JP2015174769A - Transport apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transport apparatus capable of absorbing a change in pass line length.SOLUTION: The transport apparatus comprises: a guide roll group 56 formed from a plurality of guide rolls 18-24 which constitute a pass line of a web W to be transported on a transport path at a predetermined transport speed; a main movement unit 36 for moving the guide roll group 56 integrally in a main movement direction at a moving speed; a first fixed roll 42 over which the web W on the transport path is trained; a movable roll 40 over which the web W passed the first fixed roll 42 is trained; a second fixed roll 38 over which the web W having passed through the movable roll 40 is trained; an adjustment movement unit 36 for moving the movable roll 40 in an adjustment movement direction in synchronization with the change in the pass line length arising from the movement of the guide roll group 56 and in synchronization with the moving speed. Both conveying direction of the web W trained from the first fixed roll 42 to the movable roll 40 and the conveying direction of the web W trained from the movable roll 40 to the second fixed roll are parallel to the main movement direction.

Description

  The present invention relates to a transport device for transporting a long web.

  Conventionally, when the coating apparatus applies a coating liquid to the web, when the seam between the webs comes to the coating position, in order to avoid the seam, a guide roll that transports the web is used. The web is moved away from the coating apparatus once, and when the seam passes, the web is brought closer to the coating apparatus again. Thus, when the web pass line is changed, the tension on the web changes.

  For this reason, a tension fluctuation preventing device for preventing the tension applied to the web from changing has been proposed. In this tension fluctuation prevention device, three rolls are arranged in a three-leaf shape to prevent the tension fluctuation having a magnitude larger than a set value generated downstream in the web transport process from going upstream. Of the three rolls, two are fixed rolls, and the remaining one is a moving roll that moves up and down between the two fixed rolls in response to a change in the web tension. When the tension fluctuation occurs, the moving roll nips the web that travels in contact with the two fixed rolls (see, for example, Patent Document 1).

JP 2010-254425 A

  However, when the tension fluctuation preventing apparatus as described above is used, fluctuations in tension can be prevented, but adjustment of changes in the pass line length of the web W may not be performed successfully. If this adjustment is not successful, there is a problem that the web is scratched, the web travel is not stable, and the entire system is stopped.

  In view of the above problems, an object of the present invention is to provide a transport apparatus that can absorb changes in the length of a pass line.

  The present invention provides a guide roll group formed of a plurality of guide rolls constituting a web pass line that is transported along a transport path at a predetermined transport speed, and the guide roll group at a predetermined travel speed in the main movement direction. A main moving means for moving integrally; a first fixed roll on which the web in the transport path is stretched; a movable roll on which the web that has passed through the first fixed roll is spanned; and the movable roll The second fixed roll over which the passed web is stretched, and the adjustment movement means for moving the movement roll in the adjustment movement direction in synchronization with the change in the pass line length accompanying the movement of the guide roll group and the movement speed. And the conveyance direction of the web spanned from the first fixed roll to the movable roll and the conveyance direction of the web spanned from the movable roll to the second fixed roll are both Serial is parallel to the main movement direction, a conveying device.

  According to the present invention, it is possible to absorb a change in the pass line length due to the movement of the guide roll group.

It is explanatory drawing of the conveying apparatus which shows one Embodiment of this invention. It is explanatory drawing of a coating apparatus. It is a block diagram of a conveying apparatus. It is a graph which shows the time change of the conveyance speed V of a web, and the reference movement speed v of an adjustment moving part and a main moving part. It is a graph which shows the time change length of the pass line length accompanying the movement of a guide roll group and a movement roll.

  Hereinafter, a conveying apparatus according to an embodiment of the present invention will be described with reference to FIGS. The conveying apparatus 10 of this embodiment applies a coating liquid to one side of the web W by the coating apparatus 1, and the web W is, for example, a film, a metal foil, or a cloth.

(1) Configuration of Conveying Device 10 The configuration of the conveying device 10 will be described with reference to FIG.

