WO2017026202A1 - Flush toilet device - Google Patents

Abstract

This flush toilet device is provided with a toilet bowl portion 14, a trap portion 18 which is connected to the bottom of the toilet bowl portion 14 and which determines the water level when accumulated water 44 that has accumulated in the bottom is not being flushed out, and a spout section which has a jet discharge port 28 formed in the bottom and which forms a water stream inside the bottom by discharging flushing water out from the jet discharge port 28, the jet discharge port 28 being formed so as to reach above and below the water level WL1 of the accumulated water 44 when the accumulated water 44 is not being flushed out.

Description

Flush toilet

The present invention relates to a flush toilet.

1. In addition to the rim spout, a jet outlet may be formed in the toilet bowl of the toilet as an opening for discharging the wash water. The rim spout is formed in the rim portion of the toilet bowl, and the entire toilet bowl is washed with the wash water discharged from the rim spout. The jet outlet is formed at the bottom of the toilet bowl, and a water flow for promoting the discharge of filth is formed by the washing water discharged from the jet outlet.

For example, Patent Document 1 includes a jet discharge port formed at a position higher than the highest water level stored in the bottom of the toilet bowl, and a wash water supply path for supplying wash water to the jet discharge port. A toilet bowl is disclosed. In this toilet, a swirl flow swirling around the horizontal axis is formed by the wash water discharged from the jet discharge port. It is described that sewage can be fed into the trap portion by this swirl flow, and sewage can be effectively discharged.

JP 2008-45276 A

As a result of studying the structure of Patent Document 1, the present inventor has recognized the following problems. In the toilet of Patent Document 1, residual water remaining in the cleaning water supply path after toilet cleaning becomes streak-like water (hereinafter referred to as streak-like water), which travels from the jet outlet to the inner surface of the toilet bowl. It will flow down. This streak-like water flows while irregularly changing the path along the inner surface of the toilet bowl, and may flow down over a long period of time, causing a decrease in appearance.

The 1st invention is made in view of such a subject, and the object is to provide the flush toilet which can prevent the fall of the appearance in the toilet bowl part resulting from toilet bowl washing.

2. In the toilet bowl portion of the toilet bowl, a jet discharge hole may be formed in addition to the rim water discharge hole as an opening for discharging wash water. The rim water spouting hole is formed in the rim part of the toilet bowl part, and the entire toilet bowl part is washed with the washing water discharged from the rim water spouting hole. The jet discharge hole is formed at the bottom of the toilet bowl, and a water flow for promoting the discharge of filth is formed by the wash water discharged from the jet discharge hole.

For example, FIG. 1 of Patent Document 1 discloses a toilet in which a rim water passage is formed on the outer peripheral side of the rim portion, and a jet communication passage that branches off from a middle position of the rim water passage is formed. This toilet has a structure in which the cleaning water supplied to the rim water passage is discharged from the rim water discharge hole and discharged from the jet discharge hole through the jet communication passage.

By the way, in the toilet of Patent Document 1, the water inlet of the jet communication passage opens at a midway position along the path from the start side to the end side of the rim water passage. Therefore, the cleaning water in the rim water passage can easily flow toward the rim water discharge hole without changing the flow direction to the jet communication passage. For this reason, there is a problem that it is difficult to take in the cleaning water from the rim water passage to the jet communication passage, and the momentum of the cleaning water discharged from the jet discharge hole is weak.

In order to improve this, as shown in FIG. 5 of Patent Document 1, two right and left rim water passages are formed on the outer peripheral side of the rim portion, one rim water passage is formed with a rim water discharge hole, and the other rim passage is formed. It is also conceivable that the water channel is structured to communicate with the jet communication passage.

Here, in order to increase the degree of freedom of the cleaning mode, a plurality of rim water discharge holes are formed in the rim portion, and the cleaning water supplied to each of the two rim water passages is discharged from separate rim water discharge holes. Sometimes. The toilet of Patent Document 1 has only a single rim water discharge hole formed in the rim portion, and it is not assumed that there are a plurality of such rim water discharge holes. Moreover, the toilet bowl of patent document 1 is not what devised so that a wash water could be spit out vigorously from a jet discharge hole, providing such a some rim water discharge hole.

The second invention is made in view of such a problem, and an object thereof is to provide a flush toilet capable of expelling wash water from the discharge holes while expelling wash water from the rim water discharge holes through the right and left rim water passages. There is to do.

The first aspect of the first invention for solving the above problems is a flush toilet. The flush toilet is a stool part, a trap part that is connected to the bottom part of the stool part and determines the level of non-washed water stored in the bottom part, and a jet outlet formed in the bottom part, A jet water supply channel for supplying cleaning water to the jet discharge port, and a water discharge unit that forms a water flow in the bottom by discharging the wash water from the jet discharge port, The jet discharge port is formed so as to straddle the level of the stored water when not washed. “Non-cleaning” here means when the toilet bowl is in a standby state before starting cleaning.

According to this aspect, the lower part of the jet discharge port is submerged in the stored water at the time of non-cleaning. Therefore, it becomes easy to join the water discharged from the jet outlet after flushing the toilet bowl to the stored water without passing along the inner surface of the toilet bowl. For this reason, after toilet bowl washing | cleaning, the fall of the appearance in the toilet bowl part resulting from toilet bowl washing | cleaning can be prevented by suppressing the flow-down of the streaky water from a jet discharge port to the inner surface of a toilet bowl part.

The first aspect of the second invention for solving the above problem is a flush toilet. The flush toilet is formed on the outer rim portion of the rim portion, the toilet rim portion having the rim portion formed on the upper end portion, the first rim water passage on the left and right sides formed on the outer peripheral side of the rim portion, and the rim portion. The second rim water passage on the left and right sides, the first rim water discharge hole for discharging water from the first rim water passage into the toilet bowl, and the water discharged from the second rim water passage into the toilet bowl. A second rim water discharge hole, a discharge hole formed in a bottom portion of the toilet bowl portion or a drainage passage portion connected to the bottom portion, a communication passage communicating the first rim water passage and the discharge hole The first rim water discharge hole is formed by branching from a middle position of the path from the start end side to the terminal end side of the first rim water passage, and the water inlet of the communication path is the first It opens to the terminal side of the first rim water passage from the rim water discharge hole.

According to this aspect, the wash water that has flowed to the end portion of the first rim water passage has only to change the flow direction from there, and can be easily introduced into the water introduction port in the vicinity thereof by changing the flow direction. Therefore, it becomes easy to take in the washing water from the first rim water passage to the communication passage, and it becomes easy to discharge the high-pressure washing water from the discharge hole. As a result, the cleaning water can be discharged from the discharge holes vigorously while supplying the cleaning water to the right and left rim water passages and discharging the cleaning water from the plurality of rim water discharge holes.

It is a top view of the flush toilet concerning a 1st embodiment. 2 is a cross-sectional view taken along line AA in FIG. FIG. 3 is a sectional view taken along line BB in FIG. FIG. 3 is a cross-sectional view taken along the line CC of the toilet bowl portion of FIG. 2. It is a schematic diagram which shows the flow of the wash water in the water supply channel for jets concerning 1st Embodiment, Fig.5 (a) shows the state before the start of toilet bowl washing | cleaning, FIG.5 (b) shows toilet bowl washing | cleaning. Indicates a midway condition. It is a schematic diagram which shows the flow of the washing water in the jet water supply channel which concerns on a 1st modification, FIG.6 (a) shows the state before the start of toilet bowl washing | cleaning, FIG.6 (b) shows toilet bowl washing | cleaning. An intermediate state is shown, and FIG. 6C shows a further intermediate state. It is a figure which shows typically the gradient formed in the inner bottom face of the rim water passage which concerns on 1st Embodiment. It is a figure which shows how the wash water flows in the toilet bowl part which concerns on 1st Embodiment. It is a schematic diagram which shows the state at the time of the washing water discharged from a rim water discharge port landing before washing water is discharged from a jet discharge port. It is a schematic diagram which shows how to change the water level of the stored water in the toilet bowl part which concerns on 1st Embodiment. It is a top view of the flush toilet concerning a 2nd embodiment. 12 is a cross-sectional view taken along line AA in FIG. FIG. 13 is a sectional view taken along line BB in FIG. 12. It is an enlarged view of the left rim water passage of FIG. It is the DD sectional view taken on the line of FIG. It is the EE sectional view taken on the line of FIG. It is a figure which shows typically the gradient formed in the inner bottom face of each rim water passage which concerns on 2nd Embodiment. FIG. 18A is a view showing the left rim water passage according to the first modified example, and FIG. 18B is an explanatory view concerning the throttle portion. It is explanatory drawing regarding the aperture | diaphragm | squeeze part of FIG. It is a figure which shows the aperture | diaphragm | squeeze part which concerns on a 2nd modification.

Hereinafter, in the embodiment and the modification, the same reference numerals are given to the same components, and the duplicate description is omitted. Moreover, in each drawing, a part of component is abbreviate | omitted suitably for convenience of explanation.

1. A preferred embodiment of the first invention will be described.

FIG. 1 is a plan view of a flush toilet 10 according to the first embodiment.
The flush toilet 10 includes a toilet body 12 made of ceramic. The toilet body 12 is a wall-mounted toilet that is attached in a state of being hung on the side wall surface 100 of the toilet room.

2 is a cross-sectional view taken along line AA in FIG.
As shown in FIG. 1, the toilet main body 12 includes a toilet bowl 14 formed at the front of the toilet main body 12 and a trap 18 connected to the bottom of the toilet bowl 14. The trap portion 18 communicates with the stool portion 14 through an inlet 16 (see also FIG. 1) formed at the bottom of the stool portion 14.

