Metal working – Method of mechanical manufacture – With testing or indicating
Reexamination Certificate
2002-05-02
2004-01-27
Vidovich, Gregory (Department: 3726)
Metal working
Method of mechanical manufacture
With testing or indicating
C029S407100, C029S740000
Reexamination Certificate
active
06681468
ABSTRACT:
TECHNICAL FIELD
The present invention relates to an apparatus and a method for mounting components, whereby a plurality of components a replaced onto a mounting base object (a body to be mounted) such as a board or the like after a component supplied to a component supply position of a component supplying member, for supplying components one by one to the component supply position, is held by a component holding member.
BACKGROUND ART
Component mounting apparatuses of various structures have been developed to respond to a need for high-speed mounting in recent years. For example, one of apparatuses proposed has a plurality of component supply cassettes for storing a plurality of components in component supply tapes and supplying respective components to component supply positions, so that components supplied to the component supply positions are sucked and held simultaneously by a plurality of suction nozzles and then placed onto a board.
Meanwhile, a deflection resulting from a machining accuracy is inherent in a shaft of a nozzle as shown in FIG.
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. Even when each nozzle is positionally adjusted to an original position relative to a reference position along a reference center axis of a respective nozzle shaft (one-dotted chain line in the drawing), the nozzle has increased positional displacement, at a nozzle leading end, from the reference center axis of the shaft between the original position and a placing position lowered from the original position when the shaft is moved up and down by an actuator. In order for detecting such positional displacement and thereby improving a component placing accuracy, a plurality of suction nozzles fitted to one head is recognized by a recognition camera in a state not sucking components and an amount of positional displacement of each of the plurality of suction nozzles is detected between an original position and a placing position moved down from the original position. Each suction nozzle is rotated about its axis on the basis of a detected amount of respective positional displacement to eliminate positional displacement. The plurality of suction nozzles can accordingly simultaneously suck and hold a plurality of components supplied to respective component supply positions by a plurality of component supply cassettes.
In the above structure, in the event that the detected positional displacement amount is too large to eliminate through rotation of a suction nozzle about its axis, the suction nozzle with the large amount of the positional displacement has a large positional displacement amount from a component supply position of a component supply cassette and thus cannot suck and hold a component even when the plurality of components supplied from the plurality of component cassettes are to be sucked and held simultaneously by the plurality of component suction nozzles. Moreover, if a component cannot be correctly sent to a component supply position of a component supply cassette because of a positional displacement of a carrier tape holding the component, which results from an attaching error of the carrier tape relative to the component supply cassette, the component cannot be sucked by a suction nozzle.
The present invention has for its object to provide an apparatus and a method for mounting components whereby components supplied from component supplying members can be simultaneously or continuously held by component holding members without being affected by a positional displacement of the component holding members relative to a head or a positional displacement of the component supplying members, and the like, with an aim to solve the above-described issues.
SUMMARY OF THE INVENTION
In order to accomplish the above object, the present invention is constituted as described hereinbelow.
According to a first aspect of the present invention, there is provided a component mounting apparatus in which each of plural components supplied to a component supply position of a component supplying member, for supplying the components, is held by a component holding member and then placed onto a mounting base object.
The component holding member is set to a head which is movable in mutually orthogonal first and second directions.
The component supplying member comprises a component supply driving device for moving the components one by one along the second direction to the component supply position, thereby moving the components one by one along the second direction to the component supply position by operating the component supply driving device.
The component mounting apparatus comprises a positional displacement detecting device for detecting a positional displacement, along the second direction, of the component holding member or the component held by the component holding member relative to a reference position of the component holding member.
Accordingly, a movement amount for moving the components one by one along the second direction to the component supply position is adjusted through driving control provided to the component supply driving device at the component supplying member, where a component is to be held by the component holding member, based on an amount of positional displacement along the second direction of the component holding member or the component held by the component holding member relative to the reference position of the component holding member. This amount is determined on basis of a detection result of the positional displacement detecting device, with a positional displacement amount being taken into account, so that a component supplied to the component supply position, with the movement amount adjusted at the component supplying member, is held by the component holding member displaced by the positional displacement amount.
According to a second aspect of the present invention, there is provided a component mounting apparatus in which components supplied to corresponding respective component supply positions of component supplying members, for respectively supplying the components, are respectively held by component holding members and then placed onto a mounting base object.
The component holding members are set to one head which is movable in mutually orthogonal first and second directions.
Each of the component supplying members comprises a component supply driving device for moving the components one by one along the second direction to the component supply positions, thereby moving the components one by one along the second direction to the component supply positions by operating the component supply driving device.
The component mounting apparatus comprises a positional displacement detecting device for detecting a positional displacement, along the second direction, of each of the component holding members or each component held by a respective component holding member relative to a reference position of each of the component holding members.
Accordingly, a movement amount for moving the components one by one along the second direction to the component supply positions is adjusted through driving control provided to each of the component supply driving devices at each of the component supplying members, where a component is to be held by a respective component holding member, based on an amount of positional displacement along the second direction of each of the component holding members or each component held by a respective component holding member relative to the reference position of each of the component holding members. This amount is determined on the basis of a detection result of the positional displacement detecting device, with a positional displacement amount being taken into account, so that respective components supplied to respective component supply positions, with movement amounts adjusted at respective component supplying members, are held by respective component holding members displaced by the respective positional displacement amounts.
According to a third aspect of the present invention, there is provided a component mounting apparatus according to the second aspect, wherein
Kabeshita Akira
Mimura Naoto
Obara Hirofumi
Okuda Osamu
Uchiyama Hiroshi
Matsushita Electric - Industrial Co., Ltd.
Omgba Essama
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