A kind of elevator maintenance anti-falling rod

Abstract

The utility model relates to an anti -falling rod for elevator maintenance, including adjusting box, the lateral surface of adjusting box is connected with positioning device, is equipped with adjusting device no.

Description

Technical Field

[0001] This invention relates to the field of fall arrestor technology, and more particularly to a fall arrestor for elevator maintenance. Background Technology

[0002] When maintaining and repairing elevators, maintenance personnel need to enter the elevator shaft for inspection and install fall arrest bars at the elevator doors, securing safety ropes to the bars for personal safety. Patent number "202422554051.0" discloses a fall arrest bar for elevator maintenance, which places an adjustment box outside the elevator. By pulling a limit plate, the relative position between the limit rod and the limit hole is changed, altering the extension length of adjustment rod one and adjustment rod two, and the anti-slip support block is pressed tightly against the wall surface for support. However, this solution's adjustment accuracy for the rod length is limited by the spacing of the limit holes, making it impossible to further reduce the adjustment precision. It also struggles to fully adapt to different wall spacings of elevator doors, making the fall arrest bar prone to loosening during maintenance, posing a risk of it detaching from the wall. Meanwhile, in the event of an elevator descent during maintenance, maintenance personnel are suspended inside the elevator shaft by safety ropes. During this process, the personnel swing with the safety ropes and collide with the inner walls of the elevator shaft, resulting in injury. Furthermore, existing fall arresters cannot help maintenance personnel return to the elevator doors, leaving them constantly at risk of falling while suspended inside the elevator shaft. Therefore, designing a fall arrester for elevator maintenance that improves installation stability and helps maintenance personnel return to the elevator doors in the event of a fall has become an urgent technical problem to be solved. Summary of the Invention

[0003] To solve the above problems, this utility model provides a fall arrestor for elevator maintenance.

[0004] The technical solution of this utility model is an elevator maintenance anti-fall rod, including an adjustment box. A positioning device is connected to the side of the adjustment box, and an adjustment device one is provided on the inner wall. A hanging ring is fixed on the front. A sliding sleeve that runs horizontally through the inside and outside of the adjustment box is also provided on the side of the adjustment box. The positioning device includes a support rod, a support block and an anti-slip block connected horizontally in sequence. The support rod passes through the sliding sleeve and extends into the adjustment box. The adjustment device one includes a lead screw motor, a drive lead screw, a lifting ring and a pair of transmission rods. The lead screw motor is fixed on the inner wall of the adjustment box and is connected to the drive lead screw for transmission. The lifting ring is sleeved on the drive lead screw and threaded. The transmission rods are inclinedly arranged in the adjustment box. A hinge seat one and a hinge seat two are fixed at both ends of the transmission rod, respectively. The hinge seat one is connected to the side of the lifting ring for rotational engagement, and the hinge seat two is connected to the end of the support rod that extends into the adjustment box for rotational engagement.

[0005] With the above structure, during elevator maintenance, the regulating box is placed at the open elevator door, with its front facing the elevator shaft. The positioning device is aligned with the walls on both sides of the elevator door. The screw motor is turned on, driving the drive screw to rotate. The drive screw engages with the lifting ring threadedly, causing the lifting ring to rise and fall along the axial direction of the drive screw. A hinged seat connects to the side of the lifting ring for rotational engagement. During the movement of the lifting ring, it drives the transmission rod to move, changing its tilt. A second hinged seat connects to the end of the support rod that extends into the regulating box for rotational engagement. The moving rod drives the support rod to move along the horizontal sliding sleeve. When the support rod is pushed out of the sliding sleeve to the adjustment box, the support rod pushes the support block closer to the wall. The support block presses the anti-slip block tightly against the wall, completing the fixation of the fall arrestor. Then, the safety rope's hanging ring is hooked onto the hanging ring for connection. Maintenance personnel can then cross the fall arrestor to perform maintenance work in the elevator shaft. This solution allows for smoother movement of the support rod and can stop the screw motor after the support rod extends any length from the adjustment box to match the wall spacing on both sides of the elevator door, making the fixation of the fall arrestor more stable.

[0006] As a further improvement of this utility model, the inner wall of the adjusting box is provided with an adjusting device two that has the same structure as the adjusting device one and is symmetrical in the upper and lower parts. The support rod of any positioning device includes an upper rod and a lower rod. The upper rod and the lower rod pass through a sliding sleeve and are respectively connected to the hinge seat two of the adjusting device one and the adjusting device two for rotational cooperation.

