JP2000193430A - Paper cup inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper cup inspection device suitable for a pasted part of the barrel paper of a paper cup whose inspection is difficult after pasting, and suitable for detecting pin holes at the bottom of the paper cup. SOLUTION: A barrel paper pasting device is provided wherein a barrel paper 1 of a paper cup is wound around a core and hot air is blown to at least one pasting side of the barrel paper 1 for adhesion at the pasting side, then pasting sides which are a pair of barrel paper 1 are tightly fitted and pasted together into a cylindrical form. Here, a position measuring means wherein the position of pasted side of the barrel paper 1 is measured for outputting a positional data, and a judging means wherein the condition of pasted state of the barrel paper 1 is judged based on the positional data for generating a judgement data, are provided. Further, a lighting means for projecting light that transmits the paper cup from the outside to inside, an imaging means which images the inside of the paper cup for generating an imaging signal, and a data processing means wherein the condition of the pasted state between the barrel paper 1 and the bottom paper is judged based on the imaging signal for generating a judgement data, are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention belongs to the technical field of manufacturing paper cups. In particular, the present invention relates to a paper cup inspection device for inspecting the quality of a paper cup molded in a molding device.

[0002]

2. Description of the Related Art Of the defects in paper cups, those in which liquid poured into the paper cup leaks are naturally regarded as serious defects. In order to detect this leakage defect, there is known a leak inspection device that injects air at a constant pressure into a sealed paper cup in a cup molding device, detects a pressure change over time after the injection, and inspects for a leakage defect. ing. FIG. 8 shows the main components of this conventional leak inspection apparatus.
FIG. 8 shows both the method A and the method B, but actually, either one of the structures is used. The method A is a method of detecting the air pressure in the inside 85 of the paper cup 84a. Method B is a method for detecting the air pressure at the bottom 86 of the paper cup 84b.

[0003] Compressed air of a constant pressure supplied from an air supply unit 81 of the leak inspection device is supplied to the inside 85 of a paper cup 84a.
Alternatively, it is supplied to the bottom 86 of the paper cup 84b. At this time, if the atmospheric pressure side is reduced using the suction device 87 together, the pressure difference can be increased and the detection sensitivity can be increased. Here, the control valve 82 is operated to change the valve on the air supply unit 81 side from “open” to “closed”, and the valve on the pressure sensor 88 side from “closed” to “open”. Thus, the pressure sensor 88 detects a pressure change over time in the inside 85 or the bottom 86 after the compressed air is injected.

[0004]

FIG. 9 shows an example of this pressure change. FIG. 9A shows a case where the difference in pressure change between a non-defective product and a defective product is remarkable, that is, a case where a hole of a paper cup which causes a leak failure is large. FIG. 9B
Indicates a case where the difference in pressure change between a non-defective product and a defective product is not remarkable, that is, a case where a hole of a paper cup which causes a leakage failure is small. When trying to detect such a small gap, noise is mixed in the response signal of the pressure sensor 88 as shown in FIG. In particular, a small gap in the bonding portion of the paper cup of the paper cup has a low detection sensitivity because it is difficult for a conventional leak detection device to sufficiently secure an outflow path of leaking air, and it is difficult to determine good or bad.

SUMMARY OF THE INVENTION An object of the present invention is to provide a paper cup inspection apparatus which can solve the above-mentioned drawbacks of the conventional leak inspection apparatus or can supplement at least at least. In the paper cup inspection apparatus of the present invention, an inspection suitable for the bonding portion of the body of the paper cup which is difficult after bonding and an inspection suitable for detecting a small hole at the bottom of the paper cup are respectively performed.

[0006]

The above objects are achieved by the present invention described below. That is, the paper cup inspection apparatus according to claim 1 of the present invention winds the paper of the paper cup around a paper bobbin and blows hot air on at least one bonding side of the paper to activate the adhesiveness of the bonding side. Then, in a paperboard bonding apparatus for bonding and bonding the bonding sides to be a set of the paperboard into a bonded cylindrical shape, a position measurement for measuring a position of the bonding side of the paperboard and outputting position data. Means for judging good or bad of the bonding state of the body paper based on the position data and generating good or bad judgment data.

