JP2015183420A - Water closet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water closet that can suppress washing water from splashing out of a toilet from a rim part of a bowl part and further improve washing performance.SOLUTION: A water closet 1 is configured to wash a toilet body 2 by supplying washing water thereto, and includes a bowl part 8 having a muck receiving surface 16 in a bowl shape and an a rim part 18 having an inner peripheral surface 22 positioned at an upper edge and exposed to the inner space of the bowl part 8, and rim water discharge parts 24 and 26 which discharge the washing water along the inner peripheral surface 22 of the rim part 18 to form a swirling flow. Swirling flow speed reduction means 80 of reducing the speed of the flow of the washing water discharged from the rim water discharge parts 24 and 26 to an upper region of the inner peripheral surface 22 to swirl is provided on the inner peripheral surface 22 of the rim part 18.

Description

  The present invention relates to a flush toilet, and more particularly, to a flush toilet in which a toilet body is washed with wash water supplied from a wash water supply source to discharge filth.

Conventionally, as a flush toilet that flushes toilets and discharges filth, as described in Patent Document 1, in order to improve cleanability, the inner periphery of the rim portion of the bowl portion of the flush toilet is It is formed in an overhang shape that protrudes toward the inside of the bowl part, and the wash water is discharged horizontally from the rim spout and the flow swirling on the inner peripheral surface of the rim part is caused to flow down to the bowl surface. What is washed is known. In such a toilet, a swirling flow is formed in which the wash water flows along the inner peripheral surface of the elliptical rim portion in plan view.
On the other hand, as described in Patent Document 2, in order to continuously supply a large flow rate and relatively strong washing water to the bowl portion for a long time, the washing water is continuously supplied from the rim spout. A flush toilet equipped with a jet pump mechanism that discharges water at a flow rate (water is discharged at a flow rate of about 80 L / min for about 4 seconds) is known.

Japanese Patent No. 3817734 JP 2004-156382 A

Here, in order to respond to recent water saving needs, Patent Document 2 discloses a toilet having an overhang-shaped rim portion that protrudes upward toward the inner space of the bowl as described in Patent Document 1. A supply mechanism that continuously supplies a large amount of wash water to the toilet bowl, such as the jet pump mechanism described in, has been studied to achieve both water saving and washing performance.
However, when these are combined, since a large flow of cleaning water flows along the inner peripheral surface of the elliptical rim part for a long time, in the latter half of the cleaning, the cleaning water swirling the inner peripheral surface gradually rises, Eventually, the problem of jumping out of the toilet bowl from the overhang-shaped rim has arisen. In particular, in flush toilets with 100% rim water discharge, the amount of flush water discharged from the rim water spout increases, so water jumps out of the toilet from the rim portion and is essential to solve. It has become an issue.

  The present invention has been made in order to solve the above-described problems of the prior art, and it is possible to suppress the washing water from jumping out of the toilet bowl from the rim portion of the bowl portion, and to further improve the washing performance. The purpose is to provide flush toilets.

In order to achieve the above object, the present invention provides a flush toilet that supplies washing water to a toilet body for washing, and is provided with a bowl-shaped filth receiving surface and an inner space of the bowl portion located at the upper edge. A rim portion having an inner peripheral surface exposed to the rim portion, and a rim spout portion that forms a flow that spouts and swirls cleaning water along the inner peripheral surface of the rim portion. A swirling flow speed reducing means for decelerating the flow of the washing water swirled from the rim water spouting section and swirling is provided on the inner peripheral surface of the inner peripheral surface.
In the present invention configured as described above, the cleaning water is supplied to the toilet body, and when the cleaning water that rotates on the inner peripheral surface of the rim rises from the lower region to the upper region of the inner peripheral surface, The flow of the washing water swirling by the flow decelerating means can be decelerated, and the direction can be changed downward. Therefore, while maintaining the swirlability of the cleaning water on the inner peripheral surface of the rim portion, it is possible to suppress the swirling flow of the cleaning water from rising along the inner peripheral surface of the rim portion and jumping out of the toilet. As a result, according to the present invention, it is possible to suppress the washing water from jumping out of the toilet bowl from the rim portion of the bowl portion, and to further improve the washing performance.

In the present invention, preferably, the swirling flow speed reducing means is a first swirling flow speed reducing means formed in an upstream region in the vicinity of the front end of the rim portion.
In the present invention configured as described above, the first swirling flow speed reducing means is formed in the upstream region in the vicinity of the front end of the rim portion. When rising from the lower region to the upper region of the peripheral surface, the first swirling flow speed reducing means passes from the upstream region near the front end of the rim portion through the front end of the rim portion having a small radius of curvature, However, it is possible to decelerate the flow of the washing water that reaches the downstream region in the vicinity of the front end of the rim portion that tends to jump out of the toilet. In other words, it is possible to reduce the amount of wash water that rises from the lower area of the inner peripheral surface to the upper area of the wash water that reaches the downstream area near the front end of the rim part where the wash water tends to jump out of the toilet bowl. The washing water can be prevented from jumping out of the toilet bowl in the downstream region in the vicinity of the front end of the rim portion where the washing water tends to jump out.

