Title:
脱落防止具
Document Type and Number:
Japanese Patent JP6723539
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a dropout prevention tool capable of stably exhibiting a looseness prevention performance.SOLUTION: A dropout prevention tool 1 comprises: a coil spring body 2; and a hexagon body 3. The coil spring body 2 includes: a first coil spring part 2A; an end region 21; and a second coil spring part 2B. On the body 3, open holes penetrating between one edge face and the other edge face opposite each other are formed. The hexagon body 3 includes projections 5 protruding from six sides of the body 3 toward the open holes. On one edge face of the body 3, a dent part 5A extending toward the inside surface of the body 3 is formed; and the projections 5 are connected to the dent part 5A. An aperture 6 penetrating between a part of inside surface and the outside surface of the body 3 is formed. The end region 21 is inserted into the aperture 6.SELECTED DRAWING: Figure 1
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Inventors:
Yoshifumi Nagata
Kazuya Gama
Keisuke Hashizume
Haruo Sasaki
Maki Yamatoya
Shinichiro Hirata
Yasuyuki Fujisawa
Kazuya Gama
Keisuke Hashizume
Haruo Sasaki
Maki Yamatoya
Shinichiro Hirata
Yasuyuki Fujisawa
Application Number:
JP2016078842A
Publication Date:
July 15, 2020
Filing Date:
April 11, 2016
Export Citation:
Assignee:
Shuto Expressway Co., Ltd.
Taisei Corporation
Tokyo Koki Engineering Co., Ltd.
Taisei Corporation
Tokyo Koki Engineering Co., Ltd.
International Classes:
F16B39/20; F16B39/38
Domestic Patent References:
| JP2015224771A | ||||
| JP5064523U | ||||
| JP2016061385A |
Attorney, Agent or Firm:
Shuichiro Ariyoshi
Morita Yasuyuki
Tsutsui Nobuyoshi
Satoko Endo
Keita Kajiwara
Morita Yasuyuki
Tsutsui Nobuyoshi
Satoko Endo
Keita Kajiwara