JP3655078B2 - Document separation feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an original separating and feeding apparatus, and more particularly, is located between a pickup roller and a separating roller and moves to a closing position and a retracted position so that the leading edge of the original is set when the original is set on the original table. The present invention relates to a document separating and feeding apparatus that arranges and moves a shutter that enables conveyance of a document to a separation roller at a low cost with a simple structure.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a facsimile machine, a copying machine, etc., a document table on which a plurality of documents to be read are set and a plurality of documents set on the document table are separated one by one and conveyed to a document reading unit. A document separating and feeding device.
[0003]
Such a document separating and feeding apparatus is conventionally configured as shown in FIG. In other words, the document separating / feeding device 1 is provided with a pickup roller 4 below a document table 3 on which a plurality of documents 2 are placed. The roller 5 and the reverse roller 6 are disposed so as to be substantially in contact with each other. When the recording paper 2 is set on the document table 3, the pickup roller 4 is lowered below the document table 3 with the separation roller 5 as a fulcrum and is not in contact with the document 2 set on the document table 3. When the document is conveyed, it is rotated counterclockwise in synchronization with the rotation of the separation roller 5 rotated in the counterclockwise direction indicated by the arrow in FIG. The original 2 is fed in the direction of the separation roller 5.
[0004]
During document conveyance, the separation roller 5 is driven to rotate counterclockwise as indicated by an arrow in FIG. 10 by a driving mechanism (not shown), and the reverse roller 6 is driven to rotate counterclockwise as indicated by an arrow in FIG. Then, the documents 2 sent out from the document table 3 by the pickup roller 4 are separated one by one and conveyed to the conveying roller pair 7.
[0005]
The conveying roller pair 7 conveys the conveyed document 2 to the contact image sensor 8, and a pressing roller 9 is disposed at the reading position of the contact image sensor 8. The pressing roller 9 transports the conveyed document 2 to the paper discharge roller pair 10 while pressing the document 2 against the contact image sensor 8, and the contact image sensor 8 scans the document 2 transported by the pressing roller 9. The image of the original 2 is read.
[0006]
The paper discharge roller pair 10 is rotationally driven by a drive mechanism (not shown), and discharges the document 2 on which an image has been read onto a paper discharge tray (not shown).
[0007]
A shutter 11 is disposed between the pickup roller 4 and the separation roller 5, and the shutter 11 has a closing position where the tip abuts on the document table 3 with a predetermined amount centered on the fulcrum 12 and a predetermined amount. It is attached so as to be rotatable between the retracted position moved upward. The shutter 11 is rotationally driven by an electromagnetic solenoid (not shown), and when the document 2 is set on the document table 3, the electromagnetic solenoid is turned off, and the shutter 11 is closed with its tip abutting on the document table 3. The leading end of the document 2 set on the document table 3 is in contact with the shutter 11 so that it is not pushed into the separation roller 5 portion. Further, when the document is transported, the shutter 11 is turned on by an electromagnetic solenoid and rotated upward by a predetermined amount about the fulcrum 12 to be located at a retracted position. The pickup roller 4 separates the document 2 on the document table 3 by the pickup roller 4. 5 can be conveyed.
[0008]
[Problems to be solved by the invention]
However, in such a conventional document separating and feeding apparatus, since the shutter is rotated by an electromagnetic solenoid, the electromagnetic solenoid and a control system (control circuit and control software) for controlling the driving of the electromagnetic solenoid are used. ), The number of parts is large, and the document separating and feeding apparatus is large and expensive.
[0009]
Therefore, the invention according to claim 1 arranges the front end of the document set on the document table at the closed position between the pickup roller and the separation roller when setting the document on the document table, When transporting a document on the document table, a shutter that moves to a retracted position separated from the document table to enable document transport is placed between the closed position and the retracted position with the rotation axis of the reverse roller as the fulcrum. Attached so as to be rotatable, and reverse roller by means of transmission Axis of rotation Is transmitted to the shutter and rotated between the closed position and the retracted position, so that the electromagnetic solenoid conventionally used to drive the shutter and the drive control system of the electromagnetic solenoid are deleted, and the number of parts is reduced. An object of the present invention is to provide a small document separating and feeding apparatus that is simple in structure and inexpensive.
[0010]
According to the second aspect of the present invention, the shutter has an inclined surface in which a portion where the leading edge of the document set on the document table abuts is inclined at a predetermined angle in the document conveyance direction from the side away from the document table toward the document table. In addition to improving the separation performance of the document by the separation roller and the reverse roller, the tips of a plurality of documents set on the document table are sharpened in a wedge shape toward the separation roller. An object of the present invention is to provide a small-sized document separating and feeding apparatus that is simple, inexpensive, and has a structure that can improve operability during document setting.
