CN100526185C - Sheet separating/conveying mechanism and sheet conveying apparatus therewith - Google Patents
Sheet separating/conveying mechanism and sheet conveying apparatus therewith Download PDFInfo
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- CN100526185C CN100526185C CNB2006100818059A CN200610081805A CN100526185C CN 100526185 C CN100526185 C CN 100526185C CN B2006100818059 A CNB2006100818059 A CN B2006100818059A CN 200610081805 A CN200610081805 A CN 200610081805A CN 100526185 C CN100526185 C CN 100526185C
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Abstract
A sheet separating/conveying mechanism 30 has an upper unit 30 a in which a paper feed roller 31 and other components are arranged and a lower unit 30 b in which a separating roller 32, an arm member 36, and other components are arranged. The arm member 36 is U-shaped as seen in a plan view by being composed of a left and a right movable lever 36 a that are mutually parallel and that make contact with both ends of a center shaft 23 b and a pivot shaft 36 b that supports the movable levers 36 a so that they are rotatable in a direction indicated by arrow BB'. The movable levers 36 a have locking holes 39 formed at the tip ends thereof, and the lower ends of tension springs 38 are locked in those locking holes 39. The lower unit 30 b is fitted with an applied force adjusting member 45 on which locking portions 42 a and 42 b are formed to protrude therefrom leftward and rightward that permit adjustment of the positions at which the upper ends of the tension springs 38 are locked.
Description
Technical field
The present invention relates to a kind of sheet convey apparatus, it is used in such as in the imaging devices such as digital copier or laser printer, is used to carry the paper of copy paper or the paper of original copy.More particularly, the present invention relates to a kind of paper separation/conveying mechanism, it can be separated paper from stacks of sheets page by page, then paper is carried.
Background technology
Fig. 9 has represented the structure of conventional imaging equipment.In this imaging device (for example chopping machine) 1, in order to form image, be recharged unit 4 along the photoconductor drum 5 of clockwise direction rotation among the figure and apply electric charge equably, then, utilization is 7 that send from exposing unit (for example laser scan unit), form electrostatic latent image according to the laser beam of original image data at photoconductor drum 5, afterwards, utilize developing cell 8 that developer (hereinafter referred to as " toner ") is attached on the electrostatic latent image, to form toner image.
Toner is transported to developing cell 8 from toner container 9.View data is come from device transmission such as Personal Computer (not shown)s.In addition, be provided with electric charge clearing cell (not shown) in the downstream of cleaning unit 18, it is used to eliminate photoconductor drum 5 lip-deep residual charges.
Paper has formed in the process as described above of being transferred on it in process of photoconductor drum 5 of toner image, transported through paper transport path 11 and a pair of register roller 12 from sheet feed cassette 10, be transferred on the paper thereby can utilize transfer roll 13 (image transfer unit) will be formed on photoconductor drum 5 lip-deep toner image.Then, the paper that has been transferred toner image on it separates with photoconductor drum 5, is transported to the fixation unit 14 with a pair of fixing roller 14a then, herein toner image is carried out photographic fixing.Pass the top that fixation unit 14 paper process paper transport path 15 afterwards is transported to equipment, be sent in the paper delivery pallet 17 by a pair of exit roller 16 then.
Structure to sheet feed cassette is described below.Figure 10 is the side cutaway view of sheet feed cassette 10.Be placed in the basic shell 25 of sheet feed cassette 10 paper 26 by with predetermined pressure roof pressure to paper pick-up roller 29, this paper pick-up roller is arranged on the main body of equipment, described predetermined pressure is then laid plate 28 by paper and is applied, and this paper is laid plate and applied the application force that makes progress by spiral compression spring 27.When the duplicating start button of this imaging device was operated, paper pick-up roller 29 and feeding-in roll 31 were activated and rotate along the direction shown in the arrow among Fig. 9.
Generally, lay in the stacks of sheets 26 on the plate 28 being disposed in paper, one or more paper on its top is transported in the paper separation/conveying mechanism 30 by paper pick-up roller 29, and this mechanism has feeding-in roll 31 and separate roller 32.If have plurality of sheets of paper to open to be fed to the roll gap place between feeding-in roll 31 and the separate roller 32, then have only the separated roller 32 of paper of the top to separate, so that be transferred to paper transport path 11.Under this condition, the rotation of separate roller 32 is controlled by torque limiter (seeing Figure 12), thereby, separate roller 32 or remain on the stop position, or rotate with the direction identical with feeding-in roll 31.Be provided with and be used for neat paper 26 antemarginal lagging dege slide blocks 33, and it can be gone up at the throughput direction (left side/right) of paper move.
