JPH0551154A - Winding device - Google Patents

Abstract

PURPOSE:To enable the tight winding in a roll body even at the time of winding a wide web by disposing the outer end parts of a touch roll pressed first to the roll body wound onto a winding shaft in such a way as to exist inside the outer end parts of a touch roll pressed afterwards. CONSTITUTION:Plural touch rolls 3, 4 are pressed to a winding shaft 1 to wind a banded body 2. The outer end parts 3a, 3b of the touch roll 3 pressed first to the roll body 2 wound onto the winding shaft 1 are disposed in such a way as to exist inside the outer end parts 4a, 4b of the touch roll 4 pressed afterwards. Even at the time of winding a wide web, the wound roll body can be thereby wound tightly, and the dislocation of the roll end face and the generation of deformation such as lateral creases are reduced remarkably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, photographic film,
The present invention relates to a winding device for a photographic light-sensitive material such as photographic paper and a belt-shaped body such as a magnetic tape.

[0002]

BACKGROUND OF THE INVENTION By using a winding device for winding a strip while pressing a touch roll onto the outer periphery of a winding shaft, the winding condition can be tightly tightened, and a beautifully aligned roll can be obtained with no end face deviation. Further, it is known that there is an excellent effect that the outer diameter is made uniform, the winding runout is corrected, and a perfect circle can be wound. Therefore, the winding device is provided with a touch roll.

Various proposals have also been made for this touch roll (Japanese Patent Laid-Open Nos. 60-157441 and 62-62).
No. 36261, No. 61-62744,
Japanese Utility Model Publication No. 62-96501, Japanese Utility Model Publication No. 62-9650.
No. 2, Japanese Utility Model Laid-Open No. 62-168050). However, as the band to be wound becomes wider, the wound band (roll) is loosely tightened, the end face of the roll is displaced, and horizontal wrinkles and vertical wrinkles are more likely to occur. In the winding device proposed up to now, the winding result of a wide band (for example, a width of 500 mm or more) is not satisfactory.

[0004]

DISCLOSURE OF THE INVENTION As a result of earnestly studying the above-mentioned problems, the present inventor has found that the winding occurred when the photographic light-sensitive material such as photographic film and photographic paper and the belt-like body such as magnetic tape became wide. Problems such as loose tightening, deviation of the roll end surface, and deformation such as horizontal wrinkles are more than necessary in the widthwise central portion between the strips to be wound, especially between the strips. It was clarified that the air was often left behind and was caused by this. Then, as a result of continuing further research, when the strip becomes wide, when the air existing between the strips is pushed out by one touch roll, Even if the air located near the outside can be pushed out, the air located on the inside (center side) will get over this before being pushed out, and as a result I noticed that air was left in between. In particular, since the touch roll is usually supported at both ends thereof, the longer the surface length, the greater the bending, and the smaller the pressing force at the central portion, and the more difficult the air is pushed out. Therefore, instead of trying to push out the air at one time, first, the air at the central position is pushed out to the outside by a roll with a short deflection and a short surface length (with this, the air located outside the Even if the strip becomes wider, air will be caught more than necessary between the strips if the air is pushed out to the outside. Loosening the winding,
It was presumed that there would be no problems such as displacement of the roll end face and deformation such as horizontal wrinkles.

Therefore, based on such prediction, a winding device having a structure in which a plurality of touch rolls are provided, and the touch roll that is first pressed against the band to be wound only corresponds to the central side is assembled. When a wide strip was wound up, it was better than expected.
The present invention has been made on the basis of such knowledge, the object of the present invention, even when winding a wide band-shaped body, the winding of the wound band-shaped body (roll body) is hard,
It is an object of the present invention to provide a technique in which the end face of a roll is not displaced and deformation such as horizontal wrinkles is significantly reduced.

An object of the present invention is to provide a winding device for winding a strip-shaped body by pressing a plurality of touch rolls on a winding shaft, the strip-shaped body being wound on the winding shaft. It is achieved by a winding device, characterized in that the touch roll is arranged so that the outer end of the touch roll pressed against the inner side is inside the outer end of the touch roll subsequently pressed against. ..

