JP6827638B2 - Flush toilet - Google Patents

Flush toilet Download PDF

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JP6827638B2
JP6827638B2 JP2018197155A JP2018197155A JP6827638B2 JP 6827638 B2 JP6827638 B2 JP 6827638B2 JP 2018197155 A JP2018197155 A JP 2018197155A JP 2018197155 A JP2018197155 A JP 2018197155A JP 6827638 B2 JP6827638 B2 JP 6827638B2
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toilet bowl
spout
wall surface
water
vertical inner
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JP2019007350A (en
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寛明 筒井
寛明 筒井
善博 吉澤
善博 吉澤
友樹 足立
友樹 足立
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Lixil Corp
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Description

本発明は、水洗式大便器に関する。 The present invention relates to a flush toilet.

特許文献１には、便鉢と、便鉢の上端縁部に沿って形成されたリムと、便鉢の内面上端縁に沿った形成された上部鉛直内壁面と、上部鉛直内壁面に開口する吐水口とを備えた水洗式大便器が開示されている。この水洗式大便器は、吐水口から吐出した洗浄水により、便鉢内を洗浄するとともに、便鉢内の汚物を排出するようになっている。 Patent Document 1 opens to the toilet bowl, the rim formed along the upper end edge of the toilet bowl, the upper vertical inner wall surface formed along the upper end edge of the inner surface of the toilet bowl, and the upper vertical inner wall surface. A flush toilet with a plumb bob is disclosed. In this flush toilet, the inside of the toilet bowl is washed with the washing water discharged from the spout, and the filth in the toilet bowl is discharged.

特許第４９４１７９６号公報Japanese Patent No. 4941796

上記の水洗式大便器では、便鉢の上部鉛直内壁面のうち吐水口の開口領域の近傍に、オーバーハング部が形成されている。オーバーハング部の上面は、便鉢の水平な上面とほぼ面一状に連なっている。したがって、便鉢の上部鉛直内壁面のうちオーバーハング部が形成されている領域が汚れていた場合に、上から便鉢を覗き込んでも、その汚れ具合を目視で確認し難いという問題がある。 In the above flush toilet, an overhang portion is formed in the vicinity of the opening region of the spout on the upper vertical inner wall surface of the toilet bowl. The upper surface of the overhang portion is substantially flush with the horizontal upper surface of the toilet bowl. Therefore, when the region of the upper vertical inner wall surface of the toilet bowl where the overhang portion is formed is dirty, there is a problem that it is difficult to visually check the degree of contamination even if the toilet bowl is looked into from above.

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、便鉢の上部鉛直内壁面を全周に亘って目視できる水洗式大便器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-mentioned conventional circumstances, and it is an object to be solved to provide a flush toilet that allows the upper vertical inner wall surface of the toilet bowl to be visually observed over the entire circumference.

