CN1756291A - Image reading apparatus and image forming apparatus provided with the same - Google Patents

Abstract

An image reading apparatus has an original placing portion on which an original is placed, a feed portion for feeding the original placed on the original placing portion to convey the original from one end side of an original plate onto the original plate, a conveying rotary member for conveying the original on the original plate, a reversing and conveying portion for reversing the front side and back side of the original conveyed to the other end side of the original plate by the conveying rotary member, and conveying the reversed original from the other end side onto the original plate, an image reading unit for reading the image of the original stopped on the original plate while being moved, and a control portion for controlling the driving of the conveying rotary member. The control portion controls the conveying rotary member so as to stop the original conveyed from the one end side by the feed portion at a first reading position on the original plate, and stop the original conveyed from the other end side by the reversing and conveying portion at a second reading position on the original plate differing from the first reading position.

Description

Image read-out and the image processing system that is provided with this image read-out

Technical field

The present invention relates to image read-out and the image processing system that is provided with this image read-out.

Background technology

For example, the photocopier as an example of image processing system is provided with the image read-out that is used to read original image.Image read-out is provided with and is used to read the image reading unit spare of original image and is used for original copy is transported to the automatic document feeder that the position is read in the appointment that is read.

When the image of original copy in such image read-out will be read, original copy was placed on the original copy stack portion of automatic document feeder, and original copy is transported on the document board subsequently.After original copy had been transported on the document board, original image read (seeing Japanese Patent Application No.2002-049188 and Japanese Patent Application No.2003-046728) by image reading unit spare.

Accompanying drawing 6 shows an example of this traditional images reading device.In Fig. 6, alphabetical A presentation video reading part, letter b is represented automatic document feeder.Automatic document feeder B is installed as and covers the upper surface that is arranged on the document board 101 on the image reading unit A.

Automatic document feeder B has and wherein is provided with the original copy stack portion U101 that original copy piles up platform 102, meets the original copy feeding U102 of portion that Di separates with the feeding original copy with being used for from being stacked on one of a pile original copy G that original copy piles up on the platform 102.Automatic document feeder B further comprises original copy delivery section U103, and it is provided with walks around drive roll 105 and driven voller 106 and be pressed against conveyer belt 104 on the document board 101 by band pressure guide wheel 107a-107d.Automatic document feeder B is provided with original copy upset and the discharge portion U104 that is used for after reading upset and discharges original copy G.

In addition, image reading unit A has fluorescent lamp 115, and it is as the illuminace component of the original copy of illumination on document board 101.Image reading unit A has the illumination light photograph that is used for 115 emissions of autofluorescence lamp and delivers to the lip-deep reflector 116 of original copy.Image reading unit A has and is used for first speculum 117 of turning back from the light of original copy reflection.The first scan light department of the Chinese Academy of Sciences 113 that is arranged among the image reading unit A has fluorescent lamp 115, reflector 116 and first speculum 117.Image reading unit A has the second scan light department of the Chinese Academy of Sciences 114 that is provided with second speculum 118 and the 3rd speculum 119, and wherein, second speculum 118 and the 3rd speculum 119 are used for and will turn back from the light of first speculum 117.Image reading unit A is provided with lens 120 and ccd sensor, wherein, passes lens 120 from the light of the second scan light department of the Chinese Academy of Sciences 114, and the light that has passed lens 120 incides on the ccd sensor and the image information of original copy carried out opto-electronic conversion thereon.

Here, the first scan light department of the Chinese Academy of Sciences 113 of composing images reading unit and the second scan light department of the Chinese Academy of Sciences 114 are by guiding of track component (not shown) and maintenance, to move along direction of being represented by arrow D or the direction of being represented by arrow J in image reading unit A.So design so that when original copy G be located on the document board 101 as the original copy benchmark C of the image reading position of benchmark the time, the direction that the first and second scan light departments of the Chinese Academy of Sciences 113 and 114 edges are represented by arrow D moves and scans, thereby reads the image of original copy.The second scan light department of the Chinese Academy of Sciences 114 and the first scan light department of the Chinese Academy of Sciences, 113 same moved further are so that the optical path length in the scanning process can be constant.

To provide description now as the original image read operation of the image read-out of above-mentioned structure.

When the image of original copy will be read, be placed on one of the top that original copy piles up the original copy G on the platform 102 and separate by the original copy feeding U102 of portion and carry.Then, separate like this and the uppermost original copy G that carries is directed into registration roller to 103a and 103b.Be directed into registration roller and tiltedly send correction by registration roller to 103a and 103b, and be transported to original copy delivery section U103 subsequently the original copy of 103a and 103b.After being transported to original copy delivery section U 103, original copy enters between the conveyer belt 104 and document board 101 that is pressed against on the document board 101.

