JP2013156037A - Carton formation inspection method and carton formation inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carton formation inspection method and a carton formation inspection device which are applicable to any carton formation facility, quickly and precisely detects gap intervals of flaps at a joint part without being affected by collapse or deformation of an end surface, and accurately inspecting final fold precision of a carton formation sheet material.SOLUTION: In a carton formation inspection method and a carton formation inspection device for inspecting fold precision of a carton formation sheet material 10 which is folded and has its end part adhered, a sheet material bundle 50 in which a plurality of carton formation sheet materials 10 are laminated is inspected to be overlapped displaced at an inspection position, and gap intervals of all the carton formation sheet materials 10 are simultaneously detected by gap detection means 120 from the sheet surface side.

Description

  The present invention detects the gap interval in the joint portion of the flap connected to the side plate of the box making sheet material which is folded and fixed at the end by the interval detecting means, and checks the folding accuracy of the box making sheet material The present invention relates to a box making inspection method and a box making inspection apparatus.

In general, a corrugated cardboard box is formed by bonding adhesive pieces provided on the side surface of one side plate to the other side plate to form a joint portion to form a rectangular tube-shaped body portion, which is connected to each side plate. The bottom part and the top part are formed by the flaps, but are usually distributed and stored in a box-making sheet material that is folded and fixed at the end part, and assembled into a box shape when used as a box.
As shown in FIG. 1, a box making sheet material 10 is formed by punching a necessary portion from a corrugated cardboard sheet by box making means, and bonding pieces 13 are superposed and bonded to a side plate 42 at the other end. Manufactured to form part.
At this time, if the folding accuracy of the box-making sheet material 10 is low, the overlapping width of the adhesive piece 13 and the side plate 42 at the other end in the joint portion may be different or may be overlapped obliquely, and the box shape intended for use as a box Therefore, the folding accuracy of the box making sheet material 10 manufactured by the box making means needs to be stably maintained.
The folding accuracy of the box-making sheet material 10 is such that the gaps 11 formed between the flaps 21 and 31 connected to one side plate 41 and the flaps 22 and 32 connected to the other side plate 42 in the joint portion, It can be estimated by inspecting whether or not 12 is formed as prescribed, and in order to maintain the folding accuracy of the box-making sheet material 10, the gap interval is detected to make the box-making sheet material. Various methods and apparatuses for inspecting 10 folding accuracy have been proposed.

For example, by detecting the gap gap of the flaps connected to the side plates in the joint part of the box-making sheet material one by one from the sheet surface side by the interval detecting means, the folding accuracy of the box-making sheet material is inspected. What was made to perform is well-known (for example, refer patent document 1, 2 grade | etc.,).
In addition, in the state of a sheet material bundle in which a plurality of sheet-making sheet materials are stacked, the gap detection means determines the gap interval of the flaps connected to the side plates in the joint portions of the plurality of box-making sheet materials. It is also known that a plurality of stacked sheet-making sheet materials are inspected at the same time by detecting from the end face side of the sheet material (see, for example, Patent Documents 3 and 4).

JP 58-205754 A (all pages, all figures) Japanese Patent Laid-Open No. 9-22464 (all pages, all figures) Japanese Unexamined Patent Publication No. 2003-337012 (all pages, all figures) JP 2001-330414 A (all pages, all figures)

However, when the gap interval is detected before bonding, there is a risk of misalignment in the bonding process. With the known method and apparatus described in Patent Document 1, the accuracy of the final box-making sheet material is expected. There was a problem that could not be guaranteed accurately.
In addition, a plurality of sheet materials for box making are generally stacked immediately after being manufactured and conveyed as a sheet material bundle. For example, the box making means itself performs stacking of sheet materials for box making. However, there is a problem that it is difficult to apply a known method and apparatus as described in Patent Document 2 above.
In addition, even if it can be configured to detect with the interval detection means before stacking the sheet material for box making, the inspection is performed within the manufacturing time (tact time) per sheet of the box making sheet material in the box making means. There is a problem that known methods and apparatuses as described in Patent Documents 1 and 2 become an obstacle to shortening the tact time.
Furthermore, the box-making sheet material immediately after manufacture is in a state where the adhesive is not completely dried and fixed, and is often subjected to irregular stress when folded, and the joint part after drying and fixing of the adhesive The overlapping width and angle between the adhesive piece and the side plate at the other end may vary irregularly, and even with a known method and apparatus as described in Patent Document 2, the accuracy of the final sheet material for box making There was a problem that could not be guaranteed accurately.

On the other hand, in the known methods and apparatuses as described in Patent Documents 3 and 4, the above-described problem caused by detecting the joint portions of the box-making sheet material one by one from the sheet surface side by the interval detecting means. Can be solved to some extent.
However, when the sheet material for box making is corrugated cardboard, the gap cross section does not have a straight edge, so there is a problem that it is difficult to accurately detect the gap interval from the end face side at high speed. It was.
Also, the end face of the sheet material for box making tends to be crushed or deformed, and even if the end face is crushed or deformed to the extent that there is no problem as a product, the actual gap interval can be accurately determined only by information on the end face of the sheet material bundle There is a possibility that a non-defective product may be detected as a defective product, or a defective product may be determined as a non-defective product.

  Therefore, the present invention solves the problems of the known inspection methods and inspection apparatuses as described above, and can be applied to any box making equipment without being affected by crushing or deformation of the end face. An object of the present invention is to provide a box making inspection method and an inspection apparatus that can detect the gap gap of the flap at the joint portion at high speed and accurately and can accurately inspect the folding accuracy of the final box making sheet material. To do.

  The invention according to claim 1 detects the gap interval of the flaps connected to the side plates in the joint portion of the box-making sheet material that is folded and fixed at the end by the interval detection means, and the box-making sheet material A box-making inspection method for inspecting the folding accuracy of the box-making, wherein the sheet-making sheet material is conveyed to an inspection position as a stack of stacked sheet materials, and at the inspection position, the sheet material bundle is The sheet materials for box-making are shifted from each other in a state having a predetermined distance in a predetermined direction parallel to the sheet surface. The said subject is solved by detecting the said gap space | interval of the sheet material for sheets from the sheet surface side.

