CN110820885A - Flush toilet - Google Patents

Abstract

Provided is a technique which can widen the range of flushing of a continuous surface of an edge portion in the vertical direction. Comprising: a toilet bowl section (16) having a bowl-shaped waste receiving surface (24); an edge portion (26) forming the upper end side portion of the toilet bowl portion; a water discharge unit (42) for forming a swirling flow by discharging flush water into the bowl portion; the inner peripheral surface of the edge portion has: a first surface region (90) provided on a side surface section (22R) of the toilet bowl section; second surface regions (92, 94) provided on at least one of the front surface (22F) and the rear surface (22B) of the bidet; the first surface region (90) and the second surface region are respectively provided with a continuous surface (40) which is continuous from the upper end inner edge part of the bedpan part to the outer peripheral end part of the sewage receiving surface without forming a protruding surface, and the inclination angle of the second surface region relative to the vertical surface is gentler than that of the first surface region relative to the vertical surface.

Description

Flush toilet

Technical Field

The present disclosure relates to a flush toilet.

Background

Patent document 1 describes a flush toilet including a bowl portion; a water discharge part which forms the edge part of the upper end side part of the toilet bowl part and forms a revolving flow by discharging the washing water into the toilet bowl part.

Patent document 1: japanese laid-open patent publication No. 2015-1699004

Patent document 2: japanese unexamined patent publication No. 2016 & 041880

In general, the front surface or the rear surface of the bowl portion has a smaller radius of curvature than the side surface of the bowl portion in plan view, and therefore, a large centrifugal force is applied to the flush water flowing along the inner peripheral surface of the rim portion. Therefore, the flush water rising due to the centrifugal force easily flies out of the toilet bowl on the front or rear surface of the toilet bowl. As a countermeasure against this, a method of restricting the flow of flush water by a projection surface formed on the inner peripheral surface of the rim portion is generally adopted (see patent document 1). The present inventors have come to recognize that there is a new technique for achieving this measure.

Disclosure of Invention

Technical problem to be solved by the invention

An object of the present disclosure is to provide a technique capable of suppressing flush water from flying out of a toilet bowl.

Means for solving the problems

In order to solve the above problem, a first aspect of the present disclosure is a flush toilet. A flush toilet in a first aspect includes: the toilet bowl comprises a bowl portion having a bowl-shaped waste receiving surface, an edge portion forming an upper end side portion of the bowl portion, and a drain portion forming a revolving flow by discharging flush water into the bowl portion, wherein one end portion in a front-rear direction of the bowl portion is provided on one of a front surface portion and a rear surface portion of the bowl portion, and the toilet bowl includes an upper guide portion provided on a flush water path from the drain portion to the one end portion and guiding at least a part of the flush water upward.

Another aspect of the present disclosure for solving the above problems is a flush toilet. A flush toilet according to another aspect includes: the flush toilet includes a bowl portion having a bowl-shaped waste receiving surface, an edge portion forming an upper end portion of the bowl portion, and a drain portion forming a swirling flow by discharging flush water into the bowl portion, wherein one of a front surface portion and a rear surface portion of the bowl portion serves as a front-rear end portion of the bowl portion, and at least a part of the flush water is guided upward in a flush water path extending from the drain portion to the one end portion, thereby forming a guide flow which flows upward and then downward in the flush water path.

Drawings

Fig. 1 is an explanatory diagram showing a toilet apparatus according to a first embodiment in combination with a functional block diagram.

Fig. 2 is a sectional view a-a of fig. 1.

Fig. 3 is a sectional view B-B of fig. 1.

Fig. 4 is a plan view of the flush toilet of the first embodiment.

Fig. 5 (a) is a C-C sectional view of fig. 6, and fig. 5 (b) is a D-D sectional view of fig. 6.

Fig. 6 is an enlarged view of a portion of fig. 2.

FIG. 7 (a) to FIG. 7 (c) are sectional views of I-I, II-II, III-III in FIG. 6, respectively.

Fig. 8 (a) and 8 (b) are sectional views IV-IV and V-V in fig. 6, respectively.

Fig. 9 is a diagram illustrating a flow pattern of flush water in the flush toilet of the first embodiment.

Fig. 10 is a rear view of the flush toilet of the first embodiment as viewed from the upper left.

Fig. 11 is a sectional view of a part of the flush toilet of the first embodiment as viewed from the left side.

Fig. 12 is a cross-sectional view E-E of fig. 1.

Fig. 13 is a sectional view F-F of fig. 1.

Fig. 14 is an explanatory diagram of centrifugal force acting on flush water.

Fig. 15 is a side sectional view showing a part of a flush toilet of the second embodiment.

Detailed Description

According to the first aspect, the guide flow can be formed in the flush water path so as to be guided upward by the upper guide portion and then downward by its own weight. Therefore, as compared with the case where such a guide flow is not formed, the velocity component in the upward direction of the water flowing on one face of the bowl portion can be reduced, and the flush water can be prevented from flying off from the one face.

According to the above-described another aspect, as compared with a case where no guide flow is formed on the flush water path, the velocity component in the upward direction of the water flowing on one surface of the bowl portion can be reduced, and the flush water can be prevented from flying off from one surface.

In the following, in the embodiment and the modified examples, the same reference numerals are given to the same components, and redundant description is omitted. In each of the drawings, for convenience of explanation, a part of the constituent elements is appropriately omitted, and the size of the constituent elements is appropriately enlarged or reduced. The drawing is to be viewed in the direction of the symbol.

(first embodiment)

An outline of a toilet apparatus 12 using the flush toilet 10 (hereinafter simply referred to as the toilet 10) of the first embodiment will be described. Fig. 1 is an explanatory diagram showing a toilet bowl apparatus 12 in combination with a functional block diagram. Fig. 1 is also a plan view of the toilet bowl 10. Fig. 2 is a sectional view a-a of fig. 1, and fig. 3 is a sectional view B-B of fig. 1.

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

The toilet apparatus 12 includes a flush water supply device 14 for supplying flush water to the toilet 10 in addition to the toilet 10. The flush water supply device 14 is constituted by a water tank, for example, but may be constituted by a flush valve or the like.

The toilet 10 of the present embodiment is a western-style toilet. The toilet 10 of the present embodiment is made of pottery, but may be made of resin or the like. The toilet bowl 10 has a bowl portion 16; a toilet drain channel 18 connected to the bottom of the toilet bowl portion 16. A recess 20 for housing a part of a mechanical device (not shown) such as a private parts washing device is formed on the upper surface of the toilet 10. The toilet drain path 18 serves as a path for discharging waste and water from the inside of the toilet bowl 16 to the drain-side water path.

The bowl portion 16 has a bowl-shaped waste receiving surface 24 for receiving waste; an edge portion 26 forming an upper end side portion of the bowl portion 16. The inner peripheral surface of the rim 26 is attached to the bowl 16 from the upper end inner edge 16a to the outer peripheral end 24a of the waste receiving surface 24. Hereinafter, the circumferential direction and the radial direction of the bowl portion 16 will be described. The "circumferential direction" refers to a direction around the center Cp of the upper end inner edge portion 16a of the bowl portion 16 in a plan view, and the "radial direction" refers to a direction perpendicular to a vertical line passing through the center Cp.

The bowl portion 16 has a water storage portion 28 recessed downward from a lower end edge portion 24b of the waste receiving surface 24. The water storage portion 28 forms the bottom of the toilet bowl portion 16 and has a bottom shape. Inlet 18a of toilet drain 18 opens at the bottom of water storage unit 28. The water storage unit 28 stores water (not shown) as a part of the seal water.

Fig. 4 is another plan view of the toilet bowl 10. The inner peripheral surface of the edge portion 26 has, in plan view: a front region 30F including a front end, a rear region 30B including a rear end, and a left and right intermediate region 30S connecting the front region 30F and the rear region 30B. In a plan view, the front region 30F is curved with a radius of curvature within the first range R1, and the rear region 30B is curved with a radius of curvature within the second range R2. The intermediate region 30S is curved to have a radius of curvature larger than the radius of curvature in the third range R3 of the first range R1 and the second range R2. For example, the first range R1 is 70mm to 120mm, the second range R2 is 100mm to 130mm, and the third range R3 is 200mm to 530 mm. As described above, the inner peripheral surface of the rim portion 26 is formed in an elliptical shape having a smaller radius of curvature in the front region 30F and the rear region 30B than in the middle region 30S in a plan view. The first range R1 and the second range R2 may have a smaller radius of curvature than the third range R3, and are not limited to the magnitude relationship therebetween.

Hereinafter, the bidet part 16 will be described in 4 parts. Specifically, the bowl portion 16 is divided into a pair of side surface portions 22R and 22L provided on both left and right sides of the bowl portion 16, a front surface portion 22F provided on the front side of the bowl portion 16, and a rear surface portion 22B provided on the rear side of the bowl portion 16. The pair of side surface portions 22R, 22L includes a right side surface portion 22R on the right side and a left side surface portion 22L on the left side.

