JP2021195129A - Flap inspection device and flap inspection method - Google Patents

Abstract

To provide a flap inspection device and a flap inspection method capable of detecting a flap abnormality with higher accuracy.SOLUTION: A flap inspection device according to one embodiment is the flap inspection device for inspecting a first flap B1 and a second flap B2 of a packing body B provided with the first flap B1 and the second flap B2 covering an opening. The flap inspection device includes a sensor that detects a step between the surface of the first flap B1 and the surface of the second flap B2, and a control section that determines that the first flap B1 and the second flap B2 are abnormal when the value of the step detected by the sensor is equal to or higher than a threshold value.SELECTED DRAWING: Figure 6

Description

The present disclosure relates to a flap inspection device and a flap inspection method.

Conventionally, various flap inspection devices for inspecting flap abnormalities in corrugated cardboard boxes and the like have been known. Japanese Unexamined Patent Publication No. 2011-240978 describes a flap folding defect detecting device. The flap folding defect detection device includes a control unit, a flap detection sensor, and a determination result output device. The flap detection sensor is a distance sensor using visible light. The flap detection sensor irradiates the front surface of the transported carton with visible light, receives the reflected light from the front surface, and measures the distance to the carton. When the distance measured by the flap detection sensor deviates from a predetermined threshold value, the determination result output device determines that a flap fold defect has occurred and outputs the determination result.

Japanese Unexamined Patent Publication No. 2011-240978

By the way, as described above, when an abnormality such as a flap fold is detected by using a distance sensor, there is room for improvement in the accuracy of detecting the flap abnormality. When the front surface of the carton is irradiated with visible light to measure the distance to the carton, for example, the carton transported diagonally to the transport line may be determined to be abnormal. That is, even though the flap condition is normal, a carton transported diagonally may be determined to be abnormal. Therefore, there is a concern that a carton with a normal flap condition may be erroneously determined to be abnormal. Further, when the above-mentioned distance sensor is used to determine the abnormality of the flap, there is a possibility that the abnormality or the like in which paper scraps are caught between the flaps cannot be detected. Therefore, it is required to detect flap abnormalities with higher accuracy.

It is an object of the present disclosure to provide a flap inspection device and a flap inspection method capable of detecting flap abnormalities with higher accuracy.

The flap inspection device according to the present disclosure is a flap inspection device for inspecting the first flap and the second flap of a package having the first flap and the second flap covering the opening, and is a flap inspection device for inspecting the surface of the first flap and the second flap. A sensor that detects a step between the flap surface and an abnormality determination unit that determines that the first flap and the second flap are abnormal when the value of the step detected by the sensor is equal to or greater than the threshold value. Be prepared.

In this flap inspection device, a sensor detects a step between the surface of the first flap and the surface of the second flap. Then, when the value of the step detected by the sensor is equal to or greater than the threshold value, the abnormality determination unit determines that the first flap and the second flap are abnormal. Therefore, the step formed between the surface of the first flap and the surface of the second flap is detected by the sensor, and the abnormality determination of the first flap and the second flap is performed according to the value of the step. That is, since the abnormality determination is performed from the step between the first flap and the second flap, the abnormality determination is made from the positional relationship between the position of the first flap and the position of the second flap. Therefore, by performing the abnormality determination from the positional relationship between the first flap and the second flap, it is possible to prevent the slanted package from which the flap is in a normal state from being determined as an abnormality. Therefore, the abnormality determination of the first flap and the second flap can be performed with high accuracy. Further, by performing the abnormality determination from the positional relationship between the first flap and the second flap, it is possible to detect the debris sandwiched between the first flap and the second flap. Therefore, the flap abnormality can be determined with higher accuracy.

The sensor may be an integrated step detection sensor. In this case, since one step detection sensor may be arranged, the sensor configuration can be simplified. Further, as compared with the case where a plurality of sensors are provided, the step can be measured by one step detection sensor without comparing the measurement results of the plurality of sensors, so that the measurement accuracy can be improved.

The sensor may irradiate the first flap and the second flap of the transported package with a laser beam to detect a step. In this case, since the laser beam having high directivity can be applied to the first flap and the second flap to measure the step, more accurate measurement of the step becomes possible.

