Flush toilet

Abstract

To provide a flush toilet capable of increasing strength while ensuring designability and productivity of an entire toilet body, and capable of 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 includes a support wall 48 in which a rear functional storage part V0 that allows a functional unit 8 in a toilet body 4 to be stored and partitions the storage area up and down and supports the functional unit. An inner wall portion 42d of a double wall portion E of a skirt part 42 of the toilet body includes an upper inner wall portion 50 and a lower inner wall portion 52. In a rear support area A1 of the rear functional storage part, a horizontal first distance L1 from an outer joint C1 of the support wall to an inner joint C2 is set to be shorter than a second horizontal distance L2 from an outer wall part 42c of the double wall part E of the skirt part 42 to an inner joint of the support wall. This second distance is set to the maximum width dimension in the horizontal direction of an internal space I of the double wall portion of the skirt part.SELECTED DRAWING: Figure 5

Description

[Technical field]

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

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

[0003] [Patent Document 1] Patent No. 6691659 (JP 2017-89282 A) [Patent Document 2] JP 2014-114632 A Summary of the Invention [Problem to be solved by the invention]

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

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

[0006] In order to solve the above-mentioned problems, the present invention provides a flush toilet that is flushed with flushing water to discharge waste, comprising a ceramic toilet body having a bowl portion that receives waste, and a drain trap portion having an inlet portion connected to the bottom of the bowl portion to discharge the waste within the bowl portion; and a functional section provided rearward of the bowl section of the toilet body and having the function of controlling the discharge and stopping of flush water into the bowl section, the ceramic toilet body further comprising a skirt section formed outward of the respective side surfaces of the bowl section and the drain trap section, and a rear functional storage section provided below the upper end of the skirt section in the area rearward of the bowl section and inside the skirt section, enabling at least a part of the functional section to be stored, the rear functional storage section comprising a support wall section which divides the storage area into upper and lower sections and which supports the functional section, the skirt section forming a double wall section comprising an outer wall section which forms its outer surface and an inner wall section which is provided inside the outer wall section, and the two At least a portion of the double wall portion forms an internal space between the outer wall portion and the inner wall portion, and the inner wall portion of the double wall portion of the skirt portion comprises an upper inner wall portion extending upward from an outer joint located on the left and right outer side of the support wall portion, and a lower inner wall portion extending downward from an inner joint located on the left and right inner side of the outer joint of the support wall portion, and the rear functional storage portion comprises a rear support area in which a first horizontal left-right distance from the outer joint to the inner joint of the support wall portion is shorter than a second horizontal left-right distance from the outer wall portion of the double wall portion of the skirt portion to the inner joint of the support wall portion, and the second distance is set to the maximum left-right width dimension of the internal space of the double wall portion. In the present invention configured in this manner, a first horizontal left-right distance from the outer joint to the inner joint of the support wall portion in the rear support area of ​​the rear functional storage section is shorter than a second horizontal left-right distance from the outer wall portion of the double wall portion of the skirt portion to the inner joint of the support wall portion, and this second distance is set to the maximum left-right width dimension of the internal space of the double wall portion of the skirt portion.Therefore, the upper inner wall portion and lower inner wall portion of the double wall portion of the skirt portion, which are joined respectively to the outer joint and inner joint of the support wall portion, can securely hold the support wall portion from above and below, thereby increasing the strength of the rear support area of ​​the rear functional storage section. In addition, since deformation such as distortion of the support wall of the rear support area of ​​the rear functional storage section can be suppressed, deterioration in strength of the rear functional storage section and the entire toilet body and effects on appearance can be suppressed. As a result, it is possible to reduce the external dimensions of the entire toilet body while ensuring a large storage area for functional parts in the toilet body, and it is possible to increase the strength of the entire toilet body while ensuring design and productivity.

[0007] In the present invention, preferably, the rear functional storage section has a front support area provided forward of the rear support area, and in this front support area, the support wall portion is joined to a joint portion where the upper inner wall portion and the lower inner wall portion of the double wall portion of the skirt portion are joined. In the present invention configured in this manner, the support wall portion in the front support area of ​​the rear functional storage section is joined to the joint where the upper inner wall portion and the lower inner wall portion of the double wall portion of the skirt section are joined, so that the support wall portion in the front support area of ​​the rear functional storage section can be securely held from the top and bottom directions by each of the upper inner wall portion and the lower inner wall portion of the double wall portion of the skirt section. Therefore, the strength of the support wall portion itself in the forward support area of ​​the rear functional storage portion can be ensured, and the strength of the joint between the support wall portion and the upper inner wall portion and the lower inner wall portion of the double wall portion of the skirt portion can also be ensured. This makes it possible to suppress deformation such as distortion of the support wall in the front support area of ​​the rear functional storage section, thereby suppressing deterioration in the strength of the rear functional storage section and the entire toilet body, and preventing any impact on the appearance.

