JP2012251379A - Toilet bowl drainage - Google Patents

Toilet bowl drainage Download PDF

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JP2012251379A
JP2012251379A JP2011125660A JP2011125660A JP2012251379A JP 2012251379 A JP2012251379 A JP 2012251379A JP 2011125660 A JP2011125660 A JP 2011125660A JP 2011125660 A JP2011125660 A JP 2011125660A JP 2012251379 A JP2012251379 A JP 2012251379A
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flow path
toilet
channel
ascending
downstream
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JP5930616B2 (en
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Akinori Kamiya
昭範 神谷
Hiroaki Tsutsui
寛明 筒井
Gosuke Sakakibara
豪介 榊原
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Lixil Corp
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Lixil Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a toilet bowl drainage which is adopted for a flush type toilet bowl to enable good washing of the toilet bowl with a smaller amount of washing water.SOLUTION: The toilet bowl drainage is communicated with the downstream side of a bowl part 10 of the flush type toilet bowl. The toilet bowl drainage comprises: a rising flow path 30 which rises toward the downstream side, and of which at least one of the right and left ends of a lower side face 33 of a downstream end 32 extends to the further downstream side than the center in a downward view in the vertical direction; and a falling flow path 40 which continues with the downstream end 32 of the rising flow path 30 and falls toward the downstream side.

Description

本発明は便器排水路に関する。   The present invention relates to a toilet drainage channel.

特許文献1に従来の便器排水路が開示されている。この便器排水路は、便鉢部の下流側に連通し、下流側に向けて上昇した上昇流路を備えている。この上昇流路は下流端部の下側面が略水平に形成されている。また、この便器排水路は、上昇流路の下流端部に連続し、下流側に向けて下降した下降流路を備えている。下降流路は上部に段部を設けている。この段部は、上昇流路の下流端部の下側面から垂直下方に延びた垂直面と、この垂直面の下端から水平方向に延びた水平面とを有している。   Patent Document 1 discloses a conventional toilet drainage channel. This toilet drainage channel is provided with an ascending flow path that communicates with the downstream side of the toilet bowl and rises toward the downstream side. In the ascending flow path, the lower surface of the downstream end portion is formed substantially horizontally. The toilet drainage channel includes a descending channel that is continuous with the downstream end of the ascending channel and descends toward the downstream side. The descending flow path has a stepped portion at the top. The step portion has a vertical surface extending vertically downward from the lower surface of the downstream end portion of the ascending flow channel, and a horizontal surface extending horizontally from the lower end of the vertical surface.

この便器排水路では、上昇流路の下流端部の下側面を乗り越えた洗浄水が下降流路の段部の水平面に衝突し、下降流路の上昇流路側の内壁面から剥がれるように飛散する。飛散した洗浄水は下降流路を塞ぐように水膜を形成する。水膜が下降流路を塞ぐことに起因して、便器排水路内にサイホン作用を発生させることができる。このため、この便器排水路を採用した水洗式便器は、便器洗浄の際、便器排水路内にサイホン作用を発生させ、汚物等を良好に排出することができる。   In this toilet drainage channel, the wash water that has passed over the lower surface of the downstream end of the ascending channel collides with the horizontal surface of the stepped portion of the descending channel and scatters so as to peel off the inner wall surface of the descending channel on the ascending channel side. . The scattered washing water forms a water film so as to block the descending flow path. Due to the water film blocking the descending flow path, a siphon action can be generated in the toilet drainage channel. For this reason, the flush toilet which employs this toilet drainage channel can generate siphon action in the toilet drainage channel during toilet flushing, and can effectively discharge filth and the like.

特開平7−324367号公報JP-A-7-324367

しかし、特許文献1の便器排水路では、段部が下降流路の上部に設けられているため、大流量の洗浄水が段部の水平面に勢いよく衝突しないと、飛散した洗浄水によって下降流路を塞ぐような水膜を形成することができない。このため、便器洗浄の初期段階では、便器排水路内に流入する洗浄水の流量が少ないため、段部の水平面に衝突して飛散する洗浄水によって下降流路を塞ぐことができないおそれがある。つまり、便器洗浄の初期段階に供給される洗浄水は、サイホン作用を発生させるために利用することができないおそれがある。このため、便器排水路内のサイホン作用の発生が遅くなるおそれがある。また、洗浄水の節水化のため、洗浄水の水量を少なくすると、段部の水平面に衝突する洗浄水の流量が減少し、水勢も弱まる。この場合も、段部の水平面に衝突して飛散する洗浄水が形成する水膜によって下降流路を塞ぐことができないおそれがある。さらに、下降流路の上部に段部が設けられているため、サイホン作用が発生した後に下降流路を流下する洗浄水の流れが下降流路の上流側で乱れ、洗浄水が下降流路内をスムーズに流れず、汚物等の排出を良好に行うことができないおそれがある。   However, since the step part is provided in the upper part of the downward flow path in the toilet drainage channel of patent document 1, if the large amount of washing water does not collide with the horizontal surface of the step part vigorously, the scattered washing water causes the downward flow. A water film that blocks the road cannot be formed. For this reason, at the initial stage of toilet flushing, since the flow rate of washing water flowing into the toilet drainage channel is small, there is a possibility that the descending flow path cannot be blocked by washing water that collides with the horizontal surface of the stepped portion and scatters. That is, there is a possibility that the wash water supplied in the initial stage of toilet flushing cannot be used for generating siphon action. For this reason, there exists a possibility that generation | occurrence | production of the siphon effect | action in a toilet drainage channel may become slow. In addition, if the amount of washing water is reduced to save washing water, the flow rate of washing water that collides with the horizontal surface of the step portion is reduced, and the water flow is weakened. Also in this case, there is a possibility that the descending flow path cannot be blocked by the water film formed by the cleaning water that collides with the horizontal surface of the stepped portion and scatters. Further, since the step portion is provided at the upper part of the descending flow path, the flow of the washing water flowing down the descending flow path after the siphon action is generated is disturbed on the upstream side of the descending flow path, and the washing water is in the descending flow path. May not flow smoothly and may not be able to discharge filth and the like well.

本発明は、上記従来の実情に鑑みてなされたものであって、水洗式便器に採用することによって、少ない洗浄水で良好に便器洗浄を行うことができる便器排水路を提供することを解決すべき課題としている。   The present invention has been made in view of the above-described conventional situation, and solves the problem of providing a toilet drainage channel that can be satisfactorily washed with a small amount of washing water by being employed in a flush toilet. It should be a challenge.

第1発明の便器排水路は、水洗式便器の便鉢部の下流側に連通する便器排水路であって、
下流側に向けて上昇しており、垂直方向の下方視において、下流端部の下側面の左右少なくとも一方の端部が中央部に比べて下流側に延びている上昇流路と、
この上昇流路の下流端部に連続し、下流側に向けて下降した下降流路とを備えていることを特徴とする。
The toilet drainage channel of the first invention is a toilet drainage channel communicating with the downstream side of the toilet bowl of the flush toilet,
Ascending flow path that rises toward the downstream side, and in the vertical downward view, at least one of the left and right ends of the lower surface of the downstream end portion extends to the downstream side compared to the central portion;
It is characterized by comprising a descending channel that continues to the downstream end of the ascending channel and descends toward the downstream side.

この便器排水路では、垂直方向の下方視において、上昇流路の下流端部の下側面の左右少なくとも一方の端部が中央部に比べて下流側に延びている。このため、上昇流路の下流端部の下側面の左右端部であって、中央部に比べて下流側に延びている端部に沿って洗浄水が流れる。つまり、洗浄水は、直ぐに垂直下方に流れ落ちず、下降流路の内周面に沿った水平方向の成分を有する流れを形成することができる。洗浄水が水平方向の成分を有して下降流路の内周面に沿って流れるため、洗浄水は下降流路の内周面の全周に亘って流下する。このため、下降流路を洗浄水によって塞ぎ易くすることができる。つまり、下降流路の内周面に内側に突出した絞り部を設け、この絞り部の上方から流下した洗浄水が絞り部の上面に衝突することによって、洗浄水が飛散して水膜を形成するようにした場合、下降流路の内周面の全周に亘って洗浄水が流下するため、下降流路の内周面の全周から下降流路の中心に向かって洗浄水を飛散させることができる。このため、少ない洗浄水でも下降流路を塞ぐように水膜を形成することができ、サイホン作用を良好に発生させることができる。また、下降流路の上部(上流側)に洗浄水を飛散させる段部を設けないため、サイホン作用が発生した後、下降流路内を洗浄水がスムーズに流れ、汚物等の排出を良好に行うことができる。   In the toilet drainage channel, at least one of the left and right ends of the lower surface of the downstream end portion of the ascending channel extends downstream as compared with the central portion when viewed in the vertical direction. For this reason, the wash water flows along the left and right end portions of the lower surface of the downstream end portion of the ascending flow path, and the end portion extending to the downstream side as compared with the central portion. That is, the washing water does not immediately flow down vertically, but can form a flow having a horizontal component along the inner peripheral surface of the descending flow path. Since the wash water has a horizontal component and flows along the inner peripheral surface of the descending flow path, the wash water flows down over the entire circumference of the inner peripheral surface of the descending flow path. For this reason, it is possible to easily block the descending flow path with the washing water. In other words, a throttle part protruding inwardly is provided on the inner peripheral surface of the descending flow path, and the cleaning water that flows down from above the throttle part collides with the upper surface of the throttle part, so that the cleaning water scatters to form a water film. In this case, since the cleaning water flows down over the entire inner peripheral surface of the descending flow path, the cleaning water is scattered from the entire inner peripheral surface of the descending flow path toward the center of the descending flow path. be able to. For this reason, a water film can be formed so as to block the descending flow path even with a small amount of washing water, and a siphon action can be generated satisfactorily. In addition, since there is no step part to disperse the cleaning water in the upper part (upstream side) of the descending flow path, after the siphon action occurs, the cleaning water flows smoothly in the descending flow path, and the discharge of filth etc. is improved It can be carried out.

