FIELD: mechanization of load-handling operations; safety devices. SUBSTANCE: proposed device has rigid thread, turnable lever, spring, screw mechanism with indicator and scale and electric switch. Cargo winch is mounted for turning relative of axis parallel to axis of its drum. Winch interacts by means of rigid thread with turnable lever loaded by spring installed for changing its preload by means of screw mechanism coupled with lifted cargo mass indicator, and turnable lever interacts with drive member of electric switch. EFFECT: provision of preliminary adjustment of device operation threshold. 1 dwg
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