JP7589006B2 - Splicing device for web unwinding device - Google Patents

Description

The present invention relates to a splicing device for a web unwinding device.

There is an unwinding device that continuously unwinds webs such as film, paper, fabric, and metal foil (see, for example, Patent Document 1). This unwinding device can replace an unwinding roll that has been unwound and has only a small amount of web remaining (hereinafter referred to as the "old unwinding roll") with a new unwinding roll (hereinafter referred to as the "new unwinding roll") that is fully wound with the web, without stopping the conveying line, and a splicing device provided in this unwinding device performs a splicing operation in which the old web unwound from the old unwinding roll is overlapped and joined to the new web unwound from the new unwinding roll.

In conventional splicing devices, after the old web and the new web are joined together, the old web is cut widthwise with a cutter, and sometimes the cut end of the old web sticks to the outer circumferential surface of the new unwinding roll due to static electricity.

For this reason, the applicant previously proposed a splicing device that cuts the old web with a cutter while blowing air from a nozzle on one outer side of the web to prevent the cut end of the old web from sticking to the new web (see Patent Document 2).

JP 2001-180853 A Patent No. 5085301

However, in the above splicing device, one nozzle blows air from the outside of one side of the web, so with a wide web, the air does not reach the cut end on the opposite side to the nozzle, and the cut end may stick to the outer periphery of the new unwinding roll due to static electricity.

In view of the above problems, the present invention aims to provide a splice device for a web unwinding device that ensures that the web does not stick to the outer peripheral surface of the new unwinding roll when cut, regardless of whether the web is narrow or wide.

The present invention relates to a splicing device for a web unwinding device in which two unwinding rolls with a web wound thereon are rotatably attached between a pair of left and right arms, and the arms are rotated to switch the old unwinding roll, which is nearing the end of unwinding the web, to a new unwinding roll on which the web is fully wound, while unwinding the web. The splicing device includes a pair of left and right splicing arms rotatable about a rotation axis disposed in the left and right direction , guide rolls rotatably provided at the tips of the pair of left and right splicing arms for guiding the old web from the old unwinding roll to the outside, and a pair of splicing arms for rotating the rotation axis. a pressure roll that is rotatably provided on a pair of left and right splice arms between the guide roll and the guide roll, and presses the old web guided outward by the guide roll against an adhesive member provided on the new web wound around the new unwind roll; a beam member that is spanned in the left and right direction on the pair of left and right splice arms between the pressure roll and the guide roll, and a beam member that is provided on the side of the old web guided by the guide roll and the pressure roll, and a pressure roll that presses the old web guided outward by the guide roll and the old web guided from the guide roll to the pressure roll The apparatus includes a running section having a cutter for cutting the old web while running in the width direction of the old web after the new web is connected to the old web, and a nozzle attached to the running section and running together with the cutter in the width direction of the old web between the guide roll and the pressure roll, blowing air onto the cut end of the old web that is guided from the guide roll to the pressure roll, and blowing the cut end to a position away from the outer circumferential surface of the new web wound around the new unwind roll, and one end of a flexible and stretchable hose is attached to a base of the nozzle. a splice device for a web unwinding device, the splice device being attached to a rotating shaft such that when the pressure roll is pressing the old web, the splice arms are disposed above the pair of left and right splice arms and on the rotating shaft side of the pressure roll in the direction in which the splice arms extend from the rotating shaft , a base member is provided in the center of the width direction of the web, the other end of the hose is connected to the base member, and the base member is connected to a supply means for sending air via an air piping, and the one end of the hose moves along the width direction of the web with the base member as its center.

According to the present invention, the nozzle blows air while traveling in the width direction of the old web together with the traveling part, so that the air hits the entire width direction of the old web from one end to the other, and the cut end of the old web does not stick to the new web.

1 is a front view of an unwinding device according to an embodiment of the present invention; FIG. 1 is a diagram of the first step of the unwinding device. This is also a drawing of the second process. This is also a drawing of the third process. This is also a drawing of the fourth process. This is also a drawing of the fifth process. This is also a drawing of the sixth process. FIG. 2 is a perspective view of the splice device, in which the pressure roll and the guide roll are omitted. FIG. 2 is a side view of the splicing device in a state in which the old web is about to be nipped to the new web by the pressure roll. FIG. 2 is a front view of the splice device in a state in which the web is about to be cut. FIG. 1 is a bottom view of the splicing device in a state in which the web is cut by the cutter while air is being blown by the nozzle. FIG.

