JP2001243971A - Reeling device and reeling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the fluctuation of speed in reeling up a plate shape material. SOLUTION: The reeling device comprises a reeling core of non-circular cross section, a roller of which center position of rotation is fixed, a shifting means which shifts the center position of the above reeling core in the prescribed plane, a rotation driving means which rotates the above reeling core around the center position of the reeling core, a controller which simultaneously controls the above shifting means and the above rotation driving means so as to shift the center position of the reeling core periodically at the surrounding place of the above roller in accordance with the rotation of the reeling core in order to reduce the fluctuation of the reeling speed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding device for winding a plate-like member using a winding core having a non-circular cross section. The present invention relates to a winding device and a winding method for forming a battery body by winding a plate-like electrode around a winding core having a non-circular cross section.

[0002]

2. Description of the Related Art Various apparatuses have been proposed as apparatuses for manufacturing a spiral battery by winding an electrode plate using a non-cylindrical winding core. FIG. 20 is a diagram for explaining a conventional winding device for manufacturing a spiral battery disclosed in Japanese Patent Application Laid-Open No. 6-168736. In the figure, 10
Reference numeral 0 denotes a plate-like winding core, and reference numeral 200 denotes a plate-like electrode (referred to as an electrode plate) constituting a battery.

FIG. 1 shows a configuration in which the electrode plate 200 is wound around the winding core 100 by rotating the winding core 100. At this time, the center of rotation of the core 100 is moved along a predetermined circular orbit in accordance with the rotation of the core 100 or the direction in which the core 100 pulls the electrode plate 200. With this configuration, the winding core 100
It is possible to reduce the variation in the magnitude of the pulling force of the electrode plate caused by the rotation of.

[0004] This situation will be specifically described. FIG.
3A, the rotation direction of the winding core 100 and the electrode plate 200
Therefore, the electrode plate 200 is not pulled by the winding core 100 in this state. At this time, the center of rotation of the winding core 100 is moved in the direction in which the electrode plate 200 is pulled. In FIG. 20B, the electrode plate 20
0 in the direction in which the magnitude of the pulling force decreases.
Is moved along the circular orbit. FIG. 20 (c)
In this case, the magnitude of the force by which the electrode plate 200 is pulled by the rotation of the winding core 100 is maximized. In order to reduce the magnitude of the pulling force, the rotation center of the winding core 100 is moved to the left in the drawing.

In FIG. 20D, the center of rotation of the winding core 100 is moved along a circular orbit in a direction in which the magnitude of the pulling force on the electrode plate 200 decreases. In FIG. 20 (e),
The rotation direction of the winding core 100 and the length direction of the electrode plate 200 are in a perpendicular relationship.
Is not pulled by the winding core 100. At this time, core 1
The center of rotation of 00 is moved in the direction in which the electrode plate 200 is pulled. This operation of moving the rotation center of the core 100 on a circular orbit is periodically repeated in accordance with the rotation of the core 100.

[0006]

However, it is difficult to completely eliminate the fluctuation of the speed of the electrode plate by focusing only on the winding core and moving the center of rotation on a straight line or a circular orbit as described above. Further, when winding is performed at a high rotation speed, the fluctuation of the tension accompanying the fluctuation of the winding speed becomes large, and the vibration of the electrode plate 200 is excited or the electrode plate is damaged. There is fear. 20 has no mechanism for pressing an electrode plate, such as a pressing roller, against the winding core.
0 is rotated at high speed, the electrode plate 200 cannot follow the operation of the core 100, and the electrode plate 20
0 could not be wound without any gap. Even if a provisionally driven pressing roller is provided, when the winding core 100 is rotated at high speed, the operation of the winding core 100 cannot be followed.

Further, in the conventional apparatus, since there is a distance between the mechanism for controlling the tension and the winding section, when the electrode plate 200 is cut into a finite length and wound, it is necessary to maintain the tension up to the terminal end thereof. difficult. When the tension is lost,
There is a possibility that wrinkles and winding disorder may occur.

Further, the conventional apparatus does not have a mechanism for winding the electrode plate 200 while applying the adhesive, and cannot manufacture a battery which winds the electrode plate 200 while applying the adhesive to both sides of the electrode. Even if an adhesive application mechanism is added to the manufacturing apparatus in FIG. 20, the position through which the electrode plate 200 sent to the winding core passes through swings in a direction perpendicular to the feeding direction as shown in FIG. When winding while applying the adhesive to the electrode plate 200, the adhesive cannot be applied uniformly to both surfaces of the electrode plate 200. If the adhesive cannot be applied uniformly, the battery performance will be reduced. .

The present invention has been made to solve these problems, and makes it possible to perform high-speed winding by reducing the speed fluctuation when winding a plate-shaped member. An object of the present invention is to provide a winding device and a winding method that cause less damage to members. Furthermore,
It is an object of the present invention to obtain a winding device with less wrinkles and turbulence by applying tension to a terminal end by a roller even for a plate-shaped member having a finite length. Still another object of the present invention is to provide a winding device that winds the core while pressing the core and the roller via a plate-shaped member. Another object of the present invention is to provide a winding device for uniformly applying an adhesive to a plate-like member fed to a core.

[0010]

According to a first aspect of the present invention, there is provided a winding device having a winding core having a non-circular cross section, a roller having a fixed center of rotation, and a center of rotation of the winding core defined by a predetermined plane. Moving means for moving the core, rotation driving means for rotating the core around the position of the center of rotation of the core, and the position of the center of rotation of the core so as to reduce fluctuations in the winding speed. A control means for simultaneously controlling the moving means and the rotation driving means so as to periodically move around the roller in accordance with the rotation of the winding core is provided.

[0011] The winding device according to the present invention is characterized in that an actuator for applying torque to the roller is provided.

The winding device according to the present invention is characterized in that an elastic member is provided on the surface of the roller.

