JPH07324367A - Flush toilet - Google Patents

Abstract

PURPOSE:To save water by specifying the bowl part longitudinal wall space of a water storing part and the flushing water main flow quantity, and forming each part into a prescribed form. CONSTITUTION:Sixty-seventy percents of flushing water is discharged from a main flow discharge hole 7 to generate a turning flow, and the residue is discharged from a rim water discharge hole 11. Since the upper part of the water storing surface of a bowl 2 is narrowed, the level rise necessary for siphon generation is early attained with a little water quantity, and the turning main flow is efficiently run into the inlet port 31 of a draining trap 3 by a guide 8. The bowl part longitudinal wall space of the water storing part is set as narrow as 60-90mm, and the water pressure in the inlet port 31 is increased to enhance the force for pushing the flushing water into the trap 3. The lower edge of a trap top part 34 is made into a horizontal form having the same width as the trap 3 to increase the instantaneous flow rate. The water overflowing the top part 34 is peeled from the trap wall surface by a flushing water peeling part 4 to early fill a descending passage 33 with water. Thus, the siphon can be started early with a little water quantity, and the flushing effect can be enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flush toilet bowl, and more particularly to a flush toilet bowl of the type that uses a siphon action to discharge dirt.

[0002]

2. Description of the Related Art Conventionally, as a flush toilet of this type, a flat crescent-shaped stepped surface is provided on the descending path of a drain trap, and the downstream side of the stepped surface is eccentric to the ascending path side. Filling the upstream side quickly and using a small amount of water to surely raise the siphon to save water and smoothly discharge filth
Many things are known including the thing of the -97473 publication.

[0003]

However, in all the conventional ones, since the wall surface of the top of the drain trap is continuous to the descending path as it is due to the smooth curved surface, there is still not much water that gets over the top of the drain trap at the initial stage of drainage. At the time, the water that has crossed over the top flows down from the top along the inner wall surface of the descending path and flows down on the surface opposite to the stepped surface and does not contribute to the siphon activation at all. As a result, the siphon start-up is delayed, and much water is wasted by that amount, and it cannot be said that sufficient water saving is achieved.

Further, in order to cause the siphon action by filling the descent path of the trap drainage channel with water, it is necessary to flow a certain amount of water at a time to the descent path. It is necessary for the water flowing into the passage to get over the trap top with a water level that has risen to at least half the inner diameter of the trap top. Since it has a gentle curved surface that spreads toward the upper end of the part, and its cross-sectional area increases upward, it is necessary for the water level to cause the siphon action as described above. A large amount of water is required to rise to the height, and it takes a long time, and naturally, a large amount of water is wasted during that time.

Further, in the conventional toilet bowl of this type, the cross-sectional shape of the drain trap is generally circular and the cross-sectional shape of the top is also circular. When the cross-sectional shape of the top of the drain trap is circular in this way, only a small amount of water can be made to flow to the descending passage for the width of the trap, and therefore it takes time for the descending passage to become full. The start-up of the siphon will be delayed, and more water will be wasted. Moreover, if the cross-sectional shape of the top of the drain trap is circular, the water that flows over the drain trap to the downflow will flow unevenly toward the center and only a small amount of water will flow to both sides, making it difficult to fill the downflow. .

The present invention has been made in view of the above problems of the prior art, and its object is to increase the cleaning effect by activating the siphon at an early stage to save water.

[0007]

In order to achieve the above object, the flush toilet of the present invention is, in claim 1, the boundary between the drain trap top and the drain trap descending passage, the inside of the trap continuing from the top to the descending passage. The cleaning water peeling portion is formed so as to rapidly change the shape of the wall surface.

Further, in the second aspect, the ball surface of the portion up to the position corresponding to the water level rise necessary for activating the siphon action is set upward from the position corresponding to the accumulated water surface of the ball portion as a reference. In some cases, the ball portion is raised in a nearly vertical state so that the cross-sectional area of the ball portion of the portion is not so different from the cross-sectional area of the ball portion at the position corresponding to the reservoir surface.

Further, in claim 3, the drain trap top has a cross-sectional shape having a height substantially corresponding to the lateral width of the trap, and the lower edge of the trap in the cross-section has a lateral width substantially the same as the lateral width of the trap. It is also formed into a shape that is almost horizontal.

