WO2017038258A1 - 水洗式便器 - Google Patents

水洗式便器 Download PDF

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Publication number
WO2017038258A1
WO2017038258A1 PCT/JP2016/070690 JP2016070690W WO2017038258A1 WO 2017038258 A1 WO2017038258 A1 WO 2017038258A1 JP 2016070690 W JP2016070690 W JP 2016070690W WO 2017038258 A1 WO2017038258 A1 WO 2017038258A1
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WO
WIPO (PCT)
Prior art keywords
shelf
water
slope
toilet bowl
overhang
Prior art date
Application number
PCT/JP2016/070690
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English (en)
French (fr)
Japanese (ja)
Inventor
康宏 近藤
岳也 一柳
Original Assignee
株式会社Lixil
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2015172294A external-priority patent/JP6411976B2/ja
Priority claimed from JP2015172295A external-priority patent/JP6411977B2/ja
Application filed by 株式会社Lixil filed Critical 株式会社Lixil
Priority to CN201680049178.2A priority Critical patent/CN107923173B/zh
Priority to EP16841290.6A priority patent/EP3346065B1/de
Publication of WO2017038258A1 publication Critical patent/WO2017038258A1/ja

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    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03DWATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D11/00Other component parts of water-closets, e.g. noise-reducing means in the flushing system, flushing pipes mounted in the bowl, seals for the bowl outlet, devices preventing overflow of the bowl contents; devices forming a water seal in the bowl after flushing, devices eliminating obstructions in the bowl outlet or preventing backflow of water and excrements from the waterpipe
    • E03D11/02Water-closet bowls ; Bowls with a double odour seal optionally with provisions for a good siphonic action; siphons as part of the bowl
    • E03D11/08Bowls with means producing a flushing water swirl

Definitions

  • the present invention relates to a flush toilet, and more particularly, to a flush toilet of the type in which a toilet bowl is washed by a swirling water flow.
  • a cleaning system In flush toilets, a cleaning system is known in which cleaning water is discharged from one or more water outlets to the toilet bowl, and filth is pushed out to the drain pipe by the force of the cleaning water.
  • discharge force the force that pushes filth out of the toilet bowl into the drain pipe.
  • discharge force the force that pushes filth out of the toilet bowl into the drain pipe.
  • cleaning power the power to wash the toilet bowl inner wall.
  • Patent Document 1 In recent years, functional parts such as a local cleaning device and a hot air device are often attached to the rear of a flush toilet.
  • the nozzle In Patent Document 1, the nozzle is covered with a cover member that is substantially flush with the inner wall surface of the rear end of the toilet bowl in order to prevent the nozzle of the local cleaning device from becoming dirty.
  • Patent Document 1 considers nozzle dirt as a problem, it seems that the dirt on the nozzle lid member is premised on the user's wiping and cleaning (see paragraph [0032] of Patent Document 1).
  • flush toilets are required to have two functions: discharge power and cleaning power. This requires a design that can skillfully change the course without killing the momentum of the wash water. In addition, there is a demand for a structure that can accommodate mounting of functional units such as a local cleaning device.
  • the main object of the present invention is to propose a new design for enhancing the cleaning power and the discharging power in a flush toilet.
  • the flush toilet bowl has a toilet bowl portion, a main body portion having a first upper surface at a high position and a second upper surface at a low position, and a circumferential direction of the toilet bowl portion on an inner wall surface of the toilet bowl portion. And a water discharge outlet formed to discharge water to the water supply shelf.
  • the water guide shelf has a first shelf formed at a position corresponding to the first upper surface and a second shelf formed at a position corresponding to the second upper surface. The second shelf is formed at a lower position than the first shelf.
  • a flush toilet in another aspect of the present invention includes a toilet bowl, and a water guide shelf formed in the circumferential direction on the inner wall surface of the toilet bowl, and having a first shelf at a high position and a second shelf at a low position. And a first water outlet formed on the first shelf and a second water outlet formed on the second shelf and formed at a position lower than the first water outlet.
  • the first shelf and the second shelf are connected by a smooth shelf slope.
  • FIG. 1 is an external perspective view of a flush toilet 100.
  • FIG. A toilet bowl 106 is formed on the main body 144 of the flush toilet 100.
  • the main body 144 discharges cleaning water stored in an external tank from the first water outlet 102 and the second water outlet 104 to the toilet bowl 106.
  • a part of the cleaning water is also discharged from the third water outlet, which will be described later with reference to FIG.
  • the third water outlet may be a so-called jet water outlet.
  • the first water discharge port 102 is formed on the side surface (y-axis negative direction side) of the toilet bowl 106.
  • the second water discharge port 104 is formed on the rear end surface (x-axis negative direction side) of the toilet bowl 106.
  • a water guide shelf 108 is formed in an annular shape around the inner wall of the toilet bowl 106. Wash water discharged from the second water outlet 104 (hereinafter referred to as “second wash water”) flows on the water guide shelf 108, and most of the water falls into the toilet bowl 106 in front of the first water outlet 102. However, the remainder merges with cleaning water discharged from the first water outlet 102 (hereinafter referred to as “first cleaning water”). The first washing water swirls on the water guide shelf 108 to wash the entire toilet bowl 106, particularly the front surface and both side surfaces of the inner wall.
  • the upper surface of the toilet bowl 106 is formed as a stepped surface having a first upper surface 110 at a high position and a second upper surface 112 at a low position.
  • the second upper surface 112 in the first embodiment forms a flat bottom surface of the recess 138 with respect to the upper surface.
  • the second upper surface 112 is not necessarily flat, and may be formed as a surface that curves downward or upward, or a protrusion or a cutout may be formed on a part of the second upper surface 112.
  • a functional unit (not shown) that provides a local cleaning function, a hot air function, or the like is placed in the recess 138 (upper part of the second upper surface 112).
  • the second upper surface 112 and the first upper surface 110 are smoothly connected by the two upper surface inclined surfaces 140a and 140b to form an annular upper surface having a height difference.
  • the water guide shelf 108 includes a first shelf 114 at a high position and a second shelf 116 at a low position.
  • the first shelf 114 is formed at a position corresponding to the first upper surface 110
  • the second shelf 116 is formed at a position corresponding to the second upper surface 112.
  • “corresponding position” means that it corresponds in the vertical direction (z-axis direction), in other words, that it is in a position that overlaps in plan view.
  • the first shelf 114 (high shelf) is formed so as to correspond to 90% or more of the inner circumference of the first upper surface 110 (high surface), and the second shelf 112 (low surface)
  • the second shelf 116 (low shelf) is formed so as to correspond to 90% or more of the circumference (see also FIG. 2).
  • the first shelf 114 is longer than the second shelf 116.
  • the first shelf portion 114 and the second shelf portion 116 are also provided with a height difference in the water guide shelf 108.
  • the first shelf 114 and the second shelf 116 are connected by a smooth slope (shelf slope 120a) (described in more detail in connection with FIG. 2).
