JP3642647B2 - Winding shaft switching device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a take-up shaft switching device and a nip roll that are arranged in a printing machine, a coater, or the like and can switch a web between a pair of take-up shafts.
[0002]
[Prior art]
Conventionally, a take-up shaft switching device having a take-up unit and a pair of take-up shafts is arranged in a printing press or a coater. That is, the web processed by the printing machine or the coater is wound on one winding shaft, then switched to the other winding shaft and wound on the other winding shaft.
[0003]
When such a winding shaft is switched, the line temporarily stops, and the web may be switched and the web may be cut.
[0004]
[Problems to be solved by the invention]
At that time, there is a case in which the web is wound up so that the web tip is wound around the winding shaft after the web is cut without the adhesive tape being attached to the winding shaft.
[0005]
When the web tip is wound around the take-up shaft in this way, the web tip may be bent and cannot be reliably wound.
[0006]
The present invention has been made in consideration of the above points, and an object of the present invention is to provide a take-up shaft switching device capable of winding a web tip around a take-up shaft and winding the web reliably.
[0007]
[Means for Solving the Problems]
The present invention has a near roll and a touch roll, and a winding unit that sequentially feeds the web outward through the near roll and the touch roll, a turnable turret disposed close to the winding unit, and a turret And a pair of winding shafts that can be brought into contact with the touch roll, and a pair of winding shafts fixed to the turret and arranged on a straight line perpendicular to a straight line connecting the pair of winding shafts. A pair of guide roller portions that rotate together with the winding shaft, a movable arm that is swingably disposed in the vicinity of the winding unit, and that is provided in the winding unit, and that is provided in the winding unit. And a nip roll that is provided on the movable arm and presses the web against the take-up shaft located on the take-up unit side. The pair of winding shafts consists of an old winding shaft on which a web is wound and a new winding shaft, and the turret turns 180 ° so that the old winding shaft is separated from the winding unit and the new winding shaft is the winding unit. When the web fed out from the take-up unit is wound around one guide roller, the take-up unit approaches the new take-up shaft and the touch roll comes into contact with the new take-up shaft and is movable. A winding shaft that presses a web between a winding unit and one guide roller portion to a new winding shaft by an arm, stops the web, moves the cutter in the width direction of the web, and cuts the web. It is a switching device.
[0008]
According to the present invention, when switching between the pair of winding shafts, first, the pair of winding shafts are turned by the turret, and a new winding shaft comes to the winding unit side. Thereafter, the web is moved to the winding unit by the movable arm, and the web is cut by the cutter while the web is pressed against the winding shaft by the nip roll.
[0009]
Next, in the state where the vicinity of the web tip is held by the rotating body of the nip roll, air is blown to the web tip from the air blowing portion provided on the fixed shaft, and the folding of the web tip is corrected.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1 to 14 are views showing an embodiment of a winding shaft switching device according to the present invention.
[0011]
First, the winding shaft switching device will be described with reference to FIGS. As shown in FIGS. 1A and 1B, the take-up shaft switching device includes a take-up unit 3 having a touch roll 6, a near roll 7 and a guide roll 9 that adjust the tightness of the web 15, and the take-up unit 3. And a pair of winding shafts 1a and 1b fixed to a rotating turret 12 and arranged so as to be in contact with the touch roll 6.
[0012]
Of these, the winding unit 3 feeds the web 15, and the web 15 is wound around the winding shafts 1 a and 1 b by the touch roll 6 from the guide roll 9 through the near roll 7.
[0013]
The turret 12 is provided with a pair of guide roller portions 2 and 2 at positions orthogonal to the pair of winding shafts 1a and 1b. Further, below the winding unit 3, a movable arm 4 for moving the web 15 to the winding unit 3 side is swingably provided.
[0014]
A guide roll 10 for guiding the web 15 is provided at the tip of the movable arm 4, and a nip roll 8 for pressing the web 15 against the winding shafts 1 a and 1 b is attached in the vicinity of the guide roll 10. ing.
[0015]
Next, the nip roll 8 will be described with reference to FIGS. As shown in FIGS. 12 and 13, the nip roll 8 is provided rotatably on the outer periphery of the fixed shaft 8 a fixed to the tip of the holding body 14 and the fixed shaft 8 a, and is disposed at a predetermined interval therebetween. And a plurality of rotating bodies (moving bodies) 8b. An air blowing portion 13 that blows air against the web 15 is provided between the rotating bodies 8b of the fixed shaft 8a.
[0016]
Instead of the rotating body 8b, as shown in FIG. 14, a moving belt (moving body) 15 may be movably provided on the outer periphery of the fixed shaft 8a fixed to the tip of the holding body 14.
[0017]
A cutter 5 is provided at the upper part of the winding unit 3. The cutter 5 is fixed to the rodless cylinder 11, and moves in the width direction of the web 15 when the web 15 is stopped to cut the web 15.
[0018]
Next, the operation of the present embodiment having such a configuration will be described.
First, the start of winding of the web 15 by the winding shafts 1a and 1b will be described. The web 15 is fed from a printing machine or coater (not shown) to the winding unit 3 and then wound around the pair of winding shafts 1a and 1b. In this case, since the adhesive tape is not attached to the winding shafts 1a and 1b, it is necessary to wind the tip of the web 15 around the winding shafts 1a and 1b. Thus, when there is no adhesive tape, the web 15 around the winding shafts 1a and 1b is less likely to be uneven, and the web 15 can be wound up flat.
[0019]
That is, first, as shown in FIG. 2, the web 15 is wound around the old winding shaft 1b with a predetermined winding diameter (see FIG. 2). In this case, the touch roll 6 of the winding unit 3 comes into contact with the web 15 of the old winding shaft 1b and winds the web 15 fed from the guide roll 9 through the near roll 7 around the old winding shaft 1b. The old winding shaft 1b is rotated.
[0020]
Next, as shown in FIG. 3, the winding unit 3 moves away from the web 15 around the old winding shaft 1b. Next, the turret 12 turns 180 ° counterclockwise, and the new winding shaft 1a comes to the winding unit 3 side (FIG. 4). At this time, the web 15 from the winding unit 3 is wound around the guide roller portion 2 positioned below.
[0021]
Next, as shown in FIG. 5, the winding unit 3 approaches the new winding shaft 1a (FIG. 5), and the touch roll 6 of the winding unit 3 comes into contact with the new winding shaft 1a (FIG. 6).
[0022]
Next, as shown in FIG. 7, the movable arm 4 swings counterclockwise and the web 15 is brought to the winding unit 3 side by the guide roll 10 of the movable arm 4.
[0023]
Next, as shown in FIG. 8, the nip roll 8 of the movable arm 4 presses the web 15 against the new winding shaft 1a. Next, the entire line including the winding unit 3 and the pair of winding shafts 1a and 1b is stopped, and the web 15 stopped by the cutter 5 provided in the winding unit 3 as shown in FIG. Disconnected.
[0024]
After that, the new winding shaft 1a is slightly rotated backward by the touch roll 6 and the air blowing portion 13 (see FIGS. 12 and 13) provided on the fixed shaft 8a while the vicinity of the tip of the web 15 is held by the rotating body 8b of the nip roll 8. The air is blown to the tip of the web 15 on the side of the new winding shaft 1a from the reference), so that the folding of the tip of the web 15 around the new winding shaft 1a is corrected. Next, as shown in FIG. 10, the operation of the winding unit 3 is restarted, and the new winding shaft 1 a is restarted by the touch roll 6 of the winding unit 3. In this case, the tip of the web 15 can be reliably wound around the winding shaft 1a by correcting the folding of the tip of the web 15 with air.
[0025]
Next, as shown in FIG. 11, as the nip roll 8 moves away from the new winding shaft 1a, the movable arm 4 swings clockwise and the switching operation of the winding shafts 1a and 1b is completed.
[0026]
As described above, according to the present embodiment, air is blown from the air blowing portion 13 provided on the fixed shaft 8a to the tip of the web 15 while the vicinity of the tip of the web 15 is held by the rotating body 8b of the nip roll 8. The holding position (rotating body 8b) of the web 15 and the air blowing position (air blowing part 13) can be brought close to each other. For this reason, the turning of the tip of the web 15 is corrected.
[0027]
【The invention's effect】
As described above, according to the present invention, air is blown to the web tip from the air blowing portion provided on the fixed shaft in the state where the vicinity of the web tip is held by the rotating body of the niprop roll, and the folding of the web tip is corrected. Is done. Since the web holding position and the air blowing position can be brought close to each other in this manner, the folding of the web tip can be reliably corrected.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of a take-up shaft switching device according to the present invention.
FIG. 2 is a view showing an operation of the take-up shaft switching device.
FIG. 3 is a view showing the operation of the take-up shaft switching device.
FIG. 4 is a view showing the operation of the take-up shaft switching device.
FIG. 5 is a view showing an operation of the take-up shaft switching device.
FIG. 6 is a view showing the operation of the take-up shaft switching device.
FIG. 7 is a view showing the operation of the take-up shaft switching device.
FIG. 8 is a view showing the operation of the take-up shaft switching device.
FIG. 9 is a view showing the operation of the take-up shaft switching device.
FIG. 10 is a view showing the operation of the take-up shaft switching device.
FIG. 11 is a diagram showing the operation of the take-up shaft switching device.
FIG. 12 is a perspective view showing a nip roll.
FIG. 13 is a side view showing a nip roll.
FIG. 14 is a side view showing another nip roll.
[Explanation of symbols]
1a, 1b Winding shaft 2 Guide roller section 3 Winding unit 4 Movable arm 5 Cutter 12 Turret 15 Web

