Sheet conveying device and adjustment method of sheet

Abstract

The invention provides a sheet conveying device and an adjusting method of the sheet conveying device. The sheet conveying device is not easy to make contact with a turning part for turning the sheet. The sheet conveyance device includes: a first conveyance unit that conveys a belt-shaped sheet having a first surface and a second surface opposite to the first surface such that the first surface faces downward; a turning section that has a convex curved surface having an axis extending in the width direction of the sheet, is provided downstream of the first conveying section in the conveying direction of the sheet 1, and flips the sheet along the convex curved surface so that the first surface becomes the inside; a second conveyance unit that is provided downstream of the turning unit in the conveyance direction and conveys the sheet such that the second surface faces downward; and an injection device that is provided with a gas nozzle that is provided at a boundary section between the first conveying section and the turning section and that extends in the width direction of the sheet, and that injects gas from the gas nozzle. The gas nozzle is configured so as to be adjustable in width in the conveyance direction.

Description

Technical Field

[0001] This invention relates to a sheet conveying device and a method for adjusting the sheet conveying device. Background Technology

[0002] For example, Japanese Patent Application Publication No. 2023-003004 discloses a drying apparatus that dries a strip of metal foil coated with a coating material while conveying it. In the drying apparatus described in Japanese Patent Application Publication No. 2023-003004, the conveying path is reversed twice in the vertical direction, thus forming a three-section conveying path. A semi-cylindrical gas guide rod is provided at the reversal section from the second to the third section. The metal foil is conveyed along the outer periphery of the semi-cylindrical gas guide rod with the side containing the coating material as the inner side. The wall of the gas guide rod is made of a mesh and configured to blow gas from the wall. According to Japanese Patent Application Publication No. 2023-003004, the metal foil is floated off the gas guide rod by the gas blown out, and conveying is possible while maintaining a predetermined gap between the metal foil and the gas guide rod. The metal foil can be reversed in a non-contact manner within the gas guide rod.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2023-003004

[0004] In the sheet conveying device described in Japanese Patent Application Publication No. 2023-003004, if the metal foil comes into contact with a gas deflector used to change the orientation of the metal foil, the coating material applied to the metal foil is damaged. Here, a sheet conveying device is proposed that makes it less likely for the sheet to come into contact with the deflector that flips the sheet. Furthermore, a method for adjusting the sheet conveying device in a manner that makes it less likely for the sheet to come into contact with the deflector is proposed. Summary of the Invention

[0005] The sheet conveying device proposed herein includes: a first conveying unit that conveys a strip-shaped sheet having a first surface and a second surface having a back surface of the first surface in a manner with the first surface facing downwards; a turning unit that has a convex curved surface whose axis extends along the width direction of the sheet and is located downstream of the first conveying unit in the conveying direction of the sheet, and flips the sheet along the convex curved surface such that the first surface is inwards; a second conveying unit that is located downstream of the turning unit in the conveying direction and conveys the sheet in a manner with the second surface facing downwards; and a spraying device that has a gas nozzle located at the boundary between the first conveying unit and the turning unit and extending along the width direction of the sheet, and sprays gas from the gas nozzle, the gas nozzle being configured to adjust the width in the conveying direction.

[0006] According to the above-described sheet conveying device, by adjusting the width of the gas nozzle, which is related to the conveying direction of the sheet, the airflow and velocity of the gas ejected from the gas nozzle can be adjusted. By adjusting the airflow and velocity of the gas ejected from the gas nozzle, a sheet conveying device that makes it less likely for the sheet to come into contact with the turning part can be achieved.

[0007] Furthermore, regarding the adjustment method of the sheet conveying device proposed herein, the sheet conveying device comprises: a first conveying section that conveys a strip-shaped sheet having a first surface and a second surface having a back surface of the first surface in a manner with the first surface facing downwards; a turning section that has a convex curved surface whose axis extends along the width direction of the sheet and is located downstream of the first conveying section in the conveying direction of the sheet, and flips the sheet along the convex curved surface such that the first surface is inwards; a second conveying section that is located downstream of the turning section in the conveying direction and conveys the sheet in a manner with the second surface facing downwards; and a jetting device that has a gas nozzle located at the boundary between the first conveying section and the turning section and extending along the width direction of the sheet, and jets gas from the gas nozzle. The aforementioned convex surface includes: a small-diameter portion opposite to the central portion in the width direction of the sheet; and a pair of large-diameter portions disposed on both sides of the small-diameter portion in the axial direction, extending radially outward beyond the small-diameter portion, and supporting both ends of the sheet in the width direction. The gas nozzle is configured to adjust the width of the sheet in the conveying direction. The adjustment method of the sheet conveying device includes: a measurement step of measuring the radial position difference between the two ends of the sheet in the width direction supported by the pair of large-diameter portions and the central portion of the sheet in the width direction; and an adjustment step of adjusting the width of the gas nozzle in the conveying direction such that the radial position difference measured by the measurement step is within a predetermined range.

[0008] According to the above adjustment method, the airflow and velocity of the gas are adjusted by adjusting the width of the gas nozzles related to the conveying direction of the sheet, so that the radial position difference between the two ends of the sheet supported by the large-diameter portion in the width direction and the center portion of the sheet in the width direction is within a predetermined range. This adjustment ensures the gap between the center portion of the sheet in the width direction and the small-diameter portion. As a result, it is less likely for the sheet to come into contact with the turning portion. Attached Figure Description

[0009] Figure 1 This is a schematic cross-sectional view of a sheet conveying device.

[0010] Figure 2 This is a three-dimensional view of the steering mechanism.

[0011] Figure 3 This is a schematic front view of the steering section.

[0012] Figure 4 This is a block diagram of a sheet conveying device.

[0013] Figure 5 This is a flowchart involving the width control of the gas nozzle.

[0014] Figure 6 This is a flowchart involving the control of the width of the gas nozzle and the angle of the rectifier plate.

[0015] Figure 7 It is a coordinate graph that shows the relationship between the amount of electrode sheet levitation, the tension applied to the electrode sheet, and whether or not wrinkles are generated in the electrode sheet.

[0016] Explanation of reference numerals in the attached figures

[0017] 1...Electrode sheet (sheet); 1A...Coated surface (first surface); 1B...Uncoated surface (second surface); 2...Electrode foil; 3...Coating material; 3A...Coated section; 4A...Uncoated section; 10...Sheet conveying device; 20...First conveying section; 21...Upstream gas nozzle; 21a...Gas supply section; 22...Upstream conveying roller; 22a...Roller drive section; 30...Tuning section; 31...Convex curved surface; 32...Small diameter section; 32a...Internal space; 32b...Gas inlet; 32c...Rear wall; 33...Large diameter section; 33a...Rotating shaft; 33b...Suction hole; 34...Upstream auxiliary roller; 34a...Rotating shaft; 35...Downstream auxiliary roller; 35a...Rotating shaft; 36...Support member; 37...Pressure reducing pipe; 40...Second conveying section; 41... ...Downstream gas nozzle; 41a...Gas supply unit; 42...Downstream conveyor roller; 42a...Roller drive unit; 50...Gas injection device (injection device); 51...Gas nozzle; 51a...Downstream side block (downstream side component); 51a1...Upper slope; 51a2...Lower slope; 51b...Upstream side plate (upstream side component); 52...Gas injection hole; 53...Air supply fan; 54...First drive unit; 55...Arm; 56...Second drive unit; 57...Rectifier plate; 57a...Gas inlet; 60...Winding device; 70...Torque detection device; 80...Position detection device; 100...Control device; 101...Tension setting unit; 102...Tension control unit; 103...Air volume adjustment unit (adjustment device); W1...Width of gas nozzle; θ...Angle of rectifier plate. Detailed Implementation

[0018] The following describes one embodiment of the sheet conveying device. It should be noted that the embodiment described herein is not intended to specifically limit the invention. Furthermore, the figures are schematic diagrams and may not faithfully reflect the actual embodiments. Hereinafter, components and parts that perform the same function will be labeled with the same reference numerals, and repeated descriptions will be omitted or simplified as appropriate.