Figure 11 is the enlarged view to paper separation/conveying mechanism 30 among Figure 10, and Figure 12 is the front elevation of making along arrow C direction among Figure 11.Paper separation/conveying mechanism 30 arranged feeding-in roll 31 and some other parts in this unit, and this unit is that the paper that is transferred has formed the top guide body by following component set-up: upper unit 30a; And lower unit 30b, in this unit, being provided with separate roller 32, arm spare 36 and some other parts, this unit is that the paper that is transferred has formed the lower guide body.
On the pivot 36b of arm spare 36, be shaped on rollback protrusion 43.When sheet feed cassette 10 (see figure 10)s by along the direction (arrow D indication) vertical when pulling out with sheet transport direction, rollback protrusion 43 will be climbed up the step 44 on the equipment bottom surface, thereby arm spare 36 is rotated along arrow B ' direction.That is to say that when sheet feed cassette 10 was pulled out in by the slave unit main body, separate roller 32 left with feeding-in roll 31.Thereby, even there is paper to be sandwiched in the roll gap between feeding-in roll 31 and the separate roller 32, can prevent that also paper from breaking.
As patent document JP-A-2004-026479 is disclosed, for above-mentioned paper separation/conveying mechanism, even in order to ensure feed at the same time also must isolate sheet-fed under the situation of plurality of sheets of paper, to feeding-in roll 31, this predetermined pressure is for example applied by extension spring 38 force application apparatus such as grade the pressure that utilization is scheduled to separate roller 32 roof pressures.Under this condition, with separate roller 32 optimally roof pressure can change with the used paper thickness of reality and some other factor to the pressure on the feeding-in roll 31.Thereby, by way of example, if pressure is too high, feed plurality of sheets of paper simultaneously then, if pressure too a little less than, then can any paper of feed, above-mentioned any situation all can cause paper feed error.On the other hand, if the pressure of the left and right sides is unbalanced on separate roller 32 axial directions, conveyance of sheets or with other disadvantageous form paper feeding on the bias then.
Putting before this, people have proposed several different methods and have regulated separate roller etc. is separated the pressure of member roof pressure to the feeding-in roll.For example, patent document JP-A-2001-031275 discloses a kind of paper separation/conveying mechanism, it is provided with pressure-regulating device, this device is used to regulate jack unit (spring) with the pressure of separate roller roof pressure to the feeding-in roll, wherein, by utilizing instruments such as screwdriver to change the pressure of the adjustable in length of spring to separate roller.
But in structure shown in Figure 11, separate roller 32 slides on the direction vertical with sheet transport direction (arrow A A ' direction) linearly, and roof pressure the movable levers 36a of separate roller 32 and made circus movement around pivot 36b.That is to say, the direction of transfer of the pressure that is provided by movable levers 36a is not consistent with the direction of slip of separate roller 32, thereby the place, contact site between the contact site between central shaft 32b and the movable levers 36a and central shaft 32b and guiding groove 35 sidewalls can rub.This will hinder the application force that is applied by extension spring 38 successfully to transmit to separate roller 32.
On the other hand, patent document JP-A-H10-207141 relates to a kind of paper equipment for after-treatment, this equipment one by one is clipped in recording materials in the roll gap between two rollers, and carry, simultaneously the paper that curls being carried out " flattening " (pressing) handles, wherein two rollers remain in contact with one another, and this document discloses a kind of method, and it is by changing axle-wheelbase between two rollers step by step from the intensity of coming to regulate step by step flattening.
In addition, patent document JP-A-2002-302324 relates to a kind of original copy feed equipment, it is one by one carried paper by utilizing separate roller and separating belt, this document discloses a kind of method that is used for adjustment pressure, need not to change parts, but by regulating by means of regulating scale manipulation align member, align member wherein is used to regulate the distance between separate roller and the separating belt, regulates scale and is provided with by the sense of displacement along align member.But inconvenience is: for JP-A-H10-207141 and the disclosed method of JP-A-2002-302324, be difficult at first sight just identify the direction of regulating.This will cause the required time of the assembly working of equipment and work that service personnel readjusts exceedingly to be prolonged, and the adjusting that leads to errors.
In addition, as shown in figure 12, in the middle part of roll body 32a is not disposed in central shaft 32b and under the situation of taking back slightly, according to lever principle, need be by applying the application force stronger to the less left side of distance of central shaft 32b end, so that the stressed of the roll body 32a left and right sides reaches balanced than the right side to roll body 32a.On the other hand, be set at torque limiter 41 under the situation on roll body 32a right side, the center of gravity of separate roller 32 is not positioned at the position, intermediate portion, but slight right.This will be partial to the right side along with the displacement of center of gravity more with regard to the application force that needs applied.In this manner, must not only consider separate roller 32 layout, but also consider displacement, so that the regulating action application force of the left and right sides in the axial direction independently owing to the center of gravity of the setting of torque limiter 41.
