EP0393363A1 - Method for automatic clearing of full bobbins on a bisectional textile machine, especially a winding-, spinning- or twisting machine - Google Patents

Abstract

A method for the automatic clearing of the full bobbins of a bisectional textile machine, especially a winding, spinning or twisting machine on random exchange by means of at least one automatic manipulator (7R,7L) guided along the longitudinal sides of the machine and for depositing the cleared run-off bobbins (3) onto a periodically movable conveyor band (5) common to the two machine sides, arranged in the longitudinal centre of the machine and followed by a buffer zone (6). The manipulator (7R,7L) checks at each point (5.8, 5.5) of a due bobbin change, before the transfer of a full bobbin (3.8R, 3.5L) to the conveyor band (5), whether the conveyor band is free or is already occupied by a full bobbin at this point. In the event of occupation, the manipulator (7R,7L) sends to the conveyor-band drive (8) a control signal, by means of which the conveyor band (5) is periodically moved further until a free position on the conveyor band is reached at this point. As soon as the buffer zone (6) is completely filled with full bobbins (3'), an overriding monitoring device (12) emits an alarm signal which triggers a clearing operation for the conveyor band (5). A degree of utilisation of more than 50 % of the conveyor band can be achieved with the method. …<IMAGE>…

Description

The invention relates to a method for the automatic clearing of the winding or take-up reels of a two-sided textile machine, in particular a winding, spinning or twisting machine when changing wildly by at least one handling machine guided along the long sides of the machine, and for depositing the cleared take-up reels on both machine sides Common, intermittently movable conveyor belt arranged in the longitudinal center of the machine, to which a buffer section follows.

Modern textile machines are constructed as multi-position machines, with conveyor belts which are accommodated in the area of the central longitudinal axis of the machine inside the machine frame being able to remove the winding packages. The finished packages are transferred to these conveyor belts either manually or by automatic handling machines. If the bobbins are exchanged in the so-called wild change, in which the replacement takes place at the places that may be relatively far apart where an exchange is required, the problem arises in a two-sided textile machine that a position on the conveyor belt occurs which a package is to be put down is already occupied, because a package has already been put down from the opposite side of the machine.

In order to solve this problem, it is already known to arrange two conveyor belts along the central axis of a textile machine. Such devices are described for example in DE-OS 32 44 015 and DE-OS 33 32 409.

In these known devices, the coil conveyor belts are arranged next to one another in one plane and run in opposite directions. At one end of the two conveyor belts there is a device for transferring the coils from one conveyor belt to the other conveyor belt. With such a device, a collision between coils to be deposited from one or the other machine side cannot occur. The disadvantage of such a device is that it becomes a wide textile machine leads, which has a great influence on the space conditions when installing the machine.

It is also described in DE-OS 35 11 815, an automatic winder with a mobile bobbin changer, which has a bobbin conveyor belt, with a bobbin gripping and lifting device serving as a memory expansion being arranged above the bobbin conveyor belt, onto which bobbins can be transferred from the bobbin conveyor belt and temporarily stored. However, the bobbins are not conveyed further on the bobbin gripping and lifting device, but have to be transferred back to the bobbin conveyor belt for further transport.

The object underlying the invention was to provide a method with the features specified at the outset under the preamble of claim 1, with which it is possible, despite the arrangement of a single conveyor belt in the longitudinal center of the machine, from both sides of the machine on the reels Place the conveyor belt in such a way that the greatest possible utilization of the storage positions available on the conveyor belt is achieved without there being any disruptions or the entire conveyor belt having to be cleared continuously or at short intervals.

This object is achieved according to the invention with the features from the characterizing part of patent claim 1.

Advantageous embodiments are described in the subclaims.

The basic idea of the invention is to ensure, by means of a corresponding control of the conveyor belt, that a free position on the conveyor belt is always available or can be made available, regardless of the point at which a bobbin change is to be carried out during the wild change. In the method according to the invention, a package placed on the conveyor belt can remain in the same place on the conveyor belt as long as it is not required for a next change. This is the case, for example, when a spool change takes place from one machine side on the opposite machine side after a package has been placed on the conveyor belt. In this case, the conveyor belt continues to be controlled by the handling machine until a free position is reached at the relevant point.

It has been shown that an extraordinarily good degree of utilization of the conveyor belt can be achieved with the method according to the invention before the entire conveyor belt has to be cleared. This applies in particular if the buffer section is included in the process, such that when the conveyor belt is clocked further, the winding packages reaching the end of the conveyor belt are taken over by the buffer section, which gradually fills up, so that a clearing process only needs to take place when the entire buffer zone is filled. It has been shown that the achievable degree of utilization of the positions of the conveyor belt for a predetermined number of storage positions on the conveyor belt, which are dependent on the number of places on the machine, increases with the number of places available on the buffer line, on the other hand, of course, should be possible good degree of utilization with as little as possible Buffer places can be reached. It has been shown that a very good utilization of the conveyor belt can be achieved if the number P of places on the buffer route with the total number of positions on the conveyor belt corresponds at least approximately to the relationship P = N.

The checking of the positions of the conveyor belt for the status “occupied” or “free” by the handling machine is expediently carried out using contactless sensors, which can be designed as reflection light barriers.

It has furthermore been found that, in the wild change, the statistical distribution of the due bobbin changes over the entire length of the machine is so good after a relatively short time that an extraordinarily good degree of utilization of the conveyor belt is reached before the buffer line has to be occupied.

With the method according to the invention, utilization of the positions of the conveyor belt of more than 50% can be achieved without great effort.

Exemplary embodiments of the method according to the invention are explained in more detail below with reference to the accompanying drawings.

• Fig. 1 in einer stark schematisierten stirnseitigen An­sicht den Auflaufbereich einer Spinn- oder Zwirn­maschine;
• Fig. 2 in einer schematisierten Draufsicht die Maschine nach Fig. 1;
• Fig. 3 in einer tabellarischen Übersicht den Füllungs­vorgang eines Transportbandes mit 64 Auflage­positionen bei einer Pufferstrecke mit 8 Plätzen.

The drawings show:

• 1 shows a highly schematic front view of the run-up area of a spinning or twisting machine;
• Fig. 2 shows the machine in a schematic plan view according to Fig. 1;
• Fig. 3 in a tabular overview, the filling process of a conveyor belt with 64 support positions with a buffer section with 8 places.

In Fig. 1, the run-up area of a spinning or twisting machine is shown from an end view. The typical two-sided construction of the machine can be seen, the left machine side being designated with 1 L and the right machine side with 1 R in FIG. 1. In a way not specifically shown, the threads come from the spinning or twisting points of the machines and are wound up in the run-up area to form 3 L or 3 R spools, each of which is supported in a 2 L or 2 R spool frame, and by a 4 L friction drive or 4 R are driven. A conveyor belt 5 is arranged in the longitudinal center of the machine. When changing the bobbins, the bobbins 3 L and 3 R are picked up by a handling machine (not shown in FIG. 1), removed from the bobbin frame 2 L and 2 R, and, as indicated by the arrows f 1, f 2, placed on the conveyor belt 5 , on which a coil 3 is shown. On the conveyor belt 5 is shown in Fig. 1 descending a buffer section 6, on which a coil 3 'is shown there.

The more precise sequence of the method for automatic clearing of the package is explained below with reference to FIG. 2.

The machine shown has 2 X 9 winding or twisting points. The corresponding packages are labeled 3.1 L to 3.9 L on the left and 3.1 R to 3.9 R on the right. The packages are in their different winding conditions shown.

The conveyor belt 5 can be moved step by step in the direction of the arrow by a drive 8 and has a total of 9 support positions between opposing twisting or spinning positions, which are denoted by 5.1 to 5.9.

The buffer section 6, which is also designed as a conveyor belt, has its own drive 9 and at its end a sensory end stop 10, which is coupled to a signal transmitter 11, which emits a clearing signal to a monitoring device 12, not shown, when all the places in the buffer section 6 are occupied. Of course, the buffer section can also be designed as a slide or roller conveyor without drive.

Two handling machines 7 L and 7 R can be moved along the two long sides of the machine, which carry out the bobbin changes. Of course, there can also be a single handling machine that operates both machine sides.

Each of the handling machines 7 L and 7 R has a device 7.1 L or 7.1 R with which it can check whether a change of bobbins at the corresponding position 5.1 or. 5.9 there is an empty space on the conveyor belt or a take-up spool is already deposited. These devices are designed for the purpose of non-contact sensors of a type known per se, for example as photocells which react to a scanning light beam or a light barrier emitted by the handling machine.

In the operating state shown in FIG. 2, 4 take-up spools are already deposited on the conveyor belt 5 at positions 5.4, 5.5, 5.7 and 5.9. Another package 3 'is already on the buffer section 6th

If, for example, the spool 3.8 R is now fully wound on the right-hand side and is to be replaced by the handling machine 7 R, it first checks by means of the device 7.1 R whether the corresponding position 5.8 on the conveyor belt is free. This is the case in the illustrated embodiment, and the reel 3.8 R can be placed on the conveyor belt 5.

