JPH02229232A - Apparatus for performing ending on spinning position of spinning frame - Google Patents

Abstract

PURPOSE: To prevent generation of a tension peak while quickly emptying an intermediate storing device by connecting a controller to a device for determining the expected point in the time of the using-up of the intermediately stored yarn length and controlling a reduction of the speed of the winding-up device according to the determination. CONSTITUTION: After a splice bonding of a former yarn 10 with a new yarn 20, a splice device 9 is opened and the bonded yarn is released and the newly produced yarn is stored in the intermediate storing device 17 in a stretched state in a yarn spool 18. Detectors 21 and 22 detect the point of time that the yarn spool 18 attains a residual value and separates from the range of the detectors 21 and 22 and a controller 24 calculates a residual time that the excess length of the yarn is completely consumed and arrives an operation fitting position (dotted line 5). According to the result, the controller controls a driving part 26 so as a high winding-up speed at the residual time to be reduced to a winding-up speed of a low fitted operation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a device for receiving the end of the yarn before it has been wound onto a bobbin, and
e) a device for receiving the new thread produced by e), a device for joining the previous thread with the new thread, a device for intermediately accommodating the thread length of the new thread produced during the joining, and a device for accommodating the thread length of the new thread produced during the joining; a device comprising a drive for winding onto a bobbin, the drive being controlled by a control device to maintain an increased speed compared to the operating speed until the intermediately stored yarn length has been consumed. The present invention relates to a device for splicing yarn at the spinning position of a spinning machine.

A device of this type is the subject of a previously unpublished German patent application P3829151.7. The aim is to empty the intermediate storage device as quickly as possible after the end of the thread binding, so that the spinning station in question can be returned to its working condition as quickly as possible.

This is particularly useful in the case of equipment that is movable and that engages a large number of spinning positions, so that the equipment can react as quickly as possible to splicing operations at different spinning positions. . On the other hand, care must be taken to ensure that too high a thread load does not occur during discharge from the intermediate storage device. If this is not the case, yarn breakage may occur, especially for yarns with low tear strength. A particularly dangerous point is at the end of the consumption of the intermediately stored thread length, since at the latest then it can no longer be pulled at the high winding speed. If this is not the case, tension peaks may occur which lead to yarn breakage.

The object of the invention is to design a device of the type mentioned at the outset in such a way that, on the one hand, it is possible to quickly empty the intermediate storage device and, on the other hand, tension peaks are largely avoided.

This objective is achieved in that the control device is connected to a device for determining the expected point in time of consumption of the intermediately stored thread length and the winding device controls the speed reduction accordingly.

This configuration makes it possible to cope with the situation in which the winding process when emptying the intermediate storage device can be carried out under very different conditions and at very different speeds. The bobbins can have very different diameters and/or differences in winding density and therefore also in the hardness of their surfaces, giving rise to very different acceleration behavior;
These behaviors accelerate the bobbin to high winding speeds. It should be kept in mind that the thread must never be wound onto the bobbin in a loose state, otherwise problems may occur during further processing. In order to account for these different situations leading to different slippage between the drive element and the bobbin, the winding is monitored and the point in time at which the intermediately stored yarn length is expected to be consumed is determined.

Tension peaks are avoided since the speed of the bobbin is controlled accordingly. This makes it possible to control the speed at the beginning and end of the winding more precisely with higher speeds, so that a smooth transition is maintained.

In a further development of the invention, it is provided that the control device includes a computer for determining the remaining time of yarn consumption, said computer also having an output generating a signal representing the yarn length to be wound up. Device is engaged. The drive is thus controlled according to the actual conditions, so that any sources of defects due to different slip conditions between the drive element and the bobbin are corrected.

In a first embodiment of the invention, it is provided that the transmitting device includes a device for detecting the length of the thread loop received in the intermediate storage device. In other words, by continuous monitoring of the intermediately stored yarn length, the emptying of the intermediate storage device can be controlled in a very precise manner.

In a further embodiment of the invention, it is provided that the transmitting device includes a device arranged in the intermediate storage device for detecting the point in time during which the stored thread ring exhibits a preset residual value during ejection. . The time point at which this residual value of the thread ring is reached is a sufficiently precise signal from which the expected end of the consumption of the intermediately stored thread length can be calculated.

In another embodiment of the invention, an auxiliary storage device for receiving a certain yarn length is arranged before the intermediate storage device;
It is also provided that the transmitting device includes a detection device when the thread leaves the intermediate storage device. In these embodiments, it does not matter what length of yarn is actually stored in the intermediate storage device.

In a further embodiment of the invention, it is provided that the transmitting device includes a device for detecting the course of the winding speed after the combination of the previous thread and the new thread.

This embodiment provides that it is possible to determine with sufficient precision how much thread length is stored in the intermediate storage device, so that the point at which the thread length is consumed can be determined by the course of the winding speed. A further embodiment provides, under the same conditions, that the transmitting device includes a detection device for the thread length withdrawn from the intermediate storage device after coupling. In this case, too, it is assumed that the yarn length to be drawn off is known with sufficient accuracy. Since this length is determined by the delivery speed of the spinning position where the splicing is performed, it can be given with sufficient accuracy.

Other characteristics and advantages of the invention will emerge from the following description of the embodiments illustrated in the drawings.

FIG. 1 is a schematic representation of the device according to the invention during the operation of joining the previous yarn with the new yarn and during the operation of feeding the intermediate storage device.

FIG. 2 is a schematic diagram of the apparatus of the embodiment of FIG. 1 at a later point in time, ie after the thread binding has been carried out and during the winding up of the intermediately stored thread length.

FIG. 3 is a schematic illustration of the device according to FIGS. 1 and 2 after the end of the piecing and the intermediate storage device has been emptied; FIG.

FIG. 4 is a schematic diagram of a device similar to FIGS. 1 to 3 during the thread drawing operation after performing a thread piecing, which is equipped with a transmitting device for detecting the drawn-out thread length or the progress of thread drawing; FIG. It is.

FIG. 5 is a view of another embodiment of the invention similar to FIG. 1 during emptying of an intermediate storage device with an auxiliary storage device for receiving a loop of thread of a certain length;

These drawings show the feed device (1) of only one of the individual spinning positions of the spinning machine, which device consists of two feed rollers (2 and 3). These feed rollers (2 and 3) rotating in the direction of the arrow (A) are
Feed the thread (4) in the direction of the arrow (B). As indicated by the dotted line in FIG. 1, the fed yarn (5) advances in the direction of the arrow fD) towards a winding device comprising a take-up roller {6} rotating in the direction of the arrow fc). The winding roller (6) drives, in a manner not shown in detail, a bobbin (7) supported by a bobbin frame, which during operation is in the position (8) shown in dotted lines. When winding a yarn (5) with a relatively low tear strength, for example a double yarn (5) consisting of two yarn components only pre-strengthened by pneumatic false twist spinning, the winding speed is equal to the feed rate. It is only slightly larger. This speed difference should remain large enough to ensure that sufficient thread tension is maintained to obtain proper bobbin construction.

After yarn breakage, yarn splicing must be performed at the spinning position. In principle, this is the take-up reroller (6)
This is done by pulling out the previous yarn (10) from the bobbin (force) lifted from the bobbin and combining it with the new yarn (20) fed in again by reactivation of the spinning position.

This connection is effected, for example, by a pneumatic splicing device (9) into which the previous thread (10) and the new thread (20) are inserted. A splicing device (9) arranged on an arm (16) of a mobile maintenance device, preferably deliverable to the spinning position, has a splicing line (l1) into which both yarns (10.20) are inserted. Equipped with This splice line is connected via a pressure air nozzle (14) to a pressure air supply line (15), which is connected in a known manner via a valve to a pressure air source.

Splice fitting! ! l (91) is provided with a thread gripper (12.13) whose position is only indicated. During the performance of the splice, both threads (10.20) are held in the gripped state. Further lengths of yarn (20) fed from the feeding device (1) are received in the intermediate receiving device (17).

As already mentioned, the maintenance equipment which carries out the splicing and which can be run along the spinning machine and which can be delivered to the individual spinning stations is shown schematically and therefore incompletely. This maintenance device includes suction-type grits bars (not shown), which pull the thread (10) in front of the bobbin (7).
) and insert it into the splicing device (9). The bobbin (7) is thereby driven by an auxiliary take-up reroller (27), which can pivot around an arm (28) and has a schematically illustrated drive (26). The auxiliary winding roller (27) can be driven in both rotational directions by this drive. In addition, maintenance equipment
It is equipped with a suction gripper which receives the newly spun yarn in the feeder fl (1) and inserts it into the splicing device (9).

As soon as the splice between the previous thread (IO) and the new thread (20) has taken place, the splicing device (9) opens, so that the joined thread (29) is released (FIG. 2).
. The auxiliary winding roller (27) moves in the winding direction (arrow direction H).
), the bobbin (7) is driven in the winding direction (arrow direction I). The combined thread (29) is pulled in the direction of the arrow (K) and wound onto a bobbin (force).

The combined thread (29) is pulled out of the intermediate storage device (17) in the direction of the arrow (G), while at the same time the thread enters the intermediate storage device (17) in the direction of the arrow (E). The intermediate receiving device ill (17) consists, for example, of a tube which is open on one side and can be delivered with its open end to the running position of the yarn, which tube is connected to a source of suction air so that the suction in the direction (F) is A force is generated, which forces the newly produced thread into a thread ring (1
8) in the form of an intermediate receiving device [(1 7) held under tension. In order to empty the intermediate storage device (17), the winding speed (movement in the direction of the arrow G) must be greater than the feed speed (in the direction of the arrow E). In order to empty the intermediate storage device (17) as quickly as possible, the bobbin (7) is driven at the highest possible winding speed.

Once the intermediately stored yarn length has been used up and the yarn has essentially returned to its working condition (dotted line 5 in Figure 1), no tension peaks can occur that could lead to yarn breakage, and the bobbin can therefore be reused. The winding speed must again be adapted to the feed speed of the feed device (1) so that it can be returned to the take-up reroller (6) (position 8 in FIG. 1). At this time, in order to realize a smooth transition from a high winding speed to a winding speed in a low operating state in a timely manner, the drive unit (26) of the auxiliary winding roller (27) is controlled to control the speed of the auxiliary winding roller (27). A connection (2) is connected to a control device (24) including a computer that controls the
5). A control device (24) is connected via a connection line (23) to a detector (21.
These detectors (2l, 22) are connected to an intermediate storage device (17).
), the thread ring (18) reaches the residual value and the detector (21.
22) Detect the time of leaving the range. Control device (24
) calculates on this basis the remaining time until the excess length of thread is completely consumed and the thread reaches the working fit position (dotted line 5 in FIG. 1). The control device (24) accordingly controls the drive (26) in such a way that the high winding speed during the residual time is reduced to a low operationally compatible winding speed. Subsequently, the bobbin (7) is returned to the winding roller (6) at the spinning position (first
position 8, see also Figure 3). It can then be provided that the auxiliary winding roller (27) follows the bobbin (7) until a sufficient conveyance between the winding roller (6) and the bobbin (7) is achieved. Bobbin (force is (position 8)
) for a short period of time by both the auxiliary winding roller (27) and the winding roller (6).

In the variant shown in FIG. 3, the bobbin (7) separates from the auxiliary take-up reroller (27) during return.

The bobbin (7) is the bobbin case (30) of the bobbin (7).
It has a bobbin frame (31) that supports the. This bobbin frame (
3l) can pivot around a fixed mechanical axis (32).

During the transition into the working position, the maintenance device applies an additional load (P) to the bobbin frame (3l), so that the bobbin (7) is pressed with increased force onto the winding roller {6). This suppresses the occurrence of slippage between the take-up roller (6) and the bobbin (7).

In the embodiments described below with reference to FIGS. 4 and 5, the same reference numerals are used for equivalent elements with respect to spinning positions and maintenance equipment. These elements (1) will not be explained again.

In the embodiment according to FIG. 4, the measuring wheel (3
3) relates to the running of the connected thread (29). This measuring wheel (33) is supported to rotate as easily as possible and is designed to be as free from inertia as possible. Measuring wheel (
33) is engaged by the brake lever, which consists of a brake lever pivotable about an axis (35) between the two positions e (34 and 36), which is usually measured It is lifted by a magnet (37) which is in contact with the ring (33) and which is also connected via a line (38) to the control device (24). This play wheel is released at the start of the winding process initiated by the auxiliary winding roller (27), so that the measuring wheel (33) begins to rotate. The measuring wheel (33) is provided with one or several markings (39) and to which a signal sensor (40) is arranged, which sensor can be connected via a line (41) to a control device including a computer. It is connected to (24). Based thereon, the computer calculates the expected point in time at which the intermediately stored yarn length will be drawn out and the run of the combined thread will essentially correspond to the running-compatible thread run. Accordingly, the increased winding speed is reduced with a gentle transition to a winding speed suitable for operation, and the bobbin (7) is moved to the winding roller (6) of the spinning machine.
It will be returned.

In a variant, a measuring wheel (33) is delivered to the bobbin (force) so that it measures the actual winding speed of the bobbin (force).

In the embodiment according to FIG. 5, an auxiliary storage device (44) is installed in front of the intermediate storage device (43). The intermediate accommodation device fi (+3) is connected to the suction air source (F1). This storage device also has a tubular structure that is open towards the yarn running position.

Similarly, the auxiliary storage device (44) also has a tubular structure open towards the yarn running position, which is connected to the suction air source (F2).
It is possible to connect to Splice fitting T! During the thread binding in (9), the intermediate storage device is used! ! ! Only (4 3) works. After the yarn binding is completed, the combined yarn (29
) is pulled out in the winding direction by driving the auxiliary winding roller (27).

The intermediate receiving device l (43) is equipped with a detector (48) that engages the thread 121 (45), which detector is connected to the line (49).
) to the control device (24). Thread ring (
45) reaches a residual value and leaves the range of the detector (48), the control device (24) connects the auxiliary containment device (44) to the suction source (F2). The yarn fed from the feeding device (1) then enters the auxiliary storage device (44) in the direction of the arrow (illustration), where it is held in the form of a ring (51). After (43) is emptied by pulling out in the direction of arrow (G), withdrawal from the auxiliary storage device (44) is started.The auxiliary storage device fil (44) is controlled via the line (57). Device(
at least one detector (54) connected to 24);
Equipped with:

The thread ring (51) is the range of this detector (54)! : Once reached, the computer of the control device (24) calculates the remaining time until the consumption of the intermediately accommodated total length and adjusts the drive (26) of the auxiliary winding roller (27) accordingly, i.e. with a high winding. It is controlled by a gradual reduction from the speed to the hoisting speed suitable for operation.

In the embodiment according to FIG. 5, additionally a second detector (5
6) is detected ``3 (54) [Auxiliary storage device (44)
are installed axially apart. This detector (56)
is also connected to the control device (24) via a line (55). This makes it possible to monitor the withdrawal from the auxiliary storage device (44) at two points in time, ie also to monitor the course of the reduction in the winding speed. Based on the signal of the detector (56) that reacts first, the control device (
24) calculates the remaining time until complete consumption of the intermediately stored yarn length. Based on the signal of the detector (54) which is also sent to the computer, the computer examines whether the intended speed reduction is carried out in the desired manner. If necessary, you can make corrections here.