In the invention according to claim 2, in addition to the configuration of the box making inspection method according to claim 1, two inspection positions are provided in the conveying direction of the sheet material bundle, and the sheet material bundle is provided at the two inspection positions. The above-mentioned problems are solved by shifting the sheet-forming sheet materials in opposite directions.
In the invention according to claim 3, in addition to the configuration of the box making inspection method according to claim 1 or 2, at the inspection position, the sheet material for box making of the sheet material bundle is in a direction orthogonal to the conveying direction. The above-mentioned problem is solved by shifting to
In the invention according to claim 4, in addition to the configuration of the box making inspection method according to any one of claims 1 to 3, at the inspection position, the conveyance of the sheet material bundle is stopped by the stop unit, and the sheet In a state in which the conveyance of the material bundle is stopped, it is assumed that the overlap is shifted, and after the detection by the interval detection unit is performed, the shifted overlap is restored, and then the stop of the transfer by the stop unit is released. The above-mentioned problem is solved.
In addition to the structure of the box-making inspection method according to any one of claims 1 to 4, the invention according to claim 5 is a horizontal direction with a tilting pressing plate in which the end face of the sheet material bundle is inclined in advance. The above-mentioned problem is solved by making the overlap shifted by pressing to the above.
In the invention according to claim 6, in addition to the configuration of the box-making inspection method according to any one of claims 1 to 5, the interval detection means determines the number of sheet-making sheets of the sheet material bundle. By detecting this, the above-mentioned problem is solved.

  In the invention according to claim 7, the gap between the conveying means for conveying the box-forming sheet material folded and fixed at the end, and the flap connected to the side plate in the joint portion of the box-forming sheet material is determined. A box making inspection apparatus comprising an interval detecting means for detecting and an inspection station for detecting by the interval detecting means, wherein the conveying means is a state of a sheet material bundle in which a plurality of the box making sheet materials are stacked. The inspection station is configured to transport the inspection sheet to the inspection station by pressing the end surface of the sheet material bundle and having a predetermined distance in a predetermined direction parallel to the sheet surface. Tilting means for disposing the overlapped sheet is disposed, and the interval detecting means moves the sheet material bundle that has been displaced in the inspection station from the sheet surface side to the gap. It is positioned to detect the septum by inspecting the bending accuracy of the box-making sheet material is intended to solve the above problems.

In the invention according to claim 8, in addition to the configuration of the box making inspection apparatus according to claim 7, two inspection stations are provided in the conveyance direction of the sheet material bundle, and are arranged at the two inspection stations. Each of the tilting means solves the above problem by shifting the end face of the sheet material bundle in the opposite direction.
According to the ninth aspect of the present invention, in addition to the configuration of the box making inspection apparatus according to the seventh or eighth aspect, the tilting means of the inspection station causes the end face of the sheet material bundle to extend in a direction perpendicular to the conveying direction. The problem is solved by shifting.
In the invention according to claim 10, in addition to the configuration of the box making inspection apparatus according to any one of claims 7 to 9, the inspection station further includes stop means for temporarily stopping the conveyed sheet material bundle. By having it, the said subject is solved.
In addition to the configuration of the box making inspection device according to any one of claims 7 to 10, the tilting means includes a tilting pressing plate that can tilt and the tilting pressing plate. It has the tilting pressing plate pressing means that reciprocates in the horizontal direction and presses the end face of the sheet material bundle, thereby solving the above-mentioned problems.
In the invention according to claim 12, in addition to the configuration of the box making inspection apparatus according to any one of claims 7 to 11, the interval detection unit is imaged with an imaging unit that captures a two-dimensional image. The above-described problems are solved by providing image processing means for processing the two-dimensional image and calculating the gap interval of all the box-making sheet materials of one sheet material bundle.
In the invention according to claim 13, in addition to the configuration of the box making inspection apparatus according to claim 12, the interval detection unit includes a flap that is connected to side plates on both sides of the joint unit. The above-mentioned problem is solved by calculating the gap interval from the interval of the marks attached to each.
In the invention according to claim 14, in addition to the configuration of the box making inspection apparatus according to any one of claims 7 to 13, the interval detecting means determines the number of sheet materials for box making of the sheet material bundle. By providing the number detecting means for detecting, the above-mentioned problem is solved.

According to the box making inspection method of the invention according to claim 1 and the box making inspection apparatus of the invention according to claim 7, it is possible to inspect simultaneously in the state of a sheet material bundle in which a plurality of box making sheet materials are stacked. Because it is possible, inspection is possible at high speed, it does not become an obstacle to shortening the tact time of the box making means, it can be applied to any position in the middle of conveyance, the flexibility of equipment layout is improved, and inspection can be performed with stable adhesion Therefore, the accuracy of the final box forming sheet material can be accurately guaranteed.
In addition, since the sheet material bundle that has been deviated by the distance detection means is detected from the sheet surface side, it is possible to detect the gap gap of the flap at the joint portion at a position away from the end surface of the box-making sheet material. The gap interval can be accurately detected without being affected by crushing or deformation of the sheet, and the final folding accuracy of the box-making sheet material can be accurately inspected.

According to the structure of this Claim 2 and Claim 8, it becomes possible to detect the gap gap of the flap of the both sides in a joint part, and to test | inspect the folding accuracy of the sheet material for box making more correctly Can do.
According to the configurations of claims 3 and 9, since the position of the gap to be detected is located on both sides of the transport line, the interval detection means can be disposed at a position with little interference with the transport equipment, It is possible to prevent the detection accuracy by the interval detection means from being lowered due to the influence of vibrations of the conveying equipment, etc., and maintenance is facilitated, and the folding accuracy of the box-making sheet material can be inspected more accurately.
According to the configurations of the fourth and tenth aspects of the present invention, since the plurality of box-forming sheet materials of the sheet material bundle can be prevented from being shifted in the transport direction by the stopping unit, detection of each box-forming sheet material is possible. The position of the gap to be aligned is aligned substantially in a straight line in the direction orthogonal to the transport direction, and the gap interval can be detected more accurately by the interval detection means.

