JP7240837B2 - flush toilet - Google Patents

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JP7240837B2
JP7240837B2 JP2018152214A JP2018152214A JP7240837B2 JP 7240837 B2 JP7240837 B2 JP 7240837B2 JP 2018152214 A JP2018152214 A JP 2018152214A JP 2018152214 A JP2018152214 A JP 2018152214A JP 7240837 B2 JP7240837 B2 JP 7240837B2
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toilet bowl
water
flow
flush
upward
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JP2020026679A (en
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嵩正 伊奈
拓真 佐藤
直人 米津
舞子 中川
秀和 三宅
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Lixil Corp
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Lixil Corp
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Priority to JP2018152214A priority Critical patent/JP7240837B2/en
Priority to CN201910728128.2A priority patent/CN110820885A/en
Priority to US16/539,903 priority patent/US20200048888A1/en
Priority to DE102019121763.6A priority patent/DE102019121763A1/en
Publication of JP2020026679A publication Critical patent/JP2020026679A/en
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Description

本発明は、水洗大便器に関する。 The present invention relates to flush toilets.

特許文献1には、便鉢部と、便鉢部の上端側部分を形成するリム部と、便鉢部内に洗浄水を吐き出すことによって旋回流を形成する吐水部と、を備えた水洗大便器が記載されている。 Patent Document 1 discloses a flush toilet comprising a toilet bowl, a rim forming an upper end portion of the toilet bowl, and a water discharger forming a swirling flow by discharging wash water into the toilet bowl. is described.

特開2015-169004号公報JP 2015-169004 A

リム部の内周面は、通常、便鉢部の前面部や後面部において、便鉢部の側面部と比べて平面視での曲率半径が小さいため、それらを伝う洗浄水には大きい遠心力が付与される。このため、便鉢部の前面部や後面部では、この遠心力により上昇しようとする洗浄水が便鉢部外に飛び出し易くなる。この対策として、通常、リム部の内周面に形成したオーバーハング面により、その洗浄水の動きを規制する手法が採られている(特許文献1参照)。本発明者は、この対策を図るうえで、新たな手法があるとの認識を得た。 The inner peripheral surface of the rim generally has a smaller radius of curvature in plan view than the side surfaces of the toilet bowl at the front and rear surfaces of the toilet bowl. is given. Therefore, at the front and rear surfaces of the toilet bowl, the centrifugal force makes it easier for the wash water, which is about to rise, to flow out of the toilet bowl. As a countermeasure for this, a method is usually adopted in which an overhang surface formed on the inner peripheral surface of the rim portion is used to restrict the movement of the wash water (see Patent Document 1). The inventor of the present invention has recognized that there is a new technique for this countermeasure.

本発明のある態様は、このような課題に鑑みてなされ、その目的の1つは、洗浄水の便鉢部外への飛び出しを抑制できる技術を提供することにある。 An aspect of the present invention has been made in view of such a problem, and one of the purposes thereof is to provide a technique capable of suppressing flush water from jumping out of the toilet bowl.

前述の課題を解決するための本発明の第1態様は水洗大便器である。第1態様の水洗大便器は、鉢状の汚物受け面を有する便鉢部と、前記便鉢部の上端側部分を形成するリム部と、前記便鉢部内に洗浄水を吐き出すことによって旋回流を形成する吐水部と、を備え、前記便鉢部の前面部及び後面部のうちの一方の面部には、前記便鉢部の前後方向の一端部が設けられ、前記吐水部から前記一端部に至る洗浄水経路上に設けられ、前記洗浄水の少なくとも一部を上方に誘導する上方誘導部を備える。 A first aspect of the present invention for solving the aforementioned problems is a flush toilet. The flush toilet of the first aspect comprises a toilet bowl portion having a bowl-shaped waste receiving surface, a rim portion forming an upper end portion of the toilet bowl portion, and a swirling flow by discharging wash water into the toilet bowl portion. one end of the toilet bowl in the front-rear direction is provided on one of the front surface and the rear surface of the toilet bowl; and an upward guiding part that is provided on the washing water path leading to the washing water and guides at least part of the washing water upward.

第1態様によれば、洗浄水経路上において、上方誘導部により上方に誘導してから自重により下方に向かう誘導流を形成できる。このため、このような誘導流が形成されない場合と比べ、便鉢部の一方の面部を伝う水流の上向きの速度成分を低減でき、その一方の面部からの洗浄水の飛び出しを抑制できる。 According to the first aspect, it is possible to form a guided flow that is guided upward by the upward guide portion and then directed downward by its own weight on the wash water path. Therefore, compared to the case where such an induction flow is not formed, it is possible to reduce the upward velocity component of the water flow that travels along the one surface of the toilet bowl, and to suppress the washing water from jumping out of the one surface.

前述の課題を解決するための本発明の他の態様は水洗大便器である。他の態様の水洗大便器は、鉢状の汚物受け面を有する便鉢部と、前記便鉢部の上端側部分を形成するリム部と、前記便鉢部内に洗浄水を吐き出すことによって旋回流を形成する吐水部と、を備える水洗大便器であって、前記便鉢部の前面部及び後面部のうちの一方の面部には、前記便鉢部の前後方向の一端部が設けられ、本水洗大便器は、前記吐水部から前記一端部に至る洗浄水経路上にて洗浄水の少なくとも一部を上方に誘導することで、前記洗浄水経路上にて上向きに流れてから下向きに流れる誘導流を形成するように構成される。 Another aspect of the present invention for solving the aforementioned problems is a flush toilet. Another embodiment of a flush toilet includes a toilet bowl portion having a bowl-shaped waste receiving surface, a rim portion forming an upper end portion of the toilet bowl portion, and a swirling flow by discharging wash water into the toilet bowl portion. and a flush toilet comprising a water discharge part forming a The flush toilet guides at least part of the flush water upward on the flush water path extending from the water discharge section to the one end, thereby guiding the flush water to flow upward and then downward on the flush water path. configured to form a flow;

この態様によれば、洗浄水経路上に誘導流が形成されない場合と比べ、便鉢部の一方の面部を伝う水流の上向きの速度成分を低減でき、その一方の面部からの洗浄水の飛び出しを抑制できる。 According to this aspect, compared to the case where no guided flow is formed on the flushing water path, the upward velocity component of the water flow that runs along the one surface of the toilet bowl can be reduced, and flushing of the flushing water from the one surface can be reduced. can be suppressed.

第1実施形態の便器装置を機能ブロックと併せて示す説明図である。It is explanatory drawing which shows the toilet bowl apparatus of 1st Embodiment together with a functional block. 図1のA-A断面図である。FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; 図1のB-B断面図である。FIG. 2 is a cross-sectional view taken along the line BB of FIG. 1; 第1実施形態の水洗大便器の平面図である。1 is a plan view of the flush toilet bowl of the first embodiment; FIG. 図5(a)は、図6のC-C断面図であり、図5(b)は、図6のD-D断面図である。5(a) is a sectional view taken along line CC in FIG. 6, and FIG. 5(b) is a sectional view taken along line DD in FIG. 図2の一部の拡大図である。3 is an enlarged view of a portion of FIG. 2; FIG. 図7(a)~図7(c)のそれぞれは、図6のI-I、II-II、III-IIIの断面図である。7(a) to 7(c) are cross-sectional views taken along II, II-II, and III-III in FIG. 6, respectively. 図8(a)、図8(b)のそれぞれは、図6のIV-IV、V-Vの断面図である。8A and 8B are cross-sectional views taken along IV-IV and VV in FIG. 6, respectively. 第1実施形態の水洗大便器内での洗浄水の流れ方を示す図である。FIG. 4 is a diagram showing how flush water flows in the flush toilet of the first embodiment; 第1実施形態の水洗大便器を左上側の後方から見た図である。It is the figure which looked at the flush toilet bowl of 1st Embodiment from the upper left rear. 第1実施形態の水洗大便器の一部を左側から見た断面図である。Fig. 2 is a cross-sectional view of a portion of the flush toilet of the first embodiment viewed from the left; 図1のE-E断面図である。FIG. 2 is a cross-sectional view taken along line EE of FIG. 1; 図1のF-F断面図である。FIG. 2 is a cross-sectional view taken along line FF of FIG. 1; 洗浄水に作用する遠心力の説明図である。FIG. 4 is an explanatory diagram of centrifugal force acting on washing water; 第2実施形態の水洗大便器の一部を示す側面断面図である。It is a side sectional view showing a part of the flush toilet bowl of the second embodiment.

以下、実施形態、変形例では、同一の構成要素に同一の符号を付し、重複する説明を省略する。各図面では、説明の便宜のため、構成要素の一部を適宜省略したり、構成要素の寸法を適宜拡大、縮小して示す。図面は符号の向きに合わせて見るものとする。 Hereinafter, in the embodiments and modified examples, the same constituent elements are denoted by the same reference numerals, and overlapping descriptions are omitted. In each drawing, for convenience of explanation, some of the constituent elements are omitted as appropriate, or the dimensions of the constituent elements are shown enlarged or reduced as appropriate. The drawings should be viewed according to the orientation of the symbols.

(第1の実施の形態)
第1実施形態の水洗大便器10(以下、単に大便器10という)を用いた便器装置12の概要を説明する。図1は、便器装置12を機能ブロックと併せて示す説明図である。図1は、大便器10の平面図でもある。図2は、図1のA-A断面図であり、図3は、図1のB-B断面図である。
(First embodiment)
An outline of a toilet device 12 using the flush toilet 10 (hereinafter simply referred to as the toilet 10) of the first embodiment will be described. FIG. 1 is an explanatory diagram showing the toilet device 12 together with functional blocks. 1 is also a plan view of the toilet bowl 10. FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a sectional view taken along line BB in FIG.

以下、大便器10の前後方向X、左右方向Y及び上下方向Zを用いて説明する。これら方向軸は直交座標系を構成し、大便器10に取り付けられる便座(不図示)に通常の姿勢で座る着座者の向きに対応する。前後方向X、左右方向Yは水平方向、上下方向Zは鉛直方向である。 Hereinafter, the front-rear direction X, the left-right direction Y, and the up-down direction Z of the toilet bowl 10 will be used for description. These directional axes constitute a Cartesian coordinate system and correspond to the orientation of an occupant sitting in a normal posture on a toilet seat (not shown) attached to the toilet bowl 10 . The front-back direction X and the left-right direction Y are horizontal directions, and the up-down direction Z is a vertical direction.

便器装置12は、大便器10の他に、大便器10に洗浄水を供給する洗浄水供給装置14を備える。洗浄水供給装置14は、たとえば、貯水タンクを用いて構成されるが、フラッシュバルブ等を用いて構成されてもよい。 The toilet device 12 includes, in addition to the toilet bowl 10 , a flush water supply device 14 that supplies flush water to the toilet bowl 10 . The washing water supply device 14 is configured using, for example, a water storage tank, but may be configured using a flush valve or the like.

本実施形態の大便器10は洋風大便器である。本実施形態の大便器10は陶器を素材とするが、樹脂等を素材としてもよい。大便器10は、便鉢部16と、便鉢部16の底部に接続される便器排水路18と、を備える。大便器10の上面部には、局部洗浄装置等の機械装置(不図示)の一部が収まる凹部20が形成される。便器排水路18は、便鉢部16内から下水側水路に排出される汚物や水の通り道となる。 The toilet bowl 10 of this embodiment is a Western-style toilet bowl. Although the toilet bowl 10 of the present embodiment is made of pottery, it may be made of resin or the like. The toilet bowl 10 includes a toilet bowl portion 16 and a toilet drainage channel 18 connected to the bottom portion of the toilet bowl portion 16 . A concave portion 20 is formed on the upper surface of the toilet bowl 10 to accommodate a part of a mechanical device (not shown) such as a private cleaning device. The toilet drainage channel 18 serves as a passage for filth and water discharged from the toilet bowl portion 16 to the sewage channel.

便鉢部16は、汚物を受けるための鉢状の汚物受け面24と、便鉢部16の上端側部分を形成するリム部26とを有する。リム部26の内周面は、便鉢部16の上端内縁部16aから汚物受け面24の外周端部24aまでの範囲に設けられる。以下、便鉢部16の周方向、径方向を用いて説明する。「周方向」は、平面視において、便鉢部16の上端内縁部16aの中心Cp周りを回る方向をいい、「径方向」は、その中心Cpを通る鉛直線に直交する方向をいう。 The toilet bowl portion 16 has a bowl-shaped waste receiving surface 24 for receiving waste, and a rim portion 26 forming the upper end portion of the toilet bowl portion 16 . The inner peripheral surface of the rim portion 26 is provided in a range from the upper inner edge portion 16 a of the toilet bowl portion 16 to the outer peripheral end portion 24 a of the waste receiving surface 24 . Hereinafter, the circumferential direction and the radial direction of the toilet bowl portion 16 will be described. The "circumferential direction" refers to the direction around the center Cp of the upper inner edge portion 16a of the toilet bowl 16 in plan view, and the "radial direction" refers to the direction perpendicular to the vertical line passing through the center Cp.

便鉢部16は、汚物受け面24の下端縁部24bから下方に窪む溜水部28を有する。溜水部28は、便鉢部16の底部を形成するとともに有底状をなす。溜水部28の底部には便器排水路18の入口18aが開口する。溜水部28には封水の一部となる溜水(不図示)が溜められる。 The toilet bowl portion 16 has a water storage portion 28 recessed downward from the lower edge portion 24b of the filth receiving surface 24 . The water storage portion 28 forms the bottom portion of the toilet bowl portion 16 and has a bottomed shape. The inlet 18a of the toilet drainage channel 18 opens at the bottom of the water storage portion 28. As shown in FIG. The pooled water portion 28 stores pooled water (not shown) that forms part of the sealed water.

