Building panels, building fixtures equipped with these building panels, and methods for manufacturing building panels

Abstract

To improve sound insulation performance.SOLUTION: An architectural panel includes: a front panel 21 and a back panel 22 which are arranged in a spaced-apart manner in a panel thickness direction; a front side inner bone 27 which is in contact with an inner surface of the front panel 21; and a back side inner bone which is in contact with an inner surface of the back panel 22. The front side inner bone 27 and the back side inner bone 28 are arranged in a spaced-apart manner in the panel thickness direction and have reinforcing pieces 27b and 28b, respectively, protruding inwardly in the panel thickness direction. The front side inner bone 27 and the back side inner bone 28 act as a medium to prevent vibration and sound from being transmitted and to prevent vibration and sound from increasing due to resonance between front and back side members.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to building fixtures (including doors, windows, shoji, etc.), building panels used as partitions, shutter curtains, etc., fixture devices equipped with such building panels, and manufacturing methods for building panels.

Background Art

[0002] Conventionally, in this type of invention, as described in Patent Document 1 for example, a plurality of cross-sectional groove-shaped steel ribs extending in the vertical direction are provided at intervals in the width direction between a front plate and a back plate spaced apart in the door thickness direction, and a metal door reinforced so as not to cause bending or the like is provided.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, according to the above prior art, when there is a noise source on the outdoor side or the indoor side, the rib functions as a sound bridge that transmits sound as vibration, and there is a possibility that the sound of the noise source is transmitted from the front plate to the back plate or from the back plate to the front plate.

Means for Solving the Problems

[0005] In view of such problems, the present invention has the following configuration. A front plate and a back plate spaced apart in the panel thickness direction, a front side middle rib in contact with the inner surface of the front plate, and a back side middle rib in contact with the inner surface of the back plate, wherein the front side middle rib and the back side middle rib are There should be no contact between the front and back central bones. provided apart in the panel thickness direction, The front-side central rib has a contact piece that contacts the inner surface of the front panel, a reinforcing piece that protrudes inward in the panel thickness direction from one end of the contact piece in the width direction, and a reinforcing piece that protrudes in the panel thickness direction from the other end of the contact piece in the width direction; the back-side central rib has a contact piece that contacts the inner surface of the back panel, and a reinforcing piece that protrudes in the panel thickness direction from one end of the contact piece in the width direction; the reinforcing piece provided on the back-side central rib is located between the two reinforcing pieces provided on the front-side central rib. characterized in that it is a building panel. [Effects of the Invention]

[0006] As described above, the present invention is configured to improve sound insulation performance. [Brief explanation of the drawing]

[0007] [Figure 1] This is a front view showing a building fixture device equipped with an example of a building panel according to the present invention, with the main part cut out to show the internal structure. [Figure 2] This is a disassembled perspective view of the panel of the same joinery device. [Figure 3] This is a cross-sectional view showing an example of a building panel according to the present invention. [Figure 4] (a) is an enlarged cross-sectional view of a key part of the building panel. (b) and (c) are enlarged transverse cross-sectional views of key parts showing other examples of the building panel according to the present invention, respectively. [Figure 5] These graphs and tables show the results of measuring the acoustic equivalent loss for the building panel according to the present invention. [Figure 6] The upper diagram is a cross-sectional view of a conventional building panel, while the lower graph and table show the results of measuring the acoustic equivalent loss for that building panel. [Modes for carrying out the invention]

[0008] This embodiment discloses the following features: The first feature is that it comprises a front panel and a back panel spaced apart in the panel thickness direction, a front-side central rib in contact with the inner surface of the front panel, and a back-side central rib in contact with the inner surface of the back panel. The front-side central rib and the back-side central rib are spaced apart in the panel thickness direction and have reinforcing pieces that protrude inward in the panel thickness direction, thus forming an architectural panel (see Figures 1 to 4).

[0009] A second characteristic is that the natural frequencies of the front side members, including the top plate and the front side ribs, are different from the natural frequencies of the back side members, including the back plate and the back side ribs.

