JP2014058863A - Flush toilet bowl - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flush toilet bowl capable of reliably discharging floating dirt while meeting a demand for saving water.SOLUTION: A flush toilet bowl 1 includes a bowl part 8 having a dirt receiving surface 12, a rim portion 14 located at the upper edge, and a water channel formed between the dirt receiving surface 12 and the rim portion 14 so that washing water flows therein, a water discharge part (a first water discharge port 18) which discharges the washing water onto the water channel of the bowl part 8 to form a swirl flow A and of which the water discharging direction is the forward direction of the toilet bowl, and a drain trap pipeline whose inlet is connected to a lower portion of the bowl part 8 for discharging the dirt. On the dirt receiving surface 12 of the bowl part 8, a recessed portion 32 is formed having side walls 32a, 32b extending from the front side of the bowl part 8 toward the inlet of the drain trap pipeline and a bottom face 32c.

Description

  The present invention relates to a flush toilet.

  In recent years, there has been a strong demand for water saving, and there is a need for a flush toilet that satisfies the demand for water saving and has better performance (improved discharge performance). Furthermore, even if water saving is performed, it is necessary to surely discharge the floating filth in the toilet bowl, and a flush toilet that satisfies such a demand is required.

  For example, in Patent Document 1, among the step portions of the front inner peripheral surface, the left and right side inner peripheral surfaces, and the rear inner peripheral surface that form the upper edge of the bottom of the toilet bowl (bowl surface), In addition, a siphon type flush toilet (siphon type toilet) is disclosed in which a step portion of the front inner peripheral surface thereof is set to a position higher than a water level rising position of a water storage surface by water supply.

  In the siphon type toilet of Patent Document 1, when washing water is supplied to the toilet bowl (bowl surface), the washing water is swirled within the upper edge of the bottom, and the washing water is swung to the inner peripheral surface of the toilet bowl. Since it is made not to be expanded, the floating filth does not remain on the inner peripheral surface of the toilet bowl, and the floating filth can be reliably discharged.

JP-A-8-120741

  However, the siphon-type toilet of Patent Document 1 can discharge floating filth due to the above-described structure. However, in a wash-out toilet (also referred to as a wash-down toilet) that does not use the siphon action, Patent Document 1 Even if the structure is adopted, it is a toilet that discharges filth to the outside due to a drop due to a rise in the water level in the drainage channel. Since it is swiveled within the upper edge, the pushing force into the trap pipe is weakened, and there is a problem that the floating filth cannot be discharged reliably.

  Then, this invention was made in order to solve the problem of a prior art, and it aims at providing the wash-off type toilet bowl which can discharge | emit floating-type filth reliably while satisfy | filling the request | requirement of water-saving. Yes.

In order to achieve the above-described object, the present invention is a wash-out toilet that cleans a toilet bowl with washing water and discharges waste, and includes a waste receiving surface, a rim portion located at an upper edge, and these wastes. A bowl part provided with a shelf part formed between the receiving surface and the rim part, and a swirling flow is formed on the shelf part of the bowl part to form a swirling flow, and the water discharge direction is the forward direction of the toilet bowl A drainage trap pipe that has an inlet connected to a lower part of the bowl part and discharges filth, and a drainage trap pipe of the bowl part from the front side of the bowl part to the filth receiving surface of the bowl part. A concave portion having a side wall and a bottom surface extending toward the inlet is formed.
In the flush toilet of the present invention configured as described above, a concave portion having a side wall and a bottom surface extending from the front side of the bowl portion toward the inlet of the drain trap pipe is formed on the filth receiving surface of the bowl portion. Therefore, a part of the wash water discharged from the water discharge part in the forward direction of the toilet forms a swirl, but most of the wash water collides with the side wall of the recess and flows toward the inlet of the drain trap pipe. It becomes a flow. As a result, according to the present invention, this inflow allows the floating filth in the bowl portion to be reliably discharged.

In the present invention, preferably, the rear end of the bottom surface of the recess is positioned below the rising water level during toilet flushing, and the upper end of the recess side wall is higher than the rising water level during toilet cleaning. It is formed so as to be positioned above.
In the present invention configured as described above, the accumulated water that has risen during toilet flushing stays in the recess, so that the indentation flow gains water and flows all at once toward the inlet of the drain trap pipe, thereby floating System waste can be discharged more reliably.

In the present invention, the bottom surface of the recess is preferably formed so as to have a downward slope from the front side of the bowl portion toward the inlet of the drain trap pipe.
In the present invention configured as described above, since the bottom surface of the concave portion is formed to have a downward slope, the cleaning water discharged from the water discharging portion and colliding with the side wall of the concave portion smoothly enters the drain trap pipe inlet. As it flows in, it is possible to discharge floating filth more reliably.

