D. Securites_BSO-EN_v1 08/2017
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108.2
108.3
108.1
108.1
D.7. BLOCSTOP BSO fall arrest device
D.7.1. Operation
The safety wire rope passes through a BLOCSTOP™
BSO fall arrest device (fig. D1.7). The centrifugal
weight of the BLOCSTOP™ automatically and conti-
nuously controls the transport speed of the safety wire
rope through the device. If the speed is too fast, the
BLOCSTOP™ stops the descent by gripping on the
safety wire rope.
In an emergency case, the BLOCSTOP™ can be trig-
gered by hand by pressing on the EMERGENCY STOP
button (108.2) - in particular, in the event of slow
slip-
page
of the hoist causing the platform to slope.
D.7.2. Measures to be taken immediately after
an incident
Fig. D.7.1 - BLOCSTOP™ BSO
108.1 Lever
108.2
EMERGENCY STOP button
108.3
Inspection window
CLOSED
OPEN
OPEN
Fig. D.7.2 – Open the BLOCSTOP™ BSO
The BLOCSTOP™ will engage in the following cases:
A
Platform lowers with «overspeed»,
B
Rupture of lifting wire rope or failure of hoist.
In normal operation, the lever (108.1) of the
BLOCSTOP™ must be in the «OPEN» position (fig.
D1.7).
Risk of injury by great fall due to
a safety wire rope which is not
tensioned between the suspension
and the BLOCSTOP™.
If the BLOCSTOP™ is closed when
the platform is moving up, the
safety wire rope will not be properly
tensioned and the BLOCSTOP™ will
become ineffective.
Case B :
If the BLOCSTOP™ has engaged subsequent
to rupture of the lifting wire rope or failure of the hoist:
Evacuate the operator(s).
Secure the equipment by
appropriate means so that the wire
rope or hoist can be replaced.
Case A:
If you can exclude that the lifting wire rope has
not broken or the hoist has not failed:
1. Lift the equipment (43) until you have eliminated the
load on the safety wire rope.
2. Return the lever (108.1) to the «OPEN» position
(fig. D.7.2).
3. Carefully lower the equipment to the ground while
being ready at all times to press the EMERGENCY
STOP button (108.2) of the BLOCSTOP™.
4. Before you continue working, check operation of
the BLOCSTOP™ as instructed in the following
pages.
DANGER
DANGER
