JPS6128573B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic web winder that continuously winds a web such as paper or plastic film, and more specifically, an automatic web winder that continuously winds a web such as paper or plastic film. The present invention relates to an automatic web winder that automatically switches the winding core.

Various types of automatic web winding machines have been proposed in the past. However, in both devices, when the web begins to be wound on the core, the leading edge of the web sometimes folds over itself, causing wrinkles and plastic deformation in the web, which are then adhered to the core, resulting in a decrease in the quality of the entire web and a reduction in production yield. This has become a problem due to a decrease in Particularly in the case of winding a photographic film whose web surface is coated with a light-sensitive emulsion layer, the above-mentioned plastic deformation can also cause film failure called pressure fog. Furthermore, when winding expensive photographic film, the loss at the initial stage of winding can be costly, so when changing the winding core, web running is temporarily stopped and the web is cut, while one end of the web on the unwinding side is The work of winding the paper onto a new core is done manually. However, in this work, since the web is wound around the rotating new core, there is a risk of hands getting caught between the new core and the web, and there are also problems such as the need for a large number of people to change the core. There is also.

Furthermore, the conventional apparatus has a problem in that the structure is complicated and expensive considering the work of cutting the web and winding it around a new core.

The present invention has been made in view of these circumstances, and its first purpose is to automate the core switching operation for continuous winding of long webs, and its second purpose is to unmanned the core switching operation for continuous winding of long webs. The third objective is to provide an automatic web winding machine that can be used for a wide range of applications, that is, an automatic web winding machine that does not cause wrinkles or plastic deformation due to folding of the leading edge of the web. An object of the present invention is to provide a reliable automatic web winding machine.

The basic configuration of the automatic web winding device of the present invention that achieves this object is: a cutting mechanism that cuts the web when it is wound around a fully wound core in the web winding process;
a pull-back means for pulling back the web on the feeding side after cutting the web in a direction opposite to the feeding direction; and a tape pasting roll for pasting the adhesive tape onto a new winding core.

The automatic web winding device of the present invention has the following steps in order to efficiently and reliably wind the web supplied from the manufacturing equipment side onto the core in the process of automatically winding up the continuously supplied web. When the winding on the core is sufficiently filled and the core is fully wound, a cutting mechanism with a cutting blade is brought close to the web while moving the fully wound core, and the supplied web is cut under tension. Bring the rear web close to the new core, bring the tape application roll close to the web, clamp the web between the tape application roll and the new core, return the cut part of the web to the supply side, and place the tape application roll on the tape application roll. Adhesive tape is adhered to the cut end of the web, and as the web moves, the remaining portion of the adhesive tape is used to adhere to the new core, thereby fixing the web to the new core. This allows the web to be wound onto a new core. In such a configuration, since the adhesive tape is applied in conjunction with the cutting of the web, it is advantageous that the web cutting mechanism and the adhesive tape applying mechanism are integrated. Further, the adhesive tape is supplied by holding it in advance on a taper application roll. That is, as the tape application roll rotates, the adhesive tape is placed at a position on the roll that presses against the cut portion of the web. This allows for efficient work.

The present invention having the above-mentioned configuration will be described with reference to one embodiment shown in the drawings.

