JP2020035667A - Gravure coating device - Google Patents

Abstract

To provide a gravure coating device which can appropriately transfer paint to an active material layer of a strip electrode.SOLUTION: The gravure coating device includes: a transfer unit 20 which has a pair of gravure rolls 21 which sandwiches a band electrode 70 in a meandering state, to transfer paint F to a specific range of the band electrode 70 in the width direction Y; a moving unit 30, connected to both ends of the pair of gravure rolls 21, which includes a moving body capable of moving the pair of gravure rolls 21 in the width direction Y of the band electrode 70; a measuring unit 40 which confirms the position of an active material layer 72 in the width direction Y of the band electrode 70; and a control unit 50 which moves the moving body on the basis of the position of the active material layer 72 confirmed by the measuring unit 40. If a part of the active material layer 72 is not located within the specific range when the paint F is transferred based on the position of the active material layer 72 confirmed by the measuring unit 40, the control unit 50 moves the moving body so that the active material layer 72 is located within the specific range.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a gravure coating device.

  2. Description of the Related Art Conventionally, there is known a gravure coating apparatus that applies ceramic slurry as a coating material to one surface of a strip-shaped electrode that is transported from upstream to downstream in a transport direction (see Patent Document 1). The gravure coating device includes a gravure roll and a pair of near rolls. The pair of near rolls applies tension to the strip electrodes by pressing the strip electrodes toward the gravure roll. In this state, as the gravure roll rotates, the ceramic slurry inside the storage section is transferred to the surface of the gravure roll, and the ceramic slurry transferred to the surface of the gravure roll is applied to one surface of the strip electrode. Note that the strip-shaped electrode includes an active material layer formed of an active material mixture forming a part of the electrode. The active material layer is covered with the ceramic slurry.

JP 2017-212172 A

  In the above gravure coating apparatus, it is conceivable to apply ceramic slurry to both sides of the strip electrode. In this case, the above gravure coating apparatus uses a pair of gravure rolls. The pair of gravure rolls are provided so as to oppose both surfaces of the strip electrode. By rotating the pair of gravure rolls in this state, the ceramic slurry is applied to both surfaces of the strip electrode.

  Incidentally, there is a possibility that the active material layer of the strip electrode is displaced in the width direction of the strip electrode orthogonal to the transport direction. Therefore, when the ceramic slurry is transferred onto the active material layer, the ceramic slurry may not be transferred onto the active material layer.

  The present invention has been made in view of the problems existing in such conventional techniques, and an object thereof is to provide a gravure coating apparatus capable of appropriately transferring a paint to an active material layer of a strip electrode. It is in.

  A gravure coating apparatus for solving the above-described problem is a gravure coating apparatus that transfers paint to both sides of a strip-shaped electrode transported from upstream to downstream in a transport direction, and to both sides of the strip-shaped electrode, An active material layer that forms a part of the electrode and to which the paint is transferred is provided, and a pair of gravure rolls that sandwich the band-shaped electrode in a meandering state by being provided so as to face each of both surfaces of the band-shaped electrode. A transfer unit that transfers the coating material to a predetermined range in the width direction of the strip electrode orthogonal to the transport direction, and is connected to both ends of the pair of gravure rolls, and connects the pair of gravure rolls to the width of the strip electrode. A moving unit having a moving body capable of moving in a direction, provided upstream of the pair of gravure rolls in the transport direction, and in the width direction of the strip electrode. A measurement unit for confirming the position of the active material layer, and a control unit for moving the moving body based on the position of the active material layer confirmed by the measurement unit, wherein the control unit is configured by the measurement unit If a part of the active material layer does not fall within the prescribed range when the paint is transferred based on the confirmed position of the active material layer, the moving body is moved so that the active material layer falls within the prescribed range. Make it work.

  According to this, when the position of the active material layer in the width direction of the strip electrode is a position outside the specified range of the paint, the position of the pair of gravure rolls in the width direction of the strip electrode can be adjusted by the moving unit. . Therefore, the paint can be appropriately transferred to the active material layer of the strip electrode.

