JPS62260943A - Method for producing building panel - 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] (*Field of commercial use) The present invention relates to a method of manufacturing panels for building exteriors and the like.

Exterior panels such as curtain walls in architecture make large walls look beautiful, so the flatness precision of the individual panel materials and glass surfaces that make up the wall surfaces is required to be even higher than that of ships and vehicles, and as a general rule, As such, it is prohibited to leave any traces of plate joints or welding within a single panel. In particular, when using glass, reflective metal, or glossy painted panels that reflect light specularly, slight differences in flatness or surface distortion will be amplified by distance, making the wall look very ugly, so be especially careful. is required. Next, in the case of ships, vehicles, and aircraft, the entire force is received by the outer skin, which is integrally joined to the frame.
It is completed in an integrated structure that is watertight and airtight.
I! ! In the case of built-in panels, structural strength such as floor loads and seismic forces are not borne, but only out-of-plane wind pressure is borne, and deformation of the structure due to earthquakes and wind, as well as thermal displacement due to temperature changes, are borne at the joints of the panels. The metal itself is able to withstand local impact from humans and sweeping equipment, as well as wind pressure, and if the necessary fire resistance can be secured, the metal plate is quite thin (although The present invention relates to such industrial fields of application, where the joints are required to be expandable and contractible without any problems, and to have properties such as watertightness, airtightness, sound insulation, and fireproofing.

(Prior art) Conventionally, as shown in Fig. 11, this type of panel is made of aluminum or stainless steel plate (1) with a thickness of about 1.5 to 2.5 mm, and is fixedly fixed as shown in (2°). The temporary center part is attached to the rearranged frames in a convex manner, but this is because the temperature difference outside the frame is always larger than that of the frame, and the coefficient of thermal expansion is about twice that of aluminum and about 1.0 times that of stainless steel. By restraining the expansion and contraction of the plate material, which is 5 times larger than that of steel, the frame prevents the plate from breaking at the bent part due to metal fatigue due to repeated tension, and also prevents the bending that occurs in the plate material from being seen from the outside. This is to prevent a concave shape in the center, which looks particularly unsightly due to shadows.

Therefore, since it is not completely flat, on shiny metal surfaces, durable high-gloss painted surfaces, gold V4 tone painted surfaces, etc., the distortion will be clearly visible due to reflection and will be unsightly. Because paint was used to create thin patterns on the metal surface, the walls had to have an extremely neutral appearance.

In recent years, in the United States and other countries, in order to meet the demand for high flatness for building exterior panels, we have developed a system with high flatness and rigidity for panels with a diameter of 1.5 meters and a length of 3 to 4 meters, as shown in Figure 12. 4.5-6.0mm thick aluminum plate (1)
is used for the surface, and the frame (2') is made of aluminum extruded material &1! to make the thermal displacement the same, and the aluminum plate is added to the frame by welding port or plug welding (4), but its As shown in Figure 12, the thickness is such that the marks are not visible on the surface, and the outer plate of aluminum or stainless steel with a thickness of about 1.5 mm as shown in (1) and the thickness of the same thickness as the surface, Back plate (m, ) and aluminum honeycomb material (h) of about 0 mm
By sandwiching a sheet of thermosetting epoxy adhesive (e) on both sides of the panel and using heat press to create a completely flat panel, a thick eutectoid heating material (W) is applied to the entire back surface of the panel and frame. By making the temperature difference between the panel and the frame, and the temperature difference between the front plate and the back plate relatively small, combined with the good heat conductivity of the aluminum honeycomb material, the difference in expansion and contraction between the frame and the panel, and the difference in temperature between the front plate and the front plate are reduced. We have succeeded in producing architectural panels with extremely good flatness by preventing warping due to the difference in expansion and contraction between the face plate and back plate, and creating a very good appearance.

However, the methods of using thick aluminum plates, extruded aluminum frames, and expensive aluminum honeycombs are very expensive in Japan, and while there are only a few examples of the former, there are probably no examples of the latter. Therefore, large panels are generally manufactured using the central convex method, but the flatness is poor, and only panels with a relatively small horizontal dimension can achieve relatively good flatness because the plate rigidity is relatively improved. It remains in

Therefore, there is a strong need to develop inexpensive, large-sized panels with good flatness using economical thin plates.

