JP2003225720A - Device and method for forming lattice of electrode plate stock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device and a method for forming a lattice of an electrode plate stock capable of improving the productivity of a strip-like member having a lattice part, and preventing generation of any torsion of frame bones of the lattice part or generation of cracks in an end part of a slit. <P>SOLUTION: In the device for forming the lattice of the electrode plate stock, a front projection 45, a center projection 46 and a rear projection 47 to hold the electrode plate stock 40 when forming the slit 43 are provided on a side surface 23 with the slit 43 formed in the electrode plate stock 40 which is a left fixed die 22 second from the left upper stream fixed die 22 out of a plurality of fixed dies 22 in right and left fixed die units. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grid forming device for a plate material and a grid forming method for a plate material, and more particularly to a plate material while transporting a long strip-shaped plate material from an upstream side to a downstream side. The present invention relates to a grid forming device for forming a grid portion on a material and a grid forming method for an electrode plate material.

[0002]

2. Description of the Related Art A plurality of electrode plates are installed inside a lead-acid battery. The electrode plates have a grid portion inside a rectangular frame body, and the grid portion is coated with an active material paste. There is. Figure
As shown in FIG. 10, when manufacturing the electrode plate, first, while conveying the strip-shaped material made of lead in the longitudinal direction, the grid portions 101 are formed on both sides of the strip-shaped material 100, and the active material is formed on each of the grid portions 101. Paste 10
Supply 2.

After the active material paste 102 is supplied to the lattice portion 101, the surface 102A of the active material paste 102 is flattened by the three pressing rollers 103 and the three finishing rollers 1 are used.
At 03, the back surface 102B of the active material paste 102 is flattened. As a result, the active material paste 102 is sandwiched in the thickness direction by the three pressing rollers 103 and the three finishing rollers 103, and then the band-shaped material 100 provided with the active material paste 102 is punched out to manufacture an electrode plate.

By the way, the lead strip 100 provided with the grid portion 101 is manufactured by the grid forming apparatus 110 of the electrode plate material shown in FIG. The plate material grid forming device 110 is a reciprocating type expanded grid manufacturing device to which a multi-die is applied, and is arranged along a transport path 112 that transports a long strip-shaped polar plate material 111 to be the strip-shaped material 100 on the upstream side. A plurality of fixed dies 113 are provided on the left and right sides from the downstream side to the downstream side, respectively, and the fixed dies 113 on the downstream side are offset in a direction orthogonal to the conveyance direction, and a plurality of movable dies (above the fixed dies 113) are provided. (Not shown) is provided so that it can be raised and lowered.

The strip-shaped material 1 is formed by the grid forming device 110 of this electrode plate material.
When manufacturing 00, first, the electrode plate material 111 is set on the transport path 112, and the movable die is lowered to form slits on both sides of the electrode plate material 111 by the movable die and the fixed die 113. , Widen these slits. Next, after widening the slit, the movable die is raised to convey the electrode plate material 111 by a predetermined amount. In this state, the movable die is lowered again to form new slits along the slits by the movable die and the fixed die 113, and these new slits are widened.

Thereafter, the above steps are sequentially repeated to make the electrode plate material.
The grid 114 is formed on both sides of the 111, and the fixed die 113 is formed.
And a strip-shaped material having the lattice portion 101 shown in FIG. 12 by flatly pressing the lattices 114 formed on both sides of the electrode plate material 111 with a press roller (not shown) provided on the downstream side of the movable die. Get 100. Then, the band-shaped material 100 is cut as shown by a chain double-dashed line in FIG. 12, thereby obtaining the lattice body 105 shown in FIG.

The lattice body 105 is provided with an upper rib 107 having an electric extraction portion 106 sandwiching the lattice portion 101 and a lower rib 108. The lattice part 101 is a frame bone that constitutes each lattice 114.
114A has a substantially rhombic shape (see FIG. 12).

[0008]

In order to increase the productivity of lead acid batteries, it is attempted to increase the production efficiency of the strip material 100 provided with the grid portion 101. There are two methods of increasing the production efficiency of the strip material 100, a method of using a rotary expander and a method of forming a reciprocal expander into multiple dies. Further, the strip-shaped material 1 including the lattice portion 101
When manufacturing 00, the grid portion 101 is coated with the active material paste 102 in the next step. At that time, the lower ribs 108 are formed.
If the surplus paste attached to the battery is left as it is, it will lead to an internal short circuit of the battery. Therefore, in order to easily scrape off the surplus paste, it is better to make the lower rib 108 as straight as possible beforehand so that there is no dent.

