Automatic retractable full-suspension sound reflection baffle

Abstract

The present application relates to an automatic retractable full-suspension sound reflection baffle, consisting of a truss, a top plate, a side plate, a top plate folding sling traction mechanism, a side plate transverse movement mechanism, and a side plate opening mechanism, and characterized in that: both the top plate and the side plate are hoisted on the truss; a plurality of top plate folding steel cables are arranged on the top plate; a traction plate is arranged on the top plate folding sling traction mechanism, the plurality of top plate folding steel cables are connected together by means of the traction plate, the traction plate is driven by one winch to move, and the top plate is folded to be gathered by means of the top plate folding steel cables; the side plate transverse movement mechanism transversely moves the side plate by using a slide rail, the slide rail is fixed to the truss, the side plate is hoisted on hangers capable of moving along the slide rail, a side plate folding steel cable is pulled while the hangers move, and the side plate folding steel cable opens the side plate by means of push rod mechanisms; when the side plate is hoisted on a stage batten, the side plate opening mechanism uses a tension spring, the tension spring is released by means of descending of the batten, and the tension spring retracts to open the side plate; and slings on the outer side fold the side plate when the side plate is hoisted.

Description

Fully suspended automatically retractable soundproof cover Technical Field

[0001] Acoustic enclosures, also known as sound reflection enclosures, music enclosures, sound reflection panels, music sound reflection enclosures, acoustic reflection enclosures, and sound reflection enclosures, are designed to create a good natural acoustic environment for live concerts in opera houses. Acoustic enclosures are a stage fixture installed in front of the main stage. Background Art

[0002] The acoustic shield consists of a top plate, side plates and a back plate. It is usually made of aluminum plates or plastic plates. The top plate of the acoustic shield currently in use is usually made into a foldable structure, which is folded when not in use and opened and hung on the stage boom when in use. There are two types of back plates and side plates: integral and folding. Generally, the acoustic shield is loaded on a trolley, placed behind or on the side of the stage when not in use, and pushed to the designated position when in use. The inventor knows of a suspended acoustic shield in which the top plate is suspended using fixed steel cables and folding steel cables. One end of the fixed steel cable is fixed to the top of the grille, and the other end is fixed to the hinge of the top plate. One end of the folding steel cable is fixed to the boom, and the other end is fixed to the top plate. When the acoustic shield is in use, the boom is used to lower the top plate and the side plates. When the boom is lowered to the designed position, the fixed cables pull the hinges, and gravity is used to open the top plate. The suspended acoustic enclosure's fixed slings have one end fixed to the grille and the other connected to the top panel hinge. As the boom rises, a wire retractor must be used to prevent the wire rope from becoming entangled with other equipment, complicating the setup. Furthermore, the side panels must be manually opened after they drop, adding to the inconvenience.

[0003] Application Contents

[0004] To address the aforementioned issues, the present application provides a fully suspended, automatically retractable acoustic enclosure. The enclosure's top panel components are mounted on a single truss. When the enclosure is not in use, the truss is raised, allowing the enclosure to hang above the stage. When the enclosure is in use, the truss is lowered, and the top and side panels are opened using an electric mechanism. The top panel opening mechanism is powered by an electric winch, while the side panel opening mechanism is powered by electric push rods.

[0005] The roof opening mechanism works as follows: a boom with a positioning cable is fixed to the truss. The length of the positioning cable controls the roof opening angle. A folding cable is used to open and release the roof. One end of the folding cable is fixed to the outside of the roof. When the cable is pulled upward, the roof folds up. The other end of the folding cable is passed over a pulley and fixed to a movable hook. A winch pulls the hook laterally, which in turn shifts the pulley and moves the folding cable upward, folding the roof. To open the roof, the winch reverses to release the folding cable, allowing gravity to open the roof. The use of an electric mechanism eliminates the need for a cable take-up, simplifying the entire system. When the acoustic shield is in use, the side panels must be close to the roof. Because the acoustic shield is a trumpet-shaped structure with a smaller inner panel and a larger outer panel, the roof panel is also smaller on the inside and larger on the outside. Therefore, the outer ends of the roof panel are angled. To prevent the angled roof panel from colliding with the side panels when the shield is retracted, the side panels are moved outward a distance before the roof is retracted. Therefore, the side panels are mounted on a slide mechanism that is fixed to the truss. When using an acoustic enclosure, after the top panel is opened, a motorized push rod drives a pulley, which drives the side panels open and rests against the top panel. The side panels are opened using an opening mechanism.

