JPH0735457U - Thread winding paper tube - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a yarn winding paper tube capable of reliably capturing even fine denier yarn and improving the capturing and cutting functions. [Structure] This yarn winding paper tube has a wide-width introduction groove 2, a zigzag-shaped or sawtooth-shaped gripping groove 3 having a rough facing surface, and a close cutting groove on an outer peripheral surface near the end of the paper tube body 1. In the paper tube having 4 engraved, the pressing recesses 5 and 6 are provided on the outer peripheral surfaces of the gripping groove 3 and the cutting groove 4, and the groove width is gradually narrowed in order to make the pressing force strong in the traveling direction. A yarn winding paper tube characterized by.

Description

[Detailed description of the device] [Industrial applications]

 The present invention relates to a yarn winding paper tube in a spinning process of synthetic fibers such as polyester and nylon, and particularly to an improvement of a paper tube suitable for winding a fine fine count yarn.

[0002]

[Prior art]

 Conventionally, when winding high-grade fine count yarns such as polyester and nylon around a paper tube, the yarn take-up rate has always been a problem, and at higher speeds and finer counts, the yarn take-up rate decreases and the loss increases. became.

Generally, when a yarn is directly wound around a paper tube by a high-speed spinning process of synthetic fibers, the yarn is continuously supplied directly from the spinning process, so that the yarn is emptied from a fully wound paper tube. When switching to the paper core automatically, the yarn at the beginning of winding temporarily loosens and the yarn falls off from the empty paper pipe, and there are cases in which the yarn is not reliably captured and cut. Thread removal failure occurs. For this reason, it is required that the success rate of thread hooking be approximately 100%.

If the yarn removal fails at the time of this switching, the yarn is fed at a speed of 6000 to 8000 m / min in the spinning process at a high speed, so that a large amount of lost yarn is generated, which is very uneconomical. .

Therefore, conventionally, in a yarn winding paper tube, in order to improve the yarn catching rate, Japanese Utility Model Publication No. 1-33565 (FIG. 9) and Japanese Utility Model Publication No. 3-30378 (FIG. 10). As shown in FIG. 4), a wide circumferential insertion groove 2 is engraved in a part of the outer periphery near the end of the paper tube main body, and is formed in a sawtooth shape or a zigzag shape on the extension line of the introduction groove 2. A paper tube is used in which a gripping groove 3 is provided and a cutting groove 4 is engraved on the extension line thereof.

That is, the yarn is easily introduced in the introduction groove 2 formed in a wide width, and is reliably caught and grasped by the grasping groove 3 formed in a sawtooth shape or a zigzag shape with the opposite groove surface as a rough surface. , The tight ends 4 are surely cut and the yarn ends are wound around the empty paper tube.

[0007]

[Problems to be solved by the device]

 However, the gripping groove and the cutting groove for gripping the yarn are both engraved and machined by the processing blade, so that the processing blade itself cannot maintain a uniform shape due to a decrease in sharpness and a change in shape due to wear. For this reason, there is a fear that a yarn removal failure may occur.

For this reason, it was necessary to pay close attention to the abrasion of the machining blade. That is, this is because the shape of the processed groove is changed, so that the relationship with the yarn is changed, and there is a problem in that the capture and cutting of the yarn of high-grade fine denier yarn is greatly hindered.

The present invention has been researched and developed with the object of solving the above-mentioned problems, and it is possible to reliably capture even fine denier yarns and improve the capturing and cutting functions of the yarn winding device. The purpose is to provide a paper tube.

[0010]

[Means for Solving the Problems]

 As means for solving the above problems and achieving the object, in the present invention, a wide introduction groove, a zigzag-shaped or sawtooth-shaped gripping groove with a rough surface on the outer peripheral surface near the end of the paper tube main body, and In a paper tube in which a close cutting groove is engraved, a pressing recess is provided on the outer peripheral surface of the gripping groove and the cutting groove, and the width of the thread is formed second narrower in order to strongly press the pressing force in the traveling direction. Developed and adopted a roll paper tube.

Further, according to the present invention, in the yarn winding paper tube configured as described above, the yarn winding paper tube in which the pressing recess is formed in a rectangular shape long in the circumferential direction, and the yarn winding paper tube A thread winding paper tube in which the shape of the pressure recess is formed in an elliptical shape long in the circumferential direction, and a thread winding paper tube in which the shape of the pressing recess is formed in a ladder shape long in the circumferential direction. Developed and adopted.

[0012]

[Action]

 In the case of automatic switching from a full paper tube to an empty paper tube, the thread is easily introduced through the wide introduction groove, and the opposite surface is rough and has a zigzag or sawtooth gripping groove. Since the groove widths of the cutting groove and the cutting groove are gradually narrowed due to the formation of the pressing recesses provided on the peripheral surface of both grooves, the catching, grasping and cutting of the fine count yarn by both grooves can be achieved reliably. Therefore, the threading rate is improved.

