US20080061494A1 - Media-feed assemblies - Google Patents

Media-feed assemblies Download PDF

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Publication number
US20080061494A1
US20080061494A1 US11/850,870 US85087007A US2008061494A1 US 20080061494 A1 US20080061494 A1 US 20080061494A1 US 85087007 A US85087007 A US 85087007A US 2008061494 A1 US2008061494 A1 US 2008061494A1
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United States
Prior art keywords
gear
media
angle
stopper
feed assembly
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US11/850,870
Inventor
Chien Chih Chen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qisda Corp
Original Assignee
Qisda Corp
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
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Assigned to QISDA CORPORATION reassignment QISDA CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHEN, CHIEN-CHIH
Publication of US20080061494A1 publication Critical patent/US20080061494A1/en
Abandoned legal-status Critical Current

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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
    • B65H3/0661—Rollers or like rotary separators for separating inclined-stacked articles with separator rollers above the stack
    • 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
    • B65H3/0684—Rollers or like rotary separators on moving support, e.g. pivoting, for bringing the roller or like rotary separator into contact with the 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
    • B65H3/56—Elements, e.g. scrapers, fingers, needles, brushes, acting on separated article or on edge of the 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
    • B65H3/56—Elements, e.g. scrapers, fingers, needles, brushes, acting on separated article or on edge of the pile
    • B65H3/565—Elements, e.g. scrapers, fingers, needles, brushes, acting on separated article or on edge of the pile for reintroducing partially separated articles in the stack
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2403/00—Power transmission; Driving means
    • B65H2403/40—Toothed gearings
    • B65H2403/42—Spur gearing
    • B65H2403/422—Spur gearing involving at least a swing gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/10—Cassettes, holders, bins, decks, trays, supports or magazines for sheets stacked substantially horizontally
    • B65H2405/11—Parts and details thereof
    • B65H2405/113—Front, i.e. portion adjacent to the feeding / delivering side

