Heat-reducing handrail

Abstract

This invention provides a heat-suppressing handrail that can suppress the temperature rise of the handrail in high-temperature environments and strong sunlight while maintaining strength and other properties. [Solution] The heat-suppressing handrail of the present invention comprises a handrail body member, a heat-radiating layer formed on the outer surface of at least the metal portion of the body member, and a protective layer formed on the outer surface of the heat-radiating layer, wherein the heat-radiating layer has a plurality of hollow ceramics and a resin binder connecting the plurality of hollow ceramics, and the heat-radiating layer converts heat from the outside into far-infrared rays and radiates them to the outside.

Description

Technical Field

[0001] The present invention relates to a handrail installed outdoors such as in a residence, and more particularly to a heat suppression handrail that can suppress temperature rise during hot periods.

Background Art

[0002] Outdoors such as in a residence, handrails are often installed to assist walking on stairs, passages, etc. This is to enhance the ease and safety of walking. For the general healthy population, the presence of handrails also improves the ease and safety of walking. However, for the elderly and those with physical disabilities, it can further enhance the ease and safety.

[0003] For example, there may be passages or stairs from the entrance of a residence to the entrance hall. For the elderly and those with physical disabilities, walking on such passages can be accompanied by anxiety and danger. Moreover, when carrying luggage or the like, the anxiety and danger are further heightened.

[0004] In addition, regarding the stairs existing up to the entrance hall, the anxiety and danger during ascending and descending are even higher. To reduce such anxiety and danger, handrails are often installed outdoors such as in a residence.

[0005] Here, from the viewpoints of durability, strength, or workability of the handrail, a part or all of the handrail is made of metal or alloy. Metals and alloys have high thermal conductivity and are easily affected by external temperature and solar radiation. In seasons with high temperatures such as summer, there is a problem that the temperature of the handrail, particularly the metal part of the handrail, rises due to the influence of solar radiation and outside air temperature.

[0006] When such a temperature rise of the handrail occurs, for pedestrians using the handrail, there are risks such as burns, and there is also a problem that walking using the handrail becomes difficult. In particular, due to the influence of recent global warming, the temperature in summer has risen sharply or the hot period has been long, and the problems caused by such a temperature rise of the handrail have become more significant.

[0007] When handrails become hot, there is a risk of burns and other dangers, but there is also concern that pedestrians may walk without properly gripping the handrails because they have experienced them being hot to the touch. In this case, handrails, which are meant to improve the ease and safety of walking, may not be used properly, which could lead to problems such as increased risk of falls while walking or a decrease in the ease of walking, thus defeating their purpose.

[0008] Thus, the rising temperature of handrails installed outdoors, such as those found in homes, is becoming a major problem due to the progress of global warming and an aging population.

[0009] In this situation, technologies related to handrails have been proposed (see, for example, Patent Document 1). [Prior art documents] [Patent Documents]

[0010] [Patent Document 1] Japanese Patent Application Publication No. 9-241517 [Overview of the Initiative] [Problems that the invention aims to solve]

[0011] Patent Document 1 discloses a building material formed by melt-kneading 50 parts by weight of wood powder or other wood-based material with a specific thermoplastic resin, such as a polyphenylene ether resin or a resin composition consisting of a polyphenylene ether resin and a polystyrene resin.

[0012] Patent Document 1 discloses a technology based on wood materials to improve the heat resistance of building components, including handrails. Furthermore, resin is mixed in to enhance the heat resistance of this wood material.

[0013] However, conventional technologies such as those described in Patent Document 1 have limitations in suppressing the temperature rise of handrails in high temperatures or when exposed to strong sunlight. This is because even wood materials can become hot on the surface due to strong sunlight, and gripping them can cause problems due to the heat.

[0014] In addition, Patent Document 1 describes methods such as changing the material of the building component itself. However, when applying this building component to a handrail, there are problems such as the difficulty of manufacturing due to its shape and other factors, and the resulting increase in cost.

[0015] Moreover, changing the material itself presents a problem: it would increase the manufacturing process and costs of the handrails. Especially for handrails intended for general households, low prices are essential, so increasing manufacturing costs is not practical. Furthermore, even if the material is changed, the thermal conductivity of the material will still cause the temperature to rise in high-temperature environments and under sunlight conditions.

[0016] Furthermore, handrails, by their very nature, need to be touched by the user. Therefore, if they have issues such as a poor texture, users will lose their motivation to use them. As a result, if the handrails are not used, the purpose of ensuring safety cannot be achieved. This brings us back to the initial problem of handrails becoming unusable due to their temperature rising.

