Patents by Inventor Takashi Yumura
Takashi Yumura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7992687Abstract: A door device for an elevator is provided with an elevator door for opening/closing a doorway through which an interior of a car communicates with a landing, a distance sensor for continuously detecting a distance from the doorway to a passenger at the landing, a processing device for obtaining a door control command corresponding to information from the distance sensor, and a door control device for controlling a movement of the elevator door based on the door control command from the processing device. Thus, the elevator door can be moved in accordance with the movement of the passenger. Accordingly, the passenger is allowed to board the car more reliably, and a running efficiency of the elevator can be enhanced.Type: GrantFiled: March 20, 2006Date of Patent: August 9, 2011Assignee: Mitsubishi Electric CorporationInventors: Takashi Yumura, Takaharu Ueda
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Patent number: 7950499Abstract: A control apparatus for an elevator has a support device mounted on a car, a detection device for detecting the position of the car, and a control unit for controlling operation of the elevator based on information from the detection device. The support device has a rail holding member, which is displaceable with respect to the car and is guided by a guide rail located in a hoistway in which the car moves. The detection device is located on the rail holding member.Type: GrantFiled: November 29, 2005Date of Patent: May 31, 2011Assignee: Mitsubishi Electric CorporationInventors: Ken-ichi Okamoto, Takashi Yumura
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Patent number: 7918320Abstract: An emergency stop system for an elevator includes a state sensor for detecting an operation of a car, a brake device for braking the car, a brake controller for outputting a signal for operating the brake device based on a signal detected by the state sensor, and an uninterruptible power supply device for supplying electric power to the sensor, the brake device, and the controller. The controller has a signal processing/calculating unit for calculating the deceleration of the car based on the signal detected by the sensor, a command value calculating unit for calculating a command value for operating the brake device based on the deceleration of the car calculated by the processing/calculating unit, and a power monitoring device for monitoring state of the uninterruptible power supply device. At least one of the sensor, the processing/calculating unit, and the calculating unit includes independent systems.Type: GrantFiled: November 25, 2005Date of Patent: April 5, 2011Assignee: Mitsubishi Electric CorporationInventors: Rikio Kondo, Takaharu Ueda, Hiroshi Kigawa, Ken-Ichi Okamoto, Takashi Yumura
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Patent number: 7823705Abstract: An elevator apparatus is equipped with an elevator component that is operated during operation of an elevator, a detector for measuring a change in a physical quantity other than temperature as to the elevator component, and a control device for controlling the operation of the elevator based on information from the detector. The elevator component is, for example, a hoisting machine for moving a car of the elevator. The hoisting machine has a motor, and a driving sheave that is rotated by the motor. The detector measures a strain of a frame of the motor as the physical quantity other than temperature. The control device determines based on the strain of the frame of the motor whether or not there is an abnormality in the operation of the elevator, and controls the operation of the elevator. It is therefore possible to determine easily and more reliably whether or not there is an abnormality in the operation of the elevator, without the need to directly measure the temperature of the motor (6).Type: GrantFiled: September 30, 2005Date of Patent: November 2, 2010Assignee: Mitsubishi Electric CorporationInventors: Takaharu Ueda, Masaya Sakai, Takashi Yumura
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Patent number: 7784590Abstract: In a control operation performed at time of an earthquake or strong wind, when a running elevator is stopped at a nearest floor, the natural frequency of the transverse vibration of a rope is prevented from resonating with the natural frequency of the building, and thereby an increase in transverse vibration of the rope is restrained. In the control operation, when a shake of the building caused by earthquake or strong wind is detected, a running elevator is stopped at the nearest floor, or an elevator passing through an express zone is stopped emergently and runs at a low speed to the nearest floor, the natural frequency of the transverse vibration of the rope is compared with the natural frequency of the building, and the car stop position is selected at a non-resonance position to prevent the natural frequency of the transverse vibration of the rope from resonating with the natural frequency of the building.Type: GrantFiled: March 1, 2006Date of Patent: August 31, 2010Assignees: Mitsubishi Denki Kabushiki Kaisha, Mitsubishi Electric Building Techno-Service Co., Ltd.Inventors: Seiji Watanabe, Daiki Fukui, Takashi Yumura, Hideki Nishiyama, Hideki Shiozaki
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Patent number: 7775326Abstract: In an elevator apparatus, first and second raised/lowered bodies are raised and lowered by hoisting machines. The second raised/lowered body has a raised/lowered main body and a rocking member rockably connected to the raised/lowered main body. The raised/lowered main body is suspended by a main rope via the rocking member. The main rope has a first rope end connected to the rocking member on one side of a rocking center of the rocking member and a second rope end connected to the rocking member on another side of the rocking center.Type: GrantFiled: February 23, 2006Date of Patent: August 17, 2010Assignee: Mitsubishi Electric CorporationInventors: Takashi Yumura, Takaharu Ueda
