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Elevator safety quiz, come and compare self-test!
Jul 11, 2018

Will the wire rope suddenly break?

    We all know that the elevator car is pulled by the wire rope. Then, the question is: Will the elevator wire rope suddenly break, causing the car to fall?

    correct--

    Elevator wire ropes do not break suddenly, they are often replaced before severe wear, and there are more than one elevator wire rope. The accident of falling the elevator caused by the sudden break of the wire rope will hardly occur.

    Science time -

    The wire rope for elevators is of a special grade and does not suddenly break. As the wire is used continuously, the wire rope may wear out, or due to uneven tension, after a long period of wear, a broken wire may occur. After the elevator maintenance personnel find the broken wire, the wire rope will be replaced in time. In addition, there are at least three elevator ropes. As the rated load of the elevator increases, the number of ropes will increase, and some even have eight, which can play the role of multiple insurance.


    Can the hand block when the elevator closes?

    In daily life, some people often extend their arms to block the elevator door, prevent the elevator from closing, and wait for the companions behind. Is this behavior safe?

    correct--

    When the elevator is closed, do not block it with your hands, as your hands may be caught. The elevator doors have inductive blind spots, and it is very dangerous if you do not sense your extended hand and continue to close the door. Proper use of the elevator door opening button is the best choice.

    Science time -

    Commonly used vertical elevators are divided into light curtain elevators and touch panel elevators. The light curtain elevator is equipped with infrared emitters and receivers on both sides of the elevator door to sense if there is a barrier. The touch panel elevator senses the barrier through a protruding contact plate on the elevator door. There are certain blind spots in the two elevator doors, and full coverage cannot be achieved. Not only the hand, it is not advisable to block the elevator from closing with any part of the body, it may be caught, and it is easy to cause damage and failure of the elevator door.


    Does the closing button have any effect?

    After someone enters the elevator, in order to save time, the door close button will be pressed. There is another saying on the Internet: the elevator closing button is actually a "comfort button", and it can't shorten the elevator closing time, just to give people a sense of security. Is this statement correct?

    correct--

    The effect of the elevator closing button is minimal. In the case of a short automatic door closing time, pressing the close button usually saves you 2 seconds.

    Science time -

    The elevator door closing command is not the "first priority". In the case that the elevator door is not fully open, pressing the door closing button does not function. When you press the close button, as soon as a passenger enters the elevator, the "process" of closing the door will be interrupted. The door closing time after pressing the door closing button is on average 2 seconds from the automatic door closing time set by the elevator. Foreign studies have shown that, compared with saving time, the greater effect of pressing the closing button is to let people have the feeling of “doing control” and to alleviate the anxiety when waiting.


    Why is the mirror installed in the car?

    Many elevator cars have mirrors installed. Many people think that the mirror is just an ornament, and the biggest role is to make people look good. Does the mirror installed in the car have any other effect?

    correct--

    Don't underestimate the mirror in the car. In fact, it has many functions, such as reducing claustrophobia, facilitating people with disabilities to take the elevator, and preventing thieves.

    Science time -

    The narrow space enclosed in the car is easy to create a sense of oppression, and the installation of the mirror can increase the visual space, reduce people's sense of depression, and alleviate claustrophobia. When a disabled person takes an elevator, he can see the floor display from the mirror without turning or turning the wheelchair. In addition, installing a mirror in the car can reduce the visual dead angle, improve safety and help prevent theft.


    Will jumping make the car fall?

    When taking the elevator, some children jump in the car, parents usually remind: can not jump, or the elevator will fall. Is this an alarmist?

    correct--

    The slight bounce impact time is short, the intensity is small, and the actual impact is small. However, if the beating amplitude is too large or the elevator is full when the elevator is fully loaded, the elevator wire rope may be damaged, causing the elevator to malfunction.

    Science time -

    In the elevator car, the impact of falling when jumping is very large, especially during the ascent of the elevator. When it is slightly bounced, the actual impact is small. If the beating range is too large, or if the elevator is fully loaded, even if a person jumps, the impact force will increase by geometric multiples, and resonance and other effects may occur, causing the elevator to be damaged and the personnel to be trapped.


    Why is the moment of operation dizzy?

    Some people have motion sickness, some people are seasick, and some people are dizzy. At the moment the elevator is running, some people will feel dizzy, and some will be accompanied by tinnitus. Although the process is short, it is very uncomfortable. Is this normal?

    correct--

    When the elevator is running, it will do acceleration and deceleration, causing changes in blood flow and brain pressure of the human body, which may lead to instant dizziness. This is a normal phenomenon and need not be too worried.

    Science time -

    When the elevator starts up and starts to run and stops, the blood in the head of the supplier will suddenly decrease, the intracranial pressure will decrease, and the head will have transient cerebral anemia and hypoxia. The activity of nerve cells will be affected. Influence, so it will cause dizziness. Everyone's physical condition is different, some people have a dizzy feeling, and some people have no feeling.


    Will the trapped car cause suffocation?

    In the elevator car, once trapped, many people are worried that they cannot breathe fresh air, which leads to suffocation. Is this worry redundant?

    correct--

    The elevator car is not completely closed, and there is no suffocation after being trapped. People don't have to worry. Some people are trapped and have difficulty in heartbeat and difficulty breathing. Most of them are caused by factors such as fear and high tension.

    Science time -

    National standards have strict regulations on the ventilation of elevators. Even when the ladder is trapped, the ventilation system is normally ventilated. In addition, the elevator has many moving parts, such as a gap between the car wall and the car top, fresh air can enter, enough for people to breathe. However, it should be reminded that trapped personnel should not shout for a long time, do not excessively consume physical fitness, should calm down and call the rescue call, waiting for rescue.


    Is it safer to install armrests in the car?

    It is mentioned in the method of self-rescue that the elevators are widely spread on the Internet, so that the handrail can be grasped to avoid being injured due to unstable station during the falling process. However, most cars do not have handrails. Is it necessary to install it?

    correct--

    The armrests are not standard in the elevator car. General elevator manufacturers will decide whether to install handrails according to customer requirements.

    Science time -

    When the elevator suddenly falls, the person is half-bowed and the back and the head are in line with the inner wall of the car, which can play a fixed position, with or without the influence of the handrail. Some people in the industry believe that the installation of handrails will also occupy the space in the car. If the elevator crashes rapidly, the handrail can only provide support for the person nearby, which has no effect on other passengers.


This article tags: elevator elevator safety elevator knowledge elevator installation elevator problem

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