JP2006305925A - Method and device for detecting tilting of corrugated cardboard sheet and slitter scorer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect the tilting of a corrugated cardboard sheet occurring in a slitter scorer with regard to a method and device for detecting the tilting of the corrugated cardboard sheet and the slitter scorer. <P>SOLUTION: The device is provided with a first position detecting means 20 which is installed upstream in the sheet transportation direction from a scorer 10 and detects the position in the sheet width direction of the corrugated cardboard sheet 5, a second position detecting means 22 which is installed downstream in the sheet transportation direction from a slitter 11 and detects the position in the sheet width direction of the sheet 5, and a calculation means 27a which calculates the tilting quantity of the sheet 5 based on information on the position of the sheet 5 detected by the first and second position detecting means 20 and 22. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cardboard sheet skew detection device, a detection method, and a slitter scorer that detect skew of a cardboard sheet in a slitter scorer of a cardboard sheet manufacturing apparatus.

  FIG. 5 is a side view schematically showing the overall configuration of a general corrugated sheet manufacturing apparatus. As shown in FIG. 5, the corrugated sheet manufacturing apparatus unwinds the back liner 1 from the back liner winding paper mounted on the back liner auto splicer unit 100 and is mounted on the center core auto splicer unit 101. The core 2 is unwound from the core winding paper, and in the single facer 102, the core 2 is stepped into a corrugated shape, and glued to the steps of the core 2, and then the core 2 and the back liner 1 are pasted. Together, a single-stage sheet (single-sided cardboard sheet) 3 is formed. Thereafter, the single-stage sheet 3 is accumulated on the bridge 104 through the bridge pick-up conveyor 103, and then glued to the center 2 side top of the single-stage sheet 3 by the glue machine 105 and conveyed to the double facer 107. Also, the front liner 4 is unwound from the front liner winding paper mounted on the front liner auto-splicer section 106, and the front liner 4 and the single-stage sheet 3 are bonded together by the double facer 107, and the double-sided cardboard sheet is pressed and heated. 5 (hereinafter simply referred to as a corrugated cardboard sheet). Thereafter, the slitter scorer 108 puts a ruled line and cuts it, and then cuts the corrugated cardboard sheet 5 in the sheet width direction by the cut-off 109 and stacks it on the stacker 110.

  By the way, as shown in FIG. 6, the slitter scorer 108 of the corrugated sheet manufacturing apparatus described above includes a scorer 10 for making a ruled line (fold) in the corrugated sheet 5 along the sheet conveying direction, and a downstream side of the scorer 10 in the sheet conveying direction. And a slitter 11 for cutting the cardboard sheet 5 along the sheet conveying direction. The scorer 10 includes a scorer shaft 10b extending in the sheet width direction, and a scorer roll 10a that is provided side by side in the axial direction of the scorer shaft 10b and puts a ruled line on the corrugated cardboard sheet 5. 11 includes a slitter shaft 11b that extends in the sheet width direction, and a slitter roll 11a that is provided side by side in the axial direction of the slitter shaft 11b and cuts the cardboard sheet 5.

Further, a position for cutting by the slitter roll 11a (slitter dimension L ₀ shown in FIG. 6) and a position for putting a ruled line by the scorer roll 10a (scorer dimensions L ₁ , L ₂ , L ₃ shown in FIG. 6) are previously determined for each product. By inputting such product information to a control device (not shown) of the slitter scorer 108, the control device pre-determines the scorer roll 10a and the slitter roll 11a according to the product information before starting production. The sheet is moved to a position in the sheet width direction and fixed at that position.

  In such a slitter scorer 108, the scorer roll 10a and the slitter roll 11a are accurately positioned within an error range of ± 0.5 mm. Therefore, if the corrugated cardboard sheet 5 travels straight, no dimensional deviation occurs. As shown in FIG. 7, when the corrugated cardboard sheet 5 travels obliquely (skew), a dimensional deviation occurs. For this reason, the operator checks the product with the stacker 110, but often notices a dimensional deviation in the box making process after the product is completed.

