JP6472591B2 - Flush toilet - Google Patents

Description

  The present invention relates to a flush toilet, and more particularly, to a flush toilet for washing a bowl portion by swirling flow.

Conventionally, a flush toilet that cleans the bowl portion by swirling flow is known. An example of the conventional flush toilet shown in Patent Document 1 will be described with reference to FIG.
As shown in FIG. 9, the conventional flush toilet 50 discharges washing water from a rim spout 52 to a washing stage (shelf) 56 formed on a bowl surface (bowl surface) 54, thereby Cleaning is performed by swirling flow.
In this conventional flush toilet 50, the front region 54a of the bowl surface 54 is formed in a concave shape along the front-rear direction, and the washing water swirling the bowl surface 54 flows further toward the trap inlet 58. The side regions 54b and 54c are formed in a convex shape along the lateral direction so that filth does not spread outward.

JP 2011-157738 A

However, in the conventional flush toilet described above, the discharge performance for discharging filth from the stored water to the trap drainage channel is improved, but the pot surface 54 is sufficiently washed with the wash water discharged from the rim spout 52. This causes a problem that filth remains on a part of the bowl surface 54. Specifically, since the front region 54 a of the bowl surface 54 is formed in a concave shape along the front-rear direction, the cleaning water discharged from the rim water spouting port 52 passes through the front end of the bowl surface 54. The flow is stalled and falls toward the trap inlet 58 and becomes the flow N1 that does not reach the side region 54c, and the remaining wash water turns into the flow N2, and the wash water is divided into two, and as a result, the side region 54c. As a result, the amount of washing water flowing in the sewage is reduced, and the filth remaining area S is generated.
Such a problem becomes more prominent when a flush toilet with a large pot surface and water saving are performed.

  Then, this invention is made | formed in order to solve the fault of a prior art, and it aims at providing the flush toilet bowl which can prevent that a filth remains on the bowl surface.

In order to achieve the above object, the present invention provides a bowl including a filth receiving surface, a rim portion located at an upper edge, and a shelf formed between the filth receiving surface and the rim portion. And a first water discharge part formed at the center part in the front-rear direction on one side part of the bowl part and forming a swirling flow by discharging the cleaning water forward on the shelf part of the bowl part And a drain trap pipe that is connected to the lower part of the bowl part and discharges filth, and a vertical wall part that surrounds the accumulated water from four sides is formed on the rear side of the filth receiving surface of the bowl part, The filth receiving surface of the bowl portion is composed of a front region positioned in front of the vertical wall portion, a side region positioned laterally of the vertical wall portion, and a rear region positioned rearward of the vertical wall portion. The shelf located in the front region of the filth receiving surface is symmetrical in plan view and has a single curvature half In the flush toilet, formed on a shelf located on the opposite side of the first water discharger and rearward of the first water discharger, the wash water is placed rearward on the shelf of the bowl part. The second water discharger that forms a swirl flow in the same direction as the swirl flow by the first water discharger and the front area of the filth receiving surface of the bowl part in the center area in the width direction in the front-rear direction A region adjacent to the lateral direction of the convexly curved region of the front region is formed as a flat surface, and is a lateral region of the bowl portion filth receiving surface. Is formed in a concave curved shape along the lateral direction, and the filth-receiving surface of the bowl part continuously changes from a convex surface to a concave surface from its front region toward its side region, to a concave surface. When the rear region of the filth receiving surface of the part is formed to be curved in a convex shape along the vertical direction In addition, the first area of the filth receiving surface and the first area of the filth receiving surface are inclined downwardly more than the convex shape of the front area of the filth receiving surface, and by a part of the wash water discharged from the first water discharging section. The side area on the opposite side of the water discharger is washed, the rear area of the filth receiving surface is washed with a part of the wash water discharged from the second water discharger, and further the water discharged from the first water discharger The whole area of the bowl part is washed by washing the side area on the side of the first water discharging part of the filth receiving surface with the remaining part of the water and the remaining washing water discharged from the second water discharging part. Has been.

  According to the flush toilet of the present invention, it is possible to prevent filth from remaining on the bowl surface.

It is a top view which shows the flush toilet bowl by embodiment of this invention. It is sectional drawing seen along the II-II line of FIG. It is sectional drawing seen along the III-III line of FIG. It is sectional drawing seen along the IV-IV line of FIG. It is sectional drawing seen along the VV line of FIG. It is sectional drawing seen along the VI-VI line of FIG. It is an expanded sectional view which expands and shows the E section of FIG. It is a top view which shows washing | cleaning operation | movement of the flush toilet bowl by embodiment of this invention. It is a top view which shows the conventional flush toilet.

