JP2015183421A - Water closet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water closet that can prevent washing water from overflowing from a rim part of a bowl part even when supplied at a large flow rate from a jet pump mechanism.SOLUTION: A water closet has a bowl part 8 including a muck receiving surface 16 and a rim part 18 with an inner peripheral surface 22 overhanging inward; rim water discharge parts 24 and 26 which discharge washing water along the inner peripheral surface 22 of the rim part 18 to form a swirling flow; a water storage tank 5; a jet pump unit which supplies the washing water to a toilet body at a large flow rate continuously for a predetermined time through a jet pump operation; water feed paths 28 and 30 which extend from the jet pump unit to the rim water discharge parts 24 and 26; and flow rate control means 86 which is provided on the water feed paths 28 and 30 and makes constant the flow rate of the washing water discharged from the rim water discharge parts 24 and 26 and swirling on the inner peripheral surface 22 when hydraulic pressure in the water feed paths 28 and 30 becomes equal to or above a predetermined value after washing starts.

Description

  The present invention relates to a flush toilet, and more particularly, to a flush toilet that supplies and flushes flush water to a toilet body using a jet pump action.

2. Description of the Related Art Conventionally, as a flush toilet that cleans a toilet and discharges filth, as described in Patent Document 1, a rim portion formed on the upper edge of the bowl portion of the flush toilet as described in Patent Document 1 Is formed in an overhang shape, and the wash water stored in the water storage tank is discharged in a horizontal direction from the rim spout to form a swirling flow.
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

  In such a toilet having an overhang-shaped rim portion as described in Patent Document 1, when the jet pump mechanism of Patent Document 2 is to be applied, the jet pump mechanism continues strong water. In order to supply the toilet to the toilet for a long time, the wash water discharged from the rim spouting port continuously turns the inner peripheral surface of the rim portion with a large flow rate.

However, in the flush toilet as described in Patent Document 2 described above, the jet pump mechanism supplies wash water into the throat from a jet nozzle directly connected to the water pipe, and jets of wash water from the jet nozzle At the same time, since the wash water volume amplified by entraining the water in the surrounding water storage tanks is supplied to the toilet bowl, if the amount of wash water sprayed from the jet nozzle varies due to fluctuations in tap water pressure, the variation As a result of the amplification, the amount of supply to the toilet bowl varies significantly.
In this way, when the tap water pressure varies and the supply flow rate of the wash water to the toilet by the jet pump mechanism greatly increases from the specified flow rate, the flow rate of the swirling wash water increases and overhangs in the second half of the wash, etc. There arises a problem that the washing water overflows from the front side where the radius of curvature of the shaped rim portion is small. 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 to solve the above-described problems of the prior art, and even when a large amount of cleaning water is supplied from the jet pump mechanism, the flow rate of the cleaning water turning around the rim portion is constant. An object of the present invention is to provide a flush toilet that can prevent the occurrence of water overflow from the rim portion of the bowl portion.

In order to achieve the above object, the present invention is a flush toilet that supplies washing water to a toilet body using a jet pump action to wash the bowl, and has a bowl-shaped waste receiving surface and an upper edge. A rim portion whose inner peripheral surface overhangs inward, a rim water discharge portion that forms a flow that spouts and swirls cleaning water along the inner peripheral surface of the rim portion, and cleaning A water storage tank that stores water, a jet pump unit that is disposed in a state where at least a part of the water is submerged in the water storage tank, and supplies a large flow of flush water to the toilet body for a predetermined time by the jet pump action; and a jet A water passage extending from the pump unit to the rim water spouting portion, and a cleaning provided in the water passage and after the start of cleaning, water is discharged from the rim water spouting portion and swivels around the inner peripheral surface when the water pressure in the water passage becomes a predetermined value or more. It is characterized in that the flow rate has a flow rate control means for constant.
In the present invention configured as described above, after the start of cleaning, when the water pressure of the large flow of cleaning water supplied by the jet pump action from the jet pump unit varies, and the water pressure in the water passage becomes a predetermined value or more, By the flow rate adjusting means, the flow rate of the washing water discharged from the rim water discharge portion and turning around the inner peripheral surface of the rim portion can be made constant. Therefore, when washing water is supplied to the toilet body using the jet pump action and washed, stable bowl washing can be performed, preventing the wash water from overflowing from the rim part of the bowl part to the outside of the toilet body. can do. As a result, according to the present invention, it is possible to maintain the cleanability due to the overhang shape of the rim portion and to achieve both water saving and cleanability of the bowl portion by the jet pump unit.

