Protective device for elevator maintenance

Abstract

The utility model belongs to the technical field of elevator maintenance, and particularly relates to a protective device for elevator maintenance, which comprises a middle frame, the middle frame is a rectangular frame body, a left side plate is fixed at the left end of the middle frame, left guide through holes are formed in the corners of the left side plate, and left guide rods are inserted into the four left guide through holes in a sliding manner; a left abutting plate is fixedly connected to the left end of the left guide rod, a left shielding plate is fixedly installed on the front side of the left abutting plate, a right side plate is fixed to the right end of the middle frame, right guide penetrating holes are formed in the corners of the right side plate, and right guide rods are slidably inserted into the four right guide penetrating holes in a penetrating mode. The middle frame fixed to the elevator door frame can serve as a shielding guardrail, passengers are prevented from entering the elevator door frame, safety protection can be conducted on the passengers, meanwhile, the elevator operation buttons are shielded through the left shielding plate and the right shielding plate, the passengers cannot press the elevator operation buttons, at the moment, an elevator cannot be started, and safety protection is achieved. And safety protection is provided for workers who enter the elevator for maintenance.

Description

Technical Field

[0001] This utility model relates to the field of elevator maintenance technology, specifically a protective device for elevator maintenance. Background Technology

[0002] An elevator is an electromechanical device that uses a car running along rigid guide rails or steps running along a fixed route to move people or goods up and down or sideways. It includes passenger (freight) elevators, escalators, and moving walkways. Based on its purpose, it can be divided into passenger elevators, freight elevators, medical elevators, dumbwaiters, and sightseeing elevators. Based on its drive method, it can be divided into AC elevators, DC elevators, hydraulic elevators, and rack and pinion elevators. Based on its operating speed, it can be divided into low-speed elevators, medium-speed elevators, high-speed elevators, and ultra-high-speed elevators. Based on its control method, it can be divided into elevators operated by hand switches, elevators controlled by buttons, elevators controlled by signals, and elevators with collective control. Based on the location of its machine room, it can be divided into elevators with an upper machine room, elevators with a lower machine room, elevators with a side machine room, and elevators without a machine room.

[0003] To ensure safe operation, elevators need to be inspected and maintained regularly. During the maintenance process, the following problems may occur: First, passengers may ignore warning signs and touch the elevator buttons, causing the elevator to start unexpectedly and threatening the lives of maintenance personnel; second, passengers may cross the safety railings and enter the elevator shaft, causing them to fall and endanger their lives. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the shortcomings of the prior art, this utility model provides a protective device for elevator maintenance, which solves the problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0008] A protective device for elevator maintenance includes a central frame, which is a rectangular frame. A left side plate is fixed to the left end of the central frame. Each corner of the left side plate has a left guide hole, and a left guide rod is slidably inserted into each of the four left guide holes. A left abutment plate is fixedly connected to the left end of each left guide rod, and a left baffle plate is fixedly installed on the front side of the left abutment plate. A right side plate is fixed to the right end of the central frame. Each corner of the right side plate has a right guide hole, and a right guide rod is slidably inserted into each of the four right guide holes. A right abutment plate is fixedly connected to the right end of each right guide rod, and a right baffle plate is fixedly installed on the front side of the right abutment plate. A front baffle plate is fixed to the front side of the central frame. The side plate has a tensioning operating shaft rotatably connected to its center. A drive bevel gear is fixedly connected to the rear end of the tensioning operating shaft, and a triangular hole is provided at the front end. A central shaft plate is fixedly connected to the center of the central frame. A double-ended reverse screw is rotatably connected to the central axis of the central shaft plate. A driven bevel gear is fixedly inserted into the center of the double-ended reverse screw, and the drive bevel gear meshes with the driven bevel gear. A left screw hole plate is fixedly connected to the right end of the left guide rod, and a right screw hole plate is fixedly connected to the left end of the right guide rod. The left end of the double-ended reverse screw is adapted to engage the central screw hole of the left screw hole plate, and the right end of the double-ended reverse screw is adapted to engage the central screw hole of the right screw hole plate.

[0009] Furthermore, each of the bottom corners of the central frame is hinged with a support screw, and the bottom ends of the four support screws are threaded with an adjusting screw tube.

[0010] Furthermore, the outer surfaces of both the left and right contact plates are bonded with rubber layers.

[0011] Furthermore, a shell plate is fixed to the top surface of the central frame, and a handle is fixedly installed on the top of the shell plate.

[0012] Furthermore, button isolation strips are fixed to the back of both the left and right baffles.