[0013] The winding device according to the present invention is characterized in that it has an adhesive applying means for applying an adhesive to both surfaces of a plate-shaped member to be wound.

According to the winding method of the present invention, there is provided a winding core having a non-circular cross section, a roller having a fixed rotation center, and a moving means for moving the rotation center of the winding core in a predetermined plane. And a rotation driving means for rotating the winding core around the center of rotation of the winding core, wherein a plate-shaped member is wound around the winding core, and the fluctuation of the winding speed is reduced. As described above, while simultaneously controlling the moving means and the rotation driving means so as to periodically move the position of the center of rotation of the core around the roller in accordance with the rotation of the core, the plate-shaped member is It is characterized by winding.

Embodiment 1 Hereinafter, the winding device of the present invention will be described with reference to the drawings. FIG. 1 is a diagram for explaining the winding device of the present embodiment. Also, three axes (X axis, Y axis, Z axis) orthogonal to each other are set as shown in FIG.
Further, the center axis of the rotation center of the winding core 1 is defined as the θ axis. FIG.
Wherein 1 is a winding core whose cross section is non-circular,
The core 1 rotates around its center of rotation. Further, the position of the rotation center of the winding core 1 can be moved in a predetermined plane (in the XZ plane). Reference numeral 2 denotes a roller, and the roller 2 rotates around a rotation center. The position of the rotation center of the roller 2 is fixed. The axis of rotation of the core 1 and the axis of rotation of the roller 2 are parallel to each other, for example, are arranged so as to be parallel to the Y axis. Reference numeral 3 denotes an X-axis actuator which is a first actuator for displacing the position of the rotation center of the winding core 1 in the X-axis direction. Reference numeral 4 denotes a Z-axis actuator which is a second actuator for displacing the position of the rotation center of the winding core 1 in the Z-axis direction. The position of the center of rotation of the winding core by the X-axis actuator 3 and the Z-axis actuator 4 is set in a plane (ie, XZ
(In a plane). Reference numeral 5 denotes a θ-axis actuator which is a third actuator corresponding to a rotation drive unit for rotating the winding core 1 around the θ-axis.

Reference numeral 6 denotes a control unit which is first control means for controlling the rotation of the winding core 1 (θ axis) and the movement of the X and Z axes of the winding core 1 in three axes. Reference numeral 7 denotes a roller driving actuator which is a fourth actuator for rotating the roller 2. The roller driving actuator 7 applies a torque to the roller. Reference numeral 8 denotes a control unit serving as second control means for controlling the torque applied to the roller 2 by the roller driving actuator 7. The control section 8 is for applying an appropriate tension to an electrode plate 9 described later.

Reference numerals 9 and 10 denote electrodes (referred to as electrode plates) which are plate-shaped members, which have different polarities from each other. A flat battery is formed by laminating the electrode plates 9 and 10. Reference numeral 11 denotes an adhesive application unit that is an adhesive application unit that applies an adhesive to both surfaces of the electrode plate 10. Both ends of the electrode plate 9 and the electrode plate 10 coated with the adhesive are attached to the core 1. Electrode plates 9, 10
Are sent to the roller 2 together. The electrode plates 9 and 10 wound around the surface of the roller 2 are wound around the winding core 1.

In the drawing, the winding core 1 has a rhombic cross section and θ
It is rotated by the shaft actuator 5. Further, the X-axis actuator 3 and the Z-axis actuator 4 move the rotation center of the winding core 1 in a plane where the Y-axis value is fixed at a certain value (that is, in the XZ plane). The control unit 6 includes an electrode plate 9,
The position of the center of rotation of the winding core 1 is adjusted to the rotation of the winding core so that the electrode plates 9 and 10 wound around the roller 2 can be wound at a constant speed while the roller 2 and the winding core 1 are in contact with each other via 10. The moving means (that is, the X-axis actuator 3 and the Z-axis actuator 4) and the rotation driving means (that is, the θ-axis actuator 5) are controlled synchronously so as to periodically move in response thereto. The trajectory along which the rotation center of the winding core 1 moves depends on the cross-sectional shape of the winding core 1, the radius of the roller 2, and the thickness of the electrode plates 9 and 10 (however, the thickness of the electrode plates 9 and 10 (If it is sufficiently smaller than the deformation, it may be ignored.)

The roller 2 has a fixed center of rotation, and a torque is applied by a roller drive actuator 7. The roller drive actuator 7 applies a predetermined torque to the roller 2 in a direction opposite to the direction in which the electrode plate 9 and the electrode plate 10 are fed when the electrode plate 9 and the electrode plate 10 are wound by the winding core 1. It is driven by a control command from the control unit 8.

The electrode plate 9 and the electrode plate 10 are wound by the present apparatus. The electrode plates 9 and 10 are wound by the winding core 1 while being in contact with or being pressed against the roller 2 so that the flat electrode plates 9 and 10 are bonded. In addition, a battery that is spirally wound without gaps can be formed. The adhesive application section 11 applies the adhesive uniformly to both surfaces of the electrode plate 10. That is, FIG. 1 shows an apparatus in which the electrode plate 9 and the electrode plate 10 are overlapped with each other while applying an adhesive to both surfaces of the electrode plate 10 and wound around the winding core 1 at a constant speed.

The operation in which the winding core 1 winds the electrode plates 9 and 10 at a constant speed will be described with reference to FIGS. FIG.
Fig. 3 is a diagram for explaining the winding device of the present embodiment, specifically, a diagram showing a state where the winding core 1 of the winding device rotates while moving.

FIG. 3 is a diagram for explaining the winding device of the present embodiment, and more specifically, a graph showing changes in the position and rotation angle of the rotation axis of the winding core 1 with time. It is. 3A shows a change in the movement amount of the rotation center of the winding core 1 in the X-axis direction, FIG. 3A shows a change in the movement amount of the rotation center of the winding core 1 in the Z-axis direction, and FIG. 1 changes the rotation angle θ (rad) and the rotation angle ロ ー ラ (ra
It is a figure which shows the change of d). In FIG. 3, the horizontal axis is time, and T is the time required for the rotation center of the winding core 1 to make a round on a predetermined orbit.