When original copy G arrived on the document board 101, conveyer belt 104 rotated.By the rotation of conveyer belt 104, original copy G carries in the direction that document board 101 upper edge arrow D represent by the frictional force of conveyer belt 104.Thereafter, when H arrived the original copy benchmark C of the image reading position on the document board 101, conveyer belt 104 stopped, and original copy G stops with respect to the upstream side of original copy throughput direction (below be called trailing edge) as the original copy G that is carried by conveyer belt 104.This original copy benchmark C of image reading position is usually located at the left side (original copy feeding portion side) of document board 101.

Then, when original copy G so stopped, the first and second scan light departments of the Chinese Academy of Sciences 113 and 114 directions of representing along arrow D moved and scan, and move and scan period at this, were mapped to original copy from the illumination of fluorescent lamp 115.Subsequently, propagate via first to the 3rd speculum 117,118 and 119 from the light scioptics 120 of original copy reflection, and imaging on C CD transducer 121.Thereby read the image of original copy.

Then, after such original image read end, conveyer belt 104 rotated again, thereby original copy G carries along the direction of being represented by arrow D, and was incorporated into original copy upset and discharge portion U104 via the right side spring platform 108 that is fixed to document board 101 right-hand members.

At this moment, when the single face read mode was set to read mode, original copy G was overturn by original copy upset and discharge portion U104, and is transported to once more on the document board 101.At this moment, original copy G presents its positive supine state.

Subsequently, original copy G is discharged on the original copy discharge platform by original copy upset and discharge portion U 104.

The front of the original copy G that discharges faces down.The discharge that faces down of front by original copy G, when original copy G was discharged continuously, the original copy G of discharge was according to page number sequence stack.

On the other hand, when two-sided read mode was set to read mode, original copy G was transported to document board 101 by original copy upset and discharge portion U 104 at its back side of not reading with facing down.

Then, original copy G is carried along the direction that arrow J represents by conveyer belt 104.By being fixed to the left side spring platform 111 of document board 101 left ends, as shown in Figure 9, original copy G is transported to the prelocalization transducer 112 that is arranged in the original copy feeding U102 of portion by registration roller to 103a and 103b.Subsequently, in the time of between the downstream side with respect to throughput direction relative with trailing edge H, original copy G (after this being called leading edge) N is through the light emission part 112a that constitutes the prelocalization transducer and light receiver 112b, conveyer belt 104 and registration roller be to 103a and 103b backward rotation, thereby carry original copy G along the direction that arrow D represents.

When the direction of so representing along arrow D as original copy G was carried, its leading edge N was detected by prelocalization transducer 112 once more.If as above-mentioned design, original copy G begins to be transferred a reservation amount from the moment that leading edge N has been detected, original copy G can stop at the original copy benchmark C place of image reading position.Even change the size of original copy G, from prelocalization transducer 112 detected leading edge N the time to be carved into the conveying capacity of original copy benchmark C of image reading position constant.Therefore, will never depend on the size of original copy, the original copy stop position becomes inhomogeneous.Under the situation in the original copy front of having described, also be same control.

Then, as under the situation in front, the first and second scan light departments of the Chinese Academy of Sciences 113 and 114 directions of representing along arrow D move and scan, and the image of going up overleaf thus is read.Thereafter, the original copy G that has been read of image is introduced in original copy upset and discharge portion U104 once more.

Then, original copy G is discharged to original copy by original copy upset and discharge portion U 104 and discharges platform 110.At this moment, its front of original copy G of discharge faces down, and with the same under the situation of single face read mode, the original copy G that discharges is according to page number sequence stack continuously.

This moment, under the situation of single face read mode, after the image of original copy reads, the first and second scan light departments of the Chinese Academy of Sciences 113 and 114 directions of representing along arrow J move and get back at the position of readiness shown in Fig. 6, and stop subsequently, be positioned at original copy benchmark C as the image reading position of benchmark until next original copy.

Equally, under the situation of two-sided read mode, the first and second scan light departments of the Chinese Academy of Sciences 113 and 114 images that read on the original copy front, and the direction of representing along arrow J for the first time subsequently moves and gets back at the position of readiness shown in Fig. 6.Then, original copy is by original copy upset and discharge portion U104 upset, and its back side is ventricumbent in order to read, the image on the back side of the original copy G at the original copy benchmark C place that is positioned at image reading position, the first and second scan light departments of the Chinese Academy of Sciences 113 and 114 directions of representing along arrow D move, and the direction of representing along arrow J subsequently moves and get back to position of readiness.

Yet, at this traditional image read-out and being provided with in the photocopier (image processing system) of this image read-out, when the image on the front and back at original copy will be read, image on the front at first is read at the image reading position place, subsequently, original copy is transported to original copy upset and discharge portion.Then, the front and back of original copy is in the original copy upset and discharge portion is reversed and original copy is got back to document board, and subsequently, original copy is transported to left end and gets back to original copy feeding portion from the right-hand member of document board.Subsequently, original copy is transported to and positive the same image reading position once more.Therefore, original copy carries the distance of process very long, thereby causes productivity ratio to descend.