[0007] With the above structure, by setting up an adjustment device two with the same structure as the first adjustment device and symmetrical in the upper and lower parts, the upper rod and lower rod of the positioning device are connected to drive the support rod to move along the sliding sleeve, and the power of the support rod driving the support block to move is more stable.

[0008] As a further improvement of this utility model, the bottom of the regulating box is fixed with a pair of support legs, which extend horizontally to the front and rear sides of the regulating box to form an inverted T-shaped structure.

[0009] With the above structure, a pair of support legs are fixed to the bottom of the regulating box. When fixing the regulating box, the support legs are kept in contact with the ground at the elevator door. The support legs extend horizontally to the front and rear sides of the regulating box to form an inverted T-shaped structure, which provides support on the front and rear sides of the regulating box, preventing the regulating box from tilting to the front and rear sides, and further preventing the anti-slip block pressed against the wall from sliding.

[0010] As a further improvement of this utility model, the surface of the anti-slip block is covered with an anti-slip pad.

[0011] With the above structure, the surface of the anti-slip block is covered with an anti-slip pad. When the anti-slip block is pressed against the wall, the anti-slip pad deforms under pressure and fits against the wall surface to fill the gaps, making the anti-slip block press more tightly against the wall.

[0012] As a further improvement of this utility model, the outer side of the regulating box is connected to an openable positioning hoop, which is tightly fastened to the outside of the support rod.

[0013] With the above structure, by opening the positioning clamp before starting the drive screw, the support rod can move along the sliding sleeve. After stopping the screw motor, the positioning clamp is closed to tighten the support rod again, so as to prevent the support rod from sliding into the adjustment box due to the impact force when maintenance personnel fall, and to prevent the positioning device from becoming loose and unable to continue to be pressed against the wall.

[0014] As a further improvement of this utility model, the regulating box is provided with a buffer assembly. The buffer assembly is located on the front of the regulating box and below the hook ring. The buffer assembly includes a telescopic rod, a support spring and an arc plate. The telescopic rod extends towards the front of the regulating box. One end of the telescopic rod is connected to the regulating box and the other end is connected to the concave surface of the arc plate. The support spring is sleeved on the outside of the telescopic rod, and the two ends of the support spring abut against the front of the regulating box and the concave surface of the arc plate, respectively.

[0015] With the above structure, when maintenance personnel enter the elevator shaft, the safety rope is pressed against the convex surface of the curved plate. In the event of a fall, the safety rope presses downward against the convex surface of the curved plate, causing the curved plate to compress the telescopic rod and support spring. The compression of the support spring generates elasticity, slowing down the movement speed of the curved plate. This, in turn, slows down the movement speed of the safety rope pressed against the curved plate, reducing the degree of swaying at the lower end of the safety rope and preventing maintenance personnel from being injured when they collide with the inner wall of the elevator shaft.

[0016] As a further improvement of this utility model, the front of the regulating box is connected to a mounting base, and the bottom of the mounting base is connected to a folding rope ladder, a fixing rope, and a fixing buckle. The end of the fixing rope is provided with a positioning knot. The fixing buckle includes a base located at the top, and the bottom of the base is provided with a horizontal snap-fit ​​plate. A first rotating shaft with a horizontal axis is connected between the snap-fit ​​plate and the base. A slot is provided on the side of the snap-fit ​​plate away from the base. A strip-shaped support plate is provided below the slot opening. One end of the support plate extends from the edge of the snap-fit ​​plate and is provided with a shaft connection part and a trigger part in sequence. The shaft connection part is provided with a second rotating shaft that connects to the mounting base and has a vertical axis. A release push rod is connected to the concave surface of the arc plate. The position of the release push rod matches the trigger part. The size of the positioning knot is larger than the size of the slot.

