CA2239532A1 - High-rigidity panel - Google Patents
High-rigidity panel Download PDFInfo
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- CA2239532A1 CA2239532A1 CA002239532A CA2239532A CA2239532A1 CA 2239532 A1 CA2239532 A1 CA 2239532A1 CA 002239532 A CA002239532 A CA 002239532A CA 2239532 A CA2239532 A CA 2239532A CA 2239532 A1 CA2239532 A1 CA 2239532A1
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- panel
- convex portions
- rigidity
- panels
- panel according
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
- E04C2/34—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts
- E04C2/3405—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by profiled spacer sheets
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
- E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
- E04F13/12—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements of metal or with an outer layer of metal or enameled metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/06—Flooring or floor layers composed of a number of similar elements of metal, whether or not in combination with other material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2311/00—Metals, their alloys or their compounds
- B32B2311/18—Titanium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2471/00—Floor coverings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2607/00—Walls, panels
- B32B2607/02—Wall papers, wall coverings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
- E04C2/34—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts
- E04C2/3405—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by profiled spacer sheets
- E04C2002/3411—Dimpled spacer sheets
- E04C2002/3427—Dimpled spacer sheets with conical dimples
Abstract
A high-rigidity panel having a laminate structure of two or more panels superimposed together, the panels each having a large number of convex portions, the convex portions of each panel being each bonded to one or more convex portions of another such panel. As the material of the panels it is desirable to use steel as a steel plate or such a metallic material as aluminum or titanium. The high-rigidity panel of the invention, because of adoption of such a laminate structure, can exhibit high strength and rigidity against a load applied thereto, despite of lightweight. Thus, the high-rigidity panel of the invention is most suitable for use as a floor or wall surface panel of such a structure as a building structure, an airplane, or a vehicle.
Description
HIGH-RIGIDITY PANEL
FIELD OF THE INVENTION
The present invention relates to a high-rigidity panel of lightweight having a high rigidity to be applied to floor or wall surfaces of such structures as building structures, airplanes and vehicles.
DESCRIPTION OF THE PRIOR ART
Heretofore, as structures for use as panels of such structures as building structures, airplanes and vehicles, those of a honeycomb structure are very popular. Metals are mainly used as a constituent material of a honeycomb structure. The thickness of a metal used for the honeycomb structure is very small, in the range of about 50 ,u m to about 100 ,u m.
However, since the honeycomb structure has the function of dispersing the load applied thereto, the panel of the honeycomb structure has the feature that it is very strong despite of lightweight.
However, for fabricating a panel of such a honeycomb structure, it is necessary to go through many manufacturing steps like ~1 adhesive application ~ ~ plate cutting ~ ~3 laminating ~ ~ pressing -~ 5~
cutting. Besides, due to accumulation of losses in those manufacturing steps, the waste of the structural material used becomes large. Furthermore, from the standpoint of productivity, for example at the time of bonding a honeycomb structural member and surface members to one another, so that the surface members cover both sides of the honeycomb structural member, it is necessary that these members after being cut be fixed at predetermined shape and size during the bonding operation. But such a bonding operation is troublesome, giving rise to the problem that the working afficiency is limited and that the productivity is deteriorated markedly.
For solving the above-mentioned problems involved in the panel of the honeycomb structure, a metallic panel of lightweight having a strength high enough for use as a structure wall panel and superior in productivity is proposed in Japanese Patent Application Laid-Open (kokai) No. 6-316015.
FIG.l is a partially cut-away view in perspective of the metallic panel, proposed in the above patent application. This metallic panel, indicated at 7, comprises a structural member 9 with a large number of convex portions 8 formed thereon and surface members 10 bonded to both sides of the structural member 9. In an intermediate layer 11 of the metallic panel are formed a large number of independent cellular portions 12 and continuous spatial portions 13. Since this metallic panel has a large number of cellular portions in its intermediate layer, it is possible to disperse an applied load as is the case with a panel of the honeycomb structure, and hence the metallic panel can exhibit a high strength against the applied load. In panel manufacture, moreover, it is possible to adopt a simple process comprising the steps of subjecting a thin metallic material, such as aluminum to deep drawing or bulging to form a large number of convex portions, and subsequently bonding a surface material to both sides of the thus processed metallic material. For the proposed metallic panel, however, no consideration is given to its rigidity against flexural deformations. Thus, the metallic panel in question involves the problem that it is markedly deficient in rigidity FIGS.2 and 3 show how the above metallic panel is deformed under the application of a load, of which FIG.2 shows a deformed state of the panel under the application of a distributed load p in a stable state of the whole underside of the panel being supported, and FIG.3 shows a deformed state of the panel under the application of the distributed load p in a both end-supported state of only end portions of the panel underside being supported.