[0017] Furthermore, as mentioned above, it is conceivable to construct handrails solely from materials with low thermal conductivity, such as wood. However, since users rely on handrails to support their body and weight, sufficient strength and durability are necessary. In particular, handrails installed on the exterior of a residence must also be resistant to wind, rain, and sunlight. Considering these factors, even if the thermal conductivity is high, it is necessary to use metal or alloys as materials for the parts of the handrail that are required to achieve strength and durability.

[0018] From this perspective, suppressing temperature increases is important for handrails.

[0019] In other words, the conventional technology had the following problems. (Problem 1) The temperature rise of the handrail cannot be sufficiently suppressed. (Problem 2) The usability cannot be maintained. (Problem 3) Sufficient strength and durability cannot be achieved simultaneously.

[0020] As a result, the problem that the use of the handrail is hindered by the temperature rise has not been solved.

[0021] In addition, although the handrail itself is a member that has been used for a long time, the awareness of the problem of its heat has not been increasing, and the attention to the technical problem that the handrail becomes hot and causes harm to the user is low. Therefore, there are situations where many technological developments do not assume the problem of suppressing the temperature rise of the handrail.

[0022] In view of these problems, an object of the present invention is to provide a heat suppression handrail that can achieve both strength and the like while suppressing the temperature rise of the handrail due to a high-temperature environment or strong sunlight.

Means for Solving the Problems

[0023] The heat suppression handrail of the present invention includes a main body member of the handrail and, a heat radiation layer formed on the outer surface of at least the metal portion of the main body member, and a protective layer formed on the outer surface of the heat radiation layer. The heat radiation layer, includes a plurality of hollow ceramics and, a resin binder that connects the plurality of hollow ceramics to each other. The heat radiation layer converts heat from the outside into far-infrared rays and radiates it to the outside.

Effects of the Invention

[0024] The heat suppression handrail of the present invention can suppress the temperature rise by providing a heat radiation layer on the surface. The heat radiation layer converts the received heat into far-infrared rays and radiates it. As a result, the temperature rise of the handrail can be suppressed, and the harm caused by the heat when touching the handrail can be prevented.

[0025] Furthermore, the protective layer on the outside of the heat-radiating layer suppresses surface peeling and deterioration. As a result, durability can be improved. In addition, the protective layer improves the feel of the handrail. Consequently, users will no longer be discouraged from using the handrail. Of course, combined with the suppression of temperature rise, it becomes easier for users to use the handrail, improving the ease and safety of walking when using the handrail. [Brief explanation of the drawing]

[0026] [Figure 1] This is a photograph showing the installation state of the handrail in Embodiment 1 of the present invention. [Figure 2] These are a side view and a cross-sectional view of a part of the heat-suppressing handrail in Embodiment 1 of the present invention. [Figure 3] This is a schematic diagram showing thermal radiation by a thermal radiation layer in Embodiment 1 of the present invention. [Figure 4] This is a schematic diagram illustrating far-infrared conversion by hollow ceramics in Embodiment 1 of the present invention. [Figure 5] This is a test report demonstrating the far-infrared conversion and radiation by the thermal radiation layer of the present invention. [Figure 6] This is a test report demonstrating the far-infrared conversion and radiation by the thermal radiation layer of the present invention. [Figure 7] This is a perspective view showing an example of a heat-suppressing handrail in Embodiment 1 of the present invention. [Figure 8] This is a perspective view showing an example of a heat-suppressing handrail in Embodiment 1 of the present invention. [Figure 9] This is an explanatory diagram showing experimental results measuring the heat suppression effect of the heat radiation layer on handrails that are actually installed. [Figure 10] This diagram illustrates experimental results confirming that temperature rise is suppressed when the device is held by hand in Embodiment 2 of the present invention. [Figure 11] This diagram illustrates the measurement of the difference in surface temperature of a component after it has been grasped by hand, using the same components as in the experiment shown in Figure 10. [Modes for carrying out the invention]

[0027] The heat-suppressing handrail according to the first invention of the present invention comprises a handrail body member and A thermal radiation layer formed on the outer surface of at least the metal portion of the main body member, The thermal radiation layer comprises a protective layer formed on the outer surface of the thermal radiation layer, The aforementioned thermal radiation layer is Multiple hollow ceramics, The plurality of hollow ceramics are connected by a resin binder, The aforementioned thermal radiation layer converts heat from the outside into far-infrared radiation and radiates it to the outside.

