JP7108945B2 - Vacuum insulation material and insulation box body using the same - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a vacuum insulation material and an insulation box body using the same.

In general, a vacuum heat insulating material is constructed by vacuum-sealing a core material such as glass wool in a gas barrier covering material. Vacuum insulation materials are used as insulation boxes for refrigerators, vending machines, and the like, insulation panels for house walls, and the like, and greatly contribute to the improvement of energy saving.

The core material of the vacuum insulation material is obtained by cutting a sheet-like material such as glass wool into a desired size. The cut out core material is inserted into the jacket material together with the adsorbent, and sealed under reduced pressure. A vacuum heat insulating material is thus constructed. At this time, offcuts other than the core material are generated from the sheet material. Since this remnant material is discarded, the cost increases accordingly. Therefore, it has been proposed to reuse the offcut material as a core material (see Patent Document 1, for example).

16A to 16D are diagrams showing the vacuum heat insulating material described in Patent Document 1. FIG.

As shown in FIG. 16A, the vacuum heat insulating material 100 is constructed by inserting a core material 102 such as glass wool into a gas barrier covering material 101 together with an adsorbent 103 and sealing under reduced pressure.

As shown in FIG. 16B, the core material 102 is obtained by cutting a sheet material 104 such as glass wool into a desired size. The edge material 105 of the core material 102 is peeled off in two in the thickness direction.

The offcuts 105 are arranged horizontally to form aggregates 105a, which are sandwiched between new core materials 106, as shown in FIG. 16C. This completes the core material 102 shown in FIG. 16D.

As a result, the offcuts 105 can be used effectively without being wasted.

JP 2005-345025 A

An object of the present disclosure is to provide a vacuum heat insulating material that uses a core material that has a low production cost, a large cost reduction rate, is inexpensive, and has high dimensional accuracy and rigidity.

The vacuum heat insulating material of the present disclosure includes: an outer covering material having gas barrier properties ; and a second core member having an engaged portion that engages with the portion .

As a result, the plurality of offcuts arranged side by side in the horizontal direction are integrated into a sheet. As a result, the core material can be easily inserted into the outer covering material, and the core material can be formed only from the offcuts without the need to sandwich the new core material in order to form a sheet. The individual pieces of end material forming the core material are not displaced due to the engagement between the engaging portion and the engaged portion provided on the butting surfaces thereof. Due to the engagement between the engaging portion and the engaged portion, the abutment surface of the scrap material is formed into a shape in which the engaging portion and the engaged portion are mixed in unevenness, thereby reducing the rigidity of the abutting surface portion of the scrap material. can be secured.

According to the present disclosure, it is possible to configure a core material with high dimensional accuracy only from offcuts, and provide a vacuum insulation material with low production costs, a large cost reduction rate, and high dimensional accuracy and rigidity. be able to.

FIG. 1 is a cross-sectional view of a vacuum heat insulating material according to the first embodiment of the present disclosure. FIG. 2 is a perspective view showing a cutting state of a sheet-like material that serves as a core material of the vacuum heat insulating material. FIG. 3 is an exploded perspective view showing a core material of the vacuum heat insulating material. FIG. 4 is a perspective view showing a core material of the vacuum heat insulating material. FIG. 5 is an exploded perspective view showing a core material using scrap material in the second embodiment of the present disclosure. FIG. 6 is a perspective view of the concentric material. FIG. 7 is an exploded perspective view showing a core material using scrap material in the third embodiment of the present disclosure. FIG. 8 is a perspective view of a core material of the same vacuum heat insulating material. FIG. 9 is an exploded perspective view showing a core material using scrap material in the fourth embodiment of the present disclosure. FIG. 10 is a perspective view of a core material of the vacuum heat insulating material. FIG. 11 is an exploded perspective view showing a core material using offcuts according to the fifth embodiment of the present disclosure. FIG. 12 is a perspective view of a core material of the vacuum heat insulating material. FIG. 13 is an exploded perspective view showing a core material using offcuts according to the sixth embodiment of the present disclosure. FIG. 14 is a perspective view of a core material of the vacuum heat insulating material. FIG. 15 is a perspective view of a heat insulating box according to the seventh embodiment of the present disclosure; FIG. 16A is a cross-sectional view of the vacuum heat insulating material described in Patent Document 1. FIG. FIG. 16B is a perspective view showing the configuration of the offcut core material in the vacuum heat insulating material described in Patent Document 1. FIG. FIG. 16C is a perspective view showing the configuration of the offcut core material in the vacuum heat insulating material described in Patent Document 1. FIG. FIG. 16D is a perspective view showing the configuration of the offcut core material in the vacuum heat insulating material described in Patent Document 1. FIG.

