Scaffolding Hoist - Tractel

2. DESCRIPTIONFigure 22.1 Motor and Primary BrakeTIRAK ® hoists are driven by a single phase ora three phase motor, totally enclosed fancooled (TEFC) type with an electromagneticbrake. Pneumatic TIRAK ® hoists are availablealso.Dd1d2TE 1020 PwithBLOCSTOP ®BSO2.2 Gear ReducerThe gear reducer consists of a worm geardrive in connection with a spur gear, oil bathlubricated in a sealed aluminum casing.c4CADXE 301 PwithBLOCSTOP ®BSO2.3 Secondary BrakesThe BLOCSTOP ® BSO overspeed locking device(D) – hereafter called BSO secondarybrake – stops the descent immediately incase of accelerating overspeed.The BLOCSTOP ® BS/BSO overspeed andslack wire rope locking device (E) – hereaftercalled BS/BSO secondary brake –additionally provides protection against slackwire rope or primary wire rope failure, whenusing secondary wire ropes.SECONDARY BRAKES MUST ALWAYS BEATTACHED AND USED.BDCBa1c1c3c2Ac42.4 Emergency Descentwithout powerTIRAK ® hoists are equipped with a mechanicalcentrifugal braking system, permitting adescent at moderate speed in case of emergency.No handcranking is needed.2.5 Wire Rope Driving MechanismThe wire rope enters the hoist from the top, isled through by the patented driving system,and exits opposite its entry. As the wire ropeis not stored inside the hoist, its length (i. e.the possible rope travel) is unlimited on principle.The driving system is independent of the loadapplied to the wire rope. The whole mechanismis housed in an aluminum casing.CBc1c3c2Ac4a1XE 501 PXE 501 PAXE 500 PXE 701 PXE 700 PXE 721 PXE 720 PXE 1020 Pwith BLOCSTOP ® BSOTIRAK ® hoistswith BLOCSTOP ®BS/BSO on2 wire ropesystemE2.6 Wire RopeTIRAK ® hoists use a Special TIRAK ® WireRope (see chapter 4). Unless specificly specifiedin writing by the manufacturer, only thisspecial TIRAK ® Wire Rope may be used.NOTE: The manufacturer declines all responsibilityfor machines used witha wire rope other than specified bythem in writing.ABCWire rope driving mechanisma1 Stirrup adapter (X-Series)GearboxMotor with brakec1 Electric control boxc2 Push button controlc3 Electric EMERGENCY STOPc4 Emergency descent brakerelease lever (stored position)DEBLOCSTOP BSOsecondary braked1 Control leverd2 EMERGENCY STOPon the BLOCSTOPBLOCSTOP ® BS/BSOsecondary brake6