Anti-collision device for twin elevators

Abstract

The invention discloses an anti-collision device for double elevators and aims to solve the problems that in the prior art, although the anti-collision function of the double elevators is achieved through system calculation and electrical triggering, a detection part is complex in structure, and a lift car is prone to collision once an electrical system and a detection system break down. The technical problem is solved through the following technical scheme that safety tongs are arranged on a lift car, and the safety tongs are in braking fit with a sliding rail; the detection pressing plate is arranged at the bottom of the lift car, the detection pressing plate rotates around the fulcrum, the position, away from the fulcrum, of the detection pressing plate is connected with a detection block through a detection rope, and the detection block falls to the bottom of the lift car; the brake triggering device is connected with the detection pressing plate; according to the brake triggering device, the force of the detection block acts on the detection pressing plate, and the detection pressing plate is kept balanced; the heavy block makes contact with an obstacle, the detection pressing plate loses balance and rotates around the fulcrum, the brake triggering device is triggered after rotation, and the brake triggering device triggers the safety tongs to achieve braking.

Description

Technical Field

[0001] The present invention relates to the technical field of twin elevators, and more particularly to an anti-collision device for twin elevators. Background Art

[0002] A twin elevator is an elevator with two independent cabins. The two cabins run up and down in the same shaft. Each cabin serves different floors and does not interfere with each other. The two cabins run independently. Guests can choose to take different cabins to reach different floors as needed. Twin elevators have the advantages of high transportation efficiency and reduced floor space.

[0003] Since the two cars move in the same shaft, in order to avoid collision between the two cars, several layers of anti-collision devices are arranged inside the shaft. The following four anti-collision protection barriers are commonly used in the prior art: (1) The elevator dispatching logic control reasonably distributes the operation commands of the upper and lower cars through an intelligent algorithm to ensure the safety of the running channel of the cars in the shaft; (2) The distance and relative speed of the upper and lower cars are detected and controlled in real time based on the speed curve to ensure that the minimum safe distance between the two cars always meets the design requirements (stop the elevator and slow down the elevator); (3) Once the system detects that the safety distance of the third-level protection is about to be exceeded (triggering the brake braking boundary line), the upper and lower cars are stopped by disconnecting the safety circuit to brake the main engine; (4) Once the system detects that the safety distance of the fourth-level protection is about to be exceeded (triggering the safety clamp braking boundary line), the electronic speed limiter is triggered to stop the safety clamp, and the upper and lower cars are firmly stopped on the guide rail.

[0004] Although the above technical solution can prevent the two cars from colliding, it has the following two shortcomings: (1) Before a collision occurs, the safety clamp will brake urgently, causing the car bearing the weight of the passengers to have a large braking acceleration, which may easily cause harm to the passengers; (2) Since its anti-collision function is mainly completed through system calculation and electrical triggering, and the structure of the detection part is complex, once the electrical system or the detection system fails, the cars are likely to collide with each other. Summary of the invention

[0005] The present invention overcomes two deficiencies in the prior art: (1) Although the anti-collision function of a twin elevator is realized through system calculation and electrical triggering, not only is the structure of the detection part complex, but once the electrical system and the detection system fail, the car is prone to collision; (2) When the existing anti-collision technology of a twin elevator is triggered, the safety clamp is emergency braked, and the braking acceleration of the car borne by the passengers is large, which is easy to cause harm to the passengers; an anti-collision device for a twin elevator is provided, which triggers the safety clamp by mechanical means, and can serve as the last safety protection barrier to realize emergency braking of the car, thereby ensuring safe and stable operation of the elevator; in addition, it can issue a safety warning when the collision object reaches the warning position, and control the car to decelerate. When the collision object reaches the limit position, the car is emergency braked, thereby reducing the damage to the passengers caused by the large acceleration.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solution: an anti-collision device for twin elevators, comprising: A safety clamp is arranged on the car, and the safety clamp forms a braking cooperation with the slide rail; A detection pressure plate is arranged at the bottom of the car, the detection pressure plate rotates around a fulcrum, the detection pressure plate is connected to a detection block through a detection rope at a position far away from the fulcrum, and the detection block hangs at the bottom of the car; A brake trigger device connected to the detection pressure plate; The force of the brake trigger device and the detection block acts on the detection pressure plate, and the detection pressure plate keeps balance; when the weight block contacts the obstacle, the detection pressure plate loses balance and rotates around the fulcrum, and the brake trigger device is triggered after rotation, and the brake trigger device triggers the safety clamp to achieve braking.

[0007] In the present invention, in the initial state, the brake trigger device and the detection block act on the detection plate together through the tension of the detection rope on the detection plate, so that the detection plate remains balanced. When the detection block at the bottom of the car collides with an obstacle (the bottom of the car or the bottom of the shaft), the tension of the detection block on the detection rope decreases or disappears, and the detection plate loses balance at this time. The detection plate rotates, the brake trigger device is triggered, and the brake trigger device triggers the brake block of the safety clamp, which holds the slide rail in the shaft to brake the car. Through the above steps, it can serve as the last protective barrier for the operation of the elevator, and can quickly and reliably trigger the safety clamp in an emergency in the car to ensure the safe operation of the elevator.

