| 摘要 |
Roof insulation applicator (10) for applying sheet material to the roof of an industrial building includes a carriage (12) for mounting on adjacent purlins (14 and 15) of a partially completed roof. Support roller (40) is applied by the carriage to the upper surfaces of the purlins (14 and 15) and the carriage is tiltable about the support roller (40). The center of gravity of the carriage (12) is applied rearwardly of the support roller (40). Purlin engager (60) is mounted to the front of the carriage and engages under the upper laterally extending flange (22) of the purlin (14) and limits the downward pivoting of the rear end of the carriage applying a lever arm effect by the weight of the rear portion of the structure to the support roller (40). This firmly holds the sheet material in its stretched configuration extending from the roof panel (16) out to the support roller (40), reducing the tendency of the sheet material to sag in between the adjacent purlins. Magnets (95 and 96) are mounted to the rear of the carriage to hold the carriage against the purlins when the purlin engagers are inoperative.
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