WO2011093440A1 - Canal de drainage de toilette à chasse d'eau - Google Patents

Canal de drainage de toilette à chasse d'eau Download PDF

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Publication number
WO2011093440A1
WO2011093440A1 PCT/JP2011/051736 JP2011051736W WO2011093440A1 WO 2011093440 A1 WO2011093440 A1 WO 2011093440A1 JP 2011051736 W JP2011051736 W JP 2011051736W WO 2011093440 A1 WO2011093440 A1 WO 2011093440A1
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WO
WIPO (PCT)
Prior art keywords
drainage
flow passage
channel
rising
washing water
Prior art date
Application number
PCT/JP2011/051736
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English (en)
Japanese (ja)
Inventor
昭範 神谷
晃弘 山田
豪介 榊原
嵩正 伊奈
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 JP2010279723A external-priority patent/JP5715404B2/ja
Priority claimed from JP2010279720A external-priority patent/JP5715402B2/ja
Priority claimed from JP2010279722A external-priority patent/JP5715403B2/ja
Priority claimed from JP2010294318A external-priority patent/JP5826485B2/ja
Application filed by 株式会社Lixil filed Critical 株式会社Lixil
Priority to US13/574,479 priority Critical patent/US20120284911A1/en
Publication of WO2011093440A1 publication Critical patent/WO2011093440A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D11/00—Other 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
    • E03D11/02—Water-closet bowls ; Bowls with a double odour seal optionally with provisions for a good siphonic action; siphons as part of the bowl
    • E03D11/08—Bowls with means producing a flushing water swirl
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
    • E03D2201/00—Details and methods of use for water closets and urinals not otherwise provided for
    • E03D2201/40—Devices for distribution of flush water inside the bowl

Definitions

  • the present invention relates to a drain of a flush toilet.
  • Patent Document 1 discloses a conventional flush toilet drainage channel.
  • the drainage channel of the flush toilet bowl is in communication with the downstream side of the toilet bowl, and includes an ascending flow path rising toward the downstream side, and a descending flow path communicating with the rising flow path and descending toward the downstream side.
  • the ascending flow path has a horizontal surface whose top located on the downstream side extends in a direction perpendicular to the drainage direction of the washing water.
  • the rising flow channel is formed such that the width of the portion where the top is formed is the same as or wider than the rising flow channel. For this reason, the drainage channel of the flush toilet can increase the amount of flush water that gets over the top by rising water level.
  • the drainage channel of the flush toilet bowl is provided with a shelf portion having an inclined surface facing upward and inward at the boundary between the top portion located on the downstream side of the lower surface of the rising flow channel and the falling flow channel.
  • Patent Document 2 discloses another conventional flush toilet drainage channel.
  • the drainage channel of the flush toilet bowl is in communication with the downstream side of the toilet bowl, and includes an ascending flow path rising toward the downstream side, and a descending flow path communicating with the rising flow path and descending toward the downstream side. Have.
  • the upstream end of the rising channel is formed to the smallest channel area in the drainage channel.
  • the ascending flow passage is formed such that the flow passage area is gradually increased toward the downstream side. For this reason, when a large amount of filth or the like is introduced into the toilet bowl, it is possible to prevent the filth or the like from being clogged at the upstream end of the ascent flow passage and clogging the filth or the like in the ascent flow passage.
  • the washing water may not reach the back of the inner circumferential surface of the descending flow passage facing the shelf. In this case, a water film is not formed in the descending flow passage, and a siphon action can not be generated in the drainage passage, so the toilet flushing of the flush toilet bowl becomes insufficient.
  • the flow passage area at the upstream end of the rising flow channel is small, and therefore the washing water can not flow fast and smoothly.
  • the flow area of the rising flow path gradually increases toward the downstream side, turbulent flow is likely to occur, resistance is generated, and it is difficult to smoothly flow dirt and the like into the drainage path.
  • the flow passage area at the upstream end of the rising flow passage is narrow, there is a possibility that dirt or the like may be clogged at the upstream end of the rising flow passage.
  • the present invention is made in view of the above-mentioned conventional situation, and it is an object of the present invention to provide a drainage path of a flush type toilet which can perform toilet bowl cleaning favorably.
  • the drainage channel of the flush toilet bowl according to the first aspect of the present invention is a drainage channel of the flush toilet bowl which is in communication with the downstream side of the toilet bowl and has a rising channel rising upward.
  • the ascending flow path is characterized in that the lower side surface is formed so as to gradually spread toward the top located on the downstream side.
  • the inventors of the present invention in the drainage channel of the flush toilet bowl, in the vicinity of the lower surface of the ascending flow channel due to the drainage direction of the washing water changing from downward to upward at the upstream end of the ascending channel.
  • the flow velocity of the wash water is low on the upstream side and the wash water is easy to collect on the upstream side, and the flow velocity of the wash water is faster on the downstream side than on the upstream side, and near the upper end of the rising flow path It was found that the flow rate of water was high, but the flow rate of wash water downstream thereof was slow and wash water was easy to stagnate.
  • the flow passage area of the region where the flow velocity of the washing water is high is expanded by gradually spreading the lower surface of the rising flow channel toward the top located at the downstream end; A large flow of flush water was allowed to flow through the upflow channel.
  • the waste and the like are transported to the region where the flow passage area of the rising flow passage is increased by riding on the washing water having a high flow velocity, and therefore, the rising flow passage can be favorably transported.
  • the drainage channel of the flush toilet according to the first aspect of the present invention can perform toilet flushing properly.
  • the top portion may have a substantially horizontal surface extending in a direction perpendicular to the drainage direction of the washing water.
  • a large flow of washing water flowing to the downstream end of the rising flow channel can be made to flow down to the downstream of the top at a stretch. Therefore, the water film can be reliably formed in the water film forming region by the throttling portion and the like formed downstream of the rising flow passage, and the siphon action can be reliably generated in the drainage passage. Since the washing water flows more vigorously in the drainage channel due to the occurrence of the siphon action, the dirt and the like is carried to the region where the flow passage area of the rising flow passage is enlarged, riding on the washing water of the high flow velocity, and the rising flow passage Can be transported well.
  • the upward flow passage is formed such that the flow passage area above the middle in the vertical direction from the upstream end to the middle is larger than the flow passage area on the lower side
  • the flow passage area lower than the middle in the vertical direction from the middle portion to the vicinity on the upstream side of the top portion can be formed larger than the flow passage area on the upper side.
  • the upward flow channel may have a lower surface having a substantially flat surface extending in a direction of drainage of the washing water and a direction perpendicular to the direction of drainage.
  • a large flow of washing water can be flowed in the region where the flow velocity is high.
  • the lower surface can be continuously formed on the top portion having the substantially horizontal surface extending in the direction perpendicular to the drainage direction of the cleaning water, the cleaning water can flow smoothly in the ascending flow path. For this reason, the conveyance of the filth, etc. in the ascending flow path can be carried out favorably.
