JP2020051052A - Water closet - Google Patents

Abstract

To provide the water closet that can form a stable vertical slewing flow in entire storage water in a pot part to increase a swirling force, and can improve dirt discharging performance.SOLUTION: The water closet comprises: a first rim water discharge port that allows a water flow f6 of first washing water, which is first rim water discharge, to flow into the pot part from a front of the pot part 12; and a second water discharge port that allows a water flow f3 of second washing water, which is a part of second rim water discharge, to flow into the pot part from a back of the pot part 12, and allows a water flow f4 of third washing water, which is a remainder of the second rim water discharge behind the pot part, to flow into the pot part from above and from a side of the pot part toward a bottom and forward of the pot part to lead to a tip part T of the pot part in front of it, wherein the tip part of the pot part has a guide part G that guides the water flow f4 of the third washing water flowing into the pot part from above and from the side of the pot part to the front of the pot part, and then raising the water flow f4 of the third washing water at the front of the pot part.SELECTED DRAWING: Figure 11A

Description

  The present invention relates to a flush toilet, and more particularly, to a flush toilet that is cleaned by flush water supplied from a flush water source and discharges waste.

2. Description of the Related Art Conventionally, as a conventional flush toilet that is washed with flush water supplied from a flush water source and discharges waste, for example, as described in Patent Documents 1 and 2, a water drop in a bowl portion of a toilet body is described. There is known a so-called flush-type flush toilet, which flushes waste by the flowing water action of the toilet.
In the conventional flush toilet described in Patent Literatures 1 and 2 described above, two rim spouts, a first rim spout and a second rim spout, and provided below the bowl portion for storing water. It has a pot portion that stores and forms sealed water, and a drain trap portion that has an inlet connected to the pot portion and discharges waste.
Thereby, the washing water discharged from the second rim spout from the second rim spout forms a vertical swirling flow that swirls up and down in the pot portion, and the vertical swirling flow agitates the pool water in the pot portion up and down. You can do it.
Further, the washing water in the pot is pushed into the drain trap portion by flushing the washing water discharged from the first rim spout from the front of the pot, so that the water in the pot is drained. It can be discharged to the trap section.

JP-A-2015-67954 JP 2018-105006 A

Here, in the conventional flush toilet described in Patent Literatures 1 and 2 described above, it is preferable to increase the vertical turning force from the viewpoint of stirring the stored water in the pot portion.
Further, in the conventional flush toilet described in Patent Documents 1 and 2 described above, the flush water discharged from the second rim water outlet from the second rim water discharge port is provided on one side wall side of the pot portion in the left-right direction. And rises on the other side wall opposite to the left and right direction of the pot portion through the bottom surface of the pot portion, thereby forming a vertical swirling flow in the left-right direction and the vertical direction.
Further, in addition to the washing water of the second rim spout, the washing water of the second rim spouting water spouted from the second rim spouting port includes the washing water flowing into the pot from the rear side and the washing water of the pot portion. After turning from the rear to the front of the pot via the side, there is washing water flowing from the front of the pot to the rear.
However, in the conventional flush toilets described in Patent Literatures 1 and 2 described above, the respective flows of the wash water of the second rim spouting water flowing from different directions into the basin interfere with each other. As a result, a vertical swirling flow disturbed vertically and horizontally is formed. As a result, there is a problem that the water force is reduced in the pot portion, and it is difficult to obtain a stable vertical turning force capable of sufficiently stirring the stored water.
Therefore, how to form a stable vertical swirling flow and increase the swirling force in the entire reservoir water in the basin part is important for suppressing the remaining of the floating filth in the bowl part and improving the filth discharge performance. It has become a challenge.

  Then, this invention is made in order to solve the subject of the above-mentioned prior art, and can form a stable vertical swirling flow in the entire reservoir water in the pot part, can increase the swirling force, and can improve the waste discharge performance. It is an object of the present invention to provide a flush toilet that can improve the toilet.

In order to solve the above-described problems, the present invention is a flush toilet that discharges waste by being washed by washing water supplied from a washing water source, and includes a bowl-shaped waste receiving surface and an upper part of the waste receiving surface. A rim portion, a bowl portion provided below the filth receiving surface and configured to store stored water to form sealed water, and a porcelain having an inlet connected to the tub portion. And a first rim water discharge section provided on the rim section for discharging the first rim water to discharge the wash water toward the front, the first rim water being the first rim water discharge. A first rim water discharge section provided with a first rim water discharge port for allowing water to flow into the vase section from the front of the vase section, and a second rim water discharge section provided in the rim section and performing a second rim water discharge. The second rinsing water, which is part of the second rim spout, The third rinsing water, which is a part of the remaining part of the second rim spouting water behind the jar portion, is flown into the jar portion, and the third rinsing water is directed downward and forward from above and from the side of the jar portion. A second rim spout provided with a second rim spout that flows into the interior and leads to a front end of the vase in front of the second rim spout. And a guide portion for guiding the third washing water flowing into the pot portion to rise.
In the present invention configured as described above, first, the second rim spout is spouted from the second rim spout to the back of the pot in the bowl portion, and the second washing water, which is a part of the second rim spout, It flows into the pot from behind the pot. This makes it possible to form a water flow (downflow) descending with respect to the pool water on the rear side in the pot portion.
Next, the third washing water, which is a part of the remaining portion of the second rim spout at the rear of the pot in the bowl portion spouted from the second rim spout, is directed upward and downward from the side of the pot and downward. It flows into the pot part toward. The third washing water is guided to the front end of the pot, reaches the front end of the pot, and is guided by the guide at the front end of the pot to the pool water on the front side of the pot. And a rising water flow (upflow) can be formed.
At this time, at least a part of the first rinsing water discharged from the first rim spout from the first rim spout flows into the pot from the front of the pot. Thus, the first cleaning water that has flowed into the pot portion can form a water flow that pushes the upward flow of the third cleaning water that has risen on the front side inside the pot portion backward.
As a result, in the pool water in the pot, at least the first to third washing water after the first rim spout and the second rim spout have joined, the water flow that rises on the front side in the pot section and then flows backward. Can be formed, and a water flow that flows forward after descending can be formed on the rear side in the pot portion.
Therefore, a flow (longitudinal swirl) vertically swirling in the front-rear direction and up-down direction can be stably formed in the entire reservoir water in the pot portion, so that the swirling force of the vertical swirl can also be increased.

In the present invention, preferably, the second rim spout is provided on the rim on one side in the left-right direction of the bowl, and is disposed forward of a rear end of the pot.
In the present invention configured as described above, the second rim spout is provided on the rim on one side in the left-right direction of the bowl portion and is disposed forward of the rear end of the pot portion. The second flushing water, which is a part of the second rim spout spouted from the spout to the back of the pot in the bowl, can flow into the pot from behind the pot. Thereby, an appropriate downward flow can be formed in the pool water on the rear side in the pot portion.
In addition, the third rinsing water, which is the remaining part of the second rim spout discharged from the second rim spout to the back of the pot portion in the bowl portion, also turns while maintaining the momentum above and to the side of the pot portion, It is possible to appropriately flow into the pot from above and from the side of the pot and downward and forward. Thus, the third washing water can be guided from the side of the pot to the front end and reach the tip of the pot. Thereafter, the third washing water can form an appropriate upward flow on the front side in the pot portion by the guide portion at the tip of the pot portion.
As a result of these, in particular, each of the second wash water and the third wash water of the second rim spout spouted from the second rim spout, is in the pot portion after the first rim spout and the second rim spout merge. It is possible to contribute to the formation of a stable vertical swirling flow in the entire reservoir.

In the present invention, preferably, the pot portion has a bottom surface, a side wall surface formed on a side of the bottom surface, the tip portion formed at a front end of the side wall surface, and the tip portion formed at the tip portion. A guide portion, wherein the pot portion is configured to supply the third rinsing water discharged from the second rim spout port from the second rim spout port to the bottom portion of the pot portion below from above the side wall surface of the pot portion. It is configured to flow toward the bottom surface and to guide from the bottom surface to the guide portion at the distal end.
In the present invention configured as described above, the third rinsing water, which is the remaining part of the second rim spout discharged from the second rim spout to the back of the pot in the bowl portion, is above the side wall surface of the pot. From the bottom to the bottom, and then can be efficiently guided from the bottom of the pot to the guide at the tip.
As a result, it is possible to form an ascending flow that largely raises the third cleaning water on the front side in the basin portion, so that the vertical swirling flow formed in the basin portion after the first rim spout and the second rim spout merge. Vertical turning can be effectively promoted.