In the present invention, preferably, the flow rate adjusting means includes a branch port provided in the water passage and a resistance portion provided on the downstream side of the branch port in the water passage.
In the present invention configured as described above, the water pressure of the large flow rate of the wash water supplied from the jet pump unit by the jet pump action varies after the start of washing, and the wash water discharged from the rim water spouting unit becomes a large flow rate. In this case, the resistance portion provided downstream of the branch port in the water passage becomes the resistance of the flow of the washing water, the water passage becomes full, and the water pressure in the water passage becomes a predetermined value or more. At this time, a part of the wash water can be drained to the bowl part from the branch port provided in the water passage by the flow rate adjusting means, and the wash water is discharged from the rim water spouting part and swirls around the inner peripheral surface of the rim part. The flow rate can be made constant.

In the present invention, preferably, the branch port of the flow rate adjusting means forms an opening between the water passage and the bowl portion on the back side of the water passage.
In the present invention configured as described above, the branch port of the flow rate adjusting means forms an opening between the water passage and the bowl portion on the back side of the water passage. Without being further provided, a part of the washing water can be drained to the bowl part from the branch port provided in the water passage, and the water discharged from the rim water spouting part is swung around the inner peripheral surface of the rim part. The flow rate of the washing water to be made can be made constant.

  According to the flush toilet of the present invention, even when a large amount of wash water is supplied from the jet pump mechanism, the flow rate of the wash water turning around the rim portion can be made constant, and the rim portion of the bowl portion The occurrence of water overflow can be prevented.

It is a top view which shows the flush toilet bowl by 1st 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 a top view which shows the flush toilet bowl by 2nd Embodiment of this invention. It is a conceptual diagram which shows a mode that a wash water flows through the throttle part of a 1st water path in the flush toilet by 2nd Embodiment of this invention. It is the fragmentary sectional view seen along the XI-XI line of FIG. It is the fragmentary sectional view seen along the XII-XII 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 made of ceramic or resin, and a water supply device 4 (supply device) that supplies cleaning water to the toilet body 2. The toilet body 2 has a skirt portion 7 formed in the lower portion, a bowl portion 8 formed in the front of the upper half, and a common water passage 10 whose upstream end communicates with the water supply device 4 in the upper rear portion. A drain 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 can also be applied to a direct pressure flush toilet that does not have a water storage tank and is supplied with wash water directly from the water supply, or a flush toilet that is supplied with wash water by a flush valve.

  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.

  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. Here, in the present invention, the first rim spout 24 is a part of the first water passage 28 and constitutes the outlet portion of the first water passage 28. Similarly, the second rim spout 26 is the second water passage 26. It is a part of the water channel 30 and constitutes an outlet part of the second water channel 30.

  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 52 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 82 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 82a of the makeup water supply pipe 82 communicates with a downstream end of the throat pipe 42, and a makeup water supply port 84 is formed at the upper end 82b.

  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 first water passage 28 of the toilet body 2 of the flush toilet 1 according to the first embodiment of the present invention 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, and FIG. 8 is a partial cross-sectional view taken along the line VIII-VIII in FIG.
In the first water passage 28, when the flow rate of the washing water in the first water passage 28 increases after the start of cleaning, and the water pressure in the first water passage 28 becomes a predetermined value or more, the first rim water spouting port is provided. A flow rate adjusting means 86 for adjusting the flow rate of the cleaning water discharged from the water 24 and swirling on the inner peripheral surface to a constant value is provided. The flow rate adjusting means 86 can adjust the flow rate supplied to the bowl portion 8 of the toilet body 2 on the downstream side of the water supply device 4 to a flow rate that prevents water overflow.

