CN100517097C - Paper feeding apparatus for image forming apparatus - Google Patents

Paper feeding apparatus for image forming apparatus Download PDF

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Publication number
CN100517097C
CN100517097C CNB2006101317230A CN200610131723A CN100517097C CN 100517097 C CN100517097 C CN 100517097C CN B2006101317230 A CNB2006101317230 A CN B2006101317230A CN 200610131723 A CN200610131723 A CN 200610131723A CN 100517097 C CN100517097 C CN 100517097C
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CN
China
Prior art keywords
paper
feed rolls
leading edge
roller
feed
Prior art date
Application number
CNB2006101317230A
Other languages
Chinese (zh)
Other versions
CN1940741A (en
Inventor
郑基喆
Original Assignee
三星电子株式会社
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
Priority to KR1020050091441A priority Critical patent/KR100701323B1/en
Priority to KR91441/05 priority
Application filed by 三星电子株式会社 filed Critical 三星电子株式会社
Publication of CN1940741A publication Critical patent/CN1940741A/en
Application granted granted Critical
Publication of CN100517097C publication Critical patent/CN100517097C/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00Registering, e.g. orientating, articles; Devices therefor
    • B65H9/10Pusher and like movable registers; Pusher or gripper devices which move articles into registered position
    • B65H9/103Pusher and like movable registers; Pusher or gripper devices which move articles into registered position acting by friction or suction on the article for pushing or pulling it into registered position, e.g. against a stop
    • B65H9/106Pusher and like movable registers; Pusher or gripper devices which move articles into registered position acting by friction or suction on the article for pushing or pulling it into registered position, e.g. against a stop using rotary driven elements as part acting on the article
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00Feeding articles separated from piles; Feeding articles to machines
    • B65H5/06Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers
    • B65H5/062Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers between rollers or balls
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00Registering, e.g. orientating, articles; Devices therefor
    • B65H9/06Movable stops or gauges, e.g. rising and falling front stops
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00Parts for transporting or guiding the handled material
    • B65H2404/10Rollers
    • B65H2404/11Details of cross-section or profile
    • B65H2404/112Means for varying cross-section
    • B65H2404/1122Means for varying cross-section for rendering elastically deformable
    • B65H2404/11221Means for varying cross-section for rendering elastically deformable involving spring
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00Parts for transporting or guiding the handled material
    • B65H2404/10Rollers
    • B65H2404/13Details of longitudinal profile
    • B65H2404/133Limited number of active elements on common axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00Parts for transporting or guiding the handled material
    • B65H2404/10Rollers
    • B65H2404/14Roller pairs
    • B65H2404/144Roller pairs with relative movement of the rollers to / from each other
    • B65H2404/1441Roller pairs with relative movement of the rollers to / from each other involving controlled actuator

Abstract

A paper feeding apparatus for an image forming apparatus efficiently aligns the leading edge of a paper as being fed into the image forming apparatus regardless of the thickness of the paper. The paper feeding apparatus includes: first and second feeding roller assemblies rotatably installed on a paper feeding path and at least one tension idle wheel installed in anyone of the first and second feeding roller assemblies. The tension idle wheel is resiliently and elastically deformable in the radial direction thereof when the first and second feeding roller assemblies come into close contact with each other. A leading-edge alignment member is installed downstream of the first and second feeding roller assemblies to align the leading edge of a paper as being fed with respect to the apparatus.

Description

The paper-advance unit that is used for imaging device

Technical field

The present invention relates to a kind of imaging device.Especially, the present invention is directed to a kind of paper-advance unit that is used for imaging device.

Background technology

As shown in Figure 1, traditional imaging device comprises paper supply unit 1, pickup unit 2 and feed unit 10, and wherein, the paper P in the paper supply unit 1 picks up and import feed unit 10 by pickup unit 2.When paper P passes developing element 3 and transfer printing unit 4 and is subjected to transmitting, paper P is imported feed unit 10 and imaging on surface thereof.When paper when the fixation unit 5, the image that is formed on the paper is carried out photographic fixing, by paper feeder unit 6 paper is discharged then.

Simultaneously, feed unit 10 has alignment device, and it is used to make from the leading edge of the paper of paper supply unit 1 aims in a straight line.Fig. 2 illustrates the feed unit 10 that is provided with the leading edge alignment device example that is used for paper.

