JP2015124598A - Water closet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water closet capable of supplying wash water of a proper water supply flow rate for washing a toilet bowl to a bowl part, even when a water storage tank generating a nonconforming water supply flow rate is installed in a toilet bowl body.SOLUTION: A water closet 1 of the present invention is constituted of a downward conduit 24a extending downward by connecting a conduit 24 to a drain port of a water storage tank, a bending conduit 24b connected to the downward conduit 24a and a lateral directional conduit 24c connected to the bending conduit 24b and communicating with rim water discharge parts 26 and 28 by extending in the lateral direction. The lateral directional conduit 24c is formed with a diametrical reduction part 24e having the water conduction cross-sectional area smaller than the total cross-sectional area of an outlet of the rim water discharge parts 26 and 28.

Description

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

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 or a substantially vertical shape, and the wash water stored in the water storage tank is discharged in a horizontal direction from the rim water discharge port to form a swirling flow.
This water storage tank adjusts the height position of the wash water stored in each tank according to the specifications of each type of toilet, changes the head to the toilet body, and optimizes the water supply flow rate supplied to the toilet. Has been decided.

JP2013-44178A

  However, when there are toilets with different cleaning methods among many types of toilets, the feed water flow rate required by the toilet body and the feed water flow rate supplied by the tank may not be compatible. In the flush toilet as described in Patent Document 1 described above, when the water supply flow rate required by the toilet body and the water supply flow rate supplied by the tank are not compatible with each other, the stored water level is relatively high. When the water storage tank is applied, since the inner circumference of the rim portion is formed in an overhang shape or a substantially vertical shape, the wash water that swirls the rim portion overflows the rim portion and overflows out of the toilet body. Problems arise. In particular, in the front and rear regions where the radius of curvature is small in the rim portion, and in the region where the rim portion is shifted from the front side to the side, there is a problem that the cleaning water turning around the rim portion tends to overflow. In addition, when a water storage tank with a relatively low water supply flow rate and a low storage water level is applied, the water supply flow rate of the wash water discharged from the rim water discharge unit is reduced, so that the momentum of the wash water turning around the rim unit is reduced. Is weakened, and there is a problem that the inside of the bowl cannot be sufficiently cleaned.

  In order to solve this problem, the pressure loss of the toilet body is adjusted by adjusting the cross-sectional area of the rim water outlet and the water channel to the rim water outlet, the water outlet cross section to the jet water outlet and the water outlet to the jet water outlet. It is possible to do. However, when adjusting the cross-sectional area of the water flow at each location, there is a problem in that the balance is lost due to changes in the distribution ratio of the wash water coming out of each outlet and the flow rate of the wash water, affecting the discharge performance. Will occur. In addition, since there are a plurality of adjustment points for pressure loss, there is a problem that it is difficult to control pressure loss because it is easily affected by variations in dimensions.

  The present invention has been made to solve the above-mentioned problems of the prior art, and is suitable for cleaning a toilet bowl even when a water storage tank that generates an incompatible water supply flow rate is attached to the toilet bowl body. An object of the present invention is to provide a flush toilet that can supply wash water at a feed water flow rate to a bowl portion.

