JP2016155678A - Adsorption conveyance device and adsorption conveyance method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adsorption conveyance device and an adsorption conveyance method capable of suppressing the occurrence of an abnormality such as wrinkles in a web at the time when the web is adsorbed to a conveyance part by an adsorption part.SOLUTION: An adsorption conveyance device 20 for conveying a belt-like web W comprises a conveyance part 22 which conveys the web W and an adsorption part 24 which adsorbs the web W to the conveyance part 22. As heading toward the downstream side in the conveyance direction of the web W, an adsorption region by the adsorption part 24 in the width direction of the web W expands.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a suction transport device for transporting a belt-shaped web and a suction transport method using such a suction transport device.

  In a roll-to-roll type production facility, as a transport device for transporting a strip-shaped web unwound from an unwind roll, a web transporting web is conveyed by the transport belt while adsorbing the web to the transport belt by a suction portion. Conventionally known. For example, Patent Document 1 discloses a perforated steel belt having a plurality of through holes for transporting a transported body, and a back side of the perforated steel belt, which extends along a transport path of the transported body. And a conveying device including a housing-like suction body that sucks the conveyed body through the perforated steel belt, and a sheet-like fibrous sheet having air permeability interposed between the conveyed body and the suction body. It is disclosed. In such a transport device, a porous plate having air permeability is disposed on the upper surface of the suction body at a predetermined interval from the perforated steel belt, and an air chamber is formed in the lower portion thereof, and the wall surface of the suction body and / or Alternatively, the air in the air chamber is forcibly exhausted to the outside through a suction pipe penetrating the bottom surface.

Patent No. 5286461

  However, in the conventional transport apparatus disclosed in Patent Document 1, when a belt-shaped web is transported as a transported body, the entire area in the width direction of the web is attracted to the transport belt at a time by the suction portion. For this reason, when the web is attracted to the transport belt, there is a possibility that an abnormality such as a wrinkle may occur in the web according to a pattern pattern printed on the web.

  The present invention has been made in consideration of the above points, and is capable of suppressing the occurrence of an abnormality such as wrinkles on the web when the web is attracted to the transport unit by the suction unit. It is another object of the present invention to provide a suction conveyance method.

  The suction conveyance device of the present invention is a suction conveyance device for conveying a strip-shaped web, and includes a conveyance unit for conveying the web, and an adsorption unit for adsorbing the web to the conveyance unit. And a suction region by the suction portion in the width direction of the web is widened toward the downstream side in the web conveyance direction.

  According to such a suction conveyance device, since the suction region by the suction portion in the width direction of the web is widened toward the downstream side in the web transport direction, the entire region in the width direction of the web is simultaneously transferred to the transport belt by the suction portion. Compared with the case of adsorbing, when the web is adsorbed to the transport unit by the adsorbing unit, it is possible to suppress the occurrence of abnormalities such as wrinkles on the web.

  The suction conveyance device of the present invention further includes a regulation unit that regulates a range of the adsorption region by the adsorption unit so that the adsorption region by the adsorption unit in the width direction of the web is expanded toward the downstream side in the web conveyance direction. It may be.

  In this case, the suction area by the suction part regulated by the regulation part may spread outward from the center position in the width direction of the web as it goes downstream in the web conveyance direction.

  Further, the suction region by the suction part regulated by the regulation part may have a sharp upstream end in the web conveyance direction.

  Further, a porous plate may be provided between the web and the adsorption portion, and the restriction portion may be provided on the front surface or the back surface of the porous plate.

  Further, the restricting portion may include a film.

  Moreover, the said control part may be provided between the said conveyance part and the said web.

  In this case, the restricting portion may be formed of a plate-like member provided in a fixed position.

  In the suction conveyance device of the present invention, the suction portion may be formed in such a shape that the suction region in the width direction of the web expands toward the downstream side in the web conveyance direction.

  Alternatively, the suction section is divided into a plurality of air chambers, and suction is performed in each of the air chambers so that the suction area by the suction section in the width direction of the web is expanded toward the downstream side in the web conveyance direction. The setting of whether or not to perform may be performed for each air chamber.

  In the suction conveyance device of the present invention, the conveyance unit may include a belt, and the adsorption unit may adsorb the web to the belt.

  In this case, the belt may have a plurality of through holes, and the suction portion may be provided on the opposite side of the belt from the web side.

  The suction conveyance method of the present invention is a suction conveyance method for conveying a strip-shaped web, the step of adsorbing the web to a conveyance unit by an adsorption unit, and the web adsorbed by the conveyance unit in the conveyance unit And a step of transporting the suction portion, wherein a suction region by the suction portion in the width direction of the web is widened toward the downstream side in the transport direction of the web.

  According to such a suction conveyance method, since the suction region by the suction portion in the width direction of the web is expanded toward the downstream side in the web transport direction, the entire region in the width direction of the web is simultaneously transferred to the transport belt by the suction portion. Compared with the case of adsorbing, when the web is adsorbed to the transport unit by the adsorbing unit, it is possible to suppress the occurrence of abnormalities such as wrinkles on the web.

  According to the suction conveyance device and the suction conveyance method of the present invention, when the web is adsorbed to the conveyance unit by the adsorption unit, it is possible to suppress occurrence of abnormality such as wrinkles on the web.

