Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1987-06-05
1989-11-14
Gilreath, Stanley N.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
242 18R, B65H 5422, B65H 6708
Patent
active
048801763
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a yarn end finding device for releasing a bunch winding wound around an end of a spinning bobbin to find a yarn end.
2. Description of the Related Art
To one end of a spinning bobbin around which yarn is wound by a spinning machine, particularly a ring spinning machine is applied a bunch winding around which a plurality of yarn ends are wound to prevent the yarn being transported from being released. In supplying such a spinning bobbin to an automatic winder in the rewinding step, the bobbin is supplied in the state wherein said bunch winding is released.
For this reason, various yarn end finding devices have been proposed. For example, a yarn end is released by a suction air while injecting compressed air toward the end of the bobbin in a direction of releasing the yarn. Alternatively, a bunch winding is gripped by an opening and closing gripper in the form of scissors and moved relatively in an axial direction of a bobbin to forcibly remove the bunch winding in a pull-out fashion rather than releasing.
According to the devices as described above, where air is used, in a bobbin to which a yarn end is clung, yarn end finding error sometimes occurs. Also in the forcibly pull-out type, in the firmly wound bunch winding, there involves drawbacks in that a releasing error occurs, and the surface of the take-up tube is scratched.
SUMMARY OF THE INVENTION
The present invention overcomes the above-described drawbacks and provides a positive yarn end finding device.
According to an embodiment of the present invention, a peripheral surface of a roller which rotates around one axis is pressed against the bunch winding position of a spinning bobbin, and a rotary axis of the roller is inclined in a direction different from the direction of inclination of the axis of a take-up tube.
The peripheral surface of the roller, which rotates around the axis in a direction of rotation which is different from the direction of rotation of the take-up tube, is pressed against the bunch winding position to provide a force for gradually displacing a yarn layer of the bunch winding wound around the take-up tube toward the axis of the take-up tube, thus easily releasing even the firmly wound bunch winding.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a front view showing an apparatus according to an embodiment of the present invention;
FIG. 2 is a plan view of the apparatus shown in FIG. 1;
FIG. 3 is an explanatory plan view showing the relationship between a rotating axis of a rotary roller and an axis of a bobbin according to an embodiment of the present invention;
FIG. 4 is a plan view showing a bobbin transporting passage according to an embodiment of the present invention;
FIG. 5 is a schematic view showing a yarn running area of a released yarn end according to an embodiment of the present invention;
FIG. 6-A is a front view showing the relationship between a turning force of a roller and a bobbin rotation according to an embodiment of the present invention;
FIG. 6-B is a front view showing the initial state wherein a wound yarn is unwound according to an embodiment of the present invention;
FIG. 6-C is a front view which illustrates the state a wound yarn is further unwound according to an embodiment of the present invention;
FIG. 6-D is a front view showing the state wherein the unwound yarn is attracted by an attracting pipe according to an embodiment of the present invention;
FIG. 6-E is a front view showing the state wherein a bunch winding is completely released according to an embodiment of the present invention; and
FIG. 7 is a plan view of FIG. 6-A.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The embodiments of the present invention will be described hereinafter with reference to the drawings.
In FIGS. 1 and 4, a spinning bobbin 1 in the state being inserted and stood on a tray 4 formed from a peg 3 projected on a disc-like base plate 2 is transported in a direction as indicated by arrow 9 along a passage 8 formed by guide plate
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Kino Yoshihiro
Matsui Isamu
Otojima Hirao
Uchida Hiroshi
Gilreath Stanley N.
Murata Kikai Kabushiki Kaisha
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