GB2196995A

GB2196995A - Removing bobbins from textile machines

Info

Publication number: GB2196995A
Application number: GB08722503A
Authority: GB
Inventors: Frantisek Burysek; Genadij Michajlovic Ivanov; Genadij Viktorovic Zemskov
Original assignee: Vyzkumny Ustav Bavlnarsky AS
Current assignee: Vyzkumny Ustav Bavlnarsky AS
Priority date: 1986-10-29
Filing date: 1987-09-24
Publication date: 1988-05-11
Anticipated expiration: 2007-09-24
Also published as: CS782586A1; RU1819845C; DE3731125A1; GB2196995B; CH673999A5; GB8722503D0; CS259115B1

Description

1 GB2196995A 1

SPECIFICATION

Textile machine -- J 1 15 The invention relates to a textile machine. 70 In the German DE-OS No. 3,332,409 a tex tile machine is described, wherein at either side of the machine a separate belt conveyor extends along the row of bobbin holders. Full bobbins after being doffed are put on the con veyor and delivered at the machine end by means of a manipulating device into a tran sport container. Such an arrangement compris ing two belt conveyors by which the machine width and weight are unwantedly increased, is disadvantageous from the economical view points of manufacture and operation.

The textile machine disclosed in the German DE-OS No. 2,842,432 has a single belt con veyor extending along the row of bobbin hol ders and followed, at the machine end adja cent the drive box, by a manipulation -device for depositing bobbins into a transport truck.

Such an arrangement is disadvantageous in that the bobbins doffed from the holders are deposited onto the belt conveyor from both sides of the machine whereby collisions of bobbins, serious failures in transport thereof, bobbin damaging, or the like, may occur.

It is an object of the invention to improve textile machines with a single belt conveyor and to solve the problem of depositing"'full bobbins onto the belt conveyor even in such cases that a space on the conveyor opposite the bobbin being doffed is already occupied by a previously doffed bobbin.

To meet this object there is provided a tex tile machine comprising bobbin holders ar ranged side-by-side along the machine'and de signed for supporting bobbins for winding yarn, a belt conveyor extending along the rows of bobbin holders, an automatic doffer adapted for travelling along the machine -and designed for doffing full bobbins off said bob bins and depositing them onto said belt cOn veyor, and a control device for controlling the operation of said automatic doffer, wherein the automatic doffer is provided at its side facing the belt conveyor with a sensor-for detecting free space above the belt conveyor, the sensor being connected to the control de vice provided with a blocking device for pre venting another bobbin from being doffed un less the previously doffed bobbin is deposited onto the belt conveyor.

An advantage of this arrangement consists in that a bobbin doffed by the automatic dOf fer is put only on a free space on the belt conveyor whereby the problems of prior art as hereinabove set forth are eliminated. The arrangement is very simple and does not re quire any substantial interventions into the ma chine structure.

A preferred embodiment of the invention will hereinafter be described, by way of 130 example, with reference to the accompanying schematic drawing, in which:- Figure 1 shows a total top view of an openend rotor spinning machine; and Figure 2 is a detail top view of a variant of sensor provided on an automatic doffer.

Fig. 1 shows a textile machine such as an open-end rotor spinning machine, comprising side boxes 1, 2 at its ends, and an intermedi- ate section, wherein bobbin holders 3 for supporting bobbins 4 are provided in two rows in side-by-side arrangement. The bobbin holders 3 are of well-known arm type and since they are irrelevant as to the subject matter of the invention, they are neither described nor shown here in detail. Between the two rows of bobbin holders 3, i.e. in the machine interior, there is provided a belt conveyor 5 onto which doffed bobbins are deposited. The belt conveyor 5 is also arranged in the machine in a known and therefore not specified manner.

On rails extending about the machine there is arranged an automatic doffer 6 of a known type, which is either provided with a separate control device 7, or connected to a similar control device 7 housed in one of the side boxes 1, 2 where control means such as drives for the entire machine are received. 95 Fig. 1 shows such a control device 7 in the form of a block only without precisely locating it in the machine, since it is irrelevant as to the subject matter of the invention. At is side facing the belt conveyor 5, the automatic doffer 6 is provided with a sensor 8 for detecting free space above the belt conveyor 5. The sensor is coupled to the control device 7 which controls, by means of its control and evaluating circuit, the operation of said automatic doffer 6, as hereinafter explained more in detail. The automatic doffer 6 is further provided with a blocking device 9 or a blocking electrical circuit designed for preventing another bobbin 4 from being doffed when the belt conveyor 5 cannot be supplied, owing to the lack of free space, with the previously doffed bobbin 4. It is only after the delivery of the bobbin onto the belt conveyor 5 that the automatic doffer is allowed to doff another bobbin 4.

