JP4862380B2 - Thermal insulation shutter - Google Patents

Description

  The present invention relates to a heat insulating shutter that has an opening / closing function in a window of a building such as a house, has lighting function and ventilation function when opened, and exhibits a heat insulating effect in addition to light shielding when closed.

  The windows of buildings such as houses need lighting and ventilation functions, but they are required to have various functions such as light shielding and heat insulation, as well as soundproofing and crime prevention. However, there is no member that satisfies all of these functions. For example, a glass sash with a heat insulating effect, a blind with a light shielding effect, and a method of providing a sash that can be opened and closed on the outer side of the glass sash, Some are provided (see, for example, Patent Document 1).

  In particular, with regard to the shutter, although functions such as light shielding and crime prevention are provided, a shutter with a heat insulating function has also been proposed, but the effect is hardly expected (see, for example, Patent Document 2). ).

  FIG. 10 shows a conventional multi-function sash described in Patent Document 1. In FIG.

  As shown in FIG. 10, the multifunction sash 1 includes a glass shoji 2 provided on the indoor side, a blind 3 provided on the outdoor side of the glass shoji 2, and an outdoor shoji 4 provided on the outdoor side thereof. Consists of

  The operation of the multi-function sash 1 configured as described above will be described below.

  By opening all the glass shoji 2, the blind 3, and the outdoor shoji 4, the lighting and ventilation effect can be obtained. On the other hand, by closing all the glass shoji 2, the blind 3, and the outdoor shoji 4, it is possible to obtain a light shielding effect and a heat insulating effect.

  When the amount of solar radiation is large, especially in summer, the outdoor shoji 4 is opened with the glass shoji 2 and the blind 3 closed, so that the space between the glass shoji 2 and the outdoor shoji 4 is Since the hot air can be released outdoors, the heat insulation performance can be further increased. Moreover, since the blind 3 is inside the outdoor shoji 4, it is not exposed to strong winds.

  FIG. 11 shows a conventional heat insulating shutter described in Patent Document 2. In FIG.

  As shown in FIG. 11, the heat insulating shutter 5 includes a plurality of slats 7 made of a metal plate joined with a wood material or a wood composite material installed outside the window frame 6, a holding member 8 that holds the slat 7, and a holding member The member 8 is constituted by a winding device 9 or the like.

  About the heat insulation shutter 5 comprised as mentioned above, the effect | action is demonstrated below.

In order to obtain a light shielding effect or a heat insulating effect, the holding member 8 made of a cord or the like wound around the winding device 9 is rewound to move the slat 7 downward, and the slat 7 is closed by dropping or rotating (tilting). To do. On the other hand, in order to obtain daylighting and ventilation effects, the slat 7 is tilted and its angle is adjusted, or the holding member 8 is wound up by the winding device 9, and the slat 7 is moved upward and stored.
JP 2001-214670 A JP 2002-194967 A

  However, in the configuration of Patent Document 1, the outdoor shoji 4 has almost no heat insulating effect, and a heat insulating effect is obtained by air heat insulation of the space formed between the glass shoji 2 and the outdoor shoji 4. Therefore, when the outdoor shoji 4 is opened, the heat insulating effect is drastically reduced, and the light shielding effect of the blind 3 and the slight heat insulating effect of the glass shoji 2 can be expected.

  This heat insulation effect is different from the heat insulation effect of wall insulation using a heat insulating material such as urethane foam, and the heat insulation performance is inferior, so heat from the opening is said to account for 40% or more of heat intrusion into the house. The effect of suppressing intrusion is extremely low. Even when pair glass is used as the glass shoji 2, this tendency does not change so much.

  In addition, it is considered that a heat insulating effect can be obtained to some extent when the glass shoji 2 and the blind 3 including the outdoor shoji 4 are closed, but a number of opening / closing operations are forced depending on various situations. It is thought that it is inconvenient.

  On the other hand, in the configuration of Patent Document 2, application of a wood material or a wood composite material as a heat insulating material constituting the slat 7 has been proposed, but the heat insulating performance is poor, and the configuration is not mentioned at all. It is hard to say that this is a realistic method.

  The present invention solves the above-described conventional problems, and provides a heat insulating shutter that exhibits a very high heat insulating effect in a small space.

  In order to achieve the above object, a heat insulating shutter according to the present invention includes a face material, a frame material having heat insulation provided at an end portion of the face material, and a vacuum heat insulating material disposed on the indoor side of the face material. The shutter is provided on a building window, and the vacuum heat insulating material provided on each slat is supported by the frame material.

