JP2020041367A - Wash basin - Google Patents

Abstract

To prevent foreign matters or the like in a bowl from intruding into an overflow flow passage.SOLUTION: A wash stand A comprises: a water storage bowl 10 whose drain port 11 is opened at a bottom part; a drain channel 12 extending to a downstream side from the drain port 11 in a drain direction; an overflow flow passage 13 having a flow-in port 30 which is branched from the drain channel 12; a drain plug 14 which can block a flow of water in the drain channel 12 at a downstream side with respect to the flow-in port 30 in the drain direction; and a filter 16 arranged between the drain port 11 and the flow-in port 30. By this constitution, a possibility that foreign matters in the bowl 10 intrude into the overflow flow passage 13 is low.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a sink.

  In Patent Document 1, a water storage bowl (tank body) having a drain port opened at the bottom, a drain pipe extending downward from the drain port, and water in the bowl are discharged only through the drain pipe. A washstand provided with a drain plug (a valve portion) for blocking a drain path and an overflow pipe connected to a drain pipe is disclosed. The overflow pipe has an overflow branch port (overflow drain port) communicating with the drain pipe below the drain port, and an overflow merging port communicating with the drain pipe below the overflow branch port.

  The drain plug is housed in the drain pipe and provided at a height between the overflow branch and the overflow junction. When water is supplied to the bowl with the drain pipe closed by the drain plug, part of the supplied water flows from the bowl into the space above the drain plug in the drain pipe, and overflows through the overflow branch. And the water level in the bowl and the overflow pipe rises at almost the same height. After the specified water level has been reached in the bowl and the overflow pipe, excess water is discharged from the overflow pipe to the drain pipe through the overflow junction.

JP 2011-117229 A

  The inside of the bowl and the inside of the overflow pipe communicate with the upper end of the drain pipe via the overflow branch port. Therefore, when water is collected in the bowl and the supply of water is stopped, water is transferred between the bowl side and the overflow pipe side when hand washing or other work is performed inside the bowl, causing foreign matter or the like in the bowl. May flow into the overflow channel.

  The present invention has been made in view of the above-mentioned conventional circumstances, and has as an object to solve the problem of preventing foreign substances and the like in a bowl from entering an overflow flow path.

The present invention
A bowl with a drain opening at the bottom,
A drainage channel extending from the drainage port to a drainage direction downstream side,
An overflow channel having an inlet branched from the drainage channel,
A drain plug that can shut off the flow of water in the drainage channel on the downstream side in the drainage direction from the inlet,
A filter provided between the drain port and the inflow port.

  Since the wash basin according to the present invention includes the filter, the possibility that foreign matters in the bowl enter the overflow channel is reduced.

Side sectional view of the sink of Example 1 Partial enlarged side sectional view inside drainage channel Partial enlarged sectional side view of the inside of a drainage channel of a sink according to a second embodiment. Partially enlarged side sectional view showing a state in which a drain cock in a drainage channel is at a valve closing position in the wash basin according to the third embodiment.

  The present invention may further include a perforated plate arranged to cover the drain port, and the filter may be provided on the perforated plate. According to this configuration, cleaning and maintenance of the filter can be performed by removing the perforated plate from the drain port.

  In the present invention, the filter may be provided on the drain plug. According to this configuration, when the drain plug moves between the position where the flow of water is shut off and the position where the flow of water is allowed, foreign matter attached to the filter is removed from the filter. This can prevent the filter from being clogged.

  In the present invention, the filter may partition a drainage path that does not pass through the overflow flow passage into an upstream side and a downstream side. According to this configuration, during normal use, the hair or the like that has flowed into the drainage channel can be captured by the filter.

  The present invention may further include a backflow prevention member provided between the drain port and the filter, which allows a flow of water toward a downstream side in a drain direction and blocks a flow of water toward an upstream side in a drain direction. Good. According to this configuration, it is possible to prevent foreign matter captured by the filter from entering the bowl.

<Example 1>
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. In the following description, the directions that appear in FIGS. 1 and 2 are defined as upward and downward as they are, and the left and right directions in FIGS.

  The wash basin A of the first embodiment functionally includes a bowl 10 for storing water and hot water, a circular drain port 11 opening at the bottom of the bowl 10, and extending downward from the drain port 11. Drain channel 12, overflow channel 13, drain plug 14, eye plate 15 for covering drain hole 11, filter 16 provided in eye plate 15, and backflow prevention member 17 provided in eye plate 15. It has.

