JPH03124826A - Method and apparatus for stripping cut yarn end part off from cone bundle end of package - Google Patents

Abstract

PURPOSE: To peel, by a pneumatic pressure, a yarn end part broken from a conical bundle tip of a package in the ring rail region of a fine spinning frame by operating a blow nozzle depending on the position of the conical bundle tip, to automatically remove a yarn breaking and efficiently conducting yarn piecing. CONSTITUTION: In the region of a ring rail 5 of a fine spinning frame, when peeling, by a pneumatic pressure, a yarn end part broken from a conical bundle tip 4 of a package 3 by at least one of yarn end part-blow nozzles 6, a state of the conical bundle tip 4 of the package 3 is detected by a device operated with a sensor, a position of the blow nozzle 6 is controlled by actuating a screw spindle 9 connected to a drive mechanism and arranged upright by the device, and then the air from an air source 15 is blown by passing the blow nozzle 6, and the yarn end part broken from the conical bundle tip 4 of the package is peeled by the pneumatic pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for pneumatically stripping yarn ends from a package cone by means of at least one yarn end-blowing nozzle in the area of a ring rail of a spinning machine. METHODS AND APPARATUS.

It is already known in the art that the positioning of individual working devices necessary for yarn splicing in a yarn splicing device for proper functioning is performed depending on the position of the ring rail. In this case, if necessary, a yarn end blowing nozzle is provided at a position below the ring rail, and from this position the nozzle blows air in the direction of the cone of the pan cage to be processed, removing the yarn end from the package. Peel it off.

However, in reality, the thread splicing device's work is delayed due to repeated thread breaks, for example, and therefore some incorrect working positions are created in the spinning machine without being treated at all. It may happen that it is left unattended.

Moreover, during this time, the ring rail continues to perform the predetermined tip forming operation, that is, the ring rail moves up and down.

Experience has shown that spinning stations that are left untreated make it difficult for the splicing device to carry out the next splicing operation. Since the positioning of the working equipment takes place depending on the position of the ring rail, the light cone formed at this spinning position remains neglected.

This spinning position is sometimes left untreated, resulting in extremely insufficient winding of the spun. In this case, an incorrect splicing operation of the splicing device occurs at a position that is too high above the yarn end-blowout nozzle, while this yarn end-blowout nozzle is too high in the cone in such a poorly wound tip. I don't do blowing when I come to the sun, I go to the tube.

Such drawbacks have not been taken into consideration in conventional techniques. In the prior art, the yarn end blowing nozzle always occupies the same position with respect to the ring rail and the spinning ring and always blows into the same area of the package.

Furthermore, it also belongs to the prior art to provide the yarn end blow-off nozzle so as to move up and down parallel to the spindle rotation axis (German Published Patent Application No. 25 43 7).
However, even with this structure, the same drawbacks as mentioned above arise, and it is therefore impossible for the splicing device to function properly.

The problem underlying the present invention in contrast to the above-mentioned prior art is that the yarn end-blowout nozzle is always located in a position below the ring rail, and from this position the cone of radiation of the package to be treated can be adjusted as desired. A spray stream is blown out to ensure that the thread ends are stripped from the package.
The present invention provides the method and apparatus described above.

The above problem is solved by making the actuation of the nozzle dependent on the position of the light cone. With this configuration, the yarn end-blowout nozzle is always in the correct position,
The advantage is therefore that the efficiency of the splicing device for automatically removing yarn breaks is improved, since it is possible to strip off the yarn ends even when the ring rail has left the winding area of the tip.

According to another embodiment of the invention, the position of the nozzle is changed in relation to the position of the package relative to the cone tip. In this case, in particular, the nozzle is lowered from its starting position.

This downward movement is carried out gradually, for example, until the thread is detected. Also, if a number of nozzles are provided at different heights, these nozzles are activated one after the other, starting from the upper nozzle.

In accordance with another embodiment of the invention, a sensor-actuated device is used which detects the position of the cone tip of the package, with the device controlling the position of a single nozzle or of a number of nozzles. successive operation of the nozzles is induced.

According to a simple embodiment of the invention, a vertically mounted threaded spindle is used which is connected to the drive mechanism, on which the nut holding the nozzle is guided. In this case, the drive mechanism is in particular connected to a control device, which is itself connected to the actuating element for the nozzle and to the thread sensor in the area of the suction cap, which is known per se.

When using a large number of nozzles, these nozzles are arranged one above the other and are connected to a common control device in accordance with another arrangement according to the invention.

In this case, the sensor-operated device has a number of sensors arranged one above the other and is connected via a control device to one or more nozzles.

According to another characteristic of the invention, at least one outlet nozzle is provided above the ring rail, which is oriented towards the upper end region of the tube. The spray streams of these outlet nozzles support the thread end - the spray stream which is still weak in this position of the outlet nozzle and further transports the thread loop present around the end region of the tube into the active area of the suction cap. .

