Flush toilets and toilet equipment

JP2023091728A5Pending Publication Date: 2025-12-01LIXIL CORP
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Patent Information

Application Number
JP2022149000
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2022-09-20
Publication Date
2025-12-01

AI Technical Summary

Technical Problem

Conventional flush toilets made of ceramics are difficult to adapt to a floor drainage system where waste water is discharged to a drainage pipe on the rear wall surface.

Method used

A flush toilet bowl made of pottery with an integrally formed outer peripheral wall surrounding the toilet and trap portions, featuring an opening in the rear portion for a connecting pipe and accommodating a water supply hose and power cord, allowing compatibility with an above-floor drainage system.

Benefits of technology

The flush toilet achieves a well-designed appearance and structural integrity while enabling compatibility with above-floor drainage systems, reducing the need for multiple openings and enhancing the aesthetic and functional design.

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Abstract

To provide a well-designed flush toilet bowl that is compatible with above-floor drainage systems.SOLUTION: A flush toilet bowl 1 has a toilet bowl part 10, a trap part 20, and an outer peripheral wall part 40. The trap part 20 is connected to the lower end of the toilet bowl part 10. In a state where the flush toilet bowl 1 is installed, the outer peripheral wall part 40 is disposed on a floor so as to surround the toilet bowl part 10 and the trap part 20 all around in the four quarters. The flush toilet bowl 1 is ceramic formed integrally from the toilet bowl part 10, the trap part 20 and the outer peripheral wall part 40. The outer peripheral wall part 40 has an opening 40A formed at the rear for passing a connection pipe P connected to a lower end of a second down-flow channel 23, which is a downstream end of the trap part 20.SELECTED DRAWING: Figure 5
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Description

[Technical Field]

[0001] The present disclosure relates to flush toilets. [Background technology]

[0002] Patent Document 1 discloses a conventional flush toilet. This flush toilet is made of ceramic. This flush toilet is equipped with a toilet bowl, a trap connected to the bottom end of the toilet bowl, and an outer wall that completely surrounds the toilet bowl and trap. This flush toilet has an excellent aesthetic appearance, as the toilet bowl, trap, and outer wall are integrally formed from ceramic. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-114633 Summary of the Invention [Problem to be solved by the invention]

[0004] The flush toilet in Patent Document 1 is intended for use as a so-called underfloor drainage system, in which wastewater that passes through the trap is discharged into a drain pipe on the floor. There are also flush toilet drainage systems, in which water is discharged into a drain pipe on the rear wall, known as an above-floor drainage system. It is difficult for the flush toilet in Patent Document 1 to be used with this above-floor drainage system.

[0005] The present disclosure has been made in consideration of the above-mentioned conventional situation, and has as its object to solve the problem of providing a flush toilet with good design that is compatible with the above-floor drainage system. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, a flush toilet according to one embodiment of the present disclosure is a ceramic flush toilet that is integrally formed with a toilet bowl, a trap connected to the lower end of the toilet bowl, and an outer wall that is positioned on the floor and surrounds the toilet bowl and trap all around from front to back and left to right when installed, and has an opening formed at the rear of the outer wall for passing a connecting pipe that is connected to the downstream end of the trap. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a side view showing a toilet apparatus equipped with a flush toilet according to a first embodiment. [Figure 2] 1 is a rear view showing a toilet apparatus equipped with a flush toilet according to Embodiment 1. FIG. [Figure 3] FIG. 1 is a plan view showing a flush toilet according to a first embodiment. [Figure 4] FIG. 1 is a rear view showing a flush toilet according to the first embodiment. [Figure 5] FIG. 4 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. 3. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of the flush toilet of the present disclosure will be described with reference to the drawings. In the following description, the front-to-back, left-to-right, and up-to-down directions of the flush toilet refer to those seen from a user using the flush toilet in a seated position. The X-axis, Y-axis, and Z-axis shown in each figure represent the front-to-back, left-to-right, and up-to-down directions, respectively. The positive directions of the X-axis, Y-axis, and Z-axis are the front, left, and up directions, respectively.

