| 摘要 |
<p>[Problem] To provide a blind rivet that can keep the broken mandrel portion from dropping off the rivet body and that can maintain high fastening strength for the blind rivet. [Solution] A head 7 is formed so that the maximum diameter portion 18 as viewed from the front is arranged in a different position axially with respect to the maximum diameter portion 19 as viewed from the side. The horizontal cross-section of the head 7 is such that a first ellipse is formed in the maximum diameter portion 18, and a second ellipse is formed in the maximum diameter portion 19 with the long axis perpendicular to the long axis of the first ellipse. The horizontal cross-sectional shape of the head 7 is gradually changed in the axial direction so as to continue from the first ellipse to the second ellipse. Each one of the horizontal cross-sections has the same circumferential length at different axial positions on the head.</p> |
