構成木結構的構件，如果在三個主要視圖中都無法呈現實際長度，即稱為複斜構件；如果在某一視圖中能呈現實際長度，而在其他視圖中不能呈現實際長度，即稱為單斜構件。木工複斜構件的繪製相當煩瑣，要一一求其實際長度，然後才能放樣施工，是製圖工作中困難度相當高的一個項目。雖然目前許多行業的造形設計及繪圖工作都已進步到以數位三維建模方式來解決問題，但還是有些傳統的行業仍舊以手工繪圖方式進行。例如國際技能競賽中的建築木工職類即是如此。競賽時，選手們仍須跪趴在兩片大夾板併成的繪圖板上進行1:1的繪圖放樣工作，困難度相當高，也容易犯錯（實際長度求取錯誤）。本研究的目的即在於針對複斜木結構造形的設計、繪圖及施工方面的技術，尋求一套以電腦輔助三維繪圖軟體為核心的全方位解決方案，期能以較簡易而迅速的方式設計及繪製複雜的複斜木結構造形，並完成每個構件的正垂三視圖，以供給後續的放樣及施工之用。期能大幅提高整體工作效率，縮短工作時間（按國際技能競賽建築木工職類完成一件作品，須費時四個工作天）。本研究的成果，除可供業界使用，提昇複斜木結構造形之設計及施工品質，亦可建請勞委會職訓局中部辦公室競賽科將此行業技術列為全國技能競賽項目及訓練技術標準。如果在國內試行無礙，便可進一步推廣至國際技能競賽。 The purpose of this study is to discuss the problems of designing, drawing and making of complex-sloped wood structure and develop a total solution for them based on a computer 3D graphic application. A component of a wood structure, which doesn’t show its true size in all of the orthographical projection views, is called a complex-sloped component. While a component which shows its true size in only one of the orthographical projection views is called a single-sloped component. To acquire all the true length of a complex-sloped component is a difficult task for designers and drawers. Although recently, many industries are using 3D computer graphic application in designing and drawing, some industries or skill areas are still relay on hand-drawing. For instance, the competitors of carpentry skill area in the WorldSkill International Competition still have to squat on the drawing board made of two pieces of full-size plywood to make their drawing. The process is complex and very easy to make mistakes.The purpose of this study is to develop a solution based on a 3D computer graphic application to make the design and drawing process of complex-sloped wood structure much easier and faster. The final drawing should include a three-view drawing with the true-size layout of all components of the wood structure. The drawing will make the following woodworking process easier and more accurate. Hopefully, this solution will make the designing-drawing-making process of complex-sloped wood structures a lot more efficient and shorten the working time (the allocated time for the competition of carpentry skill area in the World Skill International Competition is 4 working days).The achievement of this research can be wildly used among the wood-related industry. Not only it can make the design and drawing process much easier, but also raise the quality of the following woodworking process. The researchers will introduce this solution to The Bureau of Employment and Vocational Training in Taiwan. Hopefully, it can be accepted as a standard technique for the related vocational training programs and the related skill areas of The National Skill Competition in Taiwan. Furthermore, this solution can also be introduced to The WorldSkills International Competition to update the techniques of related skill areas.
