Material or article handling – Plural – static structures for supporting discrete loads and... – Load-underlying members
Patent
1996-10-11
1998-11-03
Werner, Frank E.
Material or article handling
Plural, static structures for supporting discrete loads and...
Load-underlying members
414807, 414331, 414908, 414564, 414273, 36447806, 2425338, 242 355A, B65G 104
Patent
active
058299505
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a National Phase application of PCT/DE95/00222 filed 22 Feb., 1995 and based in turn, on German application P 4409522.8 filed 19 Mar., 1994 under the International Convention.
FIELD OF THE INVENTION
The invention relates to a process for loading the spool pegs of a spool rack or the like with full yarn spools, which are set by a loading device onto superimposed horizontal pegs of a transport carriage, which is moved on rails by a drive motor between the loading device and the rack, and is positioned with a sensor in a predetermined position in front of the rack, where the carriage pegs align with the pegs of the rack.
BACKGROUND OF THE INVENTION
Such a process is known from EP 0 467 101 A1. There a control contact assigned to a bottom rail serves for the positioning of the transport carriage and its pegs with respect to the spool pegs of the rack. This control contact is for instance a fastening screw of a toothed rack into which engages a driving pinion driven by a drive motor. With this known process, control contacts and or sensors have to be very finely adjusted to each other, so that the transport carriage stops exactly in the right position in front of the rack, for the alignment of the carriage pegs with the pegs of the rack. Only then it is possible to transfer the full spools from the transport carriage to the rack without problems. Besides in practice it is possible that a one-time adjustment of the transport carriage with respect to the rack is not sufficient. Depending on the construction of the rack and/or it use it can be necessary to change or supervise the setting of the positioning of the transport carriage.
OBJECT OF THE INVENTION
It is therefore the object of the invention to improve a process of the aforementioned kind, so that the time-consuming and complicated setting of the positioning of the transport carriage before and during the course of the process can be avoided.
SUMMARY OF THE INVENTION
This object is achieved by positioning the sensor at the height of one peg level of the rack, that the travel distances of the transport carriage during its movements are stored, that the sensor signals triggered by the rack pegs depending on the travel distance are stored, and that the transport carriage is steered into its spool transfer position by means of these stored signals.
It is important for the invention that the position of the rack pegs be measured automatically and that the transport carriage be steered correspondingly to the results of these measurements. The measurement of the positions of the rack pegs of one peg level can be repeated at any time, in order to detect changes in the position of the rack pegs, such as occur in the case of racks with chains by means of which the spool rows are positioned. The positioning of the vertical spool rows, respectively rack pegs, can be influenced by the flexibility of the chains, respectively by chain elongation. With the process of the invention it becomes possible to repeatedly determine the position of the rack pegs, at short time intervals. It is even possible to check the positioning of the rack pegs simultaneously with a loading process and to compare it with the stored values, in order to be able to make immediate or subsequent corrections. This way the steering of the transport carriage can be influenced immediately, which is of particular interest in the case when during the loading process of a rack the loading is performed with a transport carriage having only one row of carriage pegs and which loads the entire rack in successive rows.
An easy setting of the positioning of the transport carriage with respect to a spool rack is important also when several racks are involved in one operation, wherein the distances between the peg rows are possibly different. Then the process of the invention makes possible a quick and precise check of the positions of the rack pegs and a corresponding steering of the transport carriage.
The carriage pegs have to be aligned
REFERENCES:
patent: 4783021 (1988-11-01), Nagasawa
patent: 4988252 (1991-01-01), Yamamoto et al.
patent: 5091685 (1992-02-01), Sorensenetal
patent: 5180269 (1993-01-01), Nishioka
Dubno Herbert
Sucker-Muller-Hacoba GmbH & Co.
Werner Frank E.
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