JP2019137994A - Flush toilet bowl - Google Patents

Abstract

To provide a flush toilet bowl capable of achieving both suppression of bubble mixing in rim discharge water and improvement of water force.SOLUTION: A flush toilet bowl 1 of the present invention has a bowl body 2 and a washing water tank device 16 having a tank supplying part 16b. The bowl body comprises a bowl 10, a rear side water channel 4, water discharge parts 20, 22 provided to only a rim and discharging washing water in the bowl to form a swirl flow, and rim water channels 6, 8 leading washing water in the rear side water channel to the water discharge parts. The rear side water channel comprises an inlet 4a connected with the tank supplying part, a straightening part 30 disposed below the inlet and straightening washing water supplied from the tank supplying part via the inlet, and a tilted part 32 formed on a downstream side of the straightening part and tilted downward to communicate with the rim water channels. The straightening part is set with a channel cross section A2 thereof to be smaller than a channel cross section A3 of the tilted part, and is formed with the channel to be roughly horizontal.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a flush toilet, and more particularly, to a flush toilet that is washed with wash water supplied from a wash water source and discharges filth.

Conventionally, as a conventional flush toilet that is washed with wash water supplied from a wash water source and discharges filth, for example, as described in Patent Document 1, wash water in a wash water tank is supplied to a toilet body. A so-called tank flush toilet is known in which flush water is discharged from only two rim spouts provided on the rim of the toilet body downstream of the water conduit after being supplied to the water conduit.
In such a conventional flush toilet, unlike a flush toilet that pushes filth in the bowl by a jet spout discharged from a jet spout other than the rim spout, by a rim spout discharged only from the rim spout Since it is necessary to clean the bowl surface and push in the filth, one of the issues is how to increase the rim water discharge.
Also, in recent tank-type flush toilets, from the viewpoint of saving water and improving design, the so-called low silhouette type wash water, in which the upper end position of the wash water tank is set to a relatively low position. Tanks tend to be preferred. For this reason, the so-called low tank has been adopted in the wash water tank, in which the maximum water level inside the wash water tank is set relatively low, and the water head pressure (head pressure) acting on the bottom surface of the wash water tank is lowered.

JP2015-190245A

However, in the low tank type washing water tank described above, the maximum water level is set low and the head pressure acting on the bottom surface of the washing water tank is set low, so that the toilet body is guided from the washing water tank. There is a problem in that the washing water supplied to the water channel is weakened.
Accordingly, since the water power of the rim water spouting is weakened, there is a demand for how to increase and maintain the water power of the rim water spouting even when a low tank is applied as the washing water tank.
In addition, in order to increase the water flow of the rim water discharge, it is conceivable to secure the water flow by supplying a large amount of wash water from the wash water tank. It is necessary to increase the space (volume).
However, when the internal space of the water conduit is set to be large in this way, particularly when the cleaning water flows into the water conduit from the cleaning water tank, it mixes with the air in the water conduit and bubbles are generated. There is a problem of fear.
In addition, when cleaning water containing bubbles in the water conduit is discharged from the rim spout to the bowl surface, the cleaning water is scattered on the bowl surface and scattered outside the bowl surface. There is a problem of fear.
In particular, when cleaning water containing bubbles flows near the front end of the bowl surface where the radius of curvature of the bowl surface is relatively small, the flow of cleaning water is greatly forced to change direction from the front to the back, There is a problem that scattering outside the bowl surface becomes significant.
Further, there is a problem that abnormal noise may occur when bubbles are mixed in the cleaning water.

  Accordingly, the present invention has been made to solve the above-described problems of the prior art and the requested problems, and is a large flush that can realize both suppression of bubble mixing in rim water spouting and improvement of water flow. The purpose is to provide a toilet.

In order to solve the above-described problems, the present invention is a flush toilet that is washed with washing water supplied from a washing water source and discharges filth, and includes a toilet body and a rear upper surface of the toilet body as the washing water source. A washing water tank for storing washing water, comprising a tank supply unit that forms a flow path including a drain outlet on a bottom surface thereof, and supplying the washing water from the tank supply unit to the toilet body A flush water tank, and the toilet body is formed at the rear of the bowl, the bowl having a bowl-shaped filth receiving surface and a rim formed on the upper edge of the filth receiving surface, A rear-side water guide channel that guides the cleaning water supplied from the tank supply unit to the rear of the bowl; a water discharge unit that is provided only in the rim and discharges the cleaning water into the bowl to form a swirling flow; and Downstream of the rear water conduit A rim conduit that is formed and guides wash water in the rear conduit to the water discharge portion, and a drain passage that is connected to the bottom of the bowl to discharge filth, and the rear conduit is An inlet part to which the tank supply part is connected; a rectifying part provided below the inlet part for rectifying the wash water supplied from the tank supply part through the inlet part; and downstream of the rectifying part An inclined portion that is formed on a side and is inclined downward so as to communicate with the rim conduit, and the rectifying portion has a flow passage cross-sectional area that is smaller than a flow passage cross-sectional area of the inclined portion. It is set and the flow path is formed so that it may become substantially horizontal.
In the present invention configured as described above, the wash water supplied from the tank supply unit to the inlet portion of the rear side conduit of the toilet body flows into the rectifier unit of the rear conduit. At this time, the flow straightening portion is set so that the flow passage cross-sectional area is smaller than the flow passage cross-sectional area of the inclined portion, and the flow passage is formed so as to be substantially horizontal. The washing water that has flowed into the rectification unit from the supply unit through the inlet of the rear side water conduit of the toilet body will spread all over the rectification unit.
As a result, since the entire volume space in the rectifying section of the rear water conduit of the toilet body is occupied by the cleaning water, the cleaning water in the cleaning water tank flows out from the drain outlet of the tank supply section and is guided to the rear side of the toilet body. When supplied into the water channel, it is possible to suppress the generation of bubbles in the rectifying unit of the rear water conduit.
Furthermore, since an inclined portion that is inclined downward toward the rim conduit is formed on the downstream side of the rectifier of the rear water conduit of the toilet body, the wash water that has flowed into the inclined portion from the rectifier is When flowing through the inclined portion, the flow rate of the washing water can be increased.
Therefore, for example, even when a so-called low tank is applied as a wash water tank, the highest water level inside the tank is relatively low and the water head pressure acting on the bottom surface of the wash water tank is low. In the rear side water conduit, the mixing of bubbles can be suppressed, and the washing water (rim water spouting) discharged from the water discharge section from the rear side water conduit through the rim water conduit can be maintained.
As a result, it is possible to realize both suppression of bubble mixing in the rim water spouting and improvement of the water force.