[0008] In the present invention, the rear support region is preferably provided rearward of a joint between the drain trap portion and the support wall portion. In the present invention configured in this manner, the support wall portion supporting the drain trap portion is susceptible to deformation such as distortion in the peripheral areas of the joint with the drain trap portion due to the weight of the drain trap portion; however, since the strength of the joints between the support wall portion and the upper inner wall portion and the lower inner wall portion of the double wall portion of the skirt portion in the rear support area of ​​the rear functional storage portion is increased, the effects of deformation such as distortion of the support wall portion in the peripheral areas of the joint with the drain trap portion can be suppressed. In addition, with regard to the support wall portion in the rear support area of ​​the rear functional storage portion, which is located rearward of the joint between the drain trap portion and the support wall portion, its rear portion and left and right side portions are joined to the rear and left and right side skirt portions of the drain trap portion, thereby suppressing deformation such as distortion. Therefore, the strength of the support wall portion in the rear support area of ​​the rear functional storage portion can be improved, thereby effectively suppressing a decrease in strength of the rear functional storage portion and the entire toilet body and the impact on the appearance.

[0009] In the present invention, preferably, the support wall portion comprises an upper horizontal wall portion joined to the drain trap portion, a vertical wall portion joined to the outside of the upper horizontal wall portion and extending downward, and a lower horizontal wall portion provided below the upper horizontal wall portion and joined to the vertical wall portion, and the lower inner wall portion of the double wall portion of the skirt portion is joined to the support wall portion so as to extend from the joint between the vertical wall portion and the lower horizontal wall portion of the support wall portion toward the downward region. In the present invention configured in this manner, a vertical wall portion is provided between the upper horizontal wall portion and the lower horizontal wall portion for the support wall portion of the rear functional storage section, so that the storage area within the rear functional storage section can be shaped with a step between the upper horizontal wall portion and the lower horizontal wall portion, thereby making it possible to secure a larger storage area within the rear functional storage section. In addition, in order to ensure a larger storage area within the rear functional storage section, even if there is a step in the shape, the lower inner wall portion of the double wall portion of the skirt portion is joined to the support wall portion so as to extend from the joint between the vertical wall portion and the lower horizontal wall portion of the support wall portion toward the lower area, and therefore the strength of the support wall portion of the rear functional storage section can be ensured by the lower inner wall portion of the double wall portion of the skirt portion. Therefore, it is possible to suppress a decrease in strength of the rear functional storage section and the entire toilet body, and an effect on the appearance.

[0010] In the present invention, the lower inner wall portion of the double wall portion of the skirt portion is preferably formed so that at least a part of its lower end portion extends to the installation surface on which the toilet body is installed. In the present invention configured in this manner, at least a portion of the lower end portion of the lower-inner wall portion of the double wall portion of the skirt portion is formed to extend to the installation surface on which the toilet body is installed, so that the lower-inner wall portion of the double wall portion of the skirt portion is stably supported by the installation surface. This enables the lower inner wall portion of the double wall portion of the skirt portion to support the support wall portion even more stably, thereby ensuring the strength of the support wall portion of the rear functional storage section. Therefore, it is possible to suppress a decrease in strength of the rear functional storage section and the entire toilet body, and an effect on the appearance. Effect of the Invention

[0011] According to the flush toilet of the present invention, it is possible to ensure a large storage area for functional parts in the toilet body while suppressing the external dimensions of the entire toilet body, and it is possible to increase the strength of the entire toilet body while ensuring design and productivity. [Brief description of the drawings]

[0012] [Figure 1] 1 is an overall configuration diagram of a flush toilet according to an embodiment of the present invention. [Diagram 2] FIG. 1 is a plan view of a flush toilet according to an embodiment of the present invention. [Diagram 3]FIG. 1 is an exploded perspective view of a flush toilet according to an embodiment of the present invention, viewed from behind and diagonally above. [Figure 4] FIG. 2 is a rear view of a flush toilet according to an embodiment of the present invention. [Diagram 5] FIG. 3 is a cross-sectional view taken along line VV in FIG. [Figure 6] FIG. 3 is a cross-sectional view taken along line VI-VI in FIG. [Figure 7] FIG. 3 is a cross-sectional view taken along line VII-VII in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] A flush toilet according to one embodiment of the present invention will now be described with reference to the accompanying drawings. First, the overall structure of a flush toilet according to one embodiment of the present invention will be explained generally with reference to Figs. 1 to 3. Fig. 1 is a diagram showing the overall configuration of a flush toilet according to one embodiment of the present invention. Fig. 2 is a plan view of a flush toilet according to one embodiment of the present invention. Fig. 3 is an exploded perspective view of a flush toilet according to one embodiment of the present invention, seen from behind and diagonally above. As shown in Figures 1 to 3, a flush toilet 1 according to one embodiment of the present invention comprises a water supply passage (main water supply passage 2) through which flush water supplied from a main water supply source W0 such as a water line passes, a ceramic toilet body 4, and a flush water supply device 6.

