JP6668130B2 - Sheet transport device - Google Patents

Description

  The present invention relates to a sheet conveying apparatus that conveys a sheet via a roller, and more particularly, to a sheet conveying apparatus having a charge removing function.

  In a transport device that transports a long continuous sheet or a sheet cut to a predetermined length along a predetermined transport path, peeling charging when the sheet leaves the outermost periphery of the supply roll around which the long sheet is wound, The sheet serving as a work may be charged due to frictional charging or the like due to contact with a roller, and various problems such as poor conveyance may occur.

  Patent Literature 1 discloses that in a transfer device that transfers an electrode foil from a supply roll to a winding device via a plurality of guide rollers, the electrode foil is generated by brushing downstream of a brushing device provided in the middle of a transfer path. A configuration having a static eliminator for removing static electricity is disclosed. Specifically, a pair of static eliminators are arranged so as to sandwich the electrode foil moving linearly from both sides.

JP 2006-147396 A

  In the conventional configuration in which the independent static eliminator is added in the transport path as described above, a space for installing the static eliminator is required in the transport path, and therefore, the transport path becomes unnecessarily long or reverse. In some cases, it is difficult to add a static eliminator because a space cannot be secured in the transport path.

In the sheet transporting device of the present invention, a plurality of ion air outlets are opened on the outer peripheral surface of at least one roller provided along the transport path, and these ion air outlets open a passage inside the roller. Connected to an ion air generation source via In particular, the roller includes a cylindrical outer cylinder in contact with the sheet, and a central shaft portion rotatably supporting the outer cylinder, and the ion air outlet is formed through the outer cylinder. In addition, a discharge port communicating with the passage is formed in a specific circumferential range on the outer peripheral surface of the central shaft portion.

  Therefore, the ion air is blown from the ion air outlet on the outer peripheral surface of the roller to the sheet being conveyed, and thereby the sheet is discharged.

  In addition, the term “sheet” in the present invention broadly includes a flexible sheet-shaped work such as a so-called sheet, film, foil, and the like. It does not matter if it is cut into pieces.

  According to the present invention, since the ion air is blown out from the roller used to convey the sheet, a space for adding another static eliminator in the conveyance path is unnecessary, and it is effective in a place where charging becomes a problem. It is possible to perform an effective static elimination.

FIG. 1 is a configuration explanatory view showing one embodiment of a sheet conveying device according to the present invention. FIG. 3 is a perspective view showing a supply roll and a most upstream guide roller. FIG. 4 is a cross-sectional view of an uppermost guide roller. FIG. 3 is a perspective view showing an outer cylinder of a guide roller. The perspective view of the outer cylinder which shows the modification of an ion air outlet. FIG. 3 is a perspective view of a central shaft portion provided with a discharge port.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  The transport device of one embodiment shown in FIG. 1 converts a separator made of a synthetic resin film constituting a part of an electrode laminate such as a lithium ion battery as a long sheet 1 to a laminate device (not shown). It is for carrying. The long sheet 1 is wound as a supply roll 1A, and the sheet 1 continuously supplied to a lamination device (not shown) is formed into individual sheets of a predetermined length immediately before a lamination line of the lamination device. After being cut, they are sequentially laminated together with a sheet-like positive electrode and negative electrode (not shown).

  The transport device of this embodiment is configured such that the first guide roller 2, the second guide roller 3, and the third guide roller 3 guide the long sheet 1 drawn from the supply roll 1A along a predetermined bent transport path. A guide roller 4 is provided. In addition, this transporting device includes an appropriate unillustrated feeding mechanism including, for example, a feeding roller that is driven to rotate, downstream of the third guide roller 4 in order to move the sheet 1 along the transporting path. .

  The first guide roller 2 is the most upstream guide roller closest to the supply roll 1A, supports the sheet 1 drawn from below the supply roll 1A at a position close to the supply roll 1A, and transfers the sheet 1 downstream to the second guide roller 3. It is guiding. The first guide roller 2 is in contact with one surface of the sheet 1 serving as an inner surface when wound as the supply roll 1A from above, and is relatively close to 180 ° in an initial stage where the diameter of the supply roll 1A is large. It has a turning angle. Therefore, the winding angle at which the sheet 1 is in contact with the outer peripheral surface of the first guide roller 2 is relatively small.