[0006] The opening mechanism works as follows: The side panel opening mechanism is designed similarly to an umbrella opening mechanism. One end of a side panel folding cable is fixed to the side panel opening mechanism's push rod hinge, while the other end is routed around a pulley and then fixed to the truss beam. When the electric push rod pushes the trolley, the beam remains stationary, but the pulley moves with it, pulling the side panel folding cable upward, pulling the push rod hinge to open the side panels. An air spring is installed in the side panel opening mechanism. When the trolley returns to its original position, the side panel folding cable is released, and the air spring pushes the side panel opening mechanism to fold and close the side panels. This mechanism automatically opens and closes the entire acoustic enclosure, making it more convenient to use. If the side panels are hoisted using a stage boom, the side panel opening mechanism can also use a reverse-pull air spring instead of a push rod. This reverse-pull air spring acts like a tension spring: one end is fixed to the side panel hinge axis, and the other end connects the boom cable and the side panel folding cable of the side panel opening mechanism. When the stage boom rises, the boom cables stretch the counter-tension air springs, which extend and release the side panel folding cables. The side panels fold and close under the pull of the cables on the outer sides of the side panels. When the stage boom descends, the boom cables release the counter-tension air springs, which pull the side panel folding cables, opening the side panels. When the boom travel is much longer than the push rod cable travel, the boom cables are not directly connected to the counter-tension air springs but are connected to them via a movable pulley. This allows the boom travel to match the travel of the side panel folding cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0008] Figure 1 is a schematic diagram of the structure of the top plate and side plates installed on the truss;

[0009] Figure 2 is a schematic structural diagram of the top plate folding sling traction mechanism;

[0010] Figure 3 is a schematic structural diagram of the side panel opening mechanism;

[0011] Figure 4 is a schematic diagram of the working state of the side panel opening mechanism when the side panels are folded;

[0012] Figure 5 is a schematic diagram of the working state of the side panel opening mechanism when the side panel is opened;

[0013] Figure 6 is a schematic diagram of the structure of the hinge and push rod of the side panel opening mechanism;

[0014] Figure 7 is a schematic structural diagram of the side plate transverse movement mechanism;

[0015] Figure 8 is a schematic structural diagram of the side plate transverse movement mechanism;

[0016] Figure 9 is a schematic structural diagram of the side panel opening mechanism when the side panel is hoisted on the boom;

