TW201343348A - Film cutting method and film cutting system - Google Patents

Abstract

This film cutting method comprises winding off a film (F) from a bulk roll (7) around which a roll of the film (F) has been wound, conveying the film (F) to a set cutting region (AR1) on a path of conveyance of the film (F), calculating a tilt angle (theta) of an edge of the film in the cutting region (AR1) in relation to the direction of conveyance of the film (F), adjusting a cutting angle (alpha) in relation to the direction of conveyance of the film (F) on the basis of the calculated tilt angle (theta), and cutting the film (F) in the cutting region (AR1) at the adjusted cutting angle (alpha).

Description

Film cutting method and film cutting system

The present invention relates to a film cutting method and a film cutting system.

There has been a conventional method of winding up a film from a roll paper roll in which a film is wound into a roll, and cutting the film which is taken up (for example, refer to Japanese Laid-Open Patent Publication No. 2011-57336).

In such a device, a film is taken up from a roll paper roll, and the film which is taken up is supported, guided, and conveyed by a conveyance roller or the like. At this time, when the winding attitude of the film on the winding roller is not uniform at the edge (hereinafter referred to as the edge) in the width direction of the film, or the thickness of the film is not uniform, the film travels with the change of the edge position (below) Said snake line).

Further, in general, when the film is cut, the cutting direction of the film is set so as to form a desired angle with respect to the conveyance direction of the film. At this time, if the film does not meander, the film is cut in a state where the edge line of the film is parallel to the conveyance direction. However, when the film is meandered, the film is cut in a state where the edge line of the film is obliquely shifted from the conveyance direction. Therefore, when the film is cut in the direction in which the film is conveyed, it may be difficult to accurately cut the film in the direction of the object.

The present invention has been made in view of such circumstances, and an object thereof is to provide a film cutting method and a film cutting system which can cut a film accurately in a direction of purpose.

In order to achieve the foregoing object, the film cutting method of the first aspect of the present invention is Rolling the film into a roll-shaped roll paper roll to wind up the film, and transporting the film to a cut region set on the conveyance path of the film (first step); calculating the edge pair of the film in the cut region An inclination angle of the conveyance direction of the film (second step); adjusting a cutting angle of the film in the conveyance direction according to the calculated inclination angle, and cutting the film in the cutting region by the adjusted cutting angle ( The third step).

In the film cutting method according to the first aspect of the present invention, when calculating the inclination angle of the edge of the film (second step), it is preferable to detect the position of the edge at a plurality of the conveyance directions, and according to the plural The relative positional relationship of the edge detected is detected, and the aforementioned inclination angle at the edge of the cutting region is calculated.

In the film cutting method according to the first aspect of the present invention, when the inclination angle of the edge of the film is calculated (second step), it is preferable to detect the position of the edge in two of the conveyance directions, and detect the position based on the edge. The average inclination direction of the edge between the positions of the two edges is calculated, and the inclination angle of the edge of the cutting area is calculated.

In the film cutting method according to the first aspect of the present invention, when calculating the inclination angle of the edge of the film (second step), at least the position of the edge of the plurality of points is preferably detected at the cutting area. The position of the edge on the upstream side in the direction and the position of the edge on the downstream side in the conveyance direction.

Further, in order to achieve the above object, a film cutting system according to a second aspect of the present invention includes: a conveying device that winds the film from a roll paper roll that winds a film into a roll shape, and conveys the film to the foregoing a cutting region on a conveyance path of the film; and a control device that calculates an inclination angle of the edge of the film in the conveyance direction of the film in the cutting region, and controls the cutting of the film in the conveyance direction according to the inclination angle Angle; and cut The breaking device cuts the film in the cutting region by the cutting angle controlled by the control device.

Preferably, the film cutting system according to the second aspect of the present invention includes an image capturing device that captures an image of the edge at a plurality of locations in the conveyance direction, and the control device is configured according to the edge of the plurality of images captured by the image capturing device. The image detects the edge position of the plurality of points, and calculates the tilt angle of the edge of the cut region based on the relative positional relationship of the edge detected at the plurality of points.

In the film cutting system according to the second aspect of the present invention, the control device preferably detects the position of the edge of the two places according to the image of the edge of the two positions captured by the image capturing device, according to the detected position 2 The average inclination direction of the edge between the positions of the edge is calculated, and the inclination angle of the edge of the cutting area is calculated.

