JP6887172B2 - Flat board punching device - Google Patents

Description

The present invention relates to a flat plate punching device for punching a product sheet such as a carton blank from a flat plate-like member such as a corrugated cardboard sheet, cardboard, or a film, and more particularly to a flat plate punching device including an inspection unit for photographing and inspecting the product sheet. ..

Conventionally, in a flat board punching device that punches a punched material such as a corrugated cardboard sheet for which a printing process has been completed, a defect due to the printing process and a defect due to the punching process are inspected in the flat board punching device for inspection. Efforts are being made to improve the efficiency of the corrugated cardboard and reduce the equipment cost and installation space for installing a separate inspection device. (See Patent Documents 1 to 3).

When the punched material is photographed with an inspection camera in the flat plate punching device, the punched material transported by supporting the gripper margin swings up and down, so how to overcome the vertical movement of the punched material and the camera. The question is whether to focus on.

Therefore, Patent Document 1 proposes a method of photographing a carton blank while suppressing the vertical movement of the carton blank by pressing the carton blank (stamped material) from above and below by a roll or a conveyor.
Further, Patent Document 2 proposes a flat plate punching method in which the imaging mechanism of the inspection mechanism is moved in response to the vertical movement of the carton blank, and the inspection is performed while keeping the distance of the carton blank from the inspection surface substantially constant. ing.

However, in the method according to Patent Document 1, the gripper bar that pulls the carton sheet with the hooking needle passes between the rollers that press the carton sheet from above and below, but this gripper bar is thicker than the carton sheet. , It is necessary to widen or narrow the distance between rollers and the like. Therefore, in the method according to Patent Document 1, the upper roller is moved up and down by an actuator, but since the vertical movement of the roller causes vertical vibration to the carton seat, the side close to the gripper bar of the carton seat is inspected. It is difficult to accurately focus the camera.

Further, the method according to Patent Document 2 requires a displacement sensor for measuring the vertical movement of the carton blank in real time, an interval adjusting means for adjusting the distance between the photographing mechanism and the carton blank, etc., although the product sheet is not pressed. Therefore, there is a problem that the device is complicated and expensive, and a time lag occurs between measuring the vertical movement of the carton blank and adjusting the distance between the imaging mechanism and the carton blank by the interval adjusting means, which makes the inspection inaccurate. There is a problem.

Therefore, Patent Document 3 proposes a flat plate punching device configured to take a picture while sucking the punched material upward by a suction conveyor. In the flat plate punching device of Patent Document 3, the negative pressure supply port of the suction conveyor is projected downward, and after the gripper bar passes through the negative pressure supply port, a picture is taken to obtain a punched member based on the thickness of the gripper bar. Vibration is suppressed.

Japanese Unexamined Patent Publication No. 2006-53080 Japanese Unexamined Patent Publication No. 2008-12778 Japanese Unexamined Patent Publication No. 2013-127412

However, in the flat plate punching device of Patent Document 3, since the inspection section is provided between the strip section and the knock-off section, the paper scraps scattered from the strip section and the knock-off section enter the field of view of the camera and cause false detection. There was a risk of waking up.
Further, in the case of multi-chopping in which a plurality of carton blanks are punched from one punched material, there is a problem that the image is blurred because the punched material undulates when passing through the inspection section.
In addition, since the upper side of the punched material is photographed in a free state before the punched material is supported by the suction conveyor, the punched material swings, and the image is also blurred, causing a false detection. there were.
The present invention has been made to solve such a problem, and an object of the present invention is to provide a flat plate punching device provided with an inspection unit capable of efficiently detecting defective products with few false detections.

The invention made to solve the above problems includes a press portion for pressing a predetermined mold on the punched material, a plurality of product sheets arranged in the width direction from the punched material conveyed from the press portion, and a gripper margin. A strip portion that removes non-product parts other than the gripper margin, a knock-off portion that separates the plurality of product sheets from the gripper margin of the punched material conveyed from the strip portion, and a press portion via the strip portion. A gripper bar that supports the gripper margin of the punched material to the knockoff portion and conveys the punched material, and a product sheet that is continuously provided on the downstream side of the knockoff portion and is conveyed from the knockoff portion are photographed and inspected. It is a flat plate punching device including an inspection unit to perform, and includes a defective product removing unit for discharging a defective product sheet among the product sheets conveyed from the knockoff unit, and the knockoff unit is separated from the gripper margin. After being transported to the downstream side
It is characterized in that it has a partition plate for partitioning the plurality of product sheets in the width direction, and the inspection unit is provided between the knockoff unit and the defective product removing unit.