Definitions

  • the invention relates in general to media-feed assemblies and in particular to media-feed assemblies preventing accidental feeding of multiple sheets.
  • a conventional media-feed assembly of a business machine primarily comprises a tray 12 with a sheet stack (not shown) disposed therein, a separator 14 on the bottom of the tray 12 , a shaft 16 , a feed arm 18 , and a feed roller 19 at an end of the feed arm 18 .
  • the feed arm 18 is pivotally connected to the shaft 16
  • the shaft 16 is mounted to the side walls of the tray 12 .
  • the sheet stack is pressed and fed by the feed roller 19 , wherein the feed arm 18 is rotatable around the shaft 16 to adjust the angle thereof for feeding sheets of various thicknesses.
  • the lower sheets of the sheet stack are buckled by the separator 14 , and only the top sheet is fed.
  • accidental feeding of multiple sheets may occur.
  • a media-feed mechanism comprises a frame, a stopper, a rotary member, and a swing gear mechanism.
  • the rotary member comprises a cam contacting the stopper and a driven gear fixed to the cam.
  • a first gear thereof engages the driven gear and drives the cam rotating in a first direction, to impel the stopper from a first angle to a second angle.
  • a second gear thereof engages the driven gear and drives the cam rotating in the first direction, such that the stopper rotates from the second angle to the first angle.
  • FIG. 1 is a perspective diagram of a conventional media-feed assembly
  • FIG. 2 is a perspective diagram of an embodiment of a media-feed assembly
  • FIG. 3 is a perspective diagram of an embodiment of a stopper
  • FIG. 4 is a perspective diagram of a first gear engaged with a driven gear
  • FIG. 5 is a perspective diagram of a first gear disengaged from a driven gear when meeting a toothless potion thereof;
  • FIG. 6 is a perspective diagram of a second gear engaged with a driven gear
  • FIG. 7 is a perspective diagram of a second gear disengaged from a driven gear when meeting a toothless potion thereof.
  • a media-feed assembly of a business machine primarily comprises a frame H, a stopper 51 , a rotary member 61 , and a swing gear mechanism 71 .
  • the stopper 51 , the rotary member 61 , and the swing gear mechanism 71 are pivotally connected to the frame H.
  • the frame H comprises a tray 41 with a sheet stack S disposed therein.
  • the top sheet S 1 of the sheet stack S is fed by a roller connected to the frame H, such as the feed roller 19 shown in FIG. 1 , along a feeding direction A.
  • the stopper 51 is rotatable with respect to the frame H to selectively guide or block the sheets, preventing feeding of multiple sheets.
  • the stopper 51 comprises a shaft 51 a pivotally connected to the frame H and a contact portion 51 b extending from the shaft 51 a , wherein the contact portion 51 b has a nub 51 c, such as an elastomer.
  • the rotary member 61 comprises a cam 61 a and a driven gear 61 b fixed to the cam 61 a.
  • the cam 61 a and the driven gear 61 b are monolithically formed in one piece, and the driven gear 61 b comprises an irregular toothless portion 61 b ′.
  • the driven gear 61 b and the cam 61 a are rotatable around a central axis C thereof, and the nub 51 c maintains contact with an outer surface of the cam 61 a.
  • the swing gear mechanism 71 comprises an arm 72 , a driving gear 73 , a first gear train 74 , and a second gear train 75 , wherein the driving gear 73 and first and second gear trains 74 and 75 are rotatably connected to the arm 72 .
  • the first and second gear trains 74 and 75 are engaged with the driving gear 73 from opposite sides thereof, wherein the first gear train 74 has a first gear 741 , and the second gear train 75 has two second gears 751 .
  • the first gear train 74 may have an odd number (such as three or five) of first gears 741
  • the second gear train 75 may have an even number (such as four or six) of second gears 751 .
  • the contact portion 51 b and the sheets S form an included angle ⁇ , and the sheets S are blocked by the contact portion 51 b from falling along direction A.
  • the swing gear mechanism 71 rotates to a first position as shown in FIG. 4 , such that the first gear 741 at the end of the first gear train 74 engages with the driven gear 61 b of the rotary member 61 .
  • the driven gear 61 b and the cam 61 a are rotated along a first direction A 1 (clockwise), such that the contact portion 51 b descends from the angle ⁇ to the angle ⁇ (shown in FIG. 5 ), wherein ⁇ > ⁇ .
  • the first gear 741 meets the toothless portion 61 b ′ and disengages from the driven gear 61 b , such that the contact portion 51 b is held in the angle ⁇ .
  • the top sheet S 1 of the sheet stack S can be fed by the feed roller.
  • the swing gear mechanism 71 is reversely rotated with the driving gear 73 (counterclockwise) from the first position to a second position, as shown in FIG. 6 , such that a second gear 751 at the end of the second gear train 75 is engaged with the driven gear 61 b.
  • the cam 61 of the rotary member 61 is driven to rotate along the first direction A 1 (clockwise) until the second gear 751 meets the toothless portion 61 b ′, as shown in FIG. 7 , such that the contact portion 51 b is lifted to the angle ⁇ .
  • the contact portion 51 b With rotation of the rotary member 61 along the first direction A 1 , the contact portion 51 b returns from the angle ⁇ shown in FIG. 6 to the angle ⁇ shown in FIG. 7 .
  • the swing gear mechanism 71 is disengaged from the driven gear 61 b when the second gear 751 meets the toothless portion 61 b ′, such that the contact portion 51 b can be held in angle ⁇ to block the sheets S from falling along the direction A.
  • the swing gear mechanism 71 is reversely rotated with the driving gear 73 (clockwise) and returned from the second position to the first position shown in FIG. 4 .
  • the cam 61 a is driven by the first gear 741 to rotate along a first direction A 1 (clockwise), such that the contact portion 51 b descends from the angle ⁇ to the angle ⁇ , as shown in FIG. 5 .
  • the driving gear 73 rotates the cam 61 a along the first direction A 1 , such that the contact portion 51 b of the stopper 51 descends from the angle ⁇ (shown in FIG. 4 ) to the angle ⁇ (shown in FIG. 5 ).
  • the driving gear 73 rotates the cam 61 a along the first direction A 1 , such that the contact portion 51 b of the stopper 51 is lifted from the angle ⁇ (shown in FIG. 6 ) to the angle ⁇ (shown in FIG. 7 ).
  • the swing gear mechanism 71 is disengaged from the driven gear 61 b, such that the contact portion 51 b can be selectively held in the angle ⁇ or the angle ⁇ , to prevent accidental feeding of multiple sheets.