  Therefore, for example, a skew detecting device for corrugated cardboard sheets as shown in FIG. 8 has been developed. As shown in FIG. 8, the skew detection device for a corrugated cardboard sheet is provided on the upstream side of the scorer 10 in the sheet conveying direction, and includes a vision sensor 124 that images both ends of the corrugated cardboard sheet 5 in the width direction, and a lower part of the corrugated cardboard sheet 5. And the corrugated cardboard sheet 5 with respect to the sheet conveying direction (or the sheet width direction) with respect to the fluorescent lamp 125 as a light source that irradiates light toward the detection region by the vision sensor 124 and the scorer 10 and the slitter 11. The driving device 126 tilted in the plane and the driving device based on the amount of skew of the corrugated cardboard sheet 5 taken by the vision sensor 124 with respect to the sheet conveying direction (that is, the amount of inclination from the center line of the corrugated cardboard sheet 5 during normal running). And a control device 127 for controlling 126.

  In addition, the code | symbol 120,121,122 shown in FIG. 8 is a pressing roll for correct | amending the curvature and lifting of the corrugated cardboard sheet | seat 5. As shown in FIG. Further, on the both ends (operation side and drive side) in the sheet width direction immediately downstream of the slitter 11 in the sheet conveying direction, trimming of the corrugated cardboard sheet 5 cut by the slitters 11a positioned on both ends in the sheet width direction (trim). A trim shooter 123 for sucking in 5a is installed. In FIG. 8, only the trim shooter 123 provided at one end portion in the sheet width direction is shown, and the trim shooter provided at the other end portion in the sheet width direction is omitted.

Further, in Patent Document 1, a dummy ruled line roll is provided at a position corresponding to the trim at one end in the axial direction of the scorer shaft 10b, and a braking resistance is added to the corrugated cardboard sheet by the dummy ruled line roll to thereby reduce the sheet width. Techniques are disclosed that balance resistance in direction.
Japanese Utility Model Publication No. 5-95726

  However, the above-described conventional cardboard sheet skew detection device can detect the skew of the cardboard sheet 5 on the upstream side in the sheet conveying direction from the scorer 10, but the cardboard sheet 5 generated inside the slitter scorer 108 can be detected. It cannot be detected until skew. For this reason, when skew of the corrugated cardboard sheet 5 occurs inside the slitter scorer 108, a dimensional deviation occurs.

Further, in the technique of Patent Document 1, braking resistance is added to the corrugated cardboard sheet at the position of the scorer, and the skew of the corrugated cardboard sheet generated inside the slitter scorer is the same as the conventional skew detecting device for the corrugated cardboard sheet. Cannot detect up to line.
The present invention was devised in view of such problems, and provides a cardboard sheet skew detection device, a detection method, and a slitter score that can detect the skew of the cardboard sheet generated inside the slitter scorer. For the purpose.

  For this reason, the skew detection device for a corrugated cardboard sheet according to the first aspect of the present invention is provided with a scorer for marking the corrugated cardboard sheet along the sheet conveying direction, and provided downstream of the scorer in the sheet conveying direction, A cardboard sheet skew detection device for detecting skew of a cardboard sheet in a slitter scorer of a cardboard sheet manufacturing apparatus provided with a slitter that cuts the cardboard sheet along a sheet conveying direction. A first position detecting means for detecting a position of the corrugated cardboard sheet in the sheet width direction; and a position of the corrugated cardboard sheet in the sheet width direction provided downstream of the slitter. Second position detecting means for detecting the first position detecting means, and the first position detecting means and the second position detecting means It is characterized in that it includes a calculating means for calculating a skew amount of the step board sheet based on the position information of the ball seat.

