Tokyo Electric Power Company Holdings, Inc.

Hitachi Building Systems Co., Ltd.

Furukawa Electric Power Systems Co., Ltd.

Yuta Hamada

Makoto Hattori

Kenji Iida

Hirofumi Taguchi

Daisuke Matsuka

Masato Itou

Toshiaki Hatano

Ryota Aida

Shuichi Higashida

Hiroaki Mitsuzuka

Kozo Takeda

Sadanori Nakazawa

Katsuhiro Ouchi

The present invention provides an intra-hoistway measurement system automatically measuring dimensions within an elevator hoistway prior to elevator installation to reduce labor of workers. An intra-hoistway measurement system according to the present invention includes: a reference laser device that is mounted to a structure on a ceiling or in an upper portion of the hoistway for an elevator and emits a laser beam toward a lowermost part; a mobile measuring device that has a plane measuring device to measure horizontal dimensions within the hoistway; and a moving device that is mounted to the structure on the ceiling or in the upper portion of the hoistway and moves the mobile measuring device up and down. The mobile measuring device has a reference laser detection device that detects the laser beam emitted from the reference laser device, and an attitude detection device that detects its own attitude.

Intra-hoistway measurement system

An overhead line damper capable of suppressing a lift force that an overhead line receives due to wind is provided. A damperfor an overhead line that is provided at an overhead line Lincludes a clamping mechanism (a pair of hinge piecesand) that is fitted to an outer circumferential surface of the overhead line L, and a rotary memberwith a lower part attached to weightsand, and an upper part rotatably attached to the clamping mechanism, and the clamping mechanism has a regulation part (an opening part) that regulates a rotation range of the rotary memberso that the weightsandrotate within an angle range from &#xb1;20 degrees to &#xb1;40 degrees inclusive in a vertical direction.

Overhead wire damper

Growing community of inventors

Tokyo, Japan

Yuta Hamada