Large lifting stage with combination of double-section scissor forks and rigid chains

Abstract

A double-section scissor fork and rigid chain combined large lifting stage relates to the technical field of performance stage props and comprises a stage and a base, a middle-layer steel frame, a rigid chain, a rigid chain driving unit and an upright scissor fork are arranged between the stage and the base, and the stage comprises a stage surface and a stage surface steel frame fixedly connected with the bottom of the stage surface. The middle-layer steel frame comprises two middle track beams arranged in the front-back direction, cross beams are arranged between the ends of the middle track beams respectively, the rigid chain driving unit is in transmission connection with the rigid chains, and the upright shear forks are located in the lifting stage in the front-back direction, the number of the upright shear forks is eight, and the upright shear forks are symmetrically arranged in a front-back double-row mode, a left-right two-column mode and an upper-lower two-layer mode. According to the large lifting stage, the design scheme that the two-section scissor fork structure and the rigid chain are combined is adopted, the higher lifting stroke can be achieved, the load of the large lifting stage is larger, the requirement of a performance stage with a larger area is met, and meanwhile the performance stage has better stability compared with an existing lifting stage during performance activities.

Description

Technical Field

[0001] The utility model relates to the technical field of performance stage props, in particular to a large lifting stage composed of a double-section scissor fork and a rigid chain. Background Art

[0002] With the continuous improvement of living standards, audiences have higher and higher requirements for the effects of cultural and artistic performances. As an indispensable part of the performance supporting facilities, the stage plays an important role in the performance effect.

[0003] Among them, the ability to lift and lower is a common feature of existing stages, which can be achieved through a scissor-fork lift mechanism or a rigid chain lift mechanism. However, existing stages that use a double-layer combined scissor-fork lift mechanism have a relatively small load capacity, resulting in a small stage performance area and poor stage stability during performances. In addition, the lifting stroke is insufficient, requiring greater expansion space. For stages using a rigid chain lift mechanism, the rigid chain length must match the lifting stroke, resulting in high construction costs and low space utilization. Utility Model Content

[0004] The purpose of the utility model is to solve the deficiencies of the above-mentioned prior art and provide a large lifting stage composed of a double-section scissor fork and a rigid chain. The double-section scissor fork structure and the rigid chain combination design adopted can achieve a higher lifting stroke and a larger load, meeting the needs of a larger performance stage. At the same time, the performance stage has better stability during performances than the existing lifting stage.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is as follows:

[0006] A large-scale lifting stage, combining a double-section scissor fork and a rigid chain, comprises a stage and a base, with an intermediate steel frame, a rigid chain, a rigid chain drive unit, and upright scissor forks disposed between the stage and the base. The stage comprises a stage surface and a steel frame fixedly connected to its bottom. Upper mounting blocks are provided on the left and right sides of the steel frame, while lower mounting blocks are provided on the left and right sides of the base.

[0007] The intermediate steel frame includes two middle rail beams arranged front and back, with cross beams respectively arranged between the ends of the middle rail beams, a middle mounting seat is arranged on the outside of the connection between the middle rail beams and the cross beams, and a connecting plate is arranged at the bottom. The rigid chains are four groups, and the upper ends are fixedly connected to the connecting plates respectively. The rigid chain drive unit is connected to the rigid chain transmission. The middle rail beams and cross beams form a square frame.

[0008] The upright scissors fork comprises two intermediate hinged support links arranged front and back in the lifting stage. The number of upright scissors forks is eight, which are symmetrically arranged in front and back double rows, left and right two columns, and upper and lower two layers. The upper outer end of the upper layer of upright scissors forks is hinged to the upper mounting seat, and the upper inner end is provided with an upper roller and in rolling contact with the stage steel frame. The stage steel frame has a track structure matched with the upper roller. The lower outer end of the upper layer of upright scissors forks and the upper outer end of the lower layer of upright scissors forks are hinged to the middle mounting seat through a rotating shaft, and the lower inner end of the upper layer of upright scissors forks and the upper inner end of the lower layer of upright scissors forks are hinged and coaxially provided with a middle roller. The middle roller is in rolling contact with the middle track beam. The lower outer end of the lower layer of upright scissors forks is hinged to the lower mounting seat, and the lower inner end is provided with a lower roller and in rolling contact with the base. In the initial state, the stage is at a low position, and the rigid chain drive unit drives the rigid chain. The upper end of the rigid chain rises to drive the intermediate layer steel frame to rise, and the upright scissors fork rotates. The upper roller, the middle roller and the lower roller roll to the sides, and the stage rises to a set high position.