The sensor irradiates a linear laser beam straddling the first flap and the second flap, and is between the first set point on the laser beam in the first flap and the second set point on the laser beam in the second flap. A step located at may be detected. In this case, since the step located between the first set point and the second set point on the linear laser beam can be measured, the step can be measured easily and with high accuracy.

The position of the first set point on the laser beam and the position of the second set point on the laser beam may be variable. In this case, since the two positions for measuring the step are variable, it is possible to measure the step at an arbitrary position on the laser beam. Therefore, the step can be measured with higher accuracy.

The sensor may continuously detect the step for a certain period of time, and the abnormality determination unit may determine that the step is abnormal when the detected step continues for a certain period of time and is equal to or higher than the threshold value. In this case, the case where the step between the first flap and the second flap occurs temporarily for less than a certain period of time can be excluded from the case where it is determined to be abnormal, so that the possibility of erroneous determination can be further reduced. can.

The above-mentioned fixed time may be 6 ms or more and 150 ms or less. In this case, the possibility of erroneous determination can be further reduced by continuously measuring the step for 6 ms or more. Further, by continuously measuring the step for 150 ms or less, the step to be detected can be detected and the accuracy of abnormality determination can be further improved.

The flap detection method according to the present disclosure is a flap inspection method for inspecting the first flap and the second flap of a package including the first flap and the second flap covering the opening, and is a flap inspection method for the surface of the first flap and the second flap. It includes a step of detecting a step between the flap surface and the surface of the flap, and a step of determining an abnormality of the first flap and the second flap from the value of the step detected in the detecting step.

In this flap inspection method, a step between the surface of the first flap and the surface of the second flap is detected, and it is determined from the value of the detected step whether or not the first flap and the second flap are abnormal. .. Therefore, as in the flap determination device described above, the abnormality determination is performed from the step between the surface of the first flap and the surface of the second flap, so that the determination is performed according to the positional relationship between the first flap and the second flap. Can be done. Therefore, it is possible to prevent the slanted package from which the flap is in a normal state from being judged as abnormal, and to detect the debris sandwiched between the first flap and the second flap. It can be carried out. From the above, it is possible to determine the flap abnormality with higher accuracy.

According to the present disclosure, flap abnormalities can be detected with higher accuracy.

It is a figure which shows typically the example of the structure of the flap inspection apparatus which concerns on embodiment. It is a side view which shows the laser beam irradiated from the sensor of the flap inspection apparatus of FIG. 1 and the 1st flap and the 2nd flap of a package body. It is a side view of the packing body which shows the example of the state which the 1st flap and the 2nd flap are abnormal. FIG. 3 is a perspective view of a package showing another example of a state in which the first flap and the second flap are abnormal. It is a side view of the package body which shows typically the example of the irradiation of the laser beam which concerns on the comparative example. 2 is a side view of a package showing the laser beam of FIG. 2 and the first flap and the second flap. It is a flowchart which shows the example of the process of the flap inspection method which concerns on embodiment. It is a perspective view which shows the example of the packing body which was carried diagonally.

Hereinafter, embodiments of the flap inspection device and the flap inspection method according to the present disclosure will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are designated by the same reference numerals, and duplicate description will be omitted as appropriate. In addition, the drawings may be partially simplified or exaggerated for the sake of easy understanding, and the dimensional ratios and the like are not limited to those described in the drawings.

In the present disclosure, the "flap" refers to a portion that serves as a lid that covers the opening of the package. "Flap" includes an outer flap and an inner flap. However, in the following embodiment, an example in which the outer flap is to be inspected will be described. "Packing body" indicates a box for packing an object to be packed.

The "packaging body" may be, for example, a cardboard box or a paper box other than the cardboard box. "Packing object" indicates an object to be packed in a packing body. Examples of the “object to be packed” include cans such as beverage cans, PET bottles, and beverage containers including bottles. In the following embodiment, an example in which the packing object is a beverage can C (see FIG. 3) will be described.

