JPH0419146B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a sheet feeding device that feeds sheets of banknotes, cards, etc. one by one to a sheet reading device, a sheet sorting device, or the like.

Conventional technology Conventionally, in a small sheet feeder, sheets with different lengths and short lengths 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 placed in the sheet storage box. 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 aligned, 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 feed roller. At the same time, two long sheets were sometimes fed at the same time.

SUMMARY OF THE INVENTION 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.

Means for Solving the Problems In order to achieve the above object, the present invention is configured such that when feeding sheets, the front ends of the sheets are once aligned in the sheet storage section, and then the sheets are fed one by one. In other words, the above-mentioned feed-out and handling roller is
The roller drive shaft rotates synchronously with the feed-out auxiliary roller, and the roller body is connected with a predetermined amount of play in the rotational direction, and the pair of feed rollers has a circumferential speed faster than the circumferential speed of the feed-out/handling roller. It is configured to be connected to a drive device that drives the device so that the The play of the above-mentioned feeding and handling roller is as follows.
By inserting a pin into the roller drive shaft or the roller body and providing the roller body or the roller drive shaft with a groove that allows it to move freely within a predetermined range in the rotational direction, or by fixing the first gear to the roller shaft of the delivery/handling roller. This can be formed by fixing a second gear that meshes with the first gear to a drive shaft that drives the roller shaft, and providing a predetermined amount of backlash between the first gear and the second gear.

Effects and Effects of the Invention According to the above configuration, when the sheets are arranged in advance, the sheets can be sent out while being sorted one by one by the feeding and sorting roller, even without the feeding function of the feeding auxiliary roller. On the other hand, when the sheets are not aligned, the front end of the sheet can be sent to the feed-out/separation roller by the feed-out auxiliary roller while the rotation of this roller is stopped due to the play of the feed-out/separation roller to align the sheets. Thereafter, the sheets can be fed out one by one while being sorted by the feed and sorting roller. In other words, when the pair of feed rollers transports the sheet fed out from the feed-out and sorting roller, the drive device pulls out the sheet sandwiched between the feed-out and sorting roller and the sorting member, and the roller of the feed-out and sorting roller The main body is rotated faster than the roller drive shaft to temporarily stop the rotation of the roller main body due to play, and while this rotation is stopped, the feed-out auxiliary roller sends the next sheet to be fed to the feed-out and sorting roller, and the leading edge of the sheet is fed out. Since the sheet is aligned with the handling roller, even if the length of the sheet is different in the longitudinal direction, the front edge of the sheet can be aligned and then the sheet can be sent out from the sheet storage section, and the sheet can be sent together with the next sheet to be sent. It is possible to effectively prevent double-sheet feeding. That is,
When long sheets are bundled together and their front edges are aligned, the front edges of long sheets are positioned almost at a predetermined position, but when a short sheet is sandwiched between long sheets, the front edge of the short sheet is positioned at the same position as the front edge of the long sheet. It was difficult. Therefore, as in the present invention, once both short and long sheets are advanced by a certain amount between the feed roller and the feed-out/handle roller to align the front edge of the sheet with the feed-out/handle roller, the feed roller and the feed-out/handle roller are moved forward. The sorting roller contacts only one sheet and can feed only that sheet.

Embodiments Below, embodiments of the present invention will be described in detail based on the drawings.

As shown in FIGS. 1 and 2, the sheet feeding device according to the present embodiment includes a feed roller 1 and a sorting roller 2 at one end of one side wall 6b of a substantially square box-shaped sheet storage portion 6 of a machine frame 23, and Both rollers 1 and 2
A plate-shaped sheet presser 8 for pressing the rectangular sheet 7 with spring force is provided on the side wall side opposite to the one side wall 6b, while the front end of the sheet contacts the side wall 6a.
A pair of walls 9 are provided at the corner where the side wall 6b and the side wall 6b are in contact with each other.
It has a sheet conveying path 9 surrounded by walls a and 9b, and a sorting member 5 made of a urethane plate that comes into contact with the sorting roller 2 on one wall 9b,
A pair of sheet feeding rollers 3 and 4 are provided on a pair of walls 9a and 9b, respectively. In addition, in FIG. 1, each sheet 7 in the sheet storage section 6 is drawn separated for the sake of explanation, but in actual use, the sheets are pressed against one side wall of the storage section by the sheet presser 8 without any gaps, and are in an overlapping state. .

