JP2006141650A - Toilet seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a toilet seat for suppressing the situation that sewage infiltrates into a gap where a bottom plate provided with a low surface energy layer and a toilet seat main body are fixed and stains are stuck, and easily removing the stains on a toilet seat bottom surface. <P>SOLUTION: The toilet seat is made of a synthetic resin, in which the toilet seat main body 8 is fixed to the bottom plate 7. The boundary part 9 of the bottom plate 7 and the toilet seat main body 8 is provided above the bottom surface of the bottom plate 7, and the bottom plate 7 is provided with the low surface energy layer 6 from the boundary part 9 to the bottom surface 10 and side peripheral surface 11 of the bottom plate 7 excluding the part of a base material exposed surface 26. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a synthetic resin toilet seat, and more particularly to a toilet seat provided with a heater for warming the toilet seat surface inside.

  A toilet-type toilet placed in a Western-style toilet has a toilet seat on the upper surface of the toilet. This toilet seat is usually made of a thermoplastic synthetic resin such as polypropylene resin or ABS resin, and is formed by fixing a bottom plate facing the rim surface of the toilet bowl and a toilet seat body on which a person is seated.

  When using this toilet seat, the bottom plate of the toilet seat is located directly above the toilet bowl via the toilet seat cushion, so the bottom plate bottom surface is sanitary washing reflected by the urine splashes reflected by the toilet bowl surface and the human body Dirty water such as cleaning water of the device adheres and solidifies. Moreover, since the bottom surface of the toilet seat raised when the boy is small is exposed, the splashed urine is applied to the bottom surface and solidifies. In particular, the bottom surface of the bottom plate is difficult to see in normal use, and it is often difficult to notice that dirt is attached, so that it becomes difficult to remove the dirt as time passes. Therefore, in order to improve the cleaning property, as proposed by the present applicant, as shown in FIG. 12, the bottom plate 7 is integrally molded with the antifouling resin film 6 provided with the low surface energy layer. Are known. (For example, refer to Patent Document 1.)

In this toilet seat 4, a boundary portion 9 where the bottom plate 7 of the toilet seat 4 integrally molded with the antifouling resin film 6 and the toilet seat body 8 are fixed is located facing the rim surface 33 of the toilet bowl 1. Sewage such as urine is infiltrated into the gap of the boundary portion 9 and solidifies. Moreover, since the surface energy at the boundary 9 is lower on the antifouling resin film 6 side of the bottom plate 7 than on the toilet seat body 8 side, the sewage adhering to the boundary 9 is repelled on the antifouling resin film 6 side. Familiarity with the 8 side, the sewage moves to the toilet seat body 8 side, and the sewage gradually enters and solidifies due to surface tension into the gap between the boundary portions 9 where the bottom plate 7 and the toilet seat body 8 are fixed. Therefore, when the dirt adhering to the bottom plate 9 is wiped off with a rag or the like, even if the dirt adhering to the portion covered with the antifouling resin film 6 is easily wiped away, the infiltrated and solid dirt remains in the gap of the boundary portion 9. It was unsanitary.
JP 2003-093271 A

  The present invention has been made to solve the above problems, and the problem of the present invention is that dirty water enters the gap between the bottom plate provided with the low surface energy layer and the toilet seat body and the dirt solidifies. An object of the present invention is to provide a toilet seat that can be suppressed and easily cleaned by wiping and cleaning.

  In order to solve the above problems, the toilet seat of the first invention of the present application is a synthetic resin toilet seat in which the toilet seat body is fixed to the bottom plate, and the boundary between the bottom plate and the toilet seat body is above the bottom surface of the bottom plate. In addition to being provided on the peripheral surface, the bottom plate is provided with a low surface energy layer over the bottom surface and side peripheral surface of the bottom plate excluding a predetermined width from the boundary portion.

  By comprising in this way, the boundary part which fixed the toilet seat baseplate and the toilet seat main body does not directly face a toilet bowl, and the sewage reflected on the toilet bowl surface is not easily applied to the boundary part. In addition, since the base resin of the bottom plate is exposed between the boundary portion where the bottom plate of the toilet seat and the toilet seat body are fixed and the low surface energy layer of the bottom plate, it adheres to the periphery of the low surface energy layer of the bottom plate. Sewage is repelled by the low surface energy layer and adheres to the exposed base resin part of the base plate, but the sewage does not directly touch the gap between the bottom plate of the toilet seat and the toilet seat body. .

