WO2015182263A1 - Sheet feeding device, automatic document feeder, image formation device, and sheet feeding method - Google Patents

Sheet feeding device, automatic document feeder, image formation device, and sheet feeding method Download PDF

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Publication number
WO2015182263A1
WO2015182263A1 PCT/JP2015/061243 JP2015061243W WO2015182263A1 WO 2015182263 A1 WO2015182263 A1 WO 2015182263A1 JP 2015061243 W JP2015061243 W JP 2015061243W WO 2015182263 A1 WO2015182263 A1 WO 2015182263A1
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WO
WIPO (PCT)
Prior art keywords
roller
gear
driving force
document
output gear
Prior art date
Application number
PCT/JP2015/061243
Other languages
French (fr)
Japanese (ja)
Inventor
悟 米本
Original Assignee
京セラドキュメントソリューションズ株式会社
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Filing date
Publication date
Application filed by 京セラドキュメントソリューションズ株式会社 filed Critical 京セラドキュメントソリューションズ株式会社
Publication of WO2015182263A1 publication Critical patent/WO2015182263A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B65H3/06—Rollers or like rotary separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H11/00—Feed tables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/06—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/14—Retarding or controlling the forward movement of articles as they approach stops

Definitions

  • the present invention relates to a sheet conveying apparatus, an automatic document conveying apparatus, an image forming apparatus, and a sheet conveying method.
  • ADF automatic document feeder
  • the automatic document feeder conveys a document so as to pass over a document reading unit provided in the main body of the image forming apparatus or a document reading unit provided in the automatic document feeder itself.
  • Such an automatic document conveying device includes a sheet conveying device for conveying an original.
  • the sheet conveying device conveys a document using a plurality of rollers that rotate by a driving force transmitted from a driving source such as a motor.
  • the plurality of rollers includes a paper feed roller that feeds the document from the document tray to the transport path, a plurality of transport rollers that transport the document along the transport path, and a discharge roller that discharges the document from the transport path to the discharge tray.
  • the driving force is transmitted to the sheet feed roller via a clutch.
  • the driving force is transmitted to the plurality of transport rollers and the discharge rollers without passing through the clutch.
  • the clutch repeats ON and OFF when feeding a plurality of documents continuously. Accordingly, the rotation of the paper feed roller and the stop of the rotation are repeated, and the originals are fed one by one to the conveyance path.
  • the clutch when the clutch is repeatedly turned ON and OFF, the impact due to the ON and OFF of the clutch is transmitted to the plurality of transport rollers and the discharge rollers. For this reason, when a plurality of documents are continuously conveyed, the plurality of conveyance rollers and the discharge roller may not be able to rotate stably. If the rotation of the plurality of transport rollers and the discharge rollers becomes unstable, the transport speed of the document may change, and the read image of the document may be blurred or misregistrated.
  • Patent Document 1 describes a configuration in which a rotation wheel of a registration roller is provided with a flywheel to stabilize the rotation of the registration roller.
  • the present invention has been made in view of the above problems, and provides a sheet conveying apparatus, an automatic document conveying apparatus, an image forming apparatus, and a sheet conveying method capable of stably rotating a roller without using a flywheel.
  • the purpose is to do.
  • the sheet conveying apparatus includes a first roller, a second roller, a drive source, an output gear, a first gear, a second gear, and a clutch.
  • the first roller is a member for conveying a sheet.
  • the second roller is a member for conveying the sheet.
  • the driving source generates a driving force.
  • the output gear rotates based on the driving force transmitted from the driving source.
  • the first gear is disposed coaxially with the output gear, and rotates with the output gear to transmit a driving force toward the first roller.
  • the second gear is disposed coaxially with the output gear, and rotates with the output gear to transmit a driving force toward the second roller.
  • the clutch switches between transmission of driving force to the second roller and release of the transmission.
  • An automatic document conveying device includes a document tray and the sheet conveying device described above. A document is placed on the document tray.
  • the first roller of the sheet conveying apparatus is a conveying roller that conveys the document along a conveying path.
  • the second roller of the sheet conveying device is a paper feeding roller that feeds the original from the original tray to the conveying path.
  • An image forming apparatus includes the automatic document feeder and the image forming unit.
  • Another image forming apparatus includes a manual feed tray and the sheet conveying device.
  • a recording medium is placed on the manual feed tray.
  • the first roller of the sheet conveying apparatus is a conveying roller that conveys the recording medium along a conveying path.
  • the second roller of the sheet conveying device is a paper feeding roller that feeds the recording medium from the manual feed tray to the conveying path.
  • Still another image forming apparatus forms an image by transferring a toner image to a recording medium.
  • the image forming apparatus includes a transfer device and the sheet conveying device described above.
  • the transfer device transfers a toner image onto the recording medium.
  • the first roller of the sheet conveying apparatus is a conveying roller that conveys the recording medium along a conveying path.
  • the second roller of the sheet conveying device is a registration roller that sends the recording medium to the transfer device.
  • the first roller and the second roller rotate to convey the sheet.
  • the sheet conveying method according to the present invention rotates a first gear and a second gear arranged coaxially with the output gear by driving a driving source and transmitting driving force from the driving source to the output gear. And rotating the first roller and turning on the clutch to transmit the driving force from the second gear to the second roller to rotate the second roller.
  • the roller can be stably rotated without using a flywheel.
  • FIG. 2 is a schematic diagram illustrating a main part of the automatic document feeder according to the first embodiment of the present invention. It is a perspective view which shows the principal part of the sheet conveying apparatus which concerns on Embodiment 1 of this invention. It is a perspective view which expands and shows a part of sheet conveying device concerning Embodiment 1 of the present invention. It is a schematic diagram which shows the output gear of the sheet conveying apparatus which concerns on Embodiment 1 of this invention, a 1st gear, and a 2nd gear.
  • 3 is a flowchart illustrating an operation of the sheet conveying apparatus according to the first exemplary embodiment of the present invention. It is a schematic diagram which shows the structure of the image forming apparatus which concerns on Embodiment 2 of this invention.
  • FIG. 1 is a schematic diagram showing a main part of an automatic document feeder.
  • the automatic document feeder 30 includes a casing 301, a document tray 311, a discharge tray 332, a conveyance path 340, and a reading device 350.
  • the automatic document feeder 30 further includes a paper feed roller group 312, a plurality (three in this case) of transport roller pairs 321, 322, and 323, and a discharge roller pair 331.
  • a paper feed port 301F is formed in the housing 301, and the document tray 311 is attached to the housing 301 corresponding to the paper feed port 301F.
  • a paper feed roller group 312 is disposed inside the housing 301 near the paper feed port 301F. When an instruction to start reading the document D is input to the automatic document feeder 30, the paper feed roller group 312 feeds the document D placed on the document tray 311 to the transport path 340.
  • a plurality of documents D can be placed on the document tray 311.
  • the paper feed roller group 312 repeatedly rotates and stops the rotation, and feeds the documents D from the document tray 311 to the transport path 340 one by one. Specifically, the paper feed roller group 312 repeats rotation and stop of the rotation, so that a document D different from the document D being transported while a document D is being transported along the transport path 340. Is fed to the transport path 340.
  • the paper feed roller group 312 includes a paper feed roller 312a and a pickup roller 312b, and is disposed on the outer peripheral side of the conveyance path 340 having a substantially U shape.
  • the sheet feeding roller 312a is a driving roller to which driving force is transmitted
  • the pickup roller 312b is a driven roller that rotates in accordance with the rotation of the sheet feeding roller 312a.
  • the pickup roller 312b is disposed on the upstream side of the transport path 340 with respect to the paper feed roller 312a.
  • the conveyance path 340 extends from the paper feed opening 301 ⁇ / b> F to the discharge outlet 301 ⁇ / b> H formed in the housing 301.
  • the two transport roller pairs 322, the third transport roller pair 323, and the discharge roller pair 331 are arranged along the transport path 340 in this order.
  • the first transport roller pair 321 includes a first drive roller 321a and a first driven roller 321b in contact with the first drive roller 321a.
  • the first drive roller 321 a is disposed on the inner peripheral side of the conveyance path 340 having a substantially U shape
  • the first driven roller 321 b is disposed on the outer peripheral side of the conveyance path 340.
  • the first driving roller 321a rotates when the driving force is transmitted, and the first driven roller 321b rotates according to the rotation of the first driving roller 321a.
  • the document D is sandwiched between the first drive roller 321 a and the first driven roller 321 b and is transported toward the second transport roller pair 322.
  • the second transport roller pair 322 includes a second drive roller 322a and a second driven roller 322b in contact with the second drive roller 322a.
  • the second drive roller 322 a is disposed on the inner peripheral side of the conveyance path 340 having a substantially U shape
  • the second driven roller 322 b is disposed on the outer peripheral side of the conveyance path 340.
  • the second driving roller 322a rotates when the driving force is transmitted, and the second driven roller 322b rotates according to the rotation of the second driving roller 322a.
  • the document D is sandwiched between the second drive roller 322 a and the second driven roller 322 b and is transported toward the third transport roller pair 323.
  • the third transport roller pair 323 includes a third drive roller 323a and a third driven roller 323b in contact with the third drive roller 323a.
  • the third drive roller 323 a is disposed on the inner peripheral side of the conveyance path 340 having a substantially U shape
  • the third driven roller 323 b is disposed on the outer peripheral side of the conveyance path 340.
  • the third driving roller 323a rotates when the driving force is transmitted, and the third driven roller 323b rotates according to the rotation of the third driving roller 323a.
  • the document D is sandwiched between the third driving roller 323 a and the third driven roller 323 b and is conveyed toward the discharge roller pair 331.
  • the discharge roller pair 331 includes a discharge drive roller 331a and a discharge driven roller 331b in contact with the discharge drive roller 331a.
  • the discharge driving roller 331a is disposed on the inner peripheral side of the conveyance path 340 having a substantially U shape, and the discharge driven roller 331b is disposed on the outer peripheral side of the conveyance path 340.
  • the discharge driving roller 331a rotates, and the discharge driven roller 331b rotates according to the rotation of the discharge driving roller 331a.
  • the document D is sandwiched between the discharge driving roller 331a and the discharge driven roller 331b and sent to the discharge port 301H.
  • the discharge tray 332 is formed on the upper surface of the housing 301, and the document D is discharged from the discharge port 301H to the discharge tray 332.
  • the reading device 350 is disposed between the first drive roller 321a and the second drive roller 322a.
  • the reading device 350 reads an image of the document D transported through the transport path 340 and generates image data.
  • FIG. 2 is a perspective view illustrating a main part of the sheet conveying apparatus.
  • the sheet conveying apparatus 10 includes a motor 131 that is a drive source.
  • the motor 131 is provided on the back side of the support plate 130.
  • the driving force generated from the motor 131 is transmitted to each of the first rotating shaft 141 to the fifth rotating shaft 145 via a gear group provided on the front side of the support plate 130.
  • each of the first rotating shaft 141 to the fourth rotating shaft 144 has a plurality of first rollers 121 attached thereto.
  • a driving force is transmitted from the motor 131 to rotate each of the first to fourth rotating shafts 141 to 144.
  • each 1st roller 121 rotates.
  • the second roller 122 is attached to the fifth rotating shaft 145, and the driving force is transmitted from the motor 131 to rotate the fifth rotating shaft 145. Thereby, the 2nd roller 122 rotates.
  • FIG. 3 is an enlarged perspective view showing a part of the sheet conveying apparatus 10.
  • the output shaft of the motor 131 protrudes to the front side of the support plate 130, and a motor gear 131a is attached to the tip of the output shaft.
  • the motor gear 131a meshes with the output gear 100.
  • Each gear constituting the gear group provided in front of the support plate 130 includes the first gear 101 to the twelfth gear 112 in addition to the output gear 100.
  • the first gear 101 and the second gear 102 are provided coaxially with the output gear 100.
  • the output gear 100 and the first gear 101 to the twelfth gear 112 are rotated by the driving force transmitted from the motor gear 131a.
  • the driving force output from the first gear 101 is transmitted to the third gear 103, the fourth gear 104, and the fifth gear 105 in this order.
  • the third gear 103, the fourth gear 104, and the fifth gear 105 rotate.
  • a first rotating shaft 141 is fixed to the fourth gear 104, and the first rotating shaft 141 rotates integrally with the fourth gear 104.
