| 摘要 |
PURPOSE:To reduce the breadth for fitting a bracket to a bore by providing a fitted part having a groove or projection around the whole circumference of the bore of a cylinder, and forming a fitting projection or groove to be fitted with the above groove or projection on the fitting part of the bracket. CONSTITUTION:A top clamp 20 forming one side of a bracket 19 is fixed on each side of driving beams 13a through 13c facing in the direction of movement. On the opposite face of each one side of the fitting parts 22 and 23 of the top clamp 20 and a bottom clamp 21, fitting projections 22a and 23a of which cross-sectional shape are made to have a nearly reversed V-shape are formed respectively. A fitted part 24 is provided around the whole circumference of a bore 17 in the position corresponding to the top clamp 20 of the bore 17 of a cylinder 16. On the fitted part 24, a fitting groove 24a having nearly V-shaped cross-section in which fitting projections 22a and 23a are fitted is formed.
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