JP2781674B2 - Automatic film winding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic film winding device used in an emergency winding device between a longitudinal stretching machine in a biaxially stretched film production line and a tenter oven for transverse stretching.

[0002]

2. Description of the Related Art Generally, in a biaxially stretched film production line, when a film of a material in a tenter oven for transverse stretching is fed and in a transverse stretching process, the temperature distribution in the oven is suitable for film characteristics. Otherwise, the film may not be stretched uniformly but may be torn in the vertical direction from the thinned portion due to the incorporation of foreign matter. Therefore, in this case, the paper had to be restarted from the entrance of the tenter oven.

[0003] Therefore, it is necessary to cut the supplied film just before the transverse stretching, wind it up on a scrap roll, and immediately remove the film in the oven. As a conventional example of a mechanism for cutting a film between a vertical stretching machine and a horizontal stretching section, the mechanism shown in FIG. 6 has been proposed. In FIG. 6, the normal film 3 exits from the vertical stretching machine 1 and is sent to the horizontal stretching machine 2 through the space between the rolls 4, 5, and 6, as indicated by a two-dot chain line. At this time, the film 3 is approached to the scrap roll 7 by the pass roll 9, and the film 3 supported by the pass roll 9 and the touch roll 10 is cut off by a cutter 8 having a saw blade and full width. The cut end is pressed against a scrap roll 7 (having vacuum suction or a double-sided adhesive tape) to wind up the film 3.

[0004]

The film before longitudinal stretching after the longitudinal stretching by the conventional longitudinal stretching machine shown in FIG. 6 is still thick, and the film after the longitudinal stretching generally depends on the material, but generally in the transverse direction. Since the film is difficult to cut, a cutter having the full width of the film is likely to be damaged by cutting, and it is difficult to automatically wind the film.
The feed speed of the transverse stretching is set slightly higher than the film speed of the longitudinal stretching machine so that a constant tension is applied to the film between the longitudinal stretching and the transverse stretching.

When the pass roll 9 in FIG. 6 comes down to bring the film 3 closer to the scrap roll 7, the distance over which the film 3 passes becomes longer, so that the film feed speed of the horizontal stretching machine 2 must be temporarily reduced. At the time of cutting, the film speed must be increased again in order to impart tension to the film. Moreover, since the film feeder of the horizontal stretching machine is large and heavy, it takes considerable time to decelerate and increase the speed, the amount of film that becomes scrap increases, and the operating rate decreases. there were. The present invention has been proposed to solve the above-mentioned conventional problems.

[0006]

SUMMARY OF THE INVENTION For this reason, the present invention provides a moving film which can move in opposite directions in the width direction of the film.
A film cutting mechanism having a pair of cutter knives, a first pass roll for bringing the film closer to the cutting position of the cutter knife, and a scrap for moving the first pass roll so that the film is not loosened and simultaneously driving the film to rotate. A second pass roll approaching the roll to a winding position, and a crossing cutter for crossing the film between slits of the film cut by the cutter knife when the second pass roll approaches the scrap roll;
A touch roll that is attached to a support member of the second pass roll, moves together with the second pass roll, and presses a ribbon-shaped film end traversed by the transverse cutter against a scrap roll, wherein the scrap roll is The end of the ribbon-shaped film can be adsorbed or adhered, and is used as a means for solving the problem.

[0007]

First, the first pass roll and the second pass roll move at the same time to change the path of the film, and the film comes into contact with the tip of the cutter knife to make two vertical slits near the center of the film. Next, at the same time as the transverse cutting cutter cuts the ribbon-like film between the longitudinal slits of the film, the touch roll presses the cut end of the film against the suction or adhesive surface of the scrap roll, and winding of the scrap roll starts. The cutter knives then spread laterally in opposite directions to cut the film into eight figures.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to FIG. 5 show an embodiment of the present invention. FIG. 1 is a drawing showing a biaxially stretched film production line between a longitudinal stretching machine and a transverse stretching machine. The installed film automatic winding device is shown, and FIGS. 2 to 5 show the operation sequence of the device. In FIG. 1, a film 3 is stretched in a longitudinal direction by a longitudinal stretching machine 1 and is sent to a feed roll 4 in a direction indicated by an arrow. When the film 3 is being processed smoothly, the film 3 is moved from the feed roll 4 to the first pass roll 16 and the feed roll 1 as shown by the solid line.
After passing through 5, 5, and 6, it is sent to the horizontal stretching machine 2 (tenter oven).

However, when an accident occurs after the horizontal stretching machine 2 and the film 3 is cut in front of the horizontal stretching machine 2, the path through which the film 3 passes is indicated by a two-dot chain line in FIG. That is, the film 3 passes through the feed roll 15 from the position of the first pass roll 16 shown by the two-dot chain line from the feed roll 4, passes through the second pass roll 17 and the feed rolls 5 and 6 shown by the two-dot chain line, Sent to. The first pass roll 16 is supported by the first operation arm 18 and is rotated by the actuator 23 in the direction A about the X axis. The cutter device 21 is installed so that the edge of the cutter knife 28 pierces the film 3 when the film 3 is moved to the position indicated by the two-dot chain line by the second pass roll 17.

