JP2009275504A - Flush toilet bowl - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem in a conventional flush toilet bowl wherein neither a urinal nor a toilet bowl has a function of washing urine drop filth on the peripheral wall upper end face of a bowl part, and urine drops flowing down the outer surface of the peripheral wall soil a floor face which has to be manually cleaned. <P>SOLUTION: The peripheral wall of the ball part of the flush toilet bowl is divided into an upper peripheral wall and a lower peripheral wall by a clearance penetrating the peripheral wall while slanting downward from the outer surface to the inner surface. The urine drops flowing down the outer peripheral surface of the upper peripheral wall is led into the ball part or a drain system through a water collecting passage formed of the clearance located directly under the upper end face outer peripheral part or further inward and opened to the upper end of the lower peripheral wall, and the urine drops are discharged with water for flushing the ball part inner surface. Alternatively, the upper end face of the upper peripheral wall is provided with an overflow port opened upward, and a water passage internally communicating with the overflow port, as a part of a flushing system for supplying flushing water to the bowl part, and the flushing water supplied to the water passage is allowed to overflow from the overflow port to both inside and outside of the peripheral wall to wash the upper end face and the inner and outer peripheral surfaces. The flushing water flowing down the outer peripheral surface is collected into the water collecting passage. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a flush toilet, and more particularly to a flush toilet having a function of guiding urine droplets on the upper end surface of a ball portion peripheral wall of a flush toilet or flush toilet to a drainage system.

  The conventional flush toilet has a function of flushing the inner surface of the ball portion opening upward in the urinal and the inner surface of the urine receiving surface portion standing upright from the rear portion thereof, and the inner surface of the ball portion in the toilet bowl with water. A number of inventions and devices related to this have been proposed as follows, but usually they do not have the function of cleaning the upper surface of the peripheral wall of the ball that is subject to contamination by urine droplets that scatter during urination. is there.

  As a means of flushing urine scattered on the side of the toilet bowl and the floor of the foot, it consists of a foot tray and washing water pipes connected to the main toilet and the lower front side of the main toilet. At the lower end, a water basin is formed that leads to the inside of the main toilet. The foot tray has a drain hole connected to the drain of the main toilet and a grid-like tread on the upper surface. There has been proposed a male toilet that is configured to be able to supply water to the upper part of the toilet bowl and the inner periphery of the foot tray. (See Patent Document 1)

  As a urinal that can efficiently wash urine that has fallen outside the urinal body, when installing a stall-type flush urinal on a concrete structure, a bowl-shaped body having a drain pipe and a trap is first installed. A ball part of the urinal body is installed with a gap inside the bowl-like body through an annular packing disposed in the edge of the tub body to form a double structure, and a first control unit for controlling the washing water for washing the urinal body An inner surface of the bowl and an outer surface of the bottom of the urinal body by providing control means and second control means for controlling washing water for washing the inside of the bowl and the outer surface of the bottom of the urinal body A configuration has been proposed that can be cleaned. (See Patent Document 2)

  In the stall type flush toilet, the rim of the sag receptacle is intended to reduce the amount of urine adhering to the upper surface of the rim of the sag receptacle, that is, the edge of the peripheral wall, and to reduce the manual cleaning effort of the urinal. There is also a proposal to make the width dimension of the urine smaller than the rims on both side walls of the urine receiving surface of the urinal body. (See Patent Document 3)

  In addition, in the ball part of the flush toilet, the rim water channel at the front part of the ball part where urine is liable to urine during boys' use is removed to widen the ball part opening by the width, while the ball surface of that part In order to prevent contamination due to urine, a configuration has also been proposed in which cleaning water is discharged from the rim conduit discharge port that terminates at both sides of the ball portion to the front drying surface for cleaning. (See Patent Document 4)

  Provided with a rim with the upper end portion of the ball portion peripheral wall drawn inward, and a cleaning water swirl path that swirls around the ball portion circumferential surface with the peripheral wall portion below the retracted portion exposed from the water storage surface in the ball portion as a shelf A flush toilet that has been formed to improve the toilet cleaning function has also been proposed. (See Patent Document 5)

  There is an attempt to clean not only the inner surface of the toilet bowl but also the outer surface including the edge, and the ball section of the flush toilet that has been fixed up to now is stored upright and contains a washing water nozzle, a drying unit, and a drain trap. If it is pivotably attached to the cabinet and rotated from the horizontal protruding position to the upright storage position after use, the cleaning water from the cleaning water nozzle is not only the inner surface of the ball unit, but also the edge of the ball unit, the outer surface, A configuration has been proposed in which the toilet seat is cleaned, the waste in the ball portion is discharged to a drain trap, and the cleaning surface is dried by a drying unit after the cleaning is completed. (See Patent Document 6)

  There is also a method aimed at preventing dirt from adhering by performing water repellent treatment on the entire surface of the cleaning surface, but if water repellent treatment is performed on the entire surface of the cleaning surface, for example, in the case of a toilet, it is from a small hole in the water passage of the rim. The cleaning water that has come out does not diffuse across the entire cleaning surface and flows down as it is, leaving a non-cleaning area where cleaning water is not supplied, so that the cleaning surface is polymerized by siloxane crosslinking and crosslinking other than siloxane. By providing a plurality of water-repellent areas with a silicone coating formed with a substance containing silicone, with a gap, the flow of the cleaning water flows along the remaining non-water-repellent areas by making the entire cleaning surface not a water-repellent area. It has been proposed to reduce the proportion of parts that are diffused and not cleaned. (See Patent Document 7)

  Similarly, as a configuration for supplying cleaning water to the entire surface of the cleaning surface, by providing a spreader that sprays the cleaning water toward the cleaning surface in a spray form, not only the direction in which the cleaning water falls due to gravity, but also in an oblique direction, and There is a configuration in which it is possible to prevent unevenness in the cleaning power by flowing down while diffusing in the lateral direction. (See Patent Document 8)

  In general, when a ceramic toilet is used for a long period of time, the toilet bowl surface is gradually hydrophobized and the hydrophobized area increases. For this reason, the washing water flow path gradually narrows and flows only in a certain place. As a countermeasure against this, a flush toilet has been proposed in which a plurality of water outlets are formed, and washing water is discharged from the previous water outlet in a plurality of directions. (See Patent Document 9)

