JP2020051053A - Water closet - Google Patents

Abstract

To provide a water closet capable of ensuring washing performance based on the washing capability of a bowl part and dirt discharge performance based on the vertical swirling power of a vertical swirling flow in the pot part while retaining the design.SOLUTION: A first rim water discharge port and a second rim water discharge port 22 are respectively provided in a rim part on one side and the other side in the longitudinal direction of a bowl part 6. The second rim water discharge port is arranged behind the first rim water discharge port and ahead of the position P2 of the rear end of a pot part and is so configured as to perform second rim water discharge W2 toward a rear area of the bowl part behind the pot part and make a water flow f2a which is part of the second rim water discharge discharged into the rear area of the bowl part flow into the pot part earlier than the first rim water discharge W1 discharged from the first rim water discharge port, while a water flow f2b which is the remainder of the second rim water discharge discharged into the rear area of the bowl part is led to the side of a rim wall surface 18a in the rear area of the bowl part by a swirling flow f1 of the first rim water discharge.SELECTED DRAWING: Figure 5

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 toilets described in these Patent Documents 1 and 2, two rim water outlets, a first rim water outlet and a second rim water outlet, and a water supply 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.
Further, in the conventional flush toilet described in Patent Documents 1 and 2 described above, the first rim spout is disposed on the rim wall surface on the left side and the rear side of the bowl portion when the toilet body is viewed from the front. I have. As a result, the washing water is discharged from the first rim water discharge port toward the front as the first rim water discharge, and a swirling flow is formed in the bowl portion.
On the other hand, in the conventional flush toilets described in Patent Literatures 1 and 2 described above, the second rim water outlet is disposed on the rim wall surface on the right rear side of the bowl portion of the toilet body. Thus, the washing water is discharged from the second rim water outlet as the second rim water in the same swirling direction as the swirling flow of the first rim water discharging from the first rim water outlet, and then flows into the pot portion. Then, the washing water of the second rim spout that has flowed into the pot forms a vertical swirling flow that swirls in the vertical direction, and the vertical swirling flow allows the stored water in the pot to be vertically stirred. ing.
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, the rim spout, including the conventional flush toilet described in Patent Literatures 1 and 2 described above, is generally a place where dirt easily adheres. In particular, since the second rim water outlet of the conventional flush toilet described in Patent Documents 1 and 2 described above is disposed on the rim wall surface on the rear side of the bowl portion, it is accessed from the front of the bowl portion. It is easy for the user to visually recognize the presence of the second rim spout. As a result, there is a problem that the user feels uncomfortable and the design of the flush toilet is reduced.
In the conventional flush toilet described in Patent Document 1 described above, the second rim spout spouted from the second rim spout turns the first rim spout spouted from the first rim spout. When water is discharged in the same swirling direction as the flow, centrifugal force acts and it is difficult for the water to flow into the pot from the rear side. As a result, there is a problem that the water force for forming the vertical swirling flow in the pot portion is weakened.
Further, in the conventional flush toilet described in Patent Document 2 described above, the second rim spout from the second rim spout is spouted slightly forward in the left direction, and a part of the water is discharged from the first rim spout. While merging with the first rim spout from the spout, the other part flows directly into the pot. As a result, unwashed portions are likely to occur near the left and right rear in the rear region of the bowl portion, and there is a problem that it is difficult to secure a water force for forming a sufficient vertical swirling flow even in the pot portion.

  Therefore, the present invention has been made in order to solve the above-described problems of the prior art, and while ensuring designability, the cleaning performance by the cleaning power of the bowl portion and the vertical swirling force of the vertical swirling flow in the jar portion. It is an object of the present invention to provide a flush toilet capable of ensuring waste discharge performance.