In the present invention, preferably, the first rim spout is provided on the rim on the other side in the left-right direction of the bowl, and is disposed forward of a front end of the pot. When the first rinsing water, which is the first rim spout spouted from the first rim spout, flows into the jar from the front of the jar, the first rinsing water and the first rinsing water in front of the jar are provided. 3 It is configured to merge the upward flow of the cleaning water.
In the present invention configured as described above, the first washing water discharged from the first rim spout from the first rim spout can effectively flow from the front toward the jar portion, and the first rinsing water from the first rim spout port can be discharged from the front side inside the jar portion. It can join the ascending flow of the rising third washing water.
Then, since the combined washing water is pushed toward the drain trap portion at the rear and the lower part, the strong vertical swirling flow which raises the entire reservoir water at the front side and lowers it at the rear side in the pot portion is effective. Can be formed.
Therefore, since the strong vertical turning of the washing water can be realized in the pot portion after the first rim spout and the second rim spout have joined, the performance of discharging waste from the pot portion to the drain trap portion can be improved. it can.

In the present invention, preferably, the guide portion forms a flow path that spreads the third washing water reaching the front end from the bottom surface of the pot portion in the left-right direction while guiding the third washing water upward from below.
In the present invention configured as described above, the third rinsing water discharged from the second rim, which has reached the front end portion from the bottom surface of the pot portion, is guided upward from below by the flow path formed in the guide portion. It can spread left and right while rising.
As a result, the rising flow of the third washing water rising on the front side of the pot and the first washing water flowing from the front of the pot can be surely merged. As a result, a strong vertical swirling flow descending on the rear side can be reliably formed.
Therefore, strong vertical turning of the washing water can be reliably achieved in the pot after the first rim spout and the second rim spout have joined, and the performance of discharging waste from the pot to the drain trap is reliably improved. Can be done.

In the present invention, preferably, the guide portion is provided below the lower rising portion forming a flow path for raising the third cleaning water so as to guide the third washing water upward from below, and a lower rising portion of the lower rising portion. An upper widening portion that is provided above and forms a flow path that widens the third washing water that is rising by the lower rising portion in the left-right direction.
In the present invention thus configured, first, the third rising water of the second rim spout that has reached the front end from the bottom surface of the jar portion by the lower rising portion of the guide portion is surely moved upward from below. I can guide you.
Next, the third cleaning water rising at the lower rising portion can be spread in the left-right direction by the upper widening portion of the guide portion.
As a result, on the front side in the pot portion, the third washing water that rises on the lower rising portion of the guide portion and spreads in the left-right direction at the upper widening portion and the first washing water that flows from the front of the pot portion more reliably merge. Can be done.
Therefore, in the pot portion after the first rim water discharge and the second rim water discharge merge, a strong vertical swirling flow that raises the entire reservoir water on the front side and lowers it on the rear side can be formed more reliably.
Therefore, strong vertical turning of the washing water can be more reliably realized in the pot portion, and the performance of discharging waste from the inside of the pot portion to the drain trap portion can be more reliably improved.

In the present invention, preferably, the guide portion includes a bent portion formed so as to protrude forward at a tip end portion of the pot portion, and a curvature radius in a plan view at a front end of the bent portion is: It is set to be smaller as the bent portion is located on the bottom side of the pot portion, and is set to be larger as the bent portion is located above the pot portion.
In the present invention thus configured, the radius of curvature in plan view at the front end of the bent portion of the guide portion that projects forward at the tip of the pot portion is such that the bent portion is located closer to the bottom side of the pot portion. , Can be set to be smaller. Thereby, when the third washing water that has flowed into the bottom surface from above the side wall surface of the pot portion to the bottom portion reaches the tip portion of the pot portion, the third washing water can be collected by the tapered bent portion. Since the third washing water temporarily stays on the bottom surface side of the bent portion, the upward flow can be efficiently formed.
In addition, the radius of curvature of the front end of the bent portion in plan view can be set to be larger as the bent portion is located on the upper side of the pot portion, so that the third cleaning water is above the pot portion of the bent portion. It is easy to ascend while spreading in the left-right direction on the side.
Therefore, the ascending third flushing water and the first flushing water flowing from the front of the pot are surely merged, so that the pool in the pot after the first rim spout and the second rim spout merge. A strong longitudinal swirl can be formed in which the whole water rises on the front side and descends on the rear side.

In the present invention, preferably, the bottom surface of the pot includes a front bottom portion formed in front of an entrance of the drain trap, and the pot is discharged from the second rim spout. The third rinsing water of the second rim spout is caused to flow from the side wall surface of the pot portion behind the front bottom surface portion of the bottom surface of the pot portion toward the front bottom surface portion below and from the front bottom portion. The guide section is configured to be guided to the guide section at the distal end section.
In the present invention configured as described above, the third rinsing water discharged from the second rim water discharge port toward the rear of the pot in the bowl portion is particularly higher than the front bottom surface portion of the bottom surface of the pot portion. After flowing into the pot from above the side wall surface of the rear pot, it can reach the front bottom face of the lower bottom face. This allows the subsequent third washing water to be efficiently guided from the front bottom surface of the pot to the guide at the tip.
Further, since the generation of the third washing water in the horizontal direction can be suppressed in the pot portion after the first rim water discharge and the second rim water discharge merge, the vertical swirling of the vertical swirling flow formed in the pot portion. Can be effectively promoted.

In the present invention, preferably, the bottom surface of the pot includes a rear bottom portion formed behind the entrance of the drain trap, and the pot is spouted from the second rim spout. The second washing water discharged from the second rim is guided from the rear of the pot to the rear bottom surface.
In the present invention configured as described above, particularly, when the second washing water of the second rim spout spouted from the second rim spout to the back of the pot portion in the bowl portion flows into the pot portion from behind the pot portion. Thus, a water flow (downflow) descending with respect to the pool water on the rear side in the pot portion can be reliably formed. Thereafter, when the second cleaning water reaches the rear bottom surface portion, the downstream downward flow in the pot portion can be swirled forward.
Therefore, a strong vertical swirling flow in the front-rear direction due to the second cleaning water can be easily formed in the pot portion after the first rim water discharge and the second rim water discharge merge.

  ADVANTAGE OF THE INVENTION According to the flush toilet of this invention, a stable vertical swirl flow can be formed in the whole pooled water in a pot part, and a swirl force can be increased and the waste discharge performance can be improved.

1 is a schematic plan view of a flush toilet according to an embodiment of the present invention. FIG. 2 is a sectional view taken along the line II-II in FIG. 1. FIG. 3 is a cross-sectional view along the line III-III in FIG. 1. FIG. 4 is a sectional view taken along line IV-IV in FIG. 1. It is the elements on larger scale which expanded the part of the bowl part containing the 2nd rim waterway and the 2nd rim water spout in the toilet body of the flush toilet according to one embodiment of the present invention shown in Drawing 1. FIG. 4 is a partially enlarged view of a second rim spout in a flush toilet according to the embodiment of the present invention shown in FIG. 3. FIG. 4 is a schematic plan view schematically illustrating the flow of the wash water before the swirling flow of the first rim spout merges with the water flow of the second rim spout in the bowl portion of the flush toilet according to the embodiment of the present invention. . FIG. 4 is a schematic plan view schematically illustrating the flow of the wash water after the swirling flow of the first rim spout merges with the second rim spout water flow in the bowl portion of the flush toilet according to the embodiment of the present invention. And a state before a longitudinal swirling flow in the front-rear direction is formed in the pot portion. It is a schematic plan view which roughly explains each area | region of the shelf-like surface in a bowl part of the flush toilet according to one Embodiment of this invention, an inclined surface, and each connection surface, and the front-back direction in a jar part. Shows a state immediately before the vertical swirling flow is formed. FIG. 5 is a partially enlarged view of a left-side area of each of a filth receiving surface of a bowl portion and a pot portion of the flush toilet according to the embodiment of the present invention shown in FIG. 4. It is the elements on larger scale which expanded the part of the pot part in the bowl part of the flush toilet according to one embodiment of the present invention. FIG. 4 is a schematic side cross-sectional view schematically illustrating a flow of wash water in a state immediately before a longitudinal swirling flow in the front-rear direction is formed in a bowl portion of a bowl portion of a flush toilet according to an embodiment of the present invention. FIG. 3 is a schematic side sectional view schematically illustrating a flow of wash water in a state in which a longitudinal swirling flow in a front-rear direction is formed in a pot portion of a bowl portion of a flush toilet according to an embodiment of the present invention.

Next, a flush toilet according to an embodiment of the present invention will be described with reference to FIGS. 1 to 11B.
First, FIG. 1 is a schematic plan view of a flush toilet according to one embodiment of the present invention.
As shown in FIG. 1, a flush toilet 1 according to an embodiment of the present invention includes a toilet body 2 made of ceramic. The toilet body 2 includes a water conduit 4, a bowl-shaped bowl portion 6, and a drain trap conduit 8 from the upstream side to the downstream side.
The toilet body 2 may be made of a resin other than the ceramic.

