JP5962324B2 - Sheet blank detection system - Google Patents

Description

  The present invention relates to a blank portion detecting system for separating a blank portion from a single-sheet blank used for manufacturing a blank for producing a paper container or the like and detecting the separated blank portion.

  Conventionally, printed blanks are produced, for example, to produce paper containers and the like. Such blanks are folded along the creases in a later step.

  Generally, a printed blank is first printed on a sheet-like blank, and a sheet-like blank including a plurality of product portions and blank portions between product portions is produced from the printed sheet-like blank. Next, the blank portion is separated from the product portion in the stripper portion of the sheet-like blank to obtain a blank made of the product portion.

  The stripper unit includes a pin drum having pins inserted into the blank part in order to separate the blank part from the product part of the sheet-fed blank, and the blank part is separated from the product part by inserting the pin of the pin drum into the blank part. Yes.

  In this case, if the pin of the pin drum cannot be reliably inserted into the blank portion, there is a problem that the blank portion cannot be reliably separated and the blank portion is mixed into the product portion.

JP-A-61-50797

  However, the actual situation is that a method for detecting whether or not the pin of the pin drum is securely inserted into the margin has not been developed yet.

  The present invention has been made in consideration of such points, and in the stripper portion installed to separate the blank portion from the product portion of the sheet-fed blank, whether or not the pin of the pin drum is inserted into the blank portion. It is an object of the present invention to provide a blank sheet blank space detection system capable of reliably detecting whether or not a single sheet blank has been detected.

  The present invention is provided on the downstream side of the single-wafer transport section, a single-wafer transport section that transports a single-wafer blank having a plurality of product sections and a blank section provided between the product sections via a connecting section, A stripper part that breaks the connecting part of the sheet-fed blank and separates the margin part from the product part, and the stripper part is a sheet between the pin drum and the pin drum that has a pin inserted into the margin part of the sheet-fed blank on the outer periphery. It has an anvil roller that feeds the sheet-shaped blank by sandwiching the leaf-shaped blank, and breaks the connecting portion, and is provided on the outside of the pin drum with a camera that images the blank portion separated from the product portion by inserting the pin, A margin detection system for a sheet-fed blank, wherein a position of a margin with respect to a pin is detected by this camera.

  The present invention is a sheet blank-blank margin detection system in which the camera is installed so as to face the center of rotation of the pin drum.

  The present invention is a sheet blank-blank blank space detection system in which a camera captures a blank space when a pin comes to the center of an imaging range of a camera.

  In the present invention, the image pickup range of the camera is in a range surrounded by a position of 10 ° forward of the pin drum in the rotation direction of the pin drum and a position of 10 ° rearward of the rotation direction of the pin drum. It is a detection system.

  The present invention is characterized in that the camera is installed so as to capture an arbitrary position from a position inclined downward by 10 ° to a position inclined downward by 45 ° with respect to a horizontal plane passing through the rotation center of the pin drum. This is a leaf blank blank detection system.

  The present invention is a sheet blank-blank blank portion detection system in which a control unit adjusts the rotational phase of a pin drum based on a detection signal from a camera.

  As described above, according to the present invention, the pin of the pin drum is securely inserted into the blank portion of the sheet-like blank, and the blank portion is reliably separated from the product portion.

FIG. 1 is an overall view showing a blank manufacturing system in which a blank sheet blank space detection system according to the present invention is incorporated. FIG. 2 is a side view showing a margin detection system for a sheet-like blank according to the present invention. FIGS. 3A, 3B, and 3C are side views showing the operation of the blank sheet blank space detection system according to the present invention. FIG. 4 is a flowchart showing the operation of the blank sheet blank space detection system according to the present invention. Fig.5 (a) is a top view which shows the sheet-like blank containing a some blank, FIG.5 (b) is an enlarged view of a sheet-like blank.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, the whole blank manufacturing system in which the blank portion blank detection system according to the present invention is incorporated will be described with reference to FIG.

  As shown in FIG. 1, the blank manufacturing system 11 winds a sheet-like blank S extending in a printed strip shape, and feeds the sheet-like blank S from a paper feeding unit 12 and a paper feeding unit 12. The printing state detection unit 13 for detecting the appropriateness of the printing state of the sheet-like blank S, the sheet conveyance unit 14 for conveying the sheet-like blank S, and the sheet-like blank S conveyed by the sheet-like conveyance unit 14 are struck with a platen. The punching part 15 which cuts and produces the sheet-like blank 5 (refer Fig.5 (a) (b)) is provided. Note that the sheet-like blank 15 may be transported from the paper supply unit 12, and the platen may be a rotary die cutter.