According to the configurations of the fifth aspect and the eleventh aspect, when the sheet material bundle is shifted and overlapped, the sheet material bundle is pressed in the horizontal direction with a tilting pressure plate inclined in advance. Since the sheet is pushed out from the upper box-forming sheet material one by one in order, the frictional resistance is small and it is possible to shift with little force, and a large force is locally applied to the edge of the box-making sheet material. It is possible to prevent the end portion from being crushed.
According to the configuration of the sixth aspect of the present invention and the thirteenth aspect of the present invention, whether or not a predetermined number of box-forming sheet materials are present in one sheet material bundle is checked by folding the box-forming sheet material. It becomes possible to carry out simultaneously with the inspection of accuracy.
According to the configuration of the present invention, since it is possible to inspect the folding accuracy of a plurality of box-making sheet materials by only taking one image, the stop time at the stop position is shortened. The folding accuracy of the box-making sheet material can be inspected at high speed.
According to the configuration of the thirteenth aspect, it is not necessary to determine the gap side edge of the flap, so that the image processing speed is improved, and in the unlikely event, the gap side edge is crushed or deformed, or the paper fiber protrudes. It is possible to prevent erroneous detection even when the above occurs.

The perspective explanatory view of the sheet material for box making which is the inspection object of the present invention. The schematic explanatory drawing of the test | inspection procedure of this invention. The side view of the installation state of the box making inspection apparatus which is one Embodiment of this invention. The top view of the installation state of the box making inspection apparatus which is one Embodiment of this invention. The front view of the carrying-in station seen from the carrying-in side of the installation state of the box making inspection apparatus which is one Embodiment of this invention. The rear view of the inspection station seen from the carrying-out side of the installation state of the box making inspection device which is one embodiment of the present invention. Operation | movement explanatory drawing seen from the carrying-in side of the 1st inspection station of the box making inspection apparatus which is one Embodiment of this invention.

The inspection procedure of the box making inspection method and the box making inspection apparatus of the present invention will be schematically described based on the schematic explanatory diagram shown in FIG.
The entire equipment to which the box making inspection method and the box making inspection apparatus of the present invention are applied is such that the box making sheet material 10 is folded at a necessary portion by the box making means as shown in FIG. It is manufactured to be bonded to the side plate 42 to form a joint portion, and a plurality of the sheet-making sheet materials 10 are stacked by an appropriate means to form a sheet material bundle, and subsequent handling such as transportation and inspection is performed on the sheet material. Configured to be processed in batches for each bundle.

First, as shown in FIG. 2A, the sheet material bundle 50 is conveyed to the inspection position of the first inspection station 130 where the first tilting means 140 and the interval detecting means 120 are arranged.
The conveyance of the sheet material bundle 50 is temporarily stopped at the inspection position of the first inspection station 130, and as shown in FIG. 2B, the sheet material bundle 50 is moved up and down by the first tilting means 140. The materials 10 are shifted so as to have a predetermined distance in a predetermined direction parallel to the sheet surface.
At this time, the tilting means 140 can be shifted by inclining in a state where the tilting means 140 is in contact with the end portion of the sheet material bundle 50. In this case, all the box-making sheet materials 10 of the sheet material bundle 50 are simultaneously removed. It is necessary to generate a large force in order to move in the horizontal direction at different speeds, and a large force is locally applied to the end of the box-making sheet material 10, which may cause damage such as crushing.
Therefore, it is preferable that the tilting means 140 is inclined in advance at a position away from the end portion of the sheet material bundle 50 and moved in the horizontal direction in the inclined state to press the end portion of the sheet material bundle 50.
As a result, it is possible to shift the sheet material bundle so as to extrude one sheet at a time from the uppermost box-forming sheet material, and locally at the end of the box-forming sheet material 10 without generating a large force. There is no great force applied to.

In the first inspection station 130, an interval detection unit 120 including a first illumination unit 123, a first imaging unit 121, and an image processing unit 122 that controls them and processes information is arranged.
The first illuminating means from the sheet surface side with respect to the gap of the flaps connected to the side plates in the joint portions of all the box-making sheet materials 10 of the sheet material bundle 50 that are shifted and overlapped by the interval detecting means 120. 123, the necessary illumination is performed, the planar image is captured by the first imaging unit 121, and the image data is processed by the image processing unit 122 to detect the gap interval. Inspection is performed.
When returning the sheet material bundle 50 to the state in which there is no deviation by the tilting means 140, even if the tilting means 140 operates in a state where the sheet material bundle 50 is in contact with the end of the sheet material bundle 50, the upward component force is maintained. Since it works, the frictional resistance between the box-making sheet materials 10 is small.
For this reason, it is possible to move all the box-making sheet materials 10 of the sheet material bundle 50 at the same time in the horizontal direction at different speeds without generating a large force, and locally at the end of the box-making sheet material 10. There is no significant power.

The sheet material bundle 50 picked up by the first image pickup means 121 is returned to the overlap without any deviation again by the first tilting means 140 and conveyed from the first inspection station 130 to the second inspection station 230. The
In the second inspection station 230, as shown in FIG. 2 (c), the second tilting means 240 shifts the sheet material bundle 50 in the direction opposite to that of the first inspection station 130, and the flap on the opposite side. Necessary illumination is performed from the sheet surface side by the second illumination unit 223, and a second image is captured as a planar image by the second imaging unit 221, and the image data is processed by the image processing unit 122 so that the gap interval is obtained. By detecting this, the folding accuracy of the box-making sheet material 10 is inspected.
The sheet material bundle 50 picked up by the second image pickup means 221 is returned again to the overlap without any deviation by the second tilting means 240 and conveyed to the next appropriate process.
In this way, the box-forming sheet is detected at high speed and accurately by detecting the gap gap between the flaps on both sides of the joint parts of the plurality of box-making sheet materials 10 simultaneously in the state of the stacked sheet material bundle 50. The bending accuracy of the material 10 can be inspected.

