Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1990-06-08
1992-10-20
Stodola, Daniel P.
Winding, tensioning, or guiding
Coil holder or support
Spool or core
225 4, B65H 3500
Patent
active
051562413
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a method of automatically breaking and removing a nearly depleted lap bobbin when a lap bobbin in use becomes a nearly depleted lap bobbin in a textile machine for processing laps which are supplied successively thereto, and an apparatus for carrying out such a method. The textile machine in this application denotes mainly a ribbon lap machine and a comber.
PRIOR ART
Where a ribbon lap machine is used as the textile machine, when the lap supplied to the ribbon lap machine is completely depleted, a sensor is activated and the machine is stopped. In a conventional case, the operator interrupts the present work upon the recognition of the lit pilot lamp and goes to the relevant ribbon lap machine or goes to the relevant textile machine after completing the present work, and then the operator breaks and removes an end portion of the residual lap extending over the plate, by hand, removes an empty bobbin, supplies a full lap bobbin to the lap feeder of the textile machine, and superposes the leading end of the lap sheet of the full lap on the trailing end of the preceding lap sheet.
Since such a textile machine has six or eight delivery units, the textile machine remains inoperative for a long time while the lap changing operation is performed six or eight times and, in some cases, the textile machine remains inoperative for still a longer time in case the lap changing operation, which requires skilled work must be performed over again. Accordingly, an efficiency of operation of the conventional textile machine of the foregoing type is very low.
Apparatus intended for automatically carrying out those steps of the lap changing operation have been proposed, to solve the above-mentioned problems. However, all those previously proposed apparatus are large in size, are obstructive to cleaning and maintenance work, and are unsatisfactory Thus, a practically satisfactory apparatus for automatic lap changing operation has not been proposed.
DISCLOSURE OF THE INVENTION
An object of the present invention is to provide a novel method of automatically breaking and removing a nearly depleted lap bobbin, heretofore impossible, and an apparatus for automatically breaking and removing the nearly depleted lap bobbin and used for carrying out such a method.
The object of the invention can be attained by a method for automatically breaking and removing a nearly depleted lap bobbin, characterized in that the method comprises steps of: holding the nearly depleted lap bobbin supported on a pair of lap rollers of a lap feeder of the textile machine at the opposite ends of the nearly depleted lap bobbin after the textile machine has been stopped; moving down the nearly depleted lap bobbin through the gap between the pair of lap rollers while the gap between the pair of lap roller is being increased or after the gap between the pair of lap rollers has been increased to a size allowing the nearly depleted lap bobbin to pass through the gap; breaking a lap sheet of the nearly depleted lap bobbin at an upstream position from the lap processing mechanism arranged on a downstream position from the lap feeder in the textile machine by stretching the lap sheet continuing to the nearly depleted lap bobbin by the movement of the nearly depleted lap bobbin; and releasing the hold of the nearly depleted lap bobbin to drop the nearly depleted lap bobbin onto a conveying device to carry out the nearly depleted lap bobbin.
An automatic nearly depleted lap bobbin breaking and removing apparatus suitable for carrying out the method for automatically breaking and removing a nearly depleted lap bobbin is characterized in that the apparatus is comprised of a lap holding device capable of holding the nearly depleted lap bobbin supported on front and back lap rollers of a lap feeder at the opposite ends of the bobbin thereof and capable of turning around the front lap rollers; a support shaft supporting the back lap roller and capable of moving the back lap roller away from the front lap roller; and a
REFERENCES:
patent: 3582010 (1971-06-01), Whiteman
patent: 4892610 (1990-01-01), Sano
patent: 4996747 (1991-03-01), Wichtermann et al.
Hotta Takaomi
Kobori Seiji
Serizawa Yasuhiro
Sugie Tosio
Yamada Yoji
Darling John P.
Kabushikikaisha Hara Shokki Seisakusho, Ibi
Nisshinbo Industries,Inc.
Stodola Daniel P.
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