JP4284703B2 - Flush toilet - Google Patents

Description

  The present invention relates to a flush toilet, and more particularly to a flush toilet that forms a swirling flow to perform washing and discharge of filth.

A conventional general flush toilet has a rim having a rectangular cross section in the upper green part, and a water passage is formed in the rim, and a hole or slit for discharging washing water to the waste receiving surface is formed on the lower surface of the rim. Yes.
However, in the flush toilet described above, there is a problem that the boundary between the lower surface of the rim and the waste receiving surface becomes a blind spot when viewed from above, and in particular, the cleaning water does not flow around the lower surface of the rim, so there is a problem that dirt is likely to remain. In addition, since it is difficult to see the boundary portion, the glaze may not be completely applied, which also causes dirt to adhere.

In order to solve the problem of such a conventional general flush toilet, the present applicant proposed a new structure of flush toilet which does not use a water passage in the rim by WO98 / 16696 (Patent Document 1). .
In this flush toilet, the inner surface of the rim facing the bowl and the filth receiving surface have a smooth and continuous shape so that there are no shadows, and the wash water is supplied to the bowl at the rear of the bowl. A spout is provided at one location, and the cleaning water is spouted from the spout to the vicinity of the boundary between the rim and the filth receiving surface to form a swirling flow so that the cleaning water can be spread over the entire surface of the filth receiving surface. Is.

In the above-mentioned WO98 / 16696, the inner surface of the rim is overhanged to prevent the washing water from jumping out of the toilet bowl. In addition, if the cleaning water is swirled once, the distance becomes long and the water discharge pressure has to be increased, and the shape is not flexible because it is distributed uniformly. In view of this, a structure has also been proposed in which water outlets are provided on the left and right sides of the rear part of the bowl, and the wash water from the water supply source is branched left and right and supplied to the water outlets.
Japanese Laid-Open Patent Publication No. 9-125502 (Patent Document 2) discloses a flush toilet in which a distributor is disposed at the lower part of a low tank and bubble dispersed water (wash water) is supplied to the bowl part separately on the left and right. Has been.
Furthermore, JP-A-2000-96689 (Patent Document 3) discloses a flush toilet in which a plurality of water outlets are provided and one swirl flow is formed by the plurality of water outlets. Specifically, there are two spouts at the front end and the rear end of the bowl part, or at four places at the front end, rear end, right center and left center of the bowl part. Is provided.

WO98 / 16696 JP-A-9-125502 JP 2000-96689 A

  In the flush toilet using the flush water tank, when the flush water in the tank is supplied to the toilet bowl, the amount of water in the tank decreases as washing progresses, so the water head pressure inevitably decreases. In order to ensure sufficient swirl flow necessary for cleaning, if the head pressure is increased, the amount of water discharged from one spout increases in the initial stage of cleaning, and the cleaning water may jump out of the toilet. Further, at the end of cleaning, the swirling flow of cleaning water does not sufficiently reach the end portion, and there is a possibility that the bowl portion may not be sufficiently cleaned.

  In order to solve this problem, a plurality of water discharge ports may be provided. However, as disclosed in WO98 / 16696 (Patent Document 1) and JP-A-9-125502 (Patent Document 2), In a structure that branches to the left and right by a distributor or the like and discharges wash water, two swirling flows in opposite directions are formed, and there is a problem that the wash water collides and jumps at the central portion of the toilet bowl.

  Further, JP 2000-96689 A (Patent Document 3) discloses a configuration in which a swirl flow in one direction is formed by a plurality of water discharge ports, but simply a plurality of water discharge ports are provided. Then, it is not possible to effectively perform the cleaning of the ball portion (ball surface) required for the flush toilet and the conveyance and discharge of filth, and a specific configuration that can satisfy these requirements, for example, the position of the water outlet, the water outlet There is no proposal on how to supply cleaning water to the water, and there is a problem in practical terms.

    Then, this invention aims at providing the flush toilet which can wash | clean a bowl part and discharge | emit waste effectively, when washing water spreads enough to the terminal part of a swirl flow.

In order to achieve the above object, the present invention is a flush toilet that flushes toilets with the wash water stored in the wash water tank and discharges waste, and has a bowl-shaped waste receiving surface and an upper edge portion. A bowl portion having a rim portion whose inner peripheral surface overhangs inwardly, a shelf portion formed between the rim portion and the waste receiving surface, and a lower portion of the bowl portion. A drainage channel connected to the inlet for discharging filth, a first water discharger for discharging washing water on the shelf of the bowl to form a swirl, and a swirl direction of the swirl on the shelf of the bowl A second water discharge unit that discharges wash water in the same direction, a push-in wash water discharge unit that discharges wash water in a direction to push filth into the drainage channel, and a supply of wash water from the wash water tank to the first water discharge unit A first water passage and a second passage for supplying wash water from the wash water tank to the second water discharge section. A road, and a third water passage for supplying the wash water to push the wash water spouting portion from the washing tank, has a first water discharge portion of the bowl portion of one side of the center in the longitudinal direction of the bowl portion It is arranged in the vicinity of the position where the small curvature radius changes to the large curvature radius, and the second water discharge part is arranged in the vicinity of the position where the large curvature radius of the other bowl portion changes from the small curvature radius. It is characterized by.

  According to the present invention configured as described above, the inner peripheral surface of the rim portion is formed to overhang inward, so that there is no blind spot portion as in the prior art, and the toilet bowl can be easily cleaned. And the toilet bowl can always be kept clean.

Next, since two water discharge sections are provided, the swirling distance of the wash water discharged from one water discharge section is shortened, and even if the cleaning proceeds and the tank head pressure is low, the wash water is at the end of the swirl flow. The bowl part (bowl surface) can be washed sufficiently because it can reach the part sufficiently. Further, since the first water discharger and the second water discharger discharge the washing water onto the shelf of the bowl part to form one swirl flow, compared with the case where two swirl flows are formed. By collecting the filth in the bowl portion near the swirling center of the swirling flow and guiding it to the drainage channel while forming a swirling flow toward the inlet of the drainage channel, the waste can be discharged more effectively outside the toilet.
Further, the cleaning water can be discharged from the indentation cleaning water spouting unit to effectively push the filth into the drainage channel.