図4は、大便器10の他の平面図である。リム部26の内周面は、平面視において、前端を含む前側領域30Fと、後端を含む後側領域30Bと、前側領域30Fと後側領域30Bを繋ぐ左右の中間領域30Sとを有する。前側領域30Fは、平面視において、第1範囲R1内の曲率半径の曲面状をなし、後側領域30Bは、第2範囲R2内の曲率半径の曲面状をなす。中間領域30Sは、第1範囲R1や第2範囲R2の曲率半径より大きい第3範囲R3内の曲率半径の曲面状をなす。たとえば、第1範囲R1は70mm~120mm、第2範囲R2は100mm~130mm、第3範囲R3は200mm~530mmである。このようにリム部26の内周面は、平面視において、前側領域30Fと後側領域30Bでの曲率半径が中間領域30Sでの曲率半径より小さいオーバル状をなす。なお、第1範囲R1と第2範囲R2は、第3範囲R3より小さい曲率半径であればよく、それらの間での大小関係は問わない。 FIG. 4 is another plan view of the toilet bowl 10. FIG. The inner peripheral surface of the rim portion 26 has, in plan view, a front region 30F including a front end, a rear region 30B including a rear end, and left and right intermediate regions 30S connecting the front region 30F and the rear region 30B. The front region 30F has a curved surface with a radius of curvature within the first range R1 in plan view, and the rear region 30B has a curved surface with a radius of curvature within the second range R2. The intermediate region 30S has a curved surface with a radius of curvature within a third range R3 that is larger than the radius of curvature of the first range R1 and the second range R2. For example, the first range R1 is 70 mm to 120 mm, the second range R2 is 100 mm to 130 mm, and the third range R3 is 200 mm to 530 mm. In this manner, the inner peripheral surface of the rim portion 26 has an oval shape in which the radius of curvature of the front region 30F and the rear region 30B is smaller than the radius of curvature of the intermediate region 30S in plan view. It should be noted that the first range R1 and the second range R2 only need to have curvature radii smaller than the third range R3, and the magnitude relationship between them does not matter.

以下、便鉢部16を四つに区分して説明する。詳しくは、便鉢部16の左右両側に設けられる一対の側面部22R、22Lと、便鉢部16の前側に設けられる前面部22Fと、便鉢部16の後側に設けられる後面部22Bとに便鉢部16を区分する。一対の側面部22R、22Lには、左右一方側となる右側の右側面部22Rと、左右他方側となる左側の左側面部22Lとが含まれる。 Hereinafter, the toilet bowl portion 16 will be described by dividing it into four parts. Specifically, a pair of side surface portions 22R and 22L provided on the left and right sides of the toilet bowl portion 16, a front surface portion 22F provided on the front side of the toilet bowl portion 16, and a rear surface portion 22B provided on the rear side of the toilet bowl portion 16. The toilet bowl part 16 is divided into . The pair of side surface portions 22R and 22L includes a right side surface portion 22R that is one of the left and right sides and a left left side surface portion 22L that is the other side of the left and right sides.

これらは、次の等分線Lb1~Lb3と左右中心線Lcにより区分される。等分線Lb1~Lb3には、平面視にて、便鉢部16の内面部分の最大前後寸法Laを四等分する三つの等分線Lb1~Lb3のうち、最も前側の前側等分線Lb1と、最も後側の後側等分線Lb3が含まれる。左右中心線Lcは、平面視にて、便鉢部16の内面部分の最大左右寸法を二等分する等分線をいう。等分線Lb1~Lb3は左右方向Yに沿って延び、左右中心線Lcは前後方向Xに沿って延びる。 These are divided by the following equal dividing lines Lb1 to Lb3 and the left and right center line Lc. Among the three equal dividing lines Lb1 to Lb3 that divide the maximum front-to-rear dimension La of the inner surface portion of the toilet bowl portion 16 into quarters in a plan view, the equal dividing lines Lb1 to Lb3 are the front equal dividing line Lb1 on the most front side. and the rearmost equal dividing line Lb3. The left-right center line Lc is an equal dividing line that bisects the maximum left-right dimension of the inner surface portion of the toilet bowl portion 16 in a plan view. The equal dividing lines Lb1 to Lb3 extend along the left-right direction Y, and the left-right center line Lc extends along the front-rear direction X.

一対の側面部22R、22Lは、前側等分線Lb1と後側等分線Lb3の間にあり、前面部22Fは、前側等分線Lb1より前側にあり、後面部22Bは、後側等分線Lb3より後側にある。右側面部22Rは、左右中心線Lcより右側にあり、左側面部22Lは、左右中心線Lcより左側にある。 The pair of side portions 22R and 22L are between the front equal dividing line Lb1 and the rear equal dividing line Lb3. It is on the rear side of line Lb3. The right side portion 22R is located on the right side of the horizontal center line Lc, and the left side portion 22L is located on the left side of the horizontal center line Lc.

図1~図3を参照する。リム部26の内周面には開口部32が形成される。本実施形態の開口部32は便鉢部16の左右一方側の側面部(右側面部22R)のみに形成され、左右他方側の側面部(左側面部22L)や、前面部22F及び後面部22Bには形成されない。 Please refer to FIGS. 1-3. An opening 32 is formed in the inner peripheral surface of the rim portion 26 . The opening 32 of the present embodiment is formed only on one side (right side 22R) of the toilet bowl 16, and is formed on the other side (left side 22L), the front 22F and the rear 22B. is not formed.

リム部26の内周面には、便鉢部16の前面部22F及び後面部22Bのうちの一方の面部22Xにおいて、便鉢部16の上端内縁部16aから汚物受け面24の外周端部24aまでオーバーハング面が形成されることなく連続する連続面40が設けられる。本明細書でのオーバーハング面とは、鉛直面に対する傾斜角度が60°以上となる下向きの面であって、吐水口44(後述する)とは異なる箇所に形成される面をいう。ここでの「一方の面部22X」とは、本実施形態では便鉢部16の前面部22Fをいう。この一方の面部22Xには、便鉢部16の前後方向Xの一端部16bとなる便鉢部16の前端部が設けられる。 On the inner peripheral surface of the rim portion 26 , at one surface portion 22 X of the front surface portion 22 F and the rear surface portion 22 B of the toilet bowl portion 16 , the inner edge portion 16 a of the upper end of the toilet bowl portion 16 to the outer peripheral edge portion 24 a of the waste receiving surface 24 . A continuous surface 40 is provided that continues without forming an overhang surface. The term "overhang surface" as used herein refers to a downward surface having an inclination angle of 60° or more with respect to the vertical plane, and is formed at a location different from the spout 44 (described later). Here, "one surface portion 22X" refers to the front surface portion 22F of the toilet bowl portion 16 in this embodiment. A front end portion of the toilet bowl portion 16, which is one end portion 16b of the toilet bowl portion 16 in the front-rear direction X, is provided on the one surface portion 22X.

本実施形態の連続面40は、開口部32以外の箇所にて、便鉢部16の全周に亘る範囲でリム部26の内周面に設けられる。詳しくは、連続面40は、便鉢部16の前面部22F、後面部22B及び左側面部22Lの全部の周方向範囲に設けられる。連続面40は、開口部32以外の箇所にて、便鉢部16の右側面部22Rの全部の周方向範囲に設けられる。 The continuous surface 40 of the present embodiment is provided on the inner peripheral surface of the rim portion 26 over the entire circumference of the toilet bowl portion 16 at locations other than the opening portion 32 . Specifically, the continuous surface 40 is provided in the entire circumferential range of the front surface portion 22</b>F, the rear surface portion 22</b>B and the left side surface portion 22</b>L of the toilet bowl portion 16 . The continuous surface 40 is provided in the entire circumferential range of the right side surface portion 22R of the toilet bowl portion 16 at locations other than the opening portion 32 .

本実施形態の連続面40は、便鉢部16の上端内縁部16aから下方に向かうにつれて、徐々に径方向内側に延びるように設けられる。これにより、下方に向かう途中で径方向外側に延びる箇所が設けられる場合と比べ、連続面40に付いた汚れを目視により把握し易くなり、清掃作業の容易化を図れる。同様の観点から、連続面40は、便鉢部16の上端内縁部16aから実質的に鉛直下方に向かって延びるように設けられてもよい。この他にも、連続面40は、下方に向かうにつれて径方向内側に延びる部位と、実質的に鉛直下方に向かって延びる部位との組み合わせでもよい。本明細書での「実質的」とは、言及している条件を厳密に満たす場合に限らず、寸法公差や製造誤差等の誤差の分だけ位置がずれる場合も含まれる。 The continuous surface 40 of the present embodiment is provided so as to gradually extend radially inward from the upper inner edge portion 16a of the toilet bowl portion 16 toward the downward direction. As a result, compared to the case where a portion extending radially outward is provided on the way downward, dirt attached to the continuous surface 40 can be visually recognized more easily, and cleaning work can be facilitated. From a similar point of view, the continuous surface 40 may be provided so as to extend substantially vertically downward from the upper inner edge portion 16 a of the toilet bowl portion 16 . Alternatively, the continuous surface 40 may be a combination of a portion extending radially inward as it goes downward and a portion extending substantially vertically downward. The term "substantially" as used in this specification is not limited to the case where the mentioned conditions are strictly satisfied, but also includes the case where the position is shifted by an error such as a dimensional tolerance or a manufacturing error.

大便器10は、便鉢部16内に洗浄水を吐き出すことによって旋回流Fa(後述の図9参照)を形成する吐水部42を備える。吐水部42は、便鉢部16の開口部32を通して便鉢部16内に洗浄水を吐き出す。本実施形態の吐水部42は開口部32の奥側に設けられ、平面視にて外部に露出しない位置に設けられる。旋回流Faは、便鉢部16の一方の面部22X(前面部22F)に設けられる便鉢部16の前後方向Xの一端部16bを経由してから、便鉢部16の前面部22F及び後面部22Bのうち他方の面部に設けられる便鉢部16の他端部16cを経由する。本実施形態での他端部16cは便鉢部16の後端部である。 The toilet bowl 10 includes a water discharger 42 that discharges cleansing water into the toilet bowl 16 to form a swirling flow Fa (see FIG. 9 to be described later). The water discharger 42 discharges cleansing water into the toilet bowl 16 through the opening 32 of the toilet bowl 16 . The water discharger 42 of the present embodiment is provided on the back side of the opening 32 and is provided at a position not exposed to the outside in plan view. The swirling flow Fa passes through one end portion 16b in the front-rear direction X of the toilet bowl portion 16 provided on one surface portion 22X (front surface portion 22F) of the toilet bowl portion 16, and then flows through the front surface portion 22F of the toilet bowl portion 16 and the rear surface portion 22F. It passes through the other end portion 16c of the toilet bowl portion 16 provided on the other surface portion of the surface portion 22B. The other end portion 16 c in this embodiment is the rear end portion of the toilet bowl portion 16 .

大便器10は、図2に示すように、便器排水路18の下流側に向けて洗浄水を吐き出すジェット吐水口41を備える。本実施形態のジェット吐水口41は大便器10に取り付けられるジェットノズル43の先端部に形成される。 As shown in FIG. 2, the toilet bowl 10 has a jet spout 41 that spouts cleansing water toward the downstream side of the toilet drainage channel 18 . The jet spout 41 of this embodiment is formed at the tip of a jet nozzle 43 attached to the toilet bowl 10 .

図5は、図1の一部を示す平面断面図である。図5(a)は、後述の図6のC-C断面図、図5(b)は、図6のD-D断面図である。吐水部42は、リム部26の内周面に開口する吐水口44と、洗浄水供給装置14から供給された洗浄水を吐水口44に導く通水路46とを有する。本実施形態の吐水口44は、前方に向けて開放しており、便鉢部16内に旋回流Faの旋回方向Dtとなる周方向の一方側(図5の紙面で反時計回り方向)に向けて洗浄水を吐き出す。 5 is a plan sectional view showing a part of FIG. 1. FIG. 5(a) is a cross-sectional view taken along line CC of FIG. 6, and FIG. 5(b) is a cross-sectional view taken along line DD of FIG. The water discharger 42 has a water discharge port 44 that opens to the inner peripheral surface of the rim portion 26 and a water conduit 46 that guides the cleansing water supplied from the cleansing water supply device 14 to the water discharge port 44 . The water discharge port 44 of the present embodiment is open toward the front, and the water discharge port 44 in the toilet bowl portion 16 is arranged on one side in the circumferential direction (counterclockwise direction on the paper surface of FIG. 5) that is the turning direction Dt of the swirling flow Fa. and spit out the cleaning water.

図6は、図2の一部の拡大図である。図7(a)~図7(c)のそれぞれは、図6のI-I、II-II、III-IIIの断面図である。図8(a)、図8(b)のそれぞれは、図6のIV-IV、V-Vの断面図である。 FIG. 6 is an enlarged view of part of FIG. 7(a) to 7(c) are cross-sectional views taken along II, II-II, and III-III in FIG. 6, respectively. 8A and 8B are cross-sectional views taken along IV-IV and VV in FIG. 6, respectively.

図5~図8に示すように、大便器10は、吐水部42が吐き出す洗浄水を旋回方向Dtに導く導水路48を備える。導水路48は、洗浄水を受ける棚面50とリム部26の内周面とが構成する。棚面50は、汚物受け面24の外周側部分に設けられる。本実施形態の棚面50は、棚面50の内周端部を構成する凸曲面部52と、その凸曲面部52より外周側に設けられる平坦面部54と、棚面50の外周端部を構成する曲面部58とを有する。棚面50は、その凸曲面部52を介して棚面50より下方に位置する汚物受け面24の凹曲面部56に連なる。平坦面部54の鉛直断面は、その凹曲面部56の上端部より緩やかな勾配となるように形成される。 As shown in FIGS. 5 to 8, the toilet bowl 10 includes a water conduit 48 that guides flush water discharged by the water discharger 42 in the turning direction Dt. The water conduit 48 is constituted by a shelf surface 50 for receiving washing water and the inner peripheral surface of the rim portion 26 . The shelf surface 50 is provided on the outer peripheral portion of the dirt receiving surface 24 . The shelf surface 50 of this embodiment includes a convex curved surface portion 52 forming an inner peripheral end portion of the shelf surface 50, a flat surface portion 54 provided on the outer peripheral side of the convex curved surface portion 52, and an outer peripheral end portion of the shelf surface 50. and a curved surface portion 58 to form. The shelf surface 50 continues through the convex curved surface portion 52 to the concave curved surface portion 56 of the dirt receiving surface 24 located below the shelf surface 50 . The vertical cross section of the flat surface portion 54 is formed so as to have a gentler slope than the upper end portion of the concave curved surface portion 56 .

本実施形態の棚面50は、図1に示すように、便鉢部16の後面部22Bから一対の側面部22R、22Lのそれぞれを介して前面部22Fまでの範囲で連続するように形成される。本実施形態の棚面50は、一対の側面部22R、22Lや後面部22Bにて周方向の全範囲に亘り形成され、前面部22Fにて周方向の一部の範囲で形成される。 As shown in FIG. 1, the shelf surface 50 of the present embodiment is formed so as to extend continuously from the rear surface portion 22B of the toilet bowl portion 16 to the front surface portion 22F via the pair of side surface portions 22R and 22L. be. The shelf surface 50 of this embodiment is formed over the entire circumferential range of the pair of side surface portions 22R and 22L and the rear surface portion 22B, and is formed over a partial circumferential range of the front surface portion 22F.