(Knowledge underlying the present disclosure)
According to the conventional vacuum heat insulating material 100 described above, it is necessary to form the core material 102 by sandwiching the aggregate 105a (hereinafter referred to as an aggregate of scrap materials) in which the scrap materials 105 are arranged between the new core materials 106. . At this time, it is necessary to separate the offcuts 105 in two, or arrange the offcuts 105 between the new core materials 106 and sandwich them as an offcuts aggregate 105a. Therefore, there is a problem that the workability is poor and the production cost is increased accordingly.

Moreover, the scrap material assembly 105a cannot function as a core material with the scrap material 105 alone. Therefore, it must be sandwiched between the new core materials 106 . In other words, in order to make the offcuts 105 function as a core material, a new core material 106 is required separately. Therefore, it is not possible to increase the cost reduction rate by using offcuts.

Also, in order to increase the cost reduction rate, if the core material is composed only of the scrap material assembly 105a without using the new core material 106, a plurality of scrap materials 105 are individually inserted into the outer covering material 101. There is a need. In this case, the workability is further deteriorated, and furthermore, the left pieces 105 arranged in the horizontal direction are displaced in the longitudinal direction, the dimensional accuracy is deteriorated, and the rigidity at the abutting surface portion of the left pieces 105 is reduced. will decline.

As described above, the conventional core material using offcuts, in other words, the vacuum insulation material using offcuts has a high production cost, a low cost reduction rate, and low dimensional accuracy and rigidity. There is a problem that

The inventors have made the present disclosure in view of these findings.

(An example of an aspect of an embodiment of the present disclosure)
A first aspect of the present disclosure is a vacuum heat insulating material comprising a jacket material having gas barrier properties and a core material vacuum-sealed inside the jacket material. The core material is configured by arranging a first edge material and a second edge material side by side in one direction. An engaging portion is provided on the butting surface of the first scrap. An engaged portion is provided on the abutment surface of the second end material. The engaging portion and the engaged portion are engaged with each other, and the first end material and the second end material are connected.

As a result, a plurality of offcuts arranged side by side in one direction, for example, the horizontal direction, are integrated into a sheet, which can be easily inserted into the outer covering material. It is not necessary to insert a new core material to form a sheet, and the core material can be composed only of offcuts. Then, each end material constituting the core material is engaged with the engaging portion provided on the abutment surface of the first end material and the engaged portion provided on the abutment surface of the second end material. This eliminates positional deviation. Moreover, due to the engagement between the engaging portion and the engaged portion, the abutment surface of the scrap material is formed into a shape in which the engaging portion and the engaged portion are mixed in unevenness, and the rigidity of the abutting surface portion of the scrap material is improved. can be ensured.

Here, the first offcuts refer to arbitrary offcuts among the plurality of offcuts, and the second offcuts are the first offcuts different from the first offcuts of the plurality of offcuts. It refers to the end material facing the end surface of the end material of 1.

Here, the engaging portion is parallel to the heat insulating surface and suppresses movement in the insertion direction between the plurality of end materials when inserting the core material into the outer covering material. .

More specifically, the engaging portion has a shape corresponding to that of the engaged portion, and the shape thereof is not limited to a linear shape only, and may be a curved shape only. , a configuration in which a linear shape and a curved shape are mixed may be used.