[0009] <Embodiment 1> The flush toilet 1 according to the first embodiment is provided in a toilet apparatus T shown in Figures 1 and 2. The toilet apparatus T is used as an above-floor drainage toilet apparatus that drains water into a drain pipe (not shown) on the rear wall. The toilet apparatus T comprises a flush toilet 1, a toilet seat apparatus 2, a toilet flushing apparatus 3, a connecting pipe P, a water supply hose H, and a power cord C. The toilet seat apparatus 2 comprises a toilet seat 2A, a toilet lid 2B, a functional part 2C, etc., and is positioned above the flush toilet 1.

[0010] The toilet flushing device 3 has various functional parts, such as a tank that stores flush water and a pump that pressure-feeds the flush water in this tank. As shown in Figures 1 and 2, the toilet flushing device 3 is placed in the internal space of the flush toilet 1. Specifically, the toilet flushing device 3 is placed in the internal space of the flush toilet 1, in the upper space S1 (described below). A portion of the toilet flushing device 3 is located above the top end of the flush toilet 1, and is covered by the functional part 2C of the toilet seat device 2. A connecting pipe P connects the trap part 20 of the flush toilet 1 to a drain pipe (not shown) on the rear wall. A water supply hose H and a power cord C supply water and power to the toilet seat device 2 and the toilet flushing device 3 from outside.

[0011] As shown in Figures 3 to 7, the flush toilet 1 comprises a toilet bowl 10, a trap 20, an upper surface 30, an outer peripheral wall 40, a support wall 60, and a support 70. The flush toilet 1 is made of ceramic, with the toilet bowl 10, trap 20, upper surface 30, outer peripheral wall 40, and support wall 60 formed as a single unit. The toilet bowl 10 is bowl-shaped with an oval opening at the top. The trap 20 is connected to the bottom of the toilet bowl 10. The upper surface 30 extends laterally from the upper edge of the toilet bowl 10. The outer peripheral wall 40 surrounds the toilet bowl 10 and trap 20 all the way around. When the flush toilet 1 is installed, the outer peripheral wall 40 is placed on the floor, which serves as the installation surface. The support wall 60 connects the trap 20 and outer peripheral wall 40 to support the trap 20.

[0012] As shown in FIG. 5, the trap section 20 has a first descending flow path 21, an ascending flow path 22, and a second descending flow path 23. The first descending flow path 21 is continuous with the lower part of the toilet bowl section 10 and slopes diagonally downward toward the rear. The ascending flow path 22 is continuous with the first descending flow path 21 and slopes diagonally upward toward the rear. The boundary between the first descending flow path 21 and the ascending flow path 22 is gently curved, and is formed by a flow path that changes continuously. The boundary between the first descending flow path 21 and the ascending flow path 22 corresponds to the lower end 20A of the entire trap section 20.

[0013] As shown in Figure 5, the second descending flow path 23 is continuous with the ascending flow path 22 and extends in a substantially vertical direction. The boundary between the ascending flow path 22 and the second descending flow path 23 is curved more abruptly than the boundary between the first descending flow path 21 and the ascending flow path 22, and is formed as a continuously changing flow path. The lower end of the second descending flow path 23 opens vertically downward. A connecting pipe P is connected to the lower end of the second descending flow path 23. The lower end of the second descending flow path 23 is located above the lower end 20A of the trap section 20.

[0014] As shown in Figures 3 and 5, the upper surface portion 30 has an opening 31. The opening 31 is formed such that the portion located above the toilet bowl 10 is open in the vertical direction. The opening 31 is elliptical in shape to fit the shape of the upper peripheral edge of the toilet bowl 10. The outer edge of the upper surface portion 30 is rectangular in shape with the longitudinal direction extending in the front-to-rear direction. The rear end 30A of the upper surface portion 30 extends linearly in the left-to-right direction. A protrusion 32 is provided at the rear end 30A of the upper surface portion 30. The protrusion 32 protrudes rearward from the rear end 30A of the upper surface portion 30.