The flow rate adjusting means 86 includes a branch port 88 provided upstream of the first rim water outlet 24 by a predetermined distance in the first water passage 28 and a resistance provided downstream of the branch port 88 in the first water passage 28. Part 90.
The branch port 88 of the flow rate adjusting means 86 forms an opening between the first water passage 28 and the bowl portion 8 on the back side of the first water passage 28. The branch port 88 opens laterally with respect to the stream line from the first water passage 28. When the flow rate of the washing water flowing into the first water passage 28 is large and the washing water is accumulated upstream of the resistance portion 90 and the vicinity of the resistance portion is locally full, the water pressure in the first water passage 28 is increased. The water rises to a predetermined value or more, and the washing water flows out from the branch port 88 to the bowl portion 8.

  The resistance portion 90 is formed so as to reduce the flow path cross-sectional area 28a at the first rim water discharge port 24 of the first water passage 28. For example, as shown in FIG. The flow path is narrowed by lowering the height of the upstream ceiling portion 28b shown in FIG. The resistance portion 90 may be formed in other shapes, for example, may be formed so as to increase the height of the bottom portion 28c to narrow the flow path, reduce the height of the ceiling portion 28b, and reduce the height of the bottom portion 28c. The flow path may be narrowed by increasing the height, the flow path may be narrowed by narrowing the distance between the left and right side walls of the first water passage 28, and the first water passage 28. It may be formed by adding another shape portion such as a protrusion protruding into the flow path that generates flow path resistance.

The flow passage cross-sectional area 28 a of the first water passage 28 in the portion where the resistance portion 90 is provided is formed to be the smallest of the flow passage cross-sectional areas of the first water passage 28. The resistance unit 90 is configured to generate a flow resistance when the flow rate of the passing wash water increases so as to suppress the flow rate of the wash water passing through to a predetermined flow rate. The size of the flow path cross-sectional area 28a determined by the resistance portion 90 is formed to be a size that allows the cleaning water to be discharged from the first rim water discharge port 24 to have a prescribed flow rate.
In the flush toilet according to the first embodiment of the present invention, the resistance portion 90 is formed at the position of the first rim water spouting port 24, but the first water channel upstream of the first rim water spouting port 24. 28 may be formed in the middle.

Next, although omitted in FIGS. 1 and 2, etc., the flow rate adjusting means 86 may be provided in the second water passage 30 of the toilet body 2 of the flush toilet 1 according to the first embodiment of the present invention. Explain that. Since the flow rate adjusting means 86 provided in the second water passage 30 has basically the same shape and function as the flow rate adjusting means 86 provided in the first water passage 28, the same reference numerals are used for explanation. The flow rate adjusting means 86 in the second water passage 30 may be provided together with the flow rate adjusting means 86 in the first water passage 28 or may be provided alone.
When the flow rate of the cleaning water in the second water passage 30 increases after the start of cleaning, and the water pressure in the second water passage 30 increases to a predetermined value or more, the second water passage 30 has a second rim discharge. A flow rate adjusting means 86 for adjusting the flow rate of the cleaning water discharged from the water port 26 and swirling on the inner peripheral surface to a constant value may be provided.

The flow rate adjusting means 86 includes a branch port 88 (not shown) provided upstream of the second rim water outlet 26 by a predetermined distance in the second water passage 30, and a downstream side of the branch port 88 in the second water passage 30. And a resistance portion 90 (not shown).
The branch port 88 of the flow rate adjusting means 86 forms an opening between the second water passage 30 and the bowl portion 8 on the back side of the second water passage 30 on the downstream side of the bent portion 30 d of the second water passage 30. Yes. The branch port 88 opens laterally from the second water passage 30 with respect to the streamline. When the flow rate of the wash water flowing into the second water passage 30 is large and the wash water accumulates on the upstream side of the resistance portion 90 and becomes locally full, the water pressure in the second water passage 30 becomes a predetermined value or more. The washing water can flow out from the branch port 88 to the bowl portion 8.

  The resistance portion 90 is formed in the second rim water discharge port 26 of the second water passage 30 so as to reduce the flow passage cross-sectional area 30a. For example, the height of the ceiling portion 30b is lowered to make the flow passage narrower. It is formed as follows. The resistance portion 90 may be formed in other shapes, for example, may be formed so as to increase the height of the bottom portion 30c to narrow the flow path, reduce the height of the ceiling portion 30b, and reduce the height of the bottom portion 30c. The flow path may be narrowed by raising the height, the flow path may be narrowed by narrowing the distance between the left and right side walls of the second water passage 30, and the second water passage 30. You may form by adding the other shape part which produces flow-path resistance in it.