In the rotary expanding lattice manufacturing apparatus, it is possible to form the lower ribs 108 straight. However, when the rotary-type expanded lattice manufacturing apparatus is used, when the slits are formed in the electrode plate material 111, twisting occurs in each lattice 114, so that the connecting portion of the lattice 114, that is, the node portion 114A where each lattice 114 intersects. Cracks are likely to occur, which adversely affects battery life.

By the way, the multi-direction reciprocating expander has a node portion 114 like a rotary expander.
There is no negative factor that cracks occur in A. However, the node portion 114A formed in the valley of the die is pulled only on one side of the node portion 114A in the case of a single die, whereas in the case of a multi-die, the node portion 114A is pulled.
Since it is pulled from both sides of A, when trying to pull the cross-sectional area of the lattice 114, which was successful with a single die, the node portion 114A is sheared and broken. As a result, the lower ribs 108 cannot be formed straight, and only a meandering shape that is difficult to remove the excess paste is formed. As a countermeasure against this, for example, it has been proposed to wrap a resin product around the lower rib 108, but the manufacturing cost naturally increases.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to improve the productivity of the lattice body while ensuring the conventional product quality, so that the frame bone of the lattice portion is not twisted. An object of the present invention is to provide a grid forming device for a polar plate material and a grid forming method for a polar plate material capable of forming a grid body having a lower rib without causing any cracks or cracks at the ends of the slits.

[0012]

In order to achieve the above-mentioned object, a grid forming device for an electrode plate material according to the present invention has a long strip shape which is an electrode plate of a lead storage battery as described in claim 1. While a plurality of fixed dies are arranged from the upstream side to the downstream side along the conveyance path that conveys the electrode plate material, the fixed dies on the downstream side are offset in a direction orthogonal to the conveyance direction. By lowering a plurality of movable dies provided to be able to move up and down above the fixed die, a slit is formed in the electrode plate material by the movable die and the fixed die, and these slits are widened, After the slit is widened, the movable die is raised to convey the electrode plate material by a certain amount, and in this state, the movable die is lowered again so that the movable die and the fixed die follow the slit. Forming a new slit, expanding these new slits, and then repeating the above steps to form a grid on the electrode plate material. In the second fixed die from at least the most upstream fixed die of the die, on the side surface forming the slit in the electrode plate material, when forming the slit, for holding a predetermined portion of the electrode plate material It is characterized in that a protrusion is provided.

In the apparatus for forming a grid of the electrode plate material configured as described above, the electrode plate material is held at a predetermined position when a slit is formed on the side surface of the second stationary die from the most upstream stationary die. Providing a protrusion. Thus, when a slit having a large cross-sectional area is widened by the multi-die, the slit can be smoothly formed without holding the predetermined portion of the electrode plate material with the projection and breaking the node portion, and the slit can be widened without difficulty.

Accordingly, when the formed slit is widened to manufacture the lattice part, the lower side frame bone (main bone) of the lattice part can be formed substantially straight to have no dent. Therefore, it is possible to omit a work step of covering the dent by masking the lower side frame bone with tape, which has been conventionally required.

Further, since it is not necessary to use the rotary type expanded lattice manufacturing apparatus, it is possible to avoid the generation of twist in the frame bone of the lattice portion, which is a drawback of the rotary type expanded lattice manufacturing apparatus.

According to a second aspect of the present invention, there is provided a grid forming device for a plate material, wherein the plurality of fixed dies and the plurality of movable dies are provided in parallel in two sets. Characterize. By providing two sets of a plurality of fixed dies and a plurality of movable dies in parallel, it is possible to simultaneously form a pair of slits and widen these slits in one shot cycle of the movable dies.

Further, in the grid forming device for the electrode plate material according to the present invention, as described in claim 3, the projections are arranged so as to be located at the node portions between the slits. To do.

By arranging the protrusions so as to be located between the slits, the ends of the slits can be securely held by the protrusions when the slits are formed, so that the slits can be formed smoothly and the formed slits are impossible. Can be expanded without.

Further, in the grid forming device of the electrode plate material according to the present invention, as described in claim 4, the protrusion is inclined so that the upper end thereof has a downward slope in a direction away from the fixed die. It is characterized by being.

