TWI630308B - Flush toilet - Google Patents

Abstract

The flush toilet (1) of the present invention has a bowl portion (12) having a dirt receiving surface (16); and an edge formed on the upper edge of the bowl portion and having an edge water passage (26) formed therein (18); and sprinkling water (out) with the washing water toward the front, forming an edge spouting port (28) that swirls back to the swirling surface of the dirt receiving surface; and a drain trap line for discharging the dirt (14) The dirt receiving surface of the bowl portion has: an upper dirt receiving surface (20), and a concave portion (22) formed between the upper dirt receiving surface and the drain trap line; the upper dirt receiving surface is formed: The lateral field (C, D) and the front field (A) form a main flow (F1) flowing into the concave portion from the obliquely forward side in a plan view; the concave portion is formed to have a tapered shape at a front view to promote the flow into the concave portion The main flow forms a longitudinal convolutional longitudinal convolution forming portion (22, 34, 36a).

Description

Flush toilet

The present invention relates to a flush toilet, and more particularly to a flush toilet such as a flush type that uses a washing water supplied from a washing water supply source to wash the toilet body and discharge the dirt.

As described in Japanese Laid-Open Patent Publication No. 2011-058300 (Patent Document 1), it is known that in order to clean the surface of the potty portion that receives the dirt, it is provided outside the edge spout of the edge, in order to The washing water of the water storage portion of the agitating portion is further provided with a flush toilet that jets the spout. In addition, in the flush toilet of the patent document 1, "the first edge spouting port provided on the side of the potty portion" and "the second edge spouting port provided in the rear of the potty portion" are provided as the edge. Spitting.

In the flush toilet described in Japanese Laid-Open Patent Publication No. 2012-229569 (Patent Document 2), a water spouting portion is provided at the rear end of the bowl portion, and "use to guide the spouting portion is provided. The water conduit (the shed portion) in which the water conduit of the washing water that is discharged is gradually lowered from the starting position toward the final position causes the washing water discharged from the jetting portion to flow through the water conduit and is swirled in the bowl portion.

However, in the flush toilet described in the above-mentioned Patent Document 1, since the jetting spout is provided, the manufacturing process is complicated, and there is a problem that the cleaning property at the place where the jetting spout is provided is deteriorated. In addition, since the two edge spouts are provided, the washing water containing the "soil that is stored in the water storage portion of the recess" can be effectively stirred, but the cleaning property is changed compared to the case of one edge spout. Poor question.

Further, by providing only the edge spouting port and forming only one edge spouting port, the manufacturing process can be simplified and the cleaning property can be improved, but the basic problem regarding the washing performance is generated, that is, the so-called inclusion The stirring action of the washing water of "the dirt stored in the water storage portion of the recess" is lowered.

Further, as disclosed in Patent Document 2, only one edge spouting port is provided, and the water guiding channel is slightly set to one turn (circle) from the starting position toward the final position, so that the washing water can flow into the retained water in unison, but There is a fundamental problem regarding the cleaning performance, that is, the stirring effect of the so-called retained water (washing water containing dirt) is lowered.

The present invention has been made to solve the above problems of the prior art, and an object of the present invention is to provide an efficient cleaning of a dirt-containing cleaning even when only an edge spouting portion is provided. Water, a flush toilet that increases the efficiency of the discharge of dirt.

In order to achieve the above object, the present invention is a flush toilet that washes a toilet body by using washing water supplied from a washing water supply source and discharges dirt, and is characterized in that: a potty portion having a dirt receiving surface; And an edge portion formed on the upper edge of the bowl portion, and an edge portion of the edge water passage is formed therein; and the washing water supplied from the washing water supply source is spouted forward to form a swirling motion of the swirling surface on the dirt receiving surface a water jetting portion at the edge of the flow; and a drain trap line for discharging the dirt below the potty portion; the dirt receiving surface of the potty portion is provided with: a dirt receiving surface above, and a a concave portion between the upper dirt receiving surface and the drain trap pipe; the upper dirt receiving surface is formed: the two sides of the field and the front field are formed in a bird's-eye view from the obliquely forward direction in the top view; the recess has: The top end tapered shape is formed in a plan view, and the main flow that flows into the concave portion is formed to form a longitudinally swirling longitudinal convolution forming portion.

In the invention described above, the upper dirt receiving surface is formed such that both the side field and the front field form a main flow which flows into the concave portion from the oblique front side in a plan view; the concave portion is formed in a plan view. The tapered shape of the tip end causes the main flow of the inflow recess to form a longitudinal whirling portion that is longitudinally swirled. Therefore, even if the jet spout is not provided and the washing water is discharged only by the edge spouting portion, the longitudinal whirling can be formed in the recess. By flowing, the washing water containing the dirt in the concave portion is effectively stirred, whereby the discharge efficiency of the dirt can be improved.