According to another aspect of the present disclosure, the engaging portion and the engaged portion may each have a hook shape that prevents disengagement.

As a result, it is possible to prevent the plurality of offcuts from coming loose due to careless disengagement between the engaging portion and the engaged portion. Therefore, it is possible to ensure that the operation of inserting the core material into the outer covering material is facilitated. In addition, the gap between the engaging portion and the engaged portion can be reduced, and deterioration of the heat insulation performance caused by the gap between the core members can be suppressed.

Another aspect of the present disclosure may further include a configuration in which a cut is provided in a corner portion of at least one of the engaging portion and the engaged portion.

This allows the engaging portion to move freely to some extent during engagement. Therefore, even if the dimensions of the engaging portion and the engaged portion are slightly different, the notches provided in at least one of the engaging portion and the engaged portion can deform the shape of the engaging portion and engage them. . Therefore, it is possible to prevent poor engagement between the engaging portion and the engaged portion, thereby increasing the yield and reducing the cost.

Further, for example, if the engaging portion is formed slightly larger than the engaged portion in advance, the engagement state between the engaging portion and the engaged portion can be made tight and strong. can. Therefore, the rigidity of the abutting surface portions of the plurality of offcuts can be made stronger. In addition, it is possible to reduce the gap between the core materials and suppress the deterioration of the heat insulation performance caused by the gap between the core materials.

Note that the notch is a cutting line for dividing the offcuts perpendicularly to the heat insulating surface.

Another aspect of the present disclosure may be a configuration in which a portion or the entirety of the abutment surface portions of the first scrap and the second scrap is subjected to compression processing in the thickness direction.

As a result, the rigidity of the abutting surface portion of the end material can be made stronger, and the compressed portion can be used as a recess for installing a refrigerant pipe, for example. Further, as a result, it is possible to reduce irregularities (steps) in the direction parallel to the adiabatic surface, which occur in the abutment portion, and to improve the appearance quality.

Here, the term "compression working" refers to, for example, pressing in a direction perpendicular to the heat insulating surface after sealing the core material under reduced pressure.

Here, the press work includes, for example, "mechanical press work" in which a mold is pressed against and compressed using air pressure or hydraulic pressure, and a cylindrical metal mold is used to transfer the It includes "roll press processing" that performs compression processing.

Another aspect of the present disclosure is an insulating box with the vacuum insulation described above.

According to this, it is possible to realize a low-cost, high-quality heat insulating box by making use of the effect of the vacuum heat insulating material described above.

Embodiments of the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited by these embodiments. Further, in each drawing, the same reference numerals are used for the same components, and the description thereof is omitted.

(First embodiment)
FIG. 1 is a cross-sectional view of a vacuum heat insulating material 1 according to the first embodiment of the present disclosure. A vacuum heat insulating material 1 of this embodiment includes a core material 2 , a covering material 3 , and an adsorbent 4 . The core material 2 and the adsorbent 4 are sealed inside the jacket material 3 in a decompressed and sealed state (substantially vacuum state).

The jacket material 3 is a bag-shaped member having gas barrier properties. In the present embodiment, the outer covering material 3 is configured in a bag shape by placing two laminated sheets 3a facing each other and sealing the periphery thereof with a sealing portion 5 .

Further, the sealing portion 5 does not have the core material 2 inside, and is configured such that the laminated sheets 3a are in contact with each other. The sealing portion 5 is formed in a fin shape extending from the main body of the vacuum heat insulating material 1 toward the outer periphery.

The core material 2 is a fibrous member, and as shown in FIG. 2, is constructed by cutting a sheet-like material 6 into a predetermined size. Further, in the present embodiment, in addition to the new core material 21 formed by cutting directly from the sheet-like material 6 at the time of cutting, as a core material, the offcut material 7 generated during cutting is used. A core material 22 (refer to FIG. 4, hereinafter simply referred to as a core material) is formed using At this time, the core material 2 may include only the edge material core material 22, or may have a structure including the new core material 21 and the edge material core material 22 in order to increase the size. In this case, the new core material 21 and the remnant core material 22 are engaged with each other by the engaging portion and the engaged portion.