In this invention, Preferably, the flow-path cross-sectional area of the rectification | straightening part of the said back side water conduit is set so that it may become smaller than the flow-path cross-sectional area of the said tank supply part.
In the present invention configured as described above, the flow passage cross-sectional area of the rectifying section of the rear side water conduit is set to be smaller than the flow passage cross-sectional area of the tank supply section. The washing water that has flowed into the rectifying part of the rear side water conduit can be filled quickly.
Therefore, since mixing of bubbles can be suppressed in the rectification part of the rear side water conduit of the toilet body, the rectification effect can be improved.

In this invention, Preferably, from the bottom face in the said rectification | straightening part on the same vertical direction straight line with respect to the distance (H1) on the perpendicular | vertical straight line from the lowest position of the bottom face of the inclination part of the said rear side water conduit to the upper surface of the said rectification | straightening part The ratio (H2 / H1) of the distance (H2) to the upper surface is from the bottom surface of the inclined portion on the same vertical straight line to the distance (H3) on the vertical straight line from the lowest position of the bottom surface to the upper surface of the inclined portion. It is set to be smaller than the ratio (H4 / H3) of the vertical distance (H4) to the upper surface.
In the present invention configured as described above, since the height dimension in the flow path of the rectification part of the rear side conduit of the toilet body can be set smaller than the height dimension in the flow path of the inclined part, While setting the channel cross-sectional area in the rectifying unit to be relatively small, the channel cross-sectional area in the inclined portion can be set to be relatively large.
Further, since the upstream portion of the rectifying unit can be set at a position higher than the inclined portion, the washing water in which the potential energy is suppressed and the positional energy is kept relatively high in the rectifying unit. As a result of flowing through the inclined portion, water is applied.
Therefore, in the rectification part and the inclined part of the rear side water conduit of the toilet main body, it is possible to achieve both suppression of mixing of bubbles and provision of water.

In the present invention, preferably, the inclined portion of the rear side water conduit is inclined downward from the inlet connected to the rectifying portion toward the outlet connected to the rim conduit, and the bottom surface of the inclined portion The inclination angle at which the upper surface of the inclined portion is inclined downward with respect to the horizontal plane is set to be larger than the inclination angle at which the upper surface of the inclined portion is inclined downward with respect to the horizontal plane.
In the present invention configured as described above, by increasing the inclination angle of the bottom surface of the inclined portion of the rear-side water conduit compared to the inclination angle of the upper surface of the inclined portion, the flow path cross-sectional area of the inclined portion is reduced toward the downstream side. Can be set large.
Therefore, since the pressure loss in the flow path of the inclined portion of the rear side water conduit can be suppressed, a sufficient water force can be imparted to the wash water flowing in the inclined portion.

In the present invention, preferably, the water discharge portion is disposed on the rim in the front region relative to the center in the front-rear direction of the bowl and discharges water forward, and the rectifying portion and the inclined portion of the rear side water conduit are flat. In view, they are linearly provided in the front-rear direction.
In a general flush toilet different from the present invention configured as described above, when the water discharger is disposed on the rim located in the front region from the center in the front-rear direction of the bowl, the water discharger forwards from the water discharger. The washed water spouted flows into the vicinity of the front end in the bowl with a strong water force, passes through the front end in the bowl, and is rapidly folded back.
At this time, in particular, the closer the position of the water discharger is to the front end side of the bowl, the longer the path from the tank supply part to the water discharger through the rear side waterway and the rim waterway, and bubbles are generated in this path. In this case, the cleaning water containing bubbles is discharged from the water discharger and reaches the vicinity of the front end in the bowl.
Furthermore, in general, the longer the path from the tank supply section to the water discharge section through the rear side conduit and the rim conduit, the pressure loss in the passage increases, resulting in a decrease in water flow and supply of cleaning water. This will cause delay (or wasted water).
On the other hand, in the present invention, since the rectifying portion and the inclined portion of the rear side water conduit are linearly provided in the front-rear direction in plan view, at least the flow path distance of the section of the rear side water conduit is minimized. Can be set.
Therefore, even when the water discharger is disposed on the rim in the front region from the center in the front-rear direction of the bowl, the path from the tank supply unit to the water discharger via the rear water supply channel and the rim water transfer channel is set to be relatively short. Therefore, it is possible to suppress the mixing of bubbles and the decrease in water force in this path. In addition, a delay in supply of cleaning water (or waste water) can be suppressed.

In the present invention, preferably, the rim conduit has a channel cross-sectional area at an inlet portion thereof set to be smaller than a channel cross-sectional area of the water discharge portion, and the bottom surface of the rim conduit has the rim guide channel It forms so that it may incline below toward the said water discharging part from the entrance part of a water channel.
In the present invention configured as described above, since the channel cross-sectional area of the inlet portion of the rim conduit is set to be smaller than the channel cross-sectional area of the water discharge portion, from the inclined portion of the rear side conduit The wash water flowing into the rim conduit is rectified by passing through the inlet portion of the rim conduit having a channel cross-sectional area smaller than the channel cross-sectional area of the water discharge portion. The washing water in the rim water channel flows along the bottom surface of the rim water channel that is inclined downward from the inlet portion of the rim water channel toward the water discharge unit, so that water is applied and the flow velocity is increased.
Therefore, even in the wash water in the rim conduit on the downstream side of the rear conduit, it is possible to impart a water force while suppressing the mixing of bubbles.