[0014] Next, as shown in Figures 1 to 3, the toilet body 4 comprises a bowl portion 8 for receiving waste, a rim portion 10 formed on the upper edge of the bowl portion 8, and a drain trap portion 12 extending from the bottom of the bowl portion 8. 1 to 3, the flush water supply device 6, details of which will be described later, is provided rearward of the bowl portion 8 of the toilet body 4, and is a functional part that enables flush water supplied from the main water supply passage 2 to be supplied to the toilet body 4. More specifically, this functional part is powered by electricity, and includes a function for controlling the stop of the discharge of flush water into the bowl portion 8 of the toilet body 4.

[0015] Next, as shown in FIG. 2, a rim water channel 14 is formed inside the rim portion 10 on one of the left and right sides of the toilet body 4 (the right side when looking at the toilet body 4 from the front side). This rim water conduit 14 extends from the rear side of the toilet body 4 towards the front inside the rim section 10 on one of the left and right sides of the toilet body 4 (the right side when looking at the toilet body 4 from the front side), and then bends towards the rear halfway, forming a so-called U-turn shape. A rim spout 14a is provided at the downstream end of this rim water conduit 14 (the downstream rear end). Furthermore, the rim side water supply passage 2a of the flush water supply device 6, which will be described in detail later, is connected to the upstream side of the rim water conduit 14 of the toilet body 4. Flush water supplied to the rim water outlet 14a from this rim side water supply passage 2a is discharged rearward from the rim water outlet 14a into the bowl section 8, thereby performing rim spouting.

[0016] 1 and 2, a jet water conduit 16 is formed from the outer surface to the bottom of the bowl portion 8 of the toilet body 4. The downstream side of this jet water conduit 16 is directed toward the inlet portion 12a of the drain trap portion 12 at the bottom of the bowl portion 8, and a jet water outlet 16a is provided at the downstream end of the jet water conduit 16. Additionally, upstream of the jet water conduit 16 of the toilet body 4, there is provided a jet side water supply conduit 2b of the flush water supply device 6, which will be described in detail later. Flush water supplied from this jet side water supply conduit 2b to the jet water conduit 16 of the toilet body 4 is discharged from the jet water outlet 16a towards the drain trap section 12, so that jet water spouting is performed. Here, as shown in FIG. 1, the upstream side of the rim-side water supply passage 2a of the flush water supply device 6 is connected to a changeover valve 18 (described in detail later) at the branch point B of the main water supply passage 2. On the other hand, as shown in FIG. 1, the upstream side of the jet side water supply passage 2b of the cleaning water supply device 6 is connected to a pressure pump 22 (details of which will be described later) of the cleaning water supply device 6, which is provided downstream of the water storage tank 20 of the cleaning water supply device 6.

[0017] Next, the drain trap section 12 of the toilet body 4 consists of an inlet section 12a provided at the bottom of the bowl section 8, an ascending pipe 12b rising from this inlet section 12a, and a descending pipe 12c descending from this ascending pipe 12b, with the top section 12d being between the ascending pipe 12b and the descending pipe 12c. As shown in FIG. 1, the outlet portion 12e of the downcomer pipe 12c of the drain trap portion 12 is connected to the inlet portion of a drain socket S disposed at the rear and below of the toilet body 4. 1, the outlet portion on the rear side of the drain socket S is connected to the inlet portion of the drain pipe D extending from the rear wall (not shown) side of the toilet body 4. This results in a so-called "wall-side drainage" drainage form in which wastewater discharged from the outlet portion 12e of the drain trap portion 12 of the toilet body 4 is discharged from the drain socket S to the drain pipe D on the wall side. Furthermore, the flush toilet 1 of this embodiment is not limited to this type of "wall-side drainage" drainage configuration, but can also be applied to a so-called "floor-side drainage" drainage configuration in which wastewater discharged from the outlet 12e of the drain trap section 12 of the toilet body 4 is discharged from the drain socket S to a drain pipe below the installation surface (floor surface F) of the bottom of the toilet body 4.

