Car roof buffer protection method

Abstract

The invention discloses a car roof buffer protection method, which adopts a buffer protection system for buffer protection, and the buffer protection system comprises a hoistway, and a car, a telescopic mechanism, a lifting mechanism and a buffer seat which are arranged in the hoistway, and further comprises a controller, a double-roller travel switch arranged on a car door and a baffle plate arranged on a landing door, the controller is connected with the double-roller travel switch, the telescopic mechanism and the lifting mechanism; the baffle plate is correspondingly matched with the double-roller travel switch; when overhaul or maintenance operation needs to be carried out, a maintainer opens the landing door, the baffle makes contact with the double-roller travel switch and drives the double-roller travel switch to incline, and the controller controls the telescopic mechanism and the lifting mechanism after receiving an inclination signal of the double-roller travel switch, so that the buffer seat moves downwards towards the center of a hoistway; and after the overhaul or maintenance operation is finished, the maintenance personnel leave the top of the lift car and then close the landing door, the double-roller travel switch is reset and transmits a reset signal to the controller, and the controller controls the telescopic mechanism and the lifting mechanism to reset.

Description

Technical Field

[0001] The present invention belongs to the technical field of elevators, relates to car top buffer protection, and particularly relates to a car top buffer protection method. Background Art

[0002] During the daily maintenance and repair work of elevators, maintenance personnel often need to enter the top space of the elevator car to perform various operations, including but not limited to key tasks such as lubricating, checking the elevator main engine, and replacing parts.

[0003] However, this working environment often has certain safety hazards, especially when the car top space is limited or the elevator breaks down. Specifically, if the elevator car has a top collision accident during the maintenance work of the maintenance personnel, that is, the car gets out of control for some reason and runs upward at high speed, hitting the top structure of the elevator shaft, the maintenance personnel may be squeezed due to the narrow space, resulting in serious physical injuries or even death. Although such accidents are not common in the history of elevator maintenance, once they occur, the consequences are often very serious, posing a major threat to the life safety of maintenance personnel.

[0004] Therefore, how to improve the protective device for the safety of working on the top of the elevator car to ensure the life safety of maintenance personnel is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] Aiming at the above deficiencies existing in the prior art, the purpose of the present invention is to provide a car top buffer protection method, which can effectively improve the safety of working on the top of the elevator car and ensure the life safety of maintenance personnel.

[0006] The technical solution of the present invention is realized as follows: A car top buffer protection method uses a buffer protection system for buffer protection. The buffer protection system includes a shaft, a car, a telescopic mechanism, a lifting mechanism, and a buffer seat arranged in the shaft. The telescopic mechanism is horizontally arranged near the top of the shaft and one end is fixed to the inner wall of the shaft. The lifting mechanism is arranged at the other end of the telescopic mechanism. The buffer seat is arranged at the lower end of the lifting mechanism. It also includes a controller, a double-roller travel switch arranged on the car door, and a baffle arranged on the landing door. The controller is connected to the double-roller travel switch, the telescopic mechanism, and the lifting mechanism. The baffle is correspondingly arranged in cooperation with the double-roller travel switch.

[0007] When maintenance or repair work needs to be carried out, the maintenance personnel open the landing door. The baffle contacts the double-roller travel switch and drives the double rollers of the double-roller travel switch to tilt. After the controller receives the output signal of the double-roller travel switch, it controls the telescopic mechanism and the lifting mechanism, so that the buffer seat moves towards the well shaft center and downward. After the maintenance or repair work is completed, the maintenance personnel leave the top of the car and then close the landing door. The double-roller travel switch resets and transmits the reset signal to the controller, and the controller controls the telescopic mechanism and the lifting mechanism to reset.

[0008] Further, the telescopic mechanism is a hydraulic cylinder or a pneumatic cylinder.

[0009] Further, the lifting mechanism includes a motor and a transmission screw rod. The transmission screw rod is vertically arranged at the other end of the telescopic mechanism. A threaded sleeve corresponding to the transmission screw rod is provided at the other end of the telescopic mechanism. The transmission screw rod is threadedly connected to the sleeve. The motor is arranged at the top end of the transmission screw rod and is connected to the transmission screw rod. The buffer seat is arranged at the bottom end of the transmission screw rod, which is convenient for the motor to drive the transmission screw rod to rotate, thereby driving the buffer seat to lift.

[0010] Further, there are multiple buffer seats. Correspondingly, the telescopic mechanism and the lifting mechanism are arranged in one-to-one correspondence with the buffer seats. All buffer seats are located on the same horizontal plane and are evenly distributed along the well shaft.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention adjusts the position of the buffer seat by the opening and closing of the landing door to touch the double-roller travel switch. When the elevator is running normally, the buffer seat is located in the gap between the well shaft and the car, so as not to affect the normal lifting of the car. When the maintenance personnel need to enter the top of the car for maintenance work, opening the landing door will trigger the double-roller travel switch, and then control the telescopic mechanism and the lifting mechanism to adjust the position of the buffer seat, so that the longitudinal projection of the buffer seat overlaps with the upper crossbeam of the elevator. When the elevator car has a top collision accident, the buffer seat can act on the upper crossbeam of the elevator for buffer protection, thus avoiding the collision between the car and the top structure of the elevator shaft when the car runs at high speed and ensuring the life safety of the maintenance personnel.