1 to 3 are configuration diagrams showing one embodiment of an automatic web winding machine according to the present invention, in which FIG. 1 is a state diagram during winding, and FIG. 2 is a state diagram in which the web is on standby for cutting the web. FIG. 3 is a diagram showing the state when cutting the web. In these figures, 1 is a turret winder, 2 is a pivot axis of the turret winder 1, and 3 is a pivot arm attached to the center shaft 2. A suction board 4 is attached to the center (central axis 2) of this swing arm 3. A lower cutting blade 5 is attached to the suction board 4, and inside thereof there are four chambers 4a, 4b, 4c, 4d.
It is divided into Further, the suction board 4 is formed with a groove 4e into which an upper cutting blade 18, which will be described later, is inserted. 6 and 7 are winding cores attached to the turret winding machine 1 (swivel arm 3); here, the winding core 6 is
The figure shows a case where the web 8 is being wound up, and the case where the web 8 is not wound is shown as the winding core 7. 9-1
1 is a guide roll that leads the web 8 to the turret winder 1 side; 12 is a nip roll that cooperates with the guide roll 9 to stop the web 8 from running; 13
Reference numeral 14 denotes a fixed-length return roll for pulling back the web 8 by a certain amount in a direction opposite to the feeding direction, and 14 a drive unit for moving the fixed-length return roll 13 in the direction A in the figure. This drive unit 14 is composed of, for example, an air cylinder, and together with the return roll 13 constitutes a pull-back device. A swing arm 15 is rotatably supported on a shaft 16. A guide roll 17 and an upper cutting blade 18 are attached to the vicinity of the tip of the swig arm 15, and a tape application roll 19 is rotatably attached to the center. This cutting upper blade 18
The web 8 is also moved in the width direction by a drive unit 20 such as an air cylinder fixed to the swing arm 15. This cutting mechanism can be of any kind and therefore:
When cutting the web 8, any general rigid cutter, heating wire, high frequency cutter, etc. can be used. However, in the cutting mechanism configured as in this embodiment, it is preferable to use a commercially available circular blade as the upper cutting blade 18 in order to reliably and cleanly cut the web 8 regardless of its type. A tape holding surface 19a for holding the single-sided adhesive tape 21 with the adhesive side facing outward is formed on the surface of the tape application roll 19,
A large number of suction holes 19b are bored there.
Then, by suctioning the inside of the tape application roll 19 to negative pressure with a suction device (not shown) such as a blower, the single-sided adhesive tape 2 is applied to the tape holding surface 19a.
1 adsorption is possible. Reference numeral 22 denotes a tape supply device for supplying the above-mentioned single-sided adhesive tape 21, which feeds out the single-sided adhesive tape with interleaving paper and removes the interleaving paper with a separator, and the device itself runs in the width direction of the web 8 to feed the web. A single-sided adhesive tape 21 having a width slightly longer than 8 is supplied. 2
Reference numeral 3 designates a position detection dog provided at one end of the tape application roll 19 so as not to hinder the rotation of the tape application roll 19, and 24 represents a limit switch attached to the swing arm 15. The position detection dog 23 is connected to the holding surface 19 of the tape application roll 19.
a comes into contact with the limit switch 24 at a position facing the tape supply device 22. A pressure roll 25 is driven by a motor 26 and is pressed against the tape application roll 19 when the swing arm 15 is in the horizontal position (FIG. 1). 27 is swing arm 15
This is an electromagnetic brake attached to the tape application roll 19, which is connected to the shaft of the tape application roll 19 to stop its rotation.

Here, the positional relationship between the tape holding surface 19a (tape supply device 22) of the tape application roll 19 whose rotation is stopped by the electromagnetic brake 27 and the nip point at the time of cutting will be explained using FIG. FIG. 4 is a detailed explanatory diagram of the positional relationship in the cutting state (FIG. 3). In the figure, S is tape holding surface 1
At the point on 9a, attach the single-sided adhesive tape 21 of width W.
This point is divided into ₁ and ₂ . N is the point where the tape application roll 19 is joined to the new core 7 via the web 8, that is, the nip point. In this embodiment, the length of the arc NS on the circumferential surface of the tape application roll 19 from the nip point N to the internal division point S is the straight line distance from the nip point N to the upper cutting blade 18 (i.e., from the nip point N to the upper cutting blade 18). The length (to the cut end of the web) is selected to be equal to L. In other words, R·Θ=L where R is the radius of the tape application roll 19 and Θ is the central angle [rad] between the circular arcs NS.