  • the upward flow path can expand the maximum length in the vertical direction from the upstream end toward the downstream side in a cross-sectional shape perpendicular to the drainage direction of the washing water.
  • the ascending flow passage can increase the length in the vertical direction in the cross-sectional shape on the downstream side of the rising passage. For this reason, when dirt etc. pass through the top part of the downstream end of the rising flow path, it can be prevented that the dirt etc. is caught on the upper side of the rising flow path. Therefore, the waste and the like do not stay in the drainage channel, and the waste and the like can be transported satisfactorily.
  • a flow path can be provided.
  • the shelf projecting inward is formed along the inner peripheral surface of the descending flow passage, the wash water having passed over the top flows along the shelf and sends the washing water to the rear of the downward flow passage be able to.
  • the washing water which has fallen from the shelf collides with the throttling portion formed below the shelf and is scattered to form a water film in the water film forming region. Therefore, the siphon action can be generated early in the drainage channel. That is, even with a small amount of washing water, the siphon action can be generated at an early stage, and filth and the like can be transported well.
  • the drainage channel of the flush toilet bowl according to the second aspect of the present invention is a drainage channel of the flush toilet bowl which is in communication with the downstream side of the toilet bowl and has a rising channel rising upward.
  • the upward flow path has a maximum length in the vertical direction that increases from the upstream end toward the downstream side, and the inner surface shape of the upstream end is greater than the vertical dimension Are also characterized by large lateral dimensions.
  • the drainage channel of this flush type toilet reduces the slow portion of the flow velocity on the lower side of the rising channel by reducing the vertical dimension of the inner surface shape of the upstream end of the rising channel, and the upstream end of the rising channel By increasing the lateral dimension of the part, the flow rate on the upper side with high flow velocity is increased. As a result, the flow velocity of the cleaning water at the upstream end of the rising flow passage can be increased, and dirt and the like can be favorably flowed into the drainage passage, and smooth discharge can be performed.
  • the upward flow path has a cross-sectional shape perpendicular to the drainage direction of the cleaning water, the maximum length in the vertical direction increases from the upstream end toward the downstream side, so dirt in the upward flow path It is possible to prevent clogging etc.
  • the drainage channel of the flush toilet according to the second aspect of the present invention can perform toilet flushing properly.
  • the upward flow passage may be formed in a mountain shape in which the upper side surface gradually widens from the central portion downward in the cross-sectional shape perpendicular to the drainage direction of the washing water.
  • the flow passage area of that region is made small to increase the flow velocity of the washing water Can be prevented. For this reason, the washing water in the rising flow path can be flowed favorably, and the conveyance of the waste etc. can be carried out favorably.
  • the ascending flow passage has rising surfaces rising from the left and right ends of the lower surface in a cross-sectional shape perpendicular to the drainage direction of the washing water, and the height of the rising surface is on the upstream side of the apex located downstream It may be greatest in the vicinity.
  • the height of the rising surface is maximized in the vicinity of the upstream side of the top of the rising flow passage, the flow passage area of this portion is expanded and the flow of cleaning water becomes smooth. For this reason, it is possible to prevent the clogging of the filth and the like in the vicinity of the upstream side of the top of the rising flow passage.
  • the upward flow path may be formed as an inclined surface which extends upward from the central portion in the right and left direction and is expanded inward in a cross-sectional shape perpendicular to the drainage direction of the washing water.
  • the region where the washing water tends to stagnate inward in the vicinity of the upper side surface of the rising flow channel to be an inclined surface that is swollen inward, the flow velocity of the washing water in that region is increased to prevent the washing water stagnation. it can.
  • the washing water can flow favorably in the rising flow passage, and the transport of the dirt and the like in the rising flow passage can be favorably performed.
  • the rising flow channel forms a corner with a lower surface and a rising surface rising from the left and right ends of the lower surface as a rounded surface, and the other corner
  • the curvature of the are surface can be increased.
  • a swirling flow due to the swirling flow formed in the toilet bowl flows in.
  • the corner portion where the curvature of the rounded surface is small washing water flows smoothly along the corner portion.
  • the swirling flow flows in the downstream direction of the rising flow path by colliding with the rising surface connected at the corner portion where the curvature of the rounded surface is large.
  • the drainage channel of this flush type toilet can carry out favorable conveyance of the filth etc.
  • the drainage channel of the flush toilet bowl according to the third aspect of the present invention is provided with a descending channel which is in communication with the downstream side of the toilet bowl and in communication with the downstream side of the ascending channel which rises toward the downstream side and which descends toward the downstream side.
  • the downward flow passage is characterized in that it has a shelf portion formed to protrude inward along the inner circumferential surface.
  • a shelf projecting to the inside along the inner circumferential surface of the descending flow channel is formed, so that the washing water flows along the shelf and the washing water to the rear of the descending flow channel Can send.
  • the washing water which has fallen from the shelf collides with the throttling portion formed below the shelf and is scattered to form a water film in the water film generation area. Therefore, the siphon action can be generated early in the drainage channel. That is, even with a small amount of washing water, the siphon action can be generated at an early stage, and filth and the like can be transported well.
  • the drainage channel of the flush toilet according to the third aspect of the present invention can perform toilet flushing properly.
  • the shelf may be lowered rearward along the inner circumferential surface of the downward flow passage.
  • the washing water can be circulated along the inner circumferential surface of the descending flow path to the rear of the descending flow path. Therefore, even with a small amount of washing water, the washing water flows down from the inner periphery of the descending flow path, and the water film can be formed reliably. In other words, the siphon action can be generated early with a small amount of washing water, and the filth and the like can be transported favorably.
  • the shelf may be an inclined surface facing inward and upward. In this case, although the flow passage area of the descending flow passage is reduced by the shelf portion, the change can be made gentle. For this reason, it is possible to prevent the clogging of the filth and the like due to the shelf portion, and the filth and the like can be transported favorably.
  • the shelf may extend to a central portion of the rear side of the descending channel.
  • the washing water can be reliably turned along the inner circumferential surface of the descending flow passage to the central portion of the rear side surface of the descending flow passage.
  • a water film can be formed in the downward flow path with a small amount of washing water.
  • a water film is formed so as to expand from the lower end of the rear side of the descending channel, and siphons are formed in the drainage channel. An action occurs.
  • the washing water circulates to the central part of the rear side surface of the descending flow path, the water film can be reliably formed and the siphon action can be generated in the drainage path, and the transport of the dirt etc. is favorably performed.
  • FIG. 2 is a cross-sectional view of a flush toilet of Example 1;
  • FIG. 2 is a plan view of a flush toilet of Example 1;
  • FIG. 2 is a sectional view taken along the line AA of FIG.
  • FIG. 2 is a cross-sectional view taken along line B-B in FIG.
  • FIG. 2 is a cross-sectional view taken along the line CC in FIG. (A) It is sectional drawing of the rising flow path of Example 1.
  • FIG. FIG. 6 (B) is a cross-sectional view taken along arrows D-D to H-H in FIG. 6 (A).