As shown in FIG.2, when the distributed load p is applied to the metallic panel in a stable state of the panel underside, the panel can exhibit a high strength. However, as shown in FIG.3, in a both end-supported state of the panel in which only both end portions of the panel underside are supported, the panel is subjected to bending due to the distributed load p. In this case, since the metallic panel is provided with the convex portions 8 in a separated manner at predetermined constant intervals, the portions of the surface members 10 supported by the convex portions 8 are not deformed, whereas the surface member portions located between adjacent convex portions 8 and not supported by the convex portions are apt to be deformed. Once deformations occur at portions of the surface member 10, the panel as a whole easily undergo flexural deformations, thus giving rise to the problem that the rigidity of the panel is insufficient as a structural product.
OBJECT OF THE INVENTION
For panels to be used as floor or wall surface panels of such structures as building structures, airplanes and vehicles, it is required to exhibit a high rigidity as a structural product so as not to cause flexural deformations irrespective of how the panels are supported and no matter in what state a load may be applied to the panels, in addition to the requirement that the panels should be lightweight.
Taking note of the improvement of rigidity out of the performances required for floor or wall surface panels of a structure, in order to prevent flexural deformations of the panels, the present invention intends to provide a panel having a high rigidity SI:f~IARY OF THE INVENTION
Having made various studies about the rigidity of panels, the present inventors made it clear that in the both end-supported state of the foregoing conventional metallic panel with only end portions of the panel underside being supported, the surface member portions located between adjacent convex portions and not supported by the convex portions are easily subjected to flexural deformations, and that the rigidity of the panel as a whole is deteriorated markedly Having made further studies, the present inventors found out a panel structure in which flexural deformations are diminished even when a load is applied to the panel in the both end-supported state of only both ends of the panel underside being supported. In this way we completed the high-rigidity panel of the present invention.
The gist of the present invention resides in the following panel, an example of which is shown in FIG.4 to be referred to later: "a high-rigidity panel having a laminated structure in which two or more panels each having a large number of convex portions are superimposed together, with the convex portions of each panel being bonded to one or more convex portions of the other panel adjacent thereto."
The "laminated structure" as referred to herein, means a laminated panel structure in which panels each having a large number of convex portions are bonded together through the respective convex portions. The material of the panel according to the present invention is not specially limited. Not only steel but also aluminum (Al) and titanium (Ti) are also employable.
Aluminum and titanium not only ensure the required strength of the panel, but also are more advantageous to the reduction in weight of the panel.
Further, the use of the panel according to the present invention, is not limited to floor or wall surfaces of building structures. The panel of the present invention is also applicable to airplanes and vehicles.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG.1 is a partially cut-away view in perspective of an example of a conventional metallic panel;
FIG.2 shows a deformed state of the conventional metallic panel under the application of a distributed load to the panel in a stable state of the whole panel underside being supported;
FIG.3 shows a deformed state of the conventional metallic panel under the application of a distributed load to the panel in a both end-supported state of only both end portions of the panel underside being supported;
FIG.4 is a partially cut-away view in perspective of a construction example of a high-rigidity panel according to the present invention;
FIG.5 shows a flat top of each convex portion formed on each of constituent panels of the high-rigidity panel according to the present invention; and FIG.6 shows a flat top, with an aperture formed therein, of each convex portion formed on each of constituent panels of the high-rigidity panel according to the present invention.
