JPH11278580A - Belt-shaped article winding body packaging tool, moistureproof packaging film, and packaged body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate automation of a packaged state of a belt-shaped article winding body and improve moistureproof performance. SOLUTION: Two side plates 2 for covering both end faces 17 of a belt- shaped article winding body 15 as a packaging tool and clamping the body and bands wound around the whole of the side plates and protruding are used. Through-hole 2 are formed on the centers of respective side plates 1, and supporting protrusions 10 fitted in a central through-hole 18 of a hub 19 are formed on the vicinity of the edges of the central through-holes 2 of inner side faces 9 of respective side plates 1, and position register recessed sections or through-holes 3 with the side plates 1 facing outer side faces 4 of respective side plates 1 are formed, and band storage channels 5 and 7 of the disk for storing the bands not protruded from the surfaces of the side plates 1 are formed on the outer side faces 4 and the outer peripheral faces 6 of respective side plates 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrapping device for wrapping a roll of a band-shaped article having a large weight, such as a raw material of an electrode of a lithium ion secondary battery, which causes a problem due to moisture absorption, and a moisture proof. The present invention relates to a packaging film and a package.

[0002]

2. Description of the Related Art Conventionally, when electrodes of a lithium ion secondary battery are transported between factories or internationally, the state before cutting into a width or length as a finished product, that is, a strip-shaped raw material or a raw material is used. The products that are simply cut to the product width are wound around a hub, packaged, and transported and stored. However, the characteristics of such an electrode wound body are significantly deteriorated by moisture. In addition, the wound electrode body is heavy, and the weight of the packaged article is 20%.
over kg. Therefore, packaging that is generally performed for articles whose characteristics are deteriorated by absorption of moisture, that is, sealed packaging performed by using a moisture-proof film for the packaging material and enclosing a moisture absorbent such as silica gel, Vacuum packaging or nitrogen-filled packaging cannot be used.

[0003] The applicant of the present invention has applied several windings of an electrode material or the like of a lithium ion secondary battery, and inserted the cores into the central through-holes of the hubs by using a core. Japanese Patent Application No. 9-302 discloses a moisture-proof package for accumulating and packaging bodies.
727 was presented. In this moisture-proof package, a package is formed through the following steps. First, a thickness of 100 μm,
A long electrode sheet having a width of about 60 mm and a hub having an outer diameter of about 120 mm having a central through hole having an inner diameter of about 76 mm have an outer diameter of 500 mm.
An electrode wound body of about 30 kg wound up to about mm is prepared. Next, a PVC pipe serving as the center of the package is externally fitted to the cantilever shaft fixed to the cart, and the electrode winding body in which a buffer material is disposed in the center of the center of the package is inserted into the hub center through-hole. The core is fitted so that it fits, and several volumes are accumulated. At this time, a sheet-shaped spacer made of foamed polyethylene is disposed on both end surfaces of the electrode winding body as a cushioning material.

Next, the integrated electrode winding body is covered with a tubular moisture-proof film, and both ends of the film are squeezed and bound around both ends of a central core projecting to both sides from the integrated electrode winding body. I do. At this time, since wrinkles are likely to be generated in order to narrow down the film, an elastic sheet is wound around the core and bound from above. In addition, a film having a thickness of 60 μm or less is used for the moisture-proof film in order to suppress wrinkles generated when the film is narrowed down. In addition, means such as a rubber band or an insulating lock is used for binding. In addition, a moisture absorbent such as silica gel is put in the moisture-proof film to absorb moisture in the air in the film.
Finally, such a package is housed in a wooden box supporting both ends of the core, covered with a lid or a display step ball, and wrapped with a polypropylene band around the entire body and bound to form an outer package. Is applied.

[0005]

However, in this moisture-proof packaging, the core is used, and both ends of the moisture-proof film covering the integrated electrode winding body are respectively squeezed around both ends of the core protruding to both sides. Due to the binding, wrinkles tend to occur when the film is narrowed down, and it is difficult to maintain airtightness. Therefore, the moisture-proof film must have a thin and soft structure in order to minimize wrinkles, for example, when the thickness of nylon or polyethylene terephthalate is 10
A base material having a thickness of about 20 μm is subjected to vapor deposition of aluminum or silicon oxide, and the deposited layer is further subjected to heat-sealing such as polyethylene.
It is obtained by dry laminating a wood material. However, such a thin moisture-proof film cannot cope with various distribution environments.