3 is a cross-sectional view taken along line BB in FIG.
As shown in FIGS. 2 and 3, the toilet bowl portion 14 is formed with a bowl-shaped receiving surface portion 20 for receiving filth and a recess recessed downward from the lower edge portion of the receiving surface portion 20, and the toilet bowl portion 14. A recess 22 that forms the bottom, and a rim 24 that is connected to the upper edge of the receiving surface 20 and forms the upper end of the toilet bowl 14 are provided. The receiving surface portion 20 is formed in an elliptical shape whose front and rear dimensions are larger than the left and right dimensions in plan view. The concave portion 22 is formed in a bottomed cylindrical shape, and the inlet 16 of the trap portion 18 opens at the bottom surface portion thereof.

As shown in FIG. 3, the toilet body 12 further includes a water discharge portion 26 for discharging the wash water into the toilet bowl portion 14. The water discharge portion 26 has a jet discharge port 28 formed in the recess 22 of the toilet bowl portion 14 and two rim water discharge ports 30A and 30B formed in the rim portion 24 of the toilet bowl portion 14. The water discharge part 26 forms the water flow for promoting discharge | emission of filth in the recessed part 22 of the toilet bowl part 14 by discharging wash water from the jet discharge port 28. As shown in FIG. Moreover, the water discharge part 26 forms the water flow for wash | cleaning the inner surface of the toilet bowl part 14 by discharging wash water from the two rim water discharge ports 30A and 30B. Although the flush toilet 10 has one of the main features in the water discharge part 26, especially the jet discharge port 28, it demonstrates from a periphery structure first.

As shown in FIG. 2, the trap unit 18 includes a first water channel unit 32, a second water channel unit 34, and a third water channel unit 36 in order from the upstream side to the downstream side. The first water channel portion 32 is formed so as to descend from the inlet 16 of the trap portion 18. The second water channel portion 34 is formed so that the upstream end portion is connected to the downstream end of the first water channel portion 32 in the rear and rises from the upstream end portion. The third water channel portion 36 is formed such that the upstream end portion is connected to the downstream end of the second water channel portion 34 rearward and extends rearward from the upstream end portion. A drain pipe 102 is connected to the downstream end of the third water channel portion 36, and filth is discharged to the sewage side water channel through the trap unit 18 and the inside of the drain tube 102.

Sealed water 38 that blocks the flow of air in the direction of water flow is stored in the trap unit 18 inside the first water channel unit 32 and the second water channel unit 34. Odor reverse flow from the sewage side channel is prevented by the sealing water 38. A bent portion 40 is formed at the boundary portion between the second water channel portion 34 and the third water channel portion 36 to change the water flow direction of water passing through the inside. The upper end edge 42 of the inner wall surface disposed inside the bent portion 40 is an overflow edge (hereinafter referred to as “overflow edge 42”) that determines the water level when the sealing water 38 in the trap portion 18 is not washed. Here, “at the time of non-washing” refers to a time when the toilet bowl 14 is in a standby state before starting washing. When the sealing water 38 in the trap portion 18 exceeds the overflow edge 42, the sealing water 38 in the trap portion 18 overflows from the overflow edge 42 to the downstream side.

A part of the sealing water 38 in the trap part 18 is stored as the stored water 44 at the bottom of the toilet bowl part 14. The water level WL1 when the stored water 44 is not washed (hereinafter referred to as the initial water level WL1) is determined according to the position of the overflow edge 42 in the vertical direction, similar to the sealed water 38.

As shown in FIG. 3, the rim portion 24 has two rims extending from each of the two rim spouts 30 </ b> A and 30 </ b> B to one side in the circumferential direction of the stool portion 14 (counterclockwise direction in this figure). A water conduit 48 is formed. The rim water channel 48 is for guiding the cleaning water discharged from the rim water outlets 30 </ b> A and 30 </ b> B to swivel so that the cleaning water can reach the rim water channel 48 from the start end position to the end position.

In addition to the jet discharge port 28 and the two rim water discharge ports 30A and 30B, the water discharge unit 26 has an inflow port 54, a right rim water passage 56A (first water passage), and a left rim water passage 56B (second water passage). A water supply channel) and a jet water supply channel 58. Details of the jet outlet 28 will be described later, and other configurations will be described first.

The two rim spouts 30A and 30B include a right rim spout 30A (first spout) and a left rim spout 30B (second spout). As shown in FIG. 1, the right rim water spouting port 30 </ b> A is arranged on the right side with respect to the left-right center line CL of the toilet body 12 and at an intermediate position in the front-rear direction of the toilet bowl 14. The left rim spout 30 </ b> B is disposed on the left side with respect to the left-right center line CL of the toilet body 12 and is disposed at the rear of the toilet bowl 14. Here, the left-right center line CL is a straight line extending in the front-rear direction by equally dividing the left-right dimension of the outer surface portion of the toilet body 12. Wash water is spouted from the two rim spouts 30 </ b> A and 30 </ b> B toward one side in the circumferential direction along the inner peripheral surface of the rim portion 24.

As shown in FIG. 2, cleaning water supplied from a water supply pipe 104 a that is a part of the cleaning water supply device 104 flows into the inlet 54. In FIG. 3, the water flow path Wp of the wash water flowing into the water discharge section 26 from the water supply pipe 104a through the inlet 54 is shown.

The right rim water passage 56 </ b> A and the left rim water passage 56 </ b> B are for branching the wash water flowing in from the inflow port 54. The washing water flowing through the right rim water passage 56A is supplied to the right rim water outlet 30A, and the washing water flowing through the left rim water passage 56B is supplied to the left rim water outlet 30B. A branch position 60 that is a branch source of the right rim water passage 56A and the left rim water passage 56B is disposed at the rear and back side of the rim portion.

The right rim water passage 56 </ b> A is formed to extend from the branch position 60 to one side (counterclockwise direction) in the circumferential direction on the back side of the rim portion 24. A right rim water outlet 30A is formed at the downstream end of the right rim water passage 56A.

The left rim water passage 56 </ b> B is formed to extend from the branch position 60 to the other side (clockwise direction) in the circumferential direction on the back side of the rim portion 24. The left rim water passage 56 </ b> B is formed such that the end in the extending direction becomes a dead end. A branch water passage 62 is formed in the middle of the left rim water passage 56B so as to extend to one side in the circumferential direction (counterclockwise direction) and radially inward. A left rim spout 30 </ b> B is formed at the downstream end of the branch water channel 62.

The water supply channel 58 for jets is connected to the tip of the left rim water channel 56B as shown in FIGS. The jet water supply channel 58 is for supplying cleaning water to the jet discharge port 28. An inlet 64 for introducing cleaning water into the jet water supply path 58 is formed on the inner bottom surface of the left rim water passage 56B. The jet water supply path 58 is formed so as to connect the introduction port 64 and the jet discharge port 28. Specifically, the jet water supply channel 58 includes a first portion 58a extending downward from the introduction port 64, and a downstream side of the first portion 58a on the other side in the circumferential direction (clockwise direction in the figure) and downward. And a second portion 58b that extends while being bent. The second portion 58 b extends while bending from the back side of the side portion of the toilet bowl portion 14 to the back side of the jet discharge port 28. The jet water supply path 58 further includes a third portion 58c extending rearward from the downstream end portion of the second portion 58b toward the jet discharge port 28.

The jet discharge port 28 is formed on the wall surface on the left side and the front side of the recess 22 of the toilet bowl 14. From the jet discharge port 28, the wash water is directed toward one side in the circumferential direction (clockwise direction) in the concave portion 22 of the toilet bowl 14, similarly to the discharge direction of the wash water from the two rim water discharge ports 30A, 30B. Is exhaled. Wash water is discharged from the jet outlet 28 along the horizontal direction. Here, “to be along the horizontal direction” includes both the case where the discharge direction of the washing water is parallel to the horizontal plane and the case where it is substantially parallel.

4 is a cross-sectional view taken along the line CC of the toilet bowl portion 14 of FIG.
As shown in FIGS. 2 and 4, the jet discharge port 28 is formed so as to straddle the initial water level WL <b> 1 of the stored water 44. The upper portion of the jet outlet 28 is disposed above the initial water level WL1 of the stored water 44, and the air space in the jet water supply channel 58 and the toilet bowl portion 14 are in communication with each other through the inside. The lower portion of the jet outlet 28 is disposed below the initial water level WL1 of the stored water 44 and is submerged in the stored water 44. Specifically, the lower edge 28a of the jet discharge port 28 is disposed below the initial water level WL1. The lower edge 28a is a part of the jet discharge port 28 that is located vertically below the water passing through the jet discharge port 28.

The effect of the flush toilet 10 will be described.
(1) The jet outlet 28 of the flush toilet 10 is formed so as to straddle the initial water level WL1 of the stored water 44 up and down, and the lower part thereof is submerged in the stored water 44 at the initial water level. Therefore, after cleaning the toilet bowl, water such as make-up water and residual water that has reached the jet outlet 28 through the jet water supply channel 58 can be merged with the stored water 44 without being transmitted along the inner surface of the toilet bowl 14. For this reason, after toilet bowl washing | cleaning, the fall of the appearance in the toilet bowl part 14 resulting from toilet bowl washing | cleaning can be prevented by suppressing the flow of the streak-like water from the jet discharge port 28 to the inner surface of the toilet bowl part 14. FIG. Here, “replenishment water” refers to water that is supplied in order to store the accumulated water 44 again to the initial water level WL1 after the accumulated water 44 is discharged through the trap portion 18 by toilet flushing. “Residual water” refers to water remaining in the rim water passages 56A and 56B and the jet water supply passage 58 after the supply of the cleaning water from the cleaning water supply device 104 is completed.

Also, if streaky water flows down from the jet discharge port 28 to the inner surface of the toilet bowl 14, a part of the streaky water may remain attached to the inner surface of the toilet bowl 14. In this case, depending on the quality of the water adhering to the inner surface of the toilet bowl portion 14, the adhering position may become dirty after the water evaporates. In this respect, according to the present embodiment, since the flow of streaky water from the jet discharge port 28 to the inner surface of the toilet bowl portion 14 can be suppressed, contamination of the inner surface of the toilet bowl portion 14 due to residual streaky water can be suppressed. Moreover, the fall of the appearance in the toilet bowl part 14 resulting from toilet bowl washing | cleaning can be prevented. Moreover, the inside of the toilet bowl part 14 can also be kept clean by suppressing the stain | pollution | contamination of the inner surface of the toilet bowl part 14 by residual streak-like water.

