JPH0671957B2 - 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) When winding a band such as a film (hereinafter referred to as a film), a method in which the core is directly wound around the core without using an adhesive tape or other adhesive force (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. 5 to 7. 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, which is rotatably supported by the end of an arm 4a which is provided 90 ° apart from the core 2 of the turret 4. 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. And the winding roll 6
As described above, the roller is swung across 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. 5, 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 a full amount, The winding roll 6 rotates in the direction of arrow B, and the film 1 holds the core 2 in the state shown in FIG.

Next, as shown in FIG. 7, 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. 6, 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. 6 from the state shown in FIG. 5 with a constant tension, an excessive force is applied to the film 1 in order to prevent breakage, meandering, wrinkling, etc. It was necessary to gradually move the roll 6 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 a slip occurs between the film 1 and the core 2 and scratches are generated on the film 1. There was a risk that Therefore, the portion rubbed by the core 2 cannot be handled as a product, and the loss increases as the film speed increases.

Now, as shown in FIG. 7, 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. In addition,
Normally, the cutter 8 has a saw-tooth shape as shown in FIGS. 8 and 9.

In the conventional film winder shown in FIG. 5, in order to obtain a good cut surface of the film material, the sharpness of the cutter is good, the operating speed of the cutter 8 becomes faster as the traveling speed of the film increases, At the time of cutting, it was necessary to take measures such as increasing the tension of the film so that the film is not easily escaped by the cutter, or a means for supporting the film was provided, but if these measures are not found As shown in FIG. 10, a strip-shaped uncut portion is generated in the cutting portion 9,
When wound around a new core, the strip-shaped portions of the cutting portion 9 are folded or overlapped to generate irregularities, and the irregularities are wound around the upper layer to give the film 1 an irregular habit and rewind. The flatness of the film 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.

(Problems to be Solved by the Invention) The present invention is intended to solve problems such as the generation of scratches on the cut end of a film in a conventional winder for winding a strip of film or the like, and the unevenness of the cut portion. Is.

(Means for Solving the Problems) For this reason, the present invention provides a swingable arm in a turret type automatic cutting and winding machine that automatically cuts and winds a band-shaped material such as a film with a pressing roll, a pressing member and a cutter. It is mounted and has electrostatic charge imparting means for imparting electrostatic charge to the upstream end of the cut end of a band-shaped object such as a film, and rotates the cutter and a pair of pressing members having a rocking acceleration mechanism facing the band-shaped object. The pressing member is arranged so as to be capable of advancing at high speed before and after the cutter that is waiting in advance at the cutting position, and this is a means for solving the problem.

(Operation) When the film is rewound, the swing arm swings, and the static charge imparting means mounted on the swing arm imparts an electric charge to the film cutting end or the core surface, and the film cutting end is moved to a new core. At the same time as attaching it to the surface, winding is started. Next, at the time of cutting the film, the cutter and a pair of pressing members opposed to each other with the film interposed therebetween press the film at both sides at high speed while supporting the film, thereby increasing the tension of the film and cutting the film.

(Embodiment) The present invention will be described below with reference to embodiments of the drawings. FIGS. 1 to 3 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 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, and the frame 28 swings around a guide roll 27 on the film feeding passage and the same frame 28 around the same axial extension D. Swing arms 23 and 26 are pivotally attached. A cutter 22 is attached to the tip of the swing arm 2.
Further, the swing arm 26 has a pressing roll 25, a pressing cylinder 32 including two sets of air cylinders 32a and 32b, and an electrostatic charge applying means 2
Wearing 0. Furthermore, at the tip of the swing arm 26, E
An arm 29 that also swings around a point is pivotally mounted, and a pair of pressing members 30 including a pressing bar 30a and a pressing rod 30b are attached to the tip of the arm 29. The arm 29 is connected to the arm 26 by a spring 33.
Is provided in the state shown in FIG. 1 or FIG. 2, and an impact force support member (not shown) is provided, and the pressing cylinder 32 and the spring 33 constitute a swing acceleration mechanism. Further, an air blowing nozzle 30c may be formed in the pressing member 30 so that the film end a is pressed against the core 13 by air as shown in FIG. Further, a heater 31 may be attached to the lower surface of the cutter 22 to heat the film above the melting point of the film to ensure cutting. Further, the electrostatic charge applying means 20 may be attached to the swing arm 23. Further, the electrostatic charge applying means 20 is of a known charging type by corona discharge and uses an electrode portion of an electrostatic charge applying 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 counter (not shown) measures the winding length, and when the winding length reaches the full amount, the arm 23 is activated, the cutter 22 is made to stand by at the position shown in FIG. 2, and then the swing arm 26 is activated. At the same time as the film 11 is pressed against the new core 13 by the presser roll 25, the air cylinder 32a is actuated by the signal from the control device (not shown) to project the rod, and the arm 29 is pushed up to rotate clockwise around the point E. , The spring 33 is rotated while increasing the deflection thereof until the dead point of the spring 33 is exceeded. When the arm 29 crosses the dead point of the spring, the arm 29 rotates by being rapidly accelerated to the cutting position of FIG. 2 by adding the recovery force of the spring 33 to the protruding speed of the air cylinder 32a. That is, the pair of pressing members 30 attached to the tip of the arm 29 presses the film 11 toward the cutter 22 at high speed to increase the tension of the film 11 and cut it at a stretch.

