JPH01220668A - Web continuously connecting and switching device - Google Patents

Abstract

PURPOSE:To prevent unestimated entrainment of an old web and to surely switch from an old roll to a new roll by providing air blowing means for spraying pressurized air to the surface of a web in the vicinity of cutting means. CONSTITUTION:When a web 2a is brought into contact with the second roll 7 by pressure of a nip roller 16, both webs 5a, 5b are connected to each other by a both-sided adhesive tape 23 to start let-off operation of a web from the second roll 7. Immediately after the web 5b starts to be let off, the web 5a is cut by a cutter blade 13 to switch from the old web to the new web. Simulta neously with the above cutting or a little earlier than that, a directional control valve is operated to spray pressurized air from a blowoff nozzle 27 to the web surface. By spraying the pressurized air, the sectional end 5b of the web 5a is blown off to be separate from a web travelling path. Air blowing from the blowoff nozzle is stopped when the separate web 5a stops travelling.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a method for transporting a web such as magnetic tape, paper, aluminum foil, or other polar films from a roll wound around a core. The present invention relates to a continuous web splicing switching device that can switch to the next roll without interrupting the process.

(Prior art) Webs, which are flexible strips of various films such as magnetic tape, paper, aluminium foil, laminated films, printing films, photographic films, cellophane films, and other synthetic resin films, can During the middle stage of the manufacturing process, is most often handled in rolls. When applying the desired processing to the web, a method is often used in which the web is continuously fed out from a roll and subjected to a certain processing while running, and even when the rolls are switched, the running of the web must be interrupted. A continuous web joining switching device is used which can join the webs of the old roll and the new roll without any problems and continuously feed the webs.

The basic structure of the web continuous splicing switching device is shown in FIGS. 5 and 6.

The web continuous joining switching device 1 has a cross-shaped rotating frame 3 rotatably provided on the top of a pedestal 2, and a first web 5a is wound symmetrically around a rotation center 4 of the rotating frame 3. The first roll 6 and the second roll 7 wrapped with the second web 5bi can be mounted, and two pass rollers 8.9 are also provided at symmetrical positions.

As shown in FIG. 5(4), when the web 5& of the first roll 6 is fed out through the pass roller 30 etc. and the web 5 & of the first roll 6 is running low, the rotating frame 3 is moved in the direction of the arrow in the figure. (clockwise).

The first roll 6 and the second roll 7 are rotated by a certain angle so that their positional relationship is almost reversed (Fig. 5(B)
)). At this time, the running route of the running Queg 5a can be appropriately regulated by the /# slow roller 8.

Continuing to the above operation, before the tape 5a wound around the first roll 6 is completely fed out, the web is continuously joined and switched as described below.

As shown in FIG. 6, a welding device 10 is provided between the pass roller 30 and the arm throw roller 8 near where the second roll 7 (new web) is placed. The welding device 10 is equipped with an arm 11 that can rotate at a predetermined angle (in the directions of arrows B and C) about a shaft 12, and the arm 11 is equipped with a cutter blade 13 that moves in the width direction of the web, a T4 slow roller 17, and a nip roller 16. Or is provided. When the Shinogosho [10] configured as described above is not in operation, it is located at the standby position shown by the imaginary line in FIG. (in the direction of arrow B75). At this time, the second roll 7 is rotated at the same speed as the running speed of the web 5a, and an adhesive part such as double-sided adhesive tape is provided at the web tip of the second roll 7. Therefore, the joining device 1o
After the nip roller 16 moves to the operating position, the nip roller 16 moves in the direction of the arrow from the standby position shown by the imaginary line, so that the second roll 7 and the running sea urchin 15m (old web) come into contact with each other. Then, the web sb (new web) of the second roll 7 is pulled out.

Immediately after this, the cutter blade 13 cuts the web 5at- by sliding its supporting body 14 on the slide shaft 15 in the width direction of the web, and cuts the web 5at-to the first roll 6 (old original fabric). Stop rotation.

In this way, the old web and the new web are continuously joined and switched, but the unnecessary web 5 on the first roll 6 side (old original fabric side) cut by the cutter blade 13 is removed as shown in FIG. As shown in FIG. 2, the cut end 6C of the web was sometimes caught between the second roll 7 and the nip roller 16. This entanglement not only causes friction between the web 5a and the web 5b, causing scratches on the web 5bK, but also causes problems such as interfering with the reliable operation of the continuous web joining and switching device 1 itself. There was. This problem increases as the web running speed increases.
(Objective of the Invention) The present invention has been made to solve the above-mentioned problems. It is an object of the present invention to provide a continuous web splicing switching device capable of performing the following steps.