The skew detection device for a corrugated cardboard sheet according to a second aspect of the present invention is the device according to the first aspect, further comprising notifying means for notifying an amount of skew of the corrugated cardboard sheet calculated by the calculation means. It is a feature.
The skew detection apparatus for a corrugated cardboard sheet according to a third aspect of the present invention is the apparatus according to the first or second aspect, wherein the first position detection means and the second position detection means are arranged with respect to the cardboard sheet. It is an optical sensor that detects the position of the corrugated cardboard sheet in the sheet width direction in a non-contact manner.

  A slitter scorer according to a fourth aspect of the present invention is a skew detection device for corrugated cardboard sheets according to any one of the first to third aspects, and a drive for tilting the scorer and the slitter with respect to the sheet conveying direction. Based on the skew amount of the corrugated cardboard sheet calculated by the apparatus and the calculation means, the entire scorer and the slitter are in the same direction as the skew direction of the corrugated cardboard sheet by the skew amount relative to the sheet conveying direction. And drive control means for controlling the drive device so as to be inclined.

  The skew detection method for a corrugated cardboard sheet according to the present invention according to claim 5 is provided with a scorer for marking the cardboard sheet along the sheet conveying direction, and provided downstream of the scorer in the sheet conveying direction. A skew detection method for corrugated sheet for detecting skew of the corrugated sheet in a slitter scorer of a corrugated board manufacturing apparatus provided with a slitter that cuts along the sheet conveying direction. A first position in the sheet width direction of the corrugated cardboard sheet is detected on the upstream side in the sheet conveying direction, and a second position in the sheet width direction of the cardboard sheet is detected on the downstream side in the sheet conveying direction from the slitter. In addition, the skew amount of the corrugated cardboard sheet is calculated based on the first position and the second position detected in the first step. It is characterized in that.

According to the skew detection device for a corrugated cardboard sheet according to the first aspect of the present invention, the calculating means detects the corrugated cardboard sheet based on the position information of the corrugated cardboard sheet detected by the first position detecting means and the second position detecting means. Since the skew amount is calculated, it is possible to detect the skew of the cardboard sheet that occurs inside the slitter scorer.
According to the skew detection device for a corrugated cardboard sheet according to the second aspect of the present invention, the corrugated cardboard sheet is provided with notifying means for notifying the skew amount of the corrugated cardboard sheet calculated by the calculation means. The operator can be notified that the user is performing.

According to the skew detection device for a corrugated cardboard sheet according to the third aspect of the present invention, the first position detection means and the second position detection means detect the position of the cardboard sheet in a non-contact manner with respect to the cardboard sheet. Since the sensor is a type sensor, the position of the cardboard sheet in the sheet width direction can be detected without damaging the cardboard sheet.
According to the slitter scorer of the present invention as set forth in claim 4, the drive control means is based on the skew amount of the corrugated cardboard sheet calculated by the calculation means, so that the entire scorer and slitter are equal to the skew amount relative to the sheet conveying direction. Since the driving device is controlled so as to be inclined in the same direction as the skew direction of the corrugated cardboard sheet, it is possible to prevent deviation of the ruled position by the scorer and the cutting position by the slitter.

  According to the skew detection method for a corrugated cardboard sheet according to the fifth aspect of the present invention, the first position in the sheet width direction of the corrugated cardboard sheet is detected on the upstream side in the sheet conveying direction from the scorer, and the sheet conveying direction from the slitter. Since the second position in the sheet width direction of the cardboard sheet is detected on the downstream side and the skew amount of the cardboard sheet is calculated based on the first position and the second position, the corrugated sheet generated inside the slitter scorer Skew can be detected.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(A) First Embodiment FIGS. 1 and 2 are diagrams for explaining a cardboard sheet skew detection device as a first embodiment of the present invention. FIG. 1 schematically shows a slitter scorer of a cardboard sheet manufacturing device. FIG. 2 is a diagram schematically showing display contents of a display device that displays a skew state of a cardboard sheet. In FIG. 1, the same parts as those in the conventional example described above are indicated by the same reference numerals.