In FIG. 2, reference numeral 20 designates a winding core 1 which is always in contact with the roller 2 via the electrode plate 9 and the electrode plate 10;
Is a trajectory along which the center of rotation of the winding core 1 moves when the electrode plate 9 and the electrode plate 10 are wound while rotating at a constant speed. When the rotation center of the winding core 1 makes a round on a predetermined orbit, the winding core 1
The self rotates π (rad).

2, the rotation angle of the winding core 1 from the state shown in FIG. 2A is θ (rad), the amount of movement in the X-axis direction is X, and the amount of movement in the Z-axis direction is Z. Graphs (A), (A), and (C) of FIG. 3 show the change in the above-mentioned amount due to the movement of the rotation center of the winding core 1. When the cross-sectional shape of the winding core 1 or the radius of the roller 2 changes, the trajectory 20 in FIG. 2, that is, the graphs (A), (A) and (C) in FIG. The value β of θ that maximizes the value also changes.

The operation of starting winding from the state of θ = 0 (rad) in FIG. 2A will be described. First, while maintaining the state where the core 1 is in contact with the roller 2 via the electrode plates 9 and 10, the core 1 is rotated while moving the center of rotation of the core 1 along a predetermined track 20, so that the core 1 is fixed. At the winding speed V. As the winding core 1 is rotated, the side direction of the rhombic cross section of the winding core 1 that contacts the roller 2 via the electrode plates 9 and 10 and the roller 2 that contacts the winding core 1 via the electrode plates 9 and 10 The direction from the contact point to the rotation center of the roller is orthogonal. The rotation angle of the winding core 1 at this time is θ1
And While α>θ> θ1, the winding core 1 is rotated so as to maintain the above-described orthogonal relationship. When θ = α, the amount of movement of the winding core 1 in the negative direction of the X-axis becomes maximum (the value of the X coordinate of the rotation center of the winding core 1 at this time is Xmin).

In the case of π / 2>θ> α, the core 1 is rotated while the portion corresponding to the vertex of the rhombic cross section of the core 1 is in contact with the roller 2 via the electrode plates 9 and 10, and Move the center of rotation. At this time, a portion corresponding to the vertex of the rhombic cross section of the winding core 1 moves at a speed V along the surface of the roller 2. When θ = π / 2, as shown in FIG. 2C, the amount of movement in the negative direction of the Z axis becomes the maximum (the value of the Z coordinate of the rotation center of the winding core 1 at this time is Zmin).

When β>θ> π / 2, the core 1 is rotated while the portion corresponding to the vertex of the rhombic cross section of the core 1 is in contact with the roller 2 via the electrode plates 9 and 10, and Move the center of rotation. At this time, a portion corresponding to the vertex of the rhombic cross section of the winding core 1 moves at a speed V along the surface of the roller 2. When θ = β, as shown in FIG. 2D, the amount of movement of the winding core 1 in the positive X-axis direction is maximized (the value of the X coordinate of the rotation center of the winding core 1 at this time is Xmax). When the cross section of the winding core 1 is rhombic, there is a relationship of -Xmin = Xmax.
Further, when θ = β, the direction from the contact point of the roller 2 that contacts the winding core 1 via the electrode plates 9 and 10 toward the rotation center of the roller 2 and the roller 2 via the electrode plates 9 and 10 are contacted. The side direction of the rhombic cross section of the winding core 1 is orthogonal.

When π>θ> β, the direction from the contact point of the roller 2 in contact with the winding core 1 to the rotation center of the roller 2 is:
The winding core 1 is rotated while maintaining the relationship that the side direction of the rhombic cross section of the winding core 1 is orthogonal.

Then, the state as shown in FIG. 2E is obtained, and the position and angle of the winding core 1 become equal to those in FIG. 2A.

As described above, by repeating the above-described operation, the electrode plates 9 and 10 can be sent out to the winding core 1 at a constant speed V, so that the fluctuation of the tension accompanying the fluctuation of the winding speed can be reduced. It is possible to wind up the electrode plates 9 and 10 by a required amount while doing so, so that the plate-shaped battery in which the plate-shaped batteries are bonded can be spirally wound around the winding core 1 with a smaller gap.

Next, an example of a method of calculating the locus of the center of rotation of the winding core 1 in the above-described operation will be described. Core 1
3 satisfies both the trajectory in the X-axis direction and the trajectory in the Z-axis direction in FIG. 4 to 6 are diagrams for explaining the winding device of the present embodiment, and specifically, are diagrams for explaining a method of calculating a locus along which the rotation center of the winding core 1 moves. Here, the winding core 1 is π
(Rad) A method of calculating a locus along which the rotation center of the winding core 1 moves during rotation will be described. 4 to 6, illustration of the electrode plates 9 and 10 is omitted.

Although the thickness of the electrode plates 9 and 10 is not taken into consideration here, it is needless to say that a more accurate trajectory can be calculated by taking the thickness of the electrode plates 9 and 10 into account. Nor. In this case, the diameter D of the roller described later
The value obtained by adding the thickness of the electrode plates 9 and 10 to this value may be calculated as the diameter of the roller. Further, each time the core 1 makes one rotation, a trajectory considering the thickness of the electrode plates 9 and 10 is calculated, and the rotation center of the core 1 is positioned on the calculated trajectory. The fluctuation of the speed when the reel 10 is wound can be completely eliminated.

[0033] (referred coordinate axes x ^r, a coordinate system defined by z ^r coordinate system r) in FIG. 4 and 5 axes X ^r to the center of rotation of the roller 2 as the origin, which defines the Z ^r. Further, the coordinates of the rotation center of the winding core 1 after the elapse of the time t are represented by (x ^r (t),
z ^r (t)). In the rhombic cross section of the winding core 1, the length of the longer diagonal is W (referred to as the width of the winding core 1), the length of the shorter diagonal is H (referred to as the thickness of the winding core 1), and One vertex connected by a diagonal is S
1, the other vertex is S3, the one vertex connected by the longer diagonal is S2, and the taper angle (1 of the angle formed by the vertex S2)
/ 2) is φ. Further, the diameter of the roller 2 is D.

