JPH1159931A - Paper sheet separation and delivery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the risk of duplicate feed irrespective of the diameter of a feed roller, etc., by providing a pickup roller in which a part of its outer circumference is formed of a material of high coefficient of friction and the rest is formed of a material of low coefficient of friction, and mounting a shaft of the pickup roller on the other end of a bracket provided on a shaft of a feed roller and turning it. SOLUTION: A pickup roller 1 whose outer circumferential surface is formed of a material of low coefficient of friction, is mounted on a bracket 8 which is turnable with a feed roller shaft 7 as a center of rotation together with a pickup roller shaft 3, and pressed downward by a spring. An eccentric cam 13 is mounted on the other end of an idler shaft, and the pickup roller 1 is turned in the vertical direction through the bracket 8 at the constant period as the feed roller shaft 7 is turned in an abutted condition on a cam follower 15 fixed to a frame 14. The risk of duplicate feed can be reduced irrespective of the diameter of the feed roller 4 and the pickup roller 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper sheet separating and feeding device used for, for example, a bill separating and feeding portion of an automatic deposit payment device.

[0002]

2. Description of the Related Art A conventional apparatus of this kind is disclosed in
As described in JP-B-68335, a part of the outer periphery of a pickup roller that is pressed against a sheet stacked on a stacking unit at a constant pressure and feeds out the sheet is a member having a high coefficient of friction, and the remaining part is used. Is a member having a low coefficient of friction, the length of the member having a high coefficient of friction is a length necessary to feed the paper sheet from the stacking unit to the feed roller, and when performing continuous separation and feeding, the pickup roller The first sheet is fed out by rotating the pickup roller in a state where the portion having a high coefficient of friction is pressed against the sheet, and when the second sheet comes into contact with the pickup roller, the pickup roller is rotated. By setting the phase of the friction coefficient of the outer periphery to be low, it is possible to prevent the second sheet from being fed out at the same time.

[0003]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. 1-68.
The conventional apparatus described in Japanese Patent No. 335 is configured to feed out one sheet while rotating the feed roller and the pickup roller once. In order to prevent double feed in a state where two sheets are overlapped, A diameter that can ensure an outer peripheral length equal to or greater than the length of the paper sheet handling the feed roller and pickup roller in the feed direction, plus the length of the interval between the paper sheets to be transported one by one. I needed to. Therefore, when handling paper sheets that are long in the feed direction, it is necessary to increase the diameters of the feed roller and the pickup roller, and there is a problem that it is difficult to reduce the size of the apparatus.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a small-sized sheet separating and feeding device irrespective of the length of a sheet to be handled in the feeding direction.

[0004]

In order to achieve the above object, guides for guiding paper sheets to the feed roller are provided on both sides of the pickup roller at positions retreated from the outer peripheral surface of the pickup roller. A part of the outer periphery of the pickup roller is a member having a high friction coefficient, the remaining outer part is a member having a low friction coefficient, a rotatable bracket is provided on a shaft of the feed roller, and the pickup roller is provided at the other end of the bracket. Attach the shaft of
The feed roller shaft is rotatable around the shaft, and a gear is attached to each shaft of the feed roller and the pickup roller, and an idler gear and a shaft that comes into contact with each gear are attached to the bracket. At the same time as transmitting the rotational force to the shaft of the pickup roller, an eccentric cam is attached to the shaft of the idler gear, and a cam follower for abutting the eccentric cam on a frame separate from the bracket and constituting the sheet separating and feeding device. A roller is provided, and by rotating the feed roller and the pickup roller, the bracket and the pickup roller are rotated around the feed roller shaft, and the outer periphery of the pickup roller is retracted from the guide to a position where the outer periphery of the pickup roller is retracted. It is designed to release the constant pressure necessary to feed out the leaves, and by changing the gear ratio of the gear of the idler shaft with the eccentric cam, the gear of the feed roller and the gear of the pickup roller, to change each rotation cycle Thus, the intermittent feeding cycle is enabled regardless of the diameters of the feed roller and the pickup roller.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A mechanism of a sheet separating and feeding device according to one embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a plan view of a sheet separating and feeding apparatus, and FIG. 2 is a side view thereof. The feed roller 4 attached to the feed roller shaft 7 and the gate roller 5 whose entire circumference is made of a high friction coefficient member and which does not rotate in the transport direction are arranged so as to face each other in the axial direction and overlap with each other. ing. Further, the pinch roller 6 is located at a position facing the feed roller 4 and is pressed against the feed roller 4 by the pressing force of the spring 19. A pickup roller 1 having an outer peripheral surface made of a member having a low friction coefficient includes a high friction member 2 on a part of the outer periphery, and a bracket rotatable around a feed roller shaft 7 together with the pickup roller shaft 3. 8 and is pressed down by a spring 20. The sheets 18 stacked on the vertically movable push plate 17 are pressed against the pickup roller 1 by a spring 21 at a constant pressure. Also the spring 20
The spring 21 and the spring 21 are designed to sufficiently increase the spring force of the spring 20 with respect to the spring 21 so that the position of the pickup roller 1 does not change when the paper sheet 18 is fed.

