Hitachi Koki VB 16Y Mode D'emploi page 13

HOW TO USE (BENDING)
WARNING!
Note that the unit is not a hand-held tool. Be
absolutely sure to use the unit only after placing
it on a stable spots such as floor, ground, etc.
Never bring your hand close to the bending roller
during operation.
Never bend any materials other than the rebars. If
you attempt to do so, the material can splinter into
pieces and scatter.
Bend less than every 3 pieces of rebar with a 10mm
diameter, less than every 2 pieces with a 12 mm
diameter, and every 1 piece with a 16mm diameter.
Remember that the cutter moves even during the
bending operation, thereby, close the cutter cover
without fail.
Begin operation only after marking sure that there
are no people within the turning range of the material
to be bent.
Dial indication
Condition of rebar
In bending the rebar of 10mm, 12mm, and 16mm
diameters, a difference takes place in the bending
angle even in the same dial position depending
upon the difference of rebar's thickness. Slightly
change a position of the setting dial depending
upon the rebar's diameter even with the same
bending angle as illustrated in the top diagram on
the left column. (Fig. 11)
Size of rebar
ø10 mm
ø12 mm
ø16 mm
NOTE
Even at the same dial setting position, the bending
angle can sometimes differ if the diameter or hardness
of the rebar is different. Use the angle marks merely
as a rough guideline.
2. Ordinary bending.
(1) Set the unit in the position with the turntable up
as shown in Fig. 12.
(2) Make sure that the cover is closed.
(3) Set the setting dial at the desired angle.
(4) Place the rebar on the stopper of the center plate
and set it correctly as shown in Fig. 9.
(5) Pull the switch trigger and bent the rebar.
45°
45° 90°
Colors of indicated marks
White
Red
Yellow
Reserve an extra length of at least 200 mm on the
bending length of the rebar to be bent. (Fig. 9)
If the extra length is not long enough, the rebar
can come off during bending operation, or it can
break into fragments and scatter dangerously.
Place the rebar on the center plate and set it so
that it is horizontal with the turntable surface.
If the side that is to be bent is set inclined upward,
the rebar can come loose from the bending roller
while bending causing it to fly off. (Fig. 10)
When bending multiple rebars at one time, some
may come off the bending roller and guide, etc.,
and therefore exercise caution and set them
horizontally.
If you bend the rebar with a large angle while
placing your hand onto it, there is a fear of getting
your hand caught in by the fold-back reaction of
the rebar. Never place your hand onto the position
where the rebar may fold back.
1. Setting bending angles by setting dial.
The bar can be bent according to the angles indicated
on the setting dial, as shown in Fig. 16.
90°
135°
Fig. 16
(6) Continue pulling the switch trigger untill the motor
makes reverse rotation and the bending roller starts
to return. (Once the bending roller starts to return,
it will automatically return all the way to the home
position even if the switch trigger is released.)
3. Bending by eye measurement.
By pulling the switching trigger little by little, you
can bend the rebar to your desired angle by eye
measurement in addition to the dial setting.
(1) Set the setting dial to a larger angle than you
desire.
(2) Pull the switch trigger lightly and bend the rebar
slowly.
(3) When the rebar is bent to the desired angle, stop
pulling the switch. If the bar is still small of the
desired angle, pull the switch again.
(4) Remove the rebar after bending has been finished.
Then, pull the switch once more and return the
bending roller to the home position. (Continue
pulling the switch until the bending roller begins
reverse rotation.)
4. Removing rebar during bending operation
When bending out at a low speed in "bending by
eye measurement", the rebar can sometimes get
caught in the bending roller due to its own flexure.
If this occurs, you can return the bending roller to
the home position by pulling the switch again after
setting the setting dial to the "return" position. This
is the same method used to remove the rebar when
it gets caught during cutting operation. (Fig. 13)
135° 180°
180°
English
12