In FIGS. 4 and 5, a trajectory (first trajectory) is determined in which the winding core 1 is in contact with the roller 2 and the core 1 is translated while rotating the roller 2 at a constant speed. In FIG. 6, the winding core 1 obtained by using FIGS.
The trajectory shown in FIG. 3 (second trajectory) is obtained by converting the trajectory and the rotation angle of the roller 2 around the center of the roller 2 at a constant speed. This is because the trajectory of the winding core 1 is considered separately for parallel movement and rotation. The control unit 6, which is the first control unit, includes an X-axis actuator 3 and a Z-axis actuator which constitute a movement driving unit so that the rotation center of the winding core 1 can periodically move on the track shown in FIG. 4 and a θ-axis actuator 5 which is a rotation driving means.

FIG. 4 (i) shows the state at t = 0, that is, the beginning of winding. As the conditions for determining the trajectory, the width W and thickness H of the winding core 1, the diameter D of the roller 2, and the winding speed V of the electrode plates 9 and 10 are given. Winding speed V ^r from these in the coordinate system r, the time required for the winding core 1 is actually rotated by π (rad) T, it is possible to obtain the taper angle of the winding core 1 phi. These values are as follows:

[0036]

(Equation 1)

FIG. 4 (ii) shows a vertex S1 of a cross section of the winding core 1.
Is a constant speed V on the outer circumference of the roller 2. ^rIn the section to move with
(0 <t ≦ t1). Diamond cross section of winding core 1 at t = t1
At the side connecting the vertices S1 and S2 (referred to as S1-S2)
Is a straight line in contact with the outer circumferential circle of the roller 2. At this time, t
1, ψ (t), x^r(T), z^r(T) is as follows
is there. Ψ (t) is a contact point between the winding core 1 and the roller 2
Of the x-axis, the above-mentioned contact point and the
It is represented by the angle (rad) between the straight line connecting the points and
is there.

[0038]

(Equation 2)

FIG. 4 (iii) is a section in which rhombic cross-section of the side S1-S2 of the winding core 1 moves at a constant velocity V ^r while in contact with each other at the point Pc1 the roller 2 (t1 <t ≦ t2) . t = t
At 2, the vertex S2 coincides with the point Pc1. At this time, t2,
^{ψ (t), x r (} t), z r (t), is as follows.

[0040]

(Equation 3)

FIG. 5 (i) shows the vertex S of the rhombic section of the winding core 1.
Reference numeral 2 ^denotes a section in which the roller 2 moves on the outer circumference circle at a constant speed Vr (t2 <t ≦ t3). At t = t3, the side connecting the vertices S2 and S3 (S2-S3
) Is a straight line tangent to the outer circumference of the roller 2. At this time, t3, ψ (t), x r (t), z r (t), is as follows.

[0042]

(Equation 4)

FIG. 5 (ii) shows the side S of the rhombic section of the winding core 1.
2-S3 is constant speed V while contacting roller 2 at point Pc2.
^r(T3 <t ≦ t4). t = t4
The vertex S3 coincides with the point Pc2. At this time, t4,
ψ (t), x ^r(T), z^r(T) is as follows
You.

[0044]

(Equation 5)

[0045] FIG. 5 (iii) is a section rhombic cross section vertices S3 of the winding core 1 moves periphery circle of the roller 2 at a constant speed ^{V r (t4 <t ≦ T} ). At t = T, the winding core 1 is π
(Rad) It reaches the winding position. At this time,
(T), ^xr (t), ^zr (t) are as follows.

[0046]

(Equation 6)

With the above movement from FIG. 4 (i) to FIG. 5 (iii), the winding core 1 is brought into contact with the roller 2 while maintaining the constant speed ^Vr.
To move from the winding start position to the winding position by π (rad). At this time, the center trajectory of the winding core 1 is given by the following equation (1).
Equations (22), (23aa), and (23b) can be obtained by numerically calculating the following equations from the equations.

Next, in order to obtain the trajectory in the whole coordinate system in FIG. 6, the trajectory of the winding core 1 shown in FIGS.
A coordinate transformation for rotating the roller 2 around the center of the roller 2 at a constant speed by θ (t) represented by the equation (24) is performed. That is, in the whole coordinate system, the orbit of the winding core 1 that winds the electrode plates 9 and 10 at a constant speed is represented by the following equation (24) for the rotation angle θ (t), and the equations for the center positions X (t) and Z (t) respectively. It can be obtained by numerically calculating (25) and equation (26). Also,
At this time, the rotation angle Θ (t) of the roller 2 is expressed by Expression (27).

[0049]

(Equation 7)

In the above example, the trajectory of the winding core 1 is obtained by numerical calculation. However, the equations (1) to (22), (23a) and (23b) are successively calculated by equations (25),
It can also be obtained analytically by substituting into equation (26). Further, the above-described method of deriving the trajectory is merely an example, and the present invention is not limited to this.

In this embodiment, the roller 2 has a surface having no elasticity as an example. However, the roller 2 may be formed by forming an elastic member on the outer periphery of the roller 2 or by itself having the elasticity. Good. The elastic body provided on the surface of the roller 2 may be rubber, for example. FIG. 7 is for explaining another example of the winding device of the present embodiment.

In FIG. 7, an example in which an elastic member is formed on the outer peripheral surface of the roller 2 to form an elastic roller 12 will be described. In FIG. 7, the winding core 1 is always in contact with a virtual roller 13 having a radius smaller by Δ than the elastic roller 12, and is moved and rotated on a track that rotates the virtual roller 13 at a constant speed. Since the core 1 and the elastic roller 12 are always pressed by a constant amount Δ in the radial direction of the elastic roller 12, the electrode plates 9 and 10 can be wound with a smaller gap while being pressed against the core 1 with a constant pressure. It becomes possible.

