JP7401583B2 - toilet bowl body - Google Patents

toilet bowl body Download PDF

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JP7401583B2
JP7401583B2 JP2022038347A JP2022038347A JP7401583B2 JP 7401583 B2 JP7401583 B2 JP 7401583B2 JP 2022038347 A JP2022038347 A JP 2022038347A JP 2022038347 A JP2022038347 A JP 2022038347A JP 7401583 B2 JP7401583 B2 JP 7401583B2
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water
flow
toilet bowl
receiving surface
toilet
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JP2022066577A (en
JP2022066577A5 (en
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隆志 丸山
卓臣 上田
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Lixil Corp
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Lixil Corp
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Priority to JP2023206597A priority patent/JP2024015253A/en
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Description

本発明は、便器本体に関する。 The present invention relates to a toilet main body.

従来より、汚物を排出するための洗浄方式に関して種々の検討がなされている。特許文献1には、便鉢部の左右片側の側方領域を後方に向かう旋回流を形成し、その旋回流の一部を便鉢部の溜水部に後方から流入させることで、便器排水路の入口に汚物を押し込むための誘導流を形成できる水洗大便器が開示されている。 Conventionally, various studies have been made regarding cleaning methods for discharging filth. Patent Document 1 discloses that a swirling flow is formed rearward in the left and right side areas of the toilet bowl, and a part of the swirling flow is allowed to flow into the water storage part of the toilet bowl from the rear, thereby draining the toilet bowl. A flush toilet is disclosed that is capable of creating a guided flow to force waste into a duct entrance.

特開2016-89431号公報JP2016-89431A

便鉢部の溜水部に後方から洗浄水を流入させることで、便器排水路の入口に汚物を押し込む誘導流を形成する場合を考える。この場合、良好な汚物排出能力を得るうえで、溜水部への後方からの洗浄水の流入量を増大できるとよい。本発明者は、このような観点のもと、汚物排出能力の向上を図るうえで、新たな方策があるとの知見を得た。 Consider a case where washing water flows into the water reservoir of the toilet bowl from the rear to form a guided flow that pushes waste into the entrance of the toilet drainage channel. In this case, in order to obtain a good dirt discharge ability, it is preferable to increase the amount of washing water flowing into the water storage section from the rear. Based on this viewpoint, the present inventors have found that there is a new measure for improving the filth discharge ability.

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、溜水部に後方から流入する水流を用いて汚物を排出するうえで、汚物排出能力の向上を図れ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 problems, and one of its objects is to provide a technology that can improve the filth discharging ability when filth is discharged using a water flow flowing into a water storage section from the rear. Our goal is to provide the following.

前述の課題を解決するための本発明の第1態様は便器本体である。第1態様の便器本体は、鉢状の汚物受け面、及び、前記汚物受け面の下端縁から下方に窪む溜水部を有する便鉢部と、前記便鉢部の底部に接続される排水部と、前記便鉢部内に周方向の一方側に向けて第1吐水孔から洗浄水を吐き出すことによって、前記溜水部より後側に位置する前記汚物受け面の後側領域を前記周方向の一方側に向けて伝う水流を形成する第1吐水部と、を備え、前記溜水部は、前記溜水部の左右片側に設けられる立壁面に接触しつつ前記溜水部に後方から流入する水流によって、前記排水部に汚物を押し込む誘導流を形成するように構成され、前記汚物受け面は、前記吐水孔から吐き出された洗浄水を周方向の一方側に導くための棚面を有し、前記棚面は、前記便鉢部の径方向に沿った切断面での形状が平坦面であり、前記後側領域での前記棚面の径方向での勾配は、前記溜水部より左右いずれかに位置する前記汚物受け面の横側領域での前記棚面の径方向での勾配より大きくなるように設定される。 A first aspect of the present invention for solving the above-mentioned problems is a toilet main body. The toilet main body of the first aspect includes a toilet bowl portion having a bowl-shaped waste receiving surface, a water storage portion recessed downward from the lower edge of the waste receiving surface, and a drain connected to the bottom of the toilet bowl portion. and by discharging wash water from the first water spout hole toward one side in the circumferential direction within the toilet bowl portion, the rear region of the waste receiving surface located on the rear side of the water reservoir portion is flushed in the circumferential direction. a first water spouting part that forms a water flow that flows toward one side of the water collecting part, and the water collecting part flows into the water collecting part from the rear while being in contact with a vertical wall surface provided on one side of the left and right sides of the water collecting part. The waste receiving surface is configured to form a guided flow that pushes waste into the drainage part by the water flow, and the waste receiving surface has a shelf surface for guiding the washing water discharged from the water spouting hole to one side in the circumferential direction. The shelf surface has a flat shape in a cut plane along the radial direction of the toilet bowl portion, and the slope of the shelf surface in the radial direction in the rear region is smaller than the water storage portion. The slope is set to be larger than the slope in the radial direction of the shelf surface in the lateral region of the dirt receiving surface located on either the left or right side.

第1態様によれば、後側領域での棚面の勾配を横側領域での棚面の勾配以下にする場合と比べ、後側領域の棚面を周方向に伝う洗浄水の一部を適度に溜水部に流し落とし易くなる。よって、溜水部への後方からの洗浄水の流入量を増大でき、汚物排出能力の向上を図れる。 According to the first aspect, compared to the case where the slope of the shelf surface in the rear region is made equal to or less than the slope of the shelf surface in the side region, a part of the washing water flowing in the circumferential direction on the shelf surface in the rear region is reduced. It becomes easy to wash down into the water reservoir. Therefore, the amount of washing water flowing into the water storage section from the rear can be increased, and the dirt discharge capability can be improved.

第1実施形態の便器本体の斜視図である。It is a perspective view of a toilet main body of a 1st embodiment. 第1実施形態の便器本体の平面図である。FIG. 2 is a plan view of the toilet main body of the first embodiment. 第1実施形態の便器本体の側面断面図である。It is a side cross-sectional view of the toilet main body of a 1st embodiment. 図3のA-A線断面図である。FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3. 図2のB-B線断面の一部を示す図である。3 is a diagram showing a part of a cross section taken along line BB in FIG. 2. FIG. 図5のC-C線端面の一部を主に示す図である。6 is a diagram mainly showing a part of the end surface taken along the line CC in FIG. 5. FIG. 第1実施形態の便器本体の分解斜視図である。FIG. 2 is an exploded perspective view of the toilet main body of the first embodiment. 図3のD-D線断面図である。4 is a sectional view taken along the line DD in FIG. 3. FIG. 図5のE-E線断面の一部を示す図である。6 is a diagram showing a part of a cross section taken along line EE in FIG. 5. FIG. 第1実施形態の便器本体の他の平面図である。It is another top view of the toilet main body of 1st Embodiment. 第1実施形態の便器本体の更に他の平面図である。It is yet another plan view of the toilet main body of a 1st embodiment. 図3の一部の拡大図である。4 is an enlarged view of a portion of FIG. 3. FIG. 図2のB-B線端面の一部を主に示す図である。3 is a diagram mainly showing a part of the end surface taken along the line BB in FIG. 2. FIG. 第1段階での洗浄水の流れ方を示す図である。FIG. 3 is a diagram showing how the washing water flows in the first stage. 第2段階での洗浄水の流れ方を示す図である。FIG. 6 is a diagram showing how washing water flows in a second stage. 第2段階での洗浄水の流れ方を示す他の図である。FIG. 7 is another diagram showing how the washing water flows in the second stage. 第1実施形態の棚面の勾配を示すグラフである。It is a graph which shows the slope of the shelf surface of 1st Embodiment. 第1実施形態の連結面の曲率半径を示すグラフである。It is a graph which shows the curvature radius of the connection surface of 1st Embodiment. 図4の一部の拡大図である。5 is an enlarged view of a portion of FIG. 4. FIG. 図20(a)は、図3のF-F線断面図であり、図20(b)は、図3のG-G線断面図であり、図20(c)は、図3のH-H線断面図である。20(a) is a cross-sectional view taken along line FF in FIG. 3, FIG. 20(b) is a cross-sectional view taken along line GG in FIG. 3, and FIG. 20(c) is a cross-sectional view taken along line H-- It is an H line sectional view.

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。本明細書での「接触」とは、特に明示がない限り、言及している二者が直接的に接触する場合の他に、他の部材を介して間接的に接触する場合も含む。 Hereinafter, in the embodiments and modified examples, the same components are denoted by the same reference numerals, and redundant explanations will be omitted. In each drawing, for convenience of explanation, some of the constituent elements are omitted as appropriate, and the dimensions of the constituent elements are enlarged or reduced as appropriate. The drawings should be viewed according to the direction of the symbols. Unless otherwise specified, "contact" as used herein includes not only direct contact between the two mentioned but also indirect contact via another member.

(第1の実施の形態)
まず、第1実施形態の水洗大便器10の第1の工夫点を説明する。図1は、第1実施形態の水洗大便器10に用いられる便器本体12の斜視図である。図2は、便器本体12の平面図である。図3は、便器本体12の側面断面図である。図4は、図3のA-A線断面図である。
(First embodiment)
First, the first point of improvement of the flush toilet 10 of the first embodiment will be explained. FIG. 1 is a perspective view of a toilet main body 12 used in a flush toilet 10 of the first embodiment. FIG. 2 is a plan view of the toilet main body 12. FIG. 3 is a side sectional view of the toilet main body 12. FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3.

水洗大便器10は、便器本体12と、洗浄水供給装置14と、を備える。図4に示すように、本実施形態の洗浄水供給装置14は、貯水タンク(不図示)、分配器16等を用いて構成される。 The flush toilet 10 includes a toilet main body 12 and a flush water supply device 14. As shown in FIG. 4, the wash water supply device 14 of this embodiment is configured using a water storage tank (not shown), a distributor 16, and the like.

本実施形態の便器本体12は陶器を素材とするが、樹脂等を素材としてもよい。本実施形態の便器本体12は洋風大便器である。本実施形態の便器本体12は、トイレ室の床面Fs(図3参照)上に設置される床置き式である。 Although the toilet main body 12 of this embodiment is made of ceramic, it may also be made of resin or the like. The toilet bowl main body 12 of this embodiment is a Western-style toilet bowl. The toilet main body 12 of this embodiment is a floor-standing type installed on the floor surface Fs (see FIG. 3) of the toilet room.

以下、水洗大便器10の構成要素の位置関係に関して、互いに直交する三つの方向を用いて説明する。この方向とは、便器本体12の前後方向X、左右方向Y及び上下方向Zである。前後方向X、左右方向Yは水平方向であり、便器本体12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前後左右と対応する。上下方向Zは鉛直方向である。 Hereinafter, the positional relationship of the components of the flush toilet 10 will be explained using three mutually orthogonal directions. These directions are the front-rear direction X, the left-right direction Y, and the up-down direction Z of the toilet main body 12. The front-rear direction X and the left-right direction Y are horizontal directions, and correspond to the front, rear, right, and left directions of a seated person who sits in a normal posture on a toilet seat (not shown) attached to the toilet main body 12. The vertical direction Z is the vertical direction.

また、本明細書では、水洗大便器10の構成要素の位置関係に関して、便器本体12の便鉢部18の周方向、径方向を用いて説明する。ここでの「周方向」とは、便器本体12を上方から見て、その便鉢部18の上端内縁部18aの中心Cp(図2参照)周りを回る方向をいう。また、「径方向」とは、その中心Cpを通る鉛直線に直交する方向をいう。 Further, in this specification, the positional relationship of the components of the flush toilet 10 will be explained using the circumferential direction and the radial direction of the toilet bowl portion 18 of the toilet main body 12. The "circumferential direction" here refers to the direction in which the toilet bowl body 12 is viewed from above and rotates around the center Cp (see FIG. 2) of the upper inner edge portion 18a of the toilet bowl portion 18. Moreover, the "radial direction" refers to a direction perpendicular to a vertical line passing through the center Cp.

図2、図3を参照する。便器本体12は便鉢部18を有する。便鉢部18の上端内縁部18aは、便器本体12の上面部20に連なり、その上面部20の後部には便座を取り付けるための取付孔22が設けられる。 Refer to FIGS. 2 and 3. The toilet main body 12 has a toilet bowl portion 18. The upper inner edge 18a of the toilet bowl portion 18 is continuous with the upper surface portion 20 of the toilet main body 12, and a mounting hole 22 for attaching a toilet seat is provided at the rear of the upper surface portion 20.

便鉢部18は、汚物を受けるための鉢状の汚物受け面24と、汚物受け面24の下端縁から下方に窪む溜水部26と、を備える。汚物受け面24は、平面視での曲率半径が前端部24aにおいて最小となる形状である。 The toilet bowl portion 18 includes a bowl-shaped filth receiving surface 24 for receiving filth, and a water reservoir portion 26 recessed downward from the lower edge of the filth receiving surface 24. The dirt receiving surface 24 has a shape in which the radius of curvature in plan view is the smallest at the front end portion 24a.

便鉢部18は、左右一方側となる左側(図2では紙面の右側)の左側方部分18b(第1側方部分)と、左右他方側(図2では紙面の左側)の右側方部分18c(第2側方領域)とを有する。左側方部分18bは、便鉢部18の左右中心線Lcに対して左右一方側に配置される便鉢部18の一部分であり、右側方部分18cは、その左右中心線Lcに対して左右他方側に配置される便鉢部18の一部分である。左右中心線Lcとは平面視において、便鉢部18の内面部分の左右方向Yに沿った寸法を二等分し、前後方向Xに沿って延びる直線をいう。 The toilet bowl portion 18 has a left side portion 18b (first side portion) on the left side (the right side in FIG. 2), which is one of the left and right sides, and a right side portion 18c on the other side (the left side in the page in FIG. 2). (second lateral region). The left side part 18b is a part of the toilet bowl part 18 that is arranged on one side of the left and right sides with respect to the left and right center line Lc of the toilet bowl part 18, and the right side part 18c is a part of the toilet bowl part 18 that is arranged on the other side of the left and right sides with respect to the left and right center line Lc of the toilet bowl part 18. This is a part of the toilet bowl part 18 arranged on the side. The left-right center line Lc refers to a straight line that bisects the dimension of the inner surface of the toilet bowl portion 18 along the left-right direction Y and extends along the front-back direction X in plan view.

図4に示すように、便器本体12は、便鉢部18内に洗浄水を吐き出すための吐水部28A、28Bを備える。吐水部28A、28Bには、便鉢部18の右側方部分18cに形成される第1吐水孔30Aを有する第1吐水部28Aと、便鉢部18の左側方部分18bに形成される第2吐水孔30Bを有する第2吐水部28Bとが含まれる。本実施形態の第1吐水孔30Aや第2吐水孔30Bは、溜水部26より後方にて便鉢部18の後部に形成される。本実施形態の第1吐水孔30Aは、溜水部26より左右他方側となる右側に形成され、本実施形態の第2吐水孔30Bは、溜水部26より左右一方側となる左側に形成される。 As shown in FIG. 4, the toilet main body 12 includes water spouting parts 28A and 28B for spewing out flush water into the toilet bowl part 18. The water spouting parts 28A and 28B include a first water spouting part 28A having a first water spouting hole 30A formed in the right side part 18c of the toilet bowl part 18, and a second water spouting part 28A having a first water spouting hole 30A formed in the left side part 18b of the toilet bowl part 18. A second water spouting section 28B having a water spouting hole 30B is included. The first water spouting hole 30A and the second water spouting hole 30B of this embodiment are formed at the rear of the toilet bowl portion 18 behind the water storage portion 26. The first water spouting hole 30A of the present embodiment is formed on the right side, which is the other left and right side of the water reservoir 26, and the second water spouting hole 30B of this embodiment is formed on the left side, which is the other left and right side of the water reservoir 26. be done.