  • a fourth rotation shaft 144 is fixed to the fifth gear 105, and the fourth rotation shaft 144 rotates integrally with the fifth gear 105. Accordingly, the first drive roller 321a attached to the first rotation shaft 141 and the discharge drive roller 331a attached to the fourth rotation shaft 144 rotate to convey the document D.
  • the driving force output from the first gear 101 is also transmitted to the ninth gear 109, the tenth gear 110, the eleventh gear 111, and the twelfth gear 112 in this order.
  • the ninth gear 109, the tenth gear 110, the eleventh gear 111, and the twelfth gear 112 rotate.
  • a second rotation shaft 142 is fixed to the tenth gear 110, and the second rotation shaft 142 rotates integrally with the tenth gear 110.
  • a third rotating shaft 143 is fixed to the twelfth gear 112, and the third rotating shaft 143 rotates integrally with the twelfth gear 112. Accordingly, the second driving roller 322a attached to the second rotating shaft 142 and the third driving roller 323a attached to the third rotating shaft 143 rotate to transport the document D.
  • the driving force output from the second gear 102 is transmitted to the eighth gear 108 provided in the clutch 132 via the sixth gear 106 and the seventh gear 107. Accordingly, when the clutch 132 is turned ON, the fifth rotating shaft 145 fixed to the eighth gear 108 rotates integrally with the eighth gear 108. As a result, the paper feed roller 312a rotates. When the clutch 132 is turned off, the transmission of the driving force to the fifth rotating shaft 145 is released, and the rotation of the fifth rotating shaft 145 is stopped. Thereby, the rotation of the paper feed roller 312a is stopped.
  • FIGS. 4 (a) and 4 (b) are views of the output gear 100, the first gear 101, and the second gear 102
  • FIG. 4B is a cross-sectional view of the output gear 100, the first gear 101, and the second gear 102. is there.
  • the first gear 101 and the second gear 102 are arranged coaxially with the output gear 100 and constitute a three-stage gear together with the output gear 100. Further, as shown in FIG. 4B, a part of the first gear 101 is fitted and fixed to a recess formed on one surface 100 a of the output gear 100, and the other surface of the output gear 100. Part of the second gear 102 is fitted and fixed in the recess formed in 100b. Therefore, when the output gear 100 rotates, the first gear 101 and the second gear 102 rotate together with the output gear 100.
  • the output gear 100 is a gear to which driving force is directly transmitted from the motor gear 131a. For this reason, the output gear 100 can stabilize the rotation of the first gear 101 and the second gear 102. That is, the output gear 100 can act as a flywheel for the first gear 101 and the second gear 102. Therefore, the sheet conveying apparatus 10 can stably rotate the first gear 101 and the second gear 102 without using a separate flywheel. As a result, the sheet conveying apparatus 10 has the first driving roller 321a, the second driving roller 322a, and the third driving roller to which the driving force is transmitted via the first gear 101 even when the clutch 132 is repeatedly turned on and off. 323a and the discharge drive roller 331a can be rotated stably. Therefore, the sheet conveying apparatus 10 can stabilize the document conveyance speed, and can reduce the occurrence of blurring and color misregistration of the read image of the document.
  • the sixth gear 106 and the third gear 103 which are intermediate gears, are arranged coaxially, so that the number of members (for example, pins) that support the gear can be reduced.
  • the impact relaxation material 133 may be provided between the output gear 100 and the 1st gear 101, and between the output gear 100 and the 2nd gear 102.
  • FIG. FIG. 4C is a cross-sectional view showing another example of the output gear 100, the first gear 101, and the second gear 102.
  • the impact relaxation material 133 may be provided in the concave portion of the output gear 100 shown in FIG. Thereby, the transmission of the impact from the clutch 132 to the first roller 121 is reduced. That is, an impact is generated when the clutch 132 is switched between ON and OFF. The impact is transmitted to the second gear 102. The impact transmitted to the second gear 102 is transmitted to the output gear 100 and the first gear 101.
  • the impact transmitted to the first gear 101 is transmitted to a plurality of first rollers 121 (a first drive roller 321a, a second drive roller 322a, a third drive roller 323a, and a discharge drive roller 331a).
  • first rollers 121 a first drive roller 321a, a second drive roller 322a, a third drive roller 323a, and a discharge drive roller 331a.
  • An elastic member such as rubber can be used for the impact relaxation material 133.
  • FIG. 5 is a flowchart showing the operation of the sheet conveying apparatus 10. As shown in FIG. 5, the sheet conveying apparatus 10 conveys the document D along the conveying path 340 by executing steps S ⁇ b> 502 to S ⁇ b> 508.
  • Step S502 The motor 131 is driven. As a result, the driving force is transmitted from the motor 131 to the output gear 100, and the first gear 101 and the second gear 102 arranged coaxially with the output gear 100 rotate. As a result, the first roller 121 (the first drive roller 321a, the second drive roller 322a, the third drive roller 323a, and the discharge drive roller 331a) rotates.
  • Step S504 The clutch 132 is turned on. Accordingly, the driving force transmitted from the second gear 102 to the eighth gear 108 is transmitted to the second roller 122 (paper feed roller 312a), and the second roller 122 (paper feed roller 312a) rotates.
  • Step S506 When the rear end of the document D is detected by the first document detection sensor provided downstream of the paper feed roller group 312, the clutch 132 is turned off. Thereby, rotation of the 2nd roller 122 (paper feed roller 312a) stops.
  • Step S507 The second document detection sensor detects whether or not the document D is placed on the document tray 311.
  • the second document detection sensor is installed inside the housing 301 in the vicinity of the paper feed port 301F.
  • the second document detection sensor scans the document D until all the documents D are fed from the document tray 311 to the transport path 340. Detect. If the second document detection sensor detects that the document D is placed on the document tray 311 (step S507: Yes), the process returns to step S504.
  • step S 504 to S 506 are repeated, whereby the clutch 132 is repeatedly turned ON and OFF, and a plurality of documents placed on the document tray 311 are placed.
  • Originals D are conveyed along the conveyance path 340 one by one. If the second document detection sensor detects that the document D is not placed on the document tray 311 (step S507: No), the process proceeds to step S508.
  • Step S508 The motor 131 stops.
  • FIG. 6 is a schematic diagram illustrating a configuration of the image forming apparatus.
  • the image forming apparatus 1 is a copying machine and includes a main body 20 and an automatic document feeder 30. Further, the image forming apparatus 1 includes a document reading unit 210, a paper feeding unit 220, an image forming unit 240, a transfer device 250, a fixing device 260, a discharge unit 270, a manual feed tray 281, and a control unit 290. And a transport unit L.
  • the automatic document feeder 30 is installed on the upper part of the main body 20 of the image forming apparatus 1. As described with reference to FIG. 1, the automatic document feeder 30 conveys a plurality of documents D placed on the document tray 311 one by one along the conveyance path 340. The automatic document feeder 30 reads an image of the document D in the course of transporting the document D, and generates image data.
  • the automatic document feeder 30 is attached to the main body 20 so as to be openable and closable. When the automatic document feeder 30 is opened, the document table 211 provided on the upper surface of the main body 20 is exposed. When the document D is placed on the document table 211, the image forming apparatus 1 reads an image of the document D by the document reading unit 210 provided in the main body 20, and generates image data.
  • the paper feeding unit 220 is disposed at the lower part of the main body 20.
  • the paper feeding unit 220 stores a plurality of papers P and feeds the papers P one by one to the transport unit L.
  • the transport unit L includes a first transport unit L1, a second transport unit L2, a third transport unit L3, and a fourth transport unit L4.
  • the first transport unit L1 transports the paper P fed by the paper feed unit 220 to the fixing device 260 via the image forming unit 240.
  • the first transport unit L1 includes an eleventh drive roller 11a and a registration roller pair 12.
  • the eleventh drive roller 11a is arranged downstream of the junction of the first transport unit L1 and the fourth transport unit L4 with respect to the transport direction of the paper P.
  • the eleventh drive roller 11 a conveys the paper P toward the registration roller pair 12.
  • the registration roller pair 12 includes a driving registration roller 12a and a driven registration roller 12b in contact with the driving registration roller 12a.
  • the driving registration roller 12a rotates by receiving a driving force
  • the driven registration roller 12b rotates according to the rotation of the driving registration roller 12a.
  • the paper P sent from the eleventh driving roller 11a comes into contact with the stopped registration roller pair 12. Thereby, the skew correction of the paper P is performed.
  • the registration roller pair 12 temporarily waits for the paper P in order to synchronize the transfer timing of the toner image by the transfer device 250 and the conveyance of the paper P, and then directs the paper P to the fixing device 260 in accordance with the transfer timing. Transport.
  • the second transport unit L2 transports the paper P transported from the fixing device 260 toward the third transport unit L3 or the discharge unit 270.
  • the third transport unit L3 is used when images are formed on both sides of the paper P.
  • the fourth transport unit L4 is used when an image is formed on the paper P placed on the manual feed tray 281.
  • the fourth transport unit L4 transports the paper P fed from the manual feed tray 281 to the first transport unit L1.
  • the fourth transport unit L4 includes a fourteenth transport roller pair 14.
  • the fourteenth transport roller pair 14 includes a fourteenth drive roller 14a and a fourteenth driven roller 14b in contact with the fourteenth drive roller 14a.
  • the fourteenth driving roller 14a rotates when the driving force is transmitted, and the fourteenth driven roller 14b rotates according to the rotation of the fourteenth driving roller 14a.
  • the paper P fed from the manual feed tray 281 is sandwiched between the fourteenth drive roller 14a and the fourteenth driven roller 14b and conveyed toward the first conveyance unit L1.
  • the image forming unit 240 forms a toner image based on the image data generated by the reading device 350.
  • the image forming unit 240 includes an exposure device 241, a plurality of photosensitive drums 242, and a plurality of developing rollers 243. Each of the plurality of developing rollers 243 is disposed corresponding to each photosensitive drum 242.
  • the exposure device 241 irradiates each photoconductor drum 242 with laser light based on the image data to form an electrostatic latent image.
  • Each developing roller 243 supplies toner to the corresponding photosensitive drum 242 to develop the electrostatic latent image. As a result, a toner image is formed on each photosensitive drum 242.
  • the transfer device 250 includes a primary transfer roller 251, a secondary transfer roller 252, a driven roller 253, and an intermediate transfer belt 254.
  • the transfer device 250 transfers the toner images formed on the respective photosensitive drums 242 so as to overlap the paper P.
  • the primary transfer roller 251 is disposed to face the photosensitive drum 242 with the intermediate transfer belt 254 interposed therebetween.
  • the intermediate transfer belt 254 is pressed against the photosensitive drum 242 by the primary transfer roller 251. As a result, the toner image is transferred from the surface of the photosensitive drum 242 to the intermediate transfer belt 254.
  • the secondary transfer roller 252 and the driven roller 253 press each other to form a nip portion.
  • the secondary transfer roller 252 and the driven roller 253 transfer the toner image on the intermediate transfer belt 254 to the paper P when the paper P passes through the nip portion.
  • the fixing device 260 fixes the unfixed toner image transferred by the transfer device 250 onto the paper P by heating and pressurizing the paper P with the fixing member 261 and the pressure member 262.
  • the discharge unit 270 discharges the paper P on which the toner image is fixed to the outside of the apparatus.
  • the manual feed tray 281 can place a plurality of sheets of paper P.
  • the manual paper feed roller 282 feeds the paper P placed on the manual tray 281 one by one and transports it toward the fourteenth transport roller pair 14.
  • the control unit 290 has a storage area.
  • the storage area stores programs, setting information, and the like.
  • the storage area includes a RAM (Random Access Memory) and a ROM (Read Only Memory).
  • the control unit 290 controls the overall operation of the image forming apparatus 1 by executing various control programs stored in advance in the ROM.
  • the image forming apparatus 1 is not limited to a copying machine, and is, for example, a facsimile machine or a multifunction machine having these functions. obtain.
  • the sheet conveying apparatus 10 is applied to the automatic document conveying apparatus 30 and the image forming apparatus 1 has been described.
  • the apparatus to which the sheet conveying apparatus 10 is applied is not limited thereto.
  • the sheet conveying apparatus 10 can be applied to a scanner.
  • the sheet conveying apparatus 10 is applied to the automatic document conveying apparatus 30
  • the sheet conveying apparatus 10 is applied to the manual feed roller 282 and the fourteenth driving roller 14a.
