Electrode manufacturing apparatus and setting method therefor

Abstract

An electrode manufacturing apparatus according to an embodiment of the present invention may comprise: a pair of rolls arranged in parallel with each other and having a gap therebetween; first bearings rotatably supporting the rolls; second bearings rotatably supporting the rolls while facing the first bearings with respect to the axial direction of the rolls; and a gap adjusting part configured to adjust at least one of a gap between the two first bearings supporting the pair of rolls and a gap between the two second bearings supporting the pair of rolls.

Description

Electrode manufacturing device and its setting method

[0001] Cross-citation with related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2023-0149083, filed November 1, 2023, and Korean Patent Application No. 10-2024-0153688, filed November 1, 2024, the entire contents of which are incorporated herein by reference.

[0003] Technology field

[0004] The present invention relates to an electrode manufacturing device and a setting method for setting the electrode manufacturing device, and more particularly, to an electrode manufacturing device and a setting method thereof that can solve the problem of an increase in the gap between a pair of rolls when rolling an electrode film.

[0005] Secondary batteries are generally manufactured by housing an electrode assembly comprising a cathode, a separator, and an anode in a case such as a cylindrical can or a square pouch.

[0006] The above positive and negative electrodes are each manufactured by applying electrode slurry to both sides (or one side) of electrode foil, which is a current collector. There are various methods for manufacturing the electrode slurry and for adhering it to the electrode foil, but a method of manufacturing the electrode slurry into a thin electrode film, such as a film, and laminating and bonding it has been known.

[0007] At this time, the electrode film and electrode foil are manufactured into an electrode by rolling after bonding or simultaneously with bonding, and subsequent processing is performed to form an electrode tab in the bare portion where the electrode foil is exposed without being covered by the electrode film.

[0008] Meanwhile, a method for manufacturing the electrode film is known to be a powder sheeting process that forms a powder mixture containing active material, carbon material, and binder as main components into a sheet. The powder sheeting process is performed by feeding the powder mixture between sheeting rolls. The mixture fed between the sheeting rolls is formed into a sheet-shaped electrode film by applying pressure and shear force due to the difference in rotational speed between the sheeting rolls.

[0009] After the powder sheeting process, a calendering process is performed to thin the electrode film to the target thickness. The calendering process involves forming the electrode film into a thin film by continuously passing it between adjacent calendering rolls. The process is performed by controlling the gap between adjacent calendering rolls, the rotational speed difference ratio (rotational speed ratio), and the temperature of the calendering rolls.

[0010] Meanwhile, in a manufacturing device in which rolling is performed by passing a workpiece between adjacent rolls, including the above-mentioned seating roll and calendaring roll, there was a problem in which the initially set gap between adjacent rolls gradually increased as the electrode film was rolled.

[0011] This occurs due to the clearance between the 'roll' and the 'hole of the bearing coupled with the roll'. This will be explained in more detail below.

[0012] Fig. 1a is a schematic exploded view of a conventional electrode manufacturing device, and Fig. 1b is a schematic view showing a pair of rolls shown in Fig. 1a rolling an electrode film (E).

[0013] An electrode manufacturing device may include a pair of rolls (10). Referring to FIG. 1A, each roll (10) may include a cylindrical barrel (11) and a neck (12) extending from both ends of the barrel (11) and having a diameter smaller than that of the barrel (11).

[0014] A pair of rolls (10) may be arranged in parallel so that a gap is formed between them. More specifically, the gap may mean a gap between the barrels (11) of the pair of rolls (10).

[0015] And, a bearing (20) may be coupled to each roll (10). The bearing (20) may be provided to support and fix the load of each roll (10) while allowing the roll (10) to rotate.

[0016] Referring to FIG. 1b, the bearing (20) may include a bearing body (21) having an insertion hole (21a) into which a neck (12) of a roll (10) is inserted, and a bearing housing (22) in which the bearing body (21) is mounted. In general, the bearing body (21) may include an inner diameter defining the insertion hole (21a), an outer diameter mounted on the bearing housing (22), and a plurality of rolling members (e.g., balls) provided between the inner diameter and the outer diameter.