The second pass roll 17 includes a second operating arm 19.
, And is rotationally moved in the B direction around the Y axis by the actuator 24. Second pass roll 1
7 moves to the position indicated by the two-dot chain line, the film 3 approaches the scrap roll 7, and at the same time, the second operating arm 1
Touch roll arm shaft 2 attached to rotate to 9
The touch roll 20 on the other side of the film 3 which has approached the scrap roll 7 also has a torsion spring 26 shown in FIG.
Press lightly by the action of The touch roll 20 is stopped by a stopper (not shown) so as not to rotate excessively, and the scrap roll 7 is driven in a torque range determined by a motor 27. Further, a double-sided adhesive tape having an appropriate width is wound around the outer periphery of the center of the scrap roll 7. Numeral 22 denotes a transverse cutter which crosses the ribbon-shaped film between two vertically cut slits when the film 3 is cut. The transverse cutter 22 is operated by an actuator 25.

Next, the operation of the automatic film winding apparatus shown in FIG. 1 will be described with reference to FIGS. FIG. 2 shows a state in which the film 3 is fed in the direction of the arrow without any trouble. However, if a trouble occurs in the process after the transverse stretching, the actuators 23 and 24 are simultaneously operated, and the first operation arm 18 and the second operation The arm 19 rotates in the directions A and B about the axes X and Y, respectively, and the state shown in FIG. 3 is obtained.

At this position, the film 3 is placed on the cutter knife 28.
To form two slits 3a in the vertical direction.
Next, the scrap roll 7 starts rotating in the direction C at a peripheral speed slightly higher than the film speed. In this position, the touch roll 20 remains on the film 3 and does not yet contact the scrap roll 7. Next, the crossing cutter 22 is actuated by the actuator 25 and starts rotating in the direction of arrow D.

FIG. 4 shows a state immediately after the ribbon-shaped film between the slits 3a of the film 3 is crossed by the crossing cutter 22. Reference numeral 3b denotes a transverse end of the film 3. Further, the touch roll 20 presses the ribbon-shaped film end 3b against the scrap roll 7 by the torsional force of the torsion spring 26, and the double-sided adhesive tape attached to the outer periphery of the scrap roll 7 adheres to the film end 3b and starts winding. . Next, the pair of cutter knives 28 attached to the cutter device 21 starts to move in opposite directions, that is, in the directions indicated by arrows.

FIG. 5 shows a state in which the pair of cutter knives 28 has moved to both ends of the cutter device 21 and the oblique cutting of the film 3 has been completed.
The scrap roll 7 continues to wind the film until the trouble of the next process is resolved and the paper re-feeding is started. 3c in FIG. 5 shows an oblique cut end of the film. Next, the first pass roll 16,
The second pass roll 17 and the transverse cutter 22 are in their original positions (FIG. 2).
Position). The cutter knives 28 also approach each other and return to the original position shown in FIG.

As another embodiment, a scissor knife for opening and closing a knife portion by an actuator is installed in place of the transverse cutting cutter 22, and the touch roll 20 is installed inclined with respect to the film surface. When contacting the film 3, the film surface may be twisted and cut with the knife. Further, instead of the crossing cutter 22, a normal rotary cutter can be used. On the other hand, these crossing cutters may be located at any position on the downstream side of the touch roll 20, and need not necessarily be attached to the arm of the second pass roll 17, and the same effect can be obtained by a fixed type. In this case, the slit 3a is wound around the scrap roll 7 a lot, and there is no problem at all.

[0016]

As described above in detail, according to the present invention, the width of the crossing cutter is small, and cutting can be reliably performed with a small cutter. Further, since it is not necessary to reduce or increase the film feeding speed of the transverse stretching, the time required for cutting the film is shortened, the scrap of the film is reduced, and the operation rate of the production line is increased.

[Brief description of the drawings]

FIG. 1 is a side view of an automatic film winding device according to an embodiment of the present invention.

FIG. 2 is a perspective view illustrating an operation state of FIG. 1;

FIG. 3 is a perspective view showing an operation state different from that of FIG. 2;

FIG. 4 is a perspective view of the operating state following FIG. 3;

FIG. 5 is a perspective view of the operating state following FIG. 4;

FIG. 6 is a side view showing a conventional film winder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical stretching machine 2 Horizontal stretching machine 3 Film 7 Scrap roll 16 1st pass roll 17 2nd pass roll 20 Touch roll 21 Cutter device 22 Horizontal cutting cutter 28 Cutter knife

Claims (1)

(57) [Claims] 1. A film cutting mechanism having a pair of cutter knives capable of moving in opposite directions in a width direction of a running film, a first pass roll for bringing the film closer to a cutting position of the cutter knives, A second pass roll for moving the film so as not to be loosened by the movement of the one pass roll, and at the same time, approaching a scrap roll for driving the film to rotate and leading to a winding position; and a cutter when the second pass roll approaches the scrap roll. A transverse cutter that traverses the film between the slits of the film cut by the knife; and a ribbon-shaped member attached to the support member of the second pass roll, moved together with the second pass roll, and traversed by the transverse cutter. A touch roll for pressing the end of the film against the scrap roll. An automatic film winding apparatus characterized in that an end portion of a film-shaped film can be adsorbed or adhered.