At this time, if the pressing amount of the core 1 and the elastic roller 12 is appropriately set, the elastic body is deformed by the pressed amount, so that unnecessary excessive force is generated in the core 1 and the elastic roller 2. Absent. Furthermore, since the elastic body is deformed, when the elastic roller 2 is pressed through the electrode plate, the contact area between the electrode plate 9 and the elastic roller 2 increases, so that the electrode plate 9 and the electrode plate 10 are simultaneously pressed. It can be bonded efficiently.

In this embodiment, the electrode plates 9, 10
Although the thickness of the electrode plates 9 and 10 is not taken into account, when the thickness of the electrode plates 9 and 10 is rotated f times (f: natural number), the outer shape of the winding core 1 and the electrode plates 9 and 10 wound therearound is virtually wound. Considering the outer shape of the core 1, a second trajectory corresponding to this shape is calculated, and if the second rotation of the winding core 1 is moved on this trajectory, the speed at which the electrode plates 9 and 10 are wound up is calculated. Can be wound without fluctuation.

FIG. 8 is a diagram for explaining the winding device of the present embodiment, and specifically, a diagram for explaining a more detailed configuration for winding the electrode plate. 8, when the winding core 1 is rotated to wind the electrode plates 9 and 10, a command signal is sent from the control unit 8 to the roller driving actuator 7. The roller driving actuator 7 applies a torque 16 corresponding to the command signal sent in a direction opposite to the direction in which the electrode plate 9 is fed.

Although the roller 2 pulls the electrode plate 9 in the opposite direction to the feed direction by the torque 16, the roller 2 rotates in the direction in which the electrode plate 9 is fed because the winding force of the winding core 1 is larger. When the friction force is small between the roller 2 and the electrode plate 9 with respect to the torque 16 and slip occurs, for example, when the pressing roller 14 is pressed against the roller 2 from above the electrode plate 9, the friction between the roller 2 and the electrode plate 9 is increased. Power can be increased. As a result, it is possible to transmit torque reliably without slipping, and the electrode plate 9
Can be given an appropriate tension. Press roller 14
The roller may be pressed against the roller 2 using its own weight or spring force or a force generated by a driving unit (not shown) using air or electricity.

As described above, tension is applied to the electrode plate 9 by the roller 2 which is closest to the winding core 1, that is, the roller 2 which is always in contact with the winding core 1. Tension is reliably applied to the vicinity, and winding without wrinkles or turbulence becomes possible.

FIG. 9 is a view for explaining the winding device of the present embodiment. Specifically, the tip of an electrode plate (especially, electrode plate 9) which is a plate-like member is connected to the winding core 1. It is a figure for explaining operation at the time of making it. When the roller 2 connects the electrode plate 9 to the winding core 1 at the beginning of winding, a command signal is sent from the control unit 8 to the roller driving actuator 7. Upon receiving the command signal, the roller driving actuator 7 applies a torque 17 in the direction in which the electrode plate 9 is wound around the roller 2. With this configuration, even when the electrode plate 9 is made of a material that is easily bent, the electrode plate 9 can be reliably fed in the direction of the core 1. The leading end of the electrode plate 9 sent out from the roller 2 is attached to the winding core 1 by connecting means (not shown). As a result, it is possible to automatically start winding from a state in which the tip end of the electrode plate 9 is separated from the winding core 1, and to produce a battery that is wound spirally around the winding core 1 with no gap using a flat electrode. Can be.

FIG. 10 is a view for explaining a more specific configuration of the adhesive application section 11 in the winding device of the present embodiment. FIG. 10A is a perspective view of an adhesive application section, and FIG. 10B is a front view. In the figure, an adhesive application section 11 includes two rotatable rollers 21, an adhesive 23 applied to the surfaces of the rollers, and an adhesive 23 provided for each roller 21 and applied to the surface of the rollers 21. And a squeegee 22 for adjusting the thickness. Two rollers 21
Are located close to each other and rotate in opposite directions.
The electrode plate 10 is located between the two rollers 21 and is sent out while being pressed by the rotation of the two rollers 21. When the electrode plate 10 is pressed by the two rollers 21, an adhesive is attached to both surfaces.

More specifically, the two application rollers 21 have their rotation center axes parallel to each other and leave a gap by g, and the electrode plate 10 is perpendicular to the rotation center axis of the application roller 21 and passes through the center of the gap g. So that The application roller 21 is rotated by a driving means (not shown) in a direction in which the electrode plate 10 is sent to the roller 2. The adhesive 23 is supplied near (a) on the rotating application roller 21 and is smoothed by the squeegee 22 so that the thickness becomes uniform.

To apply the adhesive 23 to the electrode plate 10,
As described above, the thickness of the adhesive 23 on the application roller 21 is smoothed by the squeegee 22, and the electrode plate 10 is passed between the application rollers 21 to which the adhesive 23 is supplied, so that the adhesive is applied to both surfaces of the electrode plate 10. Adhesive 23 on roller 21
Is transferred. Further, since the electrode plate 10 passes on a constant straight line at a constant speed, the adhesive 23 can be stably and uniformly applied to both surfaces. The amount of the adhesive 23 applied is determined by the squeegee 22 and the application roller 2
It can be adjusted by changing the gap h of one, the gap g between the two application rollers 21, and the rotation speed of the application roller 21.

