JP6789101B2 - Flush toilet - Google Patents

Description

The present invention relates to a flush toilet.

Patent Document 1 describes a pot surface portion (dirt receiving surface), a toilet bowl (bowl portion) having a recess formed below the pot surface portion and connected to a drain pipe, and a spout for discharging washing water into the toilet bowl. A flush toilet equipped with (rim spout) is disclosed. Further, this flush toilet is provided with a spout (Zet spout) for directly discharging the wash water into the recess. The washing water discharged from the rim spout cleans the pot surface and flows into the recess along the surface of the pot surface. Further, the washing water discharged from the Zet spout forms a swirling flow that winds upward from the bottom wall along the surface of the recess.

Japanese Unexamined Patent Publication No. 2013-194410

In the case of a flush toilet as described above, a water flow in which the washing water flows into the recess from above along the surface of the pot surface and a water flow in which the washing water swirls in the recess in the vertical direction are generated. There was a risk that the water streams would collide with each other in the recess. In this case, the water force of each water stream is weakened, and there arises a problem that filth cannot be sufficiently discharged.

The present invention has been made in view of the above-mentioned conventional circumstances, and solves the problem of providing a flush toilet that can suppress a decrease in the water force of the washing water and effectively exhibit the filth discharge performance. It is an issue to be addressed.

The flush toilet of the present invention
A toilet bowl having a recess formed on the pot surface and below the pot surface and connected to the drain pipe, and
A spout that discharges wash water into the toilet bowl,
Is equipped with
The washing water flows in the first water flow from the front part of the toilet bowl into the recess, and flows into the recess from the rear part of the toilet bowl and rises in front of the recess to rotate in the vertical direction in the recess. At least two water streams with the second water stream flow into the recess,
A step portion having a step in the vertical direction is formed in the region of the pot surface portion where the first water flow flows down.

In this flush toilet, the first water flow flows from the front part of the toilet bowl into the recess, and the second water flow flows from the rear part of the toilet bowl into the recess and rises in front of the recess to rotate vertically in the recess. .. Further, the first water flow forms a flow away from the surface of the pot surface portion by passing through the step portion. As a result, when the two water streams merge in the recess, a collision in front of each other in the traveling direction is avoided, so that a decrease in water force can be suppressed.

Therefore, the flush toilet of the present invention can suppress a decrease in the water force of the washing water and effectively exhibit the filth discharge performance.

It is a top view which shows the flush toilet of Example 1. FIG. It is a perspective view which shows the flush toilet of Example 1. FIG. FIG. 3 is a sectional view taken along line III-III of FIG. FIG. 1 is a sectional view taken along line IV-IV of FIG. It is a figure for demonstrating the operation of the flush toilet of Example 1. FIG. It is a figure for demonstrating the operation of the flush toilet of Example 1. FIG. It is a figure for demonstrating the operation of the flush toilet of Example 1. FIG. It is an enlarged view of the main part of FIG.

Preferred embodiments of the present invention will be described.

In the flush toilet bowl of the present invention, the step portion may be formed so as to extend horizontally along the surface of the pot surface portion. In this case, it is possible to reliably distribute the first water flow, which spreads horizontally along the surface of the pot surface portion and flows down, or the flow position is displaced due to variations in water force or the like, to the step portion.
The above-mentioned "horizontal direction" does not have to be strictly horizontal, and includes the diagonal vertical direction.

<Example 1>
Hereinafter, Example 1 embodying the present invention will be described with reference to FIGS. 1 to 8. In the following description, the lower side in FIG. 1 and the left side in FIG. 3 are defined as the front side in the front-rear direction. Regarding the left-right direction, the directions appearing in FIG. 1 are defined as the left side and the right side as they are. The flush toilet 1 of this embodiment includes a toilet bowl 10 and spouts 21 and 22.

As shown in FIGS. 1 to 3, the toilet bowl 10 has an elevation portion 11, a bowl surface portion 12, a shelf surface portion 13, and a recess 14. The elevation portion 11 is provided at the upper end portion of the toilet bowl 10, and its surface is formed so as to extend in the vertical direction. The elevation portion 11 is formed over substantially the entire circumference of the upper end portion of the toilet bowl 10. The elevation portion 11 is formed in an annular shape that is slightly long in the front-rear direction in a plan view, and has an egg shape in which the curvature of the front portion is larger than the curvature of the rear portion. Further, the upper end surface of the elevation portion 11 extends substantially horizontally in the outward direction at a substantially constant height. As described above, the flush toilet 1 is a toilet without an overhang portion that projects inward from the upper end of the elevation portion 11.