  Hereinafter, a flush toilet according to an embodiment of the present invention will be described with reference to the drawings. First, the basic structure of a flush toilet according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a plan view showing a flush toilet according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II in FIG.

  The flush toilet according to the embodiment of the present invention is a flush toilet bowl to which a wall is attached.

As shown in FIGS. 1 and 2, the flush toilet 1 is made of earthenware with a glaze layer formed on the surface, a skirt portion 2 is formed at the lower portion, and a bowl portion 4 is formed at the front of the upper half, A water conduit 6 is formed in the upper rear part, and a drain trap pipe 8 for discharging filth is formed in the lower rear part.
The water conduit 6 is connected to a water storage tank, which is a cleaning water source located on the upstream side, or a water pipe via a flush valve, and is supplied with cleaning water.

  The bowl portion 4 includes a bowl-shaped filth receiving surface 10, a rim portion 12 constituting an upper edge portion, a shelf portion 14 formed between the filth receiving surface 10 and the rim portion 12, and the filth receiving surface 10. The water storage part 16 formed below is provided. Here, the inner peripheral surface 12a of the rim portion 12 extends in a substantially vertical direction in front of the bowl portion 4 (see FIGS. 2 and 3), and has a shape that overhangs inward on the side of the bowl portion 4 ( 4 to 6). Further, as shown in FIG. 1, the shelf portion 14 is formed substantially horizontally (or slightly inwardly inclined), and is formed annularly on the entire circumference of the bowl surface 4. Further, as shown in FIGS. 1 and 2, the reservoir 16 is surrounded by the vertical wall 18 (front wall 18a, right side wall 18b, left side wall 18c, rear wall 18d) from all sides. It is like that.

  A first water discharge port 20 for discharging washing water is formed slightly rearward of the central portion on the left side when viewed from the front of the shelf 14 of the bowl portion 4, and a second water discharge port 22 is formed on the right rear side when viewed from the front. The first water outlet 20 and the second water outlet 22 form a swirl flow that swirls in the same direction (the counterclockwise direction in FIG. 1).

  Further, a jet spout 24 is formed at a position in the vertical wall portion 18 on the left side (side surface) when viewed from the front of the filth receiving surface 10 of the bowl portion 4. The jet water outlet 24 is formed above the position of the water storage surface L.

  The water conduit 6 formed in the upper rear part of the flush toilet 1 described above branches to the first water passage 28, the second water passage 30, and the third water passage 32, which are three water passages, toward the front of the toilet. doing. The first water passage 28 is for supplying cleaning water to the first water outlet 20, the second water passage 30 is for supplying cleaning water to the second water outlet 22, and The third water passage 32 is for supplying cleaning water to the jet outlet 24.

  Next, as shown in FIG. 2, the drain trap pipe 8 has an inlet 8 a that opens near the bottom of the bowl portion 4, and the highest position of the lower surface in the flow path of the drain trap pipe 8 ( The position of the water storage surface (initial water storage water level) L of the water storage section 16 of the bowl section 4 is determined at the upper end position) 8b.

  Next, the surface shape of the bowl portion of the flush toilet will be described with reference to FIGS. Here, FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1, FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 1, and FIG. 6 is a cross-sectional view taken along line -V, FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 1, and FIG. 7 is an enlarged cross-sectional view showing a portion E in FIG. is there.

  As shown in FIG. 1, the filth receiving surface 10 of the bowl portion 4 of the flush toilet 1 includes a front region 10 a located in front of the vertical wall portion 18 and a side located on the side (both sides) of the vertical wall portion 18. The rear areas 10b and 10c and the rear area 10c located behind the vertical wall 18 are provided. Each of these regions 10a, 10b, 10c, and 10d is shown as a region surrounded by a two-dot chain line in FIG.

  First, as shown in FIG. 3, the front region 10a of the filth receiving surface 10 of the bowl portion 4 is formed to be concavely curved along the lateral direction, but as shown in FIG. Along the line, it is curved in a convex shape. As shown in FIG. 7, the degree of curvature in the front region 10 a of the filth receiving surface 10 is the maximum amount of protrusion that protrudes vertically from the straight line A connecting the shelf 14 and the upper end of the front wall 18 a of the vertical wall 18. The shape is such that H is about 4.0 mm. The maximum protrusion amount is preferably in the range of 2.0 to 6.4 mm.