  The drain plug 14 is used to shut off the flow of water in the shortest drain passage 18 when storing water or hot water in the bowl 10. In the first embodiment, the “shortest drain path 18” is a path in which water in the bowl 10 flows only through the drain path 12 without passing through the overflow channel 13. The overflow channel 13 is a means for preventing water or hot water from overflowing from an opening edge of the upper end of the bowl 10 when water or hot water is stored in the bowl 10.

  The drainage channel 12 constitutes a shortest drainage channel 18 for discharging the water or hot water in the bowl 10 without passing through the overflow channel 13. The filter 16 is a means for preventing foreign substances and the like in the bowl 10 from entering the overflow channel 13. The backflow prevention member 17 is means for preventing foreign matter in the overflow channel 13 from entering the bowl 10.

  The wash basin A is composed of a ceramic wash basin body 20, a cylindrical drain pipe 25, a communication pipe 31, a curved pipe 33, a float valve 36, a drain plug 14, The plate 15 is provided. On the sink main body 20, a bowl 10, a drain port 11, a cylindrical mounting portion 21, an ascending flow path 22, a storage space 23, and an exhaust hole 24 are formed. The tubular mounting portion 21 projects vertically downward from the drain port 11.

  The upper end of the drain pipe 25 is connected to the cylindrical mounting portion 21 by screwing a nut 26. The internal space of the connected drain pipe 25 functions as a drain passage 12 that communicates with the inside of the bowl 10 via the drain port 11. An annular (cylindrical) communication space 27 is formed between the inner periphery of the cylindrical mounting portion 21 and the outer periphery of the upper end of the drain pipe 25. At the upper end of the drain pipe 25, a plurality (for example, two) of outflow holes 28 for communicating the drain passage 12 with the communication space 27 are formed at intervals in the circumferential direction. A stepped valve seat 29 facing upward (toward the drain port 11) is formed at a position below (outflow in the drain direction) the outflow hole 28 on the inner periphery of the drain pipe 25. In the first embodiment, the “drain direction” is the direction of the flow of water in the shortest drain path 18.

  The ascending flow path 22 is formed in a hole shape formed in a substantially L-shape in side view along the outer surfaces of the bottom wall and the rear wall constituting the bowl 10. The ascending flow path 22 constitutes the overflow flow path 13, and a lower end portion (upstream end in the overflow direction) of the ascending flow path 22 is an inflow port 30 connected to the rear surface of the cylindrical mounting portion 21. The inflow port 30 is open so as to communicate with the upper end of the drain pipe 25 (drain passage 12) via the internal space (communication space 27) of the cylindrical mounting portion 21. The opening position of the inflow port 30 is a position facing the outflow hole 28 of the drain pipe 25 in the up-down direction, and above the valve seat 29 in the up-down direction (upstream in the drain direction). In the first embodiment, the “overflow direction” is a direction in which water flows in a path from the inflow port 30 to the junction 35 through the ascending flow path 22, the return flow path 32 and the descending flow path 34, which will be described later.

  The accommodating space 23 is disposed at the upper rear end of the bowl 10 in the wash basin body 20 and is opened downward. The exhaust hole 24 is open so that the upper end portion of the housing space 23 and the upper surface of the wash basin body 20 communicate with each other. The communication pipe 31 is accommodated in the accommodation space 23. The communication tube 31 is a component having a substantially L-shape whose side view shape is upside down, and constitutes the overflow channel 13. The inside of the communication pipe 31 is a folded flow path 32. One end of the communication pipe 31 (the return flow path 32) facing forward is connected to the upper end (the downstream end in the overflow direction) of the ascending flow path 22 in a communicating state. The upper end of a curved tube 33 arranged below the outside of the washstand body 20 is connected to the other end (downstream end in the overflow direction) of the communication tube 31 that opens downward.

  The curved tube 33 is a component that constitutes the overflow channel 13. The internal space of the curved tube 33 is a descending flow path 34. The upper end (the upstream end in the overflow direction) of the descending flow path 34 is connected to the lower end (the downstream end in the overflow direction) of the return flow path 32 in a communicating state. A lower end (downstream end in the overflow direction) of the descending flow path 34 is a junction 35 located below the inflow port 30 and the valve seat 29. The junction 35 is connected to the drain pipe 25 while communicating with the drain channel 12 (the shortest drain channel 18).

