JPH10338394A - Take-up core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To satisfactorily remove a take-up core from a take-up product or a take-up piece, by tubularly bending a leaf spring in the cross direction, piling the leaf spring in the double wall form at least over a constant angle range from its both side edges, and taking up web material or others on a take-up core. SOLUTION: A leaf spring 3 is tubularly bent in the cross direction. One leaf spring 3 is bent in the double wall form over whole circumference from its both side edges 4, and is piled up. When a web material 1 is taken-up on a take-up core, a take-up core 2 receives its take-up pressure. In this case, because bent parts 5a, 5b of the leaf spring 3 reinforce the take-up core 2, the take-up core 2 bears the take-up pressure of the web material 1 and is not damaged. Furthermore, take-up pressure of the web material 1 acts to the bent parts 5a, 5b of the leaf spring 3, the bent parts 5a, 5b of the leaf spring 3 is elastically transformed and compressed due to the take-up pressure, and the web material 1 is taken-up in this condition. Therefore, the web material 1 can be tightly taken-up.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding device for winding a web material, another material or a lug around a winding core, and more particularly to a winding core for the same.

[0002]

2. Description of the Related Art For example, in a slitter for slitting a web material such as paper or plastic film into a plurality of strips, each web material is wound on a winding core after slitting. This gives a wound product with a winding core, which is removed from the slitter. The winding core consists of a paper tube or a plastic tube. Further, when slitting, ear pieces are formed on both side edges of the web material, and the ear pieces are also wound around the winding core. Thereafter, the wound piece is processed as scrap. Scrap is often recycled into some material.

[0003] In recent years, in particular, coreless wound products have been in high demand for wound products of web material. A coreless winding product is a winding product without a winding core.
Also, when the ear piece is wound around the winding core, there is a problem that the winding core is mixed as an impurity when the wound piece is processed as scrap or when it is reproduced into some material. It is required to be removed from the pieces.

Accordingly, attempts have been made to wind up the web material and the ear pieces by themselves without using the winding core. In this case, although the web material and the ear pieces can be wound loosely, the web material and the ear pieces can be wound firmly. Can not be wound up.
For this reason, there is a problem that the web material and the ear pieces cannot be wound up accurately, and the windings are dislodged.

[0005] A coreless wound product may be wound by an air-type expansion winding shaft. In the case of a pneumatic expansion winding shaft, air can be supplied to the winding shaft and the winding shaft can be expanded in the radial direction. Thereafter, the web material is wound around the winding shaft, and after the winding is completed, when the air is released from the winding shaft, the winding shaft is contracted in the radial direction and can be pulled out from the wound product. Thereby, a coreless wound product can be obtained. However, there is a problem that the configuration of the air-type expansion winding shaft is complicated and the cost is high.

[0006]

SUMMARY OF THE INVENTION The present invention uses a new configuration for the winding core, winds the web material, other material or lugs around the winding core, and then winds the winding core to a winding product or winding. It is intended to be removable from the piece and to eliminate the need to use an air-type expansion take-up shaft.

[0007]

The invention according to this application is two inventions, and according to the first invention, one leaf spring is tubularly curved in the width direction. The leaf springs are overlapped in a double-walled manner over at least a certain angular range from both side edges. This is used as a winding core.

According to the second aspect of the invention, the relatively elastic plastic pipe is cut off at a certain angle in the circumferential direction, the cut portion is covered by the cover, and the cover is fixed to the plastic pipe on one side of the cut portion. Is done. Furthermore, on the other side of the cut-off portion, the cover and the plastic tube are superposed over the cut-out portion of the plastic tube at least over a certain angular range in a double-walled manner, which is used as a winding core.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.

In FIG. 1, this is a slitter winding device, and a web material 1 such as paper or plastic film.
Are slit into a plurality of strips, and after the slitting, the web material 1 is guided to a winding core 2 and wound up. The web material 1 is of constant width, the width corresponding to the length of the winding core 2.

