JPS6320678B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to film cutting in a turret type film winding machine that rotates a winding core, and in particular, to cutting a running film by moving a cutter in the width direction of the film. The present invention relates to a cutting method in which cutting is performed while traveling (hereinafter referred to as traverse cut) and an apparatus therefor.

[Prior Art] In general, a winding machine that winds a film that is continuously produced and continuously transported is used to move the winding core between the film winding position and the core in order to wind the film one after another around the winding core. A turret-type winder is used that has a turret at the take-out position. In a turret type film winder, after winding a certain length of film around a winding core, it is necessary to cut the running film in the width direction in order to wind the film around the next winding core. However, the conventional method for cutting this film has been a method in which the entire width of the film is cut at once using a saw-like blade (hereinafter referred to as cross-cutting). However, cross-cutting is limited by the film running speed, and if the film winding speed, that is, the film running speed exceeds a certain speed, it will no longer be possible to cut the film, or even if it can be cut, it will tear the film. When the film is cut, the ends of the cut film become disordered, resulting in a large amount of loss in the wound film. Furthermore, when the width of the film increases, the cutter bends, so that the cutter does not uniformly enter the film to be cut, and the ends of the film become disordered.

Aiming at solving these problems, various methods using traverse cutting have been tried in the past, but the cutting limit film running speed, the reliability of cutting, and the shape of the cut film ends have not been satisfactory. In other words, conventional traverse cutting methods include cutting the film in mid-air while moving the cutter horizontally in the film width direction, and cutting the film by pressing the cutter against the winding core while moving the film laterally (hereinafter referred to as traverse cutting). (referred to as score cut) is known. In the former method, in order to ensure that the film to be cut can be wound around the take-up core, a cutter is generally placed in the middle of the film to create a ribbon-like narrow film in the running film. However, a method is adopted in which the ribbon-shaped film is first wound around a winding core (for example, Japanese Patent Publication No. 52-29388). After winding this ribbon-like film around a winding core, the cutter is traversed,
The ends of the film cut by the traverse are sequentially wound around a winding core. The ribbon-shaped film is usually cut by a cross-cut method before the cutter traverses the film, and is first wound around a winding core.

Further, as prior art related to the present invention, although not related to cutting a single sheet-like film, a method for cutting a tubular film into two sheet-like films is disclosed in Japanese Utility Model Publication No. 51-40550, Japanese Patent Publication No. 32 Publication No. 8936 discloses a method in which two single sheet-like films are kept in a stacked position by supporting the edges of the film and stretching a tubular film at a position immediately in front of a cutter for cutting the film. Disclosed.

[Problems to be Solved by the Invention] However, in the conventional aerial cutting traverse cut method as shown in the above-mentioned Japanese Patent Publication No. 52-29388, the entire width of the film is wound while the ribbon-shaped film is being wound. Since it is not possible to do this, there is a problem that there is a large amount of film loss during that time. In addition, ribbon-shaped film has a small width, so it is easily torn off by the winding tension of the winding core.Furthermore, since the cutter is traversed in the air, large wavy wrinkles may occur in the film as it travels. There was also the problem that the film was easily torn, and the reliability of cutting the film was insufficient. Furthermore, in addition to the traverse cutter device, a cross cutter device is required to cut the ribbon-shaped film first, which complicates the structure of the film cutting device as a whole, and it is necessary to control the operating order of the cross cut and traverse cutter. There was also the problem that the control system became complicated.

On the other hand, the above-mentioned score cut has the problem that the cutter is pressed directly against the winding core, causing damage to the winding core, and in order to prevent this winding core from being scratched, the winding core is coated with ceramic or the like. The problem was that the costs were extremely high. In addition, score cutting has the problem of severe wear of the cutters and short life of the cutters, and the cutter's contact with the winding core generates heat, which has a negative effect on the end surface of the cut film, so the cutter traverse speed is usually kept low. Therefore, there was a problem that it could not be applied to high-speed winding, considering the loss of film during film cutting.

Furthermore, Publication No. 40550 of 1983, Special Publication No. 32-
Although the technique disclosed in Publication No. 8936 has a member that supports the film before cutting, the object to be cut is the edge of the tubular film, and the cutter is stationary so that the traveling film is cut by the stationary cutter. Moreover, since the cutting direction is the longitudinal direction of the film, the target and cutting direction are completely different from the present invention. Even if the above-mentioned known technology is applied to the transverse cutting of a single sheet-like film, which is the object of the present invention, the direction of action of the cutting force of the cutter and the direction of the film supporting force by the film supporting member before cutting are Since the directions are the same with respect to the film surface, there is a problem in that the film supporting member is more likely to give unnecessary deformation to the film just before cutting. That is, the above-mentioned known technique can be used only for edge cutting of a tubular film, and cannot be used for transverse cutting of a single sheet-like film, particularly for high-speed transverse cutting.