These are divided by bisectors Lb1 to Lb3 and left and right center lines Lc described below. In a plan view, the bisectors Lb1 to Lb3 include a front bisector Lb1 located at the forefront and a rear bisector Lb3 located at the rearmost of three bisectors Lb1 to Lb3 that bisect the maximum front-rear dimension La of the inner surface portion of the bowl portion 16. The left-right center line Lc is a bisector that bisects the maximum left-right dimension of the inner surface portion of the bowl portion 16 in a plan view. Bisectors Lb1 to Lb3 extend in the left-right direction Y, and left-right center lines Lc extend in the front-rear direction X.

The pair of side surface portions 22R, 22L are located between the front bisector Lb1 and the rear bisector Lb3, the front surface portion 22F is located on the front side of the front bisector Lb1, and the rear surface portion 22B is located on the rear side of the rear bisector Lb 3. The right side surface 22R is located on the right side of the left-right center line Lc, and the left side surface 22L is located on the left side of the left-right center line Lc.

Refer to fig. 1 to 3. An opening 32 is formed in the inner peripheral surface of the rim 26. The opening 32 of the present embodiment is formed only in the left and right side surface portions (right side surface portion 22R) of the toilet bowl portion 16, and is not formed in the left and right side surface portions (left side surface portion 22L), the front surface portion 22F, and the rear surface portion 22B.

The inner peripheral surface of the rim portion 26 is provided with a continuous surface 40, and the continuous surface 40 is provided with a continuous surface 40 that is continuous from the upper end inner edge portion 16a of the bowl portion 16 to the outer peripheral end portion 24a of the waste receiving surface 24 without forming a protruding surface on one of the front surface portion 22F and the rear surface portion 22B of the bowl portion 16. The protruding surface in the present specification refers to a downward surface having an inclination angle of 60 ° or more with respect to a vertical plane, and is formed at a position different from the drain port 44 (described later). Here, the "one face portion 22X" refers to the front face portion 22F of the toilet bowl portion 16 in the present embodiment. The one face portion 22X is provided with a distal end portion of the bidet portion 16 which is one end portion 16b of the bidet portion 16 in the front-rear direction X.

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

The continuous surface 40 of the present embodiment is provided to gradually extend radially inward from the upper end inner edge portion 16a of the bowl portion 16 downward. This makes it easier to visually recognize the dirt adhering to the continuous surface 40 than when the cleaning device is disposed at a position extending radially outward halfway in the downward direction, thereby facilitating the cleaning operation. From the same viewpoint, the continuous surface 40 may be provided to extend substantially vertically downward from the upper end inner edge portion 16a of the bowl portion 16. The continuous surface 40 may be a combination of a portion extending radially inward in the downward direction and a portion extending substantially vertically downward. In the present specification, "substantially" means not only a case where the above-mentioned conditions are strictly satisfied but also a case where an amount of an error such as a dimensional tolerance or a manufacturing error is deviated from a position.

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

As shown in fig. 2, the toilet 10 includes a jet drain 41 for discharging flush water toward the downstream side of the toilet drain 18. The jet outlet 41 of the present embodiment is formed at the tip end of a jet nozzle 43 attached to the toilet 10.

Fig. 5 is a plan sectional view showing a part of fig. 1. Fig. 5 (a) is a cross-sectional view taken along line C-C of fig. 6, which will be described later, and fig. 5 (b) is a cross-sectional view taken along line D-D of fig. 6. The drain portion 42 has a drain port 44 opened on the inner peripheral surface of the rim portion 26 and a water passage 46 for guiding the washing water supplied from the washing water supply device 14 to the drain port 44. The water discharge port 44 of the present embodiment opens forward, and discharges flush water to one side (counterclockwise direction on the paper surface in fig. 5) in the circumferential direction of the revolving direction Dt of the revolving flow Fa in the toilet bowl 16.

Fig. 6 is an enlarged view of a portion of fig. 2. FIG. 7 (a) to FIG. 7 (c) are sectional views of I-I, II-II, III-III in FIG. 6, respectively. Fig. 8 (a) and 8 (b) are sectional views IV-IV and V-V of fig. 6, respectively.

As shown in fig. 5 to 8, the toilet 10 includes a water conduit 48 for guiding flush water discharged from the drain portion 42 in the turning direction Dt. The water conduit 48 is formed by a shelf surface 50 for receiving flush water and an inner peripheral surface of the rim 26. The shelf surface 50 is provided at an outer peripheral portion of the dirt receiving surface 24. The shelf surface 50 of the present embodiment has a convex curved surface portion 52 constituting an inner peripheral end portion of the shelf surface 50, a flat surface portion 54 provided on an outer peripheral side of the convex curved surface portion 52, and a curved surface portion 58 constituting an outer peripheral end portion of the shelf surface 50. The shelf surface 50 is connected by the convex curved surface portion 52 to a concave curved surface portion 56 of the dirt receiving surface 24 located at a lower position than the shelf surface 50. The vertical cross section of the flat surface portion 54 is formed to have a gentle slope compared to the upper end portion of the concave curved surface portion 56.

As shown in fig. 1, the frame surface 50 according to 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 the pair of side surface portions 22R and 22L. The shelf surface 50 of the present embodiment is formed over the entire circumferential range of the pair of side surface portions 22R, 22L and the rear surface portion 22B, and is formed over a part of the circumferential range of the front surface portion 22F.

As shown in fig. 5 to 8, in a plan view, a part of the water conduit 48 of the present embodiment is formed to extend from the drain port 44 in the turning direction Dt of the turning flow Fa and to pass through the opening 32. The frame surface 50 of the present embodiment is formed to be smoothly connected to the bottom surface of the drain opening 44.

The curved surface portion 58 forms a lower inner corner portion of the water guide passage 48 and is a concave curved surface. The curved surface portion 58 has a first fixed section 60, an increasing section 62, a second fixed section 64, a decreasing section 66, and a third fixed section 68 in this order toward the turning direction Dt of the turning flow Fa. The curved surface portion 58 is provided so that the radius of curvature on the vertical cross section changes smoothly in the range from the first fixed section 60 to the third fixed section 68. This means that the radius of curvature does not change sharply in this range to form a step.

The first fixed section 60 is connected to the drain port 44 and has a substantially fixed radius of curvature with a first radius of curvature Ra in the turning direction Dt of the turning flow Fa.

The increasing section 62 is connected to the first fixed section 60 and is formed so that the radius of curvature increases continuously from the first radius of curvature Ra to the second radius of curvature Rb in the turning direction Dt of the turning flow Fa.

The second fixed section 64 connects the increasing section 62 and the decreasing section 66, and forms a substantially constant radius of curvature with a second radius of curvature Rb toward the revolving direction Dt of the revolving flow Fa.

The decreasing section 66 is connected to the third fixed section 68, and is formed so that the radius of curvature decreases continuously from the second radius of curvature Rb to the third radius of curvature Rc in the turning direction Dt of the turning flow Fa.

The third fixed section 68 has a substantially constant radius of curvature with a third radius of curvature Rc in the turning direction Dt of the turning flow Fa. The third radius of curvature Rc is set to be substantially the same as a radius of curvature of a portion 58a (see fig. 1) of the curved surface portion 58 provided at a position bilaterally symmetrical to the third fixed section 68.

As shown in fig. 5, the increased section 62 constitutes an upper guide portion 72, and the upper guide portion 72 is provided in the flushing water path 70 (see fig. 1) from the drain portion 42 to the one end portion 16b (front end portion) in the front-rear direction X of the toilet bowl portion 16. The flush water path 70 here is a flow path of the flush water discharged from the drain portion 42 in the bowl portion 16. As described in detail later, the upper guide portion 72 guides at least a part of the washing water discharged from the drain portion 42 upward.

The increased section 62 constitutes an inner guide 74 provided in the side surface portion 22R of the toilet bowl portion 16. As described in detail later, the inner guide 74 guides a part of flush water that collides with itself radially inward.

In a plan view, at least a part of the increased section 62 of the present embodiment is provided on the back side of the opening 32 and on the outer side of the drain opening 44 at a position intersecting the center line Ld of the drain opening 44 extending from the drain opening 44. The extension section 62 of the present embodiment is provided on the side surface portion 22R of the toilet bowl portion 16 adjacent to one surface portion 22X (front surface portion 22F) of the toilet bowl portion 16 in the opposite side (clockwise direction) to the circumferential direction of the rotation direction Dt, out of the pair of side surface portions 22R, 22L of the toilet bowl portion 16. The increased section 62 is provided in the vicinity of the drain port 44 on the downstream side from the drain port 44 of the drain portion 42. The term "vicinity" as used herein means a range within 20mm from the drain opening 44. The conditions described here are also satisfied by the upper guide portion 72 and the inner guide portion 74.

