Patents by Inventor Hiroshi Okamura
Hiroshi Okamura 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: 10185274Abstract: A motor connection detecting device includes: a bipolar stepping motor; a motor driver adapted to control current to be supplied to the bipolar stepping motor; and a controller connected to the bipolar stepping motor and the motor driver. The controller detects voltage of regenerative current generated during motor ON time in which current flows in the bipolar stepping motor, and determines abnormal connection of the bipolar stepping motor. The detected voltage is voltage generated during a fast decay period according to a current attenuation method of the regenerative current.Type: GrantFiled: February 9, 2017Date of Patent: January 22, 2019Assignee: Ricoh Company Ltd.Inventors: Hiroshi Okamura, Tomohide Kondoh, Hayato Fujita
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Publication number: 20180348664Abstract: A remaining powder amount detection device includes: a powder moving portion configured to change a distribution of powder in an inner space of a powder container containing the powder; a drive unit configured to drive the powder moving portion; a change value detector configured to detect a change value indicating a positional change of the powder container; and a remaining powder amount detector configured to detect a remaining amount of the powder contained in the powder container, based on the change value. The drive unit is configured to drive the powder moving portion so as to move the powder to near the change value detector. The remaining powder amount detector is configured to detect the remaining amount based on the change value in a state where the powder is moved to near the change value detector.Type: ApplicationFiled: May 24, 2018Publication date: December 6, 2018Inventors: Hiroshi OKAMURA, Masaki TSUGAWA, Yuji IKEDA, Natsuko ISHIZUKA, Hayato FUJITA, Yohei KUSHIDA, Keita MAEJIMA
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Publication number: 20180321074Abstract: A water content measuring device measures water content of an object to be measured. The water content measuring device includes two plate members that are disposed facing each other, a current generating unit, a measuring unit, and an arithmetic processing unit. The current generating unit generates current supplied between the two plate members. The measuring unit measures electrostatic capacitance generated by the current supplied between the two plate members. The arithmetic processing unit is configured to convert the electrostatic capacitance measured by the measuring unit to water content. Two plate members each have a shape or are disposed such that at least two points on a leading edge of the object enter between the two plate members at different timings in a direction perpendicular to a passing direction in which the object passes through the two plate members.Type: ApplicationFiled: April 27, 2018Publication date: November 8, 2018Inventors: Yohei KUSHIDA, Keita Maejima, Hiroshi Okamura, Natsuko Ishizuka, Hayato Fujita, Masaki Tsugawa, Yuji Ikeda
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Publication number: 20180239285Abstract: A thickness detector includes a rotator having different shape marks, disposed at different positions in a rotation direction; an opposing member disposed opposite the rotator; a detector to detect and output a displacement amount of the rotator or the opposing member in a sheet thickness direction; and a controller. The controller is configured to acquire first output values for one rotation from the detector, in a state without sheet; determine, based on a value output from the detector, whether one of the plurality of marks is detected in a state with the sheet held; acquire a predetermined number of second output values after one of the marks is detected; extract, from the first output values, values corresponding to the second output values, based on the value corresponding to the detected mark; and calculate a sheet thickness based on the second output values and the extracted first output values.Type: ApplicationFiled: December 26, 2017Publication date: August 23, 2018Applicant: Ricoh Company, LtdInventors: Hayato Fujita, Keita Maejima, Hiroshi Okamura, Masaki Tsugawa, Yuji Ikeda, Yohei Kushida, Emiko Kawarasaki
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Patent number: 9848520Abstract: A component mounting apparatus includes a carriage that holds a part feeder for supplying a component in a state of being attached to a base and attaches the part feeder to the base in a state of being coupled to the base; a mounting head that mounts the component to a substrate after the component is taken out of the part feeder held by the carriage coupled to the base through an opening formed between the base and a cover member formed so as to cover an upward side of the base; and a shutter moved from an opened position in which the opening is opened to a closed position in which the opening is closed when the carriage is separated from the base.Type: GrantFiled: September 22, 2015Date of Patent: December 19, 2017Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Syozo Kadota, Yasuyuki Ishitani, Tadashi Endo, Tomoo Hama, Toshihiko Nagaya, Hiroshi Okamura, Hiroyuki Fujiwara, Makoto Nakashima