In order to achieve the above object, the present invention is a flush toilet that cleans a toilet and discharges filth, and is installed on the rear upper surface of the toilet body, and opens and closes a drain outlet to the toilet body. A water storage tank, a bowl-shaped filth receiving surface, and a rim portion formed on the upper edge portion so that its inner peripheral surface rises in an overhang shape or in a substantially vertical direction, , A drainage channel connected to the lower part of the bowl part to discharge filth, a rim water discharge part that forms a swirling flow by discharging cleaning water to the inner peripheral surface of the rim part, and a wash stored in the water storage tank A toilet body having a rim water conduit that guides water to the rim water spouting section, and the water conduit is connected to the drainage port of the water storage tank and extends downward, and is connected to the downward water conduit. Bending waterway and the lateral direction connected to this bending waterway It is composed of a lateral water conduit that extends and communicates with the water discharge portion, and the transverse water conduit is formed with a reduced diameter portion having a water flow cross-sectional area that is smaller than the total cross sectional area of the outlet of the rim water discharge portion. Yes.
In the present invention configured as described above, the water supply flow rate required by the toilet body is obtained by providing the reduced diameter portion in the lateral water conduit so that the water flow cross-sectional area of the water conduit becomes smaller as the water supply flow rate of the water storage tank increases. Even when a water storage tank that generates a larger non-conforming water supply flow is attached to the toilet body, it is suitable for toilet flushing without changing the distribution ratio of wash water coming out of each spout and the flow rate of wash water. Washing water with a suitable water supply flow rate can be supplied to the bowl portion.
Therefore, in the toilet bowl in which the inner peripheral surface of the rim portion of the bowl portion is formed in an overhang shape or rises in a substantially vertical direction, the supply flow rate of the wash water discharged from the rim water discharge portion is increased. It is possible to prevent the wash water that swivels around the rim from overflowing outside the toilet.
In addition, even when a water storage tank that generates a non-conforming water flow rate smaller than the water supply flow rate required by the toilet bowl is attached to the toilet body, the distribution ratio of the wash water coming out from each outlet and the flow rate of the wash water must be changed. In addition, it is possible to supply the bowl portion with cleaning water having an appropriate supply flow rate for cleaning the toilet bowl.
Therefore, by reducing the water supply flow rate of the cleaning water discharged from the rim water spouting portion, the momentum of the cleaning water turning around the rim portion is weakened, and it is possible to prevent the inside of the bowl portion from being sufficiently washed.

In the present invention, preferably, the reduced diameter portion is configured to reduce the diameter of the water passage cross-sectional area by positioning the upper surface of the lateral water guide channel on the side connected to the bent water guide channel downward.
In the present invention configured as described above, since the reduced diameter portion is configured by positioning the upper surface of the lateral water conduit on the side connected to the bent water conduit downward, the cleaning that has passed through the curved water conduit When water flows into the lateral water conduit, it is possible to reduce the upper region of the lateral water conduit on the side connected to the bent water conduit, which is a region where stagnation occurs and the cleaning water tends to stay. Therefore, it is possible to supply rectified wash water to the toilet body with a smooth flow of the wash water, and even when a water storage tank that generates a non-conforming water supply flow rate is attached to the toilet body, it is suitable for washing the toilet bowl. Wash water having a feed water flow rate can be supplied to the bowl portion.

In the present invention, preferably, the reduced diameter portion is a flow path extending over a predetermined distance in the flow direction of the washing water from the inlet of the lateral water guide path connected to the bent water guide path, and the length is 10 mm to 100 mm. is there.
In the present invention configured as described above, since the reduced diameter portion is formed with a length of 10 mm to 100 mm from the entrance of the lateral water guide channel, the flow of cleaning water is made smoother and more rectified. Even when a water storage tank that can be supplied to the toilet body and generates a non-conforming water supply flow rate is attached to the toilet body, it is possible to supply cleaning water with an appropriate water supply flow rate for cleaning the toilet bowl to the bowl portion.

In the present invention, preferably, the reduced diameter portion is formed in a flat shape in which the water passage cross-sectional shape in the vertical direction is long in the lateral direction.
In the present invention configured as described above, since the reduced diameter portion is formed in a flat shape that is long in the lateral direction, the flow rate distribution of the cleaning water in the vertical direction can be made uniform, and the flow of the cleaning water can be reduced. Rinsing water with a smoother and more rectified flow can be supplied to the toilet body, and even when a water storage tank is installed on the toilet body that generates a non-conforming water supply flow rate, the water supply flow rate is appropriate for cleaning the toilet bowl. Water can be supplied to the bowl.

In the present invention, preferably, the front side surface of the downward water guide channel is gradually inclined forward in the flow direction of the cleaning water.
In the present invention configured as described above, since the front side surface of the downward water conduit is gradually inclined forward in the flow direction of the cleaning water, the diameter of the cleaning water that has passed through the downward water conduit is reduced. Even when a water storage tank that generates a non-conforming water supply flow rate is attached to the toilet body, it is possible to ensure that the cleaning water has an appropriate water supply flow rate for cleaning the toilet bowl.

