JP3998029B2 - footwear - Google Patents

Description

  The present invention relates to the improvement of heat insulation and heat retention of footwear.

  2. Description of the Related Art Conventionally, there is a shoe heat insulating material with improved heat retention, which is made of a synthetic sponge or the like to keep the heat insulating property (see, for example, Patent Document 1).

  FIG. 12 is a cross-sectional view of a conventional ultra low temperature refrigerator boots. In FIG. 12, the shoe body 1 is composed of an outer 3 made of a woven fabric made of rubber and rubber on the outside of the felt 2. It is attached. The interior body 6 that can be drawn out is composed of a heat insulating material 7 made of synthetic sponge or the like, and an insole 8. With this configuration, sufficient heat retention is obtained, and the interior body can be pulled out and dried.

  Moreover, there exists what laminated | stacked the far-infrared radiator and the honeycomb material as a shoe insole which warms a foot (for example, refer to patent documents 2).

FIG. 13 is a cross-sectional view of a conventional insole for shoes. In FIG. 13, a shoe insole 9 is formed in the shape of a shoe sole, centering on a carbon fiber cloth 10 that emits far-infrared rays, a protective material 11 made of chemical fibers on the upper side, and a honeycomb material on the shoe sole side with a heat insulating material 12. And a reflection structure 13 is provided between the carbon fiber cloth 10 and the heat insulating material 12. Thereby, the heating effect in shoes is achieved.
JP 7-100003 A Registered Utility Model No. 3024325

  However, in the conventional configuration described above, a synthetic sponge or a honeycomb material is used as a heat insulating material in shoes or insoles of shoes, but the thermal conductivity of the synthetic sponge is generally 0.03 W / m · K to 0.05 W / m.・ The thermal conductivity of K and honeycomb materials is about 0.1 W / m · K, and the thermal insulation performance is low when used in winter sports such as skiing and snowboarding, and in cold regions, and the body heat generated by the human body is kept warm. It was insufficient to prevent the cold caused by.

  As an insole for shoes, the heating effect is not always necessary, and it may be too hot depending on the climate. Moreover, the thickness was large by lamination, and the cramped feeling was not avoided.

  An object of the present invention is to provide footwear and an insole for shoes that can further improve the heat insulation and can further reduce the cold by keeping the body temperature as much as possible. It is another object of the present invention to provide footwear and an insole that can add a heating effect as required.

  In order to solve the above-described conventional problems, the footwear and the insole of the present invention apply a vacuum heat insulating material as a heat insulating material.

  Due to the excellent heat insulation performance (thermal conductivity: 0.002 W / m · K to 0.006 W / m · K) of the vacuum heat insulating material, the insole of shoes and shoes is dramatically improved with a thin heat insulating material. Has an effect.

  In addition, in order to conform to the shape of footwear, the vacuum heat insulating material can be formed by using multiple core materials or a combination of multiple materials, and the shape of the outer jacket material at the periphery of the core material can be reduced. The effective heat insulation area was expanded.

  The footwear and insoles of the present invention have significantly improved heat insulation, effectively keeps body heat and shuts off cool air, and can keep the feet comfortable even in winter sports and cold areas. it can. In addition, by using a thin heat insulating material, the margin of design as footwear can be improved, the entire footwear can be downsized to improve portability, and the insole can be prevented from being cramped due to thickness. .

  In the first aspect of the present invention, the core material is covered with a jacket material including a laminate film having a heat-welded layer, a gas barrier layer, and a protective layer from the inside, and a felt laminated and fixed on the surface of the laminate film. The vacuum heat insulating material obtained by reducing the pressure inside is applied to at least the bottom, upper, front, rear, or side. The vacuum insulation material has excellent heat insulation performance, so it effectively keeps the body heat generated by the human body and blocks the outside air, and keeps the feet comfortable even during winter sports such as skiing and snowboarding and in cold areas. In addition, the outer dimensions of the footwear can be reduced to improve the behavior, and the space efficiency during transportation can be improved to improve the portability.