  This is not intended for the upper end surface of the peripheral wall of the ball part, but in a water-based product having a cleaning surface that is cleaned with cleaning water after use, the cleaning surface is effectively cleaned with a small amount of cleaning water. It has been proposed to provide a large number of spray holes with a pitch of 2 cm or less for discharging cleaning water downward from the water passage in the rim portion at the upper end of the peripheral wall toward the inner surface of the peripheral wall. (See Patent Document 10)

  As a cleaning method suitable for surface treatment to make it easier to remove dirt and other dirt adhering to the ball surface of flush toilets, it was recessed into a groove shape in the horizontal direction along the upper edge of the ball surface. The rim shot cleaning water discharged into the guide recess swirls in a substantially horizontal direction along the upper edge of the ball surface while being guided by the guide recess, and becomes a flow branched in various places from the swiveling main flow along the exposed surface. There are also proposals that make it easier to communicate. (See Patent Document 11)

  Furthermore, as a measure for improving the cleaning function for the peripheral wall surface of the ball part by changing the structure of the peripheral wall of the ball part in the flush toilet, flush water is discharged along the inner wall surface of the toilet bowl directly facing the toilet bowl, The main wash water is formed so that the wash water does not jump out of the toilet bowl and flows around the inner wall surface of the toilet bowl, and the split wash water separated from the main wash water is further divided into the inner surface of the toilet bowl. There has been proposed a cleaning method for guiding all the cleaning water to the drainage channel inlet after guiding it to reach the whole. (See Patent Document 12)

  Recently, many researches and proposals on hydrophilicity and its applications have been found from the viewpoint that surface hydrophilicity is a major factor in preventing dirt on the surface of objects or preventing dirt. A composition having a photocatalytic function is highly hydrophilized by photoexcitation and exhibits a high hydrophilicity with a contact angle with water of 10 ° or less, more specifically 5 ° or less. This is called superhydrophilicity. A composite material having such a highly hydrophilic surface and a method for producing the same are shown. (See Patent Document 13)

  And, by making the surface of the mirror and lens highly hydrophilic, as a technology that imparts anti-fogging properties, prevents surface contamination, makes the surface self-cleanable, or facilitates artificial cleaning, A method of making a surface of glass or the like superhydrophilic with a photocatalyst has been proposed. (See Patent Document 14)

  By applying these photocatalytic technologies to the surface cleaning of flush toilets, it is also attempted to prevent the adhesion of dirt by making the surface of at least the ball part of the flush toilet toilet hydrophilic so that the adhered dirt can be easily washed. Has been made. (See Patent Document 15)

  There has also been proposed a composition that maintains good hydrophilicity for a long time even under weak illumination in a room or even in a dark place when it is hydrophilized in response to photoexcitation of a photocatalyst. (See Patent Document 16)

  On the other hand, under weak lighting in the room, it takes time to make the photocatalyst hydrophilic by photoexcitation, so the contact angle with water on the surface increases with the passage of time. A proposal to further improve the cleaning effect of alkaline water by putting a surfactant in alkaline water used as cleaning water, covering the surface of the composite material without fouling the surface of the component and improving the compatibility of alkaline water It has also been. (See Patent Document 17)

  The surface hydrophilization with photocatalyst particles is not limited to toilet bowls. The glaze layer on the surface of the base material is used to make the surface of all ceramic products have a hydrophilic property that can exhibit a hydrophilic recovery function even in a room that is hardly exposed to light. Alternatively, it has been proposed to form a layer containing an anisotropic substance such as γ-alumina or boehmite on the printed layer. The hydrophilicity is indicated as a state exhibiting water wettability of 30 ° or less, preferably 10 ° or less, and more preferably 5 ° or less in terms of a contact angle with water. (See Patent Document 18)

  On the other hand, a toilet bowl made of resin is proposed instead of a ceramic one, and the weight of the toilet bowl is greatly reduced and the manufacture thereof is facilitated. A toilet having a surface layer portion containing a photocatalyst and a binder component, wherein the concentration of the photocatalyst in the surface layer portion increases from the inside of the toilet toward the surface, has also been proposed. (See Patent Document 19)

  However, when the toilet bowl is made of resin, on the contrary to the advantages of weight reduction and ease of construction work, there arises a problem that the filth adhering to the resin ball surface becomes difficult to be washed with water and becomes unsanitary. Therefore, a surface layer containing photocatalyst particles is formed on the ball surface of a resin toilet bowl by utilizing the fact that when the photocatalyst is photoexcited in a member having a surface layer containing a photocatalyst, the surface of the member is highly hydrophilic. A resin flush toilet has also been proposed in which the ball surface is made hydrophilic by photoexcitation of a photocatalyst and the ball surface can be easily cleaned. (See Patent Document 20)

  Although not related to the toilet bowl body, there is also a proposal to increase the water repellency of resin-made heated toilet seats including toilet lids and washing nozzles, high crystalline polypropylene resin, polymer material with a critical surface tension of less than 28 dyne / cm and inorganic filling Each member is formed of a composition mainly composed of a material, but proposals have been made to greatly improve water repellency and antifouling properties in the coexistence of the polymer material used with the polypropylene resin and coexistence with the inorganic filler. . (See Patent Document 21)

  There is also a proposal to prevent the generation of bad odor in the toilet by preventing sewage from entering the gap between the toilet bowl and the toilet installation surface. Therefore, a sewage receiving recess is formed on the outer peripheral surface of the front part of the toilet, along the toilet outer surface. A sewage reservoir for collecting the sewage flowing down is installed in the sewage receiving recess. (See Patent Document 22)

  In flush toilets, a scattering urine receiver that receives urine that scatters and falls from the outside on the outside of the toilet body, and an inflow hole that allows the received urine to flow into the toilet body inside, both sides from the front end of the toilet body It has been proposed to be provided. The scattered urine receiver extends obliquely upward from the lower part of the toilet body, and the inflow hole is provided in the lower part of the toilet body. (See Patent Document 23)

JP 2004-316211 A JP-A-11-36420 JP 2002-242274 A Japanese Patent Laid-Open No. 11-256660 JP 2004-11414 A JP 2000-8462 A JP 2000-273934 A JP-A-11-350576 JP 2001-234575 A JP-A-11-350575 JP 2001-132071 A Japanese Patent No. 3381261 Japanese Patent No. 2756474 Japanese Patent No. 2924902 Japanese Patent Laid-Open No. 9-78665 Japanese Patent No. 2865065 JP 2000-279905 A Japanese Unexamined Patent Publication No. 2000-211983 JP 2004-107952 A Japanese Patent Laid-Open No. 9-224874 Japanese Patent Laid-Open No. 9-154772 JP 2002-322718 A Noto 3053918

  The stall-type flush urinal described in Patent Document 1 also flows into the flushing basin provided on the side wall of the main urinal and the end wall of the peripheral wall of the drooping receiving section. Although the urine droplets are washed, the urine droplets adhering to the edge surfaces on both sides and the side surfaces following the urine droplets and the function of cleaning dirt on the upper end surface of the ball peripheral wall are not provided.

