Source: https://patents.google.com/patent/US4619043A/en
Timestamp: 2020-05-28 08:29:55
Document Index: 631185371

Matched Legal Cases: ['art 20', 'arts 20', 'arts 20', 'art 20', 'art 20', 'art 20', 'art 20', 'art 20', 'arts 20', 'arts 20', 'arts 20', 'arts 354', 'arts 354', 'art 20', 'art 20', 'art 20', 'art 20', 'art 20', 'art 20', 'art 20']

US4619043A - Apparatus and method for mounting chip type electronic parts - Google Patents
Apparatus and method for mounting chip type electronic parts Download PDF
US4619043A
US4619043A US06/591,190 US59119084A US4619043A US 4619043 A US4619043 A US 4619043A US 59119084 A US59119084 A US 59119084A US 4619043 A US4619043 A US 4619043A
US06/591,190
1983-05-02 Priority to JP58-76205 priority Critical
1983-05-02 Priority to JP58076205A priority patent/JPH0218598B2/ja
1983-05-19 Priority to JP58-73690[U]JPX priority
1983-05-19 Priority to JP7369083U priority patent/JPH0215357Y2/ja
1983-05-19 Priority to JP1983073691U priority patent/JPH021863Y2/ja
1983-06-02 Priority to JP1983082970U priority patent/JPH029600Y2/ja
1983-06-06 Priority to JP8501983U priority patent/JPH0211836Y2/ja
1983-06-13 Priority to JP1983089175U priority patent/JPH0217519Y2/ja
1983-06-23 Priority to JP9695683U priority patent/JPS605200U/ja
1984-03-19 Application filed by TDK Corp filed Critical TDK Corp
1984-04-30 Assigned to TDK CORPORATION, TOKYO, reassignment TDK CORPORATION, TOKYO, ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SAITO, KENICHI, TAGUCHI, YOSHINOBU, TAKAHASHI, TETSUO
1986-10-28 Publication of US4619043A publication Critical patent/US4619043A/en
An apparatus and method for mounting chip type electronic parts, in which the parts can be smoothly, reliably and accurately mounted on, for example, a printed circuit board. The apparatus for mounting the chip type parts comprises means for conveying the part to be mounted, means for supplying the part onto the conveying means, means for receiving the part from the conveying means and for mounting the same onto a printed circuit board for example, and also means for positioning the part upon the conveying means before transfer of the part to the receiving and mounting means. The method for mounting a chip type part according to the present invention comprises the steps of supplying the part onto means for conveying the same to be mounted, positioning of the part on the conveying means, and then removing the part off the conveying means and mounting the same.
The present invention generally relates to an apparatus and method for mounting chip type electronic parts, one by one, onto a printed circuit board. More particularly, the present invention is directed to an apparatus and method for mounting chip type electronic parts having no lead wires upon a printed circuit board, one by one. The present invention is also directed to a pallet for conveying the chip type electronic parts, especially such parts without lead wires, to be mounted on a printed circuit board.
Accordingly, it is an object of the present invention to provide an apparatus and method for mounting chip type electronic parts, in which the space required for installation is minimized by running a pallet carrying the chip type electronic part for mounting, along a vertical plane.
These and other features of the present invention, will become apparent from the following description with reference to the accompanying drawings, in which one embodiment of an apparatus for mounting chip type electronic parts is illustrated.
The following description of a preferred embodiment of the present invention is merely exemplary, and is not intended to limit the scope thereof in any way.
Means 11 for receiving the chip type electronic parts and mounting the same upon a printed circuit board, for example, is provided adjacent to sprocket 1B on the conveying means 3. This receiving and mounting means is formed with mounting heads 13 radially disposed on an indexing disc 12, at isogonal intervals (45°), as viewed in FIG. 2. The indexing disc 12 is disposed to rotate by 45° in each interval. The midpoint of a circular arc along sprocket 1B along which the pallet 4 runs, represents the position at which a chip type electronic part 20 is shifted onto the mounting head 13 from a respective pallet 4.
The pallet 4 is illustrated in detail in FIGS. 3-6. A bedplate 31 is provided at the central portion of a pallet base 30 that is mounted on the chain 2, and a pair of round retaining bars 32A, 32B are movably provided thereon. Both ends of the round retaining bars 32A, 32B are tapered. Both ends of the pallet base 30 form a high-stepped convexity 33, while curved compression leaf springs 34 are each provided between the inside of the high-stepped convexity 33 and the respective round retaining bars 32A, 32B, as seen in FIGS. 3 and 4. Therefore, both of the round retaining bars 32A, 32B are urged in a close direction towards one another.
