JP2021156105A - Water closet - Google Patents

Abstract

To provide a water closet capable of suppressing the entrainment of air while suppressing the turbulence of washing water in a main water channel.SOLUTION: A water closet for supplying washing water to a toilet bowl body to be washed includes the toilet bowl body which includes a bowl part for receiving dirt, a main water channel provided in the toilet bowl body, a water supply opening provided in the toilet bowl body for supplying the washing water supplied from a water supply source into the main water channel, and a rim water channel provided in the toilet bowl body for allowing the washing water supplied into the main water channel to be discharged to the bowl part, the water supply opening being opened to the upward side of the main water channel, the main water channel having a collision surface at a position opposed to the water supply opening in the vertical direction, the collision surface being a convex surface gradually descending as separating from a position opposed to the horizontal center of the water supply opening in the horizontal direction.SELECTED DRAWING: Figure 3

Description

The present invention relates to a flush toilet, and more particularly to a flush toilet that discharges wash water from a rim headrace to a bowl portion of the toilet body.

Conventionally, a flush toilet that discharges wash water from a rim headrace to the bowl portion of the toilet body has been known. In such a flush toilet, the wash water discharged from the rim headrace into the bowl portion becomes a swirling flow to wash the inside of the bowl portion.

For example, as shown in Patent Document 1, the wash water is first supplied from a water supply source such as a water storage tank to a leading water channel formed below the water storage tank. Then, the washing water supplied to the leading water channel flows into the rim headrace formed along the rim portion, passes through the rim headrace, and is discharged from the rim spout opened toward the inside of the bowl portion. ..

Japanese Unexamined Patent Publication No. 2018-11205

According to the findings obtained by the present inventor, when the wash water is supplied from the water storage tank to the lead water channel, the flow of the wash water is disturbed in the lead water channel, and air entrainment occurs. It may end up.

In particular, in recent years, water saving of flush toilets has been progressing, and it is necessary to flush a smaller amount of wash water vigorously in order to perform effective cleaning. As a result, the washing water collides with higher energy and may entrain air in a higher pressure state. When the washing water entrained with such air is discharged from the spout, the pressure of the air may be released (the air bursts) and the washing water may be scattered.

In addition, for example, if the washing water supplied from the water supply source such as a water storage tank to the leading water channel is all saved in a water-washing toilet where water is discharged from the rim spout, all the washing water with strong momentum remains as it is. Since it flows into the rim headrace, it may involve more air.

An object of the present invention is to provide a flush urinal capable of suppressing turbulence of wash water in a leading channel and suppressing air entrainment.

The present invention is a flush toilet that supplies wash water to the toilet body for cleaning, and the toilet body includes a toilet body that defines a bowl portion that receives filth and an initiative provided in the toilet body. The water channel, the water supply opening provided in the toilet body and supplying the wash water supplied from the water supply source into the lead water channel, and the wash water provided in the toilet body and supplied into the lead water channel. It is provided with a rim headrace for discharging water toward the bowl portion, the water supply opening is opened on the upper side of the leading water passage, and the leading water passage collides with a position vertically facing the water supply opening. The water-washing toilet bowl has a surface, and the collision surface is a convex curved surface that is lowered as the distance from the position facing the center of the water supply opening in the left-right direction is increased in the left-right direction.

According to the present invention, since the washing water supplied from the water supply source is received on the convex curved surface that decreases as the water supply opening moves away from the center in the left-right direction in the left-right direction, the momentum of the washing water can be dispersed. As a result, the turbulence of the washing water in the leading water channel can be suppressed, and the entrainment of air can be suppressed. As a result, when the washing water is discharged, it is possible to prevent the air from bursting and scattering the washing water.

Further, the rim headrace has a first rim headrace extending from the left side of the downstream end of the leading headrace to the first spout, and a first rim headrace extending from the right side of the downstream end of the leading headrace to the second spout. It has two rim headraces, and it is preferable that the bottom surface near the downstream end of the lead headrace has a convex curved surface that decreases as the distance from the center in the left-right direction increases in the left-right direction.

According to this, the turbulence of the washing water can be effectively suppressed even in the vicinity of the downstream end of the leading water channel.

Further, it is preferable that the top line of the convex curved surface of the collision surface is positioned so as to pass through a position facing the center of the water supply opening.

According to this, the washing water can be divided into the first rim headrace and the second rim headrace at an appropriate ratio.