But inconvenience is: for structure shown in Figure 12, owing to extension spring 38 is connected on the position of separate roller 32 axial centre portions, so can not regulate the stressed of the left and right sides independently.In passing, although description above at be arranged in the imaging device, as the sheet feed cassette in paper feed source, original copy load transfer device of automatic transport original copy page (ADF-automatic document feeder device) or the sheet supply apparatus that is used as interleaving paper feed source also can run into same problem.
Summary of the invention
Consider the problem that above-mentioned prior art runs into, an object of the present invention is to provide a kind of paper separation/conveying mechanism, it makes that the suffered roof pressure power of separation member such as separate roller can easily be regulated, and separating member is axially gone up the stressed of the left and right sides and can be regulated independently, the present invention also provides a kind of sheet convey apparatus, is provided with this paper separation/conveying mechanism in this equipment.Another object of the present invention is that a kind of paper separation/conveying mechanism is provided easily and cheaply, this mechanism can successfully transmit the application force of force application apparatus, thereby can carry out roof pressure to separation members such as separate rollers with pressure stable, the present invention also provides the sheet convey apparatus that is provided with this device separation/conveying mechanism.
To achieve these goals, according to an aspect of the present invention, provide a kind of paper separation/conveying mechanism, be provided with in this mechanism: feeding-in roll, it is used for along sheet transport direction feed paper; Separating member is being approximately perpendicular on the direction of sheet transport direction, and it is separated to the bottom of described feeding-in roll or with the bottom of feeding-in roll by roof pressure; And force application apparatus, it is used for the separating member roof pressure to described feeding-in roll, this paper separation/conveying mechanism is only carried out the paper that is positioned at the stacks of sheets the top and separated and conveying, and this mechanism is characterised in that: the application force that force application apparatus allows to be applied can be regulated independently in the axial both sides of described separating member.
Adopt this structure, can the left and right sides in the axial direction regulate independently the pressure of separating member roof pressure to the feeding-in roll.So just make that the stressing conditions of the separating member left and right sides can be more more balanced than prior art.Thereby, can reduce the situation of deflection paper feeding and improper paper feeding effectively.
According to the present invention, carrying out in the design-calculated paper separation/conveying mechanism according to above describing, force application apparatus comprises: two extension springs, they apply application force to the axial both sides of separating member; And the application force adjustment means, it each side is provided with a lock portion that is used to lock extension spring one end.Under this condition, respectively be shaped on many engaging grooves on two lock portion, on the stretch/shrink direction of extension spring, these engaging grooves are positioned at different positions.
Adopt such structure design,, just can easily regulate the application force that is applied by change the engage position of extension spring according to the displacement of separating member center of gravity, actual used paper thickness and other factors.
According to the present invention, carrying out in the design-calculated paper separation/conveying mechanism according to above describing, it is stepped appearance that engaging groove is made into along the upper limb of lock portion, and has connected flexible thin-plate element above lock portion, so that the open end of sealing engaging groove.Thin-plate element is retractable into the open position of opening of open end.
Adopt such structure design, what extension spring was deviate from from engaging groove when being transferred with regard to not appearing at paper may.On the other hand, during the application force that applies when readjusting, thin-plate element can be bent, so that the open open end of opening engaging groove, thereby can easily regulate the engage position of extension spring.
According to the present invention, carrying out in the design-calculated paper separation/conveying mechanism the same number of label symbol of made engaging groove on being provided with it for each lock portion on the application force adjustment means according to above describing.
Adopt such structure design, by marking the corresponding label symbol of initial setting with extension spring in advance, the work efficiency when equipment being assembled and readjusting with regard to improving, and can reduce adjusting error.
According to the present invention, to carry out in the design-calculated paper separation/conveying mechanism according to above describing, label symbol is configured to corresponding with the layout general layout of engaging groove.
Adopt such structure design, when equipment was assembled and readjusted, a glance just can be found out the adjusting position of extension spring.
According to the present invention, carrying out in the design-calculated paper separation/conveying mechanism according to above describing, separating member is a separate roller, it is made up of roll body made from elastomeric material and the central shaft that has run through the roll body center of turn.
Adopt such structure design, can regulate the stressed of the separate roller left and right sides independently, the separate roller roof pressure is realized equilibrium in the axial direction to the pressure on the feeding-in roll thereby make.
According to the present invention, carrying out in the design-calculated paper separation/conveying mechanism according to above describing, separate roller is provided with torque limiter, has only when propulsive effort surpasses predetermined amplitude, and it just allows roll body to rotate.
