A buffer protection device for personnel falling into a well and its implementation method

Abstract

The present invention relates to a buffering and protecting device for people falling into a shaft and an implementation method thereof, comprising a gas accumulator, a high-pressure gas delivery pipeline, a human infrared sensor, and a buffering and protecting structure. The gas accumulator is located in a machine room, and the gas accumulator supplies gas to the buffering and protecting structure through a high-pressure gas delivery pipeline. The human infrared sensor and the buffering and protecting structure are located on the shaft wall of each floor, and the buffering and protecting structure is arranged below the human infrared sensor. When a person falls into the shaft, the device can buffer and catch the falling person within the shortest height of the person's fall, effectively reducing the physical damage to the falling person, and in order to prevent the inflated airbag from failing to catch the person, the safety of the falling person can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator safety protection devices, in particular to a personnel falling-into-well buffering protection device and an implementation method thereof. Background Art

[0002] Looking back at various elevator safety accidents that have occurred in the past, people accidentally falling into the elevator shaft often occur. To prevent people from accidentally falling into the shaft, the "Safety Specifications for Elevator Manufacturing and Installation" already requires that a toe guard be installed below the car sill, and the height of the vertical portion of the toe guard should not be less than 0.75m. However, the car toe guard has certain limitations in preventing people from accidentally falling: when the elevator car sill is much higher than the floor door sill, the lower edge of the vertical portion of the car toe guard exceeds the floor door sill, and the car toe guard cannot completely close the floor door opening below the car sill, and cannot prevent people outside the car at that floor station or those climbing (jumping) out of the car from falling into the elevator shaft. In addition, the car toe guard also provides no protection when people accidentally fall into the shaft from other floors. Therefore, it is necessary to build a protective device into the shaft to cushion and catch the falling person when they accidentally fall into the shaft, reducing the harm to the body. Summary of the Invention

[0003] The purpose of the present invention is to provide a buffer protection device for people falling into the shaft and its implementation method, which can catch people who accidentally fall into the shaft and solve the problem of serious physical injuries caused to people when they accidentally fall into the shaft.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a buffering protection device for people falling into a shaft, a gas accumulator, a high-pressure gas transmission pipeline, a human infrared sensor, and a buffering protection structure. The gas accumulator is located in a machine room, and the gas accumulator supplies gas to the buffering protection structure through a high-pressure gas transmission pipeline. The human infrared sensor and the buffering protection structure are located on the shaft wall below each floor door, and the buffering protection structure is arranged below the human infrared sensor.

[0005] Furthermore, the buffer protection structure includes a telescopic bracket and an airbag. The gas accumulator supplies gas to the airbag through a high-pressure gas delivery pipeline. Four telescopic brackets are arranged on the shaft wall below each floor door. The four telescopic brackets are fixed on the shaft wall on both sides of the floor door. The airbag is located above the telescopic bracket and is fixedly connected to the telescopic bracket.

[0006] Furthermore, it also includes a pressure sensor for monitoring the gas pressure inside the gas accumulator and an air compression pump for inflating the gas accumulator.

[0007] Furthermore, the high-pressure gas delivery pipeline is fixed on the wellbore wall, and the high-pressure gas delivery pipeline is connected to the airbags on each layer through electromagnetic valves.

[0008] Furthermore, it also includes a protective net structure arranged on the shaft wall below each layer of the buffer protection structure.

[0009] Furthermore, the protective net structure includes a sliding track, a belt rod, and a protective net bag. The sliding track is located on the shaft walls on both sides below each floor door, and the sliding track is located below the telescopic bracket. Both ends of the belt rod are connected to pulleys, and the pulleys are located in the sliding track for sliding. One end of the protective net bag is fixed on the shaft wall below opposite the floor door, and the other end of the protective net bag is movably fixed on the belt rod. An electric latch is fixed on the shaft wall opposite the floor door in the sliding track, and a latch hole is provided on the side of the pulley close to the electric latch. Both ends of the belt rod are fixed with springs, and the other end of the spring is fixed on the shaft wall below the floor door. A limited opening is provided on the side of the sliding track close to the floor door.

[0010] Furthermore, the protective net structure includes a track groove, a belt rod, and a protective net bag. The track groove is located on the shaft walls on both sides below each floor door, and the track groove is located below the telescopic bracket. A motor is provided at one end of the track groove close to the floor door, and a threaded screw is fixed at the output end of the motor, and a threaded sleeve is provided on the fixed threaded screw. Both ends of the belt rod are on the threaded sleeves on both sides, one end of the protective net bag is fixed on the shaft wall below the opposite side of the floor door, and the other end of the protective net bag is movably fixed on the belt rod. An electric latch is fixed at the shaft wall close to the floor door in the track groove, and a latch hole is provided on the side of the threaded sleeve close to the electric latch.

