Elevator shaft anti-fall protection system

Abstract

The present invention relates to the technical field of anti-falling protection for elevator hoistways, and discloses an anti-falling protection system for elevator hoistways. The present invention includes an anti-falling fixing frame, which is fixed to the wall on the side close to the elevator landing door by cement screws and is used as a load-bearing connecting component, an anti-falling bearing frame, one side of the anti-falling bearing frame is fixedly provided with a rotating shaft and is hinged to the anti-falling fixing frame through the rotating shaft, and torsion springs are arranged at the hinged positions at both ends of the rotating shaft. When the anti-falling bearing frame is in a parallel state with the anti-falling fixing frame, the torsion springs are in a state of storing energy, and an electromagnet is fixedly arranged on the anti-falling fixing frame for magnetically fixing the anti-falling bearing frame. Triggered by a spring with strong torsion force, the present invention can be quickly unfolded after the unlocking of the sensitive electromagnet, and the receiving cloth can be quickly unfolded from the folded state to form a large cloth bag by the gravity of the receiving plate skeleton, effectively increasing the bearing area.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-falling protection for elevator hoistways, especially an anti-falling protection system for elevator hoistways. Background Art

[0002] Combined with Figure 1 (the structure of the prior art), which includes an elevator traction motor 10 configured at the top of the elevator hoistway 11 for traction of the elevator car 16. Elevator guide rails 15 are symmetrically arranged on the left and right sides inside the elevator hoistway 11, and guide wheels cooperating with the elevator guide rails 15 are provided on the side of the elevator car 16 to ensure that there is no shaking during the movement traction by the elevator traction motor 10. In addition, elevator landing doors 12 are provided at the elevator stop positions on each floor of the building. After the elevator car 16 stops, it aligns with the elevator landing door 12 at this floor position to facilitate people to enter or leave the elevator car 16, and the elevator landing door 12 is used to close the elevator hoistway 11 when the elevator does not stop at this floor to prevent people from accidentally entering and falling.

[0003] However, the existing elevator landing door structure includes an upper landing door sill strip 13, an elevator landing door 12, and a lower landing door sill strip 14. Among them, the opening and locking structure of the elevator landing door 12 and the structure for supporting the weight of the elevator landing door 12 are both arranged above the elevator landing door 12 and cooperate with the upper landing door sill strip 13. That is to say, the lower landing door sill strip 14 does not bear the weight of the elevator landing door 12, and only a guiding convex block is provided below the elevator landing door 12 and is configured in the chute of the lower landing door sill strip 14, and then guides the lower end of the elevator landing door 12 during the translation of the elevator landing door 12. This leads to that it is very easy for the lower part of the elevator landing door 12 to open after being impacted, and people will invade the elevator hoistway 11 from below the elevator landing door 12 and then fall, resulting in serious injuries.

[0004] The above hazards are also pointed out in detail in the background art part of the patent publication number (CN106744212A). In order to reduce the hazards and losses caused after an object or a person invades the elevator hoistway 11, this case is proposed. Summary of the Invention

[0005] The present invention solves its technical problems by adopting the following technical solutions:

[0006] An anti-falling protection system for an elevator hoistway, including;

[0007] An anti-falling fixing frame, which is fixed on the wall near the elevator landing door by cement screws and is used as a load-bearing connecting component;

[0008] Anti-fall load-bearing frame, one side of the anti-fall load-bearing frame is fixedly provided with a rotating shaft and is hinged to the anti-fall fixing frame through the rotating shaft, and torsion springs are arranged at the hinged positions at both ends of the rotating shaft. When the anti-fall load-bearing frame is in a parallel state with the anti-fall fixing frame, the torsion springs are in a state of storing energy. And an electromagnet is fixedly arranged on the anti-fall fixing frame for magnetically fixing the anti-fall load-bearing frame. The anti-fall load-bearing frame is in a storage state. At this time, the electromagnet is in an energized state to generate magnetic attraction to magnetically fix the anti-fall load-bearing frame, and the torsion springs are in a state of storing energy. When the electromagnet receives a trigger signal, it is powered off;

