JPH10212060A - Winding shaft switching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To positively perform winding shaft switching action between a pair of winding shafts regardless of whether a pressure sensitive adhesive tape is fitted to the winding shaft or not. SOLUTION: In case of switching between a pair of winding shaft, a pair of winding shafts are turned by a turret 12, and the new winding shaft moves onto a winding unit 3 side. A movable arm 4 is rotated counterclockwise, and a web 15 is moved onto the winding unit 3 side by the movable arm 4. The web 15 is then pressed to the winding shaft by a nip roller 8 of the movable arm 4, and the web 15 stops. The web 15 is then cut by a cutter 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding shaft switching device and a nip roll which are arranged in a printing machine or a coater and can switch a web between a pair of winding shafts.

[0002]

2. Description of the Related Art Conventionally, a winding shaft switching device having a winding unit and a pair of winding shafts is arranged in a printing machine 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.

When the winding shaft is switched, the line is temporarily stopped, and the web may be switched and the web may be cut.

[0004]

At this time, there is a case where the adhesive tape is not attached to the winding shaft, and the web is wound so that the leading end of the web is wound around the winding shaft after cutting the web. is there.

[0005] When the web tip is wound around the winding shaft as described above, the web tip may be bent and the winding may not be performed reliably.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to provide a winding shaft switching device capable of winding the leading end of the web around the winding shaft and reliably winding the web. And

[0007]

SUMMARY OF THE INVENTION The present invention relates to a winding unit, a pair of winding shafts which are arranged to be close to the winding unit and rotate turret, and are provided at positions orthogonal to the pair of winding shafts. A pair of guide rollers arranged and turret-rotated together with a pair of winding shafts, a movable arm that is swingably disposed near the winding unit and moves the web to the winding unit, and provided on the winding unit. A cutter and a nip roll provided on the movable arm and pressing the web against a take-up shaft positioned on the take-up unit side, the movable arm moves the web to near the take-up unit, and the nip roll takes up the web with the nip roll. A cutting shaft switching device and a fixed shaft, characterized in that the web is cut by a cutter while pressing the fixed shaft, and movably provided on the outer periphery of the fixed shaft, a predetermined distance between each other. Nip rolls, characterized in that a plurality of moving bodies are Oite arranged, the fixed shaft between the moving body is an air blowing portion for blowing air against the web is provided.

According to the present invention, when switching is performed between a pair of winding shafts, the pair of winding shafts are first 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.

Next, while the vicinity of the leading end of the web is held by the rotating body of the nip roll, air is blown from the air blowing portion provided on the fixed shaft to the leading end of the web to correct the turning of the leading end of the web.

[0010]

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.

First, a winding shaft switching device will be described with reference to FIGS. 1 (a) and 1 (b). As shown in FIGS. 1A and 1B, the winding shaft switching device includes a winding unit 3 having a touch roll 6, a near roll 7, and a guide roll 9 for adjusting the winding hardness of the web 15, and a winding unit 3. And a pair of take-up shafts 1a and 1b fixed to a turret 12 which is arranged so as to freely contact the touch roll 6 and turns.

The winding unit 3 feeds out the web 15, and the web 15 is fed from the guide roll 9 via the near roll 7 by the touch roll 6 to the winding shaft 1 a.
1b.

The turret 12 has a pair of winding shafts 1.
A pair of guide roller portions 2 and 2 are attached at positions orthogonal to a and 1b. A movable arm 4 for moving the web 15 toward the winding unit 3 is provided below the winding unit 3 so as to be swingable.

At the tip of the movable arm 4, a web 15
Is provided, and a web 15 is wound around the winding shaft 1 a near the guide roll 10.
A nip roll 8 for pressing against 1b is attached.

Next, the nip roll 8 will be described with reference to FIGS. As shown in FIGS. 12 and 13, the nip roll 8 is rotatably provided on a fixed shaft 8 a fixed to the tip of the holding body 14 and on the outer periphery of the fixed shaft 8 a.
It comprises a plurality of rotating bodies (moving bodies) 8b arranged at a predetermined interval between each other. Further, an air blowing portion 13 for blowing air to the web 15 is provided between the rotating bodies 8b of the fixed shaft 8a.

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, instead of the rotating body 8b. .

A cutter 5 is provided above the winding unit 3.
Is provided. The cutter 5 is a rodless cylinder 11
When the web 15 is stopped, the web 15 moves in the width direction of the web 15 and cuts the web 15.

