Agafunga k'urugi rwa ascenseur ni igikoresho cy'umutekano gishyirwa ku nkengero z'urugi rwa ascenseur, gikoreshwa mu kugenzura no kugenzura uko urugi rwa ascenseur ruhagaze mu gihe cyo gufunga. Iyo urugi rwa ascenseur rufunze mu gihe cyo gufunga, agafunga k'urugi kazumva kandi gahita gahagarika igikorwa cyo gufunga urugi kugira ngo rutibasira cyangwa ngo rwangirike.