Below, an unwinding device 100 and a splicing device 20 for a long web W according to one embodiment of the present invention will be described with reference to Figures 1 to 13. The web W is a long film, paper, fabric, metal foil, etc.

(1) Structure of the Unwinding Device 100 The unwinding device 100 having the splicing device 20 will be described with reference to FIGS. 1 and 3. FIG.

Figure 1 is a front view of the unwinding device 100, and Figure 3 is a side view. A pair of left and right support legs 3, 3 stand upright from a base 1 of the unwinding device 100, and a rotating support shaft 2 is rotatably mounted on the pair of left and right support legs 3, 3.

A pair of left and right arms 4, 4 and a pair of left and right arms 6, 6 protrude from the rotating support shaft 2 at a distance of 180°. An unwinding roll that winds the web W is rotatably attached to the pair of left and right arms 4, 4. Hereinafter, the unwinding roll attached to these arms (hereinafter referred to as the "old arms") 4, 4 will be referred to as the "old unwinding roll" 8. In addition, a unwinding roll 10 is also rotatably attached to the pair of left and right arms (hereinafter referred to as the "new arms") 6, 6. Hereinafter, the unwinding roll 10 attached to these pair of left and right arms 6, 6 will be referred to as the "new unwinding roll" 10.

The old unwinding roll 8 and the new unwinding roll 10 have bobbins attached to their rotating shafts for winding the web W. In the following explanation, when the old web (hereafter referred to as the "old web") W wound around the old unwinding roll 8 becomes low, a new web (hereafter referred to as the "new web") W is pulled out from the fully wound new unwinding roll 10. A double-sided adhesive tape 22 is attached to the tip of the new web W on the new unwinding roll 10 in the width direction, so that it can be connected to the old web W.

Between the pair of left and right old arms 4, 4 and the new arms 6, 6, a pair of left and right auxiliary arms 13, 13 and a pair of left and right auxiliary arms 15, 15 protrude from the rotating support shaft 2. An auxiliary roll 12 is rotatably attached to the pair of left and right auxiliary arms 13, 13, and an auxiliary roll 14 is rotatably attached to the pair of left and right auxiliary arms 15, 15. The four pairs of old arms 4, 4, auxiliary arms 13, 13, new arms 6, 6, and auxiliary arms 15, 15 each protrude from the rotating support shaft 2 at 90° intervals.

As shown in FIG. 1, a motor (hereinafter referred to as the "main motor") 7 for rotating the rotary support shaft 2 is attached to one of the support legs 3. This main motor 7 is, for example, an AC servo motor.

As shown in FIG. 1, the old unwinding roll 8 rotates by power transmitted by a chain or the like from a motor (hereinafter referred to as the "old motor") 9 provided on the support leg 3. The old motor 9 is, for example, an AC servo motor.

As shown in FIG. 1, the new unwinding roll 10 rotates by power transmitted by a chain or the like from a motor (hereinafter referred to as the "new motor") 11 provided on the support leg 3. The new motor 11 is, for example, an AC servo motor.

As shown in FIG. 3, a splice device 20 for splicing the old web W and the new web W is provided behind the old unwinding roll 8. The splice device 20 will be described in detail later.

(2) Splice device 20
Next, the structure of the splice device 20 for the web W will be described with reference to FIGS.

The pair of left and right splice arms 26, 26 can rotate around a rotation shaft 28 provided on a frame (not shown) on the side of the pair of left and right support legs 3, 3, and the tips of the pair of left and right splice arms 26, 26 can move toward or away from the outer peripheral surface of the new web W wound around the new unwind roll 10. The pair of left and right splice arms 26, 26 are rotated around the rotation shaft 28 by an arm air cylinder attached to a frame (not shown) (see FIG. 2).

The guide roll 16 is rotatably attached to the tip of the pair of left and right splice arms 26, 26 using a pair of left and right bearings 32.

A pressure roll 24 is rotatably attached to a pair of left and right splice arms 26, 26 between the guide roll 16 and the rotating shaft 28. The pressure roll 24 is connected to air cylinders 36, 36 attached to the inside of the pair of left and right splice arms 26, 26 via a pair of left and right crank members 34. By operating the pair of left and right air cylinders 36, 36, respectively, the pressure roll 24 attached to the pair of left and right crank members 34, 34 can nip the old web W to the outer peripheral surface of the new web W wound around the new unwind roll 10.

