JP6694191B1 - Winding core, winding unit, and winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a winding core, a winding unit, and a winding device capable of improving the efficiency of manufacturing a winding body without causing distortion in the winding body. SOLUTION: When a first winding member 30 and a second winding member 34 are separated from each other, a first outer peripheral surface 200 (1) which is an outer peripheral surface of the first winding member 30 and a second winding member 34. The second outer peripheral surface 200 (2) which is the outer peripheral surface of the first winding member 30 and the second outer peripheral surface 200 (2) constitute a winding surface around which the separator and the electrode are wound. 200 (1) is composed of two first outer sides 202 (1) and one first protrusion side 204 (1) continuous with the two first outer sides 202 (1), The second outer peripheral surface 200 (2) of the second winding member 30 has two second outer sides 202 (2) and one second protrusion continuous with the two second outer sides 202 (2). And side 204 (2). [Selection diagram] Figure 2

Description

  The present invention relates to a winding core for manufacturing a winding body for forming a battery or a capacitor, a winding unit using the winding core, and a winding device using the winding unit.

  Conventionally, flat batteries or capacitors have been manufactured and used. The flat battery or the like is soaked with the electrolytic solution between the separator and the positive electrode and the negative electrode of the flat wound body 109 (shown in FIG. 16A) manufactured by the winding device 120 shown in FIG. It was manufactured by incorporating it. As shown in FIG. 16B, the wound body 109 was manufactured by winding a strip-shaped material 126 including a strip-shaped positive electrode, a negative electrode, and a separator around a plate-shaped winding core 108.

  However, in the case of the plate-shaped winding core 108, when the winding core 108 is rotated at a constant rotation speed R, the winding speed V1 is when the winding core 108 is parallel to the winding speed V1 direction (Fig. 16 (b) is indicated by a solid line) and becomes substantially 0, and becomes maximum when the winding core 108 is perpendicular to the direction of the winding speed V1 (shown by a broken line in FIG. 16 (b)). For example, when the winding core 108 shifts from the state parallel to the direction of the winding speed V1 to the vertical state, a positive acceleration is generated in the direction of the winding speed V1 and the winding core 108 moves in the direction of the winding speed V1. Negative acceleration occurs when transitioning from a state perpendicular to the parallel state. Therefore, the winding speed V1 becomes non-uniform, and the tension applied to the strip 126 becomes non-uniform. When the winding core 108 shifts from the state perpendicular to the direction of the winding speed V1 to the state parallel to the winding speed V1, the winding strip 126 is loosened, which is unnecessary between the strips 126 of the winding body 109. There is a gap. In addition, since the strip 126 does not have tension, the strip 126 is not wound straight, and distortion (distortion) occurs. Further, when the rotation speed R of the winding core 108 is increased, when the winding speed V1 rapidly increases, excessive tension may be suddenly applied to the strip 126, and the strip 126 may be damaged. For this reason, the rotation speed R cannot be increased, and the manufacturing efficiency of the wound body 109 cannot be improved. The invention of the present invention has been filed by the inventor of the present application (see Patent Documents 1 and 2), but the present invention is not conceived.

Patent No. 6234035 JP, 2014-133652, A

  An object of the present invention is to provide a winding core, a winding unit, and a winding device that can improve the efficiency of manufacturing a wound body without causing distortion in the wound body.

Further, the winding core of the present invention has a rotation center, is attached to a rotating jig of a winding device, is rotated around the rotation center, and a strip-shaped material including a separator and an electrode is wound to form a flat winding. A core that manufactures the body,
Having a winding surface for winding the strip,
The winding surface has two first outer sides, one first protrusion side continuous with the first outer sides, and two second outer sides in a cross section perpendicular to the center of rotation. A side and one second protrusion side continuous with the two second outer sides,
In a cross section perpendicular to the rotation center, the first protrusion side and the second protrusion side are point-symmetric with respect to the rotation center as a center of symmetry, and the apex of the first protrusion side and the second protrusion side. In a direction perpendicular to a line connecting the apex of the first outer side, the first outer side swells more than the first protruding side, and the second outer side swells more than the second protruding side. Characterize.
The winding core of the present invention has a rotation center, is attached to a rotating jig of a winding device, is rotated around the rotation center, and a strip-shaped article including a separator and an electrode is wound to form a flat wound body. It is a core to be manufactured,
A fixing member fixed to the rotating jig,
A first winding member having a first outer peripheral surface, having a front end and a rear end, the rear end being fixed to the fixing member;
A second winding member having a second outer peripheral surface, having a front end and a rear end, and being configured to be separated or approached to the first winding member in a direction perpendicular to the rotation center; ,
Equipped with
When the first winding member and the second winding member are separated, to form a winding surface that winds the separator and the electrode by the first outer peripheral surface and the second outer peripheral surface,
The first outer peripheral surface of the first winding member has two first outer sides and two straight lines intersecting and intersecting with the two first outer sides in a cross section perpendicular to the center of rotation. Consisting of one primary protrusion side,
The second outer peripheral surface of the second winding member has two second outer sides and two straight lines that intersect and intersect the second outer sides in a cross section perpendicular to the center of rotation. Consisting of one secondary protrusion side consisting of
When the first winding member and the second winding member are separated from each other, in a cross section perpendicular to the rotation center, the first protrusion side and the second protrusion side are the centers of symmetry with respect to the rotation center. In the direction perpendicular to the direction in which the first winding member and the second winding member are spaced apart from each other, the first outer side bulges out more than the first protrusion side, and the second outer side is second. It is characterized in that it is configured to bulge out more than the protrusion side.

