JPS61162434A - Sheet supply device - Google Patents

Abstract

PURPOSE:To make it possible to surely feed out sheets one by one irrespective of the length of the sheet, by linging up the front ends of the sheets once in a sheet storing section upon feed of the sheets, and then by feeding the sheets one by one. CONSTITUTION:When a sheet 7 is fed, a losening roller 2 is always taken into such a condition that the pin 15 is positioned in the vicinity of a groove end 22a of a roller body 22. Further, when the next sheet 7 is fed, the pin 18 at first moves in a groove 22b while the roller body 22 does not move even if the shaft of a roller 2 starts its rotation, and then the roller body 22 starts its rotation after the pin 16 abuts one groove end 22c. Further, when the rota tion of the roller body 22 comes to a stop, the sheets 7 are fed out by a feed-out roller 1 toward a loosening roller to line up the front ends of long and short sheets, and thereafter the sheets 7 are fed out in association with the rotation of both roller bodies 25, 22. Accordingly, even if various short and long sheets 7 are mixed with each other, the feed-out roller 1 beforehand lines up the front ends of the sheets 7, and therefore, the sheets 7 maybe surely fed out one by one.

Description

[Detailed description of the invention] Technical field + fill + 11↓m1lk J, L* Mlk
M? , L+-Mr4r It relates to a sheet feeding device that supplies sheets to a sheet reading device, a sheet sorting device, and the like.

Conventional technology Conventionally, in a small sheet feeder, sheets of different lengths in the longitudinal direction are collected into a bundle, the front edges of the sheets are struck to align them, and then the sheets are stored in a sheet storage box and the sheets are stacked in a bundle. A feeding roller and a separating roller are provided along the sheet feeding direction on one of the pair of opposing surfaces of the storage box, and a certain pressing force is applied to the sheet from the other surface toward the two rollers so that the sheet is moved between the two rollers. There is one in which the sheets are pushed one by one out of the storage box by rotating both rollers and using the frictional force between both rollers and the sheet.

Problems to be Solved by the Invention However, with the structure described above, in the case of sheets with a large difference in length in the longitudinal direction, such as banknotes, the front end of the shorter sheet is not necessarily the front end of the longer sheet. They are not lined up, and the short sheet mentioned above comes into pressure contact with the feed roller, while the long sheet to be sent out next comes into pressure contact with the sorting roller, and due to the rotation of both rollers, the short sheet mentioned above comes into contact with the separation roller. At the same time, two long sheets were sometimes fed at the same time.

Therefore, an object of the present invention is to provide a sheet feeding device that can reliably feed sheets one by one regardless of the length of the sheets.

In order to achieve the above object, the present invention first aligns the front edges of the sheets in the sheet storage section when feeding the sheets, and then
It was configured to feed sheets one by one. That is, the sorting roller is formed by connecting a roller drive shaft that rotates synchronously with the feed roller and a roller body with a predetermined amount of play in the rotation direction, and the pair of feed rollers has a circumferential speed equal to that of the sorting roller. The structure is such that it is connected to a drive device that drives it faster than the circumferential speed. The above-mentioned play of the sorting roller can be reduced by inserting a pin into the roller drive shaft or the roller body and by providing a groove in the roller body or the roller drive shaft that allows movement within a predetermined range in the rotational direction, or by providing the roller pongee of the sorting roller. A first gear is fixed to the drive shaft for driving the roller pongee, and a second gear that meshes with the first gear is fixed to a drive shaft that drives the roller pongee to provide a predetermined amount of bank lash between the first gear and the second gear. It can be formed by

Effects and Effects of the Invention According to the above configuration, when the pair of feed rollers transports the sheet sent out from the sorting roller, the driving device pulls out the sheet sandwiched between the sorting roller and the sorting member, and the sheet is transferred to the sorting roller. The roller body is rotated faster than the roller drive shaft to temporarily stop the rotation of the roller body due to play, and while this rotation is stopped, the feed roller sends the next sheet to be fed to the separation roller, and the front end of the sheet is transferred to the separation roller. Even if the length of the sheets is different in the longitudinal direction, the sheets can be fed out from the sheet storage section after aligning the front edges of the sheets, and the sheets can be fed two sheets together with the next sheet. This can be effectively prevented.