  The invention according to claim 2 is the invention according to claim 1, wherein the vacuum heat insulating material has a plurality of core members, and a jacket member between the plurality of core members is thermally welded. It is possible to form a vacuum heat insulating material having a three-dimensional structure by bending between them, and it becomes easy to apply the vacuum heat insulating material to footwear.

  The invention according to claim 3 is the invention according to claim 2, in which a plurality of two or more types of vacuum heat insulating materials are applied. By using a vacuum heat insulating material having an appropriate shape according to the part of the shoe, it can be applied over a wide range of footwear.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the footwear is a boot which covers the vicinity of the calf from the ankle. By wrapping, the area where the body heat is effectively insulated and the outside air is effectively blocked in the foot, and the foot can be more comfortably maintained than the boots in a cold environment.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the outer shell or the sole of the footwear is made of a plastic resin, and deformation of the footwear even during use. Therefore, it is possible to maintain the heat insulation performance over a long period of time because the applied vacuum heat insulating material is not subjected to a load such as repeated bending.

  The invention according to claim 6 is the footwear in which the heat generating member is provided inside the vacuum heat insulating material in the invention according to any one of claims 1 to 5. Since the vacuum heat insulating material has excellent heat insulating performance, heat generated by the heat generating member can be effectively transmitted to the inside without escaping to the outside, and the foot can be kept comfortable even in an extremely cold environment.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the vacuum heat insulating material has a plurality of through holes, and the insole of the shoe insole is improved. , Can prevent the feet from peeling.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same configurations as those of the conventional example or the embodiments described above, and detailed descriptions thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a side view of a shoe in Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view of the shoe in Embodiment 1 of the present invention. 3 to 5 are external views of the vacuum heat insulating material applied to the shoe in Embodiment 1 of the present invention.

  1 and 2, a shoe 14 as a representative example of footwear is configured by adhering a shoe sole 5 to a bottom portion 15, an upper portion 16, a front surface portion 17, a rear surface portion 18, and a side surface portion 19 that wraps a foot. Has been. The bottom portion 10 is provided with a vacuum heat insulating material 20 that covers almost the entire surface in accordance with the shape of the bottom portion 10, and has a heat generating member 21 on the toe side of the upper layer, an insole 4 on the heel side, and an insole 8 on the top. Are arranged and laminated. The upper part 16 is formed by stacking the vacuum heat insulating material 22 and the felt 2 so as to cover from the outside to the outer upper 3 and the toes, and the front part 17 continuous on the upper side is composed of the outer upper 3 and the felt. 2 continues from the upper part 16 as it is, and the middle layer heat insulating material 23 is assumed to have more flexibility in place of the synthetic sponge. From the rear surface portion 18 to the side surface portion 19, a vacuum heat insulating material 24 formed so as to cover the whole is disposed in the middle layer, and a synthetic sponge heat insulating material 23 is disposed in the gap between the vacuum heat insulating material 22 and the vacuum heat insulating material 24. Are stacked.

  3 to 5, the vacuum heat insulating materials 20, 22, and 24 are obtained by disposing the core materials 26a, 26b, and 26c inside the outer covering material 25 having gas barrier properties, respectively, and sealing the interior by reducing the pressure. Generally, a vacuum heat insulating material can exhibit excellent heat insulating performance by setting the internal vacuum degree to 1 Pa to 100 Pa. The outer covering material 25 is a laminated film in which a plurality of films are laminated. A protective layer is provided on the outer side, an aluminum foil or the like is used as a gas barrier layer on the middle, and a heat welding layer is provided on the inner side. Any of the core materials used was compression-molded with a powder containing silica powder as a main component so as to have a thickness of 1.5 mm. However, a fiber-based core material mainly containing glass wool may be used.

  In the production of the vacuum heat insulating materials 20, 22, and 24, the outer cover material 25 is thermally welded by pressing a flexible heater on the entire surface including the core material 26 in a reduced pressure space. Heat welding was performed without leaving a jacket material 25 between the core material. Thereafter, the heat welding part 27 was cut along the periphery of the core member 26 so as to be disposed in each part of the shoe.