The jet outlet 28 is formed so as to straddle the initial water level WL <b> 1 of the stored water 44, and the atmospheric space between the jet water supply path 58 and the toilet bowl 14 through the inside of the upper part of the jet outlet 28. Will be in communication. This advantage will be described.

FIG. 5 is a schematic diagram showing how the washing water flows in the jet water supply channel 58. FIG. 5A shows a state before the start of toilet cleaning. In this figure, for convenience of explanation, the positions, dimensions, and shapes of the toilet bowl part 14, the trap part 18, the jet water supply channel 58, and the like are different from those in the other figures.

When the cleaning water W is supplied to the left rim water passage 56B, as shown in FIG. 5B, the cleaning water flows into the jet water supply path 58 from the introduction port 64, and the jet water supply path 58 is introduced. The washing water is gradually filled from the mouth 64 side. By the inflow of the cleaning water W into the jet water supply path 58, the air in the jet water supply path 58 is pushed out toward the jet discharge port 28 by the cleaning water W (see direction Pa). At this time, as described above, the atmospheric space in the jet water supply path 58 is in communication with the atmospheric space in the toilet bowl 14 through the inside of the upper portion of the jet discharge port 28. The air is smoothly exhausted through the jet outlet 28 (see direction Pb). If the entire jet discharge port 28 is submerged in the stored water 44, the air in the jet water supply channel 58 is discharged from the jet discharge port 28 in the state of bubbles, so that a bubble burst sound is generated. This may cause discomfort to the user. In this regard, according to the present embodiment, during the toilet bowl cleaning, the discharge of bubbles from the jet discharge port 28 can be prevented, so that the generation of a bubble burst sound can be prevented and the toilet cleaning operation can be made quieter. In addition to this, by preventing the discharge of bubbles from the jet discharge port 28, it is possible to prevent the user from feeling uncomfortable from the viewpoint of appearance.

Next, other features of the flush toilet 10 will be described.
As shown in FIG. 5A, the jet water supply path 58 has an air space 66 that is continuous during non-cleaning in the range from the inlet 64 through which the cleaning water flows from the left rim water passage 56B to the jet outlet 28. Formed to exist. The “atmospheric space 66” here is a space filled with the atmosphere. This means that, in this range, the sealed water that blocks the flow of air in the direction of water flow is not stored in part of the jet water supply path 58. This advantage will be described.

FIG. 6 is a schematic diagram showing how the washing water flows in the jet water supply path 58 according to the modification.
Suppose that a sealed water 68 is formed in the jet water supply path 58 as shown in FIG. In this case, an upstream side air 70 and a downstream side air 72 separated by the sealing water 68 exist in the jet water supply path 58. In this state, when cleaning water flows into the jet water supply channel 58 from the left rim water channel 56B, the upstream air 70 is pushed out in the direction Pc by the cleaning water W together with the sealing water 68, as shown in FIG. . As a result, the sealed water 68 merges with the stored water 44 in the bottom of the toilet bowl 14, and as shown in FIG. 6C, the jet discharge is performed with air remaining in the jet water supply path 58. The accumulated water 44 may rise from the initial water level WL1 until the outlet 28 is submerged (see direction Pd). In this case, there is a possibility that the bursting sound of the bubbles is generated by exhausting the remaining air in the state of bubbles from the jet discharge port 28 (see direction Pe).

On the other hand, according to the above-described configuration, the sealed water 68 in the jet water supply channel 58 is not formed, and an increase in the water level of the stored water 44 due to the sealed water 68 joining with the stored water 44 can be prevented. Therefore, it is possible to prevent a situation in which the entire jet discharge port 28 is submerged and air bubbles are exhausted from the jet discharge port 28 in a state where air remains in the jet water supply channel 58, and it is possible to effectively generate a bubble burst sound. Can be prevented.

In the flush toilet 10 according to the present example as well, the jet discharge port 28 is formed so as to straddle the initial water level WL1 of the accumulated water 44, so that the function and effect described in (1) above can be obtained. .

Next, a device for preventing the flow of streaky water from the rim spout ports 30A and 30B, not the jet discharge port 28, will be described.

FIG. 7 is a diagram schematically showing the gradient formed on the inner bottom surface of each rim water passage 56A, 56B. In this figure, the gradient from the high position to the low position is indicated by an arrow.
The inner bottom surface of each rim water passage 56A, 56B is provided with a gradient that becomes downwardly inclined from the rim water spouting ports 30A, 30B toward the back side. Specifically, the right rim water outlet 30A has a high position on the inner bottom surface of the right rim water passage 56A, and the first gradient in which the branch position 60 side, which is the branching source of the right rim water passage 56A and the left rim water passage 56B, has a low position. 74 is provided. The first gradient 74 is provided so as to be inclined downward from the right rim water spouting port 30A toward the back side.

Also, a second gradient 76 is provided on the inner bottom surface of the left rim water passage 56B so that the aforementioned branching position 60 side is at a high position and the inlet 64 of the jet water supply passage 58 is at a low position. The second gradient 76 is provided so as to be inclined downward from the left rim spout 30B toward the back side. Further, a third slope 78 is provided on the inner bottom surface of the left rim water passage 56B so that the tip position 56Ba that becomes a dead end becomes a high position and the inlet 64 of the jet water supply passage 58 becomes a low position. In addition, the recessed part 80 recessed downward is formed in the branch position 60 of each rim water passage 56A, 56B.

Explain the advantages of the above configuration. Consider a situation in which the supply of cleaning water from the cleaning water supply device 104 is finished and the water level in each rim water passage 56A, 56B has dropped to near the lower edge of each rim spout 30A, 30B. In this situation, water such as residual water and make-up water on the inner bottom surfaces of the rim water passages 56A and 56B is self-weighted in a direction away from the rim water spouting ports 30A and 30B by the first gradient 74 and the second gradient 76. Makes it easier to flow. That is, the water on the inner bottom surface of each rim water passage 56A, 56B becomes difficult to approach the rim water outlets 30A, 30B, and hardly flows into the toilet bowl 14 through each rim water outlet 30A, 30B. Thereby, when the water level in each rim water passage 56A, 56B falls like the above-mentioned situation, it is possible to prevent the streak-like water from flowing down from the rim water spouting ports 30A, 30 to the inner surface of the toilet bowl 14, and the toilet bowl. It is possible to effectively prevent the appearance of the toilet bowl 14 from being deteriorated due to washing.

Further, at least a part of the inlet 64 of the jet water supply channel 58 is disposed at a position lower than the rim water spouting ports 30A and 30B. The introduction port 64 according to the present embodiment is entirely disposed at a position lower than the rim water spouting ports 30A and 30B. From another viewpoint, the introduction port 64 is at least partially disposed at a position lower than the highest position of the inner bottom surface having the first gradient 74 and the second gradient 76. The introduction port 64 according to the present embodiment is entirely disposed at a position lower than the highest position of the inner bottom surface having the first gradient 74 and the second gradient 76. More specifically, the introduction port 64 is disposed below the lowest position of the inner bottom surface having the first gradient 74 and is disposed at the same position as the lowest position of the inner bottom surface having the second gradient 76.

Therefore, in the process of lowering the water level in each rim water passage 56A, 56B, the water on the inner bottom surface of each rim water passage 56A, 56B is introduced into the jet water supply passage 58 by the first gradient 74 and the second gradient 76. It becomes easy to guide to the mouth 64 by its own weight. Therefore, the water on the inner bottom surface of each rim water passage 56A, 56B can be discharged through the jet water supply passage 58, and the amount of water flowing into the toilet bowl 14 through each rim water spouting port 30A, 30B can be easily reduced. As a result, in the process of lowering the water level in each rim water passage 56A, 56B, it is possible to more effectively prevent the streak-like water from flowing down from the respective rim spouts 30A, 30B to the inner surface of the toilet bowl 14, and for toilet cleaning. The resulting deterioration in the appearance of the toilet bowl 14 can be more effectively prevented.

Next, the washing | cleaning method of the toilet bowl part 14 using the above flush toilet 10 is demonstrated using FIG.
The flush toilet 10 wash | cleans the inside of the toilet bowl part 14 with the so-called washing-off type washing | cleaning system which pours the waste in the toilet bowl part 14 in the trap part 18 using the drop of water. By operating the operation members such as a switch and a lever for starting the supply of the cleaning water, the cleaning water within the predetermined flow rate range is supplied from the cleaning water supply device 104 into the water discharge section 26 of the flush toilet 10. Hereinafter, the operation from the start to the end of the supply of cleaning water within a predetermined flow rate range will be described as a single cleaning operation. In the present embodiment, the cleaning water supply device 104 supplies cleaning water by a water supply direct pressure type water supply method using a tap water supply pressure.

The cleaning water supplied from the cleaning water supply device 104 flows into the water discharger 26 from the inlet 54. The washing water that has flowed into the water discharge section 26 flows through the right rim water passage 56A, the left rim water passage 56B, and the jet water supply passage 58 (not shown), while the jet discharge port 28 and each rim water discharge port 30A. , 30B.

The washing water discharged from the jet discharge port 28 forms a swirl flow Dwa that swirls along the one side (counterclockwise direction) in the circumferential direction in the recess 22 of the toilet bowl 14. The swirl flow Dwa cleans the inner surface of the recess 22 and collects filth in the recess 22 at the swivel center.

Each rim spout 30A, 30B swirls in the toilet bowl portion 14 along one side in the circumferential direction by discharging wash water to one side in the circumferential direction along the inner circumferential surface of the rim portion 24. Form. The rim portion 24 and the receiving surface portion 20 of the toilet bowl portion 14 are washed by the swirl flow Dwb. A part of the washing water forming the swirl flow Dwb on the receiving surface portion 20 swirls while moving downward, and forms a flow Dwc from the receiving surface portion 20 through the recess 22 toward the inlet 16 of the trap portion 18. The filth in the concave portion 22 of the toilet bowl portion 14 is swept away through the inlet 16 into the trap portion 18 by this flow Dwc. In particular, since the filth collected at the swirling center is swept away by the swirling flow Dwa, the filth can be effectively discharged.

