stacker

noun, any machine for raising individual items or bulk materials and depositing them on a stack or pile (“stacker, n.1.” OED); in the quote below, the reference is to a stacker for a stable cleaner

“He’d sometimes keep some beef cattle in there in the spring when they were calving. But then when the wind come up and blew the stacker down and twisted it all up, then that was the end of that. He had to clean it out by hand, so that it didn’t last too long after that.”