JP6573065B2 - Flush toilet - Google Patents

Description

  The present invention relates to a flush toilet, and more particularly, to a flush toilet with improved discharge efficiency by efficiently discharging floating filth in a bowl portion.

  Conventionally, for example, as described in Patent Document 1, the wash water discharged from the rim spout flows along the shelf, and the filth receiving surface of the bowl portion is washed while turning to clean the bowl portion. There is known a flush toilet in which wash water flowing into the bottom and discharged from the jet outlet of the zette flows down to the bottom of the bowl portion and stirs up and down the accumulated water in the bowl portion.

  On the other hand, for example, as described in Patent Document 2, wash water is discharged from only the two rim water discharge ports of the rim, the first water discharge port and the second water discharge port, and the swirl flows on the filth receiving surface of the bowl portion. Also known are flush toilets supplied in the form of In this flush toilet, the swirling wash water that flows out from the first water outlet of the rim turns into a bundle-like flow toward the reservoir portion by the guide surface provided in the rear region of the bowl portion, and flows into the drainage channel. , Siphon action is generated and filth is discharged.

Japanese Patent No. 3975486 JP 2014-37723 A

  However, the flush toilet of Patent Document 1 described above has a jet outlet for stirring up and down the stored water, so that it is excellent for discharging floating filth, but the filth receiving surface is washed. Since there is little water discharged from the water discharge port of a rim | limb, there exists a problem that washing | cleaning sufficient to wash | clean a dirt receiving surface cannot be performed.

  Moreover, in the flush toilet bowl of patent document 2 mentioned above, sufficient washing | cleaning of a filth receiving surface can be performed with the wash water discharged from two rim water discharge ports, the 1st water discharge port of a rim, and a 2nd water discharge port. However, since the bundle-like flow formed by the guide surface flows into the reservoir, it collides with the vertical wall, changes its direction, and flows into the drainage channel as it is, so that the floating filth can be discharged well. There is a problem that it remains without being able to.

  Therefore, how to stir the accumulated water up and down in a flush toilet that is discharged only from the water outlet of the rim is also a problem to be solved. Furthermore, it is an important problem to be solved about how quickly the stirring of the upper and lower water is generated.

  Therefore, the present invention has been made to solve the problems of the prior art, and the floating filth in the bowl portion can be efficiently discharged into the drain pipe by stirring vertically in the stored water. An object of the present invention is to provide a flush toilet that can improve the waste discharging performance.

In order to achieve the above-described object, the present invention is a flush toilet for cleaning toilet bowls with washing water supplied from a water supply source to discharge waste, and is located at a bowl-shaped waste receiving surface and an upper edge. A rim portion, and a recess formed below the filth receiving surface, and a bottom surface where the recess is located below the level of the stored water, and a wall surface connecting the bottom surface and the lower edge of the filth receiving surface. , A first rim water discharger that is located on one side in the left-right direction of the bowl part and that discharges the swirling flow turning along the inner peripheral surface of the rim part toward the front, with located behind the right and left direction of the other side, a second rim spouting unit for spouting toward the swirling flow swirling in the swirling flow in the same direction by the first rim spouting portion along the inner peripheral surface of the rim portion to the rear A drainage pipe having an inlet connected to the recess and discharging waste. The bowl portion forms a main flow in which the wash water discharged from the first rim water discharge portion flows into the recess from the front side of the bowl portion, and the wash water discharged from the second rim water discharge portion accumulates in the recess. It is configured to form a flow for stirring water in the vertical direction, and in the rear side region of the bowl portion, the flow of cleaning water discharged from the second rim water discharge portion and swirling the bowl portion is directed toward the bottom surface of the recess. is the rear side recesses form to, waste receiving surface of the bowl portion is provided with a front waste receiving surface and the rear-side waste receiving surface, the rear-side recess is formed in the rear side waste receiving surface, the rear-side recess , Extending from the rear side toward the recessed portion on the rear side waste receiving surface, extending in both the left and right directions along the wall surface on the rear side of the recessed portion, and extending toward the recessed portion along the central axis extending in the front-rear direction of the bowl portion At the center of the width direction of the rim Depth from the surface is maximized.
In the present invention configured as described above, the bowl portion forms a main flow in which the wash water discharged from the first rim water discharge portion flows into the recess from the front side of the bowl portion, and from the second rim water discharge portion. The discharged wash water is configured to form a flow that stirs the accumulated water in the concave portion in the vertical direction. Further, in the rear side region of the bowl portion, water is discharged from the second rim water discharge portion and swivels the bowl portion. Since the rear-side recess is formed so that the flow of the cleaning water flows toward the bottom surface of the recess, the cleaning water discharged from the second rim spouting port is quickly guided to the bottom surface of the recess by the rear-side recess. , Flows upward from the bottom of the recess, and then flows downward. As a result, according to the present invention, it is possible to form a flow in which the stored water is stirred up and down at an early stage, and it is possible to sink the floating filth in the stored water and efficiently discharge it into the drainage pipe. , Filth discharge performance can be improved. Moreover, 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. Therefore, according to the present invention, it is possible to achieve both cleaning of the bowl surface and improvement of the waste discharge performance. Further, according to the present invention, since the rear concave portion is formed in the rear filth receiving surface, the swirl flow that swirls the rear filth receiving surface discharged from the second rim water spouting portion is early caused by the rear concave portion. To the bottom of the recess. Further, according to the present invention, the rear concave portion extends from the rear side toward the concave portion on the rear side waste receiving surface and extends in both the left and right directions along the wall surface on the rear side of the concave portion. Without forming the region of the washing part, the swirl flow swirling on the rear filth receiving surface discharged from the second rim water discharging part can be guided to the bottom surface of the recessed part at an early stage. Furthermore, according to the present invention, the rear side recess extends toward the recess along the central axis extending in the front-rear direction of the bowl portion, and the depth from the upper surface of the rim portion is maximized at the center in the width direction. By the rear side concave portion, the swirling flow swirling the rear side filth receiving surface discharged from the second rim water discharging portion can be converted into a downward flow at an early stage and smoothly guided to the bottom surface of the concave portion.

