CN107512601B - Paper transport mechanism, automatic paper feeder and image forming apparatus - Google Patents
Paper transport mechanism, automatic paper feeder and image forming apparatus Download PDFInfo
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- CN107512601B CN107512601B CN201610422696.6A CN201610422696A CN107512601B CN 107512601 B CN107512601 B CN 107512601B CN 201610422696 A CN201610422696 A CN 201610422696A CN 107512601 B CN107512601 B CN 107512601B
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- paper
- feed direction
- paper feed
- roller
- alignment roller
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H9/00—Registering, e.g. orientating, articles; Devices therefor
- B65H9/004—Deskewing sheet by abutting against a stop, i.e. producing a buckling of the sheet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/06—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers
- B65H5/062—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers between rollers or balls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
- B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
- B65H7/06—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed
- B65H7/08—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed responsive to incorrect front register
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H9/00—Registering, e.g. orientating, articles; Devices therefor
- B65H9/004—Deskewing sheet by abutting against a stop, i.e. producing a buckling of the sheet
- B65H9/008—Deskewing sheet by abutting against a stop, i.e. producing a buckling of the sheet the stop being formed by reversing the forwarding means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/20—Location in space
- B65H2511/22—Distance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
- B65H2511/20—Location in space
- B65H2511/24—Irregularities, e.g. in orientation or skewness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2513/00—Dynamic entities; Timing aspects
- B65H2513/40—Movement
- B65H2513/41—Direction of movement
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Registering Or Overturning Sheets (AREA)
Abstract
The automatic paper feeder and image forming apparatus that the present invention provides a kind of paper transport mechanism, has the paper transport mechanism.Paper transport mechanism of the invention includes the first carrying roller (3), and paper is transported to paper feed direction；Alignment roller (2) is set to the downstream side along paper feed direction of the first carrying roller (3), carries out slant correction to paper；Second carrying roller (4) is set to the downstream side along paper feed direction of alignment roller (2), by paper towards paper feed direction or towards the reversed conveying of paper feed direction；Abnormality detection sensor (5)；It detects whether run-off the straight or paper jam；And control unit is then corrected paper along the length of paper feed direction according to paper when abnormality detection sensor (5) detects paper inclination or paper jam.
Description
Technical field
The present invention relates to the inclinations that can automatically correct paper, to improve the paper transport mechanism of working efficiency, have
The automatic paper feeder and image forming apparatus of the paper transport mechanism.
Background technique
It, at work, will by the paper transport mechanism of automatic paper feeder for general image forming apparatus
Paper (standardized writing paper with squares or lines) is transported along paper feed direction, to carry out the work such as image reading, printing.But in paper transporter
Structure by paper along paper feed direction transport when, paper it some times happens that inclination (inclination angle is larger),
In order to guarantee the quality of print image, the device in patent document 1 can be retracted paper in paper run-off the straight
To recycling pallet.But the paper for being retracted into recycling pallet needs user that paper is put back into paper feeding tray manually, thus again
Carry out the conveying to paper.
In this regard, proposing a kind of automatic paper feeder in patent document 2, can will be retired when paper run-off the straight
Paper to recycling pallet is automatically transported again, the placement to paper is carried out manually without user, thus one
Determine to improve work efficiency in degree.
However, for the automatic paper feeder of patent document 2, although it can will be retracted into the paper of recycling pallet again
It is secondary automatically to be transported, but the inclination of paper can not be corrected.When paper run-off the straight during conveying, all
It is to be transported again to recycling pallet by paper is fully retracted, therefore, also there are certain in terms of improving working efficiency
Leeway.
Patent document 1: Japanese Unexamined Patent Publication 2008-131077 bulletin.
Patent document 2: Japanese Unexamined Patent Publication 2-178066 bulletin.
Summary of the invention
The present invention has been made in view of the above-described circumstances, and an object thereof is to provide one kind to occur to during conveying
Inclined paper is automatically corrected, to improve the paper transport mechanism of working efficiency, have the paper transport mechanism
Automatic paper feeder and image forming apparatus.
In order to achieve the above objectives, paper transport mechanism of the invention includes the first carrying roller, by paper to paper feed side
To conveying；Alignment roller is set to the downstream side along paper feed direction of above-mentioned first carrying roller, carries out slant correction to paper；
Second carrying roller is set to the downstream side along paper feed direction of above-mentioned alignment roller, can by paper towards above-mentioned paper feed direction or on
State the reversed conveying of paper feed direction；Abnormality detection sensor；Its detect paper whether run-off the straight；And control unit, when above-mentioned
When abnormality detection sensor detects paper inclination, towards after the reversed conveying paper of above-mentioned paper feed direction, make paper above-mentioned
Alignment roller carries out secondary slant correction, and before completing secondary slant correction, a part of at least the above paper is located at
Paper path between above-mentioned first carrying roller and above-mentioned second carrying roller.
In paper transport mechanism of the invention, paper is detected by abnormality detection sensor whether during conveying
Run-off the straight.It when abnormality detection sensor detects run-off the straight, is controlled by control unit, in the conveying process of paper
The slant correction to paper is automatically carried out at alignment roller in the middle, without paper is fully retracted to recycling pallet, as a result,
The working efficiency of paper conveying is improved, and then improves the work effect that the images such as device (image forming apparatus) printing are formed
Rate.
Also, in paper transport mechanism of the invention, above-mentioned control unit is according to paper along the length of above-mentioned paper feed direction
To judge to carry out the position of above-mentioned slant correction.Thereby, it is possible to automatically effectively be inclined for various sizes of paper
Tiltedly correction, so as to improve carry out efficiency.
