| 摘要 |
An automatic device for maintaining the level of a stack of plates, mainly of the storage-battery type, in feeding devices of automatic assembly machines, comprising, according to the invention, a stack-lifting mechanism in the form of a conventional pneumatic cylinder with its both chambers being connected through suitable conduits to a source of fluid under pressure; a replaceable magazine with a stack of plates mounted on said cylinder; and a control system for automatically maintaining the level of said stack of plates, which comprises throttles introduced in said conduits, a distributing valve with one member thereof having T-grooves on one of its end faces which connect said conduits to said source of compressed fluid, a stack-level sensing means in the form of a nozzle and baffle arrangement, said baffle being adapted to interact with the uppermost plate of the stack, and said nozzle being connected by its inlet through one of said conduits to one chamber of said cylinder, and another nozzle connected by its inlet through another conduit to the other chamber of said cylinder, so that said nozzles provide for simultaneous discharge therethrough of the compressed fluid from both chambers of said cylinder, as said baffle, associated with one of said nozzles, interacts with the uppermost plate of the stack, whereby the level of said stack of plates is automatically maintained.
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