JPH0688699B2 - Automatic cutting and winding device for strips such as films - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is applied to, for example, a biaxially stretched film manufacturing apparatus, a non-stretched film manufacturing apparatus, etc., to automatically cut a strip of film or the like and continuously. The present invention relates to a device for automatically cutting and winding a belt-like material such as a film that can be rewound and used for winding paper, cloth, and the like.

(Prior Art) A method of directly winding a strip-shaped material such as a film (hereinafter referred to as a film) around a core without using an adhesive tape or other adhesive force applied to the core (hereinafter referred to as tapeless winding). The one called () does not damage the inner layer film of the mill roll due to the unevenness of the core surface due to the adhesive tape or the like, and the work of removing the remaining sticky substances at the time of reusing the core is not necessary, so it is attracting attention in various fields. However, since there are problems such as scratches on the cut end of the film, the development of a more perfect one has been strongly desired.

An outline of a conventional tapeless winder will be described below with reference to FIGS. 7 to 9. 1 is a film, 2 is a core, and the core 2 is a turret 4 which is rotated in a direction indicated by an arrow A by a driving device (not shown). It is installed to do.
3 is a guide roll, 90 ° C with the core 2 of the turret 4
It is rotatably supported by the ends of arms 4a provided separately. Reference numeral 5 is also a guide roll, but this guide roll 5 is pivotally supported on the film 1 supply end of the frame 10, and traverses the intermediate portion between the guide roll 5 and the core 2 and turns in the direction B in the figure. A winding roll 6 is provided, and the roll 6 is pivotally supported on the tip of a swing arm 7.
The other end of the swing arm 7 is pivotally supported on the film winding side of the frame 10.

As described above, the winding roll 6 traverses the intermediate portion between the guide roll 5 and the core 2 and reaches the rear side of the core 2.

Reference numeral 8 is a cutter, the other end of which is attached to the tip of an arm 9 which is also pivotally mounted at a proper position on the frame 10. The arm 9 is rocked by a drive device (not shown) in synchronism with the rotation of the winding roll 6. The cutter 8 at the tip portion thereof cuts the film 1.

Now, in FIG. 7, the film 1 is wound around a core (not shown) attached to the other end of the turret 4, and when the mill roll wound by the core reaches the full capacity, The winding roll 6 turns in the direction of the arrow B, and the film 1 holds the core 2 in the state shown in FIG.

Next, as shown in FIG. 9, the cutter 8 is lowered to cut the film 1, and the film end a is attached to the core 2 and the winding roll 6.
Then, push it into the part b between the two to finish the winding.

However, in the case of the above-mentioned conventional case, since the cut film end a is wound at the time of rewinding to the new core,
As shown in FIG. 8, it was necessary to wrap the core 2 with the film 1 before cutting, but the film 1 was generated due to the winding between the winding roll 6 and the guide roll 3 in FIG. In order to reach the state shown in FIG. 8 from the state shown in FIG. 7 with a certain tension, an excessive force is applied to the film 1 in order to prevent breakage, meandering, wrinkling, etc. It was necessary to move the roll 6 gradually over time.

However, the surface of the core 2 is not smooth like a smooth roll,
Moreover, the surface speed of the core 2 is set to be slightly higher than the speed of the film in order to prevent the slack of the film immediately after winding, so that slip may occur between the film 1 and the core 2 and scratches may occur on the film 1. There was Therefore, the portion rubbed by the core 2 cannot be handled as a product, and the loss increases as the film speed increases.

By the way, as shown in FIG. 9, the film 1 is supported by the core 2 and the guide rolls 3, the arm 9 descends, and the cutter 8 enters the film 1 and cuts as described above. The cutter 8 normally has a saw-tooth shape as shown in FIGS.

(Problems to be Solved by the Invention) In the conventional film winder shown in FIG. 7, in order to obtain a good cut surface of the film material, the sharpness of the cutter is good, and the higher the traveling speed of the film is It was necessary to take measures such as increasing the operating speed of the cutter 8, increasing the tension of the film so that the film is not pushed away by the cutter during cutting, or having a means for supporting the film. If these measures are not satisfied, a strip-shaped uncut portion is generated in the cutting portion 9, as shown in FIG.
When wound around a new core, the strip-shaped portions of the cutting portion 9 are folded or overlapped to form irregularities, and the irregularities wrap around the upper layer to give the film 1 a concave-convex shape and rewind the film. The flatness of No. 1 is impaired, and many defective parts are generated. Length l of this defective cutting part
The longer the running speed of the film 1, the slower the cutter operating speed, and the lower the tension of the film, the longer the length of the defective film.

