JP5443729B2 - Boxing sheet material joint part inspection apparatus and method, and boxing sheet material folding accuracy inspection apparatus and method - Google Patents

Description

  INDUSTRIAL APPLICABILITY The present invention uses a joint inspection apparatus and method for a box making sheet material suitable for use in inspecting the folding accuracy of a box making sheet material (for example, a cardboard sheet for box making), and this apparatus or method. The present invention relates to a folding accuracy inspection device and an inspection method for a box-making sheet material.

In a box making machine, a cardboard sheet for folding is manufactured by folding the cardboard sheet and gluing both ends aligned with each other. The box making corrugated sheet is packed in a folded state in a plate shape, and then assembled into a cardboard box manually or by a machine and used for packing products and the like.
Such shaped corrugated board box cardboard sheet, may result if not folded to the size of the provisions street, not in a cardboard box of standard shape, also, in the case of using the assembly machine such as a cardboard box, the machine trouble There is also.

Therefore, it is necessary to inspect the folding accuracy of the corrugated cardboard sheet for box making, and various techniques have been developed for inspecting without relying on human visual inspection.
As a typical inspection method, for example, as shown in FIG. 14, a corrugated cardboard sheet is formed between the flap portions 12 in the joint portion 11 of one box-forming corrugated cardboard sheet 10, which is glued at its end. The gap portion 13 is photographed with a camera in a state in which the box making cardboard sheets 10 are stacked, and the size (gap) D of the gap portion 13 is obtained based on the photographed image information to determine whether the joint portion 11 is good or bad. (See Patent Documents 1 and 2).

In this technique, since images are usually taken in a state in which cardboards are stacked, the gap D between the flap portions 12 and 12 is determined by focusing on the gap between the flap portions 12 of the joint portion 11 from the taken images. I want to ask. However, the flap portion 12, since the concrete of the central core 14 hollow structures pasted liner 15 on both sides, the gap D between the flap portions 12 and 12, focusing on the liner 1 5 of the flap portion 12, The distance between the end portions 15a and 15a of the liners 15 and 15 is obtained as a gap D.

When the joint portion 11 is photographed by the camera, in the photographed image, the end portion of the liner 15 reflects light and the lightness becomes high, whereas the space in the gap portion 13 where nothing exists does not reflect light and thus the lightness is low. Become. The distances (gap) D between the liners 15 and 15 can be obtained by specifying the end portions 15a and 15a of the liners 15 and 15 of the flap portions 12 that form the gap portion 13 from the brightness and darkness of the photographed image.
JP 2001-124528 A Japanese Patent No. 3716159

  However, as described above, in order to obtain the distance between the liners 15 and 15 from the camera image, it is necessary to specify the end portions 15a and 15a of the liners 15 and 15, but the corrugated cardboard sheet 10 for box making is used. In the loaded state, as shown in FIG. 14, the liner 17 of the flap portion 16 that is not the gap portion 13 is adjacent to the upper and lower liners 15 of the target flap portion 12. In some cases, the adjacent liner 17 cannot be distinguished.

For this reason, the end portions 15a and 15a of the liners 15 and 15 cannot be specified, and the gap D that is the distance between the liners 15 and 15 cannot be obtained. In some cases, the judgment cannot be performed.
If the folding accuracy cannot be determined, there is a risk that the defective box-making corrugated cardboard sheet 10 will be shipped in a state where it is not understood.

  The present invention has been devised in view of such a problem. The gap portion of the joint portion of the stacked cardboard sheet is photographed, and the folding accuracy of the corrugated cardboard sheet is determined based on the photographed image. In this technology, the gap part of the gap part to be inspected can be reliably discriminated from the flap part adjacent thereto, so that the gap size can be reliably obtained and the folding accuracy can be reliably judged. An object of the present invention is to provide an apparatus and method for inspecting a joint part of a sheet material for box making, a method for inspecting a joint part, and an apparatus and method for inspecting the folding accuracy of the sheet material for box making.

  In order to achieve the above-mentioned object, a joint part inspection device for a box making sheet material according to the present invention (Claim 1) is a gap part between flap parts in a joint part of a box making sheet material that is folded and glued at an end. Is a joint part inspection device for a box making sheet material, which is photographed by a photographing device in a state where a large number of the sheet materials for box making are stacked and inspecting the joint portion based on image information from the photographing device. Moisture imparting moisture to an adjacent location of another flap portion adjacent to the gap portion in a state where the sheet material for box making is loaded upstream of the photographing device of the production line of the box making sheet material The apparatus is equipped with a near-infrared camera for the photographing apparatus.