The above flushing method of the toilet apparatus 12 will be explained. The toilet apparatus 12 of the present embodiment discharges the waste by a flush-type flushing method in which the waste is flushed away by a fall of water. The flush water supply device 14 supplies a predetermined amount of flush water to the drain 42 when a predetermined flush start condition is satisfied. The flush water supply device 14 receives a flush start operation using an operation member such as a joystick or an electric device such as a remote controller or a smartphone.

Fig. 9 is a diagram showing a flow pattern of the washing water. In this figure, the flow direction of the washing water is indicated by an arrow. The drain section 42 discharges the flush water supplied from the flush water supply device 14 into the bowl section 16. The flush water discharged from the drain portion 42 forms a swirling flow Fa that swirls in the bowl portion 16. The swirling flow Fa is formed to flow forward along the right side surface 22R via the front surface 22F, the left side surface 22L, and the rear surface 22B of the bowl portion 16. The swirling flow Fa is formed to flow along the rack surface 50 while passing through the side surface portions 22R and 22L and the rear surface portion 22B of the bowl portion 16. The swirling flow Fa becomes the main flow. The "main flow" in the present specification means a striped flow in which a part of the washing water flows in a locally gathered state. A part of the washing water forming the revolving flow Fa gradually divides into a branch flow Fb on the way of revolving along the inside of the bowl portion 16, and the branch flow Fb flows toward the bottom side of the bowl portion 16 and falls.

The water flows Fb and Fg (water flow Fg will be described later) flowing toward the bottom of the bowl portion 16 are flows for pushing in the waste into the inlet 18a of the toilet drain passage 18. The waste in the bowl portion 16 is discharged through the toilet drain passage 18 by the water flows Fb and Fg.

Refer to fig. 2. The jet drain port 41 discharges the flush water supplied from the flush water supply device 14 to the downstream side in the toilet drain path 18. The jet drain port 41 of the present embodiment discharges flush water in the toilet drain path 18 while the flush water flows downstream. The flush water discharged from the jet discharge port 41 amplifies the flow of water flowing downstream in the toilet drain path 18.

Fig. 10 and 11 are views schematically showing the flow pattern of the washing water. Fig. 10 is a view of the toilet 10 as viewed from the rear of the upper left side, and fig. 11 is a sectional view of a part of the toilet 10 as viewed from the left side. In fig. 10, for convenience of explanation, a line Lc' is marked at a position where the left and right center lines Lc of fig. 1 pass. In fig. 10, the upper side of the area where the flush water reaches while flowing along the inner peripheral surface of the rim 26 is marked with a line Le.

At least a part of the flush water discharged from the drain 42 is guided upward by colliding with the upper guide 72 (the increased section 62 of the water conduit 48), and forms a first guide flow Fc. In this way, the upper guide 72 (the increased section 62 of the water conduit 48) guides at least a part of the flush water upward without using a centrifugal force. The first guide flow Fc is formed as a part of the aforementioned revolving flow Fa. The first guide flow Fc of the present embodiment is guided by the increased section 62 to ascend away from the dirt receiving surface 24 (jump ね. The first guide flow Fc is formed to flow upward along the inner peripheral surface of the rim portion 26 in the revolving direction Dt and then to flow downward by its own weight on the flush water path 70. The first guide flow Fc of the present embodiment is formed to reach the highest point Ph outside the opening portion 32 in the flush water path 70.

A part of the flush water discharged from the drain 42 collides with the inner guide 74 (the increased section 62 of the water conduit 48) and spreads, and is guided radially inward of the bowl 16 to form a second guide flow Fd. The second guide flow Fd is formed to flow down from the shelf surface 50 toward the concave curved surface portion 56. The second guide flow Fd merges with the revolving flow Fa formed in the toilet bowl portion 16. These merging positions Sa (see also fig. 9) are radially inward of the inner peripheral surface of the edge portion 26 in a plan view, that is, are positions having no projecting surfaces.

A part of the flush water discharged from the drain 42 is formed into a straight flow Fe that runs straight without being guided to the upper and radially inner sides by the increased section 62 (the upper guide 72 and the inner guide 74) of the water conduit 48. The straight flow Fe forms a part of the revolving flow Fa. In the present embodiment, a part of the washing water discharged from the drain 42 forms the first guide flow Fc, another part of the washing water forms the second guide flow Fd, and the remaining part of the washing water forms the straight flow Fe. The straight flow Fe flows in the rotation direction Dt along the inner circumferential surface of the rim portion 26 in the flush water path 70.

The first guide flow Fc and the straight flow Fe flow toward the one end portion 16b (distal end portion) of the bowl portion 16 on the flush water path 70. In the course of flowing through this path, the straight-flow Fe exerts an upward velocity component by being subjected to centrifugal force, thereby flowing upward. The first guide flow Fc interferes with the upward flow by merging with the other water flow (straight flow Fe) to be flowed upward in the course of the downward flow. The first guide flow Fc cancels at least a part of the upward velocity component of the rectilinear flow Fe by merging with the rectilinear flow Fe. At least a part of these merging positions is on the flushing water path 70. The first guide flow Fc joins other water flows (straight flows Fe) and flows upward by centrifugal force while flowing along the joined other water flows on one face portion 22X (front face portion 22F). Then, the first guide flow Fc flows downward in the turning direction Dt than the one end 16b of the toilet bowl portion 16 in the front-rear direction X, is received by the rack surface 50 together with the merged other water flow, and flows on the rack surface 50 in the turning direction Dt.

The flush water forming the first guide flow Fc and the straight flow Fe turns in the bowl portion 16 as a part of the aforementioned turning flow Fa, and further flows forward on the right side surface 22R of the bowl portion 16. The second guide flow Fd merges with the swirling flow Fa flowing forward on the right side surface portion 22R of the bowl portion 16. In this way, the swirling flow Fa merged with the second guide flow Fd forms a part of the flush water flowing without being guided radially inward by the inner guide 74. The second guide flow Fd that merges with the swirling flow Fa forms a flow Fg that flows down toward the water reservoir 28 of the bowl portion 16 through a part 56a of the concave curved surface portion 56 on the one surface portion 22X (front surface portion 22F) of the bowl portion 16 at a position below the frame surface 50 of the waste receiving surface 24, out of the front surface portion 22F and the rear surface portion 22B of the bowl portion 16 (see also fig. 9).

The toilet 10 of the present embodiment is configured to form the above flow of flush water. With such a configuration, the shape of the bowl portion 16 of the toilet 10, the flow rate of flush water discharged from the drain portion 42, the direction in which flush water is discharged, and the like are determined. The flow rate of the washing water is determined by, for example, the cross-sectional shapes of the drain port 44 and the water passage 46 of the drain unit 42. The "shape of the bowl portion 16" herein includes the 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 toilet 10 described above will be explained. The toilet 10 includes an upper guide portion 72 for guiding flush water upward. Therefore, the first guide flow Fc can be formed in the flush water path 70 so as to be guided upward by the upper guide portion 72 and then to flow downward by its own weight. Therefore, the upward velocity component of the water flow flowing through the one face portion 22X (front face portion 22F) of the bowl portion 16 can be reduced as compared with the case where such a first guide flow Fc is not formed. Accordingly, the flush water can be prevented from flying out of the one face portion 22X (front face portion 22F).

The first guide flow Fc flows upward together with the other water flow by centrifugal force while merging with the other water flow (straight flow Fe) in the course of flowing downward and flowing through the one face portion 22X (front face portion 22F). Thus, the range of flushing of the one face portion 22X can be widened in the vertical direction, compared to the case where the first guide flow Fc is not merged with the water flow and flows upward.

The flush water guided by the inner guide 74 merges with the revolving flow Fa formed in the toilet bowl 16 at a position radially inward of the inner peripheral surface of the rim 26 in a plan view. Thus, the flushing water guided by the inner guide 74 merges with the revolving flow Fa to amplify the water force, thereby improving the flushing capability of the bowl portion 16.

Since the inner guide 74 guides a part of the washing water radially inward, the flow rate of the washing water (the second guide flow Fd) merged with the swirling flow Fa can be reduced more than the case of guiding the whole washing water, and the splash caused by the merging with the swirling flow Fa can be suppressed. Thus, even if the flush water guided by the inner guide 74 and the swirling flow Fa merge at a position where no projection surface is formed, the spray can be suppressed from flying out of the toilet bowl portion 16.

The swirling flow Fa merged with the second guide flow Fd formed by the inner guide 74 forms a part of the washing water discharged from the drain 42. Thus, the other drain 42 may not be provided to form the swirling flow Fa. At the same time, the number of the drain portions 42 required for the toilet 10 can be reduced, and accordingly, good appearance can be obtained.