The sensor 8 can be of various types such as a micro-switch with contact arm, a photoelectric gate, or the like. In this case it is preferably to use the last-mentioned embodi- ment since it enables two or more scanning channels 10, 11 to be provided. Thus it is made possible to scan, by way of example, with width H of the space above the belt conveyor 5, said width H equalling, e.g. to the spacing between two adjacent working stations or spinning units, or other elements of the machine. If, however, the bobbin is to be deposited onto the belt conveyor 5 transversely, the width H should be equal to at least the diameter D of the full bobbin 4.

2 GB2196995A 2 Between the extreme scanning channels 10 there are preferably provided intermediate scanning channels 11 which are spaced from each other at a distance h equalling at most the minimum adjusted diameter D of bobbins 4 to be doffed whereby it is made possible to vary the diameter of bobbins, or to doff them even if they have not reached the predetermined diameter. The scanning channels 10 and 11 are preferably arranged in the sensor 8 adjustably. In this case the bobbin diameter and the corresponding depositing room on the belt conveyor 5 can be adapted to each other.

In such a case the belt conveyor 5 assumes the function of a reservoir for the bobbins 4 and it is only after it has been filled up that it is set, e.g. by the operator, in operation so that the bobbins are removed therefrom at the machine end and stored in a container. For such a case it is advantageous, then the bell conveyor 5 is connected to a separate control unit 12.

Apart from this, the autorntic doffer 6 can preferably be provided with a signalling instal- lation 13 for indicating the occupation grade of the belt conveyor 5.

The machine can also be provided with any of known receptacles for bobbins which can be either put to the side box, or attached thereto.

In operation, the automatic doffer 6 is recalled in well-known manner. The control device 7 allows the bobbin 4 to be doffed and deposited onto the belt conveyor 5 only, if the sensor 8 does not release any occupation signal, i.e. if free space on the conveyor 5 is available. In the negative case, the exchange of bobbin is not effected and the automatic doffer 6 is displaced to the next working sta- tion, or the bobbin 4 is removed from the holder 3 but kept by the doffer 6 which deposit it onto the belt conveyor 5 till it finds, during its travel about the machine, any free space. In this way any bobbin collision on the belt conveyor is prevented.

Apart from the above-described operation, the invention is to cover other possible processes as, e.g. when the control device 7 of the automatic doffer 6 is coupled with the drive of belt conveyor 5 and the latter is dis- placed by one or more spacings in one or other direction so that a free space on the belt conveyor will face the station to be ser viced.

Needless to say that the conveyor as here inabove referred to need not be always of a belt type since it is irrelevant with respect to the invention; the scope of the invention com prises any of types of overhead or suspended conveyors.

Similarly, the bobbin exchange devices do not form the subject matter of the invention and therefore they are not specified here in detail.

Another advantage of the invention consists in that the doffed bobbins can be deposited onto the stopped conveyor and withdrawn therefrom whenever because the conveyor takes a relatively great amount of bobbins, and that the next bobbin doffing process can be easily automated.

Claims

1. A textile machine comprising bobbin holders arranged side-by-side along the machine and designed for supporting bobbins for winding yarn, a belt conveyor extending along the rows of bobbin holders, an automatic doffer adapted for travelling along the machine and designed for supporting bobbins for winding yarn, a belt conveyor extending along the rows of bobbin holders, an automatic doffer adapted for travelling along the machine and designed for doffing full bobbins off said bob- bins and depositing them onto said belt conveyor, and a control device for controlling the operation of said automatic doffer, wherein the automatic doffer is provided at its side facing the belt conveyor with a sensor for detecting free space above the belt conveyor, the sensor being connected to the control device provided with a blocking device for preventing another bobbin from being doffed unless the previously doffed bobbin is deposited onto the belt conveyor.

2. A textile machine according to claim 1 wherein the belt conveyor is connected to a separate control unit.

3. A textile machine according to claim 1, or claim 2 wherein the sensor is provided with at least two scanning channels which are spaced apart from each other at a distance which corresponds at least to a spacing of spinning unit, or to the diameter of bobbins to be doffed.

4. A textile machine according to claim 3 wherein the sensor has between its extreme scanning channels intermediate scanning channels which are spaced apart from each other at a distance corresponding to a predetermined minimum diameter of the bobbin to be doffed.

5. A textile machine according to any one claims 1 to 4 wherein the automatic doffer or the control device is provided with a signalling installation for indicating the occupation grade of the conveyor.

6. A textile machine substantially as hereinbefore described with reference to the accom- panying drawing.

Published 1988 at The Patent Office, State House, 66/71 High Holborn, London WC 1 R 4TP. Further copies may be obtained from The Patent Office, Sales Branch, St Mary Cray, Orpington, Kent BR5 3RD. Printed by Burgess & Son (Abingdon) Ltd. Con. 1/87.

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