JP6890774B2 - Washing toilet bowl - Google Patents

Description

The present invention relates to a water-washing toilet bowl, and in particular, a water-washing size capable of submerging floating waste in a bowl portion in a pool of water and efficiently discharging it into a drainage pipe, and improving the waste discharge performance. Regarding toilet bowls.

Conventionally, for example, as described in Patent Document 1, the washing water discharged from the first water discharge portion of the rim flows along the shelf portion, and while swirling, the filth receiving surface of the bowl portion is washed and the bowl is cleaned. There is known a flush urinal in which the washing water that has flowed into the bottom of the portion and is discharged from the second spouting portion of the Zet flows down to the bottom of the bowl portion and stirs the accumulated water in the bowl portion up and down.
On the other hand, for example, as described in Patent Document 2, wash water is discharged only from the two rim spouts of the rim, the first spout and the second spout, and swirls on the filth receiving surface of the bowl portion. It is also known about the flush urinals that are supplied as. In this flush toilet, the wash water flowing out from the second spout flows down continuously from the rear part of the standing surface of the bowl part along the convexly curved surface to the rear side, and directly of the drain trap. Washing water is supplied toward the entrance.

Japanese Patent No. 3975486 Japanese Unexamined Patent Publication No. 2011-157738

However, since the water-washing toilet bowl of Patent Document 1 described above is provided with a second spout that stirs the accumulated water up and down, it is excellent for discharging floating filth, but it cleans the filth receiving surface. Since the amount of water discharged from the first spout is small, there is a problem that sufficient cleaning cannot be performed to clean the filth receiving surface.
Further, in the water-washing toilet bowl of Patent Document 2 described above, the filth receiving surface can be sufficiently washed with the washing water discharged from the two rim spouts of the first spout and the second spout of the rim. However, since the accumulated water mixed with the floating filth cannot be agitated up and down, there is a problem that the floating filth cannot be discharged well and remains. Therefore, in a flush toilet that discharges water only from the first spout and the second spout of the rim, how to stir the accumulated water up and down is also a problem to be solved.

Therefore, the present invention has been made to solve the problems and problems of the prior art, and the floating filth in the bowl portion can be submerged in the reservoir water and efficiently discharged into the drainage pipe line. The purpose is to provide a flush toilet that can improve the waste discharge performance.

In order to achieve the above-mentioned object, the present invention is a flush toilet that cleans the toilet bowl with washing water supplied from a water supply source and discharges filth, and has a bowl-shaped filth receiving surface and the filth receiving surface. A rim portion located above the sewage receiving surface and a recess formed below the filth receiving surface, and the bottom surface where the recess is located below the accumulated water level, and a lower edge portion of the bottom surface and the filth receiving surface. A bowl portion provided with a wall surface connecting the two, and a water discharge portion for supplying washing water into the bowl portion, which is located at the rim portion on one side in the left-right direction of the bowl portion and of the bowl portion. A first rim spouting portion that discharges wash water toward the front and a first rim portion that is located on the other side of the bowl portion in the left-right direction and discharges wash water toward the one side of the bowl portion. The bowl portion has a two-rim water discharge portion, the water discharge portion having only the water discharge portion, and a drainage pipe line whose inlet is connected to the recess to discharge filth, and the bowl portion is discharged from the first rim water discharge portion. The washing water is configured to form a main stream that flows into the recess from the front side of the bowl portion, is discharged from the second rim water discharge portion, and is discharged from the second rim water discharge portion to the filth receiving surface behind the recess. The mainstream of the washing water that has started to flow down due to the filth receiving surface that flows sideways toward the recess and is inclined downward behind the recess flows into the recess until it swirls to the filth receiving surface in front of the recess. It is characterized in that it is configured to join the main stream from the first rim water discharge portion in the recess and submerge the filth in the bowl portion in the pooled water.
In the present invention configured as described above, the washing water discharged from the first rim water discharge portion flows into the recess as the main stream from the front side of the bowl portion, and the second rim water discharge is made with respect to the main flow flowing into the recess. Since the washing water discharged from the portion merges from the lateral direction, the accumulated water in the recess can be effectively agitated in the vertical direction. Therefore, the filth receiving surface of the bowl portion can be sufficiently washed with the washing water discharged from each of the first rim water discharge portion and the second rim water discharge portion, and a flow of stirring in the vertical direction is generated in the recess. be able to. As a result, the filth in the bowl portion can be submerged in the reservoir water and efficiently discharged into the drainage pipe, and the filth discharge performance can be improved.
Further, for example, in the present invention configured as described above, the washing water discharged from the first rim water discharge portion flows into the recess as the main flow from the front side of the bowl portion, and the second main flow flows into the recess. Since most of the washing water discharged from the rim water discharge portion merges from the lateral direction, the accumulated water in the recess can be more effectively agitated in the vertical direction. Therefore, the filth receiving surface of the bowl portion can be sufficiently washed with the washing water discharged from each of the first rim water discharge portion and the second rim water discharge portion, and a flow of stirring in the vertical direction is generated in the recess. be able to. As a result, the filth in the bowl portion can be submerged in the reservoir water and efficiently discharged into the drainage pipe, and the filth discharge performance can be improved.

