JP2000263154A - Manufacture of spread mesh sheet and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a extremely thin spread mesh sheet which is necessary to the collecting body of a miniatured and thinned cell. SOLUTION: A laminated metallic sheet B in which plural thin metallic sheets are laminated is conveyed to a slit forming part 11, minute slits are formed on the face except the middle part and both side parts in the width direction of the laminated metallic sheet B by a slit forming part 11 and, by stretching the slitted parts formed by a stretching part 12, the slits are opened and a laminated mesh sheet C is formed. The laminated mesh sheet C is separated into each one mesh sheet D in a separating part 16 and the mesh sheet is worked into the spread mesh sheet E by being rolled in regular rolling parts 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expanded mesh sheet used for a current collector of a battery, and more particularly, to the formation of a fine lath structure which can be used as an electrode plate of a small and thin battery. The present invention relates to a method for manufacturing a spread mesh sheet and an apparatus for manufacturing the same.

[0002]

2. Description of the Related Art Positive and negative plates of a battery, which are formed by laminating an arbitrary number of positive and negative plates with a separator interposed therebetween, use a mixture containing positive and negative active materials in a core material serving as a current collector. It is formed by coating. The current collector is formed in a mesh structure in order to securely carry the mixture. As shown in FIG. 14, this mesh structure is formed by forming slits a in the metal sheet A intermittently and in a staggered manner, and at the same time, swelling portions c in opposite positions at positions where the slits a overlap each other at adjacent positions. To form When the metal sheet A having the slit formed as described above is pulled so as to expand in the width direction as shown in FIG. 15, the slit a is expanded, and the linear portion d in which the bulging portion c is extended becomes the knot portion b. To form a spread mesh sheet having a mesh structure connected by the above.

As shown in FIG. 14, a slit is formed by feeding a metal sheet between an upper die and a lower die of a rotary cutter having disk-shaped cutters arranged in parallel. No. 2,568,285. Further, a reciprocating type in which a metal sheet is fed between an upper die and a lower die in which plate-shaped cutters are arranged in parallel to form a slit is proposed by the present inventors as Japanese Patent Application No. 10-62663. Have been.

[0004]

With the recent progress in miniaturization, weight reduction, and thinning of portable equipment, similar demands have been made for batteries as power sources thereof. In order to satisfy this requirement, it is necessary to process a thinner metal sheet into a mesh structure for the current collector serving as the core material of the positive and negative electrode plates of the battery. However, processing a thin metal sheet into a fine mesh structure involves problems such as deformation during transport to each processing step, breakage during slit processing and expansion, and the like, and further lowers cost. It is also required to manufacture and reduce the cost of the battery itself.

An object of the present invention is to provide a manufacturing method and an apparatus for processing a thin expanded mesh sheet accurately and with high productivity using a thin metal sheet.

[0006]

According to a first aspect of the present invention, there is provided a method for manufacturing a spread mesh sheet, comprising: forming a plurality of long sheets on each other; To form a plurality of slits intermittently and in a zigzag pattern in the laminated long sheet, and then the laminated long sheet is stretched by being pulled in a direction perpendicular to the slit direction to form slits. It is characterized in that the part is spread so as to be in a mesh state, and even if the long sheet is a thin material, multiple sheets are overlapped so that rigidity is maintained, and guides during transport and spread when spreading Deformation or breakage due to tension is suppressed. In addition, by separating each sheet after processing, a plurality of spread mesh sheets can be obtained, and productivity can be improved.

[0007] In addition, by providing a non-slit portion at a predetermined portion of the laminated long sheet and manufacturing the spread mesh sheet, a lead connection portion of the current collector can be formed using the non-slit portion. It is suitable for battery production.

Further, by rolling and flattening the spread laminated long sheet, unevenness due to the spreading is flattened, and a thinner mesh sheet can be formed.

[0009] Further, by pulling out the spread laminated long sheets in different directions for each one of the laminated sheets, it is possible to take out each spread sheet as a spread mesh sheet. At the same time, it can be processed into a mesh sheet, so that productivity can be increased.