[0008] Preferably, the brake trigger device includes a trigger part, a trigger spring and a trigger rope; one end of the trigger part is connected to the safety clamp, one end of the trigger rope is connected to the detection pressure plate, and the other end of the trigger rope and the other end of the trigger part are both connected to the trigger spring; the contraction force of the trigger spring is balanced with the tension of the trigger rope; when the detection block collides with an obstacle, the tension of the trigger rope is reduced, the trigger spring contracts, and the trigger part triggers the safety clamp to achieve braking.

[0009] In the initial state, the trigger spring is in an extended state, and there are two balance points in this application. The first balance point is that the force of the trigger spring contraction is balanced with the tension of the trigger rope and the gravity of the trigger part; the second balance point is that the tension of the detection block on the detection plate and the tension of the trigger rope on the detection plate are balanced.

[0010] When the detection block collides with an obstacle, the tension of the detection rope decreases, which reduces the tension of the trigger rope, thereby contracting the trigger spring. The trigger spring pulls the trigger part upward, causing the trigger part to trigger the brake block of the safety clamp, and the safety clamp is braked.

[0011] Preferably, it also includes a detection switch in contact with the detection pressure plate; when the weight is in contact with the obstacle, the detection pressure plate acts on the detection switch when it rotates around the fulcrum.

[0012] When the detection block just touches the obstacle, the detection block is in the warning position, and the detection pressure plate rotates immediately, so that the detection pressure plate acts on the detection switch. The detection switch is a normally closed switch, so that the detection switch is turned on and the braking system in the car is started, thereby realizing slow braking of the car; if the obstacle continues to approach the detection block and reaches the limit position, emergency braking is required, which triggers the tension spring to pull the second short shaft to rotate upward, thereby realizing the braking of the safety clamp.

[0013] Preferably, a fixed base is provided at the bottom of the car, and a plurality of positioning holes are provided on the fixed base along its length direction, and a switch fixing seat matching with the positioning hole is provided in the positioning hole; the position of the switch fixing seat is adjusted to the position of the positioning hole, thereby adjusting the position of the detection switch.

[0014] The position of the detection switch can be adjusted by adjusting the position of the switch fixing seat in the positioning hole. The switch fixing seat is inserted in the position of different positioning holes to adjust the deformation amount when the detection switch is triggered.

[0015] Preferably, the fixed base includes a sliding hole arranged along its length direction, a plurality of positioning holes are arranged on one side of the sliding hole, and an open groove is arranged on the other side of the sliding hole; a fixing rod is arranged in the open groove, one end of the fixing rod is connected to the positioning block, and a switch fixing seat is arranged at the other end of the fixing rod; a positioning spring is sleeved on the fixing rod to push the positioning block to abut against the positioning hole.

[0016] Under normal circumstances, the positioning block can stably abut the positioning hole under the thrust of the positioning spring. When the position of the positioning block needs to be adjusted, the switch fixing seat can be directly pulled to disengage the positioning block from the positioning hole, and then the switch fixing seat can be moved to make the fixing rod slide along the opening groove. When the positioning block reaches the designated positioning hole, the hand is released, and the positioning block is re-stuck in the positioning hole under the force of the positioning spring. Therefore, through the above structure, the position of the detection switch can be easily adjusted, and the deformation amount when the detection switch is triggered can be easily adjusted.

[0017] Preferably, it also includes a safety clamp synchronization mechanism, which includes a synchronization rod and short shaft assemblies respectively arranged at both ends of the synchronization rod, and the short shaft assemblies at both ends of the synchronization rod are respectively connected to the trigger parts of the two safety clamps; the short shaft assembly includes a first short shaft and a second short shaft; the first short shaft and the second short shaft are both fixedly connected to the central rotating shaft; the end of the first short shaft away from the second short shaft is rotatably connected to the synchronization rod; the end of the second short shaft away from the first short shaft is connected to the trigger part.

[0018] In order to enable the car to obtain a more stable braking force during emergency braking, a safety clamp is usually provided on both sides of the car. In order to achieve synchronous braking of the two safety clamps, a safety clamp synchronization mechanism is provided on the car in this embodiment, that is, when an emergency occurs, the safety clamps on both sides of the car can achieve synchronous braking.

[0019] Preferably, a spring baffle is provided on the car, a synchronous pull rod is passed through the spring baffle, and an abutment ring is provided on the synchronous pull rod; a reset spring is sleeved on the synchronous pull rod, and two ends of the reset spring are respectively abutted against the abutment ring and the spring baffle.

[0020] The reset spring can push the abutment ring so that the synchronous pull rod remains reset and the synchronous pull rod remains in an initial state.

[0021] Preferably, a short shaft hole is provided on the second short shaft; one end of the trigger spring is connected to the car, and the other end of the trigger spring is connected to the short shaft hole; and the end of the detection rope is connected to the short shaft hole.

[0022] One end of the trigger tension spring is connected to the car, and the other end of the trigger tension spring is connected to the short shaft hole; the end of the detection rope is connected to the short shaft hole; the arrangement is more convenient.

[0023] Preferably, a guide tube is provided on the trigger rope sleeve.

[0024] The guide tube can guide and protect the trigger rope, and the trigger rope can slide smoothly in the guide tube.