[0011]
According to a third aspect of the present invention, the reverse roller is provided when the transmission means rotates at least the shutter from the closed position to the retracted position. Axis of rotation The rotation of the document is delayed by a predetermined delay time and transmitted to the shutter, whereby the leading edge of the document sent in the direction of the separation roller by the pickup roller during document conveyance is adjusted by the shutter rotated by being delayed, and the separation roller An object of the present invention is to provide a small-sized document separating and feeding apparatus that is simple, inexpensive, and has a structure that can improve the separation performance of the document by the reverse roller and the operability during document setting.
[0012]
According to a fourth aspect of the present invention, the shutter is provided with an arm portion that is rotatably attached to the rotation shaft of the reverse roller, and the transmission means is a spring clutch that is attached to the rotation shaft of the reverse roller and has a claw portion. And a connecting portion formed in the vicinity of the mounting position of the arm portion of the shutter to the rotating shaft of the reverse roller and formed with a groove portion into which the pawl portion of the spring clutch is inserted, and the spring clutch of the rotating shaft of the reverse roller By rotating with the rotation, the claw portion inserted into the groove portion engages with the connecting portion to rotate the shutter between the closed position and the retracted position, thereby further simplifying the transmission means. Another object of the present invention is to provide a small original separating and feeding apparatus that is simpler and less expensive in structure.
[0013]
According to a fifth aspect of the present invention, the groove portion of the connecting portion is formed in a size having a predetermined amount larger than the width of the claw portion, and the claw portion moves a predetermined amount within the groove portion, and the reverse roller rotates. By transmitting the rotation of the shaft to the shutter after delaying a predetermined delay time, the front end of the document sent in the direction of the separation roller by the pickup roller during document transport is delayed and rotated with a simpler structure. Provides a small document separation and feeding device that is simpler, cheaper and more compact in structure, which can be adjusted by a shutter to improve the separation performance of the document by the separation roller and the reverse roller, and improve the operability during document setting. The purpose is to do.
[0014]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a document separating / feeding device that feeds a plurality of documents placed on a document table between a separation roller and a reverse roller by a pickup roller, and rotates the document in a document conveying direction. The originals fed by the pickup roller are separated one by one by a reverse roller that is rotated in the direction opposite to the original conveying direction and conveyed to the original reading unit, and the original is set on the original table. In this case, the leading edge of the document set on the document table is arranged at a closed position between the pickup roller and the separation roller, and the document table is transported when the document is transported on the document table. In the document separating and feeding apparatus including a shutter that moves to a retracted position separated from the top and enables the document to be conveyed, the shutter includes the reverse roller The rotation axis together with the pivotally mounted and the retracted position and the closed position as a fulcrum to the rotary shaft, the reverse roller by a predetermined transmitting means Axis of rotation The above-mentioned object is achieved by transmitting the rotation of the motor to the closed position and the retracted position.
[0015]
According to the above configuration, when setting the document on the document table, the leading edge of the document set on the document table is arranged at the closed position between the pickup roller and the separation roller, When transporting a document, a shutter that moves to a retracted position separated from the document table and enables the transport of the document can be rotated to a closed position and a retracted position with the rotation shaft of the reverse roller as a fulcrum. At the same time, the rotation of the reverse roller is transmitted to the shutter by the transmission means and is rotated between the closed position and the retracted position, so that the electromagnetic solenoid conventionally used for driving the shutter and the drive control of the electromagnetic solenoid By deleting the system, the number of parts can be reduced, and the document separating and feeding apparatus can be made simple, inexpensive, and compact.
[0016]
In this case, for example, as described in claim 2, the shutter has a portion where the tip of the document set on the document table abuts from the side away from the document table toward the document table. And an inclined surface inclined at a predetermined angle in the document conveying direction.
[0017]
According to the above configuration, the portion of the shutter that contacts the leading edge of the document set on the document table has an inclined surface that is inclined at a predetermined angle in the document conveyance direction from the side away from the document table toward the document table. As a result, it is possible to adjust the tip of multiple documents set on the document table into a wedge shape that is pointed toward the separation roller, and to improve document separation performance by the separation roller and reverse roller. In addition, the manuscript separating / feeding device has good operability when setting the manuscript, and the structure is simple, inexpensive and small.
[0018]
Further, for example, as described in claim 3, the transmission unit includes at least the reverse roller when rotating the shutter from the closed position to the retracted position. Axis of rotation The rotation may be delayed by a predetermined delay time and transmitted to the shutter.
[0019]
According to the above configuration, since the transmission means transmits at least the delay time of the reverse roller to the shutter when the shutter is rotated from the closed position to the retracted position, it is transmitted to the shutter during document transportation. The leading edge of the document fed in the direction of the separation roller by the roller can be adjusted by a shutter that is rotated while being delayed, the separation performance of the document by the separation roller and the reverse roller can be improved, and the document separation and feeding device The operability during document setting is good, the structure is simple, inexpensive and small.
