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Title:
FALL GUARD STRUCTURE OF FASTENING NUT IN PORTABLE POWER MACHINE AND FITTING METHOD OF FASTENING NUT
Document Type and Number:
Japanese Patent JP2017109405
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide: a fall guard structure of a fastening nut in a portable power work machine, the structure having a low cost of manufacture or components, facilitating fitting work of a nut mooring member to a cover or maintenance, and being excellent in durability, and capable of realizing small-sized weight saving; and a fastening method of the nut.SOLUTION: A notched cylindrical nut locking member 50, having a plurality of elastically deformable leg-like pieces 55, interpolated from the rear face 20b side of a cover 20a into a bolt insertion hole 28b to block movement to the front face 20a side, is arranged, and the seating face 40c in a nut 40 is coaxially provided by projection with a mooring cylindrical part 45 of predetermined length as a nut mooring member interpolated into the bolt insertion hole 28b and hardly elastically deformable relatively to the nut locking member 50 to continuously provide a hook part 46 bent inward over the whole periphery at the projection end of the mooring cylindrical part 45, and to continuously provide a locking claw part 56 bent outward for locking the hook part 46 at the tip of a leg-like piece 55 of the nut locking member 50.SELECTED DRAWING: Figure 1

Inventors:
KAWAMURA KUNIMUNE
UMETANI KAZUHIRO
Application Number:
JP2015246206A
Publication Date:
June 22, 2017
Filing Date:
December 17, 2015
Export Citation:
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Assignee:
YAMABIKO CORP
International Classes:
B27B17/00; B23D57/02; B25F5/02; F16B41/00
Attorney, Agent or Firm:
Yusuke Hiraki
Sekiya Mitsuo
Ishikawa Takiharu
Naoki Takemura