  • (C) It is an arrow II sectional view of FIG. 6 (A). It is arrow JJ sectional drawing of FIG. FIG.
  • FIG. 2 is a cross-sectional view taken along arrow K-K in FIG.
  • FIG. 2 is a cross-sectional view taken along line L-L of FIG.
  • FIG. 2 is a cross-sectional view taken along the line PP in FIG. It is arrow QQ sectional drawing of FIG.
  • FIG. 2 is a cross-sectional view taken along line RR of FIG. 1; It is sectional drawing seen from the other side of arrow RR of FIG.
  • FIG. 7 is a cross-sectional view of a flush toilet of Example 2;
  • FIG. 15 is a cross-sectional view taken along the line WW in FIG.
  • FIG. 15 is a cross-sectional view taken along the line XX in FIG.
  • FIG. 15 is a sectional view taken along line YY in FIG.
  • FIG. 15 is a cross-sectional view taken along the line Z-Z in FIG. It is a fragmentary sectional view showing the descent channel of other examples. It is a fragmentary sectional view showing the descent channel of other examples.
  • FIG. 10 is a cross-sectional view of a flush toilet of Example 3; It is a top view of the flush toilet bowl of Example 3.
  • FIG. 22 is a cross-sectional view along the line AA in FIG.
  • FIG. 22 is a cross-sectional view of FIG. 21 taken along the line BB.
  • FIG. 22 is a cross-sectional view along the line CC in FIG. 21.
  • FIG. 22 is a cross-sectional view taken along the line DD in FIG.
  • FIG. 22 is a cross-sectional view of FIG.
  • FIG. 22 is an enlarged cross-sectional view of FIG. 21 taken along the line E-E.
  • FIG. 22 is an enlarged cross-sectional view of FIG. 21 taken along the line FF.
  • FIG. 22 is an enlarged view of an arrow GG cross section of FIG. 21.
  • FIG. 22 is an enlarged view of a cross section taken along line II of FIG. 21.
  • FIG. 22 is an enlarged view of a section JJ in FIG. 21;
  • FIG. 22 is an enlarged view of a cross section K-K in FIG.
  • FIG. 16 is an enlarged cross-sectional view showing a rising flow path of the flush toilet bowl of Example 4;
  • FIG. 34 is a cross-sectional view taken along the line LL in FIG.
  • FIG. 34 is a cross-sectional view taken along the line MM in FIG.
  • FIG. 34 is a cross-sectional view taken along line NN in FIG.
  • FIG. 34 is a cross-sectional view taken along the line OO in FIG.
  • the flush type toilet bowl includes the toilet body 1, the tank body 2 placed on the upper surface of the rear of the toilet body 1, and the flush water stored in the tank body 2. It has a distribution pipe 3 for discharging water, and a connection pipe 4 communicating the discharge port 40A of the toilet body 1 with the inlet of a drainage pipe (not shown) opened on the floor surface of the toilet room where the toilet body 1 is installed.
  • the connection piping 4 forms the throttling portion 5 where the cleaning water flowing down from the drainage port 40A collides immediately below the discharge port 40A and scatters.
  • a water film is formed in the water film formation region S by the washing water colliding with the throttling portion 5 and scattering. Thereby, a siphon action can be generated in the drainage channel.
  • the toilet body 1 includes a toilet bowl 10, an introduction passage 20, an ascending flow passage 30, and a descending flow passage 40.
  • the introduction passage 20, the upward flow passage 30, the downward flow passage 40, and the connection pipe 4 constitute a drainage passage of the flush toilet.
  • the bowl 10 forms a rim water passage 11 at the upper inner peripheral edge.
  • the distribution pipe 3 has an inlet 3A connected to the outlet of the tank body 2, and a first discharge pipe 3B and a second discharge pipe 3C branched below the inlet 3A.
  • the flush water stored in the tank body 2 is discharged from the first discharge pipe 3B along the rim water passage 11 and is discharged from the second discharge pipe 3C toward the rear of the toilet bowl 10.
  • the flush water spouted from the first discharge pipe 3B along the rim water passage 11 flows onto the rim water passage 11 and then falls to the inner surface of the bowl 10.
  • the introduction passage 20 is continuous with the lower end portion of the toilet bowl 10 and formed in a tubular shape, as shown in FIGS. 1 and 3 to 5.
  • the introduction passage 20 is inclined downward from the lower end of the toilet bowl 10 to the rear of the toilet body 1. That is, the introduction passage 20 is inclined downward toward the upstream end 31 of the rising flow passage 30.
  • the downstream end of the introduction passage 20 and the upstream end 31 of the rising flow passage 30 are continuously formed.
  • the introduction passage 20 is formed in an R-shaped surface having a gentle curvature, which is smaller in curvature in the lower left corner portions 20L and 31L than in the lower right corner portions 20R and 31R, in a cross-sectional shape perpendicular to the drainage direction of washing water. It is done.
  • the right side surface 31C rises in a straight line.
  • the washing water forms a swirling flow FL that flows counterclockwise in the toilet bowl 10 and flows into the introduction passage 20.
  • lower left corner parts 20L and 31L are R surfaces of a moderate curve, washing water flows in into introductory way 20 smoothly.
  • the washing water which has flowed into the introduction passage 20 collides with the right side surface 31C which linearly rises from the lower right corner portions 20R and 31R of the curved R surface having a large curvature, and flows in the downstream direction of the drainage channel.
  • the introduction passage 20 can change the flow of wash water swirling in the toilet 10 into a flow in the downstream direction of the drainage path, and accelerate and rectify the flow in the downstream direction. .
  • the downstream end of the introduction passage 20, which is the upstream end 31 of the upward flow passage 30, has a substantially rectangular cross-sectional shape as shown in FIG.
  • a flush water having a high flow velocity flows on the upper side surface 31T due to the change of the flush direction of the flush water from the lower direction to the upper direction bordering on the upstream end portion 31 of the rising flow passage 30.
  • the cross-sectional shape of the drainage channel in the vicinity of the upstream end 31 of the upward flow channel 30 if the vertical dimension is increased, the flow velocity of the washing water on the lower side 31B side becomes slow, and the rectified washing near the lower side 31B side There is a risk that the water will stagnate.
  • the dimension in the vertical direction is reduced to prevent the rectified washing water from being collected, and the dimension in the lateral direction is secured to secure the flow rate. It is formed large.
  • the upstream end portion 31 of the rising flow passage 30 is formed in a substantially rectangular shape whose cross-sectional shape is horizontally long.
  • the flow passage area A1 above the center M in the vertical direction is formed larger than the flow passage area B1 on the lower side.
  • the flow passage area A1 on the upper side which is a region where the flow velocity of the washing water is high, can be increased, and a large amount of washing water can flow in the rising flow passage 30, and the upstream end 31 of the rising flow passage 30
  • the flow rate of the washing water near the side surface 31B can be increased, and the stagnation of the rectified washing water can be reduced.