  Also in the case of Patent Document 2, the peripheral wall of the ball portion serves as a partition between the cleaning water for cleaning the inside of the urinal body and the cleaning water for cleaning the inside of the bowl and the outer surface of the bottom of the urinal body, It does not have a function to clean dirt.

  The stall-type flush urinal described in Patent Document 3 is intended to reduce the artificial cleaning effort of the urinal, and the width dimension of the rim of the drooping receiving portion is set to the both side walls of the urine receiving surface portion of the urinal body. It is a proposal to make it smaller than the rim, but it does not have a function to clean the rim top surface.

  Even in the Western-style toilet described in Patent Document 4, the rim conduit at the front part of the ball part where urine is liable to be applied to a boy's small is removed to widen the ball part opening by the width. There is no function for cleaning dirt on the upper end surface of the peripheral wall.

  In the Western-style toilet described in Patent Document 5, an improvement in the function in the case of cleaning the toilet by jetting cleaning water along the inner wall surface of the upper edge of the ball surface has been proposed. There is no function for cleaning dirt on the end face.

  Only Patent Document 6 proposes a configuration for cleaning the entire surface of the inner surface of the bowl part of the toilet and the outer surface including the upper end of the peripheral wall. In this case, the ball part can be rotated with respect to the upright storage cabinet and moved into the cabinet. Since the cleaning is performed at the drawing-in position, a waterproof structure is required to prevent the cleaning water from flowing out from the nozzle, which is problematic in terms of manufacturing cost. In addition to the problem of increased costs for drying after washing, it takes time to dry, making it unsuitable for continuous use by the next user and unsuitable for installation in public facilities. is there.

  Patent Document 7 is a proposal for solving the problem of non-cleaning area when the water-repellent treatment is performed on the entire cleaning surface of the product around water, but the object is the inner surface of the ball portion, and the dirt on the upper end surface of the peripheral wall of the ball portion. It does not have the function of cleaning.

  Similarly, Patent Document 8 is configured to supply cleaning water to the entire surface of the cleaning surface, and includes a spreader that sprays the cleaning water toward the cleaning surface in a spray form, so that not only the direction in which the cleaning water falls due to gravity, It is configured to prevent the unevenness of the cleaning power by flowing down while diffusing in an oblique direction and a lateral direction, and does not have a function of cleaning dirt on the upper end surface of the peripheral wall of the ball portion.

  According to Patent Document 9, when a ceramic toilet bowl is used over a long period of time, the toilet bowl surface is gradually hydrophobized, the hydrophobized area increases, the wash water flow path gradually narrows, and only a limited place flows. As a countermeasure against this, it is a proposal of a flush toilet in which a plurality of water outlets whose directions are changed are formed and the washing water is discharged in a plurality of directions, and has a function of washing dirt on the upper end surface of the peripheral wall of the ball portion. Absent.

  In Patent Document 10, it has been proposed to provide a large number of water spray holes for effectively discharging a small amount of washing water downward from the water passage in the rim portion at the upper end of the peripheral wall toward the inner surface of the peripheral wall. It does not have the function of cleaning.

  In the case of Patent Document 11 as well, a substantially horizontal swirling water flow is formed on the inner surface along the upper edge of the ball surface and the ball inner surface is cleaned, but the function of cleaning the upper end surface of the ball portion is not achieved.

  Similarly to the above, Patent Document 12 forms cleaning water that circulates along the inner wall surface of the upper edge of the toilet bowl to clean the entire inner surface of the ball, and does not perform the cleaning of the upper end surface of the ball portion.

  Patent Documents 13 and 14 suggest the flush toilet in terms of making the substrate surface superhydrophilic and preventing soiling, but these documents simply prevent the condensation on a smooth surface, It relates to a transparent substrate and a method for producing the same, and is not directly related to a toilet.

  Patent Documents 15 to 21 are all hydrophilized by photoexcitation technology of the photocatalyst on the inner surface of the ball part of ceramic or resin flush toilets, and can prevent and clean the upper end surface of the ball part peripheral wall. It is not something to do.

  In the case of Patent Document 22, although it is possible to prevent sewage from reaching the toilet installation surface, it is only possible to make a bad smell by actively making the outer peripheral surface of the toilet flow down and collecting the sewage in the storage container. Absent.

  The scattered urine receiving device of Patent Document 23 is provided so as to protrude widely from the lower side of the toilet body to the upper outer side in order to capture urine that is scattered and dropped around the outside of the flush toilet. In addition, the collected urine will flow down the surface of the scattered urine receiver, causing odor generation before reaching the inflow hole. Since this scattered urine receiver does not serve as a countermeasure against contamination of the toilet body, that is, the peripheral wall of the ball part, the urine adhering to the upper end surface of the ball part remains as it is or flows to the outer peripheral surface, allowing the ball part peripheral wall to flow down endlessly. I must.

  In any of the above-mentioned patent documents, the structural improvement intended to improve the cleaning efficiency for the inner surface of the ball part, the prevention of dirt from adhering to the inner surface of the ball part, or the repellency for facilitating the cleaning of the attached dirt. It is a variety of devices for imparting aqueous or hydrophilic properties, and the antifouling effect due to water repellency or hydrophilicity is only fully exhibited by washing with water. In that sense, the washing water is placed outside the ball or toilet. There is still no proposal to prevent the urine droplets from staying on the upper end surface of the peripheral wall and allowing the urine droplets flowing down the peripheral surface of the peripheral wall to be collected in the ball part or in the drainage system without spilling or splashing. .

  The present invention is intended to solve the problem of such a conventional configuration. In a flush toilet or flush toilet, the upper end surface of the peripheral wall of the ball portion is contaminated by adhesion of urine droplets scattered during urination. In this case, the urine droplets can naturally flow down with high efficiency, and can be accommodated in the ball part quickly and reliably, and at least the contamination of the upper end surface of the ball part can be minimized to prevent the toilet mounting floor from being contaminated. The purpose is to provide a flush toilet with sewage.

