The subject-matter of the invention is a device for aligning springs during transport of the springs from a spring winding machine to a spring interior assembly automatic machine.
With the known automatic manufacture of spring interior mattresses, springs manufactured on a spring winding machine are taken off by a transport star with several arms, if desired knotted at the ends and additionally subjected to a heat treatment. At the ends of the arms there are arranged gripper hands which remove the springs from the spring winding machine and hold these rigidly during transport. The springs are transferred from the transport star to a transport belt pair and are introduced by this transport belt pair into a spring interior assembly automatic machine. In the spring interior assembly automatic machine the springs are finally connected to one another with spiral wires to be joined together into a spring interior of a predeterminable size. The springs manufactured on the spring winding machine, without additional measures adjusting the springs, reach the transport belt and thus the spring interior assembly automatic machine aligned more or less equally, i.e. the ends of the wires in the region of the end rings lie in each case more or less at the same location. Furthermore, this means that, for example, the last springs of a row are aligned outwardly and thus penetrate through the mattress material. In order to prevent this, usually the last spring is rotated by 180 about its own axis so that the free ends or the two knots of the ends or knots of the last springs are aligned towards the second to last spring. It is, however, often desirable to arrange the springs in pairs with the knots or spring wire ends lying opposite one another. There are already known various devices for this purpose, i.e. the alternate alignment of the knots. From DE-A1 19542847 with a spring led from the rotary star from a spring winding device, it is known within the transport belt to rotate this spring about its own axis with a suitably designed displacer, until the knots have reached the desired angular position. The displacement is effected by a displacing device which is designed in a manner such that one may only roughly achieve the alignment of the knot which is set once. Another desired alignment may only be effected by exchange of the displacer of the displacing device.
The object of the present invention then lies in providing a device for aligning springs or their end knots or generally the end regions to a predeterminable angular position which may be changed at any time.
This object is achieved by a device with the features of the patent claim 1. Advantageous formations are defined in the dependent claims.
The freely selectable rotational angle end position of the rotary plate during its rotational movement from a take-over location to a transfer location permits the knots and/or ends of the spring wire to be brought into a desired position on the transport belt. Any end positions as a result are possible from spring to spring. With the use of several rotary plates on a rotary disk or likewise which accommodate the rotary plates, the cadence of the aligned springs is considerably increased. Furthermore, by way of the application of several rotary plates their rotational speed on alignment is reduced and thus a sliding of the springs tensioned between the rotary plate pairs on the surfaces of the rotary plates is prevented. In a preferred formation of the invention, when using several rotary plates the later are driven synchronously and without slip by a single toothed belt or chain overdrive. The drive of the toothed belt is effected from the rotational center of the rotary disk. The latter is preferably likewise driven by a servo drive and in steps is led from the take-over position to the transfer position. The introduction of the springs from the transport star or out of their gripper hands into the rotary plate pair and out of the latter is effected in a conventional manner by the linearly driven displacers or by grippers on a pivot axis.
The invention is described in more detail by way of illustrated embodiment examples.
In
In
The rotary plates 17 rotatably mounted in the tight-tolerance, circular recesses 29 in the two rotary disks 19 are in each case partly embraced by a double-sided toothed belt 31. Furthermore, each of the two toothed belts 31 embraces a drive belt wheel 33 which is seated on the drive axle B of the rotary disk 19 and which may be driven by a servo-motor MA. The rotary disk 19 is likewise drivable by a servo-motor MB, and specifically independently of the drive of the rotary plates 17 (
In the following, the manner of functioning of the device is explained in more detail. With the rotary star 1, individual springs 7 from below (arrow P) held by the gripper hand 5 are introduced between the tensioning and introduction plates 25 and at the same time are pressed axially together. The spring 7 with the displacer 21 or its advance fingers 23 is taken out of the gripper hand 5 (not shown in
For an improved overview the knots or wire ends of the end rings have not been shown in the figures, but flat locations of differing widths and their rotational position with respect to the horizontal in the figures.
Number | Date | Country | Kind |
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2002 1315/02 | Jul 2002 | CH | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/CH03/00428 | 6/30/2003 | WO | 00 | 1/25/2005 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2004/011173 | 2/5/2004 | WO | A |
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2623732 | Dec 1976 | DE |
3730236 | Mar 1989 | DE |
19542847 | May 1997 | DE |
19950401 | Jun 2000 | DE |
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1391201 | Apr 1975 | GB |
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Number | Date | Country | |
---|---|---|---|
20050241720 A1 | Nov 2005 | US |