| 摘要 |
PROBLEM TO BE SOLVED: To prevent dirt due to high speed traveling and oil scattering in advance by providing radial bearings with grooves which engage with the projected parts of both sides of a guide rail respectively at the lower end of the link shaft of an endless link apparatus in the apparatus. SOLUTION: In an endless link apparatus, radial bearings 11 with grooves are set at the positions on both sides of each projected guide rails 12, 13 so that the notched grooves of an outer wheel are engaged with bearing fitting seats 10 fitted at the lower end of a link shaft, with the projected parts of the guide rails 12, 13. The guide rail 12 on the side of a sheet is fixed on a bed 16, the guide rail 13 of an anti-sheet is made to have pin joint structure, parts excluding a preheating part and a stretching part are fixed on the bed 16, the male parts of a guide moving shaft 15 supported by a pillow block 14 are inserted into the preheating part and the stretching part, the shaft 15 is rotated to move the guide rail 13, and the gap between it and the guide rail 12 is made steplessly variable.
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