  • Shelf slope 120a “Smooth” in the present specification means that each surface is connected continuously, in other words, without having a discontinuous surface.
  • the upper surface (the first upper surface 110, the second upper surface 112, and the upper surface slopes 140a and 140b) protrudes inward, whereby an overhang 118 (rim return) is formed over the entire circumference.
  • the overhang 118 is, so to speak, a roof with respect to the water guide shelf 108, and a water passage is formed by the water guide shelf 108 and the overhang 118.
  • the overhang 118 in the first embodiment is formed in an annular shape over the entire inner periphery of the toilet bowl 106.
  • the water guide shelf 108 forms a substantially parallel surface with the overhang 118 mainly in the horizontal direction (water flow direction) except for a part. More specifically, the lower surface of the overhang 118 (the surface facing the water guide shelf 108) is substantially parallel to the upper surface of the water guide shelf 108 in the water flow direction.
  • FIG. 2 is a top view of the flush toilet 100.
  • FIG. FIG. 3 is a side sectional view of the toilet bowl 106.
  • FIG. 4 is a front sectional view of the toilet bowl 106.
  • FIG. 5 is a schematic diagram showing a water flow with respect to the storage region 122.
  • the water guide shelf 108 is an annular shelf formed on the entire inner wall surface of the toilet bowl 106.
  • the first shelf 114 and the second shelf 116 are smoothly connected by the shelf slope 120a and the shelf slope 120b. Both the shelf slope 120a and the shelf slope 120b are within the rear half of the inner peripheral surface of the toilet bowl 106 in plan view (in the negative z-axis direction in FIG. 2).
  • the shelf slope 120a is a slope on which the second wash water rises
  • the shelf slope 120b is a slope on which the first wash water descends.
  • the shelf slope 120a and the shelf slope 120b are positioned symmetrically with respect to the central axis M (x-axis direction in FIG. 2) of the toilet bowl 106.
  • the first shelf 114 and the second shelf 116 may both be horizontally extending shelves, but the first shelf 114 is gently raised near the front end as shown in FIG. Also good.
  • the shelf slopes 120 a and 120 b are formed to be steeper than the slope of the first shelf 114.
  • the first shelf 114 extends horizontally.
  • the water guide shelf 108 is axisymmetric with respect to the central axis M, and is an annular shelf having a height difference in which the first shelf 114 and the second shelf 116 are smoothly connected by the shelf slopes 120a and 120b. .
  • the overhang 118 is formed around the rim of the toilet bowl 106.
  • the overhang 118 includes a first overhang 130 formed at a high position corresponding to the first upper surface 110 and a second overhang 132 formed at a low position corresponding to the second upper surface 112.
  • the first overhang 130 and the second overhang 132 are smoothly connected by the slope overhangs 134a and 134b.
  • the slope overhang 134a corresponds to the top slope 140a and the shelf slope 120a
  • the slope overhang 134b corresponds to the top slope 140b and the shelf slope 120b.
  • the slope overhang 134a and the slope overhang 134b are also accommodated in the half on the rear end side of the inner peripheral surface of the toilet bowl 106 in a plan view (in the z-axis negative direction in FIG. 2).
  • the slope overhang 134a and the slope overhang 134b are positioned symmetrically with respect to the central axis M (the x-axis direction in FIG. 2) of the toilet bowl 106.
  • the overhang 118 is axisymmetric with respect to the central axis M, and the first overhang 130 and the second overhang 132 are smoothly connected by the slope overhangs 134a and 134b. (Rim return).
  • both the overhang 118 and the water guide shelf 108 in the first embodiment are formed so as to be symmetric with respect to the central axis M, the design of the flush toilet 100 as a whole is easy to maintain. .
  • the second water discharge port 104 is formed on the shelf slope 120b side on the right side of the rear end of the second shelf portion 116.
  • the first water outlet 102 is formed on the first shelf 114.
  • washing water that has flowed into the toilet bowl 106 from the first water outlet 102 or the second water outlet 104 is discharged from the discharge port 128 of the storage region 122 to a sewer pipe (not shown), but a part is stored.
  • the toilet bowl 106 and the sewer pipe are sealed by being stored in the region 122.
  • a third water outlet 124 is further formed on the side surface of the storage region 122.
  • a part of the wash water supplied from the tank of the flush toilet 100 is discharged from the first spout 102 as the first wash water S1 (course C1), and a part is second from the second spout 104 (course C2).
  • Course C3 all show the main flow of washing water from each water outlet.
  • the filth collected in the storage region 122 by the first cleaning water S1 and the second cleaning water S2 is pushed out to the discharge port 128 at the back of the storage region 122 by the third cleaning water S3.
  • 1st spout 102 is formed in the upper part (rim
  • the first wash water S1 discharged from the first water outlet 102 swirls over the water guide shelf 108 (first shelf 114) in a counterclockwise direction, and the front surface and both side surfaces of the inner wall surface of the toilet bowl 106. Clean the area.
  • the first washing water S1 turns off the first shelf 114, loses kinetic energy before reaching the shelf slope 120b, goes off the course, and falls into the storage region 122 (see S1 in FIG. 2).
  • the second washing water S2 discharged from the second water outlet 104 locally washes the upper rear end surface of the toilet bowl 106 by passing through the water guiding shelf 108 (second shelf 116), and the rising slope of the shelf slope 120a.
  • the course goes out due to the difference in height and falls into the storage area 122 (see S2 in FIG. 2).
  • the shelf slope 120a is located on the rear side of the opening R (see FIG. 3) of the storage region 122. More specifically, when the midpoint in the x direction (front-rear direction) of the opening R is P, the shelf slope 120a is formed at a position that falls within the rear end side and the left side of the midpoint P in plan view.
  • the 2nd wash water S2 climbs the shelf slope 120a, it flows into the storage area
  • most of the second shelf 116 and the first shelf 114 are both formed in the horizontal direction.
  • the first shelf 114 is formed at a position higher than the second upper surface 112 of the recess 138 (see FIG. 4).
  • the “main flow” here means 60% or more, preferably 80% or more, more preferably 95% or more of the total amount of the second wash water S2 discharged from the second water discharge port 104.
  • the ratio of the water flow falling without joining the first wash water S1 is the position and size of the second spout 104, the flow rate of the second wash water S2, the shelf slope 120a. Simulation calculation is possible based on various parameters such as shape and rising angle.
  • the first washing water S1 provides a wide range of washing power and drainage power by turning from the right side after turning the inner wall of the toilet bowl 106.
  • the second washing water S2 provides local cleaning power and drainage power to the rear end surface by washing the rear end surface of the toilet bowl 106 that is particularly dirty and then dropping from the left end of the rear end.
  • the third wash water S3 provides a discharge force by stirring the storage region 122 and pushing out filth to the discharge port 128.
  • filth 126 is collected in the storage area 122. Some of them float in the stored water, such as filth 126a to 126c, and some settle like filth 126d.