DESCRIPTION OF PREFERRED EMBODIMENTS
As mentioned above, the reason why the conventional metallic panel is deficient in rigidity, is that flexural deformations occur at the surface member portions located between adjacent convex portions and not supported by convex portions. This is because generally the convex portions exhibit a high resistance to deformations, whereas the surface members are low in their resistance to deformations. In other words, if such deformations of the surface members can be suppressed, it is possible to obtain a panel having a high-rigidity. This condition can be satisfied, if the convex portions of each constituent panel are bonded not only to the associated surface member, but also to the convex portions of another constituent panel. Therefore, if the convex portions that exhibit a high resistance to deformations of the panels, are bonded together, it is possible to suppress deformations under the application of a load to the panels, resulting in that the laminated panel as a whole can exhibit a high-rigidity.
FIG.4 is a perspective view with parts partially cut-away to show an example of construction of a high-rigidity panel according to the present invention. The high-rigidity panel of the present invention, indicated at 1, is of a laminated structure (a laminated panel) comprising two or more panels 3 superimposed together and each having a large number of convex portions 2.
The panels 3 are bonded together through the respective convex portions 2 to constitute a panel laminate 5, and one or both sides of the panel laminate 5 are covered with surface members 4. In this case, the convex portions 2 of each panel 3 are bonded to the convex portions 2 of another panel 3. Therefore, even when a load is applied to the laminated panel in a both end-supported state of only both ends of the panel underside being supported, panel deformations are small and a high-rigidity is ensured as the entire panel structure.
The number of another convex portion to which a specific convex portion is bonded may be at least one. For example, assuming that the panel laminate of the present invention is constituted by two panels A and B, the convex portions of panel A may be bonded respectively to the convex portions of panel B in 1:1 relation, or each of the convex portions of panel A may be bonded to two or more convex portions of panel B and, also when viewed from the panel B side, each of its convex portions may be bonded to two or more convex portions of panel A. The larger number of convex portions of panel B
to which one convex portion of panel A, the more dispersed is the load applied to the A-B panel laminate, so that the resistance to deformation increases and the rigidity of the entire panel structure is enhanced.
FIGS.5 and 6 are perspective views showing examples of convex shapes in the panel laminate of the present invention, with no special limitation being imposed on the shape of convex portion. Usually, each convex portion assumes an inverted bowl shape, as shown in FIGS, the upper end of which is preferably flat to enhance the effective bonding with another convex portion or a surface member. The size and shape of each convex portion may be determined according to the place where the panel structure is to be used, the purpose of use, etc. As shown in FIG.6, the flat top of the convex portion may partially be formed with an aperture for facilitating a molding operation.
Even in this case, there is no fear of deterioration in strength or rigidity of the resulting panel laminate for use, as a floor or wall surface panel in such a structure as a building structure, an airplane, or a vehicle.
The number of constituent panels of the panel laminate according to the present invention, is usually two. However, even where the number of constituent panels is three, for example, A, B and C, if convex portions are formed on one sides of panels A and B, and convex portions are formed on both sides of panel C, and if panels A and B are disposed so that their convex portions are opposed to each other, with panel C being sandwiched in between both panels A and B, the convex portions of panel A are bonded to the convex portions formed on one side of panel C, and at the same time the convex portions of panel B are bonded to the convex portions formed on the other side of panel C. Thus, the number of constituent panels may be three. By increasing the number of constituent panels, it becomes possible to thicken the resulting panel laminate. Besides, not only the dimensional range as a structural material can be widened, but also it is possible to expect the improvement of rigidity and of heat insulating property As described above, the panel laminate of the present invention has a surface member or members, e.g. particle board, on one or both sides thereof.
Like a panel of the honeycomb structure, the panel structure of the present invention exhibits the function of dispersing a load applied thereto. Besides, the panel laminate of the present invention is high in strength, and the convex portions of the constituent panels are bonded together, so it is little deformed and exhibits a high-rigidity as a whole.
As to the material of the high-rigidity panel of the present invention, there is no special limitation. In the case of using steel, there is adopted any of steel plates, various plated steel plates and pre-coated steel plates. As noted previously, other metallic materials may be used such as, for example, aluminum and titanium or various resins may be used. The use of aluminum or titanium not only contributes to the enhancement of rigidity, but also is more advantageous to the reduction in weight of the resulting panel.
