| 摘要 |
<p>An apparatus for producing rectangular frames composed of strips (L) joined by joining elements inserted by fixing machines so as to straddle the joints formed by the right-angled mating of the strips, the strips being supplied in the intended sizes by a feeder (1), four fixing machines (30-33) being provided which are arranged on a footing at the corners of an ideal rectangle and are provided with devices (34-35) for arranging the strips along the sides of the rectangle. The apparatus comprises at least one working assembly (40,41) for picking up in succession the strips at the output of the feeder (1) and for placing them on the fixing machines (30-33), so that the ends of two contiguous strips are arranged at right angles on each fixing machine, the working assembly comprising a supporting beam (42) for a rail (44) for the horizontal sliding of a carriage (45) which comprises a guide (49) lying at right angles to the rail (44), a slider (51) being slideable on the guide (49) and articulately supporting, about a vertical axis, a strip engagement element (74), actuation elements (80,52,72) for actuating the carriage (45), the slider (51) and the engagement element (74) between a position in which the engagement element (74) picks up, in successive steps, the strips exiting from the feeder (1) and a position in which it deposits the strips so that the opposite ends of each strip lie on a pair of fixing machines (30-33) which are not diagonally opposite, the steps being coordinated so as to form a rectangle of strips resting on the fixing machines (30-33). <IMAGE></p> |