MEANS FOR POSITIONING THE ELECTRONIC PARTS
FIGS. 7-9 illustrate the means 21 for positioning the respective chip type electronic parts 20 upon the respective pallets 4. A supporting member 40 is provided on the front of body frame 8, and disposed in such a manner to perpendicularly traverse over the horizontal runway 5 on which the pallets 4 run in a substantially horizontal, straight line. A pair of slide blocks 41A, 41B are disposed on an underside of supporting member 40 as illustrated in FIG. 7, while positioning blocks 43, each having a positioning pin 42, are each disposed on a respective slide block 41A, 41B and disposed to be slidable in a substantially horizontal direction.
MEANS FOR TRANSFORMING ELECTRONIC PARTS HAVING LEADS
FIGS. 10-12 illustrate means 22 for transforming particular kinds of chip type electronic parts 20A that have leads such as lead electrodes 20B. As illustrated in FIGS. 10 and 11, a support member 50 is affixed to a front of the body frame 8, and projects over the horizontal path 5 of the respective pallets 4. A slide block 51 is provided within support member 50 and disposed to be vertically slidable therein. A push rod 53 is supported to be vertically slidable on slide block 51 through a mounting member 52, the push rod 53 being urged in a downward direction by compression spring 54.
MEANS FOR DETECTING PRESENCE OF CHIP TYPE ELECTRONIC PARTS
FIGS. 13 and 14 illustrate means 23 for detecting whether or not a chip type electronic part 20 is present on a respective pallet 4. Referring to these figures, supporting member 70 is fixed on the front of body frame 8 facing the horizontal path or runway 5 for the pallets 4, with a slide block 71 disposed against supporting member 70 and adapted to be slidable in a substantially horizontal direction, such as indicated by arrow E in FIG. 13. A detecting rod 73 is supported on the slide block 71 through a mounting member 72, to be slidable in a horizontal direction too. Furthermore, the detecting rod 73 is urged in a forward direction towards the pallet 4, by a compression spring 74.
MEANS FOR RECEIVING AND MOUNTING THE ELECTRONIC PARTS
As illustrated in FIGS. 15 and 16, means 11 for receiving a chip type electronic part and mounting the same upon a printed circuit board, for example, comprises an intermittent rotating shaft 90 projecting from the front of the body frame 8, an inner cylindrical shaft 131 fitted around the intermittent rotating shaft 90, and an outer cylindrical shaft 132 fitted around the inner cylindrical shaft 132. An indexing disc 12 is engaged with these shafts. Mounting heads 13 are radially provided on the indexing disc 12 at equal-angle intervals, such as at 45° intervals as illustrated in FIGS. 2 and 17. The inner cylindrical shaft 131 jointly rotates with the intermittent rotating shaft 90, while the outer cylindrical shaft 132 is affixed on the body frame 8.
In the operation of the means 11 for receiving and mounting the individual chip type electronic parts, the indexing disc 12 is rotated at 45° intervals according to the rotation of the intermittent rotating shaft 90. Then, when a mounting head 13 stops at an intermediate point of the portion where pallet 4 runs in a circular arc around sprocket 1B, namely at the point P illustrated in FIGS. 2 and 17 where the chip type electronic part 20 is shifted from the pallet 4 onto mounting head 13, the roller 101 on the rear end of the mounting head 13 at that point P is engaged between the projections 138 and 139 of the actuating slider 102A on the right side position of the supporting plate. In this position, the through-slide member 95 advances in a rightward direction according to a rightward move of actuating slider 102A caused by actuating roller 136A, thus pressing the suction pin 96 onto the chip type electronic part 20 on the pallet 4. In this case, excessive projection of the suction pin 96 is absorbed by the compression spring 99. After suction of the chip type electronic part 20 onto the pin 96 of the mounting head 13, the through-slide member 95 of the mounting head 13 at the point P is reset by the return spring 100.
The mounting head 13 draws the chip type electronic part 20 off the pallet 4 with the suction pin 96, passing point Q according to the incremental 45° rotation of the indexing disc 12, and then reaching point R. Means 14 for orienting the chip type electronic part disposed upon mounting head 13, to be described infra, is disposed opposite the mounting head 13 positioned at point R.
MEANS FOR SHIFTING THE ELECTRONIC PARTS ONTO THE RECEIVING AND MOUNTING MEANS
FIGS. 18 and 19 illustrate means 24 for shifting individual chip type electronic parts 20 from the respective pallets 4 onto the mounting heads 13 of the receiving and mounting means 11. Referring to the figures, a pair of mullers 111A, 111B with fairly sharp tips are affixed onto respective slide blocks 112A, 112B in such a manner that a runway 110 along which the respective pallets 4 pass around sprocket 1B, will pass between both sharp tips of the respective mullers 111A, 111B. The slide blocks 112A, 112B are slidingly engaged with a supporting member 113, which is in turn engaged with the body frame 8. Slide blocks 112A, 112B are adapted to slide in a substantially horizontal direction, in other words in the direction indicated by arrow H in FIG. 18.
