TRIMMING DEVICE FOR AN ELECTRODE FILM OF A SECONDARY BATTERY

The present invention relates to a trimming device for an electrode film of a secondary battery. The trimming device comprises: vertical columns supported by a frame; main shafts having first and second eccentric axis portions having mutually different rotational center axes; an elevation force transfer unit coupled with a bottom portion of the vertical column; a fine adjusting unit which is mounted at a lower side of the elevation force transfer unit; an upper elevated body which is installed at an upper portion of the main shaft and includes an upper mold; a lower elevated body which is arranged at a lower portion of the upper elevated body and includes a lower mold; a plurality of first connecting arms which are coupled with the first eccentric axis portion of the main shaft, linked with the elevation force transfer unit, and driven by the axial rotation of the main shaft so as to provide an up-down motion for the upper elevated body; and second connecting arms which are coupled with the second eccentric axis portion of the main shaft, connected with the lower elevated body, and driven by the axial rotation of the main shaft so as to raise or lower the lower elevated body. The trimming device for an electrode film of a secondary battery as above is capable of a fine adjust on the gap between the upper mold and the lower mold, which optimally maintains, even after repeated wearing of a punch, a gap between the punch and a punch hole, thereby enabling an effective trimming. In addition, the elevation motion of the upper and lower molds is realized by two sets of symmetrical connecting arms, which are connected with each other by way of a timing belt, which prevents, during operation, the upper and lower molds from being inclined, and suppresses the horizontal direction vibration, thereby improving the overall operation accuracy.