図5~図8に示すように、本実施形態の導水路48の一部は、平面視において、吐水口44から旋回流Faの旋回方向Dtに延びるとともに、開口部32を通り抜けるように形成される。本実施形態の棚面50は、吐水口44の底面に滑らかに連なるように形成される。 As shown in FIGS. 5 to 8, part of the water conduit 48 of the present embodiment extends from the water discharge port 44 in the swirling direction Dt of the swirling flow Fa and passes through the opening 32 in plan view. be. The shelf surface 50 of this embodiment is formed so as to smoothly connect to the bottom surface of the spout 44 .

曲面部58は、導水路48の下側内隅部を構成するとともに凹曲面状をなす。曲面部58は、旋回流Faの旋回方向Dtに向かって順に、第1定区間60、増加区間62、第2定区間64、減少区間66、第3定区間68を有する。曲面部58は、第1定区間60から第3定区間68までの範囲で鉛直断面での曲率半径が滑らかに変化するように設けられる。これは、この範囲で曲率半径が急激に変化して段差部が形成されないことを意味する。 The curved surface portion 58 constitutes a lower inner corner portion of the water conduit 48 and has a concave surface shape. The curved surface portion 58 has a first constant section 60, an increasing section 62, a second constant section 64, a decreasing section 66, and a third constant section 68 in order toward the swirling direction Dt of the swirling flow Fa. The curved surface portion 58 is provided so that the radius of curvature in the vertical section smoothly changes in the range from the first constant section 60 to the third constant section 68 . This means that in this range, the radius of curvature abruptly changes and a stepped portion is not formed.

第1定区間60は、吐水口44に連なり、旋回流Faの旋回方向Dtに向かって、第1曲率半径Raで実質的に一定の曲率半径に形成される。 The first constant section 60 continues to the water discharge port 44 and is formed with a substantially constant radius of curvature at a first curvature radius Ra in the swirling direction Dt of the swirling flow Fa.

増加区間62は、第1定区間60に連なり、旋回流Faの旋回方向Dtに向かって、第1曲率半径Raから第2曲率半径Rbに曲率半径が連続的に増加するように形成される。 The increasing section 62 continues to the first constant section 60 and is formed such that the radius of curvature continuously increases from the first radius of curvature Ra to the second radius of curvature Rb in the swirling direction Dt of the swirling flow Fa.

第2定区間64は、増加区間62と減少区間66を連ね、旋回流Faの旋回方向Dtに向かって、第2曲率半径Rbで実質的に一定の曲率半径に形成される。 The second constant section 64 connects the increasing section 62 and the decreasing section 66, and is formed with a substantially constant radius of curvature at a second radius of curvature Rb toward the swirling direction Dt of the swirling flow Fa.

減少区間66は、第3定区間68に連なり、旋回流Faの旋回方向Dtに向かって、第2曲率半径Rbから第3曲率半径Rcに曲率半径が連続的に減少するように形成される。 The decreasing section 66 continues to the third constant section 68 and is formed such that the radius of curvature continuously decreases from the second radius of curvature Rb to the third radius of curvature Rc in the swirling direction Dt of the swirling flow Fa.

第3定区間68は、旋回流Faの旋回方向Dtに向かって、第3曲率変形Rcで実質的に一定の曲率半径に形成される。第3曲率半径Rcは、第3定区間68と左右対称の位置に設けられる曲面部58の一部58a(図1参照)と実質的に同じ曲率半径に設定される。 The third constant section 68 is formed with a substantially constant radius of curvature in the third curvature deformation Rc toward the swirl direction Dt of the swirl flow Fa. The third radius of curvature Rc is set to substantially the same radius of curvature as the portion 58a (see FIG. 1) of the curved surface portion 58 provided at a position symmetrical to the third constant section 68. As shown in FIG.

図5に示すように、増加区間62は、吐水部42から便鉢部16の前後方向Xの一端部16b(前端部)に至る洗浄水経路70(図1参照)上に設けられる上方誘導部72を構成する。ここでの洗浄水経路70とは、吐水部42から吐き出された洗浄水が便鉢部16内を伝う経路をいう。この上方誘導部72は、詳細を後述するように、吐水部42が吐き出す洗浄水の少なくとも一部を上方に誘導する。 As shown in FIG. 5, the increase section 62 is an upward guiding portion provided on the flush water path 70 (see FIG. 1) from the water discharger 42 to one end 16b (front end) of the toilet bowl 16 in the front-rear direction X. 72. The flush water path 70 here refers to a path along which the flush water discharged from the water discharger 42 travels through the toilet bowl 16 . The upward guiding portion 72 guides upward at least part of the washing water discharged by the water discharging portion 42, as will be described later in detail.

増加区間62は、便鉢部16の側面部22Rに設けられる内方誘導部74を構成する。この内方誘導部74は、詳細を後述するように、自らと衝突した洗浄水の一部を径方向内側に誘導する。 The increased section 62 constitutes an inward guide portion 74 provided on the side portion 22R of the toilet bowl portion 16 . As will be described later in detail, the inward guide portion 74 guides part of the wash water that has collided with itself radially inward.

本実施形態の増加区間62の少なくとも一部は、平面視において、開口部32の奥側かつ吐水口44の外側にて、吐水口44から延びる吐水口44の中心線Ldと交わる位置に設けられる。本実施形態の増加区間62は、便鉢部16の一対の側面部22R、22Lのうち、便鉢部16の一方の面部22X(前面部22F)に対して旋回方向Dtとは周方向の反対側(時計回り方向)に隣り合う便鉢部16の側面部22Rに設けられる。増加区間62は、吐水部42の吐水口44より下流側にて吐水口44の近傍に設けられる。ここでの「近傍」とは、吐水口44から20mm以内の範囲をいう。ここで説明した条件は、前述の上方誘導部72や内方誘導部74も同様に満たす。 At least part of the increased section 62 of the present embodiment is provided at a position that intersects the center line Ld of the water discharge port 44 extending from the water discharge port 44 on the inner side of the opening 32 and outside the water discharge port 44 in plan view. . The increased section 62 of the present embodiment is circumferentially opposite to the turning direction Dt with respect to one side portion 22X (front portion 22F) of the toilet bowl portion 16 of the pair of side portions 22R and 22L of the toilet bowl portion 16. It is provided on the side surface portion 22R of the toilet bowl portion 16 adjacent to the side (clockwise direction). The increase section 62 is provided in the vicinity of the water discharge port 44 on the downstream side of the water discharge port 44 of the water discharger 42 . The “nearby” here refers to a range within 20 mm from the spout 44 . The conditions described here are also satisfied by the above-described upward guide portion 72 and inward guide portion 74 .

以上の便器装置12による洗浄方法を説明する。本実施形態の便器装置12は、水の落差を用いて汚物を押し流す洗い落とし式の洗浄方式によって汚物を排出する。洗浄水供給装置14は、所定の洗浄開始条件を満たすと、所定の水量の洗浄水を吐水部42に供給する。洗浄開始条件は、たとえば、レバー等の操作部材、または、リモートコントローラ、スマートフォン等の電気機器によって洗浄水供給装置14が洗浄開始操作を受けることである。 A cleaning method using the above toilet device 12 will be described. The toilet device 12 of the present embodiment discharges wastes by a wash-off type cleaning method in which wastes are washed away by using a drop of water. The washing water supply device 14 supplies a predetermined amount of washing water to the water discharger 42 when a predetermined washing start condition is satisfied. The cleaning start condition is, for example, that the cleaning water supply device 14 receives a cleaning start operation by an operation member such as a lever or an electric device such as a remote controller or a smartphone.

図9は、洗浄水の流れ方を示す図である。本図では、洗浄水の流れ方向に矢印を付して示す。吐水部42は、洗浄水供給装置14から供給された洗浄水を便鉢部16内に吐き出す。吐水部42から吐き出された洗浄水は、便鉢部16内を旋回する旋回流Faを形成する。旋回流Faは、便鉢部16の前面部22F、左側面部22L及び後面部22Bを経由して右側面部22Rを前方に向かうように形成される。旋回流Faは、便鉢部16の側面部22R、22Lや後面部22Bを経由するときに、棚面50を伝うように形成される。旋回流Faは主流として形成される。本明細書での「主流」とは、洗浄水の一部が部分的に集まった状態で流れるすじ状の流れをいう。旋回流Faを形成する洗浄水の一部は便鉢部16内を旋回する途中に徐々に分流Fbに分かれ、その分流Fbは便鉢部16の底側に向けて流れ落ちる。 FIG. 9 is a diagram showing how washing water flows. In this figure, the direction of flow of washing water is indicated by an arrow. The water discharger 42 discharges the wash water supplied from the wash water supply device 14 into the toilet bowl 16 . The wash water discharged from the water discharger 42 forms a swirl flow Fa that swirls in the toilet bowl 16 . The swirling flow Fa is formed so as to pass through the front surface portion 22F, the left side surface portion 22L, and the rear surface portion 22B of the toilet bowl portion 16 and go forward on the right side portion 22R. The swirl flow Fa is formed so as to travel along the shelf surface 50 when passing through the side surface portions 22R and 22L and the rear surface portion 22B of the toilet bowl portion 16. As shown in FIG. The swirling flow Fa is formed as the main flow. As used herein, the term "main stream" refers to a streaky flow in which some of the wash water is partially collected. Part of the wash water forming the swirling flow Fa is gradually divided into a branch flow Fb while swirling in the toilet bowl 16 , and the branch flow Fb flows down toward the bottom side of the toilet bowl 16 .

便鉢部16の底部側に向かう水流Fb、Fg(水流Fgは後述する)は、便器排水路18の入口18aに汚物を押し込むような流れとなる。このような水流Fb、Fgによって、便鉢部16内の汚物が便器排水路18を通して排出される。 The water flows Fb and Fg (the water flow Fg will be described later) directed toward the bottom side of the toilet bowl 16 become flows that push waste into the entrance 18 a of the toilet drainage channel 18 . Waste in the toilet bowl 16 is discharged through the toilet drainage channel 18 by such water flows Fb and Fg.

図2を参照する。ジェット吐水口41は、洗浄水供給装置14から供給された洗浄水を便器排水路13内で下流側に向けて吐き出す。本実施形態のジェット吐水口41は、便器排水路18内で洗浄水が下流側に向けて流れている途中に洗浄水を吐き出す。ジェット吐水口41から吐き出された洗浄水は、便器排水路18内を下流側に向かう流れの水勢を増幅させる。 Please refer to FIG. The jet water spout 41 spouts the flush water supplied from the flush water supply device 14 toward the downstream side within the toilet drain path 13 . The jet water spout 41 of the present embodiment spouts cleansing water while the cleansing water is flowing downstream in the toilet drainage channel 18 . The flush water discharged from the jet water outlet 41 amplifies the water force of the flow toward the downstream side in the toilet drainage channel 18.例文帳に追加

図10、図11は、洗浄水の流れ方を模式的に示す図である。図10は、大便器10を左上側の後方から見た図であり、図11は、大便器10の一部を左側から見た断面図である。図10では、説明の便宜のため、図1の左右中心線Lcが通る箇所に線Lc’を付す。また、図10では、リム部26の内周面を伝う過程で洗浄水が届く領域の上辺に線Leを付す。 10 and 11 are diagrams schematically showing how washing water flows. FIG. 10 is a view of the toilet bowl 10 viewed from the upper left rear side, and FIG. 11 is a cross-sectional view of a portion of the toilet bowl 10 viewed from the left side. In FIG. 10, for convenience of explanation, a line Lc' is attached to a location where the left-right center line Lc of FIG. 1 passes. Further, in FIG. 10, a line Le is attached to the upper side of the region where the washing water reaches while running along the inner peripheral surface of the rim portion 26 .

吐水部42から吐き出された洗浄水の少なくとも一部は、上方誘導部72(導水路48の増加区間62)との衝突により上方に誘導されて第1誘導流Fcを形成する。このように上方誘導部72(導水路48の増加区間62)は、遠心力を用いることなく、洗浄水の少なくとも一部を上方に誘導する。第1誘導流Fcは、前述の旋回流Faの一部として形成される。本実施形態の第1誘導流Fcは、増加区間62により誘導されることで、汚物受け面24から離れるように跳ね上げられる。第1誘導流Fcは、前述の洗浄水経路70上において、リム部26の内周面を旋回方向Dtに伝いつつ、上向きに流れてから自重により下向きに流れるように形成される。本実施形態の第1誘導流Fcは、前述の洗浄水経路70で開口部32の外側にて最高点Phに達するように形成される。 At least part of the flushing water discharged from the water discharger 42 collides with the upward guiding portion 72 (the increased section 62 of the water conduit 48) and is guided upward to form the first guided flow Fc. In this manner, the upward guide portion 72 (the increasing section 62 of the water conduit 48) guides at least part of the washing water upward without using centrifugal force. The first induced flow Fc is formed as part of the swirl flow Fa described above. The first induced flow Fc of the present embodiment is induced by the increasing section 62 and bounces up away from the dirt receiving surface 24 . The first induced flow Fc is formed on the washing water path 70 described above so as to flow upward along the inner peripheral surface of the rim portion 26 in the turning direction Dt and then downward due to its own weight. The first induced flow Fc of this embodiment is formed so as to reach the highest point Ph outside the opening 32 in the washing water path 70 described above.

吐水部42から吐き出された洗浄水の一部は、内方誘導部74(導水路48の増加区間62)と衝突して拡散することによって、便鉢部16の径方向内側に誘導されて第2誘導流Fdを形成する。第2誘導流Fdは、棚面50から凹曲面部56に流れ落ちるように形成される。第2誘導流Fdは、便鉢部16内に形成される旋回流Faと合流する。これらの合流箇所Sa(図9も参照)は、平面視にて、リム部26の内周面より径方向内側、つまり、オーバーハング面がない箇所となる。 A portion of the flush water discharged from the water discharging portion 42 collides with the inner guiding portion 74 (the increased section 62 of the water conduit 48) and diffuses, thereby being guided radially inward of the toilet bowl portion 16 to reach the first position. 2 to form an induced flow Fd. The second induced flow Fd is formed to flow down from the shelf surface 50 to the concave curved surface portion 56 . The second induced flow Fd joins the swirling flow Fa formed within the toilet bowl 16 . These confluence points Sa (see also FIG. 9) are radially inner than the inner peripheral surface of the rim portion 26 in a plan view, that is, a point where there is no overhang surface.

