著者

河村 隆 山藤 和男 小林 剛

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. C編 (ISSN:03875024)

巻号頁・発行日

vol.57, no.544, pp.3895-3900, 1991-12-25

被引用文献数

4

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The authors developed a 3D moving robot 'ROBOT CAT' which could control its posture in the air and could perform soft landing. This paper describes the control method of the ROBOT CAT and the experimental results. An animal cat can control its body by turning motion when released upside down from a high place. In order to realize this turning motion, the ROBOT CAT was consisted in two parts (anterior and posterior body) connected with a flexible backbone which has two degrees of freedom of motion. The backbone proposed in this paper operates on two pairs of artificial rubber muscles driven by compressed air. It is possible that this motion is applied to the posture control of astronauts and space structures.

著者

小林 吉之 嶺 也守寛 藤本 浩志

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.73, no.725, pp.274-279, 2007-01-25 (Released:2011-03-04)

参考文献数

14

被引用文献数

1 1

---

To determine the accuracy of foot position sense in the means of foot placement, young adults were asked to place either medial edge or lateral edge of their feet along the base line on the floor as close as possible, and the edge of placed feet were scanned by using laser displacement gauge. From the collected data, constant error, the distances between the edge of placed feet and the base line on the floor, and absolute error, the absolute distances between the edge of placed feet and the base line on the floor were defined and compared between the medial or lateral trials, and dominant leg or indominant leg. The statistical analysis showed significant differences of constant error between the trials only. The trials to place their medial edge tend to place their feet away from the base line, and the trials to place their lateral edge tend to place their feet in to the base line. These results indicate that we tend to expect the position of our feet more medially than actual, and these discrepancy may be one of a reasons of tripping or banging of our feet to the obstacles while walking.

著者

永瀬 和彦 中村 英男 小林 秀之

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.56, no.523, pp.797-802, 1990-03-25 (Released:2008-02-21)

参考文献数

4

被引用文献数

1

---

The authors constructed "slipping adhesion test bogie" designed upon a new idea of measuring the coefficient of adhesion continually while running, and have observed the state of adhesion on main lines since 1985. Recently, they placed a car equipped with this bogie on a steep line where wheel-spin and skidding of rolling stock had been frequently the cause of troubles. As the result of runs of the car under various weather conditions such as fine, fog, snow, sleet and frost, influence of the weather condition upon the adhesion between rails and wheels has been made clear and evaluated quantitatively.

著者

堤 一郎

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.74, no.746, pp.2387-2395, 2008-10-25 (Released:2011-03-04)

参考文献数

17

---

Wooden carriage manufacture of Japanese Imperial Government Railway (J. I. G. R.) Works and Japanese young railway engineer cultivation in the Meiji period are described. In the start of J. I. G. R.'s transport business, 143 rolling stocks were imported from the U. K., and English railway engineers were employed. They cultivated Japanese young trainees through the construction of wooden carriages by themselves on the job training. A drawing of Adams bogie track with Munsell wheels, brief personal record of four English railway engineers and three Japanese young engineers were explained. Mechanical Engineering Heritage of four wooden carriages preserved in Japan are introduced, too.

著者

佐藤 勇一 三浦 秀一 辻岡 一明

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.70, no.694, pp.1566-1572, 2004-06-25 (Released:2011-03-04)

参考文献数

9

---

This paper describes the experimental and analytical study on the parallel orientation of pins by sinusoidal vibration. A pin with a point at one end and a small spherical head at the other on a horizontally vibrating table is oriented in the direction parallel to the vibration. As long as the vibration amplitude and its frequency are appropriate, reorientation phenomenon occurs. Analytical study shows that the orientation depends on the magnitude of the maximum vibration speed of the table, that is, amplitude times frequency. The sense of the orientation of a pin depends on the initial condition.

著者

濱島 京子 柿倉 正義

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. C編 (ISSN:03875024)

巻号頁・発行日

vol.63, no.607, pp.967-974, 1997-03-25

被引用文献数

14

---

Research on labor saving and automation of housework by robots is proceeding rapidly due to the increasing population of aged persons and improved electronics in houses. The special problems concerning housework robots are the enormous complexity of the working environment and huge number and variety of objects in a house. Therefore the recognition function of the robot is desired to be highly independent of the working environment. Moreover, the robot should be able to treat various kinds of "nonsolid-form objects" in a house. The object of this research is to develop the technology by which a robot can handle nonsolid-form objects, particularly clothes. The final goal of the research is the creation of a housekeeping robot which can put unarranged clothes into order at a specified place. Some of the concrete subtasks of this job are taking out one form of clothes and expanding, classifying, folding and putting it in the specified place. In this paper we propose a planning strategy for the task of the unfolding clothes.