[0009] Receiving cloth, the four sides of the receiving cloth are fixed on the anti-fall load-bearing frame. When the anti-fall load-bearing frame is unfolded, the receiving cloth forms an upwardly open bag shape. A folding storage part is also arranged at the bottom of the receiving cloth, and the folding storage part is configured to fold the receiving cloth to form a flattened structure for easy storage;

[0010] Cable, the two ends of the cable are respectively arranged on the anti-fall load-bearing frame and the anti-fall fixing frame, and the cable is configured to be obliquely straightened when the anti-fall load-bearing frame is opened, so as to connect the anti-fall load-bearing frame and the anti-fall fixing frame, so that at least two symmetric traction support points are obtained at the far end of the anti-fall load-bearing frame relative to the anti-fall fixing frame;

[0011] Electric control system, including a trigger fixed at the lower end of the elevator landing door and a controller for controlling the electromagnet. The controller is a wired control and is connected to the controlled components through wires, and the controller and the trigger are wired connected. And the trigger is configured to be triggered by hitting the lower landing sill bar of the elevator when the elevator landing door leaves the normal moving stroke range of the lower landing sill bar and intrudes into the elevator hoistway. After receiving the trigger signal, the controller immediately powers off the electromagnet, so that the anti-fall load-bearing frame is unfolded. And the controller is wired connected to the elevator emergency button or fire protection switch on the adjacent floor, and can be triggered simultaneously to control the stop of the elevator car in the corresponding elevator hoistway.

[0012] In a preferred embodiment, the folding and storage part includes a storage plate skeleton fixed to the lower end face of the receiving cloth by stitching or gluing. A storage plastic plate is fixedly arranged on the storage plate skeleton, and a magnetic attracting armature is fixedly arranged at the end of the storage plate skeleton. Electromagnets magnetically attracted to the magnetic attracting armature are arranged at the middle positions of the four side edges of the anti-falling load-bearing frame. When the receiving cloth is folded and stored and is flattened by the storage plastic plate, at this time, the magnetic attracting armature is magnetically attracted to the electromagnet fixed on the anti-falling load-bearing frame for fixation. When the elevator landing door is invaded, the electromagnets on the anti-falling load-bearing frame and the electromagnets on the anti-falling fixing frame are powered off synchronously. The anti-falling load-bearing frame quickly unfolds under the elastic potential energy of the torsion spring, and the receiving cloth quickly unfolds under the gravity traction of the storage plate skeleton.

[0013] In a preferred embodiment, at least two impact buffering devices are symmetrically and fixedly arranged on the anti-falling load-bearing frame. One end of the cable is fixedly provided with a limiting block and is arranged in a through-hole structure in the anti-falling fixing frame, and the other end is connected to the impact buffering device. Moreover, a cable opening is provided on the front side of the anti-falling fixing frame. Two anti-jamming rollers spaced up and down are horizontally rotatably arranged in the cable opening, and the cable passes through between the anti-jamming rollers. After being arranged, it can effectively improve the concealment of the cable in the storage state, which is convenient for storage. In addition, after the anti-falling load-bearing frame unfolds, it can quickly form an inclined pulling state, and the limiting block is used to limit the end of the cable to pass through the cable opening to ensure an inseparable connection between the end of the cable and the anti-falling fixing frame.

[0014] In a preferred embodiment, a piston block is slidably arranged in the impact buffering device. One end of the cable is fixed on the piston block, and a spring is arranged in the impact buffering device and abuts against the right end face of the piston block. When the anti-falling load-bearing frame is impacted by falling, the spring can absorb part of the impact force through deformation, reduce the rigid impact force on the rigid connection between the cable and the anti-falling fixing frame, and reduce the instantaneous impact on the rigid connection position between the anti-falling fixing frame and the wall.

