JP2017166315A - Flush type toilet bowl - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flush toilet capable of suppressing drip of residual water from a rim spout after cleaning of a bowl portion with washing water discharged from a rim spout. SOLUTION: The present invention is provided in a bowl portion having a bowl-shaped filth receiving surface and a rim portion formed on an upper edge portion of the filth receiving surface, and is provided in the rim portion and cleaned in the bowl portion. A rim spouting portion that spouts water to form a swirling flow by the washing water, a headrace that guides the washing water to the rim water flow start region located on the rear side of the filth receiving surface, and a headrace that is connected to the headrace. A rim water passage for guiding wash water from the rim water flow start region to the rim water discharge portion, a drainage channel connected below the bowl portion, and a drainage flow path from the headrace to the drainage channel. It is a water-washable stool that is characterized by being equipped. [Selection diagram] Fig. 2

Description

  The present invention relates to a flush toilet bowl, and more particularly to a flush toilet bowl that flushes toilet bodies with flush water supplied from a flush water source and discharges filth.

  Conventionally, for example, as described in Patent Document 1, wash water is discharged from only two rim water discharge ports of the rim, ie, the first water discharge port and the second water discharge port, and swirls on the filth receiving surface of the bowl portion. It is known for flush toilets supplied in a stream. In this flush toilet, the swirling wash water that flows out from the first water outlet of the rim turns into a bundle-like flow toward the reservoir portion by the guide surface provided in the rear region of the bowl portion, and flows into the drainage channel. , Siphon action is generated and filth is discharged.

  Further, a flush toilet in which the flush toilet in Patent Document 1 is improved so that the floating filth in the bowl portion is stirred vertically in the stored water and efficiently discharged into the drainage channel is disclosed in Patent Document 2. Has been.

JP 2014-37723 A JP-A-2015-196960

  The inventor of the present invention, for a conventional flush toilet, after the cleaning of the bowl portion by the wash water discharged from the rim spout is finished, the remaining water is instilled from the rim spout and the water discharge (washing) is not finished. It has been found that there is a possibility that it may be misunderstood, that the appearance is not good, and that there is a concern that the drip of the bowl may be caused by drip of the remaining water.

  Accordingly, an object of the present invention is to provide a flush toilet that can suppress residual water from being instilled from the rim spout after the cleaning of the bowl portion by the wash water discharged from the rim spout is completed. It is.

  The present invention provides a bowl portion having a bowl-shaped filth receiving surface and a rim portion formed on an upper edge portion of the filth receiving surface, and provided in the rim portion, for discharging cleaning water into the bowl portion. A rim water spouting part that forms a swirling flow by the wash water, a water guide channel that guides the wash water to a rim water flow start region located on the rear side of the waste receiving surface, and the rim water feed connected to the water guide channel A rim water passage that guides cleaning water from a start region to the rim water spouting portion, a drain passage connected below the bowl portion, and a drain passage that extends from the water conduit to the drain passage. This is a flush toilet.

  According to the present invention, the remaining water in the conduit is drained directly to the drainage channel via the drainage channel. Thereby, after the cleaning of the bowl portion by the cleaning water discharged from the rim water spouting port is finished, it is possible to effectively suppress the remaining water from being drip from the rim water spouting port.

  Moreover, since the water conduit in the present invention is for guiding cleaning water to the rim water passage start region located on the rear side of the filth receiving surface, the water conduit (for example, the rim water passage start region) to the drain channel. As a result, the length of the drainage channel that reaches can be shortened. Thereby, an effective draining action can be expected.

  Preferably, the height of the bottom surface of the water conduit is lowered toward the inlet opening of the drainage channel. In this case, since the residual water in the water conduit is effectively guided toward the inlet opening of the drainage channel, it is possible to more effectively suppress the residual water in the water conduit from being drip from the rim spout. it can.

  Moreover, it is preferable that the water conduit has a recess, and the inlet opening of the drainage channel is provided in the recess. In this case, when residual water is collected in the concave portion, a water head pressure according to the water level acts, so that a more effective draining action can be expected.

  Preferably, the bottom surface of the rim water passage has a lower height position toward the inlet opening of the water conduit or the drainage channel. In this case, since the remaining water of the rim water channel is effectively guided toward the inlet opening of the water guide channel or the drainage channel, it is more effective that the remaining water of the rim water channel is instilled from the rim water outlet. Can be suppressed.

