SMC Networks XGT312-50336 Series, Operation Manual

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3-2-3 Clamping (Sealing) (Figure 2B to Figure 2C)
The roller bearing A
⑯
gets into the fulcrum groove
⑰
and makes the lever
⑫
, the shaft
⑱
and the gate
②
stop. On the other hand, as the piston rod
⑧
and the roller block
⑨
rise
further overcoming force of spring
⑬
, the roller bearing B
⑪
moves right along with the cam
groove
⑩
of the roller block
⑨
. Because of this, the shaft
⑱
and the gate
②
lean left around
the roller bearing A
⑯
whose position is fixed by the fulcrum groove
⑰
and the gate
②
clamps an O-ring
③
to the seating face
⑲
for sealing. The lever
⑫
fixed in lateral and vertical
position leans when the plate
○
27
moves up and makes the guide pin
⑭
of the lever
⑫
unengaged from the guide groove
⑮
of the plate
○
27
. Because of this, the lateral position is
made unfixed.
3-2-4 Clamp release (Figure 2C to Figure 2B)
Since the roller block
⑨ is moved down when pressure is applied to “OPEN” side of pressure
piping (in other words, pressure i
s exhausted from “CLOSE” side of pressure piping), the roller
bearing B
⑪
moves left along with the cam groove
⑩
. Because of this, the shaft
⑱
and the
gate
②
lean right around the roller bearing A
⑯
whose position is fixed by the fulcrum groove
⑰
, and the gate
②
stops clamping. At this time, the roller bearing B
⑪
held to the lever
⑫
and the plate
○
27
held to the roller block
⑨
come to touch each other and are fixed vertically by
force of spring
⑬
and fixed laterally when the guide pin
⑭
held to the lever
⑫
is engaged into
the guide groove
⑮
of the plate
○
27
.
When the roller block
⑨
moves down, the lever
⑫
is given slight force to move down by the
roller bearing B
⑪
, but the force of spring
⑬
overcomes the force to move down and makes the
gate
②
away perpendicularly from the seat plate
⑲
.
3-2-5 Opening gate (Figure 2B to Figure 2A)
After the gate stops clamping (sealing), the gate
②
, the shaft
⑱
, the lever
⑫
and the roller
block
⑨
move down simultaneously. And the gate
②
opens and makes the slit
○
23
of the body
○
21
able to transfer workload.
3-2-6 End lock (Not shown in Figure)
In the case of sudden loss of operating pressure while the gate
②
is in the opened or closed
position, a pin
⑳
of end lock extends out and comes into an end lock groove
○
24
of the actuating
base
○
22
. Because of this, the movement of the piston rod
⑧
is restricted and the valve is held at
the position before sudden loss of operating pressure. (The gate is not held sealed during
clamping.)