JP2792336B2 - Automatic winder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic winder.

[0002]

2. Description of the Related Art In an automatic winder in which a plurality of winding units are arranged side by side, a type in which each winding unit has an automatic yarn splicing device is widespread.

[0003] In this type of automatic winder, a yarn pulled out from a bobbin supplied to each unit at a high speed is wound on a rotating package in contact with a rotating drum. If the yarn pulled out from the bobbin has a defect such as a slab, it is detected by a yarn clearer near the yarn joining device, and when the drum is stopped, the yarn is forcibly cut by a cutter built in the yarn clearer. Then, the defective portion is removed, and then the upper thread on the package side and the lower thread on the yarn supplying bobbin are spliced to resume winding.

[0004]

However, in the above-described conventional automatic winder, when a bobbin of a different number is erroneously taken into the winding unit and winding is started, the yarn to be wound becomes a different number in the middle. However, even if the clearer detects that the difference number has been detected, it is not possible to remove all the odd-numbered portions. This is because the package is rotating at a high speed by the drum, and when a different-numbered portion is detected by the clearer and the drum is stopped, several different-numbered yarns have already been wound into the package. is there.

The present invention has been made in view of the above circumstances, and provides an automatic winder capable of removing all of a different-numbered yarn when a different-numbered yarn is mixed during winding of a predetermined-numbered yarn. With the goal.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to an automatic winder which winds a yarn around a package while rotating the package by contacting the package with a rotating drum. Detects the yarn count of the wound yarn,
When a different-number yarn is detected, the rotating drum is rotated in the reverse direction to suck the different-number portion into the suction means.

The amount of reverse rotation of the drum can be calculated back from the amount of yarn travel detected by a clearer or the like during winding. As the suction means, for example, a yarn trap provided for holding a yarn end at the time of piecing can be used.

[0008]

According to the above technical means, by rotating the rotating drum in the reverse direction, a yarn of a different number can be pulled out of the package and all of the yarn can be sucked into a suction means such as a yarn trap. By operating the cutter of the yarn clearer in this state, it is possible to remove all the mixed yarn of different number.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a winding unit. A plurality of winding units 1 are provided between a bobbin supplying conveyor belt 16 and an empty bobbin conveying belt 17 along the conveying direction to form one automatic unit. A winder is configured. In each winding unit 1, the yarn Y drawn from the bobbin 5 on the tray 7 as the bobbin transport medium passes through the balloon breaker 8, the yarn guide 9, the tensor 10, and the yarn clearer 11, and the traverse as a rotating drum. It is wound around a package 6 which is rotated by a drum 12. When a yarn defect in the yarn is detected by the yarn clearer 11 during this yarn winding, the yarn clearer 1
The cutter incorporated in 1 operates to forcibly cut the traveling yarn Y. At this time, the rotation of the traverse drum 12 is stopped and the winding is stopped, while the suction mouse 13 is stopped.
Operates to guide the upper thread of the package 6 to the yarn joining device 14, and the relay pipe 15 transfers the lower thread of the bobbin 5 to the yarn joining device 14.
Lead to. Then, the yarn is spliced by the yarn splicing device 14, and if the yarn splicing is successful, winding is started again. In the vicinity of the lower part of the yarn clearer 11, the yarn
A yarn trap 3 for sucking and holding the lower thread end cut by the cutter of the clearer 11 is provided. And
When one bobbin 5 is emptied, a notting command is issued, and the bobbin change mechanism 20 activates the empty bobbin to the empty bobbin transport belt 17 and the next bobbin 5 from the bobbin supply conveyor belt 16 to the unit 1. Is taken into the winding position 21 and the yarn is pulled out from the bobbin 5 and spliced, and then winding is resumed.

The above is the basic operation for winding and piecing in this automatic winder.