When the movable die is lowered to form the slits in the electrode plate material by inclining the upper ends of the projections in a downward slope toward the direction away from the fixed die, the electrode plate material is Deform to the top. Here, when the movable die rises, the deformation of the electrode plate material is restored to some extent and tries to return to the original position. Therefore, since the electrode plate material can be separated from the protrusion, the electrode plate material can be smoothly conveyed without coming into contact with the protrusion when the electrode plate material is conveyed to the downstream side.

According to a fifth aspect of the present invention, in the grid forming apparatus for the electrode plate material, the upper edge of the protrusion is lowered by a certain distance from the upper edge of the fixed die. Characterize.

By lowering the upper end of the protrusion from the upper end of the fixed die by a certain distance, when the movable die is lowered to form the slit in the electrode plate material, the electrode plate material is deformed to the upper end of the protrusion. Here, when the movable die rises, the deformation of the electrode plate material is restored to some extent and tries to return to the original position. Therefore, since the electrode plate material can be separated from the protrusion, the electrode plate material can be smoothly conveyed without coming into contact with the protrusion when the electrode plate material is conveyed to the downstream side.

Further, in the grid forming device of the electrode plate material according to the present invention, as described in claim 6, the projection has the corners at the upper ends thereof curved.

By forming the corners of the upper ends of the protrusions to be curved, when the movable die is lowered to form the slits in the electrode plate material, the electrode plate material is deformed up to the upper ends of the protrusions. Here, since the deformation of the electrode plate material is an elastic deformation, when the movable die rises, the electrode plate material is deformed and tries to return to its original position. Therefore, since the electrode plate material can be separated from the protrusion, the electrode plate material can be smoothly conveyed without coming into contact with the protrusion when the electrode plate material is conveyed to the downstream side.

Further, in the grid forming device for the electrode plate material according to the present invention, as described in claim 7, the front surface of the protrusion on the upstream side is tapered toward the downstream side. It is characterized by

By forming the front surface on the upstream side of the protrusion in a taper shape toward the downstream side, the movable die can be lowered to form slits in the electrode plate material, and then the electrode plate material can be smoothly conveyed to the downstream side. .

Further, in the lattice forming device of the electrode plate material according to the present invention, as described in claim 8, the protrusion has the upstream corner thereof curved. .

By forming the upstream corner of the protrusion into a curved shape, the movable die can be lowered to form slits in the electrode plate material, and then the electrode plate material can be smoothly conveyed to the downstream side.

On the other hand, in the method for forming a grid of an electrode plate material according to the present invention, as described in claim 9, a long strip-shaped electrode plate material serving as an electrode plate of a lead storage battery is carried along a transfer path. While multiple fixed dies are arranged from the upstream side to the downstream side,
Using the grid forming device of the electrode plate material in which the fixed dies on the downstream side are offset in the direction orthogonal to the transport direction, and the plurality of the movable dies are vertically movable above the fixed dies. A method of forming a grid of a polar plate material, wherein a grid portion is formed on the polar plate material, wherein a slit is formed in the polar plate material by the movable die and the fixed die by lowering the plurality of movable dies. Together with expanding the slits, after expanding the slits, the movable die is raised to convey a certain amount of the electrode plate material, and in this state, the movable die is lowered again to move the movable die to the movable die. Forming new slits along the slits with the fixed die, widening these new slits, and then repeating the above steps to form a grid on the electrode plate material. In the grid forming method of the electrode plate material to be formed, in at least the second fixed die from the most upstream fixed die of the plurality of fixed die, by providing a projection on the side surface forming the slit in the electrode plate material When the slit is formed by the movable die and the fixed die, a node portion between a plurality of slits formed by the most upstream fixed die in the electrode plate material is held by the protrusion. .

In the grid forming method of the electrode plate material configured as described above, a protrusion for holding the electrode plate material when forming the slit is provided on the side surface of the second stationary die from the most upstream stationary die. As a result, the electrode plate material can be held by the protrusions when a wire having a large cross-sectional area is spread by the multi-die. Thereby, the slit can be smoothly formed without destroying the node portion, and the formed slit can be reasonably expanded, so that the frame bone of the lattice portion is twisted or a crack is generated at the end portion of the slit. It can be prevented from occurring.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. In each embodiment described below, the members already described with reference to FIGS. 1 to 5 are given the same or corresponding reference numerals in the drawings to simplify or omit the description.