[0017] In order for the neck (12) and the bearing (20) to be smoothly combined, it is common for the inner diameter of the insertion hole (21a) formed in the bearing (20) to be larger than the outer diameter of the neck (12).

[0018] However, as illustrated in Fig. 1b, a gap occurs between the insertion hole (21a) of the bearing (20) and the neck (12) of each roll (10), and it may be difficult to maintain a gap between a pair of rolls (10) that is the size of this gap. Accordingly, there was a problem in that the rolling amount of the electrode film (E), which is the workpiece, was not constant, and the thickness, density, and porosity of the electrode film (E) were defective.

[0019] The problem to be solved by the present invention is to provide an electrode manufacturing device and a setting method thereof that can prevent an unintentional increase in the gap between a pair of rolls.

[0020] An electrode manufacturing device according to an embodiment of the present invention may include: a pair of rolls arranged parallel to each other with a gap therebetween; a first bearing that rotatably supports the rolls; a second bearing that faces the first bearing with respect to an axial direction of the rolls and rotatably supports the rolls; and a gap adjusting unit configured to adjust at least one of a gap between the first bearings that support the pair of rolls and a gap between the second bearings that support the pair of rolls.

[0021] The above roll may include a cylindrical barrel extending in the axial direction; and a neck extending from both ends of the barrel and having a diameter smaller than the diameter of the barrel. Each of the first bearing and the second bearing may include a bearing body having an insertion hole into which the neck is inserted; and a bearing housing in which the bearing body is mounted.

[0022] The inner diameter of the insertion hole of the bearing body may be larger than the outer diameter of the neck.

[0023] The above gap adjusting unit may include a first gap adjusting unit that adjusts the gap between the two first bearings; and a second gap adjusting unit that adjusts the gap between the two second bearings.

[0024] The first gap adjusting unit can apply force in a direction to reduce the gap between the two first bearings, and the second gap adjusting unit can apply force in a direction to increase the gap between the two second bearings.

[0025] The first gap adjustment unit may include a piston that pressurizes at least one of the two first bearings so that the gap between the two first bearings is reduced.

[0026] Among the above first bearings, one first bearing is fixed, and the piston can press the other first bearing toward the first first bearing.

[0027] The second gap adjustment unit may include a position adjustment bar that enters between the two second bearings so as to increase the gap between the two second bearings.

[0028] An inclined surface may be formed on at least one of the facing sides of the above-mentioned second bearings, and an inclined sliding surface may be formed on the position adjustment bar so as to be in contact with the inclined surface.

[0029] The above-mentioned slope can be formed in a direction in which the distance between the facing side surfaces of the two second bearings becomes closer as it goes downward.

[0030] The second gap adjustment unit may further include a stopper that limits the position adjustment bar from completely moving out from between the two second bearings.

[0031] The above pair of rolls may have the same size, and the insertion holes of the bearing bodies of each of the first bearing and the second bearing may have the same inner diameter.

[0032] A setting method of an electrode manufacturing device according to an embodiment of the present invention may include the steps of: arranging a pair of rolls in parallel; reducing a gap between two first bearings that rotatably support the pair of rolls to bring the pair of rolls closer; and increasing a gap between two second bearings that face the two first bearings in the axial direction of the rolls to restrict the movement of the pair of rolls.

[0033] In the step of approaching the pair of rolls, the first bearings can move until they come into contact with each other.

[0034] The above first bearings are fixed in contact with each other, and the step of restricting the movement of the pair of rolls can be performed in a state where the above first bearings are fixed.

[0035] In the step of restraining the motion of the above pair of rolls, the second bearings can move to a position where they can no longer move.

[0036] According to a preferred embodiment of the present invention, the gap between a pair of rolls can be precisely set, despite the play occurring between each bearing and the rolls. This allows the electrode film fed between the pair of rolls to be rolled with high and consistent quality.