For fabricating the high-rigidity panel of the present invention, if a metal is used as the material of the panel, the metal is usually as thin as to 1200,um and is subjected to deep drawing or pressing to form convex portions at predetermined positions, then, for example, two of the panels thus formed are bonded together through the respective convex portions to afford a panel laminate. Next, a surface member or members are applied to one or both sides of the panel laminate. In the case of using a resin as the material of the panel, it becomes possible to attain a further reduction of weight and facilitate molding, in comparison with the use of a metal.
The bonding between convex portions may be in a relation of 1:1 or even in a relation of 1:2 or more. In 1:1 bonding, both convex portions may be aligned exactly with each other or may be somewhat deviated from each other.
By such "off center" of convex portions the deformation suppressing effect is enhanced and hence there is attained a further improvement of rigidity In the case of 1:2 or more bonding, the bonded convex portions are off center with respect to each other as a matter of course.
The bonding between convex portions may be done by an adhesive bonding using, for example, urethane resin or epoxy resin, or may be done by welding, such as spot welding. In the case of an adhesive bonding or a combination of adhesive bonding and welding, the resulting panel laminate is superior in its impulsive sound absorbing performance, in comparison with the case where only welding does the bonding.
As to the bonding of surface members to the upper and lower surfaces of the panel laminate, it may be done by adhesive bonding or using machine screws.
The above processing comprises relatively simple steps that are repeated. Besides, the processing can be done continuously from a long material, which is in a wound-up state. Thus, the processing in question is also superior in productivity.
EXAMPLES
The high-rigidity panel 1 of the present invention, shown in FIG.4, was fabricated. As each panel 3 there was used a cold-rolled steel plate (thickness: 600 ,u m), which was pressed to form convex portions (bottom diameter: 250 mm, height: 45 mm) of such a shape as shown in FIGS, so as to give a center-to-center distance of 350 mm between the bottoms of adjacent convex portions 2. Thereafter, two such panels 3 were laminated together to form a panel laminate 5, and surface members (particle boards) were axed respectively to the upper and lower surfaces of the panel laminate 5 to afford the high-rigidity panel 1. Bonding between convex portions 2 was done by spot welding, and the a~xation of the surface members 4 to the upper and lower surfaces of the panel laminate was done using machine screws. In the panel laminate of panels 3, the convex portions 2 of the lower panel 3 are in 1:1 correspondence to the convex portions 2 of the upper panel 3, but the convex portions 2 are somewhat off centered with respect to one another.
The high-rigidity panel thus fabricated according to the present invention was checked for rigidity under the application of various loads (e.g.
distributed load and local load). As a result, it turned out that panel of the present invention exhibited a high-rigidity as a whole, with suppressed flexural deformations, even in such a both end-supported state, as shown in FIG.3, in which only end portions of the panel underside were supported.
Thus, the high-rigidity panel of the invention is superior in both strength and rigidity and is lightweight, thus is suitable for use as a floor or wall surface panel of a structure for example.
FIELD OF THE INVENTION
The present invention relates to a high-rigidity panel of lightweight having a high rigidity to be applied to floor or wall surfaces of such structures as building structures, airplanes and vehicles.
DESCRIPTION OF THE PRIOR ART
Heretofore, as structures for use as panels of such structures as building structures, airplanes and vehicles, those of a honeycomb structure are very popular. Metals are mainly used as a constituent material of a honeycomb structure. The thickness of a metal used for the honeycomb structure is very small, in the range of about 50 ,u m to about 100 ,u m.
However, since the honeycomb structure has the function of dispersing the load applied thereto, the panel of the honeycomb structure has the feature that it is very strong despite of lightweight.