Also, in paper transport mechanism of the invention, when the abnormality detection sensor detects paper inclination, such as
Paper described in fruit along the paper feed direction length less than the first specified value, the control unit carries out control as follows, it may be assumed that towards and institute
State the reversely conveying paper of paper feed direction and after the alignment roller is corrected, continuation reversely transport the paper until
Second carrying roller is left in the front end in the paper feed direction of the paper, then transports institute towards the paper feed direction again
State paper.
In paper transport mechanism of the invention, when above-mentioned abnormality detection sensor detects paper inclination, control unit
Length of the meeting according to paper along paper feed direction is corrected paper.And when paper is provided along the length of paper feed direction less than first
Value, above-mentioned control unit make above-mentioned paper transport mechanism towards the reversed conveying paper with paper feed direction and carry out school in above-mentioned alignment roller
After just, continue reversed conveying paper until above-mentioned second carrying roller is left in the front end of paper, then again towards paper feed direction conveying paper
.Thereby, it is possible to during the conveying of paper, by towards the reversed conveying paper with paper feed direction using alignment roller come into
The slant correction gone to paper, without paper is fully retracted to recycling pallet, thus in the matter that ensure that the image to be formed
While amount, the working efficiency of device is improved.
Also, in paper transport mechanism of the invention, when the abnormality detection sensor detects paper inclination, such as
Paper described in fruit along the length of the paper feed direction is greater than first specified value and less than the second specified value, the control unit into
Row is control as follows, it may be assumed that transporting the paper towards the paper feed direction makes the rear end in the paper feed direction of paper leave institute
Alignment roller is stated, then reversely transports the paper and after the alignment roller is corrected, continues reversed conveying paper until paper
Second carrying roller is left in the front end in the paper feed direction opened, and transports the paper towards the paper feed direction again later
.
In paper transport mechanism of the invention, when above-mentioned abnormality detection sensor detects paper inclination, control unit
Length of the meeting according to paper along paper feed direction is corrected paper.And when paper is greater than above-mentioned first along the length of paper feed direction
Specified value and when less than the second specified value, above-mentioned control unit makes above-mentioned paper transport mechanism make paper towards paper feed direction conveying paper
Above-mentioned alignment roller is left in rear end, then reversed conveying paper and after the correction of above-mentioned alignment roller, continue reversed conveying paper until
Above-mentioned second carrying roller is left in the front end of paper, transports paper towards paper feed direction again later.Thereby, it is possible to the conveyings in paper
Cheng Zhong, by carrying out the slant correction to paper using alignment roller towards the reversed conveying paper with paper feed direction, without
Paper is retracted into the upstream side of the paper feed direction of above-mentioned alignment roller, thus while ensure that the quality for the image to be formed,
Improve the working efficiency of device.Further, it is possible to carry out different modes to paper respectively according to the different length of paper
Slant correction to improve the scope of application of paper transport mechanism automation, and then improves the working efficiency of device.
Also, in paper transport mechanism of the invention, when the abnormality detection sensor detects paper inclination, such as
Paper described in fruit is greater than second specified value along the length of the paper feed direction, and the control unit carries out control as follows, it may be assumed that anti-
To conveying paper until the front end in the paper feed direction of paper is located at the upstream of the paper feed direction of the alignment roller
Side is further continued for removing towards the paper feed direction then towards paper feed direction conveying paper and after the alignment roller is corrected
Send the paper.
In paper transport mechanism of the invention, when above-mentioned abnormality detection sensor detects paper inclination, control unit
Length of the meeting according to paper along paper feed direction is corrected paper.And when paper is greater than above-mentioned second along the length of paper feed direction
When specified value, above-mentioned control unit makes above-mentioned paper transport mechanism reversely transport paper until top of form is located at above-mentioned alignment roller
Then upstream side transports paper towards paper feed direction and is corrected in above-mentioned alignment roller, be further continued for transporting paper towards paper feed direction.
As a result, when the length of paper is longer, after paper to be retracted into the upstream side of alignment roller, the automatic paper conveying carried out again is simultaneously
Carry out slant correction.This way, it is not necessary to paper is fully retracted to recycling pallet, thus ensure that the quality for the image to be formed
Meanwhile improving the working efficiency of device.
Also, in paper transport mechanism of the invention, second carrying roller has crimping separating mechanism, when paper exists
After the alignment roller is corrected, the folder portion of second carrying roller is separated, is further continued for towards described in paper feed direction conveying
Paper.This way it is not necessary to which reversely for conveying paper until leaving the second carrying roller, thus, it is possible to further increase the work of paper conveying
Make efficiency.
Also, in paper transport mechanism of the invention, have in the downstream side of the alignment roller of the paper feed direction
Movable guide plate, when reversed conveying of the paper along the paper feed direction, the control unit makes the separate alignment of the movable guide plate
The gap of roller side becomes larger.In this way, during paper conveying and in the engineering for carrying out slant correction to paper, when paper passes through
When by alignment roller, above-mentioned movable guide plate can guide paper, thus be conducive to conveying and the slant correction of paper.From
And the slant correction of paper can be effectively further carried out, and paper is swimmingly transported, thus, it is possible to mode paper jams
Generation.
Also, it may be formed as including the first alignment roller such as flowering structure in paper transport mechanism of the invention,
Slant correction is carried out to paper, when transporting paper along paper feed direction, is played a role as carrying roller, when along the paper feed
When the reversed conveying paper in direction, play a role as alignment roller；Second alignment roller is set to first alignment roller
The downstream side along paper feed direction, to paper carry out slant correction, when along the paper feed direction transport paper when, as alignment
Roller and play a role, when transporting paper along the reversed direction of the paper feed, play a role as carrying roller, abnormality detection
Sensor, detection paper whether run-off the straight；And control unit, when the abnormality detection sensor detects that paper tilts
When, then according to the paper along the length of paper feed direction, slant correction is carried out to the paper.
