JPH0452591B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an apparatus for manufacturing electrode plates for lead-acid batteries.

PRIOR ART The expanding method of manufacturing electrode plates, which has been rapidly put into practical use in Japan in recent years, has excellent mass productivity and is suitable for manufacturing lead-acid batteries for automobiles. Currently, many problems remain in the process because it is significantly different from the manufacturing method using grids by casting. In manufacturing methods that use grids made by conventional mold casting methods, mechanical processing such as cutting and shaping is performed after filling with a paste-like active material (hereinafter referred to as paste) and before drying. However, in the expand method, after the paste is continuously filled into the lead alloy strip,
Since there is a process of cutting individual electrode plates, it is necessary to prevent the paste from peeling off or falling off, so a method is used in which both sides of the lead alloy strip are covered with thin paper called paste paper. However, the position of the paste paper strip pulled out from the paste paper roll is likely to fluctuate due to the precession of the rolls, and when covering the lead alloy strip, the paste paper strip may be misaligned with respect to the lead alloy strip, and the paste paper may be pulled out of the paste paper. This tends to cause the paste to fall off in exposed areas.

Therefore, phenomena such as misalignment of the paste paper strip with respect to the lead alloy strip due to the precession of the rolls will be explained in detail with reference to the drawings. A schematic diagram of the expanding method electrode plate manufacturing process is shown in FIG. In this figure, a long and thin lead alloy strip 2 made of a lead alloy sheet is drawn out from a coil 1, and is expanded by an expanding device 3 on both sides of the lead alloy strip, leaving an unexpanded portion in the lateral direction of the central length of the lead alloy strip. A mesh part is formed. Next, the shaping device 4
As shown in FIG.
In addition to punching out the material, it also corrects and flattens the undulations that occur during the expanding process. In Figure 2,
M is the expanded mesh portion, and D is the cutting width of the electrode plate. Therefore, after shaping, the paper is filled with paste using a paste filling device 5, and a paste paper supply mechanism is generally incorporated as a part of the paste filling device. In this paste paper supply mechanism, the paste paper strip 8' pulled out from the lower paste paper roll 8 is first taken into the lower part of the lead alloy strip 2, and after being filled with paste in this state, the upper paste paper roll 8 is The top surface of the lead alloy strip 2 is covered with a paste paper strip 9' drawn from the strip. In this state, the paste paper strip 8' forms a strip 2' covering both sides of the lead alloy strip 2, and the strip 2' is cut into individual plates by the cutting device 6. Next, this electrode plate is passed through a drying oven 7 to complete an electrode plate for a lead-acid battery. The paste filling device 5 is shown in detail in FIG. 3, as shown in which the lower paste paper strip 8' contacts the belt driven wheel 17 of the belt 11 near the apex and is placed under the lead alloy strip. Can be pasted on the side. Next, the paste in the paste hopper 10 is transferred to the lead alloy strip 2.
The upper paste paper strip 9' is then applied to the upper side of the lead alloy strip 2 by means of a paste paper presser roll 13.
The strip 2' filled with paste and covered with paste paper from above and below is fed to a cutting device. At this time, if the lower paste paper strip 8' is misaligned with respect to the mesh part M of the lead alloy strip 2, the filled paste will reach the belt 11 near the top of the belt drive wheel 16.
When the strips 2' and You end up with an unusable plate. Furthermore, if the upper paste paper strip 9' is misaligned with respect to the mesh portion M, the paste tends to adhere to the roller 13 that presses the paste paper against the strip 2, which also tends to lead to the paste peeling off or falling off. Therefore, in order to prevent the paste paper from shifting with respect to the mesh part, the conventional paste paper supply mechanism uses crown rollers 12 and 1 in the middle of the paste paper strips 8' and 9' drawn out from the paste paper rolls 8 and 9.
2' is provided, and this crown roller 12,
12' allows positioning of the paste paper strip relative to the lead alloy strip against long-period fluctuations caused by the gradual reduction in the outer diameter of the paste paper roll during use; however, the precession of the paste paper roll It had no effect on short-term fluctuations such as exercise. As shown in FIG. 4, a wheel cap 20 is made by wrapping paste paper around a ball core 21 and press-working the ball core 21.
With such a configuration, it is difficult to completely prevent precession, as shown by the arrow, due to accuracy.

OBJECTS OF THE INVENTION An object of the present invention is to provide an apparatus for manufacturing electrode plates for lead-acid batteries that eliminates misalignment between paste paper strips and lead alloy strips during the process of covering both sides of the lead alloy strips with paste paper. It is in.