  • the first roller 121 may be used as the fourteenth drive roller 14a
  • the second roller 122 may be used as the manual paper feed roller 282.
  • the manual feed roller 282 is repeatedly rotated and stopped when the clutch 132 of the sheet conveying apparatus 10 is repeatedly turned on and off.
  • the fourteenth drive roller 14a conveys the paper P fed by the manual paper feed roller 282 toward the first conveyance unit L1.
  • the sheet conveying apparatus 10 may be applied to the eleventh driving roller 11a and the driving registration roller 12a.
  • the first roller 121 may be used as the eleventh driving roller 11a
  • the second roller 122 may be used as the driving registration roller 12a.
  • the eleventh drive roller 11 a conveys the fed paper P toward the registration roller pair 12.
  • the clutch 132 of the sheet conveying apparatus 10 is turned on, the driving registration roller 12a is rotated, and when the clutch 132 is turned off, the rotation of the driving registration roller 12a is stopped. Therefore, the paper P can be conveyed toward the fixing device 260 (nip portion) in accordance with the transfer timing.
  • the number of the motors 131 is one, but the number of the motors 131 may be two or more.
  • the number of output gears 100 is one, but the number of output gears 100 may vary depending on the number of motor gears 131a.
  • the impact relaxation material 133 is provided in the concave portion of the output gear 100 in the concave portion of the output gear 100 in the embodiment of the present invention.
  • the impact relaxation material 133 is provided between the output gear 100 and the first gear 101 and between the output gear 100 and the output gear 100.
  • 100 and the second gear 102 are only required to be disposed, and the place where the shock absorbing material 133 is disposed is not limited to the concave portion of the output gear 100.
  • the impact relaxation material 133 may be disposed between the output gear 100 and the first gear 101 and between the output gear 100 and the second gear 102.
  • the output gear 100 is disposed between the first gear 101 and the second gear 102 .
  • the position where the output gear 100 is disposed is the same as that of the first gear 101. It is not limited between the second gear 102.
  • the number of conveyance roller pairs (first conveyance roller pair 321, second conveyance roller pair 322, and third conveyance roller pair 323) included in the automatic document conveyance device 30 is three.
  • the number of conveyance roller pairs provided in the automatic document conveyance device 30 may be 1 to 2, 4 or more.
  • first rotation shaft 141, the second rotation shaft 142, the third rotation shaft 143, and the fourth rotation shaft 144 of the sheet conveying apparatus 10 are rotatably supported by rollers (first driving rollers).
  • first driving rollers 321a, second driving roller 322a, third driving roller 323a, and discharge driving roller 331a) are two, but the first rotating shaft 141, the second rotating shaft 142, the third rotating shaft 143, and the fourth rotating shaft.
  • the number of rollers 144 that each 144 rotatably supports may be one or three or more.
  • the number of rollers (paper feed roller 312a) that the fifth rotation shaft 145 of the sheet conveying apparatus 10 supports rotatably is one, but the fifth rotation shaft 145 can rotate.
  • the number of rollers (paper feed rollers 312a) to support may be two or more.
  • the present invention is applied to an electrophotographic image forming apparatus.
  • the present invention can also be applied to, for example, an inkjet image forming apparatus.
  • the recording medium is the paper P
  • the recording medium may be other than the paper P (for example, a resin sheet or fabric).

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  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

Abstract

This sheet feeding device (10) is provided with a first roller (121), a second roller (122), a drive source (131), an output gear (100), a first gear (101), a second gear (102), and a clutch (132). The first roller (121) is a member for feeding a sheet. The second roller (122) is a member for feeding a sheet. The drive source (131) generates a driving force. The output gear (100) rotates on the basis of the driving force transmitted from the drive source (131). The first gear (101) is disposed on a common axis with the output gear (100) and rotates along with the output gear (100) to transmit the driving force toward the first roller (121). The second gear (102) is disposed on a common axis with the output gear (100) and rotates along with the output gear (100) to transmit the driving force toward the second roller (122). The clutch (132) switches between transmission of the driving force to the second roller (122) and release of said transmission.

Description

シート搬送装置、自動原稿搬送装置、画像形成装置、及びシート搬送方法Sheet conveying apparatus, automatic document conveying apparatus, image forming apparatus, and sheet conveying method
　本発明は、シート搬送装置、自動原稿搬送装置、画像形成装置、及びシート搬送方法に関する。 The present invention relates to a sheet conveying apparatus, an automatic document conveying apparatus, an image forming apparatus, and a sheet conveying method.
　近年、コピー機、複合機などの画像形成装置には、その本体部の上面に自動原稿搬送装置（ＡＤＦ：ＡｕｔｏＤｏｃｕｍｅｎｔＦｅｅｄｅｒ）が装備されていることが多い。自動原稿搬送装置は、画像形成装置本体部に設けられた原稿読取部の上、又は当該自動原稿搬送装置自身に設けられた原稿読取部の上を通過するように原稿を搬送する。このような自動原稿搬送装置は、原稿を搬送するためのシート搬送装置を備えている。 In recent years, image forming apparatuses such as copiers and multifunction machines are often equipped with an automatic document feeder (ADF) on the upper surface of the main body. The automatic document feeder conveys a document so as to pass over a document reading unit provided in the main body of the image forming apparatus or a document reading unit provided in the automatic document feeder itself. Such an automatic document conveying device includes a sheet conveying device for conveying an original.
　シート搬送装置は、モーターなどの駆動源から駆動力が伝達されて回転する複数のローラーを用いて原稿を搬送する。複数のローラーは、原稿トレイから搬送路へ原稿を給紙する給紙ローラー、搬送路に沿って原稿を搬送する複数の搬送ローラー、及び原稿を搬送路から排出トレイへ排出する排出ローラーを含む。給紙ローラーは、一般的に、クラッチを介して駆動力が伝達される。一方、複数の搬送ローラー及び排出ローラーは、クラッチを介さずに駆動力が伝達される。クラッチは、複数の原稿を連続して給紙する際にＯＮとＯＦＦとを繰り返す。これにより、給紙ローラーの回転及びその回転の停止が繰り返されて、原稿が１枚ずつ搬送路に給紙される。 The sheet conveying device conveys a document using a plurality of rollers that rotate by a driving force transmitted from a driving source such as a motor. The plurality of rollers includes a paper feed roller that feeds the document from the document tray to the transport path, a plurality of transport rollers that transport the document along the transport path, and a discharge roller that discharges the document from the transport path to the discharge tray. Generally, the driving force is transmitted to the sheet feed roller via a clutch. On the other hand, the driving force is transmitted to the plurality of transport rollers and the discharge rollers without passing through the clutch. The clutch repeats ON and OFF when feeding a plurality of documents continuously. Accordingly, the rotation of the paper feed roller and the stop of the rotation are repeated, and the originals are fed one by one to the conveyance path.
　しかし、クラッチがＯＮとＯＦＦとを繰り返すと、複数の搬送ローラー及び排出ローラーへ、クラッチのＯＮとＯＦＦとに起因する衝撃が伝わる。このため、複数の原稿を連続して搬送する際に、複数の搬送ローラー及び排出ローラーが安定して回転できないおそれがある。複数の搬送ローラー及び排出ローラーの回転が不安定になると、原稿の搬送速度が変化して、原稿の読み取り画像のブレや色ずれが発生するおそれがある。 However, when the clutch is repeatedly turned ON and OFF, the impact due to the ON and OFF of the clutch is transmitted to the plurality of transport rollers and the discharge rollers. For this reason, when a plurality of documents are continuously conveyed, the plurality of conveyance rollers and the discharge roller may not be able to rotate stably. If the rotation of the plurality of transport rollers and the discharge rollers becomes unstable, the transport speed of the document may change, and the read image of the document may be blurred or misregistrated.
　ところで、特許文献１には、レジストローラーの回転軸にフライホイールを設け、レジストローラーの回転を安定させる構成が記載されている。 By the way, Patent Document 1 describes a configuration in which a rotation wheel of a registration roller is provided with a flywheel to stabilize the rotation of the registration roller.
特開２００３－１４６４８７号公報JP 2003-146487 A
　しかし、特許文献１に記載の構成では、レジストローラーを安定して回転させるために、別途、フライホイールを設ける必要があり、装置の大型化を招く。 However, in the configuration described in Patent Document 1, it is necessary to provide a separate flywheel in order to stably rotate the registration roller, resulting in an increase in the size of the apparatus.
　本発明は上記課題に鑑みてなされたものであり、フライホイールを用いることなく、ローラーを安定して回転させることができるシート搬送装置、自動原稿搬送装置、画像形成装置、及びシート搬送方法を提供することを目的とする。 The present invention has been made in view of the above problems, and provides a sheet conveying apparatus, an automatic document conveying apparatus, an image forming apparatus, and a sheet conveying method capable of stably rotating a roller without using a flywheel. The purpose is to do.
　本発明に係るシート搬送装置は、第１ローラーと第２ローラーと駆動源と出力ギアと第１ギアと第２ギアとクラッチとを備える。前記第１ローラーは、シートを搬送するための部材である。前記第２ローラーは、シートを搬送するための部材である。前記駆動源は、駆動力を発生させる。前記出力ギアは、前記駆動源から伝達された駆動力に基づいて回転する。前記第１ギアは、前記出力ギアと同軸上に配置され、前記出力ギアと共に回転して前記第１ローラーへ向けて駆動力を伝達する。前記第２ギアは、前記出力ギアと同軸上に配置され、前記出力ギアと共に回転して前記第２ローラーへ向けて駆動力を伝達する。前記クラッチは、前記第２ローラーへの駆動力の伝達とその伝達の解除を切り替える。 The sheet conveying apparatus according to the present invention includes a first roller, a second roller, a drive source, an output gear, a first gear, a second gear, and a clutch. The first roller is a member for conveying a sheet. The second roller is a member for conveying the sheet. The driving source generates a driving force. The output gear rotates based on the driving force transmitted from the driving source. The first gear is disposed coaxially with the output gear, and rotates with the output gear to transmit a driving force toward the first roller. The second gear is disposed coaxially with the output gear, and rotates with the output gear to transmit a driving force toward the second roller. The clutch switches between transmission of driving force to the second roller and release of the transmission.
　本発明に係る自動原稿搬送装置は、原稿トレイと上記のシート搬送装置とを備える。前記原稿トレイには、原稿が載置される。前記シート搬送装置の第１ローラーは、前記原稿を搬送路に沿って搬送する搬送ローラーである。前記シート搬送装置の第２ローラーは、前記原稿を前記原稿トレイから前記搬送路に給紙する給紙ローラーである。 An automatic document conveying device according to the present invention includes a document tray and the sheet conveying device described above. A document is placed on the document tray. The first roller of the sheet conveying apparatus is a conveying roller that conveys the document along a conveying path. The second roller of the sheet conveying device is a paper feeding roller that feeds the original from the original tray to the conveying path.
　本発明に係る画像形成装置は、上記の自動原稿搬送装置と画像形成部とを備える。 An image forming apparatus according to the present invention includes the automatic document feeder and the image forming unit.
　本発明に係る他の画像形成装置は、手差しトレイと上記のシート搬送装置とを備える。前記手差しトレイには、被記録媒体が載置される。前記シート搬送装置の第１ローラーは、前記被記録媒体を搬送路に沿って搬送する搬送ローラーである。前記シート搬送装置の第２ローラーは、前記被記録媒体を前記手差しトレイから前記搬送路へ給紙する給紙ローラーである。 Another image forming apparatus according to the present invention includes a manual feed tray and the sheet conveying device. A recording medium is placed on the manual feed tray. The first roller of the sheet conveying apparatus is a conveying roller that conveys the recording medium along a conveying path. The second roller of the sheet conveying device is a paper feeding roller that feeds the recording medium from the manual feed tray to the conveying path.
　本発明に係る更に他の画像形成装置は、被記録媒体にトナー像を転写させて画像を形成する。当該画像形成装置は、転写装置と上記に記載のシート搬送装置とを備える。前記転写装置は、前記被記録媒体にトナー像を転写させる。前記シート搬送装置の第１ローラーは、前記被記録媒体を搬送路に沿って搬送する搬送ローラーである。前記シート搬送装置の第２ローラーは、前記転写装置へ前記被記録媒体を送るレジストローラーである。 Still another image forming apparatus according to the present invention forms an image by transferring a toner image to a recording medium. The image forming apparatus includes a transfer device and the sheet conveying device described above. The transfer device transfers a toner image onto the recording medium. The first roller of the sheet conveying apparatus is a conveying roller that conveys the recording medium along a conveying path. The second roller of the sheet conveying device is a registration roller that sends the recording medium to the transfer device.
