WO2007097020A1

WO2007097020A1 - Film cutting device

Info

Publication number: WO2007097020A1
Application number: PCT/JP2006/303594
Authority: WO
Inventors: Wataru Ogasawara
Original assignee: Honma Precision Metalworking Co., Ltd.
Priority date: 2006-02-27
Filing date: 2006-02-27
Publication date: 2007-08-30
Also published as: JPWO2007097020A1; JP3914564B1

Abstract

A film cutting device for cutting the corners of a film, in which adjustment between cutting tools is eliminated, the entire film cutting device is formed in a simple structure and reduced in size, and the yield rate of film materials is increased. The cutting device for a film has a first cutter (11) having a center cutting blade located at the lateral center of the first cutter (11) and corner cutting blades continuing to both sides of the center cutting blade, a second cutter (12) having a center cutting blade engaging the center cutting blade of the first cutter (11), a third cutter (13) disposed facing the second cutter (12) at an interval exceeding the thickness of the film (22) when the cutter is on standby for cutting and having corner cutting blades located at both lateral ends of the third cutter (13), and fourth cutters (14R, 14L) having corner cutting blades engaging the corner cutting blades of the first cutter (11) and also engaging the corner cutting blades of the third cutter (13).

Description

Specification

Film cutting device

Technical field

TECHNICAL FIELD [0001] The present invention relates to a film cutting device, and more particularly to a film cutting device for a plastic film or the like used as a storage case or a package bag.

Background art

[0002] Two flat, rectangular, thin, plastic films for storage cases such as documents, daily necessities, toiletries, cosmetics, and knocker bags (including fillings) for food, beverages, detergents, etc. (Hereinafter abbreviated as “film” t) is often used by laminating three sides. In addition, a thin film that is folded in two and welded on both sides and a slide fastener for opening the storage case on the other side is often used. Conventionally, such a film is obtained by intermittently feeding a continuous long film in the length direction and cutting it with a Thomson blade or a guillotine blade every intermittent feed.

[0003] By the way, if the corners of a rectangular film are sharp, other films may be pierced to make holes, and in extreme cases, the human body may be damaged. In order to prevent these accidents, there is also a relationship with the PL Law (Product Liability Law), and recently, most storage cases and package bags are rounded off at the corners of the rectangle, so-called round ( The corners are rounded.

[0004] For example, Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2003-340777) proposes an apparatus that performs such corner force check. FIG. 6 (A) is a perspective view of the film cutting device 40 proposed in Patent Document 1, and FIG. 6 (B) is a diagram showing a corner processing procedure. In Patent Document 1, “Sheet” is “Film”, “Round” or “Chamfering” is “Corner Processing Section”, and “Corner Cutting Device” is “Cutting Device”. To do.

In FIG. 6A, a film cutting device 40 includes a first cutter 41 and a second cutter 42, and pulls the leading end of the web 51a from the long film 51 as a feed amount (F) (indicated by a dotted arrow). It is cut into a film 52 of a predetermined size, and corner force is applied to each corner according to the procedure of FIG. 6 (B). Furthermore, referring to Fig. 6 (A), detailed explanation will be given based on Fig. 6 (B). Then, first, as shown in FIG. 6B (a), the lower blade 41D and the upper blade 41U of the first cutter 41 cut the long film 51 drawn out as the feed amount (F), and Corner force is applied to the corner of the trailing edge 52u of the long film 51 to form corner processed parts (indicated by bold lines) 52c and 52d. In addition, as shown in Fig. 6 (B) (b), the lower cutter 42D and the upper cutter 42U of the second cutter 42 are cornered at the corner of the cut end 52m of the film 52 (shown in bold lines). The corner processed parts 52a and 52b are used. As a result, as shown in FIGS. 6 (B) and 6 (c), the corners 52a, 52b, 52c, and 52d are subjected to corner processing 52a, 52f and 52d, and the chips 53 are formed into scraps. When this corner processing is completed, the film 52 is sucked by the suction table 43 and conveyed downstream so as to straddle the second force cutter 42. Further, the film cutting device 40 proposed in Patent Document 1 stabilizes the scattering direction of the cut chips 53 by making the blade edges 42a and 42b of the corner machining portion of the second cutter 42 into a V shape. The chips 53 are collected by the absorption device 44.

