Patents by Inventor Yasuaki Matsumoto
Yasuaki Matsumoto 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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Publication number: 20210198070Abstract: A sheet conveyance apparatus includes a first guide, a second guide configured to form a conveyance path together with the first guide, a conveyance portion, a pressing portion configured to press the sheet against the first guide, an urging portion configured to urge the pressing portion in an urging direction toward the first guide, a receiving member configured to hold the pressing portion and receive a reaction force of the urging portion, and a detection unit including a first detection, and a second detection portion, wherein the second guide provided with the second detection portion, and the receiving member are movably disposed with respect to the first guide provided with the first detection portion respectively, and are configured to be positioned with respect to the first guide independently from each other.Type: ApplicationFiled: December 18, 2020Publication date: July 1, 2021Inventor: Yasuaki Matsumoto
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Publication number: 20210152104Abstract: A thyristor starter accelerates a synchronous machine from a stop state to a predetermined rotation speed by sequentially performing a first mode of performing commutation of an inverter by intermittently setting DC output current of a converter to zero and a second mode of performing commutation of the inverter by induced voltage of the synchronous machine. In the thyristor starter, during a first time period from start of performance of the second mode to arrival of the induced voltage of the synchronous machine at a first voltage value, a phase control angle of the inverter is changed such that a value thereof becomes larger as a rotation speed of the synchronous machine becomes higher.Type: ApplicationFiled: June 21, 2017Publication date: May 20, 2021Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Hironori KAWAGUCHI, Akinobu ANDO, Hiroshi OGINO, Yasuaki MATSUMOTO
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Publication number: 20210091693Abstract: A converter controller configured to control a firing phase of a converter includes an integral element integrating a deviation of DC current from a current command value and generates a voltage command value of output voltage of the converter by performing control calculation of the deviation. In a first mode of performing commutation of an inverter by intermittently setting DC current to zero, the converter controller sets DC current to zero for a predetermined pause time by narrowing a phase control angle simultaneously with a commutation command for the inverter. When the control calculation is resumed immediately after the pause time, the converter controller uses a control amount calculated in control calculation immediately before the pause time as a preset value of the integral element immediately after the pause time.Type: ApplicationFiled: February 19, 2018Publication date: March 25, 2021Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Hironori KAWAGUCHI, Hiroshi OGINO, Yasuaki MATSUMOTO, Akinobu ANDO
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Publication number: 20210083602Abstract: A thyristor starter is configured to accelerate a synchronous machine from a stop state to a predetermined rotation speed by sequentially performing a first mode of performing commutation of an inverter by intermittently setting DC output current of a converter to zero and a second mode of performing commutation of the inverter by induced voltage of the synchronous machine. The thyristor starter is further configured to raise induced voltage in proportion to the rotation speed of the synchronous machine by keeping field current constant and to suppress rise of the induced voltage by reducing the field current after the induced voltage reaches a first voltage value, in the first mode.Type: ApplicationFiled: June 21, 2017Publication date: March 18, 2021Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Yasuaki MATSUMOTO, Hiroshi OGINO, Hironori KAWAGUCHI, Akinobu ANDO, Ryoji MIYATAKE, Michio KATAOKA
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Patent number: 10951144Abstract: A thyristor starter is configured to accelerate a synchronous machine from a stop state to a predetermined rotation speed by sequentially performing a first mode of performing commutation of an inverter by intermittently setting DC output current of a converter to zero and a second mode of performing commutation of the inverter by induced voltage of the synchronous machine. In a first case in which a first synchronous machine having a first inductance is started, a switching rotation speed for switching from the first mode to the second mode is set to a higher rotation speed, compared with a second case in which a second synchronous machine having a second inductance larger than the first inductance is started.Type: GrantFiled: June 21, 2017Date of Patent: March 16, 2021Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Yasuaki Matsumoto, Hiroshi Ogino, Hironori Kawaguchi, Akinobu Ando
