| 摘要 |
1,035,669. Conveyers. COMPAGNIE DE SAINT-GOBAIN. May 22, 1963 [May 22, 1962], No. 20426/63. Heading B8A. Strips of glass of different sizes 4, 5, 6 cut from a sheet 3 on rollers 1 by conventional means A are conveyed in the direction of an arrow f 1 by feed rolls 2. Adjacent a side conveyer 8, with centre axis xy the leading edge 12 of a sheet of glass 12 (Fig. 3) engages a stop 13 on a slide 15 linked by a cable 17 to a slide 16 carrying a contactor 14 so that when the slide 15 is moved by the sheet 11 the slide 16 moves in the opposite direction at the same speed. In the initial position (Fig. 2) the stop 13 and the actuator are a distance e apart, the axis XY bisects the distance e. If the length of the sheet is a the contactor 14 reaches the trailing edge of the sheet 11 when the sheet has moved a-e/2 after engaging the movable stop 13. The transverse centre line at this instant is aligned with the axis xy and as the contactor 14 clears the trailing edge of the sheet it passes a signal to means 10 which may transfer the sheet 11 to the side conveyer 8. Actuation of the means 10 is also controlled by a measuring device consisting of a wheel 25, on a spindle 26, engaging the bottom of the sheet 11 and driving a perforated wheel 27 the holes 28 passing in front of a light 29, the light passing through the holes 28 being received by a photo-electric diode 30 generating pulses amplified by an amplifier 31 and counted by a counter 32. A contactor 24 in the vertical plane containing the axis xy, which also contains the axis of the spindle 26, energizes the measuring means when the leading edge 12 reaches it so that a train of pulses proportional in number to the distance of forward travel of the strip is counted by counter 32. At a predetermined number of pulses (effectively measuring the strip length) a signal is emitted by the counter 32 and if this coincides with the signal from contactor 14 as the trailing edge of the sheet 11 clears it means 10 is actuated to transfer the sheet 11 to the side conveyer 8. When the two signals are not synchronized the sheet 11 is not transferred and continues along the feed rolls 2. Slide 15 comes into contact with a fixed stop 23, the stop 13 is depressed by the conveying force against a spring 22 so that the sheet 11 passes on while slides 15, 16 are returned to their initial position by a counterweight 20. The measuring device 25 to 32 may be set upstream of the axis xy in which case (Fig. 4, not shown) a memory store is provided for the signal from the counter 32. Fig. 5 (not shown) illustrates a modification in which the movable stop 13 and the slide 15 are replaced by a drive from one of the conveyer drive shafts 34. The slide 16 derives its motion from the drive shaft 34 through an electromagnetic clutch 39 operated by the contactor 14 when depressed by the leading edge of the sheet 11 to connect the drive to a drum 36 which winds up a cable 37 to move the slide 16 as in the previous embodiment described with reference to Fig. 3. |
