Title:
SECURITY BOLT
Document Type and Number:
Japanese Patent JP2023047187
Kind Code:
A
Abstract:
To provide a practical security bolt which is less likely to be removed illicitly because an engagement structure between a head and a tool is not recognized from the outside and can be removed easily when necessary.SOLUTION: A security bolt 1 comprises: a bolt body 2 formed by connecting a head 9, having a diameter larger than that of a screw shaft 4 and provided with an engaged part 6 capable of engaging with a tool, with a base end of the columnar screw shaft 4 in which a screw groove is engraved on an outer periphery; and a cap 3 for covering the head 9 of the bolt body 2 which is formed by a deformable metal thin plate. Further, the cap 3 is formed into a semi-spherical shape and a recessed part 7 functioning as a dummy engagement recessed part having a non-columnar shape is formed at a top part of the cap 3.SELECTED DRAWING: Figure 1
Inventors:
SHIBUYA KAZUOKI
Application Number:
JP2021156140A
Publication Date:
April 05, 2023
Filing Date:
September 24, 2021
Export Citation:
Assignee:
AOYAMA SEISAKUSHO
International Classes:
F16B41/00; F16B37/14
Attorney, Agent or Firm:
Keiya Inoue
Hisao Hase
Yoshiyuki Mizuno
Hisao Hase
Yoshiyuki Mizuno