JP2017031772A - Water closet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain a siphon generated by sealing a drain tap pipeline of a water closet by water.SOLUTION: The present invention is a water closet 1 having a bowl part 2 for receiving dirt, a rising pipeline 16 rising backward from a lower part of the bowl part 2 and a drain trap pipeline 4 having a descent pipeline 18 of descending from the rising pipeline 16 and regulating reservoir water, and the descent pipeline 16 comprises an expansion part 22 for successively expanding a flow passage cross section in the horizontal direction downward, a contraction part 24 provided on the downstream side of the expansion part 22 and contracting the flow passage cross section in the horizontal direction more than the lower end of the expansion part 22 and a water receiving part 26 for connecting the expansion part 22 and the contraction part 24, and a recess part of delaying a flow of wash water of flowing in the descent pipeline, is formed of the expansion part 22 and the water receiving part 26.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a flush toilet that discharges filth by washing water supplied from a washing water source.

  Conventionally, a flush toilet bowl has been known as a toilet bowl that does not cause siphon action among the types of flush toilet bowls. Such a conventional wash-out toilet has the advantage that the structure is simpler and cheaper than the siphon-type toilet that produces a siphon action and cleans the toilet bowl, with the method of flushing filth by flowing water due to a water drop. There is. Further, even in such wash-out type flush toilets, it is required to save washing water.

In addition, as a drain socket for connecting the drain trap pipe of the toilet body of the flush toilet bowl and the underfloor drain pipe, a toilet main body side connecting pipe member connected to the outlet of the drain trap pipe of the toilet body An underfloor side connecting pipe member connected to the inlet of the underfloor drain pipe and having a bent pipe line; and an intermediate pipe member extending in a substantially straight line connecting the toilet body side connecting pipe member and the underfloor side connecting pipe member. A drain socket provided is known (for example, see Patent Document 1).
In such a conventional drainage socket, drainage, dirt, paper, etc. are sealed inside the drainage socket and a siphon action is generated, so that negative pressure is generated to draw the upstream drainage downstream. Pressure suppression means is provided in the bent conduit of the drain socket.

JP 2011-179187 A

However, in the flush toilet equipped with the conventional drainage socket described above, the drainage is sealed by filling the drainage trap conduit of the flush toilet on the upstream side of the drainage socket, and the upstream drainage goes downstream. There is a concern of being drawn. As a result, there is a concern that the sealed water in the flush toilet will be drawn downstream and broken or the sealed water will decrease.
In this way, when the sealed water in the flush toilet is broken or the sealed water is reduced, the corresponding amount of flush water must be added, contrary to the conventional water-saving needs of toilets. End up.

  Accordingly, the present invention has been made to solve the above-described problems, and is a flushing device that can suppress siphons that are generated when a drainage trap pipe of a flush toilet is sealed with drainage, filth, paper, or the like. The purpose is to provide a toilet.

  A flush toilet according to an aspect of the present invention includes a bowl portion that receives waste, a rising pipe that rises rearward from a lower portion of the bowl section, and a lowering pipe that descends from the rising pipe, and defines drainage. In the flush toilet provided with the trap pipe, the descending pipe is provided on the downstream side of the enlarged part and the enlarged part where the horizontal channel cross section sequentially expands downward, from the lower end of the enlarged part. And a water receiving portion connecting the enlarged portion and the reduced portion, and the flow of the wash water flowing through the descending pipeline by the enlarged portion and the water receiving portion. A recess is formed for delaying.

  According to this configuration, since the depression is provided in the descending pipeline of the drain trap pipeline, a part of the washing water drained from the ascending pipeline to the descending pipeline flows into the depression. Thereby, compared with the case where a hollow part is not provided, the flow of the washing water which flows through a downcomer is delayed. Therefore, siphon generated when the flow path of the drain trap pipe is sealed with drainage, dirt, paper, or the like can be suppressed.

  In the flush toilet according to one aspect of the present invention, preferably, the water receiving portion is inclined downward toward the reduced portion.