[0028] This configuration suppresses the temperature rise of the handrail components due to external temperature increases and sunlight. By suppressing temperature increases, it is possible to prevent the dangers of touching the handrail during the summer. In addition, since people can touch the handrail with peace of mind, they can use the handrail to walk safely.

[0029] In the heat-suppressing handrail according to the second invention of the present invention, in addition to the first invention, the heat radiation layer converts heat from the outside into far-infrared rays and radiates them to the outside, thereby suppressing the temperature rise of the main body member and the outer surface.

[0030] This configuration allows for the suppression of handrail temperature rise not through heat conduction control, but through a mechanism that prevents the applied thermal energy from contributing to a temperature increase.

[0031] In the heat-suppressing handrail according to the third invention of the present invention, in addition to the first invention, the plurality of hollow ceramics include a plurality of hollow ceramics with different particle sizes.

[0032] This configuration enhances the ability to convert heat into far-infrared radiation.

[0033] In the heat-suppressing handrail according to the fourth invention of the present invention, in addition to the first invention, the hollow ceramic contains a metal oxide, The metal oxide includes at least one of aluminum oxide (Al2O3), magnesium oxide (MgO), ferric oxide (Fe2O3), sodium oxide (Na2O), potassium oxide (K2O), titanium oxide (TiO2), cerium oxide (CeO2), silicon dioxide (SiO2), and antimony trioxide (Sb2O3).

[0034] This configuration increases the efficiency of far-infrared conversion. Furthermore, it allows for the conversion of various types of heat with different wavelengths.

[0035] In the heat-suppressing handrail according to the fifth invention of the present invention, in addition to the first invention, the thickness of the heat-radiating layer is greater than the thickness of the protective layer.

[0036] This configuration allows the thermal radiation layer to function effectively while also serving as a protective layer.

[0037] In the heat-suppressing handrail according to the sixth invention of the present invention, in addition to the first invention, the protective layer is made of an organic solvent-based material.

[0038] This configuration enhances the tactile feel of the protective layer and allows for a more seamless manufacturing process.

[0039] In the heat-suppressing handrail according to the seventh invention of the present invention, in addition to the sixth invention, the protective layer has quick-drying properties.

[0040] This configuration ensures reliable formation of the protective layer. Furthermore, it enhances tactile feel and prevents adverse effects on the heat radiation layer during protective layer formation.

[0041] In the heat-suppressing handrail according to the eighth invention of the present invention, in addition to the sixth invention, the texture of the protective layer is better than the texture of the heat-radiating layer.

[0042] This configuration allows for both suppressing the temperature rise of the handrail and maintaining a pleasant tactile feel. As a result, pedestrians can be sure to use the handrail.

[0043] In the heat-suppressing handrail according to the ninth invention of the present invention, in addition to the first invention, the heat-radiating layer and the protective layer are formed on at least the portion of the main body member of the handrail that is gripped by the user.

[0044] This configuration allows for construction at minimal cost.

[0045] Embodiments of the present invention will be described below with reference to the drawings.

[0046] (Embodiment 1)

[0047] (Overview) Figure 1 is a photograph showing the installation of a handrail in Embodiment 1 of the present invention. The handrail in Figure 1 is installed, for example, at the entrance of a residence or facility. When there are stairs or an approach at the entrance, the handrail is installed to help ensure safer walking. Pedestrians hold onto this handrail when going up stairs or walking along the approach.

[0048] This handrail has metal parts in part or all of it. To reduce the weight of the handrail itself, it may be made of resin or other materials. However, handrails are used by pedestrians who lean their weight on them. Furthermore, depending on the length of the handrail and the length of the installation location, multiple pedestrians may use it simultaneously. In this case, a considerable load will be placed on the handrail.

[0049] To achieve the necessary strength and durability for this type of use, part or all of the handrail is made of metal (or an alloy). In Figure 1, the circled area represents this metal part. As shown in Figure 1, handrails are often installed outdoors. Due to the extreme heat of recent years, handrails exposed to strong sunlight and high outside temperatures cause the surface temperature of their metal parts 21 to rise.

[0050] If this heated metal part 21 is grasped, there is a risk of burns or other injuries.

[0051] The heat-suppressing handrail of the present invention suppresses the temperature rise centered on the metal part (and of course, the same applies to parts other than the metal part).

[0052] Figure 2 shows a side view and a cross-sectional view of a portion of the heat-suppressing handrail in Embodiment 1 of the present invention. It is schematically shown to illustrate the configuration of the heat-suppressing handrail 1.