[0019] [Structure of the sheet conveying device]

[0020] Figure 1 This is a schematic cross-sectional view of the sheet conveying device 10. The sheet conveying device 10 is a device for conveying the electrode sheet 1 of the energy storage device. In this specification, "energy storage device" is a term for all devices capable of extracting electrical energy, including primary batteries and secondary batteries, and includes chemical batteries such as lithium-ion secondary batteries and nickel-metal hydride batteries, as well as physical batteries such as double-layer capacitors.

[0021] like Figure 1 As shown, the sheet conveying device 10 is configured to flip the electrode sheet 1 during conveying and change the conveying direction. The electrode sheet 1 is a structure in which a coating material 3 (paste) containing an electrode active substance is coated on one surface of an electrode foil 2, and is formed in a strip shape. The electrode sheet 1 has a coated surface 1A coated with the coating material 3 and an uncoated surface 1B serving as the back side of the coated surface 1A. The electrode sheet 1 has a pair of uncoated portions 4A at both ends in the width direction of the coated surface 1A, which are not coated with the coating material 3 (see reference). Figure 2 as well as Figure 3 In addition, Figure 2 as well as Figure 3 In this diagram, the coating surface 1A is the lower surface of the electrode sheet 1. Hereinafter, the area in the coating surface 1A coated with the coating material 3 will also be referred to as the coating section 3A. The illustrated portion of the sheet conveying device 10 here represents a structure for conveying the electrode sheet 1 in a state where the coating material 3 is not yet dried. However, the illustrated portion of the sheet conveying device 10 can also represent a structure for conveying the electrode sheet 1 after the coating material 3 has been dried.

[0022] like Figure 1As shown, the sheet conveying device 10 includes: a first conveying section 20 for conveying electrode sheet 1; a turning section 30 disposed downstream of the first conveying section 20 in the conveying direction of electrode sheet 1; a second conveying section 40 disposed downstream of the turning section 30 in the conveying direction of electrode sheet 1; a gas injection device 50 for injecting gas at the turning section 30 to levitate electrode sheet 1; and a winding device 60 disposed further downstream of the second conveying section 40 in the conveying direction of electrode sheet 1. The first conveying section 20 and the second conveying section 40 are respectively disposed approximately horizontally. In the first conveying section 20, the electrode sheet 1 is conveyed downward with the coated surface 1A facing down. In the turning section 30, the electrode sheet 1 is flipped so that the coated surface 1A faces inward with the uncoated surface 1B facing down. By flipping the electrode sheet 1, the upper and lower surfaces of the electrode sheet 1 are interchanged. In the second conveying section 40, the electrode sheet 1 is conveyed with the uncoated surface 1B facing down. The second conveying section 40 is positioned below the first conveying section 20.

[0023] The first conveying unit 20 includes an upstream gas nozzle 21 that sprays gas toward the coating surface 1A of the electrode sheet 1. The first conveying unit 20 is configured to lift the electrode sheet 1 using the sprayed gas. This prevents the undried (or dried) coating material 3 from contacting the sheet conveying device 10, and prevents the coating material 3 from peeling off. The upstream gas nozzle 21 is positioned below the conveying path of the electrode sheet 1 in the first conveying unit 20 and sprays gas upwards. An upstream conveying roller 22 is provided above the conveying path of the electrode sheet 1 in the first conveying unit 20. The upstream conveying roller 22 contacts the uncoated surface 1B of the electrode sheet 1, conveying the electrode sheet 1 downstream. Figure 4 As shown, the first conveying unit 20 includes a gas supply unit 21a that supplies compressed gas to the upstream gas nozzle 21, and a roller drive unit 22a that rotates the upstream conveying roller 22.

[0024] In this embodiment, the upstream gas nozzle 21 is also a nozzle that sprays gas for drying the coating material 3. In this embodiment, the electrode sheet 1 is dried while being conveyed by the sheet conveying device 10. However, the sheet conveying device 10 may also convey the electrode sheet 1, with the coating material 3 in an undried state, to a separately provided drying device.

[0025] The steering section 30 includes a convex surface 31 along which the electrode sheet 1 rotates. The gas injection device 50 is configured to blow gas from the convex surface 31 toward its radially outer side. Thus, the coating portion 3A of the electrode sheet 1 is conveyed while separated from the convex surface 31. By separating the coating portion 3A from the convex surface 31, damage to the coating portion 3A due to contact with the steering section 30 is prevented. Detailed structures of the steering section 30 and the gas injection device 50 will be described later.

[0026] The second conveying unit 40 includes a downstream gas nozzle 41 that injects gas toward the coating surface 1A of the electrode sheet 1. The downstream gas nozzle 41 is positioned above the conveying path of the electrode sheet 1 in the second conveying unit 40 and injects gas downwards. The electrode sheet 1 is conveyed in the second conveying unit 40 such that the coating surface 1A is facing upwards. A downstream conveying roller 42 is provided below the conveying path of the electrode sheet 1 in the second conveying unit 40. The downstream conveying roller 42 contacts the uncoated surface 1B, which forms the lower surface of the electrode sheet 1, and conveys the electrode sheet 1 downstream. Figure 4 As shown, the second conveying unit 40 includes a gas supply unit 41a that supplies compressed gas to the downstream gas nozzle 41, and a roller drive unit 42a that rotates the downstream conveying roller 42.

[0027] The winding device 60 pulls the electrode sheet 1 downstream in the conveying direction by winding the electrode sheet 1. Tension is applied to the electrode sheet 1 by the winding device 60. The winding device 60 is an example of a pulling device for pulling the electrode sheet 1. The pulling device could also be, for example, a pair of clamping rollers for conveying the electrode sheet 1. When the pulling device is a pair of clamping rollers, the electrode sheet 1 is pulled by rotating the pair of clamping rollers while the electrode sheet 1 is clamped between them. Here, the winding device 60 includes a motor (not shown) whose winding torque varies according to the value of the flowing current.