In the present invention, the upper dirt receiving surface is preferably such that the two sides thereof are formed by a convex surface along the lateral direction, and the front field is along the The front-rear direction is formed by a convex or concave surface having a smaller curvature than the sides of the field.

In the present invention constituting the above, due to the upper dirt receiving surface, the two sides of the field are formed by the convex surface along the lateral direction, and the front field is along the front-rear direction, and the curvature is smaller by the lateral sides. The convex surface or the concave surface is formed, and therefore, the main flow of the concave portion from the obliquely front side can be easily formed.

In the present invention, it is preferable that the inlet of the drain trap line is connected to the rear side of the recessed portion, and the vertical swirl forming portion is provided on the front side of the recessed portion.

In the above aspect of the invention, since the inlet of the drain trap line is connected to the rear side of the recessed portion and the vertical swirl forming portion is provided on the front side of the recessed portion, the vertical swirl of the washing water can be formed on the front side of the recessed portion. The flow is performed, and the washing water containing the dirt in the concave portion is pushed into the drain trap line on the rear side, whereby the discharge efficiency of the dirt can be improved.

In the present invention, it is preferable that the bottom surface of the longitudinal convolution forming portion of the concave portion has an arc shape along the lateral direction.

In the present invention, the bottom surface of the longitudinal convolution forming portion of the concave portion is formed in an arc shape in the lateral direction. Therefore, the washing water that has flowed into the concave portion can be smoothly swirled, and the longitudinal swirling flow can be effectively formed. Thereby, the discharge efficiency of the dirt can be improved.

In the present invention, it is preferable that the bottom surface of the longitudinal swirl forming portion of the concave portion is formed shallower than the bottom surface on the rear side of the longitudinal swirl forming portion.

In the invention according to the above aspect, the bottom surface of the longitudinal convolution forming portion of the concave portion is formed as compared with the bottom surface on the rear side of the longitudinal convolution forming portion. Since it is shallower, the kinetic energy of the washing water flowing into the concave portion can be effectively utilized, and the longitudinal swirling flow can be effectively formed, whereby the discharge efficiency of the dirt can be improved.

In the present invention, it is preferable that the concave portion has a tip end tapered shape of 35 to 70 degrees.

In the invention described above, since the concave portion is formed into a tapered shape of 35 to 70 degrees, the main flow can flow into the concave portion at an angle close to the orthogonal direction, so that it can be effectively formed by the longitudinal convolution forming portion. Form a longitudinal cyclonic flow.

In the present invention, the arc shape of the bottom surface of the concave portion preferably has a radius of curvature of 30 mm to 80 mm.

In the invention described above, since the radius of curvature of the bottom surface of the concave portion is 30 mm to 80 mm, the washing water that has flowed into the concave portion can be swirled more smoothly, and the longitudinal swirling flow can be effectively formed. Thereby, the discharge efficiency of the dirt can be improved.

In the present invention, in the field on both sides of the dirt receiving surface above the bowl portion, the side field on the upstream side in the swirling direction of the washing water is preferably a convex surface larger than the side field on the downstream side. Formed.

In the present invention, the side field on the upstream side in the swirling direction of the washing water is the side of the downstream side in the both sides of the dirt receiving surface above the bowl portion. Since a larger convex surface is formed, the main flow of the washing water flowing into the concave portion from the front can be formed larger, so that the pressing force toward the drain trap line can be increased, whereby the dirt can be further improved. Discharge efficiency.

In the present invention, it is preferable that the edge spouting portion is provided on the front side of the edge portion.

According to the present invention described above, the washing water discharged from the edge water discharge unit forms a main flow that flows into the concave portion from the front after forming a swirl of nearly one turn (week). Therefore, more washing water can be used. Washing the entire surface of the dirt receiving surface will improve the cleaning performance. That is, the following problem can be solved: excessive swirling of the washing water spouted from the edge spouting portion will weaken the mainstream water potential, or when the swirling is insufficient, the flow rate of the washing water that becomes the mainstream and flows into the concave portion and swirls will be Less, resulting in a decrease in the cleaning performance of the upper dirt receiving surface.

Further preferably, the present invention further includes a shed portion in which "the washing water discharged from the edge spouting portion flows therethrough", the shed portion being formed in "from the edge spouting portion to the center of the front and rear direction of the recessed portion" In addition, in the field of the front end of the upper surface of the dirt receiving surface, the shed portion is not formed in the field from the rear end of the shed portion to the rear end of the upper dirt receiving surface.