[0010] As a third feature, the reinforcing pieces of the front middle rib and the reinforcing pieces of the back middle rib are different in position in the panel surface direction (see FIGS. 2 to 4).

[0011] As a fourth feature, the front middle rib and the back middle rib are different in the number of the reinforcing pieces (see FIGS. 2 to 4).

[0012] As a fifth feature, the reinforcing pieces of the front middle rib and the reinforcing pieces of the back middle rib each have a bent piece portion bent in the panel surface direction on the protruding end side of the protruding piece portion protruding inward in the panel thickness direction, and the bent piece portion of the front middle rib and the bent piece portion of the back middle rib are different in the length in the bending direction (see FIGS. 2 to 4).

[0013] As a sixth feature, the front middle rib and the back middle rib are different in thickness, and the building panel according to any one of claims 1 to 5 (see FIGS. 3 and 4).

[0014] As a seventh feature, the front middle rib and the back middle rib are asymmetric in shape in the panel thickness direction (see FIGS. 2 to 4).

[0015] As an eighth feature, the mass of the front-side member including the front plate and the front middle rib is different from the mass of the back-side member including the back plate and the back middle rib.

[0016] As a ninth feature, the area of the portion where the front middle rib contacts the front plate is different from the area of the portion where the back middle rib contacts the back plate (see FIGS. 3 and 4). [[ID=Z6]]

[0017] As a tenth feature, a force rib that contacts both inner surfaces is provided between the inner surface on the peripheral side of the front plate and the inner surface on the peripheral side of the back plate, and the area of the portion where the force rib contacts the inner surface of the front plate is different from the area of the portion where the force rib contacts the inner surface of the back plate (see FIGS. 3 and 4).

[0018] As an eleventh feature, an elastic body is provided between at least one of the front middle rib and the back middle rib and a portion facing the middle rib in the panel thickness direction (see FIG. 4(c)).

[0019] The twelfth feature is that a fitting device is configured by including the above building panel (see FIGS. 1 and 2).

[0020] The thirteenth feature is a method for manufacturing the above building panel, which includes at least one of the steps of joining the front side middle rib to the front plate and joining the back side middle rib to the back plate.

[0021] The fourteenth feature includes a step of joining the front side middle rib and the back side middle rib inside the frame of the frame-shaped member to form an integral member unit, and laminating and joining the front plate, the member unit, and the back plate.

[0022] As the fifteenth feature, the joining includes joining by welding.

[0023] As the sixteenth feature, the joining includes adhesion with an adhesive interposed therebetween.

[0024] <Specific Embodiment> Next, a specific embodiment having the above features will be described in detail based on the drawings. In this specification, the panel thickness direction means the thickness direction of the building panel (door body). Also, the panel surface direction means the direction in which the front or back surface of the building panel extends. This panel surface direction includes the panel width direction, the panel vertical direction, and the like. Also, in this specification, for convenience, the outdoor side is expressed as the front side and the indoor side as the back side, but the front-back relationship can be reversed.

[0025] FIGS. 1 and 2 show a fitting device including an example of the building panel according to the present invention. This fitting device 1 includes a rectangular frame-shaped frame body 10, a door body 20 (building panel) that opens and closes an opening inside the frame, and a hinge 30 that opens and closes the door body 20 by rotating it on the door butt side.

[0026] The frame 10 is configured in a rectangular shape by comprising horizontal frame members 11 and 12 spaced apart vertically and vertical frame members 13 and 14 spaced apart horizontally, and is fixed to an opening in the structure of a building or the like. The horizontal frame members 11 and 12 and the vertical frame members 13 and 14 are each formed from a hard metal material in a long, straight shape. These are integrated by welding or other means.

[0027] The door body 20 constitutes an example of a building panel according to the present invention. The door body 20 comprises a front panel 21 and a back panel 22 spaced apart in the panel thickness direction (in the illustrated example, the door thickness direction), upper and lower left and right reinforcing ribs 23, 24, 25, and 26 located between the inner surfaces of the peripheral edges of the front panel 21 and the back panel 22, a front side central rib 27 fixed along the inner surface of the front panel 21, a back side central rib 28 fixed along the inner surface of the back panel 22, and a core material 29 filled in the space between the front panel 21 and the back panel 22.

