Method and apparatus for mounting electronic parts
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMasahiro Maruyama, Eiji Itemadani, Kazuhiro Mori, Mikio Hasegawa
Life of this patent
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Abstract
The present invention relates to a method and apparatus for mounting an electronic part (11) on a circuit board (28). When the part is mounted, a distance between the under surface of a part maintaining section (12) and the circuit board (38) is measured. Determination that the electronic part (11) is normally mounted on the circuit board (28) is made by comparing the measured distance with the thickness of the electronic part (11) measured in advance.
Claims12
A method for mounting an electronic part on a circuit board, comprising the steps of:
- measuring a distance between (a) the under surface of a part maintaining section for maintaining said electronic part and (b) said circuit board by a distance measuring means attached to said part maintaining section;
- and
- determining a normal mounting of said electronic part by comparing the measured distance with a thickness of said electronic part measured in advance.
An apparatus for mounting an electronic part on a circuit board, comprising:
- a sliding shaft having a part maintaining section at an end thereof;
- a motor for moving said sliding shaft upwardly and downwardly;
- a driver unit for moving said sliding shaft within a horizontal plane;
- distance measuring means for measuring a distance between said circuit board and the under surface of said part maintaining section when said electronic part is mounted on said circuit board, said distance measuring means comprising a differential transformer attached to said sliding shaft and having a needle movable upwardly and downwardly and a solenoid for maintaining said needle at an upper portion;
- and
- determining means for determining a normal mounting of said electronic part by comparing the measured distance with a thickness of said electronic part measured in advance.
An apparatus for mounting an electronic part on a circuit board, comprising:
- a sliding shaft having a part maintaining section at an end thereof;
- a motor for moving said sliding shaft upwardly and downwardly, said motor comprising a position sensor for outputting a position signal for controlling said motor;
- a drive unit for moving said sliding shaft within a horizontal plane;
- distance measuring means for measuring a distance between said circuit board and the under surface of said part maintaining section by calculating a dropping amount of said part maintaining section on the basis of said position signal of said position sensor when said electronic part is mounted on said circuit board;
- and
- determining means for determining a normal mounting of said part by comparing the measured distance with a thickness of said electronic part measured in advance.
An apparatus as claimed 5, wherein said motor comprises a linear electric motor.
Dependencies are inferred from the claim text.