In the present invention, preferably, the rim water spouting portion is disposed on a first rim water spouting portion disposed on one side in the left-right direction of the bowl portion, and on the other side centering on the left-right direction of the bowl portion, And a second rim water spouting part for forming a swirling flow in the same direction as the swirling flow by the first rim water discharging part by discharging the washing water on the inner peripheral surface of the part. The second swirl flow speed reducing means is formed in the upstream area near the second rim water discharge section in the rear area, and the second swirl flow speed reduction means is in the vicinity of the rear second rim water discharge section from the front end of the rim section. The flow of the wash water that passes through the upstream region and reaches the merging region in the vicinity of the second rim water spouting portion can be reduced.
In the present invention configured as described above, the second swirl flow speed reducing means is the second swirl flow reducing means when the cleaning water swirling on the inner peripheral surface of the rim portion rises from the lower region to the upper region of the inner peripheral surface. The flow of the wash water that passes through the upstream region in the vicinity of the rim water spouting section and reaches the merging area in the vicinity of the second rim water spouting section where the wash water easily jumps out of the toilet can be decelerated, and the direction is changed downward. be able to. That is, the amount of wash water that rises from the lower region of the inner peripheral surface to the upper region can be reduced in the wash water that has reached the confluence region in the vicinity of the second rim water spouting portion where the wash water is likely to jump out of the toilet bowl. Further, the wash water can be prevented from jumping out of the toilet bowl in the confluence region in the vicinity of the second rim water spouting portion where the wash water is likely to jump out.

In the present invention, preferably, the swirling flow speed reducing means is formed in a convex shape protruding from the inner peripheral surface of the rim portion to the inside of the bowl portion or a concave shape recessed to the outside of the bowl portion in plan view.
In the present invention configured as described above, the swirling flow speed reducing means is formed in a convex shape protruding from the inner peripheral surface of the rim portion to the inside of the bowl portion or a concave shape recessed to the outside of the bowl portion in plan view. Therefore, when the cleaning water swirling on the inner peripheral surface of the rim rises from the lower region to the upper region in the latter half of the cleaning without significantly impairing the swirling performance of the cleaning water on the inner peripheral surface of the rim. The flow of swirling washing water can be decelerated and the direction can be changed downward.

The present invention preferably includes a supply device for supplying a constant large flow of flush water to the toilet body continuously for a predetermined time, a supply device for storing the wash water, and at least a part of which is in the reservoir tank. It is equipped with a jet pump unit arranged in a submerged state.
In the present invention configured as above, even if the supply device is a jet pump unit that supplies a constant large flow of flush water to the toilet body continuously for a predetermined time, the upper region on the inner peripheral surface of the rim portion Since the swirl flow decelerating means is provided, the supply device continuously supplies a large amount of wash water to the toilet body for a predetermined time, and the wash water swirling on the inner peripheral surface of the rim portion When rising from the lower region to the upper region, the flow of swirling washing water can be decelerated and the direction can be changed downward.

  According to the flush toilet of the present invention, the wash water can be prevented from jumping out of the toilet rim portion of the bowl portion, and the washing performance can be improved.

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 a top view which shows the water supply apparatus of the flush toilet bowl by embodiment of this invention. FIG. 4 is a front view of FIG. 3. It is a schematic front view which shows the water supply apparatus of FIG. It is a diagram which shows the relationship between the instantaneous flow volume of the wash water supplied with the water supply apparatus of FIG. 3, and time. It is the fragmentary sectional view seen along the VII-VII line of FIG. It is the fragmentary sectional view seen along the VIII-VIII line of FIG. It is the fragmentary sectional view seen along the IX-IX line of FIG.

  Next, 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. 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.

A flush toilet 1 according to an embodiment of the present invention is a floor drainage type flush flush toilet in which a drain pipe (described later) is connected to a drain pipe (not shown) installed on the floor.
As shown in FIGS. 1 and 2, the flush toilet 1 includes a toilet body 2 and a water supply device 4 (supply device) that supplies cleaning water to the toilet body 2. The toilet body 2 is made of earthenware with a glaze layer formed on the surface, a skirt portion 7 is formed in the lower portion, a bowl portion 8 is formed in the front portion of the upper half, and an upstream end is a water supply device in the upper rear portion. 4 is formed, and a drainage pipe 12 for discharging filth is formed in the lower rear part.

  The water supply device 4 described above includes a water storage tank 5 and a jet pump unit 6 described later. Note that. The present invention is a tank-type flush toilet having a gravity water supply water storage tank, a direct pressure flush toilet with a flush tank that does not have a water storage tank, and a flush valve that supplies flush water. It can also be applied to flush toilets.

  The bowl portion 8 includes a bowl-shaped filth receiving surface 16, a rim portion 18 located at the upper edge, and a recess 20 formed below the filth receiving surface 16. Here, the inner peripheral surface 22 of the rim portion 18 is exposed to the inner space of the bowl portion 8 and extends upward toward the inner space, specifically, as shown in FIG. It is formed in an overhanging shape. The inner peripheral surface 22 includes a shelf-like portion 22a extending in the lateral direction on the lower side and a wall-like side wall portion 22b extending upward.

  A first rim spout 24 for discharging washing water is formed slightly rearward of the central portion on the left side when viewed from the front of the inner peripheral surface 22 of the rim portion 18 of the bowl portion 8. A second rim spout 26 is formed. Each of the first rim water outlet 24 and the second rim water outlet 26 discharges cleaning water in the same direction (counterclockwise direction in FIG. 1) to form a swirling flow.

