FAAC 760, Руководство по установке, Страница: 25 / 31

25
Installing an Extension Arm
Some gate installations do not meet the geometrical
constraints shown in Figure 4. In those situations, the
760 Extension Arm option can be used to install a 760
operator.
The geometrical constraint for using the 760 Extension
Arm is that the center of the splined shaft on the
mounting box
must be within 6 in. (15.25 cm) of the
axis of rotation of the gate leaf.
WARNING! The farther away the splined shaft is from
the gate's axis of rotation, the greater the risk of danger
from pinch points.
Install the mounting box so that the splined shaft is as
near as possible to the gate's rotation axis and is directly
beneath the center of the fully closed gate leaf.
You need to position the extension collar (see Figure
27) so that it smoothly slides within the extension U
from the fully closed to the fully opened position. Note
that the position of the extension collar is affected by
the overlap of the extension bar and extension U.
Attach the 760 extension collar to the bottom of the gate
leaf with a 7/16 in. bolt.
Weld together the extension bar and extension U
according to Figure 30.
Caution: Do not weld anything to or on the inside of
the sleeve of the splined shaft.
Next, weld the outside of the sleeve for the splined shaft
solidly to the inside of the hole in the end of the
extension bar.
Follow the rest of the instructions for installing the 760
Operator. With an extension arm, you need not worry
about installing a gate leaf shoe nor about installing the
gate leaf in the shoe. Instead, you will install one end of
the welded extension arm over the splined shaft and the
other end around the extension collar.
In addition, you will need to provide a washer beneath
the extension collar to keep the extension U from falling
off the collar. You also need to shield any pinch points
around the extension arm for safe operation.
(b)
(a) Minimum overlap of
2 1/2 in. (6.4 cm)
750 extension
bar
750 extension U
750 extension
collar is attached
to the bottom of
the gate leaf
Extension bar
Minimum overlap of
2 1/2 in. ( 6.4 cm)
Extension U
Extension
collar slides
within
extension U
Hole in the extension bar fits around and
is welded to the outside of the sleeve of
the splined shaft
Bottom of
gate leaf
Figure 27. The 760 Extension Arm, (a) side view and (b) top view
750/ 760
extension bar
750/ 760
extension U
750/ 760 extension collar
is attached to the bottom of
the gate leaf