  According to this configuration, since the water receiving portion connecting the enlarged portion and the reduced portion is inclined downward toward the reduced portion, the washing water delayed by the hollow portion can be smoothly guided toward the reduced portion. Can do. Therefore, siphon generated by sealing the flow path of the drain trap pipe with drainage, dirt, paper, or the like can be suppressed without impairing the discharge performance of the drain trap pipe.

  In the flush toilet according to one aspect of the present invention, the recess is preferably formed on the entire circumference in the circumferential direction of the central axis of the descending conduit.

  According to this structure, since the hollow part is formed in the perimeter of the center axis | shaft of a descending pipe line, more washing water which flows through a down pipe line flows into a hollow part. Thereby, the flow of the washing water flowing through the descending pipeline is delayed, and siphon generated by sealing the flow path of the drain trap pipeline with drainage, filth, paper, or the like can be more reliably suppressed.

  In the flush toilet according to one aspect of the present invention, preferably, the lateral direction perpendicular to the front-rear direction is greater than the width of the recessed part in the front-rear direction in which the descending pipeline is provided with respect to the ascending pipeline The width of the recess is formed large.

  According to this configuration, since the width of the hollow portion in the left-right direction is larger than the width of the hollow portion in the front-rear direction, the left and right sides of the descending pipeline are not lengthened without increasing the length in the front-rear direction of the flush toilet. The dead space of direction can be used effectively. Therefore, siphon generated when the flow path of the drain trap pipe is sealed with drainage, filth, paper, or the like can be suppressed while reducing the overall size of the flush toilet.

  In the flush toilet according to one aspect of the present invention, the water receiving section is preferably formed at a position lower than the flow path center of the inlet section of the drain trap pipe.

  According to this configuration, since the water receiving portion is formed at a position lower than the flow channel center of the inlet portion of the drain trap pipe, a sufficient space is formed in the height direction. That is, a hollow part can be formed larger. Therefore, siphon generated when the flow path of the drain trap pipe is sealed with drainage, dirt, paper, or the like can be more reliably suppressed.

  In the flush toilet according to one aspect of the present invention, preferably, the flush toilet is a flush toilet.

  According to this configuration, in the wash-out toilet, siphons that are generated when the flow path of the drain trap pipe is sealed with drainage, dirt, paper, or the like can be suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, in the flush toilet, the siphon which generate | occur | produces when the drain trap pipe line of the flush toilet is sealed with drainage, filth, paper, etc. can be suppressed.

It is a schematic sectional drawing of the flush toilet concerning one Embodiment of this invention. It is a schematic sectional drawing of the drain trap pipe concerning one embodiment of the present invention. It is sectional drawing seen along the AA line of FIG. It is sectional drawing seen along the BB line of FIG. It is sectional drawing seen along CC line of FIG. It is a schematic sectional drawing of the drain trap pipe showing typically the flow in the drain trap pipe concerning one embodiment of the present invention. It is a schematic sectional drawing of the drain trap pipe | tube in case the center axis | shaft of the descending pipe line and the center axis | shaft of a discharge port which concern on the modification of this invention are eccentric. It is sectional drawing seen along the DD line of FIG. FIG. 6 is a schematic cross-sectional view of a drain trap pipe when a groove is formed in a water receiving portion when the central axis of a descending pipe line and the central axis of a discharge port according to a modification of the present invention are coincident with each other. . It is sectional drawing seen along the EE line | wire of FIG. It is a schematic sectional view of a drain trap pipe when a groove is formed in a water receiving part in the case where the central axis of the descending pipe line and the central axis of the discharge port are eccentric according to a modification of the present invention. It is sectional drawing seen along the FF line of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.

<Structure of flush toilet>
First, a flush toilet according to an embodiment of the present invention will be described with reference to FIG. In this embodiment, a flush toilet bowl will be described.

  FIG. 1 is a schematic cross-sectional view of a flush toilet according to an embodiment of the present invention. In FIG. 1, the water level of the stored water is indicated by WL. Further, the central axis of the descending pipeline 18 or the discharge port 20 is indicated by X.

