Work platform with protection against sustained involuntary operation

摘要

A work platform for a personnel lift includes a floor structure, a safety rail coupled with the floor structure and defining a personnel work area, and a control panel area. A protection envelope surrounds the control panel area and enhances protection for an operator from an obstruction or structure that may constitute a crushing hazard. In one arrangement, the protection envelope includes protection bars on either side of the control panel area extending above the safety rail relative to the floor structure. In another arrangement, the protection envelope includes a platform switch that is configured to trip upon an application of a predetermined force.

主权项

1. A work platform for a personnel lift, the work platform comprising:
a floor structure; a safety rail coupled with the floor structure and defining a personnel work area; a control panel area; a switch bar secured to the control panel area; and a platform switch assembly attached to the switch bar that is configured to trip upon an application of a first predetermined force to the platform switch assembly such that said trip is configured to send a signal to a control system of the personnel lift which modifies operation of the personnel lift, wherein the switch bar is secured to the control panel area via a shear element at each end of the switch bar, the shear element including a section that is configured to fail upon an application of a second predetermined force such that the switch bar separates from the work platform to allow an operator to pass through a space previously occupied by the switch bar prior to failing, the second predetermined force being greater than the first predetermined force.