JP7007775B1 - Structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure which is lightweight and has high strength against a load. SOLUTION: A first cross-shaped plate 10 formed in a cross shape is identical to the periphery of a first cross-shaped plate 10 around a central axis formed by gathering one short side of each of four rectangular plates. It is a structure 1 provided with a structural portion in which the second cross-shaped plate 12 to the fifth cross-shaped plate 18 having a shape are arranged. [Selection diagram] Fig. 1

Description

The present invention relates to a structure, and more particularly to a structure applicable to a building panel member such as a shelf board or a soundproof panel.

Conventionally, as building panel members used for building interior materials and furniture materials, wood materials such as plywood, particle board, and wood fiber board such as MDF are used as a base material, and a thrust plate, a resin sheet, etc. are used on the surface. Panel members to which decorative sheet materials are attached are known. Since the panel member using such a wood material as a base material has a large weight, there are problems that it is difficult to handle during transportation and construction, and that the use of wood resources has a large burden on the environment.

In recent years, instead of a panel member using a wood-based material as a base material as described above, a core material composed of a predetermined structure is arranged in an outer frame formed by framing a vertical frame and a horizontal frame. A so-called flash panel (also referred to as a sandwich panel) formed by pasting face materials on the front and back surfaces is used as a building panel member. As a structure applicable to the core material of such a flash panel, a structure composed of an aggregate of geometrically shaped frame-shaped cells such as a honeycomb shape and a rhombus shape, and a structure such as a foam are adopted. ..

Specifically, building panel members to which such a structure is applied include, for example, a plate-shaped base material having a core material sandwiched between at least two plates, and one or more or more provided on the end face of the base material. A decorative board including a reinforcing plate and a decorative sheet to be attached to the surface of the base material. The base material has a honeycomb structure as a core material, and the decorative sheet is reinforced from one plate surface side of the base material. A building panel member including a plate and covering the end surface of the base material and being attached to the other plate surface side has been proposed (Patent Document 1).

Japanese Unexamined Patent Publication No. 2013-146872

The structure applicable to the core material of the conventional flash panel uses a core material having a honeycomb structure as in Patent Document 1, but a flash panel using a core material having a honeycomb structure is, for example, a shelf material. In this case, the strength against the load from above was not always sufficient. In particular, the core material of the conventional flash panel uses paper as a material in order to reduce the weight, so that the strength against a load from above is not sufficient.

An object of the present invention is to provide a structure which is lightweight and has high strength against a load.

As a result of diligent research to solve the above problems, the present inventors have formed a first cross-shaped plate in a cross shape centered on a central axis formed by aggregating one short side of each of the four rectangular plates. The present invention has been found to be able to solve the above-mentioned problems by forming a structure having a structural portion in which the second cross-shaped plate to the fifth cross-shaped plate having the same shape are arranged around the first cross-shaped plate. Has been completed.

That is, the present invention is as follows.
[1] A structure having a structural portion in which a second cross-shaped plate to a fifth cross-shaped plate having the same shape are arranged around the first cross-shaped plate.
Each of the first cross-shaped plate to the fifth cross-shaped plate is composed of four rectangular plates, which are erected with the long side surface of the rectangular plate as the bottom surface, and one short side of each of the four rectangular plates is assembled. A cross consisting of an upper plate portion, a lower plate portion, a right plate portion, and a left plate portion is formed around the central axis formed by the above plate.
The center of the second cross-shaped plate is half the length from the center of the first cross-shaped plate, the length of the long side of the plate above, and the length of the long side of the plate plus the thickness of the plate to the right. It is arranged at a position separated by the length obtained by adding the thickness, and the upper side surface of the upper plate portion of the first cross-shaped plate is in contact with the lower surface of the left plate portion of the second cross-shaped plate, and the first The upper surface of the right plate portion of the 1-cross-shaped plate and the lower side surface of the lower plate portion of the second cross-shaped plate are brought into contact with each other.
The center of the 3rd cross-shaped plate is from the center of the 1st cross-shaped plate to the length of the long side of the plate on the right, and the length of the plate is half the length of the long side of the plate plus the thickness of the plate below. It is placed at a position separated by the length obtained by adding the thickness, and the right side surface of the right plate portion of the first cross-shaped plate and the left surface of the upper plate portion of the third cross-shaped plate are in contact with each other and the first The right surface of the lower plate portion of the 1-cross-shaped plate and the left surface of the left plate portion of the 3rd cross-shaped plate are in contact with each other.
The center of the 4th cross-shaped plate is half the length of the long side of the plate below the center of the 1st cross-shaped plate, and the length of the long side of the plate plus the thickness of the plate on the left. It is arranged at a position separated by the length added to the thickness, and the lower side surface of the lower plate portion of the first cross-shaped plate is in contact with the upper surface of the right plate portion of the fourth cross-shaped plate, and the first The lower surface of the left plate portion of the 1-cross-shaped plate and the upper side surface of the upper plate portion of the 4th cross-shaped plate are brought into contact with each other.
The center of the 5th cross-shaped plate is half the length of the long side of the plate on the left and the thickness of the plate added to the long side of the plate from the center of the 1st cross-shaped plate. It is placed at a position separated by the length obtained by adding the thickness, and the left side surface of the left plate portion of the first cross-shaped plate and the right surface of the lower plate portion of the fifth cross-shaped plate are in contact with each other and the second 1 A structure characterized in that the left surface of the upper plate portion of the cross-shaped plate and the right surface of the right plate portion of the fifth cross-shaped plate are in contact with each other.