In the winding core of the present invention, when the first winding member and the second winding member are separated from each other to form the winding surface, the first winding is provided in a cross section perpendicular to the rotation center. The first outer side of the member is a first arc forming a part of a circle having the center of rotation as a center point, and the second outer side of the second winding member has a center point of the center of rotation. Is a second arc forming part of a circle
In a front view, it is line-symmetrical about an extension line extending from the center of rotation in the direction of separation and approach of the first winding member and the second winding member as a symmetrical axis, and is perpendicular to the extension line. It is line-symmetrical with the perpendicular line passing through the center of rotation as the axis of symmetry ,
On the left side of the extending line in the front view and below the perpendicular line, the counterclockwise angle with respect to the perpendicular line at the boundary between the first outer side and the first protrusion side is larger than 45 ° and smaller than 75 °, The angle of the counterclockwise direction with respect to the vertical line at the leftmost of the arc of the first outer side is larger than 10 ° and smaller than 20 ° .

The core of the present invention is characterized in that, in the core, a torque or a moment for rotating the core about the rotation center is constant .

Further, the winding unit of the present invention the winding is provided with the winding core, a rotation drive mechanism for rotating the winding core, by moving the core in the direction of the rotation in the heart, the wound body prepared An extraction mechanism for extracting the core is provided.

  Further, in the winding unit of the present invention, in the winding unit, in the cross section perpendicular to the rotation center, the first protrusion side and the second protrusion side of the winding core have a fixed direction. It is configured such that the rotation of the winding core is stopped in a state of facing to.

Further, the winding device of the present invention is a winding device including a winding unit, wherein the manufactured winding body is separated from the first winding member and the second winding member of the winding core to be close to each other. It is characterized by comprising a flat press which is sandwiched in a direction perpendicular to the direction and is pressed so as to have a flat shape.

  According to the winding core of the present invention, in the direction perpendicular to the direction in which the first winding member and the second winding member are spaced apart from each other, the first outer side bulges out more than the first protrusion side, and the second outer side is the first side. It is configured to bulge out beyond the two protrusion sides, and the difference between the maximum length in the separation approach direction and the maximum length in the direction perpendicular to the separation approach direction is small in the entire core. Therefore, the winding speed V1 does not become non-uniform, and the tension applied to the belt-like material becomes substantially constant. As a result, slack does not occur in the wound strip, and unnecessary gaps and distortion (distortion) do not occur in the wound body. In addition, even if the rotation speed of the winding core is increased, the winding speed of the winding core does not suddenly increase, and the belt-shaped material to be wound is not suddenly applied with excessive tension. It will not be damaged. Therefore, the rotation speed can be increased, and the manufacturing efficiency of the wound body can be improved. Further, since the strip can be wound without changing the rotation speed of the winding core, the rotation of the winding core can be easily controlled.

  Further, according to the winding core of the present invention, since the first protrusion side and the second protrusion side that are point-symmetrical to each other are provided, when the wound body is deformed into a flat shape, the first protrusion side and the In the vicinity of the portion pressed by the second protrusion side, the first winding member and the second winding member are separated from each other in a separating approach direction and in a direction perpendicular to the separating approach direction, and are linearly formed to easily bend. There is. Therefore, by bending along the mountain fold line, it is possible to manufacture a beautiful flat wound body without distortion.

According to the winding core of the present invention, when the first winding member and the second winding member are separated from each other to form a winding surface, the first outer side of the first winding member in a cross section perpendicular to the rotation center. The side is a first arc forming a part of a circle having the center of rotation as a center point, and the second outer side of the second winding member is a first arc forming a part of a circle having the center of rotation as a center point. It has two circular arcs and is substantially circular as a whole. Therefore, the torque and moment for rotating around the rotation center are substantially constant, and the load on the mechanism for rotating can be reduced.

According to the winding core of the present invention, the first protrusion side is tangential to the first outer side, and the second protrusion side is tangential to the second outer side. In particular, the outer peripheral surface and the inner peripheral surface of the portion pressed by the boundary between the first protrusion side and the first outer side are smooth, and unnecessary polygonal lines do not occur. Therefore, the precision and quality of the wound body to be manufactured can be improved.

It is a side view which shows the structure of the winding core which concerns on this invention. It is a figure which shows the structure of the winding core of FIG. 1, the figure (a) is a front view, and the figure (b) is an AA line cut section sectional view. It is a side view which shows the winding unit of this invention which uses the winding core of FIG. FIG. 3 is a side view showing a state in which the first winding member and the second winding member are separated from each other and the first holding member and the second holding member are close to each other in the winding core of FIG. 1. FIG. 2 is a view showing a state where the first winding member and the second winding member are separated from each other and the first holding member and the second holding member are close to each other in the winding core of FIG. 1, and FIG. It is a figure and the figure (b) is a BB line cutting section sectional view. FIG. 3 is a side view showing a state where the winding core is moved in the positive direction of the X axis in the winding unit of the present invention using the winding core of FIG. 1. It is a front view which shows the winding device containing the winding unit of this invention which uses the winding core of FIG. It is a front view which shows the use condition of the winding core of FIG. 1, and the same figure (a) shows the state which the 1st separator and the 2nd separator were inserted in the clearance gap between a 1st clamping member and a 2nd clamping member. FIG. 2B shows a state in which the first holding member and the second holding member hold the first separator and the second separator. It is a front view which shows the use condition of the winding core of FIG. 1, the figure (a) shows the time of the rotation start of a winding core, and the figure (b) shows the state in which the winding body was manufactured. It is a front view which shows the use condition of the winding core of FIG. 1, and the same winding figure (a) shows the state which a 2nd winding member and a 2nd clamping member slide in the direction of D1 (Z-axis reverse direction). (B) of the same figure shows a state in which the gripping tool slightly lifts the winding body. It is a front view which shows the state which decomposed | disassembled the core of FIG. 1, (a) of the same figure shows a 1st winding member and a 1st clamping member, (b) of the same figure shows a 2nd winding member and a 1st winding member. Two clamping members are shown. It is a figure for demonstrating the shape of the winding core of FIG. 1, the figure (a) is a front view, and the figure (b) is a graph which shows the change of the distance from a centerline to the winding surface angle. .. It is a perspective view which shows the state which deform | transformed the winding body manufactured using the winding core of FIG. 1 into a flat shape. It is a front view which shows other embodiment of the core of this invention. It is a front view which shows the conventional winding device. 15A is a front view showing a wound body manufactured by the winding device of FIG. 15, and FIG. 15B is a front view showing a conventional winding core.

