Research into Corner L Separable Assemblies in Storage Furniture

This research is based on the testing of the impact of the board (particleboard and medium density fiberboard (MDF)) and hardware type used to connect the sides and the bottom or top of the storage furniture on the joint strength. The hardwares of the following trade mark were used: the confirmat screw, Minifix, Maxifix, Stablofix, RV and Solo 32. Such hardwares make it possible to disassemble the furniture as well as to assemble it (when moving the furniture) without reducing joint strength when reassembling it due to wear and tear on the material (with the exception of the confirmant screw). Research results showed that assemblies with the Maxifix hardware installed in the MDF base exhibited the highest values of bending moment (the average bending moment of 85.88 Nm). On the other hand, assemblies with the Minifix hardware installed in the particleboard exhibited the lowest values of bending moment (over three times lower than the Maxifix) (the average bending moment of 24.50 Nm). Assemblies with the confirmat screw exhibited satisfactory results, although, aesthetic requirements seem to be the main problem here (the average bending moment of 40.38 Nm for the particleboard and of 64.24 Nm for the MDF).
Istraživanje se temelji na ispitivanju utjecaja vrste drvne ploče (iverice i MDF ploče) i tipa okova koji služi za povezivanje stranice i poda ili stropa namještaja za odlaganje na čvrstoću kutnog spoja. Kao spojni okov rabljeni su oni trgovačkog naziva confirmat vijak, minifix, maxifix, stablofix, RV i solo 32. Navedeni okov omogućuje rastavljanje i sastavljanje namještaja (npr. prilikom selidbe namještaja) a da pri ponovnom sastavljanju ne bude narušena čvrstoća spoja zbog habanja materijala (izuzetak je confirmat vijak). Prema rezultatima istraživanja, najveće vrijednosti momenta savijanja zabilježene su u sastava s maxfix okovom ugrađenim u podlogu od MDF ploče (prosječni moment savijanja 85,88 Nm). Najmanje vrijednosti momenta savijanja (preko tri puta manje u usporedbi s maxifixom) izmjerene su za sastav s minifix okovom koji je ugrađen u ploču ivericu (prosječni je moment savijanja 25,40 Nm). Spojevi s confirmat vijkom pokazuju zadovoljavajuće rezultate momenta savijanja, ali su estetski zahtjevi glavni problem tog načina povezivanja elemenata (prosječni moment savijanja za troslojnu ploču ivericu iznosi 40,38 Nm, a prosječni je moment savijanja za MDF ploče 64,24 Nm).