  As a result, heat intrusion from the surface of the face material is blocked by the vacuum heat insulating material, and heat intrusion from the edge of the face material can be suppressed by the frame material and the vacuum heat insulating material, so that it is located at the outermost side of the opening. A heat insulating effect is exhibited just inside the face material of the shutter, and the space between the glass shoji can be maintained close to the temperature of the indoor space.

  Here, the vacuum heat insulating material has a heat insulating performance that is 4 to 5 times higher than that of a general heat insulating material such as urethane foam, so it exhibits a high heat insulating effect in a space saving of only a few millimeters. I can do it.

  Since the heat-insulating shutter of the present invention can greatly reduce the heat entering the room from the window of a building such as a house, it can save energy for cooling and heating.

  In addition, since the space between the heat insulating shutter and the glass shoji is close to the room temperature, intrusion of radiant heat near the opening is suppressed in summer, and cold radiation and cold draft are suppressed in winter. There is an effect that the indoor comfortable space can be further expanded to the opening side.

  In addition, it has the effect of suppressing dew condensation that occurs inside the glass shoji in winter, and also has the effect of suppressing the occurrence of mold.

  Furthermore, since the vacuum heat insulating material has high heat insulating performance even with a thickness of several millimeters, the design change for providing the heat insulating function is partial, and the general shutter design does not change significantly. . In addition, since a heat insulating function can be provided with a simple configuration including only a shutter and a glass shoji, the operational feeling during opening and closing is not impaired.

  The heat insulating shutter according to claim 1 of the present invention includes a face member, a frame member having a heat insulating property provided at an end of the face member, and a vacuum heat insulating member disposed on the indoor side of the face member. A shutter provided on a building window, wherein the vacuum heat insulating material provided on each of the slats is supported by the frame member. Without using a special member such as tape or adhesive, the vacuum heat insulating material is securely supported on the face material, minimizing the number of parts and providing a heat insulating function to the shutter in a rational manner. .

  In addition, since the vacuum insulation material has a high heat insulation performance of 4 to 5 times that of urethane foam, it will exhibit a reliable heat insulation function with a slight thickness without changing the design space for configuring the shutter. High thermal insulation performance can be obtained by partial design change of the member.

  According to a second aspect of the present invention, there is provided the heat insulating shutter according to the first aspect, wherein the vacuum heat insulating material according to the first aspect of the invention is bent along the cross-sectional shape of the face material of the slat, and the core material located at the bent portion. And the thickness of the core material located in the other part is thinner than that of the core material, and the vacuum heat insulating material can be easily folded along the cross-sectional shape of the slats. Therefore, excessive stress applied to the laminate film by bending can be suppressed, and shape conformability can be improved and long-term reliability can be ensured.

  According to a third aspect of the present invention, the vacuum heat insulating material according to the first aspect of the present invention has a plurality of core members, and each of the plurality of core members is adjacent to each other in an independent space. The facing laminate films between the core material and the core material are thermally welded to each other, and the core material is interposed between the facing laminate films between the core material and the core material. Is a part where the laminated films are heat-welded with each other, and is bent along the cross-sectional shape of the face material of the slat, and is vacuumed along the cross-sectional shape of the slat It becomes possible to bend the heat insulating material easily and there is no core material in the bent part, so no extra stress is generated on the laminate film, improving the shape compatibility and long-term Furthermore it is possible to secure a-reliability.

  Moreover, since each core material is independent, even if one core material part breaks a bag, there is no influence on another core material part, and the fall of the heat insulation performance of the whole can be suppressed.

  According to a fourth aspect of the present invention, the vacuum heat insulating material according to the second or third aspect is characterized in that the welded portions on at least two sides facing each other among the fin-shaped welded portions on the outer periphery are the core material. The fin-like welded portion around the vacuum heat insulating material is preliminarily bent and temporarily fixed along the core material. Therefore, the step of assembling the vacuum heat insulating material to the frame material can be eliminated, and the heat insulating shutter can be manufactured at low cost.

  According to a fifth aspect of the invention, there is provided the heat insulating shutter according to the fourth aspect, wherein when the shutter is closed, the slats are substantially connected and the frame members provided at the adjacent slat end portions come into contact with each other. It is a feature that suppresses the temperature of the outside air from being transmitted to the interior space of the shutter through the surface material of the slats, and efficiently draws out the original heat insulating performance of the vacuum heat insulating material and exhibits high heat insulating performance. be able to.