The technology that is expected to solve the above-mentioned needs is disclosed in the patent application published in 1983-3926.
As shown in 1, while pulling the outer plate (1) through the cutout part (k) with a chuck ((1) and stretch Ha ('')), attach it to the fixed frame (2') by welding (4), and then A fixed frame that generates residual stress in the plate (1) to eliminate distortion, etc., or a fixed frame that heats and expands the outer plate with a heater (n), as shown in Patent Application Publication 1983-392 (12). (2')
There is a method to prevent the occurrence of distortion by attaching it to the outer plate and generating tensile residual stress on the outer plate through cooling contraction.

(Problems to be Solved by the Invention) However, in the above method, in order to apply tension to the outer plate (1) by the stretch Ha(r) via the chuck (Q), a truncated portion is used. (k), etc., so installation to the frame requires spot welding (4) from the temporary outer surface, fillet welding or plug welding from the back surface, but with thin plates, welding traces and welding distortion will occur, so there is an interlayer. In welding, it is difficult to use quickly when the thin plate and the frame are made of dissimilar metals, and even when the thin plate is a factory-painted plate (pre-coated plate), molding occurs during welding due to damage to the paint film. Methods such as bending that can be attached to the frame are impossible because of the chuck, and welding has disadvantages such as being impossible even when it is necessary to release the thermal expansion of the thin plate in the direction perpendicular to the stress. Even if welding can be performed without any problems, there are many problems such as bending and cutting of the edges of the thin plate, and the need to ensure watertightness, airtightness, etc. necessary for building exterior panels after the thin plate is attached to the frame.

Next, the latter, as shown in Figure 15, was published as a patent application in 1972.
This is an attempt to apply the method of 39202, and there is no problem like the former, but when covering the frame (2°) with a heat-expanded panel (1), the length of one side of the panel Assuming that the length is 1 to 3 meters, the required elongation dimension of the thin plate is about half of the J provisional yield point strain of 0.29A point, which is usually about 0.1%, which is about 1 to 3 mm. However, even if the manufacturing accuracy of the frame and panel is about -1 mm, which is high enough for construction, the residual stress in the thin plate is 200 to 0% for 1 meter, and 1 for 3 meters.
It is 33 to 66%, and considerable variation occurs. Furthermore, considering the diagonal size difference, etc., it is actually very difficult to generate even residual stress, and even at room temperature, the difference in tension change between each panel due to temperature fluctuations can reduce the appearance effect. There remains the risk of fatigue cracks occurring due to the generation of excessive stress, and solving this problem requires machining with almost zero error, which is impossible with normal machining precision.

In the end, the above two patents are mainly aimed at semi-monocoque structures such as vehicle outer panels.
The fabrication precision of the outer panels and frames is such that the outer panels are stretched with equal tension over a large number of frames and stringers, and fixed to the frames with multiple spot welds from the outer surface. This method is not necessarily suitable for manufacturing architectural panels (although this method has previously been effectively used in vehicle manufacturing, it has not been used for architectural exteriors).

(Means for Solving the Problems) (1) The present invention solves the above problems. After the thin plate is installed in a frame so that it can be expanded in the plane of the thin plate and outward, it can be expanded in one axis direction within the plane of the thin plate and outward using an expansion force mechanism assembled to the joint of the frame or an external frame expansion device. Alternatively, the frame is expanded in two axes perpendicular to the former, and after checking the force applied from the frame to the thin plate, the joint sleeve of the frame is fixed by welding, etc., and the stress on the thin plate is approximately below the yield point. The gist of this is to allow a stress of approximately one-half of the normal yield point stress to remain in the frame due to the corresponding reaction force.

(2) In the above (1), the thin plate and the frame are attached by bending the thin plate and attaching it to the frame with screws, etc. on the edge side rather than on the surface of the panel, but in addition to attaching the thin plate directly to the frame, Packing materials with a high expansion rate (such as high-strength heat-resistant rubber, heat-resistant plastics, and in some cases, suitable deformability) are used between the thin plate and the frame on four sides. In some cases, alloys or the like may be inserted alone or in combination.

In addition, a sliding material such as a fluorine compound that reduces friability may be inserted between the frame and the thin plate alone or in combination with the above-mentioned packing material.