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 bowl portion provided with a rim portion that forms a rim wall surface that rises upward and a pot portion that is provided below the waste receiving surface and that stores stored water to form sealed water; A drain trap portion that is connected to an inlet to discharge waste, and a first rim water outlet provided on the rim portion on one side in the left-right direction of the bowl portion, and is provided forward from the first rim water outlet. A first rim spouting section for spouting the first rim, wherein a swirling flow swirling along the bowl section is formed, and the washing water swirled in a front region of the bowl section ahead of the pot section. Part of the vase from the front of the vase And a second rim water outlet provided on the rim on the other side in the left-right direction of the bowl portion, and a second rim water outlet provided from the second rim water outlet. A second rim spout for performing rim spouting, wherein the second rim spout is allowed to flow into the pot, so that the first rim spout spouted from the first rim spout is moved up and down into the pot. And a second rim water discharge portion that forms a vertical swirling flow in a direction, wherein the second rim water discharge port is disposed rearward of the first rim water discharge port and forward of a rear end of the pot portion. The second rim water outlet performs the second rim water discharge toward a rear region of the bowl portion rearward of the pot portion, and the second rim water discharged to the rear region of the bowl portion. A part of the water is discharged from the first rim water outlet. While the second rim water discharged into the rear area of the bowl portion is caused to flow into the pot portion earlier than the first rim water discharge, the rim in the rear region of the bowl portion is swirled by the first rim water discharge. It is characterized in that it is configured to be guided to the wall surface side.
In the present invention configured as described above, the second rim water outlet is disposed rearward of the first rim water outlet and forward of the rear end of the vase portion. Part of the second rim water discharged toward the rear area of the rear bowl portion directly flows down into the pot portion earlier than the first rim water discharged from the first rim water discharge port. can do. Thereby, a part of the second rim spout in the rear area of the bowl portion can flow into the pot portion with a stronger force earlier than the first rim spout.
Therefore, in the initial stage of cleaning the bowl portion, a part of the second rim spout in the rear region of the bowl portion on the rear side of the pot portion causes the flow (downflow) flowing downward from behind the pot portion to be early. Can be formed.
Therefore, when the first rim spout spouted from the first rim spout and swirled into the front area of the bowl portion flows into the pot portion from the front of the pot portion, the downward flow of the second rim spout at the rear side in the pot portion. At the same time, a flow (longitudinal swirling flow) vertically swirling in the front-rear direction and up-down direction can be reliably formed in the entire reservoir water in the pot portion. Thus, after the first rim water discharge and the second rim water discharge merge, the waste agitated by the vertical swirling flow in the pot portion can be reliably discharged to the drain trap portion.
Further, the first rim water discharged from the first rim water discharge port provided on the rim portion on one side in the left-right direction of the bowl portion turns along the bowl portion, and the swirling flow of the first rim water discharge flows into the bowl portion. After passing through the vicinity of the second rim water outlet of the rim part on the other side in the left-right direction of the part, the water merges with the water flow of the second rim water discharged from the second rim water outlet. At this time, since the second rim water discharge port is located behind the first rim water discharge port and forward of the rear end of the pot, the swirling flow of the first rim water discharge water that merges with the second rim water discharge water flow is formed. The second rim spout in the rear region of the bowl portion can also be appropriately guided to the rim wall surface in the rear region of the bowl portion.
Therefore, in the rear area of the bowl portion, a part of the flow of the second rim water discharged early into the pot portion and the flow of the remaining second rim water discharged to the rim wall surface side of the rear area of the bowl portion, A wide area can be washed over the whole area in the front and rear direction and the left and right direction of the rear area of the bowl portion.
Thus, it is possible to ensure the cleaning performance by the cleaning power of the bowl portion and the waste discharge performance by the vertical swirling force of the vertical swirling flow in the jar portion while securing the design.

In the present invention, preferably, the second rim spout is located rearward of a front end of the pot.
In the present invention thus configured, since the second rim water outlet is disposed behind the front end of the pot, the second rim water discharged from the second rim water outlet is located in the rear area of the bowl portion. It is possible to prevent the water from flowing down into the pot on the upstream side.
Therefore, in the initial stage of cleaning the bowl portion, a part of the second rim spout in the rear region of the bowl portion on the rear side of the pot portion causes the flow (downflow) flowing downward from behind the pot portion to be early. Can be formed.
Therefore, after the swirling flow of the first rim spout spouted from the first rim spout merges with the water flow of the second rim spout, it turns to the front region of the bowl portion and flows into the pot portion from the front of the pot portion. At this time, a flow (vertical swirling flow) vertically swirling in the front-rear direction and up-down direction can be more reliably formed in the entire reservoir in the pot portion.
In addition, since the second rim spout in the rear area of the bowl portion after merging with the swirl flow of the first rim spout can be appropriately guided to the rim wall surface side, the second rim spout flowing down into the pot portion at an early stage. The cleaning performance of the rear area of the bowl portion can be improved by a part of the flow and the remaining flow of the second rim spouting water guided to the rim wall surface side of the rear area of the bowl portion.