  Therefore, the sewage is prevented from entering and solidifying in the gap between the boundary portion where the bottom plate of the toilet seat and the toilet seat body are fixed, and the dirt attached to the portion covered with the low surface energy layer among the stains attached to the bottom plate is Easy to wipe off.

  A resin film with a low surface energy layer provided on one side of the film substrate made of the same material as the base resin that forms the bottom plate is molded into the surface shape of the bottom plate and then trimmed to form a single piece on the bottom plate. It is preferable that the layer is exposed and fixed to the bottom plate, and in this way, the portion where the base resin having a predetermined width on the peripheral surface of the bottom plate is exposed can be surely secured, and the resin film and the bottom plate can be secured during integral molding. It is possible to prevent the adhering portions of the two parts from welding together without any gaps, and to prevent filthy water from entering between them, and the resin film does not peel off when cleaning the toilet seat, and can exhibit antifouling properties over a long period of time.

  Insert the leg of the toilet seat cushion into the insertion hole provided in the bottom plate, provide an opening in the resin film that is smaller than the planar shape of the toilet seat cushion and larger than the leg, and fix the toilet seat cushion to the bottom plate with the resin film in between Preferably, the toilet seat cushion can be fixed in the same procedure as before, and the difficulty in removing the toilet seat cushion can be maintained.

  The base resin of the base plate and the film base of the resin film are preferably made of polypropylene resin, and the thickness of the resin film is preferably set to 500 μm or more. In this way, the polypropylene resin that forms the base plate is used as a mold during integral molding. When injected, it is possible to prevent the trimmed resin film mounted in advance in the mold from being deformed by the injection pressure.

  It is preferable to make the peripheral part of the resin film and the bottom plate surface substantially flush with each other. By doing so, there is no catching part, and it is possible to smoothly wipe and clean, and it is also possible to prevent dirt from collecting on the peripheral part of the resin film. .

  In order to solve the above problems, the toilet seat of the second invention of the present application is a synthetic resin toilet seat in which a toilet seat body provided with a heater is fixed to a bottom plate having a bottom surface and a side peripheral surface, and the bottom plate Is formed by integrally molding a laminated resin film having a low surface energy layer on the surface of the base resin constituting the bottom plate to make the bottom surface of the bottom plate a water repellent surface, and at the upper end of the side peripheral surface of the bottom plate The water-repellent surface is not formed, and a portion where the base resin is exposed is formed.

  By comprising in this way, the boundary part which fixed the toilet seat baseplate and the toilet seat main body does not directly face a toilet bowl, and the sewage reflected on the toilet bowl surface is not easily applied to the boundary part. Moreover, since the base resin of the bottom plate is exposed between the boundary portion where the bottom plate of the toilet seat and the toilet seat body are fixed and the low surface energy layer of the bottom plate, the sewage adhering to the periphery of the low surface energy layer of the bottom plate is Although it is repelled by the low surface energy layer and adheres to the upper end portion of the exposed bottom plate, the sewage does not directly touch the gap between the bottom plate of the toilet seat and the toilet seat body.

  Therefore, the sewage is prevented from entering and solidifying in the gap between the boundary portion where the bottom plate of the toilet seat and the toilet seat body are fixed, and the dirt attached to the portion covered with the low surface energy layer among the stains attached to the bottom plate is Easy to wipe off.

  If a silicone-based resin layer or a fluorine-based resin layer is used as the low surface energy layer, the bottom surface of the bottom plate of the toilet seat exhibits oil repellency in addition to water repellency. It will be easier to drop.

  A toilet seat cushion leg is inserted into an insertion hole provided in the bottom plate, an opening is formed in the resin film that is smaller than the planar shape of the toilet seat cushion and larger than the leg, and the toilet seat is sandwiched between the resin film and the toilet seat. It is preferable to fix the cushion. By doing so, the toilet seat cushion can be fixed in the same procedure as before, and the toilet seat cushion is inserted into the base resin portion of the bottom plate. The difficulty of falling off can be maintained.