[0020]
Further, for example, as described in claim 4, the shutter includes an arm portion rotatably attached to the rotation shaft of the reverse roller, and the transmission unit is attached to the rotation shaft of the reverse roller. A spring clutch having a pawl portion, and a connecting portion formed in the vicinity of a position where the arm portion of the shutter is attached to the rotating shaft of the reverse roller and into which the pawl portion of the spring clutch is inserted. And the spring clutch rotates with the rotation of the rotating shaft of the reverse roller, and the claw portion inserted in the groove portion engages with the connecting portion to move the shutter to the closed position. It may be rotated to the retracted position.
[0021]
According to the above configuration, the shutter is provided with an arm portion that is rotatably attached to the rotation shaft of the reverse roller, and the transmission means is a spring clutch that is attached to the rotation shaft of the reverse roller and has a claw portion; A connecting portion formed in the vicinity of the position where the arm portion of the shutter is attached to the rotating shaft of the reverse roller and formed with a groove portion into which the claw portion of the spring clutch is inserted, and the spring clutch rotates the rotating shaft of the reverse roller. Accordingly, the claw portion inserted into the groove portion engages with the connecting portion to rotate the shutter between the closed position and the retracted position, so that the transmission means can have a simpler structure. In addition, the original separating / feeding apparatus can be made simpler, cheaper and smaller in size.
[0022]
For example, as described in claim 5, the groove portion of the connecting portion is formed in a size having a predetermined amount larger than the width of the claw portion, and the claw portion is located in the groove portion. A fixed amount of movement may be performed, and the rotation of the rotation shaft of the reverse roller may be delayed by a predetermined delay time and transmitted to the shutter.
[0023]
According to the above configuration, the groove portion of the connecting portion is formed in a size having a predetermined amount larger than the width of the claw portion, and the claw portion moves a predetermined amount within the groove portion, so that the rotation shaft of the reverse roller is rotated. Since the rotation is delayed by a predetermined delay time and transmitted to the shutter, the shutter rotates with a simpler structure, with the leading edge of the document sent in the direction of the separation roller by the pickup roller during document conveyance being delayed. The separation performance of the document by the separation roller and the reverse roller can be improved, the operability of the document separation / feeding device is good at the time of document setting, and the structure is simpler, cheaper and more compact. Can be.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. The embodiments described below are preferred embodiments of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. As long as there is no description which limits, it is not restricted to these aspects.
[0025]
1 to 3 are diagrams showing a first embodiment of a document separating and feeding apparatus according to the present invention. In this embodiment, a shutter is rotated by using rotation of a reverse roller. This corresponds to claims 1 and 4.
[0026]
FIG. 1 is a front sectional view of an essential part of an original reading apparatus 20 to which the first embodiment of the original separating and feeding apparatus of the present invention is applied.
[0027]
In FIG. 1, the document reading apparatus 20 has an upper cover 23 attached to an upper portion of a main body casing 21 so as to be openable and closable around a fulcrum 22. Is formed.
[0028]
A document table 25 is formed on the upper surface of the main body casing 21, and a plurality of documents 26 are set on the document table 25. A document pressing member 27 is attached to the upper cover 23 facing the document table 25, and the document pressing member 27 presses the document 26 set on the document table 25 against the document table 25.
[0029]
A pickup roller 28 is disposed below the document table 25, and the pickup roller 28 engages with the shaft center of the separation roller 29 disposed in the main body casing 21 to synchronize with the rotation of the separation roller 29. As shown in FIG. 2, it is disposed so as to be rotatable by a predetermined amount around the axis of the separation roller 29. The document table 25 is formed with a slit 25a for allowing the pickup roller 28 to protrude upward by a predetermined amount from the surface of the document table 25 when the pickup roller 28 rotates upward about the separation roller 29. When 28 is rotated upward, it contacts the back surface of the lowermost document 26 among the documents 26 set on the document table 25 through the slit 25a.
[0030]
The separation roller 29 is rotationally driven in a counterclockwise direction indicated by an arrow in FIG. 1 by a drive mechanism (not shown), and a reverse roller 30 is disposed on the upper cover 23 in a state of being in contact with the separation roller 29 above the separation roller 29. Has been. The reverse roller 30 is rotationally driven in the counterclockwise direction indicated by an arrow in FIG. 1, separates the originals 26 conveyed between the reverse rollers 30 one by one, and sets the originals 26 other than the lowermost stage on the original table 25. Send back in the direction.
[0031]
An arm portion 31a of a shutter 31 is attached to the rotating shaft 30a of the reverse roller 30. The shutter 31 includes a pair of arm portions 31a at both ends as shown in FIG. Each arm portion 31a is formed with an insertion hole 31b into which the rotating shaft 30a of the reverse roller 30 is inserted, and protrudes in a substantially ring shape around the insertion hole 31b on the outer surface of one arm portion 31a. The connecting portion 33 in which the groove portion 32 is formed is formed. A claw 34a of a spring clutch 34 to be inserted into the rotating shaft 30a of the reverse roller 30 is inserted into the groove 32 of the connecting portion 33, and the claw 34a of the spring clutch 34 is inserted into the groove 32 of the connecting portion 33 in the shutter 31. By engaging with the connecting portion 33, as the rotation shaft 30a of the reverse roller 30 rotates, between the closing position indicated by the alternate long and short dash line and the retracted position indicated by the solid line in FIG. Rotate.
[0032]
That is, the shutter 31 is attached to the rotating shaft 30a of the reverse roller 30 by inserting the insertion hole 31b of the arm portion 31a into the rotating shaft 30a of the reverse roller 30, and then the spring clutch 34 is connected to the reverse roller 30. When the claw 34a of the spring clutch 34 is inserted into the groove 32 of the connecting portion 33 of the shutter 31, the rotation shaft 30a of the reverse roller 30 can be rotated by a predetermined amount. In the state, it is attached to the rotating shaft 30 a of the reverse roller 30.
[0033]
The reverse roller 30 is rotationally driven by a motor (not shown) via a gear mechanism 35. The spring clutch 34 provided with the claw 34a and the groove portion 32 and the connecting portion 33 formed around the arm portion 31a function as transmission means as a whole.
[0034]
Therefore, when the reverse roller 30 is driven to rotate counterclockwise during document conveyance, the claw 34a of the spring clutch 34 inserted into the rotating shaft 30a engages with the groove portion 32 of the connecting portion, and the shutter 31 is moved upward. That is, the reverse roller 30 is rotated in the clockwise direction away from the document table 25 and the conveyance of the document 26 is completed. The reverse roller 30 is rotated in the clockwise direction, and the spring clutch 34 is rotated in accordance with the clockwise rotation of the reverse roller 30. The upward biasing of the shutter 31 by the claw 34a is released, and the shutter 31 is rotated downward, that is, toward the closing position in contact with the document table 25.
[0035]
1 and 2 again, the document reading device 20 is provided with a conveyance roller pair 36 on the downstream side of the separation roller 29 in the document conveyance direction, that is, on the left side of the separation roller 29 in FIGS. A contact image sensor 37 is disposed further downstream of the pair of conveying rollers 36 in the document conveying direction. The conveyance roller pair 36 conveys the original document 26 separated and conveyed one by one by the separation roller 29 and the reverse roller 30 to the contact image sensor 37, and a pressing roller 38 is provided above the contact image sensor 37. It is arranged. The pressing roller 38 is driven to rotate clockwise by a driving mechanism (not shown), and conveys the conveyed document 26 while pressing it against the reading position of the contact image sensor 37. The document reading apparatus 20 is provided with a pair of discharge rollers 39 on the downstream side in the document conveyance direction of the contact image sensor 37. The pair of discharge rollers 39 reads the document 26 that has been read by the contact image sensor 37. Then, it is discharged onto a paper discharge tray (not shown).
[0036]
Next, the operation of the present embodiment will be described. In the document reading apparatus 20, the shutter 31 has an arm portion 31a supported by the rotation shaft 30a of the reverse roller 30 and a rotation shaft of the reverse roller 30 in the groove portion 32 of the connecting portion 33 formed on the arm portion 31a. The claw 34a of the spring clutch 34 inserted into 30a is engaged.
[0037]
Accordingly, when the reverse roller 30 is not driven to rotate or when the document 26 is set on the document table 25, the shutter 31 has a lower end surface (surface on the document table 25 side) as shown in FIG. The front end of the document 26 set on the document table 25 contacts the shutter 31 so that the front end of the document 26 is aligned and the document 26 is reverse to the separation roller 29. Intrusion between the rollers 30 is prevented.
[0038]
As described above, when a plurality of documents 26 are set on the document table 25 and a key operation for instructing start of reading of the document 26 is performed by a key operation of an operation display unit (not shown), the document reading device 20 When the separation roller 29 and the reverse roller 30 are rotationally driven in the counterclockwise direction, and the conveyance roller pair 36, the pressing roller 38, and the paper discharge roller pair 39 are rotationally driven, the separation roller 29 is rotationally driven in the counterclockwise direction. As shown by the solid line in FIG. 2, the pickup roller 28 rotates upward about the separation roller 29 to contact the lowermost document 26 of the document 26 on the document table 25 and rotate counterclockwise. Then, the lowermost document 26 is sent in the direction of the separation roller 29.
[0039]
At this time, the shutter 31 rotates upward about the rotation shaft 30a of the reverse roller 30 as the reverse roller 30 rotates, and changes from the closed position indicated by the alternate long and short dash line to the retracted position indicated by the solid line in FIG. The original 26 that has been moved by the pickup roller 28 can be moved to the separation roller 29.
[0040]
That is, when the reverse roller 30 is driven to rotate counterclockwise, the claw 34a of the spring clutch 34 inserted into the rotating shaft 30a is engaged with the groove portion 32 of the connecting portion, and the shutter 31 is centered on the rotating shaft 30a. Is rotated upward, that is, in a direction away from the document table 25.