  As shown in FIG. 1, a flush toilet 1 that is a wash-off type stores a bowl portion 2 that receives filth, a drain trap pipe 4 that extends from a lower portion of the bowl portion 2, and wash water used for toilet flushing. And a gravity water supply type water storage tank (not shown) as a washing water source to be supplied to the bowl portion 2. On the upper surface of the flush toilet 1, a water supply port 6 for supplying wash water from the water storage tank to the flush toilet 1 is opened. The bowl portion 2 is formed with a rim spout 8 for discharging the wash water supplied from the water storage tank.

Here, in this embodiment, the direction along the floor surface on which the flush toilet 1 is provided will be referred to as the horizontal direction, and the direction orthogonal thereto will be referred to as the vertical direction.
Moreover, the direction in which the flush toilet 1 is provided with respect to the floor is upward (upward), the opposite side is downward (downward), and the side on which the water supply port 6 is provided with respect to the bowl portion 2 is backward ( Back), the opposite side to the front (front), the vertical direction and the direction orthogonal to the front-rear direction, to the rear, the right side to the right (right), the left to the left (left) To do.

  The bowl portion 2 includes a bowl-shaped filth receiving surface 10, a recessed portion 12 formed downward from the lower edge portion 10 a of the filth receiving surface 10 and connected to the drain trap pipe 4, and an upper edge portion of the bowl portion 2. And a rim portion 14 formed along.

  The rim spout 8 is formed at the upper rear of the bowl portion 2, and the cleaning water is discharged forward along the inner peripheral surface 14 a of the rim portion 14 formed at the upper portion of the bowl 2 from the rim spout 8. To do. The washing water discharged from the rim water spouting port 8 forms a swirling flow that swirls around the filth receiving surface 10 and flows into the recess 12.

  The bowl portion 2 and the drain trap pipe 4 are integrally formed, and the trap pipe inlet portion 4a of the drain trap pipe 4 is located behind and below the concave portion 12 of the dirt receiving surface 10 of the bowl portion 2. Is open.

<Configuration of drain trap line>
Below, with reference to FIGS. 2-5, the drain trap pipe line 4 which concerns on embodiment of this invention is demonstrated.

  FIG. 2 is a schematic cross-sectional view of a drain trap pipe according to an embodiment of the present invention. 3 is a cross-sectional view taken along line AA in FIG. FIG. 4 is a cross-sectional view taken along line BB in FIG. FIG. 5 is a cross-sectional view taken along line CC in FIG. In FIG. 2, the central axis X of the descending pipeline 18 overlaps the line AA. In FIG. 3, the central axes of the descending pipeline 18 and the discharge port 20 are indicated by X.

  As shown in FIG. 2, the drain trap pipe 4 includes a rising pipe 16 that rises rearward from a trap pipe inlet 4 a formed in the lower part of the bowl portion 2, and a down pipe that descends from the rising pipe 16. 18. In addition, water is defined in the lower part of the bowl part 2 and a part of the ascending pipeline 16 (see FIG. 1).

  The ascending pipeline 16 extends upward and rearward of the trap conduit inlet 4a, and a descending pipeline 18 extending downward from the ascending pipeline 16 in the vertical direction is continuous. Between the ascending pipeline 16 and the descending pipeline 18, a trap pipeline top 4 b that is the highest position of the bottom surface of the drain trap pipeline 4 is formed. In addition, a discharge port 20 for discharging water in the drain trap pipe 4 is provided at the downstream end of the descending pipe 18.

  The descending pipe line 18 is provided on the downstream side of the enlarged portion 22 and the enlarged portion 22 where the horizontal flow passage section sequentially expands downward, and the horizontal flow passage cross section is smaller than the lower end of the enlarged portion 22. And a water receiving portion 26 that connects the enlarged portion 22 and the reduced portion 24 to each other.