  In this way, by thermally welding the entire periphery of the core material 26, the width of the heat welded portion 27 can be narrowed to increase the effective heat insulation area. Moreover, a notch, a notch, etc. can also be formed and it can produce in arbitrary shapes.

  In order to thermally weld all the outer covering material 25 around the core material 26, it is necessary to suppress the generation of wrinkles of the outer covering material 25. For this purpose, the thickness of the core material 26 is desirably 5 mm or less.

  Thus, if the vacuum heat insulating materials 20, 22, and 24 have appropriate shapes according to the parts of the shoes, the vacuum heat insulating material can be applied. Further, by constructing the vacuum heat insulating materials 20, 22, and 24 from a plurality of core materials 26, it becomes easy to bend or round and form a three-dimensional vacuum heat insulating material. Easy to apply.

  In addition, it is preferable that the heat generating member 21 be removable, so that the heat generating member 21 can be removed depending on the exchange or the climate, and a sheet heat heater, a known disposable warmer, or the like can be used.

  With the configuration as described above, the shoe 14 according to the first embodiment effectively keeps the body heat generated by the human body and blocks the outside air by the excellent heat insulating action of the vacuum heat insulating materials 20, 22, and 24. The foot can be kept comfortable in a cold environment.

  Further, by providing the heat generating member 21 on the inner side of the vacuum heat insulating material 20, the heat insulating performance of the vacuum heat insulating material 20 can effectively transmit the heat generated by the heat generating member 21 to the inner side without letting it escape to the outer side. . Furthermore, the heat generation time can be extended by reducing the energy consumption of the heat generating member 21.

(Embodiment 2)
FIG. 6 is a side view of a shoe according to Embodiment 2 of the present invention, and FIG. 7 is a cross-sectional view of the shoe according to Embodiment 2 of the present invention. The shoes 28 are boots, and are generally used as work shoes in a large refrigerator or winter shoes in a cold region.

  In FIG. 6, the shoe 28 is similar to the shoe 14 shown in the first embodiment from the vicinity of the ankle, and in addition to this, a torso 29 covering the calf is added, and the bottom 30, the upper 31, The front part 32, the rear part 33, the side part 34, and the shoe sole 5 are comprised. In FIG. 7, a shoe 28 is provided with a vacuum heat insulating material 31 at a body portion 29, a vacuum heat insulating material 20 at a bottom portion 30, a vacuum heat insulating material 22 at an upper portion 31, and a vacuum heat insulating material from a rear surface portion 33 to a side surface portion 34. 24 is arranged.

  With the configuration as described above, the shoe 28 has the heat insulating property greatly improved by applying the vacuum heat insulating material 31 up to the torso 29 covering the calf, and can keep the foot more comfortable than the short shoe in a cold environment. Of course, it is possible to reduce the overall size of the shoe with a thin wall thickness.

  Although not shown in the drawing, if the bottom 5 is formed with a fixing part to the binding, or if the entire outer shell is made of plastic resin and the foot can be fastened with a buckle, It can be used as ski boots.

  In the second embodiment, in particular, if the outer shell of the shoe 28 is made of a hard material such as plastic resin, the shoe 28 is hardly deformed even during use, and is repeatedly applied to the vacuum heat insulating materials 20, 22, 24, 31. The load such as bending is not so much applied, and the heat insulation performance can be maintained for a long time. Furthermore, by reducing the size of the entire shoe, it is possible to improve the portability as a load when moving to a distance such as skiing.

(Embodiment 3)
8 is an external view of a shoe insole according to Embodiment 3 of the present invention, FIG. 9 is a sectional view of a shoe insole according to Embodiment 3 of the present invention, and FIG. 10 is a shoe according to Embodiment 3 of the present invention. The top view of the vacuum heat insulating material applied to the insole, FIG. 11 is sectional drawing of the shoes which arrange | positioned the insole of the shoes in Embodiment 3 of this invention.