  According to the present invention, it is possible to suppress the infiltration and fixation of sewage into the gap between the bottom plate provided with the low surface energy layer and the toilet seat body, and to easily remove the dirt.

Hereinafter, the present invention will be described in detail with reference to the drawings.
1 is an external perspective view of a sanitary washing apparatus equipped with the toilet seat of the present invention, FIG. 2 is a rear view of the toilet seat, FIG. 3 is an enlarged sectional view of a portion A in FIG. 2, and FIG. FIG. 5 is a cross-sectional view taken along the line BB in FIG. 2, FIG. 6 is an enlarged cross-sectional view of the resin film used in the present invention, and FIG. 7 is a schematic view of the resin film vacuum-formed into a toilet seat bottom plate shape. 8 is a schematic diagram for trimming the resin film formed in FIG. 7, FIG. 9 is a schematic diagram for integrally molding the trimmed resin film and the bottom plate, FIG. 10 is a flowchart showing the processing steps, and FIG. It is a table | surface which shows the condition when different resin films are integrally molded with a baseplate.

  In FIG. 1, a toilet seat 4 and a toilet lid 5 are rotatably mounted on a main body 3 of a sanitary washing device 2 having a washing nozzle and a drying device (not shown) installed in the upper surface of the toilet 1. .

  The toilet seat 4 is a heating toilet seat having a heater 36 therein, and is covered with a water-repellent resin film 6 as shown in FIGS. 2, 3, and 4, and the base resin is a polypropylene resin (hereinafter referred to as PP resin). ) A bottom plate 7 having a bottom surface and a side peripheral surface made of the same material and a toilet seat body 8 made of the same material, and a boundary portion 9 between the bottom plate 7 and the toilet seat body 8 is positioned on a side peripheral surface 11 above the bottom surface 10 of the bottom plate 7. Thus, the protrusion 12 provided on the inner side of the side peripheral surface 11 of the bottom plate 7 and the stepped portion 13 of the toilet seat body 8 are fixed by a method such as vibration welding.

  As shown in FIG. 6, the resin film 6 having water repellency is transparent and has a base layer 14 having a thickness of about 500 μm mainly composed of PP resin and a first adhesive such as a dry laminating agent on the upper surface. Through an intermediate layer 16 having a thickness of about 50 μm mainly composed of a PP resin that can be applied with a silicone resin, and an adhesive layer 17 formed by corona discharge treatment or the like on the surface of the intermediate layer 16. About 5 μm thick silicone-based resin layer (low surface energy layer having a surface energy of 25 mN / m or less) 18. A film substrate is formed in advance by the substrate layer 14 and the intermediate layer 16, and a silicone resin is applied to one surface of the film substrate to form the resin film 6. Note that the base material layer 14 and the intermediate layer 16 may be directly heat-welded without using the first adhesive layer 15.

  The base material layer 14 and the intermediate layer 16 are homopolymers such as propylene, ethylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-nonene, 1-decene, 3-methyl, 1-butene. Alternatively, the main component is a polypropylene-based thermoplastic resin such as a copolymer thereof, and the melting point of the base material layer 14 is lower than the melting point of the intermediate layer 16 by about 5 ° C. or more. When the difference in melting point is less than 5 ° C., the base material layer 14 and the intermediate layer 16 are melted at substantially the same timing due to the heat of the melted PP resin when integrally molded with a PP resin bottom plate, which will be described later, and the silicone resin Layer 18 will be damaged. If there is a difference of about 5 ° C. or more in the melting point, the base material layer 14 is melted first, and the intermediate layer 16 is melted after a predetermined time lag, but the intermediate layer 16 is cooled before being melted. 16 is prevented from being melted and the silicone resin layer 18 is not damaged. Note that the base layer 14 on the low melting point side is melted by the heat of the melted PP resin and is well melted with the melted resin to obtain strong adhesion. Moreover, the base layer 14 is made of polypropylene resin, and the bottom plate 7 and Because they are the same material, they are completely fused and integrated.