As shown in FIG. 1, the lead-acid battery 10 has a case 11
A plurality of electrode plates 12 are arranged inside, terminals 13 and 14 connected to these electrode plates 12 are projected from a lid 15, and a liquid port 16 of the lid 15 is closed by a liquid port plug 17. This electrode plate 12 is provided with a lattice portion inside a rectangular frame body, and the active material paste is applied to the lattice portion. Hereinafter, the grid forming device 20 for a plate material for forming a grid portion on the plate material for the plate 12 will be described in detail.

As shown in FIG. 2, in the electrode material grid forming apparatus 20 according to the first embodiment of the present invention, a long strip-shaped electrode material 40 to be the electrode plate 12 of the lead storage battery 10 is indicated by an arrow. Left and right fixed die units in parallel along the transport path 42
21 and 25 are provided, and left and right movable die units 31 and 35 are provided above the left and right fixed die units 21 and 25 so as to be vertically movable.

In the left fixed die unit 21, a plurality of fixed dies 22 are arranged from the upstream side P1 to the downstream side P2 of the conveyance path 42, and the fixed dies 22 on the downstream side are separated by a dimension δ in a direction orthogonal to the conveyance direction. Offset inward (see also Figure 6). Since the right fixed die unit 26 is a unit which is configured symmetrically with the left fixed die unit 21, the same reference numerals are given and the description thereof is omitted.

The left movable die unit 31 has a plurality of movable dies 32 arranged from the upstream side P1 to the downstream side P2 of the conveyance path 42, and the plurality of movable dies 32 are integrally lowered to move the movable dies.
It is configured such that the slit 43 can be formed in the electrode plate material 40 by the 32 and the fixed die 22. The right movable die unit 35
Is a unit that is configured symmetrically with the left movable die unit 31, and is therefore assigned the same reference numeral and will not be described.

According to the grid forming device 20 of the electrode plate material, the left and right movable die units 31 and 35, which are provided above and below the left and right fixed die units 21 and 25, are lowered to move the respective movable die units. The slits 43 are formed in the electrode plate material 40 by the 32, 36 and the fixed dies 22, 26, respectively, and the slits 43 are expanded. After the slits 43 are expanded, the left and right movable die units 31, 35 are raised. The electrode plate material 40 is conveyed by a certain amount, and in this state, the left and right movable die units 31, 35
Is moved down again, and a new slit 43 is formed along the slit 43 by the movable dies 32 and 36 and the fixed dies 22 and 26.
And forming these new slits 43, and then repeating the above steps in sequence, the electrode plate material
You can form a grid of 40.

Here, the fixed die units 21, 25 and 3
1, 35 have a plurality of blades integrated to form a plurality of slits (here, two places) at one time. Thus, in one shot cycle, a plurality of slits 43 can be simultaneously formed on the left and right sides of the electrode plate material 40, these slits 43 can be expanded, and a grid can be formed from the expanded slits 43.
In this way, a plurality of grids can be simultaneously formed on each of the left and right sides of the electrode plate material 40 in one shot cycle, so that productivity can be improved.

As shown in FIG. 3, the grid forming device 20 for the electrode plate material includes the left and right fixed die units 21, 25 (only the fixed die unit 21 is shown), and the leftmost one of the plurality of fixed dies 22. Second fixed die 22 from upstream fixed die 22
(Hereinafter referred to as the "second fixed die"), and the electrode plate material
A front projection 45, a central projection 46 and a rear projection 47 for holding the electrode plate material 40 when the slit 43 is formed are provided on the side surface 23 where the slit 43 is formed in 40 (shown in FIG. 2).

The upper end 45A of the front projection 45 is formed in a rectangular shape, the upper end 45A is arranged flush with the upper surface 24 of the left fixed die 22, and the height is set to H to form a prismatic shape. ing. Further, like the front protrusion 45, the central protrusion 46 has an upper end 46A formed in a rectangular shape, and the upper end 46A has a left fixed die.
It is arranged flush with the upper surface 24 of 22 and is formed into a prismatic shape by setting the height to H. In addition, the rear protrusion 47
Also, like the front protrusion 45, the upper end 47A is formed in a rectangular shape,
The upper end 47A is arranged flush with the upper surface 24 of the left fixed die 22, and the height is set to H to form a prismatic shape.

The movable die 32 has a blade portion at the lower end, a tapered surface 33A formed at the front end, and a substantially V-shaped cut 33B at the center.
Is formed and a tapered surface 33C is formed at the rear end, whereby the front movable die portion 32A and the rear movable die portion 32B are divided. The front end tapered surface 33A is located above the front protrusion 45,
The notch 33B at the center is located above the central projection 46, and the tapered surface 33C at the rear end is located above the rear projection 47.
As a result, the movable die portion 32A has the front protrusion 45 and the central protrusion 46.
The rear movable die section 32B is located above the
It is located above between 46 and the rear protrusion 47.