[0041]
The separation roller 29 and the reverse roller 30 separate the originals 25 sent out by the pickup roller 28 one by one and convey them to the conveyance roller pair 36. The conveyance roller pair 36 adheres the conveyed original document 26 to the close contact type. It is conveyed between the image sensor 37 and the pressing roller 38. The pressing roller 38 conveys the document 26 conveyed by the conveying roller pair 36 to the contact-type image sensor 37 and conveys it to the paper discharge roller pair 39. The contact-type image sensor 37 transfers the image of the conveyed document 26. read.
[0042]
The paper discharge roller pair 39 discharges the document 26 that has been read onto a paper discharge tray (not shown).
[0043]
When the conveyance of all the documents 26 on the document table 25 is completed, the document reading device 20 causes the leading edge of the document 26 to contact the shutter 31 when the document 26 is next set on the document table 25. Then, the reverse roller 30 is rotated by a predetermined amount in the clockwise direction, which is opposite to the direction in which the document is conveyed, and the shutter 31 is rotated downward from the retracted position, so that the front end of the shutter 31 is brought into the closed position where it contacts the document table 25. Move.
[0044]
As described above, the document reading apparatus 20 according to the present embodiment is positioned at the closed position between the pickup roller 28 and the separation roller 29 when the document 26 is set on the document table 25. When the document 26 set on the document table 25 is aligned, and the document 26 is conveyed on the document table 25, the reverse roller 30 is provided with a shutter 31 that moves to a retracted position separated from the document table 25 and enables the document 26 to be conveyed. The rotating shaft 30a is pivotally attached to the closed position and the retracted position with the rotating shaft 30a as a fulcrum, and the rotation of the reverse roller 30 is transmitted to the shutter 31 to rotate to the closed position and the retracted position. . Therefore, the electromagnetic solenoid conventionally used for driving the shutter and the drive control system of the electromagnetic solenoid can be deleted, the number of parts can be reduced, and the document reading apparatus 20 is simple, inexpensive, and compact. Can be.
[0045]
In addition, the document reading apparatus 20 includes an arm portion 31 a that is rotatably attached to the rotation shaft 30 a of the reverse roller 30, and a transmission unit that transmits the rotation of the reverse roller 30 to the shutter 31. A spring clutch 34 having a claw portion 34a attached to the rotation shaft 30a of the reverse roller 30 and a claw portion 34a of the spring clutch 34 provided in the vicinity of the attachment position of the arm portion 31a of the shutter 31 to the rotation shaft 30a of the reverse roller 30. A connecting portion 33 formed with a groove portion 32 to be inserted, and the spring clutch 34 rotates with the rotation of the rotating shaft 30a of the reverse roller 30 so that the claw portion 34a inserted into the groove portion 32 is connected to the connecting portion 33. 33 is engaged to rotate the shutter 31 between the closed position and the retracted position. Therefore, the transmission means can be made simpler, and the document reading device 20 can be made simpler, cheaper and smaller in size.
[0046]
FIGS. 4 and 5 are views showing a second embodiment of the original separating and feeding apparatus according to the present invention. In the present embodiment, the original abutment of a shutter that is rotated by utilizing the rotation of a reverse roller. The surface is an inclined surface and corresponds to claims 2 and 4.
[0047]
The present embodiment is applied to a document reading apparatus similar to the document reading apparatus of the first embodiment, and in the description of the present embodiment, the same as the first embodiment. The same reference numerals are given to the components, and the detailed description thereof is omitted.
[0048]
FIG. 4 is a front cross-sectional view of the main part of the original reading apparatus 50 to which the second embodiment of the original separating and feeding apparatus of the present invention is applied, and FIG. It is principal part front sectional drawing at the time.
[0049]
4 and 5, in the document reading device 50, a shutter 51 is rotatably attached to a rotating shaft 30a of the reverse roller 30, and the shutter 51 includes a pair of arm portions 51a. The arm portion 51a has an insertion hole (not shown), similar to the arm portion 31a of the shutter 31 of the first embodiment, and the insertion hole is inserted into the rotating shaft 30a of the reverse roller 30 so that the reverse roller 30 The rotary shaft 30a is rotatably attached. As in the shutter 31 of the first embodiment, a connecting portion having a groove is formed in the insertion hole portion of the arm portion 51a of the shutter 51, and the rotating shaft of the reverse roller 30 is formed in the groove of the connecting portion. The claw 34 a of the spring clutch 34 inserted into 30 a is inserted, and the shutter 51 is rotated to the closed position and the retracted position by the rotation of the reverse roller 30.
[0050]
The shutter 51 is formed on an inclined surface whose front end portion 51b on the side of the original plate 25 is bent at a predetermined angle in the original conveying direction and inclined at a predetermined angle in the original conveying direction.