  An embodiment of a winding core and a winding device according to the present invention will be described with reference to the drawings. 1 to 10, reference numeral 10 is a winding core according to the present invention, and reference numeral 12 is a winding unit according to the present invention.

(Constitution)
As shown in FIGS. 1 and 7, the winding core 10 according to the present invention has a rotation center C, and is attached to the rotating jig 14 of the winding unit 12 in FIG. 3 to rotate around the rotation center C. Thus, the winding core 24 is manufactured by winding the strip-shaped positive electrode 16, the strip-shaped first separator 18, the strip-shaped negative electrode 20, and the strip-shaped second separator 22. 1, FIG. 2, FIG. 4, and FIG. 5 show the structure, the description of the raw material such as the first separator 18 or the wound body 24 is omitted.

  As shown in FIGS. 1 and 2, the winding core 10 extends in parallel with the fixing member 26 fixed to the rotating jig 14 of FIG. 3 and the center of rotation C, and has a front end 30 (a) and a rear end 30 (b). ), A rear end 30 (b) of which is fixed to the fixing member 26 and has a first groove 28 which is parallel to the center of rotation C, and a first winding member 30 which extends parallel to the center of rotation C and has a tip 34. A second winding member 34 having (a) and a rear end 34 (b) and having a second groove 32 which is parallel to the rotation center C and faces the first groove 28; and a second winding member 34 which is parallel to the rotation center C. It extends, has a front end 36 (a) and a rear end 36 (b), faces the first groove 28, is inserted into the second groove 32, and the rear end 36 (b) is fixed to the fixing member 26. The first holding member 36 extends in parallel with the center of rotation C, has a front end 38 (a) and a rear end 38 (b), faces the second groove 32, and is inserted into the first groove 28. It includes a second clamping member 38, a rear end 34 (b) and the connecting sliding member 40 for connecting the rear end 38 (b) of the second clamping member 38 of the second spirally wound member 34.

  As shown in FIG. 11A, the fixing member 26, the first winding member 30, and the first holding member 36 are fixed to each other. Further, as shown in FIG. 11B, the second winding member 34, the second holding member 38, and the connecting sliding member 40 are fixed to each other and are integrated with the fixing member 26 and the like in the Z-axis direction. Slide on.

  As shown in FIGS. 1 and 2, the fixing member 26 has a hollow portion 27, and in the hollow portion 27, the Z-axis direction (first winding member 30 and second winding member 30) perpendicular to the rotation center C is provided. 34), the connecting sliding member 40 has an engaging hole 44 into which the sliding pin 42 is inserted, and the connecting sliding member 40 is connected to the fixing member 26. It can slide in the Z-axis direction with respect to the sliding pin 42. The connecting sliding member 40 is provided with a biasing force that slides in the direction D1 (one direction, negative Z-axis direction) by the compression spring 46.

  As shown in FIGS. 1 and 2, the first winding member 30 has a connecting portion 48 continuous to the rear end 30 (b), and the connecting portion 48 is fixed to the hollow portion 27 of the fixing member 26. .. Further, as shown in FIG. 2, the first winding member 30 has a first groove 28 near the center of the upper surface, and the second holding member 38 is inserted in the first groove 28.

  As shown in FIGS. 1 and 2, the second winding member 34 has a connecting portion 50 continuous to the rear end 34 (b), and the connecting portion 50 is fixed to the connecting sliding member 40. As shown in FIG. 2, the second winding member 34 has a second groove 32 near the center of the lower surface, and the first holding member 36 is inserted in the second groove 32. The tip end 30 (a) of the first winding member 30 and the tip end 34 (a) of the second winding member 34 are provided with a convex portion 54 supported by the rotation support tool 52 shown in FIG. The rotation support tool 52 is fixed to the front panel 13 via a frame (not shown), and rotatably supports the winding core 10.

  As shown in FIGS. 1 and 2, the first holding member 36 has a connecting portion 56 continuous to the rear end 36 (b), and the connecting portion 56 is fixed to the hollow portion 27 of the fixing member 26. A groove 58 extending in the X-axis direction is provided at the Z-axis negative facing end of the first holding member 36, and a Z-axis positive facing end of the second holding member 38 is provided extending in the X-axis direction. With the pressing rod 60, the vicinity of the tips of the first separator 18 and the second separator 22 can be firmly clamped and fixed. The vicinity of the tip 36 (a) of the first holding member 36 has a slope 37 so that the winding core 10 can be moved in the X-axis direction and the first separator 18 and the second separator 22 can be inserted easily. The material of the pressing rod 60 is preferably a cemented carbide having high strength.

  As shown in FIGS. 1 and 2, the second holding member 38 has a connecting portion 62 continuous to the rear end 38 (a), and the connecting portion 62 is fixed to the connecting sliding member 40. That is, the second winding member 34 and the second sandwiching member 38 are connected via the connecting slide member 40, and the connecting slide member 40 is moved relative to the sliding pin 42 in the Z-axis direction (rotation center C The second winding member 34 and the second holding member 38 move in the Z-axis direction by sliding in the vertical one vertical axis direction). As a result, by sliding the connecting sliding member 40 in the direction D1 (one direction, negative Z-axis direction) with respect to the sliding pin 42, the first winding member 30 and the second winding member 34. And the first holding member 36 and the second holding member 38 are separated from each other, and the connecting sliding member 40 is moved in the direction D2 opposite to the direction D1 with respect to the sliding pin 42 (the direction opposite to the one direction). The first winding member 30 and the second winding member 34 are separated from each other and the first holding member 36 and the second holding member 38 are close to each other by sliding the first winding member 30 and the second winding member 34 toward each other.