[0018] Next, each component of the flush water supply device 6 of the flush toilet 1 according to the present embodiment will be explained generally with reference to FIG. First, as shown in FIG. 1, the flush water supply device 6 is provided with, from the upstream side to the downstream side of the main water supply passage 2, a stop valve 24, a branch fitting 26, a valve unit 28, and a switching valve 18. Next, the valve unit 28 includes a constant flow valve 30, a diaphragm type main valve 32, and an electromagnetic valve 34 such as a solenoid valve. The cleaning water supply device 6 also includes a controller 36. The controller 36 is capable of functioning as a control unit that controls the opening and closing operation of the on-off valve (solenoid valve 34) of the valve unit 28, the switching operation of the switching valve 18, and the rotation speed and operating time of the pressure pump 22.

[0019] Furthermore, the constant flow valve 30 of the valve unit 28 is for restricting the flush water that has passed from the stop valve 24 in the main water supply passage 2 through the branch fitting 26 to a predetermined flow rate or less. Incidentally, in the case where a genital sanitary washing device (not shown) is provided for the flush toilet 1, the branch fitting 26 can also be connected to a water supply pipe (not shown) for supplying washing water to the genital sanitary washing device (not shown). Furthermore, in the valve unit 28, when the solenoid valve 34 is opened under the control of the controller 36, the main valve 32 opens, and the flushing water that has passed through the main valve 32 from the constant flow valve 30 is supplied to the switching valve 18 at the branch B downstream of the main water supply line 2. Here, the switching valve 18 is capable of supplying flushing water from the main water supply passage 2 to both the rim side water supply passage 2a and the tank side water supply passage 2c at the same time, making it possible to arbitrarily change the ratio of the amount of water supplied to the rim side and the tank side.

[0020] Next, the flush water supply device 6 is equipped with a tank device T that enables flush water supplied from the main water supply passage 2 to be supplied to the toilet body 4. This tank device T is equipped with a water storage tank 20 that is connected to the rear of the toilet body 4 and stores the flush water supplied from the main water supply passage 2, and a pump (pressurizing pump 22) that pressure-feeds the flush water in this water storage tank 20 to the toilet body 4. Furthermore, downstream of the branch B on the downstream side of the main water supply passage 2, there are provided a rim side water supply passage 2a that communicates with the rim water passage 14 of the toilet body 4, and a tank side water supply passage 2c that is connected to the water storage tank 20. As a result, the flush water supplied from the main water supply source W0 to the branch B of the main water supply passage 2 is used as at least one of the rim water supply to the rim side water supply passage 2a and the tank water supply to the tank side water supply passage 2c.

[0021] Furthermore, the wash water supply device 6 is provided with a pump water supply passage 2d that extends from the downstream side of the tank side water supply passage 2c to the pressure pump 22, and a jet side water supply passage 2b that extends from the pressure pump 22 to the downstream side. As a result, in the flush toilet 1 of this embodiment, flush water directly pressurized by the water supply is supplied from the main water supply passage 2 and is supplied from the rim side water supply passage 2a of the flush water supply device 6 through the rim water conduit 14 of the toilet body 4 to the rim water outlet 14a, making it possible for water to be discharged from the rim water outlet 14a (so-called "rim water discharge"). Furthermore, the flush water supplied from the main water supply passage 2 to the flush water supply device 6 passes through the tank side water supply passage 2c, the water storage tank 20, the pump water supply passage 2d and the pressure pump 22 of the flush water supply device 6, and is then supplied from the jet side water supply passage 2b through the jet water conduit 16 of the toilet body 4 to the jet water outlet 16a, making it possible for water to be discharged from the jet water outlet 16a (so-called ``jet water discharge''). In other words, the flush toilet 1 of this embodiment is capable of using both rim spouting of flush water directly pressurized from the main water supply line 2, and jet spouting of flush water pressurized by the pressure pump 22 from the water storage tank 20, and is designed to function as a so-called hybrid flush toilet 1.

[0022] Next, an upper float switch 38 and a lower float switch 40 are respectively disposed inside the water storage tank 20. The water level inside the water storage tank 20 can be detected by these float switches 38, 40. For example, the upper float switch 38 switches on when the water level in the water tank 20 reaches a predetermined water level, and the controller 36 detects the on state of the upper float switch 38 and closes the solenoid valve 34. On the other hand, the lower float switch 40 switches on when the water level in the water tank 20 drops to a predetermined water level that is lower than the predetermined stored water level detected by the upper float switch 38, and the controller 36 detects the on state of the lower float switch 40 and stops the pressure pump 22. In addition, the pressure pump 22 draws flush water stored in the water storage tank 20 into the pump water supply passage 2d, and pressurizes the flush water from this pump water supply passage 2d into the jet side water supply passage 2b, thereby discharging it from the jet water outlet 16a.

