JP6547929B2 - Flush toilet bowl - Google Patents

Description

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

  Conventionally, in order to improve the cleaning performance of the toilet bowl, the rim portion of the bowl portion of the toilet bowl is formed in an overhang shape projecting upward to the inner space of the bowl portion, and the washing water is horizontal from the rim spout There is known a flush toilet in which water is spouted and the flush water swirls on the inner peripheral surface of the rim to flow down to the bowl surface of the bowl for cleaning. In such a flush toilet, for example, as shown in Patent Document 1, a second rim spout is provided in addition to the first rim spout, and spouted from these two rim spouts. It is also known to wash the bowl with wash water.

  On the other hand, as shown, for example, in Patent Document 2, there is known a toilet provided with a jet pump mechanism capable of continuously supplying flush water to the toilet for a long time.

Patent No. 3817734 gazette Unexamined-Japanese-Patent No. 2004-156382

  A flush toilet including a first rim spout and a second rim spout and a rim portion formed by an overhang shape projecting upward to the inner space of the bowl portion, the flush water of the above-mentioned jet pump mechanism etc. If a mechanism for continuously supplying the toilet bowl for a long time is used, the second rim spout that is the flush water with the force of spouting from the first rim spout in the downstream region of the second rim spout (the rear region of the bowl portion) There is a problem that the overflowing occurs by pushing up the spouted flush water from the spout. In particular, in the toilet bowl where the flush water is spouted only from the rim spout port (a jet spout port for discharging flush water is not provided at the bottom of the bowl), the amount of flush water spouted from the rim spout port increases. Overflow from the department to the outside of the toilet becomes noticeable and is a problem.

  In order to prevent this overflow, it is conceivable to tighten the overhang shape of the rim portion in the downstream region (rear region of the bowl portion) of the second rim spout, but in the rear region of this bowl portion Since the distance between the seat fixing hole and the water flow passage connected to the second rim spout is short, and there is a limit in tightening the overhang shape of the rim, the overflow shape alone prevents the occurrence of water overflow It is a situation that can not be done.

  The present invention has been made to solve the above-described problems of the prior art, and can prevent the occurrence of water overflow from the rim portion of the bowl portion, and can further improve the cleaning performance. The purpose is to provide a toilet bowl.

In order to achieve the above-mentioned object, the present invention is a flush toilet for flushing and supplying flush water to a toilet bowl body, wherein the feed water is supplied to the toilet bowl body continuously for a predetermined time with a constant large flow of flush water. A bowl portion comprising a device, a bowl-shaped dirt receiving surface, and a rim portion located at an upper edge and having an inner circumferential surface exposed to the inside, and spouting washing water along the inner circumferential surface of the rim portion A first rim spouting portion that forms a swirling flow, and a second rim spouting portion that spouts flush water in the same direction as the swirling flow formed by the first rim spouting portion along the inner circumferential surface of the rim portion; The first rim water spouting system includes a first water flow path for supplying flush water from the water supply device to the first rim spout portion, and a second water path for supplying flush water from the water supply device to the second rim spout portion. The wash water is supplied to the bowl portion only from the head portion and the second rim spout portion, and the region immediately upstream of the second rim spout portion is A guide is provided on the inner peripheral surface of the rim to guide the direction of the washing water spouted from the first rim water spouting part, and the guide is formed on the arc-shaped arc part formed on the upstream side and the tip It consists of a guide wall surface provided with the linear part formed in a straight line, and the direction of the flush water spouted from the first rim spout portion to reach the second rim spout portion and the flush water spouted from the second rim spout portion The straight portion of the guide wall surface is formed in a direction parallel to the downstream portion of the second water flow passage in plan view so that the direction is parallel to the plan view, whereby the downstream region of the second rim water discharge portion The flush water spouted from the second rim spout portion joins the flush water spouted from the first rim spout portion, and the water supply device comprises a water storage tank for storing the flush water and at least a part thereof. Jet port placed submerged in the reservoir tank It is characterized in that it comprises a Puyunitto.
In the present invention configured as described above, flush water of a constant large flow rate is continuously supplied to the toilet body by the water supply device for a predetermined time, and furthermore, flush water only from the first rim spout portion and the second rim spout portion A guide for guiding the direction of washing water spouted from the first rim spouting portion to the inner peripheral surface of the rim portion immediately upstream of the second rim spouting portion even when the water is supplied to the bowl portion The guide portion includes a guide wall surface including an arc-shaped arc portion formed on the upstream side and a straight portion formed at the tip end portion, and water is discharged from the first rim water discharge portion. The straight part of the guide wall surface is downstream of the second water passage so that the direction of the flush water reaching the rim spout portion and the direction of the flush water spouted from the second rim spout portion become parallel in plan view. Formed in a direction parallel to the portion in plan view, thereby In the downstream region of the rim spouting portion, the flush water spouted from the second rim spout portion joins the flush water spouted from the first rim spout portion, so the first rim spout portion spouts water from the second rim spout portion The flush water reaching the rim spout portion and the flush water spouted from the second rim spout portion join smoothly, and both do not collide violently. As a result, according to the present invention, it is possible to prevent the occurrence of overflow in the downstream region of the second rim spouting portion, and furthermore, the first rim spout portion with the flush water spouted from the second rim spout portion The washing water from the above smoothly joins, and the bowl portion can be washed with the washing water having the combined turbulence suppressed, and the washing performance can be improved. Furthermore, in the present invention, since the straight portion of the guide wall surface is formed in a direction parallel to the downstream portion of the second water flow passage in plan view, the flush water spouted from the second rim spout portion and the first rim spout The flush water spouted from the portion can be smoothly joined smoothly in the downstream region of the second rim spout portion. Further, in the present invention, even if the water supply apparatus is a jet pump unit that continuously supplies a constant large flow of cleaning water to the toilet body for a predetermined time, water overflow is prevented in the downstream region of the second rim spouter. Therefore, the cleaning performance can be improved. Further, even if water saving is achieved, the toilet bowl cleaning performance becomes good.

