1. Specifications Check
33
Procedure 2 : Check for the vertical allowable load of the fingers and allowable moment
Check the vertical load and the moment applicable to the finger. Figure out Fz, Ma, Mb
and Mc by referring to (1) to (3) described below, and it is necessary to select a suitable
model considering not to exceed the allowable values.
Fig. 1 Load and the moment applicable to the finger
M
Ia
, M
Oa
F
X
M
Ib
, M
Ob
M
Oc
Reactive force of
gripping the work
part
Finger
Finger attachment
Gripping point
Work
Center of gravity for finger
attachment and work piece
F
Y
F
Z
L
C
L
G
H
C
H
G
F
X
:
F
Y
:
F
Z
:
L
G
:
H
G
:
L
C
:
H
C
:
External force in X direction applied to work piece and finger [N]
External force in Y direction applied to work piece and finger [N]
External force in Z direction applied to work piece and finger [N]
Distance from finger attachment surface to gripping point (Gripping
point) [mm]
(Note 1)
Distance from center of fingers to gripping point (Overhang) [mm]
(Note 1)
Distance from finger attachment surface to center of gravity for work
piece and finger attachment [mm]
Distance from center of fingers to center of gravity for work piece and
finger attachment [mm]
M
Ia
:
M
Ib
:
M
Oa
:
M
Ob
:
M
Oc
:
Ma:
Mb:
Mc:
Moment in Ma direction generated on fingers due to grip force [N•m]
Moment in Mb direction generated on fingers due to grip force [N•m]
Moment in Ma direction generated on
fingers due to external force [N•m]
Moment in Mb direction generated on
fingers due to external force [N•m]
Moment in Mc direction generated on
fingers due to external force [N•m]
All moments in Ma direction generated on fingers [N•m]
All moments in Mb direction generated on fingers [N•m]
All moments in Mc direction generated on fingers [N•m]
Note1 For L
G
and H
G
, have the values next page as the upper limit. Exceeding the allowable range may generate an excessive moment on the
finger sliding mechanism, which may be a cause of a bad impact to the product life.
Содержание GR3LM
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Страница 70: ...2 Installation 64 Shaft bracket Flange bracket Shaft bracket Flange bracket φ φ φ φ φ φ φ φ 2 GRS 3 GRM ...
Страница 71: ...2 Installation 65 4 GRHM Shaft bracket Flange bracket 5 GRHB Flange bracket Shaft bracket ...
Страница 74: ...2 Installation 68 depth 8 depth 8 GRS GRM ...
Страница 77: ...2 Installation 71 depth 5 depth 6 φ φ GR3SS GR3SM ...
Страница 78: ...2 Installation 72 GR3LS GR3LM ...
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