It is preferable that the moisture applying device applies moisture of 1 to 5% by weight of the box-making sheet material to the adjacent portion (Claim 2).
Moreover, it is preferable that the said moisture provision apparatus is provided in the upstream rather than the folding completion location of the said sheet | seat for box making in the said production line (Claim 3).
In this case, the production line is provided with a sheet passage sensor that detects the passage of the box-making sheet material before folding is completed, and the moisture applying device is provided at a timing based on the sheet passage information from the sheet passage sensor. Preferably, a control device to be operated is provided (claim 4).

Moreover, it is preferable that the said moisture provision apparatus is provided in the paper feed part of the said production line (Claim 5).
Or it is preferable that the said moisture provision apparatus is provided in the printing part of the said production line (Claim 6).
A camera driving device that drives the near-infrared camera so that the near-infrared camera shoots while scanning the gap portion exposed on the side surface of the sheet material group made up of a large number of stacked sheet-making sheet materials. (Claim 7).

The sheet material group consisting of a large number of stacked box-making sheet materials, in which the gap portion faces the upstream and downstream sides in the transport direction, and the gap portion faces the left and right sides in the transport direction. a rotating device that rotates to, the near-infrared camera is preferably installed in the left and right sides of the conveying direction facing the said gap portion (claim 8).
Further, the moisture applying device applies moisture to the adjacent portions at the upstream end and the downstream end in the conveyance direction of the box-making sheet material, and the near-infrared camera has the stacked many box-forming sheet materials. It is preferable that the gap portion exposed on both side surfaces of the sheet material group consisting of is photographed (claim 9).

The folding accuracy inspection device for a box making sheet material of the present invention (Claim 10) includes a joint portion inspection device for a box making sheet material according to Claim 9 and the joint portion inspection device for each box making sheet material. It is characterized by having a determination device that determines the folding accuracy of the box-making sheet material by comparing the obtained gap size of each gap portion with a reference value .
The method for inspecting a joint portion of a sheet material for box making according to the present invention (Claim 11) is provided such that the gap portion between the flap portions in the joint portion of the sheet material for box making which is folded and glued at the end is used as the sheet for box making. A joint part inspection method for a box making sheet material that is photographed in a state in which a large number of materials are loaded and the joint part is inspected based on the photographed image information, and in the state in which the box making sheet material is loaded A moisture applying step for applying moisture to an adjacent portion of another flap portion adjacent to the gap portion, and a photographing step for photographing the gap portion using a near-infrared camera in a state where a large number of the sheet-making sheet materials are loaded. , Is characterized by having.

In the moisture application step, it is preferable that 1-5% by weight of the sheet material for box making is supplied to the adjacent portion.
Moreover, it is preferable that the said moisture provision step is implemented before the folding completion step of the said box making sheet material in the manufacturing line of the said box making sheet material (Claim 13).
In this case, it further includes a sheet passage detection step for detecting passage of the box making sheet material before completion of folding that travels through the production line, and the moisture application step is based on sheet passage information of the sheet passage detection step. It is preferable to implement at a timing (claim 14).

In addition, it is preferable that the moisture application step is performed in a sheet feeding stage of the production line for the box making sheet material (claim 15).
Or it is preferable to implement the said water | moisture-content provision step at the printing stage of the manufacturing line of the said box-making sheet | seat material (Claim 16).
Preferably, in the photographing step, photographing is performed while the near-infrared camera is scanned with respect to the gap portion exposed on the side surface of the stacked sheet material group made of a large number of sheets. ).

Before the photographing step, the sheet material group consisting of a large number of stacked box-making sheet materials is moved from the state in which the gap portion faces upstream and downstream in the conveyance direction. a rotating step of rotating to a state facing the left and right sides, the shooting step, it is preferable to shoot the gap portion facing to the left and right sides of the conveying direction by the near-infrared camera (claim 18).

Further, in the moisture application step, moisture is applied to each of the adjacent portions at the upstream end and the downstream end in the conveyance direction of the box-making sheet material, and in the photographing step, the stacked many It is preferable to photograph the gap portions exposed on both side surfaces of a sheet material group made of the box-making sheet material.
The folding accuracy inspection method for a box making sheet material of the present invention (Claim 20) is a folding accuracy inspection method for a box making sheet material using the joint portion inspection method for a box making sheet material according to Claim 19. The folding accuracy of the box-making sheet material is determined by comparing the gap size of each gap part at each end obtained by the joint part inspection method for each box-making sheet material with a reference value. It is a feature.

  According to the joint part inspection apparatus (Claim 1) and the method (Claim 11) of the box-making sheet material of the present invention, adjacent to another flap part adjacent to the gap part in a state where the box-making sheet material is loaded. If moisture is applied to the location and the vicinity of the gap is photographed with a near-infrared camera with the sheet material for box making loaded, this separate flap is absorbed by the absorption of moisture in another flap that is not the gap. The portion is not captured by the near-infrared camera, and the flap portion constituting the gap portion can be discriminated from another adjacent flap portion, so that the size of the gap portion can be reliably detected.