Between the pressure roll 24 and the guide roll 16, a cutter drive device 30 is attached in the left-right direction (width direction of the web W). The cutter drive device 30 will be described. The cutter drive device 30 has a beam member 38 that is installed between a pair of left and right splice arms 26, 26. A moving device 40 consisting of a rectangular parallelepiped air slide cylinder is attached to the underside of the beam member 38. A running part 42 that moves together with the piston of the moving device 40 is provided on the underside of the moving device 40. A plate-shaped cutter attachment part 44 is provided on the underside of the running part 42, and a parallelogram cutter 18 that cuts the web W is attached to the cutter attachment part 44. The lower end of the cutter 18 protrudes from the underside of the cutter attachment part 44.

A standby member 48 is attached to one end of the moving device 40. This standby member 48 has a support member 50 extending downward from one end face of the moving device 40, and a standby plate 52 that is bent horizontally inwardly into an L-shaped cross section is attached from the lower end of the support member 50. When the running part 42 is in a standby position before cutting the old web W, the cutter 18 is located above this standby plate 52, and the blade of the cutter 18 is not exposed.

A damper 54 is attached to the underside of the other end of the moving device 40 to determine the position where the running part 42 stops and to cushion the shock when it stops.

A nozzle 56 for blowing air onto the old web W is attached to the running part 42. The nozzle 56 has an outlet 58 disposed behind the cutter 18 in the moving direction of the running part 42, and is located behind the cutter 18 in the moving direction of the web W. The nozzle 56 is a member in which a first pipe section 60, a second pipe section 62, and a third pipe section 64 are continuously provided, and the first pipe section 60 is arranged parallel to the extending direction of the cutter 18 and has an outlet 58 at its lower end, and the blowing direction of the air is perpendicular to the moving direction of the cutter 18 and perpendicular to the moving direction of the old web W at the cutting position. The second pipe section 62 is a member that extends from the upper end of the first pipe section 60 to the front of the running part 42. The third pipe section 64 is a member that extends upward from the front end of the second pipe section 62 that extends forward. The first pipe section 60, the second pipe section 62, and the third pipe section 64 are formed in an approximately S-shape.

One end of a bellows-shaped hose 66 is attached to the upper end of the third tube 64, which is the base of the nozzle 56. This hose 66 is flexible and easy to bend, and because it is bellows-shaped, it can freely expand and contract in the length direction. The other end of this hose 66 is fixed to a base member 68 that is provided above the pair of left and right splice arms 26, 26 and on the rotation shaft 28 side of the pressing roll 24. One end of an air pipe 70 is attached to this base member 68, and a compressor 72 that supplies air is connected to the other end of this air pipe 70. When air is supplied from the compressor 72, it passes through the air pipe 70, base member 68, hose 66, and nozzle 56 and is blown out from the outlet 58.

When the travelling part 42 is moved from one end to the other by the moving device 40, the nozzle 56 moves together with the cutter 18. In this case, the hose 66 is flexible and stretchable, so it can move along the width direction of the web W with the base member 68 as the center.

(3) Electrical Configuration of the Unwinding Device 100 Next, the electrical configuration of the unwinding device 100 will be described with reference to the block diagram of FIG.

The control unit 80, which is made up of a microcomputer, is connected to the main motor 7 that rotates the rotary support shaft 2, the old motor 9 that rotates the old unwinding roll 8, the new motor 11 that rotates the new unwinding roll 10, the air cylinder 74 for the arm of the splice device 20, the moving device 40, the compressor 72, and the air cylinder 36 for the nip.

(4) Operational Process of the Unwinding Device 100 Hereinafter, the splicing process of the unwinding device 100 for the web W will be described with reference to FIGS.

3, in the first step, the control unit 80 rotates the old unwinding roll 8 attached to a pair of left and right old arms 4, 4 arranged horizontally in a counterclockwise direction by the old motor 9 at a rotation speed V, and supplies the old web W from the old unwinding roll 8 to an external device for coating, heating, etc. from a transport roll 5 provided on a frame (not shown). This rotation speed V is controlled by the control unit 80 so as to match the running speed (e.g., 2 to 100 m/min) of the old web W. In addition, a new unwinding roll 10 on which a new web W is fully wound is attached to a pair of left and right new arms 6, 6 arranged horizontally.

