CN101638184A

CN101638184A - Feed device, and image reader and image forming apparatus incorporating the same

Info

Publication number: CN101638184A
Application number: CN200910159666A
Authority: CN
Inventors: 久住正
Original assignee: Ricoh Co Ltd
Current assignee: Ricoh Co Ltd
Priority date: 2008-07-30
Filing date: 2009-07-29
Publication date: 2010-02-03
Anticipated expiration: 2029-07-29
Also published as: CN101638184B; EP2149523A3; EP2149523A2; ATE539992T1; US20100025916A1; JP5477549B2; JP2010052943A; EP2149523B1

Abstract

The present invention relates to a feed device, an image reading device and an image forming device. The feed device includes a body, a support shaft (60) arranged on the body, and a pickup mechanism(80A) for contacting and picking up. The pickup mechanism comprises a swingably arm (61) and a pickup unit (10A) comprising: an annular outer surface and and an annular elastic belt (65) contacted with a recording medium; a first pulley (62) rotatably attached to the fulcrum shaft (61a); a supporter (64) rotating with the fulcrum shaft (61a) and sliding along the periphery of the first pulley; a second pulley (63) supported by the supporter (64); and a belt (65) bridged on the first pulley (62) and the second pulley (63). The inner periphery of the belt (65) is shorter than the circumference formed by the first pulley (62), the supporter (64) and the second pulley (63).

Description

Paper feed is provided with the image read-out of this paper feed, image processing system

Technical field

The present invention relates to be used for the paper feed of image processing systems such as chopping machine, facsimile apparatus, PPC, printer, be provided with the image read-out of this paper feed, image processing system relates in particular to the paper feed of the corresponding scope of the paper that can improve paper conveyer.

Background technology

In recent years, the image processing system of duplicator etc. is in the market expansion, and multi-form user demand is also increasing.Also without exception for paper thickness, can use the market demand than the thick more paper of thickening of in the past paper in continuous increase.

The employed in the past paper of delivery ratio is thick also wants thick paper if desire, and when when paper are rubbed on intrafascicular many ground of paper with the hands, is easy to generate slippage, produces bad existing picture of conveying that paper feeding time is bad or do not carry etc.

Figure 10 is the block diagram that comprises the paper-rubbing mechanism 80R of pickup roller 70.When printing on ground paper, pickup roller 70 need apply sizable pressure to paper, so that do not carry slippingly suitably.As a result, the driving of pickup roller 70 load increases, and must increase the size of drive motor according to occasion, and, need to improve the intensity of portion's material of pickup roller of supporting paper-rubbing mechanism or framework etc., so, must make paper-rubbing mechanism 80R device proper become big.

Also have, press owing to improved the signature of pickup roller 70, the abrasion of pickup roller 70 accelerate, lifetime.

In patent documentation 1 disclosed paper feed, by the band that sets up by fulcrum roller and mobile rollers, make it the function that has reception, hold, carry, become from an intrafascicular stranding of paper and a part of separating function, fulcrum roller fulcrum with the fixed pivot position is that fulcrum can turn round, therefore, the variation that can not corresponding paper angle and the change of paper supply height.Also have, as shown in the document, effective when being certain carrying mechanism at band and certain, the suitable all the time paper supply height that can rub paper with the hands of contact surface of paper bundle, but when adopting apsacline paper rising mechanism, when the angle of paper changed when at full load and a small amount of mounting, said mechanism can only be the center swing with the fulcrum roller, therefore, the contact surface of paper and band conveyor surface changes, and can not obtain stable carrying capacity.That is, though in the certain all the time carrying mechanism of the contact angle of paper and zone face and paper supply height effectively, in other carrying mechanisms, can not change use, do not have wide usage.

Disclosed paper sheet conveyor in the patent documentation 2, by the belt wheel on the donor rollers axis of revolution and pick up roller (suitable) with pickup roller the axle on belt wheel, tape wrapping is on it, pick up roller with the driven revolution of donor rollers, outside face and the donor rollers of band and the outer peripheral face of picking up roller make band also have the supply function for roughly simultaneously same.As shown in the figure, if the paper supply height is positioned at the low position, position that becomes level than the paper side of band, then band and paper can not keep area of contact just in time, can only bring into play the effect the same with common pickup roller.That is, before the paper side of band was horizontal, only the paper of paper bundle was set at hoisting position, just can keep the area of contact of band, when the paper supply height changes up and down, can not obtain enough area of contact.In patent document 1, do not mention the area of contact of band.

In patent documentation 3 in the disclosed paper feed, substitute paper feed roller (being equivalent to pickup roller) in the past, conveying roller and paper feed roller are replaced with band, be provided with the oriented plate between the transfer passage of paper feed roller and conveying roller, the association between utilizing and being with is moving to be prevented from heavily to send.As function from the intrafascicular stranding of paper, roughly the same with the occasion of the area of contact of paper bundle paper and paper feed roller, the same with patent documentation 2, do not mention area of contact.

In patent documentation 4 in disclosed image read-out and the image processing system, the main purpose of tape cell is that guiding separates the top of form that transports from paper feed, it is right to make the front end of paper be easy to insert the conveying roller in downstream, can not increase the area of contact of band, can not improve carrying capacity.

[patent documentation 1] spy opens flat 06-316343 communique

[patent documentation 2] spy opens flat 08-231072 communique

[patent documentation 3] spy opens flat 05-155446 communique

[patent documentation 4] spy opens the 2007-308303 communique

Summary of the invention

The present invention puts forward for solving above-mentioned existing in prior technology problem, the objective of the invention is to, eliminate above-mentioned unusual, when having rubbed paper with the hands, do not strengthen the pushing of pickup roller in the past, by using the area of contact between band increase and the paper,, unsve so far ground paper also can have been rubbed with the hands to strengthen carrying capacity.

