JPS63212655A - Rewinding method for thin beltlike body and device therefor - Google Patents

Abstract

PURPOSE:To attract a thin beltlike body to be rewound out of an old core as well as to aim at to prevent it from being wound on a new core, by installing a suction nozzle for attracting the thin beltlike body in and around the thin beltlike body at the more upstream side than a cutting part. CONSTITUTION:When a thin beltlike body F on an old core 1 runs short, a turret arm 3 is rotated, and a new core 1' is positioned right. At this time, the thin beltlike body F on the old core is wound of its residual quantity as in the past via a guide roller 4. And, a new thin beltlike body on the new core 1' and the old thin beltlike body F are pressed for adhering by a presser roller 23, while the old thin beltlike body F is cut off by a cutter 34. After cutting, the old thin beltlike body F further tries to advance forward by dint of inertia. Therefore, simultaneously with the cutting, the old thin beltlike body is attracted by the suction nozzle installed in close vicinity to the guide roller 4, thus its onward movement is stopped. With this constitution, the old thin belt is prevented from being wound on the new core 1, thus a failure of winding succession is eliminable.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method and apparatus for unwinding a ribbon.

Specifically, when unwinding thin strips such as cassette tapes, video tapes, photographic films, plastic films, etc. with a thickness of about 3μ to 20μ for coating, drying, etc., unwinding is performed from the old core. Relating to a method and device for unwinding a thin ribbon that makes it possible to continue unwinding by splicing the thin ribbon downstream from the cut point of the thin ribbon to the thin ribbon wound around a new core. , the unwinding speed of the thin strip is 350 to 70
The present invention relates to a device effective for unwinding a ribbon at a rate of 0 m/min.

[Conventional technology]

The prior art includes a turret arm that rotatably supports at least two old and new winding cores, a support that rotatably supports the turret arm, a cutting device that cuts a thin ribbon unwound from an open winding core, and an open winding core. A roller is used to press the thin strip unwound from the old core onto the new core, and the roller is used to press the thin strip unwound from the old core onto the new core. 2. Description of the Related Art A method and apparatus for unwinding a thin ribbon body are known, in which the thin ribbon body is spliced onto a ribbon body and unwinding is continued.

[Problem that the invention seeks to solve]

However, in this method, there was no control over the running of the ribbon when it was unwound from the open core. There was a problem in that the upstream side of the cut portion was wrapped around the new winding core and the splicing failed. In particular, the unwinding speed of the thin strip is 300+
When the unwinding speed was less than 1 inch w/ff, the amount of winding into the new core was small, but when the unwinding speed was 350II/1llin or more, the winding became significant. [Means for solving the problem] Therefore, the present invention When cutting the thin strip unwound from the open core, the thin strip unwound from the old core is sucked, and a suction nozzle for sucking the thin strip is placed upstream of the cutting part of the thin ribbon. The above-mentioned problem has been solved by providing it near the side thin strip body.

[Effect]

After the ribbon unwound from the open core is cut, the ribbon upstream of the cut portion of the ribbon is sucked and travels.Examples The present invention will now be described based on the illustrated examples.

In Figures 2 and 3, a ribbon F is unwound from the old winding core 1 rotating in the direction of arrow P and is running in the Q direction.
is wound around a guide roll 2 and a dancer roll (not shown) rotatably supported by a frame (not shown),
Transported to various processing steps. Pair of turret arms 3
At both ends of 13', an open core 1 and a new core 1' fully wound with a new ribbon are rotatably supported. The open core 1 and the new core 1' are rotated by known means (not shown). A pair of turret arms 3.
3', two guide rollers 4,
4' is rotatably supported. 1LJ6 of support body 5
The center of a pair of turret arms 3.3' is rotatably supported. The pair of turret arms 3, 3' are adapted to be rotated in the direction of arrow R by known means (not shown). A bracket 8 is fixed to the fixed body 7, and a frame 10 is rotatably supported by a pin 9 of the bracket 8. A pair of first arms 11 and 11' and a bracket 12 are fixed to the frame 10. A guide roll 13 is rotatably supported at the center of the pair of first arms 11, 11', and a cutler roller 14 is rotatably supported at the tip thereof. A control motor 15 (servo motor, stamping motor, etc., which can be controlled to position and stop at any angle position during one rotation) is attached to the tip of one first arm 11, and the rear end A pin 16 is fixed to the portion (t! near the center of motion).

The pin 17 is fixed to a pair of first arms 11.11'. One end of the air cinder 18 is rotatably attached to a pin 19 provided on the bracket 8, and the tip (other end) of the piston 20 is screwed into a metal fitting 21 rotatably attached to the pin 16. There is. The pair of second arms 22 and 22' are rotatably supported by the pin 17, have a guide roll 23 rotatably supported at one end thereof, and have a pin 24 fixed to the other end. One end of the air cylinder 25 is rotatably attached to a pin 26 provided on the bracket 12, and the tip (other end) of the piston 27 is screwed into a metal fitting 28 rotatably attached to the pin 24. ing. Boo U-29 is attached to the shaft of control motor 15. pulley 30
is attached to the shaft 31 of the cutter roller 14. A belt 32 is passed around the pulleys 29 and 30.

The blade support 33 is fixed to the blade roller 14 and has a blade 34 attached thereto. A suction nozzle 35 is disposed above the guide roller 4', that is, in the vicinity of the ribbon on the upstream side of the cutting section of the ribbon, which will be described later. and the thin ribbon body are suctioned. The suction is effected by controlling known vacuum means and valves (not shown).

