| 摘要 |
PROBLEM TO BE SOLVED: To suppress abrasion and friction.SOLUTION: A rocker arm 6 includes: a roller 7 having a supporting shaft insertion hole 7A; a roller accommodating portion 11 having a pair of side walls 12 disposed to hold the roller 7, and accommodating the roller 7; a roller supporting shaft 13 disposed over the pair of side walls 12 and rotatably journaling the roller 7 by being inserted into the supporting shaft insertion hole 7A of the roller 7; and two contact portions 17 formed on at least two positions separated in a circumferential direction of the roller 7 and the roller supporting shaft 13 at least at one of opposed peripheral faces of the supporting shaft insertion hole 7A of the roller 7 and the roller supporting shaft 13, and kept into contact with a mating side in a state of having a non-contact space 18 where the opposed peripheral faces are not kept into contact with each other. |