著者

野島 武敏

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. C編 (ISSN:03875024)

巻号頁・発行日

vol.67, no.657, pp.1669-1674, 2001-05-25

被引用文献数

6 1

---

This paper describes the folding/wrapping methods of thin flat circular membranes by using folding patterns prescribed by combining two groups of equiangular spirals. By using both folding conditions at nodes and continuous conditions of equiangular spiral type folding lines in the membranes, 2 kinds of folding patterns have been analytically designed ; (1)folding patterns consisting of pseudo equiangular spiral (zigzag type spiral) and equiangular spirals, and (2) folding patterns consisting of two groups of equiangular spirals. The availability of present folding/warpping methods of thin circular membranes has been verified by manufacturing paper and very thin metal sheet samples.

著者

小柳 志郎 吉岡 毅泰

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.53, no.492, pp.1728-1734, 1987-08-25 (Released:2008-02-21)

参考文献数

4

---

The wavelength of hunting motion is one of basic quantities expressing the hunting motion characteristics of a railway vehicle. Though formulae for a single wheel-set and a rigid truck are well known, they are not applicable to a soft truck, in which horizontal suspension stiffness between the axle box and truck frame is small. In this paper, an approximate expression for the wavelength of a soft truck is presented and verified with measured data.

著者

干場 恵美子 稲垣 照美 木村 尚美 阿部 宣男 宮内 一美

出版者

The Japan Society of Mechanical Engineers

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.72, no.714, pp.409-417, 2006

被引用文献数

1

---

The fantastic light of firefly, which keeps fascinating the heart of Japanese from ancient time, and the ecosystem are taken up as one of cure fields being benefit from the nature. In this study, from a viewpoint of Kansei engineering, we focused on the hue of light emission pattern of firefly, and we examined whether it causes the human spirit any effects or not by using various statistical analysis and Kansei analysis. It was revealed that there is a high possibility that the sufficient cure effect exists in the hue of light emission pattern of firefly and the ecosystem. This research is the first basic trial turned to the creation of cure spaces for hospice and welfare facility, which utilize the firefly and the mini ecosystem artificially modeled in an enclosure.

著者

鈴木 孝 柿 賢一 高橋 豊弘 中西 正義

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. C編 (ISSN:03875024)

巻号頁・発行日

vol.74, no.746, pp.2403-2410, 2008-10-25

参考文献数

22

---

Hitachi Aero Plane Co. former Tokyo Gas Electric Industry Co. (Gas-Den), who also predecessor of Hino Motors, Ltd. developed an unique radial 22 cylinder aero-engine "HA51" by order of imperial army at the time of later period of the World War II. Although the engine could not be applied to test flight due to the end of the war, it has some advanced design features. For searching the design and the philosophy of this engine, brief history of the Gas-Den aero-engines was described in first part on this paper. That includes Japanese first own designed unique Shimpu (or Jimpuu) in 1928, Tempu (or Amakaze) and also Military Tank engine and others. The "HA51" engine was compared with "Homare" one of the Japanese high power engine and American P & W R2800. Unfortunately, some hypothesizes have to made on the engine, because it was missing at the war's end.

著者

下山 勲 三浦 宏文 光石 衛

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.49, no.444, pp.1372-1381, 1983-08-25 (Released:2008-02-21)

参考文献数

8

被引用文献数

5 6

---

竹馬形歩行ロボットBIPER-3の制御理論を発展させて,ロール軸及びピッチ軸まわりに人間並みの自由度を有する二足歩行ロボットBIPER-4の歩行実験を行った。BIPER-4の倒立振り子運動モードを利用したソフトウェアによる制御器が構成され,これを使って,足首部のトルクを小さくおさえるとともに一歩に要する時間が0.3秒程度の速い歩行が実現された。