  The invention of the heat insulating shutter according to claim 6 is characterized in that, in addition to the invention according to claim 4 or 5, a protective member integrally formed with the frame material is provided on the indoor side surface of the vacuum heat insulating material. Therefore, the face material is assembled after the vacuum heat insulating material is fixed to the integrated frame material, and the slat can be assembled easily.

  Moreover, since the indoor side surface of the vacuum heat insulating material is covered with a protective member, there is no risk of inadvertently touching the vacuum heat insulating material from the indoor side and causing bag breakage, and when viewed from the indoor side, the vacuum heat insulating material directly Can not be seen, it can be summarized in a sophisticated specification.

  In addition to the invention according to any one of claims 1 to 6, the invention of the heat insulating shutter according to claim 7 is configured such that the frame material also serves as a face material, and the frame material is formed by injection molding. Since the frame material can be thinly and uniformly provided around the vacuum heat insulating material, it is possible to secure a large area of the vacuum heat insulating material relative to the area of the entire slat. Insulation performance inherent to insulation can be maximized.

  In addition, in order to integrate the frame material that also serves as the face material and the vacuum heat insulating material by injection molding, after the vacuum heat insulating material is disposed in the mold in advance, the frame material material is placed inside the mold using an injection molding machine. Just inject.

  In addition to the invention according to claim 7, the heat insulating shutter according to claim 8 is the one in which the vacuum heat insulating material is covered with a heat resistant sheet, and the vacuum is made from the high-temperature frame material to be injection-molded. The gas barrier film of the heat insulating material is protected, and the film can be formed without impairing the gas barrier property of the vacuum heat insulating material.

  In addition to the invention described in claim 7 or claim 8, each slat is composed of a plurality of slat pieces, and the plurality of injection-molded slat pieces are formed in the longitudinal direction. Each slat is configured by connecting in the direction, and a slat piece is formed by a relatively small injection mold, and each slat piece is connected to each other according to the width of the opening of the building. A slat will be formed arbitrarily, and a highly heat-insulating shutter can be provided at a lower cost according to the opening specification.

  Hereinafter, embodiments of a heat insulating shutter according to the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a heat insulating shutter according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of a slat in the heat insulating shutter of the same embodiment. FIG. 3 is a cross-sectional view of a vacuum heat insulating material used for the heat insulating shutter of the same embodiment. FIG. 4 is an enlarged cross-sectional view of the slat end portion A in the heat insulating shutter of the embodiment shown in FIG.

  First, the configuration of the heat insulating shutter 105 will be described. The heat insulating shutter 105 is installed outside the window frame 106, and includes a plurality of slats 107, a winding device 109, and a holding member 108 that connects the slat 107 and the winding device 109 and controls the tilting and raising / lowering of the slat 107. It is configured. Furthermore, the slat 107 includes a metal face member 110 such as aluminum, a frame member 111 made of resin or rubber, and having heat insulation properties, and a vacuum heat insulating material 112.

  Here, the thermal conductivity of aluminum constituting the face material 110 is about 200 W / mK, whereas the heat insulation performance of the resin and rubber constituting the frame material 111 is about 0.2 W / mK. The frame material 111 has a high heat insulation performance with respect to the material 110.

  On the other hand, the vacuum heat insulating material 112 is composed of a core material 113 made of powder, foam or fiber, and a laminate film 114 having a gas barrier property, and the core material 113 is provided with a thin portion 113a having a small thickness. In addition, the laminate film 114 includes an outermost protective layer, an inner aluminum foil or a gas barrier layer formed by vapor deposition of aluminum, and an innermost thermal welding layer (not shown).

  Here, the vacuum heat insulating material 112 is heat-welded around the two sides of the two laminated films 114 cut in advance in a rectangular shape, and the core material 113 is inserted between the laminated films 114 formed into a bag shape, A space between the laminate films 114 is evacuated and the remaining one side of the bag-like laminate film 114 is thermally welded.

  As a result, the heat conductivity of the vacuum heat insulating material 112 exhibits a heat insulating performance of about 0.002 to 0.004 W / mK, and can obtain a high heat insulating performance of 5 to 10 times that of urethane foam which is a general heat insulating material. I can do it.

  Next, a method for assembling the slat 107 will be described. In the face material 110, an end portion of the face material 110 is inserted and sandwiched in the notch portion 111a of the frame material 111, and the slat 107 is configured by inserting and sandwiching the vacuum heat insulating material 112 in the notch portion 111b of the frame material 111. Has been.

