Download - Lift System & Escalator
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LIFT SYSTEM &
ESCALATORNOR DAYANA BINTI ASMAN
04DUB10F2009
FARAH NAJWA BINTI NORDIN04DUB10F1116
NURUL SYAFIQAH BINTI RAZAK
04DUB11F2999
NURUL IZZAH BINTI RAMAINOR04DUB11F2011
NURUL FARAHIM BINTI ABD RAHMAN
04DUB11F2021
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Electrical lift/rope-geared
Components:Roping single wrap (small car),double wrap
(decrease rope slip), compensating (smooth
process)
High-tensile steel wire ropes are used and the
number of ropes for a lift are between four and
twelve.The diameters are between 9 and 19mm
and have a safety factor of 10Winding motor(Geared traction single-speed
motor & Geared traction two-speed motor &
Geared traction variable-voltage & Gearless
traction variable-voltage motor)
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Machine room- Wherever possible the machineroom should be at the top of the lift shaft,as thisposition provides the greatest effiency.The room
should be ventilated and consideration must begiven to the tranmission of sound byinsulating the concrete base of the machinefrom the walls and floor by compressed cork
slabs.An overhead lifting beam directly over themachine is required for positioning ordismantling the equipment and an access hatch
in the floor,above the landing,through which theequipment can be lowered for repair orreplacement is also required.A lockable doortothe room should be provided and adequate floor
space for controlled,floor selectors and other
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INSTALLATION METHODOn hook suspended hoist-selecta suitable
overhead support in area hoist is to be used(one capable of holding weight of hoist and its
rated load) and hang up hoist.Be cetain upper
hook is firmly seated in center of hook saddle.
On lug suspended hoist-selecta suitable
overhead support in area hoist is to be used
(one capable of holding weight of hoist and its
rated load). Mount hoist using through bolts, ofappropriate size, to fit mounting holes in
suspension lug at top of hoist frame.
On rigid mount trolley suspended hoists-the
trolley side plates must be properly spaced so
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Check Oil Level.The gear case has been filled with
oil, to the proper level at the factory.However,the oil
level should be checked before hoist is
operated.Remove pipe plug from oil filler on side ofhoist frame.Replace with supplied oil hole
cover.Check oil level by removing oil level plug (side
of frame). Observe if oil level is even with bottom of
tapped hole.If it is not,add oil.Also check load chain.Be sure it is properly lubricated.
Check Limit Stops:
Paddle limit equipped.Make sure the actuatoron the tail chain side is securely pinned to the
proper link.On single part hoists, make sure
steel actuator is pinned to the first chain link
above the lower block.Multiple part reeved
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Process of lift Press both SET buttons simultaneously. Both green
LED's should come on, and the red ALERT LEDshould flash. Hoist can now be operated through fullrange of lift.
Raise or lower hook to desired set point.It does notmatter whether upper or lower limit is set first.Press
the set button that corresponds to UP if the upperlimit is to be set first, or DOWN if the lower limit is tobe set first.The corresponding green LED should goout.
Move hook to desired upper limit if the lower limitwas previously set, or to the lower limit if the upperlimit was previously set.The LED corresponding tothe limit just set will come back on, indicating thehoist is no longer at that limit.Press the set button
that corresponds to UP if the upper limit is being set,
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Advantages:
Most popular
Moved using cables which attached to carthrough the sheaves
Sheaves connected to electric motors
(turn the elevator up and down)Ropes connected to counterweight
(conserving energy)
Rail used to guide and keep lift andcounterweight steady
More efficient and safer
Disadvantages:
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ESCALATOR SYSTEM
Definition:
An escalator is a moving staircase A conveyor transport device forcarrying people between floors of a
building. The device consists of amotor-driven chain of individual,linked steps that move up or down
on tracks, allowing the step treads
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ComponentsTop and bottom landing platforms.
The truss - The truss is a hollow metal
structure that bridges the lower and upper
landings.
The tracks - The track system is built into thetruss to guide the step chain, which
continuously pulls the steps from the bottom
platform and back to the top in an endless loop.The steps
The railing - The railing provides a convenient
handhold for passengers while they are riding
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Installation Method
A factory - assembled and tested escalator
erected as a single unit provides the
quickest and most satisfactory method of
installation. The units are usually lifted inposition by a tower crane and space is
therefore required on site for the crane and
movement of the units. Alternatively, theescalator may be divided into sections and
assembled on site. In design of the floor it is
essential to take into account the load
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Process Of Escalator The first stage of escalator construction is to establish the
design. In most cases, the secondary suppliers obtain thenecessary equipment from the primary manufacturers and
make necessary modifications for installation. Therefore, most
escalators are actually assembled at the primary manufacturer.
The tracks, step chains, stair assembly, and motorized gears
and pulleys are all bolted into place on the truss beforeshipping.
Prior to installation, the landing areas must be prepared to
connect to the escalator.There are a variety of methods for
lifting the truss assembly into place, one of which is a scissorslift apparatus mounted on a wheeled support platform. With
such a device, the upper end of the truss can be easily aligned
with and then supported by a support wall associated with the
upper landing. The lower end of the truss can be subsequentlylowered into a pit associated with the floor of the lower landing.
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Types of arrangement
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Safety Features
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Safety FeaturesDrive Chain Safety Devices - A safety device that
operates to stop the escalator if the drive chainbreaks or stretches beyond an allowable limit.
Emergency Stop Button - A button that
immediately stops the escalator in emergencysituations.
Cleat - Grooves in the Steps Floor Plate designed
to prevent feet or foreign objects from getting caught
between the Step and the Comb, or the Riser andthe Step.
Step Chain Safety Device - A safety device that
stops the escalator if the Step Chain breaks or
stretches beyond an allowable limit.
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AdvantagesHave the capacity to transport large number
of people at shorter time.
Escalators offer plenty of space too
especially when compared to an elevator or
narrow staircase.
To reduce congestion and avoid excess
waiting.
Escalators can also save energy during quiet
periods, since they can be turned off,
essentially becoming a staircase.
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Disadvantages
Escalators and moving walkways tend to
experience more accidents than elevators
because of the direct exposure of
passengers to moving elements of thesystem.
Not accessible to wheelchair users because
of 30 slope may be difficult to integrate withother movement facilities such as elevators.
One of the most expensive and largest
machines