WO2011104989A1 - Sheet separating mechanism - Google Patents

Sheet separating mechanism Download PDF

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Publication number
WO2011104989A1
WO2011104989A1 PCT/JP2010/073313 JP2010073313W WO2011104989A1 WO 2011104989 A1 WO2011104989 A1 WO 2011104989A1 JP 2010073313 W JP2010073313 W JP 2010073313W WO 2011104989 A1 WO2011104989 A1 WO 2011104989A1
Authority
WO
WIPO (PCT)
Prior art keywords
urging
separation
document
pressing plate
piece
Prior art date
Application number
PCT/JP2010/073313
Other languages
French (fr)
Japanese (ja)
Inventor
信次 鵜飼
享伸 平山
Original Assignee
ブラザー工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ブラザー工業株式会社 filed Critical ブラザー工業株式会社
Publication of WO2011104989A1 publication Critical patent/WO2011104989A1/en

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Classifications

    • 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
    • B65H3/0653—Rollers or like rotary separators for separating substantially vertically stacked articles
    • 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
    • B65H3/063—Rollers or like rotary separators separating from the bottom of pile
    • 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
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/52—Friction retainers acting on under or rear side of article being separated
    • B65H3/5207—Non-driven retainers, e.g. movable retainers being moved by the motion of the article
    • B65H3/523—Non-driven retainers, e.g. movable retainers being moved by the motion of the article the retainers positioned over articles separated from the bottom of the pile
    • B65H3/5238—Retainers of the pad-type, e.g. friction pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2402/00—Constructional details of the handling apparatus
    • B65H2402/20—Force systems, e.g. composition of forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2402/00—Constructional details of the handling apparatus
    • B65H2402/50—Machine elements
    • B65H2402/54—Springs, e.g. helical or leaf springs

Definitions

  • the present invention relates to a document separation mechanism that separates and transports a single document from a plurality of stacked documents.
  • a document separation mechanism that separates and transports a single document from a plurality of stacked documents.
  • a proposal has been made for a separation sheet feeding unit in which a friction separation pad is pressed against a feed roller.
  • a first pressure position and a second pressure position are configured by two leaf spring members, and primary separation and separation are performed at each position with respect to a document fed by a pickup roller. Secondary separation is performed.
  • Patent Document 1 it is assumed that the document is surely reduced to a certain number or less by the primary separation, and only one document is conveyed downstream by the secondary separation.
  • Patent Document 2 proposes a paper separation mechanism of a paper feeding device.
  • the pad mounting surface of the pad piece is formed in a curved surface shape.
  • the paper separation mechanism disclosed in Patent Document 2 includes a swing mechanism that supports the pad piece so that the pad piece can swing as the separate roller rotates.
  • a first urging means for urging the oscillating pad piece in a direction opposite to the direction in which the pad piece oscillates by the rotation of the separation roller is provided.
  • the first urging means urges the lower surface of one end of the pad piece that is rocked by the rocking mechanism and is inclined to the downstream side of the paper conveyance path by an elastic force, thereby causing the pad piece to be upstream of the paper conveyance path. It is biased by the elastic force in the direction of tilting. Further, a second urging means is provided to urge the pad piece and press the separation pad against the separation roller.
  • the first urging means and the second urging means are coil springs that urge the pad piece with elastic force.
  • Patent Document 1 when separating a single document from a plurality of overlapping documents, according to the configuration of Patent Document 1, a position where the document is separated is formed by two urging means, and the document is separated. Is applied to the document at each position. Therefore, there is a high risk of document damage due to the pressing force acting on the document at each position. Further, according to the configuration as in Patent Document 2, it is necessary to consider the pressing direction of the first urging means according to the swing mechanism, and there is a problem that the mechanism becomes complicated.
  • An object of the present invention is to provide a new document separation mechanism capable of solving the above-described problem and suitably separating one document from a plurality of stacked documents.
  • One aspect of the present invention made in view of the above-described conventional problems is a document separation mechanism that separates and transports a single document from a plurality of stacked documents, and separates a first document from a plurality of stacked documents.
  • a separation roller that conveys the separated first document while rotating, and a second document that is disposed in proximity to the outer peripheral surface of the separation roller and adheres to the first document that is conveyed by the separation roller,
  • the separation piece biased by the first biasing portion is further biased to the outer peripheral surface side of the separation roller.
  • the separation piece is moved from the predetermined position to the separation row. If advanced to the outer circumferential surface of a document separating mechanism, characterized in that it comprises a second biasing portion does not bias the separation pad.
  • the separation piece becomes a resistance, and the second document can be preferably separated from the first document. it can.
  • the adhesive force between the first document and the second document and the adhesion between the second documents due to the frictional force between the separating piece and the second document. It becomes large and reliable separation cannot be performed.
  • the urging force against the separation piece can be increased. Therefore, it is possible to increase the frictional force between the separation piece and the second original, and the separation piece can be suitably functioned as a resistance against the second original.
  • the second urging unit does not urge. Therefore, it is always possible to avoid a state in which the separation piece is pressed by a high urging force toward the outer peripheral surface of the separation roller.
  • the separation piece arranged close to the outer peripheral surface of the separation roller means a state in which the separation roller and the separation piece are close to each other, and the state in the vicinity includes a state in which both are in contact with each other. It is.
  • This document separation mechanism can be configured as follows. That is, the first biasing portion and the second biasing portion are elastic members that are elastically deformed in the biasing direction, and the second biasing portion has a length in the biasing direction of the first biasing portion.
  • the first urging portion is shorter than the length of the urging direction, and the second urging portion has an elastic deformation amount of the first urging portion opposite to the urging direction to the first urging portion.
  • the separation piece is further urged toward the outer peripheral surface side of the separation roller, and the amount of elastic deformation of the first urging portion in the direction opposite to the urging direction is the first urging portion and the second urging portion.
  • the amount is smaller than the amount based on the difference in length of the urging direction with the urging portion. It may be characterized not to urge the serial separation pad.
  • the amount based on the difference in length in the biasing direction between the first biasing portion and the second biasing portion is the length in the biasing direction between the first biasing portion and the second biasing portion.
  • first urging portion and the second urging portion are configured such that a force for compressing the second urging portion by a certain amount is equal to or greater than a force for compressing the first urging portion by the certain amount. It is good also as having the relationship which becomes. According to this, when the separation piece moves backward beyond a predetermined position, a larger urging force can be applied to the separation piece.
  • a separation piece can be urged
  • first guide portion that guides the movement of the first pressing plate corresponding to the backward and forward movement of the separation piece.
  • the movement of the first pressing plate that is, the backward movement and the forward movement can be suitably performed, and the separation piece and the first pressing plate can be preferably brought into surface contact.
  • the separation piece has the 2nd press plate provided between the said separation piece and the said 2nd biasing part, and the said 2nd biasing part biases the said separation piece via the said 2nd press plate.
  • This may be a feature. According to this, the separation piece can be urged via the surface forming the second pressing plate.
  • the second pressing plate may be characterized by having a second guide part for guiding the movement of the second pressing plate corresponding to the backward and forward movement of the separation piece. According to this, the movement of the second pressing plate, that is, the backward movement and the forward movement can be suitably performed.
  • the second guide part may be formed with a restriction part for restricting the second pressing plate from moving forward to the outer peripheral surface side of the separation roller at the predetermined position. According to this, the urging
  • the document separation mechanism includes a first pressing plate provided between the separation piece and the first urging portion, and the first urging portion is interposed between the first pressing plate and the first urging portion.
  • the separation piece is urged
  • the document separation mechanism has a second pressing plate provided between the separation piece and the second urging portion, and the second urging portion is the second pressing portion.
  • the separation piece is urged through a plate, and the predetermined position moves backward in the direction opposite to the urging direction of the first urging portion against the urging force of the first urging portion.
  • the first pressing plate and the second pressing plate may be in a position in the biasing direction of the separation piece. According to this, it is possible to suitably separate one original from a plurality of originals that overlap each other.
  • the spring constant of the second urging portion may be equal to or greater than the spring constant of the first urging portion. According to this, when the separation piece moves backward beyond a predetermined position, a larger urging force can be applied to the separation piece.
  • a mechanism for suitably changing the urging force applied to the separation piece according to the number of documents is provided, a new document capable of suitably separating a single document from a plurality of overlapping documents is provided.
  • a document separation mechanism can be obtained.
  • the urging force of the separation piece to the separation roller when the number of documents is small can be set weak, excessive wear of the separation piece and the separation roller can be reduced.
  • FIG. 2A is a view showing a document separating mechanism according to the first embodiment
  • FIG. 2B is a sectional view taken along line FF in FIG. 2A
  • FIG. 2C is a sectional view taken along line GG in FIG.
  • (A) is a view showing a document separating mechanism of the second embodiment
  • (b) is a cross-sectional view taken along line HH in FIG. 3 (a)
  • (c) is a cross-sectional view taken along II in FIG. 3 (a). It is sectional drawing.
  • FIG. 4 (A) is a view showing a document separating mechanism of the third embodiment
  • (b) is a JJ sectional view of FIG. 4 (a)
  • (c) is a KK of FIG. 4 (a).
  • (A) is a view showing a document separating mechanism of the fourth embodiment
  • (b) is a cross-sectional view taken along the line PP in FIG. 5 (a)
  • (c) is a QQ in FIG. 5 (a). It is sectional drawing. It is a figure which shows another original document separation mechanism.
  • the document separation mechanism 100 of this embodiment can be employed in a copier, a printer, a facsimile machine, or the like.
  • the document separation mechanism 100 can be employed in a scanner device 20 as shown in FIG.
  • the scanner device 20 having the document separation mechanism 100 will be described as an example.
  • the scanner device 20 has an appearance as shown in FIG. 1A.
  • the scanner device 20 includes a paper feed tray 130 and a paper discharge tray 180.
  • the scanner device 20 includes a document separation mechanism 100 therein.
  • a document 300 to be read is set on the paper feed tray 130.
  • a plurality of documents 300 are set on the sheet feed tray 130 in an overlapping state.
  • the document separation mechanism 100 conveys the document 300 set on the paper feed tray 130 to the paper discharge tray 180.
  • the document separation mechanism 100 separates a plurality of documents 300 that overlap each other on the paper feed tray 130. A detailed description of the document separation mechanism 100 will be described later.
  • the paper discharge tray 180 receives the original 300 that is separated by the original separation mechanism 100 and discharged by a predetermined roller in the scanner device 20.
  • the scanner device 20 includes a document separation mechanism 100, a line feed roller (hereinafter, also referred to as “LF roller”) 140, image reading units 150A and 150B, and paper discharge. It has a roller 160 and pinch rollers 170A and 170B.
  • LF roller line feed roller
  • the LF roller 140 conveys the original 300A to the image reading units 150A and 150B.
  • the document 300A is a single document that has been separated and conveyed by a separation roller 102 included in a document separation mechanism 100 described later.
  • the LF roller 140 is installed on one side of the conveyed document 300A.
  • the LF roller 140 is supported by the shaft portion 142.
  • the pinch roller 170A is arranged on the other surface side different from the surface on which the LF roller 140 is arranged on the original surface of the conveyed original 300A. That is, the pinch roller 170A is disposed to face the LF roller 140.
  • the pinch roller 170A is supported by the shaft portion 172A, and rotates following the LF roller 140.
  • the LF roller 140 and the pinch roller 170A sandwich the single document 300A that has been separated and conveyed by the separation roller 102 and convey it to the image reading units 150A and 150B.
  • This conveyance is realized by rotating the shaft portion 142 supporting the LF roller 140 by a rotation driving mechanism such as a motor and the LF roller 140 in accordance with the rotation of the document 300A.
  • the pinch roller 170A rotates following the LF roller 140.
  • the arrows in the LF roller 140 and the pinch roller 170A in FIG. 1B indicate the rotation directions of the LF roller 140 and the pinch roller 170A.
  • the image reading units 150A and 150B read an image recorded on the conveyed document 300A.
  • the image reading units 150A and 150B include, for example, a CIS (Contact Image Sensor).
  • a CCD ChargedCharCoupled Device
  • the image reading unit 150A is provided on one side of the conveyed document 300A and reads the other side, for example, the front side.
  • the image reading unit 150B is provided on one side of the conveyed document 300A, and reads one side, for example, the back side.
  • a double-sided reading function is realized by the image reading units 150A and 150B.
  • the paper discharge roller 160 conveys the single original 300A conveyed through the image reading units 150A and 150B to the downstream side in the conveying direction. That is, the paper discharge roller 160 conveys the conveyed document 300A to the paper discharge tray 180 installed on the downstream side in the conveyance direction.
  • the paper discharge roller 160 is disposed on one side of the conveyed document 300A.
  • the paper discharge roller 160 is supported by the shaft portion 162.
  • the pinch roller 170B is arranged on the other side of the original surface of the conveyed document 300A, which is different from the surface on which the paper discharge roller 160 is arranged. That is, the pinch roller 170B is disposed to face the paper discharge roller 160.
  • the pinch roller 170 ⁇ / b> B is supported by the shaft portion 172 ⁇ / b> B and rotates following the paper discharge roller 160.
  • the paper discharge roller 160 and the pinch roller 170B sandwich the single document 300A conveyed through the image reading units 150A and 150B and convey it to the paper discharge tray 180 side. This conveyance is realized by rotating the shaft portion 162 supporting the paper discharge roller 160 by a rotation driving mechanism such as a motor in the state where the document 300A is held, and rotating the paper discharge roller 160 accordingly.
  • the pinch roller 170 ⁇ / b> B rotates following the paper discharge roller 160.
  • the arrows in the paper discharge roller 160 and the pinch roller 170B in FIG. 1B indicate the rotation directions of the paper discharge roller 160 and the pinch roller 170B.
  • the paper discharge tray 180 is conveyed by the paper discharge roller 160 and the pinch roller 170B and receives the discharged original 300A. Thereby, the reading operation of the document 300A is completed.
  • documents 300 different from the document 300 ⁇ / b> A already transported by the document separation mechanism 100 are sequentially transported. An image recorded on the document 300 conveyed sequentially is read. Then, the paper is sequentially discharged to the paper discharge tray 180.
  • the discharged original 300 is stacked on the paper discharge tray 180.
  • the scanner device 20 shown in FIG. 1A is in a state in which the paper discharge tray 180 is stored. In the scanner device 20, when the above-described reading operation is executed, the paper discharge tray 180 is pulled out in the pull-out direction shown in FIG. 1A and used in an extended state.
  • the description of the document separation mechanism 100 is a general term for the following document separation mechanisms 100A, 100B, 100C, and 100D.
  • the document separation mechanism 100A includes a separation roller 102, a separation piece 104, a first urging portion 106, a first pressing plate 108, and a second urging force. Part 110 and second pressing plate 112.
  • the first urging unit 106, the first pressing plate 108, the second urging unit 110, and the second pressing plate 112 are installed in a space between the separation piece 104 and the lid 24. .
  • the document separation mechanism 100A separates the document 300A from the loaded document 300.
  • the document 300B is a document on the other side of the document 300 set on the paper feed tray 130 as shown in FIG. 2A, which is different from the surface where the separation roller 102 and the document 300A are in contact. That is, the document 300B is a document that is separated by the document separation mechanism 100A after the document 300A is separated.
  • the separation roller 102 is supported by the shaft 114 on the same side as the LF roller 140 and the discharge roller 160 described above.
  • the shaft portion 114 is connected to a rotational drive mechanism such as a motor.
  • the rotation drive mechanism is driven and the shaft portion 114 is rotated accordingly, the separation roller 102 is also rotated in the direction of the arrow described in the separation roller 102 in FIG. 1B.
  • the separation roller 102 separates the single document 300A set at the lowest position in contact with the separation roller 102 from the document 300 set in a state of being overlapped on the paper feed tray 130. . Only the separation roller 102 may not be able to separate only one original 300A. In this case, the original 300A to be separated is separated with one or more originals 300B attached thereto.
  • the separation roller 102 conveys the separated document 300A in the direction determined by the rotation direction, that is, the conveyance direction. That is, it is conveyed to the LF roller 140 side.
  • the outer peripheral surface of the separation roller 102 is formed of rubber such as ethylene propylene rubber (EPDM) or silicon rubber.
  • the separation piece 104 is disposed close to the outer peripheral surface of the separation roller 102. Specifically, as shown in FIG. 1B, the separation piece 104 is arranged such that its tip end is close to the outer peripheral surface side of the separation roller 102. And the rear end part on the opposite side to the front end part is attached to a predetermined position on the lid 24 side.