[0005] Patent Document 1: Japanese Unexamined Patent Publication No. 2003-340777

Disclosure of the invention

Problems to be solved by the invention

[0006] The film cutting device 4 as shown in FIG.

0 is likely to cause problems as shown in (1) to (4) below!

[0007] (1) Extremely accurate adjustment between cutting tools is required, which may cause quality problems.

Problems in corner processing in the film cutting apparatus 40 proposed in Patent Document 1 will be described with reference to FIGS. 6 (C) (a) to (c). Fig. 6 (C) (a) shows the film 52 after corner processing when the pitch (P) between the first cutter 41 and the second cutter 42 is adjusted to be shorter than the feed amount (F) of the film 52. It is a schematic plan view. Figures 6 (C) and 6 (b) show the results after cornering when the pitch (P) between the first cutter 41 and the second cutter 42 is adjusted to be longer than the feed amount (F) of the film 52. 3 is a schematic plan view of a film 52. FIG.

As shown in Fig. 6 (C) (a), when the pitch (P) between the first cutter 41 and the second cutter 42 is adjusted to be shorter than the feed amount (F) of the film 52, the film Extra ears 52e are generated at the corners 52a and 52b of 52.

On the other hand, as shown in FIGS. 6 (C) and (b), the first cutter 41 and the first cutter 41 with respect to the feed amount (F) of the film 52 When the pitch (P) between the two cutters 42 is adjusted to be long, edges 52f are generated at the corners 52a and 52b of the film 52. Therefore, in the film cutting device 40 proposed in Patent Document 1, in order not to cause such a problem in corner processing, in addition to the film 52 feed amount (F), the film 52 feed amount (F) Therefore, it is necessary to adjust the relationship between the pitch (P) between the cutting devices (the first cutter 41 and the second cutter 42) very accurately. If this is not done, there may be a problem in quality.

[0008] (2) The entire device has a complicated structure and large size

In a film cutting apparatus 40 proposed in Patent Document 1, a first cutter 41 and a second cutter 42 are arranged apart from each other by a pitch (P). Therefore, in the case of a setup change that changes the length of film 52, in addition to changing the feed amount (F) of film 52, the pitch (P) of first cutter 41 and second cutter 42 must also be changed. It takes a lot of time and effort to make adjustments. In addition, after corner processing, a mechanism for sucking and discharging the film 52 by the suction table 43 is also required. For this reason, the entire device has a complicated structure and a large force, which increases the manufacturing cost and requires a large installation area. As a result, the manufacturing cost of film 52 also increases. .

[0009] (3) Trouble is likely to occur in the long film feed mechanism!

In addition, when the long film 51 is fed from the first cutter 41 to the second cutter 42, the protrusion 51e at the corner of the leading edge of the long film 51 in the feeding direction is caught on the second cutter 42 and others. Troubles are likely to occur in the feeding mechanism of the long film 51.

[0010] (4) The material yield of the film is low and it is necessary to add chip disposal means.

In order to prevent defects in corner processing, a cutting margin is generally provided between films. FIGS. 6 (C) and 6 (c) are schematic plan views of the film 52 subjected to corner force check with a cutting margin S (for example, 2 to 5 mm in a package bag). As shown in Fig. 6 (C) (c), the cutting allowance 53s is added to obtain one film 52, so the material yield from the long film 51 to the cornered film 52 is poor. In addition, the cutting allowance 53 s as well as the chip 53 requires additional processing such as chip processing means.