Japanese Patent Application No.2003-046728 discloses a kind of structure, in this structure, is opposite when reading original copy when the direction that scanner moves reads original copy before upset and after upset.Yet in the structure of Japanese Patent Application No.2003-046728, the position that stops when original copy stops when reading original copy before the upset position original copy when reading original copy after upset is the same.The detailed description that Japanese Patent Application No.2003-046728 does not provide the conveying of original copy and stops.

Summary of the invention

Therefore, the present invention considers these situations and makes, and the image read-out of boosting productivity will be provided and be provided with the image processing system of this image read-out as its purpose.

Image read-out of the present invention has: the original copy stack portion, place original copy thereon; Feeding portion is used for feeding and is placed on original copy on the original copy stack portion, with distolateral be transported to document board on of original copy from document board; Carry revolving member, be used to carry the original copy on the document board; The upset delivery section, being used to overturn is transported to the front and back of another distolateral original copy of document board by the conveying revolving member, and the original copy that will overturn is from another distolateral being transported on the document board; Image fetching unit is used for reading the image that stops at the original copy on the document board when moving; And control part, be used to control the driving of carrying revolving member, wherein, revolving member is carried in control part control, so that stop at first image reading position on the document board from the original copy of a distolateral conveying by feeding portion, and make by the upset delivery section and stop at second image reading position that document board is different from first image reading position, and second position of readiness that image fetching unit first position of readiness of preparing to read the original copy that stops at the first image reading position place and image fetching unit prepare to read the original copy that stops at the second image reading position place is different position from the original copy of another distolateral conveying.

In addition, image read-out of the present invention has: the original copy stack portion, place original copy on it; Feeding portion is used for feeding and is placed on original copy on the original copy stack portion with distolateral the be transported to document board of original copy from document board; Carry revolving member, be used to carry the original copy on the document board; The upset delivery section, being used to overturn is transported to the front and back of another distolateral original copy of document board by the conveying revolving member, and the original copy that will overturn is from another distolateral being transported on the document board; Image fetching unit is used for reading the image that stops at the original copy on the document board when moving; And control part, be used to control the driving of carrying revolving member, wherein, revolving member is carried in control part control, so that stop at first image reading position on the document board from the original copy of a distolateral conveying, and make by the upset delivery section and stop at second image reading position that document board is different from first image reading position from the original copy of another distolateral conveying by feeding portion.

Description of drawings

Fig. 1 shows the structure of a digital copier, and this digital copier is an example that is provided with according to the image processing system of the image read-out of the embodiment of the invention.

Fig. 2 shows the structure of image read-out.

Fig. 3 is first figure of the image read operation of explanation image read-out.

Fig. 4 is second figure of the image read operation of explanation image read-out.

Fig. 5 is the 3rd figure of the image read operation of explanation image read-out.

Fig. 6 shows the structure of traditional images reading device.

Fig. 7 A and 7B are that thin slice that explanation is arranged on the thin slice upset of the automatic document feeder in the image read-out according to an embodiment of the invention and discharge portion overturns and first figure of discharging operation.

Fig. 8 A and 8B are that thin slice that explanation is arranged on the thin slice upset of the automatic document feeder in the image read-out according to an embodiment of the invention and discharge portion overturns and second figure of discharging operation.

Fig. 9 shows the structure that is arranged on the original copy feeding portion in the traditional images reading device.

Embodiment

Provide the detailed description that realizes best mode of the present invention hereinafter with reference to the accompanying drawings.

Fig. 1 shows the structure of a digital copier, and this digital copier is an example that is provided with according to the image processing system of the image read-out of the embodiment of the invention.

In Fig. 1, Reference numeral 50 expression digital copiers, and Reference numeral 51 expression digital copier main bodys (below be called apparatus main body).The image read-out 100 that is provided with automatic document feeder B and image reading unit A is arranged on the top of apparatus main body 51.Image forming part 52 is arranged on the middle part of apparatus main body 51.

In the digital copier 50 of this structure, under the situation that image forms, be placed on a large amount of original copy G on the document feeder B and be fed at first continuously and read the position.The original copy G of feeding is read by image reading unit spare, and this image reading unit spare will be described after a while, and in addition, read information according to this, and toner image is formed on the surface of photosensitive drums 53 of image forming part 52.

Then, with photosensitive drum surface on the synchronized relation that forms of toner image in, be transported between photosensitive drums 53 and the transfer printing charger 56 by registration roller 55 by the recording medium S of thin slice feeding portion 54 feedings.Then, by applying bias voltage to transfer printing charger 56, the toner image that is formed on the photosensitive drums 53 is transferred to recording medium S.

Then, transfer printing the recording medium S of toner image be transported to photographic fixing portion 58 by conveyer belt 57.By photographic fixing portion 58 heat and pressure are applied to recording medium S, toner image is to recording medium S thus.At last, this recording medium S is discharged on the thin slice discharge platform 60 by distributing roller 59.

Fig. 2 shows the structure according to the image read-out of present embodiment.

