Installation of Spring limit switch bock:
Gate
Gate
Spring
Spring limit
limit
switch
switch block
block
Chain
Chain
Hexagon
Hexagon screw
screw
M6
M6 × 65
65
4545
Figure 14
Gate
Gate
Main
Main engine
engine
Chain
Chain wheel
wheel
Chain
Chain
Spring
Spring limit
limit switch
switch block
block
Spring
Spring
Spring washer
φ
8
Nut M8
Flat washer
φ
8
Figure 15