The inner guide 74 is provided in the vicinity of the drain port 44 at a position downstream of the drain port 44 of the drain unit 42. Accordingly, compared to the case where the inner guide 74 is provided at a position away from the water discharge opening 44 at a position on the downstream side of the water discharge opening 44, the position at which the second guide flow Fd and the swirling flow Fa merge together can be made closer to the water discharge opening 44, and accordingly, the swirling distance of the swirling flow Fa in the toilet bowl portion 16 before merging with the second guide flow Fd can be shortened. If the flow rate of the flush water supplied into the toilet bowl portion 16 is small, the water potential of the revolving flow Fa is weaker as the position of the junction of the second guide flow Fd and the revolving flow Fa is farther from the water discharge port 44 in the revolving direction Dt of the revolving flow Fa, and a region where the flush water cannot be completely flushed is likely to occur. In this regard, according to the present embodiment, even when the flow rate of the washing water is small, a wide area in the toilet bowl portion 16 can be washed.

(a) The drain 42 discharges flush water into the bowl 16 through the opening 32 formed in the side surface 22R of the bowl 16. Thus, compared to the case where the opening 32 is formed in the rear surface 22B of the bowl portion 16, when the toilet 10 is viewed from the front, the opening 32 is less visible, and a good appearance can be obtained. In addition, compared to the case where the opening 32 is formed in the rear surface 22B of the toilet bowl portion 16, the opening 32 is easily reached by hand from the front side of the toilet bowl 10, and good cleaning performance is obtained.

In order to suppress the flush water from flying out, a means of forming the opening 32 in the front surface 22F or the rear surface 22B of the bowl portion 16 is also conceivable. This makes it possible to increase the turning distance of the turning flow Fa from the drain 42 to the one surface 22A, and to reduce the water potential of the turning flow Fa, thereby suppressing the flush water from flying out. According to the present embodiment, the flush water can be suppressed from flying out without adopting such a method.

On the inner peripheral surface of the rim portion 26, a continuous surface 40 having no protruding surface is provided on one surface portion 22X (front surface portion 22F). Thus, even if one of the face portions 22X has no projecting surface, the flush water flowing on the continuous surface 40 can be prevented from flying out.

A continuous surface 40 is provided on the inner peripheral surface of the rim 26 at a position other than the opening 32 over the entire periphery of the bowl portion 16. Accordingly, since no protruding surface that is difficult to reach by a hand during wiping is provided over a wide range in the circumferential direction of the bowl portion 16, the inner circumferential surface of the rim portion 26 can be easily wiped.

The upper guide portion 72 is constituted by the increased section 62 of the curved surface portion 58 of the water conduit 48. This makes it possible to form the upper guide portion 72 without forming irregularities over a wide range on the bottom surface (shelf surface 50) of the water conduit 48, and to obtain a good appearance.

The inner guide 74 is formed by the increased section 62 of the curved surface portion 58 of the water conduit 48. Therefore, the inner guide 74 can be formed on the bottom surface (the shelf surface 50) of the water conduit 48 without forming irregularities over a wide range, and good appearance can be obtained.

The curved surface portion 58 has a decreasing section 66 disposed closer to the turning direction Dt of the turning flow Fa than the increasing section 62. As a result, the other section (third fixed section 68) having a smaller curvature radius than the maximum curvature radius of the increasing section 62, which is provided in the turning direction Dt than the increasing section 62, can be smoothly connected to the increasing section 62 via the decreasing section 66. Meanwhile, when the curved surface portion 58 of the water conduit 48 has the increased section 62, no significant step surface is formed between the increased section 62 and the other sections, and good appearance is obtained.

The curved surface portion 58 has a second fixed section 64 connecting the increasing section 62 and the decreasing section 66. This prevents the formation of a distinct convex portion by the increased section 62 and the decreased section 66, thereby achieving good appearance.

Other features are described next. Refer to fig. 4. The inner peripheral surface of the edge portion 26 is provided with a first curvature changing point 30a that becomes a boundary between the front region 30F and the intermediate region 30S, and a second curvature changing point 30B that becomes a boundary between the rear region 30B and the intermediate region 30S.

Refer to fig. 10. Preferably, the highest point Ph of the first guide flow Fc is disposed in the vicinity of the curvature change point 30a, and the curvature change point 30a is located at the boundary between the region (front region 30F) of the front region 30F and the rear region 30B of the rim portion 26, which is provided in the face portion 22X (front portion 22F) of the bowl portion 16, and the middle region 30S. More specifically, it is more preferable that the highest point Ph of the first guide flow Fc is within a range from the curvature changing point 30a to the upstream side in the front-rear direction X (in this example, the rear side in the front-rear direction X) by 30mm and to the downstream side in the front-rear direction X (in this example, the front side in the front-rear direction X) by 15mm in a plan view. This is set based on the experimental findings of the present inventors. Thus, the first guide flow Fc is easily caused to flow downward before flowing to the region 30F with a small radius of curvature and starting to receive a large centrifugal force. Accordingly, the wash water tends to flow downward, and easily merges with the straight flow Fe, and when the wash water forming the straight flow Fe and the first guide flow Fc flows on the one face portion 22X (front face portion 22F) of the bowl portion 16, the flush water can be effectively prevented from running out.

As shown in fig. 6 to 8, in the toilet bowl portion 16, a protruding surface 76 is provided on the rear side of the opening 32 and on the outer side of the drain opening 44. The protruding surface 76 forms the upper edge of the opening 32. The projecting surface 76 is provided on the inner peripheral surface of the rim portion 26 so as to extend radially inward toward the upper side. The protruding surface 76 is provided in a range extending from the drain portion 42 in a part of the rotation direction Dt in the flush water path 70. In the toilet bowl portion 16 of the present embodiment, the projection surface 76 is provided only on the back side of the opening portion 32, and the projection surface 76 is not provided on the outer side thereof.

The protruding surface 76 is inclined with respect to the horizontal plane so as to extend continuously upward from the drain portion 42 toward the rotation direction Dt. The protruding surface 76 is formed such that the diameter dimension thereof decreases from the drain portion 42 toward the rotation direction Dt. The protruding face 76 is provided at a position that contacts the aforementioned first guide flow Fc formed by the upper guide portion 72 from above.

Thus, even when the amount of supply of flush water from the flush water supply device 14 increases rapidly and the flush water rises greatly by the upper guide portion 72, the rise of the flush water can be restricted by the projection surface 76. Accordingly, the flush water can be prevented from being thrown out of the toilet bowl 16. Further, there is an advantage that the projecting surface 76 can be washed by the flush water guided upward by the upper guide 72.

The inner peripheral surface of the rim portion 26 of the present embodiment is provided with an upper surface portion 78, and the upper surface portion 78 is provided above the opening portion 32 while forming the opening portion 32. The upper surface portion 78 is not formed with a protruding surface, and continues from the upper end inner edge portion 16a of the bowl portion 16 to the upper edge portion of the opening 32. The upper surface portion 78 smoothly connects with a portion 26a of the inner peripheral surface of the edge portion 26 that is adjacent to the upper surface portion 78 on both sides in the circumferential direction. The term "smoothly connected" as used herein means that two objects are connected without forming unevenness therebetween.

Refer to fig. 5. The bottom surface 42a of the drain portion 42 has a slope that slopes downward toward the drain opening 44 in a range from a position further to the back than the drain opening 44 to the drain opening 44. This makes it difficult for the inside of the drain portion 42 to accumulate residual water, and good sanitation can be obtained.

(second design Point)

Fig. 12 is a sectional view taken along line E-E of fig. 1, and fig. 13 is a sectional view taken along line F-F of fig. 1. As shown in fig. 2 to 4, 12, and 13, the inner peripheral surface of the rim portion 26 includes a first surface region 90 provided on the side surface portions 22R and 22L of the bidet portion 16, and second surface regions 92 and 94 provided on at least one of the front surface portion 22F and the rear surface portion 22B of the bidet portion 16. The inclination angle θ b of the second surface regions 92 and 94 with respect to the vertical plane Pv is gentler than the inclination angle θ a of the first surface region 90 with respect to the vertical plane Pv. The inclination angle with respect to the vertical plane Pv here means an inclination angle at an acute angle with respect to the vertical plane on a vertical cross section passing through the center Cp of the bowl portion 16. Hereinafter, for ease of description, 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.

The gentle slope regions 92 and 94 include a front gentle slope region 92 (one side gentle slope region) provided on the front surface 22F of the front surface 22X which is one of the front surface 22F and the rear surface 22B of the bidet part 16, and a rear gentle slope region 94 (the other side gentle slope region) provided on the rear surface 22B which is the other of the front surface 22F and the rear surface 22B.

The steep slope region 90 is provided in a circumferential range including a middle portion of the bowl portion 16 in the front-rear direction. The front gentle slope region 92 is provided in a circumferential range including one end portion 16b (front end portion) of the bidet portion 16, and the rear gentle slope region 94 is provided in a circumferential range including the other end portion 16c (rear end portion) of the bidet portion 16 in the front-rear direction X. A front gentle slope region 92 is provided on at least a majority of the front portion 22F of the bowl portion 16 and a rear gentle slope region 94 is provided on at least a majority of the rear portion 22B of the bowl portion 16. The front gentle slope region 92 of the present embodiment is provided over the entire front surface 22F of the bowl portion 16.

