SHEET CONVEYING DEVICE, IMAGE READING DEVICE, AND IMAGE FORMING DEVICE

• Main Authors: NONOYAMA MASAHIRO, MASUDA JUNICHI, KAMIYA MASAHIRO, SAKAI KATSUHIDE, KIMURA HIROSHI
• Format: Patent
• Language: English; Japanese
• Published: 08.10.2020
• Subjects: CONVEYING; HANDLING THIN OR FILAMENTARY MATERIAL; HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES; PACKING; PERFORMING OPERATIONS; STORING; TRANSPORTING

To provide a sheet conveying device and an image forming device capable of preventing a double-feeding detection sensor thereof from performing an erroneous determination caused by an influence from the outside of the device.SOLUTION: On a sheet conveying path from a feed roller 201 of a sheet conveying device 100 to a resister roller pair 205, transmitting means 301 and receiving means 302 which form a double-feeding detection sensor for detecting the double-feeding by irradiating an ultrasonic wave to a sheet are disposed below and above a conveyance guide 203, respectively. A conductive shield member 600 is disposed between the receiving means 302 and an exterior part 211 of the sheet conveying device 100. The conductive shield member 600 is larger than the receiving means 302 in a plan view from above and is disposed so as to cover the receiving means 302, and thereby the reduction in detection accuracy of double-feeding caused by an influence from the outside of the device is prevented.SELECTED DRAWING: Figure 6 【課題】装置外からの影響に起因する重送検知センサーから誤判定を防止することができるシート搬送装置および画像形成装置を提供する。【解決手段】シート搬送装置１００の給紙ローラー２０１からレジストローラー対２０５に至るシート搬送経路上に、シートに超音波を照射して重送を検知する重送検知センサーを構成する発信手段３０１と受信手段３０２とのうち、発信手段３０１を搬送ガイド２０３の下方に配設し、受信手段３０２を搬送ガイド２０３の上方に配設する。受信手段３０２とシート搬送装置１００の外装２１１との間に導電性遮蔽部材６００を配設する。導電性遮蔽部材６００は、上方からの平面視において、受信手段３０２よりも大きくなっており、受信手段３０２を覆うように配設されているので、装置外からの影響に起因する重送検知の精度低下を防止する。【選択図】図６