  In the above gravure coating apparatus, the moving unit further includes a linear rail provided so as to extend in a width direction of the band-shaped electrode, and the moving body moves on the linear rail in a width direction of the band-shaped electrode. It may be attached to the linear rail so as to be movable toward it.

When the moving body is moved in the width direction of the strip-shaped electrode, it is considered that the moving body slightly shifts with respect to the moving direction due to the influence of disturbance such as vibration.
According to this, the linear rail is provided so as to extend in the width direction of the strip electrode. Since the moving body is configured to move on the linear rail, the moving body can be more accurately moved in the width direction of the strip electrode.

  ADVANTAGE OF THE INVENTION According to this invention, a coating material can be appropriately transferred to the active material layer of a strip electrode.

The schematic diagram of a gravure coating device. The schematic diagram of the moving part provided in a pair of gravure rolls. The schematic diagram which shows the confirmation method of the position of the active material layer of a strip electrode by a measurement part. FIG. 4 is a schematic diagram showing movement of a first gravure roll in a width direction of a strip electrode. The schematic diagram which showed the movement of the strip | belt-shaped electrode of the 2nd gravure roll to the width direction. The schematic diagram showing the example of change of position detection of the active material layer in a control part.

  Hereinafter, an embodiment of a gravure coating apparatus will be described with reference to FIGS. The gravure coating apparatus of the present embodiment is used in a process of manufacturing an electrode member to be an electrode of a power storage device.

  As shown in FIG. 1, the gravure coating apparatus 1 is an apparatus that transfers a coating material F to both surfaces of a strip electrode 70 that is transported from upstream to downstream in the transport direction X. The band-shaped electrode 70 forms an active material layer precursor by applying an active material paste on both surfaces of the long metal foil 71, and then drying the active material paste, and passing the active material layer precursor through a roll press machine. Is formed by forming an active material layer 72 having a density and thickness. The active material layer 72 is formed in a predetermined range on both surfaces of the strip electrode 70. By forming the active material layer 72 in a predetermined range of the strip electrode 70, the strip electrode 70 has an uncoated portion where the active material layer 72 is not coated. The width of the uncoated portion of the strip electrode 70 is defined in advance. Note that the active material layer 72 has a structure which forms part of an electrode of the power storage device.

  The gravure coating apparatus 1 includes a transport unit 10, a transfer unit 20, and a drying unit 60. The transport unit 10 transports the strip electrode 70 from upstream to downstream in the transport direction X. The transfer unit 20 transfers the paint F to both surfaces of the strip electrode 70. The drying unit 60 dries the paint F transferred to both surfaces of the strip electrode 70.

  The transport unit 10 includes a supply reel 11, a first transport roller 12, a take-up reel 13, and a second transport roller 14. The supply reel 11 is provided upstream in the transport direction X. The supply reel 11 has a band-shaped electrode 70 wound thereon. The supply reel 11 has a function of supplying the wound strip-shaped electrode 70 from upstream to downstream in the transport direction X. The first transport roller 12 transports the band-shaped electrode 70 supplied from the supply reel 11 to the transfer unit 20. The take-up reel 13 takes up an electrode member 75 having a protective layer 73 formed by drying the coating material F transferred to the belt-shaped electrode 70 by the transfer unit 20 by the drying unit 60. The second transport roller 14 supplies the electrode member 75 that has passed through the drying unit 60 to the take-up reel 13.