FIG. 1 is a diagram showing each device of an exemplary flap inspection device 1. FIG. 2 is a side view showing an example of a state in which the sensor 10 of the flap inspection device 1 inspects the package B. As shown in FIGS. 1 and 2, the flap inspection device 1 is, for example, a caser 2 for packing an object to be packed in a packing body and a sensor 10 for inspecting the first flap B1 and the second flap B2 of the packing body B. A control unit 5 (abnormality determination unit) that controls each unit of the flap inspection device 1 and an exclusion machine 4 that excludes the package B determined to be abnormal by the sensor 10 are provided. The flap inspection device 1 may further include a monitor 3 for monitoring the inspection status of the sensor 10.

For example, the first flap B1 and the second flap B2 are short flaps (outer flaps) of the package B. As an example, the first flap B1 is a short flap located on the vertically upper side, and the second flap B2 is a short flap located on the vertically lower side. “Abnormality” of the package B means, for example, inward bending of the first flap B1 or the second flap B2, peeling of the first flap B1 or the second flap B2, and between the first flap B1 and the second flap B2. The state where the scraps are caught in the shavings, etc. can be mentioned.

For example, the caser 2 is a device for taking out a packing body B such as corrugated cardboard, accommodating a plurality of packing objects in the packing body B, and packing the packing objects by molding the packing body B. The caser 2 is provided with, for example, a transport line for transporting the taken-out package B and the package target, and forms the package B while transporting the package B and the package target along the transport line. The caser 2 and the sensor 10 are connected to each other by the transport path R1, and the package B in which the beverage can C is housed by the caser 2 is transported to the sensor 10 via the transport path R1. The sensor 10 may be arranged near the exit of the caser 2.

The sensor 10 inspects, for example, the state of the first flap B1 and the second flap B2 of the package B transported along the transport path R1. The sensor 10 irradiates the surfaces of the first flap B1 and the second flap B2 with the laser beam L, and measures the step between the surface of the first flap B1 and the surface of the second flap B2. It is a measurement sensor. Then, the control unit 5 determines whether or not the first flap B1 and the second flap B2 are abnormal. The details of the abnormality determination will be described later.

The package B determined to be normal by the control unit 5 is transported along the transport path R2 extending from the sensor 10. The package B determined to be abnormal by the control unit 5 is excluded from the transport path R2 by the exclusion machine 4. As a result, the packing body B determined to be abnormal can be separated from the normal packing body B.

The control unit 5 may be, for example, a component capable of controlling the sensor 10, and the monitor 3 may display the inspection status of the sensor 10. The monitor 3 may display the irradiation state of the laser beam L by the sensor 10, for example, as shown in FIG. Further, the operator or the like may be able to control the irradiation of the laser beam L by the sensor 10 through the control unit 5.

As an example, the surface B11 of the package B to which the laser beam L is irradiated has a rectangular shape extending in the longitudinal direction D1 and the lateral direction D2. For example, the package B is conveyed along the longitudinal direction D1. The lateral direction D2 may be the vertical direction. The first flap B1 constitutes one side (for example, the upper side) of the surface B11 in the lateral direction D2, and the second flap B2 constitutes the other side (for example, the lower side) of the surface B11 in the lateral direction D2.

The exemplary first flap B1 is a first line portion B12 located on the center side of the longitudinal direction D1 of the package B, and one end side of the first line portion B12 from the end side of the longitudinal direction D1 to the one end side of the lateral direction D2. It is provided with a first inclined portion B13 that is inclined to. The exemplary second flap B2 includes a second wire portion B22 located on the center side of the longitudinal direction D1 of the package B, and the other end of the second wire portion B22 from the end side of the longitudinal direction D1 to the other end of the lateral direction D2. A second inclined portion B23 that inclines to the side is provided. The first line portion B12, the first inclined portion B13, the second line portion B22, and the second inclined portion B23 may be linear or curved.

A gap S is formed between the first line portion B12 and the second line portion B22, and between the first inclined portion B13 and the second inclined portion B23, and the gap S is the first line portion B12 and the second line portion. It is widely formed from the portion B22 toward the end side in the longitudinal direction D1. For example, a part of the inner flap B3 may be exposed from the gap S. However, the shapes of the first flap B1 and the second flap B2 are not limited to the above-mentioned examples, and can be appropriately changed.