Here, let us consider how the washing water flows in the jet water supply channel 58. The cleaning water flowing into the jet water supply path 58 flows while pushing the air in the jet water supply path 58 toward the jet discharge port 28 and reaches the jet discharge port 28 as shown in FIG. 5B. Then, it begins to be discharged from the jet discharge port 28. Therefore, as shown in FIG. 9, if the entire jet discharge port 28 is submerged before the cleaning water is discharged from the jet discharge port 28, the air pushed out by the cleaning water is moved into the jet water supply path 58. The remaining state will remain. In this case, the air in the jet water supply path 58 is exhausted in the form of bubbles from the jet discharge port 28 (see direction Pf), and a bursting sound of bubbles is generated in the toilet bowl portion 14. Such a situation may occur when the stored water 44 rises from the initial water level WL1 by the cleaning water discharged from the rim water discharge ports 30A and 30B before the cleaning water is discharged from the jet discharge port 28.

Therefore, the toilet bowl 14 and the water discharger 26 according to the present embodiment is configured so that the wash water discharged from the rim water discharge ports 30 </ b> A and 30 </ b> B reaches the accumulated water 44 after the wash water is discharged from the jet discharge port 28. Configured. From another point of view, the toilet bowl 14 and the water discharger 26 finish pushing out the air in the jet water supply channel 58 through the jet discharge port 28 by the wash water flowing into the jet water supply channel 58 from the introduction port 64. After that, the cleaning water discharged from the rim water discharge ports 30 </ b> A and 30 </ b> B is configured to land on the accumulated water 44. As a result, before the air in the jet water supply path 58 is completely pushed out by the cleaning water, the cleaning water discharged from the rim water spouting ports 30A and 30B reaches the accumulated water 44, and the jet water discharge is caused by the rise in the level of the accumulated water 44. A situation in which the entire outlet 28 is submerged can be prevented. As a result, it is possible to prevent a situation where bubbles are exhausted from the jet discharge port 28 due to the entire jet discharge port 28 being submerged in a state where air remains in the jet water supply channel 58, and the burst sound of the bubble is generated. Can be effectively prevented.

In this way, the water discharge section 26 includes the length of the water flow path from the inflow port 54 to each rim water discharge port 30A, 30B, the length of the water flow path of the jet water supply path 58, each water flow path 56A, The passage cross-sectional areas of 56B and 58 are adjusted. Moreover, since it comprises in this way, as for the toilet bowl part 14, the curvature radius by planar view, the inclination of each site | part, etc. are adjusted. In order to discharge the cleaning water from the jet discharge port 28 at an early stage, the length of the water supply path of the jet water supply path 58 is shortened so that the cleaning water can reach the jet discharge port 28 at an early stage. 58 is adjusted by reducing the cross-sectional area of the passage. In order to delay the timing at which the wash water discharged from the rim spouts 30A and 30B (hereinafter referred to as rim wash water) reaches the accumulated water 44, water flows from the inlet 54 to the rim spouts 30A and 30B. Adjustments are made by increasing the length of the path, increasing the radius of curvature of the toilet bowl 14 in plan view, or making some of the slope gentle.

From another point of view, the toilet bowl 14 and the water discharger 26 are configured so that the entire jet discharge port 28 is submerged after the air in the jet water supply path 58 has been exhausted from the jet discharge port 28. It can be said that it is comprised. This also prevents the entire jet discharge port 28 from being submerged due to a rise in the water level of the stored water 44 before the air in the jet water supply path 58 has been pushed out by the wash water.

In this configuration, before the air in the jet water supply path 58 is exhausted from the jet discharge port 28, the condition that the water level of the accumulated water 44 is not raised until the entire jet discharge port 28 is submerged is satisfied. There is a need. Such a rise in the water level of the accumulated water 44 occurs when the rim cleaning water reaches the accumulated water 44. Therefore, in order to satisfy the above-described conditions, (B) the timing at which the rim cleaning water reaches the pooled water 44 is delayed while the cleaning water is discharged from the jet discharge port 28 at an early stage, as described above. Thus, the water discharge part 26 and the toilet bowl part 14 should just be comprised. The reason for the condition (A) is that if the washing water is discharged from the jet outlet 28 at an early stage, the timing of exhausting the air in the jet water supply path 58 can be advanced accordingly.

In addition, as shown in FIG. 10, at the time of toilet bowl washing | cleaning, the water 44 in the recessed part 22 of the toilet bowl part 14 is the water level from the initial water level WL1 by the wash water discharged from the jet discharge port 28 and the rim water discharge ports 30A and 30B. It rises to WL2 (see also FIGS. 2 and 4). When the water level is WL2, the entire jet discharge port 28 is submerged. The supply amount of the cleaning water supplied from the cleaning water supply device 104 is adjusted so as to achieve such a water level WL2.

The first invention has been described above based on the embodiment, but the embodiment only shows the principle and application of the first invention. In the embodiment, many variations and arrangements can be made without departing from the concept of the first invention defined in the claims.

Although the flush toilet 10 has been described as an example of using the wash-off method as the cleaning method, the inside of the toilet bowl 14 may be cleaned by a cleaning method combined with another method such as a siphon method. Although the flush toilet 10 explained the example which uses a water supply direct pressure system as a water supply system, water supply systems, such as a gravity water supply system using gravity, may be used besides this. Although the toilet body 12 has been described by taking a wall-mounted toilet as an example, it may be a floor-standing toilet installed on the floor surface of a toilet room. The toilet body 12 may be made of resin or the like in addition to pottery.

Although the example in which the inlet 16 of the trap part 18 opens in the bottom part of the bottom part (concave part 22) of the toilet bowl part 14 was demonstrated, you may open in the side part of a bottom part.

Although an example in which the jet discharge port 28 is formed on the wall surface on the left side and the front side of the recess 22 has been described, the position thereof is not limited thereto. Moreover, the water discharge part 26 demonstrates the example comprised so that the swirling flow swirling along the one side of the circumferential direction may be formed in the bottom part of the toilet bowl part 14 by discharging wash water from the jet discharge port 28. did. The water flow formed by the washing water discharged from the jet discharge port 28 is not limited to this, and for example, a water flow passing through the inlet 16 of the trap portion 18 toward the deep side of the trap portion 18 may be formed. In any case, a water flow that promotes the discharge of filth through the trap portion 18 may be formed.

In addition to this, the jet discharge port 28 has an initial water level WL1 of the accumulated water 44 in a range from 1/4 to 3/4 with respect to the vertical dimension La when the vertical dimension of the jet discharge port 28 is La. It may be formed so as to be arranged on the lower side with respect to.

The rim spouts 30 </ b> A and 30 </ b> B have been described as an example of spouts for discharging wash water into the toilet bowl 14. This spout may not be formed in the rim part 24, and may be formed in the warm water washing apparatus mounted on the toilet body 12. Further, the example in which the two rim spouts 30A and 30B are formed in the rim portion 24 has been described, but only one rim spout may be formed in the rim portion 24, or three or more rim spouts may be formed. A water mouth may be formed. Further, the rim water discharge ports 30 </ b> A and 30 </ b> B have been described with respect to the example in which the cleaning water is discharged toward one side in the circumferential direction along the inner peripheral surface of the rim portion 24. The spout formed in the rim part 24 should just be for discharging wash water in the toilet bowl part 14, and the discharge direction of wash water is not restricted to this. For example, the washing water may be discharged downward.

Further, although an example has been described in which the left rim water passage 56B and the right rim water passage 56A are formed on the back side of the rim portion 24, only one of them may be formed.

Also, an example in which the inlet 64 of the jet water supply channel 58 is formed on the inner bottom surface of the left rim water channel 56B has been described. When the inlet 64 is formed on the inner wall surface of the water passage for supplying cleaning water to the water outlet, it may be formed on the inner surface of the left rim water passage 56B, or the inner bottom surface of the right rim water passage 56A. Or you may form in an inner surface.

Generalizing the invention embodied by the above embodiments and modifications leads to the following technical idea.

A flush toilet according to a second aspect of the first invention is the flush toilet according to the first aspect, wherein the stool part and the water discharge part are configured so that the air in the water supply passage for the jet is exhausted from the jet outlet and the jet You may comprise so that the whole discharge outlet may be submerged.
According to this aspect, it is possible to prevent a situation in which the entire jet discharge port is submerged due to a rise in the water level of the stored water before the air in the jet water supply channel has been pushed out by the washing water. As a result, the entire jet discharge port is submerged while air remains in the jet water supply channel, so that it is possible to prevent the bubbles from being exhausted from the jet discharge port, and the generation of bubble burst noise. It can be effectively prevented.

In the flush toilet of the third aspect of the first invention, in the first aspect, the water discharge part has a spout for discharging wash water into the toilet bowl part, and the toilet bowl part and the water discharge part are: After the cleaning water is discharged from the jet discharge port, the cleaning water discharged from the rim water discharge port may land on the stored water.
According to this aspect, before the air in the jet water supply channel is completely pushed out by the cleaning water, the cleaning water discharged from the rim water spouting water reaches the pool water, and the entire jet discharge port is increased by increasing the water level of the pool water. Can be prevented from being submerged. As a result, the entire jet discharge port is submerged while air remains in the jet water supply channel, so that it is possible to prevent the bubbles from being exhausted from the jet discharge port, and the generation of bubble burst noise. It can be effectively prevented.