The operation of the apparatus of the present invention configured as above will be explained. When the web 8 is being wound, the swing arm 15 is in a horizontal position (FIG. 1), and preparations for the next core changeover are being performed. At this position, the tape application roll 19 is in contact with the pressure roll 25, and when the motor 26 is started and the pressure roll 25 is rotated, the tape application roll 19 pressed against the pressure roll 25 also rotates. When the tape application roll 19 rotates to a position where the tape holding surface 19a faces the tape supply device 22, the position detection dog 23 activates the limit switch 24.
This contact signal causes the motor 26 to stop, and the electromagnetic brake 27 fixes the tape application roll 19 at that position. Next, the inside of the tape application roll 19 is suctioned to negative pressure, and the single-sided adhesive tape 21, which has been fed by the tape supply device 22 to a length slightly longer than the web width, is held with the adhesive side facing outward. This completes the preparation operation.

Before the winding of the winding core 6 is completed, the swing arm 3 of the turret winder 1 rotates to the switching position as shown in FIG. Waiting for core change. When the winding length of the winding core 6 reaches a predetermined length,
The nip roll 12 is closed, and the web 8 downstream of the nip roll 12 stops running. Next, the swing arm 15 further descends, the tape application roll 19 comes into contact with the new core 7, and the upper cutting blade 18 enters the groove 4e and meshes with the lower cutting blade 5. This mesh is web 8
is carried out outside the In addition, from the state shown in Fig. 2 to the third
While the swing arm 15 shifts to the state shown in the figure, the web 8 is pushed by the guide roll 17, and the path length of the web 8 from the guide roll 11 to the fully wound core changes sequentially, so that the fully wound core 6 side It is necessary to release the winding drive and free the rotation. When the swing arm 15 is lowered, the web 8 wound around the fully wound core 6 is returned by the amount of change in path length by the rotatable guide roll 17, so that no damage occurs to the web 8. When the swing arm 15 has completely lowered, the chambers 4a and 4b are sucked under negative pressure, and the web 8 is held firmly on the suction board 4 without being damaged.

Next, the upper cutting blade 18 moves in the width direction of the web 8 to cut the web 8. After the cutting is completed, the inside of the chamber 4a is opened to the atmosphere, the web 8 on the feeding side is separated from the suction board 4, the electromagnetic brake 27 is deenergized, and the return roll 13 is moved by the drive device 14 in the direction indicated by the arrow A in FIG. move in the direction. The tape application roll 19 and the new core 7 uniformly apply a nipping force over the entire width of the web 8 to prevent it from slipping.
The web 8 is pulled upward by a length corresponding to the amount of movement of the regular return roll 13, and the tape application roll 19 is also rotated by an angle corresponding to the amount of movement of the web 8. Therefore, as shown in FIG. 5a, when the regular return roll 19 moves by (L- ₁ )/2, the web 8 is pulled up by L- ₁ and one end of the single-sided adhesive tape 21 comes into contact with the web 8. death,
When the roll 19 moves further by L/2 as shown in FIG. 5b, the cut end 8a of the web 8
reaches the nip point N, and only _one of the tape widths W of the single-sided adhesive tape 21 is attached to the web 8.
When the regular length return roll 19 further moves to (L+ ₂ )/ ₂ as shown in FIG. In this way, the single-sided adhesive tape 21 on the tape holding surface 19a of the tape application roll 19 adheres _one of the tape widths to the web 8 and the remaining _two to the new core 7 side, thereby securing the tip of the web 8. It can be reliably locked onto the new winding core 7.