[0011] Furthermore, the protective net bag is arranged on the shaft wall via a fixing belt.

[0012] A method for implementing a personnel falling-into-well buffer protection device comprises the following steps:

[0013] Step S1: When a person accidentally falls from the floor where the person is located into the shaft, the infrared sensor below the floor door of the floor where the person is located can sense the person falling and send a signal indicating the person falling to the control center in the machine room;

[0014] Step S2: After receiving the signal, the control center in the machine room triggers the two electromagnetic valves below the infrared sensor that senses a falling human body to activate. The gas accumulator then passes high-pressure gas through the high-pressure gas transmission pipeline into the airbags at the floor where the human body is located and the floor below the human body, causing the airbags to extend with the telescopic brackets and rapidly expand to fill the shaft. The control center in the machine room controls the protective net structure below the telescopic brackets at the floor where the human body is located and the floor below the human body to open, catching a human body that accidentally slips through the gaps between the airbags.

[0015] Step S3: The control center in the machine room controls to cut off the elevator safety circuit, making the elevator unable to run any more, avoiding interference between the car and the telescopic bracket and the airbag movement, and the control center in the machine room reminds the maintenance personnel of the person falling.

[0016] Furthermore, in step S2, a pressure sensor is provided in the gas accumulator. When the pressure sensor detects that the gas pressure inside the gas accumulator is low, the gas accumulator is inflated by an air compression pump.

[0017] Beneficial effects of the present invention: Through the device and implementation method of the present invention, an infrared sensor can be used to accurately identify whether a person has fallen into the shaft. When a person falls into the shaft, the falling person can be cushioned and caught within the shortest height of the person's fall, effectively reducing the physical damage to the falling person. In addition, in order to prevent the inflated airbag from failing to catch the person, the two airbags below the infrared sensor that identifies the human body will be inflated at the same time, so that when the first inflated airbag fails to catch the person, the second airbag can catch the falling person. The safety of the falling person can be guaranteed, and the protective net structure can be used to open the protective net under the airbag when the airbag is opened, so as to catch a person who accidentally slips from the airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 A cross-sectional view of a top view of the present invention;

[0020] Figure 3 is a schematic diagram of the inflation of the airbag of the present invention;

[0021] Figure 4 Schematic diagram of the structure of the first embodiment of the protection structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the first embodiment of the protection structure of the present invention as viewed from above;

[0023] Figure 6 is a schematic structural diagram of a second embodiment of the protection structure of the present invention;

[0024] Figure 7 This is a schematic diagram of the top view of the first embodiment of the protective structure of the present invention, in which the rod is located in the limiting opening.

