A safety protection device for easy maintenance of elevator car top

Abstract

This invention discloses a safety protection device for facilitating elevator car top maintenance, comprising a base, a first support structure, and a second support structure. The first support structure includes a bent column, a crossbar, and a limiting structure. The bent column comprises multiple single columns connected in series and a stop plate. The crossbar is hinged to the upper end of the bent column. Elastic tightening members are hinged between the bent column, the crossbar, and the base. The first limiting structure is sleeved on the outside of the bent column. The second limiting structure includes mutually hinged limiting rods, which are cross-hinged between adjacent bent columns. The second support structure includes a main support column and a buffer bent rod. This invention can solve the problems of maintenance personnel easily causing car top swaying during maintenance activities on the car top, making maintenance inconvenient, increasing physical fatigue, and easily leading to falls and injuries, damage to related components of the car top. It also addresses the issue of elevators suddenly surging upwards due to malfunctions or personnel misoperation when the buffer above the elevator shaft fails, which can easily injure maintenance personnel.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, specifically a safety protection device that facilitates maintenance of the elevator car top. Background Technology

[0002] Upper limit switches and limit switches are installed at the top of the elevator shaft. During maintenance, the car stops halfway to the top floor. Further movement will cause the counterweight to press against the buffer. If the buffer is functioning properly, friction and gravity will prevent the elevator from wobbling. However, as elevators age, the buffer may age and fail, rendering it ineffective. If the wrong direction is pressed during maintenance, the elevator could crash through the floor, injuring maintenance personnel. Furthermore, maintenance personnel inevitably move around on the car top to check all areas, but frequent and large movements can cause the car top to sway, making maintenance difficult and inconvenient, increasing fatigue from long hours of work, and greatly increasing the risk of falls and injuries, potentially damaging car top components. Summary of the Invention

[0003] The purpose of this invention is to address the problems that maintenance personnel often experience when performing maintenance activities on the elevator car top, leading to car top swaying, making maintenance work difficult and inconvenient, increasing physical fatigue during long maintenance periods, and increasing the risk of falls and injuries, damage to car top components, and the risk of injury to maintenance personnel if the buffer above the elevator shaft fails and the elevator suddenly rises to the top due to malfunction or personnel misoperation. Therefore, this invention provides a safety protection device that facilitates maintenance on the elevator car top.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a safety protection device for easy maintenance of elevator car top, comprising a base, a first support structure, and a second support structure. The first support structure includes multiple bent columns, a crossbar, a first limiting structure, and a second limiting structure, all equidistantly hinged along the edge of the base. Each bent column comprises multiple single columns connected in series and a receiving plate fixed to the top of the single column. The crossbar is hinged to the upper end of the bent column. Elastic tightening members are hinged between the crossbar and the uppermost single column of the bent column, and between the base and the lowermost single column of the bent column. The first limiting structure is fitted onto the outer wall of the structure formed by the multiple bent columns to tighten and limit their movement. The second limiting structure includes a pair of limiting rods hinged to each other in an X-shape. The upper end of the limiting rod is hinged to the inner side of the upper end of the bent column, and its upper end is hinged to the inner side of the bottom of the adjacent bent column. The second support structure includes a main support column and a buffer bent rod.

[0005] As a further description of the above technical solution:

[0006] The base has a movable groove at the hinge point with the bent column.

[0007] As a further description of the above technical solution:

[0008] Both the upper and lower ends of a single column are provided with wedge-shaped surfaces, and the wedge-shaped surfaces of adjacent single columns are opposite each other and oriented towards the axis of the base.

[0009] As a further description of the above technical solution:

[0010] A filler is provided between the wedge-shaped surfaces of adjacent single columns. The filler is an elastic filler and is bonded and fixed to the contact surface of the wedge-shaped surface. An elastic sealing element is provided on the outside of the connection between adjacent single columns.

[0011] As a further description of the above technical solution:

[0012] The upper end of the abutment plate is equipped with a concave elastic buffer structure.