Accordingly, an object of the present invention is to provide a film cutting apparatus that performs corner processing on corners of a film (including a sheet), and (1) eliminates the need for extremely accurate adjustment between cutting tools. 2) The entire device can be made simple and small in size, (3) it is difficult to cause troubles in the long film feed mechanism, and (4) the material yield of the film is improved, and chip disposal means, etc. It is to obtain a film cutting apparatus that does not require additional tracking.

Means for solving the problem

[0012] As a cutting tool, the present inventors have used many blades so that the film is cut at one place and corner processing is performed on all corners of the leading edge and the trailing edge in the feed direction. The inventors obtained the knowledge that the above problems can be solved by adopting a mating structure and arrived at the present invention.

That is, the present invention relates to a film cutting apparatus that cuts and removes a predetermined region at the edge in the width direction of a long film having a predetermined width, and cuts the central portion in the width direction that has been cut and removed. However, the following first to fourth cutters are provided.

First cutter: A center cutting blade A located at the center in the width direction and a corner cutting blade a connected to both sides of the center cutting blade A are provided.

Second cutter: A center cutting blade B that mates with the center cutting blade A of the first cutter. Third cutter: At the time of waiting for cutting, there is provided a corner cutting blade b positioned opposite to the second cutter with an interval exceeding the thickness of the film and positioned at both ends in the width direction.

Fourth cutter: A corner cutting blade c that mates with a corner cutting blade a of the first cutter and a corner cutting blade b of the third cutter.

The film cutting apparatus of the present invention cuts and removes both edges of the film by mating with the first cutter corner cutting blade a, the third cutter corner cutting blade b, and the fourth cutter corner cutting blade c. I do. Furthermore, the film cutting apparatus according to the present invention cuts the central portion in the width direction of the film remaining after being cut and removed by matching the center cutting blade A of the first cutter with the center cutting blade B of the second cutter. It is characterized by

[0014] By adopting the above configuration, (1) when two cutting devices are provided in the longitudinal direction of the film, it is not necessary to make an extremely accurate adjustment between the cutting devices, and (2) the entire device has a simple structure. (3) Trouble occurs in the long film feed mechanism 1, and force (4) Film cutting device that improves film yield and does not require additional chip disposal means It becomes.

In the present invention, the first cutter corner cutting blade a, the third cutter corner cutting blade b and the first cutter The cutting edge of the film was removed in advance by mating with the four-cut corner cutting blade c, and then the central portion in the width direction of the film left after the cutting was removed. It is preferable to cut by cutting the cutting blade A with the center cutting blade B of the second cutter. With this configuration, the film is positioned together with the cutting by the first cutter, the third cutter, and the fourth cutter, and the cutting center is not shifted when the film is cut by the first cutter and the second cutter.

[0016] In the present invention, the corner cutting blade c of the fourth cutter projects a predetermined amount from the corner cutting blade a of the second cutter with respect to the first cutter and the third cutter, and the second cutter and the fourth cutter. Make it a reality. By doing so, cutting and removal of both edges of the film is performed in advance without independently controlling the operation of the second cutter and the fourth cutter in the cutting operation, and then the film remaining after the cutting is removed. The central part in the width direction can be cut.

In the present invention, when the film is cut with the first cutter and the second cutter, the film is sandwiched between the second cutter and the third cutter, and the center cutting blade A and the second cutter of the first cutter are in that state. It is preferable to cut the central portion in the width direction of the film remaining after being cut and removed by the cutting operation in which the center cutting blades B meet. By adopting this configuration, it is possible to prevent deformation of the film and generation of burrs during cutting.

[0018] In the present invention, in the process of the cutting operation in which the center cutting blade A of the first cutter and the center cutting blade B of the second cutter are mated, the second cutter presses the third cutter and the third cutter It is preferable to retreat in the pressing direction from the position. This is because the film is more reliably cut by the center cutting blade A of the first cutter and the center cutting blade B of the second cutter.