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Patent number: 7703578Abstract: An elevator apparatus has a car suspended by a main rope through the intermediation of a shackle spring. The car is equipped with a displacement sensor for measuring the displacement amount of the main rope with respect to the car. The displacement sensor is electrically connected to an abnormality control device mounted on the car. The abnormality control device obtains the magnitude of the tension of the main rope based on information from the displacement sensor, and selectively outputs a braking command signal to one of the following devices: an operation control device, a brake device, and an emergency stop device, according to the magnitude of the tension of the main rope.Type: GrantFiled: April 28, 2004Date of Patent: April 27, 2010Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Takuo Kugiya, Ken-Ichi Okamoto, Takashi Yumura, Tatsuo Matsuoka
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Publication number: 20100018810Abstract: In an elevator apparatus, a car and a counterweight are raised/lowered by hoisting machines. Each of those hoisting machines includes a drive sheave and a hoisting machine body, the hoisting machine body including an electric motor for rotating the drive sheave and a hoisting machine brake for braking rotation of the drive sheave. At least one of the car and the counterweight includes a raised/lowered body-mounted brake device for stopping the car as an emergency measure on a condition different from a condition set for a safety gear.Type: ApplicationFiled: February 17, 2006Publication date: January 28, 2010Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Takashi Yumura, Takaharu Ueda
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Publication number: 20090266649Abstract: An emergency stop system for an elevator includes a state sensor for detecting an operation of a car, a brake device for braking the car, a brake controller for outputting a signal for operating the brake device based on a signal detected by the state sensor, and an uninterruptible power supply device for supplying electric power to the sensor, the brake device, and the controller. The controller has a signal processing/calculating unit for calculating the deceleration of the car based on the signal detected by the sensor, a command value calculating unit for calculating a command value for operating the brake device based on the deceleration of the car calculated by the processing/calculating unit, and a power monitoring device for monitoring state of the uninterruptible power supply device. At least one of the sensor, the processing/calculating unit, and the calculating unit includes independent systems.Type: ApplicationFiled: November 25, 2005Publication date: October 29, 2009Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Rikio Kondo, Takaharu Ueda, Hiroshi Kigawa, Ken-Ichi Okamoto, Takashi Yumura
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Publication number: 20090236185Abstract: A door device for an elevator is provided with an elevator door for opening/closing a doorway through which an interior of a car communicates with a landing, a distance sensor for continuously detecting a distance from the doorway to a passenger at the landing, a processing device for obtaining a door control command corresponding to information from the distance sensor, and a door control device for controlling a movement of the elevator door based on the door control command from the processing device. Thus, the elevator door can be moved in accordance with the movement of the passenger. Accordingly, the passenger is allowed to board the car more reliably, and a running efficiency of the elevator can be enhanced.Type: ApplicationFiled: March 20, 2006Publication date: September 24, 2009Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Takashi Yumura, Takaharu Ueda
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Publication number: 20090236184Abstract: An elevator apparatus is equipped with an elevator component that is operated during operation of an elevator, a detector for measuring a change in a physical quantity other than temperature as to the elevator component, and a control device for controlling the operation of the elevator based on information from the detector. The elevator component is, for example, a hoisting machine for moving a car of the elevator. The hoisting machine has a motor, and a driving sheave that is rotated by the motor. The detector measures a strain of a frame of the motor as the physical quantity other than temperature. The control device determines based on the strain of the frame of the motor whether or not there is an abnormality in the operation of the elevator, and controls the operation of the elevator. It is therefore possible to determine easily and more reliably whether or not there is an abnormality in the operation of the elevator, without the need to directly measure the temperature of the motor (6).Type: ApplicationFiled: September 30, 2005Publication date: September 24, 2009Applicant: Mitsubishi Electric CorporationInventors: Takaharu Ueda, Masaya Sakai, Takashi Yumura
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Patent number: 7540358Abstract: In an elevator apparatus, a control device obtains car information including at least one of car position information and car speed information based on a main detection signal from a main sensor unit. An auxiliary sensor unit detects arrival of a car at a preset reference position with in a hoistway to generate an auxiliary detection signal. The control device makes corrections to the car information based on the auxiliary detection signal.Type: GrantFiled: May 31, 2004Date of Patent: June 2, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kenichi Okamoto, Hiroshi Kigawa, Takashi Yumura, Tatsuo Matsuoka
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Publication number: 20090120729Abstract: A control apparatus for an elevator has a support device mounted on a car, a detection device for detecting the position of the car, and a control unit for controlling operation of the elevator based on information from the detection device. The support device has a rail holding member, which is displaceable with respect to the car and is guided by a guide rail located in a hoistway in which the car moves. The detection device is located on the rail holding member.Type: ApplicationFiled: November 29, 2005Publication date: May 14, 2009Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Ken-Ichi Okamoto, Takashi Yumura
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Publication number: 20090114484Abstract: In a control operation performed at the time of earthquake or strong wind, when a running elevator is stopped at the nearest floor, the natural frequency of the transverse vibration of a rope is prevented from resonating with the natural frequency of the building, and thereby the increase in transverse vibration of the rope is restrained. There is provided a rope resonance checking means in which, in the control operation in which when a shake of the building caused by earthquake or strong wind is detected, a running elevator is stopped at the nearest floor, or an elevator passing through an express zone is stopped emergently and runs at a low speed to the nearest floor, the natural frequency of the transverse vibration of the rope is compared with the natural frequency of the building, and selects the car stop position at a non-resonance position so as to prevent the natural frequency of the transverse vibration of the rope from resonating with the natural frequency of the building.Type: ApplicationFiled: March 1, 2006Publication date: May 7, 2009Applicants: MITSUBISHI DENKI KABUSHIKI KAISHA, MITSUBISHI ELEC. BLDG. TECHNO-SERV. CO., LTD.Inventors: Seiji Watanabe, Daiki Fukui, Takashi Yumura, Hideki Nishiyama, Hideki Shiozaki
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Publication number: 20080142313Abstract: In an elevator apparatus, first and second raised/lowered bodies are raised and lowered by hoisting machines. The second raised/lowered body has a raised/lowered main body and a rocking member rockably connected to the raised/lowered main body. The raised/lowered main body is suspended by a main rope via the rocking member. The main rope has a first rope end connected to the rocking member on one side of a rocking center of the rocking member and a second rope end connected to the rocking member on another side of the rocking center.Type: ApplicationFiled: February 23, 2006Publication date: June 19, 2008Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Takashi Yumura, Takaharu Ueda
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Patent number: 7287626Abstract: In a buffer device for an elevator, a hydraulic buffer that alleviates shock generated when a traveling body impacts at the bottom of a hoistway is located at the bottom of the hostway. Provided between the traveling body and the bottom of the hoistway is an elastic member that is elastically deformed and that alleviates the shock generated by the impact of the traveling body with the hydraulic buffer. The elastic member is arranged so that, when elastically deformed, almost fall of the elastic member is positioned within a range of a vertical dimension of the hydraulic buffer.Type: GrantFiled: June 13, 2006Date of Patent: October 30, 2007Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hiroshi Kigawa, Takashi Yumura, Sen Zhao, Chang-Ming Zhu
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Publication number: 20070170009Abstract: An elevator apparatus has a car suspended by a main rope through the intermediation of a shackle spring. The car is equipped with a displacement sensor for measuring the displacement amount of the main rope with respect to the car. The displacement sensor is electrically connected to an abnormality control device mounted on the car. The abnormality control device obtains the magnitude of the tension of the main rope based on information from the displacement sensor, and selectively outputs a braking command signal to one of the following devices: an operation control device, a brake device, and an emergency stop device, according to the magnitude of the tension of the main rope.Type: ApplicationFiled: April 28, 2004Publication date: July 26, 2007Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Takuo Kugiya, Ken-Ichi Okamoto, Takashi Yumura, Tatsuo Matsuoka
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Publication number: 20070170005Abstract: A machine room-less elevator, in which a car (2) raising and lowering along guide rails (4) and a counterweight (3) raising and lowering in the opposite direction of the car along a right or left side-surface or a rear surface of the car are driven by a hoist (11) provided at the top of a hoistway, includes first and second hoist ropes (7a), (7b) of two systems having one ends fixed to right and left sides of the car at positions nearly symmetrical with respect to a center of gravity of the car in a horizontal plane of the car and the other ends fixed to the counterweight, and one of the first and second hoist ropes is driven by the hoist.Type: ApplicationFiled: February 17, 2005Publication date: July 26, 2007Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Hiroshi Kigawa, Takashi Yumura, Kenichi Okamoto, Hideaki Kodera
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Patent number: 7228943Abstract: An elevator apparatus has a criterion (overspeed levels) that changes in accordance with an operational condition of a car. The elevator apparatus also has a position information correcting means that corrects an error in value that determines the criterion. In the elevator apparatus, the overspeed levels are determined using continuous information corresponding to car position, while the continuous information is corrected using intermittent information corresponding to actual car position. According to the elevator apparatus, on-the-spot adjustment or long-time maintenance becomes unnecessary, and overspeed detection levels can easily be changed in accordance with the operation conditions of the car.Type: GrantFiled: September 26, 2002Date of Patent: June 12, 2007Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Takuo Kugiya, Kenichi Okamoto, Takashi Yumura, Mineo Okada
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Publication number: 20060289241Abstract: In an elevator apparatus, a control device obtains car information including at least one of car position information and car speed information based on a main detection signal from a main sensor unit. An auxiliary sensor unit detects arrival of a car at a preset reference position with in a hoistway to generate an auxiliary detection signal. The control device makes corrections to the car information based on the auxiliary detection signal.Type: ApplicationFiled: May 31, 2004Publication date: December 28, 2006Inventors: Kenichi Okamoto, Hiroshi Kigawa, Takashi Yumura, Tatsuo Matsuoka