[0013] As a further description of the above technical solution:

[0014] The main support column is sleeved on the outside of the multiple sets of steel wire rope structures used for elevator car traction and fixed to the center of the base by a fixing plate. Multiple buffer bends with outward radial structure are equidistantly arranged along the side wall of the lower end of the main support column. The concave surface of the buffer bends faces outward, and the bottom of the buffer bends is connected to the base by abutment plates.

[0015] As a further description of the above technical solution:

[0016] The upper end of the main support column is mirrored in structure with its lower end. The abutment plate at the upper end of the main support column is connected to the bottom of the load-bearing plate, and the load-bearing plate is fixed to the main support column.

[0017] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0018] 1. The safety protection device for elevator car top maintenance of the present invention, through the design of a multi-area, multi-layer, progressively enhanced buffer structure, can provide maintenance personnel with a certain escape opportunity in the event of a sudden upward impact due to elevator malfunction or personnel misoperation during car top maintenance. The first support structure uses abutment plate deformation for initial buffering, the force is transmitted to the bending column, which bends outward relative to the crossbar. The second limiting structure rotates and descends, the elastic tightening member stretches, and the reverse elastic force provides secondary buffering. Adjacent single columns bend, forming a wedge-shaped surface. The elastic filler is squeezed and the elastic sealing piece on its outside stretches and recovers its elasticity. The single column drives the first limiting structure to stretch and recover its elasticity, which performs three buffering operations. At the same time, the load-bearing plate is compressed and deformed, and the radial buffer structure of the buffer bend deforms and opens. When the pressure is still large, the connection between the buffer bend and the load-bearing plate breaks, and the abutment plate at its end slides out and abuts or inserts into the floor slab, supporting and relieving the force by increasing the support surface until the elevator stops rising. During this period, maintenance personnel can escape to the landing door through the gap between the limiting structures.

[0019] 2. Maintenance workers can lean against the crossbar, the second limit structure, or the first limit structure to carry out maintenance work. Through the elastic force relief by tilting, the base is subjected to force at multiple points, which reduces the swaying of the elevator car and the physical fatigue of long-term maintenance work, so as to facilitate the maintenance work on the top of the elevator car. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a front sectional view of a safety protection device that facilitates maintenance on the top of an elevator car.

[0022] Figure 2 This is a front view of a safety protection device (secondary support structure omitted) for easy maintenance of the elevator car top, taken during use.

[0023] Figure 3 This is a front view of a safety protection device (second support structure omitted) for easy maintenance of the elevator car top, in its second usage state.

[0024] Legend:

[0025] 1. Base; 2. Bending column; 3. Crossbar; 4. Elastic tightening component; 5. First limiting structure; 6. Second limiting structure; 7. Main support column; 8. Buffer bending rod; 9. Load-bearing plate; 11. Movable groove; 21. Single column; 22. Filler; 23. Elastic sealing component; 24. Abutment plate; 81. Abutment plate. 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] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] Please see Figure 1-3 This invention provides a technical solution: a safety protection device for easy maintenance of elevator car top, comprising a base 1, a first support structure, and a second support structure. The first support structure includes multiple bent columns 2, a crossbar 3, a first limiting structure 5, and a second limiting structure 6, all equidistantly hinged along the circumferential edge of the base 1. Each bent column 2 includes multiple single columns 21 connected in series and an abutment plate 24 fixed to the top of each column 21. The crossbar 3 is hinged to the upper end of the bent column 2. Elastic tightening members 4 are hinged between the crossbar 3 and the uppermost single column 21 of the bent column 2, and between the base 1 and the lowermost single column 21 of the bent column 2. The limiting structure 5 is fitted onto the outer wall of the structure formed by multiple bent columns 2 to tighten and limit its movement. The second limiting structure 6 includes a pair of limiting rods that are hinged to each other in an X-shape. The upper end of the limiting rod is hinged to the inner side of the upper end of the bent column 2, and its upper end is hinged to the inner side of the bottom of the adjacent bent column 2. The second support structure includes a main support column 7 and a buffer bent rod 8. The safety protection device for elevator car top maintenance of the present invention, through the design of a buffer structure that is progressively enhanced in multiple areas and multiple levels, can provide maintenance personnel with a certain escape opportunity in the event that the elevator suddenly rises and hits the top due to a malfunction or human error during car top maintenance.