According to the present invention having the above-described configuration, the shed portion is formed in the field of "from the edge spouting portion to the rear of the center in the front-rear direction of the recessed portion and further toward the rear end of the upper dirt receiving surface", and In the field from the rear end of the shed portion to the rear end of the upper dirt receiving surface, the shed portion is not formed, and the main flow of the washing water flowing in from the rear of the concave portion can be increased, so that the lateral direction of the concave portion can be enhanced ( The swirling in the horizontal direction can thereby increase the discharge efficiency of the dirt in the recess.

In the present invention, the shed portion preferably includes: a first shed portion provided in a region directly downstream of the edge spouting portion; and a lower portion of the shed portion than the first shed portion, and is disposed lower than the first shed portion The second shed of the location.

In the present invention, the washing water discharged from the edge spouting portion first flows through the first shed portion, and then the washing water flows through the second shed portion and is rotated once (circle). It is possible to prevent the washing water that has just been discharged from the edge spouting water from colliding (shocking) with the washing water that has been swirled once (circle).

In the present invention, it is preferable that the first shed portion of the shed portion is formed from the edge water spout portion to a region further forward than the center in the front and rear direction of the recess portion.

According to the invention as described above, the washing water discharged from the edge spouting portion flows through the first shed portion and then flows to the second shed portion, so that the second shed portion is swung one turn (week). In the clean water, since the flow of the washing water flowing from the first shed portion to the second shed portion is stronger, it flows along the inner side of the stronger water flow and flows into the concave portion from the front. Thereby, the main flow of the washing water flowing into the recess from the front is made larger, and the press-fitting force in the drain trap line can be increased, and the discharge efficiency of the dirt can be further improved.

In the present invention, it is preferable that the second shed portion of the shed portion is formed at the same height position along the longitudinal direction thereof.

According to the invention as described above, since the second shed portion is formed at the same height position along the longitudinal direction thereof, the washing water flowing through the second shed portion easily flows to the rear side, thereby being rearward. The main flow of the washing water flowing into the recess can be formed larger, and a larger swirling flow in the horizontal direction (horizontal direction) can be generated, which can further improve the discharge efficiency of the dirt.

In the present invention, the area in front of the dirt receiving surface above the bowl portion is preferably formed by a concave surface.

According to the invention as described above, since the front surface of the dirt receiving surface above the bowl portion is formed by the concave surface, the main flow of the washing water flowing into the concave portion from the front can be formed larger, and therefore, the drainage can be made toward the drainage. The press-in force in the trap line is increased, whereby the discharge efficiency of the dirt can be further improved.

In the present invention, it is preferable that the edge spouting portion is provided on the front side of the edge portion.

According to the present invention described above, the washing water discharged from the edge water discharge unit forms a main flow that flows into the concave portion from the front after forming a swirl of nearly one turn (week). Therefore, more washing water can be used. Washing the entire surface of the dirt receiving surface will improve the cleaning performance. That is, the following problem can be solved: excessive swirling of the washing water spouted from the edge spouting portion will weaken the mainstream water potential, or when the swirling is insufficient, the flow rate of the washing water that becomes the mainstream and flows into the concave portion and swirls will be Less, resulting in a decrease in the cleaning performance of the upper dirt receiving surface.

A‧‧‧ front field

B‧‧‧ Rear field

C‧‧‧Right side field

D‧‧‧left side field

F1‧‧‧ mainstream from the oblique front into the recess

F2‧‧‧ Mainstream flowing into the recess from the rear

H‧‧‧lateral vortex

L‧‧‧Water storage level

V‧‧‧longitudinal swirl

1‧‧‧ flush toilet

2‧‧‧ toilet body

4‧‧‧ wall

6‧‧‧Water storage tank

8‧‧‧Operation switch

10‧‧‧Drainage pipe

12‧‧‧ potty

14‧‧‧Draining trap pipe

14a‧‧‧ Entrance

14b‧‧‧ highest point

14c‧‧‧Export

16‧‧‧Stainage interface

18‧‧‧Edge

20‧‧‧Top dirt receiving surface

20a‧‧‧ backend

22‧‧‧ recess (longitudinal formation)

22a‧‧ Center

24‧‧‧Water room

26‧‧‧ Edge waterway

28‧‧‧Edge spout (edge spouting)

30‧‧‧1st shed

32‧‧‧2nd shed

32a‧‧‧ Backend

32b‧‧‧ Backend

34‧‧‧Wall 34 (longitudinal formation)

36‧‧‧ bottom

36a‧‧‧Front bottom surface (longitudinal formation)

36b‧‧‧ rear bottom

Fig. 1 is a schematic view showing a state in which a flush toilet according to an embodiment of the present invention is installed on a wall surface.