[0028] The front plate 21 and the back plate 22 are each formed from a hard metal material in a roughly rectangular shape when viewed from the front. The front plate 21 in the illustrated example has folded portions 21a at its upper end and left and right ends that are bent toward the back plate 22 (see Figure 2). Similarly, the back plate 22 also has folded portions 22a at its upper end and left and right ends that are bent toward the front plate 21.

[0029] The upper and lower reinforcing ribs 23 and 24 are each formed from a hard metal material into long, channel-shaped steel sections. These reinforcing ribs 23 and 24 are located at the upper and lower ends, respectively, between the front plate 21 and the back plate 22. Both of these reinforcing ribs 23 and 24 are fixed in contact with the inner surfaces of both the front plate 21 and the back plate 22.

[0030] The left and right reinforcing bones 25 and 26 are each formed in an elongated shape from a hard metal material and are both fixed in contact with the inner surfaces of both the front plate 21 and the back plate 22. These reinforcing bones 25 and 26 have different surface areas in contact with the inner surface of the top plate 21 and in contact with the inner surface of the back plate 22.

[0031] More specifically, the reinforcing rib 25 on the door edge side is formed in a substantially concave cross-section, having a long, plate-shaped door edge side portion 25a extending in the vertical direction, a curved portion 25b bent toward the door edge direction on one side of the door edge side portion 25a in the panel thickness direction, and a curved portion 25c bent toward the door edge direction on the other side of the door edge side portion 25a in the panel thickness direction (see Figures 2 to 4). Furthermore, one curved portion 25b has a larger dimension in the panel thickness direction than the other curved portion 25c. Therefore, the area in contact between the curved portion 25b and the inner surface of the front panel 21 is larger than the area in contact between the curved portion 25c and the inner surface of the back panel 22.

[0032] The reinforcing bone 26 on the door-end side is formed in a cross-sectional shape symmetrical to the reinforcing bone 25 on the door-front side, and has a door-end side piece 26a, one curved piece 26b, and the other curved piece 26c. Furthermore, one curved portion 26b has a larger dimension in the panel thickness direction than the other curved portion 26c, and the area in contact with the inner surface of the front panel 21 is larger than the area in contact with the inner surface of the back panel 22 of the other curved portion 26c.

[0033] The front-side central support 27 and the back-side central support 28 are provided as a pair, spaced apart in the panel thickness direction with a gap between them. There is no contact between the front-side central support 27 and the back-side central support 28. As shown in Figure 3, these front-side central ribs 27 and back-side central ribs 28 are provided in multiple sets (two sets in the illustrated example) spaced apart in the panel width direction, dividing the space between the door leading edge and the door trailing edge.

[0034] The front and back central bones 27 and 28 of each pair differ in shape, thickness, and mass. Furthermore, the front and back central ribs 27 and 28 of each set have reinforcing pieces that protrude inward in the panel thickness direction at different positions in the panel surface direction (door width direction in the illustrated example) (see Figure 3). The number of reinforcing pieces on the front central rib 27 is different from the number of reinforcing pieces on the back central rib 28.

[0035] More specifically, the front-side central rib 27 has a contact piece 27a that is in flat contact with the inner surface of the front panel 21, a reinforcing piece 27b that extends inward in the panel thickness direction from one end of the contact piece 27a in the width direction, and a reinforcing piece 27c that extends in the panel thickness direction from the other end of the contact piece 27a in the width direction. The contact piece 27a is bonded or welded to the inner surface of the front panel 21 and is continuous in a long length extending in the vertical direction. According to this embodiment, the thickness t1 of the front-side central rib 27 is approximately 1.6 mm.