  In addition, when the vacuum heat insulating material 112 is inserted into the notch 111 b, the fin-like heat welded portion formed at least at the end of the vacuum heat insulating material 112 in contact with the frame material 111 is a surface along the core material 113. The thin portion 113a of the vacuum heat insulating material 112 is folded along the cross-sectional shape of the face material 110 while being folded back to the material 110 side.

  About the heat insulation shutter comprised as mentioned above, the effect | action and effect are demonstrated below.

  First, the slat 107 constituting the heat insulating shutter 105 according to the present embodiment supports the metal face member 110 at the notch 111a of the frame member 111 having heat insulating properties, and the vacuum heat insulating material 112 at the notch 111b. Since it is possible to reliably support the face material 110 and the vacuum heat insulating material 112, it is not necessary to use a special member such as a double-sided tape or an adhesive for fixing the vacuum heat insulating material 112. It is possible to impart a heat insulation function to the shutter in a rational manner while minimizing the above.

  Further, at least two opposite welded portions of the fin-like welded portion on the outer periphery of the vacuum heat insulating material 112 are inserted into the cutout portion 111b of the frame material 111 of the slat 107 while being bent along the core material 113. Therefore, it is not necessary to temporarily fix the welded portion formed around the vacuum heat insulating material 112 along the core material 113 in advance, the process of assembling the vacuum heat insulating material 112 to the frame material 111 can be simplified, and the heat insulating shutter It can be manufactured at low cost.

  On the other hand, since the vacuum heat insulating material 112 has a heat insulating performance as high as 5 to 10 times that of urethane foam, it will exhibit a reliable heat insulating function with a small thickness without changing the design space for configuring the shutter. High thermal insulation performance can be obtained by partial design change of the member.

  Specifically, it is considered that the thickness of the vacuum heat insulating material 112 is preferably about 3 to 5 mm. In the case of 3 mm, the thickness corresponds to 15 to 30 mm of urethane foam, and in the case of 5 mm, it corresponds to 25 to 50 mm of urethane foam. Here, when the thickness of the urethane board used for the wall insulation of the house is considered to be about 30 to 50 mm, it is considered that the insulation performance close to the wall insulation can be obtained by the insulation shutter 105 of the present embodiment. It is done.

  Further, when the heat insulating shutter 105 is closed, the slats 107 tilt and the adjacent slats 107 are substantially connected. At this time, the frame members 111 provided at the ends of the slats 107 come into contact with each other, whereby the surface material 110 of the slats 107 is conducted and the temperature of the outside air is prevented from being transmitted to the indoor space of the shutter 105. The original heat insulating performance of the heat insulating material 112 can be drawn and high heat insulating performance can be exhibited.

  In this embodiment, the frame members 111 are in contact with each other. However, the rubber fins provided on the resin frame member 111 are in contact with the frame member 111 of the other slat 107, so that adjacent slats. The gap between each other can be sealed more reliably, and the performance of the vacuum heat insulating material 112 can be further extracted.

  Further, the vacuum heat insulating material 112 is bent so as to follow the cross-sectional shape of the face material 110 of the slat 107, and the thickness of the core material 113 located at the bent portion is changed to a thin-walled portion 113a thinner than the other portions, thereby providing a slat. The vacuum heat insulating material 112 can be easily bent along the cross-sectional shape of 107, and excessive stress applied to the laminate film 114 due to the bending can be suppressed. Reliability can be ensured.

(Embodiment 2)
FIG. 5 is a slat in the heat insulating shutter according to the second embodiment of the present invention. FIG. 6 is a cross-sectional view of a vacuum heat insulating material used for the heat insulating shutter of the same embodiment. FIG. 7 is an enlarged cross-sectional view of the slat end B in the heat insulating shutter of the same embodiment shown in FIG. Here, the description of the same parts as those in the first embodiment is omitted.

  The plurality of slats 207 constituting the heat insulating shutter 205 are a metal face material 210 such as aluminum, a frame material 211 made of resin or rubber, and having heat insulation properties, a vacuum heat insulating material 212, and a vacuum heat insulating material 112. And a protective member 215 integrated with the frame member 211.

  Here, the protective member 215 is made of a material having a heat insulating property similarly to the frame material 211, and the vacuum heat insulating material 212 is sandwiched between the face material 210 and the frame material 211 integrated with the protective member 214. Has been.

