可行之二至四摺摺疊傘機構抗風能力之分析

本研究乃是藉由ADAMS軟體模擬評比出具有較佳抗風能力之摺疊傘收摺機構的構型。針對六桿七接頭、八桿十接頭與十桿十三接頭合成出之可能的二摺至四摺傘收摺機構簡圖，透過ADAMS軟體做尺寸設計以建構出其對應的模型，再對建構出之模型的尾桿末端施加各種不同風向的50N風力，進行抗風能力的模擬分析，藉此評比出抗風能力較佳的摺疊傘收摺機構的構型。本文以單滑件系統跟雙滑件系統分類摺疊傘收摺機構，模擬各種不同收摺機構承受風力的狀態下，以收摺機構中產生之最大接頭反力為依據，評比出單滑件二摺傘、單滑件三摺傘、單滑件四摺傘、雙滑件二摺傘與雙滑件三摺傘中具有最佳抗風能力的收摺機構。此外，本研究也發現，收摺機構中之平行四連桿組的桿件尺寸會影響摺疊傘之抗風能力，並提出關於此平行四連桿組桿長設計的原則，以供設計最佳抗風能力的收摺機構構型。

關鍵字

摺疊傘；收摺機構；接頭反力；抗風能力； ADAMS

並列摘要

This study presents the evaluation of the capability of wind load for the possible folding mechanisms of two-section to four-section folding umbrellas through ADAMS software. Firstly, all the kinematic diagrams of possible folding mechanisms synthesized from six-link-seven-joint, eight-link-ten-joint and ten-link-thirteen-joint are built in ADAMS under the same conditions of horizontal projected area. Then, a varied-direction wind force of 50 N is applied at the end of the tail link of each possible folding mechanism. The criterion for evaluating the capability of wind load between those mechanisms is the maximum reaction force at joints of each mechanism. The one with minimum maximum reaction force at joints is the best folding mechanism. The obtained results show that the best configuration of folding mechanism for single-slider two-section is 3(M,5), the best configuration of folding mechanism for single-slider three-section is 7(M,13), the best configuration of folding mechanism for single-slider four-section is (4c), the best configuration of folding mechanism for double-slider two-section is 9(M,1), and the best configuration of folding mechanism for double-slider three-section is (17f). In addition, this study also found that the dimensions of parallel four-bar linkage in the folding mechanism play a significant role regarding the capability of wind load. The design principles for the parallel four-bar linkage in the folding mechanism have been presented. The results of this study could be useful for the design of folding mechanism with optimum capability of wind load.