Automatic door system of bus door
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This document discusses and compares different types of automatic door systems for buses. It describes five types: twin glider doors, folding doors, glider doors, sliding plug doors, and swing plug doors. For each type it provides a brief overview of how it works and its key features. The document concludes by comparing the advantages of each type and stating that twin glider doors are preferred because they move a short distance quickly to operate with minimal time.
Automatic door system of bus door
- 1. Higher College Of Technology March 17 Automatic Door system 2012 Conceptional Design for By MECH, N450 Waleed Alyafaie , H00089409 Mechanical Design Dr. Yiu chan
- 2. Contents Introduction .................................................................................................................................................. 3 Folding Door.............................................................................................................................................. 5 Electric Folding Door Mechanism ......................................................................................................... 5 Glider door ................................................................................................................................................ 6 Sliding plug door ....................................................................................................................................... 7 Swing plug door ........................................................................................................................................ 8 Comparison ................................................................................................................................................... 9 Reference .................................................................................................................................................... 10
- 3. Introduction: Automatic doors are the doors which open by itself when any object come close to specific area opposite the doors. In this case, no need to open the door manually with a bar or door handling. Some automatic doors are work by using a button that makes the door open. Doors like that are very important and it used in many places such as shopping malls, hospitals, universities, schools, industrial places, tracks. These days, there is no building that doesn’t have automatic doors. There are many designs for automatic doors such as slide open. Another one is consisting of panels that fold when people come approach to the door. Other type is one which swings in or out. The automatic door surely has a control system that control when to open or close the doors. The control systems have sensors which act when object come close and it can be adjusted by the customers need. If a button is provided for automatic doors, it should be in low level so it can be convenient for disable people. Another factor of automatic doors are electricity for the operation. Electricity will run the motor which open up the door. That doesn’t mean the door will be only opened by electricity. In fact, if the door fails to work due to electrical or mechanical issues, there is another manual method to open the door for safety reasons. There are also sensors that make the door stay open that’s when any object stands between the two doors so number of accidents will be reduced. This kind of safety ideas will ensure safe operation of automatic doors.
- 4. Types of automatic door system Twin glider door Figure 2 Figure 1 Twin glider doors are type of bus door systems. This kind of door system for bus is suitable for city-bus entrance and exit doorways. The door has big area of glass that let you have a nice appearance and also it shows for the driver the ultimate sideway vision as you can see in figure 1. The door leaves will be carried on steel shaft. Door leaves are also located at the bottom by bearings bolted to the step. It also suspended from the overhead mechanism.
- 5. Folding Door Figure 3 Another type of door system is folding door. This kind of system is convenient for entrance of the doors up to 950 mm wide. Folding doors are joined solidly and this kind of system is economical. Also folding door is a type of automatic doors that works by folding back in certain number of sections. Folding doors are discovered by Figure 4 Roman. Another name of folding door is accordion door or accordion partitions. Electric Folding Door Mechanism The cylinder will be used as a driving mechanism to open/close the folding door as you can see in figure 4. The advantages of this system that it has a compact
- 6. structure perfect performance and long service life, as well as with additional safety protection of against being clamped. Glider door Figure 5 Figure 6 Glider door is an automatic door that designed for small buses. It is suitable for apertures up to 750mm wide, but with a heavier shaft and larger actuator it can be used for aperture widths up to one meter. It can be shaped to fit flush with a profiled body-side, and has the advantage over a pivot door in that it does not sweep forward as it opens and so can be located closer to the front of the bus without conflict with the windscreen or front rim.
- 7. Sliding plug door Figure 7 Another type of automatic door system that is designed for low floor bus. It consists of both electrical system and mechanical system. Sliding plug door includes door operator, door shaft and door panels. The door operator consists of driving mechanism, plugging mechanism, hanging mechanism, guiding mechanism, and locking & unlocking mechanism.
- 8. Swing plug door It’s type of automatic door system. It has a remotely powered auxiliary lock mechanism, door striker, catch and manual release system for use on light to medium duty shuttle or utility vehicles. It’s include a door operator and base plate assembly, a shaft and arm assembly.
- 9. Comparison After knowing the operations and specification of the five types of automatic door systems for the bus. Twin glider door advantages are maintenance is free, very heavy duty and double glide handle guidance. Folding door also has advantages such as easy installing, locked from both sides and space saver. Disadvantages of folding door are scratching occurs on mirror surface of the folding doors, Bi- folding steel doors are very sensitive to harsh cleaners and use of ammonia based acid or alkali cleaners on folding mirror doors is very harmful. All in all, I prefer the twin glider door because the door moves in short distance which makes it fast to operate with less time.