Page 303 - Ship Construction.DJ Eyres 6Ed

Ch25-H8070.fm Page 292 Wednesday, October 18, 2006 7:00 AM
292 Ship Construction

Stowed position Car deck

Position at car deck level
(cars would be on here)
Loading position (to car deck)
FIGURE 25.2าเท่านั้น---

งานห้องสมุด ศูนย์ฝกพาณิชย์นาวี

Down
Vehicle ramp

--- ใช้เพื่อการศึกษ
PLAN VIEW OF RAMP Car deck

being affected by the lifting and lowering wire purchases which are led to
hydraulic winches. ึ

Side Doors and Loaders
Side door/ramps are available for ro-ro operations and are similar to stern
door/ramp installations. Most side door installations, however, are intended
for quayside fork lift operations with palletized cargo being loaded onto a
platform at the door by the quayside forklift and stowed in the ship by
another forklift truck. Instead of a loading platform on ships trading to
ports with high tidal ranges a ramp onto which the quayside forklift truck
drives may be fitted. Elevator platforms may be fitted immediately inboard
of the side door to service various tween decks and the hold. A particular
type of elevator system is that developed for the transportation of paper
products especially newsprint. The quayside forklift places the newsprint
rolls on the height-adjustable loading platform which together with the
elevator platform is fitted with roller conveyors. Movement of the roller
conveyors is automatic, the newsprint rolls being transferred from the load-
ing platform to the elevator platform which travels to the pre-selected deck
or hold level for unloading (see Figure 25.4).
Upward folding doors with hydraulic cylinders actuating the hinge are
usually fitted to the side opening, the load platform being fitted inside the
door and hinged at the bottom of the opening, automatically being lowered