[0053] The heat-suppressing handrail 1 incorporates the configuration of the present invention into a handrail as shown in Figure 1.

[0054] The heat-suppressing handrail 1 comprises a handrail body member 2 that constitutes the main body of the handrail, a heat radiation layer 3, and a protective layer 4. As described in Figure 1 and its description, the handrail body member 2 constitutes the outer shape and framework of the heat-suppressing handrail 1 and is provided with a metal portion 21 in part or in whole. The heat radiation layer 3 is formed on the outer surface of at least the metal portion 21 of the body member 2. The protective layer 4 is formed on the outer surface of this heat radiation layer.

[0055] In other words, as shown in Figure 2, the configuration consists of the handrail body member 2, the heat radiation layer 3, and the protective layer 4 in that order. Of course, the heat radiation layer 3 and protective layer 4 may also be provided in places other than the metal part 21. The parts to which the heat radiation layer 3 and other components are applied should be determined according to the structure of the heat-suppressing handrail 1, the number and characteristics of users, the installation location, etc.

[0056] The thermal radiation layer 3 converts heat from the outside into far-infrared radiation and radiates it outwards. The heat-suppressing handrail 1 is subjected to heat from the outside temperature, solar radiation, etc. The thermal radiation layer 3 converts this added heat into far-infrared radiation and radiates it outwards.

[0057] Converting the applied heat into far-infrared radiation suppresses the use of the applied heat to raise the temperature of the handrail body member 2. Normally, applied heat is conducted to the handrail body member 2, raising its internal and surface temperatures. However, the heat radiation layer 3 converts the applied heat into far-infrared radiation and radiates it. As a result, the amount of heat that conducts to the handrail body member 2 and raises its temperature is reduced. Consequently, the amount of heat conduction decreases, and the temperature rise of the handrail body member 2 is suppressed.

[0058] The thermal radiation layer 3 has multiple hollow ceramics and a resin binder connecting the multiple hollow ceramics. These hollow ceramics convert the applied heat into far-infrared radiation and radiate it to the outside.

[0059] Thus, the heat-suppressing handrail 1 can suppress temperature rise due to external heat by having a heat-radiating layer 3 on its outer surface.

[0060] The protective layer 4 is formed on the outer periphery of the heat radiation layer 3. As shown in Figure 2, the protective layer 4 is provided on the outside. The protective layer 4 prevents the heat radiation layer 3 from being exposed to the outside and protects it. As will be described later, the heat radiation layer 3 is composed of hollow ceramics and a resin binder. Therefore, it may be damaged if exposed to the outside and subjected to wind and rain or gripped by many pedestrians. Since the protective layer 4 covers the outer periphery of the heat radiation layer 3, it protects the heat radiation layer 3 and prevents damage to the heat radiation layer 3.

[0061] Furthermore, the heat radiation layer 3 contains hollow ceramics and other materials, which can lead to an unpleasant tactile feel. Since it is intended to be held by pedestrians, a pleasant tactile feel is particularly important. The protective layer 4 also enhances this tactile feel. As a result, pedestrians can grip it comfortably and use it as a walking aid without any discomfort.

[0062] In this way, the protective layer 4 can protect the heat radiation layer 3 while improving the tactile feel of the heat-suppressing handrail 1.

[0063] The heat-suppressing handrail 1 of the present invention, by comprising a heat-radiating layer 3 and a protective layer 4, can suppress the temperature rise of the heat-suppressing handrail 1 due to high temperatures and solar radiation. In addition, it is possible to improve the durability of the heat-radiating layer 3 and the tactile feel of the heat-suppressing handrail 1.

[0064] (Far-infrared conversion by thermal radiation layer) The details of far-infrared conversion by the thermal radiation layer 3 will now be explained. Figure 3 is a schematic diagram showing thermal radiation by the thermal radiation layer in Embodiment 1 of the present invention. In Figure 3, the protective layer 4 is omitted for the sake of clarity. The thermal radiation layer 3 is provided on the outer circumference of the handrail body member 2.

[0065] As described above, the thermal radiation layer 3 has multiple hollow ceramics 31 and a resin binder 32 connecting them. This configuration is shown in Figure 3.

[0066] As shown in Figure 3, when heat is applied from the outside, the heat is applied in the direction of arrow Y1. The hollow ceramic 31 converts the heat applied in the direction of arrow Y1 into far-infrared radiation and radiates it. Radiation occurs in the direction of arrow X1. As a result, when heat is applied to the handrail body member 2 due to external temperature or solar radiation, the heat is radiated to the outside, suppressing the temperature rise of the handrail body member 2.

