公开(公告)号：US20160169263A1

公开(公告)日：2016-06-16

申请号：US14903553

申请日：2014-07-08

申请人： TOPURA CO., LTD.

发明人： Shigeto MORI ,  Hiroshi NAKANO ,  Yosuke OKAMURA ,  Seiya HOSHINO

IPC分类号： F16B35/04 ,  B21H3/02

CPC分类号： F16B35/048 ,  B21H3/02 ,  F16B39/30

摘要： A threaded fastener is provided in which a head bearing surface can be in full intimate contact with a counterpart. The threaded fastener is provided with a head (10), and a screw shank (20) extending from the head (10). The screw shank (20) is provided with a parallel thread portion (22) having a complete screw thread formed therein, a neck portion (24) having no screw thread, a transition thread portion (26) having an incomplete screw thread formed to extend from the parallel thread portion (22) toward the neck portion (24) with its root diameter being the same as that of the complete screw thread and with its thread height gradually becoming lower to reach the neck portion, and an underneck rounded portion (28) formed in a corner angle portion between the neck portion (24) and a head bearing surface (11), wherein the neck portion (24) is work hardened with its diameter being narrowed from a root diameter of the parallel thread portion (22).

摘要翻译： 提供了一种螺纹紧固件，其中头部支承表面可与对应物完全紧密接触。 螺纹紧固件设置有头部（10）和从头部（10）延伸的螺钉柄（20）。 螺杆（20）具有形成有完整螺纹的平行螺纹部分（22），不具有螺纹的颈部（24），具有不完整螺纹的过渡螺纹部分（26）形成为延伸 从平行螺纹部分（22）朝向颈部部分（24），其根直径与完整螺纹的根直径相同，并且其螺纹高度逐渐变低以到达颈部部分，以及底部圆形部分（28 ）形成在颈部（24）和头部支承表面（11）之间的角角部分中，其中颈部（24）的工作硬化，其直径从平行螺纹部分（22）的根部直径变窄， 。