In the present invention, preferably, the recess is formed so that a central axis extending in the front-rear direction of the toilet bowl is coaxial with a central axis extending in the front-rear direction of the toilet bowl at the entrance of the drain trap pipe in the toilet width direction. .
In the present invention configured as described above, since the recess is formed so that the central axis thereof is coaxial with the central axis of the inlet of the drain trap pipe, the indentation flow formed in the concave is the drain trap pipe. The pressure loss when flowing into the inlet of the gas can be minimized, so that the floating filth can be discharged more reliably.

In this invention, Preferably, the front part of a recessed part and the rim | limb part are continuously formed in the front part of the filth receiving surface of a bowl part, without forming a shelf part.
In the present invention configured as described above, since the front part of the recess and the rim part are continuously formed at the front part of the filth receiving surface of the bowl part, water is discharged from the water discharge part onto the shelf part and swirled. Most of the washing water that forms the water flows into the recess, whereby the flow rate of the washing water that becomes the pushing flow increases, and the floating filth can be discharged more reliably.

In the present invention, preferably, a vertical wall portion is formed on the rear side of the filth receiving surface of the bowl portion so as to surround the stored water from all sides and suppress the spread of the swirling flow of the cleaning water when the level of the stored water rises. The portion is continuously formed at substantially the same height as the side wall of the recess.
In the present invention configured as above, the vertical wall portion that surrounds the accumulated water from the four sides on the rear side of the filth receiving surface of the bowl portion suppresses the spread of the swirling flow of the washing water when the level of the accumulated water rises. Therefore, this makes it possible to discharge the floating filth more reliably.

Preferably, the present invention preferably further includes a second water discharge portion that is formed on the side surface of the waste receiving surface and discharges cleaning water toward the stored water and stirs the stored water in the vertical direction.
In the present invention configured as described above, since the stored water is stirred up and down by the cleaning water discharged from the second water discharging section, the cleaning performance is improved accordingly. In addition, the floating filth that floated on the surface of the pool is submerged in the pool and collected at the center of the swirl. It is possible to discharge filth more reliably.

  According to the flush toilet of the present invention, it is possible to satisfy the demand for water saving and to reliably discharge floating filth.

It is side surface sectional drawing of the flush toilet bowl by embodiment of this invention. It is a top view of the wash-out type toilet of FIG. FIG. 3 is a front cross-sectional view of a wash-out toilet seen along line III-III in FIG. 2. It is front sectional drawing of the wash-out type toilet seen along the IV-IV line of FIG. It is front sectional drawing of the wash-out type toilet seen along the IV-IV line of FIG. It is front sectional drawing of the wash-out type toilet seen along the VI-VI line of FIG. It is the perspective view which looked at the wash-out type toilet of FIG. 1 from the diagonally upper front of the toilet bowl.

  Next, an embodiment of the present invention will be described with reference to FIGS. Here, FIG. 1 is a side sectional view of a flush toilet according to an embodiment of the present invention, FIG. 2 is a plan view of the flush toilet of FIG. 1, and FIG. 3 is taken along the line III-III of FIG. 4 is a front cross-sectional view of the wash-out toilet, and FIG. 4 is a front cross-sectional view of the wash-out toilet seen along line IV-IV in FIG. 2, and FIG. 5 is along the IV-IV line in FIG. 6 is a front cross-sectional view of the wash-out toilet, FIG. 6 is a front cross-sectional view of the wash-out toilet seen along line VI-VI in FIG. 2, and FIG. 7 is a front view of the wash-out toilet in FIG. It is the perspective view seen from diagonally upward.

First, as shown in FIGS. 1 to 6, a flush toilet 1 according to an embodiment of the present invention is a floor-standing type, and is a flush-out that discharges filth using a drop due to a rise in the water level in a drain trap pipe to be described later. This is a flush toilet (wash-down toilet), and includes a toilet body 2 and a water storage tank (shown in the figure) attached to the upper rear portion of the toilet body 2. The water storage tank is provided with a drain valve, which is opened and closed by operating an operation lever so that flush water is supplied to the toilet body 2.
The present invention can be applied to wall-mounted wash-out toilets in addition to floor-mounted toilets, and can also be applied to wash-out toilets that use a flush valve directly connected to a water pipe without using a water storage tank. is there.

The toilet body 2 includes a bowl portion 8 and a drain trap pipe 10 that extends from the bottom portion of the bowl portion 8 so as to communicate therewith.
The bowl portion 8 includes a filth receiving surface 12, a rim portion 14 that is located at an upper edge portion of the filth receiving surface 12, and an upper portion of the inner peripheral surface projects inward, and the filth receiving surface 12 and the rim portion. 14 and a shelf 16 (see FIG. 3 to FIG. 6) formed between the two.

  The drain trap pipe 10 extends obliquely upward from the inlet 10a opened at the bottom of the bowl portion 8, passes through the highest point 10b, extends obliquely downward, reaches the outlet 10c, and is connected to a drain pipe (not shown). Yes. The stored water level L1 of the flush toilet 1 is equal to the height of the highest point 10b of the trap pipe 10.