The flow passage cross-sectional area of the second water passage 30 in the portion where the resistance portion 90 is provided is the smallest of the flow passage cross-sectional areas of the second water passage 30. The resistance portion 90 is configured to generate a flow resistance when the flow rate of the cleaning water passing therethrough increases. The size of the channel cross-sectional area determined by the resistance unit 90 is formed to a size that allows the cleaning water to be discharged from the second rim water discharge port 26 to have a prescribed flow rate.
When the flow rate of the cleaning water supplied from the jet pump unit 6 is a normal specified supply flow rate, until the flow rate of the cleaning water passing through the second water passage 30 reaches the specified flow rate, The inside of the 2nd water flow path 30 narrowed by the resistance part 90 can flow smoothly. Accordingly, the flow rate of the cleaning water discharged from the second rim water discharge port 26 is a substantially constant flow rate.
On the other hand, when the flow rate of the wash water that passes through the second water passage 30 is increased from the specified flow rate after the start of washing, the wash water is narrowed by the resistance portion 90. It becomes difficult to pass through the second rim water spouting port 26 due to resistance at the point, and is locally stored in the second water passage 30. At this time, the wash water is in a state where the water pressure is increased to a predetermined value or more in the second water passage 30, and flows from the second rim water spouting port 26 and branches from the branch port 88 and flows to the bowl portion 8. Divided into flows. Since the flow rate of the wash water discharged from the second rim water discharge port 26 is adjusted by the flow passage cross-sectional area of the second water passage 30 narrowed by the resistance portion 90, the flow rate becomes a substantially constant prescribed flow rate.
In the flush toilet according to the first embodiment of the present invention, the resistance portion 90 is formed at the position of the second rim water spouting port 26, but the second water passage upstream of the second rim water spouting port 26. 30 may be formed in the middle.

Next, the effect by the flush toilet 1 by 1st 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.

The wash water supplied from the water supply device 4 passes through the common water passage 10 and branches into the first water passage 28 and the second water passage 30 and flows. Immediately after the start of cleaning, the cleaning water flowing into the first water passage 28 passes through the side of the branch port 88, reaches the first rim water spouting port 24, and is spouted in a substantially horizontal direction toward the front. At this time, until the flow rate of the cleaning water passing through the first water passage 28 reaches the specified flow rate, such as when the flow rate of the cleaning water supplied from the jet pump unit 6 is a normal specified supply flow rate, the cleaning is performed. Water can smoothly flow through the first water passage 28 narrowed by the resistance portion 90, as indicated by the dashed arrow F1. Accordingly, the flow rate of the cleaning water discharged from the first rim water discharge port 24 is a substantially constant flow rate.
On the other hand, when the flow rate of the wash water that passes through the first water passage 28 is increased from the specified flow rate after the start of the washing, the wash water is supplied to the first water passage 28 as indicated by an arrow F2. The resistance portion 90 provided so as to narrow the first rim water spouting port 24 is subjected to resistance so that it is difficult to pass through the first rim water spouting port 24 and the first water passage 28 is locally filled with water. It will be in the state to be stored. At this time, the wash water is in a state in which the water pressure has increased to a predetermined value or more in the first water passage 28, and flows from the first rim spout 24 and the branch F 88 to branch to the bowl portion 8. It flows separately into flowing flow F4. Since the flow rate of the wash water discharged from the first rim water discharge port 24 as indicated by the arrow F3 is adjusted by the flow passage cross-sectional area 28a of the first water passage 28 narrowed by the resistance portion 90, it is substantially constant. The specified flow rate is obtained. The flow rate of the cleaning water flowing from the branch port 88 indicated by the arrow F4 to the bowl portion 8 is a portion that exceeds the substantially constant flow rate that can be discharged by the arrow F3 out of the flow rate of the cleaning water flowing in by the arrow F2.
Thus, even if the flow rate of the wash water flowing into the first water passage 28 increases, the flow rate of the wash water discharged from the first rim water spouting port 24 can be maintained at a substantially constant specified flow rate.

