US20020074710A1 - Paper pick-up mechanism of an automatic document feeder - Google Patents
Paper pick-up mechanism of an automatic document feeder Download PDFInfo
- Publication number
- US20020074710A1 US20020074710A1 US09/773,080 US77308001A US2002074710A1 US 20020074710 A1 US20020074710 A1 US 20020074710A1 US 77308001 A US77308001 A US 77308001A US 2002074710 A1 US2002074710 A1 US 2002074710A1
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- United States
- Prior art keywords
- frame
- pick
- paper
- friction
- document feeder
- 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.)
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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
- B65H3/0684—Rollers or like rotary separators on moving support, e.g. pivoting, for bringing the roller or like rotary separator into contact with the pile
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H1/00—Supports or magazines for piles from which articles are to be separated
- B65H1/26—Supports or magazines for piles from which articles are to be separated with auxiliary supports to facilitate introduction or renewal of the pile
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2403/00—Power transmission; Driving means
- B65H2403/70—Clutches; Couplings
- B65H2403/73—Couplings
- B65H2403/731—Slip couplings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
- B65H2404/10—Rollers
- B65H2404/15—Roller assembly, particular roller arrangement
- B65H2404/152—Arrangement of roller on a movable frame
- B65H2404/1521—Arrangement of roller on a movable frame rotating, pivoting or oscillating around an axis, e.g. parallel to the roller axis
Definitions
- the present invention relates to a paper pick-up mechanism of an automatic document feeder used for a scanning device, a photocopying machine, a printing machine, or a faxing machine etc.
- An automatic document feeder is mounted on an image capturing device or a printing device, so that multiple sheets of papers can be continuously input.
- the paper tray in the ADF equipment is usually arranged with an inclined angle greater than 15 degrees, whereby when the paper is placed in the paper tray, it can slide into a paper stand-by position by its own weight.
- This kind of inclined design has the function of feeding paper automatically. However, it occupies a large space.
- the senor detects the paper when the paper is fed, then, a power device, such as a motor, supplies power to drive a link mechanism or lever member, so that a pick-up roller sways to and contacts with the paper automatically, so as to feed paper automatically. After all of the papers are input, the sensor detects that there is no paper, the motor rotates reversely to drive the link mechanism or lever member, so that the pick-up roller may be lifted to return to the stand-by position, thereby facilitating the user placing the paper again.
- a power device such as a motor
- the pick-up roller is moved by the motor rotating normally or reversely to drive the link mechanism or lever member. Therefore, the design of the link mechanism or lever member has to be precise, and has to co-operate with other detecting and control members and related circuits, causing the design to be complicated. In addition, after the automatic document feeder accomplishes feeding papers, the motor has to rotate reversely to drive the link mechanism or lever member for lifting the pick-up roller, causing the motor to be frequently used.
- the present invention provides a design which employs the action of a friction being converted into a torque, so that a frame provided with a friction member module can away in a lever manner, thereby automatically feeding papers.
- a friction member module is frictionally and rotatably mounted on a frame, and one face of the friction member module is provided with a friction face rested on the frame.
- the friction member module When the friction member module is rotated, the friction between the frame and the friction member module exerts a torque action on the frame, so that the frame can be swayed by pivot shafts.
- the friction member module may be a friction block, or any member mounted on the frame, such as an automatic paper feeding roller, a pick-up roller, or a belt for connecting the automatic paper feeding roller and the pick-up roller.
- one end of the frame can be lifted by a lever action, thereby facilitating the user placing the paper again.
- the frame may be provided with a counterweight which acts so that one end of the frame can be lifted automatically when there is no paper, thereby facilitating the user placing the paper again.
- the frame can also be lifted automatically by an elastic member.
- the counterweight may be provided with a plurality of detachable adjusting counterweight units, thereby facilitating adjusting a counterweight proportion required for adjusting the lever motion of the frame.
- FIG. 1 is a perspective view of a paper pick-up mechanism of an automatic document feeder in accordance with the present invention
- FIG. 2 is a top plan view of the paper pick-up mechanism of an automatic document feeder as shown in FIG. 1;
- FIG. 3 is a top plan view of the paper pick-up mechanism of an automatic document feeder in accordance with another embodiment of the present invention.
- FIG. 4 is a top plan view of the paper pick-up mechanism of an automatic document feeder in accordance with a further embodiment of the present invention.