In the present invention, preferably, the sewage receiving surface of the bowl portion includes a rear side sewage receiving surface formed in a shelf shape in the rear side region near the downstream of the second rim water discharge portion, and the second rim water discharge portion. The washing water discharged from the water flows on the rear side filth receiving surface and is guided to the front side region of the recess.
In the present invention configured as described above, the washing water discharged from the second rim water discharge portion is guided to the front side region of the recess by flowing through the rear side filth receiving surface formed in a shelf shape. The washing water from the second rim water discharge portion can be reliably merged with the main flow from the first rim water discharge portion from the lateral direction, and the accumulated water in the recess can be effectively agitated in the vertical direction. Therefore, the filth receiving surface of the bowl portion can be sufficiently washed with the washing water discharged from each of the first rim water discharge portion and the second rim water discharge portion, and a vertical stirring flow is generated in the recess. be able to. As a result, the floating filth can be submerged in the reservoir water and efficiently discharged into the drainage pipe, and the filth discharge performance can be improved.

In the present invention, preferably, the ratio (L / w2) of the width (L) of the rear side filth receiving surface formed in the shape of a shelf to the width (w2) of the second rim water discharge portion is 2 to 10. is there.
In the present invention formed in this way, the ratio (L / w2) of the width (L) of the rear side filth receiving surface formed in a shelf shape to the width (w2) of the second rim water discharge portion is 2 to 10 Therefore, the washing water discharged from the second rim water discharge portion flows through the rear side filth receiving surface formed in a shelf shape and is guided to the front side region of the recess, so that the wash water is guided from the first rim water discharge portion. The wash water from the second rim spouting portion can be reliably merged with the main stream from the lateral direction, and the accumulated water in the recess can be effectively agitated in the vertical direction. Therefore, the filth receiving surface of the bowl portion can be sufficiently washed with the washing water discharged from each of the first rim water discharge portion and the second rim water discharge portion, and a vertical stirring flow is generated in the recess. be able to. As a result, the floating filth can be submerged in the reservoir water and efficiently discharged into the drainage pipe, and the filth discharge performance can be improved.

In the present invention, preferably, in a plan view, the bottom surface is formed in the front side region, and the area of the bottom surface is set to half or more of the area of the water reservoir surface.
In the present invention configured as described above, since the area of the bottom surface formed in the front region of the recess in the plan view is set to more than half the area of the water reservoir surface, water is discharged from the second rim water discharge portion. The washed water can sneak into the bottom surface of the recess and effectively form a flow for stirring the accumulated water in the vertical direction along the wall surface of the recess. Therefore, the filth receiving surface of the bowl portion can be sufficiently washed with the washing water discharged from each of the first rim water discharge portion and the second rim water discharge portion, and a flow of stirring in the vertical direction is generated in the recess. be able to. As a result, the floating filth in the bowl portion can be submerged in the reservoir water and efficiently discharged into the drainage pipe, and the filth discharge performance can be improved.

In the present invention, preferably, the bowl portion is formed with a headrace for the washing water discharged from the first rim spouting portion to swirl along the inner peripheral surface of the rim portion. It is formed so as to gradually incline downward from the first rim water discharge portion toward the front end of the bowl portion and gradually incline upward from the front end toward the rear side.
In the present invention configured as described above, a headrace for the washing water discharged from the first rim spouting portion to swirl along the inner peripheral surface of the rim portion is formed in the bowl portion, and this headrace is formed. The first rim water discharge portion is formed so as to gradually incline downward from the first rim water discharge portion toward the front end of the bowl portion and gradually incline upward from the front end toward the rear side. The washing water from the bowl can be effectively flowed into the recess from the front side as a mainstream. Further, since the washing water from the second rim water discharge portion joins from the lateral direction with respect to the main flow flowing into the recess, the accumulated water in the recess can be effectively agitated in the vertical direction. Therefore, the filth receiving surface of the bowl portion can be sufficiently washed with the washing water discharged from each of the first rim water discharge portion and the second rim water discharge portion, and a vertical stirring flow is generated in the recess. be able to. As a result, the floating filth can be submerged in the reservoir water and efficiently discharged into the drainage pipe, and the filth discharge performance can be improved.

