Electromagnetic shedding device for a textile machine

Textiles: weaving – Warp manipulation – Shedding

Patent

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Details

139 59, 139 65, D03C 320, D03C 306

Patent

active

053738713

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The present invention relates to a novel shedding device.
A device of this kind is known from the EP-A 348 338. In a device of this type a hooking device is formed at the so-called hooking-in element which can engage and disengage a counterhook which is formed at the lifting blade. The hooking-in element is brought into the hook-in position by means of the slickenside draw. This requires a high restoring force of the slickenside for requisite high speed operation. The pivoting of the hooking-in element is counteracted by the friction caused by the restoring force of the slickenside between a supporting ledge and a supporting heel. Furthermore, the pulling force acting from the slickenside on the hooking-in element is smallest when the hooking-in element is located in the lower shed position. Therefore, the restoring force of the slickenside must be considerably high.


SUMMARY OF THE INVENTION

An object of the invention is to provide a shedding device in which the pulling elements are guided by the lifting blades during the upward movement and downward movement and are designed of extreme low mass.
The advantages gained by the invention can be seen substantially in that are low, is prevented and accordingly, is achieved and and tackles, cords and slickensides is gained.
The invention will be explained with reference to the appended drawings.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a spatial view of a first embodiment of an inventive magnetic retention device,
FIG. 2 is a section along the line II--II in FIG. 1,
FIG. 3 is a spatial view of a second embodiment of an inventive retention device, and
FIG. 4 is a fragmentary simplified schematic view of a shedding device, and illustrates two lifting blades, each having associated therewith one of a pair of pulling elements and the retention device of FIG. 1.
FIG. 5 is an enlarged fragmentary perspective view of one of the pulling elements, and illustrates an upper coupling portion, a lower guiding portion, and cooperative means in the form of a projection or abutment which is associated with its lifting blade.
FIG. 6 is an enlarged fragmentary cross-sectional view of one of the pulling elements in its lower shed position and the associated electromagnet de-energized.
FIG. 7 is an enlarged fragmentary prospective view of an upper end portion of one of the lifting blades, and illustrates projection each cooperative with an associated port or opening of an associated pulling element.
FIG. 8 illustrates another shedding device of the present invention and illustrates two lifting blades and associated pulling elements having respective upwardly opening and downwardly opening cooperative hooks or hooking portions.
FIG. 9 is a perspective view of one of the pulling elements of FIG. 8, and illustrates the specific configuration thereof.
FIG. 10 is an enlarged cross-sectional view of one of the lifting blades and pulling elements of FIG. 8, and illustrates the same with the hooks or hook portions in engaged relationship.
FIG. 11 is another fragmentary sectional view of another shedding device of the present invention, and illustrates a pair of projections associated with each of a pair of pulling elements which are in turn cooperative with a pair of lifting blades.
FIG. 12 is an enlarged perspective view of one of the pulling elements of the shedding device of FIG. 11, and more clearly illustrates the details thereof.
FIG. 13 is another fragmentary diagrammatic view of a shedding device of this invention, and illustrates two lifting blades and two pulling elements with each pulling element having a pair of projections.
FIG. 14 is a perspective view of one of the pulling elements of the shedding device of FIG. 13, and illustrates one of the projections carried by a flexible strip with this projection being aligned with an opening or port of the pulling element.


DESCRIPTION OF THE PREFERRED EMBODIMENTS

A shedding device of the present invention includes a kinematic connecting member 1, which interconnects pulling elements in the form

REFERENCES:
patent: 4593723 (1986-06-01), Griffith
patent: 4936357 (1990-06-01), Keim et al.
patent: 4969490 (1990-11-01), Seiler
patent: 5002099 (1991-03-01), Seiler
patent: 5095952 (1992-03-01), Cheng
patent: 5309952 (1994-05-01), Speich
International Search Report dated Jun. 22, 1992.

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