This paper configured an improved grip system for gripping and transferring large flat sheets in a noncontact manner. The conventional method for changing the direction of large flat sheets in a conveyor system is to turn the system itself. The new configured grip system applied a noncontact pneumatic head in the vertical direction, with the use of an air levitation table, and L-shaped latches, to lift and rotate large flat sheets to change their direction in the conveyor system. The pneumatic heads made efficient use of a vortex flow and an internal flow guide to improve the swirling flow. The gripping force for the improved head with the inner flow guide was 10% higher than that for the conventional head. To construct a rotational grip system, 12 improved noncontact heads and eight pairs of L-shaped latches were used to provide gripping force against an eight generation liquid crystal display (LCD) glass as a 4:6 ratio, each other. With a partial levitation force from the air blow table, the head-and-latch configuration resulted in the overall glass flatness approaching within 3.0 mm on the lower side at a selected grip rotation height of 40 mm.

References

References
1.
Chang
,
Y.-S.
,
Chang
,
H.-S.
,
Choi
,
J.-B.
,
Kim
,
Y.-J.
,
Chun
,
P.-H.
, and
Kong
,
J.-Y.
,
2008
, “
Flow and Dynamic Characteristics Between FPD and Contact-Free Handler Nozzles
,”
Adv. Mater. Res.
,
33–37
, pp.
1089
1094
.10.4028/www.scientific.net/AMR.33-37.1089
2.
Kim
,
J. H.
,
2012
, “
Design of the Air Pressure Pick-Up Head for Non-Contact Wafer Gripper
,”
J. Korean Soc. Mach. Tool Eng.
,
21
(
3
), pp.
401
407
.10.7735/ksmte.2012.21.3.401
3.
Dini
,
G.
,
Fantoni
,
G.
, and
Failli
,
F.
,
2009
, “
Grasping Leather Plies by Bernoulli Grippers
,”
CIRP Ann. Manuf. Technol.
,
58
(
1
), pp.
21
24
.10.1016/j.cirp.2009.03.076
4.
Li
,
X.
,
Kawashima
,
K.
, and
Kagawa
,
T.
,
2008
, “
Analysis of Vortex Levitation
,”
Exp. Therm. Fluid Sci.
,
32
(
8
), pp.
1448
1454
.10.1016/j.expthermflusci.2008.03.010
5.
LaMagna
,
J. L.
,
1990
, “
Air Pressure Pick-Up Tool
,”
U.S. Patent No. 4,969,676
.
6.
Safabakhsh
,
A. R.
,
1992
, “
Non-Contact Pick-Up Head
,”
U.S. Patent No. 5,169,196
.
7.
Siniaguine
,
O.
, and
Steinberg
,
G.
,
2000
, “
Non-Contact Holder for Wafer-Like Articles
,”
U.S. Patent No. 6,099,056
.
8.
Lee
,
H. G.
, and
Lee
,
D. G.
,
2006
, “
Design of a Large LCD Panel Handling Air Conveyor With Minimum Air Consumption
,”
Mech. Mach. Theory
,
41
(
7
), pp.
790
806
.10.1016/j.mechmachtheory.2005.10.009
9.
Yassouri
,
Y.
, and
Hasolelim
,
K.
,
2007
, “
Method for Cleaning Surfaces Using Parallel Flow
,”
U.S. Patent No. 0175499 A1
.
10.
Jung
,
H. J.
,
2012
, “
Apparatus for Transferring of Glass Panel
,”
KR Patent No. 1011876790000.
11.
Lee
,
T. G.
,
Yu
,
J. S.
,
Jung
,
H. J.
,
Kim
,
J.-H.
, and
Kim
,
J. H.
,
2013
, “
Development of the Air Floating Conveyor System for the Large Glass Sheet
,”
J. Korean Soc. Mach. Tool Eng.
,
22
(
4
), pp.
635
642
.10.7735/ksmte.2013.22.4.635
12.
Kim
,
J. H.
,
Jeong
,
Y. S.
,
Lee
,
T. G.
,
Kim
,
T. H.
, and
Jung
,
H. J.
,
2013
, “
Non-Contact Level on Air Levitation Table With Porous Chamber Array
,”
J. Korean Soc. Mach. Tool Eng.
,
22
(
6
), pp.
913
920
.10.7735/ksmte.2013.22.6.913
13.
Devitt
,
A. J.
,
2011
, “
Non-Contact Porous Air Bearing and Glass Flattening Device
,”
U.S. Patent No. 79088584 B2
.
14.
Davis
,
S.
,
Gray
,
J. O.
, and
Caldwell
,
D. G.
,
2008
, “
An End Effector Based on the Bernoulli Principle for Handling Sliced Fruit and Vegetables
,”
Rob. Comput. Integr. Manuf.
,
24
(
1
), pp.
249
257
.10.1016/j.rcim.2006.11.002
15.
Erzincanli
,
E.
,
Sharp
,
J. M.
, and
Erhal
,
S.
,
1998
, “
Design and Operational Considerations of a Non-Contact Robotic Handling System for Non-Rigid Materials
,”
Int. J. Mach. Tools Mater.
,
38
(
4
), pp.
353
361
.10.1016/S0890-6955(97)00037-0
You do not currently have access to this content.