The crusher 200 of the present invention is provided with a cylindrical support rod 50 in the width direction at the rear lower side so that the support rod 50 can be coupled to the side surface of the crusher 200 by adjusting the height thereof. A plurality of holes 51 and 52 are formed in the side surface of the crusher 50 and the side surface of the crusher 200 and then the bolts 55 are inserted into the holes 51 and 52 by adjusting the height of the support rods 50 It is possible to adjust the height of the support rods 50 by combining them.