In other words, when a long sheet is bundled and its front edges are aligned, the front edge of a short sheet is almost at a predetermined position, but when a short sheet is sandwiched between long sheets, the front edge of the short sheet is at the same position as the front edge of the long sheet. It was difficult to locate it. Therefore, as in the present invention, once both short and long sheets are fed forward by a certain amount between the feed roller and the separation roller to align the leading edge of the sheet with the separation roller, the feed roller and the separation roller It is possible to feed only the sheet in question.

Embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in FIGS. 1 and 2, the sheet feeding device according to the present embodiment includes one side wall 6 of a substantially rectangular box-shaped sheet storage portion 6 of a machine frame 23.
A feed roller 1 and a separating roller 2 are provided at one end of b, and a plate-shaped sheet presser 8 that presses the rectangular sheet 7 against both rollers 1.2 with a spring force is provided on the side wall side opposite to the above-mentioned side wall 6b. while the front edge of the sheet is in contact with the I
Wall 6a1-L-Ya Tsukuda 1 Nishiki C1+ Photographer Ekan Kaoru →
- Equipped with a sheet conveyance path 9 surrounded by a bulge Q19b,
One i9b is provided with a separating member 5 made of a urethane plate that contacts the separating roller 2, and a pair of sheet feeding rollers 3 and 4 are provided on the pair of walls 9a and 9b, respectively. In FIG. 1, the sheets 7 in the sheet storage section 6 are shown separated for the sake of explanation, but in actual use, they are pressed against the side wall of the storage section by the sheet presser 8 without any gaps, resulting in an overlapping state.

The seat storage section 6 has a flat bottom surface 6c and seats 7,
. . , 7 can be freely moved in the thickness direction by a sheet presser 8. This sheet presser 8 is arranged parallel to one side wall 6b of the sheet storage section 6 having the feed roller 1 and the sorting roller 2, and the sheets 71..., 7 are sent into the sheet conveyance path 9 along the above-mentioned side wall. Like, -
Each sheet 7 is pressed parallel to the side wall 6b.

The feed roller 1 and the separating roller 2 are both erected on the machine frame 23 so as to be perpendicular to the bottom surface 6c of the sheet storage section 6.

The feed roller 1 has bearings 11 at two locations on the roller pongee 10.
, 11, the roller shaft 10 is supported on the ascending machine frame 23.
is rotatable, a roller main body 25 is fixed to the upper end of the roller shaft 10, and a pulley 12 is fixed to both bearings 11 and 11.

The sorting roller 2 has bearings 11.1 at two locations on the roller shaft 14.
The roller shaft 14 is rotatably supported on the ascending machine frame 23 on the upper end of the roller shaft 14.
2 are fitted to be relatively rotatable, and the pulley 16 is fixed to the two bearings 11 and 11 open, while the lower end is connected to the motor 20 via a one-way clutch 21. A belt 13 is used to open the pulley 16 of the roller shaft 14 of the sorting roller 2 and the pulley 12 of the roller shaft 10 of the delivery roller 1.
is stretched, and the roller shaft 14 of the sorting roller 2 is connected to the motor 20.
When the feed roller 1 rotates in the same direction, the roller shaft 10 of the feed roller 1 also rotates in the same direction via the belt 13. Each of the roller bodies 25 and 22 has an outer peripheral surface made of rubber or the like having a coefficient of friction that allows the sheet 7 to be sent out from inside the sheet storage section, and a small diameter roller shaft cover 22a is provided at the upper end of one roller body 22. 6. The cover 22a has an opening groove 22b at a constant angle on its circumferential surface, and the bottle 15, which is integrally provided at the upper end of the roller shaft and protrudes in the radial direction, is rotatably fitted into the groove 22b. . Therefore, when the bottle 15 contacts one of the groove ends 22c as shown by the solid line position A in FIG. 1, the roller shaft 14 and the roller main body 22 rotate integrally, while the As shown, when the bottle 15 is not in contact with the one groove end 22c such as the other groove end n22d, only the roller shaft 14 rotates until the bottle 15 moves within the groove 22b and comes into contact with the groove end 22c. When the bottle 15 contacts the groove end 81s22c, the roller shaft 14 and the roller main body 22 rotate integrally.

