JP2018200106A - Heat insulation body - Google Patents

Abstract

To provide a heat insulation body which can improve the workability in placing absorbents and decrease a failure of failing to place absorbents in an absorbent hole.SOLUTION: A vacuum heat insulation panel 1 is constituted by laminating a plurality of sheet bodies composed of respective thin glass wool sheets 18A, 18B, 18C, 18D, providing an absorbent hole 21 in the glass wool sheets 18B, 18C which are intermediate layers in the laminated sheet bodies, enclosing a core material 2 in which a plurality of connected absorbents 3 are placed in the absorbent hole 21, with an outer casing material 4 preventing penetration of gas and water vapor, and reducing a pressure within the outer casing material 4 and sealing the outer casing material 4.SELECTED DRAWING: Figure 15

Description

  The present invention relates to a heat insulator having heat insulation performance.

  As a conventional heat insulator, for example, in Cited Document 1, it is formed of a core material formed by laminating at least two layers of sheet bodies, an adsorbent that adsorbs at least moisture, and a jacket material made of a gas barrier film, The idea of sandwiching the adsorbent with the core material during evacuation without fixing with a tape or the like or forming a recess in the core material is shown.

  Further, in Patent Document 2, in a heat insulator that wraps a core material with a jacket material, depressurizes the inside of the jacket material, seals the opening of the jacket material, and holds the entire periphery in a sealed state, A part composed only of a jacket material that does not include a core material, that is, a fin portion that is folded in a concentrated manner on one surface of a part having a core material is disclosed.

Japanese Patent No. 3507776 JP 2007-40360 A

  However, the conventional heat insulator described above has the following problems.

  In the method of fixing with an adhesive tape as shown in Patent Document 1 or the method of sandwiching the adsorbent without forming a recess in the core material, the adsorbent may be displaced from a predetermined position in the manufacturing process. In addition, when fixing the adsorbent with a tape or the like, a process of peeling the tape from the release liner is necessary, and workability is poor. When the adsorbent is stored and fixed in the concave portion, a step of forming the concave portion in the core material Is necessary.

  A heat insulator used for a refrigerator or the like as shown in Patent Document 1 wraps a core material with a jacket material and seals it with a method such as heat sealing while evacuating the inside. Since such a jacket material is formed in a bag shape by overlapping two sheets and sealing the outer peripheral portion, if the core material is inserted into the outer jacket material, the outer peripheral portion becomes a margin that does not function as a heat insulator, In order to avoid interference with the surroundings, it is folded inside. However, since the core material is usually formed in a quadrilateral shape in plan view, the margin of the outer cover material is folded back at the portions in contact with the corners of the four corners of the core material and is folded back twice, so that the bending curvature is large. The smallest, the stress on the jacket material is increased. For this reason, there is a problem that pinholes and cracks are generated in the jacket material, the degree of vacuum is lost, and the heat insulation performance is lowered.

  Further, in particular, in a core material having a so-called C-plane cut in which a flat square surface is formed at a corner portion, the fin portion of the outer cover material is concentrated on one surface of the portion where the core material is present as in Reference 2. When bent, there is a risk that the fin portion will be bent several times, particularly at the corner portion cut by the C-plane, so that the dimensional tolerance must be increased. Further, the stress of the fin portion becomes large at the edge of the corner portion, and there is a possibility that the jacket material is torn and leakage occurs.

  Conventionally, a core material in which a plurality of thin sheet bodies are laminated is wrapped with an outer cover material, and the interior is decompressed and sealed, and a plurality of adsorbent holes are provided in the intermediate layer of the core material to The heat insulator was manufactured by arranging the adsorbent in the agent hole. However, disposing one adsorbent in each adsorbent hole is inefficient and inefficient. Further, since it is necessary to open the same number of adsorbent holes as the adsorbent, there is a possibility that the adsorbent is forgotten to be disposed in the adsorbent holes.

  The heat insulator has a configuration in which a getter agent is embedded in the core material in order to adsorb and remove moisture and gas generated from the outside or generated from the core material. However, after such a core material is put in a jacket material and vacuum-sealed, the core material is thinned, so that a convex portion due to the thickness of the adsorbent is formed on the surface of the heat insulator. For this reason, there is a problem that the appearance is poor, there is a possibility that a pinhole is generated in the jacket material due to the pressure applied to the convex portion, and there is a problem that a step is generated when the heat insulator is attached and it is difficult to handle.

  In the case of incorporating a heat insulator into a refrigerator or the like, it is known that a groove is formed in the heat insulator in order to avoid pipes and piping of the refrigerator. However, since the surface of the insulator is grooved with a press or roller, the insulator is loaded, and cracks and pinholes are likely to occur in the jacket material. There was a problem that performance deteriorated.

  As described above, the outer peripheral portion of the jacket material is a blank that does not function as a heat insulator, so it is folded inward to avoid interference with the surroundings during installation, but the folded outer peripheral portion is a heat insulator. Because it is in direct contact with the opposite surface, when the heat insulator is attached to a heat-insulated product such as a refrigerator, the outer cover material travels from the outer periphery to the surface, so-called heat bridge that conducts heat to the opposite surface of the heat insulator, There existed a problem which deteriorated the heat insulation performance as the whole heat insulating body.

  A first object of the present invention is to provide a heat insulator that can improve workability when placing an adsorbent and reduce defects forgetting to place the adsorbent in the adsorbent holes.

  A second object of the present invention is to provide a heat insulator that has a good appearance, can reduce the occurrence of pinholes, and can eliminate a step difference during mounting.

  A third object of the present invention is to provide a heat insulating body that can maintain good heat insulating performance without lowering the degree of internal vacuum even when grooving is performed.

  The fourth object of the present invention is to provide a heat insulator that reduces the heat bridge on the surface of the jacket material and does not deteriorate the heat insulation performance of the heat insulator as a whole.

  In the invention of claim 1, by arranging a plurality of adsorbents in the core material in a concentrated manner, moisture inside the jacket material can be adsorbed and performance deterioration as a heat insulator can be reduced. Moreover, since the adsorbents are not arranged one by one in the adsorbent holes, but a plurality of connected adsorbents are arranged in one adsorbent hole, the work of arranging the adsorbents becomes easy. In addition, since the number of places where the adsorbent holes are provided can be reduced, it is possible to reduce defects forgetting to place the adsorbent in the adsorbent holes.

  In the invention of claim 2, quick lime, which is a material that substantially adsorbs gas and moisture, is enclosed in a bag rather than as it is to form an adsorbent, whereby a plurality of adsorbents connected to the adsorbent holes are provided. Handling at the time of arrangement can be facilitated.

  In the invention of claim 3, by providing a space in the buried portion of the core material on which the getter agent is installed, the inside of the jacket material containing the core material is vacuum sealed on the surface of the heat insulator. A convex protrusion due to the thickness of the getter agent can be eliminated. Therefore, the appearance as a heat insulating material is improved, the generation of pinholes in the jacket material due to the pressure applied to the convex portion can be reduced, and the step when the heat insulating body is attached can be eliminated.

  In the invention according to claim 4, since the space embedded in the core material is formed with a space having a dimension corresponding to the rate of change of the thickness of the core material before and after vacuum sealing the inside of the jacket material. Even if the thickness of the core material changes after the inside of the material is vacuum-sealed, it is possible to reliably eliminate the protruding protrusion due to the thickness of the getter agent on the surface of the heat insulator.

  In the invention of claim 5, since a cutout portion and a cutout portion are provided in the fiber assembly, and a space is provided in the embedded portion of the core material by combining them alone or in combination, a getter agent is easily installed in the embedded portion. It becomes possible to do.

  In the invention of claim 6, by enclosing the core material in a double bag structure and grooving the surface of the sub-insulator, the inner jacket material is scratched and leaks. However, the progress of leakage can be stopped by the outer jacket material, which contributes to the improvement of reliability. Further, even when the completed heat insulator is hit or rubbed, the outer jacket material becomes a buffer, and there is an effect of preventing damage to the inner bag. Therefore, even when grooving is performed, the degree of internal vacuum does not decrease and good heat insulation performance can be maintained.

  In the invention of claim 7, even if the completed heat insulator is hit or rubbed, the outer jacket material becomes a buffer, and there is an effect of preventing damage to the inner jacket material. Therefore, even when grooving is performed, the degree of internal vacuum does not decrease and good heat insulation performance can be maintained. Further, since the grooving is performed after the vacuum sealing is completed, the dimensional accuracy of the groove can be made excellent.

  In the invention of claim 8, even if the inner first outer cover material is scratched and leaks by wrapping the core material with a double structure, the outer second outer cover material Can stop the progress of leak and contribute to the improvement of reliability. Further, even if the completed heat insulator is hit or rubbed, the second outer jacket material on the outer side becomes a buffer and has an effect of preventing damage to the first jacket material. Therefore, the degree of internal vacuum does not decrease and good heat insulation performance can be maintained.

  In addition, after vacuum-sealing the inside of the first jacket material, folding the fin portion of the first jacket material and sticking the tape, after vacuum-sealing the inside of the second jacket material, Although the same work is required and the production efficiency is lowered, the first outer cover material and the second outer cover material are folded at the same time, and the tape is attached, so that after sealing for one time. Work can be omitted, and manufacturing efficiency can be increased.

  According to the ninth aspect of the present invention, even if the outer peripheral portion serving as a margin of the outer cover material is folded back, the cover attached to the outer peripheral portion becomes a heat insulating material, and the heat conduction on the surface of the outer cover material is reduced. Therefore, the effect of not deteriorating the heat insulation performance as the whole heat insulator can be obtained by reducing the heat bridge on the surface of the jacket material.

  According to the first aspect of the present invention, it is possible to provide a heat insulator that can improve workability when placing the adsorbent and reduce defects forgetting to place the adsorbent in the adsorbent holes.

  According to invention of Claim 2, the handling at the time of arrange | positioning an adsorbent to an adsorbent hole can be made easy.

  According to the invention of claim 3, it is possible to provide a heat insulator that has a good appearance, can reduce the occurrence of pinholes, and can eliminate the step difference during installation.

  According to the invention of claim 4, after the inside of the jacket material is vacuum-sealed, even if the thickness of the core material changes, the protrusion of the convex shape due to the thickness of the getter agent can be reliably ensured on the surface of the heat insulator. Can be eliminated.

  According to the invention of claim 5, it becomes possible to easily install the getter agent in the buried portion.

  According to the invention of claim 6, even when grooving is performed as the heat insulator, the internal vacuum degree is not lowered, and good heat insulation performance can be maintained.

  According to the invention of claim 7, even when grooving is performed as the heat insulator, the internal vacuum degree is not lowered, and good heat insulation performance can be maintained. In addition, the dimensional accuracy of the groove can be made excellent.

  According to the invention of claim 8, as the heat insulator, the internal vacuum degree is not lowered, and good heat insulation performance can be maintained.

  In addition, it is possible to increase manufacturing efficiency by omitting the work after one sealing.

  According to the ninth aspect of the present invention, it is possible to provide a heat insulator that reduces the heat bridge on the surface of the jacket material and does not deteriorate the heat insulation performance of the whole heat insulator.