However, for fabricating a panel of such a honeycomb structure, it is necessary to go through many manufacturing steps like ~1 adhesive application ~ ~ plate cutting ~ ~3 laminating ~ ~ pressing -~ 5~
cutting. Besides, due to accumulation of losses in those manufacturing steps, the waste of the structural material used becomes large. Furthermore, from the standpoint of productivity, for example at the time of bonding a honeycomb structural member and surface members to one another, so that the surface members cover both sides of the honeycomb structural member, it is necessary that these members after being cut be fixed at predetermined shape and size during the bonding operation. But such a bonding operation is troublesome, giving rise to the problem that the working afficiency is limited and that the productivity is deteriorated markedly.
For solving the above-mentioned problems involved in the panel of the honeycomb structure, a metallic panel of lightweight having a strength high enough for use as a structure wall panel and superior in productivity is proposed in Japanese Patent Application Laid-Open (kokai) No. 6-316015.
FIG.l is a partially cut-away view in perspective of the metallic panel, proposed in the above patent application. This metallic panel, indicated at 7, comprises a structural member 9 with a large number of convex portions 8 formed thereon and surface members 10 bonded to both sides of the structural member 9. In an intermediate layer 11 of the metallic panel are formed a large number of independent cellular portions 12 and continuous spatial portions 13. Since this metallic panel has a large number of cellular portions in its intermediate layer, it is possible to disperse an applied load as is the case with a panel of the honeycomb structure, and hence the metallic panel can exhibit a high strength against the applied load. In panel manufacture, moreover, it is possible to adopt a simple process comprising the steps of subjecting a thin metallic material, such as aluminum to deep drawing or bulging to form a large number of convex portions, and subsequently bonding a surface material to both sides of the thus processed metallic material. For the proposed metallic panel, however, no consideration is given to its rigidity against flexural deformations. Thus, the metallic panel in question involves the problem that it is markedly deficient in rigidity FIGS.2 and 3 show how the above metallic panel is deformed under the application of a load, of which FIG.2 shows a deformed state of the panel under the application of a distributed load p in a stable state of the whole underside of the panel being supported, and FIG.3 shows a deformed state of the panel under the application of the distributed load p in a both end-supported state of only end portions of the panel underside being supported.
As shown in FIG.2, when the distributed load p is applied to the metallic panel in a stable state of the panel underside, the panel can exhibit a high strength. However, as shown in FIG.3, in a both end-supported state of the panel in which only both end portions of the panel underside are supported, the panel is subjected to bending due to the distributed load p. In this case, since the metallic panel is provided with the convex portions 8 in a separated manner at predetermined constant intervals, the portions of the surface members 10 supported by the convex portions 8 are not deformed, whereas the surface member portions located between adjacent convex portions 8 and not supported by the convex portions are apt to be deformed. Once deformations occur at portions of the surface member 10, the panel as a whole easily undergo flexural deformations, thus giving rise to the problem that the rigidity of the panel is insufficient as a structural product.
OBJECT OF THE INVENTION
For panels to be used as floor or wall surface panels of such structures as building structures, airplanes and vehicles, it is required to exhibit a high rigidity as a structural product so as not to cause flexural deformations irrespective of how the panels are supported and no matter in what state a load may be applied to the panels, in addition to the requirement that the panels should be lightweight.
Taking note of the improvement of rigidity out of the performances required for floor or wall surface panels of a structure, in order to prevent flexural deformations of the panels, the present invention intends to provide a panel having a high rigidity SI:f~IARY OF THE INVENTION
Having made various studies about the rigidity of panels, the present inventors made it clear that in the both end-supported state of the foregoing conventional metallic panel with only end portions of the panel underside being supported, the surface member portions located between adjacent convex portions and not supported by the convex portions are easily subjected to flexural deformations, and that the rigidity of the panel as a whole is deteriorated markedly Having made further studies, the present inventors found out a panel structure in which flexural deformations are diminished even when a load is applied to the panel in the both end-supported state of only both ends of the panel underside being supported. In this way we completed the high-rigidity panel of the present invention.
The gist of the present invention resides in the following panel, an example of which is shown in FIG.4 to be referred to later: "a high-rigidity panel having a laminated structure in which two or more panels each having a large number of convex portions are superimposed together, with the convex portions of each panel being bonded to one or more convex portions of the other panel adjacent thereto."