  The outlet opening of the drainage channel is opened, for example, at the lowest position on the upper surface side of the drainage channel. In this case, it is most effective against the concern that the sealing water level is lowered and the odor is increased through the drainage channel.

  Alternatively, the outlet opening of the drainage channel is opened on the rear side of the lowermost position on the upper surface side of the drainage channel, and the direction in which the drainage channel extends in the vicinity region of the outlet opening is toward the outlet opening. It is facing backwards. In this case, since the washing water passing through the drainage flow channel acts to push the sealed water toward the rear side (discharge side), the sewage, in particular, floats against the power of water. It is effective for discharging fine floating waste. Hereinafter, this mode is referred to as “weak siphon”.

  Alternatively, the outlet opening of the drainage channel is opened in front of the lowermost position on the upper surface side of the drainage channel, and the direction in which the drainage channel extends in the vicinity region of the outlet opening is toward the outlet opening. It is facing backwards. In this case as well, the washing water that passes through the drainage channel acts to push the sealed water toward the rear side (discharge side), so that the comparison is made against dirt, especially against the momentum of the water. It is effective for discharging fine floating waste (weak siphon).

  Further, the drainage channel preferably has a trap channel. The trap channel here is a channel having a channel part extending upward again after a channel part extending downward, and is a configuration widely used in drainage channels.

  In the case where the drainage channel has a trap channel, the remaining water from the drainage channel to the drainage channel even if the sealed water surface is lowered with respect to the outlet opening of the drainage channel. The residual water that flows into the drainage flow channel after the discharge of water has stopped, so-called sealed water accumulates, the odor rises through the drainage flow channel, and sanitary pests may invade. It is suppressed.

  When the drainage channel has a trap channel, the outlet opening of the drainage channel can be positioned above the designed sealing water surface.

  In addition, the water conduit has a guide portion that projects from the bottom surface of the water conduit on the upstream side from the inlet opening of the drainage channel and guides wash water from the upstream side toward the inlet opening of the drain channel to the rim conduit. Is preferred. According to this configuration, since cleaning water from the upstream side toward the inlet opening of the drainage channel can be guided to the rim water passage, a sufficient amount of cleaning water is discharged from the rim spout during the bowl portion cleaning. can do.

As described above, since a sufficient amount of cleaning water should be discharged from the rim spout during cleaning of the bowl portion, it is better that the amount of cleaning water drained from the drainage channel is small. Therefore, the smaller the cross-sectional area of the inlet opening of the drainage channel is better. Specifically, when sufficient only drainage feature of the residual water is preferably the cross-sectional area of the inlet opening of the drainage channel is 7 mm ² to 20 mm ² approximately, when to expect the weak siphon action, draining it is preferred cross-sectional area of the flow path of the inlet opening is 78mm ² ~314mm ² about. Further, when the sectional area of the inlet opening of the drainage channel is small as described above, it is preferable that the sectional area of the vicinity of the inlet opening of the drainage channel is larger than the sectional area of the inlet opening of the drainage channel. This configuration is effective in suppressing the surface tension from acting and residual water from flowing into the inlet opening of the drainage channel.

  It is preferable that at least a part of the drainage channel is a part of the mud channel formed to discharge the slurry outside. That is, it is preferable to divert a part of the mud flow passage formed in the manufacturing process of the flush toilet generally manufactured as a pottery as at least a part of the drainage flow passage.

  According to the present invention, the remaining water in the conduit is drained directly to the drainage channel via the drainage channel. Thereby, after the cleaning of the bowl portion by the cleaning water discharged from the rim water spouting port is finished, it is possible to effectively suppress the remaining water from being drip from the rim water spouting port.