The pot surface portion 12 is formed in a mortar shape below the inner peripheral side of the lower end of the elevation portion 11. The pot surface portion 12 is formed so as to be inclined so as to be lowered toward the rear side of the center. The shelf surface portion 13 is provided between the elevation portion 11 and the pot surface portion 12 so as to connect the lower end of the elevation portion 11 and the upper end of the pot surface portion 12. The surface of the shelf surface portion 13 faces upward, and the shelf surface portion 13 extends so as to be slightly downwardly inclined toward the inside. The shelf surface portion 13 is provided on the peripheral edge of the toilet bowl 10 except for a part in the front portion, and has a substantially horseshoe shape in a plan view. The recess 14 is formed below the pot surface portion 12 and is connected to the drain pipe 30. The recess 14 is continuously provided at the lower end of the pot surface portion 12. The recess 14 is arranged near the rear of the toilet bowl 10 at a substantially center in the left-right direction. A pool of washing water is formed in the recess 14.

The water spouts 21 and 22 are open to the elevation portion 11 of the toilet bowl 10, and the washing water is discharged into the toilet bowl 10. In this embodiment, the spouts 21 and 22 are provided with two spouts 21, a first spout 21 and a second spout 22. The two spouts 21 and 22 discharge wash water into the toilet bowl 10, respectively. The discharged wash water circulates while swirling counterclockwise on the shelf surface portion 13 and the pot surface portion 12 in the toilet bowl 10, flows into the recess 14, and is discharged to the drain pipe 30.

Specifically, the first spout 21 is provided so as to open to the rear left side of the toilet bowl 10. The washing water discharged from the first spout 21 is discharged forward onto the shelf surface portion 13, and a part of the washing water is a part of the mainstream F1 described later that flows around the periphery of the toilet bowl 10 along the elevation portion 11. The other part becomes a part of the later-described diversion F2 that flows down from the shelf surface portion 13 to the pot surface portion 12 side, and the other part becomes a part of the later-described second water flow F4 that flows into the recess 14.

The second spout 22 is provided so as to open to the rear right side of the toilet bowl 10. The washing water discharged from the second spout 22 is discharged slightly forward to the left, a part of the washing water merges with the washing water discharged from the first spout 21, and the other part is on the pot surface 12 side. It becomes a part of the second water flow F4 that flows down to and flows into the recess 14. In the flush toilet 1 according to the present embodiment, the amount of washing water per washing is about 5 liters. The amount of wash water for one wash is stored in advance in a tank (not shown). The discharge flow rate of the washing water (the amount of water discharged per unit time) is almost maximum at the start of discharge, and then gradually decreases.

As shown in FIGS. 1 and 2, in the flush toilet 1 of the present embodiment, the flush water is mainly distributed in four water streams F1 to F4 in the toilet bowl 10. Of these, the mainstream F1 and the diversion F2 are water streams that are discharged from the spouts 21 and 22 and swirl in the toilet bowl 10. Further, the first water flow F3 and the second water flow F4 are water flows that flow down into the recess 14.

The washing water discharged from the spouts 21 and 22 forms at least two water streams of the main stream F1 and the branch stream F2 to wash the inside of the toilet bowl 10. That is, a part of the washing water forms the main stream F1 and the split stream F2 and circulates. Of these, the mainstream F1 is a water stream that flows along the elevation portion 11 along the periphery of the toilet bowl 10. The branch flow F2 is a water flow that separates from the mainstream F1 and flows down to the pot surface portion 12 side. The diversion F2 merges with the mainstream F1 at the confluence J on the downstream side. Then, in the washing water forming these two water streams F1 and F2, the main stream F1 reaches the confluence portion J earlier than the branch stream F2. Specifically, the split flow F2 separates from the mainstream F1 and flows down to the pot surface portion 12 side to clean the surface of the pot surface portion 12 and flows into the recess 14, but a part of the flow flows into the recess 14 at the confluence portion J on the downstream side to the mainstream F1. Meet. Of the mainstream F1 and the split F2 that merge at the confluence J, the mainstream F1 that first reaches the confluence J immediately after the start of discharging the washing water into the toilet bowl 10 is the first It arrives earlier than the branch F2 that reaches the confluence J.