[0067] Figure 4 is a schematic diagram illustrating far-infrared conversion by hollow ceramics in Embodiment 1 of the present invention. The hollow ceramic 31 has an internal space 310. The internal space 310 converts applied heat into far-infrared radiation by diffuse reflection within itself. When heat from sunlight or the like is applied to the heat radiation layer 3, that heat is diffusely reflected inside the internal space 310. Figure 4 illustrates this. In the process of diffuse reflection, the wavelength of the heat is changed and converted into far-infrared radiation. Furthermore, after becoming far-infrared radiation, it is radiated to the outside.

[0068] This continuous mechanism ensures that heat from sunlight and other sources is continuously converted into far-infrared radiation and radiated. This suppresses the temperature rise of the handrail body component 2.

[0069] Furthermore, it is preferable that the multiple hollow ceramics 31 in the thermal radiation layer 3 include hollow ceramics 31 with different particle sizes. The different particle sizes result in more diffuse reflection within the internal space 310 of each hollow ceramic 31. In addition, diffuse reflection between hollow ceramics 31 with different particle sizes is also added, resulting in a more effective conversion of heat into far-infrared radiation.

[0070] Furthermore, the hollow ceramic 31 also exhibits a mechanism that generates and radiates far-infrared rays through the conversion of heat on its surface. Including this function, the thermal radiation layer 3 can successively convert the applied heat into far-infrared rays and radiate them. As a result, the amount of heat (thermal energy) from the applied heat can be reduced, and the temperature rise of the handrail body member 2 can be suppressed.

[0071] Furthermore, the inclusion of hollow ceramics 31 of varying particle sizes increases the concentrated density of hollow ceramics 31 in the thermal radiation layer 3. This is because hollow ceramics 31 of medium or small particle sizes fill the gaps that form between hollow ceramics 31 of larger particle sizes.

[0072] As a result, the number density of hollow ceramics 31 contained in the thermal radiation layer 3 increases.

[0073] As the number density increases, the overall surface area of ​​the hollow ceramics 31 increases. This increase in the overall surface area leads to a greater amount of conversion to far-infrared radiation. This increase further enhances the ability to attenuate thermal energy by converting applied heat into far-infrared radiation.

[0074] Thus, the inclusion of hollow ceramics 31 with different particle sizes in the thermal radiation layer 3 contributes to improving the ability to convert heat into far-infrared radiation.

[0075] The hollow ceramic 31 may also preferably contain a metal oxide. By containing such a metal oxide, heat can be efficiently converted into far-infrared radiation. Here, the metal oxide includes at least one of aluminum oxide (Al2O3), magnesium oxide (MgO), ferric oxide (Fe2O3), sodium oxide (Na2O), potassium oxide (K2O), titanium oxide (TiO2), cerium oxide (CeO2), silicon dioxide (SiO2), and antimony trioxide (Sb2O3).

[0076] By containing these metal oxides, the hollow ceramic 31 can efficiently and reliably convert heat into far-infrared radiation. The metal oxides promote diffuse reflection in the internal space 310, and generate far-infrared radiation during the diffuse reflection process. In this way, the coating layer 3 containing the hollow ceramic 31 containing metal oxides can efficiently and reliably convert the applied heat into far-infrared radiation.

[0077] In this case, it is also preferable that the hollow ceramics 31 constituting the thermal radiation layer 3 contain at least two types of metal oxides, such as aluminum oxide (Al2O3), magnesium oxide (MgO), ferric oxide (Fe2O3), sodium oxide (Na2O), potassium oxide (K2O), titanium oxide (TiO2), cerium oxide (CeO2), silicon dioxide (SiO2), and antimony trioxide (Sb2O3).

[0078] By including hollow ceramics 31 made of two or more different types of metal oxides in the thermal radiation layer 3, each hollow ceramic 31 can convert different components of the applied heat (such as wavelength and temperature components) into far-infrared rays. One hollow ceramic 31 made of one metal oxide converts the heat of one component into far-infrared rays, and another hollow ceramic 31 made of a different type of metal oxide converts the heat of another component into far-infrared rays.

[0079] In this way, the hollow ceramics 31 made of multiple types of metal oxides constitute the heat radiation layer 3, allowing the applied heat to be converted evenly and reliably into far-infrared radiation. In other words, the attenuation of heat (thermal energy) can be performed more efficiently. As a result, the temperature rise of the handrail body member 2 can be reliably suppressed.