By making paper transport mechanism be formed as above structure, when along paper feed direction and reversed conveying paper, make first
The exchange roles of alignment roller and the second alignment roller.Therefore, paper inclination can be corrected during the conveying of paper, from
And improve the efficiency of paper conveying.And it is possible to omit the setting of the second carrying roller, thus, it is possible to miniaturization of the apparatus.
Automatic paper feeder of the invention has paper transport mechanism as described above, and also has reading part, when upper
State abnormality detection sensor detect the inclined angle of paper be less than predetermined angular when, above-mentioned control unit is without above-mentioned inclination school
Positive work continues to transport paper along paper feed direction, and after above-mentioned reading part carries out image scanning, passes through above-mentioned reading part pair
The image of scanning carries out slant correction processing.
The reading part of automatic paper feeder of the invention detects that the inclined angle of paper is less than in abnormality detection sensor
When predetermined angular, slant correction processing can be carried out to the image of scanning after image scanning.From without reversely transporting paper
It opens to carry out the slant correction of paper, thus further improves the working efficiency of device.
Image forming apparatus of the invention has automatic paper feeder as described above.And paper transport method of the invention
Using paper transport mechanism as described above, with following steps: first conveying step, from the first carrying roller by paper into
The conveying of paper direction；The slant correction step of first time carries out slant correction, above-mentioned alignment roller setting to above-mentioned paper by alignment roller
In the downstream side along paper feed direction of above-mentioned first carrying roller；Detecting step, detecting above-mentioned paper by abnormality detection sensor is
No run-off the straight；And secondary slant correction step, when above-mentioned abnormality detection sensor detects that above-mentioned paper is given birth to
When inclination, towards after the above-mentioned paper of reversely conveying of above-mentioned paper feed direction, by control unit make above-mentioned paper above-mentioned alignment roller into
The secondary slant correction of row, before completing above-mentioned secondary slant correction, a part of at least the above paper is located at above-mentioned
Paper path between first carrying roller and above-mentioned second carrying roller.
According to above-mentioned each technical solution, it is capable of providing a kind of paper to run-off the straight during conveying and automatically carries out
Correction, thus the automatic paper feeder and image that improve the paper transport mechanism of working efficiency, have the paper transport mechanism
Form device.
Detailed description of the invention
Fig. 1 is the schematic diagram of the sheet conveying apparatus of embodiments of the present invention 1.
Fig. 2 is the work flow diagram of the sheet conveying apparatus of embodiment of the present invention 1.
Fig. 3 is the schematic diagram of the movable guide plate of the sheet conveying apparatus of embodiment of the present invention 1.
Fig. 4 is the schematic diagram of the sheet conveying apparatus of embodiment of the present invention 2.
Specific embodiment
Hereinafter, sheet conveying apparatus involved in the embodiments of the present invention is described in detail referring to attached drawing.
Embodiment 1
Fig. 1 shows the schematic diagram of the sheet conveying apparatus of embodiments of the present invention 1.
As shown in Figure 1, the paper transport mechanism 1 of embodiments of the present invention 1 is according to the sequence of paper feed direction mainly by giving
Paper pallet T, paper bowl G, the first carrying roller 3, alignment roller 2, the second carrying roller 4, abnormality detection sensor 5 and reading part R structure are taken
At.
Most upstream side in paper feeding tray T location paper conveyance direction, the paper transported by paper transport mechanism 1
It opens and is placed on paper feeding tray T.Paper feeding tray T voluntarily can rise or decline.When carrying out paper feeding, on paper feeding tray
It rises, paper placed thereon is enable to contact with paper bowl G is taken, to take paper bowl G to carry out crawl to paper and by paper
It is transported towards paper feed direction.At the end of paper feeding, paper feeding tray T drops to fixed position so that paper placed thereon with take
Paper bowl G separation.
Paper bowl G is taken to be located at the downstream side of paper feeding tray T in paper feed direction, and before the paper feed direction of paper pallet T
The upside at end.As described above, paper feeding tray T rises when carrying out paper feeding, the paper for taking paper bowl G and being placed on paper feeding tray T
Paper feed direction preceding end in contact.The surface of paper bowl G is taken to be coated by the material with certain coefficient of friction, such as rubber.Into
It when row paper feeding, is contacted with paper and passes through frictional force paper is grabbed, and then transport paper towards the downstream side of paper feed direction
.In addition, " front end " of above-mentioned paper and aftermentioned " rear end " refer respectively to " front end " of the paper in paper feed direction and " after
End ".
First carrying roller 3 is located at the downstream side for taking paper bowl G in paper feed direction, and the first carrying roller 3 is that up and down direction is a pair of
Roller, by take paper bowl G grab paper be further transported to the first carrying roller 3.Paper is upper by being located at for the first carrying roller 3
Clamping part between two rollers in lower direction, and then transported to the downstream side of paper feed direction.Herein, the first carrying roller 3 to by
The paper for taking paper bowl G to send carries out pickup conveying, is thus used to prevent the case where once transporting plurality of sheets of paper during paper feed.
Herein, it also can be omitted the first carrying roller 3, in this case, can make to take paper bowl G as the first carrying roller.
