Patent ID: 8123096

Claim:
A driving machine comprising: a driver blade for striking a fastener; and a nose portion having formed therein an injection passage which slidably guides the driver blade, and into which the fastener is fed to be injected therefrom, wherein the nose portion comprises: a first guide member extending in an injecting direction of the fastener; a second guide member having an arcuate portion at one end thereof and rotatable around a pin extending in a direction perpendicular to the injection direction, an injection hole being at a leading end of the injection passage and defined by the first guide member and the arcuate portion of the second guide member; a positioning apparatus including a spring for urging the one end of the second guide member toward the first guide member; and an adjustable member for adjusting an amount of the rotational angle of the second guide member so that the arcuate portion is selectively fixed at one of a plurality of positions relative to the first guide member so as to change a cross section perpendicular to the injection direction of the injection hole.