If granted 1-5 wt% of the water content of the sheet material to the adjacent portion of another flap, without giving excessive moisture in the sheet material for a box making, and, absorption of light is obtained, the near infrared The flap portion constituting the gap portion can be distinguished from another adjacent flap portion by the camera (claims 2 and 12).
If moisture is applied upstream of the folding completion position of the box-making sheet material in the production line, it is possible to prevent such a problem that moisture is erroneously applied to the flap portion to be inspected to form the gap portion. (Claims 3, 5, 6, 13, 15, 16).

By detecting the passage of the box-making sheet material before completion of folding and applying moisture to the box-making sheet material at a timing based on the sheet passing information, moisture can be given only to a required portion (claim) Item 4, 14).
The near-infrared camera scans the gap exposed on the side of the sheet material group and closes the side to take a picture in time. Information can be obtained, and the gap determination accuracy of the joint portion can be improved (claims 7 and 17).

  Further, the sheet material group is rotated from the state in which the gap portion is directed upstream and downstream in the conveyance direction to the state in which the gap portion is directed to the left and right sides in the conveyance direction, and the gap portion is photographed. Then, the near-infrared camera can be installed on the left and right sides in the conveyance direction, and the near-infrared camera can be installed so as not to obstruct the conveyance of the sheet material group (claims 8 and 18).

  The gap portions of the sheet material for box making are respectively located at the upstream end and the downstream end in the conveyance direction of the sheet material for box making, and moisture is given to the adjacent portions of the flap portions adjacent to the gap portions. By photographing each gap portion exposed in the case with a near infrared camera, it is possible to obtain the size of each gap as the folding accuracy inspection information of the box-making sheet material (claims 9 and 19). According to the folding accuracy inspection device (claim 10) and the method (claim 20) of the box making sheet material, the folding accuracy of the box making sheet material is reliably determined and inspected from such folding accuracy inspection information. be able to.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
FIGS. 1-7 is a figure explaining the joint part test | inspection apparatus and method of the sheet material for box making based on 1st Embodiment of this invention, and the bending accuracy test | inspection apparatus and method of the sheet material for box making, These This will be described with reference to the drawings.

(Box making machine)
First, the box making machine according to the present embodiment will be described. FIG. 2 is a configuration diagram illustrating the box making machine according to the present embodiment. In FIG. 2, a process of processing a corrugated cardboard sheet into a box making sheet material is shown above the apparatus configuration separately from the apparatus configuration. Yes. As shown in FIG. 2, the box making machine is provided with a paper feeding unit 1, a printing unit 2, a paper discharge unit 3, a die cutting unit 4, a folder gluer unit 5, and a counter ejector unit 6 from the upstream side.

In the sheet feeding unit 1, a large number of plate-like corrugated cardboard sheets 10 a are loaded and fed to the printing unit 2 one by one.
The printing unit 2 includes printing units 2 a to 2 d having a predetermined number of colors (here, four colors). In the printing unit 2, the ink of each job is applied to the corrugated cardboard sheet 10 a that is conveyed one by one by the conveyance conveyor 7. Print sequentially.

In the paper discharge unit 3 and the die cut unit 4, the cardboard sheet 10a printed by the printing unit 2 performs grooving and ruled line insertion.
Then, the folder gluer unit 5, and glued to the margin of the left-right direction end of the cardboard sheet 10a which is a grooved and lines insertion, as the left and right end portions of the cardboard sheet 1 0a is polymerized in the back (downward) bending by performing processing, the sheet material 10 for manufacturing a box with the left and right end portions of the cardboard sheet 1 0 a folded and adhered by glue.

  In the counter ejector section 6, the box making sheet material 10 processed by the folder gluer section 5 is counted and stacked on the stacker. When a predetermined number of sheet-making sheet materials 10 are stacked, this sheet material group 100 is shipped as one unit.

(Joint inspection device and bending accuracy inspection device)
As shown in FIG. 1, the joint inspection apparatus according to the present embodiment includes cameras 23 a and 23 b as imaging devices (indicated by reference numeral 23 when the cameras 23 a and 23 b are not distinguished), and the camera 23. As an inspection of the joint portion 11 (see FIG. 14), the gap D of the gap portion 13 of the joint portion 11 is calculated based on the image information, and the “folding accuracy” of the box-making sheet material 10 is determined from this calculation result. A computer 20 as an arithmetic device, and in addition to this, a water injection device (moisture application device) 22 characteristic of this device, and a sheet passage sensor 21 for detecting the passage of the sheet material 10 for box making. I have.

