| 摘要 |
In accordance with an exemplary embodiment, a lightweight hand-removable backstop structure is provided, the backstop structure having: an elongated substantially rigid structure arranged to be removably installed upon and rigidly supported in position by a backstop support of the unloading and stacking mechanism, the rigid structure having first, second and third elongated sections, with first and third sections being generally vertically arranged when the backstop structure is in use, and second section being generally horizontally arranged when the backstop structure is in use, the first section being configured to be hand-mounted upon and mechanically supported by the backstop support; the second section being disposed between and operatively rigidly interconnecting the first and third sections, the third section having at least one substantially flat large surface portion arranged to have a generally vertical orientation when the backstop structure is in use, the backstop structure, when in use, being of sufficient length in a horizontal direction such that all of the third section and at least a portion of the second section extend over at least part of a pallet positioned therebelow upon which ejected pieces of cut-to-length sheet metal are stacked as they are severed by the blanking machine and dropped into the unloading and stacking mechanism, the large flat surface portion of the third section being configured to be generally perpendicular to the direction of the advancing strips of sheet metal prior to being severed, and the backstop structure being arranged to be positioned when in use to restrain the distal edges of the severed cut-to-length pieces of sheet metal as gravity causes them to drop, whereby the pieces of sheet of sheet metal drop into a stack upon the pallet with their restrained distal edges neatly arranged in a common generally vertical plane.
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