  The float valve 36 is housed in the housing space 23 and attached to the upper surface of the communication pipe 31. The float valve 36 includes a valve chamber 37, a spherical valve element 38 housed in the valve chamber 37, and having a specific gravity smaller than water, and a folded flow path 32 (overflow flow path 13) formed at the lower end of the valve chamber 37. A lower valve port 39 is provided at the upper end of the valve chamber 37 and can communicate with the housing space 23.

  The drain plug 14 is a component having a circular shape in plan view. The outer diameter of the drain plug 14 is set to a size larger than the minimum inner diameter of the valve seat 29. The lower end of the outer periphery of the drain plug 14 is a tapered valve function portion 41 which can abut against the valve seat 29 in a surface contact state. The drain plug 14 is housed in the drain passage 12 from the drain port 11, and has a valve-closing position where the valve function portion 41 abuts on the valve seat 29 and a valve-open position where the valve function portion 41 is separated upward from the valve seat 29. It can move up and down between. When the drain plug 14 is in the valve closing position, the flow of water or hot water in the drain passage 12 is regulated. In a state where the drain plug 14 is at the valve opening position, the flow of water or hot water in the drain passage 12 is allowed.

  As means for raising and lowering the drain plug 14 between the valve opening position and the valve closing position, a control cable (not shown) provided on the upper surface of the wash basin main body 20 and a lower surface of the drain plug 14 is provided. (Not shown). If the lower surface of the drain plug 14 is pushed up by the upward working end of the control cable, the drain plug 14 can be displaced to the valve opening position. When the operating end of the control cable is retracted downward, the drain plug 14 is lowered to the valve closing position by the weight of the drain plug 14.

  As another means other than the control cable, there is a method in which a permanent magnet (not shown) is integrally attached to the lower surface of the drain plug 14 and a permanent magnet (not shown) is provided on the outer surface of the drain pipe 25. By changing the direction of the permanent magnet on the drain pipe 25 side so that the magnetic force generated between the two permanent magnets is switched between the magnetic attraction force and the magnetic repulsion force, the drain plug 14 is opened and closed. It can be displaced between positions.

  The perforated plate 15 is a single component having a cover portion 42 having a circular plate shape in a plan view, a cylindrical fitting portion 43, and a bottom plate portion 44. The outer diameter of the cover 42 is set to be substantially the same as the maximum inner diameter of the drain port 11. The cylindrical fitting portion 43 extends concentrically from the lower surface of the cover portion 42. The outer diameter of the cylindrical fitting part 43 is smaller than the outer diameter of the cover part 42. The bottom plate portion 44 covers the opening at the lower end of the cylindrical fitting portion 43.

  At the upper end of the tubular fitting portion 43, a plurality (for example, four) of inflow holes 45 penetrating from the outer periphery to the inner periphery of the tubular fitting portion 43 are formed at intervals in the circumferential direction. ing. On the inner periphery of the cylindrical fitting portion 43, a reduced diameter portion 46 having a ring shape concentric with the cylindrical fitting portion 43 in a plan view is formed. The reduced diameter portion 46 protrudes radially inward from the position along the lower end edge of the inflow hole 45 in the cylindrical fitting portion 43 over the entire circumference. The central hole of the reduced diameter portion 46 communicates with the upper space 47 facing the inflow hole 45 in the internal space of the cylindrical fitting portion 43 and the lower space 48 facing the peripheral filter 51 and the bottom filter 52 described later. A hole 49 is provided.

  A filter 16 is formed integrally with the perforated plate 15. The filter 16 includes a peripheral filter 51 and a bottom filter 52. The peripheral filter 51 is formed in a region forming the lower space 48 of the cylindrical fitting portion 43, and is configured by a plurality of slits penetrating from the inner peripheral surface to the outer peripheral surface of the cylindrical fitting portion 43. I have. One slit is elongated in the circumferential direction, and the plurality of slits are arranged in the circumferential direction and the vertical direction. The opening width (vertical width) of the slit is sufficiently smaller than the vertical dimension of the inflow hole 45. The bottom filter 52 is composed of a plurality of small holes penetrating from the upper surface to the lower surface of the bottom plate portion 44. The inner diameter of the small hole is substantially the same as the opening width of the slit.