Fig. 2 is a plan view showing a flush toilet according to an embodiment of the present invention.

Fig. 3 is a side cross-sectional view of the flush toilet as seen along line III-III of Fig. 2.

Fig. 4 is a perspective view of the flush toilet of Fig. 2 viewed obliquely from the rear.

Fig. 5 is a perspective view of the flush toilet of Fig. 2 viewed from above the side.

Fig. 6 is a front cross-sectional view of the flush toilet as seen along line VI-VI of Fig. 2.

Figure 7 is a front cross-sectional view of the flush toilet as seen along line VII-VII of Figure 2.

Fig. 8 is a front cross-sectional view of the flush toilet as seen along line VIII-VIII of Fig. 2.

Fig. 9 is a front cross-sectional view of the flush toilet as seen along line IX-IX of Fig. 2.

Fig. 10 is a perspective view showing a "dynamic flow of washing water in a flush toilet according to an embodiment of the present invention" from the side.

Fig. 11 is a perspective view showing "a flow of a washing water in a flush toilet according to an embodiment of the present invention" viewed from above.

Next, a flush toilet according to an embodiment of the present invention will be described with reference to the drawings. First, the installation state of the flush toilet of this embodiment will be described based on Fig. 1 . Fig. 1 is a schematic view showing a state in which a flush toilet according to an embodiment of the present invention is installed on a wall surface. As shown in Fig. 1, reference numeral 1 denotes a flush toilet 1 of the present embodiment, which is arranged by a drop caused by a rise in the water level in a drain trap pipe to be described later. A wash down type toilet for the dirt. In the present embodiment, the flush toilet can also be other types of toilets.

The flush toilet 1 is provided with a toilet body 2 that is attached to the wall 4. On the back side of the wall 4, a water storage tank 6 for storing the washing water is attached, and an operation switch 8 is attached to the surface of the wall 4. When the ON operation is performed on the operation switch 8, it is formed that the washing water in the water storage tank 6 is supplied to the toilet body 2, and the toilet body 2 can be washed. Further, on the back side of the wall 4, a drain pipe 10 for discharging dirt is provided, and the drain pipe 10 is formed to discharge the dirt from the toilet body 2 to the outside.

Next, the flush toilet 1 of the present embodiment will be described in detail based on Figs. 2 to 9 . Fig. 2 is a plan view showing a flush toilet according to an embodiment of the present invention, Fig. 3 is a side sectional view of the flush toilet seen along line III-III of Fig. 2, and Fig. 4 is obliquely upward from the rear. Looking at the perspective view of the flush toilet of Fig. 2, Fig. 5 is a perspective view of the flush toilet of Fig. 2 viewed from above the side. Fig. 6 to Fig. 9 are front cross-sectional views of the flush toilet seen along lines VI-VI, VII-VII, VIII-VIII and IX-IX of Fig. 2, respectively.

As shown in FIGS. 2 and 3, the toilet body 2 of the flush toilet 1 according to the embodiment of the present invention has a bowl portion 12 and a drain trap line 14 extending from the bottom of the bowl portion 12. The potty portion 12 includes a dirt receiving surface 16 and an edge portion 18 formed on the upper edge of the dirt receiving surface 16. In addition, the dirt receiving surface 16 of the bowl portion 12 includes: an upper dirt receiving surface 20 in the shape of a potty, and a dirt formed on the upper surface A recess 22 between the receiving surface 20 and the drain trap line 14.

The drain trap line 14 extends obliquely upward from the inlet 14a formed at the bottom of the bowl portion 12 from the opening, and extends obliquely downward after passing through the highest point 14b to reach the outlet 14c and is connected to the drain pipe 10 described above. (See Figure 1). The water storage level L of the flush toilet 1 is equal to the height of the highest point 14b of the drain trap line 14.

Further, a water passing chamber 24 is formed in the rear portion of the toilet body 2, and the washing water is supplied to the water passing chamber 24 by the above-described water storage tank 6. The water passing chamber 24 has a front side extending to the edge portion 18 and is connected to the "edge water passage 26 formed inside the edge portion 18". The toilet body 1 is viewed from the front, and an edge spout 28 is formed on the inner peripheral side of the front side of the left side of the edge portion 18. The edge water passage 26 extends to the edge spout 28, and the washing water is supplied to the edge spit. Nozzle 28. The washing water is discharged from the edge spouting port 28 toward the front, and a swirling flow is formed in the bowl portion 12.

