JPH0885178A - Honeycomb sandwich panel - Google Patents

Abstract

PURPOSE: To prevent crock, deformation, warp and the like from occurrence, which are caused by heating treatment upon forming or the change of using atmosphere, when the material or the structure of both facing sheets is different and, further, prevent the croop, deformation, warp and the like, which are caused by a using atmosphere, in which temperatures are different in the front and rear sides of the member, when the material or the structure of both facing sheets is same. CONSTITUTION: A honeycomb sandwich panel is constituted of facing sheets 3, 4, bonded on both opening end faces of a core member or a honeycomb core 2. In this case, at least one of the facing sheets 3 is divided with a dividing gap 6 into a plurality of pieces of unit facing sheets 7, further, the core member or the honeycomb core 2 is divided into a plurality of unit honeycomb cores 9 by dividing it with a dividing gap 8 or the core member or the honeycomb core 2 is constituted of a continuous body wholely while being divided into a plurality of divisions by cut-in grooves 10.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to honeycomb sandwich panels. That is, the present invention relates to a honeycomb sandwich panel in which surface plate materials are joined to both opening end faces of a honeycomb core.

[0002]

2. Description of the Related Art In a honeycomb sandwich panel, a surface plate material is bonded to both open end faces of a honeycomb core, which is a planar aggregate of hollow columnar cells as a core material, by adhesion or the like. The honeycomb sandwich panel utilizes the characteristics that the honeycomb core has excellent weight-specific strength, heat retention, heat insulation, sound insulation, etc., and is used, for example, for walls, floors, doors, doors,
It is widely used for construction such as sliding doors and partitions, for construction, for joinery, for plate materials such as various boxes, containers and containers, and for various other purposes.

[0003]

By the way, the following problems have been pointed out in such a conventional example. First
In addition, the front and back surface plates of the honeycomb sandwich panel are often different in material and structure (whether it is a single plate or laminated plate, etc.), so that the front and back surface plates have a coefficient of thermal expansion and moisture absorption. The rates may be different. Therefore, due to the difference in thermal expansion and the difference in moisture absorption between the front and back surface plate materials when they are heat-treated for adhesion during molding as a honeycomb sandwich panel or when the usage environment changes during use. There is a problem that a warp or the like is likely to occur toward either side. That is, in the conventional honeycomb sandwich panel of this type, a tensile force or a compressive force acts on the entire front and back surfaces to easily generate stress, and bending, deformation, and warpage are likely to occur as a whole.

Secondly, even if the front and back surface materials of the honeycomb sandwich panel are made of the same material and structure (whether it is a single plate or a laminated plate, etc.), if the temperatures are different on the front and back sides,
For example, when it is used as a heat insulating panel, or in a use environment where only one side is exposed to the sun, warpage or the like is likely to occur in accordance with the place described in the above first. That is, in the conventional honeycomb sandwich panel of this type, bending, deformation, warpage and the like are likely to occur due to the difference in thermal expansion between the front and back.

In view of such circumstances, the present invention has been made to solve the problems of the above-mentioned conventional example. In claim 1, the surface plate material is divided, and in claim 2, the honeycomb core is divided. In the third aspect, the honeycomb core is provided with the notch groove, and in the fourth aspect, the notched fine hole is formed in the surface plate material. Secondly, it is an object of the present invention to propose a honeycomb sandwich panel capable of preventing warpage and the like when the front and back surfaces have different temperatures even when the materials and structures of both surface plate materials are the same.

[0006]

The technical means of the present invention for achieving this object are as follows. First, claim 1
About: That is, this honeycomb sandwich panel is formed by joining surface plate materials to both open end faces of a honeycomb core that is a planar aggregate of hollow columnar cells that are core materials, and at least one of the surface plate materials is separated by cutting. It is divided into multiple pieces. Claim 2 is as follows. That is, this honeycomb sandwich panel is the same as the honeycomb sandwich panel according to claim 1, wherein the honeycomb core as a core material is further divided into a plurality of pieces by division. Claim 3 is as follows. That is, this honeycomb sandwich panel
The honeycomb sandwich panel according to claim 1,
Further, the honeycomb core, which is a core material, is divided into a plurality of cut grooves and is connected as a whole. Claim 4
About: That is, this honeycomb sandwich panel is formed by joining surface plate materials to both opening end faces of a honeycomb core that is a planar aggregate of hollow columnar cells that are core materials, and at least one of the surface plate materials is not continuous. Many notched small holes are formed and are connected as a whole.

