JPH11171377A - Method and device for winding web - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for winding a web, capable of restraining an accumulator from being enlarged and capable of quickly and stably changing the web winding direction. SOLUTION: In a web winding method for switching the winding of a web wound on a first core mounted on one winding shaft of a turret winding machine 2 provided with two winding shafts 1, 11 and capable of being turned to the winding to a second core mounted on the other winding shaft, the turning direction of the turret winding machine 2 is selected according to the winding direction of the second core before switching the winding of a web 3 from the first core to the second core, the turret winding machine 2 is turned according to the selection, the web 3 is cut on the downstream side of the second core in relation to the web conveying direction after the second core is positioned on the upstream side of the first core in relation to the web conveying direction, the cut part of the web 3 is stuck to the second core, and the web 3 is wound.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for automatically winding a web by using a turret winding machine so that an inner winding and an outer winding can be arbitrarily changed.

[0002]

2. Description of the Related Art Conventionally, there has been known a method of winding a web such as paper or a plastic film, and in particular, an apparatus for automatically switching the winding of a web from a core having a predetermined amount of wound web to a new core. Such an apparatus is described in, for example, Japanese Patent Application Laid-Open No. 57-11747. On the other hand, a photographic light-sensitive material usually has a light-sensitive layer containing silver halide coated on one side of a paper or polyester film support. Depending on the use and purpose of the photographic light-sensitive material finished in a roll shape, the photosensitive surface may be wound inside or outside. Therefore, it is required that the winding direction is wound in the inner winding or outer winding even in the process of manufacturing the photographic light-sensitive material.

[0003] As a method of arbitrarily switching the inner winding and the outer winding in the operating state, there is a method described in Japanese Patent Application Laid-Open No. 4-327451, for example. According to this method, in a device for winding a web around a winder winding core, a web end is guided to an inner winding or outer winding position on the core by a device having two rotating gap rolls, and the web end is labeled. There is known a web take-up device in which winding is performed by arbitrarily switching between inner winding and outer winding in an operating state.

[0004] However, in the above prior art, after cutting the web, the web must be transported in a free state to the new core, and the web can be wound around the new core with high accuracy due to curl or dubble of the web. There is a problem that can not be. Further, while changing the winding direction, the web transfer line must be stopped, and an accumulator as a web storage device is required. In particular, in the case of high-speed operation, there was a problem that the accumulator was enlarged.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and is intended to realize a rapid and stable winding when switching from inner winding to outer winding or from outer winding to inner winding. It is an object of the present invention to provide a web automatic winding method and a device capable of switching directions. Another object of the present invention is to provide a web winding method and a web winding method that do not require an accumulator or can suppress an increase in the size of the accumulator.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a first aspect of the present invention is directed to a first turret winding machine having two winding shafts, the first turret winding machine being mounted on one of the winding shafts. In a web winding method in which a web wound around a core is switched to a second core mounted on the other winding shaft, the web is wound from the first core to the second core. Before switching the winding, the turning direction of the turret winding machine is selected according to whether the winding direction of the second core is the inner winding or the outer winding, and the turret winding machine is turned according to the selection. Then, after the second core is positioned upstream of the first core with respect to the web transport direction, the web is cut downstream of the second core with respect to the web transport direction, and the web is cut. And attaching the portion to the second core and winding the web. .

According to a second aspect of the present invention, in the web winding method according to the first aspect, a pair of rotatable rollers is provided upstream of the turret winder with respect to a web transport direction. In a case where the web is transported so as to pass between the rollers of the pair and the turning direction of the turret winder is changed, the pair of rollers is turned and inverted.

According to a third aspect of the present invention, a rotatable turret winder having two winding shafts and a pair of rotatable turret winders located upstream of the turret winder with respect to a web transport direction. A pair of rollers, cutting means for cutting the web downstream of the take-up shaft of the turret winder with respect to the web transport direction, and pressing the web against a core mounted on the take-up shaft, and cutting the cut web end. A nip roller serving also as an adhesive tape attaching means for attaching the portion to the core.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the web winding method and apparatus according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic view of a web winding device according to the present invention.