[0036] One of the reinforcing pieces 27b has a protruding piece 27b1 that projects inward in the panel thickness direction, and a curved piece 27b2 that is bent inward in the panel width direction along the panel surface at the end of the protruding piece 27b1. The other reinforcing piece 27c is formed in a flat plate shape with a greater protrusion than the protruding piece 27b1. Neither of the two reinforcing pieces 27b and 27c are in contact with the other back-side members (back plate 22 and back-side central rib 28).

[0037] Furthermore, the back support frame 28 has a contact piece 28a that contacts the inner surface of the backing plate 22 in a flat manner, and a reinforcing piece 28b that protrudes in the panel thickness direction from one end of the contact piece 28a in the width direction, and the contact piece 28a is bonded or welded to the inner surface of the backing plate 22 to form a long, continuous piece extending in the vertical direction. The area in contact between the contact piece 28a and the inner surface of the back plate 22 is larger than the area in contact between the contact piece 27a and the inner surface of the front plate 21.

[0038] The thickness t2 of the posterior core 28 is greater than the thickness of the posterior core 27, and according to this embodiment, it is approximately 2.3 mm. The mass of the posterior core 28 is greater than the mass of the posterior core 27.

[0039] The reinforcing piece 28b has a protruding portion 28b1 that projects inward in the panel thickness direction, and a curved portion 28b2 that is bent in the panel width direction along the panel surface at the end of the protruding portion 28b1. The reinforcing piece 28b is positioned between the two reinforcing pieces 27b and 27c of the front side core 27, so as not to come into contact with the members on the front panel 21 side (front panel 21 and front side core 27). This arrangement of reinforcing pieces prevents interference between the reinforcing pieces and allows for a large amount of protrusion in the panel thickness direction of each reinforcing piece, thereby improving the effect of suppressing the deflection of the front panel 21 and back panel 22.

[0040] The curved portion 27b2 of the front-side rib 27 and the curved portion 28b2 of the back-side rib 28 have different lengths in the bending direction (panel width direction), and in the illustrated example, the length of the curved portion 27b2 is smaller than the length of the curved portion 28b2.

[0041] The core material 29 is made of glass wool, foamed resin, or paper such as corrugated cardboard. This core material 29 is filled between the reinforcing rib 25 on the door edge side and the front side intermediate rib 27, between the front side intermediate ribs 27 on both sides, and between the reinforcing rib 26 on the door edge side and the front side intermediate rib 27, etc. This core material 29 is provided for purposes such as improving sound insulation and heat insulation, suppressing vibration, and increasing strength, but it can also be omitted.

[0042] In the above configuration, the door body 20 has a front panel 21 and a back panel 22 that are symmetrical and substantially the same shape and thickness in the panel thickness direction, while the front side central frame 27 and the back side central frame 28 are asymmetrical in the panel thickness direction and have different thicknesses. Therefore, the door body 20 has different masses for its front components, such as the front panel 21 and front frame 27, and for its back components, such as the back panel 22 and back frame 28. In the illustrated example, the mass of the front components (front panel 21 and front frame 27) is smaller than the mass of the back components (back panel 22 and back frame 28).

[0043] Furthermore, due to differences in the configuration of the front and back sides of the door body 20, such as the aforementioned differences in mass, the shape of the front central frame, the number of reinforcing pieces, and the thickness, the natural frequencies of the front member and the back member are different. According to the illustrated example, the natural frequency of the front-side member is greater than the natural frequency of the back-side member.

[0044] The hinge 30 supports one piece 31 and the other piece 32 so that they can rotate freely around the shaft 33, and is sometimes referred to as a hinge or the like. The hinge 30 in the illustrated example is a well-known flag hinge. This hinge 30 is configured such that the shaft portion 33 is positioned between the door body 20 and the vertical frame member 14, with one piece 31 fastened to the door body 20 and the other piece 32 fastened to the vertical frame member 14 (see Figure 2). Other examples of this hinge 30 include flat hinges, pivot hinges, and twin-axis hinges.