[0010] In addition, by separating the spread laminated long sheets one by one and then rolling, the separation is easy and at the same time, the flattening by rolling is surely performed.

[0011] Further, the laminated long sheet is formed by laminating a plurality of long sheets in a plurality of layers, so that a plurality of spread mesh sheets can be simultaneously processed.

Further, the laminated long sheet is formed by folding the long sheet into a processing width in the width direction and overlapping the plurality of layers, so that when the folded state is developed after processing, a wide spread mesh sheet is obtained. At the same time, the processing width of the mesh forming part for processing this is reduced, and a wide spread mesh sheet can be manufactured without increasing the size of the device configuration.

According to a second aspect of the present invention, there is provided an apparatus for manufacturing a spread mesh sheet according to a second aspect of the present invention, wherein a plurality of long sheets are stacked and stacked in the longitudinal direction. Conveying means, a slit forming means for intermittently and staggeredly forming a plurality of slits in the laminated long sheet fed by the conveying means, and Stretching means for stretching the slit by stretching in the orthogonal direction to process the slit forming part into a mesh state, even if the long sheet is a thin material, a plurality of sheets. Are superimposed, rigidity is maintained, and deformation or breakage due to tension in the guide in the conveying means or in the stretching means is suppressed. In addition, by separating each sheet after processing, a plurality of spread mesh sheets can be obtained, and productivity can be improved.

Further, the slit forming means forms the both ends of the plate material having a plurality of convex portions at a predetermined pitch on the blade portion of the shearing cutter, and cuts off the blade portions between the convex portions alternately left and right. An upper mold and a lower mold are formed by laminating a plurality of plate-shaped cutters at substantially the same interval as the thickness of the plate-shaped cutter, and the two molds are displaced in the overlapping direction at the thickness. The upper die and / or the lower die are driven forward and backward in the opposite direction to form a slit in the laminated long sheet fed between the opposite sides of the two dies. Since a large number of slits can be formed at the same time, the productivity is high, and the plate-shaped cutter can be formed thin, so that a fine mesh structure can be formed by forming finer slits.

Further, the slit forming means forms the peripheral surface of a disk having a plurality of convex portions formed at a predetermined pitch on the blade portion of the shearing cutter, and cuts the blade portions between the convex portions alternately left and right to form a circle. A plate-shaped cutter is formed, an upper mold and a lower mold are formed by stacking a plurality of the disc-shaped cutters at substantially the same interval as the thickness dimension thereof, and the two molds are overlapped in the thickness direction. The upper and lower dies are rotated and driven to rotate, and a continuous slit is formed in the laminated long sheet fed between the upper and lower dies. The productivity can be improved by forming the slit.

The slit forming means forms an edge of a plate material having a plurality of convex portions formed at a predetermined pitch on a blade portion of a shearing cutter, and cuts off the blade portion between the convex portions to form a slit forming cutter. The slit forming cutter can be configured to be reciprocating type in which the slit forming cutter is driven to advance and retreat toward the receiving blade side of the shearing cutter to form a slit in the laminated long sheet fed on the receiving blade. This can be compensated for by simultaneously processing a plurality of long sheets.

[0017] Further, by providing separation means for guiding each sheet constituting the laminated long sheet formed in a mesh state in different directions and separating the sheets one by one, the spreading means can be used to separate the mesh state. The resulting laminated long sheets can be separated one by one to obtain a single leaf mesh sheet.

Further, by providing rolling means for rolling each of the separated mesh sheets from both the front and back surfaces and flattening them, a thinner mesh sheet can be formed.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention.
The embodiment described below is an example embodying the present invention, and does not limit the technical scope of the present invention.

The present embodiment is intended to be used as a current collector constituting a positive electrode plate or a negative electrode plate of a non-aqueous electrolyte battery, and a fine metal sheet is formed by laminating two metal sheets. In addition to forming a mesh structure, a plain portion where a mesh structure is not formed is provided at the center portion and both side portions, and this is separated for each sheet to produce a spread mesh sheet used as a current collector of a battery. Is what you do.

