Component mounting machine and safety device thereof

A component mounting machine comprising:

• a component feeder unit having a component accommodating part for accommodating components, a feed-out part for feeding the accommodated components one by one, and a component takeout part operable to remove the fed components;
• a component feed section for supporting a plurality of the component feeder units;
• a nozzle unit for removing the component from the component feed section and for mounting the component onto an object to be mounted, wherein the component accommodating part is set outside a movable range of the nozzle unit;
• a robot unit for driving the nozzle unit;
• a control unit for controlling operations of the nozzle unit and robot unit;
• an opening/closing cover for isolating the component takeout part and the component accommodating part from each other in a closed state, the opening/closing cover comprising an upper cover for swinging on a fulcrum of a machine upper portion, a sub-cover for swinging on a fulcrum of a front end portion of the upper cover, and a guide mechanism for regulating operation of the sub-cover;
• an opening/closing cover sensor for detecting the closed state of the opening/closing cover;
• and
• a detection sensor for detecting when a foreign object has entered the component feed section;
• wherein the guide mechanism regulates movement of the sub-cover when the sub-cover moves together with the upper cover so as not to interfere the sub-cover with a movable part of the nozzle unit, and when the component feeder unit is supported on the component feed section and the sub-cover is moved to the closed position, the component takeout part of the component feeder unit is covered with the sub-cover while the component accommodating part of the component feeder is exposed, thus isolating the movable part of the nozzle unit from the component accommodating part of the component feeder unit so that there is no space through which the foreign object can enter the movable part of the nozzle unit;
• wherein the control unit stops an operation of the component mounting machine when the opening/closing cover sensor detects that the opening/closing cover is not in the closed state or when the detection sensor detects that the foreign object has entered the component feed section;
• and
• wherein the detection sensor comprises a sensor for detecting that the foreign object has entered the component feed section by tilting a bar-shaped detection member down by the foreign object, the detection member being operable to be tilted down with the component feeder unit being supported on the component feed section, and being operable to be raised with the component feeder unit being removed so as to detect the entered foreign object.