In the present invention, preferably, the water discharger is disposed on the rim on one side and the front side in the left-right direction with respect to the center in the front-rear direction and the left-right direction of the bowl, and is flushed toward the front of the bowl. A first rim water discharge portion that forms a swirling flow by discharging water and a first rim that is disposed on the rim on the other side in the left-right direction and the rear side with respect to the center in the front-rear direction and the left-right direction of the bowl portion A second rim water discharge portion that forms a swirl flow in the same direction as the swirl flow from the water discharge portion, and the rim water conduit passes the wash water in the rear side water conduit with the first rim water discharge portion and the first rim water discharge portion. A first rim water guide channel and a second rim water guide channel led to each of the two rim water discharge units, and the flow path cross-sectional area of the rectifying unit is equal to the flow channel cross-sectional area of the first rim water discharge unit and the second rim water discharge Smaller than the total of the cross-sectional area of the channel It is set to.
In the present invention configured as described above, the flow passage cross-sectional area of the rectifying portion of the rear side water conduit of the toilet body includes the flow passage cross-sectional area of the first rim water discharge portion and the flow passage cross-sectional area of the second rim water discharge portion. Therefore, the wash water supplied from the tank supply unit into the rear side conduit is sufficiently rectified in the rectification unit, and after the water is applied in the inclined unit, The water is supplied to each of the first rim water discharge portion and the second rim water discharge portion through the first rim water supply passage and the second rim water supply passage.
Accordingly, it is possible to discharge water from each of the first rim water discharge section and the second rim water discharge section in a state where mixing of bubbles is suppressed and water is applied.

  According to the flush toilet of the present invention, it is possible to realize both suppression of bubble mixing in the rim water discharge and improvement of the water flow.

It is a schematic plan view of the flush toilet according to one embodiment of the present invention. It is sectional drawing along the II-II line of FIG. It is sectional drawing along the III-III line of FIG. In the flush toilet according to the embodiment of the present invention shown in FIG. 2, it is a partially enlarged view in which a portion of the rear side water conduit of the toilet body is enlarged. FIG. 3 is a partially enlarged view of the flush toilet according to the embodiment of the present invention shown in FIG. 2 in which a portion of the inner peripheral surface of the rim of the toilet body is enlarged. It is a figure which shows each flow-path cross section AH in the flush toilet according to one Embodiment of this invention shown in FIG.

Next, a flush toilet according to an embodiment of the present invention will be described with reference to FIGS.
First, FIG. 1 is a schematic plan view of a flush toilet according to an embodiment of the present invention. 2 is a cross-sectional view taken along line II-II in FIG. 1, and FIG. 3 is a cross-sectional view taken along line III-III in FIG.
As shown in FIGS. 1-3, the flush toilet 1 by one Embodiment of this invention is equipped with the toilet bowl main body 2 made from earthenware. The toilet body 2 includes a rear side conduit 4 (details will be described later), a first rim conduit 6, a second rim conduit 8, a bowl 10, and a drain trap conduit from the upstream side toward the downstream side. 12 respectively.
The toilet body 2 may be made of resin other than ceramics.

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 it is the same as the structure of the toilet bowl, the 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), the sanitary washing part (not shown) for washing the user's local part is connected to the toilet body 2. Functional parts (not shown) such as a water supply system functional part related to the water supply function of the water may be provided, but since these are also similar to the structure of a conventional flush toilet, a specific description will be given. Is omitted.

Next, as shown in FIGS. 1 to 3, the flush toilet 1 according to an embodiment of the present invention includes a flush water tank device 14 that is a flush water source provided at the rear and above the bowl 10 of the toilet body 2. I have.
This washing water tank device 14 is a washing water tank for storing washing water, and makes it possible to supply the stored washing water to the rear water conduit 4 of the toilet body 2 using gravity, so-called gravity water supply type water storage. A tank 16 is provided. On the bottom surface of the water storage tank 16, a drain port 16a is formed as a tank supply unit for supplying cleaning water, and a tank supply path 16b directed downward from the drain port 16a is formed. .
The water storage tank 16 typically has a water supply device (not shown) for supplying cleaning water to the water storage tank 16 and a drain valve device (not shown) for opening and closing the drain port 16a of the water storage tank 16. However, since these devices are the same as those in the prior art, a detailed description thereof will be omitted.
In the present embodiment, for example, a so-called low tank is adopted as the water storage tank 16, in which the highest water level in the water storage tank 16 is relatively low and the water head pressure (head pressure) acting on the bottom surface of the water storage tank 16 is low. At the time of toilet flushing, for example, a wash water amount of about 3.6 [L] to about 4.8 [L] can be supplied from the water storage tank 16 to the toilet body 2.

Next, in the flush toilet 1 according to the embodiment of the present invention shown in FIG. 1, in the plan view of the bowl 10 of the toilet body 2, the center extending horizontally and horizontally so as to bisect the bowl 10 in the front-rear direction. The axis is indicated by “X”, and the central axis extending in the horizontal front-rear direction so as to bisect the bowl 10 in the left-right direction is indicated by “Y”.
In FIG. 1, the intersection of the center axes X and Y is the center O of the bowl 10 in plan view, and the center axis extending in the vertical direction passing through the center O is indicated by “Z”.
Accordingly, in the flush toilet 1 according to the embodiment of the present invention shown in FIG. 2 and FIG. 3, in the side view of the bowl 10 of the toilet body 2, the bowl 10 is vertically divided so as to be bisected in the front-rear direction. The extending central axis is indicated by “Z”.
Furthermore, 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.
And as shown in FIGS. 1-3, with respect to the center O in the bowl 10 of the flush toilet 1, the center axis X extending in the horizontal horizontal direction, and the center axis Z extending in the vertical direction, the front side and the rear side These regions are defined as “front region F” and “rear region B”, respectively.
Furthermore, as shown in FIG. 1, the “left side region L” for each of the left and right regions as viewed from the front with respect to the center O in the bowl 10 of the flush toilet 1 and the central axis Y extending in the horizontal front-rear direction. , “Right-side region R”.