(Structure of the Invention) Such an object of the present invention is that at least one pair of rolls, a first roll wrapped with the first web and a second roll wrapped with the second web completely, is aligned with respect to the rotation center of the rotating frame. It is mounted in a symmetrical position so as to be freely rotatable, and while the first web is fed out from the first roll and is running, the rotating frame is rotated so that the The second roll, which has been rotated on its own axis, is brought close to the nip roller provided on the opposite side of the second roll across the running path, and the first roll is brought into contact with the joining part of the web tip of the second roll. Press the web to connect the first web and the second web.
A web continuous joining and switching device is configured to connect the first web to the first web and to cut off the first web at the rear of the connected portion by a cutting means, the first web being connected to the second web in the vicinity of the cutting means. Continuous joining of webs, characterized in that a blowing means for blowing pressurized air onto the surface is provided, and the first web on the cut first roll side is blown away from the running path by the blowing means. This is accomplished by a switching device.

Embodiments of the present invention illustrated in the drawings will be described below.

FIG. 1 is a side view of essential parts of an embodiment of the continuous web joining and switching device of the present invention. Note that FIG. 1 shows the state in which the old and new bolts are being joined.

The continuous web joining switching device 1 shown in FIG. 1 has a rotating frame 3 provided on a pedestal 2 like the conventional device, and a first roll 6 on which a first web 5a is wound and a second web 5b are wound. A second roll 7 is mounted at a symmetrical position with respect to the rotation center 4. Further, mother rollers 8 and 9 are also provided in the same manner.

The state shown in FIG. 1 is such that the web 51 (old web) of the first roll (old web) is not much left, and the rotating frame 3 is moved clockwise in the figure (in the direction of arrow A) as appropriate in the conventional manner. , after rotation, the joint part [10 is rotated around the shaft 12 (in the direction of arrow B), and the nip roller 16 is operated (in the direction of the arrow). An air cylinder 20 is connected to the other end of the L-shaped plate 19 at an appropriate angle. The air cylinder 20 is rotatably held around the fulcrum 21 of the bent portion.
By increasing the gloss of the nip roller 1,
6 can press the sea urchins 15m to bring them into contact with the second roll 7 (new raw fabric) which is being cylindrically driven.

This embodiment differs from the conventional one in that the joint [10
The air blowing means 25 is attached to the arm 11 of. The air blowing means 25 is provided near the cutter blade 13 that cuts the web 5ai, and more specifically, it is provided between the pass roller 17 and the nip roller 16.

The air blowing means 25 has a plurality of blowing nozzles 27 that open toward the web surface in a cylindrical portion 26 extending in the width direction of the web, and the cylindrical portion 26 is equipped with a pump 29 and the like as shown in FIG. The ventilation source is connected. Further, a switching valve 28 is provided between the cylindrical portion 26 and the pump 29, so that the timing of air blowing can be adjusted.

The cutter blade 13 is the same as that shown in FIG. 6, and has a structure fixed to a support body 14 slidably held on a slide shaft 15.
It is designed to move quickly in the width direction of the web between it and the tossing roller 18. Although the structure for operating the support body 14 will not be described in detail, for example,
The structure is similar to that disclosed in Japanese Utility Model Publication No.-89497 and Japanese Utility Model Publication No. 61-43794. - The joining of the new and old webs and the switching operation between the new and old side rolls 6 and 7 using the apparatus configured as described above will be described.

When the web 5a and the second roll 7 come into contact with each other due to the compression of the nip roller 16 as described above, a Double-sided adhesive tape 2, which is the joint
3, the two webs 5m and 5b are connected, and feeding of the web from the second roll 7 is started.

Note that the tip of the web 5b on which the double-sided adhesive tube 23 is provided is fixed with a tear-preventing tape 24 so as not to turn over during the pre-driving of the second roll 7; Since the adhesive strength of the tape 24 is superior to that of the anti-clinging tape 24, the old and new webs can be easily connected by the method described above.

