常用木墊板之靜曲強度

Static Bending Strength of Commonly Used Wood Pallets

周群

《林產工業》 11卷2期 (1992/06) Pp. 23-41

摘要

本研究探改良之木墊板靜曲試驗方式，探討樹種、型式、面板厚度、桁木寬度及厚度對木墊板最大變形量、最大潛變量及剛性之影響；結果顯示依CNS標準製作之木墊板，若不具肉眼可見之節或嚴重面裂，且除SC型外，均可達最大預定荷重（2394kgf）不致破壞；且最大變形量不超過30mm，最大潛變量小於1mm；各種木墊板之靜曲表現，以冰片樹者最佳，楠木類最差；靜曲強度以D型最強，SC型最弱，且隨面較厚度、桁木寬度及厚度之增大而增加；木墊板依缺點不同而有不同之破壞型式，桁木有節者會突然斷裂，面裂嚴重者，則變形量及潛變量均持續擴大。

關鍵字

木墊板 ； 木墊板靜曲試驗 ； 最大變型量 ； 最大潛變量 ； 剛性

並列摘要

Modified static bending test on wood pallet is adopted in this study to investigate the effects of wood species, deckboard thickness, stringer width and thickness on the maximum deflection, maximum creep amount and stiffness of pallets. Results show that the maximum prescribed load (2394kgf) can be achieved without pallet rupture provide that pallets are free of noticeable knots or serious surface checks and not of se type. The maximum deflection and creep amount of abovementioned pallets do not exceed 30mm and 1mm, espectively. Kapur pallets have the best bending strength, and the pallets made of domestic hardwood species are the poorest. Type D pallets show the best bending strength than the others. The bending strength of pallet increases with increasing deck-board thickness, stringer width and thickness. Defect possessed by pallet controls the pallet rupture mode.

並列關鍵字

Wood pallet ； Static bending test of pallet ； Maximum deflection ； Maximum creep amount ； Stiffness