JP6757201B2 - Raw fabric processing method and its equipment and tab removal processing method using the equipment - Google Patents

Description

According to the present invention, a tab can be formed on a raw fabric for producing an electrode sheet used for a lithium secondary battery, a lithium capacitor, an electric double layer capacitor, etc., which is accurately divided into two or two parts under a high-speed moving state. The present invention relates to an epoch-making method for processing raw fabric, its device, and a tab punching method using the device.

Non-aqueous electrolyte secondary batteries, such as lithium-ion secondary batteries, take advantage of their high energy density, and are used in a variety of electronic devices such as mobile phones and personal computers, and large in hybrid or electric vehicle storage devices. It is used for electronic parts of. The electrode assembly, which is the main internal structure of a lithium-ion secondary battery, can be wound by laminating positive and negative electrode bands with active material coated on metal foil and a separator, or from the original fabric. There is a laminated type in which positive and negative electrode sheets cut out in a rectangular shape and a separator are alternately laminated. The above structure is the same for lithium capacitors and electric double layer capacitors.

These electrode assemblies are configured according to the size of the electronic components used. On the other hand, the raw material, which is the raw material of the electrode assembly, has positive or negative active material on one side or both sides of a metal leaf such as aluminum or copper, which is wide in terms of productivity, in a strip shape and length in almost the entire width. It is composed of an electrode portion coated in the direction and a non-active material coated portion (this portion is referred to as an ear portion) provided on both sides of the electrode portion to which the active material is not coated.
The original fabric is generally wound around the center line and is in the form of a roll. Then, the raw fabric roll is attached to one end of the processing device, the drawn end of the raw fabric is attached to the winding roll at the other end of the processing device, and while unwinding, for example, a laser beam is used to slit the required width according to the application. (Patent Documents 1 and 2).
Further, a device for cutting out a tabbed electrode sheet from an intermittently moving original fabric with a laser beam is also disclosed (Patent Document 3).

Recently, in such a raw fabric processing apparatus, further improvement in processing speed and processing accuracy (for example, several times that of the conventional apparatus) is required.
The front and back surfaces of the raw metal foil are coated with an active material layer with slight variations in thickness. This is wound on the raw fabric delivery shaft, set in the raw fabric delivery part of the raw fabric processing device, laser-processed while unwinding, and transferred to the winding side, between the unwinding side and the winding side. A slight twist occurs, and the original fabric moves in a slightly meandering state. In the current equipment, when the raw fabric is processed with a laser beam, the cutting line also meanders due to the influence of this meandering, and there is a problem that it cannot be cut linearly with the required accuracy.

Japanese Unexamined Patent Publication No. 2011-156540 JP-A-2007-14993 Japanese Unexamined Patent Publication No. 2015-188908

The conventional raw fabric processing device is a large-scale device that extends to several meters and has a limit in accuracy, and the parallelism between the center line of the raw fabric sending part and the winding part that are far away is also limited. Affects the meandering of.
Moreover, since the roll of the raw fabric to be handled is also heavy, it is not easy to correct meandering in the high-speed feed state, and it has been said that the conventional raw fabric processing apparatus cannot expect high-precision raw fabric processing.
According to the present invention, by devising the laser processing point of the raw fabric, the raw fabric processing device can perform the raw fabric processing with the required high accuracy and high speed even though the raw fabric processing apparatus is large. And to provide the device.

The inventor stated, "The raw fabric 1 is unwound from the raw fabric roll 1f, which is a heavy object, from the raw fabric sending unit 10 of the raw fabric processing device A at high speed, and when it is fed straight, it meanders slightly to the left and right. In order to achieve the above-mentioned object of "cutting the unwinding portion 3 of the original fabric 1 moving at high speed into two equal parts with the laser beam L even in the state of being meandered", FIGS. 2 (a) and 2 (b) are shown. As shown, the laser beam L is applied to the center point P0 of the unwinding portion 3 of the original fabric 1, which is the point where the machine center point P0'of the apparatus A, which is the part where the displacement due to meandering is the smallest, overlaps in a plan view. And said.
As described above, the thickness of the active material layer coated on the surface of the metal foil 4 is slightly thin, and the raw material roll 1f wound around the raw material sending shaft 1g is immediately unwound. Meandering occurs in the unwinding portion 3 of the anti-1.
Further, the original fabric 1 is divided into two equal parts, and half-width original fabrics 1'are sent side by side in the winding direction, and are individually wound by the winding unit 12. The half-width original fabric 1'of the winding portion 12 may be wound simultaneously on one shaft, or may be provided with winding shafts 2g1 and 2g2 on the front and rear and wound separately. The method for dividing the original fabric 1 of the present invention into two equal parts is as follows.

Claim 1 is a raw fabric processing method that achieves the above object (dividing the raw fabric 1 into two equal parts).
The raw fabric roll 1f of the raw fabric 1 for producing the electrode sheet used for the power storage device, in which the active material layer is coated on at least one surface of the long metal foil 4, is unwound on the upstream side and is wound on the downstream side. A pair of left and right half-width raw fabrics 1'that are cut into two equal parts and transported side by side are wound up on the downstream side by laser cutting the center of the unwinding portion 3 of the raw fabric 1 that is moving toward it. It is an anti-processing method
The center line in the longitudinal direction of the unwinding portion 3 of the original fabric 1 is defined as the original fabric center line CLx.
A parallel line parallel to the center line CLf passing through the rotation center of the original roll 1f and located on the upstream end 3f of the unwinding portion 3 of the original fabric 1 is defined as a parallel line CLf'.
When the parallel line parallel to the center line CLr passing through the rotation center of the take-up roll 2r and located on the downstream end 3r of the unwinding portion 3 of the original fabric 1 is defined as the parallel line CLr'.
The midpoint between the intersection Pf of the original fabric center line CLx and the parallel line CLf'and the intersection Pr of the original fabric center line CLx and the parallel line CLr'is set as the center point P0 of the unwinding portion 3.
It is characterized in that the meandering amount of the original fabric 1 during transportation is measured, and the meandering correction is performed according to the measured value, and the laser beam L is irradiated to the center point P0.

The laser processing point in the original fabric processing method according to the present invention is the center point P0 of the unwinding portion 3 (the plane portion from the parallel line CLf'to the parallel line CLr') of the original fabric 1 in a plan view.
In other words, assuming that the straight line in the width direction (crossing direction) of the original fabric 1 passing through the center point P0 is CLy, the distance D from the straight line CLy to the parallel line CLf'and the distance D from the straight line CLy to the parallel line CLr' Is equal, and the distance G from the center line CLx of the original fabric 1 to the side surface 4a of the original fabric 1 is equal.
The upstream end 3f and the downstream end 3r of the unwinding portion 3 are lines corresponding to the parallel line CLf'and the parallel line CLr'.
As a result, even if meandering occurs in the feed of the original fabric 1, the amount of displacement C1'and C2'due to the meandering at the processing point, which is the center point P0 of the unwinding portion 3, is the amount of meandering C1. Since it is minimized compared to C2, even if meandering occurs in the feed of the original fabric 1, the original fabric 1 is divided into two equal parts with the required high accuracy and high speed by the meandering detection and its correction. Can be performed (Fig. 2 (b)). Details will be described later.

As described above, the pair of half-width original fabrics 1'may be wound by one winding shaft 2g as shown in FIGS. 1 and 2, but before and after as shown in FIG. The two winding rolls 2r1 and 2r2 arranged in the above may be separately wound by the winding shafts 2g1 and 2g2. In this case, the center line CLr is the center line of one of the take-up shafts 2g1 and 2g2. In this embodiment, the center line of the take-up shaft 2g1 farther from the original fabric delivery unit 10 is CLr.

