JP2000064499A - Hyperbolic paraboloidal structural panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the weight and enhance the rigidity by halving a horizontally columnar body along a cut line moving in parallel from the front end surface toward the rear end surface so that the cut surface has a plate piece having a continued surface consisting of the combination of hyperbolic paraboloids. SOLUTION: When the cutting of a horizontally columnar body 1 having a square section is performed from cut line 1, 3 to 6, 8 while it is equally halved along a cut line moving parallel from the front ends 1-4 toward the rear ends 5-8, and it is at that time rotated to the left at a rotating angle speed proportional to the advancing speed by a rotating angle 90 deg. along central axes 9, 10 passing the centers of gravity of the front end surface and the rear end surface, a basic form L of the cut surface 1, 3, 8, 6 is provided. When it is rotated to the right, a basic form R of cut surface 13, 15, 18, 16 symmetric to the above is provided. The cut line 1, 3 or 13, 15 has the same ratio of rotating speed to advancing speed, and the resulting cut surfaces 1, 3, 8, 6 and 13, 15, 18, 16 are hyperbolic paraboloidal. Accordingly, a light-weighted structural panel with high rigidity can be formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a structural panel based on a hyperbolic parabolic surface and can be used in various applications such as the following.

(1) Wall materials, floor materials, roofing materials, formwork materials, etc. as structural panels for buildings (2) Body panels for automobiles, trains, etc., structural panels for aircraft, ships, etc. as structural panels for vehicles and transportation equipment , Spacecraft structural panels such as satellites (3) Storage containers for gases, liquids, powders, etc. Structural panels such as water tanks, fuel containers, gas containers, heat accumulators (4) Soundproof and silencing panels ( 5) As a panel for filters (6) Structural panel for shock absorption (7) In addition, as a core material, doors, tatami mats, panels for fittings, boxes,
etc

[0003]

(1) Conventional honeycomb core or lattice core,
A structural panel in which a core having a short tubular hollow columnar shape is used as a core material and a flat plate or the like is sandwiched between upper and lower surfaces of the core material is known. Japanese Examined Patent Publication 3-2055, Japanese Examined Publication 3-77058, Japanese Examined Publication 4-3738, Japanese Examined Examination 4-11105, Japanese Examined Examination 4-
46222, Special Fairness 3-72458, Actual Fairness 5-309
09, Japanese Unexamined Patent Publication No. 1-1194384, Japanese Utility Model Publication 5-3090
A panel structure using a hollow columnar shape such as No. 9 is extremely strong against a distributed load from a direction perpendicular to the panel surface, but a load parallel to the upper and lower skin surfaces of the structural panel. It is also pointed out that it is weak against (the load in the ribbon direction and the transverse direction). (2) Next, in the structure panel in which the hollow columnar shape is used as the core material and the flat plate is sandwiched between the upper and lower surfaces as outer skins, each cell of the honeycomb chamber or the cell-shaped structure has side walls. Since the cells are hermetically closed and air cannot pass through each cell, deformation or peeling may occur due to a pressure change inside and outside the cell due to a temperature difference or the like. To solve this problem, a method of providing through holes is disclosed in Japanese Patent Publication No. 1-51332, Japanese Patent Publication No. 1-54186, Japanese Patent Publication No. 5-88183, and Japanese Patent Laid-Open No. 6-9.
02, etc., but further improvement in the ventilation state is desired. In the conventional method, the number of processing steps is increased and the economy is negative.

(3) Regarding the processing of the hollow columnar structural panel into a cylindrical shape or a curved surface, Japanese Patent Laid-Open No. 7-16963,
Even in JP-A-6-198364, easier workability is desired.

(4) As described in the prior art (2), the above-mentioned hollow pillar-shaped structural panel is surrounded by the hollow pillar-shaped side wall in the panel and is used for transmission lines of electric and communication systems,
Since there is no space to insert a gas or liquid transmission pipe, it may be necessary to process the transmission line.
1307 and Japanese Patent Laid-Open No. 6-170991, but the number of processing steps is increased and the cost is high.

