CN102211470A - Transportation apparatus - Google Patents
Transportation apparatus Download PDFInfo
- Publication number
- CN102211470A CN102211470A CN2010106233774A CN201010623377A CN102211470A CN 102211470 A CN102211470 A CN 102211470A CN 2010106233774 A CN2010106233774 A CN 2010106233774A CN 201010623377 A CN201010623377 A CN 201010623377A CN 102211470 A CN102211470 A CN 102211470A
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- China
- Prior art keywords
- roller
- paper
- arm
- rotation section
- transferred
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
- B41J13/02—Rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/02—Separating articles from piles using friction forces between articles and separator
- B65H3/06—Rollers or like rotary separators
- B65H3/0661—Rollers or like rotary separators for separating inclined-stacked articles with separator rollers above the stack
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/02—Separating articles from piles using friction forces between articles and separator
- B65H3/06—Rollers or like rotary separators
- B65H3/0684—Rollers or like rotary separators on moving support, e.g. pivoting, for bringing the roller or like rotary separator into contact with the pile
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2220/00—Function indicators
- B65H2220/09—Function indicators indicating that several of an entity are present
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2402/00—Constructional details of the handling apparatus
- B65H2402/30—Supports; Subassemblies; Mountings thereof
- B65H2402/31—Pivoting support means
Abstract
A transporting apparatus which is capable of restraining multi feed of transported media is provided. The transporting apparatus includes a first arm 31 mounted on a supporting shaft so as to be pivotable with respect to the supporting shaft about a first pivotal portion 61, a second arm 32 fixed with a feed roller 33 and mounted on the first arm 31 so as to be pivotable with respect to the first arm about the second pivotal portion 62, and a torsion coil spring 35 acting on the second pivotal portion 62 so as to urge the feed roller 33 toward the sheet (P1) in a just-before-transport state and a sheet transporting state.
Description
Technical field
The present invention for example relates to the conveying device that is used for ink-jet printer etc.
Background technology
In the past, be provided with in the printer and be used for separating the conveying device of sending one by one with the paper bundle on the loading tray of paper (being transferred medium) from mounting in printer.In this kind conveying device, use paper in order to make, by keeping and send roll-in to be connected to the state (for example, with reference to patent documentation 1) of using paper to sending roller to using the paper application of force with giving to sending roller to send reliably.
With reference to Fig. 9 the structure of existing conveying device is described.
Be provided with in the conveying device 100: be used for mounting with the loading tray 110 of paper Q, send roller 120 with paper Q to giving of carrying of the record portion of printer in loading tray 110 mounting.Should give and send roller 120 to be installed in via arm 130 on the driving shaft 140 as driving shaft.The rotation of this driving shaft 140 is delivered to sending roller 120 via not shown gear row, gives thus and send roller 120 rotations.In addition, conveying device 100 is equipped with is turned round helical spring 150, this turned round helical spring 150 with arm 130 towards with paper Q, be about to the counter clockwise direction application of force of arm 130 in figure.Thus, will be to sending roller 120 towards using paper Q crimping.In addition, by making to sending roller 120 along the rotation of the clockwise directions shown in the hollow arrow among the figure, with paper Q by sending shown in the arrow of ruling along single-point with the paper throughput direction.
In this kind conveying device 100, utilize the power of bestowing of being turned round helical spring 150, it is that rotate towards loading tray 110 at the center that arm 130 reaches to the minimizing of sending roller 120 along with the sheet number of using paper Q and with driving shaft 140.Thus, keep to send roller 120 according to the sheet number of paper Q to crimping with paper Q with the uppermost position in fig-ure of paper bundle.
Patent documentation 1: the spy opens the 2003-285936 communique
Yet, in this kind conveying device 100, utilizing the frictional force f of conveying roller 120 from being subjected to paper Q, arm 130 is towards using paper Q, the i.e. rotation of clockwise direction in figure.At this, shown in Fig. 9 (a), under with the many situations of the carrying capacity of paper Q, connect pivot and the axis LR that gives the pivot that send the roller 120 and acute angle that the mounting surface 111 of loading tray 110 is become that drives rotating shaft 140 diminish (hereinafter referred to as " acute angle X ").Thus, the arm 130 that makes that is formed by frictional force f diminishes towards the force component (fsinX) of the direction of rotating with paper Q.On the other hand, shown in Fig. 9 (b), under with the few situation of the carrying capacity of paper Q, above-mentioned acute angle becomes than acute angle X big (hereinafter referred to as " acute angle Y ").Thus, make the big (fsinX＜fsinY) of arm 130 this component when the force component (fsinY) of the direction of rotating with paper P becomes than acute angle X by what frictional force f formed.
Therefore, under with the few situation of the carrying capacity of paper Q, use paper Q to sending roller 120 to nip, thereby sent roller 120 and become excessive with the frictional resistance between the paper Q.Its result produces folded the sending of what is called that multi-disc is carried simultaneously with paper Q when carrying with paper Q.
Summary of the invention
The present invention puts in view of the above problems and proposes, and its purpose is to provide a kind of folded conveying device of sending that can suppress to be transferred medium.
