fitted additionally with a bearing such as a ball bearing not shown the activating means 132 works together with the first actuating element 290 and the second actuating element 260 the first actuating element 290 engaging on the underside of the journal 139 a b see fig1 and 11 and the second actuating element 260 on the top side of the journals 139 a b see fig1 the lever is bent he has a first leg 116 and a second leg 120 with the free ends 118 122 which are identical to the ends 136 138 of the lever in the connection region 130 of the two legs 116 120 is arranged the activating means 132 the second leg 120 has two openings 142 a b through which the pivot axis 114 runs and which together with the swivel support 140 and a bearing bolt 144 form the swivel support of the locking hook 110 see fig5 the center of gravity of the locking hook 110 is at a distance from the pivot axis 114 so that the locking hook in the installed position of the locking device 10 drops by gravity from its standby position into its locking position in fig5 is shown the bottom view of the container lock housing 100 with mounted locking hook 110 the swivel support 140 is fastened to the back wall 108 by means of the bearing bolt 144 the second leg 120 of the locking hook 110 is mounted to pivot on the swivel support 140 in fig6 is shown the underside of the container lock box 200 with the components of the three subassemblies.