Suspended anti-sound hood

Abstract

A suspended reverberation shield for stage use. The top plate, side plates and back plate of the reverberation shield are all hoisted on the stage top, lowered during use and hoisted when not in use. Due to the suspended installation, the reverberation board structure can be made simple and lightweight. Both the top plate and side plates of the reverberation shield adopt a folding structure and are suspended by steel cables in the upper part of the stage. The top plate and side plates are suspended by lifting steel cables and positioning steel cables. The positioning steel cables are used to determine the suspension positions of the top plate and side plates, and the lifting steel cables are used to fold the top plate and for storage. The lifting steel cables are fixed on the stage hanging rods, and the stage hanging rods are used to lift and lower the reverberation shield.

Description

Technical Field

[0001] The reverberation cover is also known as sound reflection cover, music cover, sound reflection board, music reverberation cover, acoustic reflection cover, anti-sound cover, etc. Its function is to create a better natural acoustic environment for performing live concerts in the opera house. The reverberation cover is a stage device set in the front area of the main stage. Background Art

[0002] The reverberation cover is composed of a top plate, side plates and a rear plate. It is usually made of aluminum plates or plastic plates. The top plate of the currently used reverberation cover is usually made into a foldable structure, which is retracted when not in use and opened and hung on the stage hanging rod when in use. There are two types of the rear plate and side plates, integral and foldable. Generally, the reverberation board is loaded on a trolley and placed behind or on the side of the stage when not in use, and pushed to the designated position when in use. Since the maximum height of the reverberation board is nearly 6 meters and it is made of thin and light materials, it is neither easy to store nor easy to be damaged by collision. Summary of the Invention

[0003] In the present invention, the top plate, side plates and back plate of the anti-sound cover are hoisted onto the stage top by stage hanging rods, and are lowered during use and hoisted when not in use. Due to the suspension installation, the strength design of the anti-sound plate only needs to consider the influence of gravity, so the structure can be made simple and light. There are usually many stage hanging rods controlled by winches installed on the stage top, and their purpose is to suspend stage props such as curtains and stage backgrounds. The present invention uses several of these stage hanging rods to fix the top plate, side plates and back plate on the corresponding stage hanging rods. During use, the winch is operated to lower the anti-sound cover, and when not in use, the anti-sound cover is lifted and stored suspended on the stage top. The present invention is realized as follows: The top plate adopts a folding structure, using two plates in the front and back, with a hinge in the middle, which can be folded. The top plate is relatively long and uses several identical sets of suspension systems. Each set of suspension systems of the top plate uses two lifting steel cables and one positioning steel cable; the positioning steel cable is used to determine the suspension height of the top plate, and the lifting steel cable is used to fold the top plate and suspend and store the top plate. The top plate consists of front and back plates, top plate hanging rods, a limit mechanism and suspension cables, etc. The top plate hanging rod is a rigid rod with a hinge hole below, which is hinged to the hinges of the two front and back top plates. Since lighting lamps need to be installed on the top plate, in order to have enough space inside the folded top plate to install the lighting lamps, the height of the hinge under the top plate hanging rod corresponds to the thickness of the lighting lamps. One end of the positioning steel cable is connected to the upper part of the top plate hanging rod, and the other end is connected to the wire reel. When the top plate is lowered, the limit position of the lowered positioning steel cable is exactly the working height of the top plate. Longitudinal beams are installed on the front and back plates of the top plate. One end of two folding steel cables is respectively connected to the longitudinal beams of the front and back plates, and the other ends are combined and connected to the lifting steel cable. The other end of the lifting steel cable is fixed on the stage hanging rod. When the stage hanging rod rises, the lifting steel cable rises, pulling the folding steel cables to fold the top plate, and then as the stage hanging rod rises, the folded top plate is lifted to the parking height. During the rising process, the positioning suspension cable is not stressed and is retracted by the wire reel. When the top plate is lowered, the stage hanging rod descends, the lifting steel cable lowers the top plate along with the stage hanging rod, and the positioning steel cable is pulled out from the wire reel as the top plate descends. When the top plate descends to the limit position of the positioning steel cable, the top plate is restricted by the positioning steel cable and stops descending. The lifting steel cable continues to descend, and under the action of gravity, the front and back plates gradually open. When the front and back plates open to the predetermined position of the limit mechanism, the opening angle of the front and back plates no longer increases.

