Patent ID: 7712497

Claim:
An anti-slipping device for dual tires comprising: a plurality of spike members which comprises an insertion plate bent in a trapezoidal shape to be inserted between the dual tires, and close-contact plates integrally and laterally extending from opposite sides of the insertion plate to contact each surface of the dual tires; a belt connecting the insertion plates of the plurality of spike members to each other; and a fastener coupled to opposite ends of the belt to adjust tension of the belt, wherein the fastener includes first and second connection rings each inserted into insertion space parts formed at both ends of the belt, and a belt fastener detachably coupled to the first and second connection rings to adjust tension of the belt, wherein the belt fastener comprises a length adjustment part having a first fastening ring at one end of the length of the adjustment part detachably coupled to the first connection ring, and a plurality of length adjustment holes formed in a longitudinal direction of the length adjustment part at predetermined intervals; and a tensioning member having a second fastening ring at one end of the tensioning member coupled to the second connection ring, such that the other end of the length adjustment part is slidably inserted inside the second fastening ring to sequentially lock or release the length adjustment holes using a predetermined resilient force to maintain tension of the belt.