[0017] With the above structure, the mounting base is placed on the front of the regulating box. After the fall arrestor is installed, the mounting base extends into the elevator shaft. The folding rope ladder is rolled up below the mounting base. The fixing rope passes under the folding rope ladder and supports it from the bottom. The triggering part is pushed to rotate the support plate and misalign it with the locking plate. The end of the fixing rope connected to the positioning knot is pushed into the locking slot. By setting the size of the positioning knot to be larger than the size of the locking slot, the positioning knot cannot pass through the locking slot and will press against the locking plate. The triggering part is pushed again to reset the locking plate. The locking plate blocks the opening of the locking slot, preventing the fixing rope from falling out of the locking slot and preventing the locking plate from flipping downwards around the first rotating axis. In case of a fall by maintenance personnel... When the curved plate is pressed and moves, the release push rod on the curved plate moves, and the release push rod pushes the trigger part to release the fixed lock. The support plate rotates and misaligns with the locking plate. Under the gravity of the folding rope ladder and the fixed rope, the positioning rope knot presses down on the locking plate. The locking plate rotates downward around the first axis. As the locking plate rotates, the slot of the locking groove faces downward, and the fixed rope falls out of the slot. The folding rope ladder loses the support of the fixed rope and unfolds downward under its own weight, automatically falling into the elevator shaft. This allows maintenance personnel to grab the folding rope ladder and climb back to the anti-fall bar installed on the elevator door. Alternatively, other maintenance personnel outside the elevator shaft can open the fixed lock and manually unfold the folding rope ladder for maintenance personnel inside the shaft to climb.

[0018] As a further improvement of this utility model, the folding rope ladder includes multiple aluminum alloy steps and steel wire ropes connecting the aluminum alloy steps.

[0019] With the above structure, the folding rope ladder, including multiple aluminum alloy steps and steel wire ropes connecting the aluminum alloy steps, ensures high structural strength while reducing its weight, making it easier to store and transport the folding rope ladder and the fall arrestor.

[0020] As a further improvement of this utility model, protruding blocking plates are provided on the left and right sides of the arc-shaped plate.

[0021] With the above structure, protruding blocking plates are provided on the left and right sides of the arc-shaped plate to prevent the safety rope from slipping to the side of the arc-shaped plate and falling off the plate, ensuring that the safety rope remains pressed against the arc-shaped plate in the event of a fall by maintenance personnel. Attached Figure Description

[0022] Figure 1 The diagram shown is a structural schematic of the present invention from a frontal view.

[0023] Figure 2 The diagram shown is a structural schematic from the rear view of this utility model.

[0024] Figure 3 The diagram shown is a structural schematic of a folding rope ladder in its unfolded state.

[0025] Figure 4 The diagram shows the structure of part A with the locking latch engaged.

[0026] Figure 5 The diagram shown is a structural schematic of part B, where the locking latch is disengaged.

[0027] 1-Adjusting box, 2-Positioning device, 3-Adjusting device one, 4-Hanging ring, 5-Sliding sleeve, 6-Support rod, 7-Support block, 8-Anti-slip block, 9-Screw motor, 10-Drive screw, 11-Lifting ring, 12-Transmission rod, 13-Hinge seat one, 14-Hinge seat two, 15-Adjusting device two, 16-Support leg, 17-Positioning clamp, 18-Telescopic rod, 19-Support spring, 20-Arc plate, 21-Mounting seat, 22-Folding rope ladder, 23-Fixing rope, 24-Positioning knot, 25-Base, 26-Snap plate, 27-First rotating shaft, 28-Slot, 29-Support plate, 30-Trigger part, 31-Second rotating shaft, 32-Disengagement push rod, 33-Blocking plate. Detailed Implementation

[0028] like Figures 1-5 The elevator maintenance anti-fall bar shown includes an adjustment box 1, a positioning device 2 connected to the side of the adjustment box 1, an adjustment device 3 on the inner wall, a hanging ring 4 fixed on the front, and a sliding sleeve 5 extending horizontally through the inside and outside of the adjustment box 1. The positioning device 2 includes a support rod 6, a support block 7, and an anti-slip block 8 connected horizontally in sequence. The support rod 6 passes through the sliding sleeve 5 and extends into the adjustment box 1. The adjustment device 3 includes a lead screw motor 9, a drive lead screw 10, a lifting ring 11, and a pair of transmission rods 12. The lead screw motor 9 is fixed to the inner wall of the adjustment box 1 and is connected to the drive lead screw 10 for transmission. The lifting ring 11 is sleeved on the drive lead screw 10 and threadedly connected. The transmission rods 12 are inclinedly arranged inside the adjustment box 1. The two ends of the transmission rod 12 are respectively fixed with a hinge seat 13 and a hinge seat 2 14. The hinge seat 13 is connected to the side of the lifting ring 11 for rotational engagement, and the hinge seat 2 14 is connected to the end of the support rod 6 that extends into the adjustment box 1 for rotational engagement.

