JPS63267658A - Paper sheet accumulation mechanism - Google Patents

Abstract

PURPOSE:To avoid collision with the following sheet and to prevent the occurrence of a jam by providing means for detecting the passing of the leading and trailing ends of a paper sheet on this side of the first transport path, whereby the second transport path is driven in response to a leading end passing signal and stopped in response to a trailing end passing signal. CONSTITUTION:When the leading end of a paper sheet 12a passes through a photosensor 11 of the first transport path 1, a timer not shown is operated, and after the time of transport to a paper sheet clamping starting point 16 of the second transport path 4, a step motor 10 is driven. When the trailing end of the paper sheet 12a passes, another timer not shown is operated, and after the lapse of time until the paper sheet is run through by a brush 13 of a brush wheel 14 since the trailing end thereof passes through the sensor 11, the step motor 10 is decelerated and stopped. The delivery distance between the paper sheet feed-out point 15 of the transport path 1 and the clamping starting point 16 is less than the half of the length of a normal paper sheet. Accordingly, even if a paper sheet has a length longer or shorter than the normal length as well as the normal length or paper sheets are fed out from the transport path 1, overlapping each other, the paper sheets 12a can be transported with a fixed overlapping amount on the transport path 4 not cause a jam.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a paper sheet stacking mechanism, and particularly relates to a paper sheet stacking mechanism, particularly when the length of the paper sheets to be transported in the transport direction varies or when some of the sheets overlap. The present invention relates to a paper sheet stacking mechanism that is applicable even when paper sheets are conveyed as a group.

[Conventional technology]

As a conventional mechanism of this type, for example, Japanese Patent Application Laid-Open No. 60-2
The one disclosed in Japanese Patent No. 7092 is known.

This mechanism is configured to optically detect banknotes that are conveyed at approximately equal intervals, and then intermittently feeds the banknotes one by one by a specified number of pulses, and stacks some of the banknotes on top of each other. be.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology is suitable for cases in which paper sheets are transported as a single sheet of paper that is long in the apparent main transport direction, such as a group of two or more sheets that partially overlap from the previous transport path, or when handling No consideration has been given to cases where paper sheets include paper sheets whose length in the conveyance direction deviates from the standard value, and there may be cases where two or more sheets overlap or a single sheet If the length of is larger than the normal value, if the rear conveyance path is driven by a certain amount based on the leading edge passing signal of the sheets, the position of the group of sheets or the trailing edge of the sheets when the rear conveyance path stops will be This is different from the case of regular paper sheets, so jams are likely to occur.Also, if the rear conveyance path is driven a certain amount based on the trailing edge passing signal, the group of sheets or the front end of the paper sheets will reach the rear conveyance path. When I did,
There was a problem in that the latter conveyance path had not yet been activated and jams occurred.

Furthermore, when the length of a paper sheet is smaller than a specified value, if the rear conveyance path is driven by a certain amount based on the leading edge passing signal, the trailing edge of the sheet collides with the leading edge of the following sheet. There is a problem in that the trailing paper sheet tends to jam, and when the rear conveyance path is driven by a certain amount based on the trailing edge passing signal, the leading edge of the trailing sheet collides with the trailing edge of the preceding sheet, resulting in a jam. there were.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to solve the above-mentioned problems in the conventional paper sheet stacking mechanism, and to solve the problem of dispersion in the length of the paper sheets being transported in the transport direction. It is an object of the present invention to provide a paper sheet stacking mechanism that can be applied even when there are multiple paper sheets, or when some of them overlap and are conveyed separately from a group of paper sheets.

[Means for solving problems]

The above object of the present invention is to transfer paper sheets, which are discharged one by one at irregular intervals back and forth from a first conveyance path that is continuously driven at a constant speed, through a certain delivery distance. In a paper sheet stacking mechanism in which paper sheets are stacked in a partially overlapping state by utilizing the speed difference between the first and second transport paths on the second transport path, the paper sheets on the first transport path are A means for detecting passage of the front end and rear end of paper sheets is provided in front of the leaf sending unit, and the drive of the second conveyance path is started based on a front end passage signal from the detecting means, and This is achieved by a sheet stacking mechanism configured to stop driving the second conveyance path based on an end passing signal.

[Effect]

In the present invention, not only paper sheets of a regular length with a space between the front and back, but also paper sheets of a length other than the regular length or a group of paper sheets that partially overlap are transported. The rear conveyance path is started when the front edge of one sheet reaches a certain position by the front edge passage detection signal, and the rear conveyance path is stopped by the rear edge passage detection signal when the rear edge of the sheet reaches a certain position. This is done when the paper sheets reach a certain position where they are unlikely to collide with other objects, so that the paper sheets are sent to the subsequent conveyance path with a certain amount of overlap without colliding with each other, thereby preventing jams. Things will go away.

〔Example〕

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

FIG. 1 is a configuration diagram showing an embodiment of the present invention. In the figure, 1 is a front conveyance path for conveying paper sheets 12a one by one at intervals, and 4 is a conveyance path for partially overlapping paper sheets. Leaves 12
12b, 12c, and 12d are shown. The preceding conveyance path 1 is constituted by belts 3a and 3b driven by pulleys 2a and 2b,
Further, the conveyance path 4 at the latter stage is configured to include belts 5a and 5b driven by belts 7a and 7b. In addition, 10 is a step motor that drives belts 5a and 5b that constitute the conveyance path 4 in the latter stage, and 6a to 6.
c indicates a driven pulley.

