JPH0416385B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a film winding method and an apparatus used to carry out the method.

(b) Prior Art A conventional film winding device is disclosed in Japanese Patent Publication No. 1212-1983, for example. This winding device prevents the appearance of the film roll from being significantly deteriorated due to air being drawn in between the films during winding, as well as preventing the film from being twisted in the width direction due to the air being drawn in, resulting in uneven edges. During winding, one Tatsuchi Roll is brought into contact with the outer periphery of the film being wound at the film winding position, and another Tatsuchi Roll is brought into contact with the outer periphery of the film being wound up at the film winding position. is such that one of the Tatsuchirolls is always in contact with the other. Air entrainment can be prevented by contacting the Tatsuchi Roll.

(c) Problems to be solved by the invention However, in the conventional film winding device as described above, vertical wrinkles tend to occur at the start of winding.
There is a problem in that this problem is exacerbated as the winding progresses, and the film roll may eventually become defective. That is, when a film is generally run while applying tension between rolls, the widthwise dimension of the film running in the space between the rolls becomes smaller than the widthwise dimension of the film in contact with the rolls. In other words, the film expands and contracts in the width direction when traveling between rolls. Since there is some variation in the thickness of the film in the width direction, vertical wrinkles are likely to occur when the film is expanded and contracted in the width direction as described above. If such vertical wrinkles occur at an early stage, as the film roll becomes thicker,
Wrinkles are enlarged. In conventional film winding devices, the above-mentioned problems occur because the film travels through space before being wound onto a paper tube. In addition, the conventional film winding device as mentioned above has
Another problem is that when the turret is rotated from the winding position to the take-out position, wrinkles, unevenness, etc. are likely to occur in the film. In other words, if the turret disk is rotated while the film is almost fully wound and the Tatsuchi Roll in contact is changed, the film winding speed changes and the applied tension also changes. This is because the position where the image is displayed also varies greatly. The present invention aims to solve these problems.

(d) Means for Solving the Problems The present invention provides that, at the start of winding, the film is fed into the paper tube in close contact with the outer periphery of the drum roll, and the turret is rotated immediately after the start of winding. The above problem is solved by winding most of the film at the winding position. That is, the film winding method according to the present invention sequentially moves a plurality of rotatable turrets to a winding position, a winding position, an unloading position, and an attaching position where each winding shaft is sequentially formed in the rotating direction of the turret. By intermittently turning and stopping so that the
This method deals with the method of winding continuously fed film. between the stroke roll that is pressed by this, and between the paper tube installed on the rotating take-up shaft at the winding position and the stroke roll that is pressed against it by the pressing force from the drum roll. (b) starting the rotation of the turret immediately after winding the leading end of the film around the outer periphery of the paper tube; (c) (d) When the turret turns to a predetermined position, the press roll is moved and the paper tube is moved. (e) returning the stroke roll to its initial position and releasing the pressing state of the stroke roll against the film surface on the outer periphery of the paper tube; (f) moving the above-mentioned predetermined winding shaft to the winding position; When the turret reaches this point, the rotation of the turret is stopped, and the film is placed between the paper tube installed on the next take-up shaft located at the winding position and the stroke roll that is pressed against it by the pushing force from the drum roller. (g) Winding is performed with the press roll being pressed against the film surface on the outer periphery of the paper tube at the winding position until the film on the outer periphery of the paper tube is fully wound; (g) this prescribed winding axis; During winding, taking out the already wound film roll from the take-up shaft located at the removal position, and installing a new paper tube on the take-up shaft from which the film roll was taken out, located at the installation position. , (h) When the winding on the prescribed winding shaft at the above winding position is completed, the cutter is operated to cut the film, and at the same time the cutter is placed on the next winding shaft located at the winding position. The continuously fed film is wound by winding it around the outer periphery of the paper tube, returning the press roll to its initial position, and repeating steps (i) and (b) to (h) again.

Further, the apparatus used to carry out the above method includes a turret in which a plurality of rotationally driven winding shafts are provided at equal intervals on the circumference, and a turret arranged adjacent to the turret.
A drum roll that is movable toward and away from the turret and is driven to rotate, a nip roll that is pressed against the drum roll, and a winding shaft and drum roll at the winding position on the turret at a stopped position. and a stroke roll that is swingably supported by an arm, and the winding shaft at the winding position is located adjacent to a winding position where the winding shaft stops when the turret next turns. , a press roll swingably supported by an arm, and a cutter disposed close to the winding shaft at the winding position.

(e) Effect By winding the film as described above, at the start of winding, the film travels in close contact with the outer periphery of the drum roll and stroke roll, and is immediately wound onto the paper tube. For this reason, almost no vertical wrinkles occur at the initial stage. Then, almost all of the film will be wound up at the winding position after the turret has rotated. When the turret rotates from the winding position where the leading end of the film is wound around the paper tube and winding begins to the winding position, the roll for preventing air from being drawn in is switched from a stroke roll to a press roll. Since this switching is performed immediately after the start of winding, only a small amount of film is wound onto the paper tube at this point. Therefore, the influence of the rotation of the turret on the film winding speed, tension, etc. is small, and the change in the contact position of the rolls is also small, so the effect on the film flow when switching from the stroke roll to the press roll is small. Disturbances are also reduced. Therefore, the turret can be rotated to the winding position without causing wrinkles or irregularities on the film, and the film can be fully wound in a stable state under pressure by the press roll at the winding position. Since wrinkles are not generated at the initial stage, there is almost no effect even if the film travels in space a little before the winding position.