  A first carry-in roll 46 and a second carry-in roll 44 for carrying the web W into the apparatus main body 12 are provided on the upper right side of the apparatus main body 12 of the transport apparatus 10. A roll 42 is provided, a moving roll 40 is provided immediately below the first fixed roll 42, and a second fixed roll 38 is provided directly above the moving roll 40. The second carry-in roll 44 is a drive roll that is rotated by a motor, and conveys the web W. The first fixed roll 42 and the second fixed roll 38 have the same height, and the moving roll 40 moves between the first fixed roll 42 and the second fixed roll 38 in the vertical direction. In this case, in order to move the moving roll 40, the moving roll 40 is rotatably attached to the adjustment attachment portion 50, and the adjustment attachment portion 50 can be moved up and down by an adjustment movement portion 52 formed of an electric actuator. Moreover, the conveyance direction (vertical direction) of the web W conveyed from the 1st fixed roll 42 to the movement roll 40, and the conveyance direction (vertical direction) of the web W conveyed from the movement roll 40 to the 2nd fixed roll 38 are included. The movement direction (vertical direction) of the moving roll 40 is parallel to the conveyance direction (vertical direction). The first fixed roll 42 and the second fixed roll 38 may be provided at different heights.

  A first guide roll 28 is provided diagonally to the left of the second fixed roll 38, and a second guide roll 26 is provided below the first guide roll 28. A third guide roll 24 is provided directly below the second guide roll 26, and a fourth guide roll 22 and a fifth guide roll 20 are provided in a horizontal state slightly diagonally to the left of the third guide roll 24. A sixth guide roll 18 is provided obliquely above and to the left of the fifth guide roll 20. A seventh guide roll 16 and an eighth guide roll 14 are provided directly above the sixth guide roll 18 to guide the web W to the carry-out roll 2 provided outside the apparatus main body 12. The web W that has reached the carry-out roll 2 is carried into a drying device (not shown).

  The third guide roll 24, the fourth guide roll 22, the fifth guide roll 20, and the sixth guide roll 18 are integrally fixed to the main mounting portion 30 so as to be rotatable so that their positions do not change, and a guide roll group. 56 is configured. The main attachment portion 30 is provided to be movable up and down by an electric actuator 32 and an electric actuator 34 provided on both sides of the main attachment portion 30, and the third guide roll 24 to the sixth guide roll 18 are moved by the main attachment portion 30 moving up and down. The guide roll group 56 is moved up and down integrally. The electric actuator 32 and the electric actuator 34 are collectively referred to as a main moving unit 36.

  The coating device 1 is provided between the fourth guide roll 22 and the fifth guide roll 22. The coating apparatus 1 will be described in detail later.

  A seam sensor 6 is provided on the carry-in side of the apparatus main body 12, and the seam sensor 6 is provided on the conveyance path of the web W as shown in FIG. 1, and outputs a seam signal when the web W and the seam of the web W are detected. .

  For example, a servo motor or a servo cylinder is used as the electric actuator in the adjustment moving unit 52 and the main moving unit 36.

  A tension measuring device 48 is provided on the second fixed roll 38 and measures the tension of the web W from the force with which the web W presses the second fixed roll 38 downward.

(2) Coating device 1
The coating apparatus 1 is demonstrated based on FIG. The coating apparatus 1 is a reverse coater system, and is provided below the horizontal web W stretched over the fourth guide roll 22 and the fifth guide roll 20, and a liquid reservoir 4 provided inside the die 7. The reverse reservoir 3 is rotatably provided at the upper end of the liquid reservoir 4.

  The coating apparatus 1 applies the coating liquid stored in the liquid reservoir 4 to the lower surface of the web W by rotating the reverse roll 3 in the direction opposite to the conveyance direction of the web W.

(3) Electrical configuration of transport device 10 Next, an electrical configuration of the transport device 10 will be described with reference to FIG.

  The control unit 54 of the transport apparatus 10 is connected to the electric actuator that constitutes the adjustment movement unit 52, and the electric actuator 32 and the electric actuator 34 that constitute the main movement unit 36. The controller 54 is connected to a drive motor 5 that transports the web W at a transport speed V, a joint sensor 6, and a tension measuring device 48.

  When the seam signal is input from the seam sensor 6, the controller 54 passes the length of the pass line from the position of the seam sensor 6 to the coating apparatus 1 (hereinafter referred to as “pass line length”) and the conveyance speed V of the web W. From the above, the timing at which the seam of the web W passes through the coating apparatus 1 is calculated, and a jumping operation is performed to move the adjustment mounting portion 30 upward in accordance with the passage timing so that the seam is not caught on the coating apparatus 1. To. The distance moved upward by this jumping operation is set to a minimum dimension that does not catch the seam in order to reduce the loss of the web W. The “pass line” of the web W means a trajectory of the transport path of the web W transported by the transport device 10.

(4) Operation State of Conveying Device 10 The operation state of the conveying device 10 will be described with reference to FIG.

