CN106542358B - Pickup pressure adjustmenting mechanism and image processing system - Google Patents

Pickup pressure adjustmenting mechanism and image processing system Download PDF

Info

Publication number
CN106542358B
CN106542358B CN201510589135.0A CN201510589135A CN106542358B CN 106542358 B CN106542358 B CN 106542358B CN 201510589135 A CN201510589135 A CN 201510589135A CN 106542358 B CN106542358 B CN 106542358B
Authority
CN
China
Prior art keywords
pickup
force
paper
engaging
roller
Prior art date
Application number
CN201510589135.0A
Other languages
Chinese (zh)
Other versions
CN106542358A (en
Inventor
杨蕴震
Original Assignee
柯尼卡美能达办公系统研发(无锡)有限公司
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
Application filed by 柯尼卡美能达办公系统研发(无锡)有限公司 filed Critical 柯尼卡美能达办公系统研发(无锡)有限公司
Priority to CN201510589135.0A priority Critical patent/CN106542358B/en
Publication of CN106542358A publication Critical patent/CN106542358A/en
Application granted granted Critical
Publication of CN106542358B publication Critical patent/CN106542358B/en

Links

Abstract

The present invention relates to a kind of pickup pressure adjustmenting mechanism and possesses the image processing system of the pickup pressure adjustmenting mechanism, can with it is easy construct and cheap cost and it is automatic and dynamically adjust pickup pressure, the clockwise bad of pickup roller can be improved, so as to prevent the service life resend and extend pickup roller of paper.Pickup pressure adjustmenting mechanism possesses:Supporting member;Pickup roller, it is arranged on pickup roll shaft, is rotated together with the pickup roll shaft;Limiter of moment, it applies pickup roller the torque for pickup;Ratchet, it is rotated together with pickup roll shaft and pickup roller;Link the arm of force, it is arranged at supporting member, can be rotated by fulcrum of pivot, and one end of the linkage arm of force can engage with ratchet;And force application part, it is adjusted pickup pressure by the fastening state of ratchet and the linkage arm of force.

Description

Pickup pressure adjustmenting mechanism and image processing system

Technical field

The present invention relates to pickup pressure adjustmenting mechanism and possess the image processing system of the pickup pressure adjustmenting mechanism, it is special Be not be related to it is a kind of can with it is easy construct and cheap cost and it is automatic and dynamically adjust the pickup pressure of pickup pressure Power adjustment mechanism.

Background technology

In the past, it is known that image processing system (such as compounding machine, mainly illustrated in of the invention by taking compounding machine as an example) tool Standby paper-rubbing mechanism.Fig. 1 is the schematic diagram for a part of structure for showing the existing compounding machine for possessing paper-rubbing mechanism.Such as the figure institute Show, compounding machine possesses paper feed roller 1, which is driven by a motor and rotates, when using conveying mechanism (such as conveyer belt etc., not Diagram) by paper sheet delivery to so-called " roller pinch area ", (paper feed roller 1 coordinates with pickup roller 2 described later and paper is pressed from both sides The region held) when, which contacts with paper and produces frictional force, will along the conveying direction of paper using the frictional force Paper is supplied to designated position.

Compounding machine is also equipped with paper-rubbing mechanism, which possesses:Pickup roller 2, its it is arranged opposite with paper feed roller 1 and every Constant gap is opened, (pickup roller 2 coordinates with foregoing paper feed roller 1 and paper is pressed from both sides when paper sheet delivery to roller pinch area The region held) when, which contacts with paper and carries out pickup;Limiter of moment, it is fixed in a manner of arranged coaxial Above-mentioned pickup roller 2, or be connected in the case of non-coaxial by gear or synchronous belt with pickup roller 2, thus to pickup roller 2 Apply the torque for pickup;And pickup spring 3, it applies pickup pressure to pickup roller 2 towards the direction of paper feed roller 1.

In the technical field of image processing system according to the present invention, in order to efficiently be formed on medium (paper) High-quality image, it is necessary to ensure that convey paper one by one, once resending for paper occurs, will necessarily result in and produce paperboard event Barrier etc., resending for paper herein refer to that the paper of more than one enters the situation of roller pinch area.Therefore, precisely in order to avoiding Produce above-mentioned multiple sheet feed phenomenon and above-mentioned paper-rubbing mechanism is just configured in existing compounding machine.

For existing compounding machine, in the case that the paper more than one enters roller pinch area, with paper feed roller A piece of paper directly contacted moves smoothly through roller and clamps area by frictional force (paper supply power) caused by being contacted with paper feed roller Domain, paper below then stop movement because of the resistance (paper-rubbing force) applied via limiter of moment, therefore ensure that directly with A piece of paper of paper feed roller contact moves smoothly through roller pinch area, avoids resending for paper.

The anti-basic principle for resending function of paper-rubbing mechanism is provided a brief description above, there it can be seen that in order to Ensure good anti-to resend function, it is necessary to set appropriate paper supply power and paper-rubbing force (resistance), which needs satisfaction to hinder Only more than one paper is by paper feed roller and the clamp-press part of pickup roller, and will not cause the local mill of pickup roller for providing resistance Damage and as paper and roller surface it is opposite slide caused by pickup abnormal sound etc. it is bad.Since the paper supply power is main Depending on the pickup pressure applied by pickup spring, the paper-rubbing force depends primarily upon the limitation applied by limiter of moment Torque, therefore, essentially to ensuring that the good anti-function that resends must set appropriate restraining moment and pickup pressure.Under Face, is described in detail this.