したがって、第1発明の便器排水路を採用した水洗式便器は、少ない洗浄水で良好に便器洗浄を行うことができる。   Therefore, the flush toilet which employs the toilet drainage channel of the first invention can perform toilet flushing with a small amount of washing water.

前記上昇流路は、洗浄水の排水方向に対して直角方向の断面形状において、下流端部の上流側近傍の下側面が中央部を上方に突出した凸面であり得る。この場合、上昇流路の下流側端部の上流側近傍において、下側面の左右端部は中央部に比べて緩やかな昇り傾斜にすることができる。また、上昇流路の上流端部の上流側近傍において、下側面の左右端部に水平面を形成しない。このため、上昇流路の上流端部の左右端部に向けて上昇流路を洗浄水が良好に流れ、便器洗浄の初期段階から洗浄水を下降流路の内周面に沿って流すことができる。よって、便器洗浄の初期段階に下降流路を塞ぐ水膜を形成することができ、サイホン作用を早期に発生させることができる。つまり、少ない洗浄水でもサイホン作用を良好に発生することができ、便器洗浄を良好に行うことができる。   The ascending flow path may be a convex surface in which a lower side surface in the vicinity of the upstream side of the downstream end portion protrudes upward from the central portion in a cross-sectional shape perpendicular to the direction of flushing the washing water. In this case, in the vicinity of the upstream side of the downstream end portion of the ascending flow path, the left and right end portions of the lower side surface can be made to rise gently as compared with the central portion. Further, in the vicinity of the upstream side of the upstream end portion of the ascending flow path, a horizontal plane is not formed at the left and right end portions of the lower side surface. For this reason, the wash water flows well in the ascending flow channel toward the left and right end portions of the upstream end of the ascending flow channel, and the wash water can flow along the inner peripheral surface of the descending flow channel from the initial stage of toilet flushing. it can. Therefore, it is possible to form a water film that closes the descending flow path in the initial stage of toilet flushing, and it is possible to generate siphon action early. That is, the siphon action can be generated satisfactorily even with a small amount of washing water, and the toilet bowl can be washed well.

前記下降流路は、前記上昇流路の下流端部の下側面の左右端部から斜め下方に向けて延びており、内周面に沿って内側に突出した棚部を有し得る。この場合、上昇流路の下流端部の下側面の左右端部から棚部に沿って洗浄水を流すことができる。このため、便器洗浄の初期段階、つまり、便器排水路内に流入する洗浄水の流量が少ないときでも、洗浄水を下降流路の内周面の全周に沿って確実に流すことができる。よって、少ない洗浄水でも水膜を形成して下降流路を塞ぐことができ、サイホン作用を発生させて便器洗浄を良好に行うことができる。   The descending channel extends obliquely downward from left and right ends of the lower surface of the downstream end of the ascending channel, and may have a shelf that protrudes inward along the inner peripheral surface. In this case, the wash water can flow along the shelf from the left and right ends of the lower surface of the downstream end of the ascending flow path. For this reason, even in the initial stage of toilet flushing, that is, when the flow rate of the wash water flowing into the toilet drainage channel is small, the wash water can surely flow along the entire circumference of the inner peripheral surface of the descending flow path. Therefore, even with a small amount of washing water, a water film can be formed to block the descending flow path, and siphon action can be generated to perform toilet cleaning well.

第2発明の便器排水路は、水洗式便器の便鉢部の下流側に連通する便器排水路であって、
下流側に向けて上昇しており、垂直方向の上方視において、上流端部の上側面の左右少なくとも一方の端部が中央部に比べて下流側に延びている上昇流路を備えていることを特徴とする。
The toilet drainage channel of the second invention is a toilet drainage channel communicating with the downstream side of the toilet bowl portion of the flush toilet,
Ascending toward the downstream side, and when viewed from above in the vertical direction, provided with an ascending flow path in which at least one of the left and right ends of the upper side surface of the upstream end portion extends to the downstream side compared to the central portion. It is characterized by.

この便器排水路では、垂直方向の上方視において、上昇流路の上流端部の上側面の左右少なくとも一方の端部が中央部に比べて下流側に延びている。このため、上昇流路の上流端部の上側面の左右端部であって、中央部に比べて下流側に延びている端部に沿った洗浄水の流れを形成することができる。これにより、上昇流路の入り口で洗浄水の流れを整流することができ、上昇流路内へ洗浄水等が流れ込み易くすることができる。このため、少ない洗浄水でも汚物等の排出を良好に行うことができる。   In this toilet drainage channel, when viewed from above in the vertical direction, at least one of the left and right ends of the upper surface of the upstream end of the ascending channel extends downstream from the center. For this reason, it is possible to form a flow of cleaning water along the left and right end portions of the upper surface of the upstream end portion of the ascending flow path and extending to the downstream side as compared with the central portion. Thereby, the flow of the washing water can be rectified at the entrance of the ascending channel, and the washing water or the like can easily flow into the ascending channel. For this reason, filth etc. can be discharged satisfactorily with a small amount of washing water.

したがって、第2発明の便器排水路を採用した水洗式便器も、少ない洗浄水で良好に便器洗浄を行うことができる。   Therefore, the flush toilet that employs the toilet drainage channel of the second invention can also perform toilet flushing with a small amount of washing water.

第3発明の便器排水路は、水洗式便器の便鉢部の下流側に連通する便器排水路であって、
前記便鉢部と下流側に向けて上昇した上昇流路とを連通しており、洗浄水の排水方向に対して直角方向の断面形状において、前記上昇流路の上流端部の上流側近傍の上側面が中央部を下方に突出した凸面である導入路を備えていることを特徴とする。
The toilet drainage channel of the third invention is a toilet drainage channel communicating with the downstream side of the toilet bowl portion of the flush toilet,
The toilet bowl communicates with the rising channel rising toward the downstream side, and in the cross-sectional shape perpendicular to the draining direction of the washing water, in the vicinity of the upstream side of the upstream end of the rising channel. The upper side surface is provided with an introduction path which is a convex surface projecting downward from the central portion.

この便器排水路では、上昇流路の上流端部の上流側近傍において、導入路の上側面の左右端部が中央部に比べて高い位置に形成されている。このため、導入路から上昇流路の上流端部にかけて、左右端部を通過する洗浄水等は、便鉢部から上昇流路へ流れ込む際の流れ方向の変化が少なくてすむ。よって、導入路から上昇流路の上流端部にかけて、左右端部を洗浄水等が勢いよく通過し、便鉢部から上昇流路へ洗浄水等が流れ込み易くなるため、少ない洗浄水でも汚物等の排出を良好に行うことができる。また、導入路の中央部に比べて高い位置に形成された左右端部に空気が集まる。左右端部に上方に集まった空気は、導入路内に流入する洗浄水が衝突し、拡散するため、空気が砕ける音を低減させることができる。   In this toilet drainage channel, in the vicinity of the upstream side of the upstream end portion of the ascending channel, the left and right end portions of the upper side surface of the introduction channel are formed at higher positions than the central portion. For this reason, there is little change in the flow direction when washing water or the like passing through the left and right ends from the introduction path to the upstream end of the ascending channel flows from the toilet bowl to the ascending channel. Therefore, washing water and the like pass through the left and right ends from the introduction path to the upstream end of the ascending flow path, and the washing water easily flows from the toilet bowl to the ascending flow path. Can be discharged satisfactorily. In addition, air collects at the left and right end portions formed at a higher position than the central portion of the introduction path. The air gathered upward at the left and right end portions collides and diffuses the cleaning water flowing into the introduction path, so that it is possible to reduce the sound of air breaking.