[0015] As shown in Figures 3 to 7, the outer peripheral wall 40 has a front wall 41, left and right wall portions 42L, 42R, and a rear wall portion 43. The outer peripheral wall 40 surrounds the toilet bowl 10 and the trap portion 20. The front wall 41 and the left and right wall portions 42L, 42R extend continuously downward, with the front end and the left and right outer edges of the upper surface portion 30 as their upper ends. The rear portions of the left and right wall portions 42L, 42R extend rearward beyond the rear end 30A of the upper surface portion 30. The rear wall portion 43 extends opposite the rear end 30A of the upper surface portion 30 in a plan view. When the flush toilet 1 is installed, the lower end surface of the outer peripheral wall 40 rests on the floor, which serves as the installation surface.

[0016] As shown in Figures 5 and 6, the front wall 41 gradually curves inward from top to bottom. As shown in Figures 4 and 5, the left and right wall portions 42L, 42R and the rear wall portion 43 are inclined slightly inward from top to bottom. The outer peripheral wall portion 40 has a smooth, flowing design in which the outer peripheral surfaces of the front wall portion 41, the left and right wall portions 42L, 42R and the rear wall portion 43 are formed with a series of curved surfaces all around the circumference. The lower end of the outer peripheral wall portion 40 forms a stepped shape recessed inward all around the circumference.

[0017] 7, the outer peripheral wall 40 has a reinforcing wall 44. The reinforcing wall 44 is provided inside a portion of the left and right wall 42L, 42R that is rearward of the rear end 30A of the upper surface 30. By providing the reinforcing wall 44, a double-structure portion is formed in the portion of the outer peripheral wall 40 that is rearward of the upper surface 30.

[0018] As shown in Figures 4 and 5, the outer peripheral wall 40 forms an opening 40A. The opening 40A is an opening for passing a connecting pipe P in the toilet apparatus T. In other words, the opening 40A corresponds to the first opening according to the present disclosure. The opening 40A is formed by penetrating the rear wall 43 of the outer peripheral wall 40. When viewed from the back of the flush toilet 1, the opening 40A is formed in the left-right center of the rear wall 43. The opening 40A is U-shaped with the lower end open downward. In the case of this embodiment, a water supply hose H and a power cord C are also passed through the opening 40A. In other words, the opening 40A also corresponds to the second opening according to the present disclosure.

[0019] As shown in FIGS. 5 and 6, the flush toilet 1 has a first inner wall portion 51 and a second inner wall portion 52. The first inner wall portion 51 is provided contiguous with the inside of the front wall portion 41 and the inside of the left and right wall portions 42L, 42R. The first inner wall portion 51 rises upward from the lower ends of the front wall portion 41 and the left and right wall portions 42L, 42R. The upper end of the first inner wall portion 51 is connected to the underside of the toilet bowl 10. The first inner wall portion 51 extends rearward from the front wall portion 41 to the left and right wall portions 42L, 42R along the inner surface of the outer peripheral wall portion 40. As shown in FIGS. 5 and 6, the second inner wall portion 52 extends downward from the rear of the upper surface portion 30 at the rear of the toilet bowl 10.

[0020] As shown in Figures 5 to 7, the flush toilet 1 forms an upper space S1 and a lower space S2. The upper space S1 opens upward behind the upper surface 30. The upper space S1 is surrounded by the left and right wall portions 42L, 42R, the rear wall portion 43, and the second inner wall portion 52 (see Figure 6), and is formed above the support wall portion 60. The lower space S2 is a space surrounded by the first inner wall portion 51, the left and right wall portions 42L, 42R, and the rear wall portion 43, and is the space below the support wall portion 60. The lower space S2 opens downward.