In the film cutting system according to a second aspect of the present invention, it is preferable that the image capturing device captures at least an image of the edge of the cutting region on the upstream side in the conveying direction and an image of the edge of the cutting region on the downstream side in the conveying direction. .

In the film cutting system according to a second aspect of the present invention, the cutting device preferably includes: a cutting portion that cuts the film; and a guiding portion that guides the cutting portion along a cutting direction of the film; The guide portion is rotationally driven in a plane parallel to the film in accordance with the cutting angle controlled by the control device.

According to the present invention, it is possible to provide a film cutting method and a film cutting system which can precisely cut a film in the direction of the object.

1‧‧‧Film cutting system

2‧‧‧Transportation device

3‧‧‧cutting mechanism

3A‧‧‧Intermittent Transport Department

4‧‧‧Transport conveyor

5‧‧‧ Moving out of the agency

6‧‧‧Control device

6a‧‧‧Operation Processing Department

6b‧‧‧Memory Department

7‧‧‧Roller roller

8‧‧‧ reel

22‧‧‧Support roll

23‧‧‧Floating roller

23a‧‧‧Axis

31‧‧‧First cut-off device

32‧‧‧Second cutting device

33‧‧‧First camera

34‧‧‧Second camera

35‧‧‧ Third camera

311‧‧‧ Cutting Department

312‧‧‧Guidance Department

AR1‧‧‧ cut area

AR2‧‧‧ cut area

CP1, CP2‧‧‧ center point

EP1, EP2‧‧‧ intersection

F‧‧‧film

F1‧‧‧one film

H1, H2‧‧‧ distance

L1‧‧‧ first cut direction

L2‧‧‧Second cut direction

‧‧‧‧ cut angle

Θ‧‧‧ tilt angle

The first drawing shows a schematic view of a film cutting system according to a first embodiment of the present invention.

The second drawing shows a state in which the film is cut by the cutting device according to the first embodiment of the present invention.

Fig. 3A is a view showing the operation of the cutting mechanism according to the first embodiment of the present invention.

Fig. 3B is a view showing the operation of the cutting mechanism according to the first embodiment of the present invention.

Fig. 4A is a view showing an image of an edge taken by the photographing apparatus of the first embodiment of the present invention.

Fig. 4B is a view showing an image of an edge taken by the photographing apparatus of the first embodiment of the present invention.

Fig. 5 is a perspective view showing the configuration of a cutting device according to a first embodiment of the present invention.

Fig. 6 is a flow chart showing a film cutting method according to the first embodiment of the present invention.

Fig. 7A is a view showing the operation of the cutting mechanism according to the second embodiment of the present invention.

Fig. 7B is a view showing the operation of the cutting mechanism according to the second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments.

In addition, in all of the following drawings, each component is formed in a pattern to be recognizable, and therefore the size and ratio of each component are different from those of the actual person. In the following description and the drawings, the same or equivalent elements are denoted by the same reference numerals, and the description thereof will not be repeated.

In the following description, the XYZ orthogonal coordinate system is used as needed, and the positional relationship of each component will be described with reference to the XYZ orthogonal coordinate system. In the present embodiment, the width direction of the long film is set to the X direction, and the direction orthogonal to the X direction in the film plane (the conveyance direction of the long film) is set to the Y direction, and is orthogonal to the X direction and the Y direction. The direction is set to the Z direction.

(First embodiment)

Fig. 1 is a schematic view showing an example of a film cutting system according to a first embodiment of the present invention.

The film cutting system 1 shown in Fig. 1 cuts a strip-shaped film (hereinafter simply referred to as "film"). In the present embodiment, the film cutting system 1 is configured by cutting a strip-shaped film to obtain a single-piece film of a predetermined size (hereinafter referred to as "single film"). In addition, the film is not particularly limited as long as it has a flexible strip-shaped film, and various films can be used. In the present embodiment, a polarizing film is used as an example.

Further, the polarizing film which is cut by the film cutting system 1 is not particularly limited, and a known polarizing film is exemplified. The polarizing film may be a polarizing film which is usually a long strip (for example, a transporting length of the polarizing film is 10 m or more), but may be a short strip (for example, a transporting length of the polarizing film is 2 m or more and 10 m or less), or A polarizing film having a plate shape (for example, a length of a polarizing film in a conveyance direction of 10 cm or more and 2 m or less).

As shown in the first figure, the film cutting system 1 continuously winds out the film F from the paper roll roller 7, and cuts it into a single piece of a predetermined length in the cutting area AR1 set on the conveyance path, and then carries it out to the carry-out mechanism 5 .

