JP2020026679A - Water closet - Google Patents

Abstract

To provide a technology capable of restraining washing water from springing to the outside of a toilet bowl part.SOLUTION: A water closet includes: a toilet bowl part 16 that has a bowl-shaped filth receiving surface 24; a rim part 26 that forms an upper end side part of the toilet bowl part 16; and a water discharge part 42 that forms a rotational flow by discharging washing water into the toilet bowl part 16. One surface part 22X of front and rear surface parts of the toilet bowl part 16 is provided with one longitudinal end 16b of the toilet bowl part 16. An upward guide part 72, which is provided on a washing water path leading to the one end 16b of the toilet bowl part 16 from the water discharge part 42 and which at least partially guides the washing water upward, is provided.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a flush toilet.

  Patent Literature 1 discloses a flush toilet including a toilet bowl, a rim that forms an upper end portion of the toilet bowl, and a water discharge unit that forms a swirling flow by discharging cleaning water into the toilet bowl. Is described.

JP 2015-169004 A

  The inner peripheral surface of the rim has a smaller radius of curvature in the front and rear portions of the toilet bowl portion than in the side portion of the toilet bowl portion in plan view. Is given. For this reason, in the front part and the rear part of the toilet bowl, the washing water that tends to rise due to the centrifugal force easily jumps out of the toilet bowl. As a countermeasure against this, a method is usually adopted in which the movement of the washing water is regulated by an overhang surface formed on the inner peripheral surface of the rim portion (see Patent Document 1). The present inventor has recognized that there is a new method for taking this measure.

  One aspect of the present invention has been made in view of such a problem, and one of its objects is to provide a technique capable of suppressing washing water from jumping out of a toilet bowl.

  A first aspect of the present invention for solving the above-mentioned problem is a flush toilet. The flush toilet of the first aspect has a toilet bowl portion having a bowl-shaped waste receiving surface, a rim portion forming an upper end portion of the toilet bowl portion, and a swirling flow by discharging flush water into the toilet bowl portion. A water discharge part that forms the toilet bowl part, and one of the front surface part and the rear surface part of the toilet bowl part is provided with one end in the front-rear direction of the toilet bowl part, and the one end part from the water discharge part. And an upper guide portion provided on the washing water path leading to at least a part of the washing water.

  According to the first aspect, on the washing water path, a guided flow that is guided upward by the upper guide portion and then directed downward by its own weight can be formed. For this reason, the upward velocity component of the water flow traveling on one surface of the toilet bowl portion can be reduced as compared with the case where such an induced flow is not formed, and it is possible to suppress the flushing of the washing water from the one surface portion.

  Another embodiment of the present invention for solving the aforementioned problems is a flush toilet. A flush toilet according to another aspect has a toilet bowl portion having a bowl-shaped waste receiving surface, a rim portion forming an upper end portion of the toilet bowl portion, and a swirling flow by discharging flush water into the toilet bowl portion. A flushing toilet comprising: a flushing toilet that forms a toilet bowl, wherein one of a front surface and a rear surface of the toilet bowl is provided with one end in the front-rear direction of the toilet bowl, The flush toilet is configured to guide at least a portion of the wash water upward on the wash water path from the water discharge section to the one end, so that the flush toilet flows upward on the wash water path and then flows downward. It is configured to form a flow.

  According to this aspect, the upward velocity component of the water flow traveling on one surface of the toilet bowl portion can be reduced as compared with the case where the induced flow is not formed on the cleaning water path, and the splash of the wash water from the one surface portion can be reduced. Can be suppressed.

It is explanatory drawing which shows the toilet bowl apparatus of 1st Embodiment together with a functional block. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a top view of a flush toilet of a 1st embodiment. FIG. 5A is a cross-sectional view taken along line CC of FIG. 6, and FIG. 5B is a cross-sectional view taken along line DD of FIG. FIG. 3 is an enlarged view of a part of FIG. 2. 7A to 7C are cross-sectional views taken along lines II, II-II, and III-III in FIG. 8A and 8B are cross-sectional views taken along lines IV-IV and VV in FIG. It is a figure which shows the flow of wash water in the flush toilet of 1st Embodiment. It is the figure which looked at the flush toilet of 1st Embodiment from the upper left rear. It is sectional drawing which looked at a part of flush toilet of 1st Embodiment from the left side. It is EE sectional drawing of FIG. It is FF sectional drawing of FIG. It is explanatory drawing of the centrifugal force which acts on washing water. It is a side sectional view showing a part of flush toilet of a 2nd embodiment.

  Hereinafter, in the embodiments and the modified examples, the same components are denoted by the same reference numerals, and overlapping description will be omitted. In each of the drawings, for convenience of description, some of the components are appropriately omitted, or the dimensions of the components are appropriately enlarged or reduced. The drawings should be viewed according to the orientation of the reference numerals.

(First Embodiment)
An outline of a toilet device 12 using a flush toilet 10 (hereinafter simply referred to as the toilet 10) of the first embodiment will be described. FIG. 1 is an explanatory diagram showing the toilet apparatus 12 together with functional blocks. FIG. 1 is also a plan view of the toilet bowl 10. FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a sectional view taken along line BB of FIG.

  Hereinafter, description will be made using the front-back direction X, the left-right direction Y, and the up-down direction Z of the toilet bowl 10. These direction axes constitute an orthogonal coordinate system, and correspond to the direction of a seated person who sits on a toilet seat (not shown) attached to the toilet bowl 10 in a normal posture. The front-rear direction X and the left-right direction Y are horizontal directions, and the up-down direction Z is a vertical direction.

  The toilet device 12 includes a flush water supply device 14 that supplies flush water to the toilet 10 in addition to the toilet 10. The cleaning water supply device 14 is configured using, for example, a water storage tank, but may be configured using a flash valve or the like.

  The toilet 10 of the present embodiment is a Western-style toilet. The toilet bowl 10 of the present embodiment is made of pottery, but may be made of resin or the like. The toilet bowl 10 includes a toilet bowl 16 and a toilet drainage channel 18 connected to the bottom of the toilet bowl 16. A recess 20 is formed on the upper surface of the toilet bowl 10 to accommodate a part of a mechanical device (not shown) such as a local cleaning device. The toilet drainage channel 18 is a passage for dirt and water discharged from the toilet bowl 16 to the sewage-side waterway.

  The toilet bowl 16 has a bowl-shaped waste receiving surface 24 for receiving waste and a rim 26 forming an upper end portion of the toilet bowl 16. The inner peripheral surface of the rim portion 26 is provided in a range from the upper end inner edge portion 16 a of the toilet bowl portion 16 to the outer peripheral end portion 24 a of the waste receiving surface 24. Hereinafter, a description will be given using the circumferential direction and the radial direction of the toilet bowl 16. The “circumferential direction” refers to a direction around the center Cp of the upper end inner edge 16a of the toilet bowl 16 in plan view, and the “radial direction” refers to a direction perpendicular to a vertical line passing through the center Cp.

  The toilet bowl part 16 has a water storage part 28 which is depressed downward from the lower end edge part 24 b of the waste receiving surface 24. The reservoir section 28 forms the bottom of the toilet bowl section 16 and has a bottomed shape. An inlet 18 a of the toilet drainage channel 18 is opened at the bottom of the reservoir 28. Reservoir (not shown) that is a part of the sealed water is stored in the reservoir 28.