[0007] According to the present invention, in a body paste bonding apparatus,
The position of the bonding side of the body paper is measured by the position measuring means, and the position data is output. The good / bad determining means determines good or bad of the bonding state of the body paper based on the position data, and generates determination data. If the position of the bonding side of the paper cup body is proper, the blowing of hot air in the body bonding device is appropriate, the adhesiveness is activated uniformly over the entire bonding side, and the bonding part is good. . Conversely, if the position of the bonding side of the body of the paper cup is improper, the blowing of hot air in the body bonding device will be inappropriate and the adhesiveness will be activated unevenly depending on the part of the bonding side, and the bonding of the body paper will be performed. The joint is defective. That is, there is a close relationship between the inappropriateness of the position of the bonding side of the paper cup body and the quality of the bonding portion of the paper cup body. Therefore, there is provided a paper cup inspection apparatus which is suitable for a bonding portion of a paper cup body which is difficult to inspect after bonding.

According to a second aspect of the present invention, in the paper cup inspecting apparatus according to the first aspect, the good / bad determining means determines that the position data is within a range of a predetermined lower threshold and a predetermined upper threshold. In some cases, the bonding state of the body paper is determined to be good, and when it is out of the range of the predetermined lower threshold and the predetermined upper threshold, the bonding state of the body paper is determined to be poor. It is. According to the present invention, if the allowable range is set and the position data of the bonding side is within the range between the predetermined lower threshold value and the predetermined upper threshold value, it is determined that the bonding state of the body paper is good.

According to a third aspect of the present invention, in the paper cup inspecting apparatus according to the first or second aspect, the position measuring means has a plurality of position sensors, and the plurality of position sensors are attached to each other. The position is measured at a plurality of points on the side and a plurality of position data is output. According to the present invention, good or bad can be determined based on the positions of a plurality of portions on the bonding side.

According to a fourth aspect of the present invention, in the paper cup inspecting apparatus according to the first or second aspect, the position measuring means has a two-dimensional position sensor for measuring a position on a line. The two-dimensional position sensor measures a position at a point on the line of the bonding side and outputs line profile position data which is position data of the point on the line. According to the present invention, good or bad can be determined based on the line profile position data of the bonding side. In addition, one two-dimensional position sensor
Since only one device is used, installation restrictions and adjustment work are reduced.

According to a fifth aspect of the present invention, there is provided a paper cup inspecting device, comprising: an illuminating means for irradiating light transmitted from the outside to the inside of the paper cup; And a data processing means for judging good or bad of a bonding state between the body paper and the bottom paper based on the signal and generating judgment data.

According to the present invention, the light transmitted from the outside to the inside of the paper cup is irradiated by the illuminating means, the inside of the paper cup is imaged by the imaging means, and an imaging signal is generated. The data processing means based on the imaging signal. Whether the bonding state of the body paper and the bottom paper is good or bad is determined, and the determination data is generated.
If there is a hole in the bottom of the paper cup, a strong light beam that does not attenuate by penetrating the body paper or bottom paper will directly enter the inside of the paper cup, and the image signal inside the paper cup will be the bottom of the paper cup. There is a clear difference from the case where no pore exists. Thus, an inspection device is provided that is adapted to detect small gaps in the bottom of the paper cup.

According to a sixth aspect of the present invention, there is provided a paper cup inspecting apparatus according to the fifth aspect, wherein the paper cup is formed by forming a drinking cup for a paper cup having a body and a bottom formed. A paper cup inspection device, which is a paper cup supplied to the device. ADVANTAGE OF THE INVENTION According to this invention, an in-line inspection can be performed in a drinking-molding apparatus, without newly requiring the conveyance apparatus of the paper cup for an inspection.