[0029] During elevator maintenance, the regulating box 1 is placed at the open elevator door, with its front facing the elevator shaft. The positioning device 2 is aligned with the walls on both sides of the elevator door. The lead screw motor 9 is activated, driving the drive lead screw 10 to rotate. The drive lead screw 10 is threadedly engaged with the lifting ring 11, causing the lifting ring 11 to rise and fall along the axial direction of the drive lead screw 10. A hinge seat 13 is connected to the side of the lifting ring 11 for rotational engagement. During the movement of the lifting ring 11, it drives the transmission rod 12 to move, changing its tilt. A hinge seat 2 is connected to the end of the support rod 6 that extends into the regulating box 1 for rotational engagement. The transmission rod 12 drives the support rod 6 to move along the transverse sliding sleeve 5. When the support rod 6 is pushed out along the sliding sleeve 5 to the adjustment box 1, the support rod 6 pushes the support block 7 closer to the wall. The support block 7 presses the anti-slip block 8 tightly against the wall, completing the fixation of the fall arrestor. Then, the safety rope's hanging ring is hooked onto the hanging ring 4 for connection. Maintenance personnel can then cross the fall arrestor to perform maintenance work in the elevator shaft. In this scheme, the movement of the support rod 6 is smoother, and the screw motor 9 can stop after the support rod 6 extends any length from the adjustment box 1 to match the wall spacing on both sides of the elevator door, making the fixation of the fall arrestor more stable.

[0030] The inner wall of the regulating box 1 is provided with a regulating device 2 15, which has the same structure as the regulating device 3 and is symmetrical in the upper and lower parts. The support rod 6 of any positioning device 2 includes an upper rod and a lower rod. The upper rod and the lower rod pass through a sliding sleeve 5 and are respectively connected to the hinge seat 2 14 of the regulating device 3 and the regulating device 2 15 for rotational cooperation.

[0031] By setting up an adjustment device 2 15 with the same structure as adjustment device 3 and symmetrical in the upper and lower parts, the upper rod and lower rod of positioning device 2 are connected to drive the support rod 6 to move along the sliding sleeve 5, and the power of the support rod 6 to drive the support block 7 to move is more stable.

[0032] The bottom of the regulating box 1 is fixed with a pair of support legs 16, which extend horizontally to the front and rear sides of the regulating box 1 to form an inverted T-shaped structure.

[0033] The bottom of the regulating box 1 is fixed with a pair of support legs 16. When the regulating box 1 is fixed, the support legs 16 are kept in contact with the ground at the elevator door. The support legs 16 extend horizontally to the front and rear sides of the regulating box 1 to form an inverted T-shaped structure, which provides support on the front and rear sides of the regulating box 1, preventing the regulating box 1 from tilting to the front and rear sides, and further preventing the anti-slip block 8 pressed against the wall from sliding.

[0034] The surface of the anti-slip block 8 is covered with an anti-slip pad.

[0035] The surface of the anti-slip block 8 is covered with an anti-slip pad. When the anti-slip block 8 is pressed against the wall, the anti-slip pad deforms under pressure and fits against the wall surface to fill the gaps, making the anti-slip block 8 press more tightly against the wall.

[0036] An openable positioning hoop 17 is connected to the outer side of the regulating box 1, and the positioning hoop 17 is tightly clamped to the outside of the support rod 6.

[0037] By opening the positioning clamp 17 before starting the drive screw 10, the support rod 6 can move along the sliding sleeve 5. After stopping the screw motor 9, the positioning clamp 17 is closed to tighten the support rod 6 again, so as to prevent the support rod 6 from sliding into the adjustment box 1 due to the impact force when maintenance personnel fall, and to prevent the positioning device 2 from becoming loose and unable to continue to be pressed against the wall.

[0038] The regulating box 1 is equipped with a buffer assembly, which is located on the front of the regulating box 1 and below the hook ring 4. The buffer assembly includes a telescopic rod 18, a support spring 19 and an arc plate 20. The telescopic rod 18 extends towards the front of the regulating box 1. One end of the telescopic rod 18 is connected to the regulating box 1 and the other end is connected to the concave surface of the arc plate 20. The support spring 19 is sleeved on the outside of the telescopic rod 18, and the two ends of the support spring 19 abut against the front of the regulating box 1 and the concave surface of the arc plate 20, respectively.