In order to achieve the above object, the present invention is a flush toilet that cleans a toilet and discharges filth, and is installed on the rear upper surface of the toilet body, and opens and closes a drain outlet to the toilet body. A water storage tank, a bowl-shaped filth receiving surface, and a rim portion formed on the upper edge portion so that its inner peripheral surface rises in an overhang shape or in a substantially vertical direction, , A drainage channel connected to the lower part of the bowl part to discharge filth, a rim water discharge part that forms a swirling flow by discharging cleaning water to the inner peripheral surface of the rim part, and a wash stored in the water storage tank A toilet body comprising: a rim water conduit that guides water to the rim water spouting portion; a jet water discharging portion that is located below the bowl portion; and a jet water conduit that guides wash water stored in the water storage tank to the jet water discharging portion. , And the waterway is a water storage tank A downward water conduit connected to the drain outlet and extending downward, a bent water conduit connected to the downward water conduit, and a lateral water conduit connected to the bent water conduit and extending in the lateral direction and communicating with the rim water discharge portion and the jet water discharge portion. The reduced diameter part which is comprised and has a water flow cross-sectional area smaller than the total cross-sectional area of the exit of a rim water discharge part and a jet water discharge part is formed in the horizontal direction water conduit.
In the present invention configured as described above, the water supply flow rate required by the toilet body is obtained by providing the reduced diameter portion in the lateral water conduit so that the water flow cross-sectional area of the water conduit becomes smaller as the water supply flow rate of the water storage tank increases. Even when a water storage tank that generates a larger non-conforming water supply flow is attached to the toilet body, it is suitable for toilet flushing without changing the distribution ratio of wash water coming out of each spout and the flow rate of wash water. Washing water with a suitable water supply flow rate can be supplied to the bowl portion.
Therefore, in the toilet bowl in which the inner peripheral surface of the rim portion of the bowl portion is formed in an overhang shape or rises in a substantially vertical direction, the supply flow rate of the wash water discharged from the rim water discharge portion is increased. It is possible to prevent the wash water that swivels around the rim from overflowing outside the toilet.
In addition, even when a water storage tank that generates a non-conforming water flow rate smaller than the water supply flow rate required by the toilet bowl is attached to the toilet body, the distribution ratio of the wash water coming out from each outlet and the flow rate of the wash water must be changed. In addition, it is possible to supply the bowl portion with cleaning water having an appropriate supply flow rate for cleaning the toilet bowl.
Therefore, by reducing the water supply flow rate of the cleaning water discharged from the rim water spouting portion, the momentum of the cleaning water turning around the rim portion is weakened, and it is possible to prevent the inside of the bowl portion from being sufficiently washed.

  According to the flush toilet of the present invention, even when a water storage tank that generates a non-conforming water supply flow rate is attached to the toilet body, wash water with an appropriate water supply flow rate for toilet cleaning is supplied to the bowl portion. Can do.

It is a top view which shows the flush toilet bowl by embodiment of this invention. It is side surface sectional drawing which shows the flush toilet bowl by embodiment of this invention. (A) It is the vertical direction sectional view of the water conduit seen along the AA line of FIG. (B) It is sectional drawing of the perpendicular direction of the water conduit seen along the BB line of FIG. (C) It is a top view of the top view of a tank connection port. (D) It is front sectional drawing of a 1st rim spout. (E) It is front sectional drawing of a 2nd rim spout.

  Next, a flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings. First, the installation state of the flush toilet according to the present embodiment will be described with reference to FIG. FIG. 1 is a plan view showing a flush toilet according to an embodiment of the present invention. As shown in FIG. 1, the code | symbol 1 shows the flush toilet 1 by this embodiment, and this flush toilet 1 uses the drop by the water level rise in the drain trap line mentioned later to wash away waste. This is a flush toilet (wash-down toilet). In the present embodiment, the flush toilet may be another type of toilet (for example, a siphon-type toilet).

  The flush toilet 1 includes a toilet bowl body 2 made of ceramics. A water storage tank (not shown) for storing washing water is attached to the upper rear side of the toilet body 2, and a drain port provided on the bottom surface of the water storage tank is connected to a tank connection port 3 provided in the toilet body 2. It is comprised so that it may communicate with. The drainage port on the bottom of the water storage tank is equipped with a drainage valve that moves up and down according to the user's operation.When the user starts the toilet flushing operation, the drainage valve opens the drainage port, Wash water in the tank is supplied to the toilet body 2 through the tank connection port 3 so that the toilet body 2 is washed.