  1 and 2, the first sliding member 30 and the second winding member 30 are rotated by sliding the connecting sliding member 40 in the direction D1 with respect to the fixed member 26 by the urging force of the compression spring 46. The member 34 approaches, and the first holding member 36 and the second holding member 38 are separated from each other. The material of the compression spring 46 is preferably a quenched metal or a high-strength cemented carbide.

  As shown in FIG. 1, the coupling slide member 40 moves the engagement pin 64 extending in the direction of the rotation center C in the X-axis direction (direction of the rotation center C) to engage the engagement pin 64. It has an engaging portion 61. The engaged portion 61 has a tapered portion 65, the winding core 10 engages the sharpened portion 67 of the engaging pin 64 with the tapered portion 65, and the engaging pin 64 moves the engaged portion 61 into the Z-axis positive direction. 4 and 5, the connecting sliding member 40 slides in the Z-axis positive direction with respect to the fixed member 26 by moving the first winding member 30 and the second winding member. The member 34 is separated, and the first holding member 36 and the second holding member 38 are configured to approach each other.

  When the first winding member 30 and the second winding member 34 are separated from each other as shown in FIG. 5, the winding core 10 has a first outer peripheral surface 200 (1) which is an outer peripheral surface of the first winding member 30. The second outer peripheral surface 200 (2) which is the outer peripheral surface of the second winding member 34 constitutes a winding surface around which the separator and the electrode are wound. The first outer peripheral surface 200 (1) of the first winding member 30 has two first outer sides 202 (1) and two first outer sides 202 (1) in a cross section perpendicular to the rotation center C. And one continuous first protrusion side 204 (1). The second outer peripheral surface 200 (2) of the second winding member 34 has two second outer sides 202 (2) and two second outer sides 202 (2) in a cross section perpendicular to the center of rotation C. And one second protrusion side 204 (2) that is continuous with. The first protrusion side 204 (1) and the second protrusion side 204 (2) are formed in a V shape or an L shape. In the winding core 10, when the first winding member 30 and the second winding member 34 are separated from each other, in a cross section perpendicular to the rotation center C, the first protrusion side 204 (1) and the second protrusion side 204 (2). Are configured so as to be point-symmetrical with the center of rotation C as the center of symmetry. In addition, the winding core 10 extends from the center of rotation C in the direction in which the first winding member 30 and the second winding member 34 are separated from each other (connects the apex of the first protrusion side and the apex of the second protrusion side). Line L1 is line-symmetrical about the axis of symmetry. Further, the winding core 10 is line-symmetrical with respect to a perpendicular line L2 which is perpendicular to the extending line L1 and which passes through the rotation center C, as a symmetrical axis.

  As shown in FIG. 5, the two first outer sides 202 (1) of the first winding member 30 are a part of a circle having the center of rotation C as a center point in a cross section perpendicular to the center of rotation C. It is the first arc. The first protrusion side 204 (1) is a straight line and is composed of two tangent lines 206 (1) that are tangential to the arc of the first outer side 202 (1). The tangent line 206 (1) may be an arc that is opposite to the arc of the first outer side 202 (1). The two second outer sides 202 (2) of the second winding member 34 are second arcs that are part of a circle having the rotation center C as a center point in a cross section perpendicular to the rotation center C. The second protrusion side 204 (2) is a straight line and is composed of two tangent lines 206 (2) that are tangential to the arc of the second outer side 202 (2). The tangent line 206 (2) may be a reverse arc (substantially straight line) whose radius is large and is close to a straight line with respect to the arc of the second outer side 202 (2). The first vertex TP (1) of the first protrusion side 204 (1) and the second vertex TP (2) of the second protrusion side 204 (2) are above the extending line L1 in a cross section perpendicular to the rotation center C. Located in. The vicinity of the first apex TP (1) and the vicinity of the second apex TP (2) are fillet processed (chamfered in an arc) with a minute radius (for example, 0.2 mm).

  An example of details of the shape of the winding core 10 will be described below with reference to FIG. FIG. 12A shows a state in which the first winding member 30 and the second winding member 34 are separated from each other to form a winding surface. The details of the shape of the winding core 10 will be described below with reference to the lower left portion of the winding core 10 in FIG. 12A. The winding core 10 is line-symmetrical with the extended line L1 as the axis of symmetry, and the perpendicular line L2 is Since the axis of symmetry is line symmetry, the same can be said for the details of the shape at the upper left, lower right, and upper right. A distance R1 from the rotation center C to the first outer side 202 (1) and a distance R2 from the rotation center C to the first protrusion side 204 (1) are shown in FIG. The angle counterclockwise with respect to the vertical line L2 is θ1. The counterclockwise angle with respect to the perpendicular L2 at the boundary between the first outer side 202 (1) and the tangent line 206 (1) is θ2. For example, θ2 is 58 °. Note that the counterclockwise angle with respect to the perpendicular L2 at the leftmost side of the arc of the first outer side 202 (1) is θ3. θ3 is, for example, 14 °. There is a relationship of R2 = R1 / cos (θ1-θ2) (since the tangent line 206 (1) of the first protrusion side 204 (1) is the tangent line to the first outer side 202 (1), geometrically R1 = R2 * cos (θ1−θ2) is satisfied), as shown in FIG. 12 (b), R2 becomes maximum in the vicinity of θ1 of 90 °. For example, when θ2 is 58 °, R1 Is about 1.18 times, and the difference between R1 and R2 is small.