In the case of this embodiment, such a confluence form of the mainstream F1 and the diversion F2 is a distance through which the diversion F2 circulates by deeply denting the surface of the pot surface portion 12 which is a distribution path to the confluence J of the diversion F2. Is realized by adjusting. That is, as shown in FIGS. 3 to 5, the diversion is performed by making the surface height of the portion of the pot surface portion 12 through which the diversion F2 flows is sufficiently deeper than the distribution height of the mainstream F1 (the height of the shelf surface portion 13). The moving distance of F2 is set to be long. That is, the length of the moving distance of the diversion F2 is set by utilizing the height difference between the mainstream F1 separated from the mainstream F1 at the height of the shelf surface 13 and the mainstream F1 again at the confluence J at the height of the shelf surface 13. ing. In this embodiment, the moving distance of the diversion F2 from the diversion from the mainstream F1 to the arrival at the confluence J is longer than the travel distance of the mainstream F1 from the diversion of the diversion F2 to the arrival at the confluence J. It is set. Further, by providing the height difference between the surface of the pot surface portion 12 and the surface of the shelf surface portion 13 in this way, the water force of the diversion F2 is weakened and the stall occurs. This also affects the arrival timing of the branch F2 at the confluence J.

Further, the merging portion J is located on the front side of the toilet bowl 10 and on the downstream side of the region A where the height of the mainstream F1 is the highest. As shown in FIG. 6, in this embodiment, the mainstream F1 flowing along the elevation portion 11 on the peripheral edge of the toilet bowl 10 is pressed against the elevation portion 11 in the outer peripheral direction under the influence of centrifugal force. The mainstream F1 circulates while changing its height according to the change in the curvature of the elevation portion 11 and the flow velocity. In FIG. 6, the imaginary line indicated by the reference numeral M indicates a locus of the highest reaching height indicating the position where the flow at the periphery of the toilet bowl 10 flows the highest on the surface of the elevation portion 11 during cleaning. Among them, the region A is the portion where the mainstream F1 is highest on the front side of the toilet bowl 10. When the diversion F2 merges in this region A, the washing water may reach a higher position and may be scattered outside the toilet bowl 10. Therefore, in this embodiment, the position of the merging portion J is set to the downstream side of the region A. In the case of this embodiment, as shown in FIG. 6, the region A where the height of the mainstream F1 is highest is located on the right side in front of the toilet bowl 10, so that the merging portion J is located further downstream. It is set to do.
In this embodiment, of the flow around the periphery of the toilet bowl 10, the highest portion on the front side of the toilet bowl 10 is the region A where the mainstream F1 is the highest, but when the split currents F2 merge, they merge. It may be the form in which the part J is the highest.

Such a form is realized as follows. That is, in this embodiment, as shown in FIG. 6, discharge starts from the spout 21 on the virtual line V connecting one spout 21 and the region A where the height of the mainstream F1 is highest in the plan view. Immediately after, the pot surface portion 12 is tilted so as to drop the diversion F2 into the recess 14. Specifically, as shown in FIG. 4, the inclination angles θ1 and θ2 of the surface of the pot surface portion 12 are set to 45 ° or more (more preferably 60 ° or more). Further, in this embodiment, the inclination angle θ1 of the surface on the left side (upstream side) of the pot surface portion 12 is made larger than the inclination angle θ2 of the surface on the right side (downstream side). As a result, the diversion F2 that is about to flow on the virtual line V is drawn toward the recess 14 side, and the washing water is prevented from reaching the region A linearly from the first spout 21. Further, by drawing the washing water on the virtual line V toward the concave portion 14, a force for urging the turning in the counterclockwise direction is applied to the diversion F2 so that the water merging on the downstream side. In this way, in this embodiment, it is realized that the merging portion J is located on the downstream side of the region A where the height of the mainstream F1 is the highest. Further, by dropping the diversion F2 that is about to flow on the virtual line V to the recess 14 side, the amount of water of the diversion F2 that reaches the confluence J is reduced and the water force and the flow velocity are lowered, so that the diversion F2 becomes the mainstream F1. The impact at the time of merging is alleviated, and the scattering of the washing water to the outside of the toilet bowl 10 is surely prevented.

