A large theater stage system and its usage method

Abstract

The present invention relates to a large theater stage system and its usage method. The fixed stage in the theater is convex, and expansion stages are provided in both of its two notches. A driving member is provided at the bottom of the fixed stage, and the power of the driving member is used to drive the two expansion stages to move to the front of the fixed stage, so as to expand the shape of the stage as needed; the main screen is arranged on one side of the theater, and two sub-screens are also provided on both sides of the theater; two equipment rooms are provided in the bottom foundation pit of the theater, and the fixed stage is lapped above the equipment rooms and the foundation pit by a truss to form an expansion space. Two lifting stages are also embedded on the fixed stage, and a lifting mechanism for driving the lifting stages to move up and down is provided in the foundation pit; the lifting mechanism includes a locking component that locks the lifting stage after failure; this stage system can make full use of the space under the stage and can also adjust the shape of the stage to meet the needs of diverse performances.

Description

Technical Field

[0001] The present invention belongs to the technical field of stage equipment and relates to a large theater stage system and a method for using the same. Background Art

[0002] In the traditional stage construction process, the stage is usually connected to the ground through a support frame. Although this structure can ensure the stability of the stage, a large amount of space will be formed therebetween. These spaces are often wasted and cannot be effectively utilized, resulting in a huge waste of space resources. In addition, supporting facilities such as rehearsal rooms, dressing rooms, and equipment rooms in the theater all need to separately occupy a relatively large amount of space. The layout of these rooms is often relatively fixed and difficult to be flexibly adjusted according to the performance requirements, which further affects the actual usable area of the stage. When the theater holds a large-scale performance, the available effective space is limited and it is difficult to meet the needs of diverse performance scenarios.

[0003] In addition, the poor flexibility of the stage is also a major drawback of the existing stage system. After the traditional stage is built, its shape and structure are basically fixed and cannot be adjusted according to the specific requirements of the performance. Whether it is the size, height, or shape of the stage, it is difficult to be quickly and effectively changed. This greatly limits the use scenarios of the stage and makes it difficult to adapt to the increasingly diverse performance requirements. For example, some modern plays may require multiple performance areas to be set up on the stage, or the stage needs to quickly switch scenes, while the existing fixed stage structure cannot meet these requirements. This not only restricts the creative play of the performance but also reduces the use efficiency and adaptability of the theater.

[0004] In view of the above problems, a variable and expandable stage system has emerged as the times require. The design concept of this stage system is precisely to solve the deficiencies of the existing stage in terms of space utilization and flexibility. The variable and expandable stage system adopts a modular design and can quickly adjust the shape, size, and height of the stage according to the performance requirements. Through a flexible support structure and detachable stage panels, the stage can be recombined and configured in a short time, thereby realizing the rapid switching of multiple scenarios. At the same time, this system can also make full use of the space under the stage and design it as a storage equipment room, a temporary rehearsal area, or a storage space, thereby effectively improving the space utilization rate of the theater. The variable and expandable stage system can not only meet the needs of diverse performances but also improve the overall operation efficiency of the theater, bringing a more colorful performance experience to the audience. Summary of the Invention

[0005] In view of this, in order to solve the problems that in the process of existing stage construction, there is a support frame connecting the stage and the ground, a large amount of space will be idle between them, and this space cannot be fully utilized. At the same time, after the stage is built, the shape of the stage cannot be adjusted, resulting in limitations in the use of the stage, the present invention provides a large theater stage system and its usage method.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A large theater stage system includes a fixed stage arranged in the theater. The fixed stage is convex, and expansion stages are provided in both of its two notches. A driving member is provided at the bottom of the fixed stage, and the power of the driving member is used to drive the two expansion stages to move to the front of the fixed stage to expand the shape of the stage as needed.

[0008] A main screen is arranged on one side of the theater. Two sub-screens are also provided on both sides of the theater. The two sub-screens are offset from the main screen and do not affect each other, forming a multi-region display screen.

[0009] A foundation pit is also opened at the bottom of the theater. Two equipment rooms are provided in the foundation pit. The fixed stage is lapped above the equipment rooms and the foundation pit by a truss to form an expansion space. Two lifting stages are also embedded on the fixed stage. A lifting mechanism for driving the lifting stages to move up and down is provided in the foundation pit.