In the present invention, preferably, the side surface of the rear concave portion is continuously formed on the same plane as the wall surface of the concave portion.
In the present invention configured as described above, the side surface of the rear concave portion is formed substantially continuously with the wall surface of the concave portion, so that water is discharged from the second rim water discharge portion by the rear concave portion. The swirl flow swirling on the rear-side filth receiving surface can be converted into a downward flow at an early stage, and smoothly led to the bottom surface of the recessed portion in the stored water.

In the present invention, preferably, a region in front of the first rim water spouting portion along the turning direction of the first rim water spouting portion on the inner peripheral surface of the rim portion where the cleaning water spouted from the second rim water spouting portion swirls is preferably further provided. The 1st guidance part is formed in.
In this invention comprised in this way, before the 1st rim water discharging part along the turning direction of the 1st rim water discharging part of the internal peripheral surface of the rim part in which the washing water discharged from the 2nd rim water discharging part turns since the first guiding portion in the region is formed, from the first guide portion can be guided to the bottom surface of the early recess a swirling flow swirling water discharge by the rim inner peripheral surface of the second rim spouting portion .

In the present invention, preferably, the height of the overhanging portion of the inner peripheral surface of the rim portion of the first guide portion is formed so as to gradually decrease toward the downstream side in the turning direction.
In the present invention configured as described above, the height of the overhanging portion of the inner peripheral surface of the rim portion of the first guide portion is formed so as to gradually decrease toward the downstream side in the turning direction. Therefore, most of the swirl flow swirling on the inner peripheral surface of the rim portion discharged from the second rim water discharge portion by the first guide portion can be surely guided to the bottom surface of the recess at an early stage.

In the present invention, preferably, the bottom surface of the recess is formed such that a lateral region thereof extends rearward from the front-rear direction center of the recess in plan view.
In the present invention configured as described above, the bottom surface of the recess is formed so that the lateral region thereof extends rearward from the front-rear direction center of the recess in plan view. It can be reliably received on the bottom surface of the recess to form a vertical stirring flow.

  According to the flush toilet of the present invention, the floating filth in the bowl portion can be stirred up and down in the stored water and efficiently discharged into the drain pipe, and the filth discharge performance can be improved.