[0007]

Since the present invention comprises such means, it operates as follows. This honeycomb sandwich panel
Surface plate materials are respectively joined to both open end faces of the honeycomb core. In claim 1, at least one surface plate material is divided, further in claim 2, the honeycomb core is also divided, and in claim 3, a cut groove is formed in the honeycomb core. Formed. According to a fourth aspect, at least one surface plate member is formed with a notched fine hole.

[0008] Therefore, firstly, the front and back surface materials may differ in material and structure, and may differ in coefficient of thermal expansion and coefficient of moisture absorption. Therefore, in order to deal with this, by dividing the surface plate material and the honeycomb core, and providing cutout fine holes, cut grooves and the like in these, the heat treatment for bonding during molding or the use environment during use When it changes,
Differences in thermal expansion and moisture absorption between the front and back are dispersed. Therefore, the tensile force and the compressive force are prevented from acting on the front and back,
Deformation and warpage are prevented.

Secondly, even if both surface plate materials are the same in material and structure, when the surface plate materials and honeycomb cores are used under different usage environments where the temperature is different between the front and back surfaces, the surface plate materials and the honeycomb core are divided or cut into these. By providing the notched fine holes and the cut grooves, the difference in thermal expansion between the front and back is dispersed. Therefore, the tensile force and the compressive force are prevented from acting on the front and back,
Deformation and warpage are prevented.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings. 1, FIG. 2, FIG. 3 and FIG. 4 are perspective views of an embodiment of the present invention. FIG. 1 (1) is a first embodiment and FIG. 1 (2) is a second embodiment. For example, FIG. 1 (3) is a third embodiment, FIG. 2 (1) is a fourth embodiment, FIG. 2 (2) is a fifth embodiment, and FIG. ) FIG. 6 shows the sixth embodiment, FIG. 3 (1) shows the seventh embodiment, FIG. 3 (2) shows the eighth embodiment, and FIG. 3 (3) shows the ninth embodiment. FIG. 4 (1) shows the tenth embodiment, and FIG. 4 (2) shows the eleventh embodiment. FIG. 5 is a perspective view of a main part of the honeycomb core.

In the honeycomb sandwich panel, surface plate materials 3 and 4 are bonded to both open end faces of a honeycomb core 2 which is a planar aggregate of hollow columnar cells 1 which is a core material. First, these will be described in detail. The honeycomb core 2 which is the core material of the honeycomb sandwich panel is shown in FIG.
As shown in FIG. 3, the cell wall 5 is composed of a planar aggregate of a large number of hollow columnar cells 1 partitioned into independent spaces. The cross-sectional shape of the cell wall 5 and the cell 1 is typically a regular hexagon, but can be trapezoidal, triangular, quadrangular, or other various shapes. As the base material of the cell wall 5, that is, the honeycomb core 2, aluminum foil, aluminum hydroxide foil, other metal foil, aramid paper or other special paper, vinyl chloride sheet, other plastic sheet, fiber reinforced plastic sheet (FRP sheet). ), Other organic and inorganic composite materials including pulp, asbestos and carbon materials, and various other materials. It is known that the honeycomb core 2 has excellent strength-to-weight ratio, is lightweight, and has high rigidity and strength, and is also excellent in flatness accuracy, heat retention, heat insulation, sound insulation, rectification effect, and the like. There is.

Next, the surface plates 3 and 4 of the honeycomb sandwich panel are made of aluminum plates, other metal plates, melamine resin plates, other resin plates, fiber reinforced plastic plates, ceramics plates, carbon plates, and composite materials of these. Plates and other various materials are used. Further, as the surface plate members 3 and 4, one of these plates or a laminated plate in which a plurality of these plates are laminated is used. The honeycomb sandwich panel uses the above-mentioned honeycomb core 2 as a core material, and has surface plate materials 3 and 4 which are face materials on both open end faces of the cell 1, respectively.
Are heat-treated with an adhesive interposed therebetween to be joined by adhesion or the like. The surface plate materials 3 and 4 function, for example, for reinforcing the honeycomb core 2 that is the core material.