  The transfer unit 20 includes a pair of gravure rolls 21, a storage unit 22, and a doctor blade 23. The pair of gravure rolls 21 are provided on both sides of the strip electrode 70 so as to face each other. The strip electrode 70 is in a meandering state by being sandwiched between the pair of gravure rolls 21. The storage section 22 is connected to each of the pair of gravure rolls 21. The paint F is stored in the storage unit 22. The doctor blade 23 has a function of scraping off excess paint F attached to the outer peripheral surfaces 21c of the pair of gravure rolls 21. Note that a ceramic slurry is used as the paint F. Each of the pair of gravure rolls 21 has a rotating shaft 24. The respective axes m1 and m2 of the pair of gravure rolls 21 coincide with the axis of the rotating shaft 24. The pair of gravure rolls 21 are rotated in the opposite direction to the transport direction X by motors 25 (see FIG. 2) provided at both ends of the rotating shaft 24. As the pair of gravure rolls 21 rotates, the paint F stored in the storage unit 22 is transferred to the outer peripheral surfaces 21c of the pair of gravure rolls 21. A pair of gravure rolls 21 facing the surface 70a of the strip electrode 70 is referred to as a first gravure roll 21a. A pair of the gravure rolls 21 facing the back surface 70b of the strip electrode 70 is referred to as a second gravure roll 21b. The second gravure roll 21b is located downstream of the first gravure roll 21a in the transport direction X.

  In the gravure coating apparatus 1 configured as described above, the strip-shaped electrode 70 supplied from the supply reel 11 from the upstream to the downstream in the transport direction X is transported toward the transfer unit 20 by the first transport roller 12. The coating material F is transferred by the first gravure roll 21a to the surface 70a of the strip electrode 70 conveyed toward the transfer unit 20. After the paint F is transferred to the front surface 70a of the strip electrode 70 by the first gravure roll 21a, the paint F is transferred to the back face 70b of the strip electrode 70 by the second gravure roll 21b. The band-shaped electrode 70 to which the paint F has been transferred by the transfer unit 20 is conveyed to the drying unit 60 and dries the paint F. The coating layer F is dried to form the protective layer 73, and the electrode member 75 is wound by the winding reel 13 through the second transport roller 14.

  Here, as shown in FIG. 3, the active material layer 72 sets a predetermined range T1 in the width direction Y of the strip electrode 70 orthogonal to the transport direction X with the center position C of the strip electrode 70 as the center. (Indicated by a two-dot chain line). The coating material F is transferred onto the band-shaped electrode 70 with the specified range T2 in the width direction Y of the band-shaped electrode 70 centered on the center position C of the band-shaped electrode 70 as a target position (indicated by a two-dot chain line in FIG. 3). Here, the specified range T2 is set to be larger than the predetermined range T1. Therefore, the paint F is transferred onto the strip electrode 70 so as to overcoat the active material layer 72.

  By the way, the active material layer 72 may be displaced in the width direction Y of the strip electrode 70 when being applied to the long metal foil 71. Specifically, the active material layer 72 applied in a predetermined range on both surfaces of the strip electrode 70 is closer to one end L or the other end R of the strip electrode 70 with reference to the center position C of the strip electrode 70. The position may be shifted so as to move in parallel. When the active material layer 72 is displaced in the width direction Y of the strip electrode 70, the paint F may not be transferred to the active material layer 72 when the paint F is applied, that is, a part of the active material layer 72 The state may not be within the specified range T2 of F.

  Therefore, the gravure coating apparatus 1 of the present embodiment confirms the position of the active material layer 72 in the strip electrode 70, and moves the pair of gravure rolls 21 in the width direction Y of the strip electrode 70 so that the paint F It has a function of containing the active material layer 72 in the specified range T2 to be transferred. To implement the function, the gravure coating apparatus 1 includes a moving unit 30, a measuring unit 40, and a control unit 50. In the present embodiment, the active material layer 72 applied to the front surface 70a of the strip electrode 70 is closer to one end L of the strip electrode 70, and the active material layer 72 applied to the back surface 70b of the strip electrode 70 is closer to the strip. The following description is based on the premise that the electrode 70 is displaced toward the other end R. Note that the distance T1 'shown in FIG. 3 describes an example in which the active material layer 72 does not fall within the specified range T2 of the paint F.