  A backflow prevention member 17 which is a component separate from the perforated plate 15 and which functions as a check valve is attached to the perforated plate 15. The backflow prevention member 17 has a substantially disk shape having a diameter larger than the opening area of the communication hole 49, and is supported by a left-right swing shaft 53 provided on the lower surface of the front end of the reduced diameter portion 46. The backflow prevention member 17 is provided with the swing shaft 53 as a fulcrum, a closed position for separating the upper space 47 and the lower space 48 by closing the communication hole 49 by contacting the lower surface of the reduced diameter portion 46, By opening the communication hole 49 away from the lower side, the upper space 47 and the lower space 48 can swing vertically between an open position where the upper space 47 and the lower space 48 communicate with each other. The backflow prevention member 17 is constantly urged toward the closed position by a torsion coil spring 54 as urging means attached to the swing shaft 53. The backflow prevention member 17 forms a flapper valve.

  The perforated plate 15 is attached to the bowl 10 by fitting the cylindrical fitting portion 43 into the drain pipe 25 from above the drain port 11. When the perforated plate 15 is attached, the cover portion 42 is positioned so as to cover almost the entire drain port 11 from above. The upper end region (upper space 47) of the cylindrical fitting portion 43 where the inflow hole 45 opens is located above the drain pipe 25, and water in the bowl 10 flows from the inflow hole 45 into the upper space 47 (upper space 47). It can flow into the cylindrical fitting part 43).

  The area of the cylindrical fitting portion 43 where the peripheral filter 51 is formed is located so as to cover the entire opening area of the outflow hole 28 of the drain pipe 25. It corresponds to the filter 51. The lower space 48 of the perforated plate 15 communicates with the junction 35 of the overflow channel 13 through the peripheral filter 51, the outflow hole 28, and the communication space 27.

  The bottom plate portion 44 is located below the lower edge of the outflow hole 28 and above the valve seat 29. A space is provided between the bottom plate portion 44 and the valve seat 29 to such an extent that the drain plug 14 does not prevent the valve opening operation of moving upward from the valve seat 29. The bottom plate portion 44 (the bottom filter 52) is disposed so as to partition the drainage channel 12 (the shortest drainage channel 18) into an upstream side in the drainage direction and a downstream side in the drainage direction. A region of the drainage channel 12 below the bottom plate portion 44 (a space in which the drain plug 14 is accommodated) communicates with a lower space 48 of the perforated plate 15 via a bottom filter 52.

  During normal use, as shown by the imaginary line in FIG. 2, the drain plug 14 is held at the valve open position, and the valve function unit 41 is separated from the valve seat 29 above. In this state, the water or hot water in the bowl 10 passes through the drain port 11 and the inflow hole 45 in order, flows into the upper space 47, and swings the backflow prevention member 17 to the open position by water pressure, thereby forming the communication hole. From 49, it flows into the lower space 48, passes through the bottom filter 52, and is further discharged through the shortest drain passage 18 that passes through the gap between the valve seat 29 and the valve function part 41. Foreign matter or the like flowing in the shortest drain passage 18 is captured by the bottom filter 52. Therefore, the bottom filter 52 functions as a hair catcher.

  When storing water or hot water in the bowl 10, the drain plug 14 is lowered from the valve opening position to the valve closing position, and the valve function part 41 is brought into contact with the valve seat 29 as shown by a solid line in FIG. When the drain plug 14 is displaced to the valve closing position, the shortest drain path 18 blocks the flow (discharge) of water or hot water between the inflow port 30 and the junction 35. When water or hot water is supplied into the bowl 10, the water level in the bowl 10 rises, and the water pressure in the bowl 10 lowers the backflow preventing member 17 to the open position, and a part of the water or hot water flows into the overflow channel. 13 into the ascending flow path 22. At this time, the air in the overflow passage 13 is discharged to the outside air via the lower valve port 39, the valve chamber 37, the upper valve port 40, the accommodation space 23, and the exhaust hole 24 of the float valve 36. The water level in the rising channel 22 of the thirteen rises in the same manner as the water level in the bowl 10.

  After the water level in the bowl 10 and the overflow channel 13 reaches the specified water level (upper end of the rising channel 22), excess water flows down the descending channel 34 via the return channel 32, The water flows into the drainage channel 12 from the junction 35 and is discharged. Therefore, water or hot water in the bowl 10 does not overflow from the outer peripheral edge of the upper end of the bowl 10. When the supply flow rate of water or hot water into the bowl 10 is large and the water level in the return flow path 32 reaches the valve chamber 37 of the float valve 36, the valve body 38 rises by buoyancy to close the upper valve port 40. Therefore, the possibility that water or hot water in the overflow channel 13 leaks to the outside of the overflow channel 13 (in the accommodation space 23) is reduced.

  When water or hot water is stored in the bowl 10 and hand washing is performed, a part of the water or hot water in the bowl 10 flows out to the overflow channel 13 side. It is feared that the dirt flows into the overflow channel 13 and the dirt flows in the overflow channel 13. Since the inside of the overflow channel 13, particularly, the inside of the ascending channel 22 integrally formed with the wash basin main body 20, has a narrow and bent hole shape, it is difficult to clean. May be clogged.

  As a countermeasure, in the first embodiment, the peripheral filter 51 of the perforated plate 15 is interposed between the bowl 10 and the overflow channel 13. Thus, the dirt flowing from the bowl 10 into the upper space 47 and the lower space 48 of the perforated plate 15 is captured by the peripheral filter 51 and prevented from reaching the communication space 27 and the inlet 30.

  When water or hot water flows back and forth between the bowl 10 and the overflow channel 13 at the time of hand-washing or the like, the water or hot water is caught by the peripheral filter 51 or the bottom filter 52 and stored in the lower space 48. It is feared that dirt or foreign matter that has entered the bowl 10. As a countermeasure, in the first embodiment, the backflow prevention member 17 urged in the closing direction by the torsion coil spring 54 is provided in the middle of the flow path between the bowl 10 and the overflow channel 13. Thereby, when the water pressure on the overflow channel 13 side is equal to or higher than the water pressure on the bowl 10 side, the backflow prevention member 17 closes the space between the lower space 48 and the upper space 47. Therefore, the possibility that water or hot water in the lower space 48 flows back into the bowl 10 through the upper space 47, the inflow hole 45, and the drain port 11 is reduced.

  The wash basin A of the first embodiment includes a water storage bowl 10 having a drain port 11 opened at the bottom, a drain channel 12 extending downstream from the drain port 11 in the drain direction, and an inflow port branched from the drain channel 12. An overflow flow path 13 having a flow path 30, a drain plug 14 that can shut off the flow of water in the drain path 12 at a position downstream of the inlet 30 in the drain direction, and a drain plug 11 provided between the drain port 11 and the inlet 30. And a filter 16 (peripheral filter 51) that allows the flow of the air. Since the wash basin A of the first embodiment includes the filter 16 (peripheral filter 51), the possibility that foreign matters in the bowl 10 enter the overflow channel 13 is reduced.

  The washstand A is provided with a perforated plate 15 arranged so as to cover the drain port 11, and a peripheral filter 51 is provided on the perforated plate 15. The perforated plate 15 is also provided with a bottom filter 52. According to this configuration, the peripheral filter 51 and the bottom filter 52 can be cleaned and maintained by removing the perforated plate 15 from the drain port 11.

  The bottom filter 52 provided in the perforated plate 15 divides the drainage path (the shortest drainage path 18) that does not pass through the overflow channel 13 into an upstream side in the drainage direction and a downstream side in the drainage direction. According to this configuration, the hair and the like flowing into the drainage channel 12 can be captured by the bottom filter 52 during normal use.

  A backflow prevention member 17 is provided between the drain port 11 and the peripheral filter 51 to allow the flow of water toward the downstream side in the drainage direction and block the flow of water toward the upstream side in the drainage direction. According to this configuration, it is possible to prevent the foreign matter captured by the peripheral filter 51 from entering the bowl 10.

<Example 2>
Next, a second embodiment of the present invention will be described with reference to FIG. The wash basin B of the second embodiment is different from the first embodiment in that the backflow prevention member 62 is different from that of the first embodiment. Other configurations are the same as those in the first embodiment, and thus the same configurations are denoted by the same reference numerals, and description of the structures, operations, and effects is omitted.

  The perforated plate 60 according to the second embodiment is configured such that the diameter between the lower end edge of the inflow hole 45 and the upper end edge of the peripheral filter 51 in the inner periphery of the cylindrical fitting portion 43 is reduced radially inward. A projecting locking projection 61 is formed. The backflow prevention member 62 is made of a material having elasticity such as rubber or elastomer, and is a single member having a cylindrical main body 63 and a beak-shaped elastic valve body 64 in a form called a duckbill valve. A locking groove 65 is formed on the outer periphery of the main body 63.

  The elastic valve body portion 64 protrudes downward from the main body portion 63 and has a tapered downwardly sharp shape in a side view. A slit-like valve port 66 extending in the left-right direction is formed at the lower end (projecting end) of the elastic valve body 64. In a free state in which no external force acts on the elastic valve body portion 64, the valve port 66 is kept in a closed state in which the valve port 66 is closed.

  The backflow prevention member 62 is attached to the inner periphery of the cylindrical fitting portion 43 of the perforated plate 60 by fitting the locking groove 65 to the locking projection 61. When the elastic valve body 64 is closed, the upper space 47 and the lower space 48 of the perforated plate 60 are separated by the backflow prevention member 62. In this state, when the water pressure on the upper space 47 side (bowl 10 side) becomes higher than the water pressure on the lower space 48 side (overflow channel 13 side), the elastic valve body 64 is pushed from above to close the valve port 66. Since it is elastically deformed in the opening direction, the valve is opened. Therefore, a draining operation from the bowl 10 through the shortest drainage path 18 and a flow of water or hot water from the bowl 10 to the overflow channel 13 are allowed.

  When the water pressure on the lower space 48 side (overflow channel 13 side) becomes higher than the water pressure on the upper space 47 side (bowl 10 side) in a state where the elastic valve body 64 is closed, the elastic valve body 64 is closed. Since it is pushed in the direction to close the valve port 66, the elastic valve body portion 64 keeps the valve closed state. Therefore, the possibility that water or hot water in the lower space 48 or the overflow channel 13 flows into the bowl (the upper space 47 side) is reduced.

<Example 3>
Next, a third embodiment of the present invention will be described with reference to FIG. The wash basin C of the third embodiment is different from the first embodiment in that the perforated plate 70, the drain plug 72, and the filter 80 are different from those of the first embodiment. Other configurations are the same as those in the first embodiment, and thus the same configurations are denoted by the same reference numerals, and description of the structures, operations, and effects is omitted.

  In the first embodiment, the filter 16 is formed integrally with the eye plate 15, whereas in the third embodiment, the filter 80 is formed integrally with the drain plug 72. In the perforated plate 70 of the third embodiment, the vertical dimension (dimension in the direction parallel to the drainage direction) of the cylindrical fitting portion 71 is smaller than the cylindrical fitting portion 43 of the perforated plate 15 of the first embodiment. When the perforated plate 70 is attached to the bowl 10 (drain port 11), the lower end of the cylindrical fitting portion 71 is located above the outflow hole 28 of the drain pipe 25.

  The drain plug 72 is a single member having a plug main body 73, a capturing part 76, and a plurality of support parts 83. The plug main body 73 has a circular plate shape in plan view. The outer diameter of the plug main body 73 is set to be larger than the minimum inner diameter of the valve seat 29 and smaller than the inner diameter of the fitting space 74 of the drainage channel 12 above the valve seat 29. The lower end of the outer periphery of the plug main body 73 is a tapered valve function portion 75 that can abut against the valve seat 29 in a surface contact state.

  The capturing portion 76 includes a cylindrical peripheral wall 77 concentric with the plug main body 73 and a bottom wall 78 that closes an opening on the lower surface of the peripheral wall 77. The outer diameter of the capturing portion 76 (peripheral wall portion 77) is substantially the same as the inner diameter of the fitting space 74. The internal space of the capturing section 76 is a capturing space 79 whose upper surface is open throughout.

  The filter 80 includes a peripheral filter 81 and a bottom filter 82. A peripheral filter 81 is formed integrally with the peripheral wall portion 77. The peripheral filter 81 is constituted by a plurality of slits penetrating from the inner peripheral surface of the peripheral wall portion 77 to the outer peripheral surface. One slit is elongated in the circumferential direction, and the plurality of slits are arranged in the circumferential direction and the vertical direction. The opening width (vertical width) of the slit is sufficiently smaller than the vertical dimension of the inflow hole.