  Further, the bowl portion is generally elliptical, and the curvature radius is small in the front end and rear end regions, and the curvature radius is large in the right and left regions in plan view. Therefore, in the present invention, the first water discharge portion is disposed in the vicinity of the position where the bowl portion on one side changes from a small radius of curvature to a large radius of curvature with the front-rear direction of the bowl portion as the center. Since the portion is arranged in the vicinity of the position where the bowl portion on the other side changes from a large radius of curvature to a small radius of curvature, one side of the bowl portion ( For example, a region with a large radius of curvature on the left side when viewed from the front, a region with a small radius of curvature at the front end, and a region with a large radius of curvature on the other side (for example, the right side when viewed from the front) are cleaned and the remaining rear end Since the region having a large radius of curvature is cleaned by the cleaning water discharged by the second water discharger, the entire region of the bowl can be effectively cleaned.

In the present invention, preferably, the second water passage is U-turned and communicates with the second water discharger.
According to the present invention thus configured, the second water passage makes a U-turn inside the rim portion and communicates with the second water discharge portion, so that the cleaning water is supplied to the second water discharge portion. There is no need for the second water passage to go around the rim portion for a long distance, the frictional resistance is reduced, and the energy loss is reduced.

In the present invention, preferably, the amount of rim water discharged from the first water discharger is greater than the amount of rim water discharged from the second water discharger.
According to the present invention configured as described above, most of the bowl portion is washed by the wash water discharged from the first water discharge portion, and the remaining portion is washed by the wash water discharged from the second water discharge portion. Therefore, the bowl part can be reliably cleaned. In addition, the wash water discharged from the first water discharge port can easily form a flow (main flow portion) from the tip of the bowl portion toward the drain port, and the formed main flow portion allows waste, particularly floating waste, to enter the drainage channel. Demonstrate the function to push.

In the present invention, preferably, the shelf part of the bowl part is formed so that the width thereof changes so that the main flow part of the wash water discharged from the first water discharge part flows toward the inlet of the drainage channel. .
In the present invention configured as described above, since the main flow part of the wash water discharged from the first water discharge part flows toward the inlet of the drainage channel, the width thereof is changed, so that the comparison is made. Since a large amount of water (the amount of water in the mainstream portion) is supplied toward the drainage channel, the filth, especially the filth that has floated on the surface of the stored water, can be easily guided to the drainage channel.

In the present invention, preferably, the shelf of the bowl part is formed so that its width is wide in both side regions centering on the front-rear direction of the bowl part and narrow in the front end region of the bowl part.
According to the present invention configured as described above, the main flow part of the wash water discharged from the first water discharge part is simply directed toward the inlet of the drainage channel by simply changing the shelf width of the bowl part. It can be made to flow.

  In the present invention, the shelf portion of the bowl portion is inclined downward, and the inclination angle is in the range of 0 to 15 degrees downward.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. First, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view showing a flush toilet according to the first embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the flush toilet shown in FIG. 1, and FIGS. It is the fragmentary sectional view seen along the AA line-EE line.

  The flush toilet of the first embodiment shown in FIGS. 1 to 3 is made of earthenware with a glaze layer formed on the surface, a skirt portion 1 is formed at the lower portion, and a bowl portion 2 is formed at the front of the upper half portion. A water guide channel 3 is formed in the upper rear portion, and a drain channel 4 is formed in the lower rear portion.

  The bowl portion 2 has a bowl-shaped filth receiving surface 5 and a rim 6 constituting an upper edge portion. The drying surface 5a of the filth receiving surface 5, the shelf 6c, and the inner side surface 6a of the rim 6 are smooth curved surfaces. Is continuous. Then, the inner surface 6a can be easily wiped off using a disposable paper or the like so that there is no blind spot when viewed from above, and the washing water may jump out. In order to avoid this, the inner side surface 6a of the rim 6 has a shape that overhangs to some extent inward.

  An entrance 4a of the drainage channel 4 is opened at the center of the filth receiving surface 5 below the surface of the stored water, and the ascending channel 4b extends backward from the drainage channel entrance 4a, and the descending channel 4c is connected to the ascending channel 4b. (Vertical pipe) continues, and the lower end of the descending path 4c is connected to the discharge pipe via a joint (not shown).

  In the rear ceiling surface of the water conduit 3, an opening 3 a connected to a water storage tank or a flash valve connected to a water pipe is formed. Further, the width of the water guide channel 3 is narrowed by the left and right side walls 31, 31, and the rim 6 on one side (left side when viewed from the front side of the bowl portion 2) is provided inside the one side wall. A guide portion 31a is provided to guide the inside.

  In addition, the washing water guided to the guide portion 31a at the front part of the water conduit 3 is left in a plan view of the flush toilet from the rim connection holes 63 and 64 that are divided vertically by the partition wall 62 in front of the water conduit side wall 31. It goes around (flowing direction of the washing water), passes through the water passages 63a and 64a divided by the partition wall 62 shown in FIG. 3B, and then the lower water passage 63a is connected to the first water outlet 11 and the upper water passage 63a. The water channel 64a further passes through the rim of the front part of the toilet bowl, and is connected to the second water outlet 12 through the water channels 65 and 66 shown in FIGS. 3 (c) and 3 (d).

  On the other hand, the wash water flowing in from the rim connection hole 63 communicates with the water passage 7a for supplying the wash water to the indentation washing water outlet 7 as shown in FIG. 3 (a) through the bottom opening 61 of the water passage 63a. ing. This push-in washing water spout 7 is opened below the surface of the water and exhibits the function of discharging the washing water in the direction of pushing the filth into the drainage channel 4.