FIG. 1 is a schematic view showing a process of processing a laminated metal sheet B into an expanded mesh sheet.
As a laminated metal sheet B to be processed into a spread mesh sheet, two thin metal sheets are superimposed, rolled into a roll, and unwound from an end to be supplied to a processing position. The two metal sheets are placed on both sides between the two metal sheets so that there is no deviation due to the difference in circumferential length when wound in a coil shape, or waving or meandering when transporting to the processing position. It is formed in a state where the layers are engaged by the formed embossing or the like.

The laminated metal sheet B is guided by a conveyance guide (conveying means) 30 and fed to a slit forming section (slit forming means) 11. As shown in FIGS. 2A and 2B, the transport guide 30 regulates the widthwise movement of the laminated metal sheet B by rollers 38 arranged on both sides with an interval corresponding to the width of the laminated metal sheet B. In addition, as shown in FIG. 2B, the movement of the laminated metal sheet B in the thickness direction is regulated by the upper and lower guides 39 and 40 in which the groove 51 for reducing the contact resistance is formed. B is guided to a predetermined processing position of the slit forming section 11. One metal sheet of the laminated metal sheet B is 50 μm
Even in the case of the following thin foil shape, since the rigidity is maintained by being overlapped, there is no deformation even during this conveyance.

The slit forming section 11 is provided between an upper mold and a lower mold by arranging an upper mold and a lower mold, which are formed by laminating plate-like cutters described later, and driving them forward and backward in opposite directions. As shown in FIG. 3, the slits e and the bulging portions g are plastically worked on the laminated metal sheet B fed to the above. The upper die and the lower die provided in the slit forming portion 11 are such that the plate-shaped cutter is not disposed at a position corresponding to the center portion and both side portions in the width direction of the laminated metal sheet B, The slit e and the bulging portion g are not formed in the center portion and both side portions in the width direction of B. The central uncoated portion Nc and the uncoated portions N on both sides where the slit e and the bulging portion g are not formed.
s, in the notch forming part 13, as shown in FIG.
The groove-shaped uneven portion 19 is formed in the width direction of the laminated metal sheet B. The notch forming portion 13 is formed at the center uncoated portion N on the roller surface.
c and a male roller having a convex portion formed in the width direction of the roller at a position in contact with the uncoated portion Ns on both sides, and a female roller having a concave portion disposed opposite to each other. As shown in FIG. 7, the uneven portions 19 are formed in the central uncoated portion Nc and the uncoated portions Ns on both sides by arranging them so that the positions thereof coincide with each other and applying pressure between the rollers.

The laminated metal sheet B is stretched in the expanding portion 12 so as to expand the metal sheet B in the width direction, so that the bulging portion g extends in the width direction and the slit e
Since the slits e are opened, the slits e are connected in a staggered manner at the knots f so that the lamination mesh sheet C in which the rhombic openings are developed in a lattice shape is formed. By applying rolling by light pressure by the pre-rolling rollers 27 and 28 disposed opposite to each other in the spreading process, when the bulging portion g is stretched by spreading, the knot portion f is formed by the action of the spring back. The floating state can be suppressed and returned to a certain plane, and this is performed during the extension, so that the cutting of the knot portion f due to the extension can be prevented, and the aperture ratio and the uniformity of the lath can be improved. .

The stretched laminated mesh sheet C is lightly rolled in the provisional rolling section 14 to flatten the waving state caused by the stretching, thereby facilitating the main rolling in a subsequent step. The laminated mesh sheet C that has exited the temporary rolling section 14 is separated by being pulled out in a different direction for each sheet in a separating section (separating means) 16. The separated mesh sheets D are rolled by main rolling units (rolling means) 17 and 17, respectively. At the time of this rolling, the uncoated portions Nc and Ns have uneven portions 19
Is formed, the difference in elongation between the mesh portion and the mesh portion due to rolling is eliminated, and without causing deformation due to the difference in elongation, rolling is performed on average to form a spread mesh sheet E, and each is wound around a roll. Taken.

The slit forming section 11 in the above processing step
The configuration will be described below.