  • the first wash water S1 and the second wash water S2 fall into the storage area 122 from different directions, and the filths 126a to 126c are submerged in the storage area 122.
  • the third wash water S3 collectively pushes the filths 126a to 126d collected at the bottom of the storage area 122 to the discharge port 128.
  • the force that sinks the filth 126 in the storage area 122 is referred to as “sinking force”. In order to surely sink the floating filth 126, it is desirable that a certain amount of washing water is dropped from a sufficient height.
  • the sinking force of the first cleaning water S1 is applied to the filths 126a and 126b, but the filth 126c is not directly below the first cleaning water S1, and thus is not easily subjected to the sinking force by the first cleaning water S1.
  • the filth 126c since the filth 126c is directly under the second wash water S2, it receives a sinking force due to the second wash water S2.
  • the first washing water S1 and the second washing water S2 fall from the left and right directions, so that the sinking force can be effectively provided to the filth 126 that floats.
  • the second cleaning water S2 may be dropped by colliding the second cleaning water S2 after rising the shelf slope 120a with the back surface of the overhang 118 (which will be described in more detail with reference to FIG. 6). For that purpose, it is desirable to form the overhang 118 so that the second washing water S2 protrudes particularly large at the point where the second washing water S2 rises up the shelf slope 120a and enters the first shelf 114. Since the second wash water S2 that has not fallen down joins the first wash water S1, the second wash water S2 can be used efficiently without waste.
  • FIG. 6 is a diagram schematically showing the elevation relationship between the first shelf 114 and the second shelf 116 in the first embodiment.
  • FIG. 7 is a diagram schematically showing the height relationship between the first shelf 114 and the second shelf 116 in the comparative example. The difference between FIG. 6 and FIG. 7 is whether or not the shelf slope 120 a is parallel to the overhang 118 near the second shelf 116.
  • the height of the second shelf 116 is H2
  • the height of the first shelf 114 is H1.
  • the height of the back surface of the second overhang 132 corresponding to the second upper surface 112 is H3
  • the height of the back surface of the first overhang 130 corresponding to the first upper surface 110 is H4.
  • the height of the second upper surface 112 (the upper surface of the second overhang 132) is H5
  • the height of the first upper surface 110 (the upper surface of the first overhang 130) is H6.
  • the boundary point between the second shelf 116 and the shelf slope 120a is P1
  • the boundary point between the shelf slope 120a and the first shelf 114 is P3
  • the intermediate point between P1 and P3 is P2.
  • the position of the 1st water outlet 102 is set to P4.
  • the second wash water S2 discharged from the second water discharge port 104 passes through the second shelf 116, climbs the shelf slope 120a, and falls toward the storage region 122 while rotating by losing kinetic energy.
  • the second wash water S ⁇ b> 2 may collide with the back surface of the first overhang 130 and be bounced back toward the storage area 122. Therefore, it is desirable that an overhang 118 having a sufficiently large size be formed at least at a point where the second cleaning water S2 that has passed through the shelf slope 120a moves up the shelf slope 120a and enters the first shelf 114. More specifically, it is desirable that the first overhang 130 is formed at least in the sections P3 to P4.
  • the shelf slope 120a and the slope overhang 134a are at least partially parallel in the water flow direction. More specifically, at least in the sections P1 and P2, the shelf slope 120a and the back surface of the overhang 118 (slope overhang 134a) thereover are substantially parallel.
  • substantially parallel means that the difference between the rising angle of the shelf slope 120a and the rising angle of the slope overhang 134a is within 5%, preferably within 1%.
  • substantially parallel means that the difference between the surface angles of the two surfaces is within 5%, preferably within 1%. As shown in the comparative example of FIG.
  • the shelf slope 120a is substantially parallel to the upper slope 140a as well as the slope overhang 134a in the water flow direction.
  • the shelf slope 120a is smoothly connected to the second shelf portion 116, the second washing water can be smoothly guided to the shelf slope 120a while maintaining the water flow.
  • the second wash water that has climbed the shelf slope 120a partially falls after passing P3, and a part of the second wash water collides with the back surface of the first overhang 130 and is bounced back. For this reason, the shelf slope 120a needs a certain angle. It is desirable that the shelf slope 120a includes an inclined surface of 10 degrees or more, preferably 35 degrees or more.
  • the shelf slope 120a and the slope overhang 134a are substantially parallel to the slope direction.
  • the second shelf 116 and the second overhang 132 are substantially parallel to the horizontal direction
  • the first shelf 114 and the first overhang 130 are substantially parallel to the horizontal direction.
  • Both the water guide shelf 108 and the overhang 118 are formed in an annular shape on the entire circumference of the toilet bowl 106, but the overhang 118 and the water guide shelf in the section of 80% or more, preferably 90% or more of the whole circumference of the water guide shelf 108. It is desirable that 108 is substantially parallel.
  • the upper surface (first upper surface 110, second upper surface 112, upper surface inclined surface 140a, upper surface inclined surface 140b) and the water guiding shelf 108 are substantially parallel in a section of 80% or more, preferably 90% or more of the entire circumference of the water guiding shelf 108. It is desirable to be.
  • the water guide shelf 108 By forming the water guide shelf 108 so that the overhang 118 and the water guide shelf 108 or the upper surface and the water guide shelf 108 are substantially parallel to each other, the overall harmony of the design of the flush toilet 100 can be enhanced.
  • the second shelf 116 may be formed at a position lower than H2 in FIG. However, in this case, the potential energy of the second cleaning water becomes small. Moreover, since the direction which narrowed the water flow path of the 2nd shelf part 116 can raise the pressure of 2nd washing water, a rear-end surface can be wash
  • the first shelf 114 may be formed at a position higher than H1 in FIG.
  • the opening of the first water outlet 102 becomes small, and the amount of water discharged from the first water outlet 102 becomes small. Since it is necessary to provide sufficient first wash water S1 to the long first shelf 114, and in particular, it is necessary to provide a sufficient amount of water to the front end portion of the toilet bowl 106, the discharge of the first spout 102 is required. It is not preferable to add structural restrictions to the amount of water.
  • the height difference D2 between the first shelf portion 114 and the second shelf portion 116 by providing the height difference D2 between the first shelf portion 114 and the second shelf portion 116, the height difference D1 between the first upper surface 110 and the second upper surface 112 can be accommodated.
  • the water guide shelf 108 is formed to satisfy ⁇ T1 (D2 ⁇ D1). Such a configuration balances cleanliness and design harmony.
  • the height T2 of the water passage of the second shelf 116 is lower than the height T1 of the water passage of the first shelf 114. It is desirable that at least the average height of the water passage of the second shelf 116 is lower than the average height of the water passage of the first shelf 114.
  • the vertical width of the water passage has expanded from T2 to T1.
  • the vertical width of the water passage is maintained at T2 in the sections P1 to P2, and the vertical width is increased from T2 to T1 in the sections P2 to P3.