In the present invention, preferably, the filth receiving surface gradually inclines downward from the vicinity of the central portion of the filth receiving surface on the rear side toward the filth receiving surface in front of the recess, and bypasses the recess. It forms the surface to be formed .
In the present invention configured as described above, the filth receiving surface gradually inclines downward from the vicinity of the central portion of the filth receiving surface on the rear side toward the filth receiving surface in front of the recess, and bypasses the recess. By forming the surface formed so as to be formed, in addition to the wash water discharged from the first rim water discharge part, a part of the wash water discharged from the second rim water discharge part is also discharged from the front side. It can flow into the recess.

In the present invention, preferably, the opening of the first rim water discharge portion is formed in a vertically long flat shape.
In the present invention configured as described above, since the opening of the first rim water discharge portion is formed in a vertically long flat shape, the washing water discharged from the first rim water discharge portion falls on the filth receiving surface. It is possible to swivel to the front end of the bowl portion without getting stuck, and it is possible to effectively form a main stream that flows into the recess from the front side.

According to the water-washing toilet bowl of the present invention, the floating filth in the bowl portion can be submerged in the pooled water and efficiently discharged into the drainage pipe, and the filth discharge performance can be improved.

It is a top view which shows the flush toilet by one Embodiment of this invention. It is sectional drawing seen along the line II-II of FIG. It is sectional drawing seen along the line III-III of FIG. It is sectional drawing seen along the IV-IV line of FIG. It is sectional drawing seen along the VV line of FIG. It is sectional drawing seen along the VI-VI line of FIG. It is sectional drawing seen along the line VII-VII of FIG. It is sectional drawing seen along the line VIII-VIII of FIG. It is sectional drawing seen along the IX-IX line of FIG. It is sectional drawing seen along the X-ray line of FIG. FIG. 1 is a partially enlarged plan view of a bowl portion of a toilet bowl body of a flush toilet according to an embodiment of the present invention shown in FIG. 1. It is sectional drawing of the 1st spout of the flush toilet by one Embodiment of this invention. It is sectional drawing of the 2nd spout of the flush toilet by one Embodiment of this invention. It is a top view which shows the state of the flow of the washing water of the flush toilet by the embodiment of this invention. FIG. 14 is a cross-sectional view of FIG. It is the schematic perspective view which shows the state of the flow | flow of the washing water of the flush toilet by embodiment of this invention.

Next, a flush toilet according to an embodiment of the present invention will be described with reference to FIGS. 1 to 13.
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, and FIG. 3 is III of FIG. It is sectional drawing seen along line −III. Further, FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 1, FIG. 5 is a cross-sectional view taken along the line VV of FIG. 1, and FIG. 6 is a cross-sectional view taken along the line VV of FIG. It is sectional drawing seen along the VI-VI line of. Further, FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG. 1, and FIG. 8 is a cross-sectional view taken along the line VIII-VIII of FIG.

As shown in FIGS. 1 to 3, the water-washing toilet bowl 1 is a wash-off type toilet bowl that flushes out filth by the action of running water due to the drop of water in the bowl portion, and is a washing water for washing the toilet bowl main body 2 and the toilet bowl main body 2. It is equipped with a water storage tank 4 for storing water. The toilet bowl body 2 is made of earthenware having a glaze layer formed on its surface, a skirt portion 6 is formed at the lower portion, and a bowl portion 8 is formed at the front of the upper half. Further, a common water passage 10 whose upstream end communicates with the water storage tank 4 is formed in the rear upper portion of the bowl portion 8, and a drainage pipe 12 for discharging filth is further formed in the rear lower portion of the bowl portion 8. Has been done.

The water storage tank 4 described above is a washing water source, and a drain valve 14 is provided in the water storage tank 4 and is opened and closed by an operation lever (not shown). In this embodiment, it can be applied to a direct pressure type flush toilet that does not have a water storage tank 4 and the flush water is directly supplied from the tap water, a flush toilet of a type in which the flush valve is supplied, and the like. it can.

The bowl portion 8 has a bowl-shaped waste receiving surface 16 (details will be described later), a rim portion 18 located at the upper edge, and a recess 20 formed below the waste receiving surface 16 (details will be described later). I have. Here, as shown in FIGS. 2 to 7, the inner peripheral surface 18a of the rim portion 18 has a shape of overhanging inward so that the swirling washing water described later does not jump out to the outside. There is.

A first spout 22 (details will be described later) is formed on the slightly rear side of the central portion on the left side of the inner peripheral surface of the rim portion 18 of the bowl portion 8 when viewed from the front. A second spout 24 (details will be described later) is formed on the right rear side (downstream side). The first spout 22 and the second spout 24 swivel in the same direction (counterclockwise in FIG. 1) to form a swirling flow described later.