Paper sheets sent out from the downstream conveyance path 4 are stored in the storage box 9. In addition, a pulley 2 is provided on the conveyance path 1 at the front stage.
A brush wheel 14 having brushes 13 implanted around it and rotating in the same direction on the same axis as b, and a photosensor 11 are provided. Note that the above-mentioned front-stage conveyance path 1 and rear-stage conveyance path 4 are defined by the distance (hereinafter referred to as The paper sheets are arranged so that the "delivery distance" of the paper sheets is less than 1/2 the length of the regular paper sheets.

The latter transport path 4 is driven by a step motor 10 that is controlled based on a signal detected by the photosensor 11. This control method will be explained in detail with reference to the diagram showing the operation control section shown in FIG.

When the front end of the paper sheet 12a passes the photosensor 11, the output signal of the photosensor changes from a light state to a dark state. Using this output signal, timer 1 in the control section is started. In this timer 1, paper sheets 12a
The time required for the front end to be conveyed the distance from the photosensor 11 to the paper sheet nipping start point 16 of the latter conveyance path 4 to the time required for the step motor 10 to reach the target speed from the start of driving. A pre-calculated time is set, and when the timer 1 reaches this time (time-up), the step motor IO starts to be driven through the step motor drive driver. At this time, the drive speed of the step motor 10 is set so that the conveyance speed during driving of the conveyance path 4 in the latter stage is equal to or less than the constant conveyance speed of the conveyance path 1 in the former stage.

On the other hand, when the rear end of the paper sheet 12a passes the photosensor 11, the output signal of the photosensor changes from a dark state to a light state. Using this output signal, timer 2 in the control section is started. This timer 2 indicates that after the rear end of the paper sheet 12a passes the photosensor 11, it is swept down by the brush 13 of the brush wheel 14 like the rear end of the paper sheet 12b (see 1st r4). From the time until
The time required for the step motor 10 to decelerate and stop from the drive speed was subtracted. A pre-calculated time is set.

When the timer 2 reaches this time, the step motor 10 is decelerated through the step motor drive driver.
Stop.

For each paper sheet conveyed on the previous conveyance path 1,
By repeating these controls and controlling according to the flowchart shown in FIG. 3, each paper sheet will be transported on the subsequent transport path 4 with parts of it overlapping by a certain amount of overlap. . In FIG. 3, if paper products of normal length and paper sheets with a long length in the transport direction are fed, steps 21 to 29 are processed, and paper sheets with a short length in the transport direction are fed. If sent, step 2
4 → Steps 30 to 33 → Step 28 → Step 34
This is the process of ~37.

According to the present embodiment, even if two sheets of paper are sent out from the front conveyance path 1 with parts of them overlapping without any gap, by detecting the front end of the first sheet, Rear conveyance path 4
After the is started, the rear end of the first paper sheet and the front end of the second paper sheet are not detected by the photosensor 11.
The sheets are sent to the rear conveyance path 4 while maintaining the same overlap, and upon detection of the trailing edge of the second sheet, the trailing edge conveyance path 4 is stopped at a position where the second sheet is least likely to collide.

Also, when a paper sheet is folded in half and the length in the conveyance direction is half of the original length, it is sent out from the front conveyance path 1.
In the same manner as described above, a certain amount of overlap with the preceding paper sheet is obtained, and the rear end of the folded paper sheet stops at the position where it is least likely to collide.

In the above embodiment, the delivery distance was set to be 1/2 or less of the length of the regular paper sheet, but this is 1/2 of the length of the regular paper sheet, that is, folded in half. This is because it also handles paper sheets, and this size can be set arbitrarily.

In addition, in the above embodiment, the front end of one paper sheet.

Although two timers were used as a means to measure the amount of sheet movement in the rear conveyance path based on the detection signal at the rear end, it goes without saying that other similar means may also be used. .

〔Effect of the invention〕

As described above, according to the present invention, paper sheets are discharged one by one at irregular intervals back and forth from the first conveyance path that is continuously driven at a constant speed.

In a sheet stacking mechanism of a type in which paper sheets are stacked in a partially overlapping state by utilizing the speed difference between the first and second conveyance paths on a second conveyance path where the sheets are fed through a certain delivery distance, A means for detecting passage of the front end and rear end of the paper sheet is provided before the paper sheet discharge part of the first conveyance path, and based on a front end passage signal from the detection means, the second conveyance path is Since the configuration is configured to start the drive and stop the drive of the second conveyance path based on the trailing edge passing signal, if there is variation in the length of the conveyed paper sheets in the conveyance direction, or if some of them This has the remarkable effect that it is possible to realize a sheet stacking mechanism that can be applied even when sheets are overlapped and transported as a group of sheets.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing an operation control section of the embodiment, and FIG. 3 is a flow chart showing the operation of the operation control section. 1: front conveyance path, 4: rear conveyance path, 10 step motor, 11: photo sensor, 13: brush, 14: brush wheel.

Claims (1)

[Claims] 1. From the first conveyance path that is continuously driven at a constant speed,
Paper sheets are released one by one at irregular intervals in the front and back, and are sent through a certain delivery distance onto a second conveyance path, using the speed difference between the first and second conveyance paths. In a sheet stacking mechanism of a type in which sheets are stacked in a partially overlapping state, means for detecting passage of front and rear ends of sheets is provided in front of the sheet discharge section of the first conveyance path. and is configured to start driving the second conveyance path based on the front end passage signal from the detection means and stop driving the second conveyance path based on the rear end passage signal. Paper sheet accumulation mechanism.