JPH04308132A - Sheet material feeding device - Google Patents

Abstract

PURPOSE:To prevent a preliminary conveying roller feeding a sheet material to a separating roller from hindering the insertion of the sheet material into a set. CONSTITUTION:When the inserting speed of a document into a document base 20 is faster than the rotating speed of a preliminary conveying roller 1, the supporting means 6 of the preliminary conveying roller 1 is rotated, and the preliminary conveying roller 1 is lowered. When a document is fed by a conveying roller 25 on the downstream side and a separating roller 10 is interlockingly rotated, the preliminary conveying roller 1 is lowered. A belt 13 serving as a transmitting means is loosened, and the supporting means 6 is rotated.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet material feeding device, and more particularly, to a document feeding device for a facsimile machine or a copying machine that separates and conveys a plurality of original documents one by one.

0002

[Prior Art] In conventional technology, the position of the rotation axis of the preliminary conveyance roller is fixed, and since the preliminary conveyance roller has an elliptical or triangular shape, it moves out and retracts from the document table when rotated. .

[0003] Furthermore, the mechanism for moving the preliminary conveyance roller up and down is controlled by an electric signal using a plunger or an electromagnetic clutch.

0004

[Problem to be Solved by the Invention] However, in the case of oval or triangular preliminary conveyance rollers, the roller moves out and retracts from the document table during paper feeding, so the conveyance force may or may not be applied. It takes time and the effect on the separation means is not stable, leading to paper feeding failures such as double feeding or non-feeding.

[0005] Furthermore, a mechanism using a plunger or an electromagnetic clutch and controlled by an electric signal has the disadvantage that it is costly and the mechanism becomes large.

[0006]

[Means for Solving the Problems] According to the present invention, there is provided a rotating body mechanism driven by a supporting member that supports a pre-conveying rotating body and a rotating shaft and also rotates with its own rotating shaft, and a rotating body mechanism that is driven by a driving means. and, and utilizes the fact that the supporting member rotates to move above and below the preliminary conveying table, thereby stabilizing the influence of the preliminary conveying force on the separating means without any complicated control. This is what I did.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 are cross-sectional and plan views of an apparatus that best illustrates the invention. 1 is a preliminary conveyance roller; 2 is a preliminary conveyance pulley connected to the preliminary conveyance roller 1 on the same axis;
3 is a preliminary conveyance roller shaft, 4 is a pulley that is not on the same axis as the preliminary conveyance roller, 5 is a rotation axis of pulley 4, and 6 is a support member that supports the preliminary conveyance roller shaft 3 and rotation shaft 5 and rotates itself at the same time. , 7 is a support member axis that is the rotation axis of the support member 6, 8 is a normal rotation stopper that restricts the rotation of the support member 6 in the normal rotation direction (counterclockwise in FIG. 1), and 9 is the reverse rotation direction (counterclockwise in FIG. 1) of the support member 6. 10 is a separation roller, 11 is a separation shaft that is the rotation axis of the separation roller, 12 is a drive pulley coupled on the same axis as the separation shaft 11, 13 is a drive 14 is a drive motor that provides drive to the conveyance system; 15 is a transmission gear that transmits the drive from the drive motor 14; 16 is a separation gear that meshes with the transmission gear 15 and is coaxial with the separation shaft 11; 17 is a separation gear 1;
6 is a spring clutch that transmits drive to the separation roller 10 and separation shaft 11 when rotating in the direction A shown in FIG. 1, and disengages the drive when rotating in the direction B.

Reference numeral 19 denotes an original, 20 an original table for placing the original 19, 21 an original presence/absence sensor for detecting that the original 19 is set on the original table 20, and 22 an original for pressing the original 19 against the preliminary transport roller 1. 23 is a separation member that separates the plurality of originals 19 one by one; 24 is a cue sensor that detects the leading edge of the separated originals 19; 25 is the original 1
9 is a transport roller that transports the document 1, and 26 is the transported original 1.
9 is a reading unit that reads the image, 27 is the read original 19
This is a paper ejection roller that ejects paper.