The following table shows the results of an accelerated test in which the above moisture-proof film was stored in a thermostat at a temperature and humidity of 40 ° C., 80% and 60 ° C., 90%. In the test, the appearance and the adhesive strength of the electrode coating film are evaluated. From the above table, it can be seen that a problem occurs as the period becomes longer, and that when the temperature and the humidity are higher, the problem tends to be accelerated and the temperature is fragile when the temperature rises.

In order to solve such a problem, use of a moisture-proof film having excellent heat resistance can be considered. For example, 20
A 7 μm thick aluminum foil is laminated on a 25 μm thick polyethylene film through a 25 μm thick polyethylene, and a polyethylene film having a thickness of about 25 μm is used as a sealing material. Then, the total thickness of the constituent materials is 80
The thickness becomes as large as about μm, and wrinkles easily occur. In addition, aluminum foil is weak to bend, and a pinhole-shaped hole or the like is formed in the bent portion, so that the moisture-proof performance is deteriorated and is not suitable for use.

However, the moisture-proof performance of the moisture-proof packaging basically depends largely on the moisture-proof film, and it is essential to use a moisture-proof film with higher performance. In the case of relatively easy-to-handle materials such as lightweight materials and powders, heat welding for sealing the moisture-proof film can be easily performed. In addition to reducing the human burden during packaging, emphasis must be placed on preventing accidents.

The present invention has been made in view of such a conventional problem, and it is easy to automate the packaging form of a roll of a strip-shaped article, and the strip-shaped article can have excellent moisture-proof performance. An object of the present invention is to provide a wound package, and further provide a moisture-proof packaging film for a wound product and a package for a wound product.

[0010]

In order to achieve the above object, a wrapping device for a strip-shaped article according to the present invention is formed by winding a strip-shaped article around a hub having a through hole in the center. And two bands that cover and hold both end surfaces of the belt-shaped article, and a band that wraps around the two side plates that clamps the band-shaped article wound body and binds the whole. A through hole is provided at the center of each of the side plates, and a support protrusion that fits into the center through hole of the hub is provided near the edge of the central through hole on the inner side surface of each of the side plates. A concave portion or through hole is provided for positioning with a side plate facing the side plate, and a band storing groove is formed on the outer side surface and the outer peripheral surface of each side plate so that the binding band can be stored so as not to protrude from the surface of the side plate.

In the moisture-proof packaging film of the present invention, a plastic film is used as a base material for the moisture-proof film used for the packaging of the rolled article. An aluminum foil is laminated, and a plastic film is laminated on the aluminum foil to form a laminate.

Further, in the band-shaped article roll body package of the present invention, the both end faces of the band-shaped article roll are covered with two side plates and clamped.
The whole is hermetically sealed with a moisture-proof film to form a single wrapped body, and the single wrapped body is vertically oriented with both end faces of the band-shaped article wrapper included in the package. A plurality of single wound bodies are laid flat as described above, and the whole is hermetically packaged with a plastic film to form a multiple wound body package. Apply.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view showing a packaging process for an electrode winding body for a lithium ion secondary battery by an electrode winding body packaging device to which the present invention is applied, and FIG. 2 is a side view showing an outer side surface of a side plate provided in the electrode winding body packaging device. It is the side view seen. This electrode winding package includes two side plates and a binding band. Then, as shown in FIG. 2, a square plate having high strength obtained by blow molding hard plastic or the like is used for each side plate 1. This is because not only is the weight of the electrode wound body for lithium ion secondary batteries heavy, but the raw material of the electrode is made of aluminum foil or copper foil with a thick coating film that adheres to it, and has undergone a rolling process. The tensile strength is extremely low, and the winding tension cannot be increased. Therefore, when a lateral force is applied to the electrode winding body, that is, a force in a direction perpendicular to both end surfaces thereof, a step shift or the like is likely to occur, and it is necessary to clamp the electrode winding body between both side plates 1 having high strength. It is.

