JPS6347114B2 - - Google Patents

Description

[Detailed Description of the Invention] Conventionally, in order to increase the active material holding power of a grid substrate for a storage battery punched from a blank plate, a large number of vertical bars, ... and horizontal bars constituting the middle grid part have been used. Among these, all of the vertical bars are bent in a zigzag pattern into a waveform of the same pitch, i.e., the vertical bars are bent so that the wave peaks and troughs of each waveform vertical bar are aligned on the same horizontal line. is known. FIG. 1 shows a vertical cross-sectional view of this board across the horizontal beams. a
b is an active material filling space having an appropriate thickness surrounded by the inner area of the outer peripheral frame a, and c
is a large number of intersecting wave-shaped vertical bars d... and horizontal horizontal bars e... which divide the space b into a large number of lattice windows.
d1 is the crest of the wave of the corrugated vertical bar d, d2 is the trough of the wave, f is the ear protruding outward from the upper edge of the outer peripheral frame part a, and g is from the lower edge thereof. Showing legs projecting outward. Each corrugated vertical bar d follows the direction perpendicular to the drawing paper.
The crests d1 and troughs d2 of each wave are aligned in a line perpendicular to the plane of the paper in the drawing, and on the opposite side of each crest row and trough row, there is a horizontal groove shaped like a V-shaped cross section. Longitudinal active material spaces 2a, 2a extending in the direction...
has a generated form.

When manufacturing an electrode plate by a conventional method after filling such a known substrate with an active material paste, a so-called dropped frame phenomenon often occurs in the manufacturing process, that is,
A phenomenon is observed in which the filled active material paste falls in rectangular pieces, resulting in the inconvenience that prevention of falling of the active material is not yet sufficient.

The present invention improves the conventional board of the above-mentioned type and provides a punched grid board for a storage battery which prevents frame drop.
a step of punching out a punched substrate having a space 2 for filling an active material with an appropriate thickness in an inner region thereof, and a medium lattice portion 3 consisting of a large number of vertical bars 3A and horizontal bars 3B in the space 2; A step of bending either one of the vertical bars 3A or the horizontal bars 3B of the substrate in a zigzag shape in the thickness direction of the active material filling space 2 to form a corrugated vertical bar 3A or horizontal bar 3B. In the method of manufacturing a punched grid substrate for a storage battery, when forming a corrugated vertical bar 3A or horizontal bar 3B, adjacent vertical bars 3A, 3A or horizontal bars 3B, 3
It is characterized in that the pitches of the waves B are shifted from each other so that they are bent in a zigzag shape.

FIGS. 2 to 5 and 9 show a punched board obtained by an example of implementing the present invention, in which the outer peripheral frame part is punched out from a thin blank plate made of lead or lead alloy [substrate punching process]. 1 is bent to form a desired height [outer peripheral frame part 1 bending step], and an active material filling space 2 having a thickness corresponding to the height of the outer peripheral frame part 1 is formed surrounding the inner area of the outer peripheral frame part 1. A large number of rectangular lattice windows are formed in the space 2 by punching out a large number of mutually orthogonal lattice windows constituting the middle lattice part 3 [middle lattice part 3 forming process]. Vertical beam 3A with a square cross section...
and the horizontal bars 3B..., in the illustration, the vertical bars 3A... are connected to the active material filling space 2.
[Vertical beam 3A bending process] The vertical beam 3A is bent in a zigzag waveform in the thickness direction within the thickness of the vertical beam 3A. in this case,
According to the present invention, each vertical bar 3A adjacent to each other in the vertical bar 3A...
In the relationship between A and 3A, the zigzag waves are bent so that their pitches are shifted by half a pitch from each other.
That is, as clearly shown in the third illustration and the fifth illustration, each crest 3A of each wave of the adjacent corrugated vertical bars 3A, 3A
1 and each valley 3A2 are bent so that they are shifted by half a pitch and are shifted to the upper and lower sides of the thickness of the active material filling space 2. Therefore, in the present invention, pitch refers to the length of one period of a zigzag waveform, and in the illustrated example, each peak portion 3A of the vertical bar 3A.
The difference in pitch means that the starting points of the waveforms are different from each other. In this way, the active material filling space 2 has crests 3A1 of every other vertical bar 3A distributed regularly over its entire surface on the upper side of its thickness, and every other vertical bar 3A on the lower side thereof. The peaks 3A1 of the vertical bars 3A are regularly distributed over the entire thickness of the active material filling space 2, forming a longitudinal cross section V as seen in conventional substrates.
By eliminating the spaces 2a, 2a... of the character-shaped grooves, the product can be well held by these corrugated vertical bars 3A... in which the active material paste filled in the active material filling space 2 is evenly dispersed. can get. In addition, in this method, in the bending of such corrugated vertical bars 3A..., each intersection part 4, 4 with the horizontal bar 3B... which intersects them.
. . . , the adjacent corrugated vertical bars 3A, 3A are bent in opposite directions, that is, one side has a crest 3A.
1 is bent so as to form a trough 3A2 on the other side, the connection portion 5 between vertical bars of the horizontal bar 3B connecting the vertical bars 3A, 3A adjacent to each other is clearly shown in FIGS. 4 and 5, respectively. As shown in FIG. 2, a connecting portion 5 between vertical bars is obtained which is inclined in the thickness direction with respect to the horizontal plane of the thickness of the active material filling space 2. In other words, all horizontal bars 3B...
Also, since the active material filling space 2 is formed into a zigzag wave-shaped horizontal bar in the thickness direction, a product that can be filled and retained with the active material paste can be obtained even better. FIGS. 6 to 8 show another embodiment of the present invention, in which the zigzag-like wave-shaped bends of each adjacent vertical bar 3A, 3A are bent in opposite directions to form half-pitch peaks and valleys. However, the peaks 3A1 and valleys 3A1 and 3A1 are different in phase.
The difference is that the bending of A2 was performed at the connecting portion 6 between the horizontal bars of the vertical bars 3A between the vertical bars 3A and the horizontal bars 3B perpendicular to each other. As clearly shown in FIGS. 7 and 8, the connecting portions 5 between the vertical beams of the horizontal beams 3B having a rectangular cross section become the connecting portions 5 between the vertical beams twisted in opposite directions. That is, since the twisted surface portion 5a becomes an inclined surface 5a that is inclined with respect to the thickness surface of the active material filling space 2, the protection of the active material thereby becomes significantly better than that of the horizontal bar 3B before bending. . Instead of the case of the vertical bar 3A side in the above embodiment, the same can be applied to the horizontal bar 3B side...

