JP2018107076A - Conveyance device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conveyance device which prevents a non-coating part of an active material of an electrode from being bent at a sharp angle.SOLUTION: In a conveyance device 100, a roller 40 includes a large diameter part 42 of which the diameter is made larger than that of a main body part 43 pressing a coating part 23 at a position where a non-coating part 24 of an electrode 20 passes in a width direction of a conveyer 30. Such large diameter parts 41 and 42 are brought into contact with the non-coating part 24 in the timing that the coating part 23 is pressed with the main body part 43 of the roller 40 and pressed to the conveyer 30, such that the non-coating part 24 can be made closer to the conveyer 30. When the non-coating part 24 is conveyed to a suction region 35 in such a state, the non-coating part 24 in a desired portion (a region closer to a front end 24a in the embodiment) can be sucked to the conveyer 30, such that the non-coating part 24 can be prevented from being sucked to the conveyer 30 at a sharp angle as shown in Fig. 8.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a transport apparatus.

  Conventionally, what is shown in patent document 1 is known as a conveying apparatus which conveys a sheet-like target object. This conveying device is a device that conveys a sheet while maintaining a high degree of flatness using a conveyor. The conveyor is provided with a suction device, which can adsorb the paper placed on the conveyor. On the upstream side of such a suction region, a gate roller and a paper pressing roller are provided for applying tension to the outside before suction in the suction region.

JP 2009-234781 A

  Here, some conveying apparatuses convey an electrode having a coated part in which an active material layer is formed on a sheet member and an uncoated part from which the sheet member is exposed. Such electrodes have different thicknesses in the coated part where the active material layer is formed and the uncoated part. When the electrode is pressed by the roller of the conveying device as described above, the coated part is pressed toward the conveyor by contacting the roller due to the difference in thickness, but the uncoated part does not contact the roller. Therefore, the uncoated part is conveyed to the adsorption area of the conveyor while being separated from the conveyor. In this case, since the uncoated part is adsorbed by the conveyor in the course, the uncoated part may be bent at an angle close to a right angle near the boundary of the active material, and a crease may be formed. If the uncoated part is creased, there is a possibility that problems in the subsequent process are likely to occur.

  The objective of this invention is providing the conveying apparatus which prevents the uncoated part of the active material of an electrode from bending at a steep angle.

  A conveying device according to one embodiment of the present invention is a conveying device that conveys an electrode having a coated portion in which an active material layer is formed on a sheet member and an uncoated portion where the sheet member is exposed, and adsorbs the electrode A conveyor having a suction area, and a roller arranged on the upstream side of the suction area of the conveyor and pressing the electrode against the conveyor. The roller is an uncoated portion of the electrode in the width direction of the conveyor. Has a large-diameter portion whose diameter is larger than that of the portion that presses the coating portion.

  In such a conveying device, the roller has a large diameter portion whose diameter is larger than a portion pressing the coated portion at a position where the uncoated portion of the electrode passes in the width direction of the conveyor. Such a large-diameter portion can bring the uncoated portion closer to the conveyor side by contacting the uncoated portion at the timing of pressing the coated portion with a roller and pressing it to the conveyor. . When the uncoated part is transported to the adsorption area in this state, the uncoated part can be adsorbed to the conveyor at the desired part, so the uncoated part is adsorbed to the conveyor at a steep angle. Can be prevented. As described above, the uncoated portion of the electrode active material can be prevented from being bent at a steep angle.

  The large diameter portion may sandwich the uncoated portion between the conveyor. Thereby, before the uncoated part is adsorbed, the large-diameter part can bring the desired part of the uncoated part into contact with the conveyor and press it. When the uncoated part reaches the adsorption area in this state, it becomes easy to adsorb the uncoated part to the adsorption area at a desired portion.

  The large diameter portion may guide the uncoated portion so that the uncoated portion is brought close to the conveyor in a state where the uncoated portion is separated from the conveyor.

  The large diameter portion may be formed at a position where the region on the tip side of the uncoated portion passes in the width direction of the conveyor. In this case, the large-diameter portion can be easily adsorbed by bringing the region on the tip side of the uncoated portion closer to the conveyor. Thus, by adsorbing the region on the distal end side before the proximal end side of the uncoated portion, it is possible to prevent the uncoated portion from being bent on the proximal end side.