　本発明に係るシート搬送方法は、前記第１ローラー及び前記第２ローラーが回転してシートが搬送される。本発明に係るシート搬送方法は、駆動源を駆動させて、前記駆動源から出力ギアに駆動力を伝達することにより、前記出力ギアと同軸上に配置された第１ギア及び第２ギアを回転させて、第１ローラーを回転させることと、クラッチをＯＮにして前記第２ギアから第２ローラーへ駆動力を伝達させて、前記第２ローラーを回転させることとを含む。 In the sheet conveying method according to the present invention, the first roller and the second roller rotate to convey the sheet. The sheet conveying method according to the present invention rotates a first gear and a second gear arranged coaxially with the output gear by driving a driving source and transmitting driving force from the driving source to the output gear. And rotating the first roller and turning on the clutch to transmit the driving force from the second gear to the second roller to rotate the second roller.
　本発明によれば、フライホイールを用いることなく、ローラーを安定して回転させることができる。 According to the present invention, the roller can be stably rotated without using a flywheel.
本発明の実施形態１に係る自動原稿搬送装置の要部を示す模式図である。FIG. 2 is a schematic diagram illustrating a main part of the automatic document feeder according to the first embodiment of the present invention. 本発明の実施形態１に係るシート搬送装置の要部を示す斜視図である。It is a perspective view which shows the principal part of the sheet conveying apparatus which concerns on Embodiment 1 of this invention. 本発明の実施形態１に係るシート搬送装置の一部を拡大して示す斜視図である。It is a perspective view which expands and shows a part of sheet conveying device concerning Embodiment 1 of the present invention. 本発明の実施形態１に係るシート搬送装置の出力ギア、第１ギア、第２ギアを示す模式図である。It is a schematic diagram which shows the output gear of the sheet conveying apparatus which concerns on Embodiment 1 of this invention, a 1st gear, and a 2nd gear. 本発明の実施形態１に係るシート搬送装置の動作を示すフローチャートである。3 is a flowchart illustrating an operation of the sheet conveying apparatus according to the first exemplary embodiment of the present invention. 本発明の実施形態２に係る画像形成装置の構成を示す模式図である。It is a schematic diagram which shows the structure of the image forming apparatus which concerns on Embodiment 2 of this invention.
　以下、図面を参照して本発明に係るシート搬送装置、自動原稿搬送装置、画像形成装置及びシート搬送方法の実施形態を説明する。なお、図中、同一又は相当部分については同一の参照符号を付して説明を繰り返さない。 Hereinafter, embodiments of a sheet conveying apparatus, an automatic document conveying apparatus, an image forming apparatus, and a sheet conveying method according to the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.
［実施形態１］
　まず、図１を参照して、本発明の実施形態１に係る自動原稿搬送装置を説明する。図１は、自動原稿搬送装置の要部を示す模式図である。 [Embodiment 1]
First, an automatic document feeder according to Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 is a schematic diagram showing a main part of an automatic document feeder.
　図１に示すように、自動原稿搬送装置３０は、筐体３０１と、原稿トレイ３１１と、排出トレイ３３２と、搬送路３４０と、読取装置３５０とを備える。更に、自動原稿搬送装置３０は、給紙ローラー群３１２と、複数（ここでは３つ）の搬送ローラー対３２１、３２２及び３２３と、排出ローラー対３３１とを備える。 As shown in FIG. 1, the automatic document feeder 30 includes a casing 301, a document tray 311, a discharge tray 332, a conveyance path 340, and a reading device 350. The automatic document feeder 30 further includes a paper feed roller group 312, a plurality (three in this case) of transport roller pairs 321, 322, and 323, and a discharge roller pair 331.
　筐体３０１には給紙口３０１Ｆが形成されており、原稿トレイ３１１は、給紙口３０１Ｆに対応して筐体３０１に取り付けられている。また、給紙口３０１Ｆ近傍の筐体３０１内部には、給紙ローラー群３１２が配置される。自動原稿搬送装置３０に原稿Ｄの読取開始の指示が入力されると、給紙ローラー群３１２は、原稿トレイ３１１に載置された原稿Ｄを搬送路３４０へ給紙する。 A paper feed port 301F is formed in the housing 301, and the document tray 311 is attached to the housing 301 corresponding to the paper feed port 301F. In addition, a paper feed roller group 312 is disposed inside the housing 301 near the paper feed port 301F. When an instruction to start reading the document D is input to the automatic document feeder 30, the paper feed roller group 312 feeds the document D placed on the document tray 311 to the transport path 340.
　原稿トレイ３１１には、複数の原稿Ｄを載置することができる。複数の原稿Ｄが原稿トレイ３１１に載置された場合、給紙ローラー群３１２は、回転及びその回転の停止を繰り返し、原稿トレイ３１１から搬送路３４０へ原稿Ｄを１枚ずつ給紙する。詳しくは、給紙ローラー群３１２が、回転及びその回転の停止を繰り返すことにより、ある原稿Ｄが搬送路３４０に沿って搬送されている最中に、その搬送中の原稿Ｄとは異なる原稿Ｄが搬送路３４０へ給紙される。 A plurality of documents D can be placed on the document tray 311. When a plurality of documents D are placed on the document tray 311, the paper feed roller group 312 repeatedly rotates and stops the rotation, and feeds the documents D from the document tray 311 to the transport path 340 one by one. Specifically, the paper feed roller group 312 repeats rotation and stop of the rotation, so that a document D different from the document D being transported while a document D is being transported along the transport path 340. Is fed to the transport path 340.
　給紙ローラー群３１２は、給紙ローラー３１２ａとピックアップローラー３１２ｂとを含み、略Ｕ字形状を有する搬送路３４０の外周側に配置されている。給紙ローラー３１２ａは駆動力が伝達される駆動ローラーであり、ピックアップローラー３１２ｂは給紙ローラー３１２ａの回転に応じて回転する従動ローラーである。ピックアップローラー３１２ｂは、給紙ローラー３１２ａよりも搬送路３４０の上流側に配置される。 The paper feed roller group 312 includes a paper feed roller 312a and a pickup roller 312b, and is disposed on the outer peripheral side of the conveyance path 340 having a substantially U shape. The sheet feeding roller 312a is a driving roller to which driving force is transmitted, and the pickup roller 312b is a driven roller that rotates in accordance with the rotation of the sheet feeding roller 312a. The pickup roller 312b is disposed on the upstream side of the transport path 340 with respect to the paper feed roller 312a.
　搬送路３４０は、給紙口３０１Ｆから、筐体３０１に形成された排出口３０１Ｈまで延在しており、給紙ローラー群３１２よりも搬送路３４０の下流側に第１搬送ローラー対３２１、第２搬送ローラー対３２２、第３搬送ローラー対３２３及び排出ローラー対３３１がこの順に搬送路３４０に沿って配置される。 The conveyance path 340 extends from the paper feed opening 301 </ b> F to the discharge outlet 301 </ b> H formed in the housing 301. The two transport roller pairs 322, the third transport roller pair 323, and the discharge roller pair 331 are arranged along the transport path 340 in this order.
　第１搬送ローラー対３２１は、第１駆動ローラー３２１ａと、第１駆動ローラー３２１ａに当接された第１従動ローラー３２１ｂとを含む。第１駆動ローラー３２１ａは略Ｕ字形状を有する搬送路３４０の内周側に配置され、第１従動ローラー３２１ｂは搬送路３４０の外周側に配置される。第１駆動ローラー３２１ａは駆動力が伝達されると回転し、第１従動ローラー３２１ｂは第１駆動ローラー３２１ａの回転に応じて回転する。原稿Ｄは、第１駆動ローラー３２１ａ及び第１従動ローラー３２１ｂに挟まれて、第２搬送ローラー対３２２へ向けて搬送される。 The first transport roller pair 321 includes a first drive roller 321a and a first driven roller 321b in contact with the first drive roller 321a. The first drive roller 321 a is disposed on the inner peripheral side of the conveyance path 340 having a substantially U shape, and the first driven roller 321 b is disposed on the outer peripheral side of the conveyance path 340. The first driving roller 321a rotates when the driving force is transmitted, and the first driven roller 321b rotates according to the rotation of the first driving roller 321a. The document D is sandwiched between the first drive roller 321 a and the first driven roller 321 b and is transported toward the second transport roller pair 322.
　第２搬送ローラー対３２２は、第２駆動ローラー３２２ａと、第２駆動ローラー３２２ａに当接された第２従動ローラー３２２ｂとを含む。第２駆動ローラー３２２ａは略Ｕ字形状を有する搬送路３４０の内周側に配置され、第２従動ローラー３２２ｂは搬送路３４０の外周側に配置される。第２駆動ローラー３２２ａは駆動力が伝達されると回転し、第２従動ローラー３２２ｂは第２駆動ローラー３２２ａの回転に応じて回転する。原稿Ｄは、第２駆動ローラー３２２ａ及び第２従動ローラー３２２ｂに挟まれて、第３搬送ローラー対３２３へ向けて搬送される。 The second transport roller pair 322 includes a second drive roller 322a and a second driven roller 322b in contact with the second drive roller 322a. The second drive roller 322 a is disposed on the inner peripheral side of the conveyance path 340 having a substantially U shape, and the second driven roller 322 b is disposed on the outer peripheral side of the conveyance path 340. The second driving roller 322a rotates when the driving force is transmitted, and the second driven roller 322b rotates according to the rotation of the second driving roller 322a. The document D is sandwiched between the second drive roller 322 a and the second driven roller 322 b and is transported toward the third transport roller pair 323.
　第３搬送ローラー対３２３は、第３駆動ローラー３２３ａと、第３駆動ローラー３２３ａに当接された第３従動ローラー３２３ｂとを含む。第３駆動ローラー３２３ａは略Ｕ字形状を有する搬送路３４０の内周側に配置され、第３従動ローラー３２３ｂは搬送路３４０の外周側に配置される。第３駆動ローラー３２３ａは駆動力が伝達されると回転し、第３従動ローラー３２３ｂは第３駆動ローラー３２３ａの回転に応じて回転する。原稿Ｄは、第３駆動ローラー３２３ａ及び第３従動ローラー３２３ｂに挟まれて、排出ローラー対３３１へ向けて搬送される。 The third transport roller pair 323 includes a third drive roller 323a and a third driven roller 323b in contact with the third drive roller 323a. The third drive roller 323 a is disposed on the inner peripheral side of the conveyance path 340 having a substantially U shape, and the third driven roller 323 b is disposed on the outer peripheral side of the conveyance path 340. The third driving roller 323a rotates when the driving force is transmitted, and the third driven roller 323b rotates according to the rotation of the third driving roller 323a. The document D is sandwiched between the third driving roller 323 a and the third driven roller 323 b and is conveyed toward the discharge roller pair 331.
　排出ローラー対３３１は、排出駆動ローラー３３１ａと、排出駆動ローラー３３１ａに当接された排出従動ローラー３３１ｂとを含む。排出駆動ローラー３３１ａは略Ｕ字形状を有する搬送路３４０の内周側に配置され、排出従動ローラー３３１ｂは搬送路３４０の外周側に配置される。排出駆動ローラー３３１ａは駆動力が伝達されると回転し、排出従動ローラー３３１ｂは排出駆動ローラー３３１ａの回転に応じて回転する。原稿Ｄは、排出駆動ローラー３３１ａ及び排出従動ローラー３３１ｂに挟まれて、排出口３０１Ｈへ送られる。 The discharge roller pair 331 includes a discharge drive roller 331a and a discharge driven roller 331b in contact with the discharge drive roller 331a. The discharge driving roller 331a is disposed on the inner peripheral side of the conveyance path 340 having a substantially U shape, and the discharge driven roller 331b is disposed on the outer peripheral side of the conveyance path 340. When the driving force is transmitted, the discharge driving roller 331a rotates, and the discharge driven roller 331b rotates according to the rotation of the discharge driving roller 331a. The document D is sandwiched between the discharge driving roller 331a and the discharge driven roller 331b and sent to the discharge port 301H.