(3) When attaching the thin plate to the frame in (2) above, in addition to the thin plate, frame, packing material, sliding material, etc., an auxiliary frame made of extruded aluminum or the like may be used alone or with the above packing material, sliding material, etc. It may also be used in combination with wood, etc.

(Function) (1) Therefore, the thin plate that has been given an appropriate residual stress by the expansion of the frame will expand with the frame due to the temperature difference between the thin plate and the frame and the difference in thermal expansion coefficient due to the panel environment after panel fabrication. The difference in shrinkage is simply an increase or decrease in the residual stress that has been applied to the thin plate in advance, and due to the so-called prestress effect, where tensile stress always exists within the thin plate, the thin plate is always tensioned within the frame plane and can maintain a flat surface. Needless to say, in the present invention, the frame expansion device necessarily has the function of adjusting the dimensions of the frame, so even if errors occur in the normal bending process of thin plates and the accuracy of frame assembly, , after installing the frame within the inner dimensions of the bent side of the thin plate, expand the frame, bring the outer surface of the frame into contact with the inside of the curved part of the thin plate, and then apply force, which completely eliminates the influence of errors. It can be eliminated.

In addition, it is possible to check the degree of applied force after contact using the screw rotation angle method, rotational force method, pressure gauge, etc., and the frame itself also receives a reaction force at the same time. Public notice 1973-
No. 3921111, after welding the frame and the outer panel, and after removing the restraining stress of the outer panel, the patent application was announced in 1972.
The method applying No. 3-39202 has the advantage that it can be fixed after confirming the stress and reaction force, unlike the situation where the reaction force of the frame appears only after the outer plate has cooled after fixing.

Next, in the present invention, almost all of the tensile force of the thin plate is transmitted to the frame at the bending part of the plate, so the frame can be attached with screws (it is also possible to connect dissimilar metals, and loose holes can be used to attach the frame to the frame). It is also possible to release thermal expansion/contraction displacement in the hand direction, and no screws appear on the surface.

(2) Next, if the residual stress and its increase/decrease stress exceed the appropriate range due to the materials, dimensions, etc. of the thin plate and frame, or if you want to increase safety, the frame and 'i! In the packing material between the I-plates, the loosening of the thin plate, which is a decrease in the residual stress of the thin plate due to the expansion of the thin plate exceeding the expansion of the frame, can be controlled by its large coefficient of thermal expansion and the pre-given compression. Compensation and absorption due to force-based impact resilience, and conversely, when the shrinkage of the thin plate is greater than the contraction of the frame, excessive stress is generated in the thin plate, leading to creep of the thin plate and the risk of fatigue rupture, especially in stress-concentrated areas. For this purpose, excessive stress is prevented from being generated due to shrinkage and compressive deformation due to the large shrinkage rate of the packing material.

This also has the effect of reducing the amount of deformation required to maintain the plane of the frame due to the generation of excessive reaction force.

Next, generally speaking, expansion of the frame that applies tension to the thin plate is sufficient in one direction, and in this case, the movement of the thin plate in the direction where stress is not introduced must be free to expand and contract, as well as the axial reaction from the thin plate. The sliding material acts to prevent the movement of the frame, which may be slightly deformed due to force, from being transmitted.

In the case of expansion of the above auxiliary frame, the same effect exists.

Additionally, functions such as watertightness, airtightness, and displacement absorption functions can be freely added to the panel edges.

(Example) Examples of the present invention will be described in detail below with reference to the drawings. In the example shown in FIG. 1, (1) is an FJ slope, and the four sides are bent in advance to provide a raised part (1') for draining.

In (2), the thin plate is attached to the frame, which is a member with sufficient rigidity, and the straight member is joined at the joining part with a member such as a sleeve (3) that can be expanded and contracted and can ensure the rigidity and strength of the joint part. (2) joined by sleeve (3) on thin plate (1)
After setting the frame, fix the thin plate to the two opposing sides of the expanding frame with screws (4), etc., then apply force to the frame (2) in the direction of the arrow to expand the inside of the frame, and place it on the thin plate as specified. After confirming that the stress has been applied, frame (2), ! Fix the sleeve (3) and the sleeve (6) by welding or the like at the joint part of (6). You can do the same for the other two frames that are orthogonal to each other if necessary, but in general
Due to the reaction force of the thin plate stress, the frame (2) has a middle wheel (
7), the thin plate receives a reaction force and is slightly deformed outward in a concave manner, so 2. As stated in claims (6) and (8) (the frame and the thin plate may be slid without being joined.The stress to be introduced is
The target stress is about one-half of the yield point stress, but taking into account the coefficient of thermal expansion of the thin plate and frame, the temperature reached, etc., the stress should be set to a level that will not cause fatigue fracture due to repeated stress.

