Elongated-member-driving apparatus – With means to move or guide member into driving position – Including means other than the driver to separate leading...
Patent
1983-12-28
1986-06-10
Spruill, Robert L.
Elongated-member-driving apparatus
With means to move or guide member into driving position
Including means other than the driver to separate leading...
227112, 227115, 227118, 227137, 227138, B25C 500, B25C 104
Patent
active
045938458
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a fastener-driving device intended for such fasteners as nails, screws and the like, and comprising a fastener receiving and guiding means, for receiving fasteners in a position for co-action with a fastener-driving means and for guiding said fasteners towards the intended fastener-driving location; a fastener magazine having means for guiding fasteners arranged in side-by-side relationship towards said fastener receiving and guiding means; and feed means for feeding fasteners arriving from said magazine to said receiving and guiding means one at a time, said feed means including a bifurcate member which is arranged to co-act with a guide channel arranged to guide the fasteners transversely to their direction of movement during the passage of said fasteners between said magazine and said fastener receiving and guiding means, and which member is pivotally mounted on a shaft located adjacent the guide channel, said bifurcate member including a recess which is flanked by the tines or legs of said member and the width of which recess is adapted to receive one fastener at a time, said bifurcate member, for the purpose of feeding said fasteners one at a time, being reciprocatingly pivotable from a fastener-receiving position, in which the recess is directed obliquely towards the magazine and the mouth of said recess extends across at least substantially the whole width of the guide channel, to and beyond a position in which the recess is directed obliquely towards said fastener receiving and guiding means and the mouth of said recess extends across at least substantially the whole width of the guide channel, via an intermediate position in which said recess extends transversely across the whole of said guide channel.
The object of the present invention is to provide an improved device of the aforementioned kind which is able to operate with individual fasteners, i.e. fasteners which are not mounted on tape or fixed to each other in any way, without placing high, and therewith expensive, precision requirements on the fasteners as a result thereof.
To this end, it is proposed in accordance with the invention that in a device of the kind described the recess has the form of an elongate slot or groove, the mouthdefining edges of which groove are formed by the outer ends of the tines or legs of the bifurcate member, of which mouthdefining edges the edge located nearest the magazine in the fastener-receiving position of the bifurcate member forms an acute angle with the plane of the guide channel. Such an arrangement minimizes the risk of the fasteners jamming between the guide-channel wall and the last-mentioned edge of the mouth of said groove, when the bifurcate member is pivoted from the fastener-receiving position while carrying a fastener, and obliquely arriving fasteners are effectively and, from an operational point of view, reliably aligned with and fed into the groove in said bifurcate member, through a camming action with said edge of the mouth of said groove.
So that the invention will be more readily understood and further features and advantages thereof made apparent, an exemplary embodiment of the invention will now be described with reference to the accompanying drawings, in which
FIG. 1 illustrates schematically, partly in side view and partly in section, a device according to the invention intended for driving fasteners in the form of loose nails, certain non-essential parts of the device having been omitted from the drawing, for the sake of clarity.
FIGS. 2-4 are sectional views taken substantially on the line A--A in FIG. 1, these views illustrating respectively the bifurcate member in its fastener-receiving position, its intermediate position and its fastener-delivering position, while feeding a fastener from the magazine to the fastener receiving and guiding means.
FIG. 5 illustrates the bifurcate member as seen in the direction of arrow B in FIG. 3.
FIG. 6 illustrates the bifurcate member, as seen in the cirection of the arrow C in FIG. 3.
The fastener-driving de
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"Rotary Screw Escapement", IBM Technical Disclosure Bulletin, vol. 26, No. 2, pp. 526-527, Jul. 1983.
Andersson Jonny
Lund Stellan
Ross Taylor J.
Spruill Robert L.
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