JP5804242B2 - 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 to the shelf turns along the inner peripheral surface of the rim portion. Here, in order to improve the cleanability of the bowl part of the flush toilet, it is desirable that the inner peripheral surface of the rim part is not overhanging or the degree of overhanging is small. However, in the case where the inner peripheral surface of the rim portion is not overhanged, the cleaning water discharged from the first water discharge portion scatters outside beyond the rim portion, so such a structure is adopted. It was difficult to do.

  Furthermore, in the flush toilet of Patent Document 1 described above, since the second water passage for supplying the wash water to the second water discharge portion is formed inside the rim portion above the first water discharge portion, Due to the energy loss and the head generated in the second water passage, the flow rate of the cleaning water discharged from the second water discharge portion is lowered, and this causes a problem that the bowl surface on the downstream side cannot be sufficiently cleaned. It was.

  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. A second water passage is formed inside the rim portion outside the first water discharge portion, and the second water discharge portion is located on the other side centered on the front-rear direction of the bowl portion. It is characterized in that it is arranged in the vicinity of the position of the shelf that changes from a small curvature radius of the bowl portion to a large curvature radius on the front side.
In the present invention configured as described above, the second water passage for supplying the wash water from the water supply source to the second water discharge portion is formed inside the rim portion outside the first water discharge portion. In addition, the flow rate of the wash water can be guided to the second water discharge part without reducing the flow rate as much as possible, and the front and rear direction of the bowl part, which is the region where the wash water discharged from the first water discharge part is most likely to scatter, is centered. Since the second water discharger is disposed in the vicinity of the position of the shelf that changes from the small curvature radius of the bowl portion to the large curvature radius on the front side of the other side, the washing discharged from the first water discharger Water is induced by the wash water discharged from the second water discharge part, and thereby, the wash water discharged from the first water discharge part can be prevented from scattering beyond the rim part.

In this invention, Preferably, the 1st water discharging part is provided with the opening flat in the horizontal direction.
In the present invention configured as described above, since the upward flow component of the wash water discharged from the first water discharge portion can be minimized, the wash water discharged from the first water discharge portion is removed from the rim. It is possible to more effectively suppress scattering beyond the part.

In this invention, Preferably, the 2nd water flow path is formed in the same level as a 1st water discharging part.
In the present invention configured as described above, since the second water passage is formed at the same level as the first water discharge section, energy loss is reduced when the wash water flows through the second water passage, Thereby, the flow rate of the wash water discharged from the second water discharge unit can be maintained at a desired value.

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.

In this invention, Preferably, it has the 3rd water flow path which supplies the wash water from a water supply source to the jet hole provided in the location facing a drainage channel, and this 2nd water flow path , Formed downstream from an opening formed in a part of the third water passage.
According to the present invention configured as described above, since the first water passage and the second water passage can be formed independently, the cleaning supplied to the first water discharge portion and the second water discharge portion. The amount of water can be accurately distributed.

  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 sectional drawing seen along the VV line of FIG. It is sectional drawing seen along the VI-VI line of FIG. It is the top view which showed the position of the bowl part (shelf part) of the flush toilet bowl by embodiment of this invention by arbitrary positions # 0- # 15. It is a top view which shows the flush toilet bowl by other embodiment of this invention. It is the fragmentary sectional view seen along the IX-IX line of FIG. FIG. 9 is a partial cross-sectional view taken along line XX in FIG. 8.

  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. It is sectional drawing seen along the III-III line (a water storage tank is abbreviate | omitted).

  As shown in FIGS. 1 to 3, 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 using a pressure of tap water, for example, a flush toilet equipped with a flush valve, in addition to a flush toilet provided with 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 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, and an ascending channel 8b extends rearward from the inlet 8a and descends into the ascending channel 8b. 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, the flush toilet 1 is provided with a jet hole 18 for efficiently pushing filth into the drainage channel 8 at a location facing the inlet 8 a of the drainage channel 8.

