JP2012071962A - Foreign matter detecting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide paper sheet thickness fluctuation detecting system, which in more detail, is an inspection system, for example, which performs foreign matter detection when conveying of paper sheet, such as form processing machine, especially continuous sheet of paper.SOLUTION: In the foreign matter detecting system where a movable roller 30 is installed via the continuous sheet of paper 10 on a paper conveying roller 20, signal is reinforced via an arm 40 utilizing the lever rule from position fluctuation of the movable roller 30 and foreign matter detection is enabled with a simple position detection system, resulted in a solution on the above problem.

Description

  The present invention relates to a paper sheet thickness variation detection device, and more particularly to an inspection device that detects foreign matter in a paper sheet conveyance process such as a foam processing machine.

  For the purpose of sending out a continuous form, a punching process in which round holes are punched as feed holes at a constant pitch on both sides of the form is performed on a form such as a continuous form. In the drilling process, a male pin and a female die are set on a wheel, and the wheel is punched by rotating the wheel according to the moving speed of the foam paper.

  When operating normally, punching debris (foreign matter) generated by drilling is discharged through the knife on the female side, but uncertainties such as pin and die wear, momentary meshing failure due to drive impact, etc. Depending on the element, the punching waste is not discharged normally, and it is mixed into the product while adhering to the foam paper, causing defects such as missing printing.

  As a countermeasure against such punch debris, the generated punch debris is removed by blowing air and scraping the paper surface. However, there are problems such as inability to remove by air blowing, mixing into other parts, etc., and scraping the paper surface has not solved the problems such as paper tearing and glue peeling. A method for detecting the residue is being studied.

  As a method for detecting the residual residue, a method for detecting a change in the thickness of the paper is generally used. Examples of the paper thickness detecting device include Patent Documents 1 to 3.

JP 2005-172745 A Japanese Patent No. 444738 JP 2009-3000279 A

The paper sheet thickness detection methods described in Patent Documents 1 to 3 have a problem that the apparatus configuration is complicated and an advanced detection system is required to increase detection accuracy. Accordingly, an object of the present invention is to provide a foreign object detection device capable of performing accurate foreign object detection by a simple method.

The foreign object detection device of the present invention solves the above problems by means described in the following embodiments.

A first aspect of the present invention is a foreign matter detection device that detects foreign matter adhering to a processed continuous paper surface by a foam processing machine that continuously processes continuous paper,
A fixed arm mounting rotary shaft is provided with an arm made of a rigid movable body, a movable roller is provided at one end of the arm, a position detection device is provided near the other end of the arm, and a sheet is conveyed. The movable roller is brought into contact with the roller via the continuous sheet, and the distance between the position detection device and the arm mounting rotation shaft is longer than the distance between the movable roller and the arm mounting rotation shaft. This is a featured foreign matter detection device.

  According to a second aspect of the present invention, in the first aspect, an alarm device is provided that allows an operator to recognize that the position variation of the movable roller has occurred based on an output signal from the position detection device. It is a foreign substance detection apparatus. As for the alarm device in which an abnormality has occurred, it is possible to respond with a sound such as a buzzer, light from an alarm lamp, etc. when an abnormality is detected.

According to a third aspect of the present invention, in the first aspect, the foreign matter detection device is characterized in that the foreign matter occurrence position is recorded on a continuous form based on an output signal from the position detection device. Regarding the recording of the abnormality occurrence position, it is possible to cope with printing, stamping, sticking a tag, etc. on the sheet abnormality occurrence portion.

  According to the first aspect of the present invention, there is an effect that foreign matter can be detected by a simple method.

  According to the second aspect of the present invention, in addition to the effect of the first aspect, there is an effect that it is possible to immediately cope with the occurrence of a foreign object.

According to the third aspect of the present invention, in addition to the effect of the first aspect, it is possible to easily identify the location where the abnormality has occurred by recording the position of the foreign matter occurrence on the continuous paper. effective.

It is the conceptual diagram which looked at the foreign material detection apparatus of 1st Embodiment by this invention from the side. It is the conceptual diagram which looked at the foreign material detection apparatus of 1st Embodiment by this invention from the upper side. It is a conceptual diagram which shows the method of weighting to a movable roller in the foreign material detection apparatus of 1st Embodiment by this invention.

  Hereinafter, foreign object detection according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic view seen from the side of a foreign matter detection device according to the present invention, and FIG. 2 is a schematic view seen from the upper side of the foreign matter detection device according to the present invention. In the figure, reference numeral 10 denotes a continuous form after drilling.

  As shown in FIGS. 1 and 2, the continuous form 10 after drilling is moving on a transport roller 20 that is rotatably fixed by a fixed shaft 21. A movable roller 30, which is rotatably fixed by a rotary shaft 31 fixed to the arm 40, is connected to one end of an arm 40 that is rotatably fixed by a fixed arm mounting rotary shaft 41. 10 is installed. Further, the other end of the arm 40 is installed in contact with a position detecting device 50 made of a micro switch fixed to the casing.

