JP2018152240A - Device for conveying electrode material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress generation of wrinkles in the short side direction of a band-shaped metal foil.SOLUTION: Disclosed is a device for conveying an electrode material which includes: a rotating body 43; a rotary shaft 45 for rotating the rotating body 43; and a drive unit for rotating and driving the rotary shaft 45. The rotating body 43 has a cam shape in which the distance from the rotation center to the outer peripheral surface is non-uniform. The outer peripheral surface of the rotating body 43 includes a top part 52 which is most distant from the center of rotation. The top part 52 becomes a part of a contact part 55 in contact with an uncoated part. The top part 52 is provided in a spiral shape along the rotation axis direction.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electrode material conveying apparatus.

  A power storage device such as a lithium ion secondary battery includes positive and negative electrodes. The electrode is manufactured by forming an electrode material having an active material mixture coating portion on both sides of a long strip-shaped metal foil and cutting the electrode material according to the shape of the electrode. The active material mixture is a paste in which an active material, a conductive agent, a solvent, and a binder are mixed.

  The active material mixture is applied, for example, at intervals in the longitudinal direction of the strip-shaped metal foil. The electrode material includes an uncoated portion where the strip-shaped metal foil is exposed between the coated portions arranged in the longitudinal direction of the strip-shaped metal foil.

  For example, Patent Document 1 discloses a transport device that transports this type of electrode material. The conveyance device described in Patent Document 1 includes a pair of belts arranged so as to sandwich the electrode material, and a plurality of contact portions attached to the belts. The interval between adjacent contact portions is the same as the interval between uncoated portions. When the belt rotates, the contact portion mounted on each belt sandwiches the uncoated portion. Then, as the belt rotates, the electrode material sandwiched between the contact portions is conveyed.

Japanese Patent Laid-Open No. 11-138084

  By the way, in the conveying apparatus of electrode material, in order to suppress that a wrinkle arises in strip | belt-shaped metal foil, it conveys, applying a tension | tensile_strength to electrode material. Since tension acts in the longitudinal direction of the strip-shaped metal foil, generation of wrinkles in the longitudinal direction of the strip-shaped metal foil can be suppressed by applying tension to the electrode material. However, it cannot be said that the occurrence of wrinkles in the short direction of the strip-shaped metal foil is sufficiently suppressed.

  An object of the present invention is to provide an electrode material conveying apparatus capable of suppressing the generation of wrinkles in the short direction of a strip-shaped metal foil.

  An electrode material transport device that solves the above problems transports an electrode material having an active material mixture coating portion provided on both sides of a strip metal foil at intervals in the longitudinal direction of the strip metal foil. An electrode material transport device, which is disposed to face the first surface, which is one of both surfaces of the belt-shaped metal foil, and has a rotating body having a contact portion in contact with the belt-shaped metal foil with rotation, A pressure receiving portion that is disposed so as to face a second surface that is opposite to the first surface of both surfaces of the strip-shaped metal foil, and that drives the rotating body to rotate, the pressure receiving portion that sandwiches the contact portion and the strip-shaped metal foil A detection unit that detects an uncoated portion that is a portion between the coated portions on both sides of the strip-shaped metal foil, and a detection result detected by the detection unit, the contact portion and the uncoated portion The drive unit is controlled so that it contacts the work part. A control unit, wherein the rotating body has a cam shape, is a portion of the outer peripheral surface of the rotating body that is the farthest away from the center of rotation of the rotating body, and a top that is a part of the contact portion, It is provided in a spiral shape along the rotational axis direction of the rotating body.

  According to this, when a rotating body rotates, the top part which contacts an uncoated part will change to the transversal direction of a strip | belt-shaped metal foil. Thereby, the force with respect to a transversal direction is added to a strip | belt-shaped metal foil. For this reason, it can suppress that the wrinkle with respect to the transversal direction of strip | belt-shaped metal foil generate | occur | produces during conveyance of electrode material.