Landscapes

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

Abstract

Media-feed mechanisms for business machines are provided. A media-feed mechanism comprises a frame, a stopper, a rotary member, and a swing gear mechanism. The rotary member comprises a cam contacting the stopper and a driven gear fixed to the cam. When the gear mechanism is in a first position, a first gear thereof engages the driven gear and rotates the cam in a first direction, to impel the stopper from a first angle to a second angle. When the swing gear mechanism is in a second position, a second gear thereof engages the driven gear and rotates the cam in the first direction, such that the stopper rotates from the second angle to the first angle.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The invention relates in general to media-feed assemblies and in particular to media-feed assemblies preventing accidental feeding of multiple sheets.
  • 2. Description of the Related Art
  • Referring to FIG. 1, a conventional media-feed assembly of a business machine primarily comprises a tray 12 with a sheet stack (not shown) disposed therein, a separator 14 on the bottom of the tray 12, a shaft 16, a feed arm 18, and a feed roller 19 at an end of the feed arm 18. As shown in FIG. 1, the feed arm 18 is pivotally connected to the shaft 16, and the shaft 16 is mounted to the side walls of the tray 12.
  • Generally, the sheet stack is pressed and fed by the feed roller 19, wherein the feed arm 18 is rotatable around the shaft 16 to adjust the angle thereof for feeding sheets of various thicknesses. When feeding, the lower sheets of the sheet stack are buckled by the separator 14, and only the top sheet is fed. However, when the sheets are improperly disposed in the tray 12 and exceed the separator 14, accidental feeding of multiple sheets may occur.
    • BRIEF SUMMARY OF THE INVENTION
  • Media-feed mechanisms for business machines are provided. A media-feed mechanism comprises a frame, a stopper, a rotary member, and a swing gear mechanism. The rotary member comprises a cam contacting the stopper and a driven gear fixed to the cam. When the gear mechanism is in a first position, a first gear thereof engages the driven gear and drives the cam rotating in a first direction, to impel the stopper from a first angle to a second angle. When the swing gear mechanism is in a second position, a second gear thereof engages the driven gear and drives the cam rotating in the first direction, such that the stopper rotates from the second angle to the first angle.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:
  • FIG. 1 is a perspective diagram of a conventional media-feed assembly;
  • FIG. 2 is a perspective diagram of an embodiment of a media-feed assembly;
  • FIG. 3 is a perspective diagram of an embodiment of a stopper;
  • FIG. 4 is a perspective diagram of a first gear engaged with a driven gear;
  • FIG. 5 is a perspective diagram of a first gear disengaged from a driven gear when meeting a toothless potion thereof;
  • FIG. 6 is a perspective diagram of a second gear engaged with a driven gear; and
  • FIG. 7 is a perspective diagram of a second gear disengaged from a driven gear when meeting a toothless potion thereof.
    •  DETAILED DESCRIPTION OF THE INVENTION
  • Referring to FIG. 2, a media-feed assembly of a business machine primarily comprises a frame H, a stopper 51, a rotary member 61, and a swing gear mechanism 71. In this embodiment, the stopper 51, the rotary member 61, and the swing gear mechanism 71 are pivotally connected to the frame H. The frame H comprises a tray 41 with a sheet stack S disposed therein. The top sheet S1 of the sheet stack S is fed by a roller connected to the frame H, such as the feed roller 19 shown in FIG. 1, along a feeding direction A. The stopper 51 is rotatable with respect to the frame H to selectively guide or block the sheets, preventing feeding of multiple sheets.
  • As shown in FIG. 3, the stopper 51 comprises a shaft 51 a pivotally connected to the frame H and a contact portion 51 b extending from the shaft 51 a, wherein the contact portion 51 b has a nub 51 c, such as an elastomer. Referring to FIG. 4, the rotary member 61 comprises a cam 61 a and a driven gear 61 b fixed to the cam 61 a. In this embodiment, the cam 61 a and the driven gear 61 b are monolithically formed in one piece, and the driven gear 61 b comprises an irregular toothless portion 61 b′. Specifically, the driven gear 61 b and the cam 61 a are rotatable around a central axis C thereof, and the nub 51 c maintains contact with an outer surface of the cam 61 a.