Next, the shed portion of the flush toilet 1 will be described with reference to Figs. 2 to 5 . As shown in FIGS. 2 to 5, on the inner peripheral side of the edge portion 18 and on the downstream side of the edge spouting port 28, a first shed portion 30 through which the washing water flows is formed. The first shed portion 30 has the same height as the edge spouting port 28, and extends from the position of the edge spouting port 28 (the front left front region of the bowl portion 12 as viewed from the front) to the front region on the right side of the bowl portion 12.

Further, a second shed portion 32 is formed between the edge portion 18 and the upper dirt receiving surface 20. The second shed portion 32 is located in the first shed portion 30 The inner side is provided at a position lower than the first shed portion 30 with a step difference therebetween. As shown in FIG. 2, the second shed portion 32 is a rear region extending from the rear side of the left side to the right side through the front end as viewed from the front of the bowl portion 12. Specifically, the left and right rear end portions 32a and 32b of the second shed portion 32 are further rearward than the center 22a in the rear direction of the concave portion 22 and extend to the front end 20a of the upper dirt receiving surface 20. field of. Further, the second shed portion 32 is formed at the same height position along the longitudinal direction thereof. On the other hand, in the field between the rear ends 32a and 32b of the second shed portion 32 and the rear end 20a of the upper dirt receiving surface 20, the shed portion is not formed but formed in a curved shape.

In the present case, although the second shed portion 32 is formed to be bilaterally symmetrical, it may be formed to be non-left-right symmetric, and may extend from the vicinity of the edge spouting port 28 to the upstream side of the swirling direction of the washing water, that is, to the right side of the potty portion. Formed in the rear field. The upstream side of the swirling direction of the washing water means a portion where the swirling washing water flows substantially above the upper dirt receiving surface. Therefore, in the present embodiment, since the edge spout is located on the left side from the front of the bowl portion, a very small amount of washing water flows first to the upper dirt receiving surface on the left side, but most of the washing is compared to the left side. The water flows to the upper dirt receiving surface on the right side, and once the left and right sides of the potty are compared, the upstream side of the swirling direction of the washing water becomes the right side.

Next, the surface shape of the dirt receiving surface 20 above the dirt receiving surface 16 of the bowl portion 12 will be described in detail with reference to Figs. 2 to 9 . As shown in Fig. 2, the dirt receiving surface 20 above the bowl portion 12 has a front field A, a rear field B, and a right side field C in a plan view. And the left side field D.

The right side field C and the left side field D of the upper dirt receiving surface 20 are formed by convex surfaces of the same curvature along the lateral direction (orthogonal to the front and rear directions of the toilet body 1) (see Fig. 8 and 9)), the front field A is formed by a concave surface in the front-rear direction (see Fig. 3), and the rear field B is formed by a convex surface having a smaller curvature than the right side field C and the left side field D (see Figure 2).

Here, the front field A may be formed in the same manner as the rear field B, and may have a convex surface having a smaller curvature than the right side field C and the left side field D along the front-rear direction. Further, the rear field B may be formed in the same manner as the front field A and formed by a concave surface in the front-rear direction.

In addition, the upstream side of the swirling direction of the washing water, that is, the right side field C, may be formed by a convex surface having a larger curvature in the lateral direction than the left side field D on the downstream side.

By forming the above-described "surface shape of the dirt receiving surface 20 above the dirt receiving surface 16 of the bowl portion 12", a part of the washing water discharged from the edge spout 28 will be described later in detail. When the bowl portion 12 is rotated for one week, the main flow F1 that flows into the recess 22 from the front is formed, and a part of the washing water that is discharged from the edge spout 28 forms a "mainstream F2 that flows into the recess 22 from the rear" (see Figure 10, Figure 11).

Next, the concave portion 22 of the dirt receiving surface 16 of the bowl portion 12 will be described in detail with reference to FIGS. 2, 3, and 8.

The recess 22 is close to a triangle in a plan view, and forms a front end The tapered shape of the tip that is tapered toward the front. The recessed portion 22 is formed by the side wall 34 and the bottom surface 36, and the bottom surface 36 includes a front bottom surface 36a at the front and a rear bottom surface 36b at the rear. The front bottom surface 36a is formed shallower than the rear bottom surface 36b (see Fig. 3). Further, the rear bottom surface 36b is connected to the inlet 14a of the drain trap line 14.

In the present invention, as shown in Fig. 8, the front bottom surface 36a of the recess 22 is formed in an arc shape in the lateral direction. Specifically, in order to effectively form the longitudinal swirling flow V to be described later, the curvature radius R of the front bottom surface 36a is preferably formed in the range of 30 mm to 80 mm.