  In order to achieve the above object, as a first problem solving means, the present invention provides a cleaning system for supplying cleaning water to the entire inner surface including the ball portion of a flush toilet or flush toilet, and flush water concentrated in the ball portion. In a flush toilet comprising a drainage system that discharges water to the outside from the drain outlet at the bottom, the outer peripheral surface that is continuous with the upper end surface and the curved surface is directed inward and downward over the entire circumference of the peripheral wall substantially parallel to the upper end surface of the ball portion peripheral wall The water collecting channel that is drawn into the ball portion inner surface is arranged below the upper end surface of the ball portion peripheral wall, and the urine droplets scattered and adhered to the upper end surface of the ball portion during urination are allowed to flow down into the water collecting channel along the outer peripheral surface. It is characterized in that it can be recovered in the ball part or in the drainage system while maintaining contact with the outer peripheral wall surface.

  As a second problem-solving means, a flush-type urinal or a urinal, wherein the urine receiving surface part is lower in the urinal, and the bowl part located at the lower part of the toilet seat in the urinal and having an open upper surface forms the upper end The upper peripheral wall and the lower peripheral wall rising from the bottom of the ball part, and at the height position where the outer diameter of the upper peripheral wall is smaller than the upper end part of the ball part, the outer peripheral surface of the lower peripheral wall of a part or substantially the entire circumference is the upper peripheral wall The urine that flows down the outer peripheral wall surface of the ball part by forming a water collecting channel by placing a gap with a width that does not prevent the flow of urine droplets flowing down the outer peripheral surface of the upper peripheral wall directly below or inside the outer peripheral surface of the upper end. The droplets can be accommodated in the ball portion while maintaining contact with the outer peripheral wall surface.

  As a third problem solving means, the peripheral wall forming the upper end of the ball part forms substantially the entire ball part, and the outer peripheral wall of the drainage system forming the drainage system below the ball part does not hinder the drainage of the washing water. The side surface is open at the height position, and the drainage system outer peripheral wall surface is arranged with a gap of a width that does not prevent the urine droplets flowing down the outer peripheral wall surface of the ball portion directly below or inside the outer peripheral surface of the upper end of the upper peripheral wall. Thus, a water collecting channel is formed, and urine drops flowing down the outer peripheral wall surface of the ball portion can be accommodated in the drainage system.

  As a fourth problem solving means, the cleaning system has a water passage extending along the upper end portion of the peripheral wall surrounding the opening of the ball portion, and communicates with the inside of the water passage in the entire length of the water passage so as to have a substantially full length of the upper end portion. The surface includes an opening overflow opening, and the washing water supplied to the water passage overflows from the overflow groove to form a water film flow that cleans the upper end surface, and the drainage system starts from the upper end surface following the overflow opening. It includes the inner wall and / or outer wall at the upper end that allows the overflow water film flow to flow down, and the outer wall included in the drainage system is drawn inward at least below the water passage so that the full length of the overflow port A water collecting channel is provided so as to accommodate the water film flow that opens along the outer wall and flows down the outer peripheral wall and leads to the drainage system while maintaining contact with the outer peripheral wall surface.

  As a fifth problem solving means, the water collecting channel is provided to penetrate from the outer peripheral surface of the mounting upper end portion to the inner periphery in a separate mounting upper end portion that covers the upper end of the peripheral wall of the toilet bowl and is detachable. It is characterized by.

  The operation of the first problem solving means is as follows. That is, the flush urinal or flush toilet according to this means is configured so that the outer peripheral surface continuous with the upper end surface and the curved surface is drawn inwardly and downwardly over the entire circumference of the peripheral wall substantially parallel to the upper end surface of the ball portion inner surface. By providing a water collecting channel that opens to the top, the scattered urine droplets on the upper end surface of the ball portion peripheral wall flow down into the water collecting channel along the outer peripheral surface, and are collected in the ball portion or the drainage system while maintaining contact with the outer peripheral wall surface.

  The action by the second problem solving means is that the lower end of the upper peripheral wall forming the upper end of the ball part and the upper end of the lower peripheral wall raised from the bottom are the heights at which the outer diameter of the upper peripheral wall is smaller than the upper end part of the ball part. At this position, the outer peripheral surface of the lower peripheral wall of a part or substantially the entire circumference is positioned directly below or inside the outer peripheral surface of the upper end of the upper peripheral wall, so that dropped urine droplets scattered during urination are captured by the upper end surface of the upper peripheral wall. The arrangement does not reach the lower peripheral wall. Furthermore, by arranging a lower peripheral wall with a gap that does not hinder the flow of urine drops flowing down the outer peripheral surface of the upper peripheral wall, the urine drops flowing down the outer peripheral surface of the upper peripheral wall are kept in contact with the outer peripheral wall to ensure water collection Lead in.

  The action of the third problem solving means is that the entire ball portion is formed by the peripheral wall including the upper end of the ball portion, while an opening is provided in the side surface of the drainage system at the bottom of the ball portion to accommodate urine droplets flowing down from the outer peripheral surface of the upper end of the ball portion. The water collecting channel is configured by a gap between the drainage system outer peripheral wall surface and the ball part peripheral wall outer surface, which is provided from a position immediately below the ball part upper end outer peripheral surface or the ball part inner side to the drainage system side surface opening. Accordingly, the water collecting channel is not formed as a gap crossing the ball portion peripheral wall inward and outward, but as a gap along the outer surface of the ball portion peripheral wall.

  The action of the fourth problem solving means is to supply the water passage by providing a water passage along the length of the upper end of the ball portion peripheral wall and an overflow opening that opens to the surface of the upper end in communication with the entire length of the water passage. The washed water overflowed laterally over the entire length of the upper end surface and flows as a water film on the upper end surface, so that the urine droplets adhering to the upper end surface are washed with this water film flow. The water film flow that flows down the outer peripheral wall from the upper end surface makes contact with the outer peripheral wall surface in the water collecting channel that opens to the entire circumference of the ball peripheral wall by drawing the outer peripheral wall downward and inward from the water channel. It is kept and stored, guided to the drainage system, and discharged with the wash water that washed the inner surface of the toilet.

