Arrangement of a circular guide track of an accessory movable in elevation and of its support in relation to a structural element

Arrangement of a circular guide track 10 of an accessory movable in elevation and of its support 20, 21, 22 in relation to a structural element 11, characterised in that the support 20 is engaged in the circular track 10 and is equipped with rolling members 291 arranged substantially at the vertices of a triangle ABC, two sides AB and AC of which form two elements 22 of the support 20 coming from the vertex A of the triangle which is surmounted by the elevation orientation shaft 24 of a mount 30, the latter carrying a means for compensating for the weight of the accessory 40 arranged substantially in the mid-plane of the support passing through this same vertex A. The invention is used for mounting a firearm on a vehicle. AGENCEMENT D'UN CHEMIN CIRCULAIRE 10 DE GUIDAGE D'UN ACCESSOIRE MOBILE EN SITE ET DE SON SUPPORT 20, 21, 22 PAR RAPPORT A UN ELEMENT DE STRUCTURE 11, CARACTERISE PAR LE FAIT QUE LE SUPPORT 20 EST EMBOITE SUR LE CHEMIN CIRCULAIRE 10 ET EST MUNI D'ORGANES DE ROULEMENT 29 DISPOSES SENSIBLEMENT AUX SOMMETS D'UN TRIANGLE ABC DONT DEUX COTES AB, AC CONSTITUENT DEUX ELEMENTS 22 DU SUPPORT 20 ISSUS DU SOMMET A DU TRIANGLE QUI EST SURMONTE PAR L'AXE D'ORIENTATION EN SITE 24 D'UN AFFUT 30, CE DERNIER PORTANT UN MOYEN DE COMPENSATION DU POIDS DE L'ACCESSOIRE 40 DISPOSE SENSIBLEMENT SUIVANT LE PLAN MEDIAN DU SUPPORT PASSANT PAR CE MEME SOMMET A.APPLICATION : MONTAGE D'UNE ARME A FEU SUR UN VEHICULE.