An accidental fall protection structure for personnel in the elevator pit

Abstract

The present invention belongs to the technical field of building construction, and particularly relates to a protection structure for accidental fall of personnel in an elevator pit, including a silk safety net and a frame a arranged at the edge of the silk safety net. A plurality of infrared sensors are inclinedly installed on the upper surface of the frame a, and the emitted light beams of the infrared sensors are all projected onto the upper wall of the elevator shaft. A controller connected to the infrared sensors is arranged on the frame a. A lifting mechanism is arranged on the lower surface of the frame a, and a metal safety net connected to the lifting mechanism is arranged below the frame a. A triggering member is arranged inside the metal safety net; the triggering member includes an airbag assembly installed in the middle of the metal safety net, and sponge columns are installed in the holes of the metal safety net, and both ends of the sponge columns respectively extend out of the holes of the metal safety net. The present invention can reduce the distance between the two safety nets as the falling height of the personnel increases, and leave enough distance between the two safety nets to prevent the silk safety net from catching the falling personnel.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and particularly relates to a protection structure for accidental fall of personnel in an elevator pit. Background Art

[0002] With the construction of high-rise buildings, elevators have become increasingly popular in various cities. People's awareness of using elevators safely needs to be strengthened, especially for children. When playing in the corridor, they may occasionally open the elevator door, which is very likely to fall into the elevator shaft and cause accidents. During the construction of the elevator shaft, it is necessary to install a fall prevention net.

[0003] When installing a fall prevention net in an existing elevator shaft, generally, a metal frame is used to support the edge of the fall prevention net. The metal frame is fixed to the lower part of the elevator shaft through wall-piercing nails and is suspended at a certain height to leave a safety space for compression deformation.

[0004] During the fall prevention process of the fall prevention net, in order to improve the protection performance, generally, a second layer of fall prevention net is added. However, the distance between the double-layer fall prevention nets is not convenient to adjust. If the distance is too large, it is easy to hinder the operation of the elevator. If the distance is too small, the upper fall prevention net is easily locally broken under pressure, and the broken part may catch the limbs of the falling personnel, causing poor blood circulation. Therefore, we propose a protection structure for accidental fall of personnel in an elevator pit. Summary of the Invention

[0005] The purpose of the invention is to provide a protection structure for accidental fall of personnel in an elevator pit, which can reduce the distance between the two safety nets as the falling height of the personnel increases, and leave enough distance between the two safety nets to prevent the silk safety net from catching the falling personnel.

[0006] The technical solution adopted by the invention is specifically as follows:

[0007] A protection structure for accidental fall of personnel in an elevator pit includes a silk safety net and a frame a arranged at the edge of the silk safety net. A plurality of infrared sensors are obliquely installed on the upper surface of the frame a, and the emitted light beams of the infrared sensors are all projected onto the upper wall of the elevator shaft. A controller connected to the infrared sensors is arranged on the frame a. A lifting mechanism is arranged on the lower surface of the frame a. A metal safety net connected to the lifting mechanism is arranged below the frame a. A triggering member is arranged inside the metal safety net;

[0008] The trigger includes an airbag assembly installed in the middle of the metal safety net. Sponge columns are installed in the holes of the metal safety net, and both ends of the sponge columns extend out of the holes of the metal safety net. During operation, when a person falling signal is detected by multiple infrared sensors and a person falls from the second floor, the silk safety net will be broken and the person will land on the metal safety net. The sponge columns are used for buffering. When falling from above the third floor, the lifting mechanism raises the metal safety net. The height of the metal safety net lifted increases with the height of the person's fall, and the distance between the two safety nets can be reduced as the height of the person's fall increases. Moreover, enough distance is left between the two safety nets to prevent the silk safety net from catching the falling person. Both the silk safety net and the metal safety net are close to the bottom of the elevator shaft pit and will not hinder the operation of the elevator. And the falling person triggers the airbag assembly, and the inflated airbag assembly is used for further buffering to provide further protection for the falling person.