Note that the separating member 5 provided on the wall 9b of the sheet conveyance path 9 is always in contact with the circumferential surface of the roller main body 22 with a constant pressing force, and the separating member 5 and the separating roller 2
Try to send it out through the opening.

Further, the pair of feed rollers 3 and 4 are connected to the pair of rollers 1 and 4.
．． The roller shafts 17 are erected on the machine frame 23 substantially parallel to the machine frame 23, and are supported on the machine frame 23 by bearings 11, 11 at two locations on each roller shaft 17, making the roller shafts 17 freely rotatable. Each roller shaft 1
A sheet feed roller main body 24 is fixed to the upper end of the roller shaft 17, and a pulley 18 is fixed to the roller shaft 17, which drives a motor etc. via a belt 19. The device 26 is connected to the device 26 . The pair of feed rollers 3 and 4 are arranged so that their roller bodies 24 and 24 are in contact with each other, and as the one roller shaft 17 rotates, the other roller shaft 17 rotates in the opposite direction through the contact of the roller bodies 24 and 24. do.

It is desirable that the circumferential speed ratio of the feed roller 1, the separating roller 2, and each of the feed rollers 3 and 4 is 1:1:1.3. In this way, by making the circumferential speed of the feed roller 3.4 faster than that of the feed roller 1 and the separating roller 2, when the sheet 7 is fed by the feed roller 3.4, it is faster than the feeding roller 1 and the separating roller 2. The roller body 2 of the roller 2 that slips the sheet 7 and separates it.
2 is placed on the roller shaft 14 so that it touches the other groove end 22d, and when feeding the next sheet 7, the roller body 22 stops rotating as will be described later, so that the front ends of the sheets are aligned.

According to the above configuration, the feed roller 1 and the separating roller 2
When rotating the sheet 7 to feed the sheet 7 from the storage section 6 into the conveyance path 9, the feed roller 1 rotates integrally with the roller shaft 10, while the sorting roller 2 rotates as the bin 15 rotates within the groove 22b. Only the roller shaft 14 rotates by a certain angle until it hits one of the groove ends 22c, and after the bottle 15 hits one of the groove ends 22c, the roller body 22 is integrally connected to the roller shaft 14 and the feed roller 1. Rotate at the same speed. Therefore, first, the sheet 7 is advanced in the feeding direction only by the feed roller 1, and its front end is separated and the roller body of the roller 2 is
2 and the separating member 5. That is, since the front end of the long sheet 7b is located almost at a predetermined sheet front end position and is close to the contact area between the sorting roller 2 and the sorting member 5, the long sheet 7b is inserted between the contact areas as it is fed, and the remaining sheet is While the portion is slightly bent in the longitudinal direction, the front end of the short sheet (7a) is located at a position away from the predetermined sheet front end position in the opposite direction to the sheet feeding direction, and is separated from the separating roller 2. Since it is separated from the contact part with the member 5, when only the feed roller 1 rotates, its front end is inserted into the contact part between the separating roller 2 and the separating member 5,
C) Eliminate irregularities at the front end of 7a. After that, the sorting roller 2 is rotated integrally with the feed roller 1, and the sheet 7 is
One sheet of paper is fed into the sheet conveyance path 9 and inserted between a pair of feed rollers 3 and 4. Then, the sheet 7 is sent out by the pair of feed rollers 3 and 4, and the feed roller 1 and the separating roller 2
Further feed the sheet 7 at a faster speed.