The direction in which the sheet material bundle 50 is shifted depends on the conveyance direction of the box-making sheet material 10 and the arrangement of the tilting means 140 and 240, but the flaps of the box-making sheet material 10 are conveyed to positions on both sides in the conveyance direction. It is preferable that the sheet material bundle 50 is shifted in a direction orthogonal to the conveyance direction by being pressed from both sides in the conveyance direction by the tilting means 140 and 240.
As a result, the position of the gap to be detected is located on both sides of the transport line, so that the interval detection means 120 can be arranged at a position where there is little interference with the transport equipment, and the detection accuracy by the spacing detection means 120 is improved. A drop due to the influence of vibration or the like is prevented, maintenance is facilitated, and the folding accuracy of the box-making sheet material 10 can be inspected more accurately.
When the sheet material bundle 50 before the box making inspection is transported with the flaps positioned forward and backward, a means for horizontally rotating the sheet material bundle 50 by 90 ° may be provided immediately before the box making inspection.

In the above-described example, the gaps 11 and 12 of the box-making sheet material 10 shown in FIG. 1 are stacked so that images can be taken from below (that is, the box-making sheet material 10 shown in FIG. 1 is turned upside down). Although the example which has arrange | positioned means 121,221 and the illumination means 123,223 was shown below, of course, it piles up so that the gaps 11 and 12 of the sheet | seat material 10 for box making may be imaged from upper direction, and the imaging means 121 221 and the illumination means 123 and 223 may be disposed above.
A mechanism for moving the imaging means 121, 221 and the illumination means 123, 223 is necessary to cope with the inspection of the box-making sheet material 10 having various specifications. It is preferable to be configured to take an image from

Further, in the above-described example, the gap gap between the flaps on both sides is detected at two locations of the first inspection station 130 and the second inspection station 230, but only one side of the first inspection station 130 is used. The folding gap of the box-making sheet material 10 may be inspected by detecting the gap interval of the flaps, and the imaging means 121, 221 and the illumination means 123, 223 are arranged on both sides of the first inspection station 130. The sheet material bundle 50 may be shifted to the opposite side by the first tilting means 140.
Since the increase in the residence time at one location is a factor that hinders the speeding up of the inspection process, it is preferable to have two locations as in the above example.

The position where the image processing means 122 processes the image data and detects the gap interval is preferably a position as far as possible from the end face so as not to be affected by the crushing or deformation of the end face of the box-making sheet material 10, The amount by which the sheet material bundle 50 is displaced by the tilting means 140 and 240 is preferably 5 mm or more between the upper and lower box-making sheet materials 10.
The calculation algorithm of the image processing unit 122 and the process when a defect is detected can be appropriately designed by a known technique as necessary.
In addition, the tilting means 140 and 240 and the conveyance devices may be controlled by a known control device including synchronization with the inspection by the interval detection means 120, and the tilting means 140 and 240 disposed in the inspection stations 130 and 230 are used. Alternatively, the image processing unit 122 may perform control of the conveying devices.

Further, in the above-described example, the gap gap interval detection by the interval detection unit 120 is performed by processing the two-dimensional images captured by the imaging units 121 and 221. As processing contents, processing of density information is performed. Alternatively, known image processing techniques such as color information processing can be applied.
In addition, the detection of the gap gap of the flap by the interval detection means 120 is performed instead of the one that collects a two-dimensional image at a time, and the imaging range is scanned at high speed using the illumination means 123 and 223 as point light sources such as lasers. 121 and 221 may be obtained in a time series to obtain reflection intensity and reflection position, and the time series data obtained by the image processing means 122 may be processed.
Furthermore, non-contact type detection means using infrared rays, ultrasonic waves, electromagnetic waves, fluid pressure, etc., and contact type detection means using probes, etc. are adopted, and the detection signal can be used as image information etc. directly from the detection value. As long as it is possible to detect the gap interval indirectly by converting to the process, the interval detection unit 120 may be anything.
Further, the gap interval may be detected by determining the gap-side edge of the flap, or may be calculated by determining the interval between marks provided by printing or the like on each surface of the flap.
In addition, since it is easy to detect the number of box-making sheet materials 10 stacked on the sheet material bundle 50 from the information obtained by the image processing unit 122, a predetermined number of sheets are produced on one sheet material bundle 50. Whether or not the box sheet material 10 is present may be detected at the same time.

Below, the specific structure and operation | movement of the box making inspection apparatus 100 which is one Embodiment of this invention are demonstrated based on drawing.
A box making inspection apparatus 100 according to an embodiment of the present invention includes a carry-in station 110, a first inspection station 130, and a second inspection station 230, and is shown in a side view and a plan view of the installed state in FIGS. In this way, the carry-in station 110, the first inspection station 130, and the second inspection station 230 are arranged so as to be connected in order from the right in the figure where the sheet material bundle 50 is carried in.

As shown in FIGS. 3 to 5, the carry-in station 110 is provided with a roller conveyor 111 that forms a conveyance path for conveying the sheet material bundle 50. Alignment means 113 for aligning the bundle 50 is provided, and a front stopper means 160 that can be advanced and retracted from below toward the conveyance path is provided at the end of the conveyance path on the first inspection station 130 side.
The roller conveyor 111 is driven by a roller driving belt 112 provided below the roller conveyor 111. In the present embodiment, the roller drive belt 112 is divided into two in the transport direction, and can be driven and stopped independently of each other.
The alignment means 113 includes a pair of alignment plates 114 that press the sheet material bundle 50 from the width direction, and an upper presser roller 117 that presses the sheet material bundle 50 from above.
The aligning plate 114 is attached to the aligning plate pressing means 116 that reciprocates by fluid pressure and reciprocates for a predetermined stroke. The aligning plate pressing means 116 is an aligning plate moving means 115 comprising mechanical reciprocating means such as a ball screw. Thus, it can be moved and positioned at an arbitrary position in the width direction according to the size of the box-making sheet material 10.