Further, according to claim 4, the front side ball surface of the ball portion is formed to have a large rising angle so as to form a steep slope from a position slightly lower than the position corresponding to the reservoir surface to the bottom portion of the ball portion, and the ball portion and the ball portion. Distance between back wall is 60 to 90mm
It is also what

According to a fifth aspect of the present invention, a mainstream discharge port for discharging a large amount of cleaning water is provided above the position corresponding to the accumulated water surface of the ball portion in addition to the cleaning water for cleaning the ball, and the ball surface has the above-mentioned structure. A guide part is formed to efficiently guide the large amount of wash water discharged from the mainstream discharge port to the drain trap inlet. And 40% or more of the wash water supplied from the mainstream outlet to the toilet bowl from the water supply device, preferably
It is designed to release 60% to 70%. And these structures are implemented individually or in combination of 2 or more.

[0012]

In the flush toilet according to the first aspect of the present invention constructed as described above, the water that has passed the top of the drain trap is immediately separated from the inner wall of the trap that continues from the top to the descending path by the wash water separating section. .

Further, in the toilet bowl of the second aspect, the cross-sectional area of the ball portion continuous above the portion corresponding to the accumulated water surface is at least up to a position portion corresponding to the amount of rise in the water level required to cause the siphon action. The volume of water required to raise the siphon is small compared to a toilet bowl whose cross-sectional area is larger than the cross-sectional area of the water equivalent to the reservoir, as it is almost the same size as the ball cross-sectional area of the water equivalent Can be obtained at.

Further, in the flush toilet according to claim 3, the cross section of the top of the drain trap is not circular, and the lower edge of the trap in the cross section has a width substantially the same as the width of the trap, and most of it Is almost horizontal, the instantaneous flow rate of water flowing in the descending passage increases when the water level rise height is the same as in a drain trap with a circular cross section.

Further, in the flush toilet according to claim 4, the standing angle of the ball portion is formed so as to form a steep slope from the position slightly below the position corresponding to the accumulated water surface to the bottom of the ball portion. Since the distance between this part and the rear wall of the ball part is 60 to 90 mm compared to about 105 mm of the conventional toilet bowl, the water pressure per unit area becomes large and the water can be pushed out quickly into the drain trap descending path. Become.

Further, in the flush toilet according to claim 5, a large amount of wash water is discharged from the position above the position equivalent to the accumulated water surface of the ball portion, in addition to the wash water for ball washing, and this large flow rate washing is performed. Since the water is efficiently guided to the drain trap inlet by the guide portion, this acts on the siphon activation in the same manner as the zet flow in the siphon zette toilet.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. In the figure, A is a toilet bowl body, a ball portion 2 provided with a water passage rim 1 on the upper peripheral edge thereof, a trap inlet 31 opened adjacent to the ball portion 2 at a lower portion of a rear wall 21 of the bowl portion 2, and a toilet bowl body. The drainage trap 3 is formed so as to be connected to the outlet 32 opened at the bottom surface of A by bending in a substantially inverted U shape, and the descending path 33 of the drainage trap 3 is continuous with the ceiling of the top 34. It has the basic form of a conventionally known siphon-type flush toilet with a convex portion 35 formed on the wall surface.

In the siphon-type flush toilet having the above-described basic form, when wash water is supplied to the ball portion 2 from a wash water supply device (not shown) such as a low tank, this water flows into the drain trap 3 and From the ascending path 36, over the top portion 34 of the drain trap 3, through the descending path 33, the water is discharged from the outlet 32 to a drain pipe (not shown).
When the inside of 33 is filled with water, a siphon is triggered and the water in the ball portion 2 can be strongly sucked and discharged. The convex portion 35 provided in the descending path 33
Serves as a resistance against the water flowing down in the descending passage 33 and acts to fill the descending passage 33 with water at an early stage.

The rim water passage 1 is formed so as to project inward of the ball portion 2 and the bottom surface thereof is as desired in the ball portion 2.
This rim water passage 1 is connected to a water supply port 5 formed on the upper surface of the rear portion of the toilet body A on the center line that divides the toilet body A into left and right parts, via a water conduit 6 on the rear side of the ball portion 2. There is.

