Platform for maintaining outer side of bridge

Abstract

The utility model discloses a platform for maintaining the outer side of a bridge, relates to the technical field of bridge maintenance equipment, and solves the technical problem that a platform for maintaining the outer side of the bridge in the prior art is inconvenient to use. The platform for maintaining the outer side of the bridge comprises a movable frame. The bearing frame is mounted on the moving frame, the bearing frame and the moving frame are arranged at intervals in the first direction, and the bearing frame is used for bearing maintenance personnel and maintenance tools; and the driving piece is connected between the bearing frame and the movable frame and used for driving the bearing frame to ascend and descend. Therefore, through the cooperation of the moving frame and the driving part, maintenance personnel do not need to return to the bridge deck from the bearing frame to adjust the position of the bearing frame and then go into the bearing frame again, the position of the bearing frame can be moved more conveniently, the construction efficiency is improved, traffic closing is not needed in the maintenance process, citizens can pass more conveniently, and the maintenance cost is reduced. Therefore, the platform for maintaining the outer side of the bridge is more convenient to use and higher in practicability.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge maintenance equipment, and in particular relates to a platform for maintaining the outer side of a bridge. Background Art

[0002] As people's living standards continue to improve, the number of cars is also increasing. Traditional ground transportation can no longer meet people's daily travel needs. Therefore, in recent years, many large and medium-sized cities have vigorously developed the construction of viaducts, which has brought with it an increasingly heavy workload. Viaducts are characterized by their high height. They are generally supported by reinforced concrete frames or single-column or double-column reinforced concrete piers. The bridge body is supported by supports at the upper ends of the piers. The upper part of the viaduct under construction can use the original frame or bridge deck for later bridge deck maintenance. However, the beautification, removal, and installation of various facilities on the outer side walls of the viaduct are very inconvenient. In the prior art, scaffolding, aerial work platforms, cranes and hanging baskets are often used as working platforms. However, the use costs of aerial work platforms and cranes are high, and the traffic under urban viaducts is complicated. Traffic needs to be closed during construction, which can easily cause traffic congestion and affect the passage of citizens. Scaffolding is generally suitable for flat ground. At the same time, it occupies a large area and takes a long time. The hanging basket in the prior art is usually kept relatively fixed to the viaduct guardrail. When maintenance personnel complete the maintenance of a facility, they need to return to the bridge deck once, and need to readjust the position of the hanging basket again and then climb up to the hanging basket to carry out construction. This leads to low work efficiency and prolongs the work period. Utility Model Content

[0003] The utility model provides a bridge outer side maintenance platform, which is used to solve the technical problem that the bridge outer side maintenance platform in the prior art is inconvenient to use.

[0004] The utility model is achieved through the following technical solutions:

[0005] A bridge outer side maintenance platform, comprising:

[0006] Mobile racks;

[0007] a carrying frame, mounted on the mobile frame, and the carrying frame and the mobile frame are spaced apart along a first direction, the carrying frame being used to carry maintenance personnel and maintenance tools;

[0008] A driving member is connected between the carrying frame and the movable frame, and is used to drive the carrying frame to move up and down.

[0009] Furthermore, the driving member includes two hand chain hoists, one end of each of the two hand chain hoists is mounted on the movable frame, and the other end is respectively connected to both ends of the bearing frame.

[0010] Further, it further includes outstretched crossbeams, with two in number. One ends of the two outstretched crossbeams are both installed on the top end of the movable key, and the other ends of the two outstretched crossbeams are both installed on the bearing frame.

[0011] Further, it further includes:

[0012] Connecting arms, with both ends fixedly installed on the two outstretched crossbeams respectively, and one ends of the two chain hoists are respectively installed on both ends of the connecting arms;

[0013] Extension arms, with two in number. One ends of the two extension arms are respectively hinged on the two outstretched crossbeams;

[0014] Cantilever arms, with two in number. The other ends of the two cantilever arms are respectively hinged on the other ends of the two extension arms, and the other ends of the two cantilever arms are hinged on the bearing frame.

