A translational pier safety platform

By introducing pressure sensors and hydraulic rod systems into the pier working platform, combined with steering drive components and crane components, the problem of unstable platform movement was solved, achieving stable movement and efficient transportation, thus improving construction safety and efficiency.

CN116591047BActive Publication Date: 2026-07-17YUNNAN YULIN FORMWORK MFG CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
YUNNAN YULIN FORMWORK MFG CO LTD
Filing Date
2023-05-15
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The existing pier operation platform is difficult to maintain balance when moving and is prone to tipping over.

Method used

The system employs a translational pier safety platform. Through pressure sensors and hydraulic rod systems in the moving components, it monitors and adjusts the contact and support force between the wheels and the ground in real time, achieving stable movement in conjunction with the steering drive components. The crane components are used for transporting materials at heights, and the elevator and transport components work together.

Benefits of technology

It enables stable movement and efficient transportation of materials or personnel on the piers, preventing equipment from tipping over and improving the safety and efficiency of construction.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention relates to the field of construction auxiliary equipment technology and discloses a translational pier safety platform, including a base plate. A reinforcing plate is fixedly mounted on the bottom of the base plate, and a moving component is fixedly mounted on the bottom of the reinforcing plate. A crane component is fixedly mounted on the top of the reinforcing plate, and a transport component is provided on the top of the base plate. A hydraulic rod is provided, allowing the equipment to rotate and change the support distance between the fixed platform and the drive body. This changes the contact between the wheels at the bottom of the drive body and the ground. Through arc grooves and spheres, the fixed platform and the drive body can rotate in the direction of the hydraulic rod. This allows the moving components to offset according to the shape of the ground during movement, resulting in better contact between the moving components and the ground, while maintaining stable support between the equipment and the ground, thus preventing the equipment from tipping over during movement.
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Description

Technical Field

[0001] This invention relates to the field of construction auxiliary equipment technology, specifically a translational pier safety platform. Background Technology

[0002] Piers are the load-bearing structures in civil engineering that support the superstructure. Piers are mostly circular in cross-section, but there are also irregular shapes such as elliptical, square, curved, and parabolic piers. They are an important component in highway bridges, railway bridges, pedestrian bridges, overpasses, ramp bridges, and pedestrian bridges.

[0003] For existing pier construction platforms, refer to Chinese Utility Model Patent No. CN217782780U, which discloses a high pier construction platform that includes a base, a work platform, a toolbox, a canopy assembly, and a connecting assembly. The base and work platform are both square structures, identical in size, and aligned with each other. Electro-hydraulic push rods are installed at the four corners of the base, with their tops connected to the work platform. Multiple vertical poles are installed on the upper surface of the work platform, with baffles between adjacent poles. Support rods are installed on the upper part of the poles, with their tops connected to the canopy assembly. The bottom ends of the electro-hydraulic push rods are connected to the base via the connecting assembly. The inner side of the enclosure panel is provided with a sliding groove, and the toolbox is installed in the groove via a slider. Through the arrangement of the electric hydraulic push rod, enclosure panel, toolbox, and canopy assembly, during use, personnel climb onto the work platform via a ladder. The electric hydraulic push rod can then be used to raise the work platform according to the work requirements, facilitating repair operations. Tools are stored in the toolbox and do not need to be carried; personnel can simply slide it according to their position. During work, the canopy can shield workers from falling debris, ensuring their safety. Furthermore, in summer, fans can be used to cool workers, largely preventing heatstroke.

[0004] The aforementioned equipment can be moved by setting pulleys, but by only setting pulleys, it is difficult to maintain balance when moving, which leads to the equipment tipping over. Therefore, a translational pier safety platform is proposed. Summary of the Invention

[0005] This invention provides a translational pier safety platform, which solves the problems mentioned in the background art.