Alignment roller 2 is located at the downstream side of the first carrying roller 3 in paper feed direction, and identical as the first carrying roller 3, second removes
The roller for sending roller 4 to be again formed as up and down direction a pair, and make the paper aligning transported by the first carrying roller 3 (first time
Slant correction), that is, it is consistent the edge of the front end positioned at paper feed direction of paper in paper feed direction.It is carrying out being paper
When alignment, the front end of paper contacts and stops the regular hour with alignment roller, and the first carrying roller 3, which then continues to rotate, carries out paper
Conveying.Paper can arch upward and form bending between alignment roller 2 and the first carrying roller 3 as a result,.Herein, by alignment roller 2 and first
Part between carrying roller 3 is known as first and is formed by bending portion W1.First bending can alleviate paper in paper conveying later
The surface stress opened, so as to prevent paper from generating breakage due to surface.
Second carrying roller 4 is located at the downstream side of alignment roller 2 in paper feed direction, and identical as the first carrying roller 3, second removes
The roller for sending roller 4 to be again formed as up and down direction a pair, the paper transported by alignment roller 2 are further transported to the second conveying
Roller 4.Paper is by the clamping part between two rollers positioned at up and down direction of the first carrying roller 3, and then by paper feed direction
Downstream side conveying.Herein, during being described the slant correction to paper later, paper can by towards and paper feed direction phase
Anti- direction is reversed conveying, and goes out to be corrected in alignment roller 2.And at this point, as described above, paper is in the second carrying roller 4
It can also arch upward between alignment roller 2 and form bending, here, the part between alignment roller 2 and the first carrying roller 4 is known as second
It is formed by bending portion W2.
Reading part R is located at the downstream side of the second carrying roller 4 in paper feed direction.The paper moved by the second carrying roller 4
It opens and paper is read out in reading part R.Later, paper reaches contact image sensor CIS via central roll I is read
(Contact Image Sensor), CIS is read out the image at the back side of paper.Then it by reading back roller F, is sent to
Exit roller P and be discharged such as figure into the outside of device via exit roller P.In addition, being additionally provided on paper feed path multiple
Position sensor.Such as paper feed device sensor GS is equipped on the paper feed path for taking paper bowl G and the first carrying roller 3, first
The downstream side of the paper feed direction of carrying roller 3 is equipped with sensor FS after paper separation, in the upstream and downstream point of the paper feed direction of alignment roller 2
Not She You paper aligning sensor DS1 and DS2, and after reading the paper feed path between roller F and exit roller P be equipped with paper discharge
Sensor PS.Above-mentioned each sensor detect or examine the case where paper jam in the position on paper feed path to paper
It surveys.
It is provided with abnormality detection sensor 5 on paper feed path between the second carrying roller 4 and reading part R, to paper
Whether run-off the straight or paper jam are detected at this.When it detects paper run-off the straight or paper jam, to control unit (example
It is not shown such as microcomputer) send signal.Slant correction (second of slant correction) is carried out to paper by control unit.Herein, at this
In embodiment, abnormality detection sensor 5 be by calculate paper by or leave the time of sensor and judge the hair of paper jam
Raw.For example, flowing down side senser still after the sensor for being located at the upstream side of paper feed direction detects several seconds after paper
Paper is not detected, then is determined as paper jam.Paper leaves the case where sensor similarly.
Hereinafter, the case where carrying out the slant correction of paper to control unit is illustrated.
Paper transport mechanism 1 of the invention automatically can carry out slant correction to paper during the conveying of paper.
Further, it is possible to take different slant correction modes along the difference of the length of paper feed direction according to paper.Thus it further mentions
High applicability.
As described above, the paper being placed on paper feeding tray T can be one by one from paper feeding tray T when just having carried out paper feeding
Inside that is, reading part R conveying to transport mechanism.In this process, before paper will reach reading part R, abnormality detection
Sensor 5 can whether run-off the straight or situations such as paper jam, be detected to paper.And when abnormality detection sensor 5 detects exception
When, that is, it detects in the case where paper inclination or paper jam has occurred, control unit can be sent this information to, and issued by control unit
Instruction is corrected the inclination of paper.
Specifically, control unit can execute corresponding finger when such as paper inclination occurs for the detection of abnormality detection sensor 5
It enables and paper inclination is corrected.Here, different corrections can be taken according to the difference along the length of paper feed direction of paper
Mode.When starting paper feeding, the length along paper feed direction of paper can be detected by sensor (not shown), or be pressed in advance
Size (such as A4, B5 equidimension) and by various sizes of carton, thus come select various sizes of paper carry out to
Paper.And when abnormality detection sensor 5 detects the inclination of generation paper or paper jam, and if length of the paper in paper feed direction
Less than being contacted from two rollers up and down of the second carrying roller 4
Locate P4 to alignment roller 2 two roller contact position P2 up and down the distance along paper feed direction, the distance is set as the first specified value herein
D1, then control unit issues instruction, inverts the second carrying roller 4, by paper towards the reversed conveying of paper feed direction, and then is retracted into the
Two are formed by bending portion W2, are formed by bending the inclination school that portion W2 carries out using alignment roller 2 reversed (paper feed direction reversed) second
Just, i.e., slant correction is carried out by alignment roller 2 in the downstream side of alignment roller 2.That is, being carried out pair by the rear end of paper
Together.After carrying out slant correction, continue reversed conveying paper until the second carrying roller 4 is left in the front end of paper.Later, it second removes
It send roller 4 to rotate forward, the paper after slant correction will be implemented and transported again along paper feed direction.
