Method of and apparatus for incorporating torsion spring

Details Method of and apparatus for incorporating torsion spring Method of and apparatus for incorporating torsion spring

1997-12-30

1999-07-27

Echols, P. W.

Metal working

Method of mechanical manufacture

Assembling or joining

29225, 29227, 29452, 29450, 29806, 298969, 140 89, 267135, 267155, B23P 1102

Patent

active

059269359

ABSTRACT:
A torsion spring having a central coiled portion and a pair of resilient arms projecting from the coiled portion in different directions is incorporated in a workpiece so that the coiled portion is fitted on a support pin on the workpiece and the arms are engaged with first and second engagement portions on the workpiece. A center pin is inserted into the coiled portion of the torsion spring, and the coiled portion is held by attraction of an attracting portion provided around the center pin. A pair of forming pins are moved relative to the center pin in directions perpendicular to the longitudinal axis of the center pin to abut against the respective arms of the torsion spring and deflect them. Then, the torsion spring held by the attracting portion is moved to bring the end of the center pin into abutment against the top end of the support pin, and the attracting portion is moved toward the support pin so that the center pin is pushed away from the coiled portion and the support pin is inserted into the coiled portion, and the arms of the torsion spring are released from the forming pins and brought into engagement with the first and second engagement portions on the workpiece.

REFERENCES:
patent: 4959897 (1990-10-01), Ogawa et al.

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