It is a top view (figure which looked at a flush toilet bowl from the top) which shows a situation of a flow of washing water of a flush toilet bowl by a 1st embodiment of the present invention. The rear side of the flush toilet is the left side of FIG. 1, the front side of the flush toilet is the right side of FIG. 1, and the left side of the flush toilet is the lower side of FIG. The right side of the flush toilet is the upper side of FIG. It is sectional drawing in the left-right direction center of the flush toilet bowl by 1st Embodiment of this invention. The rear side of the flush toilet is the left side of FIG. 2, the front side of the flush toilet is the right side of FIG. 2, and the upper side of the flush toilet is the upper side of FIG. The lower side of the toilet is the lower side of FIG. It is sectional drawing in the center of the left-right direction of the flush toilet bowl by 2nd Embodiment of this invention. The rear side of the flush toilet is the left side of FIG. 3, the front side of the flush toilet is the right side of FIG. 3, and the upper side of the flush toilet is the upper side of FIG. The lower side of the toilet is the lower side of FIG. It is sectional drawing in the center of the left-right direction of the flush toilet bowl by 3rd Embodiment of this invention. The rear side of the flush toilet is the left side of FIG. 4, the front side of the flush toilet is the right side of FIG. 4, and the upper side of the flush toilet is the upper side of FIG. The lower side of the toilet is the lower side of FIG. It is sectional drawing in the center of the left-right direction of the flush toilet bowl by 4th Embodiment of this invention. The rear side of the flush toilet is the left side of FIG. 5, the front side of the flush toilet is the right side of FIG. 5, and the upper side of the flush toilet is the upper side of FIG. The lower side of the toilet is the lower side of FIG. It is sectional drawing in the center of the left-right direction of the flush toilet bowl by 5th Embodiment of this invention. The rear side of the flush toilet is the left side of FIG. 6, the front side of the flush toilet is the right side of FIG. 6, and the upper side of the flush toilet is the upper side of FIG. The lower side of the toilet is the lower side of FIG. It is a top view (figure which looked at a flush toilet bowl from the top) which shows a situation of a flow of washing water of a flush toilet bowl by a 6th embodiment of the present invention. The rear side of the flush toilet is the left side of FIG. 7, the front side of the flush toilet is the right side of FIG. 7, and the left side of the flush toilet is the lower side of FIG. The right side of the flush toilet is the upper side of FIG. It is sectional drawing in the center of the left-right direction of the flush toilet bowl by 6th Embodiment of this invention. The rear side of the flush toilet is the left side of FIG. 8, the front side of the flush toilet is the right side of FIG. 8, and the upper side of the flush toilet is the upper side of FIG. The lower side of the toilet is the lower side of FIG. It is an enlarged plan view of the guide part of FIG. It is an enlarged plan view which shows the modification of the form of a guide part. It is an enlarged plan view which shows another modification of the form of a guide part.

Next, a flush toilet according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, the configuration of the flush toilet according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a plan view showing a flow of washing water in a flush toilet according to the first embodiment of the present invention, and FIG. 2 is a horizontal center of the flush toilet according to the first embodiment of the present invention. FIG.

  As shown in FIGS. 1 and 2, the flush toilet 1 according to the first embodiment of the present invention is a flush toilet that flushes filth by flowing water due to a drop of water in the bowl portion 8. It has. Washing water is introduced into the toilet body 2 via a water storage tank (not shown) as a washing water source. The toilet body 2 is made of earthenware with a glaze layer formed on the surface, a skirt portion 6 is formed at the lower portion, and a bowl portion 8 is formed at the upper front. In addition, a water conduit 10 connected to the drain outlet of the water storage tank is formed behind the bowl portion 8, and a drain passage 12 for discharging filth is formed in the lower rear portion of the bowl portion 8.

  However, the present invention is not limited to a flush toilet using a water storage tank as a wash water source, but a flush toilet that supplies a wash water using a water storage tank using a jet pump mechanism as a wash water source or a direct wash water is used. The present invention can also be applied to supplied direct pressure water supply type and pump water supply type flush toilets.

  The bowl portion 8 includes a bowl-shaped filth receiving surface 16, a rim portion 18 formed on the upper edge of the filth receiving surface 16, and a recess 20 formed below the filth receiving surface 16. Here, as shown in FIG. 2, the inner peripheral surface 18 a of the rim portion 18 of the present embodiment has an overhanging shape toward the inside, and swirling cleaning water (details will be described later) to the outside. It is designed not to jump out.

  As shown in FIG. 1, a first rim water discharge port 22 (rim water discharge portion) that discharges cleaning water is formed on the rear side of the central portion on the left side when viewed from the front of the inner peripheral surface of the rim portion 18 of the bowl portion 8. ing. In the present embodiment, the second rim water spouting port 24 (rim water spouting portion) is further formed on the rear side on the right side as viewed from the front and on the rear side from the first rim water spouting port. The first rim water spouting port 22 and the second rim water spouting port 24 form a swirl flow swirling in the same direction (counterclockwise direction in FIG. 1).