In the meantime, the 3.5 L package has been fully wound on the left side of the machine and is to be replaced by the 7 L handling machine. The examination of the corresponding position 5.5 on the conveyor belt 5 by the device 7.1 L shows that a package has already been deposited from the opposite side. So the space is not free. Position 5.4 is also already occupied by a package that has been placed on the left side. The handling machine therefore gives control signals to the drive 8 via the line 7.2, which can be, for example, its own travel rail, which leads to the cyclical further movement of the conveyor belt 5. These control signals are given until the further movement of the conveyor belt 5 would lead to a free position at point 5.5.

As can be seen from FIG. 2, the conveyor belt 5 is already occupied with 5 winding spools, that is to say to more than 50% of its positions. If now the handling machine 7 L emits its control signal to the drive 8, the winding package 3 is transferred to the buffer section 6, which is thus fully occupied, in one movement cycle. The result of this is that a signal is sent to the monitoring device 12 via the signal transmitter 11, which triggers a clearing process of the entire conveyor belt 5.

For reasons of simplicity of illustration, FIG. 2 shows an exemplary embodiment with only very few spinning or twisting points and only a few buffer spaces. In general, conventional spinning or twisting machines have many more spinning or twisting points and the number of places on the buffer section is correspondingly larger.

In order to better illustrate the degree of utilization in this method, the step-by-step implementation of the method is illustrated in the form of a table with the aid of FIG. 3 using an example of a machine with a conveyor belt with 64 support positions and a buffer path of 8 places.

The representation in FIG. 3 is structured like a matrix, the rows of the matrix each denoting the successive method steps, while the first eight columns represent the locations on the buffer line and the following 64 columns represent the positions on the conveyor belt. The positions occupied by the package are marked with a "0".

As can be seen from the first line, the process begins by placing four take-up spools on the conveyor belt. In the second to sixth lines, additional spools are added without the conveyor belt having to be cycled further. Only in the seventh line is that Conveyor belt clocked by one position because a spool should be placed in column 45, i.e. at position 45, and at this point, as you can see from line 6, there is already a spool. A further movement step by one cycle takes place in line 11. With this step a spool has reached the end of the conveyor belt, and in a further movement step this spool is transferred in line 17 to the buffer line. There are now further editions and clock cycles until the buffer line in line 24 is fully occupied with eight winding spools. There are now 34 take-up reels on the conveyor belt, which corresponds to an occupancy rate of 53%. If you add the 8 coils on the buffer section, a utilization of approx. 66% can be achieved when clearing.

The signal already described is now emitted from the buffer section, which triggers the clearing process for the entire conveyor belt including the buffer section.

Claims (5)

1.Procedure for automatically clearing the winding spools of a double-sided textile machine, in particular a winding, spinning or twisting machine when changing wildly by at least one handling machine guided along the long sides of the machine and for depositing the cleared winding spools on both sides of the machine, common in the longitudinal center of the Machine-arranged, cyclically movable conveyor belt, which is followed by a buffer section, characterized in that the handling machine (7 L, 7 R) at every point of a due reel change before the transfer of a package (3.5 L, 3.8 R) to the conveyor belt (5 ) checks whether the conveyor belt is free at this point or already occupied by a take-up spool, and in the event of an occupation, feeds a control signal to the conveyor belt drive (8), by means of which the conveyor belt (5) is moved in cycles until this point (5.5 , 5.8) a free position on d em conveyor belt (5) is reached. 2. The method according to claim 1, characterized in that as soon as the buffer section (6) with winding packages (3 ') is completely filled, a signal is given to a higher-level monitoring device (12), which is a clearing process for the buffer section (6) and the conveyor belt (5) triggers. 3. The method according to claim 2, characterized in that the number P of spools (3 ') on the buffer section (6) occupied spaces at least un The square root of the total number N corresponds to the positions (5.1 to 5.9) that can be occupied by take-up reels on the conveyor belt (5). 4. The method according to any one of claims 1 to 3, characterized in that the checking of the conveyor belt (5) for occupancy of a position with a package by the handling machine (7 L, 7 R) by means of contactless sensors (7.1 L, 7.1 R) he follows. 5. The method according to claim 4, characterized in that the non-contact sensors (7.1 L, 7.1 R) are designed as reflection light barriers.

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