JPS59192554A - Honeycomb structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a honeycomb core structure suitable for use as a core material of a honeycomb panel.

[Prior art]

As shown in Figure 1, conventional honeycomb core structures include vapor, aluminum, glass IBM reinforced plastic (FRP), and carbon reinforced plastic (C).
It is well known that a honeycomb-shaped core material (honeycomb core) 100 is formed of a material such as FRP, and above and below this honeycomb core 100 are made of wood plywood, aluminum, steel plate, CFR, etc.
A honeycomb panel was formed by bonding skin layers 101 and 102 made of P or the like. In the honeycomb core 100 having such a structure, the contact with the skin layers 101 and 102 is a linear contact, so the bonding area is small, resulting in a large loss of adhesive in the bonding process, and furthermore, the reliability of bonding strength is lacking. point was the problem.

In particular, if the reliability of the adhesive strength is poor, when a bending load is applied to this honeycomb panel, the honeycomb core 100
The adhesive surface will not be able to withstand the large shearing force that occurs near the boundary between the skin and the skin l'1101/102 and will peel off, damaging the honeycomb panel's characteristics of lightness and high rigidity.
There was a demand for something with highly reliable adhesive strength. By the way, as a core that has been improved from linear adhesion to @adhesion between the core and skin, Cuspa, which targets thermoplastic resins,
Although there is a tion method, it is difficult to form a complex shape with high precision using this method, and there are concerns about warping and twisting of the core. Another drawback was that the material was limited to thermoplastic resin.

[Purpose of the invention]

This invention was invented in view of the circumstances in the article, and aims to improve the reliability of the adhesive strength with the skin layer of plywood, etc., eliminate adhesive loss, and facilitate the work of bonding the skin layer. The skin layer peels off even under bending loads.
The purpose of this invention is to provide a honeycomb core structure that can sufficiently prevent the above problems.

[Structure of the invention]

In order to achieve the above object, the present invention includes forming a plurality of bottomless convex portions having a flat top surface on the upper surface and having a hollow interior at regular intervals, and The space above the base that exists between adjacent convex parts in any one of the vertical, horizontal, and diagonal directions or in two or more of these directions is made into a volume sufficient to accommodate the volume of the convex parts upside down. At least two core sheets having a plurality of convex portions cut into predetermined dimensions are prepared, and these two core sheets are placed facing each other and the top surfaces of the convex portions are adhered to each other, or one of the convex portions is is inserted into the space between the other protrusions, and the top surface and base of the protrusion are bonded together.

[Embodiments of the invention]

Some preferred embodiments of the present invention will be described below with reference to the drawings of FIGS. 2 to 18.

FIG. 2 shows an example of the core sheet 1 that is the basis of the honeycomb core structure of the present invention. This core sheet 1
A plurality of convex portions 2 having flat top surfaces 2a are formed on the upper surface at regular intervals, and a ring-shaped enclosure is formed at the base portion 3 between the convex portions 2 adjacent to each other in the vertical and horizontal directions. 4
By forming the concave portion 5 in the surrounding portion 4. In this first embodiment, the convex portion 2 is hollow inside and shaped like a truncated cone without a bottom, and the head of the convex portion 2 fits into the four portions 5. It is formed to be large enough for the purpose. Further, the convex portions 2 and the concave portions 5 are arranged in a staggered manner, and two sheets of such core sheet 1 cut into predetermined dimensions are prepared.See FIGS. 3 and 4.
1(a) and 1(b)), these two core sheets 15-<a> and 1(+1> are made to face each other, and the convex portion 2 of one is fitted into the four portions 5 of the other and adhered. This forms a capsule-shaped honeycomb core 10 (see Figures 5 and 6).To one core sheet 1 (a) and to the other core sheet 1 (b).
This means that the top surface 2a and the fourth part 5 are in surface contact, and the peripheral surface of the head of the convex part 2 and the inner peripheral surface of the enclosure part 4 are in surface contact, adhesive is applied to these surface contact parts, and both Sheet 1(a)・1(+))
will be firmly bonded. Of course, there is little loss of adhesive, and the adhesive is applied to the areas to be bonded in just the right amount. In this way, 2 pieces = 1 Acy 1~1
After forming the honeycomb core 10 from (a) and 1(b),
A honeycomb panel can be formed by pasting skin layers 6 and 7 made of plywood or the like on both sides. The skin layers 6, 7 and the honeycomb core 10 are brought into contact with each other at the bonding surfaces shown by reference numeral 8 in FIG. 6, and are not in line contact as in the prior art but in surface contact, thereby achieving strong adhesion.