  In this embodiment, the low surface energy layer is a silicone resin layer 18 having water repellency with a contact angle with water of 100 degrees or more and oil repellency with a contact angle with oleic acid of 50 degrees or more. The resin layer 18 may be a thermosetting silicone using a platinum catalyst, an ultraviolet curable silicone using an ultraviolet excitation cation generator as a catalyst, or may be diluted in a solvent and applied to the surface of the intermediate layer 16 and cured. Forming. If it has water repellency, it is difficult for dirt to adhere to sewage mainly composed of water such as urine, and if it has oil repellency, the sewage that washed the human body is reflected by the human body, The oil component contained is contained, but this oil component is also repelled and dirt is hardly adhered. Even if a fluorine-based resin such as PTFE or PFEP is used as the low surface energy layer, the effects of water repellency and oil repellency can be obtained as with the silicone resin.

  The total thickness of the resin film 6 is 500 μm to 1000 μm, preferably 550 μm to 650 μm. If it is 1000 μm or more, the “strain” of the resin film 6 is too strong, and the resin film 6 to be described later has a good surface shape on the bottom plate 7. Vacuum forming is not possible, and if it is 400 μm or less, the “strain” of the resin film 6 is weak, and “wrinkles” are generated in the resin film 6 when integrally molded with the bottom plate 7 described later. FIG. 11 shows the thickness of the resin film 6 and the state of occurrence of “wrinkles”.

Next, a method for forming the resin film 6 and the bottom plate 7 will be described.
As shown in FIG. 7, the flat resin film 6 is placed in a vacuum molding die 20 provided with a cavity 19 that follows the bottom shape of the bottom plate 7 so that the silicone resin layer 18 is located on the surface side of the cavity 19. Are placed facing each other and vacuum formed. In addition to the vacuum forming method, the surface shape of the bottom plate 7 may be formed by a vacuum / press forming method or a vacuum / pressure forming method.

  Next, the molded resin film 6 is cut (trimmed) by using the Thomson blade 21 to cut an excess rising portion of the peripheral edge portion 22 of the resin film 6. The resin film 6 is formed in advance on the surface shape of the bottom plate 7 by such processing steps.

  Thereafter, the resin film 6 formed on the surface shape of the bottom plate 7 is set in the cavity 24 of the injection mold 23 so that the silicone resin layer 18 is positioned on the surface side of the cavity 24, and the melted PP resin. 25 is injection molded to integrally mold the resin film 6 and the bottom plate 7. Next, the bottom plate 7 integrally formed with the resin film 6 and the toilet seat body 8 that is pre-formed and fitted with a heater 36 or the like on the inner surface are fixed and integrated together by a method such as vibration welding, heat welding, or ultrasonic welding. 4 is formed. The processing steps described above are shown in FIG.

  Thus, since the entire bottom surface 10 of the bottom plate 7 is covered with the resin film 6 having water repellency, antifouling property can be imparted to the bottom surface of the bottom plate 7. Further, the peripheral edge portion 22 of the resin film 6 extends upward along the side peripheral surface 11 of the bottom plate 7 to cover a position slightly below the boundary portion 9 with the toilet seat body 8, and the tip of the peripheral edge portion 22 is an exposed bottom plate. 7 is substantially flush with the surface of the PP resin portion or a level difference of 0.3 mm or less. That is, the bottom plate 7 is covered with the resin film 6 on the bottom surface 10 and the side peripheral surface 11 excluding the substrate exposed surface 26 from the boundary portion 9. The silicone resin layer 18 is exposed on these surfaces, and the substrate of the bottom plate 7 is exposed. PP resin is exposed on the exposed surface 26, the boundary portion 9, and the toilet seat body 8 surface. The tip of the peripheral edge portion 22 of the resin film 6 is made substantially flush because if there is a step of 0.3 mm or more, a rag is caught on the edge, or dirt is accumulated on the step portion. It is because it becomes conspicuous and unsightly in appearance.

