Takai Yuka

自動車修理における塗装技術者には高い技術・技能が求められるが、熟練技術者の技が誰にでも分かる形式値として広く知られているとは言い難い。そこで本研究では、3次元動作解析装置を用いて、熟練技術者のドアパネルへのブロック塗装におけるスプレーガンの扱い方を明確化することを目的とした。技術者がスプレーガンの操作条件の選択を行える「吹き付け距離」、「吹き付け角度」、「運行速度」、「塗り合わせの間隔」の4項目に着目した。本報告では「吹き付け角度」、「塗り合わせの間隔」の結果を示し、先行研究にて示した「吹き付け距離」、「運行速度」の結果を交え、既刊の塗装マニュアルとの比較・検証を行った。この結果、熟練者はドアパネル上部、中央部、下部のそれぞれの部位において、ドアパネルの面に垂直に塗料が吹き付けられるように、スプレーガンのノズルの向きを変化させ、約40mmのノズル間隔で塗り重ねていることがわかった。

The repair of a damaged car doesn't have the same situation. The repair of a damaged car needs individual way and work by hand. It's necessary to advance work for the car repairing engineer with progress of automotive material. An analysis of car repair expert's motion plays the important role in craftsman upbringing. Therefore, the goal of this study is development of the learning system for car mechanics using analyzing the technique of the craftsman. In this study, the hitting motion by hammer of expert's sheet-metal molding process for automobile repair were analyzed and compared with those with non-expert. As a first step, this paper intends to clarify the characteristic motions of experts. We measured the motions of the skilled and unskilled during car repair the sheet metal molding using the 3D digital motion analysis equipment, and then analyzed the results.

The goal of this research is the development of a learning system for the sheet-metal molding task carried out in automobile repair. In this study, the characteristics of expert's sheet-metal molding process for automobile repair were analyzed and compared with those with non-expert. Work time of "Hammering", "Other of hammering and judge", "Total" of expert was significant shorter than that of non-expert. The experts were used just one kind hammer at hammering process.

In Japan, there is the traditional dyeing method named "Yuzen-zome". Generally, "Yuzen-zome" can be classified into five types: hand-drawn Yuzen, kata Yuzen (i.e., dyed with paper patterns), screen printed, machine printed, and inkjet dyeing. Among them, the representative example is the hand-drawn Yuzen which whole production process is performed by handwork. In the Japanese dress industry, it is said that the workers need to spend much time, since they can evaluate many designs and values of kimono clothes. In this research, the workers of the Japanese dress industry to actually see goods, and we observed where they evaluated.

The hanging scroll is a traditional mounting format for paintings and calligraphy. The scroll must be hung straight when it is displayed, and rolled up smoothly when it is stored. For making this two function be possible, the scroll maker used wash papers and a starch paste for lining. The paste is usually diluted with a water and it cannot have the enough adhesive power. And the mounter uses the special pounding brush for getting the strong adhesiveness. In this study, an adhesive effect of the diluted paste and pounding technique will be researched with using a peeling test.

Hand lay-up fabrication has been used for forming composite structures since ancient times as it can be performed as long as the mold, skills, and materials are available. On the other hand, the hand lay-up fabrication work itself relies on human skills, which means that the finish differs according to the operator carrying out the work, the quality of the product differs among parts depending on the ease of forming, and that defects such as bubbles tend to occur easily. In this study, the experiment quantified techniques that are not visibly apparent and considered to be tacit knowledge.

The goal of this research is development of learning system for automobile repair. In this study, the purpose is characteristics of spray gun handling of automobile repair painting expert. Spray gun movements of 55 craftsmen's were measured by using motion capture system. The spray gun movements of expert were longer length, longer time, higher speed, and narrower swing range, compared to that of non-expert.

Kyoto is a city with a long histoiy, which brings out a serious of traditional craft products, such as 'Kana-ami'---a kind of metal wire network 'Kana-ami' was all made by hand work And the product's quality was judged by the standard structure, which was established and developed in the long course of history and culture That aesthetical standard has already been consistently rooted into Japanese peoples" heart deeply However, the 'Kana-ami' shops in Kyoto have decreased dramatic Therefore, it is urgent time to try to do something to keep this traditional culture wealth In this research, cooperating with "Kanaami Tsuji" workshop, 38 metal wire net products made by 38 students were chosen as the non-expert subjects compared with the excellent products of Mr Tsuji and his son So, the average hexagon angles were treated as the standard in this study All hexagon angles of students' final product were investigated and measured, and averaged value of different oblique weaving line was calculated and compared with corresponding angle standard Based on this structure evaluation system, hexagon angles of Mr Tsuji product showed whole uniform and consistence, which reflected Mr Tsuji' motion stability during weaving process

The technique of making "Kana-ami" is traditional craftsmanship in Kyoto. All wire net fabrications are made by the hand work, so that it is expected that the craft man has the exquisiteness of motion. The purpose of this study is to clarify the characteristics of motion during the weaving the wire nets with different years of experience. The subjects were three males whose have experienced wire netting craftsman for 44 years, 8 years and 0 years respectively. The working environment was reproduced in the laboratory so that the subjects might work usual like working environment as much as possible and they could concentrate on them work. The infrared reflection markers were affixed at 21 points on the body of the craftsman to analyze motion during the wire netting. And six cameras captured the position of each marker, and all markers position data which synchronized were taken in by a computer. In addition, shapes of wire net were evaluated. The shapes of tortoiseshells were evaluated by length of each side.

Kyo-wall is Japanese traditional technology creating calm and natural room atmosphere, supported by natural materials (clay, vegetable fiber and water), human skill and some kinds of trowels succeeded for more than 400years. We have found the significant flow differences of kyo-wall compound according to trowel materials with high speed VTR image analysis. In this report the f unction of the old Mizunaze trowel forged by Japanese sword technology inducing peculiar high flow of Fukakusatsuchi clay and water compound will be presented. The trowel makes smoother surface on coating and after drying than currently forged trowels. The function mechanism of trowel for water based compound will be discussed. This shows that the secret of manual processing with hand made tools for natural materials should be still alive in traditional technologies.

Carbon fiber reinforced polymers (CFRPs) are composite materials with lightweight and high specific strength. As the braided CFRPs have continuous carbon-fiber bundles in their longitudinal direction, they are stronger than conventional CFRPs. In this study, we applied a current-injection-based NDE method using a HTS-SQUID gradiometer to the flat braided CFRPs with and without carbon nanotubes (CNTs), and estimated conditions of the carbon fibers while applying a step-by-step tensile load to the CFRPs. From the results, a possibility to predict an initiation site of the destruction in the braided CFRPs was demonstrated. (C) 2012 Published by Elsevier B.V. Selection and/or peer-review under responsibility of the Guest Editors.

A Japanese paper that is made in Saijo city is called "Saijo-Japanese paper", which is one of traditional crafts in Japan. One of the main characteristics of the Saijo-Japanese paper is a crape structure. The crape structure is made by craftsmen's hand. Weakening demand for the Saijo-Japanese paper is required to create new products by using the Saijo-Japanese paper. The illuminator using Saijo-Japanese paper is proposed as one example. However, light transmission properties of the Saijo-Japanese paper are not clarified. In this study, the crape structures and the light transmission properties of the Saijo-Japanese paper with various making condition were quantified. The light transmission properties were affected by the crape structures.