  The water injection device 22 is a corrugated sheet 10a in the middle part of the folder gluer part 5 before the folding of the box-making sheet material 10, and the left and right ends of the corrugated board sheet 10a are the middle parts (width direction) of the corrugated sheet 10a. Are disposed on the upstream side and the downstream side at locations separated from the intermediate portion), and water is simultaneously applied to the same corrugated cardboard sheet 10a. Here, each water-injection apparatus 22 is diagonally arrange | positioned so that water may be injected to the edge of the intermediate part of the cardboard sheet | seat 10a from the upper direction of the running track of the cardboard sheet | seat 10a. That is, the downstream water injection device 22 is installed on the oblique upstream side, and the upstream water injection device 22 is installed on the oblique downstream side with the injection ports facing each other.

  Further, the sheet passing sensor 21 is disposed upstream of the water jetting device 22 in the middle part of the folder gluer unit 5, and a transmissive sheet sensor is applied. The transmission type sheet sensor 21 is configured to oppose the light irradiation unit 21a that irradiates light from one surface side (here, the upper surface side) of the cardboard sheet 10a toward the cardboard sheet 10a, and the irradiation light of the light irradiation unit 21a. The light receiving unit 21b is disposed on the optical axis. When the cardboard sheet 10a passes, the light from the light irradiation unit 21a is blocked by the cardboard sheet 10a and is not received by the light receiving unit 21b. Is detected.

  In the present embodiment, since the optical axis of the irradiation light is arranged so as to be perpendicular to the surface of the corrugated cardboard sheet 10a, the passage of the corrugated cardboard sheet 10a can be detected with high accuracy, and the irradiation light is blocked by the corrugated cardboard sheet 10a. Then, it can be determined that the leading edge of the sheet 10a has passed on the optical axis (that is, the installation point of the sheet passing sensor 21), and when the irradiation light is received again thereafter, the rear end of the sheet 10a is on the optical axis (sheet passing sensor). It is possible to determine that the vehicle has passed the installation point 21), and the timing of the injection device is calculated from the sheet speed and the distance between the sheet sensor and the injection device, and water is injected toward the end face of the cardboard sheet.

  The computer 20 functioning as a control device for the water ejection device 22 receives the detection signal of the sheet passage sensor 21 and, for example, the light is blocked (that is, the leading edge of the sheet 10a has passed the installation point of the sheet passage sensor 21). The sheet conveyance speed V and the water ejection from the sheet passing sensor 21 are based on the time t0 or the time t0 when the light is received again (that is, when the rear end of the sheet 10a passes the installation point of the sheet passing sensor 21). An operation command signal is sent to the water injection device 22 so that water is injected from the water injection device 22 at a time t1 (t0 + d / V) which is a timing calculated from the distance d to the device 22.

Supply of water, the flap portion 16 adjacent to the gap portion 13 of the joint portion 11 of the folded sheet-shaped corrugated board box 10 for only those rows of cormorants vicinity of the periphery (see FIG. 14), sheet box making to produce It is necessary to change the water supply position according to the size of the material 10 and the like. Therefore, the water injection device 22 is movable in the width direction while keeping the sheet traveling direction position of the production line constant by a movement mechanism (not shown), and based on the box shape data or the slotter knife information of the die cut unit 4, The water injection device 22 is automatically or manually moved to a predetermined position to inject water.

The water is supplied by the water injection device 22 in view of the absorption wavelength band of water. That is, the absorption wavelength band of water, as shown in FIG. 3, there 1200～1600Nm, or near 1700～2200Nm, light in this wavelength band is absorbed in water, transmission of light as shown in FIG. 4 If the rate is low and a camera that captures light in this wavelength band captures water or an object that contains water to some extent, the light in that wavelength band is absorbed by water or the object and cannot be captured by the camera. A camera that captures light in such a wavelength band includes a so-called near-infrared camera that captures light (electromagnetic waves) having a wavelength of approximately 700 to 2500 nm and is close to visible light (red). This near-infrared camera is used.

  As described above, when measuring the gap size D of the gap portion 13 of the joint portion 11, pay attention to the end edges of the liners 15 and 15 of the flap portions 12 and 12 constituting the gap portion 13. The distance between these edges is calculated. However, the liners 15 and 15 having the gap portion 13 are adjacent to the liners 17 and 17 not having the gap portion 13, and it is difficult to distinguish the liners 15 and 15 from the liners 15 and 15.

  If water is applied to the important points of the liners 17, 17 that do not have the gap portion 13 (locations adjacent to the gap portion 13 of the folded box-making sheet material 10) and taken by the near-infrared camera 23, the gap portion 13 In the vicinity, the liners 17 and 17 having no gap portion 13 are not captured, and only the liners 15 and 15 having the gap portion 13 are captured. Therefore, in the present apparatus, water is applied to the liners 17 and 17 that do not have the gap portion 13, and as shown in FIG. 5, a sheet material group 100 on which a large number of box-making sheet materials 10 are stacked is used as the gap portion. A near-infrared camera is used for the cameras 23a and 23b that shoot from each side on which 13 appears.