第1吐水孔30Aは前方に向けて開放しており、便鉢部18内に周方向の一方側(図9の紙面では反時計回り方向。以下、単に反時計回り方向ともいう)に洗浄水を吐き出す。第2吐水孔30Bは、左右他方側となる右側に向けて開放しており、便鉢部18内に反時計回り方向に洗浄水を吐き出す。 The first water discharge hole 30A is open toward the front, and flush water flows into the toilet bowl portion 18 on one side in the circumferential direction (counterclockwise direction in the paper of FIG. 9; hereinafter also simply referred to as the counterclockwise direction). Spit out. The second water spouting hole 30B is open toward the right side, which is the other side of the left and right sides, and discharges washing water into the toilet bowl portion 18 in a counterclockwise direction.

第1吐水部28Aは、第1吐水孔30Aに洗浄水を供給するための第1通水路32Aを有する。第2吐水部28Bは、第2吐水孔30Bに洗浄水を供給するための第2通水路32Bを有する。第1通水路32Aは便器本体12の右側の側方部分に設けられ、第2通水路32Bは便器本体12の左側の側方部分に設けられる。第1通水路32Aや第2通水路32Bには、洗浄水供給装置14から洗浄水が供給される。 The first water spouting section 28A has a first water passage 32A for supplying cleaning water to the first water spouting hole 30A. The second water spouting section 28B has a second water passage 32B for supplying wash water to the second water spouting hole 30B. The first water passage 32A is provided on the right side portion of the toilet main body 12, and the second water passage 32B is provided on the left side portion of the toilet main body 12. Washing water is supplied from the washing water supply device 14 to the first water passage 32A and the second water passage 32B.

図5は、図2のB-B線断面の一部を示す図である。図6は、図5のC-C線端面の一部を主に示す図である。便鉢部18は、便鉢部18の上端内縁部18aから垂下する垂下壁部34を有する。垂下壁部34の内周面は便鉢部18の上端内縁部18aから汚物受け面24の外周端部24bまで下方に連続している。垂下壁部34の内周面には、便鉢部18の上端内縁部18aから汚物受け面24の外周端部24bまでの範囲で水平面が設けられていないということである。これにより、垂下壁部34の内周面に水平面が設けられる場合と比べ、垂下壁部34の内周面を拭き易くなる。 FIG. 5 is a diagram showing a part of a cross section taken along line BB in FIG. 2. FIG. 6 is a diagram mainly showing a part of the end surface taken along the line CC in FIG. The toilet bowl portion 18 has a hanging wall portion 34 that hangs down from the upper inner edge portion 18a of the toilet bowl portion 18. The inner circumferential surface of the hanging wall portion 34 continues downward from the upper inner edge portion 18a of the toilet bowl portion 18 to the outer circumferential edge portion 24b of the waste receiving surface 24. This means that no horizontal surface is provided on the inner circumferential surface of the hanging wall portion 34 in the range from the upper inner edge portion 18a of the toilet bowl portion 18 to the outer circumferential edge portion 24b of the waste receiving surface 24. This makes it easier to wipe the inner circumferential surface of the hanging wall 34 compared to a case where the inner circumferential surface of the hanging wall 34 is provided with a horizontal surface.

垂下壁部34の内周面は、本実施形態において、上端内縁部18aから下方に向かうにつれて径方向内側に延びるように形成される。この他にも、垂下壁部34の内周面は、上端内縁部18aから下方に向かうにつれて径方向外側に延びるようなオーバーハング形状に形成されてもよい。 In this embodiment, the inner circumferential surface of the hanging wall portion 34 is formed to extend radially inward from the upper end inner edge portion 18a as it goes downward. In addition, the inner circumferential surface of the hanging wall portion 34 may be formed in an overhang shape that extends radially outward from the upper end inner edge portion 18a as it goes downward.

本実施形態の垂下壁部34は、図1に示すように、便鉢部18の全周に亘る範囲に設けられる。本実施形態の垂下壁部34の内周面は、略全周に亘る範囲において、吐水孔30A、30B以外の箇所で、滑らかに連なっている。垂下壁部34は、便鉢部18の周方向の全周に亘る範囲のうち周方向の半分以上の範囲に少なくとも設けられていてもよい。この他にも、垂下壁部34は、便鉢部18の周方向の全周に亘る範囲のうち周方向の大部分の範囲に少なくとも設けられていてもよい。ここでの大部分とは、たとえば、便鉢部18の周方向の全周に亘る範囲のうち80%以上の範囲をいう。 As shown in FIG. 1, the hanging wall portion 34 of this embodiment is provided over the entire circumference of the toilet bowl portion 18. The inner circumferential surface of the hanging wall portion 34 of this embodiment is smoothly continuous over substantially the entire circumference at locations other than the water spouting holes 30A and 30B. The hanging wall portion 34 may be provided in at least half or more of the entire circumference of the toilet bowl portion 18 in the circumferential direction. In addition to this, the hanging wall portion 34 may be provided at least in most of the circumferential range of the entire circumference of the toilet bowl portion 18 . The majority here refers to, for example, 80% or more of the entire circumference of the toilet bowl portion 18 in the circumferential direction.

以下、第1吐水部28Aと第2吐水部28Bは多くの構成が共通するため、その共通する構成に関して第1吐水部28Aを示す図面を参照しながら説明する。図5、図6を参照する。第1吐水部28Aの第1吐水孔30Aは垂下壁部34を貫通している。第1吐水孔30Aの内下面30aは、第1通水路32Aの内下面32aと、便鉢部18の内面としての汚物受け面24とを滑らかに連ねている。本明細書での「滑らかに」とは、言及している面にでこぼこや段差がなく、すべすべしているさまをいう。第1吐水孔30Aの内上面30bは、第1通水路32Aの内上面32bより下方に設けられる。 Hereinafter, since the first water discharging section 28A and the second water discharging section 28B have many configurations in common, the common configuration will be described with reference to the drawing showing the first water discharging section 28A. Refer to FIGS. 5 and 6. The first water spouting hole 30A of the first water spouting portion 28A penetrates the hanging wall portion 34. The inner lower surface 30a of the first water discharge hole 30A smoothly connects the inner lower surface 32a of the first water passage 32A and the waste receiving surface 24 as the inner surface of the toilet bowl portion 18. As used herein, "smooth" refers to a surface that is smooth and free of unevenness or steps. The inner upper surface 30b of the first water discharge hole 30A is provided below the inner upper surface 32b of the first water passage 32A.

垂下壁部34は、第1吐水孔30Aを形成するとともに第1吐水孔30Aより上方に設けられる第1孔形成部36Aを有する。第1孔形成部36Aの内周面は、便鉢部18の上端内縁部18aから第1吐水孔30Aまでの範囲で滑らかに連なっている。第1孔形成部36Aの内周面は、第1孔形成部36Aと周方向両側に隣接する垂下壁部34の他部分の内周面と滑らかに連なっている。 The hanging wall portion 34 has a first hole forming portion 36A that forms a first water spouting hole 30A and is provided above the first water spouting hole 30A. The inner circumferential surface of the first hole forming part 36A is smoothly continuous in the range from the upper inner edge part 18a of the toilet bowl part 18 to the first water spouting hole 30A. The inner circumferential surface of the first hole forming part 36A is smoothly continuous with the inner circumferential surface of the other part of the hanging wall part 34 adjacent to the first hole forming part 36A on both sides in the circumferential direction.

これにより、第1吐水孔30Aを形成する垂下壁部34の第1孔形成部36Aの内周面が便鉢部18の上端内縁部18aに滑らかに連なった箇所に設けられる。よって、便鉢部18の上端内縁部18aから奥まった箇所に第1吐水孔30Aを形成する壁部が配置される場合と比べ、便鉢部18の上端内縁部18aとともに垂下壁部34の第1孔形成部36Aの内周面を拭き易くなり、良好な清掃性を得られる。 As a result, the inner circumferential surface of the first hole forming portion 36A of the hanging wall portion 34 forming the first water spouting hole 30A is provided at a location smoothly connected to the upper inner edge portion 18a of the toilet bowl portion 18. Therefore, compared to the case where the wall forming the first water spout hole 30A is arranged at a position recessed from the upper inner edge 18a of the toilet bowl 18, the inner edge 18a of the upper end of the toilet bowl 18 and the inner edge 18a of the hanging wall 34 are It becomes easier to wipe the inner peripheral surface of the one-hole forming part 36A, and good cleaning performance can be obtained.

また、便鉢部18の上端内縁部18aが第1吐水孔30Aを形成する場合と比べ、第1吐水孔30Aの大きさが小さくなり、良好な意匠性を得られる。また、便鉢部18の上端内縁部18aが第1吐水孔30Aを形成する場合と比べ、第1吐水孔30Aから吐き出された洗浄水が上端内縁部18aを伝って、便器本体12の上面部20まで伝う事態を避け易くなる。また、便鉢部18の上端内縁部18aが第1吐水孔30Aを形成する場合と比べ、便鉢部18内を流れる洗浄水の高さを抑えられ、洗浄水の飛沫が便鉢部18の外部に飛散する事態を避け易くなる。 Moreover, compared to the case where the upper inner edge portion 18a of the toilet bowl portion 18 forms the first water spouting hole 30A, the size of the first water spouting hole 30A is smaller, and a good design can be obtained. Moreover, compared to the case where the upper inner edge 18a of the toilet bowl part 18 forms the first water spouting hole 30A, the flushing water discharged from the first water spouting hole 30A flows along the upper inner edge 18a of the toilet bowl main body 12. It will be easier to avoid situations where the situation reaches 20. Moreover, compared to the case where the upper inner edge 18a of the toilet bowl part 18 forms the first water spouting hole 30A, the height of the flushing water flowing inside the toilet bowl part 18 can be suppressed, and the splashes of the flushing water can be prevented from forming the toilet bowl part 18. This makes it easier to avoid situations where the particles are scattered outside.

以上の効果を得る観点からは、次の条件を満たすと好ましい。垂下壁部34の第1孔形成部36Aの高さHaは、便鉢部18の上端内縁部18aの上端から第1吐水孔30Aの内上面30bまでの高さで定義される。また、便鉢部18の上端内縁部18aの上端から第1吐水孔30Aの内下面30aまでの高さをHbという。このとき、垂下壁部34の第1孔形成部36Aの高さHaは、高さHbの半分以上の大きさに設定されると好ましい。この条件は、本発明者による実験的な検討に基づき導き出したものである。これにより、垂下壁部34の第1孔形成部36Aの内周面が拭き掃除するうえで適度な大きさとなり、その内周面をより拭き易くなり、より良好な清掃性を得られる。 From the viewpoint of obtaining the above effects, it is preferable that the following conditions are satisfied. The height Ha of the first hole forming portion 36A of the hanging wall portion 34 is defined as the height from the upper end of the upper inner edge portion 18a of the toilet bowl portion 18 to the inner upper surface 30b of the first water spouting hole 30A. Moreover, the height from the upper end of the upper end inner edge part 18a of the toilet bowl part 18 to the inner lower surface 30a of 30 A of 1st water discharge holes is called Hb. At this time, it is preferable that the height Ha of the first hole forming portion 36A of the hanging wall portion 34 is set to be equal to or more than half the height Hb. These conditions were derived based on experimental studies by the inventor. As a result, the inner circumferential surface of the first hole-forming portion 36A of the hanging wall portion 34 has an appropriate size for wiping, making the inner circumferential surface easier to wipe and achieving better cleaning performance.

また、第1吐水孔30Aの大きさが小さくなり、より良好な意匠性を得られる。また、第1吐水孔30Aから吐き出された洗浄水が上端内縁部18aまで伝わり難くなり、その洗浄水が便器本体12の上面部20まで伝う事態をより避け易くなる。また、便鉢部18内を流れる洗浄水の高さをより抑えられ、洗浄水の飛沫が便鉢部18の外部に飛散する事態をより避け易くなる。 Moreover, the size of the first water discharge hole 30A is reduced, and a better design can be obtained. Further, the flushing water discharged from the first water spouting hole 30A becomes difficult to reach the upper inner edge portion 18a, making it easier to prevent the flushing water from traveling to the upper surface portion 20 of the toilet main body 12. Furthermore, the height of the flushing water flowing inside the toilet bowl section 18 can be further suppressed, making it easier to avoid splashes of the flushing water to the outside of the toilet bowl section 18.

また、第1吐水孔30Aの内下面30aは、第1通水路32Aの内下面32aと、便鉢部18の内面としての汚物受け面24とを滑らかに連ねている。よって、第1通水路32A内の水が、第1通水路32A内にとどまることなく、第1吐水孔30Aの内下面30aを伝って便鉢部18内に流れ易くなり、良好な衛生性を得られる。 Moreover, the inner lower surface 30a of the first water spouting hole 30A smoothly connects the inner lower surface 32a of the first water passage 32A and the filth receiving surface 24 as the inner surface of the toilet bowl portion 18. Therefore, the water in the first water passage 32A does not remain in the first water passage 32A, but easily flows into the toilet bowl part 18 along the inner lower surface 30a of the first water spout 30A, thereby providing good hygiene. can get.

ここまで第1吐水部28Aに関して詳細に説明したが、第2吐水部28Bでも多くの点で共通する。つまり、第2吐水部28Bの第2吐水孔30Bも垂下壁部34を貫通している。図示はしないが、第2吐水孔30Bの内下面も、第2通水路32Bの内下面と、便鉢部18の汚物受け面24とを滑らかに連ねている。垂下壁部34は、第2吐水孔30Bを形成するとともに第2吐水孔30Bより上方に設けられる第2孔形成部36Bを有する。第2孔形成部36Bは第1孔形成部36Aと同様の構成になるため、その説明を省略する。 Although the first water spouting section 28A has been described in detail so far, the second water spouting section 28B also has many points in common. That is, the second water spouting hole 30B of the second water spouting portion 28B also penetrates the hanging wall portion 34. Although not shown, the inner and lower surfaces of the second water discharge hole 30B also smoothly connect the inner and lower surfaces of the second water passage 32B and the waste receiving surface 24 of the toilet bowl portion 18. The hanging wall portion 34 has a second hole forming portion 36B that forms a second water spouting hole 30B and is provided above the second water spouting hole 30B. The second hole forming section 36B has the same configuration as the first hole forming section 36A, so a description thereof will be omitted.