[0025] Preferably, a micro switch is provided at the end of the second short shaft away from the lifting rod, and the trigger head of the micro switch abuts against the second short shaft.

[0026] The micro switch can detect the working status of the second short shaft. Once the second short shaft moves, the detection switch can detect it in time, causing an alarm to sound in the car.

[0027] Compared with the prior art, the present invention has the following beneficial effects: (1) The brake trigger device and the detection block act on the detection plate through the tension of the detection rope, so that the detection plate remains balanced. When the detection block at the bottom of the car collides with an obstacle (the bottom of the car or the bottom of the shaft), the tension of the detection block on the detection rope decreases or disappears, and the detection plate loses balance at this time. The detection plate rotates, and the brake trigger device is triggered. The brake trigger device triggers the brake block of the safety clamp, and the brake block holds the slide rail in the shaft to brake the car. The above steps can serve as the last protective barrier for the operation of the elevator, and can quickly and reliably trigger the safety clamp in the event of an emergency in the car, ensuring the safe operation of the elevator; (2) When the detection block just touches the obstacle, the detection block is in the warning position, and the detection pressure plate rotates immediately, causing the detection pressure plate to act on the detection switch. The detection switch is a normally closed switch, so that the detection switch is turned on and the brake system in the car is started, thereby achieving slow braking of the car; and if the obstacle continues to approach the detection block and reaches the limit position, emergency braking is required, which triggers the tension spring to pull the second short shaft to rotate upward to achieve braking of the safety clamp. Therefore, before the detection block or obstacle reaches the limit position, the car can already achieve slow deceleration, thereby reducing the damage to passengers caused by emergency braking of the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention.

[0029] Figure 2 yes Figure 1 A partial enlarged view of the .

[0030] Figure 3 It is a structural schematic diagram of the trigger brake device and the safety clamp synchronization mechanism of the present invention.

[0031] Figure 4 It is a schematic diagram of the cooperation between the detection pressure plate and the fixed base of the present invention.

[0032] Figure 5 It is a three-dimensional structural diagram of the fixed base of the present invention.

[0033] Figure 6 It is a three-dimensional structural diagram of a fixed base in another embodiment of the present invention.

[0034] Figure 7It is a cross-sectional view of the fixed base of the present invention.

[0035] In the figure: 1. Safety clamp; 2. detection plate, 21. detection rope, 22. detection block, 23. fulcrum, 24. guide tube; 3. brake trigger device, 31. trigger part, 32. trigger tension spring, 33. trigger rope; 4. Safety clamp synchronization mechanism, 41. Synchronous pull rod, 411. Abutment ring, 412. Adjustment nut, 42. First short shaft, 43. Second short shaft, 431. Short shaft hole, 44. Center shaft, 45. Spring baffle, 46. Micro switch; 5. Detection switch; 6. fixed base, 61. positioning hole, 62. sliding hole, 621. opening slot; 7. switch fixing seat, 71. fixing rod, 72. positioning block, 73. positioning spring; 8. Car. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Example 1: Reference Figures 1 to 4 As shown, an anti-collision device for a twin elevator comprises: A safety clamp 1 is arranged on the car 8, and the safety clamp 1 forms a braking cooperation with the slide rail; A detection platen 2 is arranged at the bottom of the car 8, the detection platen 2 rotates around a fulcrum 23, the detection platen 2 is connected to a detection block 22 via a detection rope 21 at a position away from the fulcrum 23, and the detection block 22 hangs down at the bottom of the car 8; A brake trigger device 3 connected to the detection pressure plate 2; The force of the brake trigger device 3 and the detection block 22 acts on the detection pressure plate 2, and the detection pressure plate 2 keeps balance; the weight block contacts the obstacle, the detection pressure plate 2 loses balance and rotates around the fulcrum 23, and the rotation triggers the brake trigger device 3, and the brake trigger device 3 triggers the safety clamp 1 to achieve braking.

[0037] In the present invention, in the initial state, the brake trigger device 3 and the detection block 22 act on the detection plate 2 through the tension of the detection rope 21, so that the detection plate 2 keeps balance. When the detection block 22 at the bottom of the car 8 collides with an obstacle (the bottom of the car 8 or the bottom of the shaft), the tension of the detection block 22 on the detection rope 21 decreases or disappears, and the detection plate 2 loses balance at this time. The detection plate 2 rotates, the brake trigger device 3 is triggered, and the brake trigger device 3 triggers the brake block of the safety clamp 1, which holds the slide rail in the shaft to brake the car 8. Through the above steps, it can be used as the last protective barrier for the operation of the elevator, and can quickly and reliably trigger the safety clamp 1 when an emergency occurs in the car 8 to ensure the safe operation of the elevator.

[0038] Example 2: Reference Figures 1 to 4 As shown, an anti-collision device for a twin elevator comprises: The safety clamp 1 arranged on the car 8 forms a braking cooperation with the slide rail in the hoistway; when the car 8 moves up and down in the hoistway, the safety clamp 1 cooperates along the slide rail in the hoistway. When an emergency occurs, the safety clamp 1 holds the slide rail tightly to stop the car 8.

