Fall protection device
By installing fall protection devices on the elevator maintenance platform and using cable limits and acceleration sensors to monitor, the problems of elevator maintenance personnel falling and single-person operations are solved, achieving safety protection and timely alarm effects.
Patent Information
- Application Number
- CN202421769666.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-07-25
AI Technical Summary
When the elevator maintenance personnel work on the maintenance platform, due to the risk of the gap between the elevator car and the elevator shaft, they are prone to fall and fall into the elevator shaft, and the danger of no one to rescue them during a single operation cannot be discovered in time.
A fall protection device is designed, including a base, a fixed shaft, a rotating plate, a spring balancer and a steel cable. The cable limit is used to maintain personnel, combine an acceleration sensor to monitor the fall, and issue acoustic and optical alarms and transmit alarm information in the event of danger.
Effectively prevent maintenance personnel from falling due to falls, ensure safety, and promptly remind colleagues to rescue and notify monitoring personnel when danger occurs, so as to avoid the problem of no one to rescue during single operation.
Smart Images
Figure CN223117869U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of labor protection articles, in particular to a fall protection device. Background Art
[0002] As an indispensable means of transportation in modern urban life, elevators provide people with a convenient and fast vertical transportation method. However, with the increasing frequency of elevator use, its maintenance becomes particularly important. For example, elevator guide rails bear the weight of the elevator, so they are prone to wear and corrosion. Maintenance personnel need to regularly clean the surface of the guide rails to ensure they are smooth and flat, avoiding noise and damage caused by friction.
[0003] In the prior art, in order to facilitate the work of maintenance personnel, a maintenance platform is often erected on the top of the elevator car. Maintenance personnel need to stand on the top of the elevator car to work. Due to the influence of the elevator structure, there is a gap between the elevator car and the elevator shaft. Therefore, when maintenance personnel are performing elevator maintenance work, there is a risk of falling from the maintenance platform.
[0004] Therefore, we designed a fall protection device to prevent the problem that maintenance personnel accidentally fall from the elevator shaft when working on the maintenance platform. Content of the Utility Model
[0005] The purpose of the utility model is to solve the problem in the prior art that due to the influence of the elevator structure, there is a gap between the elevator car and the elevator shaft. Therefore, when maintenance personnel are performing elevator maintenance work, there is a risk of falling from the maintenance platform and falling into the elevator shaft, and a fall protection device is proposed.
[0006] To achieve the above purpose, the utility model adopts the following technical scheme: a fall protection device, including a base and a maintenance platform bottom plate at the top of the elevator fixed and clamped at the bottom of the base. A fixed shaft is welded on the top of the base, and a partition ring is welded on the outer side of the middle of the fixed shaft. Both ends of the fixed shaft are movably sleeved with rotating plates, and spring balancers are fixedly installed on the upper surfaces of the two rotating plates through bolts. A steel cable is wound around the spring balancer, and one end of the steel cable is fixedly connected with a buckle. One end of the spring balancer is fixedly installed with a right-angle elbow pipe, and an acceleration sensor is installed in the right-angle elbow pipe. The steel cable passes through the right-angle elbow pipe and extends out of the spring balancer.
[0007] Preferably, a power supply is fixedly installed on the rotating plate, and the power supply is electrically connected with the acceleration sensor through a wire.
[0008] Preferably, a cover is threadedly connected to the top of the fixed shaft, and the bottom outer edge of the cover is pressed against the upper surface of one end of the rotating plate at the top.
[0009] Preferably, bearings are sleeved on the outer walls of both ends of the fixed shaft, and the outer walls of the two bearings are respectively inserted into one ends of the two rotating plates.
[0010] Preferably, limit rings are welded on the upper surfaces of the two rotating plates, and the bottoms of the spring balancers are inserted into the limit rings.
[0011] Preferably, an alarm is fixedly installed on the top of the cover, and the alarm is electrically connected to the power supply through a wire.
[0012] Preferably, four right-angled sheet metal parts are bent at the edge of the base, and the four right-angled sheet metal parts penetrate through the bottom plate of the maintenance platform.
[0013] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:
[0014] 1. In the present utility model, when a maintenance personnel is tripped, after the body leans forward, it will be pulled by the steel cable after being limited, preventing further falling actions, thereby avoiding the problem that the maintenance personnel falls into the elevator shaft due to falling, and the heights of the two rotating plates are different and can both rotate around the fixed shaft, so as to meet the needs of two maintenance personnel working on the maintenance platform at the same time.
