JPH01187156A - Automatic change for web winding core - Google Patents

Abstract

PURPOSE:To prevent bending and wrinkling in the starting end portion of a web to be wound up by boring a lot of small holes in the peripheral surface of a new winding core and connecting pressure reducing means to the end surface of the new winding core. CONSTITUTION:When a former winding core amounts to a designated winding amount, air cylinders 62, 82 for arms are operated to make the front portions of upper and lower arms 60, 80 approach a new winding core 52, the core is rotated and the rotating speed is made substantially equal to the traveling speed of a web A. The hollow portion of the new winding core 52 is decompressed. After that, an air cylinder 76 is operated to move a cutter member 72, whereby the web A is cut by a cutter 74. By this arrangement, the new starting end of the web A is sucked by a lot of small holes 53 bored in the peripheral surface of the new winding core 52 to be brought close to the peripheral surface of the new winding core 52, so that the web is taken up on the new winding core 52 without bending or wrinkling.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an automatic web winding core changing device, and more specifically, in a web winding device, the core can be replaced with an old core without stopping the running of the web. The present invention relates to a device for automatically replacing a take-up core with a new take-up core.

[Prior Art] As shown schematically in FIG. 4, the above-mentioned automatic web winding core exchange device replaces the old winding core that is currently winding web A, and replaces the web with respect to this old winding core. A cylindrical new take-up core 52 which is arranged at the rear in the running direction of A and is on standby;
A nip roll 86 arranged rearward in the running direction, a guide roll 7 (l) arranged near the new take-up core 52 and ahead of the new take-up core 52 in the running direction of the web A, and a new take-up core 5
2 and a cutter 74 for cutting the web, which is arranged between the guide roll 70 and the guide roll 70, is known.

In this automatic web take-up core exchange device, the running web A is made to run along the circumferential surface of the new take-up core 52, and the rotational speed of the new take-up core 52 is set to be approximately equal to the running speed of the web A. Then, when the new and old cores are to be replaced, the cutter 74 is operated to cut the web A stretched by the new take-up core 52 and the guide roll 70. In this way, the end of the web A on the rear side of the cut point becomes a new starting end AI, and the web A is wound onto the new winding core 52 from this starting end AI, and the winding core is replaced.

[Problems to be Solved by the Invention] In the above-mentioned automatic web winding core changing device, the new starting end At that is generated when the web A is cut is slightly away from the circumferential surface of the new winding core 52, and Due to inertia, the new take-up core 5 is bent into a hook shape or wrinkled into a mountain shape as shown in FIG.
Sometimes it gets caught up in 2.

Subsequent portions of the web are wound over the bent or wrinkled starting end A1, resulting in folds and wrinkles near the core center of the web roll, resulting in defective products. When the thickness of the web is as thin as 6 to 12 microns, these folds and wrinkles remain far outside the web roll, which poses a difficult problem.

In view of the above, an object of the present invention is to provide an automatic web winding core changing device that can eliminate folds and wrinkles at the starting end of a web to be wound and can produce a high-quality web roll.

[Means for Solving the Problems] The automatic web winding core changing device according to the present invention replaces an old winding core that is currently winding a web, and replaces the old winding core with respect to the old winding core in the direction in which the web runs. A cylindrical new take-up core that is on standby, a nip roll arranged behind the new take-up core in the web running direction near the new take-up core, and a new take-up core near the new take-up roll. An automatic web winding core changing device comprising a guide roll disposed in front of the web in the running direction of the web, and a cutter for cutting the web disposed between the new winding core and the guide roll. A large number of small holes are bored in the circumferential surface of the new winding core, and a pressure reducing means is connected to the end surface of the new winding core.

[Function] When replacing the web take-up core using the automatic web take-up core changing device according to the present invention, operate the decompression means a little before the time to replace the take-up core to replace the new take-up core. After reducing the pressure in the hollow part of the machine, the cutter is activated to cut the running web. In this way, the starting end of the web is attracted to the many small holes in the new take-up core and comes into close contact with the circumferential surface of the new take-up core, so that the starting end of the web is not bent as would occur when the starting end is separated from the web roll. Well, the material is wound onto the new take-up core without wrinkles.

[Embodiment] Hereinafter, an embodiment of an automatic web winding core changing device according to the present invention will be described with reference to FIGS. 1 to 3.

FIG. 1 shows a plan view of the web winding device 1, and the web A to be wound runs inside this device 1 from the top to the bottom in FIG.

A pair of left and right bases 10 are provided on the left and right sides of the web winding device 1.
．． 11 are arranged, and these bases 10.11 support a rotating shaft 12 in their upper parts. A gear 13 is fixed to the left end of the rotating shaft 12, and the rotating shaft 12 receives rotational force from a motor (not shown) through the gear 13.