[0039] The detection platen 2 is arranged at the bottom of the car 8 , and rotates around the fulcrum 23 . The detection platen 2 is connected to the detection block 22 through the detection rope 21 at a position far away from the fulcrum 23 , and the detection block 22 hangs at the bottom of the car 8 .

[0040] A brake trigger device 3 connected to the detection pressure plate 2; The force of the brake trigger device 3 and the detection block 22 acts on the detection pressure plate 2, and the detection pressure plate 2 keeps balance; the weight block contacts the obstacle, the detection pressure plate 2 loses balance and rotates around the fulcrum 23, and the rotation triggers the brake trigger device 3, and the brake trigger device 3 triggers the safety clamp 1 to achieve braking.

[0041] The detection platen 2 is connected to the bottom of the car 8 so that the detection platen 2 can rotate around the fulcrum 23. The fulcrum 23 can be set at any position of the detection platen 2, for example, it can be set at the middle position of the detection platen 2, and the detection block 22 can be connected to the detection platen 2 through the detection rope 21. In this embodiment, for the convenience of setting, one end of the detection platen 2 is hinged to the bottom of the car 8, and the hinge point between the detection platen 2 and the bottom of the car 8 is the fulcrum 23, and the other end of the detection platen 2 is connected to the detection rope 21.

[0042] In one embodiment, the trigger rope 33 is provided with a guide tube 24. The guide tube 24 can guide and protect the trigger rope 33, and the trigger rope 33 can slide smoothly in the guide tube 24.

[0043] In one embodiment, the brake trigger device 3 includes a trigger part 31, a trigger tension spring 32 and a trigger rope 33; the trigger part 31 may be in a rope or rod shape, and the trigger part 31 in this embodiment is a long rod. One end of the trigger part 31 is connected to the safety clamp 1, specifically, the trigger part 31 is connected to the brake block of the safety clamp 1. One end of the trigger rope 33 is connected to the detection platen 2, and the other end of the trigger rope 33 and the other end of the trigger part 31 are both connected to the trigger tension spring 32.

[0044] In the initial state, the trigger spring 32 is in an extended state, and there are two balance points in the present application. The first balance point is that the contraction force of the trigger spring 32 is balanced with the tension of the trigger rope 33 and the gravity of the trigger part 31; the second balance point is that the tension of the detection block 22 on the detection platen 2 and the tension of the trigger rope 33 on the detection platen 2 are balanced.

[0045] When the detection block 22 collides with an obstacle, the tension of the detection rope 21 decreases, so that the tension of the trigger rope 33 decreases, and then the trigger spring 32 contracts. The trigger spring 32 pulls the trigger part 31 to move upward, so that the trigger part 31 triggers the brake block of the safety clamp 1, and the safety clamp 1 is braked.

[0046] In addition, the trigger rope 33 and the detection rope 21 in this embodiment are both connected to the detection platen 2, and the connection positions of the trigger rope 33, the detection rope 21 and the detection platen 2 can be the same or different. The fulcrum 23 of the detection platen 2 is point O, the connection position of the detection rope 21 and the detection platen 2 is point A, and the torque of the detection rope 21 acting on the detection platen 2 through point A is T1; and the connection position of the trigger rope 33 and the detection platen 2 is point B, and the torque of the trigger rope 33 acting on the detection platen 2 through point B is T2. Therefore, the relationship between the sizes of T1 and T2 can be adjusted by adjusting the positions of point A and point B, and the positions of point A and point B can be adjusted according to actual conditions, and then the relationship between T1 and T2 can be adjusted, so that the best braking state can be achieved according to the actual conditions in different cars 8.

[0047] In one embodiment, a safety clamp synchronization mechanism 4 is further included on the car 8. In order to obtain a more stable braking force for the car 8 during emergency braking, a safety clamp 1 is usually provided on both sides of the car 8, and in order to achieve synchronous braking of the two safety clamps 1, a safety clamp synchronization mechanism is provided on the car 8 in this embodiment, that is, when an emergency occurs, the safety clamps 1 on both sides of the car 8 can achieve synchronous braking.

[0048] The safety clamp synchronization mechanism in this embodiment includes: a synchronization rod 41 and short shaft assemblies respectively arranged at both ends of the synchronization rod 41. The synchronization rod 41 is tiltedly arranged on the top of the car 8, and the short shaft assemblies at both ends are respectively connected to the triggering parts 31 of the safety clamp 1 on both sides of the car 8; the short shaft assemblies at both ends have the same structure.

[0049] The short shaft assemblies at both ends include a first short shaft 42 and a second short shaft 43; the first short shaft 42 and the second short shaft 43 are both fixedly connected to a central rotating shaft 44, the central rotating shaft 44 is disposed on the car 8, and the central rotating shaft 44 can rotate freely, and the first short shaft 42 and the second short shaft 43 cooperate to form an "L"-shaped structure through the central rotating shaft 44. The end of the first short shaft 42 away from the second short shaft is rotatably connected to the synchronous pull rod 41; the end of the second short shaft 43 away from the first short shaft 42 is connected to the trigger part 31.