[0013] Furthermore, four elastic clips are fixedly installed at the bottom center of the central frame.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a protective device for elevator maintenance, which has the following beneficial effects:

[0016] This utility model provides a safety protection for elevators by using a central frame fixed to the elevator door frame as a barrier to prevent passengers from entering the elevator door frame during elevator maintenance.

[0017] This invention provides safety protection for elevator maintenance personnel by blocking the elevator operation buttons with left and right baffles during elevator maintenance, preventing passengers from pressing the buttons and thus preventing the elevator from starting. Attached Figure Description

[0018] Figure 1 This is a front view of the main structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the back of the main structure of this utility model;

[0020] Figure 3 This is a top view of the main structure of this utility model.

[0021] In the diagram: 1. Central frame; 2. Left side plate; 3. Left guide rod; 4. Left contact plate; 5. Left baffle plate; 6. Right side plate; 7. Right guide rod; 8. Right contact plate; 9. Right baffle plate; 10. Front side plate; 11. Tightening / loosening operating shaft; 12. Driving bevel gear; 13. Triangular hole; 14. Central shaft plate; 15. Double-ended reverse screw; 16. Driven bevel gear; 17. Left screw hole plate; 18. Right screw hole plate; 19. Support screw; 20. Adjusting screw tube; 21. Rubber layer; 22. Outer shell plate; 23. Handle; 24. Button isolation strip; 25. Elastic clip. Detailed Implementation

[0022] 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.

[0023] Example

[0024] like Figure 1 , 2As shown in Figure 3, an embodiment of this utility model provides a protective device for elevator maintenance, comprising a central frame 1, which is a rectangular frame. A left side plate 2 is fixed to the left end of the central frame 1. Each corner of the left side plate 2 has a left guide hole, and a left guide rod 3 is slidably inserted into each of the four left guide holes. A left abutment plate 4 is fixedly connected to the left end of the left guide rod 3. A left baffle plate 5 is fixedly installed on the front side of the left abutment plate 4. A right side plate 6 is fixed to the right end of the central frame 1. Each corner of the right side plate 6 has a right guide hole, and a right guide rod 7 is slidably inserted into each of the four right guide holes. A right abutment plate 8 is fixedly connected to the right end of the right guide rod 7. A right baffle plate 9 is fixedly installed on the front side of the right abutment plate 8. A front side plate is fixed to the front side of the central frame 1. 10. A tensioning operation shaft 11 is rotatably connected to the middle of the front side plate 10. A drive bevel gear 12 is fixedly connected to the rear end of the tensioning operation shaft 11. A triangular hole 13 is opened at the front end of the tensioning operation shaft 11. A central shaft plate 14 is fixedly connected to the middle of the central frame 1. A double-headed reverse screw 15 is rotatably connected to the central axis of the central shaft plate 14. A driven bevel gear 16 is fixedly inserted and connected to the middle of the double-headed reverse screw 15. The drive bevel gear 12 meshes with the driven bevel gear 16. A left screw hole plate 17 is fixedly connected to the right end of the left guide rod 3. A right screw hole plate 18 is fixedly connected to the left end of the right guide rod 7. The left end of the double-headed reverse screw 15 is adapted to screw into the central screw hole of the left screw hole plate 17. The right end of the double-headed reverse screw 15 is adapted to screw into the central screw hole of the right screw hole plate 18.

[0025] In this embodiment, the maintenance personnel hold a triangular key and turn the tensioning operating shaft 11 forward through the triangular hole 13. At this time, the driving bevel gear 12 drives the driven bevel gear 16 and the double-headed reverse screw 15 to rotate, causing the left screw hole plate 17 and the right screw hole plate 18 to move closer to each other. Then, the left guide rod 3 and the right guide rod 7 cause the left abutment plate 4 and the right abutment plate 8 to move closer to each other until the left abutment plate 4 and the right abutment plate 8 are embedded in the elevator door frame. At this time, the height of the middle frame 1 is adjusted so that the left cover plate 5 and the right cover plate 9 block the elevator operation buttons. Then, the tensioning operating shaft 11 is turned in the opposite direction to move the left abutment plate 4 and the right abutment plate 8 away from each other until they abut against the inner wall of the elevator door frame, thus fixing the middle frame 1 to the middle of the elevator door frame.

[0026] At this time, the elevator maintenance protective device has two functions. First, the middle frame 1 fixed to the elevator door frame can act as a barrier to prevent passengers from entering the elevator door frame, thus providing safety protection for passengers. Second, the left and right shields 5 and 9 block the elevator operation buttons, preventing passengers from pressing them. At this time, the elevator cannot be started, thus providing safety protection for personnel entering the elevator for maintenance.