第１の発明の水洗式大便器は、便鉢と、前記便鉢の上端縁部に形成されたリムと、前記便鉢の内面上端部に形成され、前記便鉢の全周に亘って前記リムの上端面内周縁部に連なる上部鉛直内壁面と、前記上部鉛直内壁面に開口し、洗浄水を吐出して平面視において前記上部鉛直内壁面に接するように旋回する旋回流を生成する吐水口と、前記便鉢のうち前後方向における中央よりも後方の位置に配され、排水路に連なる溜水部とを備え、前記吐水口が、前記溜水部の溜水面よりも後方に配され、且つ左右方向において前記溜水部の溜水面と重なるように開口し、前記吐水口から吐出した洗浄水の一部が、下向きの誘導流を生成し、前記便鉢の後端部では、前記上部鉛直内壁面に沿うように旋回してきた前記旋回流が、前記誘導流によって下向きに誘導されて前記溜水部に流れ込むようになっており、前記上部鉛直内壁面の前端部は、前記リムの上端面に対して直角をなす鉛直方向の向き、及び前記リムの上端面に対して鈍角をなし、鉛直方向に対して上端側が前記便鉢の外側へ僅かに傾いた向きのいずれか一方の向きである。
第２の発明の水洗式大便器は、便鉢と、前記便鉢の上端縁部に形成されたリムと、前記便鉢の内面上端部に形成され、前記便鉢の全周に亘って前記リムの上端面内周縁部に連なる上部鉛直内壁面と、前記上部鉛直内壁面に開口し、洗浄水を吐出して平面視において前記上部鉛直内壁面に接するように旋回する旋回流を生成する吐水口と、前記便鉢のうち前後方向における中央よりも後方の位置に配され、排水路に連なる溜水部とを備え、前記吐水口が、前記溜水部の溜水面よりも後方に配され、前記吐水口から吐出した洗浄水の一部が、下向きの誘導流を生成し、前記便鉢の後端部では、前記上部鉛直内壁面に沿うように旋回してきた前記旋回流が、前記誘導流によって下向きに誘導されて前記溜水部に流れ込むようになっており、前記吐水口の一部のみが、左右方向において前記溜水部の溜水面と同じ領域に開口し、前記吐水口の左右方向における一方の端部が、前記溜水面に対して左右方向へ外れた領域に開口し、前記吐水口から、前記旋回流と前記誘導流が吐出される。
第２の発明において、リムの上端面に対して直角に連なる上部鉛直内壁面の向きは、厳密な鉛直方向に限らず、鉛直方向に対して上端側が便鉢の内側へ僅かに傾いた向き（つまり、リムの上端面と鋭角をなす向き）と、鉛直方向に対して上端側が便鉢の外側へ僅かに傾いた向き（つまり、リムの上端面と鈍角をなす向き）も含む。 The water-washable toilet bowl of the first invention is formed on a toilet bowl, a rim formed on the upper end edge of the toilet bowl, and an inner upper end of the toilet bowl, and covers the entire circumference of the toilet bowl. An upper vertical inner wall surface connected to the inner peripheral edge of the upper end surface of the rim and an upper vertical inner wall surface are opened to discharge washing water to generate a swirling flow that swirls so as to be in contact with the upper vertical inner wall surface in a plan view. The water outlet is provided at a position rearward of the center of the toilet bowl in the front-rear direction and is connected to the drainage channel, and the spout is arranged behind the water reservoir surface of the water reservoir. In addition, a part of the washing water discharged from the spout is generated as a downward guided flow by opening so as to overlap the pool surface of the pool portion in the left-right direction, and at the rear end portion of the toilet bowl, the said The swirling flow that has swirled along the upper vertical inner wall surface is guided downward by the guided flow and flows into the pool portion, and the front end portion of the upper vertical inner wall surface is the rim. One of the vertical orientations perpendicular to the upper end surface and the direction in which the upper end side is slightly inclined to the outside of the toilet bowl with respect to the upper end surface of the rim. Is.
The water-washing toilet bowl of the second invention is formed on a toilet bowl, a rim formed on the upper end edge of the toilet bowl, and an inner upper end of the toilet bowl, and covers the entire circumference of the toilet bowl. An upper vertical inner wall surface connected to the inner peripheral edge of the upper end surface of the rim and an upper vertical inner wall surface are opened, and washing water is discharged to generate a swirling flow that swirls so as to be in contact with the upper vertical inner wall surface in a plan view. The toilet bowl is provided with a water outlet and a water reservoir located behind the center of the toilet bowl in the front-rear direction and connected to the drainage channel, and the spout is arranged behind the water reservoir surface of the water reservoir. A part of the washing water discharged from the spout generates a downward guided flow, and at the rear end of the toilet bowl, the swirling flow swirling along the upper vertical inner wall surface causes the guided flow. It is guided downward by the flow and flows into the water spout, and only a part of the water spout opens in the same area as the water storage surface of the water spout in the left-right direction, and the left and right of the water spout. One end in the direction opens in a region deviating from the water reservoir surface in the left-right direction, and the swirling flow and the induced flow are discharged from the water discharge port.
In the second invention, the direction of the upper vertical inner wall surface that is perpendicular to the upper end surface of the rim is not limited to the strict vertical direction, but the direction in which the upper end side is slightly inclined toward the inside of the toilet bowl with respect to the vertical direction ( That is, the direction that forms a sharp angle with the upper end surface of the rim) and the direction in which the upper end side is slightly inclined to the outside of the toilet bowl with respect to the vertical direction (that is, the direction that forms a right angle with the upper end surface of the rim) are also included.

吐水口が開口する上部鉛直内壁面は、全周に亘り、リムの上端面と直角に連なっていてオーバーハング部を有していないので、リムより高い位置の視点からでも、上部鉛直内壁面の全領域を全周に亘って目視することが可能である。また、 この構成によれば、吐水口から吐出された洗浄水の一部が、溜水部に向かう下向きの誘導流となるので、汚物を効果的に排水路へ誘導することができる。 The upper vertical inner wall surface where the spout opens is connected at right angles to the upper end surface of the rim and does not have an overhang portion over the entire circumference. Therefore, even from a viewpoint higher than the rim, the upper vertical inner wall surface It is possible to visually check the entire area over the entire circumference. Further, according to this configuration, a part of the washing water discharged from the spout becomes a downward guided flow toward the water reservoir, so that filth can be effectively guided to the drainage channel.

実施例１の水洗式大便器の平面図Top view of the flush toilet of Example 1 図１のＸ−Ｘ線断面図X-ray cross-sectional view of FIG. 図１のＹ−Ｙ線断面図YY line sectional view of FIG. 図１のＺ−Ｚ線断面図ZZ line sectional view of FIG.

本発明の水洗式大便器は、
前記吐水口が、前記上部鉛直内壁面の上下方向中間位置に開口していてもよい。
この構成によれば、上部鉛直内壁面に沿って一周した旋回流は、吐水口より低い位置を流れるのであるが、この一周した旋回流に対し、吐水口から吐出された洗浄水が上から覆い被さるので、洗浄水が上方へ飛散することを防止できる。 The flush toilet of the present invention
The spout may be opened at an intermediate position in the vertical direction of the upper vertical inner wall surface.
According to this configuration, the swirling flow that goes around along the upper vertical inner wall surface flows at a position lower than the spout, but the washing water discharged from the spout covers the swirling flow that goes around from above. Since it is covered, it is possible to prevent the washing water from splashing upward.

本発明の水洗式大便器は、
前記便鉢の内面には、前記上部鉛直内壁面の下端縁に沿って上方へ面するように棚面が形成されており、
前記吐水口の開口領域の最下端が、前記棚面より上方に設定されていてもよい。
この構成によれば、棚面上を旋回する洗浄水に対し、吐水口から吐出された洗浄水が上から覆い被さるので、棚面上の洗浄水が上方へ飛散することを防止できる。 The flush toilet of the present invention
A shelf surface is formed on the inner surface of the toilet bowl so as to face upward along the lower end edge of the upper vertical inner wall surface.
The lowermost end of the opening region of the spout may be set above the shelf surface.
According to this configuration, the washing water discharged from the spout covers the washing water swirling on the shelf surface from above, so that the washing water on the shelf surface can be prevented from scattering upward.