  • the right side surface 31C which linearly rises from the lower right corner portions 20R and 31R of the R-surface having a large curvature and having a large curvature, flows the washing water in the introduction channel 20 in the downstream direction of the drainage channel. Optimization can be achieved by accelerating the flow in the downstream direction.
  • the ascending flow passage 30 is elevated from the upstream end 31 toward the rear (downstream side) of the toilet body 1.
  • the upward flow channel 30 is formed by the lower side surface 33, left and right side surfaces 34L, 34R rising from the left and right ends of the lower side surface 33, and left and right side surfaces 34L, 34R. It is surrounded and formed by the upper side surface 35 which connects the upper end of.
  • the upward flow path 30 has a maximum length in the vertical direction from the upstream end 31 to the downstream side in the cross-sectional shape in the direction perpendicular to the drainage direction of the washing water (from the upstream end 31 in FIG. In the direction of the arrows D-D).
  • the rising flow passage 30 can increase the length in the vertical direction in the cross-sectional shape on the downstream side of the rising flow passage 30. For this reason, when a waste etc. pass the top 32 of the downstream end of the rising flow path 30, it is possible to prevent the waste etc. from being caught on the upper side surface 35 of the rising flow path 31. Therefore, the waste and the like do not stay in the drainage channel, and the waste and the like can be transported satisfactorily.
  • the ascending flow path 30 is formed by gradually spreading the lower side surface 33 toward the top 32 located downstream. Further, the lower side surface 33 is formed in the rising flow passage 30 as a flat surface extending in a direction perpendicular to the drainage direction and the drainage direction of the washing water. Further, the top 32 of the lower side surface 33 has a substantially horizontal surface extending in a direction perpendicular to the direction of drainage of the washing water.
  • the flow velocity of the washing water is higher on the downstream side than on the upstream side. Therefore, by gradually spreading the lower side surface 30 of the rising flow passage 30 toward the top 32 located at the downstream end, the flow passage area of the region where the flow velocity of the washing water is fast is expanded and the washing water with a large flow rate rises.
  • the flow path 30 is made to flow. Further, since the lower side surface 33 is continuously formed on the top portion 32, the cleaning water in the rising flow passage 30 can flow smoothly. For this reason, the conveyance of the filth, etc. in the ascending flow path 30 can be carried out favorably.
  • the top portion 32 has a substantially horizontal surface extending in a direction perpendicular to the drainage direction of the washing water, a large flow of washing water flowing to the downstream end of the rising flow passage 30 It can flow down to the down flow path 40.
  • the washing water flowing down the downflow passage 40 collides with the throttling portion 5 of the connection pipe 4 and scatters, thereby forming a water film in the water film formation region S and reliably generating a siphon action in the drainage passage be able to.
  • the occurrence of the siphon action causes the washing water to flow more vigorously in the drainage channel, so that the dirt and the like rides on the washing water of the high flow velocity and is transported to the area where the flow passage area of the rising flow passage 30 is expanded.
  • the path 30 can be transported well.
  • the drainage channel of the flush toilet according to the first embodiment can perform toilet flushing properly.
  • the upper side surface 31T of the upstream end portion 31 is formed in a curved surface that bulges upward.
  • the upper side surface 35 is formed in a mountain shape whose width is gradually increased from the central portion to the left and right downwards.
  • the upper side surface 35 extends from the central portion to the lower left and right, and is inclined to an inclined surface which bulges inward.
  • the cleaning water is likely to stagnate in the vicinity of the upper side surface 35 because it is immediately after the flow direction of the cleaning water changes from the lower side to the upper side.
  • the upper side surface 35 of the easily stagnant region into an inclined surface which bulges inward, it is possible to further increase the flow velocity of the washing water and to prevent the stagnation of the rectified washing water.
  • the washing water in the rising flow passage 30 can flow favorably, and the transport of the dirt and the like in the rising flow passage 30 can be carried out favorably.
  • the upward flow passage 30 has a flow passage area lower than the flow passage area A1 above the center M in the vertical direction in the cross-sectional shape perpendicular to the drainage direction of washing water. It is formed larger than B1. That is, at the upstream end portion 31 of the rising flow passage 30, the flow velocity of the wash water in the vicinity near the upper side surface 31T is high, so the flow passage area A1 on the upper side is increased to flow the wash water with a large flow rate. The flow rate of the washing water in the vicinity of the upper side surface 35 becomes slower as the rising flow passage 30 progresses to the downstream side than the upstream end portion 31.
  • the flow passage area above the center M in the vertical direction in the cross-sectional shape perpendicular to the drainage direction of the wash water is gradually reduced, and the flow passage area on the lower side is gradually increased accordingly.
  • the flow passage area on the upper side is formed larger than the flow passage area on the lower side.
  • the middle portion 30M to the downstream end as shown in FIG. 6B and FIG. 7, in the cross-sectional shape perpendicular to the drainage direction of the washing water, the flow passage area below the center M in the vertical direction B2 is formed larger than the upper flow passage area A2.
  • the flow passage area on the upper side which is a region where the flow velocity of washing water is high
  • the middle portion 30M to the downstream end of the rising flow passage 30 Since the lower flow passage area which is a region where the flow velocity of the washing water is high is enlarged, the stagnation of the rectified washing water of the rising flow passage 30 is reduced and the entire region in the rising flow passage 30 is reduced. Can flow a large flow of cleaning water. For this reason, the conveyance of the filth, etc. in the ascending flow path can be carried out favorably.
  • the downward flow passage 40 is continuously formed on the downstream side of the upward flow passage 30 as shown in FIGS. 1 and 8 to 13.
  • the downward flow passage 40 extends vertically downward. That is, the descending flow passage 40 descends toward the downstream side.
  • the downward flow path 40 forms an exhaust port 40A at the lower end.
  • the discharge port 40A can be inserted into the connection port on the upstream side of the connection pipe 4 and can communicate with the inflow port of the drain pipe opened to the floor surface of the toilet room through the connection pipe 4.
  • the downward flow passage 40 extends from the top portion 32 of the upward flow passage 30, and is formed so as to protrude inward along the inner circumferential surface of the downward flow passage 40, and has a shelf 41 formed of an inclined surface facing upward and inward. ing. Since the shelf 41 protrudes inward along the inner circumferential surface of the descending flow passage 40, the wash water which has passed over the top 32 flows along the shelf 41 and sends the washing water to the rear of the downward flow passage 40. Can. The washing water which has fallen from the shelf 41 into the descending flow passage 40 collides with the throttling portion 5 formed in the connection pipe 4 and scatters. As a result, a water film is formed in the water film formation region S, and the siphon action can be generated early in the drainage channel. That is, even with a small amount of washing water, the siphon action can be generated at an early stage, and filth and the like can be transported well.
  • the drainage channel of the flush toilet according to the first embodiment can perform toilet flushing properly.