As shown in Figure 2, automatic document feeder B is provided with original copy stack portion U1 and the original copy feeding U2 of portion, wherein, be provided with original copy in this original copy stack portion U1 and pile up platform 102, the original copy feeding U2 of portion is used for piling up one of one pile of original copy on the platform 102 and connecing a ground and separate and the feeding original copy from being placed on original copy, and they are transported on the document board 101.

The original copy feeding U2 of portion will be fed on the document board 101 at the original copy that original copy piles up on the platform 102 as one distolateral (left side Fig. 2) from document board 101.The original copy feeding U2 of portion has pick-up roller 192 and thin slice feed rolls 11, and pick-up roller 192 is used to pick up and is placed on original copy with feeding and piles up original copy on the platform 102, thin slice feed rolls 11 be used for one connect that a ground separates and feeding by the original copy of pick-up roller 192 feedings.The original copy feeding U2 of portion also has registration roller to 191, and it is used for the original copy by 11 feedings of thin slice feed rolls is transported to document board 101.

Automatic document feeder B has original copy delivery section U3, and it is used to carry the original copy on the document board 101.Original copy delivery section U3 is provided with the conveyer belt 104 of walking around driven roller 105 and driven voller 106 and pressing document board 101 by band pressure guide wheel 107a-107d.Conveyer belt 104 is as carrying revolving member to be arranged among the original copy delivery section U3, and it carries original copy on document board, and original copy is stopped at pre-position on the document board.

In addition, automatic document feeder B also is provided with original copy upset and discharge portion (upset delivery section) U4, and it is used for upset and discharge original copy G after reading.Original copy upset and discharge portion U4 will be overturn by the front and back that conveyer belt 104 transfer out the original copy of document board 101 another distolateral (right sides among Fig. 2), and once more with original copy from document board 101 another distolateral being transported on the document board 101.Original copy upset and discharge portion U4 can also be discharged to the original copy that is transferred out document board 101 another distolateral (right sides among Fig. 2) by conveyer belt 104 original copy and discharge on the platform 110.Original copy upset and discharge portion U4 are provided with right spring platform 8, forward and rotating backward twist rollers 109, path of navigation P1, path P 2, discharge path P3 and outgoing route P4 overturn.

The first scan light department of the Chinese Academy of Sciences 13 that is arranged in the image reading unit A has fluorescent lamp 115, reflector 116 and first speculum 117.Image reading unit A has 14, the second scan light departments of the Chinese Academy of Sciences 14 of the second scan light department of the Chinese Academy of Sciences and is provided with second speculum 118 and the 3rd speculum 119 that the light of first speculum 117 is turned back.Image reading unit A is provided with in addition: lens 120, from the light of the second scan light department of the Chinese Academy of Sciences 14 by these lens 120; And ccd sensor (image read element) 121, the light of scioptics 120 incides on this ccd sensor 121, and the image information of original copy is carried out opto-electronic conversion thereon.

Here, the first scan light department of the Chinese Academy of Sciences 13 of composing images reading unit and the second scan light department of the Chinese Academy of Sciences 14 are by track segment (not shown) guiding and support, move with the direction of representing along arrow D or J in image reading unit A.When original copy was placed on the document board 101, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 directions of representing along arrow D moved and scan, to read the image of original copy thus.The second scan light department of the Chinese Academy of Sciences 14 and the first scan light department of the Chinese Academy of Sciences, 13 same moved further, thus scan period optical path length can be constant.

The driving of the control part X control original copy feeding U2 of portion, original copy delivery section U3 and original copy upset and discharge portion U4.In addition, control part X controls the operation of the first and second scan light departments of the Chinese Academy of Sciences 13 and 14.

113 and 114 functions of the first and second scan light departments of the Chinese Academy of Sciences of the traditional images reading device among the present invention among the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 function and effect and the Fig. 6 that had described and act on identical.Therefore, needn't do the function of the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 and the description of effect.

In Fig. 2, tee is represented the original copy benchmark (first reference position) of first image reading position, and this first image reading position is arranged on the left end into document board 101 1 ends.The benchmark T of first image reading position is arranged on the left end 11mm place apart from document board 101.In addition, alphabetical V represents the original copy benchmark (second reference position) of second image reading position, and this second image reading position is arranged on the right-hand member into document board 101 other ends.The benchmark V of second image reading position is arranged on the right-hand member 11mm place apart from document board 101.

Prelocalization transducer 12 is arranged among the original copy feeding U2 of portion, and this prelocalization transducer 12 is provided with light emission part 12a and light receiver 12b.The original copy G that is carried by the original copy feeding U2 of portion can be by prelocalization transducer (feeding portion transducer) 12 detections, to survey the length of original copy on the original copy throughput direction thus with respect to the upstream edge of the original copy throughput direction trailing edge K of original copy (below be called) with respect to the downstream edge of the original copy throughput direction leading edge M of original copy (below be called) and original copy G.

