Paper-fetching mechanism
Technical field
A kind of paper-fetching mechanism is particularly relevant for a kind of paper-fetching mechanism that is applicable to autofile document feeder (Automatic Document Feeder).
Background technology
Common image input-output device, for example duplicator, facsimile apparatus and scanner or the like, its image reading system be by being placed on the file original copy top of one glass board, and below glass board optical system of configuration, to read the image of file original copy.Because the extensive application of autofile document feeder, so but the position of fixed optical system, and carry the file original copy by the autofile document feeder, read with the image that carries out the file original copy, can reduce the area of glass board.Or the autofile document feeder is positioned on the glass board of an image fetch device, then will put in order folded file is positioned in the middle of the feeding box of autofile document feeder, allow autofile document feeder in-to-in paper-fetching mechanism one by one file is delivered to the top of glass board, read with the image that carries out the file original copy.In addition, the autofile document feeder also can be applicable to chopping machine, or other need carry out the machinery of paper paging.
Please refer to Fig. 1, Fig. 2, it is the running scheme drawing of known a kind of paper-fetching mechanism in regular turn.Paper-fetching mechanism 100 has paging wheel 110, power wheel 120, paper feeding wheel 130, support portion 140 and spring 150, and it is disposed between roof 20 and the diapire 30, and wherein paper 10 is positioned over the below of paper feeding wheel 130 along the direction of arrow.And support portion 140, connect paging rotating shaft 112, drive shaft 122 and paper feed rotating shaft 132 respectively, therefore, when rotating paging rotating shaft 112, is that the axle center is rotated down with related support portion 140, paper feeding wheel 130 and the rotor wheel 120 made from paging rotating shaft 112, make paper-feed 136 will descend the surface of press contacts paper 10, and while extension spring 150, as shown in Figure 2.When continuing to rotate paging rotating shaft 112, to drive paging gear 114, and drive paper feed gear 134 through transmission gear 124, because paper feed gear 134 and paper-feed 136 be fixed on the paper feed rotating shaft 132, thereby make paper feed gear 134 drive paper-feeds 136 and promote paper 10 and advance.
Please refer to Fig. 2, when paper 10 is subjected to the promotion of paper-feed 136 to advance between paging roller 116 and the diapire 30, continues rotating shaft 112 and screw free-wheel clutch 118, rotate to drive paging roller 116.So can be by the paging roller 116 in the rotation, the paper 10 of needs is carried out after paging output finishes, moment counter-rotating paging rotating shaft 112 is to drive other mechanism immediately, this moment, free-wheel clutch 118 was had an effect, the drive that makes paging roller 116 break away from paging rotating shaft 112 forms the state that freely rotates, to avoid the paging roller 116 anti-paper 10 that push away, and cause paper fold, the spring 150 that originally was stretched simultaneously will be lifted support portion 140 on the application of force, paper feeding wheel 130 and power wheel 120, avoiding paper-feed 136 to continue to promote paper 10 equally enters, the paging rotating shaft 112 that stops operating at last makes paper-fetching mechanism 100 recover the state of Fig. 1.
Please equally with reference to figure 2, the shortcoming of known paper-fetching mechanism 100 is: after paging roller 116 carries out paging output with paper 10 partly, in the time of the counter-rotating paging rotating shaft of moment immediately 112, this moment, free-wheel clutch 118 was had an effect, make paging roller 116 break away from the drive of paging rotating shaft 112, form the state that freely rotates, to avoid paging roller 116 again other paper 10 to be carried out paging output, the spring 150 that originally was stretched simultaneously will be lifted support portion 140 on the application of force, paper feeding wheel 130 and power wheel 120, if on this, spring 150 was failed in real time moment, lift paper-feed 136, to make paper-feed 136 still be subjected to the influence of the rotation of paging rotating shaft 112, and has different linear velocities with the paging roller 116 that freely rotates, cause that paper-feed 136 is incorrect pushes or pull paper 10, the phenomenon that causes paper 10 fold to take place or tear.In addition, when structure design, known paging roller 116 is necessary identical with the outside dimension of paper-feed 136, if the outside dimension difference will cause paging roller 116 different for the linear velocity of paper 10 with paper-feed 136, and the phenomenon that makes paper 10 fold take place or tear equally easily.
Summary of the invention
The purpose of this utility model is to provide a kind of paper-fetching mechanism, be applicable to the autofile document feeder, in the paging output that stops paper, can avoid because of paper-feed different with the linear velocity of paging roller, cause paper-feed to push or pull paper, and the phenomenon that paper fold takes place or tear, stability and fluency when carrying with the increase paper paging whereby.
