JPS59198241A - Sheet separation conveying device - Google Patents

Abstract

PURPOSE:To convey sheets while separating them individually, by setting up each driving roller at a position being not opposed with each other, and forcibly pressing a driven roller to a conveyed sheet as well as making it retractable in the reverse direction in time of installation. CONSTITUTION:A conveying endless belt 10 is stretched over a driving roller 12 and a driven roller 13 respectively, while a separation endless belt 11 is stretched over a driving roller 14 and a driven roller 15 respectively. These belts 10 and 11 are constituted so as to be moved in the reverse direction with each other at the opposite surface, and the driving roller 12 is rotated clockwise while the driving roller 14 is also rotated clockwise, and at the opposite surface between these belts 10 and 11, the former 10 is moved to the left while the latter 11 to the right respectively. An original sheet 16 is mounted on a table 17 and fed into a sheet separation conveying device 3 by a pickup roller 2, thus it is conveyed separately.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet separating and conveying device that separates and conveys a large number of stacked sheets one by one. This invention relates to a sheet document separation and conveyance device used to separate sheet documents and feed them into an apparatus.

As such a sheet separation and conveyance device, an endless belt for conveyance is attached to a drive [1-ra and a driven 0-, and a drive 0-
- Arrange the endless sheets for separation that are applied to the roller and the driven roller to face each other, and move both endless belts in opposite directions on the opposing surfaces to separate the sheets that have been fed in duplicate between the belts. A sheet separation and conveyance device has been proposed that conveys sheets while simultaneously conveying them. In such a device, between the frictional force El between the conveying endless belt and the sheet, the frictional force F2 between the separating endless belt and the sheet, and the frictional force F3 between the sheets, 'Es > F2 > The configuration is such that the relationship F3 holds true. On the facing surfaces of these endless belts, the endless conveying belt is moved in the sheet conveying direction, and the separating endless belt is moved in the opposite direction, that is, in the sheet return direction. When multiple sheets are transferred between these endless belts, the separating endless belt returns the first sheet in contact with it in the opposite direction to the conveying direction.

Next, the endless separation belt comes into contact with the second sheet and returns it. In this way, the separating endless belt sequentially returns the sheets that have been transferred in duplicate in the opposite direction to the conveying direction, and in the end, there is only one sheet between the conveying endless belt and the separating endless belt. In such a state, the sheet is conveyed by the endless belt for conveyance due to the above-mentioned relationship of Fx>F2, and thus the sheets that are double-fed and transferred between the above-mentioned pair of belts are separated and become one sheet. only will be transported.

In the conventionally proposed sheet separation and conveyance device of the above type, the endless belt for conveyance and the endless belt for separation must be held in contact with each other. The -ra are arranged so as to face each other with a narrow gap between them.

However, if the driving O-ra and driven O-ra of the endless belt for conveyance and the endless sheet for separation are placed facing each other with a narrow gap, extremely thick sheets cannot be passed between the belts. When the sheets are overlapped, or when the sheets are passed between the belts while remaining thickly overlapped, the sheets may be damaged or the device itself may be damaged. In the case of a driven roller, in order to eliminate the above-mentioned problems, the driven roller is not pivoted in a fixed position, but its rotating shaft is movable in a direction perpendicular to the sheet, and the normal In some cases, the driven roller may be held in a predetermined position, and when a thick sheet or thick sheets are fed in, the driven roller may be released by the width of the sheet. However, the drive O
In the case of the drive 0-ra, since a mechanism for transmitting rotational force is connected to the rotating shaft, it is impossible to movably support the rotating shaft of the drive 0-ra perpendicular to the seat. be.

An object of the present invention is to provide a sheet separating and conveying device that eliminates the possibility of damaging the sheets or destroying the device itself even if thick sheets or overlapping sheets are fed as described above. That's true.

The sheet separating and conveying device according to the present invention is characterized by applying an endless belt for conveyance and an endless belt for separation to their respective driving 0-ra and driven 0-ra, and rotating these endless belts in opposite directions on their opposing surfaces. In a sheet separating and conveying device that moves and conveys sheets that are overlapped between belts while separating them, the respective driving rollers are arranged at positions that do not face each other, and the driven rollers are arranged so that the driven rollers are not opposed to each other. It is provided so that it can be pushed and retracted in the opposite direction.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a seven-axle cutting device will be described below with reference to the drawings.

In Figure 1, 1 is a guide that guides the manuscript sheet, and 2 is a guide that guides the manuscript sheet.
3 is a document sheet separation and conveyance device according to the present invention, 4 is a feeding roller, 5 is a discharge roller, 6 is a light source for illumination, 7 is a tray for stacking document sheets, and 8 is a recording device. 9 indicates a recording sheet loading tray. During transmission, a document sheet is sent from the guide 1 by the pickup roller 2, separated and conveyed by the document sheet separation and conveyance device 3, fed by the feed row 54, and then output from 0 to 55.
is discharged onto the tray 7. The original is read and transmitted by a reading device disposed between the feed O-ra 4 and the ejection O-ra 5. Further, during reception, the recording sheet is sent out from the roll 8 and discharged onto a tray, and on the way, recording is performed on the recording sheet by a recording means such as a thermal head. Since the document reading device and recording device described above may be of the horizontal type, they will not be described in detail here.

The document sheet separation and conveyance device 3 described above represents an embodiment of the present invention, and its details are shown in FIG.

