JP2006068279A - Bathtub - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bathtub which has a surface comprising a water-attracting surface section and a water-repellent surface section, improves drainage in the bathtub, and is prevented from slipping. <P>SOLUTION: A water-attracting coating film 23 of water-attracting paint is formed in mostly horizontal faces of a bath 10, a water-repellent coating film 26 of water-repellent paint is formed in mostly vertical faces of the bath 10, resin beads 24 and aluminum oxide particles 25 are mixed in the water-attracting coating film 23, then, the drainage of whole surface in the bath is improved and especially the horizontal faces of the bathtub are made hard to slide, and people can bathe safely. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bathtub with improved slip prevention and drainage.

  Conventionally, this type of bathtub has been provided with an anti-slip member provided on the bottom surface of the bathtub to form a non-slip (see, for example, JP-A No. 2004-86103).

FIG. 8 (a) shows a cross section of a conventional bathtub described in JP-A No. 2004-133405, and (b) shows a detailed cross section of a portion A of (a). As shown in the figure, a recess 3 is provided on the bottom surface 2 of the bathtub 1, and a separate slip prevention member 4 is detachably fitted in the recess 3. The anti-slip member 4 has a rubber or other cushion sheet pasted on the back of the ceramic tile. The anti-slip member 4 protrudes from the bottom of the bathtub 1 in a state of being fitted into the recess 3, and even if the user puts it on, the protrusion prevents slipping. It is the structure which prevents.
JP 7-241250 A

  However, since the conventional configuration is a configuration in which a recess is provided on the bottom of the bathtub and a removable anti-slip member is fitted, there is no anti-slipping effect except for the protrusion of the anti-slip member, and many anti-slip members are installed. There was a need to do. Further, the possibility that the entire sole of the user's foot is placed on the anti-slip member is low, which is insufficient as anti-slip. Furthermore, since it is made detachable, the shape becomes complicated, the cleaning performance of the user is lowered, and the drainability is not improved.

  This invention solves the said conventional subject, and comprises a bathtub surface from a hydrophilic part and a water-repellent part, and aims at improving the drainage property in a bathtub and providing slip prevention.

  In order to solve the conventional problem, the bathtub of the present invention is provided with a water repellent surface portion and a hydrophilic surface portion on at least a part of the bathtub surface.

  As a result, the water-repellent surface is a water-repellent surface, making it easier for water to flow, and the surface that is difficult for water to flow and the surface that supports the weight of the user with hands and feet to the hydrophilic surface to improve drainage. However, it is possible for the user to take a safe bath without slipping when using the bathtub.

  In the bathtub of the present invention, the surface on which water easily flows is a water-repellent surface portion, and the surface on which the water does not easily flow and the surface on which the user supports weight with hands and feet is the hydrophilic surface portion. While improving the performance, it is possible for the user to take a safe bath without slipping when using the bathtub.

  1st invention makes at least one part of the bathtub surface into the bathtub provided with the water-repellent surface part and the hydrophilic surface part, makes the surface where water flows easily into the water-repellent surface part, makes water flow more easily, The surface that is difficult to flow and the surface on which the user supports his / her weight with his / her hands and feet are made hydrophilic, so that the user can slip safely when using the bathtub while improving drainage.

  In the second invention, in particular, by making at least a substantially horizontal surface of the bathtub of the first invention a hydrophilic surface portion, water is particularly difficult to flow and stays, and the horizontal surface that supports the weight of the user with hands and feet is hydrophilic. By setting it as the surface portion, it is possible to prevent water from staying and to allow the user to take a safe bath without slipping when using the bathtub.

  According to the third aspect of the invention, in particular, at least one of the water-repellent surface portion or the hydrophilic surface portion of the bathtub of the first or second aspect is formed of a bath base material, and the other is formed by a coating process. Molding the bathtub with a material with the other property, the part of the other characteristic can be easily made water-repellent or hydrophilic in any place by post-processing, improving the drainage at a low cost and preventing the user from slipping when using the bathtub A bathtub that can be safely bathed can be provided.

  The fourth aspect of the invention is particularly a hydrophilic coating that is a hydrophilic surface portion by forming the hydrophilic surface portion of the bathtub according to any one of the first to third embodiments by a hydrophilic coating treatment and mixing particulate matter into the coating material. It is possible to provide a bathtub in which irregularities of the size of the particulate matter are formed on the surface, the frictional resistance is increased, and the user can slip safely when using the bathtub and can be safely bathed.

  In the fifth invention, in particular, the particulate material of the fourth invention is mixed with at least two kinds of particulate materials having different particle diameter ranges, so that the particulate matter 2 is added to the hydrophilic coating surface which is a hydrophilic surface portion. A well-balanced unevenness due to the size of the kind of particulate matter can be formed, the frictional resistance can be increased, and the user can provide a bathtub that can be safely bathed without slipping when using the bathtub.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a partial perspective view of a bathroom using a bathtub according to the first embodiment of the present invention.

