JP2015183484A - Water closet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water closet that can both save water and have washability of a bowl part.SOLUTION: A water closet 1 is configured to wash a toilet body 2 by supplying washing water thereto, and includes: a water supply device 4 which supplies the water to the toilet body 2; a bowl part 8 which includes a muck receiving surface 16 in a bowl shape and a rim part 18 located at an upper edge and having an inner peripheral surface; and a first rim water discharge port 24 and a second rim water discharge port 26 which discharge the washing water supplied from the water supply device 4 along the inner peripheral surface of the rim part 18 to form swirling flows in the same direction. The inner peripheral surface of the rim part 18 is formed in an overhang shape, and a water feed path for the washing water is formed of the overhang shape of the inner peripheral surface. The first rim water discharge port 24 discharges the washing water supplied from the water supply device 4 substantially horizontally along the inner peripheral surface of the rim part 18, and the second rim water discharge port 26 discharges the washing water supplied from the water supply device 4 downward along the inner peripheral surface of the rim part 18.

Description

  The present invention relates to a flush toilet, and more particularly to a flush toilet in which flush water having a constant large flow rate is continuously supplied to a toilet body for a predetermined time.

  Conventionally, in order to improve the cleanability of the toilet bowl, in the bowl part of the toilet bowl, the rim part is formed with an overhang shape that protrudes upward into the inner space of the bowl part, and the washing water is horizontally directed from the rim spout A flush toilet is known in which water is discharged into the bowl and the washing water swirls around the inner peripheral surface of the rim portion to flow down to the bowl surface of the bowl portion for washing.

  In the flush toilet having such a structure, since the rim portion of the bowl portion is formed in an overhang shape, “water jumping out by centrifugal force” is a problem. This “jumping out of water by centrifugal force” means that the bowl part of the toilet bowl has an oval shape with the smallest radius of curvature on the front side, so that the washing swivels along the inner peripheral surface of the rim part. When water passes through the inner peripheral surface of the rim portion on the front side, it refers to the phenomenon of being influenced by centrifugal force and jumping out of the bowl portion along the inner peripheral surface. In order to suppress such “spouting of water due to centrifugal force”, for example, as described in Patent Document 1, the degree of overhang of the rim portion on the front side of the bowl portion is increased. Are known. In addition, as described in Patent Document 1, it is also known that a water outlet is additionally provided at the rear portion of the rim portion in order to efficiently clean the rear side of the bowl portion.

  In addition, in a flush toilet with an overhanged rim, a jet pump mechanism (for example, patents) that can continuously supply strong water to the bowl surface of the toilet in order to meet the demand for water saving recently. Application of (Ref. 2) has been studied to achieve both water saving and ensuring the washability of the bowl.

JP2013-44182A JP 2004-156382 A

  However, for example, when washing water is supplied to the toilet body by the above-described jet pump mechanism, strong water is continuously supplied to the toilet body for a long time, whereby two rim spouts (first and first) The large amount of wash water discharged from the (2 rim water discharge port) continuously turns on the inner peripheral surface of the rim portion. At this time, the wash water discharged at a large flow rate is washed by the combination of the wash water discharged from the first rim discharge port and the wash water discharged from the second rim discharge port in the vicinity of the second rim discharge port. There was a problem of water jumping out of the toilet body.

  Specifically, as shown in FIG. 8, in the second rim spout 100a of the rim portion 100, the inner peripheral surface 102 of the rim portion 100 is formed in an overhang shape, and a water passage is formed from the lower end 102a to the upper end 102b. It is formed. Wash water M1 discharged from the first rim spout catches up with the wash water M2 spouted from the second rim spout, rides on the wash water or pushes out a part of the wash water, and the wash water M3 It will jump out upward. FIG. 8 is a partial development view of a region in the vicinity of the second rim spout of the rim portion viewed from the inner space of the bowl portion.

  In particular, in a flush toilet having a jet pump mechanism, the amount of washing water from the rim spout becomes a large flow rate, so that the water jumps out of the toilet body from the rim due to the merge of the washing water. This jumping out of water is an important issue that must be solved in order to continuously supply vigorous water to the bowl of the toilet body to achieve water saving.

  Thus, an object of the present invention is to provide a flush toilet that can achieve both water saving and washability of the bowl portion.