In the present invention, preferably, the second rim spout is disposed rearward of the front-rear center of the pot portion.
In the present invention configured as described above, the second rim spout is disposed behind the center in the front-rear direction of the vase portion. Therefore, at the initial stage when the bowl portion is washed, the rear side of the vase portion is provided. Due to part of the second rim water discharge in the rear area of the bowl portion, a flow (downflow) flowing downward from behind the pot portion is easily formed.
Therefore, when the first rim spout spouted from the first rim spout and swirled into the front region of the bowl portion flows into the pot portion from the front of the pot portion, the downward flow of the second rim spout at the rear side in the pot portion At the same time, it is possible to promote the formation of a flow (vertical swirling flow) vertically swirling in the front-rear direction and the up-down direction in the entire reservoir in the pot portion.

In the present invention, preferably, the opening end face of the second rim spout is directed obliquely rearward so that the water flow of the second rim spout crosses the left and right direction of the rear area of the bowl portion.
In the present invention configured as above, since the opening end face of the second rim spout is directed obliquely rearward so that the water flow of the second rim spout crosses the left and right direction of the rear area of the bowl portion. The second rim water discharged from the second rim water outlet can reach the rear area of the bowl portion on the rear side of the pot portion with the shortest distance.
Therefore, a part of the second rim spout in the rear area of the bowl portion can flow into the pot portion with a strong force earlier than the first rim spout, and is discharged from the first rim spout to be forward of the bowl portion. When the first rim spout that has swirled into the region flows into the pot from the front of the pot, along with the downward flow of the second rim spout at the rear side of the pot, the entire pooled water in the pot is longitudinally and vertically. Thus, the formation of a vertically swirling flow (longitudinal swirling flow) can be effectively promoted.
In addition, the second rim spout in the rear area of the bowl portion after merging with the swirling flow of the first rim spout can be guided to the entire left and right direction of the rear area of the bowl portion while appropriately leading to the rim wall surface side. .
As a result, a part of the second rim spout flowing down into the pot portion at an early stage and the remaining flow of the second rim spout being guided toward the rim wall surface in the rear region of the bowl portion cause the rear region of the bowl portion to flow. Since cleaning can be performed over a wide range in the front-rear direction and the left-right direction, the cleaning performance of the bowl portion can be improved.

In the present invention, preferably, the apparatus further includes a second rim water conduit that guides the cleaning water supplied from the cleaning water source to the second rim water discharge part, and the second rim water conduit is forwardly arranged from its upstream side. A first bent headrace for changing the direction of the washing water flowing toward the rear, and a second bent headrace provided downstream and downstream of the first bent headrace; and the second bent headrace. Is configured to diagonally rearwardly change the washing water flowing rearward by the first bent headrace channel, and the downstream side thereof is connected to the second rim water discharge part.
In the present invention thus configured, the washing water supplied from the washing water source to the second rim conduit flows forward from the upstream side thereof, and flows rearward by the first bent conduit. Thereafter, the washing water that has passed through the first bent headrace is turned obliquely rearward in the second bent headway, and then passes through the second rim spout.
At this time, when the direction is changed from the first bent headrace to the second bent headrace, the flow rate of the washing water can be reduced. Thus, when the second rim spout is discharged from the second rim spout through the second rim spout, the second rim spout is easily diffused radially obliquely rearward from the second rim spout. Therefore, a wide and film-shaped second rim water discharge can be formed.
With these arrangements, the second rim water discharge, which is wider and film-shaped than the first rim water discharge, can be traversed in the swirling direction of the first rim water discharge with a large flow rate at a high speed. The first rim water discharge can be effectively interfered.
Further, a phenomenon (so-called Coanda phenomenon) in which the second rim water discharged from the second rim water outlet is drawn to the rim wall surface of the rim portion near the front and rear of the second rim water outlet can also be effectively suppressed. . Therefore, the second rim spout flows in the same swirling direction together with the swirl flow of the first rim spout, and simply swirls in the rear area of the bowl portion without any of the combined washing water dropping at all. Can be effectively suppressed.