First, as shown in FIGS. 1 to 3, the rear side conduit 4 located on the upstream side of the toilet body 2 will be described in detail later, but from the entrance 4 a provided on the rear side of the upper surface of the toilet body 2, the front side. It extends to the vicinity of the back side of the bowl 10 and is formed on the rear side of the bowl 10.
Further, an outlet (downstream end) at the lower end of the tank supply passage 16 b of the water storage tank 16 is connected to the inlet 4 a of the rear side water guide passage 4.

Next, as shown in FIG. 1 and FIG. 2, the first rim conduit 6 is connected to one side of the bowl 10 (FIG. 1) from the outlet (downstream end) at the front end of the rear conduit 4 near the back side of the bowl 10. 1, the left side of the bowl 10 as viewed from the front side of the bowl 10, and the inside of the rim 18 formed on the upper edge of one side of the bowl 10 (left side as viewed from the front side of the bowl 10 shown in FIG. 1). It extends forward so as to bypass the outer peripheral surface.
Further, as shown in FIG. 1, the front end (downstream end) of the first rim water conduit 6 is a first rim provided as a first rim water discharge portion on the rim 18 in the front region F and the left region L of the bowl 10. It is a spout 20.
Here, as shown in FIG. 1, the curvature radius in plan view of the bowl surface S in the front side region F of the bowl 10 in which the first rim spout 20 is disposed is minimum in the vicinity of the front end 10 a in the bowl 10 ( The curvature is the maximum).
Further, as shown in FIG. 1, the position in the front-rear direction of the first rim spout 20 of the toilet body 2 is the inner peripheral surface 18 a of the rim 18 of the bowl 10 in the plan view of FIG. 1 and the side view of FIG. 2. It is located in the front side region F and the left side region L of the bowl 10 in the rear side of the front end 18b and in front of the front end 24a of the front side wall surface of the recess 24.
For example, a distance Y1 in the front-rear direction from the front end 10a in the bowl 10 (the front end 18b of the inner peripheral surface 18a of the rim 18) to the first rim spout 20 and a distance Y2 from the front end 10a to the rear end 10b in the bowl 10 The ratio (Y1 / Y2) is set to 15% to 35% (Y1 / Y2 = 15% to 35%).
Note that the first rim spout 20 may be provided as a first rim spout on the rim 18 in the front region F and the right region R of the bowl 10.

Further, as shown in FIGS. 1 and 3, the second rim conduit 8 is formed from the outlet (downstream end) at the front end of the rear conduit 4 near the back side of the bowl 10 to the other side of the bowl 10 (see FIG. 1). The outer periphery of the bowl 10 is branched inside the rim 18 formed on the upper edge of the other side of the bowl 10 (right side when viewed from the front of the bowl 10 shown in FIG. 1) after branching to the right side as viewed from the front of the bowl 10 shown. It extends forward so as to bypass the surface.
Thereafter, as shown in FIG. 1, the second rim conduit 8 is formed so as to make a U-turn rearward near the right side of the bowl 10. The rear end, which is the downstream end of the second rim conduit 8, is provided as a second rim water discharge portion on the rim 18 in the rear region B and the right region R of the bowl 10 as shown in FIG. 1. It is a 2 rim spout 22.
That is, the position of the second rim spout 22 of the toilet body 2 in the front-rear direction is rearward of the central axis X in the horizontal direction of the bowl 10 in the plan view of FIG. 1 and the side view of FIG. It is located in the rear region B and the right region R of the bowl 10 in front of the rear end 24b of the rear side wall surface.

Next, as shown in FIGS. 1 to 3, the bowl 10 of the toilet body 2 includes a recess 24, a filth receiving surface 26, a shelf 28, and a rim 18 from the bottom to the top.
First, the concave portion 24 of the bowl 10 is formed in a concave shape below the bowl 10 so as to be a reservoir portion in which the reservoir water W0 is accommodated.
Next, the filth receiving surface 26 of the bowl 10 is formed in a bowl shape from the upper edge of the recess 24 and serves as a surface for receiving filth.
Further, the shelf 28 of the bowl 10 is formed between the outer edge of the dirt receiving surface 26 and the lower end of the rim 18. Wash water in the rear side water conduit 4 of the toilet body 2 passes through the first rim water conduit 6 and the second rim water conduit 8 on the downstream side to the first rim water outlet 20 and the second rim water outlet 22, respectively. It has come to be guided.
The wash water discharged from each of the first rim water discharge port 20 and the second rim water discharge port 22 is guided to the downstream side in the circumferential direction along the shelf 28 so as to form a swirl flow in the same direction. It has become.
In the flush toilet 1 of the present embodiment, the first rim spout 20 provided only on the rim 18 is not provided with a water discharge portion (for example, a jet spout) at locations other than the rim 18. In addition, a mode in which only rim water discharge is performed from the two water discharge portions of the second rim water discharge port 22 will be described, but the second rim water discharge port 22 may be omitted.

Next, as shown in FIGS. 1 to 3, the drain trap pipe 12 located on the downstream side of the toilet body 2 is formed from the lower side of the concave portion 24 of the bowl 10 to discharge the filth in the bowl 10. It is a drainage channel.
Further, the flush toilet 1 of the present embodiment is a so-called “wash-out flush toilet” in which filth is pushed to the drain trap pipe 12 by the flowing water action caused by the water drop in the bowl 10 of the toilet body 2. .
However, in the flush toilet 1 of the present embodiment, a so-called “siphon flush toilet” or the like that sucks filth in the bowl using the siphon action and discharges it to the outside at once from the drain trap pipe. The present invention is also applicable to flush toilets other than drop-type flush toilets.

