| 摘要 |
A tooth groove (24b) is provided at the boundary section between a tooth body part (61) and a projecting part (62), and a right angle or an acute angle is formed between the tooth body part side surface (23f), which is the circumferential-direction side surface of the tooth body part (61), and a tooth body-part-abutting stop section (24c), which is the surface of the tooth groove (24b) that continues from the tooth body part side surface (23f). The projecting part (62) is turned to the outer side in the circumferential direction; a projecting-part-abutting stop section (24f), which is the outer-circumferential-side side surface of the projecting part (62), is caused to adhere to the tooth-body-part-abutting stop section (24c); and a shoe (26) is formed on a tooth (23b). |