In order to achieve the above object, the invention provides a kind of conveying device, it is characterized in that possessing: delivery device body, it utilizes to sending roller to carry and is transferred medium; The first arm, it is installed on described delivery device body, and can be that rotate with respect to described delivery device body at the center with first rotation section; Second arm, it is installed on described the first arm, and can be that rotate with respect to described the first arm at the center with second rotation section, and is fixed with described give and send roller becoming a side opposite with described first rotation section with respect to described second rotation section; The force section, it is to be sent roller to act on described second rotation section towards the described mode that is transferred the medium application of force with described.
According to this structure, giving when sending the roller rotation, give the component that send the frictional force of roller as second arm 32 is applied on second arm 32 towards the power of rotating for the direction of rotation of sending roller from being transferred medium and being subjected to.Utilize the effect of this power, second arm is so that to give the rotating shaft send roller be the center along rotating for the direction of rotation of sending roller, and the first arm is that rotate at the center with first rotation section, and thus, move towards being transferred medium second rotation section.Thus, axis that connect to give the pivot that send roller and second rotation section be transferred acute angle that medium becomes and follow the mobile of second rotation section and diminish.
In addition, utilize the above-mentioned of second rotation section to move, to the force section effect power opposite with the power of bestowing.And, utilizing the recuperability of force section, the force section applies power to second rotation section.Thus, bestow power so that give send roller from being transferred medium and being subjected to frictional force and sent roller will carry the mode of the dynamic balance that is transferred medium to increase.
Therefore, follow moving of second rotation section, the power of bestowing of second force section increases, but acute angle diminishes, and therefore is applied to degree to the increase of sending the frictional force on the roller with respect to being transferred medium, and this frictional force diminishes the increase degree to the power of sending roller to nip.Its result can suppress to become excessive to the frictional force of sending roller and be transferred between the medium with respect to two stacked frictional force that are transferred between the medium, therefore can suppress the folded of medium and send.
In conveying device of the present invention, described conveying device also possesses separating mechanism, this separating mechanism will send first of roller butt to be transferred medium from first being transferred second of medium adjacency and being transferred medium and separating with this on stacked direction with described give, when being used to of being produced by described separating mechanism separates described first and be transferred medium and described second and be transferred the load of medium when big, described second arm overcomes the power of bestowing of described force section and acts on described first direction that is transferred medium for the revolving force send roller to move towards described, and described thus giving send roller to increase with respect to described first power of bestowing that is transferred medium.
According to this structure, be transferred medium and second and be transferred the load of medium when big when being used to separate first, give and send roller to increase with respect to first power of bestowing that is transferred medium, bestow power according to above-mentioned load adjustment thus.That is,, under the state of the increase that has relatively reduced the power of bestowing, carry first to be transferred medium when relative hour of above-mentioned load.On the other hand, when above-mentioned load is big relatively, under the state of the increase that has relatively increased the power of bestowing, carry first to be transferred medium.Thus,, the suitable power of bestowing can be put on, therefore, can suppress to carry simultaneously first to be transferred medium and second what is called that is transferred medium and to be transferred the folded of medium and to send to sending roller with respect to above-mentioned load.
In conveying device of the present invention, first axle base of described first rotation section and described second rotation section is less than described second rotation section and described second axle base of giving the rotating shaft that send roller.
According to this structure, by making first axle base, to compare with the situation that first axle base is bigger than second axle base less than second axle base, the distance that rotate second rotation section becomes big.Thus, can strengthen the scope that to adjust to the power of sending roller to put on to be transferred medium the force section.
In conveying device of the present invention, when being changed to the described revolving force that send roller given to described when being transferred the state that medium transmits from the described rotation halted state send roller of giving, described second rotation section is so that connect the described axis of giving the rotating shaft that send roller and described second rotation section and be transferred acute angle that medium constitutes and become minimum mode and rotate.
According to this structure, when from being changed to the revolving force that send roller when being transferred the state that medium transmits for the rotation halted state send roller, it is maximum that two stacked frictional force that are transferred between the medium become, and therefore, makes second arm become maximum to the power of giving the direction of rotation rotation of sending roller.Utilize this power, rotate so that connect the axis of giving the rotating shaft that send roller and second turning cylinder and be transferred the acute angle that medium constitutes and become minimum second rotation section.In this case, sent the rotation halted state of roller to compare with giving, to send roller to reduce to direction that is transferred the power that medium applies and the obtuse angle that throughput direction constituted that is transferred medium by will giving of producing of force section.Thus, can suppress because giving of producing of the power of bestowing of force section sent the increase of the frictional force of roller from being transferred medium and being subjected to.Therefore, can suppress to be transferred medium to sending roller to nip.
In conveying device of the present invention, sent the opposed position of roller to be provided with the described mounting surface that is transferred medium of mounting in this conveying device with described give, be provided with cover in described first rotation section with the described opposed position of medium that is transferred, this cover is from described first rotation section of rotation outer side covers radially of described first rotation section, and the described mounting sheet number that is transferred medium is limited in the gap that utilizes this cover and described mounting surface to constitute, and described cover is arranged on described the first arm along with carrying the described described scope of sending the action of roller and rotating of giving that is transferred medium.
When second rotation section is provided with the mechanism that limits the mounting sheet number that is transferred medium, be transferred under the situation of medium to sending roller to carry, second rotation section is followed the rotation of the first arm and second arm and is that rotate at the center with first rotation section, and therefore, second rotation section is with respect to the change in location of mounting surface.Its result, restriction is transferred the change in location of the mounting sheet number of medium.Thus, can not clearly limit be transferred medium in fact can mounting to which kind of degree.