[0025] Among them: 1. Gas accumulator, 2. High-pressure gas transmission pipeline, 3. Human infrared sensor, 4. Airbag, 5. Telescopic bracket, 6. Landing door, 7. Traction machine, 8. Machine room, 9. Wire rope, 10. Hoistway wall, 11. Car, 12. Counterweight, 13. Counterweight running guide rail, 14. Protective net structure, 15. Sliding track, 16. Belt rod, 17. Protective net bag, 18. Pulley, 19. Electric latch, 20. Limiting mouth, 21. Spring, 22. Track groove, 23. Motor, 24. Threaded screw, 25. Threaded bushing, 26. Latch hole, 27. Fixing belt. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] See also Figures 1 to 7The present invention provides an embodiment: a shaft protection device for preventing people from falling, comprising a gas accumulator 1, a high-pressure gas pipeline 2, a human infrared sensor 3, and a buffer protection structure. The gas accumulator 1 is located in a machine room 8 and supplies gas to the buffer protection structure through the high-pressure gas pipeline 2. The human infrared sensor 3 and the buffer protection structure are located on a shaft wall 10 below each floor door 6, with the buffer protection structure positioned below the human infrared sensor 3. The elevator car 11 is suspended by a steel wire rope 9, one end of which is connected to the car 11 and the other end to the counterweight 12. The counterweight 12 runs on a counterweight running guide rail 13. Therefore, part of the steel wire rope 9 in the shaft is on the car 11 side and part is on the counterweight 12 side. The counterweight 12 and the car 11 are at either end of the steel wire rope 9, and the steel wire rope 9 rotates on the traction sheave due to friction. If the car 11 moves upward, the counterweight 12 moves downward. The counterweight 12 increases the friction of the wire rope 9 while also balancing the weight of the car 11 and reducing the load on the motor. When the car 11 is stationary, the counterweight 12 is also stationary; when the car 11 moves, the counterweight 12 moves in the opposite direction, both of which move vertically within the hoistway. One side of the hoistway wall 10 provides space for the counterweight 12, while the other two sides of the hoistway wall 10 form spaces for the human infrared sensor 3 and the buffer protection structure. A gas accumulator 1 is fixed to the machine room 8 and filled with high-pressure gas. High-pressure gas delivery pipes 2 rapidly inflate each buffer protection structure, causing the gas accumulator 1 to expand within the hoistway. A human infrared sensor 3 is located on the hoistway wall 10 below each landing door 6 to detect the floor from which a person has fallen. When the human infrared sensor 3 detects a person falling into the hoistway, it triggers the gas accumulator 1 at the two landings below it to supply air to the buffer protection structure, causing it to expand within the hoistway. If the buffer protection structure is not triggered and expands, it will not interfere with the operating space of the car 11. When the infrared sensor is triggered, the two lower floors will expand at the same time for safety reasons to prevent the upper floor from failing to catch the falling person. The buffer protection structure of the lower floor can then catch the falling person. For example: a person falls from the floor door 6 of the 10th floor. The human infrared sensor 3 on the shaft wall 10 below the floor door 6 senses the person falling, triggering the gas accumulator 1 on the 9th and 8th floors below the floor to supply air to the buffer protection structure, causing the buffer protection structures on both floors to expand. To catch the person who falls in the shaft, when the switch connecting the gas accumulator 1 to the buffer protection structure is triggered, the traction machine 7 that serves as the power of the elevator will stop operating, cutting off the elevator safety circuit, making it impossible for the elevator to continue running, avoiding interference between the movement of the car 11 and the buffer protection structure, and at the same time reminding maintenance personnel that a person has fallen.At the same time, when the maintenance personnel switches the elevator to the maintenance state through the switch on the car top, all human infrared sensors 3 will lose their function, which makes it convenient for the maintenance personnel to stand on the car top and maintain the shaft equipment as the elevator runs.

[0028] Please continue reading Figures 2 to 3 As shown, in one embodiment of the present invention, the buffer protection structure includes a telescopic bracket 5 and an airbag 4. The gas accumulator 1 supplies gas to the airbag 4 through a high-pressure gas transmission pipe 2. The telescopic bracket 5 is fixed to the shaft wall 10. Four telescopic brackets 5 are provided on the shaft wall 10 below each floor door 6. The four telescopic brackets 5 are fixed to the shaft wall 10 on both sides of the floor door 6. The airbag 4 is fixedly connected to the telescopic bracket 5. Under normal circumstances, the airbag 4 at each floor station is in a retracted and folded state, and the telescopic bracket 5 is also in a retracted state, and does not interfere with the operating space of the car 11 and the operating space of the counterweight 12. Figure 2 As shown. The counterweight 12 and the car 11 are at the two ends of the wire rope 9, and the wire rope 9 rotates on the traction sheave due to friction (you can imagine the traction sheave as a fixed pulley). If the car 11 runs upward, the counterweight 12 runs downward. The function of the counterweight 12 is to increase the friction of the wire rope 9, while also balancing the weight of the car 11 and reducing the load on the motor. When the car 11 is stationary, the counterweight 12 is also stationary; when the car 11 moves, the counterweight 12 moves in the opposite direction. They all move vertically in the hoistway. When a person falls, the electromagnetic valves connecting the airbags 4 and the high-pressure gas transmission pipeline 2 at the two floors below the floor where the person fell are triggered, causing the airbags 4 to inflate rapidly. The unfolded shape of the airbag 4 is designed according to the cross-sectional space of the shaft. When the airbag 4 is unfolded, it should be able to fill the entire cross-sectional area of the shaft. The expansion and unfolding of the airbag 4 drives the telescopic bracket 5 to extend. After the airbag 4 is expanded and unfolded, it fills the entire cross-sectional area of the shaft to support and cushion the falling person and prevent the person from continuing to fall. The extended telescopic bracket 5 provides support for the unfolded airbag 4 and can effectively support the falling person and the weight of the airbag 4.

