SLIP-IN PREVENTION APPARATUS

Japanese Patent JP2015221601

A

PROBLEM TO BE SOLVED: To provide a slip-in prevention apparatus allowing bolts to be attached to a frame member with a simple configuration and excellent in assembly workability.SOLUTION: A slip-in prevention apparatus 100 comprises a collar 50 which is attached to a shank part 32 of a bolt 30 to fix the bolt 30 to the frame member 10 by sandwiching a rear wall 11 of a frame member 10 between a head 31 of the bolt 30 and the collar. The collar 50 includes: a cylindrical part 51 having a bore diameter allowing the shank part 32 of the bolt 30 to be inserted and also having an outside diameter allowing entry into an attachment hole 16; and a flange part 52 formed in the cylindrical part 51 on the tip side of the shank part 32, and having an outside diameter larger than the attachment hole 16. The cylindrical part 51 has a projection part 53 protruding inward in a radial direction to be engaged with a thread root of an external thread in the shank part 32 of the bolt 30, on an inner peripheral surface. The area between a base end side and a tip side of the projection part 53 protrudes toward the flange part 52.

TASAKA NAOKI

JP2014106270A

December 10, 2015

May 22, 2014

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MITSUBISHI ALUMINIUM

B60R19/56; F16B41/00

JP2009248785A	2009-10-29
JP2003074530A	2003-03-12
JP2010223363A	2010-10-07
JP2001263314A	2001-09-26
JP2006002887A	2006-01-05
JP2011127741A	2011-06-30
JPS6040816U	1985-03-22
JP2011043233A	2011-03-03

US20040163218A1	2004-08-26
US5409323A	1995-04-25

Masakazu Aoyama

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