[0023] With this structure, during normal toilet flushing, the controller 36 detects the operation of the toilet flush switch (not shown) by the user, and sequentially activates the solenoid valve 34, the switching valve 18, and the pressure pump 22. This causes water to begin to be discharged sequentially from the rim water outlet 14a and the jet water outlet 16a, and the cleaning water that has cleaned the inside of the bowl portion 8 is discharged from the drain trap portion 12 together with the waste in the bowl portion 8. Furthermore, after flushing is completed, the controller 36 opens the solenoid valve 34, the switching valve 18 is switched to the tank side water supply passage 2c side, and flush water in the main water supply passage 2 is replenished to the water storage tank 20. When the water level in the water tank 20 rises and the upper float switch 38 detects the specified water level, the controller 36 closes the solenoid valve 34, causing the main valve 32 to close the main water supply line 2 and stopping the water supply. Furthermore, each of these devices of the flush water supply device 6 (functional section) is adapted to be stored in a rear functional storage section V0 (details of which will be described later) in the area rearward of the bowl section 8 of the toilet body 4.

[0024] Next, with reference to Figures 2 to 7, the rear function storage section V0 in which the flush water supply device 6 (functional section) is stored in the toilet body 4 of the flush toilet 1 according to this embodiment, and the surrounding structure of this rear function storage section V0 will be specifically explained. First, Fig. 4 is a rear view of a flush toilet according to one embodiment of the present invention. Also, Fig. 5 is a cross-sectional view taken along line VV in Fig. 2. Furthermore, Fig. 6 is a cross-sectional view taken along line VI-VI in Fig. 2. Also, Fig. 7 is a cross-sectional view taken along line VII-VII in Fig. 2. Here, in the flush toilet 1 of this embodiment shown in Figs. 4 to 7, the flush water supply device 6 is not shown and has been omitted.

[0025] First, as shown in Figs. 2 to 7, the toilet body 4 is provided with a skirt portion 42 formed outside the respective side surfaces of the bowl portion 8 and the drain trap portion 12 thereof. In addition, the rear functional storage section V0 of the toilet body 4 is located below the upper end of the skirt section 42 and inside the skirt section 42 in the area rearward of the bowl section 8 of the toilet body 4, forming a storage area capable of storing at least a portion of the flushing water supply device 6 (functional section).

[0026] Next, as shown in Figures 2 to 7, the skirt portion 42 includes a rear wall portion 42a provided on the rear surface of the toilet body 4, and side wall portions 42b provided on the left and right sides when the toilet body 4 is viewed from the front. 5 to 7, each of the rear wall 42a and the side wall 42b of the skirt 42 includes an outer wall 42c that forms the outer surface of the skirt 42 and an inner wall 42d that is provided inside the outer wall 42c, and the outer wall 42c and the inner wall 42d form a double wall E. The double wall E forms an internal space I between the outer wall 42c and the inner wall 42d.

[0027] A connection opening 44 for connecting a drain pipe D is formed in a lower portion of the rear wall portion 42a of the skirt portion 42 at the center left and right when viewed from the front, so as to penetrate in the front-rear direction. 4 to 7, a drain socket storage section 46 is formed in front of the connection opening 44 in the left-right central and lower area of ​​the rear function storage section V0 of the toilet body 4. This drain socket storage section 46 functions as a storage area that can store a drain socket S (see FIG. 1) connected to the outlet section 12e of the downcomer pipe 12c of the drain trap section 12.

[0028] 5 to 7, the rear functional storage section V0 is provided with a support wall section 48 that supports the flush water supply device 6 (functional section). This support wall section 48 is joined to the drain trap section 12, and divides the storage area of ​​the rear functional storage section V0 into upper and lower sections, namely an upper area V1 and a lower area V2. In addition, the upper area V1 of the rear functional storage section V0 includes a storage area for storing at least a part of the cleaning water supply device 6 (functional section), and the lower area V2 of the rear functional storage section V0 includes the opening areas of the connection opening 44 and the drain socket storage section 46.

[0029] 2 and 5 to 7, the support wall 48 of the rear function storage section V0 has upper horizontal walls 48b extending horizontally from a joint 48a with the drain trap section 12 to both the left and right sides and to the rear side. The support wall 48 also includes a lower horizontal wall 48c provided on the left and right outer side and below the upper horizontal wall 48b. The left and right outer sides of the lower horizontal wall 48c are joined to the inner wall 42d of the double wall E in the left and right side wall 42b of the skirt 42. Furthermore, the support wall portion 48 is provided with vertical wall portions 48d that extend downward from the left and right outer ends of the upper horizontal wall portion 48b to the left and right inner ends of the lower horizontal wall portion. In addition, the lower inner wall portion 52 of the double wall portion E of the side wall portion 42b of the skirt portion 42 is joined to the support wall portion 48 so as to extend toward the lower region from the joint C2 between the vertical wall portion 48d and the lower horizontal wall portion 48c of the support wall portion 48.