Fig. 2 be show run well when and occur multiple sheet feed when paper supply power and paper-rubbing force between relation and rub with the hands Paper and prevent multiple sheet feed principle figure.In the figure, 1 paper feed roller is represented, 2 represent pickup roller, which is set effectively Square limiter, 4 represent to take paper bowl, and direction from left to right is set to the direction X that paper passes through, by what is rotated counter-clockwise Direction is set to the clockwise direction of the paper feed roller 1 of top, and the direction being rotated clockwise is set to the clockwise side of the pickup roller 2 of lower section To, pickup roller 2 usually a piece of paper by when carry out it is clockwise, and when more than two paper by when due between two pieces of paper Frictional force it is small, under the moment loading of limiter of moment, pickup roller reverses (counterclockwise rotate) to prevent the weight of paper Send.In addition, the pickup pressure applied by pickup spring is set to N, the friction coefficient between paper and pickup roller is set to μ 1, will Friction coefficient between paper and paper feed roller is set to μ 2, and the friction coefficient between paper and paper is set to μ 3, torque is limited The torque that device applies is set to T, and the radius of pickup roller is set to R, the paper supply power applied to paper is set to Fg, its direction direction Right side, F is set to by the paper-rubbing force applied to paperc, its direction is towards left side.

When compounding machine operates, paper is conveyed one by one, paper feed roller and pickup roller are each along clockwise side To rotation, also, restraining moment T is constant, static friction is produced between pickup roller and paper feed roller and paper, the degree of wear is very It is small, so that, in this condition, friction coefficient μ 1, μ 2 also keep relative constancy value.Thus, paper-rubbing force at this time and paper supply power it Between meet following formula.

Fc<Fg······(1)

In addition, FcIt is the resistance depending on restraining moment T, when pickup roller is not clockwise, Fc1 × N of=μ<T/R;Work as pickup roller When clockwise, Fc=T/R>μ1×N.It follows that in order to ensure clockwise, it is necessary to meet following formula, otherwise will be clockwise bad.

Fc=T/R (2)

On the other hand, FgIt is the frictional force depending on pickup pressure N, according to mechanical knowledge, following formula is set up.

Fg2 × N of=μ (3)

Therefore, above formula (2), (3) are brought into formula (1), following formula can be transformed to.

T/R<μ2×N······(4)

And then above formula (4) can be transformed to following formula.

T<μ2×N×R······(5)

That is, in order to ensure run well when it is clockwise, it is necessary to meet above formula (5).However, if paper powder falls to stranding Paper bowl surface, then can cause pickup roller surface to become smooth, be had skidded between paper and pickup roller, that is to say, that cause to rub with the hands Friction coefficient μ 1 between paper bowl and paper reduces, thus is likely to result in formula (5) and can not set up, so as to can not realize normal It is clockwise.In this case, it is necessary to which paper powder etc. is removed.

In addition, in addition to causing friction coefficient μ 1 to reduce because of paper powder, it is also possible to because of pickup roller abrasion in itself Cause friction coefficient μ 1 to reduce, in this case, can not be realized normal suitable it is also possible to cause formula (5) not set up Turn.In this case, it is necessary to be replaced to pickup roller.In addition, in the case where pickup roller is worn in itself, except friction Coefficient μ 1 is possible to outside reduction, and the radius of pickup roller can correspondingly reduce, consequently, it is possible to the possibility that formula (5) can not be set up Further increase, so as to can not more realize normal clockwise.Thus, it can not ensure because pickup roller is subject to severe abrasion It is normal it is clockwise in the case of, it is necessary to be replaced to pickup roller.

On the other hand, in the case where taking paper at a high speed, paper is resend, it is necessary to make pickup roller reverse to realize in order to prevent The paper resend is sent back to, in order to realize the reverse of the pickup roller in the case where resending, it is necessary to meet T/R>Fc, when more than one Paper by (generation multiple sheet feed) when, meet Fc3 × N of=μ.If restraining moment T, pickup pressure N, pickup roller are assumed at this time Radius R does not change, since the friction coefficient μ 3 between paper and paper is less than the friction system between paper and pickup roller Number μ 1, thus, Fc3 × N of=μ<μ1×N.Thus, in order to make pickup roller reverse, it is necessary to meet F in the case where resendingc=μ 3 × N<μ1×N<T/R。

It can be seen from the above that in above-mentioned each parameter, if particularly restraining moment T, the initial value of pickup pressure N set just When the reverse of pickup roller can then being realized, so as to only make a piece of paper of the top move smoothly through, as the paper sheet underneath Other paper, then can make them stop mobile and reversely send paper back to, thus, it is possible to prevent resending for paper.

In addition, even if resending for paper does not occur, sent out in itself in the surface of pickup roller or pickup roller if paper powder etc. drops Raw abrasion, then the radius R of friction coefficient μ 1 or pickup roller can correspondingly reduce, and be also possible to cause pickup roller generation inverse at this time Turn.But reverse in this case is but not intended to its generation.

Thus, the function of multiple sheet feed is prevented, it is necessary to increase restraining moment T or reduce pickup pressure N in order to realize, but It is, if the setting of restraining moment T or pickup pressure N are improper, that is to say, that restraining moment T excessively increase or pickup pressure N Excessively reduce, and pickup roller can be caused clockwise or clockwise not smooth, ultimately result in pickup roller concentrated wear and seriously lose Prevent the function of multiple sheet feed, or produce serious pickup abnormal sound.Thus, only rightly set restraining moment T or Pickup pressure N could stably realize the function of preventing multiple sheet feed.

