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CN-122009889-A - Medium conveying device and image reading device

CN122009889ACN 122009889 ACN122009889 ACN 122009889ACN-122009889-A

Abstract

The invention provides a medium conveying device and an image reading device capable of improving the conveying performance of a medium while suppressing the power consumption. The medium conveying device is provided with a discharge portion having a discharge roller capable of discharging a medium, a discharge tray having a mounting surface on which the medium discharged from the discharge portion is mounted, and a stopper provided on the discharge tray and capable of being displaced to a first state in which the movement of the medium to be discharged in the discharge direction is restricted by being in a state protruding from the mounting surface, and a second state in which the movement of the medium in the discharge direction is permitted by being in a state not protruding from the mounting surface, and the discharge portion is configured to be capable of decelerating the discharge speed of the medium realized by the discharge roller from the first speed to the second speed, and the degree of deceleration from the first speed to the second speed is smaller when the stopper is in the first state than when the stopper is in the second state.

Inventors

  • YAMASAKI MASAYA

Assignees

  • 精工爱普生株式会社

Dates

Publication Date
20260512
Application Date
20251107
Priority Date
20241112

Claims (15)

  1. 1. A medium conveying device is characterized by comprising: a discharge unit having a discharge roller capable of discharging the medium; a discharge tray having a placement surface for placing the medium discharged from the discharge unit; A stopper provided on the discharge tray and capable of being displaced to a first state in which the movement of the discharged medium in the discharge direction is restricted by the state protruding from the mounting surface, and a second state in which the movement of the medium in the discharge direction is permitted by the state not protruding from the mounting surface, The discharge section is configured to be capable of decelerating a discharge speed of the medium by the discharge roller from a first speed to a second speed when the medium is discharged, The degree of deceleration from the first speed to the second speed is less when the stop is in the first state than when the stop is in the second state.
  2. 2. A medium transporting device according to claim 1, wherein, The stopper is configured to be displaceable to the first state and the second state according to the type of the medium.
  3. 3. A medium transporting device according to claim 1, wherein, The stopper is configured to be able to change a position in the discharge direction according to a size of the medium.
  4. 4. A medium transporting device according to claim 1, wherein, The stopper is configured to be capable of changing a protruding amount of the medium placed on the placement surface with respect to the placement surface in the first state according to a placement amount of the medium.
  5. 5. A medium transporting device according to claim 1, wherein, The discharge tray is configured to be capable of changing a position of the placement surface with respect to the discharge portion in a placement direction of the medium according to a placement amount of the medium placed on the placement surface.
  6. 6. The medium conveying apparatus according to claim 1, comprising: a photographing unit that photographs the medium; A displacement mechanism that displaces the stopper to the first state and the second state, The displacement mechanism is configured to be able to displace the stopper to the first state and the second state based on the image data of the medium captured by the capturing unit.
  7. 7. A medium conveying device is characterized by comprising: a feed tray for placing a medium thereon; a feeding portion that feeds the medium placed on the feeding tray; a discharge portion capable of discharging the medium fed by the feeding portion; a discharge tray having a placement surface for placing the medium discharged from the discharge unit; a photographing unit that photographs the medium; The control part is used for controlling the control part to control the control part, The control unit causes the imaging unit to image the medium before being discharged from the discharge unit, and during or after being discharged from the discharge unit, and determines the state of the medium after being discharged from the discharge unit based on image data of one surface of the medium before being discharged from the discharge unit and image data of one surface of the medium after being discharged from the discharge unit.
  8. 8. The medium transporting device according to claim 7, wherein, The control section causes the image capturing section to capture an image of the medium placed on the feed tray, causes the image capturing section to capture an image of the medium being discharged or after being discharged from the discharge section, and determines a state of the medium being discharged from the discharge section based on image data of the medium placed on the feed tray and image data of the medium being discharged or after being discharged from the discharge section.
  9. 9. The medium transporting device according to claim 7, wherein, The control unit causes the image capturing unit to capture an image of the medium being conveyed on a conveyance path from the feed tray to the discharge unit, causes the image capturing unit to capture an image of the medium being discharged or after being discharged from the discharge unit, and determines a state of the medium being discharged from the discharge unit based on image data of the medium being conveyed on the conveyance path and image data of the medium being discharged or after being discharged from the discharge unit.
  10. 10. The medium transporting device according to claim 7, wherein, The feed tray has an edge guide movable in a direction intersecting a feed direction of the medium, The control section causes the photographing section to photograph the medium placed on the feed tray, and causes the edge guide to move based on image data of the medium photographed by the photographing section.
  11. 11. The medium transporting device according to claim 7, wherein, The discharge tray has an edge guide movable in a direction crossing a discharge direction of the medium, The control unit causes the image pickup unit to pick up at least one of the medium placed on the feed tray and the medium placed on the discharge tray, and causes the edge guide to move based on the image data of the medium picked up by the image pickup unit.
  12. 12. The medium transporting device according to claim 7, wherein, A stopper provided on the discharge tray and capable of being displaced to a first state in which the medium to be discharged is restricted from moving in the discharge direction by being projected from the mounting surface, and a second state in which the medium is allowed to move in the discharge direction by being fallen down to the mounting surface, The control unit causes the imaging unit to image the medium placed on the feed tray, and causes the stopper to displace to the first state and the second state based on image data of the medium placed on the feed tray.
  13. 13. The medium transporting device according to claim 7, wherein, The control unit causes the imaging unit to image a part of the medium.
  14. 14. The medium transporting device according to claim 7, wherein, The control unit determines a state of the medium after being discharged from the discharge unit based on a part of image data of one surface of the medium before being discharged from the discharge unit and a part of image data of one surface of the medium during or after being discharged from the discharge unit.
  15. 15. An image reading apparatus comprising: the media transport apparatus of any one of claims 1 to 14; an image reading section that reads an image formed on the medium.