Further, the front region 10a of the filth receiving surface 10 is formed to be curved in a convex shape in the front-rear direction only in the center region in the width direction. Therefore, as shown in FIG. 4, the laterally outer region of the front region 10a is formed on a substantially flat surface.
In the present embodiment, the front region 10a of the filth receiving surface 10 may be formed to be curved in a convex shape in the front-rear direction in almost all the region.

  Next, as shown in FIGS. 5 and 6, the side regions 10 b and 10 c of the front region 10 a of the filth receiving surface 10 are formed to be curved in a concave shape along the lateral direction in the entire region. .

  Furthermore, as shown in FIG. 2, the rear region 10d of the front region 10a of the filth receiving surface 10 is formed to be curved in a convex shape along the vertical direction (also the front-rear direction) in the entire region.

  Next, the shape of the shelf part 14 of the bowl part 4 is demonstrated. As shown in FIG. 1, the portion of the shelf 14 located in the front region 10 a of the filth receiving surface 10 is substantially bilaterally symmetric and formed with substantially the same radius of curvature R <b> 1. In other words, the shelf portion 14 is formed in a substantially circular arc shape.

  Next, with reference mainly to FIG. 8, the washing | cleaning operation | movement by the flush toilet 1 by this embodiment is demonstrated. First, wash water is introduced into the water conduit 6 from a wash water source such as an upstream water storage tank. The washing water of the introduction pipe 6 flows in a divided manner into the first water passage 28, the second water passage 30, and the third water passage 32 on the downstream side.

  The washing water that has flowed out to the first water passage 28 is discharged from the first water outlet 20 onto the shelf 14. The washing water that has flowed out into the second water passage 30 is similarly discharged from the second water discharge port 22 onto the shelf 14. Furthermore, the wash water that has flowed out to the third water passage 32 is discharged downward from the jet water discharge port 24 toward the bottom surface of the water reservoir 16.

  The washing water discharged from the first water discharge port 20 flows so as to form a swirling flow along the shelf portion 14 formed in an arc shape. This swirling flow forms one main flow M, and a necessary amount of washing water reaches the side region 10 c of the filth receiving surface 10. If it demonstrates concretely, since the washing | cleaning water discharged from the 1st spout 20 is formed by curving the front area | region 10d of the filth receiving surface 10 in convex shape along the front-back direction, The amount of washing water flowing down to the filth receiving surface 10 near the front end is smaller than that of a conventional flush toilet that has been formed in a concave shape, so that much washing water passes through the front end of the shelf 10. The side region 10c located on the opposite side of the first water discharger 20 is reached, and the side region 10c of the filth receiving surface 10 is formed in a concave shape along the lateral direction. A sufficient amount of washing water can flow through the side region 10c. As a result, in the conventional flush toilet, there was a waste remaining area (area indicated by S in FIG. 8) in which the waste adhered to the side area 10c, but the flush toilet 1 according to the present embodiment. According to this, it is possible to prevent the filth from remaining on the side region 10c of the filth receiving surface 10 while remaining.

  Similarly, the wash water discharged from the second water discharge port 22 flows so as to form a swirling flow along the shelf portion 14 formed in an arc shape, and reaches the side region 10 b of the filth receiving surface 10. It has become. Since a part of this swirl flow is formed such that the rear region 10d of the filth receiving surface 10 is curved in a convex shape in the front-rear direction, a relatively large amount of washing water flows down the rear region 10d and the rear region 10d. Is supposed to be washed.

  As shown in FIG. 6, the wash water discharged from the jet water discharge port 24 becomes a stirring flow that circulates in the vertical direction.

  At the start of cleaning, heavy waste is sinking in the reservoir 16 and floating waste is floating on the water surface of the reservoir 16 and in the water. The surface of the water in the bowl portion 4 rises due to the washing water discharged from the first water outlet 20, the second water outlet 22, and the jet outlet 24 described above, and the heavy filth from the jet outlet 24. It is in a state of being separated by the up and down agitating flow, and is pushed into the drain trap pipe 8 and is further swept away by the flowing water action due to the water drop. At this time, the floating filth is also pushed into the trap pipe 8 and discharged.

Next, the effect by the flush toilet 1 by this embodiment is demonstrated.
First, in the flush toilet 1 according to the present embodiment, the wash water is discharged forward from the first water discharge unit 20, and this wash water swirls on the shelf 14, which becomes one mainstream M, Since the outer peripheral side of the filth receiving surface 10 is swung, the filth receiving surface 10 can be washed out evenly. Specifically, since the front region 10a of the filth receiving surface 10 is formed to be convexly curved along the front-rear direction, the amount of washing water flowing down to the filth receiving surface near the front end of the shelf 10 is small. Accordingly, a large amount of washing water passes through the front end of the shelf, reaches the side region 10c opposite to the first water discharger, and the side region 10d is concave along the lateral direction. Since it is formed in a curved manner, it is possible to flow a sufficient amount of washing water to the side region 10c, and therefore it is possible to prevent filth from adhering to the side region 10c.

