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US 5,628,107 AGranted
Electronic parts-mounting apparatus
AssigneeSanyo Electric Co., Ltd.
InventorsShuji Nushiyama, Yoshinori Kano, Shigeru Kageyama
Life of this patent
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AssigneeSanyo Electric Co., Ltd.
InventorsShuji Nushiyama, Yoshinori Kano, Shigeru Kageyama
Estimating the term…
An electronic parts-mounting apparatus includes an index unit which has an output shaft and is connected to a reduction gear for being driven thereby. A rotatable table is connected to the index unit and driven thereby into intermittent rotation. At least one camshaft is connected to the output shaft of the index unit. At least one cam rigidly mounted on the at least one camshaft is in contact with at least one cam follower associated therewith. The output shaft of the index unit is caused to rotate at a uniform rotational speed in which one rotation thereof corresponds to a plurality of repetition periods of intermittent rotation of the rotatable table. The at least one cam has a cam profile formed such that one rotation of the at least one cam causes a plurality of repetition periods of operation of the at least one cam follower in contact therewith, and at the same time each of the plurality of repetition periods of the operation of the at least one cam follower is identical to each of the plurality of repetition periods of the intermittent rotation of the rotatable table.
An electronic parts-mounting apparatus including an index unit which has an output shaft and is connected to a reduction gear for being driven thereby, a rotatable table connected to said index unit for intermittent rotation, at least one camshaft connected to said output shaft of said index unit for uniform rotation, at least one cam rigidly mounted on said at least one camshaft, and at least one cam follower in contact with said at least one cam associated therewith, said output shaft of said index unit being caused to rotate at a uniform rotational speed in which one rotation thereof corresponds to a plurality of repetition periods of intermittent rotation of said rotatable table,
Dependencies are inferred from the claim text.
No related US applications are recorded in the indexed filing history.
Incorporating a pick-up tool: having multiple pick-up tools
Means to fasten electrical component to wiring board, base, or substrate: chip component
Means to fasten electrical component to wiring board, base, or substrate: multilead component
Means to assemble electrical device: means to apply vacuum directly to position or hold work part
Term ended 16 Jan 2016 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
This invention relates to an electronic parts-mounting apparatus including a rotatable table which carries mounting heads and intermittently rotates while enabling each mounting head to pick up an electronic part by sucking, carry the sucked electronic part, and mount the same on a circuit board, and lifting/lowering devices provided for the mounting heads for lifting and lowering the mounting heads to thereby enable each mounting head to suck or mount the electronic part during stoppage of the rotatable table, and more particularly to an improvement of a drive system of the apparatus.
2. Prior Art
The above and other objects, features, and advantages of the invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings.
FIG. 1 is a front elevation of an electronic parts-mounting apparatus according to one embodiment of the invention;
FIG. 2 is a plan view of the electronic parts-mounting apparatus;
The invention will now be described in detail with reference to drawings showing an embodiment thereof.
Referring first to FIGS. 1 and 2, there is shown an electronic parts-mounting apparatus 1 according to the embodiment of the invention, which includes a main unit 2, a feeding section 3 for feeding electronic parts A, and a mounting section 4 for mounting the electronic parts A on a circuit board B, with the feeding section 3 and the mounting section 4 being arranged on opposite sides of the main unit 2. The main unit 2 is comprised of an index unit 11 forming a main part of the driving system of the apparatus, a rotatable table 12 connected thereto, and a plurality of (twelve) mounting heads 13 arranged on the outer periphery of the rotatable table 12. The rotatable 12 is intermittently rotated in angular increments corresponding to the number of the mounting heads 13. With intermittent rotation of the rotatable table 12, the mounting heads 13 are each brought into a sucking position in which the mounting head 13 faces the feeding section 3 and a mounting position in which the mounting head 13 faces the mounting section 4, in a predetermined sequence, whereby each mounting head 13 sucks an electronic part A supplied from the feeding section 3, carries the same to the mounting section 4 through rotation of the rotatable table 12, and enables the same to be mounted on the circuit board B introduced into the mounting section 4.
The feeding section 3 has parts feeders 21 corresponding in number to the number of kinds of electronic parts A to be mounted on the circuit board B. The parts feeders 21 are removably mounted in parallel with each other on a feed table 23 which is slidably guided by a pair of guide rails 22, 22. A ball screw 24 extends through the feed table 23 in the direction of sliding thereof, whereby the feed table 23 is moved forward and backward by normal and reverse rotations of a feed motor 25 connected to one end of the ball screw 24, to selectively bring a selected one of the parts feeders 21 to a position in which the selected parts feeder 21 faces the mounting head 13 in the sucking position. Each parts feeder 21 is comprised of a tape reel 26 around which a carrier tape C is wound, a tape feeder 27 which unwinds the carrier tape C off the tape reel 26, and a cover tape reel 28 which rolls a cover tape off the carrier tape C.