  One aspect of the present invention is a flush toilet that supplies wash water to a toilet body for washing, and is connected to the toilet body, and a constant large flow of wash water is continuously supplied to the toilet body for a predetermined time. A bowl portion comprising a water supply device to be supplied, a bowl-shaped filth receiving surface, a rim portion located at the upper edge and having an inner peripheral surface, and the cleaning water supplied from the water supply device to the inside of the rim portion A first rim water spouting port and a second rim water spouting port that discharge water along the peripheral surface to form a swirling flow in the same direction, and supply cleaning water from the water supply device to the first rim water spouting port and the second rim water spouting port, respectively. The rim portion is formed in an overhang shape in which the inner peripheral surface is exposed to the inner space of the bowl portion and extends upward toward the inner space. The flow path for the wash water is formed by the overhang shape of the inner peripheral surface. The first rim spout spouts the cleaning water supplied from the water supply device in a substantially horizontal direction along the inner peripheral surface of the rim portion, and the second rim spout spout is supplied from the water supply device. A flush toilet characterized in that flush water is discharged downward along the inner peripheral surface of the rim portion.

  In the invention configured as described above, the wash water discharged from the second rim spout flows downward, so that the wash water discharged from the first rim spout is discharged from the second rim spout. When catching up with the wash water, the wash water discharged from the first rim spout is converted into a downward flow by the wash water having a downward vector discharged from the second rim spout. As a result, according to the present invention, the wash water can be prevented from jumping out of the toilet body from the rim portion. Furthermore, it is possible to achieve both water saving and washability of the bowl portion while maintaining the cleanability by the overhang shape at the rim portion.

  In a selective aspect of the present invention, the flush channel is characterized in that the second water passage is inclined upward from the second rim spout toward the upstream.

  In the invention configured as described above, the second water passage is inclined upward from the second rim water outlet, so that the wash water discharged from the second rim water outlet surely flows downward. Therefore, when the wash water spouted from the first rim spout catches up with the wash water spouted from the second rim spout, the wash water spouted from the first rim spout spouts from the second rim spout. Is converted into a downward flow by the wash water having a downward vector. As a result, according to the present invention, it is possible to reliably prevent the washing water from jumping out of the toilet body from the rim portion. Furthermore, it is possible to achieve both water saving and washability of the bowl portion while maintaining the cleanability by the overhang shape at the rim portion.

  In a selective aspect of the present invention, the first rim spouting port is located on a side portion of the rim portion, the washing water is spouted to the front side of the bowl portion, and the second rim spout is the rim. It is a flush toilet characterized by being located in the rear part of a section.

  In the aspect configured as described above, the cleaning water discharged from the first rim water spouting water swirls from the first rim water discharging mouth because it swirls around the front side of the bowl portion and travels toward the second rim water discharging port. As the momentum of the cleaning water weakens while swirling on the front side of the bowl portion, the weakened cleaning water discharged from the first rim spouting port has a downward direction vector discharged from the second rim spouting port. Is easily converted into a downward flow. As a result, according to the present invention, it is possible to reliably prevent the washing water from jumping out of the toilet body from the rim portion. Furthermore, it is possible to achieve both water saving and washability of the bowl portion while maintaining the cleanability by the overhang shape at the rim portion.

  In a selective aspect of the present invention, the water supply device includes a water storage tank that stores wash water, and a jet pump unit that is disposed in a state where at least a part thereof is submerged in the water storage tank. The unit has one end connected to the entrance of the water conduit of the toilet body, and the other end formed with a suction port, the throat pipe disposed so that the suction port is located in the lower part of the water storage tank, A flush toilet comprising a jet nozzle for injecting washing water toward the suction port of the throat pipe to induce a jet pump action.

  In the aspect configured as described above, even when the jet pump unit supplies a constant large flow of flush water to the toilet body continuously for a predetermined time, the flush water spouted from the first rim spout Is converted into a downward flow by the wash water having a downward vector discharged from the second rim spout, so that the wash water can be prevented from jumping out of the toilet body.

  According to the flush toilet of the present invention, both water saving and washability of the bowl part can be achieved.

It is a top view which shows the flush toilet bowl by embodiment of this invention. It is sectional drawing seen along the II-II line of FIG. It is sectional drawing seen along the III-III line of FIG. It is a top view which shows the water supply apparatus of the flush toilet bowl by embodiment of this invention. FIG. 5 is a front view of FIG. 4. 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 by the water supply apparatus of FIG. 4, and time. Partial development view of a region near the second rim spout of the rim portion viewed from the inner space of the bowl portion

  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 is a plan view showing a flush toilet according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is taken along line III-III in FIG. It is sectional drawing of the 2nd rim spout vicinity vicinity seen along. In the present specification, the front end side of the flush toilet 1 is the front, the water storage tank 5 side is the rear, the left side as viewed from the user standing in front of the flush toilet 1, the right side, upward along the vertical direction, This will be described as lower.

