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发明公开
CN104416622A 拧紧用螺母的防止脱落构造及拧紧用螺母系留部件 有权

拧紧用螺母的防止脱落构造及拧紧用螺母系留部件
摘要：
本发明提供一种能够可靠地防止丢失螺母，并能抑制组装成本、制造成本及零件成本，同时不易发生破损及故障，并能提高拧紧或松开螺母的作业性、持久性的拧紧用螺母的防止脱落构造。螺母系留部件（50）由一根能够弹性变形的线材或棒材弯曲形成，其由切口环状部（52）、左右一对脚状片部（53）以及钩片部（55）构成，切口环状部（52）外嵌保持在设置于螺母（40）外周的环状槽（44），左右一对脚状片部（53）连续设置在切口环状部（52）的两端，钩片部（55）连续设置在脚状片部（53）的下部，在盖子（20）设置有与钩片部（55）卡止的卡止部（25），用于从螺栓（30）卸下螺母（40）时，使螺母（40）及螺母系留部件（50）不从盖子（20）脱落。
摘要（英）：

Provided is a structure for preventing the falling of a fastening nut, the structure reliably preventing loss of the nut and containing assembly cost, manufacturing cost, and component cost while reducing the possibility of damage, failure or the like and increasing the nut fastening and loosening workability and durability. A nut anchor member (50) comprises a single bent wire or bar of elastically deformable material, and includes: a split ring-shaped portion (52) externally retained in a circular groove (44) provided at the outer periphery of a nut (40); a pair of left and right leg-like piece portions (53) continuous with both ends of the split ring-shaped portion (52); and hook piece portions (55) continuous with lower portions of the leg-like piece portions (53). A cover (20) includes a locking portion (25) that locks the hook piece portions (55) so as to prevent the nut (40) and the nut anchor member (50) from falling from the cover (20) when the nut (40) is detached from the bolt (30).

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