Adopt such structure design, by utilizing the rotation of torque limiter control separate roller, just can further improve the performance of separating paper, can reduce paper feed error thus, paper feed error wherein for example is feed plurality of sheets of paper or not paper feeding at all simultaneously.
According to the present invention, carrying out in the design-calculated paper separation/conveying mechanism according to above describing, in lock portion, consider roll body in its layout on axially and the position of separate roller center of gravity, with in the engaging groove mutually the corresponding engagement groove on some positions like this: make the application force that applies by extension spring act on equably on the left and right sides of roll body.
Adopt such structure design, by simply left and right sides extension spring being engaged with the engaging groove that is in correspondence position, just applied force balancedly can be acted on the left and right sides of roll body, no matter and where roll body is in for the center of gravity of which kind of layout or separate roller.
According to the present invention, carrying out in the design-calculated paper separation/conveying mechanism according to above describing, force application apparatus has movable lever, the one end is being supported rotationally, and its other end and extension spring link, and thus, the movable levers utilization contacts with separating member, the effort that will be applied by extension spring and is provided with at separating member and the contacted part of movable levers place and rotates the servo-actuated member to separating member.
Adopt such structure design, can reduce the friction that separating member and movable levers are in contact with one another the position.Thereby, can be smoothly with the separating member roof pressure to feeding-in roll and make it away from feeding-in roll.
According to the present invention, carrying out in the design-calculated paper separation/conveying mechanism according to above describing, separating member is a separate roller, and it is made up of roll body made from elastomeric material and the central shaft that has run through the roll body center of turn, rotates the place, two ends that the servo-actuated member is mounted to described central shaft.
Adopt such structure design, can reduce the friction at place, separate roller two ends.Thereby can apply application force to separate roller smoothly, and make the separate roller roof pressure is realized evenly in the axial direction to the application force on the feeding-in roll.
According to the present invention, carrying out in the design-calculated paper separation/conveying mechanism according to above describing, rotating the servo-actuated member is bearing.
Adopt such structure design, can more effectively reduce the friction between separating member and the movable link, and more smoothly with the separating member roof pressure to feeding-in roll and make it away from feeding-in roll.
According to a further aspect in the invention, provide a kind of sheet convey apparatus, it has according to above-mentioned design-calculated paper separation/conveying mechanism.
Adopt such design, can realize a kind of sheet convey apparatus easily and cheaply, in this equipment, the application force that imposes on separating member is realized equilibrium in the axial direction, thereby can with separating member smoothly roof pressure to feeding-in roll and make it away from feeding-in roll, and then reduced deflection paper feeding and improper paper feeding, so that easily regulate applying power.
Description of drawings
Front elevation among Fig. 1 has been represented the structure of the paper separation/conveying mechanism of first embodiment of the invention;
Fig. 2 is the block diagram of the lower unit in the paper separation/conveying mechanism of first embodiment, and this view is observed and drawn from application force adjustment means position;
Fig. 3 neutral body figure has represented to be used in the application force adjustment means in the paper separation/conveying mechanism of first embodiment;
Fig. 4 is the lock part enlarged view on every side of application force adjustment means;
Enlarged view among Fig. 5 has been represented the another kind structure around the lock part;
Lateral plan among Fig. 6 has been represented the structure of the paper separation/conveying mechanism of second embodiment of the invention;
Fig. 7 is the front elevation of the structure of the second embodiment paper separation/conveying mechanism;
Fig. 8 a and the lateral plan among Fig. 8 b represented the paper at second embodiment separate/conveying mechanism in, application force is how to be applied on the separate roller through movable levers;
Cutaway view among Fig. 9 has been represented the profile of common imaging device total structure;
Figure 10 is the side view cutaway drawing of the structure of common sheet feed cassette;
Figure 11 is a kind of lateral plan of plain paper separation/conveying mechanism; And
Figure 12 is the front elevation of this plain paper separation/conveying mechanism.
The specific embodiment
Hereinafter with reference to the accompanying drawings embodiments of the present invention are introduced.Front elevation among Fig. 1 has been represented the structure of the paper separation/conveying mechanism of first embodiment of the invention.Those parts that can find in existing example shown in Figure 12 are equally referred to identical label, and omit being repeated in this description them.In this embodiment, arm spare 36 is U-shaped in birds-eye view, and it is to be made of two mutual parallel movable levers 36a and pivot 36a, wherein, movable levers 36a contacts with the two ends of central shaft 32b, and pivot 36a then is connected to two movable lever 36a together.
The end of left and right sides movable levers 36a is shaped on lock hole 39, and the lower end of extension spring 38 is locked in these lock holes 39.The upper end of extension spring 38 is locked in respectively on the lock part 42a and 42b of application force adjustment means (hereinafter being described), and the application force adjustment means is assembled on the lower unit 30b (seeing Figure 11).