  As shown in FIG. 1, the moving unit 30 has a function of moving the pair of gravure rolls 21 in the width direction Y of the band-shaped electrode 70 (the depth direction in the drawing of FIG. 1 and the front direction of the drawing). The moving unit 30 is provided on each of the pair of gravure rolls 21. The moving unit 30 provided on the first gravure roll 21a passes through the central portion P1 in the region R1 where the first gravure roll 21a and the strip electrode 70 are in contact with each other and the axis m1 of the rotation shaft 24 of the first gravure roll 21a. , Are provided in a direction in which a reference line L1 orthogonal to the width direction Y of the strip electrode 70 extends. The moving unit 30 provided on the second gravure roll 21b passes through a central portion P2 in a region R2 where the second gravure roll 21b and the strip electrode 70 are in contact with each other and the axis m2 of the rotation shaft 24 of the second gravure roll 21b. , The reference line L2 orthogonal to the width direction Y of the strip-shaped electrode 70 is provided in the extending direction.

  The measurement unit 40 is an imaging device for confirming the positions of the active material layer 72 on the front surface 70a and the back surface 70b of the strip electrode 70. The measuring unit 40 is provided upstream of the pair of gravure rolls 21 in the transport direction X. The measuring unit 40 is provided between the supply reel 11 and the first transport roller 12 in the transport direction X. The measuring unit 40 employs, for example, a stereo camera.

  The control unit 50 has a function of moving the pair of gravure rolls 21 in the width direction Y of the strip electrode 70 by operating the moving unit 30 based on the position of the active material layer 72 confirmed by the measuring unit 40. . The control unit 50 captures the imaging data E1 of the surface 70a of the strip electrode 70 from the measurement unit 40. The control unit 50 captures the imaging data E2 of the back surface 70b of the strip electrode 70 from the measurement unit 40. The control unit 50 moves the first gravure roll 21a in the width direction Y of the strip-shaped electrode 70 by operating the moving unit 30 based on the imaging data E1. The control unit 50 moves the second gravure roll 21b in the width direction Y of the strip electrode 70 by operating the moving unit 30 based on the image data E2.

  The moving unit 30 will be described in more detail. Since the configuration of the moving unit 30 provided on the first gravure roll 21a and the second gravure roll 21b is the same, the configuration of the moving unit 30 provided on the first gravure roll 21a will be described as an example. The description of the configuration of the moving unit 30 provided on the gravure roll 21b is omitted.

  As shown in FIG. 2, the moving unit 30 is a linear slider that moves the first gravure roll 21 a in the width direction Y of the strip electrode 70. The moving unit 30 includes a linear rail 31 extending in the width direction Y of the strip electrode 70, a moving body 32 movable on the linear rail 31 in the width direction Y, and a driving source (not shown) for operating the moving body 32. It has. The moving body 32 is configured by integrating an attachment portion 32a and a grip portion 32b. The attachment portion 32a is attached to the linear rail 31 so as to be movable in the width direction Y of the strip electrode 70. The grip portion 32b has a pair of arms 32c extending from the mounting portion 32a toward both ends of the first gravure roll 21a. Motors 25 provided at both ends of the rotating shaft 24 of the first gravure roll 21a are fixed to the distal ends of the pair of arms 32c. Therefore, the moving body 32 moves the first gravure roll 21a in the width direction Y of the strip electrode 70 when the moving body 32 moves on the linear rail 31 in the width direction Y of the strip electrode 70 by the power of the driving source. Is possible.

  As shown in FIG. 3, the measuring unit 40 photographs the active material layer 72 on the surface 70a of the strip electrode 70 at a predetermined cycle. The control unit 50 captures image data E1 of the active material layer 72 on the surface 70a of the strip-shaped electrode 70 photographed by the measurement unit 40. The control unit 50 calculates a distance T1 'from the center position C of the strip electrode 70 to the end of the active material layer 72 near one end L of the strip electrode 70 based on the imaging data E1. The distance T1 'is calculated by the existing distance measurement of the stereo camera. The control unit 50 has a memory (not shown), and stores a distance T2 / 2 that is a half value of the specified range T2. The control unit 50 determines whether or not the distance T1 'is larger than the distance T2 / 2. The control unit 50 captures image data E2 of the active material layer 72 on the back surface 70b of the strip-shaped electrode 70 photographed by the measurement unit 40. The control unit 50 calculates a distance T3 ′ from the center position C of the strip electrode 70 to the end of the active material layer 72 near the other end R of the strip electrode 70 based on the image data E2. The distance T3 'is calculated by the existing distance measurement of the stereo camera. The control unit 50 determines whether or not the distance T3 'is greater than the distance T2 / 2.