It is a disassembled perspective view showing the principal part structure of the heat insulator which shows 1st Example of this invention. FIG. 2 is an overall cross-sectional view in the completed state of the heat insulator. It is a heat insulating body which shows 2nd Example of this invention, Comprising: It is the top view and sectional drawing before apply | coating a protective agent. It is a top view and sectional drawing before bend | folding the outer peripheral part of a jacket material after applying a protective agent same as the above. It is a top view and sectional drawing in the middle of bending the outer peripheral part of a jacket material same as the above. It is the top view and sectional drawing after bending the outer peripheral part of a jacket material same as the above. It is a heat insulating body which shows 3rd Example of this invention, Comprising: It is a top view before bending the fin part of a jacket material. It is a top view in the middle of bending the fin part of a jacket material same as the above. It is a top view in the middle of bending the fin part of a jacket material same as the above. It is a top view after bending the fin part of a jacket material same as the above. FIG. 11 is a plan view immediately after the sub-vacuum heat insulation panel shown in FIG. 10 is vacuum-sealed to another jacket material. It is a top view in the middle of bending the fin part of another jacket material same as the above. It is a top view in the middle of bending the fin part of another jacket material same as the above. It is a top view after bending the fin part of another jacket material same as the above. It is sectional drawing of the heat insulator which shows 4th Example of this invention. It is a top view of a core material same as the above. It is a top view of the core material in the conventional heat insulating body as a comparison with 4th Example. FIG. 9 is a cross-sectional view of a heat insulator that constitutes a space as a buried portion that is a combination of a cutout portion and a cutout portion, showing a heat insulator according to a fifth embodiment of the present invention. FIG. 15 is a cross-sectional view of the heat insulator showing the getter agent embedded in FIG. 14. It is an exploded perspective view of the state which processed the cutout part and the notch part into the core material same as the above. It is sectional drawing of the conventional heat insulator which comprised the space as an embedment part only by a cutout part as a comparison with 5th Example. FIG. 18 is a cross-sectional view of the heat insulator showing the getter agent embedded in FIG. 17. It is sectional drawing which shows the manufacturing process of the heat insulating body which shows 6th Example of this invention. It is sectional drawing which shows another manufacturing process of a heat insulating body same as the above. FIG. 10 is an explanatory diagram showing a state in which a sub-insulator is inserted into a jacket material, showing a heat insulator according to a seventh embodiment of the present invention. It is explanatory drawing which shows the structure in a vacuum vessel same as the above. It is sectional drawing of the heat insulating body in a completion state same as the above. It is sectional drawing of the heat insulating body in the conventional completion state as a comparison with 7th Example. FIG. 10 is a cross-sectional view of a heat insulator showing an eighth embodiment of the present invention in a state where a sub heat insulator is put in a jacket material and vacuum-sealed. It is sectional drawing after performing an ear folding same as the above. It is sectional drawing which shows the assembly order until it attaches to the heat insulation which shows the 9th Example of this invention, Comprising: The core material was wrapped in the jacket material and vacuum-sealed. FIG. 5 is a cross-sectional view showing an assembly sequence from when the cover is attached to the heat insulating body until the outer peripheral portion and the cover are bent. It is sectional drawing which shows the completion state after bending an outer peripheral part and a cover same as the above. It is sectional drawing of the heat insulating body in the conventional completion state as a comparison with 9th Example. It is a heat insulation body which shows 10th Example of this invention, Comprising: It is explanatory drawing which shows the state which inserts a core material in a jacket material. It is explanatory drawing which shows the state after inserting a core material in a jacket material same as the above. It is explanatory drawing which shows the state which sealed the inside of the jacket material same as the above. It is explanatory drawing which shows the state which carried out the ear fold and was tape-stopped same as the above. It is explanatory drawing which shows the state which inserts a core material in a jacket material as a comparison with 10th Example. It is explanatory drawing which shows the state after inserting a core material in a jacket material same as the above. It is explanatory drawing which shows the state which sealed the inside of the jacket material same as the above. It is explanatory drawing which shows the state which carried out the ear fold and was tape-stopped same as the above. It is a heat insulating body which shows 11th Example of this invention, Comprising: It is sectional drawing which shows each vacuum heat insulation part. It is a sectional view of a heat insulator same as the above. FIG. 45 is a cross-sectional view of a heat insulator having a shape different from that of FIG. 44. It is principal part sectional drawing of the heat insulating body which shows 12th Example of this invention. It is principal part sectional drawing of the conventional heat insulating body as a comparison with 12th Example. It is a perspective view in the completion state of the heat insulating body which shows 13th Example of this invention. It is a perspective view before vacuum sealing of a core material same as the above. FIG. 50 is a perspective view after vacuum-sealing the core material shown in FIG. 49. It is sectional drawing at the time of forming a recessed part with a roller same as the above. It is the schematic of the apparatus for obtaining predetermined | prescribed recessed part depth with a roller same as the above.

  Hereinafter, preferred embodiments of the heat insulator in the present invention will be described with reference to the accompanying drawings. In the following embodiments, common portions are denoted by common reference numerals, and description of common portions is omitted as much as possible to avoid duplication.

  1 and 2 show a vacuum heat insulation panel 1 as a heat insulator in the present embodiment. In each of these drawings, the vacuum heat insulating panel 1 is flat and adsorbs moisture or gas, and a core material 2 formed by laminating at least two layers of sheet bodies 2A and 2B as sheet-like molded bodies made of inorganic fibers. It comprises an adsorbent 3 as a desiccant, a jacket material 4 made of a gas barrier film, and a sheet-like fixing member 5 that generates adhesiveness when the temperature exceeds a predetermined temperature. The core material 2 is accommodated in the bag-shaped outer cover material 4 together with the adsorbent 3 and the fixing member 5, and after the inside of the outer cover material 4 is depressurized, the opening of the outer cover material 4 is sealed. A vacuum insulation panel 1 is obtained which is enclosed and sealed around the entire periphery of the material 2.

  The adsorbent 3 is sandwiched between the sheet bodies 2 </ b> A and 2 </ b> B in a state where the fixing member 5 is overlapped, and is fixed without moving to a predetermined position inside the core material 2 by the adhesive force generated by the fixing member 5. In particular, in the present embodiment, in order to fix the adsorbent 3, the core material 2 is not provided with a recess for accommodating the adsorbent 3, and the surfaces of the sheet bodies 2A and 2B are formed flat without any irregularities. . Moreover, the fixing member 5 used in the present embodiment is, for example, a heat welding sheet FB-ML80 manufactured by Nitto Shinko Corporation. Although not shown, this product is a thermoplastic double-sided adhesive sheet in which a baseless adhesive layer is provided on a separator. It is not sticky at room temperature, and sticks at a predetermined temperature of 70 ° C. or higher.

  The jacket material 4 is formed by superposing two sheet members 4A and 4B having the same shape in plan view and heat-sealing the outer peripheral portions (end portions) of the sheet members 4A and 4B. 4 is formed with an ear portion 6 as an excess portion obtained by joining the sheet members 4A and 4B by the heat seal. This ear | edge part 6 becomes a blank which does not function as the vacuum heat insulation panel 1. FIG.

  In order to manufacture the vacuum heat insulation panel 1 shown in FIG. 2, first, the core material 2 formed or cut into a plurality of sheet bodies 2A, 2B in a predetermined shape is heated to a predetermined temperature or higher, and then the laminated sheet bodies 2A, Adsorbent 3 is sandwiched between 2B. At this time, the fixing member 5 is sandwiched between the adsorbent 3 and the fixing member 5 is heated by the heat of the core material 2 to become a predetermined temperature or more and thus exhibits adhesiveness. Is fixed to a predetermined position inside the core member 2 via For this reason, for example, when an adhesive tape is used as the fixing member, a process of peeling the tape from the release liner is required. However, since the fixing member 5 of this embodiment is not provided with such a tape, bother the tape during use. Since it is not necessary to peel off, it is only necessary to overlap the adsorbent 3 and sandwich it between the sheet bodies 2A and 2B, so that workability is good.

  Conventionally, a concave portion is formed in the core material 2 in order to fix the adsorbent 3, but in this embodiment, the step of forming the concave portion in the core material 2 can be omitted by using the fixing member 5. If there is no such recess or fixing member 5, the adsorbent 3 may be displaced from a predetermined position in the manufacturing process of the vacuum heat insulation panel 1. 2 can be eliminated.

  Furthermore, the fixing member 5 is sandwiched between the sheet bodies 2A and 2B in a state of being overlapped with the adsorbent 3, but the fixing member 5 is in a sheet shape much thinner than the core material 2 and the adsorbent 3, The thickness dimension of the vacuum heat insulation panel 1 can be prevented from increasing as much as possible.

  Thereafter, the core material 2 sandwiching the adsorbent 3 and the fixing member 5 is left in the outer cover material 4 having a quadrangular shape in a plan view in which two sheet members 4A and 4B are overlapped in advance and heat-sealed in three directions. It is inserted and accommodated from one of the openings. In this state, for example, a vacuum chamber (not shown) is evacuated to reduce the inside of the jacket material 4 to a predetermined degree of vacuum, and then heat seal the remaining one of the jacket material 4 that is open. Then, the inside is sealed to obtain a vacuum heat insulation panel 1 having a square shape in plan view.

  As for the performance of the vacuum insulation panel 1 after completion, the degree of vacuum inside is important, but when gas is generated from the fixing member 5, the degree of vacuum is lowered and the performance of the vacuum insulation panel 1 is deteriorated. Therefore, the fixing member 5 sealed in the jacket material 4 is made of at least one substance selected from acrylic resin, epoxy resin, phenol resin, styrene resin, polyethylene, polypropylene, polyester resin, polyvinyl alcohol (PVA), and starch. If so, the generation of gas from the fixing member 5 can be suppressed, and the influence on the performance of the vacuum heat insulating panel 1 can be eliminated.

  In addition, since the fixing member 5 of the present embodiment is a base material that does not use a base material, it is not necessary to consider the generation of gas from the base material, and in this respect also, there is a risk of performance deterioration of the vacuum heat insulating panel 1. There is no. Actually, the above-mentioned heat welding sheet FB-ML80 manufactured by Nitto Shinko Co., Ltd. is a fixing member 5 having a polyester resin as a main component and no base material. As a result of evaluation, the performance deterioration of the vacuum heat insulating panel 1 is I couldn't see it.

  As described above, in the present embodiment, the core material 2 formed by laminating two or more layers of the sheet bodies 2A and 2B made of inorganic fibers, the adsorbent 3 that adsorbs at least moisture or gas, and the outside made of at least a gas barrier film. In the vacuum heat insulating panel 1 as a heat insulating body formed by the workpiece 4, the adsorbent 3 is sandwiched between the sheet bodies 2 </ b> A and 2 </ b> B constituting the core material 2 by the fixing member 5 that generates adhesiveness at a predetermined temperature or higher. It has a fixed configuration.

  In this case, in the manufacturing process of the vacuum heat insulating panel 1, after the core material 2 is heated to a predetermined temperature or more, the fixing member 5 is fixed by simply sandwiching the adsorbent 3 between the stacked sheet bodies 2A and 2B. The member 5 becomes sticky by the heat of the core material 2, the adsorbent 3 is fixed in a state of being sandwiched between the sheet bodies 2 </ b> A and 2 </ b> B, and the position of the adsorbent 3 can be prevented from shifting. Moreover, when an adhesive tape is used for the fixing member as in the cited document 1, a step of peeling the tape from the release liner is required. However, if the fixing member 5 emits adhesiveness at a predetermined temperature or higher, such a step can be performed. It becomes unnecessary and the workability is good. Furthermore, there is no need to store the adsorbent 3 in the recess, and an extra step of forming the recess in the core material 2 can be omitted.

  Further, the fixing member 5 of the present embodiment is formed in a sheet shape. In this case, by using the sheet-like fixing member 5, even if the adsorbent 3 and the fixing member 5 are sandwiched, the influence on the thickness of the vacuum heat insulating panel 1 can be reduced.

  In this embodiment, the fixing member 5 contains at least one substance selected from acrylic resin, epoxy resin, phenol resin, styrene resin, polyethylene, polypropylene, polyester resin, polyvinyl alcohol (PVA), and starch. .

  Since the degree of vacuum inside is important for the performance of the vacuum heat insulating panel 1, when gas is generated from the fixing member 5, the degree of vacuum decreases and the performance as the vacuum heat insulating panel 1 deteriorates. However, the generation of gas from the fixing member 5 is suppressed and vacuum is generated if at least one of the acrylic resin, epoxy resin, phenol resin, styrene resin, polyethylene, polypropylene, polyester resin, polyvinyl alcohol, and starch is used. The performance of the heat insulation panel 1 is not affected. In addition, since the fixing member 5 does not use a base material, there is no need to consider the generation of gas from the base material, and the vacuum heat insulation panel 1 that maintains the performance without the risk of characteristic deterioration is provided. it can.

  3-6 has shown the vacuum heat insulation panel 1 as a heat insulating body in a present Example. In each of these drawings, the vacuum heat insulating panel 1 has a flat plate shape, and is constituted by a quadrilateral (rectangular) core material 2 in plan view and an outer covering material 4 made of a gas barrier film. The core material 2 may be composed of a plurality of sheet bodies 2A and 2B as in the first embodiment, and the adsorbent 3 and the fixing member 5 shown in the first embodiment are sandwiched between the sheet bodies 2A and 2B. You may let them. The core material 2 is accommodated in a bag-shaped outer cover material 4, and after the inside of the outer cover material 4 is decompressed, the opening of the outer cover material 4 is sealed to wrap around the entire periphery of the core material 2. A vacuum insulation panel 1 is obtained.

  The jacket material 4 is formed by superposing two sheet members 4A and 4B having the same shape in plan view and heat-sealing the outer peripheral portions (end portions) of the sheet members 4A and 4B. 4 is formed with an ear portion 6 as an excess portion obtained by joining the sheet members 4A and 4B by the heat seal. This ear | edge part 6 becomes a blank which does not function as the vacuum heat insulation panel 1. FIG.