[0006] This invention provides the following technical solution: a sliding pier safety platform, comprising a base plate, a reinforcing plate fixedly mounted at the bottom of the base plate, a moving component fixedly mounted at the bottom of the reinforcing plate, a crane component fixedly mounted at the top of the reinforcing plate, a transport component provided at the top of the base plate, support groups fixedly mounted on both sides of the top of the base plate, a top plate fixedly mounted on the top of the support groups, an outer wall handrail fixedly mounted on the outer edge of the top of the top plate, a lift fixedly mounted at the bottom of the top plate, a main pulley rotatably connected to the bottom of the lift, a supporting steel frame fixedly mounted on the top of the base plate, a stepped staircase fixedly mounted on the outer edge of the supporting steel frame, an outer guardrail fixedly mounted on the outer edge of the top of the stepped staircase, a climbing frame one fixedly mounted on the outer edge of the support groups, an arc-shaped guardrail fixedly mounted on the outer edge of the climbing frame one, a standing platform fixedly mounted on the top of the climbing frame one, a climbing frame two fixedly mounted on the top of the standing platform, and a circular groove opened at the top of the top plate.

[0007] Preferably, there are three sets of supporting steel frames, and all three sets of supporting steel frames are set on the outer edge of the staircase. The bottom and top of the staircase are connected to the bottom plate and the top plate, respectively. The outer guardrail is connected to the outer wall handrail. The top of the climbing frame corresponds to the position of the circular groove.

[0008] Preferably, the moving component includes a driving body, a supporting body is fixedly mounted on the top of the driving body, a steering drive component is fixedly mounted on the top of the supporting body, a hydraulic rod is rotatably connected to the top outer edge of the steering drive component, a pressure sensor is embedded in the inner cavity of the hydraulic rod, an arc groove is formed on the top of the steering drive component, a sphere is embedded in the inner wall of the arc groove, and a fixed platform is fixedly mounted on the top of the sphere.

[0009] Preferably, wheels are provided on the inner walls of both sides of the drive body, and pressure sensors are provided on the outer edges of the wheels. The reinforcing plate and the moving component are fixedly assembled through a fixed platform. There are several hydraulic rods, and the hydraulic rods are arranged in a ring around the outer edge of the steering drive component. The fixed platform and the outer edge of the steering drive component are rotatably connected through the hydraulic rods.

[0010] Preferably, the crane assembly includes a fixed panel, a steering assembly fixedly mounted on the top of the fixed panel, a fixed block fixedly mounted on the top of the steering assembly, a support block provided on the top of the fixed block, a hydraulic drive rod rotatably connected to the outer edges of both the fixed block and the support block, an auxiliary support frame rotatably connected to the side of the hydraulic drive rod away from the support block, an auxiliary push rod rotatably connected to the bottom of the hydraulic drive rod, a support arm rotatably connected to the inner wall of the auxiliary support frame, a connecting seat slidably connected to the inner wall of the end of the support arm away from the support block, an angle adjusting arm one and an angle adjusting arm two fixedly mounted on the outer wall of the connecting seat away from the support block, a connecting plate rotatably connected to the outer wall of the angle adjusting arm one, and an operating chamber fixedly mounted on the outer wall of the connecting plate.

[0011] Preferably, the inner cavity of the support arm and the connecting seat is provided with a push rod, the outer walls on both sides of the fixed block and the support block are provided with a shell, the crane assembly and the reinforcing plate are fixedly assembled through a fixed panel, and the connecting seat and the connecting plate are connected through angle adjusting arm one and angle adjusting arm two.

[0012] Preferably, the transport component includes a partition, a reinforcing rib is fixedly mounted on the outer edge of the partition, a pulley housing is fixedly mounted on both outer walls of the partition, a pulley body is rotatably connected to the top inner wall of the pulley housing, a side door is rotatably connected to the outer wall of the partition near the standing platform, a latch is slidably fitted on the outer wall of the side door, and the side door and the partition are fixed by the latch.

[0013] Preferably, a steel wire rope is sleeved on the outer edge of the pulley body, and the other end of the steel wire rope is sleeved on the outer edge of the main pulley. The elevator is mechanically driven by the main pulley, and a drive assembly is provided on the inner wall of the elevator.

