JPH08238699A - Honeycomb sandwich panel - Google Patents

Abstract

PURPOSE: To provide the excellent strength and external appearance and to effectively position and hold the entirety by disposing reinforcing parts at both end faces along the cell axial direction, and covering the outer periphery with a surface material. CONSTITUTION: The outer periphery of a honeycomb core 3 with a surface plate 4 and a reinforcing part 10 is covered with a surface material 11. That is, the material 11 is formed by connecting the plate 4 connected to both opening end faces of the core 3 of a pore material in the cell axial direction A and the part 10 connected to both ends 6 along the cell axial direction A of the core 1 of the core material to the outer surfaces with adhesive or the other. Thus, the outer periphery of a honeycomb sandwich panel 9 is covered. Accordingly, even if it receives an impact load from the direction perpendicular to the direction A, the bent, collapse or damage of a cell wall 5 of the core 3 is prevented by the part 10, and the damage to the cell 2 is avoided as well.

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 plates are joined to both opening end faces of a honeycomb core and which is widely used as various structural materials and the like.

[0002]

2. Description of the Related Art FIG. 4 is used for explaining a honeycomb panel of this type of conventional example, and (1) is a plan view of the honeycomb core.
(2) is a perspective view of the main part of the honeycomb core, (3) is a perspective view of the main part of the honeycomb panel, (4) is a front view of the main part of the honeycomb panel, and (5) is a girder. The front view of the usage example as a material, (6) figure is an exploded front view of the usage example which covers a protective sheet. The honeycomb sandwich panel 1 includes a honeycomb core 3 that is a planar aggregate of hollow columnar cells 2 that is a core material, and a surface plate 4 that is bonded to both open end faces of the honeycomb core 3 in the cell axial direction A. Each cell 2 is
It is defined by the cell wall 5. That is, as shown in FIG. 4 (1), the honeycomb core 3 is used after being cut to a predetermined width at a cutting line B, which is manufactured in a fixed length. 2) In addition to the state shown in FIG. 4, as shown in FIG. 4 (3), it is often used as a honeycomb sandwich panel 1 in which the surface plates 4 are joined to both open end faces of the cell 2. In the figure, 6 shows an end face of the honeycomb core 3 of such a honeycomb sandwich panel 1 along the cell axial direction A. The end face 6 is a cut face along the cutting line B and the opening of the cell 2 is shown. It is also a surface orthogonal to the end surface.

[0003]

By the way, the following problems have been pointed out in such a conventional example. First of all, in the conventional honeycomb sandwich panel 1, since the cell wall 5 of the end face 6 along the cell axis direction A of the honeycomb core 3 as the core material is exposed to the outside, a problem occurs in strength. There was an occasion. That is, when used as a product, for example, as shown in FIG. 4 (4), an impact load P or the like is applied from the direction orthogonal to the cell axial direction A toward the end surface 6 of the honeycomb core 3 as a core material. When it is received, the cell walls 5 are easily bent, crushed, and damaged, and the cells 2 are easily damaged. Therefore, problems occur in the rigidity and strength in the cell axial direction A, which are the characteristics of the honeycomb sandwich panel 1, that is, the honeycomb core 3. However, it was pointed out that the compressive strength and shear strength were uncertain. In particular, when the honeycomb sandwich panel 1 is used as a girder or a beam having a length longer than the width or the height in the cell axis direction A, such a problem of strength becomes remarkable and the honeycomb core 3 It was also pointed out that there were problems such as the overall folding, rolling, and rolling.

As an example of such a case, as shown in FIG. 4 (5), when the honeycomb sandwich panel 1 is used as a girder material under the pallet body 7, for example, an impact is caused by a fork claw such as a forklift. It can be cited that the cell wall 5 of the honeycomb core 3 is bent, crushed, or damaged due to the load P (in the illustrated example, the pallet body 7 also serves as the upper surface plate 4 of the honeycomb sandwich panel 1). . By the way, as a measure for such strength,
For example, as shown in FIG. 4 (6), the protective sheet 8 has been attached and covered on the end face 6 of the honeycomb sandwich panel 1, and the like.
Has a lot of problems such as being troublesome to mount, poor in mounting stability, and easily torn under impact load P when repeatedly used.