The sensor 10 irradiates, for example, a laser beam L straddling the first flap B1 and the second flap B2. The laser beam L has, for example, a linear shape extending in a direction intersecting the longitudinal direction D1, and extends linearly in the lateral direction D2 as an example. The sensor 10 measures a step located between the position of the first setting point L1 and the position of the second setting point L2 on the laser beam L. The sampling period when the sensor 10 measures the step is, for example, 1 ms or more and 300 ms or less. However, the sampling period may be 2 ms or more, 5 ms or more, 6 ms or more, 8 ms or more, 10 ms or more, 11 ms or more, 15 ms or more, 20 ms or more, 30 ms or more, 50 ms or more, 100 ms or more, or 120 ms or more. Further, the sampling period may be 250 ms or less, 225 ms or less, 200 ms or less, 175 ms or less, or 150 ms or less. The sampling period is not limited to the above value and can be changed as appropriate.

For example, the sensor 10 measures the difference between the height of the surface of the first flap B1 at the first setting point L1 and the height of the surface of the second flap B2 at the second setting point L2 as a step. The "height" is the irradiation direction of the laser beam L from the sensor 10 that irradiates the laser beam L to each of the first setting point L1 and the second setting point L2 (for example, the longitudinal direction D1 and the lateral direction D2). The distance in the direction orthogonal to both of the above, or the direction orthogonal to the paper surface of FIG. 2) is shown.

As an example, the sensor 10 may include a sensor head that irradiates the laser beam L and measures the above-mentioned step as an electric signal, and a sensor amplifier that amplifies the electric signal of the sensor head. For example, the sensor 10 may be connected to the control unit 5 which is a control panel via a cable, and the control unit 5 may receive the step measured by the sensor 10 as an electric signal and make a determination. However, the hardware configuration and functional configuration of the sensor 10 and the control unit 5 are not limited to the above examples, and can be appropriately changed.

The control unit 5 determines the abnormality of the first flap B1 and the second flap B2 from the step between the first setting point L1 and the second setting point L2 measured by the sensor 10. For example, the control unit 5 determines that the step is abnormal when the step measured by the sensor 10 is equal to or greater than the threshold value, and determines that the step is normal when the step measured by the sensor 10 is not equal to or greater than the threshold value. The threshold value is, for example, 1 mm or more, 2 mm or more, 3 mm or more, 5 mm or more, 7 mm or more, or 10 mm or more. The upper limit of the threshold value is, for example, 20 mm or less. As an example, the threshold value is 10 mm. However, the value of the threshold value is not limited to 10 mm and can be changed as appropriate. Further, the threshold value may be made variable via the control unit 5. As an example, the threshold can be changed in increments of 500 μm (0.5 mm).

For example, the respective positions (distance between the first setting point L1 and the second setting point L2) of the first setting point L1 and the second setting point L2 in the laser beam L can be changed by the control unit 5. As an example, the distance between the first set point L1 and the second set point L2 is variable within a range of 100 mm or more and 200 mm or less. The distance between the first setting point L1 and the second setting point L2 may be 110 mm or more, 120 mm or more, 130 mm or more, 140 mm or more, or 150 mm or more. Further, the distance between the first setting point L1 and the second setting point L2 may be 190 mm or less, 180 mm or less, 170 mm or less, 160 mm or less, or 150 mm or less. However, the value of the distance between the first setting point L1 and the second setting point L2 is not limited to each of the above examples, and can be changed as appropriate. also. The distance between the first set point L1 and the second set point L2 does not have to be variable.

In the present embodiment, the first set point L1 is set at the position of the first flap B1, and the second set point L2 is set at the position of the second flap B2. Further, as shown in FIG. 3, when the object to be packed is the beverage can C, the second setting point L2 is set at the position (height) of the can body C1 of the beverage can C, and the first setting point. L1 may be set at the position (height) of the neck portion C2 of the beverage can C. The "neck portion" refers to a portion recessed from the can body of a beverage can.

In this case, as illustrated in FIG. 3, since the sensor 10 detects the step located between the can body C1 and the neck portion C2, each of the first flap B1 and the second flap B2 is the beverage can C. Abnormalities that are bent inward on each of the top and bottom can also be detected. As the beverage can C, a 350 ml (milliliter) beverage can C is shown as an example in FIG. 3, but a 500 ml beverage can may be used, and the size of the beverage can is not particularly limited.

