JP6411977B2 - Flush toilet - Google Patents

Description

  The present invention relates to a flush toilet bowl, and more particularly to a flush toilet bowl of the type that flushes a toilet bowl with a swirling water flow.

  In flush toilets, a cleaning method is known in which cleaning water is discharged from one or more water outlets to the toilet bowl, and filth is pushed out to a drain pipe by the force of the cleaning water. Hereinafter, the force that pushes filth out of the toilet bowl into the drain pipe is referred to as “discharge force”. Moreover, in order not to leave filth residue on the inner wall surface of the toilet bowl, a water flow for washing the inner wall surface of the toilet bowl over a wide range is also necessary. Hereinafter, the power to wash the toilet bowl inner wall is referred to as “cleaning power”.

  In recent years, functional units such as a local cleaning device and a hot air device are often attached to the rear of a flush toilet. In Patent Document 1, the nozzle is covered with a cover member that is substantially flush with the inner wall surface of the rear end of the toilet bowl in order to prevent the nozzle of the local cleaning device from becoming dirty. Although Patent Document 1 regards nozzle dirt as a problem, it seems that the dirt of the nozzle lid member is premised on the user's wiping and cleaning (see paragraph [0032] of Patent Document 1).

JP 2010-174451 A

  As described above, the flush toilet is required to have two functions of discharge power and cleaning power. This requires a design that can skillfully change the course without killing the momentum of the wash water. In addition, there is a demand for a structure that can accommodate mounting of functional units such as a local cleaning device.

  The main object of the present invention is to propose a new design for increasing the cleaning power and the discharging power in flush toilets.

A flush toilet in an aspect of the present invention is a toilet bowl, a water guide shelf formed in the circumferential direction on the inner wall surface of the toilet bowl, and having a high first shelf and a low second shelf, A first water outlet formed on the first shelf and a second water outlet formed on the second shelf and formed at a position lower than the first water outlet.
The first shelf and the second shelf are connected by a smooth shelf slope.

  According to the present invention, it becomes easy to increase the cleaning power and the discharging power in a flush toilet.

It is an external appearance perspective view of a flush toilet bowl. It is a top view of a flush toilet bowl. It is a sectional side view of a toilet bowl. It is a front sectional view of a toilet bowl. It is a schematic diagram which shows the water flow with respect to a storage area | region. It is a figure which shows typically the height relationship of the 1st shelf part and the 2nd shelf part in this embodiment. It is a figure which shows typically the height relationship of the 1st shelf part and the 2nd shelf part in a comparative example.

FIG. 1 is an external perspective view of a flush toilet 100. FIG.
A toilet bowl 106 is formed on the main body 144 of the flush toilet 100. In addition, the main body 144 discharges cleaning water stored in an external tank from the first water outlet 102 and the second water outlet 104 to the toilet bowl 106. A part of the cleaning water is also discharged from the third water outlet, which will be described later with reference to FIG. The third water outlet may be a so-called jet water outlet. The first water discharge port 102 is formed on the side surface (y-axis negative direction side) of the toilet bowl 106. The second water discharge port 104 is formed on the rear end surface (x-axis negative direction side) of the toilet bowl 106. A water guide shelf 108 is formed in an annular shape around the inner wall of the toilet bowl 106. Wash water discharged from the second water outlet 104 (hereinafter referred to as “second wash water”) flows on the water guide shelf 108, and most of the water falls into the toilet bowl 106 in front of the first water outlet 102. However, the remainder merges with cleaning water discharged from the first water outlet 102 (hereinafter referred to as “first cleaning water”). The first washing water swirls on the water guide shelf 108 to wash the entire toilet bowl 106, particularly the front surface and both side surfaces of the inner wall.

  The upper surface of the toilet bowl 106 is formed as a stepped surface having a first upper surface 110 at a high position and a second upper surface 112 at a low position. In the present embodiment, the second top surface 112 forms a flat bottom surface of the recess 138 with respect to the top surface. The second upper surface 112 is not necessarily flat, and may be formed as a surface that curves downward or upward, or a protrusion or a cutout may be formed on a part of the second upper surface 112. A functional unit (not shown) that provides a local cleaning function, a hot air function, or the like is placed in the recess 138 (upper part of the second upper surface 112). The second upper surface 112 and the first upper surface 110 are smoothly connected by the two upper surface inclined surfaces 140a and 140b to form an annular upper surface having a height difference.