The flush toilet of the fourth aspect of the first invention is any one of the first to third aspects, wherein the jet water supply channel is in a range from the inlet for introducing the wash water to the jet outlet. Further, it may be formed such that there is a continuous atmospheric space at the time of non-cleaning.
If sealed water that blocks the flow of air in the direction of water flow is formed in the jet water supply channel, if cleaning water flows from the inlet of the jet water supply channel, the air between the inlet and the sealed water Is pushed out together with the sealed water, and the sealed water joins the stored water, so that the stored water rises from the water level at the time of non-washing. Thereby, the air in the jet water supply channel is exhausted in the state of bubbles from the jet discharge port, and there is a possibility that a bursting sound of the bubbles is generated.
According to this aspect, since the sealed water is not formed in the jet water supply channel, it is possible to prevent an increase in the level of the stored water due to the sealed water in the jet water channel joining the stored water. Therefore, the entire jet outlet can be submerged while air remains in the jet water supply channel, preventing bubbles from being exhausted from the jet outlet, and the effect of generating a bursting sound of the bubbles is effective. Can be prevented.

The flush toilet of the fifth aspect of the first invention is the flush toilet according to any one of the first to fourth aspects, wherein the stool part has a rim part that forms an upper end part of the stool part, and the water discharge part Has a rim water outlet formed in the rim portion, and a rim water passage formed on the back side of the rim portion for supplying cleaning water to the rim water outlet. The bottom surface may be provided with a slope that is inclined downward from the rim water spouting port toward the back side.
Consider the situation where the water level in the waterway has dropped to near the lower edge of the rim spout. According to this aspect, in this situation, the water on the inner bottom surface of the rim water passage easily flows due to its own weight in the direction away from the rim water spouting port due to the gradient of the inner bottom surface. That is, it becomes difficult for water on the inner bottom surface of the rim water passage to approach the rim spout and to flow into the toilet bowl through the rim spout. Therefore, when the water level in the rim water passage is lowered as described above, streaky water can be prevented from flowing down from the rim spout to the inner surface of the toilet bowl, and the appearance in the toilet bowl caused by toilet flushing can be prevented. Reduction can be effectively prevented.

A flush toilet according to a sixth aspect of the first invention is the flush toilet according to the fifth aspect, wherein an inlet for introducing the wash water into the jet water supply passage is formed on an inner wall surface of the rim water passage. At least a part may be disposed at a position lower than the water inlet.
According to this aspect, in the process of gradually lowering the water level in the rim water channel, the water on the inner bottom surface of the rim water channel can be easily guided to the inlet of the jet water channel by its own weight due to the gradient. Therefore, the water on the inner bottom surface of the rim water passage can be discharged through the jet water supply passage, and the amount of water flowing into the toilet bowl through the rim spout can be easily reduced. As a result, in the process of lowering the water level in the rim water passage, it is possible to more effectively prevent the streaky water from flowing from the rim spout to the inner surface of the toilet bowl, and to further effectively reduce the appearance due to toilet cleaning. Can be prevented.

2. A preferred embodiment of the second invention will be described.

FIG. 11 is a plan view of a flush toilet 210 according to the second embodiment.
The flush toilet 210 includes a toilet body 212 made of ceramic. The toilet body 212 is a wall-mounted toilet that is attached in a state of being hung on the side wall surface 200 of the toilet room.

12 is a cross-sectional view taken along line AA in FIG.
The toilet bowl 212 includes a toilet bowl 214 formed at the front of the toilet bowl 212 and a drainage passage 216 connected to the bottom of the toilet bowl 214. The drainage passage 216 serves as a passage for waste discharged from the toilet bowl 214 to a sewage water channel (not shown). The drainage passage part 216 includes a trap part 220 in which sealed water 218 for blocking the flow of air in the direction of water flow is stored. A connecting pipe 202 is connected to the downstream end of the trap part 220, and the drainage passage part 216 is connected to the sewage side water channel via the connecting pipe 202.

13 is a cross-sectional view taken along line BB in FIG.
As shown in FIGS. 12 and 13, the toilet bowl 214 is formed at the bottom of the toilet bowl 214 while being recessed downward from the bottom edge of the bowl receiving surface 222 for receiving filth and the receiving surface 222. And a rim portion 226 formed at the upper end of the toilet bowl 214. The receiving surface portion 222 is formed in an elliptical shape whose front and rear dimensions are larger than the left and right dimensions in plan view. An inlet 216 a of the drainage passage 216 is opened at the bottom surface of the recess 224, and a part of the sealed water 218 is stored as the accumulated water 228 in the recess 224.

As shown in FIG. 13, the toilet body 212 includes a water discharge unit 230 for discharging the wash water. The water discharger 230 has two rim water passages 232L and 232R formed on the outer peripheral side of the rim portion 226, and a common water passage 234 for supplying cleaning water to each of the rim water passages 232L and 232R (also FIG. 12). Reference) and two rim water discharge holes 236L and 236R formed in the rim portion 226. The water discharger 230 includes a jet discharge hole 238 formed in the recess 224 of the toilet bowl 214 and a jet communication path 240 for supplying cleaning water to the jet discharge hole 238. Although the flush toilet 210 has one of the main features in the rim water passage 232L, the other features of the water discharger 230 will be described first.

The two rim water passages 232 </ b> L and 232 </ b> R include a left rim water passage 232 </ b> L (first rim water passage) on the left and right sides of the toilet body 212 and a right rim passage on the right and left sides of the toilet body 212. And a water channel 232R (second rim water channel). The left rim water passage 232L is disposed on the left side with respect to the left-right center line CL of the toilet body 212, as shown in FIG. The right rim water passage 232R is arranged on the right side with respect to the left-right center line CL of the toilet body 212. The left-right center line CL is a straight line extending in the front-rear direction by dividing the left-right dimension of the outer surface portion of the toilet body 212 into two equal parts.

13, the rim water passages 232L and 232R are formed by branching left and right from the downstream end of the common water passage 234. A branch position 242 serving as a branch source of each rim water passage 232L, 232R is arranged behind the rim portion 226. As shown in FIG. 12, the common water passage 234 is supplied with cleaning water from a water supply pipe 204 a that is a part of the cleaning water supply device 204.

The left rim water passage 232L is formed to extend from the start end 232a on the branching position 242 side to one side in the circumferential direction (clockwise direction in FIG. 13). The end portion 232b at the end position in the extending direction of the left rim water passage 232L is formed to be a dead end. Details of the left rim water passage 232L will be described later.

The right rim water passage 232R is formed so as to extend from the branch position 242 on the start end side to the other side in the circumferential direction (counterclockwise direction in FIG. 13). A right rim water discharge hole 236R is formed at a terminal portion that is a terminal position in the extending direction of the right rim water passage 232R. Hereinafter, “one end side in the circumferential direction” is referred to as a clockwise direction, and “the other end side in the circumferential direction” is referred to as a counterclockwise direction.

The two rim water discharge holes 236L and 236R include a left rim water discharge hole 236L (first rim water discharge hole) on the left side of the toilet body 212 and a right rim water discharge hole 236R (second rim water discharge hole) on the toilet body 212. included. As shown in FIG. 1, the left rim water discharge hole 236 </ b> L is disposed on the left side of the left-right center line CL of the toilet body 212 and at the rear of the toilet bowl 214. The right rim water discharge hole 236 </ b> R is disposed on the right side with respect to the left-right center line CL of the toilet main body 212 and at an intermediate position in the front-rear direction of the toilet bowl 214.

Return to FIG. The left rim water discharge hole 236L is for discharging water from the left rim water passage 232L into the toilet bowl 214. The right rim water discharge hole 236R is for discharging water into the toilet bowl 214 from the right rim water passage 232R. Wash water is spouted in the counterclockwise direction along the inner peripheral surface of the rim portion 226 from the two rim water discharge holes 236L and 236R. Thereby, a water flow for cleaning the inner surface of the toilet bowl 214, particularly the inner surface of the rim 226 and the receiving surface 222 is formed. This water flow becomes a swirl flow guided so as to swirl counterclockwise in the toilet bowl 214.

The jet discharge hole 238 is formed on the wall surface on the left side and the front side of the recess 224 of the toilet bowl 214. Wash water is spouted from the jet discharge hole 238 toward the accumulated water 228 (see FIG. 12) in the recess 224 of the toilet bowl 214. Specifically, the wash water is spouted in the counterclockwise direction along the inner peripheral surface of the recess 224 toward the water 228 in the recess 224 of the toilet bowl 214. As a result, a counterclockwise swirl flow is formed in the recess 224 of the toilet bowl 214, and the filth in the recess 224 is collected at the swivel center by this swirl flow. The filth is pushed away through the inlet 216a into the drainage passage 216 by the cleaning water flowing into the recess 224 from the receiving surface 222. In this manner, a water flow for promoting the discharge of filth is formed in the accumulated water 228 by the cleaning water discharged from the jet discharge holes 238.

The jet communication path 240 communicates with the left rim water passage 232L and the jet discharge hole 238. The jet communication path 240 includes a first portion 240 a, a second portion 240 b, and a third portion 240 that are sequentially provided from the left rim water passage 232 </ b> L to the jet discharge hole 238. The first portion 240a extends downward and radially inward of the toilet bowl 214 from a water inlet 240d (described later) that opens in the inner wall surface of the left rim water passage 232L. The second portion 240b extends on the outer peripheral side of the toilet bowl 214 while bending in the clockwise direction and downward from the downstream end of the first portion 240a. The third portion 240c extends rearward from the downstream end portion of the second portion 240b toward the jet discharge hole 238.

FIG. 14 is an enlarged view of the left rim water passage 232L of FIG.
The left rim water passage 232L has a shape that extends while bending in an L shape from the start end 232a toward the end end 232b. The wash water supplied from the start end 232a to the left rim water passage 232L is guided to the end portion 232b while changing the flow direction by hitting the inner wall surface of the left rim water passage 232L. As described above, the left rim water passage 232L is formed so that the washing water can be guided from the start side toward the end side.

The left rim water discharge hole 236L is formed by branching from a middle position of the path Pa from the start end side to the end side of the left rim water passage 232L. The left rim water discharge hole 236L is formed so as to extend from the midway position inside the toilet bowl 214 and in the counterclockwise direction.

