| 摘要 |
PROBLEM TO BE SOLVED: To save troubles of feeding a lubricant oil by an operator by automatically feeding the lubricant oil and to prevent a failure in a clamp from occurring due to a failure to feed. SOLUTION: An oil feeder 1 has a tank holder 2 and a lubricant oil tank 2. If a tool holder clamper 62 on a spindle 61 presses a patch 35 on the feeder 1, the lubricant oil filled in a pressure chamber 11 in the feeder 1 is injected from injection holes 39, etc., formed on the patch 35. The injected oil is fed to the tool holder clamper 62.
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