Abstract: A transport vehicle system includes a transport vehicle to travel along a track, a controller to control the transport vehicle, and a power supply provided at each of a plurality of sections of the track. Each of the power supplies includes a sensor to monitor a state of the power supply and a communicator to transmit the monitoring result by the monitor to the controller. The controller is configured or programmed to control the transport vehicle in accordance with the monitoring result.

Abstract: An object of the present invention is to provide a liquid droplet ejection head and a liquid droplet ejection apparatus in which viscosity resistance of a liquid to be ejected is reduced on an ejection side of a nozzle to prevent pointed-end ejection and to improve accuracy of an ejection angle. This object is achieved by the following. That is, a channel 28 having a volume to be changed by a pressure generation element and a nozzle 23 communicating with the channel 28 are included. The inside of the nozzle 23 has a conical portion 23a with a diameter becoming gradually smaller toward an outside, and a cylindrical portion 23b continuous with the conical portion 23a and communicating with the outside. A connecting part of the conical portion 23a to the cylindrical portion 23b has the same opening cross-sectional shape as a connecting part of the cylindrical portion 23b to the conical portion 23a.

Abstract: An object of the present invention is to provide a liquid droplet ejection head and a liquid droplet ejection apparatus in which viscosity resistance of a liquid to be ejected is reduced on an ejection side of a nozzle to prevent pointed-end ejection and to improve accuracy of an ejection angle. This object is achieved by the following. That is, a channel 28 having a volume to be changed by a pressure generation element and a nozzle 23 communicating with the channel 28 are included. The inside of the nozzle 23 has a conical portion 23a with a diameter becoming gradually smaller toward an outside, and a cylindrical portion 23b continuous with the conical portion 23a and communicating with the outside. A connecting part of the conical portion 23a to the cylindrical portion 23b has the same opening cross-sectional shape as a connecting part of the cylindrical portion 23b to the conical portion 23a.