[0028] The sheet conveying device 10 includes a torque detection device 70 that detects the torque at which the winding device 60 pulls the electrode sheet 1. Based on the torque detected by the torque detection device 70, the winding device 60 controls the current flowing in the motor to achieve a predetermined winding torque. Through this control, the winding device 60 pulls the electrode sheet 1 to apply a predetermined tension. However, the structure of the winding device 60 for pulling the electrode sheet 1 with a predetermined tension is not limited to this. For example, the winding device 60 may be configured to simply apply a predetermined tension to the electrode sheet 1 by causing a current corresponding to the tension to flow in the motor. In this case, the sheet conveying device 10 may not include the torque detection device 70.

[0029] [Structure of the steering unit]

[0030] The structure of the steering unit 30 will be described below. Figure 2 This is a perspective view of the steering unit 30. Figure 3 This is a schematic front view of the steering unit 30. (Example) Figure 2 as well as Figure 3As shown, the turning portion 30 has a convex curved surface 31 whose axis extends in the width direction of the electrode sheet 1. The turning portion 30 flips the electrode sheet 1 along the convex curved surface 31 such that the coating surface 1A faces inward. Figure 2 as well as Figure 3 As shown, the convex surface 31 includes a small diameter portion 32, a pair of large diameter portions 33 disposed on both sides of the small diameter portion 32 in the axial direction (width direction of the electrode sheet 1), a pair of upstream auxiliary rollers 34 that abut against the pair of large diameter portions 33 respectively, and a pair of downstream auxiliary rollers 35 that abut against the pair of large diameter portions 33 respectively.

[0031] like Figure 1 As shown, the small diameter portion 32 is configured as a semi-circular shape with its axis extending in the width direction of the electrode sheet 1. In this embodiment, the small diameter portion 32 extends to the upstream side of the electrode sheet 1 in the transport direction, beyond the uppermost point in the 12 o'clock direction. The small diameter portion 32 is formed to be larger than a semi-circle (equivalent to 180 degrees) (a circumference with an angle larger than 180 degrees).

[0032] like Figure 2 As shown, a pair of large-diameter portions 33 are disposed on both sides of the small-diameter portion 32 along its axial direction, and extend radially outward beyond the small-diameter portion 32. The large-diameter portions 33 are configured to be concentric with the small-diameter portion 32. The radius of each large-diameter portion 33 is larger than the radius of the small-diameter portion 32. The difference between the radius of the large-diameter portion 33 and the radius of the small-diameter portion 32 is preferably, for example, 1 mm or more and 5 mm or less. The pair of large-diameter portions 33 support the uncoated portions 4A disposed at both ends of the electrode sheet 1 in the width direction, and more specifically, at both ends of the coating surface 1A. The electrode sheet 1 contacts the turning portion 30 (large-diameter portion 33) at the uncoated portions 4A at both ends. The small-diameter portion 32 is opposite to the central portion in the width direction of the electrode sheet 1, which is the coated portion 3A. The coated portion 3A of the electrode sheet 1 does not contact the small-diameter portion 32, nor does it contact the pair of large-diameter portions 33.

[0033] A pair of large-diameter portions 33 are configured to rotate about a rotation axis 33a extending along the axial direction (the width direction of the electrode sheet 1). The steering portion 30 includes a support member 36 that supports the pair of large-diameter portions 33 so that they can rotate. The outer portions of the large-diameter portions 33 in the axial direction are supported by the support member 36 so that they can rotate. In this embodiment, the large-diameter portions 33 are supported on one side by the support member 36. However, it is also possible that the large-diameter portions 33 are supported by the small-diameter portions 32 so that they can rotate. Alternatively, here, the support member 36 supports the small-diameter portions 32 so that they cannot rotate.

[0034] like Figure 2As shown, multiple suction holes 33b for attracting gas are formed in the large diameter portions 33. The large diameter portions 33 are hollow and have an internal space (not shown). Here, each suction hole 33b is a roughly circular through hole that penetrates the circumferential surface of the large diameter portion 33 and communicates with the internal space of the large diameter portion 33. Multiple suction holes 33b are arranged throughout the entire circumference of the large diameter portions 33. However, the shape and arrangement of the suction holes 33b are not particularly limited.

[0035] The steering unit 30 includes a pair of pressure-reducing pipes 37 that draw gas from the internal spaces of a pair of large-diameter portions 33. The pressure-reducing pipes 37 are connected to the rotation shaft 33a of the large-diameter portion 33 and communicate with the internal space of the large-diameter portion 33. A fan (not shown) is connected to the other end of each pressure-reducing pipe 37. When the fan is driven, the internal space of the large-diameter portion 33 is depressurized, and external gas is drawn in through a plurality of suction holes 33b formed on the circumferential surface of the large-diameter portion 33. As a result, the electrode sheet 1 (specifically, the uncoated portion 4A) supported by the large-diameter portion 33 is adsorbed onto the large-diameter portion 33. The electrode sheet 1 is pressed against the large-diameter portion 33 by the tension applied by the winding device 60, and is adsorbed onto the large-diameter portion 33 by the depressurization of the internal space of the large-diameter portion 33. However, it is also possible that no mechanism for adsorbing the electrode sheet 1 is provided in the large-diameter portion 33. In this case, the electrode sheet 1 may be pressed against the large-diameter portion 33 solely by the tension applied by the winding device 60.

[0036] A pair of upstream auxiliary rollers 34 are configured to rotate about a rotation axis 34a extending parallel to the rotation axis 33a of the pair of large-diameter portions 33. A support member 36 supports the pair of upstream auxiliary rollers 34 so that they can rotate. The pair of upstream auxiliary rollers 34 abut against the pair of large-diameter portions 33. Therefore, if the pair of large-diameter portions 33 rotate, the pair of upstream auxiliary rollers 34 rotate accordingly. Here, the pair of upstream auxiliary rollers 34 are positioned upstream of the small-diameter portion 32 in the conveying direction of the electrode sheet 1. The pair of upstream auxiliary rollers 34 are positioned above the central axis (rotation axis 33a of the large-diameter portion 33) of the small-diameter portion 32 and the large-diameter portion 33. The pair of upstream auxiliary rollers 34 abut against the semi-circular portion of the large-diameter portion 33 opposite to one of the supporting electrode sheet 1 (the semi-circular portion arranged side-by-side with the small-diameter portion 32). A pair of upstream auxiliary rollers 34 suppress the oscillation of the large-diameter portion 33 around the rotation axis 33a. The pair of upstream auxiliary rollers 34, by bearing the electrode sheet 1 towards the first conveying section 20 (… Figure 1 (To the right) Press the large diameter part 33 to suppress the rotational swing of the large diameter part 33.

[0037] A pair of downstream auxiliary rollers 35 are also configured to rotate about a rotation axis 35a extending parallel to the rotation axis 33a of the pair of large-diameter portions 33. A support member 36 supports the pair of downstream auxiliary rollers 35 so that they can rotate. The pair of downstream auxiliary rollers 35 also abut against the pair of large-diameter portions 33, and rotate subsequently if the pair of large-diameter portions 33 rotate. The pair of downstream auxiliary rollers 35 are located downstream of the small-diameter portion 32 in the conveying direction of the electrode sheet 1. The pair of downstream auxiliary rollers 35 are positioned below the central axis (rotation axis 33a of the large-diameter portion 33) of the small-diameter portion 32 and the large-diameter portion 33. The pair of downstream auxiliary rollers 35 also abut against the semi-circular portion of the large-diameter portion 33 opposite to the semi-circular portion supporting the electrode sheet 1. Together with the upstream auxiliary rollers 34, the pair of downstream auxiliary rollers 35 suppress the oscillation of the large-diameter portion 33 about the rotation axis 33a. Alternatively, the upstream auxiliary roller 34 and the downstream auxiliary roller 35 may not be divided into two parts respectively in a manner corresponding to a pair of large-diameter portions 33, but may be a single, relatively long roller.