According to a seventh aspect of the present invention, in the paper cup inspecting apparatus according to the fifth or sixth aspect, the data processing means includes an A / D conversion step, a binarizing step, a counting step, And a pass / fail judgment step.
In the / D conversion process, the image pickup signal is input and converted into digital data to generate image data, and in the binarization process, the image data is binarized by a predetermined threshold value to distinguish pixels of a light portion and a dark portion. Generating the digitized image data, counting the number of pixels in the bright portion based on the binarized image data in the counting process, and comparing the number of pixels in the bright portion with a predetermined number of pixels in the pass / fail determination process, If the number is within the range of the predetermined number of pixels, it is determined to be good, and if it is out of the range, it is determined to be bad. According to the present invention, the data processing means determines the quality of the paper cup in a series of steps including the A / D conversion process, the binarization process, the counting process, and the quality determination process. As the threshold value for binarization, a threshold value is set which does not erroneously detect light transmission unevenness in the body paper and the bottom paper of the cup and reliably detects light transmitted through the gap.

[0015]

Next, the present invention will be described with reference to embodiments. The paper cup inspection device of the present invention can be incorporated in a paper cup molding device and used inline. By using inline, it is possible to promptly deal with manufacturing conditions and the like when a defect occurs.
Of course, depending on the content of the inspection (inspection of the bottom), it can be used off-line separately from the paper cup molding device. First, an example (many variations exist) of the process of forming a paper cup will be briefly described. A PE (polyethylene) layer is provided on the surface of a paper cup base paper by an EC machine (extrusion coater). Printing is performed on the opposite side of the PE layer by a gravure printing machine. The paper is punched into a fan shape by a punching machine to obtain a paper cup body. The bottom paper of the paper cup is manufactured separately.

With the paper wound halfway around the body winding die, hot air is blown onto the bonding side of the body paper of the paper cup to heat the PE layer in that part. Hot air is blown by a slit-shaped nozzle. In a state where the temperature of the PE on the bonding side is maintained at the temperature required for bonding (the state in which the adhesiveness is activated), the bonding sides of the body paper are pressed and bonded to form a cylindrical shape. Process into The bottom paper is inserted into the cylindrical body, and at the same time, the hot air is blown to the bonding portion between the bottom paper and the body paper to heat the PE layer in that part. Curl the lower body of the paper cup inward. With the adhesion activated, the lower part is crimped. Finally, the body paper at the top (drink) of the paper cup is curled outward.

In the above-described paper cup molding process, a process of blowing hot air to a bonding side of the paper cup body paper and a process of curling the paper body at the top (drink) of the paper cup outward (or a process immediately before the process) In (1), the paper cup inspection device of the present invention is applied. First, a description will be given of a paper cup inspection apparatus applied to a process of blowing hot air onto a bonding side of a paper cup body paper. FIG. 1 shows a state in which hot air is blown to the bonding side of the body paper of the paper cup and an inspection principle. In FIG. 1, 1 is a paper cup body, 2 is one bonding side of the body paper 1, 3 is the other bonding side of the body paper 1, 4 is a body winding type of a body bonding apparatus, and 5 is a body paper. A control device of the bonding device, 6 is a hot air blowing nozzle of the body bonding device, 7 is a reference point of the position sensor, 8 is a reference distance from the reference point 7 to the bonding side 2, and 9 is an allowable range of the reference distance 8. It is.

As shown in FIG. 1, the body paper 1 is wound around a body winding die 4. At this time, the position of the one bonding side 2 of the body paper 1 is usually determined at a predetermined position apart from the body winding die 4 (shown by a solid line). The control device 5 controls to blow out hot air at a predetermined timing. The hot air blowing nozzle 6 is
Hot air is blown against the bonding side 2 of the body paper 1 wound around the sheet. The direction in which the hot air is blown is a direction in which the bonding side 2 is appropriately heated when the position of the bonding side 2 is fixed at a predetermined position. Of course, there is some error in the position where the bonding side 2 is determined, and there is a width at a predetermined position in anticipation of the error.