[0037] In addition to the above effects, various technical effects can be obtained from the composition described in the present invention.

[0038] Figure 1a is a schematic exploded view of a conventional electrode manufacturing device.

[0039] Figure 1b is a schematic diagram showing a pair of rolls shown in Figure 1a rolling an electrode film (E).

[0040] FIG. 2 is an enlarged view of a portion of an electrode manufacturing device according to an embodiment of the present invention.

[0041] Figure 3 is a drawing showing the first bearing shown in Figure 2 with the first bearing removed.

[0042] Figure 4 is a front view of the second bearing and its surroundings shown in Figure 3.

[0043] Figure 5 is a front view of the first bearing and its surroundings shown in Figure 2.

[0044] Figure 6a is a drawing showing the first bearing and the neck of the roll in contact.

[0045] Figure 6b is a drawing showing the second bearing and the neck of the roll in contact.

[0046] Figure 7 is a cross-sectional view showing a state in which the neck of the roll is in contact with the first bearing and the second bearing, respectively, and movement is restricted.

[0047] Hereinafter, the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily practice the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein.

[0048] In order to clearly explain the present invention, parts that are not related to the description are omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0049] In addition, terms and words used in this specification and claims should not be interpreted as limited to their usual or dictionary meanings, but should be interpreted as meanings and concepts that conform to the technical idea of ​​the present invention based on the principle that the inventor can appropriately define the concept of the term to explain his or her own invention in the best way.

[0050] The present invention relates to an electrode manufacturing device and a setting method thereof that can solve conventional problems that occur as a gap between rolls increases due to a play occurring between a bearing and a roll. Hereinafter, embodiments of the present invention will be described in more detail with reference to the attached drawings.

[0051] The present invention provides an electrode manufacturing device as a first embodiment.

[0052] FIG. 2 is an enlarged view of a part of an electrode manufacturing device according to an embodiment of the present invention, FIG. 3 is a view showing the first bearing shown in FIG. 2 with the first bearing removed, FIG. 4 is a view showing the second bearing and its surroundings shown in FIG. 3 as seen from the front, and FIG. 5 is a view showing the first bearing and its surroundings shown in FIG. 2 as seen from the front.

[0053] An electrode manufacturing device according to an embodiment of the present invention may include a pair of rolls (10), a first bearing (30), a second bearing (40), and a gap adjusting unit (50, 60).

[0054] A pair of rolls (10) are arranged parallel to each other and can have a predetermined gap therebetween. Each roll (10) can include a cylindrical barrel (11) extending in the axial direction and a neck (12) extending from both ends of the barrel (11) and having a diameter smaller than the diameter of the barrel (11).

[0055] The first bearing (30) and the second bearing (40) can rotatably support the roll (10). The second bearing (40) can face the first bearing (30) with respect to the axial direction of the roll (10). Hereinafter, as illustrated in FIG. 2, an example will be described in which the second bearing (40) is located inside the first bearing (30) with respect to the axial direction of the roll (10). That is, the first bearing (30) can be referred to as an outer bearing, and the second bearing (40) can be referred to as an inner bearing. In this case, the second bearing (40) and the first bearing (30) can be sequentially fitted into the neck (12) of the roll (10). With respect to the barrel (11), the distance to the first bearing (30) can be longer than the distance to the second bearing (40).

[0056] However, this is not limited to this, and it is also possible for the arrangement of the first bearing (30) and the second bearing (40) to be opposite to each other.

[0057] A first bearing (30) and a second bearing (40) may be provided at both ends of each roll (10). Although only one end of each roll (10) is shown in Fig. 2, those skilled in the art will be able to understand the configuration of the opposite end in the same manner.