[0051]
Next, the operation of the present embodiment will be described. In the document reading device 50, when the document is set, the shutter 51 is located at a closed position where the tip of the leading end portion 51b abuts the document table 25. In this state, a plurality of documents 26 are placed on the document table 25. When the document 26 is set, the leading edge of the document 26 comes into contact with the shutter 51 and the leading edges are aligned.
[0052]
At this time, since the front end portion 51b of the shutter 51 is bent at a predetermined angle in the document conveyance direction and inclined at a predetermined angle in the document conveyance direction, a plurality of documents in contact with the front end portion 51b of the shutter 51 is formed. The leading edge of the document 26 is aligned along the inclined surface of the shutter 51, and the document 26 closer to the document table 25, that is, the document 26 on the lower side is aligned in a wedge shape protruding toward the separation roller 29.
[0053]
After that, the document reading device 50 drives each roller when a document reading instruction operation is performed by a key operation on the operation display unit, and when the separation roller 29 is driven, as shown in FIG. Rotates upward, and rotates to feed the document 26 on the document table 25 toward the separation roller 29 and the reverse roller 30. When the separation roller rotates, the shutter 51 rotates upward about the rotation shaft 30a of the reverse roller 30 as the reverse roller 30 rotates, and moves from the closed position to the retracted position. It is possible to move the document 26 sent out by 28 to the separation roller 29.
[0054]
At this time, the lowermost document 26 on the document table 25 is sent out in the direction of the separation roller 29 by the rotation of the pickup roller 28, and the upper document 26 is moved along with the movement of the lowermost document 26 in the direction of the separation roller 29. The document 26 is also moved in the direction of the separation roller 29 while maintaining the wedge shape, and is appropriately separated one by one by the separation roller 29 and the reverse roller 30, so that the pair of conveyance rollers It is conveyed to 36.
[0055]
Therefore, the front ends of the plurality of documents 26 on the document table 25 can be formed in a wedge shape, and the documents 26 are more appropriately separated one by one by the separation roller 29 and the reverse roller 30 and conveyed. Thus, the double feeding of the document 26 can be prevented more appropriately.
[0056]
FIGS. 6 to 9 are views showing a third embodiment of the original separating and feeding apparatus according to the present invention. In this embodiment, a shutter that is rotated by utilizing the rotation of a reverse roller is provided with a reverse roller. And is rotated in a state delayed by a predetermined amount, corresponding to claims 3 and 5.
[0057]
The present embodiment is applied to a document reading apparatus similar to the document reading apparatus of the first embodiment, and in the description of the present embodiment, the same as the first embodiment. The same reference numerals are given to the components, and the detailed description thereof is omitted.
[0058]
FIG. 6 is a front cross-sectional view of the main part of the original reading apparatus 60 to which the third embodiment of the original separating / feeding apparatus according to the present invention is applied when the original is set.
[0059]
In FIG. 6, a document reading device 60 has a shutter 61 rotatably attached to a rotating shaft 30a of a reverse roller 30, and the shutter 61 includes a pair of arm portions 61a as shown in FIG. . The arm portion 61a has an insertion hole 61b. The insertion hole 61b is inserted into the rotation shaft 30a of the reverse roller 30 and is rotatably attached to the rotation shaft 30a of the reverse roller 30. A connecting portion 63 having a groove 62 is formed in the insertion hole 61b portion of the arm portion 61a of the shutter 61, and the spring clutch 34 inserted into the rotating shaft 30a of the reverse roller 30 into the groove 62 of the connecting portion 63. The claw 34 a is inserted, and the shutter 61 is rotated to the closed position and the retracted position by the rotation of the reverse roller 30.
[0060]
The groove portion 62 of the connecting portion 63 is formed in a size having a predetermined angle α that is larger than the width necessary for inserting the claw 34 a of the spring clutch 34, and the claw 34 a of the spring clutch 34 is rotated by the reverse roller 30. Even if the shaft 30a is rotated along with the rotation of the shaft 30a, the shutter 61 is rotated with a delay corresponding to the magnitude of the angle α of the groove 62.
[0061]
In the shutter 61, the front end 61c on the side of the original platen 25 is bent by a predetermined angle in the original transport direction, similarly to the front end 51b of the shutter 51 in the second embodiment, and is moved in the predetermined original transport direction. It is formed on an inclined surface.
[0062]
Next, the operation of the present embodiment will be described. In the document reading device 60, when the document is set, the shutter 61 is located at the closed position where the tip of the leading end portion 61c contacts the document table 25. In this state, a plurality of documents 26 are placed on the document table 25. When the document 26 is set, the leading edge of the document 26 comes into contact with the shutter 61 and the leading edges are aligned. At this time, since the front end portion 61c of the shutter 61 is bent at a predetermined angle in the original conveying direction and is inclined at a predetermined angle in the original conveying direction, a plurality of originals in contact with the front end portion 61c of the shutter 61 is provided. The leading edge of the shutter 26 is aligned along the inclined surface of the shutter 61, and the document 26 closer to the document table 25, that is, the document 26 on the lower side is aligned in a wedge shape protruding toward the separation roller 29.