As shown in Figure 2, feed unit 10 comprises a plurality of first feed rolls 13 that are installed on the driving shaft 12 and are spaced apart from each other.Motor 11 is connected to driving shaft 12.A plurality of second feed rolls 15 be installed on driving shaft 12 isolated idle running turning axles 14 on, with first feed rolls 13 and the leading edge that is used for that the leading edge of paper is aimed at aim at shutter 16 and face mutually.

The leading edge aligning shutter 16 that is used for paper is mounted to, make when aiming at paper front edge in a straight line, leading edge aligning shutter 16 is rotated with the direction shown in the arrow by the power driving of feeding paper, thereby opens the paper feed path under the effect of elastic device.

In the paper-advance unit of above-mentioned traditional imaging device, if the paper of feeding is thicker or the inertia of the paper that picked up is aimed at the elastic force of the flexible member of shutter 16 greater than the leading edge that is used for the resiliency supported paper, leading edge is aimed at shutter 16 may rotate and open the paper feed path before paper front edge is correctly aimed at.At this moment, when paper was imported developing element 3, paper was with misalignment.The misalignment that may occur misprint and image on paper is printed.

Summary of the invention

Therefore, the present invention addresses the above problem.One object of the present invention is to provide a kind of and has the paper-advance unit that is used for imaging device that improves structure, thereby need not to consider paper thickness and always can suitably aim at the leading edge of the paper that infeeds imaging device.

To achieve these goals, a kind of paper-advance unit that is used for imaging device comprises: be installed on the first and second feed rolls assemblies on the paper feed path rotatably; At least one is installed on the tensioning idle pulley of one of first and second feed rolls assemblies, and when the first and second feed rolls assemblies closely contacted each other, the tensioning idle pulley was radially gone up resiliently distortion at it; And the edge alignment member, it is installed on the downstream of the first and second feed rolls assemblies, aims at the leading edge to the paper that is subjected to feeding in the present invention.

According to a preferred embodiment of the invention, when the first and second feed rolls assemblies are spaced apart from each other, tensioning idle pulley sliding feed paper.In addition, paper-advance unit also can comprise: have the sensing unit of a plurality of sensors, be used to detect the leading edge of paper; And driver element, be used for when sensing unit sends the signal that paper front edge aimed at, the leading edge alignment member is driven opening the paper feed path with being rotated, and make the closely contact each other of the first and second feed rolls assemblies simultaneously.

The second feed rolls assembly can comprise: a plurality of rollers; With flexible turning axle, be used for that pair roller supports with being rotated and this turning axle can carry out elastic deformation by external force.

The tensioning idle pulley can be installed on the second feed rolls assembly dallying.

In one embodiment, the tensioning idle pulley comprises: the outer rim that closely contacts with the first feed rolls assembly; Be installed on the inner wheel hub on the turning axle of the second feed rolls assembly; With a plurality of spokes that are used to be connected outer rim and inner wheel hub, described spoke circles round diametrically at a predetermined angle.The number of spoke can be 2 to 5.Typically, spoke circles round in the same direction.

In addition, preferably, the tensioning idle pulley forms by resin is whole, and outer rim has smooth processing outside surface, thereby paper slides on outer rim.

Flexible turning axle can be formed by optical fiber, and is connected in sensor, with the signal transmission passage as sensor.

In another embodiment, the leading edge alignment member of paper comprise the blocking part that is positioned on the paper feed path with from the vertical control lever that overhangs of blocking part.Paper-advance unit also can comprise: hinge, be used for the leading edge alignment member is carried out pivotal support, and make that blocking part is selectively opened and close the paper feed path; And flexible member, be used for the leading edge alignment member is biased into off-position, with blocking-up paper feed path.

Flexible member can comprise: a plurality of spring abutments that supported by the turning axle of the second feed rolls assembly; And a plurality of springs between each operating rod of each bearing and leading edge alignment member.

In addition, driver element can comprise: cam member, be used for optionally pushing the end of operating rod, thereby the leading edge alignment member is rotated on the direction of opening the paper feed path; And motor, being used for the rotating cam element, this motor is activated according to the signal from sensing unit.

The power that the rebound resilience of flexible turning axle and flexibility apply less than compression disc spring, thus when the leading edge alignment member was rotated, turning axle resiliently was out of shape, the first and second feed rolls assemblies closely contact each other thus.