  As shown in FIG. 1, the slitter scorer 8 is provided on the corrugated cardboard sheet 5 along the sheet conveying direction along the scorer 10 and the scorer 10 downstream of the scorer 10 in the sheet conveying direction. And a slitter 11 that cuts along the line. The scorer 10 includes a scorer shaft 10b extending in the sheet width direction, and a scorer roll 10a that is provided side by side in the axial direction of the scorer shaft 10b and puts a ruled line on the corrugated cardboard sheet 5. 11 includes a slitter shaft 11b that extends in the sheet width direction, and a slitter roll 11a that is provided side by side in the axial direction of the slitter shaft 11b and cuts the cardboard sheet 5.

Further, the slitter scorer 8 has a function of tilting the entire scorer 10 and the slitter 11 (slitter scorer) as a single unit within the surface of the corrugated cardboard sheet 5 with respect to the sheet conveying direction, and the scorer roll 10a and the slitter roll 11a individually. A driving device 50 having a function of moving in the sheet width direction is provided.
The surface of the corrugated board 5 extends in the sheet width direction at three positions upstream of the scorer 10 in the sheet conveying direction, between the scorer 10 and the slitter 11, and downstream of the slitter 11 in the sheet conveying direction. Paper pressing rolls 120, 121, and 122 are provided for correcting the warpage and lifting of the corrugated cardboard sheet 5 in contact therewith. Further, on the both ends (operation side and drive side) in the sheet width direction immediately downstream of the slitter 11 in the sheet conveying direction, trimming (trim) of the corrugated cardboard sheet 5 cut by the slitter rolls 11a located on both ends in the sheet width direction. ) A trim shooter 123 for sucking 5a is installed. In FIG. 1, only the trim shooter 123 provided at one end in the sheet width direction (upper side in FIG. 1) is shown, and the illustration of the trim shooter provided at the other end in the sheet width direction (lower side in FIG. 1) is omitted. Yes.

The slitter scorer 8 according to the present embodiment includes a first tracking sensor (first position detecting means) 20, a second tracking sensor (second position detecting means) 22, a controller 27, and a display device (notifying means). 28 is provided.
The first tracking sensor 20 is provided upstream of the scorer 10 in the sheet conveying direction, and detects the position (first position) of the corrugated cardboard sheet 5 in the sheet width direction. The second tracking sensor 22 is provided downstream of the slitter 11 in the sheet conveying direction, and detects the position (second position) of the cardboard sheet 5 in the sheet width direction. The first tracking sensor 20 and the second tracking sensor 22 are known optical sensors such as an optical mouse that detects the position of the cardboard sheet 5 in the sheet width direction without contact with the cardboard sheet 5. The position of the corrugated board sheet 5 in the sheet width direction can be detected without damaging the sheet.

  Further, the first tracking sensor 20 and the second tracking sensor 22 are fixed at positions close to the surface of the cardboard sheet 5 on the conveyance center line CL of the cardboard sheet 5. Therefore, if the first tracking sensor 20 and the second tracking sensor 22 are preset to zero in a state where the corrugated cardboard sheet 5 is not skewed, the sheet width of the corrugated cardboard sheet 5 when the corrugated cardboard sheet 5 is skewed thereafter. The amount of movement in the direction (that is, the amount of deviation from the transport center line CL) is known.