  The action of the fifth problem solving means is that the water collecting channel is provided so as to penetrate the inner surface from the outer surface of the separate mounting upper end portion which covers the upper end portion of the bowl portion of the toilet bowl and is detachable. It can be used as an attachment type that is attached to the upper end of the unit.

  According to the present invention, a flush toilet comprising a flushing system that supplies flush water to a bowl part of a flush toilet or flush toilet and a drainage system that drains flush water from the ball part through a drain outlet includes an upper end of the ball part. The urine droplets adhering to the upper surface of the water flow down as a water film flow. When this water film flow is directed outward, the water film flow that flows outside the toilet flows along the outer peripheral wall surface, and then extends inward and downward over substantially the entire circumference of the peripheral wall substantially parallel to the upper end surface of the peripheral wall. The water collecting channel that is opened is collected while maintaining contact with the outer peripheral wall surface, and flows into the drainage system, so that the water film flow is not scattered from the outer peripheral wall surface to the floor surface. Preferably, hydrophilicity is imparted from the upper end surface to the outer peripheral wall surface, and the curved surface included in the outer peripheral wall has a gently continuous curvature, so that the water film flow flows more securely while maintaining contact with the outer peripheral wall surface. Since it is housed in a waterway, it does not get wet around the toilet. Also, if a water passage is provided at the upper end of the peripheral wall of the ball and the washing water is overflowed from the overflow port, the adhering urine droplets on the inner and outer peripheral surfaces are washed from the upper end surface of the peripheral wall to wash the outer peripheral surface. The falling water film flow is collected in the collecting channel.

  Several embodiments of the present invention will be described below with reference to FIGS.

  As a first embodiment according to the present invention, FIG. 1 and an enlarged view of a part thereof are shown in FIG. The flush urinal 1 generally includes a receiving surface portion 2 that is erected on the front surface of the user and receives urination, a body portion that is connected to the lower portion thereof, and a ball portion 3 that includes a drooping receiving portion that protrudes toward the user. It becomes more. A water supply part 15 connected to an external water supply pipe (not shown) is provided at the top of the receiving surface part 2, and a drain port 12 is provided at the lowest part of the ball part 3, and a trap 13 and an external sewage pipe (not shown) are provided. The drain pipe including the discharge port 14 connected to the drain port 12 is connected to the drain port 12, and the inner surfaces of the receiving surface portion 2 and the ball portion 3 are cleaned by the cleaning water distributed from the water supply portion 15 by an electromagnetic valve device (not shown), The wash water after washing is drained from the drain port 12.

  The remarkable feature of the first embodiment is the structure of the peripheral wall 4 that surrounds the drooping receiving portion of the ball portion 3, and the peripheral wall 4 includes an upper end portion 5 that does not have a conventional rim portion projecting inward. The upper end portion 5 includes an outer peripheral wall 5b continuously descending with a curved surface on the upper surface, an inclined bottom surface 5d inclined downward toward the inner surface of the wall via a retraction portion 5c formed of a curved surface drawn inward with a slightly large curvature, It comprises an inner peripheral wall 5f that continuously hangs down on the upper surface in a curved surface and is coupled to the inner lower end of the inclined bottom surface 5d. The end of the peripheral wall that is a slope substantially parallel to the inclined bottom surface 5d is positioned at a distance from the inclined bottom surface 5d of the upper end portion 5, and the lower end of the peripheral wall 4 is continuous with the bottom wall 11 of the ball portion 3 via a curved surface. To do. The interval between the inclined bottom surface 5d and the peripheral wall end portion forms a water collecting passage 9 having a water collecting opening 8 at the upper end portion of the peripheral wall end portion and a water collecting outlet 10 at the lower end portion, and the water collecting passage 9 penetrates the peripheral wall 4. The outer surface communicates with the inner surface, that is, with the inside of the ball portion 3. Since the water collecting channel 9 is provided along the length of the overflow port 6, that is, substantially over the entire length of the upper end portion 5, the ball portion 3 is divided into two vertically by the water collecting channel 9. In this case, the upper end portion 5 constituting the upper portion is held in a cantilever form by the main body portion of the urinal, so that a reinforcing material is incorporated if necessary. Alternatively, the peripheral wall 4 and the upper end portion 5 may be integrated by a plurality of columns or walls (not shown) spaced in the circumferential direction of the water collecting channel 9.

  Here, the peripheral wall 4 includes an upper end portion 5 that does not have a conventional inwardly extending rim portion, but an upper end portion having a rim portion, an upper end portion to which swirling water is supplied to the inner surface of the rim portion, or It is also possible to combine the above-described configuration of the present invention with an upper end portion that allows water to flow from the water passage provided in the rim portion to the inner surface of the ball portion. In that case, the rim portion can be provided on either the upper side of the water collecting channel 9, the inclined bottom surface 5d, or the lower side, that is, the upper end portion of the peripheral wall end portion 4a.

  Here, in this embodiment, at least the outer upper surface and the outer peripheral wall surface of the ball portion 3 contain a hydrophilic material having a critical surface tension of 20 dyne / cm or more, preferably 40 dyne / cm or more, and more preferably photocatalyst particles. Thus, a hydrophilic material having a critical surface tension of 20 dyne / cm or more, preferably 40 dyne / cm or more is formed. Therefore, the urine droplets adhering to the upper end part spread in close contact with the upper end surface with high wettability with the surface at the upper end of the peripheral wall, flow as a thin water film on the upper end surface, and other urine droplets adhere to this. Is easily peeled off and flows down to the outer peripheral wall.

  The use of a hydrophilic surface material is generally for preventing dirt from adhering to the surface of the ball part and facilitating cleaning and purification of the surface. The water film flow descending and flowing down the outer peripheral wall 5b is maintained in close contact with the wall surface due to the hydrophilicity of the outer peripheral wall 5b during the change in the flow direction, and is separated from the wall surface and scattered around the toilet bowl. It is also to prevent.

