Patents by Inventor Yuuki Shiga
Yuuki Shiga 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: 11767185Abstract: A sheet conveying device includes a pair of rollers, a biasing member, a guide member, a biasing support, and a biasing force changer. The pair of rollers includes a first roller and a second roller disposed in contact with the first roller. The pair of rollers is configured to hold a sheet between the first roller and the second roller. The biasing member is configured to bias the first roller toward the second roller. The biasing support is configured to support the biasing member and has a guide target member configured to slide along the guide member to move the biasing support. The biasing force changer is configured to change a biasing force of the biasing member along with movement of the biasing support. The guide target member has a portion projecting into a sheet conveyance passage through which the sheet is conveyed by the pair of rollers.Type: GrantFiled: January 6, 2021Date of Patent: September 26, 2023Assignee: Ricoh Company, Ltd.Inventors: Yasuhide Fukushima, Yu Wakabayashi, Yuuki Shiga, Kazuya Yamamoto, Ryohhei Ohya
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Patent number: 11708234Abstract: A sheet conveying device includes a pair of rollers including a first roller and a second roller to hold a sheet conveyed between the first and second rollers; a biasing member to bias the first roller toward the second roller; a biasing force changer to change a biasing force of the biasing member; control circuitry to, when a predetermined changing condition is met, cause the changer to change the biasing force and cause the rollers to convey the sheet; an operation detector to detect a changing operation of the changer; and a notification device to notify an abnormality of the changing operation when the operation detector detects the abnormality. When the operation detector detects the abnormality, the control circuitry performs sheet conveyance control to cause the rollers to convey the sheet without causing the changer to change the biasing force, regardless of whether the predetermined changing condition is met.Type: GrantFiled: January 11, 2021Date of Patent: July 25, 2023Assignee: RICOH COMPANY, LTD.Inventors: Yu Wakabayashi, Kazuya Yamamoto, Yasuhide Fukushima, Yuuki Shiga, Ryohhei Ohya
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Patent number: 11442390Abstract: A sheet conveying device includes conveyance passage forming bodies to define a sheet conveyance passage, a nip forming body to form a conveying nip region in the sheet conveyance passage, and a flexible plate body having a support portion to be attached to another body and having a downstream-side end portion as a free end in a sheet conveying direction. The support portion of the flexible plate body is located on an upstream side in the sheet conveying direction with respect to the conveying nip region. The free end being located on a downstream side in the sheet conveying direction with respect to the conveying nip region.Type: GrantFiled: January 29, 2019Date of Patent: September 13, 2022Assignee: RICOH COMPANY, LTD.Inventors: Yuuki Shiga, Hideto Higaki, Jumpei Aoyama, Hirofumi Horita, Junpei Kamichi
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Publication number: 20210221636Abstract: A sheet conveying device includes a pair of rollers including a first roller and a second roller to hold a sheet conveyed between the first and second rollers; a biasing member to bias the first roller toward the second roller; a biasing force changer to change a biasing force of the biasing member; control circuitry to, when a predetermined changing condition is met, cause the changer to change the biasing force and cause the rollers to convey the sheet; an operation detector to detect a changing operation of the changer; and a notification device to notify an abnormality of the changing operation when the operation detector detects the abnormality. When the operation detector detects the abnormality, the control circuitry performs sheet conveyance control to cause the rollers to convey the sheet without causing the changer to change the biasing force, regardless of whether the predetermined changing condition is met.Type: ApplicationFiled: January 11, 2021Publication date: July 22, 2021Applicant: Ricoh Company, Ltd.Inventors: Yu WAKABAYASHI, Kazuya YAMAMOTO, Yasuhide FUKUSHIMA, Yuuki SHIGA, Ryohhei OHYA
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Publication number: 20210214176Abstract: A sheet conveying device includes a pair of rollers, a biasing member, a guide member, a biasing support, and a biasing force changer. The pair of rollers includes a first roller and a second roller disposed in contact with the first roller. The pair of rollers is configured to hold a sheet between the first roller and the second roller. The biasing member is configured to bias the first roller toward the second roller. The biasing support is configured to support the biasing member and has a guide target member configured to slide along the guide member to move the biasing support. The biasing force changer is configured to change a biasing force of the biasing member along with movement of the biasing. support. The guide target member has a portion projecting into a sheet conveyance passage through which the sheet is conveyed by the pair of rollers.Type: ApplicationFiled: January 6, 2021Publication date: July 15, 2021Applicant: Ricoh Company, Ltd.Inventors: Yasuhide FUKUSHIMA, Yu WAKABAYASHI, Yuuki SHIGA, Kazuya YAMAMOTO, Ryohhei OHYA
