Chip-type electronic part storage casing and supply cassette usi

Details Chip-type electronic part storage casing and supply cassette usi Chip-type electronic part storage casing and supply cassette usi

1995-10-13

1998-05-19

Hunson, Gregory L.

Dispensing

With casing or support

For bottom discharge dispenser supported on horizontal surface

222325, B67D 506

Patent

active

057526281

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

This invention relates to a chip-type electronic part storage casing for storing chip-type electronic parts in a loose condition and for supplying these electronic parts one by one, the storage casing being used in combination with an electronic part-mounting apparatus for packaging the chip-type electronic parts on a printed board. The invention also relates to a supply cassette using such a storage casing.


BACKGROUND OF THE INVENTION

FIGS. 15(a) to 15(c) are perspective views showing the configuration of conventional chip-type electronic parts. FIG. 15(a) shows the chip-type electronic part 35 in the form of a capacitor having an electrode 35a; FIG. 15(b) shows the chip-type electronic part 36 in the form of a resistor having an electrode 36a; and FIG. 15(c) shows the chip-type electronic part 37 in the form of a resistor having an electrode 37a.
As a supply mode of supplying these chip-type electronic parts 35 to 37 (hereinafter referred to as "chip-type electronic parts 35") by a supply device, there have heretofore been used methods using taping, a magazine, a tray and so on. Among these, the taping system achieves a high reliability at the time of mounting, and has therefore been the system of choice. However, the mounting speed of a chip-type electronic part-mounting apparatus has continued to increase, while the amount of storage for the chip-type electronic parts by the taping system is small. Therefore the frequency of tape exchanges has increased. For this reason, attention has now been drawn to a loose supply mode providing a large storage capacity, and a chip-type electronic part storage casing capable of storing chip-type electronic parts 35 in a loose condition has been standardized as "EIAJ-ET7201".
FIG. 16 shows the above standardized chip-type electronic part storage casing 40. In this chip-type electronic part storage casing 40, a leaf spring 42 is mounted through a slide structure for closing an opening 43 to seal the chip-type electronic parts 35. A projection 41 for opening and closing the leaf spring 42 is mounted on a distal end of the leaf spring 42. The chip-type electronic part storage casing 40 of this construction is attached to an electronic part supply device (not shown) through slide grooves 44, with the opening 43 directed downwardly, and the chip-type electronic parts 35 successively drop to be transferred into the electronic part supply device.
The chip-type electronic part storage casings 40 of this construction store different kinds of chip-type electronic parts 35, respectively, and are attached to respective electronic part supply devices, and in this condition the plurality of storage casings 40 are mounted parallel on the electronic part-mounting apparatus, and are used in this condition. The electronic part supply device, to which the chip-type electronic part storage casing 40 storing the selected kind of chip-type electronic parts 35 is attached, is moved laterally, so that the parts can be taken out of a predetermined supply position in the electronic part-mounting apparatus.
With the above conventional construction, however, the frequency of lateral movement of the electronic part supply device increases with the increase of the mounting speed of the electronic part-mounting apparatus, and besides, since the acceleration of the movement reaches 2.about.3G, there occurs a conspicuous phenomenon in which each time the electronic part supply device moves laterally, upper ones of the chip-type electronic parts 35 remaining in the chip-type electronic part storage casing 40, are scattered to impinge on an inner surface of the chip-type electronic part storage casing 40, and when this occurs repeatedly, there has been encountered a problem that the electrodes 35a of the chip-type electronic parts 35 rub each other, or are rubbed by the inner surface of the chip-type electronic part storage casing 40, so that dust is produced.
If this dust deposits on other portions of the chip-type electronic part 35 than the electrode 35a, there arise prob

REFERENCES:
patent: 2525225 (1950-10-01), Karlovich
patent: 4548342 (1985-10-01), Fisher

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