[0004] When installing the sound-reflecting board, the side plates on both sides are close to the two ends of the top plate and are perpendicular to each other. To facilitate hoisting the side plates onto the grid ceiling, the side plates are made into two foldable single side plates. Folding cables and positioning cables are installed at the top of the side plates, and universal wheels are installed at the bottom. One end of the positioning cable is connected to the cable winder, and the other end is fixed to the hinge shaft of the side plate hinge. The function of the positioning cable is to determine the landing position of the side plate and keep the side plate in an upright posture. Inner and outer lifting lugs are installed at the top of the side plate. The two ends of the outer folding cable are respectively connected to the outer lifting lugs of the two single side plates, and the middle of the outer folding cable is connected to the outer lifting cable. The two ends of the inner folding cable are respectively connected to the inner lifting lugs of the two single side plates, and the middle of the inner folding cable is connected to the inner lifting cable. The other ends of the inner and outer lifting cables are fixed to the stage hanging bars. When hoisting the side plates, as the stage hanging bars rise, the lifting cables lift the folding cables. Under the action of the horizontal component force, the folding cables fold the side plates. When the side plates are folded, the lifting cables continue to rise to lift the side plates off the ground. The positioning cables lose the gravity load of the side plates and are retracted by the cable winder. The lifting cables lift the side plates to the storage position. During the lowering process of the side plates, as the stage hanging bars descend, the positioning cables are continuously pulled out from the cable winder. When the side plates descend to the limit position of the positioning cables, the side plates just touch the ground. Since the positioning cables are elastic, part of the load of the side plates is borne by the positioning cables, and part is borne by the universal wheels at the bottom of the side plates. The stage hanging bars continue to descend, and the lifting cables are completely relaxed. At this time, the folded side plates can be manually opened and placed in the set position. Since the positioning cables on the upper part of the side plates apply a vertically upward pulling force to the side plates, the side plates can maintain an upright posture.

[0005] The back plate is directly fixed to the stage hanging bars and is controlled to lift and lower through the stage hanging bars.

[0006] Since the positioning cables no longer bear the gravity of the top plate and the side plates after the top plate and the side plates are hoisted, to avoid entanglement of the hanging positioning cables, the tops of all the positioning cables of the top plate and the side plates are connected to their respective cable winders. The cable winders retract the hanging cables to keep the cables always in a vertical state. The cable winders use scroll springs to drive the cable reels to retract the positioning cables. The cable winders are fixed on the grid ceiling. There is an opening on the cable winder bracket, and the positioning cables pass through the opening. A positioning stop is sleeved on the positioning cable. When the positioning stop touches the opening, the cable no longer descends, thus determining the working length of the positioning cable. Description of the Drawings

[0007] Figure 1 It is a schematic structural diagram of the opened state after the side plate lands.

[0008] Figure 2 It is a schematic structural diagram of the folded state of the side plate.

[0009] Figure 3 It is a schematic structural diagram of the opened state of the top plate.

[0010] Figure 4 It is a schematic structural diagram of the top plate in the folded state.

[0011] Figure 5 It is a schematic diagram of the storage state of the top plate and side plates.

[0012] Figure 6 It is a schematic diagram of the working state after the top plate and side plates are lowered.

[0013] Figure 7 It is a schematic structural diagram of the wire reel.

[0014] Figure 1 In the figure: 1. Caster, 2. Single side plate, 3. Hinge, 4. Distal lifting lug, 5. Hinge shaft, 6. Outer folding cable, 7. Positioning cable, 8. Inner folding cable, 9. Inner lifting lug, 10. Outer sling, 11. Inner sling.

[0015] Figure 2 In the figure: 1. Caster, 2. Single side plate, 3. Hinge, 4. Distal lifting lug, 5. Hinge shaft, 6. Outer folding cable, 7. Positioning cable, 8. Inner folding cable, 9. Inner lifting lug, 10. Outer sling, 11. Inner sling.

[0016] Figure 3 In the figure: 301. Top plate longitudinal beam, 302. Front limit cable, 303. Top plate suspension rod, 304. Top plate positioning cable, 305. Top plate lifting cable, 306. Rear folding cable, 307. Lighting lamp, 308. Rear top plate, 309. Rear limit cable, 310. Rear plate hinge, 311. Front plate hinge, 312. Limit ring, 313. Front top plate, 314. Front folding cable.

[0017] Figure 4 In the figure: 301. Top plate longitudinal beam, 302. Front limit cable, 303. Top plate suspension rod, 304. Top plate positioning cable, 305. Top plate lifting cable, 306. Rear folding cable, 307. Lighting lamp, 308. Rear top plate, 309. Rear limit cable, 310. Rear plate hinge, 311. Front plate hinge, 312. Limit ring, 313. Front top plate, 314. Front folding cable.