The controller 27 incorporates functions of a calculation unit (calculation unit) 27a, a drive control unit (drive control unit) 27b, and a display control unit (display control unit) 27c. Referring to FIG. 2, the calculation unit 27 a is obtained from the position P ₂₀ of the cardboard sheet 5 at the position S ₂₀ of the first tracking sensor 20 obtained from the first tracking sensor ₂₀ and the second tracking sensor 22. the position P ₂₂ of the cardboard sheet 5 at the position S ₂₂ of the second tracking sensor 22 with straight lines guess the skew state of the cardboard sheet 5, the skew state of the guess cardboard sheet 5, corrugated cardboard sheet 5 The skew amount (that is, the amount of inclination from the center line CL of the corrugated board sheet 5 during normal running) θ with respect to the sheet conveying direction is calculated. For example, the shift amount in the sheet width direction of the corrugated cardboard sheet 5 at the position S ₂₀ of the first tracking sensor 20 D _20, second tracking corrugated cardboard sheet 5 in the sheet width direction of the displacement amount D ₂₂ at the position S ₂₂ of the sensor 22, When the distance from the position S ₂₀ of the first tracking sensor 20 to the position S ₂₂ of the second tracking sensor 22 and D _1, the skew amount θ is be determined from _{tanθ = (D 22 -D 20)} / D 1 it can. The skew detection apparatus according to the present invention includes the first tracking sensor 20, the second tracking sensor 22, and the calculation unit 27a described above.

The drive control unit (drive control means) 27b is based on the skew amount θ with respect to the sheet conveyance direction of the corrugated cardboard sheet 5 calculated by the calculation unit 27a, and the entire scorer 10 and the slitter 11 are skewed with respect to the sheet conveyance direction. The drive device 50 is controlled to be inclined in the same direction as the skew direction of the corrugated cardboard sheet 5 by θ.
As described above, the position for cutting by the slitter roll 11a and the position for ruled lines by the scorer roll 10a are set in advance for each product, and such product information is sent from the input device (not shown) to the drive control unit 27b. By being input, the drive control unit 27b controls the drive device 50 before starting production to move the scorer roll 10a and the slitter roll 11a to predetermined positions in the sheet width direction according to the product information and fix them at that position. It is supposed to be.

As shown in FIG. 2, the display control unit 27 c displays the position P ₂₀ of the cardboard sheet 5 obtained from the first tracking sensor 20 and the cardboard sheet obtained from the second tracking sensor 22 on the screen 28 a of the display device 28. The position P _{22 of} 5 is displayed as a pointer (for example, as a triangle mark as shown in FIG. 2), and the skew state of the cardboard sheet 5 is schematically displayed.

Since the cardboard sheet skew detection device according to the first embodiment of the present invention is configured as described above, the skew of the cardboard sheet 5 generated inside the slitter scorer 8 can be detected.
Further, since the skew state of the cardboard sheet 5 is displayed on the display device 28, it is possible to notify the operator that the cardboard sheet 5 is skewed inside the slitter scorer 8. Therefore, the operator can know the possibility that the corrugated cardboard sheet 5 has a dimensional deviation and can take an early action.

Further, according to the slitter scorer 8 provided with the skew detection device, when the cardboard sheet 5 is skewed inside the slitter scorer 8, the scorer 10 and the slitter 11 as a whole are in accordance with the skew of the cardboard sheet 5. Since the sheet is automatically tilted with respect to the sheet conveyance direction, it is possible to prevent deviation of the ruled position by the scorer 10 and the cutting position by the slitter 11.
Further, since the first tracking sensor 20 and the second tracking sensor 22 are optical sensors that are less expensive than conventional vision sensors, the apparatus can be kept at a low cost.

(B) Second Embodiment FIG. 3 is a perspective view schematically illustrating a slitter scorer of a corrugated sheet manufacturing apparatus, illustrating a skew detection device for corrugated cardboard sheets as a second embodiment of the present invention. . In FIG. 3, the same parts as those in the first embodiment described above are indicated by the same reference numerals. In the following, differences from the first embodiment will be described, and other configurations will be omitted because they are the same as those of the first embodiment.

  As shown in FIG. 3, in the present embodiment, a third tracking sensor (third position detection unit) 21 is provided downstream of the scorer 10 in the sheet conveying direction and upstream of the paper pressing roll 121. It has been. The third tracking sensor 21 is configured in the same manner as the first tracking sensor 20 and the second tracking sensor 22 of the first embodiment, and detects the position of the cardboard sheet 5 in the sheet width direction.