The winding unit 1 has a function of stopping the winding and automatically removing the odd-numbered bobbin when the winding is started by mistakenly taking in a different-numbered bobbin. For this purpose, the yarn clearer 11 outputs a yarn detection signal a corresponding to the properties of the passing yarn,
A drum sensor 22 provided on the traverse drum 12 outputs a drum rotation detection signal b at a pulse interval corresponding to the drum rotation amount. These detection signals a and b are guided to a central control device 23 provided in the automatic winder and processed. The central controller 23 controls the operation of the yarn clearer 11, the traverse drum 12, the yarn joining device 14, the bobbin change mechanism 20, and the like based on the signal processing result. The dashed line in FIG. 1 shows signal lines for controlling these operations.

The operation of removing the odd-numbered portion will be described below with reference to the flow chart of FIG.

When winding is started with a bobbin of a different number taken in, the yarn clearer 11 starts transmitting a yarn defect detection signal continuously since the properties of the running yarn change from the middle. When this state continues for a predetermined time (for example, one second), the central control unit 23 determines that mixing of different-number yarn has occurred (step 1), immediately stops the rotation of the traverse drum 12 (step 4), and After the cutting operation is prohibited (step 5), the traverse drum 12 is started to rotate in the direction opposite to the winding side (step 6). The reverse rotation of the traversing drum 12 causes the package 6 to rotate in the reverse direction, and the yarn of a different number that has been wound up is fed out, so that the yarn between the traversing drum 12 and the bobbin 5 becomes slack. . At this time, since the yarn trap 3 is driven by suction, the slack portion of the yarn is naturally sucked by the yarn trap 3 as shown in FIG. 3 (step 7). The central controller 23 detects the length of the different-numbered yarn that has passed through the yarn clearer 11 until the drum stops (step 4) based on the yarn traveling signal of the yarn clearer 11 (step 2). Data is stored in its own memory (step 3),
The amount of reverse rotation of the traverse drum 12 is monitored, and the traverse drum 12 is rotated in the reverse direction (step 8) until the thread corresponding to the stored length is unwound from the package 6, and the traverse drum 12 is stopped (step 8). 9). And Yarn Clearer 1
After releasing the prohibition of step 1 (step 10), the cutter of the yarn clearer 11 is operated to cut the yarn (step 11). Since all of the different-numbered yarns wound up in the package 6 are fed out and sucked into the yarn trap 3, all the mixed-numbered yarns are cut by the yarn cutting (step 11). Removed. Next, the central controller 23 determines whether or not the different-number bobbin is to be collected on the spot by the operator (YES) or not (NO) (step 12). This determination is made in accordance with conditions preset by the operator. When waiting for collection by the operator, the yellow button provided on the front surface of the unit 1 is projected to indicate that the yarn splicing is impossible (step 13), and the collection by the operator is waited. When the forced exclusion is executed without executing the command, a notting command is issued (step 14), and the bobbin change mechanism 20 is executed.
To move the different-number bobbin to the empty bobbin transport belt 17.
(Step 15). Empty bobbin conveyor belt 1
The odd-numbered bobbin discharged to 7 is sent to a bobbin collecting mechanism (not shown) and collected (steps 16 and 17).

[0015]

In summary, according to the automatic winder of the present invention, in the case where a bobbin of a different number is mistakenly taken in and winding is started, the yarn of a different number is removed from the package by rotating the rotary drum in the reverse direction. Since all the yarns are drawn out and sucked into the suction means, if the yarn cutting process is performed with a yarn clearer or the like in this state, all the mixed-number yarns can be removed.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a winding unit showing one embodiment of the present invention.

FIG. 2 is a flowchart showing one embodiment of the present invention.

FIG. 3 is a conceptual diagram showing a manner in which a different-number yarn is sucked into suction means by the method of the present invention.

[Explanation of symbols]

 Reference Signs List 3 yarn trap (suction means) 6 package 12 traverse drum Y thread

Claims (1)

(57) [Claims] 1. An automatic winder for winding a yarn around a package while rotating the package by contacting the rotating drum and detecting a yarn count wound on the package, and detecting a yarn having a different number of yarns. An automatic winder characterized in that upon detection, the rotating drum is rotated in the reverse direction to suck a different-numbered portion into the suction means.