  FIG. 3 shows the vacuum heat insulation panel 1 immediately after the core material 2 is put inside the jacket material 4 and vacuum sealed. In this embodiment, as shown in FIG. 4, a protective agent 12 made of an adhesive or paint is applied to the surface portion of the outer cover material 4 that contacts the corner portion 11 of the core material 2. The protective agent 12 includes at least a portion in contact with the corner portion 11 of the core material 2 on one side or both sides of the jacket material 4 in order to reliably prevent the outside air from entering the jacket material 4. It coat | covers so that the ear | edge part 6 which sealed member 4A, 4B and the bag-like part 7 which has not sealed sheet | seat member 4A, 4B may be straddled.

  Next, as shown in FIG. 5, after a part of the ear | edge part 6 is bent toward the upper surface which is one surface of the core material 2 along a pair of long side which the core material 2 opposes, FIG. Then, the remaining ear portion 6 is bent along the pair of opposing short sides of the core material 2 toward the upper surface, which is also one surface of the core material 2. The order of folding the ear portion 6 of the jacket material 4 is not particularly limited. However, when the ear portion 6 of the jacket material 4 is folded, a pinhole is temporarily formed in a portion of the jacket material 4 that contacts the corner portion 11 of the core material 2. Even if cracks or cracks occur, the protective agent 12 applied to the surface of the jacket material 4 prevents outside air from entering the jacket material 4 and maintains a good degree of vacuum inside the jacket material 4. be able to.

  In addition, since the site | part which is easy to produce a pinhole or a crack becomes the outer side surface (surface with the high risk of hitting directly) of the jacket material 4 which bent the ear | edge part 6 fundamentally, at least the ear | edge part 6 is bent. If the above-mentioned protective agent 12 is applied to the outer surface of the core material 2 in contact with the corner 11, the degree of vacuum inside the jacket material 4 can be satisfactorily maintained with the minimum required application amount. it can. However, the protective agent 12 may be applied not only to the outer surface of the portion that contacts the corner 11 of the core member 2 but also to the inner surface in a state where the ear portion 6 is bent. The degree of vacuum inside the material 4 can be maintained well.

  The adhesive or paint as the protective agent 12 used in the present embodiment is preferably one having a certain degree of viscosity and quick drying characteristics. Moreover, the timing at which the ears 6 are folded back is preferably when the adhesive or paint starts to harden and its viscosity increases. In this way, the ears 6 that are the margins of the vacuum heat insulation panel 1 are all folded back toward the upper surface of the core material 2 so as not to protrude from the side of the core material 2, and the adhesive 12 provides good heat insulation performance. The vacuum heat insulation panel 1 shown in FIG. 6 can be easily attached to the refrigerator or the like without interfering with the surroundings while being maintained.

  As described above, in this embodiment, the core material 2 is wrapped in the bag-like outer covering material 4, and the vacuum as a heat insulator formed by bending the ear portion 6 that is the outer peripheral portion of the outer covering material 4. In the heat insulating panel 1, a protective agent 12 such as an adhesive or a paint is applied to one or both surfaces of the jacket material 4 that contacts the corner 11 of the core material 2.

  In this case, when the outer peripheral portion of the jacket material 4 is bent, even if a pinhole or a crack occurs in a portion in contact with the corner portion 11 of the core material 2, an adhesive or paint applied to the surface of the jacket material 4 The protective agent 12 plays the role of a plug that prevents these, prevents intrusion of outside air, and keeps the degree of vacuum inside the jacket material 4 well. Therefore, it is possible to prevent the heat insulation performance of the vacuum heat insulation panel 1 from being lowered due to the bending of the ear portion 6 of the jacket material 4.

  7-14 has shown the vacuum heat insulation panel 1 as a heat insulating body in a present Example. 7 to 10, the vacuum heat insulation panel 1 has a flat plate shape and has a C-plane cut in which a planar square surface portion 15 is formed in one of the quadrangular (rectangular) corner portions 11 in plan view. It is comprised by the core material 2 and the jacket material 4 which consists of a gas barrier film. The core material 2 may be composed of a plurality of sheet bodies 2A and 2B as in the first embodiment, and the adsorbent 3 and the fixing member 5 shown in the first embodiment are sandwiched between the sheet bodies 2A and 2B. You may let them. Also in the present embodiment, the core material 2 is accommodated in the bag-shaped outer covering material 4, and after the inside of the outer covering material 4 is decompressed, the opening of the outer covering material 4 is sealed, whereby the entire core material 2 is sealed. A vacuum insulation panel 1 is obtained which is enclosed and sealed.

  The jacket material 4 is formed by superposing two sheet members 4A and 4B having the same shape in plan view and heat-sealing the outer peripheral portions (end portions) of the sheet members 4A and 4B. 4 is formed with an ear portion 6 as an excess portion obtained by joining the sheet members 4A and 4B by the heat seal. This ear | edge part 6 becomes a blank which does not function as the vacuum heat insulation panel 1. FIG. Further, in the state where the core material 2 is hermetically sealed, the fin portion 16 composed only of the jacket material 4 that does not include the core material 2 extends from the outer edge of the core material 2 to the outer edge of the jacket material 4. It is formed over. Therefore, the fin part 16 includes the ear part 6 as a heat welding part on the outer peripheral side thereof.

  Moreover, the jacket material 4 of the present embodiment is composed of sheet members 4A and 4B each having a gas barrier layer and a heat welding layer. In particular, the gas barrier layer here is composed of a vapor deposition layer such as an aluminum vapor deposition layer, and the aluminum vapor deposition layer is a film surface that is a base material for fine particles obtained by heating and evaporating aluminum by electron beam or high frequency induction in a high vacuum state. It is made to adhere to. The thickness of the aluminum vapor deposition layer is about 0.05 μm, which is thinner than about 5 to 10 μm, which is the thickness of the aluminum foil layer, and there is a gap between the particles adhering to the substrate. The influence of the heat bridge caused by the material 4 can be reduced. Further, the sheet member 4B that forms one surface of the jacket material 4 and wraps the lower surface side of the core material 2 is formed by forming the gas barrier layer with an aluminum foil layer and the other surface of the jacket material 4, In the sheet member 4A that wraps the upper surface side of the gas barrier layer 2, the gas barrier layer is preferably formed of a vapor deposition layer such as an aluminum vapor deposition layer.

  The vacuum heat insulation panel 1 of the present embodiment wraps the core material 2 with a bag-like outer covering material 4 and forcibly depressurizes the inside of the outer covering material 4, and then seals the opening of the outer covering material 4. Seal all around. Then, the vacuum heat insulation panel 1 is manufactured by folding the fin part 16 comprised only by the jacket material 4 which does not contain the core material 2 between the outer periphery of the core material 2. FIG. Specifically, as shown in FIG. 7, a vacuum heat insulation panel 1 is prepared before folding the fin portion 16 in which the core material 2 is put inside the jacket material 4 and vacuum-sealed, and then shown in FIG. 8. As described above, along the corner surface portion 15 of the core material 2, only a part of the fin portion 16 is folded toward the lower surface which is one surface of the portion where the core material 2 is provided. At this time, the fin portion 16 is folded back toward one surface where the gas barrier layer of the jacket material 4 is the aluminum foil layer of the sheet member 4B.

  Next, as shown in FIG. 9, along the sides that are a pair of opposed outer surface portions of the core material 2, the fin portion 16 is directed toward the upper surface that is the other surface of the portion where the core material 2 is provided. After the part is bent, as shown in FIG. 10, the upper surface which is the other surface of the portion where the core material 2 is also provided along the side which is another pair of outer surface portions of the core material 2 facing each other. The remaining fin part 16 is bent toward. In the above-described series of steps, one surface of the portion where the core material 2 is provided may be the upper surface, and the other surface of the portion where the core material 2 is provided may be the lower surface. The gas barrier layer of 4A may be an aluminum foil layer, and the gas barrier layer of the sheet member 4B may be a vapor deposition layer.

  In the conventional folding procedure, all the fin portions 16 of the jacket material 4 are folded in a concentrated manner on one surface of the portion with the core material 2, but in this case, the fin portions 16 are folded several times at the corner surface portion 15. There was a risk of bending. Further, the stress of the fin portion 16 is increased at the edge of the corner surface portion 15, and there is a possibility that the jacket material 4 is torn and leakage occurs.

  Therefore, in the present embodiment, the fin portion 16 positioned outside the square surface portion 15 is first folded toward one surface of the portion where the core material 2 is present (FIG. 8). Next, the other fin part 16 is folded toward the other surface of the part with the core material 2 (FIGS. 9 and 10). By this series of folding procedures, it is avoided that the fin portion 16 is concentrated and bent on one surface of the core member 2, the deflection of the fin portion 16 in the corner portion 15 is reduced, and the fin at the edge of the corner portion 15 is reduced. The stress of the part 16 can be reduced.

  In addition, by forming the gas barrier layer of the jacket material 4 as a vapor deposition layer such as an aluminum vapor deposition layer, the heat bridge through which heat flows to the other surface through the folded fin portion 16 is reduced, and the heat of the vacuum heat insulating panel 1 is reduced. Conductivity can be reduced. Further, by folding the fin portion 16 toward the surface that is the aluminum foil layer at the corner surface portion 15 of the core material 2, the surface that is the vapor deposition layer of the jacket material 4 is set to the outside, and the heat bridge of the jacket material 4 The influence can be reduced, and the thermal conductivity of the vacuum heat insulating panel 1 can be further reduced.

  As described above, in the present embodiment, the outer cover material 4 having the gas barrier layer and the heat-welding layer covers the core material 2 having the C-face cut corner portion 15, and the inside of the outer cover material 4 is sealed under reduced pressure. In the vacuum heat insulating panel 1 serving as a heat insulator, the outer cover material 4 includes only a part of the fin portion 16 composed of only the outer cover material 4 that does not include the core material 2 between the outer periphery of the core material 2. After being folded toward one surface of a portion of the core material 2 at the corner surface portion 15 of the material 2, another fin portion 16 is provided on the core material 2 on the outer surface portion of the core material 2 different from the corner surface portion 15. It is formed by folding toward the other surface of the part.

  In this case, after the core material 2 is inserted into the bag-shaped outer cover material 4 and the inside is sealed under reduced pressure, the fin portion 16 of the outer cover material 4 is connected to one of the portions of the core material 2 where the core surface 2 is located. The fin portion 16 is folded by folding the fin portion 16 of the outer cover material 4 to the other surface of the portion where the core material 2 is located at the outer surface portion of the core material 2 different from the corner surface portion 15. It is possible to avoid bending in a concentrated manner on one surface of a portion of the core material 2. Thereby, even when the corner portion 11 of the core material 2 has the C-face cut corner portion 15, the deflection of the fin portion 16 of the outer cover material 4 can be reduced, and the stress of the fin portion 16 at the edge of the corner portion 15 can be reduced. Can be reduced.

  In this embodiment, the gas barrier layer constituting the jacket material 4 is a vapor deposition layer.

  In this case, the vapor deposition layer is formed by adhering fine particles obtained by heating and evaporating a base material such as aluminum in a high vacuum state to the film surface. The aluminum vapor deposition layer is thinner than the aluminum foil layer and between the particles. There is a gap. Therefore, if the gas barrier layer constituting the jacket material 4 is a vapor deposition layer, the influence of the heat bridge caused by the jacket material 4 can be reduced.

  Further, in the jacket material 4 of this embodiment, the gas barrier layer on one side is made of an aluminum foil layer, the gas barrier layer on the other side is made of a vapor deposition layer, and the fin portion 16 is made of aluminum at the corner surface portion 15 of the core material 2. It is formed by folding toward the foil layer.

  The vapor deposition layer in this case is obtained by adhering fine particles obtained by heating and evaporating a base material such as aluminum in a high vacuum state to the film surface as described above. The aluminum vapor deposition layer is thinner than the aluminum foil layer, and the particles and There is a gap between the particles. Therefore, by folding the fin portion 16 toward the aluminum foil layer at the corner surface portion 15 of the core material 2, the vapor deposition layer of the jacket material 4 can be placed outside, and the influence of the heat bridge caused by the jacket material 4 can be reduced.

  Next, the vacuum heat insulation panel 1 shown in FIG. 7 to FIG. 10 is put in another jacket material 4 ′ as a sub heat insulation and vacuum sealed, and a vacuum heat insulation panel 1 ′ corresponding to the final heat insulation is obtained. The configuration will be described with reference to FIGS.