In this case, the feed roller 1 is rotatable in the sheet feeding direction, and the sorting roller 2 is rotatable in the sheet feeding direction.
5 moves relatively within the groove 22b to one groove end 22c.
The roller main body 22 is rotatable in the sheet feeding direction until the roller body 22 hits the groove end portion 22.
In case c, since the roller main body 22 and the roller shaft 14 are integrally rotatable in the sheet feeding direction by the one-way clutch 21, when the sheet 7 is sent out by the pair of feeding rollers 3 and 4. Both rollers 1 and 2 do not interfere with the feeding of the sheet 7 in any way.

In this way, when one sheet 7 is fed, the sorting roller 2 is always in a state where the bin 15 is located near the other groove end 22cl of the roller body 22, and when the next sheet 7 is fed, the roller shaft 14 rotates. At first, the roller main body 22 does not move and the bottle 15 moves within the groove 22b, and after the bottle 15 hits one groove end 22c, the roller main body 22 starts to rotate. When the rotation is stopped, the sheet 7 is sent out to the sorting roller side by the sending roller 1 to align the front ends of the long sheets 7, and then the sheet 7 is sent out by the rotation of both roller bodies 25 and 22.

According to the above embodiment, only the feed roller 1 of the feed roller 1 and the sorting roller 2 is rotated for a certain period of time,
After inserting the front end of the sheet 7 into the opening between the sorting roller 2 and the sorting member 5, both roller bodies 25 and 22 are rotated together to send the sheet 7 between the feed rollers 3 and 4. Since the sheet 7 is further conveyed in step 4, even if the sheets 7, . After only one sheet 7 to be sent to the sorting roller 2 is pressed into contact with it, it is pressed.

- It is possible to feed the door and effectively prevent two sheets from being fed at the same time.

Note that the present invention is not limited to this example, and can be implemented in various other ways. For example, the same effect may be achieved by providing the bottle 15 on the roller body 22 and providing the groove 22b on the roller shaft 14. In addition to the pin and groove, it is also possible to fix a gear to the roller shaft and fix a gear that meshes with the gear to the drive shaft that drives the roller shaft, increasing the backlash of both gears and reducing the play as described above. The front ends of the sheets may be aligned by performing a similar action to that of the bin 15 and the groove 22b. Also,
The roller shaft 14 may not be provided with the one-way clutch 21, and the spring force of the sheet presser 8 may be adjusted to cause the sheet 7 to slip as appropriate to perform the same action as the one-way clutch 21.

[Brief explanation of drawings]

1 and 2 are a plan view and a front view of a main part of a sheet feeding device according to an embodiment of the present invention, respectively. 1... Feeding roller, 2... Sorting roller, 3, 4
...Feed roller, 5... Sorting member, 6... Sheet storage section, 7... Sheet, 7IL... Short sheet, 7
b...Long sheet, 8...Sheet presser, 9...Sheet conveyance path, 10°14.17...Roller shaft, 11...
...Bearing, 12,16°18...Pulley, 13.19
...Belt, 15...Bin, 20...Motor, 2
1...One-way clutch, 22.24,25...
Roller body, 22b...Groove, 26...Drive device.

Claims (1)

[Claims] (1) The stacked sheets are fed one by one by the feed roller provided in the sheet storage section, and the sheets are passed one by one by the separating roller between the separating member pressed against the circumferential surface of the roller and the circumferential surface of the roller. In a sheet feeding device that feeds out a sheet from a sheet storage section and conveys the fed sheet by a pair of feeding rollers, the separating roller has a predetermined amount of play in the rotational direction on a roller drive shaft that rotates in synchronization with the feeding roller. 1. A sheet feeding device comprising a pair of roller bodies connected to each other so that the pair of feed rollers have a circumferential speed faster than the circumferential speed of the separating roller.