JPH0585463B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for winding a long printed matter (film, paper, etc.) printed by a rotary printing press by a predetermined length when it is wound up by a rewinder device. This relates to a method for rewinding (splicing) a new core metal.

[Conventional technology]

As shown in FIG. 6, a conventional splicing device is composed of a splice arm 8 and a tutti roll arm 9, which are arranged between an outfeed device 1 and a take-up device 2.

The printed film 3 is sent to the winding device 2 by an outfeed roll 4 and wound around one shaft of a spider arm 5. Winding film 6
When the wire is wound to a predetermined winding length, splicing (rewinding) is performed on the new core 7 (core metal) while maintaining the line speed. For splicing, when a preparation button (not shown) is pressed, the splice arm 8 is lowered and the Tatsuchiroll arm 9 is raised, so that the film 3 is wound around the Nucore 7 as shown in FIG. When a splice preparation button (not shown) is pressed, pre-driving of the NuCore 7 is started, and the outer circumferential speed of the NuCore 7 is controlled to be the same speed as the line speed. A splice roll 10 presses the film 3 at the lower end of the splice arm 8, and a tatsu roll 11 presses the film 3 at the upper end of the tatsu roll arm 9. When an automatic button (not shown) is pressed in the above state, the cutter air cylinder 12 is operated and the cutter 13 cuts the film 3. The tip of the cut film 3 is
It is sandwiched between the Nucore 7 and the Tatsuchiroll 11 and wound around the Nucore. Thereafter, the splice arm 8 is raised and the Tatsuchiroll arm 9 is lowered to complete the splice.

[Problem that the invention seeks to solve]

If the conventional splicing method is used, there is a limit to the cutter speed (air cylinder speed), and if the cutter speed is slower than the film speed, the cutting quality will deteriorate. Furthermore, since the cutter teeth have a serrated shape, the cut surface of the film becomes serrated and easily folds. Since there is a distance between the tip of the cut film and the NuCore and Tatsuchiroll, the tip of the film may be folded or misaligned. If the film is wound up with a fold or misalignment at the leading end of the film, wrinkles will occur at the winding core, and these wrinkles will be propagated to the outer periphery of the winding, increasing the number of defective films. In addition, tension fluctuations occur when the film is cut by a cutter and when switching from the old core to the new core, resulting in deformation of the film.

It is an object of the present invention to provide an automatic splicing method that prevents the occurrence of wrinkles and deformation of the film, which are the drawbacks of the prior art, and can reliably rewind the film without stopping the rotary press. That is.

[Means for solving problems]

The method of the present invention, created to achieve the above object, stops the film from running between the outfeed device and the take-up device, winds the film around the new core using a pair of pressure rolls, and Cut the film between the wound film and the new core, and while applying water to the new core, cut the film until the tip of the cut film reaches between the new core and the pressure roller on the winding film side. , the NuCore is rotated in the opposite direction to the winding direction, and after the leading edge of the film reaches between the NuCore and the presser roller, the NuCore is rotated at low speed in the winding direction to absorb the slack in the film due to the above-mentioned reverse rotation. After that, the film is wound by accelerating the rotation of the nucore.

[Operation] When the feeding of the printed matter to the splicing device is temporarily stopped, the printed matter can be cut in a straight line (specifically, perpendicular to the feeding direction), and the new core can be wound up when being wound around the core bar. By reversing the direction to the opposite direction and wrapping the tip of the cut film around the new core, the cut end can be reliably wrapped around the core bar without folding.

〔Example〕

FIG. 2 shows the overall configuration of a splicing device configured to carry out the splicing method according to the present invention, in which a feed device 14, an accumulation roll device 15, and a dancer roll device 16 are provided on the inlet side of the outfeed device 1. be. Feed device 14
is composed of a feed roll 17, a feed roll motor 18, and a timing belt 19 connecting these.The rotation of the feed roll motor 18 is controlled by a line speed signal plus a signal from a tension detector 20. There is. The accumulation roll device 15 includes an accumulation roll 21, a chain 22 suspending the accumulation roll 21, and an air cylinder 23 at the tip thereof, and always applies a tensile force to the extent that the accumulation roll 21 absorbs its own weight.
Also, an intermediate sprocket 24 is installed in the middle of the chain 22.
It is connected by an accumulator motor 25 and a timing belt 26. Intermediate sprocket shaft 2
An electromagnetic brake 28 is provided at the tip of the wheel 7, and the brake is ON during regular operation.

