JPS606271B2 - Yarn cutting and suction processing method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in a yarn cutting and suction processing method and device used for thread cutting and threading operations of running yarn in the manufacturing process of synthetic fiber yarn, etc. The present invention provides a cutting and suction processing method and apparatus suitable for automatically processing yarn.

In recent years, the textile industry has been actively automating and labor-saving machinery in various processes, and is trying to break away from the labor-intensive industry of which it is a traditional industry.

As part of this effort, in the spinning and winding process, we have developed automatic winding machines that can automatically start and stop, and automatic doffers that doff the fully wound package and automatically replace it with an empty bobbin. has been done. However, in order to fully utilize the effects of the automatic winding machine, automatic doffer, etc., it is necessary to automatically mechanize the thread processing roller group in the thread removal and winding process, the thread threading work on the thread winding body, etc. is necessary. Furthermore, the speed of thread processing in the thread manufacturing process has increased significantly in recent years, sometimes reaching 3,000 to 5,000/min.

However, a predetermined tension is usually applied to the yarn in the yarn direction for purposes such as regulating the shape of the yarn package and preventing arm yarns from being wound around the processed lo-fu. Therefore, conventionally known techniques such as Japanese Patent Publication No. 51-4617
In the method described in No. 6, which consists of a collecting guide, a suction device, and a cutting device, and in which the thread is collected and cut using the collecting guide, suction errors often occur due to the high speed and the tension of the thread. However, problems still remain. As a solution to this problem, it is somewhat effective to increase the total pressure of compressed air supply to increase the suction power of the thread suction device or to increase the sharpness of the thread cutter, but this increases maintenance costs and the New development is required. Particularly when this thread cutting and suction processing is linked with the above-mentioned autodoffer or the like to save labor, the invention of a reliable thread processing method is essential to achieving the desired purpose. The present invention has been newly developed in view of the current situation, and provides a reliable yarn cutting and suction processing method and apparatus.

That is, in the present invention, when the running yarn is cut and suctioned, resistance is applied to the running yarn by a resistance imparting body that imparts resistance to the running yarn, and the resistance is applied to the running yarn upstream of the resistance imparting body. The present invention is characterized in that the tension is lowered, and the yarn is subjected to suction treatment in the tension lowering section.

Hereinafter, details of the present invention will be explained with reference to the drawings.

FIG. 1 is an explanatory view showing an embodiment in which the present invention is applied to winding of grade yarn. In FIG.
After passing through the traverse fulcrum guide 5 and being swung by a traverse device 6, it is wound onto a winding body 8 driven by a friction roller 7. Here, reference numeral 9 indicates a yarn cutting and suction processing device. 2 and 3 are a schematic side view and a front view, respectively, showing the yarn cutting and suction processing device 9 in FIG. The line suction odor 9' consists of a mouthpiece 11 attached to the tip of the suction tube 10, a nozzle part 12 at the rear end, a compressed air supply nozzle 13 connected to the nozzle part 12, and a waste thread nozzle 14. Hoses 15 and 16 are connected to each other, and the hoses 15 and 16 are connected to a compressed air source and a waste yarn box (not shown), respectively. 17 is a thread suction device fixed to the lower part of the thread suction device 9';
As shown in the figure, it consists of a box-shaped support 18 having a guide slit 17' at the tip, a thread cutting blade 19, and a drive unit 20 (for example, a magnet, a fluid pressure cylinder, etc.) that operates the thread cutting blade 19. The thread cutting blade 19 is the mouthpiece 1
It is installed directly below 1.

21 is a yarn resistance imparting guide fixed to the lower part of the thread cutter 17, and the slit 2 has a tapered introduction part 22 at the tip.
3 is formed, and a resistance imparting body 24 is provided at the rear end of this slit 23 to project downward.

These integrated thread suction device 9' and thread cutter 17
The resistance imparting guide 21 is supported by a holding frame 25 to which the thread cutter 17 is attached, and the holding frame 25 is further fixed to a frame 26 of an automatic working machine (not shown) which can be moved along the machine base. It is connected to the fluid pressure cylinder 27 and is arranged to be movable back and forth (it goes without saying that the holding frame 25 can be slidably supported by a frame or the like). Next, the operation of the present invention will be explained.