Secondly, similarly, in the conventional honeycomb sandwich panel 1, since the cell wall 5 of the end face 6 along the cell axial direction A of the honeycomb core 3 as the core material is exposed to the outside, it looks good. It has been pointed out that there is a problem in terms of appearance such that it cannot be used as a decorative plate. Although the protective sheet 8 described above was sometimes used as a measure for such an appearance, the protective sheet 8 had many drawbacks as described above.

In view of the above situation, the present invention has been made to solve the problems of the above-mentioned conventional example, in which auxiliary portions are arranged on both end faces along the cell axial direction and the outer periphery is surfaced. By covering with a material, firstly it is intended to propose a honeycomb sandwich panel which is excellent in strength first, secondly also excellent in external appearance, and thirdly, which is surely positioned and held as a whole. To do.

[0007]

The technical means of the present invention for achieving this object is as follows. That is, in this honeycomb sandwich panel, a surface plate is bonded to both open end faces in the cell axis direction of a honeycomb core formed of a planar aggregate of hollow columnar cells as a core material. Further, reinforcing parts made of cardboard, auxiliary honeycomb sandwich panel, etc. are joined to both end faces along the cell axial direction, and the outer periphery including the reinforcing parts is made of a surface material made of cardboard, cardboard, or the like. Are joined and covered.

[0008]

Since the present invention comprises such means, it operates as follows. This honeycomb sandwich panel
On both open end faces in the cell axis direction of the honeycomb core, which is the core material,
A surface plate is joined, and further, reinforcing portions are joined and arranged on both end faces along the cell axial direction, and a surface material is joined and covered on an outer periphery including the reinforcing portion.
Therefore, firstly, in this honeycomb sandwich panel, since both end surfaces along the cell axis direction of the honeycomb core are reinforced by the reinforcing portions, even when a shock load or the like is applied from a direction orthogonal to the cell axis direction. The cell wall of the honeycomb core is prevented from being bent, crushed, damaged, etc., and is particularly excellent in strength.

Secondly, since the outer periphery of the honeycomb sandwich panel is covered with the surface material, the cell walls on the end faces along the cell axis direction of the honeycomb core are not exposed to the outside,
Excellent appearance. Thirdly, since the outer periphery of the honeycomb sandwich panel is covered with the surface material and bonded, the honeycomb core and the reinforcing part are arranged by bonding the reinforcing parts to both end faces of the honeycomb core. The space is surely positioned and the whole shape is surely retained.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. FIG. 1 (1) is the first of the present invention.
1 is a front view of the embodiment, FIG. 1 (2) is a plan view of the first embodiment, and FIG. 2 is an exploded perspective view of the first embodiment. FIG. 3 (1) is a perspective view of the surface material of the second embodiment, and FIG. 3 (2).
FIG. 3 is a front view of the third embodiment, FIG. 3 (3) is a perspective view of the reinforcing portion of the fourth embodiment, and FIG. 3 (4) is an exploded front view of the reinforcing portion and surface material of the fifth embodiment. 3 and (5) of FIG. 3 are perspective views of the same.

In this honeycomb sandwich panel 9, surface plates 4 are joined to both open end faces in the cell axial direction A of a honeycomb core 3 made of a planar assembly of hollow columnar cells 2 as a core material. Further, reinforcing parts 10 made of cardboard, auxiliary honeycomb sandwich panel, etc. are joined and arranged on both end surfaces 6 along the cell axial direction A, and the outer periphery including the reinforcing parts 10 is made of cardboard, cardboard, etc. A surface material 11 made of is bonded and covers.