The method for expanding the frame is the expansion force ja.In the horizontal built-in method, as an example, as shown in Figure 1 (perspective view) and Figure 2 (interior view), the reaction force receiver provided with a screw in the frame (2) is made of a material ( 5') to 6r
etc., and then rotate the screw (5) to the right and push the sleeve (3), so that the frame (2) and the mounting point (
4) to generate stress in the thin plate (1).

After confirming that the generated axial force is within the specified range using the screw rotation angle method, screw rotation force method, etc., frame (2) and sleeve (3)
) at part (6) etc. by welding, etc. Also, as shown in Figure 3 (using a screw shaft with a reverse thread, it may be expanded simultaneously in two directions perpendicular to each other. In this case, the expansion ratio in the two directions is determined by the angle with respect to the frame of the screw center. The right side of the figure Needless to say, this is done in the same way at the same time.In the K1 method for frame expansion, as shown in Figures 4 and 5, the reaction force receiving material (5') fixed to the frame (2) and the sleeve (3) ), the force i (E) applied to After confirming that the joint sleeve (3) and frame (2) are in Another advantage is that it can be fixed after observing and confirming the condition of the frame and frame. Note that (A) is a rigid and perfectly flat floor stand, and (a) protects the thin plate (1) and ) and the floor stand (A), a sheet material that reduces friction when applying force, (B) is the frame (
2) It is a jig frame that is pressed against the floor stand (A), and the screw shaft (C) is rotated and the frame (2) is pressed through the sliding material (b).
The frame may be held down to reduce the friction of the movement of the frame when force is applied, and to fix the frame while maintaining an accurate plane.

As shown in FIG. 6, a reinforcing plate (7) may be welded to increase the rigidity of the sleeve joint.

An example of the case of claim 2-(4) is shown in Figure m7. In this method, the frame is tightened in advance with a turnbuckle (8), and the thin plate is attached by inscribing it in the processed part (4), and then the turnbuckle is loosened and the thin plate is tensed and stretched to the dimension (d). An example of a configuration using an auxiliary frame in claim 2-(7), which features stress, is shown in FIG. 8, FIE diagram, and @10 diagram.

In the above three cases, depending on the capacity of the packing material,
The applied force on the frame may be small and a low stress may be sufficient, but in order to make the error zero and obtain a predetermined residual stress, the frame must be movable, and this falls within the scope of the present invention. It is.

The above three examples comprehensively constitute the following items (2), (6), (7), (8), and (9) in the scope of the claims.

The m8 diagram is an example of a joint between panels using the so-called isometric method, with the upper diagram showing a vertical cross section and the lower diagram showing a horizontal cross section.

In other words, the auxiliary frame (10) made of extruded aluminum, etc., in which the packing material (9) is fitted onto the screw shaft (2) and the screw (
11) etc., and attach the sliding material (1) to this auxiliary frame (10).
2) and attach the thin plate (1) with screws (4) or the like.

The surface of the auxiliary frame that comes into contact with the bent part of the thin plate (1) has an appropriate arcuate surface to prevent excessive processing strain or scratches from occurring in the bent part of the thin plate, and to prevent residual stress in the thin plate (1). Prevent fatigue rupture from occurring due to concentration at the bent part. The auxiliary frame (10) is in contact with the frame (2) a (13
) and the packing material (9) are in contact with the frame (2). The position of the contact line (13) of this auxiliary frame may be a circular arc or the like so as to easily allow small angle rotation around the screw shaft (11), but it may also be determined by deformation of the auxiliary frame only. be. In addition, the pre-provided protrusion of the auxiliary frame (10) and the frame (
2) During the deformation limit F! (10') is provided.