  Next, referring to FIGS. 1 and 2, the flush toilet 1 according to the present embodiment will be described in detail. FIG. 2 is a side sectional view showing a flush toilet according to an embodiment of the present invention.

  As shown in FIGS. 1 and 2, the toilet body 2 of the flush toilet 1 according to the embodiment of the present invention includes a bowl portion 12 and a drain trap pipe 14 that extends from the bottom portion of the bowl portion 12. The bowl portion 12 includes a filth receiving surface 16 and a rim portion 18 formed on the upper edge of the filth receiving surface 16. The rim portion 18 is formed so that its inner peripheral surface rises in an overhang shape or in a substantially vertical direction. The rim portion 18 is an overhang or substantially vertical rim portion, and is formed so as to rise smoothly upward from the upper edge of the dirt receiving surface 16. Furthermore, the filth receiving surface 16 of the bowl portion 12 includes a bowl-shaped upper filth receiving surface 20 and a recess 22 formed between the upper filth receiving surface 20 and the drain trap pipe 14.

  The drain trap pipe 14 extends obliquely upward from the inlet 14a opened at the bottom of the bowl portion 12, passes through the highest point 14b, extends obliquely downward, reaches the outlet 14c, and reaches the outlet 14c through a drain socket ( (Not shown). The stored water level L of the flush toilet 1 is equal to the height of the highest point 14 b of the drain trap pipe 14.

When the toilet body 2 is viewed from the front, a first rim spout 26 is formed on the inner peripheral side of the central region on the left side of the rim portion 18, and the first rim water conduit 26 d has substantially the same water cross-sectional area. The rim water discharge port 26 is extended, and the cleaning water is supplied to the first rim water discharge port 26. The washing water is discharged forward from the first rim water discharge port 26 to form a swirling flow in the bowl portion 12.
Further, when the toilet body 2 is viewed from the front, a second rim spout 28 is formed on the inner peripheral side of the rear region on the right side of the rim portion 18, and the second rim water conduit 28 d has substantially the same water flow cross-sectional area. Thus, the second rim water spouting port 28 is extended, and the cleaning water is supplied to the second rim water spouting port 28. Wash water is discharged from the second rim spout 28 in the same direction as the swirl flow formed by the wash water discharged from the first rim spout 26 to form a swirl flow in the bowl portion 12 and the bowl portion 12. The rear area is designed to be cleaned.

  A tank connection port 3 connected to a water storage tank (not shown) is formed at the upstream end of the water conduit 24 of the toilet body 2. The water conduit 24 is connected to the drain of the water storage tank and extends downward, a downward water conduit 24 a that extends downward, a bent water conduit 24 b that is connected to the downward water conduit, and a lateral direction that is connected to the bent water conduit 24 b and extends to the first rim. The first rim water outlet 26 and the lateral rim water path 24c communicated with the second rim water outlet 28 through the water conduit 26d and the second rim water conduit 28d.

The laterally directed water channel 24c is formed with a reduced diameter portion 24e in which the diameter of the flowing water channel is reduced in the vicinity of the inlet 24d connected to the bent water channel 24b (a region surrounded by a dotted line in FIGS. 1 and 2). The reduced diameter portion 24e is formed in a flat shape that is long in the lateral direction that is the left-right direction in the cross-sectional shape of water flow. The water flow cross-sectional area (channel cross-sectional area) C1 of the reduced diameter portion 24e is formed to be smaller than the water flow cross-sectional area (channel cross-sectional area) C4 of the tank connection port 3, and the water conduit of the toilet main body It is formed so as to be the smallest among the 24 water cross-sectional areas. Further, the water flow cross-sectional area C1 of the reduced diameter portion 24e is equal to the water flow cross-sectional area C2 of the first rim water conduit 26d and the first rim water outlet 26, and the flow of the second rim water conduit 28d and the second rim water outlet 28. It is made smaller than the sum total with the water cross-sectional area C3. Therefore, the water supply flow rate of the wash water flowing through the toilet body main conduit 24 is determined by the cross-sectional area C1 of the reduced diameter portion 24e.
Moreover, in the case of embodiment mentioned above, the water cross-sectional area C1 of the diameter reduction part 24e is the sum total of the water cross-sectional area C2 of the 1st rim water outlet 26, and the water cross-sectional area C3 of the 2nd rim water outlet 28. However, when the jet outlet and the jet conduit are provided, the cross-sectional area C1 of the reduced diameter portion 24e is larger than the sum of the hydraulic cross-sectional areas of the rim outlet and the jet outlet. It is made smaller. In short, regardless of whether there is one or more outlets to the bowl of the wash water, the cross-sectional area of the reduced-diameter part is the water flow interruption of each outlet and the outlet of the wash water. What is necessary is just to become smaller than the sum total with an area.

