Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Automatic and/or material-triggered control
Reexamination Certificate
2001-11-21
2004-06-15
Crispino, Richard (Department: 1734)
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Automatic and/or material-triggered control
C156S363000, C156S362000, C156S583200, C221S010000, C221S013000, C221S025000, C221S071000, C221S072000, C221S073000, C226S027000, C226S033000
Reexamination Certificate
active
06748991
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a feeder for a surface mounting device, and more particularly, to a feeder for a surface mounting device which carries surface mounting parts to a parts suction position of a nozzle from the surface mounting device for sucking surface mounting parts and mounting them on a printed circuit board.
2. Description of the Related Art
A surface mounting device includes an X-Y gantry, a module head, a PCB carrier, and a feeder. The module head is assembled to be moved to the X-Y gantry in the X-Y axis direction and sucks surface mounting parts (Hereinafter, referred to as “parts”) onto a printed circuit board carried by the PCB carrier and then mounts them on the printed circuit board. The parts to be mounted on the printed circuit board are carried by the feeder and are mounted on the printed circuit board. The feeder which mounts parts on the printed circuit board will now be described with reference to the accompanying drawings.
As illustrated in
FIG. 1
, the feeder includes a vinyl recovery unit
10
, a vinyl separation unit
20
and a feeding unit
30
. A recovery reel
11
is mounted at the vinyl recovery unit
10
and then winds vinyl (V: shown in
FIG. 3
) carried by the vinyl separation unit
20
to recover the same. The vinyl (V) is separated from a tape (TF: shown in
FIG. 3
) wound around a tape take-up unit
50
(shown in FIG.
2
), and the tape take-up unit
50
is installed at the rear end of the vinyl recovery unit
10
. The tape (TF) fed to the feeder
30
is moved by the feeder at a predetermined pitch for each movement and is carried to a work position. Then, it is sucked by a nozzle (N: shown in FIG.
2
), is moved to a printed circuit board (not shown) and is mounted thereon.
The feeder which carries the tape (TF) to carry parts to a sucking position of the nozzle (N) includes a vinyl recovery unit
10
, a vinyl separation unit
20
, a feeding unit
30
and a tape take-up unit
50
. The construction of each element will now be described with reference to FIG.
2
. As illustrated in
FIG. 2
, the vinyl recovery unit
10
includes a recovery reel
11
, a recovery rotation motor
12
, a recovery unit worm
13
, a recovery unit worm gear
14
and a recovery unit gear
15
. The vinyl separation unit
20
includes a separation rotation motor
21
, a separation unit worm
22
, a separation unit worm gear
23
, a first separation unit gear
24
, a second separation unit gear
25
, and a third separation unit gear
26
. The feeder
30
includes a feed rotation motor
31
, a feed worm
32
, a sector gear
33
, a first arm
34
, a second arm
35
, and a driving wheel
36
with driving teeth
36
a.
At the vinyl recovery unit
10
, the recovery rotation motor
12
generating a rotation force for rotating the recovery reel
11
is fixedly installed. At the central axis of rotation of the recovery rotation motor
12
, the recovery unit worm
13
is installed. The recovery unit worm
13
is interlockingly rotated by the rotation of the recovery rotation motor
12
, and the recovery unit worm gear
14
is rotated by the rotation of the recovery unit worm
13
. The recovery unit worm
13
and the recovery unit worm gear
14
change a rotational direction generated from the recovery rotation motor
14
and transfers the same to the recovery unit gear
15
. The recovery unit gear
15
having received a rotation force winds the vinyl (V) shown in
FIG. 3
to recover the same by rotating the recovery reel
11
in a predetermined direction.
The vinyl (V) wound round the recovery reel
11
of the vinyl recovery unit
10
is carried to the vinyl separation unit
20
. With respect to the vinyl separation unit
20
, the rotation force generated from the vinyl rotation motor
21
is transferred to the separation unit worm
22
assembled at the central axis of rotation. The rotation force transferred to the separation unit worm
22
is transferred to the separation unit worm gear
23
assembled at the separation unit worm
22
. In this process, the rotational direction is changed to be transferred to the first separation unit gear
24
. The first separation unit gear
24
is assembled with the second separation unit gear
25
and the third separation unit gear
26
sequentially, and the second separation unit gear
25
and the third separation unit gear
26
are rotated in the reverse direction with each other by the rotation of the first separation unit gear
24
.
While the second separation unit gear
25
and the third separation unit gear
26
are rotated in the reverse direction, as shown in
FIG. 3
, the vinyl (V) attached to the tape (TF) is inserted between the second separation unit gear
25
and the third separation unit gear
26
and then the inserted vinyl (V) is carried to the vinyl recovery unit
10
. Here, the tape (TF) is moved to the bottom of a cover
41
as shown in
FIG. 3
by the rotation of the tape take-up unit
50
in a state where it is wound around the tape take-up unit
50
. The tape (TF) moved to the cover
41
is carried to a suction position (A) in a state where the vinyl (V) attached to the tape (TF) is removed. The tape (TF) has a plurality of parts mounting grooves (L) formed at a constant interval, and parts are mounted inside each of the parts mounting grooves (L). When the parts mounting groove (L) with a parts mounted thereto is carried to the suction position (A) of the nozzle (N), a shutter
42
assembled at a cover
41
is opened so that the nozzle (N) can suck the parts. In this state, the nozzle (N) sucks the parts and carries it to the printed circuit board.
To carry the tape (TF) at a predetermined interval, a plurality of transfer holes (A) are formed at one end of the tape (TF) at a predetermined interval. To insert the tape (TF) into the transfer holes (H) formed at a predetermined interval and carry the same at a constant pitch interval, the feeding unit
30
is installed at the bottom of the tape (TF). In the feeding unit
30
, a rotation force is generated from the feed rotation motor
31
in order to carry the tap (TF) at a constant pitch interval. The rotation force generated from the feed rotation motor
31
is transferred to the feed worm
32
assembled at the central axis of rotation of the feed rotation motor
31
, and thusly the sector gear
33
assembled at the bottom of the feed worm
32
is driven.
When the sector gear
33
is driven, the first arm
34
and second arm
35
assembled at the sector gear
33
are driven to rotate the driving wheel
36
assembled at the second arm
35
at a constant pitch. On the outer circumferential surface of the driving wheel
36
rotated at a constant pitch, the driving teeth
36
a
are formed at a constant interval. The driving teeth
36
a
are inserted into the transfer holes (H) formed at the tape (TF) and carries the tape (TF) at a constant pitch to move the parts to the suction position (A) by the rotation of the driving wheel
36
. Here, a reverse rotation preventing member
37
assembled at the driving wheel
36
prevents the reverse rotation of the driving wheel
36
.
In the above-described feeder of the conventional art, since a great number of elements including a rotation motor, worm gear and linking gear are used for driving the vinyl recovery unit, vinyl separation unit and feeding unit respectively, the structure is made complex and a number of steps of assembling is increased. In addition, the driving wheel carrying the tape at a constant pitch is provided with the reverse rotation preventing member, thus disabling the adjustment of the position of the tape if a parts is deviated from a designated position.
SUMMARY OF THE INVENTION
It is, therefore, an object of the present invention to provide a feeder for a surface mounting device in which the constitution of the feeder is simplified by forming integrally a parts feeding unit carrying the tape wrapped up parts at a constant pitch, thus enabling a forward/backward rotation and adjusting the feed position of the tape.
It is another object of the p
Hwang Ji Hyun
Hwang Sang Yeon
Kim Do Hyun
Crispino Richard
Fleshner & Kim LLP
Koch George R.
Mirae Corporation
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