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TECHNICAL FEATURES
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1 - TRUSS
The truss is made of steel profiles welded
together as per the manufacturer’s design and
guarantees excellent resistance to flexure and
torsion stress.
The deflection, calculated under a load of 5000
N/m2, is less than 1/750 of the distance between
the supports.
Oil-tight welded steel sheet (thickness 4,0 mm)
is acting as full-lenght oil collector tray and soffit.
The escalator external sides are not cladded.
The truss rests on supports at either end which
are provided by the customer in accordance with
Tecno instructions.
Elastic supports are provided at the truss ends to
avoid direct transmission of vibration.
2 - DRIVE UNIT
The drive unit is located at the upper end of the
escalator.
The drive is produced by a special type escalator
squirrel cage type A.C. motor, switched on Star-
Delta.The motor is protected by all-round
protection.
Motor protection rating : IP 55
Insulation class : F
The motor is attached to a worm type reduction
gear - a helical gear.
The drive is transmitted from the motor/reduction
gear unit to the step drive unit through a multiplelink
roller chain. The breakage load for this easily
satisfies the required safety factors.
The escalator has a fail-safe electro-mechanical
brake for smooth stopping action.
In case of vertical rises exceeding 6 m, further to
the service brake, on emergency brake is supplied.
3 - STEPS
Dimensions: Depth 400 mm
Width 1000, 800, 600 mm
The steps are of distortion resistant design,
made of high-tensile, die-cast aluminium.
The cleating of the tread plates
guarantee a perfect fit in the combplates
at either ends of the escalator.
The step risers are also cleated vertically so
that the cleats in the riser of one step fit into
the grooves on the tread plate of the next step.
Each steps is provided with two rollers with
encased seales-for-life ball bearings.
The steps are interchangeable and are fixed to
the chain axles in such a way that they can be
removed quickly and easily without having to
dismount the chains and skirting.
In order to ensure safe entry onto and exit
from the escalator, two steps run horizontally
at both the top and bottom ends.
4 - STEP CHAINS
The step chains of the precision roller type are
made of hardened and tempered material, with
hardened and ground pins.
Each escalator has two chains, one on either
side of the step, driven by a couple of wheels on
the drive shaft in the top section of the escalator.
These are balanced by a second pair of wheels
on the transmission shaft in the bottom section
of the escalator (the step return idler sprockets).
5 - CHAIN TENSIONING DEVICE
The chain tensioning device is easily
accessible at the lower end of the escalator
after lifting off the floor covering.
The tensioning shaft rests on both sides and
runs along special guides fixed directly to the
frame of the escalator.
Two loaded springs, that can be adjusted
by means of tie-rods, guarantee the
constant tension of the step chains.
Electrical contacts check the excessive
extension or breaking of the step chains.
6 - COMBS AND COMB-PLATES
The combs are made of special cast aluminium
and are standard elements permanently fixed to
the combplates.
The combs enter the grooves in the step tread
plates and guarantee a perfect fit.
The combplates consist of a metal plate covered
in non-slip stainless steel with safety switches
that interrupt the movement of the escalator in
the event that any foreign bodies get caught
between the step and the combplates.
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7 - HANDRAIL
The handrails are made of black rubber
moulding with internal canvas and rayon
layers for extra strength. Each handrail is
driven by a pulley timed with the speed
of the steps.
The drive pulleys are housed in the top section
of the escalator and are directly driven by the
step chain drive unit via a roller chain.
The guides running along the entire length
of the escalator are formed from a special
steel profile.
The handrail tensioning device is also found
in the top section of the escalator near the
drive pulleys.
The points at which the handrail enters and
leaves the balustrade are carefully protected.
Electrical contacts stop the escalator
immediately any foreign body is detected.
8 - BALUSTRADES
The balustrades are made from panels of
safety clear glass (10 mm thick) laid
vertically and without the need for supports.
The joints between the panels are vertically
to the handrail.The panels are positioned
flush with each other, thus doing away with
the need for masking.
The inner and the outer decking balustrades,
near the skirting, are made in stainless steel
profiles (TSL type) or in silver anodized
aluminium profiles (TLL type).
9 - SKIRTING
The skirtings are rigid and made from dentresistant
stainless steel sheets with a smooth
surface facing the steps.
10 - OUTER CLADDING
The two sides and the soffit of the escalator
may, at extra cost, be encased in pressed steel
panels, treated with a primer. The panels may
alternatively be obtained from stainless steel or
other materials chosen by the customer.
11 - ELECTRICAL EQUIPMENT
The control cabinet is installed in the top
end of the escalator and is made of steel
plate, protection rating IP 54. It can be
rolled out from its seat for both front and
back easy inspection.
In addition to the main switch with its magnetothermal
protection, the control cabinet also
contains the following equipments:
- up/down travelling remote switches;
- a maintenance operation relay;
- a brake relay;
- a transformer;
- safety switches;
- full motor speed control and protection against
accidental movement inversion of the escalator.
The maintenance area at either end of the
escalator is equipped with:
- a socket outlet for connecting a hand-held
lamp;
- a socket outlet for connecting the maintenance
push-button panel (when this is inserted, all
other controls are excluded);
- a control circuit switch.
The safety switches are in series and normally
open.
Upside and downside skirting (on left hand
side) there are the key switch up/down and
the emergency stop buttons.
12 - SAFETY DEVICES
The escalators are fitted with the following
safety devices:
a) Emergency stop buttons - Push buttons
provided in the up side and the down-side
skirting (left hand side);
b) Main switch - With thermal release at the
control panel;
c) Control circuit breakers - Provided in the
upper drive station and by the motor;
d) Speed monitor - Electronic speed and step
band monitoring by initiators provided at the
motor;
e) Motor temperature monitor - Temperature
sensing device in the motor winding;
f) Step sag and lifting monitor - Feelers in the
step band at top and bottom, stop the escala
tor in case of deviations more than 4 mm;
g) Step inlet monitor - Horizontal and vertical
movement of comb carrier;
h) Step chain tension monitor - Switch with
mechanical lock for chain ten sion and chain
breakage monitoring;
i) Maintenance drive socket - Provided in
the bottom return station and at the
control cabinet;
l) Haundrail inlet control switch to protect
people
m)Steps and comb contact control switch
to prevent from foreign bodies presence
possibility between comb on steps
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