(F) Embodiment FIG. 1 shows a film winding device in a state immediately before starting film winding. The turret 10, which can be rotated by 90 degrees, has a first winding shaft 12, a second winding shaft 14,
A third winding shaft 16 and a fourth winding shaft 18 are provided at equal intervals on the circumference. The turret 10 can be rotated by a rotating device (not shown), and the winding shaft 1
2, 14, 16, and 18 can be independently rotated by a drive device (not shown). A stroke roll 20 is provided adjacent to the first winding shaft 12 in the state shown in FIG. The stroke roll 20 is supported by an arm 22 and
It is possible to swing around 4. This stroke roll 20 is in a free rotation state (not rotationally driven by a drive device). The arm 22 is swingable by an air cylinder (not shown). A drum roll 26 is provided adjacent to the stroke roll 20. The drum roll 26 can be moved toward or away from the stroke roll 20 by, for example, an air cylinder. Furthermore, a nip roll 28 is provided adjacent to this drum roll 26. drum roll 26
is rotated by a drive device (not shown), but the nip roll 28 is in a freely rotating state.
Press roll 30 above stroke roll 20
is provided. The press roll 30 is supported by an arm 34 that can swing around a shaft 32 as a fulcrum. The press roll 30 can be rotated by a drive device (not shown), and the arm 34 can be swung by an air cylinder (not shown). The surfaces of the stroke roll 20, nip roll 28, and press roll 30 are coated with synthetic rubber, and the surface of the drum roll 26 is plated with chrome or the like. A cutter 35 for cutting the film is provided near the first winding shaft 12. The cutter 35 cuts the film 36 and at the same time cuts the paper tube 3 attached to the first winding shaft 12.
It also has the function of wrapping the leading end of the film 36 around 8. A film 36 is extruded from a T-die by an extruder (not shown), cooled and stretched, and is supplied between a nip roll 28 and a drum roll 26.

FIG. 1 shows the state at the start of the winding operation. That is, as shown in the figure, the film 36 is placed around the outer circumference of the drum roll 26 and the stroke roll 20.
The first defective portion of the film 36 is wound onto the fourth take-up shaft 18 by passing it through the outer periphery of the film 36 and passing it from the first take-up shaft 12 in the winding position to the fourth take-up shaft 18 in the winding position. Then, the film 36 is cut by the cutter 35 and the tip of the cut film 36 is wound around the paper tube 38 of the first winding shaft 12 by the cutter 35. Up to this state, both the fourth take-up shaft 18 and the first take-up shaft 12 are being driven, but after cutting by the cutter 35, the fourth take-up shaft 18 is stopped. As a result, winding of the film 36 is started by the first winding shaft 12 at the winding position.

When winding is started, the cutter 35 immediately returns to the initial position, as shown in FIG. At the same time, the turret 10 begins to rotate clockwise in FIG. Since the stroke roll 20 is pressed toward the first take-up shaft 12 by an air cylinder, it swings about the shaft 24 in accordance with the rotation of the turret 10, and the film 36 is wound around the paper tube 38.
maintains close contact with the outer periphery of the Further, the drum roller 26 is also moved to a predetermined position by the stroke roll 20.
During this time, the film 36 does not travel through the space immediately before being wound onto the paper tube 38, since the film 36 moves in the direction of the paper tube 38 and the contact state between the two is maintained.

In this way, as shown in FIG.
When it is detected by, for example, a limit switch that the press roll 3 has rotated to a predetermined position, the press roll 3
0 swings counterclockwise in FIG. 3 about a shaft 32 by an air cylinder and comes into contact with the outer periphery of the film 36 wound around the outer periphery of the paper tube 38. Almost at the same time, the pressed state of the stroke roll 20 is released, and the stroke roll 20 returns to its initial position. By doing this, the roll that presses the wound film 36 is switched from the stroke roll 20 to the press roll 30.