  The height positions of the first and second water discharge ports 11 and 12 are both near the boundary between the drying surface 5a of the filth receiving surface 5 and the inner surface 6a of the rim 6, and the front and rear positions are drainage channel inlets 4a in plan view. In the first water outlet 11, the water discharge direction of the washing water is forward, and in the second water outlet 12, the water discharge direction of the washing water is rearward. Thus, a single swirling flow is formed in the bowl portion 2 by the counterclockwise washing water in plan view.

  In the first embodiment described above, the cleaning water supplied from the water supply source flows separately from the rim connection holes 63 and 64, and one of the cleaning water flowing in from the rim connection hole 63 is pushed through the bottom surface opening 61. The water is discharged from the washing water outlet 7 toward the bowl bottom surface 2a in the vicinity of the drainage channel inlet 4a, and one is discharged from the first water outlet 11 after passing through the water passage 63a. Further, the wash water flowing in from the rim connection hole 64 is discharged from the second water discharge port 12 after passing through the water passages 64a, 65, 66, and the wash water discharged from both the water discharge ports 11, 12 is one swirl flow. It reaches all over the filth receiving surface 5.

  Next, a second embodiment of the present invention will be described with reference to FIGS. 4 is a plan view showing a flush toilet according to the second embodiment of the present invention, FIG. 5 is a longitudinal sectional view of the flush toilet shown in FIG. 4, and FIGS. 6 (a) to 6 (e) are respectively FIG. It is the fragmentary sectional view seen along the AA to EE line. Regarding the second embodiment, the same parts as those of the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

In this second embodiment, the indentation washing water spout 7 is opened above the water surface of the water reservoir, and the washing water is spouted in the direction in which the filth, especially the filth floating on the water surface, is pushed into the drainage channel 4. Like to do.
The structures of the water passages 7a, 63a, 64a and the first and second water discharge ports 11, 12 are the same as those in the first embodiment.

  Next, a third embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a plan view showing a flush toilet according to the third embodiment of the present invention, FIG. 8 is a longitudinal sectional view of the flush toilet shown in FIG. 7, and FIGS. It is the fragmentary sectional view seen along the AA line-DD line. Regarding the third embodiment, the same parts as those of the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.

In this 3rd Embodiment, the zest hole 8 which pushes a filth into a drainage channel efficiently in the location facing the drainage channel inlet 4a is provided.
Furthermore, in the third embodiment, the water conduit 3 is divided into an upper water conduit 30a and a lower water conduit 30b by the partition wall 34, and the wash water from the water supply source is supplied to the lower water conduit through the opening 35 formed in the partition wall 34. The partition wall 34 prevents the siphon from being delayed due to the air in the water conduit being caught in the wash water. The upper water conduit 30 a communicates with a water passage 64 a that supplies cleaning water to the second water outlet 12, and the lower water conduit 30 b includes a water passage 63 a that supplies cleaning water to the first water outlet 11 and the jet holes 8. It communicates with a water passage 36 for supplying washing water to the water. The washing water supplied into the lower water conduit 30 b is discharged from the jet hole 8 through the water passage 36.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. FIG. 10 is a plan view showing a flush toilet according to a fourth embodiment of the present invention, FIG. 11 is a longitudinal sectional view of the flush toilet shown in FIG. 10, and FIGS. It is the fragmentary sectional view seen along the AA line-DD line. Regarding the third embodiment, the same parts as those of the above-described third embodiment are denoted by the same reference numerals, and description thereof is omitted.
In the fourth embodiment, similarly to the first embodiment, the inside of the water conduit is not divided into upper and lower parts, and the cleaning water is fed into the water passages 36 that supply the cleaning water to the water passages 63a and 64a and the jet holes 8. ing.

Next, a fifth embodiment of the present invention will be described with reference to FIGS. 13 is a plan view showing a flush toilet according to a fifth embodiment of the present invention, FIG. 14 is a longitudinal sectional view of the flush toilet shown in FIG. 13, and FIGS. 15 (a) to 15 (d) are respectively shown in FIG. It is the fragmentary sectional view seen along the AA line-DD line. Regarding the fifth embodiment, the same parts as those of the above-described fourth embodiment are denoted by the same reference numerals, and description thereof is omitted.
In the fifth embodiment, the wash water supplied from the supply water source is partly branched by the rim connection holes 63 and 67 provided on the left and right at the front part of the water conduit 3, and the water that has entered the rim connection hole 63 is washed with water. The water that has entered the rim connecting hole 67 turns counterclockwise in a plan view of the toilet.

  The water that has entered from the rim connection hole 63 passes through the water passage 63a and is then discharged counterclockwise from the first water outlet 11 to the filth receiving surface 5 in a plan view. In addition, the water entering from the rim connecting hole 67 passes through the water passage 67a, then makes a U-turn at the tip of the partition wall 68, and passes through the water passage 67b to the filth receiving surface 5 from the second water outlet 12 in a plan view of the flush toilet. Released counterclockwise. By doing so, the path through which the water in the rim 6 passes is shortened, which is effective in preventing condensation.

Further, the air in the water passages 63a, 67a, 67b to the first and second water discharge ports 11, 12 and the water passage 36 to the jet hole 8 is replaced early with cleaning water during the water introduction. As a result, the air is not compressed in the water passage. For this reason, the energy loss of the water flow of the cleaning water can be reduced, which is advantageous for noise reduction during cleaning.
Furthermore, since the water passage structure of the rim is simple, the water that continues to be discharged little by little from the water outlet to the filth receiving surface over a long period of time is reduced by providing a gradient in the direction of gravity in the water passages 63a, 67a, 67b. In addition, it is possible to suppress scale stains that are formed in the shape of vertical streaks on the dirt receiving surface.