In the flat plate punching device of the present invention, since the inspection section is provided on the downstream side of the knockoff section in the transport direction, not in the middle of the press section or strip section where paper scraps are likely to be generated, the paper scraps scattered on the inspection section are provided. Can be reduced to suppress false positives caused by paper scraps reflected in the inspection image.

The inspection unit sucks and conveys the product sheet separated from the gripper margin on the upper surface, and also conveys the first and second suction conveyors lined up at intervals in the conveying direction from the lower side of the interval. It is preferable to provide a camera for underside photography that photographs the underside of the product sheet.
In this way, by receiving the product sheet between the two suction conveyors arranged at intervals in the transport direction of the product sheet, it is possible to remove the paper scraps adhering to the product sheet. Further, since the product sheet is transported in a single state separated from the gripper bar, it is possible to suppress the vertical movement of the product sheet and take a picture of the product sheet.

The flat plate punching device of the present invention is provided above the interval so as to cross the first suction conveyor and the second suction conveyor, and includes a third suction conveyor that sucks and conveys the product sheet on the lower surface side. Is preferable.
By providing the third suction conveyor between the first suction conveyor and the second suction conveyor in this way, when the product sheet is passed from the first suction conveyor to the third suction conveyor, or from the third suction conveyor to the second suction. When the product sheet passes over the conveyor, the paper scraps adhering to the product sheet can be shaken off.
Further, when the product sheet is photographed from below, not only the end portion of the product sheet in the transport direction is sucked downward by the first and second suction conveyors, but also the intermediate portion of the product sheet in the transport direction is sucked by the third suction. The product sheet can be photographed with less vibration because it can be sucked upward by the conveyor.

Further, it is preferable that the inspection unit includes a camera for top surface photographing that takes a picture from above the product sheet while sucking the product sheet from below by the first or second suction conveyor. The vibration of the product sheet can be effectively suppressed by transporting only the product sheet that is separated from the gripper bar and becomes a single unit while sucking it downward with a suction conveyor. By taking a picture of the upper side of the product sheet from the information in this state, it is possible to take an image with less blur.

It is preferable that the knock-off portion is provided with guide members at both ends in the width direction for correcting the positional deviation of the product sheet separated from the gripper margin in a plan view.
By doing so, the product sheet can be suppressed from being displaced due to sliding or rotation in the width direction, so that the product sheet can be photographed more accurately.

It is preferable that the knock-off portion is provided with a brush portion that abuts on the upper surface of the rear end portion of the product sheet that is transported to the downstream side after being separated from the gripper margin to extend the warp of the product sheet. When the product sheet is curved or wavy in the vertical direction, the brush portion is brought into contact with the upper surface of the rear end portion of the product sheet transported to the downstream side, and the frictional force of the product sheet causes the product sheet. The rear end can be pulled backwards to smooth out the curvature and waviness of the product sheet and flatten the product sheet.

As described above, according to the flat plate punching device of the present invention, it is possible to suppress the influence of paper scraps and the vertical movement of the punched material, and perform an imaging inspection with few false positives.

It is a side view which showed the inside of the flat plate punching apparatus which concerns on one Embodiment of this invention see through. It is a side view which showed the inspection part shown in FIG. 1 enlarged. It is a top view which showed the knock-off part shown in FIG. 1 and the inside of the inspection part see through. It is a top view which saw through the inside of the knock-off part shown in FIG. It is explanatory drawing which shows the operation of the brush part of FIG. 4 from the side view.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. However, the present invention is not limited to the following embodiments.

FIG. 1 shows a flat plate punching device 1 according to the first embodiment of the present invention. As shown in FIG. 1, the flat board punching device 1 includes a feeder unit 2, a press unit 3, a strip unit 4, a knockoff unit 5, an inspection unit 6, a defective product removing unit 7, and a delivery unit 8. , The transport means 9 is provided. In FIG. 1, the right side shows the upstream side in the transport direction of the punched material A (hereinafter, simply referred to as “upstream side”), and the left side shows the downstream side in the transport direction (hereinafter, simply referred to as “downstream side”). Further, hereinafter, the transport direction of the punched material A is simply referred to as a “transport direction”.