The "laminated structure" as referred to herein, means a laminated panel structure in which panels each having a large number of convex portions are bonded together through the respective convex portions. The material of the panel according to the present invention is not specially limited. Not only steel but also aluminum (Al) and titanium (Ti) are also employable.
Aluminum and titanium not only ensure the required strength of the panel, but also are more advantageous to the reduction in weight of the panel.
Further, the use of the panel according to the present invention, is not limited to floor or wall surfaces of building structures. The panel of the present invention is also applicable to airplanes and vehicles.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG.1 is a partially cut-away view in perspective of an example of a conventional metallic panel;
FIG.2 shows a deformed state of the conventional metallic panel under the application of a distributed load to the panel in a stable state of the whole panel underside being supported;
FIG.3 shows a deformed state of the conventional metallic panel under the application of a distributed load to the panel in a both end-supported state of only both end portions of the panel underside being supported;
FIG.4 is a partially cut-away view in perspective of a construction example of a high-rigidity panel according to the present invention;
FIG.5 shows a flat top of each convex portion formed on each of constituent panels of the high-rigidity panel according to the present invention; and FIG.6 shows a flat top, with an aperture formed therein, of each convex portion formed on each of constituent panels of the high-rigidity panel according to the present invention.
DESCRIPTION OF PREFERRED EMBODIMENTS
As mentioned above, the reason why the conventional metallic panel is deficient in rigidity, is that flexural deformations occur at the surface member portions located between adjacent convex portions and not supported by convex portions. This is because generally the convex portions exhibit a high resistance to deformations, whereas the surface members are low in their resistance to deformations. In other words, if such deformations of the surface members can be suppressed, it is possible to obtain a panel having a high-rigidity. This condition can be satisfied, if the convex portions of each constituent panel are bonded not only to the associated surface member, but also to the convex portions of another constituent panel. Therefore, if the convex portions that exhibit a high resistance to deformations of the panels, are bonded together, it is possible to suppress deformations under the application of a load to the panels, resulting in that the laminated panel as a whole can exhibit a high-rigidity.
FIG.4 is a perspective view with parts partially cut-away to show an example of construction of a high-rigidity panel according to the present invention. The high-rigidity panel of the present invention, indicated at 1, is of a laminated structure (a laminated panel) comprising two or more panels 3 superimposed together and each having a large number of convex portions 2.
The panels 3 are bonded together through the respective convex portions 2 to constitute a panel laminate 5, and one or both sides of the panel laminate 5 are covered with surface members 4. In this case, the convex portions 2 of each panel 3 are bonded to the convex portions 2 of another panel 3. Therefore, even when a load is applied to the laminated panel in a both end-supported state of only both ends of the panel underside being supported, panel deformations are small and a high-rigidity is ensured as the entire panel structure.
The number of another convex portion to which a specific convex portion is bonded may be at least one. For example, assuming that the panel laminate of the present invention is constituted by two panels A and B, the convex portions of panel A may be bonded respectively to the convex portions of panel B in 1:1 relation, or each of the convex portions of panel A may be bonded to two or more convex portions of panel B and, also when viewed from the panel B side, each of its convex portions may be bonded to two or more convex portions of panel A. The larger number of convex portions of panel B
to which one convex portion of panel A, the more dispersed is the load applied to the A-B panel laminate, so that the resistance to deformation increases and the rigidity of the entire panel structure is enhanced.
FIGS.5 and 6 are perspective views showing examples of convex shapes in the panel laminate of the present invention, with no special limitation being imposed on the shape of convex portion. Usually, each convex portion assumes an inverted bowl shape, as shown in FIGS, the upper end of which is preferably flat to enhance the effective bonding with another convex portion or a surface member. The size and shape of each convex portion may be determined according to the place where the panel structure is to be used, the purpose of use, etc. As shown in FIG.6, the flat top of the convex portion may partially be formed with an aperture for facilitating a molding operation.
Even in this case, there is no fear of deterioration in strength or rigidity of the resulting panel laminate for use, as a floor or wall surface panel in such a structure as a building structure, an airplane, or a vehicle.