The hot air blowing nozzle 6 appropriately heats the bonding side 2 when the position of the bonding side 2 is determined within the range of the width. When proper heating is performed, the bonding strength between the bonding side 2 and the bonding side 3 of the body paper 1 is sufficient and an appropriate bonding portion is formed. On the other hand, if the position of the bonding side 2 is determined outside the range of the width, the bonding side 2 cannot be appropriately heated.
If proper heating is not performed, the bonding strength between the bonding side 2 and the bonding side 3 of the body paper 1 is insufficient, and an inappropriate bonding portion is formed.

The allowable range 9 corresponds to the width. The reference distance 8 is a distance from the median of the allowable range 9 to the reference point 7. The reference point 7 is determined according to the installation position of the position sensor of the paper cup inspection device of the present invention. That is, the reference point 7 serves as a reference when the position sensor measures the distance.

FIG. 2 shows an example of the configuration of the paper cup inspection apparatus of the present invention. In FIG. 2, 21 is the body paper, 22 is the body paper 2
1 is one of the bonding sides, 23 is the other bonding side of the body paper 21;
4 is a body-wound type, 25a, 25b, 25c, 25d, 25e
Is a position sensor, 26 is an arithmetic unit, and 27 is a control unit. The position sensors 25a to 25e measure a plurality of positions on the bonding side 23 of the body paper 1 as distances from the reference point 7 (see FIG. 1). The position sensor 25a indicates the position P1 of the drinking mouth, and the position sensor 25b indicates the position P near the center of the drinking mouth.
2, the position sensor 25c measures the position P3 at the center, the position sensor 25d measures the position P4 near the center from the lower part, and the position sensor 25e measures the position P5 at the bottom.

The position sensors 25a to 25e convert the measured distance into an electric signal and output it as, for example, a voltage value.
This voltage value is a voltage value proportional to the distance (displacement amount) from the reference point 7. That is, the position sensors 25a to 25e
Is a position measuring means for measuring the position of the bonding side 22 of the body paper 21 and outputting position data (voltage value). Arithmetic unit 2
Reference numeral 6 inputs the voltage value output from the position sensors 25a to 25e. Then, a comparison is made with the reference voltage value. The reference voltage value has a lower threshold and an upper threshold. Arithmetic unit 26
Determines that the bonding state of the body paper 21 is good when the voltage value is within a range between a predetermined lower threshold and a predetermined upper threshold. If the arithmetic unit 26 is out of the range between the lower threshold and the upper threshold, the arithmetic unit 26 determines that the bonding state of the body paper 21 is defective. That is, the arithmetic unit 26 is a good / bad determination unit.

FIG. 3 is a graph showing the relationship between the voltage values (position data) output from the position sensors 25a to 25e and the pass / fail judgment performed by the arithmetic unit 26. In the graph shown in FIG. 3, the horizontal axis represents the positions P1 to P5 of the bonding side 22 (see FIG. 2). The vertical axis represents the distance (voltage value) from the position sensors 25a to 25e. This graph shows four examples. In case 1 (Case 1), at the position P2 measured by the position sensor 25b and the position P5 measured by the position sensor 25e, the distance from the sensor (distance from the reference point) is outside the range between the lower threshold and the upper threshold. . Therefore, the arithmetic unit 26 determines Case 1 (NG) as defective (NG).

On the other hand, in case 2 (Case 2), the position sensor 2
At positions P1 to P5 measured by 5a to 25e,
The distance from the sensor (the distance from the reference point) is within the range between the lower threshold and the upper threshold. Therefore, the arithmetic unit 2
No. 6 judges that the case 2 (Case 2) is good (OK). Also,
Also in Case 3 (Case 3), at positions P1 to P5 measured by the position sensors 25a to 25e, the distance from the sensor (distance from the reference point) is within the range between the lower threshold and the upper threshold. Therefore, the arithmetic unit 26 uses Case 3 (Case
3) is determined as good (OK).