  Further, as shown in FIG. 1, a water conduit 10 formed behind the filth receiving surface 16 of the bowl portion 8 includes a first rim water passage 26 (a rim water passage) that supplies cleaning water to the first rim water spouting port 22. ) And a second rim water passage 28 (rim water passage) for supplying cleaning water to the second rim water spouting port 24. The branch region 10d is a rim water passage start region.

  In the flush toilet 1 of the present embodiment, the first rim water passage 26 including the first rim water outlet 22 and the second rim water passage 28 including the second rim water outlet 24 are made of earthenware. It is formed integrally with the toilet body 2. However, the present invention is not limited to such a form, and the first rim water passage including the first rim water outlet and the second rim water passage including the second rim water outlet are separate from the toilet body. The present invention can also be applied to a form formed by a distributor or the like.

  As shown in FIGS. 1 and 2, the filth receiving surface 16 of the bowl portion 8 of the flush toilet 1 according to the present embodiment includes a front filth receiving surface 16a and a rear filth receiving surface 16b. .

  And as shown in FIG.1 and FIG.2, the shelf-shaped water flow path 30 which guides wash water is formed in the downward area | region of the internal peripheral surface 18a of the rim | limb part 18. As shown in FIG. The shelf-shaped water passage 30 is also an outer peripheral region of the filth receiving surface 16. The shelf-shaped water passage 30 is provided to assist the cleaning water spouted from the first rim spout 22 turning along the inner peripheral surface 18 a of the rim portion 18, and the first rim spout 22 From the front end toward the front end of the bowl portion 8, the slope gradually descends downward, while from the front end toward the rear side, the slope gradually rises upward (see FIG. 2). The shelf-shaped water passage 30 is formed narrow at the rear end of the bowl portion 8.

  Due to the presence of the shelf-shaped water passage 30, the wash water discharged from the first rim water outlet 22 is drained from the shelf-type water passage 30 in the vicinity of the front end of the bowl portion 8 as shown in FIG. 1. A main flow M11 that starts to flow down toward the channel 12 is formed, and a substream M12 that starts to flow from the vicinity of the second rim water spouting port 24 toward the drainage channel 12 while continuing to flow through the shelf-shaped water passage 30 is formed. .

  On the other hand, since the rear end of the shelf-shaped water passage 30 is narrow, the wash water discharged from the second rim water outlet 24 flows from the shelf-shaped water passage 30 to the drainage channel 12 in the vicinity of the rear end of the bowl portion 8. A main flow M21 that starts to flow down is formed, and a side flow M22 that starts to flow from the vicinity of the first rim water spouting port 22 toward the drainage channel 12 while continuing to flow through the shelf-shaped water passage 30 is formed.

  Further, as shown in FIG. 2, the drainage channel 12 is configured by an introduction pipe 32 that is connected to the bottom surface of the recess 20 and extends rearward and downward. The introduction pipe 32 has a trap channel, that is, a channel portion 32a extending downward and a channel portion 32b extending upward again thereafter. The introduction pipe 32 is connected to the bottom surface of the concave portion 20 as a smooth continuous curved surface, and the cleaning water flowing into the introduction pipe 32 from the concave portion 20 flows smoothly through the introduction pipe 32.

  In the present embodiment, the bottom surface (at least part) of the water conduit 10, the rear-side filth receiving surface 16 b (at least part) of the bowl portion 8, and the top surface (at least part thereof) of the drainage channel 12 are It is comprised by the outer surface of the real area | region S (ceramic part). In the solid region S, a drainage channel 40 extending from the bottom surface of the water conduit 10 to the upper surface side of the drainage channel 12 is formed.

  The outlet opening 42 of the drainage channel 40 of the present embodiment is opened at the lowest position on the upper surface side of the drainage channel 12. The drainage channel 40 extends vertically downward in a region near the outlet opening 42.

Cross-sectional area of the inlet opening 41 of the drainage channel 40 is 7 mm ² to 20 mm ² approximately. However, the cross-sectional area of the portion excluding the inlet opening 41 of the drainage channel 40 (including the region near the inlet opening 41 of the drainage channel 40) is larger than the sectional area of the inlet opening 41 of the drainage channel 40. cage, specifically, is a 20mm ² ~80mm ² about. As shown in FIG. 1, the inlet opening 41 is circular in this embodiment. However, the present invention is not limited to such a form, and may be, for example, a semicircular shape or a quadrangular shape.

  And the height position of the bottom surface of the water conduit 10 is lowered toward the inlet opening 41 of the drain channel 40. Specifically, it is inclined at an inclination angle of about 5 °.

