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    • 2. 发明授权
    • Jam-sensing system and apparatus
    • 卡纸传感系统和装置
    • US4249080A
    • 1981-02-03
    • US8825
    • 1979-02-02
    • Wayne W. PritchettHenry Bleggi
    • Wayne W. PritchettHenry Bleggi
    • B65H7/00G03G15/00
    • G03G15/70B65H7/00
    • A system for continuously transporting individual articles or a succession of uniformly-spaced articles on a moving conveyor surface through one or more work stations and for providing a warning signal when the normal location of any one of said articles changes relative to said conveyor surface by more than a predetermined permissible distance at a predetermined work station where such changes in spacing are most objectionable or dangerous. The system comprises a pulse-supplying means or machine clock for supplying pulses having a variable frequency proportional to the rate of movement of the conveyor surface, a delay means for providing a conveyor displacement signal when said conveyor surface has moved a predetermined distance and sensing means activated by each of said articles as they travel said predetermined distance to provide an article travel time signal. The system comprises means for comparing the timing difference, if any, between the conveyor travel time signal and the article travel time signal and for providing a warning signal when said signal times vary by more than a variable predetermined amount. According to another embodiment, the present system provides gap detecting means for comparing the web travel signals with the article travel signals for each of the succession of articles to detect the presence of spacing between articles in a particular work station and provide an alternative warning signal which, like the first warning signal, can be used as desired, such as to deactivate the particular work station, or stop the conveyor, or sound an alarm.
    • 一种用于在移动的输送机表面上通过一个或多个工作站连续运送单个制品或一系列均匀间隔的物品的系统,并且当任何一个所述制品的正常位置相对于所述输送机表面改变时,提供警告信号 超过预定工作站的预定允许距离,其间隔的这种变化是最令人反感或危险的。 该系统包括用于提供具有与输送机表面的运动速率成比例的可变频率的脉冲的脉冲供给装置或机器时钟,用于当所述输送机表面已经移动预定距离时提供输送机位移信号的延迟装置和感测装置 当所述物品行进所述预定距离时由每个所述物品激活以提供物品行进时间信号。 该系统包括用于比较输送机行进时间信号和物品行进时间信号之间的时间差(如果有的话)的装置,以及当所述信号时间变化超过可变预定量时提供警告信号的装置。 根据另一实施例,本系统提供间隙检测装置,用于将网路行进信号与用于每​​个连续物品的物品行进信号进行比较,以检测在特定工作站中的物品之间的间距的存在,并提供备选警告信号, ,如第一个警告信号,可以根据需要使用,如停用特定的工作站,或停止输送机,或发出警报。