The web take-up device 10 comprises a turret take-up device 2 having two take-up shafts 1 and 11 which can be pivoted in both directions, and a turret take-up device 2 upstream of the turret take-up device 2 with respect to the transport direction of the web 3. Pair of rotatable rollers 4 provided on the side
And a cutting means 5 for cutting the web 3 on the downstream side of the winding shaft 1 of the turret winding machine 2 with respect to the transport direction of the web 3, and a nip roller 9 also serving as an adhesive tape attaching means. ing. Cutting means 5 and nip roller 9
Are located on both the left and right.

The turret winding machine 2 includes a turret winding table 6, a turret disk 7, and a rotating shaft 16 of the turret disk 7.
And two guide rollers 21, 2 symmetrically arranged at both ends of the two winding shafts 1, 11 provided at opposing positions with respect to the center of the line connecting the winding shafts 1, 11.
The new core 11a and the old core 1a are detachably attached to the winding shafts 1 and 11, respectively. The turret board 7 is attached to the turret take-up base 6 so as to be rotatable around a rotation shaft 16 provided on the turret take-up base 6. The winding shafts 1 and 11 and the guide rollers 21, 22, 23 and 24 are held by turret plates 7 arranged on both sides thereof.

The steps of cutting the web and attaching it to the core will be described with reference to FIG. In FIG. 1, after a predetermined amount of web is wound on the old core 1a, when replacing the web winding core from the old core 1a to the new core 11a, the web 3 is nip roll 9 and the new core 11a as shown in FIG. The cutting means 5 (for example, a circle cutter) is moved in the width direction of the web 3 to cut the web 3. On the outer periphery of the nip roll 9, an adhesive tape 12 is previously adsorbed by an air suction force with its adhesive surface facing outward.
Then, the nip roll 9 is rotated in the counterclockwise direction as shown by the arrow in the figure, the tip of the web 3 is reversed, and about half of the adhesive tape 12 adsorbed on the nip roll 9 is cut off. And the other half of the adhesive tape 12 is adhered to the new core, and the tip of the web 3 is positioned on the new core 11a. The positioning of the tip of the web 3 with respect to the new core 11a is automatically performed by rotating the nip roll 9 counterclockwise by a predetermined angle. 5, the web cutting position is set in advance.

The roller pair 4 enables the web to be transported in a normal state when the winding direction of the web is changed. The roller pair 4 is attached to both ends of a turret board (not shown). The roller pair 4 is rotated by 180 degrees about the longitudinal center point of the roller pair.
The up and down position is reversed.

Next, a web winding method will be described. For a web in which the coating surface of the web is selected to be inwardly wound or outwardly wound and wound on the core, it is necessary to change the frame after the predetermined length is wound on the core. In this case, the core 1a having taken up a predetermined winding amount is sent to the lower portion of the turret winding device by rotating the turret board, and the other winding shaft 11, on which the core 11a is previously mounted, is moved to the upper portion. (Upstream of the core 1a with respect to the web transport direction). Next, nip roll 9 and new core 11a
Then, the web 3 is sandwiched, and the cutting means 5 cuts the web 3. During this time, the web 3 sent from the previous process
Is generally temporarily stored in an accumulator (not shown). Therefore, the winding of the web 3 is temporarily stopped without stopping the operation of all the lines when the frame is changed, so that the core can be changed and the web 3 can be changed. Web 3
After the nip roll 9 is cut by the cutting means 5,
Then, the adhesive tape prepared on the nip roll 9 having a suction function is pasted on the cut end of the web 3 and the front end of the web 3 is pasted on the new core 11a.

After the work of sticking the tip of the web 3 to the new core 11a is performed, the nip roll 9 cutting means 5 retreats from the new core 11a. In addition, the method of attaching the cut web 3 to the core at the tip end is not limited to the above method, and a method generally used in the art may be used. For example, a method in which a double-sided adhesive tape is pasted to the core in advance may be used, and the design may be changed as appropriate. Further, the winding method of the present invention can switch the core in a continuous operation state without using an accumulator.
In other words, stick the double-sided adhesive tape on the core in advance,
By performing web nip and cutting almost simultaneously,
The core can be switched without stopping winding.