[0017] Among them, 1. top plate; 2. positioning sling; 3. positioning sling; 4. folding sling; 5. truss; 6. folding sling traction mechanism; 7. side plate sling; 8. side plate folding steel cable; 9. side plate transverse movement mechanism; 10. top plate folding winch; 11. electric push rod; 12. side plate balancing sling; 13. side plate hinge shaft; 14. side plate; 15. push rod hinge; 16. front push rod; 17. rear push rod; 18. column; 19. air spring; 20. buffer spring; 21. side plate pulley; 22. front spring; 501. hinge frame; 502. push rod traction plate; 503. pull ring; 50 4. Locating pin; 505. Hinge shaft; 601. Folding pulley; 602. Slide rail; 603. Hook; 604. Traction plate; 701. Side panel slide rail; 702. Side panel pulley; 703. Folding cable pulley; 704. Push rod fixed shaft; 705. Pulley hanger; 706. Folding cable fixed beam; 901. Reverse tension air spring; 902. Movable pulley sling; 903. Push rod; 904. Positioning holder; 905. Wire rope positioning chuck; 906. Movable pulley; 907. Side panel folding cable chuck; 908. Side panel outer sling; 909. Boom sling; 910. Caster. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0019] Figure 1 shows a schematic diagram of the structure of the top plate and side plates installed on the truss. The top plate and side plates are both hoisted on the truss. Since the top plate is very long, multiple sets of identical slings and folding cables are used to balance and reduce the load on the steel cables. The two top plates (1) are hinged to the positioning sling (3) through the hinge below the positioning sling (3). Two positioning slings (2) are fixed to the positioning sling (3). The length of the positioning slings (2) determines the angle at which the top plate (1) opens. The upper end of the positioning sling (3) is fixed to the truss (5). A folding sling traction mechanism (6) is installed on the truss (5). A traction plate (604) that can move laterally along a slide rail (602) is installed on the folding sling traction mechanism (6). The traction plate (604) is equipped with multiple hooks (603). The ends of the folding slings (4) are fixed on the hooks (603). Under the traction of the top plate folding winch (10), the hooks (603) are pulled by the traction plate (604). The hooks (603) drive the ends of the folding slings (4) to move laterally. The other ends of the folding slings (4) that pass around the folding pulley (601) move upward, driving the top plate (1) to rise and fold. The side panels (14) are hoisted on the pulley hanger (705) of the side panel transverse movement mechanism (9) through two side panel slings (7) and two side panel balancing slings (12). The other end of the balancing sling (12) is hinged to the lower end of the side panel (14) and is coaxial with the fixing point of the side panel sling (7) on the side panel (14). The function of the side panel balancing sling (12) is to keep the side panel (14) vertical after the top panel (14) is folded. The working process of the top panel and the side panel is as follows: when the anti-sound shield is not in use, the top panel and the side panel are folded and gathered and hung above the stage. When the anti-sound shield is used, the truss (5) is lowered. When the truss (5) is lowered to a predetermined height, the top panel folding winch (10) is started to work, the folding sling (4) is released, and the top panel (1) is opened under the action of gravity. When the top panel (1) is opened to the position limited by the length of the positioning sling (2), the top panel folding winch (10) is stopped. The electric push rod (11) is started to work. The electric push rod (11) pushes the pulley hanger (705) to move closer to the top plate through the push rod fixed shaft (704). When the pulley hanger (705) moves, the side panel folding steel cable (8) is pulled. The side panel folding steel cable (8) will drive the side panel opening mechanism to open the side panel (4). When the anti-sound shield is retracted, the electric push rod (11) is first started to retreat, driving the pulley hanger (705) to retreat, releasing the side panel folding steel cable (8), and folding the side panel (14). Then, the top panel folding winch (10) is started, the folding sling (4) is pulled, the top panel (1) is folded, and the truss (5) is lifted to retract the anti-sound shield to the top of the stage.

[0020] FIG2 shows a schematic diagram of the structure of the top plate folding sling traction mechanism. The top plate folding sling traction mechanism (6) consists of a folding pulley (601), a slide rail (602), a hook (603), a traction plate (604) and a top plate folding winch (10). The folding pulley (601) and the slide rail (602) are fixed to the truss (5), and the hook (603) is installed at the end of the pulley in the slide rail (602). The multiple hooks (603) are connected to form a whole through the traction plate (604). When one end of the traction plate (604) is pulled, all the connected hooks (603) can be driven. One end of the folding sling (4) is fixed to the hook (603), and the other end passes through the folding pulley (601) and is divided into two strands and then fixed to both sides of the top plate (1). Pulling the folding sling (4) upward will fold the top plate (1). When the top plate (1) is opened, the top plate folding hoist (10) is started, the folding sling (4) is released, and the top plate is opened under the gravity of the top plate (1). The hook (603) is essentially a connecting joint. The end of the folding sling (4) can be tied into a wire rope loop and put on the end of the pulley. Alternatively, a joint can be used as the hook (603) at the end of the folding sling (4) to be fixed to the end of the pulley. The function of the traction plate (604) is to connect all the folding slings (4) together and then be connected to the top plate folding hoist (10). The traction plate (604) can be made of a flat steel, and holes are punched at intervals according to the folding sling (4). The pulley on which the hook (603) is installed can be fixed to the traction plate. Alternatively, a wire rope can be used to fix the folding sling (4) on this wire rope. The slide rail (602) is essentially a track, and its purpose is to enable the hook (603) to move horizontally smoothly. The slide rail can also be of various types, such as C-type track, cylindrical track, linear slide rail or other types of track. The function of the winch is to provide power, so the power device is not limited to the winch, and can use an electric push rod, a gear rack mechanism, a hydraulic cylinder, etc.