  Regarding the width of the winding core 10 in the direction of the perpendicular line L2 (the direction perpendicular to the direction in which the first winding member 30 and the second winding member 34 approach and separate from each other), the maximum width W1 of the entire winding core 10 is It is configured to be larger than the maximum width W2 of the protrusion side 204 (1) and the second protrusion side 204 (2). That is, in the direction of the perpendicular L2, the first outer side 202 (1) bulges out more than the first protrusion side 204 (1), and the second outer side 202 (2) bulges out more than the second protrusion side 204 (2). Is configured to go out. Therefore, in the entire core 10, the difference between the maximum length LG1 in the extending line L1 direction and the maximum length LG2 (= W1) in the perpendicular line L2 direction is small. For example, when θ2 is 58 ° and θ3 is 14 °, LG1 / LG2 is about 1.18. As a result, the winding core 10 as a whole has a substantially circular shape in a cross section perpendicular to the rotation center C. If R2 / R1 is larger than 1.0 and smaller than 1.4, it can be considered that the difference between the maximum length LG1 and the maximum length LG2 is small. If θ2 is larger than 45 ° and smaller than 75 °, it can be considered that the difference between the maximum length LG1 and the maximum length LG2 is small. If θ3 is larger than 10 ° and smaller than 20 °, it can be considered that the difference between the maximum length LG1 and the maximum length LG2 is small.

  When assembling the winding core 10, first, the sliding pin 42 is removed from the fixing member 26 shown in FIG. 11 (a), and the connecting sliding member 40 to the second winding member 34 shown in FIG. 11 (b). Also, the second holding member 38 is removed. Next, the connecting sliding member 40 is arranged in the hollow portion 27, the sliding pin 42 is inserted into the fixing member 26, the compression spring 46 and the connecting sliding pin 42 in the Z-axis direction, and the sliding pin 42 is fixed. Fixed to 26. Next, the first holding member 36 is inserted into the second groove 32 of the second winding member 34, the second winding member 34 is fixed to the connecting sliding member 40, and the second holding member 38 is set to the first position. The second holding member 38 is inserted into the first groove 28 of the winding member 30 and is fixed to the connecting sliding member 40. In this way, the winding core 10 shown in FIGS. 1 and 2 is assembled.

  Further, the winding unit 12 according to the present invention includes, as shown in FIG. 3, a winding core 10, a front panel 13, an engagement pin 64 (shown in FIG. 1), and a rotation drive mechanism for rotating the winding core 10. 66, the engagement pin moving mechanism 68 that moves the engagement pin 64 in the direction of the rotation center C, and the winding core 10 is moved in the direction of the rotation center C to move the winding core 10 from the manufactured winding body 24. It is provided with a withdrawal mechanism 70 for withdrawing. The winding unit 12 is used by being incorporated in a winding device 71 shown in FIG. 7 having the same configuration as the winding device 120 shown in FIG. 15 except for the winding unit 12.

  The rotary drive mechanism 66 is composed of, for example, a servo motor or a stepping motor. The rotation drive mechanism 66 is configured to stop the rotation of the winding core 10 in a state where the first protrusion side 204 (1) and the second protrusion side 204 (2) of the winding core 10 face in a certain direction. .. For example, the rotation drive mechanism 66 is configured to stop the rotation of the winding core 10 in a state where the wire L1 of the winding core 10 is oriented in the up-down direction (Z-axis direction) as shown in FIG. 10B. Has been done. The winding device 71 includes a flat press 210 that sandwiches the manufactured wound body 24 in the direction of the vertical line L2 and presses the wound body 24 into a flat shape in a state where the winding core 10 is stopped. The flat press 210 is composed of two pressing dies 212 that approach each other in the direction of the perpendicular L2. The mechanism for bringing the two pressing dies 212 closer to each other is not particularly limited, and may be a hydraulic cylinder, a pneumatic cylinder, a servo motor, a stepping motor, or the like.

  As shown in FIG. 3, the rotary drive mechanism 66 includes a rotary jig 14 that fixes the core 10 and rotates together with the core 10, and a motor 72 that rotationally drives the rotary jig 14. The rotating jig 14 includes a fixed portion 74 that fixes the joint 63 of the winding core 10 and a first rod 76 that is continuous with the fixed portion 74 and that has a hollow portion. The joint 63 is configured integrally with the fixing member 26. The fixing portion 74 is inserted with the joint 63 and fixed by a fastener such as a screw. The second rod 78 is inserted into the hollow portion of the first rod 76 so that the second rod 78 can slide relative to the first rod 76 in the X-axis direction.

  The engagement pin moving mechanism 68 has a front end and a rear end, the fixing portion 69 of the engagement pin 64 is fixed to the front end, and the second rod 78 inserted into the hollow portion of the first rod 76 and the second rod. The cam follower 80 supports a rear end of the cam 78 and a cylinder 82 that moves the cam follower 80 in the X-axis direction. When the cylinder 82 operates, the engagement pin 64 moves in the X axis direction with respect to the first rod 76 together with the second rod 78.

  The extraction mechanism 70 supports the first rod 76, a bearing 84 fixed to the cylinder 82, a moving member 86 fixed to the cylinder 82 and moving in the X-axis direction, and the moving member 86 is moved in the X-axis direction. And a ball screw 88. The rotation of the ball screw 88 causes the moving member 86 to move in the X-axis direction together with the first rod 76 and the winding core 10.

(Action and effect)
By incorporating the winding core 10 and the winding unit 12 into the winding device 71 shown in FIG. 7, the positive electrode 16, the first separator 18, the negative electrode 20, and the second separator 22 are wound to wind the wound body 24. The operation and effect of manufacturing the will be described below.

  As shown in FIG. 7, three winding units 12 to which the winding core 10 is attached are incorporated in the turret 73 of the winding device 71. In FIG. 7, the positive electrode 16, the first separator 18, the negative electrode 20, and the second separator 22 are wound at the position S1, and the positive electrode 16 and the negative electrode 20 are cut by the cutters 75 and 77 to be formed. The wound body 24 is in a state immediately after being sent to the position S2 by the rotation of the turret 73. In the state of FIG. 7, as shown in FIG. 3, the first separator 18 and the second separator 22 have the X axis of the gap 90 between the first holding member 36 and the second holding member 38 of the winding core 10 at the position S1. It is located in the forward extension.

