Anti-falling device for maintenance of elevator car

Abstract

The invention discloses an anti-falling device for elevator car maintenance, and relates to the technical field of elevator maintenance instruments, and the anti-falling device is characterized by comprising a main frame plate, a winding wheel is rotatably arranged on the main frame plate, a safety rope wound at the upper end of the winding wheel is fixed on the winding wheel, and a safety belt is arranged at one end, far away from the winding wheel, of the safety rope; supporting arms are further hinged to the two sides of the main frame plate, and support feet used for abutting against the inner wall of an elevator shaft are hinged to the ends, away from the main frame plate, of the supporting arms. The device is in the shape of an arch bridge placed in the forward direction in the state of being installed in an elevator shaft. According to the device, adaptive design is conducted according to the structure of an elevator shaft, the whole structure is supported on the side wall of the shaft in an arch shape when the device is used, and therefore when an elevator car falls, the device can be fixed by abutting against the side wall of the shaft, and the friction force between the device and the shaft is further increased under the gravity effect of personnel; and therefore, the worker can be stably hung and cannot fall off, and potential safety hazards of overhauling work are eliminated.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator maintenance equipment, and in particular to an elevator car maintenance anti-falling device. Background Art

[0002] Since elevators carry and transport people for a long time, they often malfunction due to frequent loads. When a malfunction occurs, the staff needs to stop the elevator and open the elevator door to enter the elevator shaft to inspect the car. This inevitably requires the staff to stand on the elevator car to carry out inspection and maintenance. Faced with this situation, the maintenance personnel's anti-fall measures and related equipment are not comprehensive enough. Once the car loses control, people will fall with the car, causing personal injury.

[0003] In view of this, a design or technical improvement is now proposed to solve the above problems.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention, and do not constitute an admission that the above contents are the closest prior art. Summary of the invention

[0005] The object of the present invention is to solve the above-mentioned shortcomings and provide an elevator car maintenance anti-falling device.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] An elevator car maintenance anti-fall device comprises a main frame plate, on which a winding wheel is rotatably arranged, on which a safety rope wound around its upper end is fixed, and a safety belt is arranged at the end of the safety rope away from the winding wheel; support arms are also hinged on both sides of the main frame plate, and a support foot for abutting against the inner wall of the elevator shaft is hinged at the end of the support arm away from the main frame plate; when the device is installed in the elevator shaft, it is in the shape of a forward-placed arch bridge.

[0008] Furthermore, movable rollers rotating coaxially therewith are arranged at both ends of the winding wheel, the movable rollers are rotatably connected to the first bearing frame arranged on the main frame plate, and a spring is arranged at one end of the movable roller away from the winding wheel, so that the winding wheel can be automatically wound.

[0009] Furthermore, the main frame plate is also provided with a braking mechanism located on both sides of the winding wheel and used for braking the movable roller, so that when the elevator car falls, the braking mechanism brakes the movable roller.

[0010] Furthermore, the braking mechanism includes a ratchet wheel arranged on the movable roller, a locking assembly for locking the ratchet wheel, and a triggering assembly for triggering the locking assembly.

[0011] Furthermore, the locking assembly includes a ratchet plate rotatably arranged on the main frame plate through a second bearing frame and adapted to the ratchet wheel, a trigger frame movably connected with the main frame plate for driving the ratchet plate to rotate, and a limit frame for limiting the movement of the ratchet plate and the trigger frame; under normal conditions, the ratchet plate is in a horizontal state, and an arc-shaped convex plate located above the tail end of the ratchet plate is arranged on the top side of the trigger frame; the movably connected part between the trigger frame and the main frame plate has friction, so that the trigger frame will not slide freely on the main frame plate due to gravity.

[0012] Furthermore, the trigger assembly includes a traction rope arranged at the bottom end of the trigger frame and a magnetic attraction plate arranged at one end of the traction rope away from the trigger frame.

[0013] Furthermore, an adjustment component for adjusting the length of the traction rope is provided between the traction rope and the trigger frame; the adjustment component includes a horizontal frame plate arranged at the bottom of the trigger frame, a third bearing frame arranged on the lower surface of the horizontal frame plate, a winding shaft rotatably arranged on the third bearing frame and fixed to the traction rope, and a clamping buckle hinged on the lower surface of the horizontal frame plate for clamping the winding shaft; the clamping buckle is locked by a bolt arranged thereon, and a rubber pad is provided on the internal part that fits the winding shaft.