A flush toilet 1 according to an embodiment of the present invention is a floor drainage type flush flush toilet in which a drain trap pipe 34 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 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 can also be applied to a direct pressure flush toilet that does not have the water storage tank 5 and is supplied with wash water directly from the water supply, or a flush toilet that is supplied with flush 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 wash water is formed in a side portion slightly rearward of the central portion on the left side when viewed from the front of the flush toilet 1, and a second rim is formed on the right rear portion when viewed from the front. A water discharge port 26 is formed. The first rim water spouting port 24 and the second rim water spouting port 26 are swirled 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.

  As shown in FIG. 3, the second water passage 30 is inclined upward from the second rim spout 26 toward the upstream side. That is, the wash water W1 supplied from the second water passage 30 and flowing in the horizontal direction flows in the downward direction by flowing along the inclined surface formed in the second water passage 30 immediately before the second rim spout 26. The cleaning water W <b> 2 flows through the rim portion 18, and is discharged downward along the inner peripheral surface 22 of the rim portion 18. The water discharge direction from the second rim water discharge port 26 is directed downward from the water discharge direction from the first rim water discharge port 24. Specifically, the inclination of the second water passage 30 is inclined by 18 degrees with respect to the horizontal. The inclination angle is preferably in the range of 11 to 34 degrees.

  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 1 according to the present embodiment is not limited to this configuration, and the first rim water outlet 24, the first water passage 28, the second rim water outlet 26, and the second water passage 30 are separated from the toilet body 2. It may be formed by a distributor or the like.

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 rearward and downward, and drainage connected to the water conduit 32 and extending upward. A trap conduit 34. The water conduit 32 has substantially the same diameter (substantially the same cross-sectional shape) except for the inlet 32a, and the inside of the pipe has the same cross-sectional area. The drain trap pipe 34 is composed of an ascending path 34a and a descending path 34b.
The water conduit 32 is connected to the bottom surface of the recess 20 as a smooth continuous curved surface, so that the cleaning water flowing from the recess 20 into the introduction conduit 32 flows smoothly through the introduction conduit 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. 4 is a plan view showing a water supply device of the flush toilet 1 according to an embodiment of the present invention, FIG. 5 is a front view of FIG. 4, and FIG. 6 is a schematic front view showing the water supply device of FIG. FIG. 7 is a diagram showing the relationship between the instantaneous flow rate of cleaning water supplied by the water supply apparatus of FIG. 4 and time. In FIG. 6, for convenience, the arrangement of the jet nozzle 44 and the throat pipe 42 is depicted in an arrangement different from that shown in FIGS. 4 and 5.

  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 communicating with the common water passage 10 of the toilet body 2, and a suction port 42 a is formed at the upstream end thereof, and this suction port 42 a serves as the water storage tank 5. It is located at the bottom inside. 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 in the pressure chamber 54, and a first pilot that opens and closes the first hole 56 in conjunction with the user's manual operation on 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 32 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. 5, 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 communicates with the bleed hole, the water pressure in the primary channel A and the pressure chamber 54 is the same water pressure (= primary channel pressure α), and the secondary channel B is open to the atmosphere. Since the area where water pressure acts on the valve 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 channel 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 in the primary 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 then delayed for a predetermined time. The valve body 52 becomes a valve closing state (water stop state).

  Next, as shown in FIG. 6, near 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. 6, 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. 7, the water supply device 4 provided with the jet pump unit 6 can continuously supply a large amount of flush water to the toilet body 2 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 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 1 to start cleaning the bowl portion 8. At this time, as shown in FIG. 7, a constant large flow of flushing water is continuously supplied from the water supply device 4 to the toilet body 2 for a predetermined time.

  In the toilet body 1, the first rim spout 24 discharges the cleaning water in the substantially horizontal direction toward the front of the bowl portion 8, and the second rim spout 26 in the downward direction with the cleaning water directed rearward. Water is discharged and a swirl flow swirling in the same direction (counterclockwise) is formed.