A first water discharge port 18 that is a first water discharge portion that discharges the wash water is formed slightly behind the shelf portion 16 that is located on the left side when viewed from the front of the toilet bowl of the bowl portion 8. The washing water discharged from the first water outlet 18 to the toilet bowl front phrase forms a swirling flow A (see FIG. 7) in the bowl portion 8.
In addition, a second water discharge port 20 for discharging cleaning water is formed on the rear end side of the shelf portion 16 located on the right side of the bowl portion 8. The wash water discharged from the second water discharge port 20 in the toilet direction forms a swirl flow A that swirls in the same direction as the wash water discharged from the first water discharge port 18.
Furthermore, although mentioned later for details, the 3rd water discharge port 22 which is a 2nd water discharge part is formed in the side surface of the left filth receiving surface 12 seeing from the toilet front of the bowl part 8. As shown in FIG.

A water passage chamber 24 is formed at the rear part of the toilet body 2, and the rear end side of the water passage chamber 24 communicates with a water storage tank (not shown) so that washing water is supplied from the water storage tank. Yes.
Further, at the front end side of the water flow chamber 24, a first water passage 26 that supplies cleaning water to the first water outlet 18, a second water passage 28 that supplies cleaning water to the second water outlet 20, and Third water passages 30 for supplying cleaning water to the three water outlets 22 are respectively provided.

  Next, the detailed structure of the bowl part 8 is demonstrated. As shown mainly in FIGS. 1 and 2, a recess 32 extending from the front side of the bowl portion 8 toward the inlet 10 a of the drain trap pipe 10 is formed on the filth receiving surface 12 of the bowl portion 8. 32 includes side walls 32a and 32b and a bottom surface 32c. Since the side walls 32a and 32b are convex toward the central axis 10d extending in the front-rear direction of the toilet bowl, the spread of the swirling flow of the washing water that swirls around the bottom surface 32c can be suppressed.

  The recess 32 formed in the filth receiving surface 12 has a central axis 32d extending in the front-rear direction of the toilet bowl, coaxial with the central axis 10d extending in the front-rear direction of the toilet bowl of the inlet 10c of the drain trap pipe 10 in the toilet width direction. It is arranged to be.

Further, the bottom surface 32 c of the concave portion 32 is formed so as to be inclined downward from the front side of the bowl portion 8 toward the inlet 10 a of the drain trap pipe 10.
Furthermore, as shown in FIG. 1, in the front part 12a of the filth receiving surface 12 of the bowl part 8, the front part of the recessed part 32 and the rim | limb part 14 are formed continuously, without forming the shelf part 16. As shown in FIG. .

  Here, the end 32e on the rear side of the bottom surface 32c of the recess 32 is located below the accumulated water rising water level L2 during toilet flushing, and the upper end 32f on the rear side of the side wall of the recess 32 rises in accumulated water during toilet flushing. It is formed so as to be located above the water level L2.

Next, as mainly shown in FIGS. 1 and 2, a vertical wall portion 34 is formed on the rear side of the filth receiving surface 12 of the bowl portion 8 so as to surround the accumulated water from four directions. The vertical wall 34 includes a front vertical wall 34a that is connected to the rear end of the above-described recess 32 and surrounds the accumulated water from the front side, and a rear vertical wall 34b that surrounds the accumulated water from three sides on the rear side. ing.
The vertical wall portion 34b is continuously formed at substantially the same height as the side walls 32a and 32b of the recess 32 described above (see FIGS. 1 and 7).

Further, as shown in FIG. 1, a step portion extending in the horizontal direction at the lower end side of the front side vertical wall portion 34 a of the vertical wall portion 34 near the inlet 10 a of the drain trap pipe 10 on the lower side of the bowl portion 8. 36 is formed.
The third water discharge port 22 as the second water discharge unit described above is provided above the stepped portion 36 and at a position above the stored water level L1. The washing water discharged from the third water discharge port 22 onto the stepped portion 36 agitates the accumulated water in the vertical direction to form a vertical stirring flow B.

  Next, the operation of the above-described embodiment will be described mainly with reference to FIG. In the flush toilet 1 according to the present embodiment, the wash water in the water storage tank enters the water flow chamber 24 of the toilet body 2 by the user's operation, and from the water flow chamber 24 to the first water flow channel 26. The water is discharged from the first water outlet 18, the second water outlet 20, and the third water outlet 22 to the bowl portion 8 through the second water passage 28 and the third water passage 30, respectively.