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Patent number: 10865059Abstract: A sheet container includes a bottom plate, a regulating body, and a holding body. The bottom plate is disposed movable and has a bottom plate-side contact portion. The regulating body regulates a position of a trailing end of a sheet. The holding body has a holding body-side contact portion and to hold the regulating body. The bottom plate and the holding body have a gap between the bottom plate-side contact portion of the bottom plate and the holding body-side contact portion of the holding body in a state in which the bottom plate is not rotated. The bottom plate-side contact portion of the bottom plate and the holding body-side contact portion of the holding body contact with each other along with rotation of the bottom plate. The holding body moves to a downstream side in a sheet feeding direction in conjunction with the rotation of the bottom plate.Type: GrantFiled: January 16, 2019Date of Patent: December 15, 2020Assignee: Ricoh Company, Ltd.Inventors: Jumpei Aoyama, Hirofumi Horita, Yuuki Shiga, Junpei Kamichi, Hideto Higaki, Fumihiro Tsunoda
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Patent number: 10429786Abstract: A drive transmission device, which is included in an image forming apparatus, includes a drive transmission body to which a drive force is applied from a driving source, and a rotary shaft having a press-in portion mounted on one end thereof in the axial direction. The press-in portion has multiple planes disposed parallel to an axial direction and configured to receive the drive transmission body. The multiple planes include upstream and downstream side planes disposed downstream from the upstream side plane in a press-in direction of the drive transmission body. The upstream and downstream side planes are aligned along the press-in direction of the drive transmission body and have respective distances different from each other from an axial center of the rotary shaft. A distance from the downstream side plane to the axial center is greater than a distance from the upstream side plane to the axial center.Type: GrantFiled: July 12, 2018Date of Patent: October 1, 2019Assignee: RICOH COMPANY, LTD.Inventors: Kenji Tomita, Junpei Kamichi, Hiroaki Nieda, Kimihiro Tanaka, Hideto Higaki, Yuuki Shiga, Jumpei Aoyama, Hirofumi Horita
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Publication number: 20190243296Abstract: A sheet conveying device includes conveyance passage forming bodies to define a sheet conveyance passage, a nip forming body to form a conveying nip region in the sheet conveyance passage, and a flexible plate body having a support portion to be attached to another body and having a downstream-side end portion as a free end in a sheet conveying direction. The support portion of the flexible plate body is located on an upstream side in the sheet conveying direction with respect to the conveying nip region. The free end being located on a downstream side in the sheet conveying direction with respect to the conveying nip region.Type: ApplicationFiled: January 29, 2019Publication date: August 8, 2019Applicant: Ricoh Company, Ltd.Inventors: Yuuki Shiga, Hideto Higaki, Jumpei Aoyama, Hirofumi Horita, Junpei Kamichi
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Publication number: 20190225438Abstract: A sheet container includes a bottom plate, a regulating body, and a holding body. The bottom plate is disposed movable and has a bottom plate-side contact portion. The regulating body regulates a position of a trailing end of a sheet. The holding body has a holding body-side contact portion and to hold the regulating body. The bottom plate and the holding body have a gap between the bottom plate-side contact portion of the bottom plate and the holding body-side contact portion of the holding body in a state in which the bottom plate is not rotated. The bottom plate-side contact portion of the bottom plate and the holding body-side contact portion of the holding body contact with each other along with rotation of the bottom plate. The holding body moves to a downstream side in a sheet feeding direction in conjunction with the rotation of the bottom plate.Type: ApplicationFiled: January 16, 2019Publication date: July 25, 2019Applicant: Ricoh Company, Ltd.Inventors: Jumpei AOYAMA, Hirofumi HORITA, Yuuki SHIGA, Junpei KAMICHI, Hideto HIGAKI, Fumihiro TSUNODA
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Patent number: 10345754Abstract: A sheet conveying device, which is included in an image forming apparatus, includes first and second sheet conveying bodies to contact each other, a cover to move relative to an apparatus body of the image forming apparatus, and a connecting body to connect the cover and the second sheet conveying body. The second sheet conveying body separates from the first sheet conveying body along with an opening movement of the cover. The connecting body includes a first connecting portion connected to the cover and a second connecting portion connected to the second sheet conveying body. At least one of a connection with the cover and a connection with the second sheet conveying body is released when the cover is closed. The connecting body is brought into connection with the cover or the second sheet conveying body.Type: GrantFiled: May 11, 2017Date of Patent: July 9, 2019Assignee: Ricoh Company, Ltd.Inventor: Yuuki Shiga
