JP6691289B2 - Roll press machine - Google Patents

Description

  The present invention relates to a roll pressing device provided with a pair of press rolls, and more particularly to a roll pressing device provided with a scraper for removing deposits as foreign matter attached to the roll surface.

  As a conventional roll pressing device, for example, an electrode roll pressing device 90 shown in FIG. 5 is known. The electrode roll press device 90 shown in FIG. 5 includes a pair of press rolls 91 and 92 that are relatively rotated. A predetermined gap is provided between the press rolls 91 and 92, and the electrode sheet 93 having the active material layers 95 and 96 on both surfaces of the strip-shaped metal foil 94 is passed through the gap between the press rolls 91 and 92. As a result, the electrode sheet 93 is pressed while being conveyed.

  In pressing the electrode sheet 93 by the press rolls 91 and 92, the electrode sheet 93 is pressed while being continuously conveyed between the pair of press rolls 91 and 92. At this time, as the electrode sheet 93 is continuously pressed, a part of the active material in the active material layers 95 and 96 of the electrode sheet 93 may adhere to the surfaces of the press rolls 91 and 92 as a foreign substance G. When the foreign matter G adheres to the surfaces of the press rolls 91 and 92 for applying pressure, the active material layers 95 and 96 are pressurized while the foreign matter G remains adhered, and the active material layers 95 and 96 to be pressed have concave portions or A convex portion is generated. When the active material layers 95 and 96 have concave portions or convex portions, it becomes difficult to maintain the quality of the electrode sheet 93. Particularly, in the case of a lithium ion secondary battery, if a convex portion is formed on the active material layers 95 and 96 of the electrode sheet 93 that serves as a positive electrode, it may cause lithium deposition. Therefore, the scrapers 97 and 98 contacting the surfaces of the press rolls 91 and 92 are used to remove the foreign matter G attached to the surfaces of the press rolls 91 and 92. Although not shown, the scrapers 97 and 98 are held by a holder member.

  As another conventional technique related to the roll press device, for example, there is a cleaning device disclosed in Patent Document 1, an image forming method using the cleaning device, and an image forming device. The cleaning device disclosed in Patent Document 1 includes a cleaning roller having a conductive or semi-conductive elastic body that comes into contact with the surface of a photoconductor, and a cleaning roller disposed downstream of the cleaning roller in the moving direction of the photoconductor. It has a blade. The cleaning blade is held by a supporting member in close contact with the metal thin plate member on the surface opposite to the surface contacting the photoconductor, and the free length a of the cleaning blade and the free length b of the metal thin plate member are 0.1. It is designed to satisfy <b / a ≦ 0.9.

JP, 2003-29591, A

However, in the case of the conventional technique shown in FIG. 5, when the scraper is brought into sliding contact with the surface of the press roll, the vibration caused by the friction between the scraper and the press roll causes an unpleasant and unpleasant high-frequency noise to continue to be generated. There is.
On the other hand, in the cleaning device disclosed in Patent Document 1, when the free length a of the cleaning blade and the free length b of the thin metal plate member are b / a> 0.9, the tip of the cleaning blade rotates the cleaning roller. There is a problem that the blade is turned up due to being drawn into.

  The present invention has been made in view of the above problems, and an object of the present invention is to prevent generation of abnormal noise of high frequency which is unpleasant and unpleasant, and the scraper length A and the effective length B of the holder member. However, even if B / A> 0.9, it is to provide a roll press device in which the scraper functions normally without the blade being turned up.

