Presentation; Theory Of Operation - Tractel minifor TR 10 Manual De Instalación, De Utilización Y De Mantenimiento

11. Tractel declines
®
consequences of any changes made to the unit or
removal of parts forming part of the unit.
GB
12. Tractel will only guaranty operation of the unit
®
provided it is equipped with an original Tractel
rope in accordance with the specifications indicated
in this manual.
13. Tractel declines
®
consequences resulting from disassembly of the
unit in any way not described in this manual or
repairs performed without Tractel
especially as concerns replacement of original parts
by parts of another manufacturer.
14. Tractel declines
®
consequences resulting from any unauthorized
changes or repairs to the wire rope.
15. The unit must never be used for any operations
other than those described in this manual. The unit
must never be used to handle any loads exceeding
the maximum utilization load indicated on the unit. It
must never be used in explosive atmospheres.
16. The unit must never be used for lifting people.
17. When a load is to be lifted by several units, a
technical study must first be carried out by a
qualified technician before installation of the
units. The installation must then be carried out in
compliance with the study, in particular to ensure
an even distribution of the load under appropriate
conditions. Tractel
the consequences resulting from use of a Tractel
device in combination with other lifting devices of
another manufacturer.
18. During the up-down lifting operations, the user must
always keep the load in view.
19. Never park or circulate under a load. Access to the area under the load should be indicated by signs
and prohibited.
20. To ensure safe use of the unit, it should be visually
inspected and serviced regularly. The unit must be
periodically inspected by a Tractel-approved repair
agent as indicated in this manual.
21. The wire rope must be in good condition to ensure
safe, correct operation of the unit. Discard any wire
rope which shows any signs of excess wear or
damage. The condition of the wire rope should be
checked each time before using the unit as detailed
in the "wire rope" section.
22. When the unit is not being used, it should be stored
in a location inaccessible to persons not authorized
to use the unit.
10
any responsibility for
any responsibility for
authorization,
®
any responsibility for
declines any responsi bility for
®
the 23. When using the unit, the operator must ensure
that the wire rope remains constantly tensioned by
the load, and more particularly, the operator must
ensure that the load is not temporarily snagged by
an obstacle when coming down as this could result
wire
®
in rupture of the wire rope when the load is released
from its obstacle.
24. If the unit is to be definitively removed from use,
the
make sure the unit is discarded in a way which will
prevent any possible use of the unit. All environment
protection regulations must be observed.
For professional applications, in particular if the
the
unit is to be operated by an employee, make sure
that you are in compliance with all safety at work
regulations governing installation, maintenance
and use of the equipment, and more specifically as
concerns the required inspections: verification on
commissioning by user, periodic inspections, and
inspections subsequent to disassembly or repair

1.1. Theory of operation

The minifor™ is a portable electric hoist with feed-
through wire rope for lifting and pulling operations.
The hoist implements a self-clamping drive system
providing unlimited lifting wire rope travel.
®
The drive system is formed by a pulley with a specially-
shaped groove, in which the wire rope is clamped under
the effect of the load by two swivel rollers.
A pre-clamping spring which acts on the rollers
maintains the wire rope on the pulley when no load is
attached to the system. Beyond the action of the pre-
clamping spring, the clamping action of the wire rope on
the drive pulley is proportional to the load.
The technical design of the system ensures a high
degree of safety provided the instructions given in this
manual in the section entitled "Anchoring the hoist –
Installation diagrams" are strictly observed.
The minifor™ hoist must only be used with the specific
minifor™ lifting wire rope with diameter indicated (see
specifications) to fully ensure safe, efficient use.
TRACTEL declines
®
consequences resulting from use of the hoist with a
wire rope other than the minifor™ wire rope.
Each minifor™ hoist is tested before shipment for
110 % of its maximum utilization load.
IMPORTANT
operations.

1. Presentation

any responsibility for the