  Moreover, the common water flow path 10 formed in the rear upper part of the flush toilet 1 mentioned above is branched into the 1st water flow path 28 and the 2nd water flow path 30 toward the toilet front. The first water passage 28 is for supplying cleaning water to the first rim water outlet 24, and the second water passage 30 is for supplying cleaning water to the second rim water outlet 26.

  In the flush toilet 1 described above, the first rim spout 24, the first water passage 28, the second rim spout 26, and the second water passage 30 are formed integrally with the ceramic toilet body 2. The flush toilet according to the present embodiment is not limited to this form, and the first rim water outlet, the first water passage, the second rim water outlet, and the second water passage are separated from the toilet body by a distributor or the like. You may make it form.

Further, the drainage pipe 12 is connected to the bottom surface of the recess 20 and has substantially the same diameter (substantially the same cross-sectional shape) and extends backward and downward, and drainage connected to the introduction pipe 32 and extending upward. A trap conduit 34. This introduction pipe line 32 is a portion excluding the inlet 32a and has substantially the same diameter (substantially the same cross-sectional shape), and the inside of the pipe line has the same cross-sectional area. The drain trap pipe 34 is formed by an ascending path 34a and a descending path 34b.
The introduction pipe line 32 is connected to the bottom surface of the recess 20 as a smooth continuous curved surface, and the washing water flowing into the introduction pipe line 32 from the recess 20 smoothly flows in the introduction pipe line 32.

  Next, the water supply device 4 of the flush toilet 1 according to the embodiment of the present invention will be described with reference to FIGS. 3 is a plan view showing a water supply device of a flush toilet according to an embodiment of the present invention, FIG. 4 is a front view of FIG. 3, and FIG. 5 is a schematic front view showing the water supply device of FIG. 6 is a diagram showing the relationship between the instantaneous flow rate of cleaning water supplied by the water supply device of FIG. 3 and time. In FIG. 5, for convenience, the arrangement of the jet nozzle and the throat pipe is depicted in a different arrangement from that shown in FIGS.

  The water supply device 4 of the flush toilet 1 includes a water storage tank 5, a water supply pipe 36 for supplying cleaning water to the water storage tank 5, a water supply valve device 38 provided in the water supply pipe 36, and this water supply pipe 36 is provided with a jet pump unit 6 provided at the downstream end of 36 for supplying wash water to the toilet body 2 and a manual lever 40 for the user to supply wash water by manual operation.

  At the upstream end of the water supply pipe 36, a water stop cock 41 is provided for stopping the wash water supplied from an external water supply source. The stop cock 41 is kept open during normal use.

  The jet pump unit 6 includes an inverted V-shaped throat pipe 42 and a jet nozzle 44. Specifically, the downstream end of the throat pipe 42 is connected to a drain port 45 (see FIG. 2) communicating with the common water passage 10 of the toilet body 2, and a suction port 42a is formed at the upstream end thereof. 42a is located in the lower part in the water storage tank 5. FIG. Further, the jet nozzle 44 is disposed so as to face the suction port 42 a of the throat pipe 42, and the suction port 42 a and the jet nozzle 44 of the throat pipe 42 are always submerged in the water storage tank 5.

  The jet pump 6 injects high-speed washing water from the jet nozzle 44 toward the suction port 42a of the throat pipe 42. At this time, the space near the suction port 42a in the throat pipe 42 near the jet nozzle 44 becomes negative pressure. By inducing the jet pump action (ejector effect) by this negative pressure, the washing water in the vicinity of the water storage tank 5 is sucked, and the washing water and the washing water ejected from the jet nozzle 44 are combined. It flows through the throat pipe 42 and is supplied to the common water passage 10 of the toilet body 2 via the drainage port 45.

  In addition to the water supply valve device 38 described above, the water supply line 36 is provided with a constant flow valve 46 on the upstream side of the water supply valve device 38 and a vacuum breaker valve 48 on the downstream side. This constant flow valve 46 is for making the washing water supplied to the water supply valve device 38 have a constant flow rate. The vacuum breaker valve 48 sucks air from the outside and from the vacuum breaker valve 48 to the jet nozzle 44. This is to prevent negative pressure in the pipe.

  The water supply valve device 38 is a pilot-type diaphragm valve, and switches between a main valve seat 50, a water stop state where the water is stopped by sitting on the main valve seat 50, and a water supply state where water is supplied away from the main valve seat 50. The main valve body 52 which is a diaphragm valve, and the pressure chamber 54 which moves the main valve body 52 with respect to the main valve seat 50 with the pressure inside are provided. The pressure chamber 54 includes a first hole 56 and a second hole 58 that release the pressure of the pressure chamber 54, and a first pilot that opens and closes the first hole 56 in conjunction with the manual operation of the user in the manual lever 40 described above. There are provided a valve 60, a float 62 that moves up and down with the level of the washing water in the water storage tank 5, and a second pilot valve 64 that opens and closes the second hole 58 by the vertical movement of the float 62.

  Further, the main valve body 52 is provided with a bleed hole (not shown), and when the water is stopped, the primary side flow path A of the water supply pipe line 36 communicates with the inside of the pressure chamber 54 by the bleed hole. It is supposed to be. Here, the opening area of the first hole 56 is larger than the opening area of the second hole 58. Further, the first hole 56 is formed at an upper position than the second hole 58 as shown in FIG.

  The first pilot valve 60 is connected to the manual lever 40 by a drive shaft 65 and opens and closes the first hole 56 by a manual operation of the manual lever 40 by the user. Here, in FIG. 4, the manual lever 40 is largely washed when rotated to the near side (one direction) and small washed when rotated to the far side (the other direction). It has been made.

