Sheet feeding apparatus and image reading apparatus

• US 6,603,950 B2
• Filed: 11/21/2001
• Issued: 08/05/2003
• Est. Priority Date: 11/28/2000
• Status: Active Grant

• Current Assignee: Nisca Corporation (Canon Inc.)
• Original Assignee: Nisca Corporation (Canon Inc.)
• Inventors: Hamada, Masataka, Nakayama, Motoaki, Jinza, Osamu
• Primary Examiner(s): Braun, Fred L.
• Application Number:
  US09/989,691
• Publication Number:
  US 20020067939A1
• Time in Patent Office: 622 Days
• Field of Search: 399/367, 399/374, 399/381, 355/75, 358/496, 358/498
• US Class Current: 399/367
• CPC Class Codes: G03G 15/60 Apparatus which relate to the handling of originals for photographic purposes in general G03B
• CPC Class Codes: H04N 1/00519 Constructional details not otherwise provided for, e.g. housings, covers
• CPC Class Codes: H04N 1/00551 Top covers or the like
• CPC Class Codes: H04N 1/00554 Latches or hinges therefor
• CPC Class Codes: H04N 1/00559 Mounting or support of components or elements H04N1/00538 takes precedence
• CPC Class Codes: H04N 1/00588 to the scanning position H04N1/00572, H04N1/00594 take precedence
• CPC Class Codes: H04N 1/00591 from the scanning position H04N1/00572 takes precedence
• CPC Class Codes: H04N 1/00602 Feed rollers
• CPC Class Codes: H04N 1/00631 Ejecting or stacking H04N1/00641 takes precedence

Abstract

A sheet feeding apparatus includes a transport unit to transport a sheet to an image reading position, and a support frame having a sheet stacker unit to store sheets, which are made of a plastic, and a hinge member is attached to the support frame for opening and closing the support frame. A motor mounting member for supporting a motor to provide a driving force to a transport member of the transport unit is attached to the support frame between the hinge member and the transport unit as a frame reinforcement. Also, the hinge member, motor mounting member and transport unit are fixed by a connecting member, and motors are arrange on both sides of the hinge member. The structure prevents deformation of a sheet feeding apparatus with a plastic frame and improves reading accuracy while being compact and lightweight.

Claims

1. A sheet feeding apparatus disposed on an image reading apparatus to open and close an upper surface of said image reading apparatus, comprising:

a transport member for transporting a sheet to an image reading position;

a support frame made of a plastic for supporting the transport member and including a sheet stack unit to store sheets;

a hinge member attached to said support frame for opening and closing the support frame relative to the image reading apparatus;

a motor mounting member for supporting a motor driving the transport member, said motor mounting member being attached to the support frame between the hinge member and the transport member as a reinforcement of the support frame;

a first connecting member connected to the hinge member and the motor mounting member for connecting the same; and

a second connecting member connected to the transport member and the motor mounting member for connecting the same.

2. A sheet feeding apparatus according to claim 1, further comprising an adjustment member disposed in the hinge member or a portion between the hinge member and the image reading apparatus for adjusting a distance between the image reading position and the transport member.

3. A sheet feeding apparatus according to claim 1, wherein further comprising a transmission member disposed between the motor mounting member and the transport member for transmitting a driving force of the motor to the transport member.

4. A sheet feeding apparatus disposed on an image reading apparatus to open and close an upper surface of said image reading apparatus, comprising:

a transport member for transporting a sheet to a first reading region on the image reading apparatus;

a sheet pressing plate disposed adjacent to the first reading region to press a sheet on a second reading region on the image reading apparatus;

a support frame made of a plastic for supporting the transport member and the sheet pressing plate;

a motor mounting member for supporting a motor to drive the transport member;

a first hinge member attached to the support frame at a transport member side so that said motor mounting member is attached to the support frame between the first hinge member and the transport member as a reinforcement

a second hinge member attached to the support frame at a pressing plate side;

an elastic member attached to the first hinge member and having an elastic force higher than that of an elastic member of the second hinge member; and

a connecting member for connecting the first hinge member and the motor mounting member on the support frame.