In addition, original copy G begins to carry a scheduled volume from the moment that prelocalization transducer 12 has detected original copy trailing edge K, original copy G can always stop at the original copy benchmark T place as first image reading position of benchmark thus, wherein, this prelocalization transducer 12 is the sniffers that are used to survey the length of the original copy in the original copy transmission direction.That is, based on the output of prelocalization transducer 12, the rotation of control part X control conveyer belt 104, thus can stop at original copy benchmark T place by the original copy that conveyer belt 104 is carried as first image reading position of benchmark.

In addition, Reference numeral 22 expressions are arranged on the upset portion transducer among original copy upset and the discharge portion U4, and should be provided with light emission part 22a and light receiver 22b by upset portion transducer.Situation under two-sided read mode will described after a while, the trailing edge of original copy is surveyed by this upset portion transducer 22, and original copy is constantly carried a scheduled volume from that, thereby original copy G can always stop at the original copy benchmark V place as second image reading position of benchmark.That is, based on the output of upset portion transducer 22, the rotation of control part X control conveyer belt 104, thus can stop at original copy benchmark V place by the original copy that conveyer belt 104 is carried as second image reading position of benchmark.

Now, during original copy is by the original copy feeding U2 of portion feeding in, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 stop at the first position of readiness Q place.The first position of readiness Q is the corresponding position of original copy benchmark T with first image reading position.Then, when original copy G stops at original copy benchmark T place as first image reading position of benchmark, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 directions of representing along arrow D scan along the original copy G that stops, read the front of original copy G thus, wherein, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 are image read-outs.In the present embodiment, the first and second scan light departments of the Chinese Academy of Sciences 13 corresponding with the length L of original copy G and 14 displacement are surveyed by prelocalization transducer 12.

In addition, after the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 had read the front of original copy, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 did not return the first position of readiness Q shown in Fig. 3, and this will describe subsequently.After the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 had read the front of original copy, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 moved to the second position of readiness R shown in Fig. 4, and stop at the second position of readiness R.Second position of readiness be with from the original copy benchmark V of second image reading position corresponding position, position to the first from left amount, this amount is with corresponding by the length L of the original copy G of prelocalization transducer 12 detections.That is, second position of readiness is the corresponding position, position with the other end of the original copy that stops, thereby an end may overlap with the original copy benchmark V of second image reading position thus.After the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 had moved to the second position of readiness R, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 stopped there, stopped at original copy benchmark V place as second image reading position of benchmark up to original copy G.

Then, the situation under two-sided read mode will described subsequently, and original copy G is by original copy upset and discharge portion U4 upset.When trailing edge K was transported to the original copy benchmark V of second image reading position, the original copy that is overturn by original copy upset and discharge portion U4 stopped.After original copy had stopped at the second image reading position V, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 directions of representing along arrow D scanned and the corresponding amount of being surveyed by prelocalization transducer 12 of original copy length L, the back side of reading original copy G thus along original copy G.After the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 had read the back side of original copy G thus, the first position of readiness Q that the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 turn back at left end was to read the front of next original copy.

The operation of image read-out 100 when reading the image of original copy will be described in more detail below.

Being placed on pick-up roller 192 by the original copy feeding U2 of portion in the top that original copy piles up the original copy G of platform 102 separates with feed rolls 11 and carries.The uppermost original copy G that so separates and carry is directed into registration roller to 191.Be directed into registration roller and to 191 original copy it tiltedly sent by registration roller to proofread and correct, and be transported to original copy delivery section U3 subsequently 191.After being transported to original copy delivery section U3, original copy is transported between the conveyer belt 104 and document board 101 that presses document board 101.

When original copy G entered on the document board 101, conveyer belt 104 rotated.By the conveyer belt 104 that rotates, original copy G utilizes the frictional force of conveyer belt 104 to carry in the direction that document board 101 upper edge arrow D represent.Thereafter, the original copy G that is carried by conveyer belt 104 arrives the original copy benchmark T of first image reading position of document board 101 with respect to the upstream lateral margin of throughput direction (below be called trailing edge) K, and conveyer belt 104 stops in view of the above, and original copy G stops.That is, the rotation of control part X control conveyer belt 104, thus original copy can stop at the position that the hinder marginal part of original copy overlaps with the original copy benchmark T of first image reading position.

Subsequently, when original copy G so stopped at first image reading position, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 directions of representing along arrow D moved and scan, and move and scan period at this, were mapped to original copy from the illumination of fluorescent lamp 115.Light from the original copy reflection is propagated by lens 120 via first to the 3rd speculum 117,118 and 119, and imaging on ccd sensor 121.Read the image of original copy thus.

Subsequently, after this image of original copy read end, conveyer belt 104 rotated once more, and original copy G carries along the direction that arrow D represents thus, and entered original copy upset and discharge portion U4 by right side spring platform 8 guiding that are fixed on document board 101 right-hand members.