したがって、第3発明の便器排水路を採用した水洗式便器も、少ない洗浄水で良好に便器洗浄を行うことができる。   Therefore, the flush toilet using the toilet drainage channel of the third invention can also perform toilet flushing with a small amount of washing water.

前記上昇流路の上側面は、洗浄水の排水方向に対して直角方向の断面形状において、中央部から左右下方に向けて徐々に横幅を広くした山型であり得る。上昇流路の上側面の近傍は洗浄水の流速が遅くなるため、この領域を山型にすることによって、その領域の流路面積を小さくして洗浄水の流速を速くし、洗浄水の淀みを防止することができる。このため、上昇流路内の洗浄水を良好に流すことができ、少ない洗浄水でも汚物等の排出を良好に行うことができる。   The upper side surface of the ascending channel may be a mountain shape having a width that gradually increases from the center toward the lower left and right in a cross-sectional shape perpendicular to the direction of draining the wash water. Since the flow rate of the wash water is slow in the vicinity of the upper surface of the ascending flow path, by making this area a mountain shape, the flow area in that area is reduced to increase the flow speed of the wash water, and the stagnation of the wash water Can be prevented. For this reason, the washing water in the ascending flow path can be flowed satisfactorily, and filth etc. can be discharged well even with a small amount of washing water.

実施例1の水洗式便器の断面図である。It is sectional drawing of the flush toilet bowl of Example 1. FIG. 実施例1の水洗式便器の平面図である。It is a top view of the flush toilet bowl of Example 1. 図1の矢視A−A断面図である。It is arrow AA sectional drawing of FIG. 図1の矢視B−B断面図である。It is arrow BB sectional drawing of FIG. 図1の矢視C−C断面図である。It is CC sectional view taken on the line of FIG. 図1の矢視D−D断面図である。It is arrow DD sectional drawing of FIG. (A)実施例1の上昇流路の断面図である。(B)図7(A)の矢視E−E〜I−I断面図である。(C)図7(A)の矢視J−J断面図である。(A) It is sectional drawing of the ascending flow path of Example 1. FIG. (B) It is arrow EE-II sectional drawing of FIG. 7 (A). (C) It is JJ sectional drawing of the arrow of FIG. 7 (A). 図1の矢視K−K断面図である。It is arrow KK sectional drawing of FIG. 図1の矢視L−L断面図である。It is LL sectional drawing of the arrow of FIG. 図1の矢視P−P断面図である。It is arrow PP sectional drawing of FIG. 図1の矢視Q−Q断面図である。It is QQ sectional drawing of the arrow of FIG. 図1の矢視R−R断面図である。It is RR sectional drawing of the arrow of FIG. 図1の矢視R−Rの反対側から見た断面図である。It is sectional drawing seen from the opposite side of the arrow RR of FIG. 実施例2の水洗式便器の断面図である。It is sectional drawing of the flush toilet bowl of Example 2. FIG. 図14の矢視W−W断面図である。It is arrow WW sectional drawing of FIG. 図14の矢視X−X断面図である。It is arrow XX sectional drawing of FIG.

第1〜第3発明の便器排水路を備えた水洗式便器を具体化した実施例1及び2を図面を参照しつつ説明する。   Embodiments 1 and 2 embodying a flush toilet equipped with the toilet drainage channel of the first to third inventions will be described with reference to the drawings.

<実施例1>
実施例1の水洗式便器は、図1及び図2に示すように、便器本体1、便器本体1の後部上面に載置したタンク本体2、タンク本体2に貯留した洗浄水を便器本体1に吐水する分配管3、及び便器本体1の排水口40Aと便器本体1が設置されるトイレルームの床面に開口する図示しない排水管の流入口とを接続する接続配管4を有している。接続配管4は、排水口40Aの直下に排水口40Aから流下した洗浄水が衝突し、飛散する絞り部5を形成している。この絞り部5の上面に洗浄水が衝突して飛散することによって水膜形成領域Sに水膜が形成される。これによって、便器排水路内にサイホン作用を発生させることができる。
<Example 1>
As shown in FIGS. 1 and 2, the flush toilet according to the first embodiment has a toilet body 1, a tank body 2 placed on the rear upper surface of the toilet body 1, and flush water stored in the tank body 2 in the toilet body 1. It has a distribution pipe 3 for discharging water, and a connection pipe 4 for connecting a drain outlet 40A of the toilet body 1 and an inflow port of a drain pipe (not shown) opened on the floor surface of the toilet room where the toilet body 1 is installed. The connecting pipe 4 forms a throttle portion 5 where the wash water flowing down from the drain port 40A collides and scatters immediately below the drain port 40A. A water film is formed in the water film formation region S when the cleaning water collides with and splashes on the upper surface of the throttle portion 5. Thereby, a siphon action can be generated in the toilet drainage channel.

便器本体1は、便鉢部10、導入路20、上昇流路30、及び下降流路40を備えている。導入路20、上昇流路30、下降流路40及び接続配管4内の流路が便器排水路を構成している。   The toilet body 1 includes a toilet bowl 10, an introduction channel 20, an ascending channel 30, and a descending channel 40. The introduction channel 20, the rising channel 30, the descending channel 40 and the channel in the connection pipe 4 constitute a toilet drainage channel.

便鉢部10は上部内周縁にリム通水路11を形成している。分配管3は、タンク本体2の排出口を挿入する流入口を有した流入管3Aと、流入管3Aの下部で分岐した第1吐水管3B及び第2吐水管3Cとを有している。便器洗浄を実行すると、タンク本体2に貯留した洗浄水を第1吐水管3Bからリム通水路11に沿って吐水するとともに、第2吐水管3Cから便鉢部10の後部に向けて吐水する。第1吐水管3Bからリム通水路11に沿って吐水した洗浄水は、リム通水路11上を流れつつ、便鉢部10の表面に流れ落ちる。また、第1吐水管3Bから吐水する洗浄水の水量は第2吐水管3Cから吐水する洗浄水の水量よりも多いため、便鉢部10の上方から見ると、便鉢部10内には反時計回りに流れる旋回流FLが形成される。   The toilet bowl 10 forms a rim water passage 11 at the upper inner periphery. The distribution pipe 3 includes an inflow pipe 3A having an inflow port into which the discharge port of the tank body 2 is inserted, and a first water discharge pipe 3B and a second water discharge pipe 3C branched at the lower portion of the inflow pipe 3A. When toilet flushing is performed, the wash water stored in the tank body 2 is discharged from the first water discharge pipe 3B along the rim water passage 11 and discharged from the second water discharge pipe 3C toward the rear portion of the toilet bowl 10. The wash water discharged from the first water discharge pipe 3 </ b> B along the rim water passage 11 flows down on the surface of the toilet bowl 10 while flowing on the rim water passage 11. Moreover, since the amount of the wash water discharged from the first water discharge pipe 3B is larger than the amount of the wash water discharged from the second water discharge pipe 3C, when viewed from the upper side of the toilet bowl 10, the toilet bowl 10 has a counter-current. A swirling flow FL that flows clockwise is formed.

導入路20は、図1及び図3〜図6に示すように、便鉢部10の下端部に連続しており、管状に形成されている。導入路20は、便鉢部10の下端部から便器本体1の後方に向けて下方に傾斜している。つまり、導入路20は上昇流路30の上流端部31へ向けて下方に傾斜している。導入路20の下流端部と上昇流路30の上流端部31とは連続して形成されている。導入路20及び上昇流路30の上流端部31は、洗浄水の排水方向に対して直角方向の断面形状において、左下コーナー部20L、31BLの方が右下コーナー部20R、31BRに比べ曲率の小さい緩やかな曲がり具合のR面に形成されている。これに伴い、右側面21C、31Cが直線的に立ち上がっている。   As shown in FIGS. 1 and 3 to 6, the introduction path 20 is continuous to the lower end of the toilet bowl 10 and is formed in a tubular shape. The introduction path 20 is inclined downward from the lower end of the toilet bowl 10 toward the rear of the toilet body 1. That is, the introduction path 20 is inclined downward toward the upstream end 31 of the ascending path 30. The downstream end portion of the introduction path 20 and the upstream end portion 31 of the ascending flow path 30 are formed continuously. The upstream end portion 31 of the introduction channel 20 and the ascending channel 30 has a cross-sectional shape perpendicular to the direction of drainage of the washing water, and the lower left corner portions 20L and 31BL have a curvature compared to the lower right corner portions 20R and 31BR. It is formed on the R surface with a small gentle bend. Accordingly, the right side surfaces 21C and 31C rise linearly.

