Apparatus for fastening the end coils of border springs of a spring construction to an elongate wire |
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| 申请号 | US3698448D | 申请日 | 1971-05-24 | 公开(公告)号 | US3698448A | 公开(公告)日 | 1972-10-17 |
| 申请人 | SPUEHL AG; | 发明人 | SPUHL WALTER; | ||||
| 摘要 | The end coils of border springs of a spring construction are clamped by clamping jaws against a common elongate wire with the end coils overhanging the wire. A bending head attached to a pivotal and reciprocable arm undergoes a sequence of movements to produce bending of the overhanging ends of the coils around the wire. | ||||||
| 权利要求 | 1. Apparatus for fastening an elongate wire to the end coils of border springs of a spring construction, said apparatus comprising means for clamping a border spring against a wire in a position in which the border spring has an end coil with a free edge overhanging said wire, bending means for bending the free edge of said end coil of the border spring around said wire, said bending means including a bending head with a bending cam having a plurality of cam surfaces, and means for displacing said bending head relative to said border spring in a plane perpendicular to said wire to produce successive contact of said cam surfaces with said free edge of the end coil of the border spring to bend said free edge around said wire. 2. Apparatus as claimed in claim 1 wherein said means for displacing said bending head comprises a swivel arm having opposite ends, said bending head being secured to one of said ends of the swivel arm, and a reciprocable member pivotably connected to the other end of said swivel arm such that said swivel arm can be linearly displaced with concurrent pivotal movement. 3. Apparatus as claimed in claim 2 comprising means connected to said swivel arm at a location displaced from the pivotal connection of the swivel arm and said reciprocable member for pivoting said swivel arm about said pivotal connection. 4. Apparatus as claimed in claim 1 wherein said bending means includes a pair of symmetrical converging guide members for engaging the overhanging edge of the end coil of the border spring to guide the same to a pre-determined position on said wire. 5. Apparatus as claimed in claim 1 wherein said bending means further comprises a pivotal lever, said clamping means including a clamping jaw carried by said lever for pressing said end coil of the border spring against said wire. 6. Apparatus as claimed in claim 5 wherein said lever comprises a pair of parallel legs, said clamping means including a second clamping jaw, one jaw being mounted on each leg, and a positioning member on each jaw opposed to said guide members for pressing the end coil of the border spring against said guide members before the end coil is clamped against said wire. 7. Apparatus as claimed in claim 6 comprising a main carriage supporting said pivotal lever, an auxiliary carriage secured to said main carriage, a first stop member on said auxiliary carriage positioned to limit pivotal movement of said swivel arm in one direction, and a second stop member on said auxiliary carriage positioned to limit linear displacement of said swivel arm in one direction. 8. Apparatus as claimed in claim 7 wherein said linear displacement of said swivel arm is up and down and the pivotal movement of said swivel arm is toward and away from said carriage, said swivel arm being successively displaced downwardly, then pivoted away from said carriage, then upwardly in pivoted position, and finally pivoted back towards said carriage. 9. Apparatus as claimed in claim 8 wherein said first stop member has an upper inclined sliding surface facing said swivel arm, said swiveL arm including a portion engageable with said sliding surface during the end of the upward movement of said swivel arm to cause the swivel arm to undergo said pivoted movement back towards said carriage. 10. Apparatus as claimed in claim 1 wherein said bending means includes at least one additional bending head spaced from the first head for simultaneous fastening of a plurality of border springs to said wire. 11. Apparatus as claimed in claim 10 comprising a common support on which said bending heads are releasably attached to permit adjustment of the spacing between the heads to correspond to the diameter of the border springs. |
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