Base plate for stacking copper-clad plates

The utility model discloses a backing plate for stacking copper-clad plates, which comprises a fixing plate and is characterized in that expansion plates are symmetrically hinged to two sides of the fixing plate, a plurality of first limiting clamping grooves are correspondingly formed in the upper surfaces of the expansion plates and the upper surface of the fixing plate along the same axis in a concave mode, and L-shaped supports are movably arranged in the first limiting clamping grooves in a matched mode. The lower portion of the L-shaped support extends into the first limiting clamping groove of the fixing plate from the first limiting clamping groove of the expansion plate, and the L-shaped support and the fixing plate are fixedly locked and connected through a tight jacking piece. 本实用新型公开的一种覆铜板堆叠用垫板，包括固定板，其特征在于：所述固定板两侧对称铰接有拓展板，所述拓展板与所述固定板上表面均对应沿同一轴线内凹有若干限位卡槽一，在限位卡槽一内配合活动设置有L型支架，所述L型支架的下部自拓展板的限位卡槽一延伸至固定板的限位卡槽一内，所述L型支架与所述固定板之间通过紧顶件锁固连接。