ELEVATOR DOOR SILL PROTECTOR

PROTECTEUR DE SEUIL DE PORTE D'ASCENSEUR

English Abstract

This new mechanical device is used for elevator door sills to keep clean from
dirt using a rubber
motor belt. It is done by a rubber motor belt sliding in and out of the sill
covering the door sill when
the elevator car door is open.

Description

CA 2967955 2017-05-24
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Elevator Door Sill Protector
This invention applies to the elevator industry. Minimizing wear and tear for
single speed elevator
doors and two speed elevator doors.
Background Information
This mechanical device is designed to prevent elevator doors from getting
stuck in the elevator door
sill, because of dirt build up or other small objects such as coins or keys
being wedge in the guide
bars for an elevator door. This will cause the door to stop while opening or
closing and in some
instances, may cause the door to leave its track. This results in the elevator
being unavailable to
vertically transport individuals and goods. Elevator maintenance companies
will be required to send
an elevator technician to site to remedy a simple problem. Building owners
will experience
avoidable elevator downtime and expensive call back charges. The door operator
may incur
permanent damage with frequent derailment. The Elevator Door Sill Protector is
designed to
minimize these disruptions by placing a cover in the elevator door sill which
moves with the door
not allowing anything in the sill to interfere with the guide bars for an
elevator door.
There is no present mechanical device which shares the same practice as this
invention in the
elevator industry in Canada.
Drawings Figures
Figure 1- Side view of how the operations is applied under the elevator car
Summary of the Invention
A 1/2" wide rubber motor belt is attached to the bottom of the door, using a
small L bracket attached
by self tapping screws on both the door and the belt. Which then the rubber
motor belt goes through
a 1/2" rope thimble at the end of the elevator door sill into a 1" diameter
EMT held up under the
elevator car using 1" EMT clips or a piece of 1/4"- I" wide unistrut is
attached under the elevator car
using special unistrut clips and a bolt going through the beam located
underneath the elevator car. At
the end of the rubber motor belt is an S clip which is attached directly to
the rubber motor belt. The
S clip is then attached to a hook and eye turnbuckle with the S clip being
attached to the eye hole.

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The hook and eye turnbuckle is attached to a specially designed spring so that
the rubber belt does
not get damaged or get caught on anything in the elevator shaft. The
mechanical device is secured
under the elevator car with 2 L brackets which are attached together by nuts
and bolts. The brackets
are attached underneath the elevator car using self tapping screws or nuts and
bolts (this depends on
how thick the metal is underneath the elevator car). This invention can be
used on both single speed
and two speed elevator doors.
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