Escalator tilt reduced by 1 degree, elevator passenger safety increased by 1 point

- Aug 29, 2018-

The old topic of elevator safety has been repeatedly mentioned, indicating that the problem has not been resolved. It is difficult to change the accepted behaviors that have been cultivated in the past. However, it is difficult to change the issue involving security.


The safety issue of escalators, the first thing to mention is the "left bank" problem. Walking on an escalator in operation is very dangerous. Metro escalators and other public places escalators have higher steps than office ladders and residential stairs. The escalator height of the mall escalator is generally 21 cm, and the office ladder and residential stairs are 15 cm. People are not used to walking on high-gradient escalators, and it is easy to step on the air or the feet are not in place and fall down. Also, during the walking process, it is easy to cause an accident by colliding with other passengers.

In addition, the greater unsafe factor of the escalator is that the angle of inclination of the escalator in China is generally large, and the escalator is steep. The inclination angle of the escalator refers to the angle between the running path of the inclined section and the horizontal plane. According to the EU standard, the inclination angle of the escalator cannot exceed 30 degrees. However, for the running speed not exceeding 0.5 m per second, the lifting height does not exceed The 6-meter escalator is allowed to increase to 35 degrees.

According to the survey results of the escalators installed in domestic public places and the escalators produced by the manufacturers, the number of escalators with an inclination angle of 35 degrees is twice that of the escalators with 30 degree inclination angles. The reason is very simple. For the same lifting height, the 35-degree escalator takes up less than 30 degrees of escalator, which is smaller than the 30-degree escalator, both in terms of production cost and cost. On this issue, Zhang Lexiang, secretary general of the China Elevator Association, has long warned that he said that it is not in the shopping malls, or in public places such as subways. The tilt angle of escalators generally exceeds the 30-degree standard in Western countries. Moreover, China's subway operators often reduce exports in order to save costs. This means that the escalator is steeper, narrower and more dangerous.

In order to adapt to human mechanics and behavioral habits, China still needs to carry out technical transformation of the current escalator and reduce the angle of inclination so that all passengers will not be accidentally caused by the steep slope of the escalator. Therefore, some engineers and technicians suggested that an escalator with a smaller inclination angle than 30 degrees should be manufactured and used, which is 27.3 degrees (slower slope). Why is this angle of inclination to the nearest decimal point? The reason is that the height-to-step ratio of the walking stairs of adults in China is 16/31 cm, and the angle of conversion is 27.3 degrees. Some buildings, such as office buildings and homes, are already using stairs at this angle. If the escalator with this angle of inclination can be produced in the future and placed in a public place, the chance of accidents in the elevator will be greatly reduced. At present, the escalator with a tilt angle of 27.3 degrees in Japan has been widely used. The National Elevator Standardization Technical Committee and other relevant parties urgently need to revise and adjust the elevator safety technical standards, and can no longer wait.

In addition to the technical improvements from elevator manufacturing to suit human mechanics and to guide people to take the elevator in a scientific manner, there is also a need for safe rides and comprehensive management of elevators. Now, we have the "Special Equipment Safety Law of the People's Republic of China", but there is no safety law specifically for elevators. The Elevator Type Test Rules and the Elevator Manufacturing and Installation Safety Code, revised and implemented on July 1, 2016, are not applicable to the Elevator Safety Law for all. Some places, such as the Weifang City Elevator Safety Regulations, were implemented on January 1, 2017. They are the first elevator safety regulations in Shandong Province, which outlines the regulations for elevator installation, use, management, and ride. Whether China should introduce a national special elevator safety law is worth exploring.