Metal deforming – By deflecting successively-presented portions of work during... – To form helical coil or tube
Patent
1998-10-30
2000-02-15
Hail, III, Joseph J.
Metal deforming
By deflecting successively-presented portions of work during...
To form helical coil or tube
72145, B21F 310, B21F 304
Patent
active
060239557
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a device for manufacturing elastic springs, especially for spring interior mattresses, which springs are constructed from a row of continuous, spiral shaped parts arranged after each other. The device comprises a feeding tool for feeding a spring wire, a bending tool for bending the wire fed by the feeding tool, the bending tool being rotatably adjustable in a plane essentially perpendicular to the feeding direction of the wire, and a spring shaping tool comprising two parallel plates between which the wire is feedable, for producing the spiral shaped parts, which spring shaping tool is rotatably adjustable for adjustment of a slope angle of the spring parts.
BACKGROUND OF THE INVENTION
A previously known device for manufacturing of such elastic springs comprises a machine where the different constituent parts such as the bending tool and the spring shaping tool are controlled through a complicated system of cams and lifters. Such a device has a complex construction and because of all the constituent parts is not completely reliable in function.
SUMMARY OF THE INVENTION
The object with the present invention is to provide a device of the type mentioned in the introduction, which through a simplification of the constituent units can make it possible in a simpler way to adjust different parameters in order to obtain elastic spring coils with predetermined desired variable dimensions.
The object is achieved according to the invention through a device which has at least one gear transmission arranged for setting the spring shaping tool in predetermined rotational positions, and adjustment tools arranged for adjustment of the angular position of the bending tool, and for the performance of predetermined bending operations.
The preferred embodiments of the invention have the characteristics which are evident from the dependent claims.
Through such a device it is possible to easily, either manually or through pre-programming, change the completed elastic spring's dimensions concerning both size and integral spring forces. This should be able to be carried out in order to manufacture mattresses with individual integral characteristics. Every person can therefore with such a device according to the invention very easily obtain a tailor made mattress which takes account of, amongst others, height and body shape.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be described more closely in the following with reference to the accompanying drawings which show a preferred embodiment.
FIGS. 1A, B and C show a finished bent and manufactured elastic spring for a spring interior mattress, where FIG. 1C shows the finished spring from the side, where FIG. 1A shows a cross-section through the spring in FIG. 1C along line a--a, and where FIG. 1B shows a cross-section of the elastic spring in FIG. 1C along line b--b.
FIG. 2 shows a partially sectioned lateral view of a device according to the invention.
FIG. 3 shows a cross-section along line III--III in FIG. 2, where the spring shaping tool is in a first position.
FIG. 4 shows a view similar to FIG. 3, where the spring shaping tool is in a second position.
FIG. 5 shows a cross-section along line V--V in FIG. 2, where the spring shaping tool is in a position corresponding to that in FIG. 4.
FIG. 6 shows a view similar to FIG. 5, where the spring shaping tool is in a position corresponding to that in FIG. 3.
DETAILED DESCRIPTION OF THE INVENTION
FIGS. 1A-C show a finished spring, more closely defined a part of an elastic spring 1, which is included as one of several similar rows of springs in a bed mattress. The elastic springs 1 have a straight part 2, a first spiral shaped part 3, a further straight part 4, a second spiral shaped part 5 and further a straight part 2' corresponding to the straight part 2. FIG. 1B shows how the spring wire 6 is itself bent between the spiral shaped parts in order to provide a row of continuous, spiral shaped parts arranged after each other. The wire first follows the straight
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patent: 5363681 (1994-11-01), Speck et al.
patent: 5444905 (1995-08-01), St. Clair
Butler Rodney
Hail III Joseph J.
Lema Industrial Ltd.
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