The film cutting system 1 includes a conveyance device 2, a cutting mechanism 3, an intermittent conveyance unit 3A, a conveyance conveyor 4, a carry-out mechanism 5, and a control device 6.

The paper roll 7 winds up the strip-shaped film F on the reel 8 and accumulates. The spool 8 is rotatable by being connected to a driving device such as a motor. For example, the reel 8 is rotationally driven in the clockwise direction in the drawing, whereby the film F is continuously unwound to the cutting area AR1 on the conveyance path.

The conveying device 2 includes a plurality of guide rolls 21 that form a conveyance path of the film.

In addition, in the following description, the area or position close to the conveyance path start point (the paper roll 7) is referred to as the upstream side (upstream side in the conveyance direction) at an arbitrary position on the conveyance path, and is close to the end of the conveyance path. The area or position of the (unloading mechanism 5) is referred to as the downstream side (the downstream side in the conveying direction).

A support roller 22 is provided at a downstream end of the conveying device 2 and the cutting mechanism 3 in the conveying direction. The film F is sent to the cutting area AR1 by the rotation of the support roller 22.

Further, the conveying device 2 is provided with a floating roller 23 . The floating roller 23 is supported by a rocking direction centering on the shaft 23a as indicated by an arrow D as shown. When the floating roller 23 rotates around the shaft 23a, the conveyance path becomes long, and even if the film F is stopped while the cutting region AR1 is stopped, the film F can be continuously conveyed on the conveying device 2, and the film F can be continuously absorbed. The amount of feed.

The cutting mechanism 3 includes a cutting device (the first cutting device 31 and the second cutting device 32) that cuts the film F in the cutting region AR1, and an imaging device that captures the edge image of the film F in the conveyance direction ( The first imaging device 33 and the second imaging device 34).

The cutting area AR1 on the conveyance path is set to be substantially horizontal. As shown in the first figure, in the cutting area AR1, two cutting devices are disposed at intervals from the upstream side toward the downstream side in the conveying direction of the film F (from the left side to the right side in the first drawing) (first The cutting device 31 and the second cutting device 32). This interval is equal to the length of the single film F1 obtained after the film F is cut.

That is, the film cutting system 1 of the present embodiment is thin as shown in the second figure. The film F is simultaneously cut at two places of the first cutting device 31 and the second cutting device 32, and the two single-piece films F1 are cut and conveyed in one cutting operation. In the second drawing, the symbol V1 is a direction in which the film F is cut by the first cutting device 31 (hereinafter referred to as a first cutting direction). The symbol V2 is a direction in which the film F is cut by the second cutting device 32 (hereinafter referred to as a second cutting direction).

Further, a absorbing table (not shown) is disposed in the cutting region AR1, and includes a film F that absorbing and holding the entire surface of the cutting region AR1.

The intermittent conveyance unit 3A intermittently conveys the single-piece film F1 cut from the film F to a predetermined length. In addition, the "intermittent conveyance" means that the process of transporting the single-piece film F1 includes temporarily stopping the single-piece film F1. The intermittent conveyance unit 3A includes a plurality of rollers that intermittently convey the single film F1 to the conveyance conveyor 4 on the downstream side.

The conveyance conveyor 4 is arrange|positioned on the downstream of the intermittent conveyance part 3A. The conveyance conveyor 4 receives the single film F1 intermittently conveyed from the intermittent conveyance part 3A, and carries it continuously. In addition, the "continuous conveyance" is a process of transporting the single-piece film F1 without stopping the single-film F1, and continuing to convey and discharge the single-piece film F1. The conveyance conveyor 4 is set so that the length of the two sheets of the single-piece film F1 sent out from the intermittent conveyance part 3A by the cutting|disconnection mechanism 3 can be hold|maintained by the predetermined clearance plane.

The carry-out mechanism 5 is configured by a roller conveyor that is continuously disposed below the terminal of the conveyance conveyor 4. At the beginning end of the carry-out mechanism 5, a tray 15 for recovering the single film F1 dropped from the conveyance conveyor 4 is disposed.

The control device 6 of the present embodiment includes a computer system. This computer system includes an arithmetic processing unit 6a such as a CPU, and a storage unit 6b such as a memory or a hard disk. The control device 6 of the present embodiment includes an interface that can perform communication with an external device of the computer system. The control device 6 can also be connected to an input device that can input an input signal. The aforementioned input device includes an input device such as a keyboard and a mouse. Or a communication device that can input data from an external device of the computer system.

