COUPLING/UNCOUPLING DEVICE FOR MULTI-COUPLING PLATES
FIG9 illustrates a sectional view of a detail of the coupling between the operating trigger and the plate-like element with which said trigger is associated 
Elastic means 26 (shown in FIG9) advantageously consisting of a helical spring are placed between the trigger 21 and the plate-like element 13 and act to keep said trigger in the advanced position in which, with the lever 11 lowered, the pin 22 of said trigger 21 is engaged in said first receiving seat 24.
sectional view
24
seat
11
lever
22
pin
25
seat
21
trigger
23
flange
13
plate-like element plate-like elements
['1. A coupling/uncoupling device (10) of a multi-coupling device (30) for the simultaneous connection of a plurality of hydraulic and/or electrical and/or pneumatic lines comprising a movable plate (31) and a fixed plate (32) each supporting a plurality of quick semi-couplings (33), said coupling/uncoupling device (10) comprising a pair of plate-like elements (13, 14) each hinged on one side of the movable plate (31),  characterized in that  it comprises safety locking means (20) comprising a trigger (21) that can be operated by the user and is associated with one of said plate-like elements (13, 14) in a translatable manner.', "2. A coupling/uncoupling device (10) according to the preceding claim,  characterized in that  it further comprises a lever (11) that can be operated by the user, connected to one of said plate-like elements (13, 14), and  in that  each of said plate-like elements (13, 14) has an eccentric guide or groove (13', 14') configured to receive suitable clamping pins (15) provided on said fixed plate (32) so that the action of said eccentric groove (13', 14') on said pins (15) causes the nearing of the movable plate (31) to the fixed plate (32) and the connection of the couplings (33) due to the effect of the action of the user on said lever (11).", '4. A coupling/uncoupling device (10) according to the preceding claim,  characterized in that  said trigger element (21) comprises a first portion (21a, 21b, 21c) that can be operated by the operator with one finger and projects outwards from said first plate-like element (13), and a second pin portion (22) that projects from said plate-like element (13) towards the inside of the device.', "6. A coupling/uncoupling device (10) according to one or more of the preceding claims,  characterized in that  said safety means (20) also comprise a first receiving seat (24) for receiving said second pin portion (22) of said trigger (21), made on the body  of said first plate (31), preferably made on a flange (23) that is integral with said first plate (31) and having a curved-profile upper edge (23'), and a second receiving seat (25), also made on said flange (23), of said second pin portion (22) of said trigger (21) ."]