Each embodiment will be described below. First, in the honeycomb sandwich panel of the first embodiment shown in FIG. 1 (1), one surface plate member 3 is divided into a plurality of pieces by division. That is, in the first embodiment, one of the two surface plate members 3 and 4 (the surface plate member 3 in the illustrated example) is divided by a plurality of linear dividing gaps 6 which are orthogonal to each other in the vertical and horizontal directions, It is divided into individual, for example, square unit surface plate members 7. In other words, the one surface plate member 3 is the unit surface plate member 7 having such a dividing gap 6.
Of the above, and each is bonded to one open end surface of the honeycomb core 2 as a core material.

Next, in the honeycomb sandwich panel of the second embodiment shown in FIG. 1 (2), in addition to this, the honeycomb core 2 as a core material is further divided into a plurality of pieces by division. That is, in the second embodiment, in addition to the division of the one surface plate material 3 of the first embodiment, the honeycomb core 2 as the core material is further divided by a plurality of linear division gaps 8 orthogonal to each other in the vertical and horizontal directions. It is divided and divided into a plurality of, for example, square unit honeycomb cores 9. That is, the honeycomb core 2 is composed of an aggregate of the unit honeycomb cores 9 having the dividing gaps 8 as described above, and each of them has one opening end face.
It is joined to each unit surface plate member 7 of one surface plate member 3, and is also bonded to the other surface plate member 4 at the other opening end face. In the illustrated example, the dividing gaps 6 of the one surface plate member 3 and the dividing gaps 8 of the honeycomb core 2 are vertically aligned so as to coincide with each other, and thus each unit surface plate member 7 of the one surface plate member 3 is aligned. And the unit honeycomb cores 9 of the honeycomb core 2 are completely overlapped with each other in the vertical direction, but this does not necessarily have to be the case. That is, the dividing gaps 6 and the dividing gaps 8 do not have to match in the vertical direction but may have different pitches, numbers, directions, etc., so that the unit surface plate members 7 and the unit honeycomb cores 9 are completely aligned in the vertical direction. Do not overlap and may have different sizes, shapes, numbers, etc.

Further, in the honeycomb sandwich panel of the third embodiment shown in FIG. 1 (3), the honeycomb core 2 as the core material is used.
However, it is connected as a whole while being divided into a plurality of parts by each cut groove 10. That is, in the third embodiment, in addition to the division of the one surface plate member 3 of the first embodiment described above, further, the surface plate member 3 side of the honeycomb core 2 as a core member is formed by a plurality of linear shapes that are orthogonal to each other in the vertical and horizontal directions. Each notch groove 10
Although it is divided into a plurality of parts, the parts are connected on the side of the other surface plate 4 as a whole. That is, unlike the second embodiment described above, this honeycomb core 2 is not completely divided into a plurality of unit honeycomb cores 9 by division, and the division is prevented on the way and is connected to one sheet. A cut groove 10 is formed in which the dividing gap 8 is blocked midway. In the honeycomb sandwich panel of the third embodiment, unlike the honeycomb sandwich panel of the second embodiment, the honeycomb core 2 is not completely divided, so that the overall rigidity /
There is an advantage that the strength does not decrease as much as that of the second embodiment. The honeycomb core 2 according to the third embodiment
Each of the cut grooves 10 also conforms to the dividing gaps 8 of the honeycomb core 2 of the second embodiment and does not match the dividing gaps 6 of the one surface plate material 3, that is, regardless of the illustrated example, various pitches and sizes. , Shape, number, etc. may be adopted.

Next, the fourth and fifth embodiments shown in FIGS. 2A and 2B will be described. In the honeycomb sandwich panels of the fourth and fifth embodiments, according to the first embodiment described above, only one surface plate member 3 is divided into a plurality of unit surface plate members 7 by division. Occurrence of a warp due to its overall shape (square in the first embodiment, vertically long rectangle in the fourth embodiment, circular in the fifth embodiment), overall size and size, etc. Since the situation is different, the pitch, number, direction, etc. of the dividing gaps 6 are changed from those of the first embodiment in order to cope with these. That is, the dividing gap 6 of the fourth embodiment is set only in the horizontal direction in consideration of the overall shape being a vertically long rectangle, and the dividing gap 6 of the fifth embodiment has a circular shape in its overall shape. Two horizontal units and one vertical unit are set at a wider pitch, and the central two unit surface plate members 7 are relatively large. As described above, according to the overall shape and overall dimensions of the honeycomb sandwich panel, it is conceivable to adopt the dividing gaps 6 of various pitches, numbers, directions, sizes, etc. in order to prevent the warpage and the like from occurring. Incidentally, the adoption of such various kinds of division gaps 6 (further, the division gaps 8 and the cut grooves 10) can be considered in the same manner in the second embodiment and the third embodiment described above.