Next, the operation of this embodiment having the above-described configuration will be described. First, a description will be given of when the winding of the web 15 by the winding shafts 1a and 1b is started. The web 15 is sent from a printing machine or a coater (not shown) to the winding unit 3 and then wound around a 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 leading end of the web 15 around the winding shafts 1a and 1b. When there is no adhesive tape as described above, the web 15 around the winding shafts 1a and 1b is hardly uneven, and the web 15 can be wound flat.

That is, as shown in FIG. 2, first, 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 contacts the web 15 of the old winding shaft 1b, and the web 1 sent out from the guide roll 9 via the near roll 7 is used.
5 around the old winding shaft 1b and the old winding shaft 1b.
To rotate.

Next, as shown in FIG. 3, the winding unit 3 is separated from the web 15 around the old winding shaft 1b. Next, the turret 12 is turned 180 ° in the counterclockwise direction, and the new winding shaft 1 is rotated.
a 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 unit 2 located below.

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 contacts the new winding shaft 1a (FIG. 6). .

Next, as shown in FIG. 7, the movable arm 4 swings counterclockwise and the guide roll 10 of the movable arm 4 brings the web 15 to the winding unit 3 side.

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 1 stopped by the cutter 5 provided in the winding unit 3 as shown in FIG.
5 is cut in the width direction.

Thereafter, the new winding shaft 1 is moved by the touch roll 6.
a is slightly rotated in the reverse direction, and the fixed shaft 8a
Air is blown from the air blowing portion 13 (see FIGS. 12 and 13) provided to the front end of the web 15 on the side of the new winding shaft 1a, and the turn of the front end of the web 15 around the new winding shaft 1a is corrected. You. Next, as shown in FIG. 10, the operation of the winding unit 3 is restarted, and the touch roll 6 of the winding unit 3 is restarted.
As a result, the new winding shaft 1a resumes rotation. In this case, by correcting the turn of the front end of the web 15 by air, the front end of the web 15 can be reliably wound on the winding shaft 1a.

Next, as shown in FIG.
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 ends.

As described above, according to the present embodiment, while the vicinity of the leading end of the web 15 is held by the rotating body 8b of the nip roll 8, the air blowing portion 1 provided on the fixed shaft 8a
Since air is blown from 3 to the tip of the web 15, the web 1
5 can be brought closer to the holding position (rotary member 8b) and the air blowing position (air blowing portion 13). Therefore, the turning of the tip of the web 15 is corrected.

[0027]

As described above, according to the present invention, air is blown from the air blowing section provided on the fixed shaft to the web tip while the vicinity of the web tip is held by the rotating body of the nip lop roll. Tip wrapping is fixed.
Since the web holding position and the air blowing position can be made closer to each other in this manner, the turning of the leading end of the web can be reliably corrected.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a winding shaft switching device according to the present invention.

FIG. 2 is a diagram showing the operation of a winding shaft switching device.

FIG. 3 is a diagram showing the operation of a winding shaft switching device.

FIG. 4 is a diagram showing the operation of the winding shaft switching device.

FIG. 5 is a diagram showing the operation of the winding shaft switching device.

FIG. 6 is a view showing the operation of the winding shaft switching device.

FIG. 7 is a diagram showing the operation of the winding shaft switching device.

FIG. 8 is a view showing the operation of the winding shaft switching device.

FIG. 9 is a view showing the operation of the winding shaft switching device.

FIG. 10 is a diagram showing the operation of the winding shaft switching device.

FIG. 11 is a view showing the operation of the winding 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.

[Description of Signs] 1a, 1b Take-up shaft 2 Guide roller unit 3 Take-up unit 4 Movable arm 5 Cutter 12 Turret 15 Web

Claims (3)

[Claims] 1. A winding unit, a pair of winding shafts arranged so as to be close to the winding unit and rotating turret, and a pair of winding shafts arranged at positions orthogonal to the pair of winding shafts. A pair of guide rollers that rotate turret together, a movable arm that is swingably disposed near the winding unit and moves the web to a position near the winding unit, a cutter provided on the winding unit, and a movable arm. A nip roll that presses the web against the take-up shaft located on the take-up unit side. A winding shaft switching device for cutting. 2. The nip roll comprises a fixed shaft and a plurality of moving bodies which are movably provided on the outer periphery of the fixed shaft and are arranged at a predetermined interval between each other. 2. The winding shaft switching device according to claim 1, further comprising an air blowing unit for blowing air to the winding shaft. 3. A fixed shaft, and a plurality of moving members movably provided on an outer periphery of the fixed shaft and arranged at a predetermined distance from each other, and a fixed shaft between the moving members is provided on a web. A nip roll provided with an air blowing section for blowing air thereto.