(4-2) Second Step As shown in FIG. 4, in the second step, when the old web W wound around the old unwinding roll 8 becomes low and unwinding is nearing completion, the control unit 80 rotates the old arms 4, 4 and the new arms 6, 6 in a clockwise direction around the rotating support shaft 2, and starts to move the positions of the old unwinding roll 8 and the new unwinding roll 10 180° toward opposite positions.

(4-3) Third Step As shown in FIG. 5, in the third step, the control unit 80 rotates the old arms 4, 4 and the new arms 6, 6 in a clockwise direction while continuing to supply the old web W supplied from the old unwinding roll 8 via the auxiliary roll 12 and the transport roll 5.

6, in the fourth step, the control unit 80 rotates the old arms 4, 4 and the new arms 6, 6 in a clockwise direction while rotating the splice arms 26, 26 having the guide roll 16, the pressure roll 24 and the cutter 18 about the rotation shaft 28 to bring them closer to the old web W supplied from the old unwinding roll 8, and the pressure roll 24 presses the old web W downward. In addition, the new motor 11 rotates the new unwinding roll 10 in the counterclockwise direction at a rotation speed V. This fourth step will be described in detail later.

(4-5) Fifth Step As shown in Fig. 7, in the fifth step, the control unit 80 rotates the old arms 4, 4 and the new arms 6, 6 in a clockwise direction, while pressing the running old web W with the guide roll 16, and presses (nips) the old web W against the double-sided adhesive tape 22 of the new web W on the rotating new unwind roll 10 with the pressure roll 24 to splice the old web W and the new web W, and then cuts the old web W with the cutter 18. The cutting time is 1 to 3 seconds. This fifth step will be described in detail later.

8, in the sixth step, the control unit 80 stops the rotation of the old unwinding roll 8 and the new unwinding roll 10 at positions 180° opposite to each other, and continues to supply the new web W from the rotating new unwinding roll 10. In addition, the old unwinding roll 8 is rotated in the reverse direction to wind up all of the old web W remaining on the old unwinding roll 8.

(5) Operational State of the Splice Device 20 Next, the splicing operational state of the splice device 20 in the fourth and fifth steps described above will be described in more detail.

In the fourth step, as shown in FIG. 6, the control unit 80 rotates the splice arm 26 around the rotation axis 28, and while pressing the old web W downward with the pressure roll 24, moves the old web W closer to the outer peripheral surface of the new web W on the new unwind roll 10.

Next, in the fifth step, as shown in Figures 7 and 10, when the double-sided adhesive tape 22 attached to the outer peripheral surface of the new web W wound around the new unwinding roll approaches the position of the pressing roll 24, the control unit 80 operates the pressing roll 24 with the air cylinder 36 to nip the old web W to the double-sided adhesive tape 22 of the new web W. At this time, the old web W runs in a state of being stretched between the pressing roll 24 and the guide roll 16.

Next, as shown in Figs. 10 to 13, the control unit 80 uses the moving device 40 of the cutter driving device 30 to move the cutter 18 of the traveling unit 42 from one end to the other end of the old web W stretched between the pressure roll 24 and the guide roll 16. At the same time, the compressor 72 is used to blow air from the nozzle 56. The nozzle 56 moves together with the cutter 18 while blowing air, and blows the cut end W1 of the old web W cut by the cutter 18 to a position away from the outer circumferential surface of the new web W wound around the new unwinding roll 10. That is, the air blown out from the blowing port 58 of the nozzle 56 blows the old web W from the position cut by the cutter 18 in the direction of the cut ends W1 and W2, as shown in Fig. 10.

As the cutter 18 cuts the old web W, the cut end W1 of the old web W becomes triangular, as shown in FIG. 13. This is because the cutter 18 runs in the width direction while the old web W runs, so the cutting direction becomes oblique. The cut end W1 (W2) of the old web W cut in this way hangs down at a position away from the outer circumferential surface of the new web W wound around the new unwinding roll 10, as shown in FIG. 10. Then, the old unwinding roll 8 is rotated in the reverse direction, and the old web W is completely wound around the old unwinding roll 8.

After cutting of the old web W is completed, the control unit 80 rotates the pair of left and right splice arms 26, 26 in the opposite direction around the rotation axis 28 to return them to the standby position, and also returns the running unit 42, which has the cutter 18 and nozzle 56, from the other end of the moving device 40, which has the damper 54, to the position of the standby member 48 at one end of the moving device 40.