[0038] like Figure 3 As shown, the sheet conveying device 10 includes a position detection device 80 for detecting the position of the electrode sheet 1 in the turning section 30. The position detection device 80 detects the radial position difference ΔT of the small-diameter portion 32 between the two ends (here, the uncoated portion 4A) of the electrode sheet 1 supported by a pair of large-diameter portions 33 in the width direction and the central portion (here, the coated portion 3A) of the electrode sheet 1 floating on the small-diameter portion 32 in the width direction. The vertical positions of the two ends of the electrode sheet 1 supported by the pair of large-diameter portions 33 in the width direction are known in advance. The position detection device 80 detects the vertical position of the central portion of the electrode sheet 1 floating on the small-diameter portion 32 in the width direction. The radial position difference ΔT between the two ends and the central portion of the electrode sheet 1 is obtained by subtracting the known heights of the two ends of the electrode sheet 1 from the measured height of the central portion of the electrode sheet 1. However, the position detection device 80 can also measure the heights of the two ends of the electrode sheet 1. The position detection device 80 is, for example, a non-contact laser displacement meter. However, the position detection device 80 is not particularly limited; for example, it can also be a contact displacement meter.

[0039] [Structure of the gas injection device]

[0040] like Figure 1 As shown, the gas injection device 50 includes: a gas nozzle 51 disposed at the boundary between the first conveying section 20 and the deflecting section 30; a plurality of gas injection holes 52 disposed at the small-diameter section 32 of the deflecting section 30; and a blower fan 53 for generating airflow. The gas injection device 50 injects gas from the gas nozzle 51 and the plurality of gas injection holes 52 by driving the blower fan 53. Figure 1As shown, the small-diameter portion 32 is hollow. A blower fan 53 supplies air into the internal space 32a of the small-diameter portion 32. The small-diameter portion 32 has a gas inlet 32b for introducing gas into the internal space 32a. The gas inlet 32b is connected to the blower fan 53. A gas nozzle 51 and a plurality of gas injection holes 52 penetrate the small-diameter portion 32 and communicate with the internal space 32a. Gas supplied to the internal space 32a by the blower fan 53 is injected from the gas nozzle 51 and the plurality of gas injection holes 52. Alternatively, the gas may not be supplied by the blower fan 53, but by, for example, a gas compressor that generates compressed gas.

[0041] The gas injection hole 52 is a through hole with a roughly circular cross-section. In this embodiment, a plurality of gas injection holes 52 are equally arranged throughout the arcuate portion of the small-diameter portion 32. However, the shape and arrangement of the plurality of gas injection holes 52 are not particularly limited. For example, some or all of the plurality of gas injection holes 52 may be configured as elongated holes that are longer in the width direction of the electrode sheet 1. The plurality of gas injection holes 52 may also be configured such that the density on the upstream side of the electrode sheet 1 in the conveying direction is higher than the density on the downstream side.

[0042] like Figure 2 As shown, the gas nozzle 51 is configured as a slit extending in the width direction of the electrode sheet 1. Here, the gas nozzle 51 is positioned upstream of the electrode sheet 1 in the transport direction, closer to the uppermost point in the 12 o'clock direction than the small diameter portion 32. The gas nozzle 51 is configured to be able to change the width of the electrode sheet 1 in the transport direction. Figure 1 (As shown in W1).

[0043] like Figure 1 As shown, the gas nozzle 51 includes a downstream side block 51a constituting the downstream sidewall portion of the gas nozzle 51, and an upstream side plate 51b disposed upstream of the downstream side block 51a and constituting the upstream sidewall portion of the gas nozzle 51. The upstream side plate 51b and the downstream side block 51a are respectively configured to be movable in the conveying direction of the electrode sheet 1. By moving at least one of the upstream side plate 51b and the downstream side block 51a in a manner that changes the interval between the upstream side plate 51b and the downstream side block 51a, the width W1 of the gas nozzle 51 can be changed.

[0044] The upstream side plate 51b has a flat plate shape extending in both the width and conveying directions of the electrode sheet 1. The upstream side plate 51b is configured to move along a guide member (not shown) in the conveying direction of the electrode sheet 1. If the upstream side plate 51b is moved downstream in the conveying direction of the electrode sheet 1, the width W1 of the gas nozzle 51 narrows. As a result, the airflow from the gas nozzle 51 decreases, and the air velocity (air pressure) increases. If the upstream side plate 51b is moved upstream in the conveying direction of the electrode sheet 1, the width W1 of the gas nozzle 51 widens. As a result, the airflow from the gas nozzle 51 increases, and the air velocity (air pressure) decreases.

[0045] The gas injection device 50 includes a first drive unit 54 that moves the upstream side plate 51b in the conveying direction of the electrode sheet 1. Here, the first drive unit 54 includes a motor and a ball screw mechanism. However, the structure of the first drive unit 54 is not particularly limited. For example, the first drive unit 54 may also include a motor, pulleys, and a belt.

[0046] The downstream side block 51a is configured with a trapezoidal cross-section and extends in the width direction of the electrode sheet 1. The upper inclined surface 51a1 of the downstream side block 51a forms the downstream sidewall portion of the gas nozzle 51. Figure 1 As shown, the upper inclined surface 51a1 of the downstream side block 51a rises and slopes downstream in the conveying direction of the electrode sheet 1. The upper inclined surface 51a1 of the downstream side block 51a is configured not to be parallel to the upstream side plate 51b. Therefore, the upper inclined surface 51a1 of the downstream side block 51a and the upstream side plate 51b form a nozzle whose width narrows as it approaches the downstream of the conveying direction of the electrode sheet 1. Gas from the gas nozzle 51 is injected into the extending direction of the upper inclined surface 51a1 of the downstream side block 51a. Gas from the gas nozzle 51 is injected downstream and obliquely upward in the conveying direction along the upper inclined surface 51a1 of the downstream side block 51a.

[0047] In this embodiment, the downstream side block 51a is configured to move circumferentially along the convex curved surface 31 of the turning portion 30. Here, the downstream side block 51a moves along the inner circumferential surface of the small diameter portion 32, thereby moving in the transport direction of the electrode sheet 1. In this embodiment, the downstream side block 51a rotates about the center C1 of the turning portion 30. As the downstream side block 51a rotates about the center C1 of the turning portion 30, the width W1 of the gas nozzle 51 and the angle of the upper inclined surface 51a1 relative to the vertical direction change. The gas injection device 50 is configured to be able to adjust the angle of the rectifier plate 57. If the angle of the upper inclined surface 51a1 changes, the blowing direction of the gas from the gas nozzle 51 changes. An arm 55 is connected to the downstream side block 51a, supporting the downstream side block 51a and rotating about the center C1 of the turning portion 30. The arm 55 rotates about the center C1 of the turning portion 30 via a second drive unit 56. The second drive unit 56 includes, for example, a stepper motor or a servo motor capable of controlling the rotation angle. Alternatively, the downstream side block 51a may be configured to change the width of the gas nozzle 51 by moving it in the horizontal direction.