Further, the angle θ of the tapered shape of the front end of the concave portion 22 is preferably 35 to 70 degrees in order to effectively form the longitudinal swirling flow V, wherein 35 to 60 degrees is more preferable, and 40 to 50 degrees is most suitable. .

In addition, as shown in FIG. 2, the rear side of the triangular shape of the recessed portion 22 is formed in an arc shape in a plan view, and the lateral swirling flow H to be described later can be effectively formed.

Next, the operation of the flush toilet according to the embodiment of the present invention will be described with reference to Figs. 10 and 11. FIG. 10 is a perspective view of a "flowing water flow in a flush toilet according to an embodiment of the present invention", and FIG. 11 is a view showing an embodiment of the present invention. A perspective view of a flushing water flow in a flush toilet.

Once the user performs an ON operation on the operation switch 8, the washing water in the water storage tank 6 will enter the water passing chamber 24 of the toilet body 2, and from the water passing chamber 24 via the edge water passage 26, from the edge spouting port 28 towards The potty portion 12 is spit out.

The washing water discharged from the edge spouting port 28 first flows on the first shed portion 30, then flows down to the second shed portion 32, and flows through the second shed portion 32 to form a swirling flow in the potty portion 12. . At this time, a part of the washing water which is swirled in one turn (week) in the bowl portion 12 flows into the inner peripheral side of the "washing water discharged from the edge spouting port 28", and flows into the recess 22 from the oblique front side. Mainstream F1.

Further, although the washing water discharged from the edge spouting port 28 flows through the second shed portion 32, the shed portion is not formed but the curved portion is formed in the rear end region of the upper dirt receiving surface 20, so that the washing is performed A part of the water flows into the main flow F2 flowing into the recess 22 from the obliquely rear side.

Then, the main flow F1 flowing into the concave portion 22 from the obliquely forward direction flows down along the side wall of the concave portion 22, and flows upward along the front bottom surface 36a to change the direction upward, and rises along the side wall to form the longitudinal swirling flow V. In addition, the main flow F1 causes "injection flow into the drain trap line 14" to occur.

Further, the main flow F2 flowing into the concave portion 22 from the obliquely rearward direction flows in a substantially horizontal direction along the side wall of the concave portion 22 to form a lateral swirling flow H.

As a result, in the flush toilet 1 of the present embodiment, even if the jet spout is not provided like a conventional flush toilet, the longitudinal swirling flow V and the transverse swirling flow H formed in the recess 22 can be used. Effectively agitating the washing water containing the dirt, the discharge efficiency of the dirt can be improved.

Hereinafter, the action of the flush toilet 1 of the present embodiment will be specifically described. First, in the flush toilet 1 of the present embodiment, the potty portion The dirt receiving surface 20 above the dirt receiving surface 16 of the 12, the right side field C and the left side field D are formed by a convex surface along the lateral direction, and the front field A and the rear field B are along the front and rear direction, Since the curvature is formed by a convex surface or a concave surface which is smaller than the both sides, the concave portion 22 of the bowl portion 12 can be formed even if the jet water spouting portion is not provided and the washing water is discharged only by the one edge spouting port 28. The front and the rear of the recess 22 flow into the main flow F1 and F2 of the recess 22, respectively. Specifically, the main flow F1 of the washing water flowing in from the front side of the recessed portion 22 causes the "pressing flow in the drain trap line 14" to be generated, and the main flow F2 of the washing water flowing from the rear of the recessed portion 22 causes " A swirling flow H" in the lateral direction (horizontal direction) is generated. As a result, according to the flush toilet 1 of the present embodiment, the washing water which is discharged from the edge spouting port 28 can efficiently agitate the washing water containing the dirt in the recess 22 of the bowl portion 12, thereby improving the flushing water. The efficiency of the discharge of dirt.

Next, in the flush toilet 1 of the present embodiment, the front field A of the dirt receiving surface 20 above the bowl portion 12 is formed by a concave surface, and the rear field B is a field having a curvature closer to the right side C and the left side. In the case where the smaller convex surface D is formed, the main flow F1 of the washing water flowing in from the front of the concave portion 22 becomes larger, so that the pressing force toward the inside of the drain trap line 14 can be increased, whereby Further improve the efficiency of the discharge of dirt.

Then, in the flush toilet 1 of the present embodiment, the right side field C on the upstream side in the washing water swirling direction of the dirt receiving surface 20 above the bowl portion 12 is the left side field D on the downstream side. In the case where a larger convex surface is formed, the washing water flowing in from the front of the concave portion 22 Since the main flow F1 becomes larger, the press-in force toward the inside of the drain trap line 14 can be increased, whereby the discharge efficiency of the dirt can be further improved.