吐水部42から吐き出された洗浄水の一部は、導水路48の増加区間62(上方誘導部72及び内方誘導部74)により上方や径方向内側に誘導されることなく直進する直進流Feを形成する。直進流Feは、前述の旋回流Faの一部として形成される。本実施形態では、吐水部42から吐き出された洗浄水の一部が第1誘導流Fcを形成し、洗浄水の更に一部が第2誘導流Fdを形成し、洗浄水の残部が直進流Feを形成する。直進流Feは、前述の洗浄水経路70上にてリム部26の内周面を旋回方向Dtに伝わる。 A portion of the wash water discharged from the water discharge portion 42 is a straight flow Fe that travels straight without being guided upward or radially inward by the increased section 62 (the upward guide portion 72 and the inner guide portion 74) of the water conduit 48. to form The straight flow Fe is formed as part of the swirl flow Fa described above. In this embodiment, part of the cleansing water discharged from the water discharger 42 forms the first induced flow Fc, part of the cleansing water forms the second induced flow Fd, and the rest of the cleansing water forms the straight flow. form Fe. The straight flow Fe travels along the inner peripheral surface of the rim portion 26 in the swirling direction Dt on the washing water path 70 described above.

第1誘導流Fcや直進流Feは、前述の洗浄水経路70上にて便鉢部16の一端部16b(前端部)に向けて流れる。この経路を流れる過程で、直進流Feは、遠心力を受けて上向きの速度成分が付与されることで上向きに流れようとする。第1誘導流Fcは、下向きに流れる過程で、この上向きに流れようとする他の水流(直進流Fe)と合流することで、その上向きの流れを妨げようとする。第1誘導流Fcは、直進流Feと合流することで、直進流Feの上向きの速度成分の少なくとも一部を相殺することになる。これらの合流箇所の少なくとも一部は前述の洗浄水経路70上となる。第1誘導流Feは、他の水流(直進流Fe)と合流しつつ、その合流した他の水流とともに一方の面部22X(前面部22F)を伝う過程で遠心力により上向きに流れる。この後、第1誘導流Feは、便鉢部16の前後方向Xの一端部16bより旋回方向Dtにて、その合流した他の水流とともに下向きに流れて棚面50により受けられ、その棚面50上を旋回方向Dtに伝わる。 The first induced flow Fc and the straight flow Fe flow toward the one end 16b (front end) of the toilet bowl 16 on the flush water path 70 described above. In the process of flowing through this path, the straight flow Fe tends to flow upward by receiving a centrifugal force and imparting an upward velocity component. In the process of flowing downward, the first induced flow Fc tries to hinder the upward flow by merging with another water flow (straight flow Fe) that is about to flow upward. The first induced flow Fc cancels at least part of the upward velocity component of the straight flow Fe by joining with the straight flow Fe. At least part of these confluence points is on the washing water path 70 described above. The first induced flow Fe merges with another water flow (straight flow Fe) and flows upward by centrifugal force in the process of traveling along one surface portion 22X (front surface portion 22F) together with the merged water flow. Thereafter, the first induced flow Fe flows downward together with the other water flow that joins it in the turning direction Dt from one end 16b of the toilet bowl 16 in the front-rear direction X, and is received by the shelf surface 50. 50 in the turning direction Dt.

第1誘導流Fcや直進流Feを形成する洗浄水は、前述の旋回流Faの一部として便鉢部16内を旋回したうえで、便鉢部16の右側面部22Rを前方に向かうように流れる。前述の第2誘導流Fdは、このように便鉢部16の右側面部22Rを前方に向かう旋回流Faと合流する。このように、第2誘導流Fdと合流する旋回流Faは、内方誘導部74により径方向内側に誘導されることなく流れた洗浄水の一部が形成する。旋回流Faと合流した第2誘導流Fdは、便鉢部16の前面部22F及び後面部22Bのうち、便鉢部16の一方の面部22X(前面部22F)にて、汚物受け面24の棚面50より下方で凹曲面部56の一部56aを経由しつつ、便鉢部16の溜水部28に向けて流れ落ちる水流Fgを形成する(図9も参照)。 The flush water forming the first induced flow Fc and the straight flow Fe swirls in the toilet bowl 16 as part of the swirling flow Fa described above, and then flows forward along the right side surface 22R of the toilet bowl 16. flow. The above-mentioned second induced flow Fd thus joins the swirl flow Fa that travels forward on the right side surface 22R of the toilet bowl 16 . In this way, the swirling flow Fa that joins the second guided flow Fd is formed by part of the wash water that has flowed without being guided radially inward by the inward guiding portion 74 . The second induced flow Fd merged with the swirling flow Fa is formed on one surface 22X (front surface 22F) of the toilet bowl 16 out of the front surface 22F and the rear surface 22B of the toilet bowl 16, and the filth receiving surface 24. Below the shelf surface 50, a water flow Fg is formed that flows down toward the water storage portion 28 of the toilet bowl portion 16 while passing through a portion 56a of the concave curved surface portion 56 (see also FIG. 9).

本実施形態の大便器10は、以上の洗浄水の流れが形成されるように構成される。このように構成するうえで、大便器10の便鉢部16の形状、吐水部42から吐き出される洗浄水の流量、洗浄水を吐き出す方向等が定められる。洗浄水の流量は、たとえば、吐水部42の吐水口44や通水路46の断面形状に応じて定められる。ここでの「便鉢部16の形状」には、本実施形態では、前述の導水路48の増加区間62(上方誘導部72及び内方誘導部74)が含まれる。 The toilet bowl 10 of the present embodiment is configured to form the flow of flush water described above. For this configuration, the shape of the toilet bowl portion 16 of the toilet bowl 10, the flow rate of the wash water discharged from the water discharge portion 42, the discharge direction of the wash water, and the like are determined. The flow rate of the washing water is determined according to the cross-sectional shape of the water discharge port 44 of the water discharger 42 and the water conduit 46, for example. In this embodiment, the "shape of the toilet bowl portion 16" includes the increased section 62 (the upward guiding portion 72 and the inward guiding portion 74) of the water conduit 48 described above.

以上の大便器10の効果を説明する。大便器10は、洗浄水を上方に誘導する上方誘導部72を備える。よって、前述の洗浄水経路70上において、上方誘導部72により上方に誘導してから自重により下方に向かう第1誘導流Fcを形成できる。このため、このような第1誘導流Fcが形成されない場合と比べ、便鉢部16の一方の面部22X(前面部22F)を伝う水流の上向きの速度成分を低減できる。これに伴い、その一方の面部22X(前面部22F)からの洗浄水の飛び出しを抑制できる。 The effects of the toilet bowl 10 described above will be described. The toilet bowl 10 includes an upward guide portion 72 that guides flush water upward. Therefore, on the washing water path 70 described above, the first guided flow Fc can be formed that is guided upward by the upward guiding portion 72 and then directed downward by its own weight. Therefore, the upward velocity component of the water flow running along one surface portion 22X (front surface portion 22F) of the toilet bowl portion 16 can be reduced compared to the case where such a first induced flow Fc is not formed. Along with this, it is possible to suppress the washing water from jumping out from the one surface portion 22X (the front surface portion 22F).

第1誘導流Fcは、下向きに流れる過程で他の水流(直進流Fe)と合流しつつ、その他の水流とともに一方の面部22X(前面部F)を伝う過程で遠心力により上向きに流れる。よって、第1誘導流Fcが他の水流と合流しつつ上向きに流れない場合より、一方の面部22Xでの洗浄範囲を上下方向に広範囲化できる。 The first induced flow Fc merges with another water flow (straight flow Fe) in the process of flowing downward, and flows upward due to centrifugal force in the process of traveling along one surface portion 22X (front surface portion F) together with the other water flow. Therefore, compared to the case where the first induced flow Fc does not flow upward while merging with other water flows, the cleaning range on the one surface portion 22X can be widened in the vertical direction.

内方誘導部74により誘導された洗浄水は、平面視にてリム部26の内周面より径方向内側において、便鉢部16内に形成される旋回流Faと合流する。よって、内方誘導部74により誘導された洗浄水と旋回流Faが合流して水勢を増幅することで、便鉢部16の洗浄能力を増大できる。 The wash water guided by the inward guiding portion 74 joins the swirling flow Fa formed in the toilet bowl portion 16 radially inward of the inner peripheral surface of the rim portion 26 in plan view. Therefore, the washing water guided by the inward guiding portion 74 joins the swirling flow Fa to amplify the water force, thereby increasing the washing ability of the toilet bowl portion 16 .

内方誘導部74は、洗浄水の一部を径方向内側に誘導するため、その洗浄水の全てを誘導する場合と比べ、旋回流Faと合流する洗浄水(第2誘導流Fd)の流量を低減でき、その旋回流Faとの合流により生じる飛沫を抑制できる。よって、オーバーハング面が形成されない箇所にて、内方誘導部74により誘導された洗浄水と旋回流Faが合流したとしても、その飛沫の便鉢部16外への飛び出しを抑制できる。 Since the inward guide portion 74 guides part of the wash water radially inward, the flow rate of the wash water (second induced flow Fd) joining the swirling flow Fa is higher than in the case where all of the wash water is guided. can be reduced, and droplets generated by joining with the swirl flow Fa can be suppressed. Therefore, even if the wash water guided by the inward guiding portion 74 and the swirling flow Fa join at a location where no overhang surface is formed, splashing out of the toilet bowl portion 16 can be suppressed.

内方誘導部74により形成される第2誘導流Fdと合流する旋回流Faは、吐水部42が吐き出した洗浄水の一部が形成する。よって、この旋回流Faを形成するために他の吐水部42を設けずともよくなる。これに伴い、大便器10に要する吐水部42の数を抑えられ、その分、良好な意匠性を得られる。 The swirling flow Fa that joins the second guided flow Fd formed by the inward guiding portion 74 is formed by part of the washing water discharged by the water discharging portion 42 . Therefore, it is not necessary to provide another water discharger 42 to form the swirl flow Fa. As a result, the number of water discharge portions 42 required for the toilet bowl 10 can be reduced, and good design can be obtained accordingly.

内方誘導部74は、吐水部42の吐水口44より下流側にて吐水口44の近傍に設けられる。よって、吐水口44より下流側にて吐水口44から遠い箇所に内方誘導部74を設ける場合と比べ、第2誘導流Fdと旋回流Faの合流箇所を吐水口44に近づけられ、その分、第2誘導流Fdと合流するまでの間の旋回流Faの便鉢部16内での旋回距離を短くできる。かりに、便鉢部16内に供給される洗浄水の流量が少ない場合、第2誘導流Fdと旋回流Faの合流箇所が吐水口44から旋回流Faの旋回方向Dtに遠ざかるほど、旋回流Faの水勢が弱くなり、洗浄水により十分に洗浄できない領域が生じ易くなる。この点、本実施形態によれば、洗浄水の流量が少ない場合でも、便鉢部16内の広い範囲を洗浄できる。 The inward guiding portion 74 is provided in the vicinity of the water discharge port 44 on the downstream side of the water discharge port 44 of the water discharger 42 . Therefore, compared to the case where the inward guide portion 74 is provided at a location farther from the water discharge port 44 on the downstream side than the water discharge port 44, the confluence point of the second guided flow Fd and the swirl flow Fa can be brought closer to the water discharge port 44, and the amount of , the swirl distance of the swirl flow Fa within the toilet bowl 16 until it joins the second induction flow Fd can be shortened. When the flow rate of flush water supplied into the toilet bowl 16 is small, the farther the junction of the second guided flow Fd and the swirl flow Fa from the spout 44 in the swirl direction Dt of the swirl flow Fa, the more the swirl flow Fa The force of the water is weakened, and areas that cannot be sufficiently washed with the washing water tend to occur. In this regard, according to the present embodiment, even when the flow rate of flush water is low, a wide area inside the toilet bowl 16 can be cleaned.

(A)吐水部42は、便鉢部16の側面部22Rに形成される開口部32を通して便鉢部16内に洗浄水を吐き出す。よって、便鉢部16の後面部22Bに開口部32を形成する場合と比べ、大便器10を正面側から見たときに、その開口部32を視認し難くなり、良好な意匠性を得られる。また、便鉢部16の後面部22Bに開口部32を形成する場合と比べ、大便器10の正面側から開口部32に手が届きやすくなり、良好な清掃性を得られる。 (A) The water discharger 42 discharges wash water into the toilet bowl 16 through the opening 32 formed in the side surface 22</b>R of the toilet bowl 16 . Therefore, compared with the case where the opening 32 is formed in the rear surface portion 22B of the toilet bowl portion 16, when the toilet bowl 10 is viewed from the front side, the opening 32 becomes difficult to be visually recognized, and good design can be obtained. . In addition, compared to the case where the opening 32 is formed in the rear surface portion 22B of the toilet bowl 16, the opening 32 can be easily reached from the front side of the toilet bowl 10, and good cleaning performance can be obtained.

洗浄水の飛び出しを抑制するため、便鉢部16の前面部22Fや後面部22Bに開口部32を形成する手段も考えられる。これにより、吐水部42から一方の面部22Aまでの旋回流Faの旋回距離を長くでき、その旋回流Faの水勢を弱めることで、その洗浄水の飛び出しを抑制できる。本実施形態によれば、このような手段を採ることなく、洗浄水の飛び出しを抑制できる。 In order to suppress the washing water from jumping out, a means of forming openings 32 in the front surface portion 22F and the rear surface portion 22B of the toilet bowl 16 is also conceivable. As a result, the swirling distance of the swirling flow Fa from the water discharger 42 to the one surface portion 22A can be lengthened, and by weakening the force of the swirling flow Fa, it is possible to suppress the wash water from jumping out. According to this embodiment, it is possible to suppress the washing water from jumping out without using such a means.

リム部26の内周面には、一方の面部22X(前面部22F)において、オーバーハング面のない連続面40が設けられる。よって、一方の面部22Xにオーバーハング面がなくとも、その連続面40を伝う洗浄水の飛び出しを抑制できる。 On the inner peripheral surface of the rim portion 26, one surface portion 22X (front surface portion 22F) is provided with a continuous surface 40 having no overhang surface. Therefore, even if the one surface portion 22X does not have an overhang surface, it is possible to prevent the washing water from running out along the continuous surface 40 thereof.

リム部26の内周面には、開口部32以外の箇所にて、便鉢部16の全周に亘る範囲で連続面40が設けられる。よって、便鉢部16の周方向の広い範囲にて、拭き掃除で手の届き難いオーバーハング面が設けられないため、リム部26の内周面を拭き易くなる。 A continuous surface 40 is provided on the inner peripheral surface of the rim portion 26 over the entire circumference of the toilet bowl portion 16 at locations other than the opening portion 32 . Therefore, since an overhang surface that is difficult to reach by wiping is not provided in a wide range in the circumferential direction of the toilet bowl 16, the inner peripheral surface of the rim 26 can be easily wiped.

上方誘導部72は、導水路48の曲面部58の増加区間62が構成する。よって、導水路48の底面(棚面50)に広範囲で凹凸を形成することなく上方誘導部72を構成でき、良好な意匠性を得られる。 The upward guide portion 72 is configured by the increased section 62 of the curved surface portion 58 of the water conduit 48 . Therefore, the upper guiding portion 72 can be configured without forming unevenness in a wide range on the bottom surface (shelf surface 50) of the water conduit 48, and good design can be obtained.

