JPH09175728A - Winding method and winding device of sheet-like carrying material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contribute to improvement of productivity by shortening cycle time, and obtain a highly accurate winding material by eliminating generation of the sag in a sheet-like carrying material when the sheet-like carrying material is cut so that a tail end part length becomes different. SOLUTION: A winding method and a winding device of a sheet-like carrying material are provided with a winding shaft 9 to rotate by gripping-bundling the tip edges of plural sheets 1 to 6 carried from the mutually different direction as one, first to sixth cutting mechanisms 11 to 16 which are arranged in respective positions corresponding to designated length of the respective sheets and are simultaneously actuated in a condition where winding operation of the winding shaft is stopped and cut the corresponding sheets and a sucking pipe 20 which is arranged between the cutting mechanism 16 of the sheet 6 whose length dimension is set long among the respective sheets and regulates the sag up to the winding shaft 9 by holding a midway part of this sheet 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing apparatus for molding, for example, a lithium ion secondary battery or an electrolytic capacitor element, which winds a sheet-shaped conveyed product around a winding shaft as a pre-process. The present invention relates to a winding method and a winding device.

[0002]

2. Description of the Related Art For example, in forming a lithium ion secondary battery, as shown in FIG.
The sheets d to d and the separator sheets e and f are overlapped and wound, the wound product is housed in a container, the lid is capped, and the container is completely sealed.

The above electrode sheet includes negative electrode sheets a and b,
The positive electrode sheets c and d are made of copper foil, and the positive electrode sheets c and d are made of aluminum foil. The separator sheets e and f interposed between these are electrical insulating sheets.

A tab t is attached to one of the positive electrode sheets d, and the front and rear edges of the positive electrode sheet d serve as reference lines Sa and Sb for the other sheets. Although the two separator sheets e and f have the same overall length, one side end thereof projects by a predetermined dimension B or E with respect to one reference line Sa, and the other side end thereof has a predetermined dimension with respect to the other reference line Sb. Projected by size M.

The other positive electrode sheet c has a reference line S at one end.
The dimension C is set so as to be largely retracted from a, and the other side end coincides with the reference line Sb. The two negative electrode sheets a and b are set to a dimension A in which one end of each of the negative electrode sheets a and b largely recedes from the reference line Sa, and the other end has a dimension K in which one of the negative electrode sheets a greatly protrudes from the reference line Sb. On the other hand, the other negative electrode sheet b is set to have a slightly protruding dimension L.

In this way, the positions of the sheets a to f are strictly set with respect to the reference lines Sa and Sb, and the sheets are wound around the winding shaft M located at the distance F from the reference line Sa. It acts as a regular scroll.

Then, the lithium secondary battery is molded, for example, by inserting it into the container in a wound state, injecting the electrolytic solution into the container, and then covering with a lid. The tab t is brought into electrical contact with the lid to obtain a chemical action as a battery.

As described above, the lengths of the sheets a to f are different, the position of the leading end which is the winding start end is different, and the position of the terminal end which is the winding end is also different.

Therefore, these sheets are conveyed along their respective conveying paths, and the conveying front end portions are all bundled and wound around a winding shaft. When the winding shaft has been rotated a predetermined amount, the rotation of the winding shaft is stopped once, and the cutting mechanisms arranged at different positions on the way are operated to cut the sheet. Then, the winding shaft is driven to rotate again, and the cut rear end portion of these sheets is taken up as the final end to obtain the wound product for the first time.

[0010]

The problem lies in the winding of the winding shaft after cutting all the sheets at once. That is,
Since a sheet with a long terminal length is cut at the same time as a sheet with a short terminal length, if these sheets are wound all at once, the distance between the terminal and the winding shaft of the sheet with a long terminal length is particularly long. Slack easily occurs, and as a result, winding slippage occurs.

In the finished product as a wound product, its diameter becomes larger than the set size, or it partially protrudes, so that it becomes out of the standard. Therefore, by moving the position of the cutting mechanism for cutting a sheet with a long terminal length to almost the same position as the position of a cutting mechanism for cutting a sheet with a short terminal length, and shifting the cutting timing,
It became possible to obtain sheets with different lengths and suppress the occurrence of slack.

Specifically, when the winding shaft is rotated and the sheet having the short length of the end portion reaches the corresponding cutting mechanism position, the rotation of the winding shaft is temporarily stopped. Then, the cutting mechanism is operated to cut the corresponding sheet.

The winding shaft is driven to rotate again, and when the sheet having the longer terminal length reaches the corresponding cutting mechanism position, the rotation of the winding shaft is stopped again. Then, the cutting mechanism is operated to cut the corresponding sheet. By rotating the winding shaft again, the specified wound product is obtained.