FIG. 3 is a block diagram showing the control of the present invention. In the figure, 28 is a control unit of a facsimile machine or the like having a document feeding device according to the present invention, and the control unit 28 controls the drive motor 14, the document presence/absence sensor 21, the cue sensor 24, and the reading unit 26. ing. Note that in this embodiment, all of the conveyance systems are driven by one drive motor 14.

Next, the operation will be explained. First, regarding the operation of the preliminary conveyance system, as shown in Fig. 1, the preliminary conveyance roller 1
When the drive pulley 12 rotates in the direction A shown in FIG. Then, as shown in FIG. 5, the support member 6 first rotates counterclockwise around the support member shaft 7, hits the forward rotation stopper 8 and stops, and then the preliminary conveyance pulley 2 and the pulley 4 rotate.
That is, the preliminary conveyance roller 1 rotates. In order to perform such an operation, the rotational resistance of the support member 6 should be minimized, and when the belt 13 is stopped, the support member 6 should be
The preliminary conveying roller 1, the preliminary conveying pulley 2, the preliminary conveying roller shaft 3, the pulley 4, the rotating shaft 5, and the support member 6 can stand still at any position without rotating due to their own weight within the rotation range. It is necessary to apply a load to the rotation of pulley 2 or pulley 4. In this embodiment, as shown in FIG. 1, a cushioning material 30 is sandwiched between the preliminary conveyance roller 1 and the support member 6, so that a load is applied to the rotation of the preliminary conveyance pulley 2. Further, the position of the normal rotation stopper 8 is set so that the preliminary conveyance roller 1 is pressed by the document presser 22 at the same time as it comes above the document table 20. Furthermore, within the rotation range of the support member 6, the outer circumference spanning the preliminary conveyance pulley 2, pulley 4, and drive pulley 12 is configured to be approximately constant, so that the belt 13 will not become too tensioned or too slack. .

Next, the reading operation will be explained according to the flowchart shown in FIG.

F1: The user sets the original 19 on the original table 20.

F2: The document presence/absence sensor 21 detects the document 19 and sends a signal to the control section 28.

F3: In response to a signal from the control section 28, the drive motor 14 rotates the separation gear 16 (in the direction A in FIG. 1). Then, the spring clutch 17 transmits the drive to the separation roller 10 and the separation shaft 11, causing them to rotate in the A direction, so that the drive pulley 12 connected to the separation shaft 11 also rotates in the A direction, and the preliminary conveyance roller 1 moves the original 19 is transported to the separation section.

By the way, when the user sets the document 19, if the user inserts the document 19 at a slower speed than the circumferential speed of the preliminary conveyance roller 1, the document 19 will be drawn in by the preliminary conveyance roller 1, but if the document 19 is inserted faster than the circumferential speed of the preliminary conveyance roller 1. The preliminary conveyance roller 1 is rotated by the document 19 and rotates faster than the rotational speed given by the drive motor 14. Then, the preliminary conveyance pulley 2
Since the length of the belt 13 between the drive pulley 12 and the drive pulley 12 increases, and conversely the length of the belt 13 between the pulley 4 and the drive pulley 12 decreases, the support member 6 rotates clockwise in FIG. Since the original 19 is lowered, there is no possibility that the original 19 will be caught by the preliminary conveyance roller 20 and damaged. Thereafter, when the user stops inserting the original document 19, the preliminary conveyance roller 1 conveys the document 19. Note that the support member 6 is larger than necessary in FIG.
A reversal stopper 9 prevents clockwise rotation.

F4: The first sheet of the original 19 is on the separation roller 10
and a cueing sensor 24 separated by a separating member 23.
The control section 28 controls the drive motor 14 to rotate until the leading edge of the separated document 19 is detected, and then to stop.

F5: The user sets the density, resolution, etc. for reading, and starts reading.

F6: In response to a signal from the control section 28, the drive motor 14 rotates the separation gear 16 (in the direction A in FIG. 1).

