公开(公告)号：US20230391943A1

公开(公告)日：2023-12-07

申请号：US18033094

申请日：2021-08-25

Applicant: HITACHI, LTD.

Inventor： Takeshi KONDO ,  Takahito MURAKI

IPC: C08G59/68 ,  C08G59/24 ,  C08G59/42 ,  C08G59/50 ,  C08L63/04 ,  C08J5/04

CPC classification number: C08G59/685 ,  C08G59/245 ,  C08G59/42 ,  C08G59/5073 ,  C08L63/04 ,  C08J5/042 ,  C08J5/043 ,  C08J5/046

Abstract: Provided are a resin composition, a resin cured product, and a fiber reinforced resin capable of shortening a stress relaxation time. In order to solve this problem, the resin composition contains an epoxy compound having two or more epoxy groups in a molecule, an acid anhydride, and a complex in which an organic ligand is coordinated to manganese (III). The resin cured product contains a resin having an ester group and a hydroxy group, and a complex in which an organic ligand is coordinated to manganese (III). A fiber reinforced resin 101 contains a resin 1 having an ester group and a hydroxy group, fibers 2 impregnated with at least the resin, and a complex 3 in which an organic ligand is coordinated to manganese (III).

公开(公告)号：US20180354843A1

公开(公告)日：2018-12-13

申请号：US16068759

申请日：2017-01-11

Applicant: HITACHI, LTD.

Inventor： Takashi NAITO ,  Takuya AOYAGI ,  Tatsuya MIYAKE ,  Takeshi KONDO ,  Hiroki KANEKO ,  Kazutaka OKAMOTO

IPC: C03C8/24 ,  C03C3/12 ,  C03C3/21 ,  C03C14/00 ,  C03C8/16 ,  C03C8/18 ,  C03C27/06 ,  C03C17/04 ,  C03C17/00

CPC classification number: C03C8/24 ,  C03C3/12 ,  C03C3/122 ,  C03C3/125 ,  C03C3/21 ,  C03C8/02 ,  C03C8/16 ,  C03C8/18 ,  C03C8/20 ,  C03C14/004 ,  C03C17/007 ,  C03C17/04 ,  C03C27/06 ,  C03C2205/00 ,  C03C2218/11 ,  H01J9/02 ,  H01J9/24 ,  H01J11/22 ,  H01J11/48 ,  H01L23/02 ,  H01L23/10 ,  H01L31/0224 ,  H01L31/022425 ,  H01L51/50 ,  H01L51/5246 ,  H01L2224/16225 ,  H01L2924/16152 ,  H03H9/10 ,  H05B33/04 ,  H05B33/26

Abstract: The purpose of the present invention is to provide a lead-free glass composition in which crystallization is suppressed and which has a low softening point. This lead-free glass composition is characterized by containing silver oxide, tellurium oxide and vanadium oxide, and further containing at least one compound selected from among yttrium oxide, lanthanum oxide, cerium oxide, erbium oxide, ytterbium oxide, aluminum oxide, gallium oxide, indium oxide, iron oxide, tungsten oxide and molybdenum oxide as an additional component, and in that the content values (mol %) of silver oxide, tellurium oxide and vanadium oxide satisfy the relationships Ag2O>TeO2≥V2O5 and Ag5O≤2V2O5 when calculated in terms of the oxides, and in that the content of TeO2 is 25-37 mol. %.

公开(公告)号：US20220024720A1

公开(公告)日：2022-01-27

申请号：US17294855

申请日：2019-10-17

Applicant: Hitachi, Ltd.

Inventor： Takeshi KONDO ,  Shinsuke INOUE ,  Naoto OHNUMA ,  Yasutaka SUZUKI ,  Kohichiroh IDE

IPC: B66B5/16 ,  H02J9/06 ,  H02J7/00 ,  B66B5/06 ,  B66B1/32

Abstract: An elevator according to an aspect of the present invention includes a car speed detection device that measures car speed, an emergency braking device that comes into press contact with a guiderail and emergently stops a car when the car speed exceeds a threshold, an electric actuating unit that electrically actuates the emergency braking device, a battery that supplies electric power when commercial power supply is interrupted, and a safety control unit that monitors abnormality of the elevator and controls operation of the electric actuating unit. The safety control unit measures remaining power of the battery when the electric power is supplied from the battery, determines operation propriety of the emergency braking device at commercial power supply restoration time based on transition of battery remaining power, and controls operation of the electric actuating unit at the commercial power supply restoration time based on content of the determination.

公开(公告)号：US20220002114A1

公开(公告)日：2022-01-06

申请号：US17283339

申请日：2019-09-24

Applicant: Hitachi, Ltd.

Inventor： Takeshi KONDO ,  Shinsuke INOUE ,  Naoaki NOGUCHI

IPC: B66B5/06

Abstract: A control system for an elevator includes a first car speed detection device and a second car speed detection device to measure a moving speed of the car, a hoist brake to apply braking to the hoist, emergency stop equipment to brake the car by grasping guide rails, and a control device to control the hoist, the hoist brake, and the emergency stop equipment based on outputs of the first car speed detection device and the second car speed detection device. If two pieces of velocity data that have been output from the first car speed detection device and the second car speed detection device respectively differ from one another and acceleration data of the car calculated from one that is higher of the two pieces of velocity data is equal to or more than a predetermined threshold, the control device decides if either car speed detection device is abnormal.

公开(公告)号：US20190202959A1

公开(公告)日：2019-07-04

申请号：US16322833

申请日：2017-07-07

Applicant: HITACHI, LTD.

Inventor： Yuri KAJIHARA ,  Takahito MURAKI ,  Yasuhiko TADA ,  Jun NUNOSHIGE ,  Takeshi KONDO

IPC: C08F293/00 ,  C08J7/16

CPC classification number: C08F293/005 ,  C08F4/52 ,  C08F220/28 ,  C08F220/30 ,  C08F2438/00 ,  C08J7/16 ,  C08J2353/00 ,  C08K5/098 ,  C08L57/00 ,  H01B3/44 ,  H01B3/442 ,  H01B3/447 ,  H01F27/324 ,  H02K3/30

Abstract: In a conventional self-healing material, although the resin properties after self-healing are restored to the same level as the initial refractoriness and strength of the resin, no further extension of life can be expected. A resin cured product according to the present invention includes: a first vinyl monomer having an ester bond; a second vinyl monomer having a hydroxyl group; a transesterification reaction catalyst; and a boron compound.

公开(公告)号：US20180215129A1

公开(公告)日：2018-08-02

申请号：US15748533

申请日：2015-07-31

Applicant: HITACHI, LTD.

Inventor： Yasuhiko TADA ,  Takahito MURAKI ,  Yuri KAJIHARA ,  Takeshi KONDO ,  Tadashi ARAI

IPC: B32B27/08 ,  H01B3/40 ,  H02K3/30

CPC classification number: B32B27/08 ,  H01B3/40 ,  H02K3/30

Abstract: A functionally graded material according to the present invention adopts, for example, the following configuration. A functionally graded material is constituted by laminating a plurality of resin compositions. Among the plurality of resin compositions, a first resin composition has a different property from a second resin composition adjacent to the first resin composition. An interface between the first resin composition and the second resin composition is joined by a dynamic covalent bond.