  At this time, in the wash-out toilet 1 of the present embodiment, the side walls 32a and 32b and the bottom surface 32c extending from the front side of the bowl portion 8 toward the inlet 10a of the drain trap conduit 10 on the filth receiving surface 12 of the bowl portion 8. Is formed, a part of the wash water discharged from the first water outlet 18 in the forward direction of the toilet forms a swirl A, but the wash water discharged from the first water outlet 18 Most of the water collides with the side wall 32b located on the right side when viewed from the front of the toilet of the recess 32, and becomes a pushing flow C that flows toward the inlet 10a of the drain trap pipe 10. As a result, according to the wash-out toilet 1 according to the present embodiment, the floating filth in the bowl portion 8 can be reliably discharged by the pushing flow C.

  Further, in the flush toilet 1 of the present embodiment, the end 32e on the rear side of the bottom surface 32c of the recess 32 is positioned below the accumulated water rising level L2 during toilet cleaning, and behind the side walls 32a and 32b of the recess 32. The upper end portion 32f on the side is formed so as to be positioned above the rising water level L2 during flushing of the toilet bowl. Therefore, the accumulated water rising during flushing of the toilet bowl stays in the recess 32, and the push-in flow C generates water. As a result, it flows into the inlet 10a of the drain trap pipe 10 all at once, so that the floating filth can be discharged more reliably.

  Further, in the washout toilet 1 of the present embodiment, the bottom surface 32c of the recess 32 is formed so as to have a downward slope from the front side of the bowl portion 8 toward the inlet 10c of the drain trap pipe 10, Since the wash water discharged from the first water discharge port 18 and colliding with the vertical wall 32b of the recess 32 smoothly flows toward the inlet 10c of the drain trap pipe 10, the floating filth can be discharged more reliably.

  In the flush toilet 1 of the present embodiment, the recess 32 has a central axis 32d extending in the front-rear direction of the toilet, a central axis 10d extending in the front-rear direction of the toilet 10 at the inlet 10c of the drain trap pipe 10, and the toilet width direction. , The pressure loss when the pushing flow C formed in the recess 32 flows into the inlet 10a of the drain trap pipe 10 can be minimized, Floating filth can be discharged more reliably.

  Moreover, in the wash-out toilet 1 of this embodiment, the front part of the recessed part 32 and the rim | limb part 14 are formed continuously, without forming the shelf part 16 in the front part of the filth receiving surface 12 of the bowl part 8. FIG. As a result, most of the washing water discharged from the first outlet 18 onto the shelf 16 and forming a swirling flow flows into the recess 32, thereby increasing the flow rate of the washing water that becomes the pushing flow C, Floating filth can be discharged more reliably.

  Further, in the wash-out toilet 1 of the present embodiment, the vertical side surrounds the stored water from the four sides on the rear side of the filth receiving surface 12 of the bowl portion 8 and suppresses the spread of the swirling flow A when the level of the stored water rises. The wall portion 34 (34a, 34b) is formed, and the vertical wall portion 34 is formed continuously at substantially the same height as the side walls 32a, 32b of the recess 32. Since the spread of the swirling flow A of the washing water is suppressed when the water level rises, the floating filth can be more reliably discharged.

  Furthermore, the wash-out toilet 1 of the present embodiment is formed with a third water discharge port 22 that is formed on the side surface of the filth receiving surface 12 to discharge the wash water toward the stored water and stir the stored water in the vertical direction. Therefore, the cleaning performance is improved accordingly. Furthermore, the floating filth that floats on the surface of the stored water is submerged in the stored water and collected at the center of swirling. The floating filth collected at the center of the swirling flow is poured into the inlet 10a of the drain trap pipe 10 by the extrusion flow C. It is possible to discharge floating filth more reliably.

DESCRIPTION OF SYMBOLS 1 Washing-out type toilet 2 Toilet bowl main body 8 Bowl part 10 Drain trap pipe line 10a Drain trap pipe inlet 10b Drain trap pipe highest point 10c Drain trap pipe outlet 12 Soil receiving surface 14 Rim part 16 Shelf part 18 First Water outlet (water discharge part)
20 2nd water outlet 22 3rd water outlet (2nd water discharge part)
24 water passage chamber 26 first water passage 28 second water passage 30 third water passage 32 concave portions 32a, 32b side walls 32c bottom surface 34 vertical wall portion 34a front side vertical wall portion 34b rear side vertical wall portion 36 step portion L1 L2 Reservoir rising water level during toilet flushing A Swirling flow B Vertical stirring flow C Pushing flow

The present invention relates to a flush toilet such as a flush toilet .

  In recent years, there has been a strong demand for water saving, and there is a need for a flush toilet that satisfies the demand for water saving and has better performance (improved discharge performance). Furthermore, even if water saving is performed, it is necessary to surely discharge the floating filth in the toilet bowl, and a flush toilet that satisfies such a demand is required.

  For example, in Patent Document 1, among the step portions of the front inner peripheral surface, the left and right side inner peripheral surfaces, and the rear inner peripheral surface that form the upper edge of the bottom of the toilet bowl (bowl surface), In addition, a siphon type flush toilet (siphon type toilet) is disclosed in which a step portion of the front inner peripheral surface thereof is set to a position higher than a water level rising position of a water storage surface by water supply.