Then, the calculation unit 27 a uses not only the position information of the cardboard sheet 5 from the first tracking sensor 20 and the second tracking sensor 22 but also the position information of the cardboard sheet 5 from the third tracking sensor 21 to use the slitter scorer 8. The skew amount of the corrugated cardboard sheet 5 inside is calculated. The skew amount is, for example, the skew amount from the position S ₂₀ of the first tracking sensor 20 to the position S ₂₁ of the third tracking sensor 21, from the position S ₂₁ of the third tracking sensor 21 of the second tracking sensor 22 average of the skew amount to the position S ₂₂ (for example, a simple average or a weighted average obtained by an appropriate weighting) can be obtained from.

Further, the drive control unit 27b automatically moves the entire scorer 10 and the slitter 11 in the sheet conveyance direction according to the skew of the cardboard sheet 5 based on the skew amount of the cardboard sheet 5 calculated by the calculation unit 27a. Tilt.
Further, the display control unit 27 c displays the position P ₂₀ of the cardboard sheet 5 obtained from the first tracking sensor ₂₀ and the position P _{22 of the} cardboard sheet 5 obtained from the second tracking sensor 22 on the screen 28 a of the display device 28. The position of the cardboard sheet 5 obtained from the third tracking sensor 21 is displayed as a pointer, and the skew state of the cardboard sheet 5 is schematically displayed.

Since the cardboard sheet skew detection device according to the second embodiment of the present invention is configured as described above, the skew of the cardboard sheet 5 generated inside the slitter scorer 8 can be detected more accurately than the first embodiment. can do.
Further, since the skew state of the corrugated cardboard sheet 5 can be displayed on the display device 28 with higher accuracy than in the first embodiment, the operator is notified in more detail that the corrugated cardboard sheet 5 is skewed inside the slitter scorer 8. Can do. Therefore, the operator can know the possibility that the corrugated cardboard sheet 5 has a dimensional deviation and can take an early action.

  Further, according to the slitter scorer 8 provided with the skew detection device, the entire scorer 10 and the slitter 11 can be automatically moved with respect to the sheet conveyance direction according to the skew of the cardboard sheet 5 with higher accuracy than the first embodiment. Since it is tilted, it is possible to more surely prevent the ruled position by the scorer 10 and the cutting position by the slitter 11 from shifting.

(C) Third Embodiment FIG. 4 is a diagram for explaining a cardboard sheet skew detection device as a third embodiment of the present invention, and is a perspective view schematically showing a slitter scorer of a cardboard sheet manufacturing device. . In FIG. 4, the same parts as those of the second embodiment described above are indicated by the same reference numerals. In the following, differences from the second embodiment will be described, and other configurations are the same as those of the second embodiment, and thus description thereof will be omitted.

  As shown in FIG. 4, in the present embodiment, the first vision sensor (first skew detection means) 23 is located downstream of the scorer 10 in the sheet conveyance direction and upstream of the third tracking sensor 21 in the sheet conveyance direction. And a second vision sensor (second skew detection means) 24 is provided downstream of the second tracking sensor 22 in the sheet conveying direction. The first vision sensor 23 and the second vision sensor 24 are fixed above the corrugated cardboard sheet 5, and images both ends of the corrugated cardboard sheet 5 in the width direction. Also, below the corrugated cardboard sheet 5, a fluorescent lamp 25 as a light source that shines light toward the imaging region by the first vision sensor 23 and a fluorescence as a light source that shines light toward the imaging region by the second vision sensor 24. A lamp 26 is provided.

