Water-washable toilet

Abstract

To provide a flush toilet for wall drainage that ensures sufficient water depth in the water reservoir while keeping the distance from the top surface of the toilet bowl to the water reservoir shallow. [Solution] The toilet bowl body 10 comprises a toilet bowl portion 20, a trap portion 30 provided downstream of the toilet bowl portion 20, and a drainage connection portion 50 provided downstream of the trap portion 30 and connected to a drain pipe in the wall, wherein the lower end 35 of the outer shape of the trap portion 30 is located below the lower end 53 of the outer shape of the drainage connection portion 50, and the water level 71 in the toilet bowl portion 20 is located above the center 51C of the opening 51 at the downstream end of the drainage connection portion 50.

Description

Technical Field

[0001] The present disclosure relates to a flush toilet.

Background Art

[0002] For example, as described in Patent Document 1 below, a flush toilet for wall drainage corresponding to a drain pipe in a wall is known. The flush toilet for wall drainage includes a toilet bowl part, a trap part provided on the downstream side of the toilet bowl part, and a drainage connection part connected to a drain pipe in the wall. The lower end part of the toilet bowl part and the trap part constitute a water storage part for storing water. The water stored in the water storage part prevents the movement of odors from the drain pipe side to the toilet bowl side.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Dirt easily adheres to the portion of the bowl surface of the toilet bowl part up to the water storage surface. In the flush toilet as described above, there has been a demand to make the depth from the upper surface of the toilet bowl part to the water storage surface shallower while ensuring a sufficient depth of the water in the water storage part.

[0005] The present disclosure has been completed based on the above circumstances, and an object thereof is to provide a flush toilet for wall drainage that can make the depth from the upper surface of the toilet bowl part to the water storage surface shallower while ensuring a sufficient depth of the water in the water storage part.

Means for Solving the Problems

[0006] The flush toilet according to the present disclosure comprises a toilet bowl, a trap provided downstream of the toilet bowl, and a drainage connection provided downstream of the trap and connected to a drain pipe in the wall, wherein the lower end of the outer shape of the trap is located below the lower end of the outer shape of the drainage connection, and the water level in the toilet bowl is located above the center of the opening at the downstream end of the drainage connection. [Brief explanation of the drawing]

[0007] [Figure 1] Cross-sectional view of a flush toilet [Figure 2] A cross-sectional view showing a flush toilet, corresponding to the cross-section at position AA in Figure 1. [Figure 3] Bottom view of a flush toilet [Modes for carrying out the invention]

[0008] <Embodiment> The flush toilet T is a floor-standing toilet. The toilet body 10 of the flush toilet T is made of ceramic and, as shown in Figure 1, has a toilet bowl 20, a trap 30, a connecting section 40, a drain connection section 50, a water supply section 60, and a peripheral wall section 80. The trap 30 is located downstream of the toilet bowl 20. The connecting section 40 is located downstream of the trap 30. The drain connection section 50 is located downstream of the connecting section 40. The flush toilet T is for wall drainage, and the drain connection section 50 is connected to a wall drain pipe (not shown). The height of the wall drain pipe from the floor to the drain center is 170 mm. The water supply section 60 is located upstream of the toilet bowl 20. The peripheral wall section 80 surrounds the toilet bowl 20 and the trap 30. The T-type flush toilet is a wash-down toilet that uses the water flow action caused by the difference in water pressure to wash away waste.

[0009] In the following explanation of each component, the upper side of the flush toilet T when placed on the floor will be referred to as the upper side, the lower side as the lower side, the side with the drain connection part 50 provided as the rear side, the side with the toilet bowl part 20 provided as the front side, and the right side and left side as the left side, relative to a person sitting on the toilet body 10 facing forward. In the drawing, the positive direction of the X axis is the front side, the negative direction of the X axis is the rear side, the positive direction of the Y axis is the upper side, the negative direction of the Y axis is the lower side, the positive direction of the Z axis is the right side, and the negative direction of the Z axis is the left side.

[0010] A toilet flushing tank (not shown) is attached to the rear upper surface of the toilet bowl body 10. The water from the toilet flushing tank flows into a water supply space 61 formed inside the water supply unit 60.

[0011] The toilet bowl section 20 has a rim section 21, a bowl section 22, and a recess 23. The rim section 21 is provided around almost the entire circumference of the upper end of the toilet bowl section 20. The rim section 21 has an upright shape in the vertical direction. A water outlet 24 is opened in the rim section 21. The water outlet 24 is formed at the rear of the rim section 21. The water outlet 24 opens the water supply space 61 forward and discharges washing water from the water supply space 61 into the toilet bowl section 20.