Embodiment 2 In the first embodiment, the cross section of the winding core 1 is rhombic, but here, the cross section is rectangular. 11 to 14
FIG. 3 is a diagram for explaining the winding device of the present embodiment, and specifically, a diagram for explaining a calculation method of a trajectory along which the rotation center of the winding core 1 moves. Here, the winding core 1
The method of calculating the trajectory in which the rotation center of the winding core 1 moves while the rotation of (rad) will be described. In the description of FIGS. 11 to 14, illustration of the electrode plates 9 and 10 is omitted. In the figures, the components denoted by the same reference numerals as those in FIGS. 4 to 6 are the same or equivalent. In the figure, reference numeral 1 denotes a winding core whose cross section is non-cylindrical, and the cross section of the winding core 1 is rectangular.

In FIGS. 11 to 14, coordinate axes X ^r and Z ^r having the origin at the rotation center of the roller 2 are defined (coordinate axes x ^r ,
a coordinate system that is defined in the z ^r referred to as the coordinate system r). Further, the coordinates of the rotation center of the winding core 1 after the elapse of the time t (here, the coordinates of the intersection of the diagonal lines of the rectangle) are represented by (x ^r (t), z
^r (t)). In the rectangular cross section of the winding core 1, the length of the long side is W (referred to as the width of the winding core 1), the length of the short side is H (referred to as the thickness of the winding core 1), and one of the short sides is connected by the short side. The vertex is S5, the other vertex is S6, and the midpoint of the long side is S4 and S7. Further, the diameter of the roller 2 is D.
As in the first embodiment, the thickness of the electrode plates 9 and 10 is not taken into account. However, if the thickness of the electrode plates 9 and 10 is taken into account, a more accurate trajectory can be calculated. Not even.

FIG. 11 (i) shows the state at t = 0, that is, the state at the start of winding. In the state at the start of winding, the middle point S4 and the roller 2 are in contact. Core 1 as a condition to determine the orbit
Width W, thickness H, diameter D of roller 2, electrode plates 9 and 1
A winding speed V of 0 is given. Winding speed V ^r from these in the coordinate system r, winding core 1 can determine the time T required to rotate by π (rad). These values are as follows:

[0065]

(Equation 8)

[0066] Figure 11 (ii) is a section moves at a constant velocity V ^r while in contact with the roller 2 in the winding core 1 of the long sides point cross Pc3 (0 <t ≦ t1) . At t = t1, the vertex S5 in the rectangular cross section of the winding core 1 contacts the outer circumferential circle of the roller 2. At this time, t1, ψ (t), ^xr (t), z
^r (t) is as follows.

[0067]

(Equation 9)

[0068] FIG. 12 (i) is a winding section rectangular cross section vertices of S5 in the core 1 moves periphery circle of the roller 2 while being in contact with the roller 2 at a constant speed ^{V r (t1 <t ≦ t2} ).
At t = t2, the vertex S5 matches the point Pc4. At this time,
t2, ψ (t), x r (t), z r (t), is as follows.

[0069]

(Equation 10)

[0070] Figure 12 (ii) is a section that moves the winding core 1 of rectangular constant velocity V ^r short side while in contact with each other at the point Pc4 the roller 2 of the cross section (t2 <t ≦ t3). At t = t3, the vertex S6 of the winding core 1 contacts the outer peripheral circle of the roller 2 (point Pc4). At this time, t3, ψ (t), ^xr (t), z
^r (t) is as follows.

[0071]

[Equation 11]

FIG. 13 (i) shows the top of a rectangular cross section of the winding core 1.
While the point S6 is in contact with the roller 2,
Constant speed V^r(T3 <t ≦ t4).
At t = t4, the vertex S6 matches the point Pc5. This and
T4, ψ (t), x ^r(T), z^r(T) is
It is on the street.

[0073]

(Equation 12)

[0074] Figure 13 (ii) is a section that moves the winding core 1 of rectangular cross-section constant velocity V ^r while in contact with the roller 2 in the long sides point Pc5 of (t4 <t ≦ T). Midpoint S at t = T
7 is in contact with the roller 2 (point Pc5), and the core 1 is π (ra
d) Reach the winding position. At this time, ψ (t),
x ^r (t) and z ^r (t) are as follows.

[0075]

(Equation 13)

With the above movements of FIGS. 11 (i) to 13 (ii), the winding core 1 is brought into contact with the roller 2 while maintaining the constant speed ^Vr.
To move from the winding start position to the winding position by π (rad). The trajectory of the center of the winding core 1 at this time is represented by the formula (2)
It can be obtained by numerically calculating the expressions (8) to (50) sequentially.

Next, in order to determine the trajectory in the whole coordinate system in FIG. 14, the trajectory of the winding core 1 shown in FIGS. 11 to 13 is rotated by θ (t) expressed by the equation (51) in FIG. 2. Perform coordinate transformation for rotating around the center of 2 at a constant speed.
That is, in the whole coordinate system, the trajectory of the winding core 1 that winds the electrode plates 9 and 10 at a constant speed has a rotation angle θ (t) of (5
1) Equations and the center positions X (t) and Z (t) can be obtained by numerically calculating Equations (52) and (53), respectively. Further, the rotation angle Θ (t) of the roller 2 at this time is expressed by the following equation (54).

[0078]

[Equation 14]

FIG. 15 is a diagram for explaining the winding device of the present embodiment, and more specifically, a graph showing changes in the position of the rotation center and the rotation angle of the winding core 1 with time. It is. In FIG. 15, (a) shows a change in the amount of movement of the rotation center of the winding core 1 in the X-axis direction, (a) shows a change in the amount of movement of the rotation center of the winding core 1 in the Z-axis direction, and (c) shows a change in the winding core. 1
Of the rotation angle θ (rad) of the roller 2, the rotation angle of the roller 2 Θ
It is a figure showing a change of (rad). In the figure, the horizontal axis is time, and T is the time required for the rotation center of the winding core 1 to make a round on a predetermined orbit. As described above, according to the present embodiment, even if the cross section of the core 1 is rectangular,
Can be wound up at a constant speed.