  In FIG. 1, the bathtub 10 is installed so that the area from the washing place 12 of the bathroom 11 to the upper creepage surface 13 of the bathtub 10 has a predetermined height. The height of the upper creepage surface 13 of the bathtub 10 is preferably about 350 to 500 mm from the washing place 12, but the optimum range is 400 to 450 mm, and the system bus is designed in this range. As a bathing aid to the bathtub 10, a grip bar 15 is attached to the wall 14 and a hand grip 17 is attached to the longitudinal side surface 16 of the bathtub 10.

  A short cross-sectional view of the bathtub 10 is shown in FIG. The bathtub 10 is mainly composed of reinforced plastic (hereinafter abbreviated as FRP), the upper creeping surface 13 and the bottom surface 18 are substantially horizontal surfaces, have a gradient of 0 to 10 °, and are designed so that water does not accumulate. ing. Similarly, the armrest surface 19 is a substantially horizontal plane so that the elbow does not slip, and has an inclination of 0 to 10 ° so that water does not accumulate.

  A longitudinal sectional view of the bathtub 10 is shown in FIG. In FIG. 3, the step surface 20 is used as a foothold when the user sits down when taking a half-bath or enters or exits the bathtub, and is configured in a substantially horizontal plane so that it does not slip when sitting on the legs or sitting, so that water does not accumulate. It has a slope of 0-10 °.

  The substantially vertical surfaces of the bathtub 10 are the long side surface 16, the short side surface 21, the outer edge surface 22, and the like, and are naturally joined to the substantially horizontal surface by a curved surface.

  A hydrophilic paint is applied to the surfaces of the upper creeping surface 13, the bottom surface 18, the armrest surface 19, and the step surface 20, which are substantially horizontal surfaces, and a hydrophilic coating portion 23 forms a hydrophilic surface portion.

A partial cross-sectional view of the hydrophilic coating film 23 is shown in FIG. The hydrophilic paint is a two-component mixed paint base material 23a composed of a urethane-based main material and a curing agent, resin beads 24 having a particle size of 500 μm or less as an additive, and particles as a particulate substance. Aluminum oxide (Al ₂ O ₃ ) particles 25 having a diameter of 0.1 to 500 nm are mixed.

  The resin beads 24 and the aluminum oxide particles 25 are mixed in a ratio of 1 to 50% by weight with respect to the paint base material 23a. The resin beads 24 have a particle diameter of 500 μm or less, and in the hydrophilic coating film 23 having a film thickness of 1 to 200 μm, moderate unevenness is formed on the surface of the hydrophilic coating film 23 and functions as a slipper for the user. The resin beads 24 and the aluminum oxide particles 25, which are particulate materials, are harder than the coating base material 23a, and are coated so that the entire hydrophilic coating film 23 is not worn even when the surface of the hydrophilic coating film 23 is rubbed with a hard material. It also serves as a membrane protection.

  Since the aluminum oxide particles 25 have a particle diameter of 0.1 to 500 nm, they are dispersed in the paint and have a size different from the unevenness formed by the resin beads 24 including the surface of the resin beads 24. Concavities and convexities can be formed, and the frictional resistance can be further increased, so that the surface of the upper creepage surface 13, the bottom surface 18, the armrest surface 19, and the step surface 20 where the user frequently loads during bathing is less likely to slip and improves safety. It is possible to improve the hydrophilicity by the hydrophilic performance of the aluminum oxide particles 25, and even in a low gradient where water does not flow easily, there is no water pool and water drainage performance is improved. Reduction of the friction coefficient by water can be avoided, safety is improved and drying is performed. Performance is also improved. The hydrophilicity here is preferably 40 ° or less in terms of the contact angle of water, and if it is 30 ° or less, the effect is greater, but the optimum range varies depending on the bathtub shape and the like.

  Further, the aluminum oxide particles 25 have higher hardness than the resin of the coating substrate 23a constituting the resin beads 24 and the hydrophilic coating film 23 and are sufficiently dispersed in the hydrophilic coating film 23, so that the wear resistance is improved. It also has the effect of improving.

  The long side surface 16, the short side surface 21, the outer edge surface 22 and the like, which are substantially vertical surfaces, form a water-repellent surface portion with a water-repellent coating 26 made of water-repellent coating on the surface of the bathtub base material. Fluorine paint is used. Accordingly, the surface tension is reduced on the substantially vertical surface on which the water repellent coating film 26 is formed, and almost no water droplets remain, and it is difficult to get dirt such as scales. Even if it is attached, the dirt can be removed with a simple wipe. be able to. In particular, the effect of the long side surface 16 and the short side surface 21 where the water line that is likely to get dirty is noticeable appears. The water repellency here is preferably 60 ° or more in terms of the contact angle of water, and if it is 80 ° or more, the effect is greater, but the optimum range varies depending on the bathtub shape and the like.