[0063]
After that, the document reading device 60 drives each roller when a document reading instruction operation is performed by a key operation on the operation display unit, and when the separation roller 29 is driven, as shown in FIG. Rotates upward and tries to feed the document 26 on the document table 25 toward the separation roller 29 and the reverse roller 30.
[0064]
However, as shown in FIG. 7, the groove portion 62 of the connecting portion 63 of the shutter 61 is formed with an angle α having a predetermined size, so that the rotating shaft 30 a of the reverse roller 30 rotates, Even if the spring clutch 34 rotates with the rotation of the rotating shaft 30 a, the claw portion 34 a of the spring clutch 34 inserted into the groove portion 62 engages with the connecting portion 63, and the shutter 61 is connected via the connecting portion 63. A predetermined delay time occurs until the is rotated.
[0065]
Within this delay time, as shown in FIG. 8, the shutter 61 is in a state in which the front end portion 61 c is in contact with the document table 25, and is sent out toward the separation roller 29 by the rotation of the pickup roller 28. The document 26 on the document table 25 abuts on the inclined front end portion 61 c of the shutter 61, and the front end of the original document 26 is formed into a wedge shape by the inclined front end portion 61 c of the shutter 61.
[0066]
Thereafter, after a delay time corresponding to the angle α of the groove portion 62 has elapsed, the shutter 61 rotates upward to the retracted position as shown in FIG. 9 as the rotation shaft 30a of the reverse roller 30 rotates. The original 26 is moved in the direction of the separation roller 29 by the pickup roller 28. The original 26 is moved in the direction of the separation roller 29 while maintaining the wedge shape, and is separated by the separation roller 29 and the reverse roller 30. The sheets are appropriately separated one by one and conveyed to the conveyance roller pair 36.
[0067]
Accordingly, the tip portions of the plurality of documents 26 on the document table 25 can be appropriately formed in a wedge shape by the inclined tip portions 61c of the shutter 61 that rotates upward with a delay from the rotation of the pickup roller 28. In addition, the document 26 can be separated and transported more appropriately one by one by the separation roller 29 and the reverse roller 30, and double feeding of the document 26 can be more appropriately prevented.
[0068]
The invention made by the present inventor has been specifically described based on the preferred embodiments. However, the present invention is not limited to the above, and various modifications can be made without departing from the scope of the invention. Needless to say.
[0069]
【The invention's effect】
According to the document separating and feeding apparatus of the first aspect of the invention, when the document is set on the document table, the document is set on the document table at the closed position between the pickup roller and the separation roller. The front end of the document is arranged, and when the document is transported on the document table, the shutter that moves to a retracted position separated from the document table and enables the document to be transported is closed with the rotation shaft of the reverse roller as the fulcrum. It is attached to the position and the retracted position so that it can be rotated, and the reverse roller by the transmission means Axis of rotation Since the rotation of the electromagnetic solenoid is transmitted to the shutter and rotated to the closed position and the retracted position, the electromagnetic solenoid used to drive the shutter and the drive control system of the electromagnetic solenoid are deleted, and the number of parts is reduced. The document separating and feeding apparatus can be made simple, inexpensive and small in size.
[0070]
According to the document separating / feeding device of the second aspect of the invention, the portion of the shutter that contacts the leading edge of the document set on the document table is conveyed from the side away from the document table toward the document table. Since it has an inclined surface that is inclined at a predetermined angle in the direction, the tip of a plurality of documents set on the document table can be arranged in a wedge shape that is sharpened toward the separation roller. The separation performance of the document by the roller can be improved, and the manuscript separation / feed apparatus can be easily operated at the time of document setting, and the structure can be simplified, inexpensive and small.
[0071]
According to the document separating and feeding apparatus of the third aspect of the invention, the reverse roller is used when the transmission means rotates at least the shutter from the closed position to the retracted position. Axis of rotation Since the rotation of the document is transmitted to the shutter with a predetermined delay time, the leading edge of the document sent out in the direction of the separation roller by the pickup roller during document conveyance can be adjusted by the shutter rotated by being delayed, The separation performance of the document by the separation roller and the reverse roller can be improved, and the document separation / feeding device has good operability when setting the document, and the structure is simple, inexpensive and small.
[0072]
According to the document separating and feeding apparatus of the fourth aspect of the present invention, the shutter is provided with the arm portion that is rotatably attached to the rotating shaft of the reverse roller, and the transmission means is attached to the rotating shaft of the reverse roller. A spring clutch having a claw portion, and a connecting portion provided in the vicinity of a position where the shutter arm portion is attached to the rotating shaft of the reverse roller and having a groove portion into which the claw portion of the spring clutch is inserted. The clutch rotates with the rotation of the rotating shaft of the reverse roller, and the claw portion inserted into the groove portion engages with the connecting portion to rotate the shutter between the closed position and the retracted position. The document separating and feeding apparatus can be made simpler, cheaper and smaller.