Simultaneously with this cutting, an electric charge is applied from the electrostatic charge applying means 20 to the film cutting end a or the core surface, and the film is adsorbed to the core 13 for winding, and automatic cutting and rewinding are performed without a tape. The air blowing from the air blowing nozzle 30c in FIG. 4 may be carried out at the same time as the charge application from the electrostatic charge applying means 20.

By adopting such a configuration, as shown in FIG. 2, since the film end a is minimized, the stopping position of the cutter 22 can be brought as close to the core 13 as possible. Further, the arm 29 having a short arm length and a small weight is pivotally attached to the end of the arm 26, and the cylinder 32 and the spring 33 are used in combination to enable a high-speed cutting with a small swinging motion. Next, when winding is completed, the arm 23 is activated to return to the state shown in FIG. 3, and the air cylinder 32b is activated.
The arm 29 is rotated counterclockwise and returned to the state shown in FIG. 3, and the mill roll 15 and the film 11 are wound on the new core 13.

Further, in the above embodiments, the pressing roll 25 can be used as a reion roll for controlling the winding hardness of the mill roll. Furthermore, as means for imparting electrostatic charge,
Blower type electrostatic charge imparting means may be adopted. Further, the distance between the presser bar 30a and the presser bar 30b may be made changeable so that the type and thickness of the film can be changed, and the air blowing nozzle can be provided separately from the presser member 30.

(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. In cutting, it is not necessary to wrap 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 cause scratches and loses, thereby significantly improving the yield of the film.

Further, according to the present invention, the cutter and the pair of pressing members provided with the rocking acceleration mechanism are rotatably arranged so as to face the belt-like object, so that the pair of pressing members rocked and accelerated at a high speed at the time of cutting. Since the film is pressed before and after the cutter,
The tension of the film increases and the film is pressed without escaping from the cutter. Therefore, the cut end of the film can be formed into a good cut shape, and the yield of the film can be improved. By combining this cutting means and a means for imparting an electrostatic charge to the cut end, stable tapeless winding can be performed.

[Brief description of drawings]

FIGS. 1, 2 and 3 are side views of an automatic cutting and winding apparatus for a belt-shaped film or the like showing an embodiment of the present invention in which the operating states are different, and FIG. 4 shows another embodiment. Side view of the main part,
FIG. 5 is a side view of a main part showing a film winding state by a conventional apparatus, FIG. 6 is a rewinding preparation state diagram of the same, FIG. 7 is a cutting state diagram of the same, and FIG. 8 is a plan view of a conventional cutter. FIG. 9 is a sectional view of the same side, and FIG. 10 is a plan view showing a cut end shape of the film by the cutter of FIG. Description of main parts of the figure 11 …… Film 12,13 …… Core 16 …… Turret 20 …… Static charge imparting means 22 …… Cutter 23,26,29 …… Arm 30 …… Pressing member 31 …… Heater 32… … Pressing cylinder 33 …… Spring

Claims (1)

[Claims] 1. A turret type automatic cutting and winding machine for automatically cutting and winding a band-shaped material such as a film by a pressing roll, a pressing member and a cutter, which is mounted on a swingable arm and is upstream of a cut end of the band-shaped material such as a film. A pair of pressing members having electrostatic charge applying means for applying electrostatic charge to the portion and having a cutter and a swing accelerating mechanism are rotatably arranged so as to face the belt-like object, and are waiting in advance at the cutting position. An automatic cutting and winding device for a belt-like material such as a film, characterized in that the pressing member is configured to enter at a high speed before and after the cutter.