Information
-
Patent Grant
-
6824033
-
Patent Number
6,824,033
-
Date Filed
Monday, January 6, 200322 years ago
-
Date Issued
Tuesday, November 30, 200420 years ago
-
Inventors
-
Original Assignees
-
Examiners
- Matecki; Kathy
- Langdon; Evan
Agents
-
CPC
-
US Classifications
Field of Search
US
- 226 128
- 226 129
- 156 584
- 242 6153
- 242 5644
-
International Classifications
-
Abstract
The present invention discloses 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 lever; 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.
Description
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.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will become better understood with reference to the accompanying drawings which are given only by way of illustration and thus are not limitative of the present invention, wherein:
FIG. 1
is a perspective view illustrating a tape feeder according to a conventional art;
FIG. 2
is a side view illustrating a tape feeder applied to the present invention;
FIG. 3
is a perspective view illustrating a shutter installed to a cover plate;
FIG. 4
is a perspective view illustrating an eccentric cam applied to a tape feeder; and
FIGS. 5
a
to
5
c
are side views illustrating operation flows of an eccentric cam.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
A tape feeder in accordance with preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
FIG. 2
is a side view illustrating a tape feeder applied to the present invention.
FIG. 3
is a perspective view illustrating a shutter installed to a cover plate.
FIG. 4
is a perspective view illustrating an eccentric cam applied to a tape feeder.
FIGS. 5
a
to
5
c
are side views illustrating operating flows of the eccentric cam.
The tape feeder
100
according to the present invention, as shown in
FIG. 2
, comprises a main frame
110
, a cover plate
200
installed to an upper portion of the main frame
110
, a shutter
220
installed to an upper portion of the cover plate
200
, first and second sprocket wheels
120
and
130
installed to a lower portion of the cover plate
200
, plural levers
310
,
320
,
330
,
340
and
350
installed to a side of the first and second sprocket wheels
120
and
130
for driving the first and second sprocket wheels
120
and
130
, and a cam
400
for driving the rotation lever
330
among the plural levers
310
,
320
,
330
,
340
and
350
.
The cover plate
200
is installed to an upper front portion of the main frame
110
and a first elastic member
171
is installed to a side of the cover plate
200
, so that the cover plate
200
is supported elastically against the main frame
110
.
On the other hand, in the cover plate
200
, as shown in
FIG. 3
, a component discharge opening
202
is formed at an upper front portion of the cover plate
200
for picking the electronic components, a vinyl exfoliation unit
204
, which can exfoliate the vinyl (not shown) attached to an upper portion of the enclosure tape for protecting the electronic components, is formed at a side of the component discharge opening
202
, and plural holes
206
are formed at a side of the vinyl exfoliation unit
204
.
Also, plural oblong type holes
222
are formed at an upper side portion of the cover plate
200
and plural guide pins
224
are inserted to the oblong type holes
222
and combined to the plural holes
206
of the cover plate
200
, so that the shutter
220
is installed to an upper portion of the cover plate
200
.
The shutter
220
, combined as above, is guided and can be moved forwardly and backwardly by the guide pin
224
as well as the length of the oblong type hole
222
toward the longitudinal direction of the cover plate
200
. A hooking jaw
226
is formed at a side of the shutter
220
.
On the other hand, in the first and second sprocket wheels
120
and
130
installed to a lower portion of the cover plate
200
, as shown in
FIG. 2
, a center portion of the first and second sprocket wheels
120
and
130
and an end of a sprocket wheel lever
310
are combined and the sprocket wheels
120
and
130
are installed to the main frame
110
by the sprocket wheel shaft
311
, so that the first and second sprocket wheels
120
and
130
can be supported to the sprocket wheel shaft
311
and can be rotated.
Also, a rotation latch
140
is fixed firmly and combined to a side of the sprocket wheel lever
310
by a combining pin
141
. When the sprocket wheel lever
310
rotates forwardly and backwardly at the center of the sprocket wheel shaft
311
with a constant section, the rotation latch
140
also moves forwardly and backwardly together, so that the first sprocket wheel
120
can be rotated toward the regular direction.