On the rotating shaft 12, inside the left and right bases 10.11,
Left and right arms 18, 18 are provided to project in the front and rear directions, respectively.

Air cylinder mounting members 20.21 having an angular cross-section are attached to both the front and rear ends of the left arm 10, and the cylinder tube of the air cylinder 22 is attached to the rotating shaft 12 side of these air cylinder mounting members 20.21. Fixed.

At the ends of the front and rear air cylinder mounting members 20 and 21 opposite to the rotating shaft 12, there is a guide tube 24 extending left and right.
．． 25 are fixed, and these guide cylinders 24.25
A cone support shaft 28, 27 slidably passes through the hollow interior of the cone support shaft 28,27. The cone support shafts 26, 27 are formed in a cylindrical shape, and at the right end of these cone support shafts 26, 27 there is a truncated cone-shaped left cone 38.27 having a through hole therein.
38 is rotatably supported.

One end of a flexible hose 28 is connected to the left end of the rear cone support shaft 27, and the other end of the flexible hose 28 is connected to a blower 30 serving as air suction means. By doing this, the left cone 3
The through hole 8 is connected to the inside of the blower 30 via the cone support shaft 27 and the flexible hose 28 .

One end of a plate-shaped connecting member 32 is attached to the tip of the piston rod 23 of the air cylinder 22, and a cone support shaft 26, 27 is fixed to the other end of this connecting member 32. By doing so, when the air cylinder 22 is actuated, the cone support shafts 28, 27 slide in the left-right direction inside the guide cylinder 24, and the left cone 38 similarly moves in conjunction with this.

A cylindrical shaft 34 is attached to both the front and rear ends of the right arm 18 in the left-right direction. The shaft 34 rotatably supports a cone support shaft 42 inside thereof,
This cone support shaft 42 supports a truncated conical right cone 40 at its left end. A rotating handle 44 is attached to the left end of the shaft 34, and when the rotating handle 44 is rotated, the cone support shaft 42 slides in the left-right direction, and the right cone 40 also moves in conjunction with this. The right end of the cone support shaft 42 is connected to a motor (not shown) via a suitable transmission means, and by rotating this motor, the cone support shaft 42 and, by extension, the right cone 40 are also rotated.

A cylindrical old winding core 50 and a new winding core 52 are arranged between the front and rear pair of left and right cones 38 and 40, respectively. Tapered recesses corresponding to the frustoconical shapes of the left and right cones 38.40 are provided at both ends of these new and old winding cores 52. The tapered portion of the winding core 52 . is inserted into the new winding core 52 .
It rotates 50 times.

A large number of small holes 53 are bored in the circumferential surfaces of the new and old winding cores 52 and 50, and when the blower 30 is operated, the inside of the new winding core 52 becomes negative pressure. The web A running along the surface of the winding core 52 is attracted to this new winding core 52. The diameter and pitch of these small holes 53 are not particularly limited, but when the outer diameter of the new winding core 52 is 1721 mm, it is preferable that the diameter is 2I1 m and the pitch is 20 mm.

As shown in FIG. 2, an upper arm 60 shaped like an arrow is disposed above the new take-up core 52. As shown in FIG. The upper arm 60 is rotatably supported at the rear thereof, and an arm air cylinder 82 is attached above the central portion in the longitudinal direction.
By operating the upper arm 60, the front part of the upper arm 60 can be rotated in the vertical direction.

A nip roll support arm 64 is rotatably supported below the center of the upper arm 60.
An upper nip roll 6B that adjusts the winding appearance of the web A to be wound up is rotatably supported at the front end of the web A. In this case, an air cylinder 68 is attached to the lower part of the support arm 64, and by operating this air cylinder 68, the strength with which the upper nip roll 6B contacts the new take-up core 52 can be adjusted. . In addition, in this way, the upper nip roll 6B is placed above the new take-up core 52.
If you arrange the web A, the winding appearance will be better arranged, but
It is also possible to omit this upper nip roll 66.

An upper guide roll 70 is rotatably supported at the front end of the upper arm 60, and this upper guide roll 70 guides the web A running along the surface of the new winding core 52 toward the old winding core 50. It guides and applies tension to the running web A.

Approximately Z is located above the support arm B4 in the upper arm BO.
A letter-shaped cutter support member 72 is rotatably supported, and this cutter support member 72 supports a cutter 74 for cutting the web A at its rear end. Cutter support member 7
The front end of 2 is connected to the upper arm BO via the air cylinder 7B.
When the air cylinder 76 is operated, the cutter support member 72 moves, and the cutter 70 cuts the running web A.