  As shown in FIGS. 2 and 3, the enlarged portion 22 is formed continuously from the ascending pipeline 16 via the trap pipeline top 4b, and extends vertically downward from the downstream end of the trap pipeline top 4b. A flow path is formed. Further, the expansion portion 22 is formed so that the flow path sequentially expands in the horizontal direction away from the central axis X of the descending pipe line 18 from upstream to downstream (downward). That is, as shown in FIGS. 4 and 5, the enlarged portion 22 is formed over the entire circumference of the descending pipeline 18, and the horizontal flow path cross section of the enlarged portion 22 becomes larger toward the downstream. The entire circumference of the descending pipeline 18 is the circumferential direction of the central axis X of the descending pipeline 18.

  Returning to FIG. 2, on the downstream side of the enlarged portion 22, there is provided a cylindrical reduced portion 24 that is formed continuously from a downstream end portion of a water receiving portion 26 described later and extends vertically downward. The horizontal flow path cross section of the reduction section 24 is smaller than the horizontal flow path cross section at the lower end of the expansion section 22 and is formed substantially the same as the flow path cross section of the ascending pipeline 16. In addition, a discharge port 20 is opened at the downstream end portion of the reduction portion 24, and the discharge port 20 and an inlet portion (not shown) of an underfloor drain pipe provided under the floor are connected to a drain socket (not shown). Connected).

  Between the enlarged portion 22 and the reduced portion 24, a water receiving portion 26 is formed in a direction from the entire inner wall circumference at the lower end of the enlarged portion 22 toward the reduced portion 24 (the central axis X of the descending pipeline 18). The water receiver 26 connects the enlargement unit 22 and the reduction unit 24, receives the wash water flowing down in the enlargement unit 22, and guides the received wash water to the reduction unit 24. Further, the water receiving portion 26 is formed at a position lower than the trap pipe inlet portion 4 a and is inclined downward from the entire inner wall circumference at the lower end of the enlarged portion 22 toward the reduced portion 24.

  The enlarged portion 22 and the water receiving portion 26 form a recess 28 that delays the wash water flowing through the descending pipeline 18. The recessed portion 28 is a space above the water receiving portion 26 and is defined by the upper surface of the water receiving portion 26 and the enlarged portion 22. Further, the recess 28 is formed above the water receiver 26 in the entire circumferential direction of the central axis X of the descending pipe line 18, and a part of the washing water flows into the recess 28 so that the descending pipe The flow of the wash water flowing through the path 18 is delayed.

  As shown in FIGS. 4 and 5, the enlarged portion 22 is formed so that the width in the left-right direction is greatly enlarged downward than the width in the front-rear direction. Further, the width of the water receiving portion 26 is formed larger in the left-right direction than in the front-rear direction. That is, the width of the dent portion 28 in the left-right direction is larger than the width of the dent portion 28 in the front-rear direction in which the descending pipeline 18 is provided for the ascending pipeline 16.

<Operation and action>
Next, the flow of water in the drain trap pipe 4 according to the embodiment of the present invention will be described with reference to FIG.

  FIG. 6 is a schematic cross-sectional view of a drain trap pipe schematically showing a flow in the drain trap pipe according to an embodiment of the present invention.

  First, when toilet bowl cleaning is started by a command from an operation unit (not shown), flush water in a water storage tank (not shown) is supplied into the flush toilet 1 through the water supply port 6. Wash water supplied into the flush toilet 1 is discharged from a rim spout 8 formed in the bowl portion 2. After the inside of the bowl portion 2 is washed by the swirling flow, the washing water discharged from the rim water discharge port 8 causes the filth to rise from the trap pipe inlet 4a of the drain trap pipe 4 by flowing water due to a water drop. 16 to discharge. As shown in FIG. 6, the washing water discharged together with the filth in the ascending pipeline 16 (hereinafter, the washing water discharged together with the filth will be simply referred to as washing water) rises up the ascending pipeline 16. Then, the trap pipe reaches the top 4b and flows toward the descending pipe 18 (F1).

