FIELD: instrument technology. SUBSTANCE: for tachograph in which alignment and gripping devices for diagram disks used as data carriers are arranged in extensible container and diagram disks can be moved owing to use of extensible container between recording position and fitting-in/extracting position, u-shaped bridge 49 is proposed for aligning and locking extensible container in recording position. Housing of tachograph is secured by joint realized by means of springs 58, 59 operating for bending and installed on mounting panel to play the part balancer. Fixing pins 45, 46 are secured on ends of arms 47, 48 of bridge 49 to engage with corresponding cavities in extensible container. When bridge 49 or, respectively, projection 65 formed on crossmember 50 of bridge 49 is set into, for instance, by means of disk cam, extensible container is unlocked. EFFECT: provision of accurate alignment and locking in position, reduced cost of manufacture. 10 cl, 6 dwg