In FIG. 2, reference numeral 10 indicates an endless belt for conveyance, and reference numeral 11 indicates an endless belt for separation. and is applied to the driven roller 15. These belts 10.11 are arranged to move in opposite directions to each other on their opposite faces, so that in the example shown, drives 0-512 are rotated clockwise and drives 0-5
14 is also rotated clockwise, and belt 1° moves toward the left on the surface facing belts 10 and 110, and belt 11
moves towards the right. The original sheet 16 is placed on a table 17, and when the original sheet is fed, the original sheet 16 is sent to the sheet separation and conveyance device 3 by the pickup row 52, and is thereby separated and conveyed.

As mentioned above, the endless conveying belt 1o and the document sheet 16
The relationship Fl > F2 > Fa exists between the frictional force F1 between the separation endless belt 11 and the original sheet 16, the frictional force F2 between the sheets 16, and the frictional force F3 between the sheets 16. Accordingly, the original sheets that have been transferred between the belts are separated and transported between the belts.

According to the present invention, the drive 0-512 and the drive row 514 are arranged at positions that do not face each other, and the drive 0-ra 13 and the driven 0-ra 15 are provided so as to be retractable in the direction away from the sheet. In a normal case, the driven O-ru 13 is elastically pressed toward the separating endless belt 11, and the belt 10 is pressed between the driving O-ra 12 and the driven O-ra 13.
In order to maintain tension, a spring 19 is installed between the shaft 18 fixed inside the device body and the rotating shaft 13a of the driven roller 13.
is placed. This spring 19 applies an elastic force to the rotating shaft 13a in the direction shown by arrow A, and generates a component force that presses the driven row 513 toward the endless separating belt 11 and
A component force that tensions the belt 10 is generated between the O-ra 13 and the drive O-ra 12. This force causes the shaft 13a of the driven roller 13 to abut against the fixed abutment surface 20 provided within the main body of the apparatus, causing the driven roller 13 to become 0-roller. 13 is held in place.

Similarly, the shaft 21 and the driven roller 1 are fixed in the main body of the device.
A spring 22 is disposed between the rotating shafts 15a of the driven wheels 0-515, and this spring 22 applies an elastic force to the rotating shafts 15a in the direction indicated by the arrow B.
a is abutted against a fixed abutment surface 23 provided within the apparatus main body to hold the driven roller 15 in a predetermined position, and also to hold the belt 11 in a tensioned state between the driven roller 0-515 and the drive row 514.

In the above document sheet separation and conveyance device, the driven rollers 13 and 15 are always pressed toward the conveyance sheet by the action of the springs 19 and 21, and the belt 101110
The sheets are reliably separated and conveyed between them. However, belt 10
, 110, when thick original sheets or thickly overlapped original sheets are sent, the driven 0-513.1
5 elastically escapes in the direction shown by arrow 01D, thereby preventing damage to the sheet or destruction of the device.

FIG. 3(a), 0 shows a modified example of the sheet separation and conveyance device described above. In the embodiment shown in FIG. 2, the drive 0-ra 12 of the endless conveying belt 1o is arranged on the original sheet feeding side, and the driving 0-ra 14 of the separating endless belt 11 is arranged on the original sheet ejection side. However, in FIG. 3(a), the driving roller 5 of the endless belt 10 for conveyance is reversed from the arrangement shown in FIG.
12 is placed on the document sheet ejection side, and the endless separating belt 1
An embodiment is shown in which the drive roller 14 of No. 1 is arranged on the original sheet feeding side. In this case, when a thick original sheet is fed, the rows 513.14 escape as shown by arrows C' and D', but the effect is the same as that shown in FIG.

FIG. 3(f) shows an embodiment in which the driving rows 512, 14 of the conveying endless belt 1o and the separating endless belt 11 are arranged on the document sheet ejection side, but they are arranged differently. show. The driven rollers 13.15 are arranged so as to be retractable in the same manner as above. In this embodiment, when a thick original sheet is fed, the driven row 513.14
is evacuated, and the thick original sheet can be passed through without straining.
Since the thick sheet passes through the drive 0-51-4 while pushing the belt, there is no risk of the sheet being damaged or the device being destroyed by the thick sheet.

FIG. 4 shows serrated irregularities 10 on the surface of the endless conveying belt 10 in order to increase the frictional force of the endless conveying belt 10.
The one with a is shown. Such irregularities are not limited to sawtooth shapes, but can take various forms.

FIG. 5(A) shows one provided with tooth-like projections, and FIG. 5O shows one provided with wart-like projections.

As described above, in the sheet separating and conveying device according to the present invention, when a thick sheet is fed in, or when thick sheets overlapped, the sheet is not damaged or the device itself is not destroyed. effectively prevented.

[Brief explanation of drawings]

FIG. 1 is a side view showing an outline of a facsimile machine embodying the present invention, FIG. 2 is a side view showing an embodiment of the sheet separation and conveyance device according to the present invention, and FIG. 3 is a modification of the device according to the present invention. FIG. 4 is a schematic view showing an example, FIG. 4 is a side view showing still another modification of the device of the present invention, and FIGS.
110... Endless belt for conveyance 11... Endless belt for separation 12... Driving roller 13... Driven roller 14.
...Drive roller 15...Followed roller 16...Manuscript sheet Figure 3 Figure 4 (A) (B)

Claims (1)

[Claims] The endless belt for conveyance and the endless belt for separation are placed on their respective driving rollers and driven rollers. In a sheet separating and conveying device that conveys fed and transferred sheets while separating them, the respective driving O-rurs are arranged at positions that do not face each other, and the driven O-ru is pressed against the conveying sheet, and A sheet separation and conveyance device characterized in that it is provided so as to be retractable in the opposite direction.