次に、水洗大便器10の他の特徴を説明する。図7は、便器本体12の分解斜視図である。図1、図5、図7に示すように、本実施形態の便器本体12は、上面側部分38A、38Bと、上面側部分38A、38Bより下側の便鉢側部分40とを接合して構成される。上面側部分38A、38Bと便鉢側部分40とは接着等により接合される。上面側部分38A、38Bと便鉢側部分40は、陶器製の便器本体12を得るために必要な便器本体12の半製品であり、鋳込み成形により得られる鋳込み成形品である。本実施形態の便器本体12は、未焼成状態にある鋳込み成形品としての上面側部分38A、38Bと便鉢側部分40を接合した後、それらを焼成することで得られる。 Next, other features of the flush toilet 10 will be explained. FIG. 7 is an exploded perspective view of the toilet main body 12. As shown in FIGS. 1, 5, and 7, the toilet main body 12 of this embodiment has upper surface side portions 38A, 38B and a toilet bowl side portion 40 below the upper surface side portions 38A, 38B joined together. configured. The upper surface side portions 38A, 38B and the toilet bowl side portion 40 are joined by adhesive or the like. The upper surface side parts 38A, 38B and the toilet bowl side part 40 are semi-finished products of the toilet bowl main body 12 necessary to obtain the ceramic toilet bowl main body 12, and are cast molded products obtained by casting molding. The toilet main body 12 of this embodiment is obtained by joining the upper surface side parts 38A, 38B as a cast molded product in an unfired state and the toilet bowl side part 40, and then firing them.

上面側部分38A、38Bと便鉢側部分40は、便器本体12を分割した形状を持つ。上面側部分38A、38Bは、便器本体12の上面部20の少なくとも一部を含む部分である。本実施形態の上面側部分38A、38Bには、第1吐水部28Aに対応する第1上面側部分38Aと、第2吐水部28Bに対応する第2上面側部分38Bとが含まれる。便鉢側部分40は、便器本体12の上面側部分38A、38Bより下側の部分であり、便鉢部18の大部分を含む部分である。以下、第1上面側部分38Aと第2上面側部分38Bは多くの構成が共通するため、その共通する構成に関して第1上面側部分38Aを示す図面を参照しながら説明する。 The upper surface side portions 38A, 38B and the toilet bowl side portion 40 have a shape obtained by dividing the toilet bowl main body 12. The upper surface side portions 38A and 38B are portions that include at least a portion of the upper surface portion 20 of the toilet main body 12. The upper surface side portions 38A and 38B of this embodiment include a first upper surface side portion 38A corresponding to the first water spouting portion 28A and a second upper surface side portion 38B corresponding to the second water spouting portion 28B. The toilet bowl side portion 40 is a portion below the upper surface side portions 38A and 38B of the toilet main body 12, and is a portion that includes most of the toilet bowl portion 18. Hereinafter, since the first upper surface side portion 38A and the second upper surface side portion 38B have many configurations in common, the common configuration will be described with reference to the drawing showing the first upper surface side portion 38A.

図8は、図3のD-D線断面図である。図5、図8に示すように、上面側部分38A、38Bと便鉢側部分40の境界位置は、上面側部分38A、38Bに対応する吐水部28A、28Bを形成する壁部を上下に分割する位置に設定される。図5等では、説明の便宜のため、上面側部分38A、38Bと便鉢側部分40との境界位置を二点鎖線で示すが、これらは外観に現われなくともよい。便鉢側部分40の吐水孔30A、30Bや通水路32A、32Bを形成する箇所は上側に開放した形状となる。上面側部分38A、38Bは、便鉢側部分40の吐水孔30A、30Bや通水路32A、32Bを形成する箇所を上側から塞ぐように配置される。 FIG. 8 is a sectional view taken along the line DD in FIG. 3. As shown in FIGS. 5 and 8, the boundary position between the upper surface side parts 38A, 38B and the toilet bowl side part 40 divides the wall part forming the water spouting parts 28A, 28B corresponding to the upper surface side parts 38A, 38B into upper and lower parts. The position is set to In FIG. 5 and the like, for convenience of explanation, the boundary positions between the upper surface side portions 38A, 38B and the toilet bowl side portion 40 are shown by two-dot chain lines, but these do not need to appear in the external appearance. The portions of the toilet bowl side portion 40 where the water discharge holes 30A, 30B and the water passages 32A, 32B are formed have an upwardly open shape. The upper surface side portions 38A and 38B are arranged so as to close the portions of the toilet bowl side portion 40 where the water discharge holes 30A and 30B and the water passages 32A and 32B are formed from above.

図5、図7、図8に示すように、第1上面側部分38Aは、第1通水路32Aの内上面32bを構成する第1上壁部42Aと、垂下壁部34の第1孔形成部36Aを少なくとも構成する第1垂下側壁部44Aとを有する。第1上壁部42Aは、便器本体12の上面部20の一部を構成する。第1垂下側壁部44Aは、第1吐水孔30Aの内上面30bを構成する。第1垂下側壁部44Aの両側部44aは、第1孔形成部36Aと周方向両側に隣接する垂下壁部34の他部分を構成する。 As shown in FIGS. 5, 7, and 8, the first upper surface side portion 38A includes a first upper wall portion 42A that constitutes the inner upper surface 32b of the first water passage 32A, and a first hole formed in the hanging wall portion 34. It has a first hanging side wall portion 44A that constitutes at least the portion 36A. The first upper wall portion 42A constitutes a part of the upper surface portion 20 of the toilet main body 12. The first hanging side wall portion 44A constitutes the inner upper surface 30b of the first water discharge hole 30A. Both side portions 44a of the first hanging side wall portion 44A constitute other portions of the hanging wall portion 34 adjacent to the first hole forming portion 36A on both sides in the circumferential direction.

便鉢側部分40は、第1通水路32Aの内側面32cを構成する一対の第1側壁部46Aと、第1通水路32Aの内下面32aを構成する第1下壁部48Aとを有する。一対の第1側壁部46Aは、第1吐水孔30Aを形成する入側開口部50を有する。第1下壁部48Aは第1吐水孔30Aの内下面30aも構成する。 The toilet bowl side portion 40 has a pair of first side wall portions 46A that constitute the inner surface 32c of the first water passage 32A, and a first lower wall portion 48A that constitutes the inner lower surface 32a of the first water passage 32A. The pair of first side wall portions 46A have an inlet opening 50 that forms the first water discharge hole 30A. The first lower wall portion 48A also constitutes the inner lower surface 30a of the first water discharge hole 30A.

図9は、図5のE-E線断面の一部を示す図である。図7~図9に示すように、第1側壁部46Aは、第1段部52と、第1段部52の上面52aより低位置に形成される第2段部54とを有する。第2段部54は、第1側壁部46Aの入側開口部50に形成される。第1段部52の上面52aや第2段部54の上面54aは汚物受け面24の外周端部24bより高位置に形成される。第1段部52と第2段部54のそれぞれは、便器本体12の上面部20より低位置に形成される。 FIG. 9 is a diagram showing a part of a cross section taken along the line EE in FIG. As shown in FIGS. 7 to 9, the first side wall portion 46A includes a first step portion 52 and a second step portion 54 formed at a lower position than the upper surface 52a of the first step portion 52. As shown in FIGS. The second step portion 54 is formed at the entrance opening 50 of the first side wall portion 46A. The upper surface 52a of the first step portion 52 and the upper surface 54a of the second step portion 54 are formed at a higher position than the outer peripheral end portion 24b of the dirt receiving surface 24. Each of the first step portion 52 and the second step portion 54 is formed at a lower position than the upper surface portion 20 of the toilet main body 12.

第1段部52の上面52aは、第1上面側部分38Aの第1上壁部42Aの側端部と接触して第1上壁部42Aを支持する。第2段部54の上面54aは、第1上面側部分38Aの第1垂下側壁部44Aの両側部と接触して第1垂下側壁部44Aを支持する。 The upper surface 52a of the first step portion 52 supports the first upper wall portion 42A by contacting the side end portion of the first upper wall portion 42A of the first upper surface side portion 38A. The upper surface 54a of the second step portion 54 supports the first hanging side wall 44A by contacting both sides of the first hanging side wall 44A of the first upper surface side portion 38A.

第2段部54は、第2段部54の上面54aから立ち上がる側面54bを有する。第2段部54は、第1通水路32Aの内側面や垂下壁部34の内周面から水平方向に凹むように形成される。第2段部54の側面54bには、第1垂下側壁部44Aの両側部が接触している。 The second step portion 54 has a side surface 54b rising from the upper surface 54a of the second step portion 54. The second step portion 54 is formed to be recessed in the horizontal direction from the inner surface of the first water passage 32A or the inner circumferential surface of the hanging wall portion 34. Both side portions of the first hanging side wall portion 44A are in contact with the side surface 54b of the second step portion 54.

以上の水洗大便器10の効果を説明する。かりに、便鉢側部分40と接触していない場合、第1上面側部分38Aの第1垂下側壁部44Aは、その第1上壁部42Aからぶら下がった状態となる。よって、第1上面側部分38Aの第1垂下側壁部44Aは、未焼成状態にあるときに自重により下向きの力成分が付与され、下向きに伸びる恐れがある。 The effects of the flush toilet 10 described above will be explained. On the other hand, when not in contact with the toilet bowl side portion 40, the first hanging side wall portion 44A of the first upper surface side portion 38A is in a state of hanging from its first upper wall portion 42A. Therefore, when the first hanging side wall portion 44A of the first upper surface side portion 38A is in an unfired state, a downward force component is applied due to its own weight, and there is a possibility that the first hanging side wall portion 44A may extend downward.

この点、本実施形態によれば、便鉢側部分40は、第1上面側部分38Aの第1垂下側壁部44Aと接触して第1垂下側壁部44Aを支持している。よって、第1上面側部分38Aの第1垂下側壁部44Aに付与される自重による下向きの力成分を便鉢側部分40に伝達できる。この結果、未焼成状態にあるとき、第1上面側部分38Aの第1垂下側壁部44Aに作用する下向きの力成分を低減でき、その第1垂下側壁部44Aが伸びてしまう事態を避けられる。これに伴い、第1上面側部分38Aの第1垂下側壁部44Aにより目的とする形状の第1吐水孔30Aを精度よく得やすくなる。 In this regard, according to the present embodiment, the toilet bowl side portion 40 is in contact with the first hanging side wall 44A of the first upper surface side portion 38A and supports the first hanging side wall 44A. Therefore, the downward force component due to its own weight applied to the first hanging side wall portion 44A of the first upper surface side portion 38A can be transmitted to the toilet bowl side portion 40. As a result, when in the unfired state, the downward force component acting on the first hanging side wall 44A of the first upper surface side portion 38A can be reduced, and a situation where the first hanging side wall 44A is stretched can be avoided. Accordingly, it becomes easier to accurately obtain the first water discharge hole 30A having the desired shape by the first hanging side wall portion 44A of the first upper surface side portion 38A.

また、第1上面側部分38Aの第1垂下側壁部44Aは、第2段部54の側面54bと接触している。よって、便鉢側部分40に第1上面側部分38Aを接合する際、第1上面側部分38Aの第1垂下側壁部44Aと第2段部54の側面54bとの接触によって、便鉢側部分40に対する水平方向での第1上面側部分38Aの相対移動を規制できる。これに伴い、便鉢側部分40に対する第1上面側部分38Aの位置決め作業が容易になる。 Further, the first hanging side wall portion 44A of the first upper surface side portion 38A is in contact with the side surface 54b of the second step portion 54. Therefore, when joining the first upper surface side portion 38A to the toilet bowl side portion 40, the toilet bowl side portion Relative movement of the first upper surface side portion 38A in the horizontal direction with respect to the first upper surface side portion 40 can be restricted. Accordingly, the positioning work of the first upper surface side portion 38A with respect to the toilet bowl side portion 40 becomes easier.

なお、この他にも、第1上面側部分38Aの第1上壁部42Aと第1段部52の側面52b(図7、図8参照)との接触によっても、便鉢側部分40に対する水平方向での第1上面側部分38Aの相対移動を規制できる。 In addition to this, the contact between the first upper wall portion 42A of the first upper surface side portion 38A and the side surface 52b of the first step portion 52 (see FIGS. 7 and 8) may also cause the leveling of the toilet bowl side portion 40. The relative movement of the first upper surface side portion 38A in the direction can be restricted.

便器本体12を製造する方法として、鋳込み成形により得られる単数の鋳込み成形品により便器本体12を構成し、その鋳込み成形品の一部を切除して吐水孔30A、30Bを形成する手法がある。このような手法を採る場合、鋳込み成形品の一部の切除に伴いバリが発生してしまい、目的とする形状の吐水孔30A、30Bを精度よく形成できないという問題がある。 As a method of manufacturing the toilet bowl main body 12, there is a method in which the toilet bowl main body 12 is constructed from a single cast molded product obtained by casting molding, and a part of the cast molded product is cut out to form the water spout holes 30A and 30B. When such a method is adopted, there is a problem that burrs are generated due to the removal of a part of the cast molded product, and the water discharge holes 30A and 30B of the desired shape cannot be formed with high precision.

この点、本実施形態のように、上面側部分38A、38Bと便鉢側部分40により便器本体12を構成する場合、上面側部分38A、38Bと便鉢側部分40により吐水孔30A、30Bを形成できる。よって、鋳込み成形品の一部の切除を伴い吐水孔30A、30Bを形成する手法と比べ、目的とする形状の吐水孔30A、30Bを精度よく形成できる利点がある。また、この他にも、単数の鋳込み成形品により便器本体12を構成する場合と比べ、便器本体12の通水路32A、32Bの高さを容易に小さくできる。これに伴い、吐水孔30A、30Bから洗浄水を吐き出すために通水路32A、32B内に供給すべき水量を低減できる利点もある。 In this regard, when the toilet main body 12 is configured by the upper surface side parts 38A, 38B and the toilet bowl side part 40 as in this embodiment, the water spout holes 30A, 30B are formed by the upper surface side parts 38A, 38B and the toilet bowl side part 40. Can be formed. Therefore, compared to a method of forming the water spouting holes 30A, 30B by removing a part of the cast molded product, there is an advantage that the water spouting holes 30A, 30B having the desired shape can be formed with high accuracy. Moreover, in addition to this, the height of the water passages 32A, 32B of the toilet bowl body 12 can be easily reduced compared to the case where the toilet bowl body 12 is constructed from a single cast molded product. Along with this, there is also an advantage that the amount of water to be supplied into the water passages 32A, 32B in order to discharge the cleaning water from the water discharge holes 30A, 30B can be reduced.

ここまで第1上面側部分38Aに関する構成の詳細を説明したが、第2上面側部分38Bでも多くの点で共通する。つまり、第2上面側部分38Bは、第2通水路32Bの内上面を構成する第2上壁部42Bと、垂下壁部34の第2孔形成部36Bを少なくとも構成する第2垂下側壁部44Bと、を有する。 Although the details of the configuration regarding the first upper surface side portion 38A have been described so far, many points are common to the second upper surface side portion 38B. That is, the second upper surface side portion 38B includes a second upper wall portion 42B that constitutes the inner upper surface of the second water passage 32B, and a second hanging side wall portion 44B that constitutes at least the second hole forming portion 36B of the hanging wall portion 34. and has.