Structure of the Invention The present invention involves continuously expanding an elongated lead alloy strip in the form of a sheet, leaving an unexpanded portion approximately in the center of the width of the lead alloy strip, and expanding the lead alloy strip on both sides. filling the mesh with a pasty active material, pasting paste paper drawn from a paste paper roll on both sides of the mesh filled with the active material, and forming a paste paper strip. The present invention provides an apparatus for manufacturing electrode plates for lead-acid batteries, which manufactures electrode plates by cutting the lead alloy strip covered with
The paste paper supply mechanism that supplies the paste paper includes a paste paper positioning mechanism that keeps the supply position of the paste paper strip constant, and the paste paper positioning mechanism uses a pair of rollers to move the paste paper strip in the width direction. It is characterized by being configured so that it can be pressed down.

As mentioned above, the manufacturing apparatus of the present invention does not prevent the paste paper roll from precessing itself, but rather maintains a constant position of the paste paper strip at the point where the paste paper strip is about to leave the paste paper roll. A holding mechanism is provided so that even if the paste paper roll undergoes precession, the paste paper strip can always be affixed to the lead alloy strip at a predetermined position.

EXAMPLES The present invention will be explained in more detail below using examples shown in the drawings.

Since the manufacturing apparatus of the present invention differs from conventional manufacturing apparatuses of this type only in the paste paper supply mechanism, this paste paper supply mechanism will be described below.

FIG. 5 shows a first embodiment of the paste paper supply mechanism of the present invention, in which the paste paper strip is pulled out approximately tangentially away from near the top of the paste paper roll 8. There is.
Rollers 2 are placed in the position where the paste paper strip is pulled out so as to sandwich the paste paper roll 8 from both sides.
4 and 25 are arranged. The rotation shaft 23 of the roller 24 is fixed, but the rotation shaft 2 of the roller 25 is fixed.
3 is rotatably supported by a stay 26, and is always pressed against the side surface of the paste paper roll 8 by a spring 27. Therefore, the position of the paste paper strip 8' is always constant. However, in this case, the center hole 28 of the wheel cap 20
It is necessary to leave a gap between the diameter of the shaft and the outer diameter of the shaft that passes through it.
Traditionally, this gap caused precession. At this time, the axis of each of the rollers 24 and 25 is the sixth
Shafts 18 arranged in parallel as shown
If the angles 1 and 2 formed by the axes of the rollers 24 and 25 are perpendicular to the axes of the paste paper roller 8, both sides of the paste paper roller 8 will constantly touch the rollers 24 and 25, which will damage the paper. It turns out. Therefore, it is desirable that the rollers 24 and 25 be installed non-parallelly as shown in FIG. At this time, the shaft 22 of the fixed roller 24 is installed so that its axis is oriented in the vertical direction, and the shaft 18 of the paste paper roll 8 is fixed so as to be tilted slightly to the right from the horizontal direction in FIG. The shaft 23 of the movable roller 25 is tilted further to the right in FIG. That is, the angles 3 and 4 formed by the axes of the rollers 24 and 25 with respect to the axis of the shaft 18 are both larger than 90 degrees. If installed in this way, the rollers 24, 25
Since the rollers 24 and 25 contact the roll 8 only near the peripheral edge of the paste paper roll 8, the rollers 24, 25 and the paste paper are not constantly worn and damaged.
In addition, since the shaft 18 is slightly tilted to the right with respect to the horizontal, the paste paper roll tends to slide in the direction of arrow a due to gravity, so even if the force pressing against the movable roller 25 is extremely small, the paste paper roll The position of the paper can be stabilized. Therefore, even paste paper with low strength can be used without being damaged.
It can be stably supplied and battery performance can be improved. Also, by applying a suitable amount of friction, it is possible to prevent wrinkles from forming on the paste paper.

FIG. 8 shows a second embodiment of the paste paper supply mechanism of the present invention, in which the rollers 24 and 25 have a truncated cone shape. Note that the other mechanisms are formed in the same manner as in the above embodiment.

If the rollers 24 and 25 are cylindrical in shape as shown in FIG. 7, tension due to friction can be applied to the paste paper strip 8' to prevent wrinkles from forming on the paste paper.
Since the feed rate of the paste paper strip to the paste filling device is always constant, the rotational speed of the rollers 24, 25 remains constant even as the outer diameter of the paste paper roll 8 becomes smaller and smaller. However, when the outer diameter of the paste paper roll 8 becomes smaller,
Since the mass of the rolls also decreases, the rollers 24, 2
Even though the tension applied by the paste paper strip 8' by the paste paper strip 8' remains constant, as the paste paper roll 8 becomes lighter, the tension created by the friction between the wheel cap 20 and the shaft 18 gradually decreases. Therefore, the tension will be different when the diameter of the paste paper roll 8 is large and when it is small, and when the roll has a large diameter, the tension must be applied to an extent that the paste paper strip 8' will not be damaged. However, when the roll reaches a small diameter, there will be insufficient tension and the paste paper strip 8' will wrinkle.
Therefore, as in this embodiment shown in FIG.
4, 25, the rollers 24, 2 become smaller as the diameter of the paste paper roll becomes smaller.
5 can be gradually increased and the tension of the paste paper strip 8' can be prevented from decreasing due to the increased friction of the rollers 24, 25 with the shaft 18. At this time, rollers 24', 2
The apex angle of the truncated cone 5' depends on various conditions such as the paste paper roll 8 used and its dimensions, so it cannot be determined unconditionally.
It is determined through experiments under each condition.

