JPH01150647A - Paper sheet carrier - Google Patents

Abstract

PURPOSE:To prevent degradation of processing capacity in following processes, in a carrier of paper sheets such as postal matter, by detecting the amount of paper sheets mounted on a carrying means and controlling the carrying speed to low level if the amount is higher than a predetermined level. CONSTITUTION:A detector 11 in an amount detecting section 7 detects the amount of postal matters collected from posts in the way of carriage from a carry belt 3 to another carry belt 5, and a sensor input circuit provides a detection signal to CPU. If the amount of the postal matters detected through the detector 11 is large, carrying speed of a carry motor is switched to an intermediate speed through CPU. A large amount of postal matters 1 carried with intermediate carrying speed through the carry motor are fed sequentially to a duster section 13 where they are scattered and fed to a thickness selecting section 15. When large amount of postal matters 1 are scattered at the duster section 13, CPU switches the input terminal of a select circuit from high to low level.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a paper sheet conveying device that transports paper sheets among devices for arranging paper sheets.

(Prior art) Generally, mail items (paper sheets) collected from a postbox are placed in a mail bag and transported to a post office, and then taken out from the mail bag (
The bag is opened) and placed on a sorting table (not shown). At the sorting table, workers remove large objects, rolls, etc. that are unsuitable for mechanical processing. A conventional paper sheet conveying device supplies the removed postal matter to a thickness sorting section using a conveying belt. A grouping main part is provided in the middle of this conveyance device to spread out the paper sheets when they are conveyed in a group.・This grouper main part has an elastic member attached to the rotating shaft. A thickness sorting section is provided at the rear stage of the conveyance device. The thickness sorting section to which the mail items are supplied removes thick items (mail items exceeding 61 cm) and non-standard size mail items, and conveys the standard size mail items to the stamping section.

(Problems to be Solved by the Invention) Among the above-mentioned mail processing, the conventional paper sheet conveying device is
When mail from Oita was transported from the sorting table, it was not possible to spread it sufficiently in the main part of the grouper.

For this reason, the mail pieces are conveyed in batches to the thickness sorting section at the rear stage of the conveyance device. There is a problem in that when a large number of mail items are transported, the thickness selection section cannot perform sufficient thickness selection. For this reason, variations occur in the throughput of mail thickness sorting in the thickness sorting section, resulting in a decrease in processing efficiency. When a large amount of mail is conveyed from the conveyance device to the thickness sorting section, the thickness sorting section may also reject mail within a certain thickness, which may reduce the reliability of the apparatus.

This invention was made in view of the above, and its purpose is to
An object of the present invention is to provide a paper sheet conveying device capable of supplying paper sheets to a subsequent process.

[Structure of the Invention] Means for Solving the Problems) In order to achieve the above object, the present invention provides m-detecting means for detecting the amount of paper sheets placed on a conveying means, and m-detecting means. The present invention further comprises a speed control means for reducing the conveying speed of the conveying means if the number of paper sheets detected is above a certain maximum.

(Function) In the paper sheet conveying device having the above-mentioned configuration, the end of the paper sheets placed on the conveying means is detected, and if the quality of the detected paper sheets is equal to or higher than a certain value M, the conveying means Since the transport speed is controlled to a low speed, paper sheets can be stably supplied to the subsequent process.

(Example) Hereinafter, the present invention will be explained in detail using the drawings.

FIGS. 1(a) and 1(b) are configuration diagrams showing one embodiment of the paper sheet conveying device of the present invention, FIG. 1(a) is a side view of the device, and FIG. ) is a plan view of the device.

Generally, mail items 1 collected from a mailbox are placed in a mail bag and transported to a post office, where they are removed from the mail bag and placed on a sorting table (not shown). At the sorting table, workers eliminate people, scrolls, etc. that are unsuitable for mechanical processing.