The above-mentioned water conduit 6 is separated from the center line that divides the toilet body A into left and right parts and branched to the left and right, one of which serves as a wash water conduit 61 and the other serves as make-up water conduit 62 for cleaning. It is formed so that water and makeup water are separately supplied to the rim water passage 1, and a baffle plate 63 is provided in the makeup water conduit 62 to wash most of the water supplied to the conduit 6. Water headrace 61
From the rim to the rim water passage 1.

In the rim water passage 1, a rim water discharge hole 11 is formed on the bottom surface over the entire circumference of the water passage 1.
At a position where 61 is slightly in the rim water passage 1 from the part that connects to the rim water passage 1, specifically, as close as possible to the water supply port 5, and at a position substantially above the inlet 31 of the drain trap 3, Instead of the rim water discharge hole 11, a mainstream discharge port 7 is opened.

The main outlet 7 is 40% or more, preferably 60 to 70%, of the washing water flowing from the water inlet 5 to the washing water conduit 61.
Has an opening area through which the water can be supplied from the mouth 7 into the ball portion 2, and is an elliptical hole long in the direction intersecting the flow of the wash water flowing from the wash water conduit 61 to the rim water passage 1. Is formed. The mainstream discharge port 7 is provided at a position as close to the water supply port 5 as possible in order to discharge the supplied washing water in the strongest possible state.

Therefore, a large amount of cleaning water is intensively discharged from the mainstream discharge port 7 as compared with the cleaning water ejected from the rim water discharge hole 11, and is discharged from the mainstream discharge port 7. The cleaning water to be discharged constitutes a main flow in the ball portion 2 for injecting filth into the drain trap inlet 31. Moreover, the washing water flowing into the rim water passage 1 has a directionality of flowing from the rear side to the front side of the water passage way 1, and the directionality from the mainstream discharge port 7 is kept depending on the size of the opening area. Since it is discharged into the ball portion 2 in the state of
A swirling flow is given to the accumulated water in the ball portion 2.

The mainstream discharge port 7 is shown in FIG. 1 and, in addition to being provided in the rim water passage 1 as described above, it is also provided in the ball surface above the water reservoir surface equivalent position a as shown in FIG. Although it is also possible, it is the easiest to provide the rim water passage 1 due to the structure and manufacturing of the toilet. Also,
As shown in FIG. 9, it is possible to form the water conduit 64 for supplying the wash water to the mainstream discharge port 7 and the water conduit 65 for supplying the rinse water to the rim water passage 1 in separate and independent passages. Furthermore,
The mainstream discharge port 7 may be formed in a shape other than the oval shape shown in the drawing, for example, a rectangular hole, or may be formed in a collection of circular holes having a diameter larger than that of the rim water discharge hole 11.

On the other hand, the ball portion 2 is formed so as to widen its cross-sectional area from the bottom portion to the upper portion, but the ball portion 2 has its front side ball surface slightly below the position a corresponding to the accumulated water surface. By forming a large upright angle to form a steep slope toward the bottom, the portion 22 and the rear wall of the ball portion are formed.
The distance w from 21 is configured to be 60 to 90 mm. Since the dimension w of this portion in the conventional flush toilet is about 105 mm, the dimension of 60 to 90 mm is considerably smaller than that of the conventional flush toilet.

As described above, the portion from the position slightly below the accumulated water level position a on the front side ball surface to the bottom of the ball portion
By making the distance w between the ball 22 and the ball rear wall 21 smaller than that of the conventional toilet bowl, the water pressure per unit area applied to the drain trap inlet 31 can be made larger than that of the conventional toilet bowl. The force of pushing the water into the trap 3 is strengthened, and the pressure causes the washing water to be promptly ejected from the trap top portion 34.
Up to the top 34 and down the drain trap 3
It can be swept away to 33, and the siphon can be activated faster by that amount. In addition, since the water pressure per unit area becomes large, the force to push the sewage into the drain trap also becomes large, and the flow velocity of the water flowing into the drain trap also becomes faster, which is effective for the discharge of floating sewage and The discharge capacity is improved.