Control of the moving unit 30 of the control unit 50 will be described.
As shown in FIG. 4, when the supply of the belt-shaped electrode 70 from the supply reel 11 starts, the control unit 50 acquires the imaging data E1 and E2 from the measurement unit 40. When the control unit 50 determines that the distance T1 ′ is larger than the distance T2 / 2, the control unit 50 determines that the active material layer 72 of the strip electrode 70 is displaced toward one end L of the strip electrode 70, and the paint F Is transferred to the strip electrode 70, it is determined that the active material layer 72 does not fall within the specified range T2 of the paint F. In this case, the control unit 50 controls the moving unit 30 to move the first gravure roll 21a toward one end L of the strip electrode 70 in the width direction Y of the strip electrode 70. The control unit 50 moves the moving body 32 toward one end L of the strip electrode 70 by controlling the drive source of the moving unit 30 to move the first gravure roll 21a toward one end L of the strip electrode 70. . The control unit 50 moves the first gravure roll 21a toward one end L of the strip electrode 70 until the paint F is transferred to the strip electrode 70 supplied from the supply reel 11 and is completely wound on the take-up reel 13. Keep in state.

  When determining that the distance T1 ′ is smaller than the distance T2 / 2, the control unit 50 determines that the active material layer 72 of the strip electrode 70 is displaced toward the other end R of the strip electrode 70. The moving unit 30 is controlled so as to move the first gravure roll 21a toward the other end R of the strip electrode 70 in the width direction Y of the strip electrode 70. Note that the movement of the moving body 32 is the same as that described above, and a description thereof will be omitted. The amount of movement of the moving body 32 on the linear rail 31 is such that when the paint F is transferred to the active material layer 72 transferred to the position of the distance T1 'in the strip electrode 70, the movement of the movable body 32 is within the specified range T2 of the paint F. It is set after experimentally confirming in advance that the material layer 72 will fit. The moving amount of the moving body 32 on the linear rail 31 is set on the assumption that there is no change in the product specifications of the roll press machine, the conveying speed of the strip electrode 70 in the conveying direction X, and the like.

  As illustrated in FIG. 5, when the control unit 50 determines that the distance T3 ′ is greater than the distance T2 / 2, the active material layer 72 of the strip electrode 70 is displaced toward the other end R of the strip electrode 70. It is determined that the active material layer 72 does not fall within the prescribed range T2 of the paint F when the paint F is transferred to the strip electrode 70. Similarly, when determining that the distance T3 ′ is smaller than the distance T2 / 2, the control unit 50 determines that the active material layer 72 of the strip electrode 70 is displaced toward one end L of the strip electrode 70. It is determined that the active material layer 72 does not fall within the prescribed range T2 of the paint F when the paint F is transferred to the strip electrode 70. Note that the movement of the moving body 32 of the moving unit 30 connected to the second gravure roll 21b is the same as the control of the moving unit 30 connected to the first gravure roll 21a, and thus the description is omitted.