[0014] The present invention has the following beneficial effects:

[0015] 1. This sliding pier safety platform moves the equipment via movable components. During movement or stationary operation, a pressure sensor allows for real-time monitoring of the pressure borne by several wheels within the movable components. This pressure data allows for the detection of excessive or insufficient pressure on the movable components. Hydraulic rods allow the equipment to rotate, altering the support distance between the fixed platform and the drive unit, thus changing the contact between the wheels at the bottom of the drive unit and the ground. Arc grooves and spheres enable rotation between the fixed platform and the drive unit in the direction of the hydraulic rods. This allows the movable components to shift according to the ground shape during movement, resulting in better contact with the ground and stable support between the equipment and the ground, thus preventing tipping during movement.

[0016] 2. This translational pier safety platform is equipped with several moving components. The steering drive component drives the main body to rotate, so that all the moving components can rotate. Thus, when the equipment moves and turns, several moving components can be adjusted simultaneously to achieve small-angle turning.

[0017] 3. This sliding pier safety platform uses a crane assembly to quickly transport materials or personnel to higher locations. During operation, the crane assembly allows for construction at different heights on the pier. The elevator can move the transport assembly via steel wire ropes, enabling the transport assembly to carry personnel or materials. The crane assembly and transport assembly work together to facilitate their operation. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the base plate structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the circular groove structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the reinforcing plate structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the crane assembly structure of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the mobile component of the present invention;

[0024] Figure 7 This is a schematic diagram of the transport component structure of the present invention;

[0025] In the diagram: 1. Base plate; 2. Reinforcing plate; 3. Moving assembly; 301. Drive body; 302. Support body; 303. Steering drive assembly; 304. Arc groove; 305. Hydraulic rod; 306. Sphere; 307. Fixed platform; 308. Wheel; 309. Pressure sensor one; 310. Pressure sensor two; 4. Crane assembly; 401. Fixed panel; 402. Steering assembly; 403. Fixed block; 404. Support block; 405. Hydraulic drive rod; 406. Auxiliary support frame; 407. Auxiliary push rod; 408. Outrigger; 409. Connecting seat; 410. Angle adjusting arm one; 411. Angle adjusting arm two; 412. Connecting plate; 413. Operating compartment; 5. Transport component; 501. Partition; 502. Side door; 503. Lock; 504. Pulley housing; 505. Pulley body; 506. Reinforcing rib; 6. Support assembly; 7. Top plate; 8. External wall handrail; 9. Elevator; 10. Main pulley; 11. Support steel frame; 12. Staircase; 13. External guardrail; 14. Climbing frame one; 15. Curved guardrail; 16. Climbing frame two; 17. Standing platform; 18. Circular trough. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1-7 A sliding pier safety platform includes a base plate 1, a reinforcing plate 2 fixedly mounted on the bottom of the base plate 1, a moving component 3 fixedly mounted on the bottom of the reinforcing plate 2, a crane component 4 fixedly mounted on the top of the reinforcing plate 2, a transport component 5 mounted on the top of the base plate 1, support assemblies 6 fixedly mounted on both sides of the top of the base plate 1, a top plate 7 fixedly mounted on the top of the support assemblies 6, an outer wall handrail 8 fixedly mounted on the outer edge of the top of the top plate 7, and a lift 9 fixedly mounted on the bottom of the top plate 7. The main pulley 10 is rotatably connected. A supporting steel frame 11 is fixedly installed on the top of the base plate 1. A staircase 12 is fixedly installed on the outer edge of the supporting steel frame 11. An outer guardrail 13 is fixedly installed on the top outer edge of the staircase 12. A climbing frame 14 is fixedly installed on the outer edge of the support group 6. An arc-shaped guardrail 15 is fixedly installed on the outer edge of the climbing frame 14. A standing platform 17 is fixedly installed on the top of the climbing frame 14. A climbing frame 2 16 is fixedly installed on the top of the standing platform 17. A circular groove 18 is opened on the top of the top plate 7.

