JPS6366053A - Web take-up device - Google Patents

Abstract

PURPOSE:To eliminate generation of flaw and/or wrinkle and loss of products when a web is to be wound on a core, by electrically charging the core in advance, cutting the web aslant with a cutter in the position ahead the core, and then inducing the cut web to the core using a lapper. CONSTITUTION:A prop 24 supports a pair of cores 30a, 30b through a shaft 26 and a rotary arm 28 in such a way that they can be substituted in their positions with each other. If a web 32 is wound on a core 30a fully, the cores 30a, 30b are replaced in their positions to each other. An arm 60 is sunk, and the core 30b is charged by an electrode 44, and a press roll 28 is moved, and the web 32 is contacted with a new core 30b, and at the same time, a lapper 52 is moved to a standby position. Thereafter the web is moved and cut with a cutter 50 to obtain a cut wire in slant condition. The web 32 thus cut and charged is wound on the new core 30b using the lapper 52 consisting of a number of blades 56 protruding from the body 54.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a web winding device, and particularly to an improvement in an automatic continuous web winding device that cuts the web while it is running and sequentially winds it around a new core. Regarding.

[Prior art]

Conventionally, in this type of web winding device, various means have been developed for winding the web around a new core.

First, FIG. 5 shows an apparatus for winding a web around a core by adhesive.

A pair of cores 10a and 10b that can be rearranged forms a web 12.
The core 10a is arranged along the running direction of the core 10a and the winding is finished.
is moved to the unloading side, and a new core 10b is moved forward. A press roller 14 and a cutter 16 are arranged at the new core 10b winding position. The cutter 16 cuts the web 12 behind the new core 10b. The new core 10b is provided with an adhesive part 17 such as double-sided adhesive tape or glue, and the cut end of the web 12 is adhered to this adhesive part 17, and new winding begins. In addition,
An adhesive may be applied to the web 12 side.

However, when such an adhesive winding type device is used, it is troublesome to apply adhesive tape each time a new core is wound. In addition, there are problems such as the adhesive adheres to the web 12, requiring removal work, and resulting in product loss. FIG. 6 shows an apparatus for wrapping the web around a core.

That is, the web 2 is wrapped around a new core 10b using the touch roller 18, air blower, etc., and in this state, the web 12 is cut by the cutter 16, and new wrapping is performed.

This device has a drawback that when the web 12 is wrapped around the core 10b, friction scratches occur due to the speed difference between the web 12 and the core 10b.

Next, FIG. 7 shows an apparatus using a bugle roll.

In this device, a plurality of wrapper rolls 20 are arranged around the new core 10b, and a cutter 16 is arranged in front of the wrapper rolls 20. The front end of the cut web 12 is attached to a wrapper roll 20
is guided to the surface of the core 10b and wound.

In a conventional device using this wrapper roll 20, the length of the wrapper roll 20 is larger than the width of the web 12. Therefore, since the wrapper roll having a long axis is arranged around the core, there is a problem that the structure becomes larger and more complicated. Furthermore, when the web 12 is wound around the core 10b, friction scratches may occur due to the speed difference between the core tab and the web 12.

Furthermore, a device for winding a web using a charging method is also known (for example, Japanese Patent Laid-Open No. 58-220038).

FIG. 8 shows this conventional structure.

That is, for example, a web charging electrode 2 is provided on the outer peripheral side of the core 10b.
2 is provided, and a touch roller 1 is provided in front of the core 10b.
8. A cutter 16 is arranged at the rear. As the web 12 is cut by the cutter 16, the electrode 22 is energized, and the cut web 12 is charged by the electrode 22 and wound around the core 10b.

With this device, no friction scratches occur on the web 12,
A new winding of the web 12 takes place. However, in conventional devices, the web 12 is charged over the entire axial direction. For this reason, high-speed winding may sometimes cause air to get mixed in between the cut winding end of the web 12 and the core 10b, which may cause wrinkles.
There is a problem with high-speed winding attacks.

[Problems to be solved by the invention]

The present invention was made in view of these circumstances, and the present invention can be wound around a new core without causing scratches or wrinkles.
Another object of the present invention is to propose a web winding device that can perform high-speed and reliable winding with a relatively compact configuration without causing product loss.

[Means for solving problems]

In order to achieve the above object, the present invention uses a web winding device that cuts a continuously running web in the middle and winds it around a new core. It is cut obliquely in the width direction in front of a new core, and the tip web is guided toward the core side with a trumpet.

[Embodiments] - Hereinafter, preferred embodiments of the web winding device according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 schematically shows a side configuration of a web winding device according to this embodiment, and FIG. 2 schematically shows a plan configuration.

As shown in FIG. 1 and FIG.
and a pair of cores 30a, 30 via the rotating arm 28.
b is supported so as to be removable in the running direction of the web 32. That is, the web 32 is continuously supplied to the core 30b at the winding position via the guide roller 34 (arrow a).
. When the web 32 is wrapped a predetermined amount, the rotating arm 28
is rotated by a drive device (not shown) (arrow b)
, the core arrangement is changed to the states shown in FIGS. 1 and 2. Note that a pair of tendenzi rolls 36 is provided between each core 30a, 30b so that the arrangement can be changed together with each core 30a, 30b. The tension roll 36 allows the web 32 to extend to a tangential position to a new core 30b when the winding is changed.