[2] At least one of the second to fifth cross plates is a first cross plate, and second to fifth cross plates of the same shape are arranged around the first cross plate. The structure according to the above [1].
[3] The structure according to the above [1] or [2], which is made of a vegetable-derived resin.
[4] The structure according to the above [3], wherein the plant-derived resin is polylactic acid (PLA).
[5] The structure according to any one of the above [1] to [4], which is integrally molded by a 3D printer.
[6] The structure according to any one of the above [1] to [5], which is a core material of a building panel member.

[7] A building panel member characterized in that the structure according to any one of the above [1] to [6] is used as a core material.
[8] The building panel member according to the above [7], which is a shelf board.
[9] The building panel member according to the above [7], which is a soundproof panel.
[10] The building panel member according to the above [7], which is a light-shielding louver.

The structure of the present invention is lightweight and has high strength against a load.

It is a schematic plan view of the structure which concerns on one Embodiment of this invention, and shows the 1st cross-shaped plate to the 5th cross-shaped plate. It is a schematic perspective view of the 1st cross-shaped plate of the structure which concerns on one Embodiment of this invention. It is a schematic plan view of the structure which concerns on one Embodiment of this invention, and shows the 1st'cross-shaped plate to the 5th'cross-shaped plate. It is a schematic plan view of an example of a building panel member manufactured by using the structure which concerns on one Embodiment of this invention. It is explanatory drawing of another example of the building panel member manufactured using the structure which concerns on one Embodiment of this invention, (a) is a schematic perspective view, (b) is a schematic plan view of a structure. Is. It is a photograph of a shelf board manufactured in an embodiment, (a) shows an enlarged view of a structure, (b) is a veneer board attached from above, a building panel member manufactured using an aluminum core, and a structure. The building panel member manufactured by using is shown, and (c) shows the building panel member manufactured by using a feather core. It is explanatory drawing which shows the outline of the deflection test. It is explanatory drawing which shows the outline of the normal force test.

Hereinafter, embodiments of the structure of the present invention will be specifically described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in FIG. 1, the structure 1 according to the embodiment of the present invention has a second cross-shaped plate 12, a third cross-shaped plate 14, and a fourth cross-shaped plate having the same shape around the first cross-shaped plate 10. It has a structural portion in which the plate 16 and the fifth cross-shaped plate 18 are arranged. In FIG. 1, the solid line and the broken line distinguish the structural parts of the first to fifth cross-shaped plates 10 to 18 in the structure 1, and are not patterns. Further, the hatching distinguishes the first to fifth cross-shaped plates 10 to 18, and is not a pattern.

Since the first cross-shaped plate to the fifth cross-shaped plate have the same configuration, the first cross-shaped plate will be specifically described as an example.
As shown in FIG. 2, the first cross-shaped plate 10 is composed of rectangular plates 20 to 26 having a long side (a) of 30 mm, a short side (b) of 15 mm, and a thickness (c) of 2 mm. The first cross-shaped plate 10 is erected with the long side surfaces of the four rectangular plates 20 to 26 as the bottom surface, and is centered on the central axis 28 formed by gathering one short side of each of the rectangular plates 20 to 26. It is formed in a cross shape including an upper plate portion 20, a lower plate portion 22, a right plate portion 24, and a left plate portion 26.

