KR100569159B1 - Curved Panel for Sound Reflection Board and Method for Preparing the Same - Google Patents

Abstract

The present invention relates to a curved panel for an acoustic reflection plate and a method for manufacturing the same, the curved panel itself is made of a curved surface does not cause deformation, and is a light and durable curved panel for an acoustic reflection plate configured to be easy to handle and assembly and its manufacturing method It is about.

According to the present invention, the upper and lower panels of the panel are laminated or manufactured by bonding a curved surface by laminating a laminated board bonded with wood adhesive using two or three layers of plywood or MDF in a curved high frequency heat treatment mold. The honeycomb is placed between the upper plate and the lower plate, characterized in that the curved panel for the acoustic reflection plate made of a curved panel laminate integrated by pressing up and down by a hydraulic press.

Acoustic reflector, curved panel

Description

Curved Panel for Sound Reflection Board and Method for Preparing the Same}

Figure 1a is a cross-sectional view of a conventional acoustic reflection plate,

Figure 1b is a schematic diagram showing a coupling portion of the conventional acoustic reflection plate,
1C is a perspective view of a conventional acoustic reflector;

Figure 2a is a rear perspective view of the curved panel of the first embodiment of the present invention,
Figure 2b is a longitudinal sectional view of the curved panel of the first embodiment of the present invention;

3A is a perspective view of a curved panel of a second embodiment of the present invention;

Figure 3b is a longitudinal (A-A) cross-sectional view of the curved panel of the second embodiment of the present invention,

Figure 4a is a partial cutaway perspective view of the back of the wooden frame acoustic reflection board made using a curved panel second embodiment of the present invention,

4B is an enlarged view of portion D of FIG. 4A;

5 is a rear view of the assembled state of the present invention wood frame type acoustic reflection plate,

Figure 6a is an assembled state plan view of the present invention wood frame acoustic reflection plate,

FIG. 6B is an enlarged cross-sectional view of portion B of FIG. 6A; FIG.

FIG. 6C is an enlarged sectional view taken along line C of FIG. 6A;

7 is a cross-sectional view of the combined wood frame of the present invention acoustic reflection plate,

<Description of Symbols for Main Parts of Drawings>

110, 210: curved panel, 200: acoustic reflection plate,

111, 211: top plate, 112, 212: bottom plate,

113, 213: honeycomb, 111a, 112a: melamine cardboard,

111b, 111c, 112b, 112c: plywood, 211a: solid wood,

211b: MDF, 211c: plywood 220: bonded wood frame,

230: bending wood frame, 240: curved curved steel bar

The present invention relates to a curved panel for an acoustic reflection plate and a method of manufacturing the same. More particularly, the present invention relates to a panel for acoustic reflection panels that can be used semi-permanently because it is light, easy to handle, and does not extend or deform even when installed for a long time.

The sound reflection board is a facility that prevents the sound of sound produced by orchestration or orchestral music from being distributed to the upper part, the side part, and the rear part of the stage while reflecting sound so that the sound is sufficiently delivered to the audience. It is installed in the side part and the rear part, but when not in use, it is stored in the upper stage tower or side pocket.

In the panel structure of the conventional acoustic reflection board, the keel-shaped frame of the ship is made by using several squares having a curved angle of 1.5m radius or 3m radius, and then the curved panel is attached by attaching plywood or medium density fiberboard to the front and back. It is a structure made by forcing a panel board reinforced with plywood or MDF in front and behind and honeycomb in the middle into steel or aluminum frame with a certain bonding angle. Therefore, such a conventional acoustic reflector may bend over time due to the restoring force of the curved panel, and there may be a case in which light from behind the stage floats between the plate and the plate, and the weight is too heavy to suspend it on the ceiling. However, there is a problem that a lot of energy is consumed to drive.