(6) Effect According to this embodiment, the nozzle 56 that blows out air moves together with the cutter 18 to blow out the cut end W1 of the old web W in a direction different from the outer peripheral surface of the new web W wound around the new unwinding roll 10. Therefore, whether the web W is narrow or wide, the air hits the entire cut end W1 from one end to the other in the width direction of the old web, and the cut end W1 (W2) of the old web W does not stick to the outer peripheral surface of the new unwinding roll 10.

In addition, the nozzle 56 has an outlet 58 behind the cutter 18 in the direction of movement of the cutter 18 and behind the old web W in the direction of movement of the old web W, so that the cut end W1 of the old web W immediately after being cut by the cutter 18 can be blown away without touching other parts.

Even if the nozzle 56 moves in the width direction of the old web W, the nozzle 56 is connected to a hose 66 that is connected to a base member 68, so air can always be supplied from the compressor 72. In particular, because the hose 66 is flexible and can expand and contract in the length direction, the hose 66 can move around the base member 68 in accordance with the movement of the nozzle 56.

Example of changes

In the above embodiment, the running part 42 is moved by the moving device 40 consisting of an air slide cylinder, but other moving devices such as a linear actuator device may also be used.

Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and essence of the invention, and are included in the scope of the invention and its equivalents described in the claims.

W: web, W1: cut end, 8: old unwinding roll, 10: new unwinding roll, 18: cutter, 20: splicing device, 22: double-sided adhesive tape, 24: pressure roll, 26: splicing arm, 28: rotating shaft, 30: cutter drive device, 40: moving device, 42: running part, 46: cutter, 56: nozzle, 58: blowing port, 66: hose, 68: base member, 72: compressor, 80: control unit, 100: unwinding device

Claims (5)

In a splice device for a web unwinding device, two unwinding rolls having a web wound thereon are rotatably attached between a pair of left and right arms, and the arms are rotated to replace an old unwinding roll that is nearing the end of unwinding the web with a new unwinding roll on which the web is fully wound, while unwinding the web,
A pair of left and right splice arms rotatable around a rotation axis disposed in the left and right direction ;
a guide roll rotatably provided at the tip of each of the pair of left and right splice arms for guiding the old web from the old unwinding roll to the outside;
a pressing roll rotatably provided on a pair of left and right splice arms between the rotating shaft and the guide roll, the pressing roll pressing the old web, which is guided outward by the guide roll, against an adhesive member provided on the new web wound around the new unwinding roll;
A beam member is installed in the left and right direction in the pair of left and right splice arms between the guide roll and the pressing roll;
a running section provided on the beam member on the side of the old web guided by the guide roll and the pressing roll, the running section having a cutter that runs in the width direction of the old web to cut the old web after connecting the old web and the new web that are guided from the guide roll to the pressing roll;
a nozzle attached to the traveling section, which travels together with the cutter in the width direction of the old web between the guide roll and the pressure roll, and blows air onto a cut end portion of the old web that is guided from the guide roll to the pressure roll, thereby blowing the cut end portion off to a position away from an outer circumferential surface of the new web wound around the new unwind roll;
having
One end of a flexible and stretchable hose is attached to the base of the nozzle;
a base member is provided at a center portion in a width direction of the web, the base member being provided above the pair of left and right splice arms when the pressure roll is pressing the old web, and closer to the rotary shaft than the pressure roll in a direction in which the splice arms extend from the rotary shaft ;
The other end of the hose is connected to the base member,
The base member is connected to a supply means for supplying air through an air pipe,
The one end of the hose moves along the width direction of the web around the base member.
A splicing device for a web unwinding device. the nozzle is provided behind the cutter with respect to the moving direction of the traveling part, and blows air onto the cut end of the old web cut by the cutter.
2. The splicing device of claim 1. the nozzle is provided behind the cutter with respect to the moving direction of the old web, and blows air onto the cut end of the old web cut by the cutter;
2. The splicing device of claim 1. the air blowing direction of the nozzle is perpendicular to the moving direction of the cutter and perpendicular to the moving direction of the old web at the cutting position;
2. The splicing device of claim 1. the air blowing direction of the nozzle is perpendicular to the moving direction of the cutter and perpendicular to the old web at the cutting position;
2. The splicing device of claim 1.

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