In the present invention, preferably, the inner peripheral surface of the rim portion in the downstream region of the second water discharge portion is formed in a direction parallel to the straight portion of the guide wall surface of the guide portion in plan view .
In the present invention thus configured, the inner peripheral surface of the rim portion in the downstream region of the second water discharge portion is formed in a direction parallel to the straight portion of the guide wall surface of the guide portion in plan view . [2] Even after the flush water spouted from the first rim spout portion merges with the flush water spouted from the rim spout portion in the downstream region of the second rim spout portion, it flows smoothly with disturbance being suppressed As a result, it is possible to prevent the occurrence of water overflow in the downstream region of the second rim water spouting part, and it is possible to improve the cleaning performance.

In the present invention, preferably, the bottom portion of the inner peripheral surface of the rim portion downstream of the second water discharge portion and the bottom surface of the inner peripheral surface of the rim portion immediately upstream of the second rim water discharge portion are continuous It is formed of a flat surface.
In the present invention configured as described above, the bottom of the inner peripheral surface of the rim portion in the downstream region of the second water discharge portion, and the bottom surface of the inner peripheral surface of the rim portion in the region immediately upstream of the second rim water discharge portion When the flush water spouted from the first rim spout portion merges with the flush water spouted from the second rim spout portion in the downstream region of the second rim spout portion because the flush water spouted from the second rim spout portion Since the disturbance received from the bottom surface of the inner peripheral surface of the rim portion can be suppressed, the flush water spouted from the first rim spout portion to the flush water spouted from the second rim spout portion, the second rim spout water It can be merged more smoothly in the downstream area of the section. As a result, according to the present invention, the occurrence of water overflow in the downstream region of the second rim water discharger can be prevented, and the cleaning performance can be improved.

In the present invention, preferably, the radius of curvature of the arc portion of the guide wall surface of the guide portion is 30 to 60 mm in plan view.
In the present invention configured as described above, the curvature radius of the arc portion of the guide wall surface of the guide portion is 30 to 60 mm in plan view, and the direction of the flush water spouted from the first rim spout portion is disturbed. It is possible to suppress and change smoothly, and the flush water spouted from the first rim spout portion is merged with the flush water spouted from the second rim spout portion more smoothly in the downstream region of the second rim spout portion be able to. As a result, according to the present invention, the occurrence of water overflow in the downstream region of the second rim water discharger can be prevented, and the cleaning performance can be improved.

In the present invention, preferably, the length of the straight portion of the guide wall surface of the guide portion is 30 to 80 mm.
In the present invention configured as described above, since the length of the straight portion of the guide wall surface of the guide portion is 10 to 20 mm, the disturbance of the wash water spouted from the first rim water spout portion is suppressed to smoothly operate. The cleaning water spouted from the second rim spouting portion can be smoothly joined to the cleaning water spouted from the first rim spouting portion in the downstream region of the second rim spouting portion. As a result, according to the present invention, the occurrence of water overflow in the downstream region of the second rim water discharger can be prevented, and the cleaning performance can be improved.

