JP5740788B2 - Flush toilet - Google Patents

Description

  The present invention relates to a flush toilet, and more particularly, to a flush toilet that forms a swirl flow to wash and discharge waste.

  Conventionally, for example, as described in Patent Document 1, a bowl-shaped filth-receiving surface, a rim portion that is an upper edge portion and an inner peripheral surface thereof overhangs inward, and the rim portion A flush toilet equipped with a bowl part provided with a shelf formed between the sewage receiving surface and a drainage channel connected to the lower part of the bowl part for discharging sewage by siphon action is known. ing.

  The flush toilet described in Patent Document 1 includes a first water discharge part that spouts wash water on the shelf part of the bowl part to form a swirling flow, and a first water discharge part on the shelf part of the bowl part. A second water discharge unit that discharges wash water in the same direction as the swirl direction of the swirl flow, a first water passage that supplies wash water from the wash water tank to the first water discharge unit, and an upper portion of the first water discharge unit And a second water passage that is formed inside the rim portion and supplies the wash water from the wash water tank to the second water discharge portion.

Republished patent WO2004 / 022862

  In the flush toilet described in Patent Document 1 described above, the wash water discharged from the first water discharge portion and the second water discharge portion to the shelf turns in the same direction along the inner peripheral surface of the rim portion. It is supposed to be. In this flush toilet, in order to prevent the wash water discharged from the second water discharge unit from colliding with the wash water discharged from the first water discharge unit and splashing over the rim, The tip portion of the second water passage that is supplied to the second water discharge portion has a U-turn shape, thereby reducing the flow rate of the wash water discharged from the second water discharge port and preventing the above-described scattering. It was.

  However, in order to improve the cleanability of the bowl portion of the flush toilet, it is desirable that the inner peripheral surface of the rim portion is not overhanging or the degree of overhang is small. Thus, in the case where the inner peripheral surface of the rim part is not overhanged, just by making the tip part of the second water passage into a U-turn shape like the flush toilet of Patent Document 1, The cleaning water discharged from the second water discharge port cannot be prevented from colliding (interfering) with the cleaning water discharged from the first water discharging port and splashing over the rim portion, and further improvement Was necessary.

  Accordingly, the present invention was made to solve the problems of conventional flush toilets, and washes that prevented flushing water from splashing beyond the rim and improved the cleanability of the toilet bowl. The purpose is to provide toilets.

In order to achieve the above object, the present invention is a flush toilet that flushes toilets with washing water supplied from a water supply source and discharges wastes, and has a bowl-shaped waste receiving surface and an upper edge portion. A rim portion to be configured, a shelf portion formed between the rim portion and the filth receiving surface, a bowl portion provided with a drainage passage to which the inlet is connected below the bowl portion and discharges filth, A first spouting part that is located on the rear side of one side centered on the front-rear direction of the bowl part and that spouts wash water onto the shelf part of the bowl part to form a swirling flow; A second water discharge unit that is located downstream from the water discharge unit and discharges the wash water on the shelf to form a swirl flow in the same direction as the swirl flow by the first water discharge unit, and the wash water from the water supply source A first water passage that supplies water to the first water discharge portion, and a second water passage that supplies wash water from the water supply source to the second water discharge portion. And a second water flow path is a flow rate suppression unit that reduces the flow rate of the wash water, and the wash water whose flow rate is reduced by the flow rate suppression unit toward the second water discharge unit with respect to the shelf unit And an inclined portion that is supplied in a direction inclined to the bowl portion side in plan view, and the flow rate suppressing portion is a step portion that is formed in the second water passage and extends in the vertical direction .
In the present invention configured as described above, the flow rate of the wash water flowing through the second water passage is reduced by the flow rate suppression unit, and then the wash water having the reduced flow rate is supplied to the wash water by the inclined unit. Since it is supplied in a direction inclined to the bowl part side in plan view with respect to the shelf part, the wash water discharged from the second water discharge part is compared with the conventional one having only the component in the swirl direction The component in the swivel direction becomes smaller and the component in the center direction of the bowl portion becomes larger, so that the wash water discharged from the second water discharge portion collides with the wash water discharged from the first water discharge portion (interference). ) And can be prevented from scattering beyond the rim. Furthermore, in the present invention, since the step portion formed in the second water passage becomes a resistance and the flow rate of the washing water decreases, the washing water discharged from the second water discharge portion is discharged from the first water discharge portion. It is possible to suppress collision (interference) with the cleaning water to be scattered and scattering over the rim portion.