[0021] FIG3 shows a schematic diagram of the structure of the side panel opening mechanism. The side panel opening mechanism consists of a push rod hinge (15), a front push rod (16), a rear push rod (17), a support (18), an air spring (19), a buffer spring (20), a side panel pulley (21), a front spring (22) and a side panel folding cable (8). One end of the front push rod (16) is fixed to the push rod hinge (15), and the other end is hinged to the rear push rod (17). The other end of the rear push rod (17) is hinged and fixed to the side panel (14). The column (18) is installed between the upper and lower rear push rods (17). One end of the air spring (19) is fixed to the column (18) and the other end is fixed to the side panel (14). When the side panel is opened, the air spring (19) is compressed. When the side panel folding cable (8) is released, the air spring (19) rebounds, folding the side panel. A front spring (22) is also installed between the symmetrical front push rods (16). The function of the front spring (22) is to pull the front push rod (16) to fold. The side panel pulley (21) is fixed to the side panel hinge shaft (13). The side panel folding cable (8) is reversed by the side panel pulley (21), converting the vertical pulling force into a horizontal pulling force on the push rod hinge (15). The buffer spring (20) connected to the side panel folding cable (8) is used to reduce the impact when the side panel folding cable (8) is subjected to force. The buffer spring (20) is not necessary. The working process of the side panel opening mechanism is as follows: after the buffer spring (20) is pulled, it drives the side panel folding cable (8), which turns through the side panel pulley (21) and pulls the push rod hinge (15). The push rod hinge (15) applies this force to the side panel (14) through the front push rod (16) and the rear push rod (17). The force acting on the side panel (14) can be decomposed into a tangential force and a normal force. The normal force opens the side panel (14) with the side panel hinge shaft (13) as the rotation axis. The force that pushes the side panel open is the normal force applied by the push rod on the side panel (14). When the pressure angle formed by the push rod and the side panel (14) is relatively small, the normal force will also be very small. In order to obtain a relatively large normal force, the push rod is divided into two push rods, front and rear. When the side panels are closed, the rear push rod (17) presses on the side panels (14), and the pressure on the front push rod (16) acts directly on the side panels (14) through the hinge with the rear push rod (17). Since the pressure angle of the front push rod (16) is relatively large, the normal force is also relatively large, which makes it easier to push the side panels (14) open. When the side panels (14) are opened to a certain angle, the front push rod (16) cannot continue to open due to the limitation of the positioning pin (504). The rear push rod (17) relays the force of the push rod hinge (15) to the side panels (14). It is not necessary to divide the push rod into two sections, front and back. When the width of the side panels (14) is relatively small, a straight rod can be used. In the case of using a straight push rod (903), only the front spring (22) or only the air spring (19) can also be used.The push rod mechanism uses two sets of push rod mechanisms installed in parallel, and the side panel folding steel cable (8) is installed in the middle of the push rod hinge (15). This is to ensure the balance and stability of the push rod mechanism. If a straight push rod (903) is used, the two push rods (903) can use a hinge frame (501). One end of the upper and lower push rods (903) is fixed on the side panel (14), and the other end is fixed on the hinge frame (501). There is a certain distance between the two push rods (903) fixed on the side panel (14), forming a triangle with the hinge frame (501) as the vertex. Such a structure has better stability than two sets of push rods installed in parallel.

[0022] FIG4 is a schematic diagram showing the working state of the side panel opening mechanism when the side panels are folded. The figure shows the assembly relationship between the various parts. At this time, the air spring (19) is in the maximum length state. As can be seen in FIG4, after the side panels (14) are folded and retracted, the pressure angle between the front push rod (16) and the side panels (14) is relatively large. When the push rod hinge (15) is pulled by the folding steel cable (18), a relatively large normal force is applied to the side panels (14). If the front push rod (16) and the rear push rod (17) are made into one piece, the pressure angle between the push rod and the side panels (14) is relatively small, which can easily cause self-locking. When the width of the side panels is relatively small, the pressure angle of the push rod will be relatively large, and the push rod can also be made into one piece. One end of the air spring (19) is hingedly fixed to the side panels (14), and the other end is hingedly fixed to the column (18). The front spring (22) is fixed between the two symmetrical push rods (16).