The number of constituent panels of the panel laminate according to the present invention, is usually two. However, even where the number of constituent panels is three, for example, A, B and C, if convex portions are formed on one sides of panels A and B, and convex portions are formed on both sides of panel C, and if panels A and B are disposed so that their convex portions are opposed to each other, with panel C being sandwiched in between both panels A and B, the convex portions of panel A are bonded to the convex portions formed on one side of panel C, and at the same time the convex portions of panel B are bonded to the convex portions formed on the other side of panel C. Thus, the number of constituent panels may be three. By increasing the number of constituent panels, it becomes possible to thicken the resulting panel laminate. Besides, not only the dimensional range as a structural material can be widened, but also it is possible to expect the improvement of rigidity and of heat insulating property As described above, the panel laminate of the present invention has a surface member or members, e.g. particle board, on one or both sides thereof.
Like a panel of the honeycomb structure, the panel structure of the present invention exhibits the function of dispersing a load applied thereto. Besides, the panel laminate of the present invention is high in strength, and the convex portions of the constituent panels are bonded together, so it is little deformed and exhibits a high-rigidity as a whole.
As to the material of the high-rigidity panel of the present invention, there is no special limitation. In the case of using steel, there is adopted any of steel plates, various plated steel plates and pre-coated steel plates. As noted previously, other metallic materials may be used such as, for example, aluminum and titanium or various resins may be used. The use of aluminum or titanium not only contributes to the enhancement of rigidity, but also is more advantageous to the reduction in weight of the resulting panel.
For fabricating the high-rigidity panel of the present invention, if a metal is used as the material of the panel, the metal is usually as thin as to 1200,um and is subjected to deep drawing or pressing to form convex portions at predetermined positions, then, for example, two of the panels thus formed are bonded together through the respective convex portions to afford a panel laminate. Next, a surface member or members are applied to one or both sides of the panel laminate. In the case of using a resin as the material of the panel, it becomes possible to attain a further reduction of weight and facilitate molding, in comparison with the use of a metal.
The bonding between convex portions may be in a relation of 1:1 or even in a relation of 1:2 or more. In 1:1 bonding, both convex portions may be aligned exactly with each other or may be somewhat deviated from each other.
By such "off center" of convex portions the deformation suppressing effect is enhanced and hence there is attained a further improvement of rigidity In the case of 1:2 or more bonding, the bonded convex portions are off center with respect to each other as a matter of course.
The bonding between convex portions may be done by an adhesive bonding using, for example, urethane resin or epoxy resin, or may be done by welding, such as spot welding. In the case of an adhesive bonding or a combination of adhesive bonding and welding, the resulting panel laminate is superior in its impulsive sound absorbing performance, in comparison with the case where only welding does the bonding.
As to the bonding of surface members to the upper and lower surfaces of the panel laminate, it may be done by adhesive bonding or using machine screws.
The above processing comprises relatively simple steps that are repeated. Besides, the processing can be done continuously from a long material, which is in a wound-up state. Thus, the processing in question is also superior in productivity.
EXAMPLES
The high-rigidity panel 1 of the present invention, shown in FIG.4, was fabricated. As each panel 3 there was used a cold-rolled steel plate (thickness: 600 ,u m), which was pressed to form convex portions (bottom diameter: 250 mm, height: 45 mm) of such a shape as shown in FIGS, so as to give a center-to-center distance of 350 mm between the bottoms of adjacent convex portions 2. Thereafter, two such panels 3 were laminated together to form a panel laminate 5, and surface members (particle boards) were axed respectively to the upper and lower surfaces of the panel laminate 5 to afford the high-rigidity panel 1. Bonding between convex portions 2 was done by spot welding, and the a~xation of the surface members 4 to the upper and lower surfaces of the panel laminate was done using machine screws. In the panel laminate of panels 3, the convex portions 2 of the lower panel 3 are in 1:1 correspondence to the convex portions 2 of the upper panel 3, but the convex portions 2 are somewhat off centered with respect to one another.
The high-rigidity panel thus fabricated according to the present invention was checked for rigidity under the application of various loads (e.g.
distributed load and local load). As a result, it turned out that panel of the present invention exhibited a high-rigidity as a whole, with suppressed flexural deformations, even in such a both end-supported state, as shown in FIG.3, in which only end portions of the panel underside were supported.