Adopt such structure design, can regulate independently in the left and right sides on the central shaft 32b direction the pressure of separate roller 32 roof pressures to the feeding-in roll 31.Thereby, to compare with the ordinary construction that applies application force by single extension spring 38, the application force that acts on the roll body 32a left and right sides can be more balanced.This will help to reduce deflection paper feeding and improper paper feeding.
Fig. 2 is the block diagram of lower unit 30b being done from the bottom of Fig. 1.The number designation 45 masterpieces adjustment means of exerting oneself, it can be regulated the application force that is applied by left and right sides extension spring 38.By screw application force adjustment means 45 is fixed on the lower unit 30b.At the two ends, the left and right sides of application force adjustment means 45, made the lock part 42a and the 42b of outside projection.Lock part 42a and 42b can regulate the latched position of extension spring 38.
Fig. 3 has represented the structure of application force adjustment means 45.Application force adjustment means 45 is the metal sheets with vertical surface 45a and horizontal surface 45b, and its cross-sectional plane is essentially L shaped. Lock part 42a and 42b are made into two ends, the left and right sides projection obliquely from vertical surface 45a.On horizontal surface 45b, be shaped on screw hole 46, application force adjustment means 45 can be fixed on the lower unit 30b (see figure 2) thus.
In addition, on vertical surface 45a, impressed some label symbols 47 (being as each seven of both sides) herein, the number of these label symbols is identical with the number that lock part 42a and 42b go up engaging groove (hereinafter describing).By marking in advance and the corresponding label symbol 47 in the initial adjustment position of extension spring 38, a glance just can be found out the adjusting position of extension spring 38 when mounting equipment.This will help to increase work efficiency, and reduce adjusting error.
Change according to the used paper thickness of reality by the extension spring 38 power-assisted preferred value of executing.When this equipment of assembling, the power that applies is set to and the corresponding preferred value of the thickness of normal paper.But under the situation of common used paper criteria of right and wrong paper, user or service personnel need readjust application force, to be adapted to these paper thickness.Even in this case, but also the mark position of reference marker symbol 47 make the mobile required amount of movement of extension spring 38 from the initial adjustment position.So just simplified the work of readjusting.
Fig. 4 is the enlarged view of lock part 42b peripheral part (part among the circle S shown in Figure 3).Be shaped on seven step-like engaging grooves 48 on the 42b of lock part, they are in different positions on the stretch/shrink direction of extension spring 38 (among the figure on/following direction).For example, as shown in Figure 4, under the 4th label symbol 47 (referring to Fig. 3) was labeled situation as the initial adjustment position, extension spring 38 was locked in from the 4th engaging groove 48 of inboard number.
The structure of lock part 42a is similarly, thereby it is not done independent description.But should be noted that: lock part 42a and 42b are asymmetric, but be designed to: even also make extension spring 38 be elongated to different length for a pair of engaging groove 48 that is in mutual correspondence position, that is to say, make them can apply different application forces.As shown in Figure 1, the roll body 32a of separate roller 32 is not disposed in the middle part of central shaft 32b, but takes back slightly.Thereby, reach balanced in order to make the application force that acts on the roll body 32a left and right sides, according to lever principle, must apply the application force bigger to the less left side of the distance between roll body 32a and the central shaft 32b end than the right side.
On the other hand, because torque limiter 41 is disposed in the right side of separate roller 32, so the center of gravity of separate roller 32 is not to be positioned at its axial midway location, and slight right.Thereby because the displacement of center of gravity, the application force that acts on the right side needs strong.Therefore, the position of the engaging groove 48 on lock part, left and right sides 42a and 42b is based on to be determined the consideration of separate roller 32 layouts and center of gravity displacement, and center of gravity displacement wherein is owing to the setting of torque limiter 41.Thereby when two extension springs 38 were locked in the mutual cooresponding pair of engaging groove 48 of lock part 42a and the last position of 42b, applied force can balancedly act on the left and right sides of roll body 32a.
As shown in Figure 4 engaging groove 48 is being made under the step-like situation, when sheet feed cassette 10 is withdrawn from and inserted, the swing of movable levers 36a will make extension spring 38 deviate from from engaging groove 48.As shown in Figure 5, in order to prevent such situation, above lock part 42a and 42b, connected flexible thin-plate element 50, wherein only utilize the fixed part 50a of thin-plate element 50 to connect, fixed part 50a is provided with lining cement, thereby the flexible portion 50b that is positioned at feather edge can be sealed the open end of engaging groove 48.Can prevent like this because the situation that the extension spring 38 that the swing of movable levers 36a causes is deviate from from engaging groove 48.In addition, when readjusting applied force, by flexible portion 50b being bent towards the surface of paper, just can the open open end of opening engaging groove 48, thus can easily regulate the engage position of extension spring 38.