  The water supply valve device 38 is normally in a water stop state. In the water stop state, both the first hole 56 and the second hole 58 are closed, and the primary flow path A of the water supply pipe line 36 is Since the pressure chamber 54 and the bleed hole communicate with each other, the water pressure in the primary side flow path A and the pressure chamber 54 is the same water pressure (= primary side flow path pressure), and the secondary side flow path B is open to the atmosphere. Since the area where water pressure acts on the body 52 is larger than the area of the primary side flow path A, the main valve body 52 is pressed against the main valve seat 50 and closed.

  In the water supply valve device 38, when the first hole 56 and / or the second hole 58 are opened by the first pilot valve 60 and / or the second pilot valve 64, the washing water flows out from the pressure chamber 54, and the pressure chamber 54 The internal pressure decreases, the main valve body 52 moves away from the main valve seat 50, opens, and enters a water discharge state.

  In the water supply valve device 38, when the first hole 56 and the second hole 58 are closed by the first pilot valve 60 and the second pilot valve 64, the pressure in the pressure chamber 54 becomes the primary side passage pressure again, and the main valve body 52. Moves toward the main valve seat 50 and finally enters a closed state (water stoppage state). At this time, since the cleaning water of the primary side flow path A is gradually injected into the pressure chamber 54 from the bleed hole, the main hole 56 and the second hole 58 are blocked, and the main water is delayed by a predetermined time. The valve body 52 becomes a valve closing state (water stop state).

  Next, as shown in FIG. 5, in the vicinity of the lower end of the throat pipe 42, a switching valve 66 for switching between jet water discharge and tank water storage and a float 68 attached to the switching valve 66 are provided. Since the float 68 moves up and down depending on the water level in the water storage tank 5, the float 68 also descends when the water level becomes low, so that the switching valve 66 blocks the flow path in the throat pipe 42. ing. In a state where the flow path in the throat pipe 42 is blocked, the wash water sprayed from the jet nozzle 44 collides with the switching valve 66 and flows into the water storage tank 5 without flowing through the throat pipe 42, Water is stored in the tank 5. Further, when the predetermined water level is reached and the water storage is completed, the float 68 is also raised, so that the switching valve 66 opens the flow path in the throat pipe 42. In a state where the flow path in the throat pipe 42 is opened, the washing water sprayed from the jet nozzle 44 flows through the throat pipe 42 and is supplied to the toilet body 2.

  Furthermore, a large / small washing switching mechanism 70 is provided in the water storage tank 5 for switching the amount of washing water required for large washing and small washing. The large / small washing switching mechanism 70 divides the interior of the water storage tank 5 into a space surrounding the jet nozzle 44 and the suction port 42a of the throat pipe 42 and another space, and a partition wall 72 opened above the partition wall 72. And an opening / closing valve 76 attached to the partition wall 72 to open and close the opening 74.

  The on / off valve 76 of the large / small cleaning switching mechanism 70 is connected to the drive shaft 65 by a chain 78. When the manual lever 40 is rotated in the other direction by the user for small cleaning, the on / off valve is operated by the chain 78. 76 is pulled up, and the opening / closing valve 76 closes the opening 74.

  Next, a makeup water supply pipe 81 is provided in the water storage tank 5 to supply makeup water to the toilet body 2 after washing the toilet body 2. A lower end 81a of the makeup water supply pipe 81 communicates with a downstream end of the throat pipe 42, and a makeup water supply port 83 is formed at the upper end 81b.

  As shown in FIG. 5, the water level WL in the water storage tank 5 is as follows. The water level WL1 is the lower end position of the opening 74 of the partition wall 72 and indicates the water level when the large cleaning is completed, the water level WL2 is the upper end position of the partition wall 72 and indicates the water level when the small cleaning is completed, and the water level WL3 is The normal water level before or after use of the flush toilet 1 is indicated, and the water level WL4 is supplied immediately after the washing water is supplied into the water storage tank 5 by the water supply valve device 38 after the large washing or the small washing (and the washing is stopped). It is a water level indicating a water stop state before water supply).

  As shown in FIG. 6, the water supply device 4 provided with the jet pump unit 6 can supply a large amount of flush water to the toilet body 2 continuously for a predetermined time. Specifically, for example, the water supply device 4 is configured to supply flush water of 85 L / min to the toilet body 2 continuously for 4 seconds. The instantaneous flow rate by the water supply device 4 is preferably a large flow rate in the range of about 65 L / min to about 85 L / min, and is preferably continuously supplied for about 3 seconds to about 7 seconds.

Next, the structure of the bowl portion 8 of the toilet body 2 of the flush toilet 1 according to this embodiment will be described in detail with reference to FIGS. 1, 2, 7 and 8.
7 is a partial cross-sectional view taken along the line VII-VII in FIG. 1, FIG. 8 is a partial cross-sectional view taken along the line VIII-VIII in FIG. 1, and FIG. It is the fragmentary sectional view seen along the IX line.
As shown in FIG. 1, the bowl portion 8 of the toilet body 2 has a rim slightly behind the central portion on the left side as seen from the front of the inner peripheral surface 22 of the rim portion 18 of the bowl portion 8 as described above. A first rim spout 24 is formed along the inner peripheral surface 22 of the portion 18 to form a flow that spouts and swirls the cleaning water, and the inner peripheral surface 22 of the rim portion 18 is cleaned on the right rear side as viewed from the front. A second rim spout 26 is formed that discharges water to form a swirl flow in the same direction as the swirl flow by the first rim spout 24. Here, as shown in FIGS. 1, 2, 7, and 8, the region from the first rim spout 24 to the second rim spout 26 of the rim portion 18 is cleaned along the inner peripheral surface 22 thereof. It is a waterway through which water flows.