In order to solve the above problems, the present invention is a pair of press rolls that rotate relative to each other, a scraper that is in close contact with the roll surface of at least one of the pair of press rolls, and a holder that holds the scraper. In a roll press device comprising a member and an urging member that applies an urging force that brings the scraper into close contact with the roll surface, to the holder member, one surface on which the scraper of the holder member is abutted, A concave portion is formed, and an elastic member having a function of applying a biasing force to the scraper is arranged in the concave portion, and the tip of the scraper is biased toward the holder tip of the holder member by the elastic member. , and the holder member in the scraper and surface abutting the opposite face is in close contact with the roll surface, of the scraper When the scraper length from the end to the tip on the roll surface is A, and the holder member effective length from the reference position corresponding to the base end of the scraper in the holder member to the holder tip of the holder member is B, Conditional expression: It is characterized by satisfying 0.9 <B / A <1.

In the present invention, when the scraper length A and the holder member effective length B are satisfied, the conditional expression 0.9 <B / A is satisfied, so that the holder member holds the scraper up to the vicinity of the tip near the roll surface of the scraper. The elastic member applies an urging force to the scraper, and the holder member holds the scraper up to the vicinity of the tip of the scraper, so that the vibration caused by the friction between the scraper and the roll surface is suppressed, which is unpleasant due to the annoyance caused by the vibration. No high frequency noise is generated. Further, even if the length A of the scraper and the effective length B of the holder member are 0.9 <B / A <1.0, the scraper does not curl and the scraper functions normally.

Further, in the above roll press device, the holder member may be configured to have a thickness that decreases from the reference position toward the tip of the holder.
In this case, since the thickness of the holder member decreases from the reference position toward the tip of the holder, it is possible to cause the scraper to appropriately bend to perform the function as the scraper. In addition, the tip of the holder of the holder member does not easily interfere with the roll surface.

Further, in the above roll pressing apparatus, the holder member and the scraper may be in surface contact with each other.
In this case, the scraper can be stably held by the holder member as compared with the case where the scraper is held by the holder member by surface contact and the scraper is held by the scraper by line contact.

Further, in the above roll pressing apparatus, the holder member and the scraper may be in line contact with each other at a plurality of points.
In this case, even when the scraper is held by the line contact with the holder member at a plurality of positions, it is possible to appropriately bend the scraper to perform the function as the scraper.

  According to the present invention, it is possible to prevent the generation of an unpleasant and unpleasant high-frequency noise, and even if the scraper length A and the effective length B of the holder member are B / A> 0.9, the blade is turned up. Thus, it is possible to provide a roll press device in which the scraper functions normally.

It is a side view which shows the outline of the roll press apparatus which concerns on 1st Embodiment. It is a side view which shows the scraper mechanism of an upper press roll. It is a side view which shows the scraper mechanism of the lower press roll. It is a side view which shows the principal part of the roll press apparatus which concerns on 2nd Embodiment. It is a side view which shows the outline of the conventional roll press apparatus.

(First embodiment)
Hereinafter, the roll press device according to the first embodiment will be described with reference to the drawings. The roll pressing device of the present embodiment is an electrode roll pressing device, and the electrode roll pressing device is a part of manufacturing equipment for manufacturing an electrode used for an electrode assembly included in a lithium ion secondary battery. The electrode assembly has a positive electrode and a negative electrode as electrodes, and a separator interposed between the positive electrode and the negative electrode. In the present embodiment, an electrode roll pressing apparatus that pressurizes an electrode sheet that is a precursor of a positive electrode when manufacturing a positive electrode as an electrode will be described.

First, the electrode sheet 11 as a press target to be pressed by the electrode roll pressing device 10 shown in FIG. 1 will be described. The electrode sheet 11 of the present embodiment includes a positive electrode metal foil 12 which is a strip-shaped metal foil, and active material layers 13 and 14 formed by applying a coating material containing an active material on both surfaces of the positive electrode metal foil 12. Is equipped with. The active material layers 13 and 14 are formed of the same material, and the coating material forming the active material layers 13 and 14 is mainly the active material, and contains a binder in addition to the active material. The active material layer 13 is located on the upper surface of the positive electrode metal foil 12 when the electrode sheet 11 is conveyed horizontally, and the active material layer 14 is located on the lower surface of the positive electrode metal foil 12. The active material layers 13 and 14 of the electrode sheet 11 are formed at regular intervals in the longitudinal direction of the electrode sheet 11. The electrode sheet 11 is dried after the active material layers 13 and 14 are formed, and is wound around the winding roll 15.