[0021] The support wall portion 60 supports the trap portion 20. As shown in FIGS. 3 to 7, the support wall portion 60 extends from a connection portion J with the trap portion 20 and connects to the inner surface of the outer peripheral wall portion 40. The front end of the support wall portion 60 is connected to the lower end of the second inner wall portion 52. As shown in FIGS. 4 and 7, the support wall portion 60, when viewed from the front-rear direction, extends downward from the center in the left-right direction toward the left and right outward directions, bending in a crank-like cross section. As a result, the upper space portion S1 forms spaces at the left and right ends that are recessed downward relative to the center portion. In contrast, the lower space portion S2 has a shape in which the center portion protrudes upward relative to the left and right ends in a convex shape. In the left and right recessed spaces of the upper space portion S1, as shown in FIG. 2, tanks of flush water for the toilet flushing device 3 are disposed and extend from above. In other words, the toilet flushing device 3 in the toilet device T is disposed so as to overlap in the left-right direction with the support wall portion 60 and the trap portion 20. In the convex space in the left-right center of the lower space portion S2, the second descending flow path 23 in the trap portion 20 and the connecting pipe P connected to the lower end of this second descending flow path 23 are disposed, as shown in Figure 2.

[0022] The support wall portion 60 has a bilaterally symmetrical shape. Specifically, as shown in FIGS. 3 to 7, the support wall portion 60 has an upper support wall portion 61, left and right vertical support wall portions 62L, 62R, and left and right lower support wall portions 63L, 63R. The upper support wall portion 61 forms the connection portion J with the trap portion 20. As shown in FIGS. 3 to 5, the upper support wall portion 61 has a flat plate shape extending in the front-rear direction. The upper support wall portion 61 extends horizontally from the outer peripheral surface of the second descending flow path 23 of the trap portion 20 at a vertically intermediate portion. The front end of the upper support wall portion 61 is connected to the second inner wall portion 52. The rear end of the upper support wall portion 61 is connected to the rear wall portion 43. As shown in FIG. 5, the lower surface of the upper support wall portion 61 is at the same height as the upper edge of the opening 40A. That is, the upper edge of the opening 40A according to the present embodiment is continuous with the upper support wall portion 61. As shown in Fig. 3, the left and right ends of the upper support wall portion 61 extend linearly in the front-rear direction at intervals from the left and right reinforcing wall portions 44.

[0023] The left and right vertical support wall portions 62L, 62R extend downward from the left and right ends of the upper support wall portion 61. As shown in FIGS. 5 and 6, the rear ends of the left and right vertical support wall portions 62L, 62R are connected to the rear wall portion 43. The front ends of the left and right vertical support wall portions 62L, 62R are connected to the second inner wall portion 52. The lower ends of the left and right vertical support wall portions 62L, 62R extend downward below the lower end of the second descending flow path 23 in the trap portion 20. The lower ends of the left and right vertical support wall portions 62L, 62R extend downward below the lower end 20A of the trap portion 20. The lower ends of the left and right vertical support wall portions 62L, 62R extend in the front-to-rear direction above the lower end of the outer peripheral wall portion 40. As shown in FIG. 7, the left and right vertical support wall portions 62L, 62R are slightly inclined outward as they extend downward. The left and right vertical support walls 62L, 62R extend downward along the edges of the opening 40A. That is, the opening 40A according to this embodiment is continuous with the left and right vertical support walls 62L, 62R at the left and right edges.

[0024] 7, the left and right lower support wall portions 63L, 63R extend horizontally outward in the left-right direction from the lower ends of the left and right vertical support wall portions 62L, 62R. The front ends of the left and right lower support wall portions 63L, 63R are connected to the second inner wall portion 52. The rear ends of the left and right lower support wall portions 63L, 63R are connected to the rear wall portion 43. The left and right ends of the left and right lower support wall portions 63L, 63R are connected to the reinforcing wall portion 44.