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Publication number: 20210061597Abstract: A sheet feeding apparatus includes a sheet supporting portion configured to support a sheet, a feeding member configured to contact an upper surface of the sheet supported on the sheet supporting portion and feed the sheet, a drive motor configured to rotate in a first direction and in a second direction opposite to the first direction, and a lifting mechanism connected to the drive motor and configured to lift the sheet supporting portion and lower the feeding member in a case where the drive motor rotates in the first direction, and to lower the sheet supporting portion and lift the feeding member in a case where the drive motor rotates in the second direction.Type: ApplicationFiled: July 23, 2020Publication date: March 4, 2021Inventor: Yasuaki Matsumoto
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Publication number: 20200177111Abstract: A thyristor starter accelerates a synchronous machine from a stop state to a predetermined rotation speed by sequentially performing a first mode of performing commutation of an inverter by intermittently setting DC output current to zero and a second mode of performing commutation of the inverter by induced voltage of the synchronous machine. A second controller controls the firing phase of a thyristor in a converter such that DC output current of the converter matches a current command value, based on a detection signal of a position detector. In the first mode, the current command value is set such that the current value is higher as the rotation speed of the synchronous machine is higher.Type: ApplicationFiled: June 21, 2017Publication date: June 4, 2020Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Yasuaki MATSUMOTO, Hiroshi OGINO, Hironori KAWAGUCHI, Akinobu ANDO
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Publication number: 20200076339Abstract: A thyristor starter is configured to accelerate a synchronous machine from a stop state to a predetermined rotation speed by sequentially performing a first mode of performing commutation of an inverter by intermittently setting DC output current of a converter to zero and a second mode of performing commutation of the inverter by induced voltage of the synchronous machine. In a first case in which a first synchronous machine having a first inductance is started, a switching rotation speed for switching from the first mode to the second mode is set to a higher rotation speed, compared with a second case in which a second synchronous machine having a second inductance larger than the first inductance is started.Type: ApplicationFiled: June 21, 2017Publication date: March 5, 2020Inventors: Yasuaki MATSUMOTO, Hiroshi OGINO, Hironori KAWAGUCHI, Akinobu ANDO
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Publication number: 20190367301Abstract: A sheet conveyance apparatus includes a storage unit storing a sheet, a conveyance member to convey a sheet, a support shaft portion, and a separation unit. The support shaft portion has one end fixed to a main body of the sheet conveyance apparatus and the other end as a free end that is not fixed to the main body. The separation unit pinches and conveys a sheet with the conveyance member and separates a plurality of sheets stored in and fed from the storage unit one by one. The separation unit includes a separation member that is supported by the support shaft portion and rotatable with the support shaft portion, and a holding member to hold the separation member. By moving the holding member in an axial direction of the support shaft portion, the separation unit is removed from the apparatus with the holding member holding the separation member.Type: ApplicationFiled: August 15, 2019Publication date: December 5, 2019Inventors: Kazuhiko Aono, Yasuaki Matsumoto
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Patent number: 10435258Abstract: A sheet conveyance apparatus includes a storage unit storing a sheet, a conveyance member to convey a sheet, a support shaft portion, and a separation unit. The support shaft portion has one end fixed to a main body of the sheet conveyance apparatus and the other end as a free end that is not fixed to the main body. The separation unit pinches and conveys a sheet with the conveyance member and separates a plurality of sheets stored in and fed from the storage unit one by one. The separation unit includes a separation member that is supported by the support shaft portion and rotatable with the support shaft portion, and a holding member to hold the separation member. By moving the holding member in an axial direction of the support shaft portion, the separation unit is removed from the apparatus with the holding member holding the separation member.Type: GrantFiled: October 27, 2017Date of Patent: October 8, 2019Assignee: Canon Kabushiki KaishaInventors: Kazuhiko Aono, Yasuaki Matsumoto