  The water guide shelf 108 includes a first shelf 114 at a high position and a second shelf 116 at a low position. The first shelf 114 is formed at a position corresponding to the first upper surface 110, and the second shelf 116 is formed at a position corresponding to the second upper surface 112. Here, “corresponding position” means that it corresponds in the vertical direction (z-axis direction), in other words, that it is in a position that overlaps in plan view. More specifically, the first shelf 114 (high shelf) is formed so as to correspond to 90% or more of the inner circumference of the first upper surface 110 (high surface), and the second shelf 112 (low surface) This means that the second shelf 116 (low shelf) is formed so as to correspond to 90% or more of the circumference (see also FIG. 2). As apparent from FIG. 2, the first shelf 114 is longer than the second shelf 116.

  Corresponding to the height difference (step) between the first upper surface 110 and the second upper surface 112 in the upper surface portion, the first shelf portion 114 and the second shelf portion 116 are also provided with a height difference in the water guiding shelf 108. The first shelf 114 and the second shelf 116 are connected by a smooth slope (shelf slope 120a) (described in more detail in connection with FIG. 2). “Smooth” in the present specification means that each surface is connected continuously, in other words, without having a discontinuous surface.

  In the toilet bowl 106, the upper surface (the first upper surface 110, the second upper surface 112, the upper surface slopes 140a and 140b) protrudes inward, so that an overhang 118 (rim return) is formed over the entire circumference. The overhang 118 is, so to speak, a roof with respect to the water guide shelf 108, and a water passage is formed by the water guide shelf 108 and the overhang 118. The overhang 118 in the present embodiment is formed in an annular shape over the entire inner periphery of the toilet bowl 106. Although details will be described later, the water guide shelf 108 forms a substantially parallel surface with the overhang 118 mainly in the horizontal direction (water flow direction) except for a part. More specifically, the lower surface of the overhang 118 (the surface facing the water guide shelf 108) is substantially parallel to the upper surface of the water guide shelf 108 in the water flow direction.

FIG. 2 is a top view of the flush toilet 100. FIG. FIG. 3 is a side sectional view of the toilet bowl 106. FIG. 4 is a front sectional view of the toilet bowl 106. FIG. 5 is a schematic diagram showing a water flow with respect to the storage region 122.
The water guide shelf 108 is an annular shelf formed on the entire inner wall surface of the toilet bowl 106. The first shelf 114 and the second shelf 116 are smoothly connected by the shelf slope 120a and the shelf slope 120b. Both the shelf slope 120a and the shelf slope 120b are within the rear half of the inner peripheral surface of the toilet bowl 106 in plan view (in the negative z-axis direction in FIG. 2). Although details will be described later, the shelf slope 120a is a slope on which the second wash water rises, and the shelf slope 120b is a slope on which the first wash water descends. The shelf slope 120a and the shelf slope 120b are positioned symmetrically with respect to the central axis M (x-axis direction in FIG. 2) of the toilet bowl 106. The first shelf 114 and the second shelf 116 may both be horizontally extending shelves, but the first shelf 114 is gently raised near the front end as shown in FIG. Also good. Also in this case, the shelf slopes 120 a and 120 b are formed to be steeper than the slope of the first shelf 114. The first shelf 114 extends horizontally.
In summary, the water guide shelf 108 is axisymmetric with respect to the central axis M, and is an annular shelf having a height difference in which the first shelf 114 and the second shelf 116 are smoothly connected by the shelf slopes 120a and 120b. .