  The supply of water by the water jetting device 22 is adjusted to an amount of about 1 to 5% (weight%) in terms of moisture content (weight of water / weight of paper) at the key points of the cardboard sheet. In other words, the injection amount is adjusted so that the moisture content at the key points of the corrugated board sheet increases by about 1 to 5%. This is because if the water supply is excessive, the corrugated cardboard sheet may be deformed by the subsequent water evaporation, and if the water supply is insufficient, the light absorption in the near infrared region becomes insufficient.

  The computer 20 includes, as a functional element as a control device of the water injection device 22, an injection timing calculation unit 20a that calculates a water injection timing by the water injection device 22 from a detection signal of the sheet passage sensor 21, and an injection timing calculation unit 20a. A command signal output unit 20b that outputs an injection command signal to the water injection device 22 at the calculated timing is provided.

  Further, the computer 20 has a binary function for binarizing the images obtained from the cameras 23a and 23b as a functional element as a calculation device (determination device) for determining the “folding accuracy” of the box-making sheet material 10. From the binarization processing means 20c and the image binarized by the binarization processing means 20c, the respective edges of the liners 15 and 15 of the flap portions 12 and 12 constituting the gap portion 13 are specified, and these edges are identified. The gap calculation means 20d for calculating the distance (gap) D between the edges and the gaps D and D on both side surfaces of the sheet material group 100 calculated by the gap calculation means 20d are compared with the reference value, and the “folding accuracy” is Folding accuracy determining means 20e for performing the determination is provided.

  In the folding accuracy determination unit 20e, for example, the gaps D and D on both side surfaces of the sheet material group 100 calculated by the gap calculation unit 20d are in the region near the reference value or more than the region near the reference value. It is determined whether or not it is a “fish tail state” in which one gap D is smaller than the reference value but the other gap D is larger than the reference value.

(Function, effect)
The box making sheet material joint inspection apparatus and the box making sheet material folding accuracy inspection apparatus according to the first embodiment of the present invention are configured as described above. For example, as shown in the flowchart of FIG. The joint (inspection) and the bending accuracy can be inspected by the procedure (method). Note that the flow shown in FIG. 7 is described focusing on one cardboard sheet 10a.

  As shown in FIG. 7, first, the corrugated cardboard sheet 10a is fed from the sheet feeding unit 1 to the printing unit 2 (step S10; sheet feeding step), and a predetermined number of colors (here) is printed on the surface of the cardboard sheet 10a by the printing unit 2. In this case, a predetermined pattern or character of 4 colors) is printed (step S20; printing step). After that, the paper discharge unit 3 and the die cut unit 4 perform grooving and ruled lines on the corrugated cardboard sheet 10a (step S30; grooving and ruled line setting step), and the process proceeds to the folder gluer unit 5 where bending and joining are performed. (Step S40; bending and joining step).

  In the present apparatus, a process of applying moisture to a required portion of the flap portion 16 (step S50; moisture applying step) is performed during the bending / joining step. This moisture application step S50 is performed prior to completion of folding the folder gluer section 5 on the box-making sheet material 10 in the production line of the box-making machine. In the present embodiment, at the timing calculated by the injection timing calculation means 20a based on the detection signal of the sheet passage sensor 21, the injection command signal output from the command signal output unit 20b is bent to the injection location of the water injection device 22. Water is sprayed onto a required portion of the flap portion 16 when the intermediate box-making sheet material 10 arrives.

Thereafter, the box-making sheet material 10 is stacked on the stacker while being counted by the counter ejector unit 6 (step S60; counting / stacking step). And the gap part 13 of each box making sheet | seat 10 is image | photographed using the near-infrared camera 23 from the both sides of the sheet | seat material group 100 on which the predetermined number of box forming sheet | seat materials 10 are piled up (step S70; imaging | photography). Step).
The captured image around the gap portion 13 is binarized by the binarization processing means 20c (step S80; binarization processing step). From the binarized image, the gap calculation means 20d 13 is specified, and the distance (gap) D between these edges is calculated (step S90; gap calculation step). Then, the folding accuracy determination means 20e compares the calculated gaps D and D on both sides of each box-making sheet material 10 of the sheet material group 100 with a reference value to determine "folding accuracy" (step) S100: Folding accuracy judgment output step).

When the gap D is obtained in this way, the image area captured by the near-infrared camera 23 has an area between the flap portions 12 of the joint portion 11 of each corrugated cardboard sheet 10 as shown in FIG. There is a gap portion 13, and a flap portion 16 that does not have the gap portion 13 is positioned adjacent to the top and bottom of the gap portion 13. The size (gap) D of the gap portion 13, focusing on the liner 1 5 of the flap portion 12, the end portion 15a of the liner 15, 15, but obtains the distance between 15a, above or below the respective liners 15, Since the liner 17 of the flap portion 16 without the gap portion 13 is adjacent, the liner 15 to be detected cannot be discriminated from the adjacent liner 17.