  Further, on the downstream side of the punching unit 15, a sheet feeding unit 16 including a conveyor for transporting the sheet-like blank 5 is provided, and on the downstream side of the sheet feeding unit 16, a printed blank that becomes a product part from the sheet-like blank 5. A stripper unit 17 that separates 1 (also simply referred to as a blank) from the margin 2 is provided. A defective blank discharge system 10 for discharging defective blanks to the outside is disposed downstream of the stripper unit 17, and the non-defective blanks sorted by the defective blank discharge system 10 are then transferred to the next process by the blank transport unit 18. Be transported. In addition, the conveyance speed of the blank 1 is 120-210 m / min.

  In addition, the sheet feeding unit 12, the printing state detecting unit 13, the sheet conveying unit 14, the punching unit 15, the sheet feeding unit 16, the stripper unit 17, the defective blank discharge system 10 and the blank conveying unit 18 are all controlled. Connected to the unit 19 and driven and controlled by the control unit 19.

  Among these, the printing state detection unit 13 detects the suitability of the printing state of the sheet blank S that is unwound from the paper supply unit 12. Can be detected.

  Specifically, the printing state detection unit 13 detects the printing state, dirt, foreign matter, and the like applied to the blank 1 that is the product portion of the sheet-like blank S, and sends the detection result to the control unit 19. Yes.

  The printing state detection unit 13 is provided between the paper feeding unit 12 and the sheet conveyance unit 14, and the printing state detection unit 13 is not limited to the case where the printing state detection unit 13 detects the sheet-like blank S. The printing state detection unit 13 detects the printing state, dirt, foreign matter, and the like of the sheet-like blank 5 produced by the punching unit 15, and the detection result is used as a control unit. 19 may be sent.

  The punching unit 15 punches the sheet-like blank S to produce the sheet-like blank 5.

  Here, with reference to FIGS. 5A and 5B, the sheet-like blank 5 formed by punching the sheet-like blank S will be described.

  As shown in FIGS. 5A and 5B, the sheet-fed blank 5 has a plurality of, for example, 3 × 7 blanks 1 serving as product parts, and a blank portion 2 formed between the blanks 1. Moreover, each blank 1 and the margin part 2 are mutually isolate | separated in parts other than the several connection part 3, and each blank 1 and the margin part 2 can be isolate | separated completely by breaking the connection part 3. FIG.

  That is, the sheet-like blank 5 having the blank 1 and the blank part 2 produced in the punching part 15 is sent to the stripper part 17, and the connecting part 3 is broken in the stripper part 17. Separated from the margin 2.

  By the way, since each blank 1 separated from the blank part 2 in the stripper unit 17 includes a non-defective product blank with an appropriate printing state and a defective product blank with an inappropriate printing state, the defective product blank is a defective product blank discharge system. 10, only the remaining non-defective blanks are sent to the next process via a blank transport unit 18 composed of a conveyor.

  Next, a margin detection system for a sheet-fed blank according to the present invention will be described.

  The blank sheet blank space detection system includes a sheet conveyance unit 16 and a stripper unit 17. Among these, the sheet feeding part 16 conveys the sheet-like blank 5 produced in the punching part 15 to the stripper part 17, and the stripper part 17 breaks the connecting part 3 of the sheet-like blank 5 to produce a product. The blank portion 2 is separated from the portion (also simply referred to as a blank) 1.

  Next, the stripper unit 17 will be described with reference to FIG. As shown in FIG. 2, the stripper unit 17 sandwiches the sheet-like blank 5 between the pin drum 30 having a plurality of pins 31 inserted into the margin part 2 of the sheet-like blank 5 on the outer periphery and the sheet drum-like blank 5. An anvil roller 35 that breaks the connecting portion 3 while feeding out 5 is provided, and a recess 36 into which the pin 31 of the pin drum 30 enters is provided on the outer periphery of the anvil roller 35.