Therefore, the present invention is in view of above-mentioned requirement and hope, and the paper that the ground paper that delivery ratio was used in the past is thicker becomes possibility.

In addition, has rubbed pushing owing to can use with unmodified in the past, therefore, can realize with long lifetime the time, even use is with, also can provide and unmodified compact device in the past.

In order to solve above-mentioned problem, the present invention proposes following technical scheme.

(1) a kind of paper feed is supplied with the paper as recording medium, comprising:

Body, these body loading and unloading relatively of described paper feed;

Fulcrum is arranged on the described body; And

Paper-rubbing mechanism, contact is also rubbed paper with the hands;

Described paper-rubbing mechanism comprises:

But swing arm is provided with fulcrum shaft, is installed in pivotally on the fulcrum that the body of described paper feed is provided with; And

Rub the paper unit with the hands, but be installed in pivotally on the fulcrum shaft of described swing arm;

Described stranding paper unit comprises:

The cyclic spring band, its outer annular surface contacts with recording medium;

First belt wheel is contained on the fulcrum shaft pivotally;

Supporter, around the fulcrum shaft revolution, and, can be along the outer cycle slip of first belt wheel;

Second belt wheel is supported by supporter; And

Band is erected on first belt wheel and second belt wheel;

The interior week of described band is than all length by above-mentioned first belt wheel, supporter and second belt wheel.

(2) in above-mentioned (1) described paper feed, it is characterized in that:

The supporter of above-mentioned stranding paper unit comprises pawl, and its two side ends from supporter is extended;

Paper-rubbing mechanism further comprises block, and it is located at the two side ends of first belt wheel and second belt wheel, so that stop described pawl;

When described pawl contacted with described block, first belt wheel and second belt wheel were configured to roughly parallel to each other.

(3) in above-mentioned (1) or (2) described paper feed, it is characterized in that:

At least one comprises rib in described first belt wheel and second belt wheel, is arranged on the two ends of belt wheel, prevents that elastic webbing is from predefined offset;

The external diameter of the both sides of the belt wheel that contacts with elastic webbing is littler than the external diameter of belt wheel center;

Supporter comprises sliding surface, and its width equates with the both sides width of belt wheel.

(4) in any described paper feed of above-mentioned (1)-(3), it is characterized in that:

Above-mentioned first belt wheel comprises the driving input gear;

Along the throughput direction of recording medium, second belt wheel is arranged on the upstream side of first belt wheel.

(5) in any described paper feed of above-mentioned (1)-(4), it is characterized in that:

Further comprise a plurality of sheet feed sections;

At least one comprises described paper-rubbing mechanism in above-mentioned a plurality of sheet feed section.

(6) a kind of image read-out is characterized in that:

This image read-out is provided with any described paper feed in above-mentioned (1)-(5).

(7) a kind of image processing system is characterized in that:

This image processing system is provided with any described paper feed in above-mentioned (1)-(5).

(8) a kind of image processing system is characterized in that:

This image processing system is provided with the image read-out described in above-mentioned (6).

(9) in above-mentioned (8) described image processing system, it is characterized in that:

Described image processing system is a kind of multi-function printer, and it has any one function in duplicator, facsimile apparatus, chopping machine, the ink-jet recording apparatus.

(10) in above-mentioned (8) described image processing system, it is characterized in that:

Described image processing system is a kind of multi-function peripheral, and it has at least two kinds of functions in duplicator, facsimile apparatus, chopping machine, the ink-jet recording apparatus at least.

The following describes effect of the present invention

According to the present invention, by using endless belt, can strengthen the contact surface with recording medium, increase carrying capacity.Therefore, can carry out paper supply to the thick recording medium that can not carry so far.

Description of drawings

Fig. 1 is the substantial middle section drawing of the color printer that relates to of one embodiment of the invention.

Fig. 2 is the block diagram (a) and the summary sectional view (b) of sheet feed section of the present invention.

Fig. 3 is a block diagram of rubbing the paper unit with the hands.

Fig. 4 is the block diagram of big belt wheel.

Fig. 5 is the block diagram of support.

Action specification figure when Fig. 6 is paper-rubbing mechanism and paper bundle mounting.

Fig. 7 is the summary sectional view of paper feed.

The section drawing of the paper feed when Fig. 8 is paper Shu Shaoliang.

Fig. 9 is the section drawing of the paper feed when not having base plate rising mechanism.

Figure 10 is the block diagram of the paper-rubbing mechanism of pickup roller.

The specific embodiment

Other purpose and feature of the present invention, the explanation according to the example hereinafter of reference accompanying drawing will become clear and definite.

Below, describe preferable example of the present invention in detail with reference to description of drawings, in following example, though to inscape, kind, combination, shape, configuration waits and has done various qualifications relatively,, these only exemplify, and the present invention is not limited thereto.

[embodiment 1]

The image processing system of present embodiment is the suitable example that adopts the color printer of so-called tandem moor.Fig. 1 is the central section drawing of the summary of this color printer 100 of expression.

At first, illustrate that according to Fig. 1 the inside of this color printer 100 constitutes.Inside at these color printer 100 devices, form means as the image of each color image that is used to form yellow (Y), cyan (C), magenta (M), black (K), four drum type photosensitive material 2Y as sub-image mounting body, 2M, 2C, 2K when not needing special color especially (following only indicate separately symbol 2) left and right directions equal intervals spacing parallel arranging in the drawings are provided with.And, during image processing system 100 actions,, turn round along the direction of arrow according to drive source not shown in the figures.