Length by above-mentioned slant correction, according to the length in the paper feed direction of paper, in the paper feed direction of paper
It is reversed to transport paper and carried out reversely in the alignment roller 2 nearest apart from paper (paper rear end) when degree is less than the first specified value D1
Slant correction.Thereby, it is possible to the conveying processes in paper to carry out slant correction to paper, and faced according to the length of paper
Close position progress slant correction, i.e. paper rear end are closer with alignment roller 2, and thus, it is possible to further increase the speed of correction
Degree, to improve paper while guaranteeing paper conveying quality and transport efficiency.
Next, the mode of slant correction when being greater than the first specified value D1 to the length of the paper feed direction of paper is said
It is bright.
When abnormality detection sensor 5 detects to occur such as paper inclination, control unit can execute corresponding instruction to paper
Inclination is opened to be corrected.Here, when the length of the paper feed direction of paper is greater than the first specified value D1, and paper is in paper feed direction
On length be less than from the distance between 4 to the first carrying roller 3 of the second carrying roller, be more specifically from the second carrying roller 4
Upper and lower two roller contact position P4 to the first carrying roller 3 two roller contact position P3 up and down the distance along paper feed direction, herein should be away from
From the first specified value D2 is set as, when abnormality detection sensor 5 detects to occur such as paper inclination, the rear end of paper can be located at
The upstream side of the paper feed direction of alignment roller 2, such as be formed by bending in the range of portion W1 positioned at first.
And in this regard, control unit issues instruction, continuation transports paper along paper feed direction, until the rear end of paper is made to leave alignment
Roller 2 and enter and second be formed by bending portion W2, even if the rear end of paper is located at the downstream side of the paper feed direction of alignment roller 2, later, make
The reversion of second carrying roller 4 is formed by bending portion W2 second and is carried out using alignment roller 2 by paper towards the reversed conveying of paper feed direction
Reversed slant correction as described above.After carrying out slant correction, continue reversed conveying paper until paper front end from
Open the second carrying roller 4.Later, the second carrying roller 4 rotates forward, and will implement the paper after slant correction and removes again along paper feed direction
It send.
Length by above-mentioned slant correction, according to the length in the paper feed direction of paper, in the paper feed direction of paper
Degree is greater than the first specified value D1 and when less than the second specified value D2, when abnormality detection sensor 5 detects that such as paper, which occurs, to incline
When oblique, since the rear end of paper can be located at the upstream side of the paper feed direction of alignment roller 2, it need to will continue to transport along paper feed direction
Paper is carrying out reversed slant correction as described above by alignment roller 2 until the rear end of paper is made to leave alignment roller 2.
Thereby, it is possible to the conveying processes in paper to carry out slant correction to paper, and according to the length of paper in the position closed on
Slant correction is carried out, so as to further increase the speed of correction, and then paper is improved and transports efficiency.
Next, the mode of slant correction when being greater than the second specified value D2 to the length of the paper feed direction of paper is said
It is bright.
When abnormality detection sensor 5 detects to occur such as paper inclination, control unit can execute corresponding instruction to paper
Inclination is opened to be corrected.Here, when the length of the paper feed direction of paper is greater than the second specified value D2, work as abnormality detection sensor
5 detect that paper inclination has occurred, and the rear end of paper can be located at the upstream side of the paper feed direction of the first carrying roller 3.
And in this regard, control unit sending instruction, inverts the second carrying roller 4, by paper towards the reversed conveying of paper feed direction, directly
It is located at the upstream side of the paper feed direction of alignment roller 2 to the front end of paper, even if the front end of paper, which is in first, is formed by bending portion W1
In the range of.Make the second carrying roller 4 again just then transport paper towards paper feed direction, is formed by bending portion W1 first and utilizes alignment roller
2 carry out the slant correction of positive (paper feed direction), i.e., carry out slant correction by alignment roller 2 in the upstream side of alignment roller 2.Also
It is to say, is aligned by the front end of paper.The paper after slant correction will be implemented later to transport along paper feed direction.
Length by above-mentioned slant correction, according to the length in the paper feed direction of paper, in the paper feed direction of paper
When degree is greater than the second specified value D2, in order not to make before paper arrival reading part R to carry out that correction please be explain in detail, therefore paper is carried out
Reversed conveying and make the front end of paper be located at alignment roller 2 paper feed direction upstream side, then positive transport paper and in alignment roller 2
Place carries out positive slant correction.Thereby, it is possible to the conveying processes in paper to carry out slant correction to paper, to improve paper
Conveying efficiency is opened, and different slant correction modes is taken along the difference of the length of paper feed direction according to paper, thus into one
Step improves applicability.
Fig. 2 is the work flow diagram of the sheet conveying apparatus of embodiment of the present invention 1.Based on Fig. 2 to embodiment party of the present invention
The workflow of the sheet conveying apparatus 1 of formula 1 is illustrated.
As shown in Fig. 2, when just starting to carry out paper feeding, positive conveying paper (step P1) of sheet conveying apparatus 1.When paper
When abnormality detection sensor 5 is passed through in front end, abnormality detection sensor 5 detects the tilt angle (step P2) of paper.And when abnormal
Detection sensor 5 detects when the tilt angle of paper is less than threshold value (threshold value being previously set) (step P3 be "No"), then after
It is continuous to be carried out in turn in the work such as the reading of reading part R, thus the conveying work of paper along paper feed direction conveying paper (step P4)
Terminate.