About this point, in the present invention, because cover from rotation outer side covers first rotation section radially of first rotation section, when therefore rotate first rotation section, covers the invariant positionization with respect to mounting surface.Therefore, send roller to carry the situation that is transferred medium for giving, the position of mounting surface and cover can not change.Thus, can clearly limit the mounting sheet number that is transferred medium.
In addition, because cover is arranged on the scope that the first arm rotates, therefore can suppresses to be transferred medium break away from from the gap between mounting surface and the cover midway in the rotation of the first arm.
Description of drawings
Fig. 1 is the approximate three-dimensional map of the printer of embodiment.
Fig. 2 is the approximate three-dimensional map of the conveying device of embodiment.
Fig. 3 is the exploded perspective view of picking up the unit of embodiment.
Fig. 4 is the schematic diagram that the gear row of unit are picked up in expression.
Fig. 5 (a) is the side view of the conveying device of expression holding state, and Fig. 5 (b) is the schematic diagram of the conveying device of presentation graphs 5 (a).
Fig. 6 (a) is the side view of the conveying device of state before expression will be carried, and Fig. 6 (b) is the schematic diagram of the conveying device of presentation graphs 6 (a).
Fig. 7 (a) is the side view of expression with the conveying device of paper feed status, and Fig. 7 (b) is the schematic diagram of the conveying device of presentation graphs 7 (a).
Fig. 8 (a) is the side view of the conveying device of state before expression will carry when having used ground paper, and Fig. 8 (b) is the schematic diagram of the conveying device of presentation graphs 8 (a).
Fig. 9 (a) is the existing schematic diagram with the conveying device under the many states of paper carrying capacity of expression, and Fig. 9 (b) is the existing schematic diagram with the conveying device under the few state of paper carrying capacity of expression.
Symbol description
11... printer, 12... conveying device, 23... bolster (delivery device body), 26... release liner (separating mechanism), 31... the first arm, 32... second arm, send roller 33... give, 35... turned round helical spring (force section), 42... top cover portion (cover), 61... first rotation section, 62... second rotation section, D1... first axle base, D2... second axle base, B... inclination angle (axis that connect to give the rotating shaft that send roller and second rotation section be transferred the acute angle that medium becomes), P, P3... is with paper (being transferred medium), P1 (first is transferred medium), P2... (second is transferred medium).
The specific embodiment
Below, with reference to Fig. 1～Fig. 8, to the specific embodiment of conveying device of the present invention as the employed conveying device of ink-jet printer (hereinafter referred to as " printer ") described.In addition, in the following description, short of special explanation, the situation of using " fore-and-aft direction ", " above-below direction " to reach " left and right directions " refers to that " fore-and-aft direction " shown in the arrow, " above-below direction " reach " left and right directions " among Fig. 1.In addition, in the present embodiment, above-below direction is defined as the direction identical with vertical direction.
As shown in Figure 1, printer 11 be supply with as side from behind be transferred medium with paper on the tape deck of shorthand or image etc.This printer 11 possesses: carry automatic sheet material conveyor (ASF:Auto Sheet Feeder) with paper be conveying device 12, carry by conveying device 12 with paper on document image etc. tape deck 13, discharge the ejection port 14 that has write down the usefulness paper of image etc. by tape deck 13.
As shown in Figure 2, conveying device 12 is provided with and is used for the loading tray 21 of mounting with paper.This loading tray 21 has: mounting is bearing-surface 21b with the skewed mounting surface 21a of paper, along the plane of fore-and-aft direction and left and right directions.Right-hand member at loading tray 21 is provided with guiding wall 22, and this guiding wall 22 is fixed in this loading tray 21 and uses the location of paper.Bolster 23 as delivery device body is installed on the guiding wall 22, and this bolster 23 extends towards left from this guiding wall 22, and is connected with not shown electro-motor via the gear row.Have and to pick up unit 24 with paper towards what tape deck 13 (with reference to Fig. 1) was carried at these bolster 23 upper supports.
In addition, on mounting surface 21a, be provided with and roller 25 (with reference to Fig. 5) with the paper butt, and with paper and this mounting surface 21a butt.Bearing-surface 21b is provided with the release liner 26 as separating mechanism, and this release liner 26 is used for separating one by one uses paper.Casing 26a that release liner 26 is provided with the rectangular box shape that is installed on bearing-surface 21b and the 26b of the portion that separates that extends along the fore-and-aft direction of casing 26a at the central portion of the left and right directions of this casing 26a.The 26b of this separation portion uses the coefficient of friction parts higher than casing 26a.
As shown in Figure 3, picking up unit 24 comprises: roller 33 is sent in giving of the lower end that be installed on bolster 23 and the first arm 31 that can rotate, the lower end that is installed on the first arm 31 and second arm 32 that can rotate, is installed on second arm 32.On this second arm 32, be equipped with and turned round helical spring 35 as the force section.Thus, will be to sending roller 33 (second arm 32) towards using the paper P application of force.In addition, sent roller 33 to transmit the revolving force of bolster 23 via the transmission mechanism 34 that constitutes by driven gear 34a～34c.