洗浄水は、便鉢部10内で反時計回りに流れる旋回流FLを形成して導入路20内に流入する。この際、左下コーナー部20Lが緩やかな曲がり具合のR面であるため洗浄水は導入路20内にスムーズに流入する。導入路20内に流入した洗浄水は、曲率の大きい曲がり具合がきついR面の右下コーナー部20Rから直線的に立ち上がっている右側面21Cに衝突して排水路の下流方向への流れに変化する。このように、導入路20によって、便鉢部10内で旋回していた洗浄水の流れを排水路の下流方向の流れに変化して、かつ下流方向の流れを加速し、整流化することができる。   The washing water forms a swirl flow FL that flows counterclockwise in the toilet bowl 10 and flows into the introduction path 20. At this time, since the lower left corner portion 20 </ b> L is an R surface that is gently bent, the cleaning water smoothly flows into the introduction path 20. The washing water that has flowed into the introduction channel 20 collides with the right side surface 21C rising linearly from the lower right corner portion 20R of the R surface with a large curvature and changes into a flow in the downstream direction of the drainage channel. To do. As described above, the flow of the washing water swirling in the toilet bowl 10 can be changed to the flow in the downstream direction of the drainage channel, and the flow in the downstream direction can be accelerated and rectified by the introduction channel 20. it can.

上昇流路30の上流端部31の上流側近傍の導入路20は、図4及び図5に示すように、洗浄水の排水方向に対して直角方向の断面形状において、上側面31Tが中央部31Mを下方に突出させた凸面に形成されている。つまり、上昇流路30の上流端部31の上流側近傍において、導入路20の上側面31Tの左右端部31UL、31URが中央部31Mに比べて高い位置に形成されている。このため、導入路20から上昇流路30の上流端部31にかけて、左右端部31UL、31URを通過する洗浄水等は、便鉢部10から上昇流路30へ流れ込む際の流れ方向の変化が少なくてすみ、また、洗浄水の流れを整流化することができる。よって、導入路20から上昇流路30の上流端部31にかけて、上側面31Tの左右端部31UL、31URを洗浄水等が勢いよく通過し、便鉢部10から上昇流路30へ洗浄水等が流れ込み易くなるため、少ない洗浄水でも汚物等の排出を良好に行うことができる。   As shown in FIGS. 4 and 5, the introduction path 20 in the vicinity of the upstream side of the upstream end portion 31 of the ascending flow path 30 has a cross-sectional shape perpendicular to the direction of draining the washing water, and the upper side surface 31 </ b> T is the central portion. It is formed in the convex surface which made 31M protrude below. That is, in the vicinity of the upstream side of the upstream end portion 31 of the ascending flow path 30, the left and right end portions 31UL and 31UR of the upper side surface 31T of the introduction path 20 are formed at higher positions than the central portion 31M. For this reason, from the introduction path 20 to the upstream end part 31 of the ascending flow path 30, the flow of washing water passing through the left and right end parts 31UL, 31UR is changed when flowing from the toilet bowl 10 into the ascending flow path 30. Less is required and the flow of cleaning water can be rectified. Therefore, from the introduction path 20 to the upstream end portion 31 of the ascending flow path 30, the washing water and the like pass through the left and right end portions 31UL and 31UR of the upper side surface 31T, and the washing water and the like pass from the toilet bowl 10 to the ascending flow path 30. Since it becomes easy to flow in, filth etc. can be discharged | emitted favorably with little washing water.

また、上昇流路30の上流端部31の上流側近傍において、導入路20の上側面31Tの左右端部31UL、31URが中央部31Mに比べて高い位置に形成されているため、左右端部31UL、31URに空気が集まる。左右端部31UL、31URに集まった空気は、導入路20に流入する洗浄水が衝突し、拡散するため、空気がはじける音を低減させることができる。   Further, in the vicinity of the upstream side of the upstream end portion 31 of the ascending flow path 30, the left and right end portions 31UL and 31UR of the upper side surface 31T of the introduction path 20 are formed at positions higher than the central portion 31M. Air collects at 31UL and 31UR. Since the air collected at the left and right end portions 31UL and 31UR collides and diffuses with the wash water flowing into the introduction path 20, it is possible to reduce the sound of air repelling.

また、上昇流路30の上流端部31の近傍は、断面形状が横長の略矩形である。上昇流路30の上流端部31を境にして、洗浄水の排水方向が下方向から上方向に変化するため、上側面31T側に流速の速い洗浄水が流れる。上昇流路30の上流端部31の近傍の排水路の断面形状において、上下寸法を大きくすると、下側面31B側の洗浄水の流速が遅くなり、下側面31B側の近傍の整流化された洗浄水が淀んでしまうおそれがある。そこで、上昇流路30の上流端部31の近傍においては、上下方向の寸法を小さくして整流化された洗浄水が淀まないようにするとともに、流量を確保するために横方向の寸法を大きく形成している。このため、上昇流路30の上流端部31の近傍は断面形状が横長の略矩形に形成している。   Further, the vicinity of the upstream end 31 of the ascending flow path 30 is a substantially rectangular shape having a horizontally long cross-sectional shape. With the upstream end portion 31 of the ascending flow path 30 as a boundary, the washing water discharge direction changes from the lower direction to the upper direction, so that the washing water having a high flow velocity flows on the upper side surface 31T side. In the cross-sectional shape of the drainage channel in the vicinity of the upstream end 31 of the ascending flow path 30, if the vertical dimension is increased, the flow rate of the cleaning water on the lower side 31B side becomes slower, and the rectified cleaning in the vicinity on the lower side 31B side is performed. There is a risk that the water will be lost. Therefore, in the vicinity of the upstream end portion 31 of the ascending flow path 30, the vertical dimension is reduced so that the rectified washing water does not accumulate, and the lateral dimension is set in order to secure the flow rate. Largely formed. For this reason, the vicinity of the upstream end 31 of the ascending flow path 30 is formed in a substantially rectangular shape with a horizontally long cross-sectional shape.

上述したように、曲率の大きい曲がり具合のきついR面の右下コーナー部20Rから直線的に立ち上がった右側面21Cによって、導入路20内で洗浄水の流れを排水路の下流方向に変化させ、かつ下流方向への流れを加速することによって最適化を図ることができる。   As described above, the right side surface 21C rising linearly from the lower right corner portion 20R of the tightly curved R surface with a large curvature changes the flow of washing water in the introduction channel 20 in the downstream direction of the drainage channel, And optimization can be achieved by accelerating the flow in the downstream direction.

さらに、上昇流路30の上流端部31は、図6に示すように、垂直方向の上方視において、上側面31Tの左右端部31UL、31URが中央部31Mに比べて下流側(図6において左側)に延びている。つまり、上昇流路30の上流端部31は、垂直方向の上方視において、中央部31Mが上流側に凹んだ湾曲状に形成されている。このため、上昇流路30の上流端部31の上側面31Tの左右端部31UL、31URに沿って洗浄水等の流れを形成することができる。つまり、導入路20が左右端部31UL、31URにおいて、下流側に延びていることになり、導入路20に連続して洗浄水の流れを整流することができ、上昇流路30内へ洗浄水等が流れ込み易くすることができる。このため、少ない洗浄水でも汚物等の排出を良好に行うことができる。   Further, as shown in FIG. 6, the upstream end portion 31 of the ascending flow path 30 has the left and right end portions 31UL, 31UR of the upper side surface 31T on the downstream side in FIG. (Left side). That is, the upstream end portion 31 of the ascending flow path 30 is formed in a curved shape in which the central portion 31M is recessed upstream as viewed in the vertical direction. For this reason, a flow of cleaning water or the like can be formed along the left and right end portions 31UL and 31UR of the upper side surface 31T of the upstream end portion 31 of the ascending flow path 30. In other words, the introduction path 20 extends downstream in the left and right end portions 31UL and 31UR, and the flow of the washing water can be rectified continuously to the introduction path 20, and the washing water enters the ascending flow path 30. Etc. can easily flow in. For this reason, filth etc. can be discharged satisfactorily with a small amount of washing water.

上昇流路30は上流端部31から便器本体1の後方(下流側)に向けて上昇している。上昇流路30は、図1、図7(A)〜(C)及び図8に示すように、下側面33、下側面33の左右両端から立ち上がる左右側面34L、34R、及び左右側面34L、34Rの上端を連結する上側面35に囲まれて形成されている。   The ascending flow path 30 rises from the upstream end portion 31 toward the rear (downstream side) of the toilet body 1. As shown in FIGS. 1, 7 </ b> A to 7 </ b> C, and FIG. 8, the ascending channel 30 includes a lower side surface 33, left and right side surfaces 34 </ b> L and 34 </ b> R rising from left and right ends of the lower side surface 33, and left and right side surfaces 34 </ b> L and 34 </ b> R. It is surrounded by an upper side surface 35 connecting the upper ends of the two.