  The width of the substrate exposed surface 26 is about 0.5 mm to 5 mm, preferably 1 mm to 2 mm. If it is 0.5 mm or less, it is too close to the boundary portion 9, and the sewage adhering to the water-repellent resin film 6 is repelled and easily enters the gap of the boundary portion 9. Processing to integrally form the film 6 is difficult. In addition, when the base plate exposed surface 26 does not have a width dimension and the peripheral edge 22 of the resin film 6 protrudes upwards as much as possible, when the bottom plate 7 and the toilet seat body 8 are fixed, the end surface of the toilet seat body 8 is the resin film. 6 and the resin film 6 protrudes outwards and looks bad. In addition, the sewage enters between the protruding resin film 6 and the toilet seat body 8 and the end surface of the resin film 6 hits the human body. Inconvenience such as there will occur. In order to avoid this, cutting the protruding portion of the resin film 6 leads to an increase in cost. Moreover, when the width dimension of the base-material exposed surface 26 is 5 mm or more, the area to which sewage adheres becomes large correspondingly, and dirt is conspicuously undesirable. Therefore, it is preferable to form the substrate exposed surface 26 so as to have a predetermined width dimension from the boundary portion 9.

  As shown in FIG. 5, a projection 28 for attaching a synthetic rubber toilet seat cushion 27 is provided in a bulging shape on the bottom surface 10 of the bottom plate 7, and the resin film 6 has a peripheral surface 29 and a top plane 30 of the projection 28. In the resin film 6, an opening 35 smaller than the planar shape of the toilet seat cushion 27 and larger than the leg 31 is formed. In the present embodiment, the opening 35 is substantially flush with the inner peripheral surface of the insertion hole 32 so that the resin film 6 covers the entrance of the insertion hole 32. The bamboo stool-like leg 31 of the toilet seat cushion 27 is inserted and fitted into the insertion hole 32, and the toilet seat cushion 27 is attached to the toilet seat 4 so as to sandwich the resin film 7. The toilet seat cushion 27 is attached to the rim surface 33 of the toilet bowl 1. Abut.

  The toilet seat cushion 27 is not covered with the resin film 6 and the toilet seat cushion 27 is exposed. If the toilet seat cushion 27 is covered with the resin film 6 having a low surface energy layer, the toilet seat 4 and the rim surface 33 of the toilet bowl 1 are exposed. This is because if the frictional resistance becomes too small and the attachment of the sanitary washing device 2 to the toilet 1 becomes too sweet, the toilet seat 4 will slide on the rim surface 33 when a person is seated. Further, the entire inner peripheral surface of the insertion hole 32 is not covered with the resin film 6 because if the entire inner peripheral wall of the insertion hole 32 is covered with the resin film 6, the frictional resistance of the inner peripheral wall of the insertion hole 32 is reduced and the toilet seat cushion 27. This is because the leg portion 31 of the leg is easily removed. Furthermore, the opening end of the resin film 6 is substantially flush with the inner peripheral surface of the insertion hole 32. If the opening 35 of the resin film 6 has a smaller diameter than the insertion hole 32, the bamboo shoot-like leg portion 31 is removed. This is because the leg portion 31 is caught on the end portion of the resin film 6 and cannot be removed.

  Incidentally, as shown in FIG. 5, a relatively gentle curved surface shape is formed from the peripheral surface 29 of the projection 28 to the side surface of the toilet seat cushion 27, so that the hook portion during wiping and cleaning is reduced, so that the bottom plate 7 The bottom surface 10 can be easily wiped and cleaned. Further, since the resin film 6 covers the peripheral surface 29 of the protrusion 28, the top plane 30 and the entrance hole 32 of the leg 31 of the toilet seat cushion 27, the sewage is applied to the protrusion 28 and the side peripheral surface 34 of the toilet seat cushion 27. In this case, dirt on the peripheral surface 29 of the projection 28 can be easily wiped off, but the side peripheral surface 34 of the toilet seat cushion 27 may become dirty or dirty water may enter the gap between the toilet seat cushion 27 and the top plane 30 and become dirty. However, if the dirt on the toilet seat cushion 27 is not easily removed by wiping and cleaning, the toilet seat cushion 27 can be removed and immersed in a detergent solution to remove the dirt, and the dirt on the top plane 30 can be easily wiped off. When the toilet seat cushion 27 is not cleaned, the toilet seat cushion 27 may be replaced.

  The present invention is not limited to the above-described embodiments, and various modifications are possible. For example, a low surface energy resin is applied to the cavity of an injection mold, and the bottom plate is injection molded or diluted with a solvent. It is also possible to apply the cured silicone or the like to a bottom surface or a side peripheral surface of a previously formed bottom plate and cure it. Alternatively, the resin film having a low surface energy layer provided on the bottom plate and the surface may be separately molded, and then both may be fixed using an adhesive or a solvent. ABS resin or the like may be used as the thermoplastic resin for forming the bottom plate.