  Further, in the flush toilet 1 according to the present embodiment, the wash water discharged from the first water discharge unit 20 is formed in a substantially bilaterally symmetric and substantially the same radius of curvature (that is, a substantially circular arc shape). It is more effective to form one main flow M reliably and thereby leave the filth adhered to the side region 10c, because it swivels on the shelf 14 located in the front region 10a). Can be prevented.

  Moreover, in the flush toilet 1 by this embodiment, when almost all the area | regions of the front area of the filth receiving surface of a bowl part are formed in convex shape, the wash water discharged from the 1st spout 20 is One main flow is reliably formed, and thereby it is possible to more effectively prevent the filth from remaining on the side region 10c.

  Further, in the flush toilet 1 according to the present embodiment, the rear region 10d of the filth receiving surface 10 is formed to be curved in a convex shape along the vertical direction, so that the washing water is in the rear region 10d of the filth receiving surface 10 The cleaning water is easy to fall, and it is possible to prevent the filth from remaining in the rear region 10d.

  Furthermore, in the flush toilet 1 according to the present embodiment, the rear region of the filth receiving surface can be reliably washed with the wash water discharged from the second water discharge unit 22.

Although the flush toilet mentioned above is provided with the 1st spout and the 2nd spout, the present invention is applicable also to the flush toilet provided with only the 1st spout. In this case, the amount of washing water discharged from the first water outlet increases, and one main flow turns and flows to the position of the first water outlet.
Furthermore, although embodiment mentioned above is an example which applied this invention to the wash-out type flush toilet, this invention is applicable also to flush toilets of other systems, such as a siphon type flush toilet.

DESCRIPTION OF SYMBOLS 1 Flush toilet 4 Bowl part 6 Water guide part 8 Drain trap pipe 10 Soil receiving surface 12 Rim part 14 Shelf part 16 Reservoir part 18 Vertical wall part 20 1st water outlet 22 2nd water outlet 24 Zet water outlet 28 1st Water channel 30 Second water channel 32 Third water channel 34 Inlet 36 Ascending channel 38 Descent channel M Mainstream L Reservoir surface (initial accumulated water level)

Claims (1)

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 first water discharge portion formed at a central portion in the front-rear direction on one side portion of the bowl portion, and forming a swirl flow by discharging the wash water forward on the shelf portion of the bowl portion;
A drain trap line for connecting the inlet to the lower part of the bowl part and discharging the filth,
A vertical wall that surrounds the stored water from all sides is formed on the rear side of the bowl portion of the filth receiving surface,
The filth receiving surface of the bowl portion includes a front region positioned in front of the vertical wall portion, a side region positioned laterally of the vertical wall portion, and a rear region positioned rearward of the vertical wall portion. Become
In the flush toilet, wherein the shelf located in the front region of the bowl portion of the filth receiving surface is symmetrical in plan view and formed with a single radius of curvature,
It is formed in a shelf located on the opposite side of the first water discharger and rearward of the first water discharger, and the wash water is discharged backward on the shelf of the bowl part to discharge the first A second water discharge unit that forms a swirl flow in the same direction as the swirl flow by the water discharge unit;
The front region of the bowl portion filth receiving surface is formed in a convex shape along the front-rear direction in the center region in the width direction, and in the lateral direction of the region formed by the convex shape of the front region. The adjacent area is formed with a flat surface,
A side region of the bowl portion filth receiving surface is formed to be curved in a concave shape along the lateral direction,
The filth receiving surface of the bowl part continuously changes from a convex surface to a concave surface through a flat surface from the front region toward the side region,
The rear region of the bowl portion of the filth receiving surface is formed to be curved in a convex shape along the vertical direction, and is inclined downwardly more greatly than the convex shape of the front region of the filth receiving surface,
The front region of the filth receiving surface and the side region opposite to the first water discharging portion of the filth receiving surface are washed with a part of the washing water discharged from the first water discharging portion, and the second water discharging The rear area of the waste receiving surface is washed with a part of the washing water discharged from the section, and the remaining washing water discharged from the first water discharging section and the washing water discharged from the second water discharging section A flush toilet configured to wash the entire region of the bowl portion by washing a lateral region of the waste receiving surface on the side of the first water discharge portion with the remaining portion.

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