[0015] In a preferred embodiment, a compressed gas cylinder is arranged on the anti-falling fixing frame. An exhaust pipe is arranged in the anti-falling fixing frame and is communicated with the exhaust port of the compressed gas cylinder. The other port of the exhaust pipe is provided with a threaded pipe joint and is led out from any position on the k surface. An inflatable airbag is arranged on the inner side of the receiving cloth, and the inflatable airbag is connected to the threaded pipe joint on the k surface through a hose with a threaded pipe joint. A solenoid valve is arranged on the exhaust pipe of the compressed gas cylinder, and the solenoid valve is controlled by a controller. When the solenoid valve is opened, compressed air is quickly filled into the inflatable airbag on the inner side of the receiving cloth to form a better protection buffer layer.

[0016] In a preferred embodiment, the inflatable airbag can be adhered by gluing or by respectively gluing matching Velcro on the receiving cloth and the inflatable airbag and then bonding them with Velcro. The design of bonding the Velcro is convenient for removing the airbag and replacing it with a new one after use. And the compressed gas cylinder is connected to the anti-falling fixing frame through a threaded sealing structure, which is convenient for replacing the compressed gas cylinder and saves the use cost.

[0017] In a preferred embodiment, it further includes at least two symmetrically arranged auxiliary load-bearing devices. The auxiliary load-bearing devices are configured on the inner side wall of the elevator shaft. The auxiliary load-bearing device includes a base fixed to the wall by cement screws and a bearing plate hinged to the base. A horizontally arranged limiting plate is fixedly provided below the base. Similarly, torsion springs are provided at both ends of the hinge shaft of the bearing plate to make the bearing plate flip open. The auxiliary load-bearing device is in a non-open state and is convenient for being stored in the elevator shaft. An electromagnet is also provided on the base, and the electromagnet on the base is uniformly controlled by a controller. After the bearing plate loses the magnetic attraction and fixation of the electromagnet, it flips 90 degrees and presses on the limiting plate to form a support point. The side of the anti-falling bearing frame is placed on the bearing plate after being unfolded, so that the auxiliary load-bearing device forms a support position for the distal end of the anti-falling bearing frame, further improving the bearing capacity of the anti-falling bearing frame.

[0018] In a preferred embodiment, when the anti-falling bearing frame is unfolded as shown in the figure, after the anti-falling bearing frame is impacted in the unfolded state, the downward flipping angle of the anti-falling bearing frame does not exceed five degrees. And when the anti-falling bearing frame is at the rotation limit position, the anti-falling bearing frame contacts the bearing plate, and the bearing plate supports the anti-falling bearing frame to improve safety.

[0019] In a preferred embodiment, the trigger is a push-type electronic switch. The push-type electronic switch is fixed at the lower end of the elevator landing door and extends into the chute of the lower landing door sill bar. It does not contact the lower landing door sill bar when the elevator landing door opens and closes normally. When the elevator landing door is impacted and deformed, the push-type electronic switch impacts on the lower landing door sill bar to generate a trigger signal. Additionally, a laser trigger can also be used.

[0020] In a preferred embodiment, a reserved installation pit is provided on the installation wall surface of the anti-falling fixing frame and the anti-falling bearing frame. When the device is installed and in the storage state, it does not intrude into the travel range of the original elevator car at any position.

[0021] The advantages and positive effects of the present invention are:

[0022] 1. When the device is in the storage state, such asFigure 4 The structure shown is relatively flat, which is convenient for installation in the elevator shaft. By drilling corresponding installation pits on the installation wall, the inner wall of the elevator shaft can maintain the same flatness as before installation after the installation of the device, ensuring the safe operation of the elevator structure without unnecessary modification.

[0023] 2. The device is triggered by a strong torsion spring. After the responsive electromagnet is unlocked, it can be quickly unfolded and the receiving cloth 28 can be quickly unfolded from a folded state to form a large cloth bag through the gravity of the storage plate frame 32, which effectively increases the bearing area. The compressed gas cylinder 24, which is also triggered by the solenoid valve, quickly fills the gas into the airbag above the receiving cloth 28 to form a cushion above the receiving cloth 28, which effectively improves the buffering capacity.

