| 摘要 |
An automatic stress plate feeder includes a generally horizontal stress plate magazine holding a series of generally flat stress plates each positioned generally vertically on edge therein. An electric motor drives the stress plates through the magazine, to drop them singly at a pickup point where they are picked up by a pair of magnetic arms and positioned generally horizontally beneath a screw gun extension. The screw gun extension includes a compression spring therein, causing it to telescope upwardly to provide clearance for each stress plate to be positioned beneath the screw gun extension and its bit. A screw feeder tube provides for the introduction of a screw into the screw gun extension, and the screw gun is compressed downwardly and operated to drive the screw through the plate positioned thereunder. The securing of the plate to the underlying structure causes the pickup arms to release the plate, whereupon they swing upwardly to pick up another plate to continue the process. The present machine enables a single roofer to distribute the plates and also to secure the plates in position as desired, without need for an additional worker to distribute the plates in a separate operation from the step of securing the plates.
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