[0048] like Figure 1 As shown, the lower slope 51a2 of the downstream side block 51a slopes downward in the downstream direction of the electrode sheet 1. A rectifier plate 57 is fixed to the lower slope 51a2 of the downstream side block 51a. The rectifier plate 57 is disposed on the downstream side block 51a and moves together with the downstream side block 51a. Here, the rectifier plate 57 rotates and moves with the downstream side block 51a about the center C1 of the turning part 30, changing the angle θ relative to the vertical direction. The rectifier plate 57 extends downstream of the downstream side block 51a in the transport direction of the electrode sheet 1. After extending in a manner that slopes downward in the downstream direction of the transport direction along the extension line of the lower slope 51a2 of the downstream side block 51a, the rectifier plate 57 bends downward. Although not shown in the figure, the rectifier plate 57 extends in the width direction of the electrode sheet 1.

[0049] The rectifier plate 57 forms part of the wall of the gas inlet 57a, which communicates with the gas nozzle 51. Air generated by the blower fan 53 enters the gas inlet 57a formed by the rectifier plate 57 and the rear wall 32c of the small-diameter portion 32, and is ejected from the gas nozzle 51. If the downstream side block 51a is moved downstream in the conveying direction of the electrode sheet 1, the elongation direction of the rectifier plate 57 becomes closer to the vertical direction (angle θ decreases). As a result, the gap between the rectifier plate 57 and the rear wall 32c of the small-diameter portion 32 narrows. That is, the width of the gas inlet 57a formed between the rectifier plate 57 and the rear wall 32c of the small-diameter portion 32 narrows. Consequently, the amount of gas flowing into the gas inlet 57a decreases, and the airflow from the gas nozzle 51 decreases.

[0050] If the downstream side block 51a is moved upstream in the conveying direction of the electrode sheet 1, the elongation direction of the rectifier plate 57 becomes closer to the horizontal direction (angle θ increases). As a result, the width of the gas inlet 57a increases. Consequently, the amount of gas flowing into the gas inlet 57a increases, and the airflow from the gas nozzle 51 increases.

[0051] [Control Diagram]

[0052] Figure 4 This is a block diagram of the sheet conveying device 10. (For example...) Figure 4 As shown, the control device 100 of the sheet conveying device 10 is connected to the gas supply unit 21a and roller drive unit 22a of the first conveying unit 20, the gas supply unit 41a and roller drive unit 42a of the second conveying unit 40, the winding device 60, the air supply fan 53 of the gas injection device 50, the first drive unit 54, and the second drive unit 56, and controls their operation. Furthermore, the control device 100 is connected to the torque detection device 70 and the position detection device 80, and receives signals from them.

[0053] The structure of the control device 100 is not particularly limited. The control device 100 may include, for example, a microcomputer. The microcomputer may also include, for example, an interface (I / F) for receiving data from external devices, a central processing unit (CPU) for executing program commands, a ROM (read-only memory) storing the program executed by the CPU, RAM (random access memory) used as a working area for program expansion, and a memory for storing the aforementioned program and various data.

[0054] like Figure 4 As shown, the control device 100 includes a tension setting unit 101, a tension control unit 102, and an airflow adjustment unit 103. The tension setting unit 101 can set the tension applied to the electrode sheet 1; specifically, it can set the winding torque of the winding device 60. The tension control unit 102, based on the detection results from the torque detection device 70, feeds back and controls the winding torque of the winding device 60 to the set torque.

[0055] The airflow adjustment unit 103 adjusts the width W1 of the gas nozzle 51 in a manner that makes the radial position difference ΔT between the two ends and the center portion of the electrode sheet 1 detected by the position detection device 80 fall within a predetermined range. Here, the airflow adjustment unit 103 performs feedback control on the width W1 of the gas nozzle 51 in the delivery direction in a manner that makes the position difference ΔT close to the predetermined range. In detail, the airflow adjustment unit 103 controls the first drive unit 54 to control the position of the upstream side plate 51b.

[0056] [Control of gas nozzle width]

[0057] The control process for the width W1 of the gas nozzle 51 is described below. Figure 5 This is an example of a flowchart involving the width control of gas nozzle 51. For example... Figure 5 As shown, for the width control of the gas nozzle 51 in one example, in step S01, the radial position difference ΔT between the two ends and the center of the electrode sheet 1 is measured. In step S02, it is determined whether the position difference ΔT between the two ends and the center is above a predetermined lower limit value V1, that is, whether the electrode sheet 1 is drooping below the lower limit. If the difference ΔT is below the lower limit value V1 (if the result of step S02 is no), in step S03, the width W1 of the gas nozzle 51 is increased by a predetermined width. After step S03, the process returns to step S01, and the feedback control is repeated.

[0058] If the result of step S02 is yes (the position difference ΔT between the two ends and the center of the electrode sheet 1 is above the lower limit V1), in step S04, it is determined whether the position difference ΔT between the two ends and the center is below the predetermined upper limit V2, i.e., whether the electrode sheet 1 bulges beyond the upper limit. If the difference ΔT exceeds the upper limit V2 (the result of step S04 is no), in step S05, the width W1 of the gas nozzle 51 is narrowed by a predetermined width. After step S05, the process returns to step S01, and the feedback control is repeated.

[0059] If the result of step S04 is yes (the difference ΔT is below the upper limit V2), the position difference ΔT between the two ends and the center of the electrode sheet 1 is between the lower limit V1 and the upper limit V2, i.e., within a predetermined range. In this case, the width W1 of the gas nozzle 51 remains unchanged. The process returns to step S01, and the feedback control is repeated. When the position difference ΔT between the two ends and the center of the electrode sheet 1 is between the lower limit V1 and the upper limit V2, a gap of at least the lower limit V1 is ensured between the center of the electrode sheet 1 and the small diameter portion 32. Therefore, in this state, the coating portion 3A of the electrode sheet 1 is less likely to come into contact with the small diameter portion 32. Furthermore, in this state, adverse conditions (e.g., stretching of the electrode sheet 1) caused by excessive internal pressure between the small diameter portion 32 and the electrode sheet 1 can also be suppressed.

[0060] If the radial position difference ΔT of the small-diameter portion 32 detected by the position detection device 80 cannot be within a predetermined range due to the position control of the upstream side plate 51b, the angle θ of the rectifier plate 57 (the rotational position of the downstream side block 51a around the center C1) is adjusted. If the vertical position of the center portion of the electrode sheet 1 is still low (the center portion of the electrode sheet 1 droops) even when the upstream side plate 51b is moved to the downstream end, the operator drives the second drive unit 56 to increase the angle θ. If the vertical position of the center portion of the electrode sheet 1 is still high (the center portion of the electrode sheet bulges) even when the upstream side plate 51b is moved to the upstream end, the operator drives the second drive unit 56 to decrease the angle θ. The change of angle θ is implemented, for example, when the specifications of the electrode sheet 1 (e.g., thickness, width, material, etc.) change and the previous feedback control is insufficient to control it.