  FIG. 4 is another plan view of the toilet bowl 10. The inner peripheral surface of the rim portion 26 has, in plan view, a front region 30F including a front end, a rear region 30B including a rear end, and left and right intermediate regions 30S connecting the front region 30F and the rear region 30B. The front region 30F has a curved surface with a radius of curvature within the first range R1 in plan view, and the rear region 30B has a curved surface with a radius of curvature within the second range R2. The intermediate region 30S has a curved surface with a radius of curvature within a third range R3 that is larger than the radius of curvature of the first range R1 and the second range R2. For example, the first range R1 is 70 mm to 120 mm, the second range R2 is 100 mm to 130 mm, and the third range R3 is 200 mm to 530 mm. As described above, the inner peripheral surface of the rim portion 26 has an oval shape in plan view in which the radius of curvature in the front region 30F and the rear region 30B is smaller than the radius of curvature in the intermediate region 30S. Note that the first range R1 and the second range R2 only need to have a radius of curvature smaller than the third range R3, and there is no limitation on the magnitude relationship between them.

  Hereinafter, the toilet bowl section 16 will be described by dividing it into four sections. Specifically, a pair of side surface portions 22R and 22L provided on both left and right sides of the toilet bowl portion 16, a front surface portion 22F provided on the front side of the toilet bowl portion 16, and a rear surface portion 22B provided on the rear side of the toilet bowl portion 16 The toilet bowl part 16 is divided. The pair of side surfaces 22R and 22L include a right side surface 22R on the right side which is one side on the left and right, and a left side surface portion 22L on the left side which is the other side on the left and right.

  These are separated by the next equal lines Lb1 to Lb3 and the left and right center lines Lc. Among the three equal lines Lb1 to Lb3, among the three equal lines Lb1 to Lb3 that divide the maximum front-rear dimension La of the inner surface portion of the toilet bowl 16 into four parts in plan view, the frontmost front equal line Lb1 And the rearmost rear bisector Lb3. The left-right center line Lc refers to a bisector that bisects the maximum left-right dimension of the inner surface portion of the toilet bowl 16 in plan view. The equal lines Lb1 to Lb3 extend along the left-right direction Y, and the left-right center line Lc extends along the front-rear direction X.

  The pair of side surfaces 22R and 22L are located between the front equal line Lb1 and the rear equal line Lb3, the front surface 22F is located forward of the front equal line Lb1, and the rear surface 22B is equal to the rear equal line. Behind the line Lb3. The right side portion 22R is on the right side of the left and right center line Lc, and the left side portion 22L is on the left side of the left and right center line Lc.

  Please refer to FIG. An opening 32 is formed in the inner peripheral surface of the rim 26. The opening 32 of the present embodiment is formed only on one of the left and right side surfaces (the right side portion 22R) of the toilet bowl portion 16, and is formed on the left and right side surfaces (the left side portion 22L), the front surface portion 22F, and the rear surface portion 22B. Is not formed.

  On the inner peripheral surface of the rim portion 26, at one of the front surface portion 22 </ b> F and the rear surface portion 22 </ b> B of the toilet bowl portion 16, the outer peripheral end 24 a of the waste receiving surface 24 extends from the upper end inner edge portion 16 a of the toilet bowl portion 16. A continuous surface 40 that is continuous without forming an overhang surface is provided. The overhang surface in this specification is a downward surface having an inclination angle of 60 ° or more with respect to a vertical plane, and is a surface formed at a location different from the water outlet 44 (described later). The “one surface portion 22X” here refers to the front surface portion 22F of the toilet bowl 16 in the present embodiment. The front end of the toilet bowl 16 which is one end 16b of the toilet bowl 16 in the front-rear direction X is provided on the one surface 22X.

  The continuous surface 40 of the present embodiment is provided on the inner peripheral surface of the rim portion 26 in a range other than the opening portion 32 over the entire circumference of the toilet bowl portion 16. Specifically, the continuous surface 40 is provided in the entire circumferential range of the front surface portion 22F, the rear surface portion 22B, and the left side surface portion 22L of the toilet bowl portion 16. The continuous surface 40 is provided in a portion other than the opening 32 in the entire circumferential range of the right side portion 22 </ b> R of the toilet bowl 16.

  The continuous surface 40 of the present embodiment is provided so as to gradually extend radially inward from the upper end inner edge portion 16a of the toilet bowl portion 16 downward. This makes it easier to visually grasp the dirt on the continuous surface 40 than when a portion extending radially outward is provided on the way downward, thereby facilitating the cleaning operation. From a similar viewpoint, the continuous surface 40 may be provided to extend substantially vertically downward from the upper end inner edge 16a of the toilet bowl 16. In addition, the continuous surface 40 may be a combination of a portion extending radially inward as it goes downward and a portion extending substantially vertically downward. The term “substantially” in the present specification includes not only a case where the above-mentioned conditions are strictly satisfied but also a case where the position is shifted by an error such as a dimensional tolerance or a manufacturing error.

  The toilet bowl 10 includes a water discharge unit 42 that forms a swirling flow Fa (see FIG. 9 described later) by discharging cleaning water into the toilet bowl unit 16. The water discharging section 42 discharges the washing water into the toilet bowl 16 through the opening 32 of the toilet bowl 16. The water discharging section 42 of the present embodiment is provided at the back side of the opening 32 and is provided at a position not exposed to the outside in plan view. The swirling flow Fa passes through one end portion 16b in the front-rear direction X of the toilet bowl portion 16 provided on the one surface portion 22X (the front surface portion 22F) of the toilet bowl portion 16 and then to the front surface portion 22F of the toilet bowl portion 16 and to the rear. It passes through the other end 16c of the toilet bowl 16 provided on the other surface of the surface 22B. The other end 16 c in the present embodiment is a rear end of the toilet bowl 16.

  As shown in FIG. 2, the toilet 10 includes a jet water outlet 41 that discharges flush water toward a downstream side of the toilet drainage channel 18. The jet water outlet 41 of the present embodiment is formed at the tip of a jet nozzle 43 attached to the toilet 10.

  FIG. 5 is a plan sectional view showing a part of FIG. FIG. 5A is a cross-sectional view taken along the line CC of FIG. 6 described below, and FIG. 5B is a cross-sectional view taken along the line DD of FIG. The water discharge section 42 has a water discharge port 44 opened on the inner peripheral surface of the rim section 26, and a water passage 46 that guides the cleaning water supplied from the cleaning water supply device 14 to the water discharge port 44. The water outlet 44 of the present embodiment is open forward, and is located in the toilet bowl 16 on one side in the circumferential direction (counterclockwise direction on the paper surface of FIG. 5) which is the turning direction Dt of the swirling flow Fa. Spray the washing water toward it.

  FIG. 6 is an enlarged view of a part of FIG. 7A to 7C are cross-sectional views taken along lines II, II-II, and III-III in FIG. 8A and 8B are cross-sectional views taken along lines IV-IV and VV in FIG.

  As shown in FIGS. 5 to 8, the toilet bowl 10 includes a water guide channel 48 that guides the wash water discharged from the water discharge section 42 in the turning direction Dt. The water guide channel 48 includes a shelf surface 50 that receives the wash water and an inner peripheral surface of the rim portion 26. The shelf surface 50 is provided on an outer peripheral portion of the waste receiving surface 24. The shelf surface 50 of the present embodiment includes a convex curved surface portion 52 that forms the inner peripheral end of the shelf surface 50, a flat surface portion 54 provided on the outer peripheral side of the convex curved surface portion 52, and an outer peripheral end of the shelf surface 50. And a curved surface portion 58. The shelf surface 50 is connected to the concave curved surface portion 56 of the waste receiving surface 24 located below the shelf surface 50 via the convex curved surface portion 52. The vertical cross section of the flat surface portion 54 is formed to have a gentler gradient than the upper end portion of the concave curved surface portion 56.

  As shown in FIG. 1, the shelf surface 50 of the present embodiment is formed so as to be continuous from the rear surface portion 22B of the toilet bowl portion 16 to the front surface portion 22F via each of the pair of side surface portions 22R and 22L. You. The shelf surface 50 of the present embodiment is formed over the entire range in the circumferential direction by the pair of side surfaces 22R and 22L and the rear surface 22B, and is formed in a part of the circumferential direction by the front surface 22F.