Fig. 3 is to show restraining moment T and pickup pressure N for the clockwise of pickup roller and prevent the function of multiple sheet feed Influence figure.In the Fig. 3, L1 represents clockwise boundary line, and L2 represents to resend boundary line, and symbol "○" represents low in low temperature The good data of test result in the environment of humidity or high-temperature high humility, symbol " △ " represent in low temperature low humidity or The data of test result qualification in the environment of person's high-temperature high humility, symbol "×" are represented in low temperature low humidity or high temperature Spend the underproof data of test result in the environment of high humility.According to the Fig. 3, restraining moment T is bigger, pickup pressure N It is smaller, be more conducive to prevent the function of multiple sheet feed, but be more unfavorable for the clockwise of pickup roller.Conversely, restraining moment T is smaller, Pickup pressure N is bigger, is more unfavorable for preventing the function of multiple sheet feed, but more beneficial to the clockwise of pickup roller.In the prior art, lead to Often the value of the two parameters is set in figure by the safe range shown in rectangle by selection.

However, during the manufacturing, the accuracy of manufacture of spring is ± 10%~± 15%.It is opposite in restraining moment (in fact, limiter of moment also has certain deviation in actual production, it is assumed herein that it is relatively steady in the case of stabilization It is fixed), if pickup pressure is less than normal, it is likely that cause clockwise not smooth, another aspect, if pickup pressure is bigger than normal, it is likely that cause Paper is resend.The reason for this is that if pickup pressure is big, the frictional force between paper can be caused to increase, so that in order to make it Separate and just need the restraining moment of bigger, in the case where sufficiently large restraining moment can not be applied, be just difficult to paper point Open, so as to inevitably result in resending for paper.In addition, using pickup roller the pickup roller can be caused to wear for a long time, companion With with this, friction coefficient can reduce, and pickup roller radius can also reduce.In this case, the extension spring for pickup is caused Amount of tension reduces or the span increase (decrement reduction) of compression spring, so as to cause pickup pressure to reduce, and then causes to send out The possibility of raw multiple sheet feed is sharply increased.In addition, due to long-term abrasion, cause pickup roller surface to become smooth, rub Wipe coefficient excessively to reduce, consequently, it is possible to can not equally prevent resending for paper.

In order to solve as above problem, in the technical solution described in patent document 1, caused using the complicated mechanism of construction The change transitions of restraining moment during logical paper are the change of pickup pressure, so that restraining moment and pickup pressure are equal In safe range.But the construction of the mechanism is excessively complicated, the cost of consuming is quite high.Moreover, the program is primarily suitable for Paper-rubbing mechanism uses the high speed machine of reverse pickup mode, and high speed machine needs to reverse to ensure the reliability of pickup, basic nothing The non-reverse paper-rubbing mechanism of low speed during method solves the problems, such as.

In addition, in order to solve as above problem, in the technical solution described in patent document 2, when when resending of paper occurs, Pickup pressure is adjusted using reponse system, this method is fairly simple and effective.But the shortcomings that program is, need Extremely accurate detecting system and servo-drive system are wanted, causes its cost excessive.

Patent document 1:Japanese Unexamined Patent Publication 2014-111504 publications

Patent document 2:Japanese Unexamined Patent Publication 2002-7735 publications

The content of the invention

The present invention be in view of said circumstances and complete, its purpose is to provide a kind of pickup pressure adjustmenting mechanism and Possesses the image processing system of the pickup pressure adjustmenting mechanism, which can be constructed and low with easy Honest and clean cost and extend pickup roller service life.

An embodiment of the invention provides a kind of pickup pressure adjustmenting mechanism, it is used for the image for possessing main body frame In forming apparatus, possess:Supporting member;Pickup roller, it is arranged on pickup roll shaft, is rotated together with the pickup roll shaft, when Paper sheet delivery to the pickup roller working region when, which contacts with paper and carries out pickup;Limiter of moment, it is to institute State pickup roller and apply the torque for being used for pickup;Engaging part, it is arranged at one end of the pickup roll shaft, with the pickup roll shaft And pickup roller rotates together;Link the arm of force, it is arranged at the supporting member, the linkage arm of force can using pivot as fulcrum and Rotate, one end of the linkage arm of force can engage with the engaging part;And force application part, its by the engaging part and The fastening state of the linkage arm of force is adjusted pickup pressure.

In above-mentioned pickup pressure adjustmenting mechanism, it is preferable that in the case where the pickup roller is normally clockwise, the linkage arm of force quilt The engaging part continuously flicks, and the pickup roller it is clockwise it is undesirable in the case of, it is described linkage the arm of force by intermittently Flick or the linkage arm of force engages completely with the engaging part.

In above-mentioned pickup pressure adjustmenting mechanism, it is preferable that the force application part includes:First force application part, its one end One end that can be engaged with the engaging part of the linkage arm of force is arranged at, the other end is arranged at the supporting member;With And second force application part, its one end are arranged at the main body frame, the other end be arranged at the linkage arm of force can not with it is described One end of engaging part engaging.

In above-mentioned pickup pressure adjustmenting mechanism, it is preferable that the force application part includes:First force application part, its one end One end that can not be engaged with the engaging part of the linkage arm of force is arranged at, the other end is arranged at the supporting member;With And second force application part, its one end are arranged at the main body frame, the other end be arranged at the linkage arm of force can not with it is described One end of engaging part engaging.

In above-mentioned pickup pressure adjustmenting mechanism, it is preferable that first force application part and second force application part It is extension spring or compression spring.

In above-mentioned pickup pressure adjustmenting mechanism, it is preferable that be both provided with the engaging at the both ends of the pickup roll shaft Component, the linkage arm of force, first force application part and second force application part.

In above-mentioned pickup pressure adjustmenting mechanism, it is preferable that the engaging part is ratchet.

In above-mentioned pickup pressure adjustmenting mechanism, it is preferable that the engaging part is cam, is set in the inside of the cam It is equipped with one-way clutch.