[0015] Further, it further includes U-shaped frames, with two in number. The two U-shaped frames are both installed on the top end of the bearing frame, and the other ends of the two chain hoists are respectively connected to the two U-shaped frames.

[0016] Further, the bearing frame includes:

[0017] Base plate;

[0018] First protective rods, with multiple in number. One ends of the multiple first protective rods are all installed on the base plate, and the multiple first protective rods are located at the edge of the base plate;

[0019] Second protective rods, with multiple in number. The multiple second protective rods are respectively installed on any two adjacent first protective rods, and at least one second protective rod is provided between any two adjacent protective rods.

[0020] Further, it further includes protective plates, with multiple in number. The multiple protective plates are sequentially connected end to end to surround the outer side wall of the bearing frame and are located at the lower part of the bearing frame.

[0021] Further, the movable frame includes:

[0022] Movable plate;

[0023] Rollers, with multiple in number, and are all rotatably installed on the movable plate;

[0024] There are four vertical rods, one end of each of the four vertical rods is detachably mounted on the movable plate, and the four vertical rods are located at four vertices of the same rectangle, the other ends of the four vertical rods extend along the second direction, one end of each of the two outwardly extending cross beams is respectively mounted on any two adjacent vertical rods, and the first direction and the second direction are arranged perpendicular to each other;

[0025] There are multiple horizontal rods, and the multiple horizontal rods are respectively installed on any two adjacent vertical rods, and at least one horizontal rod is installed between any two adjacent vertical rods.

[0026] Furthermore, a controller is included, and the controller is used to control the steering and movement of the roller.

[0027] Furthermore, it also includes:

[0028] There are multiple first oblique reinforcing rods, wherein one end of any first oblique reinforcing rod is mounted on any vertical rod, and the other end is mounted on the movable plate, and the two first oblique reinforcing rods between any two adjacent vertical rods are in a V-shape or an X-shape;

[0029] There are two second reinforcing diagonal rods, one end of each of which is respectively mounted on the two outwardly extending cross beams, and the other end is respectively mounted on the two vertical rods connected to the two outwardly extending cross beams.

[0030] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0031] The bridge outer side maintenance platform provided by the present invention includes a movable frame, a load-bearing frame and a driving member. The load-bearing frame is installed on the movable frame, and the load-bearing frame and the movable frame are arranged at intervals along a first direction. The load-bearing frame is used to carry maintenance personnel and maintenance tools. The driving member is connected between the load-bearing frame and the movable frame, and the driving member is used to drive the load-bearing frame to rise and fall.

[0032] The support frame is then driven by the mobile frame to move on the bridge, and the support frame connected to the mobile frame is simultaneously driven to move on the outside of the bridge until the support frame and the point to be repaired are in the same vertical plane. The support frame is then driven up by the driving member to make the position of the support frame higher than the guardrail of the bridge. The maintenance personnel then climb over the guardrail and enter the support frame, and put the maintenance tools into the support frame. The maintenance personnel then drive the support frame down again by the driving member until the maintenance personnel in the support frame are moved to a position convenient for the maintenance of the bridge. The driving mechanism stops driving the supporting frame down, and the maintenance personnel carry out maintenance on that point. When the maintenance personnel have completed the maintenance at that point, they drive the mobile frame to move on the bridge again, and at the same time drive the supporting frame and the maintenance personnel inside the supporting frame to move to the next maintenance point. Then, the maintenance personnel use the driving member to drive the supporting frame up and down again according to the position of the maintenance point, until the maintenance personnel inside the supporting frame are moved to a position convenient for repairing the bridge at the maintenance point, and then stop driving the supporting frame up and down. In this way, through the cooperation of the mobile frame and the driving member, there is no need for the maintenance personnel to return from the supporting frame to the bridge surface to adjust the position of the supporting frame and then get back on the supporting frame, thereby improving the efficiency of construction. In addition, there is no need to close traffic during the maintenance process, which is more convenient for citizens to pass. Therefore, through the arrangement of the mobile frame and the driving member, it is easier to move the position of the supporting frame, so that the bridge outer maintenance platform provided by the utility model is more convenient to use and more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the accompanying drawings:

[0034] Figure 1 A schematic diagram of the structure of a bridge outer side maintenance platform provided by an embodiment of the present utility model;

[0035] Figure 2 Another schematic diagram of the structure of the bridge outer maintenance platform provided by an embodiment of the present utility model;

[0036] Figure 3 This is another structural schematic diagram of the bridge outer side maintenance platform provided in an embodiment of the present utility model.