[0025] As shown in Figures 3, 5, and 6, the support wall portion 60 has a plurality of through holes 60A, 60B, and 60C. Each of the through holes 60A, 60B, and 60C connects the upper space S1 and the lower space S2 partitioned by the support wall portion 60. Of the plurality of through holes 60A, 60B, and 60C, the through hole 60A is formed in the upper support wall portion 61, and the through holes 60B and 60C are formed in each of the left and right vertical support wall portions 62L and 62R. In this embodiment, of the plurality of through holes 60A, 60B, and 60C, a water supply hose H and a power cord C are passed through the through hole 60A, which are led from the opening 40A into the lower space S2 inside the outer peripheral wall portion 40.

[0026] As shown in FIG. 3, the through-hole 60A is formed at a position overlapping with the opening 40A in the front-rear direction in a plan view. The through-hole 60A is formed at a position overlapping with the trap section 20 in the front-rear direction in a plan view. The front end edge of the through-hole 60A is continuous with the outer peripheral surface of the trap section 20. The through-holes 60B and 60C are formed at positions overlapping with the trap section 20 in the left-right direction in a plan view. The through-holes 60B and 60C are formed below the lower end of the second descending flow path 23 in the trap section 20. The through-holes 60B and 60C are formed below the lower end 20A of the trap section 20.

[0027] 1 and 2, the support part 70 is disposed in the opening 40A. The support part 70 supports the water supply hose H and the power cord C that are passed through the opening 40A. The support part 70 is formed in a plate shape that closes the opening 40A. The support part 70 forms a through hole 70A through which the connection pipe P passes.

[0028] The action and effect of the flush toilet 1 according to this embodiment will be explained. The flush toilet 1 comprises a toilet bowl 10, a trap 20, and an outer peripheral wall 40. The trap 20 is connected to the lower end of the toilet bowl 10. When the flush toilet 1 is installed, the outer peripheral wall 40 is placed on the floor, surrounding the toilet bowl 10 and trap 20 all the way around, front to back and left to right. The flush toilet 1 is made of ceramic, with the toilet bowl 10, trap 20, and outer peripheral wall 40 formed as a single unit. An opening 40A is formed at the rear of the outer peripheral wall 40, for passing through the connecting pipe P, which is connected to the lower end of the second downward flow path 23, which is the downstream end of the trap 20.

[0029] The flush toilet 1 is given a good design by the outer peripheral wall 40 that completely surrounds the toilet bowl 10 and trap 20. The flush toilet 1 has an opening 40A formed at the rear of this outer peripheral wall 40 for passing the connecting pipe P through. Therefore, the flush toilet 1 can be realized as a flush toilet with a good design that is compatible with above-floor drainage systems.

[0030] The outer peripheral wall 40 has a second opening, opening 40A, formed at the rear. Opening 40A is provided for pulling the water supply hose H and power cord C inside the outer peripheral wall 40. As a result, the flush toilet 1 allows the water supply hose H and power cord C to be easily routed, and achieves a neat and sleek exterior design.

[0031] Opening 40A functions as both the first opening and second opening according to the present disclosure. As a result, the flush toilet 1 can reduce the number of openings formed compared to when separate openings for connecting pipes and other openings for water supply hoses, power cords, etc. are provided, and this helps prevent a loss of aesthetic appeal to the outer peripheral wall.

[0032] The flush toilet 1 is equipped with a support wall portion 60. The support wall portion 60 connects the trap portion 20 and the outer peripheral wall portion 40, and supports the trap portion 20. As a result, the flush toilet 1 can ensure the strength of the trap portion 20. By being equipped with the support wall portion 60, the flush toilet 1 can also ensure the strength of the outer peripheral wall portion 40.

[0033] Opening 40A is continuous with the support wall portion 60. As a result, the flush toilet 1 can ensure the strength of the peripheral edge of opening 40A in the outer peripheral wall portion 40. For example, if an opening formed in the outer peripheral wall portion is not continuous with the support wall portion, the strength of the peripheral edge of the opening will depend solely on the strength of the outer peripheral wall portion. In contrast, in the case of this embodiment, the strength of the peripheral edge of opening 40A depends on the outer peripheral wall portion 40 and the support wall portion 60, making it possible to further improve strength.