Next, referring to FIGS. 1 to 6, the rear side water conduit 4 in the toilet body 2 of the flush toilet 1 of the present embodiment and the first rim water outlet of the first rim water conduit 6 on the downstream side thereof. Details of up to 20 channels will be described.
First, FIG. 4 is the elements on larger scale which expanded the part of the rear side water conduit of the toilet bowl main body in the flush toilet according to one Embodiment of this invention shown in FIG. FIG. 5 is a partially enlarged view of the flush toilet according to the embodiment of the present invention shown in FIG. 2 in which the portion of the inner peripheral surface of the rim of the toilet body is enlarged. Furthermore, FIG. 6 is a figure which shows each flow-path cross section AH in the flush toilet according to one Embodiment of this invention shown in FIG.
Here, in FIGS. 4 and 6, each channel cross-sectional area [mm ² ] of the channel from the upstream tank supply channel 16b to the downstream rim water spouting ports 20 and 22 of the rear water guide channel 4 is A1. -A9.

As shown in FIG. 4, the rear-side water conduit 4 includes an inlet 4 a, a rectifying unit 30, and an inclined unit 32 from the upstream side toward the downstream side.
First, as shown in FIG.1 and FIG.4, the inlet 4a of the rear side water conduit 4 is opened upward in the position of the rear side of the upper surface of the toilet body 2, and this inlet 4a has a water storage tank. The outlet (downstream end) at the lower end of the 16 tank supply passages 16b is watertightly connected from above via a seal member (not shown) or the like.
Next, as shown in FIG.1 and FIG.4, the rectification | straightening part 30 of the back side water conduit 4 is formed so that it may extend substantially horizontally toward the front, after being formed under the back side water conduit 4. Yes. The wash water supplied from the tank supply path 16b through the inlet 4a of the rear side water guide path 4 flows into the rectification unit 30 and then flows forward in the rectification unit 30 so as to be rectified. It has become.
Moreover, as shown in FIG.1 and FIG.4, the inclination part 32 of the back side water conduit 4 is formed in the downstream (front side and the downward side of the rectification part 30) of the rectification part 30. As shown in FIG. The inclined portion 32 is inclined downward from the rear toward the front so that the front end thereof communicates with the inlet 6 a of the first rim conduit 6.

  Next, as shown in FIGS. 4 and 6, the flow path cross-sectional areas A1 and A2 of the rectification unit 30 of the tank supply path 16b and the rear side water conduit 4 are as follows. The channel cross-sectional area A2 is set to be smaller than the channel cross-sectional area A1 of the tank supply path 16b.

Next, as shown in FIG. 4, the distance in the vertical direction straight line from the lowest height position P <b> 0 of the bottom surface 32 a of the inclined portion 32 to the height position P <b> 1 of the upper surface 30 a of the rectifying unit 30 in the rear-side water conduit 4. Is H1 [mm], and the distance from the height position P2 of the bottom surface 30b to the position P1 of the top surface 30a in the rectifying unit 30 on the same vertical straight line is H2 [mm].
As shown in FIGS. 4 and 6, the distance on the vertical straight line from the lowest height position P0 of the bottom surface 32a to the height position P3 of the upper surface 32b in the inclined portion 32 is H3 [mm], and the inclined portion 32 The vertical distance from the height position P4 of the bottom surface 32a to the height position P3 of the top surface 32b is H4 [mm].
As a result, as shown in FIG. 4, in the flow path in the rectifying unit 30 and the inclined unit 32 of the rear water guide channel 4, the ratio of the distance H2 to the distance H1 (H2 / H1) is the distance H4 to the distance H3. It is set to be smaller than the ratio (H4 / H3) ((H2 / H1) <(H4 / H3)).
Therefore, as shown in FIG. 4, the height dimension H2 in the flow path upstream of the outlet (inlet of the inclined part 32) in the rectifying part 30 of the rear side water conduit 4 is the inlet (rectifying part) in the inclined part 32. 30 outlet) is set smaller than the height dimension H4 in the flow path on the downstream side (H2 <H4).

Further, as shown in FIGS. 1 and 6, the flow paths of the rectifying unit 30 and the inclined unit 32 of the rear side water guide channel 4 are linearly provided in the front-rear direction in plan view, and the rear side guide is provided. The maximum width dimension in the left-right direction of each of the rectifying unit 30 and the inclined part 32 of the water channel 4 is set to the same width dimension W1.
Therefore, as shown in FIGS. 4 and 6, the flow path cross-sectional area A2 of the rectifying unit 30 formed by the width dimension W1 and the height dimension H2 in the flow path of the rectifying unit 30 of these rear-side water conduits 4. Is set to be smaller than the channel cross-sectional area A3 of the inclined portion 32 formed by the width dimension W1 and the height dimension H4 in the channel of the inclined portion 32 (A2 <A3).

Next, as shown in FIG. 4, the inclined portion 32 of the rear side water conduit 4 is directed from the rear inlet 32 c connected to the rectifier 30 to the outlet 32 d connected to the inlet 6 a of the first rim conduit 6. And tilted downward.
The inclination angle α at which the bottom surface 32a of the inclined portion 32 is inclined downward with respect to the horizontal plane is set to be larger than the inclination angle β at which the upper surface 32b of the inclined portion 32 is inclined downward with respect to the horizontal plane. (Α> β).
Thereby, about the flow-path cross-sectional area A3 of the inclination part 32, it sets so that it may become large downstream.

Next, as shown in FIGS. 1 and 4 to 6, the flow passage cross-sectional area A4 (see FIGS. 4 and 6) in the vicinity of the inlet 6 a of the first rim conduit 6 (cross section C in FIG. 1) is It is set to be smaller than the channel cross-sectional area A8 (see FIG. 6) of the 1 rim water spouting port 20.
As shown in FIGS. 1, 5, and 6, the bottom surface 6 b of the first rim conduit 6 formed on the outer side of the inner peripheral surface 18 a of the rim 18 extends from the inlet 6 a of the first rim conduit 6. It is formed so as to incline downward toward the one rim water spouting port 20.
Furthermore, as shown in FIG. 6, the flow passage cross-sectional areas A4 to A8 from the inlet 6a to the first rim water discharge port 20 in the first rim conduit 6 are set so as to increase toward the downstream side (A4). <A5 <A6 <A7 <A8).
On the other hand, the second rim conduit 8 also has the bottom surface 8b of the second rim conduit 8 from the inlet 8a of the second rim conduit 8 to the second as shown in FIG. It is formed so as to incline downward toward the rim water spouting port 22 toward the downstream side. In addition, the cross-sectional area of the flow path from the inlet 8a to the second rim water discharge port 22 in the second rim conduit 8 is also set so as to increase toward the downstream side.