[0058] Each bearing (30, 40) may include a bearing body (31, 41) having an insertion hole (31a, 41a) into which a neck (12) of a roll (10) is inserted, and a bearing housing (32, 42) in which the bearing body (31, 41) is mounted. More specifically, the first bearing (30) may include a bearing body (31) having an insertion hole (31a), and a bearing housing (32) in which the bearing body (31) is mounted. Similarly, the second bearing (40) may include a bearing body (41) having an insertion hole (41a), and a bearing housing (42) in which the bearing body (41) is mounted.

[0059] The bearing body (31, 41) may include an inner diameter defining an insertion hole (31a, 41a), an outer diameter mounted on a bearing housing (32, 42), and a plurality of rolling members (e.g., balls) provided between the inner diameter and the outer diameter. The configuration and operation of the bearing body (31, 41) itself are well known, so a detailed description thereof will be omitted.

[0060] The gap adjusting unit (50, 60) may be configured to adjust at least one of the gap between the first bearings (30) supporting a pair of rolls (10) and the gap between the second bearings (40) supporting a pair of rolls (10). More specifically, the gap adjusting unit (50, 60) may adjust the gap between the first bearing (30) provided on one roll (10) and the first bearing (30) provided on the other roll (10), or the gap between the second bearing (40) provided on one roll (10) and the second bearing (40) provided on the other roll (10), or both gaps.

[0061] Meanwhile, the inner diameter of the insertion hole (31a, 41a) of each bearing body (31, 41) may be larger than the outer diameter of the neck (12). That is, a gap may occur between the inner diameter of the insertion hole (31a, 41a) and the outer diameter of the neck (12).

[0062] The neck (12) of each roll (10) can move as much as the clearance that occurs between the first bearing (30) and the second bearing (40). Therefore, the gap adjusting unit (50, 60) can control the movement of a pair of rolls (10) by adjusting the gap between the two first bearings (30) and / or the gap between the two second bearings (40).

[0063] Referring to FIGS. 3 to 5, the gap adjusting unit (50, 60) may include a first gap adjusting unit (50) that adjusts the gap between the two first bearings (30), and a second gap adjusting unit (60) that adjusts the gap between the two second bearings (40).

[0064] The first gap adjusting unit (50) can apply force in a direction to reduce the gap between the two first bearings (30). The second gap adjusting unit (60) can apply force in a direction to increase the gap between the two second bearings (40). Therefore, the gap between a pair of rolls can be precisely adjusted by the first gap adjusting unit (50) and the second gap adjusting unit (60).

[0065] The horizontal double-headed arrows shown in Fig. 5 indicate the spacing between the two first bearings (30). The spacing between the two first bearings (30) may be the spacing between the facing sides (32a) of the bearing housing (32).

[0066] As illustrated in FIG. 5, the first gap adjusting unit (50) may include a piston (50) that pressurizes at least one of the two first bearings (30) so that the gap between the two first bearings (30) is reduced. For convenience of explanation, the first gap adjusting unit (50) and the piston (50) are indicated by the same drawing reference numeral '50'.

[0067] The piston (50) can pressurize the first bearing (30), more specifically, the bearing housing (32) of the first bearing (30).

[0068] For example, one of the first bearings (30) may be fixed, and the piston (50) may press the other first bearing (30) toward the first bearing (30). As another example, the pistons (50) may be provided in pairs, and one piston (50) may press the first first bearing (30) toward the other first bearing (30), and the other piston may press the other first bearing (30) toward the first bearing (30).

[0069] However, the configuration of the first gap adjustment unit (50) is not limited to this, and it may be possible to reduce the gap between the two first bearings (30) by using a different configuration instead of the piston (50).

[0070] The horizontal double-headed arrows shown in Fig. 4 indicate the spacing between the two second bearings (40). The spacing between the two second bearings (40) may be the spacing between the facing sides (42a) of the bearing housing (42).

[0071] As illustrated in Fig. 4, the second gap adjustment unit (60) may include a position adjustment bar (61) that enters between the two second bearings (40) so as to widen the gap between the two second bearings (40). The position adjustment bar (61) may be configured to enable linear movement (e.g., vertically moving up and down).