It is a schematic block diagram which shows the outline of a structure of the processing system provided with the adsorption conveyance apparatus by embodiment of this invention. It is a block diagram which shows an example of a structure of the adsorption conveyance apparatus in the processing system shown in FIG. It is a figure which shows an example of a structure of the film affixed on the back surface of the porous board in the adsorption conveyance apparatus shown in FIG. It is a figure which shows the other example of a structure of the film affixed on the back surface of the porous board in the adsorption conveyance apparatus shown in FIG. It is a figure which shows the further another example of a structure of the film affixed on the back surface of the porous board in the adsorption conveyance apparatus shown in FIG. It is a figure which shows the further another example of a structure of the film affixed on the back surface of the porous board in the adsorption conveyance apparatus shown in FIG. It is a block diagram which shows the other example of a structure of the adsorption conveyance apparatus in the processing system shown in FIG. It is a figure which shows the structure of the metal plate provided between the web and the belt of a conveyance part in the adsorption conveyance apparatus shown in FIG. It is a figure which shows the shape of the adsorption | suction part in the adsorption conveyance apparatus which concerns on a modification. It is a figure which shows the shape of the adsorption | suction part in the adsorption conveyance apparatus which concerns on another modification. It is a perspective view which shows the structure of the three-way valve provided in the adsorption conveyance apparatus shown in FIG. It is a figure which shows the internal structure of the three-way valve shown in FIG. It is a flowchart which shows the processing method of the web by the processing system shown in FIG. It is a schematic block diagram which shows the outline of a structure of the processing system which concerns on a modification.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 13 are views showing a suction conveyance device according to the present embodiment and a processing system provided with such a suction conveyance device. Among these, FIG. 1 is a schematic configuration diagram showing an outline of a configuration of a processing system including the suction conveyance device according to the present embodiment, and FIG. 2 is an example of a configuration of the suction conveyance device in the processing system shown in FIG. FIG. 3 to 6 are diagrams showing various examples of the configuration of the film attached to the back surface of the porous plate in the suction conveyance device shown in FIG. FIG. 7 is a configuration diagram showing another example of the configuration of the suction conveyance device in the processing system shown in FIG. 1, and FIG. 8 is a diagram between the web and the belt of the conveyance unit in the suction conveyance device shown in FIG. It is a figure which shows the structure of the metal plate provided in. FIG. 9 and FIG. 10 are diagrams showing various shapes of the suction unit in the suction conveyance device according to the modification. 11 is a perspective view showing a configuration of a three-way valve provided in the suction conveyance device shown in FIG. 2, and FIG. 12 is a diagram showing an internal configuration of the three-way valve shown in FIG. FIG. 13 is a flowchart showing a web processing method by the processing system shown in FIG.

  The processing system 10 according to the present embodiment performs various processing processes such as printing, coater processing, and drying on a belt-like web W that is continuously conveyed. As shown in FIG. 1, a processing system 10 according to this embodiment includes an unwinding roll 12 for unwinding a strip-shaped web W and a nip roll 14 for adjusting the tension of the web W unwound from the unwinding roll 12. Nip rolls 16 and 18 for conveying the web W unwound from the unwinding roll 12, and a processing apparatus 40 for performing processing such as printing on the web W unwound from the unwinding roll 12. And a suction conveyance device 20 for conveying the web W processed by the processing device 40. Details of each component of the processing system 10 will be described below.

  As shown in FIG. 1, a pair of nip rolls 14 are provided on the upstream side of the processing apparatus 40 in the conveyance direction of the web W (indicated by arrows in FIG. 1) so as to face each other. Here, the outer peripheral surface of each nip roll 14 is made of an elastic member such as rubber, and the web W is interposed between the nip rolls 14 while the pair of nip rolls 14 are rotating while facing each other. By being sent, the web W is conveyed by a pair of nip rolls 14. Further, the tension of the web W unwound from the unwinding roll 12 is adjusted by adjusting the rotation speed of the nip roll 14.

  A pair of nip rolls 16 are provided on the downstream side of the processing apparatus 40 in the conveyance direction of the web W and the upstream side of the suction conveyance apparatus 20 so as to face each other. Here, the outer peripheral surface of each nip roll 16 is made of an elastic member such as rubber, and the web W is interposed between the nip rolls 16 in a state where the pair of nip rolls 16 are rotating while facing each other. The web W is conveyed by the pair of nip rolls 16 by being fed. Further, one nip roll 16 (specifically, the upper nip roll 16 in FIG. 1) of the pair of nip rolls 16 is separated from the other nip roll 16 (specifically, the lower nip roll 16 in FIG. 1). It can be moved upward in FIG. Here, when one nip roll 16 moves away from the other nip roll 16, the web W is not conveyed by these nip rolls 16. In the processing system 10 according to the present embodiment, the web W unwound from the unwinding roll 12 before the processing is performed on the web W by the processing apparatus 40 is conveyed by the pair of nip rolls 16, while the processing is performed. During processing of the web W by the processing device 40, the upper nip roll 16 in FIG. 1 moves upward in FIG. 1 so as to be separated from the lower nip roll 16, thereby causing the pair of nip rolls 16 to move the web W. Is not carried.

  Further, a pair of nip rolls 18 are provided on the further downstream side of the suction conveyance device 20 in the conveyance direction of the web W so as to face each other. Here, the outer peripheral surface of each nip roll 18 is made of an elastic member such as rubber, and the web W is interposed between the nip rolls 18 while the pair of nip rolls 18 are rotating while facing each other. The web W is conveyed by the pair of nip rolls 18 by being fed. Also, one nip roll 18 (specifically, the upper nip roll 18 in FIG. 1) of the pair of nip rolls 18 is separated from the other nip roll 18 (specifically, the lower nip roll 18 in FIG. 1). It can be moved upward in FIG. When one nip roll 18 moves away from the other nip roll 18, the web W is not conveyed by these nip rolls 18. In the processing system 10 according to this embodiment, the web W is transported by the pair of nip rolls 18 when the web W unwound from the unwinding roll 12 before the processing is performed on the web W by the processing apparatus 40. On the other hand, while the processing device 40 is processing the web W, the upper nip roll 18 in FIG. 1 moves upward in FIG. 1 so as to be separated from the lower nip roll 18. Accordingly, the web W is not conveyed by the pair of nip rolls 18.