Such a honeycomb sandwich panel 9
Will be described in more detail. First, the honeycomb core 3, which is a core material, is composed of a planar aggregate of a large number of hollow columnar cells 2, each of which is divided into independent spaces by cell walls 5. The cross-sectional shape of the cell wall 5 and the cell 2 is typically the regular hexagonal shape shown in the figure, but trapezoidal, triangular, quadrangular, and other various shapes are also possible. The cell wall 5, that is, the base material of the honeycomb core 3, is a metal foil such as aluminum foil, a cellulose fiber sheet, a mixed sheet of cellulose fibers and organic fibers, a mixed sheet of cellulose fibers and inorganic fibers or inorganic materials, and other pulp. Composite sheet including
An organic fiber sheet, a film sheet of various thermoplastics, a fiber reinforced plastic (FRP) sheet, or a sheet of various materials is used. As the fiber reinforced plastic sheet, glass fiber, Kevlar fiber, carbon fiber, composite fiber of these, and various other fibers, and phenol resin and other thermosetting resin or thermoplastic resin are adhered, impregnated and mixed. A typical one is a combination of the above. The honeycomb core 3 has an excellent weight ratio strength, is lightweight, and has high rigidity and strength, is excellent in plane accuracy, heat retention, heat insulation, sound insulation, and rectification effect, and has a surface area per unit volume. The characteristics of being large, etc. are known.

Next, the surface plate 4 is an aluminum plate or other metal plate, various fiber plates, pulp-containing composite material plate, melamine resin plate or other plastic plate, ceramic plate,
A carbon plate, a fiber reinforced plastic (FRP) plate, and a plate made of various materials similar to the base material of the honeycomb core 3 described above are used. The surface plate 4 has the above-described honeycomb core 3 as a core material, and is bonded to both open end faces of the cells 2 in the cell axis direction A with an adhesive or the like.

In this honeycomb sandwich panel 9, the surface plate 4 is joined to both opening end faces (upper and lower end faces in the drawing) of the honeycomb core 3 as the core material in the cell axial direction A as described above. At the same time, first, the reinforcing portion 10 is commonly joined to both end surfaces 6 (left and right end surfaces in the drawing) of the honeycomb core 3 along the cell axial direction A and the end edges of the surface plate 4. (In the illustrated example, the reinforcing portion 10 is not provided on the front and rear end faces 12 along the cell axial direction A of the honeycomb core 3.) The reinforcing portion 10 has a height and a length C in the cell axial direction A. The two surface plates 4 are aligned with the bonded honeycomb core 3 and are bonded to the left and right sides of the drawing using an adhesive or the like.

As such a reinforcing portion 10, as shown in FIGS.
In the first embodiment, a multilayer corrugated cardboard is used, and in the third, fourth and fifth embodiments shown in FIGS. 3B, 3C, 3D and 3D, the auxiliary honeycombs are used. Although the core is used, as the reinforcing portion 10, foamed plastic or other various materials can be used in addition to the cardboard and the auxiliary honeycomb core. In addition, the reinforcing portion 1
The auxiliary honeycomb core used as 0 may be the same as the honeycomb core 3 which is the core material described above, that is, the same material, foil thickness, cell shape, etc., but different in material, foil thickness, cell shape, etc. May be used. Also, FIG.
In the third embodiment of FIG. 3 (2), the reinforcing portion 10 made of the auxiliary honeycomb core having two layers on the left and right sides is used.
In the fourth and fifth embodiments of FIGS. 4 (4) and 5 (5), the reinforcing portions 10 made of one layer of auxiliary honeycomb core are used for both the left and right sides. The auxiliary honeycomb core used as the reinforcing portion 10 is arranged laterally in a relationship in which the cell axial direction A is orthogonal to the honeycomb core 3 which is the core material described above ((2) in FIG. 3).
See figure).

In this honeycomb sandwich panel 9, the outer periphery of the surface plate 4 and the honeycomb core 3 with the reinforcing portion 10 is thus covered with the surface material 11.
That is, the surface material 11 includes the surface plate 4 joined to both opening end surfaces (upper and lower end surfaces in the drawing) of the core material honeycomb core 3 in the cell axial direction A, and along the cell axis direction A of the core material honeycomb core 3. Further, the reinforcing portions 10 joined to both end faces 6 (left and right end faces in the drawing) are joined to their outer surfaces with an adhesive or the like, thus covering the outer periphery of the honeycomb sandwich panel 9. (In the illustrated example, the front and rear end face sides of the honeycomb core 3 along the cell axis direction A are not covered with the surface material 11.) Such a surface material 11 may be a single layer or the like. Thin cardboard, cardboard, and other various sheet materials are used.