  • the separation piece 104 is formed of an elastic member that can be elastically deformed, for example, rubber.
  • the separation piece 104 generates a frictional force between one or a plurality of documents 300B attached to the document 300A conveyed by the separation roller 102. The frictional force acts as a resistance to separate the document 300B from the document 300A.
  • the original 300A from which the original 300B has been separated passes between the separation roller 102 and the separation piece 104, and is conveyed to the LF roller 140 side according to the rotation of the separation roller 102 as described above.
  • the close state includes a contact state.
  • the first urging portion 106 and the second urging portion 110 are formed of an elastic member.
  • the first urging unit 106 and the second urging unit 110 have a relationship in which the compression amount of the first urging unit 106 is equal to or greater than the compression amount of the second urging unit 110 when the same force is applied.
  • the first urging unit 106 and the second urging unit 110 are formed by coil springs, and the spring constant of the second urging unit 110 is the first constant. It is set to be equal to or greater than the spring constant of one urging portion 106.
  • the first pressing plate 108 and the second pressing plate 112 are formed of a rigid body such as a resin having a predetermined rigidity.
  • One end of the first urging portion 106 is in contact with the first pressing plate 108, and the other end is installed at a predetermined position of the lid 24.
  • One surface of the first pressing plate 108 on which the first urging portion 106 is in contact is further opposed to the second pressing plate 112 with a gap t.
  • the other surface opposite to the one surface of the first pressing plate 108 is in surface contact with the separation piece 104.
  • One end of the second urging portion 110 is in contact with the surface of the second pressing plate 112 opposite to the surface facing the first pressing plate 108, and the other end is the same as the first urging portion 106 and has a predetermined In place.
  • the coil inner diameter of the second urging unit 110 is set larger than the coil outer diameter of the first urging unit 106.
  • the first urging unit 106 is accommodated in the second urging unit 110.
  • a through hole 122 is formed in the second pressing plate 112.
  • the first urging portion 106 is accommodated in the second urging portion 110 through the formed through hole 122.
  • the 1st energizing part 106 is accommodated in the 2nd energizing part 110 along the axis
  • the first urging unit 106 urges the separation piece 104 to the outer peripheral surface side of the separation roller 102 via the first pressing plate 108.
  • the separation piece 104 is pushed in the direction opposite to the biasing direction.
  • the first pressing plate 108 moves backward, and the first urging portion 106 is compressed correspondingly.
  • the position where the first pressing plate 108 is disposed in a state where the separation piece 104 is not pressed in the direction opposite to the urging direction by the document 300A or the like is set as a normal position.
  • the compression amount of the first urging portion 106 that is, the amount of elastic deformation becomes the gap t
  • the first pressing plate 108 and the second pressing plate 112 come into contact with each other.
  • the first pressing plate 108 and the second pressing plate 112 are in surface contact.
  • the position of the separation piece 104 where the first pressing plate 108 and the second pressing plate 112 are in contact with each other is also referred to as a reference position.
  • the second urging portion 110 is also compressed by the first pressing plate 108.
  • an urging force is generated by the second urging unit 110. Therefore, the separation piece 104 is also urged to the outer peripheral surface side of the separation roller 102 via the second pressing plate 112 and the first pressing plate 108 by the second urging unit 110. That is, when the separation piece 104 further moves backward beyond the reference position, it is urged toward the outer peripheral surface side of the separation roller 102 by the first urging portion 106 and the second urging portion 110.
  • the gap t is an amount based on a difference s in length between the first urging unit 106 and the second urging unit 110 in the urging direction. That is, the thickness u of the second pressing plate 112 from the difference s between the length L1 in the biasing direction at the normal position of the first biasing portion 106 and the length in the biasing direction between the second biasing portion 110, that is, the total length L2. Is the amount minus dimensions.
  • the number of documents 300 set on the sheet feeding tray 130 is reduced.
  • the number of documents 300B entering between the separation roller 102 and the separation piece 104 also decreases, and the force pushing the separation piece 104 in the direction opposite to the urging direction becomes smaller. Accordingly, the amount of compression between the first urging unit 106 and the second urging unit 110 is reduced.
  • the compression amount of the first urging unit 106 and the second urging unit 110 decreases and the separation piece 104 moves forward and reaches the reference position, the compression amount of the second urging unit 110 becomes 0, and the second urging unit The urging
  • the separation piece 104 advances toward the outer peripheral surface side of the separation roller 102 by the urging by the first urging unit 106.
  • the second urging unit 110 does not urge the separation piece 104.
  • the gap t in the document separation mechanism 100A is determined in consideration of various points. The determined gap t is ensured by adjusting, for example, the total length L2 of the second urging portion 110 and / or the thickness u of the second pressing plate 112.
  • the separation piece 104, the first pressing plate 108, and the second pressing plate 112 are in surface contact with each other, and therefore, according to the number of documents 300B existing between the separation piece 104 and the separation roller 102.
  • the force urged by the separation piece 104 can be changed.
  • the separation piece 104 is urged by the second urging unit 110, so that one document 300A can be reliably separated by the separation piece 104.
  • the document separation mechanism 100B of the second embodiment includes a separation roller 102, a separation piece 104, a first urging portion 106, a first pressing plate 108, and a second urging force. Part 110 and second pressing plate 112.
  • the document separation mechanism 100B further includes a first guide unit 116 and a second guide unit 118.
  • the second guide part 118 is formed with a restriction part 120.
  • the separation roller 102, the separation piece 104, the first urging unit 106, the first pressing plate 108, the second urging unit 110, and the second pressing plate 112 included in the document separation mechanism 100B are the same as those in the first embodiment.
  • the document separation mechanism 100A has been described as an example. Detailed description thereof will be omitted.
  • the first guide portion 116 guides the movement of the first pressing plate 108 corresponding to the backward and forward movement of the separation piece 104.
  • the second guide portion 118 guides the movement of the second pressing plate 112 corresponding to the backward and forward movement of the separation piece 104.
  • the restricting portion 120 restricts the second pressing plate 112 from moving forward to the outer peripheral surface side of the separation roller 102 and is formed at a reference position.
  • the first guide part 116 and the second guide part 118 are integrally formed.
  • a member in which the first guide portion 116 and the second guide portion 118 are integrally formed is installed at a predetermined position of the lid 24. And this member is installed facing the separation piece 104 in the state which protruded toward the separation roller 102 side like the urging
  • the outer peripheral side surface of the first pressing plate 108 is fitted to the inner peripheral surface M of the first guide portion 116 via a predetermined slight gap v.
  • the first pressing plate 108 moves along the inner peripheral surface M of the first guide portion 116.
  • the outer peripheral side surface of the second pressing plate 112 is fitted to the inner peripheral surface N of the second guide portion 118 via a predetermined slight gap w.
  • the second pressing plate 112 moves along the inner peripheral surface N of the second guide portion 118.
  • the dimension m between the inner peripheral surfaces M of the first guide part 116 is set smaller than the dimension n between the inner peripheral surfaces N of the second guide part 118.
  • the second guide portion 118 is formed with a step portion resulting from the difference between the dimension m between the inner peripheral surfaces M of the first guide portion 116 and the dimension n between the inner peripheral surfaces N of the second guide portion 118. Yes.
  • the dimension of the second pressing plate 112 in the direction between the inner peripheral surfaces N of the second guide portion 118 is set to be larger than the dimension m. Therefore, this step portion functions as the restriction portion 120 with respect to the movement of the second pressing plate 112 in the urging direction.
  • the first pressing plate 108 and the second pressing plate 112 are installed to face each other with a gap t.
  • the gap t in the document separation mechanism 100B is set by adjusting the position where the restricting portion 120 is formed.
  • the separation piece 104 is set in the urging direction. Pushed in the opposite direction.
  • the first pressing plate 108 moves backward along the inner peripheral surface M of the first guide portion 116, and the first urging portion 106 is compressed correspondingly.
  • the first pressing plate 108 and the second pressing plate 112 come into contact with each other. Specifically, the first pressing plate 108 and the second pressing plate 112 are in surface contact.
  • the second pressing plate 112 moves back along the inner peripheral surface N of the second guide portion 118.
  • the second urging unit 110 is also compressed by the first pressing plate 108. By being compressed by the first pressing plate 108, an urging force is generated by the second urging unit 110. Accordingly, when the separation piece 104 further moves backward beyond the reference position, the separation piece 104 is urged toward the outer peripheral surface side of the separation roller 102 by the first urging unit 106 and the second urging unit 110.
  • the compression amount of the first urging unit 106 and the second urging unit 110 decreases, and the separation piece 104 advances.
  • the separation piece 104 moves forward and reaches the reference position, the outer peripheral portion of the second pressing plate 112 comes into contact with the restricting portion 120. Even if the second pressing plate 112 in contact with the restricting portion 120 is urged by the second urging portion 110, it does not advance further to the outer peripheral surface side of the separation roller 102. Thereby, the urging
  • the operation realized in the document separation mechanism 100B is the same as that of the document separation mechanism 100A of the first embodiment. Therefore, the same function as that of the document separation mechanism 100A is realized by the document separation mechanism 100B. Further, in the document separation mechanism 100B, the first pressing plate 108 and the second pressing plate 112 move while being guided by the first guide portion 116 and the second guide portion 118, respectively. The first pressing plate 108 and the second pressing plate 112 can be preferably brought into surface contact.
  • the document separation mechanism 100C according to the third embodiment is similar to the document separation mechanism 100B according to the second embodiment, for example, as illustrated in FIGS. 4A to 4C, and includes a separation roller 102, a separation piece 104, and a first attachment. It has the urging portion 106, the first pressing plate 108, the second pressing plate 112, the first guide portion 116, the second guide portion 118, and the regulating portion 120.
  • the document separation mechanism 100C further includes two second urging units 110A and 110B.
  • the first urging portion 106 and the second urging portions 110A and 110B are formed by coil springs.
  • the two second urging units 110 ⁇ / b> A and 110 ⁇ / b> B are installed on both sides of the first urging unit 106 in a direction perpendicular to the urging direction by the first urging unit 106.
  • the first urging unit 106 and the second urging units 110A and 110B are installed in parallel on a straight line in a direction perpendicular to the urging direction by the first urging unit 106.
  • the first urging unit 106 and the second urging units 110A and 110B have the same relationship as the first urging unit 106 and the second urging unit 110 of the document separating mechanism 100A. That is, the spring constants of the second urging units 110A and 110B are set to be equal to or greater than the spring constant of the first urging unit 106.
  • the coil inner diameter and coil outer diameter of the first urging portion 106 and the second urging portions 110A and 110B are set so as to satisfy the above-described conditions. Note that such a relationship between the first urging unit 106 and the second urging units 110A and 110B is set so that each of the second urging units 110A and 110B satisfies the above-described conditions.
  • the above-described conditions may be satisfied for the two urging units 110A and 110B as a whole.
  • the spring constants of the entire second urging portions 110A and 110B installed in parallel are the sum of the respective spring constants.
  • the separation piece 104 is set in the urging direction. Pushed in the opposite direction.
  • the first pressing plate 108 moves backward along the inner peripheral surface M of the first guide portion 116, and the first urging portion 106 is compressed correspondingly.
  • the first pressing plate 108 and the second pressing plate 112 come into contact with each other. Specifically, the first pressing plate 108 and the second pressing plate 112 are in surface contact.
  • the second pressing plate 112 moves back along the inner peripheral surface N of the second guide portion 118.
  • the second urging portions 110A and 110B are also compressed by the first pressing plate 108.
  • an urging force is generated by the second urging units 110A and 110B. Accordingly, when the separation piece 104 further moves backward beyond the reference position, the separation piece 104 is urged toward the outer peripheral surface side of the separation roller 102 by the first urging portion 106 and the second urging portions 110A and 110B.
  • the compression amount of the first urging unit 106 and the second urging unit 110A, 110B decreases, and the separation piece 104 advances.
  • the separation piece 104 moves forward and reaches the reference position, the outer peripheral portion of the second pressing plate 112 comes into contact with the restricting portion 120.
  • the second pressing plate 112 in contact with the restricting portion 120 is urged by the second urging portions 110 ⁇ / b> A and 110 ⁇ / b> B, it does not advance further to the outer peripheral surface side of the separation roller 102. Thereby, the urging
  • the operation realized in the document separation mechanism 100C is the same as that of the document separation mechanisms 100A and 100B of the first and second embodiments.
  • the document separation mechanism 100C also realizes the same function as the document separation mechanisms 100A and 100B.
  • the document separation mechanism 100D of the fourth embodiment includes a separation roller 102, a separation piece 104, a first urging portion 106, and a first pressing plate 108, as shown in FIGS.
  • the document separation mechanism 100D has second urging portions 210A and 210B formed by an elastic member such as rubber instead of a coil spring.
  • the separation roller 102, the separation piece 104, the first urging unit 106, and the first pressing plate 108 included in the document separation mechanism 100D are as described in the document separation mechanism 100A of the first embodiment as an example. . Therefore, the detailed description regarding these is abbreviate
  • the first urging unit 106 and the second urging units 210A and 210B have a force for compressing the second urging units 210A and 210B by a certain amount, that is, a unit amount.
  • a certain amount that is, a unit amount.
  • the relationship between the first urging unit 106 and the second urging units 210A and 210B is set so that each of the second urging units 210A and 210B satisfies the above-described conditions.
  • the above-described conditions may be satisfied as a whole of the two urging units 210A and 210B.
  • the two second urging units 210A and 210B are installed on both sides of the first urging unit 106 in a direction perpendicular to the urging direction by the first urging unit 106.
  • the first urging unit 106 and the second urging units 210A and 210B are installed in parallel on a straight line in a direction perpendicular to the urging direction by the first urging unit 106.
  • the document separation mechanism 100D does not have the second pressing plate 112 that the document separation mechanisms 100A, 100B, 100C of the first to third embodiments have.
  • the second urging portions 210A and 210B are disposed so as to face the first pressing plate 108 in a state where the separation piece 104 is not pressed by the original 300A or the like and separated from the first pressing plate 108 by a gap t.
  • the gap t coincides with the difference s between the length L1 in the biasing direction at the normal position of the first biasing portion 106 and the length in the biasing direction between the second biasing portions 210A and 210B, that is, the total length L2.
  • the separation piece 104 is set in the urging direction. Pushed in the opposite direction.
  • the first pressing plate 108 moves backward, and the first urging portion 106 is compressed correspondingly.
  • the compression amount of the first urging portion 106 becomes the gap t and moves backward by the gap t from the normal position, the first pressing plate 108 and the second urging portions 210A and 210B come into contact with each other.
  • biasing part 210A, 210B As for 2nd urging
  • the operations realized in the document separation mechanism 100D are the same as those of the document separation mechanisms 100A, 100B, 100C of the first to third embodiments.
  • the document separation mechanism 100D also realizes the same function as the document separation mechanisms 100A, 100B, 100C, and the like.
  • the first urging portion 106 may be an elastic member such as rubber like the second urging portions 210A and 210B.
  • the following effects can be obtained.
  • a plurality of documents are pressed against the feed roller via the friction separation pad by elastic force. If the feed roller rotates now, the first document in contact with the feed roller overcomes the resistance from the friction separation pad, but the second and subsequent documents not in contact with the feed roller are resisted from the friction separation pad. Is not transported larger. As a result, a plurality of documents can be separated.
  • the frictional separation pad is brought into pressure contact with the feed roller with a large pressing force, there is a problem that wear of the frictional separation pad and the feed roller is increased and the life of the parts is shortened.
  • the force urged by the separation piece 104 is changed according to the number of documents 300B existing between the separation piece 104 and the separation roller 102. be able to. Therefore, excessive wear of the separation roller 102 and the separation piece 104 can be reduced.
  • the document separation mechanism 100 of the present embodiment can also be configured as follows.
  • the document separation mechanisms 100A, 100B, 100C, and 100D having the first pressing plate 108 have been described as examples.
  • the document separation mechanisms 100A, 100B, and 100C having the first pressing plate 108 and the second pressing plate 112 have been described as examples.
  • first pressing plate 108 or the second pressing plate 112 is omitted, and the first urging unit 106 and the second urging units 110, 110A, 110B, 210A, and 210B are provided.
  • the separation piece 104 may be directly biased.
  • the first guide unit 116 and the second guide unit 118 included in the document separation mechanism 100B according to the second embodiment may be omitted.
  • the difference s between the total length L1 of the first biasing portion 106 and the total length L2 of the second biasing portions 110, 110A, 110B, 210A, and 210B is a gap t.