  The wash water spouted forward from the first rim spout 24 swivels around the front end of the bowl portion 8, flows to the rear side of the bowl portion 8, and catches up with the wash water spouted from the second rim spout 26. At this time, in the flush toilet 1 of the present embodiment, the direction of the wash water discharged from the second rim spout 26 is directed downward so that the wash water discharged from the first rim spout 24 is It is possible to prevent the wash water from overflowing upwards and overflowing by riding on the wash water discharged from the two-rim water discharge port 26 or pushing out a part of the wash water discharged from the first rim water discharge port 24.

  As described above, in the flush toilet 1 according to the present embodiment, the wash water discharged from the second rim spout 26 is discharged downward, so that water is discharged from the first rim spout 24. When the wash water catches up with the wash water spouted from the second rim spout 26, the wash water spouted from the first rim spout 24 has a downward vector discharged from the second rim spout 26. It is converted into a downward flow by the washing water. As a result, the wash water can be prevented from jumping out of the toilet body from the rim portion 18. Furthermore, it is possible to achieve both water saving and cleanability of the bowl portion 8 while maintaining the cleanability due to the overhang shape in the rim portion 18.

  In addition, as described above, the first rim spout 24 is located on the side of the rim 18, discharges wash water to the front side of the bowl 8, and the second rim spout 26 is behind the rim 18. Since the cleaning water discharged from the first rim water spouting port 24 turns to the second rim water spouting port 26 by turning to the front side of the bowl portion 8, the water discharged from the first rim water spouting port 24 is discharged. The momentum of the wash water weakens as it swirls forward in the bowl portion, and the weak wash water spouted from the first rim spout port 24 has a downward vector discharged from the second rim spout port 26. It is converted into a downward flow by the wash water it has. As a result, according to the present invention, it is possible to reliably prevent the washing water from jumping out of the toilet body from the rim portion 18. Furthermore, it is possible to achieve both water saving and cleanability of the bowl portion 8 while maintaining the cleanability due to the overhang shape in the rim portion 18.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements included in each of the specific examples described above and their arrangement, materials, conditions, shapes, sizes, and the like are not limited to those illustrated, but can be changed as appropriate. Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 4 Water supply device 5 Water storage tank 6 Jet pump unit 7 Skirt part 8 Bowl part 10 Water passage 12 Drainage pipe 16 Soil receiving surface 18 Rim part 20 Recessed part 22 Inner peripheral surface 24 1st rim water outlet 26 Second rim outlet 28 First water passage 30 Second water passage 32 Water conduit 32a Inlet 34 Trap conduit 34a Ascending passage 34b Down passage 45 Drain outlet 80 Water passage

Claims (4)

A flush toilet that supplies washing water to the toilet body for washing,
A water supply device connected to the toilet body and supplying a constant large flow of flush water to the toilet body continuously for a predetermined time;
A bowl portion comprising a bowl-shaped filth receiving surface, and a rim portion located on the upper edge and having an inner peripheral surface;
A first rim water spouting port and a second rim water spouting port that spout the cleaning water supplied from the water supply device along the inner peripheral surface of the rim portion to form a swirling flow in the same direction;
A first water passage and a second water passage that supply wash water from the water supply device to the first rim water outlet and the second rim water outlet, respectively.
The rim portion is formed in an overhang shape whose inner peripheral surface is exposed in the inner space of the bowl portion and extends upward toward the inner space. Formed,
The first rim spout spouts the wash water supplied from the water supply device in a substantially horizontal direction along the inner peripheral surface of the rim portion, and the second rim spout spout has the wash water supplied from the water supply device. A flush toilet, wherein water is discharged downward along the inner peripheral surface of the rim portion.   The flush toilet according to claim 1, wherein the second water passage is inclined upward from the second rim spout toward the upstream.   The first rim water spouting port is located on a side portion of the rim portion, the washing water is spouted on the front side of the bowl portion, and the second rim water spouting port is located on a rear portion of the rim portion. The flush toilet according to claim 1 or claim 2. The water supply device includes a water storage tank for storing cleaning water, and a jet pump unit disposed in a state where at least a part thereof is submerged in the water storage tank,
One end of the jet pump unit is connected to the inlet of the water conduit of the toilet body, and a suction port is formed at the other end. The throat is arranged so that the suction port is located in the lower part of the water storage tank. The flush toilet according to any one of claims 1 to 3, further comprising: a pipe; and a jet nozzle for injecting washing water toward the suction port of the throat pipe to induce a jet pump action. .