As a result of many years of research on the effectiveness of a hyperbolic parabolic surface as a fluid contact plate, the present invention clarifies a method of forming a hyperbolic parabolic surface and a fluid contact plate formed by a combination, and provides No. 5-49336 "Fluid contact plate", Japanese Patent Application Laid-Open No. 2-290247 "Fluid contact plate suitable for cross flow", and Japanese Patent Application No. 7-337115 "Spheroidized hyperbolic parabolic fluid contact plate". In the present invention, the present invention has developed a spherical hyperbolic parabolic face plate which includes many curved portions in the plane and has extremely few linear portions in the plane among these inventions as prior arts. The straight portion in the hyperbolic parabolic surface is reinforced by a convex or concave projection, which further increases the bending strength and the rigidity.

[0007]

Conventionally, a lot of hollow columnar structural panels based on a honeycomb core have been developed,
Although improved, it has the following problems, and the present invention aims to solve one or more of these problems.

(1) Conventional honeycomb core or lattice core,
There are many manufacturing steps for manufacturing a structural panel in which a core having a short tubular hollow columnar shape is used as a core material, and a flat plate or the like is sandwiched between the upper and lower surfaces of the core material as an outer cover.

(2) The hollow columnar structural panel is weak against a load in a direction parallel to the surfaces of the upper and lower outer skins.

(3) Since the hollow columnar structure panel has partition walls in cells formed by cores and has no air permeability or penetrability, deformation or damage due to local load change due to temperature change or pressure change. Cause of.

(4) Since the above-mentioned partition wall cannot pass an electric wire or a transmission pipe, it is necessary to process the transmission line.

(5) Due to the nature of honeycomb cores, lattice-shaped cores, etc., curved surface processing is not easy in the production of curved structural panels.

(6) When a honeycomb core, a lattice-shaped core or a core having a short tubular hollow columnar shape is used as a core material and a flat plate or the like is sandwiched and bonded to the upper and lower surfaces of the core material, the bonding surface cannot be wide.

In view of the above points, the present invention provides a structural panel having a lighter weight and a higher rigidity, and in particular, it is a hyperbolic curve that can add utility value to voids in the structural panel. It is an object to provide a structural panel using a parabolic plate.

[0015]

SUMMARY OF THE INVENTION The present invention provides a structural panel utilizing a hyperbolic paraboloid having a construction having one or more of the features described below.

(1) In a laterally-oriented columnar body whose front and rear end surfaces have either a square shape or a rectangular shape, the laterally-oriented columnar body is bisected by a cutting line which moves in parallel from the front end face to the rear end face, The cutting line is continuously 90 degrees or 9 along the central axis passing through the center of gravity of the front and rear end surfaces.
Use a plate-like piece of which the cutting surface formed by bisecting the cutting line is a combination of hyperbolic parabolic surfaces so as to rotate at an angle close to 0 degree.

(2) The cutting line is a straight line or a curved line, and the turning speed is the same as or close to the traveling speed along the central axis, and the obtained curved surface shape is a hyperbolic parabolic surface.

(3) The above-mentioned cutting line turns leftward L
A hyperbolic parabolic surface plate consisting of a combination of an L type and an R type.

(4) Making a composite basic form in which four basic L-types and basic R-types are alternately combined, and utilizing the curved surface shape of the surface of the composite basics arranged in a zigzag or in an array.

(5) A concave or convex projection is formed on a partially or continuous straight line portion within the hyperbolic parabolic surface described in (1) to (4) above.

(6) When using at least two hyperbolic parabolic plates of the above (1) to (5), the surfaces are alternately inverted and arranged one above the other, and the recesses of the plate material in the upper stage are cut. The bottom valley part is to be joined to the truncated mountain part of the convex part of the plate material in the lower stage.

(7) One or a plurality of hyperbolic parabolic face plates of the above (1) to (6) is used as a core material, and a flat plate or the like is sandwiched from both sides as outer skins on both upper and lower surfaces of the core material.

(8) In the structural panel of (7) above, a void portion is formed in the panel, and the void portion is connected in a direction parallel to the surface of the outer skin of the panel.