In above-mentioned pickup pressure adjustmenting mechanism, it is preferable that the limiter of moment is separately set with the pickup roller.

In above-mentioned pickup pressure adjustmenting mechanism, it is preferable that the limiter of moment is wholely set with the pickup roller.

Other embodiments of the present invention provide a kind of image processing system, which is characterized in that, have It is standby:Main body frame;Pickup pressure adjustmenting mechanism described in any of the above-described technical solution;And paper-feeding mechanism, itself and the pickup Pressure adjustmenting mechanism cooperates and ensures swimmingly to convey paper.

According to above-mentioned pickup pressure adjustmenting mechanism and possess the image processing system of the pickup pressure adjustmenting mechanism, can Pickup pressure is automatically adjusted with easy construction and cheap cost, the clockwise bad of pickup roller can be improved, prevented Concentrated wear, ensure it is anti-resend function on the premise of, it is bad to improve pickup abnormal sound, paperboard etc., and can extend and make Use the service life.

Brief description of the drawings

Fig. 1 is the schematic diagram for a part of structure for showing the existing compounding machine for possessing paper-rubbing mechanism.

Fig. 2 be show run well when and occur multiple sheet feed when paper supply power and paper-rubbing force between relation and rub with the hands Paper and prevent multiple sheet feed principle figure.

Fig. 3 is to show restraining moment T and pickup pressure N for the clockwise of pickup roller and prevent the function of multiple sheet feed Influence figure.

Fig. 4 is the structure chart for schematically showing image processing system entirety.

Fig. 5 is the stereogram for the structure for showing existing pickup pressure adjustmenting mechanism.

Fig. 6 is the stereogram for the structure for showing the pickup pressure adjustmenting mechanism involved by an embodiment of the invention.

Fig. 7 be to the pickup pressure adjustmenting mechanism involved by an embodiment of the invention when pickup roller is normally clockwise Adjustment pickup pressure the schematic diagram that illustrates of action.

Fig. 8 be to the pickup pressure adjustmenting mechanism involved by an embodiment of the invention when pickup roller is clockwise bad Adjustment pickup pressure the schematic diagram that illustrates of action.

Fig. 9 is completely not clockwise in pickup roller to the pickup pressure adjustmenting mechanism involved by an embodiment of the invention When adjustment pickup pressure the schematic diagram that illustrates of action.

Figure 10 (a), Figure 10 (b) they are the figures illustrated to the range of parameter values of pickup pressure and restraining moment, wherein, Figure 10 (a) shows desired range of parameter values in practical application, and Figure 10 (b) shows to be possible to reach after long-time service pickup roller Range of parameter values.

Figure 11 is the schematic illustration that power suffered when being acted to pickup pressure adjustmenting mechanism is analyzed.

Figure 12 (a), Figure 12 (b) are to existing paper supplying system and possess pickup pressure adjustmenting mechanism according to the present invention Paper supplying system the figure that is compared of actual effect.

Figure 13 is the figure illustrated to other embodiments of the present invention.

Figure 14 is the figure illustrated to other embodiments of the present invention.

Embodiment

Hereinafter, the preferred embodiment of the present invention is described in detail based on attached drawing.In addition, for people in the art For member, their a variety of alternatives can be realized under the enlightenment of these embodiments, the present invention is not limited thereto, and place is said Bright preferred embodiment.

Fig. 4 is the structure chart for schematically showing image processing system.Image forming part 100Y, 100M, 100C, 100BK Yellow (Y), magenta (M), cyan (C), the image of black (BK) are formed respectively.

The surface of photosensitive drums Y, M, C, BK and together powered, pass through light write section by electro-mechanical part 12Y, 12M, 12C, 12BK The scan exposure of 13Y, 13M, 13C, 13BK, and in photosensitive drums Y, M, C, BK formed with sub-image.In addition, in photosensitive drums Y, M, C, BK On formed with any one with yellow, magenta, cyan and black it is corresponding regulation color image (toner image).Shape Into the image on photosensitive drums Y, M, C, BK by primary transfer roller 17Y, 17M, 17C, 17BK and can be towards as banding Assigned position on the intermediate transfer belt 16 of middle transfer body transfers successively.

The image being made of the colors being transferred on intermediate transfer belt 16 is secondary transferred roller 19 and is needed on by paper sheet delivery The paper P that portion 200 conveys on defined opportunity.The secondary transfer roller 19 crimps with intermediate transfer belt 16 and forms clamp-press part and (turn Print clamp-press part) so that when conveying paper P to paper P transferred images.

Paper P is accommodated in paper supply tray 201, and the paper P for being accommodated in paper supply tray 201 is taken into by sheet feed section 202, Jin Eryou Paper sheet delivery portion 200 conveys paper P along transport path.In transport path, than transfer nip part upstream side Position is provided with multiple conveying mechanisms of conveying paper P.Each conveying mechanism conveys paper P by clamping paper P and rotating. The fixing processing that fixing device 300 is implemented to be fixed image relative to the paper P transferred with image.It is real by fixing device 300 The paper P for having applied fixing processing is discharged by exit roller 203.In addition, when the situation that image formation is also carried out at the back side of paper P Under, finish to be switched guide groove 204 to the reversion transport path being below relative to the paper P of the image formation of paper surface 205 conveyings.Reversion transport path 205 makes paper P invert and be sent out to transport path.