It is a top view which shows the flush toilet bowl by embodiment of this invention. It is sectional drawing seen along the AA line of FIG. It is sectional drawing seen along the BB line of FIG. It is sectional drawing seen along CC line of FIG. It is sectional drawing seen along the DD line | wire of FIG. It is sectional drawing seen along the EE line of FIG. It is sectional drawing seen along the FF line of FIG. It is each sectional drawing seen along the aa line of FIG. 1, bb line, cc line, dd line, ee line, ff line, and gg line. FIG. 2 is a schematic plan view similar to FIG. 1. It is a diagram which shows the curvature radius in the back side recessed part of the bowl part of the flush toilet bowl by embodiment of this invention. It is a diagram which shows the distance from the rim | limb top surface of the back side recessed part of the flush toilet bowl by embodiment of this invention. It is a partial front view which shows the rim | limb part vicinity of the 1st spout of the flush toilet bowl by embodiment of this invention. It is each sectional drawing seen along the II line of FIG. 12, an aa line, and a bb line. It is a partial front view which shows the rim | limb part vicinity of the 2nd water discharge port of the flush toilet bowl by embodiment of this invention. It is each sectional drawing seen along the JJ line | wire, KK line | wire, LL line | wire, and MM line | wire of FIG. It is a schematic plan view which shows the mode of the flow of the washing water of the flush toilet bowl by embodiment of this invention. It is a schematic sectional drawing which shows the mode of the flow of the washing water of the flush toilet bowl by embodiment of this invention.

Next, a flush toilet according to an embodiment of the present invention will be described with reference to FIGS.
First, the basic structure of a flush toilet according to an embodiment of the present invention will be described with reference to FIGS. 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 line AA in FIG. 1, and FIG. 3 is taken along line BB in FIG. 4 is a cross-sectional view taken along line CC of FIG. 1, FIG. 5 is a cross-sectional view taken along line DD of FIG. 1, and FIG. FIG. 7 is a cross-sectional view taken along line E-E in FIG. 1, and FIG. 7 is a cross-sectional view taken along line F-F in FIG.

  As shown in FIGS. 1 and 2, a flush toilet 1 is a flush toilet that flushes filth by flowing water caused by a drop of water in a bowl portion, and includes a toilet body 2, which includes a flush water source. Wash water is introduced through a water storage tank (not shown) provided with a jet pump mechanism. The toilet body 2 is made of earthenware with a glaze layer formed on the surface, a skirt portion 6 is formed in the lower portion, and a bowl portion 8 is formed in the front of the upper half. In addition, a common water passage 10 connected to a drain port of a water storage tank provided with a jet pump mechanism is formed in the upper rear portion of the bowl portion 8, and drainage for discharging filth in the lower rear portion of the bowl portion 8. A conduit 12 is formed.

  The present invention can be applied not only to a flush toilet using a jet pump mechanism, but also to a flush toilet that supplies wash water by a normal water storage tank 4, a direct-pressure flush toilet that is directly supplied with wash water, and the like. .

  The bowl portion 8 includes a bowl-shaped filth receiving surface 16, a rim portion 18 located at the upper edge, and a recess 20 formed below the filth receiving surface 16. Here, as shown in FIGS. 2 to 7, the inner peripheral surface 18 a of the rim portion 18 has an overhanging shape toward the inside, so that the swirling cleaning water described later does not jump out. ing.

  A first rim spout 22 for discharging washing water is formed slightly rearward of the central portion on the left side when viewed from the front of the inner peripheral surface of the rim portion 18 of the bowl portion 8. The second rim spout 24 is formed on the side). The first rim water spouting port 22 and the second rim water spouting port 24 form a swirl flow swirling in the same direction (counterclockwise direction in FIG. 1).

Moreover, the common water flow path 10 formed in the rear upper part of the flush toilet 1 mentioned above supplies wash water to the 1st water flow path 26 which supplies a wash water to the 1st rim water discharge port 22, and the 2nd rim water discharge port 24. Branches to the second water passage 28.
In the flush toilet 1 of the present embodiment, the first water passage 26 including the first rim spout 22 and the second water passage 28 including the second rim spout 24 are integrated with the ceramic toilet body 2. However, the present invention is not limited to such a form, and the first water passage including the first rim water outlet and the second water passage including the second rim water outlet are separate from the toilet body. It may be formed by a distributor or the like.

  Here, as shown in FIGS. 2-7, the filth receiving surface 16 of the bowl part 8 of the flush toilet 1 by this embodiment is provided with the front side filth receiving surface 16a and the back side filth receiving surface 16b.

