A counterweight fall protection device

Abstract

This utility model provides a fall protection device for a counter-rope wheel, comprising two symmetrically arranged protective components. Each protective component includes a fall arrestor and two sets of fixing plates. The fall arrestor has threaded ends at both ends. The upper parts of the two sets of fixing plates have through holes corresponding to the threaded ends, and the threaded ends are fixed by nuts after passing through the through holes. The two sets of fixing plates are detachably mounted on the frame where the counter-rope wheel is located. This utility model protects the counter-rope wheel by using two symmetrically arranged protective components on both sides. When the counter-rope wheel detaches, the two fall arrestors limit the separation between the counter-rope wheel and the frame, thereby preventing the car or counterweight from falling. Furthermore, the two sets of clamps and their fixing bolts allow for detachable installation on the frame, avoiding additional modifications. It has the advantages of simple structure, high assembly efficiency, and high safety and reliability.

Description

Technical Field

[0001] This utility model relates to the field of elevators, and in particular to a fall protection device with a reverse rope wheel. Background Technology

[0002] The deflector pulley is a movable pulley device installed on the upper part of the car frame and counterweight frame in an elevator system. It reduces the output power and torque of the traction machine by adjusting the traction ratio. Currently, the deflector pulley is directly fixed to the frame without any fall protection device. In reality, due to reasons such as broken deflector shafts or failure of the shaft end clamps, the deflector pulley can detach from the frame, causing the car, counterweight, etc., to fall, resulting in danger. In recent years, an elevator fall accident caused by a detached deflector pulley occurred in a shopping mall in a city in southern my country, resulting in serious casualties.

[0003] Installing anti-fall devices on elevators presents several practical challenges. Installation requires bolts, necessitating drilling into the frame, which not only increases manufacturing steps but may also compromise structural strength and safety. This is especially problematic for older elevators already in use, where drilling into the frame is not feasible. Therefore, finding a solution that allows for easy installation and removal of anti-fall devices, particularly in older elevators, is a pressing issue. Summary of the Invention

[0004] In order to solve the problems existing in the background art, this utility model proposes a fall protection device for a reverse rope wheel.

[0005] A fall protection device for a reverse rope wheel includes two symmetrically arranged protective components. Each protective component includes a fall arresting rod and two sets of fixing plates. The fall arresting rod has threaded ends at both ends. The upper parts of the two sets of fixing plates are respectively provided with stop rod through holes corresponding to the threaded ends. The threaded ends pass through the stop rod through holes and are fixed by nuts. The two sets of fixing plates are detachably mounted on the frame where the reverse rope wheel is located.

[0006] Based on the above, each set of fixing plates includes two clamping plates, and the middle and lower parts of the two clamping plates are respectively provided with fixing through holes. The two clamping plates are respectively used to be set on both sides of the frame, and the fixing through holes are used in conjunction with fixing bolts to fix the clamping plates.

[0007] Based on the above, the diameter of the fall arrestor is larger than the diameter of the threaded end and the diameter of the through hole of the arrestor.

[0008] Based on the above, a washer is provided between the nut and the fixing plate.

[0009] Based on the above, the two protective components are symmetrically arranged about the axle of the anti-rope pulley, and the distance between the two protective components is less than the diameter of the anti-rope pulley.

[0010] This utility model has substantial features and progress compared to the prior art. Specifically, this utility model protects the anti-rope wheel by two protective components symmetrically arranged on both sides of the anti-rope wheel. When the anti-rope wheel falls off, two anti-fall stop bars restrict the separation between the anti-rope wheel and the frame, thereby preventing the car or counterweight from falling. Furthermore, it can be detachably installed on the frame by two sets of clamps and their fixing bolts, avoiding additional modifications. It has the advantages of simple structure, high assembly efficiency, and safety and reliability. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model on the counterweight frame.

[0012] Figure 2 This is a schematic diagram of the structure of this utility model.

[0013] Explanation of reference numerals in the attached diagram: 1. Frame; 2. Reverse rope pulley; 3. Wire rope assembly; 4. Axle; 5. Clamping plate; 6. Fall arrestor bar; 7. Clamping plate; 8. Washer; 9. Nut; 10. Threaded end; 11. Fixing bolt assembly. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] like Figures 1-2 As shown, a fall protection device for a reverse rope wheel includes two symmetrically arranged protective components. Each protective component includes a fall arresting rod 6 and two sets of fixing plates. The two ends of the fall arresting rod 6 are respectively provided with threaded ends 10. The upper parts of the two sets of fixing plates are respectively provided with stop rod through holes corresponding to the threaded ends 10. The threaded ends 10 are fixed by nuts 9 after passing through the stop rod through holes. The two sets of fixing plates are detachably mounted on the frame 1 where the reverse rope wheel 2 is located.