A press roll 38 is arranged at the web winding position. This press roll 38 is rotatably attached to a shaft 42 via an arm 40, and has two positions: a position where it rolls into contact with the core 30b (the position indicated by the imaginary line in FIG. 1), and a position where it is separated from the core 30b (the position indicated by the solid line in FIG. 1). position).

Further, the core charging electrode 44 is attached to the tip of an arm 60, and the arm 60 is rotatably attached to a shaft 61. This charging electrode 44 is connected to a charging device 46 via a coiled elastic support wire 48 . As shown in FIG. 2, this charging electrode 44 has a constant length along the core 30b, and has a position close to the core (the position indicated by the imaginary line in FIG. 1) and a position away from it (the position indicated by the solid line in FIG. 1). 1) (arrow f in FIG. 1).

The cutter 50 is provided in front of the core 30b so as to be movable in a direction parallel to the axis of the core 30b (direction of arrow d in FIG. 2). That is, by moving at a constant speed in the width direction of the web 32 during winding replacement, the running web 3
This is for cutting 2. As a result, the web 32 is cut along a cutting line that is inclined in the width direction, as shown in FIG. Then, the cut web 32 is gradually supplied to the core 30b from the cut end side.

A wrapper 52 for wrapping the cut web 32 is provided on the outer peripheral side of the core 30b. The trumpet 52 includes a short cylindrical trumpet main body 54 and a large number of trumpet blades 56 protruding from the trumpet main body 54 toward the inner circumference.

The inner end of the trumpet blade 56 is in sliding contact with the core 30b,
The web 32 is guided into the circumferential gap and supplied to the core 30b. This wrapper 52 is movable in a direction parallel to the axis of the core 30b (direction of arrow e in FIG. 2) (see solid line and imaginary line in FIG. 2).

Next, the operation will be explained with reference to FIGS. 3 and 4.

FIG. 3 shows the state of web cutting and winding.

As mentioned above, the web 32 is wound around the core, and when the web 32 reaches full winding, the arrangement is changed to the state shown in FIGS. 1 and 2. At this time, the arm 60 descends and moves to the position of the imaginary line, and a high voltage is applied to the charging electrode 44 to charge the core.

The press roll 38 is then moved from the solid line position in FIGS. 1 and 2 to the phantom line position in order to bring the web 32 into contact with the new core 30b. At the same time, the wrapper 52 moves from the position shown by the solid line in FIGS. 1 and 2 to the position shown by the imaginary line. This makes it ready for cutting.

Further, the cutter 50 moves as indicated by arrow d in FIG. 2 to cut the web 32. As shown in FIG. 3, since the web 32 is cut while moving in the direction a, the fourth
As shown in the figure, the cutting line B is inclined.

The cut and charged web 32 is wrapped around the core 30b by a wrapper 52 as shown in FIG.

When the winding switching is completed as described above, the charged electrode 4
4. The press roll 38, cutter 50, wrapper 52, etc. return to the positions indicated by solid lines in FIGS. 1 and 2, and return to the standby state for the next switching.

According to the above embodiment, automatic winding is possible with only the end side of the web 32 in close contact with the core 30b.

Therefore, charging electrode 44 and wrapper 52 are connected to web 3
2, the width of the apparatus can be made smaller and more convenient. Furthermore, by using the charging method and the wrapping method together, the reliability of web winding can be improved.

Moreover, the adhesive method eliminates unnecessary work such as removing adhesive material, which is required in conventional devices, and also prevents product loss.

Furthermore, the web 32 is completely tightly wound around the core 30b by static electricity, and the tightly wound part is formed in a part of the width direction of the web 32, so there is no wrinkles and it is suitable for high-speed winding. Of course, the present invention is not limited to the configuration of the embodiment described above. For example, a trumpet roll may be used instead of the trumpet blade.

Furthermore, various types of wire or needle-like materials can be used as the charging electrode, and various types of running type materials such as a loaf-ri-caft or a razor cutter can be used as the cutter.

Further, when using a trumpet blade, a low reactor unique type or a spring type type can be used as a means for adhering to the core.

〔Effect of the invention〕

As explained above, according to the web winding device of the present invention, the web is cut obliquely in the width direction in front of the core, the tip of the cut core is brought into close contact with the pre-charged core, and the web is can be reliably wrapped around the core with a short wrapper corresponding to the charged part. In addition, winding can be performed at high speed without causing scratches or wrinkles, and product loss can be prevented, and the device configuration can be made smaller and simpler.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of the present invention, and FIG. 2 is a side view showing one embodiment of the present invention.
3 is an explanatory view of the operation of the above embodiment, FIG. 4 is a view showing a cut web, and FIGS. 5 to 8 are side views showing different conventional examples. 30a, 30b--core, 32--web,
38... Press roll, 44... Charging electrode,
52...Trumpet.

Claims (1)

[Claims] A web winding device that cuts a continuously running web in the middle and automatically winds it onto a new core uses a cutter that cuts the web to be wound at an angle in the width direction before the new core, and a cutter that cuts the web to be wound in the width direction before the new core. a charging electrode that charges over a predetermined width;
A web winding device comprising: a wrapper that guides the charged tip of the web to a new core.