The alignment plate 114 shown by the solid line in FIG. 4 and FIG. 5 is the state in which the interval is narrowed by the alignment plate moving means 115 and pressed by the alignment plate pressing means 116 in this embodiment, that is, the minimum size in the width direction that can be accommodated. The alignment plate 114a indicated by a one-dot chain line indicates a state in which the alignment plate 114 is retracted to the outside in the width direction by the alignment plate pressing means 116.
Further, the alignment plate 114b shown by the one-dot chain line in FIG. 5 shows a state where the alignment plate moving means 115 widens the distance and is pressed by the alignment plate pressing means 116, and the alignment plate 114c shown by the one-dot chain line shows the state at that time. A state in which the alignment plate 114b is retracted to the outside in the width direction by the alignment plate pressing means 116, that is, a state in which the alignment plate 114b is matched with the maximum size in the width direction that can be handled.

The upper presser roller 117 is attached to the upper presser roller lifting / lowering means 118 so as to be lifted / lowered. The upper presser roller lifting / lowering means 118 can be moved / positioned to an arbitrary position in the conveying direction according to the size of the box-making sheet material 10 by an upper presser roller moving means 119 comprising a mechanical reciprocating means such as a ball screw. It is configured.
The upper presser roller 117 shown by the solid line in FIG. 3 shows a state where the upper presser roller lifting / lowering means 118 is raised by the upper presser roller 118 in this embodiment, that is, a state where the upper presser roller 117 is adjusted to the maximum sheet material bundle 50 that can be handled. The upper presser roller 117b indicated by a dotted line indicates a state where the upper presser roller lifting / lowering means 118 is lowered to the lowest level in the present embodiment, that is, a state where the upper presser roller 117b is matched with the sheet material bundle 50 having the minimum height that can be handled.

  As shown in FIGS. 3, 4, 6, and 7, the first inspection station 130 and the second inspection station 230 have central conveyance conveyors 131, 231, and 2 that form a conveyance path for conveying the sheet material bundle 50. Two side conveyors 132 and 232 are provided, and on the side of the conveyance path are provided tilting means 140 and 240 that make the overlapped sheet material bundle 50 shifted, and carried in above the conveyance path. Stop means 150 and 250 for aligning the sheet material bundle 50 in the conveyance direction are provided, and imaging units 124 and 224 for detecting the gap interval of the box-making sheet material 10 from the sheet surface side are provided below the conveyance path. It has been.

The central transfer conveyors 131 and 231 and the two side transfer conveyors 132 and 232 are configured to be able to be driven and stopped in synchronization.
Further, the two side conveyors 132 and 232 can be moved and positioned at arbitrary positions in the width direction by the side conveyor width direction moving means 135 and 235 in accordance with the width direction size of the sheet material 10 for box making. It is configured.
The tilting means 140 and 240 include tilting pressing plates 141 and 241 provided on one side, alignment receiving plates 133 and 233, and tilting receiving plates 144 and 244 provided on the other side.
The tilting press plates 141 and 241 are configured to be tiltable by tilting press plate tilting means 143 and 243, and the tilting press plate tilting means 143 and 243 are tilting press plate widths composed of mechanical reciprocating means such as a ball screw. The direction moving means 142 and 242 are configured to be able to move / position to an arbitrary position in the width direction according to the width direction size of the box-making sheet material 10.

The alignment receiving plates 133 and 233 are arbitrarily arranged in the width direction according to the width direction size of the box-making sheet material 10 by the alignment receiving plate width direction moving means 134 and 234 including mechanical reciprocating means such as ball screws. It is configured to be able to move and position to a position.
Further, the tilting pressing plate width direction moving means 142 and 242 and the alignment receiving plate width direction moving means 134 and 234 are manufactured by tilting pressing plate transport direction moving means 147 and 247 including mechanical reciprocating means such as ball screws. The box sheet material 10 is configured to be movable / positionable at an arbitrary position in the conveyance direction according to the conveyance direction size of the box sheet material 10.

The tilt receiving plates 144 and 244 are configured to be tiltable by tilt receiving plate tilting means 146 and 246, and the tilt receiving plate tilting means 146 and 246 are tilt receiving plate widths composed of mechanical reciprocating means such as a ball screw. By the direction moving means 145 and 245, it is comprised so that a movement and positioning to the arbitrary positions of the width direction are possible according to the width direction size of the box material 10 for box making.
Further, the tilt receiving plate width direction moving means 145 and 245 are adapted to the size of the box making sheet material 10 in the conveying direction by the tilt receiving plate conveying direction moving means 148 and 248 comprising mechanical reciprocating means such as ball screws. Thus, it can be moved and positioned at any position in the transport direction.

The stop means 150, 250 is composed of front stop means 151, 251 and rear press means 154, 254 provided before and after in the transport direction.
The front stop means 151 and 251 are configured by front stop plates 151 and 251 and front stop plate lifting and lowering means 153 and 253 for raising and lowering the front stop plates 151 and 251, and provided at the end of the transport path in the transport direction. The front stop plates 151 and 251 come into contact with the end surfaces of the sheet material bundle 50 at the lowered position, and the sheet material bundle 50 can pass at the raised position.

The rear pressing means 154 and 254 reciprocally move the rear pressing plates 155 and 255, the rear pressing plate lifting and lowering means 156 and 256 for raising and lowering the rear pressing plates 155 and 255, and the rear pressing plate lifting and lowering means 156 and 256 in the transport direction. The rear presser plate conveying direction moving means 157 and 257 are configured such that the rear presser plates 155 and 255 come into contact with the end surface of the sheet material bundle 50 at the lowered position and the sheet material bundle 50 can pass at the raised position. Has been.
Further, the front stopping means 151, 251 and the rear pressing means 154, 254 are provided as a pair on the left and right in the width direction, respectively, and the pair of front stopping means 151, 251 and the rear pressing means 154, 254 are in the width direction. The moving means 158 and 258 are configured to be movable / positionable to an arbitrary position in the width direction according to the width direction size of the box-making sheet material 10.

