JICOSH was closed in 2008. For further information, please contact JISHA.
|
|
|
|
Case No.14
Falling along with the elevator cage resulting
from a snapped cable on a cargo elevator
|
Click Here |
[Circumstances of Incident]
The accident occurred in a warehouse
adjacent
to a plastics manufacturing plant.
This plant manufactures containers
for cup
noodles by using five plastic molding
machines
to form and process plastic sheets.
A two-story
warehouse adjacent to the plant is
used for
storing raw materials, products, product
packaging materials, etc. A cargo elevator
is installed to lift such things between
the floors.
On the day of the accident, the victim
and
his co-worker had been using one plastic
molding machine to form cup noodle
containers
from 8:00 to about 14:20, except for
one
hour taken for a lunch break. As the
supply
of plastic bags used to package these
products
was running short, the victim went
to the
warehouse to get some more. At about
14:30,
he went up to the second floor of the
warehouse
and got into the elevator with a paper
sack
containing plastic bags (weight of
2 kg).
Just as he was about to set the sack
on the
floor of the elevator cage, the cable
to
the motor driven hoisting winch suddenly
snapped.
The cage fell to the elevator pit on
the
first floor about four meters below,
and
the victim was seriously injured with
a broken
left heel bone.
|
[Causes]
The following can be cited as the causes
of this accident.
1 Because the elevator cage was not
equipped
with an emergency brake system, the
victim
fell along with the cage to the pit
on the
first floor about four meters below
when
the cable to the motor driven hoisting
winch
snapped.
2 The breaking of the cable was caused
by
the gradual cutting of wire strands
due to
abrasion as a result of repeated asymmetrical
winding during winching, making it
unable
to withstand the load at the time the
accident
occurred. It is assumed that the cause
of
this asymmetrical winding was that
the center
of the gravity of the cage and the
center
of the hoist deviated somewhat and
the guide
rail was deformed. This appeared to
be a
characteristic of this elevator, and
abrasion
and asymmetrical cable winding during
winching
had been noted in past inspection records
at this workplace.
3 Equipping elevator cages with emergency
brake systems as a safety device is
an essential
component in elevator structural standards.
Because such a system was not installed,
however, the sudden descent of the
cage could
not be stopped when the accident happened.
4 The accident report noted that neither
the manufacturer of the elevator nor
the
employer using the equipment was aware
of
these basic measures as stipulated
by law,
and therefore had neglected to ensure
compliance
with the requirements.
|
[Type of business] Other chemical industry
[Type of accident] Flying/falling objects
[Number of victims] One injury [requiring absence from work] |
|