Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Presses or press platen structures – per se
Patent
1998-01-08
2000-02-22
Osele, Mark A.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Presses or press platen structures, per se
156344, 221 25, 221 79, 221 87, 226 8, 414411, 414416, B65H 528
Patent
active
060268859
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an electronic component feeder attached for use in an electronic component mounting apparatus.
BACKGROUND ART
A conventional electronic component feeder is explained referring to FIGS. 9 to 15.
Such an electronic component feeder is commonly designed for supplying electronic components 1 from an electronic component carrying tape A shown in FIG. 9. This is not only because components 1 can be aligned in a row which is advantageous for continuous supply but also because such tape allows easy conveying and handling by an operator.
The electronic component carrying tape A shown in FIG. 9 includes a holder tape 3 having a row of storage recesses 2 provided therein at equal intervals in a lengthwise direction, the electronic components 1 stored in their respective storage recesses 2, a top tape 4 attached to the upper surface of the holder tape 3 for protecting and preventing electronic components 1 from dropping off, and a row of sprocket apertures 5 provided at equal intervals in a lengthwise direction.
For supplying the electronic components 1 from the electronic component carrying tape A, it is necessary to repeat a cycle of actions comprising three steps; peeling off the top tape 4, holding the electronic component 1 with a suction nozzle, and advancing the electronic component carrying tape A by a distance equal to the distance between any two adjacent storage recesses 2.
Such cycle of actions carried out in a conventional electronic component feeder installed in an electronic component mounting apparatus will now be described in more detail referring to FIGS. 10 to 15.
Motions of each element of the component feeder in accordance with actions of the suction nozzle will be described according to the timing chart shown in FIG. 13 as well as referring to the front view in FIG. 10, the rear view in FIG. 11, and the plan and cross sectional views of a tip of the component feeder in FIG. 12.
As shown in FIG. 13, each element repeats component feeding actions in accordance with a cycle of actions consisting of descending, attracting components by suction, and ascending of the suction nozzle in the electronic component mounting apparatus.
Referring to FIGS. 10 to 12, in response to the actions of the suction nozzle, an actuator lever (not shown) comes into contact with a feed lever 6 (denoted by oblique lines in FIG. 10) which then turns down clockwise about a first pivot center 16 as shown in FIG. 10. As the feed lever 6 has turned down a given distance, it strikes a take-up lever 11 which then turns up clockwise as shown in FIG. 10.
One cycle of actions the feed lever 6 which consists of descending, pausing, and ascending is converted by a link 7 to the forward and backward turning motion of a wheel driving lever 18 about a second pivot center 19.
Through a combination of a first pin 20 fitted into a hole 24a of a shutter 24 mounted to the wheel driving lever 18, second pins 22, 22 mounted to the tape guide 12, and a slot 23 provided in the shutter 24 for engagement with and guidance of the two second pins 22, the forward and backward turning action of the wheel driving lever 18 is converted to an intermittent linear reciprocating movement of the shutter 24. The shutter 24 has a distal end 24b bent down as best shown in FIGS. 12A and 12B so that it can reciprocate intermittently on the tape guide 12 without covering the entirety of a suction window 25 provided at a component pick-up position of the tape guide 12 but holding a central position of the electronic component 1 exposed to the suction window 25. The distal end 24b of the shutter 24 remains retracted in a gap 24a defined in the tape guide 12 when the suction window 25 is not closed with the shutter 24.
Accordingly, as shown in FIGS. 11 to 13, when the feed lever 6 is started to turn downwardly, the shutter 24 moves backward to the right-hand side in FIG. 11, allowing the distal end 24b thereof to retreat into the gap 24a. As the actuator lever in the electronic component mounting apparatus stops at
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Hirai Wataru
Ida Akiko
Makino Youichi
Mogi Seiichi
Sakurai Kunio
Matsushita Electric - Industrial Co., Ltd.
Osele Mark A.
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