On the other hand, in case 4 (Case 4), the position sensor 2
At the position P2 measured by 5b and the position P5 measured by the position sensor 25e, the distance from the sensor (distance from the reference point) is outside the range of the lower threshold and the upper threshold. Therefore, the arithmetic unit 26 determines that the case 4 (Case 4) is defective (N
G) is determined. As described above, when the position of the bonding side is measured at a plurality of positions using a plurality of position sensors, the distance from the sensor (the distance from the reference point) is measured at all positions measured by all the position sensors. ) Is within the range between the lower threshold value and the upper threshold value, the arithmetic unit 26 determines to be good.

The control unit 27 inputs the above-mentioned good / bad judgment data from the arithmetic unit 26. Further, the control device 27 inputs an inspection timing signal output by the control device 5 (see FIG. 1) of the body paper bonding device (part of the paper cup forming device). This inspection timing signal is output at a timing before the hot-air blowing nozzle 6 (see FIG. 1) blows out hot air after the bonding side (adhesive portion) of the body paper receiving hot air is at a predetermined position. That is, the output is performed in a state where the winding of the body paper 1 around the body winding die 4 is completed (see FIG. 1). When the control device 27 receives the inspection timing signal, the control device 27
Outputs a defective discharge signal when the defective / bad determination data is "bad" based on the good / bad determination data output by the controller.

FIG. 4 shows another example of the position measuring means in the configuration of the paper cup inspection apparatus of the present invention. In FIG.
41 is a body paper, 42 is one bonding side of the body paper 41, 43 is the other bonding side of the body paper 41, 44 is a body winding type, and 45 is a two-dimensional position sensor. In FIG. 2, 5 is used as the position measuring means.
Although four position sensors 25a to 25e are used, one two-dimensional position sensor 45 is used as position measuring means in FIG. The two-dimensional position sensor 45 can measure the entire position of the bonding side 42 with one piece. The measurement position of the position sensor 25a is a point, and the position in the depth direction is measured at the point. On the other hand, the measurement position of the two-dimensional position sensor 45 is a line, and the position in the depth direction is measured at each point on the line.

For example, the two-dimensional position sensor 45 has a scanning mechanism for scanning a measurement position on a predetermined line. That is, it has a configuration in which the scanning mechanism is provided in the position sensor 25a. The two-dimensional position sensor 45 converts the measured distance into an electric signal and outputs it as, for example, a voltage value. This voltage value is a voltage value proportional to the distance (displacement amount) from the reference point 7 (see FIG. 1). By sampling the voltage value in synchronization with the scanning of the measurement position and converting it into digital data, it is possible to obtain position data at a plurality of locations on the bonding side 42. This position data is line profile position data that is position data on a predetermined line.

Next, a description will be given of a paper cup inspection apparatus which is applied to a process of curling the paper at the top (drink) of the paper cup outward (or a process immediately before) in the process of molding the paper cup. Inspection during this process checks whether the lower portion of the paper cup is properly or improperly molded. FIG. 5 shows a configuration of an image pickup system of a paper cup inspection device provided in a turret portion of a paper cup molding device for supplying a paper cup in a process of curling a body paper at a top portion (drink) of the paper cup outward. In FIG. 5, 51 is a paper cup, 52 is a turret of a paper cup molding device, 53 is a mold of a paper cup molding device, 54 is a transmissive illumination device, 55 area sensor camera, 56 is a light shield, 57 is a control panel, and 58 is a display. Device.