A gear 9 is provided at an end of the feed roller shaft 7, and the rotation is transmitted to a gear 10 attached to the pickup roller shaft 3 via an idler gear 11 and an idler shaft 12. An eccentric cam 13 is attached to the other end of the idler shaft so as to come into contact with a cam follower 15 fixed to a frame 14. 8 to rotate up and down. Further, a guide 16 is arranged above the outer peripheral surface of the pickup roller at a lowermost position by a predetermined amount. The guide 16 may be provided with one guide roller 22 or a plurality of guide rollers 22 in the axial direction in order to reduce the resistance caused by the guide 16 when the paper sheet 18 is fed out.

Next, an example of a sheet separating operation will be described with reference to FIGS. FIG. 2 shows a state immediately before the uppermost sheet 18a of the stacked sheets 18 is fed out, and FIG.
2 shows the state after one rotation of the feed roller shaft from the state of FIG. 2 (just before the second rotation) when the gear ratio of the gear 9 of the feed roller shaft 7 to the idler gear 11 of the idler shaft is 1: 2. Show.

As shown in FIG. 2, when trying to sequentially feed out the stacked paper sheets 18, the paper sheets 18
And the pressing plate 17 are pressed against the pickup roller 1, and the high friction member 2 is sequentially pressed against the paper sheet 18 a and rotated with the rotation of the pickup roller 1 to rotate the paper sheet 18 a.
Is fed to the overlap point between the feed roller 4 and the gate roller 5 and is reliably fed by the high friction member 2 at least until the leading end of the sheet 18a reaches the pressure contact between the feed roller 4 and the pinch roller 6. Thereafter, the outer peripheral portion, which is a low friction portion of the pickup roller 1, comes into contact with the paper sheet 18a, and the feed force of the pickup roller 1 is lost.
The sheet 18 is fed by the feed roller 4 and the pinch roller 6.
a is continuously sent to the next transport path (not shown).

[0010] As shown in FIG.
Is rotated once, and in the second rotation state in which the high friction member 2 is in the lower phase in contact with the paper sheet, the idler shaft 12 is in a half-rotation state, and the eccentric cam 13 attached to the idler shaft 12 and Cam follower 15 fixed to frame 14
Pickup roller 1 via bracket 8
Is rotated to a position where the outer peripheral surface is higher than the lower surface of the guide 16, and the pressure required for feeding is released from the paper sheet 18. Therefore, the rear end of the paper sheet 18a passes through the lower part of the pickup roller 1, and the next paper sheet 18a
Even when b is in a position where it contacts the pickup roller 1, the feeding force by the high friction member 2 is not transmitted to the paper sheets 18b, and the sheets can be separated and fed one by one without double feeding.

FIGS. 2 and 3 show the case where the gear ratio between the gear 9 and the gear 11 is 1: 2 and one sheet is fed by two rotations of the feed roller shaft 7 and the pickup roller shaft. By changing the gear ratio of the gear 11 and the gear 11, the cycle of intermittent feeding by the high friction member 2 can be changed.

Next, an example of the separating operation in the case where the lengths of the paper sheets handled in the feed direction are mixed and large will be described with reference to FIGS.

FIG. 4 shows sheets 1 stacked in the same manner as in FIG.
8 shows the state immediately before feeding 8. The uppermost sheet 18c of the sheet 18 has a small length in the feeding direction. The sheet 18c is fed out by the high friction member 2 with the rotation of the pickup roller 1 as in FIG.

FIG. 5 shows the state at the moment when the sheet 18c is fed and its rear end passes below the pickup roller 1, and the next sheet 18d and the pickup roller 1 start to contact. The phase of the eccentric cam is in a state before the position of the pickup roller is raised upward, and the sheet 18 d is pressed against the pickup roller 1 by the pressure of the spring 21, and the pressure required for feeding is applied. The phase of 1 passes through the high friction coefficient member 2,
Since the low friction portion is in contact with the paper sheet 18d, the paper sheet 18d is not fed. Thereafter, the height of the pickup roller 1 becomes the height at which the pressure required for feeding is applied, and the high friction member 2 comes into a phase in which it comes into contact with the paper sheet 18d. It is paid out.