  A plurality of suction holes may be formed on the conveyor, and the large diameter portion may be formed in a range that completely covers at least one suction hole. In this case, the uncoated portion guided by the large-diameter portion can approach or contact the conveyor in a manner that completely covers at least one suction hole. When the uncoated part reaches the suction region in this state, the suction hole can suck the uncoated part without causing air leakage.

  The large diameter portion may be formed on both ends of the roller. In this case, the process which approaches an uncoated part to a conveyor at two places can be performed.

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent that the uncoated part of the active material of an electrode bends at an acute angle.

It is sectional drawing which shows the inside of the electrical storage apparatus manufactured by applying the conveying apparatus which concerns on embodiment of this invention. It is the II-II sectional view taken on the line of FIG. It is a top view which shows the conveying apparatus which concerns on embodiment of this invention. It is a side view which shows the conveying apparatus which concerns on embodiment of this invention. It is a front view which shows the conveying apparatus which concerns on embodiment of this invention. It is an enlarged view which shows the large diameter part vicinity of a roller. It is a conceptual diagram which shows the relationship between an uncoated part and an adsorption hole. It is an enlarged view of the roller of the conveying apparatus which concerns on a comparative example. It is a top view which shows the conveying apparatus which concerns on a modification.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a cross-sectional view showing the inside of a power storage device manufactured by applying a transfer device according to an embodiment of the present invention. 2 is a cross-sectional view taken along line II-II in FIG. 1 and 2, the power storage device 1 is a lithium ion secondary battery having a stacked electrode assembly.

  The power storage device 1 includes, for example, a substantially rectangular parallelepiped case 2 and an electrode assembly 3 accommodated in the case 2. The case 2 is made of a metal such as aluminum. Although not shown, for example, a non-aqueous (organic solvent) electrolyte is injected into the case 2. On the case 2, the positive terminal 4 and the negative terminal 5 are arranged so as to be separated from each other. The positive terminal 4 is fixed to the case 2 via an insulating ring 6, and the negative terminal 5 is fixed to the case 2 via an insulating ring 7. Although not shown, an insulating film is disposed between the electrode assembly 3 and the inner side surface and bottom surface of the case 2, and the case 2 and the electrode assembly 3 are insulated by the insulating film. Yes. In FIG. 1, for convenience, a slight gap is provided between the lower end of the electrode assembly 3 and the bottom surface of the case 2, but in reality, the lower end of the electrode assembly 3 is located inside the case 2 via an insulating film. Is in contact with the bottom of A gap may be formed between the electrode assembly 3 and the case 2 by arranging a spacer between the electrode assembly 3 and the case 2.

  The electrode assembly 3 has a structure in which a plurality of positive electrodes 8 and a plurality of negative electrodes 9 are alternately stacked via a bag-shaped separator 10. The positive electrode 8 is wrapped in a bag-like separator 10. The positive electrode 8 wrapped in the bag-shaped separator 10 is configured as a positive electrode 11 with a separator. Therefore, the electrode assembly 3 has a structure in which a plurality of separator-attached positive electrodes 11 and a plurality of negative electrodes 9 are alternately stacked. The electrodes located at both ends of the electrode assembly 3 are the negative electrodes 9.

  The positive electrode 8 includes a metal foil 14 that is a positive electrode current collector made of, for example, an aluminum foil, and a positive electrode active material layer 15 formed on both surfaces of the metal foil 14. The metal foil 14 has a foil body portion 14a having a rectangular shape in plan view, and a tab 14b integrated with the foil body portion 14a. The tab 14b protrudes from an edge near one end in the longitudinal direction of the foil body 14a. The tab 14b penetrates the separator 10. The plurality of tabs 14 b extending from the plurality of positive electrodes 8 are connected (welded) to the conductive member 12 in a state of being collected, and are connected to the positive electrode terminal 4 via the conductive member 12. In FIG. 2, the tab 14b is omitted for convenience.

  The positive electrode active material layer 15 is formed on both front and back surfaces of the foil main body portion 14a. The positive electrode active material layer 15 is a porous layer formed including a positive electrode active material and a binder. Examples of the positive electrode active material include composite oxide, metallic lithium, and sulfur. The composite oxide includes, for example, at least one of manganese, nickel, cobalt, and aluminum and lithium.