Next, the operation of the present embodiment will be described.
Based on the position of the active material layer 72 confirmed by the measurement unit 40, the control unit 50 determines the end of the active material layer 72 closer to one end L or the other end R of the strip electrode 70 from the center position C of the strip electrode 70. Then, the distances T1 'and T3' are calculated. The controller 50 does not transfer the paint F to the active material layer 72 when a portion of the active material layer 72 does not fall within the specified range T2 of the paint F when the paint F is transferred to the strip electrode 70 based on the distance T1 '. The moving body 32 is operated so as to move the first gravure roll 21a toward the portion. When a part of the active material layer 72 does not fall within the specified range T2 of the paint F when the paint F is transferred to the strip electrode 70 based on the distance T3 ′, the control unit 50 sets the paint F on the active material layer 72. The moving body 32 is operated so as to move the second gravure roll 21b toward the portion where the transfer is not performed. Thereby, the control unit 50 moves the pair of gravure rolls 21 in the width direction Y of the strip-shaped electrode 70 so that the active material layer 72 falls within the specified range T2 of the coating material F transferred to the strip-shaped electrode 70.

In the present embodiment, the following effects can be obtained.
(1) In the present embodiment, when the position of the active material layer 72 in the width direction Y of the strip electrode 70 is a position outside the specified range T2 of the paint F, the width direction Y of the pair of gravure rolls 21 Can be adjusted by the moving unit 30. Therefore, the paint F can be appropriately transferred to the active material layer 72 of the strip electrode 70.

(2) When the moving body 32 is moved in the width direction Y of the strip-shaped electrode 70, the moving body 32 may be slightly shifted with respect to the moving direction due to disturbance such as vibration.
In the present embodiment, the linear rail 31 is provided so as to extend in the width direction Y of the strip electrode 70. Since the moving body 32 is configured to move on the linear rail 31, the moving body 32 can be more accurately moved in the width direction of the strip electrode 70.

The present embodiment can be modified and implemented as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
The control unit 50 calculates the distances T1 ′ and T3 ′ based on the image data E1 and E2, but is not limited thereto. For example, an image processing control unit may be provided in the measurement unit 40, and the image processing control unit may calculate the distances T1 'and T3' based on the imaging data E1 and E2. When changed in this way, the control unit 50 acquires the data of the distances T1 ′ and T3 ′, which are the calculation results of the image processing control unit, and sets the pair of gravure rolls 21 on the basis of the acquired data and the distance T2 / 2. The electrode 70 may be moved in the width direction Y.

  制 御 When the distances T1 ′ and T3 ′ are greater than the distance T2 / 2, and when the distances T1 ′ and T3 ′ are smaller than the distance T2 / 2, the control unit 50 determines that the active material layer 72 of the strip electrode 70 Is determined to be outside the specified range T2, but is not limited to this.

  As shown in FIG. 6, for example, the reference position for measuring the distance may be changed from the center position C of the strip electrode 70 to the end of the strip electrode. In this case, the control unit 50 calculates the distance T1 ″ from the end of the strip electrode 70 to the end of the active material layer 72 of the strip electrode 70 on the surface 70a of the strip electrode 70. Similarly, the control unit 50 calculates a distance T3 ″ from the end of the strip electrode 70 to the end of the active material layer 72 of the strip electrode 70 on the back surface 70b of the strip electrode 70. Assuming that the distance in the width direction Y of the strip electrode 70 is the distance D, the distance of the region of the strip electrode 70 where the active material layer 72 is not applied is the distance (D−T2) / 2. That is, when the distances T1 ″ and T3 ″ are greater than the distance (D−T2) / 2, the control unit 50 determines that the distances T1 ″ and T3 ″ are smaller than the distance (D−T2) / 2. At this time, the active material layer 72 may be changed so as to determine that the active material layer 72 does not fall within the specified range T2 of the paint F.

  The moving unit 30 is provided in the direction in which the reference lines L1 and L2 extend, but is not limited to this. For example, it passes through an arbitrary contact point in the regions R1 and R2 where the pair of gravure rolls 21 and the strip-shaped electrode 70 are in contact with the axes m1 and m2 of the pair of gravure rolls 21 and extends in the width direction Y of the strip-shaped electrode 70 May be provided in the direction in which the orthogonal reference line extends.

  The moving body 32 of the moving unit 30 may include a pair of arms 32c and may not include the mounting unit 32a. In this case, the pair of arms 32c may be attached to the linear rail 31 so as to be movable in the width direction Y of the strip electrode 70, and the configuration may be changed to a configuration in which the pair of arms 32c are operated by the power of a driving source.