On the side wall portion 22b of the inner peripheral surface 22 of the rim portion 18, a swirling flow speed reducing means 80 is provided in the upper region 22c for decelerating the flow of the swirling water swirled from the first rim water spouting port 24.
The swirling flow speed reducing means 80 includes a first swirling flow speed reducing means 82 formed in the upstream area A1 in the vicinity of the front end 18a of the rim portion 18 and an upstream side in the vicinity of the second rim spout in the rear area of the rim portion 18. And second swirl flow reduction means 84 formed in the region A3. At the front end 18a of the rim portion 18, the radius of curvature of the inner peripheral surface 22 of the rim portion 18 is formed to be a minimum.

The first swirling flow speed reducing means 82 is positioned in front of the left side (upstream side) when viewed from the front of the toilet body 2, and has a concave shape that is recessed from the side wall portion 22 b of the inner peripheral surface 22 of the rim portion 18 to the outside of the bowl portion 8. Is formed. The first swirl flow reduction means 82 is formed in the upper region 22 c of the side wall portion 22 b of the inner peripheral surface 22 of the rim portion 18. The first swirling flow speed reducing means 82 has a curved surface having a cross-sectional arc shape having a radius of curvature R1 smaller than the basic radius of curvature R0 of the inner circumferential surface 22 before and after the same at the same height position. On the other hand, in the lower region 22d of the side wall portion 22b of the inner peripheral surface 22 below the first swirl flow speed reducing means 82, the side wall portion 22b of the inner peripheral surface 22 of the rim portion 18 is front and rear thereof at the same height position. A gentle curved surface having a radius of curvature R2 that is substantially the same as the basic radius of curvature R0 of the inner peripheral surface 22 is formed. As shown in FIG. 9, the upper region 22c in which the first swirling flow speed reducing means 82 is provided and the lower region 22d of the side wall portion 22b are arranged so as to be shifted in the radial direction. In other words, the first swirling flow speed reducing means 82 forms a concave surface that is locally recessed with respect to the inner peripheral surface 22 of the front and rear rim portions 18. Further, in the lower region 22d below the first swirl flow decelerating means 82, a smooth flow surface that is continuous with the inner peripheral surface 22 of the front and rear rim portions 18 is formed without greatly changing the shape locally. .
Therefore, the curvature radius R1 of the upper region 22c in the first swirl flow reduction means 82 is made smaller than the curvature radius R2 of the lower region 22d of the side wall portion 22b of the inner peripheral surface 22 below the first swirl flow reduction means 82. ing.

  In the present embodiment, the first swirling flow speed reducing means 82 is formed in a concave shape that is recessed from the side wall portion 22b of the inner peripheral surface 22 of the rim portion 18 to the outside of the bowl portion 8. 82 may be formed in a convex shape protruding from the side wall portion 22 b of the inner peripheral surface 22 of the rim portion 18 to the inside of the bowl portion 8. Further, the first swirl flow reduction means 82 is not limited to the arc shape facing inward or outward in a plan view, and the inner peripheral surface of the front and rear rim portions 18 including a straight portion, a corner portion, a spherical portion, and a bent portion. It may be formed in other shapes that bend from 22.

As shown in FIG. 9, the curvature (1 / R1) of the first swirl flow reduction means 82 in the upper region 22 c of the side wall portion 22 b of the inner peripheral surface 22 of the rim portion 18 is lower than the first swirl flow reduction means 82. It is formed larger than the curvature (1 / R2) in the lower region 22d. Further, the curvature (1 / R1) of the first swirling flow speed reducing means 82 is formed to be larger than the curvature (1 / R3) in the top region 22e of the inner peripheral surface 22 further above the first swirling flow speed reducing means 82. Yes. Further, as described above, the curvature (1 / R1) of the first swirling flow speed reducing means 82 is based on the basic curvature (1 / R0) of the side wall portion 22b of the inner peripheral surface 22 at the same height position. It has a curved surface that becomes larger.
Thus, the first swirling flow speed reducing means 82 forms a flow path curved outward from the lower region 22d of the side wall portion 22b of the inner peripheral surface 22, and destroys the swirling flow swirling along the rim portion 18. And / or can be suppressed. Therefore, the first swirling flow speed reducing means 82 can reduce the flow of the washing water that passes through the upstream region A1 near the front end 18a of the rim portion 18 and reaches the downstream region A2 near the front end 18a of the rim portion 18. it can. Further, the first swirling flow speed reducing means 82 can suppress the swirling flow swirling along the rim portion 18 from rising upward from the first swirling flow speed reducing means 82.