  The washing water F1 flowing into the descending pipeline 18 from the ascending pipeline 16 first flows into the enlarged portion 22 (F2 to F4). When the flow rate of the washing water F1 flowing from the ascending pipeline 16 to the descending pipeline 18 is small, for example, during a predetermined time from the start of cleaning the toilet, it flows down along the channel wall surface on the front side of the enlarged portion 22 (F2). ). Here, since the descending pipe line 18 is provided with the enlarged portion 22, when the flow rate of the washing water F <b> 1 flowing from the ascending pipe line 16 into the descending pipe line 18 is increased, the downward washing is performed from above the enlarged portion 22. Water flows down while spreading over the entire flow path (F2 to F4). In addition, although illustration is abbreviate | omitted, washing water flows down by the enlarged part 22 spreading in the left-right direction in FIG.

  A part of the wash water flowing down while spreading over the entire flow path of the descending pipe line 18 by the enlarged portion 22 flows into the recessed portion 28. The washing water that has not flowed into the depression 28 flows down from the enlarged portion 22 to the reduced portion 24 and is discharged from the discharge port 20 (F6). The washing waters F2 and F4 that have flowed into the depression 28 are delayed in flow as compared with the washing water that has not flowed into the depression 28 and has flowed directly from the enlargement part 22 to the reduction part 24.

  The washing water that has flowed into the depression 28 and whose flow has been delayed hits the water receiving portion 26. Then, it flows into the reduction part 24 along the water receiving part 26 (F5, F7). Here, since the water receiving portion 26 is inclined downward toward the reducing portion 24, the cleaning water that has hit the water receiving portion smoothly flows into the reducing portion 24. Then, the wash water that has flowed into the reduction unit 24 flows down through the reduction unit 24 and is discharged from the discharge port 20.

  The flow of the washing water flowing down the descending pipe line 18 is delayed by the depression part 28, so that the descent is performed while delaying the time during which the flow rate flowing through the down pipe line 18 becomes maximum as compared with the case where the depression part 28 is not formed. The maximum value of the instantaneous flow rate flowing in the pipe line 18 becomes small. In other words, when the depression 28 is formed, the washing water flows through the descending pipe line 18 over a longer time than when the depression 28 is not formed.

  According to the flush toilet 1 according to the embodiment of the present invention described above, the depression 28 is provided in the descending pipeline 18 of the drain trap pipeline 4 so that the drainage from the ascending pipeline 16 to the descending pipeline 18 is performed. A part of the washed water flows into the recess 28. Thereby, compared with the case where the hollow part 28 is not provided, the flow of the washing water which flows through the descending pipe line 18 is delayed. Therefore, siphon generated when the flow path of the drain trap pipe 4 is sealed with drainage, dirt, paper, or the like can be suppressed.

  Moreover, according to the flush toilet 1 by one Embodiment of this invention mentioned above, since the water-receiving part 26 which connects the expansion part 22 and the reduction part 24 inclines below toward the reduction part 24, it is a hollow. The washing water delayed by the portion 28 can be smoothly guided toward the reducing portion 24. Therefore, siphon generated by sealing the flow path of the drain trap pipe 4 with drainage, dirt, paper, or the like can be suppressed without impairing the discharge performance of the drain trap pipe 4.

  Furthermore, according to the flush toilet 1 according to the embodiment of the present invention described above, the recess 28 is formed on the entire circumference in the circumferential direction of the central axis X of the descending pipeline 18, so that it flows through the descending pipeline 18. A lot of washing water flows into the recess 28. Thereby, the flow of the washing water flowing through the descending pipe line 18 is delayed, and siphons generated by sealing the flow path of the drain trap pipe 4 with drainage, filth, paper, etc. can be more reliably suppressed. .

  Further, according to the flush toilet 1 according to the above-described embodiment of the present invention, the width of the left and right recesses 28 is larger than the width of the recess 28 in the front and rear direction. The dead space in the left-right direction of the descending pipeline 18 can be effectively used without increasing the length in the front-rear direction. Therefore, siphon generated when the flow path of the drain trap pipe 4 is sealed with drainage, filth, paper, or the like can be suppressed while the overall size of the flush toilet 1 is made compact.