  Further, as shown in FIG. 2, a shelf-shaped water conduit 30 that guides cleaning water is formed in a region below the inner peripheral surface 18 a of the rim portion 18 of the bowl portion 8. The water conduit 30 is also an outer peripheral end region of the filth receiving surface 16. The water guide path 30 is for the cleaning water discharged from the first rim spout 22 to turn along the inner peripheral surface 18 a of the rim portion 18, and from the first rim spout 22 to the front end of the bowl portion 8. It is gradually inclined downward toward the rear and gradually inclined upward from the front end toward the rear side (see FIG. 2). The wash water spouted from the first rim spout 22 has a concave front receiving surface 16a and swirls along the water conduit 30. As will be described later, A main flow M11 (see FIGS. 16 and 17) that flows from the side toward the inlet 32a of the water conduit 32 of the drain pipe 12 is formed.

Next, as shown in FIG. 2, the drainage pipe 12 is connected to the bottom surface 36 of the recess 20 and extends backward and downward, and the drain trap pipe connected to the introduction pipe 32 and extends upward. 34. Further, the drain trap pipe 34 is formed of an ascending pipe 34a and a descending pipe 34b.
The water conduit 32 is connected to the bottom surface 36 of the recess 20 as a smooth continuous curved surface, so that the wash water flowing from the recess 20 into the introduction conduit 32 flows smoothly through the introduction conduit 32. .

  Next, as shown in FIGS. 1 and 2, the concave portion 20 of the bowl portion 8 includes a bottom surface 36 located below the stored water level W, and a bottom edge of the bottom surface 36 and the bottom edge of the filth receiving surface 16. And a wall surface 38 connecting the parts. The bottom surface 36 is formed in a region in front of the inlet 32 a of the introduction pipe line 32, and the side region of the bottom surface 36 is formed to extend from the center in the front-rear direction of the recess 20 to the rear. The side region formed to extend to the rear of the bottom surface 36 is a side (front) where the flow of cleaning water formed by a guide portion (rear side recess 40, first guide path 42) to be described later flows into the recess 20. It may be formed only on one side of the right side region). Furthermore, the bottom 36 of the recess 20 is formed substantially horizontally. The bottom surface 36 may be inclined downward toward the rear. Behind the recess 20, the bottom portion 36 is not formed but a wall surface 38 is formed, and the wall surface 38 is formed so as to be continuous with the inlet 32 a of the introduction pipe line 32.

  Next, the shape of the rear filth receiving surface 16b of the filth receiving surface 16 of the bowl portion 8 will be described with reference to FIGS. 1, 7, and 8 to 11. FIG. 8 is a cross-sectional view taken along the lines aa, bb, cc, dd, ee, ff, and gg in FIG. FIG. 9 is a schematic plan view similar to FIG. 1, FIG. 10 is a diagram showing the radius of curvature in the rear recess of the bowl portion of the flush toilet according to the embodiment of the present invention, and FIG. It is a diagram which shows the distance from the rim | limb upper surface of the back side recessed part of the flush toilet bowl by a form.

  First, as shown in FIG.1 and FIG.9, the back side recessed part 40 which is the 1st example of the guidance | induction part of this invention is in the area | region of the back side of the recessed part 20 of the back side filth receiving surface 16b of the filth receiving surface 16. FIG. Is formed. The rear recess 40 is formed to extend forward from the rear toward the recess 20 along a central axis CL extending in the front-rear direction of the toilet body 2. Further, the side surfaces 40 a and 40 b of the rear recess 40 are formed continuously on the same surface as the wall surface 38 of the recess 20. Note that the rear-side recess 40 does not need to be formed symmetrically in the left-right direction, and may be formed asymmetrically.

    More specifically, the rear recess 40 is formed with a radius of curvature R shown in FIG. 10 at each position shown in A to M shown in FIG. 9, and further from the upper surface of the rim portion 12 shown in FIG. It is formed to have a distance (depth) H.

  As shown in FIGS. 9 to 11, the rear concave portion 40 of the rear filth receiving surface 16 b has the largest radius of curvature R at the G position, which is the position of the center line CL extending in the front-rear direction of the toilet body 2 (R = 100 mm), and the radius of curvature R is minimum (R = 30 mm) at the A and M positions, which are the front areas of the rear-side dirt receiving surface 16b. For this reason, the distance (depth) H from the upper surface of the rim portion 18 of the rear recess 40 is maximum at the G position (H = 120 mm) and minimum at the A position and M position (H = 80 mm).

  For this reason, as shown in FIG. 8, the rear concave portion 40 has the maximum radius of curvature (R = 100 mm) at the center G position, and therefore the distance (depth) from the upper surface of the rim portion 18 at that position. H) H is the maximum, and the amount of dent is the largest at the center G position.