[0024] 3. Through the structural design of the cable 23, on the one hand, it can be accommodated in the anti-falling fixed frame 18 when stored, and after the anti-falling load-bearing frame 40 is unfolded, it quickly forms an oblique pulling state to form a supporting traction point for the front end of the anti-falling load-bearing frame 40, thereby ensuring the load-bearing capacity of the anti-falling load-bearing frame 40, and the anti-stuck roller 22 set can ensure the smooth export of the cable 23.

[0025] 4. By setting the impact buffer device 29, the two traction points at the front end of the anti-falling bearing frame 40 have a certain buffering force, which partially releases the impact of falling. This is beneficial to the connection stability between the anti-falling fixing frame 18 and the wall, the structural stability of the anti-falling bearing frame 40 itself, and the skeletal stability of the human body.

[0026] 5. Support the side of the anti-falling load-bearing frame 40 by adding auxiliary load-bearing devices 30 as a redundant safety factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Figure 1 It is a structural schematic diagram of an elevator shaft and an elevator in the prior art;

[0029] Figure 2 The present invention is configured in Figure 1 Schematic diagram of the structure;

[0030] Figure 3 is a schematic diagram of the structure of the present invention (wherein the auxiliary load bearing device 30 is relatively far away from the anti-falling bearing frame 40, and the device is in an unfolded state);

[0031] Figure 4 is a schematic diagram of the structure of the present invention (the device is in a stowed state and the impact buffer device 29 and the cable 23 are omitted);

[0032] Figure 5 is a schematic structural view of the auxiliary load-bearing device 30 in the present invention;

[0033] Figure 6 is Figure 3 a schematic internal structure view of the bearing plate 29 in;

[0034] Figure 7 is a schematic view of the force travel positions of the anti-fall fixing frame 18, the cable 23, the anti-fall bearing frame 40, and the bearing plate 39 in the present invention.

[0035] Figure 8 is a schematic side structure view of the elevator landing door 12, the lower landing sill bar 14, and the trigger assembly in the present invention.

[0036] Markings in the figure: 10, elevator traction motor; 11, elevator shaft; 12, elevator landing door; 13, upper landing sill bar; 14, lower landing sill bar; 15, elevator guide rail; 16, elevator car; 18, anti-fall fixing frame; 19, cement screw; 20, through-hole structure; 21, cable opening; 22, anti-jamming roller; 23, cable; 24, compressed gas cylinder; 27, rotating shaft; 28, receiving cloth; 29, impact buffer device; 30, auxiliary load-bearing device; 31, storage plastic plate; 32, storage plate skeleton; 33, magnetic attraction armature; 34, electromagnet; 35, piston block; 36, spring; 37, base; 38, limit plate; 39, bearing plate; anti-fall bearing frame, 40. Detailed implementation manners

[0037] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention. The following is a further detailed description of the embodiments of the present invention with reference to the accompanying drawings:

[0038] As Figures 1-6 shown, the elevator shaft anti-fall protection system of the present invention includes;

[0039] An anti-fall fixing frame 18, which is fixed to the wall on the side close to the elevator landing door 12 by cement screws 19 and is used as a load-bearing connection component;

[0040] An anti-fall bearing frame 40, one side of which is fixedly provided with a rotating shaft 27 and is hinged to the anti-fall fixing frame 18 through the rotating shaft 27, and torsion springs are arranged at the hinged positions at both ends of the rotating shaft 27. When the anti-fall bearing frame 40 is in a parallel state with the anti-fall fixing frame 18 (as Figure 4 ) the torsion springs are in a state of storing energy, and an electromagnet 34 is fixedly provided on the anti-fall fixing frame 18 for magnetic attraction and fixation of the anti-fall bearing frame 40, combined withFigure 4 When the anti-fall bearing frame 40 is in a retracted state, at this time, the electromagnet 34 is energized to generate a magnetic suction force to magnetically fix the anti-fall bearing frame 40, and the torsion spring is in a state of storing energy. When the electromagnet 34 receives a trigger signal and is powered off, the torsion spring expands the anti-fall bearing frame 40 to the position as shown in Figure 3 to become an expanded protection state;