The control device 6 may include a display device such as a liquid crystal display that displays the operation state of each part of the film cutting system 1, and may be connected to the display device.

An operating system (OS) for controlling the computer system is installed in the memory unit 6b of the control device 6. The memory unit 6b of the control unit 6 records a program for causing each unit of the film cutting system 1 to perform a process for accurately transporting the film F by controlling the arithmetic processing unit 6a to control each unit of the film cutting system 1. The arithmetic processing unit 6a of the control device 6 can read various pieces of information including the program recorded in the storage unit 6b. The control device 6 may also include a logic circuit such as an ASIC that performs various processes required for control of each unit of the film cutting system 1.

Further, when the film is taken up from the roll paper roll and the film which is rolled up is supported, guided, and conveyed on a conveyance roller or the like, the winding posture of the film on the roll paper roll is irregular at the edge or the film thickness When it is uneven, it will cause the film to snake. In the film meandering state, when the cutting direction of the film is set so as to form a desired angle with respect to the conveyance direction of the film, the film is cut in a state where the edge line of the film is obliquely shifted from the conveyance direction. Therefore, in the case where the film is cut on the basis of the conveyance direction of the film, it may be difficult to accurately cut the film in the intended direction.

Therefore, in the present embodiment, the film cutting system 1 includes a conveying device 2 that winds the film F from the winding roller 7, and conveys the film F to the cutting region AR1 set on the conveyance path; The apparatus 6 calculates the inclination angle of the film F edge in the cutting area AR1 with respect to the conveyance direction of the film F, and controls the cutting angle of the film F in the conveyance direction according to the calculated inclination angle; and the cutting devices 31 and 32, The film F is cut in the cutting region AR1 by the cutting angle controlled by the control device 6. Thereby, the film F can be precisely cut in the direction of the object.

The third A diagram and the third B diagram show the operation of the cutting mechanism 3 of the present embodiment. (Explanation of the operation of the first cutting device 31 and the second cutting device 32). The third A diagram shows a state before the first cutting device 31 and the second cutting device 32 are respectively rotated. The third B diagram shows a state in which the first cutting device 31 and the second cutting device 32 are respectively rotated.

Further, in the third A diagram and the third diagram B, the symbol Ly is a line parallel to the conveyance direction (Y direction) of the film F. The symbol θ is the inclination angle of the edge of the film F to the line Ly. In addition, the film F is illustrated by a two-dot chain line on the expedient.

In the third B diagram, the symbol L1 is a line parallel to the longitudinal direction of the first cutting device 31. The symbol L2 is a line parallel to the longitudinal direction of the second cutting device 32. The angle formed by the symbol α line Ly and the line L1 (line L2).

In the third A map and the third B graph, the state in which the film F is meandered in the cut region AR1 is displayed.

As shown in FIG. 3A, the first cutting device 31 and the second cutting device 32 are disposed apart from the conveyance direction (Y direction) of the film F by a predetermined distance. Further, the distance between the first cutting device 31 and the second cutting device 32 can be appropriately changed in accordance with the size (length in the Y direction) of the single film F1 obtained by cutting the film F.

The first imaging device 33 and the second imaging device 34 are disposed apart from the transport direction (Y direction) of the film F by a predetermined distance. The first imaging device 33 is disposed on the upstream side of the cutting area AR1 (on the upstream side of the first cutting device 31) in the vicinity of one end of the first cutting device 31. The first imaging device 33 captures an edge image of the film F on the upstream side of the cut region AR1. Further, the second imaging device 34 is disposed on the downstream side of the cutting region AR1 (on the downstream side of the second cutting device 32) in the vicinity of the position at which the end portion on the downstream side of the film F is sucked by the suction device (not shown). (Set near the suction position on the transport path). The second imaging device 34 captures the downstream side of the cut-off area AR1 Edge image of film F.

In this manner, the cut region AR1 is set between the first imaging device 33 and the second imaging device 34.

The control device 6 detects the edge position of the film F at two places according to the film F edge image of the film taken by the first image capturing device 33 and the second image capturing device 34, depending on the edge position of the film F at the detected two points. The average tilt direction of the edge of the film F was calculated, and the tilt angle of the edge of the film F in the cut region AR1 was calculated.

The fourth A diagram and the fourth B diagram show the edge image of the film F taken by the photographing device.

The fourth A diagram shows an edge image of the film F taken by the first imaging device 33.