  In the siphon type toilet of Patent Document 1, when washing water is supplied to the toilet bowl (bowl surface), the washing water is swirled within the upper edge of the bottom, and the washing water is swung to the inner peripheral surface of the toilet bowl. Since it is made not to be expanded, the floating filth does not remain on the inner peripheral surface of the toilet bowl, and the floating filth can be reliably discharged.

JP-A-8-120741

However, the siphon-type toilet of Patent Document 1 can discharge floating filth due to the above-described structure. However, in a wash-out toilet (also referred to as a wash-down toilet) that does not use the siphon action, Patent Document 1 Even if the structure is adopted, it is a toilet that discharges filth to the outside due to a drop due to a rise in the water level in the drainage channel, so there is no pulling force due to the siphon action as in the siphon-type toilet, and the washing water is discharged at the bottom. Since it is swiveled within the upper edge, the pushing force into the trap pipe is weakened, and there is a problem that the floating filth cannot be discharged reliably. Also, siphon type toilets need to discharge floating filth more reliably.

Then, this invention was made | formed in order to solve the trouble of a prior art, and it aims at providing the flush toilet which can discharge | emit a floating system waste reliably while satisfy | filling the request | requirement of water saving. Yes.

In order to achieve the above-described object, the present invention is a flush toilet that flushes toilets with washing water and discharges filth, and includes a filth receiving surface, a rim portion located at an upper edge, and these filths. a bowl portion having a water conduit for formed between the receiving surface and a rim portion flowing wash water, a water discharge unit to form a swirling flow by jetting the cleaning water on the water conduit of the bowl portion, the bowl A drain trap pipe that is connected to the lower portion of the section and discharges filth, and extends from the front side of the bowl section toward the inlet of the drain trap pipe on the filth receiving surface of the bowl section. A concave portion is formed.
In the washout toilet of the present invention configured as described above, a recess extending from the front side of the bowl portion toward the inlet of the drain trap pipe is formed on the filth receiving surface of the bowl portion. A part of the discharged wash water forms a swirl flow, but most of the wash water collides with the recess and becomes a push flow that flows toward the inlet of the drain trap pipe. As a result, according to the present invention, this inflow allows the floating filth in the bowl portion to be reliably discharged.

In the present invention, preferably, the concave portion includes a side wall and a bottom surface, and an end portion on the rear side of the bottom surface of the concave portion is positioned below the rising water level during toilet flushing, and an upper end portion on the rear side of the side wall of the concave portion is It is formed so as to be positioned above the rising water level during toilet flushing.
In the present invention configured as described above, the accumulated water that has risen during toilet flushing stays in the recess, so that the indentation flow gains water and flows all at once toward the inlet of the drain trap pipe, thereby floating System waste can be discharged more reliably.

In the present invention, preferably, the recess includes a side wall and a bottom surface, and the bottom surface of the recess is formed so as to descend downward from the front side of the bowl portion toward the inlet of the drain trap pipe.
In the present invention configured as described above, since the bottom surface of the concave portion is formed to have a downward slope, the cleaning water discharged from the water discharging portion and colliding with the side wall of the concave portion smoothly enters the drain trap pipe inlet. As it flows in, it is possible to discharge floating filth more reliably.

In the present invention, preferably, the recess is formed so that a central axis extending in the front-rear direction of the toilet bowl is coaxial with a central axis extending in the front-rear direction of the toilet bowl at the entrance of the drain trap pipe in the toilet width direction. .
In the present invention configured as described above, since the recess is formed so that the central axis thereof is coaxial with the central axis of the inlet of the drain trap pipe, the indentation flow formed in the concave is the drain trap pipe. The pressure loss when flowing into the inlet of the gas can be minimized, so that the floating filth can be discharged more reliably.

In this invention, Preferably, the front part of a recessed part and the rim | limb part are continuously formed in the front part of the filth receiving surface of a bowl part, without forming a shelf part.
In the present invention configured as described above, since the front part of the recess and the rim part are continuously formed at the front part of the filth receiving surface of the bowl part, water is discharged from the water discharge part onto the shelf part and swirled. Most of the washing water that forms the water flows into the recess, whereby the flow rate of the washing water that becomes the pushing flow increases, and the floating filth can be discharged more reliably.

In the present invention, preferably, the concave portion has a side wall and a bottom surface, and surrounds the stored water from all sides on the rear side of the filth receiving surface of the bowl portion and suppresses the spread of the swirling flow of the cleaning water when the level of the stored water rises. A wall portion is formed, and the vertical wall portion is continuously formed at substantially the same height as the side wall of the recess.
In the present invention configured as above, the vertical wall portion that surrounds the accumulated water from the four sides on the rear side of the filth receiving surface of the bowl portion suppresses the spread of the swirling flow of the washing water when the level of the accumulated water rises. Therefore, this makes it possible to discharge the floating filth more reliably.