The length of the long side (a) of the first cross-shaped plate 10 is not limited to the above length, and can be appropriately set depending on the intended use. For example, it is preferably 10 to 200 mm, and 15 It is more preferably to 100 mm, and even more preferably 20 to 50 mm. The length of the short side (b) is preferably 5 to 100 mm, more preferably 8 to 50 mm, and even more preferably 10 to 30 mm. The thickness thereof is preferably 0.1 to 15 mm, more preferably 0.5 to 8 mm, and even more preferably 1 to 4 mm.

As the material of the first cross-shaped plate 10, a material having a predetermined strength can be adopted, and examples thereof include plastic (synthetic resin) and metal, and plastic is preferable from the viewpoint of weight reduction. Specific examples of the plastic include rigid vinyl chloride resin, polypropylene resin, rigid polyethylene resin, polylactic acid (PLA), and the like, and polylactic acid is preferable.

As shown in FIG. 1, the second cross-shaped plate to the fifth cross-shaped plate 12 to 18 are arranged around the first cross-shaped plate 10 and are integrally formed. The distance (X) from the right surface of the upper plate portion 20 of the first cross-shaped plate 10 to the left surface of the lower plate portion 22 of the second cross-shaped plate 12 is 14 mm. Similarly, the distance from the lower surface of the right plate portion 24 of the first cross plate to the upper surface of the left plate portion 26 of the third cross plate 14, and the fourth cross from the left surface of the lower plate portion 22 of the first cross plate 10. The distance from the upper surface of the left plate portion 26 of the first cross-shaped plate 10 to the lower surface of the right plate portion 24 of the fifth cross-shaped plate 18 is also 14 mm.

Specifically, the center of the second cross-shaped plate 12 is located above the center of the first cross-shaped plate 10 by the length of the long side of the plate (30 mm) and to the right on the long side of the plate (30 mm). The length (18 mm) obtained by adding the thickness (2 mm) of the plate to half the length obtained by adding the thickness (2 mm) of the first cross-shaped plate 10 is arranged at a distance of the upper plate portion 20 of the first cross-shaped plate 10. The upper side surface is in contact with the lower surface of the left plate portion 26 of the second cross-shaped plate 12, the upper surface of the right plate portion 24 of the first cross-shaped plate 10 and the lower plate portion of the second cross-shaped plate 12. The lower side surface of the 22 is abutted, and the center of the third cross-shaped plate 14 is from the center of the first cross-shaped plate 10 to the right by the length of the long side of the plate (30 mm), and the long side of the plate below. The first cross-shaped plate 10 is arranged at a distance (18 mm) by the length (18 mm) obtained by adding the plate thickness (2 mm) to half the length obtained by adding the plate thickness (2 mm) to (30 mm). The right side surface of the right plate portion 24 and the left surface of the upper plate portion 20 of the third cross-shaped plate 14 are in contact with each other, and the right surface of the lower plate portion 22 of the first cross-shaped plate 10 and the third cross-shaped plate. The left side surface of the left plate portion 26 of 14 is in contact with the left surface, and the center of the fourth cross-shaped plate 16 is located below the center of the first cross-shaped plate 10 by the length of the long side of the plate (30 mm). It is placed at a distance of half the length of the long side (30 mm) of the board plus the thickness of the board (2 mm) plus the thickness of the board (2 mm) (18 mm). The lower side surface of the lower plate portion 22 of the cross-shaped plate 10 and the upper surface of the right plate portion 24 of the fourth cross-shaped plate 16 are brought into contact with each other, and the lower surface of the left plate portion 26 of the first cross-shaped plate 10 and the lower surface of the left plate portion 26. The upper side surface of the upper plate portion 20 of the fourth cross-shaped plate 16 is in contact with the upper side surface, and the center of the fifth cross-shaped plate 18 is the length of the long side of the plate to the left from the center of the first cross-shaped plate 10. (30 mm), at a distance (18 mm) by the length of the long side (30 mm) of the board plus the thickness of the board (2 mm) plus the thickness of the board (2 mm). Arranged, the left side surface of the left plate portion 26 of the first cross-shaped plate 10 and the right surface of the lower plate portion 22 of the fifth cross-shaped plate 18 are brought into contact with each other, and the upper plate portion of the first cross-shaped plate 10 is brought into contact with each other. The left surface of 20 and the right surface of the right plate portion 24 of the fifth cross-shaped plate 18 are in contact with each other.