[0037] Markings and corresponding parts names in the accompanying drawings:

[0038] 1 - Mobile frame, 11 - Mobile plate, 12 - Roller, 13 - Vertical rod, 14 - Horizontal rod, 2 - Carrying frame, 21 - Bottom plate, 22 - First protective rod, 23 - Second protective rod, 3 - Chain block, 4 - Extended cross beam, 5 - Connecting arm, 6 - Extension arm, 7 - Cantilever, 8 - C-shaped frame, 9 - Protective plate, 10 - Controller, 20 - First reinforcing diagonal rod, 30 - Second reinforcing diagonal rod. Detailed implementation mode

[0039] In order to make the purpose, technical solution and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the embodiments and drawings. The illustrative embodiments and descriptions of the present utility model are only used to explain the present utility model and do not limit the present utility model.

[0040] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component.

[0041] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "plural" means two or more unless otherwise specifically defined.

[0043] Embodiment:

[0044] This embodiment provides a platform for bridge outer maintenance, which is used to solve the technical problem that the platform for bridge outer maintenance in the prior art is not convenient to use. The platform for bridge outer maintenance includes a mobile frame 1, a carrying frame 2 and a driving member, where:

[0045] The mobile frame 1 can move on the bridge.

[0046] The carrying frame 2 is installed on the mobile frame 1, and the carrying frame 2 and the mobile frame 1 are arranged at intervals along the first direction, that is, the carrying frame 2 is located on the left or right side of the mobile frame 1. The carrying frame 2 is used to carry maintenance personnel and maintenance tools. In this way, through the setting of the carrying frame 2, it is convenient for maintenance personnel to place the maintenance tools they need.

[0047] The driving member is connected between the supporting frame 2 and the movable frame 1, and the driving member is used to drive the supporting frame 2 to rise and fall. In this way, the setting of the driving member makes it easier to drive the supporting frame 2 to move, thereby making it easier for maintenance personnel to repair maintenance points at different heights on the outside of the bridge. Through the above structure, when using the bridge outside maintenance platform provided by the utility model, the supporting frame 2 is first placed on the outside of the bridge, that is, the guardrail of the bridge is located between the supporting frame 2 and the movable frame 1, and then the movable frame 1 is driven to move on the bridge, while driving the supporting frame 2 connected to the movable frame 1 to move synchronously on the outside of the bridge until the supporting frame 2 and the point to be repaired are in the same vertical plane, and then the supporting frame 2 is driven to rise by the driving member so that the position of the supporting frame 2 is higher than the guardrail of the bridge. The maintenance personnel then climb over the guardrail to enter the supporting frame 2 and put the maintenance tools into the supporting frame 2. Then the maintenance personnel drive the supporting frame 2 down again by the driving member until the maintenance personnel in the supporting frame 2 are moved to a position convenient for repairing the bridge to be repaired. , the driving of the supporting frame 2 to descend is stopped, and the maintenance personnel carry out maintenance on that point; when the maintenance personnel have completed the maintenance at that point, they drive the mobile frame 1 to move on the bridge again, and at the same time drive the supporting frame 2 and the maintenance personnel in the supporting frame 2 to move to the next point to be maintained. Then, the maintenance personnel drive the supporting frame 2 up and down again through the driving member according to the position of the point to be maintained, until the maintenance personnel in the supporting frame 2 are moved to a position convenient for maintenance of the bridge to be maintained, and then stop driving the supporting frame 2 up and down. In this way, through the cooperation of the mobile frame 1 and the driving member, there is no need for the maintenance personnel to return from the supporting frame 2 to the bridge surface to adjust the position of the supporting frame 2 and then get back on the supporting frame 2, thereby improving the efficiency of construction, and there is no need to close traffic during the maintenance process, which is more convenient for citizens to pass. Therefore, through the setting of the mobile frame 1 and the driving member, it is easier to move the position of the supporting frame 2, so that the bridge outer maintenance platform provided by the utility model is more convenient to use and more practical.