  As shown in FIGS. 5 to 8, a part of the water conduit 48 of the present embodiment is formed so as to extend from the water outlet 44 in the swirling direction Dt of the swirling flow Fa and pass through the opening 32 in plan view. You. The shelf surface 50 of the present embodiment is formed so as to smoothly connect to the bottom surface of the water outlet 44.

  The curved surface portion 58 forms a lower inner corner portion of the water conduit 48 and has a concave curved surface shape. The curved surface portion 58 has a first constant section 60, an increasing section 62, a second constant section 64, a decreasing section 66, and a third constant section 68 in order in the turning direction Dt of the swirling flow Fa. The curved surface portion 58 is provided such that a radius of curvature in a vertical section smoothly changes in a range from the first constant section 60 to the third constant section 68. This means that the radius of curvature changes abruptly in this range and no step is formed.

  The first constant section 60 is continuous with the water discharge port 44 and is formed to have a substantially constant radius of curvature with a first radius of curvature Ra toward the turning direction Dt of the swirling flow Fa.

  The increasing section 62 is continuous with the first constant section 60 and is formed such that the radius of curvature continuously increases from the first radius of curvature Ra to the second radius of curvature Rb toward the swirling direction Dt of the swirling flow Fa.

  The second constant section 64 connects the increasing section 62 and the decreasing section 66 and is formed to have a substantially constant radius of curvature at the second radius of curvature Rb toward the turning direction Dt of the swirling flow Fa.

  The decreasing section 66 is continuous with the third constant section 68 and is formed such that the radius of curvature continuously decreases from the second radius of curvature Rb to the third radius of curvature Rc toward the swirling direction Dt of the swirling flow Fa.

  The third constant section 68 is formed to have a substantially constant radius of curvature by the third curvature deformation Rc toward the turning direction Dt of the swirling flow Fa. The third radius of curvature Rc is set to be substantially the same as the radius of curvature 58a (see FIG. 1) of the curved surface portion 58 provided at a position symmetrical to the third constant section 68 in the left-right direction.

  As shown in FIG. 5, the increasing section 62 is an upper guiding section provided on a washing water path 70 (see FIG. 1) from the water discharging section 42 to one end 16 b (front end) of the toilet bowl 16 in the front-rear direction X. 72. The washing water path 70 here is a path along which the washing water discharged from the water discharging section 42 travels inside the toilet bowl section 16. The upper guide portion 72 guides at least a portion of the wash water discharged from the water discharge portion 42 upward, as described in detail later.

  The increase section 62 constitutes an inward guiding section 74 provided on the side surface section 22R of the toilet bowl section 16. As will be described in detail later, the inward guiding portion 74 guides a portion of the washing water that has collided with itself to the radial inside.

  At least a part of the increase section 62 of the present embodiment is provided at a position that intersects the center line Ld of the water outlet 44 extending from the water outlet 44 on the inner side of the opening 32 and outside the water outlet 44 in plan view. . In the increased section 62 of the present embodiment, the turning direction Dt is opposite to the circumferential direction with respect to one surface portion 22X (front surface portion 22F) of the toilet bowl portion 16 of the pair of side surface portions 22R and 22L of the toilet bowl portion 16. It is provided on the side surface 22R of the toilet bowl 16 adjacent to the side (clockwise direction). The increase section 62 is provided in the vicinity of the water outlet 44 on the downstream side of the water outlet 44 of the water discharge part 42. Here, “near” means a range within 20 mm from the water outlet 44. The conditions described here are also satisfied by the above-described upper guiding section 72 and inner guiding section 74.

  A cleaning method using the above toilet device 12 will be described. The toilet device 12 of the present embodiment discharges waste by a flush-type washing method in which the waste is flushed using a head of water. The cleaning water supply device 14 supplies a predetermined amount of cleaning water to the water discharging unit 42 when a predetermined cleaning start condition is satisfied. The cleaning start condition is, for example, that the cleaning water supply device 14 receives a cleaning start operation by an operation member such as a lever or an electric device such as a remote controller or a smartphone.

  FIG. 9 is a diagram showing how the washing water flows. In this drawing, the flow direction of the cleaning water is indicated by an arrow. The water discharging section 42 discharges the cleaning water supplied from the cleaning water supply device 14 into the toilet bowl section 16. The washing water spouted from the water spouting section 42 forms a swirling flow Fa swirling in the toilet bowl section 16. The swirling flow Fa is formed so as to go forward on the right side portion 22R via the front surface portion 22F, the left side surface portion 22L, and the rear surface portion 22B of the toilet bowl portion 16. The swirling flow Fa is formed so as to travel along the shelf surface 50 when passing through the side surface portions 22R and 22L of the toilet bowl portion 16 and the rear surface portion 22B. The swirling flow Fa is formed as a main flow. The “main stream” in the present specification refers to a streak-like flow that flows in a state where a part of the washing water is partially collected. A part of the washing water forming the swirling flow Fa is gradually divided into a split flow Fb while turning in the toilet bowl 16, and the split flow Fb flows down toward the bottom of the toilet bowl 16.

  The water flows Fb and Fg (the water flow Fg will be described later) heading toward the bottom of the toilet bowl 16 have a flow that pushes dirt into the inlet 18 a of the toilet drainage channel 18. The wastewater in the toilet bowl 16 is discharged through the toilet drainage channel 18 by such water flows Fb and Fg.

  Please refer to FIG. The jet water outlet 41 discharges the wash water supplied from the wash water supply device 14 toward the downstream side in the toilet drainage channel 13. The jet water outlet 41 of the present embodiment discharges the flush water while the flush water is flowing toward the downstream side in the toilet drainage channel 18. The flush water spouted from the jet spout 41 amplifies the flow of the water flowing downstream in the toilet drainage channel 18.

  FIG. 10 and FIG. 11 are diagrams schematically showing how the washing water flows. 10 is a view of the toilet 10 as viewed from the upper left rear, and FIG. 11 is a cross-sectional view of a part of the toilet 10 as viewed from the left. In FIG. 10, for convenience of description, a line Lc ′ is attached to a place where the left and right center line Lc in FIG. 1 passes. Also, in FIG. 10, a line Le is attached to the upper side of the area where the washing water reaches in the process of traveling along the inner peripheral surface of the rim portion 26.

  At least a part of the wash water discharged from the water discharge part 42 is guided upward by the collision with the upper guide part 72 (the increased section 62 of the water guide channel 48) to form the first guided flow Fc. As described above, the upper guide portion 72 (the increased section 62 of the water conduit 48) guides at least a portion of the wash water upward without using centrifugal force. The first induced flow Fc is formed as a part of the swirl flow Fa described above. The first induced flow Fc of the present embodiment is jumped away from the waste receiving surface 24 by being guided by the increasing section 62. The first induced flow Fc is formed so as to flow upward along the inner peripheral surface of the rim portion 26 and then flow downward due to its own weight on the above-described cleaning water path 70 while traveling in the turning direction Dt. The first induced flow Fc of the present embodiment is formed so as to reach the highest point Ph outside the opening 32 in the aforementioned washing water path 70.

  A part of the washing water spouted from the water spouting section 42 collides with the inner guide section 74 (the increased section 62 of the water guide channel 48) and is diffused, and is guided to the radial inside of the toilet bowl section 16, and the second washing water is discharged. Two induced flows Fd are formed. The second induced flow Fd is formed so as to flow down from the shelf surface 50 to the concave curved surface portion 56. The second induced flow Fd merges with the swirl flow Fa formed in the toilet bowl 16. These converging points Sa (see also FIG. 9) are radially inward from the inner peripheral surface of the rim portion 26 in a plan view, that is, there are no overhanging surfaces.