F7: The separated original 19 is transported to the reading section 26 by the transport roller 25. At this time, since the circumferential speed of the conveyance roller 25 is set faster than the circumferential speed of the separation roller 10, the separation roller 10 rotates together, the spring clutch 17 is disengaged, the separation shaft 11 also stops, and the separation gear 16
becomes idling.

Further, the preliminary conveyance roller 1 also rotates, but since the separation shaft 11 is stopped, the length of the belt 13 between the preliminary conveyance pulley 2 and the drive pulley 12 increases, and conversely, the length of the belt 13 between the preliminary conveyance pulley 2 and the drive pulley 12 increases. Since the length of the belt 13 is reduced, the support member 6 rotates clockwise in FIG. 1 and is lowered to a position where the preliminary conveying roller 1 no longer rotates with it, so that the preliminary conveying force is eliminated.

After that, when the rear end of the document 19 passes the separation roller 10, the separation roller 10 stops rotating, the spring clutch 17 is engaged, and the preliminary conveying force is restored again.

F8: The reading section 26 reads the image information of the transported document 19.

F9: The read original 19 is ejected by the ejection roller 27.

[0024] F10: After reading one page, if there is still another document 19, return to F7 and continue reading.
When the entire document 19 has been read, the process advances to F11.

F11: The drive motor 14 is stopped by a signal from the control section 28, and all reading operations are completed.

By adopting the configuration described above, it is possible not only to automatically activate or deactivate the preliminary conveying force with a single drive motor without any complicated control, but also to improve the ease of setting documents. can also be improved.

[Other Embodiments] FIG. 6 shows a second embodiment of the present invention, in which reference numeral 29 is a preliminary conveyance motor that drives only the preliminary conveyance system, and the drive pulley 12 is independently driven by the preliminary conveyance motor 29. is given. As shown in the block diagram of FIG. 7, a control section 28 of a facsimile machine or the like controls the drive motor 14, document presence/absence sensor 21, cue sensor 24, and reading section 26 as well as the preliminary conveyance motor 29. The reading operation in this case is as shown in the flowchart shown in FIG.

F1: The user sets the original 19 on the original table 20.

F2: The document presence/absence sensor 21 detects the document 19 and sends a signal to the control section 28.

F3: The drive motor 14 and the preliminary transport motor 29 are rotated by a signal from the control section 28. The movement of the preliminary conveyance system at this time is the same as in the first embodiment.

F4: The first sheet of the original 19 is on the separation roller 10
and a cueing sensor 24 separated by a separating member 23.
The control section 28 controls the drive motor 14 to rotate until the leading edge of the separated document 19 is detected, and then to stop.

F5: The user sets the reading density, resolution, etc., and starts reading.

F6: The drive motor 14 is rotated by the signal from the control section 28, and the separation roller 10 and the conveyance roller 25 are rotated.
and drives the paper discharge roller 27.

F7: The separated original 19 is transported to the reading section 26 by the transport roller 25.

F8: The reading section 26 reads the image information of the transported document 19.

F9: The read original 19 is ejected by the ejection roller 27.

F10: When reading of one sheet is completed and there is still another original 19, the process advances to F11, and when all the originals 19 have been read, the process advances to F14.

F11: Separation roller 10 and separation member 23
The next document 19 is separated. However, since the preliminary conveyance force is not working at this time, the document 19 may not be conveyed. Therefore, even if it exceeds a certain period of time, the original 1
9 is not conveyed, that is, the cue sensor 24 is not conveying original 1.
If 9 is not detected, proceed to F12, if detected, proceed to F1
Proceed to step 3.

F12: The preliminary conveyance motor 29 is rotated by a signal from the control section 28 to provide preliminary conveyance force. The movement of the preliminary conveyance system at this time is the same as in the first embodiment.

F13: If the preliminary conveyance motor 29 is rotating according to the signal from the control unit 28, it is stopped, the preliminary conveyance force is cut off, and the process returns to F7 to continue reading.