  • the document separation mechanism 100 of the present embodiment may be a document separation mechanism 100E as shown in FIG. 6, and also includes such a document separation mechanism 100E.
  • the document separation mechanism 100E includes a separation roller 102, a separation piece 104, a first urging unit 406, and a second urging unit 410.
  • the first urging portion 406 and the second urging portion 410 are formed by leaf springs.
  • the first urging unit 406 and the second urging unit 410 are attached to a predetermined position of the lid 24 along the separation piece 104.
  • the separation piece 104, the first urging portion 406, and the second urging portion 410 are attached in the order of the second urging portion 410, the first urging portion 406, and the separation piece 104 from the lid 24 side.
  • the first urging portion 406 has a flat plate shape. One surface of the first urging portion 406 is installed in contact with the separation piece 104.
  • the second urging portion 410 has a stepped plate shape in which the second urging attachment portion 410A and the second urging main body portion 410B are integrally formed.
  • the second urging portion 410 is attached to the lid 24 side by the second urging attachment portion 410A, and urges the separation piece 104 by the second urging main body portion 410B.
  • the height of the step formed in the second urging portion 410 is set to a dimension corresponding to the gap t described above. That is, in the document separation mechanism 100E, the other surface of the first urging portion 406 and the surface of the second urging main body portion 410B facing this surface are installed in a state where they are separated by a gap t.
  • the first urging unit 406 and the second urging unit 410 have the same relationship as the first urging unit 106 and the second urging unit 110 of the document separating mechanism 100A.
  • the spring constant of the second urging unit 410 is set to be greater than or equal to the spring constant of the first urging unit 406.
  • the separation piece 104 when the document 300A and the plurality of documents 300B enter between the separation roller 102 and the separation piece 104 at a time, the separation piece 104 is set in the urging direction. Pushed in the opposite direction. When the separation piece 104 is pushed in the direction opposite to the urging direction, the first urging portion 406 is deformed correspondingly. When the first urging portion 406 is deformed by the gap t, the first urging portion 406 and the second urging main body portion 410B come into contact with each other. The position of the separation piece 104 where the first urging portion 406 and the second urging main body portion 410B are in contact corresponds to the reference position described above.
  • this position is also referred to as a reference position.
  • the second urging portion 410 is also deformed.
  • the urging force of the second urging unit 410 is generated. Therefore, when the separation piece 104 further moves backward beyond the reference position, the separation piece 104 is urged toward the outer peripheral surface side of the separation roller 102 by the first urging portion 406 and the second urging portion 410.
  • the operation realized in the document separation mechanism 100E is the same as that of the document separation mechanism 100 of the present embodiment.
  • the document separation mechanism 100E also achieves the same function as the document separation mechanism 100.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Abstract

Provided is a novel sheet separating mechanism which makes it possible to appropriately separate a single sheet from a plurality of stacked sheets. A sheet separating mechanism (100A) comprises a separating roller (102), a separating piece (104), a first urging part (106), and a second urging part (110). The separating roller (102) separates a sheet (300A) from a plurality of stacked sheets (300) and feeds the separated sheet (300A). The separating piece (104) is disposed close to the outer circumferential surface of the separating roller (102) and separates a sheet (300B), which is attached to the sheet (300A), from the sheet (300A). The first urging part (106) urges the separating piece (104) toward the outer circumferential surface of the separating roller (102). If the separating piece (104) moves backward against the urging force of the first urging part (106), beyond a predetermined position toward the side opposite to the urging direction, the second urging part (110) applies additional urging force to the separating piece (104) which is being urged by the first urging part (106). If the separating piece (104) moves forward from the predetermined position toward the outer circumferential surface of the separating roller (102), the second urging part (110) does not apply additional urging force to the separating piece (104).

Description

原稿分離機構Document separation mechanism
　本発明は、複数枚重なり合った原稿から一枚の原稿を分離し、搬送する原稿分離機構に関するものである。 The present invention relates to a document separation mechanism that separates and transports a single document from a plurality of stacked documents.
　従来から、複数枚重なり合った原稿から一枚の原稿を分離し、搬送する原稿分離機構に関する提案がなされている。例えば、摩擦分離パッドがフィードローラに圧接した分離給紙部についての提案がなされている。特許文献１の分離給紙部では、２つの板ばね部材により第１の加圧位置及び第２の加圧位置を構成し、ピックアップローラにより送り出された原稿に対してそれぞれの位置で一次分離及び二次分離が行われる。特許文献１では、一次分離によって原稿が確実に一定枚数以下に減少し、二次分離によって１枚の原稿のみが下流側に搬送されるとされている。 Conventionally, proposals have been made regarding a document separation mechanism that separates and transports a single document from a plurality of stacked documents. For example, a proposal has been made for a separation sheet feeding unit in which a friction separation pad is pressed against a feed roller. In the separation paper feeding unit of Patent Document 1, a first pressure position and a second pressure position are configured by two leaf spring members, and primary separation and separation are performed at each position with respect to a document fed by a pickup roller. Secondary separation is performed. According to Patent Document 1, it is assumed that the document is surely reduced to a certain number or less by the primary separation, and only one document is conveyed downstream by the secondary separation.
　また、セパレートローラと、パッド取付面に取り付けた分離パッドをセパレートローラに圧接するパッドピースとを備え、セパレートローラの回転により該セパレートローラと分離パッドの圧接部を搬送される複数の用紙を分離する給紙装置の用紙分離機構に関する提案が例えば、特許文献２などになされている。特許文献２の用紙分離機構では、パッドピースのパッド取付面が湾曲面形状に形成されている。特許文献２の用紙分離機構は、パッドピースをセパレートローラの回転に伴い揺動可能となるように支持する揺動機構を備えている。また、揺動するパッドピースを、このパッドピースがセパレートローラの回転により揺動する方向と逆方向に付勢する第１の付勢手段を備えている。第１の付勢手段は、揺動機構で揺動して用紙搬送路の下流側に傾いたパッドピースの一端の下面を弾性力により付勢することで、パッドピースを用紙搬送路の上流側に傾く方向へ弾性力により付勢する。さらに、パッドピースを付勢して分離パッドをセパレートローラに圧接する第２の付勢手段を備えている。なお、第１の付勢手段及び第２の付勢手段は、パッドピースを弾性力により付勢するコイルスプリングであるとされている。 In addition, a separation roller and a pad piece that presses the separation pad attached to the pad mounting surface against the separation roller are provided, and a plurality of sheets conveyed through the separation roller and the pressure contact portion of the separation pad are separated by rotation of the separation roller. For example, Patent Document 2 proposes a paper separation mechanism of a paper feeding device. In the paper separation mechanism of Patent Document 2, the pad mounting surface of the pad piece is formed in a curved surface shape. The paper separation mechanism disclosed in Patent Document 2 includes a swing mechanism that supports the pad piece so that the pad piece can swing as the separate roller rotates. In addition, a first urging means for urging the oscillating pad piece in a direction opposite to the direction in which the pad piece oscillates by the rotation of the separation roller is provided. The first urging means urges the lower surface of one end of the pad piece that is rocked by the rocking mechanism and is inclined to the downstream side of the paper conveyance path by an elastic force, thereby causing the pad piece to be upstream of the paper conveyance path. It is biased by the elastic force in the direction of tilting. Further, a second urging means is provided to urge the pad piece and press the separation pad against the separation roller. The first urging means and the second urging means are coil springs that urge the pad piece with elastic force.
特開平１０－１８１９０６号公報Japanese Patent Laid-Open No. 10-181906 特開２００８－２４４９５号公報JP 2008-24495 A
　しかしながら、複数枚重なり合った原稿から一枚の原稿を分離する場合、特許文献１のような構成によれば、二個の付勢手段によって原稿が分離される位置が形成され、原稿を分離するための押圧力が各位置で原稿に作用する。そのため、各位置で原稿に作用する押圧力による原稿損傷の恐れが高くなる。また、特許文献２のような構成によれば、揺動機構に応じて第１の付勢手段の押圧方向を考慮する必要があり、機構が複雑になってしまうという問題点があった。 However, when separating a single document from a plurality of overlapping documents, according to the configuration of Patent Document 1, a position where the document is separated is formed by two urging means, and the document is separated. Is applied to the document at each position. Therefore, there is a high risk of document damage due to the pressing force acting on the document at each position. Further, according to the configuration as in Patent Document 2, it is necessary to consider the pressing direction of the first urging means according to the swing mechanism, and there is a problem that the mechanism becomes complicated.
　本発明は、上記の課題を解決して複数枚重なり合った原稿から一枚の原稿を好適に分離することが可能な新たな原稿分離機構を提供することを目的とする。 An object of the present invention is to provide a new document separation mechanism capable of solving the above-described problem and suitably separating one document from a plurality of stacked documents.
　上記従来の課題に鑑みなされた本発明の一側面は、複数枚重なり合った原稿から一枚の原稿を分離し、搬送する原稿分離機構であって、複数枚重なり合った原稿から第１原稿を分離し、分離された前記第１原稿を回転しながら搬送する分離ローラと、前記分離ローラの外周面に近接して配置され、前記分離ローラによって搬送される前記第１原稿に付着した第２原稿を、前記第１原稿から分離する分離片と、前記分離片を前記分離ローラの外周面側に付勢する第１付勢部と、前記分離片が前記第１付勢部による付勢に抗して前記第１付勢部による付勢方向と反対側に所定の位置を越えて後退した場合、前記第１付勢部で付勢されている前記分離片をさらに前記分離ローラの外周面側に付勢し、前記分離片が前記所定の位置より前記分離ローラの外周面側に前進した場合、前記分離片を付勢しない第２付勢部とを有することを特徴とする原稿分離機構である。 One aspect of the present invention made in view of the above-described conventional problems is a document separation mechanism that separates and transports a single document from a plurality of stacked documents, and separates a first document from a plurality of stacked documents. A separation roller that conveys the separated first document while rotating, and a second document that is disposed in proximity to the outer peripheral surface of the separation roller and adheres to the first document that is conveyed by the separation roller, A separation piece that separates the first document, a first urging portion that urges the separation piece toward the outer peripheral surface of the separation roller, and the separation piece resists urging by the first urging portion. When the first biasing portion moves backward beyond a predetermined position in the direction opposite to the biasing direction, the separation piece biased by the first biasing portion is further biased to the outer peripheral surface side of the separation roller. The separation piece is moved from the predetermined position to the separation row. If advanced to the outer circumferential surface of a document separating mechanism, characterized in that it comprises a second biasing portion does not bias the separation pad.
　これによれば、分離片の後退および前進にともない、分離片に作用させる付勢力を好適に変化させることができる。分離片と第２原稿との接触によって摩擦力が生じる。この摩擦力が、第１原稿と第２原稿との付着力および第２原稿同士の付着力と比較し大きい場合、分離片が抵抗となり、第１原稿から第２原稿を好適に分離することができる。しかし、第１原稿に付着した第２原稿が増加すると、分離片と第２原稿それぞれとの間の摩擦力より、第１原稿と第２原稿との付着力、第２原稿同士の付着力が大きくなり、確実な分離が行えなくなる。このような問題に対し、本発明の一側面のような構成によれば、第２原稿の枚数が多くなり、分離片の移動量が大きくなると、分離片に対する付勢力を増加させることができる。そのため、分離片と第２原稿との摩擦力を高めることが可能となり、分離片を第２原稿に対する抵抗として好適に機能させることができる。一方、第２原稿の枚数が少ない場合、第２付勢部による付勢は行われない。そのため、常に、分離ローラの外周面に向けて分離片が高い付勢力によって押圧されているといった状態を回避することができる。なお、分離ローラの外周面に近接して配置される分離片について、分離ローラと分離片とが近くにある状態を意味し、この近くにある状態には、両者が接触している状態が含まれる。 According to this, it is possible to suitably change the urging force that acts on the separation piece as the separation piece moves backward and forward. A frictional force is generated by the contact between the separation piece and the second original. When the frictional force is larger than the adhesion between the first document and the second document and the adhesion between the second documents, the separation piece becomes a resistance, and the second document can be preferably separated from the first document. it can. However, when the number of second documents attached to the first document increases, the adhesive force between the first document and the second document and the adhesion between the second documents due to the frictional force between the separating piece and the second document. It becomes large and reliable separation cannot be performed. With respect to such a problem, according to the configuration of one aspect of the present invention, when the number of second documents increases and the movement amount of the separation piece increases, the urging force against the separation piece can be increased. Therefore, it is possible to increase the frictional force between the separation piece and the second original, and the separation piece can be suitably functioned as a resistance against the second original. On the other hand, when the number of second documents is small, the second urging unit does not urge. Therefore, it is always possible to avoid a state in which the separation piece is pressed by a high urging force toward the outer peripheral surface of the separation roller. In addition, the separation piece arranged close to the outer peripheral surface of the separation roller means a state in which the separation roller and the separation piece are close to each other, and the state in the vicinity includes a state in which both are in contact with each other. It is.
　この原稿分離機構は、次のような構成とすることもできる。すなわち、前記第１付勢部と前記第２付勢部とは、前記付勢方向に弾性変形する弾性部材であって、前記第２付勢部は、前記付勢方向の長さが前記第１付勢部の前記付勢方向の長さより短く、前記第２付勢部は、前記第１付勢部の前記付勢方向と反対側への弾性変形量が、前記第１付勢部と前記第２付勢部との前記付勢方向の長さの差に基づいた量より大きくなり、前記分離片が前記所定の位置を越えて後退した場合、前記第１付勢部で付勢されている前記分離片をさらに前記分離ローラの外周面側に付勢し、前記第１付勢部の前記付勢方向と反対側への弾性変形量が、前記第１付勢部と前記第２付勢部との前記付勢方向の長さの差に基づいた量より小さくなり、前記分離片が前記所定の位置より前記分離ローラの外周面側に前進した場合、前記分離片を付勢しないことを特徴としてもよい。 This document separation mechanism can be configured as follows. That is, the first biasing portion and the second biasing portion are elastic members that are elastically deformed in the biasing direction, and the second biasing portion has a length in the biasing direction of the first biasing portion. The first urging portion is shorter than the length of the urging direction, and the second urging portion has an elastic deformation amount of the first urging portion opposite to the urging direction to the first urging portion. When the separation piece is retracted beyond the predetermined position when the separation piece is retracted beyond the predetermined position, the amount is urged by the first urging unit. The separation piece is further urged toward the outer peripheral surface side of the separation roller, and the amount of elastic deformation of the first urging portion in the direction opposite to the urging direction is the first urging portion and the second urging portion. When the separation piece is advanced from the predetermined position to the outer peripheral surface side of the separation roller, the amount is smaller than the amount based on the difference in length of the urging direction with the urging portion. It may be characterized not to urge the serial separation pad.
　これによれば、分離片の後退および前進にともない、分離片に作用させる付勢力を好適に変化させることができる。なお、前記第１付勢部と前記第２付勢部との前記付勢方向の長さの差に基づいた量は、第１付勢部と第２付勢部との付勢方向の長さの差に一致する量、即ち寸法の他、第１付勢部と第２付勢部との付勢方向の長さの差に一致する量から所定の一定値を減じた量、即ち寸法を含む。 According to this, it is possible to suitably change the urging force that acts on the separation piece as the separation piece moves backward and forward. The amount based on the difference in length in the biasing direction between the first biasing portion and the second biasing portion is the length in the biasing direction between the first biasing portion and the second biasing portion. In addition to the amount corresponding to the difference in height, that is, the size, the amount corresponding to the difference in length in the urging direction between the first urging portion and the second urging portion, the amount obtained by subtracting a predetermined constant value, that is, the size including.
　また、前記第１付勢部と前記第２付勢部とは、前記第２付勢部を一定量圧縮させるための力が前記第１付勢部を前記一定量圧縮させるための力以上となる関係を有することを特徴としてもよい。これによれば、分離片が所定の位置を越えて後退し場合、より大きな付勢力を分離片に作用させることができる。 Further, the first urging portion and the second urging portion are configured such that a force for compressing the second urging portion by a certain amount is equal to or greater than a force for compressing the first urging portion by the certain amount. It is good also as having the relationship which becomes. According to this, when the separation piece moves backward beyond a predetermined position, a larger urging force can be applied to the separation piece.
　また、前記分離片と前記第１付勢部との間に設けられた第１押圧板を有し、前記第１付勢部は、前記第１押圧板を介して前記分離片を付勢することを特徴としてもよい。これによれば、分離片を第１押圧板を形成する面で付勢することができる。 Moreover, it has the 1st press plate provided between the said separation piece and the said 1st urging | biasing part, and the said 1st urging | biasing part urges | biases the said separation piece via the said 1st press plate. This may be a feature. According to this, a separation piece can be urged | biased by the surface which forms a 1st press board.