In the dancer roll device 16, a dancer roll 30 is attached to the tip of a dancer roll lever 29, and the dancer roll lever 29 swings in a pendulum shape around a dancer roll support shaft 31, and a lever 32 is attached to the end of the dancer roll support shaft 31. An air cylinder 33 is connected. The air cylinder 33 is configured to output an output according to the tension setting and apply tension to the film 3.

The outfeed device 1 is composed of an outfeed roll 34, an outfeed roll motor 35, and a timing belt 36 connecting these.
Rotation control is performed by a line speed signal plus a signal from a synchro transmitter 37 provided on the end face of the dancer roll support shaft 31.

With the above configuration, the film 3 runs at the printing speed,
It is wound around one shaft of the spider arm 5 of the rewinder device. When the take-up film 6 (FIG. 2) has been wound up to a predetermined length, the printing speed is maintained as it is, and splicing is performed on the new core 7. Splices in this example are performed in the following order.

When the preparation button is pressed, the water base roll motor 38 rotates as shown in FIG. 1, and the water base roll 40 connected by a timing belt 39 rotates. By the rotation of the water base roll 40, water 42 contained in the water boat is pumped up and the water 42 is transferred to the Molton roll 43 in contact with the water base roll 40. When the water transfer is completed, the water base roll 40 is stopped.

Electromagnetic brake 28 of the accumulation roll device 15
brake is turned off. At the same time, the new core 7 is predriven by the winding motor 44.

The spider arm 5 rotates forward and stops at a horizontal position. Next, the splice arm 8 is lowered, the Tatsuchiroll arm 9 is raised, and the film 3 is wound around the new core 7.

FIG. 3 is a control chart showing the state of the accumulation roll 21, the printing material (film) feeding speed, and the tension control state of the printed material in various operating states of the apparatus shown in FIG.

In the above-mentioned state (normal operation), the accumulation roll 21 of the accumulation roll device 15 is in the printing position and the operating speed is maintained at the printing speed.
(That is, the film is fed into the winding device at a speed equal to the speed at which the film is fed out from the rotary press.) At this time, the tension of the printed matter (film) is controlled by controlling the rotation of the feed roll 17 using a line speed signal plus a tension signal, and the accumulation roll motor 25 is stopped (servo locked state).
The rotation of the outfeed roll 34 is controlled by a line speed signal plus a signal from a synchro transmitter 37. Next, when an automatic button (not shown) is pressed, the take-up film 6 of the take-up device 2 is brought into deceleration and stop operation as shown in FIG. At this time, the feed roll 17 maintains the printing speed, but the outfeed roll motor 35 decelerates and stops. The rotation of the outfeed roll 34 connected thereto is similarly decelerated and stopped, thereby stopping the feeding of the film 3 to the winding device 2. At the same time as pressing an automatic button (not shown), the signal from the synchro transmitter 37 is switched to the input to the accumulation roll motor 25. The film 3 fed from the feed roll 17 is transferred to an accumulation roll 21 and a dancer roll 3.
0 and travels toward the outfeed roll 34, but when the outfeed roll 34 begins to decelerate, the dancer roll 30 moves away from the neutral point and begins to move in a direction in which the film path becomes wider. This movement of the dancer roll 30 is detected by the synchro transmitter 37 and fed back to the accumulation roll motor 25, which controls the accumulation roll motor 25 so that the accumulation roll 21 begins to rise and the dancer roll 30 always returns to the neutral point. Control. As a result, the film 3 fed from the feed roll 17 is stored in the accumulation roll device 15. The outfeed roll 34 stops, and the No. 1 presser roll 44' and No. 2 presser roll 45 in FIG. 1 are driven by their respective air cylinders 46 in response to the zero speed signal.
Press film 3 onto Nucore 7. At the same time, the Molton roller 43 is pressed against the New Core 7.