[0014] Furthermore, a movable support plate and a limiting plate located below the movable support plate and used for limiting the support plate are rotatably provided on the support arm, and the movable support plate is in a horizontal state when overlapped on the limiting plate; a supported plate is provided at one end of the movable support plate away from the support arm, and an overlap interface is formed between the supported plate and the limiting plate; a fourth bearing frame is provided on the lower surface of the main frame plate, and a support plate that can be overlapped on the overlap interface is rotatably provided on the fourth bearing frame, and when the support plate is overlapped on the overlap interface, it abuts against the supported plate.

[0015] Compared with the prior art, the beneficial effect of the present solution is as follows: the present device is adaptively designed for the structure of the elevator shaft, so that when in use, the overall structure is supported on the side wall of the shaft in an arch shape, and a safety rope is used to connect the safety belt worn by the staff, so that when the elevator car falls, the entire device will be fixed by supporting the side wall of the shaft, and the friction between the device and the shaft will be further increased under the action of the gravity of the personnel, so that the staff can be stably suspended to prevent them from falling, thereby eliminating the safety hazards of maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 It is a front perspective schematic diagram of the present invention;

[0018] Figure 2 is a bottom-up stereoscopic schematic diagram of the present invention;

[0019] Figure 3 It is a schematic diagram of the coordination between the reel and the safety rope in the present invention;

[0020] Figure 4 It is a structural schematic diagram of the upper end of the main frame plate in the present invention;

[0021] Figure 5 It is a structural schematic diagram of the braking mechanism in the present invention;

[0022] Figure 6 It is a schematic diagram of the cooperation between the locking mechanism and the main frame plate in the present invention;

[0023] Figure 7 is a disassembled schematic diagram of the locking mechanism in the present invention;

[0024] Figure 8 It is a schematic diagram of the structure of the regulating component in the present invention;

[0025] Fig. 9 It is a schematic diagram of the cooperation between the movable abutment plate and the support arm in the present invention;

[0026] Fig.10 It is a schematic diagram of the combination between the supporting plate and the main frame plate in the present invention.

[0027] In the figure: 1. main frame plate; 11. winding wheel; 12. safety rope; 13. safety belt; 14. support arm; 15. support foot; 2. movable roller; 21. first bearing frame; 22. clockwork spring; 3. ratchet; 31. second bearing frame; 32. ratchet plate; 33. trigger frame; 34. limit frame; 35. arc convex plate; 4. traction rope; 41. magnetic plate; 5. cross frame plate; 51. third bearing frame; 52. winding shaft; 53. clamping buckle; 54. bolt; 6. movable support plate; 61. limit plate; 62. support plate; 63. overlap interface; 64. fourth bearing frame; 65. support plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0029] like Figure 1-10The elevator car maintenance anti-fall device shown in the figure comprises a main frame plate 1, on which a winding wheel 11 is rotatably provided, on which a safety rope 12 is fixedly wound on the upper end, and a safety belt 13 is provided at the end of the safety rope 12 away from the winding wheel 11; support arms 14 are also hinged on both sides of the main frame plate 1, and a support foot 15 for abutting against the inner wall of the elevator shaft is hinged at one end of the support arm 14 away from the main frame plate 1; the device is in the shape of a forward-placed arch bridge when installed in the elevator shaft. When the device is in use, the support arm 14 is first unfolded, and the arch bridge shape of the device is used to support the support foot 15 at its end against the inner wall of the elevator shaft for stabilization, and then the staff wears the safety belt 13, and the safety belt 13 can be any commercially available The material of the safety rope 12 is selected to ensure that it can withstand multiple times the average weight of a normal person, to ensure to the greatest extent that it will not break when suspending the staff. After the staff wears the safety belt 13, when they walk on the car, the safety rope 12 can be unwound under the rotation of the reel 11, thereby ensuring the staff's freedom of movement. When the car falls, the staff is suspended on the main frame plate 1 by pulling the safety rope 12. At this time, the arched structure of the device transfers the weight of the staff to the support feet 15 at both ends, so that the support feet 15 are tightened against the inner wall of the elevator shaft, so that the device is stabilized in the shaft by high-strength friction to prevent the staff from falling with the car.

[0030] In one embodiment, movable rollers 2 that rotate coaxially therewith are provided at both ends of the winding wheel 11, and the movable rollers 2 are rotatably connected to the first bearing frame 21 provided on the main frame plate 1. A clockwork spring 22 is provided at one end of the movable roller 2 away from the winding wheel 11, so that the winding wheel 11 can be automatically wound. Through the setting of the clockwork spring 22, the safety rope 12 is always in a taut state when the staff is walking, thereby not affecting the normal activities of the personnel.

