Title:
TIGHTENING TORQUE CONTROL TOOL AND COMBINATION OF TIGHTENING TORQUE CONTROL TOOL AND FASTENER
Document Type and Number:
Japanese Patent JP2021053732
Kind Code:
A
Abstract:
To provide a novel tightening torque control tool that can, even when the tightening torque control tool falls with an upper end surface oriented downward and collides with a floor surface, prevent cracks from being generated by impact of the collision, from an upper end surface of the tightening torque control tool toward an upper end corner portion on downstream side viewed in a rotational direction of tightening, of a through-opening or a recessed portion formed on the outer peripheral surface of the tightening torque control tool.SOLUTION: An upper end surface 34 of a tightening torque control tool 2 is provided with a plurality of ridges 36 arranged at intervals in the circumferential direction, or a ridge extending in a circumferential direction.SELECTED DRAWING: Figure 1
Inventors:
KOBAYASHI RYUTA
HASHIMOTO KATSUMI
HASHIMOTO KATSUMI
Application Number:
JP2019178506A
Publication Date:
April 08, 2021
Filing Date:
September 30, 2019
Export Citation:
Assignee:
NIPPON CLOSURES CO LTD
International Classes:
B25B23/14; F16B31/02
Domestic Patent References:
| JP2018204624A | 2018-12-27 | |||
| JPS59113307A | 1984-06-30 |
Attorney, Agent or Firm:
Naozumi Ono
Sachiko Okunuki
Toshiyuki Kojima
Sachiko Okunuki
Toshiyuki Kojima