The invention will now be described in detail with reference to the embodiments illustrated in the accompanying drawings.

As shown in FIG. 1, a large number of tubes 2 are provided on a spindle rail 1 of a ring spinning machine and are inserted into the spindle, and packages 3 are present on these tubes 2. These packages are each formed with a conical tip 4 in the upper region, ie in the region of the ring rail 5 2 . A spray stream B from a yarn end-blowing nozzle 6 acts on this conical ball tip 4 of the package 3. This action takes place in particular when a thread breakage occurs and the thread end must be stripped off from the conical tip 4.

The nozzle 6 is installed on the spindle 9
fixed on top. This screw spindle 9 is the drive mechanism 1
It is combined with 1. This nozzle 6 is connected via its own valve 24 to an air source 15 . This valve 24 is the actuating element 1
Controlled by 3.

Above the package 3, a suction camp 19, also known per se, is provided with a thread sensor 14 known per se. The thread sensor 14, the actuating element 13 as well as the drive mechanism 11 for the ratchet spindle 9 are connected to the control device 12 via conductors 16, 17 and 18, respectively. In this case, the starting command for this control device 12 is given via a line 18 from the thread sensor 14 of the suction cap 19, and the control device 12 itself is supplied via lines 16 and 17 to the drive mechanism 11 of the screw spindle 9 and Controls the actuating element 13 for supplying air to the yarn end-blowing nozzle 6. The control device 12 controls the blow-off nozzle 6 depending on the height position of the ring rail 5 given from the machine control unit via the input 25, and causes the blow-off nozzle to start blowing. At all times, the conical tip is located just below the position it would occupy under normal circumstances. The valve is then operated to begin spraying the spray stream B. Drive mechanism 1
1 operates and the threaded spindle 9 rotates,
The blowing nozzle 6 is lowered from its starting position until the yarn sensor 14 senses a yarn.

Alternatively, it is also possible to gradually lower the blowing nozzle until a thread is detected.

In the embodiment according to FIG. 2, a large number of blowing nozzles 6
．． 6', 6' are provided at different heights and these blowing nozzles are activated sequentially starting from the upper nozzle. Each of these blow-off nozzles 6.6', 6'' is connected to a corresponding valve and actuating element 13.13', 13'', which itself is connected via a line 17.17', 17' to a control device! It is connected to 2'. Also in this case, the yarn sensor 14 of the suction cap 19 and the control device 12 described above
The necessary operational connections between the two are made via conductors 18. Three blowout nozzles 6 provided above and below each other
．． 6'6'' is connected to an air source 15 via a suitable conduit.

The blowing nozzles 6.6', 6# follow the movement of the ring rail 5 by means of a device not shown in detail, so that the uppermost blowing nozzle 6 always follows the movement of the conical ball tip 4 in a predetermined position. It is located in a position where it can provide the optimum spray flow. Here, the thread sensor 1 is detected within the time period after the start of the injection of the spray stream B from the blow-off nozzle 6.
4 does not sense a thread, the control device 12' closes this blow nozzle 6 and opens the blow nozzle 6'. The control device is equipped with a time element for this purpose. If the yarn sensor 14 does not detect any yarn in the tube connected to the suction cap 19 within the time period after the start of the injection of the spray stream B from the blow-off nozzle 6', the control device 12 ′
closes the blowout nozzle 6' and opens the blowout nozzle 6#.

Here, even if no yarn is detected after a predetermined period of time, the operation is started from a working state in which no yarn end is found.

According to the embodiment of FIG. 3, it is also possible to use a sensor-operated device 8 with three sensors 7.7 and 7#. The device 8 actuated by this sensor is connected via a line 20 to a control device 12'', which itself is connected via a line 16 to a control device 12'', similar to the embodiment according to FIG. It is connected via a line 17 to a drive mechanism 11 for controlling the air of the air source I5 and to an actuating element 13 for controlling the air of the air source I5.The sensors 7.7' and 7''
detects the state of the conical ball tip 4 and accordingly controls the blowing nozzle 6.
control the height position of the This blowing nozzle is the drive mechanism 1
1, the nut 10 and the threaded spindle 9Gζ can change its height position.

Instead of using only one blowout nozzle 6 according to the embodiment of FIG. 3, a sensor-actuated device 8 is used, which is similar to the structure according to the embodiment of FIG. .6', 6'' via a control device 12', which makes it possible to operate these blowing nozzles with correct function depending on the state of the conical ball point 4.

4 and 5 show other configurations according to the invention.

As is known, the air velocity of the spray stream and its intensity decrease with increasing distance from the nozzle outlet, although in the present invention the spinning ring 23 through which the spray stream has to pass also reduces the air velocity and its intensity. Since the spray flow effect is reduced, the thread ends that are stripped off from the conical tip 4 in the far lower region of the spinning ring are not necessarily transferred reliably to the suction cap 19.