  • the shelf 41 is formed by an inclined surface facing the upper inside, the flow passage area of the descending flow passage 40 is reduced by the shelf 41, but the change can be made gentle. For this reason, it is possible to prevent clogging of the filth and the like by the shelf portion 41, and the filth and the like can be transported favorably.
  • the shelf portion 41 descends rearward from the top portion 32 of the ascending flow path 30 along the inner circumferential surface of the descending flow path 40. Therefore, even if the amount of wash water flowing from the top 32 to the shelf 41 is small, the wash water can be sent along the inner peripheral surface of the downward flow passage 40 to the rear of the downward flow passage 40. That is, even if the amount of washing water is small, the washing water flows from the periphery of the descending flow path 40, and the water film can be reliably formed in the water film formation region S. Therefore, the siphon action can be generated early with a small amount of washing water, and the filth and the like can be transported favorably.
  • the shelf portion 41 gradually narrows in width rearward along the inner peripheral surface of the descending flow passage 40.
  • the shelf portion 41 has a siphon action in the drainage channel, and becomes a resistance when dirt and the like flow with the flush water in the descending flow passage 40. Therefore, by gradually narrowing the width of the shelf 41 rearward, it is possible to generate the siphon action at an early stage, reduce the resistance of the flow of washing water etc., and make the conveyance of the soil etc. favorable. It can be carried out.
  • the flush toilet according to the second embodiment communicates with the downstream end of the downward flow passage 140 of the toilet drainage channel and has a transversely extending flow passage 146 extending laterally to the rear of the toilet body 101. doing.
  • the flush toilet bowl also has a reinforcing wall 150 extending vertically in the central portion of the outer peripheral surface of the rear side surface 144 of the downward flow passage 140 to reinforce the rear of the toilet body 101.
  • the other configuration is the same as that of the first embodiment, and the same reference numeral is assigned to the same configuration and the detailed description is omitted.
  • the cross draw channel 146 is continuously formed at the downstream end of the downward flow channel 140.
  • An exhaust port 140A provided at the downstream end of the cross draw flow path 146 is opened toward the rear of the toilet body 101.
  • the discharge port 140A can be inserted into the connection port on the upstream side of the connection member 5, and can communicate with the inflow port of the drain pipe drawn from the wall surface of the toilet room via the connection member 5.
  • the downward flow passage 140 has a front side surface 142 extending downward from the top 32 of the upward flow passage 30, left and right side surfaces 143L and 143R extending rearward from left and right ends of the front side surface 142, and left and right side surfaces 143L. , 143R is formed to be surrounded by the rear side surface 144 connecting the rear ends.
  • the downward flow passage 140 is integrally formed with the toilet bowl 10, the introduction passage 20, the upward flow passage 30, and the like, and constitutes the toilet bowl main body 101.
  • the toilet bowl body 101 is made of pottery and is manufactured by a slip casting method.
  • a recess 144A is formed on the inner peripheral surface or the like of the portion where the reinforcing wall 150 extends from the outer peripheral surface of the rear side surface 144 due to drying of the slurry and contraction of the toilet body 101 in the manufacturing process.
  • the downward flow passage 140 extends from the top 32 of the upward flow passage 30, and is formed so as to protrude inward along the inner circumferential surface of the downward flow passage 140, as shown in FIGS. It has the shelf part 141 which consists of an inclined surface. Since the shelf portion 141 protrudes inward along the inner circumferential surface of the descending flow passage 140, the wash water having passed over the top 32 flows along the shelf portion 141 and sends the washing water to the rear of the downward flow passage 140. Can.
  • a water film is formed in the water film forming region S which is a boundary surface between the descending flow passage 140 and the horizontal drawing passage 146 by the washing water which has flowed down from the shelf portion 141 into the downward flow passage 140.
  • the drainage channel of the flush toilet according to the second embodiment can also perform toilet flushing properly.
  • the shelf portion 141 is formed by an inclined surface facing the upper inside, the flow passage area of the downward flow passage 140 is reduced by the shelf portion 141, but the change can be made gentle. For this reason, clogging of the filth and the like by the shelf portion 141 can be prevented, and the filth and the like can be transported satisfactorily.
  • the shelf portion 141 descends rearward from the top portion 32 of the ascending flow path 30 along the inner circumferential surface of the descending flow path 140. For this reason, even if there is little washing water flowing from the top 32 to the shelf 141, washing water can be sent along the inner circumferential surface of the downward flow passage 140 to the rear of the downward flow passage 140. That is, even if the amount of washing water is small, the washing water flows from the periphery of the descending flow path 140, and the water film can be reliably formed in the water film formation region S. Therefore, the siphon action can be generated early with a small amount of washing water, and the filth and the like can be transported favorably.
  • the shelf portion 141 gradually narrows in width rearward along the inner circumferential surface of the descending flow passage 140.
  • the shelf portion 141 has a siphon action in the drainage channel, and becomes a resistance when dirt and the like flow with the washing water in the descending flow passage 140. Therefore, by gradually narrowing the width of the shelf 141 rearward, it is possible to generate the siphon action at an early stage, reduce the resistance of the flow of washing water etc., and make the conveyance of the soil etc. favorable. It can be carried out.
  • the shelf portion 141 extends to the central portion of the rear side surface 144 of the descending flow passage 140. For this reason, washing water can be reliably sent to the central portion of the rear side surface 144 of the downward flow passage 140 along the inner circumferential surface of the downward flow passage 140. Therefore, a water film can be formed so as to expand from the lower end of the rear side surface 144 of the descending flow passage 140, and a siphon action can be generated in the drainage channel.
  • the washing water can be sent to the concave portion 144A formed in the central portion of the rear wall surface 144, there is no problem that the water film is not formed around the concave portion 144A and the siphon action does not occur in the drainage channel. It can be prevented. Therefore, the siphon action can be reliably generated in the drainage channel, and the filth and the like can be transported favorably.
  • the flush type toilet bowl includes the toilet body 51, the tank body 52 placed on the upper surface of the rear of the toilet body 51, and the flush water stored in the tank body 52. It has a distribution pipe 53 for discharging water, and a connection pipe 54 for communicating the discharge port 90A of the toilet body 51 with the inflow port of a drainage pipe (not shown) opened on the floor surface of the toilet room where the toilet body 51 is installed.
  • the toilet body 51 includes a bowl 60, an introduction passage 70, a rising flow passage 80, and a falling flow passage 90.
  • the introduction passage 70, the upward flow passage 80, the downward flow passage 90, and the connection pipe 54 constitute the drainage passage of the flush toilet.
  • the connection pipe 54 has a first narrowed portion 55A formed immediately below the discharge port 90A and a second narrowed portion 55B formed in the lower portion.
  • the connection pipe 54 forms a water film in the vicinity of the first narrowed portion 55A and in the vicinity of the second narrowed portion 55B by the washing water which has fallen down collides with the first narrowed portion 55A and the second narrowed portion 55B and scatters. Do. Thereby, a siphon action can be generated in the drainage channel.