FIGS. 3 (a) to 3 (c) show a normal frame change in which the old core is replaced with the new core without changing the winding direction.
(A)-(c) is a schematic diagram showing an embodiment in which the winding direction is changed and the web transport path is changed from left to right with respect to the new core.

FIG. 3A shows a state in which the web has begun to be wound around the core 14. The core 13 on which the web at the lower part of the turret winding device has been wound by a predetermined amount is removed from the winding shaft by a predetermined operation, and is conveyed to the next step. In FIG. 3B, the turret plate is turned counterclockwise as shown in FIG. 3A as the winding amount of the web 3 started to be wound around the core 14 in FIG.
This shows a state in which the core 14 has been moved to a lower portion of the turret winding device. The web 3 guided by the roller pair 4 is further guided by the guide rollers 21 and 22 to the core by the above-described turning of the turret board 7. When the web take-up amount has reached a predetermined amount at the position shown in FIG. 3B, the web 3 is cut by the operation shown in FIG.
As shown in (c), winding around the new core 15 is started. If the direction of winding the web around the core is the same, the operation of FIG. 3 is repeated.

FIG. 4A shows a state where the web 3 has been wound around the core 14. The core 13 on which the web at the lower part of the turret winding device has been wound by a predetermined amount is removed from the winding shaft by a predetermined operation, and is conveyed to the next step. To change the winding direction, the roller pair 4 is rotated clockwise by 180 ° as shown. Roller pair 4
Is rotated clockwise so that the web can be given the necessary tension when the turret winder is rotated in the opposite direction to change the winding direction in the next core.

As described above, when the winding direction is changed, the turning direction of the turret winder is changed to the opposite direction. At this time, the roller pair 4 is turned by 180 °. The rotation of the roller pair 4 is preferably performed before or simultaneously with the turning of the turret winder. The roller pair 4 may be a free roller or a drive roller. In particular, in the case of a free roller, if the roller pair 4 is turned while the web is being conveyed, there is a risk that the web and the roller may slip and damage the web. It is preferable to rotate the roller pair 4 during the step of attaching the web cutting portion to the web 14 or before the core 14 starts winding the web. When the roller pair 4 is a drive roller, the web and the roller do not slip, so that the web may rotate during the conveyance of the web, and may be used before the turret winder rotates or when the turret winder rotates. The roller pair 4 can be turned at any time.

In FIG. 4B, as the winding amount of the web started to be wound around the core 14 in FIG. 4A increases, the turret board 7 is moved clockwise as shown in FIG. (In a direction opposite to that of the turret winding device), and shows a state in which the core 14 is moved to a lower portion of the turret winding device. The guide roller 2 is rotated by the above rotation of the turret board 7.
1, 22, 23, and 24 also rotate about the rotating shaft 16 (see FIG. 1) together with the turret board 7, and the web 3 guided by the roller pair 4 is further guided in the order of the guide rollers 23 and 24 to the core 14. Reach. When the web take-up amount has reached a predetermined amount at the position shown in FIG. 4B, the web 3 is cut using the web cutting means 5 and the nip roller 9 (see FIG. 1) arranged on the right side of the transport path of the web 3. Is cut and affixed to the core 15, and as shown in FIG. 4C, the core 15 is started to be wound in the reverse direction.

As described above, according to the present invention, when switching the winding direction of the web, before switching the winding of the web from the core (old core) performing the winding of the web to the new core, By turning the roller pair 180 ° in a direction away from the wound web, the web transport path can be switched to a path suitable for the winding direction in which the turret board is to be switched.
The winding direction can be switched by turning by 80 °, and the inner winding or the outer winding can be arbitrarily switched and wound without stopping the operation of all the lines. The present invention also makes it possible to quickly switch between the inner winding and the outer winding, thereby preventing the accumulator from being enlarged.

