Metal working – Means to assemble or disassemble – Including work conveyer
Patent
1987-09-24
1989-09-26
Goldberg, Howard N.
Metal working
Means to assemble or disassemble
Including work conveyer
29739, 29832, H05K 1304
Patent
active
048689777
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a working apparatus provided with carriers which hold works on a working line and transport them and with work heads which apply a predetermined operation at a predetermined position on the work transported to a work station on the working line.
Especially, the present invention is suitable for apparatus for automatically mounting electronic parts, such as a chip resistor or a chip laminated capacitor, on a substrate constituting an electronic circuit.
The present invention provides a working apparatus of good working efficiency, which reduces the leading time of moving the work to the work station and discharging it therefrom, thereby theoretically enabling the loading time to be zero. Especially, the present invention aims at a remarkable improvement in the work efficiency at the working apparatus, i.e. working time per one week.
BACKGROUND ART
As a conventional working apparatus of this kind, there is one as shown in FIG. 10.
The conventional apparatus relates to an automatic part mounting apparatus which picks up by a work head 51 an electronic part disposed on a part feed unit 50 and transports it into a work on a working line 52. More especially onto a substrate 53, thereby mounting the electronic part in a predetermined position on the substrate 53. The work head 51 moves in two horizontal directions X and Y to enable it to mount the electronic part on the substrate 53.
Further, the subtrate 53 is constructed so as to be positioned by a positioning means 55 in a predetermined stopped position at a work station 54 on the working line 52 to thereby be subjected to the mounting operation. The substrate 53 on which a necessary number of electronic parts are mounted is then moved on to a discharge position 56. Almost at the same time, the next substrate 53 at a stand-by position 57 is transported to the work station 54 and an electronic part is mounted similarly on the substrate 53. In addition, reference numeral 58 designates a stopper for stopping the next substrate 53 in the stand-by position 57.
The aforesaid conventional apparatus takes a relatively long loading time to move the substrate 53 on which the mounting operation has been completed from the work station 54 and to move a new substrate 53 thereto, e.g. such as several seconds to about 5 seconds.
Accordingly, when the number of parts to be mounted on one substrate is small, a loss in the loading time seriously affects work efficiency and decreases it considerably.
In the graph in FIG. 9 the abscissa represents the number of parts mounted on one substrate and the ordinate represents the number of parts mounted in 400 minutes of operating time. The solid line shows the work efficiency of the conventional apparatus while the dot-dash line shows the work efficiency of apparatus embodying this invention. The aforesaid problem can be apparently seen from this graph.
SUMMARY OF THE INVENTION
The present invention has been designed to eliminate the defect in conventional apparatus and is characterized in that a working apparatus which is provided with carriers for holding works on a working line and discharging the works and with work heads each applying a predetermined operation on a predetermined position on the work transported to a work station on the working line, is constructed as follows:
A work head is constructed to apply the predetermined operation at the predetermined position on a work and moves in a different direction from the moving direction of the work at the work station. The work and work head may be moved in two directions in the horizontal plane, namely X and Y directions, that is, the work in the direction X and the work head in the direction Y.
A head driving means for moving the work head and positioning the point of operation in the direction Y is provided.
Plural carriers are provided for holding the works on the working line and transporting them. The usual, two first and second carriers may be provided.
The two carriers are moved along the working line sequentially to
REFERENCES:
patent: 4202092 (1980-05-01), Shibasaki et al.
patent: 4231153 (1980-11-01), Browne
111 Werkstattstechnik, vol. 68, No. 11 (1979.11).
Supplementary European Search Report.
Hata Kanji
Itemadani Eiji
Maruyama Masahiro
Uchida Yoshihisa
Goldberg Howard N.
Matsushita Electric - Industrial Co., Ltd.
Ross Taylor J.
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