The second swirl flow reduction means 84 is located on the front side of the second rim water spouting port 26 in the right side (downstream side) rear side region when viewed from the front of the toilet body 2, and is on the inner peripheral surface 22 of the rim portion 18. It is formed in a concave shape that is recessed from the side wall portion 22 b to the outside of the bowl portion 8. The second swirl flow reduction means 84 is formed in the upper region 22 c of the side wall portion 22 b of the inner peripheral surface 22 of the rim portion 18. The second swirl flow decelerating means 84 has a curved surface having a cross-sectional arc shape having a radius of curvature R4 smaller than the basic radius of curvature R0 of the inner circumferential surface 22 before and after the same at the same height position. On the other hand, in the lower region 22d of the side wall portion 22b of the inner peripheral surface 22 below the second swirl flow decelerating means 84, the side wall portion 22b of the inner peripheral surface 22 of the rim portion 18 is front and rear thereof at the same height position. A gently curved surface having a radius of curvature R5 that is substantially the same as the basic radius of curvature R0 of the inner peripheral surface 22 is formed. The upper region 22c where the second swirl flow decelerating means 84 is provided and the lower region 22d of the side wall portion 22b are displaced in the radial direction.
In other words, the second swirling flow speed reducing means 84 forms a concave surface that is locally recessed with respect to the inner peripheral surface 22 of the front and rear rim portions 18. Further, in the lower region 22d of the side wall portion 22b of the inner peripheral surface 22 below the second swirl flow decelerating means 84, a smooth flow surface that is continuous with the inner peripheral surface 22 of the front and rear rim portions 18 is formed. .
Therefore, the curvature radius R4 of the upper region 22c in the second swirl flow reduction means 84 is made smaller than the curvature radius R5 of the lower region 22d of the side wall portion 22b of the inner peripheral surface 22 below the second swirl flow reduction means 84. ing.

  In the present embodiment, the second swirl flow reduction means 84 is formed in a concave shape that is recessed from the side wall portion 22 b of the inner peripheral surface 22 of the rim portion 18 to the outside of the bowl portion 8. 84 may be formed in a convex shape protruding from the side wall portion 22 b of the inner peripheral surface 22 of the rim portion 18 to the inside of the bowl portion 8. Further, the second swirl flow reduction means 84 is not limited to an arc shape in plan view, but is formed in another shape that bends from the inner peripheral surface 22 of the front and rear rim portions 18 including a straight portion, a corner portion, and a spherical portion. May be.

As shown in FIG. 8, the curvature (1 / R4) of the second swirl flow reduction means 84 in the upper region 22 c of the side wall portion 22 b of the inner peripheral surface 22 of the rim portion 18 is lower than that of the second swirl flow reduction means 84. It is formed larger than the curvature (1 / R5) in the lower region 22d. Further, the curvature (1 / R4) of the second swirling flow speed reducing means 84 is formed to be larger than the curvature (1 / R3) in the top region 22e of the inner peripheral surface 22 further above the second swirling flow speed reducing means 84. Yes. Further, as described above, the curvature (1 / R4) of the second swirling flow speed reducing means 84 is based on the basic curvature (1 / R0) of the side wall portion 22b of the inner peripheral surface 22 at the same height position. It has a curved surface that becomes larger.
As described above, the second swirling flow speed reducing means 84 forms a flow path curved outward from the lower region 22d of the side wall portion 22b of the inner peripheral surface 22, and destroys the swirling flow swirling along the rim portion 18. And / or can be suppressed. Accordingly, the second swirl flow speed reducing means 84 is washed from the front end 18a of the rim portion 18 through the upstream area A3 in the vicinity of the rear second rim water outlet 26 to the merge area A4 in the vicinity of the second rim water outlet 26. The water flow can be slowed down. Further, the second swirl flow deceleration means 84 can suppress the swirl flow swirling along the rim portion 18 from rising upward from the second swirl flow deceleration means 84.

Next, the effect by the flush toilet 1 by embodiment of this invention mentioned above is demonstrated.
First, when the user operates the manual lever 40 of the water supply device 4, the cleaning water supplied from the external water supply source by the water supply valve device 38 reaches the jet nozzle 44, and the cleaning water flows from the jet nozzle 44 to the throat pipe 42. Injected toward the suction port 42a. At this time, since the pressure in the vicinity of the suction port 42a of the throat pipe 42 is negative, the wash water stored in the water storage tank 5 is also sucked into the throat pipe 42 and the wash water and the water supplied from the outside by the water supply device 4 are stored. Wash water together with the tank 5 flows through the throat pipe 42 and is supplied to the toilet body 2, so that the bowl 8 is started to be washed. At this time, as shown in FIG. 6, a constant large flow of flushing water is supplied from the water supply device 4 to the toilet body 2 continuously for a predetermined time.

  In the toilet body 2, the first rim spout 24 discharges the cleaning water forward in a substantially horizontal direction, and the second rim spout 26 discharges the cleaning water rearward in a substantially horizontal direction, A swirl flow swirling in the same direction (counterclockwise) is formed. The wash water spouted forward from the first rim spout 24 flows along the water passage on the inner peripheral surface 22 of the rim portion 18, passes through the front end of the bowl portion 8, and passes through the second rim spout on the opposite side. It reaches to the water mouth 26. On the other hand, the wash water spouted from the second rim spout 26 flows along the water passage on the inner peripheral surface 22 of the rim portion 18 and turns into a swirl flow swirling in the same direction.