That is, the front protrusion 45, the central protrusion 46, and the rear protrusion 47 are arranged at positions forming a node portion between a pair of adjacent slits 43 (see also FIG. 5).
In this way, by arranging the front protrusion 45, the central protrusion 46, and the rear protrusion 47 in the portion that forms the node portion between the slits 43, the end portion of the slit 43 when forming the slit 43, that is, the node portion Protrusion 45, central protrusion 46, and rear protrusion 47
Since it can be securely held with, even when forming a slit 43 with a large cross-sectional area with a multi-die, the slit 43 can be formed smoothly without breaking the node part, and the formed slit
43 can be spread easily.

Next, the method of forming the grid of the electrode plate material will be described with reference to FIGS. First, as shown in FIG. 4, the electrode plate material 40 is conveyed in the direction of the arrow and rests in a state of being placed on the most upstream fixed die 22 of the fixed die unit 31.
Next, the plurality of movable dies 32 (not shown) of the left movable die unit 31 are lowered. This allows the uppermost stream side movable die 32
And the uppermost stream side fixed die 22 press the electrode plate material 40 so that two slits 43 are formed on the front end side of the electrode plate material 40.
These slits 43, 43 are widened by forming 43 and pressing down the part 40A of the electrode plate material 40.

Next, after expanding these slits 43, 43, the movable die unit 31 (not shown) is raised. Then, as shown in FIG. 5, the electrode plate material 40 is conveyed by a certain amount in the direction of the arrow, and the electrode plate material 40 stands still with the tip side thereof placed on the second fixed die 22. In this state, the movable die 32 (shown in phantom in FIG. 6) is lowered again to move the movable die 32 and the fixed die.
22 and new slits 43 and 43 along slits 43 and 43
By forming the groove and pressing down the part 40B of the electrode plate material 40, new slits 43, 43 are expanded. In this way, by expanding these new slits 43, 43, the grid is formed in the parts 40B and 40A (shown in FIG. 4).
44 is formed.

Here, the side surface 23 of the second fixed die 22 is provided with a front projection 45, a central projection 46 and a rear projection 47 for holding the electrode plate material 40 when forming the slit 43.
Therefore, even if the slit 43 having a large cross-sectional area is formed by the multi-die, the front projection 45, the central projection 46 and the rear projection 47 of the second fixed die 22 hold the electrode plate material 40 and the slit is formed without breaking the node portion. The slit 43 can be smoothly formed and the slit 43 can be expanded without difficulty. Therefore, it is possible to prevent the frame bone of the lattice portion from being twisted and the slit 43 from being cracked.

Thereafter, by repeating the above steps in sequence, the left and right movable units 31 and 35 (see FIG. 2) and the left and right fixed units 21 and 25 have the grids 44 downward on the left and right side portions of the electrode plate material 40, respectively. Is formed so as to extend stepwise. In this way, the grid 44 extending downward in a step-like manner is provided on a press roller (not shown) provided on the downstream side of the left and right movable units 31, 35 (see FIG. 2) and the left and right fixed units 21, 25. By passing through the material 40, the grating 44 extending downward in a stepwise manner is flattened to obtain an electrode plate material 40 having grating portions on the left and right. From this electrode plate material 40,
An electrode plate 12 of the lead storage battery 10 shown in is formed.

Next, second to sixth embodiments will be described with reference to FIGS. The protrusion 50 of the second embodiment shown in FIG. 8A is inclined so that its upper end 50A has a downward slope in a direction away from the fixed die 22.

By inclining the upper end 50A of the protrusion 50 toward the direction away from the fixed die 22 so as to have a downward slope,
When the movable die 32 is lowered to form the slits 43 in the electrode plate material 40, the electrode plate material 40 is deformed to the upper end 50A of the protrusion 50. Here, since the deformation of the electrode plate material 40 is an elastic deformation, when the movable die 32 rises, the deformation of the electrode plate material 40 restores and tries to return to the original position. Therefore, since the electrode plate material 40 can be separated from the upper end 50A of the protrusion 50, the electrode plate material 40 can be smoothly conveyed without coming into contact with the protrusion 50 when the electrode plate material 40 is conveyed to the downstream side.

