Guiding device for upper knife block of sliding-block type shearing machine

The utility model relates to a guiding device for an upper knife block of a sliding-block type shearing machine. The guiding device is mainly used for a gantry type shearing machine of which the upper knife block works in a sliding-block way and comprises an upper knife block body (2), inner guide rails (1), outer guide rails (4), adjusting wedge blocks (5), fixed seats (6) and wear plates (3), wherein the inner guide rails (1), the outer guide rails (4), the adjusting wedge blocks (5) and the fixed seats (6) are respectively two in number and installed bilaterally and symmetrically in a shearing machine body (7) of the shearing machine from inside to outside; the adjusting wedge blocks (5) are in close contact with the outer guide rails (4) and the fixed seats (6) and respectively form two inner 'V'-shaped guide slots bilaterally and symmetrically; the wear plates (3) are four and fixedly installed on the two left and right outer 'V'-shaped guide rails of the upper knife block body (2) to form an outer 'V'-shaped guide body; the outer 'V'-shaped guide body is arranged in a cavity formed between the two 'V'-shaped guide slots; and the wear plates (3) are respectively attached to the working surfaces of the inner guide rails (1) and the outer guide rails (4). The guiding device is convenient for processing and mounting, and adjusting a gap between a sliding block and a lower knife block, and is wear-proof and reliable.