Thin-plate element 50 can be made with any material, as long as can make the flexible thin layer as materials such as synthetic resin.But preferably: the intensity of thin plate is enough to keep the engagement state of extension spring 38.A kind of preferred embodiment of thin plate is the thin plate (composite panel) of polyethylene terephthalate (PET).
The shape of above specifically described application force adjustment means 45, lock part 42a and 42b and engaging groove 48 and layout only are exemplary, can change in case of necessity to be suitable for the particular requirement of paper separation/conveying mechanism 30.For example, lock part 42a and 42b can not be made into the projection shape, but engaging groove 48 is made along the left and right edges of vertical surface 45a.In the case, engaging groove 48 is made hook-type, thereby can prevent that also extension spring 38 from deviating from even thin-plate element 50 is not set.
Lateral plan among Fig. 6 has been represented the structure of the paper separation/conveying mechanism of second embodiment of the invention, and Fig. 7 is the front elevation of making along arrow C direction among Fig. 6.Those are at Figure 11 or represent that the parts that also occur among Fig. 1 of first embodiment are referred to identical number designation, and do not remake and be repeated in this description.In this embodiment, be equipped with bearing 40 on the two ends of separate roller 32 central shaft 32b.Separate roller 32 is made into to contact with movable levers 36a by bearing 40.In Fig. 7, omitted the extension spring 38 that is positioned at the right side.
Thereby, shown in Fig. 8 a, under the state that separate roller 32 and feeding-in roll 31 are separated, when arm spare 36 when the application force lower edge of extension spring 38 arrow B direction is rotated, movable levers 36a applies a roof pressure power to central shaft 32b, and the action direction of this roof pressure power is the arrow B direction.Under this condition, the bearing 40 that is sleeved on the central shaft 32b will rotate along the arrow C direction, thereby central shaft 32b is slided on the arrow A direction along engaging groove 35 (see figure 6)s.
On the other hand, shown in Fig. 8 b, separate roller 32 by the situation of roof pressure to the feeding-in roll 31 under, when arm spare 36 overcome extension spring 38 application force and when arrow B ' direction is rotated, bearing 40 rotates along arrow C ' direction, following along the movable levers 36a of arrow B ' direction rollback, thereby central shaft 32b will slide on arrow A ' direction.Therefore, on the contact site between the contact site between central shaft 32b and the movable levers 36a or central shaft 32b and the guiding groove 35, can not produce any friction.Thereby, utilizing movable levers 36a, separate roller 32 can slide smoothly along the direction of arrow A A ' indication.
In this embodiment, on central shaft 32b, assembled bearing 40, slided smoothly to allow separate roller 32.Also bearing 40 can be set, and the rotation servo-actuated member of assembling such as other types such as roller, so that they can freely rotate with respect to central shaft 32b.This rotation servo-actuated member can be made by metal, resin or any other material.
In others, can implement the present invention according to other any way except that specific descriptions scheme above, and in the scope of essential idea of the present invention, may have multiple remodeling and change form.For example, in the above-described embodiment, can not adopt substantially, but a pivot 36b is being set independently each side, thereby can support two movable lever 36a individually for the arm spare 36 of U-shaped applies roof pressure power to separate roller 32.Can not use extension spring 38, and use the spring member of other type, for example compression spring, torsion spring or laminated spring.
Above-mentioned embodiment at be such paper separation/conveying mechanism: it is by preventing separate roller 32 roof pressures to the feeding-in roll 31 situation of many paper supplies.But these structures are equally applicable to following paper separation/conveying mechanism: in this mechanism, be not separate roller 32, but the separating pad that will be made by elastomeric material or separating belt roof pressure are to feeding-in roll 31.
Above-mentioned embodiment at be such example: paper separation/conveying mechanism is set in the sheet feed cassette 10, and this sheet feed cassette is used as the paper paper feeding source in the imaging device.But this paper separation/conveying mechanism also can be used in the ADF of automatic transport original copy page and be used as in the paper feeding equipment in inset paper feeding source.
According to the present invention, independently regulating action separating member axially on the application force of the left and right sides.Thereby realized a kind of like this paper separation/conveying mechanism: it can reach left and right sides equilibrium with the separating member roof pressure than situation of the prior art to feeding-in roll the time more well, thereby can prevent deflection paper feeding and improper paper feeding effectively.
In addition, used the force application apparatus that comprises two extension springs and application force adjustment means, be shaped on the lock part on two positions about application force adjustment means wherein, each lock part all has a plurality of engaging grooves, extension spring is engaged in these engaging grooves, and on the stretch/shrink direction of spring, these engaging grooves are in different positions.Thereby, can easily regulate the application force of extension spring, with the displacement that is adapted to the separating member center of gravity, actual used paper thickness and other factor.
