| 摘要 |
<p>A needle member 3 has a branch portion 10 at its central position in the longitudinal direction. Further, the needle member 3 has a first fork 12, a second fork 14, and a third fork 16. The first fork 12 protrudes toward a hook 8 from the branch portion 10, and the second fork 14 protrudes backward from the branch portion 10. The third fork 16 faces the second fork 14. Tongues 32 are provided at the front end of a slider 30. A first fork contact cam surface 39 is provided in a front solid portion 80 of the slider 30 such that vertical movement of the slider 30 is limited by the first fork 12. Further, second and third fork contact surfaces 44, 46 are provided on the front side and the back side of a back solid portion 40 such that vertical movement of the slider 30 is limited by the second and third forks 14, 16.</p> |
