著者

近藤 司 清水 つばき

出版者

函館工業高等専門学校

雑誌

函館工業高等専門学校紀要 (ISSN:02865491)

巻号頁・発行日

vol.49, pp.7-12, 2015

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A lot of structures, such as a bridge, a tunnel, an expressway and a steel tower, which give the damage to the society by the destruction exist in this country. The safety inspection of the bolt used for those joining part is the work on which a lot of time is spent and is high-cost. The sensor which could easily visualize a destruction risk was developed by this study. The sensor consists of the first material, the second material and spring. The second material is installed for the first material in parallel, and one end is fixed. The second material has a fragile characteristic than the first material, under the elastic deformation or plastic deformation. When a joining part is deformed by external force, the first material also is deformed. Then, the second material breaks and jumps out by the spring force to outside. Therefore the destruction risk of the junction can be visualized. The destruction detection system was developed by converting an electrical signal by a switch with the signal that the second material protruded. The break of the second materials was able to be confirmed as electrical signal by a simple experiment.

著者

川崎 清貴 溝口 知広 小林 義和 白井 健二 近藤 司

出版者

公益社団法人 精密工学会

雑誌

精密工学会学術講演会講演論文集 2011年度精密工学会春季大会

巻号頁・発行日

pp.189-190, 2011 (Released:2011-09-01)

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本研究においては,自由曲線を構成する点群を,必要精度内で円弧近似させ,NCデータ量を削減し,工作機械の加工時間を短縮させることを目的としている.今回、NCデータを削減する手法として円弧近似法を用いた.この手法は,自由曲線を必要精度内で最小二乗法を用いて,円弧に当てはめるものである.この手法を用いた結果、総点群数を約6分の1、NCデータ量を約5分の1に削減できた.また、実際の加工により、その精度を検証した.

著者

秋山 寛治 近藤 司

出版者

West-Japanese Society of Orthopedics & Traumatology

雑誌

整形外科と災害外科 (ISSN:00371033)

巻号頁・発行日

vol.43, no.1, pp.276-278, 1994-03-25 (Released:2010-02-25)

参考文献数

3

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We reviewed the complications developing after treatment with wire traction for femoral neck fractures in thirty elderly female patients ranging in age from 69 to 90 years. Eight cases of wire movement, six cases of local infection, and nine cases of psychological symptoms were recorded during traction. Regarding the mobility of knee joint and quadriceps muscle power at four weeks postoperatively, no significant difference was found between traction through the distal part of the femur and the tibial tuberosity.

著者

近藤 司 岸浪 建史 斎藤 勝政

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.54, no.5, pp.971-976, 1988-05-05 (Released:2009-10-08)

参考文献数

2

被引用文献数

5 14

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This report describes how to create an offset surface between any tool shapes and machining surface to a necessary level of accuracy in 3 axis machine tool. It is able to consider that the machining surface is constituted by many elements, which are cutting points. An offset surface between the tool shape and an element is able to define as a reversed tool shape with Z-direction. Accordingly, the offset surface of the machining surface may be regarded as an envelope which is obtained by set operation of offset surfaces for those elements. In order to execute these set operations by computer, a spatial array is employed as a memorizing area of the offset surface. And also in order to save memory capacity, a quad-tree data structure is employed.

著者

近藤 司 住吉 卓真

出版者

函館工業高等専門学校

雑誌

函館工業高等専門学校紀要 (ISSN:02865491)

巻号頁・発行日

vol.47, pp.19-24, 2013

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The purpose of this research is to develop an automatic positioning device for drilling process using a stereo camera picture. Developed device is constituted by two camera and NC table of two-axis. This device uses a mounting to drilling machine. Three-dimensional coordinate is calculated from two pictures photoed with the tip of a drill and punch mark are automatically positioned. In this paper, we described the development of a measuring device and a method to calculate the three-dimensional coordinate for a drilling position, and the evaluation of the precision on the measuring device by experiment.