In the example described later, an example using two offcut cores 22 will be described, but the present disclosure is not limited to this, and a configuration in which a plurality of offcut cores 22 of three or more are engaged. may

The sheet material 6 is formed, for example, by firing glass fibers produced by a centrifugal method and having an average fiber diameter of 3 μm and compressing them to a bulk density in the range of 120 kg/m 3 to 200 kg/m 3 . As shown in FIG. 3, there are a plurality of offcuts 7 cut out by cutting the sheet material 6. In this example, two offcuts 7 (one is the first offcut and the other is the second offcut). ) are butted against each other and arranged side by side in the horizontal direction to form a sheet-like offcut core material 22 .

That is, the end materials 7, 7 cut out from the sheet-shaped material 6 have a fitting structure in which the abutment surfaces 8, 8 are formed with a convex portion 9 serving as an engaging portion and a concave portion 10 serving as an engaged portion. A portion 11 is integrally formed. As an example, the first end material is provided with an engaging portion, and the second end material is provided with an engaged portion. By fitting the convex portion 9 and the concave portion 10, the offcuts 7, 7 are engaged to form a sheet, and the offcut core material 22 is formed.

As described above, the core material 22 formed into a sheet shape is inserted into the jacket material 3 together with the adsorbent 4 and sealed under reduced pressure. Thus, the vacuum heat insulating material 1 is constructed.

Note that the notch 12 in FIG. 3 is a notch provided in the corner portion 17 of the concave portion 10 which is one side of the fitting structure portion 11 . Two cuts 12 are provided in each corner portion 17 . These cuts 12 are formed on extension lines of the sides forming the recess 10 . However, the present disclosure is not limited to this, and the incision 12 may be formed from the vertex of the corner portion 17 in an oblique direction with respect to each side, as indicated by the dashed line.

Also, in this specification, an example in which there are two of the plurality of offcuts 7 , 7 is shown, but a larger number of offcuts may be connected to form the offcut core material 22 .

Next, the operation and effects of the offcut core material 22 configured as described above will be described below.

The edge material core material 22 of the vacuum heat insulating material 1 is formed by arranging a plurality of edge materials 7, 7 cut out from the sheet-like material 6 side by side in the horizontal direction, and forming protrusions on the butting surfaces 8, 8 thereof. It is formed by fitting 9 and recess 10 together. By this fitting, the plurality of offcuts 7, 7 are integrated into a sheet.

As a result, it is not necessary to sandwich a plurality of leftover materials 7, 7 arranged in the horizontal direction with new core materials, and the leftover materials 7, 7 can be used to form the core material 22 of the leftover materials. That is, there is no need to use a new core material, and the cost reduction rate can be increased by using offcuts.

In addition, the core material 22 of the end material is integrated into a sheet shape, and the fitting between the convex portion 9 and the concave portion 10 of the fitting structure portion 11 causes positional deviation (in the direction of the arrow a in FIG. 4 (plan view). No positional deviation) in the extending direction) of the butting surface 8 in . Therefore, it becomes easy to insert into the jacket material 3 in the direction indicated by the white arrow b (one of the directions indicated by the arrow a in FIG. 4). Therefore, the production cost, which increases when the core material 22 is formed from the offcuts 7, 7 only, can be greatly reduced.

Moreover, since the projection 9 and the recess 10 of the fitting structure 11 are not displaced due to the fitting, the outer dimensions of the remnants 7, 7 alone are used to form the remnants core 22. Accuracy can be increased.