Further, of the diversion F2, the component that tries to reach the region A linearly from the first spout 21, that is, the component that enters the surface of the elevation portion 11 at a large approach angle and tries to collide is on the recess 14 side. The formation of a swirling flow is promoted by flowing down or weakening the water force. As a result, when merging with the mainstream F1, the diversion F2 that has become a swirling flow has a smaller approach angle with respect to the surface of the elevation portion 11, and smoothly merges with the mainstream F1 flowing along the elevation portion 11. can do. Therefore, the impact at the time of merging between the mainstream F1 and the split F2 is further mitigated, and the scattering of the washing water to the outside of the toilet bowl 10 is more reliably prevented.

Further, as shown in FIGS. 1 and 2, in the flush toilet 1 of the present embodiment, the washing water flows down into the recess 14 by forming at least two water streams of the first water flow F3 and the second water flow F4. The first water stream F3 flows into the recess 14 from the front portion of the toilet bowl 10. The second water stream F4 flows into the recess 14 from the rear portion of the toilet bowl 10 and swirls in the recess 14 in the vertical direction. Specifically, as shown in FIG. 7, the second water flow F4 that has flowed into the recess 14 from the rear of the toilet bowl 10 becomes an upward flow on the front side of the recess 14 and winds up, and then descends again on the rear side of the recess 14. It turns in the vertical direction so as to flow and enters the drain pipe 30.

In the region where the first water flow F3 of the pot surface portion 12 flows down, a step portion 12A having a step in the vertical direction is formed. As shown in FIGS. 7 and 8, the step portion 12A is formed in the lower part of the pot surface portion 12, and the recess 14 is connected below the step portion 12A. The step portion 12A changes the flow direction of the first water flow F3. Specifically, the step portion 12A acts so as to separate the first water flow F3, which tends to flow along the surface of the pot surface portion 12, from the surface of the pot surface portion 12 on the downstream side thereof. In this embodiment, the step portion 12A is formed by recessing the surface of the pot surface portion 12 in a concave shape. Further, the step portion 12A is formed so as to extend in the horizontal direction along the surface of the pot surface portion 12. That is, in this embodiment, the step portion 12A has a width in the horizontal direction. As a result, it is possible to cope with the first water flow F3, which spreads horizontally along the surface of the pot surface portion 12 and flows down, or the flow position is displaced due to variations in water force or the like.

As shown in FIG. 8, a flow that winds up is formed below the step portion 12A among the flows that swirl in the vertical direction in the recess 14 of the second water flow F4. On the other hand, the first water stream F3 flows down from above the step portion 12A. The flow direction of the first water flow F3 that flows downward changes by passing through the step portion 12A, and collision with the second water flow F4 is avoided. The second water flow F4 rising from below the step portion 12A descends inside the recess 14 and enters the drain pipe 30. Further, as the first water flow F3 passes through the step portion 12A, the flow direction changes in substantially the same direction as the flow direction of the second water flow F4 and joins the second water flow F4. Therefore, the second water stream F4 can enter the drain pipe 30 while maintaining the water force. Therefore, the ability to push filth from the recess 14 into the drain pipe 30 is improved as compared with the case where the first water flow F3 and the second water flow F4 collide with each other and the water force is weakened.
As described above, the step portion 12A has an action of separating the passing first water flow F3 from the surface of the pot surface portion 12, but it is not necessary to peel off the entire amount thereof, and a part of the passing first water flow F3 is present. It may flow along the surface of the pot surface portion 12.

Further, the first water flow F3 that has passed through the step portion 12A merges with the second water flow F4 in the recess 14 and enters the drain pipe 30. As described above, the flow direction of the first water stream F3 changes as it passes through the step portion 12A. As a result, the first water flow F3 loses its water force and the flow velocity drops, but instead the cross-sectional area increases, the thickness increases, and the water flows into the recess 14. Therefore, the ability to push the filth from the recess 14 into the drain pipe 30 is further improved.

As described above, in the flush toilet 1 of the present embodiment, the first water flow F3 flows into the recess 14 from the front part of the toilet bowl 10, and the second water flow F4 flows into the recess 14 from the rear part of the toilet bowl 10. By ascending in front of, it swivels in the recess 14 in the vertical direction. Further, the first water flow F3 forms a flow away from the surface of the pot surface portion 12 by passing through the step portion 12A. As a result, a collision when the two water streams F3 and F4 merge in the recess 14 is avoided, so that a decrease in water force can be suppressed.

Therefore, the flush toilet 1 can suppress a decrease in the water force of the flush water and effectively exhibit the filth discharge performance.