　また、前記分離片の後退と前進とに対応した前記第１押圧板の移動をガイドする第１ガイド部を有することを特徴としてもよい。これによれば、第１押圧板の移動、すなわち後退と前進とを好適に行うことが可能で、分離片と第１押圧板とを好適に面接触させることができる。 Further, it may have a first guide portion that guides the movement of the first pressing plate corresponding to the backward and forward movement of the separation piece. According to this, the movement of the first pressing plate, that is, the backward movement and the forward movement can be suitably performed, and the separation piece and the first pressing plate can be preferably brought into surface contact.
　また、前記分離片と前記第２付勢部との間に設けられた第２押圧板を有し、前記第２付勢部は、前記第２押圧板を介して前記分離片を付勢することを特徴としてもよい。これによれば、分離片を第２押圧板を形成する面を介して付勢することができる。 Moreover, it has the 2nd press plate provided between the said separation piece and the said 2nd biasing part, and the said 2nd biasing part biases the said separation piece via the said 2nd press plate. This may be a feature. According to this, the separation piece can be urged via the surface forming the second pressing plate.
　また、前記分離片の後退と前進とに対応した前記第２押圧板の移動をガイドする第２ガイド部を有することを特徴としてもよい。これによれば、第２押圧板の移動、すなわち後退と前進とを好適に行うことができる。 Further, it may be characterized by having a second guide part for guiding the movement of the second pressing plate corresponding to the backward and forward movement of the separation piece. According to this, the movement of the second pressing plate, that is, the backward movement and the forward movement can be suitably performed.
　また、前記第２ガイド部には、前記所定の位置に、前記第２押圧板が前記分離ローラの外周面側に前進することを規制する規制部が形成されていることを特徴としてもよい。これによれば、第２付勢部による分離片の付勢を好適に解除させることができる。 Further, the second guide part may be formed with a restriction part for restricting the second pressing plate from moving forward to the outer peripheral surface side of the separation roller at the predetermined position. According to this, the urging | biasing of the separation piece by a 2nd urging | biasing part can be cancelled | released suitably.
また、前記原稿分離機構は、前記分離片と前記第１付勢部との間に設けられた第１押圧板を有し、前記第１付勢部は、前記第１押圧板を介して前記分離片を付勢し、前記原稿分離機構は、前記分離片と前記第２付勢部との間に設けられた第２押圧板を有し、前記第２付勢部は、前記第２押圧板を介して前記分離片を付勢し、前記所定の位置は、前記分離片が前記第１付勢部による付勢に抗して前記第１付勢部による付勢方向と反対側に後退したことにより前記第１押圧板と前記第２押圧板とが接することとなった前記分離片の前記付勢方向における位置であることを特徴としてもよい。これによれば、複数枚重なり合った原稿から一枚の原稿を好適に分離することが可能となる。 Further, the document separation mechanism includes a first pressing plate provided between the separation piece and the first urging portion, and the first urging portion is interposed between the first pressing plate and the first urging portion. The separation piece is urged, and the document separation mechanism has a second pressing plate provided between the separation piece and the second urging portion, and the second urging portion is the second pressing portion. The separation piece is urged through a plate, and the predetermined position moves backward in the direction opposite to the urging direction of the first urging portion against the urging force of the first urging portion. Thus, the first pressing plate and the second pressing plate may be in a position in the biasing direction of the separation piece. According to this, it is possible to suitably separate one original from a plurality of originals that overlap each other.
　また、前記第２付勢部のばね定数は、前記第１付勢部のばね定数以上であることを特徴としてもよい。これによれば、分離片が所定の位置を越えて後退し場合、より大きな付勢力を分離片に作用させることができる。 The spring constant of the second urging portion may be equal to or greater than the spring constant of the first urging portion. According to this, when the separation piece moves backward beyond a predetermined position, a larger urging force can be applied to the separation piece.
　本発明によれば、原稿の枚数に応じて分離片に作用させる付勢力を好適に変化させる機構を設けたため、複数枚重なり合った原稿から一枚の原稿を好適に分離することが可能な新たな原稿分離機構を得ることができる。また、原稿が少枚数の場合の分離片の分離ローラへの付勢力を弱く設定することができるため、分離片や分離ローラの過剰な摩耗を低減させることができる。 According to the present invention, since a mechanism for suitably changing the urging force applied to the separation piece according to the number of documents is provided, a new document capable of suitably separating a single document from a plurality of overlapping documents is provided. A document separation mechanism can be obtained. In addition, since the urging force of the separation piece to the separation roller when the number of documents is small can be set weak, excessive wear of the separation piece and the separation roller can be reduced.
スキャナ装置の外観を示す図である。It is a figure which shows the external appearance of a scanner apparatus. スキャナ装置の内部構成の概略を示す図である。It is a figure which shows the outline of an internal structure of a scanner apparatus. （ａ）は第１の実施形態の原稿分離機構を示す図であり、（ｂ）は図２（ａ）のＦ－Ｆ断面図であり、（ｃ）は図２（ａ）のＧ－Ｇ断面図である。2A is a view showing a document separating mechanism according to the first embodiment, FIG. 2B is a sectional view taken along line FF in FIG. 2A, and FIG. 2C is a sectional view taken along line GG in FIG. It is sectional drawing. （ａ）は第２の実施形態の原稿分離機構を示す図であり、（ｂ）は図３（ａ）のＨ－Ｈ断面図であり、（ｃ）は図３（ａ）のＩ－Ｉ断面図である。(A) is a view showing a document separating mechanism of the second embodiment, (b) is a cross-sectional view taken along line HH in FIG. 3 (a), and (c) is a cross-sectional view taken along II in FIG. 3 (a). It is sectional drawing. （ａ）は第３の実施形態の原稿分離機構を示す図であり、（ｂ）は図４（ａ）のＪ－Ｊ断面図であり、（ｃ）は図４（ａ）のＫ－Ｋ断面図である。(A) is a view showing a document separating mechanism of the third embodiment, (b) is a JJ sectional view of FIG. 4 (a), and (c) is a KK of FIG. 4 (a). It is sectional drawing. （ａ）は第４の実施形態の原稿分離機構を示す図であり、（ｂ）は図５（ａ）のＰ－Ｐ断面図であり、（ｃ）は図５（ａ）のＱ－Ｑ断面図である。(A) is a view showing a document separating mechanism of the fourth embodiment, (b) is a cross-sectional view taken along the line PP in FIG. 5 (a), and (c) is a QQ in FIG. 5 (a). It is sectional drawing. 他の原稿分離機構を示す図である。It is a figure which shows another original document separation mechanism.
　本発明を実施するための実施形態について、図面を用いて以下に詳細に説明する。本発明は、以下に記載の構成に限定されるものではなく、同一の技術的思想において種々の構成を採用することができる。例えば、以下に示す構成の一部は、省略しまたは他の構成などに置換してもよい。また、他の構成を含むようにしてもよい。 Embodiments for carrying out the present invention will be described below in detail with reference to the drawings. The present invention is not limited to the configurations described below, and various configurations can be employed in the same technical idea. For example, some of the configurations described below may be omitted or replaced with other configurations. Moreover, you may make it include another structure.
　本実施形態の原稿分離機構１００は、コピー機、プリンタまたはファクシミリ装置などに採用することができる。また、原稿分離機構１００は、図１に示すようなスキャナ装置２０に採用することができる。以下、原稿分離機構１００を有するスキャナ装置２０を例に説明する。 The document separation mechanism 100 of this embodiment can be employed in a copier, a printer, a facsimile machine, or the like. The document separation mechanism 100 can be employed in a scanner device 20 as shown in FIG. Hereinafter, the scanner device 20 having the document separation mechanism 100 will be described as an example.
　スキャナ装置２０は、図１Ａに示すような外観を有する。図１Ａに示すように、スキャナ装置２０は、給紙トレイ１３０と、排紙トレイ１８０とを有し、図１Ｂに示すように、その内部に原稿分離機構１００などを有する。給紙トレイ１３０には、読取対象の原稿３００がセットされる。給紙トレイ１３０には、例えば、原稿３００が複数枚重なり合った状態でセットされる。原稿分離機構１００は、給紙トレイ１３０にセットされた原稿３００を排紙トレイ１８０に搬送する。具体的には、原稿分離機構１００は、給紙トレイ１３０に複数枚重なり合った原稿３００を分離する。原稿分離機構１００の詳細な説明は、後述する。排紙トレイ１８０は、原稿分離機構１００により分離され、スキャナ装置２０内の所定のローラにより排紙された原稿３００を受ける。 The scanner device 20 has an appearance as shown in FIG. 1A. As shown in FIG. 1A, the scanner device 20 includes a paper feed tray 130 and a paper discharge tray 180. As shown in FIG. 1B, the scanner device 20 includes a document separation mechanism 100 therein. A document 300 to be read is set on the paper feed tray 130. For example, a plurality of documents 300 are set on the sheet feed tray 130 in an overlapping state. The document separation mechanism 100 conveys the document 300 set on the paper feed tray 130 to the paper discharge tray 180. Specifically, the document separation mechanism 100 separates a plurality of documents 300 that overlap each other on the paper feed tray 130. A detailed description of the document separation mechanism 100 will be described later. The paper discharge tray 180 receives the original 300 that is separated by the original separation mechanism 100 and discharged by a predetermined roller in the scanner device 20.
　そして、スキャナ装置２０は、その内部に図１Ｂに示すように、原稿分離機構１００と、ラインフィードローラ（以下、「ＬＦローラ」ともいう。）１４０と、画像読取部１５０Ａ，１５０Ｂと、排紙ローラ１６０と、ピンチローラ１７０Ａ，１７０Ｂとを有する。 As shown in FIG. 1B, the scanner device 20 includes a document separation mechanism 100, a line feed roller (hereinafter, also referred to as “LF roller”) 140, image reading units 150A and 150B, and paper discharge. It has a roller 160 and pinch rollers 170A and 170B.
　ＬＦローラ１４０は、原稿３００Ａを画像読取部１５０Ａ，１５０Ｂ側に搬送する。原稿３００Ａは、後述する原稿分離機構１００が有する分離ローラ１０２によって分離され搬送されてきた一枚の原稿である。ＬＦローラ１４０は、搬送される原稿３００Ａの一方の面の側に設置されている。ＬＦローラ１４０は、軸部１４２に支持されている。ピンチローラ１７０Ａは、搬送される原稿３００Ａの原稿面においてＬＦローラ１４０が配置される面とは異なる他方の面の側に配置される。つまり、ピンチローラ１７０Ａは、ＬＦローラ１４０に対向して設置されている。ピンチローラ１７０Ａは、軸部１７２Ａに支持され、ＬＦローラ１４０に従動して回転する。ＬＦローラ１４０とピンチローラ１７０Ａとは、分離ローラ１０２によって分離され搬送されてきた一枚の原稿３００Ａを挟持し、画像読取部１５０Ａ，１５０Ｂ側に搬送する。この搬送は、原稿３００Ａが挟持された状態で、ＬＦローラ１４０を支持した軸部１４２がモータなどの回転駆動機構によって回転し、これにともないＬＦローラ１４０が回転して実現される。この際、ピンチローラ１７０Ａは、ＬＦローラ１４０に従動して回転する。なお、図１ＢのＬＦローラ１４０およびピンチローラ１７０Ａ内に記載の矢印は、ＬＦローラ１４０およびピンチローラ１７０Ａの回転方向を示すものである。 The LF roller 140 conveys the original 300A to the image reading units 150A and 150B. The document 300A is a single document that has been separated and conveyed by a separation roller 102 included in a document separation mechanism 100 described later. The LF roller 140 is installed on one side of the conveyed document 300A. The LF roller 140 is supported by the shaft portion 142. The pinch roller 170A is arranged on the other surface side different from the surface on which the LF roller 140 is arranged on the original surface of the conveyed original 300A. That is, the pinch roller 170A is disposed to face the LF roller 140. The pinch roller 170A is supported by the shaft portion 172A, and rotates following the LF roller 140. The LF roller 140 and the pinch roller 170A sandwich the single document 300A that has been separated and conveyed by the separation roller 102 and convey it to the image reading units 150A and 150B. This conveyance is realized by rotating the shaft portion 142 supporting the LF roller 140 by a rotation driving mechanism such as a motor and the LF roller 140 in accordance with the rotation of the document 300A. At this time, the pinch roller 170A rotates following the LF roller 140. Note that the arrows in the LF roller 140 and the pinch roller 170A in FIG. 1B indicate the rotation directions of the LF roller 140 and the pinch roller 170A.
　画像読取部１５０Ａ，１５０Ｂは、搬送されてきた原稿３００Ａに記録されている画像を読み取る。画像読取部１５０Ａ，１５０Ｂは、例えばＣＩＳ（Contact Image Sensor）を含む。なお、ＣＣＤ（Charged Coupled Device）としてもよい。画像読取部１５０Ａは、搬送されてきた原稿３００Ａの一方の面の側に設けられ、この他方の面、例えば表面を読み取る。画像読取部１５０Ｂは搬送されてきた原稿３００Ａの一方の面の側に設けられ、この一方の面、例えば裏面を読み取る。スキャナ装置２０では、画像読取部１５０Ａ，１５０Ｂによって両面読取機能が実現される。 The image reading units 150A and 150B read an image recorded on the conveyed document 300A. The image reading units 150A and 150B include, for example, a CIS (Contact Image Sensor). A CCD (ChargedCharCoupled Device) may be used. The image reading unit 150A is provided on one side of the conveyed document 300A and reads the other side, for example, the front side. The image reading unit 150B is provided on one side of the conveyed document 300A, and reads one side, for example, the back side. In the scanner device 20, a double-sided reading function is realized by the image reading units 150A and 150B.
　排紙ローラ１６０は、画像読取部１５０Ａ，１５０Ｂを通過して搬送されてきた一枚の原稿３００Ａを、搬送方向の下流側に搬送する。つまり、排紙ローラ１６０は、搬送されてきた原稿３００Ａを、搬送方向の下流側に設置されている排紙トレイ１８０側に搬送する。排紙ローラ１６０は、搬送される原稿３００Ａの一方の面の側に設置されている。排紙ローラ１６０は、軸部１６２に支持されている。ピンチローラ１７０Ｂは、搬送される原稿３００Ａの原稿面において排紙ローラ１６０が配置される面とは異なる他方の面の側で配置される。つまり、ピンチローラ１７０Ｂは、排紙ローラ１６０に対向して設置されている。ピンチローラ１７０Ｂは、軸部１７２Ｂに支持され、排紙ローラ１６０に従動して回転する。排紙ローラ１６０とピンチローラ１７０Ｂとは、画像読取部１５０Ａ，１５０Ｂを通過して搬送されてきた一枚の原稿３００Ａを挟持し、排紙トレイ１８０側に搬送する。この搬送は、原稿３００Ａが挟持された状態で、排紙ローラ１６０を支持した軸部１６２がモータなどの回転駆動機構によって回転し、これにともない排紙ローラ１６０が回転して実現される。この際、ピンチローラ１７０Ｂは、排紙ローラ１６０に従動して回転する。なお、図１Ｂの排紙ローラ１６０およびピンチローラ１７０Ｂ内に記載の矢印は、排紙ローラ１６０およびピンチローラ１７０Ｂの回転方向を示すものである。 The paper discharge roller 160 conveys the single original 300A conveyed through the image reading units 150A and 150B to the downstream side in the conveying direction. That is, the paper discharge roller 160 conveys the conveyed document 300A to the paper discharge tray 180 installed on the downstream side in the conveyance direction. The paper discharge roller 160 is disposed on one side of the conveyed document 300A. The paper discharge roller 160 is supported by the shaft portion 162. The pinch roller 170B is arranged on the other side of the original surface of the conveyed document 300A, which is different from the surface on which the paper discharge roller 160 is arranged. That is, the pinch roller 170B is disposed to face the paper discharge roller 160. The pinch roller 170 </ b> B is supported by the shaft portion 172 </ b> B and rotates following the paper discharge roller 160. The paper discharge roller 160 and the pinch roller 170B sandwich the single document 300A conveyed through the image reading units 150A and 150B and convey it to the paper discharge tray 180 side. This conveyance is realized by rotating the shaft portion 162 supporting the paper discharge roller 160 by a rotation driving mechanism such as a motor in the state where the document 300A is held, and rotating the paper discharge roller 160 accordingly. At this time, the pinch roller 170 </ b> B rotates following the paper discharge roller 160. Note that the arrows in the paper discharge roller 160 and the pinch roller 170B in FIG. 1B indicate the rotation directions of the paper discharge roller 160 and the pinch roller 170B.