The first arm 31 comprises: a pair of first wrist 41 that leaves on the left and right directions, interconnect above-mentioned first wrist 41 and cover the top cover portion 42 of bolster 23 from the top.In each first wrist 41, position above it is provided with clutch shaft bearing portion 43, and this clutch shaft bearing portion 43 has the through hole that connects this wrist 41 on left and right directions.Position below first wrist 41 on right side is provided with from this wrist 41 towards right-hand outstanding the first axle part 44.Position below first wrist 41 in left side is provided with the second bearing portion 45, and this second bearing portion 45 has the through hole that connects this wrist 41 on left and right directions.Bolster 23 can be slidably inserted into clutch shaft bearing portion 43.In the present embodiment, utilize bolster 23 and clutch shaft bearing portion 43 to constitute " first rotation section 61 ".
The turned round helical spring 35 coaxial with second rotation section 62 is embedded in jut 53.An end of being turned round helical spring 35 is installed on the fastening portion 56 that is arranged on second wrist 51.In addition, the other end of being turned round helical spring 35 is installed in top cover portion 42.
Give that to send roller 33 to be provided with chimeric and form the roller main part 33a of drum with the 3rd bearing portion 55.Outer peripheral face at this roller main part 33a is equipped with sliding contact parts 33b, this sliding contact parts 33b with paper butt and be the rubber components of drum.Left end at roller main part 33a is provided with and the driven gear 34c meshed gears 33c of portion (with reference to Fig. 4).
As shown in Figure 4, transmission mechanism 34 is made of driven gear 34a～34c.Driven gear 34a is mounted to bolster 23 one and rotates.Driven gear 34b and driven gear 34a, 34c both sides' engagement.Driven gear 34c and gear part 33c engagement.Also have, shown in the hollow arrow among the figure,, then driven gear 34b is turned clockwise and driven gear 34c is rotated counterclockwise owing to the rotation of driven gear 34a if driven gear 34a follows being rotated counterclockwise of bolster 23 and is rotated counterclockwise.Also have, sent roller 33 owing to the rotation of driven gear 34c turns clockwise.
Then, describe to carrying for the mounting with paper P of being undertaken with reference to Fig. 5～Fig. 8 by conveying device 12.And each figure (b) represents to act on the power of picking up unit 24 peripheries and the schematic diagram of picking up the relation of angle that unit 24 is respectively.In Fig. 5～Fig. 7, with paper P use paper thick relatively thin and soft be " common paper " with paper.
Before will being positioned in loading tray 21, picking up unit 24 and be configured to sending roller 33 and mounting surface 21a butt with paper P.At this, picking up unit 24, to form the first axle base D1 littler than the second axle base D2, the described first axle base D1 is the length of the straight line of the center of rotation of the center of rotation that connects first rotation section 61 and second rotation section 62, and the described second axle base D2 is center of rotation that connects second rotation section 62 and the length of giving the straight line of the rotating shaft J that send roller 33.
As shown in Figure 5, will be with paper P mounting during, will be positioned in than giving with paper P and send the upstream side of roller 33, and, use paper P and sent roller 33 butts by using paper P to move towards the downstream by throughput direction in loading tray 21.Therefore, the component along mounting surface 21a with the deadweight of paper P acts on to sending roller 33.Thus, shown in the dotted line among the figure, the first arm 31 and second arm 32 of picking up unit 24 are center unitary rotation along clockwise direction with first rotation section 61.That is, second arm 32 is kept the inclination angle with respect to the first arm 31, is that rotate at the center with first rotation section 61 simultaneously.In addition, give and to be sent roller 33 to leave with respect to mounting surface 21a, and with paper P by to the gap of sending between roller 33 and the mounting surface 21a.Thus, with paper P and release liner 26 butts and give and send roller 33 and the top butt with paper P.
Shown in the solid line of Fig. 5, with paper P mounting in the state of loading tray 21 and give under the holding state that the rotation of sending roller 33 stops, pick up unit 24 and maintain following state: utilize and turned round helical spring 35, make the first arm 31 along with towards the below and forwards tilting, and make second arm 32 along with towards the below and tilted rearward.
Yet, under with the few situation of the sheet number of paper P,, pick up the state of picking up unit 24 of the state variation of picking up unit 24 of the dotted line of unit 24 from Fig. 5 to solid line by picking up the deadweight of unit 24.That is, in picking up unit 24, the first arm 31 is the center with first rotation section 61, and the lower end of the first arm 31 is towards rotating with paper P (counter clockwise direction among the figure).Follow in this, second arm 32 is kept the inclination angle with respect to the first arm 31, and promptly the first arm 31 and second arm 32 are integratedly towards rotating with paper P.
In addition, under holding state, turned round helical spring 35 and become natural length.Therefore, being turned round helical spring 35 does not produce the power of second arm 32 to the counter clockwise direction application of force.That is, do not produce on second arm 32 by what turned round that helical spring 35 forms and will be transferred the power with the paper P1 application of force (hereinafter referred to as " bestowing power S ") of medium to the conduct first of sending roller 33 in paper P, to be positioned at uppermost position in fig-ure.Therefore, give and to send roller 33 only to be and with the state of paper P1 butt.In addition, owing to give the trend of sending roller 33 not have rotation, therefore putting on to the frictional force of sending roller 33 with paper P1 is that roller frictional force f is " 0 ".
At this, the first arm 31 during with holding state and second arm, 32 angulation arm angle A are as reference angle A1.And, connection second rotation section 62 during with holding state and the straight line JL that gives the rotating shaft J send roller 33 and mounting surface 21a, with paper P1 with to being sent the acute angle inclination angle B that bearing surface became of roller 33 butts as reference angle B1.