To cut the film, bring the cutter as close as possible to the new core, cut the film, and then push the film between the core and the winding roll to wind it.

However, in these methods, since the device for cutting the film inevitably moves up and down with respect to the film, the positional relationship to the core, that is, the reason that the cutter prevents the cutter from colliding with the core, is the distance from the core. It has a fatal flaw that it must have That is, the film cut by this slight distance is completely unconstrained in the portion of this distance (the portion more than that when the winding speed is fast), and when it is wound around the core, wrinkles are generated or folded. It will get wrapped up.

In addition, the cutting cutter needs to have sufficient strength and rigidity to support itself by receiving the impact of cutting across the entire width of the machine. In order to meet these requirements, the prior art device must be of a robust construction and therefore its weight and inertia are also high. This causes problems such as making it difficult for the cutter to operate at high speed.

The present invention has been proposed to solve the above-mentioned conventional problems.

(Means for Solving the Problems) Therefore, according to the present invention, a pressing roll that comes into contact with the core by swinging to press the strip of film or the like, and a swingable arm that is mounted on the strip of the strip of film or the like are attached. A static charge imparting means for imparting a static charge to the cut end or the core surface, a support member that swings to contact the strip-like material to support the strip-shaped material, and a strip-shaped film having a cutter attached to a swingable arm. In a turret type winding device for automatically cutting and winding an object, the cutter is attached to another arm rotatably supported around an axis at a tip end of a swinging arm and provided so as to rotate at high speed. , When the cutting arm is swung, the swivel arm swings through the other arm to enter the space between the pressing roll and the support member that is in contact with the strip of film or the like, thereby cutting the strip of film or the like. like This is a means to solve the problem.

(Function) When rewinding the film, the film is pressed against the core by the press roll, and the supporting member that supports the film at the time of cutting is made to stand by in the vicinity of the core, during which the cutter penetrates along the surface of the core and the tension of the film is increased. Cut the film up. Simultaneously with the cutting, an electrostatic charge is applied to the film cut end or the core surface to attach the film cut end to the new core surface, and at the same time, winding is started.

(Embodiment) The present invention will be described below with reference to embodiments of the drawings. FIGS. 1 to 6 show an embodiment of the present invention, in which 11 is a film and 12 and 13 are cores. 13 is rotatably supported at both ends of a turret 16 mounted on a frame 19 so as to be rotatable in the C direction shown in the figure so as to be rotatable in the A direction by an unillustrated driving device. Arms 18 and 18 are projectingly provided on both sides of the center of the turret 16, and guide rolls 17 and 17 are pivotally supported at the respective tip ends of the arms 18 and 18. 14 is a mill roll in which the film 11 is wound around the core 12.

Further, another frame 28 is installed on the film 11 supply side of the frame 19, the guide roll 27 is provided on the film feeding path of the frame 28, and the frame 28 is swung about the same axis D. Swing arms 23 and 26 are pivotally attached. A supporting member 24 is attached to the tip of the swing arm 23.

Further, the swing arm 26 has a presser roll 25 and an electrostatic charge applying means 2
0, air cylinder 31, sector gear 3 that swings around point E
3. Further, a pinion 29 is pivotally supported at the tip F point.
An arm 30 is pivotally attached to the shaft of the pinion 29, and a cutter 22 is attached to the tip of the arm 30. The swing arm
The electrostatic charge imparting means 20 may be attached to 23. Also, air cylinder 31, sector gear 33, pinion 29, arm 30, cutter
22 may be provided independently of the axis D of the frame 28.

The electrostatic charge imparting means 20 is of a known charging type by corona discharge and uses an electrode portion of an electrostatic charge imparting device. The power supply section and wiring of the same device are omitted in the figure.

The operation of the tapeless winding of the film 11 using the apparatus according to the embodiment of the present invention as described above will be described below. FIG. 1 shows that the mill roll 14 on the core 12 on the right side of the drawing is in a full state. The state at the time of reaching is shown. Then, the winding length is measured by a winding length counter (not shown), and when the winding length reaches a full amount, the arm 23 is activated, the supporting member 24 is made to stand by at the position shown in FIG. 3, and then the swing arm 26 is activated. When the film 11 is pressed against the new core 13 by the presser roll 25 and the air cylinder 31 is activated at the same time, the arm 30
Is accelerated by the sector gear 33 and pinion 29, and the cutter 22
Moves at a high speed along the locus shown in FIG. 5 to increase the tension of the film and cut at a stretch.