Next, a sixth embodiment of the present invention will be described with reference to FIGS. 16 is a plan view showing a flush toilet according to a sixth embodiment of the present invention, FIG. 17 is a longitudinal sectional view of the flush toilet shown in FIG. 16, and FIGS. 18 (a) to 18 (d) are respectively shown in FIG. It is the fragmentary sectional view seen along the AA line-DD line. Regarding the sixth embodiment, the same parts as those of the above-described fifth embodiment are denoted by the same reference numerals, and description thereof is omitted.
In the sixth embodiment, rim connection holes 69 and 70 are provided on the left and right sides of the upstream portion near the opening 3 a of the water conduit 3, and the wash water supplied from the supply water source is partly by these rim connection holes 69 and 70. Crossed. Water that has entered from the rim connection hole 69 passes through the water passages 69a and 69b, and is then discharged counterclockwise from the first water outlet 11 to the filth receiving surface 5 in a plan view of the flush toilet.
Further, water entering from the rim connection hole 70 is discharged counterclockwise in the plan view of the flush toilet from the second water outlet 12 to the filth receiving surface 5 through the water passages 70a, 70b and 70c.
Also in this embodiment, air in the water passages 36, 70a, 70b, 70c is replaced with washing water at an early stage and is discharged from the first and second water discharge ports 11, 12 during the water introduction. Is no longer compressed. For this reason, the energy loss of the water flow of the cleaning water can be reduced, which is advantageous for noise reduction during cleaning.

Next, a seventh embodiment of the present invention will be described with reference to FIGS. 19 is a front view showing a flush toilet equipped with a wash water tank according to a seventh embodiment of the present invention, and FIG. 20 is a plan view of FIG.
The seventh embodiment has the same basic structure as the fifth embodiment described above (see FIGS. 13 to 15), but includes a water-saving washing water tank (6L to 8L) and a shelf. The difference is that the width and the inclination of each of the two are changed along the flow of the swirling flow. Hereinafter, these matters will be specifically described.

  As shown in FIGS. 19 and 20, the flush toilet is provided with a water-saving washing water tank (6 L to 8 L) 70. The washing water tank 70 is a washing water tank called a low silhouette, and has a lower water head pressure than a general one. The flush water tank 70 is a so-called one-piece toilet that is formed integrally with the flush toilet. For this reason, the opening 70 a formed below the washing water tank 70 also serves as the opening 3 a of the water conduit 3.

  In this embodiment, the shelf 6c of the bowl portion refers to a horizontal region where the inclination is gentler than that of the filth receiving surface 5, and the washing water from the first and second outlets 11 and 12 is received as filth. This is a path for turning above the surface 5, which means a portion that is inclined downward and has an inclination angle θ in the range of 0 to 15 degrees downward. Become.

  FIG. 21 is a plan view (tank not shown) in which the position of the bowl portion (shelf portion) of the seventh embodiment is indicated by arbitrary positions # 0 to # 17, and FIGS. ) Is a partial cross-sectional view of the bowl portion including the shelf portion seen at an arbitrary position, and FIG. 23 shows the shelf width, which is the width of the shelf portion in the seventh embodiment, along the positions of # 0 to # 17. FIG. 24 is a diagram showing the curvature radius of the curved surface between the shelf and the filth receiving surface in the seventh embodiment along the positions of # 0 to # 17, and FIG. 25 is the seventh embodiment. It is the top view which showed a mode that the swirling flow by a form flows along the position of # 0- # 17.

In FIG. 21, the position of the shelf 6c is indicated by # 0 to # 17. The position of each position is arbitrary, the position of the first water outlet 11 is # 0 (= # 18), the position of the second water outlet 12 is # 13, the position of the front end of the bowl is # 6, the bowl portion The position of the rear end portion is shown as # 15.
Here, before explaining the shape of the shelf, the arrangement positions of the first and second water discharge ports 11 and 13 will be described with reference to FIG. The bowl portion 2 (shelf portion 6c) has a substantially elliptical shape, and the left side and the right side are symmetrical when viewed from the front. In general, the regions # 17 to # 4 and # 8 to The radius of curvature is relatively large in the region # 12, while the radius of curvature is relatively small in the regions # 4 to # 8 and the region # 12 to # 17.

  If the arrangement positions of the first and second water discharge ports 11 and 12 are described in relation to the size of the radius of curvature of the bowl portion 2, the first water discharge port 11 is located on one side with respect to the front-rear direction of the bowl portion. It is arranged in the vicinity (# 0) of the position (# 17) where the bowl portion on the left side (left side in FIG. 21) changes from a small radius of curvature to a large radius of curvature (# 0). It is arranged in the vicinity (# 13) of the position (# 12) where the radius of curvature of the bowl portion on the (right side) changes from a large curvature radius to a small curvature radius.

  In the present embodiment, by arranging the first and second water discharge ports 11 and 12 at these positions, the wash water discharged from the first water discharge port 11 causes one side (left side) of the bowl portion. The region with a large radius of curvature (# 0 to # 4), the region with a small radius of curvature at the front end (# 4 to # 8), and the region with the large radius of curvature (# 8 to # 12) on the other side (right side) are cleaned. The remaining region (# 13 to # 0) having a large radius of curvature at the rear end is cleaned with the cleaning water discharged from the second water discharge port 12. Thus, according to this embodiment, the whole area | region of a bowl part can be wash | cleaned effectively.

  Next, the shelf width (W), which is the width of the shelf, will be described with reference to FIGS. In this embodiment, on the premise that the entire surface of the bowl portion can be cleaned, the main flow portion (indicated as “A” in FIG. 25) of the cleaning water discharged from the first water discharge port 11 is further advanced. The shelf width W of the shelf portion 6c of the bowl portion 5 is changed so as to flow toward the inlet 4a of the drainage channel 4, that is, it is wide on both sides (left and right sides) around the front and rear direction of the bowl portion, The front end region is formed to be narrow. In this way, by reducing the shelf width, the amount of cleaning water flowing from the shelf portion to the bowl portion (filtrate receiving surface 5) is increased, and by increasing the shelf width, it becomes difficult for the cleaning water to flow to the bowl portion, thereby causing a swirling flow. As a result, it continues to flow downstream.