Further, it is preferable that the leading water channel has a convex curved surface that descends from the collision surface to the downstream side by a predetermined distance, or from the collision surface to the downstream end as the distance from the center in the left-right direction to the left-right direction. ..

According to this, the washing water can be separated more smoothly toward the downstream side.

According to the present invention, it is possible to provide a flush toilet that can suppress the turbulence of the wash water in the lead water channel and suppress the entrainment of air.

It is a top view which shows the flush toilet by one Embodiment of this invention. FIG. 1 is a cross-sectional view taken along the line II-II of FIG. 1 (however, the water storage tank 4 is not shown). FIG. 2 is a cross-sectional view taken along the line III-III of FIG. FIG. 2 is a sectional view taken along line IV-IV of FIG.

(overall structure)
Hereinafter, a flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view showing a flush toilet according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1 (however, the water storage tank 4 is not shown), and FIG. , FIG. 2 is a cross-sectional view taken along the line III-III, and FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG.

As shown in FIGS. 1 to 4, the flush toilet bowl 1 according to the embodiment of the present invention is a wash-off type flush toilet bowl, and includes a toilet bowl body 2 made of pottery or the like. A water storage tank 4 which is a washing water source is installed above the rear side of the toilet bowl main body 2. The water storage tank 4 is connected to a water supply source (not shown) such as a water supply.

In the following description, the right side when the toilet bowl body 2 is viewed from the front is referred to as the “right side”, and the left side when the toilet bowl body 2 is viewed from the front is referred to as the “left side”.

The cleaning operation is started by operating the operation lever (not shown) provided in the water storage tank 4. Specifically, the drain valve (not shown) of the water storage tank 4 is opened by operating the operation lever, and a predetermined amount of washing water from the water storage tank 4 is supplied from the water storage tank 4 to the supply port 2a (water supply opening) provided on the rear side of the toilet bowl body 2. ) Is to be supplied.

Here, the predetermined amount of washing water is about 3.8 to 6.0 liters, which is less than the amount of washing water (for example, about 13 liters) of a conventional general wash-off type flush toilet.

Instead of the water storage tank 4, another water supply device such as a flush valve capable of supplying a specified amount of washing water may be used.

A bowl portion 8 is formed in the upper front portion of the toilet bowl body 2. The bowl portion 8 has a filth receiving surface 16 formed in a bowl shape, and a rim portion 18 formed on the upper edge portion thereof to discharge washing water to the filth receiving surface 16.

The rim portion 18 of the present embodiment is formed on substantially the entire circumference of the upper edge portion of the bowl portion 8 and overhangs inward. Further, the bottom surface 25 of the rim water passage is formed substantially horizontally in a substantially flat shelf shape inward over substantially the entire circumference of the bowl portion 8. With such a configuration, the washing water flowing on the bottom surface 25 of the rim water passage can form a flow that goes around the upper part of the bowl portion 8, and guides the washing water to each region in the bowl portion 8 in a well-balanced manner. You can do it.

Inside the toilet bowl body 2, the headrace 20 for guiding the washing water introduced from the supply port 2a provided on the rear side of the toilet bowl body 2 into the bowl portion 8 via the bottom surface 25 of the rim water passage. Is provided.

The headrace 20 has a leading headrace 21, a first rim headrace 23a, a first spout 24a, a second rim headrace 23b, and a second spout 24b.

As shown in FIG. 1, the leading water channel 21 is formed from below the water storage tank 4 toward the front of the toilet bowl. The leading headrace 21 is branched into a first rim headrace 23a and a second rim headrace 23b at the downstream end. As a result, the wash water supplied to the lead water channel 21 flows into the first rim headrace 23a and the second rim headrace 23b.

The first rim headrace 23a is formed along the rim portion 18 from the rear to the left of the bowl portion 8. A first spout 24a is formed at the downstream end of the first rim headrace 23a (for example, near the center on the left side of the rim portion 18).

As a result, the wash water flowing from the leading water channel 21 into the first rim headrace 23a flows counterclockwise in a plan view, and then flows from the first spout 24a onto the bottom surface 25 of the rim waterway 25 to form the bowl portion 8. Water is discharged to the filth receiving surface 16 of the above.

The second rim headrace 23b is formed behind the bowl portion 8 and has a bending portion that bends the flow direction of the washing water. A second spout 24b is formed at the downstream end of the second rim headrace 23b (for example, to the right rear of the rim portion 18).