In the present invention, preferably, the inner peripheral surface of the rim portion of the bowl portion is formed by a flat surface extending in a substantially vertical direction from the shelf portion.
In the present invention configured as described above, since the inner peripheral surface of the rim portion of the bowl portion is formed by a flat surface extending substantially vertically from the shelf portion, the rim portion is more than the one formed by overhanging. , Cleaning performance is improved.

  According to the flush toilet of the present invention, it is possible to prevent the wash water from splashing beyond the rim portion and improve the cleanability of the toilet.

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. 1 (a water storage tank is abbreviate | omitted). It is the fragmentary sectional view seen along the IV-IV line of FIG. It is the fragmentary sectional view seen along the VV line of FIG. It is the fragmentary sectional view seen along the VI-VI line of FIG.

  Hereinafter, a flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings. First, the basic structure of a flush toilet according to an embodiment of the present invention will be described with reference to FIGS. Here, FIG. 1 is a plan view showing a flush toilet according to the first embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. FIG. 4 is a cross-sectional view taken along line III-III (a water storage tank is omitted), and FIG. 4 is a partial cross-sectional view taken along line IV-IV in FIG.

  As shown in FIGS. 1 to 4, the flush toilet 1 according to the present embodiment is made of earthenware having a glaze layer formed on the surface, a skirt portion 2 is formed at the lower portion, and a bowl is placed at the front of the upper half portion. A portion 4 is formed, and a water conduit 6 is formed in the upper rear portion, and a drain passage 8 is formed in the lower rear portion for discharging waste by siphon action. Further, a water storage tank 10 communicating with the water conduit 6 is provided at the upper rear portion of the flush toilet 1. In addition, a drain valve 11 is provided in the water storage tank 10 and is opened and closed by an operation lever (not shown). In addition, the present invention can be applied to a flush toilet or the like having a flush valve, for example, using the pressure of tap water, in addition to a flush toilet having a water storage tank.

  The bowl portion 4 includes a bowl-shaped filth receiving surface 12, a rim portion 14 constituting an upper edge portion, and a shelf portion 16 formed between the filth receiving surface 12 and the rim portion 14. Here, the inner side surface 14a of the rim portion 14 is formed by a flat surface (smooth plane) extending substantially vertically from the shelf portion 16 so that there is no blind spot when viewed from above.

  An inlet 8a of a drainage channel 8 is opened at the center of the filth receiving surface 5 of the bowl portion 4 below the surface of the stored water. A path (vertical pipe) 8c is continuous, and a lower end of the descending path 8c is connected to a discharge pipe (not shown) via a joint (not shown).

  Further, on the left rear side as seen from the front of the bowl portion 4 of the flush toilet 1, a first water outlet 18 for discharging washing water on the shelf portion 16 and a right side as seen from the front of the bowl portion 4. On the rear side, a second water discharge port 20 for discharging washing water is formed on the shelf 16, and the first water discharge port 18 and the second water discharge port 20 are swirling in the same direction (plan view). Counterclockwise).

  Further, the bowl portion 4 of the flush toilet 1 has a slit-shaped side on the left side (side surface of the bowl portion) as viewed from the front at a position above the reservoir surface of the bowl portion 4 and below the shelf portion 16. Zet holes 22 are formed. The washing water discharged from the side jet hole 22 flows toward the inlet 8a of the drainage channel 8, and the filth is efficiently pushed into the drainage channel 8.

  The water conduit 6 supplies wash water to the three water passages, that is, the first water passage 24 that supplies the wash water to the first water outlet 18 and the second water outlet 20 toward the front of the toilet. The second water passage 26 branches to a third water passage 28 that supplies cleaning water to the side jet holes 22. In addition, when the side jet hole is formed, effective cleaning is possible, but the cleaning water is discharged onto the shelf portion 16 from only the first water outlet 18 and the second water outlet 20, and this side You may make it not provide a zet hole.