　排出トレイ３３２は、筐体３０１の上面に形成されており、排出口３０１Ｈから排出トレイ３３２へ原稿Ｄが排出される。 The discharge tray 332 is formed on the upper surface of the housing 301, and the document D is discharged from the discharge port 301H to the discharge tray 332.
　読取装置３５０は、第１駆動ローラー３２１ａ及び第２駆動ローラー３２２ａの間に配置される。読取装置３５０は、搬送路３４０を搬送された原稿Ｄの画像を読み取り、画像データを生成する。 The reading device 350 is disposed between the first drive roller 321a and the second drive roller 322a. The reading device 350 reads an image of the document D transported through the transport path 340 and generates image data.
　次に、図２～図４を参照して、自動原稿搬送装置３０が備えるシート搬送装置について説明する。図２は、シート搬送装置の要部を示す斜視図である。 Next, the sheet conveying apparatus provided in the automatic document conveying apparatus 30 will be described with reference to FIGS. FIG. 2 is a perspective view illustrating a main part of the sheet conveying apparatus.
　図２に示すように、シート搬送装置１０は、駆動源であるモーター１３１を備える。モーター１３１は、支持板１３０の背面側に設けられている。モーター１３１から発生した駆動力は、支持板１３０の正面側に設けられたギア群を介して、第１回転軸１４１～第５回転軸１４５のそれぞれに伝達される。 As shown in FIG. 2, the sheet conveying apparatus 10 includes a motor 131 that is a drive source. The motor 131 is provided on the back side of the support plate 130. The driving force generated from the motor 131 is transmitted to each of the first rotating shaft 141 to the fifth rotating shaft 145 via a gear group provided on the front side of the support plate 130.
　第１回転軸１４１～第５回転軸１４５のうち、第１回転軸１４１～第４回転軸１４４のそれぞれには、複数の第１ローラー１２１が軸着されている。モーター１３１から駆動力が伝達されて第１回転軸１４１～第４回転軸１４４のそれぞれが回転する。これにより、各第１ローラー１２１が回転する。 Among the first rotating shaft 141 to the fifth rotating shaft 145, each of the first rotating shaft 141 to the fourth rotating shaft 144 has a plurality of first rollers 121 attached thereto. A driving force is transmitted from the motor 131 to rotate each of the first to fourth rotating shafts 141 to 144. Thereby, each 1st roller 121 rotates.
　同様に、第５回転軸１４５には第２ローラー１２２が軸着しており、モーター１３１から駆動力が伝達されて第５回転軸１４５が回転する。これにより、第２ローラー１２２が回転する。 Similarly, the second roller 122 is attached to the fifth rotating shaft 145, and the driving force is transmitted from the motor 131 to rotate the fifth rotating shaft 145. Thereby, the 2nd roller 122 rotates.
　本実施形態では、図１に示した第１駆動ローラー３２１ａ、第２駆動ローラー３２２ａ、第３駆動ローラー３２３ａ及び排出駆動ローラー３３１ａが第１ローラー１２１に該当し、給紙ローラー３１２ａが第２ローラー１２２に該当する。 In the present embodiment, the first drive roller 321a, the second drive roller 322a, the third drive roller 323a, and the discharge drive roller 331a illustrated in FIG. It corresponds to.
　続いて、図３を参照して、シート搬送装置１０が備えるギア群について詳細に説明する。図３は、シート搬送装置１０の一部を拡大して示す斜視図である。 Subsequently, the gear group included in the sheet conveying apparatus 10 will be described in detail with reference to FIG. FIG. 3 is an enlarged perspective view showing a part of the sheet conveying apparatus 10.
　モーター１３１の出力軸は、支持板１３０の正面側に突出しており、その出力軸の先端には、モーターギア１３１ａが取り付けられている。モーターギア１３１ａは、出力ギア１００と歯合する。支持板１３０の正面に設けられたギア群を構成する各ギアは、出力ギア１００の他、第１ギア１０１～第１２ギア１１２を含む。第１ギア１０１及び第２ギア１０２は出力ギア１００と同軸上に設けられている。出力ギア１００及び第１ギア１０１～第１２ギア１１２は、モーターギア１３１ａから伝達された駆動力によってそれぞれ回転する。 The output shaft of the motor 131 protrudes to the front side of the support plate 130, and a motor gear 131a is attached to the tip of the output shaft. The motor gear 131a meshes with the output gear 100. Each gear constituting the gear group provided in front of the support plate 130 includes the first gear 101 to the twelfth gear 112 in addition to the output gear 100. The first gear 101 and the second gear 102 are provided coaxially with the output gear 100. The output gear 100 and the first gear 101 to the twelfth gear 112 are rotated by the driving force transmitted from the motor gear 131a.
　詳しくは、第１ギア１０１から出力される駆動力は、第３ギア１０３、第４ギア１０４及び第５ギア１０５へこの順番で伝達される。この結果、第３ギア１０３、第４ギア１０４及び第５ギア１０５がそれぞれ回転する。第４ギア１０４には第１回転軸１４１が軸止されており、第１回転軸１４１は第４ギア１０４と一体的に回転する。また、第５ギア１０５には第４回転軸１４４が軸止されており、第４回転軸１４４は第５ギア１０５と一体的に回転する。したがって、第１回転軸１４１に軸着された第１駆動ローラー３２１ａ及び第４回転軸１４４に軸着された排出駆動ローラー３３１ａが回転し、原稿Ｄを搬送する。 Specifically, the driving force output from the first gear 101 is transmitted to the third gear 103, the fourth gear 104, and the fifth gear 105 in this order. As a result, the third gear 103, the fourth gear 104, and the fifth gear 105 rotate. A first rotating shaft 141 is fixed to the fourth gear 104, and the first rotating shaft 141 rotates integrally with the fourth gear 104. In addition, a fourth rotation shaft 144 is fixed to the fifth gear 105, and the fourth rotation shaft 144 rotates integrally with the fifth gear 105. Accordingly, the first drive roller 321a attached to the first rotation shaft 141 and the discharge drive roller 331a attached to the fourth rotation shaft 144 rotate to convey the document D.
　また、第１ギア１０１から出力される駆動力は、第９ギア１０９、第１０ギア１１０、第１１ギア１１１及び第１２ギア１１２へもこの順番で伝達される。この結果、第９ギア１０９、第１０ギア１１０、第１１ギア１１１及び第１２ギア１１２がそれぞれ回転する。第１０ギア１１０には、第２回転軸１４２が軸止されており、第２回転軸１４２は第１０ギア１１０と一体的に回転する。また、第１２ギア１１２には、第３回転軸１４３が軸止されており、第３回転軸１４３は第１２ギア１１２と一体的に回転する。したがって、第２回転軸１４２に軸着された第２駆動ローラー３２２ａ及び第３回転軸１４３に軸着された第３駆動ローラー３２３ａが回転し、原稿Ｄを搬送する。 The driving force output from the first gear 101 is also transmitted to the ninth gear 109, the tenth gear 110, the eleventh gear 111, and the twelfth gear 112 in this order. As a result, the ninth gear 109, the tenth gear 110, the eleventh gear 111, and the twelfth gear 112 rotate. A second rotation shaft 142 is fixed to the tenth gear 110, and the second rotation shaft 142 rotates integrally with the tenth gear 110. Further, a third rotating shaft 143 is fixed to the twelfth gear 112, and the third rotating shaft 143 rotates integrally with the twelfth gear 112. Accordingly, the second driving roller 322a attached to the second rotating shaft 142 and the third driving roller 323a attached to the third rotating shaft 143 rotate to transport the document D.
　一方、第２ギア１０２から出力される駆動力は、第６ギア１０６及び第７ギア１０７を介して、クラッチ１３２に設けられた第８ギア１０８に伝達される。したがって、クラッチ１３２がＯＮになることにより、第８ギア１０８に軸止された第５回転軸１４５が第８ギア１０８と一体的に回転する。これにより、給紙ローラー３１２ａが回転する。また、クラッチ１３２がＯＦＦになると、第５回転軸１４５への駆動力の伝達が解除されて、第５回転軸１４５の回転が停止する。これにより、給紙ローラー３１２ａの回転が停止する。 On the other hand, the driving force output from the second gear 102 is transmitted to the eighth gear 108 provided in the clutch 132 via the sixth gear 106 and the seventh gear 107. Accordingly, when the clutch 132 is turned ON, the fifth rotating shaft 145 fixed to the eighth gear 108 rotates integrally with the eighth gear 108. As a result, the paper feed roller 312a rotates. When the clutch 132 is turned off, the transmission of the driving force to the fifth rotating shaft 145 is released, and the rotation of the fifth rotating shaft 145 is stopped. Thereby, the rotation of the paper feed roller 312a is stopped.
　続いて、図４（ａ）及び図４（ｂ）を参照して、出力ギア１００、第１ギア１０１及び第２ギア１０２について説明する。図４（ａ）は、出力ギア１００、第１ギア１０１及び第２ギア１０２の正面図であり、図４（ｂ）は、出力ギア１００、第１ギア１０１及び第２ギア１０２の断面図である。 Subsequently, the output gear 100, the first gear 101, and the second gear 102 will be described with reference to FIGS. 4 (a) and 4 (b). 4A is a front view of the output gear 100, the first gear 101, and the second gear 102, and FIG. 4B is a cross-sectional view of the output gear 100, the first gear 101, and the second gear 102. is there.
　図４（ａ）に示すように、第１ギア１０１及び第２ギア１０２は、出力ギア１００と同軸上に配置されて、出力ギア１００と共に３段ギアを構成している。また、図４（ｂ）に示すように、出力ギア１００の一方の面１００ａに形成された凹部に第１ギア１０１の一部が嵌合して固定されており、出力ギア１００の他方の面１００ｂに形成された凹部に第２ギア１０２の一部が嵌合して固定されている。したがって、出力ギア１００が回転することにより、第１ギア１０１及び第２ギア１０２が出力ギア１００と共に回転する。 As shown in FIG. 4A, the first gear 101 and the second gear 102 are arranged coaxially with the output gear 100 and constitute a three-stage gear together with the output gear 100. Further, as shown in FIG. 4B, a part of the first gear 101 is fitted and fixed to a recess formed on one surface 100 a of the output gear 100, and the other surface of the output gear 100. Part of the second gear 102 is fitted and fixed in the recess formed in 100b. Therefore, when the output gear 100 rotates, the first gear 101 and the second gear 102 rotate together with the output gear 100.
　以上、図１～図４を参照して説明したように、出力ギア１００は、モーターギア１３１ａから駆動力が直接的に伝達されるギアである。このため、出力ギア１００は、第１ギア１０１及び第２ギア１０２の回転を安定させることができる。すなわち、出力ギア１００は、第１ギア１０１及び第２ギア１０２に対してフライホイールとして作用することができる。したがって、シート搬送装置１０は、別途フライホイールを用いることなく、第１ギア１０１及び第２ギア１０２を安定して回転させることができる。この結果、シート搬送装置１０は、クラッチ１３２がＯＮとＯＦＦとを繰り返しても、第１ギア１０１を介して駆動力が伝達される第１駆動ローラー３２１ａ、第２駆動ローラー３２２ａ、第３駆動ローラー３２３ａ及び排出駆動ローラー３３１ａを安定して回転させることができる。よって、シート搬送装置１０は、原稿の搬送速度を安定させることができ、原稿の読み取り画像のブレや色ずれの発生を緩和することができる。 As described above with reference to FIGS. 1 to 4, the output gear 100 is a gear to which driving force is directly transmitted from the motor gear 131a. For this reason, the output gear 100 can stabilize the rotation of the first gear 101 and the second gear 102. That is, the output gear 100 can act as a flywheel for the first gear 101 and the second gear 102. Therefore, the sheet conveying apparatus 10 can stably rotate the first gear 101 and the second gear 102 without using a separate flywheel. As a result, the sheet conveying apparatus 10 has the first driving roller 321a, the second driving roller 322a, and the third driving roller to which the driving force is transmitted via the first gear 101 even when the clutch 132 is repeatedly turned on and off. 323a and the discharge drive roller 331a can be rotated stably. Therefore, the sheet conveying apparatus 10 can stabilize the document conveyance speed, and can reduce the occurrence of blurring and color misregistration of the read image of the document.