[0072] An inclined surface (s) may be formed on at least one of the facing sides (42a) of the two second bearings (40), and an inclined sliding surface (ss) may be formed on the position adjustment bar (61) so as to be in contact with the inclined surface (s).

[0073] In more detail, the inclined surface (s) may be formed on only one of the facing side surfaces (42a) of the two second bearings (40), or on both. Here, the inclined sliding surface (ss) of the position adjustment bar (13) may be formed correspondingly according to the position and number of the inclined surfaces (s). Here, the meaning of corresponding means that the inclined sliding surface (ss) and the inclined surface (s) can slide with each other while maintaining surface contact.

[0074] For example, the inclined surface (s) may be formed in a direction in which the distance between the facing side surfaces (42a) of the two second bearings (40) becomes closer as it goes downward. That is, the gap between the two second bearings (40) may decrease as it goes downward due to the inclined surface (s).

[0075] In this case, the position adjustment bar (61) can be lowered from the upper side and enter between the two second bearings (40). In addition, the width of the position adjustment bar (61) can have a shape that decreases as it goes downward.

[0076] Accordingly, as the position adjustment bar (61) descends, the gap between the two second bearings (40) may increase. In addition, when the gap between the two second bearings (40) decreases due to an external force or the like, the position adjustment bar (61) may rise.

[0077] The second gap adjustment unit (60) may further include a stopper (62) that restricts the position adjustment bar (61) from completely moving away from between the two second bearings (40). As described above, when the gap between the two second bearings (40) is reduced due to an external force or the like, the position adjustment bar (61) may rise. At this time, the stopper (62) may limit the rising height of the position adjustment bar (61).

[0078] In this way, a minimum gap between the two second bearings (40) can be secured at a certain level. In other words, the position adjustment bar (61) can be prevented from being completely disengaged thanks to the stopper (62), and the two second bearings (40) can be prevented from coming into contact with each other.

[0079] Meanwhile, a pair of rolls (10) may have the same size. That is, the necks (12) of a pair of rolls (10) may have the same outer diameter. In addition, the insertion holes (31a, 41a) of each of the first bearing (30) and the second bearing (40) may have the same inner diameter. This facilitates the design and manufacture of the electrode manufacturing device, and has the advantage of minimizing variables that must be considered when adjusting the gap between a pair of rolls (10).

[0080] FIG. 6a is a drawing showing the first bearing and the neck of the roll in contact, FIG. 6b is a drawing showing the second bearing and the neck of the roll in contact, and FIG. 7 is a cross-sectional view showing the state in which the neck of the roll is in contact with each of the first bearing and the second bearing and movement is restricted.

[0081] The present invention provides, as a second embodiment, a method for setting up the electrode manufacturing device described above. Accordingly, the above-described content can be appropriately applied to the present embodiment.

[0082] The setting method of the electrode manufacturing device according to the present embodiment may include a step of arranging a pair of rolls (10) in parallel (hereinafter, the 'arrangement step'), a step of reducing the gap between the first bearings (30) that rotatably support the pair of rolls (10) to bring the pair of rolls (10) closer (hereinafter, the 'roll movement step'), and a step of restricting the movement of the pair of rolls (10) by increasing the gap between the second bearings (40) (hereinafter, the 'roll fixing step').

[0083] In the above arrangement step, each roll (10) may be provided with a first bearing (30) and a second bearing (40) mounted thereon. In addition, the barrels (11) of a pair of rolls (10) may be arranged so that a predetermined gap is formed therebetween.

[0084] After the above-described placement step, a roll movement step may be performed. In the above-described roll movement step, referring to FIG. 5, the first gap adjustment unit (50) may move the two first bearings (30) in a direction in which they approach each other.

[0085] For example, the first gap adjusting unit (50) may include a piston (50) that pressurizes at least one of the two first bearings (30) so that the gap between the two first bearings (30) is reduced. During the roll movement step, one of the two first bearings (30) may be fixed, and the piston (50) may pressurize the other.