If the dimension w between the portion 22 extending from a position slightly below the accumulated water level position a on the front side ball surface to the bottom of the ball portion 2 and the rear wall 21 of the ball portion is 60 mm or less, it is too narrow and filth. If the discharge is alienated and it is 90 mm or more, the effect of pushing the wash water into the drain trap 3 by the water pressure cannot be expected. Further, the reason why the portion 22 which is formed as a steep slope and reduces the distance dimension w from the rear wall 21 of the ball portion is below the position a corresponding to the reservoir surface is that the front ball surface is raised for the above-mentioned purpose. This is to prevent the accumulated water surface from becoming narrower, which prevents dirt from easily adhering to the ball surface.

Further, the ball portion 2 is a portion from the position corresponding to the accumulated water surface a to a position b upward from the position a to a position b corresponding to the amount of rise in the water level required to cause the siphon action.
23, specifically, a portion up to a position corresponding to a height equal to or more than half of the inner diameter of the drain trap top 34 is raised in a nearly vertical state, and the cross-sectional area of the portion 23 cuts off at the position a corresponding to the accumulated water surface. It is formed to have the same size as the area.

As described above, in order to activate the siphon, that is, in order to fill the descending passage 33 of the drain trap 3, the water flowing into the descending passage 33 is at least trap top 34.
It is necessary to climb over the trap top 34 with a water level that has risen to more than half the inner diameter of the trap. However, by forming the ball portion 2 in the above-described shape, the water level can be half the inner diameter of the trap drainage channel top 34 from the reservoir surface. Compared with the conventional toilet bowl, the amount of water required to rise to the position b corresponding to the above is expanded with a gently curved surface from the position a corresponding to the stored water surface to the upper end of the ball portion 2 and its cross-sectional area increases. Can be reduced. (See Figure 6)

Further, the ball portion 2 has a portion 22 from a position slightly lower than the water-sink-surface-corresponding position a formed on each of the front side ball surfaces to a bottom of the ball portion and a water-water-surface-corresponding position a as a reference. It is formed in such a shape that the portion 23 from the position to the position b corresponding to the amount of rise in the water level required to cause the siphon action is connected to the portion 24 formed on the curved surface having a gentle slope and a large curvature. , The entire shape of this front side ball surface, in particular, a portion having a generally step shape from the upper portion of the portion indicated by reference numeral 22 to the portion indicated by reference numeral 23 is a large amount of washing discharged from the mainstream discharge port. A guide portion 8 is provided that regulates the directionality of the swirling main flow generated in the accumulated water by the water and guides the main flow so as to dive toward the inlet 31 side of the drain trap 3.

Therefore, the main stream is efficiently guided to the inlet 31 of the drain trap 3 by the guide portion 8.
Since a large amount of vigorous water concentrates and flows into the drain trap 3, the drain trap 3 can be filled with water at an early stage, and the siphon can be started faster.

In addition to forming the guide portion 8 in a stepped shape as described above, as shown in FIG. 10, the side having the mainstream discharge port is based on the center line that divides the toilet body into left and right parts. Is formed in a wall shape projecting to the ball surface at a position near the front end on the opposite side and standing upright, and the direction of the swirling flow is restricted by colliding with the guide portion 8 formed in the wall shape. It is also possible to do it.

On the other hand, in the drain trap 3, the descending passage 33 is formed to have a substantially circular cross section, while the top portion of the drain trap 3 is formed as shown in FIG.
The cross-sectional shape of the portion 34 is formed by a semicircle having the same diameter as that of the descending path 33 and a pair of parallel vertical lines and a horizontal line connecting the lower ends of the vertical lines, and has a height and width equal to the diameter of the semicircle. It is formed in such a manner that the free ends of both of them are connected to each other by being combined with each other so as to face each other, and the horizontal line of the box portion is the lower edge of the trap 3 at the top portion 34.