  Furthermore, according to the flush toilet 1 according to the embodiment of the present invention described above, the water receiving part 26 is formed at a position lower than the flow path center of the trap pipe inlet part 4a of the drain trap pipe 4. A sufficient space is formed in the height direction. That is, the recessed portion 28 can be formed larger. Therefore, siphon generated when the flow path of the drain trap pipe 4 is sealed with drainage, dirt, paper, or the like can be more reliably suppressed.

<Modification>
As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above.

  For example, the configuration in which the central axis of the descending pipe line 18 and the central axis of the discharge port 20 have been described has been described, but the central axis of the down pipe line 18 and the central axis of the discharge port 20 may be eccentric.

Here, the drain trap pipe 4 in which the central axis of the descending pipe 18 and the central axis of the discharge port 20 are eccentric will be described with reference to FIGS. 7 and 8.
7 and 8, the same parts as those in the flush toilet 1 according to the embodiment of the present invention described above are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 7 is a schematic cross-sectional view of the drain trap pipe when the center axis of the descending pipe line and the center axis of the discharge port according to the modification of the present invention are eccentric. FIG. 8 is a cross-sectional view taken along line DD in FIG. In FIG. 7, the central axis Y of the descending pipeline 18 overlaps the line DD, and the central axis of the discharge port 20 is indicated by Z. Further, in FIG. 8, the central axis of the descending pipeline 18 is indicated by Y.

  As shown in FIG. 7, the ascending pipeline 16 extends upward and rearward of the trap pipeline entrance 4 a, and a descending pipeline 18 extending downward from the ascending pipeline 16 in the vertical direction is continuous. Between the ascending pipeline 16 and the descending pipeline 18, a trap pipeline top 4 b that is the highest position of the bottom surface of the drain trap pipeline 4 is formed. Further, a discharge port 20 is provided at a downstream end portion of the descending pipeline 18 at a position eccentric from the central axis Y of the descending pipeline 18. The central axis Z of the discharge port 20 is located on the front side of the central axis Y of the descending pipeline 18.

  The descending pipe line 18 is provided with an enlarged portion 22 where the horizontal channel cross section sequentially expands downward and a bent portion where the flow channel is bent from the horizontal direction to the vertical direction. 30, a water receiving portion 26 that connects the enlarged portion 22 and the bent portion 30, and a downstream end portion of the bent portion 30, are formed continuously, and the horizontal flow path cross section is smaller than the lower end of the enlarged portion 22. And a reduction unit.

  As shown in FIGS. 7 and 8, the enlarged portion 22 is formed continuously from the ascending pipeline 16 via the trap pipeline top 4b, and extends vertically downward from the downstream end of the trap pipeline top 4b. A flow path is formed. The expanding portion 22 is formed so that the flow path expands in the horizontal direction away from the central axis Y of the descending pipe line 18 from upstream to downstream (toward downward). That is, the enlarged portion 22 is formed over the entire circumference of the descending pipeline 18, and the horizontal flow path cross section of the enlarged portion 22 increases as it goes downstream. The entire circumference of the descending pipeline 18 is the circumferential direction of the central axis Y of the descending pipeline 18.

  The bent portion 30 is formed continuously from the downstream end portion of the enlarged portion 22 and the water receiving portion 26 toward the front side in FIG. An inlet portion 30 a of the bent portion 30 is provided on the inner wall on the front side at the downstream end portion of the enlarged portion 22. The channel cross section of the bent portion 30 is formed smaller than the horizontal channel cross section at the lower end of the enlarged portion 22. Further, a reduced portion 24 is continuously formed at the downstream end portion of the bent portion 30.

  A water receiving portion 26 is formed between the enlarged portion 22 and the bent portion 30 in a direction from the entire inner wall circumference at the lower end of the enlarged portion 22 toward the inlet portion 30 a of the bent portion 30. The water receiver 26 connects the enlarged portion 22 and the bent portion 30, receives the cleaning water flowing down in the enlarged portion 22, and guides the received cleaning water to the bent portion 30. Further, the water receiving portion 26 is formed at a position lower than the trap pipe inlet portion 4 a and is inclined downward from the entire inner wall at the lower end of the enlarged portion 22 toward the inlet portion 30 a of the bent portion 30. .