[0023] FIG5 shows a schematic diagram of the working state of the side panel opening mechanism when the side panel is opened. At this time, the air spring (19) is in a compressed state with a minimum length, and the front spring (22) is in a stretched state. As can be seen from the figure, if the push rod hinge (15) continues to move, the angle between the two front push rods (16) will become larger and larger. When the angle between the two front push rods (16) exceeds 180 degrees, the side panel will not continue to open, but will fold and close. To prevent this state from occurring, a positioning pin (504) is installed on the push rod hinge (15) to play a limiting role. When the front push rod (16) is opened to the position of the positioning pin (504), the opening angle no longer increases, ensuring the correct operation of the push rod. The opening angle of the front push rod (16) can also be limited without using the positioning pin (504). A limiting rope can be added in the middle of the front spring (22) to limit the stretching length of the front spring (22), which can also play a role in limiting the opening angle of the front push rod (16).

[0024] FIG6 shows a schematic diagram of the hinge and push rod mechanism of the side panel opening mechanism. A pull ring (503) is fixed to the middle position of the push rod traction plate (502), and a side panel folding steel cable (8) is connected to the pull ring (502). The side panel folding steel cable (8) pulls the push rod through the pull ring (503) and the push rod traction plate (502). A hinge frame (501) and two push rod sets are respectively installed at the upper and lower ends of the push rod traction plate (502). The two push rod sets are symmetrical and identical in the upper and lower parts. The front push rod (16) is installed on the hinge shaft (505) of the hinge frame (501). The front push rod (16) and the rear push rod (17) are hinged, and the other end of the rear push rod (17) is installed on the side panel (14) through a hinged support leg. A positioning pin (504) is also provided on the hinge frame (501) to limit the angle at which the front push rod (16) is opened, so that when the side panel folding cable (8) pulls the hinge frame (501), the front push rod (16) does not open beyond 180 degrees and the side panel (14) cannot continue to open and turns to close. A column is installed between the upper and lower sets of rear push rods (17) for mounting the front end of the air spring (19). The push rod is divided into two sections, front and rear, to reduce the pressure angle of the side panel push rod to prevent self-locking, but this is not necessary. The front and rear push rods can be replaced by a straight push rod (903). When using the straight rod push rod (903), the push rod traction plate (502) may not be used, and only one hinge frame (501) may be used. One end of the upper and lower push rods (903) is hinged on the hinge frame (501), and the other end is hinged and fixed on the side plate (14). The two push rods (903) fixed on the side plate (14) are spaced apart by a distance so that the two push rods (903) and the side plate (14) form a triangle with the hinge frame (501) as the vertex. The hinge frame is in the shape of a C-shaped frame, and is provided with a hinge shaft (505) and a positioning pin (504). The positioning pin (504) is not necessary. If a limiting rope is added to the front spring (22) on the front push rod (16), the elongation length of the front spring (22) is limited, which can also play the role of the limiting pin (504).

[0025] FIG7 shows a schematic diagram of the structure of the side panel transverse movement mechanism. The side panel transverse movement mechanism consists of a side panel slide rail (701), a side panel pulley (702), a folding steel cable pulley (703), a push rod fixed shaft (704), a pulley hanger (705), and a folding steel cable fixed beam (706). The side panel slide rail (701) and the folding steel cable fixed beam (706) are fixed to the truss (5), and the two ends of the pulley hanger (705) are fixed to two side panel pulleys (702) that can slide in the side panel slide rail (701). There are two sets of side panel slide rails (701) and pulley hangers (705) that are symmetrical on both sides, and they suspend the symmetrical side panels (14) on both sides respectively. One end of the side panel sling (7) is fixed to the pulley hanger (705), and the other end is fixed to the side panel (14). One end of the side panel folding cable (8) is fixed to the pull ring (502) of the side panel opening mechanism, and the other end passes around the side panel pulley (703) and is fixed to the folding cable fixing beam (706). One end of the side panel balancing cable (12) is fixed to the rear end of the pulley hanger (705), and the other end is fixed to the bottom of the side panel (14), and is located on the vertical axis of the fixing point of the side panel cable (7) on the side panel (14). When the side panel (14) is folded and retracted, the side panel balancing cable (12) can maintain the vertical posture of the side panel (14). When the side panel (14) is opened, all the weight of the side panel (14) acts on the side panel cable (7), and the side panel balancing cable (12) is basically not subjected to force. The folding cable pulley (703) and the push rod fixed shaft (704) are fixed between two pulley hangers (705) and move together with the side panel pulley (702) and the pulley hanger (705). One end of the electric push rod (11) is fixed on the push rod fixed shaft (704), and the other end is fixed on the folding cable fixed beam (706) or fixed on the truss (5). When the electric push rod (11) pushes the pulley hanger (705) to move along the side panel slide rail (701) through the push rod fixed shaft (704), the side panel pulley (703) moves with the pulley hanger (705). Since one end of the side panel folding cable (8) is fixed on the folding cable fixed beam (706), the side panel folding cable (8) that passes over the folding cable pulley (703) will rise, thereby pulling the side panel opening mechanism. The pulley hanger (705) is made of steel plate or square tube, and its front and rear ends are fixed on the pulley (702) sliding in the track (701). Between the two pulley hangers (705), a folding cable pulley (703) is installed near the position of the side plate sling (7). A push rod fixed shaft (704) is installed behind the folding cable pulley (703). The push rod of the electric push rod (11) is fixed on this shaft, and the electric push rod (11) pushes the pulley hanger (705) to move forward and backward through this shaft. The function of the electric push rod (11) is to push the pulley hanger (705) to move horizontally. Therefore, the electric push rod (11) can be replaced by other power devices, such as a hydraulic cylinder, a pneumatic cylinder, an electric winch or a rack and pinion mechanism.

