I. Characteristics of elevator accidents
1. There are more personal injury accidents in elevator accidents, and the proportion of elevator operators and maintenance workers in casualties is large.
2. The accident rate of the elevator door system is higher, because every running process of the elevator has to go through the process of opening the door twice and closing the door twice, so that the door locks work frequently, aging fast, over time. Cause the door lock mechanical or electrical protection device action is not reliable.
Second, the causes of elevator accidents
1. The elevator maintenance unit or personnel did not strictly implement the “safety-oriented, pre-inspection and pre-maintenance, planned maintenance” principle.
2. The main reason for the accidents of elevator door system is that the door locks work frequently and age fast, which can easily cause unreliable action of the mechanical or electrical protection devices of the door locks.
3. The accident of rushing to the top or squatting to the bottom is generally due to the failure of the elevator’s brake, which is a very important part of the elevator. If the brake fails or has hidden danger, the elevator will be in a state of out-of-control.
4. Other accidents are mainly caused by the failure or unreliability of individual devices.
Emergency measures for elevator accidents
1. When the elevator stops suddenly due to interruption of power supply, elevator failure and other reasons, and passengers are trapped in the car, they should ask for help through the alarm, intercom system, cell phone or the prompting method in the elevator car, and should not act without authorization, so as to avoid accidents such as “shearing” and “falling down the well”. Do not act without authorization to avoid accidents such as “shearing” and “falling down the shaft”.
2. In order to rescue the trapped passengers, the maintenance personnel or under the guidance of professionals should be coiled car release operation. Pan car should be satin slow to carry out, especially when the car light load state up to the pan car, to prevent the counterweight focus caused by skidding. When the gearless traction machine for high-speed elevator car, should be used “gradually type”, step by step to release the brake to prevent the elevator out of control.