　排紙トレイ１８０は、排紙ローラ１６０とピンチローラ１７０Ｂとによって搬送され、排出された原稿３００Ａを受ける。これによって原稿３００Ａの読取動作が終了する。給紙トレイ１３０に複数枚の原稿３００がセットされている場合、原稿分離機構１００によって既に搬送された原稿３００Ａとは異なる原稿３００が順次連続して搬送される。順次搬送される原稿３００に記録された画像が読み取られる。そして、順次、排紙トレイ１８０に排出される。排出された原稿３００は、排紙トレイ１８０に積層される。なお、図１Ａに示すスキャナ装置２０は、排紙トレイ１８０が収納された状態にある。スキャナ装置２０において、上述した読取動作が実行される場合、排紙トレイ１８０は、図１Ａに示す引出方向に引き出され、伸長した状態で利用される。 The paper discharge tray 180 is conveyed by the paper discharge roller 160 and the pinch roller 170B and receives the discharged original 300A. Thereby, the reading operation of the document 300A is completed. When a plurality of documents 300 are set on the sheet feed tray 130, documents 300 different from the document 300 </ b> A already transported by the document separation mechanism 100 are sequentially transported. An image recorded on the document 300 conveyed sequentially is read. Then, the paper is sequentially discharged to the paper discharge tray 180. The discharged original 300 is stacked on the paper discharge tray 180. The scanner device 20 shown in FIG. 1A is in a state in which the paper discharge tray 180 is stored. In the scanner device 20, when the above-described reading operation is executed, the paper discharge tray 180 is pulled out in the pull-out direction shown in FIG. 1A and used in an extended state.
　次に、図１Ｂにその概略を示す原稿分離機構１００について、第１の実施形態～第５の実施形態を説明する。なお、以下では、同一または同様の構成には共通した符号を付して説明する。原稿分離機構１００との記載は、例えば以下に示す原稿分離機構１００Ａ，１００Ｂ，１００Ｃ，１００Ｄを総称するものである。 Next, the first to fifth embodiments of the document separation mechanism 100 schematically shown in FIG. 1B will be described. In the following description, the same or similar components are described with common reference numerals. The description of the document separation mechanism 100 is a general term for the following document separation mechanisms 100A, 100B, 100C, and 100D.
　（第１の実施形態）
　第１の実施形態の原稿分離機構１００Ａは、図２（ａ）～（ｃ）に示すように分離ローラ１０２と分離片１０４と第１付勢部１０６と第１押圧板１０８と第２付勢部１１０と第２押圧板１１２とを有する。原稿分離機構１００Ａにおいて、第１付勢部１０６と第１押圧板１０８と第２付勢部１１０と第２押圧板１１２とは、分離片１０４と蓋２４との間の空間に設置されている。原稿分離機構１００Ａは、積載される原稿３００から原稿３００Ａを分離する。原稿３００Ｂは、図２（ａ）に示すように給紙トレイ１３０にセットされた原稿３００のうち、分離ローラ１０２と原稿３００Ａとが接する面とは異なる他方の面側の原稿である。つまり、原稿３００Ｂは、原稿３００Ａが分離された以降に、原稿分離機構１００Ａにより分離される原稿である。 (First embodiment)
As shown in FIGS. 2A to 2C, the document separation mechanism 100A according to the first embodiment includes a separation roller 102, a separation piece 104, a first urging portion 106, a first pressing plate 108, and a second urging force. Part 110 and second pressing plate 112. In the document separation mechanism 100 </ b> A, the first urging unit 106, the first pressing plate 108, the second urging unit 110, and the second pressing plate 112 are installed in a space between the separation piece 104 and the lid 24. . The document separation mechanism 100A separates the document 300A from the loaded document 300. The document 300B is a document on the other side of the document 300 set on the paper feed tray 130 as shown in FIG. 2A, which is different from the surface where the separation roller 102 and the document 300A are in contact. That is, the document 300B is a document that is separated by the document separation mechanism 100A after the document 300A is separated.
　分離ローラ１０２は、上述したＬＦローラ１４０および排紙ローラ１６０などと同一の側で軸部１１４に支持される。軸部１１４はモータなどの回転駆動機構に連結されている。回転駆動機構が駆動しこれにともない軸部１１４が回転すると、分離ローラ１０２も、図１Ｂの分離ローラ１０２内に記載の矢印の方向に回転する。回転しながら分離ローラ１０２は、給紙トレイ１３０に複数枚重なり合った状態でセットされた原稿３００から、最も下側で分離ローラ１０２に接した位置にセットされている１枚の原稿３００Ａを分離する。分離ローラ１０２だけでは、１枚の原稿３００Ａのみを分離できない場合がある。この場合、分離したい原稿３００Ａに、１枚または複数枚の原稿３００Ｂが付着した状態で分離される。そして、分離ローラ１０２は、分離された原稿３００Ａを回転方向よって決定付けられる方向、即ち搬送方向に搬送する。すなわちＬＦローラ１４０側に搬送する。分離ローラ１０２の外周面は、エチレンプロピレンゴム（ＥＰＤＭ）やシリコンゴムなどのゴムなどによって形成されている。 The separation roller 102 is supported by the shaft 114 on the same side as the LF roller 140 and the discharge roller 160 described above. The shaft portion 114 is connected to a rotational drive mechanism such as a motor. When the rotation drive mechanism is driven and the shaft portion 114 is rotated accordingly, the separation roller 102 is also rotated in the direction of the arrow described in the separation roller 102 in FIG. 1B. While rotating, the separation roller 102 separates the single document 300A set at the lowest position in contact with the separation roller 102 from the document 300 set in a state of being overlapped on the paper feed tray 130. . Only the separation roller 102 may not be able to separate only one original 300A. In this case, the original 300A to be separated is separated with one or more originals 300B attached thereto. The separation roller 102 conveys the separated document 300A in the direction determined by the rotation direction, that is, the conveyance direction. That is, it is conveyed to the LF roller 140 side. The outer peripheral surface of the separation roller 102 is formed of rubber such as ethylene propylene rubber (EPDM) or silicon rubber.
　分離片１０４は、分離ローラ１０２の外周面に近接して配置される。具体的に、分離片１０４は、図１Ｂに示すように、その先端部が分離ローラ１０２の外周面側に近接して配置されている。そして、先端部と反対側の後端部が、蓋２４側の所定の位置に取り付けられている。分離片１０４は、弾性変形可能な弾性部材、例えばゴムによって形成されている。分離片１０４は、分離ローラ１０２によって搬送される原稿３００Ａに付着した一枚または複数枚の原稿３００Ｂとの間で摩擦力を生じさせる。そして、この摩擦力が抵抗となって原稿３００Ｂを、原稿３００Ａから分離する。原稿３００Ｂが分離された原稿３００Ａは、分離ローラ１０２と分離片１０４との間を通過し、上述したとおり分離ローラ１０２の回転に応じてＬＦローラ１４０側に搬送される。なお、近接した状態とは、接触した状態を含む。 The separation piece 104 is disposed close to the outer peripheral surface of the separation roller 102. Specifically, as shown in FIG. 1B, the separation piece 104 is arranged such that its tip end is close to the outer peripheral surface side of the separation roller 102. And the rear end part on the opposite side to the front end part is attached to a predetermined position on the lid 24 side. The separation piece 104 is formed of an elastic member that can be elastically deformed, for example, rubber. The separation piece 104 generates a frictional force between one or a plurality of documents 300B attached to the document 300A conveyed by the separation roller 102. The frictional force acts as a resistance to separate the document 300B from the document 300A. The original 300A from which the original 300B has been separated passes between the separation roller 102 and the separation piece 104, and is conveyed to the LF roller 140 side according to the rotation of the separation roller 102 as described above. The close state includes a contact state.
　第１付勢部１０６と第２付勢部１１０とは、弾性部材によって形成されている。第１付勢部１０６と第２付勢部１１０とは、同じ大きさの力が作用した場合、第１付勢部１０６の圧縮量は第２付勢部１１０圧縮量以上となる関係を有する。具体的に、図２に示す原稿分離機構１００Ａでは、第１付勢部１０６と第２付勢部１１０とは、コイルばねによって形成されており、第２付勢部１１０のばね定数は、第１付勢部１０６のばね定数以上に設定されている。第１押圧板１０８と第２押圧板１１２とは、所定の剛性を有する樹脂などの剛体によって形成されている。 The first urging portion 106 and the second urging portion 110 are formed of an elastic member. The first urging unit 106 and the second urging unit 110 have a relationship in which the compression amount of the first urging unit 106 is equal to or greater than the compression amount of the second urging unit 110 when the same force is applied. . Specifically, in the document separating mechanism 100A shown in FIG. 2, the first urging unit 106 and the second urging unit 110 are formed by coil springs, and the spring constant of the second urging unit 110 is the first constant. It is set to be equal to or greater than the spring constant of one urging portion 106. The first pressing plate 108 and the second pressing plate 112 are formed of a rigid body such as a resin having a predetermined rigidity.
　第１付勢部１０６の一端は、第１押圧板１０８に接し、他端は蓋２４の所定の位置に設置されている。第１押圧板１０８の第１付勢部１０６が接する一方側の面は、さらに第２押圧板１１２と隙間ｔだけ離れた状態で対向している。第１押圧板１０８の一方側の面と反対側の他方の面は、分離片１０４と面接触している。 One end of the first urging portion 106 is in contact with the first pressing plate 108, and the other end is installed at a predetermined position of the lid 24. One surface of the first pressing plate 108 on which the first urging portion 106 is in contact is further opposed to the second pressing plate 112 with a gap t. The other surface opposite to the one surface of the first pressing plate 108 is in surface contact with the separation piece 104.
　第２付勢部１１０の一端は、第２押圧板１１２の第１押圧板１０８と対向した面と反対側の面に接し、他端が第１付勢部１０６と同じく、蓋２４の所定の位置に設置されている。第２付勢部１１０のコイル内径は、第１付勢部１０６のコイル外径より大きく設定されている。第１付勢部１０６は第２付勢部１１０内に収容される。第２押圧板１１２には、貫通孔１２２が形成される。形成された貫通孔１２２を通過して、第１付勢部１０６は、第２付勢部１１０内に収容される。そして、第１付勢部１０６は、図２に一点鎖線により示す軸上に沿って第２付勢部１１０内に収容される。 One end of the second urging portion 110 is in contact with the surface of the second pressing plate 112 opposite to the surface facing the first pressing plate 108, and the other end is the same as the first urging portion 106 and has a predetermined In place. The coil inner diameter of the second urging unit 110 is set larger than the coil outer diameter of the first urging unit 106. The first urging unit 106 is accommodated in the second urging unit 110. A through hole 122 is formed in the second pressing plate 112. The first urging portion 106 is accommodated in the second urging portion 110 through the formed through hole 122. And the 1st energizing part 106 is accommodated in the 2nd energizing part 110 along the axis | shaft shown with a dashed-dotted line in FIG.
　第１付勢部１０６は、第１押圧板１０８を介して分離片１０４を、分離ローラ１０２の外周面側に付勢する。例えば、原稿３００Ｂが複数枚付着した状態で原稿３００Ａが分離ローラ１０２により分離された場合、原稿３００Ａと複数枚の原稿３００Ｂとが一度に、分離ローラ１０２と分離片１０４との間に進入する。このような場合、分離片１０４は、付勢方向と反対方向に押される。分離片１０４が付勢方向と反対方向に押されると、第１押圧板１０８が後退し、第１付勢部１０６がそれに対応して圧縮される。原稿３００Ａなどによって分離片１０４が、付勢方向と反対方向に押されていない状態で、第１押圧板１０８が配置されている位置を通常位置とする。第１付勢部１０６の圧縮量、即ち弾性変形量が隙間ｔとなり、通常位置から隙間ｔだけ後退すると、第１押圧板１０８と第２押圧板１１２とが接する。具体的に、第１押圧板１０８と第２押圧板１１２とが面接触する。以下、第１押圧板１０８と第２押圧板１１２とが接することとなった分離片１０４の位置を、基準位置ともいう。 The first urging unit 106 urges the separation piece 104 to the outer peripheral surface side of the separation roller 102 via the first pressing plate 108. For example, when the document 300A is separated by the separation roller 102 with a plurality of documents 300B attached, the document 300A and the plurality of documents 300B enter between the separation roller 102 and the separation piece 104 at a time. In such a case, the separation piece 104 is pushed in the direction opposite to the biasing direction. When the separation piece 104 is pushed in the direction opposite to the urging direction, the first pressing plate 108 moves backward, and the first urging portion 106 is compressed correspondingly. The position where the first pressing plate 108 is disposed in a state where the separation piece 104 is not pressed in the direction opposite to the urging direction by the document 300A or the like is set as a normal position. When the compression amount of the first urging portion 106, that is, the amount of elastic deformation becomes the gap t, and when the first urging portion 106 moves backward from the normal position by the gap t, the first pressing plate 108 and the second pressing plate 112 come into contact with each other. Specifically, the first pressing plate 108 and the second pressing plate 112 are in surface contact. Hereinafter, the position of the separation piece 104 where the first pressing plate 108 and the second pressing plate 112 are in contact with each other is also referred to as a reference position.
　その後、分離片１０４が基準位置を越えて、さらに後退すると、第２付勢部１１０も第１押圧板１０８により圧縮されることになる。第１押圧板１０８により圧縮されることで、第２付勢部１１０による付勢力が発生する。したがって、第２付勢部１１０によっても、分離片１０４は、第２押圧板１１２および第１押圧板１０８を介して分離ローラ１０２の外周面側に付勢されることとなる。すなわち、分離片１０４は、基準位置を越えて、さらに後退すると、第１付勢部１０６と第２付勢部１１０とによって分離ローラ１０２の外周面側に付勢される。 Thereafter, when the separating piece 104 further moves backward beyond the reference position, the second urging portion 110 is also compressed by the first pressing plate 108. By being compressed by the first pressing plate 108, an urging force is generated by the second urging unit 110. Therefore, the separation piece 104 is also urged to the outer peripheral surface side of the separation roller 102 via the second pressing plate 112 and the first pressing plate 108 by the second urging unit 110. That is, when the separation piece 104 further moves backward beyond the reference position, it is urged toward the outer peripheral surface side of the separation roller 102 by the first urging portion 106 and the second urging portion 110.
　ここで、隙間ｔは、第１付勢部１０６と第２付勢部１１０との付勢方向の長さの差ｓに基づいた量である。すなわち、第１付勢部１０６の通常位置における付勢方向の長さＬ１と第２付勢部１１０との付勢方向の長さ、即ち全長Ｌ２の差ｓから第２押圧板１１２の厚みｕを差し引いた量、即ち寸法である。 Here, the gap t is an amount based on a difference s in length between the first urging unit 106 and the second urging unit 110 in the urging direction. That is, the thickness u of the second pressing plate 112 from the difference s between the length L1 in the biasing direction at the normal position of the first biasing portion 106 and the length in the biasing direction between the second biasing portion 110, that is, the total length L2. Is the amount minus dimensions.
　原稿３００の読取動作が順次連続して行われ、新たに分離ローラ１０２に接することとなった原稿３００Ａが順次搬送され続けると、給紙トレイ１３０にセットされた原稿３００の枚数が減少する。原稿３００の枚数が減少すると、分離ローラ１０２と分離片１０４との間に進入する原稿３００Ｂの枚数も減少し、付勢方向と反対側の方向に分離片１０４を押す力が小さくなる。これにともない、第１付勢部１０６と第２付勢部１１０との圧縮量が小さくなる。 When the reading operation of the document 300 is sequentially performed continuously and the document 300A newly coming into contact with the separation roller 102 is continuously conveyed, the number of documents 300 set on the sheet feeding tray 130 is reduced. When the number of documents 300 decreases, the number of documents 300B entering between the separation roller 102 and the separation piece 104 also decreases, and the force pushing the separation piece 104 in the direction opposite to the urging direction becomes smaller. Accordingly, the amount of compression between the first urging unit 106 and the second urging unit 110 is reduced.