In this way, the mail 1 is conveyed from the sorting table onto the conveyor belt 3. A conveyor belt 5 is installed obliquely at the upper left side in the figure to receive the mail 1 from the end of the conveyor belt 3. A suspension detection section 7 is installed near the middle of the conveyor belt 5 in the conveyance direction F. The amount detection section 7 is a dogleg-shaped member 9 centered on a shaft 8, and a roller 10 is provided at the tip of the conveyor belt 3 of this member 9. This roller 10 is moved in the conveying direction by the conveying belt 5.
When it comes into contact with the mail piece 1 being conveyed to the
Rotate around the center. In response to this rotational movement, the member 9 rotates so as to block the detector 11. Further, in the amount detection section 7, as shown in FIG. 1(b), suspension detection sections 7a, 7b, 7c, and 7d are arranged at equal intervals across the width of the conveyor belt 5. These mother detectors 7a to 7d are rotated by the roller 10 at the tip in response to the movement of the mail piece 1 conveyed by the conveyor belt 5 for each of the mother detectors 7a to 7d, as described above. In addition, the detector 11 includes ■detecting portions 78 to
Detectors 11a to 11h are provided on both sides of 7d,
The m of the mail piece 1 is detected from the light m that responds to each mail piece 1 of the ω detection units 7a to 7d. The detector 11 has a structure including a light emitting element and a light receiving element, and detects the base of the mail piece 1 conveyed by the conveyor belt 5 by receiving incident light accompanying the rotational movement of the member 9.

A leaflet part 13 is installed near the end ('J) of the conveyor belt 5 above the detector 11 to diffuse the mail pieces 1 conveyed by the conveyor belt 5.
Rubber belts are attached in four directions around the shaft 14a, and rotate in the α direction by driving a driving device 14b that rotates around the shaft 14a.

Due to this rotation, the duster section 13 evenly spreads and supplies the mail 1 conveyed from the conveyor belt 5 to the thickness sorting section 15 (post-process). A thickness sorting section 15 is installed at the bottom of the lettering section 13 for sorting the thickness of the mail pieces 1 spread by the lettering section 13. This thickness selection section 15 is
The thickness of mail item 1 is divided into sections 17 and 17 by A.
, B, and C, and has a storage section 19 at the lower end of the section 17 for storing mail items 1 other than those specified. The allocation is upper and lower A provided in section 17,
The three stages B and C are provided alternately in a direction perpendicular to the transport direction F. For this reason, the mail pieces 1 spread by the filtering section 13 are repelled by the belt of the section 17 and are successively sorted by thickness from stage A to stage B to stage C. In this way, since the distribution section 17 rotates at a constant speed, the feeder section 13
Among the mail pieces 3 spread out by the filter, standard size mail pieces with a thickness of, for example, 6 mm or less are selected. The mail pieces 1 sorted by the sorting unit 17 are conveyed to a stamping unit (not shown) by a conveyor 23 via a chute 21 provided at the end of the thickness sorting unit 15. .

FIG. 2 is a block diagram showing the structure of the paper sheet conveying device explained in FIG. 1. Each device shown in the figure is arranged in the control section of the transport device. This control section includes a sensor input circuit 25, a CPU 27, a timer circuit 29, a selection circuit 31, a transport motor drive circuit 33, and a relay box 3.
5.

The optical sensor input circuit 25 outputs a detection signal to the CPU 27 in response to the degree of brightness and darkness received by the detector 11. The CPU 27 controls the entire device, and controls each circuit based on a detection signal input from the sensor input circuit 25.

The two timer circuits store in memory in advance the delay time from when the first detection unit 7 detects the large M) mail piece 1 until the large size mail piece 1 arrives at the filtering unit 13, and
When the detection signal is input from U27, the CPU
A signal is output to 27.

Further, the timer circuit 29 controls the CPU 2 after the delay time.
In response to the signal output to the select circuit 7, a medium speed drive signal, which is lower than the normal speed of the conveyor belt 5 input from the CPtJ 27, is output to the select circuit 31.

The selection circuit 31 receives a full-speed drive signal input from the CPU 27 that is higher than the normal speed of the conveyor belt 5 and a medium-speed drive signal input from the timer circuit 29, and receives a switching signal input from the CPU 27 through input terminals. The signal is output to the relay box 35 in response to the signal. This switching signal sets the input terminal of the select circuit 31 to a low level in order to increase the speed of the drive signal if the mail piece 1 on the conveyor belt 5 is small, and drives the drive signal if the mail piece 1 on the conveyor belt 5 is human. Set the input terminal to high level to slow down the signal.

The conveyor motor drive circuit 33 receives a control signal from the CPU 27 to control the drive of the conveyor belt 5, and also controls the speed of the conveyor belt 5 in response to a drive signal from the relay box 35.

The relay box 35 outputs a drive signal input from the selection circuit 31 to the transport motor drive circuit 33.

FIG. 3 is a diagram showing the waveform of the motor drive signal.

