| 摘要 |
PURPOSE: A checking device is provided to check a drill hole formed on a rack bar and to remove a chip and impurities at the same time. CONSTITUTION: When loading a rack bar(100) installing a drill hole, a guide cylinder(14) forming a hole checker(22) which installs a checker tip(24), descends so as to cover the hole part of the rack bar to prevent air from escaping. Then a hole is checked if it is stuck by supplying decompressed air to a 3 bar. An air limit(30) sensor installed between a nozzle(26) and a control valve(32), checks if the hole is processed with discharged pressure amount. Then, a solenoid valve inside the control valve supplies air to a 5 bar and the supplied air removes a chip and impurities inside the drill hole formed in the rack bar.
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