Was only, in this apparatus, the liner 17 has been applied the water is not Utsura be captured by the near-infrared camera 23, as shown in FIG. 6 (b), the liner flap portion 12 with a gap portion 13 Only 15 and 15 are shown.
Accordingly, the end portions 15a and 15a of the liners 15 and 15 of the flap portion 12 constituting the gap portion 13 can be reliably determined, and the gap D can be reliably detected.

In particular, since the moisture of 1 to 5% by weight of the sheet material is given to the required portion of the flap portion 16, light absorbing action can be obtained without giving excessive moisture to the sheet material , and the gap portion 13 is configured. Thus, the end portions 15a and 15a of the liners 15 and 15 of the flap portion 12 can be reliably determined.
In addition, since moisture is applied upstream of the folding completion of the box-making sheet material 10 in the production line, there is a problem that moisture is erroneously applied to the flap portion 12 to be inspected forming the gap portion 13. Can be prevented.

Further, by the sheet passage sensor 2 1, because the moisture supply to the sheet-shaped corrugated board box 10 at a timing based on the pass information to detect the passage of the sheet material for the front folding complete box making only required positions Moisture can be applied.
Thus, since the size of the gap of each gap portion appearing on both end faces (the upstream end and the downstream end in the conveyance direction of the box making sheet material) of the box making sheet material can be obtained with certainty, the box making sheet It is possible to reliably inspect the bending accuracy of the material.

[Second Embodiment]
FIG. 8 is a view for explaining a box making sheet material joint part inspection apparatus and method and a box making sheet material folding accuracy inspection apparatus and method according to the second embodiment of the present invention. explain.
As shown in FIG. 8, in the present embodiment, moisture is applied to the liner 17 at the time of paper feeding by the paper feeding unit 1. However, when moisture is applied to the liner 17 at the folder gluer portion (folded portion) 5, the position of the edge in the width direction position of the liner 17 adjacent to the gap portion 13 is obtained from the box shape data and set. To do. Other configurations are the same as those of the first embodiment.

  According to such a configuration, moisture is applied to the corrugated cardboard sheet 10a before movement, so that no sheet passing sensor is required, and moisture is applied to the liner 17 in the state of the flat corrugated cardboard sheet 10a. Thus, it is possible to reliably prevent a problem that moisture is mistakenly applied to the liners 15 and 15 of the flap portion 12 that constitutes.

[Third Embodiment]
FIG. 9 and FIG. 10 are diagrams for explaining a box making sheet material joint inspection apparatus and method, and a box making sheet material folding accuracy inspection apparatus and method according to the third embodiment of the present invention. This will be described with reference to the drawings.

As shown in FIGS. 9 and 10, in this embodiment, moisture is applied to the liner 17 during printing by the printing unit 2. However, when moisture is applied to the liner 17 at the folder gluer portion (folded portion) 5, the position of the edge in the width direction position of the liner 17 adjacent to the gap portion 13 is obtained from the box shape data and set. To do. Other configurations are the same as those in the first and second embodiments.

  According to such a configuration, moisture can be applied to the corrugated cardboard sheet 10a in accordance with the printing positioning, so that a sheet passing sensor is not necessary. Since high-precision positioning control is performed in the printing unit 2, moisture can be appropriately applied to a predetermined portion of the corrugated cardboard sheet 10a by using this control information. Further, since moisture is applied to the liner 17 in the state of the flat corrugated cardboard sheet 10a, it is possible to reliably prevent a problem that moisture is erroneously applied to the liners 15 and 15 of the flap portion 12 constituting the gap portion 13. .

[Fourth Embodiment]
FIG. 11 is a diagram for explaining a box making sheet material joint part inspection apparatus and method, and a box making sheet material folding accuracy inspection apparatus and method according to the fourth embodiment of the present invention. explain.
As shown in FIG. 11, in the present embodiment, the near infrared cameras 23c and 23d are photographed while scanning a plurality of gap portions exposed side by side on the side surface of the sheet material group 100 while scanning in the alignment direction. A camera driving device (not shown) for driving the infrared cameras 23c and 23d is provided.

  According to such a configuration, the near-infrared cameras 23c and 23d scan each gap portion 13 exposed on the side surface of the sheet material group 100 while close-up, and shoot the side portion in time, With a near-infrared camera with a limited resolution, high-accuracy image information can be obtained, and the gap determination accuracy of the joint can be improved.

[Fifth Embodiment]
FIGS. 12 and 13 are views for explaining a box making sheet material joint inspection apparatus and method, and a box making sheet material folding accuracy inspection apparatus and method according to the fifth embodiment of the present invention. This will be described with reference to the drawings.