[0030] Next, as shown in FIG. 5, the inner wall portion 42d of the double wall portion E of the side wall portion 42b of the skirt portion 42 has upper inner wall portions 50 extending upward from outer joint portions C1 located on the left and right outer sides of the support wall portion 48. The inner wall portion 42d of the double wall portion E of the side wall portion 42b of the skirt portion 42 includes a lower inner wall portion 52 extending downward from an inner joint portion C2 located on the left and right inner side of the outer joint portion C1 of the support wall portion 48.

[0031] Furthermore, as shown in Figures 6 and 7, the lower inner wall portion 52 of the double wall portion E of the side wall portion 42b of the skirt portion 42 is joined to the support wall portion 48 so as to extend toward the lower region from the joint C2 between the vertical wall portion 48d and the lower horizontal wall portion 48c of the support wall portion 48. As shown in Figs. 5 to 7, a lower end 52a of the lower inner wall portion 52 in the double wall portion E of the side wall portion 42b of the skirt portion 42 is formed to extend to the installation surface (floor surface F) on which the toilet body 4 is installed.

[0032] Furthermore, as shown in FIG. 2, within the rear functional storage section V0, rearward of the joint 48a between the drain trap section 12 and the support wall section 48, there is provided a rear support area A1 in which the functional section (cleaning water supply device 6) is supported by the support wall section 48. As shown in FIGS. 5 and 6, in the rear support region A1, a first distance L1 in the horizontal left-right direction from the outer joint C1 to the inner joint C2 of the support wall portion 48 is set to be shorter than a second distance L2 in the horizontal left-right direction from the outer wall portion 42c of the double wall portion E in the side wall portion 42b of the skirt portion 42 to the inner joint C2 of the support wall portion 48 (L1 <L2)。 The second distance L2 is set to the maximum width dimension in the left-right direction of the internal space I of the double wall portion E of the side wall portion 42b of the skirt portion 42.

[0033] Next, as shown in FIG. 2, in the rear function storage section V0, a ​​front support area A2 is provided in front of the rear support area A1. Also, as shown in Figure 7, in the forward support area A2 of the rear functional storage section V0, the lower horizontal wall portion 48c of the support wall portion 48 is joined to the joint C3 where the upper inner wall portion 50 and the lower inner wall portion 52 of the double wall portion E in the side wall portion 42b of the skirt portion 42 are joined. Here, the area joined to the joint C3 is formed in at least a part of the front support area A2, and may be formed on only one of the left and right sides of the toilet body 4 as shown in FIG.

[0034] Next, the operation of the flush toilet 1 according to the embodiment of the present invention described above will be explained with reference to Figs. 1 to 7. First, according to the flushing toilet 1 according to an embodiment of the present invention, the first distance L1 in the horizontal left - right direction from the outer joint C1 to the inner joint C2 of the support wall portion 48 in the rear support region A1 of the rear functional storage portion V0 is shorter than the second distance L2 in the horizontal left - right direction from the outer wall portion 42c to the inner joint C2 of the support wall portion 48 in the double - wall portion E of the side wall portion 42b of the skirt portion 42 (L1 < L2), and this second distance L2 is set to the maximum width dimension in the left - right direction in the internal space I of the double - wall portion E of the side wall portion 42b of the skirt portion 42. Thereby, each of the upper inner wall portion 50 and the lower inner wall portion 52 in the double - wall portion E of the side wall portion 42b of the skirt portion 42 joined to the outer joint C1 and the inner joint C2 of the support wall portion 48 can surely hold the support wall portion 48 from the vertical direction. Therefore, the strength of the rear support region A1 of the rear functional storage portion V0 can be enhanced. In addition, since deformation such as distortion of the support wall portion 48 in the rear support region A1 of the rear functional storage portion V0 can be suppressed, the influence on the strength reduction and appearance of the rear functional storage portion V0 and the entire toilet body 4 can be suppressed. As a result, while suppressing the overall outer dimensions of the toilet body 4, a large storage region for the functional portion (washing water supply device 6) in the toilet body 4 can be secured, and the strength can be enhanced while ensuring the design and productivity of the entire toilet body 4.