[0028] There are three sets of supporting steel frames 11, and all three sets of supporting steel frames 11 are set on the outer edge of the staircase 12. The bottom and top of the staircase 12 are connected to the bottom plate 1 and the top plate 7 respectively. The outer guardrail 13 is connected to the outer wall handrail 8. The top of the climbing frame 14 corresponds to the position of the circular groove 18.

[0029] It should be noted that by setting up three sets of supporting steel frames 11, the staircase 12 and the outer guardrail 13 are supported, thereby ensuring that the staircase 12 can maintain its rigidity when the equipment is in use.

[0030] The moving component 3 includes a driving body 301, a supporting body 302 fixedly mounted on the top of the driving body 301, a steering drive component 303 fixedly mounted on the top of the supporting body 302, a hydraulic rod 305 rotatably connected to the top outer edge of the steering drive component 303, a pressure sensor 310 embedded in the inner cavity of the hydraulic rod 305, an arc groove 304 opened on the top of the steering drive component 303, a sphere 306 embedded in the inner wall of the arc groove 304, and a fixed platform 307 fixedly mounted on the top of the sphere 306.

[0031] It should be noted that the circular groove 304 and the sphere 306 enable the fixed platform 307 and the drive body 301 to rotate in the direction of the hydraulic rod 305. This allows the moving components 3 to be offset according to the shape of the ground when the equipment moves, thus enabling the moving components 3 to better fit with the ground and keeping the supporting force between the equipment and the ground stable, thereby preventing the equipment from tipping over when it moves.

[0032] The drive body 301 has wheels 308 on both inner walls, and pressure sensors 309 are installed on the outer edge of the wheels 308. The reinforcing plate 2 and the moving component 3 are fixedly assembled through the fixed platform 307. There are several hydraulic rods 305, and the hydraulic rods 305 are arranged in a ring around the outer edge of the steering drive component 303. The fixed platform 307 and the outer edge of the steering drive component 303 are rotatably connected through the hydraulic rods 305.

[0033] It should be noted that by setting wheels 308, the moving component 3 can move by driving the wheels 308 through the drive body 301. By setting pressure sensor 309, the device can monitor the pressure borne by the wheels 308 in the moving components 3 in real time. Through the pressure data, it can be monitored whether the pressure borne by the moving components 3 is too high or too low. By setting hydraulic rod 305, the device can be operated through hydraulic rod 305 when moving or stationary, so as to change the support distance between the fixed platform 307 and the drive body 301, thereby changing the contact degree between the wheels 308 set at the bottom of the drive body 301 and the ground.

[0034] For example, when the pressure between a wheel 308 and the ground is different from the pressure on the other moving components 3 as detected by the pressure sensor 309, the device controls the hydraulic rod 305 to tilt the fixed platform 307 and the drive body 301, thereby changing the contact between the wheel 308 and the ground, and thus changing the pressure.

[0035] The crane assembly 4 includes a fixed panel 401, a steering assembly 402 fixedly mounted on the top of the fixed panel 401, a fixed block 403 fixedly mounted on the top of the steering assembly 402, a support block 404 on the top of the fixed block 403, a hydraulic drive rod 405 rotatably connected to the outer edges of both the fixed block 403 and the support block 404, an auxiliary support frame 406 rotatably connected to the side of the hydraulic drive rod 405 away from the support block 404, an auxiliary push rod 407 rotatably connected to the bottom of the hydraulic drive rod 405, a support arm 408 rotatably connected to the inner wall of the auxiliary support frame 406, a connecting seat 409 slidably connected to the inner wall of the end of the support arm 408 away from the support block 404, an angle adjusting arm 1 410 and an angle adjusting arm 2 411 fixedly mounted on the outer wall of the connecting seat 409 away from the support block 404, a connecting plate 412 rotatably connected to the outer wall of the angle adjusting arm 1 410, and an operating chamber 413 fixedly mounted on the outer wall of the connecting plate 412.

[0036] It should be noted that, with the above setup, materials or personnel can be quickly transported to higher places via the crane assembly 4 during equipment use, and construction can be carried out at different heights of the pier via the crane assembly 4.