Claims (2)

A winding unit having a near roll and a touch roll, and sequentially feeding the web outward through the near roll and the touch roll;
A swivelable turret arranged so as to be close to the winding unit;
A pair of winding shafts that are fixed to the turret and that can freely contact the touch roll;
A pair of guide roller portions fixed on the turret and arranged on a straight line orthogonal to a straight line connecting the pair of winding shafts, and revolving together with the pair of winding shafts by turning of the turret;
A movable arm that is swingably disposed in the vicinity of the winding unit and moves the web to the vicinity of the winding unit;
A cutter that is provided in the winding unit and moves in the width direction of the web when the web is stopped;
A nip roll that is provided on the movable arm and presses the web against the winding shaft located on the winding unit side;
A pair of winding shafts consists of an old winding shaft on which a web is wound and a new winding shaft,
When the turret turns 180 °, the old take-up shaft leaves the take-up unit, the new take-up shaft comes to the take-up unit side, and the web fed from the take-up unit is wound around one guide roller When the take-up unit approaches the new take-up shaft, the touch roll comes into contact with the new take-up shaft, and the movable arm presses the web between the take-up unit and one guide roller portion against the new take-up shaft. The winding shaft switching device is characterized in that the cutting is stopped and the cutter is moved in the width direction of the web to cut the web.   The nip roll is composed of a fixed shaft and a plurality of moving bodies arranged in a circumferential direction on the outer periphery of the fixed shaft, and arranged at a predetermined interval between each other. The winding shaft switching device according to claim 1, further comprising an air blowing portion that blows air.

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