[0012] The bowl portion 22 is connected to the lower part of the rim portion 21. The bowl portion 22 has a gradual slope downward from the lower end of the rim portion 21 toward the recess 23.

[0013] The recessed portion 23 is located below the bowl portion 22 and has a downward-sloping shape. The washing water flows down from the rim portion 21 along the bowl portion 22 in a swirling motion and into the recessed portion 23.

[0014] A water reservoir surface 71 is formed above the bottom wall 25 of the recess 23. The water reservoir surface 71 is formed at the same height as the wear 32 of the trap section 30. The recess 23 and the portion of the trap section 30 below the water reservoir surface 71 constitute the water reservoir section 70.

[0015] An outlet 26 is formed in the bottom wall 25 of the recess 23. The bottom wall 25 is approximately horizontal. The height of the bottom wall 25 is located above the vertical center of the toilet bowl body 10.

[0016] The outlet 26 is connected to the drainage channel 13. The drainage channel 13 is formed inside the trap section 30 and the connecting section 40. The drainage channel 13 extends diagonally downward from the outlet 26, passes through the dip 31 and wear 32 of the trap section 30, then extends downward inside the connecting section 40 to reach the inside of the drainage connection section 50.

[0017] The drainage channel 13 is divided into three sections: the first descending channel 14 from the outlet 26 to the YZ plane including the dip 31; the ascending channel 15 from the YZ plane including the dip 31 to the YZ plane including the wear 32; and the second descending channel 16 from the YZ plane including the wear 32 to the upstream end of the drainage connection 50. The first descending channel 14 slopes diagonally backward from the outlet 26. The ascending channel 15 slopes diagonally backward from the downstream end of the first descending channel 14. The second descending channel 16 slopes diagonally backward from the downstream end of the ascending channel 15.

[0018] The outlet 26 is the entrance to the trap section 30. The centerline 30L of the trap section 30 extends downstream from the center P1 of the outlet 26. The YZ plane containing the dip 31 passes through the lower end 35 of the outer shape of the trap section 30. The intersection of the vertical plane perpendicular to the centerline 30L of the trap section 30, passing through the lower end 35 of the outer shape of the trap section 30, and the centerline 30C of the trap section 30 is called the lowest point P2. The YZ plane containing the wear 32 is a vertical plane perpendicular to the centerline 30L of the trap section 30. The intersection of the YZ plane containing the wear 32 and the centerline 30C of the trap section 30 is called the highest point P3.

[0019] The trap section 30 is tubular in shape and extends along the center line 30L. The trap section 30 has a descending section 33 that forms a first descending channel 14 inside, and an ascending section 34 that forms an ascending channel 15 inside. The wear 32 of the trap section 30 is located above the bottom wall 25 of the recess 23.

[0020] The length dimension 15L of the upward flow path 15 is larger than the length dimension 16L of the second downward flow path 16. The length dimension 15L of the upward flow path 15 is the dimension along the center line 30L of the trap portion 30. The length dimension 16L of the second downward flow path 16 is the dimension along approximately the center of the communication portion 40 on the XY plane at the center in the left - right direction of the toilet body 10.

[0021] As shown in FIG. 2, the communication portion 40 has left and right side walls 42 and a ceiling wall 43. A communication space 41 is formed inside the communication portion 40. The communication space 41 is located directly below the water supply space 61. The left - right dimension 41L in the YZ plane of the communication space 41 is smaller than the left - right dimension 61L in the YZ plane of the water supply space 61. The second downward flow path 16 is formed in the communication space 41.

[0022] As shown in FIG. 1, the drain connection portion 50 is cylindrical and extends along the center line 50L. The inner diameter dimension of the drain connection portion 50 is constant around the center line 50L. The center line 50L of the drain connection portion 50 extends downward and obliquely from the upstream side to the downstream side. The inclination angle of the center line 50L of the drain connection portion 50 is about 10 degrees with respect to the horizontal plane (XZ plane). The drain connection portion 50 protrudes obliquely downward and rearward from the rear surface 17 of the toilet body 10. The rear end 52 of the outer shape of the drain connection portion 50 is located on the front side of the rear end 18 at the lower end 12 of the toilet body 10. The lower end 12 of the toilet body 10 is the lower end of the toilet body 10. The upper end 55 of the outer shape of the downstream end opening 51 of the drain connection portion 50 coincides with the rear end 52 of the outer shape of the drain connection portion 50. The upper end 55 of the outer shape of the downstream end opening 51 is located above the dip 31. The upper end 55 of the outer shape of the downstream end opening 51 is located at the same height as the ware 32.

