Automatic door Motor
- Mar 23, 2018 -
Automatic door can be divided into: revolving door, curved door, sliding door, emergency evacuation sliding door and swing doors, folding doors, rapid doors, and other categories automatic doors began to use in the building, is in the 20th century years later.Late 20 s, the opening up of the super market in the United States, automatic doors began to be used.In 1930, the United States Stanley rate has grown two millimeters to launch the world's first automatic door (the historical records in the New York times).Later, the world's first automatic doors brand sodom in 1945 oil pressure type, air type automatic doors widely to the market, the new main entrance of the building began to use.Has begun to appear in 1962, electric type, with the construction of city, after the field of automatic door technology is increasing every year.At the beginning, with supply buildings with power supply for motor speed control is difficult, so we have to oil pressure, air compressor speed control, transformation but due to the energy efficiency is very low, but along with the technical development of electrical control, electric control technology has been mature now, direct control of motor electric type automatic door gradually become the mainstream.Such as: all kinds of used to recognize the special automatic door control, such as: sensing automatic doors (infrared sensor, microwave induction, touch-sensitive, pedal sensor), charge automatic door, etc.
Using the pedals, photoelectric effect such as beam powered by electricity, pneumatic or hydraulic system of automatic opening and closing door leaf.
The 1st century AD, the Greek Luo Jianzao automatically open to the gate device (figure 1) is the earliest use of pneumatic and hydraulic powered automatic doors.As shown, the altar ignition is making the air expansion, 1 water into 2, water is used to rotate the shaft 3, the weight of the door open.Altar fire extinguishing, the door will automatically shut down.There are three main kinds of methods of modern automatic doors (figure 2).
(1) the foot pedal: equipped with a pressure switch under the pedal.
(2) optical beam: near the door set beam transmitting device and photoelectric sensing device.
(3) button: by hand in a similar switch button makes the doors open.Automatic door to slide, hinge, or folding methods such as opening and closing doors.In order to guard against theft, it must be equipped with special equipment at the same time, such as family with automatic door will need to furnish bearer identification equipment or TV monitor, etc., strictly limited to family outside of the staff.Automatic doors in shopping malls, hotels, restaurants, airports, railway stations, Banks, etc has been widely used.
By a variety of signal control automatic opening and closing, and running devices, sensors and the floorboard of the door body parts.(induction telescopic door see outside the gate.