Fig. 5 is the stereogram for the structure for showing existing pickup pressure adjustmenting mechanism.As shown in the drawing, existing pickup pressure Power adjustment mechanism possesses:Unit framework (not shown);Paper feed roller 1, it is used to supply paper;Paper bowl 4 is taken, it is used to obtain from confession The paper that paper bowl 1 supplies;Pickup roller 2, it is used to carry out pickup;Limiter of moment 5, it is separately set with pickup roller 2, for pair Paper applies restraining moment;Bearing metal board member (not shown), it supports the pickup roller 2;Pickup compression spring 3, its one end is connected with unit framework, and the other end is connected with bearing metal board member, will by the force of the pickup compression spring Bearing metal board member pulls up, and pickup roller 2 is abutted with paper feed roller 1.

As it was noted above, there are many problems in the pickup pressure adjustmenting mechanism of said structure, herein without repeating.Cause This, the present invention implements improvement on the basis of this structure, as shown in fig. 6, improved pickup pressure adjustment of the invention Mechanism possesses:Supporting member (not shown);Pickup roller 12, it is arranged on pickup roll shaft, is rotated together with pickup roll shaft, is worked as paper When opening working region (the roller pinch area formed with the paper feed roller of compounding machine) for being delivered to the pickup roller, the pickup roller and paper Contact and carry out pickup;Limiter of moment 15, it applies pickup roller 12 torque for pickup;Ratchet 19, it is arranged at stranding One end of paper roller, rotates together with pickup roll shaft and pickup roller;Link the arm of force 17, it is formed as L-shaped, in its L-shaped Corner part be provided with through hole, which in a thickness direction penetrates through the linkage arm of force 17, the linkage arm of force 17 via The through hole and pivot is arranged at supporting member, which can be rotated using the pivot as fulcrum, the linkage power One end of arm 17 can engage with ratchet 19;Spring 16 is compressed, it is used to be adjusted pickup pressure, the compression spring 16 One end is arranged at one end that can be engaged with ratchet 19 of the linkage arm of force 17, and the other end is arranged at supporting member;And stretching bullet Spring 18, it is used to be adjusted pickup pressure, and the main body frame that one end of the extension spring 18 is arranged at compounding machine (is not schemed Show), the other end is arranged at one end that can not be engaged with ratchet 19 of the linkage arm of force 17.

Fig. 7~Fig. 9 is working method and the operation principle progress to pickup pressure adjustmenting mechanism according to the present invention The figure of explanation.Fig. 7 is that action of the pickup pressure adjustmenting mechanism according to the present invention when pickup roller 12 is normally clockwise is carried out The schematic diagram of explanation.Fig. 8 is the action when pickup roller 12 is clockwise bad to pickup pressure adjustmenting mechanism according to the present invention The schematic diagram illustrated.Fig. 9 be to pickup pressure adjustmenting mechanism according to the present invention when pickup roller 12 is not completely clockwise The schematic diagram that illustrates of action.

As shown in fig. 7, in the case of positive normal open paper, pickup roller 12 is clockwise, also, pickup roller 12 drives ratchet 19 suitable Turn.In Fig. 7~Fig. 9, the clockwise direction of pickup roller 12 is counterclockwise.In addition, 16 distich power arm of compression spring, 17 institute The torque of the pressure of application is more than the torque for the pulling force that 18 distich power arm 17 of extension spring is applied, so that, link the arm of force 17 Be formed as being intended to the trend engaged with ratchet 19.But in the case that pickup roller 12 is clockwise, linkage the arm of force 17 by ratchet 19 continuously Flick so that the linkage arm of force 17 staggers constant angle relative to ratchet 19, i.e. so that the linkage arm of force 17 is in shown in Fig. 7 Position.At this time, the one end for being provided with extension spring 18 rise of the linkage arm of force 17, the decrement increase of compression spring 16, stretching The elongation of spring 18 shortens.In addition, the other end of extension spring 18 is arranged at the main body frame of compounding machine, the extension spring 18 For providing pickup pressure, that is to say, that the pulling force of the extension spring 18 is pickup pressure.Due to extension spring 18 at this time Elongation shorten, therefore, pickup pressure at this time reduces.And then as it was previously stated, pickup pressure is smaller, be more conducive to prevent The function of multiple sheet feed, but more it is unfavorable for the clockwise of pickup roller.Further, since the linkage arm of force 17 applies pressure to ratchet 19, Therefore, the additional moment when ratchet 19 flicks the arm of force 17 that links is maximum.On the other hand, in the linkage arm of force 17 gradually and ratchet During 19 engagings, additional moment is gradually reduced.Untill the linkage arm of force 17 engages completely with ratchet 19, additional moment reaches To minimum value.Herein, the torque and flick needed for the linkage arm of force 17 that the torque that pickup roller 12 is subject to applies for limiter of moment 15 Additional moment, it is constant in the torque that limiter of moment 15 applies as described above, additional moment reduces when clockwise bad In the case of, the resultant couple suffered by pickup roller 12 reduces.Therefore, in the case of clockwise, resultant couple (restraining moment and additional force The sum of square) increase, as it was previously stated, resultant couple is bigger, be more conducive to prevent the function of multiple sheet feed, but be more unfavorable for pickup roller It is clockwise.Therefore, next, pickup roller 12 can gradually tend to clockwise undesirable state.

Pickup roller it is clockwise it is undesirable in the case of, linkage the arm of force 17 intermittently flicked, as shown in figure 8, when linkage the arm of force 17 towards during the direction rotation engaged completely with ratchet 19, and one end for being provided with extension spring 18 of the linkage arm of force 17 reduces, compression The decrement of spring 16 reduces, the elongation increase of extension spring 18, so that pickup pressure increases.Also, as it was previously stated, at this time Resultant couple reduce.Thus, it is clockwise it is undesirable in the case of, pickup pressure increase, resultant couple reduce.As it was previously stated, resultant couple Smaller, pickup pressure is bigger, is more unfavorable for preventing the function of multiple sheet feed, but more beneficial to the clockwise of pickup roller.