As described above, the drain trap top 34 does not have a circular cross-sectional shape, has a height substantially corresponding to the lateral width of the trap 3, and the lower edge of the trap 3 in the cross section is the trap 3.
The width is almost the same as that of the drainage trap, and most of it has a horizontal shape. The amount of flowing water increases. (See Figure 7)

The cross-sectional shape of the drain trap top 34 is not limited to the shape shown in the figure, and the width is the same as or wider than that of the ascending path 36 and the descending path 33, and most of the lower edge is substantially horizontal. Even if the shape is a square shape, an elliptical shape, a track shape, or the like, the same effect as in the case of the above-described illustrated shape can be obtained.

Further, the drain trap 3 has a top portion 34 and a descending path.
At the boundary with 33, the trap inner wall surface continuing from the bottom wall 37 of the trap 3 at the top 34 to the descending path 33 is recessed in a stepwise manner to sharply change the shape of the inner wall surface of the trap 3 continuing from the top 34 to the descending path 33. The changed cleaning water separating portion 4 is formed, and the cleaning water that has passed over the top 33 is made to flow down into the descending path 33 apart from the inner wall surface of the trap 3 due to the abrupt change of the inner wall surface of the trap 3 in this cleaning water separating portion 4. It is like this.

As a result, the water flowing over the trap top 34 into the descending passage 33 is separated from the trap bottom wall 37 at the trap top 34, that is, the inner wall of the trap 3, and descends.
33 will flow down, and the stepped portion 35 provided on the wall surface continuous from the ceiling of the trap top 34, that is, on the outer wall of the trap 3.
It will contribute to filling the descent path 33 of the drainage trap 3 with water by hitting.

The cleaning water removing portion 4 may be formed in a stepped shape as described above, or may be formed in an inclined surface which is inclined downward toward the descending path 33 as shown in FIG. If the cross-sectional area of the drain trap 3 in the cleaning water peeling section 4 is too large, air will be accumulated in the section 4 and cause siphon breakage, so it must be made not to be larger than necessary.

Thus, in such a flush toilet, when wash water is supplied from a wash water supply device such as a low tank, 60% to 70% of the wash water is discharged from the main outlet 7 as in the conventional siphon toilet. It is discharged intensively to form a main stream, and a swirl flow is generated in the stored water due to the directionality of this main stream. On the other hand, the remaining cleaning water is ejected from the rim water discharge hole 11 of the water passage rim 1 to flow down the ball surface to clean the ball surface.

Then, the water level rise from the water level rise position b required for siphon generation, that is, the position a corresponding to the accumulated water surface to a position corresponding to a height corresponding to half the inner diameter of the drainage channel top 34, rises. Due to the narrowness above the water surface, a small amount of water is achieved, and yet it is achieved early.

The washing water flown into the ball portion 2 enters the drain trap 3, passes through the ascending path 36, over the top portion 34 of the drain trap 3, and flows into the descending path 33. Although it is activated, at this time, the main flow flowing in a swirling state in the ball portion 2 is efficiently guided to the inlet 31 of the drain trap 3 by the guide portion 8.

In addition, the water pressure per unit area applied to the trap inlet 31 is large because the water trap is slightly narrowed from below the position a corresponding to the accumulated water surface to the drain trap inlet 31, so that the washing water is pushed into the drain trap 3. Strong,
The wash water vigorously and smoothly flows into the drain trap 3, and quickly flows over the trap top 34 to the trap descending path 33.

The water flowing over the trap top 34 into the trap descending path 33 has a lower edge of the drain trap top 34 having a width substantially the same as the width of the trap 3, and most of the water is substantially horizontal. Due to the cross-sectional shape that exists, the instantaneous flow rate of water flowing into the descending path 33 increases. Moreover, the water that has passed the drain trap top 34 is separated from the wall surface of the trap by the wash water separation unit 4 so as not to flow down along the wall surface continuous from the lower edge of the drain trap 3 at the top 34. As a result, the descending path 33 of the drain trap 3 is filled with water early, so that the siphon can be started earlier and the amount of water required for cleaning can be reduced.