As described above, by measuring the step located between the first setting point L1 and the second setting point L2 in the laser beam L, for example, as shown in FIG. 4, an abnormality in which the scrap B4 is sandwiched. Can be detected. In the example of FIG. 4, the debris B4 sandwiched between the first flap B1 and the second flap B2 extends toward the first flap B1, and the step where the first setting point L1 is higher than the second setting point L2. Is measured by the sensor 10, and the control unit 5 determines that it is abnormal. As in the example of the scrap B4, in the present embodiment, it is possible to detect an abnormality in which a foreign substance is caught between the first flap B1 and the second flap B2.

By the way, for example, when the step between the first setting point L1 and the second setting point L2 is measured pinpointly, as shown in FIG. 5, the end side B51 inclined in both the longitudinal direction D1 and the lateral direction D2 is provided. There is a concern that the flap B5 to be held may be erroneously determined as abnormal. Therefore, in the present embodiment, as shown in FIG. 6, the measurement of the T step is continuously performed for a certain period of time. This makes it possible to prevent the case where a step appears temporarily as shown in FIG. 5 from being erroneously determined as an abnormality.

As described above, the package B is conveyed along the longitudinal direction D1. Therefore, when the surface B11 of the package B is irradiated with the laser beam L for a certain period of time, the presence or absence of a step is measured in a certain section extending in the longitudinal direction D1 as shown in FIG. The value of T for a certain period of time is made variable, for example, via the control unit 5.

As an example, after one end of the longitudinal direction D1 of the package B reaches the front of the sensor 10, the package B is conveyed in the longitudinal direction D1, and the other end of the longitudinal direction D1 of the package B reaches the front of the sensor 10. The time to complete is 300 ms. On the other hand, assuming that T is set to 6 ms for a certain period of time as an example, the laser beam L is irradiated on 1/15 of the entire longitudinal direction D1 of the package B.

In this case, the control unit 5 determines that the step is abnormal when the step is continuously measured by the sensor 10 in the section corresponding to T for a certain period of time. On the other hand, even if the step is measured by the sensor 10 only in a part of the section corresponding to T for a certain period of time, the control unit 5 does not determine that it is abnormal. Therefore, if the value of T for a certain period of time is too large, even if an abnormality to be detected occurs, the abnormality may not be detected. Therefore, it is preferable that the value of T for a certain period of time is appropriately determined according to the speed at which the package B is conveyed and the like. For example, if T is 6 ms or more and 100 ms or less (or 150 ms or less (or less than 150 ms)) for a certain period of time, it is possible to avoid erroneously determining the state of FIG. 5 as an abnormality, and the abnormality to be detected is surely regarded as an abnormality. It can be determined. The fixed time T may be 10 ms or more, 15 ms or more, 20 ms or more, 30 ms or more, or 50 ms or more. Further, the fixed time T may be 120 ms or less, 90 ms or less, 80 ms or less, 70 ms or less, 60 ms or less, or 50 ms or less. In this way, the value of T for a certain period of time can be changed as appropriate.

Next, an example of the process of the flap inspection method according to the present embodiment will be described with reference to the flowchart of FIG. In the flowchart of FIG. 7, the object to be packed is packed in the packing body B by the caser 2 of the flap inspection device 1, and the sensor 10 and the control unit 5 determine the status of the first flap B1 and the second flap B2 of the packing body B. An example is shown.

First, the object to be packed such as the beverage can C is transported (step S1), and then the caser 2 packs the object to be packed. As an example, the caser 2 takes out the corrugated cardboard and transports the taken out corrugated cardboard to the transport line. Then, the corrugated cardboard is bent to form a box-shaped packing body B, and a plurality of beverage cans C are pushed into the packing body B to accommodate the beverage cans C in the packing body B.

After that, the can detection sensor may inspect whether or not the beverage can C is present in the package B. Then, the caser 2 applies an adhesive to the outer surface of the inner flap B3 of the packing body B, bends the first flap B1 and the second flap B2 inside the packing body B, and bends the first flap B1 to the outer surface of the inner flap B3. And the second flap B2 may be adhered.

After the packing of the object to be packed into the packing body B is completed as described above, the flap inspection of the packing body B is performed (step S3, step of detecting a step). Prior to step S3, the position of the first set point L1 of the laser beam L irradiated by the sensor 10, the position of the second set point L2 (distance between the first set point L1 and the second set point L2), and so on. A fixed time T, which is the time for measuring the step, and a threshold value for the step for determining an abnormality may be set.

