Title:
FASTENING DEVICE
Document Type and Number:
Japanese Patent JP2019111605
Kind Code:
A
Abstract:
To provide a fastening device capable of reducing torque loss.SOLUTION: The fastening device comprises: a drive source for generating torque; a spindle that rotates according to the torque so as to fasten a fastening member set at the side of a tip; a biasing member for biasing the spindle toward the fastening member; and a bushing that has an insertion hole for insertion of the spindle, and which guides the spindle in a direction along a rotational axis. The spindle includes: a large diameter portion at the side of the tip; and a small diameter portion that has a diameter smaller than a diameter of the large diameter portion, and which is disposed opposite to the tip. The small diameter portion is provided so that the more the fastening member is fastened, the further the small diameter portion enters the insertion hole. The large diameter portion is provided so that the more the fastening member is fastened, the further the large diameter portion exits from the insertion hole.SELECTED DRAWING: Figure 3
Inventors:
KOMATSU KIYOSHI
Application Number:
JP2017246004A
Publication Date:
July 11, 2019
Filing Date:
December 22, 2017
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
B25B21/00; B23P19/06
Attorney, Agent or Firm:
Shuhei Katayama