[0009] As a preferred, the base is provided with two lower track beams in front and back, and the lower roller is in rolling contact with the lower track beam, so that the movement of the lower roller is smoother, and the movement stroke of the lower roller can be limited.

[0010] As a preferred, the middle section of the middle track beam is provided as a concave section, and the middle roller is in rolling contact with the concave section, so that the movement stroke of the middle roller can be limited.

[0011] As a preferred, a plurality of web members are connected between the two middle track beams, so as to improve the structural strength of the intermediate layer steel frame.

[0012] As a preferred, the rigid chain drive unit is provided with a brake to realize the functions of deceleration, stopping or maintaining the stopping state.

[0013] As a preferred, the number of rigid chain drive units is two, which are symmetrically distributed left and right. The rigid chain drive units are provided with universal joints to synchronously drive the two groups of rigid chains.

[0014] As a preferred, one side or both sides of the upper roller, the middle roller and the lower roller are provided with a convex ring to limit and guide the movement.

[0015] Preferably, the lifting stage further comprises side-mounted scissor forks, located on the left and right sides of the lifting stage. There are four sets of them, arranged symmetrically in two rows, upper and lower layers. The upper end of the side scissor forks on the upper layer is hinged to the upper mounting seat, and the other upper end is provided with a roller and in rolling contact with the tabletop steel frame. The lower end of the side scissor forks on the upper layer and the upper end of the side scissor forks on the lower layer are hinged via a rotating shaft. The lower end of the side scissor forks on the lower layer is hinged to the lower mounting seat, and the other lower end is provided with a roller and in rolling contact with the base. The lifting stroke of the side scissor forks is the same as that of the upright scissor forks, and the side scissor forks are not connected to the intermediate layer steel frame.

[0016] Preferably, the lifting stage further comprises side-mounted scissor forks, located on the left and right sides of the lifting stage. There are eight sets of them, arranged symmetrically in two rows, front and back, and upper and lower layers. The upper outer ends of the side scissor forks on the upper layer are hinged to the upper mounting seat, and the upper inner ends are provided with rollers that are in rolling contact with the tabletop steel frame. The lower ends of the side scissor forks on the upper layer and the upper ends of the side scissor forks on the lower layer are hinged via a rotating shaft. The lower outer ends of the side scissor forks on the lower layer are hinged to the lower mounting seat, and the lower inner ends are provided with rollers that are in rolling contact with the base. The lifting stroke of the side scissor forks is the same as that of the upright scissor forks, and the side scissor forks are not connected to the intermediate layer steel frame.

[0017] Preferably, the number and positions of the mounting seats of the lifting stage correspond to the connecting ends of the scissors forks.

[0018] The advantages of the present invention are: 1. Compared with the existing double-layer combined scissor fork lifting stage, the large lifting stage of the present invention adopts a double-section scissor fork structure and a rigid chain combination design scheme, which can achieve a higher lifting stroke and a larger load, meeting the needs of a larger performance stage. At the same time, the performance stage has better stability than the existing lifting stage during performances.

[0019] 2. Compared with existing rigid chain lift stages with the same lift travel, the large-scale lift stage of this utility model uses a double-section scissor fork structure combined with a rigid chain design, which reduces the required rigid chain length by half, thus reducing the required floor plan, making it more efficient in space utilization and reducing construction costs to a certain extent. Furthermore, it meets the needs of theaters that lack the capacity for deep foundation pits to install large-stroke lift stages. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The main view of this utility model Figure 1 (The stage is at a low level);

[0021] Figure 2 The main view of this utility model Figure 2 (The stage is at a low elevation);

[0022] Figure 3 for Figure 1 Cross-sectional view along the AA axis;