[0019] Since the second cutter presses the third cutter and the third cutter moves backward in the initial position force pressing direction, the film cutting device of the present invention presses the third cutter in the direction of the second cutter. There is a spring, and the pressing force of this spring may be smaller than the pressing force to the second cutter by the third cutter, which is greater than the cutting resistance in cutting and removing both edges of the film. With this configuration, the third cutter can accept the cutting resistance when both edges are cut by the fourth cutter. Also, with this configuration, the third cutter retracts when cutting with the second cutter, and can assist in cutting the central portion of the film.

[0020] In the present invention, the center cutting blade A of the first cutter and the center cutting blade B of the second cutter are: The blades are straight along the width direction of the film, and the first cutter's corner cutting blade a, the third cutter's corner cutting blade b, and the fourth cutter's corner cutting blade c are round or long film. A linear cutting blade having a predetermined angle with respect to the direction can be provided. With this configuration, the shape of film corner processing can be varied according to the storage case, package bag, and the like.

The invention's effect

[0021] According to the film cutting apparatus of the present invention, when producing a film in which corner calorie is applied to the corners of a film (including a sheet), (1) an extremely accurate adjustment between the two cutting apparatuses is performed. (2) The entire device has a simple structure and the force can be reduced. (3) Troubles do not easily occur in the long film feeding mechanism, and (4) the film yield is improved. Addition of chip disposal means is not required.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an example of an embodiment of the invention will be described in detail with reference to the drawings.

FIG. 1 is a front view of a film cutting apparatus 10 according to the embodiment, FIG. 2 is an exploded perspective view showing the cutters constituting the cutting tool apart, and FIG. 3 cuts the long film 21 with the cutting tool. It is a perspective view which shows a mode. FIG. 4 is a diagram showing the operation of the cutting device 10 according to the embodiment. Further, FIG. 5 is a plan view of an example of each film 22 after being cut by the cutting device 10 of FIG.

In FIG. 1, the cutting device 10 includes a base plate 17a and a movable plate 17e that is guided by a guide post 17b standing on the base plate 17a and slides up and down via a joint 17d by a cylinder 17c. ing.

A cutting tool is installed between the base plate 17a and the movable plate 17e. This cutting tool includes a first cutter 11 and a third cutter 13 arranged on the base plate 17a side, and a second cutter 12 and a fourth cutter 14 arranged on the movable plate 17e side. The second cutter 12 and the fourth cutter 14 move up and down as the movable plate 17e moves up and down. The fourth cutter 14 also constitutes a force with a pair of the fourth cutter 14R and the fourth cutter 14L disposed at a predetermined interval in the width direction of the long film 21.

A long film 21 is placed between the base plate 17a and the movable plate 17e in the cutting device 10. A stripper plate 17f for pressing the film 22 prior to the cutting tool when cutting is also provided.

[0024] As shown in FIG. 3, the film 22 cut by the cutting device 10 includes a front end side 22m and a rear end 22u. The front end side 22m and the rear edge end 22u form a straight line. However, each end has a rounded corner processed portion (22a, 22b, 22c, 22d).

Hereinafter, the cutting apparatus 10 will be described in more detail.

First, the cutting tool will be described with reference to FIGS.

First Katsuta 11:

The first cutter 11 has a rectangular parallelepiped shape, and a part of the ridgeline constitutes a cutting edge. This cutting blade is composed of a linear center cutting blade 111 and corner cutting blades 112 at both ends thereof. The center cutting blade 111 corresponds to the cutting portion 22x of the front end side 22m (or the rear edge 22u) of the film 22, and the corner cutting blade 112 has a shape corresponding to the corner processing portions 22c and 22d of the film 22.