  The other jacket material 4 ′ here is similar to the jacket material 4 in that the two sheet members 4A ′ and 4B ′ having the same shape in plan view are overlapped, and the outer periphery of the sheet members 4A ′ and 4B ′. This is formed by heat-sealing the portion (end portion), and at the four-side periphery of the jacket material 4 ′, an ear portion 6 ′ as a surplus portion in which the sheet members 4A ′ and 4B ′ are joined by the heat seal. It is formed. This ear | edge part 6 'becomes a blank which does not function as final vacuum insulation panel 1'. Further, the fin portion 16 ′ composed only of the core material 2, and thus the outer cover material 4 ′ not including the sub vacuum heat insulation panel 1, extends from the outer peripheral edge of the sub vacuum heat insulation panel 1 to the outer peripheral edge of the outer cover material 4 ′. It is formed over the part. Accordingly, the fin portion 16 'includes an ear portion 6' as a heat welding portion on the outer peripheral side thereof. The jacket material 4 ′ itself has the same configuration as the jacket material 4 described above.

  Then, the sub vacuum heat insulation panel 1 is wrapped with a bag-shaped outer covering material 4 ′, the inside of the outer covering material 4 ′ is forcibly depressurized, and then the opening of the outer covering material 4 ′ is sealed to surround the entire periphery. To seal. That is, as shown in FIG. 11, a vacuum heat insulation panel 1 ′ is prepared before folding the fin portion 16 ′ that is vacuum sealed by putting the sub vacuum heat insulation panel 1 inside the jacket material 4 ′. As shown in FIG. 12, along the corner surface portion 15 of the core material 2, only a part of the fin portion 16 ′ is folded toward the lower surface that is one surface of the portion where the core material 2 is provided.

  Next, as shown in FIG. 13, along the sides that are a pair of opposed outer surface portions of the core material 2, toward the upper surface that is the other surface of the portion where the core material 2 is provided, the fin portion 16 ′. 14 is the other surface of the portion where the core material 2 is also provided along the side which is another pair of outer surface portions of the core material 2 facing each other, as shown in FIG. The remaining fin portion 16 'is bent toward the upper surface. In the above-described series of procedures, one surface of the portion where the core material 2 is provided may be the upper surface, and the other surface of the portion where the core material 2 is provided may be the lower surface. Further, the folding direction of the fin portion 16 ′ in FIG. 13 may be the same as the folding direction of the fin portion 16 ′ in FIG. 14.

  As described above, the vacuum heat insulation panel 1 ′ shown in FIG. 11 to FIG. 14 uses the vacuum heat insulation panel 1 manufactured in FIG. It is configured to be sealed in a vacuum.

  In this case, by covering the core material 2 with a double structure of the jacket materials 4 and 4 ', even if the inner jacket material 4 is damaged and leaks, another outer jacket material 4' is formed. Can stop the progress of leak and contribute to the improvement of reliability. Moreover, even if the vacuum heat insulation panel 1 ′ as a completed heat insulating body is hit or rubbed, another outer covering material becomes a buffer and has an effect of preventing damage to the inner covering material 4. Therefore, even when the corner portion 15 having the C-surface cut is provided at the corner portion of the core material 2, the vacuum degree inside the vacuum heat insulating panel 1 'does not decrease, and good heat insulating performance can be maintained.

  Further, in this embodiment, the sub vacuum insulation panel 1 is placed in another outer covering material 4 ′, vacuum sealed for the second time, and then folded on the corner surface portion 15 of the core material 2. It is good also considering the fin part 16 'and the other fin part 16' of another covering material 4 'folded at the outer surface part of the core material 2 as the same folding direction.

  In this case, after the second vacuum sealing, another covering material 4 ′ includes a fin portion 16 ′ folded at the corner surface portion 15 of the core material 2 and another fin portion 16 ′ folded at the outer surface portion of the core material 2. By making the folding direction of the same the folding direction, it is not necessary to turn over the vacuum heat insulation panel 1 ′ during folding, and the productivity can be improved.

  Further, in this embodiment, the sub vacuum insulation panel 1 is placed in another outer covering material 4 ′, vacuum sealed for the second time, and then folded on the corner surface portion 15 of the core material 2. It is good also considering the fin part 16 'and the other fin part 16' of another covering material 4 'folded at the outer surface part of the core material 2 as an opposite folding direction.

  In this case, after the second vacuum sealing, another covering material 4 ′ includes a fin portion 16 ′ folded at the corner surface portion 15 of the core material 2 and another fin portion 16 ′ folded at the outer surface portion of the core material 2. By reversing the folding direction, the deflection of the fin portion 16 ′ of another jacket material 4 ′ and the stress of the fin portion 16 ′ at the edge of the corner surface portion 15 of the core material 2 can be further reduced.

  15 and 16 show the vacuum heat insulation panel 1 as a heat insulator in the present embodiment. In each of these drawings, the vacuum heat insulating panel 1 has a flat plate shape and is laminated with thin glass wool sheets 18A, 18B, 18C, 18D corresponding to the above-mentioned sheet bodies 2A, 2B, and intermediate glass wool sheets 18B, 18B, One adsorbent hole 21 is opened in 18C, and a core material 2 in which a plurality of adsorbents 3 connected in the adsorbent hole 21 are arranged, and gas or moisture is shut off in order to hermetically wrap the core material 2. And the covering material 4 to be formed. Also in the present embodiment, the core material 2 is accommodated in the bag-shaped outer covering material 4, and after the inside of the outer covering material 4 is decompressed, the opening of the outer covering material 4 is sealed, whereby the entire core material 2 is sealed. A vacuum insulation panel 1 is obtained which is enclosed and sealed.

  The jacket material 4 is formed by superposing two sheet members 4A and 4B having the same shape in plan view and heat-sealing the outer peripheral portions (end portions) of the sheet members 4A and 4B. 4 is formed with an ear portion 6 as an excess portion obtained by joining the sheet members 4A and 4B by the heat seal. This ear | edge part 6 becomes a blank which does not function as the vacuum heat insulation panel 1. FIG.

  Each adsorbent 3 is configured by storing powdered or massive slaked lime 23 inside a bag body 24 that is a small bag so that the individual adsorbents 3 are not separated apart inside the adsorbent hole 21. The adsorbent 3 is connected in series at the connecting portion 25. In FIG. 15, four adsorbents 3 are arranged inside one adsorbent hole 21. However, the number of adsorbents 3 is not particularly limited as long as the number is plural, and the connecting portion 25 is disposed between adjacent adsorbents 3 and 3. And a plurality of adsorbents 3 may be connected. In this embodiment, the adsorbent holes 21 are provided in the glass wool sheets 18B and 18C of the intermediate layer. However, the adsorbent holes 21 are formed in all the glass wool sheets 18A, 18B, 18C and 18D so as to penetrate the core material 2. May be provided.

  FIG. 17 shows the configuration of the core 2 in the conventional vacuum heat insulation panel 1 for comparison. The conventional vacuum heat insulation panel 1 is provided with a plurality of adsorbent holes 21A, 21B, and 21C in the intermediate layer of the core material 2 in a plan view in order to increase the absorption efficiency of gas and water vapor inside the jacket material 4, A single adsorbent 3 is disposed in the adsorbent holes 21A, 21B, and 21C. On the other hand, as shown in FIG. 16, in this embodiment, an adsorbent hole 21 is provided in one place of the intermediate layer of the core material 2 in plan view, and a plurality of adsorbents 3 connected to the adsorbent hole 21 are concentrated. By arranging, the absorption efficiency of gas and water vapor inside the jacket material 4 is further increased. Therefore, unlike the conventional adsorbent holes 21A, 21B, and 21C, the adsorbent hole 21 of the present embodiment is formed in a size that can accommodate a plurality of adsorbents 3 instead of one.

  And in the said structure, the several adsorbent 3 previously connected by the connection part 25 is arrange | positioned in the one adsorbent hole 21 provided in the core material 2 at the manufacturing process of the vacuum heat insulation panel 1, and these are bag-shaped. The outer covering material 4 is accommodated. There is only one adsorbent hole 21, and if a plurality of adsorbents 3 connected to each other are placed there, the arrangement work of all the adsorbents 3 is easily completed. Moreover, since there are few places which provide the adsorbent hole 21 compared with the past, the defect which forgets to arrange | position the adsorbent 3 during a work can be reduced. Thereafter, the inside of the jacket material 4 is depressurized, and the opening of the jacket material 4 is sealed, whereby the vacuum heat insulating panel 1 that is wrapped around the entire periphery of the core material 2 is obtained.

  As described above, the vacuum heat insulation panel 1 as a heat insulator of the present embodiment includes a plurality of thin glass wool sheets 18A, 18B, 18C, and 18D, and a glass wool sheet that is an intermediate layer of the laminated sheet bodies. An adsorbent hole 21 is provided in 18B and 18C, and the core material 2 in which a plurality of adsorbents 3 connected to the adsorbent hole 21 is disposed is wrapped with an outer cover material 4 that prevents the permeation of gas and water vapor. The inside of the material 4 is sealed and then sealed.

  In this case, by disposing the plurality of adsorbents 3 in the core material 2 in a concentrated manner, moisture inside the jacket material 4 can be adsorbed and performance deterioration as the vacuum heat insulating panel 1 can be reduced. Moreover, since the adsorbents 3 are not arranged in the adsorbent holes one by one, but a plurality of adsorbents 3 connected to each other are arranged in one adsorbent hole 21, the work of arranging the adsorbents 3 becomes easy. . Moreover, since the location which provides the adsorbent hole 21 can be reduced, the defect which forgets to arrange | position the adsorbent 3 in the adsorbent hole 21 can be reduced.

  Further, each adsorbent 3 in the present embodiment is configured by sealing quicklime 23 in a bag body 24.

  In this case, a plurality of adsorbents 3 connected to the adsorbent holes 21 are formed by filling quick lime 23, which is a material that substantially adsorbs gas and moisture, into an adsorbent 3 by enclosing it in a bag 24 instead of as it is. The handling at the time of arranging can be made easy.

  18-20 has shown the vacuum heat insulation panel 1 as a heat insulating body in a present Example. In each of these drawings, the vacuum heat insulating panel 1 has a flat plate shape, a quadrangular (rectangular) core material 2 in plan view, an outer cover material 4 made of a gas barrier film, granular calcium oxide, zeolite, silica gel, etc. And a getter agent 25 corresponding to the adsorbent 3 described above. The core material 2 is formed by stacking a plurality of fiber assemblies 26A, 26B, and 26C that are substantially planar. The fiber aggregates 26A, 26B, and 26C that are compressively deformed correspond to the sheet bodies 2A and 2B described above, and the number of sheets is not particularly limited. The core material 2 and the getter agent 25 are accommodated in a bag-shaped outer cover material 4, and after the inside of the outer cover material 4 is depressurized, the opening of the outer cover material 4 is sealed so that the entire periphery of the core material 2 The vacuum heat insulation panel 1 which is wrapped and sealed is obtained.

  The jacket material 4 is formed by superposing two sheet members 4A and 4B having the same shape in plan view and heat-sealing the outer peripheral portions (end portions) of the sheet members 4A and 4B. 4 is formed with an ear portion 6 as an excess portion obtained by joining the sheet members 4A and 4B by the heat seal. This ear | edge part 6 becomes a blank which does not function as the vacuum heat insulation panel 1. FIG.

  In the present embodiment, an embedded portion 28 for arranging the getter agent 25 is provided inside the core material 2. The configuration and operational effects of the buried portion 28 will be described in detail.

  When the thickness of the fiber assemblies 26A, 26B, and 26C described above is, for example, 4 mm, the getter agent 25 having a thickness of about 5 mm is provided in the core material 2 without providing a space as the embedded portion 28 in the core material 2. It is assumed that a vacuum heat insulation panel is manufactured, which is sandwiched and placed in a bag-shaped outer covering material 4 having gas barrier properties and the inside is sealed under reduced pressure. In this case, if the thickness of the core material 2 is compressed to 70% compared with that before the vacuum sealing after the inside of the jacket material 4 is vacuum sealed, the thickness of the core material 2 after the vacuum sealing is 12 mm × 0.7 = 8.4 mm. If the getter agent 25 having a thickness of about 5 mm is sandwiched between the cores 2 and vacuum sealed there, even if the getter agent 25 is somewhat compressed, the thickness of the vacuum heat insulation panel at the portion sandwiching the getter agent 25 is reduced. The length becomes around 13.4 mm, and a convex protruding portion is formed.

  As a countermeasure, as shown in FIG. 21 and FIG. 22, in the core material 2 made of the three fiber assemblies 26 </ b> A, 26 </ b> B, 26 </ b> C, the middle fiber assembly 26 </ b> B is cut out to form the cutout portion 29. The cut-out portion 29 is formed as a space for the embedded portion 28 of the getter agent 25.