[0045] In the diagram, reference numeral 41 denotes a door knob for opening and closing the door body 20, reference numeral 42 denotes a thumbturn for locking or unlocking the door body 20 when it is fully closed, and reference numeral 43 denotes a locking mechanism that extends and retracts the latch bolt and deadbolt by operating the door knob 41 and thumbturn 42.

[0046] The characteristic functions and effects of the door body 20 (architectural panel) and the joinery device 1 with the above configuration will be explained in detail. In the door body 20, the front-side central frame 27 and the back-side central frame 28 are provided separated in the panel thickness direction, so that these front-side central frame 27 and back-side central frame 28 act as a medium to prevent the transmission of vibrations and sound. Furthermore, due to differences in shape, mass, and thickness between the front and back ribs 27 and 28, the natural frequencies of the front members, including the front plate 21 and front ribs 27, and the natural frequencies of the back members, including the back plate 22 and back ribs 28, are different. This prevents vibrations and sounds transmitted in the panel thickness direction from increasing due to resonance between the front and back members. Furthermore, by setting the contact area of ​​the reinforcing ribs 25, 26, the front side central rib 27, and the back side central rib 28 with respect to the top plate 21 and back plate 22, and by using a unique reinforcing piece shape, it is possible to suppress the bending of the top plate 21 and back plate 22 in a curved shape in cross-section, and to effectively prevent vibrations accompanied by the aforementioned bending, as well as resonance between the top plate 21 and back plate 22.

[0047] <Example of comparative experiment> Next, we will explain the results of measuring the sound transmission loss under the same conditions for a building fixture 1 equipped with the door body 20 described above and a building fixture equipped with a conventional door body. In this experiment, a sound source was placed on one side of the door body and a microphone on the other side.

[0048] Figure 5 shows a graph and a table illustrating the sound transmission loss for each 1 / 3 octave frequency for a building fixture 1 equipped with the door body 20 described above. Figure 6 shows a graph and table illustrating the sound transmission loss for each 1 / 3 octave frequency of a conventional door frame 120, with the upper figure being a cross-sectional view of the door frame. The door frame 120 is modified from the door frame 20 by replacing the reinforcing ribs 25 and 26 with reinforcing ribs 125 that have a U-shaped cross-section, and replacing a pair of front-side intermediate ribs 27 and back-side intermediate ribs 28 with intermediate ribs 127 that have the same shape as the reinforcing ribs 125. Both these reinforcing ribs and intermediate ribs connect the front and back panels. The space between the front panel 21 and the back panel 22 is provided with the aforementioned core material 29, but it is not shown in the figure.

[0049] The results of this comparative experiment showed that the joinery device 1 equipped with the door body 20 had greater sound transmission loss at all frequencies compared to the joinery device equipped with the conventional door body 120. In other words, the joinery device 1 equipped with the door body 20 has higher sound insulation than the joinery device equipped with the conventional door body 120.

[0050] <Variation> The front and back central bones 27 and 28 (Figure 4(a)) of the above embodiment can be modified in shape as appropriate. For example, the door body 20' shown in Figure 4(b) is the same as the door body 20, but with the front-side central rib 27 replaced by the front-side central rib 27'. The front-side central rib 27' is formed in an inverted hat shape in cross-section, integrally having a contact piece 27a' that contacts the inner surface of the front panel 21 in a flat manner, and reinforcing pieces 27b' and 27c' that protrude inward in the panel thickness direction from both ends of the contact piece 27a' in the width direction, respectively, and its thickness is smaller than that of the back-side central rib 28. Each reinforcing piece 27b', 27c' is formed in an inverted L-shape with its tip curving outward in the panel width direction. One reinforcing piece 27b' and the other reinforcing piece 27c' have different amounts of protrusion in the panel thickness direction. According to the door body 20' shown in Figure 4(b), substantially the same effects and advantages as those of the door body 20 can be obtained.