In order to ensure this transfer, according to the invention the spinning ring 2
An additional blowing nozzle 22 is provided above 3. This additional blowing nozzle 22 is the blowing nozzle 6.6
One of the thread ends '6' captures the thread end which is torn off and feeds this thread end further into the active area of the suction cap 19.

This additional blow-off nozzle 22 has thread loops that sometimes wrap around the upper region of the tube 22 and prevent the capture of the thread ends.
is blown out and guided into the active area of the suction cap 19.

Working blowing nozzle 6.6' or 6'' spinning ring 23
This additional blowing nozzle 22 is particularly effective if the action of these spray streams has already weakened significantly in the area of the spinning ring 23.

Moreover, the provision of this additional blowing nozzle is particularly useful when there is a significantly large distance between the conical tip 4 and the upper end of the tube 2, i.e. when the conical tip 4 is still in the lower region of the tube at the start of doffing. It is advantageous whether or not the blowing nozzle is provided in a height-adjustable or staggered manner, even if very long tubes are used. It has thus been found that, in the working conditions described above, if an additional nozzle were not provided, the stripped thread end would become entangled in the upper region of the tube and would not reach the suction cap 19.

The action of the additional blowing nozzle 22 is assisted and multiplied by the air guide vi21 by means of a further configuration according to the invention. The additional blowing nozzle 22 is the blowing nozzle 6.6'
, 6' or at the same time as one of the blow-off nozzles, or with a step difference in time for each blow-out nozzle. The spray stream of this additional outlet nozzle 22 is oriented at an acute angle to the axial direction of the tube 2, like one of the outlet nozzles 6.6', 6''.

[Brief explanation of the drawing]

1 to 4 are schematic side views of different embodiments of the present invention, and FIG. 5 is a partially cutaway plan view of the embodiment according to FIG. 4. The symbols in the diagram are: ■...Spindle rail, 2...Tube, 3...
・Package, 4...Conical ball tip, 5...Ring rail, 6.6', 6'...Blowout nozzle, 7.7', 7
'...Sensor, 9...Screw spindle, 10...
・Nut, 11... Drive mechanism, 12.12' 1
2" control device, 13.13'13"... operating element, 14... yarn sensor, 15... air source, 19...
・Suction cap, 22-・Additional blowout nozzle,
23... Spinning ring, B... Spray flow.

Claims (1)

[Claims] 1. A method of pneumatically stripping a broken yarn end from a conical ball tip of a package using at least one yarn end blowing nozzle in the area of a ring rail of a spinning machine, comprising:
The operation of the nozzles (6, 6', 6'') is performed depending on the state of the conical ball tip (4), and the broken yarn end is peeled off from the conical ball tip of the package by pneumatic pressure. 2. The method according to claim 1, characterized in that the position of the nozzle (6) is changed with respect to the position of the conical tip (4) of the package (3). 3. Lowering the nozzle (6) from its starting position. 3. Method according to claim 2. 4. Method according to claim 3, characterized in that the nozzle (6) is gradually lowered until the thread is detected. 5. A number of nozzles (6, 6', 6") are placed at different heights. 2. A method as claimed in claim 1, in which the nozzles are operated one after the other, starting from above. 6. A sensor-actuated device (8) detects the state of the conical tip (4) of the package (3) and controls the position of a single nozzle (6) or multiple nozzles (6). , 6', 6"). 7. In the area of the ring rail of the spinning machine, at least one yarn end-blowing nozzle is used to blow the cone of the package. In a device that uses pneumatic pressure to peel off the broken yarn end from the ball tip,
A spinning machine as described above, comprising a vertically arranged threaded spindle (9) connected to a drive mechanism, on which a nut (10) holding a nozzle (6) is guided. device for pneumatically stripping the broken yarn end from the conical tip of the package by means of at least one yarn end-blowing nozzle in the area of the ring rail of the package. 8. A drive mechanism (11) is connected to a control device (12) which itself has an actuating element (1) for the nozzle (6).
3) and a thread sensor (14) in the area of a suction cap (19) known per se. 9. A number of nozzles (6, 6', 6'') are provided above and below and are combined with a common control device (12');
8. The device according to claim 7. 10. A sensor-operated device (8) is equipped with a number of sensors (7, 7', 7") arranged above and below, and one or a number of nozzles (7") are controlled via a control device (12"). 11. The device according to claim 7, wherein the thread end is connected to a ring rail (6, 6', 6'') of the spinning machine.11. In a device for pneumatically stripping lint using a blow-off nozzle, the yarn end - the blow-off nozzle (22) directs the package (3) towards the upper end of the tube (2) carrying this package (3). 3) A device for stripping lint, characterized in that it is oriented at an acute angle to the axis of lint.