That is, in a sheet having a long terminal portion length, the distance between the terminal portion and the winding shaft at the cut position is very short, and there is no slack, and therefore the winding of the regular shape and dimension is performed. It becomes a thing.

However, there is also a problem here, and since the winding mechanism is operated at least twice during the winding operation after the winding shaft is stopped, the takt time becomes long and the productivity is adversely affected.

The cutting mechanism corresponding to a sheet having a short end portion is arranged in the vicinity of the winding shaft, but a cutting mechanism corresponding to a sheet having a long end portion is newly arranged. Will be done. Therefore, there is a problem in that the cutting mechanism has no room in the space around the winding shaft due to each cutting mechanism, which makes the design unreasonable and makes maintenance difficult.

For this reason, the space problem is solved by arranging the cutting mechanism at the position corresponding to the predetermined length as at the beginning, and even if all the cutting mechanisms are operated at the same time, the terminal section length is increased. Ideally, a long sheet will not sag and a highly accurate wound product can be obtained.

The present invention has been made in view of the above circumstances, and an object of the present invention is to shorten the tact time when cutting and winding a sheet-like conveyed product so that the terminal lengths are different. The present invention aims to provide a winding method and a winding device for a sheet-shaped conveyed product, which contributes to improvement in productivity, does not cause slack in the sheet-shaped conveyed product, and can obtain a wound product with high accuracy. Is.

[0019]

In order to satisfy the above object, the method for winding a sheet-like conveyed product according to the first invention is
According to claim 1, the front end edges of the respective sheet-like conveyed articles conveyed from different directions are bundled, and the sheet-like conveyed articles are wound by rotating in the bundled state, and the sheet-like conveyed articles are wound at specified positions. It is characterized in that each sheet-like conveyed product is cut at the same time, and only the long sheet-like conveyed product on the winding end terminal side holds the sheet-like conveyed product at a position near the winding portion.

In order to satisfy the above object, the winding device for a sheet-like conveyed object according to the second aspect of the present invention is, as claimed in claim 2, conveyed from different directions so that the lengths of the winding end terminals are different from each other. In the winding device of the sheet-like conveyed object which is wound after cutting the winding end terminal part of the plurality of sheet-like conveyed objects, the leading edge of the plurality of sheet-like conveyed objects conveyed from different directions is It is arranged at each position corresponding to the designated length dimension of each sheet-shaped conveyed product and the winding means that is bundled into one and rotates, and operates based on the stopping of the winding operation of the winding means. A plurality of cutting means for cutting the sheet-like conveyed article to be cut, and a cutting means arranged between the cutting means and the winding means of the sheet-like conveyed article whose length dimension is set to be long among the sheet-like conveyed articles. Holding the sheet-like conveyed product Characterized by comprising a regulating means for regulating the slack up.

According to a third aspect of the present invention, the winding means is provided with a slit in which a tip portion of a plurality of sheet-like conveyed objects can be inserted in a part of a peripheral surface along the axial direction, and the winding means is rotationally driven. Thus, it is a winding shaft for winding the sheet-like conveyed product around the peripheral surface thereof.

According to a fourth aspect, the regulating means according to the second aspect is a hollow body having a cylindrical shape with a bottom, and a plurality of through holes are provided on the peripheral surface thereof, and the hollow body communicates with a vacuum source. Then, the sheet-like conveyed product is vacuum-adsorbed on the peripheral surface thereof.

A fifth aspect of the present invention is characterized in that the hollow cylindrical body with a bottom according to the fourth aspect is rotatably supported. By providing the means for solving the above problems, in both the first and second inventions, it is possible to reduce the length of the terminal portion in winding a plurality of sheet-like conveyed objects whose rear edges are displaced from each other. Cut all at once regardless of length. And, since these sheet-like conveyed products are wound up, a short takt time is required.

Since the means for cutting the sheet-like conveyed product having the long terminal portion is arranged at the position corresponding to the length, the position is not particularly concentrated with other cutting means, and the arrangement space is wide.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Here, as a sheet-like conveyed product, three electrode sheets 1 each having a short terminal length are set.
The method and device for winding the separator sheets 4, 5 of 2, 3 and 2 sheets and the electrode sheet 6 having a long terminal length are applied.

As shown in FIG. 1, reference numeral 7 denotes a rotating substrate which is intermittently driven to rotate counterclockwise by a predetermined angle, that is, which is index-rotated by 120 °.

At the peripheral end of the rotary substrate 7, three winding shafts 9 (only one is shown) having slits 8 as winding means are provided in the radial direction and along the axial direction, respectively. Each of them is provided so as to be driven back and forth and rotationally driven in the direction of the paper surface.