  Next, the detailed structure of the second water passage 26 of the flush toilet 1 according to this embodiment will be described with reference to FIGS. 5 and 6 in addition to FIGS. 1 to 4. 5 is a partial cross-sectional view taken along line VV in FIG. 4, and FIG. 6 is a partial cross-sectional view taken along line VI-VI in FIG.

  First, the second water passage 26 is directed from the upstream side toward the second water outlet 20 on the downstream side, the enlarged straight water passage 26 a, the step portion 26 b extending in the vertical direction, and the swirling flow of the wash water in the bowl portion 4. The flat water passage 26c for flowing the cleaning water in the direction opposite to the direction of the vertical direction, the vertical water passage 26d for extending the vertical direction and flowing the cleaning water downward, and the bowl portion 4 in plan view with respect to the shelf 16 And an inclined water passage 26e for supplying the cleaning water in a direction inclined to the side and flowing the cleaning water in substantially the same direction as the direction of the swirling flow of the cleaning water in the bowl portion 4. The vertical water passage 26 d and the inclined water passage 26 e are formed as a part of the inner peripheral surface 14 a of the rim portion 14 near the second water discharge port 20.

  Here, in the 2nd water flow path 26, the step part 26b adjusts the flow volume of the washing | cleaning water which flows into the 2nd water discharge port 20, and also is a flow-rate suppression part, and a fluid resistance is caused by a collision of washing water. As a result, the flow rate of the washing water decreases. Further, the flat water passage 26c, the vertical water passage 26d, and the inclined water passage 26e constitute a bent portion (= flow velocity suppressing portion) where the flow of the washing water is bent, and pressure loss is generated at the bent portion. The flow rate of the washing water is reduced.

  Furthermore, as shown in FIG. 5, the flow velocity V of the cleaning water supplied from the second water passage 26 to the second water outlet 20 passes through the inclined water passage 26e from the vertical water passage 26d and passes through the second water outlet 26e. 20, water is discharged in a direction inclined by an angle θ toward the bowl portion 4 in a plan view with respect to the shelf portion 16. Therefore, the washing water flow velocity V has a swirl direction component Vx and a bowl portion center direction component Vy, which is second compared to the conventional one (the wash water flow velocity has only the swirl direction component). The component in the swirling direction of the wash water discharged from the water discharge port 20 of the water becomes smaller and the component in the center direction of the bowl portion becomes larger. The cleaning water swirl direction component Vx and the bowl portion center direction component Vy can be adjusted by the size of the length L (see FIG. 6) along the inner circumferential surface of the rim portion 14 of the inclined water passage 26e. it can. In the present embodiment, the component Vy in the center direction of the bowl portion is increased by making the length L relatively short.

Next, the operation of the flush toilet according to the above-described embodiment of the present invention will be described.
First, the basic operation of the flush toilet will be described. First, when an operation lever (not shown) for toilet flushing is operated, the drain valve 11 provided in the water storage tank 10 opens, and the cleaning water in the water storage tank 10 flows into the water conduit 6, and the water conduit 6 diverges into the first water passage 24, the second water passage 26, and the third water passage 28.

  The washing water that has flowed into the first water passage 24 reaches the first water outlet 18 and is discharged from the first water outlet 18 onto the shelf 16. The washing water that has flowed into the second water passage 26 reaches the second water outlet 20 through the second water passage 26 described above, and obliquely extends from the second water outlet 20 onto the shelf 16. Is discharged. The wash water that has flowed into the third water passage 28 reaches the side jet hole 22 and is ejected from the side jet hole 22 so as to stir the accumulated water in the bowl portion 4 in the vertical direction and at the inlet of the drainage passage 8. It spouts toward 8a.

  In the flush toilet 1 according to the present embodiment, the region between the first water outlet 18 and the second water outlet 20 of the bowl portion 4 is washed with the washing water discharged from the first water outlet 18, Further, the second water discharge port 20 of the bowl portion 4 and the first downstream of the first water discharge port 20 are caused by the wash water discharged from the second water discharge port 20 and a part of the wash water discharged from the first water discharge port 18. The area between the water outlets 20 is washed. Thus, according to the present embodiment, the entire area of the bowl portion 4 can be effectively cleaned with the cleaning water discharged from the first water outlet 18 and the second water outlet 20. It has become.