Water introduction port 240d for introducing cleaning water into jet communication passage 240 opens to the end side of left rim water passage 232L from left rim water discharge hole 236L. Specifically, the water introduction port 240d opens at the inner bottom surface of the end portion 232b of the left rim water passage 232L. The water inlet 240d is disposed on the left side of the toilet body 212 on the front side of the toilet body 212 from the left rim water discharge hole 236L.

The cleaning water supplied from the start end side to the left rim water passage 232L is guided to the left rim water passage 232L, and flows first into the water passage portion on the water introduction port 240d side from the left rim water discharge hole 236L. When the water channel portion on the side of the water introduction port 240d from the left rim water discharge hole 236L begins to be filled with the cleaning water, a part of the cleaning water changes its flow direction on the way from the start side to the end side of the left rim water channel 232L. It flows into the left rim water discharge hole 236L (see direction Pb). Thus, the left rim water discharge hole 236L is formed at a position where the wash water supplied from the start end side of the left rim water passage 232L can flow in by changing the flow direction.

15 is a sectional view taken along the line DD of FIG. 14, and FIG. 16 is a sectional view taken along the line EE of FIG.
In the left rim water passage 232L, as shown in FIGS. 14 to 16, a throttle portion 244 is formed between the left rim water discharge hole 236L and the water introduction port 240d. In FIG. 14, the position of the aperture 244 is indicated by a two-dot chain line.

The throttle portion 244 is formed to throttle the flow of the cleaning water from the start end side to the end side of the left rim water passage 232L. The restricting portion 244 has a wall portion 244a protruding from the inner wall surface of the left rim water passage 232L, and a water passage portion 244b through which the cleaning water can pass. The water passage portion 244b is formed as an opening surrounded by the inner wall surface of the left rim water passage 232L and the wall portion 244a. The throttle portion 244 is formed so that the space in the left rim water passage 232L is expanded after being narrowed from the start end side toward the end end side. The throttling portion 244 starts from a water channel portion 232d on the start end side with respect to the throttling portion 244 of the left rim water passage 232L (hereinafter referred to as a start end side water passage portion 232d), and is located on the terminal side of the throttling portion 244 of the left rim water passage 232L. It has a function of reducing the flow rate of the cleaning water flowing into the H.232e (hereinafter referred to as the end-side water channel portion 232e).

The operation of the flush toilet 210 will be described.
As shown in FIGS. 12 and 13, cleaning water is supplied to the common water passage 234 from the water pipe 204a. When the cleaning water is supplied from the water supply pipe 204a, the cleaning water is branched and supplied from the branch position 242 of the common water passage 234 to the rim water passages 232L and 232R (see direction Wp in FIG. 13). Wash water flowing through the right rim water passage 232R is discharged from the right rim water discharge hole 236R. Part of the wash water flowing through the left rim water passage 232L is discharged from the left rim water discharge hole 236L, and the remaining portion is discharged from the jet discharge hole 238 through the jet communication path 240.

Here, if the left rim water discharge hole 236L is formed in the end portion 232b of the left rim water passage 232L, and the water introduction port 240d of the jet communication passage 240 opens at a midpoint in the path from the start end side to the end end side. think of. In this case, the cleaning water flowing from the start end side in the left rim water passage 232L is easily guided to the left rim water discharge hole 236L of the end portion 232b without changing the flow direction even if the jet communication passage 240 is provided. Therefore, it becomes difficult to take in the washing water from the left rim water passage 232L through the jet communication passage 240, and it becomes difficult to discharge the high-pressure washing water from the jet discharge hole 238.

(A) On the other hand, according to the flush toilet 210 of the present embodiment, the wash water that has flowed to the end portion 232b of the left rim water passage 232L can only change the flow direction from there, and the water inlet 240d in the vicinity thereof. It is easy to be introduced by changing the flow direction. Therefore, it becomes easy to take in the washing water from the left rim water passage 232L to the jet communication path 240, and it becomes easy to discharge high-pressure washing water from the jet discharge hole 238. As a result, the cleaning water can be discharged from the jet discharge holes 238 while supplying the cleaning water to the left and right rim water passages 232L, 232R and discharging the cleaning water from the plurality of rim water discharge holes 236L, 236R.

(B) Further, in the left rim water passage 232L, a narrowed portion 244 is formed between the left rim water discharge hole 236L and the water introduction port 240d. For this reason, a part of the wash water that has flowed to the water channel portion on the start end side from the throttle portion 244 of the left rim water passage 232L passes through the throttle portion 244 and is located on the terminal side from the throttle portion 244 of the left rim water passage 232L. It flows into the channel part. Therefore, the water channel portion that is closer to the start side than the throttle portion 244 of the left rim water passage 232L is more easily filled with the cleaning water earlier than the water channel portion that is closer to the end side than the throttle portion 244. Thereby, the water pressure by the washing water of the water channel part located on the start end side from the throttle part 244 can be increased early, and the high water pressure washing water can be discharged from the water channel part through the left rim water discharge hole 236L at an early stage. As a result, it is possible to lengthen the time for discharging high-pressure washing water from the left rim water discharge hole 236L in one washing operation, and it is easy to increase the toilet cleaning ability and the waste discharging ability.

Originally, in the flush toilet 210 of the present embodiment, the timing of discharging the high-pressure washing water from the left rim water discharge hole 236L is delayed by the amount of the water channel portion on the terminal side of the left rim water passage 232L from the left rim water discharge hole 236L. easy. Even in this case, by forming the throttle portion 244 between the left rim water discharge hole 236L and the water introduction port 240d, the high water pressure wash water is discharged from the jet discharge hole 238 while the high water pressure wash water is discharged to the left rim water discharge hole. There is an advantage that 236L can be discharged early.

In addition to this, the distribution of the cleaning water distributed to the left rim water discharge hole 236L and the jet discharge hole 238 from the start end side of the left rim water passage 232L by adjusting the size of the water flow portion 244d of the throttle portion 244. The amount can be adjusted.

Next, other features of the flush toilet 210 will be described.
Residual water remaining in the rim water passages 232L and 232R becomes streak-like water (hereinafter referred to as streak-like water) and may flow down from the rim water discharge holes 236L and 236R along the inner surface of the toilet bowl 214. is there. This streak-like water flows while irregularly changing the path along the inner surface of the toilet bowl, and may flow down over a long period of time, causing a decrease in appearance. Hereinafter, the point for improving this will be described.

FIG. 17 is a diagram schematically showing the gradient formed on the inner bottom surface of each rim water passage 232L, 232R. In this figure, the gradient from the high position to the low position is indicated by an arrow. The inner bottom surface of each rim water passage 232L, 232R is provided with a slope that becomes downwardly inclined from the rim water discharge holes 236L, 236R toward the back side.

Specifically, on the inner bottom surface of the left rim water passage 232L, the branch position 242 side that is the branching source of each rim water passage 232L, 232R is a high position, and the water introduction port 240d of the jet communication path 240 is a low position. One gradient 250 is provided. The first gradient 250 is provided so as to be inclined downward from the left rim water discharge hole 236L toward the back side. On the inner bottom surface of the right rim water passage 232R, a second slope 252 is provided in which the right rim water discharge hole 236R is at a high position and the branch position 242 side of each rim water passage 232L, 232R is at a low position. The second gradient 252 is provided so as to be inclined downward from the right rim water discharge hole 236R toward the back side. In addition, the recessed part 254 recessed downward is formed in the branch position 242 of each rim water passage 232L, 232R.

Due to the above gradients 252 and 254, the water introduction port 240d of the jet communication path 240 is at least partially disposed at a position lower than the rim water discharge holes 236L and 236R. The entire water inlet 240d according to the present embodiment is disposed at a position lower than the rim water spouting holes 236L and 236R.

Explain the advantages of the above configuration. When the supply of the cleaning water from the cleaning water supply device 204 is completed, the water in the rim water passages 232L and 232R is jetted through the water inlet 240d of the left rim water passage 232L in addition to the rim water discharge holes 236L and 236R. It is discharged from the communication passage 240. Here, a situation is considered in which the water level in each rim water passage 232L, 232R has dropped to near the lower edge of each rim water discharge hole 236L, 236R. In this situation, the residual water remaining on the inner bottom surfaces of the rim water passages 232L and 232R can be discharged from the jet communication passage 240 through the water inlets 240d located lower than the rim water discharge holes 236L and 236R. It becomes easy to reduce the amount of water flowing into the toilet bowl 214 through the rim water discharge holes 236L and 236R. Thereby, when the water level in each rim water passage 232L, 232R falls like the above-mentioned situation, it is possible to prevent the streak-like water from flowing down the inner surface of the toilet bowl 214 from each rim water discharge hole 236L, 236R. It is possible to effectively prevent the appearance of the toilet bowl 214 from being deteriorated due to the cleaning.

In addition, the “residual water” here includes those formed by remaining washing water used for toilet cleaning. In addition to this, there is also included a case in which makeup water supplied to re-store the stored water 228 remains after the stored water 228 is discharged from the trap unit 220 by toilet cleaning.

Further, in the process of lowering the water levels in the rim water passages 232L and 232R, the water on the inner bottom surface of the rim water passages 232L and 232R is supplied to the water in the jet communication passage 240 by the first gradient 250 and the second gradient 252. It becomes easy to guide to the introduction port 240d by its own weight. Therefore, the water on the inner bottom surfaces of the rim water passages 232L and 232R can be discharged through the jet communication passage 240, and the amount of water flowing into the toilet bowl 214 through the rim water discharge holes 236L and 236R can be easily reduced. As a result, in the process of lowering the water level in each rim water passage 232L, 232R, it is possible to more effectively prevent the streak-like water from flowing down the inner surface of the toilet bowl 214 from each rim water discharge hole 236L, 236R. The resulting deterioration in the appearance of the toilet bowl 214 can be more effectively prevented.