　第１付勢部１０６と第２付勢部１１０との圧縮量が小さくなり、分離片１０４が前進し基準位置に到達すると、第２付勢部１１０の圧縮量は０となり、第２付勢部１１０による分離片１０４の付勢は解除される。さらに、原稿３００の枚数が減少すると、分離片１０４は、第１付勢部１０６による付勢によって分離ローラ１０２の外周面側に前進する。分離片１０４が基準位置より分離ローラ１０２の外周面側に前進した場合、第２付勢部１１０は分離片１０４を付勢しなくなる。原稿分離機構１００Ａで隙間ｔは、種々の点が考慮され決定される。決定された隙間ｔは、例えば第２付勢部１１０の全長Ｌ２および／または第２押圧板１１２の厚みｕを調整して確保される。 When the compression amount of the first urging unit 106 and the second urging unit 110 decreases and the separation piece 104 moves forward and reaches the reference position, the compression amount of the second urging unit 110 becomes 0, and the second urging unit The urging | biasing of the separation piece 104 by the part 110 is cancelled | released. Further, when the number of documents 300 decreases, the separation piece 104 advances toward the outer peripheral surface side of the separation roller 102 by the urging by the first urging unit 106. When the separation piece 104 advances from the reference position to the outer peripheral surface side of the separation roller 102, the second urging unit 110 does not urge the separation piece 104. The gap t in the document separation mechanism 100A is determined in consideration of various points. The determined gap t is ensured by adjusting, for example, the total length L2 of the second urging portion 110 and / or the thickness u of the second pressing plate 112.
　原稿分離機構１００Ａでは、分離片１０４と第１押圧板１０８と第２押圧板１１２とが、それぞれ面接触するため、分離片１０４と分離ローラ１０２との間に存在する原稿３００Ｂの枚数に応じて、分離片１０４により付勢される力を変更することができる。原稿３００Ｂの枚数が多い場合、分離片１０４により原稿３００Ａを正確に分離するためには、分離片１０４による付勢される力を大きくする必要がある。本実施形態では、原稿３００Ｂの枚数が多くなると、第２付勢部１１０により分離片１０４が付勢されるため、分離片１０４により確実に１枚の原稿３００Ａを分離することができる。 In the document separation mechanism 100A, the separation piece 104, the first pressing plate 108, and the second pressing plate 112 are in surface contact with each other, and therefore, according to the number of documents 300B existing between the separation piece 104 and the separation roller 102. The force urged by the separation piece 104 can be changed. When the number of documents 300 </ b> B is large, in order to accurately separate the document 300 </ b> A by the separation piece 104, it is necessary to increase the force urged by the separation piece 104. In the present embodiment, when the number of documents 300B increases, the separation piece 104 is urged by the second urging unit 110, so that one document 300A can be reliably separated by the separation piece 104.
　（第２の実施形態）
　第２の実施形態の原稿分離機構１００Ｂは、図３（ａ）～（ｃ）に示すように分離ローラ１０２と分離片１０４と第１付勢部１０６と第１押圧板１０８と第２付勢部１１０と第２押圧板１１２とを有する。原稿分離機構１００Ｂは、さらに、第１ガイド部１１６と第２ガイド部１１８とを有する。第２ガイド部１１８には、規制部１２０が形成されている。なお、原稿分離機構１００Ｂが有する分離ローラ１０２と分離片１０４と第１付勢部１０６と第１押圧板１０８と第２付勢部１１０と第２押圧板１１２とは、第１の実施形態の原稿分離機構１００Ａを例に説明したとおりである。これらについての詳細な説明は省略する。 (Second Embodiment)
As shown in FIGS. 3A to 3C, the document separation mechanism 100B of the second embodiment includes a separation roller 102, a separation piece 104, a first urging portion 106, a first pressing plate 108, and a second urging force. Part 110 and second pressing plate 112. The document separation mechanism 100B further includes a first guide unit 116 and a second guide unit 118. The second guide part 118 is formed with a restriction part 120. The separation roller 102, the separation piece 104, the first urging unit 106, the first pressing plate 108, the second urging unit 110, and the second pressing plate 112 included in the document separation mechanism 100B are the same as those in the first embodiment. The document separation mechanism 100A has been described as an example. Detailed description thereof will be omitted.
　第１ガイド部１１６は、分離片１０４の後退と前進とに対応した第１押圧板１０８の移動をガイドする。第２ガイド部１１８は、分離片１０４の後退と前進とに対応した第２押圧板１１２の移動をガイドする。規制部１２０は、第２押圧板１１２が分離ローラ１０２の外周面側に前進することを規制するものであって、基準位置に形成されている。 The first guide portion 116 guides the movement of the first pressing plate 108 corresponding to the backward and forward movement of the separation piece 104. The second guide portion 118 guides the movement of the second pressing plate 112 corresponding to the backward and forward movement of the separation piece 104. The restricting portion 120 restricts the second pressing plate 112 from moving forward to the outer peripheral surface side of the separation roller 102 and is formed at a reference position.
　第１ガイド部１１６と第２ガイド部１１８とは一体で形成されている。第１ガイド部１１６と第２ガイド部１１８とが一体で形成された部材は、蓋２４の所定の位置に設置されている。そして、この部材は、付勢方向と同じく分離ローラ１０２側に向けて突出した状態で、分離片１０４に対向して設置されている。第１押圧板１０８は、その外周側面が第１ガイド部１１６の内周面Ｍと所定の僅かな隙間ｖを介して嵌合されている。第１押圧板１０８は、第１ガイド部１１６の内周面Ｍに沿って移動する。第２押圧板１１２は、その外周側面が第２ガイド部１１８の内周面Ｎと所定の僅かな隙間ｗを介して嵌合されている。第２押圧板１１２は、第２ガイド部１１８の内周面Ｎに沿って移動する。 The first guide part 116 and the second guide part 118 are integrally formed. A member in which the first guide portion 116 and the second guide portion 118 are integrally formed is installed at a predetermined position of the lid 24. And this member is installed facing the separation piece 104 in the state which protruded toward the separation roller 102 side like the urging | biasing direction. The outer peripheral side surface of the first pressing plate 108 is fitted to the inner peripheral surface M of the first guide portion 116 via a predetermined slight gap v. The first pressing plate 108 moves along the inner peripheral surface M of the first guide portion 116. The outer peripheral side surface of the second pressing plate 112 is fitted to the inner peripheral surface N of the second guide portion 118 via a predetermined slight gap w. The second pressing plate 112 moves along the inner peripheral surface N of the second guide portion 118.
　第１ガイド部１１６の内周面Ｍ間の寸法ｍは、第２ガイド部１１８の内周面Ｎ間の寸法ｎより小さく設定されている。第２ガイド部１１８には、第１ガイド部１１６の内周面Ｍ間の寸法ｍおよび第２ガイド部１１８の内周面Ｎ間の寸法ｎが相違することに起因した段部が形成されている。原稿分離機構１００Ｂでは、第２押圧板１１２について、第２ガイド部１１８の内周面Ｎ間方向の寸法が、寸法ｍより大きく設定されている。そのため、この段部は、第２押圧板１１２の付勢方向の移動に関し、規制部１２０として機能する。 The dimension m between the inner peripheral surfaces M of the first guide part 116 is set smaller than the dimension n between the inner peripheral surfaces N of the second guide part 118. The second guide portion 118 is formed with a step portion resulting from the difference between the dimension m between the inner peripheral surfaces M of the first guide portion 116 and the dimension n between the inner peripheral surfaces N of the second guide portion 118. Yes. In the document separation mechanism 100B, the dimension of the second pressing plate 112 in the direction between the inner peripheral surfaces N of the second guide portion 118 is set to be larger than the dimension m. Therefore, this step portion functions as the restriction portion 120 with respect to the movement of the second pressing plate 112 in the urging direction.
　分離片１０４が、原稿３００Ａなどによって押されていない状態において、第１押圧板１０８と第２押圧板１１２とは、隙間ｔだけ離れた状態で対向するように設置されている。原稿分離機構１００Ｂで隙間ｔは、例えば規制部１２０が形成される位置を調整して設定される。 In a state where the separation piece 104 is not pressed by the original 300A or the like, the first pressing plate 108 and the second pressing plate 112 are installed to face each other with a gap t. For example, the gap t in the document separation mechanism 100B is set by adjusting the position where the restricting portion 120 is formed.
　例えば、第１の実施形態の場合と同様に、原稿３００Ａと複数枚の原稿３００Ｂとが一度に、分離ローラ１０２と分離片１０４との間に進入した場合、分離片１０４が、付勢方向と反対方向に押される。分離片１０４が付勢方向と反対方向に押されると、第１押圧板１０８が第１ガイド部１１６の内周面Ｍに沿って後退し、第１付勢部１０６がそれに対応して圧縮される。第１付勢部１０６の圧縮量が隙間ｔとなり、通常位置から隙間ｔだけ後退すると、第１押圧板１０８と第２押圧板１１２とが接する。具体的に、第１押圧板１０８と第２押圧板１１２とが面接触する。その後、分離片１０４が基準位置を越えて、さらに後退すると、第２押圧板１１２が第２ガイド部１１８の内周面Ｎに沿って後退する。そして、第２付勢部１１０も第１押圧板１０８により圧縮されることになる。第１押圧板１０８により圧縮されることで、第２付勢部１１０による付勢力が発生する。したがって、分離片１０４は、基準位置を越えて、さらに後退すると、第１付勢部１０６と第２付勢部１１０とによって分離ローラ１０２の外周面側に付勢される。 For example, as in the case of the first embodiment, when the document 300A and the plurality of documents 300B enter between the separation roller 102 and the separation piece 104 at a time, the separation piece 104 is set in the urging direction. Pushed in the opposite direction. When the separation piece 104 is pushed in the direction opposite to the urging direction, the first pressing plate 108 moves backward along the inner peripheral surface M of the first guide portion 116, and the first urging portion 106 is compressed correspondingly. The When the amount of compression of the first urging portion 106 becomes the gap t and retreats by the gap t from the normal position, the first pressing plate 108 and the second pressing plate 112 come into contact with each other. Specifically, the first pressing plate 108 and the second pressing plate 112 are in surface contact. Thereafter, when the separation piece 104 further moves back beyond the reference position, the second pressing plate 112 moves back along the inner peripheral surface N of the second guide portion 118. The second urging unit 110 is also compressed by the first pressing plate 108. By being compressed by the first pressing plate 108, an urging force is generated by the second urging unit 110. Accordingly, when the separation piece 104 further moves backward beyond the reference position, the separation piece 104 is urged toward the outer peripheral surface side of the separation roller 102 by the first urging unit 106 and the second urging unit 110.
　これに対し、給紙トレイ１３０にセットされた原稿３００の枚数が減少すると、第１付勢部１０６と第２付勢部１１０との圧縮量が小さくなり、分離片１０４が前進する。分離片１０４が前進し基準位置に到達すると、第２押圧板１１２の外周部分が規制部１２０に接する。規制部１２０に接した第２押圧板１１２は、第２付勢部１１０から付勢されたとしても、これ以上、分離ローラ１０２の外周面側に前進しない。これによって、第２付勢部１１０による分離片１０４の付勢は解除される。 On the other hand, when the number of documents 300 set on the paper feed tray 130 decreases, the compression amount of the first urging unit 106 and the second urging unit 110 decreases, and the separation piece 104 advances. When the separation piece 104 moves forward and reaches the reference position, the outer peripheral portion of the second pressing plate 112 comes into contact with the restricting portion 120. Even if the second pressing plate 112 in contact with the restricting portion 120 is urged by the second urging portion 110, it does not advance further to the outer peripheral surface side of the separation roller 102. Thereby, the urging | biasing of the separation piece 104 by the 2nd urging | biasing part 110 is cancelled | released.
　原稿分離機構１００Ｂにおいて実現される動作などは、第１の実施形態の原稿分離機構１００Ａと同様である。したがって、原稿分離機構１００Ｂによっても、原稿分離機構１００Ａと同様の機能が実現される。さらに、原稿分離機構１００Ｂでは、第１押圧板１０８と第２押圧板１１２とが、それぞれ第１ガイド部１１６と第２ガイド部１１８とによってガイドされた状態で移動するため、分離片１０４と第１押圧板１０８と第２押圧板１１２とを好適に面接触させることができる。 The operation realized in the document separation mechanism 100B is the same as that of the document separation mechanism 100A of the first embodiment. Therefore, the same function as that of the document separation mechanism 100A is realized by the document separation mechanism 100B. Further, in the document separation mechanism 100B, the first pressing plate 108 and the second pressing plate 112 move while being guided by the first guide portion 116 and the second guide portion 118, respectively. The first pressing plate 108 and the second pressing plate 112 can be preferably brought into surface contact.
　（第３の実施形態）
　第３の実施形態の原稿分離機構１００Ｃは、例えば第２の実施形態の原稿分離機構１００Ｂと同じく、図４（ａ）～（ｃ）に示すように分離ローラ１０２と分離片１０４と第１付勢部１０６と第１押圧板１０８と第２押圧板１１２と第１ガイド部１１６と第２ガイド部１１８と規制部１２０とを有する。原稿分離機構１００Ｃは、さらに、二個の第２付勢部１１０Ａ，１１０Ｂを有する。なお、原稿分離機構１００Ｃが有する分離ローラ１０２と分離片１０４と第１付勢部１０６と第１押圧板１０８と第２押圧板１１２と第１ガイド部１１６と第２ガイド部１１８と規制部１２０とは、第１の実施形態および／または第２の実施形態の原稿分離機構１００Ａ，１００Ｂを例に説明したとおりである。したがって、これらに関する詳細な説明は省略する。 (Third embodiment)
The document separation mechanism 100C according to the third embodiment is similar to the document separation mechanism 100B according to the second embodiment, for example, as illustrated in FIGS. 4A to 4C, and includes a separation roller 102, a separation piece 104, and a first attachment. It has the urging portion 106, the first pressing plate 108, the second pressing plate 112, the first guide portion 116, the second guide portion 118, and the regulating portion 120. The document separation mechanism 100C further includes two second urging units 110A and 110B. The separation roller 102, the separation piece 104, the first urging unit 106, the first pressing plate 108, the second pressing plate 112, the first guide unit 116, the second guide unit 118, and the regulating unit 120 included in the document separation mechanism 100C. Is as described with reference to the document separation mechanisms 100A and 100B of the first embodiment and / or the second embodiment. Therefore, the detailed description regarding these is abbreviate | omitted.
　第１付勢部１０６と第２付勢部１１０Ａ，１１０Ｂとは、コイルばねによって形成されている。原稿分離機構１００Ｃでは、二個の第２付勢部１１０Ａ，１１０Ｂは、第１付勢部１０６による付勢方向に対して垂直な方向において、第１付勢部１０６の両側に設置されている。また、第１付勢部１０６と第２付勢部１１０Ａ，１１０Ｂとは、第１付勢部１０６による付勢方向に対して垂直な方向の直線上に並列して設置されている。原稿分離機構１００Ｃについても第１付勢部１０６と第２付勢部１１０Ａ，１１０Ｂとは、原稿分離機構１００Ａの第１付勢部１０６と第２付勢部１１０の場合と同じ関係を有する。すなわち、第２付勢部１１０Ａ，１１０Ｂのばね定数は、第１付勢部１０６のばね定数以上に設定されている。第１付勢部１０６および第２付勢部１１０Ａ，１１０Ｂのコイル内径とコイル外径とは、前述の条件を満足するように設定される。なお、第１付勢部１０６および第２付勢部１１０Ａ，１１０Ｂとのこのような関係は、第２付勢部１１０Ａ，１１０Ｂのそれぞれが前述の条件を満足するように設定される他、第２付勢部１１０Ａ，１１０Ｂ全体として前述の条件が満足されるようにしてもよい。この場合、並列して設置された第２付勢部１１０Ａ，１１０Ｂ全体のばね定数は、それぞれのばね定数の和となる。 The first urging portion 106 and the second urging portions 110A and 110B are formed by coil springs. In the document separation mechanism 100 </ b> C, the two second urging units 110 </ b> A and 110 </ b> B are installed on both sides of the first urging unit 106 in a direction perpendicular to the urging direction by the first urging unit 106. . In addition, the first urging unit 106 and the second urging units 110A and 110B are installed in parallel on a straight line in a direction perpendicular to the urging direction by the first urging unit 106. Regarding the document separating mechanism 100C, the first urging unit 106 and the second urging units 110A and 110B have the same relationship as the first urging unit 106 and the second urging unit 110 of the document separating mechanism 100A. That is, the spring constants of the second urging units 110A and 110B are set to be equal to or greater than the spring constant of the first urging unit 106. The coil inner diameter and coil outer diameter of the first urging portion 106 and the second urging portions 110A and 110B are set so as to satisfy the above-described conditions. Note that such a relationship between the first urging unit 106 and the second urging units 110A and 110B is set so that each of the second urging units 110A and 110B satisfies the above-described conditions. The above-described conditions may be satisfied for the two urging units 110A and 110B as a whole. In this case, the spring constants of the entire second urging portions 110A and 110B installed in parallel are the sum of the respective spring constants.