[0029] The base 1 is provided with a movable groove 11 at the hinge point with the bent column 2, which reduces wear and makes the position adjustment between the base and the bent column more flexible.

[0030] Both the upper and lower ends of the single column 21 are provided with wedge-shaped surfaces. The wedge-shaped surfaces of adjacent single columns 21 are opposite each other and oriented towards the axis of the base 1, which makes the support and buffer structure reasonable and more effective.

[0031] A filler 22 is provided between the wedge-shaped surfaces of adjacent single columns 21. The filler 22 is an elastic filler and is bonded and fixed to the contact surface of the wedge-shaped surface. An elastic sealing member 23 is provided on the outside of the connection between adjacent single columns 21. When adjacent single columns are bent, their wedge-shaped surfaces squeeze the elastic filler and the elastic sealing member on their outside stretches the restoring elastic force. The single column drives the first limiting structure to stretch the restoring elastic force, thus buffering and unloading the force.

[0032] The upper end of the abutment plate 24 is provided with a concave elastic buffer structure, which is buffered by the abutment plate deformation in the first support structure.

[0033] The main support column 7 is fitted around the multiple sets of steel wire rope structures used for elevator car traction and fixed to the center of the base 1 by a fixing plate. Multiple buffer rods 8 are equidistantly arranged along the side wall of the lower end of the main support column 7, with the concave surface of the buffer rods 8 facing outward. The bottom of the buffer rods 8 is connected to the base 1 by abutment plates 81. The upper end of the main support column 7 is mirrored with its lower end. The abutment plate 81 at the upper end of the main support column 7 is connected to the bottom of the load-bearing plate 9. The load-bearing plate 9 is fixed to the main support column 7. When the load-bearing plate is compressed and deformed, the radial buffer structure of the buffer rods deforms and opens. When the pressure is still large, the connection between the buffer rod and the load-bearing plate breaks, and the abutment plate at its end slides out and abuts or inserts into the floor slab, thus supporting and relieving the force by increasing the support surface until the elevator stops rising. During this period, maintenance personnel can escape to the landing door through the gap between the limiting structures.

[0034] The working principle of a safety protection device for facilitating elevator car top maintenance in this embodiment includes: the safety protection device in its normal state, i.e., usage state one (such as...). Figure 2 Maintenance workers can lean against the crossbar 3, the second limiting structure 6, or the first limiting structure 5 to perform maintenance work. This tilting provides elastic stress relief, and the base 1 experiences multi-point stress, reducing elevator car swaying and physical fatigue during long maintenance periods, thus facilitating maintenance work on the elevator car top. However, during top maintenance, if the elevator malfunctions or is misoperated, it may suddenly rise and hit the top. The abutment plate 24 and the load-bearing plate 9 will first collide with the top floor slab. The abutment plate 24 in the first support structure deforms upon contact, providing initial cushioning. The force is then transmitted to the bending column 2, which bends outward relative to the crossbar 3. The second limiting structure 6 rotates and descends, stretching the elastic tightening member 4. The reverse elastic force provides secondary cushioning. Adjacent single columns 21 bend, causing their wedge-shaped surfaces to compress the elastic filler 22, while the elastic sealing member 23 on their outer side stretches its restoring elastic force. The single column 21 then drives the first limiting structure 5 to stretch its restoring elastic force, providing a third round of cushioning. This is the second usage state of the first support structure (e.g., Figure 3 At the same time, the load-bearing plate 9 is compressed and deformed, and the radial buffer structure of the buffer rod 8 is deformed and opened. When the pressure is still large, the connection between the buffer rod 8 and the load-bearing plate 9 breaks, and the abutment plate 81 at its end slides out and abuts or inserts into the floor slab, supporting and unloading the force by increasing the support surface until the elevator stops rising. During this period, maintenance personnel can escape to the landing door through the gap between the limiting structures.