The overhang 118 is formed around the rim of the toilet bowl 106. The overhang 118 includes a first overhang 130 formed at a high position corresponding to the first upper surface 110 and a second overhang 132 formed at a low position corresponding to the second upper surface 112. The first overhang 130 and the second overhang 132 are smoothly connected by the slope overhangs 134a and 134b. The slope overhang 134a corresponds to the top slope 140a and the shelf slope 120a, and the slope overhang 134b corresponds to the top slope 140b and the shelf slope 120b. Therefore, the slope overhang 134a and the slope overhang 134b are also accommodated in the half on the rear end side of the inner peripheral surface of the toilet bowl 106 in a plan view (in the z-axis negative direction in FIG. 2). The slope overhang 134a and the slope overhang 134b are positioned symmetrically with respect to the central axis M (the x-axis direction in FIG. 2) of the toilet bowl 106.
In summary, the overhang 118 is axisymmetric with respect to the central axis M, and the first overhang 130 and the second overhang 132 are smoothly connected by the slope overhangs 134a and 134b. (Rim return).

  Since both the overhang 118 and the water guide shelf 108 in this embodiment are formed so as to be symmetric with respect to the central axis M, the design of the flush toilet 100 as a whole is easy to maintain.

  The second water discharge port 104 is formed on the shelf slope 120 b side on the right side of the rear end of the second shelf portion 116. The first water outlet 102 is formed on the first shelf 114.

  Most of the wash water that has flowed into the toilet bowl 106 from the first water outlet 102 or the first water outlet 102 is discharged from the discharge port 128 of the storage region 122 to a sewer pipe (not shown), but a part is stored. The toilet bowl 106 and the sewer pipe are sealed by being stored in the region 122. A third water outlet 124 is further formed on the side surface of the storage region 122. A part of the wash water supplied from the tank of the flush toilet 100 is discharged from the first spout 102 as the first wash water S1 (course C1), and a part is second from the second spout 104 (course C2). It is discharged as cleaning water S2, and the rest is discharged as “third cleaning water S3” from the third water outlet 124 (course C3). Each of the courses C1 to C3 shows the main flow of washing water from each water outlet. The filth collected in the storage region 122 by the first cleaning water S1 and the second cleaning water S2 is pushed out to the discharge port 128 at the back of the storage region 122 by the third cleaning water S3.

  The first water outlet 102 is formed in the upper part (rim) of the left side surface (y-axis negative direction side) toward the flush toilet 100. The first wash water S1 discharged from the first water outlet 102 swirls over the water guide shelf 108 (first shelf 114) in a counterclockwise direction, and the front surface and both side surfaces of the inner wall surface of the toilet bowl 106. Clean the area. The first washing water S1 turns off the first shelf 114, loses kinetic energy before reaching the shelf slope 120b, goes off the course, and falls into the storage region 122 (see S1 in FIG. 2).

The second washing water S2 discharged from the second water outlet 104 locally washes the upper rear end surface of the toilet bowl 106 by passing through the water guiding shelf 108 (second shelf 116), and the rising slope of the shelf slope 120a. The course goes out due to the difference in height and falls into the storage area 122 (see S2 in FIG. 2).
The shelf slope 120a is located on the rear side of the opening R (see FIG. 3) of the storage region 122. More specifically, when the midpoint in the x direction (front-rear direction) of the opening R is P, the shelf slope 120a is formed at a position that falls within the rear end side and the left side of the midpoint P in plan view. For this reason, after the 2nd wash water S2 climbs the shelf slope 120a, it flows into the storage area | region 122, after flowing through the side of the receiving surface 142 (refer also FIG. 2). As shown also in FIG. 3, most of the second shelf 116 and the first shelf 114 are both formed in the horizontal direction.
In the present embodiment, the first shelf 114 is formed at a position higher than the second upper surface 112 of the recess 138 (see FIG. 4).

  A part of the second washing water S2 may join the first washing water S1 without dropping, but it is desirable that the main flow falls without joining the first washing water S1. The “main flow” here means 60% or more, preferably 80% or more, more preferably 95% or more of the total amount of the second wash water S2 discharged from the second water discharge port 104. Of the total amount of the second wash water S2, the ratio of the water flow falling without joining the first wash water S1 is the position and size of the second spout 104, the flow rate of the second wash water S2, the shelf slope 120a. Simulation calculation is possible based on various parameters such as shape and rising angle.

  The first washing water S1 provides a wide range of washing power and drainage power by turning from the right side after turning the inner wall of the toilet bowl 106. The second washing water S2 provides local cleaning power and drainage power to the rear end surface by washing the rear end surface of the toilet bowl 106 that is particularly dirty and then dropping from the left end of the rear end. The third wash water S3 provides a discharge force by stirring the storage region 122 and pushing out filth to the discharge port 128.