  The second guide roller 3 turns the conveyance path upward by about 90 ° on the downstream side of the first guide roller 2, and the second guide roller 3 is wound around the supply roller 1 </ b> A in the same manner as the first guide roller 2, and the second guide roller 3 is connected to the inner surface. Sheet 1 from above. In the second guide roller 3, the winding angle of the sheet 1 in contact with the outer peripheral surface is about 90 °.

  The third guide roller 4 turns the conveyance path extending upward from the second guide roller 3 by about 180 ° so as to make a U-turn downward, and is wound as the other surface of the sheet 1, that is, the supply roll 1A. In this state, the sheet 1 comes into contact with the outer surface of the sheet 1 from below. In the third guide roller 4, the winding angle of the sheet 1 in contact with the outer peripheral surface is about 180 °.

  These guide rollers 2, 3, and 4 function as literal guide rollers for guiding the sheet 1 along a predetermined conveyance path, and further have a charge eliminating function for neutralizing static electricity charged on the sheet 1. . Hereinafter, the configuration of the first guide roller 2 located at the most upstream position will be described in detail.

  FIG. 2 is a perspective view of the first guide roller 2, and FIG. 3 is a cross-sectional view of the first guide roller 2. The first guide roller 2 has a cylindrical outer cylinder 11 in contact with the sheet 1. A central shaft portion 12 that rotatably supports the outer cylinder 11. The center shaft portion 12 has a flange 14 at one end fixed to a base plate 13 along a vertical plane fixedly supported on a base (not shown) of the transfer device. It is supported in a cantilever manner. The outer cylinder 11 is rotatably supported by the center shaft 12 via a pair of bearings 15 located at both ends of the outer cylinder 11. The outer peripheral surface of the central shaft portion 12 and the inner peripheral surface of the outer cylinder 11 face each other with a very small gap.

  A pair of ion air passages 17 extending in the axial direction of the central shaft 12 are formed inside the central shaft 12. More specifically, in the circular cross section of the central shaft portion 12, the ion air passages 17 are arranged at two positions separated from each other by approximately 180 ° (see FIG. 1). The ends of these ion air passages 17 are connected to an air pipe 19 via a joint 18 disposed through the opening 13a of the base plate 13, and the air pipe 19 is connected to an ionizer device 20 as an ion air generating source. It is connected to the. The ionizer device 20 generates and discharges pressurized air containing ions, and the generated ion air is supplied to the ion air passage 17 through the air pipe 19.

  A plurality of discharge ports 21 are formed in the outer peripheral surface of the central shaft portion 12 so as to be opened at regular intervals along the axial direction of the central shaft portion 12. As shown in FIGS. 6 and 1, each of the discharge ports 21 has a slit shape elongated in the circumferential direction, and is partially connected to the ion air passage 17 through the communication passage 21a in the circumferential direction. Have been. More specifically, a first group of discharge ports 21 (shown as 21A) communicating with one ion air passage 17 and a second group of discharge ports 21 (shown as 21B) communicating with the other ion air passage 17 are provided. , And the discharge ports 21 of each group are formed as arc-shaped slits over a specific circumferential range of the outer peripheral surface. The range of formation of the discharge ports 21 in the circumferential direction of the outer peripheral surface corresponds to a desired direction in which the ion air is blown out, and the discharge ports 21A of the first group and the discharge ports 21B of the second group are moved to two desired positions. In order to supply the ion air toward the center, they are respectively arranged at two places on the opposite sides of the center of the central shaft portion 12. The discharge ports 21A of the first group and the discharge ports 21B of the second group are provided at the same position in the axial direction of the central shaft portion 12.