[0018] Figure 5 In the figure: 6. Outer folding cable, 7. Positioning cable, 8. Inner folding cable, 100. Side plate, 300. Top plate, 304. Top plate positioning cable, 305. Top plate lifting cable, 400. Stage suspension rod.

[0019] Figure 6 In the figure: 6. Outer folding cable, 7. Positioning cable, 8. Inner folding cable, 100. Side plate, 300. Top plate, 304. Top plate positioning cable, 305. Top plate lifting cable, 400. Stage suspension rod.

[0020] Figure 7 Among them: 201, adjusting bolt; 202, sling positioning block; 203, sling; 204, wire take-up wheel; 205, volute spring; 206, shaft; 207, bracket. Specific implementation manner

[0021] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings:

[0022] Figure 1 It shows a schematic structural diagram of the side plate in the opened state after landing. In order to clearly show the relative positional relationship of several steel cables, there is also a top view below. The display state of the steel cables in the front view and the top view is different from the actual state. Two single side plates (2) are connected together through hinges (3) and hinge shafts (5). Casters (1) are installed below the single side plates (2), inner lifting lugs (9) are installed near the hinge shaft (5) at the top, and outer lifting lugs (4) are installed far from the hinge shaft (5). One ends of two outer folding steel cables (6) are respectively connected to the outer lifting lugs (4), and the other ends are combined and connected to the outer sling (10). One ends of two inner folding steel cables (8) are respectively connected to the inner lifting lugs (9), and the other ends are combined and connected to the inner sling (11). The upper end of the hinge shaft (5) is connected to the positioning steel cable (7). When the positioning steel cable (7) reaches the limit position, the side plate lands, and the casters (1) support the weight of the side plate. The positioning steel cable (7) positions the side plate on the stage floor and keeps the side plate in an upright posture. The figure shows the instantaneous state when the side plate is lifted from the ground. When the inner sling (11) and the outer sling (10) rise, the gravity of the side plate gradually falls on the inner folding steel cable (8) and the outer folding steel cable (6), causing the inner folding steel cable (8) and the outer folding steel cable (6) to generate an inward component force, causing the two single side plates (2) to fold inward. When the side plate is folded, the inner sling (11) and the outer sling (10) drive the side plate to rise until the storage position.

[0023] Figure 2 It shows a schematic structural diagram of the folded state of the side plate. The inner folding steel cable (8) and the outer folding steel cable (6) fold the two single side plates (2) under the action of the folding component force, and the inner sling (11) and the outer sling (10) lift the side plate. At this time, the entire gravity of the side plate falls on the inner sling (11) and the outer sling (10), and the positioning steel cable (7) does not bear the gravity of the side plate and is only subject to the wire take-up force of the wire take-up device.

[0024] Figure 3The figure shows a schematic structural diagram of the top plate in the open state. The top plate consists of a front top plate (313), a rear top plate (308), a front folding cable (314), a rear folding cable (306), a top plate lifting cable (305), and a top plate suspension rod (303), etc. There is a hinge hole at the lower end of the top plate suspension rod (303) which is hinged to the front plate hinge (311) and the rear plate hinge (310). Through these two hinges, the front top plate (313) and the rear top plate (308) are combined together. Both the front top plate (313) and the rear top plate (308) are equipped with top plate longitudinal beams (301). One end of the front folding cable (314) and the rear folding cable (306) is connected to the top plate longitudinal beam (301) of the front top plate (313) and the rear top plate (308), and the other ends are merged together and connected to the top plate lifting cable (305). The figure shows the state at the moment when the top plate is in place or at the moment when the top plate starts to rise. During the rising process of the top plate, starting from this state, as the top plate lifting cable (305) continues to rise, the front top plate (313) and the rear top plate (308) begin to fold under the action of the inward component forces of the front folding cable (314) and the rear folding cable (306). After folding, the top plate starts to be lifted. During the descending process of the top plate, the top plate positioning cable (304) follows the top plate suspension rod (303) and descends to the limit position. The top plate positioning cable (304) holds the top plate suspension rod (303) and stops it from descending further. The top plate lifting cable (305) continues to descend, the front folding cable (314) and the rear folding cable (306) relax, and under the action of gravity, the top plate begins to open. The stop position of the top plate opening is determined by the limit mechanism. The limit mechanism consists of a limit ring (312), a front limit cable (302), and a rear limit cable (309). The limit ring (312) is sleeved on the top plate suspension rod (303) and can move along the top plate suspension rod (303). There are set screws on the limit ring (312) which can fix the limit ring (312) at any position on the top plate suspension rod (303). One end of the front limit cable (302) and the rear limit cable (309) is sleeved on the top plate suspension rod (303) and is clamped by the limit ring (312), and the other ends are hinged to the longitudinal beams (301) of the front top plate (313) and the rear top plate (308). When the top plate opens, the front limit cable (314) and the rear limit cable (309) together with the limit ring (312) limit the opening angle of the top plate. When the top plate folds, the front limit cable (302) and the rear limit cable (309) relax and do not hinder the folding of the top plate. The function of the top plate positioning cable (304) is to determine the working height of the top plate. One end of it is connected to the top plate suspension rod (303), and the other end is fixed to the grid top through a wire reel. After the top plate descends to the working height position, the top plate positioning cable (304) reaches the limit position and starts to bear the gravity of the top plate. After the top plate leaves the working position, the top plate positioning cable (304) unloads, and the top plate gravity is borne by the top plate lifting cable (305).The front top plate (313) and the rear top plate (308) are also equipped with lighting lamps (307), and the number of lighting lamps (307) is determined according to the size of the stage.