Next, the film 3 is sucked by the suction cup 47, and the cutter 48 is driven by the rodless cylinder 49 in a direction perpendicular to the plane of the figure, cutting the film 3 at right angles to its longitudinal direction (feeding direction). . When the cutting operation is completed, a limit switch provided on the rodless cylinder 49 issues a signal to release the vacuum suction of the suction cup 47. Then (see FIG. 4), the Nucore 7 is reversed in the opposite direction to the film winding direction. The amount of reversal in this case is measured by a pulse tachometer generator 50 connected to the New Core 7 by a belt 51, and is reversed by a preset number of pulses. The number of pulses is set so that the leading edge of the cut film 3 returns to the point of contact between the New Core 7 and the No. 1 presser roll 44'. As a result of the above-mentioned reversal operation, water is applied to the New Core (core metal) 7 by the Molton roll 43 as shown in FIG. . In response to the reverse rotation stop signal, the No. 1 presser roll 44' and the Morton roll 45 are separated from the New Core 7, and the splice arm 8 is raised.

The old winding shaft (winding film 6 shown in FIG. 2) rotates normally to wind up the cut film. Next, the New Core 7 rotates forward at low speed and rotates the film 3 from 2 to 3.
After winding 3 times, gradually increase the speed to increase the printing speed
Speed up to 10%. Similarly, outfeed roll 3
4 also accelerates. The accumulation roll 21 continues to rise during deceleration and stop operation, during splicing, and during speed-up operation (see FIG. 3).

The accumulation roll 21 begins to descend from the point at which the outfeed roll 34 becomes higher than the operating speed (the speed at which printed matter is sent out from the rotary press).

Simultaneously with the start of speed increase, the cutter 48 returns to its original position, the No. 2 presser roll 45 is released, and the touch roll arm 9 is lowered.

When the accumulation roll 21 is lowered to the printing position, this is detected by a limit switch (not shown).

In response to the above detection signal, the signal from the synchro oscillator 37 is switched from the feedback of the accumulation roll motor 25 to the feedback of the outfeed roll motor 35, thereby controlling the tension. At the same time, the speeds of the feed roll 34 and the new core 7 are reduced to the same speed as the feed roll 17.

In this embodiment, since splicing can be performed by stopping the film 3, the film has good sharpness and can be cut in a straight line, and by attaching the tip of the cut film to the new core, folding during winding can be avoided. This completely eliminates any wrinkles caused during splicing, thereby eliminating the occurrence of poorly wrapped films. Moreover, by eliminating sudden tension fluctuations, deformation of the film can be prevented and the incidence of defective films can be reduced.

〔Effect of the invention〕

As described in detail above, according to the method of the present invention, occurrence of wrinkles and deformation of printed matter can be prevented, and rewind splices can be reliably performed without stopping the rotary press.

[Brief explanation of the drawing]

FIG. 1 is a front view of essential parts of an example of a splicing device configured to carry out the splicing method of the present invention, FIG. 2 is an overall front view of the same, FIG. 3 is a chart showing the operating state, and FIG. 4 and FIG. 5 are explanatory diagrams of the operating process. FIGS. 6 and 7 are explanatory diagrams of a conventional splicing device. 14...Feed roll device, 15...Accumulation roll device, 16...Dancer roll device, 4
0... Mizumoto roll, 41... Mizifune, 42... Water,
43... Molton roll, 47... Adsorption plate, 48
...Katsuta, 49...Rotsu dress cylinder, 50
...Pulse tacho generator.

Claims (1)

[Claims] 1. Stopping the film from running between the outfeed device and the winding device, and winding the film around the New Core by a pair of pressure rolls, so that the already wound film and the New Core are separated. While applying water to the NuCore, rotate the NuCore in the opposite direction to the winding direction until the tip of the cut film reaches between the NuCore and the pressure roller on the winding film side. After the leading edge of the film reaches between the NuCore and the pressing roller, the NuCore is rotated at low speed in the winding direction to absorb the slack in the film due to the reverse rotation, and then the rotation of the NuCore is accelerated. 1. A splicing method in a rewinder device of a rotary printing press, characterized in that the film is wound up in a rewinder device of a rotary printing press.