便鉢側部分40は、第2通水路32Bの内側面32cを構成する一対の第2側壁部46Bと、第2通水路32Bの内下面32aを構成する第2下壁部48Bとを有する。第2側壁部46Bも、第1側壁部46Aと同様、第1段部52と第2段部54を有する。第1段部52の上面は、図示しないが、第2上面側部分38Bの第2垂下側壁部44Bと接触して第2垂下側壁部44Bを支持する。第2段部54の上面は、図示しないが、第2上面側部分38Bの第2垂下側壁部44Bと接触して第2垂下側壁部44Bを支持する。 The toilet bowl side portion 40 has a pair of second side wall portions 46B that constitute the inner surface 32c of the second water passage 32B, and a second lower wall portion 48B that constitutes the inner lower surface 32a of the second water passage 32B. The second side wall portion 46B also has a first step portion 52 and a second step portion 54, like the first side wall portion 46A. Although not shown, the upper surface of the first step portion 52 contacts the second hanging side wall portion 44B of the second upper surface side portion 38B to support the second hanging side wall portion 44B. Although not shown, the upper surface of the second step portion 54 contacts the second hanging side wall portion 44B of the second upper surface side portion 38B to support the second hanging side wall portion 44B.

次に水洗大便器10の第2の工夫点を説明する。図2、図3を参照する。便器本体12は、便鉢部18の他に、便鉢部18の底部に接続される便器排水路56を備える。便器排水路56は、便鉢部18内から下水側水路(不図示)に排出される汚物や水の通り道となる。 Next, the second point of improvement of the flush toilet 10 will be explained. Refer to FIGS. 2 and 3. In addition to the toilet bowl portion 18, the toilet bowl main body 12 includes a toilet drainage channel 56 connected to the bottom of the toilet bowl portion 18. The toilet bowl drainage channel 56 serves as a path for filth and water to be discharged from the inside of the toilet bowl portion 18 to a sewer side waterway (not shown).

溜水部26は、便鉢部18の底部を形成するとともに有底状をなす。溜水部26は、底壁面26aと、底壁面26aから立ち上がる複数の立壁面26b~26dと、を有する。底壁面26aの後部には便器排水路56の入口56aが開口する。溜水部26には溜水が溜められる。 The water storage portion 26 forms the bottom of the toilet bowl portion 18 and has a bottomed shape. The water storage section 26 has a bottom wall surface 26a and a plurality of vertical wall surfaces 26b to 26d rising from the bottom wall surface 26a. An inlet 56a of a toilet drain channel 56 opens at the rear of the bottom wall surface 26a. Water is stored in the water storage section 26.

立壁面26b~26dには、溜水部26の左右一方側となる左側(図2の紙面では右側)に設けられる左側立壁面26b(第1立壁面)と、溜水部26の左右他方側となる右側(図2の紙面では左側)に設けられる右側立壁面26c(第2立壁部)とが含まれる。また、立壁面26b~26dには、溜水部26の後側に設けられる後側立壁面26dが含まれる。左側立壁面26bと右側立壁面26cは、後述する誘導流Fwf(図15参照)を形成するため、前方に向かうにつれて先細りする形状であり、その前端部が第1凹曲面26eを介して滑らかに連なっている。本実施形態の左側立壁面26bは、第2凹曲面26fを介して後側立壁面26dに滑らかに連なっている。本実施形態の右側立壁面26cは、第3凹曲面26gを介して後側立壁面26dに滑らかに連なっている。 The vertical wall surfaces 26b to 26d include a left vertical wall surface 26b (first vertical wall surface) provided on the left side (right side in the paper of FIG. 2), which is one left and right side of the water reservoir section 26, and a left vertical wall surface 26b (first vertical wall surface) provided on the left side (right side in the paper of FIG. and a right standing wall surface 26c (second standing wall portion) provided on the right side (left side in the paper of FIG. 2). Further, the standing wall surfaces 26b to 26d include a rear standing wall surface 26d provided on the rear side of the water storage section 26. The left vertical wall surface 26b and the right vertical wall surface 26c have shapes that taper toward the front in order to form a guided flow Fwf (see FIG. 15), which will be described later, and their front ends smoothly pass through the first concave curved surface 26e. They are connected. The left vertical wall surface 26b of this embodiment is smoothly connected to the rear vertical wall surface 26d via the second concave curved surface 26f. The right standing wall surface 26c of this embodiment is smoothly connected to the rear standing wall surface 26d via the third concave curved surface 26g.

図10は、便器本体12の他の平面図である。汚物受け面24は、平面視において、溜水部26と前後方向Xに重なり溜水部26より後方に設けられる後側領域60と、溜水部26及び後側領域60と左右方向Yに重なる一対の横側領域62A、62Bとを有する。また、汚物受け面24は、平面視において、溜水部26や横側領域62A、62Bと前後方向Xに重なり溜水部26より前方に設けられる前側領域64を有する。 FIG. 10 is another plan view of the toilet main body 12. In plan view, the dirt receiving surface 24 overlaps with the water reservoir 26 in the front-rear direction It has a pair of lateral regions 62A and 62B. Further, the dirt receiving surface 24 has a front region 64 that overlaps the water reservoir 26 and the lateral regions 62A, 62B in the front-rear direction X and is provided in front of the water reservoir 26 in plan view.

図11は、便器本体12の更に他の平面図である。便鉢部18は、吐水孔30A、30Bから吐き出された洗浄水を便鉢部18の内周面に沿って旋回させるように導くための棚面66を有する。本実施形態の棚面66は、第1吐水孔30Aの内下面に連なるように形成され、かつ、第2吐水孔30Bの内下面に連なるように形成される。 FIG. 11 is yet another plan view of the toilet bowl main body 12. The toilet bowl section 18 has a shelf surface 66 for guiding the wash water discharged from the water spouting holes 30A and 30B so as to swirl along the inner peripheral surface of the toilet bowl section 18. The shelf surface 66 of this embodiment is formed so as to be continuous with the inner and lower surfaces of the first water discharging hole 30A, and is also formed so as to be continuous with the inner and lower surface of the second water discharging hole 30B.

図12は、図3の一部の拡大図である。図13は、図2のB-B線端面の一部を主に示す図である。図11~図13に示すように、棚面66は、汚物受け面24の外周端部24bから径方向内側に向かう範囲の一部が構成している。棚面66は、便鉢部18の径方向に沿った切断面での形状が平坦面である。図12、図13では、このような径方向に沿った切断面の形状を示す。 FIG. 12 is an enlarged view of a portion of FIG. 3. FIG. 13 is a diagram mainly showing a part of the end surface taken along line BB in FIG. As shown in FIGS. 11 to 13, the shelf surface 66 constitutes a part of the range extending radially inward from the outer circumferential end 24b of the dirt receiving surface 24. As shown in FIGS. The shelf surface 66 has a flat shape when cut along the radial direction of the toilet bowl portion 18 . 12 and 13 show the shape of such a cut surface along the radial direction.

棚面66は、汚物受け面24の後側領域60から横側領域62A、62Bにかけて連続するように形成される。本実施形態の棚面66は、汚物受け面24の後側領域60から一対の横側領域62A、62Bのそれぞれにかけて連続するように形成される。本実施形態の棚面66は、汚物受け面24の横側領域62A、62Bから前側領域64にはみ出るように形成される。本実施形態の棚面66は、汚物受け面24の後側領域60にて左右方向Xの全範囲に亘り形成される。 The shelf surface 66 is formed so as to be continuous from the rear region 60 of the dirt receiving surface 24 to the lateral regions 62A and 62B. The shelf surface 66 of this embodiment is formed so as to be continuous from the rear region 60 of the dirt receiving surface 24 to each of the pair of lateral regions 62A, 62B. The shelf surface 66 of this embodiment is formed so as to protrude from the lateral regions 62A, 62B of the dirt receiving surface 24 into the front region 64. The shelf surface 66 of this embodiment is formed over the entire range in the left-right direction X in the rear region 60 of the dirt receiving surface 24.

本実施形態の棚面66は、平面視において、溜水部26と前後方向Xに重なる位置で溜水部26の前方には形成されない。汚物受け面24の前側領域64には、溜水部26と前後方向Xに重なる位置で溜水部26の前方にて、下方に窪むような凹曲面部68が設けられる。これにより、汚物受け面24は、後述するが、汚物受け面24から溜水部26に前方から流入する水流として第1分流Fwb(図15参照)を形成するように構成される。 The shelf surface 66 of this embodiment is not formed in front of the water reservoir 26 at a position overlapping the water reservoir 26 in the front-rear direction X when viewed from above. In the front region 64 of the dirt receiving surface 24, a concave curved surface portion 68 recessed downward is provided in front of the water storage portion 26 at a position overlapping the water storage portion 26 in the front-rear direction X. As a result, the filth receiving surface 24 is configured to form a first branch flow Fwb (see FIG. 15) as a water flow flowing from the front into the water reservoir 26 from the filth receiving surface 24, as will be described later.

便鉢部18は、棚面66と溜水部26の立壁面26b~26dを連結する連結面70を有する。連結面70は、便鉢部18の径方向に沿った切断面において、棚面66の内周端66aに連なる単数の曲率半径を持つ凸曲面状の部分である。棚面66に連なる連結面70は、汚物受け面24の後側領域60に少なくとも設けられる。本実施形態の連結面70は、汚物受け面24の後側領域60から横側領域62A、62Bに連続するように設けられる。連結面70は、汚物受け面24の横側領域62A、62Bにも設けられることになる。本実施形態の連結面70は、汚物受け面24の後側領域60にて左右方向Yの全範囲に亘り形成される。 The toilet bowl section 18 has a connecting surface 70 that connects the shelf surface 66 and the vertical wall surfaces 26b to 26d of the water storage section 26. The connecting surface 70 is a convex curved portion having a single radius of curvature that is continuous with the inner circumferential end 66a of the shelf surface 66 in a cut surface along the radial direction of the toilet bowl portion 18. A connecting surface 70 connected to the shelf surface 66 is provided at least in the rear region 60 of the dirt receiving surface 24. The connecting surface 70 of this embodiment is provided so as to be continuous from the rear region 60 of the dirt receiving surface 24 to the lateral regions 62A and 62B. The connecting surface 70 will also be provided in the lateral regions 62A, 62B of the dirt receiving surface 24. The connecting surface 70 of this embodiment is formed over the entire range in the left-right direction Y in the rear region 60 of the dirt-receiving surface 24 .

以上の水洗大便器10による洗浄方法を説明する。本実施形態の水洗大便器10は、水の落差を用いて汚物を押し流す洗い流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通水路32A、32Bに供給する供給動作を行う。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対する操作を通じて洗浄水供給装置14が洗浄開始指令を受けることである。 A cleaning method using the flush toilet 10 described above will be explained. The flush toilet 10 of this embodiment discharges waste by a flushing type cleaning method in which waste is washed away using the head of water. When a predetermined cleaning start condition is satisfied, the wash water supply device 14 performs a supply operation of supplying a predetermined amount of wash water to the water passages 32A and 32B. The cleaning start condition is, for example, that the cleaning water supply device 14 receives a cleaning start command through an operation on an operating member such as a lever or an electric device such as a remote controller or a smartphone.

図14は、第1段階での洗浄水の流れ方を示す図である。ここでの第1段階とは、便鉢部18内に洗浄水が流れ始めた段階をいう。本図では、洗浄水の流れ方向に矢印を付して示す。 FIG. 14 is a diagram showing how the cleaning water flows in the first stage. The first stage here refers to the stage in which flushing water begins to flow into the toilet bowl portion 18. In this figure, the flow direction of the washing water is indicated by an arrow.

洗浄水は、洗浄水供給装置14から通水路32A、32Bを通して各吐水孔30A、30Bに供給され、各吐水孔30A、30Bから吐き出される。第1吐水部28Aは、第1吐水孔30Aから吐き出された洗浄水によって、便鉢部18の右側方部分18cにて汚物受け面24を前方に向かい、汚物受け面24の前端部24aを経由して、便鉢部18の左側方部分18bにて汚物受け面24を後方に向かう第1旋回流Fwaを形成する。第1旋回流Fwaは、汚物受け面24の右側の横側領域62Bや左側の横側領域62Aを伝うときに、それらの棚面66を通るように形成される。第1旋回流Fwa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のことをいう。 The cleaning water is supplied from the cleaning water supply device 14 to each of the water spouting holes 30A, 30B through the water passages 32A, 32B, and is discharged from each of the water spouting holes 30A, 30B. The first water discharging section 28A uses the washing water discharged from the first water discharging hole 30A to move forward on the dirt receiving surface 24 at the right side portion 18c of the toilet bowl section 18, and passing through the front end 24a of the waste receiving surface 24. As a result, a first swirling flow Fwa is formed in the left side portion 18b of the toilet bowl portion 18 toward the rear of the waste receiving surface 24. The first swirling flow Fwa is formed so as to pass through the shelf surfaces 66 of the right lateral region 62B and the left lateral region 62A of the dirt receiving surface 24 when passing through them. The first swirl flow Fwa is formed as a main flow. In this specification, the term "main stream" refers to a streak-like flow in which a portion of the wash water flows in a state in which a portion of the wash water is partially collected.

第1旋回流Fwaを形成する洗浄水の一部は、便鉢部18の左側方部分18bにて汚物受け面24の前部で第1分流Fwbに分かれる。第1分流Fwbは、汚物受け面24から溜水部26側に向けて流れ落ちる主流として形成される。 A part of the wash water forming the first swirling flow Fwa is separated into a first branch flow Fwb at the front part of the waste receiving surface 24 at the left side portion 18b of the toilet bowl portion 18. The first branch flow Fwb is formed as a main flow flowing down from the dirt receiving surface 24 toward the water storage section 26 side.

便鉢部18の左側方部分18bにて第1分流Fwbに分かれずに汚物受け面24を後方に向かう第1旋回流Fwaの一部Fwcは、第1分流Fwbより流量が多くなる。 A portion Fwc of the first swirling flow Fwa that does not separate into the first branch flow Fwb at the left side portion 18b of the toilet bowl portion 18 and heads rearward on the waste receiving surface 24 has a flow rate larger than that of the first branch flow Fwb.

第2吐水部28Bは、第2吐水孔30Bから広角な範囲に洗浄水を吐き出すことによって、溜水部26に後方から流入する第1水流Fwdと、第1水流Fwdより後方にて汚物受け面24を反時計回り方向に伝う第2水流Fweとを形成する。第1水流Fwdと第2水流Fweは主流として形成される。第1水流Fwdは、第2水流Fweより流量が多くなる。第1水流Fwdは、第1旋回流Fwaの一部Fwcと合流していないとき、主に、便鉢部18の左側方部分18bにて溜水部26に後方から流入する。このとき、第1水流Fwdは、便鉢部18の右側方部分18cにおいて溜水部26の後方から流入する流量より、便鉢部18の左側方部分18bにおいて溜水部26の後方から流入する流量が多くなるように形成される。このとき、便鉢部18の右側方部分18cにおいて溜水部26の後方から流入する第1水流Fwdの流量は零でもよい。 The second water spouting section 28B discharges cleaning water in a wide angle range from the second water spouting hole 30B, thereby allowing the first water flow Fwd to flow into the water reservoir section 26 from the rear and the dirt receiving surface at the rear of the first water flow Fwd. 24 in a counterclockwise direction. The first water flow Fwd and the second water flow Fwe are formed as a main stream. The first water flow Fwd has a larger flow rate than the second water flow Fwe. The first water flow Fwd, when not merging with the part Fwc of the first swirling flow Fwa, mainly flows into the water storage section 26 from the rear at the left side portion 18b of the toilet bowl section 18. At this time, the first water flow Fwd flows from the rear of the water storage section 26 at the left side portion 18b of the toilet bowl section 18, rather than from the rear of the water storage section 26 at the right side section 18c of the toilet bowl section 18. It is formed to increase the flow rate. At this time, the flow rate of the first water flow Fwd flowing from the rear of the water storage section 26 into the right side portion 18c of the toilet bowl section 18 may be zero.