  Furthermore, the bottom surface of the water conduit 10 of the present embodiment has a recess 10r having a depth of about 5 mm, and the inlet opening 41 of the drainage channel 40 is provided in the recess 10r.

  Further, the bottom surfaces of the rim water passages 26 and 28 are lowered in height toward the recess 10r of the water guide passage 10 (that is, the inlet opening 41 of the water drain passage 40). Specifically, it is inclined at an inclination angle of about 2 °.

  Next, the operation of the present embodiment configured as described above will be described.

  When the user turns on an operation switch (not shown), the drainage port (not shown) of the water storage tank opens, and a predetermined amount of cleaning water flows into the water conduit 10. Wash water flows from the water conduit 10 through the first rim water passage 26 and the second rim water passage 28 through the rim water passage start region, and is discharged from the first rim water outlet 22 and the second rim water outlet 24, respectively.

  As described above, the bottom surface of the first rim water passage 26 and the bottom surface of the second rim water passage 28 are inclined so as to prevent the cleaning water from reaching the first rim water outlet 22 and the second rim water outlet 24. Is provided. However, since the wash water has momentum at the start of the inflow of the wash water, the wash water is discharged through the first rim water discharge port 22 and the second rim water discharge port 24 regardless of the inclination.

  In the present embodiment, the wash water discharged from the first rim water discharge port 22 forms a main flow M11 that starts to flow down from the shelf-shaped water passage 30 toward the drainage channel 12 in the vicinity of the front end of the bowl portion 8, and has a shelf shape. A substream M12 that starts flowing down from the vicinity of the second rim spout 24 toward the drainage channel 12 while continuing to flow through the water passage 30 is formed. Both the main flow M11 and the secondary flow M12 from the first rim spout 22 are swirled and are discharged to the drainage channel 12 while washing the filth receiving surface 16.

  On the other hand, the wash water discharged from the second rim spout 24 forms a main flow M21 that starts to flow down from the shelf-shaped water passage 30 toward the drainage channel 12 in the vicinity of the rear end of the bowl portion 8, and the shelf-shaped water passage 30. The substream M22 that starts to flow down from the vicinity of the first rim spout 22 toward the drainage channel 12 is formed. Both the main flow M21 and the secondary flow M22 from the second rim spout 24 are swirled and discharged to the drainage channel 12 while washing the filth receiving surface 16.

  Almost all of the predetermined amount of washing water that has flowed into the water conduit 10 is discharged from the first rim water discharge port 22 and the second rim water discharge port 24, and a small part of the water is discharged through the drainage flow channel 40. In addition, a small part is left in the flow and remains on the bottom surface of the water conduit 10 and the bottom surfaces of the first rim water passage 26 and the second rim water passage 28. If the remaining water stays in this way, there is a concern that mold and the like will grow. In addition, instilling from the rim spouts 22 and 24 may give a misunderstanding that the spout (cleaning) has not been completed, and the appearance is not good. There are concerns that arise.

  In the present embodiment, in order to solve such a problem, a drainage channel 40 extending from the bottom surface of the water conduit 10 to the upper surface side of the drainage channel 12 is formed, and the bottom surface of the water conduit 10 is an inlet of the drain channel 40. It inclines toward the opening 41 at an inclination angle of about 5 °. For this reason, the remaining water left in the water conduit 10 is guided to the inlet opening 41 of the drain channel 40 for drainage due to the inclination.

  In particular, in the present embodiment, a recess 10r having a depth of about 5 mm is provided on the bottom surface of the water conduit 10, and the inlet opening 41 of the drainage channel 40 is provided in the recess 10r. For this reason, the water head pressure according to the water level of the residual water collected by the said recessed part 10r acts, and it can anticipate a more effective water draining effect | action.

  In the present embodiment, the bottom surfaces of the rim water passages 26 and 28 are also inclined at an inclination angle of about 2 ° toward the concave portion 10r of the water conduit 10 (that is, the inlet opening 41 of the water drainage channel 40). For this reason, the remaining water left in the rim water passages 26 and 28 is also drained by being guided to the inlet opening 41 of the drainage channel 40 (in the opposite direction) due to the inclination.

