JPH10212059A - Web winding method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a web winding method and a device making the wound form of the wound web excellent and making the web hard to weave. SOLUTION: A web 10 is wound while being made traverse in a width direction at specified amplitude and in a specified cycle so that the end face shape of the web 10 wound onto a core 16 becomes specified uneven shape. The web 10 is therefore wound being shifted at both end parts, and in case there is thickness unevenness in the width direction, thick parts and thin parts are mutually laminated so as to be able to wind the web uniform in winding pressure and excellent in the wound form. The end face shape is thus formed into the specified uneven shape (serrated shape, for instance) so as to be able to obtain the web of roll shape hard to weave and the web of roll shape suitable for transportation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a web winding method and apparatus, and more particularly to a web having a knurling (knurl) at both ends or one end, a web having uneven thickness, or a web having both of them. And a web winding method.

[0002]

2. Description of the Related Art The outer shape of a web wound on a winding core, that is, the quality of the wound shape, greatly affects the quality value of the web. Therefore, when winding up the web, it is necessary to always wind up the web so that the winding appearance is good. By the way, the quality of a wound web basically depends largely on the properties of the web to be wound. That is,
Winding a web with a small thickness unevenness inevitably results in a web with a good winding shape. However, in the width direction of the web, thickness unevenness (usually, the ears at both ends of the web become thick films) and When winding up a web having a knurling, uneven winding pressure is generated, and the winding appearance is poor. In particular, in the case of such a web, since both ends are wound up in a shape called ear height, the ear is stretched,
May cause ear breaks.

For this reason, various measures have conventionally been taken so that even when a web having a thickness unevenness or a knurling at the ear portion is wound, the wound shape of the wound web becomes good. For example, Japanese Patent Application Laid-Open No. 58-100049 discloses a method in which both ears of a web are cut into a sawtooth shape and wound. In this method, the web is wound while cutting both ears of the web in a saw-tooth shape to prevent the ears from overlapping. Also, JP-A-62-22
Japanese Patent No. 2954 discloses a method of winding a web while traversing the web in the width direction in a form in which a traverse amount is associated with web film forming conditions. In this method, the web is wound up by laminating a thick portion and a thin portion of the web so that the winding pressure becomes uniform as a whole.

[0004]

However, in the method disclosed in Japanese Patent Application Laid-Open No. 58-100049, a step of cutting the ears is required separately, so that the winding device is complicated and large. There is a disadvantage of doing so. In addition, the method disclosed in Japanese Patent Application Laid-Open No. 62-222954 has a drawback that the wound web is displaced and a drawback that the vertical transport becomes difficult.

[0005] The present invention has been made in view of such circumstances, and it is possible to prevent the occurrence of elongation and breakage of the ear when winding the web, and the winding appearance is good and the winding is not easily shifted. Alternatively, it is an object of the present invention to provide a web winding method and apparatus capable of winding a web into a roll shape having a good winding shape and suitable for transportation.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a web winding method for winding a conveyed web around a core to form a web roll. The web or the winding core is wound while being traversed in the width direction of the web at a predetermined amplitude and a predetermined cycle so that an end surface shape has a predetermined uneven shape.

According to the present invention, the web is wound around a core while being traversed in the width direction at a predetermined amplitude and a predetermined cycle, and the end face shape of the roll of the wound web is as follows:
It has a predetermined uneven shape. When determining the end face shape, the end face shape is set to a shape suitable for the purpose, and the end face shape is set to a predetermined uneven shape, thereby preventing winding deviation and improving convenience during transportation.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a web winding method and apparatus according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a side view showing a configuration of a web winding device according to the present invention. As shown in FIG. 1, the web 10 includes a plurality of guide rollers 1 arranged on a transport line.
The sheet is conveyed leftward in the figure while being guided by 2, 12,.... Then, the sheet is wound around the core 16 while being traversed in the width direction at a predetermined amplitude and a predetermined cycle by a traverse device 14 provided in the middle of the transport line.