  • the vertical width of the water passage should be enlarged.
  • the vertical width of the water passage is maintained at T2 in the sections P1 and P2, it is more preferable because the blind spot area 136 (unwashed area) is less likely to occur as described above.
  • the toilet bowl 106 is particularly susceptible to dirt on the rear end surface. It is better to run the wash water at a flow rate as high as possible in a place that is easily contaminated. Since the sections P2 to P3 are less likely to get dirty than the sections P1 to P2, it is preferable to increase the vertical width of the water passage in the sections P2 to P3 rather than the sections P1 to P2.
  • the second washing water S2 discharged from the second water discharge port 104 ascends the shelf slope 120a, passes through P2, and diffuses in the vertical direction in the sections P2 to P3. A part of the water falls and a part collides with the back surface of the first overhang 130 and falls.
  • the overhang 118 forms a water passage and prevents filth and washing water from splashing on the first upper surface 110 and the second upper surface 112.
  • the second overhang 132 prevents scattering of filth and cleaning water to the functional unit placed on the second upper surface 112.
  • the dirt scattered on the rear end surface is prevented from scattering upward by the back surface of the second overhang 132, and the back surface of the second overhang 132 is washed away with the second washing water S2.
  • the course of the second wash water S2 is changed (out of course) in the drop direction by the vertical inclination of the shelf slope 120a. If the shelf slope 120a and the overhang 118 are combined, the direction of the water flow can be changed more easily and efficiently.
  • the design constraint of the water guide shelf 108 due to the presence of the recess can be used rather positively.
  • the speed of the cleaning water can be increased or decreased, or the cleaning water can be actively out of the water guiding shelf 108.
  • the first cleaning water S1 turns on the first shelf 114 while maintaining the potential energy. Then, the course goes out before the shelf slope 120 b and falls into the storage region 122.
  • the second cleaning water S2 passes through a narrow water passage on the second shelf 116 at a high speed to clean the rear end surface, and ascends the shelf slope 120a and goes out of the course. Further, a part of the second washing water S ⁇ b> 2 jumping out from the shelf slope 120 a is strongly bounced back to the storage region 122 by the overhang 118.
  • the second wash water S2 is courseed out in the falling direction due to the height difference in the shelf slope 120a.
  • a part of the first wash water S1 may join the second wash water S2 after passing through the shelf slope 120b.
  • the second wash water S2 is slowed down. It is desirable that the ratio of merging with water S2 is less than 20%, preferably less than 10%.
  • a concave portion is formed in order to mount a functional portion at the rear end portion of the flush toilet 100, and a step surface such as a first upper surface 110 and a second upper surface 112 is provided for this purpose.
  • the invention is not limited to the concave portion, and can be applied to the design in the case where the water guide shelf 108 is formed corresponding to the upper surface step.
  • the width of the water guide shelf 108 does not need to be constant, and may vary depending on the location.
  • the water guide shelf 108 does not need to be horizontal, and may be inclined or curved with respect to a horizontal plane.
  • the water guide shelf 108 does not need to go around the entire circumference of the toilet bowl 106 one by one, and may have a partial discontinuous region (such as a lack).
  • Modification 2 In the first embodiment, the back surface of the overhang 118 and the top surface of the water guide shelf 108 both form a horizontal plane. For this reason, the water flow path between the overhang 118 and the water guide shelf 108 forms a rectangular cross section (see region U in FIG. 4). As a modification, the overhang 118 and the water guide shelf 108 may be smoothly connected to form the water passage as an arc-shaped cross section. In the present invention, the overhang 118 is optional and not an essential component.
  • the flush toilet bowl has a toilet bowl portion, a main body portion having a first upper surface at a high position and a second upper surface at a low position, and a circumferential direction of the toilet bowl portion on an inner wall surface of the toilet bowl portion. And a water discharge outlet formed to discharge water to the water supply shelf.
  • the water guide shelf has a first shelf formed at a position corresponding to the first upper surface and a second shelf formed at a position corresponding to the second upper surface.
  • the second shelf is formed at a lower position than the first shelf.
  • the water guide shelf is also provided with a height difference, and the water flow can be controlled by the height difference of the water guide shelf.
  • the second shelf may be connected to the first shelf by a smooth shelf slope. By smoothly connecting the first shelf and the second shelf, it is easy to maintain the water flow of the cleaning water.
  • the first upper surface and the second upper surface may be connected by a smooth upper surface slope.
  • the shelf slope may be a slope substantially parallel to the top slope.
  • An overhang portion protruding inside may be further formed on the upper surface slope of the main body portion.
  • the shelf slope may be a slope substantially parallel to the overhang portion.
  • a first water outlet and a second water outlet may be formed in the toilet bowl portion.
  • the first water outlet may be formed to discharge water to the first shelf
  • the second water outlet may be formed to discharge water to the second shelf.
  • the water guide shelf may be formed in an annular shape over the entire circumference of the toilet bowl portion, and may be formed substantially parallel to the overhang portion in at least 80% or more of the entire circumference.
  • the average interval between the first shelf and the first upper surface may be larger than the average interval between the second shelf and the second upper surface.
  • the distance between the water guide shelf and the upper surface may be increased.
  • a recess may be formed at the rear end of the upper surface of the toilet bowl.
  • the second top surface may correspond to the bottom surface of the recess. In the range from the boundary point between the second shelf and the shelf slope to the first water outlet formed in the toilet bowl, the distance between the water guide shelf and the upper surface may be increased.
  • the flush toilet bowl includes a main body portion in which a toilet bowl portion is formed, and an inner wall surface of the toilet bowl portion that is formed in a circumferential direction, and includes a first shelf portion at a high position and a second shelf at a low position.
  • a water guide shelf having a portion, a first water outlet formed to discharge water to the first shelf, and a water outlet formed to discharge water to the second shelf and formed at a position lower than the first water outlet. 2 spouts.
  • the first shelf and the second shelf may be connected by a smooth shelf slope. By connecting the first shelf and the second shelf with a smooth shelf slope, the wash water can be guided in the falling direction by the difference in the height of the shelf slope while maintaining the water flow of the wash water.
  • An overhang portion may be formed on the upper surface of the toilet bowl at a point where at least the washing water that has passed through the second shelf rises up the shelf slope and enters the first shelf.
  • a storage area for storing wash water may be formed at the bottom of the toilet bowl.
  • the main stream of water discharged from the second water outlet may fall into the storage area without joining the water discharged from the first water outlet in the first shelf. It becomes easy to strengthen discharge power by dropping the main stream of the water discharged from the second water outlet before joining the water discharged from the first water outlet.
  • the amount of water that rises on the shelf slope and joins the water discharged from the first water outlet may be less than 20% of the total water amount.
  • the shelf slope where water discharged from the second water outlet rises may have an inclined surface of 10 degrees or more.