上昇流路30は、洗浄水の排水方向に対して直角方向の断面形状において、上流端部31より下流側において上側面35が中央部から左右下方に向けて徐々に横幅を広くした山型に形成されている。これによって、上昇流路30の上側面35の近傍における洗浄水の流速が遅くなる領域において、流路面積を小さくすることによって、洗浄水の流速を速くして洗浄水の淀みを防止することができる。このため、上昇流路30内の洗浄水を良好に流すことができ、少ない洗浄水でも汚物等の排出を良好に行うことができる。   The ascending flow path 30 has a cross-sectional shape in a direction perpendicular to the direction of washing water drainage, and has a mountain shape in which the upper side surface 35 gradually widens from the central portion toward the left and right sides on the downstream side of the upstream end portion 31. Is formed. As a result, in the region where the flow rate of the wash water in the vicinity of the upper side surface 35 of the ascending flow path 30 becomes slow, the flow rate of the wash water can be increased to prevent stagnation of the wash water by reducing the flow channel area. it can. For this reason, the washing water in the ascending flow path 30 can be flowed satisfactorily, and filth and the like can be discharged well even with a small amount of washing water.

また、山型に形成された上側面35は、上流端部31の下流側近傍において、中央部から左右下方に延びて内側に膨らんだ傾斜面に傾斜している。上流端部31の下流側近傍では、洗浄水の流れ方向が下方向から上方向に変化した直後であるため、上側面35の近傍において洗浄水が淀み易い。このため、この淀み易い領域の上側面35を内側に膨らんだ傾斜面にすることによって、洗浄水の流速をさらに速くし、整流化された洗浄水の淀みを防止することができる。これによっても、上昇流路30内の洗浄水が良好に流すことができ、少ない洗浄水でも汚物等の排出を良好に行うことができる。   Further, the upper side surface 35 formed in a mountain shape is inclined in the vicinity of the downstream side of the upstream end portion 31 to an inclined surface that extends downward from the center portion to the left and right and expands inward. In the vicinity of the downstream side of the upstream end portion 31, immediately after the flow direction of the cleaning water changes from the lower direction to the upper direction, the cleaning water tends to stagnate in the vicinity of the upper side surface 35. For this reason, by making the upper side surface 35 of this easy-to-stagnate area into an inclined surface that swells inward, it is possible to further increase the flow rate of the wash water and prevent stagnation of the rectified wash water. Also by this, the washing water in the ascending flow path 30 can be flowed favorably, and filth etc. can be discharged well even with a small amount of washing water.

上昇流路30の下側面33は下流側に向けて徐々に横幅を広げている。上昇流路30の下側面33の近傍では上流側より下流側において洗浄水の流速が速い。このため、上昇流路30の下側面30を下流端に向けて徐々に横幅を広げることによって、洗浄水の流速が速い領域の流路面積を拡大し、大流量の洗浄水が上昇流路30を流れるようにしている。   The lower side surface 33 of the ascending channel 30 gradually increases in width toward the downstream side. In the vicinity of the lower surface 33 of the ascending channel 30, the flow rate of the washing water is faster on the downstream side than on the upstream side. For this reason, by gradually widening the width of the lower surface 30 of the ascending flow channel 30 toward the downstream end, the flow channel area in the region where the flow rate of the washing water is high is expanded, and a large flow of washing water flows up the ascending flow channel 30. To flow.

また、上昇流路30の下流端部32の上流側近傍の下側面33は、図8に示すように、洗浄水の排水方向に対して直角方向の断面形状において、中央部33Mが上方に突出した凸面に形成されている。このため、上昇流路30の下側面33は、図7(B)に示すように、中間部から下流側に向けて徐々に中央部が上方に突出した凸面に形成されている。   Further, as shown in FIG. 8, the lower side surface 33 in the vicinity of the upstream side of the downstream end portion 32 of the ascending flow path 30 has a central portion 33 </ b> M protruding upward in a cross-sectional shape perpendicular to the direction of washing water drainage. It is formed on the convex surface. For this reason, as shown in FIG. 7B, the lower side surface 33 of the ascending flow path 30 is formed as a convex surface whose central portion gradually protrudes upward from the intermediate portion toward the downstream side.

また、上昇流路30は、図9に示すように、垂直方向の下方視において、下流端部32の下側面33の左右端部33L、33Rが中央部に比べて下流側に延びている。このため、上昇流路30の下流端部32の下側面33の左右端部33L、33Rに沿って流れた洗浄水が下流端部32の左右端部を超えて、下降流路40の内周面に沿った水平方向の成分を有する流れを形成する。洗浄水は、水平方向の成分を有して下降流路40の内周面に沿って流れるため、下降流路40の内周面の全周に亘って流下する。このため、下降流路40の内周面の全周から絞り部5に洗浄水が流下し、絞り部5の上面に衝突して、下降流路40の内周面の全周から下降流路40の中心に向かって洗浄水を飛散させることができる。   Further, as shown in FIG. 9, in the ascending flow path 30, the left and right end portions 33 </ b> L and 33 </ b> R of the lower side surface 33 of the downstream end portion 32 extend toward the downstream side as compared with the central portion when viewed in the vertical direction. For this reason, the wash water that flows along the left and right end portions 33L and 33R of the lower side surface 33 of the downstream end portion 32 of the ascending flow path 30 exceeds the left and right end portions of the downstream end portion 32, and the inner periphery of the descending flow path 40 A flow having a horizontal component along the plane is formed. Since the wash water has a horizontal component and flows along the inner peripheral surface of the descending flow path 40, it flows down over the entire circumference of the inner peripheral surface of the descending flow path 40. For this reason, the wash water flows down from the entire inner peripheral surface of the descending flow path 40 to the throttle unit 5 and collides with the upper surface of the throttle unit 5, and then descends from the entire circumference of the inner peripheral surface of the down flow channel 40. The washing water can be scattered toward the center of 40.

このように、上昇流路30は、洗浄水の排水方向に対して直角方向の断面形状において、下流端部32の上流側近傍の下側面33が中央部33Mに比べて左右端部33L、33Rを緩やかな昇り傾斜にすることができる。また、上昇流路30の下流端部32の上流側近傍において、下側面33の左右端部33L、33Rに水平面を形成しない。このため、便器洗浄が開始されると、洗浄水は上昇流路30の下流端部32の左右端部33L、33Rに向けて上昇流路30を洗浄水が良好に流れ、洗浄水は下降流路40の内周面の全周に亘って流下する。このため、便器洗浄の初期段階に、下降流路40の内周面の全周から流下した洗浄水が接続配管4の絞り部5に衝突して飛散することによって、水膜形成領域Sに水膜を形成し、排水路内にサイホン作用を早期に発生させることができる。また、少ない洗浄水でも下降流路40を塞ぐように水膜を形成することができ、サイホン作用を良好に発生させることができる。さらに、下降流路40の上部(上流側)に洗浄水を飛散させる段部を設けないため、サイホン作用が発生した後、下降流路40内を洗浄水がスムーズに流れ、汚物等の排出を良好に行うことができる。   As described above, the ascending flow path 30 has a cross-sectional shape perpendicular to the direction in which the washing water is drained, and the lower side surface 33 near the upstream side of the downstream end portion 32 has left and right end portions 33L and 33R as compared to the central portion 33M. Can be made a gentle ascending slope. Further, in the vicinity of the upstream side of the downstream end portion 32 of the ascending flow path 30, a horizontal plane is not formed on the left and right end portions 33 </ b> L and 33 </ b> R of the lower side surface 33. For this reason, when toilet flushing is started, the wash water flows well in the ascending flow path 30 toward the left and right end portions 33L and 33R of the downstream end portion 32 of the ascending flow path 30, and the wash water flows downward. It flows down over the entire circumference of the inner circumferential surface of the path 40. For this reason, at the initial stage of toilet flushing, the wash water flowing down from the entire inner peripheral surface of the descending flow path 40 collides with the throttle portion 5 of the connection pipe 4 and scatters, so that water is formed in the water film formation region S. A membrane is formed, and siphon action can be generated early in the drainage channel. Moreover, a water film can be formed so as to block the descending flow path 40 with a small amount of washing water, and a siphon action can be generated satisfactorily. Furthermore, since there is no step portion for scattering the cleaning water on the upper part (upstream side) of the descending flow path 40, after the siphon action occurs, the cleaning water flows smoothly through the descending flow path 40, and discharge of filth, etc. It can be done well.