FIGS. 9a and 9b show a third embodiment of the paste paper supply mechanism of the present invention. In this embodiment, the shift of the paste paper strip with respect to the lead alloy strip caused by the precession of the paste paper roll 8 is In order to prevent this, a roller 27 having flanges 27a, 27a attached to the tip of an arm 28 is brought into contact with the paste paper roller 8. The arm 28 rotates up and down around a fixed shaft 30, and the contact point between the roller 27 and the paste paper roll 8 is located close to the position where the paste paper stripper 8' is just about to be separated from the paste paper roll 8. It is located. Also, the flange 2 of the roller 27
The width W1 excluding 7a and 27a is approximately equal to the width W2 of the paste paper roller. The arm 28 and the shaft 30 are connected using a high-precision needle bearing, thrust bearing, or the like 29, so that substantially no backlash occurs. Therefore, the position of the roller 27 having the flange does not substantially change in the horizontal direction. The position of the paste paper strip 8' fed out in this way is stable, and sufficient tension is applied to the paste paper strip 8' by the weight of the roller 27 and the arm 28. According to the embodiments shown in FIGS. 9a and 9b, the same effect as the embodiments shown in FIGS. 7 and 8 can be obtained, and when the paste paper runs out, a new paste paper roll can be replaced. Another advantage is that replacement can be done easily.

Effects of the Invention As described above, according to the present invention, the paste paper supply mechanism that supplies paste paper is provided with a paste paper positioning mechanism that keeps the supply position of the paste paper strip constant, and the paste paper position supply mechanism is Since the pair of rollers is configured to press the paste paper strip from the width direction, it is possible to prevent the paste from peeling off or falling off from the lead alloy strip due to misalignment of the paste paper strip with respect to the lead alloy strip, thereby producing a good electrode plate. The effect is that it can be produced.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the expanded process for manufacturing electrode plates, Figure 2 is a plan view of expanded lead alloy strips, and Figure 3 is a lead alloy strip filled with paste and applied to the surface of the paste. FIG. 4 is an explanatory diagram of a conventional paste paper roll, FIG. 5 is a perspective view of the first embodiment of the present invention, and FIGS. 6 and 7 are illustrations of the present invention. FIG. 8 is an explanatory diagram of the essential parts of the device according to the invention, FIG. 8 is an explanatory diagram of the essential parts showing the second embodiment of the invention, and FIGS. 9 a and b are explanatory diagrams of the essential parts showing the third embodiment of the invention, respectively. It is. 2... Lead alloy strip, 8, 9... Paste paper roll, 8', 9'... Paste paper strip,
24, 25...roller, L...portion of the lead alloy strip that is not expanded, M...mesh portion of the lead alloy strip that is subjected to the expansion process.

Claims (1)

[Scope of Claims] 1. An elongated lead alloy strip in the form of a sheet is continuously subjected to an expanding process, and an expanded process is performed on both sides of the lead alloy strip, leaving a portion that is not subjected to the expanding process approximately at the center in the width direction of the lead alloy strip. forming a mesh portion, filling the mesh portion with a paste-like active material, and pasting paste paper strips drawn from a paste paper roll on both sides of the mesh portion filled with the active material;
In an apparatus for manufacturing electrode plates for a lead-acid battery, which manufactures electrode plates by cutting the lead alloy strip covered with the paste paper strip into individual electrode plates, the paste paper is fed to a paste paper supply mechanism that supplies the paste paper. A paste paper positioning mechanism for keeping the supply position of the strip constant, the paste paper positioning mechanism being configured to press the paste paper strip from the width direction with a pair of rollers. Manufacturing equipment for storage battery electrode plates. 2. The lead-acid battery according to claim 1, wherein the paste paper positioning mechanism is constituted by a pair of rollers whose portions that contact the paste paper strip are installed non-parallel. Manufacturing equipment for electrode plates. 3. The apparatus for manufacturing an electrode plate for a lead-acid battery according to claim 2, wherein the roller has a truncated cone shape. 4. The apparatus for manufacturing an electrode plate for a lead-acid battery according to claim 1, wherein the paste paper positioning mechanism is constituted by a pair of rollers having flanges at both ends.