The inventor has invented the raw fabric cutting method as a method for achieving the above object, but in order to carry out the method, the machine center point P0 of the raw fabric processing apparatus A according to the present invention described later in plan view. ', Set the original fabric 1 in the main original fabric processing device A so that the center line CLx of the original fabric 1 overlaps, and the unwinding portion 3 of the original fabric 1 located above the machine center point P0'. It is necessary to irradiate the center point P0 with the laser beam L to cut it. The configuration of the device A that implements such a method is as follows.

2. The raw fabric processing apparatus A that implements the raw fabric processing method of claim 1 is used.
The raw fabric roll 1f of the raw fabric 1 for producing the electrode sheet used for the power storage device, in which the active material layer is coated on at least one surface of the long metal foil 4, is unwound on the upstream side, and the raw fabric 1 is wound. A raw fabric processing device A that irradiates the ejection portion 3 with a laser beam L and winds up a pair of left and right half-width raw fabrics 1'divided into two equal parts on the downstream side.
A pair of left and right original fabric roll support pedestals 10s that rotatably support both ends of the original fabric delivery shaft 1g around which the original fabric 1 is wound are provided, and an original fabric delivery unit 10 that unwinds and sends out the original fabric 1
A pair of left and right take-up roll supports that are installed parallel to the original fabric delivery shaft 1 g and rotatably support both ends of the take-up shaft 2 g for winding the half-width original fabric 1'divided into two equal parts. A winding unit 12 having a gantry 12s and winding the pair of left and right half-width original fabrics 1'divided,
A horizontal holding portion 11 provided between the raw fabric sending portion 10 and the winding portion 12 and horizontally holding the unwinding portion 3 unwound from the raw fabric sending portion 10.
On the center line CLf of the original fabric delivery shaft 1 g suspended between the original fabric roll support pedestals 10s,
The midpoint between the original roll support mounts 10s is set as the midpoint Cf.
When the midpoint between the take-up roll support mounts 12s is the midpoint Cr on the center line CLr of the take-up shaft 2 g suspended between the take-up roll support mounts 12s.
With respect to the machine center line CLx'connecting the midpoint Cf and the midpoint Cr, the reference position setting unit K for matching the original fabric center line CLx in the longitudinal direction of the original fabric 1 in a plan view,
The vertical line set at the machine center point P0', which is the midpoint between the midpoints Cf and Cr, is defined as the machine center axis H.
Assuming that the intersection of the machine central axis H and the unwinding portion 3 of the original fabric 1 is the processing point P0, the laser emitting device 30 that emits the laser beam L to the processing point P0
A meandering detection device 15 for detecting the meandering of the original fabric 1 and
It is composed of a meandering correction device 10u (12u) provided in at least one of the original fabric sending unit 10 and the winding unit 12.
At least one of the meandering correction devices 10u (12u) is translated along the center line CLf of the original fabric delivery unit 10 or the center line CLr of the winding unit 12 according to the detection output from the meandering detection device 15. It is characterized by letting it.

As described above, in the original fabric processing apparatus A, there are cases where the winding shaft 2g of the winding portion 12 is one shaft and two shafts (the winding shafts in this case are indicated by 2g1 and 2g2, respectively). is there. In the case of two axes, the center line CLr is the center line of one of the take-up shafts 2g1 and 2g2. In this embodiment, the center line of the take-up shaft 2g1 farther from the original fabric delivery unit 10 is CLr.

In the configuration of the present device A, the machine center line CLx'and the machine center axis H, the machine center axis H and the original fabric center line CLx, the machine center line CLx' and the original fabric sending shaft 1 g, the center line CLf, and the take-up shaft 2 g. The center lines CLr are orthogonal to each other. Then, due to the action of the reference position setting unit K, the original fabric center line CLx of the original fabric 1 uniquely matches the machine center line CLx'in the plan view shown in FIGS. 2 (a) and 2 (b). As already mentioned, the meandering of the original fabric 1 (in FIG. 2 (b), the meandering original fabric 1 is indicated by a two-dot chain line) becomes a straight feed (in FIG. 2 (b), indicated by a solid line). On the other hand, this occurs because the unwinding portion 3 of the original fabric 1 is transported with a slight inclination to the left and right. It is exaggerated in the figure.
As described above, the original roll 1f is formed by coating the metal foil 4 with an active material layer having a slight unevenness in thickness, so that meandering already occurs in the portion immediately after unwinding. As will be described later, by setting the center point P0 located directly above the machine center point P0'as the laser processing point, the original fabric 1 can be divided into two equal parts while minimizing the influence of meandering. The meandering is controlled by the meandering detecting device 15 and the meandering correcting device 10u (12u), and is configured to minimize the influence of the meandering.
Since the horizontal holding portion 11 for horizontally holding the unwinding portion 3 unwound from the raw fabric sending portion 10 is provided between the raw fabric sending portion 10 and the winding portion 12, the unwinding portion 3 is provided. Even if the original roll 1f becomes thinner and the take-up roll 2r becomes thicker due to winding, the horizontal position of the processing point P0 does not change, and the original roll 1 is divided into two under the same conditions. Will be done.

By the action of the meandering detection device 15 and the meandering correction device 10u (12u) , even if meandering occurs in the moving original fabric 1, the meandering correction device 10u (12u) immediately eliminates the meandering, and the winding unit 12 uses a laser. The processed pair of left and right half-width original fabrics 1'will be rolled up neatly in a juxtaposed state.
The meandering detection device 15 and the meandering correction device 10u (12u) may be attached to both sides of the original fabric sending portion 10 side and the winding portion 12 side, or only one of them may be attached.
Further, the take-up side meander correction device 12u may have a case where the take-up portion 12 has one axis and a case where the take-up portion 12 has two axes as described above. In the case of two axes, the take-up side meander correction devices 12u1 and 12u2 Each will be prepared. Further, in this case, the take-up side meander detection device 15r may be individually installed at the take-up portion of the half-width original fabric 1'.

The invention according to claim 3 relates to the installation location of the meandering detection device 15 according to claim 2 .
In the original fabric processing apparatus A according to claim 2 ,
The meandering detection device 15 is characterized in that it is installed in at least one of the horizontal holding portion 11 immediately after unwinding from the raw fabric sending unit 10 and the horizontal holding portion 11 immediately before winding the winding unit 12. ..

The installation location is where the meandering amounts C1 and C2 of the original fabric 1 are the largest, and even a slight meandering can be detected sensitively, and can be corrected when a small meandering occurs.

In the invention described in claim 4 , the tab cutting process by the laser beam L is performed on the selvage portion 1b to which the active material of the tab forming raw fabric 1'is not coated by using the raw fabric processing apparatus A according to claim 2. (FIGS. 10 (a) to 10 (c)).
The tab-forming raw fabric 1'has an active material coated portion 1a in which an active material is coated on at least one surface of a long metal foil 4, and at least one side surface 4a of the metal foil 4 and an active material coated portion 1a. Has an ear portion 1b formed between and without coating of active material,
In a plan view, the tab forming raw fabric roll 1f'is attached to the raw fabric sending portion 10 so that the machine center line CLx'passes through the cutout range of the tab 5 of the selvage portion 1b, and then the tab forming raw fabric 1f'. 'Unwind, and attach the end of the unwinding portion 3'to the winding shaft 2g of the winding portion 12.
After that, the original fabric sending unit 10 and the winding unit 12 are rotated synchronously to move the tab-forming original fabric 1'from the original fabric sending unit 10 toward the winding unit 12.
In a plan view, the laser beam L is moved with the processing point P0 on the selvage 1b corresponding to the machine center point P0'on the machine center line CLx'as the processing start point, the selvage 1b is cut out, and the tab 5 is attached to the selvage 1b. Is characterized by forming.

In this case, the cutting process start point P0 by the laser beam L is in any of the cutting ranges of the tab 5. Since the machining start point P0 coincides with the machine center point P0'of the apparatus A in a plan view, the influence of meandering is minimal, but the influence of meandering increases slightly as the distance from the point Pa increases. However, since the tab 5 itself is not large, it is finished with an accuracy that does not hinder practical use.