[0010] The lifting mechanism further includes a locking component for locking the lifting stage after the lifting mechanism fails to prevent the lifting stage from falling.

[0011] Further, the driving member includes a slide rail slidably arranged on the bottom truss of the fixed stage. A first hydraulic rod is fixedly arranged at the bottom of the fixed stage. The output end of the first hydraulic rod is fixedly connected to the slide rail. Two relatively arranged second hydraulic rods are fixedly arranged at the bottom of the slide rail. The output ends of the second hydraulic rods are fixedly connected to the corresponding expansion stages. The power of the first hydraulic rod and the two second hydraulic rods is used to drive the expansion stage to move to the front of the fixed stage in an L shape. The first hydraulic rod and the two second hydraulic rods are both connected to an external hydraulic station through pipelines.

[0012] Furthermore, the lifting mechanism includes two groups of first guide rods fixedly arranged in the foundation pit. Two lifting platforms are respectively slidably sleeved on the two groups of first guide rods. Two second rotating seats are fixedly arranged at the bottom of the fixed platform. A rotating shaft is rotatably arranged between the two second rotating seats through a bearing. A hydraulic motor is fixedly arranged on one side of one of the second rotating seats by bolts. The hydraulic motor is connected to an external hydraulic station through a pipeline. The output end of the hydraulic motor is connected to the rotating shaft through a coupling. Two storage rollers are fixedly sleeved on the outer wall of the rotating shaft by bolts. A steel wire rope is fixedly wound around the outer wall of the storage roller. The other end of the steel wire rope is fixedly connected to the bottom of the fixed platform to form a U shape. The lifting platform abuts against the middle section of the two steel wire ropes. Driving the steel wire rope to be tightened by the hydraulic motor can drive the lifting platform to move upward.

[0013] Furthermore, two groups of first rotating seats are fixedly arranged at the bottom of the lifting platform. A pulley is rotatably arranged in the first rotating seat through a rotating shaft and a bearing. A groove adapted to the steel wire rope is formed on the outer wall of each group of pulleys. The pulleys and the steel wire ropes are used to reduce the friction between the steel wire ropes and the lifting platform.

[0014] Furthermore, the locking assembly includes two groups of second fixing blocks fixedly arranged at the bottom of the lifting platform by welding. A third guide rod is fixedly arranged between each group of second fixing blocks by welding. The same sliding plate is sleeved on the two third guide rods. A second spring is sleeved on the outer wall of the third guide rod. The two ends of the second spring are respectively fixedly connected to the mutually close sides of one of the second fixing blocks and the sliding plate. Two second insertion rods are fixedly arranged on one side of the sliding plate by welding. A plurality of second insertion holes adapted to the second insertion rods are formed on one side of each of the two first guide rods located on one side. A connecting member used in cooperation with the steel wire rope is arranged at the bottom of the lifting platform. When the steel wire rope breaks, the connecting member drives the second insertion rods to insert into the corresponding second insertion holes.

[0015] Furthermore, the connecting member includes two sleeve rods fixedly arranged at the bottom of the lifting platform by welding. A second sliding rod is slidably arranged in the sleeve rod. A third rotating seat is fixedly arranged at the bottom of the second sliding rod by welding. A pulley used in cooperation with the steel wire rope is rotatably arranged in the third rotating seat through a rotating shaft and a bearing. A rectangular opening is formed on one side of the sleeve rod. A wedge block used in cooperation with the sliding plate is slidably arranged in the rectangular opening. The wedge block is fixedly arranged on one side of the second sliding rod by welding. The gravity of the second sliding rod, the third rotating seat and the pulley is used to overcome the elastic force of the second spring and drive the sliding plate to approach the two first guide rods.

[0016] Furthermore, handrails are arranged on the lifting platforms. One of the handrails is slidably arranged through the lifting platform and is exposed from the top of the lifting platform in cooperation with the lifting of the lifting platform for the actor to hold when ascending from the foundation pit. A fixing member is arranged at the bottom of the lifting platform to lock the handrail on the lifting platform. After ascending to the position, the fixing member can be used in cooperation with the truss to release the fixation of the handrail to avoid the handrail hindering the actor from walking.