As shown in Figure 6, giving the revolving force that send roller 33 to the state that transmits with paper P, promptly will utilize to the rotation of sending roller 33 and carry with under the state before the paper P1 (state before will carrying), with paper P1 and as be transferred with second of this usefulness paper P1 butt on the stacked direction medium with paper P2 between produce with paper between frictional force F become maximum (below, be called " frictional force F1 between usefulness paper ").In addition, to be used for to be that separating load H becomes maximum (hereinafter referred to as " separating load H1 ") from the load that separates with paper P2 with paper P1 to release liner 26.Therefore thus, use paper P1, need be equivalent to the power of making a concerted effort, become maximum (hereinafter referred to as " carrying capacity T1 ") by the conveying of producing for the rotation of sending roller 33 with the power T of paper P1 with frictional force F1 between paper and separating load H1 in order to carry.In addition, because roller frictional force f is equivalent to the counter-force of carrying capacity T1, therefore before will carrying, become identical under the state with carrying capacity T1 size.
At this moment, in picking up unit 24, apply the power that this arm 32 is clockwise rotated owing to roller frictional force f and to second arm 32.Thus, the lower end of the first arm 31 is that the center rotates counterclockwise and to send the rotating shaft J of roller 33 be that the center clockwise rotates to give the upper end of second arm 32 with first rotation section 61.Its result, second rotation section 62 is towards moving with paper P.Utilize moving of this kind second rotation section 62, arm angle A becomes the angle A 2 bigger than reference angle A1 (A1＜A2), and inclination angle B becomes the angle B 2 littler than reference angle B1 (B2＜B1).Follow the variation of above-mentioned arm angle A and inclination angle B, compare, give and to send roller 33 to move to downstream with the throughput direction of paper P with holding state.Thus, be applied with imagination when bestowing power S1 under the holding state with supposition and bestow power SK and compare, bestow power S1 towards the downstream of the throughput direction application of force.
On the other hand, follow the rotation of second rotation section 62, turned round helical spring 35 to crooked in the opposite direction with application of force side.Follow in this, the recuperability R1 that is turned round helical spring 35 is applied on second arm 32.Promptly suitable with the above-mentioned recuperability R1 power S1 that bestows is applied on second arm 32.Thus, along with arm angle A increases from reference angle A1, turned round the opposition side bending of helical spring 35 to application of force direction, the recuperability R1 that is therefore turned round helical spring 35 increases.
At this, because inclination angle B is an angle B 2, by roller frictional force f formed will to send roller 33 when the power of nipping with paper P1 (fsinB2) is similarly produced by roller frictional force f during less than the reference angle B1 of supposition at holding state to being sent roller 33 to the power of nipping (fsinB1), i.e. fsinB2＜fsinB1 with paper P1.
As shown in Figure 7, under with respect to the state of carrying with paper P2 with paper P1 (use the paper feed status), with paper P1 and with the frictional force F2 between the paper P2 become than Fig. 5 (b) will carry state before the time the little (F2＜F1) of frictional force F1.In addition and since with paper P1 with separate with paper P2, so separating load H is " 0 ".Thus, in order to keep feed status with paper P1, power that need be suitable with frictional force F2, the carrying capacity T2 during therefore with the paper feed status becomes than the little (T2＜T1) of carrying capacity T1.Thereby roller frictional force f is suitable with carrying capacity T2, thereby becomes than little during state before will carrying.
At this moment, in picking up unit 24, follow the minimizing of roller frictional force f, deasil rotate the lower end of the first arm 31, and rotate widdershins the upper end of second arm 32.Thus, second rotation section 62 is towards a side shifting of leaving with paper P.Its result, arm angle A become angle A 3 between angle A 1 and the angle A 2 (A2＜A3＜A1).And inclination angle B becomes angle B 3 between angle B 1 and the angle B 2 (B1＜B3＜B2).Follow the variation of above-mentioned arm angle A and inclination angle B, give send roller 33 and will carry before state compare upstream side and compare side shifting downstream with holding state.
In addition, follow moving of second rotation section 62, turned round helical spring 35 to the direction bending identical with application of force direction, therefore the recuperability R2 of this moment becomes than the little (R2＜R1) of recuperability R1.Thus, bestowing power S2 becomes than bestowing the little (S2＜S1) of power S1.
So, in picking up unit 24, along with from holding state to changing with the paper feed status, roller frictional force f, carrying capacity T, bestow power S and inclination angle B changes respectively.That is,, bestow power S and increase, but inclination angle B reduces along with carrying capacity T (roller frictional force f) increases.
But, promptly use the thickness difference of paper P, roller frictional force f, bestow power S, carrying capacity T and inclination angle B also changes respectively.That is, under with the different situation of the thickness of paper P, because separating load H variation, so roller frictional force f changes.Specifically, for separating load H as shown in Figure 8, under the thick situation with paper P3 of thickness as " photographic paper " or " postcard ", with comparing with paper P1 of as shown in Figure 6 the such thin thickness of common paper, separating load H becomes greatly.Follow in this, when carrying with paper P3 before will carrying under the state, compare with the situation of paper P1 with conveying, it is big that roller frictional force f becomes.Thus, carry the carrying capacity T3 with paper P3 to become bigger than carrying capacity T1, therefore the reference angle B1 when carrying with paper P1 compares, the angle B 4 of conveying during with the paper P3 (B4＜B1) that diminishes.