Here, as shown in FIG. 15, the water channel portion 236d on the left rim water discharge hole 236L side (start end side) with respect to the throttle portion 244 is referred to as a start end side water channel portion 236d, and the water inlet port 240d is connected to the throttle portion 244. The water channel portion 236e on the side (terminal side) is referred to as a terminal side water channel portion 236e. At this time, the bottom surface 244c of the water flow portion 244b of the throttle portion 244 is such that the inner bottom surface of the start end side water channel portion 236d and the inner bottom surface of the end side water channel portion 236e move from the left rim water discharge hole 236L side to the water introduction port 240d side. Connect them so that they line up smoothly on a downwardly inclined surface. As shown in FIG. 16, the bottom surface 244c is formed in a range extending over the entire width of the left rim water passage 232L in the water passage width direction at the position where the throttle portion 244 is formed. Such a throttle portion 244 has a shape capable of guiding the residual water transmitted on the inner bottom surface of the left rim water passage 232L in the direction Pc from the left rim water discharge hole 236L side to the water introduction port 240d side. .

This makes it easy for residual water to flow from the left rim water discharge hole 236L side to the water introduction port 240d side without stagnation with respect to the throttle portion 244. Therefore, even when the throttle portion 244 is formed in the left rim water passage 232L, the cleaning water can be easily discharged from the rim water passages 232L and 232R through the jet communication passage 240. As a result, the streak-like water can be effectively prevented from flowing down from the rim water discharge holes 236L, 236R to the inner surface of the toilet bowl 214.

From this point of view, the bottom surface 244c of the throttle portion 244 connects the inner bottom surface of the start end side water channel portion 232d and the inner bottom surface of the end side water channel portion 232e horizontally from the start end side toward the end side. It suffices to connect them so that the end side is lower than the start side. In any case, the residual water transmitted on the inner bottom surface of the left rim water passage 232L has a shape capable of conducting water from the left rim water discharge hole 236L side toward the water introduction port 240d.

Further, from the viewpoint of exhibiting such operational effects, the bottom surface 244c of the throttle portion 244 may be formed in a range over a part of the left rim water passage 232L in the water channel width direction at the position where the throttle portion 244 is formed. Good.

Incidentally, as described above, the first bottom surface 250 (see FIG. 17) is provided on the inner bottom surface of the left rim water passage 232L so as to be inclined downward toward the water introduction port 240d of the jet communication passage 240. Therefore, when the water pressure corresponding to the supply water pressure is applied to the cleaning water in the terminal side water channel portion 236e of the left rim water passage 232L, the cleaning water in the terminal side water channel portion 236e is introduced along the first gradient 250. It becomes easy to guide smoothly toward the mouth 240d. As a result, the cleaning water can be more easily taken into the jet communication path 240 from the left rim water passage 232L, and the high water pressure cleaning water can be more easily discharged from the jet discharge hole 238.

Next, other features of the flush toilet 210 will be described.
FIG. 18A is a diagram showing a left rim water passage 232L according to the first modification. In this figure, the left rim water passage 232L is shown from the same viewpoint as FIG. Compared with the example of FIG. 15, the restricting portion 244 of the present example includes a wall portion 244a between the start-side water channel portion 232d and the terminal-side water channel portion 232e so as to block the flow of fluid through these lower regions. Is different in that it is formed. In this flush toilet 210, the above-described effects (A) and (B) can be obtained.

In the case where such a throttle portion 244 is present, the present inventor conducted an experimental study and found that bubbles are easily discharged from the jet discharge hole 238. When air bubbles are discharged from the jet discharge holes 238 as described above, a bursting sound of the air bubbles may be generated or the user may feel uncomfortable from the viewpoint of appearance, which may cause discomfort to the user.

The mechanism of this phenomenon is not clear, but is presumed to be due to the following reasons. As described above, when the cleaning water W is supplied to the left rim water passage 232L, the starting end side water channel portion 232d is filled with the cleaning water W first as shown in FIG. At this time, the air Ar may remain without leaving the terminal-side water channel portion 232e. In this case, air Ar is present on the terminal end side as viewed from the water passage portion 244b of the throttle portion 244. Accordingly, when the cleaning water W flows into the terminal side water channel portion 232e through the water flow portion 244b in this state, the cleaning water W flows into the jet communication path 240 while entraining the air Ar in the terminal side water channel portion 232e. And It is presumed that the entrained air is discharged as bubbles from the jet discharge hole 238.

On the other hand, as shown in FIG. 15, the throttle portion 244 according to the present embodiment blocks the flow of fluid passing through these upper regions between the start-side water channel portion 232 d and the end-side water channel portion 232 e. A wall portion 244a is formed. As shown in FIG. 16, the wall portion 244 a is formed in a range extending over the entire width of the left rim water passage 232 </ b> L in the water passage width direction at the position where the throttle portion 244 is formed.

Explain this advantage. As shown in FIG. 19, a case is considered in which the start end side water channel portion 232d of the left rim water passage 232L is filled with the cleaning water W first, and the air Ar remains in the end side water channel portion 232e. In this case, according to the present embodiment, the cleaning water W is present instead of the air Ar on the end side as viewed from the water passage portion 244b of the throttle portion 244. Therefore, even if the cleaning water W flows into the terminal-side water channel portion 232e through the water flow portion 244b in this state, the air in the terminal-side water channel portion 232e is not easily caught in the cleaning water W, and the jet communication path 240 It becomes difficult for air to flow into. For this reason, even when the throttle portion 244 is formed in the left rim water passage 232L, the discharge of bubbles from the jet discharge hole 238 can be prevented.

In addition, by forming the wall portion 244 of the throttle portion 244 as described above, when the cleaning water is supplied into the left rim water passage 232L, the terminal side water passage of the left rim water passage 232L. Air Ar tends to remain from the portion 232e without escaping outside. Therefore, when the cleaning water W passes through the water flow portion 244b of the throttle portion 244, the air Ar becomes a resistance, so that the cleaning water flowing into the terminal side water channel portion 232e is difficult to spread. As a result, it is possible to prevent a decrease in the water force due to the spreading of the cleaning water in the terminal-side water channel portion 232e, and to easily discharge the cleaning water from the jet discharge hole 238.

As shown in FIG. 16, the wall portion 244a of the throttle portion 244 is located from the inner upper surface of the left rim water passage 232L when the height of the left rim water passage 232L is H0 at the formation position of the throttle portion 244. Is formed such that the height dimension H1 is equal to or greater than ½ of the water channel height H0. The wall portion 244a of the throttle portion 244 may be formed such that the height dimension H1 from the upper inner surface of the left rim water passage 232L is 3/4 or more of the water passage height H0.

As described above, the second invention has been described based on the embodiment, but the embodiment only shows the principle and application of the second invention. In the embodiment, many modifications and changes in arrangement can be made without departing from the spirit of the second invention defined in the claims.

The flush toilet 210 may wash the inside of the toilet bowl 214 by a washing method such as a wash-off type or a siphon type. The flush toilet 210 may use a water supply system such as a direct water pressure system or a gravity water supply system using gravity. The toilet body 212 is described as an example of a wall-mounted toilet, but may be a floor-standing toilet installed on the floor surface of a toilet room. The toilet body 212 may be made of resin or the like in addition to pottery.

Although the left rim water passage 232L and the right rim water passage 232R have been described as being branched from the downstream end of the common water passage 234, they may be formed separately.

Although the example in which the jet discharge hole 238 is formed in the bottom portion of the toilet bowl 214 has been described, it may be formed in the trap portion 220 of the drainage passage portion 216. In this case, the water flowing toward the downstream side of the trap portion 220 is formed in the sealed water 218 by the cleaning water discharged from the jet discharge holes 238, and the discharge of filth is promoted. That is, the jet discharge hole 238 only needs to be formed in the bottom of the toilet bowl 214 or the drainage passage 216. In these cases, a water flow for promoting discharge of filth is formed in the stored water 228 or the sealed water 218.

In the jet communication path 240, the example in which the jet discharge hole 238 communicates with the left rim water passage 232L has been described, but the jet discharge hole 238 and the right rim water passage 232R may communicate with each other. Moreover, although the water introduction port 240d of the communicating path 240 for jets demonstrated the example opened to the termination | terminus part 232b of the left rim water passage 232L, it should just be opened to the terminal side from the rim water discharge hole of the rim water passage. Further, the example in which the water introduction port 240d of the jet communication passage 240 opens on the inner bottom surface of the left rim water passage 232L has been described. The water introduction port 240d only needs to be opened on the inner wall surface of the rim water passage, and may be opened on the inner side surface in addition to the inner bottom surface of the rim water passage.

In the example of FIG. 16, the water flow portion 244 b of the throttle portion 244 has been described as being surrounded by the inner wall surface of the left rim water passage 232 </ b> L and the wall portion 244 a of the throttle portion 244. In addition, as shown in FIG. 20, the water passage portion 244b is formed with a notch 256 in the wall portion 244a of the throttle portion 244, and is surrounded by the notch 256 and the inner wall surface of the left rim water passage 232L. It may be formed. Moreover, the water flow part 244b may be formed in multiple places, as shown in FIG. In addition, the water passage portion 244b may be formed by forming a through hole in the wall portion 244a of the throttle portion 244 and only the through hole of the wall portion 244a.

In the example of FIG. 11, the first rim water discharge hole 36L that discharges the cleaning water supplied to the left rim water passage 232L is arranged on the left side with respect to the left-right center line CL, and the cleaning water supplied to the right rim water passage 232R The second rim water discharge hole 236R to be discharged has been described as being disposed on the right side with respect to the left-right center line CL. In addition, the first rim water discharge hole 236L may be disposed on the right side with respect to the left-right center line CL, and the second rim water discharge hole 236R may be disposed on the left side with respect to the left-right center line CL. In any case, the position of each rim water discharge hole 236L, 236R is not particularly limited. Further, another rim water discharge hole may be formed in the rim portion 226.

FIG. 17 illustrates an example in which the water inlets 240d are arranged at lower positions than the rim water discharge holes 236L and 236R by providing the gradients 250 and 252 on the inner bottom surfaces of the rim water passages 232L and 232R. In addition, the water introduction port 240d is disposed at a lower position than the first rim water discharge hole 236L by providing a step which becomes a step downward from the first rim water discharge hole 236L of the first rim water passage 232L toward the terminal side. May be.