Further, the support member 24 is brought as close to the core 13 as possible to shorten the film fulcrum distance from the pressing roll 25 at the time of cutting. The tension at the time of cutting increases, and it can be cut easily and cleanly. In addition, in order to increase the cutting speed, the movements of the support member 24 and the cutter 22 may be synchronized. Further, in order to improve the cutting effect, a heater (heating device) 32 may be attached to the cutter 22 as shown in FIG.

Simultaneously with the cutting, an electric charge is applied to the film cutting end a or the surface of the core from the electrostatic charge applying means 20, and the film is adsorbed to the core 13 to be wound, and automatic cutting and rewinding are performed without a tape. Further, by adopting a structure in which only the cutter portion is rotated, the weight of the cutter portion can be reduced. That is, it is necessary to move to disconnect
Since only the cutter 22, the air cylinder 31, the sector gear 33, and the small arm 30 are used, it is possible to easily increase the cutting speed and the cutting ability by selecting the air cylinder and the lever ratio.

Next, when winding is completed, the arm 23 is moved to the air cylinder 31
Is started to return to the state of FIG. 4, and the mill roll 15 and the film 11 are wound on the new core 13.

In the above embodiment, the pressing roll 25 can be used as a reion roll for controlling the winding hardness of the mill roll.

Further, as the electrostatic charge imparting means, a blowing type electrostatic charge imparting means may be adopted.

(Effects of the Invention) As described in detail above, according to the present invention, the film can be attracted to the core to be wound by applying an electric charge to the surface of the film or the core at the same time as cutting the film. It is not necessary to embrace the core with the film before cutting, and there is no film that comes into contact with the core at the end of the mill roll winding to be scratched and becomes a loss, and the yield of the film is greatly improved.

In addition, a cutter rotation shaft is provided, and the cutter is attached to another arm rotatably supported around the shaft at the tip of the swing arm so that the cutter can move at high speed. Instead of being cut by the rotating mechanism and wrapped around the core, it is wrapped around the new core by the electrostatic charge imparting means. For this reason, unlike the case of cutting the conventional film by wrapping it in the core, there is no defect that the film is scratched by the core whose surface is roughened by the film cutting knife, and therefore the loss of the under-winding film is extremely reduced. Can be reduced to As described above, the film is smoothly adsorbed on the core surface at the same time as cutting, and separation or floating does not occur from the surface. This eradicates the wrapping phenomenon at the end of the film and prevents wrinkles due to wrapping, so it exerts a remarkable effect in improving the yield of the mill roll and making the winding appearance beautiful. Further, since the supporting member and the cutter are disposed so as to face each other near the cutting position of the film and the cutting speed is increased, the film is cut by the cutter without breaking, and the film cutting end is shown in FIG. The shape is improved. Therefore, there is an effect of remarkably reducing defective portions of the film when the film wound on the mill roll is used after being unwound. The above effect becomes more remarkable as the cutting and winding speed increases.

[Brief description of drawings]

FIGS. 1, 3 and 4 are side views of an automatic cutting and winding device for a belt-shaped film or the like showing an embodiment of the present invention in which the operating states are different, and FIG. 2 is a portion H of FIG. FIG. 5 is a detailed view, FIG. 5 is a side view for explaining the operating state of the main parts in FIG. 1, FIG. 6 is a cut end view of the film according to the present invention, and FIG. Side view of the eighth
The figure is the same as above, and the rewind preparation state diagram is shown.
FIG. 10 is a plan view of a conventional cutter, FIG. 11 is a side sectional view of FIG. 10, and FIG. 12 is a plan view showing a cut end shape of a film by a conventional device. Description of main parts of the drawing 11 ... Film 12, 13 ... Core 16 ... Turret 20 ... Static charge imparting means 23 ... Cutter 24 ... Support member 25 ... Press roll 29 ... Pinion 33 ... Sector gear 23, 26, 30 ... Arm

Claims (1)

[Claims] 1. A pressing roll that comes into contact with a core by swinging to press a strip of film such as a film, and a static roller that is mounted on a swingable arm and gives an electrostatic charge to the cut end of the strip of film such as a film or the surface of the core. A turret type winding device for automatically cutting and winding a charge-giving means, a supporting member that swings to contact a strip-shaped material such as a film to support the strip-shaped material, and a cutter attached to a swingable arm for automatically cutting the strip-shaped material. In the picking device, the cutter is attached to another arm that is rotatably supported about the shaft at the tip of the swing arm and is provided so as to rotate and move at high speed. Automatically cutting a strip of film or the like characterized by cutting the strip of film or the like between the pressing roll and the support member that are in contact with the strip of film or the like by rotating and entering through the other arm. roll Apparatus.