Embodiment 3 In the first embodiment, the cross section of the winding core 1 is a rhombus, but here, the cross section is characterized by an oval. 16 to 18
FIG. 3 is a diagram for explaining the winding device of the present embodiment, and specifically, a diagram for explaining a calculation method of a trajectory along which the rotation center of the winding core 1 moves. Here, the winding core 1
The method of calculating the trajectory in which the rotation center of the winding core 1 moves while the rotation of (rad) will be described. In the description of FIGS. 16 to 18, the illustration of the electrode plates 9 and 10 is omitted. In the figures, the components denoted by the same reference numerals as those in FIGS. 4 to 6 are the same or equivalent.

[0081] (referred coordinate axes x ^r, a coordinate system defined by z ^r coordinate system r) in 16 to 18 coordinate axes X ^r to the center of rotation of the roller 2 as the origin, which defines the Z ^r. Furthermore,
The coordinates of the rotation center of the winding core 1 after the elapse of the time t are represented by (x
^r (t), ^zr (t)). In the oval cross section of the winding core 1, the maximum value of the length of the long side is W (referred to as the width of the winding core 1), the length of the short side is H (referred to as the thickness of the winding core 1), Points at which the length starts to change are referred to as S9 and S10, respectively. In the oval cross section of the winding core 1, the middle points of the long sides are S8 and S11, respectively. Further, the diameter of the roller 2 is D. As in the first embodiment, the thickness of the electrode plates 9 and 10 is not taken into account. However, if the thickness of the electrode plates 9 and 10 is taken into account, a more accurate trajectory can be calculated. Not even.

FIG. 16 (i) shows the state at t = 0, that is, the state at the start of winding. In the state at the start of winding, the middle point S8 and the roller 2 are in contact. Core 1 as a condition to determine the orbit
Width W, thickness H, diameter D of roller 2, electrode plates 9 and 1
A winding speed V of 0 is given. Winding speed V ^r from these in the coordinate system r, winding core 1 can determine the time T required to rotate by π (rad). These values are as follows:

[0083]

(Equation 15)

[0084] Figure 16 (ii) is a section moves at a constant velocity V ^r while in contact with the roller 2 in the winding core 1 of the long sides point cross Pc6 (0 <t ≦ t1) . At t = t1, the point S9 coincides with Pc6 of the roller 2 in the oval cross section of the winding core 1. At this time, t1, ψ (t), ^xr (t), z
^r (t) is as follows.

[0085]

(Equation 16)

[0086] Figure 17 (i) is a winding section point Pc7 on the arc of the oval cross section of the core 1 moves periphery circle of the roller 2 while being in contact with the roller 2 at a constant speed V ^r (t1 <t ≦
t2). At t = t2, the point S10 coincides with the point Pc8. At this time, t2, ψ (t), x r (t), z r (t), is as follows.

[0087]

[Equation 17]

[0088] Figure 17 (ii) is a section where the long side of the oval cross section of the winding core 1 moves at a constant velocity V ^r while in contact with each other at the point Pc8 the roller 2 (t2 <t ≦ T) . At t = T, in the oval cross section of the winding core 1, the middle point S 11 is the roller 2 (point P).
c8), and reaches a position where the winding core 1 winds up by π (rad). At this time, ψ (t), x ^r (t), z
^r (t) is as follows.

[0089]

(Equation 18)

With the above movement of FIGS.
Is constant speed V while contacting roller 2. ^rAt the beginning of the winding
From the position to the winding position by π (rad). this
The trajectory of the center of the winding core 1 at the time is obtained from the equation (55) according to the equation (6).
9) It can be obtained by numerically calculating the equation in order.
Wear.

Next, in order to obtain the trajectory in the overall coordinate system in FIG. 18, the roller 2 is moved by θ (t) expressed by the following equation (70) with respect to the trajectory of the winding core 1 shown in FIGS.
Coordinate transformation is performed to rotate at a constant speed around the center of. That is, in the entire coordinate system, the trajectory of the winding core 1 that winds the electrode plates 9 and 10 at a constant speed has a rotation angle θ (t) of (70).
The formula and the center positions X (t) and Z (t) are obtained by numerically calculating formulas (71) and (72), respectively. Further, the rotation angle Θ (t) of the roller 2 at this time is expressed by the following equation (73).

[0092]

[Equation 19]

FIG. 19 is a diagram for explaining the winding device of the present embodiment, and more specifically, a graph showing changes in the position of the rotation center and the rotation angle of the winding core 1 with time. It is. In FIG. 19, components denoted by the same reference numerals as those in FIG. 3 are the same or corresponding components. According to the present embodiment, the winding core 1 can be wound at a constant speed even when the cross section of the winding core 1 is an elliptical shape. Furthermore, since the shape of the winding core 1 is elliptical, there is no angular portion, so that the winding operation can be performed without damage by the electrode plates 9 and 10 during the winding operation. In the above embodiments, the cross-sectional shape of the winding core 1 has been described as a rhombus, a rectangle, and an oval shape. However, the shape is not limited to these, and the cross-sectional shape of the winding core 1 is a polygon. Alternatively, any shape may be used as long as it has a shape having a curve in a part thereof and the roller 2 can be in contact with the entire circumference.

Further, in the method of calculating the first trajectory of the winding core 1, when one side of the cross section of the winding core 1 is in contact with the roller 2, the winding is performed while maintaining the side in contact with the roller 2. When the roller 2 is in contact with one vertex of the cross section of the winding core 1 so that the core 1 is moved in parallel, the vertex is moved along the outer periphery of the roller 2 so that the winding core 1 is parallelized. When the roller 2 is in contact with the curved portion of the cross section of the winding core 1, the position of contact between the curved portion and the roller 2 is maintained while maintaining the state where the curved portion is in contact with the roller 2. The first trajectory can be obtained by calculating a trajectory that moves the winding core 1 in parallel by moving it along the outer circumference of the roller 2.
Further, by rotating the first trajectory around the center of the roller 2, the trajectory on which the winding core 1 actually moves, that is, the second trajectory can be obtained.