[0026] Figure 8 is a schematic diagram of the side plate transverse movement mechanism. Figure 8 more clearly expresses the mechanical structure of the side plate transverse movement mechanism shown in Figure 7.

[0027] FIG9 is a schematic diagram of the structure of the side panel opening mechanism when the side panel is hoisted on the stage boom. The side panel can be directly hoisted on the stage boom instead of being hoisted on the truss. In this case, four slings are required, two side panel slings (7) and two side panel outer slings (908). The side panel slings (7) are installed on the side panel (14) near the side panel hinge (13), and the side panel outer slings (908) are installed on the outside of the side panel (14) and at a relatively large distance from the top of the side panel. The side panel outer slings (908) have two functions: one is to lift the side panel, and the other is to fold the side panel. The plane formed after the side panel is opened is basically perpendicular to the axis of the stage boom. When the side panel is opened, the distance between the two fixed points of the two side panel outer slings (908) on the side panel (14) is relatively far, about twice the width of the side panel (14). Therefore, the stage boom needs to continue to descend from the side panel landing to the side panel opening. To shorten this stroke, the side panel outer sling (908) is fixed at a position relatively far below the top of the side panel. The greater this distance, the smaller the stage boom stroke required to open the side panel. Since the stage boom moves downward when the side panel is opened, the side panel opening mechanism is somewhat different from when the side panel is hoisted on the truss (5). A boom sling (909) is fixed to the stage boom. The end of the boom sling (909) passes around the movable pulley (906) and is fixed to the side panel hinge shaft (13). When the boom sling (909) is raised or lowered, the movable pulley (906) is driven to rise or fall. The pulley shaft of the movable pulley (906) is connected to the movable pulley sling (902). The movable pulley sling (902) is connected to the upper end of the reverse pull air spring (901). The lower end of the reverse pull air spring is fixed to the lower part of the side panel hinge shaft (13). Casters (910) are installed below the side panel (14). When the stage boom is raised, the reverse pull air spring (901) is extended through the transmission chain. When the stage boom is lowered, the reverse pull air spring (901) is relaxed and the reverse pull air spring (901) contracts. In addition to being connected to the movable pulley sling (902), the upper end of the reverse pull air spring (901) is also connected in parallel to one end of the side panel folding steel cable (8). The other end of the side panel folding steel cable (8) is connected to the push rod hinge (15). When the reverse pull air spring (901) contracts, it pulls the push rod hinge (15) to drive the push rod (903) to open the side panel (14). When the reverse pull air spring (901) is stretched by the stage boom through the transmission chain, the side panel folding steel cable (8) is released. At the same time, the side panel is folded and closed under the pull of the side panel outer sling (908). Finally, the stage boom lifts the side panel together through the side panel sling (7) and the side panel outer sling (908). When the side panels are opened, the outer slings (908) relax as the stage booms descend, causing the outer sides of the side panels to fall to the ground. At this point, the casters (910) support the weight of the outer sides of the side panels. The function of the back-pull air spring (901) is to provide power to the push rod mechanism. A tension spring or a weight can be used instead of the back-pull air spring.A wire rope positioning chuck (905) is installed on the movable pulley sling (902). The wire rope positioning chuck (905) can move with the movable pulley sling (902) and can be fixed at any position. A positioning clamp (904) is installed on the side panel hinge shaft (13). The wire rope positioning chuck (905) is used in conjunction with the positioning clamp (904) to limit the opening angle of the side panel when it is opened. The principle is as follows: when the movable pulley sling (902) descends, the reverse air spring (901) contracts and drives the side panel folding cable (8) to pull the push rod (903) to open the side panel (14). When the wire rope positioning chuck (905) hits the positioning clamp (904), the movable pulley sling (902) cannot continue to descend, and the side panel (14) no longer continues to open and stops at the set position.

