Abstract: The prefabricating rack frame are comprised of a column and a cross member. The column have plural slots along a longitudinal direction at an even interval, and the cross member have a pair of hooks to be inserted into respective slot, and a location restrictor is formed between the upper and the lower hook and bent rectangular to the hook, and tightly contracted on the outer surface of the column. The cross member further has a pit and a reinforcement rib; the pit is formed at the outer corner where each longitudinal end of the cross member meets the foot of the location restrictor; and a reinforcement rib is provided at the inner corner of the location restrictor and its configuration counterposes to that of the pit.

Abstract: The prefabricating rack frame are comprised of a column and a cross member. The column is comprised of plural inner slots and plural outer slots. The inner slots are arranged in one or two vertical row in the center. The outer slots are formed at the respective outer side of each line of the inner slot, and each outer slot is located between the upper and lower row of the inner slot at equal interval. A location restrictor of the cross member is bent parallel to the upper horizontal flange, by which the location restrictor is fully contacted on the side surface of the column along the upper horizontal flange. A hole is provided at the vertical web so as to overlap any of the round openings. The round openings and the hole are for engaging the column and the cross member by the screw.

Abstract: A mirror fixing device for a motor employing a beam reflector which can uniformly fix the beam reflector to a motor housing as well as prevent gas leakage from the housing. The device includes a cap having a body and a plurality of mirror fixing members united to the body. The body of the cap is capped on the top portion of the housing to prevent the gas leakage, and the mirror fixing members are radially projected from a lower circumferential surface of the body to uniformly press and fix the beam reflector to the housing.