  As shown in FIG. 5, filth 126 is collected in the storage area 122. Some of them are floating in the stored water, such as the filth 126a to 126c, and some are settled like the filth 126a. The first wash water S1 and the second wash water S2 fall into the storage area 122 from different directions, and the filths 126a to 126c are submerged in the storage area 122. The third washing water S3 collectively pushes the filths 126a to 126d collected at the bottom of the storage region 122 to the discharge port 128. Hereinafter, the force that sinks the filth 126 in the storage area 122 is referred to as “sinking force”. In order to surely sink the floating filth 126, it is desirable that a certain amount of washing water is dropped from a sufficient height.

  In the case of FIG. 5, the sinking force of the first cleaning water S1 is applied to the filths 126a and 126b. However, the filth 126c is not directly below the first cleaning water S1, and thus is not easily subjected to the sinking force by the first cleaning water S1. However, since the filth 126c is directly under the second wash water S2, it receives a sinking force due to the second wash water S2. In the present embodiment, the first wash water S1 and the second wash water S2 fall from the left and right directions, so that the sinking force can be effectively provided for the filth 126 that floats.

  Returning to FIG. Most of the second washing water S2 falls after washing the rear end face of the toilet bowl 106, and during or after climbing the shelf slope 120a. In general, in order to change the water flow direction in the toilet bowl 106, the shape of the inner wall surface of the toilet bowl 106, in particular, the curvature in plan view (xy plane) of the water passage is often changed. However, it is difficult to design the water flow direction to be greatly changed by changing the curvature on the xy plane. On the other hand, in the present embodiment, the water flow direction is changed by the inclination in the vertical direction (z direction) of the shelf slope 120a. Since it is relatively easy to change the angle of the shelf slope 120a, it is easy to design for water flow control.

  The second cleaning water S2 may be dropped by colliding the second cleaning water S2 after rising the shelf slope 120a with the back surface of the overhang 118 (which will be described in more detail with reference to FIG. 6). For that purpose, it is desirable to form the overhang 118 so that the second washing water S2 protrudes particularly large at the point where the second washing water S2 rises up the shelf slope 120a and enters the first shelf 114. Since the second wash water S2 that has not fallen down joins the first wash water S1, the second wash water S2 can be used efficiently without waste.

FIG. 6 is a diagram schematically showing the elevation relationship between the first shelf 114 and the second shelf 116 in the present embodiment. FIG. 7 is a diagram schematically showing the height relationship between the first shelf 114 and the second shelf 116 in the comparative example.
The difference between FIG. 6 and FIG. 7 is whether or not the shelf slope 120 a is parallel to the overhang 118 near the second shelf 116.

  The height of the second shelf 116 when the floor surface (installation surface) of the flush toilet 100 is used as a reference is H2, and the height of the first shelf 114 is H1. In the overhang 118, the height of the back surface of the second overhang 132 corresponding to the second upper surface 112 is H3, and the height of the back surface of the first overhang 130 corresponding to the first upper surface 110 is H4. The height of the second upper surface 112 (the upper surface of the second overhang 132) is H5, and the height of the first upper surface 110 (the upper surface of the first overhang 130) is H6.

  The height of the water passage formed between the second shelf 116 and the second overhang 132 is T2 (= H3-H2). Moreover, let the height of the water flow path formed between the 1st shelf part 114 and the 1st overhang 130 be T1 (= H4-H1).

  A boundary point between the second shelf 116 and the shelf slope 120a is P1, a boundary point between the shelf slope 120a and the first shelf 114 is P3, and an intermediate point between P1 and P3 is P2. Moreover, the position of the 1st water outlet 102 is set to P4.

  The second wash water S2 discharged from the second water discharge port 104 passes through the second shelf 116, climbs the shelf slope 120a, and falls toward the storage region 122 while rotating by losing kinetic energy. The second wash water S <b> 2 may collide with the back surface of the first overhang 130 and be bounced back toward the storage area 122. Therefore, it is desirable that an overhang 118 having a sufficiently large size be formed at least at a point where the second cleaning water S2 that has passed through the shelf slope 120a moves up the shelf slope 120a and enters the first shelf 114. More specifically, it is desirable that the first overhang 130 is formed at least in the sections P3 to P4.