  • the water guide shelf may be formed in an annular shape over the entire circumference of the toilet bowl portion by connecting the first shelf portion and the second shelf portion by two shelf slopes. Both of these two shelf slopes may be formed on the rear half portion side of the toilet bowl in plan view.
  • the first shelf may be longer than the second shelf.
  • the shelf slope where the wash water that has passed through the second shelf rises toward the first shelf may be formed on the side of the storage area formed at the bottom of the toilet bowl in plan view.
  • FIG. 8 is an external perspective view of the flush toilet 200.
  • FIG. A toilet bowl 206 is formed on the main body 244 of the flush toilet 200.
  • the main body 244 discharges wash water stored in an external tank from the first water outlet 202 and the second water outlet 204 to the toilet bowl 206.
  • a part of the cleaning water is also discharged from the third water outlet, which will be described later with reference to FIG.
  • the third water outlet may be a so-called jet water outlet.
  • the first water discharge port 202 is formed on the side surface (the y-axis negative direction side) of the toilet bowl 206.
  • the second water outlet 204 is formed on the rear end surface (x-axis negative direction side) of the toilet bowl 206.
  • a water guide shelf 208 is formed in an annular shape around the inner wall of the toilet bowl 206. Wash water discharged from the second water outlet 204 (hereinafter referred to as “second wash water”) flows on the water guide shelf 208, and most of the water falls into the toilet bowl 206 in front of the first water outlet 202. However, the remainder merges with the cleaning water discharged from the first water discharge port 202 (hereinafter referred to as “first cleaning water”). The first wash water swirls on the water guide shelf 208 to wash the entire toilet bowl 206, particularly the front and both sides of the inner wall.
  • the upper surface of the toilet bowl 206 is formed as a stepped surface having a first upper surface 210 at a high position and a second upper surface 212 at a low position.
  • the second upper surface 212 in the second embodiment forms a flat bottom surface of the recess 238 with respect to the upper surface.
  • the second upper surface 212 does not necessarily have to be flat, and may be formed as a surface that curves downward or upward, or a protrusion or a notch may be formed in a part of the second upper surface 212.
  • a functional unit (not shown) that provides a local cleaning function, a hot air function, or the like is placed in the recess 238 (upper part of the second upper surface 212).
  • the second upper surface 212 and the first upper surface 210 are smoothly connected by the two upper surface inclined surfaces 240a and 240b to form an annular upper surface having a difference in height.
  • the water guide shelf 208 includes a first shelf 214 at a high position and a second shelf 216 at a low position.
  • the first shelf 214 is formed at a position corresponding to the first upper surface 210
  • the second shelf 216 is formed at a position corresponding to the second upper surface 212.
  • “corresponding position” means that it corresponds in the vertical direction (z-axis direction), in other words, that it is in a position that overlaps in plan view.
  • the first shelf 214 (higher shelf) is formed so as to correspond to 90% or more of the inner circumference of the first upper surface 210 (higher surface), and the inner surface of the second upper surface 212 (lower surface).
  • the second shelf 216 (low shelf) is formed so as to correspond to 90% or more of the peripheral line (see also FIG. 9).
  • the first shelf 214 is longer than the second shelf 216.
  • the first shelf portion 214 and the second shelf portion 216 are also provided with a height difference in the water guide shelf 208.
  • the first shelf 214 and the second shelf 216 are connected by a smooth slope (shelf slope 220a) (described in more detail in connection with FIG. 9). “Smooth” in the present specification means that each surface is connected continuously, in other words, without having a discontinuous surface.
  • the upper surface protrudes inward, and an overhang 218 (rim return) is formed over the entire circumference.
  • the overhang 218 is a roof for the water guide shelf 208, and a water passage is formed by the water guide shelf 208 and the overhang 218.
  • the overhang 218 in the second embodiment is formed in an annular shape over the entire inner periphery of the toilet bowl 206.
  • the water guide shelf 208 forms a substantially parallel surface with the overhang 218 mainly in the horizontal direction (water flow direction) except for a part thereof. More specifically, the lower surface of the overhang 218 (the surface facing the water guide shelf 208) is substantially parallel to the upper surface of the water guide shelf 208 in the water flow direction.
  • FIG. 9 is a top view of the flush toilet 200.
  • FIG. FIG. 10 is a side sectional view of the toilet bowl 206.
  • FIG. 11 is a front sectional view of the toilet bowl 206.
  • FIG. 12 is a schematic diagram showing a water flow with respect to the storage region 222.
  • the water guide shelf 208 is an annular shelf formed on the entire inner wall surface of the toilet bowl 206.
  • the first shelf 214 and the second shelf 216 are smoothly connected by the shelf slope 220a and the shelf slope 220b. Both the shelf slope 220a and the shelf slope 220b are within the rear half of the inner peripheral surface of the toilet bowl 206 in plan view (in the negative z-axis direction in FIG. 9).
  • the shelf slope 220a is a slope on which the second wash water rises
  • the shelf slope 220b is a slope on which the first wash water descends.
  • the shelf slope 220a and the shelf slope 220b are positioned symmetrically with respect to the central axis M (x-axis direction in FIG. 9) of the toilet bowl 206.
  • Both the first shelf 214 and the second shelf 216 may be horizontally extending shelves, but the first shelf 214 is gently raised near the front end as shown in FIG. Also good.
  • the shelf slopes 220 a and 220 b are formed to be steeper than the slope of the first shelf 214.
  • the first shelf 214 extends horizontally.
  • the water guide shelf 208 is axisymmetric with respect to the central axis M, and is an annular shelf having a height difference in which the first shelf 214 and the second shelf 216 are smoothly connected by the shelf slopes 220a and 220b. .
  • the overhang 218 is formed on the entire rim of the toilet bowl 206.
  • the overhang 218 includes a first overhang 230 formed at a high position corresponding to the first upper surface 210 and a second overhang 232 formed at a lower position corresponding to the second upper surface 212.
  • the first overhang 230 and the second overhang 232 are smoothly connected by the slope overhangs 234a and 234b.
  • the slope overhang 234a corresponds to the upper surface slope 240a and the shelf slope 220a
  • the slope overhang 234b corresponds to the upper surface slope 240b and the shelf slope 220b.
  • the slope overhang 234a and the slope overhang 234b are also accommodated in the rear half of the inner peripheral surface of the toilet bowl 206 in a plan view (in the z-axis negative direction in FIG. 9).
  • the slope overhang 234a and the slope overhang 234b are positioned symmetrically with respect to the central axis M (the x-axis direction in FIG. 9) of the toilet bowl 206.
  • the overhang 218 is axisymmetric with respect to the central axis M, and the first overhang 230 and the second overhang 232 are smoothly connected to each other by the slope overhangs 234a and 234b. (Rim return).
  • both the overhang 218 and the water guide shelf 208 in the second embodiment are formed so as to be symmetric with respect to the central axis M, the design of the flush toilet 200 is easy to maintain. .
  • the second water discharge port 204 is formed on the shelf slope 220b side on the right side of the rear end in the second shelf 216.