  In addition, in the conventional flush toilet, such a rear side recess 40 is not formed on the rear side filth receiving surface 16b. Therefore, as shown in FIG. 10 and FIG. The curvature radius of the rear side dirt receiving surface 16b is substantially the same, and the distance (depth) from the upper surface of the rim portion is also substantially the same.

  Next, the shape of the inner peripheral surface 18a of the rim portion 18 in the front area along the turning direction of the first rim water spouting port 22 will be described with reference to FIGS. 12 is a partial front view showing a rim portion in the vicinity of the first water discharge port of the flush toilet according to the embodiment of the present invention, and FIG. 13 is taken along lines II, aa, and bb in FIG. It is each sectional drawing seen.

  A first guide path 42 as a second example of the guide portion of the present invention is formed on the inner peripheral surface 18a of the rim portion 18 in a region in front of the first rim spout 22. As shown in FIG. 12, the height h of the overhang-shaped portion of the inner peripheral surface 18 a decreases as the first guide path 42 approaches the first rim spout 22 along the turning direction F. It is the area | region formed in this. In the first guide portion 42, the lower surface forms the water conduit 30 and has substantially the same height, and the overhang-shaped portion that is the upper surface is formed so as to be gradually lowered.

  Next, the shape of the inner peripheral surface 18a of the rim portion 18 in the region in front of the second rim spout 24 will be described with reference to FIGS. FIG. 14 is a partial front view showing a rim portion near the second rim spout of the flush toilet according to the embodiment of the present invention, and FIG. 15 is a JJ line, a KK line, an LL line in FIG. It is each sectional drawing seen along the MM line.

  On the inner peripheral surface 18a of the rim portion 18 in a region in front of the second rim water spouting port 24, a second guide path 44 having a structure substantially similar to the first guide path 42 described above is formed. As shown in FIG. 14, the height h of the overhang-shaped portion of the inner peripheral surface 18 a becomes lower as the second guide path 44 approaches the second rim spout 24 along the turning direction F. It is the area | region formed in this. In the second guide portion 44, the lower surface forms the water conduit 30 and has the same height and is formed so that the overhang-shaped portion that is the upper surface gradually decreases.

  Next, with reference mainly to FIG.16 and FIG.17, the washing | cleaning operation | movement in the flush toilet bowl 1 by this embodiment is demonstrated. FIG. 16 is a schematic plan view showing the flow of flush water in the flush toilet according to the embodiment of the present invention, and FIG. 17 is a schematic sectional view showing the flow of flush water in the flush toilet according to the embodiment of the present invention. It is.

  First, when a user turns on an operation switch (not shown), a drainage port (not shown) of a water storage tank equipped with a jet pump mechanism is opened, and washing water enters the common water passage 10 of the toilet body 2. The water flows into the first rim water outlet 22 and the second rim water outlet 24 through the first water passage 26 and the second water passage 28 branched from the common water passage 10.

  The wash water discharged from the first rim water discharge port 22 first flows forward along the water guide path 30 formed on the inner peripheral surface 18 a of the rim portion 18 of the bowl portion 8, and the front of the bowl portion 8. After passing through the edge, it flows backward. At this time, a part of the washing water falls down the bowl portion 8 while swirling, and the filth receiving surface 16 is washed. Further, washing water is also discharged from the second rim water discharge port 24, and a part of the water falls while dropping the bowl portion 8 to wash the filth receiving surface 16.

  Further, in the present embodiment, a water conduit 30 is formed for the cleaning water to swirl along the inner peripheral surface 18 a of the rim portion 18, and the water conduit 30 extends from the first rim spout 22 to the front of the bowl portion 8. Since it is formed so as to be gradually inclined downward toward the end and gradually inclined upward from the front end toward the rear side, the water discharged from the first rim spout 22 and flowing along the water conduit 30 A considerable amount of the water M1 forms a main flow M11 having a large flow rate that flows from the front side of the bowl portion 8 toward the inlet 32a of the introduction pipe 32 of the drain pipe 12. Furthermore, a part of the washing water M1 discharged from the first rim water discharge port 22 continues to flow M12 that flows through the water conduit 30 and reaches the second rim water discharge port 24. The flow M12 of the washing water is directed downward by the second guide path 44 in the water guide path 30 before the second rim spout 24 and flows down toward the recess 20.

