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Patent Searching and Data


Title:
BOLT COME-OFF PREVENTION STRUCTURE
Document Type and Number:
Japanese Patent JP2011075076
Kind Code:
A
Abstract:

To provide a bolt come-off prevention structure surely preventing the bolt from coming off over a long period of time.

The come-off prevention structure for the bolt 37 that fastens a rotating object guard 20 to an engine room frame 12 includes a washer 43 unseparably mounted onto a non-screw shaft portion 42b between a head 41 and a screw shaft portion 42a of the bolt 37; and a cover member 45 for covering the washer 43. When the bolt 37 is not fastened, the washer 43 is butted against the cover member 45, thereby preventing the bolt 37 from coming off the rotating object guard 20. A stroke length S of the washer 43 on the non-screw shaft portion 42b is preferably not less than a length L screwed into the engine room frame 12 of the bolt 37.


Inventors:
NAGAOKA ISAO
Application Number:
JP2009229401A
Publication Date:
April 14, 2011
Filing Date:
October 01, 2009
Export Citation:
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Assignee:
KOMATSU MFG CO LTD
International Classes:
F16B41/00; F16B35/00; F16B37/14
Domestic Patent References:
JPH0553137U1993-07-13
JPH07310725A1995-11-28
JP2008133900A2008-06-12
JPH05874U1993-01-08
JPH0238514U1990-03-14
Attorney, Agent or Firm:
Tsutomu Inoue