ＹＢＭ０００２５５
Ｗ ｉ ｔ ｈ ｉ ｎ １ ０ ０ ｍ ｍ
Ｎｏ ｏｐｅｎｉｎｇ
Ｆｉｔｔｉｎｇ
Ｔｏｐ ｈｏｏｋ
Ｂｏｔｔｏｍ ｈｏｏｋ
Ｓｅｃｏｎｄａｒｙ
ｓｕｐｐｏｒｔ ｃａｂｌｅ
2. Description of product
2-1. Specifications
■Working conditions Application area : Indoor and normal atmospheric conditions
Temperature range: -10 ﾟC to +50 ﾟC
2-2. Main features
■Fall prevention device
A mechanism to prevent the suspended tool/device from falling to the maximum cable
travel in case of spring breakage.
This mechanism can not prevent the tool/device from falling at all when the spring
breaks.
■Drum lock (See Chapter 4-2 "Drum lock operation")
A mechanism to lock the drum at every 1/6 turn.
This mechanism is used when removing the suspended tool/device (see Chapter 4-3) or
replacing the wire rope (see Chapter 7).
■A snap back arrest device
This device is provided to arrest Wire rope snap back in case that Wire rope is cut or
suspended tool is disengaged. As soon as Wire rope is cut, drum revolves rapidly
winding Wire rope up. The centrifugal force makes Ratchet on a spring case pushed out
and the ratchet sticks in wheel fixed on a cover, stopping the revolution of the drum.
This is not engineered to keep the machine away from Wire rope snap back in advance.
Snap back arrest device works when the length of pulled wire is between 300mm and
1300mm. Between 100m and 200m of Wire rope must be wound very fast until Snap back
arrest device works in case of the cutting.
The device is only for emergency.
3. Installation
3-1. Balancer installation
WARNING
・Install the balancer correctly.
Incorrect installation could cause personal injury or damage to the balancer or other equipment.
・Always attach a secondary support cable or chain.
It is required to protect personnel in case of failure of the top hook or the fitting.
1) Prepare a fitting that can support at least 10 times . Fig.1
the maximum capacity of the balancer .
NOTE: The fitting must have no opening as
shown in Fig. 1 to prevent the balancer
from disengaging when it swings.
2) Attach the top hook of the balancer directly to
the fitting. Check the latch is closed.
NOTE: Take care the balancer does not hit
surrounding objects.
Make the mounting height different for
each balancer to avoid collision.
3) Check the top hook can swivel freely.
NOTE: Do not fasten the top hook to the balancer
body.
4) Prepare a secondary support cable or chain that
can support at least 10 times
the maximum capacity of the balancer .
5) As shown in Fig. 1, attach an end of the secondary
support cable or chain to the balancer body,
and attach the other end to a separate fitting which does not support the balancer.
NOTE: Leave some slack in the secondary support cable or chain to allow the balancer
to rotate freely. The slack must be a suitable length so that the balancer will stop
within 100 mm when falling in case of failure of the top hook or the fitting (See Fig. 1).
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