  Next, the ball screw 88 of the extracting mechanism 70 of the winding unit 12 at the position S1 is actuated, and the moving member 86, the rotating jig 14 and the winding core 10 move in the X-axis positive direction as shown in FIG. To do. As the winding core 10 moves in the positive direction of the X-axis, the first separator 18 and the second separator 22 come into contact with the gradient 37 of the winding core 10 and then enter the gap 90, as shown in FIG. Then, the first separator 18 and the second separator 22 are in a state of being inserted into the gap 90 between the first holding member 36 and the second holding member 38. At this time, the projections 54 of the tip 30 (a) of the first winding member 30 and the tip 34 (a) of the second winding member 34 of the winding core 10 are inserted into the rotation support tool 52 and rotatably supported. To be done.

  Next, in the winding unit 12 at the position S1, the cylinder 82 is operated to move the engagement pin 64 in the X-axis positive direction as shown in FIG. The second winding member 34 and the second holding member 38 slide in the direction D2 against the biasing force of the compression spring 46, as shown in FIG. The second winding member 34 and the second holding member 38 slide in the direction D2 against the urging force of the compression spring 46, so that the first holding member 36 and the second holding member 38 come close to each other. As shown in FIG. 8B, the first sandwiching member 36 and the second sandwiching member 38 sandwich the first separator 18 and the second separator 22. Since the first pinching member 36 and the second pinching member 38 are brought close to each other by engaging the engaging pin 64 with the engaged part 61 to sandwich the first separator 18 and the second separator 22, the first separator 18 and The positioning of the second separator 22 is stable. After the first holding member 36 and the second holding member 38 hold the first separator 18 and the second separator 22, the cutter 92 cuts the first separator 18 and the second separator 22.

  Next, in the winding unit 12 at the position S1, the motor 72 of the rotary drive mechanism 66 is operated to rotate the winding core 10 as shown in FIG. 16 is laminated on the first separator 18, the negative electrode 20 is laminated between the first separator 18 and the second separator 22, and the winding core 10 is further rotated, whereby the positive electrode 16, the first separator 18, the negative electrode 20 and the second separator 22 are wound around the winding core. In addition, after stacking the negative electrode 20 on the first separator 18, the positive electrode 16 may be stacked between the first separator 18 and the second separator 22. At this time, the first protrusion side 204 (1) and the second protrusion side 204 (2) press the first separator 18 and the like in the direction outward from the rotation center C. When the winding core 10 is rotated a predetermined number of times, the cutters 75 and 77 cut the positive electrode 16 and the negative electrode 20, and further, the winding core 10 is rotated about a plurality of times to wind the winding core 10 as shown in FIG. 9B. The body 24 is manufactured.

  At this time, the winding core 10 is stopped with the wire L1 oriented in the vertical direction (Z-axis direction). As shown in FIG. 9 (b), the manufactured wound body 24 has a crease at a portion pressed by the first protrusion side 204 (1) and a portion pressed by the second protrusion side 204 (2). Occurs. A fold line LF (is a line connecting the apex TF (1) of the fold of the portion pressed by the first protrusion side 204 (1) and the first apex TP (1) of the first protrusion side 204 (1). 1) and connects the vertex TF (2) of the fold of the portion pressed by the second protrusion side 204 (2) and the second vertex TP (2) of the second protrusion side 204 (2). The line is defined as a fold line LF (2). The fold lines LF (1) and LF (2) are located on the extended line L1.

  When the winding body 24 is manufactured in the winding unit 12 at the position S1, the turret 73 shown in FIG. 7 is rotated clockwise by 120 °, and the winding unit 12 at the position S1 is sent to the position S2 to be manufactured. The wound body 24 is sent to the position S2 while being wound around the winding core 10, and is brought into the state shown in FIG. 7 again. Next, the first holding member 36 and the second holding member 38 of the winding core 10 of S1 different from the winding core 10 of the position S2 hold the first separator 18 and the second separator 22, and the cutter 92 moves to the first position. The one separator 18 and the second separator 22 are cut. At the position S2 for supporting the wound body 24 in which the first separator 18 and the second separator 22 are cut, the winding core 10 is further rotated about a plurality of times to completely wind the first separator 18 and the second separator 22, After the tape 94 is attached to the surface of the winding body 24, the turret 73 is further rotated clockwise by 120 °, and the winding body 24 is sent to the position S3. When the winding core 10 holding the winding body 24 is fed from the positions S1 to S3, the direction of the extended wire L1 of the winding core 10 is maintained in the vertical direction.

  Next, at the position S3, the cylinder 82 of the engagement pin moving mechanism 68 is actuated, the engagement pin 64 is moved in the negative direction of the X axis, and the engagement pin 64 is separated from the engaged portion 61, as shown in FIG. As shown in (a), the second winding member 34 and the second holding member 38 slide in the direction D1 by the urging force of the compression spring 46. When the second winding member 34 and the second holding member 38 slide in the direction D1 with respect to the sliding pin 42, the first winding member 30 and the second winding member 34 approach each other, and A gap 96 is formed between the first winding member 30 and the second winding member 34 and the inner peripheral surface 95 of the winding body 24. Further, the second winding member 34 and the second holding member 38 slide in the direction D1 with respect to the sliding pin 42, so that the first holding member 36 and the second holding member 38 are separated from each other. A gap 90 is formed between the one holding member 36 and the second holding member 38.