著者

須田 義大 松岡 茂樹 小川 雅

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.63, no.611, pp.2329-2336, 1997-07-25 (Released:2008-02-26)

参考文献数

8

---

This paper presents a quantitative evaluation method for seat arrangements in commuter railway cars. The purpose of the study is to evaluate seat arrangements based on passenger comfort and accessibility, which are important during train operation. To determine the unknown parameters in the function, experimental examination was done. A full-scale mockup with variable seat arrangements was manufactured. It was modeled on a 20 m-long car with four or six doors per side, because a choice of the door arrangement is one of the main parameters. Using this mockup, comfort and accessibility were measured for ten types of seat arrangements. The results of the proposed evaluation functions using computer simulations agreed with measured experimental results. Applying the evaluation method to several seat arrangements, it is found that the most suitable seat arrangement depends on the average boarding time of passengers. From the evaluated results, suitable seat arrangements for commuter trains are discussed.

著者

白國 紀行 谷村 正治 宮崎 文夫

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.72, no.716, pp.1021-1027, 2006-04-25 (Released:2011-03-04)

参考文献数

4

---

Among high-speed railway systems, the superconducting maglev train is an innovative transportation system, in which trains are levitated and driven at speeds of up to 550 km/h. But in case of quench of superconducting magnet, vehicles are forced to touch down on the guideway. For safe landing, we developed the new equipment named “Emergency Wheel”. Our process of development is as follows : (i) To know the maximum load for the landing, we simulated the electromagnetic power and dynamics of vehicles. (ii) Each element of emergency wheel was developed and tested in a factory. (iii) Quench tests were conducted on the Yamanashi Maglev Test Line and results showed a good accordance between simulation and test. Through the study and development of emergency wheel, we established a design method of safety equipment for Maglev.

著者

冨田 信之

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. C編 (ISSN:03875024)

巻号頁・発行日

vol.61, no.583, pp.922-929, 1995-03-25

---

When a rocket is launched by a rail launcher, the rocket receives tip-off angular velocity caused by the moment due to engagement of the tail hanger of the rocket on the rail after clearance of rocket C.G. from the tip of the rail. This paper analyses one occasion, when small test rocket launched from a rail launcher experienced unexpected large pitch-down tip-off angular velocity. The rocket had two hangers, one of which was constrained by a detent mechanism prior to launch. When the rocket motor was fired, detent action caused torsional deflection of the shaft, which supported teh rail launcher. When the hangers got free, the shaft started oscillatory motion, which amplified the tip-off angular velocity of the rocket. Analysis of the dynamics of the rail launcher and the rocket was performed and numerical calculation was made to simulate the tip-off velocity. Measures for improvement were summarized.

著者

潤賀 健一 小倉 彰 長田 実 永瀬 和彦

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.56, no.530, pp.2825-2830, 1990-10-25 (Released:2008-02-21)

参考文献数

3

---

Much difficulty has been encountered in cooperative traction of electric railcars and diesel railcars, because the structure and performance of the respective control systems are very different. Diesel railcars are characterized by more or less constant output from the initial to middle speed range and constant torque beyond the middle speed range. Electric railcars are characterized by virtually constant torque from the initial to middle speed range, with the output decided by notch order beyond the middle speed range. The authors propose a new control system for cooperative traction based upon an entirely new conception. This system changes a general notch order into a suitable notch order for the diesel railcar depending on the electric railcar's speed. The system was mounted on JR's electric and diesel railcars and tested on the main line of JR KYUSYU. Based on this test result, introduction of the system in commercial service was decided upon and practical operation began on April 29, 1989.

著者

鈴木 孝 柿 賢一 高橋 豊弘 中西 正義

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.74, no.746, pp.2403-2410, 2008-10-25 (Released:2011-03-04)

参考文献数

22

---

Hitachi Aero Plane Co. former Tokyo Gas Electric Industry Co. (Gas-Den), who also predecessor of Hino Motors, Ltd. developed an unique radial 22 cylinder aero-engine “HA51” by order of imperial army at the time of later period of the World War II. Although the engine could not be applied to test flight due to the end of the war, it has some advanced design features. For searching the design and the philosophy of this engine, brief history of the Gas-Den aero-engines was described in first part on this paper. That includes Japanese first own designed unique Shimpu (or Jimpuu) in 1928, Tempu (or Amakaze) and also Military Tank engine and others. The “HA51” engine was compared with “Homare” one of the Japanese high power engine and American P & W R2800. Unfortunately, some hypothesizes have to made on the engine, because it was missing at the war's end.