  • the first water discharge port 202 is formed on the first shelf 214.
  • washing water that has flowed into the toilet bowl 206 from the first water outlet 202 or the second water outlet 204 is discharged from the discharge port 228 of the storage region 222 to a sewer pipe (not shown), but a part is stored.
  • the toilet bowl 206 and the sewer pipe are sealed by being stored in the region 222.
  • a third water outlet 224 is further formed on the side surface of the storage region 222.
  • a part of the washing water supplied from the tank of the flush toilet 200 is discharged from the first water outlet 202 as the first washing water S1 (course C1), and a part thereof is the second from the second water outlet 204 (course C2). It is discharged as cleaning water S2, and the rest is discharged as “third cleaning water S3” from the third water outlet 224 (course C3).
  • Courses C1 to C3 all show the main flow of washing water from each water outlet.
  • the filth collected in the storage area 222 by the first cleaning water S1 and the second cleaning water S2 is pushed out by the third cleaning water S3 to the discharge port 228 at the back of the storage area 222.
  • 1st spout 202 is formed in the upper part (rim
  • FIG. The first wash water S1 discharged from the first water outlet 202 swirls greatly on the water guide shelf 208 (first shelf 214) in the counterclockwise direction, and the front surface and both side surfaces of the inner wall surface of the toilet bowl 206. Clean the area.
  • the first wash water S1 turns around the first shelf 214, loses kinetic energy before reaching the shelf slope 220b, goes off the course, and falls into the storage region 222 (see S1 in FIG. 9).
  • the second wash water S2 discharged from the second water outlet 204 locally washes the upper rear end surface of the toilet bowl 206 by passing through the water guide shelf 208 (second shelf portion 216), and the rising slope of the shelf slope 220a.
  • the course goes out due to the height difference and falls into the storage area 222 (see S2 in FIG. 9).
  • the shelf slope 220a is located on the rear side of the opening R (see FIG. 10) of the storage region 222. More specifically, when the midpoint of the opening R in the x direction (front-rear direction) is P, the shelf slope 220a is formed at a position that falls within the rear end side and the left side of the midpoint P in plan view.
  • the 2nd wash water S2 climbs the shelf slope 220a, it flows into the storage area 222 directly after flowing through the side of the receiving surface 242 (see also FIG. 9).
  • most of the second shelf 216 and the first shelf 214 are both formed in the horizontal direction.
  • the first shelf 214 is formed at a position higher than the second upper surface 212 of the recess 238 (see FIG. 11).
  • the “main flow” here means 60% or more, preferably 80% or more, more preferably 95% or more of the total amount of the second washing water S2 discharged from the second water discharge port 204.
  • the ratio of the water flow that falls without joining the first wash water S1 is the position and size of the second water outlet 204, the flow rate of the second wash water S2, the shelf slope 220a. Simulation calculation is possible based on various parameters such as shape and rising angle.
  • the first wash water S1 provides a wide range of washing power and drainage power by turning from the right side after turning the inner wall of the toilet bowl 206.
  • the second cleaning water S2 provides local cleaning power and drainage power to the rear end surface by washing the rear end surface of the toilet bowl 206 that is particularly dirty and then dropping from the left end of the rear end.
  • the third wash water S3 provides a discharge force by stirring the storage region 222 and pushing out filth to the discharge port 228.
  • filth 226 is collected in the storage area 222. Some of them are floating in the stored water such as filth 226a to 226c, and some are settled like filth 226d.
  • the first wash water S1 and the second wash water S2 fall into the storage area 222 from different directions, and the filths 226a to 226c are submerged in the storage area 222.
  • the third wash water S3 collectively pushes the filths 226a to 226d collected at the bottom of the storage area 222 to the discharge port 228.
  • the force that sinks the filth 226 in the storage area 222 is referred to as “sinking force”. In order to sink the suspended filth 226 with certainty, it is desirable that a certain amount of washing water is dropped from a sufficient height.
  • the sinking force of the first cleaning water S1 is applied to the filths 226a and 226b, but the filth 226c is not directly below the first cleaning water S1, and thus is less susceptible to the sinking force by the first cleaning water S1.
  • the filth 226c since the filth 226c is directly under the second washing water S2, it receives a sinking force due to the second washing water S2.
  • the first washing water S1 and the second washing water S2 fall from the left and right directions, so that a sinking force can be effectively provided for the floating filth 226.
  • the second wash water S2 falls after washing the rear end surface of the toilet bowl 206, and during or after climbing the shelf slope 220a.
  • the shape of the inner wall surface of the toilet bowl 206, in particular, the curvature in plan view (xy plane) of the water passage is often changed.
  • the water flow direction is changed with the inclination of the up-down direction (z direction) of the shelf slope 220a. Since it is relatively easy to change the angle of the shelf slope 220a, it is easy to design for water flow control.
  • the second washing water S2 may be dropped by colliding the second washing water S2 after rising the shelf slope 220a with the back surface of the overhang 218 (which will be described in more detail with reference to FIG. 13). For that purpose, it is desirable to form the overhang 218 so as to protrude particularly large at the point where the second washing water S2 rises up the shelf slope 220a and enters the first shelf 214. Since the second wash water S2 that has not fallen down joins the first wash water S1, the second wash water S2 can be used efficiently without waste.
  • FIG. 13 is a diagram schematically showing the elevation relationship between the first shelf 214 and the second shelf 216 in the second embodiment.
  • FIG. 14 is a diagram schematically showing the height relationship between the first shelf 214 and the second shelf 216 in the comparative example. The difference between FIG. 13 and FIG. 14 is whether or not the shelf slope 220a is parallel to the overhang 218 in the vicinity of the second shelf 216.
  • the height of the second shelf 216 when the floor surface (installation surface) of the flush toilet 200 is used as a reference is H2, and the height of the first shelf 214 is H1.
  • the height of the back surface of the second overhang 232 corresponding to the second upper surface 212 is H3
  • the height of the back surface of the first overhang 230 corresponding to the first upper surface 210 is H4.
  • the height of the second upper surface 212 (the upper surface of the second overhang 232) is H5
  • the height of the first upper surface 210 (the upper surface of the first overhang 230) is H6.
  • the boundary point between the second shelf 216 and the shelf slope 220a is P1
  • the boundary point between the shelf slope 220a and the first shelf 214 is P3
  • the intermediate point between P1 and P3 is P2.
  • the position of the 1st water discharge port 202 is set to P4.
  • the second washing water S2 discharged from the second water outlet 204 passes through the second shelf 216, climbs the shelf slope 220a, and falls toward the storage region 222 while rotating by losing kinetic energy.
  • the second wash water S ⁇ b> 2 may collide with the back surface of the first overhang 230 and be bounced back toward the storage area 222. Accordingly, it is desirable that an overhang 218 having a sufficiently large size is formed at least at a point where the second cleaning water S2 that has passed through the shelf slope 220a rises on the shelf slope 220a and enters the first shelf 214. More specifically, it is desirable that the first overhang 230 is formed at least in the sections P3 to P4.
