公开(公告)号：US08985926B2

公开(公告)日：2015-03-24

申请号：US14118553

申请日：2011-05-20

申请人： Sinnichi Hamano ,  Naoki Nishimura ,  Kinya Kowada ,  Kazuhiro Ueba

发明人： Sinnichi Hamano ,  Naoki Nishimura ,  Kinya Kowada ,  Kazuhiro Ueba

IPC分类号： F16B35/04 ,  F16B25/00

CPC分类号： F16B25/00 ,  F16B25/0047 ,  F16B25/0052

摘要： Disclosed herein is a tapping screw (1) exerting an excellent anti-loosening effect with regard to a workpiece made of a soft material such as resin and an aluminum alloy. The tapping screw (1) includes a shaft part (3), and a normal thread (10) which is formed on the outer circumferential surface of the shaft part. A clearance groove (20) is formed by cutting out a portion of a ridge of the normal thread, and an engaging protrusion (30) is provided on a bottom of the clearance groove along a portion or an entirety of an edge of the bottom that continuously extends from a flank surface of the normal thread. The tapping screw (1) exerts an excellent anti-loosening effect even when a workpiece expands, contracts or oscillates because the engaging protrusions (30) are embedded into portions of the workpiece which have been embedded into the clearance grooves (20).

摘要翻译： 本发明公开了一种对由诸如树脂和铝合金的软质材料制成的工件施加优异的抗松动作用的自攻螺钉（1）。 自攻螺钉（1）包括轴部（3）和形成在轴部的外周面上的法线（10）。 通过切除普通螺纹的一部分脊部形成间隙槽（20），并且沿着底部边缘的一部分或全部的间隙槽的底部设置接合突起（30） 从正常螺纹的侧面连续延伸。 即使当工件膨胀，收缩或摆动时，自攻螺钉（1）也会发挥优异的防松动作用，因为接合突起（30）嵌入到已经嵌入间隙槽（20）中的工件的部分中。