The calculating unit 27 a not only detects the position information of the cardboard sheet 5 from the first tracking sensor 20, the second tracking sensor 22, and the third tracking sensor 21 but also the cardboard from the first vision sensor 23 and the second vision sensor 24. The skew amount information of the corrugated cardboard sheet 5 inside the slitter scorer 8 is also calculated using the skew amount information of the sheet 5. The skew amount is, for example, the skew amount from the position S ₂₀ of the first tracking sensor 20 to the position S ₂₁ of the third tracking sensor 21, from the position S ₂₁ of the third tracking sensor 21 of the second tracking sensor 22 a skew amount to the position S _22, be determined from the average of the skew amount obtained from the first vision sensor 23 and the second vision sensor 24 (e.g., a simple average or a weighted average obtained by an appropriate weighting) Can do.

Further, the drive control unit 27b automatically moves the entire scorer 10 and the slitter 11 in the sheet conveyance direction according to the skew of the cardboard sheet 5 based on the skew amount of the cardboard sheet 5 calculated by the calculation unit 27a. Tilt.
Furthermore, the display control unit 27c displays a pointer on the position of the corrugated cardboard sheet 5 obtained from the first tracking sensor 20, the second tracking sensor 22, and the third tracking sensor 21 on the screen 28a of the display device 28. The skew state of the corrugated cardboard sheet 5 is typically displayed using image information obtained from the vision sensor 23 and the second vision sensor.

Since the cardboard sheet skew detection device according to the third embodiment of the present invention is configured as described above, the skew of the cardboard sheet 5 generated inside the slitter scorer 8 can be detected more accurately than in the second embodiment. can do.
Further, since the skew state of the corrugated cardboard sheet 5 can be displayed on the display device 28 with higher accuracy than in the second embodiment, the operator can be notified in more detail that the corrugated cardboard sheet 5 is skewed inside the slitter scorer 8. Can do. Therefore, the operator can know the possibility that the corrugated cardboard sheet 5 has a dimensional deviation and can take an early action.

Further, according to the slitter scorer 8 provided with the skew detection device, the entire scorer 10 and the slitter 11 can be automatically moved with respect to the sheet conveyance direction in accordance with the skew of the corrugated cardboard sheet 5 with higher accuracy than in the second embodiment. Since it is tilted, it is possible to more surely prevent the ruled position by the scorer 10 and the cutting position by the slitter 11 from shifting.
Note that the entire scorer 10 and slitter 11 are tilted based on the skew amount obtained from the first vision sensor 23 and the second vision sensor 24 at the start, and then the first tracking sensor 20, the second tracking sensor 22, and the second The overall inclination of the scorer 10 and the slitter 11 may be appropriately adjusted based on the skew amount obtained from the three tracking sensor 21.

(D) Others Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above embodiment, the display device is used as the notification unit. However, an alarm device that issues an alarm when the skew amount of the cardboard sheet 5 exceeds a predetermined amount may be used. Alternatively, both the display device and the alarm device may be used.

  Further, the installation position of the first tracking sensor 20 may be on the upstream side of the scorer 10 in the sheet conveyance direction, and may be on the upstream side of the sheet pressing roll 120 in the sheet conveyance direction. Furthermore, the installation position of the third tracking sensor 21 may be between the scorer 10 and the slitter 11, and may be between the paper pressing roll 121 and the slitter 11. The first vision sensor 23 and the fluorescent lamp 25 may be installed between the scorer 10 and the slitter 11, between the first tracking sensor 21 and the paper pressing roll 121, or between the paper pressing roll 121 and the slitter. Of course, it may be between 11.