  8 and 9, a shoe insole 35 is formed by stacking felt 37 on both surfaces of a vacuum heat insulating material 36. In FIG. 10, the vacuum heat insulating material 36 is composed of a gas barrier outer covering material and a core material like the vacuum heat insulating material 20 shown in FIG. 3, but the vacuum heat insulating material 36 is provided with a plurality of through holes 38. . The core material is obtained by laminating sheets made of glass fibers to a thickness of 1 mm, and the thickness of the insole 35 of the shoe is about 2 mm. It is desirable that the number of through-holes 38 be the minimum number that can achieve both the heat insulating performance and hygiene of the vacuum heat insulating material 36. The vacuum heat insulating material 36 may be composed of a plurality of core materials.

  With the configuration as described above, the insole 35 of the shoe has a high heat insulating performance even if it is thin due to the excellent heat insulating performance of the vacuum heat insulating material 36, and suppresses cramped feeling even when disposed on the bottom of a normal shoe. Can be. In addition, a plurality of through holes 38 provided in the vacuum heat insulating material 36 can provide a sanitary insole that secures air permeability and prevents the feet from being peeled off.

  In FIG. 11, a shoe 39 is a normal short shoe, and a shoe insole 36 is disposed on the bottom surface of the shoe 39. Thereby, even a normal shoe can prevent the bottom from being cold, and can keep the foot comfortable in a cold environment.

  As described above, footwear and insoles according to the present invention are effective in keeping body heat and blocking cold air by applying a vacuum heat insulating material having excellent heat insulating performance, and the vacuum heat insulating material is thin. Even if formed, since the heat insulating effect is high, it can be applied not only to the shoes shown in the embodiment of the present invention but also to footwear that does not have normal heat insulating properties such as slippers, thereby ensuring cold protection and comfortable. Can be improved.

Side view of the shoe in Embodiment 1 of the present invention Sectional drawing of the shoes in Embodiment 1 of this invention External view of the vacuum heat insulating material applied to shoes in Embodiment 1 of the present invention External view of the vacuum heat insulating material applied to shoes in Embodiment 1 of the present invention External view of the vacuum heat insulating material applied to shoes in Embodiment 1 of the present invention Side view of the shoe in Embodiment 2 of the present invention Sectional drawing of the shoes in Embodiment 2 of this invention External view of insole of shoe in Embodiment 3 of this invention Sectional drawing of the insole of shoes in Embodiment 3 of this invention The top view of the vacuum heat insulating material applied to the insole of shoes in Embodiment 3 of this invention Sectional drawing of the shoes which arranged the insole of shoes in Embodiment 3 of this invention Cross-sectional view of conventional ultra-low temperature refrigerator boots Sectional view of conventional insole

Explanation of symbols

2, 37 Felt 3 Outer shell 14, 28, 39 Shoes 15 Bottom 16 Back 17 Front 17 Front 19 Rear 20 20, 22, 24, 31, 36 Vacuum insulation 21 Heating material 25 Outer coating 26, 26a, 26b, 26c Core material 29 Body 38 Through-hole

Claims (7)

  It was obtained by covering the core material with a jacket material comprising a laminate film having a heat-welded layer, a gas barrier layer, and a protective layer from the inside and a felt laminated and fixed on the surface of the laminate film, and reducing the pressure inside. Footwear characterized by applying a vacuum heat insulating material to at least the bottom, upper, front, rear, or side.   The footwear according to claim 1, wherein the vacuum heat insulating material has a plurality of core materials, and a jacket material between the plurality of core materials is heat-welded.   The footwear according to claim 2, wherein a plurality of two or more types of vacuum heat insulating materials are applied.   The footwear according to any one of claims 1 to 3, wherein the boot has a torso that covers the vicinity of the calf from an ankle.   The footwear according to any one of claims 1 to 4, wherein the outer shell or the shoe sole is made of a plastic resin.   The footwear according to any one of claims 1 to 5, wherein a heat generating member is provided inside the vacuum heat insulating material.   The footwear according to any one of claims 1 to 6, wherein the vacuum heat insulating material has a plurality of through holes.

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