[0086] During the above-described roll movement step, the two first bearings (30) can move until they come into contact with each other. When the two first bearings (30) come into contact with each other, the two first bearings (30) can be fixed in a state of contact with each other. This fixing can be achieved by a separate fixing device (not shown), or the first gap adjusting member (50) can continuously apply force to the first bearing (30) to maintain the fixing.

[0087] In the above roll fixing step, referring to FIG. 4, the second gap adjusting unit (60) can move the two second bearings (40) away from each other. The roll fixing step can be performed while the two first bearings (30) are fixed. However, this is not limited to this, and the roll movement step and the roll fixing step can also be performed simultaneously.

[0088] For example, the second gap adjustment unit (60) may include a position adjustment bar (61) that enters between the two second bearings (40) so as to increase the gap between the two second bearings (40). During the roll fixing step, the position adjustment bar (61) may be lowered to move the two second bearings (40) away from each other.

[0089] In the above roll fixing step, both second bearings (40) can move to a position where they can no longer move. Here, the 'position where they can no longer move' may be a position where the neck (12) connected to the second bearing (40) can no longer move due to both first bearings (30) being fixed in contact with each other.

[0090] Accordingly, the behavior of a pair of rolls (10) is constrained, and variation of the gap between the pair of rolls (10) can be blocked.

[0091] Referring to Fig. 6a, during the roll movement step, the contact point (A) where the outer circumference of the neck (12) of the roll (10) and the inner circumference of the insertion hole (31a) of the first bearing (30) come into contact with each other can move outward while the two first bearings (30) approach each other. That is, based on Fig. 6a, the contact point (A) can move to the leftmost point among the inner circumferences of the insertion hole (31a).

[0092] To prevent these contact points (A) from changing any further, both first bearings (30) can be kept fixed.

[0093] Referring to Fig. 6b, during the roll fixing step, the contact point (B) where the outer circumference of the neck (12) of the roll (10) and the inner circumference of the insertion hole (41a) of the second bearing (40) come into contact with each other can move inward while the two second bearings (40) move apart. That is, based on Fig. 6b, the contact point (B) can move to the rightmost point among the inner circumferences of the insertion hole (41a).

[0094] To prevent this contact point (B) from changing any further, the second bearing (40) can be moved to a position where it can no longer move.

[0095] As described above, the second gap adjustment unit (60) may further include a stopper (62) that restricts the position adjustment bar (61) from completely moving away from between the two second bearings (40). By the stopper (62), the rising height of the position adjustment bar (61) may be restricted. In particular, since the upper adjustment bar (61) is subjected to upward pressure by an external force, the position adjustment bar (61) may be maintained in contact with the stopper (62). Here, the external force may be a force that acts by the neck (12) of the roll (10) to bring the two second bearings (40) closer to each other.

[0096] Since the position adjustment bar (61) does not completely disengage from between the two second bearings (40), the two second bearings (40) can be fixed in a state where the gap between them is maintained. In addition, as described above, the two first bearings (30) can be fixed in a state where they are in contact with each other.

[0097] When both the first bearings (30) and the second bearings (40) are fixed in this way, as shown in FIG. 7, the neck (12) of each roll (10) can be fixed in movement by contacting the contact point (C) of the first bearing (30) in the direction in which the pair of rolls (10) move away, and can be fixed in movement by contacting the contact point (D) of the second bearing (40) in the direction in which the pair of rolls (10) move closer.

[0098] Accordingly, despite the play occurring between each bearing (30, 40) and the neck (12) of the roll (10), the gap between the pair of rolls (10) can be precisely set. As a result, the electrode film fed between the pair of rolls (10) can be rolled with high and consistent quality.

[0099] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and various embodiments are possible within the scope equivalent to the technical idea of ​​the present invention and the patent claims to be described below by a person having ordinary skill in the art to which the present invention pertains.