It is a figure for demonstrating the skew detection apparatus of the corrugated cardboard sheet as 1st Embodiment of this invention, and is a perspective view which shows typically the slitter scorer of a corrugated cardboard sheet manufacturing apparatus. It is a figure for demonstrating the skew detection apparatus of the cardboard sheet | seat as 1st Embodiment of this invention, and is a figure which shows typically the display content of the display apparatus which displays the skew state of a cardboard sheet | seat. It is a figure for demonstrating the skew detection apparatus of the corrugated cardboard sheet as 2nd Embodiment of this invention, and is a perspective view which shows typically the slitter scorer of a corrugated cardboard sheet manufacturing apparatus. It is a figure for demonstrating the skew detection apparatus of the corrugated cardboard sheet as 3rd Embodiment of this invention, and is a perspective view which shows typically the slitter scorer of a corrugated cardboard sheet manufacturing apparatus. It is a side view which shows typically the whole structure of a general corrugated board manufacturing apparatus. It is a top view of the conventional slitter scorer and a corrugated cardboard sheet. It is a figure for demonstrating the conventional subject, Comprising: It is a top view when a corrugated cardboard sheet | seat skews inside a slitter scorer. It is a perspective view which shows the skew detection apparatus of the conventional cardboard sheet | seat.

Explanation of symbols

5 Corrugated cardboard sheet 5a Cutting waste (trim)
8 slitter scorer 10 scorer 10a scorer roll 10b scorer shaft 11 slitter 11a slitter roll 11b slitter shaft 20 first tracking sensor (first position detecting means)
21 Third tracking sensor (third position detecting means)
22 Second tracking sensor (second position detecting means)
23 First vision sensor (first skew detection means)
24 Second vision sensor (second skew detection means)
25, 26 Fluorescent lamp 27 Controller 27a Calculation unit (calculation means)
27b Drive control unit (drive control means)
27c Display control unit (display control means)
28 Display device (notification means)
28a Screen of display device 50 Drive device 120, 121, 122 Paper holding roll 123 Trim shooter

Claims (5)

A corrugated sheet manufacturing apparatus comprising: a scorer that marks a corrugated sheet along a sheet conveying direction; and a slitter that is provided downstream of the scorer in the sheet conveying direction and cuts the corrugated sheet along the sheet conveying direction. A cardboard sheet skew detection device for detecting the skew of the cardboard sheet in the slitter scorer,
A first position detecting means provided upstream of the scorer in the sheet conveying direction and detecting a position of the corrugated cardboard sheet in the sheet width direction;
A second position detecting means provided downstream of the slitter in the sheet conveying direction and detecting the position of the corrugated sheet in the sheet width direction;
And calculating means for calculating a skew amount of the cardboard sheet based on position information of the cardboard sheet detected by the first position detecting means and the second position detecting means. A skew detection device for cardboard sheets. 2. The skew detecting device for corrugated cardboard sheets according to claim 1, further comprising notifying means for notifying the skew amount of the corrugated cardboard sheet calculated by the calculating means. The first position detecting means and the second position detecting means are optical sensors that detect the position of the cardboard sheet in the sheet width direction without contact with the cardboard sheet. Item 3. A skew detection device for cardboard sheets according to item 1 or 2. The skew detection device for corrugated cardboard sheets according to any one of claims 1 to 3,
A drive device that tilts the entire scorer and the slitter with respect to the sheet conveying direction;
Based on the skew amount of the corrugated cardboard sheet calculated by the calculating means, the entire scorer and the slitter are inclined in the same direction as the skew direction of the corrugated cardboard sheet by the skew amount relative to the sheet conveying direction. And a drive control means for controlling the drive device. A corrugated sheet manufacturing apparatus comprising: a scorer that marks a corrugated sheet along a sheet conveying direction; and a slitter that is provided downstream of the scorer in the sheet conveying direction and cuts the corrugated sheet along the sheet conveying direction. A cardboard sheet skew detection method for detecting the skew of the cardboard sheet in the slitter scorer of
First, a first position in the sheet width direction of the cardboard sheet is detected upstream of the scorer in the sheet conveyance direction, and a second position in the sheet width direction of the cardboard sheet is detected downstream of the slitter in the sheet conveyance direction. Detect the position,
Next, the skew amount detection method for the corrugated cardboard sheet, wherein the skew amount of the corrugated cardboard sheet is calculated based on the first position and the second position detected in the first step.

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