Here, the wash water discharged mainly from the first rim spout 24 is upstream from the front side of the first rim spout 24 along the inner peripheral surface 22 of the rim 18 near the front end 18a of the rim 18. It passes through the side region A1 and flows to the downstream region A2 in the vicinity of the front end 18a of the rim portion 18. When the supply flow rate of the cleaning water is relatively small, the discharged cleaning water flows in the arrow F1 along the lower region 22d of the side wall portion 22b of the inner peripheral surface 22 below the first swirl flow reduction means 82. As shown in the figure, it flows smoothly while maintaining the flow velocity, passes through the upstream region A1 in the vicinity of the front end 18a of the rim portion 18, and reaches the downstream region A2 in the vicinity of the front end 18a of the rim portion 18. Thus, the swirlability of the cleaning water on the inner peripheral surface 22 of the rim portion 18 is maintained, and the cleaning performance can be ensured.
The water supply device 4 continuously supplies a large amount of washing water to the toilet body 2 for a predetermined time, and the washing water turning around the side wall portion 22b of the inner peripheral surface 22 of the rim portion 18 is lower in the second half of washing or the like. When rising from the region 22d to the upper region 22c, the flow rate of the cleaning water is reduced by flowing along the concave shape of the first swirling flow reduction means 82, as indicated by the arrow F2, and the front end of the rim portion 18 The flow of the wash water that passes through the upstream area A1 in the vicinity of 18a and reaches the downstream area A2 in the vicinity of the front end 18a of the rim portion 18 where the wash water easily jumps out of the toilet bowl can be decelerated and is lowered downward by gravity. Try to flow down. Therefore, it is possible to suppress the swirling flow of the washing water from rising and jumping out of the toilet bowl in the downstream region A2 in the vicinity of the front end 18a of the rim portion 18.

In addition, the wash water discharged mainly from the first rim spouting port 24 flows from the front end 18a of the rim portion 18 along the inner peripheral surface 22 of the rim portion 18 to the second rim spouting port 26 behind the rim portion 18. It passes through the upstream region A3 in the vicinity and flows toward the merging region A4 in the vicinity of the second rim spout 26. When the supply flow rate of the cleaning water is relatively small, the flow of the cleaning water is indicated by an arrow F3 along the lower region 22d of the side wall 22b of the inner peripheral surface 22 below the second swirl flow speed reducing means 84. As shown, the water smoothly flows while maintaining the flow velocity, passes through the upstream region A3 in the vicinity of the second rim spout 26, and is discharged from the second rim spout 26 in the vicinity of the second rim spout 26. It is possible to reach the merging area A4. In this way, the flow velocity of the swirling flow along the lower region 22d below the second swirling flow decelerating means 84 is maintained and merged with the flow of cleaning water discharged from the second rim spout 26, and the rim portion The swirlability of the cleaning water in the inner peripheral surface 18 of 18 is maintained, and the cleaning performance can be ensured.
The water supply device 4 continuously supplies a large amount of washing water to the toilet body 2 for a predetermined time, and the washing water turning around the side wall portion 22b of the inner peripheral surface 22 of the rim portion 18 is lower in the second half of washing or the like. When rising from the region 22d to the upper region 22c, as shown by the arrow F4, the cleaning water is a second swirl flow reduction means formed in the upper region 22c of the side wall portion 22b of the inner peripheral surface 22 of the rim portion 18. It will flow along 84 concave shapes. As shown by the arrow F4, the washing water flows along the concave shape of the second swirl flow reduction means 84, the flow velocity is reduced, and the washing water passes through the upstream region A3 in the vicinity of the second rim water spouting port 26 to be washed. The flow of washing water that reaches the merging area A4 in the vicinity of the second rim spout 26 where the water tends to jump out of the toilet can be decelerated and tends to flow downward due to gravity. Accordingly, in the merging region A4 in the vicinity of the second rim spout 26, the flow of the cleaning water from the upper region 22c of the side wall portion 22b of the inner peripheral surface 22 of the rim portion 18 in the upstream region A3 in the vicinity of the second rim spout 26. However, it joins so that it may ride on the flow of the wash water discharged from the 2nd rim spout 26, and it can suppress that the swirl flow of the wash water rises and jumps out of the toilet bowl.

  In the flush toilet 1 according to the embodiment of the present invention described above, the first swirling flow speed reducing means 82 and the second swirling flow speed reducing means 84 are provided in the upper region 22c of the inner peripheral surface 22 of the rim portion 18. The water supply device 4 supplies cleaning water to the toilet body 2 and turns when the cleaning water turning on the inner peripheral surface 22 of the rim portion 18 rises from the lower region 22d to the upper region 22c in the second half of the cleaning, etc. The flow of washing water to be decelerated can be decelerated and the direction can be changed downward. Therefore, while maintaining the swirlability of the cleaning water on the inner peripheral surface 22 of the rim portion 18, it is possible to suppress the swirling flow of the cleaning water from rising along the inner peripheral surface 22 of the rim portion 18 and jumping out of the toilet. Can do. As a result, according to the present invention, the washing water can be prevented from jumping out of the toilet bowl from the rim portion 18 of the bowl portion 8, and the washing performance can be improved.

  Further, in the flush toilet 1 according to the present embodiment, the first swirl flow reduction means 82 is discharged from the first rim spout 24, passes through the upstream region A1 in the vicinity of the front end 18a of the rim portion 18, The flow of washing water from the front end 18a of the rim portion 18 to the downstream region A2 in the vicinity of the front end 18a of the rim portion 18 where the washing water can easily jump out of the toilet can be reduced. Therefore, when the water supply device 4 supplies the cleaning water to the toilet body 2 and the cleaning water turning around the inner peripheral surface 22 of the rim portion 18 rises from the lower region 22d to the upper region 22c in the second half of the cleaning, The first swirl flow decelerating means 82 can decelerate the flow of washing water in the downstream region A2 in the vicinity of the front end 18a of the rim portion 18 and can change the direction downward. That is, the wash water that rises from the lower region 22d of the inner peripheral surface 22 to the upper region 22c in the wash water that reaches the downstream region A2 in the vicinity of the front end 18a of the rim portion 18 where the wash water is likely to jump out of the toilet bowl. The amount can be reduced, and the wash water can be prevented from jumping out of the toilet bowl in the downstream area A2 near the front end 18a of the rim portion 18 where the wash water easily jumps out.

