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Journal of Applied Sciences
  Year: 2014 | Volume: 14 | Issue: 5 | Page No.: 401-414
DOI: 10.3923/jas.2014.401.414
Pinch Effort Variations with Torque, Shape, Size, Sensation and Technique
Poh Kiat Ng, Adi Saptari, Qiao Hui Boon, Meng Chauw Bee, Ka Xuan Chai and Shiong Lung Leh

Abstract:
While there have been some reviews on pinch force and pinch effort variations, it appears that few descriptive studies have been carried out on the variations of pinch efforts with different torque directions, shapes, sizes, tactile sensations and techniques. Hence, this study aims to explore the pinch effort variations with torque, shape, size, sensation and technique. Six screw knobs were developed and assessed with the participation of workers from a furniture manufacturing firm. The ratings on the efforts to pinch and turn the knobs were collected using surveys and analysed with reliability and descriptive analyses. From the results, the 5-lobes knob for both large and small sizes required the lowest pinch effort, while the spherical knob for both sizes required the highest pinch effort. The larger knobs required more turning effort than the smaller ones. The 3-jaw chuck turned out to be the most effortless pinch technique while the pulp-2 pinch required the most effort. Wearing nitrile gloves decreased pinch efforts, while wearing cotton gloves increased them. It also took lesser effort for the knobs to be turned in a clockwise torque direction compared to a counterclockwise direction. This study serves to improve the understanding on pinch force capacity with hope that workers can avoid overestimating or underestimating their efforts when pinching certain objects.
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How to cite this article:

Poh Kiat Ng, Adi Saptari, Qiao Hui Boon, Meng Chauw Bee, Ka Xuan Chai and Shiong Lung Leh, 2014. Pinch Effort Variations with Torque, Shape, Size, Sensation and Technique. Journal of Applied Sciences, 14: 401-414.

DOI: 10.3923/jas.2014.401.414

URL: https://scialert.net/abstract/?doi=jas.2014.401.414

 
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