Preferably, the present invention preferably further includes a second water discharge portion that is formed on the side surface of the waste receiving surface and discharges cleaning water toward the stored water and stirs the stored water in the vertical direction.
In the present invention configured as described above, since the stored water is stirred up and down by the cleaning water discharged from the second water discharging section, the cleaning performance is improved accordingly. In addition, the floating filth that floated on the surface of the pool is submerged in the pool and collected at the center of the swirl. It is possible to discharge filth more reliably.

  According to the flush toilet of the present invention, it is possible to satisfy the demand for water saving and to reliably discharge floating filth.

It is side surface sectional drawing of the flush toilet bowl by embodiment of this invention. It is a top view of the flush toilet of FIG. It is front sectional drawing of the flush toilet seen along the III-III line of FIG. It is front sectional drawing of the flush toilet seen along the IV-IV line of FIG. It is front sectional drawing of the flush toilet seen along the IV-IV line of FIG. It is front sectional drawing of the flush toilet seen along the VI-VI line of FIG. It is the perspective view which looked at the flush toilet of FIG. 1 from the diagonally upper front of the toilet bowl.

Next, an embodiment in which the flush toilet of the present invention is applied to a wash-out toilet will be described with reference to FIGS. Here, FIG. 1 is a side sectional view of a flush toilet according to an embodiment of the present invention, FIG. 2 is a plan view of the flush toilet of FIG. 1, and FIG. 3 is taken along the line III-III of FIG. 4 is a front sectional view of the flush toilet , FIG. 4 is a front sectional view of the flush toilet taken along line IV-IV in FIG. 2, and FIG. 5 is taken along line IV-IV in FIG. is a front sectional view of the flush toilet viewed, FIG. 6 is a front sectional view of the flush toilet as seen along line VI-VI in FIG. 2, FIG. 7 is a flush toilet in Figure 1 of the toilet forward It is the perspective view seen from diagonally upward.

First, as shown in FIG. 1 to FIG. 6, a flush toilet 1 that is a flush toilet according to an embodiment of the present invention is a floor-standing toilet and uses a drop due to a rise in the water level in a drain trap pipe, which will be described later. This is a flush toilet bowl (wash-down toilet) that discharges filth, and includes a toilet body 2 and a water storage tank (shown in the figure) attached to the upper rear of the toilet body 2. The water storage tank is provided with a drain valve, which is opened and closed by operating an operation lever so that flush water is supplied to the toilet body 2.
The present invention can be applied to wall-mounted flush toilets in addition to floor-mounted toilets, and can also be applied to flush toilets using a flush valve directly connected to a water pipe without using a water storage tank. is there.

The toilet body 2 includes a bowl portion 8 and a drain trap pipe 10 that extends from the bottom portion of the bowl portion 8 so as to communicate therewith.
The bowl portion 8 includes a filth receiving surface 12, a rim portion 14 that is located at an upper edge portion of the filth receiving surface 12, and an upper portion of the inner peripheral surface projects inward, and the filth receiving surface 12 and the rim portion. 14 and a shelf 16 (see FIG. 3 to FIG. 6) formed between the two.

  The drain trap pipe 10 extends obliquely upward from the inlet 10a opened at the bottom of the bowl portion 8, passes through the highest point 10b, extends obliquely downward, reaches the outlet 10c, and is connected to a drain pipe (not shown). Yes. The stored water level L1 of the flush toilet 1 is equal to the height of the highest point 10b of the trap pipe 10.

A first water discharge port 18 that is a first water discharge portion that discharges the wash water is formed slightly behind the shelf portion 16 that is located on the left side when viewed from the front of the toilet bowl of the bowl portion 8. The washing water discharged from the first water outlet 18 to the toilet bowl front phrase forms a swirling flow A (see FIG. 7) in the bowl portion 8.
In addition, a second water discharge port 20 for discharging cleaning water is formed on the rear end side of the shelf portion 16 located on the right side of the bowl portion 8. The washing water discharged from the second outlet 20 to the back of the toilet forms a swirl flow A that swirls in the same direction as the washing water discharged from the first outlet 18.
Furthermore, although mentioned later for details, the 3rd water discharge port 22 which is a 2nd water discharge part is formed in the side surface of the left filth receiving surface 12 seeing from the toilet front of the bowl part 8. As shown in FIG.

A water passage chamber 24 is formed at the rear part of the toilet body 2, and the rear end side of the water passage chamber 24 communicates with a water storage tank (not shown) so that washing water is supplied from the water storage tank. Yes.
Further, at the front end side of the water flow chamber 24, a first water passage 26 that supplies cleaning water to the first water outlet 18, a second water passage 28 that supplies cleaning water to the second water outlet 20, and Third water passages 30 for supplying cleaning water to the three water outlets 22 are respectively provided.