At a side of the rotation latch
140
, a fourth elastic member
174
is installed to a side of the sprocket wheel lever
310
and so the rotation latch
140
is contacted closely and elastically against the first sprocket wheel
120
. When the sprocket wheel lever
310
rotates forwardly, the rotation latch
140
is slide against the first sprocket wheel
120
by an elastic force of the fourth elastic member
174
. When the sprocket wheel lever
310
rotates backwardly, the first sprocket wheel
120
is moved through the rotation latch
140
by one pitch.
By the operation, as mentioned above, when the first sprocket wheel
120
rotates by one pitch, the second sprocket wheel
130
, which is firmly combined with the first sprocket wheel
120
, rotates together with the first sprocket wheel, so that the enclosure tape received electronic components can be moved forwardly by one pitch.
Also, at a side of the first sprocket wheel
120
, a stopper
150
installed to the main frame
110
rotatably by a stopper shaft
151
is supported elastically by the third elastic member
173
installed to its side and can prevent the reverse-rotation of the first sprocket wheel
120
.
On the other hand, the sprocket wheel lever
310
is connected to a support lever
320
by a first connection pin
312
, which is installed at its side. The other end of the support lever
320
is connected to a side of the rotation lever
330
by a second connection pin
322
, and a manual lever
340
is connected to the other end of the rotation lever
330
by the third connection pin
332
. The manual lever
340
is supported elastically by a seventh elastic member
177
, which is connected to its side and a side of the main frame
110
.
Also, a fifth elastic member
175
is installed to a side of the rotation lever
330
and a side of the sprocket wheel lever
310
, so that the rotation lever
330
and the sprocket wheel lever
310
can be supported elastically with each other.
Since the respective levers
310
,
320
,
330
,
340
and
350
are connected rotatably to the respective connection pins
312
,
322
and
332
, the driving force generated by the driving source can be transferred organically, the manual lever
340
can start a work for supporting electronic components by the manual operation of a worker when performing an initial working.
On the other hand, since a side of the rotation lever
330
among the levers
310
,
320
,
330
,
340
and
350
is installed to the main frame
110
by the rotation lever shaft
331
, it can be supported to the rotation lever shaft
331
and can be rotated.
An eccentric cam
400
capable of rotating 360 degree is installed to a side of the rotation lever
330
and a cam latch
160
is installed rotatably to a side of the rotation lever
330
by a cam latch shaft
161
. Also, the cam latch shaft
161
of the cam latch
160
is installed sildably to an oblong type hole (not shown), so that it can cope with an unreasonable rotation of the eccentric cam
400
.
A sixth elastic member
176
is installed to a side of the cam latch
160
, and the cam latch
160
is contacted closely and elastically to an outer surface of the eccentric cam
400
. When the eccentric cam
400
is rotated regularly, the cam latch
160
is slide, when the eccentric cam
400
is rotated reversely, the cam latch
160
is inserted and hooked to the groove
430
formed at its outer surface, so that the reverse rotation of the eccentric cam
400
is prevented.
On the other hand, the eccentric cam
400
, as shown in
FIG. 4
, comprises a cam shaft
410
capable of being installed to the driving source, which is installed to the main frame
110
, a taper
420
formed to an outer surface of the eccentric cam
400
with a predetermined angle, a groove
430
formed at the other side of the taper
420
, and a roller
440
installed to a side surface of the eccentric cam
400
rotatably by a roller shaft
441
.
Also, in the eccentric cam
400
, there are four sections with a circular arc outwardly from the cam shaft
410
, a diameter of the circular arc of A part is larger than that of the circular arc of B part, a taper
420
is formed between the circular arcs of A and B parts, and a groove
430
is formed between the circular arcs of A and B parts of the other side of the taper
420
.
As shown in
FIG. 2
, the eccentric cam
400
rotates clockwise by the driving source, pushes a side of the rotation lever
330
by the roller
440
, which is installed to its side, and can make the rotation lever
330
drive.