  The negative electrode 9 includes a metal foil 16 that is a negative electrode current collector made of, for example, copper foil, and negative electrode active material layers 17 formed on both surfaces of the metal foil 16. The metal foil 16 includes a foil body portion 16a having a rectangular shape in plan view and a tab 16b integrated with the foil body portion 16a. The tab 16b protrudes from the edge in the vicinity of one end in the longitudinal direction of the foil body 16a. The tab 16 b is connected to the negative electrode terminal 5 through the conductive member 13. In FIG. 2, the tab 16b is omitted for convenience.

  The negative electrode active material layer 17 is formed on both front and back surfaces of the foil main body portion 16a. The negative electrode active material layer 17 is a porous layer formed including a negative electrode active material and a binder. Examples of the negative electrode active material include carbon such as graphite, highly oriented graphite, mesocarbon microbeads, hard carbon, and soft carbon, alkali metals such as lithium and sodium, metal compounds, SiOx (0.5 ≦ x ≦ 1.5 ) And the like or boron-added carbon.

  The separator 10 has a rectangular shape in plan view. Examples of the material for forming the separator 10 include a porous film made of a polyolefin-based resin such as polyethylene (PE) and polypropylene (PP), or a woven or non-woven fabric made of polypropylene, polyethylene terephthalate (PET), methylcellulose, or the like. .

  When the power storage device 1 configured as described above is manufactured, first, the positive electrode 11 with separator and the negative electrode 9 are manufactured, and then the positive electrode 11 with separator and the negative electrode 9 are alternately stacked, and the positive electrode 11 with separator and the negative electrode 9 are stacked. Is fixed to obtain the electrode assembly 3. Then, the tab 14b of the positive electrode 11 with the separator is connected to the positive electrode terminal 4 through the conductive member 12, and the tab 16b of the negative electrode 9 is connected to the negative electrode terminal 5 through the conductive member 13, and then the electrode assembly 3 is attached to the case. 2 to accommodate.

  Next, the transport apparatus 100 according to the embodiment of the present invention will be described with reference to FIGS. FIG. 3 is a plan view showing the transfer device 100. FIG. 4 is a side view showing the transport apparatus 100. FIG. 5 is a front view showing the transport apparatus 100. In the following description, the object to be transported may be the positive electrode 11 with a separator or the negative electrode 9. Therefore, the object to be transported is an electrode 20 that can include both the poles. The electrode 20 includes a sheet member 21 made of a metal foil, and an active material layer 22 formed by applying an active material mixture on the sheet member 21 and then drying. Among these, a portion where the active material layer 22 is formed on the sheet member 21 is referred to as a coating portion 23, and a portion where the sheet member 21 is exposed is referred to as an uncoated portion 24. The uncoated portion 24 corresponds to the tab 14b or the tab 16b. The transport device 100 is provided on the production line of the power storage device 1, and may be provided, for example, between a device for cutting the electrode 20 and a stacking device for the electrode 20 after the cut. The transport apparatus 100 includes a conveyor 30 that transports the electrode 20 and a roller 40 that presses the electrode 20 against the conveyor.

  The conveyor 30 includes a belt 31 on which the electrode 20 is placed, and rollers 32 and 33 (see FIG. 4) that are provided on both ends of the belt 31 and drive the belt 31. The electrode 20 is placed on the upper surface 34 a of the upper portion 34 between the upper end of the roller 32 and the upper end of the roller 33 of the belt 31 spanned between the roller 32 and the roller 33. When at least one of the rollers 32 and 33 rotates, the belt 31 rotates between the rollers 32 and 33, and the electrode 20 placed on the upper surface 34a is conveyed in the conveying direction D1. The rollers 32 and 33 extend in a horizontal direction orthogonal to the transport direction D1, and this direction is referred to as the “width direction” of the conveyor 30 in the following description.

  On the lower surface side of the upper portion 34 of the belt 31, a suction box for sucking air is disposed, and the suction port 36 is disposed to open upward. A blower 38 is connected to the suction box via a connecting pipe 37 (see FIG. 4). Note that an air chamber may be used instead of the suction box. The belt 31 has a plurality of suction holes 39 (see FIG. 7). With such a configuration, the blower 38 sucks air through the connection pipe 37 and the suction port 36. Therefore, when air is sucked from the suction holes 39, the electrode 20 disposed on the upper surface 34a of the belt 31 is sucked to the upper surface 34a. As described above, the portion corresponding to the suction port 36 in the upper portion 34 of the belt 31 is configured as an adsorption region 35 that adsorbs the electrode 20.