[0073]
According to the document separating and feeding apparatus of the fifth aspect, the groove portion of the connecting portion is formed to have a size having a predetermined amount larger than the width of the claw portion, and the claw portion is a predetermined amount within the groove portion. Since the rotation of the rotation axis of the reverse roller is delayed by a predetermined delay time and transmitted to the shutter, the structure of the document that has been sent to the separation roller by the pickup roller during document conveyance is further simplified. The leading edge can be adjusted by a delayed and rotated shutter, the separation performance of the document by the separation roller and the reverse roller can be improved, and the operability at the time of document setting of the document separation and feeding device is good. Further, the structure can be made simpler, cheaper and smaller.
[Brief description of the drawings]
FIG. 1 is a front cross-sectional view of a main part when a document is set in a document reading apparatus to which a first embodiment of a document separating and feeding apparatus according to the present invention is applied.
FIG. 2 is a front cross-sectional view of a main part of the original reading apparatus shown in FIG.
3 is an enlarged exploded perspective view of a shutter portion in FIG. 1. FIG.
FIG. 4 is a front cross-sectional view of a main part when a document is set in a document reading apparatus to which a second embodiment of a document separating and feeding apparatus according to the present invention is applied.
5 is a front cross-sectional view of a main part of the original reading apparatus shown in FIG.
FIG. 6 is a front cross-sectional view of a main part when a document is set in a document reading apparatus to which a third embodiment of a document separating and feeding apparatus according to the present invention is applied.
7 is an enlarged exploded perspective view of the shutter portion of FIG. 6. FIG.
8 is a front cross-sectional view of a main part in a state where an original is pressed against a shutter by a pickup roller of the original reading apparatus in FIG.
9 is a front cross-sectional view of a main part of the original reading apparatus shown in FIG.
FIG. 10 is a front sectional view of a main part of a conventional document separating and feeding apparatus.
[Explanation of symbols]
20 Document reader
21 Body housing
22 fulcrum
23 Top cover
24 Document transport path
25 Document platen
25a slit
26 Manuscript
27 Document holding member
28 Pickup roller
29 Separation roller
30 Reverse roller
30a Rotating shaft
31 Shutter
31a Arm part
31b Insertion hole
32 Groove
33 Connecting part
34 Spring clutch
34a nails
35 Gear mechanism
36 Transport roller pair
37 Contact type image sensor
38 Pressing roller
39 Paper discharge roller pair
50 Document reader
51 Shutter
51a Arm part
51b Tip
60 Document reader
61 Shutter
61a Arm part
61b Insertion hole
61c Tip
62 Groove
63 Connecting part

Claims (5)

A plurality of documents placed on the document table are fed between a separation roller and a reverse roller by a pickup roller, and the separation roller rotated in the document conveyance direction and the reverse roller rotated in the direction opposite to the document conveyance direction And separates the originals sent out by the pickup roller one by one and conveys them to the original reading unit. When setting the original on the original table, a gap between the pickup roller and the separation roller is set. Positioned at the closed position, the leading edge of the document set on the document table is arranged, and when the document is transported on the document table, the document is transported to a retracted position separated from the document table. In the document separating / feeding device including a shutter that enables the shutter, the shutter is closed with the rotation shaft of the reverse roller as a fulcrum. With pivotally mounted between location and said retracted position, characterized in that the rotation of the rotary shaft of the reverse roller by a predetermined transmission means is rotated and said retracted position and said closed position is transmitted Document separation feeder. The shutter has an inclined surface in which a contact portion of the leading edge of the document set on the document table is inclined at a predetermined angle in the document conveyance direction from the side away from the document table toward the document table. 2. The document separating and feeding apparatus according to claim 1, wherein The transmission means transmits at least a delay time of a rotation axis of the reverse roller to the shutter when the shutter is rotated from the closed position to the retracted position by a predetermined delay time. The document separating and feeding apparatus according to claim 1 or 2. The shutter includes an arm portion rotatably attached to the rotation shaft of the reverse roller, and the transmission means includes a spring clutch attached to the rotation shaft of the reverse roller and having a claw portion; A connecting portion provided in the vicinity of a position where the reverse roller is attached to the rotating shaft of the arm portion and formed with a groove portion into which the claw portion of the spring clutch is inserted, and the spring clutch of the reverse roller Rotating with rotation of the rotating shaft, the claw portion inserted into the groove portion engages with the connecting portion to rotate the shutter to the closed position and the retracted position. 3. A document separating and feeding apparatus according to claim 1 or 2. The groove portion of the connecting portion is formed in a size having a predetermined amount larger than the width of the claw portion, and the claw portion moves a predetermined amount within the groove portion, so that the rotation shaft of the reverse roller 5. A document separating and feeding apparatus according to claim 4, wherein the rotation is delayed by a predetermined delay time and transmitted to the shutter.

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