したがって、実施例1の便器排水路を採用した水洗式便器は、少ない洗浄水で良好に便器洗浄を行うことができる。   Therefore, the flush toilet which employs the toilet drainage channel of Example 1 can perform toilet flushing with a small amount of washing water.

下降流路40は、図1、及び図10〜図13に示すように、上昇流路30の下流側に連続して形成されている。下降流路40は垂直下方に延びている。つまり、下降流路40は下流側に向けて下降している。下降流路40は下端部に排出口40Aを形成している。排出口40Aは、接続配管4の上流側の接続口に挿入され、接続配管4を介してトイレルームの床面に開口する排水管の流入口に連通することができる。   As shown in FIG. 1 and FIGS. 10 to 13, the downward flow path 40 is continuously formed on the downstream side of the upward flow path 30. The descending flow path 40 extends vertically downward. That is, the descending flow path 40 descends toward the downstream side. The descending flow path 40 forms a discharge port 40A at the lower end. The discharge port 40 </ b> A is 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 that opens to the floor surface of the toilet room via the connection pipe 4.

下降流路40は、上昇流路30の下流端部32の下側面33の左右端部33L、33Rから斜め下方に向けて延びた棚部41を有している。この棚部41は、下降流路40の内周面に沿って内側に突出し、内側上方を向いた傾斜面から形成されている。棚部41が下降流路40の内周面に沿って内側に突出しているため、上昇流路30の下流端部32の下側面33の左右端部33L、33Rを乗り越えた洗浄水が棚部41に沿って流れ、下降流路40の上昇流路30から離れた方向に洗浄水を送ることができる。便器洗浄の初期段階、つまり、便器排水路内に流入する洗浄水の流量が少ないときから、洗浄水を下降流路40の内周面の全周に沿って確実に流すことができる。棚部41から下降流路40内に流れ落ちた洗浄水は、接続配管4に形成した絞り部5に衝突して飛散する。これによって、少ない洗浄水でも水膜形成領域Sに水膜が形成され、排水路内にサイホン作用を早期に発生させることができ、便器洗浄を良好に行うことができる。   The descending flow path 40 includes a shelf 41 that extends obliquely downward from the left and right end portions 33L and 33R of the lower side surface 33 of the downstream end portion 32 of the ascending flow path 30. The shelf portion 41 is formed from an inclined surface that protrudes inward along the inner peripheral surface of the descending flow path 40 and faces upward inward. Since the shelf 41 protrudes inward along the inner peripheral surface of the descending flow path 40, the wash water that has passed over the left and right end portions 33L and 33R of the lower side surface 33 of the downstream end 32 of the ascending flow path 30 is the shelf. The wash water can be sent in the direction away from the ascending channel 30 of the descending channel 40. From the initial stage of toilet flushing, that is, when the flow rate of the wash water flowing into the toilet drainage channel is small, the wash water can surely flow along the entire circumference of the inner circumferential surface of the descending flow path 40. The washing water that has flowed down from the shelf 41 into the descending flow path 40 collides with the throttle 5 formed in the connection pipe 4 and scatters. Accordingly, a water film is formed in the water film formation region S even with a small amount of washing water, and a siphon action can be generated in the drainage channel at an early stage, so that toilet bowl washing can be performed satisfactorily.

また、棚部41が内側上方を向いた傾斜面からなるため、棚部41によって下降流路40の流路面積が小さくなるが、その変化を緩やかにすることができる。このため、棚部41による汚物等の詰まりを防止することができ、汚物等の搬送を良好に行うことができる。   Moreover, since the shelf 41 is formed of an inclined surface facing inward and upward, the flow channel area of the descending flow channel 40 is reduced by the shelf 41, but the change can be moderated. For this reason, clogging of filth etc. by shelf part 41 can be prevented, and conveyance of filth etc. can be performed favorably.

また、棚部41は上昇流路30の下流端部32の下側面33から下降流路40の内周面に沿って斜め下方に延びている。このため、上昇流路30の下流端部32の下側面33から棚部41に流れる洗浄水が少なくても下降流路40の内周面に沿って上昇流路30とは反対側の下降流路40の内周面まで洗浄水を送ることができる。つまり、少ない洗浄水でも下降流路40の内周面の全周から洗浄水が流れ落ち、水膜形成領域Sに水膜を確実に形成することができる。よって、少ない洗浄水で早期にサイホン作用を発生させることができ、汚物等の搬送を良好に行うことができる。   Further, the shelf 41 extends obliquely downward along the inner peripheral surface of the descending channel 40 from the lower surface 33 of the downstream end 32 of the ascending channel 30. For this reason, even if there is little washing water flowing from the lower surface 33 of the downstream end portion 32 of the ascending channel 30 to the shelf 41, the descending flow on the opposite side of the ascending channel 30 along the inner peripheral surface of the descending channel 40 Wash water can be sent to the inner peripheral surface of the path 40. That is, even with a small amount of cleaning water, the cleaning water flows down from the entire circumference of the inner peripheral surface of the descending flow path 40, and a water film can be reliably formed in the water film forming region S. Therefore, the siphon action can be generated at an early stage with a small amount of washing water, and filth and the like can be transported satisfactorily.

また、棚部41は下降流路40の内周面に沿って、上昇流路30の反対方向に向けて幅が徐々に細くなっている。棚部41は、排水路内にサイホン作用が発生し、下降流路40内を洗浄水と共に汚物等が流れる際には抵抗となる。このため、棚部41の幅を上昇流路30の反対方向に向けて徐々に細くすることにより、早期にサイホン作用を発生させることができるとともに、洗浄水等の流れの抵抗を減少し、汚物等の搬送を良好に行うことができる。   Further, the width of the shelf 41 gradually decreases along the inner circumferential surface of the descending channel 40 in the direction opposite to the ascending channel 30. The shelves 41 have a siphon action in the drainage channel and become a resistance when filth or the like flows along with the cleaning water in the descending flow path 40. For this reason, by gradually narrowing the width of the shelf 41 in the opposite direction of the ascending flow path 30, it is possible to generate siphon action at an early stage and reduce the resistance of the flow of washing water, etc. Etc. can be carried out satisfactorily.

<実施例2>
実施例2の水洗式便器は、図14に示すように、便器排水路の下降流路140の下流端に連通し、便器本体101の後方に向けて横方向に延びる横引き流路146を有している。また、この水洗式便器は、下降流路140の後側面144の外周面の中央部に垂直方向に延びて便器本体101の後部を補強する補強壁150を有している。他の構成は、実施例1と同様であり、同一の構成については同一の符号を付し詳細な説明を省略する。
<Example 2>
As shown in FIG. 14, the flush toilet of Example 2 has a horizontal pulling channel 146 that communicates with the downstream end of the descending channel 140 of the toilet drainage channel and extends laterally toward the rear of the toilet body 101. is doing. The flush toilet has a reinforcing wall 150 that extends in the vertical direction to the center of the outer peripheral surface of the rear side surface 144 of the descending flow path 140 and reinforces the rear portion of the toilet body 101. Other configurations are the same as those of the first embodiment, and the same components are denoted by the same reference numerals and detailed description thereof is omitted.

横引き流路146は下降流路140の下流端に連続して形成されている。横引き流路146の下流端に設けられた排出口140Aは便器本体101の後方に向けて開口している。排出口140Aは、接続部材5の上流側の接続口に挿入され、接続部材5を介してトイレルームの壁面から引き出された排水管の流入口に連通することができる。   The horizontal pulling channel 146 is formed continuously at the downstream end of the descending channel 140. A discharge port 140 </ b> A provided at the downstream end of the horizontal pulling channel 146 opens toward the rear of the toilet body 101. The discharge port 140 </ b> A is 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 out from the wall surface of the toilet room via the connection member 5.