The turret 10 continues to rotate further and, as shown in FIG. 4, stops in a state rotated 90 degrees from the initial state shown in FIG. That is, the first winding shaft 12 is in the winding position, the second winding shaft 14 is in the winding position, the third winding shaft 16 is in the mounting position, and the fourth winding shaft 18 is in the winding position.
are respectively located at the removal position. The press roll 30 continues to be pressed toward the first winding shaft 12 by the operation of the air cylinder. In this state, the paper tube 38, which has been previously attached to the second take-up shaft 14, comes into contact with the stroke roll 20, and the film 36 flows as shown. Therefore, the film 36 flows stably,
maintained under constant tension. In this state, the film 3 is rolled up by the first winding shaft 12 until it is fully wound.
6 winding is performed. That is, most of the film 36 except for the initial stage is wound up at the winding position shown in FIG. During this winding, the paper tube 38 attached to the fourth winding shaft 18 is taken out. Also, a new roll of paper 38 is attached to the third take-up shaft 16. In this case, the defective film at the start of extrusion is wound around the paper tube 38 taken out from the fourth take-up shaft 18, but from the next time onwards, a completely wound film roll will be taken out. When the film 36 is wound to a predetermined diameter on the first winding shaft 12 (in a fully wound state), the cutter 35 is activated to cut the film 36 and at the same time transfer the tip of the cut film 36 to the second winding shaft. 14 is wound around the paper tube 38 attached to the tube 14. Immediately after this press roll 3
0 returns to the initial position. As a result, the initial state shown in FIG. 1 is restored (ignoring the difference in each sign of the winding shaft). In the same way, turret 10
The film 36 is wound by rotating it 90 degrees at a time. In Fig. 5, the turret 1 is changed from the state shown in Fig. 4.
The state after 0 has been rotated 90 degrees is shown. The film 36 is wound onto the second winding shaft 14 located at the winding position until it is fully wound. The third take-up shaft 16 in the winding position has the film 36 inserted between its outer periphery and the stroke roll 20. A new paper tube 38 is attached to the fourth take-up shaft 18 located at the attachment position, and from the first take-up shaft 12 located at the removal position,
The full film roll is taken out.

At the start of winding, as shown in Figure 1,
Since the film 36 is wound up without running in space, the width direction dimension does not change and no vertical wrinkles occur. In addition, as shown in FIG. 3, the stroke roll 20 is switched to the press roll 30 with the film 36 slightly wound up, and as shown in FIG. Since the film 36 is wound up, wrinkles and unevenness do not occur in the film 36 while the turret 10 is rotating.
The film 36 is wound while the film winding speed, tension, contact position of the press roll 30, etc. are stable, and a film roll free from air entrainment, wrinkles, and unevenness can be obtained. Further, since wrinkles are not generated at the initial stage, wrinkles are not promoted.

In this specification, the object to be wound up is a film, and the term "film" refers to a thin film-like object to be wound up by such a winding device.

(g) Effects of the Invention As explained above, according to the present invention, immediately after the start of film winding, the film that is traveling in close contact with the roll is wound up as it is, and the turret is immediately rotated to rotate the film. Since most of the film is wound up at the later winding position, it is possible to obtain a film roll that is not only free of air entrainment but also free of wrinkles and unevenness.

[Brief explanation of drawings]

Figures 1, 2, 3, 4 and 5 are views sequentially showing the operating states of the film winding device according to the present invention. 10... Turret, 12, 14, 16, 18...
... Winding shaft, 20 ... Stroke roll, 26 ...
Drum roll, 30... Press roll, 35...
Katsuta, 36...film, 38...paper tube.

Claims (1)

[Scope of Claims] 1. A rotatable turret in which a plurality of winding shafts are provided at equal intervals on the circumference, and the winding position, winding position, and removal where each winding shaft is sequentially formed in the rotating direction of the turret. In a film winding method in which continuously fed film is wound by intermittently rotating and stopping the film so that it is located at the position and mounting position in sequence, (a) The film is placed in contact with the drum roll over a predetermined circumferential length between the drum roll and the stroke roll that is pressed by the drum roll, and on the rotating take-up shaft at the winding position. (b) inserting the paper tube between a paper tube and a stroke roll that is pressed against the paper tube by a force from a drum roll, cutting the film with a cutter and simultaneously winding its tip around the outer periphery of the paper tube; (c) Start the movement of the stroke roll at the same time as the turret starts turning, and maintain the pressing state of the stroke roll against the film surface on the outer periphery of the paper tube. (d) When the turret has rotated to a predetermined position, move the press roll to press the film on the outer periphery of the paper tube; (e) Return the stroke roll to its initial position and press the film on the outer periphery of the paper tube. (f) When the predetermined winding shaft mentioned above reaches the winding position, the rotation of the turret is stopped, and the turret is installed on the next winding shaft that is positioned at the winding position. A film is inserted between the rolled paper tube and a stroke roll that is pressed against it by a pressing force from a drum roller, and the press roll is pressed against the film surface on the outer periphery of the paper tube at the winding position. Winding is performed until the film on the outer periphery of the tube is fully wound; (g) During winding on this predetermined winding shaft, the already wound film roll is taken out from the winding shaft located at the unloading position; and installing a new paper tube on the take-up shaft from which the film roll was taken out, which is located at the mounting position; (i) Then, (b) again (b) A film winding method characterized by repeating steps ) to (h). 2. A turret in which a plurality of rotationally driven winding shafts are provided at equal intervals on the circumference, and a drum that is arranged adjacent to the turret and is movable in directions toward and away from the turret and is rotationally driven. A stroke that is arranged between the roll, the nip roll that is pressed against the drum roll, and the drum roll and the winding shaft at the winding position on the turret at the stop position, and is swingably supported by an arm. The roll and the winding shaft at the winding position are arranged adjacent to the winding position where the winding shaft is stopped by the next rotation of the turret,
A film winding device comprising: a press roll swingably supported by an arm; and a cutter disposed close to a winding shaft at the winding position.