TELESKOPISCHE ABDECKVORRICHTUNG.

摘要

PCT No. PCT/JP89/01222 Sec. 371 Date Aug. 21, 1990 Sec. 102(e) Date Aug. 21, 1990 PCT Filed Dec. 5, 1989 PCT Pub. No. WO90/07400 PCT Pub. Date Jul. 12, 1990.A telescopic cover apparatus, which is mounted on a machine tool, includes a telescopic cover, including first to seventh cover members slidably fitted with one another, and a pantogragh drive mechanism including first to sixth parallelogrammatic link mechanisms continuously arranged in the cover extension/contraction direction. Each link mechanism includes first to fourth link members and first to fourth joints for pivotally coupling the link ends to one another. When a movable table of the machine tool moves, the first cover member fixed to a stationary saddle of the machine tool, along with the first joint of the first link mechanism, is kept at a standstill, while the seventh cover member fixed to the movable table, along with the fourth joint of the sixth link mechanism, moves in unison with the table, and the second to sixth cover members, connected to the respective fourth joints of the first to fifth link mechanisms aligned with one another, smoothly and cooperatively move in unison with these joints along guide rails.