  A part of the washing water discharged from the water discharging part 42 flows straight without being guided upward or radially inward by the increasing section 62 (the upper guiding part 72 and the inner guiding part 74) of the water conduit 48. To form The straight flow Fe is formed as a part of the swirl flow Fa described above. In the present embodiment, a part of the washing water discharged from the water discharging part 42 forms the first induced flow Fc, a part of the washing water forms the second induced flow Fd, and the remaining part of the washing water flows straight. Form Fe. The straight flow Fe is transmitted in the turning direction Dt on the inner peripheral surface of the rim portion 26 on the above-described cleaning water path 70.

  The first induction flow Fc and the straight flow Fe flow toward the one end 16b (front end) of the toilet bowl 16 on the washing water path 70 described above. In the course of flowing through this path, the straight flow Fe tends to flow upward due to the upward velocity component given centrifugal force. In the process of flowing downward, the first induced flow Fc merges with the other water flow (straight flow Fe) that is going to flow upward, so as to prevent the upward flow. The first induced flow Fc cancels at least a part of the upward velocity component of the straight flow Fe by merging with the straight flow Fe. At least a part of these merging points is on the aforementioned washing water path 70. The first induced flow Fe flows upward due to centrifugal force while traveling along one surface portion 22X (front surface portion 22F) together with the other water flow while merging with the other water flow (straight flow Fe). After that, the first induced flow Fe flows downward from the one end 16b of the toilet bowl 16 in the front-rear direction X in the turning direction Dt together with the other combined water flow, is received by the shelf 50, and is received by the shelf 50. 50 on the turning direction Dt.

  The washing water forming the first induced flow Fc or the straight flow Fe is swirled in the toilet bowl 16 as a part of the swirl flow Fa, and then directed to the right side surface 22R of the toilet bowl 16 forward. Flows. The above-described second induced flow Fd merges with the swirling flow Fa flowing forward on the right side surface portion 22R of the toilet bowl portion 16 as described above. As described above, the swirling flow Fa that merges with the second induced flow Fd forms a part of the washing water that has flowed without being guided radially inward by the inner guiding portion 74. The second induced flow Fd that has merged with the swirling flow Fa is formed on the one surface portion 22X (front surface portion 22F) of the toilet bowl portion 16 of the front surface portion 22F and the rear surface portion 22B of the toilet bowl portion 16 by the surface of the waste receiving surface 24. A water flow Fg that flows down toward the pool portion 28 of the toilet bowl portion 16 while passing through a portion 56a of the concave curved surface portion 56 below the shelf surface 50 is formed (see also FIG. 9).

  The toilet 10 of the present embodiment is configured so that the above-described flow of the wash water is formed. In such a configuration, the shape of the toilet bowl 16 of the toilet bowl 10, the flow rate of the wash water spouted from the water spouting section 42, the direction in which the wash water is spouted, and the like are determined. The flow rate of the washing water is determined, for example, according to the cross-sectional shape of the water outlet 44 and the water passage 46 of the water discharging unit 42. In the present embodiment, the “shape of the toilet bowl 16” includes the above-described increased section 62 (the upper guide 72 and the inner guide 74) of the water conduit 48 in the present embodiment.

  The effects of the above toilet bowl 10 will be described. The toilet 10 includes an upper guide portion 72 that guides the wash water upward. Therefore, on the above-mentioned washing water path 70, it is possible to form the first induced flow Fc that is guided upward by the upper guide portion 72 and then directed downward by its own weight. For this reason, the upward velocity component of the water flow that travels through the one surface portion 22X (the front surface portion 22F) of the toilet bowl portion 16 can be reduced as compared with the case where the first induced flow Fc is not formed. Along with this, it is possible to suppress the flushing of the cleaning water from the one surface portion 22X (the front surface portion 22F).

  The first induced flow Fc merges with another water flow (straight flow Fe) in the process of flowing downward, and flows upward due to centrifugal force in the process of traveling along one surface portion 22X (front surface portion F) together with the other water flow. Therefore, the washing range of the one surface portion 22X can be widened in the vertical direction as compared with the case where the first induced flow Fc does not flow upward while merging with another water flow.

  The washing water guided by the inner guiding portion 74 merges with the swirling flow Fa formed in the toilet bowl portion 16 on the radial inner side of the inner peripheral surface of the rim portion 26 in plan view. Therefore, the washing water guided by the inner guiding portion 74 and the swirling flow Fa join to amplify the water force, so that the cleaning ability of the toilet bowl portion 16 can be increased.

  Since the inner guiding portion 74 guides a part of the washing water radially inward, the flow rate of the washing water (second induced flow Fd) which merges with the swirling flow Fa is compared with the case where all the washing water is induced. Can be reduced, and the splash generated by the merging with the swirling flow Fa can be suppressed. Therefore, even if the washing water guided by the inner guiding portion 74 and the swirl flow Fa merge at a portion where the overhang surface is not formed, the splash of the splash to the outside of the toilet bowl portion 16 can be suppressed.

  The swirling flow Fa which merges with the second induction flow Fd formed by the inner guiding portion 74 is formed by a part of the washing water discharged from the water discharging portion 42. Therefore, it is not necessary to provide another water discharging section 42 in order to form the swirling flow Fa. Along with this, the number of water discharge portions 42 required for the toilet bowl 10 can be reduced, and accordingly, good design can be obtained.

  The inward guiding section 74 is provided near the water outlet 44 on the downstream side of the water outlet 44 of the water outlet 42. Therefore, as compared with the case where the inward guiding portion 74 is provided at a location downstream of the water outlet 44 and farther from the water outlet 44, the confluence of the second induced flow Fd and the swirl flow Fa is brought closer to the water outlet 44, and The swirling distance of the swirling flow Fa in the toilet bowl 16 until the swirling flow Fa merges with the second induced flow Fd can be shortened. On the other hand, when the flow rate of the washing water supplied into the toilet bowl 16 is small, the swirling flow Fa is increased as the junction of the second induced flow Fd and the swirling flow Fa moves away from the water discharge port 44 in the swirling direction Dt of the swirling flow Fa. Is weakened, and a region that cannot be sufficiently cleaned by the cleaning water is likely to be generated. In this regard, according to the present embodiment, even when the flow rate of the washing water is small, a wide range in the toilet bowl 16 can be washed.

(A) The water spouting section 42 spouts flush water into the toilet bowl 16 through the opening 32 formed in the side surface 22R of the toilet bowl 16. Therefore, compared to the case where the opening 32 is formed in the rear surface portion 22B of the toilet bowl portion 16, when the toilet bowl 10 is viewed from the front side, it is difficult to visually recognize the opening portion 32, and a good design property can be obtained. . Further, compared with the case where the opening 32 is formed in the rear surface portion 22B of the toilet bowl portion 16, the opening portion 32 can be easily accessed from the front side of the toilet bowl 10, and good cleaning properties can be obtained.

  Means for forming the opening 32 in the front surface portion 22F and the rear surface portion 22B of the toilet bowl 16 in order to suppress the flushing of the washing water may be considered. Thus, the swirling distance of the swirling flow Fa from the water discharging section 42 to the one surface portion 22A can be increased, and the water force of the swirling flow Fa is weakened, so that the washing water can be prevented from jumping out. According to the present embodiment, jumping out of the cleaning water can be suppressed without employing such means.

  On the inner peripheral surface of the rim portion 26, a continuous surface 40 having no overhang surface is provided on one surface portion 22X (front surface portion 22F). Therefore, even if one surface portion 22X does not have an overhang surface, it is possible to suppress the washing water from flowing along the continuous surface 40.

  A continuous surface 40 is provided on the inner peripheral surface of the rim portion 26 at a location other than the opening portion 32 over the entire circumference of the toilet bowl portion 16. Therefore, an overhang surface that is hard to reach by wiping and cleaning is not provided in a wide range in the circumferential direction of the toilet bowl portion 16, so that the inner peripheral surface of the rim portion 26 is easily wiped.

