Kesehatan Kerja Pemakai Bike Lift Buatan pada Bengkel Sepeda Motor Konvensional di Kotamadia Padang

Background: Maintenance of motorcycle is undertaken bymechanics of authorized and conventional garages.Mechanics of authorized garage use standing position(standard working position), mechanics of conventional garageuse squating position. Either standing or squating position arestatic working position that does not meet the requirement ofhealthy work.Objective: The study aimed to improve static position andsitting-standing position (dynamic position) using bike lift ofmotorcycle with device for sitting.Method: The study was experiment that used pretest-posttestEquivalent Group Design. Location of the study wasconventional garage at Jalan Hercules No. 2 Tanggul Hitam ofPadang Municipality. Subject of the experiment consisted of 16mechanics of conventional garage (16 people) and subject ofcontrol consisted of 16 people of Honda Main Dealer (C.V.Hayati) at Jalan Pemuda 35 Padang. The dependent variableswere weight assessed using Digital Camry Scale, strength ofhand muscles assessed using Dynamometer, workload withpulse indicator assessed using Personal ECG Recorder EP-200©, fatigue with indicator of blood lactate acid assessedusing Accutrend® Lactate. Statistical analysis to identify thedifference used covariance analysis and t-paired test to identifythe difference.Result: 1) There was significant difference in weight betweendynamic position and standard position (p<0.05). Decrease ofweight in dynamic position was less than in standard position,2) there was significant difference in strength of hand musclebetween dynamic position and standard position (p<0.05).Decrease of strength of hand muscle in dynamic positive wasless than in standard position, 3) there was significantdifference in pulse between dynamic position and standardposition (p<0.05). Increase of pulse in dynamic position waslower than in standard position, 4) there was significantdifference in muscle fatigue between dynamic position andstandard position (p<0.05). Increase of muscle fatigue indynamic position was less than in standard position.Conclusion: Dynamic position, viewed from changes invariable of weight, strength of hand muscle, workload, andmuscle fatigue, was better than standard position. Thereforeit was suggested to use dynamic position while working. Forthe government recommended: a). Increasing cooperationamong all motorcycle mechanic in improving the health andsafety, help motorcycle mechanic on preventive and promotiveso avoid accidents. b). Promote and integrate safety and healthprogram between formal and informal mechanics that can beof mutual benefit in the form of increased productivity andresearch and further studies and approaches and the beststrategy to improve the health and safety.Keywords: weight, strength of hand muscle, pulse, fatigu

Rancang Bangun dan Kinerja Mesin Pengupas Sabut Kelapa Muda

Mesin pengupas sabut kelapa muda berfungsi untuk mempermudah dalam mengupas kelapa muda karena cukup efektif dibanding cara manual. Penelitian ini bertujuan untuk merancang dan uji kinerja mesin pengupas sabut kelapa muda. Hasil pengujian menunjukan kapasitas pengupasan mesin adalah 120 buah/jam. Analisa ekonomi mesin pengupas sabut kelapa muda didapat biaya tetap Rp 1.793.220 /tahun, biaya tidak tetap Rp 16.943/jam, biaya pokok Rp. 147/buah dan break event point (BEP) sebanyak 4.995 buah/tahun