FIG. 4 partially shows an upper die 21 and a lower die 22 provided in the slit forming section 11, and a plurality of plate-like cutters 15 constituting a shearing cutter are overlapped at a predetermined interval. It is configured together. The plate-like cutter 15 has a blade 24 of a shearing cutter on both sides.
And the convex portions 23 are formed in a semicircular shape at a predetermined pitch. Further, a relief portion 2 in which the blade portion 24 is cut off in an oblique direction is provided in a linear portion while the convex portion 23 projects.
5 are formed so as to be alternately arranged on one surface and the other surface of the plate-shaped cutter 15. The plate-shaped cutter 15 formed in this way is superposed with an interval dimension substantially equal to the thickness dimension of the plate material, and the upper die 21 and the lower die 22 are formed. The upper mold 21 and the lower mold 22 are connected to the plate cutter 15.
Are disposed so as to be vertically opposed to each other at a position displaced by the thickness of the plate material in the direction of superimposition. By driving the upper die 21 and the lower die 22 forward and backward in the facing direction, the plate-shaped cutter 15 of the upper die 21 and the plate-shaped cutter 15 of the lower die 22 mesh with each other, and the lamination fed between the opposite ends. Metal sheet B
As shown in FIG. 3, a slit e and a bulging portion g are formed.

FIG. 5A is a plan view showing a state in which the upper mold 21 and the lower mold 22 are engaged with each other, and corresponding to this state, a slit is formed in the laminated metal sheet B fed to this position. FIG. 5 (b) shows the state after the operation. As shown in the figure, the slit e is formed at a position where the upper and lower blade portions 24 and 24 match, and the slit e is not formed at a position where the upper and lower relief portions 25 and 25 match, because the blade 24 is cut off. . Further, a portion cut by the blade portion 24 is provided between the slits where the blade portion 24 faces in the planar direction.
As a result, a bulged portion g which is alternately projected on the front and back of the laminated metal sheet B is formed. Further, since the slit e is not formed at the position where the upper and lower relief portions 25 coincide with each other, the slit e is formed intermittently and in a staggered manner, and the relief portion 25 is formed.
, That is, a knot portion f is formed between the intermittent slits e.

As described above, the slit forming section 11 drives the upper mold 21 and the lower mold 22 on which the plate-shaped cutters 15 are overlapped to move forward and backward between the opposing molds, and simultaneously forms a plurality of rows of slits e. The slit formation can be performed collectively. Further, the plate-shaped cutter 15 can be formed to have a small thickness as a cutter, and can perform fine slit processing. Such a plate-like cutter 15
In this case, it is possible to form a fine slit with a minimum thickness of 100 μm as a processing limit, and it is possible to manufacture a current collector having a fine lath structure indispensable for manufacturing a small and high-performance battery.

The laminated metal sheet B in which the slit e, the bulging part g, and the knot part f are formed as described above in the slit forming part 11 is expanded so that the width direction of the laminated metal sheet B in the expanding part 12 is enlarged. As shown in FIGS. 6 (a) and 6 (b), when the sheet is pulled, the slit e is opened, and the bulging portion g formed between the slits is expanded, and the slit e becomes a rhombic opening. The lath-like laminated mesh sheet C connected at the knot portion f is formed. Since the amount of extension at which the slit formation site is extended changes depending on the distance in the width direction, as shown in FIG. 6B, a long diagonal line surrounding the rhombic opening formed by opening the slit e is used. It extends so that the ratio between the angle LW and the short diagonal SW becomes approximately 2: 1.