The upper end 52A of the protrusion 52 of the third embodiment shown in FIG. 8B is lowered from the upper end 24 of the fixed die 22 by a certain distance. In this way, by lowering the upper end 52A of the protrusion 52 from the upper end 52A of the fixed die 22 by a certain distance, when the movable die 32 is lowered to form the slit 43 in the electrode plate material 40, the electrode plate material 40 is projected. Deform to the upper end 52A of 52.

Here, as in the second embodiment, the movable die is
When 32 rises, the deformation of the electrode plate material 40 is restored to some extent and tries to return to its original position. Therefore, since the electrode plate material 40 can be separated from the upper ends 52A of the protrusions 52, the electrode plate material 40 can be smoothly conveyed without contacting the protrusions 52 when the electrode plate material 40 is conveyed to the downstream side.

Further, the protrusion 54 of the fourth embodiment shown in FIG. 8C has a corner 54A at the upper end thereof formed in a curved shape.
When the movable die 32 is lowered to form the slits 43 in the electrode plate material 40 by forming the corners 54A at the upper ends of the protrusions 54 in a curved shape, the electrode plate material 40 causes the electrode plate material 40 to have corners 54A at the upper ends of the protrusions 54. Transforms to.

Here, as in the second embodiment, the movable die is
When 32 rises, the deformation of the electrode plate material 40 is restored to some extent and tries to return to its original position. For this reason, the electrode plate material 40 can be separated from the corner portion 54A at the upper end of the protrusion 54.
When the sheet is conveyed to the downstream side, the electrode plate material 40 can be smoothly conveyed without coming into contact with the projection 50.

On the other hand, FIG. 9A shows the protrusion 56 of the fifth embodiment.
The front surface 56A on the upstream side is formed in a taper shape toward the downstream side. By forming the front surface 56A on the upstream side of the projection 56 toward the downstream side in a tapered shape, the movable die 32 is lowered to form the slit 43 in the electrode plate material 40, and then the electrode plate material 40 is formed.
Can be smoothly transported to the downstream side.

Further, FIG. 9B shows the protrusion 58 of the sixth embodiment.
Has an upstream corner portion 58A formed in a curved shape.
By forming the upstream corner portion 58A of the protrusion 58 into a curved shape,
After the movable die 32 is lowered to form the slits 43 in the electrode plate material 40, the electrode plate material 40 can be smoothly conveyed to the downstream side.

In the embodiment, the fixed die unit 2
By equipping two sets of 1 and 25 in parallel on the left and right and by setting two sets of movable die units 31 and 35 in parallel on the left and right, a pair of slits 43 can be simultaneously formed on the left and right sides of the electrode plate material 40 in one shot cycle. However, the present invention is not limited to this, and it is also possible to provide one set of fixed die units and one set of movable die units.

Further, in the above-described first embodiment, the front protrusion 45 is provided on the second fixed die (second fixed die) 22, 26 from the uppermost stream fixed die 22, 26 of the plurality of fixed dies 22, 26. Although the example in which the central protrusion 46 and the rear protrusion 47 are provided has been described, the present invention is not limited to this, and the other fixed dies 22 and 26 may be provided with the front protrusion 45, the central protrusion 46, and the rear protrusion 47.

Further, in the above-described first embodiment, an example in which the fixed dies 22 and 26 are provided with the three protrusions of the front protrusion 45, the central protrusion 46 and the rear protrusion 47 has been described, but the present invention is not limited to this. The fixed dies 22, 26 may be provided with the central protrusion 46 only, or may be provided with only the front protrusion 45 and the rear protrusion 47.

Further, the present invention is not limited to the above-mentioned respective embodiments, and appropriate modifications and improvements can be made. The material, shape, size, form, number, location, thickness, etc. of the projections, central projections, rear projections, etc. are arbitrary and are not limited as long as the present invention can be achieved.

[0058]

As described above, according to the present invention, as described in claim 1, when the slit is formed on the side surface of the second stationary die from the most upstream stationary die, the electrode plate material is formed. Is provided with a protrusion for holding. As a result, when engraving a slit with a large cross-sectional area with a multi-die, the node portion formed on the electrode plate material is held by the protrusion, the slit is formed smoothly without breaking the node portion, and this slit can be expanded without difficulty. be able to.

Therefore, when the slits are formed and the formed slits are widened to manufacture the lattice part, the lower side frame bones (parent bones) of the lattice part can be formed substantially straight to have no dents. Therefore, it is possible to omit the work step of covering the dents by masking the lower-side frame bone with tape, which has been conventionally required, and thus it is possible to manufacture the strip-shaped material provided with the lattice portion without trouble.