About the said conveying apparatus of electrode material, the said rotary body is arrange | positioned so that a rotating shaft may become diagonal with respect to the longitudinal direction of the said strip | belt-shaped metal foil.
According to this, the force applied from the top can be dispersed also in the longitudinal direction of the strip-shaped metal foil, and the force applied from the top can be exerted over a wide range. By causing the force from the top to act also in the longitudinal direction of the strip-shaped metal foil, wrinkles can be further prevented from being generated in the strip-shaped metal foil.

  About the said electrode material conveying apparatus, the said rotary body is comprised by providing several cam-shaped board | plate materials with the same shape seeing from the rotation axis direction, and shifting | deviating and arrange | positioning the said board | plate material to the circumferential direction along a rotating shaft. Has been.

  According to this, the manufacturing cost can be reduced as compared with the case where the rotating body is an integral product.

  According to the present invention, generation of wrinkles in the short direction of the strip-shaped metal foil can be suppressed.

The schematic block diagram which shows the electrode material manufacturing apparatus of embodiment. Sectional drawing which shows the drying apparatus of embodiment. The perspective view which shows the rotary body of embodiment. The top view which shows the rotary body of embodiment. The side view which shows the conveying apparatus of embodiment. The figure which shows typically the relationship between the rotary body and pressure receiving roller in the conveyance mechanism of embodiment. The figure which shows typically the transition of the position of the top part which contacts an uncoated part. The figure which shows typically the relationship between the rotary body and pressure receiving roller in the conveyance mechanism of embodiment.

Hereinafter, an embodiment of an electrode material conveying apparatus will be described.
The electrode material is used for producing positive and negative electrodes used in a power storage device such as a lithium ion secondary battery. The electrode material is obtained by applying an active material mixture to a long strip-shaped metal foil. An electrode can be obtained by cutting the electrode material according to the shape of the electrode.

  As shown in FIG. 1, the electrode material manufacturing apparatus 10 includes a supply device 12 that supplies a long band-shaped metal foil 21 and a winding device 14 that winds the long electrode material 28. The supply device 12 includes a supply reel 13. A strip-shaped metal foil 21 is wound around the supply reel 13. The supply reel 13 rotates to send out the strip-shaped metal foil 21. The winding device 14 includes a winding reel 15. The take-up reel 15 rotates to take up the electrode material 28. The belt-shaped metal foil 21 is conveyed from the supply reel 13 toward the take-up reel 15 by the rotation of the take-up reel 15 and the supply reel 13. The dimension (width) in the short direction of the strip-shaped metal foil 21 is, for example, 100 to 200 mm, and the dimension (length) in the longitudinal direction of the strip-shaped metal foil 21 is, for example, 5000 mm or more. The thickness is, for example, 5 to 30 μm. The strip-shaped metal foil 21 includes a first surface 22 and a second surface 23 that are parallel to each other.

  The electrode material manufacturing apparatus 10 includes a roller 16 and a first coating apparatus 17 downstream of the supply apparatus 12 in the conveyance direction of the strip-shaped metal foil 21. The 1st coating apparatus 17 and the roller 16 are located on both sides of the strip | belt-shaped metal foil 21. As shown in FIG. The first coating device 17 forms an application part 24 on the first surface 22 by applying an active material mixture to the first surface 22 of the strip-shaped metal foil 21. For example, the first coating apparatus 17 applies the active material mixture to the first surface 22 of the strip-shaped metal foil 21 so that the basis weight is 7 mg / cm 2. The first coating device 17 alternately applies the active material mixture and stops application (so-called intermittent coating). Thereby, between the coating parts 24, the uncoated part 25 which the 1st surface 22 of the strip | belt-shaped metal foil 21 exposed is provided. The active material mixture is a mixture of an active material, a conductive agent, a solvent, and a binder.

  The roller 16 functions as a tension roller that applies tension to the belt-shaped metal foil 21. The roller 16 also functions as a die roller that maintains the distance between the strip-shaped metal foil 21 and the first coating device 17.