MEANS FOR ORIENTING THE CHIP TYPE ELECTRONIC PART
FIGS. 20-26 illustrate means 14 for positioning and orienting or reorienting the chip-type electronic parts 20 that are each disposed upon a respective mounting head 13 on the indexing disc 12 of the means 11 for receiving the electronic parts 20 and mounting the same upon a printed circuit board. As illustrated in the figures, a supporting frame 120 is disposed at a position opposite the position of the mounting head 13 at the point R (FIG. 20) on a top of the front of the body frame 8, with a pulse motor 121 being provided on the supporting frame 120. A rotating member 123 with the lower end thereof forming a regular, quadrangular column, is affixed onto a rotating shaft 122 of the motor 121, with a pair of gripping levers 124A, 124B being pivoted on a first face of the quadrangular column formed by the rotating member 123, these gripping levers being pivoted thereto at supporting points 125A, 125B, respectively.
Then, the horizontal gripping parts 354A, 354B, 354C, and 354D of the respective gripping levers 124A, 124B, 124C and 124D, are all closed, as indicated by arrow M in FIG. 24, in accordance with the ascending of actuating member 128. Then, positioning and/or orienting is carried out with the chip 20 being in the gripped state as illustrated in FIG. 25. Referring to this particular figure, orientation is carried out by the pulse motor 21 operating to actuate the rotating member 123, to rotate the respective gripping levers 124A-D, thus also rotating the respective gripping parts 354A-D, and thus rotating the chip type electronic part 20. For example, as illustrated in FIG. 25, the electronic part 20 may be rotated in direction N, as the occasion demands. The chip type electronic part 20 may be oriented in any particular direction, for example at a 90° rotation, 180° rotation, in either a clockwise or a counterclockwise direction, as the conditions demand. An angle of rotation can be set arbitrarily.
The mounting head 13 retaining the chip type electronic part 20 at the point P, then rotates in 45° intervals according to an intermittent rotation of the indexing disc 12, and reaches point R by passing point Q. At point R, the chip type electronic part 20 is oriented by the orienting means 14 as illustrated in FIG. 20, so that the center of the chip type electronic part 20 and the center of the suction pin 96 on the mounting head 13, will coincide with each other. This rotation also changes the orientation, where necessary, by rotating the chip type electronic part 20 at a predetermined angle.
1. A method for mounting chip type electronic parts having leads extending therefrom, comprising the steps of
supplying the part onto means for conveying the same to be mounted,
positioning the part on said conveying means,
detecting presence/absence of the part on said conveying means, after positioning of the same upon said conveying means,
removing the part off said conveying means and mounting the same, and
transforming the individual chip type part after the positioning step and before the detecting step, so that a tip of a lead thereof and a bottom surface of the electronic part are disposed in substantially the same plane.
orienting the part after removal from said conveying means and before mounting, so that the part is mounted with a particular orientation.
3. An apparatus for mounting a chip type part for electronic application to a printed circuit board, comprising
means for conveying the part to be mounted,
means for supplying the part onto said conveying means,
means for receiving the part from said conveying means and for mounting the same, and
means for positioning the part upon said conveying means before transferring the same to said receiving and mounting means, wherein
said conveying means comprise an endless belt having a portion running in a substantially horizontal plane and a portion passing through a substantially vertical direction, said belt adapted to carry a series of pallets for receiving the part from said supplying means;
said supplying means comprise at least one supply unit disposed on either side of the horizontal portion of said belt, and
said receiving and mounting means comprise at least one mounting head for receiving the part at a particular position from the pallet, and for mounting the same upon the printed circuit board.
4. The apparatus of claim 3, in which the pallet comprises a base and a hole formed within the base of the pallet, and said apparatus additionally comprising means for detecting presence/absence of the part upon a respective pallet, after the pallet passes by said positioning means, said detecting means comprising
a detecting rod,
a suction hole formed within said detecting rod and adapted to communicate with the hole formed within the base of the pallet, and
means coupled to said detecting rod for pressing said detecting rod against the pallet so that the respective holes of the pallet and rod communicate,
whereby when a part covers an opening of a hole within the base of the pallet, a negative pressure applied within the holes in communication is maintained, and
when a part does not cover the opening of the hole within the base of the pallet, a negative pressure produced within said suction hole in said suction rod is thereby dissipated.
the chip type electronic part has at least one lead extending therefrom, and
the apparatus additionally comprises means for transforming the chip type electronic part to be disposed on the respective pallet with the bottom of the part and the lead extending therefrom in substantially the same plane, said transforming means comprising
a slide block, and
a push rod affixed to said slide block and adapted to be substantially vertically slidable therewith, to depress a top of the chip type, electronic part retained on the pallet.