  The pin 31 of the pin drum 30 is held by a pin holding portion 31a provided on the outer periphery of the pin drum 30 so as to be movable in the radial direction. That is, a cam mechanism (not shown) is provided inside the pin drum 30, and when the pin 31 comes to the upper end of the pin drum 30 by this cam mechanism, the pin 31 held by the pin holding portion 31 a protrudes radially outward from the pin drum 30. It is like that. Then, as the pin 31 moves from the upper end to the lower end of the pin drum 30 by the rotation of the pin drum 30, the pin 31 held by the pin holding portion 31a is pulled inward, and further, the pin 31 moves from the lower end to the upper end of the pin drum 30. The pin 31 held by the pin holding portion 31a again protrudes radially outward from the pin drum 30. When the pin 31 is pulled inward in the radial direction, the blank portion 2 is detached from the pin 31.

  The pin drum 30 is driven by a drive motor 33, and the drive motor 33 is controlled by the control unit 19. The camera 37 detects the blank portion 2 into which the pin 31 is inserted. In order to reduce the probability that the blank portion 2 is mixed into the product portion 1, the camera 37 images a position away from the conveyance line of the product portion 1. It is preferable that it is installed so as to image a position below the horizontal plane P passing through the rotation center 30a of the pin drum 30.

  Among these, the camera 37 is preferably installed so as to capture an arbitrary position from a position 30b inclined downward by 10 ° to a position 30c inclined by 45 ° with respect to the horizontal plane P passing through the rotation center 30a of the pin drum 30. .

  The camera 37 is installed so as to face the rotation center 30 a of the pin drum 30, and when the pin 31 comes to the center of the imaging range of the camera 37, the camera 37 images the blank portion 2. Note that the imaging range of the camera 37 is surrounded by a position advanced by an angle α1 from the center of the imaging range to the front in the rotation direction of the pin drum 30 and a position returned from the center of the imaging range by the angle α2 to the rear in the rotation direction of the pin drum 30. Is within the specified range. The angle α1 forward in the rotational direction and the angle α2 backward in the rotational direction are preferably α1 = 0 ° to 10 ° and α2 = 0 ° to 10 °.

  In this case, if α1 and α2 are larger than 10 °, not only the detection error increases, but also the image processing time for image processing of the image detected by the camera 37 in the control unit 19 takes time. For example, the sheet blank 5 In this case, the margin portion 2 of the sheet-like blank 5 that is conveyed at high speed cannot be reliably detected.

  In addition, after imaging the blank part 2 in which the pin 31 is inserted by the camera 37, detection information from the camera 37 is sent to the control unit 19. Then, the control unit 19 performs necessary image processing based on the detection information from the camera 37. As a result, when the control unit 19 determines that the pin 31 is in the center of the blank portion 2, the drive motor 33 is continuously driven as it is, and the position of the pin 31 is off the center of the blank portion 2. If it is determined, the drive motor 33 is controlled to adjust the rotational phase of the pin drum.

  As shown in FIG. 2, an illumination unit 38 that illuminates the blank portion 2 imaged by the camera 37 is provided below the camera 37. If there is no problem with illuminance, the illumination unit 38 may not be provided.

  As described above, the rotation of the pin drum 30 causes the pins 31 provided on the outer periphery of the pin drum 30 to be drawn inward in the radial direction from the upper end to the lower end. In this case, when the pin 31 comes to a position below the horizontal plane P, for example, by about 60 °, the pin 31 inserted into the blank portion 2 comes out of the blank portion 2, whereby the blank portion 2 is removed from the pin drum 30. Are dropped into the blank space accumulating device 40 provided below the image data and accumulated. Note that the margin part accumulating device 40 is not necessarily provided.

  In addition, the sheet-like blank 5 has the blank 1 of 3 rows x 7 steps as described above, and the blank portion blank detection system according to the present invention actually processes the blank 1 of 3 rows. Although shown (see FIG. 5A), only one blank 1 is shown in FIG.

  Next, the operation of the present embodiment having such a configuration will be described.

  First, as shown in FIG. 1, the printed sheet-like blank S is wound around the sheet feeding unit 12, and the sheet-like blank S is unwound from the sheet feeding unit 12.

  Next, in the printing state detection unit 13, whether or not the printing state of the sheet blank S unwound from the paper feeding unit 12 is detected is detected, and the sheet blank S is conveyed by the sheet conveyance unit 14.

  As described above, the printing state detection unit 13 detects whether or not the printing state of the sheet-like blank S unwound from the paper feeding unit 12 is appropriate. In this case, the printing state detection unit 13 may detect not only the printing state of the sheet blank S, but also the dirt, foreign matter, and the like of the sheet blank S.