[0028] Adaptive changes based on actual needs are all within the scope of protection of this application.

Claims

1. A fully suspended automatic retractable anti-sound cover, which is composed of a truss, a top plate, side plates, a top plate folding sling traction mechanism, a side plate transverse movement mechanism, and a side plate opening mechanism. Its characteristics are as follows: Both the top plate and the side plates are hoisted on the truss; Multiple top plate folding steel cables are arranged on the top plate; A traction plate is arranged on the top plate folding sling traction mechanism. Multiple top plate folding steel cables are connected together through the traction plate. A winch drives the traction plate to move, and the top plate is folded and retracted through the top plate folding steel cables; The side plate transverse movement mechanism uses a slide rail to laterally move the side plates. The slide rail is fixed on the truss, and the side plates are hoisted on a hanging bracket that can move along the slide rail. While the hanging bracket moves, it pulls the side plate folding steel cables, and the side plate folding steel cables open the side plates through a push rod mechanism; When the side plates are hoisted on the stage hanging rod, the side plate opening mechanism uses a tension spring. The tension spring is released by the lowering of the hanging rod, and the side plates are opened by the contraction of the tension spring; When the side plates are hoisted, the outer slings fold the side plates.

2. The fully suspended automatic retractable anti-sound cover according to claim 1, characterized in that, The top plate folding sling traction mechanism is composed of folding slings, a winch, pulleys, a slide rail, hooks, and a traction plate; the slide rail and pulleys are fixed on the truss. One end of the folding steel cable is fixed to the trolley in the slide rail with a hook, and the other end of the folding steel cable is divided into two strands after passing around the pulley and fixed on both sides of the top plate; the traction plate connects multiple hooks together. One end of the traction plate is connected to the winch, and the winch is used to pull the traction plate to drive the folding slings; the hook can be a rope loop made at the end of the folding sling or a joint for fixing the folding sling; the function of the traction plate is to connect multiple hooks together, and the shape of the traction plate can be a flat steel; the function of the slide rail is to enable the hooks to move smoothly horizontally, and the form of the slide rail is a cylindrical track or a linear slide rail; the function of the power device is to provide power, so the power device is a winch, an electric push rod, a gear rack mechanism, or a hydraulic cylinder.

3. The fully suspended automatic retractable anti-sound cover according to claim 1, wherein: The side plate transverse movement mechanism is composed of a slide rail, a trolley hanging bracket, a folding steel cable pulley, and an electric push rod; the slide rail is welded on the truss, and the trolley hanging bracket is fixed on a trolley that can slide in the track. There are two sets of the slide rail and the trolley hanging bracket, which are symmetric left and right. A folding steel cable pulley and a push rod fixed shaft are installed between the two trolley hanging brackets; one end of the electric push rod is fixed on the truss, and the other end of the electric push rod is connected to the push rod fixed shaft. The electric push rod pushes the trolley hanging bracket to move along the slide rail through the push rod fixed shaft; the slide rail is a cylindrical track or a linear slide rail; the electric push rod is the power device of the trolley hanging bracket, and the power device is an electric push rod, a hydraulic cylinder, a pneumatic cylinder, an electric gear rack mechanism, or a winch.

