MMaasst t ssyysstteem m / / DDeessiiggn n aannd d ffuunnccttiioon n / / MMaasst t ssyysstteemm 66..33
SMA-Ergo_06_2009A.fmSMA-Ergo_06_2009A.fm
Edition 2009AEdition 2009A
6 6 Mast Mast systemsystem
Design and functionDesign and function
Mast systemMast system
There are four mast There are four mast systems as standard versions, depending on the application or rsystems as standard versions, depending on the application or roofoof
height, etc.height, etc.
A telescopic mast consists of an A telescopic mast consists of an outer and inner mast, outer and inner mast, fork carriage and lift fork carriage and lift cylindercylinder. The. The
fork carriage is lifted up and down in tfork carriage is lifted up and down in the inner mast, which in turn moves up and downhe inner mast, which in turn moves up and down
in the outer mast. The lift cylinder first in the outer mast. The lift cylinder first lifts the fork carriage approx. 15 cm, and then thelifts the fork carriage approx. 15 cm, and then the
mast system follows the lifting movement.mast system follows the lifting movement.
A mast of the double telescopic type also has, in addition to an inner and A mast of the double telescopic type also has, in addition to an inner and outer mast, anouter mast, an
intermediate mast. The lifting movement is the same as for a intermediate mast. The lifting movement is the same as for a telescopic mast, and all thetelescopic mast, and all the
masts begin to move masts begin to move up (or down) simultaneously.up (or down) simultaneously.
A mast type with A mast type with free-lift function works in free-lift function works in a similar way, but with the difference that thea similar way, but with the difference that the
fork carriage moves to its top position in the inner mast before the next mast section startsfork carriage moves to its top position in the inner mast before the next mast section starts
to lift. Free-lift frames can be used to ato lift. Free-lift frames can be used to advantage in rooms with low ceilings or low doordvantage in rooms with low ceilings or low door
openings.openings.
A mast of the frA mast of the free-view type implies that the distance between the mast profiles is longer,ee-view type implies that the distance between the mast profiles is longer,
which gives better which gives better visibility.visibility.
Table 6.1Table 6.1 Mast typesMast types
DDeessiiggnnaattiioonn DDeessccrriippttiioonn
TT TTeelleessccooppiic c mmaasstt
TTVV TTeelleessccooppiic c FFrreeee--vviieew w mmaasstt
TTFFVV TTeelleessccooppiic c FFrreeee--lliifft t FFrreeee--vviieew w mmaasstt
DDTTFFVV DDoouubblle e TTeelleessccooppiic c FFrreeee--lliifft t FFrreeee--vviieew w mmaasstt
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