  Specifically, the printing state detection unit 13 detects the printing state, dirt, foreign matter, and the like applied to the blank 1 that is the product portion of the sheet blank S, and sends the detection result to the control unit 19.

  Next, the sheet-like blank S conveyed by the sheet conveying unit 14 is sent to the punching unit 15. Then, in the punching part 15, the sheet-like blank S is punched and the sheet-like blank 5 is obtained.

  As shown in FIGS. 5A and 5B, the sheet-fed blank 5 has a plurality of, for example, 3 × 7 blanks 1 serving as product parts, and a blank portion 2 formed between the blanks 1. Further, each blank 1 and blank portion 2 are separated from each other at portions other than the plurality of connecting portions 3.

  The sheet-like blank 5 having the blank 1 and the blank part 2 produced in the punching part 15 is sent to the stripper part 17. And in this stripper part 17, the connection part 3 is fractured | ruptured, each blank 1 is isolate | separated from the blank part 2, and the blank 1 arrange | positioned in 3 rows and 7 steps | rows in this way is obtained.

  Next, the operation of the stripper unit 17 will be described below with reference to FIGS.

  First, the sheet-like blank 5 is fed from the sheet-fed conveyance unit 16 through the inlet conveyance unit 17a, and is fed between the pin drum 30 of the stripper unit 17 and the anvil roller 35 at a conveyance speed of 120 to 210 m / min. 30 and the anvil roller 35. In this case, the pin 31 provided on the outer periphery of the pin drum 30 is inserted into the blank portion 2 of the sheet-like blank 5, and the pin 31 of the pin drum 30 enters the recess 36 of the anvil roller 35.

  Next, the sheet blank 5 is sent downstream from between the pin drum 30 and the anvil roller 35. In this case, the joint part 3 of the sheet-like blank 5 is broken, and the blank part 2 is separated from the product part (blank) 1 of the sheet-like blank 5. Then, the product part (blank 1) is sent to the defective blank discharge system 10 side via the outlet transport part 17b, and the blank part 2 is sent below the pin drum 30 as the pin drum 30 rotates.

  During this time, as the pin drum 30 rotates, the pin 31 is pulled inward in the radial direction, whereby the pin 31 is pulled out from the blank portion 2, and the blank portion 2 is then dropped from the pin drum 31 into the blank portion accumulating device 40. Then, it is accumulated in the margin part accumulating device 40.

  The blank portion 2 into which the pin 31 of the pin drum 30 is inserted is imaged by the camera 37, and the camera 37 detection information is sent to the control unit 19. The camera 37 is installed so as to image a position that faces the rotation center 30a of the pin drum 30 and is inclined 20 ° downward with respect to a horizontal plane P passing through the rotation center 30a of the pin drum 30.

  That is, when the pin 31 comes to the center of the imaging range of the camera 37, the camera 37 images the blank portion 2 and detects the position of the blank portion 2 with respect to the pin 31.

  Next, the operation of the control unit 19 receiving the detection information from the camera 37 will be described with reference to FIGS.

  First, the camera 37 starts detecting the margin 2, and the control unit 19 determines that when the pin 31 is on the center line 1 in the conveyance direction D of the margin 2 based on the detection information from the camera 37, the margin 2 is It is determined that the pin 31 is in a normal position (FIG. 3A).

  In FIG. 3A, the length L1 of the margin 2 is 10 mm.

  On the other hand, when the pin 31 is displaced by the distance L2 with respect to the center line l of the margin part 2, the control unit 19 indicates that the margin part 2 is displaced with respect to the pin 31 when the distance L2 is 1.5 mm or more. Judgment is made (FIG. 3B).

  At this time, the control unit 19 outputs a phase adjustment signal to the drive motor 33 to control the drive motor 33. That is, the control unit 19 adjusts the rotational phase of the pin drum 30 so that the pin 31 comes on the center line 1 of the blank portion 2.

  Thereafter, when the control unit 19 determines that the blank portion 2 is in a normal position with respect to the pin 31 based on the detection information from the camera 37, the adjustment of the rotational phase of the pin drum 30 is finished.

  In the above embodiment, when the control unit 19 determines that the blank portion 2 is displaced from the pin 31 based on the detection information from the camera 37, the rotational phase of the pin drum 30 is controlled by controlling the drive motor 33. Although the example which adjusted automatically was shown (refer FIG. 4), the control part 19 may stop the whole blank manufacturing system and the operator may adjust the rotational phase of the pin drum 30 manually. In this case, the detection status is displayed on the monitor so that the operator can confirm the detection status.