  The present invention can be used not only for general households but also for heating toilet seats for sanitary washing apparatuses for public toilets such as stations and commercial facilities, as well as ordinary toilet seats without a built-in heater or heater.

It is an external appearance perspective view of the sanitary washing apparatus equipped with the toilet seat of this invention. It is a reverse view of the toilet seat of this invention. It is an expanded sectional view of the A section in FIG. It is an expanded sectional view before the welding process of A part similarly. It is BB sectional drawing. It is an expanded sectional view of the resin film used by this invention. It is a schematic diagram which vacuum-forms the resin film to a toilet seat bottom board shape similarly. It is a schematic diagram which trims the resin film formed in FIG. It is a schematic diagram which integrally molds the trimmed resin film. It is a flowchart which shows a process process. It is a table | surface which shows the condition when the resin film and bottom plate from which thickness differs are integrally molded. It is a reference figure which shows a prior art example.

Explanation of symbols

1: Toilet bowl 2: Sanitary washing device 3: Main body 4: Toilet seat 5: Toilet lid 6: Resin film 7: Bottom plate 8: Toilet seat body 9: Boundary part 10: Bottom surface 11: Side surface 12: Projection 13: Step part 14: Base material layer (film base material)
15: Adhesive layer 16: Intermediate layer (film substrate)
17: Adhesive layer 18: Silicone resin layer (low surface energy layer)
19: Cavity 20: Vacuum mold 21: Thomson blade 22: Peripheral part 23: Injection mold 24: Cavity 25: Molten PP resin 26: Substrate exposed surface 27: Toilet seat cushion 28: Protrusion 29: Circumferential surface 30: Top plane 31: Leg 32: Insertion hole 33: Rim surface 34: Side peripheral surface 35: Opening 36: Heater

Claims (9)

A synthetic resin toilet seat having a toilet seat body fixed to a bottom plate, wherein a boundary portion between the bottom plate and the toilet seat body is provided above a bottom surface of the bottom plate, and the bottom plate has a predetermined width removed from the boundary portion. A toilet seat comprising a low surface energy layer from the bottom surface to the side surface. The low surface energy layer is provided on one surface of a film base material made of the same material as the base resin constituting the bottom plate, and the resin film is formed into a surface shape of the bottom plate and then trimmed to be integrated with the bottom plate. The toilet seat according to claim 1, wherein the toilet seat is molded and exposed to the bottom plate by exposing the low surface energy layer. A toilet seat cushion leg is inserted into an insertion hole provided in the bottom plate, an opening is formed in the resin film that is smaller than the planar shape of the toilet seat cushion and larger than the leg, and the toilet seat is sandwiched between the resin film and the toilet seat. The toilet seat according to claim 2, wherein a cushion is fixed. The toilet seat according to claim 2 or 3, wherein the base resin is a polypropylene resin, and the thickness of the resin film is 500 µm or more. The toilet seat according to any one of claims 2 to 4, wherein a peripheral edge portion of the resin film and a bottom plate surface are substantially flush with each other. A synthetic resin toilet seat in which a toilet seat body provided with a heater is fixed to a bottom plate composed of a bottom surface and side peripheral surfaces, wherein the bottom plate is a base material constituting the bottom plate with a resin film provided with a low surface energy layer on the surface The bottom plate of the bottom plate is formed as a water repellent surface, and a portion where the base resin is exposed without forming the water repellent surface is formed at the upper end portion of the side peripheral surface of the bottom plate. Toilet seat. The toilet seat according to claim 6, wherein the low surface energy layer is a silicone resin layer. The toilet seat according to claim 6, wherein the low surface energy layer is a fluorine resin layer. A toilet seat cushion leg is inserted into an insertion hole provided in the bottom plate, an opening is formed in the resin film that is smaller than the planar shape of the toilet seat cushion and larger than the leg, and the toilet seat is sandwiched between the resin film and the toilet seat. The toilet seat according to any one of claims 6 to 8, wherein a cushion is fixed.

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