  In this case, the core material 2 in which the getter agent 25 is disposed in the embedded portion 28 is placed in the jacket material 4 to obtain the vacuum heat insulating panel 1 whose inside is sealed under reduced pressure, but other fibers in which the getter agent 25 is not disposed. Assuming that the aggregates 26A and 26C are compressed to 70% after vacuum sealing compared to before vacuum sealing, the thickness is 8 mm × 0.7 = 5.6 mm, and the thickness of the embedded portion 28 in which the getter agent 25 is disposed is as follows. Since the thickness is 5 mm (because the getter agent 25 is thicker than the fiber assembly 26B of the core material 2, the thickness of the getter agent 25 becomes the thickness of the embedded portion 28), the thickness of the portion where the getter agent 25 is embedded The thickness of the vacuum heat insulation panel 1 is around 10.6 mm. Accordingly, this is also thicker than 8.4 mm, which is the thickness of the vacuum heat insulating panel 1 other than the portion where the getter agent 25 is embedded, and the convex portion 30 as a convex protruding portion that impairs the appearance as shown in FIG. However, it will be formed in the upper surface and lower surface of the vacuum heat insulation panel 1, respectively.

  On the other hand, in the present embodiment, as shown in FIGS. 18 to 20, the fiber assemblies 26 </ b> A and 26 </ b> C other than the cut-out process have openings in the same shape as the opening surface of the cut-out portion 29 on the surface facing the cut-out portion 29. Recessed notches with a depth of 1.6 mm having a surface are respectively formed, and this is used as a notch 31, and an embedded portion 28 for arranging a getter agent 25 in which the notch 29 and the notch 31 are combined is arranged. As a space. The core material 2 in which the getter agent 25 is disposed in such a buried portion 28 is placed in the jacket material 4 to obtain the vacuum heat insulating panel 1 whose inside is sealed under reduced pressure.

  In this case, assuming that the thickness of the core material 2 is compressed to 70% compared with that before the vacuum sealing after the inside of the jacket material 4 is vacuum sealed, the two fiber aggregates 26A in the notch portion 31 are used. , 26C is (4-1.6) × 2 × 0.7 = 3.36 mm, and the thickness of the getter agent 25 is 5 mm. Therefore, the vacuum heat insulating panel 1 has the getter agent 25 embedded therein. The thickness of the portion is about 8.4 mm, which is substantially the same as the thickness (8.4 mm) of the other portion where the getter agent 25 is not embedded. Accordingly, as shown in FIG. 15, even when the getter agent 25 is disposed in the embedded portion 28 and the inside of the outer cover material 4 is vacuum-sealed, the conventional protruding protrusion (convex portion 30) does not occur. Does not occur.

  Thus, by providing the space of the embedded portion 28 in which the getter agent 25 is disposed according to the rate of change in thickness before and after vacuum sealing of the core material 2 placed in the jacket material 4, vacuum insulation is provided. The protrusion due to the thickness of the getter agent 25 on the surface of the panel 1 can be eliminated, and the appearance of the vacuum heat insulating panel 1 can be improved. In addition, as shown in FIG. 18, it is possible to reduce the occurrence of pinholes in the jacket material 4 due to the pressure applied to the convex portion 30, and to eliminate the step when the vacuum heat insulation panel 1 is attached.

  In addition, when there is a difference in the thickness of the getter agent 25 due to the deviation of the grains stored in the packaging material, the spatial dimension of the embedded portion 28 may be determined based on the maximum thickness of the getter agent 25. Further, the notch 31 may be any shape as long as it matches the shape of the getter agent, such as a semicircular shape, and is not specified, even if it is not concave. Furthermore, in the present embodiment, the embedded portion 28 having a space of a predetermined size is formed by the combination of the cutout portion 29 and the cutout portion 31 so that the convex portion 30 does not occur even after vacuum sealing. In consideration of the thicknesses of the fiber assemblies 26A, 26B, 26C, the thickness of the getter agent 25, and the thickness change rate before and after the vacuum sealing of the core material 2, only the cutout portion 29 or the cutout portion 31 is used. You may form the embedding part 28 which has the space of a dimension.

  As described above, the vacuum heat insulation panel 1 which is a heat insulator of the present embodiment includes the core material 2 formed by laminating a plurality of plate-like fiber assemblies 26A, 26B, and 26C and the embedded portion 28 of the core material 2. In the case where the getter agent 25 to be installed is put in the jacket material 4 having gas barrier properties and the inside of the jacket material 4 is sealed in a vacuum, the inside of the jacket material 4 is vacuum-sealed, and then the vacuum is applied. A space having a dimension such that the convex portion 30 due to the thickness of the getter agent 25 is not formed on the surface of the heat insulating panel 1 is provided in the embedded portion 28 of the core material 2.

  In this case, by providing a space in consideration of the thickness of the getter agent 25 in the embedded portion 28 of the core member 2 where the getter agent 25 is installed, the inside of the jacket material 4 containing the core member 2 is vacuum-sealed. Even after this, the protruding protrusion due to the thickness of the getter agent 25 on the surface of the vacuum heat insulating panel 1 can be eliminated. Therefore, the appearance as the vacuum heat insulation panel 1 is improved, the generation of pinholes in the outer cover material 4 due to the pressure applied to the convex portion 30 can be reduced, and the step when the vacuum heat insulation panel 1 is attached can be eliminated. .

  Moreover, the embedding part 28 of the core material 2 in the present embodiment provides a space corresponding to the rate of change of the thickness of the core material 2 before and after the envelope material 4 is vacuum-sealed.

  In this case, a space having a dimension corresponding to the rate of change of the thickness of the core material 2 before and after the inside of the jacket material 4 is vacuum-sealed is formed in the embedded portion 28 of the core material 2. Even if the thickness of the core material 2 changes after the inside of the workpiece 4 is vacuum-sealed, it is possible to reliably eliminate the protruding protrusion due to the thickness of the getter agent 25 on the surface of the vacuum heat insulating panel 1.

  Further, the embedded portion 28 of the core material 2 in the present embodiment has a cutout portion 29, a concave cutout portion 31, or a cutout portion 29 provided in the fiber assemblies 26A, 26B, and 26C constituting the core material 2. A space for installing the getter agent 25 is provided by combining the portions 31.

  In this case, the cutout portions 29 and the cutout portions 31 are provided in the fiber assemblies 26A, 26B, and 26C, and the space is provided in the embedded portion 28 of the core material 2 by combining them alone or in combination. It is possible to easily install the getter agent 25 in the embedded portion 28 while reliably eliminating the protruding protrusion due to the thickness of the getter agent 25 on the surface.

  23 and 24 show a vacuum heat insulation panel 1 'as a heat insulator in the present embodiment. In common with each of these drawings, the sub vacuum heat insulation panel 1 serving as a sub heat insulator has a flat plate shape, a quadrilateral (rectangular) core material 2 in plan view, and an outer cover material 4 made of a gas barrier film. Consists of. The core material 2 may be composed of a plurality of sheet bodies 2A and 2B as in the first embodiment, and the adsorbent 3 and the fixing member 5 shown in the first embodiment are sandwiched between the sheet bodies 2A and 2B. You may let them. The core material 2 is accommodated in a bag-shaped outer cover material 4, and after the inside of the outer cover material 4 is decompressed, the opening of the outer cover material 4 is sealed to wrap around the entire periphery of the core material 2. Thus, the sub vacuum insulation panel 1 is obtained.

  The outer cover material 4 is formed as a laminated bag having a barrier property by superposing two sheet members 4A and 4B having the same shape in plan view and heat-sealing the outer peripheral portions (end portions) of the sheet members 4A and 4B. Therefore, an ear portion 6 is formed on the outer periphery of the outer cover material 4 as an excessive portion where the sheet members 4A and 4B are joined by the heat seal. This ear | edge part 6 becomes a blank which does not function as the vacuum heat insulation panel 1. FIG.

  In the example shown in FIG. 23, a groove portion 35 is formed on the surface of the vacuum heat insulating panel 1 in which the core material 2 is placed inside the jacket material 4 and vacuum-sealed (see FIG. 23A). Although this groove part 35 is formed by performing grooving by the external force by a press, a roller, etc. from the outer side of the vacuum heat insulation panel 1, the number and shape are not specifically limited. Next, as shown in FIG. 23 (B), the vacuum heat insulation panel 1 after the groove portion 35 is formed is put in the jacket material 4 'and vacuum-sealed.

  The outer cover material 4 is a laminated bag having a barrier property, and two sheet members 4A ′ and 4B ′ having the same shape in plan view are overlapped, and the outer peripheral portions (end portions) of the sheet members 4A ′ and 4B ′ are heat sealed. In the outer periphery of the outer cover material 4, an ear portion 6 ′ is formed on the outer periphery of the outer cover material 4 as an excess portion obtained by joining the sheet members 4 </ b> A ′ and 4 </ b> B ′ by the heat seal. The ear 6 is a blank space that does not function as the final vacuum insulation panel 1 '. The jacket material 4 ′ itself has the same configuration as the jacket material 4 described above.

  FIG. 23C shows the vacuum heat insulation panel 1 ′ in a completed state after the vacuum heat insulation panel 1 is put in the jacket material 4 ′ and vacuum sealed. By reducing the pressure inside the jacket material 4 ′, the inner surface of the jacket material 4 ′ is brought into close contact with the outer surface of the vacuum heat insulation panel 1, and the groove portion 35 corresponding to the shape of the groove portion 35 is formed on the surface of the vacuum heat insulation panel 1 ′. 'Is formed.

  FIG. 24 sequentially shows manufacturing steps different from those described in FIG. 23 for the vacuum heat insulating panel 1 ′. Here, in FIG. 24A, after manufacturing the vacuum heat insulation panel 1 in which the core material 2 is put inside the jacket material 4 and vacuum-sealed, the vacuum insulation is performed on the jacket material 4 ′ without performing grooving. Panel 1 is placed and vacuum sealed. By reducing the pressure inside the jacket material 4 ′, the inner surface of the jacket material 4 ′ is brought into close contact with the outer surface of the vacuum heat insulating panel 1 (see FIG. 24B).

  Thereafter, a groove 35 ′ is formed on the surface of the vacuum heat insulating panel 1 ′ in which the sub vacuum heat insulating panel 1 is placed in the outer cover material 4 ′ and vacuum-sealed (see FIG. 24C). The groove 35 'is formed by grooving with a press or a roller from the outside of the vacuum heat insulating panel 1', but the number and shape are not particularly limited. By forming the groove portion 35 ′ in the vacuum heat insulating panel 1 ′, the groove portion 35 having a shape corresponding to the groove portion 35 ′ is also formed in the sub vacuum heat insulating panel 1. Next, as shown in FIG. 23 (B), the vacuum heat insulation panel 1 after the groove portion 35 is formed is put in the jacket material 4 'and vacuum-sealed.

  As described above, the vacuum heat insulating panel 1 ′ as the heat insulating body shown in FIG. 23 of the present embodiment has the core material 2 inserted into the outer covering material 4 which is a laminated bag having a barrier property, A groove portion 35 is formed by grooving on the surface of the vacuum heat insulating panel 1 as a sub heat insulating material that is vacuum-sealed, and the vacuum heat insulating panel 1 is further placed in a jacket material 4 ′ that is a laminate bag having a barrier property. The inside of the jacket material 4 ′ is vacuum-sealed to form a groove 35 ′ on the surface of the vacuum heat insulating panel 1 ′.

  In this case, when the outer cover materials 4 and 4 ′ are formed in a double bag structure and the core material 2 is wrapped, the inner cover material 4 is damaged when the surface of the vacuum heat insulating panel 1 ′ is grooved. Even if a leak occurs, the outer jacket material 4 ′ can stop the progress of the leak, which contributes to the improvement of reliability. Further, even if the completed vacuum heat insulating panel 1 ′ is hit or rubbed, the outer jacket material 4 ′ becomes a buffer and has an effect of preventing damage to the inner jacket material 4. Therefore, even when grooving is performed on the vacuum heat insulation panel 1 ', the degree of vacuum inside the vacuum heat insulation panel 1' does not decrease, and good heat insulation performance can be maintained.

  In addition, the vacuum heat insulating panel 1 ′ as a heat insulating body shown in FIG. 24 of the present embodiment puts the core material 2 in the outer cover material 4 which is a laminate bag having a barrier property, and vacuum seals the inside of the outer cover material 4. The vacuum insulation panel 1 as the stopped sub-insulator is put in the jacket material 4 ′, which is a laminate bag having a barrier property, and the inside of the jacket material 4 ′ is vacuum-sealed. A groove part 35 ′ is formed on the surface by grooving.