Further, the common waterway 10 formed in the upper rear part of the above-mentioned flush toilet bowl 1 is branched into a first waterway 26 and a second waterway 28 toward the front of the toilet bowl. The first water passage 26 is for supplying wash water to the first water spout 22, and the second water passage 28 is for supplying wash water to the second water spout 24.
In the flush toilet bowl 1 of the present embodiment, the first water passage 26 including the first spout 22 and the second water passage 28 including the second spout 24 are integrated with the pottery body 2 made of earthenware. The formed form will be described, but the form is not limited to this, and the first water passage including the first spout and the second water channel including the second spout are separate from the toilet bowl body. It may be formed by a distributor or the like.

Here, as shown in FIGS. 2 to 7, the filth receiving surface 16 of the bowl portion 8 of the flush toilet bowl 1 according to the present embodiment is the entire area along the radial line toward the entrance of the drainage pipe line 12. In, it is formed in a convex shape upward.

Further, as shown in FIGS. 2 and 3, a headrace 30 for guiding the washing water is formed in the lower region of the inner peripheral surface 18a of the rim portion 18 of the bowl portion 8. The headrace 30 is for swirling the washing water discharged from the first spout 22 along the inner peripheral surface 18a of the rim portion 18, and is from the first spout 22 to the front end of the bowl portion 8. It gradually inclines downward (see FIG. 2), and gradually inclines upward from the front end toward the rear (see FIG. 3). Since the wash water discharged from the first spout 22 swirls along the headrace 30, it flows from the front side of the bowl portion 8 to be described later toward the inlet 32a of the headrace 32 of the drainage pipe 12. The mainstream M of the flow rate (details will be described later) can be formed.

Next, as shown in FIGS. 2 and 3, the drainage pipe 12 is connected to the bottom surface of the recess 20 and extends rearward and downward, and a drainage trap connected to the introduction pipe 32 and extending upward. It is provided with a pipeline 34. Further, the drain trap pipeline 34 is composed of an ascending pipeline 34a and a descending pipeline 34b.
The water guide line 32 is connected to the bottom surface of the recess 20 as a smooth continuous curved surface, so that the washing water flowing from the recess 20 into the introduction line 32 smoothly flows in the introduction line 32.

Next, the filth receiving surface 16 and the recess 20 in the bowl portion 8 will be described in detail with reference to FIGS. 1 to 7 and 9 to 11.
9 is a cross-sectional view taken along the line IX-IX of FIG. 1, FIG. 10 is a cross-sectional view taken along the line XX of FIG. 1, and FIG. 11 is shown in FIG. FIG. 5 is a partially enlarged plan view of a bowl portion of a toilet bowl body of a flush toilet according to an embodiment of the present invention.

First, as shown in FIGS. 1 to 7 and 9 to 11, the filth receiving surface 16 is formed from the vicinity of the central portion C1 of the rear filth receiving surface 16a to the front end of the front filth receiving surface 16b of the bowl portion 6. It is formed so as to gradually incline downward toward the front end and gradually inward upward from the front end toward the rear side.
Further, as shown in FIGS. 2 and 7, the rear side sewage receiving surface 16a is formed in a shelf shape in the rear side region of the sewage receiving surface 16 in the vicinity of the downstream side of the second spout 24. As a result, as shown in FIG. 11, most of the flow m of the washing water discharged from the second spout 24 to the vicinity of the central portion C1 of the rear sewage receiving surface 16a is directed to the rear sewage receiving surface 16a. Along the way, it bypasses the rear side of the recess 20 and turns to the side of the recess 20 (the left side when the recess 20 is viewed from the front side) to form a lateral flow toward the inside of the recess 20. ..
The amount of wash water in the flow m of the water discharged from the second spout 24 is set to be smaller than the amount of wash water in the large flow rate mainstream M discharged from the first spout 22. For example, 60% to 90% of the amount of wash water that has passed through the common water passage 10 is discharged from the first spout 22 via the first water channel 26, and 10% to 40% of the amount of wash water that has passed through the common water channel 10 is discharged. Water is discharged from the second spout 24 via the second water passage 28.
Further, it is preferable that the amount of washing water in most of the flow m of the water discharged from the second spout 24 is set to be approximately 50% or more of the total amount of washing discharged from the second spout 24.
Further, for a part m1 of the mainstream m of the washing water discharged from the second spout 24, in addition to the washing water discharged from the first spout 22 and flowing into the recess 20 from the front side as a large flow rate mainstream M. Therefore, it can flow into the recess 20 together with the mainstream M from the front side.