Below the new number of turns core 52 is an inverted lower arm 8.
0 is placed. The lower arm 80 is rotatably supported at its rear, and an arm air cylinder 82 is attached to the lower middle part of the lower arm 80. By operating this air cylinder 82, the front part of the lower arm 80 is moved. It can be rotated up and down.

A support arm 84 for a nip roll 8B is rotatably supported above the center of the lower arm 80, and a lower nip roll 8B that adjusts the winding shape of the web A to be wound is rotated at the front end of this support arm 84. freely supported. In this case, the support arm 84 has an air cylinder 88
is attached, and by operating this air cylinder 88, the strength with which the lower nip roll 8B contacts the web A can be adjusted.

A lower guide roll 90 is rotatably supported at the front end of the lower arm 80 and guides the web A to the core 52 with the new number of turns.

A guide roll support arm 92 is disposed on the rotating shaft 12 in the vertical direction inside the left and right arms IL18, and guide rolls 94 are disposed at both ends of the support arm 92.
is arranged, and this guide roll 94 guides the web A to the old winding core 50.

Hereinafter, a method of replacing the core for winding a web from the old winding core 50 to the new winding core 52 using the automatic web winding core changing device according to the embodiment will be described.

First, while the old winding core 50 is winding the web A, the upper arm 60 and the lower arm 80 are in a state separated from the new winding core 52, as shown in FIG. The web A approaching the winding core 1 is guided above the upper guide roll 94 and reaches the old winding core 50 while contacting the lower guide roll 70 and the circumferential surface of the new winding core 52.

When the old winding core 50 reaches a predetermined winding amount, the arm air cylinders 82, 82 are operated, and the front parts of the upper and lower arms 60, 80 are moved as shown by the arrows in FIG. When approaching the new number of turns core 52, both this new number of turns core 5
2 is rotated, and its rotational speed is made approximately equal to the traveling speed of web A.

Further, the blower 30 is operated in parallel with the rotation of the new number of turns core 52 to reduce the pressure in the hollow part of the new number of turns core 52.

After doing as described above, the air cylinder 76 is operated to move the cutter member 72, and the web A is cut by the cutter 74. In this way, the new starting end of the web A is attracted to the large number of small holes 53 drilled in the circumferential surface of the new number of turns core 52 and comes into close contact with the circumferential surface of the new number of turns core 52, thereby preventing it from being bent or wrinkled. The core 52 is wound with a new number of windings without causing any problems.

As mentioned above, outer diameter 17211% hole diameter 2cm, pitch 20m
In a web winding device for winding a polyester film with a thickness of 14 μ-1 and a width of 500 + n, using the new core 52 with the new number of turns, and setting the internal pressure of the new number of turns core 52 to 300 m5 Aq, and traveling at 350 m/l 1 inch. When the core for winding the web was replaced from the old winding core 50 to the new core 52, the starting end of the web A was wound onto the new core 52 without being bent or wrinkled.

[Effects of the Invention] In the automatic web winding core changing device according to the present invention, the starting end of the web can be sucked through the many small holes of the new winding core and brought into close contact with the circumferential surface of the new winding core. Since the starting end of the web is wound onto a new core without folding or wrinkling, a high quality web roll can be produced.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a web winding device equipped with an automatic web winding core changing device according to an embodiment of the present invention, and FIG. 2 is a plan view of the automatic web winding core changing device of FIG. 3 is a side view of the web winding device of FIG. 1; FIG. FIGS. 4 and 5 schematically show a conventional automatic web winding core changing device, with FIG. 4 showing the web before it is cut, and FIG. 5 showing it after the web is cut. Explanation of symbols A... Web 30... Blower 50... Old winding core 52... New winding bottom core 53... Hole 66 ...Upper nip roll 70...Upper guide roll 74...Cutter 86...Lower nip roll 90...Lower guide roll Patent applicant Hirano Metal Co., Ltd. Representative Patent Attorney Tsuta 1)
筋子：i：、↑"1(2 others 19., -5J Figure 4 Figure 5

Claims (1)

[Claims] 1. An old winding core that is currently winding a web, a new cylindrical winding core that is waiting behind the old winding core in the running direction of the web, and this new winding core. a nip roll arranged near the take-up core and behind the new take-up core in the web running direction; a guide roll arranged near the new take-up roll and ahead of the new take-up core in the web running direction; In an automatic web take-up core changing device comprising a new take-up core and a cutter for cutting the web disposed between a new take-up core and a guide roll, a large number of small holes are bored in the circumferential surface of the new take-up core; , an automatic web winding core changing device characterized in that a pressure reducing means is connected to the end face of the new winding core.