[0039] When maintenance personnel enter the elevator shaft, the safety rope is pressed against the convex surface of the curved plate 20. In the event of a fall, the safety rope presses downward against the convex surface of the curved plate 20, causing the curved plate 20 to compress the telescopic rod 18 and the support spring 19. The compression of the support spring 19 generates elastic force, slowing down the movement speed of the curved plate 20. This, in turn, slows down the movement speed of the safety rope pressed against the curved plate 20, reducing the degree of swing at the lower end of the safety rope and preventing maintenance personnel from being injured when they collide with the inner wall of the elevator shaft.

[0040] The front of the regulating box 1 is connected to the mounting base 21. The bottom surface of the mounting base 21 is connected to the folding rope ladder 22, the fixing rope 23 and the fixing buckle. The end of the fixing rope 23 is provided with the positioning knot 24. The fixing buckle includes a base 25 located at the top. The bottom of the base 25 is provided with a horizontal snap plate 26. The snap plate 26 and the base 25 are connected by a first rotating shaft 27 with a horizontal axis. The snap plate 26 is provided with a slot 28 on the side away from the base 25. The slot 28 is provided with a strip-shaped support plate 29 below the slot. One end of the support plate 29 extends from the edge of the snap plate 26 and is provided with a shaft connection part and a trigger part 30 in sequence. The shaft connection part is provided with a second rotating shaft 31 connected to the mounting base 21 with a vertical axis. The concave surface of the arc plate 20 is connected to the release push rod 32. The position of the release push rod 32 matches the trigger part 30. The size of the positioning knot 24 is larger than the size of the slot 28.

[0041] The mounting base 21 is installed on the front of the regulating box 1. After the anti-fall bar is installed, the mounting base 21 extends into the elevator shaft. The folding rope ladder 22 is rolled up under the mounting base 21. The fixing rope 23 passes under the folding rope ladder 22 and supports it from the bottom. The trigger part 30 is pushed to make the support plate 29 rotate and misalign with the locking plate 26. The end of the fixing rope 23 connected to the positioning knot 24 is pushed into the slot 28. By setting the size of the positioning knot 24 to be larger than the size of the slot 28, the positioning knot 24 cannot pass through the slot 28 and will press on the locking plate 26. The trigger part 30 is pushed again to reset the locking plate 26. The locking plate 26 blocks the slot opening of the slot 28, which prevents the fixing rope 23 from falling out of the slot 28 and prevents the locking plate 26 from flipping downward around the first rotating shaft 27. When the curved plate 20 is pressed and moved during a fall, the release push rod 32 on the curved plate 20 moves, and the release push rod 32 pushes the trigger part 30 to release the fixed lock. The support plate 29 rotates and is misaligned with the locking plate 26. Under the gravity of the folding rope ladder 22 and the fixing rope 23, the positioning knot 24 presses down on the locking plate 26. The locking plate 26 flips downward around the first rotating shaft 27. As the locking plate 26 flips, the slot of the locking groove 28 faces downward, and the fixing rope 23 falls out of the locking groove 28. The folding rope ladder 22 loses the support of the fixing rope 23 and unfolds downward under its own weight, automatically falling into the elevator shaft. This allows maintenance personnel to grab the folding rope ladder 22 and climb back to the anti-fall bar installed on the elevator door. Other maintenance personnel outside the elevator shaft can also open the fixed lock and manually unfold the folding rope ladder 22 for maintenance personnel inside the shaft to climb.

[0042] The folding rope ladder 22 includes multiple aluminum alloy steps and steel wire ropes connecting the aluminum alloy steps.

[0043] By including multiple aluminum alloy steps and steel wire ropes connecting the aluminum alloy steps, the folding rope ladder 22 has high structural strength while reducing its weight, making it easier to store and transport the anti-fall rod.

[0044] The curved plate 20 has protruding baffles 33 on its left and right sides.

[0045] The curved plate 20 has protruding blocking plates 33 on its left and right sides to prevent the safety rope from slipping to the side of the curved plate 20 and falling off, ensuring that the safety rope remains pressed against the curved plate 20 in the event of a fall by maintenance personnel.