[0023] The lower end 12 of the toilet body 10 is the lower end of the peripheral wall portion 80 and is installed on the floor surface. When looking at the lower end 12 of the toilet body 10 from below, as shown in FIG. 3, it is annular and long in the front - rear direction. The front portion of the lower end 12 of the toilet body 10 is arc - shaped, and the rear portion is linear. The front - rear dimension 10D of the lower end 12 of the toilet body 10 is larger than the front - rear dimension 10U of the upper end 11 of the toilet body 10 (see FIG. 1).

[0024] As shown in FIG. 1, the lower end 35 of the outer shape of the trap part 30 is located below the lower end 53 of the outer shape of the drain connection part 50. The water storage surface 71 is located above the center 51C of the downstream end opening 51 of the drain connection part 50. The height dimension H1 from the upper end 11 of the toilet body 10 to the water storage surface 71 is smaller than the height dimension H2 from the water storage surface 71 to the lower end 12 of the toilet body 10.

[0025] As shown in FIG. 2, the left - right dimension 41L of the communication space 41 on the vertical plane (YZ plane) is larger than the inner diameter dimension 54 of the drain connection part 50 on the plane intersecting the center line 50L of the drain connection part 50.

[0026] According to the embodiment configured as described above, the following effects are achieved. The flushing toilet T includes a toilet body 10 having a toilet bowl part 20, a trap part 30, and a drain connection part 50. The trap part 30 is provided on the downstream side of the toilet bowl part 20. The drain connection part 50 is provided on the downstream side of the trap part 30 and is connected to the drain pipe in the wall. The lower end 35 of the outer shape of the trap part 30 is located below the lower end 53 of the outer shape of the drain connection part 50. The water storage surface 71 in the toilet bowl part 20 is located above the center 51C of the downstream end opening 51 of the drain connection part 50. According to this configuration, while sufficiently ensuring the depth of the water in the water storage part 70, the distance from the upper surface of the toilet bowl part 20 to the water storage surface 71 can be made shallow.

[0027] The drain connection part 50 extends downward from the front to the rear. According to this configuration, since the flushing water flows downward inside the drain connection part 50 and flows out to the drain pipe in the wall, the flushing water can be discharged well.

[0028] The rear end of the drain connection part 50 is located in front of the rear end 18 at the lower end 12 of the toilet body 10. According to this configuration, the toilet body 10 can be arranged closer to the wall, so that the space in the toilet room can be effectively utilized.

[0029] The toilet bowl body 10 has a communication section 40 between the trap section 30 and the drain connection section 50. The left-right dimension 41L of the communication space 41 inside the communication space 40 on the plane that intersects the extension direction of the second descending passage 16 is larger than the inner diameter dimension 54 of the drain connection section 50 on the plane that intersects the center line 50L of the drain connection section 50. With this configuration, a communication space 41 that is wider in the left-right direction than the inside of the drain connection section 50 is formed on the upstream side of the drain connection section 50, making it less likely for dirt and other debris to clog the communication space 41, especially near the wear 32.

[0030] As shown in Figure 1, when the angle of the imaginary line L1 passing through the center P1 of the outlet 26 and the lowest point P2 with respect to the horizontal plane is defined as the first angle α1, and the angle of the imaginary line L2 passing through the lowest point P2 and the highest point P3 with respect to the horizontal plane is defined as the second angle α2, the second angle α2 is greater than the first angle α1. With this configuration, by making the bend in the trap section 30 gentler, waste, paper, etc. can be allowed to pass through smoothly. As a result, the washing water flows smoothly through the bend in the trap section 30, and the stagnation downstream past the lowest point P2 of the trap section 30 can be reduced.

[0031] As shown in Figure 1, when the angle of the imaginary line L3 passing through the uppermost point P3 and the center P4 of the upstream end opening of the drain connection part 50 with respect to the horizontal plane is defined as the third angle α3, the third angle α3 is greater than the first angle α1. With this configuration, backflow of the washing water can be suppressed. Dirt, paper, etc. can be washed away by gravity. It is even better if the third angle α3 is greater than the second angle α2.