  • As shown in FIG. 4, the swing gear mechanism 71 comprises an arm 72, a driving gear 73, a first gear train 74, and a second gear train 75, wherein the driving gear 73 and first and second gear trains 74 and 75 are rotatably connected to the arm 72. As shown in FIG. 4, the first and second gear trains 74 and 75 are engaged with the driving gear 73 from opposite sides thereof, wherein the first gear train 74 has a first gear 741, and the second gear train 75 has two second gears 751. In some embodiments, the first gear train 74 may have an odd number (such as three or five) of first gears 741, and the second gear train 75 may have an even number (such as four or six) of second gears 751.
  • In FIG. 4, the contact portion 51 b and the sheets S form an included angle α, and the sheets S are blocked by the contact portion 51 b from falling along direction A. When feeding the sheets S, the swing gear mechanism 71 rotates to a first position as shown in FIG. 4, such that the first gear 741 at the end of the first gear train 74 engages with the driven gear 61 b of the rotary member 61. Subsequently, with clockwise rotation of the driving gear 73, the driven gear 61 b and the cam 61 a are rotated along a first direction A1 (clockwise), such that the contact portion 51 b descends from the angle α to the angle β (shown in FIG. 5), wherein β>α.
  • When the contact portion 51 b rotates to the angle β, as shown in FIG. 5, the first gear 741 meets the toothless portion 61 b′ and disengages from the driven gear 61 b, such that the contact portion 51 b is held in the angle β. Hence, the top sheet S1 of the sheet stack S can be fed by the feed roller.
  • After feeding, the swing gear mechanism 71 is reversely rotated with the driving gear 73 (counterclockwise) from the first position to a second position, as shown in FIG. 6, such that a second gear 751 at the end of the second gear train 75 is engaged with the driven gear 61 b. Similarly, the cam 61 of the rotary member 61 is driven to rotate along the first direction A1 (clockwise) until the second gear 751 meets the toothless portion 61 b′, as shown in FIG. 7, such that the contact portion 51 b is lifted to the angle α.
  • With rotation of the rotary member 61 along the first direction A1, the contact portion 51 b returns from the angle β shown in FIG. 6 to the angle α shown in FIG. 7. Here, the swing gear mechanism 71 is disengaged from the driven gear 61 b when the second gear 751 meets the toothless portion 61 b′, such that the contact portion 51 b can be held in angle β to block the sheets S from falling along the direction A.
  • To switch the media-feed assembly from the state shown in FIG. 7 to the state shown in FIG. 5 for feeding, first, the swing gear mechanism 71 is reversely rotated with the driving gear 73 (clockwise) and returned from the second position to the first position shown in FIG. 4. Subsequently, the cam 61 a is driven by the first gear 741 to rotate along a first direction A1 (clockwise), such that the contact portion 51 b descends from the angle α to the angle β, as shown in FIG. 5.
  • Media-feed assemblies are provided according to the embodiments. When the swing gear mechanism 71 is in the first position, the driving gear 73 rotates the cam 61 a along the first direction A1, such that the contact portion 51 b of the stopper 51 descends from the angle α (shown in FIG. 4) to the angle β (shown in FIG. 5). Alternatively, when the swing gear mechanism 71 is in the second position, the driving gear 73 rotates the cam 61 a along the first direction A1, such that the contact portion 51 b of the stopper 51 is lifted from the angle β (shown in FIG. 6) to the angle α (shown in FIG. 7). Specifically, when the first gear 741 or the second gear 751 meets the toothless portion 61 b′ of the driven gear 61 b, the swing gear mechanism 71 is disengaged from the driven gear 61 b, such that the contact portion 51 b can be selectively held in the angle α or the angle β, to prevent accidental feeding of multiple sheets.
  • While the invention has been described by way of example and in terms of preferred embodiment, it is to be understood that the invention is not limited thereto. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.

