| 摘要 |
Straight-linearly extending guide rods (25, 26) are fixed along an ejection opening (17) to a contact member (24), the contact member (24) is slidably held at a nose (16) with the guide rods (25, 26) in between, a nose extensio n portion (23) is formed at the head of an ejection opening (17) integrally wi th the nose (16) so as to cover the outer periphery of the ejection opening (17 ), the contact member (24) is received in an annular space formed between the nose extension portion (23) and the ejection opening (17), and the contact member (24) is disposed so as to project from the head of the nose extension portion (23).
|