[0080] The resin binder 32 connects the hollow ceramics 31 together. By connecting them, the heat radiation layer 3 can be formed as a single layer. In this way, the heat radiation layer 3 is formed on the outer circumference of the handrail body member 2.

[0081] (Confirmation experiment of far-infrared radiation) Furthermore, the inventor conducted a confirmation experiment at a public research institution (Shimane Prefectural Industrial Technology Center) to verify that the thermal radiation layer 3 emits far-infrared rays when heat is applied. A test report was received for this experiment, which is shown in Figures 5 and 6. Figures 5 and 6 are test reports showing the far-infrared conversion and radiation by the thermal radiation layer of the present invention.

[0082] In Figures 5 and 6, the label "Gaina" indicates an example of the thermal radiation layer 3.

[0083] Measuring equipment: JEOL Ltd. JTR-WINSPEC100 main unit and IR-IRR200 infrared measuring unit

[0084] Measurement method: The emissivity of far-infrared radiation was measured using measuring equipment.

[0085] Based on these measurements, the state of far-infrared radiation when heat is applied by the thermal radiation layer was confirmed. It was confirmed that the integrated emissivity in the wavelength range of 5.0 μm to 22.5 μm, which is included in the far-infrared wavelength range (generally 3 μm to 1000 μm), is very high at 94.6%. This is comparable to materials known to have far-infrared conversion capabilities, such as tourmaline. Thus, the ability and efficiency of heat conversion by thermal radiation layer 3 to far-infrared radiation were also confirmed in the test reports from public research institutions.

[0086] As described above, the heat radiation layer 3 converts heat applied by sunlight and other sources into far-infrared radiation and radiates it. This suppresses the temperature rise of the handrail body member 2. When the temperature rise is suppressed, the surface temperature of the handrail body member 2 (and the heat radiation layer 3 and protective layer 4 covering it) does not rise, and no problems occur when pedestrians grip it. As a result, pedestrians will no longer have to touch a hot handrail, and they will be able to walk safely using the handrail.

[0087] (protective layer) As previously described, the protective layer 4 protects the heat radiation layer 3 and enhances its tactile properties. The protective layer 4 is provided on the outer periphery of the heat radiation layer 3 to fulfill these roles.

[0088] The protective layer 4 is preferably made of an organic solvent-based material. Being made of an organic solvent-based material results in a better feel (texture) of the protective layer 4 compared to the radiation layer 3. As a result, discomfort is eliminated when pedestrians grip the device to assist them while walking.

[0089] In particular, as mentioned above, if only the thermal radiation layer 3 is present on the surface, it may result in an unpleasant texture. However, the presence of the protective layer 4 eliminates this problem.

[0090] Furthermore, it is preferable that the protective layer 4 is made of a material with quick-drying properties. The aforementioned organic solvent-based material is preferable because it possesses quick-drying properties. The protective layer 4 is applied to the outer periphery of the heat radiation layer 3 as a solvent and then dried. For this reason, high quick-drying properties are preferable. High quick-drying properties allow the protective layer 4 to adhere more easily to the heat radiation layer 3, thereby improving durability and other properties.

[0091] Furthermore, the protective layer improves the feel and enhances the strength (including the protective strength of the heat radiation layer 3 and the overall strength of the handrail). In particular, it provides sufficient strength to suppress surface deterioration and damage even when repeatedly gripped by people.

[0092] Furthermore, it is preferable that the thickness of the heat radiation layer 3 be greater than the thickness of the protective layer 4. As previously described, the heat radiation layer 3 converts the applied heat into far-infrared radiation and radiates it. This suppresses the temperature rise of the handrail body member 2. The protective layer 4 protects the heat radiation layer 3 while enhancing the tactile feel. Based on this division of roles, it is preferable that the thickness of the heat radiation layer 3 be greater than the thickness of the protective layer 4.

[0093] This is because the protective layer 4 is less likely to interfere with the far-infrared conversion and radiation functions of the thermal radiation layer 3. Furthermore, since the protective layer 4 serves to protect the thermal radiation layer 3 and improve its tactile feel, it does not need to be very thick. On the other hand, the thermal radiation layer 3 is required to perform its function sufficiently. From this viewpoint as well, it is preferable that the thickness of the thermal radiation layer 3 is greater than the thickness of the protective layer 4.

[0094] As described above, the protective layer 4 provides protection for the heat radiation layer 3 and improves its tactile feel without interfering with the function of the heat radiation layer 3.