[0017] Furthermore, the fixing member includes two mounting seats sleeved on the handrail. The mounting seats are fixedly connected to the lifting platform by welding. One side of the mounting seat is provided with a first sliding rod penetrating and sliding therein. One side of the first sliding rod is fixedly provided with a first insertion rod. A first insertion hole for cooperating with the first insertion rod is opened on the outer wall of the handrail. One side of the first sliding rod is fixedly provided with a first fixing block. A first spring for driving the first sliding rod to move is arranged between the first fixing block and the mounting seat. An inclined surface for cooperating with the truss is opened at the top of one end of the first sliding rod.

[0018] Furthermore, a second guiding rod penetrates and slides through one side of the first fixing block. One end of the second guiding rod is welded to the mounting seat. The first spring is sleeved on the second guiding rod and is located between the first fixing block and the mounting seat.

[0019] A using method of a large theater stage system, which is applied to the above-mentioned large theater stage system, includes the following steps:

[0020] S1. Start the hydraulic motor on the right side of the theater to rotate in the reverse direction, and transport the staff and performers to the foundation pit.

[0021] S2. Start the hydraulic motor on the left side to rotate forward, and transport the performers to the fixed platform.

[0022] S3. According to the demonstration effect, start the first hydraulic rod and the second hydraulic rod to move the extension platforms on both sides of the fixed platform to the front of the fixed platform, so as to change the shape of the stage.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. For the large theater stage system disclosed by the present invention, by opening a foundation pit on the ground and building a fixed platform and extension platforms on the top of the foundation pit, a space can be formed in the foundation pit, and equipment rooms, dressing rooms, rehearsal rooms and other spaces can be arranged in this space, so that there is no need to set these spaces on the ground additionally, which can greatly improve the utilization of the theater space.

[0025] 2. For the large theater stage system disclosed by the present invention, by driving the hydraulic motor to rotate in the reverse direction by an external hydraulic station, the lifting operation of the lifting platform can be easily realized, providing a fast and safe up-and-down stage passage for the performers and staff. During the lifting process, the release and storage of the steel wire rope are automatically completed by the rotating shaft and the storage roller without manual intervention, improving the work efficiency.

[0026] 3. The large theater stage system disclosed by the present invention, through the combined use of the second sliding rod and the steel wire rope, when the steel wire rope breaks, components such as the wedge block and the sliding plate can respond quickly, and the lifting platform is fixed by inserting the second insertion rod into the second jack, effectively preventing the sudden fall of the lifting platform and ensuring the safety of personnel.

[0027] 4. The large theater stage system disclosed by the present invention, through the synergistic action of the first hydraulic rod and the second hydraulic rod, can easily realize the movement and splicing of the extended platform, so as to quickly change the shape and size of the stage according to the performance requirements. The splicing design of the extended platform and the fixed platform not only increases the length of the stage, but also maintains the flatness and stability of the stage, providing a broader space and better visual effects for the performance.

[0028] In summary, the large theater stage system can make full use of the space under the stage through the setting of the foundation pit, and at the same time can realize the stable lifting of the lifting platform and the automatic fixing of the handrail through hydraulic drive, ensuring the safe and convenient access of the performers to and from the stage. At the same time, it has an automatic protection mechanism for steel wire rope breakage, effectively preventing the falling accident of the lifting platform. In addition, the shape of the stage can be flexibly adjusted according to the needs, and the extended platform is pushed by the hydraulic rod to move and splice, increasing the length of the stage and meeting the diverse performance requirements. The overall design is efficient, safe and flexible.

[0029] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail preferably with reference to the accompanying drawings, wherein:

[0031] Figure 1 is a three-dimensional structural schematic diagram of the large theater stage system of the present invention;

[0032] Figure 2 is the present invention Figure 1 Another perspective structural schematic diagram of the large theater stage system;

[0033] Figure 3 is the present invention Figure 1 A cross-sectional view of the large theater stage system;

[0034] Figure 4 is the present invention Figure 1 A structural schematic diagram of the driving member in the present invention;

[0035] Figure 5For the present invention Figure 1 Schematic diagram of the installation structure of the lifting platform and the handrail in the present invention;

[0036] Figure 6 For the present invention Figure 1 Cross-sectional view of the mounting base in the present invention;

[0037] Figure 7 For the present invention Figure 1 Schematic diagram of the connection between the wedge block and the sliding plate in the present invention.