[0031] In one embodiment, the main frame plate 1 is further provided with a braking mechanism located on both sides of the winding wheel 11 and used to brake the movable roller 2, so that when the elevator car falls, the braking mechanism brakes the movable roller 2, and the braking mechanism includes a ratchet 3 arranged on the movable roller 2, a locking component for locking the ratchet 3, and a trigger component for triggering the locking component, and the locking component includes a ratchet plate 32 rotatably arranged on the main frame plate 1 through a second bearing frame 31 and adapted to the ratchet 3, a trigger frame 33 movably connected to the main frame plate 1 for driving the ratchet plate 32 to rotate, and a trigger frame 33 for rotating the ratchet plate 32 and the trigger frame 33. The limit frame 34 is movable and limited; in the normal state, the thorn plate 32 is in a horizontal state, and an arc-shaped convex plate 35 located above the tail end of the thorn plate 32 is arranged on the top side of the trigger frame 33; the movable connecting part of the trigger frame 33 and the main frame plate 1 has friction, so that the trigger frame 33 will not be affected by gravity and slide freely on the main frame plate 1, and the trigger assembly includes a traction rope 4 arranged at the bottom end of the trigger frame 33 and a magnetic suction plate 41 arranged at the end of the traction rope 4 away from the trigger frame 33. When the device is in use, the magnetic suction plate 41 is attracted to the metal part on the upper part of the car to form a connection. At this time, the thorn plate 32 is connected to the movable The ratchet wheel 3 on the movable roller 2 is in a separated state, and the winding wheel 11 is in a freely rotatable state, thereby not restricting the unwinding and stretching of the safety rope 12 during the activities of the staff. When the car falls, the car will drive the magnetic plate 41 to fall together. The magnetic plate 41 pulls the trigger frame 33 to slide downward in the main frame plate 1 through the traction rope 4, and then the arc-shaped convex plate 35 arranged inside it is pressed against the tail end of the ratchet plate 32 to make it rotate. At this time, the ratchet plate 32 is stuck in the ratchet wheel 3, so that it can no longer rotate, thereby locking the winding wheel 11, so that the safety rope 12 will not be unwound. When the car continues to fall downward, the magnetic plate 41 will separate from the car. At this time, the staff is lifted and suspended by the fixed safety rope 12, and will not fall with the car. It should be noted that the shape of the limit frame 34 is designed according to actual needs. It mainly ensures that the trigger frame 33 is located at the upper end of the tail of the ratchet plate 32 and maintains a close distance under normal conditions. At the same time, when it slides downward and drives the ratchet plate 32 to rotate, the arc-shaped convex plate 35 is positioned on the side of the tail of the ratchet plate 32 to support it, so that the ratchet plate 32 will not rotate, thereby ensuring the stable clamping between the ratchet plate 32 and the ratchet wheel 3.

[0032] In one embodiment, an adjustment component for adjusting the length of the traction rope 4 is provided between the traction rope 4 and the trigger frame 33; the adjustment component includes a horizontal frame plate 5 provided at the bottom of the trigger frame 33, a third bearing frame 51 provided on the lower surface of the horizontal frame plate 5, a winding shaft 52 rotatably provided on the third bearing frame 51 and fixed to the traction rope 4, and a clamping buckle 53 hinged on the lower surface of the horizontal frame plate 5 for clamping the winding shaft 52; the clamping buckle 53 is locked by a bolt 54 provided thereon, and a rubber pad is provided at the inner part that fits with the winding shaft 52. When the device is in use, the height at which it is set is based on the height of the worker. The height above the shoulders of the staff standing on the car is taken as the standard. Since this height has a range, in order to ensure that the traction rope 4 can remain in a straight state after the magnetic attraction plate 41 is attracted to the upper end of the car, so as to react as quickly as possible when the car falls, the winding shaft 52 on the adjustment component is set so that the traction rope 4 can be wound up by rotation, so that the traction rope 4 is in a straight state, and then the surface of the winding shaft 52 is clamped by the clamping buckle 53, and locked with the bolt 54, so that the winding shaft 52 will not rotate, thereby ensuring the stability of the straight state of the traction rope 4.

[0033] In one embodiment, a movable support plate 6 and a limiting plate 61 located below the movable support plate 6 for limiting the position thereof are rotatably provided on the support arm 14. When the movable support plate 6 is overlapped on the limiting plate 61, it is in a horizontal state; a supported plate 62 is provided at one end of the movable support plate 6 away from the support arm 14, and an overlap interface 63 is formed between the supported plate 62 and the limiting plate 61; a fourth bearing frame 64 is provided on the lower surface of the main frame plate 1, and a supporting plate 65 that can be overlapped on the overlap interface 63 is rotatably provided on the fourth bearing frame 64. When the supporting plate 65 is overlapped on the overlap interface 63, it abuts against the supported plate 62. In order to prevent the support arm 14 from loosening after it is unfolded and supports the elevator shaft, a movable support plate 6 is provided so that it can form a horizontal state by rotation, and then the supporting plate 65 is rotated, so that the supported plate 62 is supported by the end of the supporting plate 65, so that the support arm 14 cannot be folded inwardly, thereby ensuring its stability in supporting the elevator shaft.

