Title:
BOLT PREVENTED FROM BEING LEFT UNFASTENED
Document Type and Number:
Japanese Patent JP2003232320
Kind Code:
A
Abstract:
To enable control of fastening torque and prevention from being left unfastened with a single bolt by making use of regular fastening tool such as a wrench.
A bolt prevented from being left unfastened comprises a cap 1 and a bolt 2. A head 3 of the cap 1 has a hexagonal shape used for fastening, and a lower portion of the cap 1 wraps a head 4 of the bolt with a hexagonal shape or the like. The bolt is an integrated type bolt in which the cap 1 is firmly fastened onto the bolt 2 by means of press-fitting and insert-molding or the like. The bolt has a structure in which the cap 1 is dropped out when exceeding predetermined torque, and this structure can simultaneously contribute to prevention from being left unfastened.
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Inventors:
EMOTO MASAFUMI
Application Number:
JP2002067650A
Publication Date:
August 22, 2003
Filing Date:
February 06, 2002
Export Citation:
Assignee:
EMOTO MASAFUMI
International Classes:
F16B31/02; (IPC1-7): F16B31/02
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