Further, each side plate 1 has a vertically and horizontally symmetrical structure, and the structure, size and the like of both side plates 1 are made the same. Therefore, large-diameter through-holes 2 are provided at the center of each side plate 1, and small-diameter through-holes 3 are provided near the upper and lower sides of the central through-hole 2 at equal distances from the central through-hole 2. At that time, each side plate 1
Three through holes 2 along a vertical line that bisects the right and left
So that 3 lines up. A band storage groove 5 having a depth capable of storing the binding band so as not to protrude from the surface of the side plate 1 is formed on the side surface 4 facing the outside of each side plate 1 in a cross-girder shape. At this time, the two band storage grooves 5 are disposed so as to be parallel to the horizontal upper and lower outer peripheral surfaces 6 and the two band storage grooves 5 are parallel to the vertical left and right outer peripheral surfaces 6. I do. Moreover, band storage grooves 7 are also formed on the outer peripheral surface 6 of each side plate 1 such that portions corresponding to the eight extended portions of the respective ends of the band storage grooves 5 cross the outer peripheral surface 6 of each side plate 1. I do. The outer peripheral surface 6 of each side plate 1
Each corner 8 is chamfered. Note that a small-diameter recess may be provided on the outer side surface 4 instead of the small-diameter through hole 3.

Further, the side surface 9 facing the inside of each side plate 1 is formed from the vicinity of the upper and lower edges of the central through hole 2 facing the inner side surface 9.
In this case, arc-shaped support protrusions 10 are respectively provided in the vertical direction (see FIG. 3). Each of the support projections 10 is provided with a central through hole 2.
Are respectively integrated with the arc-shaped projections 11 protruding toward the center from the opposing upper and lower inner surfaces, and correspond to opposing quarter-arc portions of the concentric cylinder fitted into the substantially central through hole 2. However, the inner diameter of the support protrusions 10 is made equal to that of the protrusions 11 integrally connected to the respective support protrusions 10, but the outer diameters thereof are made different, and the support protrusions 10 are made larger.

Immediately outside the two support projections 10, a hub fitting groove 12 having a width concentric with the center through hole 2 and having a depth substantially equal to the width is formed on the inner side surface 9 of each side plate 1. Form each. In addition, recesses 13 are formed slightly outside the hub fitting groove 12 and concentrically with the central through-hole 2, have a wide width and reach near the outer peripheral surface 6 of the side plate 1, and have a shallow depth. . Then, a plastic spacer 14 made of foamed polyethylene or the like is fitted in each of the recesses 13 such that one surface side is half-fitted into the recess 13 and the other surface side is half-projected.
Each of the foam spacers 14 is a cushioning material, and is used to flexibly contact and protect both end faces 17 of the wound electrode 16 of the electrode winding body 15.

At the time of packaging, first, the both side plates 1 are wound with the electrode winding body 1.
Attach to 5. At this time, as shown in FIG.
5 is set such that both end faces 17 are in the left-right direction, the respective side plates 1 are arranged on both sides of the electrode winding body 15, and the inner side faces 9 are set up toward the corresponding end faces 17. However, as described above, this electrode wound body 15 is formed by connecting a long electrode sheet having a thickness of 100 μm and a width of about 60 mm to a hub 19 having an outer diameter of about 120 mm and a central through hole 18 having an inner diameter of about 76 mm.
It is a heavy object of about 30 kg wound up to about 00 mm. Moreover, the electrode winding body 15 cannot be easily handled due to the brittleness of the coating film. Therefore, using the hub 19 in which the width of the central portion 20 is set to about 80 mm, the hub central portion 20 is protruded from both sides of the wound electrode 16 by 10 mm on both sides.

Then, the hub 19 is supported by two plate-like support arms 21 arranged in parallel as shown in FIG. 1, and the electrode winding body 15 is removed from a winding device (not shown). The side plates 1 can be arranged respectively. At this time, the small-diameter distal ends 23 of the columnar support arms 22 are inserted one by one into each central through-hole 2 from the left and right outer sides of each side plate 1, and small-diameter through-holes 3 located above and below each central through-hole 2. Each of the side plates 1 is inserted in the vicinity of the distal end thereof, and the dotted line position at the center near the upper and lower ends of the respective outer side surfaces 4 is supported by the suction cup provided at the distal end of the side plate supply tool 25, and each side plate 1 is supported. It moves toward the corresponding position of the electrode winding body 15, respectively.