  As shown in FIG. 1, the electrode sheet 11 delivered from the take-up roll 15 is horizontally conveyed, pressed by the electrode roll press device 10, and taken up by the take-up roll 16. The electrode roll pressing device 10 is provided so as to be located between the winding rolls 15 and 16. A rotary drive source (not shown) for rotating the winding rolls 15 and 16 is provided, respectively.

  The electrode roll press device 10 includes a pair of press rolls 17 and 18. The press rolls 17 and 18 are made of a metal material and have the same structure with the same diameter. The press roll 17 is an upper press roll, and the press roll 17 has a roll surface 19 which is a pressing surface. The press roll 18 is a lower press roll, and the press roll 17 has a roll surface 20 which is a pressing surface. A roll gap T is provided between the upper and lower press rolls 17 and 18. The roll gap T is set to the thickness of the electrode sheet 11 after pressing. The lowest point of the press roll 17 and the highest point of the press roll 18, which set the roll gap T, are the maximum pressure points. The electrode roll pressing device 10 is provided with an electric motor (not shown) as a roll driving means for rotating the press rolls 17 and 18 in synchronization with each other. The electric motor rotates the pair of press rolls 17 and 18 at a sufficiently low speed. The direction of the rotation axis of the press rolls 17 and 18 corresponds to the width direction of the press rolls 17 and 18.

  A scraper mechanism 21 is provided near the press roll 17, and a scraper mechanism 22 is provided near the press roll 18. The scraper mechanisms 21 and 22 form a part of the electrode roll press device 10.

  As shown in FIG. 2, the scraper mechanism 21 of the upper press roll 18 includes a scraper 23, a holder member 24, a fixing member 25, an elastic member 26, and an air cylinder 27. The scraper 23 is in the form of a thin plate and is made of a fiber reinforced resin (FRP) containing glass fibers, and is for peeling off foreign matters attached to the roll surface 19. The scraper 23 is fixed and held by the holder member 24 by the fixing member 25. The tip 28 of the scraper 23 is in contact with the roll surface 19, and the opposite end 29 opposite to the tip 28 faces the fixing member 25. When the scraper 23 is held by the holder member 24, the opposite end 29 corresponds to the base end of the scraper 23. The scraper 23 has a scraper width set corresponding to the dimension of the press roll 17 in the width direction and a scraper length A in a direction orthogonal to the width direction of the press roll 17. In this embodiment, the scraper 23 has a plate thickness of 1.5 mm. The contact angle, which is an angle formed by the length direction of the scraper 23 and the tangential direction of the press roll 17, is set to an optimum contact angle according to various conditions such as the rotation speed of the press roll 17 and the condition of foreign matter.

  Next, the holder member 24 will be described. The holder member 24 is for holding the scraper 23, and is made of a metal material (for example, stainless steel). The holder member 24 is a plate-like member, extends toward the roll surface 19, and has a holder width set corresponding to the scraper width. A recess 30 is formed on one surface of the holder member 24 with which the scraper 23 is brought into contact. When the scraper 23 is held by the holder member 24, the elastic member 26 is arranged in the recess 30. The elastic member 26 has a function of applying a biasing force to the scraper 23. As the elastic member 26, an elastic metal spring or rubber is used.