In the present invention, preferably, in the rear region of the bowl portion, a surface formed on the dirt receiving surface of the waste receiving surface obliquely rearward from the second rim water discharge port is inclined upward toward the rear.
In the present invention configured as above, the surface formed diagonally rearward from the second rim water discharge port in the waste receiving surface in the rear area of the bowl portion is inclined upward toward the rear side, so that the bowl portion has Most of the washing water after the interference of the first rim water discharge and the second rim water discharge in the rear area turns to the front side of the bowl along the wall surface of the rim above the waste receiving surface in the rear area of the bowl. Can be suppressed.
Therefore, a part of the washing water passing through the rear region of the bowl portion after the first rim water discharge and the second rim water discharge interfere with each other in the rear region of the bowl portion can be easily dropped into the pot portion. Therefore, it is possible to prevent the washing water in the area behind the bowl portion from simply turning without falling into the pot portion at all.
As a result, in the rear region of the bowl portion, a part of the flow of the second rim water discharged early into the pot portion, and a flow of the remaining second rim discharged water guided to the rim wall surface in the rear region of the bowl portion. This makes it possible to achieve both the washing property of the bowl part and the waste discharge property of the vertical swirling flow in the pot part.

In the present invention, preferably, the rear region of the bowl portion is configured such that an upper edge of the filth receiving surface formed on a circumferential rear side of the bowl portion from a bottom surface of the second rim water discharge port is a front end of the rim. Part is inclined upward toward the rear end.
In the present invention configured as described above, the upper edge of the dirt receiving surface formed from the bottom surface of the second rim spout in the rear region of the bowl portion to the rear side in the circumferential direction of the bowl portion is moved from the front side to the rim portion. Of the washing water after the first rim spout and the second rim spout interfere with each other in the rear area of the bowl portion, the cleaning water in the rear area of the bowl portion has a large height. It is possible to effectively prevent the front rim from turning along the wall surface of the upper rim.
Therefore, after the first rim water discharge and the second rim water discharge merge and interfere in the rear area of the bowl portion, a part of the washing water passing through the rear area of the bowl portion is easily and effectively dropped into the pot. be able to.

  ADVANTAGE OF THE INVENTION According to the flush toilet of this invention, the washing performance by the washing power of a bowl part and the waste discharge performance by the vertical swirling force of the vertical swirling flow in a jar part can be ensured, securing designability.

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 outlet 22 is disposed rearward of the first rim water outlet 20 and forward of the rear end position P2 of the pot portion 12. .
Further, since the second rim water discharge port 22 is disposed behind the center (center O1) in the front-rear direction of the pot section 12, a bowl on the rear side of the pot section 12 is provided at an initial stage when the bowl section 6 is washed. Due to a part of the second rim water discharge W2 in the rear area B of the portion 6, a flow (downflow f2a) flowing downward from behind the pot portion 12 is easily formed.
As a result, the water flow f2a (see FIG. 7A) of a part of the second rim water discharge W2 discharged from the second rim water discharge port 22 toward the rear region B of the bowl portion 6 on the rear side of the pot portion 12 is formed. It is possible to directly flow down into the pot portion 12 earlier than the first rim water discharge W1 discharged from the 1 rim water discharge port 20. Therefore, a part of the water flow f2a of the second rim water discharge W2 in the rear area B of the bowl portion 6 can flow into the pot portion 12 with a strong water force earlier than the first rim water discharge W1.
Further, since the second rim water discharge port 22 is disposed behind the front end T of the pot portion 12, the second rim water discharge W2 discharged from the second rim water discharge port 22 is larger than the rear area B of the bowl portion 6. It is possible to prevent the water from flowing down into the pot portion 12 on the upstream side.
Thus, in the initial stage when the bowl portion 6 is washed, the swirl flow f1 of the first rim water discharge W1 is added to a part of the water flow f2a of the second rim water discharge W2 in the rear region B of the bowl portion 6 on the rear side of the pot portion 12. With respect to the washing water W3 after the water has joined, a flow (downflow f3) that flows downward from behind the pot portion 12 can be formed early (see FIGS. 8, 10, and 11A).
Therefore, after the swirl flow f1 of the first rim water discharge W1 spouted from the first rim water discharge port 20 merges with the water flow f2 of the second rim water discharge W2, the swirl flow f1 flows out of the front region B of the bowl portion 6 on the front side of the pot portion 12. When the water flows into the pot portion 12, the flow (vertical swirl flow f7, f8) that vertically turns in the front-rear direction and the vertical direction is promoted in the entire reservoir water in the pot portion 12, and the water can be more reliably formed. . Thereby, the waste material stirred by the vertical swirling flows f7 and f8 in the pot portion 12 can be reliably discharged to the drain trap pipeline 8.
Further, the first rim water discharge W1 spouted from the first rim water discharge port 20 provided on the rim part 18 on one side (left side area LM) in the left-right direction of the bowl part 6 turns along the bowl part 6. The second rim spouted from the second rim spout 22 after the swirl flow f1 of the first rim spout W1 passes near the second rim spout 22 on the other rim in the left-right direction of the bowl portion 6. It joins the water flow f2 of the water discharge W2 (see FIG. 7B). At this time, since the second rim water discharge port 22 is disposed behind the first rim water discharge port 20 and forward of the rear end position P2 of the pot portion 12, the second rim water discharge port W2 merges with the water flow f2 of the second rim water discharge W2. The swirl flow f1 of the one rim water discharge W1 can also appropriately guide the water flow f5 of the washing water W3 after the merging in the rear region B of the bowl portion 6 to the rim inner wall surface 18a side of the rear region B of the bowl portion 6.
Therefore, in the rear area B of the bowl portion 6, the washing water W3 after the merging of the first rim spouting water W1 and the second rim spouting water W2 flows down into the pot portion 12 at an early stage (water flows f3 and f4). The flow (water flow f5) guided to the rim inner wall surface 18a side of the rear region B of the bowl portion 6 enables a wide range of cleaning in the front-rear direction and the left-right direction of the rear region B of the bowl portion 6.
Thus, it is possible to ensure the cleaning performance by the cleaning power of the bowl portion 6 and the waste discharge performance by the vertical swirling power of the vertical swirling flows f7 and f8 in the jar portion 12 while ensuring the design.