  Further, in the flush toilet 1 according to the present embodiment, the second swirl flow reduction means 84 passes through the upstream region A3 in the vicinity of the second rim spout 26 behind the rim portion 18 from the front end 18a of the rim portion 18. Thus, the flow of the cleaning water that reaches the merging region A4 in the vicinity of the second rim water spouting port 26 where the cleaning water can easily jump out of the toilet can be decelerated. Therefore, when the water supply device 4 supplies the cleaning water to the toilet body 2 and the cleaning water turning around the inner peripheral surface 22 of the rim portion 18 rises from the lower region 22d to the upper region 22c in the second half of the cleaning, The second swirl flow decelerating means 84 can decelerate the flow of the wash water reaching the merging region A4 in the vicinity of the second rim water spouting port 26 and can change the direction downward. That is, the amount of wash water that rises from the lower region 22d of the inner peripheral surface 22 to the upper region 22c in the wash water that has reached the merge region A4 in the vicinity of the second rim spout 26 where the wash water is likely to jump out of the toilet bowl. In the merging area A4 in the vicinity of the second rim spout 26 where the washing water is likely to jump out, the washing water can be prevented from jumping out of the toilet bowl.

  Further, in the flush toilet 1 according to the present embodiment, the swirling flow speed reducing means 80 is a convex shape protruding from the inner peripheral surface 22 of the rim portion 18 to the inside of the bowl portion 8 or recessed outside the bowl portion in plan view. Since it is formed in a concave shape, the cleaning water swirling on the inner peripheral surface 22 of the rim portion 18 does not significantly deteriorate the swirlability of the cleaning water on the inner peripheral surface 22 of the rim portion 18 in the second half of the cleaning or the like. When rising from the side region 22d to the upper region 22c, the flow of swirling washing water can be decelerated and the direction can be changed downward.

  Further, in the flush toilet 1 according to the present embodiment, even if the water supply device 4 is a jet pump unit that continuously supplies a large amount of flush water to the toilet body 2 for a predetermined time, Since the swirling flow speed reducing means 80 is provided in the upper region 22c of the peripheral surface 22, the water supply device 4 continuously supplies a large amount of flush water to the toilet body 2 for a predetermined time, and the inner periphery of the rim portion 18 When the cleaning water swirling on the surface 22 rises from the lower region 22d to the upper region 22c in the second half of the cleaning or the like, the flow of swirling cleaning water can be decelerated and the direction can be changed downward.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 4 Water supply device 6 Jet pump unit 8 Bowl part 18 Rim part 18a Front end 22 Inner peripheral surface 22b Side wall part 22c Upper side area 22d Lower side area 24 First rim water outlet 26 Second rim water outlet 42 Throat Pipe 44 Jet nozzle 45 Drain port 80 Swirling flow speed reducing means 82 First swirling flow speed reducing means 84 Second swirling flow speed reducing means A1 Upstream area A2 Downstream area A3 Upstream area A4 Merge area

Claims (5)

A flush toilet that supplies washing water to the toilet body for washing,
A bowl portion comprising a bowl-shaped filth receiving surface, and a rim portion having an inner peripheral surface located at the upper edge and exposed to the inside;
A rim water spouting part that forms a flow that spouts and swirls cleaning water along the inner peripheral surface of the rim part, and
A flush toilet characterized in that swirl flow speed reducing means for decelerating the flow of swirling water swirled from the rim water spouting section and swirling is provided in an upper region of the inner peripheral surface of the rim section.   The flush toilet according to claim 1, wherein the swirling flow reduction means is a first swirling flow reduction means formed in an upstream region in the vicinity of the front end of the rim portion. The rim water spouting portion is disposed on one side in the left-right direction of the bowl portion, and the first rim water spouting portion;
2nd which arrange | positions at the other side centering on the left-right direction of the said bowl part, and forms the swirling flow of the same direction as the swirling flow by the said 1st rim water discharging part by discharging washing water to the internal peripheral surface of the said rim | limb part. A rim water spouting unit,
The swirl flow decelerating means further includes second swirl flow decelerating means formed in an upstream region in the vicinity of the second rim water discharger in the rear region of the rim portion, and the second swirl flow decelerating unit. The flow of the washing water from the front end of the rim portion through the upstream region in the vicinity of the rear second rim water discharge portion to the confluence region in the vicinity of the second rim water discharge portion can be reduced. The flush toilet described.   The swirl flow reduction means is formed in a convex shape that protrudes from the inner peripheral surface of the rim portion to the inside of the bowl portion or a concave shape that is recessed to the outside of the bowl portion in plan view. The flush toilet according to any one of the above. A supply device for supplying a constant large flow of flush water to the toilet body continuously for a predetermined time;
The said supply apparatus is provided with the water storage tank which stores wash water, and the jet pump unit arrange | positioned in the state which at least one part was submerged in the said water storage tank. Flush toilet.

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