[0034] The height of the upper edge of opening 40A is the same as the lower surface of upper support wall portion 61 of support wall portion 60. In other words, the height of the upper edge of opening 40A is ensured to be within 50 mm below the lower edge of upper support wall portion 61 of support wall portion 60. As a result, flush toilet 1 ensures that opening 40A is sufficiently large, and because opening 40A is formed at an appropriate height that is not too low, connecting pipe P can be easily passed through.

[0035] The flush toilet 1 is equipped with a support part 70. The support part 70 is provided inside the opening 40A. The support part 70 supports the water supply hose H and the power cord C. As a result, the flush toilet 1 can effectively regulate the routing paths of the water supply hose H and the power cord C.

[0036] The support wall portion 60 forms a through-hole 60A. A water supply hose H and a power cord C are passed through the through-hole 60A. When installed in a plan view, the through-hole 60A and the opening 40A overlap in the front-to-back direction. For this reason, the flush toilet 1 allows the water supply hose H and power cord C, which are led into the interior through the opening 40A, to be passed through the through-hole 60A without difficulty.

[0037] The water supply hose H and power cord C that pass through the opening 40A are each passed below the connecting pipe P. This allows the flush toilet 1 to effectively utilize the space below the connecting pipe P in the opening 40A. For example, the height of the drain pipe on the rear wall is specified to a certain extent, such as 155 mm. As a result, the height position of the connecting pipe P is also determined according to these specifications, making it difficult to position the connecting pipe P lower. In this embodiment, by passing the water supply hose H and power cord C through the space below the connecting pipe P in the opening 40A, the space within the opening 40A can be effectively utilized.

[0038] <Other embodiments> The present disclosure is not limited to the embodiments described above and illustrated in the drawings, and the following embodiments, for example, are also included within the technical scope of the present disclosure.

[0039] The positions of the first and second openings in the outer peripheral wall are not limited to those described in the above embodiment. That is, the first opening does not necessarily have to be formed in the center of the rear of the outer peripheral wall. The first opening may be formed, for example, at a position closer to the left or right side of the rear of the outer peripheral wall.

[0040] It is not essential that the outer wall portion form a second opening. If a second opening is not formed, the water supply hose and the power cord may be led into the outer wall portion from at least one of the upper and lower sides of the outer wall portion. If a second opening is formed, the second opening may be formed as the same opening as the first opening, as in the above embodiment, or may be formed as an opening separate from the first opening.

[0041] The shapes of the first and second openings are not limited to those in the above embodiment. At least one of the first and second openings may not be open to the lower end of the outer peripheral wall portion, for example. That is, at least one of the first and second openings may be formed above the lower end of the outer peripheral wall portion.

[0042] A flush toilet may have a third opening formed to allow items other than connecting pipes, water supply hoses, and power cords, such as ventilation pipes, signal lines, and operating wires, to be pulled into the outer peripheral wall. In this case, the third opening may be the same opening as the first opening, or the same opening as the second opening.

[0043] It is not essential for a flush toilet to have a support wall portion. If a support wall portion is provided, its shape, etc., is not limited to that of the above embodiment. The support wall portion may, for example, extend horizontally from the connection portion with the trap portion at the left and right sides of the trap portion and be connected to the outer peripheral wall portion. The support wall portion may, for example, be in the form of a flat plate that extends horizontally from the connection portion with the trap portion all around the circumference and is connected to the outer peripheral wall portion. At least a portion of the support wall portion may, for example, be connected to the outer peripheral wall portion above the connection portion with the trap portion. The support wall portion may, for example, be connected to the outer peripheral wall portion at a portion rearward of the trap portion and extend downward from the connection portion with the trap portion.

