JPS6361257B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a winding device for spun yarn, which comprises a yarn tensioning device and a yarn cleaner connected downstream thereof for monitoring the yarn.

Known yarn suction nozzles loaded with negative pressure are arranged close to the yarn path and at a point behind the yarn cleaner in the direction of yarn travel, ie between the yarn cleaner and the winding bobbin. ing.

The role of the yarn suction nozzle is as follows.

(1) When thread breakage occurs between the thread tension device and the winding bobbin, grab the lower thread.

(2) When the lower thread bobbin is not completely emptied and the payout bobbin is replaced, the remaining thread that was cut off before the bobbin is dropped is sucked in.

(3) Any thread that breaks between the thread guide drum and the winding bobbin is always immediately pulled out of the dangerous area in the area of the thread guide drum by the negative pressure generated at the opening of the thread suction nozzle. This eliminates entanglement with the winding drum or yarn guide drum that drives the winding bobbin.

In the known device, when thread breakage occurs between the thread tensioning device and the take-up bobbin, the lower thread that is caught by the thread suction nozzle is moved into the thread suction nozzle when the outflow resistance of the unwinding bobbin is small. is rapidly absorbed. In this case, the yarn suction nozzle is located behind the yarn cleaner as seen in the yarn running direction, which has the disadvantage that a yarn running signal is generated in the yarn cleaner, which not only monitors and knots the yarn but also monitors the yarn running. There is.

The object of the invention is to ensure that no yarn running signals are generated in the yarn cleaner after a yarn breakage, and that no yarn loops are sucked into the yarn suction nozzle when the winding device is restarted. In order to solve such problems, in the present invention, a yarn suction nozzle is arranged near the yarn travel path between the yarn tensioning device and the yarn cleaner, and this yarn suction nozzle
During the winding operation, it is always located in the active position loaded with negative pressure, and does not function during bobbin replacement of the winding bobbin or the unwinding bobbin, or during the tying process and subsequent restart of the winding device. It has a switching means that can be switched to a non-operating position in which no power is exerted.

With the device of the present invention, when a yarn breakage occurs downstream of the yarn suction nozzle, the cut-off yarn end is sucked in, and the yarn end continuing on the winding bobbin side is wound on the winding bobbin. At the latest at the moment of yarn breakage, the yarn travel signal is interrupted and the yarn cleaner, which monitors the yarn travel, also stops the winding device.

Whenever the yarn breaks at a completely unreasonable point, the yarn running signal is immediately interrupted and the winding device is shut down. In this case, the thread rarely falls, and any trouble in the winding device is immediately recognized.
Removed immediately.

Conventionally, it has not been possible to switch the yarn suction nozzle between an active position and a non-active position. However, since there is always a negative pressure in the nozzle opening, it occurs that the thread loop is sucked into the thread suction nozzle when the winding device is started again after the thread breakage has been removed. This also occurs when replacing the winding bobbin. If this thread loop does not unwind on its own, the thread loop will wind onto the take-up bobbin and the quality of the wound thread will be poor. In order to eliminate this drawback, according to the invention it is provided that the yarn suction nozzle can be switched between an active position and a non-active position.

The thread suction nozzle is currently being replaced with the winding bobbin.
It temporarily loses its effectiveness while replacing the feeding bobbin or when restarting after removing a broken thread. According to another embodiment of the invention, the yarn suction nozzle advantageously has a flow medium cutoff device. This device may be, for example, a flap, a valve or the like. Alternatively or additionally, the yarn suction nozzle is mounted such that it can be moved away from the yarn path.

In a further embodiment of the invention, the thread suction nozzle is switched into an active and a non-active position by means of a movable operating device, for example a wall-mounted thread tying device. Moreover, the movable operating device is designed as a winding bobbin changing device. As long as the operating device, which can be moved along the winding device, is held and operated, the yarn suction nozzle is in a non-active position.

For retying after yarn breakage, the lower yarn sucked into the yarn suction nozzle is received by the underside of the yarn tensioning device. In this case, according to another advantageous embodiment of the invention, a thread tensioning device is provided to ensure that the thread end received again has a defined length calculated from the thread receiving point. A controllable cutting device is arranged between the yarn suction nozzle and the yarn suction nozzle. This cutting device is operated as soon as the lower thread is received again. If the tying process is carried out automatically, for example by means of a tying device, the operation of the cutting device is of course also carried out automatically. After cutting by the thread cutting device, the cut-off thread end of the lower thread is sucked into the thread suction nozzle.

The advantages of the invention are as follows.

When a yarn break occurs between the yarn suction nozzle and the winding bobbin, the lower yarn is sucked in and gripped by the yarn suction nozzle. The yarn end located downstream is sucked back to the cutting point. At the latest, at the moment when the yarn end is sucked back and sucked into the yarn suction nozzle, the yarn cleaner interrupts the winding device due to the absence of the yarn travel signal. The gripped lower thread is under tension the entire time. In this case, thread binding, loop formations, double threads or the like are excluded.

In the event of yarn breakage or yarn cutting upstream of the yarn suction nozzle, the upper yarn is gripped and held under tension by the yarn suction nozzle. The upper thread is therefore wound up still under tension up to the final end section.

During a bobbin change of the take-up or pay-off bobbin, or during the tying process and the subsequent restart of the winding device, the yarn suction nozzle is inoperative and therefore the yarn is not under much tension.
No loop formation occurs due to suction.

When the yarn coming from the unwinding bobbin is empty, the yarn running signal is interrupted and the winding device stops operating. The cutting device is also operated automatically to stop the operation, so that thread running is interrupted in any case.

The invention will be explained below with reference to the exemplary embodiments shown.

By winding device according to the invention is meant a functional winding unit. In this case, the winding unit is constructed as a working unit of a large machine. This working unit is part of a special spinning machine. In the case of a spinning machine, the lower yarn is not fed from the unwinding bobbin, but from the spinning frame.

The tensioning disc 12 of the thread tensioning device 13 is attached to the plate 11.
is fixed. A tensioning shoe 14 of the thread tensioning device 13 is movably supported by a lever 15. A thread cutting member 16 is provided above the thread tensioning device 13. Furthermore, a thread cleaner 17 is fixed to the plate 11. The thread cleaner 17 removes thread 1
In addition to monitoring the thin and thick portions of 8, thread running is also generally monitored. The thread cleaner picks up the thread running signal while the thread is running, whereas the running signal is interrupted when the thread is stationary. The thread cleaner 17 has a controllable cutter 2
A thread cutting device 19 consisting of an anvil 21 and an anvil 21 is also provided.

When the thread running signal is interrupted or a thin or thick spot occurs, the thread cleaner 17 automatically operates the cutter 20, and the blade of the cutter 20 presses the thread 18 against the anvil 21 to cut the thread. .

A support 22 is fixed to the plate 11 below the tension disk 12. Swivel tube 23 on support stand 22
is supported, and a yarn suction nozzle 24 is attached to the end of the swirl tube. A pivot tube 23 is pivotable in the direction of arrow 25 and in the opposite direction. A suction conduit 26 opens at the bottom of the support base 22, and the support base connects the suction conduit 26 and the swirl pipe 23. Suction conduit 26
is permanently connected to a central suction air device, not shown.

A support tube 27 is shown above the thread cleaner 17, which is connected in a manner not shown to the machine frame and supports a thread guide plate 28. A shaft 29 is rotatably supported at the left end of the support tube 27. A lever 30 is fixed to the shaft 29. Lever 30 engages one end of a two-armed lever 31, which lever 31 is pivoted by lever 30 in the direction of arrow 32 and in the opposite direction. The other end of the two-armed lever 31 is hinged to a tongue piece 34 fixed to the pivot tube 23 via a rod 33.

The thread 18 comes from the pay-off bobbin 35, passes through an open controllable residual thread cutter 36, passes through a thread guide plate 37 and a rake-like contact device 38, then passes through a thread tensioning device and passes through an opened thread cutting member. 16
, past the yarn suction nozzle 24 , guided through the yarn cleaner 17 , and further behind the yarn guide plate 28 , a rotating yarn guide roller 40 .
The thread is guided through the thread guide groove 39 and wound onto the winding bobbin 41. The sleeve 42 of the winding bobbin 41 is held by a pivotable, fork-shaped bobbin holder 43. The winding bobbin 41 itself rests on a thread guide drum 40 and is frictionally driven by this drum.