[0035] Further, according to the flushing toilet 1 according to the present embodiment, the support wall portion 48 in the front support region A2 of the rear functional storage portion V0 is joined to the joint portion C3 where the upper inner wall portion 50 and the lower inner wall portion 52 in the double - wall portion of the side wall portion 42b of the skirt portion 42 are joined. Thereby, the support wall portion 48 in the front support region A2 of the rear functional storage portion V0 can be surely held from the vertical direction by each of the upper inner wall portion 50 and the lower inner wall portion 52 in the double - wall portion of the side wall portion 42b of the skirt portion 42. Therefore, the strength of the support wall portion 48 itself in the forward support area A2 of the rear functional storage portion V0 can be ensured, and the strength of the joint portion C3 between the support wall portion 48 and the upper inner wall portion 50 and the lower inner wall portion 52 in the double wall portion E of the side wall portion 42b of the skirt portion 42 can also be ensured. This makes it possible to suppress deformation such as distortion of the support wall 48 of the front support area A2 of the rear functional storage section V0, and suppresses deterioration in the strength of the rear functional storage section V0 and the entire toilet body 4 and the effects on the appearance.

[0036] Furthermore, according to the flush toilet 1 of this embodiment, the support wall portion 48 supporting the drain trap portion 12 is susceptible to deformation such as distortion in the surrounding area of ​​the joint 48a with the drain trap portion 12 due to the weight of the drain trap portion 12, but since the strength of the joints between the support wall portion 48 and the upper inner wall portion 50 and the lower inner wall portion 52 at the double wall portion E of the side wall portion 42b of the skirt portion 42 is increased in the rear support area A1 of the rear functional storage portion V0, the effects of deformation such as distortion of the support wall portion 48 in the surrounding area of ​​the joint 48a with the drain trap portion 12 can be suppressed. In addition, with regard to the support wall portion 48 in the rear support area A1 of the rear functional storage portion V0, which is located rearward of the joint 48a between the drain trap portion 12 and the support wall portion 48, its rear portion and left and right side portions are joined to the skirt portion 42 (rear wall portion 42a, side wall portion 42b) which is located rearward and left and right sides of the drain trap portion 12, so deformation such as distortion is suppressed. Therefore, the strength of the support wall portion 48 in the rear support area A1 of the rear functional storage portion V0 can be improved, thereby effectively suppressing the reduction in strength of the rear functional storage portion V0 and the entire toilet body 4 and the impact on the appearance.

[0037] Furthermore, in the flush toilet 1 of this embodiment, the support wall portion 48 of the rear functional storage portion V0 has a vertical wall portion 48d provided between the upper horizontal wall portion 48b and the lower horizontal wall portion 48c, so that the storage area within the rear functional storage portion V0 can be shaped with a step between the upper horizontal wall portion 48b and the lower horizontal wall portion 48c, thereby ensuring a larger storage area within the rear functional storage portion V0. In addition, in order to ensure a larger storage area within the rear functional storage section V0, even if there is a step, the lower inner wall portion 52 of the double wall portion E of the side wall portion 42b of the skirt portion 42 is joined to the support wall portion 48 so as to extend toward the lower area from the junction C2 between the vertical wall portion 48d and the lower horizontal wall portion 48c of the support wall portion 48. As a result, the strength of the support wall portion 48 of the rear functional storage portion V0 can be ensured by the lower inner wall portion 52 of the double wall portion E of the side wall portion 42b of the skirt portion 42. Therefore, it is possible to suppress a decrease in strength of the rear function storage section V0 and the entire toilet body 4, and an influence on the appearance.

[0038] Furthermore, according to the flush toilet 1 of this embodiment, the lower end portion 52a of the lower inner wall portion 52 in the double wall portion E of the side wall portion 42b of the skirt portion 42 is formed to extend to the installation surface (floor surface F) on which the toilet body 4 is installed, so that the lower inner wall portion 52 in the double wall portion E of the side wall portion 42b of the skirt portion 42 is stably supported by the installation surface (floor surface F). This allows the lower inner wall portion 52 of the double wall portion E of the side wall portion 42b of the skirt portion 42 to support the support wall portion 48 more stably, thereby ensuring the strength of the support wall portion 48 of the rear functional storage portion V0. Therefore, it is possible to suppress a decrease in strength of the rear function storage section V0 and the entire toilet body 4, and an influence on the appearance.