As shown in FIG. 1, the feeder portion 2 is provided on the most upstream side of the flat plate punching device 1. The feeder portion 2 is configured to feed the punched material A stacked with the printed side facing down to the pressing portion 3 adjacent to the downstream side one by one from the lower side.

The transport means 9 includes a gripper bar 91 for holding the punched material A by piercing a hooking needle (not shown) into the gripper margin C of the punched material A, and an endless roller chain 92 having gripper bars 91 at predetermined intervals. , The rotary wheels 93 and 94 over which the roller chain 92 is laid are provided. The rotary wheels 93 and 94 intermittently rotationally drive the roller chain 92 along with the punching cycle of the press portion 3, and stop the punched material A for each portion of the press portion 3, the strip portion 4, and the knockoff portion 5. Transport while letting.

The press unit 3 has a press punching die 31 that presses a predetermined die on the punched material A, and the press punching die 31 provides a cut line in a state where a connection margin is slightly left on the punched material A. , The punched material A is configured to be divided into one or more product sheets B, a gripper margin C, and a non-product portion excluding the gripper margin C (not shown).

The strip portion 4 is provided on the downstream side adjacent to the press portion 3, and the punched material A pressed by the press portion 3 is conveyed. The strip portion 4 includes a stripping upper die 41 and a stripping lower die 42, and removes non-product parts other than the gripper margin C from the punched material A, leaving the product sheet B and the gripper margin C. It is configured.

The knockoff portion 5 is provided adjacent to the downstream side of the strip portion 4 as shown in FIG. As shown in FIG. 4, the knock-off portion 5 includes a knock-off hammer 51 and a knock-off table 52 provided at the downstream end, a brush device 53 provided at the upstream end, and a sheet receiver 54 in the width direction. Side guide portions 55 and 55 provided at both ends (in the vertical direction of FIG. 4), a partition plate 56 provided in the center in the width direction, and a floor plate 57 (see FIG. 5) are provided. The knock-off hammer 51 and the knock-off table 52 are configured to cooperate with each other to separate the product sheet B from the punched material A.

The brush device 53 includes a rotating shaft 531 spanned in the width direction of the knockoff portion 5 and a brush portion 532 whose base end side is cantilevered and supported by the rotating shaft 531. The brush portion 532 has a brush 532a composed of a large number of bristles arranged along the rotation shaft 531 and a folded metal plate 532b that is sandwiched so that the tip of the brush 532a is exposed. As shown in FIG. 5, the brush portion 532 rotates between a state in which the tip is lowered near the floor surface and a state in which the tip is extended substantially horizontally toward the downstream side.

As shown in FIGS. 4 and 5, the sheet receiver 54 has a long plate shape provided so as to be bridged in the width direction of the knockoff portion 5 just below the lowered tip of the brush portion 532. The sheet receiver 54 includes a floor plate 54b extending downstream from the floor plate storage portion 54a provided on the upstream side (right side in FIG. 5). When the brush portion 532 is lowered, the floor plate 54b extends to the downstream side, and the brush portion 532 and the floor plate 54b cooperate with each other to sandwich the rear end portion of the product sheet B which is separated from the gripper margin C and transported to the downstream side. It is configured as follows.
The brush device 53 and the sheet receiver 54 are configured to be slidable along the transport direction by the motor 58 and the screw shaft 59 according to the size of the product sheet B.

The side guide portion 55 includes a plurality of guide blocks (guide members) 552, 552, ... Sliding along the sliding shaft 551 and the sliding shaft 551, and the sliding shaft 551 in the width direction of the knockoff portion 5. It is mainly provided with a slide operation bar 553 for sliding to and a slide auxiliary shaft 554. The sliding shaft 551, the guide block 552, ... Are provided so as to dive under the seat receiver 54. The guide block 552 is made of a resin block, and when the brush device 53 and the sheet receiver 54 move to the downstream side, the guide block 552 is pushed by the sheet receiver 54 and slides along the sliding shaft 551 as shown in FIG. It is collected so as to close the space to the downstream end of the moving shaft 551.