Claims (13)

1. A media-feed assembly of a business machine, comprising:
a frame, comprising a tray with at least one media sheet disposed therein;
a stopper, pivotally connected to the frame and rotatable with respect to the media sheet between a first angle and a second angle;
a swing gear mechanism, pivotally connected to the frame, comprising a driving gear, a first gear train, and a second gear train, wherein the first and second gear trains are engaged with the driving gear; and
a rotary member, comprising a cam contacting the stopper and a driven gear fixed to the cam, the driven gear comprising an irregular toothless portion, wherein when the swing gear mechanism is in a first position, the first gear train is engaged with the driven gear, to rotate the cam along a first direction and impel the stopper from the first angle to the second angle, and when the swing gear mechanism is in a second position, the second gear train is engaged with the driven gear, to rotate the cam along the first direction and return the stopper from the second angle to the second angle.
2. The media-feed assembly as claimed in claim 1, wherein when the first gear train meets the toothless portion of the driven gear, the swing gear mechanism is disengaged from the driven gear, and the stopper is held in the second angle.
3. The media-feed assembly as claimed in claim 1, wherein when the second gear train meets the toothless portion of the driven gear, the swing gear mechanism is disengaged from the driven gear, and the stopper is held in the first angle.
4. The media-feed assembly as claimed in claim 1, wherein the stopper comprises a shaft pivotally connected to the frame and a contact portion in contact with the cam.
5. The media-feed assembly as claimed in claim 4, wherein the contact portion comprises a nub in contact with the cam.
6. The media-feed assembly as claimed in claim 5, wherein the nub is an elastomer.
7. The media-feed assembly as claimed in claim 1, further comprising a feed roller connected to the frame, wherein the media sheet is fed by the feed roller when the stopper is in the second angle.
8. The media-feed assembly as claimed in claim 7, wherein the media sheet is blocked from feeding by the stopper when the stopper is in the first angle.
9. The media-feed assembly as claimed in claim 7, wherein the second angle exceeds the first angle.
10. The media-feed assembly as claimed in claim 1, wherein the first gear train comprises an odd number of first gears, and the second gear train comprises an even number of second gears.
11. The media-feed assembly as claimed in claim 1, wherein the swing gear mechanism further comprises an arm with the first and second gear trains rotatably connected thereto.
12. The media-feed assembly as claimed in claim 1, wherein the swing gear mechanism is moved between the first and second positions with the driving gear.
13. The media-feed assembly as claimed in claim 1, wherein the driven gear and the cam are monolithically formed in one piece.
US11/850,870 2006-09-08 2007-09-06 Media-feed assemblies Abandoned US20080061494A1 (en)

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TW95133203 2006-09-08
TW095133203A TWI304021B (en) 2006-09-08 2006-09-08 Media-feed mechanisms

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