[0041] A receiving cloth 28, the four sides of the receiving cloth 28 are fixed on the anti-fall bearing frame 40. When the anti-fall bearing frame 40 is expanded, the receiving cloth 28 forms a cloth bag shape with an upward opening. A folding and retracting portion is further provided at the bottom of the receiving cloth 28, and the folding and retracting portion is configured to fold the receiving cloth 28 to form a flattened structure for easy storage;

[0042] A cable 23, both ends of the cable 23 are respectively arranged on the anti-fall bearing frame 40 and the anti-fall fixing frame 18, and the cable 23 is configured to be obliquely straightened when the anti-fall bearing frame 40 is opened, thereby connecting the anti-fall bearing frame 40 and the anti-fall fixing frame 18, so that at least two symmetric traction support points (such as Figure 3 ) are obtained at the distal end of the anti-fall bearing frame 40 relative to the anti-fall fixing frame 18.

[0043] An electric control system, including a trigger fixed at the lower end of the elevator landing door 12 and a controller for controlling the electromagnet 34. The controller is wired-controlled and connected to the controlled components through wires, and the controller and the trigger are wired-connected. And the trigger is configured to be triggered by hitting the lower landing sill bar 14 of the landing door when the elevator landing door 12 leaves the normal moving stroke range of the lower landing sill bar 14 and intrudes into the elevator hoistway 11. After receiving the trigger signal, the controller immediately powers off the electromagnet 34, thereby expanding the anti-fall bearing frame 40, and the controller is wired-connected to the elevator emergency button or fire protection switch on the adjacent floors, and can be triggered simultaneously to control the stop of the elevator car 16 in the corresponding elevator hoistway.

[0044] In a preferred embodiment, the folding and retracting portion includes a storage board skeleton 32 fixed to the lower end surface of the receiving cloth 28 by sewing or gluing, and a storage plastic board 31 is fixedly arranged on the storage board skeleton 32, and a magnetic suction armature 33 is fixedly arranged at the end of the storage board skeleton 32. Electromagnets 34 for magnetic suction with the magnetic suction armature 33 are arranged at the middle positions of the four sides of the anti-fall bearing frame 40. When the receiving cloth 28 is folded and stored, it is flattened by the storage plastic board 31 (as shown in Figure 4), at this time, the magnetic armature 33 is magnetically attracted to the electromagnet 34 fixed on the anti-falling bearing frame 40 and then fixed. When the elevator floor door 12 is invaded, the electromagnet 34 on the anti-falling bearing frame 40 and the electromagnet 34 on the anti-falling fixing frame 18 are simultaneously powered off, and the anti-falling bearing frame 40 is quickly unfolded under the elastic potential energy of the torsion spring, and the receiving cloth 28 is quickly unfolded under the gravity traction of the storage plate frame 32.

[0045] In a preferred embodiment, at least two impact buffer devices 29 are symmetrically fixed on the anti-falling bearing frame 40, wherein one end of the cable 23 is fixedly provided with a limit block and is arranged in the through-hole structure 20 in the anti-falling fixing frame 18, and the other end is connected to the impact buffer device 29, and the front side of the anti-falling fixing frame 18 is provided with a cable opening 21, and two anti-stuck rollers 22 spaced apart vertically and horizontally rotated in the cable opening 21 are provided, and the cable 23 passes through between the anti-stuck rollers 22. After being set, the concealment of the cable 23 in the storage state can be effectively improved, which is convenient for storage. In addition, after the anti-falling bearing frame 40 is unfolded, a diagonal state can be quickly formed, and the limit block is used to limit the end of the cable 23 to pass through the cable opening 21 to ensure that the end of the cable 23 forms an inseparable connection with the anti-falling fixing frame 18.