[0061] Alternatively, as a variation, the width W1 of the gas nozzle 51 and the angle θ of the rectifier plate 57 can also be controlled simultaneously. Figure 6 This is an example of a flowchart involving the control of the width of the gas nozzle 51 and the angle θ of the rectifier plate 57. Figure 6 Steps S11 and S12 are respectively with Figure 5 Steps S01 and S02 are the same. In step S12, if the difference ΔT is lower than the lower limit V1 (if the result of step S12 is negative), in this modified example, in step S13, it is determined whether the width W1 of the gas nozzle 51 has reached its maximum value. If the result of step S13 is negative (if the width W1 of the gas nozzle 51 has not reached its maximum value), in step S14, the width W1 of the gas nozzle 51 is widened to a predetermined width. After step S14, the process returns to step S11.

[0062] If the result of step S13 is yes (the width W1 of the gas nozzle 51 reaches its maximum value), in step S15, the downstream side block 51a and the rectifier plate 57 are rotated by a predetermined angle to increase the angle θ. This increases the airflow of the gas ejected from the gas nozzle 51. After step S15, the process returns to step S11.

[0063] Figure 6 Step S16 and Figure 5 The process is the same as step S04. In step S16, if the difference ΔT exceeds the upper limit value V2 (if the result of step S16 is negative), in step S17, it is determined whether the width W1 of the gas nozzle 51 has reached its minimum value. If the result of step S17 is negative (if the width W1 of the gas nozzle 51 has not reached its minimum value), in step S18, the width W1 of the gas nozzle 51 is narrowed to a predetermined width. After step S18, the process returns to step S11.

[0064] If the result of step S17 is yes (the width W1 of the gas nozzle 51 reaches its minimum value), in step S19, the downstream side block 51a and the rectifier plate 57 are rotated by a predetermined angle to reduce the angle θ. This reduces the airflow of gas ejected from the gas nozzle 51. After step S19, the process returns to step S11. For example, through such control, feedback control can be performed on both the width W1 of the gas nozzle 51 and the width of the gas inlet 57a.

[0065] [Effects of the Implementation Method]

[0066] The effects of the sheet conveying device 10 described in this embodiment will be explained below.

[0067] The sheet conveying device 10 according to this embodiment includes: a first conveying section 20, which conveys a strip-shaped electrode sheet 1 having a coated surface 1A and an uncoated surface 1B on the back side of the coated surface 1A in such a way that the coated surface 1A faces downward; a turning section 30, which has a convex curved surface 31 whose axis extends along the width direction of the electrode sheet 1, is located downstream of the first conveying section 20 in the conveying direction of the electrode sheet 1, and flips the electrode sheet 1 along the convex curved surface 31 such that the coated surface 1A is the inner side; a second conveying section 40, which is located downstream of the turning section 30 in the conveying direction, and conveys the electrode sheet 1 with the uncoated surface 1B facing downward; and a gas injection device 50, which has a gas nozzle 51 located at the boundary between the first conveying section 20 and the turning section 30 and extending along the width direction of the electrode sheet 1, and injects gas from the gas nozzle 51. The gas nozzle 51 is configured to be adjustable in width W1 in the conveying direction.

[0068] Based on this structure, by adjusting the width W1 of the gas nozzle 51, which is related to the conveying direction of the electrode sheet 1, the airflow and velocity of the gas ejected from the gas nozzle 51 can be adjusted. By adjusting the airflow and velocity of the gas ejected from the gas nozzle 51, a sheet conveying device 10 can be made to make it less likely for the electrode sheet 1 to come into contact with the turning part 30.

[0069] In this embodiment, the gas nozzle 51 includes a downstream side block 51a, which constitutes the downstream sidewall portion of the gas nozzle 51; and an upstream side plate 51b, which is disposed upstream of the downstream side block 51a and constitutes the upstream sidewall portion of the gas nozzle 51. The upstream side plate 51b and the downstream side block 51a are each configured to be movable in the conveying direction of the electrode sheet 1. With this structure, the width W1 of the gas nozzle 51 can be changed by moving at least one of the upstream side plate 51b and the downstream side block 51a. Furthermore, any structure that allows at least one of the upstream side plate 51b and the downstream side block 51a to move can change the width W1 of the gas nozzle 51. Any structure that allows the upstream side plate 51b and the downstream side block 51a to move in the conveying direction of the electrode sheet 1 can also change the position of the gas nozzle 51. In this embodiment, by rotating the downstream side block 51a, the downstream side block 51a can be moved in the conveying direction of the electrode sheet 1.

[0070] In this embodiment, the gas injection device 50 includes a flow straightener 57 disposed on the downstream side block 51a and moving together with it. The downstream side block 51a is configured to move circumferentially along the convex surface 31 of the turning portion 30. The flow straightener 57, moving along with the downstream side block 51a, changes its angle θ relative to the vertical direction. The flow straightener 57 forms part of the wall of the gas inlet 57a communicating with the gas nozzle 51. With this structure, by moving the downstream side block 51a along the convex surface 31, the angle θ of the flow straightener 57 can be changed. Therefore, the airflow from the gas nozzle 51 can be adjusted over a wider range, as described above.

[0071] In this embodiment, the convex surface 31 of the steering portion 30 includes: a small-diameter portion 32, which faces the central portion of the electrode sheet 1 in the width direction; and a pair of large-diameter portions 33, which are disposed on both sides of the small-diameter portion 32 in the axial direction and extend radially outward from the small-diameter portion 32, supporting the two ends of the electrode sheet 1 in the width direction. With this structure, by using a pair of large-diameter portions 33 with a diameter larger than the small-diameter portion 32 to support the two ends of the electrode sheet 1 in the width direction, it is possible to prevent the central portion of the electrode sheet 1 in the width direction from contacting the steering portion 30 (here, the small-diameter portion 32). Furthermore, by using the large-diameter portions 33 to support the two ends of the electrode sheet 1 in the width direction, it is possible to suppress the swaying of the electrode sheet 1 caused by the gas ejected by the gas ejection device 50.

[0072] The sheet conveying device 10 according to this embodiment further includes: a position detection device 80, which detects the radial position difference ΔT between the two ends of the electrode sheet 1 supported by a pair of large-diameter portions 33 in the width direction and the center portion in the width direction of the electrode sheet 1; and an airflow adjustment unit 103, which adjusts the width W1 of the conveying direction of the gas nozzle 51 in such a way that the radial position difference ΔT detected by the position detection device 80 is within a predetermined range. With such a sheet conveying device 10, the gap between the center portion in the width direction of the electrode sheet 1 and the small-diameter portion 32 is ensured. As a result, the electrode sheet 1 is less likely to come into contact with the turning portion 30 (specifically, the small-diameter portion 32). Furthermore, the height difference ΔT between the two ends and the center portion of the electrode sheet 1 can be made below a predetermined value, thus suppressing wrinkles in the uncoated portion 4A caused by the height difference ΔT. If the height difference ΔT between the two ends and the center of the electrode sheet 1 is large, the electrode sheet 1 will bend at the stepped portion between the large diameter portion 33 and the small diameter portion 32, which will easily cause wrinkles. Furthermore, it can also suppress adverse conditions (e.g., stretching of the electrode sheet 1) caused by excessive internal pressure between the small diameter portion 32 and the electrode sheet 1.

