is provided below an upper edge of the connection opening and does not communicate with the lower region, the upper storage area is formed in an area above the support wall and stores at least a part of the functional unit, At least one of the water supply hose and the wiring hose is connected to the functional part through an inner communication hole formed in the support wall part, the inner communication hole is provided below the main wall portion and does not communicate with the lower region, A flush toilet wherein the inner communication hole communicates with the upper storage area.

2. 2. The flush toilet according to claim 1, wherein the inner communication hole is formed in a substantially horizontal wall surface of the support wall portion.

3. 2. The flush toilet according to claim 1, wherein the inner communication hole is formed in a vertical wall surface extending in the up-down direction of the support wall portion.

4. 4. The flush toilet according to claim 3, wherein the inner communication hole and the outer communication hole communicate with each other in the front-to-rear direction in a side view.

5. 2. The flush toilet according to claim 1, wherein the support wall portion comprises a horizontal wall portion that forms a substantially horizontal wall surface, and a vertical wall portion that forms a vertical wall surface that extends in the vertical direction.

6. 6. The flush toilet according to claim 5, wherein the inner communication hole is formed in the horizontal wall portion or the vertical wall portion.

Images