図15は、第2段階での洗浄水の流れ方を示す図である。ここでの第2段階とは、第1段階より時間が経過した後の段階をいう。第1旋回流Fwa、第1分流Fwbの流れ方は第1段階と同様である。 FIG. 15 is a diagram showing how the cleaning water flows in the second stage. The second stage here refers to a stage after a period of time has elapsed from the first stage. The flow of the first swirling flow Fwa and the first branch flow Fwb is the same as in the first stage.

第2段階では、第2吐水孔30Bから吐き出される洗浄水が形成する第1水流Fwdや第2水流Fweは、第1旋回流Fwaの一部Fwcと合流する。これにより、これら第1水流Fwdや第2水流Fweは、第1旋回流Fwaの一部Fwcとの合流前に流れていた位置よりも、汚物受け面24の後側領域60で汚物受け面24の外周端部24b寄りの箇所を通るように形成される。 In the second stage, the first water flow Fwd and the second water flow Fwe formed by the wash water discharged from the second water discharge hole 30B merge with a portion Fwc of the first swirl flow Fwa. As a result, the first water flow Fwd and the second water flow Fwe reach the waste receiving surface 24 in the rear region 60 of the waste receiving surface 24 from the position where they were flowing before merging with the part Fwc of the first swirling flow Fwa. It is formed so as to pass through a location near the outer peripheral end portion 24b.

このとき、第1水流Fwdや第2水流Fweのいずれもが、汚物受け面24の後側領域60を反時計回り方向に向けて伝うように形成される。第1吐水部28Aや第2吐水部28Bは、第1吐水孔30Aや第2吐水孔30Bから洗浄水を吐き出すことによって、汚物受け面24の後側領域60を反時計回り方向に伝う第1水流Fwdを形成しているといえる。この第1水流Fwdは、汚物受け面24の後側領域60で棚面66や連結面70を反時計回り方向に伝うように形成される。 At this time, both the first water flow Fwd and the second water flow Fwe are formed so as to travel in the counterclockwise direction through the rear region 60 of the dirt receiving surface 24. The first water spouting part 28A and the second water spouting part 28B discharge the cleaning water from the first water spouting hole 30A and the second water spouting hole 30B, so that the first water flowing through the rear region 60 of the dirt receiving surface 24 in the counterclockwise direction. It can be said that the water flow Fwd is formed. This first water flow Fwd is formed so as to run counterclockwise on the shelf surface 66 and the connecting surface 70 in the rear region 60 of the dirt receiving surface 24 .

第1水流Fwdは、第1旋回流Fwaの一部Fwcと合流しているとき、主に、溜水部26の右側立壁面26cに接触しつつ落ち込むように便鉢部18の右側方部分18cにて溜水部26内に後方に流入する。このとき、第1水流Fwdは、便鉢部18の左側方部分18cにおいて溜水部26内に後方から流入する流量より、便鉢部18の右側方部分18bにおいて溜水部26内に後方から流入する流量が多くなるように形成される。このとき、便鉢部18の左側方部分18bにおいて溜水部26の後方から流入する第1水流Fwdの流量は零でもよい。この第1水流Fwdは、汚物受け面24から溜水部26内に流入する水流のなかで最も流量が多い主流となる。 When the first water flow Fwd merges with a part Fwc of the first swirling flow Fwa, the first water flow Fwd mainly falls into the right side portion 18c of the toilet bowl portion 18 while contacting the right vertical wall surface 26c of the water storage portion 26. The water flows rearward into the water reservoir 26 at the point. At this time, the first water flow Fwd flows from the rear into the water reservoir 26 at the right side 18b of the toilet bowl 18 than the flow rate flowing into the water reservoir 26 from the rear at the left side 18c of the toilet bowl 18. It is formed so that the inflow flow rate is large. At this time, the flow rate of the first water flow Fwd flowing from the rear of the water storage section 26 in the left side portion 18b of the toilet bowl section 18 may be zero. This first water flow Fwd becomes the main stream with the largest flow rate among the water flows flowing into the water storage section 26 from the waste receiving surface 24.

図16は、第2段階での洗浄水の流れ方を示す他の図である。図15、図16に示すように、溜水部26内に後方から流入する第1水流Fwdは、溜水部26の右側立壁面26cに接触しつつ下向きに流れる。この第1水流Fwdは、溜水部26の底壁面26aや左側立壁面26bに衝突することで上方かつ後方に向きを変えた後、溜水部26内で上昇したうえで自重により下降する縦旋回流となる誘導流Fwfを形成する。この誘導流Fwfは、溜水部26内で後方に向けて上昇してから下降することで、便器排水路56の入口56aに汚物を押し込むような流れとなる。このように溜水部26は、右側立壁面26cに接触しつつ溜水部26内に後方から流入する流れによって、便器排水路56に汚物を押し込む誘導流Fwfを形成するように構成されている。 FIG. 16 is another diagram showing how the washing water flows in the second stage. As shown in FIGS. 15 and 16, the first water flow Fwd flowing into the water storage section 26 from the rear flows downward while contacting the right vertical wall surface 26c of the water storage section 26. This first water flow Fwd changes its direction upward and backward by colliding with the bottom wall surface 26a and the left vertical wall surface 26b of the water storage section 26, rises within the water storage section 26, and then descends due to its own weight. A guided flow Fwf that becomes a swirling flow is formed. This induced flow Fwf rises rearward within the water reservoir 26 and then descends, thereby forming a flow that pushes waste into the entrance 56a of the toilet drainage channel 56. In this way, the water reservoir section 26 is configured to form a guided flow Fwf that pushes waste into the toilet drainage channel 56 by the flow flowing into the water reservoir section 26 from the rear while contacting the right vertical wall surface 26c. .

なお、このような誘導流Fwfには、前述した溜水部26内に前方から流入する第1分流Fwbが合流する。これにより、誘導流Fwfの水勢が増幅される。 Note that the first branch flow Fwb that flows into the water reservoir portion 26 from the front mentioned above joins the induced flow Fwf. Thereby, the water force of the induced flow Fwf is amplified.

第2水流Fweは、汚物受け面24の後側領域60を反時計回り方向に伝うとともに、汚物受け面24の右側の横側領域62Bを前方に向けて伝う。第2水流Fweは、汚物受け面24の右側の横側領域62Bで第1旋回流Fwaと合流し、その第1旋回流Fwaの水勢を増幅させる。 The second water flow Fwe travels counterclockwise through the rear region 60 of the dirt receiving surface 24 and forwards through the right side region 62B of the dirt receiving surface 24. The second water flow Fwe joins the first swirling flow Fwa in the right side region 62B of the dirt receiving surface 24, and amplifies the water force of the first swirling flow Fwa.

このように第1水流Fwdは、第1旋回流Fwaの一部Fwcと合流してから、溜水部26の右側立壁面26cに接触しつつ溜水部26内に後方から流入するように形成される。これにより、第1旋回流Fwaの一部Fwcと合流させない場合よりも、溜水部26の後方から流入する第1水流Fwdの流量を増大でき、汚物排出能力の向上を図れる。 In this way, the first water flow Fwd is formed to flow into the water storage section 26 from the rear while contacting the right vertical wall surface 26c of the water storage section 26 after merging with a portion Fwc of the first swirling flow Fwa. be done. Thereby, the flow rate of the first water flow Fwd flowing from the rear of the water storage section 26 can be increased compared to the case where the first swirling flow Fwa is not merged with a portion Fwc, and the filth discharge ability can be improved.

特に、第1水流Fwdは、第1旋回流Fwaの一部Fwcと合流しないときも、溜水部26に後方から流入するように形成される。よって、第1水流Fwdに対して第1旋回流Fwaが合流したとき、その第1旋回流Fwaの流れ方向が溜水部26を向くように、その流れ方向を変え易くなる。これに伴い、溜水部26に後方から流入せずに汚物受け面24の後側領域60を伝う水流の第1旋回流Fwaの全流量に対する割合を減少させ、その分、溜水部26に後方から流入する水流の第1旋回流Fwaの全流量に対する割合を増大できる。この結果、溜水部26の後方から流入する第1水流Fwdの流量をより増大でき、汚物排出能力の更なる向上を図れる。 In particular, the first water flow Fwd is formed so as to flow into the water storage portion 26 from the rear even when it does not merge with a portion Fwc of the first swirling flow Fwa. Therefore, when the first swirling flow Fwa merges with the first water flow Fwd, the flow direction of the first swirling flow Fwa can be easily changed so that it faces toward the water storage section 26. Along with this, the proportion of the first swirling flow Fwa of the water flow that does not flow into the water storage section 26 from behind but flows along the rear region 60 of the waste receiving surface 24 to the total flow rate is reduced, and the water flow in the water storage section 26 is reduced by that amount. The ratio of the first swirling flow Fwa of the water flow flowing in from the rear to the total flow rate can be increased. As a result, the flow rate of the first water flow Fwd flowing from the rear of the water storage section 26 can be further increased, and the filth discharge capability can be further improved.

ここで、本実施形態の水洗大便器10では、このような溜水部26に後方から流入する第1水流Fwdの流量を増大させるため、次の工夫をしている。図17は、棚面66の径方向での勾配を示すグラフである。ここでの「径方向での勾配」とは、便鉢部18の径方向に沿った切断面での棚面66の勾配(以下、単に勾配ともいう)を意味する。図17の位置A~Cは、図11の位置A~Cに対応する。 Here, in the flush toilet 10 of the present embodiment, in order to increase the flow rate of the first water flow Fwd flowing into the water storage section 26 from the rear, the following measures are taken. FIG. 17 is a graph showing the slope of the shelf surface 66 in the radial direction. The term "gradient in the radial direction" as used herein means the gradient of the shelf surface 66 (hereinafter also simply referred to as gradient) at the cut surface of the toilet bowl portion 18 along the radial direction. Positions A to C in FIG. 17 correspond to positions A to C in FIG.

図11~図13、図17に示すように、前述の後側領域60での棚面66の勾配は、横側領域62A、62Bでの棚面66の勾配より大きくなるように設定される。本実施形態の棚面66の勾配は、平面視において、便鉢部18の左右中心線Lcと重なる位置Aで最も大きくなるように設定される。棚面66の勾配は、左右中心線Lcと重なる位置Aから周方向に離れるにつれて、連続的に小さくなるように設定される。横側領域62A、62Bでの棚面66の勾配は、後側領域60から周方向に離れるにつれて、連続的に小さくなるように設定されるとも捉えられる。 As shown in FIGS. 11 to 13 and 17, the slope of the shelf surface 66 in the rear region 60 described above is set to be larger than the slope of the shelf surface 66 in the lateral regions 62A, 62B. The slope of the shelf surface 66 in this embodiment is set to be greatest at a position A overlapping with the left-right center line Lc of the toilet bowl portion 18 in plan view. The slope of the shelf surface 66 is set to continuously decrease as it moves away from the position A overlapping the left-right center line Lc in the circumferential direction. It can also be considered that the slope of the shelf surface 66 in the lateral regions 62A, 62B is set to become continuously smaller as it moves away from the rear region 60 in the circumferential direction.

これにより、後側領域60での棚面66の勾配を横側領域62A、62Bでの棚面66の勾配以下にする場合と比べ、後側領域60の棚面66を反時計回り方向に伝う洗浄水の一部を適度に溜水部26に流し落とし易くなる。よって、溜水部26の後方からの洗浄水の流入量を増大でき、汚物排出能力の向上を図れる。 As a result, compared to the case where the slope of the shelf surface 66 in the rear region 60 is made equal to or less than the slope of the shelf surface 66 in the side regions 62A and 62B, the slope of the shelf surface 66 in the rear region 60 is transmitted in a counterclockwise direction. A portion of the washing water can be appropriately poured into the water reservoir 26 with ease. Therefore, the amount of washing water flowing in from the rear of the water storage section 26 can be increased, and the dirt discharge ability can be improved.

また、後側領域60の棚面66により洗浄水を便鉢部18の内周面に沿って導けるため、後側領域60に対して反時計回り方向に連なる右側の横側領域62Bの汚物受け面24にも適度な量の洗浄水を伝わせられる。よって、溜水部26への後方からの洗浄水の流入量を増大しつつ、右側の横側領域62Bでの汚物受け面24の洗浄能力の向上も図れる。 In addition, since the flushing water can be guided along the inner circumferential surface of the toilet bowl part 18 by the shelf surface 66 of the rear region 60, the filth receptacle in the right side region 62B extending counterclockwise with respect to the rear region 60 An appropriate amount of cleaning water can also be transmitted to the surface 24. Therefore, while increasing the amount of washing water flowing from the rear into the water storage section 26, it is possible to improve the washing ability of the dirt receiving surface 24 in the right side region 62B.

図18は、連結面70の径方向での曲率半径を示すグラフである。ここでの「径方向での曲率半径」とは、便鉢部18の径方向に沿った切断面での曲率半径(以下、単に曲率半径ともいう)を意味する。図18の位置A~Eは、図11の位置A~Eに対応する。 FIG. 18 is a graph showing the radius of curvature of the connecting surface 70 in the radial direction. The "radius of curvature in the radial direction" herein means the radius of curvature (hereinafter also simply referred to as radius of curvature) at a cut surface of the toilet bowl portion 18 along the radial direction. Positions A to E in FIG. 18 correspond to positions A to E in FIG.

図11~図13、図18に示すように、前述の後側領域60での連結面70の曲率半径は、横側領域62A、62Bでの連結面70の曲率半径より大きくなるように設定される。本実施形態の連結面70の曲率半径は、平面視において、溜水部26の後方にて便鉢部18の左右中心線Lcと重なる位置Aで最も大きくなるように設定される。連結面70の曲率半径は、左右中心線Lcと重なる位置Aから周方向に離れるにつれて、連続的に小さくなるように設定される。横側領域62A、62Bでの連結面70の曲率半径は、後側領域60から周方向に離れるにつれて、連続的に小さくなるように設定されるとも捉えられる。 As shown in FIGS. 11 to 13 and 18, the radius of curvature of the connecting surface 70 in the rear region 60 is set to be larger than the radius of curvature of the connecting surface 70 in the lateral regions 62A, 62B. Ru. The radius of curvature of the connecting surface 70 of this embodiment is set to be largest at a position A that overlaps with the left-right center line Lc of the toilet bowl section 18 behind the water storage section 26 in plan view. The radius of curvature of the connecting surface 70 is set to continuously decrease as it moves away from the position A overlapping the left-right center line Lc in the circumferential direction. It can also be considered that the radius of curvature of the connecting surface 70 in the lateral regions 62A, 62B is set to become continuously smaller as it moves away from the rear region 60 in the circumferential direction.