Description

Medium conveying device and image reading device Technical Field The present invention relates to a medium conveying device and an image reading apparatus. Background Conventionally, various medium conveying apparatuses capable of conveying a medium have been used. Among them, there is an image reading apparatus that reads an image of a medium to be conveyed. For example, patent document 1 discloses a medium conveying apparatus including an imaging device for reading an image of a conveyed medium. In the medium conveying apparatus disclosed in patent document 1, the medium conveying apparatus is configured to be capable of discharging media having different sizes, and the medium discharged from the discharge roller is placed on the discharge tray. In a conventional medium conveying apparatus such as the medium conveying apparatus disclosed in patent document 1, in a case where a plurality of media are continuously conveyed, there is a concern about conveyance performance, which is a problem that occurs with conveyance of the media, such as whether or not the order of the media is changed, in a process in which the media are discharged from the discharge roller toward the discharge tray. In the medium conveying device disclosed in patent document 1, in order to improve the alignment of the medium on the discharge tray, which is an example of the conveyance property of the medium, the discharge speed of the medium by the discharge roller is configured to be able to be reduced from the first conveying speed to the second conveying speed. However, if the discharge speed of the medium by the discharge roller is greatly reduced, the power consumption of the motor or the like driving the discharge roller increases. Patent document 1 Japanese patent application laid-open No. 2023-137046 Disclosure of Invention The medium conveying device for solving the above-mentioned problems is characterized by comprising a discharge portion having a discharge roller capable of discharging a medium, a discharge tray having a mounting surface on which the medium discharged from the discharge portion is mounted, and a stopper provided on the discharge tray and capable of being displaced to a first state in which the movement of the discharged medium in the discharge direction is restricted by the state of being protruded from the mounting surface, and a second state in which the movement of the medium in the discharge direction is allowed by the state of being not protruded from the mounting surface, wherein the discharge portion is configured to be capable of decelerating the discharge speed of the medium achieved by the discharge roller from the first speed to the second speed, and the degree of deceleration of the medium from the first speed to the second speed is smaller than that of the stopper when the first state is in the first state. The other medium conveying apparatus according to the present invention for solving the above-described problems is characterized by comprising a feeding tray for placing a medium, a feeding unit for feeding the medium placed on the feeding tray, a discharging unit capable of discharging the medium fed by the feeding unit, a discharging tray having a placement surface for placing the medium discharged from the discharging unit, an imaging unit for imaging the medium, and a control unit for causing the imaging unit to image the medium before and during or after discharge from the discharging unit, and to determine a state of the medium after discharge from the discharging unit based on image data of one surface of the medium before discharge from the discharging unit and image data of one surface of the medium after discharge from the discharging unit. Drawings Fig. 1 is a side view of an image reading apparatus of embodiment 1 of the present invention. Fig. 2 is a block diagram of the image reading apparatus of fig. 1. Fig. 3 is a side view showing the periphery of the discharge tray of the image reading apparatus of fig. 1, and is a view for explaining when the stopper is in the first state and when it is in the second state. Fig. 4 is a plan view showing the periphery of the discharge tray of the image reading apparatus of fig. 1, and is a diagram for explaining the unfolding and storage mechanism of the stopper. Fig. 5 is a plan view showing the periphery of the discharge tray of the image reading apparatus of fig. 1, and is a diagram for explaining a movement mechanism of the edge guide. Fig. 6 is a side view showing the periphery of the discharge tray of the image reading apparatus of fig. 1, and is a view when the stopper is in the first state when a medium of a large size is used. Fig. 7 is a side view showing the periphery of the discharge tray of the image reading apparatus of fig. 1, and is a view when a plurality of large-sized media are further stacked from the state of fig. 6. Fig. 8 is a schematic side view of the image reading apparatus of fig. 1. Fig. 9 is a flowchart showing