  • the bowl 60 has a first bowl surface 61, a second bowl surface 62 which extends downward continuously from the first bowl surface 61 and is continuous with the first bowl surface 61, and an upper portion of the rear of the second bowl surface 62. And a third bowl surface 63 curved upward.
  • the bowl 60 forms a rim water passage 64 at the upper inner peripheral edge.
  • the distribution pipe 53 has an inflow port 53A connected to the discharge port of the tank main body 52, and a first discharge pipe 53B and a second discharge pipe 53C branched below the inflow port 53A.
  • the flush water stored in the tank main body 52 is spouted from the first discharge pipe 53B along the rim water passage 64, and is spouted from the second discharge pipe 53C toward the rear of the toilet 60 .
  • the flush water spouted from the first discharge pipe 13B along the rim water passage 61 flows to the first bowl surface 61 and the second bowl surface 62 of the bowl 60 while flowing through the rim water passage 64. Therefore, when viewed from above the bowl 60, a horizontal swirl flow is formed in the bowl 60 in a counterclockwise direction.
  • the flush water discharged from the second discharge pipe 13C flows down along the third pot surface 63 and directly flows into the introduction passage 70. Therefore, the force of the horizontal swirling flow in the bowl 60 is reduced at the rear of the bowl 60, and the horizontal swirling flow is swirled on a plane substantially perpendicular to the drainage direction of the introduction passage 70. Can be By this, since the filth and the like can not spread in the bowl 60 and can be collected at the center of the introduction path 70, the filth and the like can be discharged smoothly.
  • the first pot surface 61 forms a curved recess 61 ⁇ / b> A that is recessed downward at the center in the width direction on the front side in plan view.
  • the toilet bowl 60 forms the curved convex part 61B which protruded upwards at the both ends of the width direction of 61 A of recessed parts in planar view.
  • the convex portion 61B is formed in a curved surface having a curvature smaller than that of the concave portion 61A.
  • the recess 61A is gradually lowered toward the rear side of the toilet bowl 60, and the recess 61A can well prevent the rebound of urine on the first bowl surface 61.
  • the washing water which has fallen from the rim water passage 64 to the first bowl surface 61 of the bowl 60 flows along the recess 61A to the second bowl surface 62 at an early stage.
  • the second pot surface 62 is formed in a vertical shape whose entire circumference is downwardly directed or a convex shape expanded toward the sealing surface W side. That is, the second potted surface 62 rises up on the outer periphery of the sealing surface W, and the washing water swirling on the first potted surface 61 is caused to flow down early along the second potted surface 62 to introduce the washing water into the introduction passage 70. Can flow into the For this reason, the filth and the like can be collected in the introduction path 70 without being spread by the second pot surface 62.
  • the second potted surface 62 forms a curved convex R-shaped portion R over the entire circumference of the upper portion.
  • the third bowl surface 63 is also a part of the rounded portion R at the rear of the bowl 60.
  • the toilet bowl 60 forms the rounded portion R with a curved surface with a small curvature at the rear. For this reason, washing water tends to flow down to the introduction path 70.
  • the bowl 60 forms the rounded portion R with a curved surface having a large curvature at the front. For this reason, since the second pot surface 62 is formed in a vertical shape, the wash water falling and swirling in the second pot surface 62 is prevented from spreading to the outside above the second pot surface 62 again, and the wash water Can be directed to the introduction path 70 at an early stage.
  • the planar view shape of the water sealing surface W is a substantially elliptical shape which is long in the front-rear direction as shown in FIG.
  • the water sealing surface W is formed to have the largest curvature on the front side W1 in a plan view shape. For this reason, the washing water is repelled by the second bowl surfaces 62 on the left and right sides of the front part of the sealing water surface W so that the washing water is directed to the introduction path 70.
  • P point which a horizontal width becomes the largest exists in planar view in the sealing surface W in the front side rather than the center of the front-back direction.
  • the washing water which flows from the first pot surface 61 to the sealing surface W along the second pot surface 62 is bounced back at the front side with a large curvature, so that the flow velocity is Increase. For this reason, the filth or the like flows into the introduction path 70 quickly, and the filth or the like can be collected at the upstream end 81 of the rising flow path 80 of the drainage path with a small amount of washing water, and the siphon action can be generated quickly.
  • the introduction passage 70 is continuous with the lower end portion of the bowl 60 and is formed in a tubular shape.
  • the introduction passage 70 is inclined downward from the lower end of the bowl 60 to the rear of the toilet body 51. That is, the introduction passage 70 is inclined downward toward the upstream end 81 of the rising flow passage 80.
  • the downstream end of the introduction passage 70 and the upstream end 81 of the rising flow passage 80 are continuously formed.
  • corner portions 70D and 70E of a lower side surface 70B and left and right side surfaces 70C formed on the left and right sides of the lower side surface 70B are formed in a curved shape.
  • the left corner 70D has a smaller curvature than that of the right corner 70E when viewed from the front of the toilet body 51. That is, the corner portion 70D on the left side is formed by a curved surface which is gentler than the corner portion 70E on the right side.
  • the washing water forming a counterclockwise horizontal swirling flow in the bowl 60 flows into the swirling flow that is swirled on the surface substantially perpendicular to the drainage direction of the introduction path 70 by the washing water flowing down the third bowl surface 63. And flows into the introduction path 70.
  • the left corner portion 70D has a gentle curve, the washing water smoothly flows into the introduction passage 70.
  • the washing water which has flowed into the introduction passage 70 collides with the right side surface 70C which linearly rises from the corner portion 70E having a large curvature and a tight right side, and changes the flow in the downstream direction of the introduction passage 70. For this reason, it is possible to change the flush water swirling in the toilet bowl 60 into a flow toward the upward flow passage 80 of the toilet drainage passage by the introduction passage 70 and to make it straight.
  • the upper side surface 81A and the lower side surface 81B are formed in a substantially horizontal shape.
  • the left and right corner portions of the upper side surface 81A are angularly shaped, and the left and right corner portions 81D and 81E of the lower side surface 81B are formed round and have a substantially cup shape as a whole.
  • the left corner portion 81D has a smaller curvature than the right corner portion 81E. That is, the left corner portion 81D is formed by a curved surface which is gentler than the right corner portion 81E.
  • the upstream end portion 81 of the ascending flow passage 80 is opened in a shape whose lateral dimension is larger than the longitudinal dimension, the longitudinal dimension X is 50 mm, and the transverse dimension Y is 77 mm.
  • the lateral dimension is larger than the vertical dimension at the upstream end 81 of the ascending flow passage 80, washing water and suspended dirt etc. can easily flow into the ascending flow passage 80, and the siphon action can be performed early. Can be generated.
  • the upstream end 81 increases the flow passage area in the upper part where the flow velocity of the washing water is fast by shortening the vertical dimension and enlarging the horizontal dimension, and the washing water smoothly rises. It can flow into the part 81 and can be rectified. Further, since the lateral dimension of the upstream end portion 81 of the ascending flow passage 80 is large, it is possible to prevent the clogging of the filth and the like in this portion. In addition, the flow path area of the upper part with a high flow velocity will be increased by squaring the left and right corner portions of the upper side surface.
