| 摘要 |
The present invention is an improved loose tenon joint with multiple arculate mortise surfaces and similarly configured loose tenon member for woodworking applications. A jig is provided arranged to be secured to a workpiece where the jig axially guides a drill bit for boring a series of adjoining holes forming a mortise. The first jig embodiment manipulates a slidable guide bar maintaining longitudinally spaced drill guide holes and two index holes. A hand held drill is used to bore a series of holes (fixtured by the drill guide holes) into the workpiece. A second series of holes are bored (completing the mortise) after the drill guide is translated and secured to the second index hole. A second embodiment is provided including a stationary jig body arranged to be secured to a workpiece. An elongated opening in the jig body supports a drill guide with longitudinally spaced drill guide holes. A hand held drill is used to bore a series of holes (fixtured by the drill guide holes) into the workpiece. The first drill guide is replaced by a second drill guide with preset hole spacing where a second series of holes are bored, completing the mortise. Both embodiments provide multiple guide holes for fast drilling with full drill bit contact area and preset hole spacing to produce a uniform and accurate mortise for a strong loose tenon joint system.
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