In the honeycomb sandwich panel 9 of the first embodiment shown in FIGS. 1 and 2, the surface material 11 is a single-layer corrugated cardboard which is divided into upper and lower two sheets and is bent. The outer periphery of the honeycomb core 3, which is the core material, is covered with the surface plate 4 and the reinforcing portion 10. Further, in the second embodiment of FIG. 3A, the surface material 11 is
A single-layer corrugated cardboard that is bent without division is used. In the third embodiment of FIG. 3 (2), as the surface material 11, cardboard which is divided into two pieces at the top and bottom and is bent is used. Figure 4 (4),
(5) In the fifth embodiment shown in the figure, the surface material 11 made of cardboard and the auxiliary honeycomb sandwich panel 1
After the joined portion of the reinforcement portion 10 of the layer is prepared,
The surface material 11 is bent and joined to the honeycomb core 3 as a core material. In the fifth embodiment, the upper flat plate-like surface material 11 is not shown in the drawing, but of course, such an upper flat plate-like surface material 11 is used depending on the product. On the other hand, such a honeycomb sandwich panel 9 in which the upper flat plate-like surface material 11 does not exist and the outer periphery is covered only by the lower surface material 11 is also possible.

Now, this honeycomb sandwich panel 9
Is provided with such a reinforcing portion 10 and a surface material 11 as well as a honeycomb core 3 and a surface plate 4 which are core materials. And
The honeycomb sandwich panel 9 has various characteristics of the honeycomb core 3 described above, and also has particularly high weight ratio strength and high rigidity / strength as described later. Therefore, the honeycomb sandwich panel 9 takes advantage of such characteristics, and is a structural material for construction, construction, fittings, structural material such as various containers, boxes and containers, structural material for aircraft, space equipment, communication equipment and the like. It is also widely used for various purposes such as various structural materials.

FIG. 5 shows an example of use of such a honeycomb sandwich panel 9, where (1) is a front view of an example of use as a girder material, and (2) is a use as a sleeper. An example front view, (3) figure is a perspective view of a use example as a beam, and (4) figure is a front view of a use example as a frame. First, in FIG. 5 (1), a honeycomb sandwich panel 9 is used as a girder material attached below the pallet body 7, and a fork claw such as a forklift is inserted between the honeycomb sandwich panels 9. In FIG. 5 (2), the honeycomb sandwich panel 9 is used as a sleeper for preventing the central roll and the drum 13 from moving, and is fixed on the immovable portion so as to sandwich the roll and the drum 13 from the left and right. ing. In FIG. 5 (3), a honeycomb sandwich panel 9 used as a beam for construction and construction is shown. FIG. 5 (4) shows a honeycomb sandwich panel 9 used as a frame of a door 14 for fittings, for example.

The present invention is constructed as described above. Then it becomes as follows. This honeycomb sandwich panel 9 is formed by joining surface plates 4 to both opening end faces of the core material honeycomb core 3 in the cell axial direction A, and further reinforcing both end faces 6 along the cell axial direction A. Part 1
0 is joined and arranged, and the surface material 11 is joined and covers the outer periphery including the reinforcing portion 10. Then, in this honeycomb sandwich panel 9, the following first, second, and third are performed.

First, in this honeycomb sandwich panel 9, both end faces 6 along the cell axis direction A of the honeycomb core 3 as a core material are reinforced by the joined reinforcing portions 10. Therefore, even when an impact load P or the like (see (4) of FIG. 4) is applied from the direction orthogonal to the cell axis direction A, the bending of the cell wall 5 of the honeycomb core 3 is prevented by such a reinforcing portion 10. Crushing, damage, etc. are prevented, damage to the cells 2 is also avoided, and the rigidity and strength in the cell axial direction A are excellent, and the strength is particularly excellent.

Secondly, the honeycomb sandwich panel 9 has an outer periphery covered with a surface material 11, and both end surfaces 6 of the honeycomb core 3 along the cell axial direction A are also reinforced by the reinforcing portions 10. It is covered with the surface material 11. Therefore,
The honeycomb sandwich panel 9 is excellent in external appearance, such that the cell walls 5 on both end surfaces 6 of the honeycomb core 3 along the cell axial direction A are not exposed to the outside.