[0038] Reference numerals: 1, theater; 2, fixed platform; 3, extension platform; 4, secondary screen; 5, main screen; 6, foundation pit; 7, equipment room; 8, first guide rod; 9, lifting platform; 10, handrail; 11, slide rail; 12, first hydraulic rod; 13, second hydraulic rod; 14, first rotating seat; 15, pulley; 16, second rotating seat; 17, rotating shaft; 18, hydraulic motor; 19, storage roller; 20, steel wire rope; 21, mounting base; 22, first insertion rod; 23, first insertion hole; 24, first sliding rod; 25, first fixing block; 26, second guide rod; 27, first spring; 28, inclined surface; 29, second sliding rod; 30, third rotating seat; 31, rectangular opening; 32, wedge block; 33, second fixing block; 34, third guide rod; 35, second spring; 36, second insertion rod; 37, second insertion hole; 38, sleeve rod; 39, sliding plate. Detailed implementation manners

[0039] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0040] As Figures 1-7 Shown is a large theater stage system. The entire system is constructed inside the theater 1. A foundation pit 6 is opened at the bottom of the theater 1 (cast with C30 concrete, equipped with a waterproof coating and a drainage system). There are two equipment rooms 7 in the foundation pit 6 (made of 304 stainless steel frame + fireproof and soundproof board), so that the equipment rooms 7 do not need to use external space, and the foundation pit 6 can be used for actors to rehearse and line up. The bottom of the convex-shaped fixed platform 2 (the main body is a welded truss of Q345B high-strength steel, and the surface is covered with a flame-retardant wood floor) is stably lapped above the two equipment rooms 7 in the foundation pit 6 at the bottom of the theater 1 through a truss, forming a stable expansion space inside the foundation pit. At each of the two notches of the fixed platform 2, there is a movable extension platform 3. In order to realize the movement of the extension platform 3, a driving member is provided at the bottom of the fixed platform 2.

[0041] Specifically, the driving member includes a slide rail 11 slidably arranged on the truss at the bottom of the fixed table 2, and a first hydraulic rod 12 fixed to the bottom of the fixed table 2. The output end of the first hydraulic rod 12 is connected to the slide rail 11, and two relatively arranged second hydraulic rods 13 are fixed to the bottom of the slide rail 11. The output ends of the two second hydraulic rods 13 are respectively connected to the two extension tables 3. Through the coordinated work of the first hydraulic rod 12 and the second hydraulic rod 13, the extension table 3 can be driven to move in an L shape to the front of the fixed table 2, so as to adjust the shape of the stage as needed. These hydraulic rods are all connected to an external hydraulic station through pipelines to achieve power supply and control, and at the same time can reduce the noise generated during movement. The hydraulic station adopts a dual-pump redundancy design, the system pressure is set above 20 MPa, and the oil circuit is equipped with an accumulator to cope with instantaneous loads.

[0042] On one side of the theater 1, a main screen 5 is provided for displaying the main stage images. On both sides of the theater 1, a sub-screen 4 is provided respectively. The two sub-screens 4 are misaligned with the main screen 5 but do not affect each other, and can form a multi-region display image, providing a more rich and three-dimensional visual experience for the audience.