- FIG. 5 is a top plan view of the paper pick-up mechanism of an automatic document feeder in accordance with a further embodiment of the present invention.
- FIG. 6 is an operational view of the paper pick-up mechanism of an automatic document feeder as shown in FIG. 2;
- FIG. 7 is a side plan schematic operational view of the paper pick-up mechanism of an automatic document feeder as shown in FIG. 1;
- FIG. 8 is an operational view of the paper pick-up mechanism of an automatic document feeder as shown in FIG. 6;
- FIG. 9 is an operational view of the paper pick-up mechanism of an automatic document feeder as shown in FIG. 8;
- FIG. 10 is a side plan schematic operational view of the paper pickup mechanism of an automatic document feeder as shown in FIG. 1;
- FIG. 11 is a top plan view of the paper pick-up mechanism of an automatic document feeder in accordance with a further embodiment of the present invention.
- FIG. 12 is a top plan view of the paper pick-up mechanism of an automatic document feeder in accordance with a further embodiment of the present invention.
- FIG. 13 is a top plan view of the paper pick-up mechanism of an automatic document feeder in accordance with a further embodiment of the present invention.
- FIG. 14 is a top plan view of the paper pick-up mechanism of an automatic document feeder in accordance with a further embodiment of the present invention.
- FIG. 15 is a top plan view of the paper pick-up mechanism of an automatic document feeder in accordance with a further embodiment of the present invention.
- FIG. 16 is a perspective view of the paper pick-up mechanism of an automatic document feeder in accordance with a further embodiment of the present invention.
- a paper pick-up mechanism of an automatic document feeder (ADF) in accordance with the present invention comprises a frame 11 , a pick-up roller 21 rotatably mounted on the frame 11 , an automatic paper feeding roller 31 rotatably mounted on the frame 11 relative to the pick-up roller 21 , and a friction member module 41 frictionally mounted on the frame 11 and in contact with the frame 11 .
- the pick-up roller 21 and the automatic paper feeding roller 31 may be individual or be associated to be called a pick-up member for providing an automatic paper feeding function.
- the pick-up roller 21 is axially provided with a shaft 22 which is located adjacent to a first end face 12 of the frame 11 .
- the shaft 22 has a first end 23 pivoted on a first side 14 of the frame 11 , and a second end 24 pivoted on a second side 15 of the frame 11 .
- the automatic paper feeding roller 31 is axially provided with a shaft 32 which is located adjacent to a second end face 13 of the frame 11 .
- the shaft 32 has a first end 33 extending through the first side 14 of the frame 11 and pivoted to a first side 52 of a platform 51 , and a second end 34 extending through the second side 15 of the frame 11 and pivoted to a second side 53 of the platform 51 . Accordingly, the frame 11 is supported by the shaft 32 to form a hanging shape and can be swayed.
- the pick-up roller 21 and the automatic paper feeding roller 31 are oppositely installed in the frame 11 , and the shaft 22 is provided with a gear 61 located adjacent to the second end 24 .
- the shaft 32 is provided with a gear 62 , and a belt 63 is mounted between the two gears 61 and 62 , so that the pick-up roller 21 and the automatic paper feeding roller 31 may be rotated synchronously at the same speed.
- the friction member module 41 may be a friction block 43 made of rubber, which is mounted on the first end 23 of the shaft 22 of the pick-up roller 21 , and has one end provided with a contact face 42 rested on the first side 14 of the frame 11 .
- the friction member module 41 may be mounted on the second end 24 of the shaft 22 of the pick-up roller 21 , and has one end provided with a contact face 42 rested on the second side 15 of the frame 11 .
- the friction member module 41 may be mounted on the shaft 32 of the automatic paper feeding roller 31 , and has one end provided with a contact face 42 rested on the first side 14 of the frame 11 .
- the friction member module 41 may be mounted on the shaft 32 of the automatic paper feeding roller 31 , and has one end provided with a contact face 42 rested on the second side 15 of the frame 11 .
- the second end face 13 of the frame 11 is provided with a counterweight 71
- the second end 34 of the shaft 32 is provided with a clutch block 72 which is provided with a flange 73 .
- the second end 34 of the shaft 32 is fitted with a transmission member 74 which is axially provided with a flange 75 mating with the flange 73 of the clutch block 72 whereby the flange 75 of the transmission member 74 may be rested on or detached from the flange 73 of the clutch block 72 , thereby forming a one-way clutch.