The invention as set forth in claim 5, a first method of performing a tab cut-out processing according to claim 4 (FIG. 10 (a)), the tab cutout method according to claim 4,
The position where the machine center line CLx'passes through the cutout range of the tab 5 of the selvage portion 1b is characterized by being the boundary line 1c between the selvage portion 1a and the selvage portion 1b in a plan view.

The invention according to claim 6 (second tab processing method (FIG. 10 (b)) is the opposite of claim 5, and the processing start point is the point Pc which is the tip of the selvage portion 1b away from the boundary line 1c. In the tab cutting method according to claim 4,
The position where the machine center line CLx'passes through the cutout range of the tab 5 of the selvage portion 1b is a point in a plan view from the boundary line 1c toward the side 4a and before the side 4a, which is the tip of the tab 5. It is characterized by being Pc.

In the invention described in claim 7 , in the middle of claims 5 and 6 , a point Pj between the point Pd which is the starting point of the tab 5 on the boundary line 1c and the point Pc which is the tip of the tab 5 is the processing start point. In the tab cutting method according to claim 4, the third tab processing method (FIG. 10 (c)) is used.
The position where the machine center line CLx'passes through the cutout range of the tab 5 of the selvage 1b connects the point Pd which is the starting point of the tab 5 on the boundary line 1c and the point Pc which is the tip of the tab 5 in a plan view. It is characterized by being a point Pj on the line.

According to the present invention, the center point (processing point) P0 of the unwinding portion 3 of the original fabric 1 is provided so as to overlap the machine center P0'of the apparatus A in a plan view. Even if meandering occurs in the feed, the displacement amounts C1'and C2' of the machining point P0 due to this meandering are suppressed to the minimum. As a result, it is possible to divide the original fabric 1 into two equal parts by the laser beam L with high accuracy required even at a high transfer speed.
Further, in the tab forming original fabric 1', the tab cutting processing range of the laser beam L is limited to the center point (processing point) P0 and its vicinity, so that high-speed and high-precision tab processing can be similarly performed.

If the meandering detection device 15 and the meandering correction device 10u (12u) are provided, the meandering generated in the original feed can be suppressed in a short time, the meandering correction becomes possible, and the linearity is high. Not only can it be divided, but a clean winding state can be obtained.

It is a perspective view of the original fabric processing apparatus which concerns on this invention. (A) is a plan view of a main part of FIG. 1, and (b) is a plan view showing meandering of the original fabric and its displacement amount. (A) A perspective view of the original roll and (b) a perspective view of the original roll for tab formation. It is a partial perspective view of the installation part of the meandering detection device which concerns on this invention. It is an enlarged perspective view near the processing point of FIG. It is sectional drawing of the main part of the expander roll part of the apparatus of this invention. It is a top view of the apparatus of this invention in the case of a winding part having two axes. It is a perspective view when tab processing is performed by the apparatus of this invention. It is an enlarged perspective view of the tab processing part in FIG. (A) An enlarged perspective view showing the moving state of the laser beam for tab processing with a point on the boundary line as the processing start point, and (b) Enlarged view showing the moving state of the laser beam for tab processing with a point near the side side as the processing start point. It is a perspective view, (c) is an enlarged perspective view which shows the moving state of the laser beam of tab processing which sets the point between the point on the boundary line and the point near a side side as a processing start point. It is a main part plan view which shows an example of tab formation in FIG. 10A.

Hereinafter, the present invention will be described with reference to the illustrated examples. In the present invention, the raw fabric processing device A divides the full-width (full size) raw fabric 1 into two equal parts, and the raw fabric processing device A divides the raw fabric 1 into two equal parts, and a half-width (or separately prepared) tab. It is divided into the case where the tab 5 is formed on the selvage portion 1b of the forming original fabric 1'.
First, a case where the raw fabric processing device A that divides the full-width (full-size) raw fabric 1 into two equal parts and the case where the full-width (full-size) raw fabric 1 by the device A is divided into two equal parts will be described. After that, a case where the tab 5 is formed on the selvage portion 1b of the tab forming original fabric 1'by the device A will be described.

As shown in FIG. 1 (1st Example), the raw fabric processing apparatus A of the present invention is roughly divided into a raw fabric delivery unit 10, a feed roller 20a to 20n following the feed roller 20a to 20n, an expander roller 40.41 and two equal parts. Horizontal holding unit 11, winding unit 12, laser emitting device 30, reference position setting unit K, meandering detection device 15, and meandering correction device including take-up side rollers 50a to 50n that horizontally convey the divided original fabric 1'. It is composed of 10u (12u) and is incorporated in the device frame (not shown).

In the original fabric 1 applied to the apparatus A of FIG. 1, an active material-coated portion 1a to which an electrode paste is applied is formed on at least one of the front and back surfaces of the metal foil 4, and both sides 4a of the metal foil 4 are formed. The part along the ear portion 1b is the region where the electrode paste is not applied. Of course, the electrode paste may be applied to the entire surface of the metal foil 4, and in this case, the raw fabric divided into two equal parts is not used for tab formation.
The metal foil 4 is, for example, a copper foil or an aluminum foil. The electrode paste contains an active material, a binder, a solvent and the like. The active material includes a positive electrode active material and a negative electrode active material.
Examples of the positive electrode active material include composite oxides, metallic lithium, and sulfur.
The negative electrode active material is composed of, for example, various carbons, alkali metals such as lithium and sodium, metal compounds, metal oxides of SiOx, and boron-added carbon.
As the binder, a resin such as a fluororesin, a thermoplastic resin, or an imide resin is used.
The width of the metal foil 4 varies, and the width of the selvage portion 1b also varies.
The metal foil 4 is usually divided by a slitter, and both side surfaces 4a thereof have high-precision linearity. On the other hand, since the active material coated portion 1a is coated with the electrode paste, there is a slight variation in thickness.

The full-size raw fabric 1 is wound around the raw fabric delivery shaft 1g in multiple layers and is subjected to division processing as a raw fabric roll 1f. In this embodiment, both ends of the raw fabric delivery shaft 1g project from both ends of the wound full-size roll-shaped original fabric 1, and this portion is rotatably supported by the original fabric roll support stand 10s. The straight line passing through the center of rotation of the original fabric delivery shaft 1 g is the center line CLf. Then, on the center line CLf, the midpoints at both ends of the rolled roll-shaped original fabric 1 are set as the midpoint Cf of the original fabric roll 1f (FIG. 3A).
Of course, the original roll 1f is not limited to such a structure, and although it is not shown, a structure that can rotatably support the original roll support frame 10s is sufficient. The width of the original fabric 1 is 2G.

The raw fabric delivery unit 10 is provided on a pair of raw fabric roll support pedestals 10s that rotatably support both ends of the raw fabric delivery shaft 1g of the raw fabric roll 1f, and one of the raw fabric roll support pedestals 10s. It is composed of a delivery side servomotor 10m that rotates the delivery shaft 1g.

The pair of raw fabric roll support pedestals 10s are installed on the original fabric delivery side meandering correction device 10u, which will be described later, at regular intervals (2S), and rotatably support both ends of the original fabric delivery shaft 1g. Then, a delivery side servomotor 10m is installed on one of the original fabric roll support pedestals 10s, and the original fabric delivery shaft 1g suspended between the original fabric roll support pedestals 10s is rotated in the transmission direction of the original fabric 1. ing.
Here, the rotation support shaft of the raw fabric roll support frame 10s that supports the raw fabric delivery shaft 1g coincides with the center line CLf of the raw fabric delivery shaft 1g. In this embodiment, it is assumed that 1 g of the original fabric delivery shaft is supported by the original fabric roll support pedestal 10s by left and right distribution centered on the midpoint Cf, and the intermediate point between the left and right original fabric roll support pedestals 10s is the original fabric delivery shaft. It is assumed that it corresponds to the midpoint Cf of 1 g. That is, the distances from the left and right original roll support mounts 10s to the midpoint Cf are both equal to the distance S.