  As shown in FIG. 12, the side surface of the sheet material group 100 that exposes each gap portion 13 that the near-infrared cameras 23, 23 want to capture faces in the transport direction, so the sheet material group as shown in FIG. If the near-infrared camera 23 is arranged in front of the side surface of the sheet 100, it will interfere with the conveyance of the sheet material group 100. Therefore, as shown in FIG. You have to shoot from below. In this case, as shown in FIG. 12C, the image is slightly crushed up and down, and the determination accuracy decreases accordingly.

  Therefore, as shown in FIG. 13A, instead of disposing the near-infrared camera 23 in front of the sheet material group 100 with the side surface thereof directed in the conveying direction, as shown in FIG. The group 100 is rotated 90 degrees around the vertical axis. Then, as shown in FIG. 13C, the near-infrared camera 23 is arranged so that the side surface of the sheet material group 100 is shifted by 90 degrees from the conveyance direction and the side surface of the sheet material group 100 is photographed from the front. Thus, the image can be prevented from being crushed up and down.

  According to such a configuration, the side surface of the sheet material group 100 can be photographed from the front while preventing the near-infrared camera 23 from interfering with the conveyance path, and high-precision image information can be obtained. The gap determination accuracy can be improved.

(Other)
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be implemented with appropriate modifications, omissions, or combinations without departing from the spirit of the present invention. .

It is a block diagram explaining the joint part test | inspection apparatus and bending accuracy test | inspection apparatus of the sheet | seat for box making concerning 1st Embodiment of this invention. It is a block diagram of the box making machine concerning each embodiment of the present invention. It is a figure which shows the characteristic of the light absorption coefficient of the water concerning each embodiment of this invention. It is a figure which shows the characteristic of the light transmittance of the water concerning each embodiment of this invention. It is a perspective view of the sheet group which shows the installation condition of the near-infrared camera concerning 1st Embodiment of this invention. FIG. 7 is a side view showing a captured image [FIG. 6B] of the near-infrared camera according to the first embodiment of the present invention in comparison with a side configuration [FIG. 6A] of a sheet group. It is a flowchart which shows the joint part test | inspection method and bending accuracy test method of the sheet | seat for box making concerning 1st Embodiment of this invention. It is a perspective view which shows the water provision condition concerning 2nd Embodiment of this invention. It is a side view of the printing part which shows the water provision condition concerning 3rd Embodiment of this invention. It is a top view of the corrugated board sheet which shows the water provision condition concerning 3rd Embodiment of this invention. It is a perspective view of the sheet | seat group which shows the installation condition of the near-infrared camera concerning 4th Embodiment of this invention. It is a figure shown about the installation condition of the near-infrared camera concerning 5th Embodiment of this invention, (a), (b) is a perspective view of a sheet group, (c) is a figure which shows the side image of a sheet group. is there. It is a figure shown about the installation condition of the near-infrared camera concerning 5th Embodiment of this invention, (a), (b), (c) is a perspective view of a sheet group. It is an end view of the sheet material for box making explaining the joint part inspection of the conventional sheet material for box making and the subject.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Paper feed part 2 Printing part 2a-2d Printing unit 3 Paper discharge part 4 Die cut part 5 Folder gluer part 6 Counter ejector part 7 Conveyor 10 Sheet making sheet material 10a Corrugated cardboard sheet 11 Joint part 12 of box making cardboard sheet 10 Flap part in joint part 13 Gap part 14 Core 15 Liner 16 Flap part not having gap part 13 17 Liner of flap part 16 Computer as calculation device and determination device 21 Sheet passage sensor 22 Water injection device (moisture application device) )
23,23a, 23b, 23c, 23d near infrared camera 100 sheet material group

Claims (20)