  A portion of the holder member 24 that is closer to the holder tip 31 on the roll surface 19 side than the concave portion 30 is a scraper contact portion 32 that contacts the scraper 23. The scraper contact portion 32 is formed with a flat contact surface 33 that comes into surface contact with the scraper 23. The scraper contact portion 32 has a plate thickness that decreases toward the tip 31 of the holder. A portion of the holder member 24 from the recess 30 to the opposite end 34 of the holder tip 31 is a fixing portion 35 to which the fixing member 25 is fixed. The opposite end 34 corresponds to the base end of the holder member 24. A through hole 36 is formed in the fixing portion 35 so as to penetrate in the plate thickness direction. The rod 37 of the air cylinder 27 is connected to the opposite end 34 of the holder member 24. The air cylinder 27 corresponds to an urging member for advancing the rod 37, urging the scraper mechanism 21 toward the press roll 17, and bringing the scraper 23 into close contact with the roll surface 19. The air cylinder 27 has a function of retracting the rod 37 and separating the scraper 23 from the roll surface 19.

The fixing member 25 fixed to the holder member 24 includes a block portion 38 that comes into contact with the holder member 24, and a pressing portion 39 that is integrally formed with the block portion 38 and that presses the scraper 23 toward the holder member 24. . The block portion 38 and the pressing portion 39 have a width corresponding to the width of the press roll 17. A through hole 40 is formed in the block portion 38. The fixing member 25 is fixed to the holder member 24 by fastening the bolt 41 and the nut 42.
The bolt 41 is inserted into the through holes 36 and 40, and the nut 42 is fastened to the shaft portion of the bolt 41 protruding from the holder member 24. When the fixing member 25 is fixed to the holder member 24, the scraper 23 is located between the pressing portion 39 and the holder member 24, and the elastic member 26 is interposed between the scraper 23 and the holder member 24. . Although not shown, a foreign matter collecting mechanism is provided near the tip of the holder member 24. The foreign matter collecting mechanism collects the foreign matter peeled off by the scraper 23.

By the way, in the present embodiment, the position corresponding to the opposite end 29 of the scraper 23 in the holder member 24 is the reference position P, and the length from the reference position P to the holder tip 31 is the holder member effective length B. The length direction from the reference position P to the holder tip 31 is parallel to the length direction from the opposite end 29 of the scraper 23 to the tip 28. In the present embodiment, the scraper length A and the effective length of the holder member B are
Conditional expression: 0.9 <B / A <1
Meet Incidentally, when B / A = 1, the holder member 24 may interfere with the press roll 17, but by setting B / A <1, the interference of the holder member 24 with the press roll 17 is avoided. . Further, the inventors have found that when B / A ≦ 0.9, there is a high possibility that an unpleasant high-frequency noise is generated due to the harshness caused by the friction between the scraper 23 and the press roll 17. In this embodiment, A = 80 mm, B = 76 mm, and B / A = 0.95. Further, the plate thickness of the holder tip 31 at the scraper contact portion 32 is 1 mm, the plate thickness at the recess 30 side of the scraper contact portion 32 is 2.0 mm, and the average plate thickness of the scraper contact portion 32 is 1 mm. It is set to 0.5 mm.

  As shown in FIG. 3, the scraper mechanism 22 of the lower press roll 18 includes a scraper 43, a holder member 44, a fixing member 45, an elastic member 46, and an air cylinder 47.

  The scraper 43 is the same as the scraper 23, and is for peeling off the foreign matter adhering to the roll surface 20. The scraper 43 is fixed and held by the holder member 44 by the fixing member 45. The tip 48 of the scraper 23 is in contact with the roll surface 20, and the opposite end 49 opposite to the tip 48 faces the fixing member 45. When the scraper 43 is held by the holder member 44, the opposite end 49 corresponds to the base end of the scraper 43. The scraper 43 has a scraper width set corresponding to the size of the press roll 18 in the width direction and a scraper length A in a direction orthogonal to the width direction of the press roll 18. In this embodiment, the scraper 43 has a plate thickness of 1.5 mm. The contact angle, which is the angle formed by the length direction of the scraper 43 and the tangential direction of the press roll 18, is set to an optimum contact angle according to various conditions such as the rotation speed of the press roll 18 and the condition of foreign matter.