Further, in the end material core material 22, the protrusions 9 and the recesses 10 are fitted to each other in an uneven manner on the abutting surfaces 8, 8 of the end materials 7, 7. As shown in FIG. Therefore, the rigidity of the butted portion can be increased. If the abutting surfaces of the offcuts 7 and 7 are in a straight state, they are likely to be bent by an external force in the direction of the arrow c in FIG. 4 (thickness direction of the offcuts 7). Since the convex portions 9 and the concave portions 10 are mixed, the rigidity against the external force in the direction of the arrow c is increased.

Further, the rigidity of the abutting surfaces 8, 8 of the offcuts 7, 7 can be increased by applying a concave compression process d as indicated by the dashed line in FIG. This concave compression work d is applied to the fitting structure portion 11 where the convex portion 9 and the concave portion 10 are fitted, that is, the abutting surfaces 8, 8 of the end materials 7, 7, and the flat surfaces of the end materials 7, 7. The edge members 7, 7 may be formed by pressing them against the abutting surfaces 8, 8 in a substantially vertical direction so as to dent the portions. As a result, the reliability of the vacuum heat insulating material 1 can be further improved. Moreover, unevenness (step) parallel to the adiabatic surfaces of the abutting surfaces 8, 8 can be prevented. It is also possible to effectively use the recesses formed by the compression process d as recesses for installation of refrigerant pipes.

In addition, the compression process d may be provided not on the entire area of the abutment surfaces 8, 8 of the offcuts 7, 7 but on a part thereof.

As described above, even with the offcut core material 22 composed only of the offcuts 7, 7, it is possible to realize a core material that maintains substantially the same quality as the new core material 21, and the offcuts can be used. A significant cost reduction can be achieved by

In addition, in the present embodiment, a notch 12 is provided in the corner portion of the concave portion 10 of the fitting structure portion 11 . As a result, even if the shape of the projection 9 is slightly larger than that of the recess 10 , the notch 12 widens the recess 10 so that the projection 9 can be fitted into the recess 10 . Therefore, even if there is some dimensional error between the shape of the convex portion 9 and the shape of the concave portion 10, it can be used as a core material, and the fitting failure between the convex portion 9 and the concave portion 10 can be prevented. That is, the yield can be increased and the cost can be reduced. In addition, by forming the projection 9 slightly larger than the recess 10 in advance, the fitting state between the projection 9 and the recess 10 can be made close and strong. Thereby, the rigidity of the abutting surfaces 8, 8 of the scraps 7, 7 can be made stronger.

It is preferable that the length of the cut 12 in plan view is at least 1/10 or more of the length of each side forming the recess 10 (the side extending from the cut 12). If the width is less than 1/10, the expansion of the concave portion 10 is insufficient, and a fitting failure of the convex portion 9 may occur. Moreover, it is preferable that the length dimension of the cut 12 is set to 1/6 or less of the long side dimension of the scraps 7,7. If it is larger than 1/6, the workability is deteriorated.

In the present embodiment, an example in which cuts 12 are provided in both convex portion 9 and concave portion 10 is shown, but cuts 12 may be provided in at least one of them.

(Second embodiment)
FIG. 5 is an exploded perspective view showing a core member 22 using the scrap material 7 in the second embodiment, and FIG. 6 is a perspective view of the same core material.

In the present embodiment, the projection 9 and the recess 10 of the fitting structure 11 are provided with a hooking shape portion 13 to prevent disengagement in the direction of arrow e (the direction in which the ends 7 and 7 are separated from each other). It is Here, the catch shape is a shape that, when a force is applied to the offcuts 7, 7 in a direction to separate them, generates a force that resists the force and prevents the offcuts 7, 7 from separating. Say things.

With such a configuration, the off-piece core material 22 of the present embodiment can prevent the off-pieces 7, 7 from being displaced in the direction of the arrow e, and the dimensional accuracy can be further improved.

