Get
in line
Fluid
Power provides an overview of the requirements of the burgeoning bus
and coach industry and its scope in the Indian context
Our
society has come to expect high levels of safety and comfort while moving
about in public and the workplace. Global companies take measures to
avoid occupational hazards and ensure workplace safety, building owners
and transit authorities ideally should ensure the safety of the general
public entering or leaving buildings, buses or trains by implementing
adequate measures like installing automatic doors in various automobiles.
Looking at the future trends in road traffic, one will recognise that
the commercial vehicle participation will not decrease, although it
is required from the environmental and social viewpoints. The reason
is that the other means of transport (water, railway, air) do not provide
the same flexibility as the road transport. This conflict is hard to
solve, but the effect can be minimised. The commercial vehicle industry
attempts to introduce systems for vehicles, which are targeting safer
and automated resources. These pneumatic/electro-pneumatic systems work
closely with the precise requirement of operation by providing compact
modern design and ease of maintenance, and try to project and impact
their future development. The equipment outlined below, which depend
on pneumatics for its smooth functioning provide an overview of the
needs of the bus and coach industry to ensure optimum efficiency.
Door
types
The door types are an important feature of any coach or bus system.
The following types of door systems are currently in use.
1.Single or double plug
2.Pivot door
3.Inward opening glider door
4.Double and single folding door
5. Single or double outward
6.Opening plug doors using rotary actuators – pneumatic
linear actuators – electric or pneumatic
7. Pivot door using electric or pneumatic linear actuators
8. Double and single folding doors using either pneumatic or
electrical linear actuator
9.Inward opening glider door using either pneumatic or electric
linear actuator.
Shelf plates
Typically a shelf plate would consist of one or two pneumatic actuators
complete with air preparation, an associated control system and all
necessary linkages and bearings for operating the door. The selfcontained
assembly is normally situated above the door aperture.
Pneumatic units
The associated control system would be suitable for either air bleed,
direct pneumatic or electro-pneumatic operation. These include the following:
1.Single or double cylinder assemblies to allow independent opening
of each leaf of a double door
2.Are suitable for the operation of both gliding and folding
doors
....CONTD