  As described above, according to the present embodiment, after the cleaning of the bowl portion 8 with the cleaning water discharged from the rim spouts 22 and 24 is completed (the supply of the predetermined amount of cleaning water to the water conduit 10 is completed). After), the residual water that is likely to stay in the water conduit 10 is guided to the inlet opening 41 of the drainage channel 40 by the inclination of the bottom surface of the water conduit 10 and drained to the drain channel 12, and the rim channel 26 The residual water that is likely to stay in the rim 28 is also guided to the inlet opening 41 of the drainage channel 40 (in the opposite direction) by the inclination of the bottom surface of the rim water passages 26, 28 and drained into the drainage channel 12. In addition, instillation of residual water from the rim water spouting ports 22 and 24 via the rim water passages 26 and 28 is effectively suppressed.

  In particular, according to the drainage channel 40 of the present embodiment, since the length is relatively short from the rim water passage start region located on the rear side of the filth receiving surface 16 to the drainage channel 12, an effective drainage function is achieved. Can be expected.

  Moreover, since the water conduit 10 of this embodiment has the recessed part 10r and the inlet opening 41 of the drainage flow path 40 is provided in the said recessed part 10r, when residual water is collected in the said recessed part 10r. The water head pressure according to the water level acts, and a more effective draining action can be expected.

  In addition, since the outlet opening 42 of the drainage channel 40 of the present embodiment is opened at the lowest position on the upper surface side of the drainage channel 12, the sealed water level is lowered and odor is generated through the drainage channel 40. It is most effective for concerns that it will rise.

  In addition, since the cross-sectional area of the inlet opening 41 of the drainage channel 40 of the present embodiment is about 3 mm to 5 mm in diameter, the amount of washing water that is drained from the drainage channel 40 during the cleaning of the bowl portion 8 is Less is suppressed. On the other hand, since the cross-sectional area in the vicinity of the inlet opening 41 of the drainage flow path 40 is larger than the cross-sectional area of the inlet opening 41 of the drainage flow path 40, the surface tension acts and the residual water flows into the drainage flow path 40. It is also prevented that the air does not flow into the inlet opening 41.

  In addition, it is preferable that at least a part of the drainage flow path 40, for example, a portion excluding the inlet opening 41 and the vicinity thereof, is a part of the drainage flow path formed to discharge the slurry outside. That is, it is preferable to divert a part of the mud discharge channel formed in the manufacturing process of the solid region S manufactured as a pottery as at least a part of the drainage channel 40.

  Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is a cross-sectional view at the center in the left-right direction of a flush toilet 201 according to the second embodiment of the present invention.

  As shown in FIG. 3, in the flush toilet 201 of the present embodiment, the outlet opening 242 of the drainage channel 240 is opened on the rear side from the lowest position on the upper surface side of the drainage channel 12. Then, the direction of the region in the vicinity of the outlet opening 242 of the drainage channel 240 is rearward toward the outlet opening 242.

Sectional area of the drainage flow path 240 of this embodiment, including an inlet opening 241 and its neighboring region, and has a 78mm ² ~314mm ² about.

  Other configurations of the present embodiment are substantially the same as those of the first embodiment described with reference to FIGS. 1 and 2. In FIG. 3, the same reference numerals are given to the same parts as those in the first embodiment. Detailed descriptions of the same portions of the present embodiment as those in the first embodiment are omitted.

  According to this embodiment, the washing water passing through the drainage channel 240 acts to push the sealed water toward the rear side (discharge side). This action is effective in discharging filth (weak siphon).

In particular, the cross-sectional area of the drainage channel 240, by which a 78mm ² ~314mm ² about including an inlet opening 241 and its neighboring region, it is possible to sufficiently exhibit the weak siphon effect.

  Also according to the present embodiment, the same drainage effect as that of the first embodiment can be obtained.

  Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 4 is a cross-sectional view at the center in the left-right direction of a flush toilet 301 according to the third embodiment of the present invention.

  As shown in FIG. 4, in the flush toilet 301 of the present embodiment, the outlet opening 342 of the drainage channel 340 is opened in front of the lowest position on the upper surface side of the drainage channel 12. However, from the aesthetic point of view, the outlet opening 342 of the drainage channel 340 is provided at a position that cannot be seen from above the bowl portion 8. The drainage channel 340 extends rearward toward the outlet opening 342 in a region near the outlet opening 342.

Sectional area of the drainage flow path 340 of this embodiment, including an inlet opening 341 and its neighboring region, and has a 78mm ² ~314mm ² about.