  Specifically, as shown in FIGS. 22 and 23, at # 0, the shelf width W0 is 30 mm, at # 4, the shelf width W4 is 26 mm, at # 6, the shelf width W6 is 22 mm, and # 11 The shelf width W11 is 27 mm, the shelf width W12 is 16 mm at # 12, the shelf width W15 is 15 mm at # 15, and the shelf width W18 is 5 mm at # 18.

  Overall, as shown in FIG. 23, the shelf width W becomes wider in the region (# 0 to # 3) where the radius of curvature is large from the first water outlet 11 toward the downstream side, and the radius of curvature is increased. In the portion where becomes small, it gradually decreases toward the front end (# 6) position, and becomes the narrowest in the vicinity region (# 5 to # 7) of the front end. Furthermore, it becomes larger toward the downstream side, becomes wider in a region (# 9 to # 11) where the radius of curvature is large, and suddenly becomes narrow just before the second water outlet 12. Further, the shelf width W is abruptly narrowed in the region (# 13 to # 18) downstream from the second water outlet 12. Here, in the present embodiment, the shelf width is narrowed immediately upstream of the second water outlet 12, and the shelf width is narrowed immediately upstream of the first water outlet 11, so that the wash water from the upstream and each The water splash generated by the contact with the cleaning water discharged from the water discharge port (the cleaning water flies in a substantially vertical direction) is surely prevented.

  Next, as shown in FIG.22 and FIG.24, in this embodiment, in order to set the shelf width of the shelf to an appropriate value and control the flow of cleaning water including the swirling flow, the shelf 6c and The curvature radius R of the curved surface between the filth receiving surfaces 5 is changed along the position of the shelf. Specifically, as shown in FIG. 24, the position of the shelf and the radius of curvature R of the curved surface between the shelf and the filth receiving surface are downstream from the position (# 0) of the first spout 11. It is formed so as to increase toward the bottom, to become maximum in the downstream area (# 6 to # 11) from the front end position of the bowl portion, and to decrease toward the downstream area.

That is, in the present embodiment, the radius of curvature R of the curved surface between the shelf and the filth receiving surface is set to another region in the region (# 6 to # 11) downstream from the front end position of the bowl portion. In comparison, by setting a large value, the inclination angle is increased downward and the portion larger than 15 degrees is increased to narrow the shelf width, and in that region, the washing water is transferred from the shelf portion to the bowl portion (dirt receiving surface). This makes it easy to flow, so that the entire surface of the bowl can be reliably washed, and the main flow portion A of the wash water discharged from the first water discharge port 11 can easily flow toward the inlet 4a of the drainage channel 4. It is.
In addition, you may make it comprise between a shelf width 6c and the filth-receiving surface 5 by connecting a plane, without forming it in a curved surface.

Next, referring to FIG. 26 and FIG. 27, the rim water discharge amount (R1) discharged from the first water discharge port 11 and the water discharge from the second water discharge port 12 in the embodiment of the flush toilet equipped with the wash water tank of the present invention. The rim water discharge amount (R2), the jet water discharge amount (Z) discharged from the jet hole 8, the distribution ratio between the rim water discharge amount R (= R1 + R2) and the jet water discharge amount Z will be described. FIG. 26 is a diagram showing a cleaning limit A, a transport limit B, a performance limit D, and the like in the embodiment of the flush toilet equipped with the cleaning water tank of the present invention, and FIG. 27 includes the cleaning water tank of the present invention. It is a diagram which shows the range of the rim water discharge amount and zette water discharge amount in embodiment of a flush toilet.
Here, FIGS. 26 and 27 show data (experimental results) obtained when cleaning is performed using only the cleaning water stored in the cleaning tank in a state where the water is formed in the bowl portion. ing.

A flush toilet generally has a wash limit A, a transport limit B, and a performance limit D, and a flush toilet using a swirl flow further has a water splash limit E, which needs to satisfy these limit values. is there.
These limit values will be described in comparison with the flush toilet (tank capacity 6L) according to the present embodiment and the flush toilet according to the prior art (tank capacity 6L for discharging water from a large number of holes provided in the box rim).

  The cleaning limit A is a limit value for the rim cleaning water to wash the ball part once, in other words, the limit value of the rim water discharge amount that allows the rim cleaning water to wet the entire surface of the ball. As shown in FIG. 26, the cleaning limit A was 1.3 L in the prior art, but in this embodiment, it is 0.5 L (= R1 + R2), which is a smaller rim water discharge amount.

The transport limit B is a limit value of the amount of rim water discharged that can drop substitute filth on the ball and transport it to the drainage channel (trap) with rim washing water. Specifically, 40 g of substitute filth is dropped on the trash receiving surface. This is the limit value of the rim water discharge amount that can be moved to the water reservoir by the rim cleaning water.
The substitute filth is approximated to stool when the health condition is normal, and the hardness (hardness) based on solid matter composed of water, organic matter and ash, which is 80% or more of the stool The form is adjusted.

As shown in FIG. 26, the conveyance limit B was 1.8 L in the conventional technique, but in this embodiment, it is 1.0 L (= R1 + R2), which is a smaller rim water discharge amount.
The performance limit C is a limit value of the amount of jet water discharged so that the substitute filth is properly discharged. As shown in FIG. 26, this performance limit C is 3.0 L in both of the present embodiment and the prior art.
The water jump limit E is a limit value of the amount of rim water discharged from the rim, in which the wash water jumps out in a substantially horizontal direction (in particular, the wash water jumps out from the front end of the toilet bowl). The water splash does not occur in the prior art which is a type of water discharged from a large number of holes provided in the box rim, and is applied only to this embodiment using a swirling flow. As shown in FIG. 26, the limit value of water jump is determined for each rim water discharge amount, and in this embodiment is 2.3L (water discharge amount R1 of the first water discharge port).
FIG. 26 shows a flush toilet having a rim water discharge amount R (= R1 + R2) of 2.0 L and a jet water discharge amount Z of 4.0 L as Example C of this embodiment. The toilet bowl satisfies all the limits of the cleaning limit A, the transport limit B, the performance limit D, and the water splash limit E.