[0044] If the flush toilet has a support wall, the first opening does not have to be continuous with the support wall. In this case, the first opening may be formed away from the support wall, for example, as long as the strength of the outer peripheral wall at the edge of the first opening is ensured. The upper edge of the first opening may be located, for example, more than 50 mm below the lower edge of the support wall.

[0045] In the present disclosure, the term "a configuration in which the first opening is continuous with the support wall portion" is intended to include not only a configuration in which the upper edge of the first opening and the lower surface of the support wall portion are flush with each other, but also a configuration in which there is only a slight difference in height between the upper edge of the first opening and the lower surface of the support wall portion (for example, a difference equal to or less than the thickness of the outer wall portion), as in the above embodiment.

[0046] If the flush toilet is equipped with a support wall portion, it is not necessary to form a through-hole in the support wall portion. If a through-hole is formed in the support wall portion, the number, shape, and position of the through-holes are not limited to those in the above embodiment. For example, the through-hole may be formed behind the trap portion, overlapping with the trap portion in the front-to-rear direction in a plan view, and may be formed below at least one of the lower end of the second downward flow path in the trap portion and the lower end of the entire trap portion.

[0047] It is not essential for a flush toilet to have a support part. If a flush toilet has a support part, the support part may support things other than the water supply hose and power cord, such as ventilation pipes, signal lines, and operating wires.

[0048] It is not essential that the outer peripheral wall portion has a reinforcing wall portion. In other words, it is not essential that the outer peripheral wall portion has a double structure portion. When the outer peripheral wall portion has a reinforcing wall portion, the reinforcing wall portion may be formed only on a portion of the outer peripheral wall portion in the circumferential direction as in the above embodiment, or may be formed on the entire circumferential circumference of the outer peripheral wall portion in the circumferential direction. For example, the outer peripheral wall portion may be formed with only a single structure over the entire circumferential circumference.

[0049] A flush toilet according to the present disclosure may be used in a configuration in which at least a portion of the toilet flushing device is disposed in a lower space portion, which is the space below the support wall portion.

[0050] The flush toilet according to the present disclosure may be used in an underfloor drainage system. [Explanation of symbols]

[0051] 1... flush toilet, 10... toilet bowl, 20... trap, 40... outer wall, 40A... opening (first opening, second opening), 43... rear wall, 60... support wall (61... upper support wall, 62L, 62R... vertical support wall, 63L, 63R... lower support wall), 60A, 60B, 60C... through hole, 70... support, C... power cord, H... water supply hose, P... connecting pipe

Claims

1. A toilet bowl portion, an outer peripheral wall portion that surrounds the toilet bowl from all sides in an installed state and is placed on the floor; A ceramic flush toilet integrally formed with The flush toilet has an opening formed in the rear of the outer peripheral wall for passing an operating wire through.

2. A trap portion is provided that is connected to the lower end of the toilet bowl portion, the opening is a first opening, 2. The flush toilet according to claim 1, wherein the outer peripheral wall portion has a second opening formed in its rear portion for passing a connecting pipe connected to the downstream end of the trap portion.

3. 3. The flush toilet of claim 2, wherein the first opening and the second opening are the same.

4. a support wall portion that connects the trap portion and the outer peripheral wall portion and supports the trap portion, The flush toilet according to claim 2 or claim 3, wherein the first opening is formed below the support wall portion.

5. the opening is a first opening, 5. The flush toilet according to claim 1, wherein the outer peripheral wall portion has a third opening formed in the rear portion, through which at least one of a water supply hose and a power cord is passed.

6. The flush toilet according to claim 5, wherein the third opening is a separate opening from the first opening.

7. A trap portion is provided that is connected to the lower end of the toilet bowl portion, the outer peripheral wall portion has a second opening formed at a rear portion thereof for passing a connecting pipe connected to a downstream end of the trap portion; 7. The flush toilet according to claim 5 or claim 6, wherein the third opening is a separate opening from the second opening.

8. A flush toilet according to any one of claims 1 to 7, a connecting pipe that is passed through the opening and connected to the downstream end of the trap section; A toilet device comprising: