JP2018165463A - Water closet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water closet that cleans a dirt receiving surface by a swirling flow, which can improve discharge performance of a floating dirt even when an amount of cleaning water is reduced by water saving.SOLUTION: A wash-out type water closet includes: a bowl part having a dirt receiving surface, a rim part and a recess; a rim discharge part that forms a swinging flow swinging along an inner peripheral surface of the rim part; and a riser tube path that has an inlet port connected to the recess of the bowl part and is formed so as to rise from the inlet port toward the rear part, where the bowl part is structured so that cleaning water discharged from the rim discharge part forms a main stream flowing toward the inlet port of the riser tube path rather than a front side of the bowl part, the riser tube path is constituted of a top surface forming an upper region above a central axis line in a flow direction of the cleaning water and a bottom surface forming a lower region below the central axis line, and the bottom surface has a projection projecting toward the direction of the top surface in the vicinity of the inlet port of the riser tube path.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a flush toilet, and more particularly to a wash-off flush toilet that flushes the toilet body with wash water supplied from a wash water source and discharges filth.

2. Description of the Related Art Conventionally, a flush toilet is known that swirls cleaning water discharged from a rim spout along an inner peripheral surface of a rim portion and cleans a filth receiving surface by a swirling flow.
In such flush toilets, there is a problem that the force for pushing the washing water into the ascending pipeline of the drainage pipeline is weak, and the discharge performance of floating filth is poor.
Therefore, as in Patent Document 1, a siphon type flush toilet is known in which a jet spout for discharging wash water toward a rising pipe of a drain pipe is provided in a concave portion of a bowl portion. In the flush toilet of Patent Document 1, floating filth is discharged from the drainage pipe by the pulling force due to siphon action and the pushing force by the washing water discharged from the jet outlet, and the discharge performance of the floating filth is lowered. Was suppressed.

  However, in the flush toilet as disclosed in Patent Document 1, since a siphon action occurs and water is discharged from the jet outlet, a large flow of washing water is required, and it is difficult to satisfy the recent demand for water saving.

Therefore, as in Patent Document 2, the main flow of the swirling flow formed by the wash water discharged from the rim spout is poured from the front of the filth receiving surface toward the inlet of the ascending pipeline of the drainage pipe toward the rear. A flush toilet is known.
In this patent document 2, since it is a wash-off type, no washing water for generating a siphon action is necessary, and it is caused to flow backward from the front of the waste receiving surface to the inlet of the rising pipe of the drainage pipe. Since the floating filth can be pushed into the ascending pipe by the main flow of the swirling flow and the floating filth can be discharged from the drain pipe, the pushing force by the washing water discharged from the jet outlet is unnecessary.
Therefore, even when the amount of washing water is reduced due to water saving, it is possible to suppress a decrease in the discharge performance of floating filth.

Japanese Patent No. 5429688 JP 2011-157738 A

However, as in Patent Document 2, when the floating filth is discharged by the main flow of the swirling flow, the washing water is greatly changed in the direction of the main flow at the concave portion of the bowl portion and the inlet of the ascending pipeline of the drainage pipe. In the ascending pipeline connected to the concave portion of the bowl portion, the velocity of the main flow flowing in the lower region of the rising pipeline is higher than the velocity of the main flow flowing in the upper region of the rising pipeline. Therefore, if stagnation occurs in the upper area of the ascending pipeline of the drainage pipe, and floating filth enters the stagnation, the floating filth stays without being pushed out of the drainage pipe, resulting in poor floating filth discharge performance. There was a problem of becoming.
In particular, in the flush toilet bowl, the channel cross-sectional area of the drainage pipe is larger than the channel cross-sectional area of the siphon flush flush toilet. Become prominent.

  The present invention has been made in order to solve the above-mentioned problem, and the problem of the present invention is that in a flush toilet that cleans a waste receiving surface by a swirling flow, even when the amount of washing water is reduced by water saving, the floating system The purpose is to improve the discharge performance of filth.

In order to achieve the above-mentioned object, the present invention is a wash-out type flush toilet that cleans the toilet body with the wash water supplied from the wash water source and discharges the waste, and is located on the waste receiving surface and the upper edge. A bowl portion having a rim portion to be formed, and a concave portion formed below the filth receiving surface, and a swirling flow swirling along the inner peripheral surface of the rim portion by discharging cleaning water toward the bowl portion. The rim water spouting part and an ascending conduit formed so that the inlet is connected to the concave part of the bowl part and rises rearward from the inlet, and the bowl part is washed water discharged from the rim water spouting part. Is formed so as to form a main flow that flows from the front side of the bowl portion toward the inlet of the rising pipe, and the rising pipe is an upper region above the central axis of the flow direction of the washing water in the rising pipe And the lower surface below the central axis Is composed of a bottom surface which forms a square region, the bottom is in the vicinity of the inlet of the riser passage, and having a protrusion protruding in the direction of the top surface.
In the present invention configured as described above, the main flow that flows near the bottom surface forming the lower region of the rising pipe rides on the convex portion near the inlet of the rising pipe, so that the flow direction of the main flow is in the top surface direction. Instead, the mainstream flow having a relatively high flow velocity can be directed to the vicinity of the top surface forming the upper region of the ascending pipeline.
Therefore, it is possible to suppress the occurrence of stagnation in the vicinity of the top surface forming the upper region due to the deviation of the velocity distribution in the ascending pipeline, and to improve the discharge performance of floating filth.

In the present invention, preferably, the convex portion is formed in a curved shape as a whole in a sectional view along the flow direction of the cleaning water.
In the present invention configured as described above, when the main flow flowing in the lower area of the rising pipe rides on the convex portion, it does not go to the upper area of the rising pipe but continues to the bottom surface of the lower area of the rising pipe. Since the flow of the main flow that flows along can be formed smoothly and the decrease in the speed of the washing water can be suppressed, the discharge performance of floating filth can be improved more efficiently.

In the present invention, preferably, the convex portion is formed from the bottom surface on the downstream side of the inlet of the ascending pipeline which is the lowest point of the bottom surface of the ascending pipeline.
In the present invention configured as described above, a convex portion is formed from the downstream side of the lowest point of the bottom surface where discarded filth tends to accumulate, and a lot of filth is generated before the mainstream flows into the ascending pipeline. Even if it adheres to a convex part and a mainstream flows in into a riser pipe, it can control that it is not discharged from a riser pipe, adhering to a convex part.

In the present invention, it is preferable that the convex portion has the largest protrusion ratio at the center in a cross-sectional view orthogonal to the flow direction of the cleaning water.
In the present invention configured as above, in the center in a cross-sectional view perpendicular to the flow direction of the main flow of the ascending pipeline where the main flow is the most and the stagnation in the vicinity of the top surface forming the upper region is likely to occur. The main stream can be directed to the upper region of the ascending pipe most, and the deterioration of the drainage performance can be efficiently suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, in the flush toilet which wash | cleans a filth receiving surface by a swirl flow, even when the amount of washing water is reduced by water saving, the discharge performance of floating filth can be improved.

1 is a side cross-sectional view of a flush toilet bowl according to an embodiment of the present invention. It is a top view of the flush toilet bowl of FIG. It is an expanded side sectional view of the drainage pipe line of the flush toilet bowl according to the embodiment of the present invention. FIG. 4 is a flow path cross-sectional view of a drainage conduit of a wash-out flush toilet as viewed along line IV-IV in FIG. 3. It is side surface sectional drawing which shows the flow of the wash water in the ascending pipeline of the wash-off type flush toilet according to the embodiment of the present invention.

Hereinafter, a flush toilet bowl according to an embodiment of the present invention will be described with reference to the accompanying drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.
First, the basic structure of a flush-type flush toilet according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a side sectional view of a flush toilet bowl according to an embodiment of the present invention. FIG. 2 is a plan view of the flush-type flush toilet of FIG.

  As shown in FIGS. 1 and 2, a flush toilet bowl 1 according to an embodiment of the present invention is a flush toilet bowl (wash) that discharges filth using a drop due to a rise in water level in a drainage pipe, which will be described later. The toilet bowl body 2 and a water storage tank (shown in the figure), which is a washing water source, attached to the upper rear part of the toilet body 2. The water storage tank is provided with a drain valve, which is opened and closed by operating an operation lever so that flush water is supplied to the toilet body 2.

  The toilet body 2 includes a bowl portion 4 and a drain pipe 6 for discharging filth from the bowl portion 4. Moreover, the toilet bowl body 2 has a water flow chamber 8 (see FIG. 2) in which wash water for washing the bowl portion 4 is supplied from a water storage tank.

  The bowl portion 4 includes a bowl-shaped filth receiving surface 10, a rim portion 12 that is located on the upper edge of the filth receiving surface 10, and an upper portion of the inner peripheral surface projects inward, and the filth receiving surface 10. And a rim portion 12, and a recess portion 16 formed below the filth receiving surface 10.

The drainage pipe 6 is formed with an inlet 6a connected to the concave portion 16 of the bowl portion 4, and a rising pipe 18 extending obliquely upward from the inlet 6a, and extending obliquely downward from the highest point 6b. And a descending pipe line 20 in which an outlet 6c of the drain pipe line 6 connected to the lower pipe pipe 20 is formed.
The stored water level L of the flush toilet 1 is equal to the height of the highest point 6 b of the drain line 6.
Further, the drainage pipe 6 has a pipe diameter larger than that provided in the siphon flush toilet.

As shown in FIG. 2, on the inner peripheral surface of the rim portion 12 located on the left rear side when viewed from the front of the bowl portion 4, a first water discharge port 22 for discharging cleaning water is formed on the shelf portion 14. Yes.
Further, a second water discharge port 24 for cleaning water is formed on the shelf 14 on the inner peripheral surface of the rim portion 12 located on the right rear side when viewed from the front of the bowl portion 4. The cleaning water discharged from the second water outlet 24 has a smaller flow rate than the cleaning water discharged from the first water outlet 22.
In the present embodiment, the first water discharge port 22 is a rim water discharge unit.

  The water flow chamber 8 is provided at the rear part of the toilet body 2, the rear end side communicates with a water storage tank (not shown), and the front end side is a first passage for supplying wash water to the first water outlet 22. A second water passage 28 is provided for supplying cleaning water to the water passage 26 and the second water outlet 24, respectively.

Here, the wash water supplied from the water storage tank to the water flow chamber 8 passes through the first water flow path 26 and the second water flow path 28 and is discharged from the first water discharge port 22 and the second water discharge port 24 onto the shelf 14. The
The wash water discharged from the first water discharge port 22 forms a swirling flow in the bowl portion 4, and the wash water discharged from the second water discharge port 24 has the same direction as the wash water discharged from the first water discharge port 22. A swirling flow that swirls (turns counterclockwise) is formed.
The main flow M, which is the majority of the swirling flow of the washing water discharged from the first water discharge port 22, enters the recess 16 from the front side of the bowl portion 4 toward the inlet 6 a of the ascending pipeline 18 in the drainage pipeline 6. The filth that flows in and accumulates in the water stored in the recess 16 is pushed into the ascending pipe 18 of the drain pipe 6.
Further, the main flow S, which is the majority of the washing water discharged from the second water discharge port 24, flows into the recess 16 from the side of the bowl portion 4 and swirls up and down the water stored in the recess 16 to stir the filth. The flow to be formed.

Next, the detailed structure of the drain pipe 6 will be described with reference to FIGS. 3 and 4.
FIG. 3 is an enlarged side cross-sectional view of the drainage conduit of the flush toilet bowl according to the embodiment of the present invention. FIG. 4 is a cross-sectional view of the drain line of the flush toilet bowl as seen along line IV-IV in FIG. In FIG. 4, the dotted line is a virtual sectional line that represents the bottom surface when there is no convex portion.

As shown in FIGS. 3 and 4, the ascending pipeline 18 includes a top surface 30 connected to the upper wall surface of the recess 16 and a bottom surface 32 connected to the lower wall surface of the recess 16.
Here, in the ascending pipeline 18, the top surface 30 side from the central axis A in the flow direction of the washing water is defined as an upper region and the bottom surface 32 side from the central axis A is defined as a lower region.
That is, the rising pipe line 18 forms an upper region by the top surface 30 and forms a lower region by the bottom surface 32.

The top surface 30 is formed of a horizontal wall extending horizontally and side walls falling from both sides thereof.
Since the wash-off flush toilet 1 in the present embodiment is a flush toilet with an inexpensive structure, a part of the wall of the top surface 30 is shared by a part of the wall of the recess 16 and the common wall 34. The inclination angle of the rising pipe 18 of the drain pipe 6 is larger than that of a flush toilet manufactured without using a wall surface.

The bottom surface 32 includes a horizontally extending horizontal wall and side walls rising from both sides thereof. The side wall of the bottom surface 32 is connected to the side wall of the top surface 30.
The bottom surface 32 is formed so as to rise at an inclination angle equivalent to that of the top surface 30.

As shown in FIG. 3, the bottom surface 32 is provided with a convex portion 36 formed to protrude from the bottom surface 32 toward the top surface 30 in the vicinity of the inlet 6 a of the ascending pipeline 18.
This convex part 36 is made to protrude toward the top | upper surface 30 side by denting a part of bottom face 32 from the downward direction.
The convex portion 36 rides washing water flowing in the vicinity of the bottom surface 32, thereby changing the direction of the washing water to the top surface 30 direction and can be directed to the upper region of the ascending pipeline 18.

Moreover, the convex part 36 is formed in the shape where the whole was curved in the cross sectional view along the flow direction of washing water, and the protrusion to the top | upper surface 30 side does not become large suddenly.
Specifically, the protrusion 36 gradually protrudes toward the top surface 30 from the starting point 36a at which the protrusion starts to the top surface 30 side in a cross-sectional view along the flow direction of the cleaning water, and is most at the top surface 30 side at the vertex 36b. After the protrusion, the protrusion toward the top surface 30 gradually decreases, and the protrusion toward the top surface 30 continues until the end point 36c.
At this time, the vertex 36b is the midpoint of the distance D1 from the start point 36a to the end point 36c.
Further, the starting point 36 a is positioned downstream of the position of the inlet 6 a that is the lowest point of the bottom surface 32.
In this embodiment, the ratio of the distance D2 from the inlet 6a to the highest point 6b and the distance D3 from the inlet 6a to the starting point 36a is the downstream side of the position of the inlet 6a where the starting point 36a is located. A position in the range of 1: 3 to 1: 5.

Here, in the convex portion 36, the distance D1 from the start point 36a to the end point 36c is preferably 20 mm to 30 mm, and the distance D3 from the inlet 6a to the start point 36a is preferably 35 mm to 50 mm.
In addition, the protrusion amount H1 from the start point 36a at the vertex 36b is preferably 5 mm to 10 mm.

As shown in FIG. 4, the convex portion 36 is formed on the horizontal wall of the bottom surface 32 in a cross-sectional view orthogonal to the flow direction of the cleaning water.
In the cross-sectional view orthogonal to the flow direction of the cleaning water, the protrusion 36 has a protrusion amount H2 from the virtual bottom surface 38 indicated by a dotted line that is the highest at the center, and protrudes from the center to the side. Is low.
That is, the protrusion 36 has the highest protrusion rate at the center in the cross-sectional view orthogonal to the flow direction of the wash water, and more of the wash water at the center in the cross-sectional view orthogonal to the flow direction of the wash water. Can be directed to the upper region.
Note that the virtual bottom surface 38 is a bottom surface when the convex portion 36 is not formed, and is a bottom surface when a part of the bottom surface 32 is not recessed from below but continuously rises.
Further, in the present embodiment, the convex portion 36 is not formed on the entire bottom surface 32 and is formed on the horizontal wall of the bottom surface 32 in a cross-sectional view orthogonal to the flow direction of the cleaning water. It may be formed.

  Next, the operation of the toilet device according to the above-described embodiment of the present invention will be described with reference to FIG. FIG. 5 is a side cross-sectional view showing the flow of wash water in the ascending pipeline of the flush toilet bowl according to the embodiment of the present invention.

First, according to the flush toilet bowl 1 according to the embodiment of the present invention, the wash discharged from the first spout 22 that flows from the front side of the bowl portion 4 into the inlet 6a of the rising pipe 18 in the drain pipe 6 is performed. When the main flow M of the swirling flow due to water flows into the inlet 6 a of the ascending pipeline 18, the flow direction of the main flow M changes abruptly, so that a speed difference occurs between the upper region and the lower region of the ascending pipeline 18. Specifically, in the vicinity of the inlet 6 a of the rise pipe 18 of the drain pipe 6, the flow velocity of the main flow M is higher in the region above the rise pipeline 18 than the flow velocity of the main flow M 1 flowing in the lower region of the rise pipeline 18. The flow velocity of the flowing main flow M2 is slower.
At this time, in the vicinity of the inlet 6 a of the rising pipe 18 of the drain pipe 6, the main flow M <b> 1 flowing in the lower region of the rising pipe 18 rides on the convex portion 36, so that the flow direction of the main flow M <b> 1 changes to the top surface 30 direction. The flow of the main flow M3 having a relatively high flow velocity can be directed to the upper region of the ascending pipeline 18. Then, the flow of the main flow M3 flowing in the direction of the top surface 30 joins with the main flow M2 flowing in the upper region of the ascending pipeline 18, so that the flow of the main flow M2 flowing in the upper region is also relatively fast. In addition, a part of the main flow M1 forms a flow of the main flow M4 and flows in the lower region of the ascending pipeline 18 along the bottom surface 32 as it is.
Therefore, it is possible to suppress the occurrence of stagnation in the vicinity of the top surface 30 that forms the upper region due to the deviation of the velocity distribution in the ascending pipeline 18, and the discharge performance can be improved.

  Further, according to the flush toilet bowl 1 according to the embodiment of the present invention, since the convex portion 36 is formed in a curved shape in a sectional view along the flow direction, the ascending pipe line is formed on the convex portion 36. When the main flow M1 flowing in the lower region of 18 rises, the flow of the main flow M4 flowing continuously along the bottom surface 32 of the lower region of the ascending pipeline 18 is smoothly formed without going to the upper region of the ascending pipeline 18. And since the fall of the speed of the mainstream M4 can be suppressed, discharge performance can be improved more efficiently.

  Moreover, according to the flush toilet bowl 1 according to the embodiment of the present invention, the starting point 36a of the convex portion 36 is located downstream of the position of the inlet 6a that is the lowest point of the bottom surface 32 where waste filth tends to accumulate. Because of the position, a large amount of filth adheres to the convex portion 36 before the washing water M flows into the drain pipe 6 and rises while adhering to the convex portion 36 even after the main flow M flows into the rising pipe 18. It can suppress that it is not discharged | emitted from the pipe line 18. FIG.

  Moreover, according to the flush toilet bowl 1 according to the embodiment of the present invention, the convex portion 36 has the highest protrusion rate at the center in a cross-sectional view orthogonal to the flow direction of the wash water (see FIG. 4). Therefore, the main flow M3 flows in the center in a cross-sectional view perpendicular to the flow direction of the washing water in the ascending pipeline 18 where the main flow M2 flows most and the stagnation in the vicinity of the top surface 30 forming the upper region is likely to occur. It can be directed to the upper region of the ascending pipeline 18 most, and the drainage performance of the floating filth can be improved more efficiently.

The embodiment of the present invention has been described above. However, the present invention is not limited to these descriptions, and any modifications that are appropriately modified by those skilled in the art with respect to the above-described embodiments are within the scope of the present invention as long as they include the features of the present invention. Is included.
For example, in the present embodiment, most of the washing water S discharged from the second water discharge port 24 flows into the recess 16 from the side of the bowl portion 4, swirls up and down the stored water in the recess 16, and the filth However, the present invention is not limited to this, and a water discharge port that forms a flow of stirring the sewage by turning the accumulated water in the concave portion 16 up and down may be provided on the side wall surface of the concave portion.

DESCRIPTION OF SYMBOLS 1 Wash-out flush toilet 2 Toilet body 4 Bowl part 6 Drainage pipe 6a Inlet 6b Highest point 6c Outlet 8 Water flow chamber 10 Soil receiving surface 12 Rim part 14 Shelf part 16 Recessed part 18 Ascending pipe line 20 Down pipe line 22 1st Water outlet 24 Second water outlet 26 First water passage 28 Second water passage 30 Top surface 32 Bottom surface 34 Common wall 36 Convex portion 36a Start point 36b Vertex 36c End point 38 Virtual bottom surface

Claims (4)

A flush toilet bowl that cleans the toilet bowl body with wash water supplied from a wash water source and discharges filth;
A bowl portion comprising a filth receiving surface, a rim portion located at the upper edge, and a recess formed below the filth receiving surface;
A rim water spouting part that spouts cleaning water toward the bowl part and forms a swirling flow swirling along the inner peripheral surface of the rim part;
An inlet is connected to the concave portion of the bowl portion, and a rising pipe formed so as to rise rearward from the inlet, and
The bowl portion is configured to form a main flow in which wash water discharged from the rim water discharge portion flows from the front side of the bowl portion toward the inlet of the ascending pipeline,
The rising pipe is composed of a top surface that forms an upper region above the central axis in the flow direction of the washing water in the rising pipe, and a bottom surface that forms a lower region below the central axis. The flush toilet bowl is characterized in that the bottom surface has a convex portion protruding toward the top surface in the vicinity of the entrance of the ascending pipeline.   2. The flush-type flush toilet according to claim 1, wherein the convex part is formed in a curved shape as a whole in a sectional view along the flow direction of the washing water.   3. The flush-type flush toilet according to claim 2, wherein the convex portion is formed from the bottom surface downstream of the inlet of the ascending pipeline that is the lowest point of the bottom surface of the ascending pipeline. .   The flush toilet bowl according to claim 3, wherein the convex portion has the largest protrusion rate in the center in a cross-sectional view orthogonal to the flow direction of the washing water.

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