[0025] Figure 4 The figure shows a schematic structural diagram of the top plate in the folded state. When the top plate is folded,

[0026] When lifted to the storage position, the top plate lifting steel cable (305) bears the gravity of the top plate. The lighting lamps (307) installed on the front top plate (313) and the rear top plate (308) are arranged staggeredly, so that the lighting lamps (307) make full use of the internal space of the top plate and minimize the thickness of the top plate after folding. The folding thickness of the top plate depends on the heights of the rear plate hinge (310) and the front plate hinge (311).

[0027] Figure 5 The figure shows a schematic diagram of the storage state of the top plate and the side plates. The outer folding steel cable (6), the inner folding steel cable (8) on the side plates (100) and the top plate lifting steel cable (305) on the top plate (300) are fixed to the stage hanging rod (400). The top plate (300) and the side plates (100) rise and fall with the stage hanging rod (400). The positioning steel cable (7) and the top plate positioning steel cable (304) are connected upward to the wire reel.

[0028] Figure 6 The figure shows a schematic diagram of the working state after the top plate and the side plates are lowered. After the side plates (100) land, the outer folding steel cable (6) and the inner folding steel cable (8) are completely relaxed, and the side plates can be opened. The casters (1) contact the stage and support the weight of the side plates (100). The positioning steel cable (7) determines the landing position of the side plates (100) and keeps the side plates (100) in an upright posture. After the top plate (400) reaches the working position, the top plate positioning steel cable (304) bears the weight of the top plate (400). As the front folding steel cable (314) and the rear folding steel cable (306) are continuously relaxed, the front top plate (313) and the rear top plate (308) of the top plate (400) are gradually opened, and the front folding steel cable (314) and the rear folding steel cable (306) are completely relaxed after being opened in place.

[0029] Figure 7The figure shows a schematic diagram of the wire reel structure. The function of the wire reel is to position its working position using the sling (203) when the top plate or side plate is lowered, and to retract the sling (203) when the top plate or side plate is raised. The bracket (207) is installed with 3 adjusting bolts (201), which can adjust the horizontal position of the bracket and also finely adjust the positioning height of the sling (203). The wire reel (204) is installed on the bracket (207). The scroll spring (205) is coaxial with the wire reel (204) and is installed on the shaft (206) together. One end of the scroll spring (205) is fixed on the shaft (206), and the other end is fixed on the wire reel (204). The shaft (206) is fixed on the bracket (207) to make it non-rotating, and the wire reel (204) is installed on the shaft (206) through bearings. When the top plate or side plate is lifted, the sling (203) is relaxed, and the scroll spring (205) drives the wire reel (204) to retract the sling (203). When the top plate or side plate is lowered, its gravity is greater than the elastic force of the scroll spring (205), pulling the sling (203) out of the wire reel (204) and simultaneously tightening the scroll spring (205). There is a hole on the bracket (207), and the hole is directly opposite the vertical tangent position of the wire reel (204). The sling positioning block (202) is sleeved on the sling (203) and fixed at the set position of the sling (203) with a set screw. When the top plate or side plate is lowered, the sling (203) is lowered along with it. When the top plate or side plate reaches the predetermined position, the sling positioning block (202) is stuck in the position of the bracket hole, and the sling (203) no longer descends, causing the top plate or side plate to stop at a determined position.

