Enclosed in a frame

By type of door mechanism, can be equipped with a frame or support roller. If this is a frame structure, a door enclosed in a frame moves along a special groove on rollers made of plastic or metal. In this case, it is required to regularly clean the grooves, since dust gets into them, making the free movement of the doors difficult. A more technological and convenient way is one in which the rollers move along the rail, and there is also a limiter to prevent the door slipping.