Further, the above-described hook-shaped portion 13 may be, for example, substantially L-shaped, but as shown in the figure, it should have a shape having a taper 14 in the direction in which the fitting between the convex portion 9 and the concave portion 10 bites. is preferred. With such a configuration, when the convex portion 9 and the concave portion 10 are fitted together, the abutting surfaces 8, 8 of the offcuts 7, 7 are pressed against each other by the component force generated by the taper 14. FIG. Therefore, it is possible to prevent the occurrence of a gap between the butting surfaces 8,8. As a result, it is possible to effectively prevent the deterioration of the heat insulating property of the portion due to the formation of a gap between the abutment surfaces 8, 8 of the scraps 7, 7.

Also in this embodiment, the same cut 12 as in the first embodiment is provided. Thereby, the fitting between the convex portion 9 and the concave portion 10 can be made more reliable.

(Third Embodiment)
FIG. 7 is an exploded perspective view showing a core material using offcuts 7 in the third embodiment of the present disclosure, and FIG. 8 is a perspective view of the same core material.

In the present embodiment, the hooking shape portions 13 of the fitting structure portion 11 described in the second embodiment are provided on both sides of each of the convex portion 9 and the concave portion 10 (both sides in the direction a in plan view). is.

As a result, the force component of the taper 14 can enhance the effect that the abutment surfaces 8, 8 of the offcuts 7, 7 are in pressure contact with each other, and the effect of preventing the deterioration of the abutment surfaces 8, 8 of the offcuts 7, 7. can be further improved.

(Fourth embodiment)
FIG. 9 is an exploded perspective view showing a core material using the scrap material 7 in the fourth embodiment of the present disclosure, and FIG. 10 is a perspective view of the same core material.

In the present embodiment, the projection 9 and the recess 10 that serve as the fitting structure 11 are provided at a plurality of locations on the butt faces 8, 8 instead of at one location.

According to the configuration of the present embodiment, the mixed area (contact area) between the convex portion 9 and the concave portion 10 on the butting surfaces 8, 8 of the offcuts 7, 7 is increased, and the rigidity of the butting portion is increased. can be

The numbers of the protrusions 9 and the recesses 10 are not particularly limited, but may be about one or two. In one case, it is most preferable from the viewpoint of improving the rigidity to provide the protrusions 9 and the recesses 10 of the edge members 7, 7 at approximately the center of the sides in a plan view. Moreover, in the two cases, it is preferable from the viewpoint of improving the rigidity that the projections 9 and the recesses 10 of the ends 7 and 7 are provided at equal intervals in the longitudinal direction of the sides in a plan view.

(Fifth embodiment)
FIG. 11 is an exploded perspective view showing a core material using offcuts according to the fifth embodiment of the present disclosure, and FIG. 12 is a perspective view of the same core material.

In the present embodiment, a step 15 is provided in the thickness direction of the offcuts 7, 7, and the convex portion 9 and the concave portion 10 that serve as the fitting structure portion 11 are formed in the step 15 portion. That is, in this example, each of the concave portion 10 and the convex portion 9 has a step in the thickness direction that fits into each other.

According to this configuration, the end material core material 22 is formed by the overlapping of the steps 15 in addition to the fit between the protrusions 9 and the recesses 10 of the end materials 7 and 7, and the arrow c (thickness direction) can be further increased. Therefore, the reliability of rigidity can be further improved.

(Sixth embodiment)
FIG. 13 is an exploded perspective view showing a core material using offcuts in the sixth embodiment of the present disclosure, and FIG. 14 is a perspective view of the same core material.

In the present embodiment, the convex portion 9 and the concave portion 10 that form the fitting structure portion 11 are composed of straight lines and curved lines. More specifically, in a plan view, the convex portion 9 is formed in a substantially circular shape connected to the end material 7 by a straight portion having a constant width. The concave portion 10 is formed in a shape that fits with the convex portion 9 . The hooking shape portions 13 of the fitting structure portion 11 described in the second embodiment are provided on both sides of each of the convex portion 9 and the concave portion 10 .