The paper cup 51 is a paper cup in the middle of molding. The bottom paper and the body paper are integrated, and then conveyed by the turret 52 to curl the body paper at the top (drink) of the paper cup outward. The turret 52 is a turret of a drinking mouth molding device, and the drinking mouth of the paper cup 51 is molded while being placed on a mold 53 provided on the turret 52. The mold 53 holds the paper cup 51 so as to fit therein. The mold 53 is fixed to the turret 52. On the extension of the lower part of the paper cup 51, the mold 53
And the turret 52 are open. That is, the lower portion of the paper cup 51 is exposed from the side opposite to the side where the mold 53 of the turret 52 is provided, and there is no obstruction. The top (drink) of the paper cup 51 serving as an insertion opening of the paper cup 51 into the mold 53 is naturally open.

When the paper cup 51 is conveyed by the turret 52 and reaches the imaging position, the transmissive illumination device 54 is provided at a position directly below the opening of the mold 53 and the turret 52. The transmissive illumination device 54 is provided on the frame of the drinking water molding device. In the example shown in FIG. 5, since the distance between the turret 52 and the frame is small,
The transmissive lighting device 54 is a lighting device having a thin panel shape. As such a lighting device, a known panel lighting device used for a backlight of a liquid crystal display device or the like can be used. Also, a large number of light emitting diodes can be arranged in a matrix to form a panel lighting device. As the light emitting diode to be used, for example, a red light emitting light emitting diode is used, and is adapted to the spectral sensitivity characteristic of an imaging unit using a solid-state imaging sensor such as a CCD.
The panel lighting device can be configured to perform highly sensitive detection.

The area sensor camera 55 includes a paper cup 51
Is transported by the turret 52 and reaches a position immediately above an insertion opening (opening) into which the paper cup 51 is inserted into the mold 53 when reaching the imaging position. Light transmitted from the outside to the inside of the paper cup is radiated by the above-mentioned transmissive lighting device 54. The area sensor camera 55 captures an image of the inside of the paper cup 51 with the transmitted light, and generates an imaging signal. The light shield 56 is provided so that light that becomes a disturbance does not enter the imaging region and does not hinder the imaging.

The image pickup signal is inputted by the data processing means of the control panel 57. The data processing means determines whether the bonding state of the body paper and the bottom paper of the paper cup 51 is good or bad based on the input imaging signal and generates determination data. Display device 58
Performs the display of a captured image, the image in the middle of the determination process performed by the data processing means, the determination image, the inspection status, the display of an instruction input screen to the paper cup inspection device performed by the operator, and the like.

In the configuration of the above paper cup inspection apparatus,
Next, the operation of the paper cup inspection device, particularly the operation of the data processing means, will be described. FIG. 6 is a flowchart showing the process of determining the quality of a paper cup in the paper cup inspection apparatus of the present invention.
Shown in First, in step S1, the production of a regular product by the paper cup molding line is started, and the inspection of the paper cup is started almost simultaneously. Next, in step S2, the paper cup 51 is conveyed by the turret 52 and waits for an inspection timing to reach the imaging position. When the paper cup 51 is conveyed by the turret 52 and reaches the imaging position, an inspection start signal is output from the paper cup molding device. When the paper cup inspection device in the standby state inputs the inspection start signal, the process proceeds to step S3.

Next, in step S3, the inside of the paper cup 51 is imaged by the area sensor camera 55, and an image signal is generated. The data processing means of the control panel 57
The imaging signal is input. The imaging signal is converted into digital data by an A / D converter (analog-to-digital converter) of the data processing means, and is stored as image data in the storage device of the data processing means.

Next, in step S4, the data processing means binarizes the image data with a predetermined threshold to generate binarized image data for distinguishing pixels between bright and dark portions. Next, in step S5, the data processing means
The number of pixels in the bright part is counted based on the binarized image data. Next, in step S6, the data processing means
The number of pixels in the bright portion is compared with a predetermined number of pixels. If the number of pixels is within the range of the predetermined number of pixels, it is determined as “good”, and if it is outside the range, it is determined as “defective”. The judgment is “good”
In this case, the process returns to step S2, and the above-described subsequent steps are repeated. If the determination is "bad", step S
Go to 7. Next, in step S7, the data processing means performs processing such as sounding an alarm and outputting a defective discharge signal for discharging the defective paper cup based on the detection of the defective paper cup.