[0016] In use, the two ends of the fall arrestor bar 6 are respectively inserted into the stop plate through holes on the two sets of fixing plates. After the washer 8 is fitted onto the threaded end 10, the fall arrestor bar 6 is fixed between the two sets of fixing plates by the nut 9. The diameter of the fall arrestor bar 6 is larger than the diameter of the threaded end 10 and the diameter of the stop bar through hole. Then, the two sets of fixing plates are respectively fixed to the frame 1 where the anti-rope wheel 2 is located. At this time, the two fall arrestor bars 6 of the two protective components are respectively located above the anti-rope wheel 2. Since the anti-roll wheel 2 is installed on the car or counterweight via the frame 1, and the wire rope assembly 3 is wound around the bottom of the anti-roll wheel 2, if the anti-roll wheel 2 axle breaks or the clamping plate 5 installed on the corresponding wheel axle 4 on the frame 1 fails, causing the anti-roll wheel 2 to fall relative to the frame 1, the car and frame 1 or the counterweight and frame 1 will fall downwards under their own weight. However, under the action of the wire rope assembly 3, the anti-roll wheel 2 will move upwards relative to the frame 1. At this time, since the protective component is fixed on the frame 1, and the distance between the two anti-fall stop bars 6 of the protective component is smaller than the diameter of the anti-roll wheel 2, the relatively upward-moving anti-roll wheel 2 will be stuck between the two anti-fall stop bars 6, thus preventing the anti-roll wheel 2 from detaching from the frame 1, thereby preventing the car or counterweight from falling and achieving fall protection.

[0017] Specifically, each set of fixing plates includes two clamping plates 7. The middle and lower parts of the two clamping plates 7 are respectively provided with fixing through holes. The two clamping plates 7 are respectively used to be installed on both sides of the frame 1. That is, after the two clamping plates 7 are clamped on both sides of the frame 1, the bolts of the fixing bolt group 11 are inserted into the corresponding two fixing through holes. After the nuts of the fixing bolt group 11 are used to fix the bolts on the other side, the clamping plates 7 are fixed. The axle 4 of the anti-rope pulley 2 is installed on both sides of the frame 1. A set of clamping plates 7 is installed on each side of the frame 1. The two sets of clamping plates 7 are detachably installed on the frame 1 on both sides of the anti-rope pulley 2.

[0018] The protective device in this embodiment is assembled using a modular (non-welded) method. The installation process does not require disassembly and secondary assembly of the original anti-corrosion pulley 2, resulting in high assembly efficiency and reliable safety. This device is particularly suitable for the retrofitting of older elevators and can also be installed in new elevator projects, offering convenient and quick assembly. Especially for the retrofitting of older elevators, the installation of this device significantly improves the elevator's safety factor. Furthermore, this device has low manufacturing costs but powerful safety protection functions.

[0019] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A fall protection device with a reverse rope pulley, characterized in that: It includes two symmetrically arranged protective components. Each protective component includes a fall arresting bar and two sets of fixing plates. The fall arresting bar has threaded ends at both ends. The upper part of the two sets of fixing plates is provided with a stop bar through hole corresponding to the threaded end. The threaded end passes through the stop bar through hole and is fixed by a nut. The two sets of fixing plates are detachably mounted on the frame where the anti-rope pulley is located.

2. The anti-fall protection device for the anti-fall pulley according to claim 1, characterized in that: Each set of fixing plates includes two clamping plates, and the middle and lower parts of the two clamping plates are respectively provided with fixing through holes. The two clamping plates are respectively used to be installed on both sides of the frame, and the fixing through holes are used in conjunction with fixing bolts to fix the clamping plates.

3. The anti-fall protection device for the anti-fall pulley according to claim 1, characterized in that: The diameter of the fall arrestor is greater than the diameter of the threaded end and the diameter of the through hole of the arrestor.

4. The anti-fall protection device for the anti-fall pulley according to claim 1, characterized in that: A washer is placed between the nut and the fixing plate.

5. The anti-fall protection device for the anti-fall pulley according to claim 1, characterized in that: The two protective components are symmetrically arranged about the axle of the anti-rope pulley, and the distance between the two protective components is less than the diameter of the anti-rope pulley.

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