  Next, at the position S3, as shown in FIG. 10B, the gripping instrument 98 grips the winding body 24 and slightly lifts the winding body 24. When the gripping device 98 slightly lifts the winding body 24, a gap 96 is formed over the entire inner peripheral surface 95 of the winding body 24. With the gap 96 formed over the entire inner peripheral surface 95 of the winding body 24, the ball screw 88 of the extraction mechanism 70 of the winding unit 12 at the position S1 is actuated, and the winding core 10 moves along the X axis in FIG. By moving in the axial negative direction, the winding core 10 is extracted from the winding body 24. Since the gap 96 is formed over the entire inner peripheral surface 95 of the winding body 24, the winding core 10 does not contact the inner peripheral surface 95 of the winding body 24, and the first winding member 30 and the second winding member are wound. Due to the frictional force between the outer peripheral surface of the member 34 and the inner peripheral surface 95, the winding core 10 does not pull out the center side of the winding body 24 in a bamboo shoot shape and deform it. Therefore, the work for correcting the shape of the wound body 24 is not necessary. Since the gap 96 is formed over the entire inner peripheral surface 95 of the winding body 24, the winding core 10 is placed on the inner peripheral surface 95 of the winding body 24 depending on the position of the winding body 24 lifted by the gripping instrument 98. There is no contact. Further, since the gap 90 is formed between the first sandwiching member 36 and the second sandwiching member 38, the first separator 18 and the second separator 22 are separated from between the first sandwiching member 36 and the second sandwiching member 38. It is extracted smoothly.

  Next, at position S3, the manufactured winding body 24 is moved by the flat press 210 (shown in FIG. 10B) in the direction of the perpendicular line L2 perpendicular to the fold lines LF (1) and LF (2). It is sandwiched and pressed into a flat shape. The wound body 24 in a deformed state is shown in FIG. Since the fold lines LF (1) and LF (2) are generated in advance, the winding body 24 has the apex TF (1) which is one end of the fold line LF (1) and one end of the fold line LF (2). The vertices TF (2) are the vertices of the mountain folds and are deformed into a flat shape. The winding body 24 is not loaded with a bending moment near the fold lines LF (1) and LF (2), and is loaded with a bending moment other than near the fold lines LF (1) and LF (2). Further, the winding body 24 is composed of the apex TF (1) which is one end of the fold line LF (1), and the mountain fold line ML1 (shown in FIG. 13) perpendicular to the extending line L1 and the perpendicular line L2, and the fold line. It is composed of the apex TF (2) which is one end of the line LF (2), and is easily bent along a mountain fold line ML2 (shown in FIG. 13) perpendicular to the extending line L1 and the perpendicular line L2. Therefore, the mountain crease line ML, which is the apex of the mountain crease of the wound body 24, becomes a straight line and is not distorted. That is, the wound body 24 can be deformed into a flat shape without distortion.

  The flat wound body 24 is conveyed to the next step, the electrolytic solution is immersed in the flat wound body 24, and the flat wound body 24 is placed in a metal case or a laminate pack to manufacture a flat battery.

  According to the core 10 of the present invention, as described above, the flat wound body 24 without distortion can be manufactured. Further, in the direction of the perpendicular L2, the first outer side 202 (1) bulges out more than the first protruding side 204 (1), and the second outer side 202 (2) bulges out more than the second protruding side 204 (2). The winding core 10 as a whole is configured so that the difference between the maximum length LG1 in the extending line L1 direction and the maximum length LG2 in the perpendicular line L2 direction is reduced in the entire winding core 10. For this reason, when the winding core 10 is rotated to wind the strip-shaped material such as the positive electrode 16, unlike the conventional winding core 108 shown in FIG. 16B, the winding speed of the strip-shaped material does not become uneven. , The tension applied to the strip becomes almost constant. As a result, there is no slack in the wound strip, and no unnecessary gaps or distortions (distortion) occur in the wound body 24. Further, even if the rotation speed of the winding core 10 is increased, the winding speed of the winding core 10 does not suddenly increase, and the belt-like material 24 to be wound is not suddenly applied with excessive tension. , The band will not be damaged. Therefore, the rotation speed of the winding core 10 can be increased, and the manufacturing efficiency of the wound body 24 can be improved. Further, since the band-shaped material 24 can be wound without changing the rotation speed of the winding core 10, the rotation driving mechanism 66 can easily control the rotation of the winding core 10.

  Further, according to the winding core 10 of the present invention, since it has a substantially circular shape as a whole, the torque and the moment for rotating it around the rotation center C are substantially constant, and the load of the rotation drive mechanism 66 for rotating the core. Can be reduced. Further, the two straight lines forming the first protruding side 204 (1) are in a tangential relationship with the arc of the first outer side 202 (1), and form the second protruding side 204 (2). Since the straight line is tangential to the arc of the second outer side 202 (2), the first protrusion side 204 (1) and the first outer side 202 (1) in the wound body 24. The outer peripheral surface and the inner peripheral surface of the portion pressed by the boundary between and are smooth, and unnecessary polygonal lines do not occur. Therefore, the precision and quality of the wound body 24 to be manufactured can be improved.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above. For example, the shape of the winding core of the present invention is not limited to the above. For example, the winding core 10 shown in FIGS. 14A to 14C may be used.

  The winding core 10 shown in FIG. 14 (a) has two first outer sides 202 (1) and two first outer sides 202 (1) forming a winding surface around which the separator and the electrode are wound in a cross section perpendicular to the rotation center C. The two outer sides 202 (2) are formed of a part of an ellipse, and are substantially elliptical as a whole including the first protrusion side 204 (1) and the second protrusion side 204 (2). In the winding core 10 shown in FIG. 14B, two first outer sides 202 (1) and two second outer sides 202 (2) intersect each other in a cross section perpendicular to the center of rotation C2. It is composed of a straight line and is a dodecagon as a whole including the first protrusion side 204 (1) and the second protrusion side 204 (2). In the core 10 shown in FIG. 14C, in the cross section perpendicular to the rotation center C, the two first outer sides 202 (1) and the two second outer sides 202 (2) serve as the rotation center C. It is composed of a part of a circle serving as a center point, and has a substantially circular shape as a whole including the first protrusion side 204 (1) and the second protrusion side 204 (2). The first protrusion side 204 (1) and the second protrusion side 204 (2) of the winding core 10 shown in FIG. 14 (c) are the first outer side 202 (1) or the two second outer sides 202 (2). It may be separately attached or integrated.