- one side of the transmission member 74 is provided with another transmission member 76 which can supply power to the transmission member 74 .
- the friction member module 41 mounted on the first end 23 of the shaft 22 may be rotated synchronously.
- the friction face 42 of the friction member module 41 contacts the first side 14 of the frame 11 , whereby the friction between the friction member module 41 and the frame 11 is converted into a torque which is acted on the frame 11 .
- the frame 11 co-operates with the shaft 32 of the automatic paper feeding roller 31 to sway in a lever manner, so that the first end face 12 of the frame 11 is swayed downward.
- a paper feeding roller 78 is mounted on the rear of the second end face 13 of the frame 11 , and has a rotational speed greater than that of the transmission member 76 . Therefore, during paper feeding process of the paper 77 , the paper 77 is rapidly pulled by the paper feeding roller 78 once the paper 77 contacts the paper feeding roller 78 . Meanwhile, the contact portion of the paper 77 with the automatic paper feeding roller 31 will accelerate the automatic paper feeding roller 31 and the shaft 32 , whereby the rotational angle of the shaft 32 is greater than that of the transmission member 74 , so that the flange 73 of the clutch block 72 exceeds and detach the flange 75 of the transmission member 74 .
- the automatic paper feeding roller 31 and the pick-up roller 21 are rotated continuously, whereby the friction member module 41 exerts a torque on the frame 11 continuously, so that the pick-up roller 21 contacts the paper 77 , thereby preventing the frame 11 from being not able to sway downward due to the flange 73 of the clutch block 72 being detached from the flange 75 of the transmission member 74 .
- the flange 75 of the transmission member 74 cannot catch up with the flange 73 of the clutch block 72 due to the differential of the rotational speed.
- the automatic paper feeding roller 31 is located at a stationary state, so that the next paper 77 cannot be fed.
- the shaft 32 and the automatic paper feeding roller 31 are rotated, while the pick-up roller 21 is also rotated synchronously at the same speed, to drive the paper 77 to move forward. Accordingly, two sheets of adjacent papers 77 are spaced with a distance, so that the papers 77 can be moved separately.
- the transmission member 76 will stop operating when the sensor detects that the last paper 77 leaves the automatic paper feeding roller 31 , so that the transmission member 74 stops operating.
- the flange 73 of the clutch block 72 is spaced from the flange 75 of the transmission member 74 with a distance.
- the frame 11 is subjected to the action of the counterweight 71 co-operating with the distance of the flanges 73 and 75 , so that the second end face 13 is swayed downward, thereby lifting the first end face 12 and facilitating the user placing the paper 77 under the frame 11 .
- the friction member module 41 used in the present invention is not limited to use the friction block 43 .
- the friction member module 41 may be other member mounted in the frame 11 for producing the automatic papers feeding function.
- one end of the automatic paper feeding roller 31 is provided with a friction face 81 which is rested on the first side face 14 of the frame 11 .
- the friction face 81 exerts a torque on the frame 11 , thereby forcing the frame 11 to sway downward in order to feed the paper automatically.
- one side of the belt 63 for connecting the shaft 32 of the automatic paper feeding roller 31 and the shaft 22 of the pick-up roller 21 is provided with a friction face 82 which is rested on the second side face 15 of the frame 11 .
- the friction face 82 exerts a torque on the second side 15 of the frame 11 , thereby forcing the frame 11 to sway downward to feed the paper automatically.
- one end of the automatic pick-up roller 21 is provided with a friction face 84 which is rested on the first side face 14 of the frame 11 .
- the friction face 84 exerts a torque on the frame 11 , thereby forcing the first side 14 of the frame 11 to sway downward to feed the paper automatically.
- a tension adjustable spring 85 mounted on the first end 23 of the shaft 22 acts on the friction block 43 to provide an urging force of the contact face 42 of the friction block 43 with the first side 14 of the frame 11 .
- one end of the spring 85 is provided with an adjusting block 86 which may be displaced with rotation, for adjusting a normal force of the friction block 43 on the first side 14 of the frame 11 at shipping, so that the torque produced by the friction is large enough to force the frame 11 to sway.
- the inner wall of the second side 15 of the frame 11 is provided with a protrusion 87 , whereby when the belt 63 is rotated, the friction produced by the friction face 82 in contact with the protrusion 87 will force the frame 11 to sway.