  According to the flush toilet according to the present invention, the occurrence of water overflow from the rim portion of the bowl portion can be prevented, and furthermore, the flush performance can be improved.

It is a top view showing a flush toilet according to an embodiment of the present 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 sectional drawing seen along the IV-IV line of FIG. It is sectional drawing seen along the VV line of FIG. It is sectional drawing seen along the VI-VI line of FIG. It is a top view showing the water supply apparatus of the flush toilet according to the embodiment of the present invention. It is a front view of FIG. It is a schematic front view which shows the water supply apparatus of FIG. It is a diagram which shows the relationship of the instantaneous flow volume of the wash water supplied by the water supply apparatus of FIG. 7, and time. It is a fragmentary sectional view seen along the XI-XI line of FIG. It is a 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 attached 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 cross-sectional view taken along line II-II of FIG. 1, and FIG. 3 is a view taken along line III-III of FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 1, and FIG. 5 is a cross-sectional view taken along the line V-V of FIG. 6 is a cross-sectional view taken along the line VI-VI in FIG.

The flush toilet 1 according to the embodiment of the present invention is a flush type flush toilet of the floor drainage type in which a drainage pipe described later is connected to a drainage 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 for supplying flush water to the toilet body 2. The toilet body 2 is made of pottery with a glaze layer formed on the surface, a skirt 7 is formed in the lower part, a bowl 8 is formed in the front in the upper half, and an upstream end is a water supply device in the upper rear A common water flow passage 10 communicating with 4 is formed, and further, a drainage pipe line 12 for discharging the waste is formed at the lower rear portion.

  The water supply apparatus 4 mentioned above is provided with the water storage tank 5 and the jet pump unit 6 mentioned later. In addition. The present invention can also be applied to a direct pressure flush toilet with flush water supplied directly from a water supply without a reservoir tank, and a flush toilet with flush water supplied by a flush valve.

  The bowl portion 8 includes a bowl-shaped dirt receiving surface 16, a rim portion 18 located at the upper edge, and a recess 20 formed below the dirt receiving surface 16. Here, as shown in FIG. 2 and the like, 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 speaking, it is exposed to the inner side It is formed in an overhang shape.

  A first rim spout 24 for spouting washing water is formed slightly behind the central portion on the left side viewed from the front of the inner peripheral surface 22 of the rim portion 18 of the bowl portion 8, and on the right rear side as viewed from the front , The second rim spout 26 is formed. Each of the first rim spout 24 and the second rim spout 26 spouts the washing water in the same direction (counterclockwise in FIG. 1) to form a swirling flow.

  Further, the common water passage 10 formed at the rear upper portion of the flush toilet 1 described above is branched into the first water passage 28 and the second water passage 30 toward the toilet bowl forward. The first water passage 28 is for supplying washing water to the first rim spout 24, and the second water passage 30 is for supplying washing water to the second rim spout 26.

  In the flush toilet 1 described above, the first rim spout 24, the first water passage 28, the second rim spout 26, and the second water passage 30 are integrally formed with the toilet bowl body 2 made of pottery. The flush toilet according to the present embodiment is not limited to this embodiment, and the first rim spout, the first water passage and the second rim spout, and the second water passage may be separated by a distriviator or the like separate from the toilet body. It may be formed.

  Here, as shown in FIG. 3 to FIG. 6, the region from the first rim spout 24 to the second rim spout 26 of the rim portion 18 is a water passage along which the washing water flows along the inner peripheral surface 22 As mentioned above, it is formed in the shape overhanging toward the inside so that it may become.

Furthermore, the drainage pipeline 12 is connected to the bottom surface of the recess 20, has an approximately the same diameter (approximately the same cross-sectional shape), and extends downward and rearward, the introduction pipeline 32; And a trap conduit 34. The water conduit 32 has substantially the same diameter (approximately the same cross-sectional shape) except for the inlet 32a, and the cross-sectional area in the conduit is the same. Further, the drainage trap pipe line 34 is formed of an ascending path 34 a and a descending path 34 b.
The water guiding 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 in 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. 7 to 10. 7 is a plan view showing a water supply device for a flush toilet according to an embodiment of the present invention, FIG. 8 is a front view of FIG. 7, and FIG. 9 is a schematic front view showing the water supply device of FIG. FIG. 10 is a diagram showing the relationship between the instantaneous flow rate of the wash water supplied by the water supply device of FIG. 7 and time. It should be noted that in FIG. 9 the arrangement of jet nozzles and throat tubes is depicted in an arrangement different from that shown in FIGS. 7 and 8 for convenience.