Next, a toilet seat (not shown), a toilet lid (not shown), and the like are provided on the upper surface of the toilet body 2 of the flush toilet 1 of the present embodiment shown in FIG. Since the structure is the same as that of the toilet, a detailed description is omitted.
In addition, on the upper surface of the toilet body 2, on the rear side of the toilet seat (not shown) and the toilet lid (not shown), a sanitary washing section (not shown) for cleaning a local part of the user and the toilet body 2 are provided. A functional part (not shown) such as a water supply system functional part related to the water supply function may be provided. However, since these are also the same as the structure of the conventional flush toilet, a specific description will be given. Is omitted.

Next, as shown in FIG. 1, a flush toilet 1 according to an embodiment of the present invention is a gravity water supply type water storage which is a flush water source for storing flush water used for flushing a toilet and supplying the flush water to a toilet main body 2. This is a so-called “wash-down type flush toilet” that includes a tank 10 and flushes out dirt by flowing water due to a head drop in the bowl portion 6 of the toilet body 2.
In the present embodiment, the washing water source for supplying the washing water to the toilet body 2 is not limited to the tank-type form such as the above-mentioned gravity water supply type water storage tank 10, but can be applied to other forms. . That is, the flush water source for supplying flush water to the toilet body 2 may be a tap water direct pressure type using water supply pressure directly or a flush valve type, or may use a pump supplementary pressure. Then, the cleaning water may be supplied.

Next, FIG. 2 is a sectional view taken along line II-II in FIG. FIG. 3 is a sectional view taken along the line III-III in FIG. FIG. 4 is a sectional view taken along the line IV-IV in FIG.
In the flush toilet 1 of the present embodiment shown in FIGS. 2 to 4, the outer portion of the toilet main body 2 and the water storage tank 10 are omitted, and details will be described later. Only the main parts of the toilet body 2 such as the water channel 4 and the drain trap line 8 are shown.

Here, in the flush toilet 1 according to the embodiment of the present invention shown in FIG. 1, in a plan view of the bowl part 6 of the toilet body 2, the bowl part 6 is horizontally and horizontally halved so as to bisect the bowl part 6 in the front-rear direction. The extending central axis is indicated by “X”, and the central axis extending in the horizontal front-rear direction so as to bisect the bowl portion 6 in the left-right direction is indicated by “Y”.
In FIG. 1, the intersection of the center axes X and Y is defined as the center O of the bowl portion 6 in plan view, and the center axis extending through the center O in the vertical direction is denoted by “Z”.
Thus, in the flush toilet 1 according to the embodiment of the present invention shown in FIGS. 2 and 3, when the bowl portion 6 of the toilet body 2 is viewed from the side, the bowl portion 6 is vertically divided into two equal parts in the front-rear direction. The central axis extending in the direction is indicated by "Z".
Further, as shown in FIGS. 1 to 3, the front, rear, left and right directions of the flush toilet 1 are indicated by “front”, “rear”, “left”, and “right”, respectively. In addition, the left-right direction may be referred to as “side”.

Next, as shown in FIGS. 1 to 4, the water conduit 4 located on the upstream side of the toilet body 2 is formed on the rear side of the bowl portion 6, and the washing water supplied from the water storage tank 10 is supplied to the bowl portion 6. Is to lead to.
As shown in FIGS. 1 to 4, the bowl portion 6 located on the downstream side of the headrace channel 4 of the toilet body 2 is configured such that the pot portion 12, the filth receiving surface 14, the shelf 16, And a rim 18.

First, as shown in FIG. 1 to FIG. 4, the pot portion 12 of the bowl portion 6 is provided below the bowl portion 6, stores stored water W0 therein, and seals water (sealing surface WL). Has formed.
As shown in FIGS. 1 to 4, the pot 12 includes a bottom wall 12 a, side walls (left side wall 12 b and right side wall 12 c) provided on the left and right sides of the bottom wall 12 a, and a bottom wall 12 a. And a rear wall 12d provided rearward.
Further, as shown in FIG. 1, the front sides of the side walls 12 b and 12 c on both sides of the pot section 12 have a tapered shape that becomes closer to each other from the rear to the front in plan view. Is the tip T.

Here, as shown in FIG. 1 to FIG. 3, in the area within the bowl portion 6 of the flush toilet 1 of the present embodiment, first, the pot is provided on the left rim portion 18 in the bowl portion 6 and With respect to the first rim spout 20 located forward of the front end T of the portion 12, an area forward of the front-rear position P1 of the first rim spout 20 is defined as a "front area F of the bowl portion 6". I do. In the front region F of the bowl portion 6, the left region L and the right region R with respect to the center axis Y in the horizontal front-rear direction of the bowl portion 6 are referred to as a "left front region LF of the bowl portion 6" and a "bowl portion," respectively. 6 right front region RF ".
Next, in the area within the bowl portion 6 of the flush toilet 1 of the present embodiment, a region on the upper edge of the pot portion 12 and behind the rear end position P2 is defined as a “rear region B of the bowl portion 6”. . Further, in the rear region B of the bowl portion 6, the left region L and the right region R with respect to the center axis Y in the horizontal front-rear direction of the bowl portion 6 are referred to as “left rear region LB of the bowl portion 6” and “bowl portion,” respectively. 6 right rear region RB ”.
Further, as shown in FIGS. 1 to 3, in a region inside the bowl portion 6 of the flush toilet 1 of the present embodiment, a portion between the front region F and the rear region B is referred to as an “intermediate region M of the bowl portion 6”. Define. Further, in the intermediate region M of the bowl portion 6, a region on the left side of the upper edge of the left side wall 12 b of the pot portion 12 is defined as “left region LM of the bowl portion 6”, and the right side wall 12 c of the pot portion 12 is formed. A region on the right side of the upper edge is defined as a "right region RM of the bowl portion 6".

Next, as shown in FIGS. 1 to 4, the waste receiving surface 14 of the bowl portion 6 is connected to the shelf surface 16 a of the shelf portion 16 and the rim of the rim portion 18 from the lower edge connected to the upper edge of the pot portion 12. Together with the wall surface 18a, a bowl-shaped bowl surface is formed, and serves as a surface for receiving dirt.
In FIGS. 1 to 4, a boundary line between the pot portion 12 and the waste receiving surface 14 (the upper edge of the pot portion 12 and the lower edge of the waste receiving surface 14) is “L1”.
The rim portion 18 of the bowl portion 6 forms the upper edge of the bowl portion 6, and the inner peripheral surface (rim inner wall surface 18a) of the rim portion 18 has a substantially oval shape in plan view shown in FIG. It is formed in a shape.
Further, the shelf 16 of the bowl 6 is formed between the outer edge of the waste receiving surface 14 and the lower end of the rim 18. The washing water in the water channel 4 is guided to each of two rim water outlets (first rim water outlet 20 and second rim water outlet 22), which will be described in detail later. Thereby, each of the first rim water discharge port and the second rim water discharge port is discharged from each of the first rim water discharge port 20 and the second rim water discharge port 22.
In the present embodiment, it is not always necessary to provide the shelf 16, and the first rim water discharge and the second rim water discharge are respectively provided from the first rim water discharge port 20 and the second rim water discharge port 22. The upper edge may be spouted.

Next, as shown in FIGS. 1 to 4, the water channel 4 includes a common water channel 24, a first rim water channel 26, and a second rim water channel 28.
First, the common water conduit 24 is formed inside the toilet body 2 on the rear side of the bowl portion 6 so as to extend from the rear inlet 4a connected to the water storage tank 10 to near the rear side of the front bowl portion 6. .

Next, as shown in FIGS. 1, 2, and 4, the first rim water conduit 26 branches off from the common water conduit 24 to the left of the bowl portion 6 near the back side of the bowl portion 6, and then branches off from the bowl portion 6. Is formed inside the rim portion 18 so as to extend to the front first rim spout 20 while bypassing the outer peripheral surface of the rim portion.
As a result, the wash water supplied from the common water conduit 24 to the first rim water conduit 26 is discharged from the first rim water discharge port 20 to the front shelf 16 as the first rim water discharge, and then is discharged from the bowl portion 6. A swirling flow is formed so as to swirl from the left front region LF to the right region RM via the right front region RF.