[0027] Furthermore, such as Figure 2As shown, the bottom corners of the central frame 1 are all hinged with support screws 19, and the bottom ends of the four support screws 19 are all threaded with adjusting screw tubes 20.

[0028] In use, first bend the support screw 19 to be perpendicular to the bottom surface of the middle frame 1. Then, the middle frame 1 can be suspended above the ground by turning the adjusting screw tube 20 until the left baffle 5 and the right baffle 9 block the elevator start button. Then, by turning the tensioning operating shaft 11, the left abutment plate 4 and the right abutment plate 8 can be pushed closer or further apart by the driving bevel gear 12, the driven bevel gear 16 and the double-headed reverse screw 15, so as to achieve the above-mentioned protective function.

[0029] Furthermore, such as Figure 2 As shown, the outer surfaces of the left contact plate 4 and the right contact plate 8 are both bonded with rubber layers 21.

[0030] The rubber layer 21 makes the left contact plate 4 and the right contact plate 8 more stable when they contact the two side walls of the elevator door frame, and also acts as a buffer to avoid indentations on the two side walls of the elevator door frame.

[0031] Furthermore, such as Figure 2 As shown, a shell plate 22 is fixed to the top surface of the middle frame 1, and a handle 23 is fixedly installed on the top of the shell plate 22.

[0032] The outer shell 22 protects the mechanical components installed in the middle frame 1, and the handle 23 makes it convenient for users to carry this type of elevator maintenance protective device.

[0033] Furthermore, such as Figure 2 As shown, button isolation strips 24 are fixed behind both the left and right cover plates 5 and 9.

[0034] The button isolation strip 24 can prevent the back of the left and right partitions 5 and 9 from contacting the elevator buttons, thus preventing accidental button presses.

[0035] Furthermore, such as Figure 2 As shown, four elastic clips 25 are fixedly installed at the bottom center of the middle frame 1. The four elastic clips 25 are used to hold the four support screws 19 in the retracted state.

[0036] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A protective device for elevator maintenance, comprising a middle frame (1), characterized in that: The central frame (1) is a rectangular frame. A left side plate (2) is fixed to the left end of the central frame (1). Left guide holes are provided at the corners of the left side plate (2). A left guide rod (3) is slidably inserted into each of the four left guide holes. A left abutment plate (4) is fixedly connected to the left end of the left guide rod (3). A left shield plate (5) is fixedly installed on the front side of the left abutment plate (4). A right side plate (6) is fixed to the right end of the central frame (1). A right guide hole is provided at the corners of the right side plate (6). A right guide rod (7) is slidably inserted into each of the four right guide holes. A right abutment plate (8) is fixedly connected to the right end of the right guide rod (7). A right shield plate (9) is fixedly installed on the front side of the right abutment plate (8). A front side plate (10) is fixed to the front side of the central frame (1). A tensioning device is rotatably connected to the middle of the front side plate (10). The operating shaft (11) is fixedly connected to the rear end of the tightening and loosening operating shaft (11) with a drive bevel gear (12). The front end of the tightening and loosening operating shaft (11) is provided with a triangular hole (13). The middle part of the middle frame (1) is fixedly connected to the middle shaft plate (14). The central axis of the middle shaft plate (14) is rotatably connected to a double-headed reverse screw (15). The middle part of the double-headed reverse screw (15) is fixedly connected to a driven bevel gear (16). The drive bevel gear (12) meshes with the driven bevel gear (16). The right end of the left guide rod (3) is fixedly connected to a left screw hole plate (17). The left end of the right guide rod (7) is fixedly connected to a right screw hole plate (18). The left end of the double-headed reverse screw (15) is adapted to be screwed into the center screw hole of the left screw hole plate (17). The right end of the double-headed reverse screw (15) is adapted to be screwed into the center screw hole of the right screw hole plate (18).

2. A protective device for elevator maintenance according to claim 1, characterized in that The bottom corners of the central frame (1) are all hinged with support screws (19), and the bottom ends of the four support screws (19) are all threaded with adjusting screws (20).

3. A protective device for elevator maintenance according to claim 1, characterized in that: The outer surfaces of the left contact plate (4) and the right contact plate (8) are both bonded with rubber layers (21).

4. The elevator maintenance shield of claim 1, wherein: The top surface of the middle frame (1) is fixed with an outer shell plate (22), and a handle (23) is fixedly installed on the top of the outer shell plate (22).

5. The elevator maintenance shield of claim 1, wherein: Both the left and right cover plates (5 and 9) have button isolation strips (24) fixed behind them.

6. A protective device for elevator maintenance according to claim 1, characterized in that: Four elastic clips (25) are fixedly installed at the bottom center of the middle frame (1).

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