Be set at the single face read mode under the situation of read mode, original copy G is fed among the path of navigation P1 of original copy upset and discharge portion U4, shown in Fig. 7 A.After in being fed into path of navigation P1, the direction that original copy is represented along arrow E by twist rollers 109 is rotating drive forward, passes upset path P 2 and is fed among the discharge path P3, and further be fed in the feed path P 4.

After original copy G had been fed in the feed path P 4, conveyer belt 104 was reversed driving along the direction that arrow J represents.Original copy G is transported on the document board 101 by the conveyer belt 104 that is reversed driving once more, shown in Fig. 7 B, so twist rollers 109 stops action.At this moment, original copy G presents its heads state.

Then, shown in Fig. 8 A, the trailing edge K of original copy G passes the clamping part between twist rollers 109 and the upset guide wheel 109a.Subsequently, at predetermined instant, twist rollers 109 is reversed driving along the direction that arrow F represents, and movable lug retaining F1 pivoting action up in addition, and conveyer belt 104 driven forwards along the direction that arrow D represents, thus original copy G is rotated back into feed path P 4.Thereby shown in Fig. 8 B, original copy G is discharged to original copy through discharge path P3 and discharges on the platform 110.

At this moment, the front of original copy G faces down, and faces down in its front when being discharged continuously as original copy G, and the original copy of discharge is according to page number sequence stack.

To be given under the two-sided read mode description of the image read operation of the image read-out 100 of this structure now.

As shown in Figure 2, being placed on the original copy G that the original copy of original copy stack portion U1 piles up on the platform 102 is transported on the document board 101 by the original copy feeding U2 of portion under its positive ventricumbent state.At this moment, when the size of original copy G for example was A4, it was 210mm along the length L of throughput direction that control part X detects this original copy G by the original copy length information from prelocalization transducer 12.Thereafter, the rotation of control part X control conveyer belt 104 with rotational conveyance band 104, and from detecting moment conveying original copy G one preset distance of original copy trailing edge K, stops this original copy G then.By this operation, original copy G stops at the original copy benchmark T place as first image reading position of benchmark.

The first and second scan light departments of the Chinese Academy of Sciences 13 and 14 as shown in Figure 3, stop at the first position of readiness Q place of left end, stop until original copy.The first position of readiness Q is the position of readiness that the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 are used to read the image of the original copy that stops at the first image reading position place.The first position of readiness Q is a position corresponding with the original copy benchmark T of first image reading position.

When the original copy G that has been transported to the original copy benchmark T of first image reading position as its trailing edge K stops at that time, the directions that the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 represent along arrow D are along amount of original copy G scanning, this amount with by the length L of the original copy G of prelocalization transducer 12 detections (=210mm) corresponding.Thus, read the front of original copy G.

In the present embodiment, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 the first position of readiness Q are such positions, this position along with the opposite direction J in scanning direction of the first and second scan light departments of the Chinese Academy of Sciences 13 and 14, depart from a scheduled volume with respect to the original copy benchmark T of first image reading position.Therefore, after being moved a preset distance, during the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 beginning read operations and the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 are moved further the amount corresponding with the length L of original copy, carry out the original copy read operation.

The first and second scan light departments of the Chinese Academy of Sciences 13 and 14 the first position of readiness Q and the original copy benchmark of first image reading position can be made mutual coincidence.

Then, after this of original copy front read end, conveyer belt 104 rotated once more, and original copy G carries along the direction that arrow D represents thus.Original copy is introduced among original copy upset and the discharge portion U4 via the right side spring platform 8 that is fixed on document board 101 right-hand members.

In this original copy upset and discharge portion U4, original copy is by designated order process path of navigation P1, upset path P 2, discharge path P3 and feed path P 4, and original copy G is not transported on the document board 101 under the ventricumbent state of reading face once more at it.At this moment, control part X begins to carry a scheduled volume by the moment that upset portion transducer 22 detects with original copy G from original copy trailing edge K, and stops original copy then.Thus, original copy G stops at the original copy benchmark V place as second image reading position of benchmark.

Now, after the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 had read the front of original copy, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 did not return first position of readiness.After the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 have read the front of original copy, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 move to the second position of readiness R shown in Fig. 4, and they stop at the second position of readiness R, stop at once more on the document board 101 until the original copy G that its front and back has overturn.The second position of readiness R be with from the original copy benchmark V of second image reading position left with the original copy length L of surveying by prelocalization transducer 12 (=210mm) the corresponding position, a position of corresponding amount.

When the trailing edge K of original copy G is transported to the original copy benchmark V of second image reading position and original copy when stopping, the direction that the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 represent along arrow D is along original copy G scanning and original copy length L (=210mm) corresponding amount.Thus, read the back side of original copy G.

In the present embodiment, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 the second position of readiness R are such positions, the direction of this position for representing along the arrow J opposite with the scanning direction of the first and second scan light departments of the Chinese Academy of Sciences 13 and 14, the position that the position of the original copy benchmark V original copy length L of distance second image reading position is further departed from a scheduled volume left.Thereby after the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 had been moved a preset distance, read operation began, and the original copy read operation the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 be moved further the amount corresponding with the original copy length L during in carry out.