FIG. 27 is a diagram showing the relationship between the rim water discharge amount and the jet water discharge amount, the transport limit B, the performance limit D, and the water jump limit E.
As shown in FIG. 27, in the prior art, the jet water discharge amount is 3.0 L or more of the performance limit D ′, and the rim water discharge amount R is 1.8 L or more of the conveyance limit B ′. On the other hand, in this embodiment, the jet water discharge amount is 3.0 L or more of the performance limit D, and the rim water discharge amount R (= R1 + R2) is 1.0 L or more of the conveyance limit B. Further, the rim water discharge amount R1 (or R2) is less than 2.3 L of the water splash limit E. FIG. 27 also shows values of the rim water discharge amount R and the jet water discharge amount Z that can be taken by the embodiment C having a tank capacity of 6L.

  As described above, in the present embodiment, the conveyance limit B can be reduced from the conventional 1.8L to 1.0L, so that the washing water can be saved correspondingly, and the water-saving tank ( Tank capacity 4-6L) can be used. In addition, in the case of the same tank capacity (for example, 6 L), the amount of jet water discharged can be increased, so that siphon can be generated early, and waste can be effectively washed out. it can.

In the present embodiment, as shown in FIG. 26, the distribution (ratio) between the rim water discharge amount R and the jet water discharge amount Z is (17%: 83%) to (50%: 50%) when the tank capacity is 6L. By setting to the range, it is possible to satisfy both the transport limit B and the performance limit D.
Furthermore, in this embodiment, with respect to the rim water discharge amount R, the water discharge amount R1 discharged from the first water discharge port 11 is larger than the water discharge amount R2 discharged from the second water discharge port 12. As shown, the size of the opening is set. The distribution (ratio) of the water discharge amount R1 and the water discharge amount R2 is set to be substantially proportional to the distance of the swirling flow from each water discharge port to the next water discharge port.
In this embodiment, since the 1st spout 11 and the 2nd spout 12 are arrange | positioned in the preferable position mentioned above, in rim water discharge R, distribution (ratio) of water discharge R1 and water discharge R2 is , (55%: 45%) to (70%: 30%) is preferable.

  Next, an eighth embodiment of the present invention will be described with reference to FIG. FIG. 28 is a longitudinal sectional view showing a hybrid flush toilet according to an eighth embodiment of the present invention.

  The eighth embodiment has the same basic structure as the seventh embodiment described above, but the cleaning water to the first and second outlets is supplied from the water pipe, while the cleaning water to the jet hole is cleaned. The difference is that the cleaning water in the water tank is supplied. Hereinafter, these matters will be specifically described.

As shown in FIG. 28, the flush toilet of the present embodiment includes a washing water tank 80, and the washing water to the first water outlet 11 and the second water outlet 12 is supplied from the water pipe, The cleaning water stored in the cleaning water tank 80 is supplied to the cleaning hole 8.
An opening 3 a is formed at the bottom of the washing water tank 80, and this opening 3 a is opened and closed by a ball-shaped drain valve 82. The drain valve 82 is connected to the electric motor 86 by a chain 84. When the washing switch 87 is operated, the electric motor 86 is driven to raise the drain valve 82 and guide the washing water in the washing water tank 80. The water can be supplied to the jet hole 8 via the water channel 3 and the water channel 36. The drain valve 82 is connected to a float (not shown) and opens the opening 3a until the water level in the washing water tank 80 becomes a predetermined level or less.

A water pipe 88 is inserted into the washing water tank 80. The water pipe 88 branches into a first branch pipe 90 and a second branch pipe 92 inside the tank, and electromagnetic valves 94 and 96 are provided respectively. It has been. The first branch pipe 90 opens in the washing water tank 80 and supplies tap water into the tank, while the second branch pipe 92 is connected to the rim holes 63 and 67, respectively, and tap water is supplied to the water pipe 88. Is supplied directly to the first and second water discharge ports 11 and 12.
Further, the flush toilet is provided with a control device 98, and a detection signal that detects the operation of the operation switch 87 is input to the control device 98, and on the basis of this, the electromagnetic valves 94 and 96 are operated to open and close these electromagnetic valves. An operation signal for performing the operation and a drive signal for the electric motor 86 are output. Specifically, when the operation switch 87 is operated after using the toilet bowl, first, the electromagnetic valve 96 is opened, and the tap water from the water pipe 88 passes through the second branch pipe 92 as the wash water to the first and It is supplied to the second water outlets 11 and 12. Next, a few seconds later, the electric motor 86 is driven and the drain valve 82 is raised, so that the cleaning water in the cleaning water tank 80 is supplied to the jet hole 8 and siphon action occurs, and the filth is discharged. Is done. Thereafter, the water level in the cleaning tank 80 is lowered, the drain valve 82 closes the opening 3a, and then the water storage surface required for sealing is formed in the bowl portion by the cleaning water supplied from the second branch pipe 92, Thereafter, the electromagnetic valve 96 is closed, and the electromagnetic valve 94 is further opened to store the cleaning water in the empty cleaning water tank 80.
In the flush toilet shown in FIG. 28, instead of the electromagnetic valve 94, a ball tap valve that mechanically turns on / off water discharged from the first branch pipe 90 according to the water level in the washing water tank 80 may be used. .

  Although the eighth embodiment has basically the same function and effect as the seventh embodiment described above, the eighth embodiment is a hybrid flush toilet. Since the tap water is supplied directly from the water pipe to the first and second water outlets 11 and 12, the wash water tank 80 can be further downsized. Further, all of the cleaning water in the cleaning water tank is supplied to the jet hole 8, and the cleaning water is supplied to the jet hole 8 by supplying the cleaning water to the first and second spouts 11, 12. Since the operation is performed after the stored water in the section is swirled, the siphon action can be reliably generated even if the amount of the washing water in the tank is small.