内方誘導部74は、導水路48の曲面部58の増加区間62が構成する。よって、導水路48の底面(棚面50)に広範囲で凹凸を形成することなく内方誘導部74を構成でき、良好な意匠性を得られる。 The inward guide portion 74 is configured by the increased section 62 of the curved surface portion 58 of the water conduit 48 . Therefore, the inward guiding portion 74 can be configured without forming unevenness in a wide range on the bottom surface (shelf surface 50) of the water conduit 48, and good design can be obtained.

曲面部58は、増加区間62より旋回流Faの旋回方向Dtに設けられる減少区間66を有する。よって、増加区間62より旋回方向Dtに設けられ、増加区間62の最大曲率半径より曲率半径の小さい他の区間(第3定区間68)と増加区間62とを減少区間66を介して滑らかに繋げられる。これに伴い、導水路48の曲面部58に増加区間62がある場合に、増加区間62と他の区間の間で目立つような段差面が形成されず、良好な意匠性を得られる。 The curved surface portion 58 has a decreasing section 66 provided in the swirl direction Dt of the swirl flow Fa from the increasing section 62 . Therefore, another section (third constant section 68) provided in the turning direction Dt from the increasing section 62 and having a radius of curvature smaller than the maximum curvature radius of the increasing section 62 and the increasing section 62 are smoothly connected via the decreasing section 66. be done. Accordingly, when the curved surface portion 58 of the water conduit 48 has the increased section 62, a conspicuous stepped surface is not formed between the increased section 62 and other sections, and good design can be obtained.

曲面部58は、増加区間62と減少区間66を連ねる第2定区間64を有する。よって、増加区間62と減少区間66により目立つような凸部が形成されず、良好な意匠性を得られる。 The curved surface portion 58 has a second constant section 64 connecting the increasing section 62 and the decreasing section 66 . Therefore, a conspicuous convex portion is not formed by the increasing section 62 and the decreasing section 66, and good design can be obtained.

次に、他の特徴を説明する。図4を参照する。リム部26の内周面には、前側領域30Fと中間領域30Sの境界となる第1曲率変化点30aと、後側領域30Bと中間領域30Sの境界となる第2曲率変化点30bとが設けられる。 Other features will now be described. Please refer to FIG. The inner peripheral surface of the rim portion 26 is provided with a first curvature change point 30a that serves as a boundary between the front region 30F and the intermediate region 30S, and a second curvature change point 30b that serves as a boundary between the rear region 30B and the intermediate region 30S. be done.

図10を参照する。第1誘導流Fcの最高点Phは、リム部26の前側領域30Fと後側領域Bのうち、便鉢部16の一方の面部22X(前面部22F)に設けられる領域(前側領域30F)と、中間領域30Sの境界にある曲率変化点30aの近傍に設けられると好ましい。詳しくは、第1誘導流Fcの最高点Phは、平面視において、曲率変化点30aから前後方向Xで上流側(本例では前後方向Xの後側)に30mm、前後方向Xで下流側(本例では前後方向Xの前側)に15mmの範囲内にあるとより好ましい。これは、本発明者の実験的な知見に基づき設定している。これにより、曲率半径の小さい領域30Fを伝うことで大きい遠心力を受け始める前に第1誘導流Fcを下向きに流し易くなる。これに伴い、強い下向きの勢いを持って直進流Feと合流させ易くなり、その直進流Feや第1誘導流Fcを形成する洗浄水が便鉢部16の一方の面部22X(前面部22F)を流れるとき、洗浄水の飛び出しの抑制を効果的に図れる。 Please refer to FIG. The highest point Ph of the first induced flow Fc is a region (front region 30F) provided on one surface portion 22X (front surface portion 22F) of the toilet bowl portion 16, out of the front region 30F and the rear region B of the rim portion 26. , is preferably provided in the vicinity of the curvature change point 30a on the boundary of the intermediate region 30S. Specifically, in plan view, the highest point Ph of the first induced flow Fc is 30 mm upstream from the curvature change point 30a in the front-rear direction X (in this example, the rear side in the front-rear direction X) and downstream in the front-rear direction X ( In this example, it is more preferable to be within a range of 15 mm on the front side in the front-rear direction X). This is set based on the inventor's experimental findings. This makes it easier for the first induced flow Fc to flow downward before it begins to receive a large centrifugal force by traveling along the region 30F with a small radius of curvature. Along with this, it becomes easy to merge with the straight flow Fe with a strong downward momentum, and the straight flow Fe and the washing water forming the first induced flow Fc flow into one surface portion 22X (front surface portion 22F) of the toilet bowl portion 16. When flowing through the water, it is possible to effectively suppress the jumping out of the washing water.

図6~図8に示すように、便鉢部16には、開口部32の奥側かつ吐水口44の外側にオーバーハング面76が設けられる。オーバーハング面76は、開口部32の上縁部を形成する。オーバーハング面76は、リム部26の内周面にて、その上側に向かう途中で径方向内側に延びるように設けられる。オーバーハング面76は、前述の洗浄水経路70上において、吐水部42から旋回方向Dtに向かう一部の範囲に設けられる。本実施形態の便鉢部16には開口部32の奥側にのみオーバーハング面76が設けられ、その外側ではオーバーハング面76が設けられない。 As shown in FIGS. 6 to 8, the toilet bowl 16 is provided with an overhang surface 76 on the inner side of the opening 32 and outside the spout 44 . Overhang surface 76 forms the upper edge of opening 32 . The overhang surface 76 is provided on the inner peripheral surface of the rim portion 26 so as to extend radially inward on the way to the upper side thereof. The overhang surface 76 is provided in a partial range from the water discharger 42 toward the turning direction Dt on the wash water path 70 described above. The toilet bowl portion 16 of this embodiment is provided with an overhang surface 76 only on the inner side of the opening 32, and the overhang surface 76 is not provided on the outside thereof.

オーバーハング面76は、吐水部42から旋回方向Dtに向かうにつれて連続的に上向きに延びるように水平面に対して傾斜している。オーバーハング面76は、吐水部42から旋回方向Dtに向かうにつれて径寸法が小さくなるように形成される。オーバーハング面76は、上方誘導部72により形成される前述の第1誘導流Fcに上方から接触する位置に設けられる。 The overhang surface 76 is inclined with respect to the horizontal plane so as to extend continuously upward from the water discharger 42 toward the turning direction Dt. The overhang surface 76 is formed such that its diameter dimension decreases from the water discharger 42 toward the turning direction Dt. The overhang surface 76 is provided at a position where it comes into contact with the above-described first guided flow Fc formed by the upper guide portion 72 from above.

これにより、洗浄水供給装置14からの洗浄水供給量が急激に増大してしまい、上方誘導部72により洗浄水が大きく上昇しようとした場合でも、オーバーハング面76により洗浄水の上昇を規制できる。これに伴い、洗浄水が便鉢部16の外部に飛び出す事態を避けられる。また、上方誘導部72により上方に誘導された洗浄水によりオーバーハング面76を洗浄できる利点もある。 As a result, even if the amount of cleansing water supplied from the cleansing water supply device 14 suddenly increases and the cleansing water is about to rise greatly due to the upward guide portion 72, the overhang surface 76 can regulate the rise of the cleansing water. . As a result, flushing water can be prevented from jumping out of the toilet bowl 16. - 特許庁There is also the advantage that the overhang surface 76 can be washed with the washing water guided upward by the upward guide portion 72 .

本実施形態のリム部26の内周面には、開口部32を形成するとともに開口部32より上方に設けられる上方面部78が設けられる。上方面部78は、オーバーハング面が形成されることなく、便鉢部16の上端内縁部16aから開口部32の上縁部まで連続している。上方面部78は、上方面部78と周方向両側に隣接するリム部26の内周面の一部分26aと滑らかに連なっている。ここでの滑らかに連なるとは、言及している二つの対象の間で凹凸が形成されることなく連なることをいう。 An upper surface portion 78 that forms the opening 32 and is provided above the opening 32 is provided on the inner peripheral surface of the rim portion 26 of the present embodiment. The upper surface portion 78 continues from the upper inner edge portion 16a of the toilet bowl portion 16 to the upper edge portion of the opening 32 without forming an overhang surface. The upper surface portion 78 smoothly continues to the portions 26a of the inner peripheral surface of the rim portion 26 adjacent to the upper surface portion 78 on both sides in the circumferential direction. Here, "smoothly connecting" means connecting without forming irregularities between the two objects being referred to.

図5を参照する。吐水部42の底面42aには、吐水口44より奥側から吐水口44にかけての範囲において、吐水口44に向かうにつれて下り傾斜となる勾配が設けられる。これにより、吐水部42の内部に残水が貯まり難くなり、良好な衛生性を得られる。 Please refer to FIG. The bottom surface 42 a of the water discharge portion 42 is provided with a downward slope toward the water discharge port 44 in a range from the inner side of the water discharge port 44 to the water discharge port 44 . This makes it difficult for residual water to accumulate inside the water discharger 42, and good sanitation can be obtained.

(第2の工夫点)
図12は、図1のE-E断面図であり、図13は、図1のF-F断面図である。図2~図4、図12、図13に示すように、リム部26の内周面は、便鉢部16の側面部22R、22Lに設けられる第1面領域90と、便鉢部16の前面部22F及び後面部22Bのうちの少なくとも一方に設けられる第2面領域92、94とを有する。第2面領域92、4の鉛直面Pvに対する傾斜角度θbは、第1面領域90より鉛直面Pvに対する傾斜角度θaより緩やかである。ここでの鉛直面Pvに対する傾斜角度とは、便鉢部16の中心Cpを通る鉛直断面での鉛直面Pvに対する鋭角での傾斜角度をいう。以下、説明の便宜から、第1面領域90を急斜面領域90といい、第2面領域92、94を緩斜面領域92、94という。
(Second ingenuity point)
12 is a cross-sectional view along EE in FIG. 1, and FIG. 13 is a cross-sectional view along FF in FIG. As shown in FIGS. 2 to 4, 12, and 13, the inner peripheral surface of the rim portion 26 includes first surface regions 90 provided on the side portions 22R and 22L of the toilet bowl portion 16, and and second surface regions 92, 94 provided on at least one of the front surface portion 22F and the rear surface portion 22B. The inclination angle θb of the second surface regions 92 and 4 with respect to the vertical plane Pv is gentler than the inclination angle θa with respect to the vertical surface Pv of the first surface region 90 . Here, the angle of inclination with respect to the vertical plane Pv means an acute angle of inclination with respect to the vertical plane Pv in a vertical section passing through the center Cp of the toilet bowl portion 16 . Hereinafter, for convenience of explanation, the first surface region 90 will be referred to as a steep slope region 90, and the second surface regions 92 and 94 will be referred to as gentle slope regions 92 and 94.

緩斜面領域92、94には、便鉢部16の前面部22F及び後面部22Bのうちの一方の面部22Xとなる前面部22Fに設けられる前側緩斜面領域92(一方側緩斜面領域)と、それらのうちの他方の面部となる後面部22Bに設けられる後側緩斜面領域94(他方側緩斜面領域)とが含まれる。 The gentle slope regions 92 and 94 include a front gentle slope region 92 (one side gentle slope region) provided on the front face portion 22F which is one of the front face portion 22F and the rear face portion 22B of the toilet bowl portion 16, and which serves as one face portion 22X. A rear side gentle slope area 94 (the other side gentle slope area) provided on the rear surface portion 22B, which is the other surface portion of them, is included.

急斜面領域90は、便鉢部16の前後方向Xでの中間部を含む周方向範囲に設けられる。前側緩斜面領域92は、便鉢部16の一端部16b(前端部)を含む周方向範囲に設けられ、後側緩斜面領域94は、便鉢部16の前後方向Xの他端部16c(後端部)を含む周方向範囲に設けられる。前側緩斜面領域92は便鉢部16の前面部22Fの少なくとも大部分に設けられ、後側緩斜面領域94は便鉢部16の後面部22Bの少なくとも大部分に設けられる。本実施形態の前側緩斜面領域92は便鉢部16の前面部22Fの全域に設けられる。 The steep slope region 90 is provided in a circumferential range including an intermediate portion in the front-rear direction X of the toilet bowl portion 16 . The front gentle slope region 92 is provided in a circumferential range including one end 16b (front end) of the toilet bowl 16, and the rear gentle slope region 94 is provided in the other end 16c (front end) of the toilet bowl 16 in the front-rear direction X. rear end). The front gently sloping area 92 is provided on at least most of the front surface 22F of the toilet bowl 16, and the rear gently sloping area 94 is provided on at least most of the rear surface 22B of the toilet bowl 16. As shown in FIG. The front gentle slope region 92 of this embodiment is provided over the entire front surface portion 22F of the toilet bowl portion 16 .

急斜面領域90と前側緩斜面領域92の境界となる前側境界部96は、側面視において、便鉢部16の前面部22Fと側面部22R、22Lの何れかにて、それらの境界寄りの端部に設けられる。本実施形態の前側境界部96は、側面部22R、22Lの前面部22F寄りの端部に設けられる。 A front boundary portion 96, which is a boundary between the steep slope region 90 and the front gentle slope region 92, is an end portion near the boundary between the front portion 22F and the side portions 22R and 22L of the toilet bowl portion 16 in a side view. provided in The front boundary portion 96 of the present embodiment is provided at the ends of the side portions 22R and 22L near the front portion 22F.

急斜面領域90と後側緩斜面領域94の境界となる後側境界部98は、側面視において、便鉢部16の側面部22R、22Lと後面部22Bの何れかにて、それらの境界寄りの端部に設けられる。本実施形態の後側境界部98は、後面部22Bの側面部22R、22L寄りの端部に設けられる。 A rear boundary portion 98, which serves as a boundary between the steep slope region 90 and the rear gentle slope region 94, is located near the boundary between the side portions 22R, 22L and the rear surface portion 22B of the toilet bowl portion 16 in a side view. provided at the end. The rear boundary portion 98 of the present embodiment is provided at the end portion of the rear surface portion 22B near the side surface portions 22R and 22L.

急斜面領域90には前述の開口部32が形成される。詳しくは、便鉢部16の右側面部22Rに設けられる急斜面領域90に開口部32が形成され、その左側面部22Lに設けられる急斜面領域90には開口部32が形成されない。また、緩斜面領域92、94には開口部32は形成されない。 The steep slope region 90 is formed with the aforementioned opening 32 . Specifically, the opening 32 is formed in the steep slope area 90 provided on the right side surface 22R of the toilet bowl 16, and the opening 32 is not formed in the steep slope area 90 provided on the left side surface 22L. Also, the openings 32 are not formed in the gentle slope regions 92 and 94 .