　また、図３に示すように、中間ギアである第６ギア１０６及び第３ギア１０３が同軸上に配置されることで、ギアを支持する部材（例えば、ピン）の数を減らすことができる。 Also, as shown in FIG. 3, the sixth gear 106 and the third gear 103, which are intermediate gears, are arranged coaxially, so that the number of members (for example, pins) that support the gear can be reduced.
　なお、図４（ｃ）に示すように、出力ギア１００と第１ギア１０１との間及び出力ギア１００と第２ギア１０２との間に衝撃緩和材１３３が設けられてもよい。図４（ｃ）は、出力ギア１００、第１ギア１０１及び第２ギア１０２の他例を示す断面図である。例えば、図４（ｃ）に示す出力ギア１００の凹部に衝撃緩和材１３３が設けられてもよい。これにより、クラッチ１３２から第１ローラー１２１への衝撃の伝達が軽減される。即ち、クラッチ１３２がＯＮとＯＦＦとを切り替えると衝撃が発生する。その衝撃は、第２ギア１０２へ伝達される。第２ギア１０２へ伝達された衝撃は出力ギア１００、及び第１ギア１０１へ伝達される。第１ギア１０１へ伝達された衝撃は、複数の第１ローラー１２１（第１駆動ローラー３２１ａ、第２駆動ローラー３２２ａ、第３駆動ローラー３２３ａ及び排出駆動ローラー３３１ａ）へ伝達される。しかし、出力ギア１００と第１ギア１０１との間及び出力ギア１００と第２ギア１０２との間に衝撃緩和材１３３が設けられることにより、第１ローラー１２１への衝撃の伝達が軽減される。衝撃緩和材１３３には、ゴムなどの弾性部材が使用できる。 In addition, as shown in FIG.4 (c), the impact relaxation material 133 may be provided between the output gear 100 and the 1st gear 101, and between the output gear 100 and the 2nd gear 102. FIG. FIG. 4C is a cross-sectional view showing another example of the output gear 100, the first gear 101, and the second gear 102. For example, the impact relaxation material 133 may be provided in the concave portion of the output gear 100 shown in FIG. Thereby, the transmission of the impact from the clutch 132 to the first roller 121 is reduced. That is, an impact is generated when the clutch 132 is switched between ON and OFF. The impact is transmitted to the second gear 102. The impact transmitted to the second gear 102 is transmitted to the output gear 100 and the first gear 101. The impact transmitted to the first gear 101 is transmitted to a plurality of first rollers 121 (a first drive roller 321a, a second drive roller 322a, a third drive roller 323a, and a discharge drive roller 331a). However, by providing the impact relaxation material 133 between the output gear 100 and the first gear 101 and between the output gear 100 and the second gear 102, transmission of impact to the first roller 121 is reduced. An elastic member such as rubber can be used for the impact relaxation material 133.
　続いて、図１～図３及び図５を参照して、本実施形態における原稿Ｄの搬送方法について説明する。図５は、シート搬送装置１０の動作を示すフローチャートである。図５に示すように、シート搬送装置１０は、ステップＳ５０２からステップＳ５０８を実行することによって、原稿Ｄを搬送路３４０に沿って搬送する。 Subsequently, a method for conveying the document D in the present embodiment will be described with reference to FIGS. 1 to 3 and FIG. FIG. 5 is a flowchart showing the operation of the sheet conveying apparatus 10. As shown in FIG. 5, the sheet conveying apparatus 10 conveys the document D along the conveying path 340 by executing steps S <b> 502 to S <b> 508.
　ステップＳ５０２：モーター１３１が駆動する。これにより、モーター１３１から出力ギア１００に駆動力が伝達されて、出力ギア１００と同軸上に配置された第１ギア１０１及び第２ギア１０２が回転する。この結果、第１ローラー１２１（第１駆動ローラー３２１ａ、第２駆動ローラー３２２ａ、第３駆動ローラー３２３ａ及び排出駆動ローラー３３１ａ）が回転する。 Step S502: The motor 131 is driven. As a result, the driving force is transmitted from the motor 131 to the output gear 100, and the first gear 101 and the second gear 102 arranged coaxially with the output gear 100 rotate. As a result, the first roller 121 (the first drive roller 321a, the second drive roller 322a, the third drive roller 323a, and the discharge drive roller 331a) rotates.
　ステップＳ５０４：クラッチ１３２がＯＮになる。これにより、第２ギア１０２から第８ギア１０８へ伝達された駆動力が第２ローラー１２２（給紙ローラー３１２ａ）へ伝達されて、第２ローラー１２２（給紙ローラー３１２ａ）が回転する。 Step S504: The clutch 132 is turned on. Accordingly, the driving force transmitted from the second gear 102 to the eighth gear 108 is transmitted to the second roller 122 (paper feed roller 312a), and the second roller 122 (paper feed roller 312a) rotates.
　ステップＳ５０６：給紙ローラー群３１２よりも下流に設けられた第１原稿検知センサーによって原稿Ｄの後端が検知されると、クラッチ１３２がＯＦＦになる。これにより、第２ローラー１２２（給紙ローラー３１２ａ）の回転が停止する。 Step S506: When the rear end of the document D is detected by the first document detection sensor provided downstream of the paper feed roller group 312, the clutch 132 is turned off. Thereby, rotation of the 2nd roller 122 (paper feed roller 312a) stops.
　ステップＳ５０７：第２原稿検知センサーが、原稿トレイ３１１に原稿Ｄが載置されているか否かを検知する。第２原稿検知センサーは、給紙口３０１Ｆ近傍の筐体３０１内部に設置されている。ユーザーが複数の原稿Ｄを重ねて原稿トレイ３１１上に載置した場合、第２原稿検知センサーは、その複数の原稿Ｄが全て原稿トレイ３１１から搬送路３４０へ給紙されるまで、原稿Ｄを検知する。第２原稿検知センサーによって、原稿トレイ３１１に原稿Ｄが載置されていることが検知された場合（ステップＳ５０７：Ｙｅｓ）、処理は、ステップＳ５０４へ戻る。したがって、原稿トレイ３１１に複数の原稿Ｄが載置された場合、ステップＳ５０４～ステップＳ５０６の処理が繰り返されることにより、クラッチ１３２がＯＮとＯＦＦとを繰り返して、原稿トレイ３１１に載置された複数の原稿Ｄが１枚ずつ搬送路３４０に沿って搬送される。第２原稿検知センサーによって、原稿トレイ３１１に原稿Ｄが載置されていないことが検知された場合（ステップＳ５０７：Ｎｏ）、処理は、ステップＳ５０８へ進む。 Step S507: The second document detection sensor detects whether or not the document D is placed on the document tray 311. The second document detection sensor is installed inside the housing 301 in the vicinity of the paper feed port 301F. When the user places a plurality of documents D on the document tray 311, the second document detection sensor scans the document D until all the documents D are fed from the document tray 311 to the transport path 340. Detect. If the second document detection sensor detects that the document D is placed on the document tray 311 (step S507: Yes), the process returns to step S504. Therefore, when a plurality of documents D are placed on the document tray 311, the processes in steps S 504 to S 506 are repeated, whereby the clutch 132 is repeatedly turned ON and OFF, and a plurality of documents placed on the document tray 311 are placed. Originals D are conveyed along the conveyance path 340 one by one. If the second document detection sensor detects that the document D is not placed on the document tray 311 (step S507: No), the process proceeds to step S508.
　ステップＳ５０８：モーター１３１が停止する。 Step S508: The motor 131 stops.
［実施形態２］
　次に、図６を参照して本発明の実施形態２に係る画像形成装置について説明する。図６は、画像形成装置の構成を示す模式図である。 [Embodiment 2]
Next, an image forming apparatus according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 6 is a schematic diagram illustrating a configuration of the image forming apparatus.
　画像形成装置１は、複写機であり、本体２０と、自動原稿搬送装置３０とを備える。更に、画像形成装置１は、原稿読取部２１０と、給紙部２２０と、作像部２４０と、転写装置２５０と、定着装置２６０と、排出部２７０と、手差しトレイ２８１と、制御部２９０と、搬送部Ｌとを更に備える。 The image forming apparatus 1 is a copying machine and includes a main body 20 and an automatic document feeder 30. Further, the image forming apparatus 1 includes a document reading unit 210, a paper feeding unit 220, an image forming unit 240, a transfer device 250, a fixing device 260, a discharge unit 270, a manual feed tray 281, and a control unit 290. And a transport unit L.
　自動原稿搬送装置３０は、画像形成装置１の本体２０の上部に設置される。図１を参照して説明したように、自動原稿搬送装置３０は、原稿トレイ３１１に載置された複数の原稿Ｄを１枚ずつ搬送路３４０に沿って搬送する。自動原稿搬送装置３０は、原稿Ｄの搬送過程において原稿Ｄの画像を読み取り、画像データを生成する。なお、自動原稿搬送装置３０は、本体２０に対して開閉可能に取り付けられており、自動原稿搬送装置３０が開くと本体２０上面に設けられた原稿台２１１が露出する。画像形成装置１は、原稿台２１１に原稿Ｄが載置された場合、本体２０に設けられた原稿読取部２１０によって原稿Ｄの画像を読み取り、画像データを生成する。 The automatic document feeder 30 is installed on the upper part of the main body 20 of the image forming apparatus 1. As described with reference to FIG. 1, the automatic document feeder 30 conveys a plurality of documents D placed on the document tray 311 one by one along the conveyance path 340. The automatic document feeder 30 reads an image of the document D in the course of transporting the document D, and generates image data. The automatic document feeder 30 is attached to the main body 20 so as to be openable and closable. When the automatic document feeder 30 is opened, the document table 211 provided on the upper surface of the main body 20 is exposed. When the document D is placed on the document table 211, the image forming apparatus 1 reads an image of the document D by the document reading unit 210 provided in the main body 20, and generates image data.
　給紙部２２０は、本体２０の下部に配置される。給紙部２２０は、複数枚の用紙Ｐを収容し、用紙Ｐを１枚ずつ搬送部Ｌへ給紙する。 The paper feeding unit 220 is disposed at the lower part of the main body 20. The paper feeding unit 220 stores a plurality of papers P and feeds the papers P one by one to the transport unit L.
　搬送部Ｌは、第１搬送部Ｌ１と第２搬送部Ｌ２と第３搬送部Ｌ３と第４搬送部Ｌ４とを含む。 The transport unit L includes a first transport unit L1, a second transport unit L2, a third transport unit L3, and a fourth transport unit L4.
　第１搬送部Ｌ１は、給紙部２２０によって給紙された用紙Ｐを、作像部２４０を経由して定着装置２６０まで搬送する。第１搬送部Ｌ１は、第１１駆動ローラー１１ａとレジストローラー対１２とを含む。 The first transport unit L1 transports the paper P fed by the paper feed unit 220 to the fixing device 260 via the image forming unit 240. The first transport unit L1 includes an eleventh drive roller 11a and a registration roller pair 12.
　第１１駆動ローラー１１ａは、用紙Ｐの搬送方向に対して第１搬送部Ｌ１と第４搬送部Ｌ４との合流点よりも下流に配置される。第１１駆動ローラー１１ａは、用紙Ｐをレジストローラー対１２へ向けて搬送する。 The eleventh drive roller 11a is arranged downstream of the junction of the first transport unit L1 and the fourth transport unit L4 with respect to the transport direction of the paper P. The eleventh drive roller 11 a conveys the paper P toward the registration roller pair 12.
　レジストローラー対１２は、駆動レジストローラー１２ａと、駆動レジストローラー１２ａに当接された従動レジストローラー１２ｂとを含む。駆動レジストローラー１２ａは、駆動力が伝達されて回転し、従動レジストローラー１２ｂは、駆動レジストローラー１２ａの回転に応じて回転する。第１１駆動ローラー１１ａから送られた用紙Ｐは、停止しているレジストローラー対１２に当接する。これにより用紙Ｐの斜行補正が行われる。そして、レジストローラー対１２は、転写装置２５０によるトナー像の転写タイミングと用紙Ｐの搬送とを同期させるために用紙Ｐを一時待機させた後、用紙Ｐを転写タイミングに合わせて定着装置２６０へ向けて搬送する。 The registration roller pair 12 includes a driving registration roller 12a and a driven registration roller 12b in contact with the driving registration roller 12a. The driving registration roller 12a rotates by receiving a driving force, and the driven registration roller 12b rotates according to the rotation of the driving registration roller 12a. The paper P sent from the eleventh driving roller 11a comes into contact with the stopped registration roller pair 12. Thereby, the skew correction of the paper P is performed. Then, the registration roller pair 12 temporarily waits for the paper P in order to synchronize the transfer timing of the toner image by the transfer device 250 and the conveyance of the paper P, and then directs the paper P to the fixing device 260 in accordance with the transfer timing. Transport.