Thirdly, the honeycomb sandwich panel 9 has reinforcing portions 1 on both end faces 6 of the honeycomb core 3 for reinforcement.
0 is joined and arranged, but the entire outer circumference is surface material 1
Since the honeycomb core 3 and the reinforcing portion 10 are covered with and bonded to each other, the positioning is surely performed.
Therefore, the honeycomb sandwich panel 9 is surely held in its overall shape as expected, regardless of having the reinforcing portion 10.

[0024]

As described above, the honeycomb sandwich panel according to the present invention is provided with the reinforcing portions on both end faces along the cell axis direction, and the outer periphery is covered with the surface material. Be effective.

First, the strength is excellent. That is,
This honeycomb sandwich panel is reinforced by the reinforcing portion, and since the cell wall of the end face along the cell axis direction of the honeycomb core is not exposed to the outside, the impact load is applied from the direction orthogonal to the cell axis direction of the honeycomb core. Even when the cell wall is damaged, the cell wall is prevented from being bent, crushed, damaged, and the like, and cell damage is also avoided. Therefore, unlike the above-mentioned conventional example of this kind, there is no concern about the rigidity and strength in the cell axial direction, and the compressive strength and shear strength are excellent. Therefore, this honeycomb sandwich panel does not cause a problem of strength even when it is used as a girder or a beam whose length is particularly long compared to its width and height, and the honeycomb core does not have an overall bending or lateral bending. Tipping and rolling are also prevented.

Secondly, the external appearance is also excellent. That is, this honeycomb sandwich panel is covered with the surface material, the cell wall of the end face along the cell axial direction of the honeycomb core is not exposed to the outside, so that the appearance is better than that of the above-mentioned conventional example. Well used as a decorative board, etc.
Excellent appearance.

Thirdly, the overall shape is reliably positioned and held. That is, since this honeycomb sandwich panel is covered with the surface material and bonded, the honeycomb core and the reinforcing portion are reliably positioned and the overall shape is also reliably retained. 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]

1 shows a first embodiment of a honeycomb sandwich panel according to the present invention, FIG. 1 (1) is a front view and FIG. 2 (2) is a plan view.

FIG. 2 is an exploded perspective view of the first embodiment.

3A and 3B show essential parts of another embodiment, FIG. 1A is a perspective view of the surface material of the second embodiment, FIG. 2B is a front view of the third embodiment, and FIG. , A perspective view of a reinforcing portion of the fourth embodiment, (4)
The figure is an exploded front view of the reinforcing portion and the surface material of the fifth embodiment,
(5) The figure is the same perspective view.

FIG. 4 is used for explaining a honeycomb sandwich panel of this type of conventional example, (1) is a plan view of the honeycomb core,
(2) is a perspective view of the main part of the honeycomb core, (3) is a perspective view of the main part of the honeycomb panel, (4) is a front view of the main part of the honeycomb panel, and (5) is a girder. The front view of the usage example as a material, (6) figure is an exploded front view of the usage example which covers a protective sheet.

[Fig. 5] Fig. 5 shows various usage examples of the honeycomb sandwich panel as a structural material, Fig. 1 (1) is a front view of the usage example as a girder material, and (2) is a front view of the usage example as a sleeper.
(3) is a perspective view of a use example as a beam, (4) is
It is a front view of an example of use as a frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Honeycomb sandwich panel (conventional example) 2 Cell 3 Honeycomb core 4 Surface plate 5 Cell wall 6 End face 7 Pallet body 8 Protective sheet 9 Honeycomb sandwich panel (this invention) 10 Reinforcing part 11 Surface material 12 Front and rear end face 13 Roll And drum 14 Door A Cell axial direction B Cutting line C Length P Impact load

Claims (1)

[Claims] 1. A honeycomb core formed of a planar aggregate of hollow columnar cells as a core material, on both end faces of openings in the cell axial direction,
A honeycomb sandwich panel in which surface plates are respectively joined, and reinforcing portions made of cardboard, an auxiliary honeycomb sandwich panel, etc. are joined and arranged on both end surfaces along the cell axis direction, and the reinforcing portions are included. A honeycomb sandwich panel, characterized in that the outer periphery is joined and covered with a surface material such as cardboard or cardboard.