[0095] Thus, the heat-suppressing handrail 1 of the present invention suppresses temperature rise while also providing an appropriate tactile feel, allowing pedestrians to grasp it without hesitation and use it as assistance while walking. This is true even in the extremely hot summer months. Even in high-temperature environments during the summer, safe walking becomes possible by using the handrail as assistance.

[0096] Furthermore, the heat radiation layer 3 and the protective layer 4 may be formed on the portion of the handrail body member 2 that is gripped by the user. For example, they may be formed only on the top surface and side surfaces of the handrail body member 2.

[0097] (Heat-suppressing handrail) Figures 7 and 8 are perspective views showing an example of a heat-suppressing handrail in Embodiment 1 of the present invention. An example of a heat-suppressing handrail 1 comprising the heat radiation layer 3 and protective layer 4 described above is shown.

[0098] Figure 7 shows a pair of heat-suppressing handrails 1 that are gripped with both hands to assist walking. Figure 8 shows a heat-suppressing handrail 1 that is provided on only one side. Different forms of heat-suppressing handrails 1 are used depending on the location of use, installation location, or manner of use.

[0099] As explained, the heat-suppressing handrail 1 is equipped with a heat-radiating layer 3 and a protective layer 4. These components suppress temperature rise while also improving durability and tactile feel. Pedestrians can use the heat-suppressing handrail 1 safely without experiencing discomfort from heat when gripping it. Furthermore, the heat-suppressing handrail of the present invention does not control thermal conductivity by the type of material, as in conventional technology, but rather radiates the applied heat, preventing heat from being transferred to the handrail body. This suppresses temperature rise. In other words, the approach to solving the problem is completely different from controlling it by the type of material. This has the advantage of being applicable to existing handrails and reducing manufacturing costs.

[0100] (Embodiment 2)

[0101] Next, Embodiment 2 will be described.

[0102] Figure 9 is an explanatory diagram showing experimental results measuring the heat suppression effect of the heat radiation layer on a handrail that is actually installed. There is a pair of handrails, one of which has the heat radiation layer 3 applied, and the other which does not.

[0103] Since this handrail is installed outdoors, it is exposed to environments with high temperatures and sunlight. Under these conditions, the surface temperature of a handrail with and without the heat radiation layer 3 was measured during the time of day when the outside temperature was high.

[0104] Measurement results showed that the surface temperature of the handrail without the thermal radiation layer 3 was 42°C, while the surface temperature of the handrail with the thermal radiation layer 3 was 35°C. In other words, the presence of the thermal radiation layer 3 suppresses the rise in the surface temperature of the handrail by 7°C. This level of suppression also reduces problems when gripping the handrail.

[0105] In fact, when we gathered feedback from pedestrians who actually use the areas where the handrails were installed, we received many comments such as, "Before, they were sometimes too hot to hold, but with these handrails, it's safe to grab them."

[0106] Thus, the effectiveness of the present invention was confirmed through actual installation experiments.

[0107] (Experiment 2: Confirmation that the temperature rise is suppressed when held by hand)

[0108] Figure 10 is an explanatory diagram of experimental results confirming that the temperature rise is suppressed when the hand grips the hand in Embodiment 2 of the present invention. A bracket corresponding to the handrail body was used. Here, comparative experiments were conducted using three types of brackets, as shown from the top of Figure 10: bracket only, bracket with a thermal radiation layer (labeled GAINA in Figure 10 is the thermal radiation layer), and bracket with both a thermal radiation layer (as mentioned above, GAINA is the thermal radiation layer) and a protective layer.

[0109] The surfaces of three different materials were heated to 60°C to raise their temperature. In this state, a person grasped the surface of each material, and the surface temperature of their hand was measured after releasing their grip. Experiment 1 confirmed that the temperature rise of the handrail was suppressed, but this experiment aimed to confirm that the effect of suppressing the temperature rise would also be present when a user actually grasped the material.

[0110] As shown on the right side of Figure 10, the surface temperature of the hand was measured after gripping each component. Since this is surface temperature, the areas with stronger red coloration indicate higher temperatures. As can be seen from the results on the right side of Figure 10, the surface temperature of the hand is high after gripping a component without a thermal radiation layer. In contrast, the surface temperature of the hand is lower after gripping a component with a thermal radiation layer (GAINA) and a component with both a thermal radiation layer and a protective layer.

[0111] Specifically, the surface temperature of the hand after gripping a component without the top heat radiation layer (standard product) was 43.4°C, the surface temperature after gripping a component with only the heat radiation layer was 41.3°C, and the surface temperature after gripping a component with both the heat radiation layer and the protective layer was 40.0°C. From these results, it can be seen that the presence of the heat radiation layer reduces the situation in which the user feels heat when gripping the component.