Be to provide to the present invention a kind of method of in imaging device paper being aimed on the other hand, comprise step: the paper feed path by this device becomes to contact with the removable lock of leading edge alignment member with paper feed, makes paper front edge aim at this lock; Paper front edge is detected with aiming at of this lock; And open door in response to the aligning that is detected, and the feeding paper passes this lock and by the paper feed path.

Describe in detail by the present invention below in conjunction with the open a plurality of embodiment of the present invention of accompanying drawing, these and other aspect of the present invention will become obvious.

Description of drawings

By the description that the reference accompanying drawing carries out some embodiments of the present invention, above-mentioned aspect of the present invention and feature will be more obvious, wherein:

Fig. 1 is the synoptic diagram that traditional imaging device structure is shown;

Fig. 2 illustrates the skeleton view of the employed paper-advance unit major part of imaging device of Fig. 1;

Fig. 3 is the side view according to the imaging device of the embodiment of the invention;

Fig. 4 is the front view of Fig. 3;

Fig. 5 is the skeleton view according to the feed rolls assembly of the paper-advance unit of the embodiment of the invention;

Fig. 6 is arranged on the skeleton view of the tensioning idle pulley in the feed rolls assembly of Fig. 5;

Fig. 7 A and 7B illustrate paper front edge for the vertical view of aiming at according to the paper-advance unit of the embodiment of the invention;

Fig. 8 is the side view that the feed rolls that the feed rolls assembly opens is shown, and it is engaged with each other as shown in Figure 3 and rotates; And

Fig. 9 is the front view that the device of Fig. 8 is shown.

Embodiment

Below, with reference to accompanying drawing the preferred embodiments of the present invention are described in detail.In the following description, when the description of well-known function and structure may make that theme of the present invention is not known, repeat no more.

Shown in Fig. 3 to 6, comprise leading edge alignment member 300, sensing unit 400 and the driver element 500 of the first feed rolls assembly 110, the second feed rolls assembly 120, a plurality of tensioning idle pulley 200, paper according to the paper-advance unit of the imaging device of the embodiment of the invention.

The first feed rolls assembly is rotatably mounted on the C of paper feed path.The first feed rolls assembly 110 comprises first turning axle 111 and a plurality of first feed rolls 112 that are installed on the turning axle 111 and are spaced apart from each other.The drive source that does not show among first turning axle 111 and the figure is connected.

The second feed rolls assembly 120 and the first feed rolls assembly 110 are separated.The second feed rolls assembly 120 is optionally with 110 contacts of the first feed rolls assembly and rotation, with feeding paper P shown in Figure 3.The second feed rolls assembly 120 comprises second turning axle 121 and is installed on second turning axle 121 and a plurality of feed rolls 122 that are spaced apart from each other.

Second turning axle 121 is made by the flexible material of elastically deformable under external force, thereby the first and second feed rolls assemblies 110 can optionally closely contacts and rotate together each other with 120, as described later.

Shown in Fig. 3 and 5, a plurality of tensioning idle pulleys 200 are installed on second feed rolls 120, and can dally.As shown in Figure 4, when first and second choosings were spaced apart from each other for roll assembly 110 and 120, tensioning idle pulley 200 contacted with roller 112, and with 110 rotations of the first feed rolls assembly, thereby sliding feed paper P.When the first and second feed rolls assemblies 110 and 120 contacted with each other, tensioning idle pulley 200 was in its elastic deformation upwards directly, thus feed rolls 110 with 120 closely contact the influence that can not be subjected to tensioning idle pulley 200.Be installed on the second feed rolls assembly 120 although tensioning idle pulley 200 is shown on the figure by way of example, also tensioning idle pulley 200 can be installed on the first feed rolls assembly 110.

Each above-mentioned tensioning idle pulley 200 includes outer rim 210, inner wheel hub or inner rim 220 and spoke 230, and these are formed by the material monolithic such as resin.Outer rim 210 contacts with corresponding feed rolls 112 in the first feed rolls assembly 110.The surface working of outer rim 210 is smooth, make it have lower friction factor.In this way, when outer rim 210 contacts with paper P, can produce slip, thereby realize the sliding feed of paper.

Inner rim 220 is installed on the turning axle 121 of the second feed rolls assembly 120 and by its support.Spoke 230 connects outer rim 210 and inner rim 220.As shown in Figure 6,4 spokes 230 circle round at equidirectional.Spoke 230 is shaped so that tensioning idle pulley 200 can easily be out of shape when external force is applied to tensioning idle pulley 200.Yet the quantity of spoke 230 is not restricted to 4, also is enough if two or more spokes are set.