The fourth B diagram shows an edge image of the film F taken by the second imaging device 34.

In addition, in the fourth A diagram, the symbol CP1 is the center point of the imaging area of the first imaging device 33.

The symbol EP1 is the intersection of the line parallel to the x direction of the center point CP1 and the edge of the film F. The symbol H1 is the distance between the center point CP1 and the intersection point EP1.

Further, in the fourth B diagram, the symbol CP2 is the center point of the photographing area of the second photographing device 34. The symbol EP2 is the intersection of the line parallel to the X direction of the center point CP2 and the edge of the film F. The symbol H2 is the distance between the center point CP2 and the intersection point EP2. The distance H2 is larger than the distance H1 (H2>H1).

Here, as an example, the position of the edge of the film F at the detected two is explained. The method of calculating the inclination angle of the edge of the film F in the cutting area AR1 is calculated by the average inclination direction of the edge of the film F.

As shown in FIG. 4A and FIG. 4B, when the edge positions of the film F detected at two places are respectively set as the intersection point EP1 and the intersection point EP2, the film is detected between the edge positions of the film F at two places. The average tilt direction of the F edge becomes an oblique direction connecting the line of the intersection EP1 and the intersection EP2.

For example, when the coordinates of the center point CP1 are set to (x1, y1), the coordinates of the intersection EP1 are expressed as (x1 - H1, y1). Further, when the coordinates of the center point CP2 are set to (x2, y2), the coordinates of the intersection point EP2 are expressed as (x2-H2, y2). At this time, the intersection EP2 is separated from the intersection point EP1 by the degree of |(x2-x1)-(H2-H1)| in the X direction, that is, the degree of absolute value of (x2-x1)-(H2-H1). Further, the intersection point EP2 is separated from the intersection point EP1 by a degree of (y2-y1) in the Y direction.

Therefore, based on the average tilt direction of the edge of the film F between the edge positions of the film F detected at the two points, it is calculated that the inclination angle of the edge of the film F in the cut region AR1 is θ, expressed by the following formula (1) .

θ=tan-1{|(x2-x1)-(H2-H1)|/(y2-y1)}‧‧‧(1)

Further, since the first imaging device 33 and the second imaging device 34 are arranged in parallel with the Y direction, the x coordinate of the center point CP1 and the x coordinate of the center point CP2 are equal, and the term of (x2-x1) can be approximated to zero. At this time, the inclination angle θ of the edge of the film F in the cut region AR1 can be expressed by the following formula (2).

θ=tan-1{|(H2-H1)|/(y2-y1)}‧‧‧(2)

The control device 6 controls the cutting angle of the conveyance direction of the film F based on the inclination angle θ of the edge of the film F in the cutting region AR1 calculated by the above formula (1) or (2).

Here, when the target cutting angle of the conveying direction of the film is β in the non-snake state of the film, the control device 6 controls the cutting angle α according to the inclination angle θ as shown in FIG. 3B. (β-θ). For example, in the case where a single-piece film F1 having a rectangular shape in plan view is obtained from the film F, the control device 6 controls the cutting angle α of the conveyance direction of the film F to (90°-θ).

The fifth drawing shows a perspective view of the structure of the cutting device. In addition, since the first cutting device 31 and the second cutting device 32 have the same configuration, the fifth cutting device shows one of the two cutting devices 31 and 32 (the first cutting device). 31).

As shown in FIG. 5, the first cutting device 31 includes a cutting portion 311 that cuts the film F, and a guide portion 312 that guides the cutting portion 311 along the cutting direction V1 of the film F.

The cutting portion 311 is a circular cutter. For example, the cutting portion 311 is configured to be movable along a groove formed in the longitudinal direction of the guiding portion 312 by a driving mechanism (not shown). Further, the cutting portion 311 for cutting the film F is not limited to the cutter, and a laser may be used.

The guide portion 312 is a member that extends in one direction. The length of the guiding portion 312 is longer than the length of the film F in the width direction. The guide portion 312 is rotationally driven in a plane parallel to the film F in accordance with the cutting angle α controlled by the control device 6.

Returning to the third B diagram, the control device 6 rotates the first cutting device 31 and the second cutting device 32 in a state of being parallel to each other in accordance with the cutting angle α. Thereby, two single-piece films F1 of equal size from each other can be obtained from the film F.