A front boundary portion 96 that forms a boundary between the steep slope region 90 and the front gentle slope region 92 is provided at an end portion of the front surface portion 22F and the side surface portions 22R and 22L of the toilet bowl portion 16 near the boundary when viewed from the side. The front boundary portion 96 of the present embodiment is provided at the end portions of the side surface portions 22R, 22L close to the front surface portion 22F.

The rear boundary portion 98, which is the boundary between the steep slope region 90 and the rear gentle slope region 94, is provided at the end of any of the side surface portions 22R, 22L and the rear surface portion 22B of the bowl portion 16 near the boundary when viewed from the side. The rear boundary 98 of the present embodiment is provided at the end of the rear face 22B near the side faces 22R and 22L.

The 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 portion 22R of the bidet portion 16, and the opening 32 is not formed in the steep slope region 90 provided in the left side surface portion 22L. The gentle slope regions 92 and 94 do not form the opening 32.

As shown in fig. 12, the front gentle slope region 92 includes a first steepest portion 92a provided at one end portion 16b (front end portion) of the bidet portion 16, and a first angle change portion 92b provided between the first steepest portion 92a and the front boundary portion 96. The first inclined 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 thereof. The first angle changing portion 92b continuously changes the inclination angle so as to approach the inclination angle of the first steepest portion 92a as it approaches the one end portion 16b (tip end portion) of the bidet portion 16 from the front side boundary portion 96.

As shown in fig. 13, the rear gentle slope region 94 includes a second inclination-most portion 94a provided at the other end portion 16c (rear end portion) of the bidet portion 16 and a second angle change portion 94b provided between the second inclination-most portion 94a and the rear boundary portion 98. The second 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 thereof. The second angle changing portion 94b continuously changes the inclination angle so as to approach the second inclination-most portion 94a as it approaches the other end portion 16c (rear end portion) of the bidet portion 16 from the rear side boundary portion 98.

The steep sloped region 90 and the shallow sloped regions 92, 94 are provided with the continuous surface 40. The steep slope region 90 provided in the right side surface portion 22R has the continuous surface 40 provided at a position other than the opening portion 32 over the entire circumferential range thereof. The steep slope regions 90 and the gentle slope regions 92 and 94 provided in the left side surface portion 22L are provided with the continuous surface 40 over the entire circumferential range thereof.

In the present embodiment, the steep slope region 90 constitutes the intermediate region 30S, the front gently slope region 92 constitutes the front region 30F, and the rear gently slope region 94 constitutes the rear region 30R. In a plan view, the steep slope region 90 is curved with a radius of curvature within the third range R3, and the gentle slope regions 92 and 94 are curved with a radius of curvature smaller than the radius of curvature of the third range R3.

The effects of the above design points will be described. Fig. 14 is an explanatory diagram of the centrifugal force Fa acting on the washing water W. In the present figure, the centrifugal force Fa is represented by a first component force Fa1 in the normal direction of the inner peripheral surface of the edge portion 26 and a second component force Fa2 in the in-plane direction of the inner peripheral surface.

In the flush water, when flowing along the inner peripheral surface of the rim 26, a centrifugal force Fa acts on the flush water. The component (Fa × sin θ) of the second component force Fa2 of the centrifugal force Fa increases as the inclination angle θ of the inner circumferential surface of the edge portion 26 increases. This means that the larger the inclination angle θ of the inner peripheral surface of the rim portion 26, the more likely the washing water will be subjected to the centrifugal force Fa and reach a large vertical range. The vertical range herein refers to a range in the vertical direction Z.

The inclination angle θ b of the gentle slope regions 92 and 94 in the present embodiment is gentler than the inclination angle θ a of the steep slope region 90. Therefore, the flush water subjected to the centrifugal force in the gentle slope regions 92 and 94 provided in the front surface portion 22F or the rear surface portion 22B of the bowl portion 16 can easily reach a wider vertical range than in the case where the inclination angles are made the same in the steep slope region 90 and the gentle slope regions 92 and 94. Accordingly, the flush range on the continuous surface 40 of the gentle slope regions 92 and 94 can be widened in the vertical direction.

In order to enlarge the washing range in the vertical direction in this way, in addition to this, a method of reducing the radius of curvature of the inner peripheral surface of the edge portion 26 in a plan view may be considered. According to the present embodiment, there is an advantage that the contour of the bowl portion 16 can be changed without a large change as compared with the case of adopting such a method.

In particular, the flush range provided on the continuous surface 40 of the front surface 22F of the toilet bowl portion 16, which is easily contaminated by urine, can be widened. Further, the flush range provided on the continuous surface 40 of the rear surface portion 22B of the toilet bowl portion 16, which is difficult to wipe, can be widened.

The drain 42 discharges wash water into the bowl 16 through the opening 32 formed in the steep slope area 90. Thus, the opening 32 is less conspicuous in a plan view, and a good appearance can be obtained, as compared with the case where the opening 32 is formed in the gently sloping regions 92 and 94. In addition, the above-described effect (a) can be obtained.

Other features are explained. Refer to fig. 4. The shelf surface 50 is connected to the front gently inclined surface region 92 in the rotation direction Dt from the front end or the rear end of the toilet bowl portion 16 provided on the front surface portion 22F (one surface portion 22X) and the rear surface portion 22B (the other surface portion) of the toilet bowl portion 16. More specifically, the frame surface 50 is connected to the front gentle slope region 92 in the rotation direction Dt from the front end of the bowl portion 16, and is connected to the rear gentle slope region 94 in the rotation direction Dt from the rear end of the bowl portion 16.

Thus, the rack surface 50 is easily subjected to washing water that rises and then falls by centrifugal force while passing through the front gentle slope region 92 and the rear gentle slope region 94. Accordingly, most of the flush water passing through the front gentle slope region 92 and the rear gentle slope region 94 is sent to a remote place through the water conduit 48.

The frame surface 50 is connected to the front gentle slope surface region 92 on the front surface 22F of the bowl portion 16 on the opposite side of the front end of the bowl portion 16 from the direction Dt of the revolving flow Fa. The frame surface 50 is connected to the rear gentle slope surface region 94 over the entire rear surface 22B of the bowl portion 16.

A portion of the concave curved surface portion 56 of the dirt receiving surface 24 is disposed on the front surface portion 22F of the bowl portion 16. The concave curved surface portion 56 is continuous from the lower end edge portion 24b of the dirt receiving surface 24 to the outer peripheral end portion 24a of the dirt receiving surface 24 at least at the left and right center portions 16d of the bowl portion 16. The concave curved surface portion 56 is connected to the front gentle slope region 92 at the left and right central portions 16d of the bowl portion 16 without passing through the frame surface 50. The frame surface 50 may not be provided at the left and right center portions 16d of the bowl portion 16 at the front surface 22F of the bowl portion 16.

If the inner peripheral end portions 50a (the convex curved surface portions 52) of the convex curved surface-shaped shelf surfaces 50 are provided at the left and right central portions 16d in the front surface 22F of the bowl portion 16, droplets are likely to be generated when urine hits the inner peripheral end portions 50 a. In this regard, according to the present embodiment, since the inner peripheral end portion of the convex curved shelf surface 50 is not provided in the left and right central portions 16d, the splash of urine can be suppressed.

Refer to fig. 1. The bowl portion 16 is provided at a substantially symmetrical position in a range excluding the opening 32 and a portion on the rear side of the opening 32. It is understood that the dirt receiving surface 24 is provided at a substantially bilaterally symmetrical position in a range from the inner peripheral end portion 50a of the shelf surface 50 to the lower end edge portion 24b of the dirt receiving surface 24. The inner peripheral end 50a of the shelf surface 50 may be disposed at a substantially bilaterally symmetrical position. It is to be understood that the inner peripheral surface of the edge portion 26 is provided at a substantially bilaterally symmetrical position in a range other than the opening portion 32.

The position of the edge in the toilet bowl 10 can be easily visually recognized. In the present embodiment, the inner peripheral end 50a of the shelf surface 50 serving as the edge is provided at a position symmetrical to the left and right. Therefore, when the shape of the shelf surface 50 or the like is asymmetrical to the left and right due to a manufacturing error or the like, it is easy to visually recognize the shape, and the work of inspecting the product can be facilitated.

(second embodiment)

Fig. 15 is a side sectional view showing a part of the toilet 10 according to the second embodiment. In the toilet 10 of the first embodiment, the inclination angles θ b of the front gentle slope region 92 and the rear gentle slope region 94 are substantially the same. In contrast, in the toilet 10 of the present embodiment, the inclination angle θ b of the front gentle slope region 92 and the rear gentle slope region 94 is different. Specifically, the rear gentle slope region 94 is shallower than the front gentle slope region 92 by the inclination angle θ b with respect to the vertical plane. In the present embodiment, the inclination angle of the entire second steeply inclined portion 94a of the rear gentle slope region 94 is gentler than the inclination angle of the first steeply inclined portion 92a of the front gentle slope region 92. The reason will be described.