　例えば、第１の実施形態の場合と同様に、原稿３００Ａと複数枚の原稿３００Ｂとが一度に、分離ローラ１０２と分離片１０４との間に進入した場合、分離片１０４が、付勢方向と反対方向に押される。分離片１０４が付勢方向と反対方向に押されると、第１押圧板１０８が第１ガイド部１１６の内周面Ｍに沿って後退し、第１付勢部１０６がそれに対応して圧縮される。第１付勢部１０６の圧縮量が隙間ｔとなり、通常位置から隙間ｔだけ後退すると、第１押圧板１０８と第２押圧板１１２とが接する。具体的に、第１押圧板１０８と第２押圧板１１２とが面接触する。その後、分離片１０４が基準位置を越えて、さらに後退すると、第２押圧板１１２が第２ガイド部１１８の内周面Ｎに沿って後退する。そして、第２付勢部１１０Ａ，１１０Ｂも第１押圧板１０８により圧縮されることになる。第１押圧板１０８により圧縮されることで、第２付勢部１１０Ａ，１１０Ｂによる付勢力が発生する。したがって、分離片１０４は、基準位置を越えて、さらに後退すると、第１付勢部１０６と第２付勢部１１０Ａ，１１０Ｂとによって分離ローラ１０２の外周面側に付勢される。 For example, as in the case of the first embodiment, when the document 300A and the plurality of documents 300B enter between the separation roller 102 and the separation piece 104 at a time, the separation piece 104 is set in the urging direction. Pushed in the opposite direction. When the separation piece 104 is pushed in the direction opposite to the urging direction, the first pressing plate 108 moves backward along the inner peripheral surface M of the first guide portion 116, and the first urging portion 106 is compressed correspondingly. The When the amount of compression of the first urging portion 106 becomes the gap t and retreats by the gap t from the normal position, the first pressing plate 108 and the second pressing plate 112 come into contact with each other. Specifically, the first pressing plate 108 and the second pressing plate 112 are in surface contact. Thereafter, when the separation piece 104 further moves back beyond the reference position, the second pressing plate 112 moves back along the inner peripheral surface N of the second guide portion 118. The second urging portions 110A and 110B are also compressed by the first pressing plate 108. By being compressed by the first pressing plate 108, an urging force is generated by the second urging units 110A and 110B. Accordingly, when the separation piece 104 further moves backward beyond the reference position, the separation piece 104 is urged toward the outer peripheral surface side of the separation roller 102 by the first urging portion 106 and the second urging portions 110A and 110B.
　これに対し、給紙トレイ１３０にセットされた原稿３００の枚数が減少すると、第１付勢部１０６と第２付勢部１１０Ａ，１１０Ｂとの圧縮量が小さくなり、分離片１０４が前進する。分離片１０４が前進し基準位置に到達すると、第２押圧板１１２の外周部分が規制部１２０に接する。規制部１２０に接した第２押圧板１１２は、第２付勢部１１０Ａ，１１０Ｂから付勢されたとしても、これ以上、分離ローラ１０２の外周面側に前進しない。これによって、第２付勢部１１０Ａ，１１０Ｂによる分離片１０４の付勢は解除される。 On the other hand, when the number of documents 300 set on the paper feed tray 130 decreases, the compression amount of the first urging unit 106 and the second urging unit 110A, 110B decreases, and the separation piece 104 advances. When the separation piece 104 moves forward and reaches the reference position, the outer peripheral portion of the second pressing plate 112 comes into contact with the restricting portion 120. Even if the second pressing plate 112 in contact with the restricting portion 120 is urged by the second urging portions 110 </ b> A and 110 </ b> B, it does not advance further to the outer peripheral surface side of the separation roller 102. Thereby, the urging | biasing of the separation piece 104 by 2nd urging | biasing part 110A, 110B is cancelled | released.
　原稿分離機構１００Ｃにおいて実現される動作などは、第１の実施形態および第２の実施形態の原稿分離機構１００Ａ，１００Ｂと同様である。原稿分離機構１００Ｃによっても、原稿分離機構１００Ａ，１００Ｂと同様の機能が実現される。 The operation realized in the document separation mechanism 100C is the same as that of the document separation mechanisms 100A and 100B of the first and second embodiments. The document separation mechanism 100C also realizes the same function as the document separation mechanisms 100A and 100B.
　（第４の実施形態）
　第４の実施形態の原稿分離機構１００Ｄは、図５（ａ）～（ｃ）に示すように分離ローラ１０２と分離片１０４と第１付勢部１０６と第１押圧板１０８とを有する。原稿分離機構１００Ｄは、コイルばねではなく、ゴムなどの弾性部材によって形成された第２付勢部２１０Ａ，２１０Ｂを有する。なお、原稿分離機構１００Ｄが有する分離ローラ１０２と分離片１０４と第１付勢部１０６と第１押圧板１０８とは、例えば第１の実施形態の原稿分離機構１００Ａを例に説明したとおりである。したがって、これらに関する詳細な説明は省略する。 (Fourth embodiment)
The document separation mechanism 100D of the fourth embodiment includes a separation roller 102, a separation piece 104, a first urging portion 106, and a first pressing plate 108, as shown in FIGS. The document separation mechanism 100D has second urging portions 210A and 210B formed by an elastic member such as rubber instead of a coil spring. The separation roller 102, the separation piece 104, the first urging unit 106, and the first pressing plate 108 included in the document separation mechanism 100D are as described in the document separation mechanism 100A of the first embodiment as an example. . Therefore, the detailed description regarding these is abbreviate | omitted.
　原稿分離機構１００Ｄについても第１付勢部１０６と第２付勢部２１０Ａ，２１０Ｂとは、第２付勢部２１０Ａ，２１０Ｂを一定量、即ち単位量圧縮させるための力が第１付勢部１０６を一定量、即ち単位量圧縮させるための力以上となる関係を有する。なお、第１付勢部１０６および第２付勢部２１０Ａ，２１０Ｂとのこのような関係は、第２付勢部２１０Ａ，２１０Ｂのそれぞれが前述の条件を満足するように設定される他、第２付勢部２１０Ａ，２１０Ｂ全体として前述の条件が満足されるようにしてもよい。原稿分離機構１００Ｄでは、二個の第２付勢部２１０Ａ，２１０Ｂは、第１付勢部１０６による付勢方向に対して垂直な方向において、第１付勢部１０６の両側に設置されている。また、第１付勢部１０６と第２付勢部２１０Ａ，２１０Ｂとは、第１付勢部１０６による付勢方向に対して垂直な方向の直線上に並列して設置されている。 Also for the document separating mechanism 100D, the first urging unit 106 and the second urging units 210A and 210B have a force for compressing the second urging units 210A and 210B by a certain amount, that is, a unit amount. There is a relationship that is equal to or greater than a force for compressing 106 by a certain amount, that is, a unit amount. The relationship between the first urging unit 106 and the second urging units 210A and 210B is set so that each of the second urging units 210A and 210B satisfies the above-described conditions. The above-described conditions may be satisfied as a whole of the two urging units 210A and 210B. In the document separation mechanism 100D, the two second urging units 210A and 210B are installed on both sides of the first urging unit 106 in a direction perpendicular to the urging direction by the first urging unit 106. . In addition, the first urging unit 106 and the second urging units 210A and 210B are installed in parallel on a straight line in a direction perpendicular to the urging direction by the first urging unit 106.
　原稿分離機構１００Ｄは、第１の実施形態～第３の実施形態の原稿分離機構１００Ａ，１００Ｂ，１００Ｃが有していた第２押圧板１１２を有していない。第２付勢部２１０Ａ，２１０Ｂは、分離片１０４が、原稿３００Ａなどによって押されていない状態において、第１押圧板１０８と隙間ｔだけ離れた状態で対向するように設置されている。隙間ｔは、第１付勢部１０６の通常位置における付勢方向の長さＬ１と第２付勢部２１０Ａ，２１０Ｂとの付勢方向の長さ、即ち全長Ｌ２の差ｓに一致する。 The document separation mechanism 100D does not have the second pressing plate 112 that the document separation mechanisms 100A, 100B, 100C of the first to third embodiments have. The second urging portions 210A and 210B are disposed so as to face the first pressing plate 108 in a state where the separation piece 104 is not pressed by the original 300A or the like and separated from the first pressing plate 108 by a gap t. The gap t coincides with the difference s between the length L1 in the biasing direction at the normal position of the first biasing portion 106 and the length in the biasing direction between the second biasing portions 210A and 210B, that is, the total length L2.
　例えば、第１の実施形態の場合と同様に、原稿３００Ａと複数枚の原稿３００Ｂとが一度に、分離ローラ１０２と分離片１０４との間に進入した場合、分離片１０４が、付勢方向と反対方向に押される。分離片１０４が付勢方向と反対方向に押されると、第１押圧板１０８が後退し、第１付勢部１０６がそれに対応して圧縮される。第１付勢部１０６の圧縮量が隙間ｔとなり、通常位置から隙間ｔだけ後退すると、第１押圧板１０８と第２付勢部２１０Ａ，２１０Ｂとが接する。第２付勢部２１０Ａ，２１０Ｂは、第１押圧板１０８に対向する部分が、所定の面積を有する面によって形成されている。したがって、第１押圧板１０８と第２付勢部２１０Ａ，２１０Ｂとは面接触する。なお、第１押圧板１０８と第２付勢部２１０Ａ，２１０Ｂとが面接触することとなる分離片１０４の位置は、上記における基準位置に対応する。以下、この位置についても、基準位置という。その後、分離片１０４が基準位置を越えて、さらに後退すると、第２付勢部２１０Ａ，２１０Ｂも第１押圧板１０８により圧縮されることになる。第１押圧板１０８により圧縮されることで、第２付勢部２１０Ａ，２１０Ｂによる付勢力が発生する。したがって、分離片１０４は、基準位置を越えて、さらに後退すると、第１付勢部１０６と第２付勢部２１０Ａ，２１０Ｂとによって分離ローラ１０２の外周面側に付勢される。 For example, as in the case of the first embodiment, when the document 300A and the plurality of documents 300B enter between the separation roller 102 and the separation piece 104 at a time, the separation piece 104 is set in the urging direction. Pushed in the opposite direction. When the separation piece 104 is pushed in the direction opposite to the urging direction, the first pressing plate 108 moves backward, and the first urging portion 106 is compressed correspondingly. When the compression amount of the first urging portion 106 becomes the gap t and moves backward by the gap t from the normal position, the first pressing plate 108 and the second urging portions 210A and 210B come into contact with each other. As for 2nd urging | biasing part 210A, 210B, the part which opposes the 1st press board 108 is formed by the surface which has a predetermined area. Accordingly, the first pressing plate 108 and the second urging portions 210A and 210B are in surface contact. Note that the position of the separation piece 104 where the first pressing plate 108 and the second urging portions 210A and 210B come into surface contact corresponds to the reference position described above. Hereinafter, this position is also referred to as a reference position. Thereafter, when the separating piece 104 further moves back beyond the reference position, the second urging portions 210A and 210B are also compressed by the first pressing plate 108. By being compressed by the first pressing plate 108, an urging force is generated by the second urging portions 210A and 210B. Accordingly, when the separation piece 104 further moves backward beyond the reference position, the separation piece 104 is urged toward the outer peripheral surface side of the separation roller 102 by the first urging portion 106 and the second urging portions 210A and 210B.
　これに対し、給紙トレイ１３０にセットされた原稿３００の枚数が減少すると、第１付勢部１０６と第２付勢部２１０Ａ，２１０Ｂとの圧縮量が小さくなり、分離片１０４が前進する。分離片１０４が前進し基準位置に到達すると、第２付勢部２１０Ａ，２１０Ｂの変形量は０となる。これによって、第２付勢部２１０Ａ，２１０Ｂによる分離片１０４の付勢は解除される。 On the other hand, when the number of documents 300 set on the paper feed tray 130 decreases, the compression amount of the first urging unit 106 and the second urging unit 210A, 210B decreases, and the separation piece 104 advances. When the separation piece 104 moves forward and reaches the reference position, the deformation amount of the second urging portions 210A and 210B becomes zero. Thereby, the urging | biasing of the separation piece 104 by 2nd urging | biasing part 210A, 210B is cancelled | released.
　原稿分離機構１００Ｄにおいて実現される動作などは、第１の実施形態～第３の実施形態の原稿分離機構１００Ａ，１００Ｂ，１００Ｃなどと同様である。原稿分離機構１００Ｄによっても、原稿分離機構１００Ａ，１００Ｂ，１００Ｃなどと同様の機能が実現される。第１付勢部１０６を、第２付勢部２１０Ａ，２１０Ｂのようにゴムなどの弾性部材としてもよい。 The operations realized in the document separation mechanism 100D are the same as those of the document separation mechanisms 100A, 100B, 100C of the first to third embodiments. The document separation mechanism 100D also realizes the same function as the document separation mechanisms 100A, 100B, 100C, and the like. The first urging portion 106 may be an elastic member such as rubber like the second urging portions 210A and 210B.
　以上説明した本実施形態の原稿分離機構１００によれば、次のような効果を得ることができる。例えば、上記した特許文献１に記載の摩擦分離パッドでの分離給紙方式では、複数の原稿が弾性力により摩擦分離パッドを介してフィードローラに圧接されている。いまフィードローラが回転すると、フィードローラに接した１枚目の原稿は摩擦分離パッドからの抵抗に打ち勝ち搬送されるが、フィードローラに接していない２枚目以降の原稿は摩擦分離パッドからの抵抗の方が大きく搬送されない。この結果、複数枚の原稿の分離が可能になる。摩擦分離パッドでの分離給紙方式では、一定枚数以上の原稿を分離する場合の対応として、摩擦分離パッドのフィードローラへの押圧力を大きく設定することが考えられる。しかし、大きな押圧力で摩擦分離パッドをフィードローラへ圧接すると、摩擦分離パッドおよびフィードローラの摩耗が増大し、部品寿命が短くなってしまうという問題があった。 According to the document separation mechanism 100 of the present embodiment described above, the following effects can be obtained. For example, in the separation and feeding method using the friction separation pad described in Patent Document 1 described above, a plurality of documents are pressed against the feed roller via the friction separation pad by elastic force. If the feed roller rotates now, the first document in contact with the feed roller overcomes the resistance from the friction separation pad, but the second and subsequent documents not in contact with the feed roller are resisted from the friction separation pad. Is not transported larger. As a result, a plurality of documents can be separated. In the separation feeding method using the friction separation pad, it is conceivable to set a large pressing force to the feed roller of the friction separation pad as a countermeasure when separating a predetermined number of documents or more. However, when the frictional separation pad is brought into pressure contact with the feed roller with a large pressing force, there is a problem that wear of the frictional separation pad and the feed roller is increased and the life of the parts is shortened.
　これに対して、本実施形態の原稿分離機構１００によれば、分離片１０４と分離ローラ１０２との間に存在する原稿３００Ｂの枚数に応じて、分離片１０４により付勢される力を変更することができる。そのため、分離ローラ１０２および分離片１０４の過剰な摩耗を低減させることができる。 On the other hand, according to the document separation mechanism 100 of the present embodiment, the force urged by the separation piece 104 is changed according to the number of documents 300B existing between the separation piece 104 and the separation roller 102. be able to. Therefore, excessive wear of the separation roller 102 and the separation piece 104 can be reduced.
　（変形例）
　本実施形態の原稿分離機構１００は、次のようにすることもできる。 (Modification)
The document separation mechanism 100 of the present embodiment can also be configured as follows.
　（１）第１の実施形態～第４の実施形態では、第１押圧板１０８を有する原稿分離機構１００Ａ，１００Ｂ，１００Ｃ，１００Ｄを例に説明した。また、第１の実施形態～第３の実施形態では、第１押圧板１０８と第２押圧板１１２とを有する原稿分離機構１００Ａ，１００Ｂ，１００Ｃを例に説明した。 (1) In the first to fourth embodiments, the document separation mechanisms 100A, 100B, 100C, and 100D having the first pressing plate 108 have been described as examples. In the first to third embodiments, the document separation mechanisms 100A, 100B, and 100C having the first pressing plate 108 and the second pressing plate 112 have been described as examples.