  The shelf slope 120a and the slope overhang 134a are at least partially parallel in the water flow direction. More specifically, at least in the sections P1 to P2, the shelf slope 120a and the back surface of the overhang 118 (slope overhang 134a) thereover are substantially parallel. Here, “substantially parallel” means that the difference between the rising angle of the shelf slope 120a and the rising angle of the slope overhang 134a is within 5%, preferably within 1%. In the present specification, “substantially parallel” means that the difference between the surface angles of the two surfaces is within 5%, preferably within 1%. As shown in the comparative example of FIG. 7, when the rising angle of the slope overhang 134a is steeper than the rising angle of the shelf slope 120a, a blind spot area 136 (an unwashed area) is formed below the slope overhang 134a. , There is a possibility that this can not be cleaned sufficiently. According to the experiments by the present inventors, when the second cleaning water S2 is diffused up and down after passing through P1 when formed as in the comparative example of FIG. 7, it reaches the back surface of the overhang 118 in the vicinity of P3. It was found that a sufficient amount of the second washing water S2 was difficult to reach. As shown in FIG. 6, it is possible to prevent the formation of the blind spot area 136 by making the shelf slope 120a and the slope overhang 134a substantially parallel in the sections P1 to P2.

  In the sections P1 to P2, the shelf slope 120a is substantially parallel to the upper slope 140a as well as the slope overhang 134a in the water flow direction.

  Since the shelf slope 120a is smoothly connected to the second shelf portion 116, the second washing water can be smoothly guided to the shelf slope 120a while maintaining the water flow.

  The second wash water that has climbed the shelf slope 120a partially falls after passing P3, and a part of the second wash water collides with the back surface of the first overhang 130 and is bounced back. For this reason, the shelf slope 120a needs a certain angle. It is desirable that the shelf slope 120a includes an inclined surface of 10 degrees or more, preferably 35 degrees or more.

  In the sections P1 to P2, the shelf slope 120a and the slope overhang 134a are substantially parallel to the slope direction. Similarly, the second shelf 116 and the second overhang 132 are substantially parallel to the horizontal direction, and the first shelf 114 and the first overhang 130 are substantially parallel to the horizontal direction. The same applies to the shelf slope 120b and the slope overhang 134b. Both the water guide shelf 108 and the overhang 118 are formed in an annular shape on the entire circumference of the toilet bowl 106, but the overhang 118 and the water guide shelf in the section of 80% or more, preferably 90% or more of the whole circumference of the water guide shelf 108. It is desirable that 108 is substantially parallel. Alternatively, the upper surface (first upper surface 110, second upper surface 112, upper surface inclined surface 140a, upper surface inclined surface 140b) and the water guiding shelf 108 are substantially parallel in a section of 80% or more, preferably 90% or more of the entire circumference of the water guiding shelf 108. It is desirable to be. By forming the water guide shelf 108 so that the overhang 118 and the water guide shelf 108 or the upper surface and the water guide shelf 108 are substantially parallel to each other, the overall harmony of the design of the flush toilet 100 can be enhanced.

  Compared with the height difference D1 (= H6−H5) between the first upper surface 110 and the second upper surface 112, the height difference D2 (= H1−H2) between the first shelf portion 114 and the second shelf portion 116 is small. This is because the water passage height T2 (= H3-H2) in the second shelf 116 is lower than the water passage height T1 (= H4-H1) in the first shelf 114. As described above, the height difference D2 of the water guide shelf 108 is slightly relaxed compared to the height difference D1 between the first upper surface 110 and the second upper surface 112.

  In order to match the height difference D1 and the height difference D2, the second shelf 116 may be formed at a position lower than H2 in FIG. However, in this case, the potential energy of the second cleaning water becomes small. Moreover, since the direction which narrowed the water flow path of the 2nd shelf part 116 can raise the pressure of 2nd washing water, a rear-end surface can be wash | cleaned strongly.