As described above, the swirling flow formed by the washing water discharged by the drain portion 42 passes through the front gentle slope region 92 (one-side second surface region) and then passes through the rear gentle slope region 94 (the other-side second surface region). Therefore, when passing through the rear gentle slope region 94, the water potential of the swirling flow is weaker than when passing through the front gentle slope region 92, and it is difficult to achieve a large vertical range by receiving centrifugal force.

In this regard, in the present embodiment, even when the swirling flow of weak water flows through the rear gentle slope region 94, the washing water easily reaches a large vertical range of the rear gentle slope region 94. In particular, since the above-described object is achieved, the flow of the washing water discharged from the drain portion 42 is not increased, and the situation in which the washing water is splashed from the front gentle slope region 92 accompanying the increase in the flow can be avoided.

The embodiments have been described above. Next, a modified example of each component will be described.

The toilet apparatus 12 may be flushed by a flushing method other than the flush method. The flushing method is, for example, a siphon method.

The opening 32 of the bidet part 16 may be formed in the front part 22F or the rear part 22B in addition to the side parts 22R and 22L. The opening 32 may be formed in the gentle slope regions 92 and 94 in addition to the steep slope region 90. A plurality of openings 32 may be formed in the bowl portion 16.

The shelf surface 50 of the toilet bowl portion 16 and the like may not be provided at substantially symmetrical positions.

The inner peripheral surface of the edge portion 26 may have a projecting surface over the entire circumference. The inclination angle may be substantially the same at a position on the inner peripheral surface of the rim portion 26 over the entire periphery of the bowl portion 16.

The continuous surface 40 may be formed without the aforementioned protruding surface. When this condition is satisfied, the continuous surface 40 may be provided so as to extend radially outward at least partially as going downward from the upper end inner edge portion 16a of the bowl portion 16.

The water discharge port 44 of the water discharge portion 42 is formed on the back side of the opening portion 32 of the rim portion 26 by way of example, and the opening portion 32 may constitute the water discharge port 44. In this case, the projecting surface 76 may not be provided on the inner peripheral surface of the rim portion 26. The direction Dt of the swirling flow Fa formed by the drain 42 may be clockwise.

One end 16b of the bowl portion 16 in the front-rear direction X through which the swirling flow Fa formed by the drain portion 42 first passes may be set as the rear end of the bowl portion 16, and the other end 16c of the bowl portion 16 through which the swirling flow Fa passes may be set as the front end of the bowl portion 16. In this case, the one face portion 22X provided with the one end portion 16B of the bidet portion 16 serves as the rear face portion 22B of the bidet portion 16, and the other face portion provided with the other end portion 16c of the bidet portion 16 serves as the front face portion 22F of the bidet portion 16.

As in the embodiment, a case is considered in which the one end of the bowl portion 16 through which the revolving flow Fa passes first is the front end of the bowl portion 16, and the one face portion 22X provided with the one end of the bowl portion 16 is the front face portion 22F of the bowl portion 16. In this case, the drain portion 42 may be provided on, for example, the side surface portion 22R adjacent to the front surface portion 22F (one surface portion 22X) of the bowl portion 16 on the opposite side in the circumferential direction of the rotation direction Dt and the rear surface portion 22B adjacent to the side surface portion 22R.

Consider a case where the one end of the bowl portion 16 through which the revolving flow Fa passes first is the rear end of the bowl portion 16, and the one surface portion 22X provided at the one end of the bowl portion 16 is the rear surface portion 22B of the bowl portion 16. In this case, the drain portion 42 may be provided on, for example, a side surface portion 22L adjacent to the rear surface portion 22B (one surface portion 22X) of the bowl portion 16 on the opposite side in the circumferential direction of the rotation direction Dt and a front surface portion 22F adjacent to the side surface portion 22L.

(first design Point)

The description has been given by taking the example in which the upper guide 72 constitutes the increased section 62 of the water conduit 48, and specific examples thereof are 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 drain portion 42 or the shelf surface 50 of the water conduit 48. Alternatively, the inclined surface may be formed on the member and inclined upward in the rotation direction Dt.

The above description has been given by way of example in which the upper guide portion 72 guides a part of the flush water discharged from the drain portion 42 upward, but all of the flush water may be guided upward.

The increasing section 62 of the water conduit 48 is described by way of example as the inner guide 74, and specific examples thereof are not particularly limited. The inner guide 74 may be a projection formed on the shelf surface 50 of the water conduit 48, for example.

The upper guide 72 and the inner guide 74 may be provided at positions different from the vicinity of the drain opening 44.

The upper guide 72 and the inner guide 74 are described as examples of the same portion (the increased section 62) constituting the water conduit 48, but may be different portions from each other, and neither may be provided.

The example in which the increased section 62 of the water conduit 48 is formed outside the water drain portion 42 has been described, but may be formed inside the water drain portion 42.

The increased section 62 and the other section 68 of the water conduit 48 may be connected to each other via a step surface without the decreased section 66.

The flush toilet 10 has been described as being configured to form the first guide flow Fc and to have the upper guide portion 72, but the upper guide portion 72 may not be provided.

(second design Point)

The first surface region 90 is a steep slope region inclined with respect to the vertical plane, but may be a vertical plane region substantially parallel to the vertical plane.

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

Consider the case where the turning flow Fa passes through the rear gentle slope region 94 and then through the front gentle slope region 92. In this case, in order to obtain the effect of the above-described (b), the inclination angle θ b of the front gentle slope region 92 closer to the rear gentle slope region 94 may be made gentle.

The first surface region 90 is provided on the side surface portion 22R of the bidet portion 16, and the second surface regions 92 and 94 are provided on the front surface portion 22F and the rear surface portion 22B of the bidet portion 16. Alternatively, in a plan view, the first surface region 90 may be curved with a radius of curvature within the third range, the second surface regions 92 and 94 may be curved with a radius of curvature smaller than the radius of curvature within the third range, and the first surface region 90 and the second surface regions 92 and 94 may be provided at positions unrelated to the front surface 22 of the toilet bowl portion 16 and the like. For example, in a plan view, the inner peripheral surface of the edge portion 26 is rectangular, the sides of the four sides of the rectangle are curved first surface regions 90, and the corners of the four sides are curved second surface regions 92 and 94.

The embodiments and the modifications are explained in detail above. The embodiments and the modifications are merely specific examples. The embodiments and the modifications are capable of performing various design changes such as changes, additions, and deletions of the components. In the above-described embodiments, the description of "embodiment" and the like is given and emphasized with respect to the content in which the above-described design change is possible, but the design change is permitted even if the content does not have such a description. The hatching marked on the cross section of the drawings does not limit the material of the object marked with the hatching.

Any combination of the above-described constituent elements is effective as a mode of the idea of the technology for abstracting the embodiment and the modification. For example, any of the items described in the other embodiments may be combined with the embodiments, or any of the items described in the embodiments and the other modifications may be combined with the modifications.

When the above embodiments and modifications are generalized, the following technical ideas can be derived.

In the flush toilet of the second aspect, in addition to the first aspect, the flush water guided upward by the upper guide may be a guide flow that flows upward in the flush water path and then flows downward.

In the flush toilet of the third aspect, in addition to the second aspect, the guide flow may join another flow while flowing downward, and may flow upward by centrifugal force while flowing along the one face portion together with the joined another flow. In this way, the range of flushing on one face can be widened in the vertical direction, compared to the case where the guide flow and the other water flow are not merged and flow upward.

A flush toilet according to a fourth aspect may be arranged such that, in addition to the first to third aspects, a continuous surface that is continuous from an upper end inner edge portion of the bowl portion to an outer peripheral end portion of the waste receiving surface without forming a protruding surface is provided on the inner peripheral surface of the edge portion on the one surface portion. With this aspect, even if there is no protruding surface on one face, the flush water flowing on the continuous surface can be prevented from splashing.

A flush toilet according to a fifth aspect may be configured such that, in addition to any one of the first to fourth aspects, the water discharge portion discharges flush water into the bowl portion through an opening formed in a side surface portion of the bowl portion. In this aspect, the opening is easily reached by the hand from the front side of the flush toilet, and a good cleaning performance can be obtained, as compared with a case where the opening is formed in the rear face of the bowl portion.

A flush toilet according to a sixth aspect is the flush toilet according to the fifth aspect, wherein a continuous surface that does not form a protruding surface from an upper end inner edge portion of the bowl portion to an outer peripheral end portion of the waste receiving surface is provided on an inner peripheral surface of the rim portion, and the continuous surface is provided on the inner peripheral surface of the rim portion over the entire periphery of the bowl portion at a position other than the opening portion. In this aspect, the inner peripheral surface of the rim portion is easily wiped since the projecting surface that is difficult to reach by a hand during wiping is not provided over a wide range in the circumferential direction of the toilet bowl portion.