On the other hand, as shown in FIGS. 1, 3, and 4, the second rim water discharge port 22 is provided in the rim portion 18 in the right side region RM in the bowl portion 6, and the position of the front end T of the pot portion 12 is provided. Rearward and forward of the rear end position P2. In other words, the second rim water outlet 22 is disposed behind the first rim water outlet 20.
The second rim spout 22 is located behind the center of the pot 12 in the front-rear direction (the center O1 in the front-rear direction of the pot 12 shown in FIG. 1).
Further, as shown in FIGS. 1, 2 and 4, the second rim conduit 28 branches from the common conduit 24 to the right side of the bowl 6 near the back side of the bowl 6, as will be described in detail later. After that, it is formed so as to extend to the rim portion 18 of the right side region RM of the front bowl portion 6 while bypassing the outer peripheral surface of the bowl portion 6.
After that, the second rim water conduit 28 extends rearward by making a U-turn rearward in the rim portion 18 in the right side region RM of the bowl portion 6, and then diagonally rearward toward the second rim water discharge port 22. And is formed so as to extend to the second rim water discharge port 22.

Next, as shown in FIG. 1 to FIG. 4, a drain trap line 8 located downstream of the toilet body 2 is formed from below the bowl portion 6 to the rear, and drains the waste in the bowl portion 6. Road (drain trap section).
The inlet 8a of the drain trap pipe 8 is connected to a drain port h below the bottom 12 (bottom wall 12a) of the bowl 6. The drain trap line 8 includes a descending path 8b that descends downward and backward from the inlet 8a, and an upward path 8c that rises upward and backward from the downstream end of the descending path 8b.

Next, the details of the second rim conduit 28 and the second rim spout 22 in the flush toilet 1 of the present embodiment will be described with reference to FIGS. 1 and 3 to 6.
First, FIG. 5 is a partially enlarged plan view in which the bowl portion including the second rim water conduit and the second rim spout in the toilet body of the flush toilet according to the embodiment of the present invention shown in FIG. 1 is enlarged. . FIG. 6 is a partially enlarged view of the second rim spout in the flush toilet according to the embodiment of the present invention shown in FIG. 3.
As shown in FIG. 5, the second rim headrace 28 includes an outer headrace 30, a first bent headrace 32, and a second bent headrace 34 from the inlet 28 a toward the downstream side. I have.

As shown in FIG. 5, the outer water conduit 30 of the second rim water conduit 28 has its inlet 28 a connected to the common water conduit 24 on the rear side (upstream side). Is formed in the rim portion 18 in the right side region RM of the bowl portion 6 of FIG.
Next, as shown in FIG. 5, the first bent waterway 32 of the second rim waterway 28 extends forward from the front end (downstream end) E1 of the outer waterway 30, and then extends rearward at the bent portion B1. It is formed to bend toward. That is, the bent portion B1 of the first bent water conduit 32 is a portion that turns into a U-shape in plan view of FIG. As a result, the washing water flowing into the first bent headrace channel 32 from the upstream outer headrace channel 30 toward the front passes through the first bent headrace channel 32 and is turned backward. I have.
Further, as shown in FIG. 5, the second bent headrace channel 34 of the second rim headrace channel 28 is provided downstream downstream of the first bent headrace channel 32. The second bent headrace channel 34 is formed in the upstream rear headrace channel 34a extending from the downstream end E2 of the first bent headrace channel 32 to the rear bent portion B2, and in the right rear region RB of the bowl portion 6 obliquely rearward by the bent portion B2. And a downstream water conduit 34b extending to the second rim water outlet 22 after being bent toward the second rim water discharge port 22.
As a result, the wash water flowing backward from the downstream end E2 of the first bent water conduit 32 into the upstream water passage 34a of the second bent water conduit 34 passes through the bent portion B2 of the second bent water conduit 34. As a result, the direction is changed obliquely rearward toward the right rear region RB of the bowl portion 6. Then, the washing water that has passed through the downstream water conduit 34b is discharged from the second rim water discharge port 22 as the second rim water discharge.

Here, as shown in FIGS. 1 and 5, the length of the path from the inlet 28 a of the second rim water conduit 28 to the second rim water outlet 22 is determined by the distance from the inlet 26 a of the first rim water conduit 26 to the first rim water outlet. The length is set to be shorter than the length of the path to the water outlet 20.
The average flow path cross-sectional area in the path from the inlet 28 a of the second rim water conduit 28 to the second rim water outlet 22 is the average in the path from the inlet 26 a of the first rim water conduit 26 to the first rim water outlet 20. It is set smaller than the flow path cross-sectional area.
Accordingly, the water discharge amount V2 [L] and the flow rate Q2 (instantaneous flow rate) [L / min] of the second rim water discharged from the second rim water discharge port 22 are discharged from the first rim water discharge port 20. The water discharge amount V1 [L] of the first rim water discharge and the flow rate Q1 (instant flow rate) [L / min] are set to be smaller than each (V2 <V1, Q2 <Q1).
Incidentally, in the flush toilet 1 of the present embodiment, for example, assuming that the total water discharge amount V [L] of the wash water W supplied from the water storage tank 10 to the common water passage 24 is 100%, the first water from the common water passage 24 The water discharge amount V1 [L] of the first rim water discharge W1 supplied to the rim water conduit 26 is preferably set to 70% to 80% of the total water discharge amount V [L]. It is preferable that the water discharge amount V2 [L] of the second rim water discharge W2 supplied to the rim water conduit 28 be set to 20% to 30% of the total water discharge amount V0 [L].

As shown in FIG. 5, the second rim water discharge port 22 includes a diffusion portion D that diffuses the water flow f2 of the second rim water discharge W2 in a film shape wider than the swirl flow f1 of the first rim water discharge W1.
The diffusion portion D also serves as a downflow promoting portion that promotes the formation of an inner water flow f2a in which a part of the water flow f2 of the second rim water discharge W2 falls to the pot portion 12 via the right rear region RB of the bowl portion 6. It is working.
In addition, in the diffusion unit D, the swirl flow f1 of the first rim water discharge W1 discharged from the first rim water discharge port 20 and the water flow f2 of the second rim discharge water W2 discharged from the second rim water discharge port 22 merge. It also functions as a rotation maintaining unit that maintains the revolving property of the washing water W3 in the rear area B of the bowl 6 after the interference. As a result, the washing water W3 after the merging of the rear region B of the bowl portion 6 turns to the left region LM of the bowl portion 6, and then the front left region of the bowl portion 6 forward of the first rim water discharge port 20. It is possible to turn from LF to the vicinity of the right front area RF.
Here, as a specific structure of the diffusion portion D of the second rim water discharge port 22, the flow of the downstream side water flow path 34 b of the second bent water flow path 34 and the flow of the second rim water discharge port 22 in a plan view shown in FIG. The direction of the road center axis C1 forms a predetermined angle α1 (0 ° <α1 <90 °) with respect to the tangent plane T1 of the rim inner wall surface 18a near the rear end of the second rim water outlet 22 in the rim portion 18. Is provided.
The predetermined angle α1 formed by the flow path center axis C1 and the tangent plane T1 in a plan view shown in FIG. 5 is preferably set to 10 to 20 degrees, and is set to 15 to 20 degrees. Is most preferred.

That is, as shown in FIG. 5, the opening end face A1 of the second rim water outlet 22 is inserted obliquely rearward toward the right rear area RB of the bowl portion 6 by the above-described diffusion portion D of the second rim water outlet 22. Is turned.
Thereby, a part of the water flow f2 of the second rim water discharge W2 previously discharged from the second rim water discharge port 22 to the right rear region RB of the bowl portion 6 can flow down into the pot portion 12 from the rear side, The remaining part of the water flow f2 of the second rim water discharge W2 can cross in the left-right direction from the right rear region RB to the left rear region LB of the bowl portion 6.
On the other hand, as shown in FIGS. 1 and 5, the first rim water discharge W1 spouted forward from the first rim water discharge port 20 passes through the right front region RF from the left front region LF in the bowl portion 6 through the right front region RF. When turning to the RM and reaching the vicinity of the second rim water discharge port 22, the second rim water discharge which is discharged in advance toward the right rear area RB of the bowl portion 6 and crosses the turning direction of the first rim water discharge W1. It can join and interfere with the water flow f2 of W2.

Next, as shown in FIG. 5, as the diffusion part D of the second rim water discharge port 22, the flow path width d2 of the downstream water conduit 34 b of the second bent water conduit 34 is set to the upstream side of the second bent water conduit 34. It is set larger than the flow channel width d1 of the water conduit 34a.
Thereby, after the washing water flowing backward from the first bent headrace channel 32 to the second bent headrace channel 34 is turned obliquely rearward at the bent portion B2 of the second bent headrace channel 34, the second bent headrace channel is changed. The second rim water discharge W2 discharged obliquely rearward from the second rim water discharge port 22 can be effectively diffused radially by passing through the downstream rim water passage 34b, so that the second rim water discharge W2 can be formed into a wide and film-like shape. It has become.