As shown in FIG. 2, the inspection unit 6 has the first suction conveyor 61 and the second suction conveyor 62 arranged at intervals 66 in the transport direction (left-right direction in FIG. 2), and the first one above the interval 66. A third suction conveyor 63 provided so as to cross the suction conveyor 61 and the second suction conveyor 62, a bottom surface photographing camera 64 for photographing the product sheet B from the lower side, and a top surface photographing for photographing the product sheet B from the upper side. It is equipped with a camera 65 and LED lights 69 and 69 that illuminate the product sheet from the lower side and the upper side, respectively.

As shown in FIG. 3, each suction conveyor 61, 62, 63 has suction belts 67, 67, ... In which a plurality of suction belts are arranged in parallel in the width direction, and suctions for supplying negative pressure for sucking the product sheet B. It has a box 68 (see FIG. 2). The suction box 68 is sucked by an air pump (not shown) to form a negative pressure inside. The suction belts 67, 67, ... Are provided with a large number of negative pressure supply holes 67a in a circumferential shape. A negative pressure supply slit 68a extending in the transport direction is provided above or below the suction box 68, and the suction belt 67 applies the negative pressure supplied from the negative pressure supply slit 68a to the negative pressure supply hole 67a. Is supplied to the product sheet B via. The first and second suction conveyors 61 and 62 are provided with a negative pressure supply slit 68a on the upper side, and are configured to suck the product sheet downward on the upper surface, and the third suction conveyor 63 has a negative pressure supply slit 68a on the lower side. It is provided on the side and is provided so as to suck the product sheet B upward on the lower surface.
The third suction conveyor 63 is provided so as to move up and down according to the thickness of the passing product sheet B.

As shown in FIG. 2, the bottom surface photographing camera 64 directly presses the lower surface of the product sheet B passing above the gap 66 while being sucked upward by the third suction conveyor 63, or a mirror or the like. It is configured to shoot indirectly through.

The top surface photographing camera 65 passes through the third suction conveyor 63 and then conveys the upper surface of the product sheet B while being sucked downward by the second suction conveyor 62 from the downstream end of the third suction conveyor 63. It is configured to shoot directly or indirectly from above, slightly behind.

The inspection unit 6 determines whether the product sheet B is good or bad based on the information regarding the state of the product sheet B sent from the bottom surface photographing camera 64 and the top surface photographing camera 65, and the defective product removing unit 7 described later is not suitable. It is equipped with a control unit (not shown) that instructs to remove non-defective products.

As shown in FIG. 1, the defective product removing unit 7 is provided on the downstream side adjacent to the inspection unit 6. The defective product removing unit 7 moves downward from between the fourth suction conveyor 71, which conveys the product sheet B while sucking it upward, and the adjacent suction belt conveyor (not shown) of the fourth suction conveyor 71. It is provided with a push-down means 72 for pushing down a defective product sheet and a defective product carry-out conveyor 73 for receiving the defective product sheet pushed down by the push-down means 72 and carrying it out in a direction perpendicular to the transport direction of the product sheet B. There is.

As shown in FIG. 1, the delivery unit 8 is continuously provided on the downstream side of the defective product removing unit 7. The delivery unit 8 lowers the fifth suction conveyor 81, which is determined to be a non-defective product and conveys the product sheet B which has been transported without being removed by the defective product removing unit 7, while sucking it upward, and the non-defective product sheet B downward. An elevating conveyor 84 that receives and accommodates a non-defective product sheet B that is pushed down by the pushing-down means 82, and an unloading unit 83 that moves in and out between the fifth suction conveyor 81 and the elevating conveyor 84. It is equipped with a carry-out conveyor 85 for carrying out a non-defective product sheet B. The elevating conveyor 84 is provided so as to move up and down between a higher position for receiving the non-defective product sheet pushed down by the push-down means 82 and a lower position for delivering the stacked product sheets to the carry-out conveyor 85. The unloading unit 83 temporarily receives the non-defective product sheet B pushed down by the push-down means 82 until the elevating conveyor 84 descends to the lower position and returns to the upper position.