Around photosensitive material 2, set display etc., for parts, the device of image processing system necessity of electrofax mode, constituting as image forming part everywhere, when the explanation correspondence is made the toner look of image pattern picture, identical with above-mentioned photosensitive material, can add a character of paying expression its color Y (yellow), a C (cyan), M (magenta), K (black) as the number back of device at each work of expression easily.But, identical with photosensitive material 2 in bright in general, save these sometimes and add and pay a literal.

Four image forming parts 1 all are identical structures, and each image forming part 1 is provided with charging unit 4, display 5, clean-up device 3 around separately photosensitive material 2.Also have, photosensitive material 1 also can use endless belt-shaped parts.

As shown in fig. 1, the below of photosensitive material 2 is provided with exposure device 8, and this exposure device is used for and will scanning by the surface of each charged photosensitive material 2 of charging facility homogeneous with the pairing laser of view data of all kinds, forms electrostatic latent image.Between each charging unit 4 and each display 5, along the axis of revolution direction of photosensitive material 2, guarantee slender space, make by the laser of this exposure device 8 irradiations and inject towards photosensitive material.

The exposure device 8 of illustrated example is the exposure device that adopts the laser scanning methods of lasing light emitter, polygonal mirror etc., and never graphic four semiconductor lasers send

light beam

8Y, 8C, 8M, 8K according to the data modulation that is used to form image.Exposure device 8 is by metal or resinous framework, takes in optics, parts are used in control, and superincumbent exit wound of bullet is provided with the dust proof member of light transmission.Embodiment is made of 1 framework, but also a plurality of exposure devices individually can be arranged at each image forming part.Except the exposure device that adopts above-mentioned laser, also can adopt the exposure device of well-known led array and imaging means combination.

Each colour toners of yellow (Y), cyan (C), magenta (M), black (K), be consumed at processing each display 5 of all kinds, detect by toner detection means not shown in the figures, from being located at the

toner print cartridge

40Y, 40C, 40M, the 40K that are used to take in each colour toners on image processing system 100 tops, by supply mean not shown in the figures, be supplied to each developing apparatus 5.Be provided with mistake and install and to prevent means, for example make the shape design etc. in pairs of incorporating section TS and toner print cartridge 40, so as to prevent toner print cartridge of all kinds 40 wrongly installed, to the display supply toner of handling its allochromatic colour.

On the top of photosensitive material 2, has intermediate transfer unit 6.Set up as the intermediate transfer belt 6a as the mounting body by a plurality of

roller

6b, 6c, 6d, 6e supporting, roller 6b revolution makes intermediate transfer belt 6a move along the direction of arrow.This intermediate transfer belt 6a is set up the part contact behind the developing procedure that is configured so that each photosensitive material in the form of a ring.Perimembranous is provided with the primary transfer roller 7 with each photosensitive material subtend in band.

At the peripheral part of intermediate transfer belt 6a, be provided with clean-up device 6h with roller 6e subtend position.These clean-up device 6h wipes foreign matters such as toner of not wanting residual on the band 6a surface or paper powder.The roller 6e relative with these clean-up device 6h is provided with the mechanism with 6a tension force.Move in order to guarantee suitable belt tension all the time, but the clean-up device of subtend setting also interlock move.

In the periphery of intermediate transfer belt 6a, near the anvil roll 6b, be provided with secondary transfer roller 14a.Between intermediate transfer belt 6a and secondary transfer roller 14a, make paper S pass through on one side,, make the toner image of intermediate transfer belt 6a institute mounting be transferred to paper S statically Yi Bian apply bias voltage.

Below exposure device 8, be provided with several sections for example two sections sheet feed cassette 9A, 9B that can extract out.The paper S that takes in these sheet feed cassettes is optionally sent by the revolution of pairing stranding

paper unit

10A, 10B, by separation means 11A, 11B and conveying

roller

12A, 12B is delivered to paper supply feed path P 1.Be described in detail later and rub the paper unit with the hands.

On paper supply feed path P 1,, be provided with a pair of registration roller 13 in order to obtain paper feed timing to the output paper S of secondary transfer printing portion.Paper S carries towards the secondary transfer printing portion that is made of intermediate transfer belt 6a and secondary transfer roller 14a from registration roller to 13.

The manual paper feeder 25 that is located at the figure right side makes it to turn round the support F of the part that can be accommodated in image forming device body 100 obsolete the time.The uppermost paper S that manual paper feeder 25 is taken in is separated by separation means 27 by paper feed roller 26 paper supplies, once only carries one reliably, delivers to aforementioned a pair of registration roller 13 to 22,24 through feed path P 1 by conveying roller.

Above secondary transfer printing portion, be provided with fixing device 15 with heater means.In this example, be that roller 15a, the 15b by built-in heater constitutes, still, also can adopt banding pattern, type of heating also can adopt IH device etc.

Switching guide G1 can turn round, and under shown position, the paper after the guiding photographic fixing finishes enters row's paper path P 3, and by a pair of exit roller 16, row's paper to row's paper on image processing system 100 tops is piled up the T of portion, piles up.

The chopping machine 100 of Fig. 1 is provided with the counter-rotating that is used for paper and the transport path and the roller of paper supply again, can automatically form image on the two sides of paper.Specifically, be turning path P5 to be set on the top of row's paper portion.The paper S that sends here from sheet feed section carries out the single face imaging via secondary transfer printing portion, fixing device.

The 1st switches the revolution of guide G1 clockwise direction, forms local feed path P 4 through the left surface by paper guide 30, is sent to conveying roller 18a, the 18b that can reverse.By conveying roller 18, paper S is directed to the turning path P5 that is formed by interior tray 31.