According to above-mentioned embodiment, can realize following effect.
(1) picks up that unit 24 has first rotation section 61 and second rotation section 62 and on second rotation section 62, install and turned round helical spring 35 what second arm 32 applied the power of bestowing.Thus, state and before will carrying with under the paper feed status, the component of roller frictional force f is applied on second arm 32 as the power that second arm 32 is clockwise rotated.Utilize the effect of this power, the first arm 31 with first rotation section 61 be the center rotate widdershins and second arm 32 to send the rotating shaft J of roller 33 be that deasil rotate at the center to give, therefore second rotation section 62 is towards moving with paper P.Thus, compare with holding state, inclination angle B follows above-mentioned the moving of second rotation section 62 and diminishes.
In addition, utilize moving of second rotation section 62 and make and turned round helical spring 35 and produce recuperabilities, and utilize the recuperability of being turned round helical spring 35, turned round 35 pairs second arms 32 of helical spring and apply towards the power of bestowing with paper P direction.This is bestowed power and increases pro rata with the increase of being turned round the recuperability of helical spring 35.
Therefore, turned round the power of bestowing that 35 pairs second arms 32 of helical spring apply and increase, but inclination angle B diminishes, so the degree of the increase of roller frictional force f is littler than the degree of the increase of the above-mentioned power of bestowing.Its result can suppress roller frictional force f with respect to becoming excessive with frictional force F between paper, therefore can suppress to send with the folded of paper P.
Yet, follow the miniaturization of printer, conveying device is also improving for the requirement of miniaturization.At this requirement, consideration will be picked up the unit miniaturization.That is, consider to realize miniaturization by the length that shortens arm 130 as shown in Figure 9.But when shortening the length of arm 130, it is bigger than acute angle Y shown in Figure 9 that acute angle Y becomes, and therefore encourages and sent roller 120 to nipping with paper Q.Therefore, nip in order to suppress above-mentioned, need reduce above-mentioned acute angle, therefore need extension arm 130, promptly the position configuration of driving shaft 140 is above more.But, in this case, the problem that exists conveying device to maximize.
About this point, in the present embodiment, by second arm 32 is tilted with respect to the first arm 31, do not change the position of bolster 23, and the rotation that utilizes second rotation section 62 makes the inclination angle B that is equivalent to above-mentioned acute angle reduce along with the increase of roller frictional force f, therefore can suppress above-mentioned generation of nipping.Therefore, can realize miniaturization and above-mentioned this two aspects effect of nipping of inhibition of conveying device 12 simultaneously.
Especially in conveying device shown in Figure 9 100, acute angle (inclination angle B) changes according to the carrying capacity with paper Q, sets for and it doesn't matter with the separating load of paper Q or with frictional force between paper.Thus, when after a little while with the carrying capacity of paper Q, though separating load or do not change with frictional force between paper, with paper Q to frictional force (roller frictional force) increase of sending roller 120 to apply.
About this point, in the present embodiment,, therefore can suppress by making that roller frictional force f produces to sending roller 33 to become excessive to the power of nipping (fsinB) with paper P1 according to inclination angle B being changed by separating load H and with the carrying capacity T that frictional force F between paper constitutes.
(2) according to the kind with paper, even identical sheet number, the size of separating load H is also different.For example, in common paper and the postcard, the paper of the paper thickness rate common paper of postcard is thick, so separating load H uprises.To this, in conveying device 100 as shown in Figure 9, can be according to adjusting to the position of sending roller 120 with scraps of paper number, but can not be according to changing with the paper kind to giving roller 120 to the crimp force that connects with letterweight.Therefore, in conveying device 100, for example the separating load H with postcard is set under the situation of benchmark, when common paper with scraps of paper number after a little while, the situation that exists common quires to send.On the other hand, the separating load H of common paper is set under the situation of benchmark, when ground paper with scraps of paper number after a little while, give the carrying capacity T deficiency of sending roller 33, have the situation of idle running.
About this point, in the present embodiment, pick up unit 24 and increase according to the increase of separating load H and bestow power S, therefore when with paper P be paper such as postcard thick use paper the time, increase is to the carrying capacity T that send roller 33.On the other hand, pick up unit 24 and reduce according to the minimizing of separating load H and bestow power S, therefore when with paper P be paper thickness such as common paper use paper the time, carrying capacity T minimizing.Thus, even, also can suppress to sending roller 33 folded sending with paper P or to sending roller 33 idle running owing to causing under the different situation of separating load H with the thickness of paper P is different.
(3) by making the first axle base D1 littler than the second axle base D2, then to compare with first axle base situation bigger than second axle base, the distance that rotate second rotation section 62 becomes big.Thus, can increase and utilize the recuperability turned round helical spring 35 to adjust scope to the power of sending 33 pairs on roller to apply with paper P1.
(4) before will carrying, under the state, become maximum respectively, so carrying capacity T becomes maximum with frictional force F between paper and separating load H.To this, owing to making inclination angle B, 62 rotations of second rotation section become minimum, therefore can suppress the increase of roller frictional force f.Therefore, can suppress to use paper P1 to sending roller 33 to nip.