著者

島村 真介 須賀 一博 江澤 良孝 青木 繁

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. C編 (ISSN:03875024)

巻号頁・発行日

vol.73, no.729, pp.1480-1485, 2007-05-25

被引用文献数

1

---

Impact characteristics of a cue in billiards are evaluated numerically by developing a simple method. It is assumed that the cue and ball are elastic and rigid, respectively. The displacement of the cue is evaluated by the finite element method and that of the ball is calculated by solving the equation of motion. The time variation of impact force is estimated by equating these displacements at contact point. The accuracy of the analysis is checked by performing a detailed finite element analysis and an experiment, in which a freely supported cue is hit with a swinging ball. It is shown that (1) the impact force and the ball velocity increase with increase in the stiffness of the shaft, (2) the contact period decreases with increase in the stress wave velocity in the cue, (3) with increase in the stiffness of the tap, the impact force rises rapidly, reaches a large maximum value and falls in a short time (4) the ratio of slip to rotation of a ball during the contact period increases with increase in the stiffness of the shaft and the tap and (5) a peak appears in the time variation of impact force for a soft shaft due to the metal screw in the middle of the shaft.

著者

小野寺 英輝

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.74, no.746, pp.2371-2378, 2008-10-25 (Released:2011-03-04)

参考文献数

14

---

In Japan, western technology was rapidly introduced from the last stage of the Edo era. However, a lot of examples of technology transfer failure were included in the process. This paper deals with the cause of failure of the Kamaishi national iron mill. Lack of the domestic pig iron demand and insufficient marketing research, the Kamaishi iron mill generated large amount of deficit and was the greatest failure at that period. Analyzing several remained documents, it was under-stood that Japanese engineers throw large raw ore into the furnace under operation, to make it blockade. It was the simplest way to avoid further financial loss, and to conceal serious carelessness of preliminary survey. Blockage of the furnace was not the main factor of the iron mill business discontinuance, however, it had significant meaning. It was useful to minimize the initial risk of the following private enterprise, which succeeded the iron mill management. And it had big influence in iron manufacture which had grown up to the Japanese key industry in modern ages.

著者

木澤 新吾 灰塚 正次 田所 浩

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.70, no.699, pp.3339-3346, 2004-11-25 (Released:2011-03-04)

参考文献数

16

---

The friction loss and noise of gears has been studied for along time, but it has not yet been made clear. Moreover, JIS gear accuracy class is not necessarily linked with the performance operation of gears, and hence it is important to find the relations between the tooth form accuracy and performance of gears. In the present study, we carried out the experiments to obtain the influence of tooth profile error on the friction loss and noise of spur gears. Nine kinds of tooth profile error with grinding with the similar error amount were used and also we prepared a barrel polished gear which had tip relief by grind. Test results showed that tooth profile error shapes affect the friction loss and noise very much even if the amount of error is the same. Further, it was found that the friction loss and noise have a certain correlation with each other and a barrel polishing showed the lowest friction loss and noise.

著者

木村 仁 遠藤 真美 小関 道彦 伊能 教夫

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 C編 (ISSN:03875024)

巻号頁・発行日

vol.74, no.740, pp.806-813, 2008-04-25 (Released:2011-03-04)

参考文献数

17

被引用文献数

1 2

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A phenomenon that passengers are getting sleepy is often found in running cars or trains. If a mechanism can reproduce this phenomenon, it is feasible to put insomnia patients or infants to sleep without any harmful effects. This will bring extreme benefit for insomnia patients or parents of babies. The purpose of this study is to elucidate the sleep-inducing factors of running cars or trains, and the final goal is to develop a machine which reproduces the environment to put people to sleep. For the first step of this study, we investigated the relationship between sleepiness and vibrations on several trains. The sleepability of each train is discussed by the ratio of sleeping passengers. According to the vibration analyses, the results suggest that comfortable vibration for sleep has mainly low-frequency (2 Hz) vibration with particular fluctuation. In addition, it is also guessed that low level jerks contribute the sleepability.