[0015] 2. In the present utility model, an acceleration sensor is installed in the right-angled elbow pipe, which can always monitor the telescopic speed of the steel cable. When a falling situation occurs, because the pulling force on the steel cable increases and the acceleration exceeds the threshold, the control alarm not only issues a sound and light alarm to remind the accompanying personnel to rescue quickly, but also transmits the alarm information to the monitoring personnel at the background, preventing the problem that there is no one to rescue at the scene after a danger occurs during single-person operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is the front view of a fall protection device proposed by the present utility model;
[0017] Figure 2 is the partial structural sectional view of a fall protection device proposed by the present utility model;
[0018] Figure 3 is the three-dimensional structural schematic diagram of the rotating plate of a fall protection device proposed by the present utility model;
[0019] Figure 4 is the three-dimensional structural schematic diagram of a fall protection device proposed by the present utility model.
[0020] Legend: 1. Fixed shaft; 10. Partition ring; 11. Cover; 2. Rotating plate; 20. Limit ring; 21. Bearing; 3. Spring balancer; 4. Right-angled elbow pipe; 5. Steel cable; 6. Buckle; 7. Alarm; 8. Power supply; 80. Wire; 9. Base; 90. Bottom plate of the maintenance platform. Detailed implementation mode
[0021] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.
[0022] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the present invention is not limited by the specific embodiments disclosed in the following specification.
[0023] Embodiment 1
[0024] As Figures 1-4 shown, the present invention provides a fall protection device, including a base 9 and a maintenance platform bottom plate 90 at the top of the elevator fixedly clamped at the bottom of the base 9. Four right-angled sheet metal parts are bent at the edge of the base 9, and the four right-angled sheet metal parts penetrate through the maintenance platform bottom plate 90. Bolts are inserted into the part of the right-angled sheet metal part inserted into the bottom of the maintenance platform bottom plate 90, so that the base 9 can be firmly installed on the maintenance platform bottom plate 90. The maintenance platform bottom plate 90 is a metal plate member added to the top of the elevator car, and a circle of protective fences is also welded outside the maintenance platform.
[0025] A fixed shaft 1 is welded on the top of the base 9, and a partition ring 10 is welded on the outer side of the middle of the fixed shaft 1. Rotating plates 2 are movably sleeved at both ends of the fixed shaft 1. The partition ring 10 is an isolation space between the two rotating plates 2 to prevent the two rotating plates 2 from directly contacting, because the two rotating plates 2 can rotate around the fixed shaft 1 as the rotation axis respectively. Spring balancers 3 are fixedly installed on the upper surfaces of the two rotating plates 2 by bolts. Steel cables 5 are wound around the spring balancers 3, and one end of the steel cable 5 is fixedly connected with a buckle 6. One end of the spring balancer 3 is fixedly installed with a right-angled elbow 4, and an acceleration sensor is installed in the right-angled elbow 4. The steel cable 5 passes through the right-angled elbow 4 and extends out of the spring balancer 3. Bearings 21 are sleeved on the outer walls of both ends of the fixed shaft 1, and the outer walls of the two bearings 21 are respectively inserted into one ends of the two rotating plates 2. Limit rings 20 are welded on the upper surfaces of the two rotating plates 2, and the bottoms of the spring balancers 3 are inserted into the limit rings 20.
[0026] The specific settings and functions of this embodiment are described below: When maintenance personnel need to board the maintenance platform on the top of the elevator car, they pull out the steel cable 5 on the spring balancer 3 and install the buckle 6 at one end of the steel cable 5 on the anti-fall waist belt they are wearing. The spring balancer 3 uses an internal spring and a sliding device to provide a constant tension, similar to a tape measure structure, which can automatically retract the unloaded steel cable 5, facilitating the daily storage of this device. The length of the steel cable 5 in the spring balancer 3 can be limited according to the working range of the maintenance platform. For example, if this device is installed at the center of the bottom plate 90 of the maintenance platform and the distance from this position to the wall of the elevator shaft is 2m, then the maximum extended length of the limit steel cable 5 is 2m. When the maintenance personnel are tripped, their bodies will be pulled by the limited steel cable 5 after leaning forward, preventing further falling actions, thus avoiding the problem of maintenance personnel falling into the elevator shaft due to falling. At the same time, an acceleration sensor is installed in the right-angle elbow 4, which can continuously monitor the telescopic speed of the steel cable 5. When a falling situation occurs, because the tension on the steel cable 5 increases and the acceleration exceeds the threshold, the alarm 7 is controlled to emit an audible and visual alarm to remind the accompanying personnel to rescue quickly.