The water conduit 6 has three water passages toward the front of the toilet, that is, a first water passage 24 for supplying washing water to a first water outlet 20 which will be described later in detail, and a second water outlet 22 which will be described later. It branches into the 2nd water flow path 26 which supplies washing water to 3rd, and the 3rd water flow path 28 which supplies washing water to the jet hole 18 mentioned above. Specifically, the water conduit 6 is connected to the first water passage (which is also a common water passage 25 of the first water passage and the second water passage) 24 and the third water passage 28 on the downstream side thereof. Next, the second water passage 26 is connected to the first water passage 24 (the downstream side of the common water passage 25 (specifically, the upstream end 14c of the partition wall 14b of the rim portion 14 described later)). Yes.
Here, an air vent hole 30 is formed on the downstream side of the water conduit 6 so that air in the water conduit 6 can be discharged from the first water outlet 20 to the outside.

  Next, the detailed structure of the flush toilet 1 according to the present embodiment will be described with reference to FIGS. 4 to 7 in addition to FIGS. 4 is a partial cross-sectional view taken along line IV-IV in FIG. 1, FIG. 5 is a cross-sectional view taken along line VV in FIG. 1, and FIG. FIG. 7 is a cross-sectional view taken along line VI, and FIG. 7 is a plan view showing the position of the bowl (shelf) of the flush toilet according to the embodiment of the present invention by arbitrary positions # 0 to # 15.

  First, the positions of the first water outlet 20 and the second water outlet 22 will be described with reference to FIG. In FIG. 7, the position of the shelf portion 16 is indicated by # 0 to # 15 counterclockwise. The position of each position is arbitrary, the position of the first water outlet 20 is # 0, the position of the second water outlet 22 is # 10, the position of the front end of the bowl portion 4 is # 7, and the rear of the bowl portion 4 The position of the end is shown as # 15.

  The bowl portion 4 (shelf portion 16) has a substantially elliptical shape, and the left side and the right side are symmetrical when viewed from the front. In general, the region of # 12 to # 2 of the shelf portion 16 is provided. In the regions # 5 to # 9, the radius of curvature is relatively small, while in the regions # 2 to # 5 and # 9 to # 12 of the shelf 16, the radius of curvature is relatively large. Further, the region of # 3 to # 11 of the shelf portion 16 is the front side of the bowl portion 4, and the region of # 11 to # 3 of the shelf portion 16 is the rear side of the bowl portion 4.

  If the arrangement positions of the first water outlet 20 and the second water outlet 22 are described in relation to the size of the radius of curvature of the bowl portion 4, the first water outlet 20 is centered on the front-rear direction of the bowl portion 4. The second spout 22 is disposed at the position # 0 of the shelf 16 which is a region of a small radius of curvature located on the rear side of the bowl portion 4 on one side (left side in front view in FIG. 7). The bowl portion 4 on the other side (right side) is disposed in a region (# 10) in the vicinity of the position (# 9) of the shelf portion 16 (# 9) that changes from a small radius of curvature to a large radius of curvature.

  In this embodiment, in addition to these positions, the first spout 20 is an area between # 0 and # 2 of the shelf 16, and the second spout 22 is # 9 of the shelf 16. It may be arranged in a region between .about. # 11.

  Next, with reference to FIG. 4, the opening shape of the 1st water discharge port 22 is demonstrated. The first water discharge port 22 includes an opening 22a that is flat in the horizontal direction, and the bottom surface of the opening 22a is substantially horizontal.

  Next, with reference to FIG. 1 and FIGS. 4 to 6, the second water passage 26 for supplying cleaning water to the second water discharge port 22 will be described. As shown in FIG. 4, the second water passage 26 is at the same level as the first water outlet 20, and the first water outlet 20 is provided via a partition wall 14 b provided in the rim portion 14 of the bowl portion 4. It is formed outside. In addition, as shown in FIGS. 1, 5, and 6, the second water passage 26 is formed inside the rim portion 14, extends in the counterclockwise direction, and extends to the position of the second water discharge port 22. ing. The level of the second water passage 26 is the same from the front end to the rear end, and is formed so as to reduce energy loss.