Control motor 15, pulley 29.30. The belt 32, blade roller 14, blade support 33, and blade 34 collectively constitute a cutting device 50. FIG. 4 is a control block diagram when an AC servo motor is used as the control motor, and the CPU 100 of the microcomputer rotates the CPU 100 to a predetermined rotation angle position.

Stop data is sent to pulse generator 101.

The signal is sent to the A converter 102. Next, the analog signal is sent from the D/A converter 102 to the servo amplifier 103. Next, the power signal amplified by the servo amplifier 103 is transmitted to the control motor 1.
5, and the control motor 15 and cutter 34 are rotated.

The rotation angle position of the control motor 15 is detected by a PB15' (pulse generator) built into the control motor 15.

A pulse signal is sent from the PG 15' to the D/A converter 102, and the data pulse signal and the pulse signal are compared within the D/A converter 102. That comparison is amazing! continued, D
When the counter in the /A converter 102 reaches zero, the control motor 15 stops.

In the present invention having the above configuration, when the ribbon F of the old winding core 1 is close to empty winding, the ribbon F unwound from the old winding core 1 is cut, and the ribbon F unwound from the old winding core 1 is cut, and In order to continue unwinding by splicing the thin strip on the side to the thin strip wound on the new core 1', the following operation is performed.

First, the pair of talent arms 3, 3' are rotated in the direction of the arrow R to swap the positions of the old and new cores, and then the air cylinder 18 is actuated, and the pair of first arms 11.1
Rotate 1'.

Therefore, as shown in FIG. 1, the thin strip F continues to run in a state in which it is in contact with the guide roller 4, the knife roller 14, the guide roller 23, the guide roller 13, and the guide roller 2.

Next, the air above the thin strip F in contact with the guide roller 4 is sucked through the suction nozzle 35. Next, the control motor 15 is rotated, and the air cinder 25 is activated to press the guide roll 23 onto the new roll 1' via the ribbon F. The blade 34 is rotated from the standby position by the rotation of the control motor 15, and after cutting the thin strip F, the blade 34 is moved to the S position.
The rotation of the control motor 15 is stopped so that it stops at the arrow position (double-dashed line position).

The purpose of stopping the blade 34 at the S arrow position is to prevent the ribbon F from being cut twice. Guide roller 4 and cutter roller 1
When the thin strip that is being passed over the 4-way cutter is cut, a certain length of waste strip is produced by the first cut and the second cut. Since this waste band must be handled manually, it cannot be handled unmanned.

Note that it is preferable that the circumferential speed of the cutting edge of the cutting tool 34 be approximately the same as or higher than the traveling speed of the thin strip.

Here, conventionally, the thin strip on the upstream side of the cutting part of the thin strip F, that is, the thin strip hanging on the guide roll 4, tries to be wound onto a new winding core due to inertia. In the present invention, since the ribbon is suctioned during cutting, inertial running is prevented and the ribbon is not wound onto the new core. The thin ribbon body F is the end of the thin ribbon body downstream from the cutting part, that is,
The end of the thin strip hanging on the push roll 23 is fixed to the adhesive part provided at the starting end of the new thin strip wound around the new core at the push roll 4 position, and is spliced and wound. The supply will continue.

Next, when the splicing and unwinding is completed, the air cylinder 18
and the air cylinder 25, the pair of first arms 1
1.11' and the pair of second arms 22.22' return to the standby position, and the blade 34 also returns to the standby position by restarting the control morph 15. (See FIG. 2) Next, the old winding core is replaced with a new winding core manually or by a robot and the system stands by, and the suction of air from the suction nozzle is stopped. If the suction from the suction nozzle is not to be stopped, the suction nozzle may be separated from the guide roller 4. In this case, when cutting the ribbon, the suction nozzle is brought closer again.

The above is one cycle of Sm unwinding of the thin strip.

〔Effect of the invention〕

In the present invention, the thin ribbon body wound from the old winding core is cut 4. The thin ribbon body is sucked so that it cannot travel, so that the thin ribbon body is wound onto the new winding core and spliced. There is no such thing as a failure.

[Brief explanation of drawings]

FIG. 1 is a control block diagram of the method for unwinding a thin ribbon body and the out-of-bag motor of the present invention. l ......Old core 1'...New core F...Thin strip 3.3'... A pair of turret arms 5...
・・・・・・Support

Claims (2)

[Claims] (1) Cut the ribbon unwound from the old core, splice the ribbon downstream from the cut point to the ribbon wound around the new core, and continue unwinding. A method for unwinding a thin ribbon body characterized in that the thin ribbon body unwound from the old winding core is sucked when cutting the thin ribbon body unwound from the old winding core. Method. (2) A turret arm that rotatably supports at least two old and new winding cores, a support that rotatably supports the turret arm, a cutting device that cuts the thin ribbon unwound from the old winding core, and an old winding core. and a roller that presses the thin ribbon unwound from the core onto the new core, and the thin ribbon unwound from the old core is moved downstream from the cutting part of the ribbon unwound from the old core to the thin ribbon wound around the new core. An unwinding device for a thin strip that continues to be spliced onto a body and continues to unwind, characterized in that a suction nozzle for sucking the thin strip is provided near the thin strip on the upstream side of the cutting part of the thin strip. Unwinding device for thin strips.