| 摘要 |
1,032,424. Cams and followers. CROWN ZELLERBACH CORPORATION. April 9, 1963 [April 26, 1962], No. 14156/63. Heading F2K. [Also in Division H2] A control device, e.g. for a machine collating articles such as paper bags, comprises first and second rotary cams rotating at different speeds, and a follower which normally engages the second cam but which, when periodically aligned with an aperture therein, extends through the aperture to engage the first cam, the device effecting a control function in response to the follower engaging a particular portion of the first cam. Microswitches 54, 56 are operated after predetermined numbers of revolutions of an input shaft 1 which drives cams 31, 32 through gears 7, 28 and a shaft 26, and a cam 41 through a reduction gear unit 9, gears 13, 29, and a shaft 27, the cam 41 having a lower speed than the cams 31, 32. Two followers 50, 51 on the arms 52, 53 of microswitches 54, 56, respectively, are aligned with the edges of cams 31, 32, respectively, and normally ride on the flange surface 44 of the cam 41. When an aperture 46 in the flange 44 corresponds in position to one of the followers, the follower drops into contact with the edge of its respective cam 31 or 32, and if while the follower is contacting this it comes into engagement with a cut-out 61 or 62 therein, the microswitch carrying that follower is actuated. Cam 31 is angularly adjustable relative to cam 32 by means of screws 34 engaging slots 33 of cam 31, which screws normally hold the two cams rigidly together. Any required number of cams, such as 31, 32, and microswitches may be used and the cam 41 may have more than one aperture 46. |