  In the present embodiment, at the time of transport, the pair of electrodes 20 are transported in the width direction with respect to the conveyor 30 (see FIG. 3). Moreover, the uncoated part 24 is arrange | positioned among the electrodes 20 on the outer side in the width direction of the conveyor 30.

  The roller 40 is arranged on the upstream side of the suction region 35 in the conveyor 30 and presses the electrode 20 against the conveyor 30. The roller 40 is disposed at a position separated from the upstream end 35 a of the suction region 35 toward the upstream side. The roller 40 is a columnar member that extends in the width direction of the conveyor 30. The roller 40 is supported by a drive mechanism (not shown) and can move in the vertical direction. The roller 40 can press the electrode 20 against the conveyor 30 and move along the upper surface 34 a of the upper portion 34 of the belt 31 by moving downward before the electrode 20 enters the suction region 35. Thereby, the conveyor 30 can adsorb | suck the electrode 20 to the adsorption | suction area | region 35 in the state which prevented generation | occurrence | production of wrinkles.

  The roller 40 has a main body 43 that presses the coating part 23 of the electrode 20. Further, the roller 40 has large diameter portions 41 and 42 having a diameter larger than that of the main body portion 43 at a position where the uncoated portion 24 of the electrode 20 passes in the width direction of the conveyor 30. Details of the position through which the uncoated portion 24 passes will be described later. In the present embodiment, since the uncoated portion 24 passes through the positions on both ends of the roller 40, the large diameter portions 41 and 42 are formed on both ends of the roller 40.

  Here, with reference to FIG.6 and FIG.7, the structure of the large diameter part 41 is demonstrated in detail. 6 and 7 show only the large-diameter portion 41, but the large-diameter portion 42 also has a configuration having the same meaning, and thus the description thereof is omitted.

  As shown in FIG. 6, the outer peripheral surface 41 a of the large diameter portion 41 is parallel to the outer peripheral surface 43 a (a portion other than the large diameter portions 41 and 42) of the main body portion 43 of the roller 40. The outer peripheral surface 43 a of the main body 43 of the roller 40 and the outer peripheral surface 41 a of the large-diameter portion 41 constitute a cylindrical surface centered on the central axis CL <b> 1 of the roller 40. The large diameter portion 41 has a larger diameter than the main body portion 43.

  FIG. 6 shows the positional relationship between the roller 40, the conveyor 30, and the electrode 20. As shown in FIG. 6A, when the outer peripheral surface 43 a of the main body 43 is located at a position spaced above the electrode 20, the sheet member 21 is positioned between the upper surface 34 a of the conveyor 30 and the lower active material layer. By interposing 22, the upper surface 34 a is separated upward. That is, the uncoated part 24 is in a state of being separated upward from the upper surface 34 a of the conveyor 30. When the roller 40 is lowered from such a state, the outer peripheral surface 43a is in contact with the coating portion 23 of the electrode 20 as shown in FIG. In this state, the large-diameter portion 41 can sandwich the electrode 20 with the conveyor 30 and press the electrode 20 against the conveyor 30. At this time, the large-diameter portion 41 contacts the uncoated portion 24 of the electrode 20 on the outer peripheral surface 41a, and moves the portion of the uncoated portion 24 on the tip 24a side downward. And the large diameter part 41 is moved below until the uncoated part 24 contacts the upper surface 34 a of the conveyor 30. Thereby, as shown in FIG.6 (b), the large diameter part 41 can press the uncoated part 24 to the conveyor 30 side. In this state, the uncoated portion 24 is sandwiched between the upper surface 34 a of the conveyor 30 and the outer peripheral surface 41 a of the large diameter portion 41. At this time, the region on the tip 24 a side of the uncoated portion 24 is attracted to the upper surface 34 a of the conveyor 30. On the other hand, in the uncoated portion 24, the region on the base end (boundary portion with the coated portion 23) side is separated from the upper surface 34 a of the conveyor 30. Even when the electrode 20 is transported by the conveyor 30 and the pressing force by the large-diameter portion 41 is released, the portion on the tip 24a side of the uncoated portion 24 is kept in contact with or close to the upper surface 34a. When the uncoated portion 24 reaches the adsorption region 35 in this state, the region on the tip 24a side that is in contact with or close to the upper surface 34a is adsorbed on the upper surface 34a. As described above, since the region on the distal end 24a side is first attracted and the attracting position is fixed, the proximal end region becomes difficult to bend, so that the region is kept away from the upper surface 34a. That is, even if the uncoated portion 24 is sucked by the upper surface 34a in the suction region 35, the shape of the uncoated portion 24 as shown in FIG. 6B is easily maintained.

  As described above, the diameter of the large-diameter portion 41 is such that the region on the tip 24 a side of the uncoated portion 24 when the coated portion 23 is pressed by the outer peripheral surface 43 a of the main body portion 43. Any dimension that can be brought into contact with the upper surface 34a may be used. In particular, in the form shown in FIG. 6B, when the radius of the outer peripheral surface 41a of the large-diameter portion 41 is larger than the radius of the outer peripheral surface 43a of the main body 43 by the dimension T3, “the thickness T1 of the coating portion 23”. The relation of “≧ dimension T3 ≧ thickness T1 of coated portion 23−thickness T2 of uncoated portion 24” is established.

  Next, the position and size of the large diameter portion 41 in the width direction will be described with reference to FIG. In the example shown in FIG. 7, a plurality of circular suction holes 39 are formed in the conveyor 30, and the suction holes 39 are aligned straight at regular intervals in the transport direction D <b> 1 and the width direction. And However, the arrangement | sequence of the some adsorption | suction hole 39 is not specifically limited, For example, you may arrange | position in zigzag form. Further, the size and quantity of the suction holes 39 are not particularly limited. In FIG. 7, the large diameter portion 41 is indicated by a virtual line.

  The large diameter portion 41 is formed in a region on the tip 24 a side of the uncoated portion 24 in the width direction of the conveyor 30. Here, assuming that the region on the belt 31 corresponding to the large diameter portion 41 is a region E1, the center line CL2 in the width direction is set in the uncoated portion 24 with the region on the tip 24a side of the uncoated portion 24. At this time, it suffices if the region E1 is closer to the tip 24a than the center line CL2 and the region E1 is within the region of the tip 24a. The region E1 may be a region having a length of one third of the dimension in the width direction of the uncoated portion 24 from the tip 24a, or may be in a region having a length of a quarter, Which range is set is not particularly limited. However, it is preferable that the region E1 is disposed at a position near the tip 24a.

  The large diameter portion 41 is formed in the above-described region E1 in the width direction of the conveyor 30 and in a range that completely covers at least one suction hole 39. Note that “completely covering the suction holes” means that the large-diameter portion 41 overlaps the entire area of the suction holes 39 when viewed from above. Here, for explanation, among the rows of the suction holes 39 included in the region E1, the rows of the suction holes 39A, the rows of the suction holes 39B, the rows of the suction holes 39C, and the rows of the suction holes 39D are sequentially arranged from the tip 24a side. It is assumed that it is arranged. Further, in the width direction, a range occupied by the suction holes 39B is a range LA, a range occupied by the suction holes 39B is a range LB, a range occupied by the suction holes 39C is a range LC, and a range occupied by the suction holes 39D is a range LD. For example, if the large-diameter portion 41 is formed in a position and size that overlaps the entire region LA in the width direction, the large-diameter portion 41 is formed in a range that completely covers the suction hole 39. I can say that. In this case, in the width direction, the large-diameter portion 41 is formed in a position / size that overlaps at least one of the entire area of the range LA, the entire area of the range LB, the entire area of the range LC, and the entire area of the range LD. The Accordingly, the large diameter portion 41 is formed in the region E1 in the width direction of the conveyor 30 and in a range that completely covers at least one of the suction holes 39A, 39B, 39C, and 39D. With such a configuration, when the uncoated portion 24 is pressed against the upper surface 34a of the conveyor 30 with the large-diameter portion 41 as shown in FIG. 6B, the uncoated portion 24 is attracted by the suction holes 39A and 39B. , 39C, 39D are pressed against the large diameter portion 41 so as to completely cover at least one of them. Thereby, the suction hole 39 completely covered with the uncoated part 24 can suck the uncoated part 24 in the covered part without causing air leakage when reaching the suction region 35. In the example shown in FIG. 7, the large-diameter portion 41 is formed so as to overlap the ranges LA, LB, and LC, and thus can completely cover the suction holes 39A, 39B, and 39C. Therefore, the uncoated part 24 pressed by the large diameter part 41 is adsorbed by the adsorption holes 39A, 39B, 39C.