Next, as shown in FIGS. 3 to 6, the inclined surface S <b> 1 formed obliquely rearward from the second rim water discharge port 22 on the dirt receiving surface 14 in the right rear region RB of the bowl portion 6 extends rearward. The slope is rising.
In addition, as shown in FIGS. 3 to 6, in the right rear region RB of the bowl portion 6, the waste receiving surface 14 formed on the rear side in the circumferential direction of the bowl portion 6 from the bottom surface 22 a of the second rim water discharge port 22. The edge 14a and the shelf surface 16a of the shelf 16 are inclined upward from the front side toward the rear end of the rim inner wall surface 18a (the rear end 18b of the rim inner wall surface).

  Further, as shown in FIGS. 5 and 6, the second rim water discharge port 22 is disposed on a predetermined rim inner wall surface 18 c on the upstream side in the circumferential direction from the rear end 18 b of the rim inner wall surface of the rim portion 18. The radius of curvature ρ1 in plan view of the predetermined rim inner wall surface 18c is set to be larger than the radius of curvature ρ2 of the rim inner wall surface rear end 18b in plan view (ρ1> ρ2).

Next, FIG. 7A schematically illustrates the flow of the wash water before the swirling flow of the first rim spouting water merges with the second rim spouting water flow in the bowl portion of the flush toilet according to the embodiment of the present invention. It is the schematic plan view demonstrated.
FIG. 7B schematically illustrates the flow of the wash water after the swirling flow of the first rim spout merges with the second rim spout water flow in the bowl portion of the flush toilet according to the embodiment of the present invention. FIG.
First, as shown in FIGS. 1 and 7A, in the flush toilet 1 according to the present embodiment, when the flushing of the toilet is started, the flush water in the water storage tank 10 flows from the inlet 4 a of the water conduit 4 of the toilet body 2. The water is supplied to the common water conduit 24. The cleaning water W in the common water conduit 24 branches to the first rim water conduit 26 and the second rim water conduit 28 as the first cleaning water W1 and the second cleaning water W2, respectively.

Next, as shown in FIG. 1 and FIG. 7A, in the flush toilet 1 according to the present embodiment, the first flush water W1 of the first rim water conduit 26 flows forward from the first rim water discharge port 20 on the downstream side. Water is discharged as the first rim water discharge W1. The first rim water discharge W1 forms a swirling flow f1 that swirls from the left front region LF in the bowl portion 6 to the right region RM via the right front region RF.
On the other hand, as shown in FIG. 1, FIG. 5 and FIG. 7A, the second washing water W2 of the second rim conduit 28 flows from the outer conduit 30 into the first bent conduit 32 in front, and By passing through the bent portion B1 of the water channel 32, the water is turned backward and flows.
After that, the second washing water W2 that has passed through the first bent headrace channel 32 flows into the upstream side headrace channel 34a of the second bent headrace channel 34 at the rear thereof, and obliquely rearward at the bent portion B2 of the second bent headrace channel 34. After being changed to the downstream water conduit 34b, the water passes through the downstream water conduit 34b, which is the diffusion portion D of the second rim water discharge port 22.
Then, the second cleaning water W2 is discharged from the second rim water discharge port 22 as the second rim water discharge W2. The second rim water discharge W2 is diffused toward the right rear region RB in the bowl portion 6, and forms a film-like water flow f2 wider than the swirl flow f1 of the first rim water discharge W1.
Here, since the second rim water conduit 28 is set to a path length shorter than the path length of the first rim water conduit 26, the swirl flow f1 of the first rim water discharge W1 is generated in the right rear region RB of the bowl portion 6. Before reaching the region where the second rim water discharge W2 merges with the water flow f2 and interferes with the second rim water discharge W2, the second rim water discharge W2 is preliminarily performed from the second rim water discharge port 22 at an early timing.

As shown in FIGS. 5 and 7A, the water flow f2 of the second rim water discharge W2 immediately after the start of water discharge from the second rim water discharge port 22 has a generally fan shape from the upstream side to the downstream side in plan view. It has a wide, film-like shape that spreads.
Further, the water flow f2 of the second rim water discharge W2 immediately after the start of the water discharge forms a wide and film-like water flow in a range between the inner water flow f2a and the outer water flow f2b.
Here, as shown in FIG. 5 and FIG. 7A, the inner water flow f2a of the second rim water discharge W2a is the second rim water discharge W2a in the first direction from the second rim water discharge port 22 toward the rear area B of the bowl portion 6. It is a water current.
On the other hand, the outer water flow f2b of the second rim water discharge W2 is a water flow of the second rim water discharge W2b in the second direction that is the same as the turning direction of the swirl flow f1 of the first rim water discharge W1.
In addition, the flow rate (first flow rate Q2a [L / min]) of the inner water flow f2a of the second rim water discharge W2a is larger than the flow rate (second flow rate Q2b [L / min]) of the outer water flow f2b (Q2a>). Q2b).

Next, as shown in FIGS. 1, 5 and 7B, the swirl flow f1 of the first rim water discharge W1 discharged from the first rim water discharge port 20 changes from the left front region LF in the bowl portion 6 to the right front region. When turning to the right side region RM via RF and reaching the vicinity of the second rim water discharge port 22, water is discharged in advance toward the right rear region RB of the bowl portion 6 and crosses in the turning direction of the first rim water discharge W1. The water flow f2 of the second rim water discharge W2 is merged and interfered with.
As a result, as shown in FIG. 7B, the washing water W3 after the first rim spouting water W1 and the second rim spouting water W2 join is guided to the right rear region RB of the bowl portion 6 behind the pot portion 12. A part of the washing water W3 flows down from the rear side into the pot 12 from the rear side.
Further, as shown in FIG. 7B, another part of the water flow f <b> 4 of the combined washing water W <b> 3 guided to the right rear region RB of the bowl portion 6 is moved from the left rear region LR of the bowl portion 6 to the left region LM. After turning, the water flows into the pot portion 12 from the left side.
On the other hand, as shown in FIG. 7B, the remaining water flow f5 of the washing water W3 after the merging of the right rear region RB of the bowl portion 6 is from the left rear region LB of the bowl portion 6 to the front region F via the left side region LM. It turns.
As shown in FIG. 7B, the water flow f5 in the front region F of the bowl portion 6 quickly branches off from the swirl flow f1 of the first rim water discharge W1 in the front region F of the bowl portion 6 and flows down. The water flow f6 is formed by merging with the water flow, and the water flow f6 flows into the pot portion 12 from the front side.
As a result, the filth receiving surface and the rim 18 in the rear region B of the bowl 6 to which filth easily adheres are washed extensively with the washing water W3 after merging, and then flow into the pot 12.
The washing water W3 flowing into the tub 12 forms a vertical swirling flow (details will be described later) in the front-rear direction and the front-rear direction in the tub 12. By the swirling flow, the dirt washed in the bowl portion 6 is discharged from the basin portion 12 to the drain trap pipeline 8.

Next, FIG. 8 is a schematic plan view schematically illustrating the respective areas of the shelf-like surface, the inclined surface, and the connection surface in the waste receiving surface of the bowl portion of the flush toilet according to the embodiment of the present invention. The figure shows a state immediately before a longitudinal swirling flow in the front-rear direction is formed in the pot portion.
9 is a partially enlarged view of the left side area of each of the filth receiving surface of the bowl portion and the pot portion of the flush toilet according to the embodiment of the present invention shown in FIG.
Further, FIG. 10 is a partially enlarged plan view in which a pot portion in the bowl portion of the flush toilet according to one embodiment of the present invention is enlarged.
FIG. 11A is a schematic side view schematically illustrating the flow of wash water in a state immediately before a longitudinal swirling flow in the front-rear direction is formed in a pot portion of a bowl portion of a flush toilet according to an embodiment of the present invention. It is sectional drawing.
Further, FIG. 11B is a schematic side cross-sectional view schematically illustrating a flow of the wash water in a state where a longitudinal swirling flow in the front-rear direction is formed in the pot portion of the bowl portion of the flush toilet according to the embodiment of the present invention. FIG.

First, as shown in FIGS. 4 and 8 to 10, the waste receiving surface 14 of the bowl portion 6 has a shelf-like surface 36, an inclined surface 38, from an upper edge and an outer edge toward a lower edge and an inner edge. Each of the connecting surfaces 40 is provided symmetrically.
As shown in FIG. 9, the shelf surface 36 of the waste receiving surface 14 has a relatively small inclination obliquely downward with respect to the horizontal plane H from the outer edge connected to the shelf surface 16 a of the shelf 16 to the inner edge. It is inclined at an angle β1.
Further, as shown in FIG. 9, the inclined surface 38 of the waste receiving surface 14 is formed at the lower edge and the inner edge of the shelf surface 36 and is larger than the inclination angle β1 of the shelf surface 36 with respect to the horizontal plane H. At a tilt angle β2 (> β1), it is greatly inclined below the shelf surface 36.
As shown in FIG. 9, the connection surface 40 of the waste receiving surface 14 is formed so as to connect the inner edge and the lower edge L2 of the inclined surface 38 to the upper edge L1 of the pot 12.
Here, the angle β1 shown in FIG. 9 is preferably set to 5 degrees to 15 degrees, and most preferably set to 5 degrees to 10 degrees.
The angle β2 shown in FIG. 9 is preferably set to 20 degrees to 40 degrees, and most preferably set to 20 degrees to 30 degrees.