  As shown in FIG. 4, a large number of ion airs are provided on the outer cylinder 11 over the entire outer surface of the outer cylinder 11 corresponding to the discharge ports 21 opened on the outer peripheral surface of the central shaft portion 12 as described above. The outlet 23 is formed through. More specifically, a plurality of the ion air outlets 23 are arranged at regular intervals in the circumferential direction at an axial position of the outer cylinder 11 corresponding to an axial position of the discharge port 21. The ion air outlets 23 are arranged in the circumferential direction at each of a plurality of axial positions corresponding to. In addition, the positions of the plurality of ion air outlets 23 at one axial position and the positions of the plurality of ion air outlets 23 at adjacent axial positions may be aligned at the same position in the circumferential direction, or It may be in a state of being offset in the circumferential direction (for example, offset by a half pitch). The outer cylinder 11 can be formed from, for example, a metal material such as an aluminum alloy.

  The ion air outlet 23 is provided on the entire circumference of the outer cylinder 11, but when the outer cylinder 11 is combined with the center shaft portion 12, the discharge port 21 exists on the inner circumference side of the outer cylinder 11 in the circumferential direction. Ion air is ejected through the ion air outlet 23 only in the range. That is, the direction in which the ion air is blown out is defined by the formation range of the discharge port 21.

  Here, in the first guide roller 2 which is the most upstream guide roller closest to the supply roll 1A, as shown in FIG. 1, the separation point 25 where the sheet 1 is separated from the outer periphery of the supply roll 1A is directed. A first group of discharge ports 21A is formed. Further, the discharge ports 21B of the second group are located in the downstream area 26 of the first guide roller 2 of the sheet 1, that is, the area near the first guide roller 2 of the sheet 1 from the first guide roller 2 to the second guide roller 3. It is formed to be oriented.

  FIG. 6 shows the central shaft portion 12 with the outer cylinder 11 removed to show the configuration of the discharge port 21. However, for easy understanding, a sheet passing through the first guide roller 2 is shown. 1 is shown together with the supply roll 1A. By arranging the two groups of discharge ports 21 (21A, 21B) in two directions in this manner, ion air blowing in two directions is achieved.

  By the way, in the illustrated example, the discharge port 21 is provided by dividing into a plurality in the axial direction, but may be formed as one large discharge port 21 continuous in the axial direction.

  The second guide roller 3 and the third guide roller 4 located downstream from the first guide roller 2 basically have the same ion air blowing mechanism as the first guide roller 2 described above. However, in the second guide roller 3 and the third guide roller 4, as shown in FIG. 1, only one ion air passage 17 and one discharge port 21 provided in the central shaft portion 12 are provided, and ion air is provided in one direction. It is configured to blow out. Specifically, similarly to the discharge ports 21B of the second group of the first guide roller 2, the discharge is directed to the downstream area 27 of the second guide roller 3 or the downstream area 28 of the third guide roller 4 of the sheet 1. A port 21 is formed.

  In the sheet 1 transport device configured as described above, the sheet 1 is transported while supplying the ion air from the ionizer device 20 to the ion air passage 17 of each of the guide rollers 2, 3, and 4. Ion air is blown from the first guide roller 2 toward the separation point 25 of the supply roll 1A as shown by an arrow in FIG. 1, and ion air is blown toward the downstream region 26 of the first guide roller 2. Can be As the sheet 1 is separated from the outermost periphery of the supply roll 1A, the sheet 1 is charged due to the generation of static electricity, as is known as the separation charging. However, the discharge ports 21A of the first group of the first guide roller 2 are provided. The static electricity charged on the sheet 1 is neutralized by the ion air supplied toward the peeling point 25 from the substrate 1, that is, the static electricity is eliminated. Further, when the sheet 1 passes through the first guide roller 2, charging due to friction or contact may occur. However, this is removed by the supply of ion air to the downstream area 26 of the first guide roller 2. You. Similarly, in the second guide roller 3 and the third guide roller 4, static electricity due to friction or contact with the guide rollers 3, 4 is eliminated by the supply of ion air toward the downstream regions 27, 28.