  The pressing of the movable roller 30 against the conveying roller 20 is preferably a constant force. For example, the movable roller 30 can be pressed against the conveying roller 20 by its own weight. Moreover, as shown in FIG. 3, the load by the spring etc. which were attached to the arm 40 may be sufficient. FIG. 3 shows a state in which a load is applied by four springs (61 to 64). These springs use springs that contract, and springs 62 and 63 use springs that apply force to press the movable roller 30 in the direction of the white arrow shown in FIG. Moreover, any one use may be sufficient as the springs 61-64, and arbitrary multiple pieces may be provided.

  In the inventions described in the previous patent documents 1 to 3, in order to detect the thickness abnormality of the sheet-like paper (banknote etc.), it is necessary to detect the accurate thickness. Since the purpose is to detect foreign matter on continuous paper, accurate thickness detection is not necessary. Since it is only necessary to detect abnormal values outside the paper thickness error range and glue thickness error range due to foreign matter adhesion, it is possible to detect abnormalities such as foreign matter adhesion by using inexpensive parts such as micro switches. Become. In addition, in order to detect an accurate thickness, it is necessary to adjust the pressing pressure of the movable roller. However, in the present invention, it is only necessary to detect a change in the position of the movable roller. There is a feature that it is good. The present invention is not limited to the microswitch, and any optical sensor, magnetic sensor, or the like can be used as long as it can detect position fluctuations.

  Based on the principle of lever centering on the arm mounting rotation shaft 41, for example, the ratio of the distance between the arm mounting rotation shaft 41 and the movable roller mounting rotation shaft 31 and the distance between the arm mounting rotation shaft 41 and the position detection device installation position 51 is calculated. By setting it to 1: n, it is possible to amplify the signal intensity n times. If it is 1 or less, the signal intensity decreases, and if it is 5 or more, problems such as an increase in the weight of the arm and an increase in installation area occur. Therefore, the value of n is preferably set to a value greater than 1 and less than 5. . A general continuous form is produced by stacking a single sheet with a thickness of about 75 to 170 microns or a plurality of sheets by gluing. For example, in the case of a single continuous form with a thickness of 75 microns, this paper scrap is also 75 microns. For example, when the value of n is 4, a position variation of 300 microns is detected by the position detector. The The value of 300 microns is a range that can be sufficiently handled by a microswitch. Further, in the case of a continuous form of a plurality of sheets, the position fluctuation becomes a larger value, which is a range that can be handled by a micro switch.

(First embodiment)
The Example of 1st Embodiment of this invention is shown.

    As shown in FIG. 2, the continuous form 10 passes through the foreign object detection device of the present invention after drilling. The position detection device 50 uses a microswitch fixed to the housing. The micro switch used was normally OFF and turned ON when an abnormality occurred.

    The continuous form 10 is a single form of paper having a thickness of 75 microns and having a maximum variation of ± 7.5 microns. The arm 40 is used in which the ratio of the distance between the arm attachment rotation shaft 41 and the movable roller attachment rotation shaft 31 and the distance between the arm attachment rotation shaft 41 and the position detection device installation position 51 is 1: 4. A spring 61 was used to press the movable roller 30 against the conveying roller 20.

    During stable operation, the variation of the paper thickness is ± 7.5 microns at the maximum, the fluctuation of the position detection device 50 at the normal time is a maximum of ± 30 microns, and the variation of the position detection device 50 when the foreign matter is generated is the thickness of the paper. Since it is 300 microns, which is four times 75 microns, the position variation at which the microswitch is turned on was set to 200 microns. The set value may be between 30 and 300 microns, but in order to avoid malfunction, it is preferable to set a value obtained by subtracting 100 microns from the abnormal signal value from an intermediate value between the maximum error value and the abnormal signal value. .

(Second Embodiment)
In the first embodiment, the microswitch is turned on when an abnormality is generated due to an unloading residue, and a mechanism for issuing a buzzer can quickly recognize the occurrence of a foreign object.

(Third embodiment)
In the first embodiment, when an abnormality occurs due to a scrap, the microswitch is turned on, and the foreign matter occurrence position can be quickly identified by the mechanism for sticking the sticky note paper to the foreign matter detection position.

INDUSTRIAL APPLICABILITY The present invention can be used for a foreign matter detection apparatus in a continuous form printing processing apparatus.

DESCRIPTION OF SYMBOLS 10 Continuous form 20 Conveyance roller 21 Conveyance roller attachment rotating shaft 30 Movable roller 31 Movable roller attachment rotation shaft 40 Arm 41 Arm attachment rotation shaft 50 Position detection device 51 Position detection device installation position 61-64 Spring

Claims (3)

A foreign matter detection device that detects foreign matter adhering to the processed continuous paper surface by a foam processing machine that continuously processes continuous paper,
A fixed rotation shaft provided with an arm made of a rigid movable body, a movable roller provided at one end of the arm, a position variation detection device provided near the other end of the arm, and a paper transport roller The foreign matter that contacts the movable roller via the continuous sheet and has a longer distance between the position variation detection device and the rotation shaft than a distance between the movable roller and the rotation shaft Detection device.   The foreign object detection device according to claim 1, further comprising an alarm device that allows an operator to recognize that a position variation of the movable roller has occurred based on an output signal from the position detection variation detection device. The foreign object detection device according to claim 1, wherein the foreign material occurrence position is recorded on a continuous form based on an output signal from the position detection variation knowledge device.

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