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11-5 Synchronizing chain break safety device
1. Periodically apply grease to the catch gear shaft.
2. Check the safety rod for scratches or bends. Replace the safety rod if scratched or bent.
3. Ensure that the catch gear head is at the normal position on the chain.
4. Periodically apply rustproof grease to the leaf chain.
5. Periodically check the catch gear for normal function.
11-6 Rollers
1. Check for smooth rotation. Check for wear.
11-7 Rust
1. Check for rust.
⇒
If any rust is detected, remove it and apply repair coating.
Carefully check the posts, the carriages, and the arms.
1. Remove the safety rod from the
catch gear.
2. Raise the lift slightly under no
load condition. Place a wood
board under the driven carriage
and lower the lift.
3. Slacken the chain to check the
catch gear for smooth rotation.
4. If no tilt occurs smoothly, replace
the catch gear, the catch gear
shaft, and the spring immediately.
5. Be sure to replace the safety rod
back into the catch gear after
the check or replacement. If
anything has gone wrong due
to failure to comply with this,
the safety device will fail to
operate, resulting in a serious
accident. Replace the safety
rod back into the catch gear
without fail.
Method of checking the operation of the catch gear
Leaf chain
When the chain is broken
In a normal time
Catch gear
head
Catch gear
Catch gear shaft
Safety rod