[0037] The inner cavity of the boom 408 and the connecting seat 409 is provided with a push rod, the outer walls of the fixed block 403 and the support block 404 are provided with outer shells, the crane assembly 4 and the reinforcing plate 2 are fixedly assembled through the fixed panel 401, and the connecting seat 409 and the connecting plate 412 are connected through the angle adjusting arm 1 410 and the angle adjusting arm 2 411.

[0038] It should be noted that the boom 408 and the connecting seat 409 are equipped with push rods, which enable the boom 408 and the connecting seat 409 to be further extended and retracted, thereby allowing the crane assembly 4 to be adjusted in multiple lengths.

[0039] The transport component 5 includes a partition 501, with reinforcing ribs 506 fixedly mounted on the outer edge of the partition 501. Pulley housings 504 are fixedly mounted on both outer walls of the partition 501. A pulley body 505 is rotatably connected to the top inner wall of the pulley housing 504. A side door 502 is rotatably connected to the outer wall of the partition 501 near the standing platform 17. A latch 503 is slidably sleeved on the outer wall of the side door 502. The side door 502 and the partition 501 are fixed by the latch 503.

[0040] It should be noted that the rigidity of the transport component 5 is increased by setting the reinforcing rib 506.

[0041] Among them, a steel wire rope is sleeved on the outer edge of the pulley body 505, and the other end of the steel wire rope is sleeved on the outer edge of the main pulley 10. The elevator 9 is mechanically driven by the main pulley 10, and a drive component is installed on the inner wall of the elevator 9.

[0042] It should be noted that, using the above structure, the elevator 9 can drive the transport component 5 to move via a steel wire rope, thereby enabling the transport component 5 to carry personnel or materials for transport. Furthermore, by setting up the crane component 4 and the transport component 5, the two can cooperate with each other.

[0043] Working principle: When using this device, the moving components 3 drive the device to move. Whether moving or stationary, pressure sensors 309 allow the device to monitor in real time the pressure borne by the wheels 308 within the moving components 3. This pressure data allows for monitoring whether the pressure borne by the moving components 3 is too high or too low. Hydraulic rods 305 allow the device to rotate, changing the support distance between the fixed platform 307 and the drive body 301, thereby altering the contact between the wheels 308 at the bottom of the drive body 301 and the ground. The arc groove 304 and the sphere 306 further enhance the connection between the fixed platform 307 and the drive body 301. The hydraulic rod 305 can rotate between the components 1, allowing the equipment to move. Several moving components 3 can be offset according to the shape of the ground, allowing them to better fit with the ground and maintain stable support between the equipment and the ground. This prevents tipping during equipment movement. The crane component 4 quickly transports materials or personnel to higher ground, enabling the equipment to be used at different heights on the pier for construction. The elevator 9 can move the transport component 5 via a steel wire rope, allowing it to carry personnel or materials. The crane component 4 and transport component 5 work together.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A translational pier safety platform, comprising a base plate (1), characterized in that: A reinforcing plate (2) is fixedly mounted on the bottom of the base plate (1). A moving component (3) is fixedly mounted on the bottom of the reinforcing plate (2). A crane component (4) is fixedly mounted on the top of the reinforcing plate (2). A transport component (5) is provided on the top of the base plate (1). Support groups (6) are fixedly mounted on both sides of the top of the base plate (1). A top plate (7) is fixedly mounted on the top of the support groups (6). An outer wall handrail (8) is fixedly mounted on the outer edge of the top of the top plate (7). A lift (9) is fixedly mounted on the bottom of the top plate (7). A main pulley is rotatably connected to the bottom of the lift (9). (10) A supporting steel frame (11) is fixedly installed on the top of the base plate (1), a staircase (12) is fixedly installed on the outer edge of the supporting steel frame (11), an outer guardrail (13) is fixedly installed on the top outer edge of the staircase (12), a climbing frame one (14) is fixedly installed on the outer edge of the support group (6), an arc-shaped guardrail (15) is fixedly installed on the outer edge of the climbing frame one (14), a standing platform (17) is fixedly installed on the top of the climbing frame one (14), a climbing frame two (16) is fixedly installed on the top of the standing platform (17), and a circular groove (18) is opened on the top of the top plate (7). The moving component (3) includes a driving body (301), a supporting body (302) is fixedly mounted on the top of the driving body (301), a steering drive component (303) is fixedly mounted on the top of the supporting body (302), a hydraulic rod (305) is rotatably connected to the outer edge of the top of the steering drive component (303), a pressure sensor (310) is embedded in the inner cavity of the hydraulic rod (305), an arc groove (304) is opened on the top of the steering drive component (303), a sphere (306) is embedded in the inner wall of the arc groove (304), and a fixed platform (307) is fixedly mounted on the top of the sphere (306). The transport component (5) includes a partition (501), a reinforcing rib (506) is fixedly mounted on the outer edge of the partition (501), a pulley housing (504) is fixedly mounted on both outer walls of the partition (501), a pulley body (505) is rotatably connected to the top inner wall of the pulley housing (504), a side door (502) is rotatably connected to the outer wall of the partition (501) near the standing platform (17), a latch (503) is slidably sleeved on the outer wall of the side door (502), and the side door (502) and the partition (501) are fixed by the latch (503); The inner walls on both sides of the drive body (301) are provided with wheels (308), and pressure sensors (309) are provided on the outer edge of the wheels (308). The reinforcing plate (2) and the moving component (3) are fixedly assembled through the fixed platform (307). There are several hydraulic rods (305), and the hydraulic rods (305) are arranged in a ring on the outer edge of the steering drive component (303). The fixed platform (307) and the outer edge of the steering drive component (303) are rotatably connected through the hydraulic rods (305).