[0029] Please continue reading Figures 1 to 3 As shown, in one embodiment of the present invention, a pressure sensor for monitoring the gas pressure inside the gas accumulator 1 and an air compression pump for inflating the gas accumulator 1 are further included. The gas accumulator 1 is equipped with the pressure sensor and the air compression pump. When the pressure sensor detects that the gas pressure inside the gas accumulator 1 is low, the air compression pump automatically inflates the gas accumulator 1.

[0030] Please continue reading Figure 1As shown, in one embodiment of the present invention, the high-pressure gas delivery pipeline 2 is fixed to the shaft wall 10 and connected to the airbags 4 on each floor via electromagnetic valves. The human infrared sensor 3 is electrically connected to the electromagnetic valves. The electromagnetic valves control whether the gas accumulator 1 can supply gas to the airbags 4 on each floor. The electromagnetic valves are triggered to open only when the human infrared sensor 3 detects a person falling.

[0031] Please continue reading Figure 1 As shown, one embodiment of the present invention further includes a protective net structure 14 disposed on the shaft wall below each layer of the buffer protection structure. The purpose of the protective net structure 14 is to prevent the possibility of a person slipping through the gap in the airbag 4 when the airbag 4 catches the person, as the support surface of the telescopic bracket 5 is limited. Therefore, the protective net structure 14 is required. If a person accidentally falls through the weak point of the gap in the airbag 4, the protective net structure 14 can be used to catch the person, providing secondary protection.

[0032] Please continue reading Figure 4 、 Figure 5 、 Figure 7 As shown, in one embodiment of the present invention, the protection net structure 14 includes a sliding rail 15, a belt rod 16, and a protection net bag 17. The sliding rail 15 is located on the shaft wall 10 on both sides below each floor door 6, and the sliding rail 15 is located below the telescopic bracket 5. Both ends of the belt rod 16 are connected to pulleys 18, and the pulley 18 is located in the sliding rail 15 for sliding. One end of the protection net bag 17 is fixed on the shaft wall 10 below the floor door 6, and the other end of the protection net bag 17 is movably fixed on the belt rod 16. An electric latch 19 is fixed in the sliding rail 15 at the shaft wall 10 opposite the floor door 6, and a latch hole 26 is provided on the side of the pulley 18 close to the electric latch 19. Springs 21 are fixed at both ends of the belt rod 16, and the other end of the spring 21 is fixed on the shaft wall 10 below the floor door 6. A limited opening 20 is provided on the side of the sliding rail 15 close to the floor door 6. When the human infrared sensor 3 senses a falling human body, the protective net structure 14 can open the protective net bag 17 to catch the human body that may have slipped down from the gap of the air bag 4 after the air bag 4 has already caught the human body. The protective net structure can be arranged as follows: Figure 5As shown, the electric latch 19 is controlled by the control center of the machine room 8. When the infrared sensor senses that a human body has fallen, the latch on the electric latch 19 at the telescopic bracket 5 of the control station and the station below the station where the human body is located is retracted, and the belt rod 16 will be driven by the elastic force of the spring 21 to slide in the sliding track 15. When the belt rod 16 engages the limit opening 20, it will fall into the limit opening 20. While the belt rod 16 opens the protective net bag 17, it will also limit the belt rod 16 to prevent the belt rod 16 from rebounding and causing the protective net bag 17 to fail to catch the person.

[0033] Please continue reading Figure 6 As shown, in one embodiment of the present invention, the protection net structure 14 includes a track groove 22, a belt rod 16, and a protection net bag 17. The track groove 22 is located on the shaft wall 10 on both sides below each floor door 6, and the track groove 22 is located below the telescopic bracket 5. A motor 23 is provided at one end of the track groove 22 close to the floor door 6, and a threaded screw rod 24 is fixed at the output end of the motor 23. A threaded sleeve 25 is provided on the fixed threaded screw rod 24. Both ends of the belt rod 16 are on the threaded sleeves 25 on both sides. One end of the protection net bag 17 is fixed on the shaft wall 10 below the opposite side of the floor door 6, and the other end of the protection net bag 17 is movably fixed on the belt rod 16. An electric latch 19 is fixed at the shaft wall 10 close to the floor door 6 in the track groove 22, and a latch hole is provided on the surface of the threaded sleeve 25 close to the electric latch 19. When the human infrared sensor 3 senses that a human body has fallen, the control center of the machine room 8 triggers the motor 23 to operate, driving the threaded sleeve 25 to drive the belt rod 16 to move on the threaded screw 24, thereby opening the protective net bag 17, and the control center of the machine room 8 triggers the electric bolt 19 to operate with a delay time. The specific time is related to the electric bolt 19 being set with the position of the threaded sleeve 25 and the electric bolt 19 and the speed of the motor 23. However, when the threaded sleeve 25 moves to the front position of the electric bolt 19, the electric bolt 19 is triggered to operate and fix the position of the strip steel that has been opened by the protective net bag 17, thereby preventing the strip steel from retracting due to the downward kinetic energy of the human body after the strip steel is caught by the belt rod 16, and protecting the motor 23.