The purpose of this utility model is to provide a kind of paper-fetching mechanism, be applicable to the autofile document feeder, also can be under the different situation of the outside dimension of paging roller and paper-feed, make the paging roller identical for the linear velocity of paper with paper-feed, avoiding causing paper-feed to push or pull paper, and the phenomenon that paper fold takes place or tear.
Based on above-mentioned purpose of the present utility model, the utility model proposes a kind of paper-fetching mechanism, be applicable to an autofile document feeder, this paper-fetching mechanism is made of paging wheel, power wheel, paper feeding wheel, support portion and elastic body.This paper-fetching mechanism also increases by a free-wheel clutch between the paper-feed and paper feed gear of paper feeding wheel except the free-wheel clutch that the paging wheel has.When the paging conveying of desiring to stop paper, and moment counter-rotating paging rotating shaft is when driving other mechanism, two free-wheel clutchs of paging wheel and paper feeding wheel will make paging roller and paper-feed break away from the driving of motor simultaneously respectively, and present the state that freely rotates and have identical linear velocity, whereby avoiding paper to be subjected to pushing or pullling of paper-feed, and cause the fold of paper or break.
In addition, the outside dimension of its paper-feed of paper-fetching mechanism of the present utility model can design roughly less than the paging roller, so when paper-feed with paper sheet delivery during to the paging roller, make paper-feed and paging roller contact simultaneously to same paper, and when having identical linear velocity, because the external diameter of paper-feed is less than the paging roller, make that the tangential speed of paging roller will be greater than the tangential speed of paper-feed, and, cause paging gear, paging roller and paper feed gear to have unequal angular velocity because paper feed gear and paging gear have identical gear ratio.Therefore, the tangential speed of paper-feed will be greater than the tangential speed of paper feed gear, this moment, the free-wheel clutch of paper feeding wheel was had an effect, make paper-feed no longer be subjected to the drive of paper feed gear, and present the state that freely rotates, and in the paper sheet delivery process, be subjected to the drive of paper and passive rotation, whereby avoiding paper to be subjected to pushing or pullling of paper-feed, and the phenomenon that causes paper generation fold or break.
In addition, paper-fetching mechanism of the present utility model also has a paper blocking mechanism, can stop that paper is excessively pushed, and in order to avoid paper-fetching mechanism before not turning round, paper promptly enters between paging roller and the diapire in a large number, causes the phenomenon of paperboard.
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1, Fig. 2 are the running scheme drawing of known a kind of paper-fetching mechanism in regular turn.
Fig. 3, Fig. 4 are the running scheme drawing of the paper-fetching mechanism of preferred embodiment of the present utility model in regular turn.
Fig. 5, Fig. 6 are the paper-fetching mechanism of Fig. 3, Fig. 4 in regular turn, and it has the running scheme drawing of a paper blocking mechanism.
Fig. 7 is the running scheme drawing of paper blocking mechanism.Label declaration
10: paper 20: roof
30: diapire 40: driving gear
50: motor 60: swivel bearing
70: block piece 100: paper-fetching mechanism
110: paging wheel 112: paging rotating shaft
114: paging gear 116: the paging roller
118: free-wheel clutch 120: power wheel
122: drive shaft 124: transmission gear
130: paper feeding wheel 132: the paper feed rotating shaft
134: paper feed gear 136: paper-feed
140: support portion 150: spring
200: paper-fetching mechanism 210: the paging wheel
212: paging rotating shaft 214: the paging gear
216: paging roller 218: free-wheel clutch
220: power wheel 222: drive shaft
224: transmission gear 230: paper feeding wheel
232: paper feed rotating shaft 234: the paper feed gear
236: paper-feed 238: free-wheel clutch
240: support portion 242: the paging bearing
244: drive bearing 246: the paper feed bearing
248: lid 249: extendible portion
250: elasticity
The specific embodiment
Please refer to Fig. 3, Fig. 4, it is the running scheme drawing of the paper-fetching mechanism of preferred embodiment of the present utility model in regular turn.Wherein Fig. 4 omits the partial component of Fig. 3.Paper-fetching mechanism 200 includes paging wheel 210, power wheel 220, paper feeding wheel 230, support portion 240 and elastic body 250.Paging wheel 210 is disposed between the roof 20 and diapire 30 of autofile document feeder, and paging wheel 210 has paging rotating shaft 212, paging gear 214 and paging roller 216 and free-wheel clutch 218, for example is the spring loaded free-wheel clutch.Wherein paging gear 214 is connected to paging rotating shaft 212, and free-wheel clutch 218 is connected to paging rotating shaft 212 and paging roller 216.When paging rotating shaft 212 when clockwise direction rotates, will screw free-wheel clutch 218 simultaneously, and drive the rotation that paging roller 216 is made equidirectional, and the direction that screws of design free-wheel clutch 218 is the approach axis along paper 10.In addition, paging gear 214 is that the axle center rotates with paging roller 216 with paging rotating shaft 212, and paging roller 216 roughly contacts diapire 30.