(9) As a similar form to (7) above, the core material has a pyramid or cone as a basic shape, and these basic shapes are formed into a flat truncated cone-shaped convex portion and a truncated valley-shaped concave portion alternately. Although there is a continuous surface formed so as to have a straight line, a straight line, a polygonal line close to a straight line, or a continuous line of curved lines exists in the plane parallel to the continuous surface.
Forming concave or convex projections on the above-mentioned straight line or the broken line or curved line portion close to the straight line.

(10) A claw such as gypsum or a foam material is provided in the void of the structural panel comprising (1) to (9).

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is a structural panel characterized by adopting a shape formed by combining hyperbolic parabolic surfaces, and the structural panel can be manufactured by the following method.

FIG. 1 is a perspective view for explaining a basic shape L and a basic shape R of a hyperbolic parabolic surface of the present invention. The front end surfaces of the horizontal columnar bodies 1, 2, 3, 4, 5, 6, 7, 8 having a square section. 1, 2, 3,
4 to the rear end faces 5, 6, 7, and 8 while bisecting the cutting line to reach the cutting lines 1, 3 to 6, 8 while the central axis passing through the center of gravity of the front end face and the rear end face 9,
A left turn is made along 10 along a turning angle of 90 degrees at a turning angular velocity proportional to the traveling speed. As a result, the cut surfaces 1, 3,
Basic shapes L of 8 and 6 are formed. In addition, the basic shape R of the cut surfaces 13, 15, 18, 16 which are symmetrically turned to the right can be formed. In this case, the cutting straight lines 1, 3 or 13, 15 have the same turning speed with respect to the traveling speed, and the cutting surfaces 1, 3,
8, 6 and 13, 15, 18, and 16 are hyperbolic parabolic surfaces.

FIG. 2 shows an embodiment in which the basic form of FIG. 1 is made spherical.

FIG. 3 shows the front end faces 1, 2, 3, of the basic form of FIG.
At 4, the intersections of the cutting lines 1 and 3 move in the same direction from 1 to 4 on the lines 1 and 4 and 3 on the lines 2 and 3 at the same ratio, and the rear end faces 5, 6, 7, Cutting line 6, 8
On the lines 5 and 8 in the direction from 8 to 5 and on lines 6 and 7 from the direction from 6 to 7 at the same ratio as the cutting line of the front end face. Front end face 1
The intersection point of the cutting lines 13, 15 of 2, 13, 14, 15 moves in the same direction in the direction 15 to 12 on the lines 12 and 15 and in the direction 13 to 14 on the lines 13 and 14, and the rear end face 1
6, 17, 18 and 19, the intersection of the cutting lines 16 and 18 is on the lines 16 and 19 in the direction from 16 to 19,
On the shape of 18, the front end face and the rear end face move in the direction from 18 to 17 at the same ratio.

FIG. 4 shows that in the basic form L of FIG. 1, the cutting line of the front end face is a vertical line passing through the center point 9 to the center lines 9 and 10.
(L), which was made by turning leftward at a constant ratio of 90 degrees to the rear end face through the front end face, cuts the front end face from the horizontal line passing through the center point 20 through the center lines 20 and 21. (R) is formed by turning 90 degrees to the rear end face to the right at a constant ratio.

FIG. 5 is a perspective view of a continuous surface of a hyperbolic parabolic surface formed by arranging the basic shapes (L) and (R) of FIG. 1 side by side, and a shape in which 31, 32, 33 and 34 are connected by a line. Is a unit surface of a hyperbolic parabola, and 35 and 36 represent the positions of two parabolas.

FIG. 6 is a perspective view of a continuous surface of the spherical hyperbolic parabolic surface formed by arranging (L) and (R) of the spherical hyperbolic parabolic surface shown in FIG. 2 side by side.

FIG. 7 is a structural panel having a continuous surface 47 of a hyperbolic parabola formed by arranging (L) and (R) of FIG. 3 side by side, and the lower surface 48 is a flat skin. so,
It is a perspective view before adhering the flat plate of the upper skin. The face of the truncated chevron C and the face under the truncated valley C'are adhesive surfaces.
The reference numeral 55 designates a convex spherical projection formed on a straight line portion parallel to the surface of the core material.