  Next, the holder member 44 will be described. The holder member 44 is the same as the holder member 24 and is for holding the scraper 43. The holder member 44 is a plate-like member, extends toward the roll surface 20, and has a holder width set corresponding to the scraper width. A recess 50 is formed on one surface of the holder member 44, which contacts the scraper 43. When the scraper 43 is held by the holder member 44, the elastic member 46 is arranged in the recess 50. The elastic member 46 has a function of applying a biasing force to the scraper 43. As the elastic member 46, a metal spring or rubber having elasticity is used.

  A portion of the holder member 44 that extends from the recess 50 to the holder tip 51 on the roll surface 20 side is a scraper contact portion 52 that contacts the scraper 43. The scraper contact portion 52 is formed with a flat contact surface 53 that comes into surface contact with the scraper 43. The scraper contact portion 52 has a plate thickness that decreases toward the tip 51 of the holder. A portion of the holder member 44 from the recess 50 to the opposite end 54 of the holder tip 51 is a fixing portion 55 to which the fixing member 45 is fixed. The opposite end 54 corresponds to the base end of the holder member 44. The fixing portion 55 is formed with a through hole 56 penetrating in the plate thickness direction. A rod 57 of an air cylinder 47 is connected to the opposite end 54 of the holder member 44. The air cylinder 47 corresponds to an urging member for advancing the rod 57, urging the scraper mechanism 22 toward the press roll 18, and bringing the scraper 43 into close contact with the roll surface 20. The air cylinder 47 has a function of retracting the rod 57 and separating the scraper 43 from the roll surface 20.

The fixing member 45 fixed to the holder member 44 includes a block portion 58 that comes into contact with the holder member 44, and a pressing portion 59 that is integrally formed with the block portion 58 and that presses the scraper 43 toward the holder member 44. . The block portion 58 and the pressing portion 59 have a width corresponding to the width of the press roll 18. A through hole 60 is formed in the block portion 58. The fixing member 45 is fixed to the holder member 44 by fastening the bolt 61 and the nut 62.
The bolt 61 is inserted into the through holes 56 and 60, and the nut 62 is fastened to the shaft portion of the bolt 61 protruding from the holder member 44. When the fixing member 45 is fixed to the holder member 44, the scraper 43 is located between the pressing portion 59 and the holder member 44, and the elastic member 46 is interposed between the scraper 43 and the holder member 44. . Although not shown, a foreign matter collecting mechanism is provided near the tip of the holder member 44. The foreign matter collecting mechanism collects the foreign matter peeled off by the scraper 43.

By the way, in the present embodiment, the position of the holder member 44 corresponding to the opposite end 49 of the scraper 43 is set as the reference position P, and the length from the reference position P to the holder tip 51 is set as the holder member effective length B. The length direction from the reference position P to the holder tip 51 is parallel to the length direction from the opposite end 49 of the scraper 43 to the tip 48. In the present embodiment, the scraper length A and the effective length of the holder member B are
Conditional expression: 0.9 <B / A <1
Meet By the way, when B / A = 1, the holder member 44 may interfere with the press roll 18, but by setting B / A <1, the interference of the holder member 44 with the press roll 18 is avoided. . Further, the inventor has found that when B / A ≦ 0.9, there is a high possibility that an unpleasant high-frequency noise is generated due to the harshness caused by the friction between the scraper 43 and the press roll 18. In this embodiment, A = 80 mm, B = 76 mm, and B / A = 0.95. Further, the plate thickness of the holder tip 51 at the scraper contact portion 52 is 1 mm, the plate thickness at the recess 50 side of the scraper contact portion 52 is 2.0 mm, and the average plate thickness of the scraper contact portion 52 is 1 mm. It is set to 0.5 mm.