  In addition, as shown in FIG. 6B, the large diameter portion 41 has not only a form in which the uncoated portion 24 is sandwiched between the conveyor 30 and the large diameter portion 41 as shown in FIG. Alternatively, the uncoated portion 24 may be guided to a position close to the conveyor 30 while being separated from the conveyor 30. In this embodiment, when the coated portion 23 is pressed by the outer peripheral surface 43a of the main body 43, the uncoated portion 24 contacts both the upper surface 34a of the conveyor 30 and the outer peripheral surface 41a of the large diameter portion 41. It is not in a state to do. However, the region on the tip 24 a side of the uncoated portion 24 is guided toward the upper surface 34 a of the conveyor 30 by being pushed toward the conveyor 30 by the large diameter portion 41. Thus, when reaching the suction region 35, the uncoated portion 24 is sucked together with air through the suction hole 39 (see FIG. 7) of the upper surface 34a, and is sucked onto the upper surface 34a. In this form, a relationship of “thickness T1 of the coated part 23−thickness T2 of the uncoated part 24> dimension T3> thickness T4 of the active material layer 22 on the upper side of the coated part 23” is established.

  Next, operations and effects of the transport apparatus 100 according to the present embodiment will be described.

  First, a transport device according to a comparative example will be described with reference to FIG. The roller 140 of the transport device according to the comparative example does not have the large diameter portion as described above, and has the same diameter as the main body portion 43 even at a position corresponding to the uncoated portion 24. When the electrode 20 is pressed by such an outer peripheral surface 140a of the roller 140, the coated portion 23 is pressed toward the conveyor 30 by contacting the roller 140 due to the difference in thickness, but the uncoated portion 24 is a roller. 140 does not touch. Therefore, as shown in FIG. 8A, the uncoated portion 24 is conveyed to the suction region 35 of the conveyor 30 while being separated from the conveyor 30. In this case, since the uncoated part 24 is adsorbed to the conveyor 30 in the course, the uncoated part 24 bends at an angle close to a right angle near the boundary with the coated part 23 as shown in FIG. A crease may be formed. If a crease is formed in the uncoated portion 24, problems in subsequent processes are likely to occur.

  On the other hand, in the conveying apparatus 100 according to the present embodiment, the roller 40 is from the main body 43 that presses the coating part 23 at a position where the uncoated part 24 of the electrode 20 passes in the width direction of the conveyor 30. Has a large-diameter portion 42 whose diameter is increased. Such large-diameter portions 41 and 42 come into contact with the uncoated portion 24 at the timing when the coated portion 23 is pressed by the main body portion 43 of the roller 40 and pressed against the conveyor 30, so that the uncoated portion The part 24 can be brought close to the conveyor 30 side. When the uncoated portion 24 is conveyed to the suction region 35 in such a state, the uncoated portion 24 is sucked to the conveyor 30 at a desired portion (region on the tip 24a side in the present embodiment). Therefore, it is possible to prevent the uncoated portion 24 from being attracted to the conveyor 30 at a steep angle as shown in FIG. As described above, the uncoated portion 24 of the active material layer 22 of the electrode 20 can be prevented from being bent at a steep angle.

  The large diameter portions 41 and 42 sandwich the uncoated portion 24 with the conveyor 30 (see FIG. 6B). Thereby, before the uncoated part 24 is adsorbed, the large diameter parts 41 and 42 can keep a desired part of the uncoated part 24 in contact with the conveyor 30. When the uncoated part 24 reaches the suction area 35 in this state, the uncoated part 24 is easily attracted to the suction area 35 at a desired portion.

  Further, the large diameter portions 41 and 42 may guide the uncoated portion 24 so as to approach the conveyor 30 in a state where the uncoated portion 24 is separated from the conveyor 30 (see FIG. 6C). ).

  The large diameter portions 41 and 42 are formed in a region E <b> 1 on the tip 24 a side of the uncoated portion 24 in the width direction of the conveyor 30. In this case, the large diameter portions 41 and 42 can make the region E1 on the tip 24a side of the uncoated portion 24 closer to the conveyor 30 and can be easily adsorbed. Thus, by adsorbing the region E1 on the tip 24a side before the base end side of the uncoated portion 24, it is possible to prevent the uncoated portion 24 from being bent at a steep angle on the base end side.