  The vacuum heat insulating material 212 is composed of a plurality of independent core materials 213 made of powder, foam or fiber and a laminate film 214 having a gas barrier property, and each of the plurality of core materials 213 is independent of each other. The facing laminate films 214 between the adjacent core material 213 and the core material 213 are heat-welded so as to be positioned in the space.

  Here, the vacuum heat insulating material 212 is evacuated in a state where a plurality of independent core materials 213 are arranged between the laminate films 214, and the laminate film 214 portions and the core materials 213 portions around each core material 213 are evacuated. It was manufactured by heat-welding the entire surface.

  The vacuum heat insulating material 212 is a portion where the core material 213 does not exist between the facing laminate films 214 between the core material 213 and the core material 213 and the laminate films 214 are thermally welded to each other. It is bent along the cross-sectional shape of the face material 210.

  About the heat insulation shutter comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  In the embodiment of the present invention, the vacuum heat insulating material 212 includes a plurality of core materials 213, and the core materials 213 and 213 adjacent to each other so that each of the plurality of core materials 213 is located in an independent space. The laminated films 214 facing each other are thermally welded to each other, and there is no core material 213 between the opposed laminated films 214 between the core material 213 and the core material 213, and the laminated films 214 are Since the heat-welded portion is bent along the cross-sectional shape of the face material 210 of the slat 207, the vacuum heat insulating material 212 can be easily bent along the cross-sectional shape of the slat 207. Further, since the core material 213 does not exist in the bent portion, no extra stress is generated in the laminate film 214. Furthermore it is possible to secure the reliability.

  Moreover, since each core material 213 maintains the degree of vacuum independently, even if one core material 213 part breaks, there is no influence on other core material 213 parts, and the fall of the whole heat insulation performance is suppressed. And long-term reliability can be further enhanced.

  On the other hand, by providing the protection member 215 integrally formed with the frame material 211 on the indoor side surface of the vacuum heat insulating material 212, the face material 210 is assembled after the vacuum heat insulating material 212 is fixed to the integrated frame material 211. The slat 207 can be easily assembled.

  Moreover, since the indoor side surface of the vacuum heat insulating material 212 is covered with the protective member 215, there is no fear of inadvertently touching the vacuum heat insulating material 212 from the indoor side and causing bag breakage, and directly when viewed from the indoor side. Since the vacuum heat insulating material 212 is not visible, it can be summarized in a sophisticated specification.

(Embodiment 3)
FIG. 8 is a cross-sectional view of an injection molding machine that integrally molds the vacuum heat insulating material and the frame material in the heat insulating shutter according to the third embodiment of the present invention. FIG. 9 is an assembly view of a slat formed by connecting injection-molded slat pieces in the heat insulating shutter of the same embodiment. Here, the description of the same parts as those in the first and second embodiments is omitted.

  The foam molding machine 301 includes a raw material insertion unit 302, a melt injection unit 303, a mold unit 304, and a control unit 305 that controls the drive and cooling temperature of the mold unit.

  Hereinafter, a method of in-mold molding of the slat piece 307a using the injection molding machine 301 will be described.

  First, the vacuum heat insulating material 312 covered with the heat resistant sheet 320 is disposed at a predetermined position inside the mold part 304 of the injection molding machine 301. On the other hand, resin pellets such as ABS, which are raw materials of the frame material 311, are put into the raw material insertion portion 302.

  The charged resin pellets are melted at a temperature of about 250 ° C. or more in the melt injection unit 303, pushed out by the screw 306 built in the melt injection unit 303, and injected into the mold unit 304. The vacuum heat insulating material 312 covered with the sheet 320 is integrally formed to form a slat piece 307a.

  Here, since the mold part 304 has a cooling structure by gas or liquid, the raw material of the frame material 311 injected into the mold part 304 is cooled to a constant temperature. At this time, the control unit 305 can adjust the injection amount of the raw material, the injection temperature, the cooling temperature of the mold unit 304, and the like.

  In addition, the slat 307 is configured by connecting the slat pieces 307 a manufactured by the above-described molding method with the slat connection portion 321.

  About the heat insulation shutter comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  In this embodiment, the resin material of the frame material 311 melted by injection molding flows around the vacuum heat insulating material 312 to form the frame material 311, but the vacuum heat insulating material 312 is covered with the heat insulating sheet 320. Therefore, the gas barrier film of the vacuum heat insulating material 312 is not damaged, and the slat piece 307a can be formed reliably.