本発明の水洗式大便器は、
前記上部鉛直内壁面の平面視形状は、前端部と後端部の曲率半径が左右両側縁部の曲率半径よりも小さい形状をなしており、
前記吐水口が、前記上部鉛直内壁面の前端部又は後端部に開口していてもよい。
この構成によれば、吐水口から斜めに吐出された洗浄水が、吐出の直後に曲率半径の大きい側縁部に対して接線状に接触するので、水勢の低下が抑えられ、洗浄力の高い旋回流が生成される。 The flush toilet of the present invention
The plan view shape of the upper vertical inner wall surface has a shape in which the radius of curvature of the front end portion and the rear end portion is smaller than the radius of curvature of the left and right side edges.
The spout may be open at the front end or the rear end of the upper vertical inner wall surface.
According to this configuration, the cleaning water obliquely discharged from the spout comes into tangential contact with the side edge having a large radius of curvature immediately after the discharge, so that the decrease in water force is suppressed and the cleaning power is high. A swirling flow is generated.

＜実施例１＞
以下、本発明を具体化した実施例１を図１〜図４を参照して説明する。尚、以下の説明において、前後方向に関しては、図１における下側及び図２，３における右側を前側と定義する。また、左右方向に関しては、図１，４にあらわれる向きを、そのまま左側及び右側と定義する。本実施例１の水洗式大便器は、便鉢１０と、溜水部１７と、排水路１９と、給水部２４とを備えて構成されている。 <Example 1>
Hereinafter, Example 1 embodying the present invention will be described with reference to FIGS. 1 to 4. In the following description, the lower side in FIG. 1 and the right side in FIGS. 2 and 3 are defined as the front side in the front-rear direction. Regarding the left-right direction, the directions appearing in FIGS. 1 and 4 are defined as the left side and the right side as they are. The flush toilet of the first embodiment is configured to include a toilet bowl 10, a water reservoir 17, a drainage channel 19, and a water supply unit 24.

＜便鉢１０＞
便鉢１０は、上方へ開放された略擂り鉢状をなす。便鉢１０には、その上端縁部に沿うようにリム１１が形成されている。リム１１の上端面１１Ｓは、全周に亘って略水平であり、且つ全周に亘って一定高さで連続している。便鉢１０の内面は、汚物（図示省略）を受け止めるための鉢面１２となっている。鉢面１２のうち上端部領域は、全周に亘って連続する上部鉛直内壁面１３となっている。図２〜４に示すように、上部鉛直内壁面１３は、リム１１の上端面１１Ｓに対し、曲率半径の小さい弧状凸面１４を介して直角をなすように連なっている。上端面１１Ｓと上部鉛直内壁面１３は、弧状凸面１４面に対し滑らかに（接線状）に連なっている。 <Toilet bowl 10>
The toilet bowl 10 has a substantially bowl shape that is open upward. The toilet bowl 10 has a rim 11 formed along the upper end edge thereof. The upper end surface 11S of the rim 11 is substantially horizontal over the entire circumference and is continuous at a constant height over the entire circumference. The inner surface of the toilet bowl 10 is a bowl surface 12 for receiving filth (not shown). The upper end region of the pot surface 12 is an upper vertical inner wall surface 13 that is continuous over the entire circumference. As shown in FIGS. 2 to 4, the upper vertical inner wall surface 13 is connected to the upper end surface 11S of the rim 11 so as to form a right angle via an arcuate convex surface 14 having a small radius of curvature. The upper end surface 11S and the upper vertical inner wall surface 13 are smoothly (tangentially) connected to the arcuate convex surface 14 surface.

図２〜４に示すように、便鉢１０の平面視中心部を通る鉛直面に沿った切断面においては、上部鉛直内壁面１３の上端側領域がほぼ直線状をなし、弧状凸面１４は、凸面のみで構成されている。そして、上部鉛直内壁面１３と上端面１１Ｓが弧状凸面１４を介して直角に連なる形態は、便鉢１０（リム１１）の全周に亘って連続している。したがって、上部鉛直内壁面１３には、その全領域に亘り、便鉢１０の内部へ突き出すオーバーハング部や凸部や凹部が形成されていない。これにより、リム１１の上端面１１Ｓより高い位置から斜め下方に向けた視線で上部鉛直内壁面１３を見たときに、上部鉛直内壁面１３の全領域を目視することが可能である。 As shown in FIGS. 2 to 4, in the cut surface along the vertical plane passing through the center of the toilet bowl 10 in a plan view, the upper end side region of the upper vertical inner wall surface 13 is substantially linear, and the arcuate convex surface 14 is formed. It is composed only of convex surfaces. The form in which the upper vertical inner wall surface 13 and the upper end surface 11S are connected at right angles via the arcuate convex surface 14 is continuous over the entire circumference of the toilet bowl 10 (rim 11). Therefore, the upper vertical inner wall surface 13 is not formed with an overhang portion, a convex portion, or a concave portion protruding into the inside of the toilet bowl 10 over the entire region. As a result, when the upper vertical inner wall surface 13 is viewed from a position higher than the upper end surface 11S of the rim 11 diagonally downward, the entire area of the upper vertical inner wall surface 13 can be visually observed.