Next, as shown in FIG. 8, the inclined surface 38 of the waste receiving surface 14 is not formed in the front region F and the rear region B of the bowl portion 6 and the left and right side regions LM and RM of the bowl portion 6. Is formed.
As shown in FIGS. 8 and 9, a width (inclination width) that inclines toward the center O1 direction of the pot 12 from the upper edge and the outer edge L3 to the lower edge and the inner edge L2 of the inclined surface 38 of the waste receiving surface 14. d3) is set to be smaller as the inclined surface 38 is located from the front side to the side of the pot 12.

Next, as shown in FIG. 2 and FIG. 3, upper edges L1 of both side walls 12b and 12c (side wall surfaces) of the pot 12 rise from the front side toward the rear side.
As shown in FIG. 10, the length d4 in the left-right direction of the connection surface 40 of the waste receiving surface 14 in the left and right side regions LM, RM of the bowl portion 6 is the left-right direction of the center O1 in the front-rear direction of the pot portion 12. Is largest at the connection surface 40a connected to the upper edge L1 of the pot portion 12 located at.

Next, as shown in FIGS. 8, 10 and 11A, the bottom wall 12a of the pot 12 is formed ahead of the drain port h of the pot 12 to which the inlet 8a of the drain trap line 8 is connected. And a rear bottom surface portion 12f formed behind the drain port h. Further, a guide portion G is provided at a tip end portion T of the pot portion 12 located in front of the front bottom surface portion 12e of the pot portion 12.
As a result, as shown in FIG. 7B, FIG. 10 and FIG. 11A, the washing water W3 after the first rim spouting water W1 and the second rim spouting water W2 have joined together is located on the right side of the bowl 6 behind the pot 12. After being guided to the rear region RB, in the pot portion 12, when a part of the washing water W3 flows down from the rear side into the pot portion 12 as the water flow f3, the water flows along the wall surface of the rear wall 12d of the pot portion 12. It is guided to the side bottom surface 12f.
Further, as shown in FIGS. 7B, 10 and 11A, a part of the combined cleaning water W3 guided to the right rear region RB of the bowl portion 6 flows from the left rear region LR of the bowl water 6 after the merging. After turning to the left side area LM, when flowing into the pot portion 12 from the left side, in the pot portion 12, a part of the washing water W3 becomes a water flow f4 and the pot behind the front bottom surface portion 12e of the pot portion 12 as the water flow f4. The water flow f4 flowing downward from the wall surface of the left side wall 12b of the portion 12 toward the front bottom surface portion 12e forward and landing on the front bottom surface portion 12e is guided to the guide portion G of the tip end portion T. .

Next, as shown in FIG. 8, FIG. 10 and FIG. 11A, the guide portion G at the distal end portion T of the pot portion 12 of the bowl portion 6 is directed upward from below to a lower rising portion G1 and an upper widening portion. G2.
First, as shown in FIGS. 10 and 11A, the lower rising portion G1 of the guide portion G of the tip portion T of the pot portion 12 is provided in front of the front bottom surface portion 12e, and is located in the right rear area of the bowl portion 6. After the water flow f4 (see FIG. 7B), which is a part of the combined washing water W3 led to the RB, turns from the left rear region LR of the bowl portion 6 to the left region LM, and then returns to the bottom in the pot portion 12 from the left side. When the water flow f4 of the washing water W3 flows toward the front side inside the pot portion 12 when flowing toward the bottom surface region (front side bottom portion 12e) on the front side of the drain port h of the wall 12a, the inside of the pot portion 12 The third cleaning water W3 can be raised on the front side.
Further, the upper widening portion G2 of the guide portion G at the tip end portion T of the pot portion 12 is further provided above the lower rising portion G1, and the third washing water rising by the lower rising portion G1. A flow path is formed that expands in the left-right direction while guiding the water flow f4 of W3 upward.

Further, as shown in FIG. 10, each of the lower rising portion G1 and the upper widening portion G2 of the guide portion G is a bent portion formed so as to protrude forward at the tip end portion T of the pot portion 12. G3 and G4 are provided.
Here, as shown in FIG. 10, the curvature radius ρ3 in plan view at the front end of the curved portion G3 of the lower rising portion G1 is larger than the curvature radius ρ4 in plan view of the front end of the curved portion G4 of the upper widened portion G2. It is set to be small (ρ3 <ρ4).
Further, the curvature radius ρ3, ρ4 in plan view at the front end of each of the curved portions G3, G4 of the lower rising portion G1 and the upper widened portion G2 is such that the curved portions G3, G4 are located on the bottom side of the pot portion 12. As the bent portions G3 and G4 are positioned on the upper side of the pot portion 12, they are set to be larger.

Next, the operation of the flush toilet 1 according to one embodiment of the present invention will be described with reference to FIGS. 1 to 11B.
First, as shown in FIG. 7A, the second rim water discharge W2 is discharged from the second rim water discharge port 22 to the rear of the pot portion 12 in the bowl portion 6, and is widened in advance toward the right rear region RB of the bowl portion 6. A film-like water flow f2 is formed. Thereafter, the swirling flow f1 swirling from the left front region LF in the bowl portion 6 to the right side region RM via the right front region RF is formed by the first rim water discharge W1 also discharged forward from the first rim water discharge port 20. Is done.
Then, as shown in FIG. 7B, when the swirling flow f1 of the first rim water discharge W1 reaches the vicinity of the second rim water discharge port 22, the water is discharged in advance toward the right rear region RB of the bowl portion 6, and the first rim water discharge W1 is formed. And intersects and interferes with the water flow f2 of the second rim water discharge W2 that is transverse to the turning direction (see FIG. 7B).
As a result, as shown in FIG. 7B, the water flow f2 of the second rim water discharge W2 discharged from the second rim water discharge port 22 subsequently merges with the swirl flow f1 of the first rim water discharge W1 to form the basin portion 12. The washing water W3 is guided to the right rear region RB of the bowl portion 6 on the rear side and becomes the combined washing water W3. Then, a part of the washing water W3 forms a water flow f3 (downflow) flowing down from the rear side in the pot portion 12 (see FIGS. 8, 10, and 11A).
Next, as shown in FIG. 7B, another part of the combined washing water W3 turns from the left rear region LR of the bowl portion 6 to the left region LM, and then returns to the front bottom surface in the pot portion 12. A water flow f4 is formed that flows from above the left side wall 12b behind the portion 12e toward the front bottom surface portion 12e of the pot portion 12 forward and downward (see FIGS. 8, 10 and 11A).
As a result, the water flow f4 lands on the front bottom surface portion 12e of the pot portion 12, and is then guided to the tip T of the pot portion 12 in front of the water flow f4.
Then, when the water flow f4 reaches the tip T of the pot 12, the guide flute G of the tip T of the pot 12 raises the water flow f4 ( An upward flow is formed.
At this time, as shown in FIG. 7B, the remaining water flow f5 of the washing water W3 after the merging of the right rear region RB of the bowl portion 6 is changed from the left rear region LB of the bowl portion 6 to the front region F through the left region LM. To the water flow f6 by quickly branching off from the swirl flow f1 of the first rim water discharge W1 in the front region F of the bowl portion 6 and merging with the flowing water flow. Then, when the water flow f6 flows into the pot portion 12 from the front side, a water flow f6 is formed which pushes the water flow f4 (upflow) rising at the front end T in the pot portion 12 backward. (See FIGS. 8, 10, and 11A).
As a result, as shown in FIG. 11A and FIG. 11B, in the pool water in the pot portion 12, the respective water flows f3 to f6 of the washing water W3 after the first rim water discharge W2 and the second rim water discharge W2 join. A water flow (vertical swirling flow) f7 (see FIG. 11B) that rises and flows backward after rising is formed on the front side in the pot portion 12, and a water flow (longitudinal swirling flow) f7 is formed on the rear side in the pot portion 12. A water flow (longitudinal swirling flow) f8 (see FIG. 11B) that flows forward after the upper and lower sides have descended is formed.
Then, the dirt in the pot portion 12 is discharged from the drain port h to the drain trap line 8 by the vertical swirling flows f7, f8 in the vertical direction and the front-rear direction.