Next, a procedure for punching the product sheet B from the punched material A using the flat plate punching device 1 of the present embodiment and inspecting the product sheet B will be described.
First, as shown in FIG. 1, the punched material A is laminated and set in the feeder portion 2. The punched material A set in the feeder portion 2 is conveyed downstream one by one from the lower side, and the gripper margin C is supported by the gripper bar 91 at the entrance of the press portion 3.

The punched material A supported by the gripper bar 91 is intermittently conveyed by the conveying means 9 so as to stop at each of the press portion 3, the strip portion 4, and the knockoff portion 5. The punched material A is pressed with a cut line having a predetermined shape in the press portion 3, and non-product portions other than the gripper margin C are removed in the strip portion 4.

The punched material A conveyed from the strip portion 4 to the knockoff portion 5 descends at the timing when the gripper margin C supported by the gripper bar 91 passes between the knockoff hammer 51 and the knockoff table 52 in the vertical direction. The product sheet B is pushed down by the hammer 51 and separated from the gripper margin C. The gripper margin C separated from the product sheet B is collected by the gripper margin collecting unit 10 provided above the knockoff unit 5.

In the product sheet B that has been pushed down, the end portion on the downstream side in the transport direction is received by the upstream end portion of the first suction conveyor 61, and the end portion on the upstream side in the transport direction is received by the sheet receiver 54. At this timing, the brush portion 532 rotates around the rotation shaft 531 and descends, and at the same time, cooperates with the floor plate 54b that has advanced to the downstream side from the floor plate storage portion 54a to sandwich the rear end of the product sheet B. To do. As a result, as shown in FIG. 5, the bending of the product sheet B is corrected, and the product sheet B is prevented from being conveyed to the next inspection unit 6 earlier than a predetermined timing.

The product sheet B pushed down by the knock-off hammer 51 is guided at both ends in the width direction by the guide blocks 552, 552, ... Of the pair of side guide portions 55, 55, and is displaced in the width direction and the rotation direction in a plan view. Will be corrected. FIG. 4 shows an example of punching two product sheets B and B arranged in the width direction from the punched material A with a two-dot chain line. In this case, the end portion on the center side in the width direction of the product sheet B is shown. Is guided by the partition plate 56.

As shown in FIG. 2, the product sheet B whose bending, horizontal misalignment, and transfer timing have been corrected by the knock-off section 5 is sucked to the inspection section 6 by the first suction conveyor while being sucked on the lower surface. Be transported. When the product sheet B reaches the third suction conveyor 63, it is conveyed while being sandwiched between the first suction conveyor 61 and / or the second suction conveyor 62 and the third suction conveyor 63, and during this time, the bottom surface photographing camera 64 Photographs the bottom surface with printing. The upper surface of the portion of the product sheet B that has passed through the third suction conveyor 63 is photographed by the top surface photographing camera 65.

As described above, in the flat plate punching device 1 of the present invention, the rear end portion of the product sheet B is sandwiched between the brush portion 532 and the underlay 532, so that the product sheet B is bent and the transfer timing (positional deviation in the transfer direction). ) Is corrected, and the side guide portion 55 corrects the rotational deviation of the product sheet B in the width direction and in the horizontal plane, and conveys the product sheet B to the inspection unit 6 in a more correct posture, so that the product becomes clearer. Sheet B can be photographed.

Further, in the flat plate punching device 1 of the present invention, the inspection unit 6 is provided on the downstream side of the knockoff unit 5, and the product sheet B is separated from the gripper bar 91C, and the first and second inspection units 6 are separated from the gripper bar 91C. Since the passage is made to pass between the suction conveyors 61 and 62 and the third suction conveyor 63, the vertical movement of the product sheet B due to the thickness of the gripper bar 91 can be eliminated, and the product sheet B is also clearly photographed. be able to.

Further, since the inspection unit 6 is provided on the downstream side of the knock-off unit 5, the inspection unit 6 is far from the press unit 3 and the strip unit 4, so that the waste paper generated in the press unit 3 and the strip unit 4 becomes the inspection unit. Scattering can be suppressed.

