| 摘要 |
PURPOSE:To improve the holding accuracy of a supporting tube holding mechanism by providing third and fourth rollers disposed at a predetermined interval opposed to first and second rollers pivotally secured to the flat surface of a holder at a predetermined interval linearly at upper and lower positions to always maintain the holding force of the suction head supporting tube constant. CONSTITUTION:A suction head supporting tube holding mechanism has first and second rollers 5, 7 pivotally secured by fixing means 3a, 3b such as pins or shafts disposed at a predetermined interval linearly at upper and lower positions on the flat surface of a holder 1. The mechanism has third and fourth rollers 9, 11 at a predetermined interval oppositely to the first and second rollers on the same flat surface. When the supporting tube 15 of the suction head 13 is formed in a square-sectional columnar shape, the first to fourth rollers have all V-shaped sectional supporting tube holding grooves 17. The holding grooves disposed on the rollers are not limited to the V-shape, but may employ an arbitrary shape in coincidence with the profile of the supporting tube.
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