And when abnormality detection sensor 5 detect paper tilt angle be greater than threshold value when (P3 is "Yes"), then need into
The slant correction of row paper.At this point, first determining whether the size of the paper feed direction of paper whether less than the first specified value D1 (step
P31), when whether the size of the paper feed direction of paper is less than the first specified value D1 (step P31 is "Yes"), then further detection
Whether there are other paper (step P32) to paper feeding mouth from portion W1 is formed by bending, if there is other paper (step P32 is "Yes"),
The first carrying roller 3 and alignment roller 2 are inverted, other paper are returned into paper feeding disk (step P33), then repeat step
P32, until from portion W1 is formed by bending to paper feeding mouth without other paper (step P32 is "No"), then it is inclined paper is reversed
It transports to second and is formed by bending portion W2 (step P34), be formed by bending portion W2 second as described above and carried out reversely using alignment roller 2
Slant correction (step P35), then positive conveying paper (step P4) to conveying work terminates.
When abnormality detection sensor 5 detect paper tilt angle be greater than threshold value when (P3 is "Yes"), and paper into
When the size in paper direction is greater than the first specified value D1 when (step P31 is "No"), then the ruler of the paper feed direction of paper is continued to test
It is very little whether less than the second specified value D2 (step P41), when the size of the paper feed direction of paper is less than the second specified value D2 (step
Rapid P41 is "Yes"), then continue positive conveying paper until alignment roller 2 (step P43) is left in the rear end of paper, reversely removes later
Paper feeding is formed by bending portion W2 second and is reversely corrected (step P44) using alignment roller 2, then positive conveying paper (step
Rapid P4) to conveying work terminate.
Abnormality detection sensor 5 detect paper tilt angle be greater than threshold value when (P3 is "Yes"), and paper into
When the size in paper direction is greater than the second specified value D2 (step P41 is "No"), then reversely paper is transported until the front end of paper is complete
Alignment roller 2 (step P51) is left entirely, then positive conveying paper is formed by bending portion W1 first and carries out forward direction using alignment roller 2
Slant correction (step P52), then positive conveying paper (step P4) to conveying work terminates.
In above step, step P41-44 or step P51-52 can also be replaced with step P32-33.
The mode for the slant correction opened is illustrated to carrying device of the invention above, and in order to further have
Effect ground carries out conveying and the slant correction of paper, crimping separated structure can be arranged in the second carrying roller 4.
As shown in Figure 1, paper is located at the second Curved when paper is when the alignment roller 2 carries out reversed slant correction
At portion, after the rear end of paper contacts with alignment roller 2 and then carries out slant correction, if the front end of paper is also by the second carrying roller 4
If clamping, then the front end of paper is possible to be in inclined state, therefore, in order to effectively carry out inclination school to paper
Just, as described above, paper is continued the reversed conveying towards paper feed direction, until the second carrying roller 4 is left in its front end.In this regard, working as
In the case where crimping separated structure is arranged in the second carrying roller 4, control unit can separate the folder portion of the second carrying roller 4, even if the
Arrow direction of two rollers up and down of two carrying rollers 4 in diagram respectively moves a certain distance, and makes two rollers separation up and down, thus
Nipped paper (front end) is discharged, so that the inclination angle of top of form be made to be corrected, is further continued for removing towards the paper feed direction
Paper feeding.In this way, without continuing afterwards to paper progress slant correction (secondary slant correction) towards the reversed of paper feed direction
Conveying paper is until the second carrying roller is left in the front end of paper.Thereby, it is possible to effectively further carry out slant correction to paper.
In addition, in order to effectively further transport paper, preferably in the upstream side and downstream side of the paper feed direction of alignment roller 2
Movable guide plate K11-K22 is respectively set.
It is shown in Fig. 3 and movable guide plate K11-K22 is respectively set in the upstream side of the paper feed direction of alignment roller 2 and downstream side
The case where.Movable guide plate K11 and K12 are located at the upstream side of the paper feed direction of alignment roller 2, and K11 is located above, and under K12 is located at
Side.Movable guide plate K21 and K22 are located at the downstream side of the paper feed direction of alignment roller 2, and K21 is located above, and K22 is located below.
When carrying out the conveying of paper, paper can be by between the movable guide plate of movable top and the movable guide plate of lower section.
And in order to guide and make paper successfully to transport to paper, when paper is transported along paper feed direction, i.e., positive conveying
When, paper passes through movable guide plate K11 and K12 first, and control unit makes the angle of the close alignment roller side of movable guide plate K11 and K12
Become smaller, and the angle of the close alignment roller side of movable guide plate K21 and K22 is made to become larger；Thus, it is possible to be guided to paper, make
Its folder portion for successfully reaching alignment roller 2, and drawn again after through alignment roller 2 by movable guide plate K21 and K22
It leads.
And when reversed conveying of the paper along paper feed direction, i.e., reversed conveying when, paper pass through first movable guide plate K21 and
K22, control unit makes the angle of the close alignment roller side of movable guide plate K21 and K22 become smaller, and makes leaning on for movable guide plate K11 and K12
The angle of nearly alignment roller side becomes larger；Thus, it is possible to guide to paper, it is made reversely successfully to reach the folder portion of alignment roller 2,
And it is guided again after through alignment roller 2 by movable guide plate K11 and K12.
Movable guide plate K11-K22 is respectively set by the upstream side and downstream side of the paper feed direction in alignment roller 2, it can
Paper is guided, conveying and the slant correction of paper are thus conducive to, and the generation of paper jam can be prevented.
The paper transport mechanism 1 of first embodiment of the invention is illustrated above, but the present invention does not limit
In above embodiment.As long as slant correction can be carried out to paper during the conveying of paper, it can be formed as
His structure.
