Method and apparatus for separating helical springs closed by knots at their winding ends
US4269300A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 24, 1979 |
| Grant date | May 26, 1981 |
| Priority date | — |
| Expiry date | Jul 24, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S198/953
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for separating helical springs with knots at their coil ends, for mattress spring frames, in which the springs are moved upright and entangled in sliding guides by a conveyor belt against a stop. The lower coil end of the springs touching the stop is grasped by a gripping member. The stop is moved to an inactive position and the gripping member pulls the grasped coil end from the sliding guide by an amount equivalent to spring wire thickness. Then the stop returns to its active position and the gripping member pivots the spring by 90.degree. into a lying position where the far end of the coil is grasped by a spring turning member. The gripping member releases the spring and returns to the starting position. Then the spring turning member rotates the spring until the knot touches a stop. After release, the spring is grasped by another gripping member and passed on to the spring frame assembly machine. The gripping member has a hook beam shiftable on a holder by an actuating member which are jointly pivotal by about 90.degree.. The stop strip is fastened to a rocking lever and can be pivoted with the latter to an inactive position. Two rollers engage the outsid…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.