[0013]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 is a paper tube body, and a thread introduction groove 2 having a wide width and a predetermined depth is engraved in a part of an outer peripheral surface near an end thereof. A zigzag-shaped or sawtooth-shaped gripping groove 3 having a rough surface on the opposite surface is engraved on the extension line, and a cutting groove 4 on which the inner surface of the groove is closely adhered is engraved on the extension line. It is being touched.

Only the outer peripheral surfaces of the gripping groove 3 and the cutting groove 4 are pressed by a pressing body or the like (not shown) so that the rectangular pressing groove pressing recess 5 and the cutting groove pressing recess 5 are long in the circumferential direction. 6 is attached. Therefore, the pressing force pressed from the outer peripheral surfaces of the gripping groove 3 and the cutting groove 4 is strengthened in the traveling direction, so that they are pressed against each other due to the increase in density, and the gaps w ₁ and w ₂ shown in FIGS. In addition, w ₁ −Δw ₁ and w ₂ −Δw _{2 are obtained} , and the groove width is narrowed, so that fine denier yarns can be captured and cut more easily than before.

The pressing recesses 5 of the gripping groove and the pressing recesses 6 of the cutting groove formed by the pressing body are preferably long in the circumferential direction in terms of the press working area. Therefore, in the case of FIG. Although the shape is shown, the shape may be replaced by the elliptical shape shown in FIG. 2 or the ladder shape shown in FIG.

In the above embodiment, the introduction groove 2, the gripping groove 3, and the cutting groove 4 are engraved in a part of the outer peripheral surface of the paper tube body 1, but the gripping groove 3 and the cutting groove 4 are described. It goes without saying that 4 may be engraved over the entire remaining length.

[0017]

[Effect of device]

 Since the present invention is configured as described above, when automatically switching from the full roll paper tube to the empty paper tube, the yarn is easily introduced into the introduction groove and the groove width is larger than that at the time of engraving by pressing. With the narrower grip groove, a fine denier yarn can be firmly narrowed and captured and gripped.

Further, since the cutting groove is pressed with a stronger pressure than the pressing force of the gripping groove, the cutting groove is formed in a groove that is more closely attached and can be cut reliably, the threading rate is improved, and threading failure is significantly reduced. It can contribute to the improvement of productivity.

Further, if the pressing recess is formed in a rectangular shape that is long in the circumferential direction, the pressing processing area is small and efficient, and if the pressing recess is formed in an elliptical shape or a ladder shape that is long in the circumferential direction, As with the rectangular shape, it is advantageous in terms of the pressing area, and since the width is narrowed in the traveling direction, the pressing force per unit area can be made smaller and more efficient.

[Brief description of drawings]

FIG. 1 is a perspective view of a yarn winding paper tube showing an embodiment of the present invention.

FIG. 2 is a perspective view of a yarn winding paper tube according to another embodiment of the present invention.

FIG. 3 is a perspective view of a yarn winding paper tube showing still another embodiment of the present invention.

FIG. 4 is an enlarged cross-sectional view taken along the line AA of FIG.

5 is an enlarged cross-sectional view taken along the line BB of FIG.

FIG. 6 is an enlarged cross-sectional view taken along the line CC of FIG.

7 is an enlarged cross-sectional view taken along the line DD of FIG.

FIG. 8 is an enlarged cross-sectional view taken along the line EE of FIG.

FIG. 9 is a perspective view of a conventional yarn winding paper tube.

FIG. 10 is a perspective view of another conventional yarn winding paper tube.

[Explanation of symbols]

 1 Paper tube main body 2 Wide introduction groove 3 Gripping groove 4 Cutting groove 5 Gripping groove pressing recess 6 Cutting groove pressing recess

Claims (4)

[Scope of utility model registration request] 1. A paper tube in which a wide introduction groove, a zigzag-shaped or sawtooth-shaped gripping groove having a rough surface on the opposite surface, and a closely cutting groove are engraved on the outer peripheral surface near the end of the paper tube body, A yarn winding paper tube characterized in that a pressing recess is provided on the outer peripheral surfaces of the gripping groove and the cutting groove, and the groove width is gradually narrowed in order to make the pressing force a strong pressure in the traveling direction. 2. The yarn winding paper tube according to claim 1, wherein the pressing recess is formed in a rectangular shape elongated in the circumferential direction. 3. The yarn winding paper tube according to claim 1, wherein the pressing recess is formed in an elliptical shape elongated in the circumferential direction. 4. The yarn winding paper tube according to claim 1, wherein the pressing concave portion is formed in a ladder shape that is long in the circumferential direction.