JPS5916374Y2 - Device to prevent single thread from wrapping around rollers - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for preventing synthetic fiber tow from being wrapped around a roller.

Conventionally, single yarn breakage often occurs in synthetic fiber tow transport roller systems, especially drawing roller systems, and the broken single yarns wind around the rollers, causing further breakage of other single yarns, and eventually causing the fiber tow to break. Develops into total amputation.

Therefore, a worker is required to monitor and remove the roller wrap, and if the roller wrap cannot be easily removed, the processing speed must be reduced or the machine stopped, resulting in a decrease in productivity.

In the past, various proposals have been made to prevent such roller wrapping, but none have yet been found to be satisfactory.

For example, as shown in Japanese Patent Publication No. 46-26885, there is a method in which a rod-like object is passed between two points within 15 degrees from the point at which the yarn leaves the roller, and the single yarn that is about to be wound around the roller is cut by the rod-like object. be.

However, in the case of relatively small-diameter rollers, it is actually extremely difficult to sweep the rod-like body across a narrow area of 15 degrees or less, and if the rod-like body is moved away from the yarn separation point for easy installation, the effect of preventing wrapping will be small. Become.

Furthermore, as shown in Japanese Utility Model Application Laid-open No. 52-7313, a device has been proposed in which a rotating brush is brought into contact with a roller, but this method has the disadvantage that the contact condition changes due to deformation and wear of the brush, and the reliability is low.

The purpose of the present invention is to eliminate these drawbacks of the prior art and provide a device that can reliably prevent winding even with small diameter rollers.

That is, in a synthetic fiber tow transfer roller system, the present invention provides a vibrating body having a length equal to or greater than the tow width in the vicinity of the point where the yarn leaves the roller, so that the single yarn that is about to be wound around the roller is moved by the vibrating body. It is characterized by being structured so that it can be shaken off by

Hereinafter, the present invention will be specifically explained based on the drawings.

FIG. 1 shows an example in which the present invention is applied to the drawing process of synthetic fiber tow, in which undrawn tow 1 is supplied to supply roller group 2.
3. 4 at a constant speed, passed through a heating tank 5, and drawn out by a group of stretching rollers 6, 7.8, which rotate at a constant speed several times faster than supply roller groups 2 to 4, and stretched to a desired stretching ratio between them. be done.

According to one embodiment of the device of the present invention, the length of the roller is equal to or larger than the tow width in the vicinity of the point where the yarn leaves the last roller 8 of the drawing roller group where winding of the single yarn is likely to occur. A vibrating body 9 is provided, and the single yarn that is about to be wound around the roller 8 is shaken off by the vibration of the vibrating body, thereby preventing the yarn from being wound around the roller.

The amplitude and frequency of the vibrating body depend on the roller diameter and tow speed, etc., and cannot be determined unconditionally, but in normal cases it is 3 to 15
An amplitude of mm and a frequency of 51 to 300 vibrations/min are sufficient.

As means for generating vibrations in the vibrating body 9, means as shown in FIG. 2 or FIG. 3 can be considered, but the present invention is not limited thereto.

Fig. 2 shows an example using a vibrator. In Fig. 2, 10 is a solenoid coil that is wound around an iron core 11 to form an electromagnet. It is attached to a frame with a mounting part 12, and is capable of sending a pulsed current. The vibrating body 9 is attracted or released by the vibrating body 9 to vibrate.

FIG. 3 shows a projection 13 attached to the end surface of the roller 8.
The rotation of the roller 8 contacts the vibrating body 9 attached to the pedestal at the mounting part 14 and causes it to vibrate.

The material, shape, etc. of the vibrating body used in the present invention are not particularly limited as long as it can withstand vibrations, but it is preferably a plate-shaped vibrating body made of metal, synthetic resin, carbon fiber molding, or the like.

According to the device of the present invention, since the single yarn that is about to be wound around the roller is shaken off by the vibrating body, wrapping around the roller hardly occurs and productivity can be improved.

The device of the present invention can be effectively used for a conveying roller system, especially a drawing roller system, for tows such as polyester synthetic fibers and polyacrylonitrile synthetic fibers.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the stretching process, FIG. 2 is a side view showing one example of the invention, and FIG. 3 is a perspective view showing another example of the invention. 1... Unstretched tow, 2, 3, 4... Supply roller, 5
... Heating tank, 6.7.8... Stretching roller, 9...
Vibrating body, 10... Solenoid coil, 11... Iron core, 12.14... Mounting part, 13... Projection.

Claims (1)

[Scope of utility model registration request] In a synthetic fiber tow transfer roller system, a vibrating body having a length equal to or greater than the tow width is provided near the point where the yarn leaves the roller, and the vibrating body is configured to shake off single yarns that try to wrap around the roller. A device for preventing single yarn from being wrapped around a roller.