[0050] In this embodiment, in order to make the structure more reasonable and convenient for layout, a short shaft hole 431 is provided on the second short shaft 43; one end of the trigger spring 32 is connected to the car 8, and the other end of the trigger spring 32 is connected to the short shaft hole 431; the end of the detection rope 21 is connected to the short shaft hole 431.

[0051] When the trigger tension spring 32 pulls the second short shaft 43 to rotate around the central rotation axis 44, the second short shaft 43 pulls the trigger part 31 on the safety clamp 1 on one side to achieve braking; at the same time, the first rotation shaft is driven to rotate through the central rotation axis 44, and the first rotation shaft rotates to pull the synchronous pull rod 41, so that the synchronous pull rod 41 pulls the second short shaft 43 on the other side, and the second short shaft 43 on the other side rotates around the central rotation axis 44 on the other side, so that the first rotation axis on the other side rotates, thereby driving the trigger part 31 of the safety clamp 1 on the other side to achieve braking.

[0052] A spring baffle 45 is provided on the car 8, a synchronous pull rod 41 is passed through the spring baffle 45, and a contact ring 411 is provided on the synchronous pull rod 41; a return spring is sleeved on the synchronous pull rod 41, and two ends of the return spring are respectively in contact with the contact ring 411 and the spring baffle 45. At the same time, an adjusting nut 412 capable of adjusting the length of the synchronous pull rod 41 is provided.

[0053] The reset spring can push the abutment ring 411 so that the synchronization rod 41 remains reset and the synchronization rod 41 remains in the initial state.

[0054] In one embodiment, a micro switch 46 is provided at the end of the second short shaft 43 away from the lifting rod, and the trigger head of the micro switch 46 abuts against the second short shaft 43. In this embodiment, the micro switch 46 is provided only on one side of the short shaft assembly, and the micro switch 46 can detect the working state of the second short shaft 43. Once the second short shaft 43 moves, the detection switch 5 can detect it in time, so that an alarm sounds in the car 8.

[0055] It should be noted that, in the specific design, it is necessary to consider the acceleration of the car 8 when starting to accelerate and stopping to decelerate, so as to adjust the compression amount of the microswitch 46 and the extension amount of the trigger spring to prevent the microswitch 46 from making false alarms and the safety clamp 1 from making false braking, so that the relevant structures in this application can operate normally.

[0056] The working principle of this embodiment is as follows: When the elevator is in normal operation, the trigger part 31 is in a relaxed state, and the safety clamp 1 slides smoothly along the slide rail in the hoistway; the tension of the trigger rope 33 and the gravity of the detection block 22 act together on the detection pressure plate 2, so that the detection pressure plate 2 remains balanced; When the detection block 22 at the bottom of the car 8 collides with an obstacle (the car 8 at the bottom or the bottom of the shaft), the tension of the detection block 22 on the detection rope 21 decreases or disappears, thereby reducing the tension of the trigger rope 33, thereby contracting the trigger spring 32, and the trigger spring 32 pulls the second short shaft 43 to rotate upward; The second short shaft 43 pulls the trigger part 31 on the safety clamp 1 on one side to achieve braking; at the same time, the first rotating shaft is driven to rotate through the central rotating shaft 44. When the first rotating shaft rotates, the synchronous pull rod 41 is pulled, so that the synchronous pull rod 41 pulls the second short shaft 43 on the other side, and the second short shaft 43 on the other side rotates around the central rotating shaft 44 on the other side, so that the first rotating shaft on the other side rotates, thereby driving the trigger part 31 of the safety clamp 1 on the other side to achieve braking.

[0057] Reset process: After an emergency situation occurs, the safety clamp 1 needs to be reset. By adjusting the adjusting nut 412, the trigger spring 32 and other components, the positions of the components can be adjusted to prepare for the next use.

[0058] The above steps can serve as the last protective barrier for the elevator operation, and can quickly and reliably trigger the safety clamp 1 when an emergency occurs in the car 8, thereby ensuring the safe operation of the elevator.

[0059] Example 3: Reference Figures 1 to 7 As shown, an anti-collision device for a twin elevator comprises: The safety clamp 1 arranged on the car 8 forms a braking cooperation with the slide rail in the hoistway; when the car 8 moves up and down in the hoistway, the safety clamp 1 cooperates along the slide rail in the hoistway. When an emergency occurs, the safety clamp 1 holds the slide rail tightly to stop the car 8.

[0060] The detection platen 2 is arranged at the bottom of the car 8 , and rotates around the fulcrum 23 . The detection platen 2 is connected to the detection block 22 through the detection rope 21 at a position far away from the fulcrum 23 , and the detection block 22 hangs at the bottom of the car 8 .

[0061] A brake trigger device 3 connected to the detection pressure plate 2; The force of the brake trigger device 3 and the detection block 22 acts on the detection pressure plate 2, and the detection pressure plate 2 keeps balance; the weight block contacts the obstacle, the detection pressure plate 2 loses balance and rotates around the fulcrum 23, and the rotation triggers the brake trigger device 3, and the brake trigger device 3 triggers the safety clamp 1 to achieve braking.

