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Falling along with the elevator cage resulting
from a snapped cable on a cargo elevator
|[Circumstances of Incident]
The accident occurred in a warehouse
to a plastics manufacturing plant.
This plant manufactures containers
noodles by using five plastic molding
to form and process plastic sheets.
warehouse adjacent to the plant is
storing raw materials, products, product
packaging materials, etc. A cargo elevator
is installed to lift such things between
On the day of the accident, the victim
his co-worker had been using one plastic
molding machine to form cup noodle
from 8:00 to about 14:20, except for
hour taken for a lunch break. As the
of plastic bags used to package these
was running short, the victim went
warehouse to get some more. At about
he went up to the second floor of the
and got into the elevator with a paper
containing plastic bags (weight of
Just as he was about to set the sack
floor of the elevator cage, the cable
the motor driven hoisting winch suddenly
The cage fell to the elevator pit on
first floor about four meters below,
the victim was seriously injured with
left heel bone.
The following can be cited as the causes
of this accident.
1 Because the elevator cage was not
with an emergency brake system, the
fell along with the cage to the pit
first floor about four meters below
the cable to the motor driven hoisting
2 The breaking of the cable was caused
the gradual cutting of wire strands
abrasion as a result of repeated asymmetrical
winding during winching, making it
to withstand the load at the time the
occurred. It is assumed that the cause
this asymmetrical winding was that
of the gravity of the cage and the
of the hoist deviated somewhat and
rail was deformed. This appeared to
characteristic of this elevator, and
and asymmetrical cable winding during
had been noted in past inspection records
at this workplace.
3 Equipping elevator cages with emergency
brake systems as a safety device is
component in elevator structural standards.
Because such a system was not installed,
however, the sudden descent of the
not be stopped when the accident happened.
4 The accident report noted that neither
the manufacturer of the elevator nor
employer using the equipment was aware
these basic measures as stipulated
and therefore had neglected to ensure
with the requirements.
|[Type of business] Other chemical industry
[Type of accident] Flying/falling objects
[Number of victims] One injury [requiring absence from work]