Further, as described above, the flow rate of the cleaning water discharged from the second rim water discharge port 26 is also adjusted by the flow passage cross-sectional area of the second water passage 30 narrowed by the resistance portion 90, so that it is almost constant. Flow rate. Therefore, even if the flow rate of the wash water flowing into the second water passage 30 increases, the flow rate of the wash water discharged from the second rim water discharge port 26 can be maintained at a substantially constant specified flow rate.
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. The washing water that has flowed out from the branch port 88 of the first water passage 28 toward the inside of the bowl portion 8 flows down the bowl portion 8 and reaches the recess 20. Similarly, the wash water that flows out from the branch port 88 of the second water passage 30 toward the inside of the bowl portion 8 flows down the bowl portion 8 and reaches the recess 20. In this way, the wash water flowing out from the branch port 88 (wash water exceeding the prescribed flow rate discharged from each water discharge port) flows so as not to affect the overflow of the wash water from the rim portion 18 of the bowl portion 8. be able to.

  Therefore, the flow rate of the cleaning water discharged from the first rim water discharge port 24 is maintained at a substantially constant flow rate, and the flow rate of the cleaning water discharged from the second rim water discharge port 26 is also set to a substantially constant specified flow rate. Therefore, the flow rate of the cleaning water turning around the inner peripheral surface 22 of the rim portion 18 can be set to a substantially constant flow rate. Therefore, stable bowl washing can be performed, and furthermore, the washing water can be prevented from overflowing from the rim part 18 of the bowl part 8 to the outside of the toilet body 2 by increasing the flow rate of the washing water.

  In the flush toilet 1 according to the above-described embodiment of the present invention, the water pressure of the large flow of wash water supplied by the jet pump action from the jet pump unit 6 varies after the start of washing, and the first water passage 28 and the second water passage 28 are supplied. When the water pressure in the water channel 30 is equal to or higher than a predetermined value, the cleaning water that is discharged from the first rim water discharge port 24 and the second rim water discharge port 26 by the flow rate adjusting means 86 and swirls around the inner peripheral surface 22 of the rim portion 18. The flow rate can be constant. Therefore, in the case where cleaning water is supplied to the toilet body 2 using a jet pump action for cleaning, stable bowl cleaning can be performed, and the cleaning water is discharged from the rim portion 18 of the bowl portion 8 to the outside of the toilet body 2. It is possible to prevent overflow. As a result, according to the present invention, it is possible to maintain the cleanability due to the overhang shape of the rim portion 18 and to achieve both water saving and cleanability of the bowl portion 8 by the jet pump unit 6.

  In the flush toilet 1 according to the present embodiment, the water pressure of a large flow of wash water supplied from the jet pump unit 6 by the jet pump action varies after the start of washing, and the first rim spout 24 and the second rim spout are discharged. When the washing water discharged from the water port 26 has a large flow rate, the resistance portion 90 provided on the downstream side of the branch port 88 in the first water passage 28 and the second water passage 30 becomes the resistance of the flow of the washing water. The inside of the 1st waterway 28 and the 2nd waterway 30 will be in a full state, and the water pressure in the 1st waterway 28 and the 2nd waterway 30 will become more than predetermined value. At this time, a part of washing water can be drained to the bowl part 8 from the branch port 88 provided in the 1st water flow path 28 and the 2nd water flow path 30 by the flow volume adjustment means 86, and the 1st rim water discharge port The flow rate of the cleaning water discharged from the 24 and the second rim water discharge port 26 and turning around the inner peripheral surface 22 of the rim portion 18 can be made constant. Therefore, in the case where cleaning water is supplied to the toilet body 2 using a jet pump action for cleaning, stable bowl cleaning can be performed, and the cleaning water is discharged from the rim portion 18 of the bowl portion 8 to the outside of the toilet body 2. It is possible to prevent overflow. As a result, according to the present invention, it is possible to maintain the cleanability due to the overhang shape of the rim portion 18 and to achieve both water saving and cleanability of the bowl portion 8 by the jet pump unit 6.