  In the illustrated example, the surface shape of the outer surface of the peripheral wall consisting of the outer peripheral wall 5b and the lead-in portion 5c continuous with the curved surface together with the upper end surface of the peripheral wall 4 is sufficient for the water film flow from the upper end surface to maintain contact with the outer peripheral wall surface. It is formed as a continuous curved surface with gentleness. It is desirable that the continuous curved surface change slowly even when the curvature changes. In any case, the flow is determined by the surface tension and flow rate of the falling water film flow, and the critical surface tension of the outer wall surface material. The contact angle between the water film flow tip and the outer peripheral wall surface needs to be maintained at an angle of 90 degrees or less, close to 0 degrees, that is, an acute angle. In particular, in the part that is drawn inward from the outer peripheral wall surface, the combined vector of the vector in the direction in which the tip of the water film flows along the outer peripheral wall surface and the gravity vector of the water film itself exceeds the gravity vector. Set the direction of curvature and curvature. As a result, the water film flow is separated from the outer peripheral surface of the upper end portion and flows into the water collecting channel 9 without falling, so that the outer surface of the outer peripheral wall 5b of the upper end portion 5 and the outer surface of the peripheral wall end portion 4a below the same are arranged on the same surface. it can. That is, the peripheral wall end 4a that forms the lower edge of the water collection opening 8 of the water collection channel 9 can be in a state where it does not protrude outward from the outer peripheral wall surface of the upper end when viewed from above, and is contaminated by scattered urine droplets. To prevent that.

  Further, the outer peripheral wall 5b may be any of a vertical surface, a bulging curved surface, an outward or inward inclined surface, but in any case, the outer peripheral wall portion serving as the upper edge of the water collection opening 8 maintains the above contact angle. Even if the water film flow is peeled off from the outer peripheral wall surface and falls at this portion, it is already dropped onto the inclined surface inside the peripheral wall end portion 4a.

  In the flush toilet 1 of the first embodiment configured as described above, for example, a human body detection switch (not shown) provided on the front surface of the water supply unit 15 detects the separation of the user, and the water supply electromagnetic valve is activated to supply water. When water is supplied to the portion 15 or when the water stored in the water supply portion 15 is distributed, a part of the water becomes cleaning water that diffuses over the entire surface of the receiving surface portion 2, and the other portion cleans the inner surface of the ball portion peripheral wall 4. It becomes washing water.

In other words, the water collecting channel 9 formed between the ball portion peripheral wall 4 and the upper end portion 5 is, in other words, between the upper peripheral wall 500 forming the ball portion upper end and the lower peripheral wall 400 rising from the bottom of the ball portion. Is formed. The point is that the urine droplets flowing from the uppermost surface of the upper peripheral wall 500 to the water collecting channel 9 are surely guided to the water collecting channel 9 through the water collecting openings 8 without dropping the urine droplets flowing on the outer peripheral surface to the floor. It is realization of the structure accommodated in the inside of the ball | bowl part 3 from the exit 10. FIG. For that purpose, the cross-sectional shape of the upper peripheral wall 500 and the positional relationship between the outer peripheral wall 5b and the water collection opening 8 or the outer end of the lower peripheral wall 400 are important. Three specific embodiments thereof are shown in FIGS.

  FIG. 2 shows a typical embodiment, in which the upper peripheral wall 500 has a chevron upper surface with the highest portion positioned substantially at the center in the width direction. The outer slope is connected to an inclined bottom surface 5d that forms the upper surface of the water collecting channel 9 through an outer peripheral wall 5b and a lead-in portion 5c that are continuous with curved surfaces. The inner slope of the upper surface of the chevron is continuous with the substantially straight inner peripheral wall 5f, and merges with the inner lower end of the oblique bottom 5d at its lower end. Desirably, hydrophilicity is imparted from the outer slope to the retracting portion 5c. Moreover, the continuous outer peripheral wall 5b and the drawing-in portion 5c are not connected with a curvature radius that changes extremely, and urine droplets that spread thinly and flow down the outer peripheral wall surface are not separated. Therefore, the urine droplets attached to the outer slope of the upper surface of the mountain shape become a thin water film, reach the outer peripheral wall 5b, and further flow down along the retracted portion 5c, and are reliably accommodated in the water collecting channel 9 and guided into the ball portion. Urine droplets attached to the inner slope flow along the slope to the inner peripheral wall 5f and are accommodated in the ball portion. Other configurations, operations, and effects of this embodiment are as described in detail with reference to FIGS.

  In the embodiment of FIG. 3, the upper surface of the upper end portion is provided as an inclined surface that has the upper end of the inner peripheral wall 5f as a vertex and descends toward the outer peripheral wall 5b. The configuration from the outer peripheral wall 5b to the water collecting channel 9 is the same as that in the embodiment of FIG. Accordingly, the urine droplets that have fallen on the upper surface of the upper end portion, which is an outwardly inclined surface, flow down to the outer peripheral wall 5 b and are carried into the ball portion via the water collecting channel 9.

  In the embodiment of FIG. 4, the upper surface of the upper end portion is provided as an inclined surface that rises up the outer peripheral wall 5b substantially vertically, has an appropriate height position, and descends toward the inner inner peripheral wall 5f. The configuration from the upper peripheral wall outer peripheral surface 5b to the water collecting passage 9 is the same as that of the embodiment of FIG. Accordingly, the urine drop that has fallen on the upper surface of the upper end surface that is an inwardly inclined surface flows down to the inner peripheral wall 5f and is accommodated in the ball portion. The urine droplets attached to the rising portion of the outer peripheral wall 5b flow down along the outer peripheral wall surface, flow into the drawing-in portion 5c, and are carried into the ball portion through the water collecting channel 9.

  2 to 4 of the above-described embodiment, the upper peripheral wall 500 is illustrated as a hollow body, but is not limited to the hollow body. On the other hand, for example, in a flush toilet, a load on the human body is applied to this portion. Therefore, in order to support the upper peripheral wall 500 separated from the peripheral wall 4 by the water collecting channel 9, an arm of the cantilever structure is attached from the toilet main body. It can also be passed through the upper end.

  The second embodiment shown in FIG. 5 relates to a flush toilet. The difference from the first embodiment is that, in the first embodiment, the upper peripheral wall 500 and the lower peripheral wall 400 are in a substantially vertical positional relationship, while the second embodiment. Then, the lower end of the outer peripheral surface of the upper peripheral wall is disposed on the inner side of the ball portion than the inner peripheral surface of the lower peripheral wall and below the upper end surface of the lower peripheral wall. In this positional relationship, the water collecting opening 8 of the water collecting passage 9 is defined. The upper end edge of the lower peripheral wall 400 is located on the inner side of the ball part from the position directly below the outer peripheral wall 5b, and desirably accommodates urine drops flowing down along the outer peripheral wall 5b imparted with hydrophilicity, and at the same time. Since the upper end of the urine does not protrude forward from the outer peripheral wall 5b, the dropped urine droplets scattered during urination are captured by the upper end surface of the upper peripheral wall, and the lower peripheral wall is not contaminated. Furthermore, by arranging a lower peripheral wall 400 with a gap that does not hinder the flow of urine drops flowing down the outer peripheral wall 5b, the urine drops flowing down the outer peripheral surface of the upper peripheral wall are reliably guided into the water collection channel, and the user feels uncomfortable. Not give.