  The water supply device 4 of the flush toilet 1 includes a water storage tank 5, a water supply pipe 36 for supplying flush water to the water storage tank 5, a water supply valve device 38 provided for the water supply pipe 36, and the water supply pipe. A jet pump unit 6 provided at the downstream end of the 36 for supplying flush water to the toilet body 2 and a manual lever 40 for manually feeding flush water by the user are provided.

  The upstream end of the water supply conduit 36 is provided with a water stop valve 41 for stopping washing water supplied from an external water supply source. The water stop valve 41 is held in an open state 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 drainage 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 at the lower part in the water storage tank 5. Furthermore, the jet nozzle 44 is disposed to face the suction port 42 a of the throat pipe 42, and the suction port 42 a of the throat pipe 42 and the jet nozzle 44 are constantly 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 has negative pressure. By inducing a 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 come together. It flows through the throat pipe 42 and is supplied to the common water passage 10 of the toilet body 2 through the drainage port 45.

  In the water supply conduit 36, in addition to the above-described water supply valve device 38, a constant flow rate valve 46 is provided on the upstream side of the water supply valve device 38, and a vacuum breaking valve 48 is provided on the downstream side. The constant flow valve 46 is for setting the flow rate of cleaning water supplied to the water supply valve device 38, and the vacuum breaking valve 48 sucks air from the outside and passes from the vacuum breaking valve 48 to the jet nozzle 44. It is to prevent the negative pressure in the pipe line.

  The water supply valve device 38 is a pilot-type diaphragm valve, and switches between the main valve seat 50, a water stop state where the main valve seat 50 is seated and shuts off, 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 by the pressure inside thereof are provided. The pressure chamber 54 includes a first hole 56 and a second hole 58 for releasing the pressure of the pressure chamber 54, and a first pilot for opening and closing the first hole 56 in conjunction with the manual operation of the user at the manual lever 40 described above. A valve 60, a float 62 moving up and down with the flush water level in the reservoir tank 5, and a second pilot valve 64 opening and closing the second hole 58 by moving the float 62 up and down are provided.

  Further, a bleed hole (not shown) is provided in the main valve body 52, and in the water stop state, the primary side flow passage A of the water supply conduit 36 and the inside of the pressure chamber 54 are communicated by the bleed hole. It is supposed to Here, the opening area of the first hole 56 is larger than the opening area of the second hole 58. In addition, 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 the drive shaft 65, and opens and closes the first hole 56 by the manual operation of the manual lever 40 by the user. Here, in FIG. 8, the manual lever 40 is largely cleaned when it is pivoted to the front side (one direction), and is small when it is pivoted to the back side (other direction). It is supposed to be done.

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

  In the feed valve device 38, when the first hole 56 and / or the second hole 58 is opened by the first pilot valve 60 and / or the second pilot valve 64, flush water flows out from the pressure chamber 54, and the pressure chamber 54 As the internal pressure decreases, the main valve body 52 moves away from the main valve seat 50, opens, and becomes 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 channel pressure again, and the main valve body 52 Moves toward the main valve seat 50, and is finally in a closed state (water stop state). At this time, the cleaning water in the primary side flow path A is injected little by little into the pressure chamber 54 from the bleed hole, so after closing the first hole 56 and the second hole 58, the main chamber is delayed for a predetermined time. The valve body 52 is in a closed state (water stop state).

  Next, as shown in FIG. 9, in the vicinity of the lower end of the throat pipe 42, a switching valve 66 for switching between jet water discharge and tank storage, and a float 68 attached to the switching valve 66 are provided. Since the float 68 moves up and down according to the water level in the water storage tank 5, when the water level is lowered, the float 68 is also lowered, whereby the switching valve 66 blocks the flow passage in the throat pipe 42. ing. In a state where the flow passage in the throat pipe 42 is blocked, the flush water jetted from the jet nozzle 44 collides with the switching valve 66 and flows into the water storage tank 5 without flowing in the throat pipe 42. The water is stored in the tank 5. Further, when the water level is reached and the water storage is completed, the float 68 is also raised, whereby the switching valve 66 opens the flow passage in the throat pipe 42. In a state where the flow passage in the throat pipe 42 is opened, the flush water jetted from the jet nozzle 44 flows in the throat pipe 42 and is supplied to the toilet body 2.