The first and second scan light departments of the Chinese Academy of Sciences 13 and 14 the second position of readiness R and can overlap mutually apart from one position, left side of the original copy benchmark V original copy length L of second image reading position.

Then, after this image at the original copy G back side read end, conveyer belt 104 rotated once more, thereby original copy G carries along the direction that arrow D represents.Original copy is introduced among original copy upset and the discharge portion U4 via right side spring platform 8 once more.Then, original copy is discharged on the original copy discharge platform 110 by original copy upset and discharge portion U4.That is, the direction of representing along the arrow F shown in Fig. 8 A by twist rollers 109 drives, and is fed into original copy G among the path of navigation P 1 of original copy upset and discharge portion U4 through discharge path P 3, and is discharged on the original copy discharge platform 110, shown in Fig. 8 B.In addition, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 turn back to the first position of readiness Q at left end shown in Fig. 3, to read the front of next original copy.

When original copy is of a size of other sizes for example during B4, it is 364mm that the length G of original copy is surveyed by prelocalization transducer 12.Thereby as has been described, the trailing edge K of original copy G is transported to the original copy benchmark T of first image reading position, and original copy G stops.The direction that the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 represent along arrow D is along the original copy length L of original copy G scanning and detection (=364mm) corresponding amount, the front of reading original copy thus.

In addition, be under the situation of 364mm in the length L of original copy G, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 do not return first ready position after the front of reading original copy G.The first and second scan light departments of the Chinese Academy of Sciences 13 and 14 move to the position of readiness Z shown in Fig. 5, this position of readiness Z with from the original copy benchmark V of second image reading position corresponding to the original copy length L of surveying (=364mm) left a position is corresponding.After the front and back of original copy was overturn by original copy upset and discharge portion U4, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 stopped at position of readiness Z, stopped at original copy benchmark V place as second image reading position of benchmark until original copy G.

Then, the trailing edge K of original copy G is transported to the original copy benchmark V of second image reading position, and original copy G stops, so the scanning direction that the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 represent along arrow D and original copy length L (=364mm) corresponding amount.Thereby, the back side of reading original copy G.

Then, after the original copy back side this read end, conveyer belt 104 rotated once more.By the rotation of conveyer belt 104, original copy G carries along the direction that arrow D represents, and is again directed among original copy upset and the discharge portion U4 via right side spring platform 8, and is discharged on the original copy discharge platform 110 by original copy upset and discharge portion U4.In addition, the first position of readiness Q that the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 turn back in the left side shown in Fig. 3 is to read the front of next original copy.

When as in the present embodiment when the back side image of original copy G will be read, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 are in left end side, and at the original copy benchmark V of second image reading position.When the back side will be read, the scanning of the first and second scan light departments of the Chinese Academy of Sciences from the left end of document board 101 to right-hand member will not take place, and move from the right-hand member to the left end to return the position of readiness at left end.Thereby the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 displacement can shorten.

In other words, when the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 read the original copy G that stops at as the original copy benchmark V of second image reading position of benchmark, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 the position of readiness position of readiness when reading the original copy G that stops at as the original copy benchmark T of first image reading position of benchmark when them is compared, more near second image reading position.Therefore, can shorten the displacement of the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 when they read the original image that stops at second image reading position.That is, after the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 had read the front of original copy, the distance that they move with the back side of reading original copy became shorter.Therefore, the time before the image read operation begins becomes shorter, and productivity ratio can improve.

In the description in front, described when the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 and read when stopping at the original copy G that the second reading fetch bit puts, the first and second scan light departments of the Chinese Academy of Sciences 13 and 14 second position of readiness from the original copy benchmark V of second image reading position to close on first image reading position with the corresponding distance of original copy length.Yet, if the first and second scan light departments of the Chinese Academy of Sciences 13 compare with 14 position of readiness when reading the original copy G that stops at first image reading position in the first and second scan light departments of the Chinese Academy of Sciences 13 and 14, second position of readiness is arranged more near second image reading position, then the time before the image read operation begins will become shorter, and productivity ratio can improve.

In the present embodiment, make design like this, so that as already described, compare with the position of readiness that reads when image read-out when stopping at first original copy and reading the position when the position of readiness that reads the image read-out when stopping at second original copy and reading the original copy of position, read the position near second original copy more.Therefore,, can shorten the distance that moves from the position of readiness of image read-out when reading when stopping at second original copy and reading the original image of position, thus the time before the image read operation begins become shorter, and productivity ratio can improve.

