Glossary


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1) Vacuum lifter

A lifting device utilizing the creation of vacuum to attach itself to an object via the use of an electric-powered extraction pump and sealed pads. Generally suspended from a hoist/crane, manipulator, balancer, or positioner.  Often attaches to the lifting mechanism by means of a bail and hook arrangement or is an integral part of the positioning and lifting mechanism.

2) Vertical Carousels

As a storage device, a vertical carousel provides for closed loop automatically controlled rotation of the basic storage unit, which in this case may be a shelf that can be subdivided into multiple bin locations. However, a shelf or a given vertical position need not be divided in order to handle large items such as a bolt of fabric or a roll of carpet. Because storage is vertical, such systems are popular when conserving floor space. Although automatic insertion and extraction of individual items or loads is possible, it is not as common as it is with horizontal carousel applications. See also Horizontal Carousels and/or AS/RS .

3) Vertical creep

Extremely slow speed movement of a scissors lift that is the result of normal, internal leakage of fluid control valves.

4) Vertical lift module

A Vertical Lift Module, or VLM is a storage system that consists of two parallel columns each of which is divided into fixed shelf locations that can hold a single storage module such as a tray or tote. The shelving locations are single deep. A tray or tote is inserted, extracted and transported between storage levels and picking locations via an elevator-like device with an automatic shuttle that travels up and down within the space between the storage columns. See also Carousels and/or AS/RS .

5) Vertical reciprocating conveyor

A conveyor that moves perpendicular to the floor and provides intermittent operation of a single load-carrying platform or cage which travels up and down on steel rails or guideways. There are many configurations of vertical reciprocating conveyors (VRCs) including those with a single mast, single rail, double mast, double rail and even models which offer incline travel versus strict vertical travel. There are also numerous platform configurations ranging from a simple flat steel surface to a powered roller conveyor deck with controls that are integrated with the controls of powered feed and take away conveyor lines at the different levels.

6) Vertical travel

The difference between the fully raised height of the platform deck and the fully closed height of the platform deck on a scissors lift.

7) Voice headset

Earphones and an attached microphone used by operators to interact with computer systems while keeping both hands free to simultaneously perform other tasks.

8) Voice recognition

The ability to receive , recognize and/or understand voice commands.  Usually associated with computer directed systems utilized for process control and data collection.

9) Walkie stacker

A power operated device controlled by an operator standing behind it, which lifts, stacks, and transports pallets.

10) Wall mounted jib crane

May also be referred to as a bracket mounted jib crane.  The wall mounted jib crane is to the wall of a building by utilizing brackets.  These brackets allow the jib to pivot from wall to wall in a given radius. Jib cranes may also be bracket mounted to columns. These jib cranes usually incorporate tie rods to add stability to the farthest point of the bridge beam.

11) Wall traveling jib crane

A traveling jib crane consisting of a fixed or moveable hoisting mechanism and operating on a runway attached to the side walls or columns of a building.

12) Warehouse

A  facility utilized to store, protect and secure items for inventory or staging for shipment.

13) Warehouse Management System

An execution system used to manage people, inventory, time, and equipment related to picking and processing customer orders.  The Warehouse Management System receives orders from the Order Management System or the Transportation Management System, then relies on rules and priorities established by the user to optimize the space and work within the four walls of the warehouse.

14) Waterfall

Descriptive term for the flanged portion of the wire mesh rack decking.  Most commonly the waterfall extends downwards over the outside face of the beam. The waterfall should extend past the radius of the beam a sufficient distance to minimize the potential for accidental displacement of the decking.

15) Weather seal

A rubber or canvas covered pad or drape that extends out from the dock face to seal the gap between the dock and the trailer's entrance.