The feature of the present invention described above, that is, a large amount of cleaning water separate from the cleaning water for ball cleaning is provided at a position higher than the position a corresponding to the accumulated water surface of the ball portion and near the inlet 31 of the drain trap 3. In addition to providing a mainstream discharge port 7 for discharging water, a guide part 8 is formed on the ball surface for efficiently guiding the large amount of wash water discharged from the mainstream discharge port 7 to the drain trap inlet 31. The upper part of the trap water is narrowed, the lower part of the ball part 2 is narrower than the trap surface, and the trap top 34 has a height substantially corresponding to the lateral width of the trap 3 and is below the trap 3 in the section. The edge is approximately the same width as the width of the trap 3, and the shape is such that most of it is almost horizontal. At the boundary between the top 34 of the drain trap and the descending channel 33, the water that exceeds the top 34 is Peeled from the inner wall surface of trap 3 It is most effective to equip all the toilet bowls with one point like the above-mentioned embodiment, but the siphon can be started early even if only one point or any two or more points are provided. It is effective for water and has sufficient water saving effect.

Next, FIGS. 12 to 14 show other embodiments of the mainstream discharge port 7 and the guide portion 8 for guiding the mainstream to the trap drainage channel inlet 31. In each of the embodiments, the mainstream discharge port 7 is provided. The large amount of wash water discharged from the port 7 is formed so as to drop toward the surface of the accumulated water without giving particular directionality.

In the embodiment shown in FIG. 12, the guide portion 8 is formed in the shape of a wall protruding and standing upright on the ball surface, as in the case shown in FIG. The washing water discharged from the mouth 7 is provided directly below the mouth 7, and the standing wall surface of the guide portion 8 has an angle so that the colliding washing water is directed toward the drain trap inlet 31. Has been formed.

Further, in the embodiment shown in FIG. 13, the groove portion is formed on the ball surface from the position where the guide portion 8 is close to the mainstream discharge port 7 toward the drain trap inlet 31. The main flow discharged from the main flow discharge port 7 flows through the groove-shaped guide portion 8 and is guided to the drain trap inlet 31.

Further, in the embodiment shown in FIG. 14, the ball portion 3 is formed with a large inclination angle so that one of the left and right ball surfaces is steeper than the other ball surface. The inlet 31 of the drain trap is provided eccentrically on the surface side, and the mainstream discharge port 7 is arranged on the ball surface side facing the ball surface formed in a steep slope. Therefore, in this embodiment, the mainstream discharged from the mainstream outlet 7 smoothly flows down to the drain trap inlet 31 and is guided to the inlet 31 due to the eccentric shape of the ball portion 3. That is, in this embodiment, the eccentric shape of the ball portion 3 itself has a shape that easily guides the main stream to the drain trap inlet 31, but the ball surface formed especially steeply directs the main stream to the drain trap inlet 31. It plays an important role as the guide unit 8 for guiding to. Note that the position of the mainstream discharge port 7 may be arbitrarily set at a position other than the ball surface side facing the steeply formed ball surface, such as the front end portion of the ball portion 3.

Although the embodiment described and illustrated above is a siphon toilet, the present invention can be similarly implemented in a semi-siphon toilet. Although it can be applied to a siphon-jet toilet, the siphon-jet toilet has a structure that ejects the main flow from the reservoir to the drain trap inlet, so it is installed above the reservoir surface. The mainstream discharge port 7 and the guide portion 8 for guiding the mainstream to the drain trap are unnecessary. Further, the siphon-jet toilet bowl may have a lower water level rising position b required to cause the siphon action than the siphon toilet bowl described in the embodiment, so that the portion 22 for raising the ball surface to a nearly vertical state may be used. The top does not have to be very high on the siphon toilet.

[0050]

[Effect] Since the present invention is configured as described above, the following effects can be obtained. (1). At the boundary between the top of the drain trap and the descending path of the drain trap, a wash water peeling section that drastically changes the shape of the inner wall surface of the trap that continues from the top to the descending path is provided. Due to the peeling part, it will be immediately peeled from the inner wall of the trap, and especially in the early stage of drainage when there is not much water that passes over the top of the trap drainage channel, the water that has passed over the top becomes a step surface of the descent from the top. It does not flow down along the surface on the opposite side and is not discharged at all without contributing to the siphon activation, and is effectively used for the siphon activation. As a result, the drain trap's descending path will fill up quickly and the siphon will start early. Therefore, less water is wasted, and water is saved.