  Here, as described above, the inner peripheral surface of the rim portion 14 is formed by a flat surface (smooth plane) extending in a substantially vertical direction from the shelf portion 16, but the present embodiment is not limited to this shape. A flat surface with a small degree of overhang may be used.

  In the above-described embodiment, the zet hole 18 is formed to enable effective cleaning. However, the cleaning water is supplied onto the shelf portion 16 only from the first water outlet 20 and the second water outlet 22. The water may be discharged and the jet hole 18 may not be provided.

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. In addition, as shown in FIG. 1, the second water passage 26 is branched from the upstream region of the first water passage 26.

  The washing water that has flowed into the first water passage 24 reaches the first water outlet 20 and is discharged from the first water outlet 20 onto the shelf 16. The wash water that has flowed into the second water passage 24 reaches the second water discharge port 22 through the space inside the rim portion 14, and is discharged from the second water discharge port 22 onto the shelf 16. The wash water flowing into the third water passage 28 reaches the jet hole 18 and is jetted from the jet hole 18 toward the inlet 8 a of the drainage channel 8.

  In the flush toilet 1 according to the present embodiment, the region from # 0 of the bowl portion 4 through the front end # 7 to the region of # 10 is washed by the wash water discharged from the first water outlet 20, and further, The remaining regions # 10 to # 0 are cleaned by the wash water discharged from the second water discharge port 22 and a part of the wash water discharged from the first water discharge port 20. Thus, according to the present embodiment, the entire region of the bowl portion 4 can be effectively cleaned with the cleaning water discharged from the first water outlet 20 and the second water outlet 22. It has become.

  Further, since the wash water discharged from the first water discharge port 20 and the second water discharge port 22 in the bowl portion 4 becomes a counterclockwise swirling flow, the filth in the bowl portion 4 Collected in the vicinity of the center and effectively sent to the inlet 8a of the drainage channel 8 by the suction force due to the siphon action of the drainage channel 8 and the pushing force due to the flow from the jet hole 18 toward the inlet 8a of the drainage channel 8, It is designed to be discharged from the outside.

(Claim 1)
Next, the reason why the second water outlet 22 is provided at the position # 10 (region of # 9 to # 11) of the shelf 16 will be described. As shown in FIG. 7, the wash water discharged from the first water discharge port 20 flows in the bowl portion 4 as indicated by arrows A1, A2, and A3. The flow of the arrow A1 flows on the shelf 16, the flow of the arrow A2 flows in a slightly lower region, and the flow of the arrow A3 flows in a further lower region.
Moreover, the wash water (arrow B1) flowing through the second water passage 26 becomes a flow indicated by the arrow B2 at the second water discharge port 22, and flows along the curvature shape.

  Here, if the second water discharge port 22 does not exist, the flow of the arrows A1 and A2 swirls along the curvature shape of the bowl portion 4 and flows. However, since the flow of the arrow A3 is a flow in a substantially vertical direction toward the rim portion 14, it will be scattered outside the toilet beyond the rim portion 14 as indicated by the broken line arrow A4.

  However, in the present embodiment, the second water discharge is located at the position # 10 (region of # 9 to # 11) of the shelf 16 where the wash water discharged from the first water discharge port 20 is most likely to be scattered. Since the water port 22 is provided, the flow of the cleaning water indicated by the arrow A3 is induced by the flow indicated by the arrow B2 that is the flow of cleaning water discharged from the second water discharge port 22, and the arrow along the curvature shape of the bowl portion 4 It flows like A5.

  Thus, in the present embodiment, it is effective that the cleaning water discharged from the first water outlet 22 is scattered over the rim portion 14 by the water discharged from the second water outlet 22. Can be suppressed.