  Next, as shown in FIG. 6, the flow path cross-sectional area A <b> 2 of the rectifying unit 30 of the rear side water conduit 4 is the flow path cross-sectional area A <b> 8 of the first rim water discharge port 20 and the flow path breakage between the second rim water discharge port 22. It is set to be smaller than the sum (A8 + A9) with the area A9 (A2 <A8 + A9).

Below, with reference to FIGS. 1-6, the effect | action of the flush toilet 1 by one Embodiment of this invention is demonstrated.
According to the flush toilet 1 according to the above-described embodiment of the present invention, as shown in FIGS. 1 and 4, the flush water supplied from the tank supply path 16b to the inlet 4a of the rear water conduit 4 of the toilet body 2 is provided. W flows into the rectifying unit 30 of the rear water conduit 4.
At this time, as shown in FIG. 4, the rectifying unit 30 is set such that the flow path cross-sectional area A2 is smaller than the flow path cross-sectional area A3 of the inclined part 32 (A2 <A3), and the rectification is performed. The flow path in the portion 30 is formed to be substantially horizontal. For this reason, the wash water that has flowed into the rectifying unit 30 from the tank supply path 16b through the inlet 4a of the rear water conduit 4 of the toilet body 2 spreads all over the rectifying unit 30 at once.
Thereby, since the whole volume space in the rectification | straightening part 30 of the back side water conduit 4 of the toilet bowl body 2 is occupied by wash water, the wash water in the water storage tank 16 flows out from the drain port 16a, and from the tank supply path 16b. When supplied into the rear side water conduit 4 of the toilet body 2, it is possible to suppress the generation of bubbles in the rectifying unit 30 of the rear side water conduit 4.
Furthermore, since the inclined part 32 which inclines below toward the 1st rim water conduit 6 is formed in the downstream of the rectifier 30 of the back side water conduit 4 of the toilet body 2, The washing water that has flowed into the inclined portion 32 can increase the flow rate of the washing water when flowing through the inclined portion 32.
Therefore, for example, as the water storage tank 16 of the cleaning water tank device 14, a so-called low tank is applied, in which the highest water level inside is relatively low and the water head pressure (head pressure) acting on the bottom surface of the cleaning water tank is low. Even if it exists, while being able to suppress mixing of air bubbles in the rear side water conduit 4 of the toilet body 2, the first rim water channel 6 and the second rim water channel 8 are passed through the first rim water channel 6 from the rear side water channel 4. It is possible to maintain the water flow of the cleaning water (rim water discharge) discharged from each of the rim water discharge port 20 and the second rim water discharge port 22.
As a result, it is possible to achieve coexistence of suppression of air bubbles in the rim water spouting of each of the first rim water spouting port 20 and the second rim water spouting port 22 and improvement of the water flow.

Next, according to the flush toilet 1 according to the present embodiment, as shown in FIGS. 4 and 6, the channel cross-sectional area A2 of the rectifying unit 30 of the rear side water conduit 4 of the toilet body 2 is the tank supply channel 16b. It is set to be smaller than the channel cross-sectional area A1. Thereby, the wash water W which flowed into the rectification | straightening part 30 of the back side water conduit 4 of the toilet bowl body 2 from the water storage tank 16 can be filled with water early.
Therefore, in the rectification part 30 of the back side water conduit 4 of the toilet main body 2, since mixing of a bubble can be suppressed, a rectification effect can be improved.

Moreover, according to the flush toilet 1 by this embodiment, as shown in FIG. 4, in the flow path in the rectification | straightening part 30 and the inclination part 32 of the back side water conduit 4, the minimum height of the bottom face 32a of the inclination part 32 is provided. From the position P0 to the position P1 of the upper surface 30a from the height position P2 of the bottom surface 30b of the rectifying unit 30 on the same vertical direction straight line to the distance H1 on the vertical straight line from the position P0 to the height position P1 of the upper surface 30a of the rectifying unit 30. The ratio of the distance H2 (H2 / H1) of the bottom surface 32a of the inclined portion 32 to the distance H3 on the straight line from the lowest height position P0 of the bottom surface 32a to the height position P3 of the upper surface 32b of the inclined portion 32 is It is set to be smaller than the ratio (H4 / H3) of the vertical distance H4 from the height position P4 to the height position P3 of the upper surface 32b ((H2 / H1) <(H4 / H3)).
Therefore, as shown in FIG. 4, the height dimension H2 in the flow path of the rectifying unit 30 of the rear water conduit 4 of the toilet body 2 is set to be smaller than the height dimension H4 in the flow path of the inclined portion 32. Therefore, the flow passage cross-sectional area A3 in the inclined portion 32 can be set relatively large while the flow passage cross-sectional area A2 in the rectifying unit 30 is set relatively small.
Also, as shown in FIG. 4, the upstream portion of the rectifying unit 30 on the upstream side can be set at a position higher than the inclined portion 32, so that bubbles are prevented from being mixed in the rectifying unit 30. The washing water having a relatively high potential energy flows through the inclined portion 32, whereby water is applied.
Therefore, in the rectification | straightening part 30 and the inclination part 32 of the back side water conduit 4 of the toilet bowl main body 2, coexistence of mixing of a bubble and water supply is realizable.

Furthermore, according to the flush toilet 1 of the present embodiment, as shown in FIG. 4, the inclination angle α of the bottom surface 32 a of the inclined portion 32 of the rear water conduit 4 of the toilet body 2 is set to the inclination of the upper surface 32 b of the inclined portion 32. By making it larger than the angle β, the flow path cross-sectional area A3 of the inclined portion 32 can be set larger toward the downstream side.
Therefore, since the pressure loss in the flow path of the inclined portion 32 of the rear side water conduit 4 can be suppressed, a sufficient water force can be imparted to the wash water flowing in the inclined portion 32.