(2). From the position corresponding to the accumulated water surface of the ball portion as a reference, upward from that position, the ball surface of the portion up to the position corresponding to the amount of rise in the water level required to cause the siphon action is raised in a nearly vertical state, Since the ball section cross-sectional area of this portion is formed so as not to be much different from the ball section cross-sectional area at the position corresponding to the water storage surface, the cross-sectional area of this portion is wider than the cross-sectional area of the water storage surface , Less water is needed to raise the water level to that required for siphoning. As mentioned above, since the water level necessary for siphon activation can be obtained with a small amount of water, if the supplied water is the same, a large amount of water is needed to obtain the water level required for siphon activation. It takes less time to reach the water level, and the siphon activates faster, saving water.

(3). The cross-sectional shape of the drain trap top,
The height of the water level rises because the height of the trap is almost equal to the width of the trap, and the lower edge of the trap in the cross section is almost the same width as the width of the trap, and most of it is almost horizontal. If they are the same, the instantaneous flow rate of the water flowing in the descending passage will be larger than that of a drain trap with a circular cross section, and the water flowing in the descending passage will be biased toward the central part like the one with a circular cross section, and both sides will be There is no such thing as a small amount of water flowing into the water, and the water flows evenly into the entire descent, so that the descent is filled up quickly and the siphon is activated early. Therefore, water saving is achieved.

(4). The front side ball surface of the ball part, from a position slightly below the position equivalent to the accumulated water surface to the bottom of the ball part,
Since the rising angle is made large so that it becomes a steep slope and the distance between the part and the rear wall of the ball part is set to 60 to 90 mm, the water pressure per unit area at the entrance of the drain trap becomes large and the drain trap descends. The water is pushed out to the road faster, and the siphon starts earlier. Moreover, since the water pressure per unit area becomes large, the force to push the sewage into the drain trap also becomes large, and the flow velocity of the water flowing into the drain trap becomes faster, which is also effective in discharging the floating sewage, The discharge capacity is improved. Further, the distance between the above portion and the rear wall of the ball portion is set so as not to obstruct the discharge of the waste such as clogging of the waste.

(5). A mainstream discharge port that discharges a large amount of cleaning water in addition to the cleaning water for ball cleaning is provided above the position equivalent to the accumulated water surface of the ball section, and a large flow rate cleaning discharged from the mainstream discharge port is provided on the ball surface. Since the guide part that efficiently guides the water to the inlet of the drain trap is formed, the main flow acts similarly to the zet flow in the siphon zet type toilet bowl, and the drain trap can be quickly filled up with water and the siphon can be activated early. Moreover, in the siphon zette type toilet bowl, the toilet bowl structure is simpler and easier to manufacture than in the case where a dedicated flow path is provided in the toilet bowl body for guiding the water for the jet to the lower side of the reservoir surface. (6). By combining the above configurations, the effects are synergized and the water saving effect is further enhanced.

[Brief description of drawings]

FIG. 1 is a partially cutaway view showing a flush toilet bowl according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line (2)-(2) of FIG.

FIG. 3 is a sectional view taken along line (3)-(3) of FIG.

FIG. 4 is a perspective view of a main part.

5 is an enlarged sectional view taken along line (5)-(5) of FIG.

FIG. 6 is an explanatory view showing the amount of water required to raise the water level to a position required to activate the siphon, in comparison with a conventional toilet bowl, (a) is a conventional toilet bowl, and (b) is a 1 illustrates a toilet bowl of the present invention.

FIG. 7 is an explanatory view showing the instantaneous flow rate of water supplied to the descending passage beyond the top of the drain trap, in comparison with a conventional toilet bowl;
(A) shows the conventional toilet bowl, (b) shows the toilet bowl of the present invention.

FIG. 8 is a vertical cross-sectional side view of a flush toilet showing another embodiment of the mainstream outlet.

FIG. 9 is a partially cutaway plan view showing another embodiment of the cleaning water introducing passage.

FIG. 10 is a perspective view of a main portion showing another embodiment of the guide portion.

FIG. 11 is a vertical cross-sectional side view of a flush toilet showing another embodiment of the flush water peeling portion.

FIG. 12 is a perspective view showing another embodiment of the mainstream discharge port and the guide portion.

