JP3172842B2 - Cone paper tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cone paper tube.

[0002]

2. Description of the Related Art A cone paper tube serves as a core for winding a yarn at the time of spinning and the like, and has a cone shape, that is, a cone shape. This is to take out the yarn without rotating the paper tube itself if the yarn is unwound from the small diameter side when the yarn is unwound. Such uses are mainly used for cotton yarns and the like.

[0003] As shown in FIG. 4, a cone paper tube 11 is used in which a small diameter side 12 and a large diameter side 13 are supported by a support 14 and a holder 1.
5 and winds the yarn by rotating the paper tube by a drive source. The driving method includes a method of rotating the holder 15 and a method of rotating the holder 15 via a drum provided in contact with the paper tube. Of course, such a method itself is not relevant to the present invention.

At the start of winding, in order to fix the yarn, the leading end 17 of the yarn 16 is introduced into the large-diameter side 13 and then the holder 1 having the same outer diameter as that of the inner diameter is introduced into the large-diameter side 13.
5 is fitted. By doing so, the yarn is held and fixed between the paper tube 11 and the holder 15, and the yarn is wound up by the rotation of the paper tube. When winding from the previous paper tube to the next paper tube, the yarn is positioned as shown by the dashed line and is similarly fixed by inserting the holder 15.

FIG. 5 shows a portion where the yarn 16 is gripped between the end of the large diameter side 13 of the paper tube and the holder 15. The yarn is gripped by the inside of the paper tube and the outer surface of the holder 15, and comes out of contact with the corner at the lower end of the paper tube. Again, in this case,
Although there are various shapes and shapes of the holder, the degree of fitting, the angle of the contacting portion, and the like, there is no change in the state where the thread is bent in contact with the edge of the lower end portion of the paper tube.

[0006]

In this conventional cone paper tube, the yarn is often pinched and cut between the corner at the lower end of the paper tube (edge at the end) and the holder. there were. As is apparent from FIG. 5, the yarn is bent at a right angle at the corner, and is positioned so as to be easily cut at that portion. In order to prevent this, it is conceivable to press the corners to make them round, but in this case, the force for grasping the yarn is weak, and the yarn is slippery and the winding is displaced.

[0007] Further, it is conceivable to provide a saw-like unevenness at the end, but this has a drawback that the thread slips in the concave portion and the thread is cut in the convex portion. Therefore, in the industry, there has been a demand for a cone paper tube that can hold the yarn without slipping and that has no danger of cutting the yarn.

[0008]

In view of the above situation,
The present inventor has completed the cone paper tube of the present invention as a result of earnest research, and is characterized in that the inner surface side of the opening edge on the large diameter side is cut off and the cut surface is fluffed. It is in.

Cutting off the inner surface side of the opening edge means removing the edge formed by the end plane and the inner surface by chamfering. The end plane refers to a portion that comes into contact with the plane when the plane is placed on a plane with the large diameter side down. The degree of resection is not particularly limited, but it is preferable to leave at least half of the end plane. This is because of the problem of connection with the holder, the problem of the strength of the paper tube itself, and the problem of standing up when the yarn is fed out and used after winding. In addition, the cut length in the rotation axis direction of the paper tube may be appropriate,
The present invention is not directly related. What is necessary is just to make it easy to resect, and it may be the same degree as a lateral direction. Excision refers to shaving off a portion of the volume, rather than pressing it to reduce its volume. The shape to be cut may be such that corners of the end face of the paper tube (particularly, a portion where the thread is gripped) are eliminated. This can prevent thread breakage.

The method of raising the fluff may be any method such as a method of roughly cutting the surface with a wire brush or the like after cutting, or a method of performing cutting with a coarse grinder. The term “fluffing” is different from simply shaving metal or the like, and also means that fibers in the paper are projected above the surface. Due to the fluff, a large resistance is generated, and yarn slippage can be prevented. The degree of fuzzing also varies depending on the thickness of the yarn, but may be relatively small. The length of the fiber and the like protruding from the surface is very small, and is actually a little rough.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the embodiments shown in the drawings. FIG. 1 is a perspective view of a cone paper tube 1 of the present invention. The inside 2 of the large diameter end is partially cut away to make the surface fluffy. Most of the surface 3 of the paper tube 1 is subjected to flocking to prevent slippage. The shape, size, angle, etc. are the same as those of a normal cone paper tube, and are not special.

FIG. 2 is a partially enlarged cross-sectional view of the cut-out portion of FIG. A portion 4 indicated by a broken line is cut away while leaving at least a half of the paper tube end surface 3, and the surface portion 5 is fluffy. In cutting, it is desirable to cut and curve so that the boundary with the remaining portion is not sharp. In this example, about 60% of the paper tube end face 3 is left.

FIG. 3 shows the enlarged portion shown in FIG. 2 gripping the yarn, and is similar to FIG. It can be seen that there is no edge at the portion that bends at a right angle to exit outward from the portion where the thread is gripped, reducing the risk of cutting. In addition, the surface is fluffy to prevent slippage. When this paper tube was actually made as a trial and used, the yarn was hardly cut and there was no yarn slippage.

[0014]

According to the cone paper tube of the present invention, the following effects can be obtained. Due to the simple structure, the manufacturing cost is almost the same as a normal cone paper tube. Thread breakage can be almost prevented. Winding slippage due to yarn slippage can be almost completely prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of the cone paper tube of the present invention.

FIG. 2 is a partially enlarged sectional view of FIG.

FIG. 3 is a partially enlarged sectional view showing a use state.

FIG. 4 is a side view showing a usage state of a conventional cone paper tube.

FIG. 5 is a partially enlarged sectional view of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cone paper tube 2 Inside of a paper tube end 3 Paper core end surface 4 Cutting part 5 Cutting surface

Claims (1)

(57) [Claims] 1. A cone paper tube characterized in that the inner surface side of the opening edge on the large diameter side is cut off and the cut surface is fluffed.