Title:
INTERNAL CIRCUMFERENCE MEASUREMENT DEVICE FOR CIRCULAR MEMBER
Document Type and Number:
WIPO Patent Application WO/2017/159194
Kind Code:
A1
Abstract:
Provided is an internal circumference measurement device for a circular member, whereby the length of an internal circumference can be precisely measured without applying unnecessary load to the circular member. After the inner circumferential surface 12a of the circular member 12 is caused to engage with two protruding sections 7 that protrude from the surface of a platform 4 in a standing state and the circular member 12 is transferred to the platform 4: the platform 4 is laid down in a horizontal state and the circular member 12 is laid flat on the platform 4, in a non-restrained state; a two-dimensional sensor 8 is arranged at a prescribed measurement position and facing the inner circumferential surface 12a of the circular member 12; this two-dimensional sensor 8 is rotated around a rotation axis 9 at a prescribed position on the inside of the circular member 12; a distance d of separation from the two-dimensional sensor 8 to the inner circumferential surface 12a is measured for the range of the entire circumference of the circular member 12; and the inner circumferential length L of the circular member 12 is calculated by a calculation unit 11 on the basis of the measured distance d of separation and a distance w between the rotation axis 9 in the planar view and the two-dimensional sensor 8.
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Inventors:
MATSUMURA KENSUKE (JP)
SUGIYAMA YUICHI (JP)
SUGIYAMA YUICHI (JP)
Application Number:
PCT/JP2017/005616
Publication Date:
September 21, 2017
Filing Date:
February 16, 2017
Export Citation:
Assignee:
YOKOHAMA RUBBER CO LTD (JP)
International Classes:
G01B11/02; G01B21/02
Foreign References:
| JPH01195309A | 1989-08-07 | |||
| JPH037482U | 1991-01-24 | |||
| US6289600B1 | 2001-09-18 | |||
| JP2012150013A | 2012-08-09 | |||
| JPH061128A | 1994-01-11 |
Other References:
See also references of EP 3431923A4
Attorney, Agent or Firm:
SEIRYU PATENT PROFESSIONAL CORPORATION et al. (JP)
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