この水洗式便器は、実施例1の水洗式便器に比べ、導入路の傾斜が急激に下降しており、上昇流路の傾斜が急激に上昇している。導入路20は、図15に示すように、洗浄水の排水方向に対して直角方向の断面形状において、上昇流路30の上流端部31の上流側近傍の上側面31Tが中央部31Mを下方に突出させた凸面に形成されている。つまり、上昇流路30の上流端部31の上流側近傍において、導入路20の上側面31Tの左右端部31UL、31URが中央部31Mに比べて高い位置に形成されている。このため、導入路20から上昇流路30の上流端部31にかけて、左右端部31UL、31URを通過する洗浄水等は、便鉢部10から上昇流路30へ流れ込む際の流れ方向の変化が少なくてすみ、また、洗浄水の流れを整流化することができる。よって、挿入路20から上昇流路30の上流端部31にかけて、上側面31Tの左右端部31UL、31URを洗浄水等が勢いよく通過し、便鉢部10から上昇流路30へ洗浄水等が流れ込み易くなるため、少ない洗浄水でも汚物等の排出を良好に行うことができる。   In this flush toilet, compared to the flush toilet of Example 1, the slope of the introduction path is rapidly lowered, and the slope of the ascending flow path is rapidly raised. As shown in FIG. 15, the introduction path 20 has a cross-sectional shape perpendicular to the direction of draining the washing water, and the upper side surface 31T in the vicinity of the upstream side of the upstream end portion 31 of the ascending flow path 30 is below the central portion 31M. It is formed in the convex surface made to project. That is, in the vicinity of the upstream side of the upstream end portion 31 of the ascending flow path 30, the left and right end portions 31UL and 31UR of the upper side surface 31T of the introduction path 20 are formed at higher positions than the central portion 31M. For this reason, from the introduction path 20 to the upstream end part 31 of the ascending flow path 30, the flow of washing water passing through the left and right end parts 31UL, 31UR is changed when flowing from the toilet bowl 10 into the ascending flow path 30. Less is required and the flow of cleaning water can be rectified. Therefore, from the insertion path 20 to the upstream end portion 31 of the ascending flow path 30, the washing water and the like pass through the left and right end portions 31UL and 31UR of the upper side surface 31T, and the washing water and the like pass from the toilet bowl 10 to the ascending flow path 30. Since it becomes easy to flow in, filth etc. can be discharged | emitted favorably with little washing water.

また、上昇流路30の上流端部31の近傍は、断面形状が横長の略矩形である。上昇流路30の上流端部31を境にして、洗浄水の排水方向が下方向から上方向に変化するため、上側面31T側に流速の速い洗浄水が流れる。上昇流路30の上流端部31の近傍の排水路の断面形状において、上下寸法を大きくすると、下側面31B側の洗浄水の流速が遅くなり、下側面31B側の近傍の整流化された洗浄水が淀んでしまうおそれがある。そこで、上昇流路30の上流端部31の近傍においては、上下方向の寸法を小さくして整流化された洗浄水が淀まないようにするとともに、流量を確保するために横方向の寸法を大きく形成している。このため、上昇流路30の上流端部31の近傍は断面形状が横長の略矩形に形成している。   Further, the vicinity of the upstream end 31 of the ascending flow path 30 is a substantially rectangular shape having a horizontally long cross-sectional shape. With the upstream end portion 31 of the ascending flow path 30 as a boundary, the washing water discharge direction changes from the lower direction to the upper direction, so that the washing water having a high flow velocity flows on the upper side surface 31T side. In the cross-sectional shape of the drainage channel in the vicinity of the upstream end 31 of the ascending flow path 30, if the vertical dimension is increased, the flow rate of the cleaning water on the lower side 31B side becomes slower, and the rectified cleaning in the vicinity on the lower side 31B side is performed. There is a risk that the water will be lost. Therefore, in the vicinity of the upstream end portion 31 of the ascending flow path 30, the vertical dimension is reduced so that the rectified washing water does not accumulate, and the lateral dimension is set in order to secure the flow rate. Largely formed. For this reason, the vicinity of the upstream end 31 of the ascending flow path 30 is formed in a substantially rectangular shape with a horizontally long cross-sectional shape.

また、上昇流路30の上流端部31は、図16に示すように、垂直方向の上方視において、上側面31Tの左右端部31UL、31URが中央部31Mに比べて下流側(図16において左側)に延びている。つまり、上昇流路30の上流端部31は、垂直方向の上方視において、中央部31Mが上流側に凹んだ湾曲状に形成されている。このため、上昇流路30の上流端部31の上側面31Tの左右端部31UL、31URに沿って洗浄水の流れを形成することができる。つまり、導入路20が左右端部31UL、31URにおいて、下流側に延びていることになり、導入路20に連続して洗浄水等の流れを整流することができ、上昇流路30内へ洗浄水等が流れ込み易くすることができる。このため、少ない洗浄水でも汚物等の排出を良好に行うことができる。   Further, as shown in FIG. 16, the upstream end portion 31 of the ascending flow path 30 has the left and right end portions 31UL, 31UR of the upper side surface 31T on the downstream side (in FIG. (Left side). That is, the upstream end portion 31 of the ascending flow path 30 is formed in a curved shape in which the central portion 31M is recessed upstream as viewed in the vertical direction. For this reason, the flow of cleaning water can be formed along the left and right end portions 31UL and 31UR of the upper side surface 31T of the upstream end portion 31 of the ascending flow path 30. That is, the introduction path 20 extends downstream in the left and right end portions 31UL and 31UR, and the flow of the wash water or the like can be rectified continuously to the introduction path 20 and the washing into the ascending flow path 30 is performed. Water or the like can easily flow. For this reason, filth etc. can be discharged satisfactorily with a small amount of washing water.

したがって、実施例2の便器排水路を採用した水洗式便器も、少ない洗浄水で良好に便器洗浄を行うことができる。   Therefore, the flush toilet using the toilet drainage channel of Example 2 can also perform toilet flushing with a small amount of washing water.

本発明は上記記述及び図面によって説明した実施例1及び2に限定されるものではなく、例えば次のような実施例も本発明の技術的範囲に含まれる。
(1)実施例1及び2では、垂直方向の下方視において、上昇流路の下流端部の下側面の左右端部が中央部に比べて下流側に延びているが、左右少なくとも一方の端部が中央部に比べて下流側に延びていればよい。
(2)実施例1及び2では、洗浄水の排水方向に対して直角方向の断面形状において、上昇流路の下流端部の上流側近傍の下側面が中央部を上方に突出した凸面に形成されているが、水平面であってもよい。
(3)実施例1及び2では、下降流路が棚部を有しているが、棚部を有していなくてもよい。
(4)実施例1及び2では、垂直方向の上方視において、上昇流路の上流端部の上側面の左右端部が中央部に比べて下流側に延びているが、左右少なくとも一方の端部が中央部に比べて下流側に延びていればよい。
(5)実施例1及び2では、洗浄水の排水方向に対して直角方向の断面形状において、導入路の上昇流路の上流端部の上流側近傍の上側面が中央部を下方に突出した凸面に形成されているが、水平面であってもよい。
(6)実施例1及び2では、上昇流路の上側面が山型であるが、山型でなくてもよい。
(7)実施例1及び2では、上昇流路を導入路の下流端部に連続して形成しているが、上昇流路を下流端部とは別体に形成して、導入路の下流端部に連結してもよい。
(8)実施例1及び2では、下降流路を上昇流路の下流側に連続して形成しているが、下降流路を上昇流路とは別体に形成して、上昇流路の下流側に連結してもよい。
(9)実施例1及び2では、便器本体の後部上面に載置したタンク本体に貯留した洗浄水を便器本体に供給する水洗式便器であるが、タンク本体を有さず、開閉弁を介して給水源から直接的に洗浄水を供給する水洗式便器であってもよい。
(10)実施例1及び2では、棚部が下降流路の内周面に沿って斜め下方に向けて延びているが、水平方向に延びていてもよい。
(11)実施例1及び2では、便鉢部の下端部と上昇流路の上流端部とを連結する導入路を備えているが、導入路を備えず、便鉢部の下端部に直接的に上昇流路の上流端部を連結してもよい。
(12)実施例1及び2では、便鉢部内に反時計回りに流れる旋回流を形成したが、洗浄水を時計回りに旋回させるものであってもよい。この場合、導入路の形状は実施例における形状を左右反転したものになる。
(13)実施例1及び2では、接続配管に絞り部を形成したが、下降流路に絞り部を形成してもよい。
(14)実施例1及び2では、水洗式便器はサイホン作用が発生するものであったが、各種洗浄方式の水洗式便器でよく、サイホン作用が発生しない水洗式便器であってもよい。
The present invention is not limited to the first and second embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the first and second embodiments, the left and right end portions of the lower surface of the downstream end portion of the ascending flow channel extend more downstream than the central portion when viewed in the vertical direction. The part should just extend in the downstream rather than the center part.
(2) In Examples 1 and 2, the lower side surface in the vicinity of the upstream side of the downstream end portion of the ascending flow path is formed as a convex surface projecting upward from the central portion in a cross-sectional shape perpendicular to the direction of washing water drainage. However, it may be a horizontal plane.
(3) In Examples 1 and 2, the descending flow path has a shelf, but it may not have a shelf.
(4) In the first and second embodiments, the left and right ends of the upper surface of the upstream end of the ascending channel extend downstream as compared to the central portion when viewed from above in the vertical direction. The part should just extend in the downstream rather than the center part.
(5) In Examples 1 and 2, in the cross-sectional shape perpendicular to the direction of washing water drainage, the upper side surface in the vicinity of the upstream side of the upstream end of the ascending flow path of the introduction path protrudes downward from the central part. Although it is formed on a convex surface, it may be a horizontal surface.
(6) In Examples 1 and 2, the upper side surface of the ascending flow path is a mountain shape, but may not be a mountain shape.
(7) In Examples 1 and 2, the ascending flow path is formed continuously with the downstream end of the introduction path, but the ascending flow path is formed separately from the downstream end, You may connect with an edge part.
(8) In Examples 1 and 2, the descending channel is formed continuously downstream of the ascending channel, but the descending channel is formed separately from the ascending channel, You may connect with a downstream side.
(9) In the first and second embodiments, the flush toilet is configured to supply flush water stored in the tank body placed on the rear upper surface of the toilet body to the toilet body, but does not have the tank body and is provided with an on-off valve. Alternatively, a flush toilet that supplies wash water directly from a water supply source may be used.
(10) In Examples 1 and 2, the shelf portion extends obliquely downward along the inner peripheral surface of the descending flow path, but may extend in the horizontal direction.
(11) In Example 1 and 2, although the introduction path which connects the lower end part of a toilet bowl part and the upstream end part of an ascending flow path is provided, an introduction path is not provided but it is directly in the lower end part of a toilet bowl part. Alternatively, the upstream end of the ascending channel may be connected.
(12) In Examples 1 and 2, the swirling flow that flows counterclockwise is formed in the toilet bowl, but the washing water may be swirled clockwise. In this case, the shape of the introduction path is a horizontally reversed version of the shape in the embodiment.
(13) In Embodiments 1 and 2, the throttle portion is formed in the connection pipe, but the throttle portion may be formed in the descending flow path.
(14) In Examples 1 and 2, the flush toilet bowl generates a siphon action, but may be a flush toilet bowl of various washing types, or may be a flush toilet bowl that does not generate a siphon action.