[0048] An optional implementation of this embodiment is as follows: the driving member includes two hand hoists 3, one end of the two hand hoists 3 is installed on the mobile frame 1, and the other ends are respectively connected to the two ends of the supporting frame 2, and the two hand hoists 3 are symmetrically arranged. In this way, the two ends of the supporting frame 2 are connected to the mobile frame 1 through the two hand hoists 3, which not only reduces the chance of the supporting frame 2 shaking, but also makes it easier for the supporting frame 2 to maintain balance.

[0049] An optional implementation of this embodiment is as follows: it also includes two outward-extending beams 4, one end of each of the two outward-extending beams 4 is installed on the top of the mobile frame 1, and the other ends of each of the two outward-extending beams 4 is installed on the supporting frame 2, that is, the other ends of the two outward-extending beams 4 extend along the first direction. In this way, through the setting of the outward-extending beams 4, the supporting frame 2 and the mobile frame 1 are spaced apart, which makes it easier to place the supporting frame 2 on the outside of the bridge.

[0050] An optional implementation of this embodiment is as follows: it further includes a connecting arm 5, an extension arm 6 and a cantilever 7, wherein:

[0051] The two ends of the connecting arm 5 are fixedly mounted on the two outrigger beams 4, and one end of the two hand hoists 3 are respectively mounted on the two ends of the connecting arm 5. In this way, the two outrigger beams 4 are connected together through the setting of the connecting arm 5, making the structure more solid.

[0052] There are two extension arms 6, one end of the two extension arms 6 is respectively hinged on the two outwardly extending beams 4, and the other ends of the two extension arms 6 extend in directions away from each other. Optionally, the extension arms 6 include a rectangular frame and a plurality of short rods, the two ends of the plurality of short rods are respectively fixedly mounted on the two opposite inner walls of the rectangular frame, and the plurality of short rods are evenly spaced along the length direction of the rectangular frame.

[0053] There are two cantilevers 7 , and the other ends of the two cantilevers 7 are hinged to the other ends of the two extension arms 6 respectively, and the other ends of the two cantilevers 7 are hinged to the carrying frame 2 .

[0054] Through the above structure, when it is necessary to drive the carrying frame 2 to rise, the carrying frame 2 is driven to rise by the hand hoist 3, the carrying frame 2 rises, and the cantilever 7 rotates relative to the carrying frame 2, so that the angle between the cantilever 7 and the carrying frame 2 is reduced. At the same time, the cantilever 7 drives the extension arm 6 to rotate synchronously, so that the angle between the extension arm 6 and the connecting arm 5 gradually increases, until the extension arm 6 and the connecting arm 5 are located on the same horizontal plane, that is, the angle between the extension arm 6 and the connecting arm 5 is 180°, and the carrying frame 2 rises to the highest point; when it is necessary to drive the carrying frame 2 to descend, the carrying frame 2 is driven to descend again by the hand hoist 3, the carrying frame 2 descends, and the cantilever 7 rotates relative to the carrying frame 2, so that the angle between the cantilever 7 and the carrying frame 2 gradually increases. At the same time, the cantilever 7 drives the extension arm 6 to rotate synchronously, so that the angle between the extension arm 6 and the connecting arm 5 gradually decreases. In this way, through the arrangement of the hinged extension arm 6 and the cantilever 7, the probability of the carrying frame 2 shaking during the lifting process is further reduced, thereby improving the safety of the bridge outer maintenance platform provided by the embodiment of the utility model.

[0055] Optionally, it further includes two U-shaped frames 8, both of which are installed at the top end of the bearing frame 2. The other ends of the two chain hoists 3 are respectively connected to the two U-shaped frames 8. Specifically, the U-shaped frame 8 is composed of a top plate and two side plates. One ends of the two side plates are respectively installed at both ends of the top plate, and the other ends of the two side plates are both installed at the top end of the bearing frame 2. A round hole is formed in the side wall of the top plate, and the round hole is located at the center of the top plate. The side plate is hung on the hook of the chain hoist 3 through the round hole. In this way, through the setting of the U-shaped frame 8, it is more convenient to connect the chain hoist 3 with the bearing frame 2.