  As shown in FIG. 2, the suction conveyance device 20 includes a conveyance unit 22 composed of a conveyor or the like for conveying the belt-like web W, and an adsorption unit 24 for adsorbing the web W conveyed by the conveyance unit 22. Have. Here, the transport unit 22 has an endless (that is, a circulation shape) belt 22b such as a steel belt that is stretched around a plurality of (two in the example shown in FIG. 2) pulleys 22a. When one pulley 22a among the plurality of pulleys 22a is rotationally driven by the drive motor that does not, the belt 22b circulates in the counterclockwise direction in FIG. The belt 22b is formed with a large number of through holes having a diameter of 0.5 mm, for example. Further, the adsorbing part 24 is provided on the back side of the belt 22b facing the web W, and adsorbs the web W to the belt 22b through a through hole provided in the belt 22b. More specifically, the adsorbing unit 24 is formed of a box-like shape provided with an air chamber inside, for example, and is provided on the ceiling surface of the adsorbing unit 24 (specifically, the surface facing the belt 22b of the conveying unit 22). For example, a plurality of through holes having a diameter of several centimeters are formed uniformly. One end of a suction pipe 32 such as a suction hose is connected to the bottom surface of the suction portion 24, and a three-way valve 34 is connected to the other end of the suction pipe 32. In addition, one end of a suction pipe 36 such as a suction hose is connected to the three-way valve 34, and a suction mechanism 38 such as a blower is connected to the other end of the suction pipe 36. When air is sucked from the suction portion 24 through the suction pipe 32, the three-way valve 34, and the suction pipe 36 by the suction mechanism 38, the web W is adsorbed to the belt 22b. The belt 22b is transported in the left direction in FIG. 2 while being adsorbed by the belt 22b. One end of a suction pipe 33 is also connected to the three-way valve 34, and the other end of the suction pipe 33 is open to the atmosphere. Details of the configuration of the three-way valve 34 and the suction pipes 32, 33, and 36 will be described with reference to FIGS.

  As shown in FIG. 11, the three-way valve 34 is provided with three openings 34c, and the ends of the suction pipes 32, 33, and 36 are connected to the openings 34c, respectively. Further, the three-way valve 34 is provided with a valve body 34a that is rotatable about a shaft 34b. When the valve body 34a is at the position indicated by a solid line in FIG. As a result, air is sucked from the suction portion 24 through the suction pipe 32, the three-way valve 34 and the suction pipe 36. On the other hand, when the valve body 34a rotates from the solid line position in FIG. 12 and moves to the two-dot chain line position about the shaft 34b, the suction pipe 32 and the suction pipe 33 come into communication. Here, since the other end of the suction pipe 33 is opened to the atmosphere, the air in the suction portion 24 is also released to the atmosphere, so that the suction of the web W to the belt 22b by the suction portion 24 is stopped.

  Further, in the present embodiment, as shown in FIG. 2, a porous plate 26 made of a thin metal plate or the like is provided on the surface of the suction portion 24 facing the web W. As shown in FIGS. 3 to 6, a plurality of through holes 26 a having a diameter of, for example, 10 μm are formed uniformly in the porous plate 26, and the web W is sucked by the suction portion 24. At this time, the air in the vicinity of the web W conveyed by the belt 22b of the conveyance unit 22 is sucked by the adsorption unit 24 through the through holes 26a of the porous plate 26, whereby the web W is adsorbed by the belt 22b. It is like that.

  As shown in FIG. 2, the transport unit 22 is placed on a mounting table 28. Further, the mounting table 28 is provided with a shift unit 30 for shifting the position of the belt 22b in the transport unit 22 along the width direction of the web W (that is, the direction orthogonal to the paper surface in FIG. 2). By such a shift unit 30, the belt 22 b in the transport unit 22 can move along a direction orthogonal to the paper surface in FIG. 2.

  Further, in the suction conveyance device 20, a web detection unit 39 for detecting an abnormality of the web W after being conveyed by the conveyance unit 22 is located near the downstream end of the conveyance unit 22 in the conveyance direction of the web W. Is provided. Specifically, the web detection unit 39 is composed of a laser displacement meter, for example, and the web W after being transported by the transport unit 22 has a web wrinkle, slack, breakage, or other abnormality. The detection unit 39 detects such wrinkles, slack, breakage, etc. of the web W.

  Further, the processing system 10 of the present embodiment is provided with a control unit 50 that controls each component of the processing system 10, and the control unit 50 controls each component of the processing system 10. Thus, processing is performed on the web W in the processing system 10. In addition, detection information of the web W by the web detection unit 39 is sent to the control unit 50.

  Moreover, in this Embodiment, in the adsorption | suction conveyance apparatus 20, by sticking a film on the back surface of the porous board 26 (namely, by providing a film between the porous board 26 and the adsorption | suction part 24), The suction region in the width direction of the web W is expanded toward the downstream side in the conveyance direction of the web W. Specifically, the through holes 26a provided evenly in the porous plate 26 are closed with a film, so that the range of the adsorption region of the web W in the porous plate 26 is regulated. Various examples of films attached to the back surface of the porous plate 26 will be described with reference to FIGS. 3 to 6, the conveyance direction of the web W is indicated by an arrow. Also, the vertical direction in FIGS. 3 to 6 is the width direction of the web W.