As a result, the wash water flowing from the lead water channel 21 into the second rim headrace 23b flows clockwise in a plan view, the flow direction is bent (reversed) at the bending portion, and flows counterclockwise. 2 Water flows from the water spout 24b on the bottom surface 25 of the rim water passage and is discharged to the filth receiving surface 16 of the bowl portion 8.

As described above, the wash-off type flush toilet bowl 1 according to the present embodiment discharges wash water from the first and second spouts 24a and 24b provided on the rim portion 18, and the filth receiving surface 16 of the bowl portion 8. By generating a swirling flow in the bowl portion 8, the bowl portion 8 is washed.

A water storage portion 12 (lower portion of the bowl portion) is formed below the bowl portion 8, and a predetermined amount of pooled water is stored. The pool surface at the initial water level is indicated by W0. One end side of the drain trap pipeline 14 is continuous or connected to the lower end of the water reservoir 12. The accumulated water functions as a sealing water to prevent odors and the like from the drain trap pipeline 14 from flowing back to the bowl portion 8 side.

(Structure related to the bottom surface of the leading channel 21)
The feature of the present invention is the shape of the bottom surface of the leading channel. Also in this embodiment, the bottom surface of the leading water channel 21 has the following features.

The supply port 2a (water supply opening) is open on the upper side of the leading water channel 21, and the bottom surface of the leading water channel 21 has a collision surface 21a at a position vertically facing the supply port 2a, and the collision surface 21a is provided. As shown in FIG. 3, the surface 21a is a convex curved surface that decreases as the distance from the position facing the center of the supply port 2a in the left-right direction increases in the left-right direction.

The top line (ridge line) of the convex curved surface of the collision surface 21a is positioned so as to pass through a position facing the center of the supply port 2a (a position vertically below the center of the supply port 2a). Further, the convex curved surface of the collision surface 21a is further extended downstream from the collision surface 21a by a predetermined distance to become an extension surface 21b (the collision surface 21a and the extension surface 21b are flush with each other).

A steep slope surface 21c is smoothly (with a radius) continuous on the downstream side of the extension surface 21b, and the steep slope surface 21c is a flat surface. The steep slope surface 21c may also be a convex curved surface that decreases as the distance from the center in the left-right direction increases in the left-right direction.

The collision surface 21a and the extension surface 21b have a gradient of approximately 20 ° in the side view angle, and the steep slope surface 21c has a gradient of approximately 80 ° in the side view angle. However, these values are just a good example.

A first horizontal plane 21d is smoothly (with a radius) continuous on the downstream side of the steep slope surface 21c, and as shown in FIG. 4, the first horizontal plane 21d is also separated from the center in the left-right direction in the left-right direction. It is a convex curved surface that goes down as it goes. (That is, the meaning of "horizontal" in the first horizontal plane 21d is an expression relating to the front-back direction and a convex curved surface in the left-right direction.)

A second horizontal plane 21f is smoothly continuous on the downstream side of the first horizontal plane 21d via a curved surface 21e (which may be understood as a large radius). The curved surface 21e and the second horizontal plane 21f are also convex curved surfaces that decrease as they move away from the center in the left-right direction in the left-right direction. (The meaning of "horizontal" in the second horizontal plane 21f is also an expression related to the front-back direction, and is a convex curved surface in the left-right direction.)

As described above, the bottom surface of the leading water channel 21 of the present embodiment has a convex curved surface that decreases from the collision surface 21a to the downstream end, except for the steep slope surface 21c, as the distance from the center in the left-right direction increases in the left-right direction. There is.

(Action)
Next, the operation (operation) of the flush toilet according to the present embodiment will be described.

When the operation button (not shown) of the cleaning operation panel (not shown) is operated to clean the toilet bowl, the drain valve (not shown) provided in the water storage tank 4 opens, and the water storage tank 4 is used for predetermined cleaning. The amount of water (for example, 3.8 liters) is supplied from the supply port 2a on the rear side of the toilet bowl body 2 to the headrace 20 in the toilet bowl body 2.

Then, the wash water supplied to the headrace 20 is branched into the first rim headrace 23a and the second rim headrace 23b via the lead headrace 21.