In order to cut the yarn Y that has been taken up as described above and perform the suction process, first, when the package wound on the winding body 8 is fully wound, an automatic work machine is set to a predetermined position to change the yarn. position and is positioned, then the hydraulic cylinder 2
7 is activated, and the holding frame 25 protrudes. In this case, the tip of the mouthpiece 11 of the yarn suction device 9' and the resistance imparting body 24
are located on a substantially straight line, and the thread cutting blades 19 are arranged so as to intersect between them, and the resistance imparting body 24 is positioned in the direction toward the running thread Y by the protrusion of the holding frame 25. (The holding frame 25 may be movable in the left-right direction for positioning.) As the holding frame 25 moves forward, the resistance imparting guide 21 approaches the yarn Y, and the slit 23 connects to the yarn through the tapered introducing portion 22. The position of the thread Y is reliably approached, and the resistance imparting body 24 at the rear end of the slit 23 comes into contact with the thread Y. Then, as shown in Figure 2, the thread guide is
The position R' shown by the broken line is changed to the position R shown by the solid line, and resistance is applied to the yarn Y. Further, at the same time as the slit 23 approaches the yarn Y, the guide slit 17 of the thread cutter 17 also approaches and restricts the yarn Y. For this purpose, the processing roller 4 and the traversing fulcrum guide 5
The yarn tension between the processing roller 4 and the resistance imparting body 24, especially the
The thread tension T (indicated by the arrow in FIG. 2) between the threads is reduced by contact with the resistance imparting body 24, and the thread ends cut by the thread cutter 17 are more likely to be sucked into the mouthpiece 11. .

Therefore, after the resistance imparting body 24 comes into contact with the yarn Y, for example, if a timer or a limit switch is operated in conjunction with the fluid pressure cylinder 27, and the thread cutting blade is operated by the drive unit 20 of the thread cutter, the thread At the same time as the thread tension T decreases, the thread Y is cut and is instantly sucked into the mouthpiece 11 of the thread suction device 9'.

In this case, even if the yarn tension T decreases due to contact with the resistance imparting body 24 and may be momentarily relaxed, if the yarn suction device 9' is activated in advance, it will be adjusted by the suction force acting on it. A reliable and stable yarn suction operation can be performed without the yarn Y being wrapped around the processing roller 4 or the like. In this embodiment, the resistance imparting body is fixed to the resistance imparting guide, but the resistance imparting body may be moved independently. Further, the shape of the resistance imparting body is not limited to the shape of this embodiment, and may be a hook shape or a shape that sandwiches the yarn, and its operation may be other than the method of pressing the yarn as in this embodiment. Alternatively, it may be something that pulls the yarn together or something that pinches it. That is, any device can be used as long as it is located downstream of the yarn suction device or the yarn cutter and can provide resistance to the yarn, and all of them fall within the scope of the present invention. or,
In this embodiment, the yarn suction odor, thread cutter, and resistance imparting body are arranged in the yarn running direction in this order; However, it goes without saying that it has the same effect as the example.

Further, in this embodiment, the yarn suction and cutting device is installed in an automatic working machine, but it goes without saying that it may be installed in the spinning machine frame.

As described in detail above, the present invention applies resistance to the yarn when cutting and suctioning the running yarn to reduce the tension of the yarn, thereby ensuring reliable cutting and suctioning. can be achieved, and the effect of solving the problems of the conventional technology is great.

In particular, when the yarn processing speed is 3000 min or more, the effect is remarkable compared to the conventional technology, and the effect in terms of labor saving when operating with an automatic actuator is also large. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram showing an embodiment of the present invention, and FIGS. 2 and 3 are a schematic side view and front view of the yarn cutting and suction device shown in FIG. 1.

9' is a thread suction device, 17 is a thread cutter, 24 is a resistance imparting body,
25 is a holding frame, and 27 is a fluid pressure cylinder.

fire 7 figure Next 2 figures force figure

Claims (1)

[Scope of Claims] 1. When cutting and suctioning a running yarn, a resistance imparting body that imparts resistance to the running yarn imparts resistance to the running yarn, and the running yarn on the upstream side of the resistance imparting body is 1. A method for cutting and suctioning a yarn, the method comprising reducing the tension acting on the yarn and suctioning the traveling yarn in the tension reducing section. 2. A method for cutting and suctioning yarns according to claim 1, characterized in that cutting is performed after suctioning. 3 Consists of a yarn suction device that suctions the yarn, a yarn cutter that cuts the yarn, and a resistance imparting body that provides resistance to the yarn, and the yarn suction device is located downstream of the yarn suction device in the yarn running direction. A yarn cutting and suction processing device characterized in that a cutting device and a resistance imparting body are arranged, and the yarn suction device, the yarn cutting device, and the resistance imparting body are attached to a support body that is movable toward the running yarn. .