The pallet trucks with operator's platform in the Crown WT 3000 range are designed for the transport of goods within plants, particularly on loading ramps and in warehouses. Since the floor surfaces of these areas often exhibit irregularities that can lead to the operator being subjected to unpleasant shocks and vibration, particular attention was paid during development to high stability and good damping for the operator.
Standards relevant to pallet trucks can be found on ErgoNoRA by use of the following search Terms:
The Technical Report ISO/TR 22100-3 describes how ergonomic principles can be applied during the risk reduction process according to ISO 12100 and how ergonomics standards can be applied to machinery. It helps designers take decisions with respect to ergonomics during the machine design process and can also be used when no relevant type C standards are available.
In the interests of speed and convenience, electric pallet trucks are sometimes equipped with driver's platforms, typically in the loading and unloading area. This speeds up processes without compromising the pallet truck's flexibility. As a result however, the driver is subjected to greater stresses in the form of shock and vibration, particularly when ridges and loading ramps must be negotiated.
Crown's Flexride(TM) driver's platform has a decoupled suspension that is connected to the machine body through a spring and shock absorber system, in addition to the main vehicle suspension. This system absorbs more shocks that would otherwise be transmitted to the driver. Ideal damping is achieved by the facility for the spring strength to be adjusted to the weight of the driver.