As shown in FIG. 3, the structure 1 has a second'to fifth'cross shape having the same shape around the third cross-shaped plate (hereinafter referred to as the first'cross-shaped plate in FIG. 3) 14. Plates 30 to 36 are arranged. That is, the structure 1 according to the embodiment of the present invention has a specific structure in which structural portions in which four cross-shaped plates having the same shape are arranged are continuously formed around one cross-shaped plate. is doing. The 5'cross-shaped plate 36 is the first cross-shaped plate 10 in FIG. 1. Further, since the 2nd to 4th cross-shaped plates 30 to 34 have the same configuration as the first cross-shaped plate 10 in FIG. 1, the description thereof will be omitted.

The structure 1 of the present invention is preferably configured by being integrally molded. Examples of the method of integral molding include a method of integrally molding with a 3D printer and a method of pouring a material into a mold such as casting or injection molding and hardening the material.

Since the structure 1 of the present invention has the above-mentioned specific structure, the deflection is small and the strength against a load is high even though the amount of the material used is small.

The structure 1 of the present invention described above can be used, for example, as a core material for a building panel member. Specifically, as an embodiment of the building panel member having the structure 1 as a core material, an embodiment including the structure 1 and a frame material surrounding the periphery of the structure 1, and further, front and back surfaces of the structure. Examples thereof include a mode (flash panel) provided with sheet materials arranged on both sides, and specific examples thereof include a shelf board, a soundproof panel, a light-shielding louver (highlight louver), and the like.

Next, an example of a building panel member manufactured by using the structure 1 according to the above embodiment will be described.
As shown in FIG. 4, the building panel member 38 includes a structure 1 and frame members 40 to 46 surrounding the structure 1. In the structure 1, the upper plate portion 20 and the lower plate portion 22 of the first to fifth cross-shaped plates 10 to 18 are parallel to the frame members 44 and 46 surrounding the periphery of the structure 1, and the right plate portion 24 and the right plate portion 24 and the structure 1 are formed. The left plate portion 26 is arranged in parallel with the frame members 40 and 42 surrounding the periphery of the structure 1, and is formed in a flat plate shape having a width of about 720 mm, a length of about 240 mm, and a thickness of about 15 mm. The long frame members 40 and 42 have a width of about 800 mm, a length of about 40 mm, and a thickness of about 15 mm, respectively, and are attached to the side surface of the structure 1 in the longitudinal direction. The short frame members 44 and 46 have a width of about 40 mm, a length of about 240 mm, and a thickness of about 15 mm, and are attached to the side surface of the structure 1 in the lateral direction. The building panel member 38 can be used, for example, as a light-shielding louver (highlight louver).

The building panel member 38 can be further made into a flash panel by attaching, for example, a sheet material made of plywood to the front and back surfaces (the surface where the structure 1 is exposed). In this case, the building panel member 38 can be used, for example, for a shelf board, a soundproof panel, fittings, a toilet booth, a table, or the like.

Another example of the building panel member manufactured by using the structure 1 according to the above embodiment will be described. The building panel member 48 according to another example shown in FIG. 5 has structural parts (upper plate portion 20, lower plate portion 22, right plate portion 24, and left plate portion 26) of the first to fifth cross-shaped plates of the structure 1. ) Is different from the above example in that it is arranged in an inclined state with the frame material surrounding the structure. The members having the same structure as that of the structure 1 are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 5, in the building panel member 48, the structural portion of the first to fifth cross plates of the structure is inclined by a predetermined angle (45 °) with the frame members 40 to 46 surrounding the structure. The circumference is cut so as to be in a state, and the whole structure 1'is formed in a flat plate shape having a width of about 720 mm, a length of about 240 mm, and a height of about 15 mm. A sheet material 50 made of plywood is attached to the front and back surfaces of the building panel member 48.

The strength of the structure of the present invention was investigated.

[Deflection test 1]
(Example 1)
A veneer board having a width of 800 mm, a length of 320 mm, and a thickness of 4 mm was attached to the front and back surfaces of a building panel member 38 manufactured using the structure of the present invention to prepare a shelf board, and a strength test was conducted.