[0026] 2nd Katsuta 12:

Similarly to the first cutter 11, the second cutter 12 also constitutes a center cutting blade 121 having a part of the ridge line, but both ends thereof do not function as cutting blades. The center cutting blade 121 has a shape corresponding to the cutting portion 22x on the front end side 22m (or the rear edge end 22u) of the film 22. Both end portions of the second cutter 12 have shapes corresponding to the corner force feeding portions 22a and 22b of the film 22, but as described above, they do not function as cutting blades!

In the stage of waiting to cut the film 22, the second cutter 12 waits above the third cutter 13 with an interval exceeding the thickness of the film 22. This is to allow passage of the long film 21 (film 22) between the second cutter 12 and the third cutter 13. When the film 22 is cut, the second cutter 12 is lowered by a predetermined amount, so that the center cutting blade 111 of the first cutter 11 and the center cutting blade 121 of the second cutter 12 are held together. Katsuta 12 is in place.

[0028] Third cut 13:

As with the first cutter 11 and the second cutter 12, part of the ridgeline of the third cutter 13 is a corner cut. The cutting blade 132 is configured. The corner cutting blade 132 has a shape corresponding to the corner processed portions 22a and 22b of the film 22. The straight portion between the corner cutting blades 132 does not function as a force cutting blade having a shape corresponding to the cutting portion 22x on the front end side 22m (or the rear edge 22u) of the film 22.

[0029] The third cutter 13 and the first cutter 11 are arranged such that the side surfaces on which the cutting blades are formed face each other with a predetermined clearance. In addition, the third cutter 13 moves downward and retracts when the upper surface of the third cutter 13 is pressed by the second cutter 12 due to the operation of the second force cutter 12 positioned above and lowering the second cutter 12, and the second cutter 12 is raised. When contact is released, it will rise to the original standby position and return. The third cutter 13 is supported by the coil spring 15 in order to raise the third cutter 13 to the initial standby position. The coil spring 15 has a spring characteristic that is smaller than the pressing force received by the second cutter 12 from the third cutter 13 that is larger than the cutting resistance applied when the corner is cut. Here, it is needless to say that the force shown by the coil spring 15 can be replaced by another elastic member that exhibits the above-described function.

[0030] Fourth cutout 14:

The fourth cutter 14 (14R, 14L) includes corner cutting blades 142R and 142L, respectively. The corner cutting blades 142R and 142L mesh with the corner cutting blade 112 of the first cutter 11 and the corner cutting blade 132 of the third cutter 13 and have a possible shape!

The corner cutting blades 142R and 142L are arranged so as to protrude from the center cutting blade 121 of the second cutter 12 in the direction of the first cutter 11 or the second cutter 12. This protruding amount G is equal to or greater than the thickness of film 22.

When the film 22 is cut, the fourth cutter 14 is lowered together with the second cutter 12 while maintaining the protruding amount G. In the present embodiment, the fourth cutter 14 is integrally fixed to the second cutter 12 in order to maintain the protruding amount G.

[0031] The first cutter 11 to the fourth cutter 14 described above constitute a cutting tool, and the second cutter 12 and the fourth cutter 14 (14R, 14L) are lowered in the direction of the third cutter 13 to The film 22 is cut through a staged cutting step.

That is, the protruding corner cutting blades 142R, 142L of the fourth cutter 14 (14R, 14L) squeeze first with the corner cutting blade 121 of the first cutter 11 and the corner cutting blade 132 of the third cutter 13. As a result, the Kona Karo arsenal 22a, 22b, 22c, 22d forces are cut and formed on the fed long Finolem 21. The corner processed portions 22a and 22b are cut and formed by the first cutter 11 and the fourth cutter 14. The corner force feeding portions 22c and 22d are cut and formed by the third cutter 13 and the fourth cutter 14.

Next, when the center cutting blade 121 of the second cutter 12 and the center cutting blade 111 of the first cutter 11 are engaged with each other, the long film 21 is cut into the rectangular film 22, and the front side of the film 22 22m and trailing edge 22u are formed. Hereinafter, the cutting operation of the cutting apparatus 10 will be described in more detail with reference to FIG.