The washing water discharged from the first spout 24a through the first rim headrace 23a flows on the bottom surface 25 of the rim water passage, swirls around the upper part of the bowl portion 8, and receives filth from the bottom surface 25 of the rim water passage while swirling. It descends to the surface 16 and cleans the bowl portion 8.

The washing water discharged from the second spout 24b via the second rim headrace 23b also flows on the bottom surface 25 of the rim water passage, swirls the upper part of the bowl portion 8, and receives filth from the bottom surface 25 of the rim water passage while swirling. It descends to the surface 16 and cleans the bowl portion 8.

The washing water that descends while washing the bowl portion 8 is discharged from the drain trap pipeline 14 together with the filth.

Here, the water-washing toilet bowl 1 of the present embodiment supplies the washing water supplied from the water supply source on the collision surface 21a, which is a convex curved surface that decreases as the distance from the position facing the center in the left-right direction of the supply port 2a in the left-right direction. receive. Therefore, the momentum of the washing water can be dispersed, and the turbulence of the washing water in the leading water channel 21 can be suppressed, and the entrainment of air can be suppressed. As a result, when the washing water is discharged from the first spout 24a and the second spout 24b, it is possible to prevent the air from bursting and scattering the washing water.

Further, according to the flush toilet bowl 1 of the present embodiment, the bottom surface (curved surface 21e and the second horizontal plane 21f) near the downstream end of the leading water channel 21 also has a convex curved surface that decreases as the distance from the center in the left-right direction increases in the left-right direction. ing. As a result, the turbulence of the washing water can be effectively suppressed even in the vicinity of the downstream end of the leading water channel 21.

Further, according to the flush toilet bowl 1 of the present embodiment, the top line (ridge line) of the convex curved surface of the collision surface 21a is positioned so as to pass through a position facing the center of the supply port 2a. As a result, the washing water can be more evenly distributed to the first rim headrace 23a and the second rim headrace 23b.

Further, according to the flush toilet bowl 1 of the present embodiment, the leading water channel 21 has a convex curved surface that descends from the collision surface 21a to the downstream end as the distance from the center in the left-right direction increases in the left-right direction. As a result, the washing water can be separated more smoothly toward the downstream side.

However, the bottom surface of the leading water channel 21 may have a convex curved surface that decreases as the distance from the center in the left-right direction increases in the left-right direction in the entire region including the steep slope surface 21c from the collision surface 21a to the downstream end. ..

1 Washable toilet (wash-off type flush toilet)
2 Toilet bowl body 2a Supply port 4 Water storage tank 8 Bowl part 12 Water storage part 14 Drain trap pipeline 16 Sewage receiving surface 18 Rim part 20 Headrace 21 Leading waterway 21a Collision surface 21b Extension surface 21c Steep slope surface 21d First horizontal plane 21e Curved Surface 21f 2nd horizontal plane 23a 1st rim headrace 23b 2nd rim headrace 24a 1st spout 24b 2nd spout 25 Bottom of rim headrace

Claims (5)

A flush toilet that supplies wash water to the toilet body for cleaning.
The toilet body is
The bowl part that receives filth and
The leading waterway provided in the toilet body and
A water supply opening provided in the toilet bowl body and supplying wash water supplied from the water supply source into the leading water channel, and a water supply opening.
A rim headrace provided in the toilet body and discharging wash water supplied into the lead waterway toward the bowl portion.
With
The water supply opening is open on the upper side of the leading water channel.
The leading water channel has a collision surface at a position vertically opposed to the water supply opening.
A flush toilet bowl characterized in that the collision surface is a convex curved surface that is lowered as the water supply opening is separated from a position facing the center in the left-right direction in the left-right direction. The rim headrace
A first rim headrace extending from the left side of the downstream end of the lead headrace to the first spout,
A second rim headrace extending from the right side of the downstream end of the lead headrace to the second spout,
Have and
The flush toilet according to claim 1, wherein the bottom surface in the vicinity of the downstream end of the leading water channel has a convex curved surface that decreases as the distance from the center in the left-right direction increases in the left-right direction. The flush toilet according to claim 2, wherein the top line of the convex curved surface of the collision surface is positioned so as to pass through a position facing the center of the water supply opening. 7. Washing toilet bowl. The flush toilet according to any one of claims 1 to 3, wherein the leading water channel has a convex curved surface that descends from the collision surface to the downstream end as the distance from the center in the left-right direction increases in the left-right direction. ..

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