JP2020045695A - Wash stand and method for cleaning overflow channel - Google Patents

Abstract

To prevent a floor from being wet by water leaking from an overflow channel.SOLUTION: A wash stand 10 comprises a bowl part 12 having a drain port 22 on a bottom part 17, a drain valve 37 capable of blocking the downstream side of the drain port 22, and an overflow channel 15. The overflow channel 15 has an overflow inlet 27 on the downstream side of the drain port 22 and the upstream side of the drain valve 37 and has an overflow outlet 47 on the downstream side of the drain valve 37. The wash stand 10 is provided with a communication port 52 in a position communicating with the overflow channel 15 and enabling water to flow into the bowl part 12.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a wash basin and a method for cleaning an overflow channel provided in the wash basin.

  The drainage structure disclosed in Patent Literature 1 has a washbasin having a drainage port at the bottom, a blocking valve disposed downstream of the drainage port, and an overflow drainage port upstream of the blocking valve and downstream of the blocking valve. And an overflow pipe having an overflow junction. The overflow pipe has a folded portion at an upper end, and has a shape that bends and extends from the overflow drain to the overflow junction.

  When the closing valve is closed, the water that has flowed out of the drain port flows into the overflow pipe from the overflow drain port, flows downstream through the folded portion, and is further discharged downstream from the overflow junction. A self-sealing trap is arranged downstream of the overflow channel, and when the pressure in the self-sealing trap reaches a certain value, the main body of the self-sealing trap is opened and water is discharged to the sewage side. The air trap that may be formed in the overflow pipe is discharged by opening the self-sealing trap.

JP 2011-117229 A

  By the way, a self-sealing trap is not provided in the drainage structure of a general wash basin, and a watertight trap pipe is provided on the downstream side. The overflow pipe provided with the trap pipe is provided with a vent at a folded portion or the like, so that the air pool in the overflow pipe is discharged to the outside from the vent.

  However, when water flows vigorously into the overflow pipe from the overflow drain port and the flow rate on the upstream side in the overflow pipe exceeds the flow rate on the downstream side, there is a concern that water leaks out from the ventilation port to the outside. If the water leaks from the vent, there is a problem that the water splatters into the cabinet of the wash basin and the floor gets wet.

  The present invention has been completed based on the above circumstances, and has as its object to prevent the floor from getting wet with water leaking from the overflow channel.

  The wash basin according to the present invention includes a bowl portion having a drain port at the bottom, a drain plug capable of closing the downstream side of the drain port, and an overflow channel. The overflow channel has an overflow inlet downstream of the drain port and upstream of the drain plug, and has an overflow outlet downstream of the drain plug, and is located above the drain port and below the upper end of the bowl portion. And an overflow inlet from the overflow inlet to the overflow outlet via the flow path portion. The wash basin is characterized in that it is provided with a communication port at a position that communicates with the overflow channel and allows water to flow into the bowl portion.

  If the water flows vigorously into the overflow channel, the water may leak from the communication port.In the case of the present invention, the water that has flowed out of the communication port can flow into the bowl portion. Can prevent the floor from getting wet.

FIG. 3 is a sectional view of a drainage structure in a cabinet in the wash basin according to the first embodiment of the present invention. It is sectional drawing of a washstand. FIG. 9 is a schematic view of an operation unit inserted into a communication port and a peripheral portion of the operation unit in the wash basin of the second embodiment. FIG. 4 is a schematic diagram of an operation unit linked to the operation unit of FIG. 3 and a peripheral portion thereof. It is the schematic of the faucet which fractured | ruptured the housing | casing provided with the communication port in the washstand of Example 3. It is the schematic of the drainage structure which provided the opening-and-closing valve in the drainage pipe in the washstand of Example 4. FIG. 16 is a schematic diagram illustrating a state where an upstream portion of an overflow channel is cleaned by a cleaning member in the wash basin according to the fifth embodiment. FIG. 18 is a schematic diagram illustrating a state where the downstream part of the overflow channel is cleaned by the cleaning member in the wash basin according to the sixth embodiment. FIG. 18 is a schematic view of a drainage structure including a water supply unit for sending water to an overflow channel in the wash basin according to the seventh embodiment.