(Comparative Example 1)
A shelf board was manufactured in the same manner as in Example 1 except that the structure was a feather core (manufactured by Shin Nihon Feather Core Co., Ltd.). As the feather core, a core base paper, a reinforced core base paper, and a water-resistant core base paper were continuously molded and laminated in a corrugated manner.

(Comparative Example 2)
A shelf board was manufactured in the same manner as in Example 1 except that the structure was an aluminum core (manufactured by Pioneer Tech Co., Ltd.). The aluminum core had a thickness of 0.6 mm and a grid size of 15 mm × 15 mm, and the grid density in the frame material was larger than that of the structure of the present invention.

6A and 6B are photographs of shelf boards manufactured in Examples, FIG. 6A shows an enlarged view of a structure, and FIG. 6B is a building panel member manufactured by using a veneer board and an aluminum core attached from above. , A building panel member manufactured using a structure, and (c) shows a building panel member manufactured using a feather core.

As the test method, a test based on the method of the deflection test (level 2) of the shelf board of JIS S1200: 2012 6.1.3 was used. FIG. 7 is an explanatory diagram showing an outline of the deflection test 1.
Specifically, as shown in FIG. 7, a weight of 37.3 kg [1.5 kg / dm ² ] is uniformly placed on a shelf board in which both ends 20 mm are placed on a support base, and the weight is uniformly placed in that state for 7 days (7 days). 168 hours) left unattended. The amount of deflection of the shelf board after being left to stand was measured with an accuracy of 0.1 mm, and the deflection rate with respect to the distance between the shelf board supports was calculated. The following formula was used to calculate the deflection rate.

Deflection rate [%] = Deflection amount / Distance between shelf board supports x 100

After unloading the weight, each part of the test piece was examined for any abnormalities such as damage, looseness, and deformation that hindered its use.

The shelf board according to Example 1 had a measured deflection amount of 4.0 mm and a deflection rate of 0.5% with respect to the distance between the shelf board supports (762 mm).
On the other hand, in the shelf board according to Comparative Example 1, the measured deflection amount was 4.3 mm, and the deflection rate with respect to the distance between the shelf board supports (762 mm) was 0.6%. Further, the shelf board according to Comparative Example 2 had a measured deflection amount of 3.6 mm and a deflection rate of 0.5% with respect to the distance between the shelf board supports (762 mm).
As for the shelf board according to Example 1, the shelf board according to Comparative Example 1, and the shelf board according to Comparative Example 2, no abnormality was observed in each part of the test piece after the test was completed.

[Deflection test 2 (normal force test)]
(Example 2)
A strength test was conducted using the shelf board according to Example 2 having the same configuration as the shelf board according to Example 1 of the deflection test 1.

(Comparative Example 3)
The shelf board according to Comparative Example 3 having the same configuration as the shelf board according to Comparative Example 1 of the deflection test was used.

(Comparative Example 4)
The shelf board according to Comparative Example 4 having the same configuration as the shelf board according to Comparative Example 2 in the deflection test was used.

As the test method, a test was used with reference to the normal force test (Category 2) of the main working surface in JIS S1205: 1998 7.1.1. FIG. 8 is an explanatory diagram showing an outline of the deflection test 2.
Specifically, as shown in FIG. 8, a backing plate (a rigid disk having a diameter of 100 mm, a flat surface, and rounded edges to 12 mm) is placed in the center of the shelf plate with both ends 20 mm placed on a support base. A force of 750 N (about 76.5 kgf) was applied vertically 10 times through the shelf. The time for applying the force was 10 seconds at a time. The maximum amount of deflection at the central end of the shelf board in the longitudinal direction was measured with an accuracy of 0.1 mm.

After the test was completed, each part of the test piece was examined for any abnormalities such as damage, looseness, and deformation that hindered its use.

The shelf board according to Example 2 had a measured deflection amount of 6.7 mm.
On the other hand, the shelf board according to Comparative Example 3 had a measured deflection amount of 9.8 mm. Further, the shelf board according to Comparative Example 4 had a measured deflection amount of 6.5 mm.
As for the shelf board according to Example 2, the shelf board according to Comparative Example 3, and the shelf board according to Comparative Example 4, no abnormality was observed in each part of the test body after the test was completed.