The take-up core 2 is obtained by bending a single leaf spring 3, and as shown in FIG. 2, the leaf spring 3 is curved in a tubular shape in the width direction. Further, the leaf spring 3 is superimposed in a double wall shape over at least a fixed angle range from both side edges 4 thereof. In this embodiment, one leaf spring 3 has two side edges 4.
And over the entire circumference is curved into a double wall shape and overlapped. This is used as the winding core 2. Further, both side edges 4 of the leaf spring 3 are bent inward in the radial direction, and the winding core 2 is reinforced by the bent portions 5a and 5b.

The winding core 2 is disposed between the pair of tapered cones 6a and 6b. Taper cones 6a, 6
b has a tapered surface 7 and a flange 8 and is fitted to the shaft 9. The shaft 9 is supported by bearings 10 and connected to a motor 11.

Incidentally, of the tapered cones 6a and 6b,
The tapered cone 6a is only fitted on the shaft 9 and can be extracted from the shaft 9. The tapered cone 6b is fitted and fixed to the shaft 9. Therefore, first, the winding core 2 is disposed around the shaft 9, and then the tapered cone 6 a is attached to the shaft 9.
And take up the winding core 2 into each of the tapered cones 6a, 6b.
It can be placed between them.

Further, an external thread is formed at one end of the shaft 9 and a nut 12 is screwed thereto. The nut 12 is rotated around the shaft 9 so that the taper cone 6a can be pushed by the nut 12. The tapered cone 6a slides along the shaft 9 and advances toward the tapered cone 6b. Therefore, the winding core 2
Is sandwiched between the tapered cones 6a and 6b, engages with the tapered surface 7, and receives the wedge action of the tapered surface 7. Therefore, as shown in FIG. 3, the tubular leaf spring 3 elastically deforms radially outward and expands. Accordingly, both side edges 4 are relatively displaced in the circumferential direction, thereby reducing the overlapping portion of the leaf spring 3.

Therefore, the winding core 2 is elastically deformed and expanded by the tapered cones 6a and 6b, and the radius thereof is enlarged. Thereafter, the flanges 8 of the tapered cones 6a and 6b engage with both ends of the winding core 2, and the winding core 2 is sandwiched and fixed between the flanges 8 of the tapered cones 6a and 6b. Thereafter, the shaft 9, the tapered cones 6a and 6b, and the winding core 2 are driven by the motor 11 and rotated. Therefore, the web material 1 can be wound around the winding core 2 and can be firmly wound.

When the web material 1 is wound on the winding core 2, the winding core 2 receives the winding pressure. In the case of the winding core 2, the bent portions 5a and 5b of the leaf spring 3 are bent.
It is reinforced so that the winding core 2 can withstand the winding pressure of the web material 1 and is not damaged. Further, the winding pressure of the web material 1 is reduced by the bent portions 5a and 5b of the leaf spring 3.
To the bent portion 5 of the leaf spring 3 by the winding pressure.
The a and 5b are elastically deformed and flattened, and the web material 1 is wound up in that state. Therefore, the restoring force is generated at the elastically deformed bent portions 5a and 5b, and the web material 1 is compressed by the restoring force of the bent portions 5a and 5b.
The web material 1 can be wound up firmly.

After the winding of the web material 1 is completed, when the nut 12 and the tapered cone 6a are removed from the shaft 9, the wound core 2 is released from between the tapered cones 6a and 6b, and the wound product and the wound core 2 are separated. It can be removed from the shaft 9 and removed. Further, when released from between the respective tapered cones 6a and 6b, the tubular leaf spring 3 elastically restores inward in the radial direction, contracts as shown in FIG. 2, and the overlapped portion increases as shown in FIG. As a result, the winding core 2 contracts and its radius decreases. Therefore, the winding core 2 can be removed from the wound product and removed.

Not only the web material 1 having a fixed width but also an elongated material 13 such as a thread, a tape, and a rope can be wound around the winding core 2 as shown in FIG. Therefore, the elongate material 13 can be firmly wound up, and then the winding core 2 can be withdrawn and removed from the wound product. Further, when the web material is slit by the slitter, ear pieces are formed on both side edges of the web material,
Similarly, the ear pieces can be wound around the winding core 2. Therefore, the lugs can be wound up firmly, and then the winding core 2 can be withdrawn and removed from the winding pieces, and the winding pieces can be treated as scrap. Scrap can also be recycled into some material.