[0009] The lifting mechanism includes a plurality of electric telescopic rods fixedly installed on the lower surface of frame a. The output ends of the electric telescopic rods all extend vertically downward and a frame b is fixedly installed between them. Both frame b and frame a are in a concave structure and have the same opening direction. The inner side of frame b is fixedly connected to the edge of the metal safety net. When the output ends of the electric telescopic rods extend, frame b and the metal safety net can be lowered. On the contrary, when the output ends of the electric telescopic rods shorten, frame b and the metal safety net can be lifted.

[0010] A coaxial flange ring is adhesively bonded to the outside of the airbag assembly. The outside of the flange ring is embedded in the middle of the metal safety net and its upper edge is turned outwards to provide protection outside the airbag assembly and prevent the metal safety net from cutting the airbag assembly when pressed by the falling person.

[0011] A leather sleeve is adhesively bonded between the upper surfaces of the sponge columns. A round hole is opened in the middle of the leather sleeve and the upper end of the airbag assembly passes through this round hole to strengthen the connection between the sponge columns and provide protection in the gaps between the sponge columns, separating the falling person from the metal safety net and preventing the falling person from contacting the metal safety net.

[0012] A hole is opened in the middle of the silk safety net to facilitate the safety clamp at the bottom of the elevator car to pass through, and a safety distance of 100 - 200 mm is left between the silk safety net and the bottom of the elevator car.

[0013] A rubber band is adhesively bonded to the edge of the hole. The rubber band is in a ring structure to strengthen the position of the silk safety net at the edge of the hole, relieve the surface tension of the silk safety net, and prevent it from being broken by the airflow brought by the elevator's descent.

[0014] The technical effects achieved by the present invention are:

[0015] An accidental fall protection structure for personnel in the elevator pit of the present invention, during operation, multiple infrared sensors detect the personnel fall signal. When a person falls from the second floor, they will break through the silk safety net and land on the metal safety net, and a sponge column is used for buffering. When falling from the third floor or above, the lifting mechanism raises the metal safety net, and the height of the raised metal safety net increases with the height of the personnel fall. The distance between the two safety nets can be reduced as the height of the personnel fall increases, and sufficient distance is left between the two safety nets to prevent the silk safety net from catching the fallen personnel. Both the silk safety net and the metal safety net are close to the bottom of the elevator shaft pit and do not hinder the operation of the elevator. In addition, the fallen personnel trigger the airbag assembly, and the inflated airbag assembly is used for further buffering to provide further protection for the fallen personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an embodiment of the front view of the present invention;

[0017] Figure 2 is an embodiment of the front view of the frame a of the present invention;

[0018] Figure 3 is an embodiment of the front view of the frame b of the present invention;

[0019] Figure 4 is an embodiment of the front view of the airbag assembly of the present invention;

[0020] Figure 5 is an embodiment of the front view of the sponge column of the present invention;

[0021] Figure 6 is an embodiment of the front view of the flange ring of the present invention.

[0022] In the drawings, the list of components represented by each reference numeral is as follows:

[0023] 1, silk safety net; 2, frame a; 3, infrared sensor; 4, controller; 5, metal safety net; 6, airbag assembly; 7, sponge column; 8, electric telescopic rod; 9, frame b; 10, flange ring; 11, leather sleeve; 12, cavity; 13, rubber band. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the objectives and advantages of the present invention clearer, the present invention will be specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific implementation manners of the present invention and does not strictly limit the scope of protection specifically claimed by the present invention.

[0025] As Figure 1-6As shown in the figure, an accidental falling protection structure for personnel in the elevator pit includes a silk safety net 1 and a frame a2 arranged at the edge of the silk safety net 1. A plurality of infrared sensors 3 are inclinedly installed on the upper surface of the frame a2. The lower ends of the infrared sensors 3 are fixedly connected to the upper surface of the frame a2 by screws. The emitted light beams of the infrared sensors 3 are all projected onto the upper wall of the elevator shaft. A controller 4 connected to the infrared sensors 3 is arranged on the frame a2. The back of the controller 4 is fixedly connected to the upper surface of the frame a2 by screws. A lifting mechanism is arranged on the lower surface of the frame a2. A metal safety net 5 connected to the lifting mechanism is arranged below the frame a2. A triggering member is arranged inside the metal safety net 5;