  In order to make the height difference D1 and the height difference D2 coincide with each other, the first shelf 114 may be formed at a position higher than H1 in FIG. However, in this case, since the height T1 becomes narrow, the opening of the first water outlet 102 becomes small, and the amount of water discharged from the first water outlet 102 becomes small. Since it is necessary to provide sufficient first wash water S1 to the long first shelf 114, and in particular, it is necessary to provide a sufficient amount of water to the front end portion of the toilet bowl 106, the discharge of the first spout 102 is required. It is not preferable to add structural restrictions to the amount of water.

  Therefore, in this embodiment, by providing the height difference D2 between the first shelf 114 and the second shelf 116, the height difference D1 between the first upper surface 110 and the second upper surface 112 can be accommodated, and T2 <T1. The water guide shelf 108 is formed so as to satisfy (D2 <D1). Such a configuration balances cleanliness and design harmony.

  In the present embodiment, the height T2 of the water passage of the second shelf 116 is lower than the height T1 of the water passage of the first shelf 114. It is desirable that at least the average height of the water passage of the second shelf 116 is lower than the average height of the water passage of the first shelf 114.

  In the sections P1 to P4, the vertical width of the water passage is expanded from T2 to T1. In this embodiment, the vertical width of the water passage is maintained at T2 in the sections P1 to P2, and the vertical width is expanded from T2 to T1 in the sections P2 to P3. At least in the sections P1 to P4, the vertical width of the water passage should be enlarged. However, if the vertical width of the water passage is maintained at T2 in the sections P1 to P2, it is more preferable because the blind spot area 136 (unwashed area) is less likely to occur as described above.

  The toilet bowl 106 is particularly susceptible to dirt on the rear end surface. It is better to run the wash water at a flow rate as high as possible in a place that is easily contaminated. Since the sections P2 to P3 are more difficult to get dirty than the sections P1 to P2, it is preferable to increase the vertical width of the water passage in the sections P2 to P3 rather than the sections P1 to P2.

  The second wash water S2 discharged from the second water discharge port 104 ascends the shelf slope 120a, passes through P2, and diffuses in the vertical direction in the sections P2 to P3. A part of the water falls and a part collides with the back surface of the first overhang 130 and falls.

  The overhang 118 forms a water passage and prevents filth and washing water from splashing on the first upper surface 110 and the second upper surface 112. In particular, the second overhang 132 prevents scattering of filth and cleaning water to the functional unit placed on the second upper surface 112. The dirt scattered on the rear end surface is prevented from scattering upward by the back surface of the second overhang 132, and the back surface of the second overhang 132 is washed away with the second washing water S2.

  In the present embodiment, the course of the wash water is changed (out of course) in the direction of the fall of the second wash water S2 by the vertical inclination of the shelf slope 120a. If the shelf slope 120a and the overhang 118 are combined, the direction of the water flow can be changed more easily and efficiently.

  In the present embodiment, even when a recess (second upper surface 112) is formed at the rear end portion of the flush toilet 100, the design constraint of the water guide shelf 108 due to the presence of the recess can be used rather positively. Depending on the height difference of the water guiding shelf 108, the speed of the cleaning water can be increased or decreased, or the cleaning water can be actively out of the water guiding shelf 108.

  The first washing water S1 turns on the first shelf 114 while maintaining the potential energy. Then, the course goes out before the shelf slope 120 b and falls into the storage region 122.

  The second cleaning water S2 passes through a narrow water passage on the second shelf 116 at a high speed, thereby cleaning the rear end surface and ascending the shelf slope 120a. Further, a part of the second washing water S <b> 2 jumping out from the shelf slope 120 a is strongly bounced back to the storage region 122 by the overhang 118.

  Thus, in this embodiment, the 2nd wash water S2 is made to go out of course in the falling direction by the height difference in the shelf slope 120a. A part of the first wash water S1 may join the second wash water S2 after passing through the shelf slope 120b. However, when the first wash water S1 circulated around the toilet bowl 106 is combined with the second wash water S2, the second wash water S2 is slowed down. It is desirable that the ratio of merging with water S2 is less than 20%, preferably less than 10%.