  The moving body 32 of the moving unit 30 is provided so as to be movable on the linear rail 31, but has, for example, the moving body 32 and moves the pair of gravure rolls 21 in the width direction Y of the band-shaped electrode 70. It is not limited to the one that moves on the linear rail 31 as long as it can be moved.

  The measuring unit 40 may be a monocular camera instead of a stereo camera. When a monocular camera is employed, a memory is provided inside the control unit 50 or in the above-described image processing control unit or the like. The memory stores a plurality of image data obtained by imaging the position of the active material layer 72 in the width direction Y of the strip electrode 70. The plurality of pieces of imaging data stored in the memory include those in which the position of the active material layer 72 falls within the specified range T2 of the paint F, and those that do not. The control unit 50 compares the image data E1 and E2 obtained by imaging the position of the active material layer 72 of the strip-shaped electrode 70 with the measurement unit 40 and the plurality of image data stored in the memory to determine whether the active material layer 72 defines the paint F. It may be determined whether or not the value falls within the range T2. Also, by storing the amount of movement of the moving body 32 for each of the plurality of pieces of imaging data in the memory, the control unit 50 only determines whether or not the active material layer 72 falls within the specified range T2 of the paint F. In addition, the calculation of the moving amount of the moving body 32 can be performed smoothly. The amount of movement of the moving body 32 is not limited to being stored in the memory, and the control unit 50 may appropriately calculate the amount of movement of the moving body 32.

The transport unit 10 may include a supply reel 11 and a take-up reel 13, and may adopt a configuration in which the first transport roller 12 and the second transport roller 14 are omitted.
The transfer unit 20 may include a pair of gravure rolls 21 and a storage unit 22, and may have a configuration in which the doctor blade 23 is omitted.

  帯 The strip-shaped electrode 70 is configured by applying an active material layer 72 to a long metal foil 71. However, the long metal foil 71 may be formed into a woven fabric as long as the active material layer 72 can be applied. Or a net-like sheet.

  DESCRIPTION OF SYMBOLS 1 ... Gravure coating apparatus, 20 ... Transfer part, 21 ... A pair of gravure rolls, 21a ... First gravure roll, 21b ... Second gravure roll, 30 ... Moving part, 31 ... Linear rail, 32 ... Moving body, 40 ... Measuring unit, 50: control unit, 70: strip electrode, 72: active material layer, X: transport direction, Y: width direction of the strip electrode, F: paint, T2: specified range.

Claims (2)

A gravure coating device that transfers paint to both sides of the strip-shaped electrode transported from upstream to downstream in the transport direction,
On both surfaces of the strip-shaped electrode, an active material layer that forms a part of the electrode and to which the paint is transferred is provided,
It has a pair of gravure rolls sandwiching the strip-shaped electrode in a meandering state by being provided so as to be opposed to both surfaces of the strip-shaped electrode, respectively, in a specified range in the width direction of the strip-shaped electrode orthogonal to the transport direction. A transfer unit for transferring paint,
A moving unit having a moving body connected to both ends of the pair of gravure rolls and capable of moving the pair of gravure rolls in the width direction of the band-shaped electrode;
A measurement unit that is provided upstream of the pair of gravure rolls in the transport direction and that checks a position of the active material layer in a width direction of the strip electrode,
A control unit that moves the moving body based on the position of the active material layer confirmed by the measurement unit,
The control unit is configured such that, when a part of the active material layer does not fall within the specified range when the paint is transferred based on the position of the active material layer confirmed by the measurement unit, the active material layer is in the specified range. A gravure coating apparatus, wherein the moving body is operated so as to fall within a range. The moving unit further includes a linear rail provided to extend in a width direction of the band-shaped electrode,
The gravure coating apparatus according to claim 1, wherein the movable body is attached to the linear rail so as to be movable on the linear rail in a width direction of the strip electrode.