From the results of the above deflection test, the shelf board manufactured by using the structure of the present invention has higher strength against a load from above than the feather core (paper core) and is equivalent to an aluminum core (aluminum lattice) having a high density. It was confirmed that it has the strength of.

The present invention is industrially useful because it can be used as a core material for building panel members such as shelf boards and soundproof panels.

1 Structure 1'Structure 10 1st Cross Plate (5th'Cross Plate)
12 2nd cross plate 14 3rd cross plate (1st'cross plate)
16 4th cross plate 18 5th cross plate 20 Upper plate part 22 Lower plate part 24 Right plate part 26 Left plate part 28 Central axis 30 2nd'Cross plate 32 3'Cross plate 34 4'Cross Shape plate 36 5'Cross plate 38 Building panel member 40 Long frame material 42 Long frame material 44 Short frame material 46 Short frame material 48 Building panel member 50 Sheet material

Claims (10)

It is a structure having a structural part in which the second cross-shaped plate to the fifth cross-shaped plate having the same shape are arranged around the first cross-shaped plate.
Each of the first cross-shaped plate to the fifth cross-shaped plate is composed of four rectangular plates, which are erected with the long side surface of the rectangular plate as the bottom surface, and one short side of each of the four rectangular plates is assembled. A cross consisting of an upper plate portion, a lower plate portion, a right plate portion, and a left plate portion is formed around the central axis formed by the above plate.
The center of the second cross-shaped plate is half the length from the center of the first cross-shaped plate, the length of the long side of the plate above, and the length of the long side of the plate plus the thickness of the plate to the right. It is arranged at a position separated by the length obtained by adding the thickness, and the upper side surface of the upper plate portion of the first cross-shaped plate is in contact with the lower surface of the left plate portion of the second cross-shaped plate, and the first The upper surface of the right plate portion of the 1-cross-shaped plate and the lower side surface of the lower plate portion of the second cross-shaped plate are brought into contact with each other.
The center of the 3rd cross-shaped plate is from the center of the 1st cross-shaped plate to the length of the long side of the plate on the right, and the length of the plate is half the length of the long side of the plate plus the thickness of the plate below. It is placed at a position separated by the length obtained by adding the thickness, and the right side surface of the right plate portion of the first cross-shaped plate and the left surface of the upper plate portion of the third cross-shaped plate are in contact with each other and the first The right surface of the lower plate portion of the 1-cross-shaped plate and the left surface of the left plate portion of the 3rd cross-shaped plate are in contact with each other.
The center of the 4th cross-shaped plate is half the length of the long side of the plate below the center of the 1st cross-shaped plate, and the length of the long side of the plate plus the thickness of the plate on the left. It is arranged at a position separated by the length added to the thickness, and the lower side surface of the lower plate portion of the first cross-shaped plate is in contact with the upper surface of the right plate portion of the fourth cross-shaped plate, and the first The lower surface of the left plate portion of the 1-cross-shaped plate and the upper side surface of the upper plate portion of the 4th cross-shaped plate are brought into contact with each other.
The center of the 5th cross-shaped plate is half the length of the long side of the plate on the left and the thickness of the plate added to the long side of the plate from the center of the 1st cross-shaped plate. It is placed at a position separated by the length obtained by adding the thickness, and the left side surface of the left plate portion of the first cross-shaped plate and the right surface of the lower plate portion of the fifth cross-shaped plate are in contact with each other and the second 1 A structure characterized in that the left surface of the upper plate portion of the cross-shaped plate and the right surface of the right plate portion of the fifth cross-shaped plate are in contact with each other. At least one of the second to fifth cross plates is the first cross plate, and the second'to fifth'cross plates having the same shape are arranged around the first cross plate. The structure according to claim 1. The structure according to claim 1 or 2, wherein the structure is made of a vegetable-derived resin. The structure according to claim 3, wherein the plant-derived resin is polylactic acid (PLA). The structure according to any one of claims 1 to 4, wherein the structure is integrally formed by a 3D printer. The structure according to any one of claims 1 to 5, wherein the structure is a core material of a building panel member. A building panel member comprising the structure according to any one of claims 1 to 6 as a core material. The building panel member according to claim 7, which is a shelf board. The building panel member according to claim 7, wherein the panel is a soundproof panel. The building panel member according to claim 7, wherein the louver is a light-shielding louver.

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