The original fabric delivery unit 10 is installed in the original meandering correction device 10u. The meandering correction device 10u on the original meandering side is installed between the meandering correction moving plate 10x on which the original meandering sending portion 10 is installed, the meandering correction fixing plate 10y installed on the floor surface, and the meandering correction moving plate 10x. It is composed of a rolling member 10z such as a roller that moves a minute amount in the above-mentioned direction. The meandering correction moving plate 10x is connected to a back-and-forth reciprocating drive device 10p capable of controlling the amount of movement using a hydraulic cylinder connected to the meandering correction fixing plate 10y as a drive source.

Next to the original fabric delivery unit 10, feed rollers 20a to 20n forming the first half of the horizontal holding unit 11 are installed. The feed rollers 20a to 20n convey the original fabric 1 sent out from the original fabric sending unit 10 while keeping it horizontal. A known original fabric side dancer roller 20d is incorporated in the middle of the feed rollers 20a to 20n as needed, and the tension of the original fabric 1 being fed is adjusted.

A pair of front and rear expander rollers 40 and 41 forming an intermediate portion of the horizontal holding portion 11 are installed on the downstream side of the rearmost feed roller 20n (FIGS. 5 and 6). The expander rollers 40 and 41 are formed in an outer shape similar to the "conga" of a musical instrument, the diameter of which is gradually increased from both ends toward the center. Expander rollers 40 and 41 are provided before and after the processing point P0 described later, and at the same time keep the unwinding portion 3 of the original fabric 1 horizontal, and at the same time, pass over the expander rollers 40 and 41 around the processing point P0 due to this shape. An outward tension is applied to the original fabric 1 in the axial direction of the expander rollers 40 and 41.
In this embodiment, the expander rollers 40 and 41 are provided before and after the processing point P0, but the present invention is not limited to this, and only one of them may be used.

Take-back side rollers 50a to 50n forming the latter half of the horizontal holding portion 11 are provided downstream of the expander rollers 40 and 41. The take-up side rollers 50a to 50n are divided into two equal parts while being kept horizontal, and a pair of side-by-side half-width original fabrics 1'are sent to the take-up portion 12.

A take-up portion 12 is installed following the take-up side rollers 50a to 50n. The take-up portion 12 has a one-axis type as shown in FIG. 1 and a two-axis type as shown in FIG. First, the uniaxial winding portion 12 will be described, and then the biaxial winding portion 12 will be described.
The uniaxial winding portion 12 has the same structure as the original fabric sending portion 10. The winding portion 12 is a pair of winding roll support pedestals 12s that rotatably support both ends of a winding shaft 2g that winds a pair of left and right original fabrics 1'arranged side by side with a laser-processed half-width G. It is provided on the take-up roll support stand 12s, and is composed of a take-up side servomotor 12 m that rotates the take-up shaft 2 g erected on the take-up roll support stand 12s.
In this embodiment, the take-up roll support stand 12s has the same width as the original roll support stand 10s and is installed in parallel. A pair of left and right original fabrics 1'are wound around the winding shaft 2g in a roll shape to form a winding roll 2r.
On the center line CLr of the winding shaft 2g, the midpoint (cut portion of both) between the outer ends of the pair of left and right original fabrics 1'wound in a roll shape is defined as the midpoint Cr. In other words, the midpoint Cr is the midpoint of the support points of the take-up roll 2r on the center line CLr by the take-up roll support pedestal 12s.
Of course, the take-up shaft 2 g is not limited to such a structure and is not shown, but it can be rotatably supported by the take-up roll support stand 12s, and a pair of left and right original fabrics 1 arranged side by side with a half width G. A structure that winds up'by side by side is sufficient.

Then, the straight line connecting the above midpoints Cf and Cr becomes the machine center line CLX'of the apparatus A, the intersection angle between the machine center line CLX'and the center line CLf of the original fabric delivery shaft 1 g, and the CLX'and the take-up shaft. The angle of intersection with the center line CLr of 2 g is a right angle.
In principle, the support point of the original fabric delivery shaft 1 g of the original fabric roll support pedestal 10s and the support point of the take-up shaft 2 g of the take-up roll support pedestal 12s are made to have the same width (2S).

The pair of winding roll support pedestals 12s are installed on the winding side meandering correction device 12u, which will be described later, at regular intervals (2S), and rotatably support both ends of the winding shaft 2g. A take-up side servomotor 12m is installed on one of the take-up roll support pedestals 12s, and the take-up shaft 2 g suspended between the take-up roll support pedestals 12s is rotated in the take-up direction.
Here, the rotary support shaft of the take-up roll support stand 12s coincides with the center line CLr of the suspended take-up shaft 2 g, and the intermediate point between the take-up roll support mount 12s is the midpoint Cr of the take-up shaft 2 g. Match.
This midpoint Cr also corresponds to the dividing line of the half-width original roll 1'wound in parallel with the take-up shaft 2 g.

The take-up unit 12 is installed in the take-up side meandering correction device 12u. The take-up side meander correction device 12u is installed between the meander correction moving plate 12x on which the take-up portion 12 is installed, the meander correction fixing plate 12y installed on the floor surface, and the meander correction moving plate 12x described above. It is composed of a roller-shaped winding side rolling member 12z that moves a minute amount in the direction. The meandering correction moving plate 12x is connected to a take-up side reciprocating drive device 12p capable of controlling the amount of movement using a hydraulic cylinder as a drive source.

As shown in FIG. 2A, the reference position setting unit K sets the midpoint Cf, which is the midpoint between the original roll support pedestals 10s, and the midpoint Cr, which is the midpoint between the take-up roll support pedestals 12s. The center line CLx of the original fabric 1 is matched with the machine center line CLx'to be connected.
In this embodiment, the reference position setting unit K is installed at two locations, the original fabric sending unit 10 side and the winding unit 12 side. The reference position setting unit K on the original fabric delivery unit 10 side is referred to as the original fabric side reference position setting unit Kf, and the reference position setting unit K on the winding unit 12 side is referred to as the winding side reference position setting unit Kr. Both have the same structure.
The original fabric side reference position setting unit Kf is configured to move parallel to the original fabric delivery shaft 1g on the original fabric delivery unit 10 side. Then, when the original fabric roll 1f is set on the original fabric roll support stand 10s and the end surface of the original fabric roll 1f is abutted against the original fabric side reference position setting portion Kf, the original fabric side reference position setting unit Kf described above. As described above, the midpoint Cf of the original roll 1f is automatically set at a position that automatically matches the machine center line CLx'. Therefore, when the original roll 1f is set on the original roll support stand 10s and the end surface of the original roll 1f is abutted against the original fabric side reference position setting portion Kf, the midpoint Cf of the original roll 1f is the machine center line CLx. 'Automatically matches.

On the take-up side, at this point, the pulled-out end of the original fabric 1 is only attached to the take-up shaft 2g, so the side 4a of the end of the original fabric 1 thrusts into the take-up side reference position setting portion Kr. It is mounted on the take-up shaft 2g in a state of being hit and positioned.
As a result, the center line CLx of the original fabric 1 and the machine center line CLx'are coincident in a plan view.
The structure of the reference position setting unit K is not limited to the above, as long as the above functions are achieved.

The laser emitting device 30 is installed directly above the processing point P0, which will be described later, and emits the laser beam L toward the processing point P0. Since only division is performed here, a fixed laser beam L is sufficient. However, as a galvano-type laser emitting device, it may be reciprocated over a short distance on the center line CLx of the original fabric 1 around the processing point P0.

In the embodiment shown in the figure, the meandering detection device 15 is also installed at two locations, the original fabric sending unit 10 side and the winding unit 12 side, like the reference position setting unit K. The original fabric sending unit 10 side is referred to as the original fabric sending side meandering detection device 15f, and the winding unit 12 side is referred to as a winding side meandering detecting device 15f. Both have the same structure.
The meandering detection device 15 is a known line sensor, in which CCD elements are arranged in a horizontal row, and at least one of the side 4a and the boundary line 1c of the original fabric 1.1'is captured and illustrated. No Image data is sent to the control unit, and whether the side side 4a or the boundary line 1c of the original fabric 1 deviates from the preset reference point (in other words, from the machine center line CLx'to the center line CLx of the original fabric 1). Is out of alignment) is being detected.
The original meandering detection device 15f is the edge of the horizontal holding unit 11 immediately after unwinding from the original material sending unit 10, and the winding side meandering detecting device 15f is the horizontal holding unit 11 immediately before winding the winding unit 12. It is installed on each edge of.
In this embodiment, the case where the original fabric is installed at two locations, the original fabric sending portion 10 side and the winding portion 12 side, is shown, but of course, the present invention is not limited to this, and only one of them may be used.

Next, the machining point P0, which is the center of the machine, will be described. In this embodiment, the raw fabric 1 is unwound from the raw fabric roll 1f, laser-cut into two equal parts at the processing point P0, which is the center point of the unwinding portion 3, and wound up. As already described, the raw fabric 1 has an active material layer coated on at least one surface thereof, and the active material layer has a slight error in thickness. Therefore, a slight meandering as shown in FIG. 2B is observed during unwinding. In FIG. 2B, when the original fabric 1 is sent straight, it is indicated by a solid line, and when the original fabric 1 is tilted with respect to this solid line, it is indicated by a two-dot chain line. The meandering in the figure is exaggerated for ease of understanding.

As can be seen from FIGS. 1 and 2 (a) and 2 (b), the machine center point P0'where the processing point (irradiation point) P0 of the original fabric 1 is set immediately above it is the original fabric roll support stand 10s in a plan view. The machine center line CLx'connecting the midpoint Cf, which is the midpoint between them, and the midpoint Cr, which is the midpoint between the take-up roll support mounts 12s, is the midpoint between the midpoints Cf and Cr.

As described above, when the original fabric center line CLx of the original fabric 1 is set by the reference position setting unit K so as to overlap the machine center line CLx'in a plan view, it stands at the machine center point P0'which is the intermediate point. The vertical line, that is, the machine center axis H, coincides with the center point P0 of the unwinding portion 3 of the original fabric 1 at the intersection of the unwinding portion 3 of the original fabric 1. This center point P0 is a processing point and also an irradiation point of the laser beam L.
The center point P0 is located at a position where the distance D from the center line CLf of the original fabric sending shaft 1g and the center line CLr of the winding shaft 2g is equal. Further, the distances S from the midpoints Cf and Cr to the original roll support pedestal 10s and the take-up roll support pedestal 12s are also the same.
In other words, the diagonal line connecting the original roll 1f that intersects the center lines CLf and CLr in plan view and the intersection of the side sides 4a of the take-up roll 2r (indicated by a broken line in FIG. 2B). Will pass through the processing point (irradiation point) P0.

Next, the effect of meandering at the processing point (irradiation point) P0 will be described.
Since the meandering of the original fabric 1 is mainly caused by the uneven thickness on the left and right of the active material coating layer, it meanders with respect to the original fabric 1 (shown by the solid line) when it is not meandering as shown in FIG. 2 (b). The original fabric 1 (indicated by the alternate long and short dash line) is inclined to the left and right.
Therefore, the center lines CLx1 and CLx2 when meandering to the left and right with respect to the center line CLx of the non-meandering original fabric 1 are slightly inclined to the left and right. When the meandering amount on the winding side at this time is indicated by C1 and C2, the center lines CLx1 and CLx2 in the case of meandering pass near the processing point P0, so that the meandering amount on the winding side is extremely large with respect to the meandering amount C1 and C2. A small displacement amount C1'and C2' is shown.

The division of the original fabric 1 into two equal parts in the apparatus A will be described. As described above, the end face of the roll-shaped original fabric 1 is brought into contact with the original fabric side reference position setting portion Kf, and the midpoint Pf of the original fabric roll 1f is set so as to coincide with the midpoint Cf of the original fabric roll support frame 10s. .. The midpoint Cf exists on the machine center line CLx'.
Next, the original fabric 1 is unwound from the original fabric roll 1f, the side 4a thereof is brought into contact with the winding side reference position setting portion Kr through the horizontal holding portion 11, and the winding shaft 2g erected on the winding portion 12 is installed. Set to. As a result, the center line CLx of the original fabric 1 overlaps the machine center line CLx'of the apparatus A in a plan view.
That is, the center line CLx comes on the machine center point P0'. Since the vertical line set at the machine center point P0', the intersection of the machine center axis H and the unwinding portion 3 of the original fabric 1 becomes the machining point P0 (this point P0 is also the center point of the unwinding portion 3). The sending side servomotor 10m and the winding side servomotor 12m are rotated in synchronization with each other, and at the same time, the laser beam L is emitted from the laser emitting device 30 to the processing point P0.

Before and after the processing point P0, the expander rollers 40 and 41 apply outward tension to the unwinding portion 3, so that the melting point due to the irradiation of the laser beam L is immediately torn, separated without rewelding, and the processing point. It is continuously divided into two equal parts at P0 and wound around a take-up shaft of 2 g.
During that time, the meandering detection device 15 continuously detects the edges of the traveling original fabric 1.1'.

If there is even a slight thickness on the left and right of the active material layer of the raw fabric 1, the raw fabric 1 tends toward the thinner side and meandering occurs. Since the displacement amounts C1'and C2'at the machining point P0 are very small with respect to the meandering amounts C1 and C2, when the meandering amounts C1 and C2 are small, the displacement amounts C1'and C2'can be ignored. Although no correction is made for meandering, when a large meandering occurs, the meandering detection device 15 detects the meandering amounts C1 and C2, and when this exceeds the threshold value, the meandering correction device 10u (12u) is operated via a control unit (not shown). Operate to eliminate meandering. The meandering correction moving plate 10x (12x) of the meandering correction device 10u (12u) moves minutely in the direction perpendicular to the machine central axis H.
The minute movement amount of the meandering correction moving plate 10x on the original fabric side is shown by Mf1 and Mf2, and the minute movement amount of the meandering correction moving plate 12x on the winding side is shown by Mr1 and Mr2.
That is, when the center line CLx of the original fabric 1 is inclined as shown by CLx1 and CLx2, the meandering amounts C1 and C2 are detected by the meandering detection device 15 (or detected by either one), and this meandering amount is detected. Both or one of the meandering correction moving plates 10x (12x) is moved in parallel as described above so as to cancel out C1 and C2, and the machining point P0 is corrected so as to be located directly above the machine center point P0'. The movement of the meandering correction moving plate 10x (12x) is driven by the reciprocating driving device 10p (12p).

Further, the meandering is not only inclined as shown by the meandering center lines CLx1 and CLx2 with respect to the center line CLx of the original fabric 1 as described above, but may move in the same direction, but it is different from that of the original fabric sending side. The meandering detection devices 15f and 15r provided on the winding side detect the respective meandering amounts, and the meandering correction device 10u (12u) is operated so as to offset the meandering amount to eliminate the meandering in the same manner as described above. In the figure, the meandering amounts C1 and C2 are shown on the original fabric side, but of course, the meandering amount is not limited to this, and may be measured on the winding side.

