STRUCTURE FOR A CENTER ROLLER ARM OF A SLIDING DOOR FOR REGULATING HEIGHT OF A FIXED SLIDING DOOR AND AN ADJUSTING BRACKET TOGETHER BY ROTATING CLOCKWISE OR COUNTERCLOCKWISE AN ADJUSTING PIN BOLT

摘要

PURPOSE: A structure for a center roller arm of a sliding door is provided to precisely control the height of the sliding door and accordingly to improve control and operation efficiencies of the center roller arm. CONSTITUTION: A structure for a center roller arm of a sliding door is composed of a first bracket arm(110) having a roller(111) for moving along a center rail; a second bracket arm(120) formed with a mounting hole and hinge-combined with the first bracket arm; an adjusting bracket(130) formed with a combining hole and bolt-joined to the sliding door through the mounting hole; and an adjusting pin bolt(140) engaged with the adjusting bracket by threads. Both ends of the adjusting pin bolt are hinge-combined to the second bracket arm. The mounting hole formed at the second bracket arm is larger than the combining hole arranged at the adjusting bracket. The second bracket arm and the adjusting bracket are united to a vehicle body by at least two bolts(131) along a diagonal line.