上部鉛直内壁面１３は、リム１１の略水平な上端面１１Ｓに対して直角をなしている、本実施例における「直角」は、厳密な９０°の角度に限定されるものではなく、９０°より少し小さい角度と、９０°よりも少し大きい角度も含む。したがって、上部鉛直内壁面１３の向きは、厳密な鉛直方向（上下方向）に限らず、鉛直方向に対して上端側が便鉢１０の内側へ僅かに倒れるように傾いた向き（つまり、リム１１の上端面１１Ｓと鋭角をなす向き）と、鉛直方向に対して上端側が便鉢１０の外側へ僅かに傾いた向き（つまり、リム１１の上端面１１Ｓと鈍角をなす向き）も含む。 The upper vertical inner wall surface 13 is perpendicular to the substantially horizontal upper end surface 11S of the rim 11. The “right angle” in this embodiment is not limited to an exact 90 ° angle, but is 90 °. Includes angles slightly smaller and angles slightly larger than 90 °. Therefore, the direction of the upper vertical inner wall surface 13 is not limited to the strict vertical direction (vertical direction), but is inclined so that the upper end side slightly tilts inward of the toilet bowl 10 with respect to the vertical direction (that is, the direction of the rim 11). It also includes a direction in which the upper end side is slightly inclined to the outside of the toilet bowl 10 with respect to the vertical direction (that is, a direction in which the upper end side is slightly inclined to the outside of the toilet bowl 10) (that is, a direction in which the upper end surface is oblique to the upper end surface 11S).

鉢面１２のうち上部鉛直内壁面１３よりも下方の領域は、全周に亘って連続する棚面１５となっている。棚面１５は、上部鉛直内壁面１３の下端に対し弧状凹面１６を介して滑らかに連続している。棚面１５は、全周に亘り、上方に面しており、上部鉛直内壁面１３から遠ざかるほど低くなるように傾斜している。棚面１５の水平面に対する傾斜角度は、周方向において一定ではなく部位によって異なるが、全周において４５°よりも小さい角度に設定されている。 The region of the pot surface 12 below the upper vertical inner wall surface 13 is a shelf surface 15 that is continuous over the entire circumference. The shelf surface 15 is smoothly continuous with the lower end of the upper vertical inner wall surface 13 via the arcuate concave surface 16. The shelf surface 15 faces upward over the entire circumference, and is inclined so as to become lower as the distance from the upper vertical inner wall surface 13 increases. The inclination angle of the shelf surface 15 with respect to the horizontal plane is not constant in the circumferential direction and varies depending on the part, but is set to an angle smaller than 45 ° in the entire circumference.

＜溜水部１７及び排水路１９＞
便鉢１０の下端部は、溜水部１７となっている。溜水部１７は、便鉢１０の左右方向（幅方向）における中央に配置されている。また、溜水部１７は、便鉢１０の前後方向における中央よりも後方に偏った位置に配置されている。溜水部１７の上端部内面は、全周に亘り、ほぼ鉛直な立壁１８で構成されている。この立壁１８の上端部は、棚面１５の内周縁部に滑らかに連続している。 <Reservoir 17 and drainage channel 19>
The lower end of the toilet bowl 10 is a water reservoir 17. The water reservoir 17 is arranged at the center of the toilet bowl 10 in the left-right direction (width direction). Further, the water reservoir 17 is arranged at a position biased to the rear of the center in the front-rear direction of the toilet bowl 10. The inner surface of the upper end portion of the water reservoir portion 17 is composed of a substantially vertical vertical wall 18 over the entire circumference. The upper end of the vertical wall 18 is smoothly continuous with the inner peripheral edge of the shelf surface 15.

図２に示すように、排水路１９は、溜水部１７に連なる上昇路２０と、上昇路２０の下流端（上端）に連なる下降路２１とを備えて構成されている。下降路２１は、トイレの床面に設けた排水管（図示省略）に接続されている。溜水部１７は、排水路の入口に位置する。排水路１９は、左右対称であり、便鉢１０の左右方向（幅方向）における中央に配置されている。 As shown in FIG. 2, the drainage channel 19 is configured to include an ascending path 20 connected to the water reservoir portion 17 and a descending path 21 connected to the downstream end (upper end) of the ascending path 20. The descending path 21 is connected to a drainage pipe (not shown) provided on the floor of the toilet. The water reservoir 17 is located at the entrance of the drainage channel. The drainage channel 19 is symmetrical and is arranged at the center of the toilet bowl 10 in the left-right direction (width direction).

洗浄前は、洗浄水が溜水として溜水部１７と上昇路２０に貯留されている。溜水部１７において溜水が静止しているときの液面を、溜水面２３と定義する。鉢面１２で受け止められた汚物や溜水部１７内に沈下した汚物は、鉢面１２に沿って旋回又は流下する洗浄水とともに、排水路１９を通って排出される。 Before cleaning, the cleaning water is stored in the water storage portion 17 and the ascending path 20 as pool water. The liquid level when the accumulated water is stationary in the water reservoir 17 is defined as the water reservoir surface 23. The filth received on the pot surface 12 and the filth settled in the water reservoir 17 are discharged through the drainage channel 19 together with the washing water swirling or flowing down along the pot surface 12.