本発明は水洗式便器に利用可能である。   The present invention can be used for flush toilets.

10…便鉢部
30…上昇流路
31…(上昇流路の)上流端部
31T…上側面
31UL、31UR…(上側面の)左右端部
31M…(上側面の)中央部
32…(上昇流路の)下流端部
33…下側面
33L、33R…(下側面の)左右端部
33M…(下側面の)中央部
35…(上昇流路の)上側面
40…下降流路
41…棚部
DESCRIPTION OF SYMBOLS 10 ... Toilet bowl part 30 ... Ascending flow path 31 ... Upstream end part 31T (upward flow path) 31T ... Upper side surface 31UL, 31UR ... (Upper side surface) Left and right end parts 31M ... (Upper side surface) Central part 32 ... (Upward) Downstream end 33 of channel 33 ... Lower side 33L, 33R ... Left and right ends 33M ... Center of lower side 35 ... Upper side of up channel 40 ... Down channel 41 ... Shelf Part

Claims (6)

水洗式便器の便鉢部の下流側に連通する便器排水路であって、
下流側に向けて上昇しており、垂直方向の下方視において、下流端部の下側面の左右少なくとも一方の端部が中央部に比べて下流側に延びている上昇流路と、
この上昇流路の下流端部に連続し、下流側に向けて下降した下降流路とを備えていることを特徴とする便器排水路。
A toilet drainage channel communicating with the downstream side of the toilet bowl of the flush toilet,
Ascending flow path that rises toward the downstream side, and in the vertical downward view, at least one of the left and right ends of the lower surface of the downstream end portion extends to the downstream side compared to the central portion;
A toilet drainage channel comprising a descending channel that is continuous with the downstream end of the ascending channel and descends toward the downstream side.
前記上昇流路は、洗浄水の排水方向に対して直角方向の断面形状において、下流端部の上流側近傍の下側面が中央部を上方に突出した凸面であることを特徴とする請求項1記載の便器排水路。   2. The ascending channel according to claim 1, wherein a lower side surface in the vicinity of the upstream side of the downstream end portion is a convex surface projecting upward from the central portion in a cross-sectional shape perpendicular to the direction of washing water drainage. The toilet drainage channel described. 前記下降流路は、前記上昇流路の下流端部の下側面の左右端部から斜め下方に向けて延びており、内周面に沿って内側に突出した棚部を有していることを特徴とする請求項1又は2記載の便器排水路。   The descending flow path extends obliquely downward from the left and right ends of the lower surface of the downstream end of the ascending flow path, and has a shelf that protrudes inward along the inner peripheral surface. The toilet drainage channel according to claim 1 or 2, characterized by the above. 水洗式便器の便鉢部の下流側に連通する便器排水路であって、
下流側に向けて上昇しており、垂直方向の上方視において、上流端部の上側面の左右少なくとも一方の端部が中央部に比べて下流側に延びている上昇流路を備えていることを特徴とする便器排水路。
A toilet drainage channel communicating with the downstream side of the toilet bowl of the flush toilet,
Ascending toward the downstream side, and when viewed from above in the vertical direction, provided with an ascending flow path in which at least one of the left and right ends of the upper side surface of the upstream end portion extends to the downstream side compared to the central portion. A toilet drainage channel.
水洗式便器の便鉢部の下流側に連通する便器排水路であって、
前記便鉢部と下流側に向けて上昇した上昇流路とを連通しており、洗浄水の排水方向に対して直角方向の断面形状において、前記上昇流路の上流端部の上流側近傍の上側面が中央部を下方に突出した凸面である導入路を備えていることを特徴とする便器排水路。
A toilet drainage channel communicating with the downstream side of the toilet bowl of the flush toilet,
The toilet bowl communicates with the rising channel rising toward the downstream side, and in the cross-sectional shape perpendicular to the draining direction of the washing water, in the vicinity of the upstream side of the upstream end of the rising channel. A toilet drainage channel comprising an introduction channel whose upper surface is a convex surface projecting downward from the center.
前記上昇流路の上側面は、洗浄水の排水方向に対して直角方向の断面形状において、中央部から左右下方に向けて徐々に横幅を広くした山型であることを特徴とする請求項1乃至5のいずれか1項記載の便器排水路。   The upper side surface of the ascending channel is a mountain shape whose width is gradually increased from the center toward the lower left and right in a cross-sectional shape perpendicular to the direction of draining the washing water. The toilet drainage channel of any one of thru | or 5.
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015067955A (en) * 2013-09-26 2015-04-13 Toto株式会社 Water closet
JP2016056606A (en) * 2014-09-10 2016-04-21 Toto株式会社 urinal
JP2016094762A (en) * 2014-11-14 2016-05-26 Toto株式会社 Flush toilet bowl
JP2016176182A (en) * 2015-03-18 2016-10-06 Toto株式会社 Flush toilet bowl
JP2018028262A (en) * 2017-11-22 2018-02-22 Toto株式会社 Flush toilet
CN113323092A (en) * 2020-02-28 2021-08-31 Toto株式会社 Flushing toilet
JP2022081669A (en) * 2019-12-25 2022-05-31 Toto株式会社 Flush toilet bowl

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JPH02106075U (en) * 1989-02-03 1990-08-23
JPH0544242A (en) * 1991-08-08 1993-02-23 Inax Corp Siphon type western stool
JPH0723080U (en) * 1993-10-04 1995-04-25 株式会社イナックス Siphon toilet
JPH1113117A (en) * 1997-06-23 1999-01-19 Toto Ltd Flush closet bowl

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Publication number Priority date Publication date Assignee Title
JPH02106075U (en) * 1989-02-03 1990-08-23
JPH0544242A (en) * 1991-08-08 1993-02-23 Inax Corp Siphon type western stool
JPH0723080U (en) * 1993-10-04 1995-04-25 株式会社イナックス Siphon toilet
JPH1113117A (en) * 1997-06-23 1999-01-19 Toto Ltd Flush closet bowl

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015067955A (en) * 2013-09-26 2015-04-13 Toto株式会社 Water closet
JP2016056606A (en) * 2014-09-10 2016-04-21 Toto株式会社 urinal
JP2016094762A (en) * 2014-11-14 2016-05-26 Toto株式会社 Flush toilet bowl
US10301809B2 (en) 2014-11-14 2019-05-28 Toto Ltd. Flush toilet
JP2016176182A (en) * 2015-03-18 2016-10-06 Toto株式会社 Flush toilet bowl
JP2018028262A (en) * 2017-11-22 2018-02-22 Toto株式会社 Flush toilet
JP2022081669A (en) * 2019-12-25 2022-05-31 Toto株式会社 Flush toilet bowl
CN113323092A (en) * 2020-02-28 2021-08-31 Toto株式会社 Flushing toilet
CN113323092B (en) * 2020-02-28 2023-01-06 Toto株式会社 Flushing toilet

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