| 摘要 |
<p>-142- The invention provides a grid for a battery plate in which, when a metal sheet is formed into a grid-like shape, rupture due to torsion or stress concentration does not oc- cur in a basal portion of a wire which is drawn out from a node of the grid, thereby preventing corrosion due to elec- trolyte from advancing so as not to cause a crack of corro- sion in an early stage. The invention provides also a bat- terp using the grid for a battery plate, a method of pro- during the grid for a battery plate, and a battery using it. In a grid for a battery plate in which large number of slits each configured by a out elongating in a longitudinal direction are formed in a metal sheet in a zigzag pattern, the metal sheet is stretched in the width direction to de- velop the slits, and nodes are connected to one another to form a lattice-like shape, by four wires which are obliquely bent to be drawn out, at least one of the four wires connected to each of the nodes is bent in an oblique direction via a drawn-out portion which is drawn out from the node in a substantially longitudinal direction. A small slope having an inclination angle, or a curved face is interposed between slopes of peripheral side faces in a range from a valley to a ridge in a disk cutter which is placed in a disk cutter rollfor a rotary expander. An inclined face which more approaches the axis as being -143- nearer to a disk face on the side where a groove is farmed, in a range from a ridge to a valley where the groove is formed, in a disk cutter which is placed in a disk cutter roll for a rotary expander. A small slope is interposed between a valley and at least a front slope of a peripheral side face of a ridge which is rearward adjacent to the val- ley, the small slope having an inclination angle which is between angles of the two faces. A grid for a battery plate is produced by using disk cutters in which a range from a valley to a groove is chamfered. The production method is configured so that, in each of ridges of endmost disk cutters which are disposed respectively on both the ends of a lower disk nutter roll, a peripheral side face configured by a reference circumferential face of a prede- termined radius is formed, and, in each of valleys serving as endmost node forming valleys in the endmost disk cutters, an inward inclined face is formed, the inward inclined face being a tapered face which is recessed toward the center from the reference circumferential face, and which is in- ward inclined.</p> |
