JPS6027435B2 - Number inspection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a character recognition device, and more particularly to a number checking device for checking symbols and numbers of securities and lottery tickets.

Consecutive numbers printed on securities, lottery tickets, etc. are printed using a number machine, but due to maladjustment of the printing machine or damage to the number machine part, the printed numbers may be half-returned or incorrect, and may also be smudged or chipped. etc. will occur.

In order to detect such defects in number printing, conventional manual visual inspection has been performed. Visual inspection inevitably leads to inspection omissions and defective products. Therefore, it is an object of the present invention to provide a character recognition device that automatically inspects defective printed numbers such as incorrect numbers and paperbacks.

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

In FIG. 1, a feed stacker 11 stores sheets 12 to be inspected (for example, securities, lottery tickets, etc.).

The sheet 12 to be inspected is pressed in the direction of the arrow by a pressing member 13 provided on the feed stacker 11, as shown in FIG. A feed drum 14 is disposed adjacent to the feed stacker 11. This feed drum 1
A blower 16 is connected to the inside of 4 via an air duct 15. There is an air duct 15 inside the feed drum 14.
The proa 16 is coupled via. feed drum 14
A plurality of holes are provided in the outer circumferential portion 14a of. Further, a wind shield 17 is provided inside the drum 14. Further, a cover member 18 is provided close to the outer peripheral portion 14a of the feed drum 14, and guide rollers 19, 20, 21 are provided.
, 22 are provided. Note that the gap between the feed drum 14 and the roller 19 is configured to be arbitrarily adjustable, and when a thin paper weighing approximately 55 kg is used as the sheet to be inspected, this gap is 1.5 to 1.5 kg of the sheet to be inspected. It is set to correspond to the thickness of the lumber. By setting such a gap, sheets can be accurately fed one by one. Further, the roller 19 is made of a material such as urethane or synthetic rubber. On the other hand, the outer peripheral portion 14a of the feed drum 14 is lined with urethane rubber. As a result, the sheet to be inspected 12 is transferred to the feed drum 1.
4 becomes easy to adsorb. The feed drum 14 feeds the sheet 12 to be inspected by being rotationally driven by the motor 23 at a rotational speed of, for example, a circumferential speed of 186 mm/sec.
It is operated to suck in the air inside 4.

The sheets to be inspected 12 stored in the feed stacker 11 are attracted to the feed drum 14 by the suction force of the air, and are accurately fed one by one at a speed of 4 sheets per second by a roller 19 rotating at a circumferential speed of 2592/sec, for example. be done.
The sheet 12 to be inspected is sent out while being attracted to the feed drum 14, and is sent toward the delivery belt 24 while being held by rollers 20, 21 on the way. When the sheet 12 to be inspected reaches the position of the roller 22, the air suction force is removed by the wind shield 17. Thereafter, the sheet to be inspected 12 is peeled off from the feed drum 14 by the peeling member 25 and sent to the delivery belt 24. Delivery belt 24 is 16
The sheet to be inspected 12 is conveyed at a speed of 00/sec.
This sheet to be inspected 12 is fed into a character recognition system 26, where characters are recognized. In this case, the traveling speed of the sheet 12 to be inspected during recognition is stabilized by the feed roller 28 driven by its own drive motor 27. The recognition system 26 includes a light source 26a and an image receiving device such as an ITV 26b, and optically picks up, for example, a number printed on the sheet 12 to be inspected. This recognition system 26G is configured to recognize the picked up numbers by a similarity method. That is, the vector inner product of the figure data 〆 corresponding to the picked up number and the reference font ◇ =
(Na.0)2 arithmetic processing is performed by a microcomputer consisting of registers, memory, and the like. At this time, bottom information corresponding to the bottom of the number is captured. This bottom information is used to check for irregularities in the sequence of numbers, ie, "half-returns." This “half-turn”
When checking, the bottom maximum value B and minimum value Bmin are detected, and a half-return check is performed by filling in the judgment formula ≧IB job - Bminl. In this embodiment, the IB side-Bmjnl is set to x and X=4 bits. That is, the number of bits should be 4 bits. In this case, 1 bit≠0.12 enemy/skin, that is, the ZO. 48/skin. That is, the 0.48 side or more is detected as a half-turn. As mentioned above, the number is recognized by the similarity method, and a half-return check is performed based on the bottom information. If it is determined that the printing is good through the number recognition and half-return check, the inspected sheet 12 that has been inspected is sent to the paper discharge roller 29 .

This pseudo paper roller 29 rotates at a circumferential speed of 160 mounds/sec, and at this speed, the sheet to be inspected is placed on the paper discharge stacker 30.
Send 2. In this case, the sheet 12 to be inspected is
Belt 3 running at 185 r/sec due to 1
2 and is forcibly put into the paper stacker 30 by this belt 32. When the sheets to be inspected are placed in the discharge stacker 301 in this manner, there is no paper jam and the sheets are aligned in a very good condition. The belt 32 is made of synthetic resin, and the belt 32 is made of the material of this belt.
It is preferable to use a paper that does not stain due to friction even if the paper is rubbed with a round object. If the recognition system 26 determines that there is a printing defect, the number inspection device is stopped and at the same time, the number information of the defective printing is recorded and displayed.

As described above, according to this invention, 6-digit numbers are recognized at a speed of 4 per second, and in addition to number differences, number continuity,
Dirt, chips, and irregular numbers can be detected.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a number inspection device according to an embodiment of the present invention, FIG. 2 is a plan view of the periphery of the feed drum, and FIG. 3 is a plan view of the periphery of the discharge stacker. 11... Feed stacker, 12... Sheet to be inspected, 14''''Feed drum, 16'''' Floor, 17... Wind shield, 24... Delivery belt, 26 ... Recognition system, 30 ... Paper discharge stacker, 31 ... Guide, 32 ... Belt. Fig. 2 Fig. 3

Claims (1)

[Claims] 1. A feed drum that has a peripheral portion that sucks a large number of sheets to be inspected accumulated in a feed stacker by vacuum suction and feeds out the sheets to be inspected one by one, and a conveyor that conveys the sheets to be inspected sent from this feed drum. a mechanism section, a means provided in the conveyance mechanism section for optically picking up the printed number of the sheet to be inspected that is continuously conveyed, and a means for recognizing the picked up printed number and corresponding to the bottom of the printed number. means for reading bottom information, determining whether or not the difference between the maximum value and the minimum value of the bottom information of each number exists within an allowable range, and inspecting half-turning indicating an irregular arrangement of the printed numbers; and a conveyance mechanism. A number inspection device comprising a discharge stacker for stacking inspected sheets discharged from a section.