In order to solve the above-mentioned problems with the conventional aerial traverse cut or score cut, the present invention has been developed to provide a film that can be cut reliably even during high-speed winding and that can be traverse-cut at high speed to minimize winding loss. The object of the present invention is to provide a cutting method and a device thereof.

[Means for solving the problem] The film cutting method of the present invention that meets this objective is as follows:
While winding the continuously conveyed film onto one winding core, the next winding core is moved to the film winding position, and a cut is made between the first winding core and the next winding core. cutting the film running toward the first winding core in the width direction by moving the film across the width of the film, and winding one side of the cut film around the next winding core. In a film cutting method using a film winder, the cutter is oriented in its transverse forward direction and its cutting edge is tilted in a direction that gradually separates from the film surface, thereby changing the direction of the cutting force applied from the cutter to the film from one side of the film to the other side. A spatula that faces in a constant direction toward the side, and that runs along with the cutter and gradually extends away from the film surface in the direction of forward movement of the cutter, is used to cut the film immediately before the film cutting position in the cutter traversal direction and where the cutting force by the cutter is applied. While supporting the running film from the film surface opposite to the film surface where the film begins to hang, the cutter is running parallel to the winding core at a position immediately after the next winding core in the film running direction. The film cutting method is characterized in that the film is cut across the entire width in the width direction.

Further, the film cutting device directly used for carrying out the method of the present invention is a turret type film winding machine to which a plurality of winding cores can be attached and the winding cores can be rotated between a film winding position and a core take-out position. (a) The blade is capable of traversing parallel to the winding core at a position immediately behind the film traveling direction with respect to the winding core positioned at the film winding position, and the cutting edge gradually moves the film as it moves in the traversing forward direction. (b) a cutter for cutting the film tilted in a direction away from the surface; (c) a spatula extending away from the knife and supporting the film to be cut by the cutter from the film surface opposite to the film surface from which the cutting edge of the cutter gradually separates; It consists of a device equipped with: a driving means for moving the vehicle horizontally; and a device comprising:

[Function] In the present invention, since the film cutting position is set immediately after the winding core and in the vicinity of the winding core, the cutting cutter that travels sideways cuts the film in a portion that is supported in contact with the winding core surface and has almost no wrinkles. It turns out.
In addition, due to the spatula that precedes the cutlet,
The film to be cut is supported just before the cutting position in the transverse direction of the cutter, so even if the film is partially slack or uneven in thickness, it can be maintained in the optimal posture and flat state for cutting even with moderate tension at the cutting position. This allows for easy and reliable cutting. In addition, since the spatula supports the running film from the film surface opposite to the film surface where the cutting force from the cutter begins to act, the force applied from the cutter to the film and the force applied from the spatula to the film are opposed to each other. However, the posture of the film immediately before cutting is extremely stable. Furthermore, since the cutting edge and spatula of the cutter are tilted in a direction away from the film surface as the cutter moves laterally, the cutting edge and spatula form a wedge shape that gradually opens in the cutting direction. Therefore, the film in between is cut exactly at the root point of the wedge shape. Relatively speaking, the film just before cutting enters the wedge shape toward its root, so the closer it gets to the cutting point, the more stable its posture is, and it is restrained in a predetermined positional relationship with the cutter, making it the most stable. It will be cut at the base of the stabilizing wedge. Therefore, from this point of view as well, stable cutting performance at high speeds is improved.

Since such reliable cutting is performed close to the winding core as described above, even if the ribbon-shaped film is not wound around the winding core first, the cut end of the film will not be disturbed and can be easily and reliably cut by static electricity. is wound around the winding core.

Furthermore, since the cutter only needs to be moved in a non-contact state with the winding core, no heat is generated due to contact with the winding core.

[Embodiments] Hereinafter, preferred embodiments of the film cutting device of the present invention will be described with reference to the drawings.

FIG. 1 shows the winding section of a turret type film winder, in which the transported film 1 is wound up to a certain length on the winding core 2 at the film winding position A. is turreted together with the winding core 2 to the core take-out position B by the turret arm 3. At this time, the next winding core 2a is located at the winding position A, and the running film 1 is cut in the width direction and wound around the winding core 2a, and the next winding is started.

