Patents by Inventor TSUYOSHI SHIBAYAMA
TSUYOSHI SHIBAYAMA 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: 11958710Abstract: A sheet detection device includes, as detection pieces, a first detection piece integrally provided on a rotary shaft and a second detection piece attached to the first detection piece via a biasing member. The second detection piece is capable of rotation in conjunction with the first detection piece under a biasing force of the biasing member. When the second detection piece is brought into contact with a ceiling at an upper part of the rotary shaft, the second detection piece stops further rotation while the first detection piece is capable of rotation together with the rotary shaft against the biasing force.Type: GrantFiled: September 20, 2021Date of Patent: April 16, 2024Assignee: SHARP KABUSHIKI KAISHAInventors: Yuki Taniguchi, Tsuyoshi Shibayama
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Patent number: 11774897Abstract: An image forming apparatus includes a paper discharging tray and a paper detection part disposed at an upstream end of the paper discharging tray in a paper discharge direction. The paper detection part includes a base end member provided rotatably around a first axis extending in a direction perpendicular to a paper discharge direction and a tip member pivoted to the base end member to rotate around a second axis parallel to the first axis, and extending downwardly to incline toward an upstream side of the paper discharge direction in a state where the base end member is not subjected to pressure from the paper being discharged. The base end member is disposed to face a discharge opening when being at the reference position, and the image forming apparatus stops discharging paper from the discharge opening when the base end member rotates by a predetermined threshold or more with respect to the reference position.Type: GrantFiled: October 18, 2022Date of Patent: October 3, 2023Assignee: SHARP KABUSHIKI KAISHAInventors: Tsuyoshi Shibayama, Yuki Taniguchi
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Publication number: 20230042587Abstract: An image forming apparatus includes a paper discharging tray and a paper detection part disposed at an upstream end of the paper discharging tray in a paper discharge direction. The paper detection part includes a base end member provided rotatably around a first axis extending in a direction perpendicular to a paper discharge direction and a tip member pivoted to the base end member to rotate around a second axis parallel to the first axis, and extending downwardly to incline toward an upstream side of the paper discharge direction in a state where the base end member is not subjected to pressure from the paper being discharged. The base end member is disposed to face a discharge opening when being at the reference position, and the image forming apparatus stops discharging paper from the discharge opening when the base end member rotates by a predetermined threshold or more with respect to the reference position.Type: ApplicationFiled: October 18, 2022Publication date: February 9, 2023Inventors: TSUYOSHI SHIBAYAMA, Yuki TANIGUCHI
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Patent number: 11520269Abstract: An image forming apparatus includes a paper discharging tray and a paper detection part disposed at an upstream end of the paper discharging tray in a paper discharge direction. The paper detection part includes a base end member provided rotatably around a first axis extending in a direction perpendicular to a paper discharge direction and a tip member pivoted to the base end member to rotate around a second axis parallel to the first axis, and extending downwardly to incline toward an upstream side of the paper discharge direction in a state where the base end member is not subjected to pressure from the paper being discharged. The base end member is disposed to face a discharge opening when being at the reference position, and the image forming apparatus stops discharging paper from the discharge opening when the base end member rotates by a predetermined threshold or more with respect to the reference position.Type: GrantFiled: July 14, 2021Date of Patent: December 6, 2022Assignee: SHARP KABUSHIKI KAISHAInventors: Tsuyoshi Shibayama, Yuki Taniguchi
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Patent number: 11325796Abstract: A sheet feeding device includes a sheet feeding cassette, which is detachable with respect to a sheet feeding cassette mounting portion provided on an image forming device body. The sheet feeding cassette includes a storage portion that stores a paper sheet, a first regulator provided on a bottom portion of the storage portion that regulates the position of a paper sheet, and a movable placement plate that upwardly pushes a paper sheet stored in the storage portion. The movable placement plate includes a second regulator that regulates the position of a paper sheet having a different size to the size of a paper sheet that can be regulated by the first regulator.Type: GrantFiled: August 22, 2019Date of Patent: May 10, 2022Assignee: SHARP KABUSHIKI KAISHAInventors: Tadashi Noguchi, Kohji Aoki, Tsuyoshi Shibayama, Masaharu Kimura, Haruhisa Furumoto