- the gear 61 or the gear 62 remains a frictional relationship with the second side 15 of the frame 11 , thereby also achieving the effect of swaying the frame 11 .
- the counterweight 71 is further provided with a plurality of detachable adjusting counterweight units 83 , thereby facilitating adjusting a counterweight proportion required for adjusting a lever motion of the frame 11 , so that the frame 11 can be swayed more conveniently and sensibly.
- a spring (not shown) may be used to replace the counterweight 71 or the adjusting counterweight units 83 , so that the frame 11 can be automatically swayed to a stand-by position by action of the spring, thereby facilitating the user sending the next batch of papers to be processed.
- the spring is mounted between the frame 11 and the platform 51 without affecting paper feeding, so that the frame 11 can be automatically swayed to a stand-by position when the torque is removed.
- the present invention employs the action of a friction being converted into a torque, so that the frame 11 can away in a lever manner.
- the frame 11 co-operates with the friction member module 41 to simplifying the construction. Further, one end of the frame 11 can be lifted automatically without any power by means of the design of the counterweight 71 , thereby reducing use of the motor.
Abstract
The present invention includes at least one friction member module frictionally and rotatably mounted on a frame. When the friction member module is rotated, the friction between the frame and the friction member module is converted into a torque which is exerted on the frame, so that the frame can be swayed to a paper taking position, thereby facilitating feeding paper automatically.
Description
- 1. Field of the Invention
- The present invention relates to a paper pick-up mechanism of an automatic document feeder used for a scanning device, a photocopying machine, a printing machine, or a faxing machine etc.
- 2. Description of the Related Prior Art
- An automatic document feeder (ADF) is mounted on an image capturing device or a printing device, so that multiple sheets of papers can be continuously input. The paper tray in the ADF equipment is usually arranged with an inclined angle greater than 15 degrees, whereby when the paper is placed in the paper tray, it can slide into a paper stand-by position by its own weight. This kind of inclined design has the function of feeding paper automatically. However, it occupies a large space.
- The closest prior art of which the applicant is aware is disclosed in U.S. Pat. No. 5,344,134, which disclosed an automatic document feeder of a platform type.
- In the automatic document feeder of an inclined type or a platform type, the sensor detects the paper when the paper is fed, then, a power device, such as a motor, supplies power to drive a link mechanism or lever member, so that a pick-up roller sways to and contacts with the paper automatically, so as to feed paper automatically. After all of the papers are input, the sensor detects that there is no paper, the motor rotates reversely to drive the link mechanism or lever member, so that the pick-up roller may be lifted to return to the stand-by position, thereby facilitating the user placing the paper again.
- In such a manner, the pick-up roller is moved by the motor rotating normally or reversely to drive the link mechanism or lever member. Therefore, the design of the link mechanism or lever member has to be precise, and has to co-operate with other detecting and control members and related circuits, causing the design to be complicated. In addition, after the automatic document feeder accomplishes feeding papers, the motor has to rotate reversely to drive the link mechanism or lever member for lifting the pick-up roller, causing the motor to be frequently used.
- The present invention provides a design which employs the action of a friction being converted into a torque, so that a frame provided with a friction member module can away in a lever manner, thereby automatically feeding papers.
- For achieving the above objective, a friction member module is frictionally and rotatably mounted on a frame, and one face of the friction member module is provided with a friction face rested on the frame. When the friction member module is rotated, the friction between the frame and the friction member module exerts a torque action on the frame, so that the frame can be swayed by pivot shafts.
- The friction member module may be a friction block, or any member mounted on the frame, such as an automatic paper feeding roller, a pick-up roller, or a belt for connecting the automatic paper feeding roller and the pick-up roller.
- When there is no paper, one end of the frame can be lifted by a lever action, thereby facilitating the user placing the paper again. The frame may be provided with a counterweight which acts so that one end of the frame can be lifted automatically when there is no paper, thereby facilitating the user placing the paper again. The frame can also be lifted automatically by an elastic member.
- The counterweight may be provided with a plurality of detachable adjusting counterweight units, thereby facilitating adjusting a counterweight proportion required for adjusting the lever motion of the frame.
- Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
- FIG. 1 is a perspective view of a paper pick-up mechanism of an automatic document feeder in accordance with the present invention;
- FIG. 2 is a top plan view of the paper pick-up mechanism of an automatic document feeder as shown in FIG. 1;
- FIG. 3 is a top plan view of the paper pick-up mechanism of an automatic document feeder in accordance with another embodiment of the present invention;
- FIG. 4 is a top plan view of the paper pick-up mechanism of an automatic document feeder in accordance with a further embodiment of the present invention;
- FIG. 5 is a top plan view of the paper pick-up mechanism of an automatic document feeder in accordance with a further embodiment of the present invention;
- FIG. 6 is an operational view of the paper pick-up mechanism of an automatic document feeder as shown in FIG. 2;
- FIG. 7 is a side plan schematic operational view of the paper pick-up mechanism of an automatic document feeder as shown in FIG. 1;
- FIG. 8 is an operational view of the paper pick-up mechanism of an automatic document feeder as shown in FIG. 6;
- FIG. 9 is an operational view of the paper pick-up mechanism of an automatic document feeder as shown in FIG. 8;
- FIG. 10 is a side plan schematic operational view of the paper pickup mechanism of an automatic document feeder as shown in FIG. 1;
- FIG. 11 is a top plan view of the paper pick-up mechanism of an automatic document feeder in accordance with a further embodiment of the present invention;
- FIG. 12 is a top plan view of the paper pick-up mechanism of an automatic document feeder in accordance with a further embodiment of the present invention;
- FIG. 13 is a top plan view of the paper pick-up mechanism of an automatic document feeder in accordance with a further embodiment of the present invention;
- FIG. 14 is a top plan view of the paper pick-up mechanism of an automatic document feeder in accordance with a further embodiment of the present invention;
- FIG. 15 is a top plan view of the paper pick-up mechanism of an automatic document feeder in accordance with a further embodiment of the present invention; and
- FIG. 16 is a perspective view of the paper pick-up mechanism of an automatic document feeder in accordance with a further embodiment of the present invention.
- Referring to the drawings and initially to FIGS. 1 and 2, a paper pick-up mechanism of an automatic document feeder (ADF) in accordance with the present invention comprises a
frame 11, a pick-up roller 21 rotatably mounted on theframe 11, an automaticpaper feeding roller 31 rotatably mounted on theframe 11 relative to the pick-up roller 21, and afriction member module 41 frictionally mounted on theframe 11 and in contact with theframe 11. The pick-up roller 21 and the automaticpaper feeding roller 31 may be individual or be associated to be called a pick-up member for providing an automatic paper feeding function. - The pick-
up roller 21 is axially provided with ashaft 22 which is located adjacent to afirst end face 12 of theframe 11. Theshaft 22 has afirst end 23 pivoted on afirst side 14 of theframe 11, and asecond end 24 pivoted on asecond side 15 of theframe 11. - The automatic
paper feeding roller 31 is axially provided with ashaft 32 which is located adjacent to asecond end face 13 of theframe 11. Theshaft 32 has afirst end 33 extending through thefirst side 14 of theframe 11 and pivoted to afirst side 52 of aplatform 51, and asecond end 34 extending through thesecond side 15 of theframe 11 and pivoted to asecond side 53 of theplatform 51. Accordingly, theframe 11 is supported by theshaft 32 to form a hanging shape and can be swayed. - The pick-
up roller 21 and the automaticpaper feeding roller 31 are oppositely installed in theframe 11, and theshaft 22 is provided with agear 61 located adjacent to thesecond end 24. Theshaft 32 is provided with agear 62, and abelt 63 is mounted between the twogears up roller 21 and the automaticpaper feeding roller 31 may be rotated synchronously at the same speed. - The
friction member module 41 may be afriction block 43 made of rubber, which is mounted on thefirst end 23 of theshaft 22 of the pick-up roller 21, and has one end provided with acontact face 42 rested on thefirst side 14 of theframe 11. - Referring to FIG. 3, the
friction member module 41 may be mounted on thesecond end 24 of theshaft 22 of the pick-up roller 21, and has one end provided with acontact face 42 rested on thesecond side 15 of theframe 11. - Referring to FIG. 4, the
friction member module 41 may be mounted on theshaft 32 of the automaticpaper feeding roller 31, and has one end provided with acontact face 42 rested on thefirst side 14 of theframe 11. Referring to FIG. 5, thefriction member module 41 may be mounted on theshaft 32 of the automaticpaper feeding roller 31, and has one end provided with acontact face 42 rested on thesecond side 15 of theframe 11. - Again referring to FIGS. 1 and 2, the