  The upper guide portion 72 is formed by an increased section 62 of the curved surface portion 58 of the water conduit 48. Therefore, the upper guide portion 72 can be configured without forming irregularities in a wide area on the bottom surface (shelf surface 50) of the water conduit 48, and a good design property can be obtained.

  The inner guiding portion 74 is formed by an increased section 62 of the curved surface portion 58 of the water conduit 48. Therefore, the inward guiding portion 74 can be configured without forming irregularities in a wide area on the bottom surface (shelf surface 50) of the water conduit 48, and a good design property can be obtained.

  The curved surface portion 58 has a decreasing section 66 provided in the turning direction Dt of the swirling flow Fa from the increasing section 62. Therefore, another section (third constant section 68) that is provided in the turning direction Dt from the increasing section 62 and has a smaller radius of curvature than the maximum radius of curvature of the increasing section 62 and the increasing section 62 are smoothly connected via the decreasing section 66. Can be Accordingly, when the curved section 58 of the headrace channel 48 has the increased section 62, no noticeable step surface is formed between the increased section 62 and the other sections, and good design properties can be obtained.

  The curved surface section 58 has a second constant section 64 connecting the increasing section 62 and the decreasing section 66. Therefore, a prominent convex portion is not formed by the increasing section 62 and the decreasing section 66, and a good design property can be obtained.

  Next, other features will be described. Please refer to FIG. A first curvature change point 30a serving as a boundary between the front region 30F and the middle region 30S, and a second curvature change point 30b serving as a boundary between the rear region 30B and the middle region 30S are provided on the inner peripheral surface of the rim portion 26. Can be

  Please refer to FIG. The highest point Ph of the first induced flow Fc is defined by a region (front region 30F) provided on one surface portion 22X (front region 22F) of the toilet bowl portion 16 of the front region 30F and the rear region B of the rim portion 26. , Is preferably provided near the curvature changing point 30a at the boundary of the intermediate region 30S. Specifically, the highest point Ph of the first induced flow Fc is 30 mm upstream in the front-rear direction X (rear side in the front-rear direction X in this example) from the curvature changing point 30a and downstream in the front-rear direction X from the curvature change point 30a in plan view ( In the present example, it is more preferable that the distance be within a range of 15 mm on the front side in the front-rear direction X). This is set based on the inventor's experimental findings. Thus, the first induced flow Fc can easily flow downward before starting to receive a large centrifugal force by traveling through the region 30F having a small radius of curvature. Along with this, it becomes easy to merge with the straight flow Fe with a strong downward momentum, and the washing water forming the straight flow Fe and the first induced flow Fc is flush with the one surface portion 22X of the toilet bowl portion 16 (front surface portion 22F). When flowing through, water can be effectively prevented from jumping out.

  As shown in FIGS. 6 to 8, the toilet bowl 16 is provided with an overhang surface 76 on the back side of the opening 32 and outside the water outlet 44. The overhang surface 76 forms the upper edge of the opening 32. The overhang surface 76 is provided on the inner peripheral surface of the rim portion 26 so as to extend radially inward on the way to the upper side. The overhang surface 76 is provided in a part of the above-described cleaning water path 70 in a part of the turning direction Dt from the water discharging part 42. In the toilet bowl portion 16 of the present embodiment, the overhang surface 76 is provided only on the inner side of the opening 32, and the overhang surface 76 is not provided outside.

  The overhang surface 76 is inclined with respect to the horizontal plane so as to continuously extend upward from the water discharging section 42 toward the turning direction Dt. The overhang surface 76 is formed such that its diameter decreases as it goes from the water discharging part 42 to the turning direction Dt. The overhang surface 76 is provided at a position where the overhang surface 76 comes into contact with the first guide flow Fc formed by the upper guide portion 72 from above.

  As a result, even if the supply amount of the cleaning water from the cleaning water supply device 14 suddenly increases, and the cleaning water is going to rise significantly by the upper guide portion 72, the rising of the cleaning water can be restricted by the overhang surface 76. . Accordingly, it is possible to avoid a situation in which the washing water jumps out of the toilet bowl portion 16. In addition, there is an advantage that the overhang surface 76 can be washed with the washing water guided upward by the upper guiding portion 72.

  On the inner peripheral surface of the rim 26 of the present embodiment, an opening 32 is formed, and an upper surface 78 provided above the opening 32 is provided. The upper surface portion 78 is continuous from the upper end inner edge portion 16a of the toilet bowl portion 16 to the upper edge portion of the opening portion 32 without forming an overhang surface. The upper surface portion 78 is smoothly connected to a portion 26a of the inner peripheral surface of the rim portion 26 adjacent to the upper surface portion 78 on both sides in the circumferential direction. Here, the term “smoothly connected” means that the two objects referred to are connected without forming irregularities.

  Please refer to FIG. On the bottom surface 42 a of the water discharge section 42, a gradient is formed, which falls downward toward the water discharge port 44 in a range from the back side to the water discharge port 44 with respect to the water discharge port 44. This makes it difficult for residual water to accumulate inside the water discharge part 42, and good hygiene can be obtained.

(Second device)
FIG. 12 is a sectional view taken along the line EE of FIG. 1, and FIG. 13 is a sectional view taken along the line FF of FIG. As shown in FIG. 2 to FIG. 4, FIG. 12, and FIG. 13, the inner peripheral surface of the rim portion 26 has a first surface region 90 provided on the side surface portions 22 </ b> R and 22 </ b> L of the toilet bowl portion 16. It has second surface regions 92 and 94 provided on at least one of the front surface portion 22F and the rear surface portion 22B. The inclination angle θb of the second surface regions 92 and 4 with respect to the vertical plane Pv is gentler than the inclination angle θa of the first surface region 90 with respect to the vertical surface Pv. Here, the inclination angle with respect to the vertical plane Pv refers to an acute inclination angle with respect to the vertical plane Pv in a vertical section passing through the center Cp of the toilet bowl portion 16. Hereinafter, for convenience of explanation, the first surface region 90 is referred to as a steep slope region 90, and the second surface regions 92 and 94 are referred to as gentle slope regions 92 and 94.

  In the gentle slope regions 92 and 94, a front gentle slope region 92 (one-side gentle slope region) provided on the front portion 22F which is one of the front surface portion 22F and the rear surface portion 22B of the toilet bowl portion 16; A rear gentle slope area 94 (the other gentle slope area) provided on the rear face part 22B which is the other face part of them is included.

  The steep slope region 90 is provided in a circumferential range including an intermediate portion of the toilet bowl 16 in the front-rear direction X. The front gentle slope area 92 is provided in the circumferential range including one end 16b (front end) of the toilet bowl 16, and the rear gentle slope area 94 is the other end 16 c of the toilet bowl 16 in the front-rear direction X ( (Rear end). The gentle front slope region 92 is provided at least in most of the front surface portion 22F of the toilet bowl portion 16, and the rear gentle slope region 94 is provided in at least most of the rear surface portion 22B of the toilet bowl portion 16. The front gentle slope area 92 of the present embodiment is provided over the entire front surface 22 </ b> F of the toilet bowl 16.

  A front boundary portion 96 which is a boundary between the steep slope region 90 and the front gentle slope region 92 is, in a side view, one of the front surface portion 22F and the side surface portions 22R and 22L of the toilet bowl portion 16 and an end near the boundary. Is provided. The front boundary portion 96 of the present embodiment is provided at an end of the side surface portions 22R and 22L near the front surface portion 22F.

  A rear boundary portion 98 which is a boundary between the steep slope region 90 and the rear gentle slope region 94 is closer to the boundary in one of the side surfaces 22R and 22L and the rear surface 22B of the toilet bowl 16 in side view. It is provided at the end. The rear boundary portion 98 of the present embodiment is provided at an end near the side surfaces 22R and 22L of the rear surface 22B.