The gap portion between the flaps in the joint portion of the box-making sheet material that is folded and glued at the end is photographed by the photographing device in a state where a large number of the sheet-making sheet materials are stacked, and image information from the photographing device A joint part inspection device for a sheet material for box making that inspects the joint part based on
Moisture imparting device for imparting moisture to an adjacent location of another flap portion adjacent to the gap portion in a state where the sheet material for box making is loaded upstream of the photographing device on the production line of the box making sheet material With
A near-infrared camera is used for the photographing apparatus. 2. The apparatus for inspecting a joint part of a sheet material for box making according to claim 1, wherein the moisture applying apparatus gives moisture of 1 to 5% by weight of the sheet material for box making to the adjacent portion. The joint inspection of a box-making sheet material according to claim 1 or 2, wherein the moisture applying device is provided upstream of a folding completion position of the box-making sheet material in the production line. apparatus. The production line is provided with a sheet passage sensor for detecting the passage of the box-making sheet material before folding is completed,
The joint part inspection device for a sheet material for box making according to claim 3, further comprising a control device for operating the moisture applying device at a timing based on sheet passing information from the sheet passing sensor. The said moisture provision apparatus is provided in the paper feed part of the said production line, The joint part inspection apparatus of the sheet material for box making of any one of Claims 1-3 characterized by the above-mentioned. The said moisture provision apparatus is provided in the printing part of the said production line, The joint part test | inspection apparatus of the sheet | seat for box making of any one of Claims 1-3 characterized by the above-mentioned. A camera driving device that drives the near-infrared camera so that the near-infrared camera shoots while scanning the gap portion exposed on the side surface of the sheet material group made up of a large number of stacked sheet-making sheet materials. The joint part inspection device for a sheet material for box making according to any one of claims 1 to 6, characterized by comprising: The sheet material group consisting of a large number of stacked box-making sheet materials, in which the gap portion faces the upstream and downstream sides in the transport direction, and the gap portion faces the left and right sides in the transport direction. a rotating device that rotates to,
The joint portion of the sheet material for box making according to any one of claims 1 to 7, wherein the near-infrared camera is installed on the left and right sides of the conveyance direction facing the gap portion. Inspection device. The moisture applying device applies moisture to the adjacent portions of the upstream end and the downstream end in the conveyance direction of the box-making sheet material,
The said near-infrared camera is comprised so that the said gap part exposed on the both sides | surfaces of the sheet | seat group which consists of the said many sheet | seat materials for the box making loaded may be image | photographed. The joint part test | inspection apparatus of the sheet material for box making of any one of -8. A joint part inspection device for a sheet material for box making according to claim 9,
A determination device that determines the folding accuracy of the sheet material for box making by comparing the size of the gap of each gap portion obtained by the joint part inspection device for each box making sheet material with a reference value. A folding accuracy inspection device for a box-making sheet material. The gap between the flaps in the joint portion of the box-making sheet material that is folded and glued at the end is photographed in a state where a large number of the sheet-making sheet materials are stacked, and the joint portion is based on the photographed image information. A method of inspecting a joint part of a sheet material for box making,
In a state where the sheet material for box making is loaded, a moisture application step for applying moisture to an adjacent part of another flap part adjacent to the gap part,
A method for inspecting a joint portion of a sheet material for box making, comprising: a photographing step of photographing the gap portion using a near-infrared camera in a state where a large number of the sheet materials for box making are stacked. The method for inspecting a joint portion of a sheet material for box making according to claim 11, wherein in the moisture applying step, moisture of 1 to 5% by weight of the sheet material for box making is given to the adjacent portion. 13. The box making sheet material according to claim 11 or 12, wherein the moisture applying step is performed before a folding completion step of the box making sheet material in a production line of the box making sheet material. Joint inspection method. A sheet passing detection step for detecting the passage of the sheet material for box making before completion of folding traveling through the production line,
The method for inspecting a joint part of a sheet material for box making according to claim 13, wherein the moisture applying step is performed at a timing based on sheet passing information of the sheet passing detecting step. The joint inspection of a box-making sheet material according to any one of claims 11 to 13, wherein the moisture application step is performed at a paper feeding stage of the production line for the box-making sheet material. Method. The method for inspecting a joint part of a sheet material for box making according to any one of claims 11 to 13, wherein the moisture applying step is performed at a printing stage of a production line of the sheet material for box making. . In the photographing step, photographing is performed while the near-infrared camera is scanned with respect to the gap portion exposed on a side surface of the sheet material group including a large number of stacked sheet-forming sheet materials. Item 17. A method for inspecting a joint part of a sheet material for box making according to any one of items 11 to 16. Before the photographing step, the sheet material group consisting of a large number of stacked box-making sheet materials is moved from the state in which the gap portion faces upstream and downstream in the conveyance direction. a rotating step of rotating to a state facing the right and left sides,
In the said imaging step, the said gap part which faced the left-right side of the conveyance direction is image | photographed with the said near-infrared camera, The sheet | seat for box making of any one of Claims 11-17 characterized by the above-mentioned. Joint part inspection method. In the moisture application step, moisture is applied to each adjacent portion of the upstream end and the downstream end in the conveyance direction of the box-making sheet material,
The photographing step includes photographing the gap portions exposed on both side surfaces of the sheet material group made of a large number of stacked sheet-making sheet materials with the near-infrared camera. The joint part inspection method of the sheet | seat material for box manufacture of any one of 18. A folding accuracy inspection method for a box making sheet material using the joint portion inspection method for a box making sheet material according to claim 19,
It is characterized by determining the folding accuracy of the sheet material for box making by comparing the gap size of each gap part at each end obtained by the joint part inspection method for each box making sheet material with a reference value. A method for inspecting the folding accuracy of sheet materials for box making.

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