Preferred embodiments of the present invention will be described below.
(1) A communication port is provided on a slope portion which is inclined down toward the inside of the bowl portion. According to this, the water that has flowed out of the communication port flows along the slope and can reach the inside of the bowl.
(2) A wall portion for damping water is provided at a position opposite to the inside of the bowl portion with respect to the communication port. According to this, the water that has flowed out of the communication port is blocked by the wall, and can be prevented from falling to the floor.
(3) A communication port is provided in the housing of the faucet for discharging water into the bowl portion. According to this, the communication port can be made less noticeable.
(4) An on-off valve is provided downstream of the overflow channel. According to this, the downstream side of the overflow channel is closed by the on-off valve, and water can be stored in the overflow channel to perform cleaning or the like.
(5) A cleaning member for cleaning the overflow channel is inserted into the communication port. By using the communication port in this way, the overflow channel can be cleaned. Further, since the cleaning member is always installed in the communication port, it is not necessary to prepare a cleaning member every time the overflow channel is cleaned, so that the cleaning efficiency can be improved.
(6) A water supply unit is provided for feeding water to the overflow flow passage in a separate path from water supply by drainage from inside the bowl unit. According to this, for example, when cleaning the overflow channel, a predetermined amount of water can be forcibly sent into the overflow channel.
(7) An operation unit for remotely controlling the opening and closing of the drain plug is provided, and the operation unit is inserted into the communication port. According to this, the operation unit can be installed using the communication port. Further, the communication port can be made less noticeable.
(8) A method of cleaning an overflow channel provided in the wash basin, wherein at least one of a cleaning member, a cleaning agent, and water is introduced into the overflow channel through a communication port, and the overflow channel is cleaned. It is. The overflow passage has an overflow entrance on the downstream side of the drain port, so that the design is good, but there is a problem that it is difficult for the user to access and the cleaning is difficult. In this regard, according to the above method, the overflow channel can be reliably cleaned by using the communication port.
(9) A method for cleaning an overflow channel provided in a wash basin according to the above (6), wherein at least one of a cleaning member, a cleaning agent, and water is introduced into the overflow channel through a communication port; The water is supplied from the water supply unit to the overflow channel to clean the overflow channel. According to this, it is possible to reliably supply the overflow flow path with the amount of water and the flow rate necessary for cleaning.

<Example 1>
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the wash basin 10 according to the first embodiment includes a bowl 12 installed on a cabinet 11, a drain pipe 13 connected to the bowl 12, and a drain passage 14 in the drain pipe 13. And an overflow channel 15 that merges.

  The bowl portion 12 is a ceramic washbasin having a concave bowl surface 16, a bottom portion 17 provided on a lower surface side of the bowl surface 16, and a back portion 18 provided on a rear surface side of the bowl surface 16. The peripheral edge of the upper end opening of the bowl surface 16 has a back portion 19 on the rear side, and a faucet 21 is provided in the back portion 19. Water coming out of the faucet 21 is received on the bowl surface 16.

  As shown in FIG. 2, the bowl portion 12 has a drain port 22 at a substantially central portion of the bottom portion 17, and has a cylindrical portion 23 protruding downward from a peripheral edge of the drain port 22. The inner peripheral surface of the cylindrical portion 23 forms an expanding surface portion 24 whose diameter gradually increases toward the drain port 22.

  The bowl portion 12 has an overflow upstream pipe portion 25 which swells and is integrally formed with an outer surface region extending from the rear surface side of the cylindrical portion 23 to the bottom portion 17 and the back portion 18. The inside of the overflow upstream pipe portion 25 constitutes an upstream portion 26 of the overflow channel 15. The upstream portion 26 has, at the front end, an overflow inlet 27 that penetrates the rear surface of the cylindrical portion 23 and faces the drainage pipe 13, and the upper end is closed by the back portion 19. The overflow upstream pipe section 25 is provided with a branch connection port 28 on the rear surface side near the upper end. The upstream portion 26 of the overflow channel 15 communicates with a downstream portion 29 of the overflow channel 15 via a branch connection port 28.

