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    • 10. 发明授权
    • Safety device for a kneading machine using rolls
    • 用于使用辊的捏合机的安全装置
    • US5921367A
    • 1999-07-13
    • US805731
    • 1997-02-25
    • Tohru KashiokaYasuyuki NishimuraShogo TannoKatsuya Okamoto
    • Tohru KashiokaYasuyuki NishimuraShogo TannoKatsuya Okamoto
    • F16P3/14G08B29/00
    • F16P3/14F16P3/144F16P3/147F16P3/148
    • A safety device detects when a worker's hand enters a hazardous region between rollers of a kneading machine, and stops rotation of the rolls to prevent an accident. Each time the rollers are stopped, the orientation of photoelectric sensors is switched from the vicinity of the gap between the two rollers to a test reflection member, and the quantity of received light is compared to a predetermined value, to prevent workers form starting work without knowing a fault or accident has happened. More specifically, a bar electrode of an electrostatic capacitance sensor is disposed above and near the gap between the two rollers, for detecting a physical quantity that is changed by entry of a worker's hand. When the electrostatic capacitance detected by the sensor exceeds a predetermined value, a judging circuit supplies a control signal to stop a driving unit that operates the kneading machine. Heat ray sensors or photoelectric sensors may be used as alternatives to electrostatic sensors. As an additional feature, case housing light projectors and photoelectric sensors are rotatably disposed above and near the gap between the two rollers, and a test reflector is disposed on the side of the case. When the rollers are stopped, a light receiving object switching circuit rotates the case and a test circuit tests the light receiving states of the photoelectric sensors.
    • 安全装置检测工人的手进入捏合机的辊之间的危险区域,并停止辊的旋转以防止事故。 每次停止辊子时,光电传感器的方向从两辊之间的间隙附近切换到测试反射部件,并将接收到的光量与预定值进行比较,以防止工作人员在没有 知道故障或事故已经发生。 更具体地,静电电容传感器的棒状电极设置在两个辊之间的间隙的上方和附近,用于检测通过工人手的进入而改变的物理量。 当由传感器检测到的静电电容超过预定值时,判断电路提供控制信号以停止操作捏合机的驱动单元。 热射线传感器或光电传感器可用作静电传感器的替代品。 作为附加特征,壳体投光器和光电传感器可旋转地设置在两个辊之间的间隙上方和附近,并且测试反射器设置在壳体的侧面上。 当辊停止时,受光对象切换电路使壳体旋转,并且测试电路测试光电传感器的光接收状态。