Elongated-member-driving apparatus – With means to move or guide member into driving position – Fluid-contact member-feed means
Patent
1974-08-26
1976-03-30
Custer, Jr., Granville Y.
Elongated-member-driving apparatus
With means to move or guide member into driving position
Fluid-contact member-feed means
227116, B25C 104
Patent
active
039469263
ABSTRACT:
Fasteners, such as nails, tacks, screws, rivets or the like are continuously fed from a vibratory, bowl feed-type supply hopper into a vibrating delivery chute or slide from whence they are removed, one at a time, by an escapement mechanism and delivered into one end of a feed conduit that is connected at the other end to a fastener driving device. An air supply is connected to the conduit downstream from the outlet of the escapement mechanism thereby inducing a negative pressure which pulls the fasteners from the escapement mechanism and delivers them headfirst into the conduit and on to the receiving chamber of a fastener driving device. The fasteners are delivered into the receiving chamber headfirst in a rearward direction into engagement with the front end of the drive piston.
Some type of aligning means, such as a magnet or a concave indention in the front end of the drive piston or plunger axially aligns the shaft of the fastener with the barrel of the device, as the fastener is moved forwardly a prescribed distance, a microswitch deactivates the air supply in the conduit to prevent misfiring. Return of the drive piston returns the microswitch to its second position which activates the escapement mechanism to feed the succeeding fastener.
The escapement mechanism includes a sliding plate for picking off the fasteners one at a time from the delivery slide at a first position and moving them over to a second position in communication with the outlet of the escapement mechanism. A groove in the slide insures a negative pressure within the escapement mechanism at all times while the air supply is activated to insure proper feeding of the fasteners. Also the delivery slide itself is vibrated by connecting it either directly or indirectly to the pulsating motor of the vibratory type hopper to insure movement of the tacks along the delivery slide.
REFERENCES:
patent: 1263794 (1918-04-01), Neff
patent: 1703458 (1929-02-01), Ruff
patent: 1980967 (1934-11-01), DeMooy
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