At this time, a shutter lever
350
is installed rotatably between the eccentric cam
400
and the shutter
220
by a shutter lever shaft
351
. Also, since a shutter lever pin
352
is formed at a side of the shutter lever
350
, when the shutter lever
350
is rotated with a predetermined angle, the shutter lever pin
352
pushes the hooking jaw
226
of the shutter
220
and the shutter
220
can be moved with a predetermined interval backwardly.
Also, after the shutter
220
is moved backwardly by the shutter lever pin
352
of the shutter lever
350
, the shutter
220
is moved forwardly by an elastic force of the second elastic member
172
and can be positioned at its original position.
Also, another function according to the operation of the eccentric cam
400
will be described with reference to
FIGS. 5
a
to
5
c.
Firstly, an initial preparation state of the shutter lever
350
and the eccentric cam
400
is illustrated, as shown in
FIG. 5
a
, at this time, the shutter
220
is closed.
As shown in
FIG. 5
b
, in the shutter lever
350
and the eccentric cam
400
, the eccentric cam
400
rotating toward an arrow mark's direction and the shutter lever
350
guided to its outer surface are illustrated and at this time, the shutter
220
is also closed.
As shown in
FIG. 5
c
, in the shutter lever
350
and the eccentric cam
400
, the shutter
220
is opened by the eccentric cam
400
rotating toward an arrow mark's direction and the shutter lever
350
guided against its outer surface.
Hereinafter, an operation of the tape feeder according to the present invention will be described.
Firstly, the eccentric cam
400
is rotated by the driving source and therefore the roller
440
pushes the rotation lever
330
toward the front side of the tape feeder
100
and the support lever
320
connected to the rotation lever
330
is pushed and therefore the sprocket wheel lever
310
connected to a side of the support lever
320
is rotated regularly.
At this time, the rotation latch
140
installed to a side of the sprocket wheel lever
310
is moved forwardly and thereafter the first sprocket wheel
120
is moved by the rotation latch
140
by one pitch through the reverse-rotation of the sprocket wheel lever
310
, the second sprocket wheel
130
combined with the first sprocket wheel
120
is rotated, so the enclosure tape is moved by one pitch.
On the other hand, in the shutter lever
350
being driven by the rotating eccentric cam
400
, the shutter lever pin
352
formed at a side of the shutter lever
350
pushes the hooking jaw
226
of the shutter
220
and thereby the shutter
220
is moved backwardly and the electronic components can be supplied and at this time, the electronic components are picked up by a picker (not shown).
An operation of the eccentric cam
400
will be described with reference to the accompanying drawings
FIGS. 5
a
to
5
c.
In order to push the rotation lever
330
through the roller
440
by the rotation of the eccentric cam
400
, the eccentric cam
400
is rotated. Also, in order to correspond rapidly to the shutter lever
350
, the eccentric cam
400
is rotated rapidly by the taper
420
of the eccentric cam
400
and the B part of the circular arc pushes the shutter lever
350
. At this time, the shutter
220
is closed.
Also, when the roller
440
pushes the rotation lever
330
by the rotation of the eccentric cam
400
, the shutter lever
350
is guided to an outer surface of the A part of the circular arc in which the roller
440
is installed. At this time, the shutter
220
is also closed.
Also, when the taper
420
of the eccentric cam
400
is coincided with a side of the shutter lever
350
by the continuing rotation of the eccentric cam
400
, the shutter
220
is opened.
Also, when a setting work is performed in order to supply electronic components, the worker operates the manual lever
340
and therefore the enclosure tape is moved by one pitch and thereby the device can be set in order to be maintained closely to a working position capable of picking up the electronic components.
As described above, the first and second sprocket wheels and the shutter can be operated simultaneously and respectively by one rotation operation of the eccentric cam of the present invention as above-constructed, the above operations are performed continually and therefore the plural electronic components received to the enclosure tape can be supplied continually.