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Publication number: 20220112042Abstract: A sheet detection device includes, as detection pieces, a first detection piece integrally provided on a rotary shaft and a second detection piece attached to the first detection piece via a biasing member. The second detection piece is capable of rotation in conjunction with the first detection piece under a biasing force of the biasing member. When the second detection piece is brought into contact with a ceiling at an upper part of the rotary shaft, the second detection piece stops further rotation while the first detection piece is capable of rotation together with the rotary shaft against the biasing force.Type: ApplicationFiled: September 20, 2021Publication date: April 14, 2022Inventors: Yuki TANIGUCHI, TSUYOSHI SHIBAYAMA
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Publication number: 20220057739Abstract: An image forming apparatus includes a paper discharging tray and a paper detection part disposed at an upstream end of the paper discharging tray in a paper discharge direction. The paper detection part includes a base end member provided rotatably around a first axis extending in a direction perpendicular to a paper discharge direction and a tip member pivoted to the base end member to rotate around a second axis parallel to the first axis, and extending downwardly to incline toward an upstream side of the paper discharge direction in a state where the base end member is not subjected to pressure from the paper being discharged. The base end member is disposed to face a discharge opening when being at the reference position, and the image forming apparatus stops discharging paper from the discharge opening when the base end member rotates by a predetermined threshold or more with respect to the reference position.Type: ApplicationFiled: July 14, 2021Publication date: February 24, 2022Inventors: TSUYOSHI SHIBAYAMA, Yuki TANIGUCHI
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Patent number: 11247862Abstract: A detector includes a first member that makes contact with an upper surface of a paper sheet stored in a sheet feeding cassette, and a second member that supports the first member such that it is capable changing postures, while also movably supporting the first member in an up-and-down direction to coincide with the upper surface of a paper sheet stored in the sheet feeding cassette. The first member has a guide portion that makes contact with the sheet feeding cassette and/or a paper sheet stored in the sheet feeding cassette. The first member changes postures with respect to the second member as a result of the guide portion making contact with the sheet feeding cassette and/or a paper sheet stored in the sheet feeding cassette.Type: GrantFiled: August 15, 2019Date of Patent: February 15, 2022Assignee: SHARP KABUSHIKI KAISHAInventor: Tsuyoshi Shibayama
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Publication number: 20200071108Abstract: A detector includes a first member that makes contact with an upper surface of a paper sheet stored in a sheet feeding cassette, and a second member that supports the first member such that it is capable changing postures, while also movably supporting the first member in an up-and-down direction to coincide with the upper surface of a paper sheet stored in the sheet feeding cassette. The first member has a guide portion that makes contact with the sheet feeding cassette and/or a paper sheet stored in the sheet feeding cassette. The first member changes postures with respect to the second member as a result of the guide portion making contact with the sheet feeding cassette and/or a paper sheet stored in the sheet feeding cassette.Type: ApplicationFiled: August 15, 2019Publication date: March 5, 2020Inventor: TSUYOSHI SHIBAYAMA
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Publication number: 20200062519Abstract: A sheet feeding device includes a sheet feeding cassette, which is detachable with respect to a sheet feeding cassette mounting portion provided on an image forming device body. The sheet feeding cassette includes a storage portion that stores a paper sheet, a first regulator provided on a bottom portion of the storage portion that regulates the position of a paper sheet, and a movable placement plate that upwardly pushes a paper sheet stored in the storage portion. The movable placement plate includes a second regulator that regulates the position of a paper sheet having a different size to the size of a paper sheet that can be regulated by the first regulator.Type: ApplicationFiled: August 22, 2019Publication date: February 27, 2020Inventors: TADASHI NOGUCHI, KOHJI AOKI, TSUYOSHI SHIBAYAMA, MASAHARU KIMURA, HARUHISA FURUMOTO
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Publication number: 20200010291Abstract: In a sheet feeder that feeds a sheet to an image forming apparatus, a sheet placing table has a placement surface on which a sheet is placed and is inclined downward toward a downstream side in a sheet feeding direction. A sheet detecting unit has an operation piece that presses a leading end of the sheet toward an upstream side in the sheet feeding direction with predetermined pressure. A regulating member is arranged in a vicinity of an end part of the sheet placing table on the upstream side in the sheet feeding direction. The regulating member regulates movement of the sheet to the upstream side in the sheet feeding direction and has regulating portions having different heights from the placement surface of the sheet placing table. The regulating portions are arranged so that the heights are increased toward the upstream side in the sheet feeding direction.Type: ApplicationFiled: June 20, 2019Publication date: January 9, 2020Inventors: TSUYOSHI SHIBAYAMA, MASAHARU KIMURA