초록 ▼

Improvements in the guide body and nail feed mechanism of a nail driving tool, using wire collated nails, to eliminate the formation of loose pieces of collating wire and the trapping thereof under the heads of driven nails to form flags. The tool has a driver, a magazine containing a coil of nails

Improvements in the guide body and nail feed mechanism of a nail driving tool, using wire collated nails, to eliminate the formation of loose pieces of collating wire and the trapping thereof under the heads of driven nails to form flags. The tool has a driver, a magazine containing a coil of nails joined together in spaced relationship by collating wires welded to each nail, a guide body providing a drive track for the driver and the nails, and a feed pawl which advances and retracts in guideways in the guide body and has fingers engaging nails of the coil to locate the forwardmost nail thereof in the drive track. As the forwardmost nail of the coil is driven into a workpiece the collating wires break near the forwardmost nail leaving forwardly extending wire segments on the next succeeding nail. The drive track is provided with windows positioned to receive the wire segments of the forwardmost nail and bend them upwardly along the nail shank as the nail is driven. The feed pawl is provided with wide feed fingers to support the wire segments of the second nail of the coil, tending to assure breakage of the wires near the forwardmost nail and orienting the segments for receipt in the drive track windows. The pawl and the drive track are configured to prevent breakage or nicking of the segments of the second nail by the head of the forwardmost nail. The nails of the coil are spaced to assure wire segments of sufficient length.

대표청구항 ▼

In a tool for driving a nail into a workpiece, said tool having a driver shiftable through a work stroke and a return stroke, a guide body defining a drive track for said driver, a magazine, a coil of nails in said magazine, said nails of said coil having shanks arranged and maintained in parallel,

In a tool for driving a nail into a workpiece, said tool having a driver shiftable through a work stroke and a return stroke, a guide body defining a drive track for said driver, a magazine, a coil of nails in said magazine, said nails of said coil having shanks arranged and maintained in parallel, spaced, side-by-side relationship by a pair of collating wires welded to each nail shank, and a feed pawl having a pair of feed teeth thereon and being slidably mounted on said guide body and shiftable between a retracted position wherein said pair of feed teeth are located at and engage either side of the second nail of said coil and a forward position wherein the forwardmost nail of said coil is introduced into said drive track, each nail of said coil, as it becomes the second nail of said coil, having forwardly and downwardly extending segments of said collating wires formed on its shank when the forwardmost nail is driven by said driver during said work stroke and said collating wires are broken adjacent thereto, the improvement comprising means to bend said wire segments of each nail when it becomes the forwardmost nail of said coil upwardly along the shank of their respective nail during the initial portion of said drive stroke of said driver, whereby said wire segments of each nail remain affixed to the nail shank and are embedded therewith in said workpiece.