In addition, engaging groove is by being made stepped appearance along the upper limb of lock part, and above the lock part attached flexible thin-plate element, with the open end of sealing engaging groove.When paper is carried out when carrying, such design can prevent that extension spring from deviating from from engaging groove.When readjusting applied force, with the thin-plate element bending, so that it moves back to a certain position, on this position, thin-plate element opens wide the open end of engaging groove.So just can easily regulate the engage position of extension spring.
In addition, for each lock part, all be shaped on the application force adjustment means and the same number of label symbol of engaging groove.Thereby, by marking the corresponding label symbol in initial adjustment position with extension spring in advance, increase work efficiency in the time of just or readjusting equipment when assembling, and reduce adjusting error.In addition, corresponding by the layout that makes label symbol with the layout of engaging groove, just can be readily seen that the adjusting position of extension spring.
In addition, separating member has been made into separate roller, and it is made up of roll body and central shaft, and considers the roll body deployment scenarios and the displacement of separate roller center of gravity and make engaging groove on the lock part in the axial direction.Thereby, by simply extension spring being joined to the pair of engaging groove that is arranged on the correspondence position of the left and right sides, just can be balancedly to the left and right sides of the roll body application of force.
In addition, by movable levers under the situation of the separating member application of force, contact part office between separating member and movable levers is provided with rotates the servo-actuated member, owing to rotate the rotation of servo-actuated member, this will help to prevent that the contact position between movable levers and separating member from producing friction.Thereby, utilize the rotation of movable levers, affact application force on the separating member and changed into application force on the separating member direction of slip, therefore separating member can be slided smoothly.
In addition, by paper separation/conveying mechanism according to the present invention is arranged in the sheet convey apparatus of sheet feed cassette or original load transfer device etc., can realize a kind of like this sheet convey apparatus: in this equipment, the power that acts on the separating member is more balanced in the axial direction, reducing deflection paper feeding and improper paper feeding, and regulating action power easily.
Claims (14)
1. paper separation/conveying mechanism, it comprises:
Feeding-in roll, it is used for along the sheet transport direction conveyance of sheets;
Separating member is being approximately perpendicular on the direction of sheet transport direction, and it is separated to the bottom of described feeding-in roll or with the bottom of feeding-in roll by roof pressure;
Force application apparatus, it comprises: two extension springs, they apply application force to the axial both sides of described separating member; And application force adjustment means, each side be provided with a lock portion that is used to lock extension spring one end at it, respectively be shaped on many engaging grooves on the described lock portion, on the stretch/shrink direction of described extension spring, described many engaging grooves are positioned at different positions, described force application apparatus is used for described separating member roof pressure to described feeding-in roll, and the application force that described force application apparatus allows to be applied is regulated independently in the axial both sides of described separating member
It is characterized in that described paper separation/conveying mechanism is only carried out the paper that is positioned at the stacks of sheets the top and separated and conveying.
2. paper separation/conveying mechanism according to claim 1 is characterized in that,
It is stepped appearance that described engaging groove is made into along the upper limb of described lock portion, and above described lock portion, connected flexible thin-plate element, so that seal the open end of described engaging groove, described thin-plate element is retractable into the open position of opening of open end.
3. paper separation/conveying mechanism according to claim 1 is characterized in that,
On described application force adjustment means, in the described lock portion each all be provided with its on the same number of label symbol of made engaging groove.
4. paper separation/conveying mechanism according to claim 2 is characterized in that,
On described application force adjustment means, in the described lock portion each all be provided with its on the same number of label symbol of made engaging groove.
5. paper separation/conveying mechanism according to claim 3 is characterized in that,
Described label symbol is configured to corresponding with the layout general layout of described engaging groove.
6. paper separation/conveying mechanism according to claim 4 is characterized in that, described label symbol is configured to corresponding with the layout general layout of described engaging groove.
7. paper separation/conveying mechanism according to claim 1 is characterized in that,
Described separating member is a separate roller, and it is made up of roll body made from elastomeric material and the central shaft that has run through the roll body center of turn.
8. paper separation/conveying mechanism according to claim 7 is characterized in that,
Described separate roller is provided with torque limiter, has only and works as the propulsive effort that is applied when being better than predetermined amplitude, and it just allows described roll body to rotate.
9. paper separation/conveying mechanism according to claim 7 is characterized in that,
In described lock portion, consider described roll body in its layout on axially and the position of described separate roller center of gravity, with in the described engaging groove mutually the corresponding engagement groove on some positions like this: make the application force that applies by extension spring act on equably on the left and right sides of described roll body.