Further, the rim water discharge holes 236L and 236R have been described as examples in which cleaning water is discharged toward one side in the circumferential direction along the inner peripheral surface of the rim portion 226. The spout formed in the rim portion 226 may be any one for discharging the wash water into the toilet bowl 214, and the discharge direction of the wash water is not limited to this. For example, the washing water may be discharged downward.

Although the example in which the jet discharge hole 238 is formed on the wall surface on the left side and the front side of the recess 224 has been described, the position thereof is not limited thereto.

Generalizing the invention embodied by the above embodiments and modifications leads to the following technical idea.

In the flush toilet of the second aspect of the second invention, in the first aspect, in the first rim water passage, the flow of the wash water is restricted between the first rim water discharge hole and the water inlet. A narrowed portion may be formed.
According to this aspect, the water channel portion that is closer to the start side than the throttle portion of the first rim water passage can be more easily filled with the cleaning water earlier than the water channel portion that is closer to the end side than the throttle portion. Therefore, the water pressure due to the cleaning water in the water channel portion on the start end side from the throttle portion can be increased early, and the high water pressure cleaning water can be quickly discharged from the water channel portion through the first rim water discharge hole.

In the flush toilet of the third aspect of the second invention, in the first aspect or the second aspect, at least a part of the water introduction port may be disposed at a position lower than the first rim water spouting hole.
According to this aspect, it becomes easy to discharge the residual water in the first rim water passage through the water introduction port located lower than the first rim water discharge hole, and the amount of water flowing into the toilet bowl through the first rim water discharge hole. It becomes easy to reduce. Thereby, it is possible to prevent the streak-like water from flowing down from the first rim spouting hole to the inner surface of the toilet bowl portion.

A flush toilet according to a fourth aspect of the second aspect of the present invention is the flush toilet according to the second aspect, wherein the water inlet is at least partially disposed at a position lower than the first rim water spouting hole, and the throttle portion is the first rim. The shape which can guide the residual water which transmits on the inner bottom face of a water flow path from the said 1st rim water discharge hole side toward the said water inlet side may be sufficient.
According to this aspect, it becomes easy for residual water in the first rim water passage to flow without stagnation from the first rim water discharge hole side to the water introduction port side with respect to the throttle portion. Therefore, even when the throttle portion is formed in the first rim water passage, the residual water in the first rim water passage can be easily discharged through the communication passage. Thereby, it is possible to effectively prevent the streak-like water from flowing down from the first rim spouting hole to the inner surface of the toilet bowl portion.

A flush toilet according to a fifth aspect of the second invention is the third aspect or the fourth aspect, wherein the inner bottom surface of the first rim water passage is inclined downward from the first rim water discharge hole toward the back side. A gradient may be provided.
According to this aspect, the residual water in the first rim water passage can be easily guided to the water introduction port by its own weight, and the amount of water flowing into the toilet bowl through the first rim water discharge hole can be easily reduced. Thereby, it is possible to effectively prevent the streak-like water from flowing down from the first rim spouting hole to the inner surface of the toilet bowl portion.

A flush toilet according to a sixth aspect of the second invention is the flush toilet according to the second aspect or the fourth aspect, wherein the throttle portion includes a water channel portion on a start side with respect to the throttle portion, and a water channel on a terminal side with respect to the throttle portion. Between the portions, there may be wall portions that block the flow of fluid through these upper regions.
Consider a case where the start side water channel portion is first filled with the wash water and air remains in the upper region of the end side water channel portion. In this case, according to this aspect, not the air but the cleaning water is likely to exist on the end side when viewed from the water passing portion of the throttle portion. Therefore, even if the cleaning water flows into the terminal-side water channel portion through the throttle portion in this state, the air in the terminal-side water channel portion is not easily caught in the cleaning water, and the air does not easily flow into the communication channel. For this reason, even when the throttle portion is formed in the first rim water passage, the discharge of bubbles from the discharge hole can be prevented.

The flush toilet of the seventh aspect of the second invention is the flush toilet according to any one of the first to sixth aspects, wherein the first rim water spouting hole is disposed on one side of the toilet body, and the water inlet is You may arrange | position in the front side of this toilet bowl main body from the said 1st rim water discharge hole in the left-right one side of the said toilet bowl main body.

In addition, it can be said that the above described embodiments and modifications include the inventions described in the following items.
[item]
A toilet bowl with a rim formed at the upper end;
A first rim water passage formed on the outer peripheral side of the rim portion;
A first rim spout for discharging wash water from the first rim water passage into the toilet bowl,
A discharge hole formed in the bottom of the toilet bowl, or a drainage passage connected to the bottom;
A communication passage that communicates the first rim water passage and the discharge hole,
The first rim water discharge hole is formed by branching from a midway position of the path from the start end side to the terminal end side of the first rim water passage,
The water introduction port of the communication passage opens from the first rim water discharge hole to the terminal end side of the first rim water passage,
The flush toilet according to claim 1, wherein a throttle portion for restricting a flow of washing water is formed in the first rim water passage between the first rim water discharge hole and the water introduction port.

DESCRIPTION OF SYMBOLS 10 ... Flush toilet, 14 ... Toilet bowl part, 16 ... Inlet, 18 ... Trap part, 24 ... Rim part, 26 ... Water discharge part, 28 ... Jet discharge port (discharge port), 30A ... Right rim water discharge port (1st Water outlet), 30B ... Left rim water outlet (second water outlet), 44 ... Reserved water, 56A ... Right rim water passage (first water passage), 56B ... Left rim water passage (second water passage), 58 ... Jet water supply path (water supply path), 64 ... inlet, 66 ... atmospheric space, 210 ... flush toilet, 214 ... toilet bowl part, 216 ... drainage passage part, 226 ... rim part, 232L ... left rim water passage (first 1 rim water passage), 232R ... right rim water passage (second rim water passage), 236L ... left rim water outlet (first rim water outlet), 236L ... right rim water outlet (second rim water outlet), 238 ... Jet discharge hole (discharge hole), 240 ... jet communication path (communication path), 240d ... water guide Mouth, 244 ... throttle section, 250 ... gradient, 252 ... gradient.

The present invention relates to a flush toilet.

Claims (13)

1. Toilet bowl,
   A trap portion that is connected to the bottom of the toilet bowl and determines the water level during non-washing of the water stored in the bottom;
   A jet discharge port formed in the bottom portion and a jet water supply channel for supplying cleaning water to the jet discharge port; by discharging the cleaning water from the jet discharge port, a water flow is generated in the bottom portion; A water discharge portion to be formed,
   The flush toilet is characterized in that the jet discharge port is formed so as to straddle the level of the stored water when not washed.
2. The stool section and the water discharge section are configured such that the entire jet discharge port is submerged after the air in the jet water supply channel has been exhausted from the jet discharge port. The flush toilet according to 1.
3. The water discharge unit has a rim water discharge port for discharging wash water into the toilet bowl,
   The toilet bowl portion and the water discharge portion are configured such that the wash water discharged from the rim water discharge port contacts the pooled water after the wash water is discharged from the jet discharge port. The flush toilet according to claim 1.
4. 2. The jet water supply channel is formed so that a continuous atmospheric space exists during non-cleaning in a range from an inlet for introducing cleaning water to the jet outlet. The flush toilet according to any one of 3 above.
5. The toilet bowl part has a rim part forming the upper end part of the toilet bowl part,
   The water discharge portion has a rim water discharge port formed in the rim portion, and a rim water passage formed on the back side of the rim portion for supplying cleaning water to the rim water discharge port,
   The flush toilet according to any one of claims 1 to 4, wherein the inner bottom surface of the rim water passage is provided with a slope that is inclined downward from the rim spout to the back side.
6. The introduction port for introducing cleaning water into the jet water supply passage is formed on an inner wall surface of the rim water passage, and at least a part thereof is disposed at a position lower than the rim water discharge port. Item 6. A flush toilet according to Item 5.
7. A toilet bowl with a rim formed at the upper end;
   A first rim water passage on one of the left and right sides of the toilet body formed on the outer peripheral side of the rim portion;
   A second rim water passage on the other side of the toilet body formed on the outer peripheral side of the rim portion;
   A first rim water discharge hole for discharging water into the toilet bowl from the first rim water passage;
   A second rim water discharge hole for discharging water into the toilet bowl from the second rim water passage;
   A discharge hole formed in the bottom of the toilet bowl, or a drainage passage connected to the bottom;
   A communication passage that communicates the first rim water passage and the discharge hole,
   The first rim water discharge hole is formed by branching from a midway position of the path from the start end side to the terminal end side of the first rim water passage,
   The flush toilet is characterized in that the water introduction port of the communication passage opens from the first rim water discharge hole to the end side of the first rim water passage.
8. 8. The water washing according to claim 7, wherein the first rim water passage is formed with a throttle portion for restricting a flow of washing water between the first rim water discharge hole and the water introduction port. toilet bowl.
9. The flush toilet according to claim 7 or 8, wherein at least a part of the water introduction port is disposed at a position lower than the first rim water discharge hole.
10. The water inlet is at least partially disposed at a position lower than the first rim water spouting hole,
    The throttle part has a shape capable of guiding residual water transmitted on the inner bottom surface of the first rim water passage from the first rim water discharge hole side toward the water introduction port side. 8. A flush toilet according to 8.
11. The flush toilet according to claim 9 or 10, wherein the inner bottom surface of the first rim water passage is provided with a slope that is inclined downward from the first rim water discharge hole toward the back side.
12. The throttle portion has a wall portion that blocks a flow of fluid passing through the upper region between a water channel portion on the start side with respect to the throttle portion and a water channel portion on the terminal side with respect to the throttle portion. The flush toilet according to claim 8 or 10, wherein:
13. The first rim spouting hole is disposed on one of the left and right sides of the toilet body,
    The flushing size according to any one of claims 7 to 12, wherein the water introduction port is arranged on the front side of the toilet body with respect to the first rim spouting hole on one side of the toilet body. Toilet bowl.

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