For example, showing the schematic diagram 10 of the carrying device of present embodiment 2 in Fig. 4 as shown in Fig. 4, which omits
The setting of two carrying rollers, and roller will be sent to double as the first alignment roller 30 as first, and using the alignment roller of embodiment 1 as the
Two alignment rollers 40.Second alignment roller 40 is located at the downstream side of the paper feed direction of the first alignment roller 30, and the first alignment roller 30 and
It is to be formed by bending portion W10 between two alignment rollers 40.In addition, remaining structure is identical as the structure of embodiment 1.
In the paper transport mechanism 10 of present embodiment, when transporting paper along paper feed direction, the first alignment roller 30 is made
Play a role for carrying roller, paper by the first alignment roller 30 by the conveying towards paper feed direction, and in the second alignment roller 40
It is aligned.And when along the reversed conveying paper of paper feed direction, the first alignment roller 30 then plays a role as alignment roller, makes
The paper reversely moved carries out slant correction in the first alignment roller.
Second alignment roller 40 is set to the downstream side along paper feed direction of the first alignment roller 30, as described above, when along paper feed
When direction transports paper, play a role as alignment roller.And when along the reversed conveying paper of paper feed direction, the second alignment
Roller 40 plays a role as carrying roller, is reversely transported to paper, and makes paper in the first alignment roller 30 as described above
Carry out reversed slant correction.
Paper transport mechanism 10 according to the present embodiment makes first pair when along paper feed direction and reversed conveying paper
The exchange roles of neat roller 30 and the second alignment roller 40.Therefore, paper inclination can be corrected during the conveying of paper,
To improve the efficiency of paper conveying.And it is possible to omit the setting of the second carrying roller, thus, it is possible to miniaturization of the apparatus.
Automatic paper feeder of the invention is for example with the paper transport mechanism of any one in above embodiment.And
And in order to more effectively improve the efficiency of paper conveying, the reading part R of automatic paper feeder of the invention can be to above-mentioned inclination
It is corrected.For example, when abnormality detection sensor 5 detects that the inclined angle of paper is less than predetermined angular (threshold value), control
Portion works without above-mentioned slant correction, and be to continue with along paper feed direction transport paper, and reading part R carry out image scanning and
After the information for reading paper, slant correction processing is carried out by image of the reading part R to reading.
In this way, the reading part R of automatic paper feeder of the invention detects the inclined angle of paper in abnormality detection sensor
When degree is less than predetermined angular, slant correction processing can automatically be carried out to the image of reading after image reading.To not
Work, such as reversed conveying paper must be corrected by control unit to carry out the slant correction of paper, thus, it is possible to further
Improve the working efficiency of device.
The preferred embodiments of the present invention is illustrated above, but the present invention is not limited to above-mentioned embodiment party
Formula can be realized within the scope of its spirit by various structures.For example, for remembering in Summary
For the technical characteristic in each embodiment carried, can suitably they be replaced or be combined.In addition, in this theory
The part not being illustrated as essential features in bright book then can suitably be deleted.
Industrial availability
Paper transport mechanism according to the present invention can carry out slant correction to paper in the conveying of paper, to mention
High paper transports efficiency.It is suitable for the images such as duplicator, printer, facsimile machine and the compounding machine that has these functions to be formed
Device.Also, other than automatic paper feeder, also the present invention can be applied to other transport paths, especially paper feedings to fill
It sets.
Description of symbols
1,10: paper transport mechanism；2: alignment roller；3: the first carrying rollers；4: the second carrying rollers；5: abnormality detection sensing
Device；30: the first alignment rollers；40: the second alignment rollers；T: paper feeding tray；G: paper bowl is taken；I: central roll is read；F: back roller is read；P: row
Paper bowl；W1: the first is formed by bending portion；W2: the second is formed by bending portion；W10: it is formed by bending portion；R: reading part；GS: paper feed device
Sensor；FS: sensor after paper separation；DS1, DS2: paper aligning sensor；PS: grate paper-arranaging sensor；CIS: contact imaging
Sensor；K11-K22: movable guide plate.
Claims (11)
1. a kind of paper transport mechanism comprising:
First carrying roller transports paper to paper feed direction；
Alignment roller is set to the downstream side along paper feed direction of first carrying roller, carries out slant correction to paper；
Second carrying roller is set to the downstream side along paper feed direction of the alignment roller, can be by paper towards the paper feed direction
Or the reversed conveying of the paper feed direction；
Abnormality detection sensor；Its detect paper whether run-off the straight；And
Control unit, when the abnormality detection sensor detects paper inclination, towards the reversed conveying paper of the paper feed direction
Afterwards, the paper is made to carry out secondary slant correction in the alignment roller,
Before completing secondary slant correction, a part of at least described paper be located at first carrying roller with it is described
Paper path between second carrying roller.
2. paper transport mechanism according to claim 1, which is characterized in that
The control unit judges to carry out the position of the slant correction along the length of the paper feed direction according to paper.
3. paper transport mechanism according to claim 2, which is characterized in that
When the abnormality detection sensor detects paper inclination, if the paper is less than along the length of the paper feed direction
First specified value, the control unit carry out control as follows, it may be assumed that towards the reversely conveying paper with the paper feed direction and in institute
State after alignment roller carries out secondary slant correction, continue reversely to transport the paper until the paper it is described into
Second carrying roller is left in front end on paper direction, then transports the paper towards the paper feed direction again.
4. paper transport mechanism according to claim 2, which is characterized in that
When the abnormality detection sensor detects paper inclination, if the paper is greater than along the length of the paper feed direction
First specified value and less than the second specified value, the control unit carries out control as follows, it may be assumed that transports the paper towards the paper feed direction
Opening makes the rear end in the paper feed direction of paper leave the alignment roller, then reversely transports the paper and described right
After roller carries out secondary slant correction together, continue reversed conveying paper before paper is in the paper feed direction
Second carrying roller is left at end, transports the paper towards the paper feed direction again later.