[0026] The triggering member includes an airbag assembly 6 installed in the middle of the metal safety net 5. Sponge columns 7 are installed in the holes of the metal safety net 5. The outer sides of the sponge columns 7 are bonded to the holes of the metal safety net 5. The two ends of the sponge columns 7 respectively extend out of the holes of the metal safety net 5. First, the frame a2 is fixed on the upper part of the elevator pit. During operation, a plurality of infrared sensors 3 monitor the personnel falling signal in real time. When the personnel falling signal is detected, if a person falls from the second floor, the silk safety net 1 will be broken and the person will fall on the metal safety net 5, and the sponge columns 7 are used for buffering. When falling from above the third floor, the lifting mechanism is started through the controller 4 to lift the metal safety net 5. The lifting height of the metal safety net 5 increases with the falling height of the person, and the distance between the two safety nets can be reduced as the falling height of the person increases. The falling person breaks through the silk safety net 1 and then falls on the metal safety net 5 at a lower speed, and there is enough space between the two safety nets to prevent the silk safety net 1 from jamming the falling person. Both the silk safety net 1 and the metal safety net 5 are close to the bottom of the elevator pit and will not hinder the operation of the elevator. And the falling person triggers the airbag assembly 6, and the inflated airbag assembly 6 is used for buffering again to further protect the falling person and reduce the occurrence of secondary danger caused by catching the falling person.

[0027] Furthermore, the silk safety net 1 has certain strength and elastic absorption function, which can absorb the energy of the falling person, avoid multiple rebounds back and forth, and cause secondary injuries to the person. It mainly protects the person from falling from the first floor door and absorbs the energy of falling from high floors, so that the falling person lies flat on the metal safety net 5 and the blood circulation is smooth.

[0028] Furthermore, the infrared sensor 3 is a ranging sensor of model LTF12UC2LDQP, with an induction distance of 20m, which can distinguish whether the falling object is a living human body and avoid triggering the protection structure by falling objects such as tools.

[0029] In one feasible embodiment, the airbag assembly 6 is composed of an airbag and a gas generator installed at the air inlet of the airbag. The gas generator receives the elastic energy of the falling person above the third floor and will only be triggered to generate gas and fill it into the airbag to make the airbag expand for buffering.

[0030] As shown in Figure 1 and Figure 2 The lifting mechanism includes a plurality of electric telescopic rods 8 fixedly installed on the lower surface of the frame a2. The upper ends of the electric telescopic rods 8 are fixedly connected to the lower surface of the frame a2 by bolts. The output ends of the electric telescopic rods 8 all extend vertically downward, and a frame b9 is fixedly installed between them. The upper surface of the frame b9 is fixedly connected to the output ends of the electric telescopic rods 8 by bolts. The inner side of the frame b9 is fixedly connected to the edge of the metal safety net 5. When the output ends of the electric telescopic rods 8 extend, the frame b9 and the metal safety net 5 can be lowered. Conversely, when the output ends of the electric telescopic rods 8 shorten, the frame b9 and the metal safety net 5 can be lifted.

[0031] Furthermore, both the frame b9 and the frame a2 are of concave structures and have the same opening direction, leaving space for the guide shoes of the elevator and the guide rails of the elevator shaft. Moreover, the frame a2 is detachable, facilitating the opening and closing when maintenance personnel enter and exit the elevator pit.

[0032] As shown in Figure 3 and Figure 6 A coaxial flange ring 10 is adhesively bonded to the outside of the airbag assembly 6. The flange ring 10 is made of rubber. The outside of the flange ring 10 is embedded in the middle of the metal safety net 5 and its upper edge is turned outward, providing protection outside the airbag assembly 6 to prevent the metal safety net 5 from cutting the airbag assembly 6 when pressed by a falling person.