Next, as shown in FIGS. 2, 3 and 11, the recess 20 of the bowl portion 8 includes a bottom surface 36 located below the accumulated water level W, and a bottom surface 36 and a lower edge portion of the filth receiving surface 16. It is provided with a wall surface 38 for connecting the above. Further, the bottom surface 36 includes a front bottom surface 40 formed in a region (front region) on the front side from the inlet 32a of the headrace pipe 32, and a rear bottom surface formed in a region on the rear side from the inlet 32a of the headrace pipe 32. It is equipped with 42.

The front bottom surface 40 of the bottom portion 36 of the recess 20 is formed horizontally. The front bottom surface 40 may be inclined downward toward the rear.
Further, the front bottom surface 40 of the recess 20 is formed so that the entire region of this surface is located below the accumulated water level W and above the lower end 42a of the rear bottom surface 42.

The posterior bottom surface 42 of the bottom portion 36 of the recess 20 is formed so as to be directed toward the front region of the introduction pipe 32 and to be inclined downward toward the inside. Further, the rear bottom surface 42 of the recess 20 is formed so that the entire region of this surface is located below the accumulated water level W. The rear bottom surface 42 of the recess 20 does not have to be a flat surface, and may be formed by a curved surface that is slightly curved upward.

Next, the area A1 of the front bottom surface 40 is set to be larger than half of the area A2 of the pool surface S in the plan view shown in FIG. As a result, as shown in FIG. 11, most of the flow m of the washing water discharged from the second spout 24 to the vicinity of the central portion C1 of the rear sewage receiving surface 16a is directed to the rear sewage receiving surface 16a. Along the way, it bypasses the rear side of the recess 20 and turns to the side of the recess 20 (the left side when the recess 20 is viewed from the front side) to form a lateral flow toward the inside of the recess 20. .. Then, the lateral flow m of the washing water sneaks into the front bottom surface 40 along the left side wall surface 38a from the vicinity above the left side wall surface 38a of the recess 20.
Further, the flow m of the washing water that has slipped into the recess 20 swirls upward from the front bottom surface 40 of the recess 20 along the right side wall surface 38b to form a flow that effectively agitates the accumulated water in the vertical direction. It has become. Then, this flow m joins the large flow rate mainstream M which is discharged from the first spout 22 and flows into the recess 20 from the front side.
In the present embodiment, the area A1 of the front bottom surface 40 is set to be larger than half of the area A2 of the pool surface S in the plan view shown in FIG. 11, and the embodiment will be described. It may be equal to half of the area A2 of the pool surface S, and in short, the area A1 of the front bottom surface 40 may be set to half or more of the area A2 of the pool surface S.

Next, the first spout 22 and the second spout 24 in the bowl portion 8 will be described in detail with reference to FIGS. 11 to 13.
FIG. 12 is a cross-sectional view of the first spout of the flush toilet according to the embodiment of the present invention, and FIG. 13 is a cross-sectional view of the second spout of the flush toilet according to the embodiment of the present invention.
First, as shown in FIG. 12, the opening cross section D1 of the first spout 22 and the flow path cross section of the first water passage 26 leading to the opening cross section D1 of the first spout 22 are substantially the same as those of the first water passage 26. It is formed in a vertically long flat shape over the entire area. As a result, most of the washing water that has passed through the first water passage 26 and is discharged from the first spout 22 does not fall on the front filth receiving surface 16b immediately after the spout, and at least reaches the front end in the bowl portion 8. The bowl portion 8 can be swiveled, and the mainstream M flowing into the recess 20 from the front side in the bowl portion 8 can be effectively formed.
The ratio (h1 / w1) of the maximum vertical dimension h1 and the maximum width dimension w1 in the opening cross section D1 of the first spout 22 is preferably set to 1 to 5, and 1.5 to 3 It is more preferable that it is set to.

Further, as shown in FIG. 13, the opening cross section D2 of the second spout 24 is smaller than the opening cross section D1 of the first spout 22, but is the same as the opening cross section D1 of the first spout 22. In addition, it is formed in a vertically long flat shape. As a result, most of the washing water that has passed through the second water passage 28 and is discharged from the second spout 24 is also rearward in the recess 20 from the rear side filth receiving surface 16a immediately after the second spout 24 is discharged. It is possible to turn to the vicinity of the upper side of the left side wall surface 38a of the recess 20 without falling into the region.
The ratio (h2 / w2) of the maximum vertical dimension h2 and the maximum width dimension w2 in the opening cross section D2 of the second spout 24 is preferably set to 1 to 5, and 1.5 to 3 It is more preferable that it is set to.

