Title:
BOLT COVER
Document Type and Number:
Japanese Patent JP2012237371
Kind Code:
A
Abstract:
To accurately measure a bolt axial force, and to easily perform the measurement work.
This bolt cover comprises: a cover body (2) which wholly covers the head of a bolt; an insertion hole (4) which is formed at a position facing the end face of the head of the bolt of the cover body, and inserted with an ultrasonic probe for measuring the bolt axial force by utilizing an ultrasonic wave; a cap (10) detachably attached to the insertion hole; and an oil holding body (15) which is arranged between the cap and the end face of the head of the bolt, and immersed with an oil liquid. A guide means (6) for guiding the insertion of the ultrasonic probe is arranged at the insertion hole.
Inventors:
OSANAWA TAKASHI
TAKADA RYUJI
SHIMODAIRA TAKAYUKI
TAKADA RYUJI
SHIMODAIRA TAKAYUKI
Application Number:
JP2011106501A
Publication Date:
December 06, 2012
Filing Date:
May 11, 2011
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
F16B37/14; F16B31/02; F16B35/00; F16B41/00
Attorney, Agent or Firm:
Patent Business Corporation Takewa International Patent Office