Next, the detailed structure of the bowl part 8 is demonstrated. As shown mainly in FIGS. 1 and 2, a recess 32 extending from the front side of the bowl portion 8 toward the inlet 10 a of the drain trap pipe 10 is formed on the filth receiving surface 12 of the bowl portion 8. 32 includes side walls 32a and 32b and a bottom surface 32c. Since the side walls 32a and 32b are formed in a concave surface toward the central axis 10d extending in the front-rear direction of the toilet bowl, it is possible to suppress the spread of the swirling flow of the washing water swirling the bottom surface 32c.

  The recess 32 formed in the filth receiving surface 12 has a central axis 32d extending in the front-rear direction of the toilet bowl, coaxial with the central axis 10d extending in the front-rear direction of the toilet bowl of the inlet 10c of the drain trap pipe 10 in the toilet width direction. It is arranged to be.

Further, the bottom surface 32 c of the concave portion 32 is formed so as to be inclined downward from the front side of the bowl portion 8 toward the inlet 10 a of the drain trap pipe 10.
Furthermore, as shown in FIG. 1, in the front part 12a of the filth receiving surface 12 of the bowl part 8, the front part of the recessed part 32 and the rim | limb part 14 are formed continuously, without forming the shelf part 16. As shown in FIG. .

  Here, the end 32e on the rear side of the bottom surface 32c of the recess 32 is located below the accumulated water rising water level L2 during toilet flushing, and the upper end 32f on the rear side of the side wall of the recess 32 rises in accumulated water during toilet flushing. It is formed so as to be located above the water level L2.

Next, as mainly shown in FIGS. 1 and 2, a vertical wall portion 34 is formed on the rear side of the filth receiving surface 12 of the bowl portion 8 so as to surround the accumulated water from four directions. The vertical wall 34 includes a front vertical wall 34a that is connected to the rear end of the above-described recess 32 and surrounds the accumulated water from the front side, and a rear vertical wall 34b that surrounds the accumulated water from three sides on the rear side. ing.
The vertical wall portion 34b is continuously formed at substantially the same height as the side walls 32a and 32b of the recess 32 described above (see FIGS. 1 and 7).

Further, as shown in FIG. 1, a step portion extending in the horizontal direction at the lower end side of the front side vertical wall portion 34 a of the vertical wall portion 34 near the inlet 10 a of the drain trap pipe 10 on the lower side of the bowl portion 8. 36 is formed.
The third water discharge port 22 as the second water discharge unit described above is provided above the stepped portion 36 and at a position above the stored water level L1. The washing water discharged from the third water discharge port 22 onto the stepped portion 36 agitates the accumulated water in the vertical direction to form a vertical direction stirring flow B (see FIG. 6) .

Next, the operation of the above-described embodiment will be described mainly with reference to FIG. In the flush toilet 1 which is a flush toilet according to this embodiment, the wash water in the water storage tank enters the water flow chamber 24 of the toilet body 2 by the user's operation, and from this water flow chamber 24, Water is discharged from the first water outlet 18, the second water outlet 20, and the third water outlet 22 to the bowl portion 8 through the first water passage 26, the second water passage 28, and the third water passage 30, respectively.

  At this time, in the toilet bowl 1 of the present embodiment, the filth receiving surface 12 of the bowl portion 8 is provided with side walls 32a, 32b and a bottom surface 32c extending from the front side of the bowl portion 8 toward the inlet 10a of the drain trap pipe 10. Since the recessed portion 32 is formed, a part of the washing water discharged from the first water outlet 18 in the forward direction of the toilet forms a swirl A, but the amount of the washing water discharged from the first water outlet 18 is large. The portion collides with the side wall 32b located on the right side when viewed from the front of the toilet of the recess 32, and becomes a pushing flow C that flows toward the inlet 10a of the drain trap pipe 10. As a result, according to the wash-out toilet 1 according to the present embodiment, the floating filth in the bowl portion 8 can be reliably discharged by the pushing flow C.

  Further, in the toilet 1 of the present embodiment, the end 32e on the rear side of the bottom surface 32c of the recess 32 is located below the accumulated water rising level L2 during toilet flushing and on the rear side of the side walls 32a and 32b of the recess 32. The upper end 32f is formed so as to be positioned above the rising water level L2 during flushing of the toilet bowl. Therefore, the accumulated water rising during flushing of the toilet bowl stays in the recess 32, and the pushing flow C obtains water. It flows at a stretch toward the inlet 10a of the drain trap pipe 10, so that the floating filth can be discharged more reliably.

  Moreover, in the toilet bowl 1 of this embodiment, since the bottom face 32c of the recessed part 32 is formed so that it may become a downward slope toward the inlet 10c of the drain trap pipe 10 from the front side of the bowl part 8, it is 1st Since the washing water discharged from the water discharge port 18 and colliding with the vertical wall 32b of the recess 32 smoothly flows toward the inlet 10c of the drain trap pipe 10, the floating filth can be discharged more reliably.