Furthermore, according to the flush toilet 1 of the present embodiment described above, the opening end face A1 of the second rim water discharge port 22 has the water flow f2a of the second rim water discharge W2 (see FIG. 7A) in the rear area B of the bowl portion 6. It is directed obliquely backward so as to cross the left-right direction.
Thus, the water flow f2a of the second rim water discharge W2 discharged from the second rim water discharge port 22 can reach the right rear region RB of the bowl portion 6 on the rear side of the pot portion 12 with the shortest distance.
Therefore, a part of the water flow f2a of the second rim water discharge W2 in the rear region B of the bowl portion 6 can flow into the pot portion 12 with a strong water force earlier than the swirl flow f1 of the first rim water discharge W1.
Therefore, after the swirl flow f1 of the first rim water discharge W1 spouted from the first rim water discharge port 20 merges with the water flow f2 of the second rim water discharge W2, the swirl flow f1 flows out of the front region B of the bowl portion 6 on the front side of the pot portion 12. When the water flows into the vat portion 12, along with the downward flow f3 (see FIGS. 7B, 8, 10, and 11A) of the washing water W3 on the rear side in the vat portion 12, the entire accumulated water in the vat portion 12 is removed. Thus, the formation of the flow (vertical swirl flow f7, f8) vertically swirling in the front-rear direction and the up-down direction can be effectively promoted.
In addition, the swirl flow f1 of the first rim water discharge W1 merges with the water flow f2b of the second rim water discharge W2 in the rear area B of the bowl portion 6, so that the washing water W3 after the merger of the rear area B of the bowl portion 6 flows. While appropriately guiding f4 and f5 (see FIG. 7B) to the rim inner wall surface 18a side, it is also possible to guide the entire rear region B of the bowl portion 6 in the left-right direction.
Thus, as shown in FIG. 7B, in the rear region B of the bowl portion 6, a part of the washing water W3 that flows down into the pot portion 12 at an early stage after the first rim water discharge W1 and the second rim water discharge W2 merge. Flow (water flow f3) and another partial flow (water flow f4, f5) of the washing water W3 guided to the rim inner wall surface 18a side of the rear region B of the bowl portion 6, the rear region B of the bowl portion 6 The cleaning performance of the bowl portion 6 can be improved since the cleaning can be performed over a wide area in the front-rear direction and the left-right direction.