これにより、後側領域60での連結面70の曲率半径を横側領域62A、62Bでの連結面70の曲率半径以下にする場合と比べ、凸曲面状の連結面70が形成されている径方向での範囲を広くできる。これに伴い、後側領域60で連結面70上を通る洗浄水の量を増やすことができ、連結面70から溜水部26に流し落とせる洗浄水の量を増やし易くなる。この結果、溜水部26への後方からの洗浄水の流入量をさらに増大でき、汚物排出能力の向上を図れる。 As a result, compared to the case where the radius of curvature of the connecting surface 70 in the rear region 60 is made equal to or less than the radius of curvature of the connecting surface 70 in the lateral regions 62A, 62B, the radius on which the convexly curved connecting surface 70 is formed is increased. You can widen the range in direction. Accordingly, it is possible to increase the amount of cleaning water that passes over the connecting surface 70 in the rear region 60, and it becomes easier to increase the amount of cleaning water that can flow down from the connecting surface 70 to the water reservoir 26. As a result, the amount of washing water flowing into the water storage section 26 from the rear can be further increased, and the dirt discharge capability can be improved.

かりに、溜水部26への後方からの洗浄水の流入量を増大させるうえで、汚物受け面24の後側領域60の広範囲に凹曲面を設け、その凹曲面により溜水部26に洗浄水を誘導する方策が考えられる。この点、本実施形態によれば、汚物受け面24の後側領域60には、平坦面である棚面66と凸曲面状の連結面70が設けられ、少なくとも棚面66の勾配により溜水部26への後方からの洗浄水の流入量を増大できる。よって、溜水部26への後方からの洗浄水の流入量を増大させるうえで、汚物受け面24の後側領域60の広範囲に凹曲面を設けずともよくなる。これに伴い、汚物受け面24の後側領域60をつっかえずに拭き易くなり、良好な清掃性を得られる。 In order to increase the amount of washing water flowing into the water storage section 26 from the rear, a concave curved surface is provided in a wide range of the rear region 60 of the dirt receiving surface 24, and the concave curved surface allows the washing water to flow into the water storage section 26. There are ways to induce this. In this regard, according to the present embodiment, the rear region 60 of the waste receiving surface 24 is provided with a flat shelf surface 66 and a convex curved connecting surface 70, and at least the slope of the shelf surface 66 allows water to accumulate. The amount of washing water flowing into the section 26 from the rear can be increased. Therefore, in order to increase the amount of washing water flowing from the rear into the water storage section 26, it is not necessary to provide a concave curved surface in a wide range of the rear region 60 of the dirt receiving surface 24. Accordingly, the rear region 60 of the dirt receiving surface 24 can be easily wiped without getting stuck, and good cleaning performance can be obtained.

なお、連結面70は、平面視において、溜水部26の周りで全周に亘り連なるように設けられる。連結面70は、後側領域60以外では棚面66の内周端66aに連ならない箇所もある。連結面70の曲率半径は、平面視において溜水部26の前方にて便鉢部18の左右中心線Lcと重なる位置Eで最も小さくなるように設定される。 In addition, the connection surface 70 is provided so that it may continue all around the water storage part 26 in planar view. The connecting surface 70 has some parts other than the rear region 60 where it does not connect to the inner circumferential end 66a of the shelf surface 66. The radius of curvature of the connecting surface 70 is set to be smallest at a position E where it overlaps with the left-right center line Lc of the toilet bowl section 18 in front of the water storage section 26 in plan view.

次に、水洗大便器10の他の特徴を説明する。図19は、図4の一部の拡大図である。便鉢部18は、便鉢部18の内周面を構成し、第1吐水孔30Aの内側面30cに連なるとともに、第1吐水孔30Aの中心軸線Ldに沿った吐出方向Paに延びる面部分18dを有する。本実施形態の面部分18dは前述の垂下壁部34が構成している。 Next, other features of the flush toilet 10 will be explained. FIG. 19 is an enlarged view of a portion of FIG. 4. The toilet bowl part 18 constitutes the inner circumferential surface of the toilet bowl part 18, and is a surface portion that is continuous with the inner surface 30c of the first water spouting hole 30A and extends in the discharge direction Pa along the central axis Ld of the first water spouting hole 30A. It has 18d. The above-described hanging wall portion 34 constitutes the surface portion 18d of this embodiment.

第1吐水孔30Aの中心軸線Ldを平面視において吐出方向Paに延長した線を延長線Leという。本実施形態において、この延長線Leは、平面視において、溜水部26を避けた箇所を通るように設けられる。 A line extending the central axis Ld of the first water discharge hole 30A in the discharge direction Pa in plan view is referred to as an extension line Le. In this embodiment, the extension line Le is provided so as to pass through a location avoiding the water reservoir 26 in plan view.

便鉢部18の面部分18dは、第1吐水孔30Aの内側面30cから吐出方向Paに向かうにつれて、平面視において、前述の延長線Leを挟んで溜水部26とは反対側(図19の紙面の左側)に向けて延びるように形成される。このような面部分18dは、第1吐水孔30Aの内側面30cとの間で、平面視において鈍角の角部30dを形成している。面部分18dは、吐出方向Paに向かうにつれて、前述の延長線Leから溜水部26とは反対側に離れてから近づくように湾曲している。 The surface portion 18d of the toilet bowl portion 18 moves from the inner surface 30c of the first water spouting hole 30A toward the discharge direction Pa to the side opposite to the water storage portion 26 across the above-mentioned extension line Le (see FIG. 19). It is formed so as to extend toward the left side of the page. Such a surface portion 18d forms an obtuse corner portion 30d in plan view with the inner surface 30c of the first water discharge hole 30A. The surface portion 18d is curved so as to move away from the above-mentioned extension line Le toward the opposite side of the water reservoir portion 26 and then approach the side toward the discharge direction Pa.

これにより、第1吐水孔30Aから吐き出される洗浄水は、第1吐水孔30Aから吐き出された直後、便鉢部18の面部分18dに沿って流れ難くなり、その面部分18dに沿って流れる水の流量を抑えられる。この利点を説明する。 As a result, the cleaning water discharged from the first water spouting hole 30A becomes difficult to flow along the surface portion 18d of the toilet bowl portion 18 immediately after being discharged from the first water spouting hole 30A, and the water flowing along the surface portion 18d The flow rate can be reduced. Explain this advantage.

第1吐水孔30Aから吐き出される洗浄水に対して、平面視において、前述の延長線Leに対して溜水部26側から第2水流Fweが合流したときを考える。このとき、第1吐水孔30Aから吐き出される洗浄水には、第2水流Fweと合流することによって、便鉢部18の面部分18dに近づくような力成分Faが付与される。この場合に、本実施形態によれば、便鉢部18の面部分18dに沿って流れる水の流量を抑えられる。よって、便鉢部18の面部分18dに近づくような力成分Faが付与されても、第1吐水孔30Aから吐き出される洗浄水の多くが便鉢部18の面部分18dに勢いよくぶつかる事態を避けられ、飛沫の発生を抑えられる。 Consider a case where the second water flow Fwe joins the above-mentioned extension line Le from the water reservoir 26 side in plan view with respect to the cleaning water discharged from the first water discharge hole 30A. At this time, the washing water discharged from the first water discharge hole 30A is given a force component Fa that causes it to approach the surface portion 18d of the toilet bowl portion 18 by merging with the second water flow Fwe. In this case, according to the present embodiment, the flow rate of water flowing along the surface portion 18d of the toilet bowl portion 18 can be suppressed. Therefore, even if a force component Fa that approaches the surface portion 18d of the toilet bowl portion 18 is applied, a situation where most of the washing water discharged from the first water spouting hole 30A hits the surface portion 18d of the toilet bowl portion 18 with force is prevented. It can be avoided and the generation of droplets can be suppressed.

図20(a)は、図3のF-F線断面図であり、図20(b)は、図3のG-G線断面図であり、図20(c)は、図3のH-H線断面図である。 20(a) is a cross-sectional view taken along line FF in FIG. 3, FIG. 20(b) is a cross-sectional view taken along line GG in FIG. 3, and FIG. 20(c) is a cross-sectional view taken along line H-- It is an H line sectional view.

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, modifications of each component will be explained.

便器本体12は、床置き式である例を説明したが、壁掛け式でもよい。水洗大便器10は、洗い落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、サイホン式である。洗浄水供給装置14は、その具体例について特に限定されない。洗浄水供給装置14は、たとえば、フラッシュバルブ等を用いて構成されてもよい。 Although the toilet main body 12 has been described as a floor-standing type, it may be wall-mounted. The flush toilet bowl 10 may be cleaned using a cleaning method other than the flush type. This cleaning method is, for example, a siphon method. The specific example of the washing water supply device 14 is not particularly limited. The wash water supply device 14 may be configured using, for example, a flush valve or the like.

(第1の工夫点に関して)
垂下壁部34の孔形成部36A、36Bの高さHaは、前述の高さHbの半分未満の大きさに設定されてもよい。
(Regarding the first point)
The height Ha of the hole forming portions 36A and 36B of the hanging wall portion 34 may be set to be less than half of the above-mentioned height Hb.

便器本体12は、上面側部分38A、38Bと便鉢側部分40とを接合せずに、単数の鋳込み成形品により構成されてもよい。 The toilet main body 12 may be configured by a single cast molded product without joining the upper surface side portions 38A, 38B and the toilet bowl side portion 40.

上面側部分38A、38Bの垂下側壁部44A、44Bは、便鉢側部分40の第2段部54とは異なる箇所に接触して支持されてもよい。たとえば、便鉢側部分40の汚物受け面24の外周端部24bに連なる箇所に接触して支持されてもよい。上面側部分38A、38Bの垂下側壁部44A、44Bは、便鉢側部分40の第2段部54の側面54bに接触していなくともよい。 The hanging side walls 44A, 44B of the upper surface side portions 38A, 38B may contact and be supported at a different location from the second step portion 54 of the toilet bowl side portion 40. For example, it may be supported by contacting a portion of the toilet bowl side portion 40 that is continuous with the outer peripheral end portion 24b of the waste receiving surface 24. The hanging side wall parts 44A, 44B of the upper surface side parts 38A, 38B do not need to be in contact with the side surface 54b of the second step part 54 of the toilet bowl side part 40.

(第2の工夫点に関して)
便器本体12は第1吐水部28Aのみを有し、第2吐水部28Bを有していなくともよい。この場合、第1吐水部28Aは、第1吐水孔30Aから吐き出される洗浄水によって、汚物受け面24の後側領域60を周方向に伝う水流を形成していればよい。この水流とは、たとえば、前述の第1水流Fwdである。この場合、第1吐水部28Aの第1吐水孔30Aの位置は特に限定されない。たとえば、第1吐水孔30Aは、実施形態で第2吐水孔30Bのある位置に形成されていてもよい。
(Regarding the second point)
The toilet main body 12 may have only the first water spouting part 28A and may not have the second water spouting part 28B. In this case, the first water spouting section 28A only needs to form a water flow that travels in the circumferential direction in the rear region 60 of the dirt receiving surface 24 using the cleaning water discharged from the first water spouting hole 30A. This water flow is, for example, the above-mentioned first water flow Fwd. In this case, the position of the first water spouting hole 30A of the first water spouting part 28A is not particularly limited. For example, the first water spouting hole 30A may be formed at a certain position of the second water spouting hole 30B in the embodiment.

第1吐水孔30A、第2吐水孔30B、第1旋回流Fwa、第1分流Fwb、第1水流Fwd、第2水流Fwe、誘導流Fwf等は、実施形態での位置に対して左右で逆の位置に設けてもよい。たとえば、第1吐水部28Aは、便鉢部18内に時計回り方向に向けて第1吐水孔30Aから洗浄水を吐き出すことによって、汚物受け面24の後側領域60を時計回り方向に伝う第1水流Fwdを形成してもよい。この場合、溜水部26は、溜水部26の左右片側となる左側立壁面26bに接触しつつ溜水部26に後方から流入する水流によって誘導流Fwfを形成するように構成されていればよい。 The first water discharge hole 30A, the second water discharge hole 30B, the first swirling flow Fwa, the first branch flow Fwb, the first water flow Fwd, the second water flow Fwe, the induced flow Fwf, etc. are reversed on the left and right with respect to the positions in the embodiment. It may be provided at the position. For example, the first water spouting section 28A discharges flushing water from the first water spouting hole 30A in the clockwise direction into the toilet bowl section 18, so that the first water discharging section 28A discharges the wash water in the clockwise direction from the rear region 60 of the waste receiving surface 24. One water flow Fwd may be formed. In this case, if the water reservoir section 26 is configured to form an induced flow Fwf by the water flow flowing into the water reservoir section 26 from the rear while contacting the left vertical wall surface 26b which is one of the left and right sides of the water reservoir section 26. good.

汚物受け面24の棚面66は、汚物受け面24の後側領域60からいずれかの横側領域62A、62Bにかけて連続するように形成されていればよい。 The shelf surface 66 of the dirt receiving surface 24 may be formed continuously from the rear region 60 of the dirt receiving surface 24 to any of the lateral regions 62A, 62B.

汚物受け面24の後側領域60での棚面66の勾配は、便鉢部18の周方向に連続的に変化するように設定される例を説明した。この他にも、後側領域60での棚面66の勾配は、便鉢部18の周方向に段階的に変化してもよいし、後側領域60で周方向に一定に設定されてもよい。いずれにしても、後側領域60での棚面66の勾配は、横側領域62A、62Bでの棚面66の勾配より大きくなるように設定されていればよい。また、後側領域60での棚面66の勾配は、一対の横側領域62A、62Bのうちいずれかの横側領域62A、62Bでの棚面66の勾配より大きくなるように設定されていればよい。 An example has been described in which the slope of the shelf surface 66 in the rear region 60 of the waste receiving surface 24 is set to change continuously in the circumferential direction of the toilet bowl portion 18. In addition, the slope of the shelf surface 66 in the rear region 60 may change stepwise in the circumferential direction of the toilet bowl portion 18, or may be set constant in the circumferential direction in the rear region 60. good. In any case, the slope of the shelf surface 66 in the rear region 60 may be set to be larger than the slope of the shelf surface 66 in the lateral regions 62A, 62B. Further, the slope of the shelf surface 66 in the rear region 60 should be set to be larger than the slope of the shelf surface 66 in either of the pair of lateral regions 62A, 62B. Bye.

汚物受け面24の後側領域60の連結面70は凹曲面状をなしていてもよい。 The connecting surface 70 of the rear region 60 of the dirt receiving surface 24 may have a concave curved shape.

