Combination structure for a labyrinth

A combination structure for a labyrinth comprising a plurality of labyrinth units, each said labyrinth unit composed of four frame rods, a reinforcing support bar and plural fixing members, said four frame rods having their ends mutually and vertically butt jointed to form into a square, each said frame rod having two ends respectively formed with a connecting end, said connecting end cut with a lengthwise recess and bored with an insert hole, each said frame rod bored with a plurality of insert holes in a wall of said frame rod, said reinforcing support bar obliquely set in said four frame rods, said reinforcing support bar having two ends respectively disposed with a connecting end, each said connecting end of said reinforcing support bar having two sides respectively cut with a lengthwise recess and bored with an insert hole, said fixing members inserted in said insert holes at said connecting ends of said four frame rods and at said connecting ends of said reinforcing support bar for securing said four frame rods and said reinforcing support bar together to make up a labyrinth unit;

• wherein one said connecting end of said frame rod is lengthwise cut with a one-half recess and another said connecting end of said frame rod is lengthwise cut with a two-thirds recess, while said reinforcing support bar has two sides of each said connecting end respectively and lengthwise cut with a one-third recess.