  Furthermore, in the water storage tank 5, a large and small washing switching mechanism 70 for switching the amount of washing water required for the large washing and the small washing is provided. The large and small washing switching mechanism 70 divides the inside 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 the upper side of which is open. And an opening / closing valve 76 attached to the partition wall 72 to open / close the opening 74.

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

  Next, in the water storage tank 5, a makeup water supply pipe 82 is provided to supply makeup water to the toilet body 2 after cleaning the toilet body 2. The lower end 82a of the makeup water supply pipe 82 communicates with the 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. 9, the water level WL in the water storage tank 5 is at the following position. 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 the water level when the small cleaning is completed, and the water level WL3 is The normal water level before or after use of flush toilet 1 is indicated, and the water level WL 4 is immediately after flush water is supplied into storage tank 30 by water supply valve device 38 after large flush or small flush and then water supply is stopped (and flush) It is the water level which shows the water stop state before water supply).

  As shown in FIG. 10, the water supply device 4 provided with the jet pump unit 6 can continuously supply a constant large flow of washing water to the toilet body 2 for a predetermined time. Specifically, for example, the water supply device 4 is configured to continuously supply flush water of an instantaneous flow rate of 85 L / min for 4 seconds to the toilet body 2. The instantaneous flow rate by the water supply device 4 is preferably a large flow rate ranging from about 65 L / min to about 85 L / min, and is preferably supplied continuously for about 3 seconds to about 7 seconds.

Next, the structure of the bowl portion 8 of the toilet body 2 of the flush toilet 1 according to the present embodiment will be described in detail with reference to FIGS. 1, 2, 11 and 12.
As shown in FIG. 1, as described above, the bowl portion 8 of the toilet body 2 is washed slightly to the rear of the left center portion as viewed from the front of the inner peripheral surface 22 of the rim portion 18 of the bowl portion 8 A first rim spout 24 for spouting water is formed, and a second rim spout 26 is formed on the right rear side when viewed from the front. The first rim spout 24 and the second rim spout 26 spout the flush water in the same direction to form a swirling flow.

  As shown in FIGS. 11 and 12, on the inner peripheral surface 22 of the rim portion 18 immediately upstream of the second rim spout 26, a guide portion 90 for guiding the washing water spouted from the first rim spout 24. Is formed. The guide portion 90 includes a guide wall surface 92 formed as a part of the inner circumferential surface 22. In the guide wall surface 92 of the guide portion 90, the direction of the flush water F1 spouted from the first rim spout 24 is substantially the same as the direction of the flush water F2 spouted from the second rim spout 26 (plan view And the parallel direction).

More specifically, the guide wall surface 92 extends from the inner circumferential surface 22 of the rim portion 18 on the upstream side in the front-rear direction of the toilet body 2 (this line A is the center of the toilet body 2 in the front-rear direction With respect to the extending center line, the shape is bent inward at a certain angle α (110 to 140 degrees, preferably 120 degrees).
Further, the guide wall surface 92 is formed in substantially the same direction as the second water flow passage 30 in the vicinity of the second water discharge port 26 (in a direction parallel to the plan view) in plan view.

  The guide wall surface 92 has a shape continuous with the inner peripheral surface 22 (curvature radius R1) of the upstream rim portion 18, and a circular arc portion 92a having a radius of curvature R2 and a straight portion having a straight tip It is formed by 92b. Specifically, the radius of curvature R2 (<R1) of the arc portion 92a is preferably 30 mm to 60 mm, and more preferably 40 mm. The length L of the guide wall surface 92 composed of the arc portion 92a and the straight portion 92b with the radius of curvature R2 is preferably 30 to 80 mm, and more preferably 50 to 60 mm.