Since the original fabric 1 is continuously fed at high speed as described above, it is cut linearly at the irradiation point P0 in accordance with the movement of the original fabric 1. Due to the action of the pair of left and right expander rollers 40 and 41 described above, the adjacent left and right split original fabrics 1'are slightly separated to the left and right at the same time as melting at the irradiation point P0, and the irradiation point is slightly separated at the next moment when the irradiation point P0 moves. Even if the molten material remaining at P0 solidifies, it can no longer be reconnected, remains on the cut end face and solidifies as it is, and both raw materials 1'are surely and accurately separated into half widths. Further, at this time, the cut end is due to fusing, and as described above, the molten substance is solidified roundly at the cut end due to its surface tension, so that burrs such as cutting by a cutting tool do not occur.
When the molten substance is blown off with the assist gas as in the conventional case, it is pulled by the blown-out molten substance, and the molten substance remaining on the cut end face remains as sharp spines like a sword on the cut end face. Such a phenomenon does not occur. In addition, since the molten substance remains rounded at the cut end as it is, cutting dust is not generated as in the case of using an assist gas.

Since the original fabric 1 is continuously sent at high speed, the original fabric 1 is continuously divided into two as long as the laser beam L is emitted. The divided raw fabric 1'is wound around the take-up shaft 2 g as described above. At this time, although not shown, dancer rollers may be provided on the take-up side rollers 50a to 50n to adjust the tension.

Next, a case where the take-up shaft 2g is made into two shafts will be described. Since the parts other than the winding portion 12 are the same as in the case of one axis, only the different parts will be described. FIG. 7 shows a case where the take-up shaft 2g is set to two front and rear shafts, which are the rear take-up shaft 2g1 and the front take-up shaft 2g2, respectively. Each of the rear winding shaft 2g1 and the front winding shaft 2g2 is provided with a winding roll support stand (not shown), and these are mounted on the rear and front winding side meandering correction devices 12u1 and 12u2. The take-up side meander detection device 15r is also preferably attached to the rear part and the front part, and the rear part is the rear take-up side meander detection device 15r1 and the front part is the front take-up side meander detection device 15r2.

In this case, as the reference point Cr of the machine center line CLx'in the apparatus A, any take-up shaft 2g1 and 2g2 may be adopted as described above, but in the embodiment of FIG. 7, the rear part A take-up shaft 2g1 is adopted.
One method of meandering detection is the method described above by the rear winding side meandering detection device 15r1 and the front winding side meandering detecting device 15r2, respectively, and the rear and front winding side meandering correcting devices 12u1 and 12u2. It will be corrected in the same way.
Alternatively, without the front winding side meandering detection device 15r2, based on the rear winding side meandering detection device 15r1, the correction amount on the front winding shaft 2g2 side is calculated by calculation, and the meandering correction is performed. May be good. Of course, if the original meandering detection device 15f is provided, the detected value is also added to the meandering correction.
The same thing can be done based on the front winding shaft 2g2.

Next, a case where tab processing is performed on the selvage portion 1b of the half-width original fabric 1'using the present device A will be described (second embodiment). The original fabric 1'used here is an active material coated portion 1a in which an active material is coated on at least one surface of a long metal foil 4, and at least one side surface 4a of the metal foil 4 and an active material coated. It has an ear portion 1b formed between the portion 1a and the portion 1a and which is not coated with the active material. Since the selvage 1b is tabbed, the selvage 1b must be set so that one point in the tabbing range is aligned with the machine center point P0'in a plan view. The width of about half the width of the horizontal holding portion 11 or less is applied.
In the second embodiment, the half-width original fabric 1'cut by the laser in the first embodiment is applied, but of course, the present invention is not limited to this.

The tab-forming raw fabric 1'applied to the second embodiment is a half-width one obtained by dividing the full-width raw fabric 1 into two as described above, and the selvage portion 1b is formed along one side side 4a. .. Then, the tab forming raw fabric 1'is half the width of the original fabric 1, and the selvage portion 1b is tabbed as described above, so that the half-width original fabric 1'of the first embodiment is wound side by side. From the taking roll 2r, although not shown, a separately prepared raw fabric delivery shaft 1 g rewound is used. As shown in FIG. 3B, the rewound tab-forming raw fabric roll 1f'is wound around the original fabric delivery shaft 1g and is at any point within the tab processing range of the selvage portion 1b (described later). ) Is rewound so as to coincide with the midpoint Cf of the center line CLf of the original fabric delivery shaft 1 g.
Also in this case, on the winding side, there are cases where the cut-out raw fabric 1'' with tabs and the waste material 1h from which the tab 5 is cut out are wound up on one axis, and cases where the cut-out raw fabric 1'' with tabs and the waste material 1h are wound up. There is a case of two axes that wind up separately. In this case, since it is not necessary to accurately wind the waste material 1h, the meandering correction is not necessary, and the above meandering correction is performed on the tabbed cutout original fabric 1'' side.

The shape of the tab 5 does not have to be a separately determined shape, but here, a case where a rectangular or square tab 5 is formed by cutting out from a running ear portion 1b will be described as a typical example. 10 (a) to 10 (c), FIGS. 11).
In this representative example, first, as described above, the tab 5 is used so that the machine center line CLx'passes the cutout range of the tab 5 of the selvage 1b in a plan view using the reference position setting unit Kf on the original fabric side. The forming raw fabric roll 1f'is attached to the original fabric sending portion 10. There are three mounting methods as follows.
The first is the case where the machine center line CLx'corresponds to the boundary line 1c between the active material coated portion 1a and the selvage portion 1b in a plan view, and the second is the selvage portion 1b away from the boundary line 1c. The point Pc, which is the tip of the tab 5, is set as the machining start point, and the third is between the point Pd, which is the starting point of the tab 5 on the boundary line 1c, and the point Pc, which is the tip of the tab 5. This is the case where the point Pj of is set as the machining start point. In this way, after the tab-forming raw fabric roll 1f'is installed in the original fabric sending portion 10, the tab-forming original fabric 1'is subsequently unwound, and the unwinding is performed using the take-up side reference position setting unit Kr. The end of the portion 3'is attached to the winding shaft 2g of the winding portion 12. After that, the original fabric sending unit 10 and the winding unit 12 are rotated synchronously to move the tab-forming original fabric 1'from the original fabric sending unit 10 toward the winding unit 12, and the selvage portion 1b is moved by the laser beam L. Cut out tabs at

In this embodiment, since the fusing line Y due to the laser beam L must be provided perpendicular to the boundary line 1c as shown in FIG. 11, it is synchronized with the moving speed of the selvage 1b and is in the same direction as the traveling direction of the selvage 1b. While moving, it reciprocates between the point Pa of the boundary line 1c and the point near the side 4a of the selvage 1b, and waits at the point of the boundary line 1c and the point near the side 4a of the selvage 1b. Become. Since these tab processing methods have the same processing start point directly above the machine center point P0'of the apparatus A in a plan view, the influence of meandering is minimal, but the meandering increases as the distance from the point Pa increases. The impact will be slightly greater. However, since the tab 5 itself is not large, it is finished with an accuracy that does not hinder practical use.

There are three methods for forming the cutout of the tab 5 from the mounting direction described above, as shown in FIGS. 10A to 10C. Hereinafter, the tab processing of the first method will be described.

In the first method of tab processing, a half-width raw fabric roll 1f'is set in the raw fabric sending portion 10 by the original fabric side reference position setting unit Kf as in the first embodiment. The boundary line 1c of the set half-width original roll 1f'overlaps the machine center line CLx' in a plan view.
Further, the take-up shaft 2 g is also set in the take-up portion 12, and the end portion of the unwinding portion 3'unwinded from the half-width original fabric 1'is set in the take-up shaft 2 g. Similar to the first embodiment, the winding shaft 2g side is also set so that the boundary line 1c of the unwinding portion 3'overlaps the machine center line CLx' in a plan view using the winding side reference position setting unit Kr. As a result, the machine center axis H, which is a vertical line set at the machine center point P0', intersects the boundary line 1c. The intersecting point is the processing point P0.
After setting in this way, as in the first embodiment, the half-width original fabric 1'is moved and the laser beam L is emitted toward the processing point P0, which is the cutting start point.