On the other hand, a pair of delivery rollers 17 and 18 are arranged at an upper portion of the rotary substrate 7 in the figure. One of the delivery rollers (hereinafter, referred to as a first roller) 17 has a fixed position, is connected to a drive source (not shown), and is rotationally driven. The other delivery roller (hereinafter, referred to as a second roller) 18 is rotatably supported, but is supported so as to be capable of coming into contact with and separating from the first roller 17.

Then, in a state where the second roller 18 is separated from the first roller 17, the electrode sheets 1, 2, 3 and the separator sheets 4, 5 are sent out so as to be in rolling contact with the first roller 17. Conveyance paths 1A to 5A are formed, and also a conveyance path 6A through which the electrode sheet 6 is rolled and sent to the second roller 18 is formed.

The first and second rollers 1 are located at positions corresponding to the respective lengths of the electrode sheets 1, 2, 3 and the separator sheets 4, 5 whose terminal portion lengths are set to be short.
First to fifth cutting mechanisms 11 to 15 serving as cutting means are arranged at positions facing the conveying paths 1A to 5A relatively close to 7 and 18.

The first to fifth cutting mechanisms 11 to 15 are for cutting the sheets 1 to 5 which are conveyed on the opposed conveying paths 1A to 5A. Also,
A sixth cutting mechanism 16 is provided in the middle of the conveying path 6A of the electrode sheet 6 having a long terminal length and at a position far away from the second roller 18. The sixth cutting mechanism 16 performs a cutting action on only the electrode sheet 6.

Then, an adsorbing roller 20 as a restricting means is arranged so as to face a position very close to the second roller 18 in the conveying path 6A. FIG. 3 shows a specific structure of the suction roller 20. That is, the suction roller 20 itself is a hollow cylindrical body having a closed end, and has a two-step shape including a small diameter portion 20a on the support substrate 21 side and a large diameter portion 20b on the tip side. ing. Large diameter part 20b
A plurality of through holes 22 ... Are provided on the peripheral surface of the.

The small diameter portion 20a of the suction roller 20 is rotatably supported by a bearing member 23 provided on the support substrate 21,
Moreover, the terminal portion thereof penetrates the support substrate 21 and is projected to the outer surface side. The protruding end of the small diameter portion 20a is connected to a vacuum pump 25 as a vacuum source via a connecting pipe 24.

The schematic structure of the sheet winding device is as described above, and the operation of winding the next sheet will be described. FIG.
This state is the start of the winding operation. At this time, the leading ends of the respective sheets 1 to 6 are hooked on the slit 8 of the winding shaft 9 and are stacked together. Each sheet 1 as required
It goes without saying that the tip portions of Nos. 6 to 6 are displaced.

The winding shaft 9 is driven to rotate counterclockwise. When the winding shaft 9 rotates by a predetermined number of rotations, the winding shaft 9 is temporarily stopped. At that timing, as shown in FIG. 2, the first to sixth cutting mechanisms 11 to 16 are simultaneously actuated to simultaneously cut the opposing electrodes and the separator sheets 1 to 6.

Further, as shown by the chain double-dashed line in the figure, the second
The roller 18 is driven to come into rolling contact with the first roller 17. Between the rollers 17 and 18, sheets 1 to 6 cut into a predetermined length are superposed and sandwiched by one.

The rotation of the winding shaft 9 is restarted again. Each sheet 1 cut by the first to fifth cutting mechanisms 11 to 15
Sheets 5 to 5 are set to have short terminal lengths, and the distance from the portion sandwiched between the first and second rollers 17 and 18 to the cut terminal portion is extremely short.

Since the rotation of the winding shaft 9 is restarted,
The distance from the second rollers 17 and 18 to the protruding terminal portion is further shortened. Therefore, in each of the sheets 1 to 5 whose terminal portion length is set to be short, there is no slack and no wrinkle in the process of being wound around the winding shaft 9.

Since only the sixth cutting mechanism 16 is far away from the nipping position of the first and second rollers 17 and 18, the length of the end portion of the cut electrode sheet 6 is long. Therefore, although the slack is normally generated on the way from the sandwiching position of the rollers 17 and 18 to the terminal portion, here, the suction roller 2 is provided near the sandwiching position of each roller.
No. 0 is arranged, and as shown in FIG. 3, the middle part of the electrode sheet 6 is vacuum-sucked.

The suction action of the sheet 6 by the suction roller 20 is continued while the winding shaft 9 is rotating. Sheet 6
Suction roller 20 suction portion and first and second rollers 17, 1
The pin 8 and the pinching portion 8 are stretched linearly with the pin, and are continued until the end portion passes the suction roller 20.

Moreover, since the suction roller 20 is rotatably supported, the winding shaft 9 does not have a resistance to the winding, and the winding is smoothly performed. After all, even the electrode sheet 6 having a long terminal portion length has the same form as the sheets 1 to 5 having a short terminal portion length as described above, and the winding shaft 9
There is no slack and no wrinkles in the process of being wound around.