[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. An elevator car maintenance anti-fall device, characterized in that: The invention comprises a main frame plate (1), a winding wheel (11) is rotatably arranged on the main frame plate (1), a safety rope (12) wound around the upper end of the winding wheel (11) is fixed on the winding wheel (11), and a safety belt (13) is arranged at one end of the safety rope (12) away from the winding wheel (11); Support arms (14) are hingedly connected to both sides of the main frame plate (1), and a support foot (15) is hingedly connected to one end of the support arm (14) away from the main frame plate (1) for contacting with the inner wall of the elevator shaft; When the device is installed in the elevator shaft, it is in the shape of an arch bridge placed in a forward direction.

2. The elevator car maintenance anti-falling device according to claim 1 is characterized in that: Both ends of the winding wheel (11) are provided with movable rollers (2) that rotate coaxially therewith, the movable rollers (2) are rotationally connected to a first bearing frame (21) arranged on the main frame plate (1), and one end of the movable roller (2) away from the winding wheel (11) is provided with a spring spring (22), so that the winding wheel (11) can be automatically wound.

3. The elevator car maintenance anti-falling device according to claim 2 is characterized in that: The main frame plate (1) is also provided with a braking mechanism located on both sides of the winding wheel (11) and used for braking the movable roller (2), so that when the elevator car falls, the braking mechanism brakes the movable roller (2).

4. The elevator car maintenance anti-falling device according to claim 3 is characterized in that: The braking mechanism comprises a ratchet (3) arranged on a movable roller (2), a locking component for locking the ratchet (3), and a triggering component for triggering the locking component.

5. The elevator car maintenance anti-falling device according to claim 4 is characterized in that: The locking assembly comprises a ratchet plate (32) rotatably arranged on the main frame plate (1) through a second bearing frame (31) and adapted to the ratchet wheel (3), a trigger frame (33) movably connected to the main frame plate (1) and used to drive the ratchet plate (32) to rotate, and a limiting frame (34) used to limit the movable position of the ratchet plate (32) and the trigger frame (33); In a normal state, the thorn plate (32) is in a horizontal state, and an arc-shaped convex plate (35) located above the tail end of the thorn plate (32) is arranged on the top side of the interior of the trigger frame (33); The movable connecting portion between the trigger frame (33) and the main frame plate (1) has friction force, so that the trigger frame (33) can slide freely on the main frame plate (1) without being affected by gravity.

6. The elevator car maintenance anti-falling device according to claim 5, characterized in that: The trigger assembly comprises a traction rope (4) arranged at the bottom end of the trigger frame (33) and a magnetic attraction plate (41) arranged at an end of the traction rope (4) away from the trigger frame (33).

7. The elevator car maintenance anti-falling device according to claim 6, characterized in that: An adjustment component for adjusting the length of the traction rope (4) is provided between the traction rope (4) and the trigger frame (33); The adjustment assembly comprises a horizontal frame plate (5) arranged at the bottom of the trigger frame (33), a third bearing frame (51) arranged on the lower surface of the horizontal frame plate (5), a reeling shaft (52) rotatably arranged on the third bearing frame (51) and fixed to the traction rope (4), and a clamping buckle (53) hinged on the lower surface of the horizontal frame plate (5) for clamping the reeling shaft (52); The clamping buckle (53) is locked by a bolt (54) arranged thereon, and a rubber pad is arranged at the inner portion that is in contact with the winding shaft (52).

8. The elevator car maintenance anti-falling device according to claim 6 or 7, characterized in that: The support arm (14) is rotatably provided with a movable abutment plate (6) and a limiting plate (61) located below the movable abutment plate (6) for limiting the position of the movable abutment plate (6); the movable abutment plate (6) is in a horizontal state when overlapped on the limiting plate (61); A supported plate (62) is provided at one end of the movable abutment plate (6) away from the support arm (14), and an overlap interface (63) is formed between the supported plate (62) and the limiting plate (61); A fourth bearing frame (64) is disposed on the lower surface of the main frame plate (1), and a support plate (65) which can be overlapped on the overlap interface (63) is rotatably disposed on the fourth bearing frame (64); when the support plate (65) is overlapped on the overlap interface (63), it abuts against the supported plate (62).

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