Next, as shown in FIGS. 2, 3, 11 and 13, the width L in the front-rear direction and the maximum of the second spout 24 at the central portion C1 of the rear side filth receiving surface 16a formed in a shelf shape. The ratio L / w2 to the width dimension w2 is preferably set to 2 to 10, more preferably set to 3 to 9, and most preferably set to 4 to 8. As a result, as shown in FIG. 11, most of the flow m of the washing water discharged from the second spout 24 to the vicinity of the central portion C1 of the rear sewage receiving surface 16a is directed to the rear sewage receiving surface 16a. Along, bypassing the rear side of the recess 20 and turning to the side of the recess 20 (the left side when the recess 20 is viewed from the front side), forming a lateral flow toward the inside of the recess 20 and in front of the recess 20. Since it is guided to the side region, the main stream m of the washing water from the second spout 24 can be reliably merged with the main stream M from the first spout 22 from the lateral direction, and the recessed portion. The accumulated water in 20 can be effectively agitated in the vertical direction.

Next, the washing operation in the flush toilet according to the present embodiment will be described with reference to FIGS. 1 to 16.
14 is a plan view showing the flow of washing water of the flush toilet according to the embodiment of the present invention, FIG. 15 is a cross-sectional view of FIG. 14, and FIG. 16 is a cross-sectional view of the flush toilet according to the embodiment of the present invention. It is a schematic perspective view which shows the state of the flow of wash water.

First, when the user operates the operation lever (not shown) of the water storage tank 4, the drain valve 14 opens, the washing water in the water storage tank 4 flows into the common water passage 10, and branches from the common water passage 10. Washing water is discharged from each of the first spout 22 and the second spout 24 via the first spout 26 and the second spout 28.

The wash water discharged from the first spout 22 first flows forward along the headrace 30 formed on the inner peripheral surface 18a of the rim portion 18 of the bowl portion 8, and then flows forward to the front end of the bowl portion 8. After passing through, it flows backward. At this time, a part of the washing water drops the bowl portion 8 while swirling, and cleans the filth receiving surface 16.

Further, a considerable amount of washing water discharged from the first spout 22 and flowing along the headrace 30 is a large flow rate flowing from the front side of the bowl portion 8 toward the inlet 32a of the headrace 32 of the drainage pipe 12. It forms the mainstream M (see FIGS. 14 and 16). A part of the flow M1 of the main stream M collides with the rear bottom surface 42 of the bottom surface 36 of the recess 20, and then flows out diagonally downward and forward toward the front region in the headrace line 32 (see FIG. 15). Further, the other part of the mainstream M, the flow M2, directly flows into the inlet 32a of the headrace 32 (see FIG. 15).

Here, in the present embodiment, a headrace 30 is formed for the wash water to swirl along the inner peripheral surface 18a of the rim portion 18, and the headrace 30 is from the first spout 22 to the front of the bowl portion 8. Since it is formed so as to gradually incline downward toward the end and gradually incline upward from the front end toward the rear side, a large flow rate mainstream M can be formed. Further, a part M1 of the mainstream M collides with the rear bottom surface 42 of the bottom surface 36 of the recess 20, and a part M1 of the collided mainstream flows toward the front region in the headrace line 32. In particular, since the posterior bottom surface 42 of the bottom surface 36 is formed so as to incline downward toward the inside, a part of the mainstream flow M1 that collides with the posterior bottom surface 42 is passed through the front region of the headrace 32. Can be guided smoothly toward. Further, a part of the main stream M2 of the washing water flows into the rear region in the headrace line 32.

On the other hand, the washing water discharged from the second spout 24 drops the bowl portion 8 while swirling, and cleans the rear region of the filth receiving surface 16. Further, as shown in FIGS. 14 to 16, most of the flow m of the washing water discharged from the second spout 24 to the vicinity of the central portion C1 of the rear sewage receiving surface 16a is along the rear sewage receiving surface 16a. It bypasses the rear side of the recess 20 and turns to the side of the recess 20 (the left side when the recess 20 is viewed from the front side) to form a lateral flow toward the inside of the recess 20.

Further, as shown in FIG. 14, a part m1 of the mainstream m of the washing water discharged from the second spout 24 is from the first spout 22 which flows into the recess 20 as the mainstream M from the front side of the bowl portion 8. It merges with the washing water of No. 1 and flows into the recess 20 from the front side together with the main stream M.

