| 摘要 |
A support device for use within a fastener driving tool is fixedly attached to the tool s workpiece contact el- ement so as to be movable therewith between extended and re- tracted positions. When the workpiece contact element, and the support device mounted thereon, are moved to the re- tracted position, a pocket or recessed portion of the sup- port device will envelop a tip portion of a second uppermost fastener disposed within the tool magazine, while the first uppermost fastener is disposed within the tool drive bore, such that the.second uppermost fastener, as well as the re- maining fasteners within the magazine, is properly supported and stabilized such that shock and vibrational forces, at- tendant the driving of the first uppermost fastener, are ef- fectively prevented from being transmitted to the second up- permost,and remaining fasteners. In addition, the pocket or recessed portion serves to partially close the magazine op- ening through which the fasteners are serially advanced such that the first uppermost fastener will be maintained coaxi- ally aligned within the tool drive bore, and an upstream leading edge of the pocket or recessed portion also defines a shearing edge for properly shearing those portions of the collation strip which interconnect adjacent pairs of the fasteners within the collated strip of fasteners.
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