Then, in the flush toilet 1 of the present embodiment, since the edge spouting port 28 is provided on the front side of the edge portion 18, the washing water discharged from the edge spouting port 28 is formed in a swirl of nearly one turn (week). Thereafter, since the main flow F1 flows into the concave portion 22 from the front side, the entire dirt receiving surface 20 can be washed with more washing water, and the washing performance is improved.

Next, in the flush toilet 1 of the present embodiment, the second shed portion 32 is formed "from the edge water spouting port 28 to the rear of the center 22a in the front-rear direction of the recessed portion 22, and the upper dirt receiving surface is formed. In the field from the rear end of the second shed portion 32 to the rear end of the upper dirt receiving surface 20, the area of the rear end 20a of the second shed portion 32 can be made to flow into the water of the recess 22 from the rear. The amount of water is increased, and the washing water containing the dirt can be more effectively swirled in the concave portion 22. As a result, according to the flush toilet 1 of the present embodiment, the washing water containing the dirt can be efficiently stirred in the recess 22 of the bowl portion 12 by the washing water discharged from the one edge spouting port 28. It can improve the discharge efficiency of dirt.

Then, in the flush toilet 1 of the present embodiment, the "first shed portion 30 provided in the area immediately downstream of the edge spouting port 28" and "the inside of the first shed portion 30 are provided, and Since the second shed portion 32" is provided at a position lower than the first shed portion 30, the washing water discharged from the edge spout 28 first flows on the first shed portion 30, and then the washing water flows. It is rotated one turn (week) on the second shed 32, thus preventing: just The washing water discharged from the edge spouting port 28 collides with the washing water that has been swirled once (circle) (impact).

In the flush toilet 1 of the present embodiment, the first shed portion 30 is formed in the "from the edge spouting port 28 to the front side of the center 22a in the rear direction of the recessed portion 22". The washing water discharged from the nozzle 28 flows through the first shed portion 30 and then flows to the second shed portion 32. Therefore, the washing water is swirled once in the second shed portion 32 for one turn (week). The flow of the washing water flowing through the shed portion 30 to the second shed portion 32 is stronger. Therefore, it flows along the inner side of the stronger water flow, and flows into the concave portion 22 from the front. Thereby, the main flow F1 of the washing water flowing in from the front side of the recessed portion 22 is made larger, and the press-fitting force in the drain trap line 14 can be increased, and the discharge efficiency of the dirt can be further improved.

In the flush toilet 1 of the present embodiment, since the second shed portion 32 is formed at the same height position along the longitudinal direction thereof, the washing water flowing through the second shed portion 32 easily flows to the rear side. Thereby, the main flow F2 of the washing water flowing in from the rear of the concave portion 22 can be formed larger, and a larger swirling flow in the horizontal direction (horizontal direction) can be generated, and the discharge efficiency of the dirt can be further improved.

Next, in the flush toilet 1 of the present embodiment, the upper dirt receiving surface 16 is formed such that the right side field C, the left side field D, and the front field A are formed into the concave portion 22 from the obliquely front side in a plan view. The main body F1; the recessed portion 22 is provided with a tip end tapered shape formed in a plan view angle, and the main flow F1 flowing into the recess portion is formed into a longitudinal whirling longitudinal wrap forming portion, that is, the side wall 34 and the front bottom surface 36a, so that even When the jet water spouting port is not provided, and the washing water is discharged only by the edge spouting port 28, the vertical swirling flow V can be formed in the recessed portion 22, and the washing water containing the dirt in the recessed portion 22 can be effectively stirred. It can improve the discharge efficiency of dirt.

Then, in the flush toilet 1 of the present embodiment, the inlet 14a of the drain trap line 14 is connected to the rear side of the recess 22, and the side wall 34 and the front bottom surface 36a as the vertical swirl forming portion are provided on the front side of the recess 22. Therefore, the dirt-containing washing water in the recess 22 can be pressed into the drain trap line 14 by the longitudinal swirling flow V of the washing water, whereby the discharge efficiency of the dirt can be improved.

In the flush toilet 1 of the present embodiment, since the front bottom surface 36a of the recessed portion 22 is formed in an arc shape in the lateral direction, the washing water that has flowed into the recessed portion 22 can be smoothly swirled, and the longitudinal swirl can be effectively formed. The flow V, whereby the discharge efficiency of the dirt can be improved.

In the flush toilet 1 of the present embodiment, since the front bottom surface 36a of the recess 22 is shallower than the rear bottom surface 36b, the movement energy of the washing water having flowed into the recess 22 can be effectively utilized to form the longitudinal swirl. The flow V, whereby the discharge efficiency of the dirt can be improved.

