Title:
LOCKING STRUCTURE OF BOLT-NUT AND BALLOON TYPE LOCKING TOOL
Document Type and Number:
Japanese Patent JP3782803
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a locking structure of a bolt-nut and a balloon type locking tool, preventing looseness even if a member engaged with the bolt is made thinner after fastening.
SOLUTION: When plate materials 11, 12 to which the locking structure 10 of a bolt-nut is applied are made of wood, thinning of the plate materials 11, 12 due to drying causes looseness of fastening of the plate materials 11, 12 using a hexagonal bolt 13 and a long nut 14. According to the looseness, the balloon type locking tool 15 interposed between the head 13a of the hexagonal bolt 13 and the upper plate material 11 is elongated by pressure of N2 gas previously enclosed in an internal space (a). As a result, the looseness of the long nut 14 can be prevented.
Inventors:
Masayuki Uryu
Application Number:
JP2003363471A
Publication Date:
June 07, 2006
Filing Date:
October 23, 2003
Export Citation:
Assignee:
JM Engineering Co., Ltd.
International Classes:
F16B5/02; F16B39/24; F16B31/04; F16B39/34; F16B43/00; (IPC1-7): F16B39/24; F16B5/02; F16B39/34; F16B43/00
Domestic Patent References:
| JP5141408A | ||||
| JP10184756A | ||||
| JP64074310A | ||||
| JP2002307924A | ||||
| JP2002070941A | ||||
| JP2069112U | ||||
| JP26000419Y1 | ||||
| JP48021054U | ||||
| JP11303915A |
Attorney, Agent or Firm:
Ichiro Abe
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