As shown in Figure 3, the leading edge alignment member 300 of paper is mounted to the paper feed path downstream of optionally opening the first and second feed rolls assemblies 110 and 120.When opening when generation slip between paper P, the first feed rolls assembly 110 and tensioning idle pulley 200 and by tensioning idle pulley 200 and the first feed rolls assembly, 110 slow paper feeds, leading edge alignment member 300 blocking-up paper feed path C, thereby make top of form contact, thereby aim at paper equably with the leading edge alignment member of paper.

Shown in Fig. 3 and 7A, the leading edge alignment member 300 of paper comprises lock or blocking part 310 and operation part 320, and this operation part 320 is the form of the arm that vertically overhangs from blocking part 310.Hinge 330 pivots and supports leading edge alignment member 300, thereby paper feed path C can optionally be opened or close to blocking part 310.In addition, spring assembly or elastic part 340 resiliently are bonded into leading edge alignment member 300 and make blocking part 310 optionally block paper feed path C.Shown in Fig. 7 A, 7B and 8, alignment member has a plurality of arms, and described arm engages with the spring of elastic part 340, so that alignment member is biased in off-position.The length of the motion arm shown in Fig. 7 A is greater than the arm that engages with spring.

Elastic part 340 is spring assemblies, it comprises bearing 341 shown in a plurality of Fig. 3 and 8 and a plurality of collapse coil or spring 342, bearing is supported by the rotating hinge 121 of the second feed rolls assembly 120, and collapse coil or spring are between each control arm 320 of each bearing 341 and leading edge alignment member 300.

Sensing unit 400 shown in Fig. 3 comprises a plurality of sensors, and whether its parallel blocking part 310 dead aheads that are installed on leading edge alignment member 300 are suitably aimed at the leading edge that detects paper P.In the present embodiment, if the second flexible turning axle 121 is made by optical fiber, turning axle 121 also can be used as signal transmssion line so, and to need not be that sensor is equipped with the additional signals transmission channel.Sensor 400 can be optical sensor, infrared sensor or sonac.The front end of 400 couples of paper P of sensor detects, and with the orientation of determining that paper is aimed at respect to device, thereby guarantees that the image of printing suitably aims on paper.

If sensing unit 400 sends the signal that top of form is suitably aimed at, driver element 500 drives the leading edge alignment member 300 of paper rotatably, to open paper feed path C, and the first and second feed rolls assemblies 110 and 120 are moved to each other closely contact simultaneously, thereby the paper that leading edge is suitably aimed at supplies to device.

As shown in Figure 3, driver element 500 comprises cam member 510, be used for optionally pushing operating rod 320 ends of leading edge alignment member 300, thereby leading edge alignment member 300 is rotated on the direction of opening paper feed path C.Motor 520 is connected to cam member, with rotating cam element 510.Motor 520 is activated according to the signal from the sensing unit 400 that detects the paper of aiming at.

In addition, the elastic force of the second flexible turning axle 121 is chosen to be elastic force less than the force of compression of disc spring 342, thereby when leading edge alignment member 300 during around hinge 330 rotations, turning axle 121 elastic deformations, as shown in Figure 9, thus the first and second feed rolls assemblies 110 closely contact each other with 120.

Referring now to Fig. 3,4,7A, 7B, 8 and 9, to aiming at according to the paper front edge of the paper-advance unit of the above-mentioned configuration of the embodiment of the invention and paper feed is described.

Fig. 3 and 4 is picked up and is imported the side view and the front view of the state between the first and second feed rolls assemblies 110 and 120 for the front end that paper P is shown respectively by device.The first feed rolls assembly 110 and the second feed rolls assembly 120 are spaced apart from each other, and are installed on the tensioning idle pulley 200 contacts first feed rolls assembly 110 on the second feed rolls assembly 120.

Import the centripetal force feeding that the paper P between the tensioning idle pulley 200 and the first feed rolls assembly 110 is applied by the first feed rolls assembly 110.At this moment, if with paper 110 according to the feeding of misalignment position, shown in Fig. 7 A, a side P1 of the leading edge of paper P at first contacts with the blocking part 310 of the leading edge alignment member 300 of paper.On this position, produce to slide between the first feed rolls assembly 112, paper P and the tensioning idle pulley 200, thereby, because a side P1 of paper front edge is stopped, so an other side P2 of paper P leading edge rotates and contacts with blocking part 310.Thereby paper front edge is evenly aimed at device and blocking part 310.Fig. 7 B illustrates the suitable aligning of paper front edge.