  The drainage pipe 13 is formed in a tubular shape extending in the up-down direction, has a flange portion 31 projecting over the entire periphery at an upper end, and a screw portion 32 is provided on an outer peripheral surface near the upper end. The lower end of the drainage pipe 13 is connected to a trap-type trap pipe 33 (see FIG. 1) which is bent in a substantially S-shape.

  The drainage pipe 13 is inserted into the cylindrical portion 23 from above. The flange portion 31 is hung on the expanding surface portion 24 of the bowl portion 12 while being inserted into the cylindrical portion 23. An annular nut 34 is screwed into the screw portion 32. The nut 34 comes into contact with the lower end of the cylindrical portion 23 by being tightened to the screw portion 32. The drainage pipe 13 is attached and fixed to the bowl part 12 by the state where the cylindrical part 23 is sandwiched between the nut 34 and the flange part 31.

  The drainage pipe 13 has an opening 35 between the flange 31 and the screw 32. A plurality of openings 35 are provided in the circumferential direction, and communicate with the overflow channel 15 via the overflow inlet 27.

  The drainage pipe 13 has a radially thick portion at a height position overlapping with the screw portion 32, and has a stepped seat portion 36 along the radial direction at the upper end of the inner periphery of the thick portion. I have. A drain plug 37 is supported on the seat 36 so as to be separated therefrom.

  The drain plug 37 is a disc-shaped lid member, and closes the drain flow path 14 of the drain pipe 13 on the downstream side of the drain port 22 by contacting the seat 36. When the drain plug 37 is in the closed state, the water flowing out of the drain port 22 flows into the overflow channel 15 from the overflow inlet 27. On the other hand, when the drain plug 37 is in the open state separated from the seat 36, the water that has flowed out of the drain port 22 flows directly downward through the drain passage 14 of the drain pipe 13.

  The drain plug 37 has a shaft 38 extending vertically extending through the center thereof. The shaft member 38 has a drain plug 37 attached to an upper and lower middle portion, a perforated plate 39 attached to an upper end portion, and a hair catcher 41 attached to a lower end portion. The perforated plate 39 has a structure that covers the drain port 22 and allows water to pass through the drain port 22 through an opening on the side surface. The hair catcher 41 is located downstream of a merging connection port 42 described later, and has a structure capable of collecting hair and the like while allowing water to pass therethrough.

  The drainage pipe 13 is provided with a junction 42 on the rear side below the screw portion 32. The drain passage 14 in the drain pipe 13 communicates with an outlet (an overflow outlet 47 to be described later) of the downstream portion 29 of the overflow passage 15 through a junction 42.

  The downstream portion 29 of the overflow channel 15 is formed in an overflow pipe 43 which is a member separate from the bowl portion 12. The overflow pipe 43 has a first joint pipe 44 connected to the inner peripheral part of the branch connection port 28, a second joint pipe 45 connected to the inner peripheral part of the junction connection port 42, and a first joint pipe whose upper end is the first joint pipe. An overflow pipe main body 46 is fitted and connected to a lower side of the lower pipe 44, a lower end front part is fitted and connected to a rear side of the second joint pipe 45, and extends downwardly from the upper end part to the lower front part. , Consisting of The downstream portion 29 of the overflow channel 15 has an overflow outlet 47 at a position facing the junction 42.

  When viewed as a whole, the overflow channel 15 has a substantially U-shaped folded shape, the upstream portion 26 extends rearward from the overflow inlet 27 along the bottom portion 17 and then rises along the back portion 18, and the downstream portion 29 branches off. It has a flow path portion extending rearward from the connection port 28, is folded downward from the flow path part, and an overflow outlet 47 is located at the folded end so as to join the drain flow path 14 of the drain pipe 13. Be composed.

  The whole of the second joint pipe 45 is configured to extend in the front-rear direction. The first joint pipe 44 includes a straight pipe part 48 extending in the front-rear direction, an elbow-shaped part 49 bent downward from the rear end side of the straight pipe part 48, and a communicating pipe branched from the upper surface of the straight pipe part 48 and rising. A part 51. The straight pipe part 48 is located above the bottom part 17 and below the back part 19, and constitutes the upper surface part of the folded part of the overflow channel 15.