When the end of the web 8 has been locked, the nip roll 12 is released, the swing arm 15 is raised, the new winding core 7 is connected to a winding drive device (not shown) and driven, and the web 8 is wound up. Begins.
On the other hand, the regular length return roll 13 returns to its original position at a speed that does not cause tension fluctuations during winding of the new winding core 7. When the above switching operation at the beginning of winding is completed,
The swing arm 3 of the turret winder 1 is rotated 90 degrees counterclockwise to the normal winding position (corresponding to FIG. 1), and the winding operation is continued. In this state,
The operator stops the suction device that creates negative pressure in the chamber 4b and removes the cut end 8b of the web 8 of the fully wound core 6.
are fixed with tape or the like to form a wound product of a fully wound core 6. During this work, the web 8 is wound around the winding core 7.
Preparatory operations for the next core replacement are also in progress.
Then, when the required amount of web 8 is wound around the winding core 7,
The operations described above, such as cutting the web 8 and attaching the web 8 to the winding core, are repeated. In the case of this embodiment, the rear end of the web 8 is held by the suction board 4 until the work moves on to tape the rear end of the web 8 on the side of the fully wound core 6, so that the rear end of the web 8 falls. It does not pick up dust and does not cause damage or film failures such as static.

In the above embodiment, the pull-back means is configured to pull back the cut web 8 upward using the fixed-length return roll 13. , the web 8 may be pulled back in the opposite direction to the feeding direction, or a motor with a brake may be used to rotate this roll instead of the electromagnetic brake 27 of the tape application roll 19, or other web pulling device may be used. It may be configured. Furthermore, in the above embodiment, the web 8 is uniformly nipped between the new core 7 and the tape application roll 19 so as not to slip, and the arc length from the nip point N to the cut end after cutting is equal to the length L of the web. Apply single-sided adhesive tape 2 to point S on the tape application roll 19 corresponding to
1 in advance and pulling back the web 8 on the unwinding side in the opposite direction to the unwinding direction so as not to slip against the tape application roll 19, a part of the tape width is attached to the web 8 and the rest is attached to a new roll. Although the tape is attached to the core 7, it is not necessary to always nip the web 8 with the tape application roll 19 when pulling the web 8 back. It is also possible to detect by some method that the cut end 8a of the web 8 approaches the new core 7, nip only the cut portion (the cut end and its vicinity), and apply the adhesive tape 21 there. good. or,
As a cutting mechanism, a configuration is shown in which a linear blade is used as the lower cutting blade 5 and a movable circular blade is used as the upper cutting blade 18, but the double blades 5 and 18 may be replaced, The double-edged blades 5 and 18 may be both linear.

As explained above, in the present invention, the web 8 on the feeding side after being cut is pulled back in the opposite direction to the feeding direction, and at least the cut portion of the web 8 is nipped between the tape application roll and the new core during pulling back. Since the cut portion is attached to the new core with adhesive tape, the leading edge of the web does not fold over, wrinkle, or undergo plastic deformation. Moreover, the core switching work can be automated. Furthermore, the structure of the winder is simple, which not only reduces the cost of the entire device but also improves its reliability.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the state of an automatic web winder according to an embodiment of the present invention during winding, FIG. 2 is a block diagram showing the state in standby for cutting the web, and FIG. It is a block diagram at the time of cutting. Furthermore, Fig. 4 is an explanatory diagram showing the relationship between the web length L from the nip point to the cut end and the holding position of the adhesive tape on the tape application roll, and Fig. 5 shows the relationship between the web length L from the nip point to the cut end and the holding position of the adhesive tape on the tape application roll. FIG. 1...Turret winding machine, 2...Turning center shaft,
3...Swivel arm, 4...Suction board, 5
... lower cutting blade, 6 ... winding core (full winding core), 7 ... winding core (new winding core), 8 ... web, 12 ... nip roll, 13 ... regular length return roll, 14 ... drive Apparatus, 15... Swing arm, 17... Guide roll, 18... Upper cutting blade, 19... Tape pasting roll, 21... Adhesive tape, 22... Tape supply device.

Claims (1)

[Claims] 1. A cutting mechanism that cuts the web when it is fully wound onto a core in the web winding process, a pull-back mechanism that pulls back the web on the unwinding side in the opposite direction to the unwinding direction after cutting the web, and a mechanism that holds and pulls back the adhesive tape. an automatic web winding device comprising: a tape sticking roll that rotates and presses the cut portion of the web on the feeding side to a new core in accordance with the above, and sticks the cut portion to the new core with the adhesive tape; Machine.