Next, the reduced diameter portion 24e formed in the water conduit 24 will be described in detail with reference to FIGS.
FIG. 3A is a vertical cross-sectional view of the water conduit 24 viewed along the line AA in FIG. FIG. 3B is a vertical cross-sectional view of the water conduit 24 viewed along line BB in FIG. FIG. 3C is a plan view of the tank connection port 3 as viewed from above. FIG. 3D is a front sectional view of the first rim spout 26. FIG. 3E is a front sectional view of the second rim water spouting port 28.

The reduced diameter portion 24e is capable of adjusting the non-conforming water supply flow rate from the water storage tank to a substantially constant water supply flow rate suitable for toilet flushing with respect to the wash water passing through itself.
The reduced diameter portion 24e is made of the same material as the toilet body 2, and is formed integrally with the toilet body 2. The reduced diameter portion 24e may be formed of another member such as resin.

The diameter-reduced portion 24e is a flat shape that is long in the lateral direction, which is the left-right direction, and is formed at a predetermined distance in the direction in which the cleaning water flows. The predetermined distance is about 10 mm to about 100 mm, and more preferably about 10 mm to about 50 mm.
The diameter-reduced portion 24e is a flat shape that is long in the lateral direction, which is the horizontal direction, and is formed at a predetermined distance in the direction in which the cleaning water flows, so that the flow velocity distribution in the vertical direction is uniform. The flow of wash water can be made smooth and the flow of wash water rectified can be supplied to the toilet body 2.

The lateral water conduit 24c includes a reduced diameter portion 24e that is directly connected to the bent water conduit 24b and a water passage portion 24f that is connected downstream of the reduced diameter portion 24e.
The reduced diameter portion 24e can increase the pressure loss by forming its own length longer, and can increase the pressure loss by forming its own water flow cross-sectional area smaller. Conversely, the reduced diameter portion 24e can reduce the pressure loss by forming its own length shorter, and can reduce the pressure loss by forming its own water flow cross-sectional area larger. Can do.

The water flow cross-sectional area C <b> 1 of the reduced diameter portion 24 e is formed to be the smallest in the water conduit 24. Specifically, the water passage cross-sectional area C4 of the tank connection portion and the water cross-sectional area C5 of the water passage portion 24f are smaller than each other, and each water flow cross-sectional area of the first rim conduit 26d and the first rim water outlet 26 are formed. Is formed smaller than the total cross-sectional area of the water flow cross-sectional area C2 and the water flow cross-sectional areas C2 of the second rim water outlet 28d.
Since the reduced diameter portion 24e is formed to be the smallest of the water conduit 24, the first rim water conduit 26d, and the second rim water conduit 28d, the pressure loss experienced by the wash water flowing through the water conduit 24 is reduced. If the water flow cross-sectional area of the diameter-reduced portion 24e is adjusted to be the largest at 24e, the flow rate of the cleaning water discharged from the first rim spout port 26 and the second rim spout port 28 may be made appropriate. it can.

Further, the water conduit 24 is connected to the drainage port of the water storage tank and extends downward, a downward water conduit 24a that extends downward, a bent water conduit 24b that is connected to the downward water conduit 24a, and a lateral direction that is connected to the bent water conduit 24b, The first rim water guide channel 24d and the second rim water guide channel 28d are provided with a first rim water outlet 26 and a lateral water channel 24c communicating with the second rim water outlet 28.
The lateral water conduit 24c includes a reduced diameter portion 24e that is directly connected to the bent water conduit 24b and a water passage portion 24f that is connected downstream of the reduced diameter portion 24e.