[0100] [Explanation of symbols]

[0101] 10: Roll 11: Barrel

[0102] 12: Neck 30: First bearing

[0103] 31: Bearing body (of the first bearing) 31a: Insertion hole (of the first bearing)

[0104] 32: Bearing housing (of the first bearing) 40: Second bearing

[0105] 41: Bearing body (of the second bearing) 41a: Insertion hole (of the second bearing)

[0106] 42: Bearing housing (of the second bearing) 50: First gap adjustment part, piston

[0107] 60: Second gap adjustment part 61: Position adjustment bar

[0108] 62: Stopper

Claims

1. A pair of rolls arranged parallel to each other with a gap between them; A first bearing that rotatably supports the above roll; A second bearing facing the first bearing in the axial direction of the roll and rotatably supporting the roll; and An electrode manufacturing device including a gap adjusting unit configured to adjust at least one of a gap between the first bearings supporting the pair of rolls and a gap between the second bearings supporting the pair of rolls.

2. In paragraph 1, The above roll is, a cylindrical barrel extending axially; and a neck extending from both ends of the barrel and having a diameter smaller than the diameter of the barrel; Each of the first and second bearings above, A bearing body having an insertion hole into which the above neck is inserted; and An electrode manufacturing device including a bearing housing in which the above bearing body is mounted.

3. In paragraph 2, An electrode manufacturing device in which the inner diameter of the insertion hole of the bearing body is larger than the outer diameter of the neck.

4. In paragraph 1, The above spacing adjustment part, A first gap adjusting unit for adjusting the gap between the first bearings; and An electrode manufacturing device including a second gap adjusting unit for adjusting the gap between the above-mentioned second bearings.

5. In paragraph 4, The above first gap adjusting unit applies force in a direction to reduce the gap between the two first bearings, The above second gap adjusting unit is an electrode manufacturing device that applies force in a direction that increases the gap between the two second bearings.

6. In paragraph 4, The above first gap adjustment unit is, An electrode manufacturing device including a piston that pressurizes at least one of the first bearings so that the gap between the first bearings is reduced.

7. In paragraph 6, An electrode manufacturing device in which one of the above first bearings is fixed, and the piston presses the other first bearing toward the first first bearing.

8. In paragraph 4, The above second gap adjustment unit is, An electrode manufacturing device including a position adjustment bar that enters between the two second bearings so as to increase the gap between the two second bearings.

9. In paragraph 8, At least one of the facing sides of the above-mentioned second bearings has an inclined surface formed, An electrode manufacturing device in which an inclined sliding surface is formed on the above position adjustment bar so as to be in contact with the inclined surface.

10. In paragraph 9, An electrode manufacturing device in which the above-mentioned inclined surface is formed in a direction in which the distance between the facing side surfaces of the two second bearings becomes closer as it goes downward.

11. In paragraph 8, The above second gap adjustment unit is, An electrode manufacturing device further comprising a stopper that limits the position adjustment bar from completely moving out from between the two second bearings.

12. In paragraph 2, The above pair of rolls have the same size, An electrode manufacturing device in which the insertion holes of the bearing bodies of the first bearing and the second bearing respectively have the same inner diameter.

13. Step of placing a pair of rolls side by side; A step of reducing the gap between the first bearings that rotatably support the pair of rolls to bring the pair of rolls closer; and A setting method for an electrode manufacturing device, comprising a step of restricting the movement of a pair of rolls by increasing the gap between the two second bearings facing the two first bearings in the axial direction of the rolls.

14. In paragraph 13, A method for setting an electrode manufacturing device in which, in the step of approaching the pair of rolls, the first bearings move until they come into contact with each other.

15. In paragraph 14, The above two first bearings are fixed in contact with each other, A method for setting an electrode manufacturing device, wherein the step of restraining the behavior of the above pair of rolls is performed while the first bearings are fixed.

16. In paragraph 13, A method for setting an electrode manufacturing device in which, in the step of restraining the movement of the above pair of rolls, the second bearing moves to a position where it can no longer move.

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