The reduction part 24 is a cylindrical pipe line extending vertically downward from the downstream end of the bent part 30, and the flow path cross section of the reduction part 24 is formed substantially the same as the flow path cross section of the ascending pipe line. In addition, a discharge port 20 is opened at the downstream end portion of the reduction portion 24, and the discharge port 20 and an inlet portion (not shown) of an underfloor drain pipe provided under the floor are connected to a drain socket (not shown). Connected).
In this modification, the reduced portion 24 and the bent portion 30 function as the reduced portion in the above-described embodiment of the present invention.

  The enlarged portion 22 and the water receiving portion 26 form a recess 28 that delays the wash water flowing through the descending pipeline 18. The recessed portion 28 is a space above the water receiving portion 26 and is defined by the upper surface of the water receiving portion 26 and the enlarged portion 22. Further, the recess 28 is formed above the water receiving portion 26 in the entire circumferential direction of the central axis Y of the descending pipe 18, and a part of the washing water flows into the recess 28 so that the descending pipe The flow of the wash water flowing through the path 18 is delayed.

  Also in this modification, the enlarged portion 22 is formed such that the width in the left-right direction is greatly enlarged downward than the width in the front-rear direction. Further, the water receiving portion 26 is also formed with a width in the left-right direction larger than the width in the front-rear direction. That is, the width of the dent portion 28 in the left-right direction is larger than the width of the dent portion 28 in the front-rear direction in which the descending pipeline 18 is provided for the ascending pipeline 16.

  Further, for example, the water receiving portion 26 may be formed with a U-shaped or V-shaped groove extending in the front-rear direction of the water receiving portion 26.

Here, referring to FIG. 9 and FIG. 10, when the central axis of the descending pipe line and the central axis of the discharge port according to the modified example of the present invention coincide with each other, the water receiving portion 26 extends in the front-back direction. A configuration in which a U-shaped groove is formed will be described.
9 and 10, the same parts as those in the flush toilet 1 according to the embodiment of the present invention described above are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 9 is a schematic diagram of a drain trap pipe when a groove is formed in the water receiving portion when the central axis of the downflow pipe and the central axis of the discharge port according to the modification of the present invention are coincident with each other. It is sectional drawing. FIG. 10 is a cross-sectional view taken along the line EE of FIG.

  As shown in FIG. 9, the water receiver 26 is formed with a U-shaped groove 32 extending in the front-rear direction of the water receiver 26. The groove 32 is recessed downward from above so as to form a U shape, and is formed in a direction from the front end portion or the rear end portion of the water receiving portion 26 toward the reducing portion 24. The water receiving portion 26 is inclined downward in the direction toward the reducing portion 24 and is also inclined downward in the direction toward the groove 32 as shown in FIG.

  Since the groove 32 is formed in the water receiving portion 26, most of the washing water received by the water receiving portion 26 flows into the groove 32. Therefore, since wash water can be collected by the center of the reduction | decrease part 24, the flow in the descending pipe line 18 can be made smooth.

Next, referring to FIG. 11 and FIG. 12, when the center axis of the descending pipeline and the center axis of the discharge port are eccentric, a U-shaped groove extending in the front-rear direction is formed in the water receiving portion 26. Explain the configuration.
In addition, in FIG.11 and FIG.12, the same code | symbol is attached | subjected about the same part as the flush toilet 1 by one Embodiment of this invention mentioned above, and those description is abbreviate | omitted.

  FIG. 11 is a schematic cross-sectional view of a drain trap pipe when a groove is formed in the water receiving portion when the center axis of the descending pipe line and the center axis of the discharge port are eccentric according to a modification of the present invention. FIG. FIG. 12 is a cross-sectional view taken along line FF in FIG.

  As shown in FIG. 11, the water receiving portion 26 is formed with a U-shaped groove 32 extending in the front-rear direction of the water receiving portion 26. The groove 32 is recessed downward from above so as to form a U shape, and is formed in a direction from the rear end portion of the water receiving portion 26 toward the bent portion 30. The water receiver 26 is inclined downward in the direction toward the bent portion 30 and is also inclined downward in the direction toward the groove 32 as shown in FIG.