汚物受け面24の後側領域60での連結面70の曲率半径は、便鉢部18の周方向に連続的に変化するように設定される例を説明した。この他にも、後側領域60での連結面70の曲率半径は、便鉢部18の周方向に段階的に変化してもよいし、後側領域60で周方向に一定に設定されてもよい。いずれにしても、後側領域60での連結面70の曲率半径は、横側領域62A、62Bでの曲率半径より大きくなるように設定されていればよい。また、後側領域60での連結面70の曲率半径は、一対の横側領域62A、62Bのうちいずれかの横側領域62A、62Bでの連結面70の曲率半径より大きくなるように設定されていればよい。 An example has been described in which the radius of curvature of the connecting surface 70 in the rear region 60 of the waste receiving surface 24 is set to change continuously in the circumferential direction of the toilet bowl portion 18. In addition, the radius of curvature of the connecting surface 70 in the rear region 60 may change stepwise in the circumferential direction of the toilet bowl portion 18, or may be set constant in the circumferential direction in the rear region 60. Good too. In any case, the radius of curvature of the connecting surface 70 in the rear region 60 may be set to be larger than the radius of curvature in the lateral regions 62A, 62B. Further, the radius of curvature of the connecting surface 70 in the rear region 60 is set to be larger than the radius of curvature of the connecting surface 70 in any of the lateral regions 62A, 62B of the pair of lateral regions 62A, 62B. All you have to do is stay there.

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、請求の範囲に規定された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 above in detail. The embodiments and modifications described above are merely 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 modifications, additions, deletions, etc. of constituent elements may be made without departing from the idea of the invention defined in the claims. Design changes are possible. In the above-mentioned embodiment, the content that allows such design changes is emphasized by using the notations such as "in the embodiment" and "in the embodiment", but even if the content does not have such a notation, the design may change. Changes are allowed. Any combination of the above components is also effective as an aspect of the present invention. The hatching added 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、以下の項目に記載の発明が含まれているともいえる。 When the inventions embodied by the above embodiments and modified examples are generalized, it can be said that the inventions described in the following items are included.

(第1項目)
便鉢部と、
前記便鉢部内に周方向の一方側に向けて第1吐水孔から洗浄水を吐き出すための第1吐水部と、を備え、
前記便鉢部は、前記便鉢部の内周面を構成し、前記第1吐水孔の内側面から前記第1吐水孔の中心軸線に沿った吐出方向に延びる面部分を有し、
前記面部分は、前記第1吐水孔の内側面から前記吐出方向に向かうにつれて、平面視において前記中心軸線を挟んで前記溜水部とは反対側に向けて延びるように形成される便器本体。
(1st item)
A toilet bowl part,
a first water spouting portion for discharging cleansing water from a first water spouting hole toward one side in the circumferential direction within the toilet bowl portion;
The toilet bowl part has a surface portion that constitutes an inner circumferential surface of the toilet bowl part and extends from the inner surface of the first water spouting hole in the discharge direction along the central axis of the first water spouting hole,
The surface portion is formed to extend from the inner surface of the first water spouting hole toward the discharge direction toward the side opposite to the water storage portion across the central axis line in plan view.

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。 When the invention embodied by the above embodiments and modifications is generalized, the following technical idea is derived. Hereinafter, the embodiments described in the problem to be solved by the invention will be explained.

第2態様の便器本体は、第1態様において、前記汚物受け面は、前記溜水部の立壁面と前記棚面とを連結するとともに前記棚面に連なる凸曲面状の連結面を有し、前記連結面は、前記汚物受け面の前記後側領域に少なくとも設けられてもよい。
この態様によれば、溜水部への後方からの洗浄水の流入量を増大させるうえで、汚物受け面の後側領域の広範囲に凹曲面を設けずともよくなる。これに伴い、汚物受け面の後側領域をつっかえずに拭き易くなり、良好な清掃性を得られる。
In the toilet main body of a second aspect, in the first aspect, the waste receiving surface has a convex curved connecting surface that connects the vertical wall surface of the water storage part and the shelf surface and continues to the shelf surface; The connecting surface may be provided at least in the rear region of the dirt receiving surface.
According to this aspect, in order to increase the amount of washing water flowing into the water reservoir from the rear, it is not necessary to provide a concave curved surface in a wide range of the rear region of the dirt receiving surface. Accordingly, the rear region of the dirt receiving surface can be easily wiped without getting stuck, and good cleaning performance can be obtained.

第3態様の便器本体は、第2態様において、前記連結面は、前記汚物受け面の前記横側領域にも設けられ、前記後側領域での前記連結面の径方向での曲率半径は、前記横側領域での前記連結面の径方向での曲率半径より大きくなるように設定されてもよい。
この態様によれば、後側領域での連結面の曲率半径を横側領域での連結面の曲率半径以下にする場合と比べ、凸曲面状の連結面が形成されている径方向での範囲を広くできる。これに伴い、後側領域で連結面上を通る洗浄水の量を増やすことができ、連結面から溜水部に流し落とせる洗浄水の量を増やし易くなる。この結果、溜水部の後方からの洗浄水の流入量をさらに増大でき、汚物排出能力の向上を図れる。
In the toilet main body of a third aspect, in the second aspect, the connecting surface is also provided in the lateral region of the waste receiving surface, and the radius of curvature of the connecting surface in the rear region is: The radius of curvature may be set to be larger than the radius of curvature in the radial direction of the connecting surface in the lateral region.
According to this aspect, compared to the case where the radius of curvature of the connecting surface in the rear region is equal to or less than the radius of curvature of the connecting surface in the lateral region, the range in the radial direction in which the convexly curved connecting surface is formed. can be expanded. Accordingly, it is possible to increase the amount of cleaning water that passes over the connecting surface in the rear region, and it becomes easier to increase the amount of cleaning water that can flow down from the connecting surface to the water reservoir. As a result, the amount of washing water flowing in from the rear of the water storage section can be further increased, and the dirt discharge capability can be improved.

第4態様の便器本体は、第1から第3態様のいずれかにおいて、前記第1吐水部は、前記第1吐水孔から洗浄水を吐き出すことによって、前記便鉢部の左右一方側の第1側方部分を後方に伝う第1旋回流を形成し、前記溜水部より後方にて前記第1側方部分に形成される第2吐水孔を有し、前記便鉢部内に前記周方向の一方側に向けて前記第2吐水孔から洗浄水を吐き出すことによって、前記溜水部に後方から流入する第1水流を形成する第2吐水部を備え、前記第1水流は、前記第1旋回流の一部と合流してから、前記立壁面に接触しつつ前記溜水部内に後方から流入するように形成されてもよい。
この態様によれば、溜水部に後方から流入する水流の流量を増大でき、汚物排出能力の向上を図れる。
In the toilet bowl main body of a fourth aspect, in any one of the first to third aspects, the first water spouting section discharges flush water from the first water spouting hole, thereby discharging flush water from the first water spouting hole on one side of the toilet bowl section. A first swirling flow is formed rearward in the side portion, and a second water spout hole is formed in the first side portion rearward from the water storage portion, and a flow in the circumferential direction is formed in the toilet bowl portion. a second water spouting section configured to form a first water flow flowing into the water storage section from behind by discharging wash water from the second water spouting hole toward one side; After merging with a portion of the flow, it may be formed so as to flow into the water reservoir from the rear while contacting the vertical wall surface.
According to this aspect, it is possible to increase the flow rate of the water flow flowing into the water storage section from the rear, and it is possible to improve the filth discharge ability.

第5態様の便器本体は、鉢状の汚物受け面、及び、前記汚物受け面の下端縁から下方に窪む溜水部を有する便鉢部と、前記便鉢部の底部に接続される便器排水路と、前記便鉢部内に周方向の一方側に向けて第1吐水孔から洗浄水を吐き出すことによって、前記便鉢部の左右一方側の第1側方部分を後方に伝う第1旋回流を形成する第1吐水部と、前記溜水部より後方にて前記第1側方部分に形成される第2吐水孔を有し、前記便鉢部内に前記周方向の一方側に向けて前記第2吐水孔から洗浄水を吐き出すことによって、前記溜水部に後方から流入する第1水流を形成する第2吐水部と、を備え、前記溜水部は、前記溜水部の左右片側に設けられる立壁面に接触しつつ前記溜水部に後方から流入する水流によって、前記便器排水路に汚物を押し込む誘導流を形成するように構成され、前記第1水流は、前記第1旋回流の一部と合流してから、前記立壁面に接触しつつ前記溜水部内に後方から流入するように形成される。
この態様によれば、溜水部に後方から流入する水流の流量を増大でき、汚物排出能力の向上を図れる。
A toilet main body according to a fifth aspect includes a toilet bowl portion having a bowl-shaped waste receiving surface, a water storage portion recessed downward from a lower edge of the waste receiving surface, and a toilet bowl connected to the bottom of the toilet bowl portion. a drainage channel, and a first turn that runs backward through a first side portion on one left and right side of the toilet bowl section by discharging wash water from a first water spout hole toward one side in the circumferential direction within the toilet bowl section. It has a first water spouting part that forms a flow, and a second water spouting hole formed in the first side part behind the water storage part, and has a second water spouting hole formed in the first side part behind the water storage part, and has a second water spouting hole formed in the toilet bowl part toward one side in the circumferential direction. a second water spouting section that forms a first water flow flowing into the water reservoir from the rear by discharging cleaning water from the second water spouting hole, and the water reservoir is located on both left and right sides of the water reservoir. The first water flow is configured to form a guided flow that pushes waste into the toilet drainage channel by a water flow flowing into the water storage section from the rear while contacting a vertical wall surface provided in the toilet, and the first water flow is configured to form a guided flow that pushes waste into the toilet drainage channel. After merging with a part of the water tank, the water tank is formed so as to flow into the water storage part from the rear while contacting the vertical wall surface.
According to this aspect, it is possible to increase the flow rate of the water flow flowing into the water storage section from the rear, and it is possible to improve the filth discharge ability.

第6態様の便器本体は、第1から第5態様のいずれかにおいて、前記便鉢部は、前記便鉢部の内周面を構成し、前記第1吐水孔の内側面から前記第1吐水孔の中心軸線に沿った吐出方向に延びる面部分を有し、前記面部分は、前記第1吐水孔の内側面から前記吐出方向に向かうにつれて、平面視において前記中心軸線の延長線を挟んで前記溜水部とは反対側に向けて延びるように形成されてもよい。
この態様によれば、第1吐水孔から吐き出される洗浄水に対して、他の水流と合流することによって、便鉢部の面部分に近づくような力成分が付与される場合を考える。この場合に、第1吐水孔から吐き出される洗浄水の多くが便鉢部の面部分に勢いよくぶつかる事態を避けられ、飛沫の発生を抑えられる。
In the toilet main body of a sixth aspect, in any one of the first to fifth aspects, the toilet bowl part constitutes an inner circumferential surface of the toilet bowl part, and the first water spout is discharged from the inner surface of the first water spout hole. It has a surface portion extending in the discharge direction along the central axis of the hole, and the surface portion extends from the inner surface of the first water spouting hole toward the discharge direction, sandwiching an extension line of the central axis in plan view. The water storage portion may be formed to extend toward the opposite side from the water storage portion.
According to this aspect, a case will be considered in which a force component is applied to the wash water discharged from the first water discharge hole so that it approaches the surface portion of the toilet bowl portion by merging with another water flow. In this case, it is possible to avoid a situation in which much of the washing water discharged from the first water spouting hole hits the surface of the toilet bowl with force, and the generation of splashes can be suppressed.

12…便器本体、18…便鉢部、24…汚物受け面、26…溜水部、26b~26d…立壁面、28A…第1吐水部、28B…第2吐水部、30A…第1吐水孔、30B…第2吐水孔、30c…内側面、56…便器排水路、60…後側領域、62A,62B…横側領域、66…棚面、70…連結面。 12... Toilet bowl body, 18... Toilet bowl part, 24... Filth receiving surface, 26... Water storage part, 26b to 26d... Standing wall surface, 28A... First water spouting part, 28B... Second water spouting part, 30A... First water spouting hole , 30B...Second water discharge hole, 30c...Inner surface, 56...Toilet drain channel, 60...Back region, 62A, 62B...Side region, 66...Shelf surface, 70...Connection surface.

Claims (11)