  • the cleaning water rectified by the introduction passage 70 is also rectified at the upstream end 81 of the rising flow passage 80, and thus flows into the rising flow passage 80 in a rectified state. For this reason, even if the vertical dimension of the rising flow passage 80 is increased, turbulent flow is less likely to occur, and waste and the like can be discharged smoothly.
  • the upflow passage 80 has a longitudinal dimension X of 62 mm and a lateral dimension Y of 77 mm in the cross-sectional shape in front of the top portion 82. Further, the rising flow passage 80 forms a space 80A in which the central portion of the upper side surface bulges upward. Since the space 80A makes it easy to rotate the dirt when it passes over the top 82, even a hard and long dirt can be discharged over the top 82 to the down flow passage 90 side. That is, it is possible to prevent the clogging of the filth and the like in the vicinity of the top portion 82. For this reason, when the siphon action is generated in the drainage channel, the waste and the like can be favorably discharged with a small amount of washing water without clogging with the waste and the like in the vicinity of the top 82.
  • the upward flow passage 80 has a top 82 formed in a substantially horizontal plane extending in a direction perpendicular to the direction of drainage of the washing water. For this reason, when the sealing surface W in the rising flow passage 80 rises, a large amount of water flows down to the falling flow passage 90 on the downstream side of the top 82 at a stretch. Therefore, the siphon action can be generated early and surely.
  • the lateral dimension Y of the top 82 is 77 mm, which is the same as the lateral dimension of the upstream end 81 of the ascending flow passage 80.
  • the downward flow passage 90 is continuously formed on the downstream side of the upward flow passage 80 as shown in FIG. 21, FIG. 30, and FIG.
  • the downward flow passage 90 is formed in a cylindrical shape extending vertically downward. That is, the downward flow passage 90 is lowered toward the downstream side.
  • the downward flow passage 90 forms a discharge port 90A at the lower end.
  • the discharge port 90A is inserted into the connection port on the upstream side of the connection pipe 54, and is connected to the connection pipe 54 by a packing P.
  • the discharge port 90A communicates with the inflow port of the drain pipe opened to the floor surface of the toilet room via the connection pipe 54.
  • flush water which swirls on the bowl 60 and flows down the second bowl surface 62 and flush water which flows down along the third bowl surface 63 is collected in the introduction passage 70.
  • the sealing water surface W in the ascending flow passage 80 rises, and the washing water flows over the top 82 and flows down to the descending flow passage 90.
  • the washing water discharged from the discharge port 90A of the downward flow passage 90 collides with the throttling portions 55A, 55B formed in the drainage socket 54 and scatters.
  • a water film is formed in the vicinity of the narrowed portions 55A and 55B, and the siphon action can be generated early in the drainage channel. That is, even with a small amount of washing water, the siphon action can be generated at an early stage, and filth and the like can be transported well.
  • the drainage channel of the flush toilet according to the third embodiment can also perform toilet flushing properly.
  • Example 4 In the flush toilet according to the fourth embodiment, as shown in FIG. 33 to FIG. 38, the form of the upflow passage 180 of the toilet drainage channel is different from that of the third embodiment.
  • the other configuration is the same as that of the third embodiment, and the same reference numeral is assigned to the same configuration, and the detailed description is omitted.
  • the rising flow passage 180 has a lower surface 181, rising surfaces 184 and 185 rising in the vertical direction (vertical direction) on the left and right of the lower surface 183, and rising surfaces 184 , 185 are formed from a continuous mountain-shaped upper side surface 186, 187, 188 at the upper end.
  • inclined surfaces 187, 188 inclined downward to the left and right from the upper surface central portion 186 located at the center in the direction perpendicular to the drainage direction of washing water It is formed towards.
  • the inclined surfaces 186 and 188 are formed in a curved surface that bulges inward (in the rising flow channel 180 side) at the upstream portion of the rising flow channel 180.
  • the inclined surfaces 187 and 188 are formed substantially linearly at the downstream side of the middle portion of the rising flow passage 180.
  • the height of the left and right standing surfaces 184 and 185 is maximized in the vicinity of the upstream side of the top portion 182. Further, at this portion, the flow passage area of the rising flow passage 180 is also maximized.
  • the washing water flowing from the upstream side to the downstream side forms a water flow WS having a high flow rate. That is, in the upstream end portion 181 of the rising flow path 180, the washing water sinks downward in the cross-sectional shape perpendicular to the drainage direction of the washing water, and the flow velocity of the washing water becomes slow. For this reason, it becomes easy to produce the stagnation of wash water on the lower side in the cross-sectional shape of a direction perpendicular to the drainage direction of wash water.
  • the upper water flow in the cross-sectional shape in the direction perpendicular to the drainage direction of the washing water flows in the rising flow passage 180 while maintaining a high flow velocity.
  • the water flow having this high flow rate flows in the ascending flow path 180 toward the top 182.
  • the flow velocity on the lower side surface 183 side is increased from the middle portion of the ascending flow path 180 to the front of the top portion 182, and the flow velocity is reduced on the upper side surfaces 186, 187, and 188, and stagnation easily occurs.
  • the upper side surfaces 186, 187, 188 in a mountain shape and forming the inclined surfaces 187, 188 as curved surfaces inward, the flow velocity on the upper side surfaces 186, 187, 188 side is maintained so as not to be too slow. And the flush water is flowing smoothly.
  • the rising flow path 180 allows the flow area of the portion where the water flow WS having a high flow velocity flows to be large and the flow path area of the other portion to be small, so that the washing water flows smoothly without flooding.
  • the upward flow path 180 maintains a high flow rate of the upper water flow in the cross-sectional shape perpendicular to the drainage direction of the cleaning water from the upstream end portion 181 to the middle portion,
  • the flow passage area above the middle in the vertical direction is made larger than the flow passage area on the lower side, and lower than the middle in the vertical direction
  • the flow passage area is formed larger than the flow passage area on the upper side.
  • the upward flow passage 180 forms the lower side surface 183 in the drainage direction of the washing water and a flat surface extending in the direction perpendicular to the drainage direction. For this reason, the ascending flow path 180 can flow a large amount of flush water having a high flow velocity along the lower side surface 183 from the middle portion to the top portion 182.
  • the rising flow passage 180 is formed in the vicinity of the upstream side of the top portion 182 so that the heights of the rising surfaces 184 and 185 become maximum, and the flow passage area is increased. This facilitates the rotation of the dirt as it passes over the top portion 182 of the upward flow passage 180, and prevents the dirt from being clogged at the top portion 182 of the upward flow passage 180.
  • the upper side surfaces 186, 187, 188 are formed in a mountain shape in the vicinity of the upstream side of the top portion 182 in the ascending flow path 180, and the flow velocity of the washing water on the upper side surfaces 186, 187, 188 side does not become too slow. Maintained. This can also prevent the clogging of dirt at the top portion 182 of the upward flow passage 180.