The rear end of paper exceeds after the conveying downstream front end of paper guide 30, and the revolution of conveying roller 18a anticlockwise direction imports paper supply path P 6 again with paper S.Paper S through the conveying roller of configuration in the paper supply path P 6 again to 20,14d and 21,14c, contact by the roller 22 and the roller 23 that can reverse, clamping paper S through feed path P 1, carries out paper supply again to registration roller 13.

As mentioned above, reversible driven roller 22 joins with

roller

23,24, during this roller 22 cws revolution, carry with the paper that roller 24 coordinated are sent here manual paper feeder 25, during turning anticlockwise, the S of paper supply again that P6 is come in the action of roller 23 coordinated carries to the direction of registration roller 13.

Device shown in Fig. 1 is provided with other paper feed 50 in the bottom.2

sheet feed cassette

9C, 9D being arranged in this example, but also can adopt the form that increases greater number, also can be to take in several sheet feed cassettes and carry out built-in form having increased paper.

In such structure, the action when illustrating about being printed on one side of the single face that image is formed at paper S.

At first, by the action of exposure device 8, penetrate from semiconductor laser with yellow with the cooresponding laser 8Y of view data, be radiated at surface by the charged photosensitive material 2Y of charging unit 4Y homogeneous, form electrostatic latent image.

This electrostatic latent image is accepted the video picture of display 5Y and is handled, and is developed by Yellow toner, but becomes video, accepts the transfer printing effect of primary transfer roller 7Y on the intermediate transfer belt 6a surface of moving simultaneously with photosensitive material 2Y, by primary transfer.This sub-image formation, development, primary transfer action are also undertaken by same order of time at photosensitive material 2C, 2M, 2K.

Its result, the toner image of all kinds of yellow Y, cyan C, magenta M and black K is superimposed successively as four colour toners images, is positioned in the surface of intermediate transfer belt 6a, moves to the direction of arrow simultaneously with intermediate transfer belt 6a.On the other hand, by clean-up device 3, the surperficial remaining toner and the foreign matter of photosensitive material 2 are removed.

The four colour toners images that form on intermediate transfer belt 6a, by the transfer printing effect of secondary transfer roller 14a, transfer printing is on the paper S with intermediate transfer belt 6a synchronous transport.And in intermediate transfer belt 6a side, 6h cleans its surface by the band clean-up device, is equipped with imaging, the transfer printing process done after this.

Paper S after the image transfer printing accepts the photographic fixing effect by fixing

device

15, and 16 rows pile up the T of portion to row's paper by exit roller, arrange paper downwards by image surface.

In this structure, the action when forming the two sides record of image on the two sides of paper S is described.By above-mentioned action, at first on the single face of paper S by intermediate transfer belt 6a transferred image, will be by the paper behind the fixing device 15, switch guide G1 guiding roller to 18 by first.Send into the feed path P 5 that interior tray 31 constitutes by

roller

18a and 18b, reversible driven roller 18a carries out turning anticlockwise when just exceeding the front end of paper guide 30 in the rear end of paper S.So far for the paper rear end become front end,, carry 22,23 14d, 20 and 14c, 21 by roller to roller.As above-mentioned, arrive registration roller then to 13.When being got 13 by registration roller, have the paper S of image to carry to the secondary transfer printing portion that is provided with secondary transfer roller 14a once again transfer printing on the single face, the toner image on the intermediate transfer belt 6a is transferred to the another side of paper S.

Being formed on the image on the 2nd of paper, is that this paper S is delivered to when setting the position, is formed successively by the beginning imaging process.The color toner image of the imaging process of this occasion during also with aforesaid being printed on one side forms identical, makes this color toner image be positioned on the intermediate transfer belt 6a.But, because paper front and back counter-rotating on transport path during imaging relatively at first, is controlled the making of penetrating from exposure device of view data, so that carry out reverse work picture at the paper throughput direction.Like this, carry out photographic fixing by fixing device 15 once again at the paper S of two sides transfer printing chromatic colour toner picture and handle, pile up on the T of portion to arranging paper by exit roller 16 row's paper.

In order to improve the efficient that picture is made on the two sides, can carry plurality of sheets of paper simultaneously on the transport path.Also have, control is carried out in the surface of paper, the formation of image that the inside forms constantly by control mechanism (not having diagram).Relate to that these are printed on one side, the two-face printing action, when being carried out the black and white printing by black, there is obsolete photosensitive material in the example explanation with carrying out colored printing.Obsolete photosensitive material 2Y, 2C, 2M or

display

5Y, 5C, 5M do not make it work, also possess in order to guarantee keeping discontiguous mechanism between photosensitive material that these are not used and the intermediate transfer belt 6a.In this example, make the inner frame 6f of anvil roll 6d and

primary transfer roller

7Y, 7C and 7M, supporting is can be center steering with axle 6g, by turning round towards leaving photosensitive material direction (clockwise direction among Fig. 1), making has only photosensitive material 2K to contact with intermediate transfer belt 6a, by carrying out imaging process, form black and white image by black toner.Favourable on this aspect of life-saving.

Also have, when in transport path paperboard taking place, making support F is center of gyration with the axis of revolution Fa of below, with the top as the structure that can open (not illustrating).Before the opening, by operating locking bar not shown in the figures, make it open, all then transport paths can be opened, therefore, and can be so that the processing of the paper after the paperboard occurs.