Further, the lateral flow m of the washing water flowing into the recess 20 sneaks into the front bottom surface 40 along the left wall 38a from the vicinity above the left wall 38a of the recess 20. The flow m of the washing water that has slipped into the recess 20 swirls upward from the front bottom surface 40 of the recess 20 along the right side wall surface 38b to form a flow that effectively agitates the accumulated water in the vertical direction. ing. Then, the flow m of the washing water from the second spout 24 joins the large flow rate mainstream M that is spouted from the first spout 22 and flows into the recess 20 from the front side. At this time, the flow m of the washing water discharged from the second spout 24 collides with the front bottom surface 40 and rises, and is mixed with the main streams M1 and M2 flowing above the flow m. As a result, the filth is effectively agitated and smoothly flows into the headrace 32.

According to the flush toilet bowl 1 according to the embodiment of the present invention described above, the wash water discharged from the first spout 22 flows into the recess 20 as the mainstream M from the front side of the bowl portion 8 and flows into the recess 20. Since most of the washing water discharged from the second spout 24 joins the mainstream M from the lateral direction of the recess 20 as the main stream m, the accumulated water in the recess 20 is effectively agitated in the vertical direction. Can be done. Therefore, the filth receiving surface 16 of the bowl portion 8 can be sufficiently washed with the washing water spouted from each of the first spout 22 and the second spout 24, and the flow of stirring in the vertical direction in the recess 20. m can be generated. As a result, the floating filth in the bowl portion 8 can be submerged in the reservoir water and efficiently discharged into the drainage pipe, and the filth discharge performance can be improved.

Further, according to the flush toilet bowl 1 according to the present embodiment, the sewage receiving surface 16 of the bowl portion 8 is provided with a rear sewage receiving surface formed in a shelf shape in the rear side region near the downstream of the second spout 24. Since the ratio L / w2 of the width L of the rear side filth receiving surface 16a formed in the shape of a shelf to the maximum width dimension w2 of the second spout 24 is 2 to 10, the second spout The washing water discharged from the water port 24 is guided to the front side region of the recess 20 by flowing through the rear side waste receiving surface 16a. Therefore, the washing water from the second spout 24 can be reliably merged with the mainstream M from the first spout 22 from the lateral direction of the recess 20, and the accumulated water in the recess 20 is effective in the vertical direction. Can be agitated. Therefore, the filth receiving surface 16 of the bowl portion 8 can be sufficiently washed with the washing water spouted from each of the first spout 22 and the second spout 24, and the flow of stirring in the vertical direction in the recess 20. m can be generated. As a result, the floating filth in the bowl portion 8 can be submerged in the reservoir water and efficiently discharged into the drainage pipe line 12, and the filth discharge performance can be improved.

Further, according to the flush toilet bowl 1 according to the present embodiment, the area A1 of the front bottom surface 40 formed in the front region of the recess 20 in a plan view is set to be more than half of the area A2 of the pool surface. The mainstream m of the washing water discharged from the second spout 24 is effective in flowing from the left side wall surface 38a of the recess 20 into the front bottom surface 40 and stirring the accumulated water in the vertical direction along the right side wall surface 38b of the recess 20. Can be formed into. Therefore, the entire filth receiving surface 16 of the bowl portion 8 can be sufficiently washed with the washing water spouted from each of the first spout 22 and the second spout 24, and is stirred in the vertical direction in the recess 20. It is possible to generate a flow m. As a result, the floating filth in the bowl portion 8 can be submerged in the reservoir water and efficiently discharged into the drainage pipe line 12, and the filth discharge performance can be improved.

Further, according to the water-washing toilet bowl 1 according to the present embodiment, the headrace 30 for turning the mainstream M of the washing water discharged from the first spout 22 along the inner peripheral surface 18a of the rim portion 18 is a bowl portion. 8 is formed, and the headrace 30 gradually inclines downward from the first spout 22 toward the front end of the bowl portion 8, and gradually inclines upward from the front end toward the rear side. By being formed, the washing water from the first spout 22 can be effectively flowed into the recess 20 from the front side of the bowl portion 8 as the mainstream M.

Further, according to the flush toilet bowl 1 according to the present embodiment, as shown in FIGS. 9 and 10, the filth receiving surface 16 is located at the front end of the bowl portion 8 from the vicinity of the central portion C1 of the rear filth receiving surface 16a. Water is discharged from the first spout 22 and recessed from the front side of the bowl portion 8 by being formed so as to gradually incline downward and gradually incline upward from the front end toward the rear side. In addition to the washing water flowing into the mainstream M as the mainstream M, a part m1 of the mainstream m of the washing water discharged from the second spout 24 can also flow into the recess 20 from the front side.

Further, according to the flush toilet bowl 1 according to the present embodiment, the opening cross section D1 of the first spout 22 is formed in a vertically long flat shape, so that the wash water discharged from the first spout 22 is filth. It can swivel to the front end of the bowl portion 8 without falling on the receiving surface 16, and the mainstream M flowing into the recess 20 from the front side can be effectively formed.