  The electrode material manufacturing apparatus 10 includes a second coating device 18 downstream of the first coating device 17 in the transport direction of the strip-shaped metal foil 21. The second coating device 18 applies the active material mixture to the second surface 23 of the strip-shaped metal foil 21 so that the basis weight is 7 mg / cm 2, for example. The second coating device 18 forms an application part 26 on the second surface 23 by applying an active material mixture to the second surface 23 of the strip-shaped metal foil 21. The second coating device 18 alternately applies the active material mixture and stops application (so-called intermittent coating). Thereby, between the coating parts 26, the uncoated part 27 which the 2nd surface 23 of the strip | belt-shaped metal foil 21 exposed is provided. The coating unit 26 is provided so as to overlap the coating unit 24. Therefore, in the longitudinal direction of the strip-shaped metal foil 21, the positions of the coated parts 24 and 26 and the positions of the uncoated parts 25 and 27 are the same.

The first coating device 17 and the second coating device 18 produce an electrode material 28 having coating portions 24 and 26 on both sides of the strip-shaped metal foil 21.
The electrode material manufacturing apparatus 10 includes a drying device 30 downstream of the second coating device 18 in the transport direction of the strip-shaped metal foil 21. The drying device 30 dries the coating parts 24 and 26.

  The electrode material manufacturing apparatus 10 includes a pair of tension rollers 19 downstream of the drying apparatus 30 in the transport direction of the strip-shaped metal foil 21. The tension rollers 19 are positioned with the electrode material 28 interposed therebetween, and tension is applied to the electrode material 28.

  The roller 16 and the tension roller 19 are arranged side by side in the horizontal direction. Therefore, the electrode material 28 is conveyed in the horizontal direction between the roller 16 and the tension roller 19. Note that the “horizontal direction” here includes not only the strict sense of the horizontal direction (direction perpendicular to the vertical direction) but also a direction slightly inclined with respect to the horizontal direction. A drying device 30 positioned between the roller 16 and the tension roller 19 in the transport direction of the strip-shaped metal foil 21 dries the coating portions 24 and 26 of the electrode material 28 transported in the horizontal direction. Due to the tension acting from the roller 16 and the tension roller 19, the tension acts on the portion of the electrode material 28 located between the roller 16 and the tension roller 19. Therefore, the electrode material 28 passes through the drying device 30 in a state where tension is applied. In the following description, the direction in which the electrode material 28 is conveyed between the roller 16 and the tension roller 19 is referred to as a conveyance direction X.

  As shown in FIG. 2, the drying device 30 includes a box-shaped storage portion 32 whose inside is a drying chamber 31. The accommodating portion 32 includes an inlet 33 and an outlet 34. The electrode material 28 passes through the drying chamber 31 from the inlet 33 toward the outlet 34. The drying device 30 includes air blowing units 35 on both upper and lower sides, and dries the coating units 24 and 26 by air blowing from the air blowing unit 35.

  In the drying chamber 31, air is blown from both the upper and lower sides in order to dry the coating portions 24 and 26 on both sides of the strip-shaped metal foil 21. At this time, if the electrode material 28 bends due to its own weight or moves up and down due to air blowing, there is a possibility that drying unevenness may occur in the coating parts 24 and 26 or the strip-shaped metal foil 21 may be broken. For this reason, the electrode material manufacturing apparatus 10 includes an electrode material transfer device (hereinafter referred to as a transfer device) 40 in the drying chamber 31, and the electrode material 28 is held and transferred by the transfer device 40.

Moreover, since the coating parts 24 and 26 before drying with the drying apparatus 30 contain a solvent, the conveyance of the electrode material 28 before drying is performed by holding the uncoated parts 25 and 27. .
As shown in FIGS. 2 and 3, the transport apparatus 40 of this embodiment includes three transport mechanisms 41. The three transport mechanisms 41 are provided side by side in the transport direction X. The three transport mechanisms 41 have the same configuration. Each of the transport mechanisms 41 includes a rotating body 43, a pressure receiving roller 44 as a pressure receiving unit, a rotating shaft 45 that rotates the rotating body 43, and a drive unit 46 that rotationally drives the rotating shaft 45. Hereinafter, the transport mechanism 41 will be described.

  As shown in FIGS. 3 and 4, the rotating body 43 has a cam shape in which the distance from the rotation center to the outer peripheral surface is not uniform. The outer peripheral surface of the rotator 43 includes a top 52 that is farthest from the center of rotation. 3 and 4, the top 52 is indicated by a one-dot chain line. The top 52 is gradually shifted in the circumferential direction (rotating direction of the rotating body 43) along the rotating shaft 45 (rotating axis). That is, it can be said that the top 52 is provided in a spiral shape along the rotation axis direction of the rotating body 43. In the present embodiment, the apex 52 has an angle shifted by 90 degrees in the rotation direction of the rotating body 43 from one end to the other end of the rotating body 43 in the rotation axis direction.

  The rotating body 43 includes a plurality of plate members 51. Each plate member 51 has a cam shape, and the shape seen from the direction of the rotation axis (the shape in front view) is the same. The rotating body 43 is configured by connecting plate members 51 along the rotating shaft 45. The outer peripheral surface of each plate member 51 is provided with a top component 53 that is farthest from the rotating shaft 45. By stacking the plate members 51 while being shifted in the circumferential direction along the rotation axis 45, the top component portion 53 of the plate members 51 is shifted in the circumferential direction. And the top part 52 of the rotary body 43 is comprised because the top structure part 53 continues. The rotating body 43 is disposed so that the rotation axis and the longitudinal direction (conveying direction X) of the strip-shaped metal foil 21 intersect obliquely. The rotating body 43 is arranged so that the rotation axis is parallel to the short direction of the strip-shaped metal foil 21.

  The rotating body 43 rotates around the rotation shaft 45, so that a part of the rotating body 43 comes into contact with the uncoated parts 25 and 27, and the rotating body 43 contacts the uncoated parts 25 and 27. The non-contact state is switched. That is, it can be said that the rotating body 43 includes a rotating portion that contacts the uncoated portions 25 and 27 and a rotating portion that does not contact the uncoated portions 25 and 27. In the contact state, of the outer peripheral surface of the rotating body 43, the contact portion 55 that is in contact with the uncoated portions 25 and 27 is slightly separated from the top 52 and the top 52 on both sides of the rotating direction and the counter-rotating direction of the rotating body 43. This is the range up to It can be said that the top 52 constitutes a part of the contact portion 55. The contact portion 55 is also provided in a spiral shape along the rotational axis direction in accordance with the top portion 52. The rotating body 43 of this embodiment includes one contact portion 55. It can be said that the transport device 40 includes one contact portion 55 on the same rotation locus of the rotating body 43.

  The pressure receiving roller 44 is disposed so as to sandwich the portion through which the belt-shaped metal foil 21 passes with the rotating body 43. The pressure receiving roller 44 is a cylindrical roller. It can be said that the pressure receiving roller 44 is arranged in accordance with the arrangement of the rotating body 43. The rotation axis direction of the pressure receiving roller 44 and the rotation axis direction of the rotating body 43 extend in the same direction.

  As shown in FIG. 5, the drive unit 46 includes a motor 61 as a drive unit that rotationally drives the rotary shaft 45, a control unit 62 that controls the motor 61, and a camera (imaging device) 63 as a detection unit. . As the camera 63, for example, a CCD image sensor or the like is used. The camera 63 is disposed upstream of the rotating body 43 in the transport direction X. The camera 63 of the present embodiment is arranged so that the first surface 22 of the strip-shaped metal foil 21 is included in the imaging range. The camera 63 outputs the imaging data to the control unit 62. The control unit 62 recognizes the positions of the coating units 24 and 26 and the uncoated units 25 and 27 based on the imaging data. And the control part 62 drives the motor 61 so that the coating parts 24 and 26 and the rotating body 43 may not contact, while the uncoated parts 25 and 27 and the contact part 55 of each rotating body 43 contact. . For example, the controller 62 determines that the contact portion 55 of the rotating body 43 is uncoated based on the distance between the uncoated portions 25 and 27 (length of the coated portions 24 and 26) and the conveyance speed of the electrode material 28. The motor 61 is controlled so as to come into contact with the work parts 25 and 27.