図12に示すように、前側緩斜面領域92は、便鉢部16の一端部16b(前端部)に設けられる第1最傾斜部92aと、第1最傾斜部92aと前側境界部96の間に設けられる第1角度変化部92bとを有する。第1最傾斜部92aは、前側緩斜面領域92のなかで傾斜角度が最も大きくなり、その周方向の全範囲で実質的に一定の傾斜角度となる。第1角度変化部92bは、前側境界部96から便鉢部16の一端部16b(前端部)に近づくにつれて、第1最傾斜部92aの傾斜角度に近づくように連続的に傾斜角度が変化する。 As shown in FIG. 12 , the front gentle slope region 92 includes a first most inclined portion 92a provided at one end portion 16b (front end portion) of the toilet bowl portion 16 and a portion between the first most inclined portion 92a and the front boundary portion 96. and a first angle changing portion 92b provided in the . The first most inclined portion 92a has the largest inclination angle in the front gentle slope area 92, and has a substantially constant inclination angle over the entire circumferential range. As the first angle changing portion 92b approaches the one end portion 16b (front end portion) of the toilet bowl portion 16 from the front side boundary portion 96, the inclination angle continuously changes so as to approach the inclination angle of the first most inclined portion 92a. .

図13に示すように、後側緩斜面領域94は、便鉢部16の他端部16c(後端部)に設けられる第2最傾斜部94aと、第2最傾斜部94aと、後側境界部98の間に設けられる第2角度変化部94bとを有する。第2最傾斜部94aは、後側緩斜面領域94のなかで傾斜角度が最も大きくなり、その周方向の全範囲で実質的に一定の傾斜角度となる。第2角度変化部94bは、後側境界部98から便鉢部16の他端部16c(後端部)に近づくにつれて、第2最傾斜部94aの傾斜角度に近づくように連続的に傾斜角度が変化する。 As shown in FIG. 13, the rear gentle slope region 94 includes a second most inclined portion 94a provided at the other end portion 16c (rear end portion) of the toilet bowl portion 16, a second most inclined portion 94a, and a rear side and a second angle changing portion 94 b provided between the boundary portions 98 . The second most inclined portion 94a has the largest inclination angle in the rear gentle slope area 94, and has a substantially constant inclination angle over the entire circumferential range. The second angle changing portion 94b continuously slopes toward the second most inclined portion 94a as it approaches the other end 16c (rear end) of the toilet bowl portion 16 from the rear boundary portion 98. changes.

急斜面領域90及び緩斜面領域92、94には前述の連続面40が設けられる。右側面部22Rに設けられる急斜面領域90には、開口部32以外の箇所にて、その全部の周方向範囲に連続面40が設けられる。左側面部22Lに設けられる急斜面領域90や、緩斜面領域92、94には、その全部の周方向範囲に連続面40が設けられる。 The steep slope region 90 and the shallow slope regions 92, 94 are provided with the continuous surface 40 described above. In the steep slope area 90 provided on the right side surface 22R, the continuous surface 40 is provided over the entire circumferential range at locations other than the opening 32. As shown in FIG. The continuous surface 40 is provided in the entire circumferential range of the steep slope area 90 and the gentle slope areas 92 and 94 provided on the left side surface portion 22L.

本実施形態において、急斜面領域90は前述の中間領域30S、前側緩斜面領域92は前側領域30F、後側緩斜面領域94は後側領域30Rが構成する。急斜面領域90は、平面視において、第3範囲R3内の曲率半径の曲面状をなし、緩斜面領域92、94は、第3範囲R3の曲率半径より小さい曲率半径の曲面状をなすことになる。 In the present embodiment, the steep slope region 90 is configured by the intermediate region 30S, the front gentle slope region 92 is configured by the front region 30F, and the rear gentle slope region 94 is configured by the rear region 30R. In a plan view, the steep slope region 90 has a curved surface shape with a curvature radius within the third range R3, and the gentle slope regions 92 and 94 have a curved surface shape with a curvature radius smaller than the curvature radius of the third range R3. .

以上の工夫点による効果を説明する。図14は、洗浄水Wに作用する遠心力Faの説明図である。本図では、リム部26の内周面の法線方向に沿った第1分力Fa1と、その内周面の面内方向に沿った第2分力Fa2とに分けて遠心力Faを示す。 The effect of the above points of devising will be described. 14A and 14B are explanatory diagrams of the centrifugal force Fa acting on the washing water W. FIG. In this figure, the centrifugal force Fa is divided into a first component force Fa1 along the normal direction of the inner peripheral surface of the rim portion 26 and a second component force Fa2 along the in-plane direction of the inner peripheral surface. .

洗浄水にはリム部26の内周面に沿って流れるときに遠心力Faが作用する。この遠心力Faの第2分力Fa2の成分(=Fa×sinθ)は、リム部26の内周面の傾斜角度θが大きくなるほど増大する。これは、リム部26の内周面の傾斜角度θが大きくなるほど、洗浄水が遠心力Faを受けて広い上下範囲に届き易くなることを意味している。ここでの上下範囲とは、上下方向Zでの範囲をいう。 A centrifugal force Fa acts on the wash water when it flows along the inner peripheral surface of the rim portion 26 . The component (=Fa×sin θ) of the second component force Fa2 of the centrifugal force Fa increases as the inclination angle θ of the inner peripheral surface of the rim portion 26 increases. This means that the greater the inclination angle θ of the inner peripheral surface of the rim portion 26, the easier it is for the wash water to reach a wider vertical range under the centrifugal force Fa. The vertical range here refers to the range in the vertical direction Z. As shown in FIG.

本実施形態の緩斜面領域92、94の傾斜角度θbは、急斜面領域90の傾斜角度θaより緩やかである。よって、急斜面領域90と緩斜面領域92、94とで傾斜角度を同じにする場合と比べ、便鉢部16の前面部22F又は後面部22Bに設けられた緩斜面領域92、94で遠心力を受けた洗浄水が広い上下範囲に届き易くなる。これに伴い、緩斜面領域92、94の連続面40での洗浄範囲を上下方向に広範囲化できる。 The inclination angle θb of the gentle slope regions 92 and 94 in this embodiment is gentler than the inclination angle θa of the steep slope region 90 . Therefore, compared to the case where the steep slope region 90 and the gentle slope regions 92 and 94 have the same inclination angle, the gentle slope regions 92 and 94 provided on the front surface portion 22F or the rear surface portion 22B of the toilet bowl portion 16 generate centrifugal force. The received wash water can easily reach a wide vertical range. Along with this, the cleaning range on the continuous surface 40 of the gentle slope regions 92 and 94 can be widened in the vertical direction.

このように上下方向での洗浄範囲を広くするために、この他にも、平面視でのリム部26の内周面の曲率半径を小さくする手段が考えられる。本実施形態によれば、このような手段をとる場合と比べ、便鉢部16の輪郭を大きく変えずに済む利点がある。 In order to widen the cleaning range in the vertical direction in this manner, other means may be considered to reduce the radius of curvature of the inner peripheral surface of the rim portion 26 in plan view. According to this embodiment, there is an advantage that the outline of the toilet bowl portion 16 does not need to be greatly changed as compared with the case where such measures are taken.

特に、小便により汚れ易い便鉢部16の前面部22Fに設けられた連続面40での洗浄範囲を広範囲化できる。また、拭き掃除し難い便鉢部16の後面部22Bに設けられた連続面40での洗浄範囲を広範囲化できる。 In particular, it is possible to widen the cleaning range of the continuous surface 40 provided on the front surface portion 22F of the toilet bowl portion 16, which is easily soiled by urine. In addition, the cleaning range of the continuous surface 40 provided on the rear surface portion 22B of the toilet bowl portion 16, which is difficult to wipe clean, can be widened.

吐水部42は、急斜面領域90に形成される開口部32を通して便鉢部16内に洗浄水を吐き出す。よって、緩斜面領域92、94に開口部32を形成するよりも、平面視において開口部32が目立ち難くなり、良好な意匠性を得られる。また、この他にも、前述した(A)の効果も得られる。 The water discharger 42 discharges cleansing water into the toilet bowl 16 through the opening 32 formed in the steep slope region 90 . Therefore, compared to forming the openings 32 in the gently sloping areas 92 and 94, the openings 32 are less conspicuous in plan view, and good design can be obtained. In addition to this, the effect (A) described above can also be obtained.

他の特徴を説明する。図4を参照する。棚面50は、便鉢部16の前面部22F(一方の面部22X)や後面部22B(他方の面部)に設けられる便鉢部16の前端又は後端より旋回方向Dtにて前側緩斜面領域92に接続される。詳しくは、棚面50は、便鉢部16の前端より旋回方向Dtにて前側緩斜面領域92に接続され、便鉢部16の後端より旋回方向Dtにて後側緩斜面領域94に接続される。 Other features are described. Please refer to FIG. The shelf surface 50 is a front gentle slope region in the turning direction Dt from the front end or the rear end of the toilet bowl portion 16 provided on the front surface portion 22F (one surface portion 22X) or the rear surface portion 22B (the other surface portion) of the toilet bowl portion 16. 92. Specifically, the shelf surface 50 is connected from the front end of the toilet bowl portion 16 to the front gentle slope region 92 in the turning direction Dt, and is connected from the rear end of the toilet bowl portion 16 to the rear gentle slope region 94 in the turning direction Dt. be done.

これにより、前側緩斜面領域92や後側緩斜面領域94を経由する過程で遠心力を受けて上昇してから下降する洗浄水を棚面50で受け易くなる。これに伴い、前側緩斜面領域92や後側緩斜面領域94を経由した洗浄水の多くを導水路48により遠くまで届かせられる。 This makes it easier for the shelf surface 50 to receive the wash water that rises and then descends due to centrifugal force in the course of passing through the front gentle slope region 92 and the rear gentle slope region 94 . Along with this, most of the wash water that has passed through the front gentle slope region 92 and the rear gentle slope region 94 can be made to reach far by the water conduit 48 .

なお、棚面50は、便鉢部16の前面部22Fにおいて、その便鉢部16の前端より旋回流Faの旋回方向Dtとは反対側にて、前側緩斜面領域92に接続される。また、棚面50は、便鉢部16の後面部22Bにおいて、その全域において後側緩斜面領域94に接続される。 The shelf surface 50 is connected to the front gentle slope region 92 on the front surface portion 22</b>F of the toilet bowl portion 16 on the side opposite to the swirl direction Dt of the swirl flow Fa from the front end of the toilet bowl portion 16 . Further, the shelf surface 50 is connected to the rear gentle slope region 94 in the entire area of the rear surface portion 22B of the toilet bowl portion 16 .

汚物受け面24の凹曲面部56の一部は、便鉢部16の前面部22Fに設けられる。凹曲面部56は、少なくとも便鉢部16の左右中央部16dにおいて、汚物受け面24の下端縁部24bから汚物受け面24の外周端部24aまで連続する。凹曲面部56は、便鉢部16の左右中央部16dにおいて、棚面50を介さずに前側緩斜面領域92に連なることになる。棚面50は、便鉢部16の前面部22Fにて便鉢部16の左右中央部16dには設けられないとも捉えられる。 A part of the concave curved surface portion 56 of the filth receiving surface 24 is provided on the front surface portion 22</b>F of the toilet bowl portion 16 . The concave curved surface portion 56 continues from the lower end edge portion 24b of the waste receiving surface 24 to the outer peripheral end portion 24a of the waste receiving surface 24 at least in the left and right central portions 16d of the toilet bowl portion 16. As shown in FIG. The concave curved surface portion 56 continues to the front gentle slope area 92 without the shelf surface 50 interposed therebetween at the left and right central portions 16 d of the toilet bowl portion 16 . It can also be understood that the shelf surface 50 is not provided in the right-and-left central portion 16d of the toilet bowl portion 16 at the front portion 22F of the toilet bowl portion 16 .

かりに、便鉢部16の前面部22Fにて左右中央部16dに凸曲面状の棚面50の内周端部50a(凸曲面部52)が設けられると、その内周端部50aに小便が当たったときに飛沫が生じ易くなる。この点、本実施形態によれば、その左右中央部16dに凸曲面状の棚面50の内周端部が設けられない構造となるため、小便の飛沫を抑制できる。 If the inner peripheral end portion 50a (convex curved surface portion 52) of the convexly curved shelf surface 50 is provided in the left-right center portion 16d of the front surface portion 22F of the toilet bowl portion 16, the inner peripheral end portion 50a (convex curved surface portion 52) is provided with urine. Droplets are more likely to occur when hit. In this regard, according to the present embodiment, since the inner peripheral end portion of the convexly curved shelf surface 50 is not provided in the left and right central portion 16d, it is possible to suppress urine splashes.

図1を参照する。便鉢部16は、前述の開口部32や開口部32の奥側部分を除く範囲において、実質的に左右対称の位置に設けられる。汚物受け面24は、棚面50の内周端部50aから汚物受け面24の下端縁部24bまでの範囲において、実質的に左右対称の位置に設けられるとも捉えられる。また、棚面50の内周端部50aは実質的に左右対称の位置に設けられるとも捉えられる。また、リム部26の内周面は、前述の開口部32を除く範囲において、実質的に左右対称の位置に設けられるとも捉えられる。 Please refer to FIG. The toilet bowl 16 is provided at a substantially symmetrical position within a range excluding the opening 32 and the innermost portion of the opening 32 . The dirt receiving surface 24 can also be considered to be provided at substantially symmetrical positions in the range from the inner peripheral end portion 50a of the shelf surface 50 to the lower edge portion 24b of the dirt receiving surface 24 . In addition, it can be understood that the inner peripheral end portion 50a of the shelf surface 50 is provided at substantially symmetrical positions. In addition, the inner peripheral surface of the rim portion 26 can be considered to be provided at substantially symmetrical positions within a range excluding the aforementioned opening portion 32 .

大便器10でエッジとなる箇所は目視により位置を把握し易い。本実施形態では、このようなエッジとなる棚面50の内周端部50aが左右対称の位置に設けられる。よって、製造誤差等に起因して棚面50等の形状が左右で非対称となった場合、そのことを目視により判別し易くなり、検品作業の容易化を図れる。 The position of the edge of the toilet bowl 10 can be easily grasped by visual observation. In this embodiment, the inner peripheral end portion 50a of the shelf surface 50, which serves as such an edge, is provided at a symmetrical position. Therefore, when the shape of the shelf surface 50 and the like becomes asymmetrical on the left and right due to a manufacturing error or the like, it becomes easy to visually determine the asymmetry, thereby facilitating the inspection work.