According to the configuration of the present embodiment, the component force of the curved portion 18 can enhance the effect of pressing the butting surfaces 8, 8 of the offcuts 7, 7 against each other. Therefore, it is possible to further improve the effect of preventing deterioration of the heat insulating properties of the abutting surfaces 8, 8 of the offcuts 7, 7. FIG.

The numbers of the protrusions 9 and the recesses 10 are not particularly limited, but may be about one or two. In one case, it is most preferable from the viewpoint of improving the rigidity to provide the protrusions 9 and the recesses 10 of the edge members 7, 7 at approximately the center of the sides in a plan view. In the two cases, it is preferable from the viewpoint of improving the rigidity that the protrusions 9 and the recesses 10 of the end members 7 and 7 are provided at equal intervals in the longitudinal direction of the sides in a plan view.

(Seventh embodiment)
FIG. 15 is a perspective view of a heat insulating box according to the seventh embodiment of the present disclosure;

The heat insulating box body 16 according to the present embodiment is used, for example, as a housing of a refrigerator. At least one of the vacuum heat insulating materials 1 described in the above-described embodiments is provided on the side surface, back surface, and top surface of the heat insulating box 16 . Although not shown, the door for opening and closing the heat insulating box 16 is also provided with at least one of the vacuum heat insulating materials 1 described in the above embodiments.

The heat insulating box 16 of the present embodiment uses the vacuum heat insulating material 1 which is inexpensive to produce, has a large cost reduction rate, is inexpensive, and has high dimensional accuracy and rigidity. Therefore, it is possible to realize the heat insulating box 16 at a low cost and with high reliability.

In addition, the application of the heat insulating box 16 is not limited to the housing of the refrigerator, but may be the housing of various refrigeration equipment such as vending machines, or a tank for LNG or the like, and is not particularly limited. Further, the application of the vacuum heat insulating material 1 shown in each embodiment is not limited to the heat insulating box body 16, but can also be applied to heat insulating panels such as housing materials.

As described above, the vacuum heat insulating material according to the present disclosure has been described using the embodiments, but the present disclosure is not limited to these, and can be variously changed within the scope of achieving the purpose of the present disclosure. . In other words, the scope of the present disclosure is indicated by the scope of claims rather than the above description, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

As described above, according to the present disclosure, it is possible to configure a core material with high dimensional accuracy using only offcuts. Therefore, it is possible to provide a vacuum heat insulating material with low production costs, a large cost reduction rate, low prices, and high dimensional accuracy and rigidity. Further, it is possible to provide a heat insulating box and a heat insulating panel using this vacuum heat insulating material. Therefore, the present disclosure can be widely applied to applications such as refrigerators, vending machines, hot water supply containers, heat insulating materials for automobiles, cold/heat insulating boxes, building material panels, and tanks such as LNG.

REFERENCE SIGNS LIST 1 vacuum insulation material 2 core material 3 outer covering material 3a laminated sheet 4 adsorbent 5 sealing portion 6 sheet material 7 end material 8 butt surface 9 convex portion 10 concave portion 11 fitting structure portion 12 notch 13 hook shape portion 14 taper 15 Step 16 Heat-insulating box 17 Corner portion 18 Curved portion 21 New core material 22 End material core material

Claims (5)

an outer covering material having gas barrier properties;
a first core material having an engagement portion with a notch provided at a corner;
a second core member arranged in parallel with the first core member and having an engaged portion that engages with the engaging portion;
Vacuum insulation with The notch has a function of absorbing a dimensional error when engaging the engaging portion and the engaged portion and strengthening the engagement between the engaging portion and the engaged portion.
The vacuum insulation material according to claim 1. The engaging portion and the engaged portion each have a hook shape that prevents disengagement,
The vacuum heat insulating material according to claim 1 or 2. 4. The vacuum according to any one of claims 1 to 3, wherein a part or the whole of the abutting surface portions of the first core material and the second core material are subjected to compression processing in the thickness direction. Insulation. Equipped with the vacuum insulation material according to any one of claims 1 to 4,
Insulated box.

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