  In this case, even if the completed vacuum heat insulation panel 1 ′ is hit or rubbed, the outer jacket material 4 ′ becomes a buffer and has an effect of preventing damage to the inner jacket material 4. Therefore, even when grooving is performed on the vacuum heat insulation panel 1 ', the degree of vacuum inside the vacuum heat insulation panel 1' does not decrease, and good heat insulation performance can be maintained. Furthermore, since the grooving by the external force is performed after the vacuum sealing inside the outer jacket material 4 ′ is completed, the dimensional accuracy of the groove 35 ′ is superior to the grooving performed first. be able to.

  25 to 27 show the manufacturing process of the vacuum heat insulating panel 1 ′ in the sixth embodiment, and the configuration of each part is completely the same as that in the sixth embodiment.

  First, in FIG. 25, the vacuum heat insulation panel 1 as a sub heat insulator is put into a bag-shaped outer covering material 4 '. The outer cover material 4 ′ is formed with an ear portion 6 ′ in which the ends of the other sheet members 4 </ b> A ′ and 4 </ b> B ′ are heat-sealed, leaving an opening 36 for inserting the vacuum heat insulating panel 1. As described with reference to FIG. 23, the vacuum heat insulating panel 1 is previously formed with the groove portion 35 by grooving.

  Next, as shown in FIG. 26, the vacuum insulation panel 1 ′ before completion in which the vacuum insulation panel 1 is placed in the jacket material 4 ′ is placed in the vacuum container 38. Inside the vacuum vessel 38, a clamping part 39 for clamping the vacuum heat insulating panel 1 'and a sealing device 40 for thermally welding the opening 36 are arranged. Then, while operating the pump 41 communicating with the vacuum vessel 38, the inside of the outer cover material 4 ′ is decompressed by pressurizing the vacuum heat insulating panel 1 ′ from the outside by the clamping portion 39, and the sealing device 40 opens the opening portion. 36 is sealed to seal the inside of the jacket material 4 ′. The sealing pressure of the jacket material 4 ′ at this time can be adjusted as appropriate by controlling the pressure applied to the vacuum heat insulating panel 1 ′ by the clamping part 39 and the operation of the pump 41.

  The second pressure when the vacuum insulation panel 1 is put into the jacket material 4 ′ and vacuum-sealed is the vacuum pressure that the core material 2 is put into the jacket material 4 when the vacuum insulation panel 1 is manufactured. The pressure is equal to or less than the first pressure. In this way, the shape of the groove 35 formed in the vacuum heat insulating panel 1 is maintained even after the vacuum heat insulating panel 1 is put in the jacket material 4 ′ and vacuum sealed.

  FIG. 27 shows the vacuum heat insulation panel 1 ′ in a completed state after the vacuum heat insulation panel 1 is put in the jacket material 4 ′ and vacuum sealed. By reducing the pressure inside the jacket material 4 ′, the inner surface of the jacket material 4 ′ is brought into close contact with the outer surface of the vacuum heat insulation panel 1, and the groove portion 35 corresponding to the shape of the groove portion 35 is formed on the surface of the vacuum heat insulation panel 1 ′. 'Is formed. As a comparison, FIG. 28 shows a cross-sectional shape of a vacuum heat insulation panel 1 ′ in a conventional completed state. In this case, the depth of the groove 35 ′ of the completed vacuum heat insulation panel 1 ′ is shallower than that shown in FIG. 27 due to the internal pressure difference between the first and second sealing.

  As described above, the vacuum heat insulation panel 1 ′ of the present embodiment has a groove portion formed by grooving on the surface of the vacuum heat insulation panel 1 in which the core material 2 is put in the jacket material 4 and the inside is vacuum-sealed with a predetermined pressure. 35 is formed, and this vacuum heat insulation panel 1 is further put into another outer cover material 4 ′ and vacuum sealed at a pressure equal to or lower than the predetermined pressure.

  In this case, when covering the surface of the vacuum heat insulating panel 1 ′ by wrapping the core material 2 by wrapping the core material 2 by wrapping the core material with the outer cover materials 4, 4 ′ having a double bag structure, Even if the workpiece 4 is scratched and leaks, the outer jacket material 4 ′ can stop the leakage and contribute to the improvement of reliability. Further, even if the completed heat insulator is struck or rubbed, the outer jacket material 4 ′ becomes a buffer and has an effect of preventing damage to the inner jacket material 4. Therefore, even when grooving is performed on the vacuum heat insulation panel 1 ', the degree of vacuum inside the vacuum heat insulation panel 1' does not decrease, and good heat insulation performance can be maintained.

  Further, at the time of the second vacuum sealing, the sealing pressure is set to a pressure equal to or lower than that at the time of the first vacuum sealing. Due to the internal pressure difference, the problem that the depth of the groove portion 35 ′ of the completed vacuum heat insulation panel 1 ′ becomes shallow can be solved, and the dimensional accuracy of the groove portion 35 ′ can be improved.

29 and 30 show a vacuum heat insulation panel 1 ′ as a heat insulator in the present embodiment. Each structure of vacuum insulation panel 1 'here is common in what was shown in Example 6,7. In this embodiment, the grooves 35 and 35 'are not provided, but may be provided as necessary. The core material 2 is made of, for example, a sheet or board made of inorganic fibers laminated in a plurality of layers. After the core material 2 is wrapped with the first jacket material 4 and the inside of the jacket material 4 is decompressed and sealed, Furthermore, it is set as the double bag structure sealed after enclosing with 2nd outer covering material 4 'and decompressing the inside of outer covering material 4'.
The jacket materials 4 and 4 ′ are each formed of a material that inhibits the permeation of gas and water vapor.

  The jacket material 4 is formed by superposing two sheet members 4A and 4B having the same shape in plan view and heat-sealing the outer peripheral portions (end portions) of the sheet members 4A and 4B. 4, the ear | edge part 6 which joined sheet | seat member 4A, 4B by the said heat seal is formed. Further, in the state where the core material 2 is hermetically sealed, the fin portion 16 composed only of the jacket material 4 that does not include the core material 2 extends from the outer edge of the core material 2 to the outer edge of the jacket material 4. It is formed over. Therefore, the fin part 16 includes the ear part 6 as a heat welding part on the outer peripheral side thereof.

  Similarly, the covering material 4 ′ is formed by superposing two sheet members 4A ′ and 4B ′ having the same shape in plan view and heat-sealing the outer peripheral portions (end portions) of the sheet members 4A ′ and 4B ′. Thus, an ear portion 6 ′ in which the sheet members 4A ′ and 4B ′ are joined by the heat seal is formed on the four-side periphery of the jacket material 4 ′. In addition, the fin portion 16 ′ composed only of the jacket material 4 ′ not including the core material 2 in a state in which the sub vacuum heat insulating panel 1 is hermetically housed in the interior is formed from the outer peripheral end portion of the core material 2. It is formed over the outer peripheral edge of 4 ′. Accordingly, the fin portion 16 'includes an ear portion 6' as a heat welding portion on the outer peripheral side thereof.

  In this embodiment, it is easy to insert the sub vacuum insulation panel 1 into the second outer cover material 4 ′, and damage caused by the corners of the first outer cover material 4 hitting the second outer cover material 4 ′. Therefore, the inner dimension L2 of the second outer covering material 4 ′ is formed to be larger than the outer dimension L1 of the first outer covering material 4 by 1 mm or more, which is a predetermined dimension.

  In addition, as shown in FIG. 30, after the sub vacuum insulation panel 1 is placed in the jacket material 4 ′ and vacuum sealed, the fin portion 16 including the ear portion 6 of the jacket material 4, and the jacket material 4. The fin portion 16 'including the' ear portion 6 'is folded (ear-folded) simultaneously, not separately, along the outer surface of the vacuum heat insulating panel 1'. Further, an adhesive tape (not shown) is pasted between the end surface of the folded portion and the surface of the covering material 4 ′ so that the bent fin portions 16, 16 ′ do not return to the original state. wear. This ear-folding and tape application work needs to be performed only once after the sub-vacuum insulation panel 1 is put in the jacket material 4 ′ and vacuum-sealed. The work after sealing for one time can be omitted as compared with the case where the tape is folded and taped.

  In this way, the outer vacuum jacket panel 1 is wrapped with the outer jacket material 4 ′ having a size larger than the inner jacket material 4, the inside of the jacket material 4 ′ is vacuum-sealed, and finally the outer jacket material 4 ′ is sealed. By simultaneously folding the fins 16 and 16 ′ of the workpiece 4 and the outer jacket material 4 ′, the working efficiency can be significantly increased. Moreover, the fin parts 16 and 16 ′ can be fixed in a state where the fin parts 16 and 16 ′ are overlapped on the outer surface side of the vacuum heat insulating panel 1 ′ by applying tape to the fin parts 16 and 16 ′ which are folded at the ears.

  As described above, the vacuum heat insulation panel 1 ′ as a heat insulator in the present embodiment is the first outside that inhibits the permeation of gas and water vapor from the core material 2 made of a sheet or board made of inorganic fibers laminated in a plurality of layers. After obtaining the sub vacuum insulation panel 1 wrapped with the covering material 4 and depressurizing and sealing the inside of the covering material 4, the vacuum insulation panel 1 is wrapped with another second covering material 4 ′. The inside of the workpiece 4 ′ is sealed after being depressurized.

  In this case, by enveloping the core material with the outer cover material having a double structure, even if the inner first outer cover material is scratched and a leak occurs, the leak progresses in the outer second outer cover material. This helps to improve reliability. Further, even if the completed heat insulator is hit or rubbed, the second outer jacket material on the outer side becomes a buffer and has an effect of preventing damage to the first jacket material. Therefore, the degree of internal vacuum does not decrease and good heat insulation performance can be maintained.

  Further, in the vacuum heat insulating panel 1 ′ of the present embodiment, the inner dimension L <b> 2 of the second outer covering material 4 ′ is larger than the outer dimension L <b> 1 of the first outer covering material 4 by 1 mm or more. As described above, by making the inner dimension L2 of the second outer covering material 4 ′ larger than the outer dimension L1 of the first outer covering material 4, the insertion work into the second outer covering material 4 ′ can be easily performed. In addition, damage caused by the corners of the first jacket material 4 hitting the second jacket material 4 ′ can be reduced.

  In addition, the vacuum heat insulating panel 1 ′ of the present embodiment is a tape (adhesive tape) (not shown) by simultaneously folding the fin portion 16 of the first jacket material 4 and the fin portion 16 ′ of the second jacket material 4. It is composed by sticking.

  In this case, after the inside of the first covering material 4 is vacuum-sealed, the fin portion 16 of the first covering material 4 is folded and a tape is attached, so that the inside of the second covering material 4 ′ After vacuum sealing, the same operation of folding the fin portion 16 ′ and attaching the tape is required, and the manufacturing efficiency is reduced. However, the fin portion 16 and the second outer cover of the first outer cover material 4 are reduced. By simultaneously folding the fin portion 16 ′ of the material 4 ′ and sticking the tape, it is possible to omit the work after sealing for one time and increase the production efficiency.

  FIGS. 31-33 has shown the vacuum heat insulation panel 1 as a heat insulating body in a present Example. In common with each of these drawings, the vacuum heat insulating panel 1 is common to those of the above-described embodiments, in which the core material 2 is wrapped with the outer covering material 4 and the inside of the outer covering material 4 is vacuum-sealed. Composed. Although not shown in each of these drawings, the outer cover material 4 is a laminated bag having a barrier property, and two sheet members having the same shape in plan view are overlapped, and the outer peripheral portion (end portion) of the sheet member is heated. It is formed by sealing, and an ear portion 6 is formed on the outer periphery of the outer covering material 4 as an excessive portion where the sheet member is joined by the heat seal. This ear | edge part 6 becomes a blank which does not function as the vacuum heat insulation panel 1. FIG.

  In the present embodiment, as shown in FIG. 31, the core material 2 is placed inside the jacket material 4 and vacuum-sealed, and then the cover 45 is covered so as to wrap the ear portion 6 that is the outer peripheral portion of the jacket material 4. . The cover 45 is made of a member such as a resin sheet having flexibility similar to the jacket material 4 and preferably having a lower thermal conductivity than the jacket material 4. As shown in FIG. 32, after the cover 45 is put on the ear portion 6, the cover 45 and the ear portion 6 are folded back integrally along the surface of the outer covering material 4 (the arrow shown in FIG. 32 is the folding direction).