  Next, in this embodiment, since the 1st spout 20 is provided with the opening 20a flat in the horizontal direction as mentioned above, the upward direction of the wash water spouted from the 1st spout 20 Since the flow component can be eliminated as much as possible, it is possible to more effectively suppress the washing water discharged from the first water discharge port 20 from being scattered beyond the rim portion 14.

  Next, in this embodiment, since the 2nd water flow path 26 which supplies washing water to the 2nd water outlet 22 is formed in the same level as the 1st water outlet 20, washing water is 2nd. Energy loss is reduced when the water flow path 26 flows, whereby the flow rate of the wash water discharged from the second water discharge port 22 can be maintained at a desired value.

  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.

Next, a flush toilet according to another embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a plan view showing a flush toilet according to another embodiment of the present invention, FIG. 9 is a partial cross-sectional view taken along line IX-IX in FIG. 8, and FIG. It is the fragmentary sectional view seen along the X-ray.
Since the basic structure of the flush toilet according to another embodiment is the same as the flush toilet shown in FIGS. 1 to 7 described above, the same parts are denoted by the same reference numerals, and description thereof is omitted.

  In the flush toilet according to this other embodiment, the structure of the second water passage 26 for supplying wash water to the second water discharge port 22 is different from that of the above-described embodiment, and the above-described third embodiment. The structure is branched from the middle of the water passage 28. Specifically, the second water passage 26 is branched from the third water passage 28 by an opening 26 a formed on the upstream wall surface of the third water passage 28 for supplying the cleaning water to the zette hole 18. A communication portion 26b that communicates with the opening 26a, is formed in the rim portion 14 and at a position lower than the level of the first water passage 24, and is connected to the communication portion 26b and is connected to the first rim portion 14 The water passage 26c is formed at the same level as the water passage 24, and the communication portion 26b and the water passage 26c are connected to each other through a slight rising slope portion 26e.

In order to exhibit a good cleaning effect, it is preferable to accurately distribute the amount of cleaning water to the first water passage 24 and the second water passage 26. In the present embodiment, first, the first water passage 24 and the third water passage 28 are branched on the upstream side, and then formed on the wall surface in the middle of the third water passage 28 on the downstream side. Since the second water passage 26 is formed by the opening 26 a, the communication portion 26 b, the rising slope portion 26 e, and the water passage 26 c, the first water passage 24 that supplies cleaning water to the first water outlet 20 Since the second water passage 26 is formed independently of each other, in other words, unlike the above-described embodiment, the common water passage 25 is not provided, so that the first water passage 24 and the second water passage 24 are not provided. The amount of washing water supplied to the water channel 26 can be accurately distributed.
In addition, although the rising slope part 26e is formed in the 2nd water flow path 26, it does not become a big energy loss, but can maintain the flow velocity of a desired washing water from the 2nd spout 22.

  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.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Skirt part 4 Bowl part 6 Conveyance channel 8 Drainage channel 8a Inlet 10 Reservoir tank 11 Drainage valve 12 Soil receiving surface 14 Rim part 16 Shelf part 18 Zet hole 20 1st outlet 22 2nd outlet 24 First water passage 25 Common water passage 26 Second water passage 26a Opening 28 Third water passage

Claims (5)

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 is formed inside the rim portion outside the first water discharge portion,
The second water discharger is arranged in a region near the position of the shelf that changes from a small radius of curvature of the bowl to a large radius of curvature on the front side of the other side centered on the longitudinal direction of the bowl. A flush toilet, characterized by   The flush toilet according to claim 1, wherein the first water discharger has an opening that is flat in the horizontal direction.   The flush toilet according to claim 1 or 2, wherein the second water passage is formed at the same level as the first water discharge portion.   The flush toilet according to any one of claims 1 to 3, 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.   Furthermore, it has a zette hole provided at a location facing the drainage channel, and a third water channel for supplying wash water from the water supply source to the zet hole, and the second water channel is the above-mentioned The flush toilet of Claim 1 currently formed in the downstream from the opening formed in a part of 3rd water flow path.

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