[0032] Fig. 4 (a) shows a cutting standby state in which the long film 21 is placed on the tool surface, Fig. 4 (b) shows a cornered state, and Fig. 4 (c) shows a state in which cutting has been completed. ing. In FIG. 4, the lower part is a longitudinal sectional view of each state, and the upper part is a plan sectional view of a portion (indicated by a dotted oblique line) functioning in corner processing or cutting in each state. The thick and solid lines in the upper part of Figs. 4 (b) and 4 (c) indicate the corner cache or the cut part.

First, in FIG. 4A, the long film 21 fed by the feed amount (F) is placed on the upper surfaces of the first cutter 11 and the third cutter 13. Subsequently, in FIG. 4 (b), when the second cutter 12 is lowered as indicated by a dotted arrow, the thickness of the film 22 is integrated with the second cutter 12 and more than the center cutting blade 121 of the second cutter 12. Furthermore, the fourth cutter 14 in which the corner cutting blades 142R and 142L protrude (G) also descends. Then, the corner cutting blades 142R and 142L of the fourth cutter 14 and the corner cutting blade 112 of the first cutter 11 and the corner cutting blade 132 of the third cutter 13 respectively. Therefore, the first cutter 11, the third cutter 13, and the fourth cutter 14 force corner processing at the front end side 22m corner and the rear edge end 22u at the same time, and corner processing portions 22a, 22b, 22c indicated by thick solid lines , 22d force is formed.

Subsequently, as shown in FIG. 4 (c), when the second cutter 12 further descends as indicated by a dotted arrow, the third cutter 13 supported upward by the coil spring 15 is pushed in. The second cutter 12 and the third cutter 13 are lowered and retracted by a predetermined amount while resisting the stress of the coil spring 15 with the long film 21 sandwiched therebetween. At this time, the center cutting blade 111 of the first cutter 11 and the center cutting blade 121 of the second cutter 12 are brought into contact with each other, whereby the long film 21 is cut at the cutting portion 22x (shown by a thick solid line), and FIG. It becomes one rectangular film 22 as shown in (a). . The film 22 that has been subjected to corner processing and cutting is immediately sent to the next step. In FIG. 4 (b), the force that generates smaller chips 23 in the corner casing. This chip 23 is compressed air introduced into the fourth cutters 14R and 14L, and the first cutter 11 and the third cutter below. The air is blown off in the vacant spaces formed on both sides of the pit 13 and the chips 23 are absorbed from these vacant spaces. For this reason, the chip 23 does not remain in the cutting tool, and chip disposal is facilitated.

In FIG. 3 and FIG. 4, the force is such that the long film 21 also sends the side force of the movable third cutter 13. In order to smoothly feed the long film 21 without being affected by the vertical movement of the third cutter 13, the first cutter 11 U, prefer to send from the side.

[0036] According to the cutting device 10 of the embodiment, the following (1) to (4) can be achieved.

(1) No adjustment between cutting tools, high quality

As the cutting tool, the first cutter 11, the second cutter 12, the third cutter 13 and the fourth cutter 14 are collected in one place, so that cornering and cutting are performed together, so there is no need to adjust between cutting devices. Become. Since adjustment between the cutting devices is not necessary, the shape 22 of the corner processed portions 22a to 22d and the cut portion 22x can have a uniform size and a high quality film 22.

[0037] (2) The entire device has a simple structure and is small

The cutting tool can be installed in a die set as shown in FIG. In addition, in the case of a setup change in which the length of the film 22 is changed, it is only necessary to change the feed amount (F) of the film 22, so that adjustment is sufficient in a short time. In addition, since the film 22 cut and cut at the corner force is immediately sent to the next process, a complicated dispensing mechanism is not required. Because of this, the entire device has a simple structure and a small force, which lowers the manufacturing cost and does not increase the installation area. As a result, the manufacturing cost of the film 22 can be reduced. it can.