  In this embodiment, the paint is a urethane paint. However, an acrylic or epoxy two-component mixed paint may be used. If there is no problem with the adhesion of the paint, a one-component paint may be used. Similar effects can be obtained.

  In addition, resin beads are used as the particulate matter, but the same effect can be obtained as long as the relationship with the thickness of the coating film is satisfied even with a glass bead or a non-spherical material.

  In addition, the sizes of the two types of particulate matter are optimal in the combination of the present embodiment, but the optimum ranges differ depending on the particle material and the like.

  Furthermore, even when particles other than aluminum oxide particles are combined with silicon oxide having a hydrophilic property as well as a particle size on the order of nm, the same effect can be obtained by optimizing the uneven shape, and particles on the order of nm. The same effect of improving the wear resistance can be obtained by mixing the inorganic particulate matter having a diameter.

(Embodiment 2)
A short cross-sectional view of the bathtub 27 of the second embodiment of the present invention is shown in FIG. 5, and a longitudinal cross-sectional view thereof is shown in FIG. In the present embodiment, only differences from the first embodiment will be described.

  The bathtub base 28 of the bathtub 27 is FRP, and a water repellent additive is mixed in the resin to make the resin water repellent. Although the level of decrease in surface tension is slightly inferior to surface coating with fluorine paint or the like, the surface tension is lower than that of general FRP. If the material has the same level of surface tension, it is not necessary to mix a water repellent additive. For example, the surface portion of the bathtub base 28 of the bathtub 27 is formed by vacuum-forming an acrylic sheet having a suitable surface tension. It doesn't matter.

  The hydrophilic surface portion is formed by a hydrophilic coating film 29 made of a hydrophilic paint, and the range thereof is a substantially horizontal surface portion of the bathtub 27 shown in FIGS. 5 and 6. A water repellent surface portion is formed on the surface.

  FIG. 7 is a partially enlarged cross-sectional view of the hydrophilic coating film 29. The difference from the first embodiment is that the particulate matter mixed in the paint base material 29a is changed from the resin beads of the first embodiment to the hollow portion 30a. It is the point which changed into the glass bead 30 which has. Since this configuration increases the hardness of the resin beads 24, the wear resistance is further improved, and since the hollow portion 30a is provided inside, the air layer has a large heat capacity and heat insulation. The surface temperature of the hydrophilic coating film 29 in the bathtub is easily maintained by the air once warmed at the time of bathing, and the drying time can be shortened.

  The rest of the configuration is the same as that of the first embodiment and has the same effects.

  Further, in this embodiment, two kinds of particulate matter are added to the hydrophilic paint in a range of different sizes, but the synergistic effect of preventing slippage is small even in the equivalent range, but the same effect can be obtained. it can. In addition, if any one of the particulate substances is ensured to be hydrophilic, a synergistic effect cannot be obtained, but a coating film that is not slippery, has good drainage properties, and has improved wear resistance can be formed.

  As described above, in the bathtub according to the present invention, the surface on which water easily flows is a water-repellent surface portion, and the surface on which the water does not easily flow and the surface on which the user supports his / her weight with his / her hands and feet. The hydrophilic surface portion improves drainage and allows the user to take a safe bath without slipping when using the bathtub, and can also be applied to the use of water facilities having similar shapes such as kitchens and toilets.

The perspective view of the system bus in Embodiment 1 of this invention Short section view of bathtub in embodiment 1 of the present invention Longitudinal sectional view of a bathtub according to Embodiment 1 of the present invention The coating-film partial sectional view of the bathtub in Embodiment 1 of the present invention Short sectional view of a bathtub in Embodiment 2 of the present invention Longitudinal sectional view of a bathtub according to Embodiment 2 of the present invention The coating-film partial sectional view of the bathtub in Embodiment 2 of this invention (A) Longitudinal sectional view of a conventional bathtub (b) Detailed sectional view of part A

Explanation of symbols

10, 27 Bathtub 28 Bathtub base material (water repellent surface)
23, 29 Hydrophilic coating (hydrophilic surface)
24 Resin beads (particulate matter)
25 Aluminum oxide particles (particulate matter)
26 Water repellent coating (water repellent surface)
30 Glass beads (particulate matter)

Claims (5)

A bathtub provided with a water-repellent surface portion and a hydrophilic surface portion on at least a part of the surface of the bathtub. The bathtub according to claim 1, wherein at least a substantially horizontal plane is a hydrophilic surface portion. The bathtub according to claim 1 or 2, wherein at least one of the water repellent surface portion or the hydrophilic surface portion is formed of a bath base material and the other is formed by a coating process. The bathtub according to any one of claims 1 to 3, wherein the hydrophilic surface portion is formed by a hydrophilic coating treatment, and particulate matter is mixed into the paint. The bathtub according to claim 4, wherein the particulate matter is composed of at least two kinds of particulate matter having different particle diameter ranges.

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