  The bottom wall 78 is parallel to the horizontal upper surface of the plug main body 73. A bottom filter 82 is formed integrally with the bottom wall 78. The bottom filter 82 is composed of a plurality of small holes penetrating from the upper surface to the lower surface of the bottom wall portion 78. The inner diameter of the small hole is substantially the same as the opening width of the slit.

  The plurality of support portions 83 rise upward from the outer peripheral edge of the upper surface of the plug main body portion 73 at intervals in the circumferential direction. The outer peripheral edge of the lower surface of the bottom wall portion 78 continues to the upper ends of the plurality of support portions 83. That is, the capturing unit 76 is supported in a state where the capturing unit 76 is placed on the plug main body 73 via the plurality of support units 83. A flat communication chamber 84 is formed between the upper surface of the plug body 73 and the lower surface of the bottom wall 78. The upper surface of the communication chamber 84 communicates with the capture space 79 via the bottom filter 82, and the outer peripheral surface of the communication chamber 84 is open to the outer peripheral surface of the drain plug 72.

  The drain plug 72 is housed in the drain channel 12 (fitting space 74) from the drain port 11, and a valve closing position at which the valve function part 75 is brought into contact with the valve seat 29, and the valve function part 75 is moved from the valve seat 29. The valve can be moved up and down between a valve opening position to be separated upward. When the drain cock 72 is in the valve closing position, the flow of water or hot water in the drain passage 12 is regulated. In a state where the drain plug 72 is at the valve open position, the flow of water or hot water in the drain passage 12 is allowed.

  As means for raising and lowering the drain cock 72 between the valve opening position and the valve closing position, a control cable (not shown) provided on the upper surface of the sink C main body and a lower surface of the drain cock 72 are provided. (Not shown). If the lower surface of the drain plug 72 is pushed up by the upward working end of the control cable, the drain plug 72 can be displaced to the valve opening position. When the operating end of the control cable is retracted downward, the drain plug 72 is lowered to the valve closing position by its own weight.

  As another means other than the control cable, there is a method in which a permanent magnet (not shown) is integrally attached to the lower surface of the drain plug 72, and a permanent magnet (not shown) is provided on the outer surface of the drain pipe 25. By changing the direction of the permanent magnet on the drain pipe 25 side so that the magnetic force generated between the two permanent magnets is switched between a magnetic attraction force and a magnetic repulsion force, the drain plug 72 is opened and closed. It can be displaced between positions.

  Regardless of whether the drain plug 72 is in the valve-opening position or the valve-closing position, the upper end of the catching portion 76 is located above the upper end of the outflow hole 28, and the bottom wall portion 78 is located below the lower edge of the outflow hole 28. Is also located below. Therefore, the entire opening area of the outflow hole 28 is covered by the peripheral wall portion 77 from the inner peripheral side regardless of whether the drain plug 72 is at the valve opening position or the valve closing position. Correspond to the opening area of the outflow hole 28. Therefore, the trapping space 79 and the overflow channel 13 communicate with each other via the peripheral filter 81.

  The bottom wall portion 78 (bottom filter 82) is arranged to partition the drainage channel 12 (shortest drainage channel 18) into an upstream side in the drainage direction and a downstream side in the drainage direction. In a state where the drain plug 72 is in the valve open position, the trapping space 79 includes the bottom filter 82, the communication chamber 84, the space between the outer circumference of the plug main body 73 and the inner circumference of the drain pipe 25, and the plug main body. By interposing a gap between the outer surface (valve function portion 75) of 73 and the valve seat 29, the drainage channel 12 communicates with a region downstream of the valve seat 29 in the drainage direction.

  The perforated plate 70 is attached to the bowl 10 by fitting the cylindrical fitting portion 71 into the drain pipe 25 (fitting space 74) from above the drain port 11. When the perforated plate 70 is attached, the cover portion 42 is positioned so as to cover almost the entire drain port 11 from above. The cylindrical fitting portion 71 is located above the upper end of the catching portion 76 of the drain plug 72. The inflow hole 45 is located above the drain pipe 25, and the water in the bowl 10 can flow into the cylindrical fitting portion 71 from the inflow hole 45.