  Next, the main flow M2 of the wash water discharged from the second rim water discharge port 24 flows through the water conduit 30 of the filth receiving surface 16b on the rear side of the filth receiving surface 16. At this time, when a part of the main flow M <b> 2 passes through the rear recess 40, the flow is directed downward by the rear recess 40 and becomes a flow M <b> 21 flowing down toward the recess 20. Furthermore, a part of the main flow M2 becomes the main flow M22 that flows through the water conduit 30 and reaches the first rim spout 22. The main flow M22 is directed downward by the first guide path 42 in the water guide path 30 before the first rim spout 22 and flows down toward the recess 20 and flows into the recess 20 from the lateral direction.

  As a result, in the flush toilet 1 according to the present embodiment, the wash water M2 (M21, M22) discharged from the second rim spout 24 is formed in the rear recess 40 and the first recess formed in the rear filth receiving surface 16. By passing through the first guide path 42 formed on the inner peripheral surface of the rim portion 18 in the region in front of the rim spout 22, the interior of the recess 20 can be quickly introduced from the back of the recess 20 and the left side. Flow into. Of the washing water M2 (M21, M22) that has flowed into these recesses 20, the flow M21 directed downward by the rear recess 40 sinks into the stored water from the rear side of the recess 20 to the side of the bottom surface 36. After flowing from the region along the front region and colliding with the wall surface of the recess 20, it rises along the wall surface and becomes a swirling flow that swirls in the recess 20 in the vertical direction. In addition, the flow M22 directed downward by the first guide path 42 enters the accumulated water from the side of the concave portion 20, flows along the bottom surface of the concave portion, collides with the wall surface of the concave portion 20, and then the wall surface thereof. And a swirling flow swirling up and down in the recess 20. Thus, the swirl flow swirling in the up-down direction formed by the flow M21 directed downward by the rear recess 40 and the swirl swirling in the vertical direction formed by the flow M22 directed downward by the first guide path 42. Combined with the flow, according to the flush toilet 1 according to the present embodiment, it is possible to form a flow that stirs the accumulated water in the vertical direction at an early stage, and sinks floating filth in the accumulated water. 12 can be efficiently discharged, and the waste discharge performance can be improved. In addition, the filth receiving surface 16 of the bowl portion 8 can be sufficiently cleaned by the cleaning water discharged from each of the first rim water discharge port 22 and the second rim water discharge port 24. Thus, according to the flush toilet 1 by this embodiment, the washing | cleaning property of the bowl part 12 and filth discharge performance improvement can be made compatible.

  Moreover, according to the flush toilet 1 by this embodiment, the filth receiving surface 16 of the bowl part 12 is provided with the front side filth receiving surface 16a and the back side filth receiving surface 16b, and the back side recessed part 40 is the back side filth receiving surface 16b. The swirl flow M2 swirling on the rear filth receiving surface 16b discharged from the second rim spout 24 can be guided to the bottom surface of the recess 20 at an early stage. it can.

  In addition, since the rear recess 40 is formed on the rear filth receiving surface 16b so as to extend from the rear side toward the recess 20, without forming an area of the unwashed portion on the rear filth receiving surface 16b, By this rear side recess 40, the swirling flow M <b> 2 that swirls the rear filth receiving surface 16 b discharged from the second rim water spouting port 24 can be guided to the bottom surface 36 of the recess 20 at an early stage.

  Moreover, since the side surface of the back side recessed part 40 is continuously formed in the substantially same surface as the wall surface 38 of the recessed part 20, the back side waste receiving surface discharged from the 2nd rim water discharge port 24 by the back side recessed part 40 is used. The flow M2 of the swirling flow that swirls 16b can be converted into a downward flow at an early stage, and can be smoothly led to the bottom surface of the recessed portion 20 in the stored water.

  Further, the rear concave portion 40 is formed so as to extend toward the concave portion 20 along the central axis CL extending in the front-rear direction of the bowl portion 8. It is possible to convert the swirling flow M2 that swirls the discharged rear filth receiving surface 16b into a downward flow at an early stage and smoothly guide it to the bottom surface 36 of the recess 20.

  In addition, since the first guide path 42 is formed in a region in front of the first rim water spouting port 22 on the inner peripheral surface 18a of the rim portion 18 where the washing water spouted from the second rim water spouting port turns, this By the first guide path 42, the swirling flow M <b> 2 discharged from the second rim spouting port 24 and swirling on the inner peripheral surface of the rim portion can be quickly guided to the bottom surface 36 of the recess 20.