Feed path P 2 and P6 are formed on the secondary transfer printing unit 14 of both sides, center with roller 23 is a center of gyration, and behind open stent F, secondary transfer roller 14a breaks away from intermediate transfer belt 6a, and give the secondary transfer printing unit 14 revolution inertia, so that

roller

14c and 14d leave roller 21 and 20.This secondary transfer printing unit 14 is provided with power supply 14b in inside, outside is to have the unit that paper is carried function.

Below by Fig. 2 paper-rubbing mechanism of the present invention is described.

Fig. 2 is block diagram (a) and the summary sectional view (b) of sheet feed section 80A.From the sheet feed cassette of mounting paper the paper feed that paper passes out to image forming part is provided with the separation means 11A that rubs paper unit 10A with the hands and be positioned at its conveying downstream, described paper-rubbing mechanism 10A contacts with the uppermost paper of paper bundle, take out paper, described separation means 11A is when carrying at least 2 paper, and many ground are sent to image forming part with the paper separation.

Rubbing paper unit 10A with the hands is made of big belt wheel 62, supporter 64, cyclic spring band 65.The outlet roller 66 of fulcrum 60 supporting separation means 11A, make its revolution, rub with the hands paper arm 61 with fulcrum 60 as center of gyration, fulcrum shaft 61a is arranged on the described stranding paper arm 61 regularly, described big belt wheel 62 is installed on this fulcrum shaft 61a pivotally, described supporter 64 supports small pulley 63 slidably at the outer peripheral face of big belt wheel 62, and described elastic webbing 65 is erected at (with reference to Fig. 2 and Fig. 3) on big belt wheel 62 and the small pulley 63 by the elastic force of self.Fig. 3 (a) rubs paper unit assembly drawing with the hands, and Fig. 3 (b) rubs paper unit exploded drawings with the hands.

The related of big belt wheel 62 and supporter 64 is described here.

Fig. 4 is the block diagram of big belt wheel 62.There is rib both sides, and there is the driving input gear 62d of portion that becomes one in the outside of the rib of Fig. 4 left end, and there are sliding

part

62a, 62b in the inboard front and back of two inclines, and than the high some central spud 62c of sliding part, the distance between two inclines is Lo.

The following describes supporter 64, Fig. 5 (a) is the block diagram of the supporter 64 seen from the contact surface side of big belt wheel 62.At the front and back of supporter 64

configuration pawl

64a, 64b, roughly middle supporter sliding part 64c, the 64d of being provided with at supporter 64, corresponding with sliding part 62a, the 62b of big belt wheel 62, shown in Fig. 5 (a), if the distance between the sliding part is made as L1, Lo-L1＞0 then, the sliding part 62a separately that constitutes big belt wheel 62 and supporter 64 contacts with 64d with 64c, 62b, simultaneously, rib by big belt wheel 62 prevents that supporter 64 from moving towards thrust direction (axially), and rib prevents that also elastic webbing 65 is shifted towards thrust direction.

Also have, small pulley 63 is as Fig. 5 (b) sees, enters supporter 64 formed recesses, and the recess of supporter 64 has the proper width consistent with the two ends of small pulley 63, accepts small pulley 63 at this recess.

In structure as described above, elastic webbing 65 is shown in Fig. 3 (a), and clamping supporter 64 between big belt wheel 62 and small pulley 63 is being set up, being set in interior week than suitably short by the girth that supporter 64 constitutes by big belt wheel 62 and small pulley 63 of elastic webbing.Under the assembled state of Fig. 3 (a),, become and rub paper unit 10A with the hands because the convergent force of elastic webbing 65 forms one.

Utilize Fig. 6 that warming-up exercise before the paper supply is described when the preceding sheet feed cassette of paper supply action is arranged in the body below.

With the paper feed of the epimere of multistage paper feed illustrated in fig. 1 (by sheet feed cassette 9A, rub paper unit 10A, separation means 11A with the hands constitute) is that representative describes.

If mounting paper S in sheet feed cassette 9A is arranged in the image forming device body, the detector that is provided with then not shown in the figures works, and by last lifting motor the base plate of stow paper bundle is upwards promoted.At this moment, rub of the direction of arrow revolution of paper arm 61 with the hands, be arranged on the position that is lower than suitable paper supply position towards Fig. 6 (a).Again, front and back pawl 64a, the 64b at supporter 64 two ends of small pulley 63, its front side is set at thrust piece 69 (the conveying guiding of the auxiliary paper of holding concurrently of outlet roller 66, big belt wheel 62, so that can realize stable conveying when changing in the space of necessity) the block 68a of leading section limit, its rear side is set at the block 68b restriction of the leading section of rubbing paper arm 61 with the hands, be limited respectively under the rotating state of anticlockwise direction, small pulley 63 becomes and the big almost parallel positioning states standby (with reference to Fig. 6 (a)) of belt wheel 62.

Paper Shu Shangsheng, topmost paper begins to contact the elastic webbing 65 of rubbing paper unit 10A with the hands, still, touches the elastic webbing 65 (with reference to Fig. 6 (b)) of small pulley 63 sides at first, if further up pushing is then with the elasticity zone face contact (with reference to Fig. 6 (c)) until big belt wheel 62 sides.

If further rise,, rub paper arm 61 swing revolution along clockwise direction with the hands by rubbing paper unit 10A with the hands.If detect fixed suitable paper supply height with the paper supply height sensor (not shown) of the swing interlock of rubbing paper arm 61 with the hands, then stop to drive lifting motor (with reference to Fig. 6 (c) and Fig. 6 (d)).Therefore, obtain being used for the suitable paper supply height of paper supply, simultaneously, topmost paper contacts with the big belt wheel 62 of leap elastic webbing 64 and the belt length of small pulley 63.

In addition, at this moment supporter 64 turns round somely toward the clockwise direction, and therefore, pawl 64a, the 64b of supporter 64 and

block

68a, 68b keep suitable gap (δ 1 among Fig. 6 (c), (d), δ 2).

Pawl separates with block, and the contact surface of band is copied paper, keeps area of contact, therefore, and δ 1 ≒ δ 2.The difference gap of front and back is the precision and the inclined degree that contacts paper that constitute each parts in gap, particularly generation such as inclined back and forth degree, still, if allow with interior in difference gap to a certain degree, for rubbing paper with the hands, carry, can carry out well, also have, also copy paper when having rubbed the paper supply action with the hands, roughly can guarantee parallel between big belt wheel 62 and the small pulley 63, therefore, can prevent the band displacement of elastic webbing 65.

In order to obtain to rub with the hands the carrying capacity of paper unit 10A, it is center anticlockwise direction revolution with fulcrum 60 that stranding paper arm 61 makes it by the pressurization of spring (not shown).Thus, when the top paper is placed in the paper supply height, at elastic webbing 65 and the suitable stress of paper setting topmost.

Below with reference to the section drawing of the paper feed of Fig. 7, the paper supply action is described.

If send the instruction that paper supply begins, then insert when driving outlet roller 66, drive transmitting is to the driving input gear 62d of portion of the big belt wheel 62 of the stranding paper unit 10A of connection gear, big belt wheel 62 and outlet roller 66 equidirectional revolutions.Follow the revolution of big belt wheel 62, elastic webbing 65 turns round equally in the same direction.

Rub the convergent force of paper unit 10A owing to elastic webbing 65 with the hands, the sliding surface of big belt wheel 62 and supporter 64 is crimped, and again, supporter 64 and small pulley 63 are crimped at the recess of supporter 64.If big belt wheel 62 and elastic webbing 65 revolutions, between then big belt wheel 62 and the supporter 64, and between small pulley 63 and the supporter 64, owing to produce the slip load of each contact surface, supporter 64 is the center with the fulcrum shaft 61a of big belt wheel 62, with big belt wheel 62 towards equidirectional revolution.It is to pass through big belt wheel 62 because of outlet roller 66 that this supporter 64 is desired towards the rotating character of anticlockwise direction, because of making elastic webbing 65 revolutions, bring inertia for all the time supporter 64, the fulcrum shaft 61a that supporter 64 is desired with big belt wheel 62 is the center, towards turning round (the thick direction of arrow C among Fig. 7) with big belt wheel 62 equidirectionals.

Like this, with the paper of paper topmost the contact surface of all-the-time stable is arranged, can rub the top paper on one side with the hands Yi Bian keep the zone face that sets up by big belt wheel 62 and small pulley 63.The top paper after having rubbed with the hands is admitted to separation means 11A.

Separation means 11A is made up of the outlet roller 66 and the separate roller double-type with it 67 that are installed in freely rotating on the fulcrum 60, separate roller 67 is by the drive source that separates with outlet roller 66 drive sources, by limiter of moment not shown in the figures, can just contraryly give pivotally and the rightabout revolution driving of the throughput direction of outlet roller 66.

When the paper of sending here from stranding paper unit 10A was one, separate roller 67 was sent to image forming part along with outlet roller 66 revolutions with paper.When following paper topmost, following paper is overlapping when sending here, and separate roller 67 is towards the dotted arrow direction revolution of Fig. 7, and the paper below making sends back to the conveying upstream side, heavily send preventing.

Rub paper unit 10A with the hands when paper is delivered to separated part 11A really, paper-rubbing mechanism can have two kinds of actions.A kind of be whenever send a piece of paper make to rub with the hands the relative paper in paper unit connect from method (back can describe in detail), another kind is the method that often connects with paper.Often connecing in the method,, stopping driving stranding paper unit for arrived separated part, enough proper timing of the conveying roller in downstream more by the paper rubbed, after paper is sent into body, in the paper feed timing of opening paper down method of driving again, during this period, rub the paper unit with the hands and be in all the time and the paper state of contact.

With the relative paper of narrating later connect from method compare since do not need to be used for rub with the hands the paper unit connect from mechanism, the densification of device becomes possibility, is the good method of cost performance.

Be described in detail in below relative paper connect from method in action.

Relatively paper connect from method compare with often connecing method, be more the method that prevents from heavily to send as emphasis.Rub the revolution of paper arm 61 clockwise directions with the hands, separate (with reference to Fig. 6 (e)) from paper.This is in order to make the separating action of separated part 11A reliable, to remove from paper by rubbing paper unit 10A with the hands, remove because of rubbing the pushing to paper that paper unit 10A produces with the hands, thus, can giving full play to the function of the separate roller 67 among the separated part 11A.

Stranding paper unit 10A and outlet roller 66 after the paper separation turn round synchronously, even in released state, also can continue revolution.At this moment, small pulley 63, turns round towards anticlockwise direction because the revolution of elastic webbing 65 produces towards anti-clockwise revolution inertia with the supporter 64 that supports it, pawl 64a, the 64b and block 68a, the 68b that are installed in supporter 64 front and back join, and the anticlockwise direction

revolution stops.Block

68a, 68b location makes that small pulley 63 and big 62 one-tenths of belt wheels are parallel, and therefore, small pulley 63 and belt wheel 62 greatly can keeping parallelisms, can prevent that elastic webbing 65 is axially displaced towards belt wheel.

If block has only one-sided the time, perhaps before and after stop location when uneven, supporter 64 forms and, small pulley 63 and big belt wheel 62 can not keeping parallelisms, and the band displacement of the rib height of big belt wheel 62 takes place even surpasses.

So, rub paper unit 10A with the hands when paper separates, also prevent with displacement, the position that can keep elastic webbing 65 can continue to carry out stable paper supply action.

Also have, if continue the paper supply action, paper supply height meeting step-down, the paper supply height sensor starts once again, and lifting motor in the driving promotes paper until suitable paper supply height and position.Like this, the suitable amplitude that highly has to a certain degree of paper supply height, but in paper feed of the present invention, copy the paper height, rub the paper unit with the hands and follow, therefore, with the area of contact of paper no change and stable all the time, the change of carrying capacity also seldom can obtain stable paper supply performance.And paper can be sent here successively, paper Shu Gaodu step-down, but the rising mechanism by paper sometimes, the angle of paper change (with reference to Fig. 8).

Even in such occasion, by setting the position of block, pawl and the gap between the block (δ 1, δ 2) (with reference to figure 6 (c), figure 6 (d)) in the time of can guaranteeing to prepare before the aforementioned paper supply, till paper in box does not have, like this, the area of contact of paper and band is stable, can obtain enough carrying capacitys.

The rough segmentation of paper rising mechanism is broadly divided into two class rising mechanisms.A kind of is the horizontal type paper rising mechanism that paper stow floor level is risen, and another kind is to make paper stow base plate promote the apsacline paper rising mechanism of throughput direction front.In horizontal type paper rising mechanism, also comprise for bevelled paper angle, the limit makes the paper angle keep certain, the mechanism of Bian Shangsheng.

Horizontal type paper rising mechanism makes the paper bundle keep the parallel rising of certain angle, and is certain all the time with the angle of rubbing the paper that paper portion joins with the hands.Even this occasion is rubbed paper and supply with the hands transporting with the band one of conventional art, also can get the stability of transporting to a certain degree.But as mentioned above, the suitable amplitude of paper supply height must have, and therefore, the area of may not keeping in touch is certain.

In apsacline paper rising mechanism, to the end till a piece of paper, the angle of paper is inclination gradually, angle steepening (with reference to Fig. 8) from paper bundle at full load.In the paper-rubbing mechanism of the rising mechanism that the angle of such paper changes, stranding is in the past risen and supplies with the conveying of band one, and the swing of having rubbed with the hands is a fulcrum with the axis body of supplying with, therefore, the paper angle of variation can not be followed, satisfied transportation performance can not be obtained.

For example, in the following paper supply (with reference to Fig. 1 of patent documentation 1) that patent documentation 1 is supplied with, from the mechanism that exports successively down, the paper of the bottom position of stow is carried out the position of paper supply, and promptly the paper supply height is certain all the time, in addition, no matter stow paper is many or few, the paper angle can not change.The paper feed and the general paper supply that begins to send successively from the paper of paper bundle uppermost position that are provided with this mechanism compare, and are that qualification is quite arranged for the paper feed that is adopted undoubtedly.Certainly, even so following paper supply paper feed, paper feed proposed by the invention also can be corresponding.

[embodiment 2]

As an alternative embodiment of the invention, as shown in Figure 9, be one of dust head in the paper-feeding mechanism of a small amount of stow, adopt to begin the last paper supply way of paper supply successively, even there is not the paper feed of paper Shu Shangsheng mechanism also can use from uppermost paper.The 80B of this mechanism is because the mechanism of not rising, will step-down behind the each paper supply of paper stow height, and still, rub paper unit 10A ' with the hands and copy paper stow height, follow paper.That is to say,, rub the paper unit with the hands and can swing, rub paper unit 10A with the hands and copy paper by rubbing paper arm 61 with the hands even this paper supply height change is arranged, therefore can be corresponding.

In the present invention, not that the function that rises and supply with of the feasible stranding seen in the conventional art is integrated, but stranding paper function is improved widely than conventional art, rubbing paper unit 10A self with the hands can swing, though paper supply variation in altitude or paper angles shifts, but the also area of contact of all-the-time stable paper, can obtain the large tracts of land contact, therefore, can carry out paper supply to ground paper that up to now can not paper supply, can provide can corresponding various paper supply position control mechanisms paper feed.

The attainable reason of the long lifetime of paper-rubbing mechanism is that by using tape member, area of contact increases, pressure to band reduces, alleviate the abrasion that the friction because of band brings, and make outer perimeter longer than pickup roller in the past, face area increases part can suppress the thickness minimizing.

That is to say, in the present invention, can realize rubbing with the hands paper unit densification, size and paper-rubbing mechanism in the past are constant.Also have, make that rubbing the paper unit with the hands is modularity, make it easy replacing, simultaneously, also can freely change with pickup roller in the past.Therefore small pulley needs not to be ducted body by support body supports, also can be solid.Like this, pulley diameters can reduce, and the distance between the belt wheel also can shorten, and therefore, stranding paper unit self is dwindled.Also have, because the convergent force of elastic webbing, big belt wheel and small pulley and its supporter form one, can realize as the modularity of rubbing the paper unit with the hands.Therefore, when changing the unit, can from device, take out the unit and simply exchange with new unit.Have, for example pickup roller is general with other transportation means to make fulcrum again, and both sides all can load and unload, therefore, can be according to using separately uses such as stationery and paper are thick, the degree of freedom of device improves (with reference to Fig. 2 and Figure 10).

The posture (bump when preventing that box from inserting) of the band when keeping no box readiness for action, and rubbing with the hands on the paper function prevents from heavily to send performance for what improve the separated part that is in the downstream, whenever send a piece of paper, to rub the paper unit with the hands and keep out of the way, and at this moment, produce and rub paper unit idling conditions with the hands from paper.

If commentaries on classics is taken back the time in idle running, supporter because and the slip load between the big belt wheel, can be the center with the fulcrum shaft and big belt wheel inertia turning in the same direction.At this moment, the block of the pawl of supporter both sides and paper feed body joins, and can keep the parallelism of small pulley and big belt wheel, can prevent thus with displacement.

Owing to make that the band contact surface both ends of big belt wheel are littler than central external diameter, improve to stop and be with the effect that is shifted vertically, simultaneously, the face of at both ends pathization makes supporter slide, and can increase the contact angle of big belt wheel and supporter, therefore, increase the degree of stability of supporter, simultaneously, keep the parallelism of big belt wheel and small pulley, can eliminate the undesirable condition that brings by the displacement of being with.Also have, the outer width of the sliding part of the insied width of the flange by making big belt wheel and the both sides of supporter is provided with the gap of appropriateness, set the axial action of small pulley supporter, can limit the axial action of supporter and oblique, therefore, as mentioned above, the parallelism of big belt wheel and small pulley can be kept, the undesirable condition that brings by the band displacement can be eliminated.Hence one can see that, if supporter tilts, can not keep and the parallel position of big belt wheel concerns, then can with displacement.

Explanation is about realizing the simplification of component parts, the cost degradation of component parts.If the small pulley of slave end is disposed at the conveying downstream of the big belt wheel of drive side, small pulley since the revolution inertia that propulsive effort produces break away from from paper.In order to prevent that this situation from keeping area of contact, must utilize spring etc. that thrust pressure is put on the paper side, like this, spring and this spring portion material of configuration etc. necessitates.Therefore, be disposed at the conveying upstream side of the big belt wheel of drive side by small pulley,, therefore, can keep stable contact surface towards the direction revolution that contacts with paper with slave end.Owing to the spring and the incident parts etc. that are provided with thereof that do not need to push usefulness in the small pulley side, component parts is cut down, and can realize cost degradation.

In being provided with the paper feed of a plurality of sheet feed sections, at least one of a plurality of sheet feed sections, be provided with the related paper-rubbing mechanism of invention of record among any of the invention described above technical scheme (1)-(5), therefore, only to have need to carry as ground paper and the envelope than the paper feed of the sheet shaped piece of higher rigidity, dispose aforementioned paper-rubbing mechanism, owing to can exchange, can provide more cheap paper feed easy to use for the user in addition with other paper feed.

Above with reference to description of drawings example of the present invention, but the present invention is not limited to above-mentioned example.Can do all changes in the technology of the present invention thought range, they all belong to protection scope of the present invention.

Claims

1. a paper feed is supplied with the paper as recording medium, comprising:

Body, these body loading and unloading relatively of described paper feed;

Fulcrum (60) is arranged on the described body; And

Paper-rubbing mechanism (80A), contact is also rubbed paper with the hands;

Described paper-rubbing mechanism comprises:

But swing arm (61) is provided with fulcrum shaft (61a), is installed in pivotally on the fulcrum (60) that the body of described paper feed is provided with; And

Rub paper unit (10A) with the hands, but be installed in pivotally on the fulcrum shaft (61a) of described swing arm (61);

Described stranding paper unit comprises:

Cyclic spring band (65), its outer annular surface contacts with recording medium;

First belt wheel (62) is contained on the fulcrum shaft (61a) pivotally;

Supporter (64), around fulcrum shaft (61a) revolution, and, can be along the outer cycle slip of first belt wheel (62);

Second belt wheel (63) is supported by supporter (64); And

Band (65) is erected on first belt wheel (62) and second belt wheel (63);

The interior week of described band (65) is than all length by above-mentioned first belt wheel (62), supporter (64) and second belt wheel (63).

2. paper feed according to claim 1 is characterized in that:

The supporter (64) of above-mentioned stranding paper unit (10A) comprises pawl (64a, 64b), and its two side ends from supporter (64) is extended;

Paper-rubbing mechanism (80A) further comprise block (68a, 68b), it is located at the two side ends of first belt wheel (62) and second belt wheel (63), so that stop described pawl (64a, 64b);

(68a, when 68b) contacting, first belt wheel (62) and second belt wheel (63) are configured to roughly parallel to each other with described block when described pawl (64a, 64b).

3. paper feed according to claim 1 and 2 is characterized in that:

At least one comprises rib (71) in described first belt wheel (62) and second belt wheel (63), is arranged on the two ends of belt wheel, prevents that elastic webbing is from predefined offset;

The both sides of the belt wheel that contacts with elastic webbing (62a, external diameter 62b) is littler than the external diameter of belt wheel center (62c);

Supporter (64) comprises sliding surface (64c, 64d), and its width equates with the both sides width of belt wheel.

4. according to any described paper feed among the claim 1-3, it is characterized in that:

Above-mentioned first belt wheel (62) comprises driving input gear (62d);

Along the throughput direction of recording medium, second belt wheel (63) is arranged on the upstream side of first belt wheel (62).

5. according to any described paper feed among the claim 1-4, it is characterized in that:

Further comprise a plurality of sheet feed sections;

At least one comprises described paper-rubbing mechanism (80A) in above-mentioned a plurality of sheet feed section.

6. image read-out is characterized in that:

This image read-out is provided with any described paper feed among the claim 1-5.

7. image processing system is characterized in that:

This image processing system is provided with any described paper feed among the claim 1-5.

8. image processing system is characterized in that:

This image processing system is provided with the image read-out described in the claim 6.

9. the image processing system described in according to Claim 8 is characterized in that:

10. the image processing system described in according to Claim 8 is characterized in that: