JPH06115827A - Composite paper tube for thread winding - Google Patents

Abstract

PURPOSE:To improve thread guard factor by winding a male fastener on a paper layer at least in the vicinity of the surface layer in paper layers forming a spiral paper tube, and engravedly providing an opening part containing a thread holding groove on the outer circumferential face of the end mushroom part of the paper tube so as to pass through the male fastener. CONSTITUTION:In many paper layers P1-Pn constituting a composite paper tube 1 for winding thread, a male fastener (face fastener) 2 closely provided with many hook or mushroom shaped projections thereon is arranged on the paper layers P4-P6 of surface layer at regular intervals. This male fastener 2 is spirally wound in parallel with the winding direction of a paper tape 5. An opening part 4 constituted of an introducing groove 41 and a thread holding groove 42 along the circumferential direction is engravedly provided in the vicinity of the end part 3 of the paper tube 1. By spirally providing the male fastener 2 in this way, the groove of the opening part engravedly provided in the circumferential direction is passed through the male fastener 2 part at several positions, and hence thread guard factor can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a composite paper tube for winding a yarn, in particular, a difference in air resistance or contact resistance due to a difference in the type of yarn or a winding speed, or vibration due to mechanical rotation The present invention relates to a structure of a paper tube in which an opening structure having a high catching property can be obtained at any position so that a yarn that behaves differently depending on dimensional accuracy and strength of the paper tube itself can be appropriately caught. .

[0002]

2. Description of the Related Art A bobbin for winding a yarn is used for winding and holding a yarn sent out from a spinning process in the case of synthetic fiber. Conventionally, there are wood, metal, synthetic resin, etc., but recently paper is often used because of cost and weight. The winding method is such that the spun yarn is locked by a locking portion provided on the bobbin and is wound from there. Until the thread is locked in this locking tool, it cannot be wound up and must be discarded. Therefore, it is necessary not only to eliminate the bobbin that cannot be locked but also to lock it in a short time.

In addition, due to the development of synthetic fiber manufacturing technology,
Since the spinning can be performed at a higher speed, the shortening of the locking time and the certainty of locking have become more significant.

Conventionally, a device shown in FIG. 3 has been proposed as a locking device (thread catching device) for a yarn winding paper tube (US).
P 3,103,305). This paper tube has an opening groove 21 formed in the circumferential direction near the end of the paper tube body 20, and the opening groove 21 is formed.
The close groove 22 is formed on the extension of the. That is, as shown in FIG. 3 (a), the opening groove 21 is formed with a shoulder having a large curved surface to facilitate guiding the yarn, and the close groove 22 is provided with a groove as shown in FIG. 3 (b). The shoulder curved surface is made smaller to increase the close contact area, and the thread is introduced into the close groove 22 to be captured and fixed, and the thread from the full-wrapped paper tube is cut to make the thread end empty. It is designed to be wrapped around.

Further, as described above, the spinning and drawing speeds of the yarn are extremely high, so that the behavior of the yarn has become extremely uncontrolled. Factors that may be considered are the shape of the yarn, denier, air resistance due to the yarn speed, contact resistance to the yarn by the guide rolls, vibration associated with machine rotation, dimensional accuracy and strength of the paper tube, and the like.

[0006]

However, even the conventional bobbin provided with the above-mentioned opening groove 21 and the close groove 22 cannot cope with the fine count yarns, which has been the tendency of high-quality yarns recently, and the capture rate is high. Often falls below 95%. Also, as already mentioned, due to the speeding up of spinning polyester and nylon, the yarn is supplied at a high speed of 6000 to 8000 m / min from the previous process, so a slight drop in the capture rate and yarn to the empty paper tube The extension of the hanging time leads to the generation of a large amount of damaged yarn.

Further, although the behavior of the supplied yarns can be predicted to some extent, it is impossible to completely cope with the limited number and size of the grooves, so that the paper tube is eventually applied. The position of the yarn catching mechanism is the yarn shape, denier,
Alternatively, it can be said that it can be changed appropriately for each machine. However, there has never been such a changeable and surely captured paper tube.

[0008]

Therefore, the present inventor has finally completed the present invention as a result of earnest research in view of the above-mentioned various points, and is characterized by forming it in a spiral paper tube. Male fasteners are wound around the paper layer at least near the surface layer of the paper layer in parallel to the paper layer with one or more multi-layer intervals, and an opening is formed on the outer peripheral surface near the end of the paper tube. It is formed in a narrow width, and a yarn gripping groove is linearly or serratedly formed in the opening and passes through the male fastener.

Here, the "spiral paper tube" is a paper tube which is a spirally wound paper and is joined to form a multilayer structure. The paper tube according to the present invention is basically the same as this, but has a structure that is largely different in that it has a male fastener (described later) portion therein.

That is, when a plurality of paper tapes having a specific width are spirally wound and joined, a male fastener tape-like material is wound in parallel with the paper tape when winding several layers. The male fastener exists in a spiral shape inside the tube. Of course, this male fastener need only be present on the end side of the paper tube, so it need not be the same as other paper tapes.

The term "male fastener" refers to one in which a large number of hook-shaped or mushroom-shaped projections are densely provided, and is usually the male side of the surface fastener. The reason for providing this male fastener is to enclose a member having a good thread-capturing property in the bottom position portion or inside the groove of the opening provided near the end of the paper tube. The fastener is preferably provided near the surface layer of the paper layer forming the paper tube. “Near the surface layer” is a phrase that indicates the depth close to the surface in the range not exposed to the surface, but it depends on the size and depth of the opening provided here, or the thickness of the wound yarn. There are various possibilities and they are not limited by numerical values. If it is general, it is preferable that the width is 5 to 10 mm, the depth is 1 to 3 mm in the first layer, and the final layer is 3 to 6 mm.

The opening is a groove-shaped notch provided as appropriate depending on the winding machine to be installed and the type of yarn to be wound.
It is often composed of a slightly wide introduction groove and a holding groove having an extremely small width, and is engraved in the vicinity of the end of the paper tube along its circumferential direction. The engraving place may be plural places instead of one place. In the case of the paper tube of the present invention, since the male fastener is previously provided in a spiral shape inside thereof, somewhere inside the engraved groove will come into contact with the male fastener portion, and which portion is engraved. Even if the above is selected, the effect is obtained that the groove has a high yarn capture rate.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail based on the embodiments shown in the drawings.

FIG. 1 shows an example of a sectional shape of a composite paper tube 1 for winding a yarn according to the present invention (hereinafter referred to as "the paper tube 1 of the present invention"). , The multi-layered paper layers P1, P2, P3 ...
The male fasteners 2 are arranged at equal intervals on the paper layers P4, P5, P6 on the front side of Pn. The paper layer forming the outermost layer is not included in the above-mentioned paper layers such as P1 and P2 because it is not an important member for the present invention.

FIG. 2 is a perspective view of an example of the paper tube 1 of the present invention, in which the male fastener 2 is spirally wound and its winding direction is parallel to the winding direction of the paper tape 5. ,
Further, it has been clarified that the opening 4 formed by the introduction groove 41 and the gripping groove 42 is engraved along the circumferential direction near the end 3 of the paper tube 1 of the present invention. Male fastener 2
Has a certain thickness, and the width of the paper tape 5 used here is narrower than that of a normal one by the width of the male fastener 2 so that this does not impair the smoothness of the surface of the paper tube. However, even if wound, no ridges are formed and the surface of the paper tube is kept smooth. (The width here refers to the length in the longitudinal direction of the paper tube.)

[0016]

As described above in detail, the yarn winding composite paper tube according to the present invention is a spiral paper tube, and at least the paper layer near the surface layer among the paper layers forming the spiral paper tube, Male fasteners are wound in parallel with the paper layer at one-layer or multi-layer intervals, and an opening is formed narrowly on the outer peripheral surface near the end of the paper tube. The yarn gripping groove is formed in a straight line shape or a sawtooth shape and is carved by passing through the male fastener.
It is an extremely advanced invention having various effects as described below. Since the male fastener is included in parallel with the paper tape forming the paper tube, the male fastener exists in a spiral shape inside the front surface side of the paper tube. Therefore, the groove of the opening engraved in the circumferential direction passes through the male fastener portion at several places, and the threading rate is improved. The position of this opening may change somewhat depending on the type of thread to be wound and other factors. However, in the case of the paper tube of the present invention, the male fastener portion is not affected by setting the position of the opening. pass. The male fastener with very good threading is not exposed on the surface of the paper tube and exists near the surface layer, so the smoothness of the surface of the paper tube is not impaired and it hinders the winding of the yarn. Never.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing an example of a paper tube of the present invention.

FIG. 2 is a perspective view of an example of the paper tube of the present invention.

3A is a sectional view showing a conventional example, FIG. 3A is an opening groove, and FIG.

[Explanation of symbols]

 1 Composite Paper Tube for Thread Winding 2 Male Fastener 3 Paper Tube End 4 Opening 41 Introduction Groove 42 Gripping Groove 5 Paper Tape

Claims (1)

[Claims] 1. In a spiral paper tube, male fasteners are wound at least one layer or multiple layers in parallel with at least the surface layer of paper layers forming the spiral paper tube in parallel with the paper layer. An opening is formed in a narrow width on the outer peripheral surface near the end of the paper tube, and a yarn gripping groove is engraved in the opening in a linear or sawtooth shape and passing through the male fastener. A composite paper tube for winding a yarn, which is characterized by being