In FIG. 8, continuous surfaces 47 and 47 having the same shape as the hyperbolic parabolic surface of FIG. 7 are reversed 49 and are bonded by a bonding surface C.
It shows a structural panel in which 0 is sandwiched and bonded.

FIG. 9 is a plan view of the perspective view of FIG. 7 seen from the top of the surface, where C is a truncated mountain-shaped adhesive surface, and C'is a truncated valley-shaped valley. The dotted lines in the figure of the hyperbolic parabolic plate 51, 52, 53, 54 represent the positions of continuous straight lines parallel to the surface. The straight line portion in the plane represented by the dotted line is a portion where the bending strength of the surface is weakened, and a convex spherical projection 5 is formed on the straight line portion.
5 is an example in which 5 is formed side by side at a constant interval to increase the bending strength.

FIG. 10 shows a hyperbolic parabolic plate in which a plurality of basic shapes obtained by alternately combining four (L) and (R) in FIG. 4 are arranged.

In FIG. 11, (L) and (R) of FIG.
It shows a hyperbolic parabolic plate in which a plurality of individual basic shapes are arranged in a staggered pattern.

The hyperbolic parabolic plate shown in FIGS. 10 and 11 has a structure strong against a load perpendicular to the plane.

[0039]

The invention, according to its embodiments, has one or more of the following advantages.

(1) Since a continuous surface plate having a hyperbolic parabolic surface has many curved portions in the surface and the external force applied to the surface is transmitted mainly by the in-plane force, the surface strength is strong and effective as a lightweight and rigid material. is there.

(2) Since the bonding surface can be wider than that of a hollow columnar core such as a honeycomb core or a lattice-shaped core, not only the peeling phenomenon can be prevented but also the hyperbolic parabolic plate as a core material is structurally It has strong rigidity even against loads parallel to the upper and lower skins of the structural panel.

(3) In the case of a structural panel using a hollow columnar core such as a honeycomb core or a lattice-shaped core as a core material, a large number of cells in a hermetically sealed state are present in the panel. Although it causes peeling phenomenon and damage due to changes in pressure and atmospheric pressure, the structural panel using the hyperbolic parabolic plate has air permeability because the voids are connected in the direction parallel to the upper and lower skin surfaces. The phenomenon and damage can be prevented.

(4) In the case of a structural panel having a hollow columnar core such as a honeycomb core or a lattice-shaped core as a core material, there are a large number of cells as described above, and the side walls of these cells exist, so that electricity, communication, transportation pipes, etc. Although it is necessary to give a groove to pass the transmission tube of, the structural panel using the hyperbolic parabolic plate has voids connected in parallel to the upper and lower outer skins of the panel. Transmission pipes such as communication and transportation pipes,
It can be passed inside the structural panel without grooving. In addition, it can be used as a storage chamber for transporting gas, liquid, powder, etc. in the connection of the voids of the structural panel.

(5) In the structure panel of the hyperbolic parabolic surface, there is a continuous straight line portion (FIG. 9) in the continuous surface of the hyperbolic parabolic surface, and this straight line portion is a portion weak against bending load. Therefore, curved surface processing becomes easy unless this straight line portion is reinforced.

(6) The productivity is good because the number of manufacturing steps is small.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a basic form of hyperbolic parabolic surface formation of the present invention.

FIG. 2 is a perspective view of a spheroidized hyperbolic parabolic surface.

FIG. 3 is a perspective view showing an example of a basic form of hyperbolic parabolic surface formation having an adhesive surface.

FIG. 4 is a perspective view showing a second example of a basic form of forming a hyperbolic parabolic surface having an adhesive surface.

FIG. 5 is a perspective view of a continuous surface of a hyperbolic parabolic surface.

FIG. 6 is a sketch drawing of an example of a continuous surface of a spheroidized hyperbolic parabolic surface.

FIG. 7 is a perspective view of the structural panel in which the basic shape having the adhesive surface of FIG. 3 is a continuous surface before the upper skin surface is attached.