  Other configurations of the present embodiment are substantially the same as those of the first embodiment described with reference to FIGS. 1 and 2. In FIG. 4, the same parts as those in the first embodiment are denoted by the same reference numerals. Detailed descriptions of the same portions of the present embodiment as those in the first embodiment are omitted.

  Even in the case of the present embodiment, the washing water passing through the drainage channel 340 acts to push the sealed water toward the rear side (discharge side). This action is effective in discharging filth (weak siphon).

In particular, the cross-sectional area of the drainage channel 340, by which a 78mm ² ~314mm ² about including an inlet opening 341 and its neighboring region, it is possible to sufficiently exhibit the weak siphon effect.

  Also according to the present embodiment, the same drainage effect as that of the first embodiment can be obtained.

  Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 5 is a cross-sectional view at the center in the left-right direction of a flush toilet 401 according to the fourth embodiment of the present invention.

  As shown in FIG. 5, in the flush toilet 401 of this embodiment, the drainage channel 440 has a trap channel 444. The trap channel 444 has a channel portion 444b extending upward again after the channel portion 444a extending downward.

  Other configurations of the present embodiment are substantially the same as those of the first embodiment described with reference to FIGS. 1 and 2. In FIG. 5, parts similar to those in the first embodiment are denoted by the same reference numerals. Detailed descriptions of the same portions of the present embodiment as those in the first embodiment are omitted.

  According to the present embodiment, the drainage flow path 440 includes the trap flow path 444, so that even if the sealed water surface is lowered with respect to the outlet opening 442 of the drainage flow path 440, The residual water flowing into the drainage channel 440 after the drainage of the residual water from the drainage channel 440 to the drainage channel 12 is interrupted, so-called sealed water is collected, and the odor rises through the drainage channel 440 by the sealed water. It is prevented from coming.

  Also according to the present embodiment, the same drainage effect as that of the first embodiment can be obtained.

  Next, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 6 is a cross-sectional view at the center in the left-right direction of a flush toilet 501 according to a fifth embodiment of the present invention.

  As shown in FIG. 6, also in the flush toilet 501 of this embodiment, the drainage channel 540 has a trap channel 544. The trap channel 544 has a channel portion 544b extending upward again after the channel portion 544a extending downward.

  However, as shown in FIG. 6, the outlet opening 542 of the drainage channel 540 is opened on the rear side from the lowest position on the upper surface side of the drainage channel 12 and is positioned above the designed sealed water surface. It has been.

  Other configurations of the present embodiment are substantially the same as those of the first embodiment described with reference to FIGS. 1 and 2. In FIG. 6, the same parts as those in the first embodiment are denoted by the same reference numerals. Detailed descriptions of the same portions of the present embodiment as those in the first embodiment are omitted.

  According to the present embodiment, the drainage channel 540 includes the trap channel 544, so that the drainage channel 540 is disposed even though the sealed water surface is lower than the outlet opening 542 of the drainage channel 540. The residual water flowing into the drainage channel 540 after the drainage of the residual water from the drainage channel 12 to the drainage channel 12 prevents so-called sealed water from accumulating, and prevents the odor from rising through the drainage channel due to the sealed water. Is done.

  Also according to the present embodiment, the same drainage effect as that of the first embodiment can be obtained.

  Next, a sixth embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a plan view showing a flow of washing water in the flush toilet 601 according to the sixth embodiment of the present invention, and FIG. 8 is a left and right view of the flush toilet 601 according to the sixth embodiment of the present invention. FIG. 9 is an enlarged plan view of the guide portion 10g of FIG.

  As shown in FIGS. 7 to 9, in the flush toilet 601 of the present embodiment, the guide portion 10 g that guides wash water from the upstream side toward the inlet opening 41 of the drainage channel 40 to the rim water passages 26 and 28. However, it protrudes from the bottom surface of the water conduit 10 upstream of the inlet opening 41 of the drain channel 40.

  Specifically, the guide portion 10g of the present embodiment as a whole is a protrusion having a circular arc shape that is concentric with the inlet opening 41 that is circular in plan view and symmetrical in the left-right direction (vertical symmetry in FIGS. 7 and 9). It is.

  Other configurations of the present embodiment are substantially the same as those of the first embodiment described with reference to FIGS. 1 and 2. 7 to 9, the same reference numerals are given to the same parts as those in the first embodiment. Detailed descriptions of the same portions of the present embodiment as those in the first embodiment are omitted.