5. paper transport mechanism according to claim 2, which is characterized in that
When the abnormality detection sensor detects paper inclination, if the paper is greater than along the length of the paper feed direction
Second specified value, the control unit carry out control as follows, it may be assumed that reversed conveying paper is until paper is in the paper feed direction
Front end is located at the upstream side of the paper feed direction of the alignment roller, then towards paper feed direction conveying paper and described right
After neat roller carries out secondary slant correction, it is further continued for transporting the paper towards the paper feed direction.
6. paper transport mechanism according to any one of claims 1-5, which is characterized in that
Second carrying roller has crimping separating mechanism, when paper carries out secondary slant correction in the alignment roller
Afterwards, the folder portion of second carrying roller is separated, is further continued for transporting the paper towards the paper feed direction.
7. paper transport mechanism according to any one of claims 1-5, which is characterized in that
There is movable guide plate in the downstream side of the alignment roller of the paper feed direction, when paper is along the reversed of the paper feed direction
When conveying, the control unit makes the gap of the separate alignment roller side of the movable guide plate become larger.
8. a kind of paper transport mechanism comprising:
First alignment roller carries out slant correction to paper, when transporting paper along paper feed direction, plays as carrying roller
Effect, when along the reversed conveying paper of the paper feed direction, plays a role as alignment roller；
Second alignment roller is set to the downstream side along paper feed direction of first alignment roller, carries out slant correction to paper,
It when transporting paper along the paper feed direction, plays a role as alignment roller, is transported when along the reversed direction of the paper feed
When paper, play a role as carrying roller,
Abnormality detection sensor, detection paper whether run-off the straight；And
Control unit, when the abnormality detection sensor detects paper inclination, towards after the reversed conveying paper of the paper feed direction,
The paper is set to carry out secondary slant correction in the alignment roller,
Before completing secondary slant correction, a part of at least described paper be located at first alignment roller with it is described
Paper path between second alignment roller.
9. a kind of image read-out, with paper transport mechanism described in any one of claim 1-8, feature exists
In,
With reading part, when the abnormality detection sensor detects that the inclined angle of paper is less than predetermined angular, the control
Portion processed works without the slant correction, continues to transport paper along the paper feed direction, and carry out image in the reading part
After scanning, processing is corrected by image of the reading part to scanning.
10. a kind of image forming apparatus, which is characterized in that
Image read-out with claim 9.
11. a kind of paper transport method, which is characterized in that have following steps:
First conveying step is transported paper to paper feed direction from the first carrying roller；
The slant correction step of first time carries out slant correction to the paper by alignment roller, and the alignment roller is set to described
The downstream side along paper feed direction of first carrying roller；
Detecting step, by abnormality detection sensor detect the paper whether run-off the straight；And
Secondary slant correction step, when the abnormality detection sensor detects the paper run-off the straight, towards described
After the reversely conveying paper of paper feed direction, the paper is set to carry out secondary inclination in the alignment roller by control unit
Correction,
Before completing secondary slant correction, a part of at least described paper be located at first carrying roller with it is described
Paper path between alignment roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610422696.6A CN107512601B (en) | 2016-06-15 | 2016-06-15 | Paper transport mechanism, automatic paper feeder and image forming apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610422696.6A CN107512601B (en) | 2016-06-15 | 2016-06-15 | Paper transport mechanism, automatic paper feeder and image forming apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107512601A CN107512601A (en) | 2017-12-26 |
| CN107512601B true CN107512601B (en) | 2019-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610422696.6A Expired - Fee Related CN107512601B (en) | 2016-06-15 | 2016-06-15 | Paper transport mechanism, automatic paper feeder and image forming apparatus |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1035953A (en) * | 1996-07-19 | 1998-02-10 | Hitachi Ltd | Skew correcting mechanism |
| CN1260276A (en) * | 1998-12-28 | 2000-07-19 | 富士通株式会社 | Paper feeder with inclined-feeding correction function and recorder thereof |
| JP2011116501A (en) * | 2009-12-03 | 2011-06-16 | Oki Electric Industry Co Ltd | Medium carrying device |
| CN102126341A (en) * | 2009-10-27 | 2011-07-20 | 海德堡印刷机械股份公司 | Apparatus for correcting the position of sheets |
| CN105645149A (en) * | 2014-11-28 | 2016-06-08 | 柯尼卡美能达株式会社 | Sheet-conveying device and image-forming apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5623461B2 (en) * | 2012-04-27 | 2014-11-12 | キヤノン株式会社 | Sheet conveying apparatus and image forming apparatus |
-
2016
- 2016-06-15 CN CN201610422696.6A patent/CN107512601B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1035953A (en) * | 1996-07-19 | 1998-02-10 | Hitachi Ltd | Skew correcting mechanism |
| CN1260276A (en) * | 1998-12-28 | 2000-07-19 | 富士通株式会社 | Paper feeder with inclined-feeding correction function and recorder thereof |
| CN102126341A (en) * | 2009-10-27 | 2011-07-20 | 海德堡印刷机械股份公司 | Apparatus for correcting the position of sheets |
| JP2011116501A (en) * | 2009-12-03 | 2011-06-16 | Oki Electric Industry Co Ltd | Medium carrying device |
| CN105645149A (en) * | 2014-11-28 | 2016-06-08 | 柯尼卡美能达株式会社 | Sheet-conveying device and image-forming apparatus |
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| Publication number | Publication date |
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| CN107512601A (en) | 2017-12-26 |
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