  Further, even when the washing water overflows or scatters from the jar 12, the washing water is emptied by the shelf-shaped surface 36, the inclined surface 38, and the connecting surface 40 of the jar 12 and the waste receiving surface 14. It is possible to return to the inside of the part 12, and it is possible to suppress the remaining of dirt in the bowl part 6 without weakening the vertical swirling of the vertical swirling flows f7 and f8 in the pot part 12.

According to the flush toilet 1 according to the embodiment of the present invention described above, the second rim water discharge port 22 is provided on the rim portion 18 on one side in the left-right direction (the right side region RM) of the bowl portion 6, and the pot portion 12 is provided. Is disposed forward of the rear end position P2.
As a result, a part of the washing water W2 of the second rim water spout W2 before merging, which has been discharged from the second rim water outlet 22 to the rear of the pot portion 12 in the bowl portion 6, is transferred from the rear portion of the pot portion 12 to the pot portion 12. A water flow f2a (see FIG. 7A) that flows into the inside appropriately can be formed. Thus, a part of the washing water W3 after the first rim water discharge W1 and the second rim water discharge W2 have joined, and a moderate descending flow f3 with respect to the pooled water on the rear side in the pot portion 12 (FIG. 8). , FIG. 10 and FIG. 11A).
Further, with respect to the other part of the washing water W3 after the merging, the swirl is swirled from the left rear region LR of the bowl portion 6 to the left region LM, and then left in the pot portion 12 (the pot portion 12). The water flow f4 flowing from the upper side of the left side wall 12b of the pot portion 12 behind the front bottom surface portion 12e toward the front bottom surface portion 12e can be formed (see FIGS. 8, 10 and 11A). This allows the water flow f4 to reach the front bottom surface portion 12e of the pot portion 12 and then efficiently guide the water flow f4 to the guide portion G at the front end T of the pot portion 12 in front of the water flow f4.
Then, when the water flow f4 reaches the tip T of the pot 12, the guide flute G of the tip T of the pot 12 raises the water flow f4 ( As a result, it is possible to effectively promote the vertical swirling of the vertical swirling flows f7 and f8 formed in the pot portion 12 in the up-down direction and the front-rear direction.
At this time, as shown in FIG. 7B, the remaining water flow f5 of the washing water W3 after the merging of the right rear region RB of the bowl portion 6 is changed from the left rear region LB of the bowl portion 6 to the front region F through the left region LM. To the water flow f6 by quickly branching off from the swirl flow f1 of the first rim water discharge W1 in the front region F of the bowl portion 6 and merging with the flowing water flow. Then, the water flow f6 flows into the pot portion 12 from the front side, thereby forming a water flow f6 that pushes the water flow f4 (upflow) rising at the front end T in the front portion of the pot portion 12 backward. (See FIGS. 8, 10 and 11A).
As a result, as shown in FIG. 11A and FIG. 11B, in the pool water in the pot portion 12, the respective water flows f3 to f6 of the washing water W3 after the first rim water discharge W2 and the second rim water discharge W2 join. A water flow (vertical swirling flow) f7 (see FIG. 11B) flowing upward and rearward on the front side in the pot portion 12 can be formed, and on the rear side in the pot portion 12 the front side after descending. (Vertical swirling flow) f8 (see FIG. 11B).
Therefore, the flows (vertical swirling flows) f7 and f8 vertically swirling in the front-rear direction and the up-down direction can be stably formed in the entire reservoir water in the pot portion 12, and the swirling of the vertical swirling flows f7 and f8 can be performed. Power can also be increased.
As a result, the first washing water W1 before the first rim spout W1 discharged from the first rim spout 20 merges, and the second cleaning water W2 before the second rim spout W2 discharged from the second rim spout 22 merges. The washing water W2 and the washing water W3 after the first rim spouting water W1 and the second rim spouting water W2 have joined together are stable in the vertical swirling flow f7, f8 in the entire pooled water in the pot portion 12. Can contribute to the formation.

Further, according to the flush toilet 1 of the present embodiment described above, the first rim spout 20 is provided on the rim 18 on the other side (left side area LM) of the bowl 6 in the left-right direction. It is arranged ahead of the front end T.
Thus, the water flows f5 and f6 of the washing water W3 after the merging of the first rim water discharge W1 and the second rim water discharge W2 discharged from the first rim water discharge port 20 (see FIGS. 7B, 8, 9, and 11A). ) Can effectively flow from the front toward the pot portion 12, and can join the upward flow f4 (see FIGS. 8, 9, and 11 </ b> A) rising on the front side in the pot portion 12.
Thereafter, the combined washing water W3 is pushed toward the drain port h (the entrance 8a of the drain trap line 8) in the back and lower pot portion 12, so that the accumulated water rises in the front side in the pot portion 12. A water flow f7 (see FIG. 11B) is formed, and a water flow f8 (see FIG. 11B) for lowering the stored water at the rear side in the basin portion 12 is formed, thereby effectively forming strong vertical swirling flows f7 and f8. be able to.
Therefore, since strong vertical swirling of the washing water can be realized in the pot portion 12, the performance of discharging dirt from the inside of the pot portion 12 to the drain trap pipeline 8 can be improved.

According to the flush toilet 1 according to the present embodiment, first, the water flow f4 of the washing water W3 reaching the front end T from the front bottom surface 12e of the pot 12 by the lower rising portion G1 of the guide portion G. Can be reliably guided upward from below.
Next, the water flow f4 of the cleaning water W3 raised at the lower rising portion G1 can be expanded in the left-right direction by the upper widening portion G2 of the guide portion G.
Thus, on the front side in the pot portion 12, the water flow f4 of the washing water W3 that rises on the lower rising portion G1 of the guide portion G and spreads in the left-right direction at the upper widening portion G2 and the washing water that flows from the front of the pot portion 12. The water flow f6 of W3 can be more reliably merged.
Therefore, a water flow f7 (see FIG. 11B) for raising the stored water is formed on the front side in the pot portion 12, and a water flow f8 (see FIG. 11B) for lowering the stored water is formed on the rear side in the pot portion 12, and the strength is increased. The vertical swirling flows f7 and f8 can be formed more effectively and reliably.

In addition, according to the flush toilet 1 according to the present embodiment, the curvature radius ρ3 in plan view of the front end of the curved portion G3 of the lower rising portion G1 of the guide portion G is the same as the front end of the curved portion G4 of the upper widened portion G2. The radius of curvature is set to be smaller than the radius of curvature ρ4 in plan view (ρ3 <ρ4).
As a result, when the water flow f4 of the washing water W3 flowing from the left side (above the left side wall 12b) toward the front bottom surface portion 12e into the pot portion 12 reaches the tip portion T of the pot portion 12, it becomes tapered. The washing water W3 can be gathered by the bent portions G3 and G4 of the above, and the washing water W3 temporarily stays in the bent portion G3 on the bottom side of the pot portion 12, thereby efficiently forming the upward flow f4. Can be.
Further, the radius of curvature ρ3, ρ4 in plan view at the front ends of the bent portions G3, G4 can be set so as to be larger as the bent portion is located above the pot portion 12, so that the water flow of the washing water W3 is increased. f4 spreads in the left-right direction on the upper side of the pot portion 12 of the bent portion G4 and easily rises.
Therefore, the ascending flow f4 of the washing water W3 and the water flow f6 flowing from the front of the pot portion 12 surely merge, so that the entire reservoir water is raised on the front side and lowered on the rear side in the pot portion 12. Strong vertical swirling flows f7 and f8 can be formed.

In addition, according to the flush toilet 1 according to the present embodiment, as shown in FIGS. 7B, 8, 10, and 11 </ b> A, particularly, from the second rim spout 22 to the rear of the pot 12 in the bowl 6. When the washed water W3 after the spouted second rim spout W2 and the first rim spout W1 merges into the pot 12 from behind the pot 12, the pool water on the rear side of the pot 12 is formed. , A downwardly flowing water flow (downflow f3) can be reliably formed. Thereafter, when the water flow f3 of the washing water W3 reaches the rear bottom surface portion 12f in the pot portion 12, the rear downward flow f3 in the pot portion 12 can be swirled forward.
Therefore, strong vertical swirling flows f7 and f8 (see FIG. 11B) in the front-rear direction due to the descending flow f3 of the washing water W3 can be easily formed in the pot portion 12.