In the tape feeder of the present invention, there are several advantages that its connection construction is simple by using the eccentric cam capable of driving the first and second sprocket wheels and the shutter simultaneously and respectively, and the manual lever and simultaneously it can be initiated easily.
Also, there is also an advantage that the forward and backward movement can be implemented, that is, the reel supply is finished from the driving source rotation rotating toward one direction and thereafter the shutter is opened.
As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalences of such metes and bounds are therefore intended to be embraced by the appended claims.
Claims
- 1. 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; first and second sprocket wheels installed on the main frame and configured to move a tape holding electronic components by a predetermined pitch; a rotating latch mounted on the main frame and configured to rotate 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 and configured to drive the rotating latch via the plural levers; a shutter lever coupled to the shutter and the eccentric cam and configured to move the shutter by the driving of the eccentric cam; and a manual lever coupled to the rotating latch and configured to move the rotating latch, but not the shutter lever.
- 2. A tape feeder according to claim 1, wherein the plural levers comprise a sprocket wheel lever, a support lever connected to the sprocket wheel lever by a first connection pin, and a rotating lever connected to the support lever by a second connection pin.
- 3. A tape feeder according to claim 1, wherein the eccentric cam has a groove formed at its outer surface.
- 4. A tape feeder according to claim 1, wherein a roller is installed to a side of the eccentric cam, and wherein the roller is configured to bear against one of the plural levers.
- 5. A tape feeder according to claim 1, further comprising a cam latch installed to a side of the eccentric cam and configured to prevent the reverse rotation of the eccentric cam.
- 6. A tape feeder according to claim 1, wherein the shutter lever is not coupled to the manual lever.
- 7. A tape feeder according to claim 1, wherein the manual lever is adapted to be operated independently of the shutter lever.
- 8. A tape feeder according to claim 1, wherein the first and second sprocket wheels can be rotated without operation of the shutter.
- 9. A tape feeder according to claim 1, wherein a first surface of the eccentric cam contacts the shutter lever, and a second surface of the eccentric cam contacts one of the plural levers.
- 10. A tape feeder according to claim 9, wherein the first surface comprises a periphery of the eccentric cam, and the second surface comprises a projection disposed on a side of the eccentric cam.
- 11. A tape feeder, comprisinga main frame having a component discharge opening; a shutter mounted on the main frame and configured to move to cover and expose the component discharge opening, a tape transfer unit configured to move a component supply tape relative to the component discharge opening; a tape positioning member configured to operate the tape transfer unit, wherein the tape positioning member can cause the tape transfer unit to move the component supply tape without moving the shutter; and a cam configured to simultaneously operate the shutter and the tape transfer unit.
- 12. The part feeder of claim 11, wherein the cam comprises first and second surfaces, wherein the first surface drives the shutter and wherein the second surface drives the tape transfer unit.
- 13. The tape feeder of claim 12, wherein the first surface of the cam acts against a shutter level coupled to the shutter.
- 14. The part feeder of claim 12, wherein the second surface comprises a roller mounted on a side of the cam.
- 15. The part feeder of claim 11, wherein the tape positioning member comprises a manual lever.
- 16. The part feeder of claim 11, wherein the tape transfer unit comprises a first sprocket wheel that engages and moves the component supply tape, a second sprocket wheel coupled to the first sprocket wheel, and a rotating latch configured to rotate the second sprocket wheel by contacting respective teeth of the second sprocket wheel.
- 17. A method of feeding a carrier tape, comprising:providing a tape feeder including a cam, a tape feeding member, a shutter, and a tape setting member; rotating the cam to simultaneously drive the tape feeding member and the shutter; and operating the tape setting member to drive the tape feeding member, wherein operating the tape setting member does not drive the shutter.
- 18. The method of claim 17, wherein operating the tape setting member comprises a manual operation.
Priority Claims (1)
Number |
Date |
Country |
Kind |
10-2002-0051244 |
Aug 2002 |
KR |
|
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
6032845 |
Piccone et al. |
Mar 2000 |
A |