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(4) Single actuation mechanism/contact actuation mechanism: (Fig. 9 and Fig. 10)
Single/contact actuation mechanism changeover is accomplished by turning the switching device
(Change Knob [55]).
Single actuation mechanism (Switching device:
upward position):
1) Immediately after driving the first nail, the control
valve should be as shown in Fig. 8.
2) When only Pushing Lever (B) [37] is released
and Trigger (A) [52] is held as shown in Fig. 9,
the plate of Trigger (A) [52] contacts the Change
Knob [55] and Plunger (A) [66] returns (lowers)
only halfway.
Because of this, compressed air does not flow
into the valve piston lower chamber, and Valve
Piston (B) [63] remains in the lowered position.
Accordingly, the Piston [15] remains in the
lowered position as shown in Fig. 7.
3) When Trigger (A) [52] is released, Plunger (A)
[66] returns (lowers) completely as shown in
Fig. 6. Compressed air then flows into the valve
piston lower chamber, and Valve Piston (B) [63]
is forced upward. The Piston [15] then returns
fully upward. Therefore, unless Trigger (A) [52]
is released after each nailing operation, the
structural mechanism prevents the next nailing
operation.
Contact actuation mechanism (Switching device:
downward position):
1) Immediately after the first nail is driven, the
control valve should be as shown in Fig. 8.
2) Even when only Pushing Lever (B) [37] is
released and Trigger (A) [52] is held, Plunger
(A) [66] returns (lowers) completely as shown in
Fig. 10. Thus the Piston [15] returns (raises)
fully. Accordingly, continuous nailing can be
accomplished by pushing only Pushing Lever
(B) [37] up and down while holding Trigger (A)
[52] depressed.
Plunger (A) [66]
Switching device (Change Knob [55])
(upward position)
Fig. 9 Single actuation mechanism
Plunger (A) [66]
Switching device (Change Knob [55])
(upward position)
Fig. 10 Contact actuation mechanism
--- 15 ---
Accumulator
Valve Piston (B) [63]
Trigger (A) [52]
Plate
Valve piston
lower chamber
Pushing Lever (B) [37]
Accumulator
Valve Piston (B) [63]
Trigger (A) [52]
Valve piston
lower chamber
Pushing Lever (B) [37]
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