[0023] Figure 4 for Figure 1 Cross-sectional view along the BB direction;

[0024] Figure 5 for Figure 3 Cross-section view in the CC direction Figure 1 (The stage is at a low level);

[0025] Figure 6 for Figure 3 Cross-section view in the CC direction Figure 2 (The stage is at a high position);

[0026] Figure 7 This is a front view of four sets of upright scissor forks in the utility model;

[0027] Figure 8 This is the main view of the middle layer steel frame of the utility model;

[0028] Figure 9 This is a front view of the upper roller, middle roller, and lower roller of the utility model;

[0029] Figure 10 for Figure 3 Cross-section along the DD direction Figure 1 (The stage is at a low level);

[0030] Figure 11 for Figure 3 Cross-section along the DD direction Figure 2 (The stage is at an elevated position).

[0031] Description of the main component symbols in the figure:

[0032] 10. Stage; 11. Stage surface; 12. Stage steel frame; 13. Upper mounting base;

[0033] 20. Base; 21. Lower mounting seat; 22. Lower track beam;

[0034] 30. Intermediate steel frame; 31. Middle track beam; 31.1. Concave section; 32. Crossbeam; 33. Middle mounting seat; 34. Connecting plate; 35. Web member;

[0035] 40. Rigid chain;

[0036] 50. Rigid chain drive unit; 51. Brake; 52. Universal joint;

[0037] 60. Upright scissor fork; 61. Upper roller; 62. Middle roller; 63. Lower roller; 64. Raised ring;

[0038] 70. Side-mounted scissors fork;

[0039] 100. Rotating axis. DETAILED DESCRIPTION

[0040] In order to more clearly illustrate the present invention, the present invention will be further described below with reference to the accompanying drawings.

[0041] Example 1: Figure 1-3 As shown, a large lifting stage composed of a double-section scissor fork and a rigid chain includes a stage 10 and a base 20. An intermediate steel frame 30, a rigid chain 40, a rigid chain driving unit 50 and an upright scissor fork 60 are arranged between the stage 10 and the base 20.

[0042] The stage 10 includes a stage surface 11 and a stage steel frame 12 fixedly connected to the bottom thereof, and upper mounting seats 13 are provided on the left and right sides of the stage steel frame 12. Lower mounting seats 21 are provided on the left and right sides of the base 20.

[0043] Combine Figure 4 and Figure 8 As shown, the middle layer steel frame 30 includes two middle track beams 31 arranged in front and back, and cross beams 32 are respectively arranged between the ends of the middle track beams 31. A middle mounting seat 33 is arranged on the outside of the connection part between the middle track beam 31 and the cross beam 32, and a connecting plate 34 is arranged at the bottom.

[0044] Combine Figure 3-6 As shown, there are four groups of rigid chains 40 , the upper ends of which are fixedly connected to the connecting plates 34 , and the rigid chain driving units 50 are in transmission connection with the rigid chains 40 .

[0045] Combine Figure 7 As shown, the upright scissors forks 60 are located at the front and back of the lifting stage, and there are eight groups of them, which are symmetrically arranged in double rows in front and back, two columns in left and right, and two layers in upper and lower levels. The upper outer end of the upright scissors fork 60 on the upper level is hinged to the upper mounting seat 13, and the upper inner end is provided with an upper roller 61 and is in rolling contact with the table steel frame 12. The lower outer end of the upright scissors fork 60 on the upper level and the upper outer end of the upright scissors fork 60 on the lower level are hinged to the middle mounting seat 33 through the rotating shaft 100. The lower inner end of the upright scissors fork 60 on the upper level and the upper inner end of the upright scissors fork 60 on the lower level are hinged through the rotating shaft 100 and are coaxially provided with a middle roller 62, which is in rolling contact with the middle track beam 31. The lower outer end of the upright scissors fork 60 on the lower level is hinged to the lower mounting seat 21, and the lower inner end is provided with a lower roller 63 and is in rolling contact with the base 20.

[0046] Example 2: Combination Figure 3 As shown, based on the first embodiment, two front and rear lower track beams 22 are provided on the base 20 , and the lower roller 63 is in rolling contact with the lower track beam 22 .

[0047] Combine Figure 4 and Figure 8 As shown, the middle section of the middle track beam 31 is configured as a concave section 31.1, and the middle roller 62 is in rolling contact with the concave section 31.1. A plurality of webs 35 are connected between the two middle track beams 31.

[0048] Combine Figure 9 As shown, a convex ring 64 is provided on one side or both sides of the upper roller 61 , the middle roller 62 and the lower roller 63 .

[0049] Example 3: Combination Figure 3 As shown, based on the first or second embodiment, the rigid chain drive unit 50 is provided with a brake 51 .

[0050] Combine Figure 3 and Figure 5 As shown, there are two rigid chain drive units 50 , which are symmetrically distributed left and right. Universal joints 52 are provided at the front and rear of the rigid chain drive units 50 to synchronously drive the two rigid chains 40 at the front and rear.

[0051] Example 4: Combination Figure 1-2 and Figure 10 As shown, on the basis of Example 1, Example 2 or Example 3, the lifting stage further includes side scissor forks 70, which are located on the left and right sides of the lifting stage, and are four in number, arranged in double rows on the left and right sides and symmetrically on the upper and lower layers. One upper end of the side scissor forks 70 on the upper layer is hinged to the upper mounting seat 13, and the other upper end is provided with a roller and is in rolling contact with the table steel frame 12. The lower end of the side scissor forks 70 on the upper layer and the upper end of the side scissor forks 70 on the lower layer are hinged through a rotating shaft 100. One lower end of the side scissor forks 70 on the lower layer is hinged to the lower mounting seat 21, and the other lower end is provided with a roller and is in rolling contact with the base 20.

[0052] Example 5: Combination Figure 1-2 and Figure 11 As shown, on the basis of Example 1, Example 2 or Example 3, the lifting stage further includes side scissor forks 70, which are located on the left and right sides of the lifting stage, and there are eight groups of them, which are symmetrically arranged in double rows on the left and right, two columns on the front and back, and two layers on the upper and lower levels. The upper outer ends of the side scissor forks 70 on the upper level are hinged to the upper mounting seat 13, and the upper inner ends are provided with rollers and are in rolling contact with the table steel frame 12. The lower ends of the side scissor forks 70 on the upper level and the upper ends of the side scissor forks 70 on the lower level are hinged through the rotating shaft 100, and the lower outer ends of the side scissor forks 70 on the lower level are hinged to the lower mounting seat 21, and the lower inner ends are provided with rollers and are in rolling contact with the base 20.

[0053] Working method: Combined Figure 1 、 Figure 3 and Figure 5As shown, in the initial state, the stage 10 is in a low position, the rigid chain drive unit 50 works to drive the rigid chain 40, the upper end of the rigid chain 40 rises, driving the middle layer steel frame 30 to rise, the upright scissor fork 60 rotates accordingly, the upper roller 61, the middle roller 62 and the lower roller 63 roll to both sides, and the side scissor fork 70 rises synchronously with the upright scissor fork 60 until the stage 10 rises to the set high position, as shown in FIG. Figure 2 and Figure 6 .

[0054] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. The present invention can be used on similar products. Any changes or modifications made by any technician in this field within the scope of the present invention are covered by the patent scope of the present invention.

Claims

1. A large lifting stage composed of a double-section scissor fork and a rigid chain, characterized by: It comprises a stage (10) and a base (20), wherein an intermediate steel frame (30), a rigid chain (40), a rigid chain drive unit (50) and an upright scissor fork (60) are provided between the stage (10) and the base (20); The stage (10) comprises a stage surface (11) and a stage steel frame (12) fixedly connected to the bottom thereof, and upper mounting seats (13) are provided on the left and right sides of the stage steel frame (12); Lower mounting seats (21) are provided on the left and right sides of the base (20); The intermediate layer steel frame (30) includes two middle track beams (31) arranged front and rear, cross beams (32) are respectively arranged between the ends of the middle track beams (31), a middle mounting seat (33) is arranged on the outside of the connection portion between the middle track beams (31) and the cross beams (32), and a connecting plate (34) is arranged at the bottom; The rigid chains (40) are four in number, and their upper ends are fixedly connected to the connecting plates (34) respectively. The rigid chain drive unit (50) is in transmission connection with the rigid chains (40); The upright scissor forks (60) are located in the front and back of the lifting stage, and there are eight groups of them, which are arranged symmetrically in two rows in front and back, two columns in left and right, and two layers in the upper and lower levels. The upper outer ends of the upright scissor forks (60) located in the upper level are hinged to the upper mounting seat (13), and the upper inner ends are provided with upper rollers (61) and are in rolling contact with the table steel frame (12). The lower outer ends of the upright scissor forks (60) located in the upper level and the upper outer ends of the upright scissor forks (60) located in the lower level are connected by a rotating shaft (100 ) is hinged to the middle mounting seat (33), the lower inner end of the upper upright scissors fork (60) and the upper inner end of the lower upright scissors fork (60) are hinged through a rotating shaft (100) and are coaxially provided with a middle roller (62), the middle roller (62) is in rolling contact with the middle track beam (31), the lower outer end of the lower upright scissors fork (60) is hinged to the lower mounting seat (21), the lower inner end is provided with a lower roller (63) and is in rolling contact with the base (20).

2. A large lifting stage composed of a double-section scissor fork and a rigid chain according to claim 1, characterized in that: Two front and rear lower track beams (22) are provided on the base (20), and the lower roller (63) is in rolling contact with the lower track beams (22).

3. The large lifting stage composed of a double-section scissor fork and a rigid chain according to claim 1, characterized in that: The middle section of the middle track beam (31) is configured as a concave section (31.1), and the middle roller (62) is in rolling contact with the concave section (31.1).

4. The large lifting stage composed of a double-section scissor fork and a rigid chain according to claim 1, characterized in that: A plurality of web members (35) are connected between the two middle track beams (31).

5. The large lifting stage composed of a double-section scissor fork and a rigid chain according to claim 1, characterized in that: The rigid chain drive unit (50) is provided with a brake (51).

6. The large lifting stage composed of a double-section scissor fork and a rigid chain according to claim 5, characterized in that: The rigid chain drive units (50) are two in number and are symmetrically distributed left and right. Universal joints (52) are provided at the front and rear of the rigid chain drive units (50) to synchronously drive the two rigid chains (40) at the front and rear.

7. The large lifting stage composed of a double-section scissor fork and a rigid chain according to claim 1, characterized in that: A convex ring (64) is provided on one side or both sides of the upper roller (61), the middle roller (62) and the lower roller (63).

8. A large lifting stage in combination of a double-section scissor fork and a rigid chain according to any one of claims 1 to 7, characterized in that: It also includes side scissor forks (70), which are located on the left and right sides of the lifting stage, and are four in number, arranged in double rows on the left and right sides and symmetrically on the upper and lower layers. One upper end of the side scissor forks (70) on the upper layer is hinged to the upper mounting seat (13), and the other upper end is provided with a roller and is in rolling contact with the table steel frame (12). The lower end of the side scissor forks (70) on the upper layer and the upper end of the side scissor forks (70) on the lower layer are hinged through a rotating shaft (100). One lower end of the side scissor forks (70) on the lower layer is hinged to the lower mounting seat (21), and the other lower end is provided with a roller and is in rolling contact with the base (20).

9. A large lifting stage in combination of a double-section scissor fork and a rigid chain according to any one of claims 1 to 7, characterized in that: It also includes side scissor forks (70), which are located on the left and right sides of the lifting stage, and are eight in number, arranged symmetrically in double rows on the left and right, two columns on the front and back, and two layers on the upper and lower levels. The upper outer ends of the side scissor forks (70) on the upper level are hinged to the upper mounting seat (13), and the upper inner ends are provided with rollers and are in rolling contact with the tabletop steel frame (12). The lower ends of the side scissor forks (70) on the upper level and the upper ends of the side scissor forks (70) on the lower level are hinged through a rotating shaft (100), and the lower outer ends of the side scissor forks (70) on the lower level are hinged to the lower mounting seat (21), and the lower inner ends are provided with rollers and are in rolling contact with the base (20).

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