(第2の実施の形態)
図15は、第2実施形態の大便器10の一部を示す側面断面図である。第1実施形態の大便器10は、前側緩斜面領域92及び後側緩斜面領域94の傾斜角度θbが実質的に同じである。これに対して、本実施形態の大便器10は、前側緩斜面領域92及び後側緩斜面領域94の傾斜角度θbが異なる。詳しくは、後側緩斜面領域94は、前側緩斜面領域92より鉛直面に対する傾斜角度θbが緩やかとなる。本実施形態では、後側緩斜面領域94の第2最傾斜部94aの全域での傾斜角度が、前側緩斜面領域92の第1最傾斜部92aの傾斜角度より緩やかとなる。この理由を説明する。
(Second embodiment)
FIG. 15 is a side sectional view showing part of the toilet bowl 10 of the second embodiment. In the toilet bowl 10 of the first embodiment, the inclination angles θb of the front gentle slope region 92 and the rear gentle slope region 94 are substantially the same. On the other hand, in the toilet bowl 10 of the present embodiment, the inclination angles θb of the front gentle slope region 92 and the rear gentle slope region 94 are different. Specifically, the rear gentle slope region 94 has a gentler inclination angle θb with respect to the vertical plane than the front gentle slope region 92 . In this embodiment, the inclination angle of the second most inclined portion 94 a of the rear gentle slope region 94 is gentler than the inclination angle of the first most inclined portion 92 a of the front gentle slope region 92 . The reason for this is explained.

前述の通り、吐水部42が吐き出す洗浄水により形成される旋回流は、前側緩斜面領域92(一方側第2面領域)を経由してから後側緩斜面領域94(他方側第2面領域)を経由する。このため、後側緩斜面領域94を経由するとき、前側緩斜面領域92を経由するときより旋回流の水勢が弱くなり、遠心力を受けて広い上下範囲に届き難くなる。 As described above, the swirling flow formed by the cleansing water discharged by the water discharger 42 passes through the front gentle slope region 92 (one side second surface region) and then flows through the rear gentle slope region 94 (other side second surface region). ). Therefore, when passing through the rear gentle slope region 94, the water force of the swirling flow is weaker than when passing through the front gentle slope region 92, and the centrifugal force makes it difficult to reach a wide vertical range.

(B)この点、本実施形態によれば、弱い水勢の旋回流が後側緩斜面領域94を経由するときでも、その後側緩斜面領域94の広い上下範囲に洗浄水を届かせ易くできる。特に、このような目的を果たすため、吐水部42から吐き出される洗浄水を大流量化せずともよくなり、その大流量化に伴い前側緩斜面領域92から洗浄水が飛び出す事態を避けられる。 (B) In this respect, according to the present embodiment, even when a weak swirling flow passes through the rear gentle slope region 94, the wash water can easily reach a wide vertical range of the rear gentle slope region 94. In particular, in order to achieve such a purpose, it is not necessary to increase the flow rate of the wash water discharged from the water discharge part 42, and it is possible to prevent the wash water from jumping out of the front gentle slope region 92 due to the increased flow rate.

以上、実施形態をもとに本発明を説明した。次に、各構成要素の変形例を説明する。 The present invention has been described above based on the embodiments. Next, modified examples of each component will be described.

便器装置12は、洗い落とし式以外の他の洗浄方式を用いて洗浄してもよい。この洗浄方式とは、たとえば、サイホン式等である。 The toilet device 12 may be cleaned using other cleaning methods than the wash-off method. This cleaning method is, for example, a siphon method or the like.

便鉢部16の開口部32は、側面部22R、22Lの他に、前面部22Fや後面部22Bに形成されていてもよい。開口部32は、急斜面領域90の他に、緩斜面領域92、94に形成されていてもよい。開口部32は便鉢部16に複数形成されていてもよい。 The opening 32 of the toilet bowl 16 may be formed in the front surface 22F or the rear surface 22B in addition to the side surfaces 22R and 22L. The openings 32 may be formed in gentle slope regions 92 , 94 in addition to the steep slope region 90 . A plurality of openings 32 may be formed in the toilet bowl 16 .

便鉢部16の棚面50等は、実質的に左右対称の位置に設けられていなくともよい。 The shelf surfaces 50 and the like of the toilet bowl 16 do not have to be provided at substantially symmetrical positions.

リム部26の内周面には全周に亘る範囲でオーバーハング面が形成されていてもよい。リム部26の内周面では、便鉢部16の全周に亘る部位で傾斜角度を実質的に同じとしてもよい。 An overhang surface may be formed on the inner peripheral surface of the rim portion 26 over the entire circumference. The inner peripheral surface of the rim portion 26 may have substantially the same inclination angle over the entire circumference of the toilet bowl portion 16 .

連続面40は、前述のオーバーハング面が形成されていなければよい。この条件を満たすのであれば、連続面40は、少なくとも一部において、便鉢部16の上端内縁部16aから下方に向かうにつれて、徐々に径方向外側に延びるように設けられていてもよい。 The continuous surface 40 may be formed without the above-described overhang surface. As long as this condition is satisfied, at least a portion of the continuous surface 40 may be provided so as to gradually extend radially outward from the upper inner edge portion 16 a of the toilet bowl portion 16 toward the downward direction.

吐水部42の吐水口44は、リム部26の開口部32の奥側に形成される例を説明したが、その開口部32が吐水口44を構成していてもよい。この場合、リム部26の内周面にはオーバーハング面76が設けられていなくともよい。吐水部42により形成される旋回流Faの旋回方向Dtは時計回り方向でもよい。 Although the water discharge port 44 of the water discharge portion 42 has been described as being formed on the far side of the opening 32 of the rim portion 26 , the opening 32 may constitute the water discharge port 44 . In this case, the overhang surface 76 may not be provided on the inner peripheral surface of the rim portion 26 . The swirl direction Dt of the swirl flow Fa formed by the water discharger 42 may be clockwise.

吐水部42により形成される旋回流Faが先に経由する便鉢部16の前後方向Xの一端部16bを便鉢部16の後端部とし、その旋回流Faが後で経由する便鉢部16の他端部16cを便鉢部16の前端部としてもよい。この場合、便鉢部16の一端部16bが設けられる一方の面部22Xは便鉢部16の後面部22Bとなり、便鉢部16の他端部16cが設けられる他方の面部は便鉢部16の前面部22Fとなる。 One end 16b in the front-rear direction X of the toilet bowl 16 through which the swirling flow Fa formed by the water discharger 42 first passes is defined as the rear end of the toilet bowl 16, and the toilet bowl through which the swirling flow Fa passes later. The other end portion 16 c of 16 may be the front end portion of the toilet bowl portion 16 . In this case, one surface portion 22X provided with one end portion 16b of the toilet bowl portion 16 is the rear surface portion 22B of the toilet bowl portion 16, and the other surface portion provided with the other end portion 16c of the toilet bowl portion 16 is the toilet bowl portion 16. It becomes the front part 22F.

実施形態のように、旋回流Faが先に経由する便鉢部16の一端部が便鉢部16の前端部であり、その便鉢部16の一端部が設けられる一方の面部22Xが便鉢部16の前面部22Fである場合を考える。この場合、吐水部42は、たとえば、便鉢部16の前面部22F(一方の面部22X)に対して旋回方向Dtとは周方向の反対側に隣り合う側面部22Rや、その側面部22Rに隣り合う後面部22Bに設けられていればよい。 As in the embodiment, one end of the toilet bowl portion 16 through which the swirling flow Fa passes first is the front end portion of the toilet bowl portion 16, and one surface portion 22X on which the one end portion of the toilet bowl portion 16 is provided is the toilet bowl. Consider the case of the front part 22F of the part 16 . In this case, the water discharging portion 42 is, for example, the side portion 22R adjacent to the front surface portion 22F (one surface portion 22X) of the toilet bowl portion 16 on the side opposite to the turning direction Dt in the circumferential direction, or the side portion 22R. It is sufficient if they are provided on the adjacent rear surface portions 22B.

旋回流Faが先に経由する便鉢部16の一端部が便鉢部16の後端部であり、その便鉢部16の一端部が設けられる一方の面部22Xが便鉢部16の後面部22Bである場合を考える。この場合、吐水部42は、たとえば、便鉢部16の後面部22B(一方の面部22X)に対して旋回方向Dtとは周方向の反対側に隣り合う側面部22Lや、その側面部22Lに隣り合う前面部22Fに設けられていればよい。 One end portion of the toilet bowl portion 16 through which the swirl flow Fa passes first is the rear end portion of the toilet bowl portion 16, and one surface portion 22X on which the one end portion of the toilet bowl portion 16 is provided is the rear surface portion of the toilet bowl portion 16. 22B. In this case, the water discharging portion 42 is, for example, the side portion 22L adjacent to the rear surface portion 22B (one surface portion 22X) of the toilet bowl portion 16 on the side opposite to the turning direction Dt in the circumferential direction, or the side portion 22L. It suffices if they are provided on the adjacent front face portions 22F.

(第1の工夫点)
上方誘導部72は、導水路48の増加区間62が構成する例を説明したが、その具体例は特に限定されない。上方誘導部72は、たとえば、吐水部42の通水路46の底面や導水路48の棚面50に形成される凸部でもよい。この他にも、それらに形成されるとともに旋回方向Dtに向かって上り勾配となる傾斜面でもよい。
(First ingenious point)
Although the upward guidance part 72 is configured by the increased section 62 of the water conduit 48, the specific example is not particularly limited. The upward guiding portion 72 may be, for example, a convex portion formed on the bottom surface of the water conduit 46 of the water discharger 42 or the shelf surface 50 of the water conduit 48 . In addition, an inclined surface that is formed on them and slopes upward toward the turning direction Dt may be used.

上方誘導部72は、吐水部42が吐き出した洗浄水の一部を上方に誘導する例を説明したが、その全部を上方に誘導してもよい。 Although the upward guide part 72 guides part of the wash water discharged by the water discharge part 42 upward, it may also guide all of it upward.

内方誘導部74は、導水路48の増加区間62が構成する例を説明したが、その具体例は特に限定されない。内方誘導部74は、たとえば、導水路48の棚面50に形成される凸部でもよい。 Although the inward guiding portion 74 is configured by the increased section 62 of the water conduit 48, the specific example is not particularly limited. The inward guiding portion 74 may be, for example, a convex portion formed on the shelf surface 50 of the water conduit 48 .

上方誘導部72や内方誘導部74は、吐水口44の近傍とは異なる箇所に設けられてもよい。 The upward guiding portion 72 and the inward guiding portion 74 may be provided at locations other than the vicinity of the spout 44 .

上方誘導部72と内方誘導部74のそれぞれは導水路48の同じ部位(増加区間62)が構成する例を説明したが、互いに別々の部位が構成してもよいし、いずれか一方がなくともよい。 Although an example in which the upper guiding portion 72 and the inward guiding portion 74 are configured by the same portion (increase section 62) of the water conduit 48 has been described, they may be configured by separate portions, or one of them may be omitted. It's good.

導水路48の増加区間62は、吐水部42の外側に形成される例を説明したが、吐水部42の内側に形成されてもよい。 Although an example in which the increased section 62 of the water conduit 48 is formed outside the water discharger 42 has been described, it may be formed inside the water discharger 42 .

導水路48の増加区間62と他の区間68は減少区間66を介さずに段差面を介して繋がっていてもよい。 The increasing section 62 and the other section 68 of the water conduit 48 may be connected via a stepped surface without passing through the decreasing section 66 .

水洗大便器10は、前述の第1誘導流Fcを形成するように構成されるうえで上方誘導部72を備える例を説明したが、その上方誘導部72を備えていなくともよい。 Although the flush toilet 10 is configured to form the above-described first induced flow Fc and is provided with the upward guiding portion 72, the upward guiding portion 72 may not be provided.

(第2の工夫点)
第1面領域90は、鉛直面に対して傾斜した急斜面領域が構成する例を説明したが、鉛直面に対して実質的に平行な鉛直面領域が構成していてもよい。
(Second ingenuity point)
Although the first surface region 90 has been described as a steep slope region that is inclined with respect to the vertical plane, it may be formed with a vertical surface region that is substantially parallel to the vertical plane.

緩斜面領域92、94は、便鉢部16の前面部22F及び後面部22Bのうちの一方にのみ設けられていてもよい。 The gentle slope regions 92 and 94 may be provided only on one of the front surface portion 22F and the rear surface portion 22B of the toilet bowl portion 16 .

旋回流Faが後側緩斜面領域94を経由してから前側緩斜面領域92を経由する場合を考える。この場合、前述の(B)の効果を得るうえでは、後側緩斜面領域94より前側緩斜面領域92の傾斜角度θbが緩やかであればよい。 Consider the case where the swirling flow Fa passes through the rear gentle slope region 94 and then the front gentle slope region 92 . In this case, in order to obtain the aforementioned effect (B), the inclination angle θb of the front gentle slope region 92 should be gentler than that of the rear gentle slope region 94 .

第1面領域90は、便鉢部16の側面部22Rに設けられ、第2面領域92、94は、便鉢部16の前面部22F、後面部22Bに設けられる例を説明した。この他にも、平面視において、第1面領域90を第3範囲内の曲率半径の曲面状とし、第2面領域92、94を第3範囲の曲率半径より小さい曲率半径の曲面状とし、これらを便鉢部16の前面部22等と無関係の位置に設けてもよい。これは、たとえば、平面視において、リム部26の内周面が矩形状を呈しており、その矩形の四辺の辺部が曲面状の第1面領域90となり、その四辺の角部が曲面状の第2面領域92、94となる場合を想定している。 An example in which the first surface region 90 is provided on the side surface portion 22R of the toilet bowl portion 16 and the second surface regions 92 and 94 are provided on the front surface portion 22F and the rear surface portion 22B of the toilet bowl portion 16 has been described. In addition, in plan view, the first surface region 90 has a curved surface shape with a curvature radius within the third range, and the second surface regions 92 and 94 have a curved surface shape with a curvature radius smaller than the curvature radius in the third range, These may be provided at positions unrelated to the front surface portion 22 and the like of the toilet bowl portion 16 . For example, when viewed from above, the inner peripheral surface of the rim portion 26 has a rectangular shape. is assumed to be the second surface regions 92 and 94 of .