  Note that the rear presser plates 155 and 255 shown by the solid lines in FIG. 3 are in a state of being positioned farthest upstream in the transport direction by the rear presser plate transport direction moving means 157 and 257 in this embodiment, that is, the maximum size in the transport direction that can be handled. The rear presser plates 155b and 255b indicated by the one-dot chain lines are in a state positioned most downstream from the downstream in the transport direction by the rear presser plate transport direction moving means 157 and 257, that is, corresponding transport. The state according to the sheet material 10 for box making of the direction minimum size is shown.

The imaging units 124 and 224 accommodate the imaging units 121 and 221 and the illumination units 123 and 223. The box-making sheet material 10 is formed by the imaging unit transport direction moving units 125 and 225 and the imaging unit width direction moving units 126 and 226. In accordance with the size of the gap, it can be moved and positioned to an arbitrary position in accordance with the position of the gap.
Note that the imaging units 124 and 224 indicated by the solid lines in FIG. 3 indicate a state of being positioned most downstream from the downstream in the transport direction by the imaging unit transport direction moving means 125 and 225 in the present embodiment. Reference numeral 224b indicates a state in which the image pickup unit transport direction moving means 125 and 225 is positioned most upstream in the transport direction.
The image processing unit 122 that processes the captured image may be a known information processing unit (not shown), and a known interval detection unit that can detect the gap interval is used instead of the imaging units 124 and 224. It may be arranged.
Each movable means in the carry-in station 110, the first inspection station 130, and the second inspection station 230 is controlled by a known control device.

Operation | movement of the box making inspection apparatus 100 which is one Embodiment of this invention comprised as mentioned above is demonstrated.
First, from the right direction shown in FIGS. 3 and 4, a sheet material bundle 50 in which a plurality of sheet-making sheet materials 10 are stacked is transferred onto a roller conveyor 111 of the carry-in station 110 from an upstream conveying means (not shown).
At this time, the roller conveyor 111 is driven by the roller driving belt 112 so as to be substantially equal to the conveying speed of the upstream conveying means (not shown).
Further, the alignment plate 114 is positioned by the alignment plate moving means 115 so that the distance between the alignment plates 114 is wider than the width of the box-making sheet material 10 in a state where the alignment plate 114 is retracted to the outside in the width direction by the alignment plate pressing means 116. The front stopper means 160 is fixed at a position where it can advance from below toward the conveyance path and come into contact with the sheet material bundle 50.

When the sheet material bundle 50 is transferred to a position where it comes into contact with the front stopper means 160 by the roller conveyor 111 of the carry-in station 110, the upper presser roller 117 is lowered by the upper presser roller lifting / lowering means 118 and is applied from above the sheet material bundle 50. At the same time, the roller drive belt 112 stops and the transfer by the roller conveyor 111 stops, and the alignment plate 114 abuts on both side surfaces of the sheet material bundle 50 by the alignment plate pressing means 116.
By this operation, the end face positions in the width direction of the respective box-making sheet materials 10 stacked on the sheet material bundle 50 are aligned.

Next, the front stopper means 160 retreats below the conveyance path, and the sheet material bundle 50 in which the transfer by the roller conveyor 111 is resumed and the end face positions are aligned, the adjacent roller driving belt 112 is rotated again and the roller conveyor 111 is rotated. While being driven and transferred to the first inspection station 130, the alignment plate 114 and the upper presser roller 117 perform the return operation to the initial position.
When the upper presser roller 117 contacts from above the sheet material bundle 50, the sheet material bundle 50 is compressed and deformed in the thickness direction as a whole. Although the upper pressing roller 117 is transferred while being in contact, the upper pressing roller 117 is configured to be rotatable so that the sheet material bundle 50 can be smoothly transferred.

Also, during this transfer, among the roller drive belts 112 divided into two in the transport direction, the drive speed of the roller drive belt 112a on the first inspection station 130 side is set to be higher than that of the other roller drive belt 112b. Even if the rear sheet material bundle 50 transferred to the carry-in station 110 is adjacent, the front sheet material bundle 50 transferred to the first inspection station 130 is accelerated and sent out, and the space between the two sheet material bundles 50 is increased. It is possible to provide an interval.
Using this interval, the front stopper means 160 can be advanced from below toward the conveyance path immediately after the front sheet material bundle 50 passes and before the rear sheet material bundle 50 arrives. A series of operations can be reliably cut out for each sheet material bundle 50.

The sheet material bundle 50 transferred from the carry-in station 110 to the first inspection station 130 is continuously conveyed by the central conveyance conveyor 131 and the two side conveyance conveyors 132.
At this time, the front stop plate 151 waits in the lowered position by the front stop plate lifting / lowering means 153, and the rear presser plate 155 waits in the raised position where the sheet material bundle 50 can pass by the rear presser plate lifting / lowering means 156.
Further, the rear presser plate lifting / lowering means 156 conveys the rear presser plate so that the rear presser plate 155 is positioned further rearward than the rear side end portion of the sheet material bundle 50 when the sheet member bundle 50 contacts the front stop plate 151. It is positioned by the direction moving means 157.
Note that the distance between the front stop plate 151 and the rear presser plate 155 on both sides is positioned by the width direction moving means 158 according to the width direction size of the box-making sheet material 10.