  The present invention has been described based on some embodiments. Those skilled in the art will understand that these embodiments are examples, and that various modifications and changes are possible within the scope of the claims of the present invention, and that such modifications and changes are also within the scope of the claims of the present invention. It is where it is done. Accordingly, the description and drawings herein are to be regarded as illustrative rather than restrictive.

  In the present embodiment, a recess is formed in order to mount a functional part at the rear end of the flush toilet 100, and a step surface such as a first upper surface 110 and a second upper surface 112 is provided for this purpose. The present invention can be applied to a design in the case where the water guide shelf 108 is formed corresponding to the upper surface step without being limited to the concave portion. The width of the water guide shelf 108 does not need to be constant, and may vary depending on the location. The water guide shelf 108 does not need to be horizontal, and may be inclined or curved with respect to a horizontal plane. Moreover, the water guide shelf 108 does not need to go around the entire circumference of the toilet bowl 106 one by one, and may have a partial discontinuous region (such as a lack).

The following invention is recognized from the above description.
A flush toilet in an aspect of the present invention is formed in a circumferential direction on a main body part in which a toilet bowl part is formed and an inner wall surface of the toilet bowl part, and a first shelf part at a high position and a second shelf part at a low position. A first water outlet formed to discharge water to the first shelf, a second water outlet formed to discharge water to the second shelf, and formed at a position lower than the first water outlet. A water outlet.
The first shelf and the second shelf may be connected by a smooth shelf slope.
By connecting the first shelf and the second shelf with a smooth shelf slope, the wash water can be guided in the falling direction by the difference in the height of the shelf slope while maintaining the water flow of the wash water.

  An overhang portion may be formed on the upper surface of the toilet bowl at a point where at least the wash water that has passed through the second shelf rises up the shelf slope and enters the first shelf.

A storage area for storing wash water may be formed at the bottom of the toilet bowl. The main stream of water discharged from the second water outlet may fall into the storage area without joining the water discharged from the first water outlet in the first shelf.
It becomes easy to strengthen discharge power by dropping the main stream of the water discharged from the second water outlet before joining the water discharged from the first water outlet.

  Of the water discharged from the second water outlet, the amount of water that rises up the shelf slope and joins the water discharged from the first water outlet may be less than 20% of the total water amount.

  The shelf slope where the water discharged from the second water outlet rises may have an inclined surface of 10 degrees or more.

  The water guide shelf may be formed in an annular shape over the entire circumference of the toilet bowl portion by connecting the first shelf portion and the second shelf portion by two shelf slopes. Both of these two shelf slopes may be formed on the rear half portion side of the toilet bowl in plan view.

The first shelf may be longer than the second shelf.
By shortening the second shelf, it becomes easy to climb the wash water powerfully while maintaining the kinetic energy of the wash water at the second water outlet. The main stream of the wash water at the second water outlet falls, but the wash water that has escaped the water merges with the wash water at the first water outlet.

The shelf slope where the wash water that has passed through the second shelf rises toward the first shelf may be formed on the side of the storage area formed at the bottom of the toilet bowl in plan view.
By forming the rising shelf slope on the side of the storage area, it becomes easy to guide the falling water from the shelf slope and the first shelf part ahead of the shelf slope to the storage area.

The flush toilet bowl according to another aspect of the present invention has a toilet bowl portion, a main body portion having a first upper surface at a high position and a second upper surface at a low position, and an inner wall surface of the toilet bowl portion. A water guide shelf formed in the direction and a water outlet formed to discharge water to the water guide shelf are provided.
The water guide shelf has a first shelf formed at a position corresponding to the first upper surface and a second shelf formed at a position corresponding to the second upper surface. The second shelf is formed at a lower position than the first shelf.
Corresponding to the height difference of the upper surface, the water guide shelf is also provided with a height difference, and the water flow can be controlled by the height difference of the water guide shelf.

The second shelf may be connected to the first shelf by a smooth shelf slope.
By smoothly connecting the first shelf and the second shelf, it is easy to maintain the water flow of the cleaning water.

The first upper surface and the second upper surface may be connected by a smooth upper surface slope. And at least in the section from the boundary point of the second shelf part and the shelf slope to the central point of the shelf slope, the shelf slope may be a slope substantially parallel to the top slope.
By making the shelf slope parallel to the top slope, it becomes easier to maintain harmony in the overall design.