  • the shelf slope 220a and the slope overhang 234a are at least partially parallel in the water flow direction. More specifically, at least in the sections P1 and P2, the shelf slope 220a and the back surface of the overhang 218 (slope overhang 234a) thereover are substantially parallel.
  • substantially parallel means that the difference between the rising angle of the shelf slope 220a and the rising angle of the slope overhang 234a is within 5%, preferably within 1%.
  • substantially parallel means that the difference between the surface angles of the two surfaces is within 5%, preferably within 1%. As shown in the comparative example of FIG.
  • the shelf slope 220a is substantially parallel to the upper face slope 240a as well as the slope overhang 234a in the water flow direction.
  • the shelf slope 220a is smoothly connected to the second shelf 216, the second washing water can be smoothly guided to the shelf slope 220a while maintaining the water flow.
  • the second wash water that has climbed the shelf slope 220a partially falls after passing P3, and a part collides with the back surface of the first overhang 230 and is bounced back. For this reason, the shelf slope 220a needs a certain angle. It is desirable that the shelf slope 220a includes a sloped surface of 10 degrees or more, preferably 35 degrees or more.
  • the shelf slope 220a and the slope overhang 234a are substantially parallel to the slope direction.
  • the second shelf 216 and the second overhang 232 are substantially parallel to the horizontal direction
  • the first shelf 214 and the first overhang 230 are substantially parallel to the horizontal direction.
  • Both the water guide shelf 208 and the overhang 218 are formed in an annular shape on the entire circumference of the toilet bowl 206, but the overhang 218 and the water guide shelf in the section of 80% or more, preferably 90% or more of the whole circumference of the water guide shelf 208. It is desirable that 208 is substantially parallel.
  • the upper surface (first upper surface 210, second upper surface 212, upper surface inclined surface 240a, upper surface inclined surface 240b) and the water guiding shelf 208 are substantially parallel in a section of 80% or more, preferably 90% or more of the entire circumference of the water guiding shelf 208. It is desirable to be.
  • the water guide shelf 208 By forming the water guide shelf 208 so that the overhang 218 and the water guide shelf 208 or the top surface and the water guide shelf 208 are substantially parallel to each other, the overall harmony of the design of the flush toilet 200 can be enhanced.
  • the height difference D2 of the water guide shelf 208 is slightly relaxed compared to the height difference D1 between the first upper surface 210 and the second upper surface 212.
  • the second shelf 216 may be formed at a position lower than H2 in FIG. However, in this case, the potential energy of the second cleaning water becomes small. Moreover, since the direction which narrowed the water flow path of the 2nd shelf part 216 can raise the pressure of 2nd washing water, a rear-end surface can be wash
  • the first shelf 214 may be formed at a position higher than H1 in FIG.
  • the opening of the first water outlet 202 becomes small, and the amount of water discharged from the first water outlet 202 becomes small. Since it is necessary to provide sufficient first wash water S1 to the long first shelf 214, and in particular, it is necessary to provide a sufficient amount of water to the front end portion of the toilet bowl 206, the discharge from the first spout 202 is required. It is not preferable to add structural restrictions to the amount of water.
  • the height difference D2 between the first shelf 214 and the second shelf 216 by providing the height difference D2 between the first shelf 214 and the second shelf 216, the height difference D1 between the first upper surface 210 and the second upper surface 212 can be accommodated.
  • the water guide shelf 208 is formed so that ⁇ T1 (D2 ⁇ D1). Such a configuration balances cleanliness and design harmony.
  • the height T2 of the water passage of the second shelf 216 is lower than the height T1 of the water passage of the first shelf 214. It is desirable that at least the average height of the water channel of the second shelf 216 is lower than the average height of the water channel of the first shelf 214.
  • the vertical width of the water passage has expanded from T2 to T1.
  • the vertical width of the water passage is maintained at T2 in the sections P1 to P2, and the vertical width is increased from T2 to T1 in the sections P2 to P3.
  • the vertical width of the water passage should be enlarged.
  • the vertical width of the water passage is maintained at T2 in the sections P1 and P2, it is more preferable because the blind spot area 236 (unwashed area) is less likely to occur as described above.
  • the toilet bowl 206 is particularly susceptible to dirt on the rear end surface. It is better to run the wash water at a flow rate as high as possible in a place that is easily contaminated. Since the sections P2 to P3 are less likely to get dirty than the sections P1 to P2, it is preferable to increase the vertical width of the water passage in the sections P2 to P3 rather than the sections P1 to P2.
  • the second washing water S2 discharged from the second water discharge port 204 ascends the shelf slope 220a and passes through P2, and diffuses in the vertical direction in the sections P2 to P3. A part of the water falls and a part collides with the back surface of the first overhang 230 and falls.
  • the overhang 218 forms a water passage and prevents filth and washing water from splashing on the first upper surface 210 and the second upper surface 212.
  • the second overhang 232 prevents filth and cleaning water from scattering to the functional unit placed on the second upper surface 212.
  • the filth scattered on the rear end surface is prevented from scattering upward by the back surface of the second overhang 232, and the back surface of the second overhang 232 is washed away with the second washing water S2.
  • the course of the second wash water S2 is changed (out of course) in the drop direction by the vertical inclination of the shelf slope 220a. If the shelf slope 220a and the overhang 218 are combined, the direction of the water flow can be changed more easily and efficiently.
  • the design constraint of the water guiding shelf 208 due to the presence of the recess can be used rather positively.
  • the speed of the cleaning water can be increased or decreased, or the cleaning water can be actively out of the water guide shelf 208.
  • the first washing water S1 turns on the first shelf 214 while maintaining the potential energy. Then, the course goes out before the shelf slope 220 b and falls into the storage region 222.
  • the second cleaning water S2 passes through the narrow water passage on the second shelf 216 at a high speed to clean the rear end surface, and goes up the course by going up the shelf slope 220a. Further, a part of the second washing water S ⁇ b> 2 jumping out from the shelf slope 220 a is strongly bounced back to the storage area 222 by the overhang 218.
  • the second wash water S2 is caused to go out of course in the falling direction due to the height difference in the shelf slope 220a.
  • a part of the first wash water S1 may join the second wash water S2 after passing through the shelf slope 220b.
  • the second wash water S2 is slowed down, so that the second wash is performed after the lap in the first wash water S1. It is desirable that the ratio of merging with water S2 is less than 20%, preferably less than 10%.
  • a concave portion is formed in order to mount a functional portion at the rear end portion of the flush toilet 200, and a step surface such as a first upper surface 210 and a second upper surface 212 is provided for this purpose.
  • the invention is not limited to the concave portion, and can be applied to the design in the case where the water guide shelf 208 is formed corresponding to the step on the upper surface.
  • the shelf width of the water guide shelf 208 need not be constant, and may vary depending on the location.