  A plurality of suction holes 39 are formed in the conveyor 30, and the large diameter portions 41 and 42 are formed in a range that completely covers at least one suction hole 39. In this case, the uncoated portion 24 guided by the large diameter portions 41 and 42 can approach or come into contact with the conveyor 30 in such a manner as to completely cover at least one suction hole 39. When the uncoated portion 24 reaches the suction area 35 in this state, the suction holes 39 can suck the uncoated portion 24 without causing air leakage.

  The large diameter portions 41 and 42 are formed on both end sides of the roller 40. In this case, a process of bringing the uncoated part 24 closer to the conveyor 30 at two locations can be performed.

  As mentioned above, although several embodiment of this invention was described, this invention is not limited to the said embodiment.

  For example, in the above-described embodiment, the large-diameter portions 41 and 42 are formed on both ends of the roller 40, but the large-diameter portion 45 may be formed in the central portion of the roller 40 as shown in FIG. . In this case, as shown in FIG. 9, you may arrange | position the uncoated part 24 of a pair of electrode 20 in the center part in the width direction, respectively. Moreover, the large diameter part 45 does not need to be arrange | positioned in the center part, and may be arrange | positioned in the arbitrary positions in the width direction.

  In the above-described embodiment, the roller 40 is supported by the drive mechanism and can move in the vertical direction. However, the roller 40 has a fixed height with respect to the belt 31 and is driven with respect to the conveyance of the electrode. It may rotate. Even in such a structure, when the conveyed electrode comes into contact with the roller 40, the roller 40 rotates, and the large diameter portion 41 guides the uncoated portion 24 toward the belt 31.

  Moreover, in the above-mentioned embodiment, an active material layer is formed by applying an active material mixture on both surfaces of a metal foil that is a current collector and then drying, and a part of the metal foil is not coated. The electrode on which (tab) was formed was described. However, the electrode is not limited to the above-described structure, for example, an uncoated portion may be formed by retrofitting a separate metal foil, and the active material layer forming method is also particularly It is not limited. The electrode body consists of a sheet-like coating part, protrudes from one end of the coating part, and is effective for transporting electrodes with an uncoated part made of metal foil thinner than the coated part, regardless of the structure of the electrode. is there.

  Furthermore, in the said embodiment, although the electrical storage apparatus 1 is a lithium ion secondary battery, this invention is not restricted especially to a lithium ion secondary battery, For example, other secondary batteries, such as a nickel hydride battery, an electric double layer The present invention can also be applied to stacking electrodes in a power storage device such as a capacitor or a lithium ion capacitor.

  DESCRIPTION OF SYMBOLS 20 ... Electrode, 21 ... Sheet member, 22 ... Active material layer, 23 ... Coated part, 24 ... Uncoated part, 24a ... Tip, 30 ... Conveyor, 35 ... Adsorption area | region, 40 ... Roller, 41, 42 ... Large Diameter part, 100 ... conveying device.

Claims (6)

A transporting device for transporting an electrode having a coated part in which an active material layer is formed on a sheet member and an uncoated part from which the sheet member is exposed;
A conveyor having an adsorption area for adsorbing the electrodes;
A roller disposed on the upstream side of the suction area of the conveyor, and a roller for pressing the electrode against the conveyor;
The said roller has a large diameter part by which the diameter was larger than the part which presses the said coating part in the position where the said uncoated part of the said electrode passes in the width direction of the said conveyor.   The said large diameter part is a conveying apparatus of Claim 1 which pinches | interposes the said uncoated part between the said conveyors.   The conveying device according to claim 1, wherein the large-diameter portion guides the uncoated portion so as to approach the conveyor in a state where the uncoated portion is separated from the conveyor.   The said large diameter part is a conveying apparatus as described in any one of Claims 1-3 currently formed in the position through which the area | region of the front end side of the said uncoated part passes in the width direction of the said conveyor. The conveyor has a plurality of suction holes,
The conveying device according to any one of claims 1 to 4, wherein the large-diameter portion is formed in a range that completely covers at least one of the suction holes.   The conveying device according to any one of claims 1 to 5, wherein the large-diameter portion is formed on both ends of the roller.