  A gap having a width that does not prevent the flow of urine droplets flowing down the outer peripheral surface of the upper peripheral wall below the inner peripheral surface of the lower peripheral wall from the inner peripheral surface of the lower peripheral wall and below the upper end surface of the lower peripheral wall. Opening and placement is significant when applied to flush toilets. In particular, when urinating while sitting on a flush toilet having a conventional structure, the urination hits the inner peripheral surface of the ball part in the front part of the front toilet as viewed from the user, and a part of the urine is between the upper end surface of the ball part and the lower surface of the toilet seat. It flows from the gap to the outer peripheral surface, and the outer peripheral surface and the toilet floor are contaminated. Even with the arrangement of the peripheral wall of this embodiment, the urine droplets leaking from the gap between the toilet seat and the upper peripheral wall cannot be prevented from flowing down to the outer peripheral surface of the peripheral wall. Contamination of the floor is prevented because it is housed in the department or in the drainage system. Further, when viewed from the inside of the toilet, the inner peripheral wall 5f covers the lower peripheral wall upper end surface and the water collection outlet 10 from the inner side, so that urination at the sitting position does not flow backward through the water collection channel 9.

  FIG. 6 shows another water collecting channel configuration similar to the water collecting channel configuration in the second embodiment shown in FIG. In this case, the substantially plate-like upper peripheral wall 500 is in a vertical positional relationship with the lower peripheral wall 400 as in the first embodiment of FIG. 1, but the upper peripheral wall 500 is formed as a flat or gently curved convex curved surface, It is installed so that the lower end 5g of the upper peripheral wall is located on the upper end surface of the lower peripheral wall. Therefore, the lower peripheral wall upper end 4d located at the water collection opening 8 is almost directly below the outer peripheral wall surface 5b of the upper peripheral wall 500, and even if the urine drops are peeled off from the outer peripheral wall having a gently curved surface, the urine drops are collected. It will be captured on the slope of the waterway 9. This configuration can be used for both urinals and urinals.

  Example 4 of FIG. 7 relates to a flush urinal. This urinal is different from that of Example 3 in that an upper peripheral wall 500 that forms the upper end of the peripheral wall surrounding the opening of the ball portion 3 has a peripheral wall outer peripheral surface. The outer wall of the drainage system outer peripheral wall 4b whose side faces are opened at a height that does not interfere with the drainage of the wash water, and the inner wall of the upper peripheral wall 500 and the ball part bottom wall 11 -It is contained in the water collecting channel 9 made of BR> \ and it is transported to the trap passage 13A, so that the floor is not soiled, and the operation and effect are the same as those of the above embodiments.

  The fifth embodiment of FIG. 8 relates to a flush toilet, and the urine droplets flowing down the outer peripheral wall of the upper end portion are surely accommodated in the water collecting passage 29 and collected in the ball portion so that the floor is not soiled. Is exactly the same.

  Example 6 of FIG. 9 relates to a flush urinal and has the same configuration as the flush urinal of Example 1 as a whole, and the description is also common, but the feature of this example is that of the peripheral wall 4 of the ball portion 3. The upper end 5 has an overflow opening 6 that is open upward at substantially the center in the width direction and extends substantially the entire length of the upper end portion 5; The upper end surface of the upper end portion is drawn inward with a slightly larger curvature and an outer peripheral wall continuously descending in a curved surface on the upper surface of the mountain shape outside the overflow port 6. It connects with the water collection channel 9 mentioned above in Example 1 through the drawing-in part which consists of a curved surface.

  The wash water supplied from one water supply part 15 at the top of the receiving surface part 2 to one end or both ends of the water flow path 7 through, for example, a water supply path 16 provided inside the side wall of the receiving surface part 2 has a full side edge of the overflow port 6. It overflows beyond it. In this case, if the overflow port 6 is set to the center in the width direction of the upper surface of the upper end portion 5 and the inner and outer upper surface halves are provided symmetrically, the overflow also occurs uniformly on the inside and outside of the peripheral wall. The washing water overflowing to the inner side of the upper end of the ball portion peripheral wall becomes a water film flow, cleans and flows down the inner peripheral wall, and falls from the lower end of the inner peripheral wall to the inner peripheral surface of the ball portion. The washing water overflowing to the outside of the upper end flows along the half of the upper surface of the outer surface, forming a water film due to its hydrophilicity, and flows down along the outer peripheral wall and the lead-in portion that continue with a gentle curve. 9 is carried to the inner peripheral surface of the ball part. Thus, the wash water that has washed the outer surface of the upper end of the peripheral wall of the ball part that forms part of the drainage system of the flush urinal merges with the wash water in which the inner surface of the upper end is washed and the ball part 3 in the same way. 13 and discharged from the discharge port 14.

  In Example 7 of FIG. 10, this invention is applied to the attachment form which can be attached or detached with respect to the upper end part of the ball | bowl part in the drooping receiving part of the existing stall type flush toilet, and the cross section is made into a substantially inverted U shape as a whole. It is formed and placed on the upper end of the ball portion of the urinal. In this case, a so-called rimless type is shown as the ball portion upper end portion R, and the attachment upper end portion M2 having the features of the present invention causes the urine droplet water film flow flowing down the outer peripheral wall 65a having a curved surface on the upper surface 65 to the inner surface of the ball portion. It has a collecting channel 69 that leads. The outer peripheral wall 65 b has a curved surface formed at least on the surface with a hydrophilic surface material and continues to the drawing-in portion 65 c to reach the water collection opening 68. The water film flow from the outer peripheral wall 65 b accommodated in the water collection opening 68 flows through the water collection channel 69 and flows through the water collection outlet 70 to the inner surface of the ball portion. The lower part of the water collecting channel 69 includes an outer wall leg 71 and an inner wall leg 72, and the mounting upper end M2 is placed across the ball part upper end R with these both legs.