  Next, the operation of the electrode roll press device 10 of this embodiment will be described. When the electrode roll press device 10 is operated, in the scraper mechanism 21 (22), the air cylinder 27 (47) is operated so that the scraper 23 (43) is brought into close contact with the roll surface 19 (20). By the operation of the air cylinder 27 (47), the scraper 23 (43) is in a biased state that constantly presses the roll surface 19 (20). When the electrode roll press device 10 is operated, the electrode sheet 11 sent out from the winding roll 15 passes between the pair of press rolls 17 and 18, and is pressed by the pair of press rolls 17 and 18. The electrode sheet 11 that has been pressed and passed between the pair of press rolls 17 and 18 is wound around the winding roll 16.

During the operation of the electrode roll press device 10, foreign matter may exist on the roll surface 19 (20). Specifically, this is a case where the active material layers 13 and 14 of the electrode sheet 11 are partly peeled off and adhered to the roll surface 19 (20) when pressed by the press roll 17 (18). The material of the active material layers 13 and 14 also contains a binder and easily adheres to the roll surface 19 (20). In particular, the active material is not evenly mixed to cause spots, or the binder is If the active material layers 13 and 14 are present in the form of lumps, some of the active material layers 13 and 14 are easily peeled off. The foreign matter present on the roll surface 19 (20) is peeled off by the scraper 23 (43). The removed foreign matter is collected by the foreign matter collection mechanism.

In the present embodiment, the scraper length A and the holder member effective length B are
Conditional expression: 0.9 <B / A <1
Meet The contact surface 33 (53) formed on the scraper contact portion 32 (52) and the scraper 23 (43) are held in surface contact with each other. Therefore, the scraper abutting portion 32 (52) suppresses vibration caused by friction between the holder tip 31 (51) of the scraper 23 (42) and the roll surface 19 (20), and the high frequency is unpleasant due to the harshness of the vibration. To prevent the generation of abnormal noise.

  Since the plate thickness of the scraper abutting portion 32 (52) becomes thinner toward the tip 31 (51) of the holder, the scraper 23 (43) flexes moderately, and due to this moderate flexing, the scraper 23 (43) has a necessary function. Is fulfilled. The elastic member 26 (46) urges the vicinity of the opposite end 29 (49) of the scraper 23 (43) toward the fixing member 25 (45) to hold the scraper 23 (43) against the holder member 24 (44). Is working.

  The scraper 43 (43) is replaced depending on the worn state of the scraper 23 (43). When exchanging the scraper 23 (43), the rotation of the press roll 17 (18) is stopped, and in the scraper mechanism 21 (22), the air cylinder 27 (so as to separate the scraper 23 (43) from the roll surface 19 (20). Activate 47). The scraper 23 (43) is separated from the roll surface 19 (20) by the operation of the air cylinder 27 (47). Next, the fixing member 25 (45) is removed, and the worn scraper 23 (43) is removed from the holder member 24 (44). A new scraper 23 (43) is attached to the holder member 24 (44) by a fixing member 25.

The electrode roll press device 10 of the present embodiment has the following operational effects.
(1) When the scraper length A and the holder member effective length B are satisfied, the conditional expression 0.9 <B / A is satisfied, so that the holder member 24 (44) is the roll surface 19 (20) of the scraper 23 (43). ) Hold the scraper 23 (43) up to near the tip. Since the holder member 24 (44) holds the scraper 23 (43) up to the vicinity of the tip of the scraper 23 (43), vibration due to friction of the scraper 23 (43) with the roll surface 19 (20) is suppressed, and the scraper 23 (43) vibrates. No unpleasant high-frequency noise is generated due to harshness. Even if the scraper length A and the effective length B of the holder member 24 (44) are 0.9 <B / A <1.0, the scraper 23 (43) does not turn up and the scraper 23 (43) is normal. To function.

(2) Since the holder member 24 (44) becomes thinner from the reference position A toward the holder tip 31 (51), the scraper 23 (43) functions as the scraper 23 (43). Therefore, it is possible to moderately bend it. Further, the holder tip 31 (51) of the holder member 24 (44) hardly interferes with the roll surface 19 (20).