  Moreover, in this embodiment, since the control apparatus 98 can control each timing and water discharge amount (distribution ratio) of the rim water discharge from the 1st and 2nd water discharge ports 11 and 12 and the jet water discharge from the jet hole 8. The water discharged from the jet hole 8 may be performed simultaneously with the water discharged from the first and second water discharge ports 11 and 12.

Next, a ninth embodiment of the present invention will be described with reference to FIGS. FIG. 29 is a longitudinal sectional view showing a direct water pressure type flush toilet according to a ninth embodiment of the present invention, and FIG. 30 is a diagram showing timings of rim water discharge and jet water discharge in the flush toilet according to the ninth embodiment.
The ninth embodiment has the same basic structure as the seventh embodiment and the eighth embodiment described above, but both the cleaning water to the first and second spouts and the cleaning water to the jet hole are water pipes. The point that is supplied from is different. Hereinafter, these matters will be specifically described.

  As shown in FIG. 29, the directly flushed flush toilet according to this embodiment includes a flush water control device 102 for supplying flush water to the toilet from a plumbing pipe 100 that is a water supply source. The washing water control apparatus 102 is first provided with a constant flow valve 104 that is arranged at a connection portion with the water pipe 100 and cancels fluctuations in the feed water pressure to maintain a constant flow rate. Even if the water supply pressure of the water supply pipe 100 fluctuates by the constant flow valve 104, the flow rate of the cleaning water supplied to the first and second rim water discharge parts 11 and 12 and the jet hole 8 is always a predetermined constant flow rate. It becomes.

  In the cleaning water control apparatus 102, the downstream side of the constant flow valve 104 is branched into a rim pipe 106 and a jet pipe 108. The rim pipe 106 and the jet pipe 108 are respectively connected to the rim pipe 106 and the jet pipe 108. Motorized valves 110 and 112 for opening and closing the flow path are provided. These motor-operated valves 110 and 112 are controlled in their opening / closing timing.

The rim pipe 106 further branches into a first rim pipe 106a and a second rim pipe 106b on the downstream side. The first rim pipe 106a supplies cleaning water to the first water outlet 11 via a first rim water passage 114 provided in the toilet body and formed by piping, while the second rim pipe 106b is Wash water is supplied to the second water outlet 12 via a second rim water passage 116 provided in the toilet body and formed by piping.
Moreover, the pipe 108 for jets supplies cleaning water to the jet hole 8 through the jet water passage 118 provided in the toilet body and formed by the pipes.
Further, a cleaning switch (not shown) is provided.

Next, the content of the timing control of the rim water discharge and the jet water discharge by the cleaning water control apparatus of the ninth embodiment will be described.
In FIG. 30, the solid line indicates the flow rate of the rim water discharge due to the opening and closing of the electric valve 110 of the rim pipe 106, and the chain line indicates the flow rate of the jet water discharge due to the opening and closing of the electric valve 112 of the jet pipe 108.
As shown in FIG. 30, when there is a water supply command by the cleaning switch, at time t0, the electric valve 110 of the rim pipe 106 is opened and water is discharged from the first and second water discharge ports 11 and 12 at a predetermined flow rate. I do. This state is maintained for a predetermined time, and the filth in the bowl portion 2 is dropped into the stored water. After the stored water is swirled, the motor-operated valve 104 is closed at the time t1, and at the same time, the motor-operated valve 112 of the jet pipe 108 is used. By opening the valve, water is discharged from the jet hole 8 at a predetermined flow rate. The filth is discharged by siphon action by the water discharged from the jet hole 8, but when water is discharged from the jet hole 8 for a certain period of time, the opening of the motor-operated valve 112 is slightly reduced at time t2 to reduce the flow rate to a predetermined flow rate. The motor-operated valve 110 is slightly opened in order to use the reduced flow rate for rim water discharge. Thereafter, at time t3 when a predetermined time has elapsed, the motor-operated valve 112 is closed and the motor-operated valve 110 is fully opened, and water discharge from the first and second water discharge ports 11 and 12 is resumed. At time t4 when rim water discharge (bowl water supply) at a predetermined flow rate is continued for a predetermined time, the motor-operated valve 110 is closed and a series of cleaning operations is completed.

In the above-described timing control of the rim water discharge and the jet water discharge in the ninth embodiment, the water discharge (overlap) is also discharged from the first and second water discharge ports 11 and 12 immediately before the time of the water discharge from the jet hole 8 (time t3). In this way, the filth on the filth receiving surface at the beginning of the water discharge from the jet hole 8 is washed with the water discharged from the first and second water discharge ports 11 and 12 and discharged out of the toilet bowl by siphon action. Like to do.
However, the ninth embodiment is not limited to this, and there is no overlap between the rim water discharge and the jet water discharge. The water supply from the rim pipe 106 → the water supply from the zette pipe 108 → the rim pipe 106 It may be a water discharge pattern such as water supply. Further, the water discharged from the jet hole 8 may be performed simultaneously with the water discharged from the first and second water discharge ports 11 and 12.

  The ninth embodiment can achieve the same effects as the seventh and eighth embodiments described above. In addition to this, since it is a water direct pressure flush toilet, there is no need for a wash water tank, so it is possible to provide a flush toilet with a compact appearance, and freely set the timing of rim water discharge and jet water discharge. Since the water supply can be controlled, more efficient cleaning can be performed. In addition, since the two rim spouts are provided even when the tap water pressure is low, there is also an effect that the cleaning can be performed reliably even when the tap water has a low water pressure.

  FIG. 31 is a partial cross-sectional view showing another example of the rim portion of the flush toilet of the above-described embodiment of the present invention. In the flush toilet of the above-described embodiment of the present invention, as shown in FIG. 2 and the like, the inner peripheral surface 6a of the rim 6 extends obliquely inward to form an overhang shape of the rim 6. In the first to ninth embodiments, not limited to this, as shown in FIG. 31, the lower surface 6b of the rim 6 may extend inward in the horizontal direction to form an overhang shape of the rim 6.