Accordingly, in the Utility Model Utility Model No. 20-0232115, with reference to Figs. 1A and 1C, the left and right booths 13 and 14 in the form of an arc having a straight top and bottom frame 11 and 12 and a curved angle are shown. After attaching the outer plate 20 coated with a urethane bond to the outer frame 10 made of a honeycomb (30) and bonding the honeycomb (honey comb) 30, the inner plate 40 coated with the urethane bond is mounted again Disclosed is a method of manufacturing a curved panel by leaving an outer finish and leaving the adhesive until it hardens, and manufacturing a sound reflector using the curved panel thus made. However, the panel of the invention acoustic reflection panel is also merely forcibly bent the curved surface, and if time elapses, the curved surface may be distorted due to the restoring force of the panel itself or the plate may be displaced from the plate. Therefore, in order to maintain the curved surfaces of these acoustic reflection plates, it is necessary to additionally attach a pedestal (an aluminum bar having the same curved angle as the panel) or use a thicker and stronger aluminum frame. In this case, the weight becomes heavy, and in order to maintain the curved shape, the plate itself is made small and installed in several pieces, so that there are many connecting parts and the work process becomes complicated.

Accordingly, the present inventors have found a method for manufacturing a curved panel in which the curved surface of the acoustic reflective plate does not spread semi-permanently, thereby completing the present invention.

It is an object of the present invention to provide a curved panel for an acoustic reflection board without deformation.

Another object of the present invention is to provide a method of manufacturing a curved panel for acoustic reflection plate that can be used semi-permanently without distortion.

Yet another object of the present invention is to provide a curved panel for an acoustic reflection plate that is light in weight and large in size.

Yet another object of the present invention is to provide a curved panel which is easy to handle and simple to assemble, thereby making an acoustic reflection plate convenient.

The curved panel of the present invention acoustic panel is itself made of a curved surface does not cause deformation, and is related to the curved panel configured to be easy to assemble and install as an acoustic reflective plate, light and durable. The curved panel for acoustic reflection plates of the present invention is formed by bending in heat in a bent state at the time of manufacture, so that the panel itself forms a curved surface, and thus has no feature of being deformed even after long-term use.

According to the present invention, a method for manufacturing a curved panel of acoustic reflection plate is made of a laminate by bonding two or three pieces of plywood with an adhesive for wood (for example, polyvinyl acetate emulsion and an isocyanate urethane resin adhesive), and then a 1.5m radius or a 3.0m radius It is placed in a heat treatment wooden frame made in the curved shape of the heat treatment to fix the bending (bending). Usually, the heat treatment temperature varies depending on the curing time and the curing time. In the case of the vinyl acetate resin of the present invention, 70 ° C to 80 ° C is appropriate. At 70 degrees C or less, hardening time becomes too long, and at 80 degreeC or more, there exists a possibility that adhesive may become deteriorated. High frequency heat treatment is used as the heat treatment means. The curved plate thus prepared is made of an upper plate and a lower plate, and in the middle thereof, the honeycomb is bonded and placed, and then pressed by a hydraulic press from above and below to produce a curved panel integrated into a laminate.

The upper and lower and left and right ends of the curved panel is provided with an outer frame to complete the manufacture of the acoustic reflection plate. As the frame for the outer frame of the curved panel of the present invention, a frame made of aluminum, wood, and synthetic resin is used.

In the manufacture of the curved panel of the present invention, MDF may be used in addition to plywood, or a combination thereof may be used. For the beautiful appearance of the surface, a cardboard made of melamine resin (hereinafter referred to as "melamine cardboard") or a wooden pattern paper is laminated as a surface material. Plywood can also be used. In addition, according to the needs of the consumer can be made in a variety of sizes and appropriate thickness. If you have a thick melamine paperboard, you can also glue the plywood directly to make a laminate.