  Further, in the flush toilet 1 according to this embodiment, the branch port 88 of the flow rate adjusting means 86 has an opening between the first water passage 28 and the second water passage 30 and the bowl portion 8 on the back side of each water passage. Therefore, the inner peripheral surface of the rim portion 18 is discharged from the first rim water spouting port 24 and the second rim water spouting port 26 relatively easily without further providing a special flow path for draining the washing water. The flow rate of the swirling washing water can be made constant. Therefore, in the case where cleaning water is supplied to the toilet body 2 using a jet pump action for cleaning, stable bowl cleaning can be performed, and the cleaning water is discharged from the rim portion 18 of the bowl portion 8 to the outside of the toilet body 2. It is possible to prevent overflow. As a result, according to the present invention, it is possible to maintain the cleanability due to the overhang shape of the rim portion 18 and to achieve both water saving and cleanability of the bowl portion 8 by the jet pump unit 6.

  Next, a flush toilet according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 9 is a plan view illustrating a flush toilet according to the second embodiment of the present invention, and FIG. 10 illustrates a state in which flush water flows through the throttle portion of the first water passage in the flush toilet according to the second embodiment of the present invention. 11 is a partial cross-sectional view taken along line XI-XI in FIG. 10, and FIG. 12 is a partial cross-sectional view taken along line XII-XII in FIG. Since the basic structure of the flush toilet according to the second embodiment is the same as that of the first embodiment described above, only the structure of the second embodiment that is different from the first embodiment will be described.

As shown in FIG. 9, in the flush toilet 101 of the second embodiment, the structure of the first water passage 128 is different from that of the first embodiment.
In the first water passage 128, when the flow rate of the washing water in the first water passage 128 increases after the start of cleaning, and the water pressure in the first water passage 128 becomes a predetermined value or more, the first rim water spouting port is provided. A flow rate adjusting means 186 is provided for adjusting the flow rate of the cleaning water discharged from 124 and swirling on the inner peripheral surface 22 to be constant. The flow rate adjusting means 186 can adjust the flow rate supplied to the bowl portion 8 of the toilet body 2 on the downstream side of the water supply device 4 to a flow rate that prevents water overflow.

The flow rate adjusting unit 186 includes a throttle unit 190 provided in the first water passage 128. The throttle part 190 is formed in the predetermined part above the first rim water outlet 124 of the first water passage 128 so as to reduce the flow path cross-sectional area 128a. For example, as shown in FIGS. The channel is narrowed to reduce the channel cross-sectional area 128a.
The restricting portion 190 may be formed in another shape that can restrict the flow path. For example, the restricting portion 190 may be formed so as to narrow the flow path by reducing the height of the ceiling portion 128b, and the height of the bottom portion 128c. The channel may be narrowed by increasing the height, the channel may be narrowed by lowering the height of the ceiling portion 128b and increasing the height of the bottom portion 28c. The flow path may be narrowed by narrowing the distance between the left and right side walls of the water channel 128, and other shape portions such as protrusions projecting into the flow channel that generate flow resistance in the first water flow channel 128. The flow path may be narrowed by adding.

  The flow passage cross-sectional area 128 a of the first water passage 128 in the portion where the throttle portion 190 is provided is smaller than the flow passage cross-sectional area of the first rim water spouting port 124, and is within the flow passage cross-sectional area of the first water passage 128. The smallest is formed. The throttle unit 190 may be disposed in any part including the first rim water spouting port 124 of the first water passage 128, and the washing that passes so as to suppress the flow rate of the washing water that passes therethrough to a prescribed flow rate. When the flow rate of water increases, flow resistance occurs. The size of the flow path cross-sectional area 128a determined by the throttle unit 190 is formed so as to allow the cleaning water to be discharged from the first rim water discharge port 124 to have a prescribed flow rate.

Next, although omitted in FIG. 9 and the like, it is explained that the flow rate adjusting means 186 may be provided in the second water passage 130 of the toilet body 2 of the flush toilet 101 according to the second embodiment of the present invention. To do. Since the flow rate adjusting means 186 provided in the second water passage 130 has basically the same shape and function as the flow rate adjusting means 186 provided in the first water passage 128, the same reference numerals are used for explanation. The flow rate adjusting means 186 in the second water passage 130 may be provided together with the flow rate adjusting means 186 in the first water passage 128 or may be provided alone.
In the second water passage 130, when the flow rate of the washing water in the second water passage 130 increases after the start of cleaning, and the water pressure in the second water passage 130 becomes a predetermined value or more, the second rim spout A flow rate adjusting means 186 for adjusting the flow rate of the cleaning water discharged from 126 and swirling on the inner peripheral surface may be provided.