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Publication number: 20190106286Abstract: A sheet supporting apparatus includes first and second units. The first unit includes a first housing, first and second lock portions, a first shaft configured to be supported rotatably with respect to the first housing and to turnably support the first lock portion, and a second shaft configured to be supported rotatably with respect to the first housing and to turnably support the second lock portion. The second unit includes a second housing and first and second engagement portions provided in the second housing and configured to engage respectively with the first and second lock portions. The first and second shafts are disposed such that extension lines of rotational axes of the first and second shafts cross with each other in a plan view.Type: ApplicationFiled: December 4, 2018Publication date: April 11, 2019Inventor: Yasuaki Matsumoto
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Patent number: 10254698Abstract: A sheet feeding device includes: a main assembly; a holding unit detachably mountable to the main assembly; a portion-to-be-engaged provided on the main assembly; a rotatable member, provided in the holding unit, for feeding a sheet; and a guiding member for guiding feeding of the sheet. The guiding member is provided in the holding unit and includes an engaging portion engageable with the portion-to-be-engaged. The guiding member is movable between an engaging position where the portion-to-be-engaged and the engaging portion are engaged with each other to guide the sheet and a guiding position where the portion-to-be-engaged and the engaging portion are disengaged from each other to guide demounting and mounting of the holding unit.Type: GrantFiled: December 5, 2017Date of Patent: April 9, 2019Assignee: Canon Kabushiki KaishaInventor: Yasuaki Matsumoto
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Publication number: 20190098707Abstract: A heating apparatus (2) includes a high frequency power supply (3), a left conductive plate (4), a right conductive plate (5), a left heating coil (11), and a right heating coil (12). The left heating coil (11) includes a left conductor portion (21). The left conductor portion (21) faces a gear tooth (7a) of a helical gear (7) and extends in a direction orthogonal to the direction in which the gear tooth (7a) extends. The left heating coil (11) includes a focusing magnetic body (31) which focuses magnetic flux in the left conductor portion (21) and concentrates the magnetic flux on a surface of the gear tooth (7a). The left heating coil (11) includes an upper inducing magnetic body (32) which induces a part of the magnetic flux flowing in a tooth root of the gear tooth (7a) into a tooth tip of the gear tooth (7a).Type: ApplicationFiled: September 13, 2018Publication date: March 28, 2019Inventors: Masayuki Orihara, Hiroaki Mase, Yasuaki Matsumoto, Junko Tanaka, Ryosuke Fukuchi, Hiroko Watanabe, Yasufumi Nakai, Akihiro Hanaki
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Patent number: 10173856Abstract: A sheet supporting apparatus includes first and second units. The first unit includes a first housing, first and second lock portions, a first shaft configured to be supported rotatably with respect to the first housing and to turnably support the first lock portion, and a second shaft configured to be supported rotatably with respect to the first housing and to turnably support the second lock portion. The second unit includes a second housing and first and second engagement portions provided in the second housing and configured to engage respectively with the first and second lock portions. The first and second shafts are disposed such that extension lines of rotational axes of the first and second shafts cross with each other in a plan view.Type: GrantFiled: October 6, 2017Date of Patent: January 8, 2019Assignee: CANON KABUSHIKI KAISHAInventor: Yasuaki Matsumoto
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Patent number: 9991883Abstract: A thyristor switch is constituted of a pair of arms connected in anti-parallel, each of the arms including a plurality of thyristors connected in series. A controller includes a phase detecting unit configured to detect a phase of a power supply voltage supplied from an alternating-current power supply, and a gate signal generating unit configured to interrupt a gate signal when an open command is provided to the static switch and the phase of the power supply voltage detected by the phase detecting unit matches a target phase. The target phase is set outside of a phase range where interruption of the gate signal is prohibited, the phase range being set so as to include a zero crossing point at which a load current is switched in polarity.Type: GrantFiled: January 7, 2015Date of Patent: June 5, 2018Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Yasuaki Matsumoto, Akinobu Ando, Yasuhiko Hosokawa