＜給水部２４＞
給水部２４は、便鉢１０に洗浄水を供給するためのものであり、便鉢１０の上面部後方に隣接して形成されている。給水部２４の前端における左右方向中央部は、リム１１の後端部に連なっていて、給水部２４の上面とリム１１の上端面１１Ｓが面一状に連続している。図２，３に示すように、給水部２４は、上面が開放されて洗浄タンク等の給水口（図示省略）に連通するように形成された後部給水空間２５と、後部給水空間２５の前方に位置し、連通孔２７を介して後部給水空間２５に連通する前部給水空間２６とを備えて構成されている。 <Water supply unit 24>
The water supply unit 24 is for supplying wash water to the toilet bowl 10, and is formed adjacent to the rear of the upper surface portion of the toilet bowl 10. The central portion in the left-right direction at the front end of the water supply portion 24 is connected to the rear end portion of the rim 11, and the upper surface of the water supply portion 24 and the upper end surface 11S of the rim 11 are flush with each other. As shown in FIGS. 2 and 3, the water supply unit 24 is in front of the rear water supply space 25 and the rear water supply space 25 formed so that the upper surface is opened and communicates with the water supply port (not shown) of the washing tank or the like. It is located and is configured to include a front water supply space 26 that communicates with the rear water supply space 25 through a communication hole 27.

＜吐水口２８＞
便鉢１０の上端部（リム１１）には、給水部２４内に供給された洗浄水を、便鉢１０内に吐出するための吐水口２８が形成されている。吐水口２８は、上部鉛直内壁面１３と前部給水空間２６とを仕切る隔壁部２９を貫通した形態である。つまり、吐水口２８は、上部鉛直内壁面１３の後端部に位置し、前方に向かって開口している。 <Water spout 28>
A spout 28 for discharging the washing water supplied into the water supply unit 24 into the toilet bowl 10 is formed at the upper end portion (rim 11) of the toilet bowl 10. The water spout 28 has a form that penetrates a partition wall portion 29 that separates the upper vertical inner wall surface 13 and the front water supply space 26. That is, the spout 28 is located at the rear end of the upper vertical inner wall surface 13 and opens toward the front.

図４に示すように、吐水口２８の開口形状（正面視形状）は、全体として横長の方形をなし、四隅が弧状に成形されているとともに、上下非対称且つ左右非対称である。吐水口２８の開口縁を構成する４つの縁辺のうち、上縁辺３０は水平方向に延びている。右縁辺３１は鉛直方向に延びている。左縁辺３２は弧状をなしている。下縁辺３３は、水平ではなく、左方に向かって次第に高くなるように少し傾斜している。換言すると、吐水口２８の下縁辺３３は、便鉢１０の左側から中央に向かって下るように傾斜している。したがって、吐水口２８の高さ寸法は、右側から左側に向かって次第に小さくなっている。 As shown in FIG. 4, the opening shape (front view shape) of the spout 28 is a horizontally long square as a whole, the four corners are formed in an arc shape, and the water discharge port 28 is vertically asymmetrical and left-right asymmetrical. Of the four edges forming the opening edge of the spout 28, the upper edge 30 extends in the horizontal direction. The right edge 31 extends in the vertical direction. The left edge 32 has an arc shape. The lower edge 33 is not horizontal and is slightly inclined so as to gradually increase toward the left. In other words, the lower edge 33 of the spout 28 is inclined so as to descend from the left side of the toilet bowl 10 toward the center. Therefore, the height dimension of the spout 28 gradually decreases from the right side to the left side.

図１に示すように、前後方向において、吐水口２８は、その全体に亘り、溜水部１７の溜水面２３の後端よりも後方の領域に開口している。また、吐水口２８は、その全体が、便鉢１０の左右方向中央よりも左方の領域に開口している。そして、吐水口２８のうち左端部を除いた大部分の領域は、左右方向において溜水面２３と重なるように開口している。また、図４に示すように、吐水口２８の開口領域の最上端（上縁辺３０）は、上部鉛直内壁面１３の上端（弧状凸面１４の下端）よりも下方の位置に設定されている。吐水口２８の開口領域の最下端（下縁辺３３の右端）は、棚面１５よりも上方の位置に設定されている。 As shown in FIG. 1, in the front-rear direction, the water spout 28 is open to a region behind the rear end of the water storage surface 23 of the water storage portion 17 over the entire spout 28. Further, the entire spout 28 is opened in a region to the left of the center in the left-right direction of the toilet bowl 10. Most of the spout 28, excluding the left end, is open so as to overlap the water reservoir surface 23 in the left-right direction. Further, as shown in FIG. 4, the uppermost end (upper edge side 30) of the opening region of the spout 28 is set at a position lower than the upper end (lower end of the arcuate convex surface 14) of the upper vertical inner wall surface 13. The lowermost end of the opening region of the spout 28 (the right end of the lower edge 33) is set at a position above the shelf surface 15.