The flow rate adjusting unit 186 includes a throttle unit 190 provided in the second water passage 130. The throttle unit 190 is formed so as to reduce the channel cross-sectional area at a predetermined portion above the second rim water discharge port 126 of the second water passage 130, for example, the channel so as to reduce the channel cross-sectional area. It is formed by narrowing down.
As described above, the aperture portion 190 may be formed in another shape.

The flow passage cross-sectional area of the second water passage 130 in the portion where the throttle portion 190 is provided is the smallest among the flow passage cross-sectional areas of the second water passage 130. The throttle unit 190 may be disposed in any part including the first rim water spouting port 124 of the first water passage 128, and the washing that passes so as to suppress the flow rate of the washing water that passes therethrough to a prescribed flow rate. When the flow rate of water increases, flow resistance occurs. The size of the flow path cross-sectional area 128a determined by the throttle unit 190 is formed so as to allow the cleaning water to be discharged from the first rim water discharge port 124 to have a prescribed flow rate.
When the flow rate of the cleaning water supplied from the jet pump unit 6 is a normal specified supply flow rate, until the flow rate of the cleaning water passing through the second water passage 130 reaches the specified flow rate, It is possible to smoothly flow through the second water passage 130 narrowed by the throttle unit 190. Therefore, the flow rate of the cleaning water discharged from the second rim water discharge port 126 becomes a substantially constant flow rate.
On the other hand, when the flow rate of the wash water passing through the second water passage 130 is increased from the specified flow rate after the start of washing, the wash water is narrowed by the throttle unit 190. It becomes difficult to pass through the second rim spout 126 due to resistance at the point, and is locally stored in the second water passage 130. At this time, the wash water is in a state where the water pressure has increased to a predetermined value or more in the second water passage 130, and only the wash water that has passed through the throttle portion 190 is discharged from the second rim water discharge port 126. Since the flow rate of the wash water discharged from the second rim water discharge port 126 is adjusted by the flow passage cross-sectional area of the second water passage 130 narrowed by the throttle unit 190, the flow rate becomes a substantially constant prescribed flow rate.

Next, the effect by the flush toilet 1 by 2nd Embodiment of this invention mentioned above is demonstrated.
Also in the second embodiment configured as described above, the same flow rate adjusting means 186 is formed in the first water passage 128, and basically the same operational effects as the first embodiment described above are exhibited. Therefore, here, a different part of the second embodiment from the first embodiment will be described.

The washing water supplied from the water supply device 4 passes through the common water passage 10 and branches into the first water passage 128 and the second water passage 130 and flows. Immediately after the start of cleaning, the cleaning water that has flowed into the first water passage 128 passes through the throttle unit 190, reaches the first rim water spouting port 124, and is discharged in a substantially horizontal direction toward the front. At this time, when the flow rate of the cleaning water supplied from the jet pump unit 6 is a normal specified supply flow rate, the cleaning water is passed through the first water passage 128 until the flow rate of the cleaning water reaches the specified flow rate. As shown by the arrow F5, water can smoothly flow through the first water passage 128 narrowed by the throttle portion 190. Accordingly, the flow rate of the cleaning water discharged from the first rim water discharge port 124 is a substantially constant flow rate.
On the other hand, when the flow rate of the wash water passing through the first water passage 128 is increased from the specified flow rate after the start of washing, the wash water is narrowed as shown by an arrow F6. The throttle part 190 of the water passage 128 receives resistance and is difficult to pass through the throttle part 190 and is locally stored in a space upstream of the throttle part 190 in the first water passage 128. At this time, the wash water is in a state where the water pressure is increased to a predetermined value or more in the first water passage 128, and only the wash water that has passed through the throttle unit 190 is discharged from the first rim spout 124 as F7. The flow rate of the cleaning water discharged from the first rim water spouting port 124 indicated by the arrow F7 is adjusted by the flow passage cross-sectional area 128a of the first water passage 128 narrowed by the restricting portion 190, so that it has an almost constant regulation. Flow rate.
As described above, even if the flow rate of the cleaning water flowing into the first water passage 128 is increased, the flow rate of the cleaning water discharged from the first rim spouting port 124 is set to a substantially constant value by a relatively simple structure. The flow rate can be kept.