[0046] In a preferred embodiment, a piston block 35 is slidably provided in the impact buffer device 29, one end of the cable 23 is fixed on the piston block 35 and a spring 36 is provided in the impact buffer device 29 to press against the right end surface of the piston block 35. When the anti-fall bearing frame 40 is subjected to a falling impact, the spring 36 can absorb part of the impact force through deformation, thereby reducing the rigid impact force's damage to the rigid connection between the cable 23 and the anti-fall fixing frame 18, and reducing the instantaneous impact caused by the rigid impact force on the rigid connection position between the anti-fall fixing frame 18 and the wall.

[0047] In a preferred embodiment, the combination Figure 3A compressed gas cylinder 24 is arranged on the anti-falling fixing frame 18, and an exhaust pipeline connected with the exhaust port of the compressed gas cylinder 24 is arranged inside the anti-falling fixing frame 18, and the other end of the exhaust pipeline is provided with a threaded pipe joint and is led out from any position of the k surface, an inflatable airbag is arranged on the inner side of the receiving cloth 28, and the inflatable airbag is connected to the threaded pipe joint on the k surface through a hose with a threaded pipe joint, and a solenoid valve is arranged on the exhaust pipeline of the compressed gas cylinder 24, and the solenoid valve is controlled by a controller by wire. When the solenoid valve is opened, compressed air is quickly filled into the inflatable airbag inside the receiving cloth 28 to form a better protective buffer layer (the inflatable airbag, the solenoid valve, the exhaust pipeline, and the hose with a threaded pipe joint are not shown in the figure).

[0048] In a preferred embodiment, the inflatable airbag can be bonded by gluing or by gluing matching Velcro to the receiving cloth 28 and the inflatable airbag respectively and then bonding them by Velcro. The design of bonding Velcro is to facilitate the removal of the airbag and replacement of a new one after use, and the compressed gas cylinder 24 is connected to the anti-fall fixing frame 18 by a threaded sealing structure, which makes it convenient to replace the compressed gas cylinder 24 and saves usage costs.

[0049] In a preferred embodiment, at least two symmetrically arranged auxiliary load bearing devices 30 are further included. The auxiliary load bearing devices 30 are arranged on the inner wall of the elevator shaft 11. The auxiliary load bearing devices 30 include a base 37 fixed to the wall by cement screws and a bearing plate 39 hinged to the base 37. A horizontally arranged limit plate 38 is fixedly arranged below the base 37. Similarly, torsion springs are arranged at both ends of the hinge shaft of the bearing plate 39 to enable the bearing plate 39 to flip open. Figure 5 The auxiliary load-bearing device 30 is in an unopened state for easy storage in the elevator shaft 11. An electromagnet 34 is also provided on the base 37, and the electromagnet 34 on the base 37 is uniformly controlled by a controller. The bearing plate 39 flips ninety degrees after losing the magnetic fixation of the electromagnet and presses on the limit plate 38 to form a support point. The side frame of the anti-falling bearing frame 40 is mounted on the bearing plate 39 after unfolding, so that the auxiliary load-bearing device 30 forms a support position for the far end of the anti-falling bearing frame 40, further improving the bearing capacity of the anti-falling bearing frame 40.

[0050] In a preferred embodiment, the combination Figure 7, when the anti-fall bearing frame 40 is unfolded as shown in the figure (the solid line part in the figure), after the anti-fall bearing frame 40 is impacted in the unfolded state, the downward flipping angle of the anti-fall bearing frame 40 does not exceed five degrees (the dotted line part in the figure is the rotational extreme position of the anti-fall bearing frame 40), and when the anti-fall bearing frame 40 is in the rotational extreme position, the anti-fall bearing frame 40 contacts the bearing plate 39, and the bearing plate 39 supports the anti-fall bearing frame 40 to improve safety.

[0051] In a preferred embodiment, the trigger is a push-button electronic switch, and the push-button electronic switch is fixed at the lower end of the elevator landing door 12 and extends into the chute of the lower landing sill 14. When the elevator landing door 12 opens and closes normally and translates, it does not contact the lower landing sill 14. When the elevator landing door 12 is impacted and deformed, the push-button electronic switch impacts on the lower landing sill 14 to generate a trigger signal. Additionally, a laser trigger can also be used.