Further, since the wash water discharged from the first water outlet 18 and the second water outlet 20 in the bowl portion 4 becomes a counterclockwise swirling flow, the filth in the bowl portion 4 Gathering near the center, the suction force due to the siphon action of the drainage channel 8, the stirring force for stirring the accumulated water in the bowl portion 4 from the side jet hole 22 in the vertical direction, and the pushing force due to the flow toward the inlet 8 a of the drainage channel 8 Thus, the water is effectively sent to the inlet 8a of the drainage channel 8 and discharged from the drainage channel 8 to the outside.
The present invention can be applied to a flush toilet that does not use the siphon action, in addition to the toilet bowl that discharges filth by the siphon action described above.

  Next, in this embodiment, the flow rate of the washing water flowing through the second water passage 26 is the step portion 26b, the flat water passage 26c, the vertical water passage 26d, and the inclined water passage 26e. After the flow is lowered by the bent part, the washing water whose flow velocity is lowered is flat with respect to the shelf part 16 by directing the washing water toward the second outlet 20 by the vertical water passage 26d and the inclined water passage 26e. Since it is supplied in a direction inclined to the bowl part 4 side as viewed, the wash water discharged from the second water discharge port 20 has a swirl direction component Vx as compared to the conventional swirl direction component Vx alone. And the component Vy in the central direction of the bowl portion increases, so that the cleaning water discharged from the second water outlet 20 collides (interferes) with the cleaning water discharged from the first water outlet 18. To fly over the rim. It is possible to win.

  In the present embodiment, the bent portion is formed in the second water passage 26 by the above-described flat water passage 26c, the vertical water passage 26d, and the inclined water passage 26e. Loss can be generated and the flow rate of washing water can be reduced more effectively.

  Moreover, in this embodiment, since the step part 26b is formed in the 2nd water flow path 26, this step part 26b becomes resistance, and can reduce the flow velocity of washing water more effectively.

  Furthermore, in the present embodiment, the inner peripheral surface 14a of the rim portion 14 of the bowl portion 4 is formed by a flat surface extending in a substantially vertical direction from the shelf portion 16, so that disposable paper or the like is used for cleaning. Since the inner surface 14a can be easily wiped off, the cleaning performance is improved as compared with the conventional rim portion formed by overhanging.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Skirt part 4 Bowl part 6 Conveyance path 8 Drainage path 8a Inlet 10 Reservoir tank 11 Drain valve 12 Soil receiving surface 14 Rim part 14a Inner side surface 16 Shelf part 18 First outlet 20 Second outlet 22 Side set hole 24 First water passage 26 Second water passage 26a Expanded linear water passage 26b Stepped portion 26c Flat water passage 26d Vertical water passage 26e Inclined water passage 28 Third water passage

Claims (2)

A flush toilet that flushes toilets with wash water supplied from a water supply source and discharges filth,
A bowl portion including a bowl-shaped filth receiving surface, a rim portion constituting an upper edge portion, and a shelf portion formed between the rim portion and the filth receiving surface;
A drainage channel where the inlet is connected to the bottom of the bowl portion and discharges filth,
A first water discharge part which is located on the rear side of one side centered on the front-rear direction of the bowl part and discharges washing water onto the shelf part of the bowl part to form a swirling flow;
The 2nd water discharging part which is located in the downstream rather than the 1st water discharging part of the said bowl part, discharges washing water on the said shelf part, and forms the swirling flow of the same direction as the swirling flow by the said 1st water discharging part When,
A first water passage for supplying wash water from the water supply source to the first water discharger;
A second water passage for supplying wash water from the water supply source to the second water discharge unit,
The second water passage includes a flow rate suppressing unit that decreases the flow rate of the cleaning water, and the cleaning water that has been decreased in flow rate by the flow rate suppressing unit toward the second water discharge unit in a plan view with respect to the shelf. A flush toilet , wherein the flow rate suppressing portion is a step portion formed in the second water passage and extending in the vertical direction. .   The flush toilet according to claim 1, wherein an inner peripheral surface of the rim portion of the bowl portion is formed by a flat surface extending in a substantially vertical direction from the shelf portion.

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