2. The translational pier safety platform according to claim 1, characterized in that: The number of the supporting steel frames (11) is three sets, and all three sets of supporting steel frames (11) are set on the outer edge of the staircase (12). The bottom and top of the staircase (12) are connected to the bottom plate (1) and the top plate (7) respectively. The outer guardrail (13) is connected to the outer wall handrail (8). The top of the climbing frame (14) corresponds to the position of the circular groove (18).

3. The translational pier safety platform according to claim 1, characterized in that: The crane assembly (4) includes a fixed panel (401), a steering assembly (402) is fixedly mounted on the top of the fixed panel (401), a fixed block (403) is fixedly mounted on the top of the steering assembly (402), a support block (404) is provided on the top of the fixed block (403), and a hydraulic drive rod (405) is rotatably connected to the outer edges of both the fixed block (403) and the support block (404). An auxiliary support frame (406) is rotatably connected to the side of the hydraulic drive rod (405) away from the support block (404). An auxiliary push rod (407) is rotatably connected to the bottom of the auxiliary support frame (406). A support arm (408) is rotatably connected to the inner wall of the auxiliary support frame (406). A connecting seat (409) is slidably connected to the inner wall of the end of the support arm (408) away from the support block (404). An angle adjusting arm one (410) and an angle adjusting arm two (411) are fixedly assembled on the outer wall of the connecting seat (409) away from the support block (404). A connecting plate (412) is rotatably connected to the outer wall of the angle adjusting arm one (410). An operating chamber (413) is fixedly assembled on the outer wall of the connecting plate (412).

4. The translational pier safety platform according to claim 3, characterized in that: The inner cavity of the support arm (408) and the connecting seat (409) is provided with a push rod. The outer walls on both sides of the fixed block (403) and the support block (404) are provided with a shell. The crane assembly (4) and the reinforcing plate (2) are fixedly assembled through the fixed panel (401). The connecting seat (409) and the connecting plate (412) are connected through the angle adjustment arm one (410) and the angle adjustment arm two (411).

5. A translational pier safety platform according to claim 4, characterized in that: A steel wire rope is sleeved on the outer edge of the pulley body (505), and the other end of the steel wire rope is sleeved on the outer edge of the main pulley (10). The elevator (9) is mechanically driven by the main pulley (10), and a drive component is provided on the inner wall of the elevator (9).