[0043] Two lifting platforms 9 (the frame is made of 6061-T6 aluminum alloy and the tabletop is made of anti-slip pattern steel plate) are also embedded on the fixed table 2. These two lifting platforms 9 are used for the lifting of actors or props, so that they can move from the foundation pit 6 to the fixed table 2. The lifting function of the lifting platform 9 is realized by a lifting mechanism arranged in the foundation pit 6. The lifting mechanism includes two groups of first guide rods 8 fixedly arranged in the foundation pit 6, and the two lifting platforms 9 are respectively slidably sleeved on the two groups of first guide rods 8. In order to realize the lifting of the lifting platform 9, two second rotating seats 16 are fixedly arranged at the bottom of the fixed table 2. A rotating shaft 17 is rotatably arranged between the two second rotating seats 16 through a bearing. On one side of one of the second rotating seats 16, a hydraulic motor 18 is fixedly arranged by bolts. The hydraulic motor 18 is connected to an external hydraulic station through a pipeline, and its output end is connected to the rotating shaft 17 through a coupling. Two storage rollers 19 are fixedly sleeved on the outer wall of the rotating shaft 17 by bolts. A steel wire rope 20 (6×19+FC structure, breaking tensile force ≥100 kN) is fixed and wound around the outer wall of the storage roller 19. The other end of the steel wire rope 20 is fixedly connected to the bottom of the fixed table 2 to form a U shape. When the hydraulic motor 18 works, it drives the rotating shaft 17 to rotate, and then drives the storage roller 19 to rotate, so that the steel wire rope 20 is tightened and drives the lifting platform 9 to move upward. During the descending process, the hydraulic motor 18 is started in the reverse direction to drive the rotating shaft 17 to rotate, and the stored steel wire rope 20 is released. At this time, the lifting platform 9 can move downward under its own gravity.

[0044] In order to reduce the friction between the steel wire rope 20 and the lifting platform 9, two groups of first rotating seats 14 are fixedly arranged at the bottom of the lifting platform 9. A pulley 15 is rotatably arranged in the first rotating seat 14 through a rotating shaft and a bearing. A groove adapted to the steel wire rope 20 is formed on the outer wall of each group of pulleys 15, so that the steel wire rope 20 can smoothly slide over the pulley 15, reducing friction and wear.

[0045] In order to ensure the safety of the lifting platform 9 during the lifting process, the lifting mechanism further includes a locking component. The locking component includes two groups of second fixing blocks 33 fixedly arranged at the bottom of the lifting platform 9 by welding. A third guiding rod 34 is fixedly arranged between each group of second fixing blocks 33 by welding. The same sliding plate 39 is sleeved on the two third guiding rods 34, and a second spring 35 is sleeved on the outer wall of the third guiding rod 34. The two ends of the second spring 35 are respectively fixedly connected to the mutually close sides of one of the second fixing blocks 33 and the sliding plate 39. Two second inserting rods 36 are fixedly arranged on one side of the sliding plate 39 by welding, and a plurality of second inserting holes 37 adapted to the second inserting rods 36 are formed on one side of the two first guiding rods 8. When the steel wire rope 20 breaks, the connecting piece will drive the second inserting rod 36 to insert into the corresponding second inserting hole 37, thereby locking the lifting platform 9 to prevent it from falling.

[0046] The specific structure of the connecting piece is as follows: It includes two sleeve rods 38 fixedly arranged at the bottom of the lifting platform 9 by welding. A second sliding rod 29 is slidably arranged in the sleeve rod 38. A third rotating seat 30 is fixedly arranged at the bottom of the second sliding rod 29 by welding. A pulley 15 used in cooperation with the steel wire rope 20 is rotatably arranged in the third rotating seat 30 through a rotating shaft 17 and a bearing. A rectangular opening 31 is formed on one side of the sleeve rod 38, and a wedge block 32 used in cooperation with the sliding plate 39 is slidably arranged in the rectangular opening 31. The wedge block 32 is fixedly arranged on one side of the second sliding rod 29 by welding. When the steel wire rope 20 breaks, the gravity of the second sliding rod 29, the third rotating seat 30 and the pulley 15 will overcome the elastic force of the second spring 35, driving the sliding plate 39 to approach the two first guiding rods 8, so that the second inserting rod 36 is inserted into the second inserting hole 37 to realize the locking of the lifting platform 9.

[0047] In addition, a handrail 10 (304 stainless steel pipe with a wall thickness of 3 mm) is also arranged on the lifting platform 9. One of the handrails 10 is slidably arranged through the lifting platform 9, and the handrail 10 is exposed from the top of the lifting platform 9 in cooperation with the lifting of the lifting platform 9 for the actor to hold when rising from the foundation pit 6. Fixing pieces are arranged at the bottom of the lifting platform 9 for locking the handrail 10 on the lifting platform 9. When the lifting platform 9 rises in place, the fixing pieces can be used in cooperation with the truss to release the fixing of the handrail 10. At this time, the handrail 10 can move downward and reset under its own gravity, avoiding the handrail 10 from hindering the actor's movement.

[0048] The specific structure of the fixing member is as follows: It includes two mounting seats 21 sleeved on the handrail 10, and the mounting seats 21 are fixedly connected to the lifting platform 9 by welding. A first sliding rod 24 is slidably arranged through one side of the mounting seat 21, and a first insertion rod 22 is fixedly arranged on one side of the first sliding rod 24. A first insertion hole 23 for cooperating with the first insertion rod 22 is formed in the outer wall of the handrail 10. A first fixing block 25 is fixedly arranged on one side of the first sliding rod 24, and a first spring 27 for driving the first sliding rod 24 to move is arranged between the first fixing block 25 and the mounting seat 21. An inclined surface 28 for cooperating with the truss is formed at the top of one end of the first sliding rod 24. When the lifting platform 9 rises in place, the truss will press the inclined surface 28, causing the first sliding rod 24 to slide inside the mounting seat 21 and driving the first insertion rod 22 to disengage from the first insertion hole 23, thereby releasing the locking of the first insertion rod 22 on the handrail 10.

[0049] To ensure the stable sliding of the first sliding rod 24, a second guiding rod 26 is slidably arranged through one side of the first fixing block 25, and one end of the second guiding rod 26 is welded to the mounting seat 21. The first spring 27 is sleeved on the second guiding rod 26 and is located between the first fixing block 25 and the mounting seat 21. In this way, when the truss presses the inclined surface 28, the first sliding rod 24 can slide stably along the second guiding rod 26, and at the same time, the first spring 27 can provide the necessary elastic force to ensure that the first insertion rod 22 can be accurately inserted into or pulled out of the first insertion hole 23.

[0050] When the large theater stage system is in use, performers and staff stand on the right lifting platform 9. By starting the hydraulic motor 18 on the right side of the theater 1 to rotate in the reverse direction through an external hydraulic station, the rotating shaft 17 can be driven to rotate. The rotation of the rotating shaft 17 can drive the storage roller 19 to rotate, and the steel wire rope 20 on the storage roller 19 is released. During the release process, the lifting platform 9 can move downward under gravity until it reaches the bottom, and then personnel can enter the foundation pit 6 to wait for the performance, make-up, and rehearsal.

[0051] When on stage, start the hydraulic motor 18 on the left to rotate in the reverse direction, release the steel wire rope 20 on the storage roller 19, so that the lifting platform 9 on the left moves downward. During the downward movement, it can drive the handrail 10 above to move downward. When the handrail 10 touches the ground, continuing to move downward can make the lifting platform 9 move downward on the handrail 10 until it moves in place. At this time, the first insertion rod 22 corresponds to the first insertion hole 23, and the first fixing block 25 can reset and move under the action of the first spring 27, driving the first sliding rod 24 to move. The movement of the first sliding rod 24 can drive the first insertion rod 22 to insert into the first insertion hole 23 to fix the handrail 10 on the lifting platform 9. Then the performer stands on the lifting platform 9 on the left, holds the handrail 10, and then starts the hydraulic motor 18 to rotate forward, driving the storage roller 19 to rotate. During the rotation of the storage roller 19, the steel wire rope 20 can be stored. During the storage of the steel wire rope 20, it drives the lifting platform 9 to move upward, so as to transport the performer from the foundation pit 6 to the fixed platform 2. After the lifting platform 9 moves upward in place, the first sliding rod 24 drives the first sliding rod 24 to move to the right under the action of the inclined surface 28 and the support frame. The movement of the first sliding rod 24 can drive the first insertion rod 22 to disengage from the first insertion hole 23. At this time, the handrail 10 can automatically descend under gravity to avoid affecting the movement of people.

[0052] During the process of winding and unwinding the steel wire rope 20, when the steel wire rope 20 breaks, the third rotating seat 30 can move downward under the action of gravity, driving the second sliding rod 29 to move downward. The downward movement of the second sliding rod 29 can drive the wedge block 32 to move downward. During the downward movement of the wedge block 32, it can push the sliding plate 39 to move on the two third guide rods 34, compress the second spring 35, and at the same time drive the second insertion rod 36 to move towards the first guide rod 8, so that the second insertion rod 36 inserts into the corresponding second insertion hole 37 to fix the lifting platform 9 and avoid accidents caused by sudden falling.

[0053] When it is necessary to change the shape of the stage, the first hydraulic rod 12 can be started to push the slide rail 11 to move on the support frame below. During the movement, it can drive the two second hydraulic rods 13 to move. The movement of the two second hydraulic rods 13 can drive the two extension platforms 3 to move forward at the same time. When the two extension platforms 3 are completely moved to the front of the fixed platform 2, then start the two second hydraulic rods 13 to retract, which can drive the two extension platforms 3 to move towards each other, so that they are spliced in front of the fixed platform 2 to increase the length of the stage.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the present technical solution, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A large theater stage system, characterized in that: The fixed platform (2) is arranged in a theater (1), the fixed platform (2) is convex, and expansion platforms (3) are arranged in two notches of the fixed platform (2). A driving member is arranged at the bottom of the fixed platform (2), and the two expansion platforms (3) are driven by the power of the driving member to move to the front of the fixed platform (2), so as to expand the shape of the stage as required; A main screen (5), the main screen (5) is arranged on one side of the theater (1), and two auxiliary screens (4) are arranged on both sides of the theater (1), the two auxiliary screens (4) and the main screen (5) are offset from each other and do not affect each other, so as to form a multi-area display screen; A foundation pit (6) is provided at the bottom of the theater (1), two equipment rooms (7) are provided in the foundation pit (6), a fixed platform (2) is overlapped on the equipment room (7) and the top of the foundation pit (6) by means of trusses to form an expansion space, two lifting platforms (9) are also embedded on the fixed platform (2), and a lifting mechanism for driving the lifting platforms (9) to move upward and downward is provided in the foundation pit (6); the lifting mechanism includes a locking component for locking the lifting platforms (9) after failure to prevent the lifting platforms (9) from falling.

2. The large theater stage system according to claim 1, characterized in that: The driving member comprises a slide rail (11) slidably arranged on a truss at the bottom of the fixed platform (2); a first hydraulic rod (12) is fixedly arranged at the bottom of the fixed platform (2); an output end of the first hydraulic rod (12) is fixedly connected to the slide rail (11); two second hydraulic rods (13) set opposite to each other are fixedly arranged at the bottom of the slide rail (11); output ends of the second hydraulic rods (13) are fixedly connected to corresponding expansion platforms (3); the expansion platforms (3) are driven to move in an L shape to the front of the fixed platform (2) by the power of the first hydraulic rod (12) and the two second hydraulic rods (13); the first hydraulic rod (12) and the two second hydraulic rods (13) are connected to an external hydraulic station through pipelines.

3. The large theater stage system according to claim 2, characterized in that: The lifting mechanism comprises two groups of first guide rods (8) fixedly arranged in the foundation pit (6), two lifting platforms (9) respectively slidably sleeved on the two groups of first guide rods (8), two second rotating seats (16) fixedly arranged at the bottom of the fixed platform (2), a rotating shaft (17) rotatably arranged between the two second rotating seats (16) via a bearing, a hydraulic motor (18) fixedly arranged on one side of one of the second rotating seats (16) via bolts, the hydraulic motor (18) is connected to an external hydraulic station via a pipeline, the output end of the hydraulic motor (18) is connected to the rotating shaft (17) via a coupling, two storage rollers (19) are sleeved on the outer wall of the rotating shaft (17) via bolts, a steel wire rope (20) is fixedly arranged on the outer wall of the storage roller (19), the other end of the steel wire rope (20) is fixedly connected to the bottom of the fixed platform (2) to form a U-shape, the lifting platform (9) contacts the middle sections of the two steel wire ropes (20), and the lifting platform (9) is driven by the hydraulic motor (18) to tighten the steel wire rope (20) to drive the lifting platform (9) to move upward.

4. The large theater stage system according to claim 3, characterized in that: Two groups of first rotating seats (14) are fixedly provided at the bottom of the lifting platform (9), and pulleys (15) are rotatably provided in the first rotating seats (14) via rotating shafts and bearings. The outer wall of each group of pulleys (15) is provided with a groove adapted to the steel wire rope (20), and the pulleys (15) and the steel wire rope (20) are used to reduce the friction between the steel wire rope (20) and the lifting platform (9).

5. The large theater stage system according to claim 4, characterized in that: The locking assembly comprises two groups of second fixing blocks (33) fixedly arranged at the bottom of the lifting platform (9) by welding, a third guide rod (34) is fixedly arranged between each group of second fixing blocks (33) by welding, the two third guide rods (34) are sleeved with the same sliding plate (39), the outer wall of the third guide rod (34) is sleeved with a second spring (35), the two ends of the second spring (35) are respectively fixedly connected to one side of one of the second fixing blocks (33) and the sliding plate (39) close to each other, two second insertion rods (36) are fixedly arranged on one side of the sliding plate (39) by welding, a plurality of second insertion holes (37) matched with the second insertion rods (36) are opened on one side of the two first guide rods (8) located on one side, and a connecting piece used in conjunction with the steel wire rope (20) is provided at the bottom of the lifting platform (9), and when the steel wire rope (20) breaks, the connecting piece drives the second insertion rod (36) to be inserted into the corresponding second insertion hole (37).

6. The large theater stage system according to claim 5, characterized in that: The connecting member comprises two sleeve rods (38) fixedly arranged at the bottom of the lifting platform (9) by welding, a second sliding rod (29) is slidably arranged in the sleeve rods (38), a third rotating seat (30) is fixedly arranged at the bottom of the second sliding rod (29) by welding, a pulley (15) used in conjunction with the wire rope (20) is rotatably arranged in the third rotating seat (30) through a rotating shaft (17) and a bearing, a rectangular opening (31) is opened on one side of the sleeve rod (38), a wedge block (32) used in conjunction with the sliding plate (39) is slidably arranged in the rectangular opening (31), the wedge block (32) is fixedly arranged on one side of the second sliding rod (29) by welding, and the gravity of the second sliding rod (29), the third rotating seat (30) and the pulley (15) is used to overcome the elastic force of the second spring (35), so as to drive the sliding plate (39) to approach the two first guide rods (8).

7. The large theater stage system according to claim 1, characterized in that: The lifting platform (9) is provided with a handrail (10), one of which is slidably arranged on the lifting platform (9), and cooperates with the lifting of the lifting platform (9) so that the handrail (10) is exposed from the top of the lifting platform (9) to support the actors when they rise from the foundation pit (6). The bottom of the lifting platform (9) is provided with a fixing piece to lock the handrail (10) on the lifting platform (9), and after the lifting platform (9) is in place, the fixing piece can be used in conjunction with the truss to release the fixing of the handrail (10), so as to prevent the handrail (10) from hindering the actors from walking.

8. The large theater stage system according to claim 7, characterized in that: The fixing member comprises two mounting seats (21) sleeved on the handrail (10), the mounting seats (21) being fixedly connected to the lifting platform (9) by welding, a first sliding rod (24) slidingly extending through one side of the mounting seat (21), a first insertion rod (22) being fixedly provided on one side of the first sliding rod (24), a first insertion hole (23) for use with the first insertion rod (22) being provided on the outer wall of the handrail (10), a first fixing block (25) being fixedly provided on one side of the first sliding rod (24), a first spring (27) for driving the first sliding rod (24) to move being provided between the first fixing block (25) and the mounting seat (21), and an inclined surface (28) for use with the truss being provided on the top of one end of the first sliding rod (24).

9. The large theater stage system according to claim 8, characterized in that: A second guide rod (26) is slidably provided through one side of the first fixing block (25), one end of the second guide rod (26) is welded to the mounting seat (21), and a first spring (27) is sleeved on the second guide rod (26) and is located between the first fixing block (25) and the mounting seat (21).

10. The method for using the large theater stage system according to any one of claims 3 to 9, characterized in that: The following steps are involved: S1, starting the hydraulic motor (18) on the right side of the theater (1) to rotate in the reverse direction, so as to transport the staff and performers into the foundation pit (6); S2, starting the left starting hydraulic motor (18) to rotate forward, and transporting the performers to the fixed platform (2); S3. According to the demonstration effect, the first hydraulic rod (12) and the second hydraulic rod (13) are activated to move the expansion platform (3) on both sides of the fixed platform (2) to the front of the fixed platform (2), thereby changing the shape of the stage to meet different needs.

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