  First, the web W is carried into the apparatus main body 12 by the first carry-in roll 46 and the second carry-in roll 44, and then reaches the first fixed roll 42.

  Next, after the web W is stretched over the first fixed roll 42, the web W moves right below and is stretched over the movable roll 40.

  Next, after the web W is passed over the moving roll 40, the direction is changed upward, and the web W is conveyed right above to reach the second fixed roll 38.

  Next, the web W stretched around the second fixed roll 38 is guided obliquely downward to the left and reaches the third guide roll 28 and the fourth guide roll 26.

  Next, the tension measuring device 48 measures the tension of the web W by the force of the web W when it is passed over the second fixed roll 38.

  Next, the web W that has passed through the second guide roll 26 moves right below, is stretched over the third guide roll 24, is transported slightly downward, and is turned in the horizontal direction by the fourth guide roll 22.

  Next, when the web W is being transported horizontally between the fourth guide roll 22 and the fifth guide roll 20, the coating apparatus 1 coats the lower surface of the web W with the coating liquid.

  Next, the web W coated with the lower surface is turned directly upward by the sixth guide roll 18.

  Next, the web W moving right above reaches the carry-out roll 2 outside the apparatus main body 12 through the second guide roll 26 and the first guide roll 28. Thereby, the web W coated on the outside of the conveying apparatus 10 is carried out.

(5) Description of Jumping Operation When the coating apparatus 1 coats the coating liquid on the lower surface of the web W, the main moving unit 36 moves down the guide roll group 56 integrated with the main mounting unit 30 downward. The web W is brought into contact with the reverse roll 3 of the coating apparatus 1. As a result, the reverse roll 3 is applied to the lower surface of the web W (the state indicated by the solid line in FIG. 1).

  When the control unit 54 performs a jumping operation to move the main attachment unit 30 upward (that is, the main movement direction) in order to prevent the seam from being caught in the coating apparatus 1 during the coating, Since the guide roll group 56 including the sixth guide roll 24 moves upward from the guide roll 18 and the pass line length of the web W is shortened by L, the web W is in a slack state. Therefore, the control unit 54 moves the moving roll 40 attached to the adjustment mounting unit 50 using the adjustment moving unit 52 by the change length L that shortens the pass line length accompanying the upward movement of the guide roll group 56. The length of the pass line (hereinafter referred to as “adjustment pass line”) that is moved downward (that is, the adjustment moving direction) and reaches the first fixed roll 42, the moving roll 40, and the second fixed roll 38 is changed by a change length L. The change length L of the pass line length of the guide roll group 56 is absorbed (the state of the dotted line in FIG. 1).

  At this time, the control unit 54 synchronizes the change and movement speed of the pass line length accompanying the movement of the guide roll group 56 and the change and movement speed of the pass line length accompanying the movement of the movement roll 40. As shown in FIG. 4, when moving the guide roll group 56, the control unit 54 gradually increases the moving speed from the start of movement, and when it reaches a predetermined reference moving speed v, thereafter maintains the reference moving speed v. Then slow down again and stop. The reference moving speed v is made slower than the conveyance speed V of the web W.

  The controller 54 similarly accelerates the moving speed of the moving roll 40 in a state where the guide roll group 56 is moved as described above, and the moving speed of the second moving roll 40 reaches the reference moving speed v. Thereafter, the reference moving speed v is maintained, and the vehicle is again decelerated and stopped.

  The reason why the reference moving speed v is slower than the transport speed V is to prevent the moving guide roll group 56 and the moving roll 40 from pulling the web W being transported, thereby preventing an extra tension. is there.

  The following points are important here. As shown by the solid line in FIG. 5, when the guide roll group 56 is moved upward except for the portion to be accelerated / decelerated, the bus line length is reduced in proportion to the movement. On the other hand, the conveyance direction of the web W conveyed from the first fixed roll 42 to the movable roll 40 is parallel to the conveyance direction of the web W conveyed from the movable roll 40 to the second fixed roll 38, and the movable roll 40. The moving direction is parallel to the conveying direction. As a result, as indicated by the dotted line in FIG. 5, the bus line length is increased in proportion to the movement of the moving roll 40 except for the portion to be accelerated / decelerated. Therefore, as shown in FIG. 5, the adjustment path line length is increased in proportion to the movement of the moving roll 40 as the bus line length is decreased in proportion to the movement of the guide roll group 56 (see the solid line). Since the minute (see the dotted line) is the same, and the acceleration / deceleration of the moving speed is performed in the same manner, the path line length does not change at the start of movement, at the end of movement, and during the movement. Therefore, the change length L of the pass line length can be absorbed, and the tension of the web W does not change and can be pulled with a constant tension.