Next, a description will be given of a data processing process of the above-mentioned good / bad judgment based on image data obtained by imaging the paper cup 51. FIG. 7 shows an example of the captured image data and the binarized image data. FIG. 7A shows captured image data, and FIG.
FIG. 7C is a diagram illustrating binarized image data when the paper cup 51 is “good”, and FIG. 7D is a diagram illustrating binarized image data when the paper cup 51 is “bad”. FIG. 7B shows an example of a binarization threshold as a graph. In the captured image data shown in FIG.
Since the illumination is performed from directly below the bottom of the paper cup 51, the bottom is brightly imaged by the transmitted light. The torso is imaged slightly darker than that, and the imaging area around the paper cup 51 is imaged quite dark.

The captured image data is binarized using a binarization threshold shown in the graph of FIG. Paper cup 51
Is "good", binary image data as shown in FIG. 7C is obtained. In the binarized image data in the case of “good”, almost the entire imaging region is a dark part in the binarization, and a light part has a very small area even if it exists.

On the other hand, when the paper cup 51 is "defective", binary image data as shown in FIG. 7D is obtained. The binarized image data in the case of “defective” has a bright portion in the binarization. This bright portion occurs when a hole exists at the bottom of the paper cup 51. If there is a hole in the bottom of the paper cup 51, an intense light beam, which is not attenuated by penetrating the body paper or the bottom paper, directly enters the inside of the paper cup 51. The area of the bright portion caused by the intense light beam has a clear difference between the case where a hole exists at the bottom of the paper cup 51 and the case where no hole exists. Therefore, the quality of the paper cup 51 can be determined by comparing the area of the bright portion (the number of pixels of the bright portion) with a predetermined area (the number of pixels). Since the light rays that enter directly are intense, the detection of small pores at the bottom of the paper cup can be performed.

[0040]

As described above, according to the paper cup inspecting apparatus according to the first aspect of the present invention, there is provided a paper cup inspecting apparatus adapted to a bonding portion of a body of a paper cup which is difficult to inspect after bonding. You. According to the paper cup inspection apparatus of the second aspect of the present invention, when the allowable range is set and the position data of the bonding side is within the range of the predetermined lower threshold and the predetermined upper threshold, the bonding of the body paper is performed. It is determined that the state is good. Further, according to the paper cup inspection device according to the third aspect of the present invention, it is possible to determine good or bad based on the positions of a plurality of places on the bonding side. Further, according to the paper cup inspection apparatus according to claim 4 of the present invention, it is possible to determine good or bad based on the line profile position data of the bonding side. Also, since only one two-dimensional position sensor is used, installation restrictions and adjustment labor are reduced.

Further, according to the paper cup inspection apparatus of the fifth aspect of the present invention, there is provided an inspection apparatus adapted to detect a small gap at the bottom of the paper cup. Further, according to the paper cup inspection apparatus of the sixth aspect of the present invention, an in-line inspection can be performed in the drinking water molding apparatus without newly requiring a paper cup transport apparatus for inspection. According to the paper cup inspection apparatus of the present invention, the data processing means performs the paper cup in a series of steps including an A / D conversion step, a binarization step, a counting step, and a pass / fail judgment step. Is determined.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state in which hot air is blown to a bonding side of a body paper of a paper cup and an inspection principle.

FIG. 2 is a diagram showing an example of a configuration of a paper cup inspection device of the present invention.

FIG. 3 is a graph showing a relationship between a voltage value (position data) output from a position sensor and a good / bad judgment performed by an arithmetic unit.

FIG. 4 is a diagram showing another example of the position measuring means in the configuration of the paper cup inspection device of the present invention.

FIG. 5 is a diagram illustrating a configuration of an imaging system of a paper cup inspection device provided in a turret portion of the paper cup molding device.

FIG. 6 is a flowchart showing a process of determining the quality of a paper cup in the paper cup inspection device of the present invention.

