JPH0248442Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The invention involves intersecting endless false-twisting belts in an X-shape, nipping fiber bundles using the intersecting surfaces as nipping surfaces, and applying false twist to the fiber bundles. The present invention relates to a device for removing fiber waste and the like adhering to the back surface of the endless false-twisting belt in a false-twisting device for imparting false-twisting.

〓Prior art〓 In the case of a belt-type false-twisting device, two sets of false-twisting belts supported by a pair of pulleys are prepared, and the false-twisting belts are crossed in an X-shape so that the outer peripheral surfaces of the false-twisting belts are in pressure contact with each other.
By introducing the fiber bundle between the nip surfaces and running the false-twisting belt in a fixed direction, the fiber bundle sandwiched between the nip surfaces is twisted and false-twisted. In the case where the yarn is installed near the outlet of an air spinning nozzle that is installed subsequently, the fine fibers attached around the yarn coming out of the air spinning nozzle separate from the yarn, scatter and accumulate around the air spinning nozzle. Among these accumulated fibers, those that fall onto the back side of the false-twisted belt are repeatedly compressed by the outer peripheral surface of the pulley and the inner peripheral surface of the belt as the pulley rotates, and solidify due to the heat generated by the friction between the two. It sticks to the inner peripheral surface of the belt or the outer peripheral surface of the pulley. If this is done, the thickness of the false-twisted belt will vary slightly depending on its location, which will cause minute vibrations when it comes into contact with the pulleys, and this variation will cause the nip pressure between the nip surfaces to fluctuate. However, it also makes a very significant change in the addition of false twist.
In addition, due to fiber debris etc. adhering to the pulley surface, the pulley surface becomes in the same state as if the diameter were increased, which affects the running speed of the false-twisting belt and, in turn, causes a change in the number of false twists. Ta.

〓Problem to be solved by the invention〓 In view of the above-mentioned points, the present invention aims to prevent fiber waste or fluff from flying and adhering to the front and back surfaces of the false-twisting belt or the pulleys, etc. purpose.

〓Means for solving the problem〓 Two sets of endless false-twisted belts stretched over a pair of pulleys are crossed in an X shape with their belt outer peripheral surfaces abutting each other, and the abutting and intersecting surfaces are used as nip surfaces. In the belt-type false twisting device, a compressed air injection nozzle was provided at a position where the jetted compressed air was directed toward the back surface of the belt and abutted against it.

〓Effect〓 The compressed air ejected from the compressed air injection nozzle installed at a position where it can inject compressed air toward the back surface of the false-twisted belt blows away fluff or fiber debris attached to the back surface of the false-twisted belt, and also The airflow also keeps the pulley surface free of fiber debris.

〓Example〓 Embodiments of the present invention will now be described with reference to the drawings.

The illustrated example shows a case where a false twisting device is used to produce a spun yarn, and the nip surface 4 is located at the yarn outlet 3 of the air injection nozzle 2 provided following the front roller pair 1 of the drafting device. A false twisting device 5 is provided so that the The temporary combustion device 5 is configured as follows.

A base 7 supported by a shaft 6 provided on the frame
Then, the first false-twisted belt support arm 8 and the second false-twisted belt support arm 9 are each fixed integrally. The first false-twisting belt support arm 8 is provided with a drive shaft 10 and a driven shaft 11 provided through the base 7, and the false-twist belt 14 is stretched between pulleys 11 and 12 provided at the top thereof.

The second false-twisting belt support arm 9 also supports pulleys 17 and 18 by a drive shaft 15 and a driven shaft 16, and a false-twist belt 19 is stretched between them. The false twisted belts 14 and 19 are positioned by belt support arms so as to intersect in an X-shape. The outer circumferential surface of the belt is appropriately pressed by a mechanism (not shown), and the pressing surface is the nip surface N of the thread Y.

A belt protection member 20 is provided on the inner surface of the first false-twisted belt 14, and a compressed air injection nozzle 21 is provided in the member 20 with an open end. The opening direction of the compressed air injection nozzle 21, that is, the direction in which the compressed air is ejected, is directed toward the inner circumferential surface of the false-twisted belt 14.

A belt protection member 22 is provided on the inner surface of the second false-twisted belt 19, and a compressed air injection nozzle 23 is provided in the member 22 with an open end. The opening direction of the compressed air injection nozzle 23, that is, the direction in which the compressed air is ejected, is directed toward the inner circumferential surface of the false-twisted belt 19.

The tip portions of the compressed air injection nozzles 21 and 23 are made of metal tubes, but the middle portions are made of flexible synthetic resin tubes and are connected to a pressure source (not shown).

When compressed air is ejected from the compressed air ejection pipe, the ejected compressed air blows against the back surface of the false-twisted belt, thereby preventing the adhesion of fluff or fiber waste to the false-twisted belt.

It is effective to perform the above-mentioned pressurized air jetting intermittently.

Effects of the invention The device of the invention consists of two sets of endless false-twisted belts stretched between a pair of pulleys, which intersect in an X-shape with their outer peripheral surfaces abutting each other, and the abutting intersecting surfaces are the nip surfaces. In the belt-type false-twisting device, the compressed air injection nozzle was installed at a position where the jetted compressed air was directed toward the back side of the belt and came into contact with it.
It can prevent the adhesion and accumulation of fluff, etc.
It is possible to eliminate uneven twisting, an increase in the number of twists, etc. caused by these substances adhering to the back surface of the false-twisted belt.

[Brief explanation of the drawing]

Fig. 1 is a front view of the false twisting device, Fig. 2 is a right side view showing the compressed air injection nozzle provided on the second false twisting belt shown in Fig. 1, Fig. 3 is a sectional view taken along the line of Fig. 2, 4 is a left side view of the false twisting device, FIG. 5 is a rear view, and FIG. 6 is a plan view. 14, 19... false twist belt, 12, 13, 1
7, 19... Pulley, 21, 23... Compressed air injection nozzle, N... Nip surface.

Claims (1)

[Scope of utility model registration request] In a belt-type false-twisting device, two sets of endless false-twisting belts stretched over a pair of pulleys are crossed in an X-shape with their belt outer peripheral surfaces abutting each other, and the abutting and intersecting surfaces are nip surfaces. A belt-type false-twisting device characterized in that a nozzle is provided at a position where sprayed compressed air comes into contact with the back surface of the belt.