[0052] In a preferred embodiment, a reserved installation pit is provided on the installation wall surface of the anti-fall fixing frame 18 and the anti-fall bearing frame 40. When the device as Figure 4 is installed in contact with the wall surface, the exposed wall surface of the anti-fall bearing frame 40 is flush with the inner wall surface of the elevator shaft 11. When the device is installed and in the storage state, it does not intrude into the travel range of the original elevator car at any position.

[0053] In addition, according to actual conditions, multiple such devices can be arranged at intervals in the elevator shaft 11, and the protection part and the control part of the device can be arranged staggeredly to increase the safety redundancy. For example, a trigger and a controller can be set on the elevator landing door 12 on the 9th floor to control the electromagnet 34 set on the 7th floor or the 6th floor. As shown in the figure, the anti-fall fixing frame 18 is arranged between two adjacent elevator landing doors 12 up and down, which does not affect the normal use of the elevator, and the initially opened opening is also close to the side where people fall, which can achieve a better protection effect.

[0054] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention is not limited to the embodiments described in the specific embodiments. Any other embodiments obtained by those skilled in the art according to the technical solutions of the present invention also belong to the protection scope of the present invention.

Claims

1. Elevator shaft anti-fall protection system, characterized by: include; An anti-falling fixing frame (18) connected to the load-bearing structure is fixed to a wall near the elevator floor door (12) by cement screws (19) and is located between the upper and lower elevator floor doors (12); An anti-falling load-bearing frame (40), wherein a rotating shaft (27) is fixedly provided on one side of the anti-falling load-bearing frame (40) and is hinged to the anti-falling fixing frame (18) through the rotating shaft (27), and torsion springs are arranged at both ends of the rotating shaft (27), and when the anti-falling load-bearing frame (40) and the anti-falling fixing frame (18) are in a parallel state, the torsion springs are in a force storage state, and an electromagnet (34) is fixedly provided on the anti-falling fixing frame (18) to magnetically fix the anti-falling load-bearing frame (40); A receiving cloth (28), wherein the four sides of the receiving cloth (28) are fixed on the anti-falling bearing frame (40) and the receiving cloth (28) is in the shape of a cloth bag that is open upwards after being unfolded, and a folding storage portion is also provided at the bottom of the receiving cloth (28), and the folding storage portion is configured to store the receiving cloth (28) after folding it into a flat structure; A cable (23) connects the anti-falling bearing frame (40) and the anti-falling fixing frame (18); The electric control system comprises a trigger fixed at the lower end of an elevator landing door (12) and a controller for controlling the electromagnet (34), wherein the trigger is configured to be triggered by colliding with a lower door sill strip (14) of the landing door when the elevator landing door (12) intrudes into an elevator shaft (11), and the controller cuts off the power to the electromagnet (34) after receiving the trigger signal to unfold the anti-falling bearing frame (40), and the controller is configured to be linked with an elevator emergency button or a fire protection switch to simultaneously control the elevator car (16) in the corresponding elevator shaft to stop; the folding storage portion comprises a folding storage portion fixed to the elevator by sewing or gluing A storage plate frame (32) is provided at the lower end surface of the receiving cloth (28), and a storage plastic plate (31) is fixedly provided on the storage plate frame (32), and a magnetic armature (33) is fixedly provided at the end of the storage plate frame (32), and an electromagnet (34) magnetically attracted to the magnetic armature (33) is arranged at the middle position of the four side edges of the anti-falling bearing frame (40), when the receiving cloth (28) is folded and stored and pressed and stored by the storage plastic plate (31), at this time, the magnetic armature (33) is magnetically attracted to the electromagnet (34) fixed on the anti-falling bearing frame (40) and then fixed.