Please equally with reference to figure 3, power wheel 220 is disposed between roof 20 and the diapire 30 equally, power wheel 220 has drive shaft 222 and transmission gear 224, wherein drive shaft 222 is roughly parallel to paging rotating shaft 212, and transmission gear 224 is connected in drive shaft 222, and be that the axle center rotates with drive shaft 222, and transmission gear 224 is engaged in paging gear 214.
Please equally with reference to figure 3, paper feeding wheel 230 is disposed between roof 20 and the diapire 30 equally, and paper feeding wheel has paper feed rotating shaft 232, paper feed gear 234, paper-feed 236 and free-wheel clutch 238, for example is the spring loaded free-wheel clutch.Wherein paper feed rotating shaft 232 is roughly parallel to paging rotating shaft 212, is socketed on paper feed rotating shaft 232 and paper feed gear 234 and paper-feed 236 are coaxial, and free-wheel clutch 238 is connection paper feed gear 234 and paper-feed 236 then.Wherein, the mode that free-wheel clutch 238 is connected paper feed gear 234 and paper-feed 236 comprises first kind of connection mode, paper feed gear 234 is connected to paper feed rotating shaft 232, and free-wheel clutch 238 is connected to paper feed rotating shaft 232 and paper-feed 236, or second kind of connection mode, paper-feed 236 can be connected to the paper feed rotating shaft, free-wheel clutch 238 then is connected to paper feed rotating shaft 232 and paper-feed 236, or utilize other connection mode, free-wheel clutch 238 is connected to paper feed gear 234 and paper-feed 236.It should be noted that preferred embodiment of the present utility model is that example explains with first kind of above-mentioned connection mode.
Please equally with reference to figure 3, when paper feed rotating shaft 232 when clockwise direction rotates, will screw free-wheel clutch 238 simultaneously, and drive the rotation that paper-feed 236 is made equidirectional, and design free-wheel clutch 238 screw the approach axis of direction along paper 10.In addition, paper feed gear 234 is that the axle center rotates with paper-feed 236 with paper feed rotating shaft 232, and paper feed gear 234 is engaged in transmission gear 224.
Please equally with reference to figure 3, support portion 240 has paging bearing 242, drive bearing 244, transmission shaft 246 and lid 248, wherein lid 248 is between roof 20 and paging wheel 210, power wheel 220 and paper feeding wheel 230, and paging bearing 242, drive bearing 244 and paper feed bearing 246 are connected to lid 248 respectively, wherein paging bearing 242 is socketed on paging rotating shaft 212, and drive bearing 244 is socketed on drive shaft 222, and paper feed bearing 246 is socketed on paper feed rotating shaft 232.In addition, elastic body 250 for example is a spring, and the one end is connected in lid 248, and the other end then is connected in roof 20.
For the paper-fetching mechanism that preferred embodiment of the present utility model is described is how to operate, please also refer to Fig. 3, Fig. 4, paging gear 214 is engaged in the driving gear 40 of autofile document feeder, and paging rotating shaft 212 is when being socketed on the swivel bearing 60 of autofile document feeder, when driving driving gear 40 when motor 50 runnings, driving gear 40 will provide clockwise torque to paging gear 214, to drive paging rotating shaft 212, make support portion 240, power wheel 220 and paper feeding wheel 230 are that the axle center is rotated down as cw with paging rotating shaft 212 simultaneously, paper-feed 236 will continue the upper surface of press contacts paper 10 down this moment, and tensile elasticity body 250, as shown in Figure 4.
Please equally with reference to figure 3, Fig. 4, when driving gear 40 drives paging gears 214 and rotates paging rotating shaft 212, and related when screwing free-wheel clutch 218, free-wheel clutch 218 will drive paging roller 216.In addition, driving gear 40 also rotates through paging gear 214 related drive transmission gears 224 and paper feed gear 234, rotate and drive paper feed rotating shaft 232, make paper feed rotating shaft 232 will screw free-wheel clutch 238, free-wheel clutch 238 will drive paper-feed 236 this moment.Therefore, when driving gear 40 is driven by motor 50, the upper surface of 236 times press contacts paper 10 of paper-feed will be made, as shown in Figure 4, and make paging roller 216 and paper-feed 236 rotate simultaneously, wherein paper-feed 236 promotes several paper 10 and advances, again by paging roller 216 with paper 10 paging output one by one.