In FIG. 8, two core sheets 1 identical to those used in the first embodiment shown in FIGS. This is a honeycomb core 10 in which the top surfaces 2a of the honeycomb core 10 are bonded together, and shows a second embodiment of the present invention. This second embodiment is approximately twice as thick as the first embodiment.

The honeycomb core 10 can be shaped as appropriate depending on the material, thickness, etc. of the skin layers 6 and 7 used, or the intended use.

FIG. 9 shows a core sheet 1 used in a honeycomb core 10 whose dimensions are shown in FIG. 10 and below according to the third embodiment. 5'. The four parts 5' located at a high position are surrounded by a surrounding part 4'. The top surfaces 2a of the convex portions 2 are at the same height.

FIG. 10 shows a third embodiment of the present invention, in which two core sheets 1 shown in FIG. 9 are prepared, and these two core sheets 1 are
~1.1 are placed opposite each other, and the convex portion 2.6 of one is fitted into the concave portion 5 of the other. FIG. 11 shows a fourth embodiment of the present invention, in which one convex portion 2 is fitted into the other concave portion 5'. FIG. 12 shows a fifth embodiment of the present invention, in which the top surfaces 2a of the protrusions 2 are butted and bonded together. These third to fifth
The embodiment shows an example in which two identical core sheets 1 are used and the height of each honeycomb core 10 can be adjusted to three levels. In addition, these honeycomb cores 1
Although not shown, skin layers 6 and 7 as shown in FIG. 7 can be formed on both sides of the honeycomb panel 0 to form a honeycomb panel.

In each of the embodiments described above, the recess 5 or 5' is formed in the core sheet 1.
Although these are formed in the base portion 3 existing between the convex portions 2, 2, the present invention also includes those in which the concave portions 5, 5' and the surrounding portions 4, 4' are not formed. That is, even without forming the surrounding part 4 (4') or the fourth part 5 (5'), the vertical,
The space above the base that exists between the convex portions 2 and 2 adjacent to each other in one of the horizontal and diagonal directions, or in two or more of these directions, is made into a volume that can receive the volume of the convex portion 2 upside down. Formation J- alone is sufficient. This is shown in FIG. 13 as a sixth embodiment.

Further, the shape of the convex portion 2 is not limited to the truncated trapezoidal shape, but various shapes can be considered. For example, Figures 14 to 16
Triangular prism, quadrangular prism, hexagonal prism shapes, etc. can be adopted as shown in each of the figures (a).

The interiors of these convex portions 2 are all hollow and bottomless. Four parts 5 for receiving the heads of these convex parts 2
The shape corresponds to the shape of each convex portion 2 as shown in (b) of FIGS. 14 to 16, respectively.

Furthermore, although the recessed portion 5 (5') is formed by forming the surrounding portion 4 (4') in which the base portion 3 of the core sheet 1 is raised, such a surrounding portion 4 (4') is not necessarily formed.
It goes without saying that there is no problem even if you do not rely on it.

Note that as the material of the core sheet 1, paper, aluminum, FRP, CFRP, thermoplastic resin, etc. can be used. Furthermore, in the above embodiment, two core sheets were combined, but it is also possible to combine three or more core sheets.

Further, the shape of the above-mentioned convex portion 2 is such that its head is formed in two stages as shown in FIG. The top surface 2a- of the lower tier J is in surface contact with the other top surface 2a' as shown in FIG.

〔Effect of the invention〕

As explained above, according to the present invention, a plurality of bottomless convex portions each having a flat top surface and a hollow interior are formed at regular intervals on the upper surface of the core sheet, and vertically The space above the base that exists between adjacent convex portions in one of the horizontal and diagonal directions, or in two or more of these directions, is formed into a volume sufficient to receive the volume of the convex portions upside down. At least two core sheets having a plurality of convex portions are cut into predetermined dimensions, and these two core sheets are placed facing each other and the top surfaces of the convex portions are adhered to each other, or the convex portions of one are attached to the other. Because it is a capsule-shaped honeycomb core that fits into the space between the convex parts and adheres the top surface and base of the convex parts, it can absorb warping and twisting of each core sheet alone, and has excellent dimensional stability. There is. Also,
Because it uses a surface adhesion method, the reliability of not only the adhesive strength between the core sheets but also the adhesive strength with the skin layer is improved, and there is no loss of adhesive. Further, in a honeycomb panel using this honeycomb core, even when subjected to a bending load, peeling phenomenon can be prevented against shearing force generated near the outer surface of the honeycomb core (near the boundary with the skin layer). Furthermore, according to the present invention, when manufacturing a honeycomb core, depending on the use of the honeycomb panel, the required quality, etc., the core thickness that contributes most to the rigidity of the honeycomb panel is selected from the same material, for example, two sheets of paper. It is extremely easy to select two or more. That is, in the present invention, it is possible to greatly change the thickness and rigidity of the honeycomb panel using honeycomb cores of the same weight.