[0012] 2. The present invention realizes the automatic buffer protection of the car top through the cooperation of components such as the double-roller flow switch, the telescopic mechanism and the lifting mechanism. The maintenance personnel only need to simply open or close the landing door to control the action and recovery of the buffer seat, without complex operations or additional safety protection measures, thus effectively improving the operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 - Structural schematic of the protection system of the present invention Figure 1 。

[0014] Figure 2- Schematic structure of the protection system of the present invention Figure 2 。

[0015] Figure 3 - Schematic diagrams of two states of the buffer seat.

[0016] Wherein: 1 - motor; 2 - transmission screw; 3 - sleeve; 4 - telescopic mechanism; 5 - controller; 6 - buffer seat; 7 - double-roller travel switch; 8 - hoistway; 9 - upper crossbeam of the elevator; 10 - elevator column; 11 - car door; 12 - landing door; 13 - baffle. Detailed implementation manners

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0018] Refer to Figure 1 、 Figure 2 and Figure 3 , a buffer protection method for the car top, which uses a buffer protection system for buffer protection. The buffer protection system includes a hoistway 8 and a car, a telescopic mechanism 4, a lifting mechanism and a buffer seat 6 arranged in the hoistway 8. The telescopic mechanism is horizontally arranged near the top of the hoistway 8 and one end is fixed to the inner wall of the hoistway 8 by expansion bolts. The lifting mechanism is arranged at the other end of the telescopic mechanism. The buffer seat 6 is arranged at the lower end of the lifting mechanism, so that the buffer seat can be lifted under the action of the lifting mechanism and horizontally move towards the center of the hoistway under the action of the telescopic mechanism.

[0019] It further includes a controller 5, a double-roller travel switch 7 arranged on the car door 11 and a baffle 13 arranged on the landing door 12. The controller 5 is connected to the double-roller travel switch 7, the telescopic mechanism and the lifting mechanism. The baffle 13 is arranged corresponding to and cooperating with the double-roller travel switch 7.

[0020] When maintenance or repair work needs to be carried out, the maintenance personnel open the landing door 12, the baffle 13 contacts the double-roller travel switch 7 and drives the double rollers of the double-roller travel switch 7 to tilt. After the controller 5 receives the output signal of the double-roller travel switch 7, it controls the telescopic mechanism and the lifting mechanism, so that the buffer seat 6 moves towards the center of the hoistway and downward; after the maintenance or repair work is completed, the maintenance personnel leave the top of the car and then close the landing door 12. The double-roller travel switch 7 resets and transmits the reset signal to the controller 5, and the controller controls the telescopic mechanism and the lifting mechanism to reset.

[0021] There is usually a support structure around the car. The support structure includes elevator columns 10 vertically arranged on the left and right sides of the car, an upper crossbeam 9 of the elevator arranged above the car, and a lower crossbeam of the elevator arranged below the car. The upper crossbeam 9 of the elevator, the lower crossbeam of the elevator and the two elevator columns 10 enclose a rectangular frame, and the car is arranged inside the rectangular frame. At the same time, in order to prevent maintenance personnel from falling, a car top guardrail is provided on the top of the elevator car.

[0022] Here, a buffer seat is arranged at the top of the hoistway, and the buffer seat is telescopically arranged in the hoistway through a telescopic mechanism. In this way, when the elevator is running normally, the buffer seat is located in the gap between the hoistway and the car, so as not to affect the normal lifting of the car. When the maintenance personnel need to enter the top of the elevator car to overhaul and maintain the elevator, the telescopic mechanism drives the buffer seat to extend. After the telescopic mechanism drives the buffer seat to extend, the longitudinal projection of the buffer seat overlaps with the upper crossbeam of the elevator, which is convenient for the buffer seat to act on the upper crossbeam of the elevator for buffer protection when the elevator car has a top collision accident, so as to avoid the collision between the car and the top structure of the elevator hoistway when the car runs at high speed and ensure the life safety of the maintenance personnel. At the same time, the buffer seat can be lifted by a lifting mechanism. When the elevator is running normally, the buffer seat is located at a higher position and in the gap between the hoistway and the car. When the maintenance personnel need to enter the top of the elevator car to overhaul and maintain the elevator, the lifting mechanism drives the buffer seat to descend. The descending height of the buffer seat is greater than the height of the guardrail on the car top, which avoids interference between the buffer protection of the protection mechanism and the guardrail on the car top, and at the same time can reserve enough buffer space for the buffer seat to further improve the buffer protection effect and ensure the life safety of the maintenance personnel.