When the frame (2) is expanded in the direction of the arrow, the auxiliary frame (10) rotates slightly around (13) 11 through the packing material (9), transmitting tension to the thin plate (1), and - The packing material (9) is compressed by the reaction force. Packing material (
9) uses materials with high performance such as heat resistance, low-temperature embrittlement resistance, and compression set resistance, such as high-strength silicone heat-vulcanized rubber, and also has a pressure resistance of 30 times or more than the thickness of the thin plate. The frame (2) is fixed in a state in which a residual stress is applied to the thin plate by a reaction force in a transparent compressibility range of about 1020% when the frame (2) is expanded. The gap (10') is predetermined to be the gap where the protrusion comes into contact with the frame (2) and becomes a stopper when the rubber or the like is compressed to the limit of the long-term allowable compression ratio.

Thus, when the panel is installed, due to the subsequent drop in external temperature, the thin plate becomes thicker than the frame (if it shrinks, the packing material will be further compressed, but the pre-established gap FJ between the packing material (9) and the auxiliary frame will decrease). (9°), the shape change is restrained and an extremely high compressive reaction force is generated, which is balanced by the fact that the residual stress in the thin plate further increases, but the stress generated in the thin plate is considerably reduced. Therefore, the thin plate will not undergo fatigue fracture. Even if the deformation limit Fl (10') becomes zero, the packing material is maintained within the maximum allowable compressive deformation.

Next, when the thin plate (1) becomes thicker (expands) than the frame (2) due to an increase in the external 5 degrees, solar radiation, etc., the residual stress in the thin plate decreases,
Due to the large elastic recovery of the packing material, the surface flatness is not compromised.

In response to the above movements, the large coefficient of thermal expansion of the rubber used as the packing material works to its advantage, although it is small.Additionally, as a characteristic of rubber, the increase in elasticity at high temperatures also works to its advantage at high temperatures.

In the above case, it is important that the auxiliary frame has the effect of averaging the reaction force from the thin plate over the entire packing surface.

For the packing material, use a material that has an effect similar to rubber, or conversely, if the thermal expansion of the thin plate is less than that of the frame, use a shape memory alloy that expands at low temperatures and shrinks at high temperatures. It can also be used.

Next, by attaching the thin plate (1) to the auxiliary frame (10) via the sliding material (12), the thin plate (1) and the auxiliary frame (
! In this case, the sliding material between 2) is to prevent the expansion and contraction of the auxiliary frame (12) from being transmitted to the thin plate (1). The mounting number can be determined using the screw (4). 'Furthermore, the auxiliary frame serving as the panel joint is provided with an airtight material (20), drainage material (21), etc. mainly made of synthetic rubber or the like. Draining material (21) is draining presser metal fitting (22)
It also serves as a watertight packing material for the mounting screw (23) and a watertight cover for the mounting screw (4) of the thin plate (1). (
24) is a highly durable sealing material such as silicone sealing material, and shows the effectiveness of the clever auxiliary frame, such as blocking water ingress from the gaps between the joint surfaces of each village.

(25) is a backing plate that prevents local deformation of the thin plate due to impact or the like. Note that the taper (14) at the outer tip of the auxiliary frame (10) is in contact with the auxiliary frame! When rotating around (13), the tip of the auxiliary frame comes into contact with the thin plate, preventing deformation of the thin plate.

FIG. 9 is an example of using the auxiliary frame according to claim 2 (5), where the frame (2') is a fixed Bt frame without a joining sleeve for expanding the frame. , the upper part is attached to the frame (2') by screws (17) and the frame (
2') as a reaction force material in the direction of the arrow, residual stress is applied to the thin plate (1) via the packing material (9) and the auxiliary frame (101).

The figure below shows an example in which the auxiliary frame (102) is directly attached to the frame (2°), and the auxiliary frame (15') applies force only to the packing material. This type of method also includes a method in which there is no packing material, or a method in which the auxiliary frame is directly pressed without a force-applying auxiliary frame or LF packing material.

Waterproofing is done using ordinary sealing materials. (27) is back-up material, (2B) is sealing material between panels, (
28) is a back-up stopper and a presser for fixing a thin plate,
(24) is the joint surface water sealing of each village. (10
') is a gap, and (14)' is a taper.