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Publication number: 20180120726Abstract: A sheet conveyance apparatus includes a storage unit storing a sheet, a conveyance member to convey a sheet, a support shaft portion, and a separation unit. The support shaft portion has one end fixed to a main body of the sheet conveyance apparatus and the other end as a free end that is not fixed to the main body. The separation unit pinches and conveys a sheet with the conveyance member and separates a plurality of sheets stored in and fed from the storage unit one by one. The separation unit includes a separation member that is supported by the support shaft portion and rotatable with the support shaft portion, and a holding member to hold the separation member. By moving the holding member in an axial direction of the support shaft portion, the separation unit is removed from the apparatus with the holding member holding the separation member.Type: ApplicationFiled: October 27, 2017Publication date: May 3, 2018Inventors: Kazuhiko Aono, Yasuaki Matsumoto
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Publication number: 20180111784Abstract: A sheet supporting apparatus includes first and second units. The first unit includes a first housing, first and second lock portions, a first shaft configured to be supported rotatably with respect to the first housing and to turnably support the first lock portion, and a second shaft configured to be supported rotatably with respect to the first housing and to turnably support the second lock portion. The second unit includes a second housing and first and second engagement portions provided in the second housing and configured to engage respectively with the first and second lock portions. The first and second shafts are disposed such that extension lines of rotational axes of the first and second shafts cross with each other in a plan view.Type: ApplicationFiled: October 6, 2017Publication date: April 26, 2018Inventor: Yasuaki Matsumoto
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Publication number: 20180095399Abstract: A sheet feeding device includes: a main assembly; a holding unit detachably mountable to the main assembly; a portion-to-be-engaged provided on the main assembly; a rotatable member, provided in the holding unit, for feeding a sheet; and a guiding member for guiding feeding of the sheet. The guiding member is provided in the holding unit and includes an engaging portion engageable with the portion-to-be-engaged. The guiding member is movable between an engaging position where the portion-to-be-engaged and the engaging portion are engaged with each other to guide the sheet and a guiding position where the portion-to-be-engaged and the engaging portion are disengaged from each other to guide demounting and mounting of the holding unit.Type: ApplicationFiled: December 5, 2017Publication date: April 5, 2018Inventor: Yasuaki Matsumoto
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Patent number: 9880505Abstract: A sheet feeding device includes: a main assembly; a holding unit detachably mountable to the main assembly; a portion-to-be-engaged provided on the main assembly; a rotatable member, provided in the holding unit, for feeding a sheet; and a guiding member for guiding feeding of the sheet. The guiding member is provided in the holding unit and includes an engaging portion engageable with the portion-to-be-engaged. The guiding member is movable between an engaging position where the portion-to-be-engaged and the engaging portion are engaged with each other to guide the sheet and a guiding position where the portion-to-be-engaged and the engaging portion are disengaged from each other to guide demounting and mounting of the holding unit.Type: GrantFiled: July 18, 2016Date of Patent: January 30, 2018Assignee: Canon Kabushiki KaishaInventor: Yasuaki Matsumoto
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Publication number: 20170353179Abstract: A thyristor switch is constituted of a pair of arms connected in anti-parallel, each of the anus including a plurality of thyristors connected in series. A controller includes a phase detecting unit configured to detect a phase of a power supply voltage supplied from an alternating-current power supply, and a gate signal generating unit configured to interrupt a gate signal when an open command is provided to the static switch and the phase of the power supply voltage detected by the phase detecting unit matches a target phase. The target phase is set outside of a phase range where interruption of the gate signal is prohibited, the phase range being set so as to include a zero crossing point at which a load current is switched in polarity.Type: ApplicationFiled: January 7, 2015Publication date: December 7, 2017Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Yasuaki MATSUMOTO, Akinobu ANDO, Yasuhiko HOSOKAWA