　第２搬送部Ｌ２は、定着装置２６０から搬送された用紙Ｐを第３搬送部Ｌ３又は排出部２７０へ向けて搬送する。 The second transport unit L2 transports the paper P transported from the fixing device 260 toward the third transport unit L3 or the discharge unit 270.
　第３搬送部Ｌ３は、用紙Ｐの両面に画像を形成する場合に使用される。 The third transport unit L3 is used when images are formed on both sides of the paper P.
　第４搬送部Ｌ４は、手差しトレイ２８１に載置された用紙Ｐに画像を形成する場合に使用される。第４搬送部Ｌ４は、手差しトレイ２８１から給紙された用紙Ｐを第１搬送部Ｌ１まで搬送する。第４搬送部Ｌ４は、第１４搬送ローラー対１４を含む。 The fourth transport unit L4 is used when an image is formed on the paper P placed on the manual feed tray 281. The fourth transport unit L4 transports the paper P fed from the manual feed tray 281 to the first transport unit L1. The fourth transport unit L4 includes a fourteenth transport roller pair 14.
　第１４搬送ローラー対１４は、第１４駆動ローラー１４ａと、第１４駆動ローラー１４ａに当接された第１４従動ローラー１４ｂとを含む。第１４駆動ローラー１４ａは、駆動力が伝達されると回転し、第１４従動ローラー１４ｂは、第１４駆動ローラー１４ａの回転に応じて回転する。手差しトレイ２８１から給紙された用紙Ｐは、第１４駆動ローラー１４ａ及び第１４従動ローラー１４ｂに挟まれて、第１搬送部Ｌ１へ向けて搬送される。 The fourteenth transport roller pair 14 includes a fourteenth drive roller 14a and a fourteenth driven roller 14b in contact with the fourteenth drive roller 14a. The fourteenth driving roller 14a rotates when the driving force is transmitted, and the fourteenth driven roller 14b rotates according to the rotation of the fourteenth driving roller 14a. The paper P fed from the manual feed tray 281 is sandwiched between the fourteenth drive roller 14a and the fourteenth driven roller 14b and conveyed toward the first conveyance unit L1.
　作像部２４０は、読取装置３５０によって生成された画像データに基づいてトナー像を形成する。作像部２４０は、露光装置２４１と複数の感光体ドラム２４２と複数の現像ローラー２４３とを含む。複数の現像ローラー２４３の各々は、各感光体ドラム２４２に対応して配置される。 The image forming unit 240 forms a toner image based on the image data generated by the reading device 350. The image forming unit 240 includes an exposure device 241, a plurality of photosensitive drums 242, and a plurality of developing rollers 243. Each of the plurality of developing rollers 243 is disposed corresponding to each photosensitive drum 242.
　露光装置２４１は、画像データに基づいて各感光体ドラム２４２にレーザー光を照射して露光し、静電潜像を形成する。各現像ローラー２４３は、対応する感光体ドラム２４２にトナーを供給して静電潜像を現像する。これにより、各感光体ドラム２４２にトナー像が形成される。 The exposure device 241 irradiates each photoconductor drum 242 with laser light based on the image data to form an electrostatic latent image. Each developing roller 243 supplies toner to the corresponding photosensitive drum 242 to develop the electrostatic latent image. As a result, a toner image is formed on each photosensitive drum 242.
　転写装置２５０は、１次転写ローラー２５１と２次転写ローラー２５２と従動ローラー２５３と中間転写ベルト２５４とを含む。転写装置２５０は、各感光体ドラム２４２に形成されたトナー像を用紙Ｐに重ねて転写する。 The transfer device 250 includes a primary transfer roller 251, a secondary transfer roller 252, a driven roller 253, and an intermediate transfer belt 254. The transfer device 250 transfers the toner images formed on the respective photosensitive drums 242 so as to overlap the paper P.
　１次転写ローラー２５１は、中間転写ベルト２５４を介して感光体ドラム２４２に対向して配置される。中間転写ベルト２５４は、１次転写ローラー２５１によって感光体ドラム２４２に圧接される。これにより、トナー像が、感光体ドラム２４２の表面から中間転写ベルト２５４に転写される。 The primary transfer roller 251 is disposed to face the photosensitive drum 242 with the intermediate transfer belt 254 interposed therebetween. The intermediate transfer belt 254 is pressed against the photosensitive drum 242 by the primary transfer roller 251. As a result, the toner image is transferred from the surface of the photosensitive drum 242 to the intermediate transfer belt 254.
　２次転写ローラー２５２及び従動ローラー２５３は互いに押圧し、ニップ部を形成する。２次転写ローラー２５２及び従動ローラー２５３は、用紙Ｐがニップ部を通過する際に、中間転写ベルト２５４上のトナー像を用紙Ｐに転写する。 The secondary transfer roller 252 and the driven roller 253 press each other to form a nip portion. The secondary transfer roller 252 and the driven roller 253 transfer the toner image on the intermediate transfer belt 254 to the paper P when the paper P passes through the nip portion.
　定着装置２６０は、定着部材２６１及び加圧部材２６２によって用紙Ｐを加熱及び加圧することで、転写装置２５０によって転写された未定着のトナー像を用紙Ｐに定着させる。 The fixing device 260 fixes the unfixed toner image transferred by the transfer device 250 onto the paper P by heating and pressurizing the paper P with the fixing member 261 and the pressure member 262.
　排出部２７０は、トナー像が定着された用紙Ｐを装置外へ排出する。 The discharge unit 270 discharges the paper P on which the toner image is fixed to the outside of the apparatus.
　手差しトレイ２８１は、複数枚の用紙Ｐを載置することができる。手差し給紙ローラー２８２は、手差しトレイ２８１に載置された用紙Ｐを１枚ずつ給紙し、第１４搬送ローラー対１４へ向けて搬送する。 The manual feed tray 281 can place a plurality of sheets of paper P. The manual paper feed roller 282 feeds the paper P placed on the manual tray 281 one by one and transports it toward the fourteenth transport roller pair 14.
　制御部２９０は、記憶領域を有する。記憶領域は、プログラムや設定情報などを記憶する。記憶領域は、ＲＡＭ（Ｒａｎｄｏｍ　Ａｃｃｅｓｓ　Ｍｅｍｏｒｙ）及びＲＯＭ（Ｒｅａｄ　Ｏｎｌｙ　Ｍｅｍｏｒｙ）を含む。制御部２９０は、ＲＯＭに予め記憶された各種の制御プログラムを実行することにより、画像形成装置１全体の動作を制御する。 The control unit 290 has a storage area. The storage area stores programs, setting information, and the like. The storage area includes a RAM (Random Access Memory) and a ROM (Read Only Memory). The control unit 290 controls the overall operation of the image forming apparatus 1 by executing various control programs stored in advance in the ROM.
　以上、図６を参照して本発明の実施形態２に係る画像形成装置１の動作について説明した。なお、本実施形態では、画像形成装置１として複写機が例示されたが、画像形成装置１は、複写機に限定されるものでなく、例えば、ファクシミリ又はこれらの機能を兼ね備えた複合機であり得る。 The operation of the image forming apparatus 1 according to the second embodiment of the present invention has been described above with reference to FIG. In the present embodiment, a copying machine is exemplified as the image forming apparatus 1, but the image forming apparatus 1 is not limited to a copying machine, and is, for example, a facsimile machine or a multifunction machine having these functions. obtain.
　また、本実施形態では、シート搬送装置１０が自動原稿搬送装置３０及び画像形成装置１に適用される場合について説明したが、シート搬送装置１０が適用される装置はこれらに限定されない。例えば、シート搬送装置１０は、スキャナーに適用することができる。 In this embodiment, the case where the sheet conveying apparatus 10 is applied to the automatic document conveying apparatus 30 and the image forming apparatus 1 has been described. However, the apparatus to which the sheet conveying apparatus 10 is applied is not limited thereto. For example, the sheet conveying apparatus 10 can be applied to a scanner.
　以上、本発明の実施形態について、図面（図１～図６）を参照しながら説明した。但し、本発明は、上記の実施形態に限られるものではなく、その要旨を逸脱しない範囲で種々の態様において実施することが可能である。 The embodiment of the present invention has been described above with reference to the drawings (FIGS. 1 to 6). However, the present invention is not limited to the above-described embodiment, and can be implemented in various modes without departing from the gist thereof.
　例えば、本発明の実施形態では、シート搬送装置１０が自動原稿搬送装置３０に適用される場合について説明したが、シート搬送装置１０は、手差し給紙ローラー２８２及び第１４駆動ローラー１４ａに適用されてもよい。詳しくは、第１４駆動ローラー１４ａとして第１ローラー１２１が使用され、手差し給紙ローラー２８２として第２ローラー１２２が使用されてもよい。この場合、シート搬送装置１０のクラッチ１３２がＯＮとＯＦＦとを繰り返すことで手差し給紙ローラー２８２の回転及びその回転の停止が繰り返される。この結果、手差しトレイ２８１に載置された複数枚の用紙Ｐが第４搬送部Ｌ４へ１枚ずつ搬送される。第１４駆動ローラー１４ａは、手差し給紙ローラー２８２によって給紙された用紙Ｐを第１搬送部Ｌ１へ向けて搬送する。 For example, in the embodiment of the present invention, the case where the sheet conveying apparatus 10 is applied to the automatic document conveying apparatus 30 has been described. However, the sheet conveying apparatus 10 is applied to the manual feed roller 282 and the fourteenth driving roller 14a. Also good. Specifically, the first roller 121 may be used as the fourteenth drive roller 14a, and the second roller 122 may be used as the manual paper feed roller 282. In this case, the manual feed roller 282 is repeatedly rotated and stopped when the clutch 132 of the sheet conveying apparatus 10 is repeatedly turned on and off. As a result, the plurality of sheets P placed on the manual feed tray 281 are conveyed one by one to the fourth conveyance unit L4. The fourteenth drive roller 14a conveys the paper P fed by the manual paper feed roller 282 toward the first conveyance unit L1.
　また、シート搬送装置１０は、第１１駆動ローラー１１ａ及び駆動レジストローラー１２ａに適用されてもよい。詳しくは、第１１駆動ローラー１１ａとして第１ローラー１２１が使用され、駆動レジストローラー１２ａとして、第２ローラー１２２が使用されてもよい。この場合、第１１駆動ローラー１１ａは、給紙された用紙Ｐをレジストローラー対１２へ向けて搬送する。また、シート搬送装置１０のクラッチ１３２がＯＮになると、駆動レジストローラー１２ａが回転し、クラッチ１３２がＯＦＦになると、駆動レジストローラー１２ａの回転が停止する。よって、転写タイミングに合わせて用紙Ｐを定着装置２６０（ニップ部）へ向けて搬送することができる。 Further, the sheet conveying apparatus 10 may be applied to the eleventh driving roller 11a and the driving registration roller 12a. Specifically, the first roller 121 may be used as the eleventh driving roller 11a, and the second roller 122 may be used as the driving registration roller 12a. In this case, the eleventh drive roller 11 a conveys the fed paper P toward the registration roller pair 12. Further, when the clutch 132 of the sheet conveying apparatus 10 is turned on, the driving registration roller 12a is rotated, and when the clutch 132 is turned off, the rotation of the driving registration roller 12a is stopped. Therefore, the paper P can be conveyed toward the fixing device 260 (nip portion) in accordance with the transfer timing.
　また、本発明の実施形態においてモーター１３１の数は１つであるが、モーター１３１の数は２つ以上であり得る。 In the embodiment of the present invention, the number of the motors 131 is one, but the number of the motors 131 may be two or more.
　また、本発明の実施形態において出力ギア１００の数は１つであるが、出力ギア１００の数はモーターギア１３１ａの数に応じて変化し得る。 Also, in the embodiment of the present invention, the number of output gears 100 is one, but the number of output gears 100 may vary depending on the number of motor gears 131a.
