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1. 发明授权

US6032845A Variable pitch tape feeder and pitch selection switch therefor 有权
标题翻译：可变节距带式馈线器和音高选择开关
公开(公告)号：US6032845A
公开(公告)日：2000-03-07
申请号：US173590
申请日：1998-10-15
申请人： John Piccone , Scott C. Proctor , Patrick Leigh Simpson
发明人： John Piccone , Scott C. Proctor , Patrick Leigh Simpson
IPC分类号： B65H20/22 , B65H37/00 , H05K13/04 , B65H20/00
CPC分类号： B65H37/002 , B65H20/22 , H05K13/0417
摘要： In a variable-pitch tape feeder for feeding parts to a pick and place machine used to produce electronic circuit boards, a switch assembly is provided which controls the limits of a shutter movement and the tape advance distance dependent upon the desired pitch. The tape feeder uses a carrier tape to deliver parts to the pick and place machine. The parts are inserted into depressions at regular intervals along the length of the tape. To accommodate tapes of varying pitches, i.e., distances between parts, the feeder uses an electronic control unit to drive the tape feed mechanism and actuate a shutter. The shutter prevents small parts from escaping their respective depressions prematurely. The switch provides a stop surface which limits the rearward travel of the shutter and a flag which is detected by optical sensors to determine the position of the switch and thus the pitch desired by the operator. By limiting the rearward travel of the shutter, especially when using small-pitch parts, parts subsequent to the one positioned at the pick-up point will be prevented from escaping their respective recesses in the carrier tape. A control unit electronically advances the carrier tape the desired distance according to the position of the switch.
摘要翻译：在用于将部件馈送到用于生产电子电路板的拾取和放置机器的可变节距带式馈送器中，提供了一种开关组件，其控制快门运动的限制，并且取决于期望的音高的磁带提前距离。带式进纸器使用载带将零件传送到拾取和放置机器。这些部件沿着带的长度以规则的间隔插入到凹陷中。为了容纳不同间距的带，即部件之间的距离，馈送器使用电子控制单元来驱动带馈送机构并致动快门。快门可以防止小零件过早地脱离它们各自的凹陷。开关提供限制快门的向后行程的停止表面，以及由光学传感器检测到的标志，以确定开关的位置，从而确定操作者期望的音调。通过限制快门的向后行程，特别是当使用小间距部件时，位于拾取点的位置之后的部件将被防止脱离其在载带中的相应凹部。控制单元根据开关的位置将载带电子地推进所需的距离。

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