The elevator installed in high rise buildings needs a long traveling cable for its operation. Even though such a long cable is required, the shaft space is limited and the clearance between elevator devices and cable is very narrow. As the elevator also run faster in such buildings, the cable might induce large lateral vibration during a running condition. Therefore, it is very important to evaluate the cable suspension shape and vibration in advance. In this paper, a new cable simulation model is proposed. The model is composed of divided masses and springs. As temperature variation affects the cable shape, the cable physical parameter is expressed by a function of temperature. The proposed simulation model is compared with several experiments, and the results show validity of the model.

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As the Japan Space Elevator Association continues to work toward the realization of a Space Elevator, we held the first Japan Space Elevator Technical & Engineering Competition just outside of Tokyo on the 8th and 9th of August 2009. Participants from Japan and Germany, university and individual competed to see whose battery-powered Climber would be the fastest to ascend a 50mm wide 150m long tether elevated by a helium-filled balloon. This paper describes the detail and results of competition. Also describes the preliminary plan of JSETEC 2010.

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A probe climber for the stratospheric platform means the elevator that is goes up and down the tether lowered from the airship automatically and the atmospheric observation and maintained. In this report, the 150m climbing test were done in order to mechanism of the probe climber for the stratospheric platform is examined. The data collection in a situation near the reality or more of the twist of the tether by the wind etc. that were not able to be reproduced indoors was done. And a construction purpose stratospheric platform, a string-track of the stratospheric platform will be discussed. We also show construction process for a stratospheric platform and its fundamental experiment results by using a probe climber.

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We have developed a new optical door sensor that has a planar detection area with no gap. This sensor has two elongate light sources and two imaging units that are embedded in door posts of an elevator car. The sensor can detect a passenger's finger or a small object and prevent it form being pinched by the doors before door opening and during door closing. Additionally, the elongate light sources blink by red light to alert timings of the door moving to passengers.

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In recent years, social needs of the safety have been growing. It is much the same for elevator doors. However, since there are no safety devices that can detect the object in the form of string, there is possibility of accidents, for example, in case the elevator moves with a lead of dog stuck in the doors. "Door Edge Sensor" was developed in order to reduce these accidents. Although detection of high accuracy is required, we adopted laser sensor and designed the special parts including Reflector, Brush, Door Under Guard. As a result, this device can detect the string that has a diameter of 3mm or more in the full of opening height including the floor. It shall be realized that higher safety would be supplied in the market by using in conjunction with conventional safety devices of elevator doors.

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