Claims

1. An anti-falling lever for elevator maintenance, characterized by: The system includes an adjustment box (1), a positioning device (2) connected to the side of the adjustment box (1), an adjustment device (3) on the inner wall, a hanging ring (4) fixed on the front, and a sliding sleeve (5) that runs horizontally through the inside and outside of the adjustment box (1). The positioning device (2) includes a support rod (6), a support block (7), and an anti-slip block (8) connected horizontally in sequence. The support rod (6) passes through the sliding sleeve (5) and extends into the adjustment box (1). The adjustment device (3) includes a screw motor (9), a drive screw (10), a lifting ring (11), and a pair of transmission rods (12). The lead screw motor (9) is fixed on the inner wall of the regulating box (1). The lead screw motor (9) is connected to the drive lead screw (10) for transmission. The lifting ring (11) is sleeved on the drive lead screw (10) and threaded. The transmission rod (12) is inclinedly set in the regulating box (1). The two ends of the transmission rod (12) are respectively fixed with hinge seat one (13) and hinge seat two (14). Hinge seat one (13) is connected to the side of the lifting ring (11) for rotational cooperation. Hinge seat two (14) is connected to the end of the support rod (6) that extends into the regulating box (1) for rotational cooperation.

2. The anti-falling rod for elevator maintenance according to claim 1, characterized in that: The inner wall of the regulating box (1) is provided with a regulating device 2 (15) which has the same structure as the regulating device 1 (3) and is symmetrical in the upper and lower parts. The support rod (6) of any positioning device (2) includes an upper rod and a lower rod. The upper rod and the lower rod pass through a sliding sleeve (5) and are respectively connected to the hinge seat 2 (14) of the regulating device 1 (3) and the regulating device 2 (15) for rotational cooperation.

3. The anti-falling rod for elevator maintenance according to claim 1, characterized in that: The bottom of the regulating box (1) is fixed with a pair of support legs (16), which extend horizontally to the front and rear sides of the regulating box (1) to form an inverted T-shaped structure.

4. The anti-falling rod for elevator maintenance according to claim 1, characterized in that: The surface of the anti-slip block (8) is covered with an anti-slip pad.

5. The anti-falling rod for elevator maintenance according to any one of claims 1-4, characterized in that: The outer side of the regulating box (1) is connected to an openable positioning hoop (17), which is tightly clamped to the outside of the support rod (6).

6. The anti-falling rod for elevator maintenance according to claim 1, characterized in that: The regulating box (1) is equipped with a buffer assembly. The buffer assembly is located on the front of the regulating box (1) and below the hook ring (4). The buffer assembly includes a telescopic rod (18), a support spring (19) and an arc plate (20). The telescopic rod (18) extends towards the front of the regulating box (1). One end of the telescopic rod (18) is connected to the regulating box (1), and the other end is connected to the concave surface of the arc plate (20). The support spring (19) is sleeved on the outside of the telescopic rod (18). The two ends of the support spring (19) abut against the front of the regulating box (1) and the concave surface of the arc plate (20) respectively.

7. The fall arrest bar of claim 6, wherein: The front of the regulating box (1) is connected to a mounting base (21). The bottom of the mounting base (21) is connected to a folding rope ladder (22), a fixing rope (23), and a fixing buckle. The end of the fixing rope (23) is provided with a positioning knot (24). The fixing buckle includes a base (25) located at the top. The bottom of the base (25) is provided with a horizontal snap-fit ​​plate (26). The first rotating shaft (27) is horizontally connected to the snap-fit ​​plate (26) and the base (25). The side of the snap-fit ​​plate (26) away from the base (25) is provided with a... The slot (28) has a strip-shaped support plate (29) below the slot opening. One end of the support plate (29) extends from the edge of the snap plate (26) and is provided with a shaft connection part and a trigger part (30) in sequence. The shaft connection part is provided with a second rotating shaft (31) with a connecting mounting base (21) and a vertical axis. The concave surface of the arc plate (20) is connected to a release push rod (32). The position of the release push rod (32) matches the trigger part (30). The size of the positioning knot (24) is larger than the size of the slot (28).

8. The elevator maintenance anti-fall bar according to claim 6, characterized in that: The folding rope ladder (22) includes multiple aluminum alloy steps and steel wire ropes connecting the aluminum alloy steps.

9. The fall arrest bar of claim 6, wherein: The curved plate (20) has protruding baffles (33) on both the left and right sides.

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