In the flush toilet 1 according to the present embodiment described above, a wash-off type flush toilet has been described as an example, but the siphon action is used to suck in the filth in the bowl portion and to the outside at once from the drain trap pipeline. It may be a so-called siphon-type flush toilet that discharges water to the toilet.

1 Washing toilet bowl 2 Toilet bowl body 4 Water storage tank 6 Toilet bowl body skirt part 8 Toilet bowl body bowl part 10 Common water passage 12 Drainage pipe 14 Drain valve 16 Waste receiving surface 16a Rear side filth receiving surface 16b Front side filth receiving surface 18 Rim part 18a Inner peripheral surface 20 Recessed 22 First spout (1st rim spout)
24 2nd spout (2nd rim spout)
26 1st waterway 28 2nd waterway 30 Waterway 32 Waterway 32a Inlet 34 Drain trap line 34a Ascending line 34b Downing line 36 Bottom 38 Wall 38a Left side wall 38b Right side wall 40 Front bottom 42 Rear bottom 42a Lower end A1 Area of the front bottom surface of the recess A2 Area of the pool surface C Central part of the rear side filth receiving surface D1 Opening section of the first spout D2 Opening section of the second spout h1 Maximum length of the opening section of the first spout Dimension h2 Maximum vertical dimension of the opening cross section of the second spout L L Width of the central part of the rear side filth receiving surface in the front-rear direction M Mainstream of wash water spouted from the first spout M1 Water spouted from the first spout Part of the mainstream of wash water M2 Other part of the mainstream of wash water spouted from the first spout m Mainstream of wash water spouted from the second spout m1 Wash water spouted from the second spout Part of the mainstream S Reservoir surface W Reservoir level w1 Maximum width dimension of the opening cross section of the first spout w2 Maximum width dimension of the opening cross section of the second spout (width of the second rim spout)

Claims (7)

A flush toilet that cleans the toilet with the wash water supplied from the water supply source and discharges filth.
It is provided with a bowl-shaped filth receiving surface, a rim portion located above the filth receiving surface, and a recess formed below the filth receiving surface, and the recess is a bottom surface located below the accumulated water level. A bowl portion provided with a wall surface connecting the bottom surface and the lower edge portion of the waste receiving surface.
A water discharge part that supplies wash water into the bowl part.
A first rim spouting portion located on one side of the bowl portion in the left-right direction and discharging washing water toward the front of the bowl portion.
A second rim spouting portion located on the other side of the bowl portion in the left-right direction and discharging wash water toward the one side of the bowl portion, and a water spouting portion having only a second rim spouting portion.
It has a drainage pipe whose entrance is connected to the recess and discharges filth.
The bowl portion is configured so that the washing water discharged from the first rim water discharge portion flows into the recess from the front side of the bowl portion, and is discharged from the second rim water discharge portion. 2 mainstream from the rim water spouting portion of the washing water has started flowing down by the waste receiving surface inclined downward in the rear of the recess with flowing sideways towards the rear of the waste receiving surface of the recess, the recess It is configured to flow into the concave portion before turning to the front filth receiving surface, join the main stream from the first rim water discharge portion in the concave portion, and submerge the filth in the bowl portion in the pooled water. A flush toilet that features that. The sewage receiving surface of the bowl portion includes a rear side sewage receiving surface formed in a shelf shape in the rear side region in the vicinity of the downstream side of the second rim water discharge portion, and the washing water discharged from the second rim water discharge portion is provided. The water-washing toilet according to claim 1, wherein the water-washing toilet bowl is guided to the front side region of the recess by flowing on the rear side filth receiving surface. The water washing according to claim 2, wherein the ratio (L / w2) of the width (L) of the rear side filth receiving surface formed in the shape of a shelf to the width (w2) of the second rim water discharge portion is 2 to 10. toilet bowl. The flush toilet according to claim 2 or 3, wherein the bottom surface of the recess is formed in the front side region in a plan view, and the area of the bottom surface is set to half or more of the area of the water reservoir surface. In the bowl portion, a headrace is formed for the washing water discharged from the first rim spouting portion to swirl along the inner peripheral surface of the rim portion, and this headrace is formed in the first rim spouting portion. The invention according to any one of claims 1 to 4, which is formed so as to gradually incline downward toward the front end of the bowl portion and gradually incline upward from the front end toward the rear side. Washing urinal. The filth receiving surface forms a surface formed so as to gradually incline downward from the vicinity of the central portion of the filth receiving surface on the rear side toward the filth receiving surface in front of the recess and to bypass the recess. The flush toilet according to claim 5. The flush toilet according to any one of claims 1 to 6, wherein the opening of the first rim water discharge portion is formed in a vertically long flat shape.

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