  • the water guide shelf 208 does not need to be horizontal, and may be inclined or curved with respect to a horizontal plane.
  • the water guide shelf 208 does not need to go around the entire circumference of the toilet bowl 206 one by one, and may have a partial discontinuous region (such as a lack).
  • a flush toilet in an aspect of the present invention is formed in a circumferential direction on a main body part in which a toilet bowl part is formed and an inner wall surface of the toilet bowl part, and a first shelf part at a high position and a second shelf part at a low position.
  • a first water outlet formed to discharge water to the first shelf, a second water outlet formed to discharge water to the second shelf, and formed at a position lower than the first water outlet.
  • the first shelf and the second shelf may be connected by a smooth shelf slope. By connecting the first shelf and the second shelf with a smooth shelf slope, the wash water can be guided in the falling direction by the difference in the height of the shelf slope while maintaining the water flow of the wash water.
  • An overhang portion may be formed on the upper surface of the toilet bowl at a point where at least the washing water that has passed through the second shelf rises up the shelf slope and enters the first shelf.
  • a storage area for storing wash water may be formed at the bottom of the toilet bowl.
  • the main stream of water discharged from the second water outlet may fall into the storage area without joining the water discharged from the first water outlet in the first shelf. It becomes easy to strengthen discharge power by dropping the main stream of the water discharged from the second water outlet before joining the water discharged from the first water outlet.
  • the amount of water that rises on the shelf slope and joins the water discharged from the first water outlet may be less than 20% of the total water amount.
  • the shelf slope where water discharged from the second water outlet rises may have an inclined surface of 10 degrees or more.
  • the water guide shelf may be formed in an annular shape over the entire circumference of the toilet bowl portion by connecting the first shelf portion and the second shelf portion by two shelf slopes. Both of these two shelf slopes may be formed on the rear half portion side of the toilet bowl in plan view.
  • the first shelf may be longer than the second shelf. By shortening the second shelf, it becomes easy to climb the wash water powerfully while maintaining the kinetic energy of the wash water at the second water outlet. The main stream of the wash water at the second water outlet falls, but the wash water that has escaped the water merges with the wash water at the first water outlet.
  • the shelf slope where the wash water that has passed through the second shelf rises toward the first shelf may be formed on the side of the storage area formed at the bottom of the toilet bowl in plan view.
  • the flush toilet bowl has a toilet bowl portion, a main body portion having a first upper surface at a high position and a second upper surface at a low position, and an inner wall surface of the toilet bowl portion.
  • a water guide shelf formed in the direction and a water outlet formed to discharge water to the water guide shelf are provided.
  • the water guide shelf has a first shelf formed at a position corresponding to the first upper surface and a second shelf formed at a position corresponding to the second upper surface.
  • the second shelf is formed at a lower position than the first shelf.
  • the water guide shelf is also provided with a height difference, and the water flow can be controlled by the height difference of the water guide shelf.
  • the second shelf may be connected to the first shelf by a smooth shelf slope. By smoothly connecting the first shelf and the second shelf, it is easy to maintain the water flow of the cleaning water.
  • the first upper surface and the second upper surface may be connected by a smooth upper surface slope. And at least in the section from the boundary point of the second shelf part and the shelf slope to the central point of the shelf slope, the shelf slope may be a slope substantially parallel to the top slope. By making the shelf slope parallel to the top slope, it becomes easier to maintain harmony in the overall design.
  • An overhang portion that protrudes inward may be further formed on the upper surface slope of the toilet bowl portion.
  • the shelf slope may be a slope substantially parallel to the overhang portion.
  • a first water outlet and a second water outlet may be formed in the toilet bowl portion.
  • the first water outlet may be formed to discharge water to the first shelf
  • the second water outlet may be formed to discharge water to the second shelf.
  • a first water outlet and a second water outlet may be formed at the upper end of the inner wall of the toilet bowl.
  • the first water outlet may be formed on the first shelf
  • the second water outlet may be formed on the second shelf.
  • the interval between the water guide shelf and the upper surface may be increased.
  • a first water outlet and a second water outlet may be formed at the upper end of the inner wall of the toilet bowl.
  • a 1st spout may be formed in a 1st shelf part
  • a 2nd spout may be formed in a 2nd shelf part.
  • the water guide shelf may be formed in an annular shape over the entire circumference of the toilet bowl portion, and may be formed substantially parallel to the overhang portion in at least 80% or more of the entire circumference.
  • the average interval between the first shelf and the first upper surface may be larger than the average interval between the second shelf and the second upper surface.
  • the distance between the water guide shelf and the upper surface may be increased.
  • a recess may be formed at the rear end of the upper surface of the toilet bowl.
  • the second top surface may correspond to the bottom surface of the recess.
  • the present invention can be used for flush toilets.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Sanitary Device For Flush Toilet (AREA)
PCT/JP2016/070690 2015-09-01 2016-07-13 水洗式便器 WO2017038258A1 (ja)

Priority Applications (2)

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CN201680049178.2A CN107923173B (zh) 2015-09-01 2016-07-13 抽水式马桶
EP16841290.6A EP3346065B1 (de) 2015-09-01 2016-07-13 Spültoilette

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JP7151685B2 (ja) * 2019-09-30 2022-10-12 Toto株式会社 水洗大便器

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JP2010196375A (ja) * 2009-02-25 2010-09-09 Toto Ltd 水洗大便器
JP2015017501A (ja) * 2014-10-27 2015-01-29 株式会社Lixil 水洗式便器
JP2015068164A (ja) * 2014-05-28 2015-04-13 Toto株式会社 水洗大便器
JP2015068070A (ja) * 2013-09-30 2015-04-13 Toto株式会社 水洗大便器装置
JP2015074876A (ja) * 2013-10-04 2015-04-20 株式会社Lixil 汚物排出装置

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EP2261428B1 (de) * 2008-02-29 2022-08-17 Toto Ltd. Toilettenvorrichtung
EP2562314B1 (de) * 2011-08-24 2022-05-11 Toto Ltd. Spültoilette
CN102605840A (zh) * 2012-03-12 2012-07-25 虞吉伟 坐圈封闭式全洗喷射坐便器
JP6194570B2 (ja) * 2012-09-24 2017-09-13 Toto株式会社 水洗大便器

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JP2010196375A (ja) * 2009-02-25 2010-09-09 Toto Ltd 水洗大便器
JP2015068070A (ja) * 2013-09-30 2015-04-13 Toto株式会社 水洗大便器装置
JP2015074876A (ja) * 2013-10-04 2015-04-20 株式会社Lixil 汚物排出装置
JP2015068164A (ja) * 2014-05-28 2015-04-13 Toto株式会社 水洗大便器
JP2015017501A (ja) * 2014-10-27 2015-01-29 株式会社Lixil 水洗式便器

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EP3346065A1 (de) 2018-07-11
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CN107923173A (zh) 2018-04-17
CN107923173B (zh) 2020-02-21

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