  Further, since the frame material 311 can be uniformly formed with a thickness of about 2 to 3 mm around the vacuum heat insulating material 312 covered with the thin heat insulating sheet 320, the vacuum heat insulating material for the area of each slat piece 307a. Since a large area of 312 can be secured, the heat insulation performance of each slat piece 307a can be increased.

  Further, by connecting the slat pieces 307a with the slat connecting portions 321, the slats 307 can be arbitrarily formed in accordance with the opening of the building. As a result, a heat insulating shutter can be formed at low cost using a relatively small injection mold.

  Furthermore, by providing a suspension member (not shown) in the slat connecting portion 321, it is possible to prevent the slat 307 from being bent even for a large opening having a frontage width of 3600 mm or more, for example, and heat insulation of the opening of the building. The performance can be greatly improved.

  As described above, the heat insulating shutter according to the present invention can provide not only a light shielding effect but also an effective heat insulating effect on the outside of a building such as a house. The same configuration is possible even with a sliding door that is a sliding door. In recent years, there are many examples in which a house is provided with a large opening and a large opening is provided, but the heat insulating shutter of the present invention can effectively block cold in winter and solar radiation in summer. On the other hand, it can also be used as an opening insulation method for vehicles such as cars, trains, and bullet trains.

Sectional drawing of the heat insulation shutter in Embodiment 1 of this invention Sectional drawing of the slat of the heat insulation shutter in Embodiment 1 of this invention Sectional drawing of the vacuum heat insulating material used for the heat insulation shutter in Embodiment 1 of this invention The expanded sectional view of the slat end part A of the heat insulation shutter in Embodiment 1 of this invention Sectional drawing of the slat of the heat insulation shutter in Embodiment 2 of this invention Sectional drawing of the vacuum heat insulating material used for the heat insulation shutter in Embodiment 2 of this invention The expanded sectional view of the slat end part B of the heat insulation shutter in Embodiment 2 of this invention Sectional drawing of the injection molding machine used for manufacture of the slat of the heat insulation shutter in Embodiment 3 of this invention The perspective view of the slat of the heat insulation shutter in Embodiment 3 of this invention Cross-sectional view of a conventional multifunction sash Sectional view of a conventional thermal shutter

Explanation of symbols

105, 205 Thermal insulation shutter 107, 207, 307 Slat 110, 210 Face material 111, 211, 311 Frame material 112, 212, 312 Vacuum insulation material 113, 213 Core material 113a Thin part 114, 214 Laminate film 215 Protective member 307a Slat piece 320 Heat-resistant sheet

Claims (9)

A building window composed of a plurality of slats comprising a face material, a heat-insulating frame member provided at an end of the face material, and a vacuum heat-insulating material disposed on the indoor side of the face material. A heat insulating shutter, wherein the vacuum heat insulating material provided on each slat is supported by the frame material. The vacuum heat insulating material is bent so as to follow the cross-sectional shape of the slat face material, and the thickness of the core material located at the bent portion is thinner than the thickness of the core material located at the other part. The heat insulating shutter according to claim 1. The vacuum heat insulating material has a plurality of core materials, and the laminated films facing each other between the core material and the core material adjacent to each other so that each of the plurality of core materials is located in a space independent from each other are thermally welded. In the portion where the core material does not exist between the laminate films facing each other between the core material and the core material, and the laminate films are thermally welded to each other, the surface of the slats The heat insulating shutter according to claim 1, wherein the heat insulating shutter is bent along a cross-sectional shape of the material. The vacuum heat insulating material is inserted into the frame material of the slat in a state in which the welded portions on at least two sides facing each other among the fin-shaped welded portions on the outer periphery are bent along the core material. The heat insulating shutter according to claim 2 or claim 3. 5. The heat insulating shutter according to claim 4, wherein when the shutter is closed, frame members provided at adjacent end portions of the slats are in contact with each other and are substantially connected to each other. The heat insulating shutter according to claim 4 or 5, wherein a protective member integrally formed with the frame member is provided on the indoor side surface of the vacuum heat insulating material. The heat insulating shutter according to claim 1 , wherein the frame material also serves as a face material, and the frame material and the vacuum heat insulating material are integrated by injection molding. The heat insulating shutter according to claim 7, wherein the vacuum heat insulating material is covered with a heat resistant sheet. The heat insulation according to claim 7 or 8, wherein each slat includes a plurality of slat pieces, and each slat is formed by connecting a plurality of injection-molded slat pieces in a longitudinal direction. shutter.

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