Position-detecting apparatus

A position-detecting apparatus comprising:

• a plurality of pressure-detecting switches each having a detecting nozzle for jetting a fluid to an object, said fluid being supplied from a fluid supply source to a detecting passage, and controlling a flow rate of a fluid supplied from said fluid supply source to a comparing passage, thereby detecting whether or not a pressure in said detecting passage arrives at a prescribed pressure in said comparing passage, wherein each of said pressure-detecting switches comprises a pair of side sections;
• a terminal board box having at least one side section for connecting to one of said pair of side sections of one of said pressure-detecting switches;
• and
• a fixing mechanism connecting said pressure-detecting switches to one another by using fixing members disposed in side sections of respective adjacent pressure-detecting switches, said side sections of the respective adjacent pressure-detecting switches being connected to one another,
• wherein said respective adjacent pressure-detecting switches have first electrical connectors for electric wiring disposed respectively on said side sections of the respective adjacent pressure-detecting switches, said first electrical connectors comprising terminal pins and pin-receiving sockets coming into contact and being electrically connected to one another when said side sections of the respective adjacent pressure-detecting switches are connected to one another,
• wherein said terminal board box has at least one second electrical connector for electric wiring disposed on said at least one side section thereof, said second electrical connector coming into contact and being electrically connected to one of said first electrical connectors when said at least one side section is connected to one of said pair of side sections of one of said pressure-detecting switches.