Next, a mechanism of a sheet separating and feeding apparatus which is another embodiment different from the embodiment described with reference to FIGS. 1 to 5 will be described with reference to FIGS. 6 and 7. FIG.

FIG. 6 is a plan view of the paper sheet separating and feeding device, and FIG. 7 is a side view thereof. In the embodiment of FIGS. 1 to 5, the guide 16 having the guide roller 22 is fixedly attached, but the guide bracket 23 shown in FIGS. 6 and 7 is used.
Is mounted on the feed roller shaft so as to be rotatable, and the guide bracket 23 is provided with a cam follower 15 of the eccentric cam 13.
The bracket 8 rotates vertically with respect to the guide bracket 23 via the eccentric cam 13. Further, the push plate 17 is configured to be arbitrarily movable up and down by a drive source and a drive mechanism (not shown), and the pickup roller 1 and the guide roller 22 are integrated by a suitable spring 24 for feeding out the sheet 18. And a sensor 25 for detecting the position of the guide bracket 23 at which the spring force of the spring 24 is most suitable for feeding out the paper sheet 18. By moving the 17 up and down, a pressure at the time of feeding which is not affected by a change in the number (height) of the stacked banknotes can be realized, and stable separation and feeding can be achieved.

[0017]

According to the present invention, the pick-up roller is formed of a member having a high friction coefficient on a part of the outer periphery, the remaining outer portion is formed of a member having a low friction coefficient, and the bracket is rotatable about the shaft of the feed roller. By retracting from a guide provided at the upper end of the stacked paper sheets, by an eccentric cam mounted on an idler gear shaft that transmits the rotational force of the feed roller to the pickup roller,
The pressure required to separate and feed the paper is released, the gear ratio of the feed roller, pickup roller gear, and idler gear is changed, and the rotation period of the feed roller and pickup roller and the rotation period of the eccentric cam are changed. By arbitrarily changing the timing at which the pressure required for separation is released, it is possible to realize a small-sized sheet separating and feeding device with less risk of double feeding without increasing the diameters of the feed roller and the pickup roller. .

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a side view and an operation explanatory view of the embodiment of the present invention.

FIG. 3 is a side view and an operation explanatory view of the embodiment of the present invention.

FIG. 4 is a side view and an operation explanatory view of the embodiment of the present invention.

FIG. 5 is a side view and an operation explanatory view of the embodiment of the present invention.

FIG. 6 is a plan view of the embodiment of the present invention.

FIG. 7 is a side view and an operation explanatory view of the embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pickup roller, 2 ... High friction member, 3 ... Pickup roller shaft, 4 ... Feed roller, 5 ...
Gate roller, 6 pinch roller, 7 feed roller shaft, 8 bracket, 9, 10 drive gear, 11 idler gear, 12 idler shaft, 13 eccentric cam, 14 frame, 1
5 ... Cam follower, 16 ... Guide, 17 ...
Push plate, 18 ... Paper, 19-21 ... Spring,
22: guide roller, 23: guide bracket, 2
4 ... spring, 25 ... sensor.

Claims (3)

[Claims] 1. A stacking unit for stacking paper sheets, a pickup roller which is pressed against a plurality of stacked paper sheets with a predetermined pressure to feed the paper sheets, and a paper sheet fed by the pickup roller. A feed roller and a guide for guiding paper sheets to the feed roller at a position retracted from the outer peripheral surface of the pickup roller, and a gate made of a high friction coefficient member disposed opposite to the feed roller. In the sheet separating and feeding device in which the sheets are fed one by one by feeding between the pickup roller, a part of the outer periphery of the pickup roller is a member having a high coefficient of friction, and the remaining outer part is a member having a coefficient of friction. A rotatable bracket is provided on the shaft of the feed roller, and the shaft of the pickup roller is provided at the other end of the bracket. Mounting, paper sheet separating and feeding device, characterized in that the rotatable. 2. The paper sheet separating and feeding device according to claim 1, wherein a gear is attached to each shaft of the feed roller and the pickup roller, and an idler gear and a shaft abutting on each gear are attached to the bracket. 2. The sheet separating and feeding device according to claim 1, wherein the rotational force of the shaft of the feed roller is transmitted to the shaft of the pickup roller. 3. The sheet separating and feeding device according to claim 2, wherein an eccentric cam is attached to a shaft of the idler gear, and the eccentric cam and a frame which is separate from the bracket and constitutes the sheet separating and feeding device. By providing a roller for a cam follower to be in contact with, by rotating the feed roller and the pickup roller, the bracket and the pickup roller are rotated, and the outer periphery of the pickup roller is retracted from the guide to a position where paper sheets are retracted. 2. The paper sheet separating and feeding device according to claim 1, wherein a predetermined pressure required for feeding the sheet is released.