The inner peripheral surface 22 of the rim portion 18 in the downstream region (the rear region of the bowl portion 8) of the second water discharge port 26 is formed substantially in the same direction (parallel direction in plan view) with the guide wall surface 92 in plan view. ing.
The bottom 22a (also the upper end region of the dirt receiving surface 16) of the inner peripheral surface 22 of the rim portion 18 in the downstream region of the second outlet 26 (the rear region of the bowl portion 8) The bottom 22a of the inner peripheral surface 22 of the immediately upstream rim portion 18 (which is also the upper end region of the dirt receiving surface 16) is formed as a continuous flat surface (upper end region of the dirt receiving surface 16).

  Next, the operation and effect of the flush toilet 1 according to the embodiment of the present invention described above will be described. First, when the user operates the manual lever 40 of the water supply device 4, wash water supplied from an external water supply source by the water supply valve device 38 reaches the jet nozzle 44, and wash water from the jet nozzle 44 reaches the throat pipe 42. It is jetted toward the suction port 42a. At this time, since the vicinity of the suction port 42a of the throat pipe 412 has a negative pressure, the washing water stored in the water storage tank 5 is also sucked into the throat pipe 42, and the washing water and water storage supplied from the outside by the water supply device 4 The flush water flows together in the tank 5 and flows through the throat pipe 42 to be supplied to the toilet body 1 and the bowl portion 8 starts to be flushed. At this time, as shown in FIG. 10, the washing water of a constant large flow rate is continuously supplied to the toilet body 2 from the water supply device 4 for a predetermined time.

  In the toilet body 1, the first rim spout 24 spouts flush water forward substantially horizontally, and the second rim spout 26 spouts flush water substantially rearward, It is designed to form a swirling flow that turns in the same direction (counterclockwise).

  The flush water spouted forward from the first rim spout 24 flows along the water flow path of the inner peripheral surface 22 of the rim portion 18, passes the front end of the bowl portion 8, and the second rim spout on the opposite side It reaches to the water port 26. On the other hand, the flush water spouted from the second rim spout port 26 similarly flows along the water flow path of the inner peripheral surface 22 of the rim portion 18 and becomes a swirling flow swirling in the same direction.

  At this time, the direction of the flush water F1 spouted from the first rim spout 24 and flowing along the guide wall surface 92 immediately upstream of the second rim spout 26 is the flush water spouted from the second rim spout 26 The direction is almost the same as the direction of F2 (parallel in plan view).

  In the flush toilet 1 according to the embodiment of the present invention described above, the second rim spout is provided even when flush water of a constant large flow rate is continuously supplied to the toilet body 2 by the water supply device 4 for a predetermined time. A guide 90 for guiding the direction of the flush water F1 spouted from the first rim spout 24 is provided on the inner peripheral surface 22 of the rim 18 in the area immediately upstream of the H.26. This guide 90 is the first The direction of the flush water F1 spouted from the rim spout 24 and reaching the second rim spout 26 and the direction of the flush water F2 spouted from the second rim spout 26 are substantially the same direction (parallel in plan view) And so on, the flush water F1 spouted from the first rim spout 24 and reaching the second rim spout 26 and the flush water F2 spouted from the second rim spout 26 are the second rim. The downstream region of the spout 26 (the rear of the bowl portion 8 In-band), it merges smoothly, there is no possibility of collision violently both. As a result, according to the flush toilet 1 according to the present embodiment, it is possible to prevent the occurrence of overflow in the downstream region of the second rim spout 26. Furthermore, the flush water F2 from the first rim spout 24 smoothly merges with the flush water F2 spouted from the second rim spout 26 in the downstream region of the second rim spout 26, and the merged turbulence The bowl portion can be washed with the washing water having a reduced force, and the washing performance can be improved.

  Further, in the flush toilet 1 according to the present embodiment, the guide portion 90 is formed by a part of the inner peripheral surface 22 of the rim portion 18 and is a guide wall surface 92 bent inward at a predetermined angle in plan view. The direction of the flush water F1 spouted from the first rim spout 24 can be smoothly changed by suppressing the disturbance of the flush water.

  Further, since the guide wall surface 92 of the guide portion 90 is formed in substantially the same direction as the second water flow passage 30 near the second water discharge port 26 in plan view, the flush water discharged from the second rim water discharge port 26 Since the direction of F2 is surely defined by the second water flow passage 30 and the guide wall surface 92 of the guide portion 90 is formed in substantially the same direction as the second water flow passage 30, spouting from the second rim spout 26 The flush water F2 and flush water F1 spouted from the first rim spout 24 can be smoothly joined smoothly in the downstream region of the second rim spout 26.

