Material Handling Equipment

Thursday, January 10, 2008

Cranes

Cranes are used to move materials over variable paths within a restricted area. The major types of cranes are:

1.Jib crane
2.Bridge crane
3.Gantry crane
4.Stacker crane

1. Jib Crane
-It operates like an arm in a work area, where it can function as a manipulator for positioning tasks
-A hoist is attached to the arm for lifting

-Arm mounted on the wall or attached to a floor mounted support

-Arm can rotate 360°-The hoist can move along the arm

-The hoist can move along the arm

2. Bridge Crane


-Bridge mounted on tracks that are located on opposite walls of the facility

-Enables three-dimensional handling

-Top riding (heavier loads) or underhung (more versatile) versions of the crane

-Underhung crane can transfer loads and interface with other MHS (e.g., monorail systems)

3. Gantry Crane

-Single leg, double leg, and mobile types of gantry cranes

-Similar to a bridge crane except that it is floor supported at one or both ends instead of overhead (wall) supported

-Used to span a smaller portion of the work area as compared to a bridge crane

-The supports can be fixed in position or they can travel on runways

-Can be used outdoors when "floor" supported at both ends

4. Stacker Crane


-Similar to a bridge crane except that, instead of a hoist, it uses a mast with forks or a platform to handle unit loads

-Considered "fork trucks on a rail"

-Used for storing and retrieving unit loads in storage racks, especially in high-rise applications in which the racks are more than 50 feet high

-Can be controlled remotely or by an operator in a cab on the mast

-Can be rack supported

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by SMS at 8:08 PM |