JPH01242330A - Paper separating device - Google Patents

Abstract

PURPOSE:To prevent the disorder of the intervals between sheets of paper after separating by providing two friction members in such a way that a small- area member is brought into contact with a sheet of paper prior to a large-area member on a pickup roller. CONSTITUTION:The first sheet of paper 1a before carrying out a separating operation tends to rise upward without reaching a separating means 7. At this time, a pickup roller 3 is rotated and a friction member 3a having a small area is brought into contact with the sheet of paper 1a, sending out the end of the sheet of paper 1a up to the separating means 7. Then, as the pickup roller 3 is rotated bringing a friction member 3b having a large area into contact with the sheet of paper 1a, the sheet of paper 1a is separated and conveyed due to its frictional conveying force and the frictional conveying force of the friction member 4a of a feed roller 4. Since the friction member 3a having a small area which is installed on the circumference of the pickup roller 3 is brought into contact with a sheet of paper prior to the friction member 3b having a large area, the sheets of paper can be delivered always at a constant timing.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a device for separating and conveying paper sheets stored in a hopper one by one, such as in automatic teller machines, optical readers, etc. The present invention relates to a paper sheet separation device configured as described above.

[Conventional technology]

As described in Japanese Patent Laid-Open No. 56-65733, the conventional device has two friction members with different friction coefficients attached to the pickup roller to eliminate disturbances in the spacing between sheets after separation and to maintain a constant They were separated and transported at intervals.

[Problem to be solved by the invention]

The above-mentioned conventional technology has the drawback that the pick-up roller is expensive to manufacture because two friction members having different coefficients of friction are attached to the pick-up roller.

SUMMARY OF THE INVENTION An object of the present invention is to provide an inexpensive pickup roller for separating and conveying paper sheets at regular intervals without causing any disturbance in the distance between the separated sheets.

[Means to solve the problem]

The above object is to provide an apparatus in which paper sheets stored in a hopper are sent out one by one to a separating means by a pickup roller, and the pickup roller is provided with two friction members having different areas and a non-friction member between the two friction members. , the small-area friction member is attached so as to come into contact with the paper sheets before the large-area friction member, and the large-area friction member cooperates with a feed roller constituting the separating means to separate and convey the paper sheets. This is achieved by previously delivering the sheets to the separating means for a short time.

[Effect]

In the present invention, the friction member attached to the pickup roller has the function of sending paper sheets to the separating means, at this time,
When paper sheets come into contact with a friction member with a small area, the paper sheets are sent to the separation means during the short period of time that they are in contact with the friction member, but the friction on the feed roller that constitutes the separation means increases. Until the member reaches the separating section, it will not be sent beyond the separating section, and if the sheet comes into contact with the large-area friction member, the sheet will also be sent to the separating means. At the same time, the paper sheets can be separated and conveyed in cooperation with the friction member in the feed roller.

In this way, since the separated filter paper sheets always reach the separating section, disturbances in the spacing between the paper sheets after one separation can be prevented, and the paper sheets can be separated and conveyed at constant intervals.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In FIG. 1, when paper sheets 1 are put into the hopper 2, the push plate 2a of the hopper 2 moves forward, and the paper sheets 1 are pushed into the front plate 2b.
and lightly press it against the pickup roller 3. The pickup roller 3 is directly connected to the feed roller 4 by a timing belt 5, and both rotate synchronously.

A friction member 3a with a small area and a friction member 3b with a large area are attached on the circumference of the pickup roller 3, and a friction member 4 is attached on the circumference of the feed roller 4.
a is installed. A friction member is attached to the circumference of the gate roller 6, and the gate roller 6 is stopped during the separation operation of the paper sheets 1. As shown in FIG. 2, the feed roller 4 and the gate roller 6 are, for example, intricately connected to each other and constitute a separating means 7. Here, 9 is a stop roller whose circumferential surface is made of a non-friction member all around.

In this state, the large area friction member 3b of the pickup roller 3
rotates in FIG. 1 and, when engaged with the first sheet 1a, pushes the sheet 1a downward. At this time, paper sheets 1
The friction member 4a of the feed roller 4 applies a force in the direction of feeding out the paper sheet 1a to the leading edge of the paper sheet 1a, and since this is stopped from the gate roller 6, the force that tries to stop the paper sheet 1a occurs.

As a result, if two or more paper sheets 1 form a shape and enter the separating means 7, only the paper sheets 1a on the feed roller 4 side are conveyed, and the paper sheets on the gate roller 6 side are transported. Since the paper sheets 1 are stopped, the stacked paper sheets 1 are separated one by one.

In such a device that feeds out and separates paper sheets using frictional force, it is required that the distance between the picked-up paper sheets is always approximately constant. In other words, when separating and conveying banknotes as paper sheets and discriminating them, if the intervals between the banknotes are too small and they are too close together, a problem arises in that the preceding banknotes cannot be recognized in time. Furthermore, even if the banknote is determined to be defective, the gate mechanism for ejecting the banknote may not be able to respond in time, which significantly reduces the reliability of the entire device.

FIGS. 3 to 5 show the operation of the embodiment of the present invention in which the intervals between the sheets taken out are approximately constant.