Please refer to Fig. 4, because the external diameter of paging roller 216 is greater than the external diameter of paper-feed 236, when paging roller 216 and same paper 10 of paper-feed 236 contacts, paging roller 216 is identical with the cireular frequency of paper-feed 236, but because the radius of paper-feed 236 is less, to make that the cireular frequency of paper-feed 236 is fast than paging roller 216, and the cireular frequency of paging roller 216 is identical with the cireular frequency of paging rotating shaft 212, and roughly the cireular frequency with paper feed rotating shaft 232 is identical, therefore, the cireular frequency of paper-feed 236 will be greater than the cireular frequency of paper feed rotating shaft 232, this moment, free-wheel clutch 238 was not had an effect, make paper-feed 236 be the state that freely rotates, and identical with the linear velocity of paging roller 216, therefore can not push or pull same paper 10.
Please equally with reference to figure 3, Fig. 4, when desiring to stop the paging conveying of paper, motor 50 will reverse moment, when moment is reversed paging rotating shaft 212 simultaneously, free-wheel clutch 218,238 can allow paging roller 216 and paper-feed 236 break away from the driving of motor 50 simultaneously respectively, and present the state that freely rotates, and has identical linear velocity for same paper 10, push or pull paper 10 with the linear velocity difference of avoiding paging roller 216 and paper-feed 236 whereby, thereby cause the fold of paper 10 or the phenomenon of breaking.
Please refer to Fig. 5, Fig. 6, it is the paper-fetching mechanism of Fig. 3, Fig. 4 in regular turn, and it has the running scheme drawing of a paper blocking mechanism.Paper-fetching mechanism 200 also comprises a paper blocking mechanism 260, it is to be made of retaining paper bar 262 and one 264, its axis 264 is roughly parallel to paging rotating shaft 212, and protrude in the surface of the extendible portion 249 of lid 248, and retaining paper bar 262 has an axis hole 266, and it runs through the both sides of retaining paper bar 262, and retaining paper bar 262 is socketed on axle 264 with axis hole 266, and please also refer to Fig. 7, it is the running scheme drawing of paper blocking mechanism.When decommissioning, block piece 70 is positioned on the rotate path near an end of roof 20 of retaining paper bar 262, and roughly contact keeps off paper bar 262, and the part near diapire 30 of retaining paper bar 262 stops that paper 10 enters, when coming into operation, as Fig. 6, shown in Figure 7, the end near roof 20 of retaining paper bar 262 breaks away from stopping of block piece 70, make paper 10 be subjected to the promotion of paper-feed 236, and pass the original end portion of retaining paper bar 262 near diapire 30.When decommissioning once again, can the end portion design of retaining paper bar 262 is heavier, and can be subjected to gravity effect and return to reference position as Fig. 5.
Paper-fetching mechanism of the present utility model also increases by a free-wheel clutch between the paper feed gear and paper-feed of paper feeding wheel except the free-wheel clutch that the paging wheel has.When the paging of desiring to stop paper is carried and during moment counter-rotating paging rotating shaft, two free-wheel clutchs can make paging roller and paper-feed break away from the driving of motor simultaneously respectively, and present the state that freely rotates and have identical linear velocity, avoiding paper to be subjected to pushing or pullling of paper-feed, and cause the fold of paper or break.
Paper-fetching mechanism of the present utility model increases by a free-wheel clutch between paper-feed and paper feed gear, when running, can make the paper-feed of various outer diameter size identical with the linear velocity of paging roller, remove and to avoid pushing or pullling paper, still can dwindle the outside dimension of paper-feed, and then effectively reduce material cost.
Paper-fetching mechanism of the present utility model also has a paper blocking mechanism, can stop that paper is excessively pushed, and in order to avoid paper-fetching mechanism before not turning round, paper promptly enters the phenomenon that causes paperboard between paging roller and the diapire in a large number.
Though the utility model with a preferred embodiment openly as above; right its is not in order to limiting the utility model, anyly is familiar with this operator, in not breaking away from spirit and scope of the present utility model; when doing some change and retouching, therefore protection domain of the present utility model is as the criterion when looking book.