In addition, according to the flush toilet 1 according to the present embodiment, as shown in FIGS. 1 and 5, the flush water W supplied from the water storage tank 10 as the flush water source to the common conduit 24 is the first rim conduit. The first rinsing water W1 supplied to the first rim 26 and the second rinsing water W2 supplied to the second rim conduit 28 are branched.
Then, the second washing water W2 supplied to the second rim water conduit 28 flows from the outer water conduit 30 into the first bent water conduit 32 in the front, and passes through the bent portion B1 of the first bent water conduit 32. Turns 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 passing through 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 outlet 22.
At this time, the second washing water W2 flowing backward from the bent portion B1 of the first bent waterway 32 to the upstream waterway 34a of the second bent waterway 34 is inclined at the bent portion B2 of the second bent waterway 34. When the vehicle is turned backward, the flow rate of the second cleaning water W2 can be reduced.
Thereby, when the second rim water discharge W2 is discharged from the second rim water discharge port 22 through the downstream water conduit 34b which is the diffusion portion D of the second rim water discharge port 22, the second rim water discharge W2 Is easily diffused obliquely rearward from the second rim water discharge port 22, so that the wide and film-like water flow f2 of the second rim water discharge W2 can be formed.
With these, the second rim spout W2, which is wider and film-shaped than the first rim spout W1, can be traversed in the swirling direction of the swirl flow f1 of the first rim spout W1 having a large flow rate at a high speed. The first rim water discharge W1 and the second rim water discharge W2 can be effectively interfered.
Further, a phenomenon (so-called Coanda phenomenon) in which the second rim water discharge W2 discharged from the second rim water discharge port 22 is drawn to the rim wall surface of the rim portion 18 near the front and rear of the second rim water discharge port 22 is effectively suppressed. can do.
Therefore, the second rim spout W2 flows in the same swirling direction together with the swirl flow f1 of the first rim spout W1, and in the rear area B of the bowl portion 6, all of the combined washing water W3 does not fall. In addition, simple turning can be effectively suppressed.

Further, according to the flush toilet 1 according to the present embodiment, the inclined surface S1 formed obliquely rearward from the second rim spout 22 in the waste receiving surface 14 of the rear area B of the bowl portion 6 rises toward the rear side. It is inclined.
As a result, much of the washing water after the first rim water discharge W1 and the second rim water discharge W2 interfere with each other in the rear area B of the bowl portion 6 is removed from the rim above the waste receiving surface 14 in the rear area B of the bowl portion 6. It is possible to prevent the bowl portion 6 from turning forward along the rim inner wall surface 18a of the portion 18.
Therefore, after the first rim water discharge W1 and the second rim water discharge W2 interfere with each other in the rear area B of the bowl 6, one of the cleaning water passing through the inclined surface S1 of the waste receiving surface 14 in the rear area B of the bowl 6 is removed. The part can be easily dropped.
Therefore, it is possible to prevent the washing water W3 after the merging in the rear area B of the bowl portion 6 from simply turning without falling down at all.
As a result, in the rear region B of the bowl portion 6, a part of the flow of the second rim spout W2 (water flow f2a) flowing down into the pot portion 12 at an early stage and a part of the flow of the washing water W3 after the merging (water flow) f3), the remaining flow (water flow f2b) of the second rim spout water W2 guided to the rim inner wall surface 18a side of the rear area B of the bowl portion 6 and the remaining flow (water flow f4, f5) of the washing water W3 after merging. The cleaning performance of the bowl part 6 and the waste discharge property of the vertical swirling flows f7 and f8 (see FIG. 11B) in the basin part 12 due to the combined cleaning water W3 are ensured while ensuring the cleaning performance of the bowl part 6 due to the above. Can be compatible.

Further, according to the flush toilet 1 according to the present embodiment, the waste receiving surface 14 formed on the rear side in the circumferential direction of the bowl 6 from the bottom surface 22a of the second rim spout 22 in the rear area B of the bowl 6. The edge 14 a and the shelf surface 16 a of the shelf 16 are inclined upward from the front side toward the rear end 18 b of the rim inner wall surface of the rim 18.
As a result, much of the washing water after the first rim water discharge W1 and the second rim water discharge W2 interfere with each other in the rear area B of the bowl portion 6 becomes the waste receiving surface 14 and the shelf portion 16 in the rear area B of the bowl portion 6. Can be effectively suppressed from turning forward of the bowl portion 6 along the rim inner wall surface 18a of the rim portion 18 above the rim portion 18.
Therefore, after the first rim water discharge W1 and the second rim water discharge W2 merge and interfere in the rear region B of the bowl portion 6, a part of the washing water W3 passing through the rear region B of the bowl portion 6 is removed. It can be easily made to fall effectively inside.