  Compared to the upper surface of the water flow portion 24f, which is the other part of the lateral water conduit 24c, the entire upper surface of the lateral water conduit 24c that is directly connected to the bent water conduit 24b in the lateral water conduit 24c The reduced diameter portion 24e is configured by being positioned. As a result, when the wash water that has passed through the bent water guide channel 24b flows into the lateral water guide channel 24c, the stagnation occurs and the wash water tends to stay in the region where the wash water tends to stay above the side water guide channel 24c that is connected to the bent water guide channel 24b. The area can be reduced. Therefore, the flushed water can be supplied to the toilet body 2 with a smooth flow of washing water, and even when a water storage tank that generates an incompatible water supply flow rate is attached to the toilet body, Washing water with a suitable water supply flow rate can be supplied to the bowl portion.

  A side surface 24g on the front side of the downstream water conduit 24a upstream of the reduced diameter portion 24e is gradually inclined forward (to the inlet 24d side of the lateral water conduit 24c) in the flow direction of the washing water. Since the front side surface 24g of the downward conduit 24a is gradually inclined forward in the flow direction of the cleaning water, the cleaning water that has passed through the downward conduit 24a can be smoothly guided to the reduced diameter portion 24e. Even when a water storage tank that generates a non-conforming water supply flow rate is attached to the toilet body, it can be ensured that the cleaning water has an appropriate water supply flow rate for cleaning the toilet bowl.

Next, the operation of the flush toilet according to the above-described embodiment of the present invention will be described mainly with reference to FIGS.
When the user operates to start cleaning, the cleaning water in the water storage tank is supplied from the drain port provided on the bottom surface of the water storage tank to the toilet body 2 through the tank connection port 3.
The wash water supplied from the tank connection port 3 flows along the side surface 24g inclined forward toward the lower front side of the downward water guide passage 24a, flows into the reduced diameter portion 24e, receives pressure loss, The feed water flow is reduced.

  Since the upper surface of the lateral water guide passage 24c where the reduced diameter portion 24e is directly connected to the bent water guide passage 24b is positioned downward and the stagnation region is made smaller, the wash water flowing along the downward water guide passage 24a , And flows through the reduced diameter portion 24e while suppressing stagnation. Thereafter, the wash water flowing into the reduced diameter portion 24e is adjusted to the intended range of the predetermined water supply flow rate.

When this wash water flows through the reduced diameter portion 24e and is discharged from the first rim water outlet 26 and the second rim water outlet 28 via the first rim water conduit 24d and the second rim water conduit 28d, It is possible to suppress the washing water discharged from the water discharge port 26 and the second rim water discharge port 28 from overflowing over the overhang or the substantially vertical rim portion 18.
The swirl flow swirled from the first rim spout 26 and the second rim spout 28 and swirling in the bowl portion 12 can satisfactorily clean the filth receiving surface 16 without overflowing beyond the rim portion 18. .

  The wash water discharged from the first rim water discharge port 26 and the second rim water discharge port 28 forms a swirling flow in the bowl portion 12, the filth receiving surface 16 of the bowl portion 12 is washed, and from the drain trap pipe 14. , Discharge filth.