Next, in the flush toilet 1 of the present embodiment, since the concave portion 22 is formed in a tapered shape of 35 to 70 degrees, the main flow F1 can flow into the concave portion at an angle close to the orthogonal direction, so that the vertical rotation can be performed by the longitudinal rotation. The forming portion also refers to the side wall 34 and the front bottom surface 36a, and effectively forms a longitudinal swirling flow.

Next, in the flush toilet 1 of the present embodiment, The arc shape of the front bottom surface 36a of the recessed portion 22 has a radius of curvature of 30 mm to 80 mm. Therefore, the washing water that has flowed into the recessed portion 22 can be smoothly swirled, and the longitudinal swirling flow V can be effectively formed, thereby improving dirt. Discharge efficiency.

Claims (15)

A flush toilet is a flush toilet that washes a toilet body by washing water supplied from a washing water supply source, and is characterized in that: a toilet having a dirt receiving surface; and forming An edge portion of the edge water passage is formed in the upper edge of the bowl portion; and the washing water supplied from the washing water supply source is discharged toward the front to form a swirling flow which is swirled on the dirt receiving surface. An edge spouting portion; and an inlet connected to the drain trap conduit for discharging dirt under the potty portion, wherein the dirt receiving surface of the potty portion has an upper dirt receiving surface and is formed thereon a concave portion between the dirt receiving surface and the drain trap line, wherein the upper dirt receiving surface is formed in a side field and a front field thereof, and forms a main flow that flows into the concave portion from obliquely forward in a plan view, and the concave portion is provided a vertical rotation forming portion that causes the main flow that flows into the concave portion to form a longitudinal rotation, the vertical rotation forming portion includes a front bottom surface that is provided to be close to a triangle in a plan view angle, and a front side of the concave portion whose front end is tapered toward the front side, and a side wall which is formed in a straight line shape and which is provided on the front side of the concave portion, and the concave portion is formed to have a longer length in the height direction than the upper dirt receiving surface. Such as the flush toilet described in claim 1 of the patent scope, wherein The upper dirt receiving surface is formed by a convex surface along the lateral direction, and the front field is formed along the front-rear direction by a convex or concave surface having a smaller curvature than the above-mentioned two-side fields. The flush toilet according to the first or second aspect of the invention, wherein the inlet of the drain trap conduit is connected to a rear side of the recessed portion, and the vertical swirl forming portion is provided on a front side of the recessed portion. The flush toilet according to the first or second aspect of the invention, wherein the bottom surface of the longitudinal convolution forming portion of the recess is formed in an arc shape along the lateral direction. The flush toilet according to the third aspect of the invention, wherein the bottom surface of the longitudinal convolution forming portion of the recess is shallower than the bottom surface on the rear side of the longitudinal convolution forming portion. The flush toilet according to claim 1 or 2, wherein the recessed portion has a tip end tapered shape of 35 to 70 degrees. The flush toilet according to the fourth aspect of the invention, wherein the arc shape of the bottom surface of the concave portion has a radius of curvature of 30 mm to 80 mm. The flush toilet according to the second aspect of the invention, wherein the lateral side of the upstream side of the swirling direction of the washing water is a downstream side in the both sides of the dirt receiving surface above the bowl portion A larger convex surface is formed in the lateral side of the side. The flush toilet according to the second or eighth aspect of the invention, wherein the edge spouting portion is provided on a front side of the edge portion. The flush toilet according to claim 2, further comprising: the washing water discharged from the edge spouting portion flows a shed portion on which the shed portion is formed from the edge water spouting portion to a position further rearward than a center in a front-rear direction of the recess portion and further forward than a rear end of the upper dirt receiving surface; and In the field from the rear end of the shed portion to the rear end of the upper dirt receiving surface, a shed portion is not formed. The flushing toilet according to claim 10, wherein the shed portion includes: a first shed portion provided in a region immediately downstream of the edge spouting portion; and an inner side of the first shed portion The second shed is located at a lower position than the first shed. The flush toilet according to claim 11, wherein the first shed portion of the shed portion is formed from the edge water spout portion to a region further forward than a center in a front-rear direction of the recess portion. The flush toilet according to claim 11 or 12, wherein the second shed portion of the shed portion is formed at the same height position along the longitudinal direction thereof. The flush toilet according to claim 10, 11 or 12, wherein the front surface of the dirt receiving surface above the bowl portion is formed by a concave surface. The flush toilet according to claim 10, wherein the edge water spouting portion is provided on a front side of the edge portion.