| 摘要 |
<p>A runner wheel support for sliding doors, windows and the like consists of a support body which is a press fit in the respective frame, and which carries the support wheel or roller on an arm carried by a disengageable pivot. The wheel support arm has a cam member cooperating with a height adjustment screw and spring fingers on the support body to hold the wheel support in a stored position while the support body is fitted into a frame member, and thereafter to free the wheel support from this stored position and to hold it in an operative position. Preferably the support body is of L-shape and acts as a connector to join together mitre-cornered pieces of frame. Movement of the wheel support arm to a removal position disengages the cam member from the spring fingers, so that the arm can be disengaged from the pivot and removed. A spring is provided to urge the wheel support arm to the operative position, and the arm is provided with transversely-extending dimples that engage the bore side walls to centralize the wheel.</p> |