In the above-described embodiments, for the sniffer that is used to survey original copy length, shown a kind of structure as an example, in this structure, the leading edge of the original copy that just is being transferred and trailing edge are surveyed by prelocalization transducer 12, to survey the length of original copy along its throughput direction thus.Yet, can be stacked on the structure that original copy piles up the transducer of the original copy on the platform 102 with detection, and can survey the length of original copy by this transducer.In this case, for example, several transducers that are used for acquisition sensor can be arranged on original copy along throughput direction and pile up platform 102, thereby based on the output of several transducers, control part X can judge the length of original copy.In addition, can be used to survey the sniffer of original copy length by this formal construction, promptly the user is input to operating portion etc. with the length of original copy, and control part X discerns the length of original copy along the length of throughput direction based on the original copy of user's input.

Claims (13)

1. image read-out, it comprises:

The original copy stack portion is placed original copy thereon;

Feeding portion is used for feeding and is placed on original copy on the described original copy stack portion, with distolateral be transported to described document board on of original copy from document board;

Carry revolving member, be used on described document board, carrying original copy;

The upset delivery section, being used to overturn is transported to the front and back of another distolateral original copy of described document board by described conveying revolving member, and is transported on the described document board from another distolateral original copy that will overturn;

Image fetching unit is used for reading the image that stops at the original copy on the described document board when moving;

Control part is used to control the driving of described conveying revolving member,

It is characterized in that, described control part is controlled described conveying revolving member, so that stop at first image reading position on the described document board from the original copy of this distolateral conveying by described feeding portion, stop at second image reading position that described document board is different from described first image reading position with making from the original copy of this another distolateral conveying by described upset delivery section, and

Described image fetching unit stops at first position of readiness, to read the original copy that stops at described first image reading unit, and described image fetching unit stops at second position of readiness, to read the original copy that stops at described second image reading unit, first position of readiness and second position of readiness differ from one another.

2. image read-out according to claim 1 is characterized in that, described first image reading position is this distolateral position at described document board, and described second image reading position is this another the distolateral position at described document board.

3. image read-out according to claim 2, it is characterized in that, described first position of readiness of described image fetching unit is this distolateral position at described document board, and described second position of readiness of described image fetching unit is this another the distolateral position at described document board.

4. image read-out according to claim 1, also comprise the sniffer that is used to survey the length of original copy on the original copy throughput direction, it is characterized in that described second position of readiness of described image fetching unit changes according to the original copy length by described detection when reading the original copy that stops at the described second image reading position place.

5. image read-out according to claim 1, it is characterized in that, described first position of readiness of described image fetching unit is aimed at the edge of the original copy that stops at the described first image reading position place basically, and described second position of readiness of described image fetching unit is aimed at the edge of the original copy that stops at the described second image reading position place basically.

6. image read-out according to claim 1, it is characterized in that, described first image reading position is such position, in this position, the edge that stops at the original copy of described first image reading position is aimed at this distolateral first reference position that is arranged on described document board, and described second image reading position is such position, in this position, the edge that stops at the original copy of described second image reading position is aimed at this another distolateral second reference position that is arranged on described document board.

7. image read-out according to claim 6, it is characterized in that, described first position of readiness of described image fetching unit is and corresponding position, described first reference position, and described second position of readiness of described image fetching unit is the position corresponding with another edge of original copy, this original copy stops, so that an edge of original copy is aimed at described first reference position.

8. image read-out according to claim 1, it is characterized in that, described first position of readiness of described image fetching unit is and the corresponding position of described first image reading position, and described second position of readiness of described image fetching unit is and the corresponding position of described second image reading position.

9. image read-out according to claim 1, it is characterized in that, when described image fetching unit read the original copy that stops at described first image reading position, the scanning direction of described image fetching unit was identical with the scanning direction of described image fetching unit when described image fetching unit reads the original copy that stops at described second image reading position.

10. image processing system, it comprises:

Image read-out according to claim 1 is used to read the image of original copy; And

Image forming part is used for forming image based on the image of the original copy that is read by described image read-out.

11. an image read-out, it comprises:

The original copy stack portion is placed original copy thereon;

Feeding portion is used for feeding and is placed on original copy on the described original copy stack portion, with distolateral be transported to described document board on of original copy from document board;

Carry revolving member, be used on described document board, carrying original copy;

The upset delivery section, being used to overturn is transported to the front and back of another distolateral original copy of described document board by described conveying revolving member, and is transported on the described document board from another distolateral original copy that will overturn;

Image fetching unit is used for reading the image that stops at the original copy on the described document board when moving;

Control part is used to control the driving of described conveying revolving member,

It is characterized in that, described control part is controlled described conveying revolving member, stop at second image reading position that described document board is different from described first image reading position so that stop at first image reading position on the described document board and make from the original copy of a distolateral conveying from the original copy of another distolateral conveying by described upset delivery section by described feeding portion.

12. image read-out according to claim 11 is characterized in that, described first image reading position is this distolateral position at described document board, and described second image reading position is this another the distolateral position at described document board.

13. an image processing system, it comprises:

Image read-out according to claim 11 is used to read the image of original copy; And

Image forming part is used for forming image based on the image of the original copy that is read by described image read-out.

Images