In the first half of the movement, the half-width original fabric 1'is tabbed while receiving a constant tension by the action of the original fabric side dancer roller 20d, is sent out at a constant speed, and is wound around a winding shaft 2g. During this time, upward surface pressure is applied to the active material-coated portion 1a and the selvage portion 1b by the expander rollers 40 and 41, and tension is generated in both directions in the outward direction. Then, in this state, the tab 5 is cut out by the laser beam L.

In FIG. 10A, the cutting start point is the point Pa. In order to facilitate understanding of the movement order of the laser beam L in the selvage portion 1b, Arabic numerals are added as in the movement order of the laser beam L (1) to (4). This movement is repeated and the tab 5 is cut out.

Due to such an operation, the laser emitting device 30 is a galvanos scanning type as described above. The moving width of the laser beam L is from the point Pa (Pc) on the boundary line 1c to the point Pb (Pd) near the side 4a of the ear 1b with respect to the selvage 1b, and it takes a predetermined time to reach the points Pb and Pe. , Wait at that position.
Due to this rectangular movement of the laser beam L, the uncut portion of the selvage portion 1b becomes the waste material 1h. The combination of the movement of the selvage portion 1b and the diagonal movement and stop of the laser beam L forms a fusing line Y in the direction perpendicular to the active material-coated portion 1a, and is drawn so that a rectangular cutout is performed ( FIG. 11).

When the cutting by the laser beam L starts from the movement start point Pa on the boundary line 1c, as shown in FIG. 10 (a), the movement speed of the half-width original fabric 1'in the side 4a direction of the half-width original fabric 1'is increased. At the same time, the laser beam L moves diagonally (this moving line N is shown by (1)).
When the point Pb at the tip of the tab 5 is reached, the laser beam L stops at the point Pb for a predetermined time. The stop time is the width W of the tab 5 (this movement line N is indicated by (2)). The position after the stop is the point Pc.
When the point Pc is reached, the laser beam L moves diagonally in the direction of the boundary line 1c according to the moving speed of the original fabric 1 and reaches the point Pd (this moving line is shown by (3)).
When the point Pc is reached, the laser beam L stops at the point Pc and stops at that point until the next tab formation position. As a result, the selvage portion 1b is cut along the boundary line 1c.

By the above cutting operation, the rectangular or square tab 5 as shown in FIG. 11 is cut out to the selvage portion 1b. Since the laser emitting device 30 is a galvano mirror type, the emitting direction of the laser beam L can be freely controlled, whereby the tab 5 is not limited to a rectangle or a square, and the tab 5 is not limited to a rectangle or a square, but has a circular shape or other shape on the side edge of the active material coating portion 1a. You can cut it out freely.
By repeating such an operation, tabs 5 are formed on the selvage portion 1b at predetermined intervals, and the remaining portion becomes waste material 1h.

The outward tension applied to the selvage portion 1b at the time of cutting out by the laser beam L has a function of expanding the molten portion at the laser cutting position, preventing refusion of the molten portion, and ensuring cutting. ..

In the above tab formation, the laser beam L must be reciprocated by the height T of the tab 5 as shown in FIG. 9 in accordance with the movement of the ear portion 1b, but the laser beam L is separated from the processing point P0 by the reciprocating operation. However, since the height T of the tab 5 is smaller than the width of the active material coated portion 1a, the displacement amounts C1'and C2' that pose a practical problem are generated. do not do.

In the tab processing of the second method, the half-width original fabric roll 1f'is set in the original fabric sending unit 10 by the original fabric side reference position setting unit Kf in the same manner as described above. The point Pc of the set half-width original roll 1f'overlaps the machine center line CLx' in a plan view. Then, it is set on the unwinding portion 3'unwound from the half-width original fabric 1', and the end portion of the unwinding portion 3'unwound from the half-width original fabric 1'is set on the winding shaft 2g. Similar to the first embodiment, the winding shaft 2g side is also set so that the point Pc of the selvage portion 1b overlaps the machine center line CLx'in a plan view using the winding side reference position setting portion Kr. As a result, the machine center axis H, which is a vertical line set at the machine center point P0', intersects the boundary line 1c. The intersecting point is the processing point P0.
After setting in this way, as in the first method, the half-width original fabric 1'is moved and the laser beam L is emitted toward the processing point P0, which is the cutting start point.

In FIG. 10B, the cutting start point is the point Pc. Similarly, Arabic numerals are added in the order of movement of the laser beam L, such as (1) to (5). This movement is repeated and the tab 5 is cut out. When the cutting start point is the point Pc, the laser beam L is obliquely run to the point Pd. After that, it is cut out by the same procedure as above.

In the tab processing of the third method, the half-width original fabric roll 1f'is set in the original fabric sending unit 10 by the original fabric side reference position setting unit Kf in the same manner as described above. The point Pj on the straight line connecting the points a and b of the set half-width original roll 1f'overlaps the machine center line CLx' in a plan view. If the point Pj is the midpoint between the points a and b, the left and right swing widths of the laser beam L are equal, so that the processing accuracy is the highest among the three methods.
In this case as well, as described above, the point Pj of the selvage portion 1b is set so as to overlap the machine center line CLx'in a plan view using the reference position setting portions Kf and Kr on the original fabric sending side and the winding side. As a result, the point Pj coincides with the machining point P0 where the machine center axis H, which is a vertical line set at the machine center point P0', intersects the boundary line 1c.
After setting in this way, as in the first method, the half-width original fabric 1'is moved and the laser beam L is emitted toward the processing point P0, which is the cutting start point.

In FIG. 10 (c), the cutting start point is the point Pj. Then, as in the above example, Arabic numerals are added so as to say (1) to (5) in the order of movement of the laser beam L. This movement is repeated to cut out the rectangular or square tab 5.

If meandering occurs in the above three methods, the meandering correction is performed by the same method as in the first embodiment. Further, in the above three methods, the winding shaft 2g is one shaft, and the waste material 1h is also wound around the winding shaft 2g together with the original fabric 1'with the tab 5 formed, but this is used as two shafts and wound separately. You may try to take it.