　原稿分離機構１００では、第１押圧板１０８、及び第２押圧板１１２のいずれか一方を省略し、第１付勢部１０６と第２付勢部１１０，１１０Ａ，１１０Ｂ，２１０Ａ，２１０Ｂとが、直接分離片１０４を付勢する構成としてもよい。この場合、第２の実施形態の原稿分離機構１００Ｂなどが有する第１ガイド部１１６と第２ガイド部１１８とについても省略してよい。また、第１付勢部１０６の全長Ｌ１と第２付勢部１１０，１１０Ａ，１１０Ｂ，２１０Ａ，２１０Ｂの全長Ｌ２との差ｓが隙間ｔとなる。 In the document separation mechanism 100, either the first pressing plate 108 or the second pressing plate 112 is omitted, and the first urging unit 106 and the second urging units 110, 110A, 110B, 210A, and 210B are provided. The separation piece 104 may be directly biased. In this case, the first guide unit 116 and the second guide unit 118 included in the document separation mechanism 100B according to the second embodiment may be omitted. Further, the difference s between the total length L1 of the first biasing portion 106 and the total length L2 of the second biasing portions 110, 110A, 110B, 210A, and 210B is a gap t.
　（２）本実施形態の原稿分離機構１００は、図６に示すような原稿分離機構１００Ｅとしてもよく、このような原稿分離機構１００Ｅをも含む。原稿分離機構１００Ｅは、分離ローラ１０２と分離片１０４と第１付勢部４０６と第２付勢部４１０とを有する。原稿分離機構１００Ｅでは第１付勢部４０６と第２付勢部４１０は、板ばねによって形成されている。第１付勢部４０６と第２付勢部４１０は、分離片１０４に沿って蓋２４の所定の位置に取り付けられている。分離片１０４と第１付勢部４０６と第２付勢部４１０とは、蓋２４側から第２付勢部４１０、第１付勢部４０６、分離片１０４の順で取り付けられている。 (2) The document separation mechanism 100 of the present embodiment may be a document separation mechanism 100E as shown in FIG. 6, and also includes such a document separation mechanism 100E. The document separation mechanism 100E includes a separation roller 102, a separation piece 104, a first urging unit 406, and a second urging unit 410. In the document separation mechanism 100E, the first urging portion 406 and the second urging portion 410 are formed by leaf springs. The first urging unit 406 and the second urging unit 410 are attached to a predetermined position of the lid 24 along the separation piece 104. The separation piece 104, the first urging portion 406, and the second urging portion 410 are attached in the order of the second urging portion 410, the first urging portion 406, and the separation piece 104 from the lid 24 side.
　第１付勢部４０６は、平板状の形状を有している。第１付勢部４０６の一方側の面は、分離片１０４に接するように設置されている。第２付勢部４１０は、第２付勢取付部４１０Ａと第２付勢本体部４１０Ｂとが一体で形成された段付き板状の形状を有する。第２付勢部４１０は、第２付勢取付部４１０Ａで、蓋２４側に取り付けられ、第２付勢本体部４１０Ｂで分離片１０４を付勢する。第２付勢部４１０に形成された段部の高さは、上述の隙間ｔに相当する寸法に設定されている。すなわち、原稿分離機構１００Ｅでは、第１付勢部４０６の他方側の面と、この面に対向する第２付勢本体部４１０Ｂの面とが、隙間ｔだけ離れた状態で設置されている。 The first urging portion 406 has a flat plate shape. One surface of the first urging portion 406 is installed in contact with the separation piece 104. The second urging portion 410 has a stepped plate shape in which the second urging attachment portion 410A and the second urging main body portion 410B are integrally formed. The second urging portion 410 is attached to the lid 24 side by the second urging attachment portion 410A, and urges the separation piece 104 by the second urging main body portion 410B. The height of the step formed in the second urging portion 410 is set to a dimension corresponding to the gap t described above. That is, in the document separation mechanism 100E, the other surface of the first urging portion 406 and the surface of the second urging main body portion 410B facing this surface are installed in a state where they are separated by a gap t.
　原稿分離機構１００Ｅについても第１付勢部４０６と第２付勢部４１０とは、原稿分離機構１００Ａの第１付勢部１０６と第２付勢部１１０の場合と同じ関係を有する。第２付勢部４１０のばね定数は、第１付勢部４０６のばね定数以上に設定されている。 Regarding the document separating mechanism 100E, the first urging unit 406 and the second urging unit 410 have the same relationship as the first urging unit 106 and the second urging unit 110 of the document separating mechanism 100A. The spring constant of the second urging unit 410 is set to be greater than or equal to the spring constant of the first urging unit 406.
　例えば、第１の実施形態の場合と同様に、原稿３００Ａと複数枚の原稿３００Ｂとが一度に、分離ローラ１０２と分離片１０４との間に進入した場合、分離片１０４が、付勢方向と反対方向に押される。分離片１０４が付勢方向と反対方向に押されると、第１付勢部４０６がそれに対応して変形する。第１付勢部４０６が隙間ｔだけ変形すると、第１付勢部４０６と第２付勢本体部４１０Ｂとが接する。なお、第１付勢部４０６と第２付勢本体部４１０Ｂとが接することとなる分離片１０４の位置は、上記における基準位置に対応する。以下、この位置についても、基準位置という。その後、分離片１０４が基準位置を越えて、さらに後退すると、第２付勢部４１０も変形することになる。第２付勢部４１０が変形することで、第２付勢部４１０による付勢力が発生する。したがって、分離片１０４は、基準位置を越えて、さらに後退すると、第１付勢部４０６と第２付勢部４１０とによって分離ローラ１０２の外周面側に付勢される。 For example, as in the case of the first embodiment, when the document 300A and the plurality of documents 300B enter between the separation roller 102 and the separation piece 104 at a time, the separation piece 104 is set in the urging direction. Pushed in the opposite direction. When the separation piece 104 is pushed in the direction opposite to the urging direction, the first urging portion 406 is deformed correspondingly. When the first urging portion 406 is deformed by the gap t, the first urging portion 406 and the second urging main body portion 410B come into contact with each other. The position of the separation piece 104 where the first urging portion 406 and the second urging main body portion 410B are in contact corresponds to the reference position described above. Hereinafter, this position is also referred to as a reference position. Thereafter, when the separating piece 104 further moves backward beyond the reference position, the second urging portion 410 is also deformed. As the second urging unit 410 is deformed, the urging force of the second urging unit 410 is generated. Therefore, when the separation piece 104 further moves backward beyond the reference position, the separation piece 104 is urged toward the outer peripheral surface side of the separation roller 102 by the first urging portion 406 and the second urging portion 410.
　これに対し、給紙トレイ１３０にセットされた原稿３００の枚数が減少すると、第１付勢部４０６と第２付勢部４１０との変形量が小さくなり、分離片１０４は前進する。分離片１０４が前進し基準位置に到達すると、第２付勢部４１０の変形量が０となる。これによって、第２付勢部４１０による分離片１０４の付勢は解除される。 On the other hand, when the number of documents 300 set on the paper feed tray 130 decreases, the deformation amount of the first urging unit 406 and the second urging unit 410 decreases, and the separation piece 104 moves forward. When the separation piece 104 moves forward and reaches the reference position, the deformation amount of the second urging portion 410 becomes zero. Thereby, the urging | biasing of the separation piece 104 by the 2nd urging | biasing part 410 is cancelled | released.
　原稿分離機構１００Ｅにおいて実現される動作などは、本実施形態の原稿分離機構１００と同様である。原稿分離機構１００Ｅによっても、原稿分離機構１００と同様の機能が実現される。 The operation realized in the document separation mechanism 100E is the same as that of the document separation mechanism 100 of the present embodiment. The document separation mechanism 100E also achieves the same function as the document separation mechanism 100.
　１００，１００Ａ，１００Ｂ，１００Ｃ，１００Ｄ，１００Ｅ　原稿分離機構
　１０２　分離ローラ
　１０４　分離片
　１０６，４０６　第１付勢部
　１１０，１１０Ａ，１１０Ｂ，２１０Ａ，２１０Ｂ，４１０　第２付勢部
　３００，３００Ａ，３００Ｂ　原稿 100, 100A, 100B, 100C, 100D, 100E Document separating mechanism 102 Separating roller 104 Separating piece 106,406 First biasing section 110, 110A, 110B, 210A, 210B, 410 Second biasing section 300, 300A, 300B Document

Claims (10)

  1. 　複数枚重なり合った原稿から一枚の原稿を分離し、搬送する原稿分離機構であって、
    　複数枚重なり合った原稿から第１原稿を分離し、分離された前記第１原稿を回転しながら搬送する分離ローラと、
    　前記分離ローラの外周面に近接して配置され、前記分離ローラによって搬送される前記第１原稿に付着した第２原稿を、前記第１原稿から分離する分離片と、
    　前記分離片を前記分離ローラの外周面側に付勢する第１付勢部と、
    　前記分離片が前記第１付勢部による付勢に抗して前記第１付勢部による付勢方向と反対側に所定の位置を越えて後退した場合、前記第１付勢部で付勢されている前記分離片をさらに前記分離ローラの外周面側に付勢し、前記分離片が前記所定の位置より前記分離ローラの外周面側に前進した場合、前記分離片を付勢しない第２付勢部とを有することを特徴とする原稿分離機構。     A document separation mechanism that separates and transports one document from a plurality of documents that overlap each other,
    A separation roller that separates a first document from a plurality of stacked documents and conveys the separated first document while rotating;
    A separation piece that is arranged in the vicinity of the outer peripheral surface of the separation roller and separates the second document attached to the first document conveyed by the separation roller from the first document;
    A first urging portion that urges the separation piece toward the outer peripheral surface of the separation roller;
    When the separation piece moves backward beyond a predetermined position in a direction opposite to the urging direction by the first urging unit against the urging by the first urging unit, the urging is performed by the first urging unit. The separation piece is further urged toward the outer peripheral surface side of the separation roller, and when the separation piece advances from the predetermined position toward the outer peripheral surface side of the separation roller, the second separation piece is not urged. An original separating mechanism having an urging unit.
  2. 　前記第１付勢部と前記第２付勢部とは、前記付勢方向に弾性変形する弾性部材であって、
    　前記第２付勢部は、前記付勢方向の長さが前記第１付勢部の前記付勢方向の長さより短く、
    　前記第２付勢部は、前記第１付勢部の前記付勢方向と反対側への弾性変形量が、前記第１付勢部と前記第２付勢部との前記付勢方向の長さの差に基づいた量より大きくなり、前記分離片が前記所定の位置を越えて後退した場合、前記第１付勢部で付勢されている前記分離片をさらに前記分離ローラの外周面側に付勢し、前記第１付勢部の前記付勢方向と反対側への弾性変形量が、前記第１付勢部と前記第２付勢部との前記付勢方向の長さの差に基づいた量より小さくなり、前記分離片が前記所定の位置より前記分離ローラの外周面側に前進した場合、前記分離片を付勢しないことを特徴とする請求項１に記載の原稿分離機構。     The first urging portion and the second urging portion are elastic members that elastically deform in the urging direction,
    The second urging portion has a length in the urging direction shorter than a length in the urging direction of the first urging portion,
    In the second urging portion, the amount of elastic deformation of the first urging portion in the direction opposite to the urging direction is the length of the urging direction between the first urging portion and the second urging portion. And when the separation piece is retracted beyond the predetermined position, the separation piece urged by the first urging portion is further moved to the outer peripheral surface side of the separation roller. The amount of elastic deformation of the first urging portion in the direction opposite to the urging direction is a difference in length between the first urging portion and the second urging portion in the urging direction. 2. The document separation mechanism according to claim 1, wherein the separation piece is not biased when the separation piece moves forward from the predetermined position toward the outer peripheral surface side of the separation roller. .
  3. 　前記第１付勢部と前記第２付勢部とは、前記第２付勢部を一定量圧縮させるための力が前記第１付勢部を前記一定量圧縮させるための力以上となる関係を有することを特徴とする請求項２に記載の原稿分離機構。 The first urging unit and the second urging unit have a relationship in which a force for compressing the second urging unit by a certain amount is equal to or greater than a force for compressing the first urging unit by the certain amount. The document separation mechanism according to claim 2, further comprising:
  4. 　前記分離片と前記第１付勢部との間に設けられた第１押圧板を有し、
    　前記第１付勢部は、前記第１押圧板を介して前記分離片を付勢することを特徴とする請求項１に記載の原稿分離機構。     A first pressing plate provided between the separation piece and the first urging portion;
    The document separation mechanism according to claim 1, wherein the first urging unit urges the separation piece via the first pressing plate.
  5. 　前記分離片の後退と前進とに対応した前記第１押圧板の移動をガイドする第１ガイド部を有することを特徴とする請求項４に記載の原稿分離機構。 5. The document separating mechanism according to claim 4, further comprising a first guide portion for guiding the movement of the first pressing plate corresponding to the backward and forward movement of the separation piece.
  6. 　前記分離片と前記第２付勢部との間に設けられた第２押圧板を有し、
    　前記第２付勢部は、前記第２押圧板を介して前記分離片を付勢することを特徴とする請求項１に記載の原稿分離機構。     A second pressing plate provided between the separation piece and the second urging portion;
    The document separation mechanism according to claim 1, wherein the second urging unit urges the separation piece through the second pressing plate.
  7. 　前記分離片の後退と前進とに対応した前記第２押圧板の移動をガイドする第２ガイド部を有することを特徴とする請求項６に記載の原稿分離機構。 The document separating mechanism according to claim 6, further comprising a second guide portion for guiding the movement of the second pressing plate corresponding to the backward and forward movement of the separation piece.
  8. 　前記第２ガイド部には、前記所定の位置に、前記第２押圧板が前記分離ローラの外周面側に前進することを規制する規制部が形成されていることを特徴とする請求項７に記載の原稿分離機構。 The said 2nd guide part is formed with the control part which controls that the said 2nd press plate advances to the outer peripheral surface side of the said separation roller in the said predetermined position. Document separation mechanism as described.
  9. 　前記原稿分離機構は、前記分離片と前記第１付勢部との間に設けられた第１押圧板を有し、
    　前記第１付勢部は、前記第１押圧板を介して前記分離片を付勢し、
    　前記原稿分離機構は、前記分離片と前記第２付勢部との間に設けられた第２押圧板を有し、
    　前記第２付勢部は、前記第２押圧板を介して前記分離片を付勢し、
    　前記所定の位置は、前記分離片が前記第１付勢部による付勢に抗して前記第１付勢部による付勢方向と反対側に後退したことにより前記第１押圧板と前記第２押圧板とが接することとなった前記分離片の前記付勢方向における位置であることを特徴とする請求項１に記載の原稿分離機構。     The document separation mechanism has a first pressing plate provided between the separation piece and the first urging portion,
    The first biasing portion biases the separation piece via the first pressing plate,
    The document separation mechanism has a second pressing plate provided between the separation piece and the second urging portion,
    The second urging portion urges the separation piece via the second pressing plate,
    The predetermined position is determined by the first pressing plate and the second pressing plate when the separating piece is moved backward in the direction opposite to the urging direction by the first urging portion against the urging by the first urging portion. 2. The document separation mechanism according to claim 1, wherein the separation piece is a position in the urging direction of the separation piece that comes into contact with the pressing plate.
  10. 　前記第２付勢部のばね定数は、前記第１付勢部のばね定数以上であることを特徴とする請求項２に記載の原稿分離機構。 3. The document separation mechanism according to claim 2, wherein a spring constant of the second urging portion is equal to or greater than a spring constant of the first urging portion.
PCT/JP2010/073313 2010-02-25 2010-12-24 Sheet separating mechanism WO2011104989A1 (en)

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JP6188467B2 (en) * 2013-07-18 2017-08-30 ローランドディー．ジー．株式会社 Tension fluctuation mitigation device in fabric printing device
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Citations (3)

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Publication number Priority date Publication date Assignee Title
JPS6134547U (en) * 1984-08-03 1986-03-03 富士通機電株式会社 Media separation mechanism
JPH0618345U (en) * 1992-08-17 1994-03-08 コニカ株式会社 Automatic paper feeder
JPH08310680A (en) * 1995-05-10 1996-11-26 Canon Inc Sheet separating and automatically feeding device and image forming device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6134547U (en) * 1984-08-03 1986-03-03 富士通機電株式会社 Media separation mechanism
JPH0618345U (en) * 1992-08-17 1994-03-08 コニカ株式会社 Automatic paper feeder
JPH08310680A (en) * 1995-05-10 1996-11-26 Canon Inc Sheet separating and automatically feeding device and image forming device

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