Reference Signs List 1 flush toilet 2 toilet body 4 headrace 4a inlet of headrace 6 bowl part 8 drain trap pipe (drain trap part)
8a Drain trap pipe entrance 8b Drain trap pipe descending path 8c Drain trap pipe rising path 10 Water storage tank (wash water source)
12 Pot 12a Bottom of the pot (bottom of the pot)
12b Left wall of jar 12c Right wall of jar 12d Rear wall of jar 12e Front bottom of jar 12f Rear bottom of jar 14 Soil receiving surface 14a Upper edge of sewage receiving surface 16 Shelf 16a Shelf 18 Rim section 18a Rim inner wall surface (Rim wall surface)
18b Rear end of rim inner wall surface 18c Predetermined rim inner wall surface (predetermined rim wall surface)
20 1st rim spout (1st rim spout)
22 2nd rim spout (2nd rim spout)
22a Bottom surface of second rim water outlet 24 common waterway 26 first rim waterway 28 second rim waterway 28a inlet of second rim waterway 30 outer waterway of second rim waterway 32 second rim waterway 1 bent water conduit 34 second bent water conduit of second rim water conduit 34a upstream water conduit of second bent water conduit 34b downstream water conduit of second bent water conduit 36 shelf 38 inclined surface 40 connecting surface 40a pot Connection surface of the waste receiving surface connected to the region near the center in the front-rear direction of the upper edge of the portion A1 Open end surface of the second rim water discharge port B Rear region of the bowl portion B1 Bend portion of the first bent waterway B2 Second bent waterway Bend portion of water channel C1 Channel center axis of the second rim water discharge port and the downstream side water channel of the second bent water channel D Diffusion portion (downflow promoting portion, turning maintaining portion)
d1 Flow path width of the upstream headrace of the second bent headrace d2 Flowpath width of the downstream headrace of the second bent headrace d3 Slant width of the inclined surface of the waste receiving surface d4 Soil in the left and right side regions of the bowl portion The length in the left-right direction of the connecting surface of the receiving surface E1 The front end (downstream end) of the outer headrace, the upstream end of the first bent headway E2, the downstream end of the first bent headway F Front area of the bowl portion f1 First rim water discharge Swirling flow (first washing water)
f2 Water flow of the second rim spout (second wash water)
f2a Water flow inside the second rim water discharge (water flow of the second rim water discharge in the first direction)
f2b Outward water flow of the second rim water discharge (water flow of the second rim water discharge in the first direction)
f3 Part of the flow of the wash water after the first rim water discharge and the second rim water discharge merge (second wash water)
f4 Partial flow of the wash water after the first rim spout and the second rim spout merge (third wash water)
f5 Partial flow of wash water after merging first rim water discharge and second rim water discharge f6 Partial flow of wash water after merging first rim water discharge and second rim water discharge (first wash water)
f7 Longitudinal swirl flow formed in the pot part f8 Longitudinal swirl flow formed in the pot part G Guide part at the tip part of the pot part G1 Lower rising part of the guide part at the tip part of the pot part G2 At the tip part of the pot part Upper part of the widened part of the guide part G3 Bent part of the lower rising part in the guide part at the tip part of the pot part G4 Bent part of the upper part of the widened part of the guide part at the tip part of the pot part H Horizontal plane h Drainage L Bowl part Left side area LB Left rear area of bowl part LF Left front area of bowl part LM Left side area of bowl part L1 Boundary line between pot part and waste receiving surface, upper edge of pot part, lower edge of waste receiving surface L2 waste receiving part Lower edge and inner edge of the inclined surface of the surface L3 Upper edge and outer edge of the inclined surface of the waste receiving surface M Intermediate region between the front region and the rear region of the bowl portion O Center of the bowl portion O1 Center of front and rear direction of the pot portion P1 Front and rear position of the first rim spout P2 Above the pot And the rear end position Q1 first rim water spouting flow rate (instantaneous flow rate)
Q2 Flow rate of the second rim spout (instantaneous flow rate)
Q2a Flow rate of the second rim spout in the first direction (instantaneous flow rate)
Q2b Flow rate of the second rim spout in the second direction (instantaneous flow rate)
R Right side area of bowl part RB Right rear area of bowl part RF Right front area of bowl part RM Right side area of bowl part S1 Inclined surface (diagonally backward from the second rim spout on the dirt receiving surface in the right rear part of bowl part) Surface formed toward
T Tip of the pot (front end of the pot)
T1 Tangent plane u1 Flow rate u2 Flow rate V1 Water discharge amount V2 Water discharge amount W Wash water W0 Reservoir W1 First wash water, first rim water discharge W2 Second wash water, second rim water discharge W2a Second rim water discharge in the first direction W2b Second rim water discharge in two directions W3 Wash water after merging of first rim water discharge and second rim water discharge WL Water level (water surface)
X Center axis in the horizontal left and right direction of the bowl part Y Center axis in the horizontal front and rear direction of the bowl part Z Center axis in the vertical direction passing through the center of the bowl part α1 Angle β1 Inclination angle β2 Inclination angle ρ1 The second rim spout is disposed. The radius of curvature of the predetermined inner surface of the rim in plan view ρ2 The radius of curvature of the rear end of the inner surface of the rim of the rim portion in plan view ρ3 The radius of curvature of the lower rising portion of the guide portion at the tip of the pot portion in plan view. ρ4 The radius of curvature of the curved portion of the upper widened portion in the guide portion at the tip of the pot portion in plan view.

Claims (9)

A flush toilet that is flushed with flush water supplied from a flush water source and discharges waste,
A bowl-shaped waste receiving surface, a rim portion formed above the waste receiving surface, and a pot portion provided below the waste receiving surface to store stored water and form sealed water. Bowl part,
A drain trap section having an inlet connected to the jar section for discharging waste;
A first rim spouting section provided on the rim section for performing a first rim spout for spouting washing water toward the front, wherein the first rinsing water, which is the first rim spouting, is provided from the front of the pot section. A first rim spout having a first rim spout for flowing into the basin;
A second rim water discharging portion provided on the rim portion for discharging the second rim water, wherein a second washing water, which is a part of the second rim water discharging portion, flows into the pot portion from the rear of the pot portion; The third washing water, which is a part of the remaining part of the second rim spouting water behind the pot, is allowed to flow into the pot from above and from the side of the pot and downward and forward from the pot. And a second rim water discharge section having a second rim water discharge port leading to a front end portion of the front pot section,
A flush toilet, wherein a front end of the vase portion is provided with a guide portion at a front side of the vase portion for guiding the third washing water flowing into the vase portion to rise.   2. The flush toilet according to claim 1, wherein the second rim spout is provided on the rim on one side of the bowl in the left-right direction, and is disposed forward of a rear end of the pot. 3. The pot includes a bottom surface, a side wall surface formed on a side of the bottom surface, the front end portion formed at the front end of the side wall surface, and the guide portion formed at the front end portion. Yes,
The pot portion allows the third rinsing water of the second rim spout discharged from the second rim spout port to flow from above the side wall surface of the pot portion toward the bottom surface of the pot portion below, and The flush toilet according to claim 1 or 2, wherein the flush toilet is configured to be guided from a bottom surface to the guide portion at the distal end portion. The first rim spout is provided on the rim on the other side in the left-right direction of the bowl, and is disposed forward of a front end of the pot.
When the first washing water, which is the first rim spout spouted from the first rim spout, flows into the jar from the front of the jar, the first washing water and the jar are provided. The flush toilet according to any one of claims 1 to 3, wherein the flush toilet is configured to join the upward flow of the third flush water on the front side of the section.   5. The flow path according to claim 1, wherein the guide portion is configured to guide the third cleaning water reaching the front end portion from the bottom surface of the pot portion to extend upward and downward in the left-right direction while guiding the third cleaning water upward. The flush toilet described.   The guide portion is provided below the lower rising portion that forms a flow path that raises the third cleaning water so as to guide the third washing water upward from below, and the guide portion is provided above the lower rising portion and forms the lower portion. The flush toilet according to any one of claims 1 to 5, further comprising: an upper widening portion that forms a flow path that widens the third flushing water that is rising by the side rising portion in the left-right direction.   The guide portion has a curved portion formed so as to protrude forward at a tip portion of the pot portion, and a curvature radius in a plan view at a front end of the curved portion is such that the bent portion is the pot portion. 7. The device according to claim 1, wherein the position is set to be smaller as the position is closer to the bottom surface of the portion, and is set to be larger as the bent portion is positioned above the pot portion. A flush toilet according to the item. The bottom surface of the pot portion includes a front bottom surface portion formed ahead of the entrance of the drain trap portion,
The pot portion is configured to apply the third washing water spouted from the second rim spout from the side wall surface of the pot portion behind the front bottom surface portion of the bottom surface of the pot portion. The flush toilet according to any one of claims 1 to 7, wherein the flush toilet is configured to flow toward a front bottom surface portion and to guide the front end portion to the guide portion at the front end portion. The bottom surface of the vase portion includes a rear bottom surface portion formed behind the entrance of the drain trap portion,
The said pot part is comprised so that the said 2nd washing | cleaning water discharged from the said 2nd rim water outlet from the said 2nd rim spout may be guided to the said rear bottom surface part from the back of the said pot part. Flush toilet.

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