The illustrated pair of rotatable rollers, the web cutting device, and the turret winder are merely examples, and the present invention is not limited to these shapes, and the design can be changed as appropriate.

[0023]

According to the first aspect of the present invention, the web wound on the first core mounted on one of the winding shafts of the rotatable turret winder having two winding shafts. In a web winding method for switching the winding to a second core mounted on the other winding shaft, before switching the web winding from the first core to the second core,
According to whether the winding direction of the second core is the inner winding or the outer winding, the turning direction of the turret winder is selected, and the turret winder is turned according to the selection, and the turret winder is turned in the web transport direction. On the other hand, after the second core is positioned on the upstream side of the first core, the web is cut on the downstream side of the second core in the web transport direction, and the cut portion of the web is connected to the second core. Because the web is pasted and wound, the web tip is positioned before cutting, and cut on the downstream side of the new core, so the time required to change the frame can be reduced, regardless of the type and thickness of paper. Web winding can be performed with high accuracy.

According to a second aspect of the present invention, in the web winding method according to the first aspect, a pair of rotatable rollers is provided upstream of the turret winder in a web transport direction, When the web is transported so that the web passes between the rollers of the pair of rollers, and the direction of rotation of the turret winder is changed, the pair of rollers is rotated and inverted, so that the web is wound inside or outside the web. An appropriate tension is applied to the web according to each winding direction, so that the web can be wound smoothly.

According to the third aspect of the present invention, a swivelable turret winder having two winding shafts and a swivelable turret winder located upstream of the turret winder with respect to the web transport direction. Set of roller pairs, cutting means for cutting the web downstream of the winding shaft of the turret winding machine with respect to the web transport direction, and pressing the web against a core mounted on the winding shaft, and cutting the web. A nip roller serving also as an adhesive tape sticking means for sticking the web end to the core is provided, so that the inner winding or the outer winding of the web can be arbitrarily selected in an operation state, and the web is cut before cutting. Positioning of the leading edge and cutting on the downstream side of the new core can reduce the time required to change the frame, making it possible to take up the web accurately regardless of the type and thickness of paper. Kill.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an overall configuration of a web winding device according to an embodiment of the present invention.

FIG. 2 is a schematic view showing cutting and pasting of a web in the embodiment.

FIG. 3 is a schematic diagram showing an example in which a web is changed from an old core to a new core without changing the winding direction in the present invention.

FIG. 4 is a schematic diagram showing an example of changing the winding direction and changing the web from an old core to a new core in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Winding shaft 2 Turret winder 3 Web 4 Roller pair 5 Web cutting means 10 Web winding device 11 Winding shaft

Claims (3)

[Claims] 1. A web wound on a first core mounted on one winding shaft of a revolvable turret winder having two winding shafts, the web being mounted on the other winding shaft. In the web winding method for switching the winding to the second core, the winding direction of the second core is set to the inner winding before the web is switched from the first core to the second core. Select the turning direction of the turret winder according to whether it is the outer core or the outer winding, rotate the turret winder according to the selection, and move the second core in the first direction with respect to the web transport direction.
After the web is positioned upstream of the core, the web is cut downstream of the second core in the web transport direction, and the cut portion of the web is attached to the second core and the web is wound. Web winding method. 2. A turret winder, comprising a pair of rotatable rollers upstream of the turret winder with respect to a web transport direction, and transporting the web so that the web passes between the rollers of the turret winder. 2. The web winding method according to claim 1, wherein when changing the turning direction of the take-up machine, the roller pair is turned and reversed. 3. A turret winder having two winding shafts, a pair of rotatable rollers located upstream of the turret winder in the web transport direction, and a web transport. Cutting means for cutting the web downstream of the winding shaft of the turret winding machine with respect to the direction, pressing the web against a core mounted on the winding shaft, and attaching the cut web end to the core And a nip roller which also serves as an adhesive tape attaching means for applying the adhesive tape.