[0073] In detail, in this embodiment, the airflow adjustment unit 103 performs feedback control on the width W1 of the gas nozzle 51 in the delivery direction so that the radial position difference ΔT detected by the position detection device 80 is close to a predetermined range. With this structure, even in cases of inconsistent conditions such as inconsistent thickness of the electrode sheet 1, the radial position difference ΔT between the two ends and the center portion in the width direction of the electrode sheet 1 can be controlled within a predetermined range.

[0074] [Other Implementation Methods]

[0075] The above describes one embodiment of the sheet conveying device proposed herein. However, the above embodiment is merely an example and can be implemented in other ways. The above embodiments, except where specifically mentioned, do not limit the invention. Furthermore, the technology disclosed herein is capable of various modifications; structural elements and processes mentioned herein can be appropriately omitted or combined without causing particular problems.

[0076] For example, the control range (lower limit V1 and upper limit V2) of the radial position difference ΔT between the two ends and the center of the electrode sheet 1 in the width direction can also be determined according to the tension applied to the electrode sheet 1.

[0077] Figure 7 It is a coordinate graph representing the relationship between the amount of levitation of electrode sheet 1, the tension applied to electrode sheet 1, and whether or not wrinkles are generated in electrode sheet 1. Figure 7The horizontal axis represents the tension applied to electrode sheet 1. Figure 7 The vertical axis represents the buoyancy of electrode sheet 1. A buoyancy of electrode sheet 1 of "0" indicates that ΔT is "0". Figure 7 The points drawn with circles represent points where wrinkles are minimal and there are no problems. Figure 7 The points drawn with triangles represent points where wrinkles are produced at a moderate level. Figure 7 The points marked with an X in the middle represent points where excessive wrinkles occur, indicating a problem.

[0078] The amount of levitation of electrode sheet 1 varies depending on the circumferential position of the small-diameter portion 32. For example, if the airflow from gas nozzle 51 is large, the airflow from gas injection hole 52 of small-diameter portion 32 becomes small, and the amount of levitation of the portion of electrode sheet 1 that is levied by the gas from gas injection hole 52 becomes smaller. Therefore, the target levitation amount of electrode sheet 1 is preferably determined by reference to... Figure 7 The setting is based on the wrinkle formation condition of the electrode sheet 1 as shown. The control range of the target levitation amount of the electrode sheet 1, i.e., ΔT, is based on... Figure 7 The data for the results shown are determined based on the tension applied to electrode sheet 1. For example, the control range of ΔT can also be determined based on the tension applied to electrode sheet 1. Figure 7 The point indicated by the circle in the middle is near the amount of levitation. According to this method of determining the control range of ΔT, wrinkles in the electrode sheet 1 can be suppressed regardless of the tension applied to the electrode sheet 1.

[0079] Furthermore, the control that makes the radial position difference ΔT between the two ends and the center of the electrode sheet 1 in the width direction within a predetermined range is not limited to feedback control. For example, if the width W1 of the gas nozzle 51 that can be made within a specified range by utilizing the function of the sheet conveying device 10 that can adjust the width W1 of the gas nozzle 51, then the width W1 of the gas nozzle 51 can also be fixed.

[0080] The sheet conveying device 10 can also be configured to allow manual adjustment of the width W1 of the gas nozzle 51 and the angle θ of the rectifier plate 57. The adjustment of the width W1 of the gas nozzle 51 and the angle θ of the rectifier plate 57 can also be performed without a drive unit, by adjusting the operator moving the upstream side plate 51b or the downstream side block 51a. Alternatively, the adjustment method of the sheet conveying device 10 may include: a measurement step, in which the radial position difference ΔT between the two ends of the electrode sheet 1 supported by a pair of large-diameter portions 33 in the width direction and the center portion in the width direction of the electrode sheet 1 is measured; and an adjustment step, in which the width W1 of the gas nozzle 51 in the conveying direction is adjusted such that the radial position difference ΔT measured in the measurement step is within a predetermined range. The device for measuring the difference ΔT may also be an external device not installed on the sheet conveying device 10.

[0081] The sheet conveying device is not limited to conveying electrode sheets for energy storage devices; it can also convey other strip-shaped sheets. For example, the small-diameter portion can be an arc shape that is more than or less than a semicircle. The first conveying unit can be configured to convey the sheet downwards from the coating unit, or it can convey the sheet in a direction other than the horizontal direction. The second conveying unit can be configured to convey the sheet upwards from the coating unit, or it can convey the sheet in a direction other than the horizontal direction.

[0082] This specification includes the disclosure of the following statements.

[0083] Item 1: A sheet conveying apparatus comprising: a first conveying section that conveys a strip-shaped sheet having a first surface and a second surface having a back surface of the first surface in a manner with the first surface facing downwards; a turning section having a convex curved surface with an axis extending along the width direction of the sheet and being disposed downstream of the first conveying section in the conveying direction of the sheet, and turning the sheet along the convex curved surface such that the first surface is inwards; a second conveying section being disposed downstream of the turning section in the conveying direction, and conveying the sheet in a manner with the second surface facing downwards; and a spraying device having a gas nozzle disposed at a boundary between the first conveying section and the turning section and extending along the width direction of the sheet, and spraying gas from the gas nozzle, the gas nozzle being configured to adjust the width in the conveying direction.

[0084] Item 2: In the sheet conveying device described in Item 1, the gas nozzle includes: a downstream side member that constitutes a downstream sidewall portion of the gas nozzle; and an upstream side member that is disposed at a position upstream of the downstream side member and constitutes an upstream sidewall portion of the gas nozzle, wherein at least one of the upstream side member and the downstream side member is configured to be movable in the conveying direction.

[0085] Item 3: In the sheet conveying device described in Item 2, the upstream side member and the downstream side member are respectively configured to be movable in the conveying direction.

[0086] Item 4: In the sheet conveying device described in Item 3, the downstream side member is configured to move along the convex surface in the circumferential direction of the convex surface, the jetting device includes a rectifier plate, the rectifier plate is disposed on the downstream side member, and its angle changes relative to the vertical direction as it moves together with the downstream side member, the rectifier plate forming part of the wall of the gas inlet communicating with the gas nozzle.

[0087] Item 5: In any of the sheet conveying devices described in items 1 to 4, the convex surface includes: a small-diameter portion opposite to the central portion in the width direction of the sheet; and a pair of large-diameter portions disposed on both sides of the small-diameter portion in the axial direction, extending radially outward beyond the small-diameter portion, and supporting both ends of the sheet in the width direction.

[0088] Item 6: The sheet conveying device described in Item 5 further includes: a position detection device that detects the radial position difference between the two ends of the sheet supported by the pair of large-diameter portions in the width direction and the center portion of the sheet in the width direction; and an adjustment device that adjusts the width of the gas nozzle in the conveying direction in such a way that the radial position difference detected by the position detection device is within a predetermined range.