  Since the groove 32 is formed in the water receiving portion 26, most of the washing water received by the water receiving portion 26 flows into the groove 32. Therefore, since wash water can be collected by the center of the reduction | decrease part 24, the flow in the descending pipe line 18 can be made smooth.

  Further, for example, the washing water source for supplying the washing water to the flush toilet 1 is not limited to a tank-type one such as the water storage tank of the gravity water source shown in the above-described embodiment, A direct water supply type that is directly used, a flush valve type, or a type that supplies cleaning water using the supplementary pressure of a pump may be used.

  In addition, for example, the flush toilet 1 is a wash-out toilet, but is not limited thereto, and may be applied to a siphon toilet. In that case, the shape and the inclination angle of the surface of the water receiving portion 26 are adjusted so that the cleaning water received by the water receiving portion 26 is collected in the reducing portion 24 and the reducing portion 24 is sealed.

  In addition, for example, the configuration in which the enlarged portion 22 is formed over the entire circumference of the descending pipe line 18 has been described. However, the present invention is not limited to this. It may be formed so as to be recessed in one direction. Or you may form in the direction which combined some of the front-back direction and the left-right direction.

  In addition, for example, the configuration in which the bowl portion 2 and the drain trap conduit 4 are integrally formed has been described, but the configuration is not limited thereto, and the bowl portion 2 and the drain trap conduit 4 are formed separately. May be. Alternatively, the descending pipe line 18 in which the recess part is formed may be formed separately by integrally forming the bowl part 2 to the downstream end of the trap pipe top part 4b.

  In addition, for example, the configuration in which the flow path cross section of the reduction portion 24 is formed to be substantially the same as the flow path cross section of the ascending pipe line 16 is described, but is formed smaller than the horizontal flow path cross section at the lower end of the enlarged portion 22. As long as it is made, it may be smaller or larger than the cross section of the rising pipe 16.

  The elements included in each of the embodiments described above can be combined as much as technically possible, and combinations thereof are also included in the scope of the present invention as long as they include the features of the present invention.

DESCRIPTION OF SYMBOLS 1 Flush toilet 2 Bowl part 4 Drain trap pipe 4a Trap pipe inlet part 4b Trap pipe top part 6 Water supply port 8 Rim water outlet 10 Soil receiving surface 10a Lower edge part 12 Recessed part 14 Rim part 16 Rising pipe 18 Down pipe Path 20 Discharge port 22 Enlarged part 24 Reduced part 26 Water receiving part 28 Recessed part 30 Bent part 30a Inlet part 32 Groove

WL water level

Claims (6)

A flush unit comprising: a bowl part for receiving waste; a drain pipe line that has a rising pipe line that rises rearward from the lower part of the bowl part and a down pipe line that descends from the rising pipe line, and that defines stored water. In the toilet bowl
The descending pipe line is provided on the downstream side of the enlarged portion where the horizontal flow passage section sequentially expands downward and the enlarged portion, and the horizontal flow passage cross section is smaller than the lower end of the enlarged portion. A reducing portion, and a water receiving portion connecting the expanding portion and the reducing portion,
The flush toilet in which the hollow part which delays the flow of the wash water which flows through the said down pipe line is formed by the said expansion part and the said water receiving part. The flush toilet according to claim 1, wherein the water receiving portion is inclined downward toward the reduced portion.   The flush toilet according to claim 1 or 2, wherein the depression is formed on the entire circumference in the circumferential direction of the central axis of the descending pipeline.   The width of the left-right dent part orthogonal to the said front-back direction is formed larger than the width | variety of the said dent part of the front-back direction in which the said down pipe line is provided with respect to the said rising pipe. A flush toilet according to 1.   The flush toilet according to any one of claims 1 to 4, wherein the water receiving portion is formed at a position lower than a flow path center of an inlet portion of the drain trap pipe.   The flush toilet according to any one of claims 1 to 5, wherein the flush toilet is a wash-out toilet.

Images