10. paper separation/conveying mechanism according to claim 8 is characterized in that,
In described lock portion, consider described roll body in its layout on axially and the position of described separate roller center of gravity, with in the described engaging groove mutually the corresponding engagement groove on some positions like this: make the application force that applies by extension spring act on equably on the left and right sides of described roll body.
11. paper separation/conveying mechanism according to claim 1 is characterized in that,
Described force application apparatus has movable lever, the one end is being supported rotationally, and its other end and described two extension springs link respectively, thus, described movable levers utilization contacts with described separating member, the effort that will be applied by described two extension springs and is provided with at described separating member and the contacted part of described movable levers place and rotates the servo-actuated member to described separating member.
12. paper separation/conveying mechanism according to claim 11 is characterized in that,
Described separating member is a separate roller, and it is made up of roll body made from elastomeric material and the central shaft that has run through the roll body center of turn, and described rotation servo-actuated member is mounted to the place, two ends of described central shaft.
13. paper separation/conveying mechanism according to claim 12 is characterized in that, described rotation servo-actuated member is a bearing.
14. a sheet convey apparatus, it comprises paper separation/conveying mechanism according to claim 1.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005141572 | 2005-05-13 | ||
| JP2005141572A JP4484762B2 (en) | 2005-05-13 | 2005-05-13 | Sheet separating / conveying mechanism and sheet conveying apparatus including the same |
| JP2005141592 | 2005-05-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1861504A CN1861504A (en) | 2006-11-15 |
| CN100526185C true CN100526185C (en) | 2009-08-12 |
Family
ID=37389050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100818059A Expired - Fee Related CN100526185C (en) | 2005-05-13 | 2006-05-12 | Sheet separating/conveying mechanism and sheet conveying apparatus therewith |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4484762B2 (en) |
| CN (1) | CN100526185C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6142889B2 (en) * | 2015-03-23 | 2017-06-07 | セイコーエプソン株式会社 | Image processing apparatus and sheet feeding structure |
| JP6845986B2 (en) * | 2016-08-10 | 2021-03-24 | セイコーエプソン株式会社 | Media transfer device and recording device |
| CN109658585B (en) * | 2017-10-11 | 2020-07-24 | 山东新北洋信息技术股份有限公司 | Paper kicking assembly, paper separating mechanism and paper money processing device |
| JP2020186068A (en) | 2019-05-10 | 2020-11-19 | キヤノン株式会社 | Sheet feeding device and image forming apparatus |
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|---|---|---|---|---|
| US6059280A (en) * | 1996-01-09 | 2000-05-09 | Canon Kabushiki Kaisha | Roller supporting device allowing easy replacement of separating roller |
| US6217017B1 (en) * | 1998-04-28 | 2001-04-17 | Oki Data Corporation | Paper-feeding apparatus and method of feeding paper |
| CN1072178C (en) * | 1995-10-20 | 2001-10-03 | 株式会社理光 | Paper feeder and imaging apparatus with said paper feeder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63194838U (en) * | 1987-06-05 | 1988-12-15 | ||
| JPH0466437A (en) * | 1990-07-05 | 1992-03-02 | Canon Inc | Paper feeding device |
| JPH1191971A (en) * | 1997-09-24 | 1999-04-06 | Konica Corp | Paper feeding device |
| JP3753527B2 (en) * | 1997-12-12 | 2006-03-08 | 株式会社リコー | Image forming apparatus |
| JP2000177874A (en) * | 1998-12-14 | 2000-06-27 | Canon Inc | Feeder and image forming device |
| JP2001039567A (en) * | 1999-08-02 | 2001-02-13 | Canon Inc | Sheet feeding device, picture image formation device furnished with this device and picture image reading device |
| JP3921894B2 (en) * | 1999-10-04 | 2007-05-30 | 村田機械株式会社 | Paper transport device |
-
2005
- 2005-05-13 JP JP2005141572A patent/JP4484762B2/en not_active Expired - Fee Related
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- 2006-05-12 CN CNB2006100818059A patent/CN100526185C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072178C (en) * | 1995-10-20 | 2001-10-03 | 株式会社理光 | Paper feeder and imaging apparatus with said paper feeder |
| US6059280A (en) * | 1996-01-09 | 2000-05-09 | Canon Kabushiki Kaisha | Roller supporting device allowing easy replacement of separating roller |
| US6217017B1 (en) * | 1998-04-28 | 2001-04-17 | Oki Data Corporation | Paper-feeding apparatus and method of feeding paper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1861504A (en) | 2006-11-15 |
| JP2006315827A (en) | 2006-11-24 |
| JP4484762B2 (en) | 2010-06-16 |
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