In the same figure, the drive signals a to C are negative logic,
A low level indicates on, and a high level indicates off. a is a waveform at full speed when a transport motor (not shown) is transporting at high speed. When the sensor input circuit 25 detects that the amount of mail 1 on the conveyor belt 5 is small, the drive signal waveform a is output from the CPU 27, and the conveyor motor drive circuit 33 drives the conveyor belt 5 at a higher speed than normal. The mail 1 on the conveyor belt 5 is conveyed to the thickness sorting section 15. b is a signal sent from the CPU 27 to the conveyor motor drive circuit 33 when the sensor input circuit 25 indicates that the thickness of the mail 1 on the conveyor belt 5 cannot be normally sorted by the thickness sorter 15;
This is the waveform output to. C is mail 1 on conveyor belt 5
When the drive signal is not carried, the waveform of this drive signal is
When the signal is output from 27 to the transport motor drive circuit 33, the transport belt 5 stops.

Next, the operation of this embodiment will be explained.

First, the mail 1 collected from the mailbox is sorted on the sorting table (
(not shown), and the worker removes large items, scrolls, etc. that are unsuitable for mechanical processing. The remaining mail pieces 1 are transferred from the conveyor belt 3 to the conveyor belt 5, and the detector 11 detects the amount of the mail pieces 1 on the conveyor belt 5. A signal is output.

At this time, if a large amount of mail 1 is detected by the detector 11, the CPU 27 outputs a detection signal to the timer circuit 29. In response to this detection signal, the timer circuit 29 transmits the signal from the predetermined address of the memory to CPLJ 2 after a delay time.
Output to 7. When the signal is input, the CPU 27 switches the input terminal of the select circuit 31 to a high level. When the input terminal switches to high level, the select circuit 31 outputs a medium speed drive signal to the relay box 35.

Further, the CPU 27 outputs a control signal to the transport motor drive circuit 33 after the delay time. When the control signal is input, the transport motor drive circuit 33 switches the transport speed of the transport motor (not shown) to medium speed in response to the drive signal input from the relay box 35. When a large amount of mail 1 is conveyed to the leaflet section 13, the conveyance motor is driven at a medium conveyance speed, and the large amount of mail 1 is sequentially conveyed to the leaflet section 13 and spread by the leaflet section 13, so that the thickness It is supplied to the sorting section 15. When a large amount of mail 1 is spread by the duster section 13, the CPU 27 switches the input terminal of the selection circuit 31 from high level to low level. When the input terminal switches to low level, the select circuit 31 outputs a full speed drive signal a to the relay box 35. Also, C.P.
U27 outputs a control signal to the transport motor drive circuit 33 to switch from medium speed to full speed. Further, the transport motor drive circuit 33 receives a full speed drive signal a from the relay box 35.
Enter. The transport motor drive circuit 33 controls the transport motor to full speed in response to the drive signal a from the relay box 35.

In the above-described operation, the conveyance speed of the conveyor belt 5 is controlled according to the size of the mail piece 1 on the conveyor belt 5.

In this embodiment, the mail 1 is placed on the conveyor belt 5, for example, at 7c.
Even when the object is conveyed to the detection section 7d in a biased manner, it can be controlled in the same manner as in the above embodiment.

As a result, since a constant number of mail items 1 are always supplied to the thickness sorting section 15, the throughput of the thickness sorting section 15 is not reduced.

This embodiment is not limited to automatic mail sorting, sorting, and stamping.
It can also be applied to a conveyance device that conveys paper sheets such as mail.

[Effects of the Invention] As explained above, according to the present invention, the amount of paper sheets placed on the conveying means is detected and the ω of the detected paper sheets is
If it exceeds a certain level, the conveyance speed of the conveyance means is controlled to a low speed, so that the throughput of the subsequent process is not reduced.
Paper sheets can be supplied to subsequent processes.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the paper sheet conveying device of the present invention, FIG. 2 is a block diagram showing control of the paper sheet conveying device of the present invention, and FIG. 3 is a block diagram showing the control of the paper sheet conveying device of the present invention. FIG. 1... Mail 3, 5... Conveyor belt 7
... Mother detection section 11 ... Optical sensor 15 ...
・Thickness sorting section 17...Distribution is done by section 23...Distribution is done by belt 25...Hincer input circuit 27...CPU 29...Timer circuit 31...Select circuit 33...WI Transmission motor drive circuit 35... Relay box agent block 1 hitter 3! 1.7-1'g Male W, 2
Figure 3

Claims (1)

[Scope of Claims] An apparatus for placing paper sheets on a conveyance means and conveying the paper sheets to a subsequent process, comprising: an amount detection means for detecting the amount of paper sheets placed on the conveyance means; A paper sheet conveyance device comprising: a speed control means that reduces the conveyance speed of the conveyance means if the amount of paper sheets detected by the amount detection means is equal to or greater than a certain number of times.