Patent ID: 9001201
Filing Date: 2015-04-07
Classification: H05K

Abstract:
1. A component mounting apparatus that picks up components from a component feeding unit by a mounting head, transferring and mounting the component on a substrate, the apparatus comprising: a substrate conveyance mechanism that conveys the substrate in a first direction, positioning and retaining the substrate at a component mounting operation position and a head transfer mechanism that transfers the mounting head in the first direction and a second direction orthogonal to the first direction by a first transfer mechanism and a second transfer mechanism, thereby moving the respective mounting heads between the substrate conveyance mechanism and the component feeding unit disposed beside the substrate conveyance mechanism in the second direction thereof; an imaging unit that includes a light projection unit for projecting a belt-like inspection beam and a plurality of line sensor cameras which receive the inspection beam and which output the beam as image data representing a state of a lower end of a pickup nozzle attached to the mounting head and that are configured such that the light projection unit and the plurality of line sensor cameras are placed opposite to each other with a transfer pathway of the mounting head interposed therebetween and outside a transfer stroke of the mounting head in the first direction thereof; optical systems that are provided for the plurality of line sensor cameras respectively and have focusing points set in correspondence with any of head transfer range segments which have been determined by dividing the transfer stroke in the first direction into a plurality of pieces, and an image selection processing unit that selectively captures image data output from the plurality of line sensor cameras; a transfer pathway calculation unit that derives, in each of component-mounting rounds, from mounting program data targeted for the substrate the transfer pathway of the mounting head in a component-mounting round during which the mounting head is moved back and forth between the component feeding unit and the substrate conveyance mechanism; an imaging control unit that controls the image selection processing unit on the basis of data pertaining to the derived transfer pathway, thereby selecting and capturing image data output from the line sensor cameras assigned to the head transfer range segments that the transfer pathway of the mounting head cross during each of the component-mounting rounds; and a determination processing unit that determines from the selectively captured image data whether or not a component exists on the lower end of the pickup nozzle.