The tilting pressing plate 141 is tilted by the tilting pressing plate tilting means 143, and the sheet material 10 for box making of the sheet material bundle 50 to which the upper end portion of the tilting pressing plate 141 is conveyed by the tilting pressing plate width direction moving means 142. It stands by so that it may be located slightly outward from the end face (the position of the tilting pressing plate 141a indicated by the one-dot chain line in FIG. 7).
The tilt receiving plate 144 is set up vertically by the tilt receiving plate tilting means 146, and slightly tilted by the tilt receiving plate width direction moving means 145 from the end face of the box-forming sheet material 10 of the sheet material bundle 50 to be conveyed. Waiting outward, the alignment receiving plate 133 is waiting slightly outward from the end face of the sheet material 10 for box making of the sheet material bundle 50 to be conveyed by the alignment receiving plate width direction moving means 134. .

The positions of the tilting pressing plate 141, the tilting receiving plate 144, and the alignment receiving plate 133 in the transport direction are in the vicinity of the center of the sheet material bundle 50 in the transport direction when the sheet material bundle 50 contacts the front stop plate 151 and inspected. The tilting pressure plate conveying direction moving means 147 is positioned at a position where the power gap is not hidden by the tilting receiving plate 144.
The image pickup unit 124 is positioned by the image pickup unit transport direction moving means 125 and the image pickup unit width direction moving means 126 according to the position of the gap of the box-making sheet material 10.

When the sheet material bundle 50 is conveyed by the central conveyance conveyor 131 and the two side conveyance conveyors 132 and comes into contact with the front stop plate 151, the driving of the central conveyance conveyor 131 and the two side conveyance conveyors 132 is stopped.
At this position, the rear presser plate 155 is lowered by the rear presser plate lifting / lowering means 156 and is driven by the rear presser plate conveying direction moving means 157 so as to come into contact with the rear side end portion of the sheet material bundle 50. The end face positions in the conveying direction of the stacked box-making sheet materials 10 are aligned.
As a result, the transport direction positions of the gaps of the respective box-making sheet materials 10 stacked on the sheet material bundle 50 are also aligned.

  Then, the tilt receiving plate 144 is tilted to the same angle as the tilt pressing plate 141 by the tilt receiving plate tilting means 146 (state of the tilt pressing plate 144c shown by the solid line in FIG. 7), and the tilt pressing plate 141 is moved in the tilt pressing plate width direction. The sheet material bundle 50 is pushed into contact with the side end surfaces of the sheet material bundle 50 by the means 142 (to the position of the tilting pressure plate 141b shown by the solid line in FIG. 7), whereby the sheet material bundle 50 is moved up and down. Are overlapped in a state of having a predetermined distance in a predetermined direction parallel to the sheet surface.

By pressing the tilting pressing plate 141, the sheet material bundle 50 is shifted so as to be pushed out one by one from the uppermost box-forming sheet material 10, so that the frictional resistance is small and can be shifted with a small force. It is possible to prevent a large force from being locally applied to the end portion of the box sheet material 10 and to prevent the end portion from being crushed.
At this position, the illuminating means 123 and the imaging means 121 accommodated in the imaging unit 124 are operated, and the captured images are transferred to the image processing means 122 (not shown), and the plurality of box-making sheet materials 10 of the sheet material bundle 50 are transferred. The gap interval is detected at the same time.

It should be noted that processing such as identification of the box-making sheet material 10 that becomes a defective product based on the detected gap interval, recording of the information thereof, notification to a supervisor, and transmission of information to other devices, etc., are known information processing. After the sheet material bundle 50 including the box-making sheet material 10 which is performed by the means and includes the defective box-making sheet material is unloaded from the box-making inspection apparatus, the defective product is eliminated by an appropriate method and means.
Further, the information may be fed back to the box making means.

After the gap is imaged, the tilting pressure plate 141 is retracted to the original position by the tilting pressure plate width direction moving means 142, the tilting receiving plate 144 is returned to the vertical state by the tilting receiving plate tilting means 146, and the alignment receiving plate. 133 is brought into contact with the side end surface of the sheet material bundle 50 by the alignment receiving plate width direction moving means 134, so that the sheet material bundle 50 is overlapped with the upper and lower box-making sheet materials 10 aligned.
Then, the alignment receiving plate 133 is returned to the standby position slightly outward from the end face of the box-forming sheet material 10 of the sheet material bundle 50 to be conveyed by the alignment receiving plate width direction moving means 134 and the front stop plate 151. Is moved up by the front stop plate raising / lowering means 153 at the rising position where the sheet material bundle 50 can pass, and then the central conveyance conveyor 131 and the two side conveyance conveyors 132 are started to be adjacent to each other. Transport to the second inspection station 230.

  The second inspection station 230 has a configuration that is symmetrical in the width direction with the configuration of the first inspection station 130 described above, and the operation is also performed symmetrically with the first inspection station 130 described above. After detecting the gap interval existing in the flaps on the opposite side of the plurality of box-forming sheet materials 10 of the sheet-sheet bundle 50 detected at the first inspection station 130, the sheet material bundle 50 is moved to the upper and lower box-forming sheets. The material 10 is unloaded from the second inspection station 230 as an overlapping state (the details will be omitted if the reference number 100 is replaced with the number 200).

  In this way, in addition to specifying the box-making sheet material 10 that is a defective product by determining the gap gap error existing in the flaps on both sides, the relative dimensional difference in the gap gap on both sides Therefore, it is possible to specify a defective product depending on the size difference, and it is possible to specify the box-making sheet material 10 that becomes a defective product more accurately.

The box making inspection method and box making inspection apparatus of the present invention are suitable for inspecting the folding accuracy of a box making sheet material produced from a cardboard by box making means, but for making a box other than corrugated board. Applicable to sheet materials. Not limited to box-making sheet materials, but can be applied to any product inspection as long as rectangular sheet-shaped products are handled by stacking and inspecting the horizontal plane near the edges. It is.
In the above embodiment, the box making inspection apparatus 100 is configured as an apparatus that can be independently installed in the line, but is configured by incorporating a mechanism that performs the same operation in another apparatus in the production line. May be.