In the honeycomb sandwich panel of the sixth embodiment shown in FIG. 2 (3), the sheet 11 is bonded to the surface of the thus cut surface plate material 3 by adhesion or the like. That is, in the honeycomb sandwich panels of the above-described first, second, third, fourth and fifth embodiments, the surface plate material 3 is divided into the unit surface plate materials 7 at the dividing gaps 6. ing. Therefore, if it does not look good as it is, a sheet 11 made of a flexible material such as a rubber material is joined afterwards through each unit surface plate member 7 so as to cover the outer surface thereof, and functions as a blindfold or the like. In the illustrated example, the sheet 11 is joined to that of the first embodiment, but of course, the second, third, fourth, fifth
It is conceivable to similarly join the sheet 11 in each of the embodiments, and the same applies to each of the seventh, eighth, ninth, tenth, and eleventh embodiments described below.

By the way, in the honeycomb sandwich panel of each of the above-mentioned first, second, third, fourth, fifth and sixth embodiments, the dividing gap 6 of the surface plate member 3 and further the honeycomb core 2 thereof. The dividing gap 8 and the cut groove 10 are formed as follows. As a first forming method, first, one surface plate material 3 and one surface plate material 4 are bonded to both opening end faces of the honeycomb core 2, and then one surface plate material 3 is joined.
Further, the honeycomb core 2 is subjected to cutting and cutting operations from the outer surface side of the surface plate material 3 to form predetermined dividing gaps 6, dividing gaps 8, cut grooves 10, etc., and each predetermined unit surface plate material 7 It is conceivable to obtain each unit honeycomb core 9 and the like to form a honeycomb sandwich panel. As the second forming method, first, a cutting operation and a cutting operation are performed on one surface plate material 3 or honeycomb core 2 to provide a predetermined unit surface plate material 7, each unit honeycomb core 9, or a cut groove 10. Honeycomb cores 2 and the like are manufactured, and then these are separated from the other surface plate material 4, the honeycomb core 2, the unit honeycomb cores 9 and the like by a predetermined dividing gap 8 and dividing gap 6 respectively.
It is also conceivable that the honeycomb sandwich panel is made by joining them while maintaining the above.

Next, the seventh and eighth embodiments of FIGS. 3A and 3B will be described. In the honeycomb sandwich panels of the seventh and eighth embodiments, one surface plate member 3 has a large number of notched small holes 12 which are not continuous.
However, the surface plate material 3 is connected as a whole. That is, the surface plate material 3 of the seventh embodiment and the eighth embodiment is the same as the above-mentioned first, second, third, fourth, fifth.
As in the case of the surface plate material 3 of each of the sixth embodiments, there are a large number of short vertical and horizontal linear cutout holes 12 that are not continuous with each other without being divided into the unit surface plate materials 7 by the dividing gaps 6. It is formed of a single plate that is connected and overall reduces rigidity and strength. And such a seventh
The surface plate material 3 of the embodiment and the eighth embodiment is, first of all, made of a single plate without being divided, so that the rigidity and strength are not significantly reduced, and the original reinforcing function is not impaired. The sandwich panel also has the advantage of excellent rigidity and strength. Secondly, the surface plate material 3 is divided, and as a forming method thereof, a large number of unit surface plate materials 7 are manufactured in advance and are joined to the honeycomb core 2 with the dividing gaps 6 therebetween. Compared with the case, the notched small holes 12 can be formed easily and easily, which is also advantageous in that the workability of manufacturing the honeycomb sandwich panel is excellent. The cutout small holes 12 can be formed at various pitches, numbers, directions, sizes, etc. other than the illustrated example.

