The article has been written by K. Suresh, Deputy Managing Director Mitsubishi Elevator India Pvt. Ltd.
In today’s era of innovation and advancement, elevators have become a basic necessity for modernized multi-story buildings. Elevators are intended to save time and add ease and comfort to the current modern lifestyle. Technological upliftment has made it possible for a man to reach the top of high-rise commercial or residential buildings up to 632 meters with a speed of 20.5 meters per second.
Undoubtedly, elevators make life better and convenient, but some of the issues are very commonly faced by its users like inefficient door operations, proper levelling of elevators with the landing floor, tremors in the elevator car during operation and other issues which makes people paranoid about elevators. Keeping this in mind, Mitsubishi Electric has designed and installed some of the fastest, smoothest, most reliable elevator systems in the world.
Safety and security of the user is the most important factor, and to ensure that Mitsubishi Electric Elevators has come up with some unique safety features to prevent any mishappening and discomfort beforehand.
3D Multi-Beam Door Sensor – It is a safety device that prevents passengers from being caught by the doors, using multiple infrared light beams emitted to the hall in addition to those used for the MBS. The doors reverse and open if the beams are blocked or if a passenger or baggage is detected in the hall while the doors are closing. Detection toward the hall is deactivated immediately before the doors are completely closed.
Alarm Button – An emergency button provided on the Car Operating Panel. An alarm sounds when pressed to notify building personnel that an abnormality has occurred.
Door Load Detector (DLD) – A safety device to detect excessive load on opening or closing doors. The doors reverse when the door motor torque exceeds a certain limit.
Door Sensor Self-Diagnosis (DODA) – A function to diagnose the failure of non-contact door sensors is checked automatically, and if a problem is diagnosed, the door-close timing is delayed and the closing speed is reduced to maintain elevator service and ensure passenger safety.
Emergency Operations under Power Failure – Emergency Operations to be started under power failure. The two types of operations are Operation by Emergency Power Source (OEPS) and Operation by Mitsubishi Emergency Landing Device (MELD).
Fire Emergency Return Operation (FER) – One of the Fire Emergency Operations activated by fire signals from sensors or by a switch on the Supervisory Panel, where all cars automatically return to the Evacuation Floor to ensure passenger safety.
Primary and Secondary Wave Earthquake Emergency Return Operation (EER-P) – An Earthquake Emergency Return Operation where all cars travel to the nearest floors and the doors open to ensure passenger safety when primary waves have been detected.
Safety Door Edges (SDE) – A safety device mounted along the entire length of the car door edges that prevents passengers from being caught by the doors. If closing doors contact a passenger or other object, they reverse and open.
Safety Ray (SR) – A safety device to prevent passengers from being caught by the doors using one or two pairs of transmitters and receptors mounted on the rear surface of car doors or on both sides of the car entrance. The doors reverse and open when beams are blocked during door closing.
Hall Motion Sensor (HMS) – A safety device to prevent passengers from being caught by the doors, using infrared light is used to scan a 3D area near the open doors to detect passengers or objects.
Attentive Announcement (AAN – B) – A device that alerts passengers of improper operation such as overloading of a car, by voice or sound to the passengers inside the car.
Safety Gear – If there is any problem with the hoisting rope, such as looseness, the stopper will be activated instantly to grab the guide rail and keep the elevator from falling down.
Buffers – If the elevator exceeds it range of movement and hit the top or bottom of the shaft, these buffers reduce the shock of impact, and the car stops immediately.
Encoder – It constantly monitors the speed of the car and stops if it exceeds the specified speed.
Terminal Slow Down Switch – The elevator will stop if it travels exceeding its specified range of movement.
Entrance Door Locking Device – Entrance door is locked automatically and will not open unless the car stops at the same floor as specified.
Thicker Handrails – Handrails have been made thicker so that passengers can hold them securely as the car travels. Mitsubishi Electric Elevators with these inbuilt safety devices has tried to establish a smooth way to get rid of the taboo that has created a denial for elevators in the minds of people.
Innovative and secure elevator solutions with proper maintenance have made Mitsubishi Electric systems failproof
and efficient which has set a benchmark for the elevator industry.