The flush toilet 1 according to the present embodiment described above is a flush toilet that cleans the toilet and discharges filth, and is installed on the upper rear surface of the toilet body 2, and opens and closes the drain port to the toilet body 2. A water storage tank for supplying cleaning water, a bowl-shaped filth receiving surface 16, and a rim portion 18 formed on the upper edge so that its inner peripheral surface rises in an overhang shape or in a substantially vertical direction. A bowl portion 12, a drain passage 14 connected to an inlet 14 a below the bowl portion 12 for discharging filth, and a rim water discharge portion for discharging a wash water to the inner peripheral surface of the rim portion 18 to form a swirling flow. 26 and 28, and a toilet body 2 having rim water conduits 26d and 28d for guiding the wash water stored in the water storage tank to the rim water discharge sections 26 and 28. The water conduit 24 is a water storage tank. Connect with the drain outlet of the bottom A downward water conduit 24a extending to the bent water conduit 24b connected to the downward water conduit 24a, and a lateral water conduit 24c connected to the bent water conduit 24b extending in the lateral direction and communicating with the rim water spouting portions 26, 28. A reduced diameter portion 24e having a water cross-sectional area smaller than the total cross-sectional area of the outlets of the rim water discharge portions 26 and 28 is formed in the lateral water guide passage 24c.
The reduced diameter portion is provided in the lateral water conduit 24c so that the water flow cross-sectional area of the water conduit becomes smaller as the water supply flow rate of the water storage tank is larger, thereby generating a non-conforming water flow rate larger than the water flow rate required by the toilet body 2. Even when the water storage tank is attached to the toilet body, the bowl water is supplied with the appropriate water supply flow rate for toilet flushing without changing the distribution ratio of the wash water coming out of each spout and the flow rate of the wash water. 12 can be supplied. Therefore, in the toilet bowl in which the inner peripheral surface of the rim portion 18 of the bowl portion 12 is formed to rise in an overhang shape or in a substantially vertical direction, the water supply flow rate of the wash water discharged from the rim water discharge portions 26 and 28 is increased. Accordingly, it is possible to prevent the washing water turning around the rim portion 18 from overflowing the toilet 1 beyond the rim portion 18.
Even when a water storage tank that generates a non-conforming water supply flow rate smaller than the water supply flow rate required by the toilet body 2 is attached to the toilet body 2, the distribution ratio of the wash water and the wash water coming out of the water outlets 26 and 28 Without changing the flow rate, it is possible to supply the bowl portion 12 with cleaning water having an appropriate supply flow rate for toilet cleaning. Therefore, the flow rate of the cleaning water discharged from the rim water discharge portions 26 and 28 is reduced, so that the momentum of the cleaning water turning around the rim portion 18 is weakened and the inside of the bowl portion 12 cannot be sufficiently cleaned. Can be prevented.

Moreover, in the flush toilet 1 by this embodiment mentioned above, it is comprised so that a water flow cross-sectional area may be diameter-reduced by positioning the upper surface of the horizontal waterway 24c of the side connected with the bending waterway 24b below. Yes. Since the reduced diameter portion 24 is formed by positioning the upper surface of the lateral water guide passage 24c on the side connected to the bent water guide passage 24b downward, the wash water that has passed through the bent water guide passage 24b enters the lateral water guide passage 24c. When flowing in, it is possible to reduce the upper region of the lateral water guide channel 24c on the side connected to the bent water guide channel 24b, which is a region where stagnation occurs and the cleaning water tends to stay. Therefore, the wash water having a smoothed flow can be supplied to the toilet body 2 with a smooth flow of the wash water, and even when a water storage tank that generates a different water supply flow rate is attached to the toilet body 2, Wash water with an appropriate feed water flow rate can be supplied to the bowl portion 12.

  In the flush toilet 1 according to the above-described embodiment, the reduced diameter portion 24e is a flow path extending over a predetermined distance in the flow direction of the wash water from the inlet 24d of the lateral water guide path 24c connected to the bent water guide path 24b. The length is 10 mm to 100 mm. In the present invention configured as described above, since the reduced diameter portion 24e is formed with a length of 10 mm to 100 mm from the inlet of the lateral water guide channel 24c, the flow of the cleaning water is made smoother and the flow is rectified. Water can be supplied to the toilet body 2, and even when a water storage tank that generates a non-conforming water supply flow rate is attached to the toilet body 2, cleaning water with an appropriate supply flow rate for toilet cleaning is supplied to the bowl portion 12. be able to.

  In the flush toilet 1 according to the above-described embodiment, the reduced diameter portion 24e is formed in a flat shape in which the vertical water passage cross-sectional shape is long in the lateral direction. Since the reduced diameter portion 24e is formed in a flat shape that is long in the horizontal direction, the flow rate distribution of the cleaning water in the vertical direction can be made uniform, and the flow of the cleaning water can be made smoother and more rectified. Water can be supplied to the toilet body 2, and even when a water storage tank that generates a non-conforming water supply flow rate is attached to the toilet body 2, cleaning water with an appropriate supply flow rate for toilet cleaning is supplied to the bowl portion 12. be able to.