[0112] Furthermore, the presence of a protective layer in addition to the heat radiating layer reduces the amount of heat transferred from the heated component to the hand, further reducing the feeling of heat when gripping.

[0113] Figure 11 is an explanatory diagram showing the difference in surface temperature of a component after it has been grasped by hand, using the same components as in the experiment in Figure 10. Conversely to Figure 10, it shows the results of measuring the surface temperature of a component after it has been grasped after being heated to 60°C.

[0114] For standard products without a thermal radiation layer (GAINA), the surface temperature after being held in the hand is 60°C. In contrast, for components with a thermal radiation layer (GAINA) and a protective layer, the surface temperature after being held in the hand is 48.5°C. In other words, the surface temperature of the component is closer to the surface temperature of the hand. The temperature difference is reduced. A smaller temperature difference between the surface temperature of the component and the surface temperature of the hand means that (while holding the component in your hand) you will feel less heat.

[0115] Thus, the handrail of the present invention, which has a heat radiation layer and a protective layer applied to the surface of the component, suppresses the rise in surface temperature and also reduces the temperature difference between the hand and the handrail, making it less likely for the hand to feel the heat when gripping it. This prevents situations where it is difficult to grip the handrail even in high-temperature environments.

[0116] The above explains how the temperature rise of the handrail due to ambient temperature and solar radiation can be suppressed. However, even during periods of low ambient temperature, such as winter, the thermal radiation layer 3 converts external heat into far-infrared radiation and radiates it. This also suppresses the temperature drop of the handrail. In other words, it can alleviate the feeling of coldness when gripping the handrail in winter.

[0117] Furthermore, since the heat radiation layer 3 converts and radiates far-infrared rays, it does not accumulate heat on the surface of the handrail main body component 2, such as the protective layer 4. Therefore, instead of converging to the ambient temperature, when touched by hand, the heat approaches the surface temperature of the hand. As a result, it is less likely to feel cold. This is similar to how it is less likely to feel hot.

[0118] As a result, the heat-suppressing handrail 1 of the present invention can reduce discomfort and danger to the user when gripping it, whether it is hot or cold.

[0119] The heat-suppressing handrails described in Embodiments 1 and 2 above are examples illustrating the spirit of the present invention, and may include modifications and alterations that do not depart from the spirit of the present invention. [Explanation of Symbols]

[0120] 1. Heat-resistant handrail 2. Handrail main body component 3. Thermal radiation layer 31 Hollow Ceramics 32 Resin Binder 310 Interior space 4 protective layer

Claims

1. The main body component of the handrail, A thermal radiation layer formed on the outer surface of at least the metal portion of the main body member, The thermal radiation layer comprises a protective layer formed on the outer surface of the thermal radiation layer, The aforementioned thermal radiation layer is Multiple hollow ceramics, The plurality of hollow ceramics are connected by a resin binder, The aforementioned heat radiation layer is a heat-suppressing handrail that converts heat from the outside into far-infrared radiation and radiates it to the outside.

2. The heat-suppressing handrail according to claim 1, wherein the heat radiation layer converts heat from the outside into far-infrared rays and radiates them to the outside, thereby suppressing the temperature rise of the main body member and the outer surface.

3. The heat-suppressing handrail according to claim 1, wherein the plurality of hollow ceramics comprises a plurality of hollow ceramics with different particle sizes.

4. The hollow ceramics mentioned above contain a metal oxide, The metal oxide is aluminum oxide (Al ２ O ３ ), magnesium oxide (MgO), ferric oxide (Fe ２ O ３ ), sodium oxide (Na ２ O), potassium oxide (K ２ O), titanium oxide (TiO ２ ), cerium oxide (CeO ２ ), silicon dioxide (SiO ２ ), antimony trioxide (Sb ２ O ３ ), and the heat suppression handrail according to claim 1 contains at least one of them.

5. The heat-suppressing handrail according to claim 1, wherein the thickness of the heat-radiating layer is greater than the thickness of the protective layer.

6. The heat-suppressing handrail according to claim 1, wherein the protective layer is made of an organic solvent-based material.

7. The heat-suppressing handrail according to claim 6, wherein the protective layer has quick-drying properties.

8. The heat-suppressing handrail according to claim 6, wherein the texture of the protective layer is better than the texture of the heat-radiating layer.

9. The heat-suppressing handrail according to claim 1, wherein the heat-radiating layer and the protective layer are formed on at least the portion of the handrail body member that is gripped by the user.

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