Then, both the support projections 10 of the side plates 1 and the support arms 22 fitted therein can be inserted into the central through holes 18 of the hub 19 from both sides of the electrode winding body 15. However, it is necessary to fit both projections 10 of each side plate 1 in the central through hole 18 to form a cylindrical shape. Therefore, for example, the right side plate 1 is rotated by 90 ° from the position shown in FIG. 1 using the side plate positioning pins 24 to align the two side plates 1. After the support projections 10 and the support arms 22 of each side plate 1 are fitted into the central through hole 18 of the hub 19, the two support arms 21 supporting the hub 19 are released from the electrode winding body 15. I do. Further, the two support portions 10 of each side plate 1 are inserted into the central through holes 18 of the hub 19, respectively, and the center portions 20 of the hub 19 are respectively inserted into the grooves 12 outside the both support portions 10 of each side plate 1. Fit. Then, the foam spacers 14 provided on the respective side plates 1 cover and contact both end surfaces 17 of the electrode winding body 15 respectively. Since the support of the electrode winding body 15 is unstable only with the two support projections 10 fitted into the hub central through-holes 18 of each side plate 1, the support arms 22 fitted into the central through-holes 2 of each side plate 1 are unstable. Further, the electrode winding body 15 is supported.

After sandwiching the electrode winding body 15 between the two side plates 1, a band made of polypropylene or the like is wrapped around the both side plates 1 holding the electrode winding body 15 while the support arm 22 is inserted. At this time, the support arm 22 and the side plate positioning pin 24
By using, the entirety of both side plates 1 and the like can be easily rotated by 90 °. Then, while appropriately rotating the whole, the band 26 is fitted into the grooves 5, 7 of each side plate 1 as shown in FIG.

As described above, the support arms 21 and 22 and the side plate positioning pins 2 used for the electrode winding body support and the like in the packaging apparatus are provided.
4. When the electrode winding body 15 is sandwiched between the two side plates 1 and the band 26 is wound around and bound, etc., the electrode winding body 15 is automatically provided. 15, the packaging tool 27 can be easily attached. In addition, the packaging state is good, and the rolled electrode 16 is less likely to be displaced, which is suitable for further automation of packaging.

In order to maintain the moisture-proof performance of the electrode winding body 15 with the packaging equipment mounted thereon in an advanced state, aluminum foil is used for the moisture-proof film for packaging. Is laminated. However, since it is difficult to laminate a plastic film on both sides of the aluminum foil, a plastic film is used as a base material of the moisture-proof film, and the aluminum foil is laminated on one side facing inward when the base material is used for packaging. A laminate is formed by laminating a plastic film on the aluminum foil. When a moisture-proof film is used as a bag, if a polyethylene resin or the like as a heat seal material is further adhered to the inner surface of the bag, the moisture-proof property can be more easily maintained.

As shown in FIG. 5, such a moisture-proof bag 28 has one end 29 closed and an opening 30 provided at the other end.
In order to store the electrode winding body 15 with the package attached inside,
It is formed in a box shape having a storage space according to its outer shape.
Then, at the time of packaging, the moisture-proof bag 28 is covered from above with the electrode winding body 15 with the packaging tool attached upright, and further covered with a cylindrical buffer spacer 32 having openings 31 at both ends. Thereafter, the whole is rotated 90 ° by a tipping device and placed flat, and the open end 32 of the moisture-proof bag 28 is heated to 200 ° C.
With a certain heater block, a pressure of about 1 kgf is applied and sandwiched for 3 seconds to heat seal.