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Publication number: 20170255152Abstract: A motor connection detecting device includes: a bipolar stepping motor; a motor driver adapted to control current to be supplied to the bipolar stepping motor; and a controller connected to the bipolar stepping motor and the motor driver. The controller detects voltage of regenerative current generated during motor ON time in which current flows in the bipolar stepping motor, and determines abnormal connection of the bipolar stepping motor. The detected voltage is voltage generated during a fast decay period according to a current attenuation method of the regenerative current.Type: ApplicationFiled: February 9, 2017Publication date: September 7, 2017Applicant: Ricoh Company, Ltd.Inventors: Hiroshi OKAMURA, Tomohide KONDOH, Hayato FUJITA
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Patent number: 9499363Abstract: A sheet thickness detector incorporated in an image forming apparatus includes a sheet conveying member to rotate and convey a sheet in a sheet conveyance direction, a driven sheet conveying member to contact the sheet conveying member and form at least one first transfer nip therebetween in a lateral direction and to displace by an amount equivalent to a thickness of the sheet passing through the first transfer nip and rotated with the sheet conveying member in the sheet conveyance direction, a displacement member to contact the sheet conveying member and form a second transfer nip smaller than the first transfer nip in the lateral direction and to displace by an amount equivalent to the thickness of the sheet passing through the second transfer nip and supported at a support member, and a displacement amount detector to detect an amount of displacement of the displacement member.Type: GrantFiled: December 31, 2014Date of Patent: November 22, 2016Assignee: Ricoh Company, Ltd.Inventors: Yuu Wakabayashi, Ryo Takenaka, Masashi Satoh, Shingo Nishizaki, Yusuke Ozaki, Yuji Ikeda, Hiroshi Okamura, Naohiro Funada, Tomohide Kondoh
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Publication number: 20160120037Abstract: A component mounting apparatus includes a carriage that holds a part feeder for supplying a component in a state of being attached to a base and attaches the part feeder to the base in a state of being coupled to the base; a mounting head that mounts the component to a substrate after the component is taken out of the part feeder held by the carriage coupled to the base through an opening formed between the base and a cover member formed so as to cover an upward side of the base; and a shutter moved from an opened position in which the opening is opened to a closed position in which the opening is closed when the carriage is separated from the base.Type: ApplicationFiled: September 22, 2015Publication date: April 28, 2016Inventors: Syozo KADOTA, Yasuyuki ISHITANI, Tadashi ENDO, Tomoo HAMA, Toshihiko NAGAYA, Hiroshi OKAMURA, Hiroyuki FUJIWARA, Makoto NAKASHIMA
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Publication number: 20160030970Abstract: A paste application device includes a substrate holding part that holds a substrate, an application head that applies paste to the substrate, a test-application stage where test-application of the paste is performed, an imaging camera that images the paste applied to the test-application stage by the application head from a lateral direction, and a storage part that stores an image imaged by the imaging camera.Type: ApplicationFiled: March 6, 2014Publication date: February 4, 2016Inventors: Hiroshi OKAMURA, Masaaki TOKUNAGA, Hiroshi OGATA, Toshihiko NAGAYA
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Patent number: 9227216Abstract: An adhering amount detecting process includes: lowering the nozzle to a trial application position; performing a trial application to apply the viscous material to a trial application surface disposed on an application stage; and detecting an amount of the viscous material adhering to the nozzle. Then, whether a difference between maximum and minimum values of the amounts of the viscous material adhering to the nozzle detected by performing the adhering amount detecting process a plurality of times exceeds a threshold is determined. If the difference is determined as not exceeding the threshold, the lowered position of the nozzle with respect to the application target is set such that a gap between the nozzle at the lowered position and an application surface of an application target coincides with a gap between the nozzle at the trial application position and the trial application surface.Type: GrantFiled: August 21, 2014Date of Patent: January 5, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventor: Hiroshi Okamura