Thus, the high-rigidity panel of the invention is superior in both strength and rigidity and is lightweight, thus is suitable for use as a floor or wall surface panel of a structure for example.
Claims (12)
1. A high-rigidity panel comprising a laminate structure of two or more panels superimposed together, said panels each having a multitude of convex portions, said convex portions of each said panel being each bonded to one or more convex portions of another said panel.
2. A high-rigidity panel according to claim 1, wherein said panels are each constituted by a steel plate.
3. A high-rigidity panel according to claim 1, wherein said panels are each formed using a metallic material selected from aluminum and titanium.
4. A high-rigidity panel according to claim 1, wherein the concave portions of said panels are formed by pressing.
5. A high-rigidity panel according to claim 1, for use as a floor or wall surface panel of such a structure as a building structure, an airplane, or a vehicle.
6. A high-rigidity panel comprising a laminate structure of two or more panels superimposed together, said panels each having a multitude of convex portions, said convex portions of each said panel being each bonded in a pair to one said convex portion of another said panel.
7. A high-rigidity panel according to claim 6, wherein said panels are each constituted by a steel plate.
8. A high-rigidity panel according to claim 6, wherein said panels are each formed using a metallic material selected from aluminum and titanium.
9. A high-rigidity panel according to claim 6, wherein the convex portions of said panels are formed by pressing.
10. A high-rigidity panel according to claim 6, wherein the bonding between said convex portions is performed by spot welding.
11. A high-rigidity panel according to claim 6, wherein said convex portions bonded in a pair are not in alignment with each other.
12. A high-rigidity panel according to claim 6, for use as a floor or wall surface panel of such a structure as a building structure, an airplane, or a vehicle.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7307374A JPH09141769A (en) | 1995-11-27 | 1995-11-27 | High rigidity panel |
| CA002239532A CA2239532A1 (en) | 1995-11-27 | 1998-06-01 | High-rigidity panel |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7307374A JPH09141769A (en) | 1995-11-27 | 1995-11-27 | High rigidity panel |
| CA002239532A CA2239532A1 (en) | 1995-11-27 | 1998-06-01 | High-rigidity panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2239532A1 true CA2239532A1 (en) | 1999-12-01 |
Family
ID=31496498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002239532A Abandoned CA2239532A1 (en) | 1995-11-27 | 1998-06-01 | High-rigidity panel |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH09141769A (en) |
| CA (1) | CA2239532A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108104338A (en) * | 2017-12-27 | 2018-06-01 | 陈猛 | Scroll casing shape ties up the composite plate and curtain wall of bridge arch structural bearing plate entirely |
| AU2019261740B2 (en) * | 2018-12-21 | 2022-09-08 | X Facade System Pty Ltd | An improved cladding panel |
| CN107571557B (en) * | 2017-09-15 | 2023-04-14 | 红岛实业（英德）有限公司 | Composite board and production process and equipment thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5966429B2 (en) | 2012-02-27 | 2016-08-10 | キョーラク株式会社 | Manufacturing method of resin panel, manufacturing method of sandwich panel |
| JP6486616B2 (en) * | 2014-06-19 | 2019-03-20 | 株式会社アイ・レック | Moisture removal device and moisture removal system using the water removal device |
-
1995
- 1995-11-27 JP JP7307374A patent/JPH09141769A/en active Pending
-
1998
- 1998-06-01 CA CA002239532A patent/CA2239532A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107571557B (en) * | 2017-09-15 | 2023-04-14 | 红岛实业（英德）有限公司 | Composite board and production process and equipment thereof |
| CN108104338A (en) * | 2017-12-27 | 2018-06-01 | 陈猛 | Scroll casing shape ties up the composite plate and curtain wall of bridge arch structural bearing plate entirely |
| AU2019261740B2 (en) * | 2018-12-21 | 2022-09-08 | X Facade System Pty Ltd | An improved cladding panel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09141769A (en) | 1997-06-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 20020402 |