The sheet storage section 6 has a flat bottom surface 6c, and a sheet presser 8 holds the sheets 7, . . . , 7 in the thickness direction.
Allows for more freedom of movement. 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 7, . . . , 7 are sent into the sheet conveyance path 9 along the one side wall. Each sheet 7 is pressed parallel to one 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 is supported on the machine frame 23 by bearings 11, 11 at two locations on the roller shaft 10, so that the roller shaft 10 can freely rotate.
The roller main body 25 is fixed to the upper end of 0, and both bearings 1
A pulley 12 is fixed between 1 and 11.

The sorting roller 2 is rotatably supported on the machine frame 23 by bearings 11, 11 at two locations on the roller shaft 14, and the roller main body 22 is attached to the upper end of the roller shaft 14 so as to be relatively rotatable. The pulley 16 is fitted between the two bearings 11, 11, and the lower end is connected to the motor 20 via the one-way clutch 21. The above handling roller 2
A belt 13 is stretched between the pulley 16 of the roller shaft 14 of the roller shaft 14 and the pulley 12 of the roller shaft 10 of the feeding roller 1.
4 is rotated by the motor 20, the roller shaft 10 of the feed roller 1 is also rotated in the same direction via the belt 13. Each of the above roller bodies 25, 22
The roller main body 22 has an outer circumferential 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 the upper end of one roller body 22 is provided with a small diameter roller shaft cover 22a. The cover 22a
has an opening groove 22b at a constant angle on its circumferential surface,
A pin 15 integrally provided at the upper end of the roller shaft and protruding in the radial direction is rotatably fitted into the groove 22b. Therefore, when the pin 15 contacts one of the groove ends 22c as shown by the solid line position A in FIG.
4 and the roller body 22 rotate integrally,
As shown by the two-dot chain line in FIG. 1, when the pin 15 is not in contact with one groove end 22c, such as the other groove end 22d, the pin 15 moves within the groove 22b until it comes into contact with the groove end 22c. Roller shaft 1
4 rotates, and when the pin 15 comes into contact with the groove end 22c, the roller shaft 14 and the roller main body 22 rotate integrally. Note that the sorting 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 sorting member 5 and the sorting roller 2 touch the sheets 7 one by one. Try to send it through the gap.

Further, the pair of feed rollers 3 and 4 are erected on the machine frame 23 substantially parallel to the pair of rollers 1 and 2, and are supported on the machine frame 23 by bearings 11 and 11 at two locations on each roller shaft 17. The roller shaft 17 is made rotatable. A sheet feeding roller main body 24 is fixed to the upper end of each roller shaft 17, and a pulley 18 is fixed to the roller shaft 17 between both bearings 11, 11 of one roller shaft 17, and It is connected to a drive device 26 such as a motor. The pair of feed rollers 3 and 4 have roller bodies 24,
24 are in contact with each other, and the rotation of one of the roller shafts 17 causes the other roller shaft 17 to reversely rotate through the contact between the roller bodies 24, 24.
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 rollers 3 and 4 faster than the feed roller 1 and the separation roller 2, when the sheet 7 is sent by the feed rollers 3 and 4, The sheet 7 is slipped and the roller body 22 of the sorting roller 2 is rotated with respect to the roller shaft 14, so that the pin 15 moves within the groove 22b and hits the other groove end 22d, and when feeding the next sheet 7. As will be described later, the roller main body 22 stops rotating to align the front edges of the sheets.