(film cutting method)

The film cutting method according to the present embodiment includes a first step of winding the film F from the paper roll 7, transporting the film F to the cutting area AR1 set on the conveyance path of the film F, and calculating the pair in the cutting area AR1. a second step of the inclination angle of the conveying direction of the edge of the film F; and adjusting the cutting angle of the conveying direction of the film F according to the calculated inclination angle, and cutting the film F at the cutting area AR1 by the adjusted cutting angle The third step.

In the second step, the position of the edge is detected at a plurality of directions in the conveyance direction of the film F, and the inclination angle θ of the edge of the film F in the cutting region AR1 is calculated based on the relative positional relationship of the detected edges at the plurality of points. Hereinafter, the description will be specifically made using the sixth drawing.

The sixth drawing shows a flow chart of the film cutting method.

First, in the first step, the film F is taken up from the roll paper roll 7, and the film F is conveyed to the cut region AR1 set on the conveyance path of the film F (step S1 shown in Fig. 6). In the present embodiment, the first imaging device 33 is disposed on the upstream side of the cutting region AR1, and the second imaging device 34 is disposed on the downstream side of the cutting region AR1. For example, the film F is fed out from the edge of the end portion on the downstream side of the film F so as to overlap the imaging region of the second imaging device 34 as viewed in plan (see FIG. 3A).

Next, the second step is to calculate the inclination angle θ of the edge of the film F in the cutting region AR1 with respect to the conveyance direction (Y direction) (step S2 shown in Fig. 6).

The second step is two places in the conveyance direction of the film F (the first imaging device 33 disposed on the upstream side of the cutting region AR1 and the two cutting devices disposed on the downstream side of the cutting region AR1) The position of the edge of the film F is detected. Then, based on the average tilt direction of the edge of the film F between the edge positions of the film F detected at two points, the film F side in the cut region AR1 is calculated. The inclination angle θ of the edge (refer to the third A diagram).

The data of the inclination angle θ is memorized in the memory unit 6b.

Next, in the third step, the cutting angle α of the conveyance direction of the film F is adjusted based on the calculated inclination angle θ, and the film F is cut in the cutting area AR1 by the adjusted cutting angle α (the sixth figure is shown). Step S3).

The third step adjusts the cutting angle α of the conveyance direction of the film F based on the data of the inclination angle θ of the edge of the film F in the cutting area AR1 stored in the memory portion 6b. For example, as shown in FIG. 3B, the first cutting device 31 and the second cutting are performed so that the conveying direction of the film F becomes the intended cutting angle α in the first cutting direction L1 and the second cutting direction L2. The breaking device 32 rotates.

Then, the film F is cut along the first cutting direction L1 and the second cutting direction L2. Two single-piece films F1 were obtained by the above procedure.

In the film cutting method of the present embodiment, when the film cutting system 1 is used, the inclination angle θ of the edge of the film F in the cutting region AR1 with respect to the conveyance direction is calculated, and the cutting angle α with respect to the conveyance direction is controlled in accordance with the inclination angle θ. This control controls the cutting direction so as to increase the inclination angle θ of the edge of the film F due to the meandering of the film F and form a desired angle with respect to the conveyance direction. Then, the film F is cut by the cutting device that controls the cutting direction in this manner. Therefore, the film F can be precisely cut in the direction of the object.

Further, since it is not necessary to precisely correct the meandering of the film F, the constitution of the film cutting system 1 is simplified.

Further, in the present embodiment, the cutting area AR1 is set between the first imaging device 33 and the second imaging device 34. In other words, the cutting region AR1 is set within the range of the calculation region of the aforementioned inclination angle θ. Therefore, setting the cut region AR1 to the first photographing device 33 On the side of the swim side or the downstream side of the second imaging device 34, the above-described cutting angle α is controlled after sufficiently increasing the inclination angle θ of the edge of the film F due to the meandering of the film F. Therefore, the film F can be precisely cut in the direction of the object.

Further, in the present embodiment, the position of the edge of the film F is detected at two locations in the conveyance direction of the film F, and the average inclination direction of the edge of the film F between the edge positions of the film F detected at two points is calculated. An example of the inclination angle of the edge of the film F of the broken area AR1. However, the present invention is not limited to the case of calculating the inclination angle as described above, and may be applied to detecting the position of the edge of the film F at a plurality of points in the conveyance direction of the film F at three or more points, depending on the position of the edge of the film F detected at the plurality of points. The relative positional relationship is calculated, and the inclination angle of the edge of the film F in the cutting area AR1 is calculated. At this time, based on the relative positional relationship of the positions of the detected edges of the film F, for example, the average tilt direction of the edge of the film F can be obtained by the least square method. Then, the inclination angle of the edge of the film F in the cutting area AR1 is calculated based on the inclination direction.

