Application Example (1-06)
Vending Machine

Application Example (1-06)

Vending Machine

Sense cup dispenser door open


  • ・Detect the opening/closing of the door of the vending machine cup dispenser.

Issues & Requests

  • ・Want to reduce the number of components by sensing the door made of transparent plastics by a reflective sensor.
  • ・Need a sensor to allow the dispersion of the workmanship of the assembled door.

If adopting a groove-shape sensor, components to interrupt light perfectly are necessary, leading to the increase of the number of components and the increase of the man-hour of assembling such as positional adjustment.


  • ・Adopted model:
    Light convergent reflective sensor B5W-LB2112-1
  • ・This sensor is optically designed to detect objects such as specular, black, and transparent objects. Therefore, it is effective for detecting objects made of transparent plastic.
  • ・Due to the wide detection range for various objects (refer to the figure below), door rattling is acceptable to some extent.
  • ・This sensor has a function that makes it less susceptible to disturbance via light. However, it may malfunction depending on the type and intensity of the light disturbance, so install a sensor to prevent the light disturbance from entering. 

For details, refer to B5W-LB Series: Light Convergent Reflective Sensor User’s Manual.

  • Distance Characteristics for
    Various Reflective Objects

*The possibility of detecting the object varies depending on the sensing object or how to install the sensor.
Be sure to conduct sufficient evaluation using the actual devices before staring practical use.

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