Further, in the flush toilet 1, the step portion 12A is formed so as to extend in the horizontal direction along the surface of the pot surface portion 12. Therefore, the first water flow F3, which spreads horizontally along the surface of the pot surface portion 12 and flows down, or the flow position is displaced due to variations in water force or the like, can be reliably circulated to the step portion 12A.

<Other Examples>
The present invention is not limited to the examples described by the above description and drawings, and for example, the following examples are also included in the technical scope of the present invention.
(1) In the above embodiment, a mode in which the mainstream reaches the confluence where the mainstream and the diversion merge first is illustrated, but this is not essential.
(2) In the above embodiment, a form in which the toilet bowl has a horseshoe-shaped shelf surface in a plan view is illustrated, but this is not essential. Further, when the toilet bowl has a shelf surface portion, it is formed not only in the above-mentioned form but also in a narrower range such as the entire circumference of the toilet bowl or a substantially semicircular shape in a plan view. It may be in another form such as a shelf.
(3) In the above embodiment, the overhang portion that projects inward from the upper end of the elevation portion is not provided, but the overhang portion is formed on a part of the upper end of the toilet bowl or over the entire circumference. You may be.
(4) In the above embodiment, the embodiment including two spouts is illustrated, but one or three or more spouts may be provided. Further, when a plurality of spouts are provided, the spout from the second spout does not have to be a spout that generates a swirling flow. For example, a spout that spouts water only downward may be used.
(5) In the above embodiment, the spout is arranged on the rear side of the toilet bowl, but the position of the spout is not particularly limited. Further, the discharge direction of the washing water from the spout and the swirling direction in the toilet bowl due to the discharge direction are not limited.
(6) In the above embodiment, a form in which the step portion extends in the horizontal direction along the surface of the pot surface portion is illustrated, but the length of the step portion in this case is not particularly limited. Further, the extending direction of the step portion may be not only the horizontal direction but also a direction other than the horizontal direction including the vertical direction.
(7) In the above embodiment, in order to position the confluence portion on the downstream side of the region where the mainstream height is the highest, the spout is located on a virtual line connecting the spout and the region where the mainstream height is the highest. Although the form in which the pot surface portion is inclined so as to drop the diversion flow after the start of discharge from the to the recess is illustrated, it may be realized by another form. Also, it is not essential to position the confluence on the downstream side of the region where the mainstream height is the highest.
(8) In the above embodiment, the step portion formed by recessing the surface of the pot surface portion in a concave shape is illustrated, but the step portion may be formed by projecting the surface of the pot surface portion in a convex shape.
(9) In the above embodiment, the moving distance of the diversion from the branching from the mainstream to reaching the confluence is set longer than the moving distance of the mainstream from the diversion of the diversion to reaching the confluence. Is illustrated, but this is not essential.
(10) In the above embodiment, a form in which recesses are continuous below the step portion is illustrated, but the present invention is not limited to this. The step portion may be formed at a position separated from the recess above the lower end of the pot surface portion as long as the first water stream separates from the surface of the pot surface portion and flows into the recess.

1 ... Flush toilet 10 ... Toilet bowl 11 ... Elevation part 12 ... Pot surface part 12A ... Step part 13 ... Shelf surface part 14 ... Recesses 21 and 22 ... Water spouts (21 ... 1st spout, 22 ... 2nd spout)
30 ... Drainage pipe A ... Area where the height of the mainstream is highest F1 ... Mainstream F2 ... Divided flow F3 ... First water flow F4 ... Second water flow J ... Confluence part M ... Trajectory of the highest reached height at the elevation of the mainstream V … Virtual lines connecting the spout and the region with the highest mainstream height θ1, θ2… Inclination angle of the toilet bowl

Claims (2)

A toilet bowl having a recess formed on the pot surface and below the pot surface and connected to the drain pipe, and
A spout that discharges wash water into the toilet bowl,
Is equipped with
The washing water flows in the first water flow from the front part of the toilet bowl into the recess, and flows into the recess from the rear part of the toilet bowl and rises in front of the recess to rotate in the vertical direction in the recess. At least two water streams with the second water stream flow into the recess,
In the region of the pot surface where the first water flow flows down, a step portion having a step in the vertical direction is formed .
The flush toilet bowl is characterized in that the step portion is formed by recessing the surface of the lower portion of the pot surface portion in a concave shape, and the concave portion is connected below the concave portion . The flush toilet according to claim 1, wherein the step portion is formed so as to extend horizontally along the surface of the pot surface portion.

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