[0039] As a modified example of the flush toilet 1 according to one embodiment of the present invention, the support wall portion 48 in the rear support area A1 of the rear functional storage section V0 may be joined to a joint C3 where the upper inner wall portion 50 and the lower inner wall portion 52 in the double wall portion E of the side wall portion 42b of the skirt portion 42 are joined, and the support wall portion 48 in the front support area A2 may be joined to joints C1, C2 where the upper inner wall portion 50 and the lower inner wall portion 52 in the double wall portion E of the side wall portion 42b of the skirt portion 42 are joined. [Explanation of symbols]

[0040] 1. Flush toilet according to one embodiment of the present invention (hybrid flush toilet) 2 Main water supply channel 2a Rim side water supply channel 2b Jet side water supply line 2c Tank side water supply channel 2d Pump supply line 4. Toilet body 6 Cleaning water supply device (functional part) 8 Bowl section 10 Rim 12 Drain trap section 12a Inlet of drain trap 12b Drain trap riser 12c Downcomer pipe of drain trap 12d Top of drain trap 12e Outlet of drain trap 14 Rim Waterway 14a Rim Spout 16 Jet Waterway 16a Jet nozzle 18 Switching valve 20 Water Tank 22 Pressure pump 24 Stopcock 26 Branch fitting 26a Power failure changeover valve 28 Valve unit 30 Constant flow valve 32 Diaphragm type main valve 34 Solenoid valve 36 Controller 38 Upper float switch 40 Lower float switch 42 Skirt Club 42a Rear wall of skirt 42b Side wall of skirt 42c Outer wall of skirt 42d Inner wall of skirt 42e Bottom of skirt 42f Bottom recess of skirt 44 Connection opening 46 Drain socket storage area 48 Support wall section 48a Joint between support wall and drain trap 48b Upper horizontal wall of support wall 48c Lower horizontal wall of supporting wall 48d Vertical wall of supporting wall 50 Upper inner wall of double wall portion at side wall portion of skirt portion 52 Lower inner wall of double wall portion in side wall portion of skirt portion 52a: Lower end of the lower inner wall of the double wall portion of the side wall portion of the skirt portion A1 Rear support area of ​​rear functional storage A2 Front support area of ​​rear functional compartment B Branch C1 Outer joint C2 Inner joint of the support wall, joint between the vertical wall and the lower horizontal wall of the support wall C3: Joint where the upper inner wall portion and the lower inner wall portion of the double wall portion in the side wall portion of the skirt portion are joined D Drain pipe E Double wall section F Floor I Interior space L1: The first horizontal distance from the outer joint to the inner joint of the support wall L2 O1 drainage wick S Drain Socket T tank device (cleaning water supply device) V0 Rear functional storage area V1 Upper area of ​​rear function storage V2 Lower area of ​​rear function storage W0 Main water supply source

Claims

1. A flush toilet that is flushed with flush water to discharge waste, a ceramic toilet body having a bowl portion for receiving waste and a drain trap portion having an inlet portion connected to the bottom of the bowl portion for discharging waste within the bowl portion; a functional section provided behind the bowl section of the toilet body and having a function of controlling the discharge and stopping of flush water into the bowl section, The ceramic toilet body further includes a skirt portion formed outside the respective side surfaces of the bowl portion and the drain trap portion, and a rear function storage portion provided below the upper end of the skirt portion in an area rearward of the bowl portion and inside the skirt portion, and capable of storing at least a portion of the function portion, the rear functional storage section includes a support wall section that supports the functional section, the skirt portion forms a double wall portion having an outer wall portion forming an outer surface thereof and an inner wall portion provided inside the outer wall portion, and at least a portion of the double wall portion forms an internal space between the outer wall portion and the inner wall portion; the inner wall portion of the double wall portion of the skirt portion includes a lower inner wall portion extending downward from an outer joint portion located on the left and right outer side of the support wall portion or from an inner joint portion located on the left and right inner side of the outer joint portion of the support wall portion, A flush toilet characterized in that at least a portion of the lower end of the lower inner wall portion is formed to extend to the installation surface on which the toilet body is installed, thereby supporting the support wall portion.

2. The flush toilet according to claim 1, wherein the rear functional storage section has a front support area provided on the front side of the rear support area, and in this front support area, the support wall section is joined to a joint where the lower inner wall section of the double wall section of the skirt section is joined.

3. 3. The flush toilet according to claim 2, wherein the rear support area is located rearward of the joint between the drain trap portion and the support wall portion.

4. The support wall portion includes an upper horizontal wall portion joined to the drain trap portion, a vertical wall portion joined to the outer side of the upper horizontal wall portion and extending downward, and a lower horizontal wall portion provided below the upper horizontal wall portion and joined to the vertical wall portion, 4. A flush toilet according to any one of claims 1 to 3, wherein the lower inner wall portion of the double wall portion of the skirt portion is joined to the support wall portion so as to extend from the joint between the vertical wall portion and the lower horizontal wall portion of the support wall portion toward the inside of the lower region.

Images