Further, in a general flush toilet other than the flush toilet 1 according to the present embodiment, when the water discharge portion of the toilet body is disposed on the rim located in the front region from the center in the front-rear direction of the bowl, The wash water spouted forward from the water discharge part flows into the vicinity of the front end in the bowl with a strong water force, then passes through the front end in the bowl and is rapidly folded back.
At this time, in particular, the closer the position of the water discharger is to the front end side of the bowl, the longer the path from the tank supply path 16b to the water discharger through the rear side waterway and the rim waterway, and bubbles are generated in this path. In this case, the cleaning water containing bubbles is discharged from the water discharger and reaches near the front end in the bowl.
Furthermore, in a general flush toilet other than the flush toilet 1 according to the present embodiment, the longer the path from the tank supply path 16b to the water discharge section through the rear side waterway and the rim waterway, Pressure loss increases, which causes a decrease in water flow and a delay in supply of cleaning water (or wasted water).
On the other hand, in the flush toilet 1 according to the present embodiment, as shown in FIG. 1, the rectifying portion 30 and the inclined portion 32 of the rear water conduit 4 of the toilet body 2 are linearly arranged in the front-rear direction in plan view. Since it is provided, the flow path distance in the front-rear direction of at least the section of the rear-side water conduit 4 can be set to the shortest.
Therefore, even if the first rim water discharge port 20 is disposed on the rim 18 in the front region F from the center O in the front-rear direction of the bowl 10, the rear side water conduit 4 and the first rim water conduit 6 from the tank supply passage 16 b. Since the route to the first rim water spouting port 20 can be set to be relatively short, it is possible to suppress the mixing of bubbles and the decrease in water force in this route. In addition, a delay in supply of cleaning water (or waste water) can be suppressed.
be able to.

Furthermore, according to the flush toilet 1 according to the present embodiment, as shown in FIGS. 1 and 4 to 6, the channel cross-sectional area A4 of the inlet 6 a of the first rim conduit 6 is the first rim spout 20. It is set to be smaller than the channel cross-sectional area A8.
As shown in FIGS. 1, 5, and 6, the bottom surface 6 b of the first rim conduit 6 formed on the outer side of the inner peripheral surface 18 a of the rim 18 extends from the inlet 6 a of the first rim conduit 6. It is formed so as to incline downward toward the one rim water spouting port 20.
Furthermore, as shown in FIG. 6, the flow passage cross-sectional areas A4 to A8 from the inlet 6a to the first rim water discharge port 20 in the first rim conduit 6 are set so as to increase toward the downstream side (A4). <A5 <A6 <A7 <A8).
As a result, the wash water flowing into the first rim conduit 6 from the inclined portion 32 of the rear-side conduit 4 has a first rim having a channel cross-sectional area A4 that is smaller than the channel cross-sectional area A8 of the first rim spout 20. Rectification is achieved by passing through the inlet 6 a of the water conduit 6. The washing water in the first rim conduit 6 flows along the bottom surface of the rim conduit that is inclined downward from the inlet 6a of the first rim conduit 6 toward the first rim outlet 20, thereby Is added to increase the flow velocity.
Therefore, even in the wash water in the first rim water guide channel 6 on the downstream side of the rear side water guide channel 4, it is possible to impart a water force while suppressing the mixing of bubbles.
Similarly, with respect to the second rim conduit 8, as shown in FIG. 3, the bottom surface 8 b of the second rim conduit 8 is downstream from the inlet 8 a of the second rim conduit 8 toward the second rim outlet 22. It is formed so as to incline downward. In addition, the cross-sectional area of the flow path from the inlet 8a to the second rim water discharge port 22 in the second rim conduit 8 is also set so as to increase toward the downstream side.
Accordingly, even in the wash water in the second rim conduit 8 on the downstream side of the rear-side conduit 4, it is possible to impart a water force while suppressing the mixing of bubbles.