FIG. 13 is a perspective view showing still another embodiment of the mainstream discharge port and the guide portion.

FIG. 14 is a sectional view showing still another embodiment.

[Explanation of symbols]

A: Toilet main body 1 Rim water passage 2: Ball part 3: Drain trap 3: Wash water stripping part 7: Mainstream discharge port 8: Guide part 11: Rim water discharge hole 31: Drain trap inlet 33: Drain trap descent path 34: Top part of drain trap 37: Bottom wall of trap at top part of drain trap a: Position equivalent to reservoir surface b: Position equivalent to rising water level necessary to activate siphon

Claims (14)

[Claims] 1. A washing water separating portion is formed at the boundary between the top of the drain trap and the descending passage of the drain trap, which sharply changes the shape of the inner wall surface of the trap from the bottom wall of the trap at the top to the descending passage. Characteristic flush toilet bowl. 2. A state in which a ball surface of a portion up to a position corresponding to a water level rise necessary for activating a siphon action is approximately vertical with respect to a position corresponding to the accumulated water surface of the ball portion as a reference. The flush toilet bowl is characterized in that the ball section cross-sectional area of the portion is formed so as not to be much different from the ball section cross-sectional area at the position corresponding to the accumulated water surface. 3. The cross-sectional shape of the top of the drain trap has a height substantially corresponding to the lateral width of the trap, and the lower edge of the trap in the cross-section has substantially the same lateral width as the trap, and most of it is substantially horizontal. A flush toilet bowl characterized by being formed into a shape such as. 4. A space between the ball portion and the rear wall of the ball portion is formed by forming a large upright angle so that the ball surface on the front side of the ball portion is slightly lower than the position corresponding to the reservoir surface to the bottom portion of the ball portion so as to form a steep slope. A flush toilet bowl having a size of 60 to 90 mm. 5. A mainstream discharge port for discharging a large amount of cleaning water separate from the cleaning water for ball cleaning is provided above the position equivalent to the accumulated water surface of the ball portion, and the ball surface is discharged from the mainstream discharge port. A flush toilet bowl having a guide portion that efficiently guides a large amount of wash water to the drain trap inlet. 6. The flush toilet according to claim 5, wherein the mainstream outlet discharges 40% or more, preferably 60% to 70%, of the flush water supplied to the toilet from the water supply device. Toilet bowl. 7. The flush toilet according to claim 5 or 6, wherein a direction in which the wash water forms a swirl flow in the ball with respect to a large flow of wash water discharged from the main stream discharge port. A flush toilet characterized by being formed so as to be given. 8. The flush toilet according to claim 5 or 6, wherein the mainstream discharge port drops the large-volume flush water discharged from the flush port toward the reservoir surface without giving particular directionality. A flush toilet characterized by being formed as follows. 9. The flush toilet according to claim 5 or 6, wherein the guide portion is a groove-like recess formed on the ball surface extending toward the drain trap inlet. 10. The flush toilet according to claim 5 or 6, wherein the ball portion is formed with a large inclination angle so that one of the left and right ball surfaces is steeper than the other ball surface.
A flush toilet bowl characterized in that an inlet for a drain trap is provided eccentrically on the steeply inclined ball surface side, and the steeply inclined surface serves as a guide portion. 11. The flush toilet bowl according to claim 7, wherein the guide portion extends from a position slightly below a position corresponding to the stored water surface of the ball surface to a position substantially corresponding to a rise in water level necessary to activate the siphon action. 1. A flush toilet bowl having a shape for controlling the directionality of a main flow that is formed and swirled in the. 12. The flush toilet according to claim 8, wherein the guide portion has a shape in which a large amount of wash water that drops from a mainstream discharge port to the reservoir surface is directly collided to guide the wash water to a drain trap inlet. A flush toilet. 13. The flush toilet according to claim 11, wherein the guide portion is substantially equivalent to the amount of rise in the water level required to activate the siphon action from a position slightly below the position corresponding to the stored water surface on the front ball surface of the ball portion. A flush toilet characterized in that the flush toilet is configured by a step portion formed up to a position to be opened. 14. The flush toilet bowl according to claim 11 or 11, wherein the guide portion is formed in a wall shape protruding from the ball surface and standing upright.