Due to the greater danger of construction elevators, attention should be paid to the safe use of various components during construction, problems should be found and resolved in time, to avoid delays in construction time, or even endanger the safety of construction personnel.
The main causes of the accident are as follows
01 Anti-fall Safety Device fails
Anti-fall Safety Device is an important safety protection component, that it will brake the elevator to a halt in case the brakes of motors fail and the cage fall freely. Its safety performance is closely related to the life safety of the occupants. So, when using an Anti-fall Safety Device, you must first strictly check whether it has a qualified factory test certificate. Secondly, since the qualification inspection of most Anti-fall Safety Devices is only valid for one year, the Anti-fall Safety Devices must be submitted for inspection in time during their use. However, actually, many domestic construction companies do not pay much attention to the inspection of Safety Devices, and oftenly, do not inspect according to regulations, and even the performance test of anti-fall safety devices once every three months has failed. Not realizing the seriousness of the problem until the safety accident occurred.
Therefore, in order to truly effectively prevent the construction elevator accidents, you must pay attention and do a good job of the test and regular inspection of the Safety Device.
02 Safety switch fails
The safety switch of the construction elevator includes the trapdoor limit switch, the cage door limit switch, the ground enclosure door limit switch, the upper and lower limit switches, etc., as long as there is a safety switch function. Failures are a potential safety hazard, and they may all cause danger signs or safety accidents.
03 The connection between Tie-in and Mast Section fails
Generally speaking, the operation and environment of construction projects are relatively poor. If the installer is not serious about the work, the installation of the connecting bolts of the tie-in and the mast section are missed or loose, a security accident will occur.
04 Frequent use
In the construction site, in order to meet the requirements of the construction schedule, the elevator is generally in a frequent operation state. Such long-term uninterrupted use often causes the motor to heat up and eventually fail, resulting in a safety accident. Therefore, the management staff and the driver of the elevator must consider the design of the intermittent operation of the motor, and the use of the elevator should be reasonably scheduled to ensure the safety and maximize the role of the equipment.
05 There is not floor landing door
It is necessary to set up safety protection doors for floor landing. The relevant building construction regulations require that the height of the protection door must be no less than 1.8m, and an effective interlocking device must be configured. However, many construction companies do not pay much attention to the installation and use of protective doors on elevator landing floors. Security protective doors can be opened at will, resulting in frequent accident.
06 The ground enclosure is not installed with interlocking device
In order to save construction costs, some construction enterprises did not install the interlocking device strictly in accordance with the construction regulations at the ground enclosure of the elevator. So, during operation, somebody may go into the enclosure and be under the elevator cage, the stamping safety accident will occur.
In addition, the free end height of mast is beyond the elevator specification is also prone to accidents.