Immediately after the feeding of the web 5b is started, the cutter blade 13 cuts the web 5a and switches between the old and new webs. At the same time as this cutting, or at a slightly earlier timing, the switching valve 28 is operated to blow pressurized air from the blowing nozzle 27 toward the web surface. By this blowing of pressurized air, the cut end 6b of the web 5& is blown away from the web travel path. Further, when the cutting of the sea urchin 1 is completed, the rotation of the first roll 60 is stopped or the rotation of the first roll 6 is stopped completely.9. As a result, the cut end 6C tries to run in the direction of the second roll 7, but since it is blown off by the blowing nozzle 27 as described above, the cut end 6C moves toward the second roll 7.
Troubles such as being caught between the roll 7 and the nip roller 16 are reliably prevented. Incidentally, at the point in time when the open air pump 5a stops running, the air blowing from the blow-off nozzle 27 is stopped by the switching valve 28.

When the feeding of the web 5b is started, the nip roller 16 operates in a direction opposite to the direction of the arrow (in the opposite direction of the arrow), and the arm 11 moves along the imaginary line in FIG. Return to the standby position indicated by . On the other hand, the first
Roll 6 is removed and replaced with a new roll in preparation for the next switching operation.

In the embodiment described above, the blowing nozzle 27 was provided behind the cutter blade 13 (downstream in the web running direction), but the present invention is not limited to this embodiment, and the blowing nozzle 27 is provided behind the cutter blade 13 (downstream in the web running direction). It may be provided at the front. Moreover, the blowing part of the pressurized air is the blowing nozzle 2.
It goes without saying that the structure is not limited to the structure shown in 7, but can be modified in various ways, such as configuring it in a slit shape, for example.

(Effects of the Invention) As described above, the web continuous joining switching device of the present invention is provided with a blowing means for blowing pressurized air onto the web surface in the vicinity of the cutting means for cutting off the old web. Since the structure is such that the cut old web is blown away from the web running path, it is possible to reliably prevent the cut old web of annual bonds from being caught in the running path of the new web. can do. Therefore, it is possible to avoid troubles such as damage to the new web due to the entanglement of the old web and equipment failure, and it is also possible to increase the running speed of the que 1 than before, thereby improving productivity. be able to.

[Brief explanation of the drawing]

Fig. 1 is a side view of the manufacturing part of an embodiment of the sea urchin 1 continuous joining and switching device of the present invention, Fig. 2 is a perspective view of the machine part of the device shown in Fig. 1, and Fig. 3 is a schematic diagram showing the blowing means. , FIG. 4 is a schematic view showing the web tip of the new roll, FIG. 5 is a schematic front view of the conventional device, and FIG. 6 is a partially enlarged view of the device shown in FIG.
FIG. 7 is a perspective view of the apparatus shown in FIG. 5 during web cutting. 1... Web continuity, joining switching device, 2... Frame,
3... Rotation frame, 4... Rotation center, 5a... First web (old web), 5b... Second web (new web), 6... First roll (old roll) ), 6c...cut i, 7...second roll (new roll), 8,9.17
,18゜30...Riya slow roller, 10...Joining device,
DESCRIPTION OF SYMBOLS 11... Arm 1, 12... Shaft, 13... Cutter blade, 14... Support body, 15... Slide shaft, 1
6... Nila Glow 2.19... L-shaped plate, 20
... air cylinder, 21 ... fulcrum, 23 ... double-sided adhesive tape, 24 ... tear prevention tape, 25-.
- Air blowing means, 26-- cylinder section, 27-- blowing nozzle, 28-- switching valve, 29-- pump. Figure 3 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] At least one pair of rolls, a first roll wound with a first web and a second roll wound with a second web, are rotatably mounted at symmetrical positions with respect to the rotation center of the rotation frame,
While the first web is fed out from the first roll and is running, the rotating frame is rotated to bring the second roll, which has been rotated in advance, close to the running path of the first web, and A nip roller provided on the opposite side of the second roll across the first web presses the first web against the joint portion of the web tip of the second roll, thereby separating the first web and the second roll. The continuous web joining and switching device connects the first web to the first web and cuts off the first web behind the connected portion using a cutting means, wherein pressurized air is applied to the surface of the web in the vicinity of the cutting means. 1. A continuous web joining and switching device, comprising: a blowing means for blowing the first web, and the blowing means blows off the cut first web on the first roll side so as to remove it from the running path.