  When the rotation part 45 of each rotary body 43 rotates and the contact part 55 contacts the uncoated parts 25 and 27, the uncoated parts 25 and 27 are pushed toward the pressure receiving roller 44. The uncoated portions 25 and 27 are sandwiched between the contact portion 55 of the rotating body 43 and the pressure receiving roller 44. Thereby, the rotational force of the rotary body 43 is transmitted to the strip-shaped metal foil 21, and the electrode material 28 is conveyed. In the present embodiment, since there is one contact portion 55 present on the same rotation locus, the contact portion 55 existing on the same rotation locus in the contact state where the contact portion 55 contacts the uncoated portions 25 and 27. Among them, the contact portion 55 that contacts the uncoated portions 25 and 27 is also one. That is, of the contact portions 55 existing on the same rotation locus, there is one contact portion 55 that simultaneously contacts the uncoated portions 25 and 27. The pressure receiving roller 44 may be passively rotated by a force from the rotating body 43 or may be actively rotated by a motor.

  As shown in FIG. 6, in the adjacent transport mechanisms 41, the vertical positions of the rotating body 43 and the pressure receiving roller 44 are reversed. Of the three transport mechanisms 41, the transport mechanisms 41 at both ends are referred to as a first transport mechanism 41A, and the transport mechanism 41 adjacent to the first transport mechanism 41A is referred to as a second transport mechanism 41B. The first transport mechanism 41 </ b> A is disposed such that the rotating body 43 faces the first surface 22 and the pressure receiving roller 44 faces the second surface 23. The second transport mechanism 41 </ b> B is disposed such that the rotating body 43 faces the second surface 23 and the pressure receiving roller 44 faces the first surface 22. The space between the rotating body 43 and the pressure receiving roller 44 is the same in the first transport mechanism 41A and the second transport mechanism 41B.

Next, the operation of the transport device 40 of this embodiment will be described.
As described above, the control unit 62 controls the motor 61 based on the detection result of the camera 63 so that the uncoated portions 25 and 27 and the contact portion 55 come into contact with each other.

  When the rotating body 43 rotates, the contact portion 55 comes into contact with the uncoated portions 25 and 27, and holds and conveys the electrode material 28 by sandwiching the uncoated portions 25 and 27 together with the pressure receiving roller 44. As shown in FIG. 7, the portion A that contacts the uncoated portions 25 and 27 in the top portion 52 transitions in the direction of the rotation axis of the rotating body 43 along with the rotation. Then, the force with respect to the short direction of the strip | belt-shaped metal foil 21 acts on the uncoated parts 25 and 27. FIG. That is, the strip-shaped metal foil 21 is pulled in the short direction, and a force acts in the direction of extending the ridge.

  Moreover, in this embodiment, since the rotating body 43 is disposed so that the rotation axis of the rotating body 43 and the longitudinal direction of the strip-shaped metal foil 21 are obliquely crossed, from the top 52 to the uncoated portions 25 and 27. The applied force is also dispersed in the longitudinal direction of the strip-shaped metal foil 21. Thereby, the force which acts by the contact part 55 is made to act over a wide range.

Moreover, in the conveying apparatus 40 of this embodiment, even if the space | interval of the uncoated parts 25 and 27 changes, the contact part 55 of the rotary body 43 can be automatically made to contact the uncoated parts 25 and 27. FIG. .
If a plurality of contact portions 55 are provided on the rotation locus of each rotating body 43 and a plurality of contact portions 55 existing on the same rotation locus are in contact with a plurality of uncoated portions 25 and 27 at the same time, contact is made. It is necessary to make the interval between the portions 55 coincide with the uncoated portions 25 and 27. Moreover, when the contact part 55 is contacting the some uncoated parts 25 and 27 simultaneously, one of the contact parts 55 is always in contact with the uncoated parts 25 and 27, and the electrode material 28 It is not possible to stop the rotating body 43 or change the rotation speed at an arbitrary timing during the conveyance of.

  On the other hand, in the contact state in which the uncoated portions 25 and 27 are sandwiched between the contact portion 55 and the pressure receiving roller 44 as in the transport device 40 of the present embodiment, the contact portion 55 that exists on the same rotation locus. Among them, when there is one contact portion 55 that contacts the uncoated portions 25 and 27, when the contact portion 55 moves away from the uncoated portions 25 and 27, the uncoated portions 25 and 27 are in contact. The place disappears. For this reason, the rotating body 43 can be stopped at an arbitrary timing. Moreover, if the contact part 55 is not contacting the uncoated parts 25 and 27, the rotational speed of the rotary body 43 can be changed. For this reason, when the space | interval (length of the coating parts 24 and 26) between the uncoated parts 25 and 27 changes, what is necessary is just to change the stop time and rotation speed of the rotary body 43 according to it. That is, if there is one contact portion 55 that simultaneously contacts the uncoated portions 25 and 27 for each rotating body 43, it is not necessary to consider the influence of the other contact portions 55 on the electrode material 28, and The motor 61 can be controlled in accordance with whether or not the contact portion 55 contacts the uncoated portions 25 and 27.

  Further, as shown in FIG. 8, the adjacent transport mechanisms 41 have the rotating body 43 and the pressure receiving roller 44 positioned in the vertical direction reversed. Thereby, when the rotating body 43 of each transport mechanism 41 comes into contact with the uncoated portions 25 and 27, the strip-shaped metal foil 21 is slightly bent with the contact portion 55 as a base point. As a result, tension is applied to the electrode material 28, and wrinkles and bending of the strip-shaped metal foil 21 are suppressed.

Therefore, according to the above embodiment, the following effects can be obtained.
(1) By making the top 52 of the rotating body 43 spiral, a force acts in the short direction of the strip-shaped metal foil 21. For this reason, generation | occurrence | production of the wrinkle with respect to the transversal direction of the strip | belt-shaped metal foil 21 can be suppressed.

  (2) The rotating shaft 45 of the rotating body 43 and the longitudinal direction of the strip-shaped metal foil 21 are obliquely intersected. For this reason, the force applied from the top portion 52 can be dispersed in the longitudinal direction, and the force applied from the top portion 52 can be exerted over a wide range. By the force acting from the top 52, the generation of wrinkles in the longitudinal direction of the strip-shaped metal foil 21 can also be suppressed. Occurrence can also be suppressed.

(3) The rotating body 43 is configured by stacking the plate members 51 while being shifted in the circumferential direction. The manufacturing cost can be reduced as compared with the case where the rotating body 43 is integrated.
(4) The rotating body 43 has a cam shape, and the outer peripheral surface has an arc shape. When the contact portion 55 comes into contact with the uncoated portions 25 and 27 due to the rotation of the rotating body 43, the outer peripheral surface comes into gentle contact. Therefore, the rotating body has a corner on the outer peripheral surface, and the concentration of the load on the uncoated portions 25 and 27 is small as in the case where the corner contacts the uncoated portions 25 and 27. Breakage of the coating portions 25 and 27 can be suppressed.

  (5) Of the contact portions 55 existing on the same rotation locus, only one contact portion 55 is in contact with the uncoated portions 25 and 27 at the same time. For this reason, according to the space | interval of the uncoated parts 25 and 27, the rotation body 43 can be stopped or a rotation speed can be changed. Therefore, even if the interval between the uncoated portions 25 and 27 is changed in order to obtain electrodes having different sizes, the control portion 62 can automatically bring the contact portion 55 into contact with the uncoated portions 25 and 27. .

  (6) When the electrode material 28 moves up and down, this movement is transmitted to the first coating device 17 and the second coating device 18 and may affect the basis weight accuracy. By suppressing the electrode material 28 from moving up and down by the transport device 40, it is possible to suppress deterioration in the basis weight accuracy.

In addition, you may change embodiment as follows.
The rotating body 43 may not be a stack of a plurality of plate members 51, or may be an integral product.

  The rotating body 43 may include a plurality of top portions 52 and contact portions 55. Even in this case, the contact portion 55 that is present on the same rotation locus, that is, the contact portion 55 that is in contact with the uncoated portions 25 and 27 at the same time among the contact portions 55 provided on the same rotating body 43 is provided. By setting it as one, even if the space | interval of the uncoated parts 25 and 27 changes, the control part 62 can make the contact part 55 contact the uncoated parts 25 and 27 automatically.