  In the example shown in FIG. 3, two right-angled triangular films 60 are attached in the vicinity of the upstream edge of the back surface of the porous plate 26 in the web W conveyance direction. Here, the region other than the region where each film 60 is adhered on the porous plate 26 (that is, the region where the through hole 26a is not blocked by each film 60) is the adsorption region of the web W. FIG. As shown, the suction area of the web W has a sharp end on the upstream side in the conveyance direction of the web W, and the adsorption area in the width direction of the web W gradually increases toward the downstream side in the conveyance direction of the web W. To spread. As a result, the web W transported by the transport unit 22 in the suction transport device 20 moves from the central position in the width direction to the outside as the region attracted by the suction unit 24 moves to the downstream side (that is, the left side in FIG. 3). The width gradually increases toward the end, and finally, the entire width direction of the web W is sucked by the suction portion 24. As described above, since the region sucked by the suction unit 24 gradually increases from the central position toward the outside as the web W moves downstream, the web W transported by the transport unit 22 Generation of wrinkles on the web W is suppressed. That is, if such a film 60 is not provided and the entire width direction of the web W is sucked by the suction portion 24 at a time, the web W is wrinkled according to the pattern pattern of the web W. However, in the present embodiment, the region where the web W is adsorbed by the adsorbing portion 24 is gradually expanded from the center position in the width direction to suppress the occurrence of wrinkles on the web W. Will come to be.

  In addition, in order to suppress generation | occurrence | production of a wrinkle in the web W, the film stuck on the back surface of the porous board 26 is not limited to the thing as shown in FIG. If the adsorption area in the width direction of the web W can be expanded toward the downstream side in the conveyance direction of the web W, the shape of the film attached to the porous plate 26 can be changed to various ones. Can do.

  For example, a pair of films 62 as shown in FIG. 4 may be used as a film attached to the back surface of the porous plate 26. When each film 62 as shown in FIG. 4 is stuck on the porous plate 26, the region other than the region where the film 62 is stuck on the porous plate 26 (that is, the through hole 26 a is formed by each film 62. The area that is not blocked) is the adsorption area of the web W. As shown in FIG. 4, the adsorption area of such a web W has a narrow upstream end in the conveyance direction of the web W. The suction region in the width direction of the web W gradually expands toward the downstream side in the conveyance direction of the web W. As a result, the web W transported by the transport unit 22 in the suction transport device 20 moves from the central position in the width direction to the outside as the region attracted by the suction unit 24 moves to the downstream side (that is, the left side in FIG. 4). The width gradually increases toward the end, and finally, the entire width direction of the web W is sucked by the suction portion 24. In this way, even when a pair of films 62 as shown in FIG. 4 are attached to the back surface of the porous plate 26, the web W transported by the transport unit 22 is adsorbed as the web W moves downstream. Since the region attracted by the portion 24 gradually increases from the center position toward the outside, the occurrence of wrinkles on the web W is suppressed.

  Moreover, as a film stuck on the back surface of the porous plate 26, a pair of films 64 as shown in FIG. 5 may be used. When each film 64 as shown in FIG. 5 is stuck on the porous plate 26, the region other than the region where the film 64 is stuck on the porous plate 26 (that is, the through holes 26 a are formed by the respective films 64. The unsealed area) is the suction area of the web W. As shown in FIG. 5, the suction area of the web W has a sharp end at the upstream side in the conveyance direction of the web W. The suction region in the width direction of the web W gradually expands toward the downstream side in the conveyance direction of W. As a result, the web W transported by the transport unit 22 in the suction transport device 20 moves from the central position in the width direction to the outside as the region attracted by the suction unit 24 moves to the downstream side (that is, the left side in FIG. 5). The width gradually increases toward the end, and finally, the entire width direction of the web W is sucked by the suction portion 24. As described above, even when a pair of films 64 as shown in FIG. 5 is attached to the back surface of the porous plate 26, the web W conveyed by the conveying unit 22 is adsorbed as the web W moves downstream. Since the region attracted by the portion 24 gradually increases from the center position toward the outside, the occurrence of wrinkles on the web W is suppressed.

  Moreover, as a film stuck on the back surface of the porous plate 26, a pair of rectangular films 66 as shown in FIG. 6 may be used. When each film 66 as shown in FIG. 6 is stuck on the porous plate 26, the region other than the region where the film 66 is stuck on the porous plate 26 (that is, the through holes 26 a are formed by the respective films 66. The area that is not blocked) is the adsorption area of the web W. As shown in FIG. 6, the adsorption area of such a web W has a narrow upstream end in the conveyance direction of the web W. On the downstream side in the conveyance direction of the web W, the suction region in the width direction of the web W becomes wider. Thus, when the web W transported by the transport unit 22 in the suction transport device 20 moves downstream (that is, the left side in FIG. 6), the region sucked by the suction unit 24 is directed outward from the center position in the width direction. Eventually, the entire width direction of the web W is attracted by the attracting portion 24. As described above, even when a pair of films 66 as shown in FIG. 6 are attached to the back surface of the porous plate 26, the web W transported by the transport unit 22 is adsorbed as the web W moves downstream. Since the area attracted by the portion 24 increases from the center position toward the outside, the occurrence of wrinkles on the web W is suppressed.

  Further, in the present embodiment, instead of using the suction conveyance device 20 configured as shown in FIG. 2, a suction conveyance device 20a configured as shown in FIG. 7 may be used. The suction conveyance device 20a shown in FIG. 7 is shown in FIG. 2 in that a metal plate 27 is provided between the web W and the belt 22b of the conveyance unit 22 instead of providing the porous plate 26 on the surface of the adsorption unit 24. Although different from the suction conveyance device 20, the other configuration is substantially the same as the suction conveyance device 20 shown in FIG. In the description of the suction conveyance device 20a shown in FIG. 7, the same components as those of the suction conveyance device 20 shown in FIG.

  In the suction conveyance device 20a shown in FIG. 7, a thin metal plate 27 is fixedly provided on the surface of the belt 22b of the conveyance unit 22 instead of the porous plate 26 provided on the surface of the adsorption unit 24. The metal plate 27 is sandwiched between the web W and the belt 22b. Here, unlike the porous plate 26, the metal plate 27 is not provided with a through hole. In such a suction conveyance device 20a, the metal plate 27 is provided between the web W and the belt 22b, so that the suction region in the width direction of the web W expands toward the downstream side in the conveyance direction of the web W. It has become. The configuration of such a metal plate 27 will be described with reference to FIG. In FIG. 8, the conveyance direction of the web W is indicated by an arrow. Further, the vertical direction in FIG. 8 is the width direction of the web W.

  In the example shown in FIG. 8, two metal plates 27 each having a right triangle are provided between the web W and the belt 22b in a fixed position. Here, a region other than the region where each metal plate 27 is provided in the suction portion 24 (that is, a region where the through hole 26a is not blocked by each metal plate 27) is the suction region of the web W. FIG. As shown in FIG. 4, the suction area of the web W has a sharp upstream end in the conveyance direction of the web W, and the adsorption area in the width direction of the web W increases toward the downstream side in the conveyance direction of the web W. It will gradually spread. As a result, the web W transported by the transport unit 22 in the suction transport device 20 moves from the central position in the width direction to the outer side as it is moved downstream (that is, the left side in FIG. 8). The width gradually increases toward the end, and finally, the entire width direction of the web W is sucked by the suction portion 24. As described above, since the region sucked by the suction unit 24 gradually increases from the central position toward the outside as the web W moves downstream, the web W transported by the transport unit 22 Generation of wrinkles on the web W is suppressed.

  Note that the metal plate 27 provided between the web W and the belt 22b in order to suppress the generation of wrinkles in the web W is not limited to the shape shown in FIG. The shape of the metal plate 27 provided between the web W and the belt 22b can be varied as long as the suction area in the width direction of the web W can be expanded toward the downstream side in the conveyance direction of the web W. Can be changed.

  In the present embodiment, the films 60, 62, 64, and 66 are attached to the porous plate 26 provided in the adsorption unit 24, or the metal plate 27 is disposed between the web W and the belt 22 b of the conveyance unit 22. Instead of being provided, a suction part 24m having a shape as shown in FIG. 9 may be used. In FIG. 9, the conveyance direction of the web W is indicated by an arrow. 9 is the width direction of the web W. When the suction part 24m having a shape as shown in FIG. 9 is used, the suction region in the width direction of the web W becomes wider toward the downstream side in the conveyance direction of the web W. Specifically, when the suction portion 24m having a shape as shown in FIG. 9 is used, the suction region of the web W has a sharp end at the upstream side in the transport direction of the web W, and the transport direction of the web W The suction area in the width direction of the web W gradually expands toward the downstream side. As a result, the web W transported by the transport unit 22 in the suction transport device 20 moves from the central position in the width direction to the outside as the region attracted by the suction unit 24m moves to the downstream side (that is, the left side in FIG. 9). The width gradually increases toward the end, and finally, the entire width direction of the web W is adsorbed by the adsorbing portion 24m. Thus, since the area | region attracted | sucked by the adsorption | suction part 24m becomes large gradually toward the outer side from the center position about the web W conveyed by the conveyance part 22 as the said web W moves downstream, such a thing. Generation of wrinkles on the web W is suppressed.

  In addition, the adsorption | suction part 24m which suppresses generation | occurrence | production of a wrinkle in the web W is not limited to the thing as shown in FIG. If the suction region in the width direction of the web W can be expanded toward the downstream side in the conveyance direction of the web W, the shape of the suction portion 24m can be changed to various shapes.

  Further, as another configuration of the suction section in the present embodiment, a suction section 24n divided into a plurality of air chambers 24a as shown in FIG. 10 may be used. In addition, the conveyance direction of the web W is shown by the arrow in FIG. Further, the vertical direction in FIG. 10 is the width direction of the web W. In such an adsorbing part 24n, whether or not the web W is adsorbed for each air chamber 24a can be set for each air chamber 24a. Here, as shown in FIG. 10, whether or not the web W is adsorbed is set for each air chamber 24 a so that the adsorbing region in the width direction of the web W expands toward the downstream side in the conveyance direction of the web W. In this case (specifically, in FIG. 10, the air chamber 24a marked with “◯” is adsorbed to the web W, and the air chamber 24a marked “x” is adsorbed to the web W. When not performed), the suction region in the width direction of the web W becomes wider toward the downstream side in the conveyance direction of the web W. Specifically, as shown in FIG. 10, when it is set whether or not the web W is to be suctioned for each air chamber 24a of the suction portion 24n, the suction region of the web W is upstream in the conveyance direction of the web W. The side end portion becomes narrow, and the suction region in the width direction of the web W gradually expands toward the downstream side in the conveyance direction of the web W. As a result, the web W transported by the transport unit 22 in the suction transport device 20 moves from the central position in the width direction to the outside as the region attracted by the suction unit 24n moves downstream (that is, the left side in FIG. 10). The width gradually increases toward the end, and finally, the entire width direction of the web W is adsorbed by the adsorbing portion 24n. Thus, since the area | region attracted | sucked by the adsorption | suction part 24n becomes large gradually toward the outer side from the center position about the web W conveyed by the conveyance part 22 as the said web W moves downstream, such a thing. Generation of wrinkles on the web W is suppressed.

  Next, a web W processing method by the processing system 10 having the configuration shown in FIG. 1 and the like will be described with reference to the flowchart shown in FIG. In addition, the processing method of the web W by the processing system 10 shown below is performed when the control part 50 controls each structural member of the said processing system 10. FIG.

  First, the unwinding roll 12 is activated, and the web W is unwound from the unwinding roll 12 (STEP 1). Further, the power of the nip roll conveying system is turned on, and the nip rolls 14, 16, and 18 are driven to rotate (STEP 2). As a result, the leading end portion of the web W unwound from the unwinding roll 12 is transported by the nip rolls 14, 16, 18 (that is, so-called pass-through of the web W is performed). When the leading end portion of the web W unwound from the unwinding roll 12 is conveyed by the nip rolls 14, 16, and 18, the nip roll conveying system is temporarily stopped (STEP 3). Thereafter, the processing device 40 is activated and the power of the conveyor transport system is turned on, so that the web W is transported by the suction transport device 20 (STEP 4). As a result, processing such as printing can be performed on the web W. During the conveyance of the web W by the suction conveyance device 20, the upper nip rolls 16 and 18 in FIG. 1 move away from the lower nip rolls 16 and 18, respectively. W is not transported. Here, by moving the upper nip rolls 16 and 18 upward in FIG. 1 so as to be separated from the lower nip rolls 16 and 18, respectively, the upper nip rolls 16 and 18 are separated from the web W. It becomes possible to prevent the contents of the processing applied to the surface of the web W by the processing device 40 from being soiled by the nip rolls 16 and 18. Further, during the conveyance of the web W by the suction conveyance device 20, the tension of the web W unwound from the unwinding roll 12 by the pair of nip rolls 14 is adjusted.

  When the web W is transported by the suction conveyance device 20 and the processing is performed on the web W by the processing device 40, is an abnormality occurring in the web W by the web detection unit 39 of the suction conveyance device 20? Whether or not is detected is determined (STEP 5). Here, when an abnormality such as wrinkles, sagging, or bending has occurred in the web W after being transported by the transporting section 22, the web detecting section 39 detects such wrinkles, sagging, folding, or the like of the web W. Then (“YES” in STEP 5), the cause of the abnormality is determined in the control unit 50 (STEP 6), and processing for eliminating the abnormality is performed (STEP 7). Specifically, the web detection unit 39 detects that the web W after being transported by the belt 22b while being attracted to the belt 22b of the transport unit 22 by the suction unit 24 is wrinkled, slackened, broken, or the like. Then, in the three-way valve 34, the valve body 34a is switched from the solid line position in FIG. 12 to the two-dot chain line position, whereby the suction pipe 32 and the suction pipe 33 are brought into communication. As described above, since the other end of the suction pipe 33 is opened to the atmosphere, the air in the suction unit 24 is also released to the atmosphere, so that the suction of the web W by the suction unit 24 to the belt 22b is stopped. Become. As a result, abnormalities such as wrinkles, sagging and creases that have occurred in the web W are eliminated. Thereafter, the valve body 34a in the three-way valve 34 is immediately switched from the two-dot chain line position in FIG. 12 to the solid line position, whereby the suction pipe 32 and the suction pipe 36 are brought into communication with each other. Air is sucked again. Accordingly, the suction of the web W to the belt 22b by the suction unit 24 is performed again, and thus the transport of the web W by the suction transport device 20 is resumed. In the present embodiment, the time for which the valve element 34a is switched in the three-way valve 34 so that the air in the adsorption unit 24 is released to the atmosphere by the suction pipe 33 is a preset time (for example, a short time of 0.12 seconds or less). It has become. That is, in the three-way valve 34, as soon as a preset time has elapsed after the valve element 34a is switched from the solid line position in FIG. 12 to the two-dot chain line position, the valve element 34a is moved from the two-dot chain line position in FIG. By switching to the position, it is possible to shorten the time during which the conveyance of the web W by the suction conveyance device 20 is interrupted as much as possible while reliably eliminating abnormalities such as wrinkles, sagging, and creases generated in the web W. .

  Further, in the suction conveyance device 20 according to the present embodiment, the suction of the web W to the belt 22b by the suction unit 24 is stopped every time a preset predetermined period of time elapses, and a preset time (for example, , After the elapse of a short time of 0.12 seconds or less), the suction of the web W to the belt 22b by the suction portion 24 may be resumed. In this way, the suction of the web W to the belt 22b by the suction portion 24 is periodically stopped, and the air in the suction portion 24 is periodically released to the atmosphere, so that the web W has abnormalities such as wrinkles, sagging, and bending. Even when this occurs, such an abnormality can be eliminated, and the web W can be stably conveyed by the suction conveyance device 20.

  In the suction conveyance device 20 of the processing system 10 according to the present embodiment, an EPC (not shown) for detecting meandering of the web W conveyed by the conveyance unit 22 as a web detection unit for detecting an abnormality of the web W. A displacement meter (meander detection unit) is provided. When the meandering of the web W is detected by the EPC displacement meter, if there is a margin for moving the web W in the width direction (so-called side rail margin), the position of the belt 22b in the transport unit 22 is shifted by the shift unit 30. Is shifted along the width direction of the web W (that is, the direction orthogonal to the paper surface in FIG. 2), and thereby the web W is shifted to a predetermined position, thereby eliminating the meandering of the web W. Here, the shift operation of the belt 22b by the shift unit 30 may be performed in small increments. On the other hand, when the meandering of the web W is detected by the EPC displacement meter, if there is no allowance (side rail margin) for moving the web W in the width direction, first, the valve element 34a in the three-way valve 34 is shown in FIG. By switching from the solid line position to the two-dot chain line position, suction of the web W to the belt 22b by the suction part 24 is stopped, and then the position of the belt 22b in the transport part 22 is shifted to the origin position by the shift part 30. Thereafter, in the three-way valve 34, the suction of the web W to the belt 22b by the suction portion 24 is resumed by switching the valve element 34a from the two-dot chain line position in FIG. 12 to the solid line position, and then the web W reaches a predetermined position. Thus, the position of the belt 22b in the transport unit 22 is shifted along the width direction of the web W by the shift unit 30. This eliminates the meandering of the web W.

  Further, in the suction conveyance device 20 of the processing system 10 according to the present embodiment, an appearance inspection is performed to determine whether or not a foreign object is caught between the web W and the belt 22b of the conveyance unit 22. Good. Such an appearance inspection may be performed visually by an operator, or may be performed by a camera or the like provided on the side of the belt 22b of the transport unit 22. When it is detected in the suction conveyance device 20 that foreign matter is caught between the web W and the belt 22b of the conveyance unit 22, first, in the three-way valve 34, the valve element 34a is moved from the solid line position in FIG. By switching to the position, the suction of the web W to the belt 22b by the suction unit 24 is stopped, and then the driving of the belt 22b of the transport unit 22 is stopped. Thereafter, the foreign matter existing between the web W and the belt 22b of the transport unit 22 is removed by cleaning the belt 22b of the transport unit 22. When the foreign matter is removed, the driving of the belt 22b of the transport unit 22 is resumed and the suction of the web W to the belt 22b by the suction unit 24 is resumed.

  Further, in the suction conveyance device 20 of the processing system 10 according to the present embodiment, an inspection may be performed as to whether or not there is an abnormality in the numerical value of the web detection unit 39 including a laser displacement meter or the like. Such an inspection may be performed visually by an operator, or when the numerical value of the web detection unit 39 is abnormal, an alarm may be generated from the web detection unit 39. When it is detected that the numerical value of the web detection unit 39 is abnormal, first, in the three-way valve 34, the valve body 34a is switched from the solid line position in FIG. The suction to the belt 22b is stopped after a predetermined time (for example, a short time of 0.12 seconds or less) has elapsed. Thereafter, the web detection unit 39 performs zero point reset. In this way, even when the numerical value of the web detection unit 39 is abnormal, the abnormality of the web detection unit 39 can be resolved.

  In the processing system 10 according to the present embodiment, a tension meter (not shown) for detecting the tension of the web W may be provided as a web detection unit for detecting an abnormality of the web W. In this case, when there is an abnormality in the tension of the web W detected by the tensiometer, the operator can visually check the numerical value of the control panel (not shown) of the processing system 10 or can generate an alarm from the control panel. Will be emitted. When it is detected that the tension of the web W is abnormal, the relative speed of the web W conveyed by the conveyance unit 22 in the suction conveyance device 20 with respect to the speed of the web W unwound from the unwinding roll 12. By adjusting the tension, the tension of the web W is returned to an appropriate value. In this way, even when there is an abnormality in the tension of the web W, the abnormality in the tension of the web W can be resolved.

  Next, an operation for ending processing on the web W in the processing system 10 will be described. When the processing of the web W by the processing apparatus 40 is to be terminated (“YES” in STEP 8), first, the detection system (specifically, for example, the web detection unit 39) of the suction conveyance apparatus 20 is turned off (STEP 9). ). Next, conveyance of the web W by the conveyance part 22 of the adsorption conveyance apparatus 20 is complete | finished (STEP10). Further, suction on the conveyor is stopped in the suction conveyance device 20 (STEP 11). Specifically, the suction unit 24 is prevented from attracting the web W to the belt 22b by stopping the suction mechanism 38 such as a blower. Thereafter, the unwinding operation of the web W by the unwinding roll 12 is stopped (STEP 12). Moreover, the processing apparatus 40 is stopped. Finally, the entire power supply of the processing system 10 is turned off (STEP 13). In this way, the processing for the web W in the processing system 10 is completely completed.

  According to the suction conveyance device 20 of the present embodiment configured as described above and the suction conveyance method using such a suction conveyance device 20, the conveyance unit 22 for conveying the web W and the web W as the conveyance unit 22. An adsorption portion 24 for adsorbing to each other is provided, and an adsorption region by the adsorption portion 24 in the width direction of the web W is widened toward the downstream side in the conveyance direction of the web W. In this case, when the web W is attracted to the transport unit 22 (specifically, the belt 22b) by the suction unit 24, it is possible to suppress the occurrence of abnormality such as wrinkles in the web W. More specifically, if the entire width direction of the web W is sucked to the transport unit 22 by the suction unit 24 at a time, the web W may be wrinkled according to the pattern pattern of the web W. In the suction transport device 20 and the suction transport method of the present embodiment, the web W is transported by the suction section 24 (specifically, the transport section 22 (specifically, the area where the web W is sucked by the suction section 24) is gradually increased. When the belt 22b) is adsorbed, the occurrence of wrinkles on the web W is suppressed.

  Moreover, in the suction conveyance device 20 of the present embodiment, as described above, the suction portion 24 expands the suction region by the suction portion 24 in the width direction of the web W toward the downstream side in the conveyance direction of the web W. A restricting portion (specifically, films 60, 62, 64, 66) for restricting the range of the suction region is provided. In the present embodiment, the restricting portion for restricting the range of the suction region by the suction portion 24 is not limited to various films 60, 62, 64, and 66 as shown in FIGS. Moreover, in this Embodiment, the adsorption | suction area | region by the adsorption | suction part 24 controlled by the control part spreads outside from the center position in the width direction of the said web W toward the downstream in the conveyance direction of the web W. Yes. Further, as shown in FIG. 3 and FIG. 5, the upstream end portion in the conveyance direction of the web W may be sharp in the suction region by the suction portion 24 restricted by the restriction portion.

  Moreover, in the adsorption conveyance apparatus 20 of this Embodiment, as mentioned above, the porous board 26 is provided between the web W and the adsorption | suction part 24, and each film 60, 62, 64, 66 etc. The restricting portion is formed on the back surface of the porous plate 26 (that is, between the adsorption portion 24 and the porous plate 26). In the present embodiment, the restricting portion composed of each film 60, 62, 64, 66, etc. is not limited to being provided on the back surface of the porous plate 26, and the restricting portion is the surface of the porous plate 26. (In other words, it may be provided on the belt 22b side surface of the transport unit 22 in the porous plate 26).

  Further, in the suction conveyance device 20a according to the modification as shown in FIG. 7 or FIG. 8, the suction area by the suction portion 24 in the width direction of the web W is widened toward the downstream side in the conveyance direction of the web W. A metal plate 27 that restricts the range of the suction area by the portion 24 is provided between the conveyance portion 22 (specifically, the belt 22b) and the web W as a restriction portion. Even in this case, when the web W is adsorbed by the conveyance unit 22 (specifically, the belt 22b) by the adsorbing unit 24, the occurrence of wrinkles in the web W can be suppressed. Here, as a restricting portion provided between the conveyance unit 22 (specifically, the belt 22b) and the web W, for example, a plate-like member provided in a fixed position (specifically, a plate-like metal plate) 27) will be used.

  Further, in the present embodiment, as shown in FIG. 9, the suction portion 24m having a shape in which the suction region in the width direction of the web W is expanded toward the downstream side in the conveyance direction of the web W is used. It may be. Further, as shown in FIG. 10, a suction portion 24n divided into a plurality of air chambers 24a is used, and the suction region by the suction portion 24n in the width direction of the web W becomes closer to the downstream side in the conveyance direction of the web W. The setting as to whether or not the adsorption is performed in each air chamber 24a may be performed for each air chamber 24a so as to expand.

  Note that the processing system according to the present embodiment and the web W processing method using such a processing system are not limited to the above-described aspects, and various modifications can be made.

  For example, a roll-to-roll processing system 10a as shown in FIG. 14 may be used as the processing system according to the present embodiment. In such a processing system 10 a, the belt-like web W that has been subjected to processing such as printing by the processing device 40 is wound up by the winding roll 13. Even in such a roll-to-roll processing system 10a, as in the processing system 10 as shown in FIG. 1 and the like, the suction conveyance apparatus 20 moves in the width direction of the web W toward the downstream side in the conveyance direction of the web W. The adsorption area by the adsorption part 24 is expanded. Thus, when the web W is attracted to the transport unit 22 (specifically, the belt 22b) by the suction unit 24, it is possible to suppress the occurrence of abnormality such as wrinkles in the web W.

10, 10a Processing system 12 Unwinding roll 13 Winding rolls 14, 16, 18 Nip rolls 20, 20a Adsorption conveying device 22 Conveying unit 22a Pulley 22b Belts 24, 24m, 24n Adsorbing unit 24a Air chamber 26 Porous plate 26a Through hole 27 Metal plate 28 Mounting table 30 Shift section 32, 33 Suction pipe 34 Three-way valve 34a Valve body 34b Shaft 34c Opening section 36 Suction pipe 38 Suction mechanism 39 Web detection section 40 Processing apparatus 50 Control section 60, 62, 64, 66 Film

Claims (13)

A suction conveyance device for conveying a strip-shaped web,
A transport unit for transporting the web;
An adsorbing unit for adsorbing the web to the conveying unit;
With
A suction conveyance device in which a suction region by the suction portion in the width direction of the web is expanded toward the downstream side in the web conveyance direction.   The suction unit according to claim 1, further comprising a regulating unit that regulates a range of the suction region by the suction unit so that the suction region by the suction unit in the width direction of the web expands toward the downstream side in the web conveyance direction. Conveying device.   The adsorption area according to claim 2, wherein an adsorption area by the adsorption section regulated by the regulation section spreads outward from a center position in the width direction of the web as it goes downstream in the conveyance direction of the web. Conveying device.   4. The suction conveyance device according to claim 2, wherein the suction region by the suction unit regulated by the regulation unit has a sharp upstream end in the web conveyance direction. A porous plate is provided between the web and the adsorption part,
The suction conveyance device according to any one of claims 2 to 4, wherein the restricting portion is provided on a front surface or a back surface of the porous plate.   The suction conveyance device according to claim 2, wherein the restriction portion includes a film.   The suction conveyance device according to any one of claims 2 to 4, wherein the restriction portion is provided between the conveyance portion and the web.   The suction conveyance device according to claim 7, wherein the restriction portion is formed of a plate-like member provided with a fixed position.   The suction conveyance device according to claim 1, wherein the suction portion has a shape such that a suction region in a width direction of the web is expanded toward a downstream side in the web conveyance direction. The adsorption part is divided into a plurality of air chambers,
Whether or not to perform suction in each of the air chambers is set for each air chamber so that the suction region by the suction portion in the width direction of the web expands toward the downstream side in the web conveyance direction. The suction conveyance device according to claim 1. The transport unit has a belt,
The suction conveyance device according to claim 1, wherein the suction unit is configured to suck the web onto the belt. A plurality of through holes are formed in the belt,
The suction conveyance device according to claim 11, wherein the suction portion is provided on a side of the belt opposite to the web side. A suction conveyance method for conveying a belt-shaped web,
A step of adsorbing the web to a conveyance unit by an adsorption unit;
A step of transporting the web adsorbed by the transport unit by the transport unit;
With
A suction conveyance method in which a suction region by the suction portion in the width direction of the web is expanded toward a downstream side in the web transport direction.

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