According to the above configuration, when the feed roller 1 and the separation roller 2 are rotated 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 separation roller 2 Only the roller shaft 14 rotates by a certain angle until the pin 15 rotates in the groove 22b and hits one groove end 22c, and after the pin 15 hits one groove end 22c, the roller body rotates. 22 rotates integrally with the roller shaft 14 at the same speed as the feed roller 1. Therefore, first, the sheet 7 is advanced in the feeding direction only by the feed roller 1, and its front end is inserted between the roller body 22 of the separating roller 2 and the separating member 5. That is, since the front end of the long sheet 7b is located almost at the predetermined sheet front end position and is close to the contact area between the sorting roller 2 and the sorting member 5, when only the feed roller 1 rotates, the front end is immediately located above the predetermined sheet front end position. It is inserted between the contact parts, and the rest of the sheet is slightly bent in the longitudinal direction, while
The front end of the short sheet 7a is located at a position away from the predetermined sheet front end position in the direction opposite to the sheet feeding direction, and is away from the contact area between the sorting roller 2 and the sorting member 5.
When the chisel rotates, its front end is inserted into the contact area between the sorting roller 2 and the sorting member 5, and the sheet 7a is
Eliminate irregularities on the front edge of the After that, the handling roller 2
is rotated integrally with the feed roller 1 to feed only one sheet 7 into the sheet conveyance path 9 and inserted between the pair of feed rollers 3 and 4. Then, the sheet 7 is further fed by the pair of feed rollers 3 and 4 at a faster speed than the feed roller 1 and the sorting roller 2.

In this case, the feeding roller 1 is rotatable in the sheet feeding direction, and the separating roller 2 is rotated until the pin 15 moves relatively within the groove 22b and hits one groove end 22c.
2 is rotatable in the sheet feeding direction, and furthermore, after the pin 15 hits the groove end 22c, the roller body 22 and the roller shaft 14 are integrally rotatable in the sheet feeding direction by the one-way clutch 21. Therefore, when the sheet 7 is being sent out by the pair of feed 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 pin 15 of the sorting roller 2 is always located near the other groove end 22d of the roller body 22, and when the next sheet 7 is fed, the roller shaft 14 rotates. When starting, the roller body 22 does not move and the pin 15 is in the groove 2.
2b, and the pin 15 moves in one groove end 22c.
When the roller body 22 stops rotating, the sheet 7 is sent out to the separating roller side by the feed roller 1, the front ends of the long and short sheets 7 are aligned, and then the front ends of the long and short sheets 7 are aligned. The sheet 7 is sent out by the rotation of the roller bodies 25 and 22.

According to the above embodiment, only the feed roller 1 out of the feed roller 1 and the separation roller 2 is rotated for a certain period of time, and after the front end of the sheet 7 is inserted between the separation roller 2 and the separation member 5, both roller bodies are rotated. 25 and 22 are rotated integrally to feed the sheet 7 between the feed rollers 3 and 4.
Since the sheet 7 is further conveyed, even if the sheets 7, . roller 2
The sheet 7 can be fed after only one sheet 7 to be fed is pressed into contact with the sheet 7, and it is possible to 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,
While the pin 15 is provided in the roller body 22, the groove 22
b may be provided on the roller shaft 14 to achieve the same effect. In addition, it is not limited to pins and grooves.
A gear is fixed to the roller shaft, and a gear that meshes with the above gear is fixed to the drive shaft that drives the roller shaft, and the backlash of both gears is increased to provide play. The front ends of the sheets may be aligned by performing an action similar to that of the pin 15 and the groove 22b. Alternatively, the one-way clutch 21 may not be provided on the roller shaft 14, but the spring force of the sheet presser 8 may be adjusted to cause the sheet 7 to slip as appropriate to provide the same effect 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 unit, 7... Seat, 7a... Short sheet, 7b... Long sheet, 8... Sheet presser, 9
... Sheet conveyance path, 10, 14, 17 ... Roller shaft, 11 ... Bearing, 12, 16, 18 ... Pulley, 13, 19 ... Belt, 15 ... Pin, 20
...Motor, 21 ...One-way clutch, 2
2, 24, 25...Roller body, 22b...Groove,
26... Drive device.

Claims (1)

[Scope of Claims] 1. The stacked sheets 7 are fed one by one by a feed-out auxiliary roller 1 provided in the sheet storage section 6, and a sorting member pressed against the circumferential surface of the roller 2 by a feed-out and sorting roller 2. 5 and the peripheral surface of the roller, the sheets 7 are fed out from the sheet storage section 6 one by one, and the fed sheets 7 are conveyed by a pair of feed rollers 3 and 4. The sorting roller 2 is made up of a roller drive shaft 14 that rotates synchronously with the feed-out auxiliary roller 1 and a roller main body 22 connected to the roller drive shaft 14 with a predetermined amount of play in the rotational direction.
A sheet feeding device characterized in that the sheet feeding device is connected to a driving device 20 that drives the peripheral speed thereof to be faster than the peripheral speed of the feeding/separating roller 2.