  The above-mentioned opening 32 is formed in the steep slope region 90. Specifically, the opening 32 is formed in the steep slope region 90 provided in the right side surface 22R of the toilet bowl portion 16, and the opening 32 is not formed in the steep slope region 90 provided in the left side surface 22L. The openings 32 are not formed in the gentle slope areas 92 and 94.

  As shown in FIG. 12, the front gentle slope region 92 is formed between a first most inclined portion 92 a provided at one end 16 b (front end) of the toilet bowl 16, and the first most inclined portion 92 a and the front boundary portion 96. And a first angle changing portion 92b provided at the first position. The first inclination portion 92a has the largest inclination angle in the front gentle slope region 92, and has a substantially constant inclination angle over the entire circumferential range. As the first angle changing portion 92b approaches the one end portion 16b (front end portion) of the toilet bowl portion 16 from the front boundary portion 96, the inclination angle continuously changes so as to approach the inclination angle of the first most inclined portion 92a. .

  As shown in FIG. 13, the rear gentle slope area 94 includes a second most inclined portion 94a provided at the other end 16c (a rear end) of the toilet bowl portion 16, a second most inclined portion 94a, and a rear side. A second angle changing portion 94b provided between the boundary portions 98. The second most inclined portion 94a has the largest inclination angle in the rear gentle slope region 94, and has a substantially constant inclination angle over the entire circumferential range. The second angle changing portion 94b is continuously inclined such that it approaches the inclination angle of the second most inclined portion 94a as it approaches the other end 16c (rear end) of the toilet bowl portion 16 from the rear boundary portion 98. Changes.

  The continuous surface 40 described above is provided in the steep slope region 90 and the gentle slope regions 92 and 94. In the steep slope region 90 provided on the right side surface portion 22R, the continuous surface 40 is provided in the entire circumferential range at locations other than the opening 32. In the steep slope region 90 and the gentle slope regions 92 and 94 provided in the left side surface portion 22L, the continuous surface 40 is provided in the entire circumferential range.

  In the present embodiment, the steep slope area 90 is constituted by the above-described intermediate area 30S, the front gentle slope area 92 is constituted by the front area 30F, and the rear gentle slope area 94 is constituted by the rear area 30R. The steep slope region 90 has a curved surface with a radius of curvature within the third range R3 in plan view, and the gentle slope regions 92 and 94 have a curved surface with a radius of curvature smaller than the radius of curvature of the third range R3. .

  The effects of the above-described ideas will be described. FIG. 14 is an explanatory diagram of the centrifugal force Fa acting on the cleaning water W. In this drawing, the centrifugal force Fa is divided into a first component force Fa1 along the normal direction of the inner peripheral surface of the rim portion 26 and a second component force Fa2 along the in-plane direction of the inner peripheral surface. .

  The centrifugal force Fa acts on the washing water when flowing along the inner peripheral surface of the rim portion 26. The component of the second component force Fa2 of the centrifugal force Fa (= Fa × sin θ) increases as the inclination angle θ of the inner peripheral surface of the rim portion 26 increases. This means that the larger the inclination angle θ of the inner peripheral surface of the rim portion 26 becomes, the more easily the cleaning water reaches a wider vertical range due to the centrifugal force Fa. Here, the vertical range means a range in the vertical direction Z.

  In the present embodiment, the inclination angle θb of the gentle slope areas 92 and 94 is gentler than the inclination angle θa of the steep slope area 90. Therefore, the centrifugal force is reduced by the gentle slope regions 92 and 94 provided on the front surface 22F or the rear surface 22B of the toilet bowl 16 as compared with the case where the inclination angle is the same between the steep slope region 90 and the gentle slope regions 92 and 94. The received washing water can easily reach a wide vertical range. Along with this, the cleaning range on the continuous surface 40 of the gentle slope regions 92 and 94 can be widened in the vertical direction.

  In order to widen the cleaning range in the vertical direction as described above, other means may be considered to reduce the radius of curvature of the inner peripheral surface of the rim portion 26 in plan view. According to the present embodiment, there is an advantage that the contour of the toilet bowl portion 16 does not need to be largely changed as compared with the case where such means are taken.

  In particular, the range of cleaning on the continuous surface 40 provided on the front surface 22F of the toilet bowl 16 that is easily soiled by urine can be widened. In addition, the range of cleaning on the continuous surface 40 provided on the rear surface portion 22B of the toilet bowl 16 that is difficult to wipe can be widened.

  The water discharging section 42 discharges the washing water into the toilet bowl 16 through the opening 32 formed in the steep slope area 90. Therefore, the opening 32 is less noticeable in a plan view than in the case where the opening 32 is formed in the gentle slope regions 92 and 94, and a good design property can be obtained. In addition, the effect (A) described above can also be obtained.

  Other features will be described. Please refer to FIG. The shelf surface 50 is a gentle front slope region in the turning direction Dt from the front end or the rear end of the toilet bowl portion 16 provided on the front portion 22F (one surface portion 22X) or the rear surface portion 22B (the other surface portion) of the toilet bowl portion 16. 92. More specifically, the shelf surface 50 is connected to the front gentle slope region 92 in the turning direction Dt from the front end of the toilet bowl portion 16 and connected to the rear gentle slope region 94 in the turning direction Dt from the rear end of the toilet bowl portion 16. Is done.

  This makes it easier for the shelf surface 50 to receive the washing water that rises and then descends due to the centrifugal force in the process of passing through the front gentle slope area 92 and the rear gentle slope area 94. Along with this, much of the washing water that has passed through the front gentle slope area 92 and the rear gentle slope area 94 can be made to reach farther through the water conduit 48.

  The shelf surface 50 is connected to the front gentle slope region 92 on the front surface 22F of the toilet bowl portion 16 on the side opposite to the swirling direction Fa of the swirling flow Fa from the front end of the toilet bowl portion 16. Further, the shelf surface 50 is connected to the rear gentle slope region 94 in the entire rear surface portion 22B of the toilet bowl portion 16.

  Part of the concave curved surface portion 56 of the waste receiving surface 24 is provided on the front surface portion 22F of the toilet bowl portion 16. The concave curved surface portion 56 is continuous from the lower end edge 24b of the waste receiving surface 24 to the outer peripheral end 24a of the waste receiving surface 24 at least in the left and right central portions 16d of the toilet bowl portion 16. The concave curved surface portion 56 is continuous with the front gentle slope region 92 without the intervention of the shelf surface 50 in the left and right central portions 16 d of the toilet bowl portion 16. It can be understood that the shelf surface 50 is not provided at the left and right central portions 16d of the toilet bowl portion 16 at the front surface portion 22F of the toilet bowl portion 16.

  On the other hand, when the inner peripheral end 50a (convex curved surface 52) of the convex curved shelf surface 50 is provided at the left and right central portion 16d on the front surface portion 22F of the toilet bowl portion 16, urination occurs on the inner peripheral end 50a. Drops tend to occur when hit. In this regard, according to the present embodiment, the inner peripheral end of the convex curved shelf surface 50 is not provided in the left and right central portions 16d, so that it is possible to suppress the splash of urine.

  Please refer to FIG. The toilet bowl portion 16 is provided at a substantially symmetrical position in a range excluding the above-described opening portion 32 and the deep portion of the opening portion 32. It can be understood that the waste receiving surface 24 is provided at substantially symmetrical positions in a range from the inner peripheral end 50a of the shelf surface 50 to the lower end edge 24b of the waste receiving surface 24. Further, it can be understood that the inner peripheral end 50a of the shelf surface 50 is provided at a substantially symmetrical position. In addition, it can be considered that the inner peripheral surface of the rim portion 26 is provided at a substantially symmetrical position in a range excluding the opening 32 described above.