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Publication number: 20190018353Abstract: A drive transmission device, which is included in an image forming apparatus, includes a drive transmission body to which a drive force is applied from a driving source, and a rotary shaft having a press-in portion mounted on one end thereof in the axial direction. The press-in portion has multiple planes disposed parallel to an axial direction and configured to receive the drive transmission body. The multiple planes include upstream and downstream side planes disposed downstream from the upstream side plane in a press-in direction of the drive transmission body. The upstream and downstream side planes are aligned along the press-in direction of the drive transmission body and have respective distances different from each other from an axial center of the rotary shaft. A distance from the downstream side plane to the axial center is greater than a distance from the upstream side plane to the axial center.Type: ApplicationFiled: July 12, 2018Publication date: January 17, 2019Applicant: Ricoh Company, Ltd.Inventors: Kenji TOMITA, Junpei Kamichi, Hiroaki Nieda, Kimihiro Tanaka, Hideto Higaki, Yuuki Shiga, Jumpei Aoyama, Hirofumi Horita
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Publication number: 20170343955Abstract: A sheet conveying device, which is included in an image forming apparatus, includes first and second sheet conveying bodies to contact each other, a cover to move relative to an apparatus body of the image forming apparatus, and a connecting body to connect the cover and the second sheet conveying body. The second sheet conveying body separates from the first sheet conveying body along with an opening movement of the cover. The connecting body includes a first connecting portion connected to the cover and a second connecting portion connected to the second sheet conveying body. At least one of a connection with the cover and a connection with the second sheet conveying body is released when the cover is closed. The connecting body is brought into connection with the cover or the second sheet conveying body.Type: ApplicationFiled: May 11, 2017Publication date: November 30, 2017Applicant: Ricoh Company, Ltd.Inventor: Yuuki Shiga
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Patent number: 9244417Abstract: An image forming apparatus includes an image bearer, an image forming unit, an intermediate transfer member, a secondary transfer member, an image detector, a computing device, and a conveyor device. The computing device calculates a traveling speed of the intermediate transfer member based on detection information provided by the image detector. The conveyor device continuously transports to a secondary transfer portion a plurality of recording media one by one at a predetermined interval between successive recording media. The image forming unit forms a test image at a space between successive recording-medium contact regions of the intermediate transfer member at which the recording medium contacts the intermediate transfer member. A travel distance of the intermediate transfer member from the detection position on the intermediate transfer member to the secondary transfer portion in a traveling direction thereof is shorter than the space between the successive recording-medium contact regions.Type: GrantFiled: December 1, 2014Date of Patent: January 26, 2016Assignee: Ricoh Company, Ltd.Inventors: Mizuna Tanaka, Yuuki Shiga, Kimihiro Tanaka, Toshikane Nishii, Akimitsu Obana
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Patent number: 9188933Abstract: A power supply device to electroconductively connect a power-fed terminal included in a power-fed unit and a power supply terminal of a power supply board. The power supply device includes a unit contact portion to contact the power-fed terminal; a board contact portion to contact the power supply board; a connector to connect the unit contact portion and the board contact portion; and a support member to support the unit contact portion, the board contact portion, and the connector. The unit contact portion is held on an inner face of the support member opposed to the power-fed unit; the board contact portion is held on an outer face of the support member opposed to the power supply board; and the connector connects the unit contact portion and the board contact portion through the support member.Type: GrantFiled: October 29, 2013Date of Patent: November 17, 2015Assignee: RICOH COMPANY, LTD.Inventors: Kaoru Tada, Kozo Yamazaki, Tatsuo Fukushima, Yuuki Shiga, Haruo Hashimoto
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Patent number: 9182719Abstract: A moving device assembly includes a moving device and a shield. The moving device is movable between a first position and a second position, to move a detector including a detection surface relative to an opposing member disposed opposite the detector. The shield shields the detection surface of the detector. As the moving device is at the first position, the detector is at a proximal position at which the detector is near the opposing member, and as the moving device is at the second position, the detector is at a shield position at which the detector is separated from the opposing member and the detection surface of the detector is shielded by the shield.Type: GrantFiled: April 13, 2015Date of Patent: November 10, 2015Assignee: Ricoh Company, Ltd.Inventors: Yuuki Shiga, Sei Onuma, Kozo Yamazaki, Kimihiro Tanaka