second end face 13 of theframe 11 is provided with acounterweight 71, while thesecond end 34 of theshaft 32 is provided with aclutch block 72 which is provided with aflange 73. Thesecond end 34 of theshaft 32 is fitted with atransmission member 74 which is axially provided with aflange 75 mating with theflange 73 of theclutch block 72 whereby theflange 75 of thetransmission member 74 may be rested on or detached from theflange 73 of theclutch block 72, thereby forming a one-way clutch. In addition, one side of thetransmission member 74 is provided with anothertransmission member 76 which can supply power to thetransmission member 74. - Referring to FIGS. 6 and 7, when the
transmission member 76 supplies power to thetransmission member 74, theflange 75 is rotated by thetransmission member 74 to abut theflange 73 of theclutch block 72, thereby driving and rotating theshaft 32. Theshaft 32 during rotation may rotate the automaticpaper feeding roller 31, while theshaft 22 and the pick-up roller 21 can also be rotated by transmission of thebelt 63, and the pick-up roller 21 and the automaticpaper feeding roller 31 may be rotated synchronously at the same speed. - When the
shaft 22 is rotated, thefriction member module 41 mounted on thefirst end 23 of theshaft 22 may be rotated synchronously. Thefriction face 42 of thefriction member module 41 contacts thefirst side 14 of theframe 11, whereby the friction between thefriction member module 41 and theframe 11 is converted into a torque which is acted on theframe 11. In such a manner, theframe 11 co-operates with theshaft 32 of the automaticpaper feeding roller 31 to sway in a lever manner, so that thefirst end face 12 of theframe 11 is swayed downward. - Accordingly, when the sensor (not shown) detects that the
paper 77 is placed between theplatform 51 and theframe 11, theframe 11 is swayed downward by the friction being converted into the torque, so that the pick-uproller 21 contacts thepaper 77. - Referring to FIGS. 7 and 8, a
paper feeding roller 78 is mounted on the rear of thesecond end face 13 of theframe 11, and has a rotational speed greater than that of thetransmission member 76. Therefore, during paper feeding process of thepaper 77, thepaper 77 is rapidly pulled by thepaper feeding roller 78 once thepaper 77 contacts thepaper feeding roller 78. Meanwhile, the contact portion of thepaper 77 with the automaticpaper feeding roller 31 will accelerate the automaticpaper feeding roller 31 and theshaft 32, whereby the rotational angle of theshaft 32 is greater than that of thetransmission member 74, so that theflange 73 of theclutch block 72 exceeds and detach theflange 75 of thetransmission member 74. - The automatic
paper feeding roller 31 and the pick-uproller 21 are rotated continuously, whereby thefriction member module 41 exerts a torque on theframe 11 continuously, so that the pick-uproller 21 contacts thepaper 77, thereby preventing theframe 11 from being not able to sway downward due to theflange 73 of theclutch block 72 being detached from theflange 75 of thetransmission member 74. - Before the distal end of the
paper 77 leaves the automaticpaper feeding roller 31, theflange 75 of thetransmission member 74 cannot catch up with theflange 73 of theclutch block 72 due to the differential of the rotational speed. After the distal end of thepaper 77 leaves the automaticpaper feeding roller 31, the automaticpaper feeding roller 31 is located at a stationary state, so that thenext paper 77 cannot be fed. When theflange 75 of thetransmission member 74 catches up with theflange 73 of theclutch block 72, theshaft 32 and the automaticpaper feeding roller 31 are rotated, while the pick-uproller 21 is also rotated synchronously at the same speed, to drive thepaper 77 to move forward. Accordingly, two sheets ofadjacent papers 77 are spaced with a distance, so that thepapers 77 can be moved separately. - Referring to FIGS. 9 and 10, the
transmission member 76 will stop operating when the sensor detects that thelast paper 77 leaves the automaticpaper feeding roller 31, so that thetransmission member 74 stops operating. At this time, theflange 73 of theclutch block 72 is spaced from theflange 75 of thetransmission member 74 with a distance. Theframe 11 is subjected to the action of thecounterweight 71 co-operating with the distance of theflanges second end face 13 is swayed downward, thereby lifting thefirst end face 12 and facilitating the user placing thepaper 77 under theframe 11. - The