Claims

1. A suspended anti-sound cover, which is composed of a back plate, a foldable top plate, foldable side plates and suspension steel cables, and is characterized in that: The lifting cables for the top plate, side plates, and back plate are respectively fixed to the corresponding stage hanging rods; the top plate adopts a folding structure and is divided into two front and back plates. Lighting lamps are installed on the plates. The two plates are hinged to the lower part of a rigid top plate hanging rod through hinges. The lifting cable is connected to the longitudinal beam of the top plate, serving the functions of folding the top plate and suspending storage; there is a limit mechanism on the top plate hanging rod for controlling the opening angle of the top plate; the side plates are made in a folding form. Lifting lugs and positioning cables are installed at the top of the side plates, and universal wheels are installed at the lower part. The folding cable is connected to the lifting lug of the side plate. A sling is connected in the middle of the folding cable. The function of the sling is to fold the side plate and lift the side plate; the positioning cables of the top plate and side plates are fixed to the stage grid ceiling through wire reelers. The positioning cables serve the functions of positioning the working height of the top plate and determining the landing position of the side plates; after the top plate and side plates are lifted, to prevent the positioning cables of the top plate and side plates from getting entangled, the positioning cables are respectively connected to their own wire reelers, and the wire reelers are fixed to the grid ceiling.

2. The suspended anti-sound cover according to claim 1, characterized in that: The top plate consists of two front and back plates with hinges. There is a rigid top plate hanging rod in the middle. There is a hinge hole under the top plate hanging rod. The hinges of the front and back plates are hinged to the lower part of the top plate hanging rod; longitudinal beams are installed on the front and back top plates. One end of the folding cables of the front and back top plates is respectively connected to the front and back longitudinal beams of the top plate, and the other ends are merged and connected to the lifting cable of the top plate; the top of the top plate hanging rod is connected to the positioning cable of the top plate.

3. The suspended anti-sound cover according to claim 1, characterized in that: The top plate hanging rod is a rigid rod. The upper end of the top plate hanging rod is connected to the positioning cable, and there is a hinge hole at the lower end, which is hinged to the hinges of the front and back plates; a positioning ring and a limit cable are sleeved on the hanging rod.

4. The suspended anti-sound cover according to claim 1, characterized in that: The limit mechanism on the top plate hanging rod consists of two limit cables and a limit ring; the limit ring is sleeved on the top plate hanging rod. There are set screws on the limit ring, which can be fixed at any position on the top plate hanging rod; one end of the two limit cables is hinged to the longitudinal beams of the front and back plates, and the other end is sleeved on the top plate hanging rod and is stuck by the limit ring to limit the position.

5. The suspended anti-sound cover according to claim 1, characterized in that: The side plate is divided into two single plates and is connected into a whole through a hinge; the top of the hinge shaft is connected to the positioning cable. The limit position of the falling positioning cable is such that the side plate lands at a determined position on the stage and at the same time keeps the side plate in an upright posture; two lifting lugs are installed at the top of each single plate of the side plate. One end of the two inner folding cables is connected to the inner lifting lugs of the two single plates close to the hinge, and the other ends are joined together to form an inner sling; one end of the two outer folding cables is connected to the outer lifting lugs of the two single plates farther from the hinge, and the other ends are joined together to form an outer sling; these two lifting cables are both fixed to the stage hanging rod; two casters are also installed under each single plate. The casters can bear part of the weight of the side plate and also facilitate the opening of the side plate after it lands.

6. The suspended anti-sound cover according to claim 1, characterized in that: The wire winder consists of a bracket, a wire winding wheel, a positioning block and a volute spring. The wire winder is installed on the stage grid top. The positioning cable is wound around the wire winding wheel, and the wire winding wheel is installed on a shaft through a bearing. The volute spring is coaxial with the wire winding wheel, with one end fixed on the wire winding wheel and the other end fixed on the shaft. The shaft is fixed on the bracket and cannot rotate. There is an opening on the bracket, and the opening faces the vertical tangent of the wire winding wheel. The positioning cable extending from the wire reel droops through the opening below the grid top and is connected to the top plate or the side plate. A sling positioning block is sleeved on the positioning cable. There is a set screw on the sling positioning block, and the positioning block is fixed at a predetermined position on the positioning cable with the set screw. When the positioning cable descends and the sling positioning block gets stuck in the opening, the positioning cable will no longer descend and stops at this position.

7. The suspended anti-sound cover according to claim 1, characterized in that: The slings of the top plate, the side plates and the back plate are fixed on the stage hanging bars and are lifted and lowered by the stage hanging bars.

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