Next, a ninth embodiment shown in FIG. 3 (3) will be described. In the honeycomb sandwich panel of the ninth embodiment, both surface plate materials 3 and 4 are divided into a plurality of pieces by division. That is, in the ninth embodiment, as in the first, second, third, fourth, fifth and sixth embodiments described above, not only one surface plate member 3 but also the other surface plate member 3 is used. 4 is also divided by the division gap 6 and divided into a plurality of unit surface plate members 7. Furthermore, as another embodiment (not shown), notch fine holes 12 are formed in one surface plate member 3 as in the above-described seventh and eighth embodiments, and the other surface plate member 4 is also formed. However, it is also possible to form the notched fine holes 12 in the same manner. And in this way, about both surface board materials 3 and 4,
Forming the dividing gaps 6 and the notched fine holes 12 has an advantage that the honeycomb sandwich panel can surely maintain the symmetry of rigidity and strength on the front and back sides. In addition,
In the ninth embodiment and the like, other configurations and the like are the same as those described in the above-described embodiments.

Incidentally, the tenth part of FIGS. 4 (1) and 4 (2).
In the embodiment and the eleventh embodiment, strength reinforcing means such as the reinforcing frame 13 and the reinforcing beam 14 are further provided. That is, in the honeycomb sandwich panels of the tenth embodiment and the eleventh embodiment, with respect to the one of the above-mentioned first embodiment, the reinforcing frame 13 is externally fitted and fixed to the outer peripheral side end surface, or one of A reinforcing beam 14 is attached and fixed to the surface of the surface plate member 3 (further, the reinforcing beam 14 may be attached and fixed to the other surface plate member 4 as well). In addition to the first embodiment, the reinforcing frame 13 and the reinforcing beam 14 are provided in each of the second, third, fourth, fifth, sixth, seventh, eighth and ninth embodiments. It is also possible. By providing the reinforcing frame 13 and the reinforcing beam 14 in this way, especially when the surface plate members 3 and 4 are divided,
There is an advantage that the reduction in rigidity and strength of the entire honeycomb sandwich panel is reinforced.

The present invention is constructed as described above. Then it becomes as follows. In this honeycomb sandwich panel, surface plate materials 3 and 4 are bonded to both open end surfaces of a honeycomb core 2 which is a core material. Then, FIG. 1 (1) diagram, FIG. 2 (1) diagram, (2) diagram,
(3), (3) in FIG. 3, (1) in FIG. 4, (2), etc., the first, fourth, fifth, sixth, ninth, tenth, and eleventh In each embodiment, the surface plate material 3 (further, the surface plate material 4)
In the second embodiment shown in FIG. 1B, in addition to this, the honeycomb core 2 as the core material is also divided in the dividing gap 8 to divide it in the dividing gap 6. (3) Third in the figure
In the embodiment, the cut groove 10 is formed in the honeycomb core 2 which is the core material.
Is formed. In addition, FIG. 7 (1) and FIG. 7 (2)
In the embodiment and the eighth embodiment, the surface plate material 3 (further, the surface plate material 4) is formed with the notched fine holes 12. Therefore, such a honeycomb sandwich panel has the following first and second aspects.

First, the front and back surface materials 3 and 4 of the honeycomb sandwich panel are often different in material and structure (single plate or laminated plate, etc.). For example,
When it is used for construction such as walls, floors, doors, doors, sliding doors, sliding doors, partitions, etc., for construction and fittings, considering the requirements of interior and cost, for example, the front side that is noticeable Only one of the front surface plate members 3 is made of a high-quality material or structure to provide a high-class feeling to satisfy the demand for interior surfaces, and the other surface plate member 4 such as the invisible back side is
Honeycomb sandwich panels, which are made of low-priced materials and structures so as to meet the cost requirement, have been widely adopted recently. In such a honeycomb sandwich panel, due to the difference in material and structure between the front and back surface plate materials 3 and 4, between the front and back surface plate materials 3 and 4,
The coefficient of thermal expansion and the coefficient of moisture absorption often differ. Therefore,
In this honeycomb sandwich panel, the surface plate material 3 (further, the surface plate material 4) is divided at the dividing gaps 6, or the notched fine holes 12 are formed in the surface plate material 3 (further, the surface plate material 4). Correspondingly, the honeycomb core 2 is divided at the division gap 8 or the cut groove 10 is formed in the honeycomb core 2,
Therefore, the occurrence of warpage or the like is prevented.

That is, when the honeycomb sandwich panel is molded, heat treatment is applied to bond the honeycomb core 2 and the surface plate members 3 and 4, or the use environment is changed during use. Due to the presence of the gap 6, the notched fine hole 12, the dividing gap 8, the cut groove 10, etc., the difference in thermal expansion and the difference in moisture absorption between the front and back surface plate members 3, 4 are finely dispersed. Therefore, in this honeycomb sandwich panel, like the conventional example of this kind described above, it is prevented that a tensile force or a compressive force acts on the front and back as a whole,
Since the stress is also dispersed, the overall bending, deformation, warp, etc. do not occur (note that some bending, deformation, warp, etc. may be seen for each unit surface plate material 7, Does not affect the whole).