That is, the outer end of the touch roll, which is pressed first against the strip wound on the winding shaft, is arranged inside the outer end of the touch roll, which is subsequently pressed. By doing so, the surface length is substantially shortened and the deflection is reduced, and pressure may be applied to the necessary parts with certainty. As it is pushed out to the outside, the wound band-shaped body (roll body) is tightly wound, the end face of the roll is not displaced, and further, deformation such as horizontal wrinkles does not occur.

The number of touch rolls provided in the winding device of the present invention may be two or more, and may be three, four, five, or more, and first come into contact with the wound strip. It suffices that the touch roll is located at the central portion and that the touch roll from the rear comes into contact with the outside of the touch roll without fail. The thickness of the air layer between the strips wound by such a winding device is always about 0.1 to 0.7 μm, and more preferably about 0.2 to.
It is preferable that the pressing of the touch roll is controlled so as to be about 0.5 μm.

The thickness (t) of the air layer is determined by winding the roll body.
From the length (l), the number of turns (n), and the core diameter (D), t = (l
/ Nπ-D) / n, and the specific winding length (l₁) From
Specific length (l₂) (Corresponding number of turns n₁~ N₂) Then,
t = (l₂/ N₂-L₁/ N ₁) / Π (n₂-N₁)When
Become. Also, as the material of the touch roll, steel or
Aluminum alloy, etc., NR, SBR, EP on the outside
Use rubber materials such as DM, urethane rubber and silicone rubber
It is common to use different materials if necessary.
The rolls can also be used in combination with each other.

[0010]

1 to 3 show a first embodiment of a winding device according to the present invention. FIG. 1 is a perspective view of essential parts, FIG. 2 is a side view, and FIG. 3 is a front view. In each drawing, A is a winding device, 1 is a winding shaft having a diameter of 300 mm and length is 1200 mm, 2 is a width of 500 mm or more, for example 1000 mm, thickness of 50 μm or less, which is wound around the winding shaft 1 at a tension of 7 kg / width. For example, 1
A magnetic tape in which a magnetic coating film having a dry thickness of 4 μm is provided on a polyester film having a thickness of 5 μm, and is wound around the winding shaft 1 at a speed of 200 m or more per minute, for example, 300 m.

Reference numeral 3 is a rubber first touch roll having a diameter of 120 mm and a length of 400 mm. This first touch roll 3 is 25 to 35 kg / in the widthwise central portion of the winding shaft 1.
It is arranged to be pressed by the force of the width (gradual increase from the beginning to the end of the winding). 4 is 120m in diameter
The second touch roll 4 made of rubber has a length of 1100 mm and a length of 1100 mm.
It is arranged so as to be pressed by a force of 70 Kg / width (gradual increase from the initial stage to the final stage of winding). Naturally, the touch roll having this surface length has a bend, but the pressing force is really required at both ends, and in that sense, there is no problem.
The outer ends 4a and 4b of the second touch roll 4 are the first
It is arranged so as to be positioned outside the outer ends 3a and 3b of the touch roll 3, and so that the second touch roll 4 is pressed against the magnetic tape 2 after the first touch roll 3 is pressed against the magnetic tape 2. ing.

Although not shown, the contact positions (angles) of the first touch roll 3 and the second touch roll 4 with respect to the winding shaft 2 can be adjusted independently or in conjunction with each other. ing. With the above structure, the average thickness of the air layer between the wound magnetic tapes 2 is about 0.2 to 0.5 μm during the winding operation of the wide magnetic tape 2. The air between the wound magnetic tapes 2 is not too much, and there is no large amount of air wound in a part of the wound magnetic tapes 2. The roll end face did not shift, and horizontal wrinkles and vertical wrinkles did not occur.

4 and 5 show a second embodiment of the winding device according to the present invention. FIG. 4 is a side view of the main part and FIG. 5 is a front view. In this embodiment, the second touch roll in the first embodiment is divided into three parts, and the one located at the center is removed. In addition, the second embodiment has a feature that the pressing force can be surely applied to a necessary portion because the surface length of the second touch roll is shorter than that of the first embodiment. Since other basic technical ideas are the same, detailed description will be omitted. The length of the second touch roll 4 in this embodiment is 350 mm,
Each of the first touch roll 3 and the second touch roll 4 is about 1
Overlapping in the axial direction over about 0 mm.
This ensures that the pressing force can be applied to the entire width of the strip.