[0032] <Other Embodiments> This disclosure is not limited to the embodiments described above and in the drawings, and the technical scope of this disclosure also includes, for example, the following embodiments. (1) In the above embodiment, the height position of the drain pipe in the wall was given as an example. However, the height position of the drain pipe in the wall may be any height. (2) In the above embodiment, the center line 50L of the drainage connection 50 extends downward from the upstream side to the downstream side. However, the center line of the drainage connection 50 may extend horizontally or upward from the upstream side to the downstream side. (3) In the above embodiment, the rear end 52 of the drain connection portion 50 is located in front of the rear end 18 of the lower end 12 of the toilet bowl body 10. However, the rear end of the drain connection portion may be located behind the rear end of the lower end of the toilet bowl body. (4) In the above embodiment, the left-right dimension 41L of the communication space 41 is larger than the inner diameter dimension 54 of the drain connection part 50. However, the left-right dimension of the communication space may be smaller than the inner diameter dimension of the drain connection part. (5) In the above embodiment, the water outlet 24 is provided on the right side of the rear of the toilet bowl 20. However, the water outlet may also be provided on the front of the toilet bowl (the area in front of the center in the front-to-back direction of the toilet bowl when viewed in plan), or on the left side of the center in the left-to-right direction of the toilet bowl. When the water outlet is provided on the front of the toilet bowl, the washing water discharged from the water outlet flows out into the bowl toward the rear. [Explanation of symbols]

[0033] α1…First angle, α2…Second angle, α3…Third angle, L1…Imaginary line passing through the center of the trap entrance and the lowest point, L2…Imaginary line passing through the lowest point and the highest point, L3…Imaginary line passing through the highest point and the center of the upstream end opening of the drain connection, T…Flush toilet, 12…Lower end of the toilet body, 18…Rear end at the lower end, 20…Toilet bowl part, 30…Trap part, 30L…Centerline of the trap part, 32…Wear, 35…Trap part 40...Lower end of outer shape, 41...Communication section, 41...Communication space, 41L...Dimension in the left-right direction, 50...Drain connection section, 50L...Centerline of the drain connection section, 51...Downstream end opening (opening at the downstream end of the drain connection section), 51C...Center, 52...Rear end of the drain connection section, 53...Lower end of the outer shape of the drain connection section, 54...Inner diameter dimension, 71...Water level, P1...Center of the entrance to the trap section, P2...Lowest point, P3...Highest point, P4...Center of the upstream end opening of the drain connection section

Claims

1. The toilet bowl section, A trap section provided downstream of the toilet bowl section, The toilet bowl body includes a drainage connection part provided downstream of the trap section and connected to a drain pipe in the wall, A flush toilet in which the lower end of the outer shape of the trap portion is located below the lower end of the outer shape of the drain connection portion, and the water level in the toilet bowl portion is located above the center of the opening at the downstream end of the drain connection portion.

2. The flush toilet according to claim 1, wherein the drain connection portion extends downward from the front to the rear.

3. The flush toilet according to any one of claims 1 to 2, wherein the rear end of the drain connection portion is located in front of the rear end of the lower end of the toilet bowl body.

4. The toilet bowl body has a communication section between the trap section and the drain connection section. A flush toilet according to any one of claims 1 to 3, wherein the left-right dimension of the interior of the communication portion is greater than the inner diameter dimension of the drain connection portion on a plane intersecting the center line of the drain connection portion.

5. The lowest point is defined as the intersection of a vertical plane that passes through the lower end of the outer shape of the trap portion and is perpendicular to the center line of the trap portion, and the center line of the trap portion. The uppermost point is defined as the intersection of a vertical plane perpendicular to the center line of the trap portion, passing through the garment of the trap portion, and the center line of the trap portion. The first angle is defined as the angle between the imaginary line passing through the center of the entrance to the trap section and the lowest point and the horizontal plane. When the angle of the imaginary line passing through the lowest point and the highest point with respect to the horizontal plane is taken as the second angle, A flush toilet according to any one of claims 1 to 4, wherein the second angle is greater than the first angle.

6. The toilet bowl body has a communication section between the trap section and the drain connection section. The lowest point is defined as the intersection of a vertical plane passing through the lower end of the outer shape of the trap portion and perpendicular to the center line of the trap portion, and the center line of the trap portion. The uppermost point is defined as the intersection of a vertical plane passing through the garment of the trap portion and perpendicular to the center line of the trap portion, and the center line of the trap portion. The first angle is defined as the angle of the imaginary line passing through the center of the entrance to the trap section and the lowest point with respect to the horizontal plane. When the angle of the imaginary line passing through the uppermost point and the center of the upstream end opening of the drainage connection section with respect to the horizontal plane is defined as the third angle, The flush toilet according to any one of claims 1 to 5, wherein the third angle is greater than the first angle.

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