friction member module 41 used in the present invention is not limited to use thefriction block 43. In the other embodiments of the present invention, thefriction member module 41 may be other member mounted in theframe 11 for producing the automatic papers feeding function. Referring to FIG. 11, one end of the automaticpaper feeding roller 31 is provided with afriction face 81 which is rested on thefirst side face 14 of theframe 11. Thus, when the automaticpaper feeding roller 31 is rotated, thefriction face 81 exerts a torque on theframe 11, thereby forcing theframe 11 to sway downward in order to feed the paper automatically. - Referring to FIG. 12, one side of the
belt 63 for connecting theshaft 32 of the automaticpaper feeding roller 31 and theshaft 22 of the pick-uproller 21 is provided with afriction face 82 which is rested on thesecond side face 15 of theframe 11. Thus, when thebelt 63 is rotated, thefriction face 82 exerts a torque on thesecond side 15 of theframe 11, thereby forcing theframe 11 to sway downward to feed the paper automatically. - Referring to FIG. 13, one end of the automatic pick-up
roller 21 is provided with afriction face 84 which is rested on thefirst side face 14 of theframe 11. Thus, when the automatic pick-uproller 21 is rotated, thefriction face 84 exerts a torque on theframe 11, thereby forcing thefirst side 14 of theframe 11 to sway downward to feed the paper automatically. - Referring to FIG. 14, a tension
adjustable spring 85 mounted on thefirst end 23 of theshaft 22 acts on thefriction block 43 to provide an urging force of thecontact face 42 of thefriction block 43 with thefirst side 14 of theframe 11. For example, one end of thespring 85 is provided with an adjustingblock 86 which may be displaced with rotation, for adjusting a normal force of thefriction block 43 on thefirst side 14 of theframe 11 at shipping, so that the torque produced by the friction is large enough to force theframe 11 to sway. - Referring to FIG. 15, according to another embodiment of the present invention, the inner wall of the
second side 15 of theframe 11 is provided with aprotrusion 87, whereby when thebelt 63 is rotated, the friction produced by thefriction face 82 in contact with theprotrusion 87 will force theframe 11 to sway. - According to another embodiment not shown in the figures, the
gear 61 or thegear 62 remains a frictional relationship with thesecond side 15 of theframe 11, thereby also achieving the effect of swaying theframe 11. - Referring to FIG. 16, the
counterweight 71 is further provided with a plurality of detachableadjusting counterweight units 83, thereby facilitating adjusting a counterweight proportion required for adjusting a lever motion of theframe 11, so that theframe 11 can be swayed more conveniently and sensibly. - According to another embodiment not shown in the figures, a spring (not shown) may be used to replace the
counterweight 71 or the adjustingcounterweight units 83, so that theframe 11 can be automatically swayed to a stand-by position by action of the spring, thereby facilitating the user sending the next batch of papers to be processed. For example, the spring is mounted between theframe 11 and theplatform 51 without affecting paper feeding, so that theframe 11 can be automatically swayed to a stand-by position when the torque is removed. - Accordingly, the present invention employs the action of a friction being converted into a torque, so that the
frame 11 can away in a lever manner. In addition, theframe 11 co-operates with thefriction member module 41 to simplifying the construction. Further, one end of theframe 11 can be lifted automatically without any power by means of the design of thecounterweight 71, thereby reducing use of the motor. - It should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
Claims (9)
1. A paper pick-up mechanism of an automatic document feeder, comprising:
a frame;
at least one pick-up member, rotatably mounted on the frame; and
at least one friction member module, frictionally mounted on the frame and in contact with the frame, wherein, the friction member module exerts a torque action on the frame by friction during rotation, so that the frame sways, and the pick-up member can automatically pick up paper.
2. The paper pick-up mechanism of an automatic document feeder in accordance with claim 1 , wherein the friction member module is a friction block which moves in concert with the pick-up member, and has one end provided with a friction face in contact with a surface of the frame.
3. The paper pick-up mechanism of an automatic document feeder in accordance with claim 1 , wherein the friction member module is integrally formed with the pick-up member, and the pick-up member has one end provided with a friction face rested on the frame.
4. The paper pick-up mechanism of an automatic document feeder in accordance with claim 1 , wherein the friction member module is a belt mounted on the frame for driving the pick-up member, and the belt has one side provided with a friction face rested on the frame.