[0062] The detection platen 2 is connected to the bottom of the car 8 so that the detection platen 2 can rotate around the fulcrum 23. The fulcrum 23 can be set at any position of the detection platen 2, for example, it can be set at the middle position of the detection platen 2, and the detection block 22 can be connected to the detection platen 2 through the detection rope 21. In this embodiment, for the convenience of setting, one end of the detection platen 2 is hinged to the bottom of the car 8, and the hinge point between the detection platen 2 and the bottom of the car 8 is the fulcrum 23, and the other end of the detection platen 2 is connected to the detection rope 21.

[0063] In one embodiment, the trigger rope 33 is provided with a guide tube 24. The guide tube 24 can guide and protect the trigger rope 33, and the trigger rope 33 can slide smoothly in the guide tube 24.

[0064] In one embodiment, the brake trigger device 3 includes a trigger part 31, a trigger tension spring 32 and a trigger rope 33; the trigger part 31 may be in a rope or rod shape, and the trigger part 31 in this embodiment is a long rod. One end of the trigger part 31 is connected to the safety clamp 1, specifically, the trigger part 31 is connected to the brake block of the safety clamp 1. One end of the trigger rope 33 is connected to the detection platen 2, and the other end of the trigger rope 33 and the other end of the trigger part 31 are both connected to the trigger tension spring 32.

[0065] In the initial state, the trigger spring 32 is in an extended state, and there are two balance points in the present application. The first balance point is that the contraction force of the trigger spring 32 is balanced with the tension of the trigger rope 33 and the gravity of the trigger part 31; the second balance point is that the tension of the detection block 22 on the detection platen 2 and the tension of the trigger rope 33 on the detection platen 2 are balanced.

[0066] When the detection block 22 collides with an obstacle, the tension of the detection rope 21 decreases, so that the tension of the trigger rope 33 decreases, and then the trigger spring 32 contracts. The trigger spring 32 pulls the trigger part 31 to move upward, so that the trigger part 31 triggers the brake block of the safety clamp 1, and the safety clamp 1 is braked.

[0067] In addition, the trigger rope 33 and the detection rope 21 in this embodiment are both connected to the detection platen 2, and the connection positions of the trigger rope 33, the detection rope 21 and the detection platen 2 can be the same or different. The fulcrum 23 of the detection platen 2 is point O, the connection position of the detection rope 21 and the detection platen 2 is point A, and the torque of the detection rope 21 acting on the detection platen 2 through point A is T1; and the connection position of the trigger rope 33 and the detection platen 2 is point B, and the torque of the trigger rope 33 acting on the detection platen 2 through point B is T2. Therefore, the relationship between the sizes of T1 and T2 can be adjusted by adjusting the positions of point A and point B, and the positions of point A and point B can be adjusted according to actual conditions, and then the relationship between T1 and T2 can be adjusted, so that the best braking state can be achieved according to the actual conditions in different cars 8.

[0068] In one embodiment, a safety clamp synchronization mechanism 4 is further included on the car 8. In order to obtain a more stable braking force for the car 8 during emergency braking, a safety clamp 1 is usually provided on both sides of the car 8, and in order to achieve synchronous braking of the two safety clamps 1, a safety clamp synchronization mechanism is provided on the car 8 in this embodiment, that is, when an emergency occurs, the safety clamps 1 on both sides of the car 8 can achieve synchronous braking.

[0069] The safety clamp synchronization mechanism in this embodiment includes: a synchronization rod 41 and short shaft assemblies respectively arranged at both ends of the synchronization rod 41. The synchronization rod 41 is tiltedly arranged on the top of the car 8, and the short shaft assemblies at both ends are respectively connected to the triggering parts 31 of the safety clamp 1 on both sides of the car 8; the short shaft assemblies at both ends have the same structure.

[0070] The short shaft assemblies at both ends include a first short shaft 42 and a second short shaft 43; the first short shaft 42 and the second short shaft 43 are both fixedly connected to a central rotating shaft 44, the central rotating shaft 44 is disposed on the car 8, and the central rotating shaft 44 can rotate freely, and the first short shaft 42 and the second short shaft 43 cooperate to form an "L"-shaped structure through the central rotating shaft 44. The end of the first short shaft 42 away from the second short shaft is rotatably connected to the synchronous pull rod 41; the end of the second short shaft 43 away from the first short shaft 42 is connected to the trigger part 31.

[0071] In this embodiment, in order to make the structure more reasonable and convenient for layout, a short shaft hole 431 is provided on the second short shaft 43; one end of the trigger spring 32 is connected to the car 8, and the other end of the trigger spring 32 is connected to the short shaft hole 431; the end of the detection rope 21 is connected to the short shaft hole 431.

[0072] When the trigger tension spring 32 pulls the second short shaft 43 to rotate around the central rotation axis 44, the second short shaft 43 pulls the trigger part 31 on the safety clamp 1 on one side to achieve braking; at the same time, the first rotation shaft is driven to rotate through the central rotation axis 44, and the first rotation shaft rotates to pull the synchronous pull rod 41, so that the synchronous pull rod 41 pulls the second short shaft 43 on the other side, and the second short shaft 43 on the other side rotates around the central rotation axis 44 on the other side, so that the first rotation axis on the other side rotates, thereby driving the trigger part 31 of the safety clamp 1 on the other side to achieve braking.