  The communication pipe portion 51 has an upper end portion that penetrates the back portion 19 and has a communication port 52 that opens to the upper surface of the back portion 19. The inside of the communication pipe portion 51 is formed as a communication passage 53 as a branch portion of the overflow channel 15, and is opened to the atmosphere through a communication port 52. The communication pipe part 51 has a bent part 54 in the middle. The bent portion 54 is arranged along a direction intersecting with the rising direction of the communication pipe portion 51, and can regulate the rise of water from the straight pipe portion 48 by applying water to the inner wall upper surface.

  The upper surface of the back portion 19 where the communication port 52 opens forms a slope portion 55 that is gradually inclined toward the inside of the bowl portion 12 (the bowl surface 16). In the back part 19, a wall part 56 having a front wall is provided upright on the rear end side of the slope part 55. The wall portion 56 is in contact with the back plate portion of the cabinet 11 on the rear side (see FIG. 1).

The structure of the wash basin 10 according to the first embodiment is as described above. Next, the flow of drainage will be described.
When the drain plug 37 is separated from the seat 36 and the drain channel 14 of the drain pipe 13 is not closed, the water generated in the bowl portion 12 passes through the overflow channel 15 from the drain port 22. Without flowing down, the water flows down the drain pipe 13 and further passes through the trap pipe 33 to be discharged to the sewage side. Water accumulates in the bent portion of the trap pipe 33 to form sealed water.

  On the other hand, when the drain plug 37 is in contact with the seat 36 and the flow of the drain pipe 13 in the drain passage 14 in the downward direction is prevented, the water generated in the bowl portion 12 flows from the drain port 22 to the overflow inlet. It flows into the overflow channel 15 through 27. The water that has flowed into the overflow channel 15 rises in the upstream portion 26 of the overflow channel 15 in accordance with the level of the water stored in the bowl portion 12. Further, the water can flow into the downstream portion 29 of the overflow channel 15 through the branch connection port 28 and can flow through the downstream portion 29 along the lower end of the inner periphery of the straight pipe portion 48 of the first joint pipe 44.

  An air pocket that can be formed between the water flowing into the upstream portion 26 of the overflow channel 15 and the sealed portion in the trap pipe 33 is discharged to the outside from the communication port 52. In this way, while the overflow channel 15 is opened to the atmosphere and maintained at substantially the atmospheric pressure, the water smoothly flows from the upstream portion 26 to the downstream portion 29, and further flows from the downstream portion 29 to the drainage pipe 13 through the overflow outlet 47. The water is merged into the drain passage 14 and finally drained to sewage.

  The height position of the inner pipe lower end of the straight pipe section 48 in the overflow pipe 43 corresponds to the maximum water level W1 (see FIG. 1) set in the bowl section 12. The maximum water level W1 in the bowl portion 12 indicates the maximum water level that is assumed to be used, and is set below the upper end of the bowl portion 12. Water can be stored in the bowl portion 12 up to the maximum water level W1, and the bowl portion 12 can be washed, face-washed, and hand-washed.

  By the way, when the water flows vigorously into the upstream portion 26 of the overflow channel 15 and the drainage speed is accelerated, the water fills the inside of the straight pipe portion 48 and flows through the communication passage 53 in the communication pipe portion 51. It rises and is further discharged outside from the communication port 52 of the communication pipe part 51. The water that has flowed out of the communication port 52 flows forward along the slope portion 55, and falls into the bowl portion 12 from the front end of the slope portion 55. Even if the water flows backward from the communication port 52 backward, the water hits the front wall of the wall portion 56 and returns to the slope portion 55 side, so that it can reach the inside of the bowl portion 12 as described above. Therefore, it is possible to prevent the water coming out of the communication port 52 from dropping on the floor.

  As described above, according to the first embodiment, it is possible that the communication port 52 is higher than the maximum water level W1 in the bowl portion 12 and that the slope portion 55 and the wall portion 56 allow water to flow into the bowl portion 12. Since it is provided at a possible position, even if water vigorously flows into the overflow channel 15 and leaks out from the communication port 52, the leaked water can flow into the bowl portion 12 from the slope portion 55. As a result, it is possible to prevent the wall and floor of the cabinet 11 from getting wet with water. Furthermore, since the slope portion 55 and the wall portion 56 as means for preventing water from dropping to the floor can be provided without any major design change from the existing structure, the cost can be reduced. it can.