Moreover, according to the flush toilet 1 according to the present embodiment, as shown in FIG. 6, the flow passage cross-sectional area A2 of the rectifying unit 30 of the rear water conduit 4 of the toilet body 2 is the flow of the first rim spout 20. It is set to be smaller than the sum (A8 + A9) of the road cross-sectional area A8 and the flow passage cross-sectional area A9 of the second rim water spouting port 22 (A2 <A8 + A9).
As a result, as shown in FIG. 4, the wash water W supplied from the tank supply path 16 b into the rear water guide path 4 is sufficiently rectified in the rectification unit 30, and a water force is given in the inclined part 32. Thereafter, the water is supplied to the first rim water outlet 20 and the second rim water outlet 22 through the first rim water conduit 6 and the second rim water conduit 8, respectively.
Therefore, it is possible to discharge the wash water in a state where the mixing of bubbles is suppressed and the water is applied from each of the first rim water discharge port 6 and the second rim water discharge port 22.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 4 Back side waterway 4a Rear side waterway entrance (inlet part of rear side waterway)
6 1st rim waterway 6a 1st rim waterway entrance (inlet part of rim waterway)
6b Bottom surface of the first rim waterway (inlet part of the rim waterway)
8 2nd rim waterway 8a 2nd rim waterway entrance (Rim waterway entrance)
8b Bottom surface of second rim conduit (inlet of rim conduit)
10 Bowl 10a Front end in bowl 10b Rear end in bowl 12 Drain trap pipe (drainage)
14 Washing water tank equipment (washing water source, washing water tank)
16 Water storage tank (wash water source, wash water tank)
16a Drain port (tank supply part)
16b Tank supply path (tank supply part)
18 rim 18a inner peripheral surface of rim 18b front end of inner peripheral surface of rim 20 first rim water discharge port (water discharge portion, first rim water discharge portion)
22 2nd rim water outlet (water discharge part, 2nd rim water discharge part)
24 concave part 24a front end of front side wall surface of concave part 24b rear end of rear side wall face of concave part 26 filth receiving surface 28 shelf 30 rectifying part of rear side waterway 30a upper surface of rectifying part 30b bottom surface of rectifying part 32 inclined part of rear side waterway 32a Bottom surface of the inclined portion 32b Upper surface of the inclined portion 32c Inlet of the inclined portion 32d Outlet of the inclined portion A1 Channel sectional area of the A section of the tank supply path A2 Channel sectional area of the B section of the rectifying section of the rear rim conduit A3 Channel cross-sectional area of the inclined portion of the rear rim conduit A4 Channel cross-sectional area near the inlet (C cross-section) of the first rim conduit A5 Channel cross-section of the D section of the first rim conduit A6 First rim guide A7 Channel cross-sectional area of the E-section of the water channel A7 Channel cross-sectional area of the F-section of the first rim conduit A8 Channel cross-sectional area of the G-section of the first rim conduit A8 First rim outlet of the first rim conduit ( H cross-section) Channel cross-sectional area B Rear side area of bowl L Left side region of the bowl F Front region of the bowl H1 Distance on the straight line in the vertical direction from the lowest height position of the inclined portion of the rear rim conduit to the height position of the upper surface of the rectifier H2 Rear rim conduit Distance and height dimension from the bottom surface height position to the top surface position in the rectifying section of H3 H3 The minimum height position of the bottom surface to the top surface height position in the inclined section of the rear rim conduit H4 Inclination of the rear rim conduit Vertical distance and height dimension from the height position of the bottom surface to the height position of the upper surface in the section O The center of the bowl P0 The minimum height position of the bottom surface of the inclined portion of the rear side conduit P1 The rectifier of the rear conduit P2 Height position of the bottom surface of the rectifying part of the rear side conduit P3 Height position of the upper surface of the inclined part of the rear side conduit P4 Height position of the bottom surface of the inclined part of the rear conduit R Bowl Right side area S bowl surface W Purified water W0 Reservoir W1 Maximum lateral width of the rectifying section and inclined section of the rear-side water conduit X Horizontal center axis of the bowl horizontal Y Central axis of the bowl horizontal front and rear direction Y1 First rim discharge from the front end of the bowl Distance in the front-rear direction to the water mouth Y2 Distance from the front edge to the rear edge in the bowl Z Vertical axis passing through the center of the bowl α Inclination angle with respect to the horizontal plane at the bottom of the rear waterway β Horizontal plane on the upper surface of the rear waterway Inclination angle with respect to

Claims (7)

A flush toilet that is washed with wash water supplied from a wash water source and discharges filth,
The toilet body,
A washing water tank that is provided on the upper surface rear side of the toilet body as the washing water source and stores washing water, and includes a tank supply unit that forms a flow path including a drain outlet on the bottom surface. The cleaning water tank for supplying cleaning water to the toilet body,
The toilet body includes a bowl-shaped filth receiving surface and a rim formed on an upper edge of the filth receiving surface,
A rear side water guide passage formed at the rear of the bowl and guiding the wash water supplied from the tank supply section to the rear of the bowl;
A water discharge part that is provided only in the rim and discharges wash water into the bowl to form a swirling flow;
A rim water conduit formed on the downstream side of the rear water conduit, and leading the wash water in the rear water conduit to the water discharge portion;
A drainage channel connected to the bottom of the bowl to discharge filth,
The rear-side water conduit includes an inlet portion to which the tank supply unit is connected, and a rectifying unit that is provided below the inlet portion and rectifies the wash water supplied from the tank supply unit through the inlet unit. An inclined portion that is formed on the downstream side of the rectifying portion and is inclined downward so as to communicate with the rim conduit.
The rectifying unit is set so that a flow passage cross-sectional area thereof is smaller than a flow passage cross-sectional area of the inclined portion, and the flow passage is formed to be substantially horizontal. Flush toilet.   The flush toilet according to claim 1, wherein a flow passage cross-sectional area of the rectifying portion of the rear side water conduit is set to be smaller than a flow passage cross-sectional area of the tank supply portion.   The distance (H2) from the bottom surface to the top surface of the rectifying unit on the same vertical straight line with respect to the distance (H1) on the straight line in the vertical direction from the lowest position of the bottom surface of the inclined portion of the rear water conduit to the top surface of the rectifying unit The ratio (H2 / H1) is the distance in the vertical direction from the bottom surface to the upper surface of the inclined portion on the same vertical straight line to the distance (H3) on the vertical straight line from the lowest position of the bottom surface to the upper surface in the inclined portion. The flush toilet according to claim 2, which is set to be smaller than a ratio (H4 / H3) of (H4).   The inclined portion of the rear side water conduit is inclined downward from the inlet connected to the rectifying portion toward the outlet connected to the rim conduit, and the bottom surface of the inclined portion is downward with respect to the horizontal plane. The flush toilet according to any one of claims 1 to 3, wherein an inclination angle to be inclined is set to be larger than an inclination angle at which an upper surface of the inclined portion is inclined downward with respect to a horizontal plane.   The water discharge portion is disposed on the rim in the front region from the center in the front-rear direction of the bowl, and discharges water forward. The flush toilet according to any one of claims 1 to 4, wherein the flush toilet is provided in a shape.   The rim conduit has a channel cross-sectional area at the inlet portion set to be smaller than the channel cross-sectional area of the water discharge portion, and the bottom surface of the rim conduit has the water discharge from the inlet portion of the rim conduit. The flush toilet according to any one of claims 1 to 5, wherein the flush toilet is formed so as to be inclined downward toward the portion. The water discharger is disposed on the rim on one side and the front side in the left-right direction with respect to the center in the front-rear direction and the left-right direction of the bowl, and discharges wash water toward the front of the bowl to generate a swirling flow. A first rim spouting portion to be formed; A second rim water spouting part that forms a swirling flow in the same direction,
The rim water channel includes a first rim water channel and a second rim water channel that guide the cleaning water in the rear side water channel to the first rim water discharging unit and the second rim water discharging unit, respectively.
The flow passage cross-sectional area of the rectifying unit is set to be smaller than the sum of the flow channel cross-sectional area of the first rim water discharger and the flow channel cross-sectional area of the second rim water discharger. The flush toilet according to any one of 6.

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