5. The paper pick-up mechanism of an automatic document feeder in accordance with claim 1 , wherein the friction member module co-operates with a tension adjustable spring for adjusting a normal force on the frame.
6. The paper pick-up mechanism of an automatic document feeder in accordance with claim 4 , wherein the frame is provided with a protrusion in contact with the friction face of the belt.
7. The paper pick-up mechanism of an automatic document feeder in accordance with claim 1 , wherein the frame has one end provided with a counterweight, so that the frame can be swayed to a stand-by position by action of the counterweight when there is no paper.
8. The paper pick-up mechanism of an automatic document feeder in accordance with claim 7 , wherein the counterweight is provided with a plurality of detachable adjusting counterweight units, thereby facilitating adjusting a counterweight proportion required for adjusting a lever motion of the frame.
9. The paper pick-up mechanism of an automatic document feeder in accordance with claim 1 , wherein the frame is provided with a spring, so that the frame can be swayed to a stand-by position by action of the spring when there is no paper.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW89127051A | 2000-12-18 | ||
TW089127051A TW476708B (en) | 2000-12-18 | 2000-12-18 | Paper pick-up mechanism of automatic document feeder |
TW89127051 | 2000-12-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020074710A1 true US20020074710A1 (en) | 2002-06-20 |
US6457706B1 US6457706B1 (en) | 2002-10-01 |
Family
ID=21662366
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/773,080 Expired - Lifetime US6457706B1 (en) | 2000-12-18 | 2001-02-01 | Paper pick-up mechanism of an automatic document feeder |
Country Status (2)
Country | Link |
---|---|
US (1) | US6457706B1 (en) |
TW (1) | TW476708B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060226592A1 (en) * | 2005-03-29 | 2006-10-12 | Lexmark International Inc. | Apparatus providing reduction in media skew during a sheet picking operation |
US20070081199A1 (en) * | 2005-08-31 | 2007-04-12 | Yuji Koga | Sheet supplying apparatus and image recording apparatus including same |
JP2016160022A (en) * | 2015-02-27 | 2016-09-05 | ブラザー工業株式会社 | Sheet conveyance device and image reading device |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7926803B2 (en) * | 2007-01-31 | 2011-04-19 | Hewlett-Packard Development Company, L.P. | Media drive |
TWI452891B (en) * | 2009-04-09 | 2014-09-11 | Avision Inc | Sheet feeder with sheet stopping function and scan apparatus using the same |
TWI381948B (en) * | 2010-06-25 | 2013-01-11 | Primax Electronics Ltd | Pickup module of automatic feeding apparatus |
JP2015067388A (en) * | 2013-09-27 | 2015-04-13 | キヤノン株式会社 | Sheet feeding device, image reading device, and image forming apparatus |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0455239A (en) * | 1990-06-25 | 1992-02-21 | Mita Ind Co Ltd | Sheet feeding device |
GB2312667B (en) * | 1996-05-02 | 2000-09-06 | Lexmark Int Inc | Sheet separator |
US6382619B1 (en) * | 2000-04-19 | 2002-05-07 | Hewlett-Packard Company | Pick mechanism and image forming device including the same |
US6352256B1 (en) * | 2000-07-12 | 2002-03-05 | Acer Communications And Multimedia Inc. | Media feeding system |
-
2000
- 2000-12-18 TW TW089127051A patent/TW476708B/en not_active IP Right Cessation
-
2001
- 2001-02-01 US US09/773,080 patent/US6457706B1/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060226592A1 (en) * | 2005-03-29 | 2006-10-12 | Lexmark International Inc. | Apparatus providing reduction in media skew during a sheet picking operation |
US7380783B2 (en) * | 2005-03-29 | 2008-06-03 | Lexmark International, Inc. | Apparatus providing reduction in media skew during a sheet picking operation |
US20070081199A1 (en) * | 2005-08-31 | 2007-04-12 | Yuji Koga | Sheet supplying apparatus and image recording apparatus including same |
US7692825B2 (en) * | 2005-08-31 | 2010-04-06 | Brother Kogyo Kabushiki Kaisha | Sheet supplying apparatus and image recording apparatus including same |
JP2016160022A (en) * | 2015-02-27 | 2016-09-05 | ブラザー工業株式会社 | Sheet conveyance device and image reading device |
Also Published As
Publication number | Publication date |
---|---|
TW476708B (en) | 2002-02-21 |
US6457706B1 (en) | 2002-10-01 |
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