As illustrated in FIG. 6, the sensor 10 irradiates the package B conveyed along the longitudinal direction D1 with the linear laser beam L extending along the lateral direction D2, and sets the first setting. The step located between the point L1 and the second set point L2 is measured. The step is measured continuously for a set fixed period of time. Then, the control unit 5 determines whether or not there is an abnormality in the flap (step of determining the abnormality, step S4).

When the value of the step measured by the sensor 10 is equal to or higher than a preset threshold value (YES in step S4), the control unit 5 excludes the package B having the step from the transport path R2 by the exclusion machine 4 (step). S5). On the other hand, when the value of the step measured by the sensor 10 is not equal to or higher than the threshold value (NO in step S4), the control unit 5 transports the package B having the step along the transport path R2.

Further, the control unit 5 may reject the package B when the value of the measured step is T continuously for a certain period of time and is equal to or higher than the threshold value in step S4. Then, when the measured step value is continuously less than T for a certain period of time and is continuously equal to or more than the threshold value, the control unit 5 may convey the package B along the transfer path R2. After the above determination of the presence or absence of abnormality, a series of steps is completed.

Next, the action and effect obtained from the flap inspection device 1 and the flap inspection method according to the present embodiment will be described. In the flap inspection device 1 and the flap inspection method according to the present embodiment, the sensor 10 detects a step between the surface of the first flap B1 and the surface of the second flap B2. Then, when the value of the step detected by the sensor 10 is equal to or greater than the threshold value, the control unit 5 determines that the first flap B1 and the second flap B2 are abnormal.

Therefore, the sensor 10 detects the step formed between the surface of the first flap B1 and the surface of the second flap B2, and the abnormality determination of the first flap B1 and the second flap B2 is made according to the value of the step. Will be done. That is, since the abnormality determination is performed from the step between the first flap B1 and the second flap B2, the abnormality determination is made from the positional relationship between the position of the first flap B1 and the position of the second flap B2.

Therefore, by performing an abnormality determination from the positional relationship between the first flap B1 and the second flap B2, as shown in FIG. 8, the first flap B1 and the packing body B transported diagonally with respect to the transport path R1 If the state of the second flap B2 is normal, it can be prevented from being determined as abnormal.

FIG. 8 shows an example of the package B that is transported diagonally with respect to the transport path R1, and the value of the deviation Z with respect to the transport path R1 is 30 mm as an example. Since it is possible to determine that the normal package B that is obliquely transported in this way is not abnormal, it is possible to suppress erroneous determination. Therefore, the abnormality determination of the first flap B1 and the second flap B2 can be performed with high accuracy.

Further, by performing an abnormality determination from the positional relationship between the first flap B1 and the second flap B2, as shown in FIG. 4, the scrap B4 sandwiched between the first flap B1 and the second flap B2 Detection can be performed. Therefore, the abnormality of the first flap B1 and the second flap B2 can be determined with higher accuracy.

As described above, the sensor 10 may be an integrated step detection sensor. In this case, since one step detection sensor may be arranged, the sensor configuration can be simplified. Further, as compared with the case where a plurality of sensors are provided, the step can be measured by one step measuring sensor without comparing the measurement results of the plurality of sensors, so that the measurement accuracy can be improved.

The sensor 10 may irradiate the first flap B1 and the second flap B2 of the package B being conveyed with the laser beam L to detect a step. In this case, since the laser beam L having high directivity can be applied to the first flap B1 and the second flap B2 to measure the step, more accurate measurement of the step becomes possible.

The sensor 10 irradiates a linear laser beam L straddling the first flap B1 and the second flap B2, and the first set point L1 on the laser beam L in the first flap B1 and the laser beam L in the second flap B2. A step located between the above second setting point L2 may be detected. In this case, since the step located between the first set point L1 and the second set point L2 on the linear laser beam L can be measured, the step can be measured easily and with high accuracy.

The position of the first setting point L1 on the laser beam L and the position of the second setting point L2 on the laser beam L may be variable. In this case, since the two reference positions for forming the step are variable, it is possible to measure the step at an arbitrary position on the laser beam L. Therefore, the step can be measured with higher accuracy.