[0089] Item 7: In the sheet conveying device described in Item 6, the adjustment device performs feedback control on the width of the conveying direction of the gas nozzle in such a way that the difference in the radial position detected by the position detection device is close to the predetermined range.

[0090] Item 8: The sheet conveying device described in items 6 and 7 further includes a pulling device, which is disposed downstream of the second conveying section in the conveying direction, and pulls the sheet by applying a predetermined tension, the predetermined range being determined according to the tension applied to the sheet.

[0091] Item 9: A method for adjusting a sheet conveying device, the sheet conveying device comprising: a first conveying section that conveys a strip-shaped sheet having a first surface and a second surface having a back surface of the first surface downwards; a deflecting section having a convex curved surface whose axis extends along the width direction of the sheet, and being disposed downstream of the first conveying section in the conveying direction of the sheet, and causing the sheet to flip along the convex curved surface such that the first surface is inwards; a second conveying section being disposed downstream of the deflecting section in the conveying direction, and conveying the sheet downwards with the second surface downwards; and a jetting device having a gas nozzle disposed at the boundary between the first conveying section and the deflecting section, and extending along the width direction of the sheet, and jetting gas nozzle... The nozzle injects gas, and the convex surface includes: a small-diameter portion opposite to the center portion of the sheet in the width direction; and a pair of large-diameter portions disposed on both sides of the small-diameter portion in the axial direction and extending radially outward beyond the small-diameter portion, supporting both ends of the sheet in the width direction. The gas nozzle is configured to adjust the width of the sheet in the conveying direction. The adjustment method of the sheet conveying device includes the following steps: a measurement step, measuring the difference in radial position between the two ends of the sheet in the width direction supported by the pair of large-diameter portions and the center portion of the sheet in the width direction; and an adjustment step, adjusting the width of the gas nozzle in the conveying direction so that the difference in radial position measured by the measurement step is within a predetermined range.

[0092] Item 10: In the adjustment method of the sheet conveying device described in Item 9, the sheet conveying device further includes a pulling device, which is disposed downstream of the second conveying section to pull the sheet, and the predetermined range is determined based on the tension applied to the sheet.

[0093] Item 11: In the adjustment method of the sheet conveying device described in Item 9 or 10, the injection device includes a rectifier plate that forms part of a wall surface of a gas inlet communicating with the gas nozzle, and is configured to adjust the angle of the rectifier plate. The adjustment step includes adjusting the angle of the rectifier plate in such a way that the difference in the radial position measured by the measurement step is within a predetermined range.

Claims

1. A sheet conveying device, characterized in that, have: The first conveying unit conveys a strip-shaped sheet having a first side and a second side having a back side of the first side in such a way that the first side is facing downwards; The turning part has a convex curved surface whose axis extends along the width direction of the sheet, and is located downstream of the first conveying part in the conveying direction of the sheet, and the sheet is flipped along the convex curved surface in such a way that the first surface is inward. The second conveying unit is located downstream of the turning unit in the conveying direction, and conveys the sheet material with the second surface facing downwards. as well as The injection device includes a gas nozzle disposed at the boundary between the first conveying section and the turning section, and extending along the width direction of the sheet, and injects gas from the gas nozzle. The gas nozzle is configured to adjust its width in the delivery direction.

2. The sheet conveying device according to claim 1, characterized in that, The gas nozzle comprises: Downstream component, which constitutes the downstream sidewall portion of the gas nozzle; and An upstream component, positioned upstream of the downstream component, constitutes the upstream sidewall portion of the gas nozzle. At least one of the upstream side member and the downstream side member is configured to be movable in the conveying direction.

3. The sheet conveying device according to claim 2, characterized in that, The upstream side component and the downstream side component are respectively configured to be movable in the conveying direction.

4. The sheet conveying device according to claim 3, characterized in that, The downstream component is configured to move circumferentially along the convex surface. The injection device includes a flow straightener, which is disposed on the downstream component and changes angle relative to the vertical direction as it moves together with the downstream component. The rectifier plate forms part of the wall of the gas inlet that communicates with the gas nozzle.

5. The sheet conveying device according to claim 1, characterized in that, The convex surface includes: The smaller diameter portion is opposite to the central portion in the width direction of the sheet; and A pair of large-diameter portions are disposed on both sides of the small-diameter portion in the axial direction and extend radially outward beyond the small-diameter portion, and support both ends of the sheet in the width direction.

6. The sheet conveying device according to claim 5, characterized in that, It also has: A position detection device that detects the radial position difference between the two ends of the sheet supported by the pair of large-diameter portions in the width direction and the center portion of the sheet in the width direction. as well as An adjustment device that adjusts the width of the gas nozzle in the delivery direction in such a way that the difference in radial position detected by the position detection device is within a predetermined range.

7. The sheet conveying device according to claim 6, characterized in that, The adjustment device provides feedback control over the width of the delivery direction of the gas nozzle in such a way that the radial position difference detected by the position detection device is close to the predetermined range.

8. The sheet conveying device according to claim 6, characterized in that, It also includes a pulling device, which is positioned downstream of the second conveying section in the conveying direction to pull the sheet by applying a predetermined tension. The predetermined range is determined based on the tension applied to the sheet.

9. A method for adjusting a sheet conveying device, the sheet conveying device comprising: The first conveying unit conveys a strip-shaped sheet having a first surface and a second surface having a back surface of the first surface in such a way that the first surface is facing downwards; The turning part has a convex curved surface whose axis extends along the width direction of the sheet, and is located downstream of the first conveying part in the conveying direction of the sheet, and the sheet is flipped along the convex curved surface in such a way that the first surface is inward. The second conveying unit is located downstream of the turning unit in the conveying direction, and conveys the sheet material with the second surface facing downwards. as well as The injection device includes a gas nozzle disposed at the boundary between the first conveying section and the turning section, and extending along the width direction of the sheet, and injects gas from the gas nozzle. The adjustment method of the sheet conveying device is characterized in that... The convex surface includes: The smaller diameter portion is opposite to the central portion in the width direction of the sheet; and A pair of large-diameter portions are disposed on both sides of the small-diameter portion along the axial direction, and extend radially outward beyond the small-diameter portion, supporting both ends of the sheet in the width direction. The gas nozzle is configured to adjust the width of the sheet in the conveying direction. The adjustment method for the sheet conveying device includes the following steps: The measurement step involves measuring the radial position difference between the two ends of the sheet supported by the pair of large-diameter portions in the width direction and the center portion of the sheet in the width direction; and The adjustment step adjusts the width of the gas nozzle's delivery direction in such a way that the radial position difference measured by the measurement step is within a predetermined range.

10. The adjustment method of the sheet conveying device according to claim 9, characterized in that, The sheet conveying device also includes a pulling device, which is positioned downstream of the second conveying section to pull the sheet. The predetermined range is determined based on the tension applied to the sheet.

11. The adjustment method of the sheet conveying device according to claim 9, characterized in that, The injection device includes a flow straightener that forms part of a wall surface of a gas inlet communicating with the gas nozzle, and is configured to allow adjustment of the angle of the flow straightener. The adjustment step includes adjusting the angle of the rectifier plate in such a way that the difference in radial position determined by the measurement step is within a predetermined range.

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