[0095]

According to the winding device of the present invention,
A core having a non-circular cross-section, a roller having a fixed center of rotation, a moving means for moving the center of rotation of the core within a predetermined plane, and a center of rotation of the core. Rotation driving means for rotating the winding core, and the position of the rotation center of the winding core is periodically moved around the roller in accordance with the rotation of the winding core so as to reduce the fluctuation of the winding speed. And control means for simultaneously controlling the moving means and the rotary drive means.
The fluctuation of the speed at the time of winding on the winding core can be made smaller, so that the fluctuation of the pressure when pressing the plate-like member to be wound can be made smaller, and the plate shape wound on the winding core can be reduced. It is possible to reduce the gap between the members and take up, and even if the winding speed of the winding core is increased, the fluctuation of the tension accompanying the fluctuation of the winding speed is small, so that the damage to the plate-shaped member is reduced. Can be reduced.

In the winding device according to the present invention, since the actuator for applying torque to the roller is provided, the roller which comes into contact with the core via the plate member to be wound is applied to the plate member at the position closest to the core. Since tension can be applied, it is possible to wind up a plate-shaped member having a finite length while reducing tension and wrinkles while reliably applying tension to the vicinity of the terminal end.

In the winding device according to the present invention, since the elastic member is provided on the surface of the roller, the plate member to be wound can be wound without generating unnecessary excessive force on the winding core and the elastic roller. Can be wound up.

Since the winding device according to the present invention has adhesive applying means for applying an adhesive to the plate-shaped member to be wound, the plate-shaped member can be kept wound around the winding core without any gap. it can. Furthermore, if the plate-like member to be wound is sent out at a constant speed, the adhesive can be uniformly applied to the surface of the plate-like member, and the plate-like member is stuck without gaps. Can be matched.

According to the winding method of the present invention, the winding core having a non-circular cross section, the roller having the fixed rotation center, and the rotation center of the winding core are moved in a predetermined plane. A method of winding a plate-like member around the core using a moving unit and a rotation driving unit configured to rotate the core around a position of a center of rotation of the core. While simultaneously controlling the moving means and the rotation driving means so as to periodically move the position of the center of rotation of the winding core around the roller according to the rotation of the winding core so as to reduce the plate-like shape, Since the member is wound, the fluctuation of the speed at the time of winding on the winding core can be made smaller, whereby the fluctuation of the pressure when pressing the plate-shaped member to be wound can be made smaller, On the core Since the winding can be performed with a smaller gap between the plate-shaped members to be wound and the fluctuation of the tension accompanying the fluctuation of the winding speed is small even if the winding speed of the winding core is increased, the plate-shaped member can be wound. It can reduce the damage to you.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a winding device according to an embodiment.

FIG. 2 is a diagram illustrating a winding device according to the present embodiment.

FIG. 3 is a diagram illustrating a winding device according to the present embodiment.

FIG. 4 is a diagram illustrating a winding device according to the present embodiment.

FIG. 5 is a view for explaining the winding device of the present embodiment.

FIG. 6 is a diagram for explaining the winding device of the present embodiment.

FIG. 7 is a diagram for explaining the winding device of the present embodiment.

FIG. 8 is a diagram for explaining the winding device of the present embodiment.

FIG. 9 is a diagram for explaining the winding device of the present embodiment.

FIG. 10 is a diagram illustrating a winding device according to the present embodiment.

FIG. 11 is a diagram for explaining the winding device of the present embodiment.

FIG. 12 is a diagram for explaining a winding device according to the present embodiment.

FIG. 13 is a view for explaining the winding device of the present embodiment.

FIG. 14 is a view for explaining the winding device of the present embodiment.

FIG. 15 is a diagram for explaining the winding device of the present embodiment.

FIG. 16 is a view for explaining the winding device of the present embodiment.

FIG. 17 is a diagram for explaining the winding device of the present embodiment.

FIG. 18 is a view for explaining the winding device of the present embodiment.

FIG. 19 is a view for explaining the winding device of the present embodiment.

FIG. 20 is a view for explaining a conventional winding device.

[Explanation of symbols]

1: winding core 2: roller 3: X
Axis actuator 4: Z-axis actuator 5: θ-axis actuator 6: Control unit 7: Roller driving actuator 8: Control unit 9: Electrode 10: Electrode 11: Adhesive application unit 12: Elastic roller 13: Virtual roller 14: Press roller 15: Pressing force 16: Torque 17:
Torque 20: track 21: coating roller 22: squeegee 23: adhesive

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masamitsu Okamura 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term (reference) 3F055 AA09 BA25 CA24 DA04 EA01 4F042 AA22 BA04 BA06 BA08 DF20 DF23 5H028 BB08 BB17 CC12 5H050 AA19 GA09 GA29

Claims (5)

[Claims] 1. A winding core having a non-circular cross section, a roller having a fixed rotation center, a moving means for moving the rotation center of the winding core in a predetermined plane, and a rotation of the winding core. Rotation driving means for rotating the winding core around a center position, and periodically changing the position of the rotation center of the winding core according to the rotation of the winding core so as to reduce the fluctuation of the winding speed. A winding device comprising: a control unit that simultaneously controls the moving unit and the rotation driving unit so as to move around the periphery. 2. The winding device according to claim 1, further comprising an actuator for applying a torque to the roller. 3. The winding device according to claim 1, wherein an elastic member is provided on a surface of the roller. 4. The winding device according to claim 1, further comprising an adhesive applying unit that applies an adhesive to both surfaces of the plate-shaped member to be wound. 5. A core having a non-circular cross section, a roller having a fixed center of rotation, a moving means for moving the center of rotation of the core in a predetermined plane, and rotation of the core. A plate-shaped member wound around the core using a rotation driving means for rotating the core around a center position, the method comprising: rotating the core so as to reduce fluctuations in the winding speed. The plate-like member is wound while simultaneously controlling the moving unit and the rotation driving unit so that a center position is periodically moved around the roller according to the rotation of the winding core. Winding method.