ROTARY TABLE DEVICE FOR MACHINE TOOL
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United States of America Patent
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app pub date -
May 11, 2017
filing date -
May 12, 2016
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Abstract
A rotary table device that includes an air seal mechanism that prevents entry of foreign material into a frame by supplying compressed air to an air channel having a gap which is formed in a frame and which is defined by an outer peripheral surface of a rotating shaft and an inner peripheral surface of an accommodation hole in the frame at a side closer to a table than a bearing is, and by ejecting the compressed air from an inside of the frame. The air channel includes a storing portion that is disposed upstream from an ejection portion, the ejection portion being a most downstream side portion of the air channel, and a channel width of the storing portion is larger than a channel width of a portion of the air channel that is disposed downstream from the storing portion.
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