In addition, since the electrode plate material is held by the projections to smoothly form the slits, the slits can be reasonably widened, so that the ends of the slits, that is, the node portions are not destroyed. Therefore, by providing the protrusions on the side surface of the fixed die, the grid portion can be efficiently formed on the electrode plate material.

Furthermore, since it is not necessary to use the rotary type expanded lattice manufacturing apparatus, it is possible to avoid the twist of the lattice portion in the frame bone, which is a drawback of the rotary type expanded lattice manufacturing apparatus.

Further, as described in claim 2, by providing two sets of a plurality of fixed dies and a plurality of movable dies in parallel, a pair of slits are simultaneously formed in one shot cycle of the movable dies. You can widen the slit. Thereby, the productivity of the electrode plate material provided with the lattice portion can be further improved.

Further, as described in claim 3, the protrusion is arranged so as to be located between the slits.
Accordingly, when forming the slit, the end portion of the slit can be reliably held by the protrusion, so that the slit can be formed smoothly and the formed slit can be expanded without difficulty. Accordingly, it is possible to prevent the frame bone of the lattice portion from being twisted and the slit end portion from being cracked.

Further, as described in claim 4, the upper ends of the projections are inclined so as to be inclined downward in the direction away from the fixed die. Thereby, when the movable die is lowered to form the slits in the electrode plate material, the electrode plate material is deformed to the upper end of the protrusion. Here, when the movable die rises,
The deformation of the electrode plate material restores to some extent and tries to return to its original position. Therefore, the electrode plate material can be separated from the protrusions, so that the electrode plate material can be smoothly conveyed without coming into contact with the protrusions when the electrode plate material is conveyed to the downstream side, further improving productivity. Will be possible.

Then, as described in claim 5, the upper end of the protrusion is lowered from the upper end of the fixed die by a predetermined distance. Thereby, when the movable die is lowered to form the slits in the electrode plate material, the electrode plate material is deformed to the upper end of the protrusion. Here, when the movable die rises, the deformation of the electrode plate material is restored to some extent and tries to return to the original position. Therefore, the electrode plate material can be separated from the protrusions, so that the electrode plate material can be smoothly conveyed without coming into contact with the protrusions when the electrode plate material is conveyed to the downstream side, further improving productivity. Will be possible.

Further, as described in claim 6, the corners at the upper ends of the protrusions are formed to be curved. Thereby, when the movable die is lowered to form the slits in the electrode plate material, the electrode plate material is deformed to the upper end of the protrusion. Here, when the movable die rises, the deformation of the electrode plate material is restored to some extent and tries to return to the original position. Therefore, the electrode plate material can be separated from the protrusions, so that the electrode plate material can be smoothly conveyed without coming into contact with the protrusions when the electrode plate material is conveyed to the downstream side, further improving productivity. Will be possible.

Further, as described in claim 7, the front surface on the upstream side of the protrusion is formed in a taper shape toward the downstream side. Thereby, after the movable die is lowered to form the slits in the electrode plate material, the electrode plate material can be smoothly transported to the downstream side, and the productivity can be further enhanced.

Then, as described in claim 8, the corner portion on the upstream side of the protrusion is formed in a curved shape. Thereby, after the movable die is lowered to form the slits in the electrode plate material, the electrode plate material can be smoothly transported to the downstream side, and the productivity can be further enhanced.

Further, as described in claim 9, a projection for holding the electrode plate material when forming the slit is provided on the side surface of the second stationary die from the most upstream stationary die. Thus, when forming a slit having a large cross-sectional area with a multi-die, since the node portion of the electrode plate material can be held by the protrusion, the slit can be formed smoothly without breaking the node portion, and the slit is formed. The slit can be expanded comfortably. Therefore, it is possible to improve the productivity of the strip-shaped material provided with the lattice portion, and it is possible to prevent the frame bone of the lattice portion from being twisted and from breaking the cracks at the ends of the slits.

[Brief description of drawings]

FIG. 1 is a perspective view showing a lead-acid battery provided with an electrode plate obtained by using a grid forming device for an electrode plate material according to the present invention.

FIG. 2 is a perspective view showing an apparatus for forming a grid of an electrode plate material according to the present invention.

FIG. 3 is a perspective view showing a main part of a grid forming device for an electrode plate material according to the present invention.

FIG. 4 is a first explanatory diagram showing a method for forming a grid of an electrode plate material according to the present invention.