FIG. 7 is a diagram illustrating an example of captured image data and binarized image data.

FIG. 8 is a diagram showing main components of a conventional leak inspection device.

FIG. 9 is a diagram showing an example of a pressure change detected by a conventional leak inspection device.

[Explanation of symbols]

 1,21,41,51 Paper cup body 2,22,42 One bonding side 3,23,43 The other bonding side 4,24,44 Body winding type of body bonding apparatus 5 Body bonding apparatus Control device 6 hot air blowing nozzle of body bonding device 7 reference point of position sensor 8 reference distance 9 allowable range of reference distance 25a, 25b, 25c, 25d, 25e position sensor 26 arithmetic unit 27 control unit 45 two-dimensional position sensor 52 Turret of Drinking Molding Device 53 Mold of Drinking Molding Device 54 Transmissive Illumination Device 55 Area Sensor Camera 56 Light Shield 57 Control Panel 58 Display Device

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Zenei Takagi 1-1-1 Ichigaya-Kaga-cho, Shinjuku-ku, Tokyo F-term in Dai Nippon Printing Co., Ltd. (reference) 2F065 AA03 AA49 AA54 AA65 BB05 CC00 FF01 FF04 FF61 GG15 HH02 JJ03 JJ26 QQ01 QQ05 QQ06 QQ21 QQ23 QQ32 SS09 SS13

Claims (7)

[Claims] 1. A method of wrapping a body of a paper cup in a body winding form and blowing hot air on at least one bonding side of the body to activate the adhesiveness of the bonding side, and then forming a body of the body paper. In a paperboard laminating apparatus for bonding and bonding together sides to form a bonded tubular shape, a position measuring means for measuring the position of the bonded side of the paperboard and outputting position data, and based on the position data, A paper cup inspection device, comprising: a good / bad determining unit configured to determine good / bad of a bonding state of a body paper and generate determination data. 2. The paper cup inspection device according to claim 1, wherein said pass / fail determination means determines the bonding state of said body paper when said position data is within a range between a predetermined lower threshold and a predetermined upper threshold. A paper cup inspection device, wherein the paper cup inspection device is determined to be good, and determines that the bonding state of the body paper is defective when the predetermined value is out of the range between the predetermined lower threshold value and the predetermined upper threshold value. 3. The paper cup inspection device according to claim 1, wherein the position measuring means has a plurality of position sensors, and the plurality of position sensors measure positions at a plurality of positions on the bonding side. A paper cup inspection device for outputting a plurality of position data. 4. The paper cup inspection apparatus according to claim 1, wherein said position measuring means has a two-dimensional position sensor for measuring a position on a line, and said two-dimensional position sensor is located on a line of said bonding side. Characterized in that the position is measured at the point (1) and line profile position data which is position data of the point on the line is output. 5. An illuminating unit for irradiating light transmitted from the outside to the inside of the paper cup, an imaging unit for imaging the inside of the paper cup to generate an image signal, and attaching a body paper and a bottom paper based on the image signal. And a data processing means for determining whether the combined state is good or bad and generating the determination data. 6. A paper cup inspecting apparatus according to claim 5, wherein said paper cup is a paper cup supplied to a drinking water molding apparatus for molding a drinking port for a paper cup having a molded body and a bottom. And a paper cup inspection device. 7. A paper cup inspection apparatus according to claim 5, wherein said data processing means includes an A / D conversion step;
A binarizing step, a counting step, and a pass / fail determination step. In the A / D converting step, the imaging signal is input and converted into digital data to generate image data. Binarizing the image data with a predetermined threshold to generate binarized image data for distinguishing pixels in a bright portion and a dark portion; and in the counting step, the number of pixels in a bright portion is determined based on the binarized image data. In the pass / fail determination step, the number of pixels in the bright portion is compared with a predetermined number of pixels, and if the number is within the range of the predetermined number of pixels, it is determined to be good. A paper cup inspection device, which is determined to be defective.