[0051] As another example, an elastic body may be provided between at least one of the front-side ribs 27 and the back-side ribs 28 and the portion of the rib facing the panel thickness direction. For example, the door body 20'' shown in Figure 4(c) has elastic bodies 51 and 52 sandwiched between the reinforcing piece 27b of the front side central frame 27 and the contact piece 28a facing the reinforcing piece 27b, and between the reinforcing piece 28b of the back side central frame 28 and the contact piece 27a facing the reinforcing piece 28b, respectively. The elastic bodies 51 and 52 are made of synthetic rubber, elastomer resin, elastic foamed resin, etc., and are provided continuously or partially in the vertical direction. With this door body 20", the vibration of the front plate 21 and back plate 22 in the thickness direction can be suppressed by the elastic bodies 51 and 52.

[0052] Furthermore, according to the above embodiment, the reinforcing piece 28b of the back side core 28 is positioned offset in the panel width direction relative to the reinforcing pieces 27b and 27c of the front side core 27, thereby ensuring a large amount of protrusion for each reinforcing piece. However, as an alternative example, the reinforcing pieces of the front side core 2 and the reinforcing pieces of the back side core 2 may be positioned at the same location in the panel width direction, creating a gap between the opposing reinforcing pieces.

[0053] Furthermore, although the building panel according to the above embodiment is configured as a door body 20, this building panel can be applied to fixtures such as sliding doors, folding doors, windows, shoji screens, partitions, shutter curtains, etc.

[0054] <Manufacturing method for building panels> Next, the manufacturing characteristics of the building panel (door body 20) with the above configuration will be described in detail.

[0055] One example of this manufacturing method includes the steps of joining the front central rib 27 to the inner surface of the front plate 21, and arranging the back central rib 28 so as to be close to and separated from the front central rib 27, and joining the back central rib 28 to the back plate 22. In these processes, the joining can be done by welding, but it is also possible to use adhesive bonding (including double-sided tape and adhesives) as an intermediary. On the other hand, the upper, lower, left, and right reinforcing bones 23, 24, 25, and 26 are combined and welded together in a rectangular frame shape with an opening in the center, thereby forming a single integrated frame-shaped structural member A1. Then, the front plate 21 to which the front central ribs 27 are joined, and the back plate 22 to which the frame-shaped structural member A1 and the back central ribs 28 are joined are superimposed with adhesive in between, and are integrated by being pressed from both sides in the thickness direction.

[0056] Another example of the above manufacturing method is to combine and join the upper, lower, left, and right reinforcing bones 23, 24, 25, and 26 in a rectangular frame shape with an open center by welding or the like to form an integrated rectangular frame-shaped aggregate material A1, and then to join the front side central bones 27 and the back side central bones 28 to the inside of this frame-shaped aggregate material A1 to form an integrated aggregate material unit A. After these steps, the front panel 21, the structural unit A, and the back panel 22 are overlapped with adhesive in between, and then pressed together from both sides in the panel thickness direction.

[0057] According to the above example and other examples of the manufacturing method, the front central rib 27 and the back central rib 28 can be held in a fixed state at a distance from each other, and the front plate 21 and the frame-shaped structural member A1, and the frame-shaped structural member A1 and the back plate 22 can be sufficiently pressed together to integrate them.

[0058] In a particularly preferred embodiment, if the adhesive used for bonding is a thermosetting adhesive and heating is also performed during the pressurization process, the thermal curing of the adhesive will allow for a stronger bond between the members.

[0059] <Variation> In the above manufacturing method, we have described configurations in which the front-side core ribs 27 and the back-side core ribs 28 are joined to the front plate 21 and the back plate 22, respectively, and configurations in which both the front-side core ribs 27 and the back-side core ribs 28 are joined to the frame-shaped aggregate A1. However, as another example, it is also possible to join one of the front-side core ribs 27 and the back-side core ribs 28 to the front plate 21 or the back plate 22, and the other to the frame-shaped aggregate A1.

[0060] In the above embodiment, the multiple joints can be joined using appropriate joining methods, such as all being welded, all being bonded, or some being welded and others being bonded.

[0061] Furthermore, while the above embodiment involves joining multiple members by welding or adhesive, other examples include joining some or all of the multiple members by screwing, riveting, fitting, etc.