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Publication number: 20150220033Abstract: A moving device assembly includes a moving device and a shield. The moving device is movable between a first position and a second position, to move a detector including a detection surface relative to an opposing member disposed opposite the detector. The shield shields the detection surface of the detector. As the moving device is at the first position, the detector is at a proximal position at which the detector is near the opposing member, and as the moving device is at the second position, the detector is at a shield position at which the detector is separated from the opposing member and the detection surface of the detector is shielded by the shield.Type: ApplicationFiled: April 13, 2015Publication date: August 6, 2015Inventors: Yuuki SHIGA, Sei Onuma, Kozo Yamazaki, Kimihiro Tanaka
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Publication number: 20150153686Abstract: An image forming apparatus includes an image bearer, an image forming unit, an intermediate transfer member, a secondary transfer member, an image detector, a computing device, and a conveyor device. The computing device calculates a traveling speed of the intermediate transfer member based on detection information provided by the image detector. The conveyor device continuously transports to a secondary transfer portion a plurality of recording media one by one at a predetermined interval between successive recording media. The image forming unit forms a test image at a space between successive recording-medium contact regions of the intermediate transfer member at which the recording medium contacts the intermediate transfer member. A travel distance of the intermediate transfer member from the detection position on the intermediate transfer member to the secondary transfer portion in a traveling direction thereof is shorter than the space between the successive recording-medium contact regions.Type: ApplicationFiled: December 1, 2014Publication date: June 4, 2015Applicant: RICOH COMPANY, LTD.Inventors: Mizuna Tanaka, Yuuki Shiga, Kimihiro Tanaka, Toshikane Nishii, Akimitsu Obana
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Patent number: 9025986Abstract: A moving device assembly includes a moving device and a shield. The moving device is movable between a first position and a second position, to move a detector including a detection surface relative to an opposing member disposed opposite the detector. The shield shields the detection surface of the detector. As the moving device is at the first position, the detector is at a proximal position at which the detector is near the opposing member, and as the moving device is at the second position, the detector is at a shield position at which the detector is separated from the opposing member and the detection surface of the detector is shielded by the shield.Type: GrantFiled: May 23, 2013Date of Patent: May 5, 2015Assignee: Ricoh Company, Ltd.Inventors: Yuuki Shiga, Sei Onuma, Kozo Yamazaki, Kimihiro Tanaka
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Patent number: 8965232Abstract: A positioning device to position a first member relative to a second member includes two convex parts disposed on a side of the first member and apart from each other; and positioning portions disposed on a side of the second member so as to contact the convex parts, each of which is disposed apart from each other and opposed to the two convex parts. The positioning portions includes two planar portions disposed substantially perpendicularly relative to a direction to allow the first member to approach the second member; and a slanted portion disposed in the vicinity of one of the two planar portions and angled with respect to a direction to allow the first member to approach the second member. The second member is an endless belt, on which an image pattern for detection is formed, and the first member is a sensor to detect the image pattern formed on the endless belt.Type: GrantFiled: May 21, 2013Date of Patent: February 24, 2015Assignee: Ricoh Company, Ltd.Inventor: Yuuki Shiga
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Publication number: 20140133881Abstract: A power supply device to electroconductively connect a power-fed terminal included in a power-fed unit and a power supply terminal of a power supply board. The power supply device includes a unit contact portion to contact the power-fed terminal; a board contact portion to contact the power supply board; a connector to connect the unit contact portion and the board contact portion; and a support member to support the unit contact portion, the board contact portion, and the connector. The unit contact portion is held on an inner face of the support member opposed to the power-fed unit; the board contact portion is held on an outer face of the support member opposed to the power supply board; and the connector connects the unit contact portion and the board contact portion through the support member.Type: ApplicationFiled: October 29, 2013Publication date: May 15, 2014Applicant: RICOH COMPANY, LTD.Inventors: Kaoru TADA, Kozo YAMAZAKI, Tatsuo FUKUSHIMA, Yuuki SHIGA, Haruo HASHIMOTO