| 摘要 |
<p>PURPOSE:To prevent thin plates PWB from running out of rack grooves as a result of mutual contact and vibration of both adjacent PWBs due to warping by their weight when the PWBs are set against the rack. CONSTITUTION:A rack base 2 which has plural recessed grooves, deep enough to set therein one partial end of a PWB 1, arranged along the upper-face short side is held by a clamping bar 4, which is slidable in the longitudinal direction of the rack base 2 with the slidable-direction single face in parallel to the recessed grooves in the rack base 2 and the opposite face shaped into a wedged irregular face, and two shafts 3a, 3b which have symmetrical wedged irregular faces in contact with the clamping bar 4 to assemble tears 5 slidable along the rack short side into the recessed grooves and penetrate through both ends of the rack base 2 in the longitudinal direction. Springs a6 and springs 7b are provided for the shafts 3a. 3b between the rack base 2 and the clamping bar 4 and for the shafts 3a, 3b between the rack base 2 and the slidable bar 5, respectively.</p> |