In order to maintain the winding angle θ of the film around the winding core 2a when cutting the film, a guide roll 5 and an enveloper arm are rotatably supported by a pair of enveloper arms 4 provided in a direction perpendicular to the plane of the paper. An arm 6 swingably supported at the tip of the arm 6 and a guide roll 7 rotatably supported at the tip of the arm 6 move the winding core 2a from below to above the winding core 2a at intervals. It is moved by an envelope arm 4 which is rotated about a fulcrum 4' to open and cover.

A cutter traversing device 8 is attached to the arm, and the cutter traversing device 8 includes a cross-sectional stay 9 attached across the pair of arms 6, and a stay 9, as shown in FIGS. 2 and 3. A pair of rails 10 extend parallel to the winding core 2a along the longitudinal direction and are attached to the upper and lower portions of the stay 9 to face each other. A running piece 12 having four wheels 11 and freely running along the rail 10, and a belt 13 having both ends fixed to both sides of the running piece 12 and stretched along the longitudinal direction of the rail 10. , a pulley 14 that supports the belt 13 at both ends thereof, and a pulley 1 (not shown)
It consists of four drive devices. Therefore, the running piece 12 is run parallel to the winding core 2a by the belt 13.

A plate-like member 15 is attached to the lower part of the running piece 12 and extends downward from the running piece 12. As shown in FIG. A holder 16 is attached to the core 2a that extends diagonally upward.

A thin cutter 17 is attached to the tip of the holder 16 with its cutting edge oblique to the plane of the film. The cutter 17 is the lowest end 1 of the cutter cutting edge.
It is attached so that the position 7a traverses the position immediately after the film 1 leaves the winding core 2a in FIG. 2, that is, the position extremely close to the winding core 2a. The cutter 17 is arranged so that the film is cut at the cutting edge 17b slightly above the lowermost end 17a of the cutter, that is, in FIG. 3, the lowermost end 17a of the cutter is located slightly below the extension surface C of the film path surface. It is installed as follows. Furthermore, since the cutter 17 is attached to the plate surface of the holder 16, it is attached at a certain angle with respect to the running direction X of the film 1 and the transverse direction Y of the cutter, as shown in FIG. There is.
The cutter 17 is tilted so that its cutting edge 17b gradually moves away from the film surface, that is, gradually moves upward in the forward direction Y of the cutter traverse.

A spatula 18 having a plate bent into a substantially L-shape is attached to the diagonally extending portion of the holder 16, and the bottom plate portion 18a of this spatula gradually moves away from the film surface in the forward direction of the traverse movement of the cutter. In other words, it extends gradually downward. The bottom plate portion 18a of the spatula 18 is configured to slightly advance the cutter 17 and to enter between the film 1 and the winding core 2a while contacting the film 1 when the cutter is running.

In addition, the traveling piece 12, the member 15, the holder 16
is made of a lightweight material, such as aluminum, in consideration of high-speed running controllability, and the spatula 18 is made of film 1.
And it is made of a rust-free and tough material, such as stainless steel, in consideration of contact with the core 2a.

The film cutting method of the present invention is carried out as follows using the film cutting apparatus of the present invention having the above-mentioned configuration.

Before cutting the film, as shown in FIG. 1, the film path is made such that the film 1 contacts the take-up core 2a with a sufficient winding angle θ by the guide rolls 5 and 7, and the film is cut. Then, preparations are made for winding around the winding core 2a. In this state of the film path, the cutter traversing device 8 moves the cutter 17 together with the holder 16 and spatula 18 in the Y direction in FIG. 5, and the film 1 traveling in the X direction is traversed.

As shown in FIG. 5, a locus 19 of the film cutting portion 17b of the cutter 17 during this film cutting is shown.
is the peeling line 20 from the winding core 2a of the film 1.
The line is located extremely close to and parallel to the peeling line 20. Therefore, the uncut film 1, which is in contact with and supported at a constant winding angle on the surface of the winding core 2a and in close contact with the wrinkles smoothed out, is peeled off from the winding core 2a, that is, the film 1. Since the film is cut at a part of film 1 that has almost no wrinkles and is supported by the surface of the winding core 2a in the vicinity, the film 1 can be traverse cut without any tearing or the like. be done. Moreover, since the film is reliably cut, even if it is traversed at high speed, the cut end surface will not be disturbed and problems such as film tearing will not occur.