6. The apparatus of claim 1, in which said positioning means comprises
a pair of blocks adapted to slide in a substantially horizontal direction,
a pair of positioning pins, each pin disposed on a respective slide block, opposite one another, and
a member adapted to move in a substantially vertical direction and coupled to each of said slide blocks, so that when said member is raised, said blocks and pins extend towards one another in the substantially horizontal direction, to contact and position the part upon the pallet.
7. The apparatus of claim 4, in which the pallet comprises
a pair of bars movably disposed on the base and adapted to retain the part disposed thereon,
a pair of steps on said base, each step disposed on a respective side of said hole, and
means for urging the bars close to one another to retain the part on the pallet, said urging means comprising a pair of leaf springs, each leaf spring seated between a respective step and bar.
8. The apparatus of claim 1, in which said receiving and mounting means comprise
a rotatable shaft rotatably mounted in a frame of said apparatus and adapted to rotate at discrete intervals,
an indexing disc disposed upon said rotatable shaft,
a plurality of said mounting heads disposed at discrete radial intervals about said indexing disc, each mounting head comprising
a suction pin for drawing the part off a respective pallet, and
a through-slide member engaged with a respective suction pin, said receiving and mounting means additionally comprising
a support plate disposed on a rear side of said indexing disc and affixed to the frame of said apparatus, and
at least one actuating slider slidably disposed upon said support plate and adapted to actuate the through-slide member to extend said suction pin.
10. The apparatus of claim 1, additionally comprising
means for shifting the part from a respective pallet onto a respective mounting head of said receiving and mounting means, the pallet being formed with a pair of bars for retaining the part thereon and a suction hole adapted to be covered by the part retained on the respective pallet,
in which said shifting means comprise
a shifting suction rod,
a suction hole disposed within said shifting suction rod and adapted to communicate with the hole within the pallet, and
a pair of mullers, at least one of which being engaged with said suction rod, said mullers adapted to move towards one another and to move the pair of bars on the pallet apart, when said suction rod contacts the pallet and a vacuum suction is applied to the hole in the pallet through said suction hole in said suction rod.
11. The apparatus of claim 1, additionally comprising
means for orienting the part when the same is disposed upon said mounting head of said receiving and mounting means, which comprises
a rotatable member, and
at least one pair of gripping levers engaged with said rotatable member, said levers adapted to grip and rotate the part about said mounting head.
said orienting means additionally comprise a rotatable motor and shaft affixed to said rotatable member, and
a stopper engaged with said rotatable member and adapted to contact the top of the chip type electronic part retained by the pair of gripping levers.
said pair of gripping levers comprise a first lever having a pin positioned thereon, and a second lever having a complementary concavity for mating with said pin positioned on said first gripping lever.
14. A pallet for conveying a chip type part, comprising
a pair of retaining bars disposed on said base and adapted to retain the part disposed thereon, and
means for urging said retaining bars close to one another to retain the part on the pallet.
15. The pallet of claim 14, additionally comprising
a hole disposed in said base,
a pair of steps on said base, each step formed on a respective side of said hole, and wherein
said means for urging said retaining bars close to one another to retain the part on said pallet, comprise a pair of leaf springs, each leaf spring seated between a respective step and bar.
US06/591,190 1983-05-02 1984-03-19 Apparatus and method for mounting chip type electronic parts Expired - Fee Related US4619043A (en)
JP58-76205 1983-05-02
JP58076205A JPH0218598B2 (en) 1983-05-02 1983-05-02
JP7369083U JPH0215357Y2 (en) 1983-05-19 1983-05-19
JP1983073691U JPH021863Y2 (en) 1983-05-19 1983-05-19
JP58-73690[U]JPX 1983-05-19
JP1983082970U JPH029600Y2 (en) 1983-06-02 1983-06-02
JP8501983U JPH0211836Y2 (en) 1983-06-06 1983-06-06
JP1983089175U JPH0217519Y2 (en) 1983-06-13 1983-06-13
JP9695683U JPS605200U (en) 1983-06-23 1983-06-23
US4619043A true US4619043A (en) 1986-10-28
ID=27565197
US06/591,190 Expired - Fee Related US4619043A (en) 1983-05-02 1984-03-19 Apparatus and method for mounting chip type electronic parts
US (1) US4619043A (en)
CA (1) CA1217572A (en)
DE (1) DE3409909A1 (en)
FR (1) FR2545677B1 (en)
GB (1) GB2140716B (en)
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1984-03-17 DE DE19843409909 patent/DE3409909A1/en active Granted
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Owner name: TDK CORPORATION, TOKYO, JAPAN
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:TAKAHASHI, TETSUO;TAGUCHI, YOSHINOBU;SAITO, KENICHI;REEL/FRAME:004274/0871