In addition, as shown in figure 9, pickup roller 12 is in the state that rotation stops.At this time, the linkage arm of force 17 and ratchet 19 are complete Engaging, the decrement of compression spring 16 reach minimum, and on the other hand, the elongation of extension spring 18 reaches maximum.At the same time, Resultant couple also reaches minimum.Therefore, state at this time be conducive to pickup roller 12 restart it is clockwise.

As described above, involved pickup pressure adjustmenting mechanism by virtue of this invention, can automatically adjust pickup pressure, promote Into the clockwise of pickup roller, and it can realize the function of preventing multiple sheet feed.

Figure 10 (a), Figure 10 (b) they are the figures illustrated to the range of parameter values of pickup pressure and restraining moment, wherein, Figure 10 (a) shows desired range of parameter values in practical application, and Figure 10 (b) shows to be possible to reach after long-time service pickup roller Range of parameter values.

As shown in Figure 10 (a), in the use initial stage of pickup roller, the parameter value of pickup pressure and restraining moment is located In normal range (NR).If pickup roller is clockwise bad, pickup pressure increase, and restraining moment reduce, and then if it is clockwise not Good state is not inhibited, and the scope of the parameter value of pickup pressure and restraining moment, which will enter, resends region.The opposing party Face, if pickup roller starts clockwise, since pickup pressure at this time constantly reduces, restraining moment constantly increases, therefore can lead again The scope of the parameter value of pickup pressure and restraining moment is caused to enter clockwise defective region.No matter occur in above-mentioned two situations Any situation, can automatically and dynamically be adjusted using pickup pressure adjustmenting mechanism according to the present invention so that The scope of the parameter value of pickup pressure and restraining moment reverts to normal safe range again.From solid line model in Figure 10 (b) Movement is enclosed to dotted line scope, and the scope for showing the parameter value of pickup pressure and restraining moment enters clockwise defective region Example, if being adjusted using pickup pressure adjustmenting mechanism according to the present invention, can make pickup pressure and restraining moment The scope of parameter value revert to normal safe range again, that is, realize from dotted line scope and return to solid line scope.

Figure 11 is the schematic illustration that power suffered when working pickup pressure adjustmenting mechanism is analyzed.Wherein, Fs Represent paper supply power, Fn represents pickup pressure, and T represents restraining moment, and R represents the radius of pickup roller, μ represent pickup roller and paper it Between friction coefficient.When pickup roller is clockwise, meet Fs × R>T→Fn×μ×R>The relation of T.

But as the long-time service of pickup roller, pickup roller are constantly worn, therefore cause pickup roller radius R to be gradually reduced. Further, since pickup roller is constantly worn, also, paper powder or drop in the small gap of pickup roller surface, therefore cause to rub Coefficient μ is gradually reduced.In addition, the paper feed roller of top and the pickup roller of lower section are worn at the same time, so as to cause two clamped Centre-to-centre spacing between a roller reduces, therefore, if providing pickup pressure Fn using extension spring, since the span of extension spring contracts Short (amount of tension reduction), therefore cause pickup pressure Fn to reduce.If conversely, using compress spring provide pickup pressure Fn, by Increase (decrement reduction) in the span of compression spring, therefore again result in pickup pressure Fn reductions.

With the reduction of above-mentioned pickup roller radius R, friction coefficient μ and pickup pressure Fn, balance when pickup roller is clockwise Relation is broken, and relational expression when causing above-mentioned clockwise is changed into Fs × R=T → Fn × μ × R=T, can then be caused at this time clockwise It is bad, that is to say, that to cause pickup roller discontinuously clockwise, paper can produce slipping phenomenon with the pickup roller time.Due to it is clockwise when Opposing stationary state is kept between pickup roller and paper, frictional force therebetween belongs to stiction, thus, if long-term clockwise It is bad, then the abrasion of pickup roller can be caused to aggravate, so as to cause pickup roller to lose pickup function.

And then if above-mentioned relation further deteriorates, it is changed into Fs × R<T→Fn×μ×R<T.At this time, although paper Frictional force is applied with to pickup roller, but since the frictional force is less than limitation torque T, pickup roller can stop rotating, and cause Paper is directly slipped over from the surface of pickup roller, so as to cause concentrated wear to pickup roller, ultimately results in pickup roller section and the moon is presented Tooth shape, the pickup function of pickup roller are lost therewith.At the same time, paper jam error, serious pickup noise can also correspondingly be produced And paper resends phenomenon.

In view of the above-mentioned problems, pickup pressure adjustmenting mechanism according to the present invention from it is above-mentioned clockwise when relational expression just by Break beginning to be just automatically adjusted pickup pressure so that pickup roller is restored to normal clockwise state.

Figure 12 (a), Figure 12 (b) are to existing paper supplying system and possess pickup pressure adjustmenting mechanism according to the present invention Paper supplying system the figure that is compared of actual effect, wherein, Figure 12 (a) represents the actual effect of existing paper supplying system, figure 12 (b) represents the actual effect of the paper supplying system of the paper supplying system of pickup pressure adjustmenting mechanism according to the present invention, also, horizontal Axis represents service life, and the longitudinal axis represents the performance quantified.As shown in the drawing, possesses pickup pressure tune according to the present invention The paper supplying system of complete machine structure maintains the time of normal performance and service life to be substantially better than existing paper supplying system.