  As described above, in the above-described configuration, the guide rollers 2, 3, and 4 that guide the sheet 1 along the predetermined transport path function as an ion air supply unit, and are provided in the transport path having a limited length and space. Static electricity can be reliably removed. In other words, there is no need for a space for arranging a dedicated static eliminator in the transport path, so that the space can be effectively used and the transport device can be simplified. Further, the supply of ion air to the ion air outlet 23 of the outer cylinder 11 is also performed from the base plate 13 side through the ion air passage 17 of the central shaft portion 12, so that there is no influence on the transport path.

  In the above embodiment, the first guide roller 2 supplies ion air in two directions, and the second guide roller 3 and the third guide roller 4 blow out ion air only in one direction. These can be changed appropriately. For example, the second guide roller 3 may be configured to supply ion air in two directions, and the sheet 1 located between the first guide roller 2 and the second guide roller 3 may be discharged.

  Further, in the embodiment of FIG. 1, for the sake of explanation, all of the guide rollers 2, 3, and 4 are provided with a charge eliminating function, that is, an ion air supply mechanism. However, when the transporting apparatus has a large number of guide rollers, it is not always necessary. It is not necessary to provide an ion air supply mechanism for all of them. It is possible to provide an ion air supply mechanism only at a location where charging is a problem, or to select a relatively large guide roller and provide an ion air supply mechanism.

  FIG. 5 shows another embodiment of the outer cylinder 11 in which the shape of the ion air outlet 23 is changed. In this embodiment, the ion air outlet 23 is formed in a slit shape elongated in the circumferential direction of the outer cylinder 11. Then, between the two ion air outlets 23 circumferentially adjacent to each other, a connecting portion 31 for integrating the components of the outer cylinder 11 in the axial direction remains. In other words, at the axial position of the outer cylinder 11 corresponding to the axial position of the discharge port 21 of the central shaft portion 12, the slit-like ion air outlet 23 substantially continuous over the entire circumference of the outer cylinder 11. In order to maintain the required rigidity and strength as the outer cylinder 11 while obtaining the above, the connecting portion 31 which is a part of the outer peripheral surface is left in several places in the circumferential direction.

  Also in the configuration having such an ion air outlet 23, the direction of the ion air outlet is determined by the position of the discharge port 21, as in the above-described embodiment.

  Although the embodiment in which the present invention is applied to the guide roller of the long sheet 1 has been described above, the present invention is not necessarily limited to the guide roller that freely rotates. For example, the outer cylinder is rotationally driven by a driving mechanism. The present invention can be similarly applied to a delivery roller or the like that is used.

  Further, the present invention is not limited to a sheet wound as a supply roll, but is also applicable to a transport device that transports a sheet that has been cut to a predetermined length along a predetermined transport path.

1 ... Sheet 1
Reference Signs List 1A 1 supply roll 2 1st guide roller 3 2nd guide roller 4 3rd guide roller 11 outer cylinder 12 center shaft 17 ion air passage 20 ionizer device 21 discharge port 23 ion air outlet 25 Separation points 26, 27, 28 ... Downstream area

Claims (4)

A sheet transport device that includes a plurality of rollers along a predetermined transport path and transports a sheet via these rollers,
In a sheet conveying device, a plurality of ion air outlets are opened on an outer peripheral surface of at least one roller, and these ion air outlets are connected to an ion air generating source via a passage inside the roller .
The roller includes a cylindrical outer cylinder in contact with the sheet, and a central shaft portion rotatably supporting the outer cylinder,
The ion air outlet is formed through the outer cylinder,
A sheet conveying device , wherein a discharge port communicating with the passage is formed in a specific circumferential range on an outer peripheral surface of the center shaft portion . The most upstream roller closest to the supply roll wound with a long sheet is provided with the above ion air outlet,
The sheet conveying device according to claim 1 , wherein the discharge port is provided so as to point at a separation point at which a sheet is separated from the supply roll. 2. The sheet conveying device according to claim 1 , wherein the discharge port is provided so as to direct a downstream area of the roller of the sheet in contact with the outer peripheral surface of the roller. 3. The sheet conveying device according to any one of claims 1 to 3 , wherein the roller having the ion air outlet is a guide roller that turns a conveying path at a predetermined angle.

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