  Further, when the tension measured by the tension measuring device 48 changes due to some disturbance, the control unit 54 changes the moving condition of the moving roll 40 so as to absorb the fluctuation. That is, when the tension becomes strong, the moving speed of the moving roll 40 is made slower than the reference moving speed v. Conversely, when the tension becomes weak, the moving speed of the moving roll 40 is made faster than the reference moving speed v. To do. Note that the upper limit value and the lower limit value of the fluctuation are set in advance for the fluctuation of the tension, and the control unit 54 performs feedback control so that the fluctuation is within the allowable range.

(6) Effect According to the present embodiment, even if a jumping operation is performed on the guide roll group 56 in order to avoid the seam of the web W, the change in the pass line length can be absorbed. Since there is no change, the running of the web W can be stabilized. Therefore, the line stop and the web W can be prevented from being damaged, and the product loss can be reduced.

  Further, since the main attachment portion 30 is moved by the electric actuators 32 and 34, the jumping operation can be performed in a short time. Further, since the speed of the jumping operation can be increased, the uncoated portion of the web W is reduced and the product loss is reduced.

(7) Modification Example In the above embodiment, the moving direction of the moving roll 40 is the vertical direction, but the moving direction is not limited to this and may be an oblique direction. Also in this case, the conveying direction of the first fixed roll 42 and the moving roll 40 is parallel to the conveying direction of the moving roll 40 and the second fixed roll 38, and the moving direction of the moving roll 40 is parallel to these conveying directions. I just need it.

  Moreover, in the said embodiment, although the guide roll group 56 was jumped in order to avoid a joint in the coating device 1, not only this but the guide roll group 56 is moved upwards in order to maintain the coating device 1. When moving, the same operation as described above is performed.

  Moreover, in the said embodiment, although the reverse coater type coating apparatus was used as the coating apparatus 1, the coating apparatus with which a coating roll rotates in the same direction as the conveyance direction of the web W, and the coating apparatus of other systems May be used.

  Moreover, in the said embodiment, although the coating apparatus 1 was provided in the conveying apparatus 10, you may provide apparatuses other than this.

  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, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Coating apparatus, 10 ... Conveyance apparatus, 12 ... Apparatus main body, 18 ... 6th guide roll, 20 ... 5th guide roll, 22 ... 4th guide roll, 24 ... 3rd guide roll, 30 ... Main attachment part, 36 ... Main movement part, 38 ... 2nd fixed roll, 40 ... Movement roll, 42 ... 1st fixed roll, 48 ... Tension measuring device, 50 ... Adjustment attachment part, 52 ... Adjustment movement part, 54 ... Control part

Claims (7)

A guide roll group formed of a plurality of guide rolls constituting a web pass line that is transported through a transport path at a predetermined transport speed;
Main moving means for moving the guide roll group integrally at a predetermined moving speed in the main moving direction;
A first fixed roll over which the web in the transport path is stretched;
A moving roll over which the web that has passed through the first fixed roll;
A second fixed roll on which the web that has passed the moving roll is stretched;
Adjustment movement means for moving the movement roll in the adjustment movement direction in synchronization with the change in the pass line length accompanying the movement of the guide roll group and the movement speed;
Have
The web conveyance direction spanned from the first fixed roll to the moving roll and the web conveyance direction spanned from the moving roll to the second fixed roll are both parallel to the main movement direction. ,
Conveying device. The adjustment moving means includes a change in the bus line length in the guide roll group by the main moving means, and a change in the bus line length from the first fixed roll to the second fixed roll through the moving roll. Move the moving roll so that the same
The transport apparatus according to claim 1. The moving speed of the adjustment moving means and the moving speed of the main moving means are the same reference moving speed.
The transport apparatus according to claim 2. The moving speed of the adjusting moving means and the moving speed of the main moving means are slower than the conveying speed;
The transport apparatus according to claim 3. Tension measuring means for measuring the tension of the web;
The adjustment moving means performs feedback control for moving the moving roll so that the tension measured by the tension measuring means does not change.
The transport apparatus according to claim 4. The main movement direction and the adjustment movement direction are parallel.
The transport apparatus according to claim 5. A coating device for coating a coating liquid on the web conveyed to the guide roll group is provided;
The transport apparatus according to claim 6.

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