[0034] Please continue reading Figure 4 As shown, in one embodiment of the present invention, the protective net bag 17 is set on the shaft wall 10 via a fixing belt 27. The fixing belt 27 can limit the protective net bag 17 on the shaft wall 10 to prevent the protective net bag 17 from fluttering due to the pressure difference when the car 11 moves up and down, and will not affect the movement of the car 11.

[0035] See also Figures 1 to 7 The present invention provides another embodiment: a method for implementing a personnel falling shaft buffer protection device, comprising the following steps:

[0036] Step S1: When a person accidentally falls from the floor where the person is located into the shaft, the high-pressure gas transmission pipe 3 below the floor door 6 of the floor where the person is located can sense the person's fall and send a signal of the person falling to the control center in the machine room 7;

[0037] In step S2, after receiving the signal, the control center of the machine room 7 controls the two electromagnetic valves below the high-pressure gas delivery pipe 3 that sense the human body falling to trigger and start, and the gas accumulator 1 passes the high-pressure gas through the high-pressure gas delivery pipe 2 into the airbags 4 of the two floors where the human body is located and the floor below the human body, so that the airbags 4 and the telescopic brackets 5 are extended and rapidly expand to fill the shaft; the control center of the machine room 8 controls the protective net structure 14 below the telescopic brackets 5 of the floor where the body is located and the floor below the human body to open, so as to catch the human body that accidentally slips through the gap between the airbags 4; the opening of the protective net structure 14 can be shown in the figure. When the human body sensor senses that the human body has fallen into the shaft, the electric bolt 19 is controlled to retract, and the belt rod 16 will be driven by the elastic force of the spring 21 to slide in the sliding track 15. When the belt rod 16 engages the limit opening 20, it will fall into the limit opening 20. While the belt rod 16 opens the protective net, it also limits the belt rod 16 to prevent rebound.

[0038] In step S3, the control center in the machine room 7 controls the closure of the elevator's safety circuit, disabling elevator operation and preventing interference between the car 11 and the telescopic support 5 and airbag 4. The control center in the machine room 7 then alerts maintenance personnel of a potential fall. The present invention's method accurately detects whether a person has fallen into the hoistway using infrared sensors. The control center in the machine room 7 then inflates the two layers of airbags 4 below the high-pressure gas delivery pipes 3 on that level to catch a falling person. The elevator is then stopped, preventing any secondary injuries to a falling person. When maintenance personnel switch the elevator to maintenance mode using a switch on the car roof, all high-pressure gas delivery pipes 3 are deactivated, allowing them to stand on the car roof and perform maintenance on hoistway equipment. When the high-pressure gas delivery pipes 3 are activated, they simultaneously sever the elevator's safety circuit, disabling further elevator operation and preventing interference between the car 11 and the telescopic support 5 and airbag 4. The system also alerts maintenance personnel of a potential fall.

[0039] Please continue reading Figure 1As shown, in another embodiment of the present invention, in step S2, the gas accumulator 1 is equipped with a pressure sensor. When the pressure sensor detects low gas pressure within the gas accumulator 1, an air compressor pump automatically inflates the gas accumulator 1. The gas accumulator 1 is equipped with a pressure sensor and an air compressor pump. When the pressure sensor detects low gas pressure within the gas accumulator 1, the air compressor pump automatically inflates the gas accumulator 1. This prevents insufficient compressed gas within the gas accumulator 1 from inflating the airbag 4 in the event of an accident.

[0040] The present invention has the following working principle: the infrared sensor can sense the falling of a human body and serve as a starting device to trigger the expansion of the airbag. When the infrared sensor senses the falling of a human body, it sends a signal to the control center of the machine room, and then opens the control electromagnetic valve to allow the gas in the gas accumulator to enter the airbag, so that the airbag can expand quickly to catch the falling human body. In addition, the protective net structure can be used to open the protective net under the airbag when the airbag is opened, so as to catch the human body that accidentally slips from the airbag.