  FIG. 33 shows the vacuum heat insulation panel 1 in a completed state after folding. On the other hand, FIG. 34 shows a conventional vacuum heat insulation panel 1 in which the ear portion 6 is folded without attaching the cover 45. Conventionally, since the folded ear portion 6 as the outer peripheral portion is in direct contact with the surface of the jacket material 4, when the vacuum heat insulation panel 1 is attached to a product such as a refrigerator in this state, it is indicated by an arrow in FIG. As described above, the outer cover 4 generates a so-called heat bridge that conducts heat from the ear portion 6 to the opposite surface along the surface, and the heat insulation performance of the vacuum heat insulating panel 1 as a whole is deteriorated.

  On the other hand, in the vacuum heat insulating panel 1 shown in FIG. 33, when the ear portion 6 is folded, the cover 45 having a lower thermal conductivity than the ear portion 6 is in direct contact with the surface of the outer jacket material 4. The heat on the surface is blocked by the cover 45 as a heat insulating material, and is not conducted to the opposite surface. Therefore, there exists an effect which reduces the deterioration of the heat insulation performance as the vacuum insulation panel 1 whole.

  As described above, the vacuum heat insulation panel 1 as a heat insulator in the present embodiment is configured by wrapping the core material 2 in the bag-like outer covering material 4 and bends the ear portion 6 which is the outer peripheral portion of the outer covering material 4. In particular, a cover 45 that wraps around the ear portion 6 is provided, and the ear portion 6 and the cover 45 of the jacket material 4 are integrally bent at the proximal end of the ear portion 6.

  In this case, even if the ear portion 6 as the outer peripheral portion that becomes the margin of the jacket material 4 is folded back, the cover 45 attached to the ear portion 6 serves as a heat insulating material to reduce the heat conduction on the surface of the jacket material 4. . Therefore, the effect of not deteriorating the heat insulation performance of the vacuum insulation panel 1 as a whole can be obtained by reducing the heat bridge on the surface of the jacket material 4.

  The cover 45 presented in the present embodiment can also be applied to the vacuum heat insulating panel 1 ′ provided with the double jacket material 4, 4 ′ in each embodiment described above. In this case, if the cover 45 is attached to the ear portion 6 ′ of the outer covering material 4 ′, the heat conduction on the surface of the covering material 4 ′ is also reduced, and the heat insulating performance of the vacuum heat insulating panel 1 ′ as a whole. Can be made not to worsen.

  FIGS. 35-38 has shown in order the manufacturing process of the vacuum heat insulation panel 1 as a heat insulating body in a present Example. In common with these drawings, the core material 2 has a structure in which, for example, a plurality of substantially plate-like fiber assemblies are laminated, and the adsorbent 3 embedded in the core material 2 is formed in a bag-like shape having a gas barrier property. The outer cover material 4 is sealed, and the inside of the outer cover material 4 is evacuated to obtain the vacuum heat insulating panel 1. In order to improve the shape of the vacuum insulation panel 1 after the inside of the jacket material 4 is vacuum-sealed and to improve the attachment of the product to a refrigerator or the like, the jacket as described in Example 8 is used. There is a need for “ear folding” in which the material 4 is folded along the end surface of the core material 2. The present embodiment proposes a method that can reduce this “ear folding” operation.

  For comparison, an example of a conventional “ear folding” operation will be described with reference to FIGS. Conventionally, as shown in FIG. 39, first, the core material 2 having a substantially rectangular shape in plan view is placed from the remaining one opening 36 in the outer cover material 4 in which the ear portion 6 is sealed in three directions. insert. Next, as shown in FIG. 40, the core material 2 is disposed so as to be positioned at the center of the jacket material 4, and the opening 36 of the jacket material 4 is sealed while evacuating the inside of the jacket material 4. Then, the vacuum heat insulation panel 1 whose inside is evacuated is obtained. In this case, as shown in FIG. 41, the four sides of the jacket material 4 are sealed to form the ear portion 6, and the core material 2 is arranged at the center of the jacket material 4, so that the core material 2 In the four sides, a fin portion 16 is formed in which the end surface of the jacket material 4 protrudes from the end surface of the core material 2. Thereafter, as shown in FIG. 42, “ear folds” are performed on the four sides of the core material 2 to fold the fin portions 16, which are protruding portions of the jacket material 4, along the end surface of the core material 2. Tape attachment is performed in which the surface of the outer cover material 4 serving as a flat portion of the vacuum heat insulating panel 1 and the end surface of the folded outer cover material 4 are stopped with an adhesive tape 48.

  During the above-described “ear folding” operation, stress is applied every time the outer cover material 4 is bent. Therefore, the outer cover material 4 is damaged, and cracks are particularly generated at the portions in contact with the corners (corner portions) of the core material 2. It will be generated. In addition, “ear folding” must be performed on the four sides of the core material 2, and there are many opportunities to damage the jacket material 4, and the work time including the subsequent tape application is extra.

  As a countermeasure, in this embodiment, as shown in FIG. 35, first, a sheet body having a gas barrier property is bent to form one side as a bent portion 49 and sealed to another side orthogonal to the bent portion 49. 36. As shown in FIG. 36, an outer cover material 4 comprising a pair of sheet members 4A and 4B, each of which forms an ear portion 6 serving as a stop portion, and which forms a pair of the ear portion 6 at a single location, is used. The core material 2 is arranged so that the corner of the core material 2 is brought close to the corner portion 50 of the jacket material 4 formed by the bent portion 49 and the ear portion 6 instead of at the center of the core 4.

  Next, one of the two sides of the outer cover material 4 that is open is sealed to form the ear portion 6, and the inside of the bag-shaped outer cover material 4 is vacuumed from the remaining opening. The opening is sealed under reduced pressure. FIG. 37 shows the state at this time, and the ear portion 6 is formed on three sides of the jacket material 4 excluding the bent portion 49, and the corner portion 50 of the jacket material 4 has corners of the core material 2. Since the core material 2 is arranged so as to be close to each other, the end surface from which the outer cover material 4 protrudes from the end surface of the core material 2 has two sides, and a fin portion 16 is formed on each of the two sides.

  Thereafter, as shown in FIG. 38, with respect to the two sides of the core member 2, the “ear fold” is performed to bend the fin portion 16, which is a protruding portion of the outer cover member 4, along the end surface of the core member 2. Next, the surface of the outer cover material 4 to be a flat portion of the vacuum heat insulating panel 1 and the end surface of the folded outer cover material 4 are taped to stop with an adhesive tape 48. As described above, in this embodiment, the structure of the outer cover material 4 is reduced in the number of times of folding, and the “ear folding” operation can be completed only twice, so that the chance of damage due to the bending of the outer cover material 4 can be reduced. It is possible to reduce cracks and the like at locations in contact with the corners of the core material 2. Further, since the number of times of folding the jacket material 4 is reduced, the time required for the bending is reduced, and the number of man-hours can be reduced including subsequent tape application.

  As described above, in the present embodiment, the core material 2 having a structure in which substantially plate-like fiber assemblies are laminated, and the absorbent 3 as a getter agent that is installed in the embedded portion of the core material 2 and placed in the packaging material, Is sealed with a jacket material 4 having gas barrier properties, and in the vacuum thermal insulation panel 1 as a thermal insulator in which the inside of the jacket material 4 is evacuated, after the inside of the jacket material 4 is vacuum-sealed, at least One or more sides of the core material 2 are arranged with the end faces aligned so that there is no remarkable protrusion from the core material 2 to the jacket material 4.

  In this case, since at least the end surface of the core material 2 and the end surface of the jacket material 4 are aligned, the ear folds that fold the jacket material 4 along the end surface of the core material 2 are not formed. The mounting property can be improved and the appearance as a product can be improved.

  In the present embodiment, a bent portion 49 is formed at least on one side of the sheet-like outer covering material 4 in order to align the end surfaces of the core material 2 and the outer covering material 4.

  In this case, since one side of the jacket material 4 in which the bent portion 49 is formed is not formed with an ear fold portion, the attachment of the product to a refrigerator or the like can be improved, and the appearance as a product can be improved. it can.

  Moreover, the jacket material 4 of the present embodiment has a structure in which at least one side is not sealed. In this case, by aligning the end surface 4 of the core material 2 with the unsealed bent portion 49 of the jacket material 4, the structure of the jacket material 4 can be reduced, and the jacket material 4 can be bent. It is possible to reduce the chances of damage caused by the above, and to reduce cracks and the like at the portions in contact with the corners of the core material 2.

  43 to 45 show the configuration of the vacuum heat insulation panel 51 as a heat insulator in the present embodiment. FIG. 43 shows the vacuum heat insulating portion 52 that constitutes the vacuum heat insulating panel 51 shown in FIGS. 44 and 45. This is actually the same as the vacuum heat insulating panel 1 shown in the above embodiment. That is, a plurality of sheet bodies 2A, 2B, and 2C, which are papermaking type glass wool sheets, are laminated to form the core material 2, and the adsorbent 3 is disposed in the embedded portion 28 of the core material 2 so that the core including the adsorbent 3 is disposed. After the material 2 is wrapped with the outer covering material 4 and the inside of the outer covering material 4 is decompressed, the opening of the outer covering material 4 is sealed, so that the vacuum insulation portion is sealed and wrapped around the entire periphery of the core material 2 52 is obtained. Since the papermaking type glass wool sheet used as the core material 2 is manufactured in a sheet shape, when laminating, sheet bodies 2A, 2B, and 2C cut into arbitrary dimensions are sequentially stacked to obtain a predetermined number. It is inserted into the jacket material 4.

  A vacuum heat insulation panel 51 shown in FIG. 44 forms a plurality of spaces 55 by forming a seal portion 54 at an appropriate position on the outer cover material 4 in which two sheet members 4A and 4B having the same shape in plan view are overlapped. Then, the core material 2 including the adsorbent (not shown) shown in FIG. 43 is inserted into each space 55, and each space 55 is sealed under reduced pressure. As a result, the vacuum heat insulation panel 51 which connected the some vacuum heat insulation part 52 in series can be obtained.

  Also, another vacuum heat insulation panel 51 shown in FIG. 45 is formed by covering the three sheet members 4A, 4B, 4C having the same shape in plan view, and forming the seal portion 56 at the end portion thereof. A space 55 is defined between the sheet members 4A and 4B and between the sheet members 4B and 4C, and the core material 2 including the adsorbent (not shown) shown in FIG. Then, each space 55 is sealed under reduced pressure. As a result, the vacuum heat insulation panel 51 which connected the some vacuum heat insulation part 52 in parallel can be obtained.

  The vacuum heat insulation panel 51 shown in each of these figures forms a plurality of independent spaces 55 by the jacket material 4, multi-chambers the inside of the jacket material 4, and inserts the core material 2 into each space 55. Since the vacuum sealing is performed, even if a defect occurs in a part of the vacuum heat insulation panel 51 and the vacuum degree of a part of the space 55 is lost, the vacuum degree of the remaining space 55 is maintained. Can do. Therefore, the vacuum insulation panel 51 as a whole can retain the insulation function.

  As described above, the vacuum heat insulation panel 51 in the present embodiment is composed of a set of outer cover materials 4 and a plurality of sets of core members 2 as shown in FIGS. The core members 2 are individually placed in the plurality of spaces 55, and each of the core members 2 is independently held under reduced pressure.

  In the past, a set of core materials was used for a set of jacket materials to form a vacuum heat insulation panel, but this caused defects such as pinholes that could break vacuum anywhere in the jacket material. When generated, the function of the entire vacuum insulation panel is lost.

  On the other hand, in the vacuum heat insulation panel 51 of the present embodiment, the core material 2 is individually placed in the plurality of spaces 55 formed by the jacket material 4, and each core material 2 is independently held under reduced pressure. Therefore, even if a defect occurs in a part of the vacuum heat insulation panel 51, the heat insulation function can be maintained as a whole of the vacuum heat insulation panel 51.

  FIG. 46 shows a configuration of the vacuum heat insulation panel 1 as a heat insulator in the present embodiment. As described above, the vacuum heat insulation panel 1 uses a thin glass wool sheet made of inorganic fibers stacked in a plurality of layers as a core material 2 and wraps the core material 2 with a jacket material 4 that inhibits the permeation of gas and water vapor. It is obtained by vacuum-sealing the inside of 4.

  The jacket material 4 is formed by superposing two sheet members 4A and 4B having the same shape in plan view and heat-sealing the outer peripheral portions (end portions) of the sheet members 4A and 4B. In a state in which the core material 2 is hermetically sealed, a fin portion 16 composed only of the outer cover material 4 not including the core material 2 is formed from the outer peripheral end portion of the core material 2 to the outer peripheral end portion of the outer cover material 4. In particular, in this embodiment, after the core material 2 is wrapped with the jacket material 4 and the fin portion 16 is folded back, the sealing device 40 using the upper and lower heaters shown in the seventh embodiment is used in a state where the inside of the jacket material 4 is decompressed. Using, the seal part 58 to which the sheet members 4 </ b> A and 4 </ b> B are thermally welded is formed at two places above and below the folded fin part 16. The seal portion 58 corresponds to the above-described ear portions 6 and 6 '.