  • the drainage channel of the flush toilet according to the fourth embodiment can also perform toilet flushing properly.
  • the rising flow passage is formed continuously at the downstream end of the introduction passage, but the rising flow passage is formed separately from the downstream end, and the downstream end of the introduction passage It may be linked to
  • the downward flow passage is formed continuously on the downstream side of the upward flow passage, but the downward flow passage is formed separately from the upward flow passage, and the downstream side of the upward flow passage It may be linked to (3)
  • the flush type toilet bowl is used to supply the flush water stored in the tank main body placed on the upper rear surface of the toilet main body to the toilet main body.
  • the lower surface of the ascending flow passage is formed to be a substantially flat surface, but may not be a flat surface.
  • the top has a substantially horizontal surface extending in a direction perpendicular to the drainage direction of the washing water, but the top may not be a substantially horizontal surface.
  • the upper side surface of the ascending flow passage is formed in a mountain shape, but may not be a mountain shape.
  • the shelf portion is lowered rearward along the inner circumferential surface of the descending flow passage, but may not be lowered.
  • the shelf portion gradually narrows rearward along the inner circumferential surface of the descending flow passage, but may not be narrow.
  • the shelf portion is formed on the inclined surface facing the inner upper side, but the shelf portion may be a horizontal surface 241 as shown in FIG. As shown, it may be formed on an inclined surface 341 facing outward and upward.
  • the introduction path connecting the lower end of the toilet bowl and the upstream end of the rising flow path is provided, the introduction path is not provided, and the lower end portion of the toilet bowl is directly connected The upstream end of the rising channel may be connected.
  • the swirling flow that flows counterclockwise in the toilet bowl is formed, but the washing water may be swirled clockwise.
  • the shape of the introduction path is the one obtained by horizontally reversing the shape in the embodiment.
  • the connecting pipe is formed with the throttling portion, but the throttling portion may be formed in the descending flow path.
  • the flow passage area below the center in the vertical direction Is formed larger than the upper flow passage area, but the upper flow passage area may be larger than the lower flow passage area in the vicinity of the upstream end. In the vicinity of the upstream end of the rising flow passage, the washing water often does not fill up to the upper side, and the shape of the upper side and the flow passage area do not affect the flow.
  • the maximum length in the vertical direction is expanded from the upstream end toward the downstream side in the cross-sectional shape in the direction perpendicular to the drainage direction of the washing water, It is sufficient to prevent the dirt and the like from being caught when dirt and the like pass through the top of the downstream end of the flow passage, and the vertical length of the sectional shape of the appropriate position of the rising flow passage is larger than the downstream end Just do it.
  • the introduction passage is formed in an annular shape, but the introduction passage may not be tubular.
  • the lower side surface of the introduction path is an inclined surface which descends, and the corner portions on the left and right sides of the lower side surface are made smaller or larger in curvature of the other corner portion than one corner portion depending on the turning direction of the washing water.
  • the cross-sectional shape of the upstream end of the rising flow passage is substantially cup-shaped, but it may not be cup-shaped.
  • the shape in the cross-sectional shape of the upstream end portion of the ascending flow passage, the shape may be an elliptical shape or the like having a lateral dimension larger than the longitudinal dimension.
  • the flush toilet bowl generates a siphon action, but may be a flush toilet bowl of various cleaning methods, or may be a flush toilet bowl that does not generate a siphon action.
  • the present invention is applicable to 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)

Abstract

L'invention porte sur un canal de drainage de toilette à chasse d'eau apte à un bon nettoyage par chasse d'eau. Le canal de drainage de toilette à chasse d'eau est muni d'un canal à écoulement ascendant (30) communiquant avec le côté aval d'une cuvette de toilette (10) et ascendant dans la direction aval. Le canal à écoulement ascendant (30) est conçu de façon à s'élargir progressivement au fur et à mesure que la surface inférieure (33) se rapproche d'un sommet (32) positionné en aval.
PCT/JP2011/051736 2010-02-01 2011-01-28 Canal de drainage de toilette à chasse d'eau WO2011093440A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13/574,479 US20120284911A1 (en) 2010-02-01 2011-01-28 Drainage channel of flush toilet

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
JP2010-020790 2010-02-01
JP2010020790 2010-02-01
JP2010279723A JP5715404B2 (ja) 2010-12-15 2010-12-15 水洗式便器の排水路
JP2010-279720 2010-12-15
JP2010279720A JP5715402B2 (ja) 2010-12-15 2010-12-15 水洗式便器の排水路
JP2010279722A JP5715403B2 (ja) 2010-12-15 2010-12-15 水洗式便器の排水路
JP2010-279723 2010-12-15
JP2010-279722 2010-12-15
JP2010-294318 2010-12-28
JP2010294318A JP5826485B2 (ja) 2010-02-01 2010-12-28 水洗式便器

Publications (1)

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WO2011093440A1 true WO2011093440A1 (fr) 2011-08-04

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PCT/JP2011/051736 WO2011093440A1 (fr) 2010-02-01 2011-01-28 Canal de drainage de toilette à chasse d'eau

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107407084A (zh) * 2015-03-09 2017-11-28 骊住株式会社 水洗式便器

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4987616A (en) * 1988-10-13 1991-01-29 Eljer Manufacturing, Inc. Water saver water closet
JPH0544242A (ja) * 1991-08-08 1993-02-23 Inax Corp サイホン式洋風便器
JPH07324367A (ja) * 1994-05-31 1995-12-12 Toto Ltd 水洗便器
JP2001026960A (ja) * 1999-07-14 2001-01-30 Toto Ltd 水洗便器
JP2003096887A (ja) * 2001-09-21 2003-04-03 Toto Ltd 水洗式大便器
JP2003239348A (ja) * 2001-12-12 2003-08-27 Toto Ltd 排水弁装置と排水装置並びに便器
JP2007321353A (ja) * 2006-05-30 2007-12-13 Toto Ltd 水洗大便器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4987616A (en) * 1988-10-13 1991-01-29 Eljer Manufacturing, Inc. Water saver water closet
JPH0544242A (ja) * 1991-08-08 1993-02-23 Inax Corp サイホン式洋風便器
JPH07324367A (ja) * 1994-05-31 1995-12-12 Toto Ltd 水洗便器
JP2001026960A (ja) * 1999-07-14 2001-01-30 Toto Ltd 水洗便器
JP2003096887A (ja) * 2001-09-21 2003-04-03 Toto Ltd 水洗式大便器
JP2003239348A (ja) * 2001-12-12 2003-08-27 Toto Ltd 排水弁装置と排水装置並びに便器
JP2007321353A (ja) * 2006-05-30 2007-12-13 Toto Ltd 水洗大便器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107407084A (zh) * 2015-03-09 2017-11-28 骊住株式会社 水洗式便器
CN107407084B (zh) * 2015-03-09 2020-05-12 骊住株式会社 水洗式便器

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