Claims
- 1. Apparatus for manufacturing solid tension coil springs having attachment loops at both ends thereof, said apparatus comprising:
- (a) first means for bending a wire into a solid tension coil spring body;
- (b) second selectively operable means for feeding a wire to said first means;
- (c) third means for sensing when a solid tension coil spring body formed by said first means has reached a predetermined length and for stopping the feeding of the wire to said first means when the solid tension coil spring body has reached that length;
- (d) a shaft;
- (e) fourth means for intermittently rotating said shaft through 1/n revolutions (n being a positive integer) when said third means senses that the solid tension coil spring body has reached its predetermined length, whereby said shaft is rotated to n positions during each complete revolution of said shaft;
- (f) fifth means mounted on said shaft for releasably grasping a solid tension coil spring body when said shaft is in the first of the n positions;
- (g) sixth means for severing the wire at the upstream end of the solid tension coil spring body, whereby the apparatus initially forms intermediate products comprising a solid tension coil spring body which does not have an attachment loop at either end thereof;
- (h) two wedge tools sized and shaped to slide between adjacent coils of the solid tension coil spring body and to force the adjacent coils apart;
- (i) seventh means for simultaneously forcing one of said wedge tools between the last and the next-to-last coil at each end of each solid tension coil spring body while said shaft is in another of the n positions;
- (j) eighth means for simultaneously forming the last coil at each end of each solid tension coil spring body into an attachment loop while said shaft is in said another of the n positions after said seventh means has forced the last coil at each end away from the adjacent coil;
- (k) ninth means for selectively varying the relative spacing and angular orientation of said seventh and eighth means so that the apparatus can be used to form attachment loops at both ends of solid tension coils spring bodies having different facing angles between the attachment loops and so that the apparatus can be used to form attachment loops at both ends of solid tension coil spring bodies having different numbers of turns and/or different diameters; and
- (1) tenth means for releasing a formed solid tension coil spring having attachment loops at both ends thereof from the grasp of said fifth means after said eighth means has formed the attachment loops.
Priority Claims (1)
Number |
Date |
Country |
Kind |
57-75603 |
May 1982 |
JPX |
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Parent Case Info
This application is a continuation, of application Ser. No. 491,804, filed May 5, 1983, abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
2053612 |
May 1972 |
DEX |
Continuations (1)
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Number |
Date |
Country |
Parent |
491804 |
May 1983 |
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