Advancing material of indeterminate length – By intermittent material-mover – Manual material-mover
Reexamination Certificate
2003-01-06
2004-11-30
Matecki, Kathy (Department: 3654)
Advancing material of indeterminate length
By intermittent material-mover
Manual material-mover
C226S129000, C242S615300, C242S564400, C156S583200
Reexamination Certificate
active
06824033
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a tape feeder, more particularly, to a tape feeder in which an impact caused by a pitch transfer of a tape is removed, electronic components do not protruded, the exact opening and closing of a shutter is performed. Simultaneously, in the tape feeder of the present invention, it is possible to move manually when installing the tape feeder.
2. Description of the Background Art
Conventionally, an electronic component mount device sucks and picks up electronic components installed to a part feeder by vacuum to a nozzle of a transfer head, transfers and mounts the electronic components to a printed circuit board. There are many kinds of part feeder such as a tape feeder, a tube feeder and a tray feeder etc. Among these, especially, the tape feeder has been widely used because it is easy to supply the electronic components in large quantities.
Conventionally, as shown in
FIG. 1
, the tape feeder comprises a main frame
10
, a cover plate
20
installed to an upper portion of the main frame
10
, a shutter plate
30
installed to an upper portion of the main frame
10
, a pitch transfer unit
40
installed to a lower portion of the cover plate
20
and a pitch transfer means
50
connected to the pitch transfer unit
40
for driving the pitch transfer unit
40
.
The cover plate
20
is installed to a front side of the main frame
10
, the shutter plate
30
is reached in good condition to an upper portion of the cover plate
20
and a push member
31
is formed at a front lower portion of the cover plate
20
.
The cover plate
20
can be slide with a state that the push member
31
is inserted to a slide groove
21
formed on its side. A cover tape exfoliation unit
22
is formed at a rear side of the push member
31
and the push member
31
pushes the electronic components, so that the separation of the electronic components can be prevented.
Also, a guide groove
32
, an oblong hole type, is formed at a side of the shutter plate
30
, plural guide pins
34
are installed movably to the inside of the guide groove
32
and an incision groove
36
for receiving a pitch transfer member
52
is formed at a side of the guide groove
32
.
The pitch transfer unit
40
comprises a first sprocket wheel
40
a
for performing a pitch transfer of an enclosure tape (not shown), a second sprocket wheel
40
b
installed to a side of the first sprocket wheel
40
a
for rotating together with the first sprocket wheel
40
a
, a latch
42
installed to a side of the second sprocket wheel
40
b
for preventing from rotating reversely the second sprocket wheel
40
b
, a first lever
43
in which its end is connected fixedly to a center of the first and second sprocket wheels
40
a
and
40
b
for performing a pitch transfer of the first and second sprocket wheels
40
a
and
40
b
, a rotation shaft
44
installed rotatably to the other side of the first lever
43
, a second lever
46
connected and installed together with the first lever
43
by the rotation of the shaft
44
, a third lever
47
positioned on the same straight line of the second lever
46
, an elastic member
48
for connecting together the secong and third levers
46
and
47
, and an eccentric cam
49
installed at a side of the third lever
47
.
A pin
49
a
is formed at an eccentric portion which is apart from the center of the eccentric cam
49
and an end of the third lever
47
is installed to the pin
49
a
, so that the third lever
47
is driven by the rotation of the cam
49
.
Also, the pitch transfer means
50
being driven together with the pitch transfer unit
40
comprises a transfer lever
51
in which its end is connected to the rotation shaft
44
, and a pitch transfer member
52
connected to a side of the transfer lever
51
.
As described above, in the conventional tape feeder, when the eccentric cam
49
is rotated by a driving source (not shown), the third lever
47
connected to the pin
49
a
formed at a side of the eccentric cam
49
performs a straight-line motion.
The second lever
46
positioned on the same straight line of the third lever
47
performs elastically a straight-line motion by the elastic member
48
connected to a side of the third lever
47
and a side of the second lever
46
.
When the pin
49
a
formed at a side of the eccentric cam
49
takes a half-turn, the eccentric cam
49
pulls the third lever
47
, whereas when the eccentric cam
49
takes a turn, the pin
49
a
is returned at its original position, the eccentric cam
49
pushes the third lever
47
.
The first lever
43
is pulled by the movement of the second lever
46
and at this time, the first sprocket wheel
40
a
is rotated by the first lever
43
by one pitch.
Also, the second sprocket wheel
40
b
combined together with the first sprocket wheel
40
a
is rotated by one pitch, the second sprocket wheel
40
b
does not rotate reversely by the latch
42
, when the second sprocket wheel
40
b
is rotated regularly, the latch
42
slides against its outer surface.
On the other hand, when the second lever
46
is pulled by the third lever
47
, the transfer lever
51
combined together with the second lever
46
to the rotation shaft
44
is also pulled and performs a straight-line movement.
By the transfer of the transfer lever
51
, the pitch transfer member
52
pushes a side of the incision groove
36
, so that the shutter plate
30
is transferred by one pitch.
When the eccentric cam
49
takes a turn completely, the first lever
43
, the second lever
46
and the third lever
47
are returned to the original position by the pin
49
a
, since the first sprocket wheel
40
a
and the second sprocket wheel
40
b
are rotated with one direction by the first lever
43
and do not rotated reversely by the latch
42
, so that the enclosure tape advances by one pitch.
As described above, there are several disadvantages that since in the conventional tape feeder, the transfer lever
51
and the pitch transfer member
52
are formed integrally, in the setting process of the enclosure tape received electronic components for supplying the electronic components, the enclosure tape can not be driven separately, so that a working position of the enclosure tape and the electronic components can not be maintained closely.
SUMMARY OF THE INVENTION
Accordingly, it is a primary object of the present invention to provide a tape feeder in which the first and second sprocket wheels and shutter can be driven separately by using an eccentric cam.
Another object of the present invention is to provide a tape feeder in which its entire construction is simple and it can be initiated by a simple operation of the manual lever when mounting the tape feeder.
In one aspect of the present invention, to achieve the above-described objects of the invention, there is provided a tape feeder for supplying plural electronic components arranged and mounted to a tape in turn comprising: a main frame; a shutter installed to an upper portion of the main frame for opening and closing a component discharge opening of the electronic components; first and second sprocket wheels installed to a lower portion of the shutter for moving the tape received the electronic components by a predetermined pitch; a rotating latch connected to the first and second sprocket wheels for rotating the first and second sprocket wheels; plural levers connected to a side of the rotating latch for driving the rotating latch; an eccentric cam having a taper formed at its side constructed rotatably for driving the rotating latch; a shutter lever constructed for performing the forward and backward movement of the shutter by the driving of the eccentric cam; and a manual lever for moving the tape by one pitch by a worker when an initial work is set to supply the electronic components.
REFERENCES:
patent: 6032845 (2000-03-01), Piccone et al.
Fleshner & Kim LLP
Langdon Evan
Matecki Kathy
Mirae Corporation
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