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发明公开
CN1558809A 工件支架 无效 - 撤回

工件支架
摘要：
一种工件支架，具有向该空气通路(41)供给加压气体的加压气体供给机构(6)，增压活塞构件(10)的结构是分割成横截状的分割构造，在增压活塞构件(10)的第1活塞构件(52)的下面，形成有从加压气体供给机构(6)通向空气通路(41)的空气通路用的多个槽部(54)，在使增压活塞构件(10)朝下方移动时，利用加压气体强制性地只对增压活塞构件(10)的第2活塞构件(53)进行驱动，其次，利用套筒体(9)的弹性复位使第1活塞构件(52)向下方移动，因此，可消除通向外周侧油压室(39)的环状油室(57)的负压，防止空气和加压气体的侵入。由此，本发明可消除与外周侧油压室连通的油室的负压、具有可靠性优良的支承功能。
摘要（英）：

A work support provided with a highly reliable support function by eliminating negative pressure of an oil chamber communicating with an oil chamber on the outer circumferential side. Since a mechanism (6) for supplying pressurized air to an air passage (41) is provided, a pressure increasing piston member (10) has a transversely split structure, and a plurality of air-passing grooves (54) communicating between the air passage (41) and the pressurized air supply mechanism (6) are made in the lower surface of the first piston member (52) of the pressure increasing piston member (10), only the second piston member (53) of the pressure increasing piston member (10) is driven forcibly with pressurized air when the pressure increasing piston member (10) is moved downward and then the first piston member (52) is moved downward through resilient reset of a sleeve body (9). Consequently, negative pressure in an annular oil chamber (57) communicating with an oil chamber (39) on the outer circumferential side is eliminated and intrusion of air or pressurized air can be prevented.

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