携帯型動力作業機における締付用ナットの落ち止め構造及びその締付用ナットの組付方法

Japanese Patent JP6588326

B2

A structure for preventing the falling of a fastening nut of a portable power working machine that can reliably prevent loss of the nut while suppressing the production and component costs, allows for easy operation of attaching a nut anchor member to a cover, and can increase the maintenance property, suppress damage and failures, increase the durability, and reduce the size and weight; and a method for attaching the fastening nut to a cover are provided. The structure includes a nut locking member (50), which is inserted through a bolt insertion hole from a back surface side of a cover (20) so that movement of the nut locking member (50) to a front surface side is prevented, and has a split cylindrical shape with elastically deformable leg-like piece portions; an anchoring cylindrical portion (45) with a predetermined length functioning as a nut anchor member (50), the anchoring cylindrical portion (45) being provided in a protruding manner and coaxially with the nut on a seating surface side, being adapted to be inserted through the bolt insertion hole, and being relatively difficult to elastically deform with respect to the nut locking member (50). A protruding end of the anchoring cylindrical portion (45) of the nut has formed continuous therewith a hook portion (46) that bends inward along its entire periphery. Each end of the leg-like piece portion of the nut locking member (50) has formed continuous therewith a locking claw portion (46) that bends outward to lock the hook portion (46).

Kawamura Chimune
Kazuhiro Umetani

JP2015246206A

October 09, 2019

December 17, 2015

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Yamabiko Co., Ltd.

B27B17/00; B23D57/02; B25F5/02; F16B41/00

JP201513462A

US20060231285

Yusuke Hiraki
Sekiya Mitsuo
Ishikawa Takiharu
Naoki Takemura

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