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Publication number: 20150108714Abstract: A sheet thickness detector incorporated in an image forming apparatus includes a sheet conveying member to rotate and convey a sheet in a sheet conveyance direction, a driven sheet conveying member to contact the sheet conveying member and form at least one first transfer nip therebetween in a lateral direction and to displace by an amount equivalent to a thickness of the sheet passing through the first transfer nip and rotated with the sheet conveying member in the sheet conveyance direction, a displacement member to contact the sheet conveying member and form a second transfer nip smaller than the first transfer nip in the lateral direction and to displace by an amount equivalent to the thickness of the sheet passing through the second transfer nip and supported at a support member, and a displacement amount detector to detect an amount of displacement of the displacement member.Type: ApplicationFiled: December 31, 2014Publication date: April 23, 2015Applicant: RICOH COMPANY, LTD.Inventors: Yuu WAKABAYASHI, Ryo TAKENAKA, Masashi SATOH, Shingo NISHIZAKI, Yusuke OZAKI, Yuji IKEDA, Hiroshi OKAMURA, Naohiro FUNADA, Tomohide KONDOH
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Publication number: 20150079272Abstract: An adhering amount detecting process includes: lowering the nozzle to a trial application position; performing a trial application to apply the viscous material to a trial application surface disposed on an application stage; and detecting an amount of the viscous material adhering to the nozzle. Then, whether a difference between maximum and minimum values of the amounts of the viscous material adhering to the nozzle detected by performing the adhering amount detecting process a plurality of times exceeds a threshold is determined. If the difference is determined as not exceeding the threshold, the lowered position of the nozzle with respect to the application target is set such that a gap between the nozzle at the lowered position and an application surface of an application target coincides with a gap between the nozzle at the trial application position and the trial application surface.Type: ApplicationFiled: August 21, 2014Publication date: March 19, 2015Inventor: Hiroshi OKAMURA
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Patent number: 8950750Abstract: A sheet thickness detector incorporated in an image forming apparatus includes a sheet conveying member to rotate and convey a sheet in a sheet conveyance direction, a driven sheet conveying member to contact the sheet conveying member and form at least one first transfer nip therebetween in a lateral direction and to displace by an amount equivalent to a thickness of the sheet passing through the first transfer nip and rotated with the sheet conveying member in the sheet conveyance direction, a displacement member to contact the sheet conveying member and form a second transfer nip smaller than the first transfer nip in the lateral direction and to displace by an amount equivalent to the thickness of the sheet passing through the second transfer nip and supported at a support member, and a displacement amount detector to detect an amount of displacement of the displacement member.Type: GrantFiled: June 28, 2013Date of Patent: February 10, 2015Assignee: Ricoh Company, Ltd.Inventors: Yuu Wakabayashi, Ryo Takenaka, Masashi Satoh, Shingo Nishizaki, Yusuke Ozaki, Yuji Ikeda, Hiroshi Okamura, Naohiro Funada, Tomohide Kondoh
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Patent number: 8794626Abstract: A sheet thickness detecting device for detecting a thickness of a sheet includes a fixed roller rotatably supported by a shaft so that the fixed roller faces the sheet; a movable roller rotatably provided so that the movable roller and the fixed roller sandwich and feed the sheet, and configured to be displaced in accordance with the thickness of the sandwiched sheet; a swing member rotatably supporting the movable roller and including a shaft so that the swing member is swung around the shaft, wherein the swing member further includes a detection target part formed in a manner that a distance between the detection target part and the shaft is greater than that between a position where the movable roller is supported by the swing member and the shaft; and a detecting unit detecting the displacement amount of the detection target part of the swing member.Type: GrantFiled: February 1, 2013Date of Patent: August 5, 2014Assignee: Ricoh Company, Ltd.Inventors: Ryo Takenaka, Shingo Nishizaki, Yusuke Ozaki, Masashi Satoh, Hiroshi Adachi, Hiroshi Okamura, Naohiro Funada, Yuji Ikeda