DESCRIPTION OF SYMBOLS 10 ... Sheet material for box making 11 ... Gap 12 ... Gap 13 ... Adhesive piece 21, 22, 23, 24
... Flaps 31, 32, 33, 34
・ ・ ・ Flap 41 ・ ・ ・ (One) side plate 42 ・ ・ ・ (Other) side plate 50 ・ ・ ・ Sheet material bundle 100 ・ ・ ・ Box making inspection device 110 ・ ・ ・ Loading station 111 ・ ・ ・ Roller conveyor 112 ... Roller drive belt 113 ... Alignment means 114 ... Alignment plate 115 ... Alignment plate moving means 116 ... Alignment plate pressing means 117 ... Upper presser roller 118 ... Upper presser roller lifting / lowering means 119 ... Upper presser roller moving means 120 ... Interval detection means 121, 221 ... Imaging means 122 ... Image processing means 123, 223 ... Illuminating means 124, 224 ... Imaging units 125, 225 ... Imaging unit transport direction moving means 126, 226 ... Imaging unit width direction moving means 130, 230 ... Inspection stations 131, 231 ..Central transfer conveyors 132, 232 ... Side transfer conveyors 133, 233 ... Alignment receiving plates 134, 234 ... Alignment receiving plate width direction moving means 135, 235 ... Side transfer conveyor width direction movement Means 140, 240 ... Tilt means 141, 241 ... Tilt press plate 142, 242 ... Tilt press plate width direction moving means 143, 243 ... Tilt press plate tilt means 144, 244 ... Tilt receiver Plates 145, 245 ... Tilt receiving plate width direction moving means 146, 246 ... Tilt receiving plate tilting means 147, 247 ... Tilt press plate conveying direction moving means 148, 248 ... Tilt receiving plate carrying direction movement Means 150, 250 ... Stop means 151, 251 ... Front stop means 152, 252 ... Front stop plates 153, 253 ... Front stop plate elevating means 154, 254 ... Backward push Means 155, 255 ... Back press plate 156, 256 ... Back press plate lifting / lowering means 157, 257 ... Back press plate conveying direction moving means 158, 258 ... Width direction moving means 160 ... Front stopper means

Claims (14)

The box making is performed by detecting the gap interval of the flaps connected to the side plates in the joint portion of the box making sheet material which is folded and fixed at the end by the interval detecting means, and inspecting the folding accuracy of the box making sheet material. An inspection method,
The sheet material for box making is conveyed to the inspection position as a bundle of sheet materials stacked in a plurality of sheets,
In the inspection position, the sheet material bundle is an overlapping overlap of the upper and lower box-forming sheet materials in a state having a predetermined distance in a predetermined direction parallel to the sheet surface,
The box making inspection method, wherein the gap detecting means detects from the sheet surface side the gap interval of all the box making sheet materials of the sheet material bundle that is shifted and overlapped. Two inspection positions are provided in the conveying direction of the sheet material bundle,
2. The box making inspection method according to claim 1, wherein the box making sheet material of the sheet material bundle is shifted in opposite directions at two inspection positions.   3. The box making inspection method according to claim 1, wherein the box making sheet material of the sheet material bundle is shifted in a direction orthogonal to the conveying direction at the inspection position. In the inspection position, the conveyance of the sheet material bundle is stopped by the stop means,
In a state where the conveyance of the sheet material bundle is stopped, it is assumed that the overlap is shifted,
After detection by the interval detection means, the shifted overlap is restored,
4. The box making inspection method according to claim 1, wherein the stop of the conveyance by the stopping means is released thereafter.   The box making inspection method according to any one of claims 1 to 4, wherein the end faces of the sheet material bundle are made to be shifted by pressing in a horizontal direction with a tilting pressing plate inclined in advance. .   6. The box making inspection method according to claim 1, wherein the interval detecting unit detects the number of sheet members for box making of the sheet material bundle. Conveying means for conveying the box-making sheet material which is folded and fixed at the end, interval detecting means for detecting the gap interval of the flaps connected to the side plates in the joint part of the box-making sheet material, and the interval A box making inspection apparatus equipped with an inspection station for detection by a detection means,
The transport means is configured to transport an inspection station in a state of a bundle of sheet materials stacked in a plurality of sheets for the box making,
The inspection station is provided with tilting means for pressing the end surfaces of the sheet material bundle so that the upper and lower box-making sheet materials overlap each other with a predetermined distance in a predetermined direction parallel to the sheet surface. And
The interval detection means is arranged at a position for detecting the gap interval from the sheet surface side of the sheet material bundle that is shifted and overlapped at the inspection station,
A box making inspection apparatus for inspecting the folding accuracy of the box making sheet material. The inspection station is provided in two places in the conveying direction of the sheet material bundle,
8. The box making inspection apparatus according to claim 7, wherein the respective tilting means arranged at the two inspection stations shift the end faces of the sheet material bundle in opposite directions.   9. The box making inspection apparatus according to claim 7, wherein the tilting means of the inspection station shifts the end face of the sheet material bundle in a direction orthogonal to the conveying direction.   The box making inspection apparatus according to any one of claims 7 to 9, wherein the inspection station includes a stopping unit that temporarily stops the conveyed sheet material bundle.   The tilting means includes a tilting pressure plate that can be tilted, and a tilting pressure plate pressing means that reciprocates the tilting pressure plate in the horizontal direction to press the end face of the sheet material bundle. Item 11. A box making inspection device according to any one of Items 10.   The interval detection unit includes an imaging unit that captures a two-dimensional image, and an image processing unit that processes the captured two-dimensional image and calculates the gap intervals of all the box-making sheet materials in one sheet material bundle. The box making inspection device according to claim 7, wherein the box making inspection device is provided.   13. The box making inspection apparatus according to claim 12, wherein the image processing means calculates the gap interval from the interval of marks attached to the flaps connected to the side plates on both sides of the joint portion.   The box making inspection apparatus according to any one of claims 7 to 13, wherein the interval detecting means has sheet number detecting means for detecting the number of sheet material for box making of a sheet material bundle.

Images