F14: The drive motor 14 is stopped by a signal from the control section 28. Then, all reading operations are completed.

With the configuration described above, the influence of the preliminary conveying force on the separating means can be controlled most appropriately with a simple structure.

9 to 11 show other embodiments for applying a load to the rotation of the preliminary conveyance pulley 2. Reference numeral 31 in FIG. This is a leaf spring that applies load to the rotation of the preliminary conveyance pulley 2.

Reference numeral 32 in FIG. 10 denotes a friction plate which is regulated so as not to rotate by itself and is pressed against the end of the preliminary conveyance roller 1 by a spring 33 to apply a load to the rotation of the preliminary conveyance pulley 2. .

Furthermore, 34 in FIG. 11 is applied over a collar 35 fixed to the preliminary conveyance roller 1 and the support member 6, and is applied with an appropriate loosening torque when the preliminary conveyance roller 1 rotates in the direction of conveying the document 19. This is a spring clutch that generates a load on the rotation of the preliminary conveyance pulley 2. As mentioned above, using these configurations, the pulley 4
It is also possible to apply a load to the rotation of.

[0046]

Effects of the Invention Since the sheet material feeding device according to the present invention is constructed as described above, it has the effect of stabilizing the influence of the preliminary conveying force on the separating means without increasing the manufacturing cost.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention;

[Figure 2]
A plan view showing a first embodiment of the present invention,

FIG. 3 is a block diagram showing the configuration of the first embodiment of the present invention;

FIG. 4 is a flowchart representing the operation of the first embodiment of the present invention;

FIG. 5 is a sectional view showing the operation of the first embodiment of the present invention;

[
FIG. 6 is a plan view showing a second embodiment of the present invention;

FIG. 7 is a block diagram showing the configuration of a second embodiment of the present invention;

FIG. 8 is a flowchart representing the operation of the second embodiment of the present invention;

FIG. 9 is a configuration diagram showing a third embodiment of the present invention;

[Figure 10
] A configuration diagram showing a fourth embodiment of the present invention,

FIG. 11 is a configuration diagram showing a fifth embodiment of the present invention.

[Explanation of symbols]

1 Preliminary conveyance roller 2 Preliminary conveyance pulley 3 Preliminary conveyance roller shaft 4 Pulley 5 Rotation axis 6 Support member 7 Support member shaft 12 Drive pulley 13 Belt

Claims (2)

[Claims] 1. A table for setting sheet materials, a separation means for separating a plurality of sheet materials, and a preliminary conveyance means for conveying the sheet materials set on the table to the separation means. , a drive for driving the preliminary conveyance means, wherein the preliminary conveyance means includes a preliminary conveyance rotary body for conveying the sheet material, and a rotation shaft of the preliminary conveyance rotary body. A support member that supports and simultaneously rotates with its own rotating shaft; and when a drive is transmitted by the drive means, the support member first rotates;
a transmission means configured to rotate the preliminary conveyance rotating body when rotation of the support member is regulated, and the rotation of the support member causes the preliminary conveyance roller to move above or below the table. A sheet material feeding device characterized in that, when the speed at which the sheet material is inserted into the table is faster than the rotational speed of the preliminary conveying rotary body, the preliminary conveying rotary body is lowered. 2. A table for setting sheet materials, a separation means for separating a plurality of sheet materials, and a preliminary conveyance means for conveying the sheet materials set on the table to the separation means. , a drive for driving the preliminary conveyance means, wherein the preliminary conveyance means includes a preliminary conveyance rotary body for conveying the sheet material, and a rotation shaft of the preliminary conveyance rotary body. A support member that supports and simultaneously rotates with its own rotating shaft; and when a drive is transmitted by the drive means, the support member first rotates;
a transmission means configured to rotate the preliminary conveyance rotating body when rotation of the support member is regulated, and the rotation of the support member causes the preliminary conveyance roller to move above or below the table. A sheet material feeding device characterized in that, when the sheet material is fed by a downstream conveyance means and the separation means rotates, the preliminary conveyance rotating body descends.