| 摘要 |
<p>An arm structure for dust collectors has a bellows-type suction pipe that extends a pre-determined length from an inlet port of the dust collector to a worktable, and a suction hood connected to the suction pipe. The arm structure includes a pivotable joint connected with the inlet port of the dust collector; a suction pipe support having first, second and third links that are pivotably connected to opposite ends of a pair of connecting plates by means of pins fixed to the connecting plates, a tension spring that is elastically supported between an intermediate portion of the third link and the connecting plate, a pressing member that encloses the second link located below the first link and is fixed to the first link located above the second link, and a compression spring that selectively contacts the pressing member and is elastically installed to the second link; and supporting brackets which are connected with the pivotable support and fixed to ends of the first and second links.</p> |
