The application of DeviceNet in process control

A wheeled vehicle having the appearance of an insect, such as a spider, includes a main body portion housing a drive mechanism for propelling the vehicle across a suitable supporting surface. The drive mechanism is shiftable for operating a cord winch for pulling the vehicle or drawing objects toward the mouth of the spider. A plurality of legs are mounted to the body portion by flexible couplings which permit the legs to engage the supporting surface so that they move randomly, during movement of the vehicle, to simulate a crawling action. A cockpit provided on the rear portion of the body is covered by a transparent shield and provided with indicia to define the control quarters of a mechanical spider device.