Further, in the inspection unit 6, since the product sheet B is delivered from the first suction conveyor 61 to the second suction conveyor 62 through the gap 66, the paper scraps adhering to the product sheet b at the time of this delivery are wiped off. be able to. In addition, the inspection unit 6 has a third suction conveyor 63, and by passing the product sheet B from the first suction conveyor 61 to the third suction conveyor 63, the third suction conveyor 63 to the second suction conveyor 63 can also be transferred. Paper scraps can also be removed from the product sheet B by handing it over to 62. In this way, by suppressing the scattering of the paper scraps and the adhesion to the product sheet B, it is possible to suppress the erroneous determination due to the paper scraps being reflected in the captured image.

When the product sheet B that has been subjected to the photographing inspection and is conveyed to the defective product removing unit 7 is determined to be defective, it is pushed downward by the pushing-down means 72, and is received by the defective product carry-out conveyor 73 and discharged. Of the product sheets B transported to the defective product removing unit 7, the product sheet B determined to be a non-defective product is delivered to the fifth suction conveyor 81 of the downstream delivery unit 8. The non-defective product sheet B conveyed to directly above the elevating conveyor 84 by the fifth suction conveyor 81 is pushed down by the push-down means 82 and received by the elevating conveyor 84. When a predetermined number of product sheets are laminated on the elevating conveyor 84, the elevating conveyor 84 descends and delivers the product sheets B in a state of being laminated on the unloading conveyor 85.

The flat plate punching device of the present invention is not limited to the above-described embodiment, and for example, a third suction conveyor may not be provided. Further, the upper surface of the product sheet may be photographed on the upstream side of the third suction conveyor. Brush devices, underlays, side guides, and dividers do not have to be provided.

As described above, the flat plate punching device of the present invention can effectively suppress the vertical movement of the punched material, the misalignment in the plan view, and the scattering of paper scraps, so that the product sheet can be photographed more clearly. It can be suitably used for manufacturing a carton blank or the like in which even minute scratches are not allowed.

1 Flat board punching device 3 Press part 4 Strip part 5 Knock-off part 532 Brush part 55 Guide member 6 Inspection part 61 1st suction conveyor 62 2nd suction conveyor 63 3rd suction conveyor 64 Bottom shooting camera 65 Top shooting camera 66 Interval 91 gripper bar

Claims (6)

A press part that presses a predetermined mold on the punched material,
A strip portion for removing non-product parts other than the gripper margin, leaving a plurality of product sheets and gripper margins arranged in the width direction from the punched material conveyed from the press portion
A knock-off portion that separates the plurality of product sheets from the gripper margin of the punched material conveyed from the strip portion, and a knock-off portion.
A gripper bar that supports the gripper margin of the punched material and conveys the punched material from the press portion through the strip portion to the knockoff portion.
A flat board punching device provided continuously on the downstream side of the knock-off portion and provided with an inspection portion for performing a photographing inspection of a product sheet conveyed from the knock-off portion.
Among the product sheets conveyed from the knock-off unit, a defective product removing unit for discharging a defective product sheet is provided.
The knock-off portion is separated from the gripper margin and then transported to the downstream side.
It has a partition plate that partitions the plurality of product sheets in the width direction.
The inspection unit is a flat plate punching device provided between the knock-off unit and the defective product removing unit. The inspection unit sucks and conveys the product sheet separated from the gripper margin on the upper surface, and also conveys the first and second suction conveyors lined up at intervals in the conveying direction from the lower side of the interval. The flat plate punching device according to claim 1, further comprising a camera for underside photography that photographs the underside of the product sheet. The flat plate punching device according to claim 2, further comprising a third suction conveyor which is provided so as to cross the first suction conveyor and the second suction conveyor above the interval and sucks and conveys a product sheet on the lower surface side. .. 2. The inspection unit includes a top-top photographing camera that takes a picture from above the product sheet while sucking the product sheet from below on the first or second suction conveyor.
Or, the flat plate punching device according to claim 3. The flat according to any one of claims 1 to 4, wherein the knock-off portion is provided with a guide member at both ends in the width direction for correcting a positional deviation of the product sheet separated from the gripper margin in a plan view. Board punching device. Claim 1 to claim 1, wherein the knock-off portion is provided with a brush portion that is separated from the gripper margin and then comes into contact with the upper surface of the rear end portion of the product sheet to be conveyed to the downstream side to extend the warp of the product sheet. 5. The flat plate punching device according to any one of 5.

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