Figure 10 also shows an example of a method in which the auxiliary frame is expanded using the fixed frame (2゛) as the reaction force receiver, and the auxiliary frame (1
04) is tangent! (13') as the fulcrum and the mounting screw (13') as the fulcrum.
It is a lever with 1) as the point of application, and the fixed screw shaft and screw (
11) and rotate it from the dotted line position to the solid line position around point (p) of the auxiliary frame and point (13") of the auxiliary frame to compress the packing material (9) and tighten the thin plate (1).
) gives residual stress to (103″) and (104′)
is a fitting guide for both auxiliary frames, and is also a member that maintains the rigidity of the auxiliary frames. (91) is a packing rubber and has the same effect as (9). In this case, the gap is (10'
).

The feature of this method is that it can apply force using the T/S ratio shown in the figure, so adjustment is easy. This also includes a method in which there is no packing, auxiliary frame, etc., and a thin plate is attached directly to the force-applying frame.

(Effects of the Invention) As explained above, the construction panel production method according to the present invention can be used to produce thick aluminum plates, large extrusion sheets, etc. using thin plates, common and inexpensive fI4 frames, small aluminum shapes, packing materials, etc. It is possible to provide architectural panels with consistently high flatness accuracy equivalent to or better than those using form frames or aluminum honeycomb structures at a low cost. The thin plate is a general aluminum plate, 5u
S304 stainless steel plate, fluorocarbon resin precoat FF4
Temporary "F" can also be thinner than usual, and because of its strength, it has higher strength (and is extremely corrosion resistant), as well as the higher grade 5us316 stainless steel G4@, fluorocarbon pre-coated aluminum temporary and the same stainless steel plate. In addition, titanium plates, which have a unique color tone but are very expensive, can now be used in architectural panels.

At the same time, the flatness is extremely high, so metal base finishes, high-gloss paints, and metal-like paints are less likely to cause unsightly uneven reflections, making it possible to achieve advanced architectural design effects and create expressions that are not conventional. Become.

In particular, it is most effective when integrated with designs using highly reflective glass, which has recently been developed.

Highly reflective glass depends on design and energy savings requirements, but reflective panels may also offer energy savings benefits by reducing cooling loads.

In addition, the above-mentioned metals and surface coatings have high corrosion resistance and stain resistance, so they can be maintenance-free for a long period of time, reducing the building's recurring costs. The effect on the design expression of a building is, in other words, an economic effect, and by combining the reduction in operating expenses and the reduction in panel production costs, it is possible to realize a building with extremely high economic effects.

In this invention, the thin plate is not limited to Gold 11&, but can also be applied to tetrafluorocarbon resin coated glass fiber sheets and gold AIA products, and has the performance required for building panel joints. It is possible to make sufficient grooves, and it can be easily manufactured in a factory with normal machining accuracy.
Very nurturing.

[Brief explanation of drawings]

The drawings show the basic idea and an example of the implementation plan of the present invention. Fig. 1 is a perspective view showing the basic idea, Fig. 2 is an elevational view of the interior, and Fig. 3 is an internal view of the joint frame. Figure 4 is a plan view of a basic example of the 88 method for frame expansion, Figure 5 is a sectional view of the same as above, Figure 6 is an internal elevation view of reinforcement of the frame joint, and Figure 7 is the bending stress of the frame. Figure m8 is a vertical cross-sectional view (upper figure) and horizontal cross-sectional view (lower figure) of the panel joint using the method using an auxiliary frame and puff kink material, and Figures 9 and *10 are the auxiliary frame expansion method. It is sectional drawing which shows two examples. (1) 'fil board, (2) frame, (2'') frame (fixed)
. (3) Sleeve, (4) Thin plate weighted point (screw, weld), (5) Screw (for frame expansion). (5') The reaction force receiver is made of material. (6) The frame is fixed and welded. (8) Turnbuckle; (9) Puff kink material. (9') Gap, (10) Auxiliary frame, (10'') Deformation limit IM, (it) Auxiliary frame installation screw, (12
) sliding material, (13) tangent, (14) taper,
(15) Loading auxiliary frame, (104> Loading auxiliary frame (lever)

Claims (9)