The traverse device 14 is shown in FIGS.
, Four fixed rollers 18, 18,... Arranged symmetrically, and the four fixed rollers 18, 18,.
And a pair of oscillating rollers 20, 20 arranged in the middle of. The fixed rollers 18, 18,...
Each of the swing rollers 20 is rotatably supported by a swing frame 22 at one end thereof.

The swing frame 22 has one end (left end in the figure) connected to a main body frame (not shown) by a pin 24. A rod of a hydraulic cylinder 26 is connected to the other end of the swing frame 22 by a pin 27. The swing frame 22 swings about the pin 24 by driving the hydraulic cylinder 26, and as a result, the swing rollers 20, 20 swing.

As described above, the swing rollers 20, 20
Swings, the web 10 guided by the swing rollers 20, 20 also moves following the swing of the swing rollers 20, 20. As a result, the web 10 is orthogonal to the transport direction. In the width direction, that is, in the width direction. Incidentally, as shown in FIG.
Is controlled by a control device 28, and swings the swing frames 20, 20 based on a drive signal output from the control device 28.

The operation of the embodiment of the web winding device according to the present invention configured as described above is as follows. The web 10 conveyed from the left in FIG. 1 while being guided by the guide rollers 12, 12,...
It is wound up.

Here, the traverse device 14 drives the hydraulic cylinder 26 so that the swing frame 22 connected to the hydraulic cylinder 26 swings about the pin 24, and the swing frame 22 Swings, the swing roller 2 supported by the swing frame 22
0 and 20 swing. The swing rollers 20, 2
By the swing of the swing roller 20, the web 10 guided by the swing rollers 20, 20 moves following the swing of the swing rollers 20, 20, and as a result, is traversed in the width direction.

As described above, when the web 10 traversed in the width direction is wound around the core 16, the ends thereof are stacked while being shifted from each other (accordingly, the end faces of both ends of the wound web are removed). Since the shape becomes uneven), a web having knurling (knurling) at both ends or one end,
Even when winding up a web having thickness unevenness, or a web having both of them, a thick portion thereof,
Since the thin portions are alternately laminated, the web 10 having a uniform winding pressure as a whole and having a good winding shape can be wound.

For example, when a photographic light-sensitive material is applied to a web having a thickness of 30 to 300 μm, setting the traversing amplitude within a range of 1 to 20 mm effectively winds the web 10. Can be taken. In particular, the set amplitude is the knurling width (5 to 15 mm × 1).
５０50 μm) and uneven thickness of coating thickness (1 to 20 of web thickness)
%), A remarkable effect can be obtained.

As shown in FIG. 3, when the web 10 is traversed and wound with the amplitude (1 to 20 mm) set as described above, the amplitude of unevenness generated on both end surfaces of the wound web 10 is obtained. A (difference between top of mountain and top of valley)
Is the same as the above set value (1 to 20 mm), that is, the amplitude when the web 10 is traversed in the width direction.

The cycle of traversing the web 10 is set so that the cycle B of the unevenness (interval between the unevenness) generated on both end faces of the web 10 wound on the core 16 is in the range of 5 to 200 mm. Then, the web 10 can be effectively wound up. However, more effective web 10
In order to wind up, it is preferable to set the cycle within a small range where the product is not broken or wrinkled.

The amplitude and cycle of the traverse applied to the web 10 are determined according to the type and properties of the web 10 to be wound as described above. Regarding the uneven shape generated on the end face of the taken web, various shapes can be selected according to the purpose. Then, depending on the type of uneven shape generated on the end face of the wound web,
The properties of the rolled web also change.

FIGS. 4 (a) to 4 (c) show typical examples of irregularities formed on the end face of the wound web.
As shown in the figure, as the unevenness of the end face, the unevenness has a sinusoidal shape (shown in FIG. 4A), the unevenness has a sawtooth shape (shown in FIG. 4B), and furthermore, There are various shapes, such as one in which the peaks of the peaks and valleys are flat (FIG. 4C).

Among these illustrated shapes, FIG.
As shown in the figure, when the irregularity is sinusoidal, there is no merit that the winding pressure can be uniformly wound without winding or breaking of the ear when winding, and the equipment cost can be reduced. FIG. 4 (b)
As shown in (1), a sawtooth-shaped unevenness has an advantage in that winding deviation is difficult. Further, as shown in FIG. 4 (c), those having flat peaks and valleys have an advantage that they are suitable for vertical transportation.

