| 摘要 |
A belt-type sander accessory adapted for operative attachment to a portable hand-held power drill. The sander accessory comprises an elongate body member open at its bottom and at one side, a drive roller and an idler roller mounted in the body member proximate opposite ends thereof, and a bearing plate assembly mounted in the body member between the two rollers; the rollers and the bearing plate assembly being oriented within the body member such that an endless belt of sandpaper may be looped around the two rollers with a portion of its length in contact with an outwardly facing bearing surface forming a part of the bearing plate assembly. The driver roller is journaled to the body member directly and the idler roller is journaled to a yoke assembly that is in turn mounted on the bearing plate assembly. Means are provided for operably coupling the drive roller to a hand-held power drill so as to permit operation of the sander by operation of the drill. A unique fulcrumnal arrangement is employed between the yoke assembly and the bearing plate assembly to permit angular adjustment, automatic tensioning and quick-release positioning of the idler roller relative to the drive roller, as well as to permit ready disassembly for repair and maintenance. The bearing plate assembly itself is of rigid box-like construction to enhance the strength characteristics of the device which is preferably made of lightweight plastic. Laterally extending pads mounted on the body member are provided to prevent gouging and uneven sanding of a workpiece during operation of the sander accessory.
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