4-3-2
Fall-arrest device
7
4-3-3
Drum lock device
Spring Balancer Users Manual
If the spring is ruptured, this device prevents the tool (equipment) attached to the bottom hook from
falling across the entire stroke. If the spring is ruptured, the safety pin is activated from the spring casing
and interferes (collides) with the pin installed on the spring casing, stopping the rotation of the drum.
For the method of releasing the activated fall-arrest device, refer to “7-2 Releasing the fall-arrest
device”.
The fall-arrest device is not designed to prevent tools (equipment) from falling. Before
using the balancer, be sure to check that the total mass (weight) of the tool
(equipment) and the accessories is within the capacity range of the balancer.
If the spring tension is set lower than the minimum capacity, the fall-arrest device will
be activated and prevent the vertical movement of the tool (equipment). (See “0
Installation of tools (equipment) and adjustment of the spring tension”.)
You can lock the drum by setting the drum lock device. (See “6-3 Operation method of the drum lock”.)
The drum lock is used to remove the tool (equipment) attached to the bottom hook or to replace the wire
rope or the wire guide. (See “6-4-1 Method of removing the tool (equipment)”.)
4-4
Applicable standards
EN ISO 12100 : Sefety of machinery General principles for design Risk assessment risk reduciion
Machinery Directive 2006/42/EC
■
Note: Only the standard specification of this product complies with the standards. If the product is used
in combination with non-standard parts or modified by the customer, the standards may no longer
be complied with. Please note this in advance.
CAUTION