吐水口２８からは、洗浄水が便鉢１０内に吐出される。吐水口２８からの洗浄水の吐出方向は、上部鉛直内壁面１３に沿うような向きであり、平面視において反時計回り方向の向きである。洗浄水の吐出流量（単位時間当たりの吐水量）は、吐出開始時がほぼ最大であり、その後、徐々に減少し、吐出終了間際で最小となる。したがって、吐出開始から吐出終了間際までの間は、吐出された洗浄水が、上部鉛直内壁面１３の下端部及び棚面１５に接する旋回流３４となる。この旋回流３４は、上部鉛直内壁面１３の下端部に沿うように流れるので、便鉢１０（リム１１）の上方に飛散することはない。旋回流３４の旋回経路は、重力により次第に下方へ移動していき、溜水部１７に流入する。 Washing water is discharged into the toilet bowl 10 from the spout 28. The discharge direction of the washing water from the water discharge port 28 is a direction along the upper vertical inner wall surface 13, and is a counterclockwise direction in a plan view. The discharge flow rate of the washing water (the amount of water discharged per unit time) is substantially maximum at the start of discharge, then gradually decreases, and becomes minimum just before the end of discharge. Therefore, from the start of discharge to just before the end of discharge, the discharged wash water becomes a swirling flow 34 in contact with the lower end portion of the upper vertical inner wall surface 13 and the shelf surface 15. Since the swirling flow 34 flows along the lower end of the upper vertical inner wall surface 13, it does not scatter above the toilet bowl 10 (rim 11). The swirling path of the swirling flow 34 gradually moves downward due to gravity and flows into the water reservoir portion 17.

そして、吐出終了間際では、吐出した洗浄水が、溜水部１７に向かってほぼ鉛直下向きの誘導流３５となる。この吐出終了間際の下向きの誘導流３５は、棚面１５の後端部における旋回流３４に上から覆い被さるように流れ落ちる。したがって、棚面１５の後端部では、旋回流３４が誘導流３５によって下向きに誘導され、溜水部１７に流れ込む。溜水部１７は、排水路１９の入口に連通しているので、便鉢１０内の洗浄水と汚物は確実に排出される。 Then, just before the end of the discharge, the discharged wash water becomes an induced flow 35 that is substantially vertically downward toward the water storage portion 17. The downward induced flow 35 just before the end of discharge flows down so as to cover the swirling flow 34 at the rear end of the shelf surface 15 from above. Therefore, at the rear end of the shelf surface 15, the swirling flow 34 is guided downward by the guided flow 35 and flows into the water reservoir portion 17. Since the water reservoir 17 communicates with the entrance of the drainage channel 19, the washing water and filth in the toilet bowl 10 are surely discharged.

本実施例の水洗式大便器は、便鉢１０と、便鉢１０の内面上端部に形成され、便鉢１０の略水平な上端面１１Ｓの内周縁に対し、便鉢１０の全周に亘って直角に連なる上部鉛直内壁面１３とを有する。この上部鉛直内壁面１３には、洗浄水を吐出して上部鉛直内壁面１３に接する旋回流３４を生成する吐水口２８が開口している。吐水口２８が開口する上部鉛直内壁面１３は、全周に亘り、便鉢１０の水平な上端面１１Ｓと直角に連なっていてオーバーハング部を有していないので、リム１１の上端面１１Ｓより高い位置の視点からでも、上部鉛直内壁面１３の全領域を全周に亘って目視することが可能である。 The flush toilet of this embodiment is formed on the toilet bowl 10 and the upper end of the inner surface of the toilet bowl 10, and extends over the entire circumference of the toilet bowl 10 with respect to the inner peripheral edge of the substantially horizontal upper end surface 11S of the toilet bowl 10. It has an upper vertical inner wall surface 13 which is connected at a right angle. The upper vertical inner wall surface 13 is opened with a water discharge port 28 that discharges washing water to generate a swirling flow 34 in contact with the upper vertical inner wall surface 13. Since the upper vertical inner wall surface 13 through which the spout 28 opens is connected at right angles to the horizontal upper end surface 11S of the toilet bowl 10 and does not have an overhang portion over the entire circumference, it is more than the upper end surface 11S of the rim 11. Even from a high position, the entire area of the upper vertical inner wall surface 13 can be visually observed over the entire circumference.

また、吐水口２８は、上部鉛直内壁面１３の上下方向中間位置に開口している。この構成によれば、上部鉛直内壁面１３に沿って一周した旋回流３４は、吐水口２８より低い位置を流れるのであるが、この一周した旋回流３４に対し、吐水口２８から吐出された洗浄水が上から覆い被さるので、洗浄水が上方へ飛散することを防止できる。 Further, the water spout 28 is opened at an intermediate position in the vertical direction of the upper vertical inner wall surface 13. According to this configuration, the swirling flow 34 that goes around along the upper vertical inner wall surface 13 flows at a position lower than the water discharge port 28, but the cleaning that is discharged from the water spout 28 with respect to the swirling flow 34 that goes around. Since the water covers from above, it is possible to prevent the washing water from splashing upward.

また、便鉢１０の内面には、上部鉛直内壁面１３の下端縁に沿った上向きの棚面１５が全周に亘って連続して形成されており、吐水口２８の開口領域の最下端は、棚面１５より上方に設定されている。この構成によれば、棚面１５上を旋回する洗浄水に対し、吐水口２８から吐出された洗浄水が上から覆い被さるので、棚面１５上の洗浄水が上方へ飛散することを防止できる。 Further, on the inner surface of the toilet bowl 10, an upward shelf surface 15 along the lower end edge of the upper vertical inner wall surface 13 is continuously formed over the entire circumference, and the lowermost end of the opening region of the spout 28 is formed. , It is set above the shelf surface 15. According to this configuration, the washing water discharged from the spout 28 covers the washing water swirling on the shelf surface 15 from above, so that the washing water on the shelf surface 15 can be prevented from scattering upward. ..