[0038] (3) Fewer troubles in the long film feed mechanism! /

If the corners 22a and 22b of the film 22 are rounded, for example, the sheet-like film 21 will not be caught when sent to the cutting tool. For this reason, it is possible to reduce the occurrence of troubles in the feeding mechanism of the long film 21.

[0039] (4) High film material yield and easy chip disposal

The cutting allowance S described above can be reduced to about 0.2 to 0.3 mm, and corner processing In addition, since only other small chips 23 are removed after cutting, the material yield of the film 22 can be increased. Further, the chip processing means can be easily manufactured by forming the chip 23 of the small pieces in combination with blowing and suction in the cutting tool.

[0040] Note that the cutting device 10 of the embodiment, as shown in FIG. 5 (a), as shown in FIG. The corner force feeding portions 22a to 22d can be formed in a straight shape on the front end side 22m (or rear end side 22u) and in a round shape on the rear end side 22u (or front end side 22m). Further, as shown in FIG. 5 (c), the corner processed portions 22a to 22d can be all linearly formed on the front end side 22m and the rear end side 22u. It is preferable in terms of strength of the corner cutting blades 142R and 142L of the fourth cutter 14 to make the corner processed portions 22a to 22d linear. In other words, when the corner force feeding portions 22a to 22d are rounded, the corner cutting edges 142R and 142L of the fourth cutter 14 must be sharpened, whereas the corner force feeding portions 22a to 22d are required. In the case of a straight line shape, the force can also make the tip of the corner cutting blades 142R and 142L of the fourth cutter 14 an obtuse angle.

[0041] Further, as shown in FIG. 5 (d), the front end side 22m and the rear end side 22u are cut not in a straight line but in a curved shape, and a hole 22h or the like is formed near the rear end side 22u (or the front end side 22m). Various shapes such as cornering, cutting, etc. can be performed. As a result, various films 22 can be formed according to the storage case or the knock bag.

Furthermore, although the above-described cutting device 10 has been described as a device for cutting a single long film 21, a plurality of long films 21 are arranged in parallel, and a plurality of rows of cutting tools corresponding to the following are arranged. It can also be set as the cutting device.

[0042] Further, the cutting device 10 of the embodiment feeds the long film 21 horizontally, but it can also be sent in an inclined manner, and the corner tool and the cutting tool can be turned upside down. It is also possible to cut. It is also possible to operate the cutting tool from the drive source of the feeder for the long film 21 by, for example, a link mechanism. Corner processing is also applicable to some corners, not all corners.

Brief Description of Drawings

FIG. 1 is a front view of a film cutting apparatus 10 according to an embodiment.

FIG. 2 is an exploded perspective view of a main part of the film cutting device 10. FIG. 3 is a perspective view of essential parts of the film cutting device 10.

FIG. 4 is a view showing the operation of the cutting apparatus 10 according to the embodiment, where (a) is a state in which the long film 21 is placed on the tool surface, (b) is a state in which corner processing is performed, (c ) Shows the cut state, the lower part is a longitudinal sectional view of each state, and the upper part is a plan sectional view of a part (indicated by a dotted diagonal line) that functions in corner processing or cutting in each state. .

[FIG. 5] (a) to (d) are plan views of an example of each film 22 after being cut by the cutting device 10 of FIG.

FIG. 6 shows a film cutting device 40 proposed in Patent Document 1, (A) is a perspective view thereof, (B) is a diagram showing a corner processing procedure, and (C) is a diagram showing an example of processing failure. It is.