  Also according to the present embodiment, the same drainage effect as that of the first embodiment can be obtained.

  And according to this embodiment, the washing water which goes to the inlet opening 41 of the drainage flow path 40 from an upstream side smoothly to the rim water flow paths 26 and 28 by the presence of the guide part 10g which is an arc-shaped protrusion as a whole. Since it can be guided, a sufficient amount of cleaning water can be discharged from the rim water discharge ports 26 and 28 during the cleaning of the bowl portion.

  In addition, the form of the guide part 10g is not limited to the circular arc shape as shown in FIGS. For example, as shown in FIG. 10, a V-shaped configuration that is bilaterally symmetric (in FIG. 10, vertically symmetric) may be adopted in plan view, or as shown in FIG. A mirror-like form may be adopted.

  Each of the above embodiments is a flush toilet bowl having two rim spouts 22 and 24 (see FIGS. 1 and 7), but the present invention is a flush type having only one rim spout. The present invention can also be applied to a toilet bowl or a flush toilet bowl having three or more spouts.

  The above embodiments are flush toilets that do not have a jet spout, but the present invention can also be applied to so-called siphon jet flush toilets that have a jet spout. .

DESCRIPTION OF SYMBOLS 1,101,201,301,401,501,601 Flush toilet bowl 2 Toilet body 8 Bowl part 10 Water conduit 10d Branch area 10r Recess 10g Guide part 12 Drainage path 16 Soil receiving surface 16a Front side waste receiving surface 16b Back side Soil receiving surface 18 Rim portion 18a Inner peripheral surface 20 Recessed portion 22 First rim spout (rim spout)
24 Second rim spout (rim spout)
26 1st rim waterway (rim waterway)
28 Second Rim Waterway (Rim Waterway)
32 Inlet pipe 32a Channel portion extending downward 32b Channel portion extending upward 40, 240, 340, 440, 540 Drain passage 41, 241, 341, 441, 541 Inlet opening 42, 242, 342, 442, 542 Outlet opening 444, 544 Trap channel of drainage channel 444a, 544a Channel portion extending downward 444b, 544b Channel portion extending upward

Claims (11)

A bowl portion having a bowl-shaped waste receiving surface, and a rim portion formed on the upper edge of the waste receiving surface;
A rim water spouting portion provided in the rim portion, for discharging washing water into the bowl portion to form a swirling flow by the washing water;
A water conduit that guides cleaning water to a rim water flow start area located on the rear side of the waste receiving surface; Waterways,
A drainage channel connected below the bowl portion and having a trap channel;
A drainage channel from the water conduit to the upper surface side of the drainage channel;
A flush toilet characterized by comprising The flush toilet according to claim 1, wherein a height position of the bottom surface of the water conduit is lowered toward an inlet opening of the drainage channel. The water conduit has a recess,
The flush toilet according to claim 1 or 2, wherein an inlet opening of the drainage channel is provided in the recess. The flush-type large according to any one of claims 1 to 3, wherein the bottom surface of the rim water passage has a lower height position toward an inlet opening of the water conduit or the drainage channel. Toilet bowl. The flush toilet according to any one of claims 1 to 4, wherein an outlet opening of the drainage channel is opened at a lowermost position on an upper surface side of the drainage channel. The outlet opening of the drainage channel is opened on the rear side from the lowest position on the upper surface side of the drainage channel,
The flush toilet according to any one of claims 1 to 4, wherein a direction in which the drainage channel extends in a region near the outlet opening is rearward toward the outlet opening. The outlet opening of the drainage channel is opened on the front side from the lowest position on the upper surface side of the drainage channel,
The flush toilet according to any one of claims 1 to 4, wherein the drainage channel extends rearward toward the outlet opening and extends in a region near the outlet opening. The flush toilet according to any one of claims 1 to 7, wherein the drainage channel has a trap channel. The water conduit has a guide portion that protrudes from the bottom surface of the water conduit on the upstream side from the inlet opening of the water drainage channel and guides cleaning water from the upstream side toward the inlet opening of the water drainage channel to the rim water conduit. A flush toilet according to any one of claims 1 to 8. The flush toilet according to any one of claims 1 to 9, wherein a cross-sectional area of a region near an inlet opening of the drainage channel is larger than a cross-sectional area of the inlet opening of the drainage channel. The flush toilet according to any one of claims 1 to 10, wherein at least a part of the drainage channel is a part of a mud channel formed to discharge mud to the outside. .

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