(3) The scraper 23 (43) is held by the holder member 24 (44) by surface contact, and the scraper 23 (43) is more stable than the case where the scraper 23 (43) is held by the scraper by line contact. Can be held by the holder member 24 (44).

(Second embodiment)
Next, a roll press device according to the second embodiment will be described. This embodiment is different from the first embodiment in that a part of the structure of the holder member is different. Therefore, the description of the first embodiment is cited for the configuration common to the present embodiment and the first embodiment, and the reference numerals are commonly used. In this embodiment, only the scraper mechanism of the upper roll press will be described, and the description of the scraper mechanism of the lower roll press will be omitted.

  The holder member 72 in the scraper mechanism 71 of the electrode roll press device 70 shown in FIG. 4 is for holding the scraper 23, and is made of a metal material (for example, stainless steel). The holder member 72 is a plate-like member, extends toward the roll surface 19, and has a holder width set corresponding to the scraper width. A recess 73 is formed on one surface of the holder member 72 on which the scraper 23 abuts. When the scraper 23 is held by the holder member 72, the elastic member 26 is arranged in the recess 73. The elastic member 26 has a function of applying a biasing force to the scraper 23. As the elastic member 26, rubber or spring having elasticity is used.

  A portion of the holder member 72 from the recess 73 to the tip 74 of the holder on the roll surface 19 side is a scraper contact portion 75 that contacts the scraper 23. The scraper contact portion 75 has a plate thickness that decreases toward the tip 74 of the holder. A portion of the holder member 72 from the recess 73 to the opposite end 76 of the holder tip 74 is a fixing portion 77 to which the fixing member 45 is fixed. The opposite end 76 corresponds to the base end of the holder member 72. The fixing portion 77 is formed with a through hole 78 penetrating in the plate thickness direction. The rod 37 of the air cylinder 27 is connected to the opposite end 76 of the holder member 72.

  The scraper contact portion 75 of the present embodiment is provided with a protrusion 79 adjacent to the recess 73. The projecting portion 79 projects toward the scraper 23 side and is formed over the width of the roll surface 19. The protrusion 79 and the holder tip 74 are formed by two planes forming an obtuse angle. Therefore, when the scraper 23 is held by the scraper abutting portion 75, the scraper 23 makes a line contact at the holder tip 74 and the protruding portion 79, and a gap 80 is formed between the scraper abutting portion 75 and the holder member 72. To be done.

In the present embodiment, the position corresponding to the opposite end 29 of the scraper 23 in the holder member 72 is the reference position P, and the length from the reference position P to the holder tip 74 is the holder member effective length B. The length direction from the reference position P to the tip 74 of the holder is parallel to the length direction from the opposite end 29 of the scraper 23 to the tip 28. In the present embodiment, the scraper length A and the effective length of the holder member B are
Conditional expression: 0.9 <B / A <1
Meet In this embodiment, A = 80 mm, B = 76 mm, and B / A = 0.95. The plate thickness of the holder tip 31 at the scraper contact portion 75 is 1 mm, and the plate thickness at the recess 73 side of the scraper contact portion 75 is 2.0 mm.

  According to this embodiment, the same operational effects as the operational effects (1) and (2) of the first embodiment are exhibited. Further, even when the scraper 23 is held by a plurality of line contacts with the holder member 72, it is possible to cause the scraper 23 to appropriately bend so as to function as the scraper 23. Further, the scraper contact portion 75 of the holder member 72 is less likely to be restricted by the design due to the formation of the contact surface 33 for surface contact, and the degree of freedom in designing the holder member 72 is improved.

  The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the invention, and for example, the following modifications may be made.