In this way, even if the sheets having different terminal lengths are cut all at once, no winding deviation occurs and a wound product having a regular diameter can be obtained. Moreover, since a plurality of sheets are cut all at once, the rotation stop of the winding shaft 9 during winding is only required once, the tact time can be shortened, and the productivity is increased.

Further, there is an advantage that all the cutting mechanisms are not concentrated near the winding shaft 9, there is a margin in the arrangement of the device, and the maintenance can be easily performed. In addition, in the above embodiment, the suction roller 20 is replaced with the bearing member 2.
Although it is configured to be rotatably supported via 3, the adsorbent 30 as shown in FIG. 4 is not limited to this.
It may be.

That is, the adsorbent 30 is a hollow body having a closed structure in which only the adsorbing surface of the sheet 6 is a curved surface formed to have a predetermined curvature, similarly to the fact that the adsorbent 30 is communicated with a vacuum pump (not shown).

A plurality of through holes 22 are provided on the suction surface so that the sheet 6 can be vacuum-sucked. Adsorbent 30
Since the structure itself is fixed here, some resistance to the winding operation of the winding shaft 9 cannot be avoided, but the degree of resistance can be minimized by adjusting the vacuum pressure. .

[0046]

As described above, according to the winding method and the winding device for a sheet-like conveyed product according to the first to fifth aspects of the invention, the sheet and the terminal length of which the terminal length is set to be short are set. Even if a sheet with a long length is cut at the same time, winding deviation does not occur, a highly accurate wound material can be obtained and reliability can be improved, and takt time can be shortened. Contributes to improved productivity. And all the cutting mechanisms can be placed near the winding axis without concentrating,
There is a margin in the arrangement space, and it is easy to perform maintenance.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a winding device for a sheet-like conveyed product, showing an embodiment of the present invention.

FIG. 2 is a view for explaining the winding process of the sheet-like conveyed product according to the first embodiment.

FIG. 3A is a vertical cross-sectional view of an adsorption pipe and its pivot structure. (B) is a cross-sectional view of the adsorption pipe.

FIG. 4 is a vertical cross-sectional view of a sheet-like conveyed object adsorbent according to another embodiment.

FIG. 5 is a diagram illustrating a sheet structure of a lithium ion secondary battery.

[Explanation of symbols]

 1 to 6 (sheet-like conveyed product) sheets, 9 ... (winding means) winding shaft, 11 to 16 ... (cutting means) cutting mechanism, 20 ... (regulating means) suction pipe.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location H01M 10/40 H01M 10/40 Z

Claims (5)

[Claims] 1. A sheet-shaped conveyed product is bundled at the front edge of each sheet-shaped conveyed product which is conveyed from different directions, and the sheet-like conveyed product is wound around the bundle by rotating in a bundled state. A sheet-like conveyer characterized in that each sheet-like conveyer is cut at the same time and only the long sheet-like conveyer on the end of winding side holds the sheet-like conveyer near the winding portion. How to wind things. 2. A sheet-like conveyed article which is conveyed from different directions and is wound after cutting the winding-end end portion of a plurality of sheet-like conveyed articles so that the lengths on the winding-end terminal side are different from each other. In the winding device, a winding unit that rotates by binding the leading edges of a plurality of sheet-like conveyed objects conveyed from different directions into one, and a specified length dimension of each sheet-like conveyed object. A plurality of cutting means which are arranged at respective positions corresponding to, and which operate based on the stop of the winding operation of the winding means to cut the corresponding sheet-like conveyed article, and the length dimension of the sheet-like conveyed article. Is provided between the cutting means and the winding means for setting the sheet-like conveyed material set to be long, and the regulating means for holding the sheet-like conveyed material and regulating the slack to the winding means. For winding a sheet-like conveyed product 3. The winding means is provided with a slit into which a tip portion of a plurality of sheet-like conveyed objects can be inserted in a part of a peripheral surface along the axial direction, and the peripheral surface of the winding means is rotationally driven. The winding device for winding the sheet-like conveyed product according to claim 2, wherein the winding device is a winding shaft for winding the sheet-like conveyed product. 4. The restricting means is a hollow body having a cylindrical shape with a bottom, and a plurality of through holes is provided on the peripheral surface thereof, and the hollow body communicates with a vacuum source, and a sheet is provided on the peripheral surface thereof. The apparatus for winding a sheet-like conveyed article according to claim 2, wherein the sheet-like conveyed article is vacuum-sucked. 5. The winding apparatus for a sheet-like conveyed product according to claim 4, wherein the cylindrical hollow body having a bottom is rotatably supported.