  When the control unit 19 determines that the center line 1 of the blank portion 2 is inclined with respect to the arrangement direction of the pins 31 based on the detection information from the camera 37 (see FIG. 3C), the control is performed. Section 19 immediately stops the entire blank manufacturing system. In this case, the operator finds the cause of the center line 1 of the blank portion 2 being inclined with respect to the arrangement direction of the pins 31 and performs necessary repairs.

  Further, when the control unit 19 determines from the detection information from the camera 37 that the blank portion 2 and the pin 31 are completely separated (see FIG. 3D), the control unit 19 also in this case, the blank manufacturing system. Stop the whole immediately. Then, the operator finds out the cause that the blank portion 2 and the pin 31 are completely separated, and performs necessary repairs.

  In this way, the product part (blank) 1 separated from the blank part 2 in the stripper part 17 is obtained. Since the blank 1 obtained in the stripper unit 17 includes a non-defective product blank in which the printing state is appropriate and a defective blank in which the printing state is inappropriate, it is necessary to discharge the defective product blank to the outside by the defective product blank discharge system 10. There is.

  That is, the blanks 1 arranged in 3 rows × 7 stages from the outlet conveyance unit 17 b of the stripper unit 17 are sent into the defective product blank discharge system 10.

  In this case, a signal from the printing state detection unit 13 is input to the control unit 19, and the control unit 19 distinguishes each blank 1 into a non-defective product blank and a defective product blank based on the signal from the printing state detection unit 13. Identify.

  Next, the control unit 19 separates the defective product blank from the non-defective product blank in the defective product blank discharge system 10.

  In this manner, the defective product blank is separated from the good product blank, and only the good product blank is sent from the blank transport unit 18 to the next process.

  As described above, according to the present embodiment, the blank portion 2 into which the pin 31 of the pin drum 30 is inserted is imaged by the camera 37. Accordingly, it can be reliably detected whether or not the pin 31 of the pin drum 30 is inserted into the blank portion 2, and the blank portion 2 can be prevented from being mixed into the product portion 1.

DESCRIPTION OF SYMBOLS 1 Blank 3 Linking part 5 Sheet-fed blank 10 Defective product blank discharge system 12 Paper feed part 13 Printing state detection part 14 Sheet conveyance part 15 Punching part 16 Sheet-fed conveyance part 17 Stripper part 18 Blank conveyance part 19 Control part 30 Pin drum 30a Rotation center 31 Pin 31a Pin holding part 33 Drive motor 35 Anvil roller 36 Recess 37 Camera 38 Illumination part 40 Margin part accumulating device

Claims (6)

A sheet-fed transport unit that transports a sheet-shaped blank having a plurality of product parts and a margin part provided between the product parts via a connecting part;
A stripper unit provided on the downstream side of the single wafer conveyance unit, and rupturing the joint of the single sheet blank to separate the blank portion from the product unit;
The stripper part has a pin drum having pins inserted into the margins of the sheet-like blank on the outer periphery, an anvil roller that feeds the sheet-like blank while pinching the sheet-like blank between the pin drums, and breaks the joint part.
A blank space detection of a sheet-like blank characterized in that a camera is provided on the outside of the pin drum to image the blank portion separated from the product portion by inserting the pin, and the position of the blank portion relative to the pin is detected by this camera. system.   The margin detection system for a sheet-like blank according to claim 1, wherein the camera is installed so as to face the rotation center of the pin drum.   The margin detection system for a sheet-like blank according to claim 1 or 2, wherein when the pin comes to the center of the imaging range of the camera, the camera images the margin.   The imaging range of the camera is in a range surrounded by a position of 10 ° forward of the rotation direction of the pin drum and a position of 10 ° rearward of the rotation direction from the center thereof. Blank sheet blank detection system.   2. The camera according to claim 1, wherein the camera is installed so as to image an arbitrary position from a position inclined downward by 10 ° to a position inclined downward by 45 ° with respect to a horizontal plane passing through the rotation center of the pin drum. 5. A blank portion detection system for a sheet-like blank according to any one of 4 above.   6. The sheet blank-blank margin detection system according to claim 1, wherein the rotational phase of the pin drum is adjusted by the controller based on a detection signal from the camera.

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