  In the flush toilet 1 according to this embodiment described above, the side surface 24g on the front side of the downward water guide channel 24a is gradually inclined forward in the flow direction of the wash water. Since the front side surface 24g of the downward conduit 24a is gradually inclined forward in the flow direction of the cleaning water, the cleaning water that has passed through the downward conduit 24a can be smoothly guided to the reduced diameter portion 24e. Even when a water storage tank that generates a non-conforming water supply flow rate is attached to the toilet body 2, it can be ensured that the cleaning water has an appropriate water supply flow rate for cleaning the toilet bowl.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Toilet body 3 Tank connection port 12 Bowl part 14 Drain trap pipe 16 Soil receiving surface 18 Rim part 24 Water guide passage 24a Downward water guide passage 24b Bend water guide passage 24c Lateral water guide passage 24d Sideways water inlet 24e Reduced diameter Portion 24f Water-passing portion 24g Side surface 26 on the front side of the downward water conduit 26 First rim water discharge portion 26d First rim water discharge passage 28 Second rim water discharge portion 28d

Claims (6)

A flush toilet that flushes toilets and discharges filth,
A water storage tank that is installed on the rear upper surface of the toilet bowl body and supplies cleaning water to the toilet bowl body by opening and closing a drain;
A bowl portion having a bowl-shaped filth receiving surface, a rim portion formed on the upper edge portion so that an inner peripheral surface thereof rises in an overhang shape or a substantially vertical direction, and below the bowl portion A drainage channel to which the inlet is connected and discharges filth, a rim water spouting part that spouts wash water on the inner peripheral surface of the rim part to form a swirling flow, and the wash water stored in the water storage tank A toilet body with a rim water guide channel leading to a section,
The water conduit is connected to a drain outlet of the water storage tank and extends downward, a bent water conduit connected to the downward water conduit, and a lateral connection connected to the bent water conduit and communicated with the rim water spouting portion. It consists of a horizontal headway that
A flush toilet having a reduced diameter portion having a water cross-sectional area smaller than the total cross-sectional area of the outlet of the rim water spouting portion is formed in the lateral waterway.   The said diameter-reduced part is comprised so that a water-flow cross-sectional area may be diameter-reduced by positioning the upper surface of the said horizontal direction water guide channel in the side connected with the said bent water guide channel below. The flush toilet described.   The reduced diameter portion is a flow path extending over a predetermined distance in the flow direction of the washing water from the inlet of the lateral water guide path connected to the bent water guide path, and the length is 10 mm to 100 mm. The flush toilet according to claim 2.   The flush toilet according to claim 2 or 3, wherein the reduced diameter portion is formed in a flat shape in which a vertical water passage cross-sectional shape is long in a lateral direction.   The flush toilet according to claim 4, wherein a side surface on the front side of the downward water conduit is gradually inclined forward in the flow direction of the washing water. A flush toilet that flushes toilets and discharges filth,
A water storage tank that is installed on the rear upper surface of the toilet bowl body and supplies cleaning water to the toilet bowl body by opening and closing a drain;
A bowl portion having a bowl-shaped filth receiving surface, a rim portion formed on the upper edge portion so that an inner peripheral surface thereof rises in an overhang shape or a substantially vertical direction, and below the bowl portion A drainage channel to which the inlet is connected and discharges filth, a rim water spouting part that spouts wash water on the inner peripheral surface of the rim part to form a swirling flow, and the wash water stored in the water storage tank A toilet main body comprising: a rim water conduit that leads to a portion; a jet water discharge portion that is located below the bowl portion; and a jet water guide that guides wash water stored in the water storage tank to the jet water discharge portion. Have
The water conduit is connected to a drain outlet of the water storage tank and extends downward, a bent water conduit connected to the downward water conduit, the rim water spouting section and the rim water discharge portion extending in the lateral direction connected to the bent water conduit It consists of a lateral waterway that communicates with the jet water discharge part,
A flush toilet having a reduced diameter portion having a water passage cross-sectional area smaller than a total cross-sectional area of the outlet of the rim water discharge portion and the jet water discharge portion.

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