In the present embodiment, an example in which an imaging device is disposed in two places in the conveyance direction of the film F will be described. However, the present invention is not limited to the example in which the imaging device is disposed as described above, and may be applied to a case where one imaging device is moved along the conveyance direction of the film F, and the position of the edge of the film F is detected at a plurality of conveyance directions. Thereby, one imaging device can be provided, so that the configuration of the cutting mechanism can be simplified. In addition, the degree of freedom in the layout design of the cutting mechanism can also be improved.

Further, in the present embodiment, an example in which two single-piece films F1 are cut out from the film F will be described. However, the present invention is not limited to the case where the two single-piece films F1 are cut out as described above, and may be applied to the case where one or three or more single-piece films F1 are cut out from the film F.

For example, in the configuration in which the single-piece film F1 is cut out from the film F, it is conceivable that the cutting device 3 of the first embodiment does not operate the first cutting device 31, but only the second cutting device. Set 32 to cut off the composition of the film F.

However, in this configuration, the cutting operation position of the second cutting device 32 is disposed at a substantially intermediate position between the first imaging device 33 and the second imaging device 34. In other words, the cutting action position of the second cutting device 32 is further away from the shooting area of the first imaging device 33. Therefore, at the cutting operation position of the second cutting device 32 (the intermediate position between the first imaging device 33 and the second imaging device 34), if the inclination direction of the edge of the film F fluctuates greatly, even if it depends on the inclination angle The cutting angle α adjusted by θ cuts the film F, and it is difficult to cut the film F accurately in the direction of the object.

Hereinafter, a second embodiment will be described as a configuration example suitable for cutting one single film F1 from the film F.

(second embodiment)

Fig. 7A and Fig. 7B are diagrams showing the operation of the cutting mechanism 13 of the second embodiment.

In the cutting mechanism 13 of the present embodiment, the second cutting device 32 is operated by the first cutting device 31 and the second cutting device 32 to cut the film F, and one single film F1 is obtained.

Hereinafter, the operation before the film F is cut by the cutting mechanism 13 of the second embodiment will be described. The cutting mechanism 13 of the present embodiment is different from the configuration of the cutting mechanism 3 of the first embodiment in that a third imaging device 35 is further provided.

The seventh A diagram shows a state before the second cutting device 32 is rotated. The seventh B diagram shows a state diagram after the second cutting device 32 is rotated.

In the seventh embodiment and the seventh embodiment, the same components as those in the third embodiment and the third embodiment are denoted by the same reference numerals, and the detailed description is omitted.

As shown in FIG. 7A, the first imaging device 33, the second imaging device 34, and the third The imaging device 35 is disposed in such a manner that the transport direction (Y direction) of the film F is parallel to a predetermined distance. The third imaging device 35 is disposed at a substantially intermediate position between the first imaging device 33 and the second imaging device 34. The third imaging device 35 is disposed on the upstream side of the cutting region AR2 (on the upstream side of the second cutting device 32) in the vicinity of one end portion of the second cutting device 32. The third imaging device 35 captures an image of the edge of the film F on the upstream side of the cut region AR2. Further, the second imaging device 34 is disposed on the downstream side of the cutting region AR2 (on the downstream side of the second cutting device 32) in the vicinity of the position at which the end portion on the downstream side of the film F is sucked by the suction device (not shown). (Set near the suction position on the transport path). The second imaging device 34 captures an image of the edge of the film F on the downstream side of the cut region AR2.

The control device 6 detects the positions of the edges of the two films F according to the images of the edges of the film F taken by the third imaging device 35 and the second imaging device 34, according to the film between the edge positions of the film F detected at two locations. The average tilt direction of the F edge calculates the tilt angle of the edge of the film F in the cut region AR2.

As described above, in the present embodiment, the cutting operation position of the second cutting device 32 is disposed in the vicinity of the imaging region of the third imaging device 35. Therefore, at the cutting operation position of the second cutting device 32 (near the imaging region of the third imaging device 35), even if the inclination direction of the edge of the film F fluctuates greatly, the variation in the oblique direction is sufficiently added, and the cutting is calculated. The angle of inclination of the edge of the film F of the broken area AR2. Therefore, when one single film F1 is cut out from the film F, the film F can be precisely cut in the direction of the object.