In the case of the wood frame type acoustic reflection plate, the bending wood frame is attached to the top and bottom of the curved panel, and the combined wood frame is attached to the left and right ends to form the outer frame to complete the manufacture of the acoustic reflection plate. The combination wood frame is characterized in that its cross section is a trapezoidal shape (FIG. 7), unlike the rectangular cross section (FIG. 1A) of the aluminum frame of the prior art. It can be tilted, eliminating the gap δ generated when combining the conventional rectangular aluminum frames (FIG. 1B) so that the surfaces can be brought into contact with each other when the two acoustic reflectors are combined. You will be able to achieve a tight bond. In the present invention, the wood frame type acoustic reflection plate requires a U-shaped curved steel bar provided with two U-shaped fastening grooves at both ends in order to connect to the cross steel pipe. The two curved steel bars are installed between the top and bottom plates together with honeycomb, but are installed side by side on the bending wood frame. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

Figure 2a is a rear perspective view of the curved panel of the first embodiment of the present invention, Figure 2b is a longitudinal sectional view of the curved panel of the first embodiment of the present invention, Figure 3a is a perspective view of the curved panel of the second embodiment of the present invention, Figure 3b is a present invention Second embodiment is a longitudinal (AA) cross-sectional view of the curved panel, Figure 4a is a partial cutaway perspective view of the back of the wood frame acoustic reflector made using the second embodiment curved panel of the present invention, Figure 4b is an enlarged portion D of Figure 4a 5 is a rear view of the assembled state of the wooden frame acoustic reflection board made using the curved panel of the present invention. Figure 6a is a plan view of the assembled state of the wood frame acoustic reflector of the present invention, Figure 6b is an enlarged cross-sectional view of the portion B of Figure 6a, Figure 6c is an enlarged cross-sectional view of the portion C of Figure 6a, Figure 7 is a cross-sectional view of the combined wood frame of the acoustic reflection plate of the present invention. .

<Example 1>

Preparation of curved plates for top and bottom plates:

Referring to FIGS. 2A and 2B, the curved panel 110 of the present invention has a structure in which the upper plate 111, the honeycomb 113, and the lower plate 112 are sequentially stacked, and the upper plate 111 and the lower plate 112 are sequentially stacked. ) Is in the form of a laminated plate formed by combining the melamine paper 111a and two sheets of plywood 111b and 111c.

The upper plate 111 and the lower plate 112 are manufactured by using a high-frequency heat treatment, first using a wood adhesive (48% by weight vinyl acetate emulsion) 0.8 mm melamine paper on the surface, then 2.3 mm plywood, again 1.8 mm plywood Are bonded in turn, put into a high-frequency heat treatment wooden frame made in a curved shape (15m radius) and subjected to high-frequency heat treatment at 80 ℃ to produce a curved surface plate is fixed to the surface.

Manufacturing of curved panels:

Next, the curved plate manufactured as described above is used as the upper plate 111 and the lower plate 112, and an adhesive is applied to the inner surface thereof. By pressing and integrating, the curved panel laminated with melamine cardboard 111a, plywood 111b, plywood 111c, honeycomb 113, plywood 111c, plywood 111b, melamine cardboard 111a 110). The curved panel 110 of the present invention manufactured through the above process is hardened in a curved shape and has a feature that the curved surface does not expand or distort even after elapse of time.

<Example 2>

Preparation of curved plates for top and bottom plates:

A curved plate was manufactured in the same manner as in Example 1, except that a wooden pattern paper instead of melamine paper and 2.3 mm MDF instead of 2.3 mm plywood were used in the curved plate manufacturing process of Example 1.

Manufacturing of curved panels:

Next, the curved plate is used as the upper plate 211 and the lower plate 212, and an adhesive is applied to the inner surface thereof, and a 40.5 mm honeycomb 213 is placed in the middle, and the curved angle of the panel together with the honeycomb 213 is applied. The two U-shaped curved steel bars 240 having the same coplanar angle and provided with two U-shaped fastening grooves at both ends are placed in the transverse direction (to be installed side by side with the bending wood frame to be later joined). Next, by pressing the upper and lower parts with a hydraulic press to integrate the solid wood pattern paper (211a), MDF (211b), plywood (211c), honeycomb (213) and A-shaped curved steel bar (240), plywood (211c), MDF A curved panel 210 in which 211b and wood pattern paper 211a are sequentially stacked is manufactured. The curved panel 210 of the present invention manufactured through the above process is hardened in a curved shape and has a feature that the curved surface does not spread or twist even after elapse of time.