Both tooth rows 44, 45 of the rake-like contact device 38
are placed under slight pressure against the taut thread and will interlock with each other as soon as the thread tension is removed. This causes the rake-like contact device 38 to:
It is possible to grasp threads that are not under tension.

Since the yarn suction nozzle 24 is located near the yarn travel path, the yarn is sucked in by the yarn suction nozzle 24 even in the event of yarn breakage. For this purpose, the yarn suction nozzle is always loaded with negative pressure. Due to the yarn breakage, the yarn running signal is interrupted, so that the yarn cleaner 17 generates an interruption signal and stops the winding device, in which case the yarn cutting member 1
6 and 19 are also operated. The thread coming from the pay-off bobbin 35 is gripped by a rake-like contact device 38. The end cut by the thread cutting member 16 is sucked in, and the end of the upper thread is taken up by the winding bobbin 41.
It is wound up.

During the tying process, the turning tube 23 turns in the direction of the arrow 25, thereby operating the lever 30, which is a switching means. The lever 30 can be actuated by hand or by means of an operating device, for example a tying device (not shown). When lever 30 pivots in the direction of arrow 46, 2
The arm-like lever 31 is pivoted in the direction of the arrow 32, thereby pulling the rod 33 in the direction of the arrow 47 and pivoting the swivel tube 23 in the direction of the arrow 48, so that the end of the swivel tube is The installed yarn suction nozzle 24 is switched to a non-active position. Only after tying the thread and after starting the winding device, the swirl tube 2
3 is brought into the starting position, so that the thread suction nozzle 24 is switched into the working position and is fully functional again. The rotating tube 23 is also rotated when the winding bobbin is replaced with a new one.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of the winding device, FIG. 2 is a side view of the winding device, and FIG. 3 is a partial view of the winding device viewed from above. 11...Plate, 12...Tension disc, 13...
... Thread tension device, 14 ... Tension shoe, 15 ... Lever, 16 ... Thread cutting member, 17 ... Thread cleaner, 18 ... Thread, 19 ... Thread cutting device, 20 ...
Katsuta, 21... Anvil, 22... Support stand, 23...
...Swivel tube, 24...Yarn suction nozzle, 25...Arrow, 26...Suction conduit, 27...Support pipe, 28
... Thread guide plate, 29 ... Shaft, 30, 31 ... Lever, 32 ... Arrow, 33 ... Rod, 34 ... Tongue piece, 35 ... Payout bobbin, 36 ... Remaining thread cutter, 37 ... Thread guide plate, 38... rake-like contact device, 39... thread guide groove, 40... thread guide drum, 41... winding bobbin, 42... sleeve,
43...Bobbin holder, 44, 45...Tooth row, 4
6, 47, 48...arrow.

Claims (1)

[Scope of Claims] 1. A winding device for spun yarn comprising a yarn tensioning device and a yarn cleaner connected to the latter and monitoring the yarn, in which the yarn tensioning device 13 and the yarn cleaner 17 are provided.
A yarn suction nozzle 24 is arranged near the yarn travel path between A spun yarn characterized by having a switching means that can be switched to a non-operating position in which no function is exerted during bobbin replacement of a take-up bobbin or a pay-out bobbin, or during a tying process and subsequent restart of a winding device. winding device. 2. The spun yarn winding device according to claim 1, wherein the yarn suction nozzle 24 has a fluid medium cutoff device. 3. The spun yarn winding device according to claim 1, wherein the yarn suction nozzle 24 is supported so as to be movable in a direction away from the yarn travel path. 4. The spun yarn winding device according to claim 1, wherein the yarn suction nozzle 24 is switched between an operating position and a non-operating position by an operating device. 5. The spun yarn winding device according to claim 1, wherein a controllable cutting member 16 is arranged between the yarn tensioning device 13 and the yarn suction nozzle 24.