| 摘要 |
PROBLEM TO BE SOLVED: To prevent the rigidity of a rocker arm body from dropping by omitting the supporting walls opposing in both sides of a pivot holder to avoid difficulty in the molding of the pivot holder due to the lack of space to apply its die when molding the pivot holder. SOLUTION: This system can enlarge a section module by forming the three consecutive walls with a pivot holder 14 in the wave-like section having a stepped surface 16 and have no defect in the die applying place when molding the pivot holder 14 by constructing it to omit the roller supporting walls 4, 5 in the both sides and can achieve the saving of space and weight reduction of the rocker arm body 2, and also can prevent the rigidity of the rocker arm body 2 dropping due to the omission of the roller supporting walls 4, 5 on both sides.
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