A flush toilet according to a seventh aspect may be configured such that, in addition to any one of the first to sixth aspects, the flush toilet further includes a water conduit for guiding the flush water in a turning direction of the turning flow, the water conduit includes a curved surface portion that forms a lower inside corner portion of the water conduit, the curved surface portion has an increasing section in which a radius of curvature continuously increases as the curved surface portion extends in the turning direction, and the upper guide portion forms the increasing section. In this aspect, the upper guide portion can be formed on the bottom surface of the water conduit without forming irregularities over a wide range, and good appearance can be obtained.

A flush toilet according to an eighth aspect may be arranged such that, in addition to the seventh aspect, the curved surface portion has a decreasing section which is provided closer to the pivot direction than the increasing section and has a curvature radius which continuously decreases toward the pivot direction. In this aspect, when the curved surface portion of the water conduit has the increased section, a conspicuous step surface is not formed between the increased section and another section having a smaller curvature radius in the turning direction than the increased section, and the other section is provided, and good appearance can be obtained.

A flush toilet according to a ninth aspect may be configured such that, in addition to any one of the first to eighth aspects, a protruding surface that comes into contact with flush water guided upward by the upper guide portion from above is provided. With this configuration, even when the amount of supply of the washing water from the washing water supply device increases rapidly and the washing water rises greatly by the upper guide, the rising of the washing water can be restricted by the projection surface.

Conventionally, a flush toilet in which a continuous surface without a protruding surface is provided on an inner peripheral surface of an edge portion has been proposed (see patent document 2). The continuous surface is a surface which is continuous from the upper end inner edge portion of the toilet bowl portion to the outer peripheral end portion of the waste receiving surface without forming a protruding surface. Since the protruding surface that is difficult to wipe is not formed on the inner peripheral surface of the edge portion, good cleaning performance can be obtained.

In some cases, the inside of the toilet bowl is flushed with flush water, and the plurality of water flows are merged to amplify the water potential, thereby increasing the flushing capability of the flush water to the toilet bowl. In this way, when a plurality of water flows are merged, droplets are easily generated at the merged position. If there is no projection surface above the merging position, the spray may spill out of the toilet bowl, and therefore, a countermeasure is desired.

An object of the present disclosure is to provide a technique capable of suppressing spray generated at a position where a plurality of water flows merge from flying out of a toilet bowl.

One aspect of the present disclosure for solving the above problems is a flush toilet. A flush toilet of one mode includes: a bedpan part with a basin-shaped sewage receiving surface; an edge portion forming an upper end side portion of the bowl portion; a water discharge unit for discharging flush water into the bowl unit to form a swirling flow; an inner guide portion provided on a side surface portion of the bowl portion and guiding a part of the washing water colliding with the inner guide portion radially inward; the flush water guided by the inner guide merges with a revolving flow formed in the bowl portion on a radially inner side than an inner peripheral surface of the rim portion in a plan view.

In the above aspect, as compared with the case where all the washing water is guided by the inner guide, the flow rate of the washing water merged with the swirling flow can be reduced, and generation of droplets due to merging with the swirling flow can be suppressed. Therefore, even if the washing water guided by the inner guide merges with the revolving flow at a position where the projecting surface is not formed, the spray can be suppressed from flying out of the toilet bowl.

In the flush toilet of the second aspect, in addition to the first aspect, the water discharge portion may discharge flush water into the bowl portion through an opening formed in a side surface portion of the bowl portion. In this aspect, the opening is easily reached by the hand from the front side of the flush toilet, and a good cleaning performance is obtained, as compared with the case where the opening is formed in the rear portion of the bowl portion.

A flush toilet according to a third aspect may be arranged such that, in addition to the second aspect, a continuous surface that is continuous without forming a protruding surface from an upper end inner edge portion of the bowl portion to an outer peripheral end portion of the waste receiving surface is provided on an inner peripheral surface of the rim portion at a position other than the opening portion over an entire periphery of the bowl portion. In this aspect, the inner peripheral surface of the rim portion is easily wiped since the projecting surface that is difficult to reach by a hand during wiping is not provided in a wide range in the circumferential direction of the toilet bowl portion.

A flush toilet according to a fourth aspect is the flush toilet according to any one of the first to third aspects, further comprising a water conduit for guiding the flush water in a turning direction of the turning flow, wherein the water conduit has a curved surface portion constituting a lower inner corner portion of the water conduit, the curved surface portion has an increasing section in which a radius of curvature continuously increases as the curved surface portion moves in the turning direction, and the inner guide portion may constitute the increasing section. In this aspect, the inner guide portion can be formed on the bottom surface of the water conduit over a wide range without forming irregularities, and good appearance can be obtained.

In the flush toilet according to the fifth aspect, in addition to any one of the first to fourth aspects, the spiral flow may form a part of flush water discharged from the drain portion. In this manner, another drain portion may not be provided in order to form the swirling flow.

In the flush toilet according to the sixth aspect, in addition to any one of the first to fifth aspects, the inner guide portion may be provided in the vicinity of the drain port on a downstream side of the drain port of the drain portion. With this aspect, even when the flow rate of the washing water is small, a wide range in the toilet bowl can be washed.

From the viewpoint of reducing the trouble of cleaning the continuous surface of the edge portion, it is sometimes required to widen the range of the flushing range in which the flush water is generated in the vertical direction. The technique disclosed in patent document 2 is not designed particularly from the above-described viewpoint, and there is room for improvement.

An object of the present disclosure is to provide a technique capable of widening a washing range of a continuous surface of an edge portion in a vertical direction.

A first aspect of the present disclosure to solve the above problem is a flush toilet. A flush toilet of a first aspect includes: a bedpan part with a basin-shaped sewage receiving surface; an edge portion forming an upper end side portion of the bowl portion; a water discharge unit for discharging flush water into the bowl unit to form a swirling flow; the inner peripheral surface of the edge portion has: a first surface region provided on a side surface portion of the toilet bowl portion; a second surface region provided on at least one of the front surface and the rear surface of the bidet; the first surface region and the second surface region are each provided with a continuous surface that is continuous from an upper end inner edge portion of the bowl portion to an outer peripheral end portion of the dirt receiving surface without forming a protruding surface, and an inclination angle of the second surface region with respect to a vertical surface is made shallower than an inclination angle of the first surface region with respect to the vertical surface.

In the first aspect, the washing water subjected to the centrifugal force is likely to reach a larger vertical range in the second surface area than in the case where the inclination angles are the same in the first surface area and the second surface area. Accordingly, the flushing range of the continuous surface in the second surface region can be widened in the vertical direction.

Another aspect of the present disclosure for solving the aforementioned problems is a flush toilet. A flush toilet of another aspect includes: a bedpan part with a basin-shaped sewage receiving surface; an edge portion forming an upper end side portion of the bowl portion; a water discharge unit for discharging flush water into the bowl unit to form a swirling flow; the inner peripheral surface of the edge portion has, in a plan view: a curved first surface region having a radius of curvature within a first range; a curved second surface region having a radius of curvature larger than the radius of curvature of the first range; the first surface region and the second surface region are each provided with a continuous surface that is continuous from an upper end inner edge portion of the bowl portion to an outer peripheral end portion of the dirt receiving surface without forming a protruding surface, and an inclination angle of the second surface region with respect to a vertical surface is made shallower than an inclination angle of the first surface region with respect to the vertical surface.

In this way, the washing water subjected to the centrifugal force in the second surface area can easily reach a larger vertical range than in the case where the inclination angles are the same in the first surface area and the second surface area. Accordingly, the flushing range of the continuous surface in the second surface region can be widened in the vertical direction.

In the flush toilet of the second aspect, in addition to the first aspect, the water discharge portion may discharge flush water into the bowl portion through an opening formed in the first surface area. In this aspect, the opening is less conspicuous in a plan view than when the opening is formed in the second surface region, and thus a good appearance can be obtained.

A flush toilet according to a third aspect may be arranged such that, in addition to the second aspect, the continuous surface is provided on the inner peripheral surface of the rim portion at a position other than the opening portion over the entire periphery of the bowl portion. In this aspect, the inner peripheral surface of the rim portion is easily wiped since the projecting surface that is difficult to reach by a hand during wiping is not provided over a wide range in the circumferential direction of the toilet bowl portion.

In the flush toilet of the fourth aspect, in addition to any one of the first to third aspects, the second surface area may include: a second surface region provided on one side of the one surface portion; and a second face region on the other side of the other of the front and rear faces of the bidet. With this configuration, the range of flushing the front part of the toilet bowl which is easily soiled with urine can be widened. In addition, the range of flushing the rear surface of the toilet bowl portion, which is difficult to wipe, can be widened.

In the flush toilet according to the fifth aspect, in addition to any one of the first to fourth aspects, the swirling flow may pass through the one-side second surface area and then pass through the other-side second surface area, and the other-side second surface area may have a lower inclination angle with respect to a vertical plane than the one-side second surface area. When the spiral flow passes through the second surface area on the other side, the water potential of the spiral flow becomes weaker than when the spiral flow passes through the second surface area on one side. In this way, even when the swirling flow of weak water flows through the second surface area on the other side, the flush water can easily reach a large height range of the second surface area on the other side.