The control device 6 controls the cutting angle of the film F in the conveyance direction in accordance with the calculation of the inclination angle of the edge of the film F in the cutting region AR2. Further, the inclination angle of the edge of the film F in the cutting area AR2 can be calculated in accordance with the above formula (1) or formula (2). At this time, a line parallel to the X direction and an edge of the film F passing through the center point of the photographing region of the third photographing device 35 may be used. The intersection is replaced by the aforementioned intersection EP1.

The control device 6 rotates the second cutting device 32 in accordance with the aforementioned cutting angle. Thereby, one single-piece film F1 of a specified size can be obtained from the film F.

The embodiments of the present invention have been described above with reference to the accompanying drawings, and it should be understood that the description of the present invention should not be considered as limiting. Additions, omissions, substitutions, and other changes may be made without departing from the scope of the invention. Therefore, the invention is not to be considered as limited by the foregoing description, and the invention is limited by the scope of the claims.

1‧‧‧Film cutting system

2‧‧‧Transportation device

3‧‧‧cutting mechanism

3A‧‧‧Intermittent Transport Department

4‧‧‧Transport conveyor

5‧‧‧ Moving out of the agency

6‧‧‧Control device

6a‧‧‧Operation Processing Department

6b‧‧‧Memory Department

7‧‧‧Roller roller

8‧‧‧ reel

15‧‧‧Tray

21‧‧‧Guide Roller

22‧‧‧Support roll

23‧‧‧Floating roller

23a‧‧‧Axis

31‧‧‧First cut-off device

32‧‧‧Second cutting device

33‧‧‧First camera

34‧‧‧Second camera

AR1‧‧‧ cut area

F‧‧‧film

F1‧‧‧one film

Claims (9)

A film cutting method for winding a film from a roll paper in which a film is wound into a roll shape, and transporting the film to a cutting region set on a conveyance path of the film; and calculating the film in the cutting region The angle of inclination of the edge to the conveyance direction of the film; the cutting angle of the film in the conveyance direction is adjusted according to the calculated inclination angle, and the film is cut in the cutting region by the adjusted cutting angle. The film cutting method according to claim 1, wherein when the inclination angle of the edge of the film is calculated, the position of the edge is detected at a plurality of the conveyance directions, and is detected according to the plurality of points. The relative positional relationship of the edges is used to calculate the aforementioned inclination angle of the edge of the cutting region. The film cutting method according to claim 1, wherein when the inclination angle of the edge of the film is calculated, the position of the edge is detected at two points in the conveyance direction, and based on the detected two points The inclination angle of the edge of the cutting region is calculated by the average inclination direction of the edge between the positions of the edge. The film cutting method according to the second or third aspect of the invention, wherein, in calculating the inclination angle of the edge of the film, the position of the edge of the plurality of points is at least detecting that the cutting area is being conveyed a position of the edge on the upstream side in the direction and a front edge of the cutting area on the downstream side in the conveyance direction s position. A film cutting system comprising: a conveying device that winds the film from a roll paper roll that winds a film into a roll shape, and conveys the film to a cutting area set on a conveyance path of the film; The device calculates an inclination angle of the edge of the film in the cutting direction of the film in the cutting region, controls a cutting angle of the film in the conveying direction according to the inclination angle, and a cutting device The film is cut in the cutting region by the cutting angle controlled by the control device. The film cutting system of claim 5, comprising a photographing device that captures an image of the edge at a plurality of locations in the transport direction, wherein the control device is configured according to the edge of the plurality of photographs captured by the photographing device The image detects the edge position of the plurality of points, and calculates the tilt angle of the edge of the cut region based on the relative positional relationship of the edge detected at the plurality of points. The film cutting system of claim 6, wherein the control device detects the position of the edge of the two places according to the image of the edge of the two positions captured by the image capturing device, according to the detected position. The average inclination direction of the edge between the positions of the two edges is calculated, and the inclination angle of the edge of the cutting area is calculated. For example, in the film cutting system of claim 6 or 7, The imaging device captures at least an image of the edge of the cutting area on the upstream side in the conveying direction and an image of the edge of the cutting area on the downstream side in the conveying direction. The film cutting system of claim 5, wherein the cutting device comprises: a cutting portion that cuts the film; and a guiding portion that guides the cutting portion along a cutting direction of the film; The guide portion is rotationally driven in a plane parallel to the film in accordance with the cutting angle controlled by the control device.