以上、本発明の実施形態や変形例について詳細に説明した。前述した実施形態や変形例は、いずれも本発明を実施するにあたっての具体例を示したものにすぎない。実施形態や変形例の内容は、本発明の技術的範囲を限定するものではなく、発明の思想を逸脱しない範囲において、構成要素の変更、追加、削除等の多くの設計変更が可能である。前述の実施形態では、このような設計変更が可能な内容に関して、「実施形態の」「実施形態では」等との表記を付して強調しているが、そのような表記のない内容でも設計変更が許容される。以上の構成要素の任意の組み合わせも、本発明の態様として有効である。図面の断面に付したハッチングは、ハッチングを付した対象の材質を限定するものではない。 The embodiments and modifications of the present invention have been described in detail above. All of the above-described embodiments and modifications merely show specific examples for carrying out the present invention. The contents of the embodiments and modifications do not limit the technical scope of the present invention, and many design changes such as alterations, additions, and deletions of constituent elements are possible without departing from the spirit of the invention. In the above-described embodiment, the content that allows such design changes is emphasized by adding notations such as "of the embodiment" and "in the embodiment", but even contents without such notations can be designed. Changes are allowed. Any combination of the above components is also effective as an aspect of the present invention. The hatching attached to the cross section of the drawing does not limit the material of the hatched object.

以上の実施形態、変形例により具体化される発明を一般化すると、以下の技術的思想が導かれる。以下、発明が解決しようとする課題に記載の態様を用いて説明する。 Generalizing the inventions embodied by the above embodiments and modifications leads to the following technical ideas. Hereinafter, description will be made using the embodiments described in the problems to be solved by the invention.

第2態様の水洗大便器は、第1態様において、前記上方誘導部により上方に誘導された洗浄水は、前記洗浄水経路上にて上向きに流れてから下向きに流れる誘導流を形成してもよい。 In the flush toilet of the second aspect, in the first aspect, the flush water guided upward by the upward guiding portion may form an induced flow that flows upward and then downward on the flush water path. good.

第3態様の水洗大便器は、第2態様において、前記誘導流は、下向きに流れる過程で他の水流と合流しつつ、その合流した他の水流とともに前記一方の面部を伝う過程で遠心力により上向きに流れてもよい。この態様によれば、誘導流が他の水流と合流しつつ上向きに流れない場合より、一方の面部での洗浄範囲を上下方向に広範囲化できる。 In the flush toilet of the third aspect, in the second aspect, the induced flow joins with another water flow in the process of flowing downward, and is caused by centrifugal force in the process of traveling along the one surface portion together with the merged other water flow. It can flow upwards. According to this aspect, compared to the case where the induced flow does not flow upward while merging with other water flows, it is possible to widen the cleaning range on one surface portion in the vertical direction.

第4態様の水洗大便器は、第1から第3態様において、前記リム部の内周面には、前記一方の面部において、前記便鉢部の上端内縁部から前記汚物受け面の外周端部までオーバーハング面が形成されることなく連続する連続面が設けられてもよい。この態様によれば、一方の面部にオーバーハング面がなくとも、その連続面を伝う洗浄水の飛び出しを抑制できる。 In the flush toilet bowl of the fourth aspect, in the first to third aspects, the inner peripheral surface of the rim portion has, on the one surface portion, a portion from the upper inner edge portion of the toilet bowl portion to the outer peripheral edge portion of the waste receiving surface. A continuous surface may be provided that continues without forming an overhang surface. According to this aspect, even if one surface portion does not have an overhang surface, it is possible to suppress the run-out of washing water along the continuous surface.

第5態様の水洗大便器は、第1から第4態様のいずれかにおいて、前記吐水部は、前記便鉢部の側面部に形成される開口部を通して前記便鉢部内に洗浄水を吐き出してもよい。この態様によれば、便鉢部の後面部に開口部を形成する場合と比べ、水洗大便器の正面側から開口部に手が届きやすくなり、良好な清掃性を得られる。 A fifth aspect of the flush toilet is the flush toilet in any one of the first to fourth aspects, wherein the water discharger discharges flush water into the toilet bowl through an opening formed in the side surface of the toilet bowl. good. According to this aspect, compared to the case where the opening is formed in the rear surface of the toilet bowl, it becomes easier to reach the opening from the front side of the flush toilet, and good cleaning performance can be obtained.

第6態様の水洗大便器は、第5態様において、前記リム部の内周面には、前記便鉢部の上端内縁部から前記汚物受け面の外周端部までオーバーハング面が形成されることなく連続する連続面が設けられ、前記リム部の内周面には、前記開口部以外の箇所にて、前記便鉢部の全周に亘る範囲で前記連続面が設けられてもよい。この態様によれば、便鉢部の周方向の広い範囲にて、拭き掃除で手の届き難いオーバーハング面が設けられないため、リム部の内周面を拭き易くなる。 In the flush toilet bowl of the sixth mode, in the fifth mode, an overhang surface is formed on the inner peripheral surface of the rim portion from the upper inner edge portion of the toilet bowl portion to the outer peripheral end portion of the waste receiving surface. A continuous surface may be provided on the inner peripheral surface of the rim portion, and the continuous surface may be provided on the inner peripheral surface of the rim portion over the entire circumference of the toilet bowl portion at a location other than the opening portion. According to this aspect, since an overhanging surface that is difficult to reach by wiping is not provided in a wide range in the circumferential direction of the toilet bowl, it becomes easy to wipe the inner peripheral surface of the rim.

第7態様の水洗大便器は、第1から第6態様のいずれかにおいて、前記洗浄水を前記旋回流の旋回方向に導く導水路を備え、前記導水路は、前記導水路の下側内隅部を構成する曲面部を有し、前記曲面部は、前記旋回方向に向かうにつれて曲率半径が連続的に増加する増加区間を有し、前記上方誘導部は、前記増加区間が構成してもよい。この態様によれば、導水路の底面に広範囲で凹凸を形成することなく上方誘導部を構成でき、良好な意匠性を得られる。 A seventh aspect of the flush toilet is, in any one of the first to sixth aspects, provided with a water conduit for guiding the flush water in the swirl direction of the swirl flow, wherein the water conduit is located at a lower inner corner of the water conduit. The curved surface portion may have an increasing section in which the radius of curvature continuously increases toward the turning direction, and the upward guiding portion may be configured by the increasing section. . According to this aspect, the upward guide portion can be configured without forming unevenness in a wide range on the bottom surface of the water conduit, and good design can be obtained.

第8態様の水洗大便器は、第7態様において、前記曲面部は、前記増加区間より前記旋回方向に設けられ、前記旋回方向に向かうにつれて曲率半径が連続的に減少する減少区間を有してもよい。この態様によれば、導水路の曲面部に増加区間がある場合に、増加区間より旋回方向に設けられる曲率半径の小さい他の区間と増加区間の間で目立つような段差面が形成されず、良好な意匠性を得られる。 In the flush toilet of the eighth mode, in the seventh mode, the curved surface portion has a decreasing section provided in the turning direction from the increasing section and having a decreasing section in which the radius of curvature continuously decreases toward the turning direction. good too. According to this aspect, when there is an increased section in the curved surface portion of the water conduit, a conspicuous stepped surface is not formed between the increased section and another section having a smaller curvature radius provided in the turning direction than the increased section, A good design property can be obtained.

第9態様の水洗大便器は、第1から第8態様のいずれかにおいて、前記上方誘導部により上方に誘導される洗浄水に上方から接触するオーバーハング面を備えてもよい。この態様によれば、洗浄水供給装置からの洗浄水供給量が急激に増大してしまい、上方誘導部により洗浄水が大きく上昇しようとした場合でも、オーバーハング面により洗浄水の上昇を規制できる。 A flush toilet bowl of a ninth aspect may be provided with an overhang surface in contact with flush water guided upward by the upward guiding part in any one of the first to eighth aspects. According to this aspect, even if the amount of cleansing water supplied from the cleansing water supply device suddenly increases and the cleansing water tries to rise greatly by the upward guide portion, the overhang surface can regulate the rise of the cleansing water. .

10…水洗大便器、16…便鉢部、16a…上端内縁部、16b…一端部、16d…左右中央部、22B…後面部、22F…前面部、22L…左側面部、22R…右側面部、22X…一方の面部、24…汚物受け面、24a…外周端部、24b…下端縁部、26…リム部、32…開口部、40…連続面、42…吐水部、44…吐水口、48…導水路、50…棚面、50a…内周端部、56…凹曲面部、58…曲面部、62…増加区間、66…減少区間、70…洗浄水経路、72…上方誘導部、74…内方誘導部、76…オーバーハング面、90…第1面領域、92,94…第2面領域。 10 Flush toilet bowl 16 Toilet bowl 16a Top inner edge 16b One end 16d Right and left center 22B Rear surface 22F Front surface 22L Left side 22R Right side 22X 1 side surface 24 filth receiving surface 24a outer peripheral edge 24b lower edge 26 rim 32 opening 40 continuous surface 42 spout 44 spout 48 Water conduit 50 Shelf surface 50a Inner peripheral end 56 Concave surface 58 Curved surface 62 Increasing section 66 Decreasing section 70 Washing water path 72 Upper guide section 74 Inner guiding portion 76 Overhang surface 90 First surface region 92, 94 Second surface region.

Claims (8)

鉢状の汚物受け面を有する便鉢部と、
前記便鉢部の上端側部分を形成するリム部と、
前記便鉢部内に洗浄水を吐き出すことによって旋回流を形成する吐水部と、を備え、
前記便鉢部の前面部及び後面部のうちの一方の面部には、前記便鉢部の前後方向の一端部が設けられ、それらのうちの他方の面部には前記便鉢部の前後方向の他端部が設けられ
前記旋回流は、前記一端部を先に経由してから前記他端部を経由し、
前記吐水部から前記一端部に至る洗浄水経路上に設けられ、前記洗浄水の少なくとも一部を上方に誘導する上方誘導部を備え
記上方誘導部により上方に誘導された洗浄水は、前記洗浄水経路上にて上向きに流れてから前記洗浄水経路上にて下向きに流れる誘導流を形成する水洗大便器。
a toilet bowl portion having a bowl-shaped waste receiving surface;
a rim portion forming an upper end portion of the toilet bowl;
a water discharger for forming a swirling flow by discharging wash water into the toilet bowl;
One end of the toilet bowl in the front-rear direction is provided on one of the front surface and the rear surface of the toilet bowl, and the other surface of the toilet bowl is provided with the front-rear direction of the toilet bowl. The other end is provided, and the swirl flow first passes through the one end and then passes through the other end,
an upward guiding part provided on the washing water path from the water discharge part to the one end and guiding at least part of the washing water upward ;
The flush toilet of the flush toilet, wherein the flush water guided upward by the upward guiding portion forms an induced flow that flows upward on the flush water path and then flows downward on the flush water path .
前記誘導流は、下向きに流れる過程で他の水流と合流しつつ、その合流した他の水流とともに前記一方の面部を伝う過程で遠心力により上向きに流れる請求項に記載の水洗大便器。 2. The flush toilet according to claim 1 , wherein the induced flow joins with another water flow in the process of flowing downward, and flows upward due to centrifugal force in the process of traveling along the one surface along with the merged water flow. 前記リム部の内周面には、前記一方の面部において、前記便鉢部の上端内縁部から前記汚物受け面の外周端部までオーバーハング面が形成されることなく連続する連続面が設けられる請求項1からのいずれかに記載の水洗大便器。 On the inner peripheral surface of the rim portion, the one surface portion is provided with a continuous surface that extends from the upper inner edge portion of the toilet bowl portion to the outer peripheral end portion of the filth receiving surface without forming an overhang surface. The flush toilet bowl according to any one of claims 1 and 2 . 前記吐水部は、平面視における前記便鉢部の上端内縁部の中心に対して前記他端部側に設けられ、
前記吐水部は、前記便鉢部の側面部に形成される開口部を通して前記便鉢部内に洗浄水を吐き出す請求項1からのいずれかに記載の水洗大便器。
The water discharger is provided on the other end side with respect to the center of the inner edge of the upper end of the toilet bowl in plan view,
The flush toilet according to any one of claims 1 to 3 , wherein the water discharger discharges cleansing water into the toilet bowl through an opening formed in a side surface of the toilet bowl.
前記リム部の内周面には、前記便鉢部の上端内縁部から前記汚物受け面の外周端部までオーバーハング面が形成されることなく連続する連続面が設けられ、
前記リム部の内周面には、前記開口部以外の箇所にて、前記便鉢部の全周に亘る範囲で前記連続面が設けられる請求項に記載の水洗大便器。
The inner peripheral surface of the rim portion is provided with a continuous surface that continues from the upper inner edge portion of the toilet bowl portion to the outer peripheral end portion of the waste receiving surface without forming an overhang surface,
5. The flush toilet according to claim 4 , wherein the continuous surface is provided on the inner peripheral surface of the rim portion over the entire circumference of the toilet bowl portion at locations other than the opening portion.
前記洗浄水を前記旋回流の旋回方向に導く導水路を備え、
前記導水路は、前記導水路の下側内隅部を構成する曲面部を有し、
前記曲面部は、前記旋回方向に向かうにつれて曲率半径が連続的に増加する増加区間を有し、
前記上方誘導部は、前記増加区間が構成する請求項1からのいずれかに記載の水洗大便器。
a water conduit for guiding the wash water in the swirl direction of the swirl flow;
The water conduit has a curved surface portion forming a lower inner corner of the water conduit,
The curved surface portion has an increasing section in which the radius of curvature continuously increases toward the turning direction,
The flush toilet according to any one of claims 1 to 5 , wherein the upward guiding portion is configured by the increasing section.
前記曲面部は、前記増加区間より前記旋回方向に設けられ、前記旋回方向に向かうにつれて曲率半径が連続的に減少する減少区間を有する請求項に記載の水洗大便器。 7. The flush toilet according to claim 6 , wherein the curved surface portion has a decreasing section which is provided in the turning direction from the increasing section and in which the radius of curvature continuously decreases toward the turning direction. 前記上方誘導部により上方に誘導される洗浄水に上方から接触するオーバーハング面を備える請求項1からのいずれかに記載の水洗大便器。 8. The flush toilet according to any one of claims 1 to 7, further comprising an overhang surface that contacts flush water guided upward by said upward guiding portion from above.
JP2018152214A 2018-08-13 2018-08-13 flush toilet Active JP7240837B2 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013087195A1 (en) 2011-12-14 2013-06-20 Geberit International Ag Water closet
JP2015196959A (en) 2014-03-31 2015-11-09 Toto株式会社 Flush toilet bowl
JP2017048599A (en) 2015-09-01 2017-03-09 株式会社Lixil Flush toilet bowl
JP2018112005A (en) 2017-01-12 2018-07-19 Toto株式会社 Water closet

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013087195A1 (en) 2011-12-14 2013-06-20 Geberit International Ag Water closet
JP2015196959A (en) 2014-03-31 2015-11-09 Toto株式会社 Flush toilet bowl
JP2017048599A (en) 2015-09-01 2017-03-09 株式会社Lixil Flush toilet bowl
JP2018112005A (en) 2017-01-12 2018-07-19 Toto株式会社 Water closet

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