In a modification of the embodiment according to FIG.
It can be provided that 44) is a component of the spinning machine, ie that it is arranged at each spinning position. In this case, the maintenance device can transfer the force back to the winding roller (6) as soon as the intermediate storage device (43) is emptied, so that the device can be immediately moved to the next location. The withdrawal of the yarn from the device (44) then takes place over a longer period of time at the relevant spinning position itself.

[Brief explanation of the drawing]

FIG. 1 is a schematic representation of the device according to the invention during the operation of joining the previous yarn with the new yarn and during the operation of feeding the intermediate storage device. FIG. 2 is a schematic diagram of the apparatus of the embodiment of FIG. 1 at a later point in time, ie after the thread binding has been carried out and during the winding up of the intermediately stored thread length. FIG. 3 is a schematic illustration of the device according to FIGS. 1 and 2 after the end of the piecing and the intermediate storage device has been emptied; FIG. Fig. 4 is a schematic diagram of a device similar to Figs. 1 to 3 during the thread drawing operation after performing a thread piecing, which is equipped with a transmitting device for detecting the length of the drawn thread or the diameter of the drawn thread; It is a diagram. FIG. 5 is a view of another embodiment of the invention similar to FIG. 1 during emptying of an intermediate storage device with an auxiliary storage device for receiving a loop of thread of a certain length; 1--1 feeding device, 5-11 thread, 6-11 take-up reroller, 7-11 bobbin, 9--splicing device, 17-11 intermediate storage device, 18-11 thread ring, 21 .22--1 detector, 24--1 control device, 27--auxiliary winding roller, 33--1 measuring wheel, 39--marking, 40--1 signal sensor, 43--1 intermediate storage device, 4
4-11 auxiliary storage device, 4 5 -- single thread ring, 48 --
1 detector, 51--1 thread ring, 54, 56--1 detector.

Claims (1)

[Claims] 1. A device for receiving the end of the previous yarn wound onto the bobbin, a device for receiving the new yarn produced by the spinning position, and a device for combining the previous yarn and the new yarn. , a device for intermediately accommodating the yarn length of the new yarn produced during binding;
a device comprising a drive for winding the combined yarn onto a bobbin, the drive being controlled by a control device to increase the speed compared to the operating speed until the intermediately stored yarn length is consumed; In a device for carrying out splicing in the spinning position of a spinning frame maintained at , 39, 40; 48,
54, 56), according to which the hoisting device (27) controls the reduction in speed. 2. The control device (24) includes a computer for calculating the remaining time of yarn consumption, and a transmitting device (21, 22; 33, 39, 40; 48, 54, 56
) are engaged. 3. Device according to claim 1 or 2, characterized in that the transmitting device comprises a device for detecting the length of the thread ring (18) received in the intermediate receiving device (17). 4. A device (21, 22; 48) disposed in the intermediate storage device (17) for detecting a point in time when the stored thread ring (18; 45, 51) exhibits a preset residual value while being discharged.
, 54, 56). The device according to any one of claims 1 to 3, characterized in that the transmitting device includes: 5. An auxiliary storage device (44) for receiving a certain length of yarn is arranged in front of the intermediate storage device (43), and a transmitting device detects when the yarn leaves the intermediate storage device (43) ( 48). Apparatus according to any one of claims 1 to 3, characterized in that it comprises: 48). 6. Device according to any one of claims 1 to 3, characterized in that the transmitting device includes a device (33, 39, 40) for detecting the course of the winding speed after the combination of the previous thread and the new thread. 7. Device according to any one of claims 1 to 3, characterized in that the transmitting device comprises a detection device (33, 39, 40) for the thread length withdrawn from the intermediate storage device (17) after coupling.