As shown in FIG. 6, the sensor 10 continuously detects the step for a certain period of time, and the control unit 5 determines that the detected step is abnormal when the detected step continues for a certain period of time and is equal to or higher than the threshold value. You may. In this case, the case where the step between the first flap B1 and the second flap B2 is less than T for a certain period of time and temporarily occurs can be excluded from the case where it is determined to be abnormal, so that the possibility of erroneous determination is further reduced. Can be made to.

The fixed time T may be 6 ms or more and 150 ms or less. In this case, the possibility of erroneous determination can be further reduced by continuously measuring the step for 6 ms or more. Further, by continuously measuring the step for 150 ms or less, the step to be detected can be detected and the accuracy of abnormality determination can be further improved.

The embodiment of the flap inspection device and the flap inspection method according to the present disclosure has been described above. However, the present disclosure is not limited to the above-described embodiment, and may be modified or applied to other things without changing the gist described in each claim. That is, the configuration and function of each part of the flap inspection device, and the number, contents, and order of the steps of the flap inspection method can be appropriately changed without departing from the above gist.

For example, in the above-described embodiment, an example in which the sensor 10 is provided in the transport path R1 near the outlet of the caser 2 has been described. However, the place where the sensor 10 is provided is not limited to the above example and can be changed as appropriate. Further, the transport path of the package B is not limited to the above-mentioned transport path R1 and transport path R2. The transport path of the package B may be, for example, a curved transport path or a path that joins or separates from another path in the middle, and the type of the transport path can be changed as appropriate.

In the above-described embodiment, the beverage can C is exemplified as a packing object. However, the object to be packed may be something other than the beverage can C, and the type of the object to be packed can be changed as appropriate. Further, in the above-described embodiment, an example in which the packing body B is a cardboard box has been described. However, the package may be something other than corrugated cardboard, and the type and material of the package can be changed as appropriate.

1 ... Flap inspection device, 2 ... Caser, 3 ... Monitor, 4 ... Exclusion machine, 5 ... Control unit (abnormality determination unit), 10 ... Sensor, B ... Package, B1 ... 1st flap, B2 ... 2nd flap, B3 ... Inner flap, B4 ... Scrap, B5 ... Flap, B11 ... Surface, B12 ... First line part, B13 ... First inclined part, B22 ... Second line part, B23 ... Second inclined part, B51 ... Edge , C ... Beverage can (packaging object), C1 ... Can body, C2 ... Neck, D1 ... Longitudinal direction, D2 ... Short direction, L ... Laser light, L1 ... First setting point, L2 ... Second setting point , R1, R2 ... Transport path, S ... Gap, T ... Constant time.

Claims (8)

A flap inspection device for inspecting the first flap and the second flap of a package having a first flap and a second flap covering an opening.
A sensor that detects a step between the surface of the first flap and the surface of the second flap, and
An abnormality determination unit that determines that the first flap and the second flap are abnormal when the value of the step detected by the sensor is equal to or higher than the threshold value.
Flap inspection device equipped with. The sensor is an integrated step detection sensor.
The flap inspection device according to claim 1. The sensor irradiates the first flap and the second flap of the package being conveyed with a laser beam to detect the step.
The flap inspection device according to claim 1 or 2. The sensor irradiates the linear laser beam straddling the first flap and the second flap, and the first set point on the laser beam in the first flap and the laser beam on the second flap. Detects the step located between the second set point and
The flap inspection device according to claim 3. The position of the first set point on the laser beam and the position of the second set point on the laser beam are variable.
The flap inspection apparatus according to claim 4. The sensor continuously detects the step for a certain period of time.
The abnormality determination unit determines that the abnormality is abnormal when the detected step is continuously equal to or greater than the threshold value for a certain period of time.
The flap inspection device according to any one of claims 1 to 5. The fixed time is 6 ms or more and 150 ms or less.
The flap inspection apparatus according to claim 6. A flap inspection method for inspecting the first flap and the second flap of a package having a first flap and a second flap covering an opening.
A step of detecting a step between the surface of the first flap and the surface of the second flap, and
A step of determining an abnormality of the first flap and the second flap from the value of the step detected in the detection step, and a step of determining the abnormality.
Flap inspection method equipped with.

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