また、上部鉛直内壁面１３の平面視形状は、前端部と後端部の曲率半径が左右両側縁部の曲率半径よりも小さい形状をなしている。即ち、長軸を前後方向に向けた略楕円形をなしている。そして、吐水口２８が、上部鉛直内壁面１３の後端部（つまり、曲率半径の小さい領域）に開口している。この構成によれば、吐水口２８から斜め前方に吐出された洗浄水は、吐出の直後に曲率半径の大きい側縁部に対して接線状に接触するので、洗浄水の水勢の低下が抑えられる。したがって、洗浄力の高い旋回流３４が生成される。 Further, the plan-view shape of the upper vertical inner wall surface 13 has a shape in which the radius of curvature of the front end portion and the rear end portion is smaller than the radius of curvature of the left and right side edge portions. That is, it has a substantially elliptical shape with the long axis oriented in the front-rear direction. The water spout 28 is opened at the rear end of the upper vertical inner wall surface 13 (that is, a region having a small radius of curvature). According to this configuration, the washing water discharged diagonally forward from the spout 28 comes into tangential contact with the side edge having a large radius of curvature immediately after the discharge, so that the decrease in the water force of the washing water can be suppressed. .. Therefore, a swirling flow 34 having high detergency is generated.

また、便鉢１０のうち前後方向における中央よりも後方の位置には、排水路１９に連なる溜水部１７が配されており、吐水口２８が、溜水部１７の溜水面２３よりも後方に配され、吐水口２８から吐出した洗浄水の一部が、下向きの誘導流３５を生成するようになっている。この構成によれば、吐水口２８から吐出された洗浄水の一部が、溜水部１７に向かう下向きの誘導流３５となるので、汚物を効果的に排水路１９へ誘導することができる。 Further, a water reservoir 17 connected to the drainage channel 19 is arranged at a position rearward of the center of the toilet bowl 10 in the front-rear direction, and the water spout 28 is behind the water reservoir surface 23 of the water reservoir 17. A part of the washing water discharged from the water spout 28 generates a downward guided flow 35. According to this configuration, a part of the washing water discharged from the water spout 28 becomes a downward guided flow 35 toward the water reservoir 17, so that filth can be effectively guided to the drainage channel 19.

＜他の実施例＞
本発明は上記記述及び図面によって説明した実施例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）上記実施例では、吐水口を便鉢（リム）の後端部に配置したが、吐水口は、便鉢の後端よりも前方の位置に配置してもよい。
（２）上記実施例では、吐水口の数を１つだけとしたが、吐水口は、異なる位置に複数配置してもよい。この場合、２つ目からの吐水口は、旋回流を生成する吐水口でなくてもよい。例えば、下方にのみ吐水する吐水口でもよい。
（３）上記実施例では、吐水口の開口領域の最下端を棚面より上方に設定したが、吐水口の開口領域の最下端が棚面と同じ高さであってもよい。
（４）上記実施例では、吐水口の全体が、便鉢の左右方向中央より左方の領域に開口しているが、吐水口の全体が便鉢の左右方向中央より右方の領域に開口してもよく、吐水口が便鉢の左右方向中央線を跨ぐように開口してもよい。
（５）上記実施例では、吐水口の全体が、溜水部の溜水面の後端より後方の領域に開口しているが、吐水口の全体が溜水部の溜水面の前端より前方の領域に開口してもよく、吐水口の開口領域の一部が、前後方向において溜水面と重なるような位置関係であってもよい。
（６）上記実施例では、吐水口を前方から見た開口形状が左右非対称であるが、吐水口を前方から見た開口形状は左右対称であってもよい。 <Other Examples>
The present invention is not limited to the examples described by the above description and drawings, and for example, the following examples are also included in the technical scope of the present invention.
(1) In the above embodiment, the spout is arranged at the rear end of the toilet bowl (rim), but the spout may be arranged at a position in front of the rear end of the toilet bowl.
(2) In the above embodiment, the number of spouts is only one, but a plurality of spouts may be arranged at different positions. In this case, the spout from the second spout does not have to be a spout that generates a swirling flow. For example, a spout that spouts water only downward may be used.
(3) In the above embodiment, the lowermost end of the opening area of the spout is set above the shelf surface, but the lowermost end of the opening area of the spout may be the same height as the shelf surface.
(4) In the above embodiment, the entire spout is opened in the area to the left of the center of the toilet bowl in the left-right direction, but the entire spout is opened in the area to the right of the center of the toilet bowl in the left-right direction. Alternatively, the spout may be opened so as to straddle the center line in the left-right direction of the toilet bowl.
(5) In the above embodiment, the entire spout is opened in the region behind the rear end of the water reservoir surface of the water reservoir, but the entire water spout is in front of the front end of the water reservoir surface of the water reservoir. It may be opened in the area, or a part of the opening area of the spout may be in a positional relationship so as to overlap the water reservoir surface in the front-rear direction.
(6) In the above embodiment, the opening shape when the spout is viewed from the front is asymmetrical, but the opening shape when the spout is viewed from the front may be symmetrical.

