JPH05229743A - Cone paper tube - Google Patents

Abstract

PURPOSE:To prevent breakage of yarn to a certain extent almost without increasing production cost in as comparison with ordinary cone paper tube and also prevent any deformation in yarn winding layer due to slippage of yarn almost perfectly by cutting off the inner surface side on an opening edge on the large diameter side and fuzzing its cut surface. CONSTITUTION:In a cone paper tube 1, the inner surface 2 on an opening edge on the large diameter side is cut, and cut surface is fuzzed. Cutting the inner surface 2 on the opening edge means that the edge section constructed with end surface and inner surface 2 is removed by chamfering method. This is made to solve problems such as connecting with a holder, strength of paper tube itself, erection in use by delivering yarn after winding-up has been completed, etc. The fuzzing may be made by grinding the surface roughly with a wire brush, etc., after cutting off or cutting off itself may be made with a rough grinder, etc. When the paper tube is fuzzed, large friction is generated due to fuzz, thus slippage of yarn, can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention 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 or the like, and has a cone shape, that is, a cone shape. This is for taking out the yarn without unwinding the paper tube itself if the yarn is unwound from the small diameter side. As such an application, it is mainly used for cotton yarn and the like.

As shown in FIG. 4, the cone paper tube 11 is used in such a manner that the small diameter side 12 and the large diameter side 13 are supported by the support tool 14 and the holder 1.
5, the paper core is rotated by a drive source to wind the yarn. 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 tip 17 of the yarn 16 is introduced into the large diameter side 13 and then the holder 1 having the outer diameter substantially the same as the inner diameter of the large diameter side 13 is introduced.
Fit 5 In this way, the thread is held and fixed between the paper tube 11 and the holder 15, and the thread is wound by the rotation of the paper tube. When winding from the previous paper tube to the next paper tube, the thread is positioned as indicated by the dot-dash line and is likewise fixed by inserting the holder 15.

FIG. 5 shows a portion where the thread 16 is held between the end of the large diameter side 13 of the paper tube and the holder 15. The thread is held between the inside of the paper tube and the outer surface of the holder 15, and the thread comes into contact with the corner of the lower end of the paper tube and goes out. Also in this case,
There are various kinds of holders such as the shape, the degree of fitting, the angle of the contacting portion, and the like, but there is no change in that the thread comes into contact with the edge of the lower end of the paper tube and is bent.

[0006]

In this conventional cone paper tube, it is often the case that the thread is clamped and cut between the corner of the lower end of the paper tube (the edge of the end) and the holder. there were. This is because, as is clear from FIG. 5, the yarn bends at a right angle at the corner and is positioned so that the yarn is easily cut at that portion. In order to prevent this, it may be possible to press the corners to have a rounded shape, but this causes a weak gripping force of the thread, and the thread slips easily, resulting in winding misalignment.

Further, it is conceivable that the end portion is provided with a saw-toothed concavo-convex, but this has a drawback that the thread slips in the concave portion and the thread breaks in the convex portion. Therefore, in the industry, there has been a demand for a cone paper tube that can reliably hold the yarn without slipping and has no risk of cutting the yarn.

[0008]

[Means for Solving the Problems] In view of the current 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.

To cut off the inner surface side of the opening edge means to remove it by chamfering the edge portion composed of the end plane and the inner surface. The end plane refers to a portion that is in contact with the plane when it is erected on the plane with the large diameter side facing downward. The degree of cutting is not particularly limited, but it is preferable to leave half or more of the end plane. The reason for this is that there is a problem of connection with the holder, a problem of strength of the paper tube itself, and a problem of standing up when the yarn is unwound and used after winding. Also, the cut length of the paper tube in the rotation axis direction may be appropriate,
It is not directly related to the present invention. It should be easy to remove it, and it should be about the same as the lateral direction. Excision is to scrape off that part, not to press it to reduce its volume. The shape to be cut off may be such that the corners of the end surface of the paper tube (particularly the portion for gripping the thread) are eliminated. This prevents thread breakage.

The fluffing method may be any method such as roughening the surface with a wire brush after cutting, or cutting with a rough grinder. The term "fluffing" includes the meaning of causing the fibers in the paper to protrude above the surface, unlike simply scraping metal or the like roughly. The fluff causes a great resistance and prevents the yarn from slipping. The degree of fluffing also varies depending on the thickness of the thread, but may be relatively small. The fiber length and the like protruding on the surface are very small, and actually, they are slightly rough.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail based on the embodiments shown in the drawings. FIG. 1 is a perspective view of a cone paper tube 1 of the present invention. The inner side 2 of the large-diameter side end is partially cut off to make the surface fluffy. Most of the surface 3 of the paper tube 1 is flocked to prevent slippage. The shape, size, angle, etc. are the same as ordinary cone paper tubes and are not special.

FIG. 2 is a partially enlarged cross-sectional view of the cut portion of FIG. A portion 4 shown by a broken line is cut off, leaving more than half of the paper tube end surface 3, and the surface portion 5 is fluffed. When excising, it is desirable to excise by curving so that the boundary with the remaining portion does not become sharp. In this example, about 60% of the end surface 3 of the paper tube is left.

FIG. 3 shows the enlarged portion shown in FIG. 2 gripping the thread, and is similar to FIG. It can be seen that there is no edge in the part that bends at a right angle as the thread exits from the gripped part, reducing the risk of cutting. In addition, the surface is fluffed to prevent slippage. Actually, this paper tube was trial-produced and used, but the yarn was hardly cut and the yarn was not slipped.

[0014]

The cone paper tube of the present invention has the following effects. Due to the simple structure, the manufacturing cost is almost the same as the ordinary cone paper tube. Thread breaks can be almost prevented. It is possible to almost completely prevent winding misalignment due to thread slip.

[Brief description of drawings]

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

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

FIG. 3 is a partially enlarged cross-sectional view showing a usage state.

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

5 is a partially enlarged sectional view of FIG.

[Explanation of symbols]

 1 Cone paper tube 2 Inside of paper tube end 3 Paper tube end surface 4 Cut portion 5 Cut surface

Claims (1)

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