<Example 2>
3 and 4 show a second embodiment of the present invention. The second embodiment differs from the first embodiment in that an operation unit 61 for remotely controlling the opening and closing of the drain plug 37 is inserted into the communication port 52A. Other configurations are the same as those in the first embodiment, and therefore, the same description as that in the first embodiment will be omitted below.

  As shown in FIG. 3, the operation unit 61 is a bar-shaped member that extends in the up-down direction, and has a knob 62 that expands upward at the upper end and an end of the release wire 63 at the lower end. Is connected. The user can push and pull the operation unit 61 while holding the knob 62.

  The bowl part 12 is provided with a mounting hole 64 that penetrates in the up-down direction and opens to the slope part 55 in the back part 19. A substantially cylindrical operating portion housing 65 is fitted and inserted into the mounting hole 64. The operation portion housing 65 has a flange portion 66 that protrudes in the radial direction at an upper end portion. The flange 66 is hooked on the opening edge of the mounting hole 64 on the upper surface of the slope 55. The operation portion housing body 65 has an outer peripheral screw portion 67 on the outer periphery of the lower end portion, and has an inner peripheral screw portion 68 on the inner periphery of the lower end portion. The operation part container 65 is attached and fixed to the inner part 19 by fastening the fixing nut 69 to the outer peripheral screw part 67 and sandwiching the inner part 19 between the fixing nut 69 and the flange part 66. The upper end opening of the operation unit housing 65 forms a communication port 52A.

  The overflow pipe 43 forming the downstream portion 29 of the overflow channel 15 has a communication pipe portion 51A between the overflow pipe 43 and the operation section 61. The communication pipe portion 51A branches off from the straight pipe portion 48 and is arranged alongside the release wire 63, an insertion pipe portion 72 through which the release wire 63 is inserted, and a base pipe portion 72. And a connecting pipe portion 73 connecting the end pipe portion 71 to the end pipe portion 71. In FIG. 3, the overflow pipe 43, the proximal end pipe part 71, the connecting pipe part 73, and the insertion pipe part 72 are shown in a simplified manner.

  The upper end of the insertion tube portion 72 is inserted into the operation portion housing 65 and is stopped by the packing 74 held in the operation portion housing 65. Between the insertion tube portion 72 and the operation portion housing 65, a cylindrical spacer 75 screwed to the inner peripheral thread portion 68 is provided. The insertion tube section 72 is held by the operation section housing 65 via the spacer 75. The insertion tube portion 72 is provided at the lower end thereof with a check valve 76 through which the release wire 63 can be slid up and down and inserted in a liquid-tight manner.

  The overflow channel 15 has a communication path 53A from the inside of the communication pipe section 51A to the communication port 52A via the inside of the operation section housing 65. The check valve 76 prevents water flowing through the communication passage 53A from being discharged in a direction opposite to the communication port 52A.

  The release wire 63 is a member that transmits the operation force of the operation unit 61, and as shown in FIG. 4, penetrates a side portion of the drainage pipe 13 at an end opposite to the operation unit 61 to drain water. An operating portion 77 facing the flow path 14 is provided. The operating portion 77 is supported by a support 78 fixed in the drainage pipe 13 so as to be able to advance and retreat, and is capable of pushing the lower surface of the hair catcher 41 or the lower end of the shaft member 38.

  The operating portion 77 has a rod shape, and moves up and down in the drainage pipe 13 in conjunction with the push-pull operation of the operating portion 61. When the operating portion 77 rises, the drain plug 37 is pushed by the operating portion 77 and rises to be separated from the seat portion 36 to be in a valve-open state. On the other hand, when the operating portion 77 is lowered, the drain plug 37 is lowered by at least one of its own weight and the elasticity of an elastic member (not shown) and comes into contact with the seat portion 36 to be in a valve closed state. In addition, the remote control method of the drain cock 37 by the operation part 61 and the structure of the operation part 77 side can employ | adopt a well-known method, and are not limited to the above. For example, the operating unit 77 may directly contact the drain plug 37 to open and close the drain plug 37.

  As shown in FIG. 3, the operation unit 61 is loosely inserted into the operation unit housing 65, and a ventilation is provided between the operation unit 61 and the operation unit housing 65 so that the overflow channel 15 can be opened to the atmosphere. The part is secured. Therefore, the water that has flowed out of the communication port 52A through the communication path 53A can flow along the slope 55 and reach the bowl 12 as in the first embodiment.

  In the case of the second embodiment, the operation portion housing 65 is fitted into the mounting hole 64 of the back portion 19, and the knob portion 62 of the operation portion 61 is disposed so as to cover the upper portion of the communication hole 52A. 52A is hidden behind the knob 62 when viewed from above, and becomes invisible. For this reason, the design of the cabinet 11 is not impaired by the communication port 52A, and the appearance can be improved.

<Example 3>
FIG. 5 shows a third embodiment of the present invention. The third embodiment is different from the first embodiment in that a communication port 52 </ b> B is provided in a housing 79 forming an outer shell of the faucet 21. Other configurations are the same as those in the first embodiment, and therefore, the same description as in the first embodiment will be omitted below.

  The overflow pipe 43 has a communicating pipe part 51B that branches off from the upper surface side of the straight pipe part 48 and rises, and an upper end part penetrates the inner part 19 and faces the housing 79 of the faucet 21. The communication pipe portion 51B has a bent portion 54 as in the first embodiment, and further has a connecting portion 81 at the upper end portion bent rearward and connected to the rear surface portion of the housing 79. The housing 79 is provided with a fitting hole 82 for fitting and holding the connection portion 81 on a rear surface portion. The inside of the communication pipe portion 51B is formed as a communication passage 53B as a branch of the overflow flow path 15, and has a communication port 52B on the lower end side of the rear surface of the housing 79.

  Here, the water that has flowed into the communication path 53B from the overflow flow path 15 is discharged to the outside from the communication port 52B of the housing 79, and the discharged water flows along the slope portion 55, and may reach the inside of the bowl portion 12. it can. In the case of the third embodiment, since the communication port 52B is provided in the housing 79 of the faucet 21, the communication port 52B can be made less noticeable. In addition, since the communication port 52B is provided on the rear surface of the housing 79, it is difficult for the user to enter the field of view, and the appearance is less likely to be impaired.

<Example 4>
FIG. 6 shows a fourth embodiment of the present invention. The fourth embodiment has an on-off valve 83 that can open and close the drain passage 14 in the drain pipe 13 on the downstream side of the overflow passage 15, and can clean the overflow passage 15 with the on-off valve 83 closed. I can do it. Other structures are the same as those of the first embodiment.

  The drainage pipe 13 has a seating portion 84 projecting inward below the junction 42, and a support member 85 is attached and fixed below the seating portion 84. The on-off valve 83 has a valve body 86 that is separated from and seated on a seat portion 84 and a guide shaft 87 that projects from the valve body 86. The guide shaft 87 is connected to a lower end of the release wire 63C. The upper end of the release wire 63C is connected to an operation unit 61C installed in the back part 19. The opening / closing valve 83 is interlocked with the push / pull operation of the operation unit 61C via the release wire 63C. When the valve body 86 comes into contact with the seat portion 84, the drain passage 14 is closed and closed, and when the valve body 86 separates from the seat portion 84, the drain passage 14 is opened and opened. Note that the open / close valve 83 can adopt a known structure, and is not limited to the above structure.

  When cleaning the overflow channel 15, for example, a cleaning agent, preferably a liquid cleaning agent for pipe cleaning, is introduced into the overflow channel 15 from the communication port 52, and the opening / closing valve 83 is closed, and the overflow channel 15 is closed. The path 15 is filled with water. The on-off valve 83 is opened in a state where the predetermined time has elapsed and the dirt in the overflow channel 15 has been removed from the inner wall. Thereby, the dirt in the overflow channel 15 can be discharged to the sewage side together with the water.

<Example 5>
FIG. 7 shows a fifth embodiment of the present invention. In the fifth embodiment, the formation position of the communication port 52D is different from that of the first embodiment, and the overflow member 15 can be cleaned by inserting the cleaning member 88 into the overflow channel 15 from the communication port 52D. . Other structures are the same as those of the first embodiment.

  The communication port 52 </ b> D is provided in the front side portion 89 of the back portion 19 that closes the upper end of the overflow upstream pipe portion 25, and opens at a position near the front end of the slope portion 55. For this reason, the communication port 52D directly communicates with the upstream portion 26 of the overflow channel 15 without passing through the communication pipe.

  When cleaning the upstream portion 26 of the overflow channel 15, a cleaning member 88 is inserted from the communication port 52D. The cleaning member 88 is a cleaning brush, and is configured by implanting a large number of brush bristles 92 on a core member extending from the grip portion 91. The grip 91 has a structure that can be gripped by a user. Each of the brush bristles 92 is inserted into the upstream section 26 of the overflow channel 15 and has a structure capable of contacting the inner wall of the overflow upstream pipe section 25.

  When cleaning the upstream portion 26 of the overflow channel 15, the brush bristles 92 of the cleaning member 88 are inserted into the upstream portion 26 of the overflow channel 15 from the communication port 52D, and the grip 91 exposed to the outside of the communication port 52D is removed. The cleaning member 88 is rotated and moved up and down while being picked up. As a result, the brush bristles 92 slidably contact the inner wall of the overflow upstream pipe portion 25, and dirt attached to the inner wall can be removed by the brush bristles 92.

  Here, since the upstream portion 26 of the overflow channel 15 has a shape that rises along the back portion 18 from the overflow inlet 27 located downstream of the drain port 22, it is difficult for the user to access and it is difficult to clean. There is. However, according to the fifth embodiment, by using the communication port 52D into which the cleaning member 88 can be inserted, the upstream portion 26 of the overflow channel 15 can be cleaned without any trouble.

<Example 6>
FIG. 8 shows a sixth embodiment of the present invention. The sixth embodiment differs from the first embodiment in the formation position of the communication port 52E. The overflow channel 15 can be cleaned by the cleaning member 88E inserted in the communication port 52E in advance. Other structures are the same as those of the first embodiment.

  The overflow pipe 43 forming the downstream portion 29 of the overflow flow path 15 has a communication pipe portion 51E that stands upright from the upper surface side of a region that transitions from the straight pipe portion 48 to the elbow-shaped portion 49 and penetrates the back portion 19. I have. The communication pipe portion 51E has a communication port 52E at the upper end facing the fitting concave portion 94 provided in the back portion 19.

  The cleaning member 88E is a cleaning brush having a grip portion 91 and brush bristles 92, as in the fifth embodiment. The grip portion 91 has an outlet 93 that opens to the outside through the communication port 52E. I have. The cleaning member 88 </ b> E is always installed in the back portion 19 in a state where the grip portion 91 is fitted and supported in the fitting concave portion 94, and each brush bristle 92 is inserted into the overflow pipe main body 46.

  The air pool that can be formed in the overflow channel 15 and the water that can leak from the overflow channel 15 are discharged to the outside through the outlet 93 of the grip portion 91, and flow through the slope portion 55 and the bowl portion 12 as in the first embodiment. Can get inside.

  When cleaning the downstream portion 29 of the overflow channel 15, the dirt attached to the inner wall of the overflow pipe main body 46 can be removed by the brush bristles 92 by operating the grip portion 91, as in the fifth embodiment.

  According to the sixth embodiment, in addition to being able to clean the downstream portion 29 of the overflow channel 15, it is not necessary to prepare the cleaning member 88E every time cleaning is performed, so that the cleaning efficiency can be improved.

<Example 7>
FIG. 9 shows a seventh embodiment of the present invention. The seventh embodiment is provided with a water supply unit 95 that is separate from the water supply flowing into the overflow channel 15 from the overflow inlet 27. When the overflow channel 15 is cleaned, water is supplied from the water supply unit 95 to the overflow channel 15. Can be forcibly sent.

  The communication pipe portion 51F has a communication port 52F that is open from the upper surface of the straight pipe portion 48 and opens to the slope portion 55. The water supply unit 95 includes a water supply pipe 96 (schematically shown) from the water supply, and a backflow prevention unit 97 provided in the water supply pipe 96. The water supply port of the water supply pipe 96 is open to the overflow pipe 43, for example, the communication pipe section 51F. The backflow prevention unit 97 prevents backflow from the overflow flow path 15 to the water supply, and is configured by, for example, a check valve, a water discharge port space, or a composite structure combining these.

  When cleaning the overflow channel 15, the communication port 52 </ b> F is closed with the lid member 98, and a predetermined amount of water is forcibly sent from the water supply unit 95 to the overflow channel 15 at a predetermined flow rate. Thus, dirt attached to the inner wall of the overflow channel 15 can be discharged with the water pressure and the water flow from the water supply unit 95.

  Here, the cleaning agent can be introduced into the overflow channel 15 from the communication port 52F prior to the water supply from the water supply unit 95, and further, the water supply by the water supply unit 95 and the cleaning method described in Examples 4 to 6. By appropriately combining the above, dirt in the overflow channel 15 can be reliably removed.

<Other embodiments>
Hereinafter, other embodiments will be briefly described.
(1) The pipe forming the overflow flow path may be entirely formed of a member separate from the bowl portion. Conversely, the pipe that forms the overflow flow path may be entirely formed integrally with the bowl portion.
(2) The communication port may be an opening in a counter portion on the cabinet, which is a separate member from the bowl portion.
(3) The wall may be omitted from each embodiment as long as the wall has a slope. Conversely, if it has a wall, the slope may be omitted from each embodiment.
(4) Also in the first embodiment, it is possible to introduce the cleaning agent into the overflow channel from the communication port and clean the overflow channel. Thus, the communication port can function as a maintenance port.
(5) The communication port may have any form as long as it opens into a wall surface at a position where water can flow into the bowl portion. For example, a front wall (e.g., (Including a wall portion).
(6) The water supply section of the seventh embodiment may be configured to send water to only one of the upstream section and the downstream section of the overflow channel.

DESCRIPTION OF SYMBOLS 10 ... Washing stand 12 ... Bowl part 15 ... Overflow channel 17 ... Bottom part 21 ... Water faucet 22 ... Drain outlet 27 ... Overflow inlet 37 ... Drain faucet 47 ... Overflow outlet 52, 52A, 52B, 52D, 52E, 52F ... Communication port 55 ... slope section 56 ... wall section 61, 61C ... operation section 79 ... housing
83 ... On-off valve 88, 88E ... Cleaning member 95 ... Water supply unit W1 ... Maximum water level

Claims (10)

A bowl part having a drain port at the bottom,
A drain plug capable of closing the downstream side of the drain port,
It has an overflow inlet on the downstream side of the drainage port and on the upstream side of the drainage plug, and has an overflow outlet on the downstream side of the drainage plug, and a flow path above the drainage port and below the upper end of the bowl portion. Having an overflow channel from the overflow inlet to the overflow outlet via the channel portion;
A washstand including a communication port at a position that communicates with the overflow channel and allows water to flow into the bowl portion.   The washstand according to claim 1, wherein the communication port is provided on a slope portion inclined at a downward slope toward the inside of the bowl portion.   3. The wash basin according to claim 1, wherein a wall portion that dams the water is provided at a position opposite to the inside of the bowl portion with respect to the communication port. 4.   The washstand according to any one of claims 1 to 3, wherein the communication port is provided in a housing of a faucet that discharges water into the bowl portion.   The washstand according to any one of claims 1 to 4, wherein an on-off valve is provided downstream of the overflow channel.   The washstand according to any one of claims 1 to 5, wherein a cleaning member that cleans the overflow channel is inserted into the communication port.   The wash basin according to any one of claims 1 to 6, further comprising a water supply unit configured to supply water to the overflow flow passage in a separate path from water supply by drainage from inside the bowl unit.   The wash basin according to any one of claims 1 to 5, further comprising an operation unit that remotely controls opening and closing of the drain cock, wherein the operation unit is inserted into the communication port. A method for cleaning the overflow channel provided in the wash basin according to any one of claims 1 to 7,
A cleaning method for introducing at least one of a cleaning member, a cleaning agent, and water into the overflow channel through the communication port to clean the overflow channel. A method for cleaning the overflow channel provided in the wash basin according to claim 7,
Through the communication port, introducing at least one of a cleaning member, a cleaning agent, and water into the overflow channel, and sending water from the water supply unit to the overflow channel, the overflow channel Cleaning method to clean the house.

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