  The location of the toilet 10 that becomes an edge is easily visually recognized. In the present embodiment, the inner peripheral end 50a of the shelf surface 50 serving as such an edge is provided at a symmetrical position. Therefore, when the shape of the shelf surface 50 or the like becomes asymmetrical on the left and right due to a manufacturing error or the like, it becomes easy to visually determine that, and the inspection work can be facilitated.

(Second embodiment)
Drawing 15 is a side sectional view showing a part of toilet bowl 10 of a 2nd embodiment. In the toilet 10 of the first embodiment, the front gentle slope area 92 and the rear gentle slope area 94 have substantially the same inclination angle θb. On the other hand, in the toilet bowl 10 of the present embodiment, the front gentle slope area 92 and the rear gentle slope area 94 have different inclination angles θb. Specifically, the inclination angle θb of the gentle rear slope region 94 with respect to the vertical plane is smaller than that of the front gentle slope region 92. In the present embodiment, the inclination angle of the second gentlest slope region 94a in the entire rear gentle slope region 94 is gentler than the inclination angle of the first gentlest portion 92a in the front gentle slope region 92. The reason will be described.

  As described above, the swirling flow formed by the cleaning water discharged from the water discharging section 42 passes through the front gentle slope area 92 (one side second face area) and then to the rear gentle slope area 94 (the other second face area). Via). For this reason, when passing through the gentle rear slope area 94, the swirling flow has a weaker water force than when passing through the front gentle slope area 92, and it is difficult to reach a wide vertical range due to centrifugal force.

(B) In this respect, according to the present embodiment, even when the swirling flow of the weak water force passes through the rear gentle slope area 94, the washing water can easily reach the wide vertical area of the rear gentle slope area 94. In particular, in order to achieve such an object, it is not necessary to increase the flow rate of the cleaning water discharged from the water discharging section 42, and it is possible to avoid a situation in which the cleaning water jumps out of the front gentle slope area 92 due to the increase in the flow rate.

  The present invention has been described based on the embodiments. Next, modified examples of each component will be described.

  The toilet bowl device 12 may be cleaned using a cleaning method other than the flush type. This cleaning method is, for example, a siphon method.

  The opening 32 of the toilet bowl 16 may be formed in the front surface 22F or the rear surface 22B in addition to the side surfaces 22R and 22L. The opening 32 may be formed in the gentle slope areas 92 and 94 in addition to the steep slope area 90. A plurality of openings 32 may be formed in the toilet bowl 16.

  The shelf surface 50 and the like of the toilet bowl section 16 do not have to be provided at substantially symmetrical positions.

  An overhang surface may be formed on the inner peripheral surface of the rim portion 26 over the entire circumference. On the inner peripheral surface of the rim portion 26, the inclination angle may be substantially the same at a portion over the entire circumference of the toilet bowl portion 16.

  The continuous surface 40 only needs to have the above-mentioned overhang surface. If this condition is satisfied, the continuous surface 40 may be provided at least partially so as to gradually extend radially outward from the upper end inner edge portion 16a of the toilet bowl portion 16 downward.

  Although the example in which the water outlet 44 of the water discharge part 42 is formed on the back side of the opening 32 of the rim 26 has been described, the opening 32 may constitute the water discharge port 44. In this case, the inner peripheral surface of the rim portion 26 may not have the overhang surface 76. The swirling direction Dt of the swirling flow Fa formed by the water discharger 42 may be clockwise.

  One end portion 16b in the front-rear direction X of the toilet bowl 16 through which the swirling flow Fa formed by the water discharging portion 42 passes first is defined as the rear end of the toilet bowl 16, and the swirling flow Fa passes through the toilet bowl later. The other end 16 c of the toilet bowl 16 may be the front end of the toilet bowl 16. In this case, one surface portion 22X on which the one end portion 16b of the toilet bowl portion 16 is provided becomes a rear surface portion 22B of the toilet bowl portion 16, and the other surface portion on which the other end portion 16c of the toilet bowl portion 16 is provided is the other surface portion of the toilet bowl portion 16. It becomes the front face 22F.

  As in the embodiment, one end of the toilet bowl 16 through which the swirling flow Fa passes first is the front end of the toilet bowl 16, and one surface 22X on which the one end of the toilet bowl 16 is provided is the toilet bowl. Consider the case of the front portion 22F of the portion 16. In this case, for example, the water spouting portion 42 is provided on the side surface portion 22R adjacent to the front surface portion 22F (one surface portion 22X) of the toilet bowl portion 16 on the side opposite to the circumferential direction with respect to the turning direction Dt, or on the side surface portion 22R. What is necessary is just to be provided in the adjacent rear surface part 22B.

  One end of the toilet bowl 16 through which the swirling flow Fa passes first is the rear end of the toilet bowl 16, and one surface 22X on which one end of the toilet bowl 16 is provided is the rear surface of the toilet bowl 16. Consider the case of 22B. In this case, for example, the water spouting portion 42 is formed on the side surface portion 22L adjacent to the rear surface portion 22B (one surface portion 22X) of the toilet bowl portion 16 on the side opposite to the turning direction Dt in the circumferential direction or the side surface portion 22L. What is necessary is just to be provided in the adjacent front surface part 22F.

(First ingenuity)
The example in which the upward guiding section 72 is configured by the increasing section 62 of the headrace channel 48 has been described, but a specific example thereof is not particularly limited. The upper guide portion 72 may be, for example, a convex portion formed on the bottom surface of the water passage 46 of the water discharge portion 42 or the shelf surface 50 of the water passage 48. In addition, an inclined surface formed on them and having an upward slope in the turning direction Dt may be used.

  Although the example in which the upper guide unit 72 guides a part of the wash water discharged from the water discharge unit 42 upward has been described, the whole may be guided upward.

  The example in which the inner guiding portion 74 is configured by the increasing section 62 of the water conduit 48 has been described, but a specific example thereof is not particularly limited. The inner guiding portion 74 may be, for example, a convex portion formed on the shelf surface 50 of the water conduit 48.

  The upper guide portion 72 and the inner guide portion 74 may be provided at a location different from the vicinity of the water outlet 44.

  Each of the upper guide portion 72 and the inner guide portion 74 has been described as an example in which the same portion (increase section 62) of the water conduit 48 is configured. However, separate portions may be configured, or one of them is not provided. May be.

  Although the example in which the increased section 62 of the water conduit 48 is formed outside the water discharge section 42 has been described, it may be formed inside the water discharge section 42.

  The increased section 62 of the headrace 48 and the other section 68 may be connected via a step surface without passing through the reduced section 66.

  Although the flush toilet 10 has been described as being configured to form the above-described first induced flow Fc and including the upper guide portion 72, the flush toilet 10 may not include the upper guide portion 72.

(Second device)
Although the first surface region 90 has been described as an example in which the steeply inclined surface region is inclined with respect to the vertical surface, a vertical surface region substantially parallel to the vertical surface may be included.

  The gentle slope regions 92 and 94 may be provided only on one of the front surface portion 22F and the rear surface portion 22B of the toilet bowl portion 16.

  It is assumed that the swirling flow Fa passes through the gentle rear slope area 94 and then passes through the gentle front slope area 92. In this case, in order to obtain the above-described effect (B), it is only necessary that the inclination angle θb of the front gentle slope area 92 is gentler than that of the rear gentle slope area 94.

  The example in which the first surface region 90 is provided on the side surface 22R of the toilet bowl 16 and the second surface regions 92 and 94 are provided on the front surface 22F and the rear surface 22B of the toilet bowl 16 has been described. In addition, in plan view, the first surface region 90 has a curved surface with a radius of curvature within the third range, and the second surface regions 92 and 94 have a curved surface with a radius of curvature smaller than the radius of curvature of the third range. These may be provided at positions irrelevant to the front part 22 of the toilet bowl part 16 and the like. This is because, for example, in plan view, the inner peripheral surface of the rim portion 26 has a rectangular shape, and four sides of the rectangle are curved first surface regions 90, and corners of the four sides are curved surfaces. Are assumed to be the second surface regions 92 and 94.

