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This article describes a mounting arrangement using shock absorbing casters for heavy machines such as printers. Resiliency is supplied by foam pads, one for compliance and another for absorbing shock.
English (United States)
This text was extracted from a PDF file.
This is the abbreviated version, containing approximately
96% of the total text.
Page 1 of 1
Pivot-Mounted Casters for Shock Load Isolation
This article describes a mounting arrangement using shock absorbing casters
for heavy machines such as printers. Resiliency is supplied by foam pads, one
for compliance and another for absorbing shock.
Shipping subjects heavy machines to high shock loads. Special packing
consisting of cushioned pallets is required for air shipments and internal blocking
for both padded van and air shipments. In addition, the machines must
accommodate uneven installation surfaces.
The arrangement shown in the figure is an economical alternative to the
expensive, presently used methods. A caster 2 is mounted on a plate 3 that
pivots about a pin 4 when installed on a machine base 5. A leveling foam pad 6
and a shock absorbing foam pad 7 are secured to the top of the plate 3. One
such arrangement is used at each corner of a machine.
The leveling foam pad 6 compresses under load of the the machine. The
compressed height permits compliance between the caster 2 and the installation
surface. When subjected to shock loads, the leveling foam pad 6 compresses
further to allow the shock absorbing foam pad 7 to dissipate the additional load.
Static and dynamic loads require foam pads having different characteristics.
Proper choice of the foam composition for each pad allows the machine to be
stable in operation and to absorb shock loads when shipped. This arrangement
not only reduces the cost associated with additional packaging but also reduces