  As a comparison, FIG. 47 shows a main configuration of a conventional vacuum heat insulation panel 1. Conventionally, after the core material 2 is wrapped with the jacket material 4 and the inside of the jacket material 4 is forcibly decompressed, the opening of the jacket material is sealed, and the entire periphery is kept sealed. The heat insulation panel 1 was manufactured. In this case, the fin portion 16 of the outer cover material 4 is sealed by the sealing device 40 without being folded back. That is, there is only one seal portion 58 in the opening of the jacket material 4, and long-term reliability is reduced due to intrusion of the inhibitor gas from the seal portion 58.

  On the other hand, the vacuum heat insulation panel 1 of the present embodiment uses a sheet or board made of a plurality of laminated inorganic fibers as a core material 2 and wraps the core material 2 with a jacket material 4 that inhibits the permeation of gas and water vapor. After folding the fin portion 16 of the jacket material 4, the inside of the jacket material 4 is depressurized, and finally, two or more seal portions 58 are provided vertically on the fin portion 16, so that the end of the jacket material 4 is It is the structure which seals a part.

  In this case, by folding back the fin portion 16 of the jacket material 4 and providing the seal portion 58 at two or more places above and below the fin portion 16, it is less likely to enter the inhibitory gas from the seal portion 58 than in the past, It becomes possible to provide the vacuum heat insulation panel 1 which has the outstanding long-term reliability.

  In the present embodiment, it is preferable that the folded upper and lower seal portions 58 are fused. In this case, the individual seal portions 58 not only seal the end portions of the jacket material 4, but also the seal portions 58 are further fused together to seal the end portions of the jacket material 4. The reliable vacuum heat insulation panel 1 can be provided. Further, it is possible to provide the vacuum heat insulating panel 1 that eliminates the need to fold the fin portion 16 and leads to minimization of the fin portion 16.

  Further, in this embodiment, it is preferable that the jacket material 4 is made of a laminate bag having three or more layers, and the surface layer is a fusion layer made of a plastic material. In this way, when the fin portion 16 is folded back, the fusion layer that is the surface layer of the outer cover material 4 faces inward, and the upper and lower seal portions 58 are easily fused together via the fusion layer. It becomes possible.

  Moreover, it is preferable that the width | variety of the seal part 58 used by a present Example is 8 mm or more per location. If each seal part 58 is formed with such a width, it becomes possible to exhibit the effect of this embodiment that the vacuum heat insulation panel 1 having excellent long-term reliability can be provided.

  FIG. 48 shows a completed state of the vacuum heat insulation panel 1 in the present embodiment. In the figure, a vacuum heat insulating panel 1 includes a core material 2 made of a heat insulating material in which fibrous glass wool sheets are laminated, and a moisture adsorbent 3 sealed in a bag shape with a laminated sheet-like film. This is housed in the outer cover material 4 and the inside is kept in vacuum. The adsorbent 3 is made of an inorganic material having water adsorption performance such as calcium oxide, silica gel, and zeolite. The jacket material 4 may be any material as long as it has a gas barrier property and can accommodate the core material 2 and the adsorbent 3 and maintain the inside of the chamber in a vacuum. For example, a plastic film in which a metal such as aluminum is deposited on the surface is used. A laminated bag such as is used. Reference numeral 61 denotes a recess formed on the surface of the vacuum heat insulating panel 1, which corresponds to the groove 35 described above.

  Next, the manufacturing process of the vacuum heat insulating panel 1 will be described in detail with reference to FIGS.

  FIG. 49 is a perspective view of the core material 2 before the core material 2 is accommodated in the jacket material 4 and vacuum-sealed. The core material 2 of the present embodiment is configured by combining a plurality of core portions 2A, 2B, 2C. Each core part 2A, 2B, 2C is obtained by making the base material of the core material 2 into a predetermined dimension using a type | mold and a cutter (not shown). In that case, the part which forms the recessed part 61 is obtained using several core part 2B, 2C thinned and arrange | positioned on the upper surface of 2 A of flat core parts which make the bottom face of the core material 2. FIG. It is preferable to fix the core portions 2B and 2C by threading or the like to the core portion 2A so that the core portions 2B and 2C do not move.

  Further, in order to provide the insertion portion of the adsorbent 3 in the core material 2 at a position where the recess 61 has escaped, a cutting blade 62 is previously placed. After passing through the drying process of the core material 2, as shown in FIG. 50, the core material 2 where the cutting blade 62 is inserted is removed to reduce the thickness, and the adsorbent 3 is inserted there. Then, the adsorbent 3 is prevented from directly hitting the outer covering material 4 by returning an appropriate amount of the removed core material 2 peeled off so as to cover the adsorbent 3.

  FIG. 50 shows a state in which the adsorbent 3 is attached to the core material 2, these are put in a bag-like outer covering material 4, set inside a vacuum sealing device (not shown), The vacuum heat insulation panel 1 obtained by pressure-reducing the inside and vacuum-sealing is shown. The core material 2 with the adsorbent attached is wrapped in another member, for example, a polypropylene sheet, and compressed, and the sheet periphery is heat-sealed to form a molded body and then inserted into the jacket material 4. It may be set inside the vacuum sealing device, and after opening one end of the sheet before decompression, the inside of the jacket material 4 may be decompressed and vacuum sealed (not shown).

  As shown in FIG. 50, the vacuum heat insulating panel 1 is pressed by the atmospheric pressure, and a recess 61 ′ is formed not only on the side where the core material 2 is thinned, but also on the opposite side. It is in a shallower state. The roller 65 shown in FIGS. 51 and 52 is compressed into the recess 61 while rotating in the linear direction, and the depth of the recess 61 is formed to a predetermined dimension, so that the vacuum heat insulation panel 1 in a completed state is obtained.

  FIG. 51 shows a cross section of the vacuum heat insulating panel 1 and includes a rotating roller 65 and a convex portion 66 integrally formed with the roller 65 in order to form the concave portion 61 with a predetermined dimension. Uses a press that does not. By compressing the concave portion 61 from one side by the convex portion 66 of the roller 65, the concave portion 61 'on the opposite side (the other side) of the vacuum heat insulating panel 1 placed on the upper surface of the driven roller 67 becomes substantially flat.

  FIG. 52 shows a state in which the depth of the concave portion 61 is formed to a predetermined dimension on the surface of the concave portion 61 of the vacuum heat insulation panel 1 by using the roller 65 whose gap is adjusted after the inside of the jacket material 4 is vacuum-sealed. Is shown. Specifically, the vacuum heat insulation panel 1 in the state shown in FIG. 50 is conveyed toward the roller 65 while being guided by the feed roller 68. As the roller 65 rotates, the convex portion 66 of the roller 65 compresses the surface of the vacuum thermal insulation panel 1 and gradually forms the concave portion 61 of a predetermined depth linearly, and at the same time, the vacuum pressed against the driven roller 67. On the back surface side of the heat insulating panel 1, the concave portion 61 'which is not necessary originally is corrected and becomes substantially flat, and as a result, only the surface side of the vacuum heat insulating panel 1 has a depth of a predetermined dimension as shown in FIG. The vacuum heat insulation panel 1 in which the recess 61 is formed is obtained.

  As described above, in this embodiment, the core material 2 and the moisture adsorbent 3 are provided, and the jacket material 4 that covers the core material 2 and the adsorbent 3 and is sealed by depressurizing the inside is provided. In the vacuum heat insulating panel 1 in which one or more recesses 61 having a depth and a width are formed, the recesses 61 are thinned in a straight line, inserted into the outer cover material 4 and vacuum-sealed, and then the rollers 65 are linearly moved. It is formed while rotating.

  Conventionally, as a method of grooving a vacuum heat insulation panel, a vacuum heat insulation panel in which the inside of the jacket material is sealed in a vacuum is compressed with a press machine having a convex portion on a die in a post-processing, or a roller An idea has been proposed in which a convex portion is provided on the roller and the roller is compressed while rotating. In any of these methods, since a recess having a predetermined depth is formed by post-processing, the thickness of the vacuum heat insulating panel is reduced. Therefore, in order to obtain a vacuum heat insulation panel having a necessary thickness, it is necessary to increase the thickness of the core material in advance, which increases the amount of the core material used, which increases the cost. In addition, it is necessary to form a recess having a predetermined depth at a time, which damages the jacket material, and the barrier material of the jacket material is broken and the barrier property of the jacket material is reduced. Thermal insulation performance deteriorates.

  Therefore, as in the present embodiment, a plurality of core portions 2B, 2C are disposed on the upper surface of the core portion 2A and the recess 61 is formed in the core material 2 in advance. Due to the atmospheric pressure, the vacuum heat insulation panel 1 is formed with a recess 61 having a certain depth, and the flat vacuum heat insulation panel 1 in which the recess 61 is not formed in advance has a predetermined depth by post-processing. Compared with the case where the recess 61 is formed by compressing with the roller 65, the amount of the core material 2 used can be reduced in order to obtain the vacuum heat insulation panel 1 having the same thickness. Further, since the recess 61 is formed in the core material 2 in advance, the post-processing by the roller 65 requires only a small compressive force on the vacuum heat insulating panel 1, and as a result, the outer surface is formed to form the recess 65 having a predetermined depth. Damage to the workpiece 4 can be reduced.

  In this embodiment, the recess 61 of the vacuum heat insulating panel 1 is compressed to a predetermined depth by a press machine (not shown). In this case as well, the above-described effects can be obtained, and the recess 61 having a predetermined depth can be formed in the vacuum heat insulating panel 1 using a press.

  The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the core material 2 shown in each embodiment may have a shape other than a square in plan view. Further, the features described in each embodiment may be combined with one or more other embodiments.

1 Vacuum insulation panel (insulator, sub-insulator)
1 'Vacuum insulation panel (insulator)
2 Core material 3 Adsorbent 4 Outer material (first outer material)
4 'jacket material (second jacket material)
6,6 'ear (outer periphery)
16, 16 'fin part 18A, 18B, 18C, 18D glass wool sheet (sheet body)
21 adsorbent hole 23 quicklime 24 bag 25 getter agent 26A, 26B, 26C fiber assembly 28 embedded portion 29 cutout portion 30 convex portion 31 cutout portion 35,35 'groove portion 45 cover

Claims (9)

  A plurality of sheet bodies are laminated, an adsorbent hole is provided in the laminated sheet body, a core material in which a plurality of adsorbents connected to the adsorbent hole is disposed is wrapped with a jacket material, and the interior is decompressed and sealed A heat insulator characterized by being formed.   The heat-insulating body according to claim 1, wherein the adsorbent is configured by sealing quicklime in a bag. A core material formed by laminating a plurality of plate-like fiber assemblies and a getter agent installed in the embedded portion of the core material are placed in a jacket material having a gas barrier property, and the interior is vacuumed and sealed. In the insulation,
A heat insulator, wherein a space in which a convex portion due to the thickness of the getter agent is not formed on the surface after the outer cover material is vacuum-sealed is provided in the embedded portion of the core material.   The heat insulator according to claim 3, wherein the embedded portion of the core material is provided with the space in accordance with a rate of change in thickness of the core material before and after vacuum-sealing the jacket material.   The embedded portion of the core material has the space provided by a cutout portion, a concave cutout portion provided in the fiber assembly, or a combination of the cutout portion and the cutout portion. Or the heat insulating body of 4.   A core material is put in a jacket material having a barrier property, a groove is formed in a sub-heat insulating body whose inside is vacuum-sealed, and the sub-heat insulating material is further put in a jacket material having a barrier property and vacuum-sealed. A heat insulator characterized by having.   It has a configuration in which a groove is formed after a core material is put in a jacket material having a barrier property, and a sub-heat insulator whose inside is vacuum-sealed is further put in a jacket material having a barrier property and vacuum-sealed. Characteristic insulation. After wrapping the core material with the first jacket material, sealing the interior with reduced pressure, and further wrapping with the second jacket material, reducing the interior and sealing,
A heat insulating body characterized in that the fins of the first jacket material and the second jacket material are simultaneously folded and attached with a tape.   A heat insulator that is formed by wrapping a core material in a bag-like outer cover material, and is formed by bending an outer peripheral portion of the outer cover material, comprising a cover that surrounds the outer peripheral portion, and the outer peripheral portion and the cover A heat insulator characterized in that it is integrally bent.

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