What are some of the most widespread knowledge of lift fall disasters that are actually wrong?

Say first conclusion:

Rumor: The drop of elevator (non-freefall). The best way is to lean against the wall of the car and hold the handrail or car wall with both hands. Point toes, knees, and chin to the chest.  

Explanation: This will minimize the impact damage to the spine. The fall of the elevator (free fall), casually find a good posture for the dead, this chance is lower than two consecutive lottery tickets.

Someone once said that lying down can reduce harm (the actual situation is there is no time for you to lie down) or jump up when you fall to the end (this is a sightseeing ladder, you can see where the car is, plus someone who jumps like a superman Neural reflex).

1. There are two situations in which “the elevator falls”

  Emergency stop during elevator operation

In general, this is because the safety circuit or the door lock circuit is disconnected during operation, causing the elevator to stop in an emergency. Passengers will feel the numbness of the leg, which is caused by the overweight caused by the emergency stop of the elevator (of course it is also scared).

Failure occurred during the elevator operation. Suddenly it quickly drops / rises for a short distance and is stopped by the safety device. It automatically returns to the base station or resets the nearest floor.

The “elevator dropped down” that is misunderstood by most people is less likely to happen than buying a lottery ticket with 5 million. Instead of worrying about this, it is more likely to worry about the probability of being hit by a red light next time. (The extremely low probability of an accident is really not something human beings can grasp, or if God wants to receive you, you can go with peace of mind.)

2. Will the rope of the elevator break off?

Some articles on the Internet explain that “the sudden drop of elevators under normal circumstances is caused by the breakage of the traction elevator's steel wire rope.” It also makes people feel that the wire rope is very easy to break off...

In fact, this wire rope is not as fragile as you think. Elevator cars are pulled by steel wire ropes, and the larger the load, the more steel wire ropes are. For a typical residential building elevator, the minimum is 3 steel ropes, each steel wire The rope has about 10 small steel strands, and each steel strand has 10 steel filaments. Once broken, it will replace the entire strand. In theory, the load bearing capacity of a wire rope is enough, and there is no fear of breaking one of the two. Moreover, the probability of a complete disconnection of the wire rope is really scarce.

3, elevator free fall?

By design the elevator, unless the primary balance cable + cable + whole broken brakes all bad, can really elevator free fall, or at most about falling short distance with a relatively fast speed, automatically stops falling (Well, represents the residential elevator Once on average every day. The fact that the probability of an accident is really low is meaningless, unless one intentionally creates a problem (such as murder and intentional crime, but tossing such a complicated murder tactic will also be found in film and television works). This situation can only be met. To receive you.

4 , "When the elevator is free to fall, try to lean against the wall as far as possible"

If it is a free fall, then 10 levels or more, what position is useless, like a commandment; if only an abnormal decline, this can be buffered to avoid joint dislocation. Most of the failures caused by elevator faults are caused not by the impact of the fall, but because of the sudden fall that causes the unstable standing to fall. So if your elevator has a criminal record or is too old, take a seat on the car wall or hold the handrail when riding (usually children or old people recommend backing against the car wall because they are less likely to stand still). knee.

5. Don't try to open the door and save yourself!

Do not try to open the door to save yourself! Do not try to open the door to save yourself! Do not try to open the door to save yourself! The important thing to say three times, you never know when the elevator's automatic reset system will start, and forced opening the door will cause some safety devices to misjudgment. It's good to stay quiet and wait for someone to save.

6. When the elevator falls, “quickly press each layer of buttons” is not used at all.

If the elevator is still running and the floor buttons are useful if you press the button, it means that the elevator is not bad at all. If the elevator fails, it will automatically return to the base station to reset. At this time, pressing each floor once does not have much effect. Some elevators will approach the floor level and open the door. Most elevators will return to the base station to reset. At this time, the elevator is generally pressed. Can't floor.

7. In recent years, elevator accidents have been particularly high?

It's just the illusion brought about by media reports - after all, they like to get together and report on it. Since the escalator dropped a few days ago, it has been reported from time to time these days.

In fact, elevators have the most safety devices. Through multiple levels of safety control - the first level, wire ropes, guarantee that even if there is only one wire rope, it will not fall down; second level, speed limiter, control the elevator, the speed of the elevator is abnormal, touch the safety pliers to act, clamp rails The third stage, limit switch, has limit switches at the top and bottom of the hoistway. When the elevator goes to the top or bottom of the hoistway, the limit switch actuates and touches the traction machine to close the brake to prevent the car from continuing to move. The hydraulic buffer is installed on the pit and the top (usually the bottom) to ensure that it will not hit the ground directly when it falls (By the way, the buffer is in the middle, So don't stand in the middle oh). Even if all of the above fails, the elevator cannot be "true free-falling" and the rails and the box will have frictional resistance.

The information in this article comes from the Internet and was reorganized and edited by China Rescue Equipment Network.