Then, as shown in FIG. 6, the electrode winding body 15 with the packaging device mounted thereon is hermetically sealed in a moisture-proof bag 28, and a single winding body package 33 whose central part is covered with a buffer spacer 32 is completed. . When forming the moisture-proof bag 28, one end 29
Each bonding such as closing first is also performed by the heater block. When the adhesive surface of such a heater block is formed into a wavy curved surface rather than a flat surface (flat), heat seal strength is increased, and uneven bonding is less likely to occur. Further, it is preferable to evacuate the air inside the moisture-proof bag 28 before the heat seal is performed, so that the reliability of the moisture-proof bag 28 is improved, and at the same time, the case where the moisture-proof bag 28 has an accident such as a hole is found. Becomes easier. Band storing grooves 5 and 7 are provided on the outer side surface 4 and the outer peripheral surface 6 of each side plate 1, and the band 26 storing the depth thereof is attached to the side plate 1.
The reason for preventing the moisture-proof bag 28 from being broken is that the band 26 comes into contact with the inner surface of the moisture-proof bag 28 to prevent the moisture-proof bag 28 from being broken. Further, when the outer peripheral surface 6 of each side plate 1 is formed in a round shape, even if the outer peripheral surface 6 comes into contact with the inner surface of the moisture-proof bag 28, the risk of breaking the moisture-proof bag 28 is reduced, which is preferable.

The single wound body package 33 is laid flat so that both end faces 17 of the electrode wound body 15 included in the package are vertically oriented, and is stacked in several stages. Pack in bag making. At that time, as shown in FIG. 7, first, a plastic bag 35 having one end closed is spread and placed inside the pallet tray 34 with feet placed on a lift (not shown) with the opening 36 facing upward. The single wound body packages 33 are sequentially put therein and stacked, for example, in four stages. Thereafter, the plastic bag 35 is evacuated, and its open end 37 is similarly closed with a heater block, thereby opening the heat shield.
Toseal. Then, a multi-wrap package 38 in which the four single-wrap packages 33 are hermetically packaged in a plastic bag 35 is completed. When forming the single wound body package 33, the buffer spacer 32 is covered after covering the moisture-proof bag 28 because the moisture-proof bag 28 is rubbed and misplaced when the single wound body package 33 is stacked. Therefore, the buffer spacer 32 can be omitted.

Thereafter, as shown in FIG. 8, a tubular reinforcing corrugated cardboard 40 having openings 39 at both ends and a cap-shaped reinforcing corrugated cardboard 41 are placed on the plural wound package body 38 from above, respectively. Packaging. Then, as shown in FIG. 9, the band 26 is wrapped around the entire body to be bound and united. When the electrode wound package 42 is completed in this way, the moisture-proof bag 28 is formed from the moisture-proof film, and each bonding performed until the opening end 32 of the moisture-proof bag 28 is closed is a general planar shape. Since the heat-sealing method can be used, high moisture-proof performance of a heat-resistant moisture-proof film can be expected. In addition, the moisture proof effect of the plastic bag 35 can be expected. Therefore, under various environmental conditions such as ordinary land transportation, aircraft transportation, and ship transportation, it is possible to guarantee transportation by container transportation and the like, and it is possible to sufficiently guarantee long-term storage.

[0027]

According to the present invention described above, claim 1
In the described invention, the two side plates are used to cover and hold both ends of the band-shaped article wound body, and when the band is hung, each side plate is freely rotated and supported using the central through hole, and the band-shaped product is used. An article roll can also be supported. Further, the positioning with the side plate facing each other can be performed by using the concave portion or the through hole provided on the outer surface of each side plate. In addition, the support protrusion provided near the edge of the central through hole on the inner side surface of each side plate can be fitted into the central through hole of the hub to support the strip-shaped article roll. Therefore, the two side plates and the band, which are wrappers, can be easily attached to the band-shaped article roll, and automation is easy.

Then, the packaging state becomes good, and the rolled band-shaped article is less likely to be displaced. Also, since the band storage grooves provided on the outer side surface and the outer peripheral surface of each side plate are set to a depth that allows the band to be stored so that the band does not protrude from the surface of the side plate, there is a possibility that the band may damage the moisture proof film etc. which is subsequently packaged. Absent. Therefore, the packaging form is suitable for automation, and the moisture-proof performance can be made excellent.