  The embodiment and the modification of the present invention have been described above in detail. Each of the above-described embodiments and modified examples is merely a specific example for implementing the present invention. The contents of the embodiments and the modified examples do not limit the technical scope of the present invention, and many design changes such as change, addition, and deletion of constituent elements are possible without departing from the spirit of the invention. In the above-described embodiment, the contents that can be changed in design are emphasized by notation such as “of the embodiment” and “in the embodiment”. Changes are allowed. Any combination of the above components is also effective as an aspect of the present invention. The hatching attached to the cross section of the drawing does not limit the material to which hatching is applied.

  When the invention embodied by the above embodiments and modifications is generalized, the following technical ideas are derived. Hereinafter, the present invention will be described using embodiments described in the problem to be solved.

  In the flush toilet of the second aspect, in the first aspect, the wash water guided upward by the upper guide portion may form an induced flow that flows upward on the wash water path and then flows downward. Good.

  The flush toilet according to the third aspect is the flush toilet according to the second aspect, wherein the induced flow is combined with another water flow in a process of flowing downward, while being centrifugal in a process of traveling along the one surface with the combined other water flow. It may flow upward. According to this aspect, the washing range on one surface can be widened in the vertical direction as compared with the case where the induced flow does not flow upward while merging with another water flow.

  A flush toilet according to a fourth aspect is the flush toilet according to the first to third aspects, in which the inner peripheral surface of the rim portion includes, on the one surface portion, an outer peripheral end of an upper end inner edge of the toilet bowl portion and an outer peripheral end of the waste receiving surface A continuous surface that is continuous without forming an overhang surface may be provided. According to this aspect, even if there is no overhang surface on one surface portion, it is possible to suppress the splashing of the cleaning water along the continuous surface.

  A flush toilet according to a fifth aspect is the flush toilet according to any one of the first to fourth aspects, wherein the water spouting section spouts flush water into the toilet bowl through an opening formed in a side surface of the toilet bowl. Good. According to this aspect, as compared with the case where the opening is formed in the rear surface of the toilet bowl, the opening is easily accessible from the front side of the flush toilet, and good cleaning properties can be obtained.

  In the flush toilet according to a sixth aspect, in the fifth aspect, an overhang surface is formed on an inner peripheral surface of the rim portion from an inner edge of an upper end of the toilet bowl to an outer peripheral end of the waste receiving surface. A continuous surface may be provided without being continuous, and the continuous surface may be provided on the inner peripheral surface of the rim portion in a range other than the opening portion over the entire circumference of the toilet bowl portion. According to this aspect, since the overhang surface that is hard to reach by wiping and cleaning is not provided in a wide range in the circumferential direction of the toilet bowl portion, the inner peripheral surface of the rim portion is easily wiped.

  A flush toilet according to a seventh aspect is the flush toilet according to any one of the first to sixth aspects, further comprising a headrace for guiding the wash water in a swirling direction of the swirling flow, wherein the headrace is located at a lower inner corner of the headrace. The curved surface portion may have an increasing section in which a radius of curvature increases continuously toward the turning direction, and the upward guiding section may be configured by the increasing section. . According to this aspect, the upper guide portion can be configured without forming irregularities over a wide area on the bottom surface of the water channel, and a good design property can be obtained.

  In the flush toilet according to an eighth aspect, in the seventh aspect, in the seventh aspect, the curved surface portion has a decreasing section provided in the turning direction from the increasing section, and a radius of curvature decreases continuously as moving toward the turning direction. Is also good. According to this aspect, when there is an increased section in the curved surface portion of the headrace channel, a step surface that is conspicuous between the increased section and another section having a smaller radius of curvature provided in the turning direction than the increased section is not formed, Good design properties can be obtained.

  The flush toilet according to the ninth aspect may be provided with the overhang surface in any of the first to eighth aspects, wherein the overhang surface comes into contact with the washing water guided upward by the upper guiding portion from above. According to this aspect, even when the supply amount of the cleaning water from the cleaning water supply device is rapidly increased and the cleaning water is going to rise significantly by the upper guiding portion, the rising of the cleaning water can be regulated by the overhang surface. .

Reference Signs List 10: flush toilet, 16: toilet bowl, 16a: upper inner edge, 16b: one end, 16d: left and right center, 22B: rear, 22F: front, 22L: left side, 22R: right side, 22X .., One surface, 24... Filth receiving surface, 24a... Outer peripheral end, 24b... Lower edge, 26... Rim, 32... Headrace channel, 50 ... shelf surface, 50a ... inner peripheral end portion, 56 ... concave curved surface portion, 58 ... curved surface portion, 62 ... increasing section, 66 ... decreasing section, 70 ... washing water path, 72 ... upper guide section, 74 ... Inward guiding portion, 76: overhang surface, 90: first surface region, 92, 94: second surface region.

Claims (10)

A toilet bowl portion having a pot-like waste receiving surface,
A rim portion forming an upper end side portion of the toilet bowl portion,
A spouting section that forms a swirling flow by spouting washing water into the toilet bowl section,
One end portion of the front and rear portions of the toilet bowl portion is provided with one end in the front-rear direction of the toilet bowl portion,
A flush toilet provided on an washing water path from the water discharging section to the one end, and having an upper guiding section for guiding at least a part of the washing water upward.   2. The flush toilet according to claim 1, wherein the flush water guided upward by the upper guide section forms a guided flow that flows upward and then downward on the flush water path. 3.   3. The flush toilet according to claim 2, wherein the induced flow merges with another water flow in a process of flowing downward, and flows upward by centrifugal force in a process of traveling along the one surface together with the merged other water flow. 4.   On the inner peripheral surface of the rim portion, a continuous surface is provided on the one surface portion, which is continuous without forming an overhang surface from the upper end inner edge portion of the toilet bowl portion to the outer peripheral end portion of the waste receiving surface. A flush toilet according to any one of claims 1 to 3.   The flush toilet according to any one of claims 1 to 4, wherein the water spouting section discharges washing water into the toilet bowl through an opening formed in a side surface of the toilet bowl. An inner peripheral surface of the rim portion is provided with a continuous surface that is continuous without an overhang surface being formed from an upper end inner edge portion of the toilet bowl portion to an outer peripheral end portion of the waste receiving surface,
The flush toilet according to claim 5, wherein the inner peripheral surface of the rim portion is provided with the continuous surface in a range other than the opening portion over an entire circumference of the toilet bowl portion. A water conduit that guides the washing water in a swirling direction of the swirling flow,
The headrace has a curved surface portion forming a lower inner corner of the headrace,
The curved surface portion has an increasing section in which a radius of curvature continuously increases as going in the turning direction,
The flush toilet according to any one of claims 1 to 6, wherein the upward guiding section is configured by the increasing section.   The flush toilet according to claim 7, wherein the curved surface portion is provided in the turning direction from the increasing section, and has a decreasing section in which a radius of curvature decreases continuously as the turning section moves.   The flush toilet according to any one of claims 1 to 8, further comprising an overhang surface that comes into contact with the washing water guided upward by the upper guiding portion from above. A toilet bowl portion having a pot-like waste receiving surface,
A rim portion forming an upper end side portion of the toilet bowl portion,
A flush toilet comprising a spout section that forms a swirling flow by spouting flush water into the toilet bowl section,
One end portion of the front and rear portions of the toilet bowl portion is provided with one end in the front-rear direction of the toilet bowl portion,
The flush toilet, by guiding at least a portion of the wash water upward on the wash water path from the water discharge section to the one end, flows upward on the wash water path and then flows downward. A flush toilet configured to form a guided flow.

Images