  In addition, the first guide path 42 is formed so that the height of the overhanging portion of the inner peripheral surface 18a of the rim portion 18 is gradually lowered toward the downstream side in the turning direction. Without forming a non-washing portion on the filth receiving surface 16b, most of the swirling flow M2 swirling on the inner peripheral surface of the rim portion discharged from the second rim water spouting port 24 by the first guide path 42 is quickly recessed 20 It is possible to reliably lead to the bottom surface 36.

  Further, the bottom surface 36 of the concave portion 20 is formed such that a lateral region thereof extends rearward from the front-rear direction center of the concave portion 20 in a plan view, so that the cleaning water guided by the rear concave portion 40 is surely provided in the concave portion 20. It can be received by the bottom surface 36 of this, and the stirring flow of an up-down direction can be formed.

  Note that the flush toilet according to this embodiment described above is an example in which the present invention is applied to a wash-off flush toilet. However, the present invention is not limited to this example. The present invention can also be applied to a so-called siphon type flush toilet that discharges to the outside at once from a pipeline. Furthermore, the present invention can also be applied to waste logistics used to discharge filth (feces, vomit, etc.) in hospitals and the like.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet bowl main body 8 Bowl part of toilet bowl 12 Drainage pipe 16 Waste receiving surface 16a Rear side waste receiving surface 16b Front side waste receiving surface 18 Rim part 18a Inner peripheral surface 20 Concave 22 First rim spout (first Rim water discharge part)
24 2nd rim discharge port (2nd rim discharge unit)
30 Water conduit 32 Introductory line 32a Inlet 34 Drainage trap line 36 Bottom surface 38 Wall surface 40 Back side recess (guide part)
40a, 40b Side 42 First guiding path (guidance part)
44 Second taxiway

Claims (5)

A flush toilet that flushes toilets with washing water supplied from a water supply source and discharges filth, and is formed below a bowl-shaped filth receiving surface, a rim located at an upper edge, and the filth receiving surface. A bowl portion comprising a bottom surface where the recess is located below the level of the stored water, and a wall surface connecting the bottom surface and the lower edge of the waste receiving surface,
A first rim water discharger that is located on one side of the bowl part in the left-right direction and that discharges the swirl flow turning along the inner peripheral surface of the rim part toward the front ;
With it located behind the right and left direction of the other side of the bowl portion, for spouting toward the swirling flow swirling along the inner peripheral surface of the rim portion in the same direction as the swirling flow according to the first rim spouting portion rearward A second rim water spouting unit;
A drainage pipe that has an inlet connected to the recess and discharges filth,
The bowl portion forms a main flow in which the wash water discharged from the first rim water discharge portion flows into the recess from the front side of the bowl portion, and the wash water discharged from the second rim water discharge portion is It is comprised so that the flow which stirs the accumulated water in the above-mentioned crevice in the up-and-down direction,
In the rear side region of the bowl part, a rear side recessed part is formed in which the flow of washing water discharged from the second rim water discharging part and swirling the bowl part flows toward the bottom surface of the recessed part,
The bowl portion of the filth receiving surface includes a front side filth receiving surface and a rear side filth receiving surface, and the rear side recess is formed on the rear filth receiving surface,
The rear concave portion extends from the rear side toward the concave portion on the rear filth receiving surface, extends in both the left and right directions along the rear wall surface of the concave portion , and extends in the front-rear direction of the bowl portion. A flush toilet characterized by extending toward the recess along the axis and having a maximum depth from the upper surface of the rim at the center in the width direction .   The flush toilet according to claim 1, wherein a side surface of the rear concave portion is continuously formed on substantially the same plane as the wall surface of the concave portion. Furthermore, the first guiding portion is provided in a region in front of the first rim water spouting portion along the turning direction of the first rim water spouting portion on the inner peripheral surface of the rim portion where the water discharged from the second rim water spouting portion turns. The flush toilet according to claim 1, wherein The flush toilet according to claim 3, wherein a height of an overhanging portion of the inner peripheral surface of the rim portion of the first guide portion is formed so as to be gradually lowered toward the downstream side in the turning direction. . The flush toilet according to any one of claims 1 to 4, wherein a side surface of the bottom surface of the concave portion extends from the center in the front-rear direction of the concave portion to the rear in a plan view.

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