The laminated mesh sheet C is sent out in a different direction for each of the two sheets superimposed in the separating section 16, and is rolled by the main rolling sections 17, 17. Flattening is performed so as to eliminate the extended minute unevenness. The main rolling section 17 presses the mesh sheet C between the rollers by a pair of pressing rollers having a flat surface, and the unevenness of the mesh forming section and the uncoated portion Nc,
The Ns notch 29 is flattened and rolled so that the entire surface has a uniform thickness. At this time, the elongation of the mesh forming portion is larger than the elongation of the uncoated portions Nc and Ns.
The irregularities 19 are formed on the rolled sheet 17 to prevent deformation of the spread mesh sheet E discharged from the main rolling section 17 at the same degree of elongation and breakage and deformation of the mesh. Accordingly, the shape dimensions and the number of the uneven portions 19 formed in the notch forming portion 13 are set so that the plain portions Nc and Ns coincide with the elongation of the mesh forming portion M during rolling, and based on this, A male roller and a female roller are formed.

Since the spread mesh sheet formed as described above is conveyed in a stacked state in which metal sheets are superimposed, even when processing an ultrathin metal sheet, deformation due to conveyance hardly occurs, and slit formation and slitting can be performed. Breakage is less likely to occur in the stretching process, and an extremely thin current collector required for manufacturing a miniaturized or thinned battery can be manufactured. Further, since a plurality of sheets are simultaneously processed, productivity is also improved. Furthermore, uncoated portions Nc and Ns are provided at the central portion and both side portions.
Is formed, so that it is strong enough to withstand the tension when transported to each processing step, and has a much higher tensile strength than when no solid part is formed, so it is necessary for small and thin batteries A thin spread mesh sheet E for producing a thin and thin current collector can be manufactured.

When the current collector is cut out from the spread mesh sheet E provided with the uncoated portions Nc and Ns, a high-performance battery can be manufactured by effectively utilizing the existence of the uncoated portions Nc and Ns. it can. That is, as shown in FIG. 8, the active material is applied to the current collector 35 by cutting out such that the lead connection portion 35 a of the current collector 35 is located in the central uncoated portion Nc of the spread mesh sheet E. The positive electrode or the negative electrode prepared as described above is laminated via a separator,
5a, when connecting to a lead for extracting an electrode, a lead connecting portion 35 having no opening due to a mesh structure.
Since it is joined by welding at a, a battery excellent in weldability and capable of extracting a large current can be formed.

Further, as shown in FIG.
When the relief portion 25 is formed by notching the blade portion 24 from the blade portion 24, as shown in the figure, the relief portion is formed by forming a corner cut portion 36 in which the corner of the blade portion 24 in contact with the relief portion 25 is cut in the direction of the relief portion 25. By forming 25, the lath strength can be improved. By providing the square cut portion 36, the width of the slit e formed by the blade portion 24 interrupted by the escape portion 25 is widened and the length of the slit e is reduced, so that the slit e is opened by spreading. Since both ends are not formed at an acute angle but are formed at a rounded obtuse angle as shown in FIG. 10, the width of the node f connecting the rhombic openings formed by the slits e increases, and the connection is made at an obtuse angle. Therefore, the strength against tension is increased.

The laths formed on the spread mesh sheet E are basically formed in a fixed size, but the laths are gradually reduced in the width direction, or the size of the laths is changed for each location. You can change it. For example, the width of the plate material of the plate-shaped cutter 15 constituting the upper mold 21 and the lower mold 22 is
By forming the metal sheet B so as to be thicker in the width direction, the width of the linear portion h of the lattice gradually increases in the width direction, and it is possible to improve the strength in both sides where a large force is applied at the time of expansion. it can. Also, by changing the dimensions of the convex portion 23, the blade portion 24, and the relief portion 25 in accordance with the change in the thickness of the plate-shaped cutter 15, the distance ratio between the longitudinal direction and the lateral direction of the mesh is made the same, It can also be formed so that the size of the lattice changes.

The slit forming section 11 in the method for manufacturing a spread mesh sheet described above may be formed by a rotary method as shown in FIG. In this rotary method, a disk-shaped cutter 1 in which convex portions 2 are formed at a predetermined pitch in a peripheral portion and relief portions 3 are alternately formed between the convex portions 2 is superposed at substantially the same interval as this thickness dimension. The two rolls 10, 10 are arranged opposite to each other with the above-mentioned thickness dimension shifted, the respective rolls 10, 10 are driven to rotate, and the laminated metal sheet B is fed between the opposed rolls, thereby forming a slit. . In this rotary method, slits are formed continuously, so that the processing speed is high and productivity is improved. However, since the thickness of the disk-shaped cutter 1 is limited, fine slits are formed by the reciprocating method described above. Lower than the ones.