The pressing force of the second touch roll 4 is
Each is 20 to 25 kg / width (gradual increase from the initial stage to the final stage of winding). Then, even in the present embodiment, the same features as those in the first embodiment are exhibited. 6 and 7
Shows a third embodiment of the winding device according to the present invention, FIG. 6 is a side view of a main part, and FIG. 7 is a front view.

In the present embodiment, the length of the second touch roll 4 in the second embodiment is further shortened so that the second touch rolls 4 and 4 can be made closer to the first touch roll 3 side as understood from FIG. It is a close thing. That is, in the first and second embodiments, there is a portion where the first touch roll 3 and the second touch roll 4 overlap in the axial direction, so there is a limit even if they are brought close to each other. In the present embodiment, the first touch roll 3 and the second touch roll 4 can be brought as close to each other as possible. In this case, there is a portion to which the pressing force is not applied at the boundary between the first touch roll 3 and the second touch roll 4, but the second touch roll 4 may be placed in the first On the contrary, when it is separated from the touch roll 3, it may be difficult for air to escape, so it is also necessary to consider such a mode.

FIG. 8 is a side view of the essential parts showing a fourth embodiment of the winding device according to the present invention. In this embodiment, the magnetic tape 2 is wound around the winding shaft 1 to some extent, and then the first touch roll 3 is brought into contact with the magnetic tape 2. Since it is similar to the example, detailed description is omitted. FIG. 9 is a side view of the essential parts showing a fifth embodiment of the winding device according to the present invention.

In this embodiment, the positions of the first touch roll 3 and the second touch roll 4 are taken into consideration so that the weight of the first touch roll 3 and the second touch roll 4 does not influence the winding control. Since the other technical ideas are the same as those of the above-described embodiment, detailed description will be omitted.
FIG. 10 is a side view of the essential parts showing a sixth embodiment of the winding device according to the present invention.

In this embodiment, the magnetic tape 2 is the first
The first touch roll 3 comes into contact with the magnetic tape 2 when the first touch roll 3 comes into contact with the touch roll 3 and then begins to be taken up by the take-up shaft 1. Since they are similar, detailed description will be omitted. However, the width and properties of the strip are
It is appropriately used depending on the winding speed and the like.

[0019]

[Effect] The winding device according to the present invention is a winding device that winds a strip-shaped body by pressing a plurality of touch rolls onto the winding shaft, and the strip-shaped body is wound around the winding shaft. Since the touch roll is arranged so that the outer end of the touch roll pressed first is present inside the outer end of the touch roll pressed subsequently, the strip to be wound is wide. Even if it is a thing, there is not too much air between the wound strips, and there is no such thing as a large amount being caught in a part, and the winding of the wound strip is hard, Moreover, the end faces do not shift, and the wrinkles can be neatly wound so that deformation such as horizontal wrinkles does not occur, and the quality of the wound tape such as magnetic tape is uniform and stable. Suitable for transportation and storage of For example processing such as slitting has features such as very easily.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a first embodiment of a winding device.

FIG. 2 is a side view of the essential parts of the first embodiment of the winding device.

FIG. 3 is a front view of the main parts of the first embodiment of the winding device.

FIG. 4 is a side view of essential parts of a second embodiment of the winding device.

FIG. 5 is a front view of the main parts of a second embodiment of the winding device.

FIG. 6 is a side view of the essential parts of a third embodiment of the winding device.

FIG. 7 is a front view of the main parts of a third embodiment of the winding device.

FIG. 8 is a side view of the essential parts of a fourth embodiment of the winding device.

FIG. 9 is a side view of the essential parts of a fifth embodiment of the winding device.

FIG. 10 is a side view of the essential parts of a sixth embodiment of a winding device.

[Explanation of symbols]

 A winding device 1 winding shaft 3 first touch rolls 3a, 3b outer end of first touch roll 4 second touch rolls 4a, 4b outer end of second touch roll

Claims (1)

[Claims] 1. A winding device for winding a band-shaped body by pressing a plurality of touch rolls on a winding shaft, wherein the touch is first pressed against the band-shaped body wound on the winding shaft. A winding device, wherein the touch roll is arranged such that the outer end of the roll is inside the outer end of the touch roll to be pressed thereafter.