[0023] Specifically, the lifting mechanism includes a motor 1 and a transmission screw rod 2. The transmission screw rod 2 is vertically arranged at the other end of the telescopic mechanism. A threaded sleeve 3 corresponding to the transmission screw rod 2 is arranged at the other end of the telescopic mechanism. The transmission screw rod 2 is threadedly connected with the sleeve 3. The motor 1 is arranged at the top end of the transmission screw rod 2 and connected with the transmission screw rod 2. The buffer seat 6 is arranged at the bottom end of the transmission screw rod 2, which is convenient for the motor 1 to drive the transmission screw rod 2 to rotate, so as to drive the buffer seat 6 to lift.

[0024] Specifically, there are multiple buffer seats 6. Correspondingly, the telescopic mechanism and the lifting mechanism are arranged in one-to-one correspondence with the buffer seats 6. All the buffer seats 6 are located on the same horizontal plane and are evenly distributed along the hoistway 8.

[0025] Generally, setting one buffer seat can meet the requirements. However, if the hoistway size is relatively large, for improving safety, two, three, four, etc. can be set, which is specifically set according to needs.

[0026] Specifically, the telescopic mechanism is a single-piston hydraulic cylinder or a single-piston pneumatic cylinder.

[0027] The present invention provides buffer protection. When maintenance personnel need to enter the top of the elevator car for inspection and maintenance of the elevator, the landing door will open, while the car door will not open. At this time, during the opening process of the landing door, the baffle will cooperate with the double-roller travel switch, causing the double rollers of the double-roller travel switch to tilt, thereby pushing the plunger inside the double-roller travel switch to trigger the switch, and then transmitting the signal to the controller. The controller controls the piston rod of the telescopic mechanism to extend, and at the same time controls the motor to rotate. The rotation of the motor drives the transmission screw to rotate downward. After the buffer seat is in place, the maintenance personnel can enter the top of the car for inspection and maintenance operations. The specific schematic diagram after the buffer seat is in place is shown in Figure 3 Figure (b).

[0028] When the inspection and maintenance operations of the maintenance personnel are completed, after the maintenance personnel leave the top of the elevator car, they close the landing door. The double-roller travel switch resets and transmits the reset signal to the controller. The controller controls the piston rod of the telescopic mechanism to retract, and at the same time controls the motor to reverse, driving the transmission screw to rotate back. After the buffer seat is retracted, the elevator resumes normal operation, and the maintenance personnel leave. The schematic diagram after the buffer seat is retracted is shown in Figure 3 Figure (a).

[0029] During the normal operation of the elevator, the landing door and the car door will open simultaneously, thus not triggering the double-roller travel switch, and then the buffer seat is in Figure 3 this state of Figure (a).

[0030] Finally, it should be noted that the above embodiments of the present invention are only examples for explaining the present invention, and are not limitations on the implementation modes of the present invention. For those of ordinary skill in the art, other different forms of changes and modifications can be made based on the above description. It is impossible to list all the implementation modes here. Any obvious changes or modifications derived from the technical solutions of the present invention still fall within the protection scope of the present invention.

Claims

1. A car roof buffer protection method, characterized in that: A buffer protection system is used for buffer protection, the buffer protection system includes a shaft and a car, a telescopic mechanism, a lifting mechanism and a buffer seat arranged in the shaft, the telescopic mechanism is arranged horizontally near the top of the shaft and one end is fixed to the inner wall of the shaft, the lifting mechanism is arranged at the other end of the telescopic mechanism, and the buffer seat is arranged at the lower end of the lifting mechanism; it also includes a controller, a double roller travel switch arranged on the car door and a baffle arranged on the hall door, the controller is connected with the double roller travel switch, the telescopic mechanism and the lifting mechanism, and the baffle is arranged in correspondence with the double roller travel switch; When inspection or maintenance work is required, the maintenance personnel opens the hall door, the baffle contacts the double-roller travel switch and drives the double rollers of the double-roller travel switch to tilt, and the controller controls the telescopic mechanism and the lifting mechanism after receiving the output signal of the double-roller travel switch, so that the buffer seat moves toward the center of the well and downward; after the inspection or maintenance work is completed, the maintenance personnel leaves the top of the car and closes the hall door, the double-roller travel switch is reset, and the reset signal is transmitted to the controller, and the controller controls the telescopic mechanism and the lifting mechanism to reset.

2. A car roof buffer protection method according to claim 1, characterized in that: The telescopic mechanism is a hydraulic cylinder or a pneumatic cylinder.

3. A car roof buffer protection method according to claim 1 or 2, characterized in that: The lifting mechanism includes a motor and a transmission screw, the transmission screw is vertically arranged at the other end of the telescopic mechanism, the other end of the telescopic mechanism is provided with a threaded sleeve corresponding to the transmission screw, the transmission screw is threadedly connected to the sleeve, the motor is arranged at the top end of the transmission screw and connected to the transmission screw, and the buffer seat is arranged at the bottom end of the transmission screw, so that the motor drives the transmission screw to rotate, thereby driving the buffer seat to rise and fall.

4. A car roof buffer protection method according to claim 1, characterized in that: There are a plurality of buffer seats, and correspondingly, the telescopic mechanism and the lifting mechanism are arranged one by one with the buffer seats, and all the buffer seats are located in the same horizontal plane and are evenly distributed along the shaft.

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