Di-nucleon exotics in a joined spring model and statistics of quarks

To take account of the effects due to triality phenomenologically, we set up, following a similar line to in the string-junction model, a joined-spring mechanism into the quark model, where a junction plays a role of neutralizer of forces acting on it. Then we reinvestigate the level structures of di-nucleon exotics in the two promising unified model, the ''standard'' color quark model and the Bose quark model. The results, which are drastically changed from the simple case of shell-type harmonic oscillator in a previous-work, seem to show that the Bose Q. M. is much favored over the color Q.M. by present experiments. Feasible experiments to further clarify this are also proposed. (author)