Secondly, the following is also applied to the case where the front and back surface plates 3 and 4 of the honeycomb sandwich panel have the same material and structure (single plate or laminated plate, etc.).
That is, when used in environments where the temperatures are different on the front and back, for example, when used as a heat insulating panel or in an environment where only one side is exposed to the sun, warpage etc. is prevented from occurring. . That is, in this honeycomb sandwich panel, due to the existence of the above-mentioned surface plate material 3 (further, surface plate material 4) and the dividing gaps 6 of the honeycomb core 2, the notched fine holes 12, the dividing gaps 8, the cut grooves 10, and the like,
Since the difference in thermal expansion between the front and back is finely dispersed, it is possible to prevent the tensile force and the compressive force from acting on the front and back as a whole as in the conventional example of the kind described above, and the stress is also dispersed. No bending, deformation, warpage, etc.

[0026]

As described above, the honeycomb sandwich panel according to the present invention divides the surface plate material in claim 1, further divides the honeycomb core in claim 2, and cuts grooves in the honeycomb core in claim 3. By forming a notched fine hole in the surface plate material in claim 4,
It has the following effects.

First, the warpage and the like when the materials and structures of both surface plate materials are different are prevented. That is, this honeycomb sandwich panel has the above-described conventional type when the materials and structures of both surface plate materials are different, when it is heat-treated for adhesion during molding, or when the use environment changes during use. As in the example, there is no bending, deformation, or warpage as a whole.

Secondly, even when both surface plate materials are the same in material and structure, warpage and the like when the temperature is different between the front and back surfaces can be prevented. That is, this honeycomb sandwich panel has the same material and structure of both surface plate members,
When used in an environment where the temperature is different between the front and back, there is no overall bending, deformation, warpage, etc., unlike the conventional example of this kind described above. As described above, the effects of the present invention are remarkably large, such as the problems existing in this type of conventional example are eliminated.

[Brief description of drawings]

FIG. 1 is a perspective view of a honeycomb sandwich panel according to the present invention, where (1) is a first embodiment and (2) is a second embodiment.
An embodiment, (3) shows a third embodiment.

[Fig. 2] Fig. 2 is a perspective view of the same honeycomb sandwich panel, (1) shows a fourth embodiment, (2) shows a fifth embodiment, and (3) shows a sixth embodiment.

[Fig. 3] Fig. 3 is a perspective view of the same honeycomb sandwich panel, in which (1) shows a seventh embodiment, (2) shows an eighth embodiment, and (3) shows a ninth embodiment.

[Fig. 4] Fig. 4 is a perspective view of the honeycomb sandwich panel, in which (1) shows a tenth embodiment and (2) shows an eleventh embodiment.

FIG. 5 is a perspective view of a main part of the honeycomb core.

[Explanation of symbols]

 1 Cell 2 Honeycomb Core 3 Surface Plate Material 4 Surface Plate Material 5 Cell Wall 6 Dividing Gap 7 Unit Surface Plate Material 8 Dividing Gap 9 Unit Honeycomb Core 10 Notch Groove 11 Sheet 12 Notch Small Hole 13 Reinforcing Frame 14 Reinforcing Beam

Claims (4)

[Claims] 1. A honeycomb sandwich panel in which a surface plate material is bonded to both open end faces of a honeycomb core, which is a planar aggregate of hollow columnar cells as a core material,
A honeycomb sandwich panel, wherein at least one of the surface plate materials is divided into a plurality of pieces by division. 2. The honeycomb sandwich panel according to claim 1, wherein the honeycomb core, which is a core material, is further divided into a plurality of pieces by division. 3. The honeycomb sandwich panel according to claim 1, wherein the honeycomb core, which is a core material, is further connected to the honeycomb core while being divided into a plurality of grooves by cutting grooves. 4. A honeycomb sandwich panel in which surface plate materials are bonded to both open end faces of a honeycomb core, which is a planar aggregate of hollow columnar cells as a core material,
A honeycomb sandwich panel, characterized in that at least one of the surface plate members is formed with a large number of notched fine holes which are not continuous and are connected as a whole.