鉢状の汚物受け面、及び、前記汚物受け面の下端縁から下方に窪む溜水部を有する便鉢部と、
前記便鉢部の底部に接続される便器排水路と、
前記便鉢部内に周方向の一方側に向けて第1吐水孔から洗浄水を吐き出すことによって、前記便鉢部の左右一方側の第1側方部分を後方に伝う第1旋回流を形成する第1吐水部と、
前記溜水部より後方にて前記第1側方部分に形成される第2吐水孔を有し、前記便鉢部内に前記周方向の一方側に向けて前記第2吐水孔から洗浄水を吐き出すことによって、前記溜水部に後方から流入する第1水流を形成する第2吐水部と、を備え、
前記第1旋回流は、前記汚物受け面の前部で、前記汚物受け面から前記溜水部に向けて流れ落ちる第1分流と、前記第1側方部分を後方に向かう第1旋回流の一部とに分かれ、
前記第1側方部分を後方に向かう前記第1旋回流の一部は、前記第1分流より流量が多くなり、
前記第1水流は、前記第1旋回流の一部と合流してから、前記溜水部内に後方から流入するように形成され
記第2吐水孔から吐き出される洗浄水は、前記第1水流と、前記第1水流より後方にて前記汚物受け面を前記周方向の一方側に伝う第2水流とに分かれ、
前記第1水流は、前記第2水流より流量が多くなる便器本体。
a toilet bowl portion having a bowl-shaped filth receiving surface and a water reservoir recessed downward from the lower edge of the filth receiving surface;
a toilet drainage channel connected to the bottom of the toilet bowl section;
By discharging the wash water from the first water spout hole toward one side in the circumferential direction into the toilet bowl part, a first swirling flow is formed that travels rearward through a first side portion on one left and right side of the toilet bowl part. A first water discharge part;
A second water spout hole is formed in the first side portion behind the water storage portion, and flush water is discharged from the second water spout hole toward one side in the circumferential direction into the toilet bowl portion. a second water discharge part that forms a first water flow flowing into the water storage part from the rear;
The first swirling flow is composed of a first branch flow that flows down from the dirt receiving surface toward the water storage part at the front part of the dirt receiving surface, and a first swirling flow that flows backward through the first side part. Divided into sections,
A part of the first swirling flow heading rearward through the first side portion has a larger flow rate than the first branch flow,
The first water flow is formed so as to merge with a part of the first swirling flow and then flow into the water reservoir from the rear ,
The cleaning water discharged from the second water discharge hole is divided into the first water flow and a second water flow that runs behind the first water flow and runs along the dirt receiving surface toward one side in the circumferential direction,
The first water flow has a larger flow rate than the second water flow in the toilet main body.
前記第1水流は、前記第1旋回流の一部と合流していないとき、前記溜水部内に後方から流入する請求項に記載の便器本体。 The toilet main body according to claim 1 , wherein the first water flow flows into the water storage section from the rear when not merging with a part of the first swirling flow. 鉢状の汚物受け面、及び、前記汚物受け面の下端縁から下方に窪む溜水部を有する便鉢部と、
前記便鉢部の底部に接続される便器排水路と、
前記便鉢部内に周方向の一方側に向けて第1吐水孔から洗浄水を吐き出すことによって、前記便鉢部の左右一方側の第1側方部分を後方に伝う第1旋回流を形成する第1吐水部と、
前記溜水部より後方にて前記第1側方部分に形成される第2吐水孔を有し、前記便鉢部内に前記周方向の一方側に向けて前記第2吐水孔から洗浄水を吐き出すことによって、前記溜水部に後方から流入する第1水流を形成する第2吐水部と、を備え、
前記第1旋回流は、前記汚物受け面の前部で、前記汚物受け面から前記溜水部に向けて流れ落ちる第1分流と、前記第1側方部分を後方に向かう第1旋回流の一部とに分かれ、
前記第1側方部分を後方に向かう前記第1旋回流の一部は、前記第1分流より流量が多くなり、
前記第1水流は、前記第1旋回流の一部と合流してから、前記溜水部内に後方から流入するように形成され
記第1水流は、前記第1旋回流の一部と合流していないとき、前記便鉢部の左右他方側の第2側方部分において前記溜水部内に後方から流入する流量より、前記便鉢部の前記第1側方部分において前記溜水部内に後方から流入する流量を多くするように形成される便器本体。
a toilet bowl portion having a bowl-shaped filth receiving surface and a water reservoir recessed downward from the lower edge of the filth receiving surface;
a toilet drainage channel connected to the bottom of the toilet bowl section;
By discharging the wash water from the first water spout hole toward one side in the circumferential direction into the toilet bowl part, a first swirling flow is formed that travels rearward through a first side portion on one left and right side of the toilet bowl part. A first water discharge part;
A second water spout hole is formed in the first side portion behind the water storage portion, and flush water is discharged from the second water spout hole toward one side in the circumferential direction into the toilet bowl portion. a second water discharge part that forms a first water flow flowing into the water storage part from the rear;
The first swirling flow is composed of a first branch flow that flows down from the dirt receiving surface toward the water storage part at the front part of the dirt receiving surface, and a first swirling flow that flows backward through the first side part. Divided into sections,
A part of the first swirling flow heading rearward through the first side portion has a larger flow rate than the first branch flow,
The first water flow is formed so as to merge with a part of the first swirling flow and then flow into the water reservoir from the rear ,
When the first water flow does not merge with a part of the first swirling flow, the flow rate is higher than the flow rate flowing into the water storage section from the rear at the second side portion on the other left and right sides of the toilet bowl section. The toilet main body is formed so as to increase the amount of flow flowing into the water storage section from the rear in the first side portion of the toilet bowl section.
鉢状の汚物受け面、及び、前記汚物受け面の下端縁から下方に窪む溜水部を有する便鉢部と、
前記便鉢部の底部に接続される便器排水路と、
前記便鉢部内に周方向の一方側に向けて第1吐水孔から洗浄水を吐き出すことによって、前記便鉢部の左右一方側の第1側方部分を後方に伝う第1旋回流を形成する第1吐水部と、
前記溜水部より後方にて前記第1側方部分に形成される第2吐水孔を有し、前記便鉢部内に前記周方向の一方側に向けて前記第2吐水孔から洗浄水を吐き出すことによって、前記溜水部に後方から流入する第1水流を形成する第2吐水部と、を備え、
前記第1旋回流は、前記汚物受け面の前部で、前記汚物受け面から前記溜水部に向けて流れ落ちる第1分流と、前記第1側方部分を後方に向かう第1旋回流の一部とに分かれ、
前記第1側方部分を後方に向かう前記第1旋回流の一部は、前記第1分流より流量が多くなり、
前記第1水流は、前記第1旋回流の一部と合流してから、前記溜水部内に後方から流入するように形成され
記第1水流は、前記第1旋回流の一部と合流しているとき、前記便鉢部の前記第1側方部分において前記溜水部内に後方から流入する流量より、前記便鉢部の左右他方側の第2側方部分において前記溜水部内に後方から流入する流量を多くするように形成される便器本体。
a toilet bowl portion having a bowl-shaped filth receiving surface and a water reservoir recessed downward from the lower edge of the filth receiving surface;
a toilet drainage channel connected to the bottom of the toilet bowl section;
By discharging the wash water from the first water spout hole toward one side in the circumferential direction into the toilet bowl part, a first swirling flow is formed that travels rearward through a first side portion on one left and right side of the toilet bowl part. A first water discharge part;
A second water spout hole is formed in the first side portion behind the water storage portion, and flush water is discharged from the second water spout hole toward one side in the circumferential direction into the toilet bowl portion. a second water discharge part that forms a first water flow flowing into the water storage part from the rear;
The first swirling flow is composed of a first branch flow that flows down from the dirt receiving surface toward the water storage part at the front part of the dirt receiving surface, and a first swirling flow that flows backward through the first side part. Divided into sections,
A part of the first swirling flow heading rearward through the first side portion has a larger flow rate than the first branch flow,
The first water flow is formed so as to merge with a part of the first swirling flow and then flow into the water reservoir from the rear ,
When the first water flow merges with a part of the first swirling flow, the flow rate flowing into the toilet bowl portion from the rear in the first side portion of the toilet bowl portion is higher than that of the first water flow. A toilet main body formed so as to increase the flow rate flowing into the water reservoir from the rear at the second side portion on the other left and right side.
鉢状の汚物受け面、及び、前記汚物受け面の下端縁から下方に窪む溜水部を有する便鉢部と、
前記便鉢部の底部に接続される便器排水路と、
前記便鉢部内に周方向の一方側に向けて第1吐水孔から洗浄水を吐き出すことによって、前記便鉢部の左右一方側の第1側方部分を後方に伝う第1旋回流を形成する第1吐水部と、
前記溜水部より後方にて前記第1側方部分に形成される第2吐水孔を有し、前記便鉢部内に前記周方向の一方側に向けて前記第2吐水孔から洗浄水を吐き出すことによって、前記溜水部に後方から流入する第1水流を形成する第2吐水部と、を備え、
前記第1旋回流は、前記汚物受け面の前部で、前記汚物受け面から前記溜水部に向けて流れ落ちる第1分流と、前記第1側方部分を後方に向かう第1旋回流の一部とに分かれ、
前記第1側方部分を後方に向かう前記第1旋回流の一部は、前記第1分流より流量が多くなり、
前記第1水流は、前記第1旋回流の一部と合流してから、前記溜水部内に後方から流入するように形成され
記第1水流は、前記第1旋回流の一部と合流しているとき、前記第1旋回流の一部との合流前に流れていた位置よりも、前記汚物受け面の外周端部寄りの箇所を通るように形成される便器本体。
a toilet bowl portion having a bowl-shaped filth receiving surface and a water reservoir recessed downward from the lower edge of the filth receiving surface;
a toilet drainage channel connected to the bottom of the toilet bowl section;
By discharging the wash water from the first water spout hole toward one side in the circumferential direction into the toilet bowl part, a first swirling flow is formed that travels rearward through a first side portion on one left and right side of the toilet bowl part. A first water discharge part;
A second water spout hole is formed in the first side portion behind the water storage portion, and flush water is discharged from the second water spout hole toward one side in the circumferential direction into the toilet bowl portion. a second water discharge part that forms a first water flow flowing into the water storage part from the rear;
The first swirling flow is composed of a first branch flow that flows down from the dirt receiving surface toward the water storage part at the front part of the dirt receiving surface, and a first swirling flow that flows backward through the first side part. Divided into sections,
A part of the first swirling flow heading rearward through the first side portion has a larger flow rate than the first branch flow,
The first water flow is formed so as to merge with a part of the first swirling flow and then flow into the water reservoir from the rear ,
When the first water flow merges with a portion of the first swirling flow, the outer circumferential end of the dirt receiving surface is lower than the position where the first water flow was flowing before merging with the portion of the first swirling flow. The body of the toilet is formed so that it passes through the closest part.
鉢状の汚物受け面、及び、前記汚物受け面の下端縁から下方に窪む溜水部を有する便鉢部と、
前記便鉢部の底部に接続される便器排水路と、
前記便鉢部内に周方向の一方側に向けて第1吐水孔から洗浄水を吐き出すことによって、前記便鉢部の左右一方側の第1側方部分を後方に伝う第1旋回流を形成する第1吐水部と、
前記溜水部より後方にて前記第1側方部分に形成される第2吐水孔を有し、前記便鉢部内に前記周方向の一方側に向けて前記第2吐水孔から洗浄水を吐き出すことによって、前記溜水部に後方から流入する第1水流を形成する第2吐水部と、を備え、
前記第1旋回流は、前記汚物受け面の前部で、前記汚物受け面から前記溜水部に向けて流れ落ちる第1分流と、前記第1側方部分を後方に向かう第1旋回流の一部とに分かれ、
前記第1側方部分を後方に向かう前記第1旋回流の一部は、前記第1分流より流量が多くなり、
前記第1水流は、前記第1旋回流の一部と合流してから、前記溜水部内に後方から流入するように形成され
記第2吐水孔から吐き出される洗浄水は、前記第1水流と、前記第1水流より後方にて前記汚物受け面を前記周方向の一方側に伝う第2水流とに分かれ、
前記第2水流は、前記第1旋回流の一部と合流しているとき、前記第1旋回流の一部との合流前に流れていた位置よりも、前記汚物受け面の外周端部寄りの箇所を通るように形成される便器本体。
a toilet bowl portion having a bowl-shaped filth receiving surface and a water reservoir recessed downward from the lower edge of the filth receiving surface;
a toilet drainage channel connected to the bottom of the toilet bowl section;
By discharging the wash water from the first water spout hole toward one side in the circumferential direction into the toilet bowl part, a first swirling flow is formed that travels rearward through a first side portion on one left and right side of the toilet bowl part. A first water discharge part;
A second water spout hole is formed in the first side portion behind the water storage portion, and flush water is discharged from the second water spout hole toward one side in the circumferential direction into the toilet bowl portion. a second water discharge part that forms a first water flow flowing into the water storage part from the rear;
The first swirling flow is composed of a first branch flow that flows down from the dirt receiving surface toward the water storage part at the front part of the dirt receiving surface, and a first swirling flow that flows backward through the first side part. Divided into sections,
A part of the first swirling flow heading rearward through the first side portion has a larger flow rate than the first branch flow,
The first water flow is formed so as to merge with a part of the first swirling flow and then flow into the water reservoir from the rear ,
The cleaning water discharged from the second water discharge hole is divided into the first water flow and a second water flow that runs behind the first water flow and runs along the dirt receiving surface toward one side in the circumferential direction,
When the second water flow merges with a portion of the first swirling flow, the second water flow is located closer to the outer peripheral end of the dirt receiving surface than the position where it was flowing before merging with the portion of the first swirling flow. The toilet bowl body is formed to pass through the area.
前記第1分流は、主流として形成される請求項1からのいずれか1項に記載の便器本体。 The toilet main body according to any one of claims 1 to 6 , wherein the first branch flow is formed as a main flow. 主流としての前記第1水流は、主流としての前記第1旋回流の一部と合流してから、前記便器排水路内に流れる請求項1からのいずれか1項に記載の便器本体。 The toilet bowl main body according to any one of claims 1 to 7 , wherein the first water flow as a mainstream flows into the toilet drainage channel after merging with a part of the first swirling flow as a mainstream. 前記第1水流は、前記第1旋回流の一部と合流しているとき、前記第1旋回流の一部と合流していないときよりも、前記溜水部内に後方から流入する流量が増大する請求項1からのいずれか1項に記載の便器本体。 When the first water flow merges with a portion of the first swirling flow, the flow rate flowing into the water storage section from the rear increases than when the first water flow merges with a portion of the first swirling flow. The toilet main body according to any one of claims 1 to 8 . 鉢状の汚物受け面、及び、前記汚物受け面の下端縁から下方に窪む溜水部を有する便鉢部と、
前記便鉢部の底部に接続される便器排水路と、
前記便鉢部内に周方向の一方側に向けて第1吐水孔から洗浄水を吐き出すことによって、前記便鉢部の左右一方側の第1側方部分を後方に伝う第1旋回流を形成する第1吐水部と、
前記溜水部より後方にて前記第1側方部分に形成される第2吐水孔を有し、前記便鉢部内に前記周方向の一方側に向けて前記第2吐水孔から洗浄水を吐き出すことによって、前記溜水部に後方から流入する第1水流を形成する第2吐水部と、を備え、
前記第1旋回流は、前記汚物受け面の前部で、前記汚物受け面から前記溜水部に向けて流れ落ちる第1分流と、前記第1側方部分を後方に向かう第1旋回流の一部とに分かれ、
前記第1側方部分を後方に向かう前記第1旋回流の一部は、前記第1分流より流量が多くなり、
前記第1水流は、前記第1旋回流の一部と合流してから、前記溜水部内に後方から流入するように形成され
記便鉢部は、前記洗浄水を周方向の一方側に導くための棚面を有し、
前記棚面は、前記溜水部より左右いずれかに位置する前記汚物受け面の横側領域に形成され、前記溜水部の前方には形成されない便器本体。
a toilet bowl portion having a bowl-shaped filth receiving surface and a water reservoir recessed downward from the lower edge of the filth receiving surface;
a toilet drainage channel connected to the bottom of the toilet bowl section;
By discharging the wash water from the first water spout hole toward one side in the circumferential direction into the toilet bowl part, a first swirling flow is formed that travels rearward through a first side portion on one left and right side of the toilet bowl part. A first water discharge part;
A second water spout hole is formed in the first side portion behind the water storage portion, and flush water is discharged from the second water spout hole toward one side in the circumferential direction into the toilet bowl portion. a second water discharge part that forms a first water flow flowing into the water storage part from the rear;
The first swirling flow is composed of a first branch flow that flows down from the dirt receiving surface toward the water storage part at the front part of the dirt receiving surface, and a first swirling flow that flows backward through the first side part. Divided into sections,
A part of the first swirling flow heading rearward through the first side portion has a larger flow rate than the first branch flow,
The first water flow is formed so as to merge with a part of the first swirling flow and then flow into the water reservoir from the rear ,
The toilet bowl portion has a shelf surface for guiding the washing water to one side in the circumferential direction,
The shelf surface is formed in a lateral region of the waste receiving surface located on either the left or right side of the water reservoir, and is not formed in front of the water reservoir .
前記汚物受け面は、前記溜水部の立壁面より上方にて前記立壁面に連結される凸曲面状の連結面を有し、
前記連結面は、前記溜水部より前方に設けられる前記汚物受け面の前側領域と、前記溜水部より後側に位置する前記汚物受け面の後側領域とに設けられ、
前記連結面の径方向での曲率半径は、前記前側領域、前記後側領域の順で大きくなるように設定される請求項1から10のいずれか1項に記載の便器本体。
The filth receiving surface has a convex curved connection surface connected to the vertical wall surface above the vertical wall surface of the water storage section,
The connecting surface is provided in a front region of the filth receiving surface located in front of the water reservoir and a rear region of the filth receiving surface located in the rear of the water reservoir,
The toilet main body according to any one of claims 1 to 10 , wherein the radius of curvature of the connecting surface in the radial direction is set to increase in the order of the front region and the rear region.
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JP2015196960A (en) 2014-03-31 2015-11-09 Toto株式会社 Flush toilet bowl
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