[0062] Furthermore, the present invention is not limited to the embodiments described above, and can be modified as appropriate without altering the essence of the invention. [Explanation of Symbols]

[0063] 1: Joinery equipment 10:Frame body 20,20',20”: Door panel (architectural panel) 21: Top plate 22: Backing board 25,26: Strength bone 27,27': Outer side midbone 27b, 27c: Reinforcement piece 27b1: Protrusion part 27b2: Song piece part 28: Backside bone 28b: Reinforcement piece 28b1: Protruding piece 28b2: Song piece part 51, 52: Elastic body A: Aggregate unit A1: Frame-shaped aggregate

Claims

1. Front and back panels spaced apart in the panel thickness direction, The front side central rib in contact with the inner surface of the aforementioned front plate, It comprises a back side rib that is in contact with the inner surface of the back plate, The front and back side ribs are provided spaced apart in the panel thickness direction so that there is no contact between them. The front side central rib has a contact piece that contacts the inner surface of the front panel, a reinforcing piece that protrudes inward in the panel thickness direction from one end of the contact piece in the width direction, and a reinforcing piece that protrudes in the panel thickness direction from the other end of the contact piece in the width direction. The aforementioned back support has a contact piece that contacts the inner surface of the backing plate, and a reinforcing piece that protrudes in the panel thickness direction from one end of the contact piece in the width direction. A building panel characterized in that the reinforcing piece provided on the back side of the central rib is located between the two reinforcing pieces provided on the front side of the central rib.

2. The building panel according to claim 1, characterized in that the natural frequency of the front member including the front plate and the front side central frame is different from the natural frequency of the back member including the back plate and the back side central frame.

3. The reinforcing piece of the front side central rib and the reinforcing piece of the back side central rib each have a curved piece that is bent toward the panel surface direction at the tip end of the protruding piece that projects inward in the panel thickness direction. The building panel according to claim 1 or 2, characterized in that the curved portion of the front-side central rib and the curved portion of the back-side central rib have different lengths in the bending direction.

4. The building panel according to any one of claims 1 to 3, characterized in that the front side core and the back side core have different thicknesses.

5. The building panel according to any one of claims 1 to 4, characterized in that the mass of the front member including the front plate and the front side central frame is different from the mass of the back member including the back plate and the back side central frame.

6. The building panel according to any one of claims 1 to 5, characterized in that the area of ​​the portion of the front-side central rib that contacts the front panel is different from the area of ​​the portion of the back-side central rib that contacts the back panel.

7. The building panel according to any one of claims 1 to 6, wherein a reinforcing rib is provided between the inner surface of the peripheral edge of the front panel and the inner surface of the peripheral edge of the back panel, and the area of ​​the portion of the reinforcing rib that contacts the inner surface of the front panel is different from the area of ​​the portion that contacts the inner surface of the back panel.

8. The building panel according to any one of claims 1 to 7, characterized in that an elastic body is provided between at least one of the front side central bones and the back side central bones and the portion facing the central bone in the panel thickness direction.

9. The building panel according to any one of claims 1 to 8, characterized in that the space between the front panel and the back panel is filled with a core material, avoiding the space between the two reinforcing pieces provided on the front side central frame.

10. A building fixture device comprising a building panel according to any one of claims 1 to 9.

11. A method for manufacturing an architectural panel according to any one of claims 1 to 9, characterized in that it includes at least one of the steps of joining the front-side central frame to the front panel and joining the back-side central frame to the back panel.

12. A method for manufacturing an architectural panel according to any one of claims 1 to 9, characterized in that it includes the step of joining the front and back central ribs to the inside of the frame of a frame-shaped aggregate to form an integrated aggregate unit, and overlapping and joining the front plate, the aggregate unit, and the back plate.

13. The method for manufacturing building panels according to claim 11 or 12, characterized in that the joining includes joining by welding.

14. The method for manufacturing an architectural panel according to any one of claims 11 to 13, characterized in that the joining includes bonding with an adhesive interposed therebetween.

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