For example, all the sensors of the sensing unit 400 on being arranged on paper width direction just detects finishing that paper front edge shown in Fig. 7 B aims at all when " ON " is converted to " OFF ".Then, through behind the preset time, by the controller (not shown) driver element 500 is driven, thereby open paper feed path C, simultaneously the first and second feed rolls assemblies 110 with it is rotated in 120 closely contacts each other, with use leading edge feeding paper P.

With reference to Fig. 8 and 9, when drive motor 520, be installed on motor 520 the axle on cam member be rotated.As a result, as shown in Figure 8, the leading edge alignment member 300 of paper turns clockwise around hinge 330.Therefore, the end of blocking part 310 is removed from paper feed path C, thereby opens paper feed path C.Simultaneously, when operation part 320 is pushed the disc spring 342 of elastic parts 340, second turning axle, 121 elastic deformations, thus the second feed rolls assembly 120 closely contacts the first feed rolls assemblies 110.At this moment, be installed on tensioning idle pulley 200 radial deformations on the second feed rolls assembly 120, closely do not contact each other with 122 thereby can not hinder first and second feed rolls 112.

Then along open paper feed path C feeding paper P, and when the tail end of paper passed through a plurality of sensor, drive motor 520 on opposite direction, thereby make the leading edge alignment member 300 and the second feed rolls assembly 120 turn back to its initial position.

As mentioned above, according to the present invention, the aligning of leading edge that is subjected to the paper of feeding is not to be undertaken by the power that is used for the feeding paper, but when on paper slip having taken place when having blocked the paper feed path, opens the paper feed path after paper front edge is aimed at and carries out.Therefore, need not to consider paper sheet thickness, can both effectively aim at paper front edge.In addition, according to the present invention, even owing to when paper is thicker, also can aim at reposefully paper front edge, thereby can reduce the misprint that the sinuous feeding (serpentine feeding) owing to paper takes place.

Although for the principle of the invention being carried out exemplary illustration and exemplary embodiments of the present invention is illustrated and describes, the present invention is not limited to these specific embodiments.Should be appreciated that under the prerequisite that does not depart from the spirit and scope of the invention that is indicated in the appended claims those skilled in the art can carry out various modifications and variations.Therefore, will be understood that these modifications, variation and equivalent thereof all are contained in the scope of the present invention.

Claims (14)

1, a kind of paper-advance unit that is used for imaging device comprises:
Be installed on the first and second feed rolls assemblies on the paper feed path rotatably, the first feed rolls assembly comprises first roller, and the second feed rolls assembly comprises second roller;
At least one is installed on the tensioning idle pulley on the second feed rolls assembly, the second feed rolls assembly can move from the primary importance and the second place, and at the primary importance place, second roller and first roller are spaced apart, and the tensioning idle pulley contacts with first roller, passes through the paper feed path with the sliding feed paper; At second place place, second roller contacts with first roller, and by the paper feed path, the tensioning idle pulley is radially gone up resiliently distortion at it with the feeding paper; And
The leading edge alignment member, it is positioned the downstream of the first and second feed rolls assemblies, by paper feed path feeding paper the time, paper front edge being aimed at,
Wherein, the second feed rolls assembly also comprises:
Flexible turning axle is used for described second roller is supported with being rotated, and wherein turning axle can carry out elastic deformation by external force,
Described at least one the tensioning idle pulley and second roller are installed on the described flexible turning axle rotatably.
2, paper-advance unit as claimed in claim 1 also comprises:
Sensing unit with a plurality of sensors is used to detect the aligning of paper front edge with respect to paper-advance unit; With
Driver element is used for when sensing unit detects paper front edge and is in the predetermined alignment state with respect to this device, the leading edge alignment member is driven opening the paper feed path with being rotated, and make the closely contact each other of the first and second feed rolls assemblies simultaneously.
3, paper-advance unit as claimed in claim 1, wherein the tensioning idle pulley comprises:
The outer rim that closely contacts with the first feed rolls assembly;
Be installed on the inner wheel hub on the turning axle of the second feed rolls assembly; With
A plurality of spokes that are used to connect outer rim and inner wheel hub, described spoke circles round diametrically at a predetermined angle.
4, paper-advance unit as claimed in claim 3, wherein the tensioning idle pulley comprises 2 to 5 spokes that circle round in the same direction.
5, paper-advance unit as claimed in claim 4, wherein the tensioning idle pulley forms by resin is whole.
6, paper-advance unit as claimed in claim 5, wherein outer rim has smooth processing outside surface, makes to produce between the outside surface of paper and this wheel rim to slide.
7, paper-advance unit as claimed in claim 1, wherein flexible turning axle is formed by optical fiber, and is connected in sensor, with the signal transmission passage as sensor.
8, paper-advance unit as claimed in claim 1, wherein the leading edge alignment member comprise the blocking part that is positioned on the paper feed path with from the vertical a plurality of control lever that overhang of blocking part, and wherein paper-advance unit also comprises:
Hinge is used for the leading edge alignment member is carried out pivotal support, makes that blocking part is selectively opened and closes the paper feed path; With
Flexible member is used for the leading edge alignment member is biased into off-position, with blocking-up paper feed path.
9, paper-advance unit as claimed in claim 8, wherein flexible member comprises:
A plurality of spring abutments that support by the turning axle of the second feed rolls assembly; With
A plurality of springs between each control lever of each bearing and leading edge alignment member.
10, paper-advance unit as claimed in claim 9, wherein the leading edge alignment member comprises control lever, and wherein driver element comprises:
Cam member is used for the optionally end of extrusion operation bar, makes the leading edge alignment member rotate on the direction of opening the paper feed path; With
Motor is used for the rotating cam element, and this motor is activated according to the signal from sensing unit.
11, as the paper-advance unit of claim 10, wherein the rebound resilience of flexible turning axle and the power that flexibility applies less than described spring make that turning axle resiliently is out of shape when the leading edge alignment member is rotated, the first and second feed rolls assemblies closely contact each other thus.
12, a kind of imaging device comprises:
Be installed on the first and second feed rolls assemblies on the paper feed path of device rotatably, the first feed rolls assembly comprises first roller, and the second feed rolls assembly comprises second roller;
At least one is installed on the tensioning idle pulley on the second feed rolls assembly, the second feed rolls assembly can move from the primary importance and the second place, and at the primary importance place, second roller and first roller are spaced apart, and the tensioning idle pulley contacts with first roller, passes through the paper feed path with the sliding feed paper; At second place place, second roller contacts with first roller with the feeding paper and passes through the paper feed path, and the tensioning idle pulley radially can resiliently be out of shape at it;
The leading edge alignment member of paper, its downstream that is positioned the first and second feed rolls assemblies is with selectively opened and close the paper feed path, when the leading edge alignment member was in the off-position in blocking-up paper feed path, the leading edge alignment member made by the leading edge of the paper of tensioning idle pulley sliding feed and aims at;
Sensing unit with a plurality of sensors is used to detect the aligning of paper front edge with respect to device; And
Driver element, be used for when sensing unit detects the predetermined alignment of paper, the leading edge alignment member is driven opening the paper feed path with being rotated, and make the closely contact each other of the first and second feed rolls assemblies simultaneously, with the paper feed path of feeding paper by this device
Wherein, described at least one the tensioning idle pulley and second roller are installed on the flexible turning axle rotatably.
13, as the imaging device of claim 12, the diameter of wherein said at least one tensioning idle pulley is greater than the diameter of second roller.
14, as the imaging device of claim 12, wherein the leading edge alignment member comprises movably the lock element so that the paper feed path is closed and blocked,
And wherein the first and second feed rolls assemblies become this lock element of contact with paper feed, so that paper is aimed at the edge of lock element.
CNB2006101317230A 2005-09-29 2006-09-29 Paper feeding apparatus for image forming apparatus CN100517097C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020050091441A KR100701323B1 (en) 2005-09-29 2005-09-29 Paper feeding apparatus for image forming apparatus
KR91441/05 2005-09-29

Publications (2)

Publication Number Publication Date
CN1940741A CN1940741A (en) 2007-04-04
CN100517097C true CN100517097C (en) 2009-07-22

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US (1) US20070069456A1 (en)
KR (1) KR100701323B1 (en)
CN (1) CN100517097C (en)

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