  During normal use, the drain plug 72 is held at the valve open position, and the valve function unit 75 is separated from the valve seat 29 above. In this state, the water or hot water in the bowl 10 is discharged from the drain port 11 and the inflow hole 45, the trapping space 79, the communication chamber 84, the gap between the outer circumference of the plug body 73 and the inner circumference of the drain pipe 25, and the valve function part 75. Is discharged through the shortest drain passage 18 that passes through the gap between the valve seat 29 and the valve seat 29 in order. Foreign matter and the like flowing in the shortest drain passage 18 are captured by the bottom filter 82. Therefore, the bottom filter 82 functions as a hair catcher.

  When storing water or hot water in the bowl 10, the drain plug 72 is lowered from the valve opening position to the valve closing position, and the shortest drain path 18 is blocked between the inlet 30 and the junction 35. When water or hot water is supplied into the bowl 10, the water level in the bowl 10 and the water level in the overflow channel 13 rise. After the water level in the bowl 10 and the overflow channel 13 reaches the specified water level (upper end of the rising channel 22), excess water flows down the descending channel 34 via the return channel 32, The water flows into the drainage channel 12 (the shortest drainage channel 18) from the junction 35 and is discharged.

  When water or hot water is stored in the bowl 10 and hand washing is performed, a part of the water or hot water in the bowl 10 flows out to the overflow channel 13 side. There is a concern that the dirt may flow into the overflow channel 13 side. As a countermeasure, a peripheral filter 81 of the drain plug 72 is interposed between the bowl 10 and the overflow channel 13. As a result, the dirt that has flowed from the bowl 10 into the trapping space 79 after passing through the perforated plate 70 is trapped by the peripheral filter 81 and is prevented from reaching the communication space 27 and the inlet 30 (the overflow channel 13). Have been.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and the drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the first to third embodiments, the drainage channel is formed by a tubular member. However, the drainage channel may be formed by perforating a member integrally formed with the bowl.
(2) In the first to third embodiments, the drainage channel linearly extends vertically downward from the drainage outlet, but the drainage channel extends linearly obliquely to the vertical direction. Alternatively, it may be a form that extends along a curved path.
(3) In the first to third embodiments, the upflow channel rising from the inflow port in the overflow channel is formed integrally with the bowl, and the downflow from the upper end of the upflow channel to the junction in the overflow channel. Although the passage is formed as a part separate from the bowl, the entire overflow passage may be formed integrally with the bowl, or the entire overflow passage may be formed as a part separate from the bowl.
(4) In Examples 1 to 3, although the overflow channel has a junction communicating with the drain pipe, the downstream end of the overflow channel does not communicate with the drain pipe and is different from the drain pipe. It may be connected to the sewer by a route.
(5) In the first and second embodiments, the filter is formed integrally with the eye plate. However, the filter may be a separate component from the eye plate.
(6) In the third embodiment, the filter is formed integrally with the drain plug. However, the filter may be a separate component from the drain plug.
(7) In the first and second embodiments, the filter also has a function as a hair catcher that partitions the drainage path that does not pass through the overflow flow path into an upstream side and a downstream side. The form which does not have a function may be sufficient.
(8) In the third embodiment, a backflow prevention member as in the first and second embodiments may be provided.

A, B, B ... wash basin 10 ... bowl 11 ... drain port 12 ... drain channel 13 ... overflow channel 14, 72 ... drain plug 15, 60, 70 ... eye plate 16, 80 ... filter 17, 62 ... backflow prevention member 30 ... Inlet

Claims (5)

A bowl with a drain opening at the bottom,
A drainage channel extending from the drainage port to a drainage direction downstream side,
An overflow channel having an inlet branched from the drainage channel,
A drain plug that can shut off the flow of water in the drainage channel on the downstream side in the drainage direction from the inlet,
A washstand comprising: a filter provided between the drain port and the inflow port. It has a perforated plate arranged to cover the drain port,
The wash basin according to claim 1, wherein the filter is provided on the eye plate.   The wash basin according to claim 1, wherein the filter is provided on the drain plug.   The wash basin according to any one of claims 1 to 3, wherein the filter partitions a drainage path that does not pass through the overflow flow path into an upstream side and a downstream side.   A backflow prevention member is provided between the drainage port and the filter, and allows a flow of water toward a downstream side in the drainage direction and blocks a flow of water toward an upstream side in the drainage direction. The wash basin according to any one of claims 1 to 4.

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