Furthermore, in the honeycomb core structure according to the present invention, when a honeycomb panel is created using the honeycomb core structure as a core material, a continuous space exists on the entire surface of the panel, so if gas, fluid, etc. is introduced into this space, It can also be used as a panel for various air conditioning and solar energy-related applications. For example, as a core material for roofing and ceiling materials that also serve as solar heat collectors.
It can be used as a core material for balcony flooring, as a core material for wall materials, etc., and can also be used for indoor floor heating, wall heating, etc. Incidentally, it is also possible to insert heat insulating material into the continuous space to create a heat insulating panel.

In the case where four parts are formed, the core seams 1 to 1 can be easily bonded together and positioning can be achieved reliably. If this concave part is formed by forming a surrounding part, this surrounding part holds the circumference of the head of the convex part, and due to the sealing effect of the convex part by the surrounding part, peeling occurs against bending load. can be sufficiently prevented. Furthermore, in the case of having four parts of two or more scales, and the heights of these recesses are different, a honeycomb core structure with three or more types of thickness using the same core seams 1 to 1 with the same number and the same amount of iT2. can be easily manufactured.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing a typical conventional honeycomb core structure, Fig. 2 is a perspective view showing an example of a core sheet used in the present invention, and Figs. 3 and 4 are fitted and bonded. FIG. 5 is a cross-sectional view showing the method of adhering the core sheet shown in FIGS. 3 and 4, and FIG. 7 is a sectional view showing the honeycomb core structure of the first embodiment, FIG. 7 is a sectional view of a honeycomb panel using the honeycomb core structure shown in FIG. 6, and FIG. 8 is a cross-sectional view of the honeycomb panel shown in FIG. FIG. 9 is a sectional view showing an example of the core sheet, and FIGS. 10 to 12 show third to fifth embodiments using the core sheet shown in FIG. 9. Cross-sectional view shown, No. 13
The figure is a cross-sectional view showing the sixth embodiment, (a) and (b) of FIGS. 14 to 16 are perspective views showing modified examples of the convex part and the surrounding part, respectively, and FIG. 17 is a modified example of the convex part. A cross-sectional view showing
FIG. 18 is a sectional view showing an example of the fitted state of the core sheets shown in FIG. 17. 1...Core sheet, 2...Protrusion, 2a...Top surface, 3...
...Base, 10...Honeycomb core. =13- Fig. 4 Fig. 3 Fig. 4 Fig. 43 Scratch Fig. 46

Claims (1)

[Claims] 1. A plurality of bottomless convex portions each having a flat top surface and a hollow interior are formed at regular intervals on the upper surface of the core sheet, and vertically, horizontally, and diagonally on the core sheet. The space above the base that exists between adjacent convex portions in any one of the directions or in two or more of these directions is a volume sufficient to receive the volume of the convex portions upside down. At least two core sheets having a plurality of convex portions are cut to a predetermined size are prepared, and these two core sheets are placed facing each other and the top surfaces of the convex portions are adhered to each other, or one of the convex portions is 1. A capsule-shaped honeycomb core structure characterized in that a top surface of a convex part and a bottom part of one convex part are bonded together by fitting one part into a space between two convex parts. 2. The top surface of the convex part fits into the base part existing between the convex parts.
2. The honeycomb core structure according to claim 1, further comprising one or more recesses formed therein. 3. The honeycomb core structure according to claim 2, characterized in that the four parts are surrounded by a surrounding part whose base part is raised in a shape corresponding to the shape of the top surface of the convex part. . 4. The honeycomb core structure according to claim 2 or 3, characterized in that the heights of the two or more recesses are set equal to each other.