  An overhang portion protruding to the inside may be further formed on the upper surface slope of the toilet bowl portion. In at least a section from the boundary point between the second shelf and the shelf slope to the center point of the shelf slope, the shelf slope may be a slope substantially parallel to the overhang portion.

  A first water outlet and a second water outlet may be formed in the toilet bowl portion. The first water outlet may be formed to discharge water to the first shelf, and the second water outlet may be formed to discharge water to the second shelf.

A first water outlet and a second water outlet may be formed at the upper end of the inner wall of the toilet bowl. The first water outlet may be formed on the first shelf, and the second water outlet may be formed on the second shelf. In the range from the boundary point between the second shelf and the shelf slope to the first water outlet, the interval between the water guide shelf and the upper surface may be increased.
By making the height difference between the first shelf and the second shelf lower than the height difference between the first upper surface and the second upper surface, it becomes easy to maintain harmony of the entire design.

  A first water outlet and a second water outlet may be formed at the upper end of the inner wall of the toilet bowl. And a 1st spout may be formed in a 1st shelf part, and a 2nd spout may be formed in a 2nd shelf part.

  An overhang portion that protrudes inward may be further formed on the upper surface of the toilet bowl portion over the entire circumference. The water guide shelf may be formed in an annular shape over the entire circumference of the toilet bowl portion, and may be formed substantially parallel to the overhang portion in at least 80% or more of the entire circumference.

  The average interval between the first shelf and the first upper surface may be larger than the average interval between the second shelf and the second upper surface.

  In the range from the boundary point between the second shelf and the shelf slope to the first water outlet formed in the toilet bowl, the distance between the water guide shelf and the upper surface may be increased.

  A recessed part may be formed in the upper surface rear end part of the toilet bowl part. The second top surface may correspond to the bottom surface of the recess.

  DESCRIPTION OF SYMBOLS 100 Flush toilet bowl, 102 1st water outlet, 104 2nd water outlet, 106 Toilet bowl, 108 Water conveyance shelf, 110 1st upper surface, 112 2nd upper surface, 114 1st shelf part, 116 2nd shelf part, 118 Overhang , 120 shelf slope, 122 storage area, 124 third outlet, 126 filth, 128 outlet, 130 first overhang, 132 second overhang, 134 slope overhang, 136 blind spot area.

Claims (8)

A body part in which a toilet bowl is formed;
A water guide shelf formed in the circumferential direction on the inner wall surface of the toilet bowl, and having a first shelf portion at a high position and a second shelf portion at a low position;
A first water outlet formed to discharge water to the first shelf;
A second water discharge port formed to discharge water to the second shelf and formed at a position lower than the first water discharge port,
The flush toilet, wherein the first shelf and the second shelf are connected by a smooth shelf slope.   The overhanging part is formed on the upper surface of the toilet bowl part at a point where at least the washing water that has passed through the second shelf part ascends the shelf slope and enters the first shelf part. The flush toilet bowl according to Item 1. A storage area for storing wash water is formed at the bottom of the toilet bowl,
3. The main flow of water discharged from the second water discharge port falls into the storage area without joining the water discharged from the first water discharge port in the first shelf portion. Flush toilet.   The amount of water that rises up the shelf slope and joins the water discharged from the first water outlet out of the water discharged from the second water outlet is less than 20% of the total water amount. A flush toilet according to any one of the above.   The flush toilet according to any one of claims 1 to 4, wherein the shelf slope from which water discharged from the second water outlet rises has an inclination angle of 10 degrees or more. The water guide shelf is formed in an annular shape over the entire circumference of the toilet bowl by connecting the first shelf and the second shelf by two shelf slopes,
2. The flush toilet bowl according to claim 1, wherein each of the two shelf slopes is formed on a rear half portion side in a plan view of the toilet bowl portion.   The flush toilet according to any one of claims 1 to 6, wherein the first shelf is longer than the second shelf.   The shelf slope in which the wash water that has passed through the second shelf rises toward the first shelf is formed on the side of the storage region formed at the bottom of the toilet bowl in plan view. The flush toilet according to any one of claims 1 to 7.

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