FIG. 5 shows another winding core 14. The winding core 14 includes a plastic tube 15 and a cover 16.
The plastic tube 15 is made of polyvinyl chloride and is relatively elastic. The cover 16 is made of a leaf spring,
It is curved with a curvature corresponding to the plastic tube 15. Further, the plastic tube 15 is circumferentially cut off at a fixed angular position, the cut-off portion 17 is covered by a cover 16, and the cover 16 is fixed to the plastic tube 15 on one side 18 of the cut-off portion 17. Furthermore, on the other side 19 of the cut-off section 17, the cover 16 and the plastic tube 15 are superimposed on the cut-off section 17 of the plastic tube 15 in a double-walled manner over at least a certain angular range. This is used as the winding core 14.

Therefore, when the winding core 14 of FIG. 5 is disposed between the tapered cones 6a and 6b of FIGS. 1 and 4 and the tapered cone 6a is pushed in by the nut 12, the winding core 14 is sandwiched between the tapered cones 6a and 6b. And is subjected to the wedge action of the tapered surface 7. Therefore, as shown in FIG. 6, the plastic tube 15 is elastically deformed radially outward and expanded, thereby reducing the overlapping portion of the cover 16 and the plastic tube 15. Therefore, FIG.
Similarly to the winding core 2, the winding core 14 is elastically deformed and expanded by the tapered cones 6a and 6b, and the radius thereof is increased. Therefore, after that, the web material 1,
The other material 13 or ear pieces can be wound around the winding core 14 and can be wound tightly. Further, after the winding is completed, the plastic tube 15 is elastically restored radially inward, whereby the winding core 14 can be contracted and its radius can be reduced. It can be removed from the piece and removed.

As shown in FIG. 7, the plastic tube 15 shown in FIGS. 2 and 5 may be housed in the leaf spring 3 and used as the winding core 20. Then, the winding core 20 is sandwiched between the tapered cones 6a and 6b, and as shown in FIG.
The plastic tube 15 and the leaf spring 3 are elastically deformed radially outward and expanded. Thereby, the winding core 20
Is elastically deformed, expanded, and its radius is enlarged. Thereafter, the web material 1, the other material 13 or the lug is wound around the winding core 20, and after the winding is completed, the winding core 20 is removed from each of the tapered cones 6a, 6a. 6b, whereby the winding core 20 can be elastically restored, contracted and its radius reduced, and the winding core 20 can be withdrawn and removed from the winding product or winding piece.

[0022]

As described above, according to the present invention, the web material 1, the other material 13 or the lugs can be wound around the winding cores 2 and 14, and can be firmly wound. After completion of the take-up, the take-up cores 2, 14 can be withdrawn and removed from the take-up product or take-up piece. There is no need to use a pneumatic expansion take-up shaft, its construction is simple and its cost is low. After the winding cores 2 and 14 have been extracted, they can be used again, which is economical.
The intended purpose can be achieved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is an end view of the winding shaft of FIG. 1;

FIG. 3 is an end view showing a state where the winding shaft of FIG. 2 is expanded.

FIG. 4 is a sectional view showing another embodiment.

FIG. 5 is an end view showing another winding shaft.

FIG. 6 is an end view showing a state where the winding shaft of FIG. 5 is expanded.

FIG. 7 is an end view showing another winding shaft.

FIG. 8 is an end view showing a state where the winding shaft of FIG. 7 is expanded.

[Explanation of symbols]

 2, 14, 20 Take-up core 3 Leaf spring 4 Both side edges of leaf spring 15 Plastic tube 16 Cover 17 Detachment part 18 One side of detachment part 19 The other side of detachment part

Claims (2)

[Claims] 1. A single leaf spring, wherein the leaf spring is tubularly curved in the width direction, and the leaf springs are overlapped in a double wall shape over at least a predetermined angle range from both side edges thereof. Winding core. 2. A plastic tube, which is relatively elastic and is circumferentially cut off at a certain angular position, and a cover covering the cut-off portion, and the cover is attached to the plastic tube on one side of the cut-off portion. A take-up core, which is fixed, and on the other side of the cut-off portion, the cover and the plastic tube are overlapped with each other in a double-walled manner at least over a certain angle range from the cut-off portion.