5. A sheet feeding apparatus, comprising:

a transport member for transporting a sheet to an image reading position;

a support frame made of a plastic for supporting the transport member and including a sheet stacker to store sheets;

hinge members attached to the support frame at a transport member side and a sheet stacker side to be spaced apart from each other to open and close the support frame relative to a main apparatus;

a first motor between said hinge members at the transport member side and the sheet stacker side to drive the transport member for transporting the sheet to a predetermined position;

a second motor for transporting the sheet from the predetermined position; and

a motor mounting member for supporting the first motor and the second motor, said motor mounting member being attached to the frame as a reinforcement for the frame, said first and second motors being arranged on two sides of the hinge member at the transport member side.

6. A sheet feeding apparatus according to claim 5, wherein said hinge member at the transport member side is arranged with the first motor and the second motor to be overlapped with each other in a height direction.

7. A sheet feeding apparatus according to claim 5, wherein said hinge member at the transport member side has an elastic member for urging in an opening direction, and the hinge member at the sheet stacker side has an elastic member having an elastic force less than that formed at the transport member side for urging in the opening direction.

8. A sheet feeding apparatus according to claim 5, wherein said hinge member at the transport member side has an elastic member for urging in an opening direction, and said hinge member at the sheet stacker side does not have an elastic member.

9. An image reading apparatus, comprising:

image reading means for reading images on a sheet; and

a sheet feeding apparatus disposed to open and close an upper surface of the image reading apparatus, said sheet feeding apparatus including;

a transport member for transporting the sheet to an image reading position of reading means;

a support frame made of a plastic for supporting said transport member and including a sheet stack unit to store the sheets;

a hinge member attached to said support frame for opening and closing the support frame relative to the sheet feeding apparatus;

a motor mounting member for supporting a motor driving the transport member, said motor mounting member being attached to the support frame between the hinge member and the transport member as reinforcement;

a first connecting member connected to the hinge member and the motor mounting member for connecting the same; and

a second connecting member connected to the transport member and the motor mounting member for connecting the same.

10. An image reading apparatus according to claim 9, further comprising a transmission member disposed between the motor mounting member and the transport member for transmitting a driving force of the motor to the transport member.

11. A sheet feeding apparatus disposed on an image reading apparatus to open and close an upper surface of said image reading apparatus, comprising:

a transport member for transporting a sheet to an image reading position;

a support frame made of a plastic for supporting the transport member and including a sheet stack unit to store sheets;

a hinge member attached to said support frame for opening and closing the support frame relative to the image reading apparatus;

a motor mounting member for supporting a motor driving the transport member and a transport unit mounting member for supporting the transport member, said motor mounting member and said transport unit mounting member being joined together to form an angle member with a rectangular shape and attached to the support frame as a reinforcement of the support frame; and

a connecting member connected to the hinge member and a middle portion of the angle member facing the hinge member for connecting the hinge member and the angle member.

12. A sheet feeding apparatus according to claim 11, further comprising a transmission member disposed inside the angle member for transmitting a driving force of the motor to the transport member.

13. A sheet feeding apparatus according to claim 11, wherein said connecting member is connected to the motor mounting member and the transport unit mounting member of the angle member.

14. A sheet feeding apparatus according to claim 11, further comprising an adjustment member attached to the transport member for adjusting a distance of the transport member relative to a platen of image reading means.

15. A sheet feeding apparatus according to claim 11, wherein said support frame has an opening at the image reading position extending perpendicular to a sheet transfer direction.

16. A sheet feeding apparatus according to claim 11, wherein connecting member includes a first connecting member connected to the hinge member and the motor mounting member, and a second connecting member connected to the transport member and the motor mounting member.