When determining the uneven shape of the end face of the web,
A shape suitable for the purpose is selected in consideration of the merits of each shape. When the unevenness of the end face is set to a sinusoidal unevenness as shown in FIG. 4A, the amplitude when the web is traversed may be set as in the following equation.

[0022]

(Equation 1) Here, R _c : radius of the winding core R _o : traverse start diameter P: traverse pitch w: half amplitude _VL : web transport speed h: web thickness t: time As described above, this embodiment is used. According to the web winding method and apparatus described above, the web 10 is traversed in the width direction and wound around the core 16 while the web 10 is displaced, so that a web having a knurling at both ends or one end is wound. Even so, the thick and thin portions are alternately stacked, so that the web 10 with a uniform winding pressure as a whole and a good winding appearance can be wound.

Further, as a result, the winding pressure applied to both ends of the web wound up in a roll shape is dispersed, so that the occurrence of ear extension and the occurrence of ear breakage can be prevented. Furthermore, by making the end face shape of the web wound on the winding core 16 into a predetermined uneven shape, it is possible to prevent a winding deviation and to improve convenience in transportation.

In the present embodiment, the web 10 is traversed in the width direction, so that the end face of the web 10 wound around the core 16 has a predetermined concave-convex shape. By traversing in the axial direction, the end face shape of the web 10 wound on the winding core 16 can also be a predetermined uneven shape. Next, a web winding device according to a second embodiment of the present invention will be described.

The web winding device described in the first embodiment can be similarly applied to winding various types of webs other than the web coated with a photographic material. However, when the type of the web to be wound is changed in the winding device, the guide rollers 12, 12,... For transporting the web 10 must be replaced according to the characteristics of the web to be wound.

Conventionally, an operator manually replaces the guide rollers. In the present embodiment, however, there is provided a guide roller replacement device capable of automatically performing this operation. FIGS. 5 to 7 are a front view, a plan view, and a side view showing the configuration of the guide roller replacement device, respectively. As shown in the drawing, the guide roller replacement device 30 replaces the guide rollers using a two-axis turret. Hereinafter, the configuration of the guide roller replacement device 30 will be described.

Bearing units 34, 34 are provided on the tops of a pair of columns 32, 32 standing upright on a base plate (not shown). This bearing unit 3
The turning shaft 36 is rotatably supported by the reference numerals 4 and 34. A pair of turret plates 38, 3
8 are fixed at predetermined intervals. Bearing portions 40 and 40 are formed at both ends of the turret plate 38, and a pair of guide rollers 12A and 12B are detachably supported by the bearing portions 40 and 40, respectively.

An output shaft of a rotary actuator 44 is connected to one end of the turning shaft 36 via a joint 42, and the turning shaft 36 rotates by obtaining a turning force from the rotary actuator 44. . As the pivot 36 rotates, the turret plates 38, 38 fixed to the pivot 36 also rotate, and as a result, the pair of guide rollers 12A, 12B supported by the turret plates 38, 38 It turns around the turning shaft 36.

As a result, for example, the pivot 36
If rotated by 0 °, the guide rollers 12A, 12B of each other
Can be exchanged, so that the guide rollers 12A and 12B can be exchanged if the upper side in the figure is the use side. Which guide roller is currently used is determined by the following mechanism. 6 and 7
As shown in the figure, a detector 46 is fixed to the output shaft of the rotary actuator 44.
6, a pair of photoelectric sensors 48A, 48B
Is arranged.

Since the detector 46 is fixed to the output shaft of the rotary actuator 44, the detector 46 rotates by the same amount of rotation when the output shaft rotates. Therefore, when the guide roller 12A is located at the use position, the detector 46 is located at a position facing the photoelectric sensor 48A, and when the guide roller 12B is located at the use position, By setting so as to be located at a position facing the photoelectric sensor 48B, it is possible to determine which guide roller is currently used.