[0027] Embodiment 2
[0028] As Figures 1-4 shown, a power supply 8 is fixedly installed on the rotating plate 2, and the power supply 8 is electrically connected to the acceleration sensor through a wire 80. An alarm 7 is fixedly installed on the top of the cover 11, and the alarm 7 is electrically connected to the power supply 8 through a wire 80; the power supply 8 is used to supply power to the alarm 7 and the acceleration sensor. After its power is low, it can continue to work by replacing the battery. When a falling situation occurs, because the tension on the steel cable 5 increases and the acceleration exceeds the threshold, the alarm 7 is controlled to not only emit an audible and visual alarm to remind the accompanying personnel to rescue quickly, but also transmit the alarm information to the monitoring personnel in the background, preventing the problem that there is no one to rescue on the spot when a danger occurs during single-person operation.
[0029] The usage method and working principle of this device: When maintenance personnel need to board the maintenance platform on the top of the elevator car, they pull out the steel cable 5 on the spring balancer 3 and install the buckle 6 at one end of the steel cable 5 on the anti-fall waist belt they are wearing. The spring balancer 3 uses an internal spring and a sliding device to provide a constant tension, similar to a tape measure structure, which can automatically retract the unloaded steel cable 5, facilitating the daily storage of this device.
[0030] According to the working range of the maintenance platform, the length of the steel cable 5 in the spring balancer 3 can be limited. For example, if this device is installed at the center position of the bottom plate 90 of the maintenance platform and the distance from this position to the wall of the elevator shaft is 2 m, then the maximum extended length of the limit steel cable 5 is 2 m. When the maintenance personnel are tripped, the body will lean forward and then be pulled by the limited steel cable 5 to prevent further falling actions, thus avoiding the problem that the maintenance personnel fall into the elevator shaft due to falling. At the same time, an acceleration sensor is installed in the right-angle elbow 4, which can monitor the telescopic speed of the steel cable 5 at all times. When a falling situation occurs, because the tension on the steel cable 5 increases and the acceleration exceeds the threshold, the control alarm 7 not only issues an audible and visual alarm to remind the accompanying personnel to rescue quickly, but also transmits the alarm information to the monitoring personnel in the background, preventing the problem that there is no one to rescue at the scene when a danger occurs during single-person operation.
[0031] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims
1. A fall protection device, comprising a base (9) and a maintenance platform bottom plate (90) at the top of an elevator fixedly clamped to the bottom thereof, characterized in that: A fixed shaft (1) is welded to the top of the base (9), and a partition ring (10) is welded to the outer side of the middle of the fixed shaft (1). Both ends of the fixed shaft (1) are movably sleeved with rotating plates (2), and spring balancers (3) are fixedly installed on the upper surfaces of the two rotating plates (2) by bolts. A steel cable (5) is wound around the spring balancer (3), and one end of the steel cable (5) is fixedly connected to a buckle (6). One end of the spring balancer (3) is fixedly installed with a right-angle elbow (4), and an acceleration sensor is installed in the right-angle elbow (4). The steel cable (5) passes through the right-angle elbow (4) and extends out of the spring balancer (3).
2. The fall protection device according to claim 1, wherein: A power supply (8) is fixedly installed on the rotating plate (2), and the power supply (8) is electrically connected to the acceleration sensor through a wire (80).
3. The fall prevention device according to claim 2, wherein: A cover (11) is threadedly connected to the top of the fixed shaft (1), and the bottom outer edge of the cover (11) is crimped on the upper surface of one end of the rotating plate (2) located at the top.
4. The fall protection device according to claim 1, characterized in that: Bearings (21) are sleeved on the outer walls of both ends of the fixed shaft (1), and the outer walls of the two bearings (21) are respectively inserted into one ends of the two rotating plates (2).
5. The fall protection device according to claim 1, wherein: Limit rings (20) are welded to the upper surfaces of the two rotating plates (2), and the bottoms of the spring balancers (3) are inserted into the limit rings (20).
6. The fall protection device according to claim 3, wherein: An alarm (7) is fixedly installed on the top of the cover (11), and the alarm (7) is electrically connected to the power supply (8) through a wire (80).
7. The fall protection device according to claim 1, characterized in that: Four right-angle sheet metal parts are bent at the edge of the base (9), and the four right-angle sheet metal parts penetrate through the maintenance platform bottom plate (90).