[0073] A spring baffle 45 is provided on the car 8, a synchronous pull rod 41 is passed through the spring baffle 45, and a contact ring 411 is provided on the synchronous pull rod 41; a return spring is sleeved on the synchronous pull rod 41, and two ends of the return spring are respectively in contact with the contact ring 411 and the spring baffle 45. At the same time, an adjusting nut 412 capable of adjusting the length of the synchronous pull rod 41 is provided.

[0074] The reset spring can push the abutment ring 411 so that the synchronization rod 41 remains reset and the synchronization rod 41 remains in the initial state.

[0075] In one embodiment, a micro switch 46 is provided at the end of the second short shaft 43 away from the lifting rod, and the trigger head of the micro switch 46 abuts against the second short shaft 43. In this embodiment, the micro switch 46 is provided only on one side of the short shaft assembly, and the micro switch 46 can detect the working state of the second short shaft 43. Once the second short shaft 43 moves, the detection switch 5 can detect it in time, so that an alarm sounds in the car 8.

[0076] The structure of this embodiment is similar to that of Embodiment 2, except that it also includes a detection switch 5 in contact with the detection pressure plate 2; the weight is in contact with the obstacle, and the detection pressure plate 2 acts on the detection switch 5 when it rotates around the fulcrum 23.

[0077] When the detection block 22 just touches the obstacle, the detection block 22 is in the warning position, and the detection pressure plate 2 rotates immediately, so that the detection pressure plate 2 acts on the detection switch 5. The detection switch 5 is a normally closed switch, so that the detection switch 5 is turned on, and the braking system in the car 8 is started, thereby realizing slow braking of the car 8; and if the obstacle continues to approach the detection block 22 and reaches the limit position, emergency braking is required at this time, then the tension spring 32 is triggered to pull the second short shaft 43 to rotate upward, thereby realizing the braking of the safety clamp 1.

[0078] Therefore, before the detection block 22 or the obstacle reaches the limit position, the car 8 can already achieve slow deceleration, thereby reducing the damage to passengers caused by the emergency braking of the car 8.

[0079] In addition, a fixed base 6 is provided at the bottom of the car 8, and a plurality of positioning holes 61 are provided on the fixed base 6 along its length direction, and a switch fixing seat 7 cooperating therewith is provided in the positioning hole 61; the position of the switch fixing seat 7 in the positioning hole 61 is adjusted, thereby adjusting the position of the detection switch 5. The switch fixing seat 7 is inserted in the position of different positioning holes 61, and the deformation amount of the detection switch 5 when it is triggered can be adjusted.

[0080] The fixed base 6 includes a sliding hole 62 arranged along its length direction, a plurality of positioning holes 61 are arranged on one side of the sliding hole 62, and an opening groove 621 is arranged on the other side of the sliding hole 62; a fixing rod 71 is arranged in the opening groove 621, one end of the fixing rod 71 is connected to the positioning block 72, and the other end of the fixing rod 71 is provided with a switch fixing seat 7; a positioning spring 73 is sleeved on the fixing rod 71 to push the positioning block 72 to abut against the positioning hole 61. The positioning spring 73 is sleeved on the fixing, one end of the positioning spring 73 abuts against the positioning block 72, and the other end abuts against the inner wall of the sliding hole 62.

[0081] Under normal circumstances, the positioning block 72 can stably abut the positioning hole 61 under the thrust of the positioning spring 73. When the position of the positioning block 72 needs to be adjusted, the switch fixing seat 7 can be directly pulled to disengage the positioning block 72 from the positioning hole 61, and then the switch fixing seat 7 can be moved to slide the fixing rod 71 along the opening groove 621. When the positioning block 72 reaches the designated positioning hole 61, the hand is released, and the positioning block 72 is re-stuck in the positioning hole 61 under the force of the positioning spring 73. Therefore, through the above structure, the position of the detection switch 5 can be easily adjusted, and the deformation amount of the detection switch 5 when it is triggered can be easily adjusted.

[0082] It should be noted that, in the specific design, it is necessary to consider the acceleration of the car 8 when starting to accelerate and stopping to decelerate, so as to adjust the compression amount of the microswitch 46 and the extension amount of the trigger spring to prevent the microswitch 46 and the detection switch 5 from making false alarms and the safety clamp 1 from making false braking, so that the relevant structures in this application can operate normally.

[0083] The working principle of this embodiment is as follows: When the elevator is in normal operation, the trigger part 31 is in a relaxed state, and the safety clamp 1 slides smoothly along the slide rail in the hoistway; the tension of the trigger rope 33 and the gravity of the detection block 22 act together on the detection pressure plate 2, so that the detection pressure plate 2 remains balanced; When the detection block 22 at the bottom of the car 8 collides with an obstacle (the car 8 at the bottom or the bottom of the shaft), the detection block 22 is in the warning position, and the detection pressure plate 2 rotates immediately, so that the detection pressure plate 2 acts on the detection switch 5. The detection switch 5 is a normally closed switch, so that the detection switch 5 is turned on, and the braking system in the car 8 is started, thereby realizing slow braking of the car 8 (although the detection pressure plate 2 rotates at this time, pulling the trigger rope 33 to move, the second short shaft 43, because the movement margin of the second short shaft 43 is set, does not cause the second short shaft 43 to pull the trigger part 31.); If the obstacle continues to approach the detection block 22 and reaches the limit position, emergency braking is required at this time, and the trigger spring 32 is pulled to rotate the second short shaft 43 upward; The second short shaft 43 pulls the trigger part 31 on the safety clamp 1 on one side to achieve braking; at the same time, the first rotating shaft is driven to rotate through the central rotating shaft 44. When the first rotating shaft rotates, the synchronous pull rod 41 is pulled, so that the synchronous pull rod 41 pulls the second short shaft 43 on the other side, and the second short shaft 43 on the other side rotates around the central rotating shaft 44 on the other side, so that the first rotating shaft on the other side rotates, thereby driving the trigger part 31 of the safety clamp 1 on the other side to achieve braking.