  A light sensor may be used as a detection unit that detects the uncoated portions 25 and 27. The coating portions 24 and 26 and the uncoated portions 25 and 27 have different reflection modes when receiving light. The uncoated portions 25 and 27 may be detected from the change in the reflection mode.

  A member that moves up and down in a direction facing the uncoated portions 25 and 27 may be used as the pressure receiving portion. In this case, the pressure receiving unit is moved up and down by an actuator controlled by the control unit 62. In this case, the pressure receiving unit does not need to rotate. When the contact part 55 contacts the uncoated parts 25 and 27, the pressure receiving part rises and contacts the uncoated parts 25 and 27. As a result, the uncoated portions 25 and 27 are sandwiched between the contact portion 55 and the pressure receiving portion. When the contact portion 55 does not contact the uncoated portions 25 and 27, the pressure receiving portion is lowered and the pressure receiving portion is separated from the uncoated portions 25 and 27.

In each transport mechanism 41, the vertical position of the rotating body 43 and the pressure receiving roller 44 may be the same.
The number of the transport mechanisms 41 may be singular or two, or may be four or more. When the number is four or more, the first transport mechanisms 41A and the second transport mechanisms 41B may be alternately arranged, or the first transport mechanisms 41A and the second transport mechanisms 41B may be interspersed. Good.

The camera 63 and the control unit 62 may not be provided individually for each transport mechanism 41, and may be shared by the transport devices 40.
The camera 63 may include the second surface 23 in the imaging range. Further, the transport device 40 may include both a camera that images the first surface 22 and a camera that images the second surface 23.

The transport device 40 may be provided between the second coating device 18 and the drying device 30 in the transport direction of the strip-shaped metal foil 21.
The electrode material manufacturing apparatus 10 may include a levitation device in the drying device 30 that levitates the electrode material 28 using ultrasonic waves. In this case, the electrode material 28 is held by both the transfer device 40 and the levitation device.

  The rotating body 43 may be arranged so that the longitudinal direction of the strip-shaped metal foil 21 and the rotation axis are orthogonal.

  DESCRIPTION OF SYMBOLS 21 ... Strip | belt-shaped metal foil, 22 ... 1st surface, 23 ... 2nd surface, 24, 26 ... Coating part, 25, 27 ... Uncoated part, 28 ... Electrode material, 40 ... Conveyance apparatus of electrode material, 43 ... Rotating body 51 ... Plate material 52 ... Top part 55 ... Contact part 61 ... Motor (drive part) 62 ... Control part 63 ... Camera (detection part)

Claims (3)

An electrode material conveying device that conveys an electrode material provided with an active material mixture coating portion provided on both sides of the band-shaped metal foil with a gap in the longitudinal direction of the band-shaped metal foil,
A rotating body that is disposed so as to face the first surface that is one of both surfaces of the strip-shaped metal foil, and has a contact portion that contacts the strip-shaped metal foil with rotation;
A pressure receiving part that is disposed so as to face a second surface that is opposite to the first surface of both surfaces of the strip metal foil, and sandwiches the contact portion and the strip metal foil;
A drive unit for rotating the rotating body;
A detection unit for detecting an uncoated portion that is a portion between the coated portions on both sides of the strip-shaped metal foil,
From the detection result detected by the detection unit, comprising a control unit for controlling the drive unit so that the contact unit and the uncoated unit are in contact,
The rotating body has a cam shape,
The outermost surface of the rotator is a portion that is the furthest away from the rotation center of the rotator, and the top that is a part of the contact portion is provided in a spiral shape along the rotation axis direction of the rotator. The electrode material transfer device.   The said rotary body is a conveying apparatus of the electrode material of Claim 1 arrange | positioned so that a rotation axis may become diagonal with respect to the longitudinal direction of the said strip | belt-shaped metal foil.   The rotary body includes a plurality of cam-shaped plate members having the same shape when viewed from the rotation axis direction, and is configured by shifting the plate members in the circumferential direction along the rotation axis. Item 3. The electrode material conveying apparatus according to Item 2.