FIG. 8 is a perspective view of a structural panel using two hyperbolic parabolic surfaces having adhesive surfaces.

9 is a plan view of the structural panel of FIG. 7 as seen from above the plane.

FIG. 10 is a perspective view of a continuous surface in which a composite basic form in which four basic forms of the second example having the adhesive surface of FIG. 4 are alternately combined are arranged in an array.

11 is a perspective view of a continuous surface in which a composite basic form in which four basic forms of the second example having the adhesive surface of FIG. 4 are alternately combined is arranged in a staggered manner.

[Explanation of symbols]

T The top of the convex portion of the truncated mountain (Fig. 5) T'The bottom of the trough-shaped recess (Fig. 5) S The top of the truncated chevron (Fig. 6) S'Bottom of a valley-shaped recess (Fig. 6) C Adhesive surface of truncated mountain-shaped convex part (Fig. 7, Fig. 8, Fig. 9) C'Bottom of trough-shaped recess (Figs. 7, 8 and 9)

Claims (10)

[Claims] 1. A horizontal columnar body having front and rear end surfaces each having either a square shape or a rectangular shape, and the horizontal columnar body is bisected by a cutting line that moves in parallel from the front end surface to the rear end surface. The cutting line is continuously 90 degrees or 90 degrees along the central axis passing through the center of gravity of the front and rear end surfaces.
A hyperbolic parabolic structure panel characterized in that the cutting surface formed by bisecting the cutting line has a plate-like piece of a continuous surface formed of a combination of hyperbolic parabolic surfaces so as to rotate at an angle close to a degree. . 2. The curved line shape obtained when the cutting line is a straight line or a curved line and the turning speed is the same as or close to the traveling speed along the central axis is a hyperbolic parabolic surface. A hyperbolic parabolic structural panel according to claim 1. 3. The cutting plane of the two basic types, that is, the L-shaped turning line that turns leftward and the R-type that turns rightward, is composed of a combination of hyperbolic parabolic surfaces. Or the hyperbolic parabolic structure panel according to 2. 4. The basic type L type and the basic type R type are alternately 4
4. A hyperbolic parabola according to claim 1, characterized in that a curved surface shape of a composite basic form formed by combining individual basic forms is used in a zigzag or in an array. Structure panel of the surface. 5. A partial or continuous straight line portion also exists in the plane of the hyperbolic parabolic plate, and a concave surface is formed in the straight line portion in order to increase rigidity such as bending strength of the straight line portion in the plane. 2. A projection having a convex shape or a convex shape is formed.
2. A hyperbolic parabolic structure panel according to item 1 to 4 above. 6. When using at least two hyperbolic parabolic plates, the faces are alternately inverted and arranged one above the other, and the cut bottom valleys of the plate material in the upper stage are cut off from the convex parts in the lower stage. The hyperbolic parabolic structure panel according to any one of claims 1 to 5, wherein the head mountain portion is joined to the head mountain portion. 7. A parabolic parabolic plate or a plurality of said hyperbolic parabolic plates are used as core materials, and a flat plate or the like is joined to both upper and lower surfaces of the core materials as outer skins so as to be sandwiched from both sides.
Parabolic structure panel described in paragraph. 8. The structural panel according to claim 7, wherein a void portion is formed in the panel, and the void portion is connected in a direction parallel to the surface of the panel. Curved parabolic structure panel. 9. The structural panel according to claim 7, wherein the core material has a pyramid or a cone as a basic shape, and these basic shapes are formed into a flat truncated cone-shaped convex portion and a truncated valley-shaped concave portion alternately. Although there is a continuous surface formed so that there is a straight line, a polygonal line that is close to a straight line, or a continuous line of a curved line in parallel to the continuous surface, the above straight line, a polygonal line that is close to a straight line, and a curved line portion. To
A structural panel characterized by increasing the rigidity such as bending strength of a surface by forming a concave or convex protrusion. 10. A structural panel according to claim 1, wherein voids in the structural panel are claws such as gypsum and foam material.