For slitting a laminated metal sheet, a reciprocating method as shown in FIG. 12 may be employed. In this method, as shown in FIG.
The slit i is machined while forming the bulging portion k by the pair of plate-shaped cutters 41 and 42. As shown in FIG. 12B, slits i are formed one by one in the width direction of the long sheet 43, and the slits i are expanded in the long direction to develop the slits i and processed into a mesh sheet. In this method, since the slits are formed one by one, the processing speed is reduced and the productivity is reduced, but fine slits can be formed.

In the production of the above-described spread mesh sheet, an example in which two metal sheets are overlapped as the laminated metal sheet B has been described. However, three or more metal sheets can be overlapped. Further, as shown in FIG. 13, a wide metal sheet G is folded in two from a folding line T on the center line in the width direction to form a two-folded laminated metal sheet H. Can be fed to the slit forming section 11 and processed into a spread mesh sheet in the same manner. Thus, the wide metal sheet G is
By processing into a folded metal sheet H, the width of each processing step can be reduced, and the production equipment can be reduced in size. Can be manufactured with a small facility.

[0039]

According to the present invention as described above, according to the present invention, an elongated mesh sheet is formed by slitting a laminated elongate sheet obtained by laminating a plurality of sheets, and rolling the mesh sheet having the slit extended. Since it is manufactured, it is easy to transport ultra-thin long sheets to the processing position, and breakage during slit formation is unlikely to occur. Therefore, if a plurality of laminated sheets are separated one by one, an ultra-thin spread mesh Sheets can be manufactured. Therefore, it becomes possible to manufacture a spread mesh sheet used for an ultra-thin current collector required for a battery that has been reduced in size and thickness, and productivity is improved because a plurality of sheets are simultaneously processed. In addition, if a wide metal sheet is folded in two and processed in the same manner as a laminated metal sheet, and then unfolded after processing, a wide spread mesh sheet can be manufactured with small equipment.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a method for manufacturing a spread mesh sheet according to an embodiment of the present invention.

FIG. 2A is a perspective view illustrating a configuration of a transport guide.
(B) is sectional drawing.

FIG. 3 is a partial perspective view of a metal sheet in a state where a slit is formed by a slit forming unit.

FIG. 4 is a perspective view showing a configuration of a plate-shaped cutter.

5A is a plan view showing a state in which an upper mold and a lower mold are engaged with each other, and FIG. 5B is a plan view showing the formation of a formed slit.

FIG. 6 is an explanatory view of splaying in which the slit state of (a) is processed into a mesh structure of (b) by spreading.

FIG. 7A is a plan view and FIG. 7B is a side view showing the formation of an uneven portion on a plain portion.

FIG. 8 is a plan view illustrating a method for cutting out a current collector using a solid portion.

FIG. 9 is a perspective view showing a modification of the plate-shaped cutter.

FIG. 10 is a plan view showing a mesh structure formed by the cutter.

FIG. 11 is a side view showing a configuration of slit formation by a rotary method.

FIG. 12 (a) of a reciprocating method using a pair of cutters.
FIG. 3 is a perspective view showing a slit forming structure, and FIG.

FIG. 13 is an image diagram showing a method of folding a wide sheet into two to form a laminated metal sheet.

14 (a) is a plan view and FIG. 14 (b) is a side view for explaining slit formation.

FIG. 15 is a plan view illustrating a state of slit formation and extension.