[0035] In summary, due to the adoption of the above technical solution, the safety protection device for easy maintenance of elevator car tops in this embodiment has the following advantages compared to the prior art:

[0036] 1. The safety protection device for elevator car top maintenance of the present invention, through the design of a multi-area, multi-layer, progressively enhanced buffer structure, can provide maintenance personnel with a certain escape opportunity in the event of a sudden upward impact due to elevator malfunction or personnel misoperation during car top maintenance. The first support structure uses abutment plate deformation for initial buffering, the force is transmitted to the bending column, which bends outward relative to the crossbar. The second limiting structure rotates and descends, the elastic tightening member stretches, and the reverse elastic force provides secondary buffering. Adjacent single columns bend, forming a wedge-shaped surface. The elastic filler is squeezed and the elastic sealing piece on its outside stretches and recovers its elasticity. The single column drives the first limiting structure to stretch and recover its elasticity, which performs three buffering operations. At the same time, the load-bearing plate is compressed and deformed, and the radial buffer structure of the buffer bend deforms and opens. When the pressure is still large, the connection between the buffer bend and the load-bearing plate breaks, and the abutment plate at its end slides out and abuts or inserts into the floor slab, supporting and relieving the force by increasing the support surface until the elevator stops rising. During this period, maintenance personnel can escape to the landing door through the gap between the limiting structures.

[0037] 2. Maintenance workers can lean against the crossbar, the second limit structure, or the first limit structure to carry out maintenance work. Through the elastic force relief by tilting, the base is subjected to force at multiple points, which reduces the swaying of the elevator car and the physical fatigue of long-term maintenance work, so as to facilitate the maintenance work on the top of the elevator car.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A safety device for facilitating access to the roof of an elevator car, comprising: The system includes a base (1), a first support structure, and a second support structure. The first support structure includes multiple bent columns (2) that are equidistantly hinged along the edge of the base (1), a crossbar (3), a first limiting structure (5), and a second limiting structure (6). Each bent column (2) includes multiple single columns (21) that are connected in series and a receiving plate (24) fixed to the top of the uppermost single column (21). The crossbar (3) is hinged to the upper end of the bent column (2). The crossbar (3) is connected to the uppermost single column (21) of the bent column (2). An elastic tightening member (4) is hinged between the base (1) and the lowest single column (21) of the bent column (2). The first limiting structure (5) is sleeved on the outer wall of the structure formed by the multiple bent columns (2) to tighten and limit it. The second limiting structure (6) includes a pair of limiting rods that are hinged to each other in an X shape. The upper end of the limiting rod is hinged to the inner side of the upper end of the bent column (2) and its lower end is hinged to the inner side of the bottom of the adjacent bent column (2). The second support structure includes a main support column (7) and a buffer bent rod (8). The upper and lower ends of the single column (21) are provided with wedge-shaped surfaces, and the wedge-shaped surfaces of adjacent single columns (21) are opposite to each other and are arranged towards the axis of the base (1). A filler (22) is provided between the wedge-shaped surfaces of adjacent single columns (21). The filler (22) is an elastic filler and is bonded and fixed to the contact surface of the wedge-shaped surface. An elastic sealing member (23) is provided on the outside of the connection of adjacent single columns (21).

2. The safety device for facilitating the inspection of the roof of an elevator car according to claim 1, characterized in that The base (1) is provided with a movable groove (11) at the hinge point with the bent column (2).

3. The safety device for facilitating the inspection of the elevator car roof according to claim 1, characterized in that, The upper end of the abutment plate (24) is provided with a concave elastic buffer structure.

4. The safety device for facilitating the inspection of the elevator car roof according to claim 1, characterized in that, The main support column (7) is sleeved on the outside of the multiple sets of steel wire rope structures used for elevator car traction and fixed to the center of the base (1) by a fixing plate. Multiple buffer bends (8) with outward radial structure are arranged equidistantly along the side wall of the lower end of the main support column (7). The concave surface of the buffer bends (8) faces outward, and the bottom of the buffer bends (8) is connected to the base (1) by abutment plate (81).

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