(5) when second rotation section 62 is provided with the mechanism that limits the mounting sheet number of using paper P, under to the situation of sending roller 33 to carry with paper P, second rotation section 62 follow the first arm 31 and second arm 32 rotation and to moving with paper P, perhaps to a side shifting of leaving with paper P, therefore second rotation section 62 changes with respect to the position of mounting surface 21a.Its result, the restriction change in location of the mounting sheet number of paper P.Thus, can not clearly limit with paper P in fact can mounting arrive which kind of degree.
About this point, among the present invention, because the bend 42a of top cover portion 42 is from rotation outer side covers first rotation section 61 radially of first rotation section 61, when therefore rotated first rotation section 61, bend 42a can not change with respect to the position of mounting surface 21a yet.Therefore, for giving the situation of sending roller 33 to carry with paper P, the position of mounting surface 21a and bend 42a can not change yet.Thus, can clearly limit the maximum carrying capacity (mounting sheet number) of using paper P.
In addition, therefore the bend 42a of cover portion 42 above the scope that the first arm 31 rotates is provided with suppresses to break away from from mounting surface 21a and the formed clearance G of bend 42a in the rotation of the first arm 31 with paper P midway.
(6) follow the increase of bestowing power S, give and to send roller 33 to move, give thus and send the distance of roller 33 and release liner 26 to shorten to downstream with the throughput direction of paper P.Thus, therefore the relative grow of tenacity with paper P with the front end of paper P during with release liner 26 butts helps separation paper P.
Therefore in addition, follow the increase of bestowing power S, bestow power S towards the downstream, with respect to the degree of the increase of bestowing power S, the degree towards the increase of the component of upstream side of bestowing power S diminishes.Thus, with respect to the degree of the increase of bestowing power S, the degree of the increase of roller frictional force f diminishes.Therefore, can suppress to use paper P1 to sending roller 33 to nip.
(7) before as Fig. 6 or shown in Figure 9 will the conveying under the state, second rotation section 62 is limited in rotational action the position of leaving with paper P1, P3.Thus, even second rotation section 62 towards rotating with paper P1, P3, also can be avoided and use paper P1, P3 butt, therefore can utilize conveying device 12 to carry aptly with paper P1, P3.
In addition, above-mentioned embodiment also can followingly change.
In the above-described embodiment, also can make the first axle base D1 between first rotation section 61 and second rotation section 62 form with second rotation section 62 and give the second axle base D2 between the rotating shaft J that send roller 33 identical or more than.
In the above-described embodiment, also can omit release liner 26.
In the above-described embodiment, the bend 42a of top cover portion 42 also can be arranged on the scope littler than the slewing area of first rotation section 61.In addition, also can omit bend 42a.
In the above-described embodiment, also can be direction with the throughput direction of paper P along fore-and-aft direction.In this case, give the upper surface butt that send roller 33 and use paper P.In addition, in holding state, along with the upstream side towards throughput direction, second arm 32 tilts towards the top.Along with the upstream side towards throughput direction, the first arm 31 tilts towards the below.And, becoming will carry with the state before the paper time, arm angle A increases and inclination angle B reduces.Thus, sent roller 33 to move towards the downstream of throughput direction.Follow this to give and send moving of roller 33, the recuperability R that is turned round helical spring 35 increases, and increases for thus the power of the bestowing S that send roller 33.In addition, under with the paper feed status, compare with carrying the state with before the paper, arm angle A reduces and inclination angle B increases.Thus, sent roller 33 to move towards the upstream side of throughput direction.Thus, reduced, thereby reduce for the power of the bestowing S that send roller 33 because turn round the recuperability R of helical spring 35.
In the above-described embodiment, turned round helical spring 35 and also can be installed on the first arm 31.In this case, be installed in the first arm 31 and second arm 32 respectively by the both ends that will be turned round helical spring 35, thereby follow the rotation of second rotation section 62, the recuperability R that is turned round helical spring 35 increases and decreases.
In the above-described embodiment, also can replace being turned round helical spring 35 and the use leaf spring.In this case, the both ends of leaf spring are installed in respectively on the first arm 31 and second arm 32, follow the rotation of second rotation section 62 thus, leaf spring bending, so the increase and decrease of the recuperability of leaf spring.In addition, also can replace being turned round helical spring 35 and the use helical spring.In this case, helical spring both ends are installed in respectively on the first arm 31 and second arm 32, follow the rotation of second rotation section 62 thus, helical spring elongation, therefore helical spring recuperability increase and decrease.
In the above-described embodiment,, also the axial region that is equivalent to the second axle part 54 can be set on the first arm 31, and the bearing portion of the second bearing portion 45 that is equivalent to is set on second arm 32 as second fitting portion and the second axle body.
In the above-described embodiment, pick up other the position that unit 24 also can be installed in the part of loading tray 21 or printer 11.In this case, utilize above-mentioned position and clutch shaft bearing portion 43 to constitute first rotation section.In addition, in this case, also above-mentioned position can be formed the shape that is equivalent to clutch shaft bearing portion 43, and be provided with and the chimeric axial region in above-mentioned position at the first arm 31.
In the above-described embodiment, be transferred medium, except common paper, photographic paper and postcard, for example also can carry OHP etc. as what conveying device 12 was carried.
In the above-mentioned embodiment, conveying device 12 is not limited to only be applicable to ink-jet printer 11, also applicable to for example point impact printer, laser type printer, hot tranfer recording formula printer etc.In addition, be not limited to printer, also be transferred other device of medium applicable to conveying.