  Through all the embodiments 1 to 7 described above, the material constituting the flush toilet or the mounting upper end having the characteristics of the present invention may be any of pottery, synthetic resin, and metal. The portion from the top surface of the upper end portion to the water collection opening from the top surface of the upper end portion, through the outer peripheral wall to the water collection opening, or the material having the desired hydrophilicity or a surface treatment that has the desired hydrophilicity is applied. It is desirable to use

  As described above, the flush toilet according to the present invention, including urinals and toilets, is not conventionally washed with flush washing water, and the upper end of the peripheral wall of the ball portion where dirt due to scattered urine drops accumulates every time it is used. Since the urine droplets flow into the water film and flow along the inner peripheral wall of the upper end and can be accommodated in the ball or drainage system, the toilet bowl is used not only for general households but also in all kinds of public facilities. As such, the utility value in reducing hygiene and human cleaning work is extremely high. Even if the amount of the cleaning water used is viewed, the economic efficiency is maintained because it can be the same as or less than the conventional inner surface cleaning water by passing water through the rim of the ball portion. Moreover, even if the urine droplets flowing down the inner and outer peripheral walls are washed with washing water, they can be accommodated in the ball part or in the drainage system, so that the cleaning performance around the toilet is greatly improved.

The longitudinal cross-sectional view of the flush toilet which shows Example 1 of this invention The fragmentary sectional view which shows 1st Embodiment of the ball | bowl part upper end part of Example 1 of this invention The fragmentary sectional view which shows 2nd Embodiment of the ball | bowl part upper end part of Example 1 of this invention The fragmentary sectional view which shows 3rd Embodiment of the ball | bowl part upper end part of Example 1 of this invention Partial sectional view of a flush toilet showing Example 2 of the present invention Partial sectional view of a flush toilet showing Example 3 of the present invention The longitudinal cross-sectional view which abbreviate | omitted a part of flush toilet which shows Example 4 of this invention The longitudinal cross-sectional view of the flush toilet which shows Example 5 of this invention The longitudinal cross-sectional view of the flush toilet which shows Example 6 of this invention The longitudinal cross-sectional view of the attachment upper end part which shows Example 7 of this invention

DESCRIPTION OF SYMBOLS 1 Flush urinal 2 Receiving surface part 3 Ball part 4 Circumferential wall 4b Outer peripheral peripheral wall 4c Water collecting channel covering 4d Lower peripheral wall upper end 5 Upper end part 5b Outer peripheral wall surface 5c Retraction part 5d Slope bottom surface 5f Inner peripheral wall 5g Lower end of upper peripheral wall 6 Overflow port 7 8 Water collection opening 9 Water collection path 10 Water collection outlet 11 Bottom wall 12 Drainage port 13 Trap 14 Drainage port 15 Water supply part 16 Water supply path 21 Flush toilet 23 Ball part 24 Peripheral wall 24a Peripheral wall end part 25 Upper end part 28 Water collection opening 29 Collection Waterway 30 Water collection outlet 31 Bottom wall 32 Drainage port 33 Trap 34 Drainage port 35 Water supply part 36 Water level control means 37 Toilet seat M2 Mounting upper end part 65 Upper surface 68 Water collection opening 69 Water collection path 70 Water collection outlet 71 Outer wall leg 72 Inner wall leg 400 Lower part Perimeter wall 500 Upper perimeter wall

Claims (5)

In a flush toilet comprising a flushing system that supplies flush water to the entire inner surface including the ball part of the flush toilet or flush toilet, and a drainage system that discharges flush water concentrated in the ball part to the outside from the drain outlet at the bottom,
A water collecting channel that opens to the inner surface of the ball portion by drawing the outer peripheral surface that is continuous with the upper end surface and the curved surface inwardly and substantially parallel to the upper end surface of the ball portion circumferential wall from the upper end surface of the ball portion peripheral wall. The urine droplets, which are placed below and scatter and adhere to the upper end surface of the ball section peripheral wall during urination, flow down into the water collection channel while maintaining contact with the outer peripheral wall surface, and can be collected in the ball section or drainage system. Flush toilet.   A flush-type urinal or a urinal, where the urinal is located at the lower part of the urine receiving surface, and the urinal is located at the lower part of the toilet seat and the upper surface is opened from the upper peripheral wall forming the upper end and the bottom of the ball part. At the height position where the outer diameter of the upper peripheral wall is smaller than the upper end of the ball part, the lower peripheral wall outer surface of a part or almost the entire circumference is directly below or directly below the outer peripheral surface of the upper upper end of the upper peripheral wall. A water collecting channel is formed on the inner side by arranging a gap with a width that does not hinder the flow of urine droplets flowing down the outer peripheral surface of the upper peripheral wall, and the urine droplets flowing down the outer peripheral wall surface of the ball portion are in contact with the outer peripheral wall surface. The flush toilet according to claim 1, wherein the flush toilet bowl can be stored and accommodated in the ball portion.   The peripheral wall that forms the upper end of the ball part forms substantially the entire ball part, and the outer peripheral wall of the drainage system that forms the drainage system below the ball part opens the side at a height that does not interfere with the drainage of the wash water. The drainage system outer peripheral wall surface is disposed directly below or inside the outer peripheral surface of the upper end of the upper peripheral wall with a gap having a width that does not hinder the flow of urine droplets flowing down the outer peripheral wall surface of the ball portion. 2. A flush toilet according to claim 1, wherein urine drops flowing down the outer peripheral wall surface of the ball portion can be accommodated in the drainage system.   The cleaning system includes a water passage extending along the upper end of the peripheral wall surrounding the opening of the ball portion, and an overflow opening that communicates with the inside of the water passage in the entire length of the water passage and opens to the surface of the substantially upper length of the upper end. The wash water supplied to the water passage overflows from the overflow port to form a water film flow that cleans the upper end surface, and the drainage system has an upper end portion that causes the overflow water film flow to flow down from the upper end surface following the overflow port. The outer wall of the drainage system includes at least one of the inner wall and the outer wall of the outer wall and is drawn inward at least below the water passage to open along the entire length of the overflow port and flow down the outer wall. The flush toilet according to claim 1, wherein a water collecting channel is provided so as to accommodate the water film flow to be conducted and to lead to the drainage system while maintaining contact with the outer peripheral wall surface.   2. The water collecting channel is provided in a separate mounting upper end that covers the upper end of the peripheral wall of the bowl portion of the toilet bowl and is detachable from the outer peripheral surface to the inner periphery of the mounting upper end. Flush toilet.

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