[0041] The above description is only a preferred embodiment of the present invention and should not be understood as limiting the present application. All equivalent changes and modifications made within the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A buffer protection device for personnel falling into a shaft, characterized by: A gas accumulator, a high-pressure gas delivery pipeline, a human infrared sensor, and a buffer protection structure. The gas accumulator is located in the machine room and supplies gas to the buffer protection structure through the high-pressure gas delivery pipeline. The human infrared sensor and the buffer protection structure are located on the shaft wall below each floor door, and the buffer protection structure is arranged below the human infrared sensor. The buffer protection structure includes a telescopic bracket and an airbag. The gas accumulator supplies gas to the airbag through a high-pressure gas transmission pipeline. Four telescopic brackets are provided on the shaft wall below each landing door. The four telescopic brackets are fixed to the shaft wall on both sides of the landing door. The airbag is located above the telescopic bracket and is fixedly connected to the telescopic bracket. Also included is a pressure sensor for monitoring the gas pressure inside the gas accumulator and an air compression pump for charging the gas accumulator; It also includes a protective net structure provided on the shaft wall below the buffer protection structure of each layer; The protective net structure includes a sliding track, a belt rod, and a protective net bag. The sliding track is located on the wellbore walls on both sides below each floor door, the sliding track is located below the telescopic bracket, both ends of the belt rod are connected to pulleys, and the pulleys are located in the sliding track for sliding, one end of the protective net bag is fixed on the wellbore wall below opposite the floor door, and the other end of the protective net bag is movably fixed on the belt rod, an electric latch is fixed on the wellbore wall opposite the floor door in the sliding track, a latch hole is provided on the side of the pulley close to the electric latch, springs are fixed on both ends of the belt rod, the other end of the spring is fixed on the wellbore wall below the floor door, and a limited opening is provided on the side of the sliding track close to the floor door.

2. The device for protecting personnel from falling into a shaft according to claim 1, characterized in that: The high-pressure gas delivery pipeline is fixed on the well wall, and the high-pressure gas delivery pipeline is connected to the airbags on each layer through electromagnetic valves.

3. The device for protecting personnel from falling into a shaft according to claim 1, characterized in that: The protective net structure includes a track groove, a belt rod, and a protective net bag. The track groove is located on the shaft walls on both sides below each floor door, and the track groove is located below the telescopic bracket. A motor is provided at one end of the track groove close to the floor door, and a threaded screw is fixed at the output end of the motor, and a threaded shaft sleeve is provided on the fixed threaded screw rod. Both ends of the belt rod are on the threaded shaft sleeves on both sides, one end of the protective net bag is fixed on the shaft wall below the opposite side of the floor door, and the other end of the protective net bag is movably fixed on the belt rod. An electric latch is fixed at the shaft wall close to the floor door in the track groove, and a latch hole is provided on the side of the threaded shaft sleeve close to the electric latch.

4. A buffering and protecting device for personnel falling into a shaft according to claim 1 or 3, characterized in that: The protective net bag is arranged on the shaft wall via a fixing belt.

5. A method for implementing the personnel falling into the shaft buffer protection device according to claim 1, characterized in that: The following steps are involved: Step S1: When a person accidentally falls from the floor where the person is located into the shaft, the infrared sensor below the floor door of the floor where the person is located can sense the person falling and send a signal indicating the person falling to the control center in the machine room; Step S2: After receiving the signal, the control center in the machine room triggers the two electromagnetic valves below the infrared sensor that senses a falling human body to activate. The gas accumulator then passes high-pressure gas through the high-pressure gas transmission pipeline into the airbags at the floor where the human body is located and the floor below the human body, causing the airbags to extend with the telescopic brackets and rapidly expand to fill the shaft. The control center in the machine room controls the protective net structure below the telescopic brackets at the floor where the human body is located and the floor below the human body to open, catching a human body that accidentally slips through the gaps between the airbags. Step S3: The control center in the machine room controls to cut off the elevator safety circuit, making the elevator unable to run any more, avoiding interference between the car and the telescopic bracket and the airbag movement, and the control center in the machine room reminds the maintenance personnel of the person falling.

6. The method for implementing the buffer protection device for personnel falling into a shaft according to claim 5 is characterized in that: In step S2, a pressure sensor is provided in the gas accumulator. When the pressure sensor detects that the gas pressure inside the gas accumulator is low, the gas accumulator is inflated by an air compression pump.

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