| 摘要 |
PROBLEM TO BE SOLVED: To continuously bring all side guide rollers of a spreading clip and a guide rail into contact with by a method wherein the thickness of a spring steel belt is reduced from the central division of a flat surface-form extending in parallel with the width division of the spring steel belt, to top and bottom, both side edges. SOLUTION: The thickness of at least one spring steel belt 1a on the outside of a guide rail, is reduced from the central division 1a' which has a width (d) based on a width section 1a', to both side edges 1a'''. The thickness in the central division 1a" is made a value, e.g. from approx. 2 mm to 2.5 mm. This thickness is made smaller approx. 0.1 mm to 0.2 mm smaller than the central division 1a" to both side edges 1a'''. Thus, based on a difference in the thickness between the central division 1a" and the side edges 1a''', a gap generates to the side edges between the side surfaces of the spring steel belts 1a, and this gap elastically works by spinginess on the guide rollers 7-10 of a spreading clip, and guarantees its continuous contact. |