That is, which photoelectric sensor 48 is currently used
By determining whether the detector 46 is detected at A and 48B, it is possible to determine which guide roller is being used. The operation of the guide roller changing device 30 configured as described above is as follows.

Guide rollers 12A and 12B suitable for carrying two types of webs are mounted on the turret plates 38 and 38 of the exchange device 30 in advance. Then, a guide roller suitable for the web 10 to be transported is selected and used. Here, for example, when the guide roller 12A side is selected, the guide roller 12A side is positioned at the upper use position in the drawing. Then, when it is necessary to change the type of the web 10 to be wound and to replace the guide roller 12A to be used with the guide roller 12 on the other side, the rotary actuator 44 is driven to rotate the rotating shaft 36 to 18.
Rotate 0 °.

As a result, the positions of the guide rollers 12A and 12B are switched, and the guide rollers are replaced. In this way, by applying the guide roller changing device 30 of the present embodiment to the web winding device of the first embodiment, even if the web to be wound is changed, the winding is performed. The optimal guide roller can be quickly replaced according to the type of web.

In this embodiment, the case where the guide rollers are exchanged in accordance with the type of the web to be conveyed has been described. That is, guide rollers of the same type are mounted on the turret plates 38, 38 in advance so that the guide rollers can be replaced when a failure occurs. Thereby, even if a failure occurs, it is possible to respond quickly.

In this embodiment, the turret plate 3
Although the number of guide rollers that can be mounted on the rollers 8 and 38 is set to two, a configuration in which a plurality of guide rollers can be mounted makes it possible to cope with the transport of more types of webs. Further, in the above embodiment, the type of the guide roller was not particularly mentioned. However, as the guide roller to be used, one having a flat surface, one having a groove formed on the surface, one made of rubber, one having high rigidity, Are selected according to the web to be conveyed.

For example, if the web is slippery (causes slippage), use a grooved or rubber-made web. Conversely, if the web is difficult to slip (cause wrinkles), It is good to use the thing whose surface is flat. When the thickness of the web to be transported is large, a web having a flat surface is used. When the web is thin, a web having high rigidity is preferably used.

[0037]

As described above, according to the present invention,
By winding while traversing the web so that the end face shape of the roll of the rolled web becomes a predetermined uneven shape, at the time of winding, no elongation or breakage of the ear occurs, and the winding appearance is good. In addition, it is possible to obtain a roll-shaped web which is hardly displaced or a roll-shaped web suitable for transportation.

[Brief description of the drawings]

FIG. 1 is a side view showing the configuration of a web winding device according to the present invention.

FIG. 2 is a plan view showing a configuration of a traverse device.

FIG. 3 is an explanatory diagram illustrating a web winding method.

FIG. 4 is an explanatory view illustrating the shape of an end face of a wound web.

FIG. 5 is a front view showing the configuration of a guide roller replacement device.

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is a side view of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Web 12 ... Guide roller 14 ... Traverse device 16 ... Core 28 ... Control device 30 ... Exchange device 38 ... Turret plate

Claims (4)

[Claims] 1. A web winding method in which a conveyed web is wound around a core to form a web roll, wherein the end face of the web roll has a predetermined uneven shape. A web winding method, wherein the web is wound while being traversed in the width direction of the web at a predetermined amplitude and a predetermined cycle. 2. The method according to claim 1, wherein the web is a web coated with a photographic material, and the thickness of the web is 30 to 300 μm. 1-20mm, cycle is 5-200mm
2. The web winding method according to claim 1, wherein the amplitude and period of the traverse applied to the web or the core are set so as to fall within the range of: 3. A web winding device for winding a web conveyed while being guided by guide rollers around a core to form a roll of the web, wherein the web or the core is traversed in the width direction. Means, and control means for controlling the width direction moving means so that the web or the winding core is traversed at a predetermined amplitude and a predetermined cycle, and the end face shape of the roll of the web has a predetermined uneven shape. A web winding device. 4. A plurality of guide rollers are supported by a turret plate, and necessary guide rollers are selectively used by rotating the turret plate according to the type of web to be conveyed. A web winding device as described in the above.