Figure 3a) shows the state immediately before the small-area friction member 3a attached to the circumference of the pickup roller 3 contacts the paper sheet 1a, and generally shows the first sheet before the separation operation. As shown in this figure, the paper sheet 111a may not reach the separating means 7 and may barely rise upwards. At this time, the pickup roller 3 rotates and the small-area friction member 3a comes into contact with the paper sheet 1a, and the leading edge of the paper sheet 1a is sent to the separation means 7 as shown in FIG. 3b). Next, when the pickup roller 3 rotates and the large-area friction member 3b comes into contact with the paper sheet 1a, the frictional conveying force and the I-poly conveying force of the friction member 4a of the feed roller 4 cause the friction member 3b in FIG. As shown, paper sheets 1a are separated and conveyed.

As described above, even if the leading edge of the paper sheet 1a before being separated is not in close contact with the bottom hole 2c, the friction member 3a with a small area attached to the circumference of the pink-up roller 3 will cause friction with a large area. Since the sheet 1a comes into contact with the sheet 1a before the member 3b, the sheet 1a immediately before separation always reaches the vicinity of the bottom hole 2C.

Due to the continuous rotation of the pickup roller 3 and the feed roller 4, the paper sheets are always fed out at a constant timing. That is, as shown in FIG. 4, if the order of paper sheets after separation and conveyance is 1a to 1d, the paper sheet leading edge amount ratio is 111.
Tt*Tz and Ts become approximately constant, and the reliability of the entire device can be improved.

Here, as shown in FIG. 5, the leading edge of the first paper sheet 1a is already in contact with the bottom plate 2C or the separation means 7 immediately before separation.
When the paper sheet 1a reaches the position 8, the front end 8 of the paper sheet 1a may buckle and curl due to the friction conveying force of the small-area friction member 3a attached to the circumference of the pickup roller 3. If this amount of buckling is too large, problems such as damage to the paper sheet or failure to convey it normally will occur, but since the area of the friction member 3a is small, even if the amount of buckling of the paper sheet 1a is Since it is small, it will not be a problem, and since the non-friction member 3C is installed between the friction member 3a with a small area and the friction member 3b with a large area, the friction member 3a with a small area and the first sheet of paper Contact with leaves 1a is completed,
When the non-frictional member 3C and the first paper sheet 1a come into contact, the buckling 8 near the tip can be eliminated by the rigidity of the paper sheet 1a itself. Therefore, even if buckling 8 occurs instantaneously, it is quickly resolved and does not adversely affect the subsequent feeding operation.

In this embodiment, the pickup roller 3 and the feed roller 4 are directly connected and rotated by the timing belt 5, but they may be driven by independent drive sources such as motors.

The area of the friction member attached to the circumferential surface of the pickup roller 3, the area of the friction member 4a of the feed roller 4, and the timing at which it starts contacting these sheets 1a, etc., depend on the width of the sheets to be conveyed and the axis of each roller. It can be selected as appropriate depending on the distance from to the separation means.

In addition, in FIG. 3a), if the paper sheet 1a is skewed diagonally, the frictional conveying force of the small-area friction member 3a attached to the circumference of the pickup roller 3 will cause the paper sheet 1a to skew. When the tip is sent out to the separating means 7 as shown in FIG. 3b), the skew leading side reaches the stopper roller 9 first. At this time, since the outer periphery of the stopper roller is made of a non-frictional material, there is almost no conveying force.
The skew leading side stops at that point, which has the effect of correcting the skew.

〔Effect of the invention〕

According to the present invention, paper sheets are separated and conveyed. It is possible to always precede the operation by pushing the paper sheets downward and aligning the leading edge of the paper sheets with the position of the separating means, eliminating disturbances in the spacing between the paper sheets being separated and conveyed and filtering them. Since the paper sheets have an effect of aligning their take-out phases, even paper sheets with folds can be stably separated and conveyed at constant intervals.

Furthermore, even if the phenomenon of buckling of the leading edge occurs immediately before the sheet separation operation, the amount of buckling is small and can be quickly resolved, so it will not have a negative effect on the separation operation. .

Further, if the friction members attached to the circumferential surface of the pickup roller and having different areas are made of the same material, manufacturing costs can be reduced.

Also, if a stopper roller is used together with the feed roller shaft,
It has the effect of correcting skewed paper sheets and also has the effect of improving separation performance.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the paper sheet separation device of the present invention, FIG. 2 is a schematic diagram showing the positional relationship of each roller in FIG. 1,
FIG. 3 is a diagram illustrating the state of taking out filter paper sheets in the present invention, FIG. 4 is a diagram illustrating the interval between paper sheets, and FIG. 5 is a diagram illustrating buckling when taking out paper sheets. 1...Paper sheets, 2...Hopper, 3...Pickup roller, 3a, 3b...Friction member, 3c...Non-friction member, 4...Feed roller, 4a...Friction Members, 5... timing belt, 6... gate roller,
7...Separation means. 8...Buckling part. \,fl・! lI, 1st/12th] 2nd bacterium q S1 Noah Loaf

Claims (1)

[Claims] 1. In a device that sends paper sheets stored in a hopper one by one to a separating means by a pickup roller, two friction members with different areas are attached to the pickup roller,
A feed in which the small area member is attached so as to come into contact with the paper sheet before the large area member, a non-friction member is provided between the small area member and the large area member, and the large area friction member constitutes a separating means. A paper sheet separating device characterized in that the paper sheets are sent to the separating means for a short time before being separated and conveyed in cooperation with a roller.