2. The elevator shaft fall protection system according to claim 1, characterized in that: At least two impact buffer devices (29) are symmetrically fixed on the anti-falling bearing frame (40), wherein one end of the cable (23) is fixedly provided with a limit block and is arranged in a through hole structure (20) in the anti-falling fixing frame (18), and the other end is connected to the impact buffer device (29), and the front side of the anti-falling fixing frame (18) is provided with a cable opening (21), and two anti-stuck rollers (22) spaced apart from each other are horizontally rotatably arranged in the cable opening (21), and the cable (23) passes through between the anti-stuck rollers (22), and the limit block cannot pass through the gap between the anti-stuck rollers (22).

3. The elevator shaft fall protection system according to claim 2, characterized in that: The cable (23) is configured such that when the anti-falling load-bearing frame (40) is opened, the cable (23) is straightened obliquely to connect the anti-falling load-bearing frame (40) and the anti-falling fixing frame (18); a piston block (35) is slidably provided in the impact buffer device (29); one end of the cable (23) is fixed on the piston block (35); and a spring (36) is provided in the impact buffer device (29) to press against the right end surface of the piston block (35).

4. The elevator shaft fall protection system according to claim 1, 2 or 3, characterized in that: A compressed gas cylinder (24) is arranged on the anti-falling fixing frame (18), and an exhaust pipeline connected to the exhaust port of the compressed gas cylinder (24) is arranged inside the anti-falling fixing frame (18), and the other end of the exhaust pipeline is provided with a threaded pipe joint and is led out from any position of the k-surface, an inflatable airbag is arranged on the inner side surface of the receiving cloth (28), and the inflatable airbag is connected to the threaded pipe joint on the k-surface through a hose with a threaded pipe joint, and an electromagnetic valve is arranged on the exhaust pipeline of the compressed gas cylinder (24), and the electromagnetic valve is controlled by a controller.

5. The elevator shaft fall protection system according to claim 4, characterized in that: The inflatable airbag can be connected to the receiving cloth (28) by gluing or gluing matching Velcro tapes on the receiving cloth (28) and the inflatable airbag respectively and then bonding them with Velcro tapes. The compressed gas cylinder (24) is connected to the anti-fall fixing frame (18) by a threaded sealing structure.

6. The elevator shaft fall protection system according to claim 4, characterized in that: The invention also comprises at least two symmetrically arranged auxiliary load bearing devices (30), wherein the auxiliary load bearing devices (30) are arranged on the inner side wall of the elevator shaft (11), and the auxiliary load bearing devices (30) comprise a base (37) fixed on the wall by cement screws and a bearing plate (39) hinged on the base (37); a horizontally arranged limit plate (38) is fixedly arranged below the base (37); torsion springs are arranged at both ends of the hinge axis of the bearing plate (39) for flipping and opening the bearing plate (39) by elastic potential energy; an electromagnet (34) is also arranged on the base (37), and the electromagnet (34) on the base (37) is uniformly controlled by a controller; the bearing plate (39) flips 90 degrees after losing the magnetic attraction fixation of the electromagnet and presses on the limit plate (38) to form a support point; and the side frame of the anti-fall bearing frame (40) is mounted on the bearing plate (39) after unfolding.

7. The elevator shaft fall protection system according to claim 6, characterized in that: After the anti-falling load-bearing frame (40) is impacted again in the unfolded state, the downward turning angle of the anti-falling load-bearing frame (40) does not exceed five degrees, and when the anti-falling load-bearing frame (40) is at the rotation limit position, the anti-falling load-bearing frame (40) contacts the bearing plate (39).

8. The elevator shaft fall protection system according to claim 1, characterized in that: The trigger is a push-type electronic switch, which is fixed at the lower end of the elevator landing door (12) and extends into a slide groove of a lower door sill strip (14) of the landing door. When the elevator landing door (12) is normally opened and closed, it does not contact the lower door sill strip (14) of the landing door. When the elevator landing door (12) is impacted, it is deformed so that the push-type electronic switch hits the lower door sill strip (14) of the landing door to generate a trigger signal.

9. The elevator shaft fall protection system according to claim 1, characterized in that: A reserved installation pit is provided on the installation wall surface of the anti-falling fixing frame (18) and the anti-falling bearing frame (40); after installation, the device will not intrude into the travel range of the original elevator car at any position in the storage state.

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