A flush toilet according to a sixth aspect is the flush toilet according to any one of the first to fifth aspects, further comprising a water conduit for receiving the flush water by a shelf surface and guiding the flush water in a turning direction of the turning flow, wherein an inner peripheral end portion of the shelf surface may be provided at a substantially bilaterally symmetrical position. In this aspect, even when the shape of the shelf surface or the like is asymmetrical to the left and right due to a manufacturing error or the like, it is easy to visually recognize the shape, and the work of inspecting the product can be facilitated.

A flush toilet according to a seventh aspect may be configured such that, in addition to any one of the first to sixth aspects, the flush toilet further includes a water guide path for receiving the flush water by a shelf surface connected to the second surface region in the direction of rotation from a front end or a rear end of the bowl portion provided on the one surface portion and guiding the flush water in the direction of rotation of the swirling flow. In this way, the washing water that has risen due to the centrifugal force and then has fallen is easily received by the rack surface while passing through the second surface region. Accordingly, most of the flush water passing through the second surface area passes through the water conduit to a remote location.

A flush toilet according to an eighth aspect of the present invention is the flush toilet according to the seventh aspect, wherein the waste receiving surface may have a concave curved surface portion provided on a front surface portion of the bowl portion, the concave curved surface portion being continuous from a lower end edge portion of the waste receiving surface to an outer peripheral end portion of the waste receiving surface at least at a left and right center portion of the bowl portion. In this aspect, the structure is such that the inner peripheral end portion of the convex curved frame surface is not provided at the left and right center portions of the bowl portion, and therefore, urine splash can be suppressed.

Description of the reference numerals

10 … flush toilet, 16 … bowl portion, 16a … upper end inner edge portion, 16B … one end portion, 16d … left and right central portion, 22B … rear surface portion, 22F … front surface portion, 22L … left side surface portion, 22R … right side surface portion, 22X … one surface portion, 24 … waste receiving surface, 24a … outer peripheral end portion, 24B … lower end edge portion, 26 … edge portion, 32 … opening portion, 40 … continuous surface, 42 … water discharge portion, 44 … water discharge port, 48 … water guide path, 50 … frame surface, 50a … inner peripheral end portion, 56 … concave curved surface portion, 58 … curved surface portion, 62 … increasing section, 66 … decreasing section, 70 … flushing water path, 72 … upper guide portion, 74 … inner side surface, 76 … protruding surface, 90 … first surface region, 92, 94 … second surface region.

Claims (25)

1. A flush toilet, comprising:

a bedpan part with a basin-shaped sewage receiving surface;

an edge portion forming an upper end side portion of the bowl portion;

a water discharge unit for discharging flush water into the bowl unit to form a swirling flow;

one of the front and rear surfaces of the bidet part is provided with one end in the front-rear direction of the bidet part,

the washing machine has an upper guide portion provided in a washing water path from the drain portion to the one end portion and guiding at least a part of the washing water upward.

2. The flush toilet according to claim 1,

the washing water guided upward by the upper guide forms a guide flow that flows downward after flowing upward on the washing water path.

3. The flush toilet according to claim 2,

the guide flow merges with the other water flow in the course of flowing downward, and flows upward by centrifugal force in the course of flowing along the one face portion together with the merged other water flow.

4. The flush toilet according to any one of claims 1 to 3,

the inner peripheral surface of the edge portion is provided with a continuous surface which is continuous from the upper end inner edge portion of the bowl portion to the outer peripheral end portion of the dirt receiving surface without forming a protruding surface on the one surface portion.

5. The flush toilet according to any one of claims 1 to 4,

the drain portion discharges flush water into the toilet bowl portion through an opening formed in a side surface portion of the toilet bowl portion.

6. The flush toilet according to claim 5,

a continuous surface which is continuous from the upper end inner edge portion of the bowl portion to the outer peripheral end portion of the waste receiving surface without forming a protruding surface is provided on the inner peripheral surface of the edge portion,

the continuous surface is provided on the inner peripheral surface of the edge portion over the entire periphery of the bowl portion at a position other than the opening portion.

7. The flush toilet according to any one of claims 1 to 6,

a water guide passage for guiding the washing water in a turning direction of the turning flow,

the water guide passage has a curved surface portion constituting a lower inside corner portion of the water guide passage,

the curved surface portion has an increasing section in which a radius of curvature continuously increases toward the turning direction,

the upper guide portion constitutes the increased section.

8. The flush toilet according to claim 7,

the curved surface portion has a decreasing section that is provided closer to the turning direction than the increasing section and that continuously decreases the radius of curvature toward the turning direction.

9. The flush toilet according to any one of claims 1 to 8,

has a projection surface which is contacted with the washing water guided upwards by the upper guide part from above.

10. The flush toilet according to claim 1,

in this flush toilet, at least a part of flush water is guided upward in a flush water path from the drain portion to the one end portion, thereby forming a guide flow that flows upward in the flush water path and then flows downward.

11. The flush toilet according to claim 1,

an inner guide part provided on a side surface part of the bowl part and guiding a part of the washing water colliding with the inner guide part radially inward,

the flush water guided by the inner guide merges with a revolving flow formed in the bowl portion on a radially inner side than an inner peripheral surface of the rim portion in a plan view.

12. The flush toilet according to claim 11,

the drain portion discharges flush water into the toilet bowl portion through an opening formed in a side surface portion of the toilet bowl portion.

13. The flush toilet according to claim 12,

the inner peripheral surface of the rim portion is provided with a continuous surface that extends over the entire periphery of the bowl portion, at a position other than the opening portion, from an upper end inner edge portion of the bowl portion to an outer peripheral end portion of the dirt receiving surface without forming a protruding surface.

14. The flush toilet according to any one of claims 11 to 13,

a water guide passage for guiding the washing water in a turning direction of the turning flow,

the water guide passage has a curved surface portion constituting a lower inside corner portion of the water guide passage,

the curved surface portion has an increasing section in which a radius of curvature continuously increases toward the turning direction,

the inner guide portion constitutes the increased section.

15. The flush toilet according to any one of claims 11 to 14,

the swirling flow forms a part of washing water discharged from the drain.

16. The flush toilet according to any one of claims 11 to 15,

the inner guide portion is provided in the vicinity of the drain opening of the drain portion on a downstream side of the drain opening.

17. The flush toilet according to claim 1,

the inner peripheral surface of the edge portion has: a first surface region provided on a side surface portion of the toilet bowl portion; a second surface region provided on at least one of the front surface and the rear surface of the bidet;

a continuous surface that is continuous from an upper end inner edge portion of the bowl portion to an outer peripheral end portion of the dirt receiving surface without forming a projection surface is provided in each of the first surface region and the second surface region,

the angle of inclination of the second surface region with respect to the vertical plane is gentler than the angle of inclination of the first surface region with respect to the vertical plane.

18. The flush toilet according to claim 17,

the drain unit discharges flush water into the toilet bowl through an opening formed in the first surface area.

19. The flush toilet according to claim 18,

the continuous surface is provided on the inner peripheral surface of the edge portion over the entire periphery of the bowl portion at a position other than the opening portion.

20. The flush toilet according to any one of claims 17 to 19,

the second surface region has: a second face area on one side of the one face portion, and a second face area on the other side of the other face portion of the front and rear face portions.

21. The flush toilet according to claim 20,

the rotational flow passes through the one-side second face region and then passes through the other-side second face region,

the second surface area on the other side has a gentle inclination angle with respect to a vertical plane compared to the second surface area on the one side.

22. The flush toilet according to any one of claims 17 to 21,

a water guide path for receiving the washing water by a shelf surface and guiding the washing water in a revolving direction of the revolving flow,

the inner peripheral end of the frame surface is provided at a substantially bilaterally symmetrical position.

23. The flush toilet according to any one of claims 17 to 22,

a water guide path for receiving the washing water by a shelf surface and guiding the washing water in a revolving direction of the revolving flow,

the frame surface faces the direction of rotation closer to the second surface region than the front end or the rear end of the bidet portion provided on the one face portion.

24. The flush toilet according to claim 23,

the filth receiving surface is provided with a concave curved surface part arranged on the front surface part of the bedpan part,

the concave curved surface portion is continuous from a lower end edge portion of the dirt receiving surface to an outer peripheral end portion of the dirt receiving surface at least at a left and right center portion of the bowl portion.

25. The flush toilet according to claim 1,

an inner peripheral surface of the edge portion has a curved first surface region having a radius of curvature within a first range in a plan view; a curved second surface region having a radius of curvature smaller than the radius of curvature of the first range;

a continuous surface which is continuous from an upper end inner edge portion of the bowl portion to an outer peripheral end portion of the dirt receiving surface without forming a projection surface is provided in each of the first surface region and the second surface region,

the angle of inclination of the second surface region with respect to the vertical plane is gentler than the angle of inclination of the first surface region with respect to the vertical plane.

Images