In the above embodiment, when forming the corrugated vertical bars 3A or horizontal bars 3B on the board, the corrugations were formed after punching a thin blank plate made of lead or lead alloy into a predetermined board shape. Using the manufacturing device for punched substrates for storage batteries shown in Japanese Patent Publication No. 60-25867, which was previously proposed by et al., a long strip-shaped thin blank plate was bent at its outer circumferential frame portion to form a frame, and the inner area was cut out. A lattice window is punched out to form vertical bars and horizontal bars, then one of the bars is pressed into a zigzag waveform using the method of the present invention, and then the outer periphery of the outer frame is shaped into a predetermined shape with ears and legs. Alternatively, the substrate may be punched out in the shape of the substrate.

In this way, according to the present invention, in any one of the many bars 3A...3B... constituting the inner lattice of the punched board, the pitch of the waves of each neighboring bar is shifted from each other. Since the active material filling space 2 is bent as shown in FIG.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of a conventional punched grid substrate with a part omitted, Fig. 2 is a plan view of an example of the present invention with a part omitted, and Fig. 3 is a section cut along the line - - of Fig. 2. 4 is a cross-sectional view taken along the line, FIG. 5 is an oblique view of a part of the middle lattice section in FIG. 2, FIG. 6 is an oblique view of a modified lattice section, and FIG. FIG. 6 is a cross-sectional view taken along the line, FIG. 8 is a cross-sectional view taken along the line, and FIG. 9 is a process diagram of an example of the manufacturing method of the present invention. 1...Outer peripheral frame portion, 2...Space for filling active material, 3
...Medium lattice part, 3A...Corrugated vertical bar, 3B...Horizontal bar, 3A1...crest of vertical bar, 3A2...trough of vertical bar, 4...crossing part, 5...vertical of horizontal bar inter-piece connecting part,
6...Connection part between horizontal bars of vertical bars.

Claims (1)

[Claims] 1. An outer peripheral frame part 1 from a blank plate, a space 2 for filling an active material with an appropriate thickness in the inner area of the frame part 1, and a large number of vertical bars 3A and horizontal bars 3B in the space 2. a step of punching out a punched substrate having a medium lattice portion 3, and zigzag one of the vertical bars 3A or the horizontal bars 3B of the punched substrate in the thickness direction of the active material filling space 2; In the manufacturing method of a punched grid substrate for a storage battery, which comprises a step of bending the substrate into a corrugated shape to form a corrugated vertical bar 3A or horizontal bar 3B, in forming the corrugated vertical bar 3A or horizontal bar 3B, Adjacent vertical bars 3A, 3A or horizontal bars 3B, 3
A method for manufacturing a punched grid substrate for a storage battery, characterized in that the pitches of the waves B are shifted from each other and bent in a zigzag shape.