[Explanation of symbols]

 Reference Signs List 11 slit forming part 12 expanding part 13 notch forming part 16 separating part 17 main rolling part 19 uneven part 21 upper die 22 lower die 23 convex part 24 blade part 25 relief part e slit f knot part g bulging part h linear part B, H Laminated metal sheet C Laminated mesh sheet D Mesh sheet E Expanded mesh sheet G Wide metal sheet Nc, Ns Plain part M Mesh forming part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Saburo Nakatsuka 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F-term (reference) 5H017 BB07 BB19 CC05 HH05

Claims (13)

[Claims] 1. A laminated long sheet in which a plurality of long sheets are superimposed is fed to a slit forming section to form a plurality of slits in the laminated long sheet in an intermittent and staggered manner. A method for producing a spread mesh sheet, wherein a slit is developed by pulling a laminated elongate sheet in a direction perpendicular to the slit direction so that a slit forming portion is in a mesh state. 2. The method for manufacturing a spread mesh sheet according to claim 1, wherein a portion where no slit is formed is provided at a predetermined portion of the laminated long sheet to manufacture the spread mesh sheet. 3. The method for producing a spread mesh sheet according to claim 1, wherein the spread laminated long sheet is flattened by rolling. 4. By pulling out the spread laminated long sheets in different directions for each of the laminated sheets,
4. Extraction as an expanded mesh sheet for each sheet.
The method for producing the spread mesh sheet according to any one of the preceding claims. 5. The method for producing a spread mesh sheet according to claim 1, wherein the spread laminated long sheet is separated one by one and then rolled. 6. The method for producing a spread mesh sheet according to claim 1, wherein the laminated long sheet is constituted by laminating a plurality of long sheets in a plurality of layers. 7. The spread mesh sheet according to any one of claims 1 to 5, wherein the laminated long sheet is formed by folding the long sheet into a processing width in the width direction and overlapping the plurality of layers. Production method. 8. A conveying means for feeding a laminated long sheet in which a plurality of long sheets are superimposed in a longitudinal direction thereof, and a plurality of slits formed in the laminated long sheet fed by the conveying means. Forming slits intermittently and in a staggered manner, and stretching the slit-formed laminated long sheet in a direction perpendicular to the slit direction to develop the slits and process the slit-formed portions into a mesh state. And a means for producing a spread mesh sheet. 9. A slit forming means for forming both end sides of a plate material having a plurality of convex portions formed at a predetermined pitch on a blade portion of a shearing cutter, and cutting the blade portions between the convex portions alternately left and right. An upper mold and a lower mold are formed by laminating a plurality of plate-shaped cutters at substantially the same interval as the thickness of the plate-shaped cutter, and the two molds are displaced in the overlapping direction at the thickness. 9. The method according to claim 8, wherein the upper die and / or the lower die are driven to advance and retreat in the opposing direction to form slits in the laminated long sheet fed between the opposing dies. Manufacturing equipment for rolled mesh sheets. 10. A slit forming means for forming both peripheral surfaces of a disk having a plurality of convex portions formed at a predetermined pitch on a blade portion of a shearing cutter, and cutting the blade portions between the convex portions alternately left and right to form a circle. A plate-shaped cutter is formed, an upper mold and a lower mold are formed by stacking a plurality of the disc-shaped cutters at substantially the same interval as the thickness dimension thereof, and the two molds are overlapped in the thickness direction. 9. The method according to claim 8, wherein the upper and lower dies are rotationally driven so as to form slits in the laminated long sheet fed between the upper and lower dies. Manufacturing equipment for rolled mesh sheets. 11. A slit forming means, wherein a slit forming means forms an edge of a plate material having a plurality of convex portions formed at a predetermined pitch on a blade portion of a shearing cutter, and cuts a blade portion between the convex portions to form a slit forming cutter. 9. The spread mesh according to claim 8, wherein the slit forming cutter is driven to advance and retreat toward the receiving blade side of the shearing cutter to form a slit in the laminated long sheet fed on the receiving blade. Sheet manufacturing equipment. 12. A sheet separating apparatus according to claim 8, further comprising: a separating unit that guides each sheet constituting the laminated long sheet formed in a mesh state in a different direction and separates each sheet. An apparatus for manufacturing a spread mesh sheet according to claim 1. 13. The production of the spread mesh sheet according to any one of claims 8 to 12, further comprising a rolling means for rolling the separated mesh sheets from both front and back surfaces to flatten the separated mesh sheets. apparatus.