Patent ID: 11897093
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A nut temporary tightening device comprising:
bearing parts each having a cylindrical sleeve extending in an up-down direction and a flange provided at an intermediate portion of the cylindrical sleeve;
a first support plate having a plurality of first support holes that each support corresponding one of the bearing parts along an outer circumference, on an upper end side, of the bearing part;
a second support plate that is fixed under the first support plate at a distance greater than a thickness of the flange such that the second support plate faces and is parallel to the first support plate, and has a plurality of second support holes that each support corresponding one of the bearing parts along the outer circumference, on a lower end side, of the bearing part; and
socket assemblies each having a driving shaft that is passed through corresponding one of the bearing parts that is supported such that the flange is loosely fitted in the up-down direction between the first support plate and the second support plate, a driving gear that is provided at a portion of the driving shaft protruding toward the upper end side, and a socket that is provided to be able to hold a nut at a leading end of the driving shaft protruding toward the lower end side, wherein
the first support holes of the first support plate are disposed in a linear arrangement,
the second support holes of the second support plate are disposed in a linear arrangement at positions corresponding to the first support holes,
the first support plate has elongated holes as the first support holes, and a long-side direction of each of the elongated holes extends along a direction in which the first support holes are disposed,
the second support plate has elongated holes corresponding to the first support holes as the second support holes, and
at least one pair of corresponding holes of the first support holes and the second support holes of the first support plate and the second support plate is reference holes, and a diameter of the reference holes is set to be smaller than a diameter of the other first support holes or a diameter of the other second support holes.