　また、本発明の実施形態では、出力ギア１００の凹部に衝撃緩和材１３３が設けられる場合について説明したが、衝撃緩和材１３３は、出力ギア１００と第１ギア１０１との間、及び、出力ギア１００と第２ギア１０２との間に配置されていればよく、衝撃緩和材１３３が配置される箇所は出力ギア１００の凹部に限定されない。 In the embodiment of the present invention, the case where the impact relaxation material 133 is provided in the concave portion of the output gear 100 has been described. However, the impact relaxation material 133 is provided between the output gear 100 and the first gear 101 and between the output gear 100 and the output gear 100. 100 and the second gear 102 are only required to be disposed, and the place where the shock absorbing material 133 is disposed is not limited to the concave portion of the output gear 100.
　また、衝撃緩和材１３３は、出力ギア１００と第１ギア１０１との間、及び、出力ギア１００と第２ギア１０２との間のうちの一方に配置されてもよい。 Further, the impact relaxation material 133 may be disposed between the output gear 100 and the first gear 101 and between the output gear 100 and the second gear 102.
　また、本発明の実施形態では、出力ギア１００が第１ギア１０１と第２ギア１０２との間に配置される場合について説明したが、出力ギア１００の配置される箇所は、第１ギア１０１と第２ギア１０２との間に限定されない。 In the embodiment of the present invention, the case where the output gear 100 is disposed between the first gear 101 and the second gear 102 has been described. However, the position where the output gear 100 is disposed is the same as that of the first gear 101. It is not limited between the second gear 102.
　また、本発明の実施形態では、クラッチ１３２を介して駆動力が伝達される回転軸（第５回転軸１４５）が１つである場合について説明したが、クラッチ１３２を介して駆動力が伝達される回転軸は２つ以上であり得る。 Further, in the embodiment of the present invention, the case where there is one rotating shaft (fifth rotating shaft 145) to which the driving force is transmitted via the clutch 132 has been described, but the driving force is transmitted via the clutch 132. There may be two or more rotation axes.
　また、本発明の実施形態では、自動原稿搬送装置３０が備える搬送ローラー対（第１搬送ローラー対３２１、第２搬送ローラー対３２２、第３搬送ローラー対３２３）の数は、３つであるが、自動原稿搬送装置３０が備える搬送ローラー対の数は、１～２又は４つ以上であり得る。 In the embodiment of the present invention, the number of conveyance roller pairs (first conveyance roller pair 321, second conveyance roller pair 322, and third conveyance roller pair 323) included in the automatic document conveyance device 30 is three. The number of conveyance roller pairs provided in the automatic document conveyance device 30 may be 1 to 2, 4 or more.
　また、本発明の実施形態では、シート搬送装置１０の第１回転軸１４１、第２回転軸１４２、第３回転軸１４３及び第４回転軸１４４がそれぞれ回転可能に支持するローラー（第１駆動ローラー３２１ａ、第２駆動ローラー３２２ａ、第３駆動ローラー３２３ａ及び排出駆動ローラー３３１ａ）の数は２つであるが、第１回転軸１４１、第２回転軸１４２、第３回転軸１４３及び第４回転軸１４４がそれぞれ回転可能に支持するローラーの数は１つ又は３つ以上であってもよい。 In the embodiment of the present invention, the first rotation shaft 141, the second rotation shaft 142, the third rotation shaft 143, and the fourth rotation shaft 144 of the sheet conveying apparatus 10 are rotatably supported by rollers (first driving rollers). 321a, second driving roller 322a, third driving roller 323a, and discharge driving roller 331a) are two, but the first rotating shaft 141, the second rotating shaft 142, the third rotating shaft 143, and the fourth rotating shaft. The number of rollers 144 that each 144 rotatably supports may be one or three or more.
　また、本発明の実施形態では、シート搬送装置１０の第５回転軸１４５が回転可能に支持するローラー（給紙ローラー３１２ａ）の数は１つであるが、第５回転軸１４５が回転可能に支持するローラー（給紙ローラー３１２ａ）の数は、２つ以上であってもよい。 In the embodiment of the present invention, the number of rollers (paper feed roller 312a) that the fifth rotation shaft 145 of the sheet conveying apparatus 10 supports rotatably is one, but the fifth rotation shaft 145 can rotate. The number of rollers (paper feed rollers 312a) to support may be two or more.
　また、本発明の実施形態では、電子写真方式の画像形成装置に本発明を適用した場合について説明したが、本発明は、例えば、インクジェット方式の画像形成装置にも適用可能である。 In the embodiment of the present invention, the case where the present invention is applied to an electrophotographic image forming apparatus has been described. However, the present invention can also be applied to, for example, an inkjet image forming apparatus.
　また、本発明の実施形態では、被記録媒体が用紙Ｐである場合について説明したが、被記録媒体は、用紙Ｐ以外（例えば、樹脂製シートや布帛）であってもよい。 In the embodiment of the present invention, the case where the recording medium is the paper P has been described. However, the recording medium may be other than the paper P (for example, a resin sheet or fabric).
　なお、図面は、理解しやすくするために、それぞれの構成要素を主体に模式的に示している。したがって、図示された各構成要素の厚み、長さ等は、図面作成の都合上から実際とは異なる。 In addition, in order to make it easy to understand, the drawings schematically show each component mainly. Accordingly, the thickness, length, and the like of each illustrated component are different from actual ones for the convenience of drawing.

Claims (9)

  1. 　シートを搬送するための第１ローラーと、
    　シートを搬送するための第２ローラーと、
    　駆動力を発生させる駆動源と、
    　前記駆動源から伝達された駆動力に基づいて回転する出力ギアと、
    　前記出力ギアと同軸上に配置され、前記出力ギアと共に回転して前記第１ローラーへ向けて駆動力を伝達する第１ギアと、
    　前記出力ギアと同軸上に配置され、前記出力ギアと共に回転して前記第２ローラーへ向けて駆動力を伝達する第２ギアと、
    　前記第２ローラーへの駆動力の伝達とその伝達の解除を切り替えるクラッチと
    を備える、シート搬送装置。
    A first roller for conveying the sheet;
    A second roller for conveying the sheet;
    A driving source for generating a driving force;
    An output gear that rotates based on the driving force transmitted from the driving source;
    A first gear that is arranged coaxially with the output gear and that rotates with the output gear and transmits a driving force toward the first roller;
    A second gear that is arranged coaxially with the output gear and that rotates with the output gear and transmits a driving force toward the second roller;
    A sheet conveying apparatus comprising: a driving force transmitted to the second roller; and a clutch for switching the cancellation of the transmission.
  2. 　前記出力ギアが、前記第１ギアと前記第２ギアとの間に配置される、請求項１に記載のシート搬送装置。
    The sheet conveying apparatus according to claim 1, wherein the output gear is disposed between the first gear and the second gear.
  3. 　前記第２ギアと前記第２ギアに隣接する前記出力ギアとの間又は前記第１ギアと前記第２ギアとの間に配置される衝撃緩和部材を更に備える、請求項１に記載のシート搬送装置。
    2. The sheet conveyance according to claim 1, further comprising an impact reduction member disposed between the second gear and the output gear adjacent to the second gear or between the first gear and the second gear. apparatus.
  4. 　前記第２ギアから駆動力が伝達されて回転することにより前記第２ローラーへ向けて駆動力を伝達する中間ギアと、
    　前記中間ギアと同軸上に配置され、前記第１ギアから駆動力が伝達されて回転することにより前記第１ローラーへ向けて駆動力を伝達する第３ギアと、
    を更に備える、請求項１に記載のシート搬送装置。
    An intermediate gear that transmits the driving force toward the second roller by rotating the driving force transmitted from the second gear;
    A third gear that is arranged coaxially with the intermediate gear and that transmits the driving force toward the first roller by being rotated by the driving force transmitted from the first gear;
    The sheet conveying apparatus according to claim 1, further comprising:
  5. 　原稿が載置される原稿トレイと、
    　請求項１に記載のシート搬送装置と
    を備え、
    　前記第１ローラーは、前記原稿を搬送路に沿って搬送する搬送ローラーであり、
    　前記第２ローラーは、前記原稿を前記原稿トレイから前記搬送路に給紙する給紙ローラーである、自動原稿搬送装置。
    A document tray on which documents are placed;
    And a sheet conveying device according to claim 1,
    The first roller is a transport roller that transports the document along a transport path,
    The automatic document feeder, wherein the second roller is a paper feed roller for feeding the document from the document tray to the transport path.
  6. 　請求項５に記載の自動原稿搬送装置と、
    　被記録媒体に画像を形成する画像形成部と
    　を備えた、画像形成装置。
    An automatic document feeder according to claim 5;
    An image forming apparatus comprising: an image forming unit that forms an image on a recording medium.
  7. 　被記録媒体が載置される手差しトレイと、
    　請求項１に記載のシート搬送装置と
    を備え、
    　前記第１ローラーは、前記被記録媒体を搬送路に沿って搬送する搬送ローラーであり、
    　前記第２ローラーは、前記被記録媒体を前記手差しトレイから前記搬送路へ給紙する給紙ローラーである、画像形成装置。
    A manual feed tray on which a recording medium is placed;
    And a sheet conveying device according to claim 1,
    The first roller is a transport roller that transports the recording medium along a transport path,
    The image forming apparatus, wherein the second roller is a paper feed roller that feeds the recording medium from the manual feed tray to the transport path.
  8. 　被記録媒体にトナー像を転写させて画像を形成する画像形成装置であって、
    　前記被記録媒体にトナー像を転写させる転写装置と、
    　請求項１に記載のシート搬送装置と
    を備え、
    　前記第１ローラーは、前記被記録媒体を搬送路に沿って搬送する搬送ローラーであり、
    　前記第２ローラーは、前記転写装置へ前記被記録媒体を送るレジストローラーである、画像形成装置。
    An image forming apparatus for forming an image by transferring a toner image to a recording medium,
    A transfer device for transferring a toner image to the recording medium;
    And a sheet conveying device according to claim 1,
    The first roller is a transport roller that transports the recording medium along a transport path,
    The image forming apparatus, wherein the second roller is a registration roller that sends the recording medium to the transfer device.
  9. 　駆動源を駆動させて、前記駆動源から出力ギアに駆動力を伝達することにより、前記出力ギアと同軸上に配置された第１ギア及び第２ギアを回転させて、第１ローラーを回転させることと、
    　クラッチをＯＮにして前記第２ギアから第２ローラーへ駆動力を伝達させて、前記第２ローラーを回転させることと
    を含み、
    　前記第１ローラー及び前記第２ローラーを回転させてシートを搬送させる、シート搬送方法。     By driving the driving source and transmitting the driving force from the driving source to the output gear, the first gear and the second gear arranged coaxially with the output gear are rotated to rotate the first roller. And
    Turning on the clutch and transmitting the driving force from the second gear to the second roller to rotate the second roller;
    A sheet conveying method in which a sheet is conveyed by rotating the first roller and the second roller.
PCT/JP2015/061243 2014-05-27 2015-04-10 Sheet feeding device, automatic document feeder, image formation device, and sheet feeding method WO2015182263A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-108814 2014-05-27
JP2014108814 2014-05-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106585129A (en) * 2016-11-11 2017-04-26 天津光电通信技术有限公司 Transmission mechanism for office equipment

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Publication number Priority date Publication date Assignee Title
JPS6019625A (en) * 1983-07-14 1985-01-31 Canon Inc Recording device
JP2000281223A (en) * 1999-03-31 2000-10-10 Konica Corp Paper feed roller, paper feeding device and image forming device
JP2003212370A (en) * 2002-01-23 2003-07-30 Oki Data Corp Paper feeder
JP2013220867A (en) * 2012-04-13 2013-10-28 Kyocera Document Solutions Inc Sheet conveyance device, sheet feeder including the same, and image forming apparatus

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
JPS6019625A (en) * 1983-07-14 1985-01-31 Canon Inc Recording device
JP2000281223A (en) * 1999-03-31 2000-10-10 Konica Corp Paper feed roller, paper feeding device and image forming device
JP2003212370A (en) * 2002-01-23 2003-07-30 Oki Data Corp Paper feeder
JP2013220867A (en) * 2012-04-13 2013-10-28 Kyocera Document Solutions Inc Sheet conveyance device, sheet feeder including the same, and image forming apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106585129A (en) * 2016-11-11 2017-04-26 天津光电通信技术有限公司 Transmission mechanism for office equipment
CN106585129B (en) * 2016-11-11 2018-10-09 天津光电通信技术有限公司 A kind of office equipment transmission mechanism

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