  We evaluate the pi-N-N, pi-Sigma-Sigma and pi-Sigma-Lambda coupling constants
using QCD sum rules based on pion-to-vacuum matrix elements of correlators of
two interpolating baryon fields. The parts of the correlators with Dirac
structure k-slash gamma_5 are used, keeping all terms up to dimension 5 in the
OPE and including continuum contributions on the phenomenological side. The
ratios of these sum rules to baryon mass sum rules yield stable results with
values for the couplings of g_{pi NN}=12+/-5, g_{pi Sigma Sigma}=7+/-4 and
g_{pi Sigma Lambda}=6+/-3. The sources of uncertainty are discussed.