  Moreover, in the toilet bowl 1 of the present embodiment, the recess 32 has a central axis 32d extending in the front-rear direction of the toilet bowl, and a central axis 10d extending in the front-rear direction of the toilet bowl 10 at the inlet 10c of the drain trap pipe 10 in the toilet width direction. Since it is formed so as to be coaxial, the pressure loss when the indentation flow C formed in the recess 32 flows into the inlet 10a of the drain trap pipe 10 can be minimized, and thereby the floating system It is possible to discharge filth more reliably.

  Moreover, in the toilet bowl 1 of this embodiment, in the front part of the filth receiving surface 12 of the bowl part 8, the front part of the recessed part 32 and the rim | limb part 14 are formed continuously, without forming the shelf part 16. FIG. Therefore, most of the washing water discharged from the first water discharge port 18 onto the shelf 16 and forming a swirling flow flows into the recess 32, whereby the flow rate of the washing water that becomes the pushing flow C increases and the floating system It is possible to discharge filth more reliably.

  Moreover, in the toilet bowl 1 of this embodiment, the vertical wall part which surrounds stored water from four sides and suppresses the spread of the swirl flow A of the washing water when the level of the stored water rises, on the rear side of the filth receiving surface 12 of the bowl part 8. 34 (34a, 34b) is formed, and the vertical wall 34 is continuously formed at substantially the same height as the side walls 32a, 32b of the recess 32. Since the spread of the swirling flow A is sometimes suppressed, the floating filth can be more reliably discharged.

  Furthermore, since the toilet bowl 1 of this embodiment is formed with a third water discharge port 22 that is formed on the side surface of the filth receiving surface 12 and discharges wash water toward the stored water and stirs the stored water in the vertical direction. Therefore, the cleaning performance is improved. Furthermore, the floating filth that floats on the surface of the stored water is submerged in the stored water and collected at the center of swirling. The floating filth collected at the center of the swirling flow is poured into the inlet 10a of the drain trap pipe 10 by the extrusion flow C. It is possible to discharge floating filth more reliably.

1 Washable toilet (flush toilet)
2 Toilet body 8 Bowl part 10 Drain trap pipe 10a Drain trap pipe inlet 10b Drain trap pipe highest point 10c Drain trap pipe outlet 12 Soil receiving surface 14 Rim part 16 Shelf part 18 First outlet Part)
20 2nd water outlet 22 3rd water outlet (2nd water discharge part)
24 water passage chamber 26 first water passage 28 second water passage 30 third water passage 32 concave portions 32a, 32b side walls 32c bottom surface 34 vertical wall portion 34a front side vertical wall portion 34b rear side vertical wall portion 36 step portion L1 L2 Reservoir rising water level during toilet flushing A Swirling flow B Vertical stirring flow C Pushing flow

Claims (7)

A wash-off type toilet that cleans the toilet bowl with washing water and discharges filth.
A bowl portion comprising a filth receiving surface, a rim portion located at the upper edge, and a shelf formed between the filth receiving surface and the rim portion;
A water discharge part which forms a swirling flow by discharging washing water on the shelf part of the bowl part and the water discharge direction is the forward direction of the toilet bowl, and
A drain trap line for connecting the inlet to the lower part of the bowl part and discharging the filth,
2. A wash-out toilet, wherein a sewage receiving surface of the bowl portion is formed with a recess having a side wall and a bottom surface extending from a front side of the bowl portion toward an inlet of the drain trap pipe.   The rear end of the bottom surface of the recess is positioned below the rising water level during toilet flushing, and the upper end of the rear side of the recess is positioned above the rising water level during toilet cleaning. The wash-out toilet according to claim 1, wherein   The wash-out toilet according to claim 1 or 2, wherein a bottom surface of the concave portion is formed so as to descend downward from the front side of the bowl portion toward the inlet of the drain trap pipe.   The concave portion is formed such that a central axis extending in the front-rear direction of the toilet bowl is coaxial with a central axis extending in the front-rear direction of the toilet bowl at the entrance of the drain trap pipe in the toilet width direction. The wash-out type toilet according to any one of the above.   The front part of the said recessed part and the said rim | limb part are continuously formed in the front part of the filth receiving surface of the said bowl part, without forming the said shelf part. The wash-out toilet described.   A vertical wall portion is formed on the rear side of the filth receiving surface of the bowl portion so as to surround the stored water from all sides and suppress the spread of the swirling flow of the cleaning water when the level of the stored water rises. The washout toilet according to any one of claims 1 to 5, wherein the toilet bowl is formed continuously at substantially the same height as the first toilet.   The wash-off according to any one of claims 1 to 6, further comprising a second water discharge portion formed on a side surface of the waste receiving surface for discharging cleaning water toward the stored water and stirring the stored water vertically. Toilet bowl.

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