Roller assembly

In an upwardly-acting door structure arranged in a body opening, said door structure including a track mounted on said body and including at least two vertically-adjacent door panels, one of said panels having its lower marginal end portion configured as an elongated hinge section, another of said panels having its upper marginal end portion configured as a cooperative elongated hinge section, said hinge sections being slidably interfitted together in such manner as to permit one panel to shift relative to the other along the axis of elongation of said hinge sections while coupling said panels together for relative pivotal movement along the path of said track, the improvement which comprises:

• a roller assembly for guiding movement of said panels along said track and for reducing the ease with which said panels may shift laterally relative to one another, said roller assembly including
• a shaft having an exteriorly-threaded shank portion matingly received in one of said hinge sections, and having a hub portion arranged without said one hinge section, said hub portion providing a shoulder surface arranged without said one hinge section in spaced facing relation thereto;
• a roller rotatably mounted on said hub and arranged in said track;
• and
• a stop member having one portion normally sandwiched between said one hinge section and said shoulder surface, and having another portion arranged proximate said roller member in spaced relation thereto.