  As described above, according to the flush toilet of the present invention, the wash water sufficiently reaches the end portion of the swirling flow, so that the bowl portion can be effectively washed and the filth can be discharged.

FIG. 1 is a plan view showing a flush toilet according to a first embodiment of the present invention. FIG. 2 is a longitudinal sectional view of the flush toilet shown in FIG. 3A to 3E are partial cross-sectional views taken along lines AA to EE in FIG. 1, respectively. FIG. 4 is a plan view showing a flush toilet according to a second embodiment of the present invention. FIG. 5 is a longitudinal sectional view of the flush toilet shown in FIG. 6A to 6E are partial cross-sectional views taken along lines AA to EE in FIG. 4, respectively. FIG. 7 is a plan view showing a flush toilet according to a third embodiment of the present invention. FIG. 8 is a longitudinal sectional view of the flush toilet shown in FIG. 9A to 9D are partial cross-sectional views taken along lines AA to DD in FIG. 4, respectively. FIG. 10 is a plan view showing a flush toilet according to a fourth embodiment of the present invention. FIG. 11 is a longitudinal sectional view of the flush toilet shown in FIG. 12A to 12D are partial cross-sectional views taken along lines AA to DD in FIG. 4, respectively. FIG. 13 is a plan view showing a flush toilet according to a fifth embodiment of the present invention. 14 is a longitudinal sectional view of the flush toilet shown in FIG. FIGS. 15A to 15D are partial cross-sectional views taken along lines AA to DD in FIG. 13, respectively. FIG. 16 is a plan view showing a flush toilet according to a sixth embodiment of the present invention. 17 is a longitudinal sectional view of the flush toilet shown in FIG. FIGS. 18A to 18D are partial cross sections viewed along lines AA to DD in FIG. 16, respectively. FIG. 19 is a front view showing a flush toilet equipped with a flush water tank according to a seventh embodiment of the present invention. FIG. 20 is a plan view of FIG. FIG. 21 is a plan view (tank not shown) in which the position of the bowl (shelf) of the seventh embodiment of the present invention is indicated by arbitrary positions # 0 to # 17. 22A to 22F are partial cross-sectional views of a bowl portion including a shelf portion viewed at an arbitrary position. FIG. 23 is a diagram showing the shelf width, which is the width of the shelf in the seventh embodiment of the present invention, along the positions # 0 to # 17. FIG. 24 is a diagram showing the radius of curvature of the curved surface between the shelf and the filth receiving surface in the seventh embodiment of the present invention along the positions # 0 to # 17. FIG. 25 is a plan view showing the flow of the swirling flow according to the seventh embodiment of the present invention along the positions # 0 to # 17. FIG. 26 is a diagram showing a cleaning limit A, a transport limit B, a performance limit D, and the like in the flush toilet according to the embodiment including the cleaning water tank of the present invention. FIG. 27 is a diagram showing ranges of the rim water discharge amount and the jet water discharge amount in the embodiment including the cleaning water tank of the present invention. FIG. 28 is a longitudinal sectional view showing a hybrid flush toilet according to an eighth embodiment of the present invention. FIG. 29 is a longitudinal sectional view showing a direct water pressure type flush toilet according to a ninth embodiment of the present invention. FIG. 30 is a diagram showing the timing of rim water discharge and jet water discharge in the flush toilet according to the ninth embodiment. FIG. 31 is a partial cross-sectional view showing another example of the rim portion of the flush toilet according to the embodiment of the present invention.

Explanation of symbols

2 Bowl part 4 Drainage path 5 Soil receiving surface 6 Rim 6c Shelf part 11 1st water outlet 12 2nd water outlet 63a, 64a, 65, 66 Water passage 67a, 67b, 69a, 69b, 70a-70c Water passage 70 Wash water tank

Claims (6)

A flush toilet that flushes toilets with wash water stored in a wash water tank and discharges filth,
A bowl-shaped filth receiving surface, a rim portion that is an upper edge and whose inner peripheral surface overhangs inward, and a shelf portion formed between the rim portion and the filth receiving surface. The bowl part,
A drainage channel where the inlet is connected to the bottom of the bowl portion and discharges filth,
A first water discharger that discharges wash water onto the shelf of the bowl part to form a swirling flow;
A second water discharger for discharging wash water in the same direction as the swirl direction of the swirl flow on the shelf of the bowl part;
A forced washing water spouting part for discharging washing water in a direction for pushing filth into the drainage channel;
A first water passage for supplying wash water from the wash water tank to the first water discharge unit;
A second water passage for supplying wash water from the wash water tank to the second water discharger;
A third water passage for supplying wash water from the wash tank to the forced wash water spouting unit ,
The first water spouting portion is disposed in the vicinity of the position where the bowl portion on one side changes from a small radius of curvature to a large radius of curvature with the longitudinal direction of the bowl portion as a center, and the second water spouting portion is the other side. A flush toilet, which is disposed in the vicinity of a position where the large radius of curvature of the bowl portion on the side changes from a small radius of curvature to a small radius of curvature.   The flush toilet according to claim 1, wherein the second water passage is U-turned and communicated with the second water discharger.   The flush toilet according to claim 1 or 2, wherein a rim water discharge amount discharged from the first water discharge portion is larger than a rim water discharge amount discharged from the second water discharge portion.   The shelf portion of the bowl portion is formed so that the width thereof changes so that the main flow portion of the wash water discharged from the first water discharge portion flows toward the inlet of the drainage channel. The flush toilet according to any one of the above.   5. The flush toilet bowl according to claim 4, wherein the shelf of the bowl portion is formed to have a wide width in both side regions centering on a front-rear direction of the bowl portion and narrow in a front end region of the bowl portion.   The flush toilet bowl according to any one of claims 1 to 5, wherein the shelf portion of the bowl portion is inclined downward and an inclination angle thereof is in a range of 0 to 15 degrees downward.

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