  Further, the inner peripheral surface 22 of the rim portion 18 in the downstream region of the second water discharge port 26 is formed substantially in the same direction (substantially parallel) as the guide wall surface 92 of the guide portion 90 in plan view. Even after the flush water F1 spouted from the first rim spout merges with the flush water F2 spouted from the rim spout 26, it is possible to smoothly flow in a state where disturbance is suppressed.

  Further, the bottom 22 b of the inner peripheral surface 22 of the rim 18 in the downstream region of the second water outlet 26 and the bottom 22 a of the inner peripheral surface 22 of the rim 18 immediately upstream of the second rim water outlet 26 Of the rim portion 18 when the flush water F2 spouted from the second rim spout 26 and the flush water F1 spouted from the first rim spout 24 merge because they are formed as a continuous flat surface. Since the disturbance received from the bottom surface 22b of the inner circumferential surface 22 can be suppressed, the flush water F2 spouted from the second rim spout 26 and the flush water F1 spouted from the first rim spout 24 are used as the second rim. In the downstream region of the spout 26, merging can be performed more smoothly.

  Furthermore, in the flush toilet 1 according to the present embodiment, even if the water supply device 4 is the jet pump unit 6 that continuously supplies flush water with a constant large flow rate to the toilet body for a predetermined time, the second rim spout 26 The cleaning performance can be improved while preventing the overflow in the downstream region of Further, even if water saving is achieved, the toilet bowl cleaning performance becomes good.

DESCRIPTION OF SYMBOLS 1 flush toilet bowl 2 toilet bowl main body 4 water supply apparatus 5 water storage tank 6 jet pump unit 8 bowl part 16 dirt receiving surface 18 rim part 22 inner peripheral surface 22a of rim part bottom part 24 1st rim spout 26 of inner peripheral surface of rim part Second rim spout 28 first water passage 30 second water passage 90 guide portion 92 guide wall surface R2 radius of curvature of arc portion of guide wall surface L length of guide wall surface α bending angle of guide wall surface

Claims (5)

It is a flush toilet bowl that supplies flush water to the toilet bowl body to flush.
A water supply device for continuously supplying a constant large flow of washing water for a predetermined time to the toilet body;
A bowl portion provided with a bowl-shaped filth receiving surface, and a rim portion located at an upper edge and having an inner exposed inner surface;
A first rim spouting portion that spouts flush water along the inner circumferential surface of the rim portion to form a swirling flow;
A second rim spouting portion for spouting wash water in the same direction as the swirling flow formed by the first rim spouting portion along the inner peripheral surface of the rim portion;
A first water flow path for supplying wash water from the water supply device to the first rim water discharger;
And a second water flow path for supplying flush water from the water supply device to the second rim water discharger,
Supply wash water to the bowl from only the first rim spout and second rim spout,
The inner peripheral surface of the rim portion immediately upstream of the second rim spout portion is provided with a guide portion for guiding the direction of the flush water spouted from the first rim spout portion,
The guide portion is composed of a guide wall surface provided with an arc-shaped arc portion formed on the upstream side and a linear portion formed at the tip end portion, and water is discharged from the first rim water discharge portion to generate the second rim water discharge. The linear portion of the guide wall surface is the second water passage so that the direction of the washing water reaching the part and the direction of the washing water discharged from the second rim spouting part become parallel in plan view. The washing water discharged from the second rim water discharger in the downstream region of the second rim water discharger is formed in a direction parallel to the downstream portion in plan view, and the wash water discharged from the first rim water discharger It is adapted to join the,
The water supply apparatus includes a water storage tank for storing washing water, and a jet pump unit disposed so that at least a part of the water storage tank is submerged in the water storage tank .   The inner circumferential surface of the rim portion in the downstream region of the second water discharge portion is formed in a direction parallel to the linear portion of the guide wall surface of the guide portion in plan view. Toilet bowl.   The bottom portion of the inner peripheral surface of the rim portion downstream of the second water discharge portion and the bottom surface of the inner peripheral surface of the rim portion immediately upstream of the second rim water discharge portion are formed as a continuous flat surface The flush toilet according to claim 1 or 2. The flush toilet according to any one of claims 1 to 3, wherein the radius of curvature of the arc portion of the guide wall surface of the guide portion is 30 to 60 mm in plan view. The flush toilet according to any one of claims 1 to 3, wherein a length of a straight portion of a guide wall surface of the guide portion is 30 to 80 mm.

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