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 Swirl flow f2 water flow of second rim water discharge f2a inner water flow of second rim water discharge (water flow of second rim water discharge in 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 Partial flow of cleaning water after merging first rim water discharge and second rim water discharge f4 Partial flow of cleaning water after merging first rim water discharge and second rim water discharge f5 First rim water discharge and second water Partial flow of cleaning water after merging of rim water discharge f6 Partial flow of cleaning water after merging of first rim water discharge and second rim water discharge f7 Vertical swirl flow formed in pot part f8 Formed in pot part Vertical swirling flow G Guide part at the tip of the pot part G1 Lower rising part of the guide part at the tip part of the pot part G2 Upper widening part of the guide part at the tip part of the pot part G3 Guide part at the tip part of the pot part G4 Bending portion of the upper widening portion at the guide portion at the tip of the pot H4 Horizontal surface h Drainage L Left area of the bowl section LB Left rear area of the bowl section LF Left front area of the bowl section LM left side area of bowl part L1 Boundary line between jar part and waste receiving surface, jar L2 Lower edge and inner edge of the inclined surface of the waste receiving surface L2 Upper edge and outer edge of the inclined surface of the waste receiving surface M Intermediate region O between the front region and the rear region of the bowl portion O Center of bowl part O1 Center of front and rear direction of pot part P1 Front and rear position of first rim spout P2 Top edge and rear end position of pot part Q1 Flow rate of first rim spout water (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 (7)

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 to form a rim wall surface rising upward, and provided below the waste receiving surface to store stored water and form a water seal. A bowl part with a pot part
A drain trap section having an inlet connected to the jar section for discharging waste;
A first rim spout provided on the rim on one side in the left-right direction of the bowl portion, and a first rim spout configured to perform a first rim spout forward from the first rim spout; A swirl flow that swirls along the bowl portion is formed, and a part of the washing water swirled in the front region of the bowl portion ahead of the pot portion flows into the pot portion from the front of the pot portion. The first rim water discharging part configured as above,
A second rim spout provided on the rim on the other side in the left-right direction of the bowl portion, and a second rim spout configured to discharge the second rim from the second rim spout; A second rim spout section that forms a vertical swirling flow in the pot section together with the first rim spout spouted from the first rim spout by flowing rim spout into the pot section; Has,
The second rim water outlet is disposed rearward of the first rim water outlet and forward of a rear end of the vase portion,
The second rim water discharge port discharges the second rim water toward a rear region of the bowl portion rearward of the pot portion, and discharges the second rim water discharged into the rear region of the bowl portion. With respect to the second rim water discharged into the rear area of the bowl portion, the first rim water discharged from the first rim water discharge port is caused to flow into the pot portion earlier than the first rim water discharged from the first rim water discharge port. A flush toilet configured to be guided to a rim wall surface side of a rear area of the bowl portion by a swirling flow of rim spouting water.   The flush toilet according to claim 1, wherein the second rim spout is disposed rearward of a front end of the pot portion.   The flush toilet according to claim 1 or 2, wherein the second rim spout is disposed rearward of a center in the front-rear direction of the pot portion.   4. An opening end face of the second rim water discharge port is directed obliquely rearward such that a water flow of the second rim water discharge water crosses a left-right direction of a rear region of the bowl portion. A flush toilet according to the item. Furthermore, a second rim water conduit for guiding the cleaning water supplied from the cleaning water source to the second rim water discharging unit is provided,
The second rim water conduit has a first bent water conduit for changing the direction of washing water flowing forward from the upstream side to the front, and a second bent water conduit provided downstream and rearward of the first bent water conduit. And the second bent water conduit is configured to divert the washing water flowing backward by the first bent water conduit diagonally rearward, and the downstream side thereof is the second rim water discharge. The flush toilet according to any one of claims 1 to 4, which is connected to a section.   The rear area of the bowl portion has a surface formed diagonally rearward from the second rim spout on the waste receiving surface, and the surface is inclined upward toward the rear side. Flush toilet.   The rear region of the bowl portion is configured such that an upper edge of the filth receiving surface formed on a rear side in a circumferential direction of the bowl portion from a bottom surface of the second rim water outlet is directed from a front side toward a rear end of the rim portion. The flush toilet according to claim 6, wherein the flush toilet is inclined upward.

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