FIG. 5 is a second explanatory view showing the grid forming method of the electrode plate material according to the present invention.

FIG. 6 is a third explanatory view showing a method of forming a grid of an electrode plate material according to the present invention.

FIG. 7 is a fourth explanatory view showing the grid forming method of the electrode plate material according to the present invention.

[FIG. 8] Second to second grid forming devices for electrode plate material according to the present invention
It is a front view showing a 4th embodiment.

FIG. 9 is a fifth embodiment of the grid forming device for the electrode plate material according to the present invention.
It is a front view showing a 6th embodiment.

FIG. 10 is a first explanatory diagram showing a conventional grid forming method for an electrode plate material.

FIG. 11 is a second explanatory view showing a conventional method for forming a grid of an electrode plate material.

FIG. 12 is a third explanatory view showing a conventional method of forming a grid of an electrode plate material.

FIG. 13 is a front view showing a lattice body.

[Explanation of symbols]

10 Lead acid battery 12 plates 20 Lattice forming device for electrode plate material 22,26 Fixed die 32, 36 movable dies 40 plate material 42 transport path 43 slits 44 lattice 45, 46, 47, 50, 52, 54, 56, 58 protrusions 50A, 52A Top of protrusion 54A Protrusion corner Front of 56A protrusion 58A Protrusion corner

Claims (9)

[Claims] 1. A plurality of fixed dies are arranged from an upstream side to a downstream side along a conveying path that conveys a long strip-shaped electrode plate material serving as an electrode plate of a lead storage battery, and the fixing of the downstream side is performed. The dies are offset in a direction orthogonal to the transport direction, and a plurality of movable dies that are vertically movable above these fixed dies are lowered, so that the polar plate is formed by the movable dies and the fixed dies. While forming slits in the material, widen these slits, after widening the slits, raise the movable die,
A certain amount of the electrode plate material is conveyed, and in this state, the movable die is lowered again to form new slits along the slits by the movable die and the fixed die, and these new slits are also formed. And a grid forming device for a plate material for forming a grid on the plate material by sequentially repeating the above steps, wherein at least a second fixing from the most upstream fixing die of the plurality of fixing dies is performed. In the die, the side surface of the electrode plate material on which the slit is formed is provided with a protrusion for holding a predetermined portion of the electrode plate material when the slit is formed. Grid forming device. 2. The grid forming device for the electrode plate material according to claim 1, wherein the fixed die and the movable dies are provided in two sets in parallel. 3. The grid forming device of the electrode plate material according to claim 1, wherein the protrusions are arranged so as to be located at a node portion between the slits. 4. The grid forming device of the electrode plate material according to claim 1, wherein the projections are inclined so that the upper ends thereof have a downward slope in a direction away from the fixed die. 5. The grid forming device of the electrode plate material according to claim 1, wherein the upper edge of the protrusion is lowered from the upper edge of the fixed die by a predetermined distance. 6. The grid forming device of the electrode plate material according to claim 1, wherein the protrusion has a curved upper end corner. 7. The grid forming device for the electrode plate material according to claim 1, wherein the projection has a front surface on the upstream side which is tapered toward the downstream side. 8. The grid forming device of the electrode plate material according to claim 1, wherein the protrusion has a curved corner at the upstream side. 9. A plurality of fixed dies are arranged from the upstream side to the downstream side along a conveying path for conveying a long strip-shaped electrode plate material serving as an electrode plate of a lead storage battery, and the fixed die on the downstream side is arranged. Is offset in a direction orthogonal to the transport direction, and a grid is formed on the plate material using a grid forming device for plate material in which a plurality of the movable dies are provided above and above the fixed dies so as to be vertically movable. A method for forming a grid of electrode plate material for forming a portion, wherein a slit is formed in the electrode plate material by the movable die and the fixed die by lowering the plurality of movable dies, and the slits are formed. After expanding the slit, raise the movable die after expanding the slit,
A certain amount of the electrode plate material is conveyed, and in this state, the movable die is lowered again to form new slits along the slits by the movable die and the fixed die, and these new slits are also formed. In the grid forming method of the electrode plate material for forming a grid on the electrode plate material by sequentially repeating the above steps, in at least a second fixed die from at least the most upstream fixed die of the plurality of fixed dies, , By providing a protrusion on the side surface forming the slit in the electrode plate material,
When forming the slits with the movable die and the fixed die, a node portion between a plurality of slits formed by the most upstream fixed die in the electrode plate material is held by the protrusion. Method of forming grid of plate material.