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Publication number: 20140015192Abstract: A sheet thickness detector incorporated in an image forming apparatus includes a sheet conveying member to rotate and convey a sheet in a sheet conveyance direction, a driven sheet conveying member to contact the sheet conveying member and form at least one first transfer nip therebetween in a lateral direction and to displace by an amount equivalent to a thickness of the sheet passing through the first transfer nip and rotated with the sheet conveying member in the sheet conveyance direction, a displacement member to contact the sheet conveying member and form a second transfer nip smaller than the first transfer nip in the lateral direction and to displace by an amount equivalent to the thickness of the sheet passing through the second transfer nip and supported at a support member, and a displacement amount detector to detect an amount of displacement of the displacement member.Type: ApplicationFiled: June 28, 2013Publication date: January 16, 2014Applicant: RICOH COMPANY, LTD.Inventors: Yuu WAKABAYASHI, Ryo TAKENAKA, Masashi SATOH, Shingo NISHIZAKI, Yusuke OZAKI, Yuji IKEDA, Hiroshi OKAMURA, Naohiro FUNADA, Tomohide KONDOH
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Patent number: 8563239Abstract: It is intended to provide a solid support capable of immobilizing nucleic acid molecules in a high proportion, and with a high bond strength to nucleic acid molecules. The solid support comprises a substrate and, provided thereon, an electrostatic layer for electrostatically attracting nucleic acid molecules and functional groups capable of covalently binding to nucleic acid molecules.Type: GrantFiled: October 6, 2008Date of Patent: October 22, 2013Assignee: Toyo Kohan Co., Ltd.Inventors: Hiroshi Okamura, Michifumi Tanga, Hirofumi Yamano, Mitsuyoshi Ohba
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Patent number: 8551765Abstract: It is intended to provide a solid support capable of immobilizing nucleic acid molecules in a high proportion, and with a high bond strength to nucleic acid molecules. The solid support comprises a substrate and, provided thereon, an electrostatic layer for electrostatically attracting nucleic acid molecules and functional groups capable of covalently binding to nucleic acid molecules.Type: GrantFiled: July 3, 2003Date of Patent: October 8, 2013Assignee: Toyo Kohan Co., Ltd.Inventors: Hiroshi Okamura, Michifumi Tanga, Hirofumi Yamano, Mitsuyoshi Ohba
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Publication number: 20130200565Abstract: A sheet thickness detecting device for detecting a thickness of a sheet includes a fixed roller rotatably supported by a shaft so that the fixed roller faces the sheet; a movable roller rotatably provided so that the movable roller and the fixed roller sandwich and feed the sheet, and configured to be displaced in accordance with the thickness of the sandwiched sheet; a swing member rotatably supporting the movable roller and including a shaft so that the swing member is swung around the shaft, wherein the swing member further includes a detection target part formed in a manner that a distance between the detection target part and the shaft is greater than that between a position where the movable roller is supported by the swing member and the shaft; and a detecting unit detecting the displacement amount of the detection target part of the swing member.Type: ApplicationFiled: February 1, 2013Publication date: August 8, 2013Inventors: Ryo TAKENAKA, Shingo NISHIZAKI, Yusuke OZAKI, Masashi SATOH, Hiroshi ADACHI, Hiroshi OKAMURA, Naohiro FUNADA, Yuji IKEDA
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Patent number: 8428338Abstract: A method of determining a solder paste height of solder paste printed on a circuit board, the method including obtaining a two-dimensional image of the circuit board which is captured from above a solder printed surface, and determining the solder paste height corresponding to a pixel value of each of pixels of the two-dimensional image, based on height information which defines a relationship between the pixel value and the solder paste height, the pixel value being a value representing at least one of luminance of red in a RGB color model, luminance of green in the RGB color model, luminance of blue in the RGB color model, hue in a HSI color model, saturation in the HSI color model, and intensity in the HSI color model.Type: GrantFiled: February 20, 2012Date of Patent: April 23, 2013Assignee: Panasonic CorporationInventors: Masanori Ikeda, Michinori Tomomatsu, Masahiro Taniguchi, Yousuke Hassaku, Hiroshi Okamura
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Publication number: 20130089239Abstract: A method of determining a solder paste height of solder paste printed on a circuit board, the method including obtaining a two-dimensional image of the circuit board which is captured from above a solder printed surface, and determining the solder paste height corresponding to a pixel value of each of pixels of the two-dimensional image, based on height information which defines a relationship between the pixel value and the solder paste height, the pixel value being a value representing at least one of luminance of red in a RGB color model, luminance of green in the RGB color model, luminance of blue in the RGB color model, hue in a HSI color model, saturation in the HSI color model, and intensity in the HSI color model.Type: ApplicationFiled: February 20, 2012Publication date: April 11, 2013Inventors: Masanori Ikeda, Michinori Tomomatsu, Masahiro Taniguchi, Yousuke Hassaku, Hiroshi Okamura