Claims (5)
1. conveying device is characterized in that possessing:
Delivery device body, it utilizes to sending roller to carry and is transferred medium;
The first arm, it is installed on described delivery device body, and can be that rotate with respect to described delivery device body at the center with first rotation section;
Second arm, it is installed on described the first arm, and can be that rotate with respect to described the first arm at the center with second rotation section, and is fixed with described give and send roller becoming a side opposite with described first rotation section with respect to described second rotation section;
The force section, it is to be sent roller to act on described second rotation section towards the described mode that is transferred the medium application of force with described.
2. conveying device according to claim 1 is characterized in that,
Described conveying device also possesses separating mechanism, and this separating mechanism will send first of roller butt to be transferred medium from first being transferred second of medium adjacency and being transferred medium and separating with this on stacked direction with described give,
When being used to of being produced by described separating mechanism separates described first and be transferred medium and described second and be transferred the load of medium when big, described second arm overcomes the power of bestowing of described force section and acts on described first direction that is transferred medium for the revolving force send roller to move towards described, and described thus giving send roller to increase with respect to described first power of bestowing that is transferred medium.
3. conveying device according to claim 1 and 2 is characterized in that,
The distance that connects described first rotation section and described second rotation section with straight line promptly first axle base less than be connected i.e. second axle base of described second rotation section and described distance of giving the rotating shaft that send roller with straight line.
4. according to each described conveying device in the claim 1～3, it is characterized in that,
When being changed to the described revolving force that send roller given to described when being transferred the state that medium transmits from the described rotation halted state send roller of giving, described second rotation section is so that connect the described axis of giving the rotating shaft that send roller and described second rotation section and be transferred acute angle that medium constitutes and become minimum mode and rotate.
5. according to each described conveying device in the claim 1～4, it is characterized in that,
This conveying device sent the opposed position of roller to be provided with the described mounting surface that is transferred medium of mounting with described give,
Be provided with cover in described first rotation section with the described opposed position of medium that is transferred, this cover is from described first rotation section of rotation outer side covers radially of described first rotation section, and the described mounting sheet number that is transferred medium is limited in the gap that utilizes this cover and described mounting surface to constitute
Described cover is arranged on described the first arm along with carrying the described described scope of sending the action of roller and rotating of giving that is transferred medium.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010088038A JP2011219203A (en) | 2010-04-06 | 2010-04-06 | Transportation device |
| JP2010-088038 | 2010-04-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102211470A true CN102211470A (en) | 2011-10-12 |
Family
ID=44708709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106233774A Pending CN102211470A (en) | 2010-04-06 | 2010-12-31 | Transportation apparatus |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20110241282A1 (en) |
| JP (1) | JP2011219203A (en) |
| CN (1) | CN102211470A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5935990B2 (en) * | 2012-04-27 | 2016-06-15 | セイコーエプソン株式会社 | Recording medium feeding apparatus and recording apparatus |
| JP6037201B2 (en) * | 2012-06-01 | 2016-12-07 | 株式会社リコー | Sheet conveying apparatus, image reading apparatus, and image forming apparatus |
| EP3032142A1 (en) * | 2014-12-11 | 2016-06-15 | Canon Kabushiki Kaisha | Drive transmission device for transmitting rotary drive |
| JP6880927B2 (en) * | 2017-03-30 | 2021-06-02 | ブラザー工業株式会社 | Sheet feeder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6503010B2 (en) * | 2000-05-31 | 2003-01-07 | Samsung Electronics Co., Ltd. | Paper pickup apparatus for a printer |
| CN1541920A (en) * | 2003-05-02 | 2004-11-03 | ������������ʽ���� | Paper feeding apparatus |
| JP3738497B2 (en) * | 1996-10-15 | 2006-01-25 | ブラザー工業株式会社 | Paper feeding device and printing device having the same |
| CN1923647A (en) * | 2005-08-31 | 2007-03-07 | 三星电子株式会社 | Printing media supply device for image forming apparatus |
| US20080150220A1 (en) * | 2006-12-20 | 2008-06-26 | Dean Alan Eltzroth | Friction Backup Roller for Media Picking |
-
2010
- 2010-04-06 JP JP2010088038A patent/JP2011219203A/en not_active Withdrawn
- 2010-12-31 CN CN2010106233774A patent/CN102211470A/en active Pending
-
2011
- 2011-04-06 US US13/081,137 patent/US20110241282A1/en not_active Abandoned
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3738497B2 (en) * | 1996-10-15 | 2006-01-25 | ブラザー工業株式会社 | Paper feeding device and printing device having the same |
| US6503010B2 (en) * | 2000-05-31 | 2003-01-07 | Samsung Electronics Co., Ltd. | Paper pickup apparatus for a printer |
| CN1541920A (en) * | 2003-05-02 | 2004-11-03 | ������������ʽ���� | Paper feeding apparatus |
| CN1923647A (en) * | 2005-08-31 | 2007-03-07 | 三星电子株式会社 | Printing media supply device for image forming apparatus |
| US20080150220A1 (en) * | 2006-12-20 | 2008-06-26 | Dean Alan Eltzroth | Friction Backup Roller for Media Picking |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011219203A (en) | 2011-11-04 |
| US20110241282A1 (en) | 2011-10-06 |
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Application publication date: 20111012 |