[0056] An optional implementation manner of this embodiment is as follows: The bearing frame 2 includes a bottom plate 21, a first protective rod 22, and a second protective rod 23, where:

[0057] The bottom plate 21 is a rectangular plate body. In this way, through the setting of the bottom plate 21, the probability that maintenance tools or parts fall out of the bearing frame 2 is reduced.

[0058] The number of the first protective rods 22 is multiple. One ends of the multiple first protective rods 22 are all installed on the bottom plate 21, and the other ends of the multiple first protective rods 22 extend upward. Moreover, the multiple first protective rods 22 are located at the outer edge of the bottom plate 21. In this way, through the setting of the multiple first protective rods 22, it is avoided that maintenance personnel step out of the bottom plate 21.

[0059] The number of the second protective rods 23 is multiple. The multiple second protective rods 23 are respectively installed on any two adjacent first protective rods 22, and at least one second protective rod 23 is provided between any two adjacent second protective rods 23. In this way, through the multiple second protective rods 23 connecting the multiple first protective rods 22 together, the safety of the bearing frame 2 is further increased.

[0060] Optionally, it further includes multiple protective plates 9. The multiple protective plates 9 are sequentially connected end to end to surround the outer side wall of the bearing frame 2 and are located at the lower part of the bearing frame 2. In this way, through the setting of the protective plates 9, the probability that maintenance tools and parts fall out of the bearing frame 2 is further reduced.

[0061] An optional implementation manner of this embodiment is as follows: The moving frame 1 includes a moving plate 11, rollers 12, vertical rods 13, and horizontal rods 14, where:

[0062] A counterweight is provided on the moving plate 11. In this way, through the setting of the counterweight, the moving frame 1 is prevented from tipping over.

[0063] The number of the rollers 12 is multiple, and they are all rotatably installed on the moving plate 11. In this way, through the setting of the rollers 12, it is more convenient to drive the moving plate 11 to move.

[0064] There are four vertical rods 13, and one end of the four vertical rods 13 can be detachably mounted on the movable plate 11. Optionally, the four vertical rods 13 are mounted on the movable plate 11 through flanges, and the four vertical rods 13 are located at the four vertices of the same rectangle. The other ends of the four vertical rods 13 extend along the second direction, and one end of the two outwardly extending beams 4 is respectively mounted on any two adjacent vertical rods 13, and the first direction and the second direction are arranged perpendicular to each other.

[0065] There are multiple horizontal rods 14, and multiple horizontal rods 14 are respectively installed on any two adjacent vertical rods 13, and at least one horizontal rod 14 is installed between any two adjacent vertical rods 13. In this way, through the setting of the horizontal rods 14, the vertical rods 13 can be more firmly installed on the movable plate 11.

[0066] Optionally, a controller 10 is also included, which is used to control the steering and movement of the roller 12. The controller 10 is a prior art and will not be described in detail. In this way, through the setting of the controller 10, it is easier to drive the roller 12 to move the moving plate 11 and turn.

[0067] An optional implementation of this embodiment is as follows: it further includes a first reinforcing diagonal rod 20 and a second reinforcing diagonal rod 30:

[0068] There are multiple first reinforcing diagonal bars 20, wherein one end of any first reinforcing diagonal bar 20 is mounted on any vertical bar 13, and the other end is mounted on the movable plate 11, and the two first reinforcing diagonal bars 20 between any two adjacent vertical bars 13 are V-shaped or X-shaped. In this way, the arrangement of the first reinforcing diagonal bars 20 further strengthens the connection between the vertical bars 13 and the movable plate 11, and reduces the probability of bending of the vertical bars 13;

[0069] There are two second reinforcing diagonal rods 30. One end of the two second reinforcing diagonal rods 30 is respectively installed on the two outward-extending beams 4, and the other end is respectively installed on the two vertical rods 13 connected to the two outward-extending beams 4. In this way, the probability of bending of the outward-extending beams 4 is reduced by the setting of the second reinforcing diagonal rods 30.

[0070] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific implementation method of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A bridge outer side maintenance platform, characterized in that: Comprising: A moving frame (1); a carrying frame (2), mounted on the moving frame (1), and the carrying frame (2) and the moving frame (1) are arranged at intervals in a first direction, and the carrying frame (2) is used to carry maintenance personnel and maintenance tools; a driving member, connected between the carrying frame (2) and the moving frame (1), and the driving member is used to drive the carrying frame (2) to lift and lower. The driving member includes a chain block (3), and the number is two. One ends of the two chain blocks (3) are both mounted on the moving frame (1), and the other ends are respectively connected to both ends of the carrying frame (2). It further includes two outrigger beams (4). One ends of the two outrigger beams (4) are both mounted on the top end of the moving frame (1), and the other ends of the two outrigger beams (4) are both mounted on the carrying frame (2). It further includes: a connecting arm (5), with both ends fixedly mounted on the two outrigger beams (4) respectively, and one ends of the two chain blocks (3) are respectively mounted on both ends of the connecting arm (5); two extension arms (6), one ends of the two extension arms (6) are respectively hinged on the two outrigger beams (4); two cantilever beams (7), the other ends of the two cantilever beams (7) are respectively hinged on the other ends of the two extension arms (6), and the other ends of the two cantilever beams (7) are hinged on the carrying frame (2).

2. A bridge exterior maintenance platform according to claim 1, characterized in that: It further includes two U-shaped frames (8), and the two U-shaped frames (8) are both mounted on the top end of the carrying frame (2), and the other ends of the two chain blocks (3) are respectively connected to the two U-shaped frames (8).

3. A bridge exterior maintenance platform according to claim 1, characterized in that: The carrying frame (2) includes: a bottom plate (21); a plurality of first protective rods (22), one ends of the plurality of first protective rods (22) are all mounted on the bottom plate (21), and the plurality of first protective rods (22) are located at the outer edge of the bottom plate (21); a plurality of second protective rods (23), the plurality of second protective rods (23) are respectively mounted on any two adjacent first protective rods (22), and at least one second protective rod (23) is provided between any two adjacent second protective rods (23).

4. A bridge exterior maintenance platform according to claim 3, characterized in that: It further includes a plurality of protective plates (9), and the plurality of protective plates (9) are sequentially connected end to end to surround the outer side wall of the carrying frame (2) and are located at the lower part of the carrying frame (2).

5. The bridge exterior maintenance platform according to claim 1, characterized in that: The movable frame (1) comprises: a movable plate (11); a plurality of rollers (12), all rotatably mounted on the movable plate (11); four vertical rods (13), one end of each of the four vertical rods (13) can be detachably mounted on the movable plate (11), and the four vertical rods (13) are all located at four vertices of the same rectangle, the other ends of the four vertical rods (13) extend along a second direction, one end of the two outwardly extending beams (4) are respectively mounted on any two adjacent vertical rods (13), and the first direction and the second direction are arranged perpendicular to each other; and a plurality of horizontal rods (14), the plurality of horizontal rods (14) are respectively mounted on any two adjacent vertical rods (13), and at least one horizontal rod (14) is mounted between any two adjacent vertical rods (13).

6. A bridge exterior maintenance platform according to claim 5, characterized in that: It also includes a controller (10), which is used to control the steering and movement of the roller (12).

7. A bridge exterior maintenance platform according to claim 6, characterized in that: Also includes: There are a plurality of first reinforcing diagonal rods (20), wherein one end of any one of the first reinforcing diagonal rods (20) is mounted on any one of the vertical rods (13), and the other end is mounted on the movable plate (11), and the two first reinforcing diagonal rods (20) between any two adjacent vertical rods (13) are in a V-shape or an X-shape; there are two second reinforcing diagonal rods (30), wherein one end of the two second reinforcing diagonal rods (30) is respectively mounted on the two outwardly extending cross beams (4), and the other end is respectively mounted on the two vertical rods (13) connected to the two outwardly extending cross beams (4).

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