<Test Example>

4a to 7, the bent wood frame 230 to the upper and lower ends of the curved panel 210 of the present invention, respectively, the left and right ends of the outer frame by attaching and bonding the combined wood frame 220 with an adhesive, respectively. The combined wood frame type acoustic reflection plate 200 is manufactured. The various frames and angled curved steel bars were 40 mm in height 0.5 mm smaller than honeycomb. This is because the honeycomb is pressed down to be slightly smaller than the honeycomb thickness of 40.5 mm to widen the adhesive surface so that the honeycomb can maintain a more firm adhesiveness.

The wood frame type acoustic reflection plate 200 of the present invention is coupled to the wood frame 220 by a screw using a reinforcement angle 231, so that the acoustic reflection plate 200 is coupled to the fastening groove of the A-shaped steel bar 240 It is fixed to the steel pipe 250 by a bolt 251 that couples the 241 and the crosspiece steel pipe 250, the steel pipe 250 is bolted to the longitudinal steel pipe 260 again to the ceiling acoustic reflector, It is used as a front acoustic reflector and a side acoustic reflector.

The acoustic panel is attached to the curved panel of Example 1 by attaching an aluminum or plastic frame.

The curved panel of the present invention inherently curved surface by fixing the bending by heat treatment from the time of manufacture, unlike the acoustic reflector plate (FIG. 1a) manufactured by inserting a thick plate made of a conventional flat plate into a metal frame forcibly bent. A curved panel can be manufactured, and the use of such curved panels can facilitate the assembling work of the acoustic reflection plate. The acoustic reflection plate of the present invention has the effect of suppressing the phenomenon of distortion or deformation even after long-term use.

Claims (8)

A first step of manufacturing a laminate by bonding a plywood or MDF into two or three layers with a vinyl acetate emulsion adhesive or an isocyanate urethane resin adhesive, which is a wood adhesive; A second step of manufacturing the upper plate and the lower plate by placing the laminated plate in a curved heat-treated wooden mold and fixing the curved surface by high frequency heat treatment; A method of manufacturing a curved panel for an acoustic reflection plate, comprising a third step of bonding the honeycomb between the upper plate and the lower plate to press the upper and lower portions to integrate the honeycomb. The method of manufacturing a curved panel for an acoustic reflection board according to claim 1, wherein the laminated board of the first step has a laminated surface of melamine paper or wood pattern paper. delete delete According to claim 1, wherein in the third step, the U-shaped fastening grooves are provided with two U-shaped fastening grooves at both ends with the honeycomb between the upper plate and the lower plate by pressing up and down by a hydraulic press to produce a laminate. A method of manufacturing a curved panel for an acoustic reflection plate characterized in that. In a panel for acoustic reflection boards in which honeycomb is placed between an upper plate and a lower plate, the upper plate and the lower plate of the panel are made of two or three layers of plywood or MDF, and a vinyl acetate emulsion adhesive or an isocyanate urethane resin adhesive, which is an adhesive for wood. It is a laminated board material manufactured by putting the laminated board bonded to the board into a curved wooden frame and heat-processing at high frequency to fix the curved surface.Hycomb is placed between the upper board and the lower board, and the upper and lower boards are pressed to integrate the curved panel laminated. Surface panel for acoustic reflector, characterized by a chain. The curved panel for an acoustic reflection board according to claim 6, wherein the top and bottom surfaces are made by laminating melamine paper or solid wood. The curved panel of claim 6 or 7, further comprising a U-shaped curved steel bar provided with two honeycomb U-shaped fastening grooves at both ends between the upper plate and the lower plate. .

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