Title:
SCREW DROP-OFF PREVENTION MECHANISM
Document Type and Number:
Japanese Patent JP2019190578
Kind Code:
A
Abstract:
To prevent a screw from dropping off from a member to be fastened even when removing the screw while the fastening member is subject to load in a fitting direction.SOLUTION: A screw 3 includes: a tap part 7 provided to a tip of the screw 3; and a constricted part 6 provided to a bottom of the screw 3 and having an outer diameter that is smaller than an outer diameter of the tap part 7. A cover 2 that is a member to be fastened has a screw insert hole 5 having a snowman shape constituted by combining two circular arcs with different diameters.SELECTED DRAWING: Figure 2B
Inventors:
NAKADA EIJI
IGARASHI ARATA
IGARASHI ARATA
Application Number:
JP2018084246A
Publication Date:
October 31, 2019
Filing Date:
April 25, 2018
Export Citation:
Assignee:
MITSUBISHI ELECTRIC ENG
International Classes:
F16B41/00
Domestic Patent References:
| JP2016032366A | 2016-03-07 | |||
| JP2002349537A | 2002-12-04 | |||
| JP2017177906A | 2017-10-05 |
Attorney, Agent or Firm:
Michiharu Soga
Kajinami order
Shunichi Ueda
Junichiro Yoshida
Takahiro Matsuoka
Bessho Kobo
Akihiro Sato
Kajinami order
Shunichi Ueda
Junichiro Yoshida
Takahiro Matsuoka
Bessho Kobo
Akihiro Sato