  In any of the winding cores 10 of FIGS. 14A to 14C, since the first protrusion side 204 (1) and the second protrusion side 204 (2) that are point-symmetrical to each other are provided, a flat winding without distortion is formed. The revolving body 24 can be manufactured. Further, in the entire core 10, the difference between the maximum length in the extending line L1 direction and the maximum length in the perpendicular line L2 direction is small. Therefore, the tension applied to the wound strip does not become non-uniform, so that the rotation speed of the winding core 10 can be increased. Further, since the strip can be wound without changing the rotation speed of the winding core 10, the rotation of the winding core 10 can be easily controlled.

  Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the illustrated ones. For example, the winding core of the present invention may have a polygon other than a dodecagon in a cross section perpendicular to the rotation center C as long as it has the first protrusion side and the second protrusion side. Further, the invention of the present application is characterized by the shape of the winding surface, and may not be configured by the first winding member and the second winding member. Further, the fixing member, the first winding member, and the first sandwiching member may be integrally formed, and the connecting slide member, the second winding member, and the second sandwiching member may be integrally formed. Further, by engaging the engaging pin with the engaged portion, the connecting sliding member slides in one direction with respect to the fixed member, and the first winding member and the second winding member come close to each other. The first holding member and the second holding member may be separated from each other. In this case, the urging force of the spring causes the connecting slide member to slide relative to the fixed member in the direction opposite to the one direction.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above, and can be implemented with appropriate modifications within a range in which the same action and effect are produced.

10: winding core 12: winding unit 14: rotating jig 16: positive electrode 18: first separator 20: negative electrode 22: second separator 24: winding body 26: fixing member 28: first groove 30: first One winding member 32: Second groove 34: Second winding member 36: First sandwiching member 38: Second sandwiching member 40: Connecting sliding member 52: Rotating support 64: Engaging pin 66: Rotational drive mechanism 68: Engagement pin moving mechanism 70: Extraction mechanism 71: Winding device 76: First rod 78: Second rod 92: Cutter 94: Tape 96: Gap 98: Grasping device 200 (1): First outer peripheral surface 200 (2): Second outer peripheral surface 202 (1): First outer side 202 (2): Second outer side 204 (1): First protrusion side 204 (2): Second protrusion side 206 (1), 206 (2): tangent line 210: flat press 212: pressing die L1: extended line L2: perpendicular line LF Fold lines ML: mountain fold lines R1, R2: distance TP: First vertex TP: Second vertex W1: maximum width W2: maximum width C: center of rotation

Claims (5)

A core having a center of rotation, attached to a rotating jig of a winding device, rotated around the center of rotation, and winding a belt-shaped material including a separator and an electrode to produce a flat wound body.
A fixing member fixed to the rotating jig,
A first winding member having a first outer peripheral surface, having a front end and a rear end, the rear end being fixed to the fixing member;
A second winding member having a second outer peripheral surface, having a front end and a rear end, and being configured to be separated or approached to the first winding member in a direction perpendicular to the rotation center; ,
Equipped with
When the first winding member and the second winding member are separated from each other, forming a winding surface for winding the strip-shaped object by the first outer peripheral surface and the second outer peripheral surface,
The first outer peripheral surface of the first winding member has two first outer sides and two straight lines intersecting and intersecting with the two first outer sides in a cross section perpendicular to the center of rotation. Consisting of one primary protrusion side,
The second outer peripheral surface of the second winding member has two second outer sides and two straight lines that intersect and intersect the second outer sides in a cross section perpendicular to the center of rotation. Consisting of one secondary protrusion side consisting of
When the first winding member and the second winding member are separated from each other, in a cross section perpendicular to the rotation center, the first protrusion side and the second protrusion side are the centers of symmetry with respect to the rotation center. In the direction perpendicular to the separation approaching direction of the first winding member and the second winding member, the first outer side bulges out of the first protrusion side, and the second outer side Is configured to bulge out from the second protrusion side ,
Wherein the first protrusion edge is in a tangential relationship to the first outer edge, the second protrusion edges Ri near relationship tangent to the second outer side,
When the first winding member and the second winding member are separated to form the winding surface, in a cross section perpendicular to the rotation center, the first outer side of the first winding member, It is a first arc forming a part of a circle having the rotation center as a center point, and the second outer side of the second winding member forms a part of a circle having the rotation center as a center point. Is the second arc,
In a front view, it is line-symmetrical about an extension line extending from the center of rotation in the direction of separation and approach of the first winding member and the second winding member as a symmetrical axis, and is perpendicular to the extension line. It is line-symmetrical with the perpendicular line passing through the center of rotation as the axis of symmetry ,
On the left side of the extending line in the front view and below the perpendicular line, the counterclockwise angle with respect to the perpendicular line at the boundary between the first outer side and the first protrusion side is larger than 45 ° and smaller than 75 °, The counterclockwise angle with respect to the perpendicular at the leftmost of the arc of the first outer side is larger than 10 ° and smaller than 20 °.
A winding core characterized by that .   The core according to claim 1, wherein a torque or a moment for rotating around the rotation center is constant. A winding core according to claim 1 or 2 ,
A rotation drive mechanism for rotating the winding core;
By moving the core in the direction of the rotation in the heart, and extraction mechanism for extracting the take-core from the winding body manufactured,
A winding unit equipped with. The rotation drive mechanism is configured to stop the rotation of the winding core in a state where the first protrusion side and the second protrusion side of the winding core are oriented in a constant direction in a cross section perpendicular to the rotation center. The winding unit according to claim 3, which is applied. A winding device including the winding unit according to claim 3 or 4 ,
A flat press that sandwiches the manufactured wound body in a direction perpendicular to a separation approaching direction of the first winding member and the second winding member of the winding core and presses the flat body into a flat shape. Winding device.

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