[Claims] (1) A method of manufacturing architectural panels by attaching generally rectangular thin metal or membrane material (referred to as a thin plate) to a structural frame material (referred to as a frame) of the panel along the outer periphery of the thin plate. After attaching the thin plate to a shape that can be attached to the frame by bending two or four sides, applying an expansion force in one or two axes in the plane of the thin plate to the frame itself, The thin plate and the frame are fixed in a state where stress is generated due to mutual reaction force, and the thin plate is approximately below the yield point, and is 1/2 of the yield point.
A method for producing an architectural panel, which comprises producing a panel with high flatness in a plane constituted by a frame by tensioning a thin plate with residual stress to the extent that the desired degree of stress remains. (2) A method of applying expansion force to the frame described in item (1) above, in which, as an example, a joint sleeve member and a screw device such as a screw, a screw shaft, a reaction force receiving member, etc. are attached to the joint part of the frame itself. It is assembled into a built-in structure, and the frame joint is expanded outward parallel to the thin plate surface by the rotation of the screw shaft, and after applying mainly axial compressive force to the frame material in the pressurized axial direction, the joining sleeve etc. is welded, etc. 2. The method of manufacturing a construction panel according to claim 1, wherein the frame itself has an expansion force mechanism built-in, such as by fixing it with a frame. (3) A method for applying expansion force to the frame as described in item (1) above, in which the built-in screw device in item (2) is removed from the frame after generating a reaction force and fixing the sleeve; Alternatively, the method for manufacturing a construction panel according to claim (1), characterized in that the frame expansion device is replaced with a frame expansion device equipped with an adjustment device such as a hydraulic pressurization device. (4) A method of applying expansion force to the frame described in item (1) above, which involves temporarily fixing the frame by applying compressive strain (prestress) to the frame in advance with a high-tensile steel screw shaft, hydraulic device, etc. After applying compression and bending strain, such as by bending the frame into an arc with a buckle, etc., and attaching a thin plate to the frame, the frame is expanded by partially releasing the frame stress, such as by loosening the screw shaft, turnbuckle, etc., and the expansion force is applied. . The method of manufacturing a construction panel according to claim 1, wherein the expansion dimension is adjusted. (5) A method of applying residual stress to the thin plate as described in item (1) above, in which the frame is made fixed from the beginning, an auxiliary frame is inserted between the frame and the thin plate attachment part, and the frame is A method of manufacturing a construction panel according to claim 1, characterized in that the auxiliary frame is expanded in an out-of-plane direction parallel to the plane of the thin plate as a force-receiving member. (6) A method for manufacturing the panel set forth in item (1) above, which prevents sliding to release the expansion/contraction difference based on the temperature difference and thermal expansion coefficient difference between the frame and the thin plate, and to avoid generating impact noise when sliding. It is characterized by inserting a sliding material between the frame and the thin plate to prevent corrosion and prevent the bending of the frame due to out-of-plane wind pressure, thermal stress, and residual stress from being transmitted to the thin, smooth thin plate. A method for producing a construction panel according to claim (1). (7) In item (1) above, between the frame and the thin plate of the thin plate attachment part on two or four sides along the outer periphery of the thin plate, there is a temperature difference or heat between the thin plate and the frame after the panel is manufactured. Due to the difference in expansion rate,
In order to prevent fatigue rupture of the thin plate due to repeated excessive increases in the in-plane stress of the thin plate, and loosening of tension in the plane of the thin plate due to an excessive decrease in the residual stress of the thin plate, the coefficient of thermal expansion is much higher than that of the thin plate or frame material. Claim No. 1, characterized in that a packing material having a shape of a material having a modulus of elasticity or deformation ability due to an appropriate temperature, sufficient strength and long-term durability under general environment is directly inserted. 1) Method for producing architectural panels as described in section 1). (8) Items (5), (6), and (7) above are characterized in that when installing the sliding material or packing material, an auxiliary frame is provided around the frame in addition to the frame and thin plate. A method for manufacturing a construction panel according to claim (1). (9) On each side of the architectural panels in item (1) above, the thin plates and frames, and the auxiliary frames in items (5), (7), and (8), shall be watertight at the joints between panels. It is characterized by providing the necessary shape to provide the necessary functions to the joints, such as airtightness, sound insulation, fire protection, and release of movement caused by deformation of panels due to thermal expansion and contraction, wind and earthquakes, and relative displacement of panels. A method for manufacturing a construction panel according to claim (1).