4. The fully suspended automatic retractable anti-sound cover according to claim 1, wherein: A pulley is installed between the two trolley hanging brackets of the side plate transverse movement mechanism. One end of the side plate folding steel cable is fixed on a cross beam of the truss, and the other end of the side plate folding steel cable is connected to the side plate opening mechanism after passing around the folding steel cable pulley; the folding steel cable pulley is fixed between the two trolley hanging brackets, and the folding steel cable pulley moves with the trolley hanging bracket.

5. The fully suspended automatic retractable anti-sound cover according to claim 1, wherein: The pulley hanger of the side panel transverse movement mechanism is also used for suspending the side panels, and the symmetrical side panels are suspended at the front and rear ends of the pulley hanger by using side panel slings and side panel balancing slings respectively; one end of the side panel sling at the front end of the pulley hanger is fixed to the front end of the pulley hanger, and the other end of the side panel sling at the front end of the pulley hanger is fixed to the side panel; one end of the side panel balancing sling of the pulley hanger is fixed to the rear end of the pulley hanger, and the other end of the side panel balancing sling of the pulley hanger is fixed under the side panel and is coaxial with the fixing point of the side panel sling.

6. The fully suspended automatic retractable anti-sound cover according to claim 1, wherein: The side panel opening mechanism is composed of a front push rod, a rear push rod, a push rod traction plate, a hinge frame, a side panel pulley, an air spring and a front spring; one end of the front push rod is installed on the hinge shaft of the hinge frame, the other end of the front push rod is hingedly connected to the rear push rod, and the other end of the rear push rod is hingedly fixed to the side panel; there is also a locating pin on the hinge frame, which is used to limit the opening angle of the front push rod when it is opened; there are two hinge frames, which are installed at the upper and lower ends of a push rod traction plate, the push rods on the hinge frame are symmetrical on the left and right, and two sets of push rods are installed on the upper and lower hinge frames, and there is a column between the upper and lower rear push rods, one end of the air spring is hingedly connected to the column, and the other end of the air spring is hingedly fixed to the side panel. When the side panel is opened, the air The spring is compressed, and when the side panel folding cable is released, the air spring rebounds to fold and close the side panel; the side panel pulley is fixed on the hinge shaft, the upper end of the side panel folding cable passes over the side panel folding pulley and is fixed on the truss, and the other end passes over the side panel pulley and is fixed on the pull ring of the push rod traction plate; it is not necessary to divide the push rod into front and rear push rods. When the side panel is narrow, a straight rod can be used instead of the front and rear push rods; the upper and lower sets of push rods are not necessary. When using a straight rod push rod, the push rod traction plate can be omitted and only one hinge frame is used. One end of the upper and lower push rods is hinged on a hinge frame, and the other end is installed on the side panel with a distance, forming a triangle with the hinge frame as the vertex.

7. The fully suspended automatic retractable anti-sound cover according to claim 1, characterized in that: When the side panel is suspended on the stage boom, the side panel opening mechanism is composed of a push rod, a side panel folding steel cable, an air spring pulley, a reverse air spring, a movable pulley and a positioning card seat; a boom sling is arranged on the movable pulley, one end of the boom sling is fixed on the hinge shaft, and the other end of the boom sling is fixed on the stage boom; a movable pulley sling is installed on the movable pulley, and the other end of the movable pulley sling is connected to the upper end of the reverse air spring; the upper end of the reverse air spring is connected to a side panel folding steel cable in parallel with the movable pulley sling, and the other end of the side panel folding steel cable is fixed on the push rod hinge by bypassing the side panel pulley; the lower end of the reverse air spring is fixed on the side panel hinge shaft, and the function of the reverse air spring is to provide power for the push rod mechanism, and this power is not limited to the reverse air spring, or a tension spring or a heavy hammer is used; a wire rope positioning chuck is installed on the pulley sling; a positioning card seat is also fixed on the side panel hinge shaft, and the positioning card seat is used in conjunction with the wire rope positioning chuck to adjust the opening angle of the side panel.

8. The fully suspended automatic retractable anti-sound cover according to claim 1, wherein: When the side panels are suspended from the stage boom, casters are installed under the side panels.

9. The fully suspended automatic retractable anti-sound cover according to claim 1, wherein: The two top plates are hinged together with the positioning hanger through hinges below the positioning hanger. Two positioning slings are fixed on the positioning hanger. The length of the positioning slings determines the opening angle of the top plate. The upper end of the positioning hanger is fixed on the truss.

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