[0033] As shown in Figure 1 , Figure 4 and Figure 5 A leather sleeve 11 is adhesively bonded between the upper surfaces of the sponge columns 7. The lower surface of the leather sleeve 11 is adhesively bonded to the upper surfaces of the sponge columns 7. A round hole is formed in the middle of the leather sleeve 11 and the upper end of the airbag assembly 6 passes through this round hole, strengthening the connection between the sponge columns 7 and providing protection in the gaps between the sponge columns 7, separating the falling person from the metal safety net 5 and preventing the falling person from contacting the metal safety net 5.

[0034] As shown in Figure 1 A hole 12 is formed in the middle of the silk safety net 1, facilitating the safety clamp at the bottom of the elevator car to pass through, and there is a safety distance of 100 - 200 mm between the silk safety net 1 and the bottom of the elevator car.

[0035] As shown in Figure 1 and Figure 2 A rubber band 13 is adhesively bonded to the edge of the hole 12. The rubber band 13 is in a ring structure, strengthening the position of the silk safety net 1 at the edge of the hole 12, relieving the surface tension of the silk safety net 1 and preventing it from being broken by the airflow brought by the descending elevator.

[0036] The working principle of the present invention is as follows: During operation, multiple infrared sensors 3 continuously monitor the signal of personnel falling until a personnel falling signal is detected. When a person falls from the second floor, the silk safety net 1 will be broken and the person will land on the metal safety net 5, and the sponge column 7 is used for buffering. When falling from a height above the third floor, the lifting mechanism is activated through the controller 4 to lift the metal safety net 5. The lifting height of the metal safety net 5 increases with the height of the personnel falling, and the distance between the two safety nets can be reduced as the falling height of the personnel increases. After the falling personnel break through the silk safety net 1, they land on the metal safety net 5 at a lower speed, and there is enough distance between the two safety nets to prevent the silk safety net 1 from jamming the falling personnel. Both the silk safety net 1 and the metal safety net 5 are close to the bottom of the elevator shaft pit and will not hinder the operation of the elevator. Moreover, the falling personnel trigger the airbag assembly 6, and the inflated airbag assembly 6 is used for further buffering to provide further protection for the falling personnel.

[0037] The above description is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention are implemented according to the conventional means in this field without special instructions and limitations.

Claims

1. An accidental fall protection structure for personnel in an elevator pit, comprising a silk safety net (1) and a frame a (2) arranged at the edge of the silk safety net (1), characterized in that: A plurality of infrared sensors (3) are inclinedly installed on the upper surface of the frame a (2), the emitted light beams of the infrared sensors (3) are all projected onto the upper wall of the elevator shaft, a controller (4) connected to the infrared sensors (3) is arranged on the frame a (2), a lifting mechanism is arranged on the lower surface of the frame a (2), a metal safety net (5) connected to the lifting mechanism is arranged below the frame a (2), and a triggering member is arranged inside the metal safety net (5); The triggering member includes an airbag assembly (6) installed in the middle of the metal safety net (5), sponge columns (7) are installed in the holes of the metal safety net (5), and both ends of the sponge columns (7) respectively extend out of the holes of the metal safety net (5); The lifting mechanism includes a plurality of electric telescopic rods (8) fixedly installed on the lower surface of the frame a (2), the output ends of the electric telescopic rods (8) all extend vertically downward and a frame b (9) is fixedly installed between them, both the frame b (9) and the frame a (2) are of concave structures and have the same opening direction, and the inner side of the frame b (9) is fixedly connected to the edge of the metal safety net (5); A coaxial flange ring (10) is adhesively bonded to the outer side of the airbag assembly (6), and the outer side of the flange ring (10) is embedded and installed in the middle of the metal safety net (5) and its upper edge is turned outward; A leather sleeve (11) is adhesively bonded between the upper surfaces of the sponge columns (7), a round hole is formed in the middle of the leather sleeve (11) and the upper end of the airbag assembly (6) passes through the round hole.

2. The accidental fall protection structure for personnel in the elevator pit according to claim 1, characterized in that: A hole (12) is formed in the middle of the silk safety net (1).

3. The accidental fall protection structure for personnel in the elevator pit according to claim 2, wherein: A rubber band (13) is adhesively bonded to the edge of the hole (12), and the rubber band (13) is of a ring structure.

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