According to the second aspect of the invention, by interposing the aluminum foil layer in the moisture-proof film, the flexibility of the film is increased, and the moisture-proof performance can be maintained at a high level. Further, by laminating a plastic film on both sides of the aluminum foil, the film can be hardly torn. Therefore,
The moisture-proof film becomes suitable for packaging of the rolled article.

According to the third aspect of the present invention, the single-sided wrapping formed by protecting the both end faces of the wrapping of the band-shaped article with two side plates and sealingly wrapping the whole with a moisture-proof film. The packaged state of the body is good and the body is easy to handle, the rolled band-like article is hardly displaced, and the moisture-proof performance is excellent. In addition, when a plurality of single-wound body packages are stacked on a flat surface and stacked and sealed with a plastic film to form a plurality of wound-body packages, the moisture-proof performance is further improved. Further, by applying the outer wrapping to the plurality of wrapped body packages, the strip-shaped wrapped body package is suitable for transportation under various environmental conditions and long-term storage.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a packaging process for an electrode winding body for a lithium ion secondary battery by an electrode winding body packaging device to which the present invention is applied.

FIG. 2 is a side view showing a side surface facing outward of one side plate constituting the electrode winding body packaging tool.

FIG. 3 is a front view showing a correspondence relationship between two side plates and an electrode winding body constituting the electrode winding body packaging tool when the packaging tool is mounted.

FIG. 4 is a perspective view showing the wound electrode body with the packaging device attached.

FIG. 5 is a perspective view showing a process of covering the electrode winding body with the packaging device mounted thereon with a moisture-proof bag and a buffer spacer.

FIG. 6 is a perspective view showing a single wound body package of the electrode wound body.

FIG. 7 is a perspective view showing a process of stacking a plurality of single-wound body packages to form a multi-wound body package.

FIG. 8 is a perspective view showing a process of covering the reinforced outer corrugated cardboard on the multi-wrap body package.

FIG. 9 is a perspective view showing the completed wound electrode package.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Side plate 2, 18 ... Center through hole 3 ... Small diameter through hole 4
... Outer side surface 5,7 ... Band storage groove 6 ... Outer peripheral surface 9 ...
Inner side surface 10: Support projection 12: Hub fitting groove 13: Spacer installation recess 14: Foaming spacer 15: Electrode wound body 16: Wound electrode 17: End face 19: Hub 20: Hub central part 21, 22 … Support arm 24
… Side plate positioning pin 25… side plate feeder 26… band 27… packing device 28… moisture proof bag 32… buffer spacer 33… single wound package 34… pallet tray 3
5 ... Plastic bag 38 ... Multi-wrapped package 4
0, 41: Reinforced corrugated cardboard for exterior use 42: Electrode wound package

Claims (3)

[Claims] 1. A belt-shaped article wound body formed by winding a belt-shaped article around a hub having a through hole in the center, two side plates for covering and holding both end surfaces of the band-shaped article wound body, In a band-shaped article wound body packaging device comprising a band wound around both side plates and bound together, a through hole is provided at the center of each of the side plates, and an edge of the center through hole on an inner side surface of each of the side plates. The hub is provided with a support projection that fits into the central through-hole of the hub, a concave portion or a through-hole is provided for alignment with a side plate facing the outer side surface of each side plate, and the outer side surface and the outer peripheral surface of each side plate are further provided. A band-shaped article wound body packaging device, wherein a band storage groove having a depth capable of storing the binding band so as not to protrude from the surface of the side plate is formed. 2. A plastic film is used as a base material for a moisture-proof film used for packaging of a rolled article, and an aluminum foil is laminated on one side facing inward when the base material is used for packaging. Laminate plastic film
A moisture-proof packaging film for a roll of a rolled article, wherein the film is a laminated body. 3. A single wound package is formed by covering both end surfaces of a roll of a strip of article with two side plates and sealingly packaging the whole with a moisture-proof film. The wound body package is laid flat so that both end faces of the band-shaped article wound body included in the package are vertically oriented, and a plurality of the single wound bodies are stacked, and the whole is formed on a plastic film. A plurality of wound body packages are formed by sealing and packaging to form a plurality of wound body packages, and the outer package is further applied to the plurality of wound body package bodies.