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Kitakyūshū, Japan

Sakaki T.,Kyushu Sangyo University | Iribe T.,Kyushu Sangyo University | Ushijima K.,Kyushu Sangyo University | Sakuragi M.,Research and Development Div | And 2 more authors.
Proceedings of the SICE Annual Conference | Year: 2010

Diseases such as ALS and SMA often cause motor disabilities by progressive loss of muscle power. However, some patients must lie horizontally and thus cannot operate a wheelchair. We have developed a robotic stretcher for an SMA patient who wanted to operate it to move around buildings by herself. The aim of this study was to develop a robotic stretcher for an SMA patient with severe motor disabilities to enable her to maneuver independently inside a building. In the concept of the stretcher, the user can drive the stretcher using an applicable operating device while watching a display feed from cameras mounted on the stretcher. We have developed some new devices with operating algorithm suitable to the user's limited abilities (motion in only one finger), and verified their functions by tests with miniature robot models. The control system and mechanism were also explained. We show some experimental results using miniature models and the prototype machine, and results of a risk assessment of the prototype machine. © 2010 SICE. Source

Iizuka K.,Research and Development Div
Furukawa Review | Year: 2014

Polymeric materials include various additives according to the demand characteristics required. It is important to conduct the qualitative and the quantitative analysis of these additives for the purposes of the product design and the quality control. On the other hand, the demand characteristics of polymeric materials have become more sophisticated and complicated in recent years, leading to the improvement and the development of additives, thus, increasing the number of cases where the conventional technology is not sufficient for the analysis. Through the usage of pyrolysis-GC (Gas Chromatograph)/MS (Mass Spectrometer) /FPD (Flame Photometric Detector) system with purged splitter installed at the end of the column during the analysis of additives in polymeric materials, which enables the simultaneous detection through MS and FPD, we were able to more easily identify the additives which included phosphorus and sulfur in their structure, as compared with the conventional pyrolysis-GC/MS method. Consideration to the determination of the precision was also given, and it was found that the results were better than those using MS detectors. Source

Kim J.-K.,Research and Development Div | Kawanaka H.,Research and Development Div
Furukawa Review | Year: 2014

A large amount of flame retardant is required for high flame retardance of polymer materials, but their physical properties are remarkably lowered. Meanwhile, a demand for the halogen-free flame retardant that does not allow the generation of toxic gases during combustion has been strongly required. But, so far, the halogen-free flame retardant having a performance as high as the halogen flame retardant is not available. Here we propose the nanoencapsulation technology of the halogen-free flame retardant as one promising method to achieve a high flame retardant effect with a small amount of a conventional flame retardant. We succeeded to nanoencapsulate the halogen-free flame retardant in a layered compound by using a co-milling method as a nanoencapsulation technology. We found out that the nanocapsules are co-mixed, with the exfoliated state and the intercalated state in the resin. The results show that the prepared nanocapsule has a good flame retardant effect in spite of a small amount of the flame retardant in the nanocapsule. Also, the synergy effect for the highly flame retardance has been investigated by combining the commercially available flame retardant with the nanocapsule. Then, the cross-linked foam which is highly combustible was applied to confirm the synergy effect, and the material was classified as UL94 V-0. Source

Chiba H.,Research and Development Div | Nishiguchi M.,Research and Development Div
Furukawa Review | Year: 2014

Electric wire for overseas railway rolling stocks is requiring a high abrasion resistance, in addition to a vertical flame resistance, a high heat resistance and a high temperature oil resistance, to withstand vibration and other conditions experienced during railway operation. On the other hand, a thinning of the wire insulation materials is desired for further reduction in weight of railway rolling stocks. Generally, engineering plastic is used as an insulation material, but it has issues with its flexibility and its wire stripability. Using general-purpose polyolefin as a base material for the insulation material and adopting our own technique of polymer materials this time, we have successfully developed a halogen-free insulation material which is also superior in flexibility and in wire stripability, in addition to characteristics equivalent to those of the engineering plastic, and which is reduced its thickness compared to conventional electric wire, and therefore can achieve a reduction of approximately 15-35 % in weight. Source

Hirano J.,Research and Development Div | Sawada Y.,Research and Development Div | Hashimoto D.,Research and Development Div | Ooto S.,Industrial Research Ltd. | Yamashita K.,Industrial Research Ltd.
Furukawa Review | Year: 2014

We have developed a sophisticated double layer insulated electric wire for railway rolling stocks, which has a thin wall and a high mechanical strength. For an electric wire used in railway rolling stocks, thinning of the insulation thickness is required to make the diameter of the electric wire smaller. Even though polyolefin is commonly used as the insulation material of the general-purpose electric wire which is used for domestic railway rolling stocks, if the insulation is simply made thinner, the values of its mechanical strength such as its abrasion resistance and its cut-through property becomes weak, therefore various manipulations are given on the materials. The authors have considered for ensuring the reliability not only of the materials but also of the structures and have developed the sophisticated double layer insulated electric wire which is using a high-strength polyamide for the outer layer. This electric wire has more or equivalent mechanical strength with its half of the insulation thickness when compared to a general-purpose electric wire, and a successfully improved safety. Here, we describe the characteristics of this electric wire. Source

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