Further, as described above, the flow rate of the wash water discharged from the second rim water discharge port 126 is also adjusted by the flow passage cross-sectional area of the second water passage 130 narrowed by the throttle portion 190, so that it is almost constant. Flow rate. Therefore, even if the flow rate of the cleaning water flowing into the second water passage 130 increases, the flow rate of the cleaning water discharged from the second rim water discharge port 126 can be maintained at a substantially constant specified flow rate.
The wash water spouted forward from the first rim spout 124 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 the water mouth 126. On the other hand, the wash water discharged from the second rim water discharge port 126 similarly flows along the water passage on the inner peripheral surface 22 of the rim portion 18 and becomes a swirl flow that swirls in the same direction.

  Therefore, the flow rate of the cleaning water discharged from the first rim spout port 124 is kept at a substantially constant flow rate, and the flow rate of the cleaning water discharged from the second rim water discharge port 126 is also a substantially constant specified flow rate. Therefore, the flow rate of the cleaning water turning around the inner peripheral surface 22 of the rim portion 18 can be set to a substantially constant flow rate. Therefore, stable bowl cleaning can be performed, and furthermore, it is possible to prevent the washing water from overflowing from the rim portion 18 of the bowl portion 8 to the outside of the toilet body 2 due to an increase in the flow rate of the washing water.

  In the flush toilet 101 according to the above-described second embodiment of the present invention, the water pressure of the large flow of wash water supplied by the jet pump action from the jet pump unit 6 varies after the start of washing, and the first water passage 128 and the first When the water pressure in the two water passages 130 exceeds a predetermined value, the inner peripheral surface 22 of the rim portion 18 is discharged from the first rim water outlet 124 and the second rim water outlet 126 by the throttle portion 190 of the flow rate adjusting means 186. The flow rate of the cleaning water swirling can be made constant. Therefore, in the case where cleaning water is supplied to the toilet body 2 using a jet pump action for cleaning, stable bowl cleaning can be performed, and the cleaning water is discharged from the rim portion 18 of the bowl portion 8 to the outside of the toilet body 2. It is possible to prevent overflow. As a result, according to the present invention, it is possible to maintain the cleanability due to the overhang shape of the rim portion 18 and to achieve both water saving and cleanability of the bowl portion 8 by the jet pump unit 6.

DESCRIPTION OF SYMBOLS 1,101 Flush toilet 2 Toilet body 4 Water supply device 5 Water storage tank 6 Jet pump unit 8 Bowl part 18 Rim part 22 Inner peripheral surface 24, 124 First rim water outlet 26, 126 Second rim water outlet 28, 128 First Water passages 30, 130 Second water passages 86, 186 Flow rate adjusting means 88 Branch port 90 Resistance portion 190 Restriction portion

Claims (3)

A flush toilet that supplies washing water to a toilet body using a jet pump action to wash,
A bowl portion comprising a bowl-shaped filth-receiving surface, and a rim portion that is an upper edge and whose inner peripheral surface overhangs inward,
A rim water spouting part that forms a flow that spouts and swirls cleaning water along the inner peripheral surface of the rim part;
A water storage tank for storing cleaning water;
A jet pump unit that is disposed in a state where at least a part thereof is submerged in the water storage tank, and supplies a large amount of washing water to the toilet body continuously for a predetermined time by a jet pump action;
A water passage extending from the jet pump unit to the rim water spouting unit,
A flow rate adjustment that is provided in the water passage and makes the flow rate of the washing water discharged from the rim water spouting portion and swirling around the inner peripheral surface constant when the water pressure in the water passage becomes a predetermined value or more after the start of cleaning. And a flush toilet.   The flush toilet according to claim 1, wherein the flow rate adjusting means includes a branch port provided in the water passage and a resistance portion provided downstream of the branch port in the water passage.   The flush toilet according to claim 2, wherein the branch port of the flow rate control means forms an opening between the water passage and the bowl portion on the back side of the water passage.

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