Kajima Corporation

Hitachi Metals, Ltd.

Yukihiro Omika

Takao Inoue

Kuniaki Sato

Takuji Kobori

Toshikazu Yamada

Hideshige Matsuo

Akio Tomita

Michio Itoh

Masayuki Nagata

Yoshihiro Nakamura

Eiji Matsushita

Toshio Saeki

Kazuo Kojima

Jun Okawa

Tsutomu Kumazawa

Shue Suzuki

Yasuo Ogawa

Yukimasa Yamamoto

Isamu Yamamato

Mitsunobu Iwata

Kouichi Suguki

In a multi-storied frame building, a controlled frame member having means to damp seismic forces of deformation. A first vertical wall column has a top connected to a horizontal wall girder overhanging the wall column. A second wall column is erected in vertical alignment beneath the tip end of the wall girder co-planar with, but spaced from, the first wall column. A seismic response control apparatus connected between the tip end of the wall girder and the top of the second wall column generates damping force when the tip end of the wall girder and the top of the second wall column are displaced relative to each other. Additional girders are arranged on lower stories of the building as required to further strengthen the building against seismic deformation.

Seismic response controlled frame of bending deformation control type

By rotating mixing blade units having blades inclined in opposite directions, pulverulent materials such as cement can be effectively mixed with a liquid under the most suitable condition to produce a desirable mixture. The blades of the mixing blade units are in spaced opposed relation to each other and formed so as to have their front edges spaced at a larger distance than their rear edges relative to the direction of rotation, thereby to cause the parts of the mixture around the respective mixing blade units to come into collision with each other between the mixing blade units. A mixture of high quality in which the pulverulent materials are uniformly dispersed without being left in the form of immiscible lumps with the liquid can be obtained.

Mixing device

Spiral-shaped screw blades disposed one on another on the bottom of a mixing container are rotated at a high speed for agitating pulverulent materials including aggregate and water to form a mixture. A rapid current of the mixture of the pulverulent materials and water is brought about by the rotating screw blades and causes the aggregate in the mixture to serve as a mixing agitator like milling balls used in a ball mill, to thereby effectively break up lumps of the pulverulent material which are immiscible with water and which are inevitably formed by initially mixing the pulverulent material with water.

A structure having a movable dome-type roof including a plurality of independently movable shell sections which nest one beneath the other. A frame superstructure is arched over the dome to support the upper ends of the shell sections. The lower edges of the shell sections are mounted on self-powered carriages and are independently shiftable about a circular base of the structure. By selectively shifting individual shell sections, the dome may be contracted or expanded as desired. The superstructure may be mounted on a circular track or on a pair of linear tracks to expedite the opening and closing of the dome.

Movable dome-type roof for structure

A column/beam joint structure, made of steel members, in which a reinforcing member formed into a flat plate or into a strip shape so as to surround the outer periphery of the flange is interposed between a flange having a vertical plane constituting the column and a base plate constituting a connector fixedly fitted to an end of a beam. The flange, the reinforcing member and the connector are integrally joined together via a connecting fastener member.

Column/beam joint structure

Growing community of inventors

Tokyo, Japan

Yukihiro Omika