Explanation of symbols

10: Film cutting device,

11: First cutter 111: Center cutting blade 112: Corner cutting blade

12: 2nd cutter, 121: Center cutting blade,

13: No. 3 cutter, 132: Corner cutting blade,

14 (14R, 14L): 4th cutter, 142R, 142L: Corner cutting blade,

15: Coil spring,

17a: Base plate, 17b: Guide post, 17c: Cylinder, 17d: Fitting, 17e: Movable plate, 17f: Stripper plate,

21: Long film, 22: Film, 22a, 22b, 22c, 22d: Corner caloe section, 22x: Cutting section, 22m: Front end side, 22u: Rear end side, 52: Film, 52a, 52b, 52c, 52d: Corner caloe Part, F: Feed amount, G: Protrusion

Claims

The scope of the claims

[1] A film cutting apparatus that cuts and removes a predetermined region at both edges in the width direction of a long film having a predetermined width, and cuts the central portion in the width direction left after being cut and removed.

A first cutter comprising a center cutting blade A located in the center in the width direction and _a corner cutting blade _a connected to both sides of the center cutting blade A;

A second cutter provided with a center cutting blade B that mates with the center cutting blade A of the first cutter, and opposed to the second cutter with an interval exceeding the thickness of the film when waiting for cutting; A third cutter provided with corner cutting blades b located at both ends in the width direction, and a fourth cutter provided with corner cutting blades c that match the corner cutting blades a of the first cutter and the corner cutting blades b of the third cutter. With katsuta,

By cutting the corner cutting blade a of the first cutter and the corner cutting blade b of the third cutter with the corner cutting blade c of the fourth cutter, cutting of both edges of the film is removed. Done

The central portion in the width direction of the film remaining after being cut and removed is cut by the engagement between the center cutting blade A of the first cutter and the center cutting blade B of the second cutter. Film cutting device.

[2] Cutting the both edges of the film by fitting the corner cutting blade a of the first cutter and the corner cutting blade b of the third cutter with the corner cutting blade c of the fourth cutter Remove in advance,

Next, the central portion in the width direction of the film remaining after being cut and removed is cut by the engagement between the center cutting blade A of the first cutter and the center cutting blade B of the second cutter. The film cutting device according to claim 1, wherein:

[3] The corner cutting blade c of the fourth cutter projects a predetermined amount from the corner cutting blade a of the second cutter with respect to the first cutter and the third cutter,

By integrating the second cutter and the fourth cutter,

The corner cutting blade a of the first cutter, the corner cutting blade b of the third cutter, and the corner cutting blade c of the fourth cutter are in contact with each other of the two edges of the film. Cutting and removing in advance,

Next, the central portion in the width direction of the film left after being cut and removed is

3. The film cutting apparatus according to claim 2, wherein the film cutting device is configured to cut by a match between the center cutting blade A of one cutter and the center cutting blade B of the second cutter.

[4] When cutting the film with the first cutter and the second cutter, the film is sandwiched between the second cutter and the third cutter, and the center cutting blade A of the first cutter is in that state. 2. The film cutting according to claim 1, wherein the central portion in the width direction of the film left after being cut and removed is cut by a cutting operation in which the center cutting blade B of the second cutter is brought into contact with each other. apparatus.

[5] In the course of the cutting operation in which the center cutting blade A of the first cutter and the center cutting blade B of the second cutter are mated, the second cutter presses the third cutter and presses the third cutter. 4. The film cutting device according to claim 3, wherein is retracted in the pressing direction.

[6] A spring for pressing the third cutter in the direction of the second cutter,

The pressing force of the spring is

6. The film cutting device according to claim 5, wherein the film cutting device is larger than a cutting resistance in cutting and removing both edges of the film, but smaller than the pressing force applied to the second cutter by the third cutter. .

[7] The center cutting blade A of the first cutter and the center cutting blade B of the second cutter are linear blades along the width direction of the film,

The corner cutting blade a of the first cutter, the corner cutting blade b of the third cutter, and the corner cutting blade c of the fourth cutter have a round shape or a predetermined angle with respect to the longitudinal direction of the film. 2. The film cutting device according to claim 1, further comprising a linear cutting blade.