In the above embodiment, the electrode roll pressing device that presses the electrode sheet that is the precursor of the positive electrode is used, but an electrode roll pressing device that presses the electrode sheet that is the precursor of the negative electrode may be used. In the above-mentioned embodiment, the active material layer is the electrode sheet formed at a predetermined interval, but this is not a limitation. It may be an electrode sheet in which an active material layer is continuously formed.
In the above embodiment, the scraper mechanism is provided on each of the upper and lower press rolls, but the invention is not limited to this. For example, one of the upper and lower press rolls may be provided with a scraper mechanism, and the other press roll may be provided with a foreign matter removing mechanism having a configuration different from that of the scraper mechanism. The scraper mechanism of the first embodiment may be provided on one press roll, and the scraper mechanism of the second embodiment may be provided on the other press roll.
In the above embodiment, the fiber reinforced resin (FRP) containing glass fiber was used as the scraper, but the scraper is not limited to this. The scraper may be made of another material as long as it is at least a thin plate and has a function of removing foreign matter. Further, the plate thickness is set to 1.5 mm, but this is merely an example, and the plate thickness may be changed according to conditions.
In the above embodiment, A = 80 mm and B = 76 mm and B / A = 0.95, but the values of A and B are not limited to this. A and B may be values satisfying the conditional expression: 0.9 <B / A <1. As the value of B / A becomes closer to 1, the holder member is more likely to interfere with the press roll, but the effect of suppressing the vibration of the scraper is improved.
In the above-described embodiment, the scraper contact portion of the holder member is set so that the plate thickness becomes thinner toward the tip, but the invention is not limited to this. As long as the roll surface and the holder member do not interfere with each other, the scraper contact portion may have a constant plate thickness, for example.
In the above embodiment, the electrode roll pressing device in the electrode manufacturing device is used, but the roll pressing device is not limited to the electrode roll pressing device for electrode manufacturing. The present invention can be applied even if the object to be pressed by the roll pressing device is other than the electrode.
In the above-described second embodiment, the scraper is held by the holder member in a state where the scraper is in line contact with the holder member at two points, but the present invention is not limited to this. There may be three or more places in line contact, and at least two or more places may be present. For example, the surface of the holder member that comes into contact with the scraper may be a corrugated surface that enables linear contact at a plurality of locations, or the scraper contact portion itself of the holder member may be a corrugated plate.

10, 70, 90 Electrode press roll device 11, 93 Electrode sheet 17, 18, 91, 92 Press roll 19, 20 Roll surface 21, 22, 71 Scraper mechanism 23, 43, 97, 98 Scraper 24, 44, 72 Holder member 25, 45 Fixing member 28, 48 Tip 29, 49 Opposite end 30, 50, 73 Recess 31, 31, 74 Holder tip 32, 52, 75 Scraper abutting portion 33, 53 Abutting surface 34, 54, 76 Opposite end 79 Projection 80 Gap A Scraper length B Holder member effective length G Foreign matter P Reference position T Roll gap

Claims (4)

A pair of press rolls that rotate relative to each other,
A scraper that is brought into close contact with the roll surface of at least one of the pair of press rolls,
A holder member for holding the scraper,
In a roll pressing device comprising: a biasing member that applies a biasing force to bring the scraper into close contact with the roll surface, to the holder member,
A recess is formed on one surface of the holder member with which the scraper is abutted,
An elastic member having a function of applying a biasing force to the scraper is disposed in the recess,
The tip of the scraper is biased toward the holder tip of the holder member by the elastic member,
A surface of the scraper opposite to the surface in contact with the holder member is closely attached to the roll surface,
The scraper length from the base end of the scraper to the tip on the roll surface is A,
The holder member effective length from the reference position corresponding to the base end of the scraper in the holder member to the holder tip of the holder member is B,
And when
Conditional expression: 0.9 <B / A <1
A roll press device characterized by satisfying:   2. The roll pressing apparatus according to claim 1, wherein the holder member has a thickness that decreases from the reference position toward the tip of the holder.   The roll press device according to claim 1 or 2, wherein the holder member and the scraper are in surface contact with each other.   The roll press device according to claim 1, wherein the holder member and the scraper are in line contact with each other at a plurality of points.

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