A: Original fabric processing device, C1 / C2: Serpentine amount, C1'/ C2': Displacement amount of processing point due to serpentine, CLx1 / CLx2: Serpentine center line, CLx: Original fabric center line, CLx': Midpoint Cf・ Straight line connecting Cr (machine center line), CLf ・ CLr: center line, CLf'・ CLr': parallel line parallel to center line CLf ・ CLr, CLy: straight line in the width direction of the original fabric passing through the processing point, Cf -Cr: Midpoint, D: Distance from the straight line in the width of the original fabric passing through the processing point (irradiation point) to the center line of the original fabric roll axis and the take-up roll axis, G: Width of the original fabric divided into two equal parts. (Distance from the center line CLx of the original fabric to the long side of the original fabric), H: Machine center axis (vertical line), K: Reference position setting unit, Kf: Reference position setting unit on the original fabric side, Kr: Winding side Reference position setting unit, L: laser beam, Mf1 / Mf2: minute movement amount of the original reverse meandering correction plate, Mr1 / Mr2: minute movement amount of winding side meandering correction plate, N: movement line of laser beam, P0: unwinding Center point of part (machining point, irradiation point), P0': machine center point, Pa: starting point (moving start point, cutting start point), Pb / Pc: tab tip point (cutting start point), Pd: Point on the boundary line, Pf · Pr: intersection, Pj: Point on the straight line connecting the point Pc and the point Pd, S: Support point of the original fabric delivery shaft from the middle point Cf, or ... From the middle point Cr to the take-up shaft Distance to support point, T: Tab height, Y: Fused wire, 1: Original fabric, 1': Half-width original fabric (original fabric for tab formation), 1'': Tab cutout original fabric, 1a: Active Material coated part, 1b: Ear part, 1c: Boundary line, 1f: Raw fabric roll, 1f': Original fabric roll for tab formation, 1g: Raw fabric delivery shaft, 1h: Waste material, 2g: Winding shaft, 2g1: (Rear) Winding shaft, 2g2: (Front) Winding shaft, 2r: Winding roll, 2r1, 2r2: Two winding rolls arranged in front and behind, 3: Unwinding part, 3': (Half-width ) Unwinding part, 3f: upstream end, 3r: downstream end, 4: metal foil, 4a: side side, 5: tab, 10: original fabric delivery part, 10m: transmission side servomotor, 10p: (original fabric side) Reciprocating drive device, 10s: Original fabric roll support stand, 10u: (Original fabric delivery side) Serpentine correction device, 10x: Serpentine correction moving plate, 10y: Serpentine correction fixing plate, 10z: Original fabric side reciprocating rolling member, 11: Horizontal holding part, 12: Winding part, 12m: Winding side servomotor, 12p: Winding side reciprocating moving device, 12s: Winding roll support stand, 12u ・ 12u1 ・ 12u2: (winding side) meandering correction device, 12x: Serpentine correction moving plate, 12y: Serpentine correction fixing plate, 12z: Winding side rolling member, 15: Serpentine inspection Output device, 15f: Original reverse side meander detection device, 15r: Winding side meander detection device, 15r1: Rear winding side meander detection device, 15r2: Front winding side meander detection device, 20a to 20n: Feed roller, 20d : Dancer roller, 30: Laser emitting device, 40.41: Expander roller, 50a to 50n: Pick-up side roller.

Claims (7)

The raw fabric roll 1f of the raw fabric 1 for producing the electrode sheet used for the power storage device, in which the active material layer is coated on at least one surface of the long metal foil 4, is unwound on the upstream side and is wound on the downstream side. A pair of left and right half-width raw fabrics 1'that are cut into two equal parts and transported side by side are wound up on the downstream side by laser cutting the center of the unwinding portion 3 of the raw fabric 1 that is moving toward it. It is an anti-processing method
The center line in the longitudinal direction of the unwinding portion 3 of the original fabric 1 is defined as the original fabric center line CLx.
A parallel line parallel to the center line CLf passing through the rotation center of the original roll 1f and located on the upstream end 3f of the unwinding portion 3 of the original fabric 1 is defined as a parallel line CLf'.
When the parallel line parallel to the center line CLr passing through the rotation center of the take-up roll 2r and located on the downstream end 3r of the unwinding portion 3 of the original fabric 1 is defined as the parallel line CLr'.
The midpoint between the intersection Pf of the original fabric center line CLx and the parallel line CLf'and the intersection Pr of the original fabric center line CLx and the parallel line CLr'is set as the center point P0 of the unwinding portion 3.
A method for processing a raw fabric, which comprises measuring the amount of meandering of the original fabric 1 during transportation, correcting the meandering according to the measured value, and irradiating the center point P0 with a laser beam L.
The raw fabric roll 1f of the raw fabric 1 for producing the electrode sheet used for the power storage device, in which the active material layer is coated on at least one surface of the long metal foil 4, is unwound on the upstream side, and the raw fabric 1 is wound. A raw fabric processing device A that irradiates the ejection portion 3 with a laser beam L and winds up a pair of left and right half-width raw fabrics 1'divided into two equal parts on the downstream side.
A pair of left and right original fabric roll support pedestals 10s that rotatably support both ends of the original fabric delivery shaft 1g around which the original fabric 1 is wound are provided, and an original fabric delivery unit 10 that unwinds and sends out the original fabric 1
A pair of left and right take-up roll supports that are installed parallel to the original fabric delivery shaft 1 g and rotatably support both ends of the take-up shaft 2 g for winding the half-width original fabric 1'divided into two equal parts. A winding unit 12 having a gantry 12s and winding the pair of left and right half-width original fabrics 1'divided,
A horizontal holding portion 11 provided between the raw fabric sending portion 10 and the winding portion 12 and horizontally holding the unwinding portion 3 unwound from the raw fabric sending portion 10.
On the center line CLf of the original fabric delivery shaft 1 g suspended between the original fabric roll support pedestals 10s, the midpoint between the original fabric roll support pedestals 10s is set as the midpoint Cf.
When the midpoint between the take-up roll support mounts 12s is the midpoint Cr on the center line CLr of the take-up shaft 2 g suspended between the take-up roll support mounts 12s.
With respect to the machine center line CLx'connecting the midpoint Cf and the midpoint Cr, the reference position setting unit K for matching the original fabric center line CLx in the longitudinal direction of the original fabric 1 in a plan view,
The vertical line set at the machine center point P0', which is the midpoint between the midpoints Cf and Cr, is defined as the machine center axis H.
Assuming that the intersection of the machine central axis H and the unwinding portion 3 of the original fabric 1 is the processing point P0, the laser emitting device 30 that emits the laser beam L to the processing point P0
A meandering detection device 15 for detecting the meandering of the original fabric 1 and
It is composed of a meandering correction device 10u (12u) provided in at least one of the original fabric sending unit 10 and the winding unit 12.
At least one of the meandering correction devices 10u (12u) is parallel to the center line CLf of the original fabric delivery unit 10 or the center line CLr of the winding unit 12 according to the detection output from the meandering detection device 15. A raw fabric processing device characterized by being moved.
In the original fabric processing apparatus A according to claim 2,
The meandering detection device 15 is characterized in that it is installed in at least one of the horizontal holding portion 11 immediately after unwinding from the raw fabric sending unit 10 and the horizontal holding portion 11 immediately before winding the winding unit 12. Raw fabric processing equipment.
A method of tab-cutting with a laser beam L on the selvage portion 1b in which the active material of the tab-forming raw fabric 1'is not coated by using the raw fabric processing apparatus A according to claim 2.
The tab-forming raw fabric 1'has an active material coated portion 1a in which an active material is coated on at least one surface of a long metal foil 4, and at least one side surface 4a of the metal foil 4 and an active material coated portion 1a. Has an ear portion 1b formed between and without coating of active material,
In a plan view, the tab forming raw fabric roll 1f'is attached to the raw fabric sending portion 10 so that the machine center line CLx'passes through the cutout range of the tab 5 of the selvage portion 1b, and then the tab forming raw fabric 1f'. 'Unwind, and attach the end of the unwinding portion 3'to the winding shaft 2g of the winding portion 12.
After that, the original fabric sending unit 10 and the winding unit 12 are rotated synchronously to move the tab-forming original fabric 1'from the original fabric sending unit 10 toward the winding unit 12.
In a plan view, the laser beam L is moved with the processing point P0 on the selvage 1b corresponding to the machine center point P0'on the machine centerline CLx'as the processing start point, the selvage 1b is cut out, and the tab 5 is attached to the selvage 1b. A tab cutting method characterized by forming.
In the tab cutting processing method according to claim 4,
The position where the machine center line CLx'passes through the cutout range of the tab 5 of the selvage portion 1b is the boundary line 1c between the active material coated portion 1a and the selvage portion 1b in a plan view. Method.
In the tab cutting processing method according to claim 4,
The position where the machine center line CLx'passes through the cutout range of the tab 5 of the selvage portion 1b is a point in a plan view from the boundary line 1c toward the side side 4a and before the side side 4a, which is the tip of the tab 5. A tab cutting method characterized by being Pc.
In the tab cutting processing method according to claim 4,
The position where the machine center line CLx'passes through the cutout range of the tab 5 of the selvage 1b connects the point Pd which is the starting point of the tab 5 on the boundary line 1c and the point Pc which is the tip of the tab 5 in a plan view. A tab cutting method characterized by being a point Pj on a line.

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