１０…便鉢
１１…リム
１１Ｓ…リムの上端面
１３…上部鉛直内壁面
１５…棚面
１７…溜水部
１９…排水路
２３…溜水面
２８…吐水口
３４…旋回流
３５…誘導流 10 ... Toilet bowl 11 ... Rim 11S ... Upper end surface of rim 13 ... Upper vertical inner wall surface 15 ... Shelf surface 17 ... Reservoir 19 ... Drainage channel 23 ... Reservoir 28 ... Spout 34 ... Swirling flow 35 ... Guided flow

Claims (3)

便鉢と、
前記便鉢の上端縁部に形成されたリムと、
前記便鉢の内面上端部に形成され、前記便鉢の全周に亘って前記リムの上端面内周縁部に連なる上部鉛直内壁面と、
前記上部鉛直内壁面に開口し、洗浄水を吐出して平面視において前記上部鉛直内壁面に接するように旋回する旋回流を生成する吐水口と、
前記便鉢のうち前後方向における中央よりも後方の位置に配され、排水路に連なる溜水部とを備え、
前記吐水口が、前記溜水部の溜水面よりも後方に配され、且つ左右方向において前記溜水部の溜水面と重なるように開口し、
前記吐水口から吐出した洗浄水の一部が、下向きの誘導流を生成し、
前記便鉢の後端部では、前記上部鉛直内壁面に沿うように旋回してきた前記旋回流が、前記誘導流によって下向きに誘導されて前記溜水部に流れ込むようになっており、
前記上部鉛直内壁面の前端部は、前記リムの上端面に対して直角をなす鉛直方向の向き、及び前記リムの上端面に対して鈍角をなし、鉛直方向に対して上端側が前記便鉢の外側へ僅かに傾いた向きのいずれか一方の向きである水洗式大便器。 Toilet bowl and
With the rim formed on the upper edge of the toilet bowl,
An upper vertical inner wall surface formed on the upper end of the inner surface of the toilet bowl and connected to the inner peripheral edge of the upper end surface of the rim over the entire circumference of the toilet bowl.
A spout that opens in the upper vertical inner wall surface, discharges washing water, and generates a swirling flow that swirls so as to be in contact with the upper vertical inner wall surface in a plan view .
It is arranged at a position behind the center in the front-rear direction of the toilet bowl, and is provided with a water reservoir connected to the drainage channel.
The spout is arranged behind the water reservoir surface of the water reservoir and is opened so as to overlap the water reservoir surface of the water reservoir in the left-right direction.
A part of the washing water discharged from the spout generates a downward induced flow, and
At the rear end of the toilet bowl, the swirling flow swirling along the upper vertical inner wall surface is guided downward by the guided flow and flows into the water reservoir.
The front end of the upper vertical inner wall surface has an obtuse angle with respect to the upper end surface of the rim and an obtuse angle with respect to the upper end surface of the rim, and the upper end side with respect to the vertical direction is the toilet bowl. A flush-type toilet bowl that is oriented in one of the directions slightly tilted outward. 便鉢と、
前記便鉢の上端縁部に形成されたリムと、
前記便鉢の内面上端部に形成され、前記便鉢の全周に亘って前記リムの上端面内周縁部に連なる上部鉛直内壁面と、
前記上部鉛直内壁面に開口し、洗浄水を吐出して平面視において前記上部鉛直内壁面に接するように旋回する旋回流を生成する吐水口と、
前記便鉢のうち前後方向における中央よりも後方の位置に配され、排水路に連なる溜水部とを備え、
前記吐水口が、前記溜水部の溜水面よりも後方に配され、
前記吐水口から吐出した洗浄水の一部が、下向きの誘導流を生成し、
前記便鉢の後端部では、前記上部鉛直内壁面に沿うように旋回してきた前記旋回流が、前記誘導流によって下向きに誘導されて前記溜水部に流れ込むようになっており、
前記吐水口の一部のみが、左右方向において前記溜水部の溜水面と同じ領域に開口し、
前記吐水口の左右方向における一方の端部が、前記溜水面に対して左右方向へ外れた領域に開口し、
前記吐水口から、前記旋回流と前記誘導流が吐出される水洗式大便器。 Toilet bowl and
With the rim formed on the upper edge of the toilet bowl,
An upper vertical inner wall surface formed on the upper end of the inner surface of the toilet bowl and connected to the inner peripheral edge of the upper end surface of the rim over the entire circumference of the toilet bowl.
A spout that opens in the upper vertical inner wall surface, discharges washing water, and generates a swirling flow that swirls so as to be in contact with the upper vertical inner wall surface in a plan view .
It is arranged at a position behind the center in the front-rear direction of the toilet bowl, and is provided with a water reservoir connected to the drainage channel.
The spout is arranged behind the water reservoir surface of the water reservoir.
A part of the washing water discharged from the spout generates a downward induced flow, and
At the rear end of the toilet bowl, the swirling flow swirling along the upper vertical inner wall surface is guided downward by the guided flow and flows into the water reservoir.
Only a part of the water spout opens in the same area as the water collecting surface of the water collecting part in the left-right direction.
One end of the spout in the left-right direction opens in a region deviated from the water reservoir surface in the left-right direction.
A flush toilet in which the swirling flow and the induced flow are discharged from the spout. 前記上部鉛直内壁面の平面視形状は、前端部と後端部の曲率半径が左右両側縁部の曲率半径よりも小さい形状をなしており、
前記吐水口が前記上部鉛直内壁面の後端部に開口している請求項１及び請求項２のいずれか１項に記載の水洗式大便器。 The plan view shape of the upper vertical inner wall surface has a shape in which the radius of curvature of the front end portion and the rear end portion is smaller than the radius of curvature of the left and right side edges.
The flush toilet according to any one of claims 1 and 2, wherein the spout is opened at the rear end of the upper vertical inner wall surface.
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