Further, the film 1 just before cutting is supported by the spatula 18 from the lower surface of the film, so even if there is partial slack or uneven thickness in the running film, the film will maintain appropriate tension at the cutting position. This will maintain the desired posture and flat state for cutting. Moreover, since the cutting edge 17b of the cutter 17 is inclined in a certain direction, the cutter 17 applies a cutting force to the film in a certain direction, that is, from the top surface to the bottom surface of the film, but the spatula 18 acts on the film in the above-described manner. The cutter 17 and the spatula 1 are disposed on the opposite side of the film from the surface on which the cutting force from the cutter 7 begins to act.
8, the film is held in a wedge-like state, further improving the ease of cutting. As a result, the film 1 can be cut easily and reliably, further increasing the reliability of cutting.

In addition, in the case of the film 1 immediately after cutting, the film peeling line 2 between the cut end face of the film and the winding core 2a is
0, and the film 1 and take-up core 2a are very close to each other, so the end of the film, which is momentarily released into the air immediately after cutting, is not pushed out into the air and is easily removed. Due to the static electricity, the winding core 2a is tightly wound onto the surface of the winding core 2a. Therefore, there is no need to cut and form a ribbon-like film as in the conventional method.

Note that the cutting edge 17b of the cutter 17 and the winding core 2a
The distance from the film peeling line 20 to the winding core 2a is
There is a relationship between the diameter of the film and the running speed of the film, but the distance may be within a distance that can be wound around the winding core 2a by static electricity as described above.

Furthermore, the cutter 17 itself is
Although it is located very close to a, it is maintained in a non-contact state, so no heat is generated due to contact with the winding core, and no significant wear occurs due to contact of the blade surface with the winding core.

[Effects of the Invention] As described above, the following various effects can be obtained by using the film cutting method and device of the present invention.

First, the film cutting position was set extremely close to the winding core, the cutter and spatula were tilted in a predetermined direction, and the film was supported by the spatula from the back side in the direction in which the cutter cutting force was applied. It is possible to cut the film at the point where the posture and support of the film at the base of the wedge shape formed by you can get
Furthermore, the cut film can be reliably wound around the winding core.

In addition, as mentioned above, good cutting and winding performance on the winding core can be obtained, so there is no need to wind up a ribbon-like film as in the conventional aerial traverse cut. Transverse traverse cuts are possible,
Film loss during film cutting can be minimized.

[Brief explanation of the drawing]

1 is a side view of a winding section of a turret type film winder equipped with a film cutting device according to an embodiment of the present invention; FIG. 2 is a side view of a film cutting section of the device shown in FIG. 3 is a front view of the device shown in FIG. 2, FIG. 4 is a perspective view of the cutter portion, and FIG. 5 is a plan view of the device shown in FIG. 2. 1... Film, 2, 2a... Winding core, 5,
7...Guide roll, 8...Katsuta traverse device, 9
...stay, 10...rail, 11...coro, 1
2... Traveling piece, 13... Belt, 16... Holder, 17... Cutter, 17a... Lowermost end of cutter, 17b... Film cutting position of cutter, 18
. . . Spatula, 19. Traversal locus of the cut portion of the film by the cutter, 20.. Film peeling line of the winding core.

Claims (1)

[Claims] 1. While winding the continuously conveyed film onto one winding core, the next winding core is moved to the film winding position, and the first winding core and the next winding core are moved to the film winding position. By moving the cutter in the width direction of the film between the cutter and the take-up core, the film running toward the first take-up core is cut in the width direction, and one side of the cut film is cut into the next one. In a method for cutting a film using a film winding machine for winding it around a winding core, the cutter is oriented in its transverse forward direction and the cutting edge is gradually tilted away from the film surface to control the direction of the cutting force applied from the cutter to the film. The cutter is cut in a fixed direction from one side of the film to the other side, and the spatula moves along with the cutter and gradually extends away from the film surface in the direction of forward movement of the cutter. While supporting the running film from the film surface opposite to the film surface where the cutter begins to apply the cutting force, the cutter is connected to the winding core at a position immediately behind the next winding core in the film running direction. A film cutting method characterized in that the film is cut across the entire width in the width direction while the film is traveling in parallel. 2. In a turret type film winder which can be equipped with a plurality of winding cores and which can be rotated between a film winding position and a core take-out position, (a) a winding core located at the film winding position; On the other hand, there is provided a film cutting cutter which can be traversed in parallel with the winding core at a position immediately behind the film running direction, and whose cutting edge is inclined in a direction gradually moving away from the film surface as it faces in the traverse forward direction. ) The film that is cut by the cutter is traversed with the cutter, extends at least to a position preceding the cutter in the traversal direction of the cutter, and gradually extends away from the film surface in the forward direction of the traversal cutter, and is cut by the cutter. a spatula supported from the film surface opposite to the film surface from which the cutting edge gradually separates; and (c) driving means for moving the cutter and spatula across the entire width of the film. Cutting device.