[0084] Reset process: After an emergency situation occurs, the safety clamp 1 needs to be reset. By adjusting the adjusting nut 412, the trigger spring 32 and other components, the positions of the components can be adjusted to prepare for the next use.

[0085] The above steps can serve as the last protective barrier for the elevator operation, and can quickly and reliably trigger the safety clamp 1 when an emergency occurs in the car 8, thereby ensuring the safe operation of the elevator.

[0086] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. An anti-collision device for twin elevators, characterized in that: include: A safety clamp is arranged on the car, and the safety clamp forms a braking cooperation with the slide rail; A detection pressure plate is arranged at the bottom of the car, the detection pressure plate rotates around a fulcrum, the detection pressure plate is connected to a detection block through a detection rope at a position far away from the fulcrum, and the detection block hangs at the bottom of the car; A brake triggering device connected to the detection pressure plate; The force of the brake trigger device and the detection block acts on the detection pressure plate, and the detection pressure plate keeps balance; when the weight block contacts the obstacle, the detection pressure plate loses balance and rotates around the fulcrum, and the brake trigger device is triggered after rotation, and the brake trigger device triggers the safety clamp to achieve braking.

2. The anti-collision device for twin elevators according to claim 1 is characterized in that: The brake trigger device includes a trigger part, a trigger spring and a trigger rope; one end of the trigger part is connected to the safety clamp, one end of the trigger rope is connected to the detection pressure plate, and the other end of the trigger rope and the other end of the trigger part are both connected to the trigger spring; the contraction force of the trigger spring is balanced with the tension of the trigger rope; when the detection block collides with an obstacle, the tension of the trigger rope is reduced, the trigger spring contracts, and the trigger part triggers the safety clamp to achieve braking.

3. The anti-collision device for twin elevators according to claim 1 or 2, characterized in that: It also includes a detection switch in contact with the detection pressure plate; the weight block contacts the obstacle, and the detection pressure plate acts on the detection switch when rotating around the fulcrum.

4. The anti-collision device for twin elevators according to claim 3 is characterized in that: A fixed base is arranged at the bottom of the car, and a plurality of positioning holes are arranged on the fixed base along its length direction. A switch fixing seat matching with the positioning hole is arranged in the positioning hole; the position of the switch fixing seat is adjusted to the position of the positioning hole, thereby adjusting the position of the detection switch.

5. The anti-collision device for twin elevators according to claim 4 is characterized in that: The fixed base includes a sliding hole arranged along its length direction, a plurality of positioning holes are arranged on one side of the sliding hole, and an open groove is arranged on the other side of the sliding hole; a fixing rod is arranged in the open groove, one end of the fixing rod is connected to the positioning block, and a switch fixing seat is arranged at the other end of the fixing rod; a positioning spring is sleeved on the fixing rod to push the positioning block to abut against the positioning hole.

6. The anti-collision device for twin elevators according to claim 2, characterized in that: It also includes a safety clamp synchronization mechanism, which includes a synchronization rod and short shaft assemblies respectively arranged at both ends of the synchronization rod, and the short shaft assemblies at both ends of the synchronization rod are respectively connected to the trigger parts of the two safety clamps; the short shaft assembly includes a first short shaft and a second short shaft; the first short shaft and the second short shaft are both fixedly connected to the central rotating shaft; the end of the first short shaft away from the second short shaft is rotatably connected to the synchronization rod; the end of the second short shaft away from the first short shaft is connected to the trigger part.

7. The anti-collision device for twin elevators according to claim 6, characterized in that: A spring baffle is arranged on the car, a synchronous pull rod is passed through the spring baffle, and an abutting ring is arranged on the synchronous pull rod; a reset spring is sleeved on the synchronous pull rod, and two ends of the reset spring are respectively abutted against the abutting ring and the spring baffle.

8. The anti-collision device for twin elevators according to claim 6 or 7, characterized in that: A short shaft hole is arranged on the second short shaft; one end of the trigger tension spring is connected to the car, and the other end of the trigger tension spring is connected to the short shaft hole; and the end of the detection rope is connected to the short shaft hole.

9. The anti-collision device for twin elevators according to claim 2, characterized in that: A guide tube is provided on the trigger rope outer casing.

10. The anti-collision device for twin elevators according to claim 6, characterized in that: A micro switch is arranged at the end of the second short shaft away from the lifting rod, and a trigger head of the micro switch abuts against the second short shaft.

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