Figure 13, Figure 14 are the figures illustrated to other embodiments of the present invention.In the drawings, pair with Fig. 7 The identical component of the component structure compared and function that show marks identical reference numeral, and description is omitted.In Fig. 6 institutes In the embodiment shown, one end of compression spring 16 is arranged at one end that can be engaged with ratchet of the linkage arm of force, and the other end is set It is placed in supporting member.On the other hand, in the embodiment shown in Figure 13, compression spring 16 is replaced with into extension spring 16, and One end of extension spring 16 is arranged to one end that can not be engaged with ratchet of the linkage arm of force, the other end is arranged at supporting member, Other structures are identical with the embodiment shown in Fig. 6.Involved pickup pressure adjustmenting mechanism according to the present embodiment, due to it The principle being adjusted to pickup pressure is identical with the above embodiment, therefore, the pickup pressure involved by present embodiment Power adjustment mechanism can realize the technique effect identical with the above embodiment, can be with easy construction and cheap cost And pickup pressure is automatically adjusted, the clockwise bad of pickup roller can be improved, prevent concentrated wear, ensureing to prevent resending function Under the premise of, it is bad to improve pickup abnormal sound, paperboard etc., and can prolong the service life.

In addition, it is also equipped with harmonizing spring 20, the tune in pickup pressure adjustmenting mechanism involved by embodiment in Figure 13 Quasi- spring 20 is used to harmonize extension spring 16 and extension spring 18.Specifically, when there is the clockwise of pickup roller 12 When bad, the linkage arm of force 17 is rotated towards the direction engaged with ratchet 19, so that the spring tension for pickup increases, makes stranding Paper bowl 12 is re-converted to clockwise state.Involved pickup pressure adjustmenting mechanism according to the present embodiment, due to harmonizing spring Equivalent to the component that assisting tension spring 16 and extension spring 18 adjust pickup pressure, therefore, compared with the above embodiment, Pickup pressure adjustmenting mechanism involved by present embodiment can further improve following technique effect:Can be easily to construct And cheap cost and automatically adjust pickup pressure, the clockwise bad of pickup roller can be improved, prevent concentrated wear, protected Card is anti-resend function on the premise of, it is bad to improve pickup abnormal sound, paperboard etc., and can prolong the service life.

In the embodiment shown in above-mentioned Fig. 6, Figure 13, ratchet is employed as engaging part.But in Figure 14 In involved embodiment, ratchet is replaced with into cam, and be internally embedded in cam and be provided with one-way clutch.According to this reality The pickup pressure adjustmenting mechanism involved by mode is applied, is realized in the pickup pressure adjustmenting mechanism involved by the above embodiment On the basis of effect, additionally it is possible to reduce noise.But the cost of cam is slightly above the cost of ratchet.Therefore, in actual utilization In, it is necessary to suitably choose ratchet or cam according to the difference of actual application environment.

Although extension spring or compression spring are used as force application part in the above-described embodiment, can also adopt With other force application parts.

In the pickup pressure adjustmenting mechanism involved by the above embodiment, although being only provided with one end of pickup roll shaft The engaging part such as ratchet or cam, the linkage arm of force, the first force application part (extension spring or compression spring etc.) and the second force Component (extension spring or compression spring etc.), but it is also possible to be respectively provided with the card such as ratchet or cam at the both ends of pickup roll shaft Close component, the linkage arm of force, the first force application part (extension spring or compression spring etc.) and the second force application part (extension spring Or compression spring etc.).

Although the linkage arm of force in pickup pressure adjustmenting mechanism involved by the above embodiment is formed as L-shaped, The linkage arm of force can also be formed as other shapes.

Although by limiter of moment and pickup roller split in the pickup pressure adjustmenting mechanism involved by the above embodiment Set, but limiter of moment can also be set with pickup roller and be integrated.

In addition, said so that the pickup pressure adjustmenting mechanism involved by the above embodiment is applied to compounding machine as an example It is bright, but the pickup pressure adjustmenting mechanism can also be applied to other image processing systems.As long as have in image processing system Standby pickup pressure adjustmenting mechanism according to the present invention, just can realize following effect:It can be constructed and cheap with easy Cost and automatically adjust pickup pressure, the clockwise bad of pickup roller can be improved, prevent concentrated wear, ensureing anti-resend On the premise of function, it is bad to improve pickup abnormal sound, paperboard etc., and can prolong the service life.

Although preferred embodiments of the present invention have been disclosed for illustrative above, the present invention is not limited to these embodiments. In the range of the purport for not departing from the present invention, addition, omission, displacement and other changes of structure can be carried out.The present invention is simultaneously Foregoing explanation is not limited to, its protection domain is limited by the technical solution described in claims.

Claims (11)

1. a kind of pickup pressure adjustmenting mechanism, in its image processing system for being used to possessing main body frame,
The pickup pressure adjustmenting mechanism is characterized in that possessing:
Supporting member;
Pickup roller, it is arranged on pickup roll shaft, is rotated together with the pickup roll shaft, when the work of paper sheet delivery to the pickup roller When making region, which contacts with paper and carries out pickup;
Limiter of moment, it applies the pickup roller torque for pickup;
Engaging part, it is arranged at one end of the pickup roll shaft, is rotated together with the pickup roll shaft and pickup roller;
Link the arm of force, it is arranged at the supporting member, which can rotate by fulcrum of pivot, the linkage arm of force One end can engage with the engaging part;And
Force application part, it is adjusted pickup pressure by the engaging part and the fastening state of the linkage arm of force.
2. pickup pressure adjustmenting mechanism according to claim 1, it is characterised in that
In the case where the pickup roller is normally clockwise, the linkage arm of force is continuously flicked by the engaging part, and in the stranding Paper bowl it is clockwise it is undesirable in the case of, it is described linkage the arm of force intermittently flicked or it is described linkage the arm of force and the engaging part it is complete Full engaging.
3. pickup pressure adjustmenting mechanism according to claim 2, it is characterised in that
The force application part includes:
First force application part, its one end is arranged at one end that can be engaged with the engaging part of the linkage arm of force, another End is arranged at the supporting member;And
Second force application part, its one end are arranged at the main body frame, and what the other end was arranged at the linkage arm of force can not be with institute State one end of engaging part engaging.
4. pickup pressure adjustmenting mechanism according to claim 2, it is characterised in that
The force application part includes:
First force application part, its one end is arranged at one end that can not be engaged with the engaging part of the linkage arm of force, another End is arranged at the supporting member;And
Second force application part, its one end are arranged at the main body frame, and what the other end was arranged at the linkage arm of force can not be with institute State one end of engaging part engaging.
5. the pickup pressure adjustmenting mechanism according to claim 3 or 4, it is characterised in that
First force application part and second force application part are extension spring or compression spring.
6. the pickup pressure adjustmenting mechanism according to claim 3 or 4, it is characterised in that
Be both provided with the both ends of the pickup roll shaft engaging part, it is described linkage the arm of force, first force application part, with And second force application part.
7. pickup pressure adjustmenting mechanism according to any one of claims 1 to 4, it is characterised in that
The engaging part is ratchet.
8. pickup pressure adjustmenting mechanism according to any one of claims 1 to 4, it is characterised in that
The engaging part is cam, and one-way clutch is internally provided with the cam.
9. pickup pressure adjustmenting mechanism according to any one of claims 1 to 4, it is characterised in that
The limiter of moment is separately set with the pickup roller.
10. pickup pressure adjustmenting mechanism according to any one of claims 1 to 4, it is characterised in that
The limiter of moment is wholely set with the pickup roller.
11. a kind of image processing system, it is characterised in that possess:
Main body frame;
Pickup pressure adjustmenting mechanism according to any one of claims 1 to 10;And
Paper-feeding mechanism, it cooperates with the pickup pressure adjustmenting mechanism and ensures swimmingly to convey paper.
CN201510589135.0A 2015-09-16 2015-09-16 Pickup pressure adjustmenting mechanism and image processing system CN106542358B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510589135.0A CN106542358B (en) 2015-09-16 2015-09-16 Pickup pressure adjustmenting mechanism and image processing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510589135.0A CN106542358B (en) 2015-09-16 2015-09-16 Pickup pressure adjustmenting mechanism and image processing system

Publications (2)

Publication Number Publication Date
CN106542358A CN106542358A (en) 2017-03-29
CN106542358B true CN106542358B (en) 2018-05-08

Family

ID=58361429

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510589135.0A CN106542358B (en) 2015-09-16 2015-09-16 Pickup pressure adjustmenting mechanism and image processing system

Country Status (1)

Country Link
CN (1) CN106542358B (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08157084A (en) * 1994-12-06 1996-06-18 Toshiba Corp Paper feeder
CN100439221C (en) * 2006-09-04 2008-12-03 山东山大鸥玛软件有限公司 Control apparatus for paper feeding and separating
KR101850276B1 (en) * 2012-01-03 2018-04-19 에스프린팅솔루션 주식회사 Paper-feeding apparatus and image forming apparatus adopting the same
KR101940296B1 (en) * 2012-10-09 2019-01-21 에이치피프린팅코리아 유한회사 Paper-feeding apparatus and image forming apparatus adopting the same
US8979088B2 (en) * 2012-11-02 2015-03-17 Canon Kabushiki Kaisha Sheet feeding apparatus and image forming apparatus
CN104401766A (en) * 2014-11-20 2015-03-11 天津光电通信技术有限公司 Paper twisting mechanism for office equipment

Also Published As

Publication number Publication date
CN106542358A (en) 2017-03-29

Similar Documents

Publication Publication Date Title
US9315356B2 (en) Sheet processing apparatus having binding unit and image forming system thereof
US9254621B2 (en) Method for attaching crimping members, sheet binding device, and image forming apparatus
JP2017040925A (en) Image forming device
JP4035514B2 (en) Skew correction device, sheet feeding device including the same, image forming device, and image reading device
JP4216153B2 (en) Belt conveying apparatus and image forming apparatus using the same
US8328190B2 (en) Sheet feeding apparatus
JP5696565B2 (en) Sheet conveying apparatus and image forming apparatus
EP0409203B1 (en) Sheet feeding apparatus
US6260840B1 (en) Sheet feeding apparatus, image forming apparatus having the same and image reading apparatus having the same
JP5267219B2 (en) Deceleration device, rotating body driving device, image carrier driving device, and image forming apparatus
JP5090827B2 (en) Image forming apparatus
US9229410B2 (en) Sheet curl correction apparatus and image forming apparatus
US8740215B2 (en) Sheet conveying apparatus and image forming apparatus
JP4750754B2 (en) Sheet conveying apparatus and image forming apparatus
US8985578B2 (en) Sheet aligning device and image forming apparatus including the same
US6918583B2 (en) Sheet feeder
EP2803611B1 (en) Sheet processing apparatus and image forming system
US7463392B2 (en) Image reader and image forming apparatus
US8900088B2 (en) Clutch mechanism and image forming apparatus including same
JP4628854B2 (en) Image forming apparatus
US8613445B2 (en) Drive transmission device, sheet feeder, and image forming apparatus
KR20030067564A (en) Method and device for supplying sheets, and image forming apparatus having the device
US8267399B2 (en) Sheet processing apparatus and image forming apparatus including same
US8382107B2 (en) Sheet separating mechanism
CN100565363C (en) Image processing system and paper transport device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant