JP6043267B2 - Corrugated sheet manufacturing method - Google Patents

Description

The present invention relates to the production how of the cardboard sheet.

  The corrugated cardboard sheet is manufactured by an apparatus generally called a corrugator. In the corrugator, a single-faced corrugated sheet is manufactured by laminating a corrugated core and a back liner in a single facer, and a single-faced corrugated sheet and a front liner in a double facer, or multiple single-sided corrugated sheets. Are bonded to the front liner to produce a cardboard sheet such as a double-sided cardboard sheet or a double-sided cardboard sheet. The manufactured corrugated cardboard sheet is creased and grooved by a slitter scorer in parallel with the running direction, and then cut in a direction perpendicular to the flow direction by a predetermined length.

  Here, the core paper before being molded and the front and back liners (hereinafter collectively referred to as “base paper”) before being bonded are base paper holding devices (mill roll stands) that hold the base paper in a roll state. Are fed out to be supplied to a single facer or a double facer. When the roll of base paper is nearing the end, or when changing to a base paper with a different paper width, basis weight, etc., due to the change in the lot of cardboard sheets to be manufactured, the automatic splicing device (auto splicer) performs the splicing. Is called.

  In the base paper hanging device, rolls of a base paper currently being supplied (hereinafter referred to as “current base paper”) and a replacement base paper to be supplied next (hereinafter referred to as “new base paper”) can be rotated by a pair of arms, respectively. It is pinched. The pair of arms can move away from each other along the support shaft so as to correspond to the paper width of the base paper and slide in the same direction along the support shaft to move the feed position of the base paper.

  In the automatic splicing device, as shown in FIG. 5, the new base paper 4 waiting in a state where the double-sided tape 15 is stuck on one side of the tip and the opposite side is sucked and held by the splice head 11 is spliced. After pressing and adhering to the current base paper 3 with the head 11, the current base paper 3 is cut by the cutter 12 to perform paper splicing. A plurality of rollers 14 are arranged on the downstream side of the splice head 11, and the traveling path of the wound current base paper 3 is folded into ninety-nine folds. At the time of paper splicing, the base paper retained by the movement of the roller 14 is sent to the downstream side to stop the current base paper 3 at the splicing position without stopping the supply of the base paper to the single facer or the double facer. Put it in a state.

  At the time of this splicing, the positioning of the current base paper and the new base paper is conventionally performed by setting the position of the new base paper set in the splice head and waiting at the splicing position to the position of the current base paper currently running. It was.

  However, the running position of the current base paper may always fluctuate. For example, corrugated cardboard sheets are manufactured while running a sheet material such as a core, back liner, front liner base paper or single-sided corrugated cardboard sheet at a high speed for a long distance, so the running direction of the base paper or sheet material is shifted in the width direction. Therefore, in a single facer or a double facer, so-called “ear misalignment” may occur in which the edge of the base paper to be bonded is displaced. In such a case, conventionally, an operator who has confirmed the ear misalignment slides a pair of arms holding the roll of the current base paper along the support shaft with the base paper hanging device, so It was common to adjust the position of the base paper. Therefore, the position at which the current base paper is fed changes every time the adjustment is made. In recent years, the manufacture of corrugated cardboard sheets has been made in a variety of types and in small lots, and one roll may be used in a plurality of times. In this case, the winding of the roll is loosened, so that winding unevenness called a bamboo shoot state is likely to occur, and even if the holding position of the roll in the base paper hanging device does not change, the position where the current base paper is fed out as the current base paper is fed out Moving. Therefore, even when the position of the new base paper is adjusted to the position of the current base paper when the new base paper is set on the splice head, the position where the current base paper is fed out from the base paper stacking device after that changes to the current base paper. In some cases, the new base paper is spliced in a state of being shifted in the width direction.

  Further, conventionally, a control for aligning the center of the new base paper with the machine center of the base paper hanging apparatus at the time of paper splicing has been proposed (see Patent Document 1). This is to measure the width of the roll from the time it takes to receive the laser beam irradiated to the end of the roll when sandwiching the roll of the new base paper on the base paper hanging device, and calculate the center in the width direction of the calculated roll. It matches the machine center. However, as described above, the position where the current base paper is fed out from the base paper stacking device may always change, so even if only the new base paper has its center aligned with the machine center of the base paper stacking device, Therefore, it is impossible to prevent the new base paper from being spliced in a state of being shifted in the width direction.

  If the paper is spliced with the current base paper and the new base paper being shifted, a defective product may be generated downstream of the manufacturing process. Specifically, in the single facer, the bonding position between the center core and the back liner is shifted, or in the double facer, the bonding position between the single-sided cardboard sheet and the front liner is shifted, and the edges are not aligned. Generally, in order to ensure the dimensional accuracy in the width direction of the corrugated cardboard sheet, a drop margin for cutting off both ends (slit processing) is set in advance, but when the uneven width at the edge exceeds the drop allowance The corrugated cardboard of that part becomes a waste object and is a great waste.

  In addition, when slitting is performed in accordance with a (preprint) slit mark printed in advance on the front liner, if the new base paper of the front liner is spliced in a state shifted in the width direction with respect to the current base paper, When the new base paper is slit by a slit blade aligned with the slit mark of the base paper, the slit processing position is shifted and becomes a defective product. In addition, processing called liner cut may be applied to the back liner before being supplied to the single facer. This is a process frequently applied to a cardboard sheet for a cardboard box that contains a beverage, and a perforation for unpacking the cardboard box is formed on the back liner before bonding. Also in this case, when the new base paper of the back liner is spliced in a state shifted in the width direction with respect to the current base paper, the position of the liner cut is set based on the position in the width direction of the current base paper, The position of the liner cut in the new base paper is shifted and becomes defective.

JP 2001-39592 A

The present invention has been made in view of the above circumstances, it is possible to splicing the base paper by reducing the deviation in the width direction, of the cardboard sheet which can enhance the bonding and machining accuracy downstream manufacturing how Providing is an issue.

In order to solve the above-described problems, a method for manufacturing a corrugated cardboard sheet according to the present invention is described as follows: “The current base paper currently supplied from the base paper hanging device for the manufacture of the corrugated cardboard sheet and the next new base paper to be supplied are joined. upon splicing to match, the running position of the current sheet in the paper splicing position, to always match the standby position of the new fiberboard are waiting for paper splicing, splicing for adjusting the travel position of the current sheet in the width direction A position adjusting step, and a pre-bonding position adjusting step in which the running position of the base paper before the base papers or one or more single-sided cardboard sheets and base paper are pasted together is adjusted in the width direction.

  The meanings of “base paper”, “current base paper”, and “new base paper” are the same as those defined in the description of the background art. “Base papers or one or more single-sided cardboard sheets and base paper are bonded” means that a single-sided cardboard sheet is formed by bonding a back liner to the corrugated core. It means that the front liner is bonded to form a double-sided cardboard sheet, and that the front liner is bonded to two or more single-sided cardboard sheets to form a double-sided cardboard sheet or a double-sided cardboard sheet. Yes.

  In the present invention, the paper base alignment is adjusted so that the current base paper traveling position always matches the new base paper standby position, as opposed to the conventional method in which the new base paper standby position is aligned with the current base paper traveling position. To do. For example, when the position where the current base paper is fed from the base paper stacking device varies in the width direction due to uneven winding of the current base paper roll, the travel position of the current base paper is adjusted to coincide with the standby position of the new base paper. For this reason, the position of the current base paper may fluctuate after alignment for paper splicing. There is no deviation.

  And, in the present invention, when a deviation in the width direction occurs in the running direction of the base paper on the downstream side where the base papers or one or more single-sided cardboard sheets and the base paper are bonded, unlike the conventional case, the base paper hanging device The travel position is not adjusted retroactively to the feed position of the current base paper. When the shift | offset | difference of the width direction arises in the running direction of a base paper downstream, in this invention, the running position of the base paper before bonding is adjusted in the position adjustment process before bonding. This makes it possible to adjust the position of the current base paper traveling position to always match the standby position of the new base paper in the paper splicing position adjustment step. In other words, in the present invention, the position adjustment in the width direction on the downstream side is replaced with the adjustment of the paper splicing position at the source stream, so that the running position of the current base paper matches the standby position of the new base paper. Is adopted.

  In addition, by adjusting the deviation in the width direction of the base paper on the downstream side in the position adjustment process before pasting, it is pasted after the running position is adjusted compared to the case of adjusting at the feeding position from the base paper hanging device. The travel distance of the base paper is shorter. Therefore, the further position shift accompanying driving | running | working reduces, and while the bonding precision in the case of bonding improves, the length of the sheet | seat material used as defect can be reduced significantly.

Method for manufacturing a corrugated cardboard sheet according to the present invention having the above structure, "the paper splicing position adjustment step, using a camera to shoot the respective end sides of both the current base paper traveling paper splicing position, current sheet Each of the two sides of the paper is photographed with the camera in the same field of view as the edge of the new raw paper in the standby position, which is an arbitrary position in the shooting range of the camera. A detection process for detecting the running position of the current raw paper at the splicing position together with the standby position of the new raw paper, and a shift amount in the width direction of the running position of the current raw paper based on the standby position of the new raw paper based on the detection in the detection process Is calculated for both sides, and the current base paper feed position in the base paper stacking device is moved in the width direction so that the same amount of deviation is included even when the amount of deviation on both ends is zero. And paper moving step comprises a "is intended.

The “deviation amount” indicates a distance by which the travel position of the current raw paper at the paper splicing position is shifted in the width direction with reference to the standby position of the new raw paper. Serving as a reference standby position new web detects the running position of the current sheet in the "detection step" above the desired position.

Shift amount of the "calculation" is that out calculation based on the detection sides of both ends of the current sheet. In this case, when the amount of deviation from the edge of the new base paper matches at both ends, the center of the new base paper matches the center of the current base paper. Can do. Even if the paper width of the new base paper is the same as that of the current base paper, the center of the new base paper and the center of the current base paper are made to coincide even if the paper width is slightly different due to the difference in lot or shrinkage of the paper. If so, precise alignment can be performed.

Next, a manufacturing apparatus that uses the method for manufacturing a corrugated cardboard sheet according to the present invention is as follows: "From a base paper hanging apparatus that rotatably sandwiches a roll of base paper between a pair of arms that respectively slide along a support shaft. A detection device that detects the running position at the splicing position of the current base paper being supplied, and a standby position where the next new base paper to be supplied is held by the splice head and is waiting for splicing with the current base paper Is used as a reference to calculate the amount of deviation in the width direction of the travel position of the current base paper detected by the detection device, and based on the amount of deviation, the pair of arms are slid in the same direction along the support shaft. The current base paper movement control unit that moves the holding position of the roll of the current base paper in the base paper hanging device, and the travel position of the base paper before the base papers or one or more single-sided cardboard sheets and base paper are bonded together, Includes a position adjusting device before bonding adjusted in direction "is intended.

  “Detecting device that detects the running position of the current base paper at the splice position” includes a camera that captures the edge side of the base paper, and projects reflected light or transmitted light by projecting light such as visible light or infrared light. Examples include a photoelectric sensor that detects the presence or absence of a paper, and an ultrasonic sensor that detects the presence or absence of a base paper by irradiating an ultrasonic wave and receiving a reflected wave or a transmitted wave.

  As the “position adjustment device before bonding”, the traveling direction of the base paper is moved in the width direction by winding the traveling base paper around the long bar-shaped member and tilting the axial direction of the long bar-shaped member with respect to the traveling direction of the base paper. An apparatus can be used, and a free roller or a non-rotating bar can be used as the long bar-like member.

  By using the corrugated cardboard sheet manufacturing apparatus of the present configuration, the deviation in the width direction between the new base paper that is spliced and the current base paper is reduced using the corrugated cardboard sheet manufacturing method described above, and the laminated sheet Corrugated cardboard sheets in which the deviation in the width direction of the material is reduced can be manufactured.

As described above, as an effect of the present invention, it is possible to splicing the base paper by reducing the deviation in the width direction, the production how of the cardboard sheet which can enhance the bonding and machining accuracy downstream, Can be provided.

It is the (a) front view and (b) side view of the automatic paper splicing device, the detection device, and the base paper hanging device in the manufacturing apparatus using the manufacturing method of the corrugated board sheet which is one embodiment of the present invention. It is a top view of the base paper hanging apparatus of FIG. It is explanatory drawing of the imaging data acquired with the detection apparatus of FIG. It is a perspective view of the position adjustment apparatus before bonding in the manufacturing apparatus using the manufacturing method of the corrugated cardboard sheet which is one embodiment of the present invention. 2A is a front view of an automatic paper splicing device and a base paper hanger, and FIG. 2B is an enlarged view of a range A. FIG.

  Hereinafter, a corrugated cardboard sheet manufacturing method according to an embodiment of the present invention (hereinafter, simply referred to as “manufacturing method”), and a corrugated cardboard sheet manufacturing apparatus using the manufacturing method (hereinafter simply referred to as “manufacturing apparatus”). Will be described with reference to FIGS. 1 to 4.

  In the manufacturing method of the present embodiment, when the current base paper 3 that is currently supplied from the base paper hanger 20 and the new base paper 4 that is supplied next are spliced together to manufacture a corrugated cardboard sheet, A splicing position adjustment step for adjusting the traveling position of the current base paper 3 in the width direction so that the travel position of the current base paper 3 always coincides with the standby position of the new base paper 4 waiting for paper splicing; Alternatively, it includes a pre-bonding position adjusting step of adjusting the running position of the base paper before the one or more single-sided cardboard sheets and the base paper are bonded in the width direction.

  In the manufacturing method of the present embodiment, the paper splicing position adjustment step includes a detection step of detecting the travel position of the current raw paper 3 at the splicing position, and a standby position of the new raw paper 4 from the detected travel position of the current raw paper. And a current base paper moving step of calculating the feed position of the current base paper 3 in the base paper hanging device 20 in the width direction based on the base offset.

  The manufacturing apparatus of this embodiment used in such a manufacturing method is obtained by adding several configurations to a corrugator generally used for manufacturing a corrugated cardboard sheet. Here, a general corrugator is a single facer that forms a core base paper supplied from the base paper hanging device 20 into a corrugated shape and is bonded to a back liner supplied from the base paper hanging device 20 to form a single-sided cardboard sheet, One or more single-sided cardboards formed with a single facer are bonded to a front liner supplied from the base paper hanger 20 to form a double facer or sheet material such as a double-sided cardboard sheet, and the sheet material is cut parallel to the running direction. A slitter scorer that performs ruled line insertion, a cutter that cuts a sheet material in the width direction by a predetermined length, and a base paper supplied from the base paper hanging device 20 to a single facer or a double facer, a splicing from the current base paper 3 to the new base paper 4 And an automatic paper splicer 10 for performing the above. In addition, a general corrugator is equipped with a bridge that adjusts the timing at which a single-sided cardboard sheet is sent to the double facer, and a preheater that heats the base paper before it is supplied to the single facer and double facer. In some cases, a liner cutting device for forming a perforation in the back liner before being formed is further provided.

  The configuration of the manufacturing apparatus of the present embodiment additionally provided for a general corrugator is a detection apparatus that detects the traveling position of the current base paper 3 that is currently supplied from the base paper hanging apparatus 20, and is then supplied. The deviation of the running position of the current raw paper 3 detected by the detection device in the width direction with reference to the standby position where the new raw paper 4 is held by the splice head 11 and is waiting for splicing with the current raw paper 3 The amount d is calculated, and based on the deviation amount d, the pair of arms 21 are slid in the same direction along the support shaft 23 to move the current holding position of the roll of the current base paper 3 in the base paper hanging device 20. This is a pre-bonding position adjusting device 30 that adjusts the running position of the base paper in the width direction before the base paper movement control unit, base papers or one or more single-sided cardboard sheets and base paper are pasted together.

  The above-described additional configuration and the configuration related to the above-described additional configuration, which is a configuration of a general corrugator, will be described in more detail. First, as shown in FIGS. 1 and 2, the base paper hanging apparatus 20 includes a pair of arms 21 that are pivotally supported by a machine base 24 so as to be rotatable by a support shaft 23. Is protruded toward the other arm 21 and is provided with a chucking head 22 that is rotatably inserted into the center of the base paper roll. The base paper hanging device 20 includes an arm driving device (not shown) that slides the pair of arms 21 along the support shaft 23. The base paper hanging device 20 includes two base paper feeding sections 25 each having a single support shaft 23 and a pair of arms 21 to feed the current base paper 3 and hold the new base paper 4 for the next feeding. And alternately.

  As shown in FIG. 1, the automatic paper splicing device 10 is located above the base paper hanging device 20, and has a pair of splice heads 11 and a plurality of rollers that guide the traveling base paper downstream of the splice heads 11. 14 and a cutter 12 for cutting the current raw paper 3 after the paper splicing. The pair of splice heads 11 respectively correspond to the two base paper feeding portions 25 of the base paper hanging device 20, and when the base paper feeding portion 25 located below holds the roll of the new base paper 4, the new splicing head 11 is pulled out from the roll. The end of the base paper 4 is held. The splicing head 11 pulls out the new base paper 4 from the roll and presses the splicing head 11 against the current base paper 3 that is running to set the end of the splicing head 11 to suck and hold the end portion of the splicing head 11. 4 is displaced between a paper splicing position where 4 is bonded to the current base paper 3 and a standby position where it waits for paper splicing in the vicinity of the paper splicing position. FIG. 1 illustrates a case where the splice head 11 holding the new base paper 4 is in the standby position. In addition, the plurality of rollers 14 normally stretch the current base paper 3 between the rollers 14 so that the current base paper 3 travels in a ninety-nine fold shape. Then, the tension of the current base paper 3 is lowered between the rollers 14 to be retained.

  In this embodiment, a camera 40 is used as the detection device. The camera 40 is installed on the mount 13 of the automatic paper splicer 10 at a position where the current raw paper 3 running at the paper splicing position is photographed from below. In the present embodiment, a pair of cameras 40 are used, and one camera 40 captures one end side of the current base paper 3 and the other camera 40 captures the other end side of the current base paper 3. In this embodiment, when photographing the edge side of the current raw paper 3, the edge side of the new raw paper 4 at the standby position is photographed in the same field of view.

  A current base paper movement control unit (not shown) extracts, as a functional configuration, the edge of the current base paper 3 at the splicing position based on detection by the detection device, A deviation amount calculating means for calculating a deviation amount d based on the position of the edge of the new raw paper 4 at the standby position, and the holding position of the roll of the current raw paper 3 in the raw paper loading device 20 from the calculated deviation amount d. Arm driving means for calculating a distance to be moved in the width direction, converting the arm driving device to a signal for operating the arm driving device in order to move the arm by the distance, and sending the converted signal to the arm driving device. .

  In this embodiment, a computer and a programmable controller are provided as the hardware configuration of the current raw paper movement control unit. The computer includes a main storage device, a central processing unit (CPU), and an auxiliary storage device. The main storage device stores a program that causes the computer to function as a deviation amount calculation unit. Here, the extraction of the edge can be performed based on the luminance value, the color component, and the like of the pixel of the imaging data 50 by image processing of the imaging data 50 captured by the camera 40. The shift amount d can be calculated from the position information (pixel coordinates) of the extracted current raw paper 3 and new raw paper 4.

  The microprocessor of the programmable controller (PLC) stores a program for causing the PLC to function as arm driving means, and the same pair of arms 21 along the support shaft 23 in the base paper hanging device 20 is based on the shift amount d. The distance to be slid in the direction is calculated and converted into a signal to be given to the arm driving device for that purpose. Specifically, a general corrugator base paper hanging device 20 sends a pulse signal corresponding to the time during which the operation button is pressed to the arm drive device by manually pressing the operation button, thereby the arm drive device. Employs a configuration in which the arm 21 is slid along the support shaft 23. Therefore, the distance from which the arm 21 should be slid along the support shaft 23, which is obtained from the shift amount d, is converted into a pulse signal corresponding to the time during which the arm driving device should drive the arm. Then, the converted pulse signal is sent to the arm drive means instead of the signal generated when the operation button is pressed.

  As shown in FIG. 4, the pre-bonding position adjusting device 30 supports the first long bar-shaped member 31 and the second long bar-shaped member 32 in parallel with an interval, and the first long bar-shaped member 31 and the second long bar. Through a rotation support part 75 that allows the first long bar-shaped member 31 and the second long bar-shaped member 32 to rotate around a virtual point P located between the bar-shaped members 32, and the rotation support part 75, The first long bar-shaped member 31 and the gantry 60 that supports the second long bar-shaped member 32 at a position higher than the installation surface are provided. Further, the pre-bonding position adjusting device 30 detects downstream side detection for detecting the travel position of the base paper or the travel position of the sheet material after pasting the base papers or one or more single-sided cardboard sheets and the base paper. The first long rod-shaped member 31 and the second long rod-shaped member 32 are rotated about the virtual point P by driving the rotation support portion 75 based on the detection of the device (not shown) and the downstream detection device. A rotation control unit (not shown) is provided. The pre-bonding position adjusting device includes an upstream guide roller that guides the base paper that has traveled from the upstream to the first long bar-shaped member, and a downstream guide that determines the travel direction of the base paper downstream from the second long bar-shaped member. It can be set as the structure which comprises a roller. The pre-bonding position adjusting device 30 in FIG. 4 is an example including an upstream guide roller 61. Further, in FIG. 4, in order to clearly show the configuration, a part of the gantry 60 is notched.

  Here, as the first long bar-shaped member 31 and the second long bar-shaped member 32, a free roller or a non-rotating bar can be used, respectively. In the case of a non-rotating bar, a hollow or solid round bar shape, a cross-sectional circle It can be arcuate.

  In the above-described configuration, the gantry 60 is a substantially rectangular parallelepiped frame body including a plurality of columns 68 standing on the installation surface and a plurality of horizontal members 69 extending horizontally between the columns. Within the pair of frames facing each other on the gantry 60, the vertical frame 70 is vertically stretched between the upper and lower horizontal members 69.

  The rotation support portion 75 extends at a right angle in a different direction from a pair of parallel base plates 62 and both ends of each of the base plates 62, and extends to end portions on the same side of the pair of base plates 62. And two ends of the first long bar-shaped member 31 and the second long bar-shaped member 32 in the same direction are connected to each other via the connection bar 73. 62 are connected. Each of the pair of base plates 62 faces the pair of vertical members 70. In addition, the rotation support unit 75 includes a pair of rails 63 having an arc shape that is a part of a circle centered on the virtual point P, and a pair of sliders 64 that slide along the rails 63. A rail 63 is attached to a portion of each of the pair of vertical members 70 facing the base plate 62, and a slider 64 is attached to each of the pair of base plates 62. The slider 64 may be attached to the longitudinal member 70 and the rail 63 may be attached to the base plate 62.

  Further, the rotation support portion 75 includes a cylinder device 65 that is operated by air or hydraulic pressure, and the cylinder portion side is attached to an attachment piece 66 protruding from one of the pair of vertical members 70 around the shaft 71. It is pivotally supported. The tip of the piston rod of the cylinder device 65 is pivotally supported around a shaft 72 by a mounting piece 67 projecting from one of the pair of base plates 62. With this configuration, as the piston rod of the cylinder device 65 advances and retreats, the pair of base plates 62 rotate while sliding the slider 64 along the rail 63, and accordingly, the first long bar member 31 and the second long bar shape The member 32 rotates around the virtual point P.

  As the “downstream side detection device”, in the present embodiment, a camera that shoots the base paper before the base papers or one or more single-sided corrugated cardboard sheets and the base paper or the edge side of the post-bonding sheet material is used. I use it. In addition, you may use the photoelectric sensor and ultrasonic sensor which detect the edge of the base paper before bonding as a downstream detection apparatus.

  The rotation control unit, as a functional configuration, calculates a distance to move the base paper before pasting in the width direction in order to correct the positional deviation in the width direction based on detection by the downstream side detection device. Then, an angle at which the first long bar-shaped member 31 and the second long bar-shaped member 32 are to be rotated is calculated from the calculated distance, and a length and a direction in which the piston rod is advanced and retracted from the calculated angle (forward / reverse) And a rotation control means for controlling the cylinder device 65 based on this.

  The rotation control unit includes a computer and a programmable controller as a hardware configuration. The computer includes a main storage device, a central processing unit (CPU), and an auxiliary storage device. The main storage device stores a program that causes the computer to function as movement distance calculation means. A program that causes a computer to function as a moving distance calculation unit is a program that performs image processing on imaging data captured by a camera, and extracts the edge of the base paper before bonding or the edge of the base paper in the sheet material after bonding. In order to align the edge of the base paper to the reference position (for example, a position corresponding to half the paper width from the center of the machine such as a single facer or double facer), the width of the base paper before pasting Calculate the distance to move in the direction.

In addition, the microprocessor of the programmable controller (PLC) stores a program that causes the PLC to function as rotation driving means. In addition, the relationship between the rotation angle θ of the first long bar-shaped member and the second long bar-shaped member and the movement distance D in the width direction of the base paper is first with respect to the traveling direction of the base paper downstream from the second long bar-shaped member. When the angle at which the long bar-shaped member is inclined is α and the distance between the outer peripheral surfaces of the first long bar-shaped member and the second long bar-shaped member is L, the following formula is used.
D = sin θ (L− (cos α) L)

  The pre-bonding position adjusting device 30 of the present embodiment is used for the purpose of not transmitting the rotation of the free roller to the base paper when the first long bar-shaped member 31 and the second long bar-shaped member 32 are free rollers, or When the first long bar-shaped member 31 and the second long bar-shaped member 32 are non-rotating bars, the first long bar-shaped member 31 and the second long bar-shaped member 32 are used for the purpose of reducing friction between the non-rotating bar and the base paper. It can be set as the structure provided with the feed roller in the upstream. Moreover, the position adjustment apparatus 30 before bonding can be set as the structure provided with the brake for not making the tension | tensile_strength of the base paper wound around the 1st long bar-shaped member 31 and the 2nd long bar-shaped member 32 too small.

  Next, the paper splicing position adjusting step and the pre-bonding position adjusting step in the method for manufacturing a corrugated cardboard sheet using the manufacturing apparatus having the above configuration will be described.

  When splicing, the tip of the new base paper 4 pulled out from the roll held between the pair of arms 21 in the base paper hanging device 20 in the state where the splice head 11 is moved to the set position in advance is applied to the splice head 11. Adsorb. Then, after the double-sided tape 15 (see FIG. 5B) is attached to the surface of the new base paper 4 opposite to the surface attracted to the splice head 11, the splice head 11 is moved to the standby position.

  In a state where the new base paper 4 is in the standby position, the vicinity of both sides in the width direction of the current base paper 3 and the new base paper 4 is always photographed by the pair of cameras 40 (“detection step”).

  The imaging data 50 captured by the pair of cameras 40 is sent to the current base paper movement control unit, and the edge calculation unit extracts the respective edges of the current base paper 3 and the new base paper 4 as shown in FIG. A deviation d of the position in the width direction of the current raw paper 3 with reference to 4 is calculated. Here, FIG. 3 illustrates one of the imaging data 50 captured by the pair of cameras 40. If the shift amount d is zero on both side edges, the current base paper 3 and the new base paper 4 match in the width direction. Further, when the paper widths of the current raw paper 3 and the new raw paper 4 are different, the centers in the width direction of the current raw paper 3 and the new raw paper 4 coincide with each other if the shift amount d on both sides is the same. Next, the arm driving means calculates a distance to move the arm based on the shift amount d, and converts it to a signal corresponding to the time for operating the arm driving device to move the arm 21 by that distance. By sending this signal to the arm driving device of the base paper hanging device 20, the pair of arms 21 sandwiching the roll of the current base paper 3 moves in the same direction along the support shaft 23 (current base paper moving step). ).

  As described above, in the splicing position adjustment process of the present embodiment, the traveling position of the current base paper 3 is always detected, and when a deviation occurs with reference to the standby position of the new base paper 4, the process of correcting it is repeated. As a result, a state where the traveling position of the current base paper 3 at the paper splicing position matches the standby position of the new base paper 4 is always maintained. Therefore, regardless of when and at what timing, the current original paper 3 and the new original paper 4 can be connected without causing a deviation in the width direction.

  And when the position shift of the width direction arises in the base paper which runs downstream, the position shift is eliminated by performing the position adjustment process before pasting. Specifically, the pre-bonding position adjusting device 30 is arranged immediately upstream of the single facer or the double facer, and as shown in FIG. 4, the base paper that has traveled from the upstream (in FIG. 4, the current base paper 3 is illustrated) The first long bar-shaped member 31 and the second long bar-shaped member 32 are passed through the space between the first long bar-shaped member 31 and the second long bar-shaped member member 32 in contact with the respective outer peripheral surfaces in this order. Drive downstream.

  The downstream side detection device always detects the edge of the base paper before being bonded or the sheet material after being bonded. Based on the detection, when the distance to move the base paper before pasting in the width direction is calculated by the movement distance calculation means of the rotation control device, the first long bar-shaped member 31 and the second long The length and direction in which the piston rod of the cylinder device 65 should be advanced and retracted are calculated via the angle at which the rod-shaped member 32 should be rotated, and the cylinder device 65 is controlled based on this.

  When the piston rod of the cylinder device 65 advances and retreats, the first long bar-shaped member 31 and the second long bar-shaped member 32 rotate around the virtual point P via the rotation support portion 75 and are wound around these. The traveling direction of the current raw paper 3 that is traveling is displaced in the width direction, and the positional deviation in the width direction is corrected. Thereby, in a single facer and a double facer, base papers or one or more single-sided corrugated cardboard sheets and base paper can be bonded together with reduced displacement in the width direction.

  By performing such a pre-bonding position adjustment step, the travel position is adjusted retroactively to the feed position of the current base paper 3 from the base paper hooking device 20 even if a position shift in the width direction occurs on the downstream side. Therefore, a paper splicing position adjustment process in which the running position of the current base paper 3 is always matched with the standby position of the new base paper 4 at the paper splicing position is possible. Therefore, the current base paper 3 and the new base paper 4 are shifted in the width direction. It is possible to reduce the number of sheets and to perform paper splicing.

  The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to the above-described embodiments, and various improvements can be made without departing from the scope of the present invention as described below. And design changes are possible.

  For example, in the above-described embodiment, the case where the current base paper movement control unit includes a computer and a programmable controller as a hardware configuration is illustrated. However, the present invention is not limited to this, and a single computer is configured with a deviation amount calculation unit and arm drive. It can also be configured to function as a means. The same applies to the rotation control unit similarly exemplarily including a computer and a programmable controller.

  In addition, in said embodiment, although the manufacturing apparatus and manufacturing method which perform position adjustment of the width direction in a downstream by the position adjustment apparatus before bonding were illustrated, in addition to the position adjustment apparatus before bonding, after bonding The present invention can be applied to a manufacturing apparatus and a manufacturing method provided with an apparatus for adjusting the position of the sheet material in the width direction.

3 Current base paper 4 New base paper 11 Splice head 20 Base paper hooking device 21 Arm 23 Spindle 30 Position adjustment device before bonding d Shift amount

Claims (1)

When splicing the current base paper currently supplied from the base paper hanger for the production of corrugated cardboard and the new base paper to be supplied next, the travel position of the current base paper at the splicing position is used for splicing. to match at all times and a standby position of the new web which is waiting for the splicing position adjustment step of adjusting the travel position of the current sheet in the widthwise direction,
Position adjustment step before bonding for adjusting the running position of the base paper in the width direction before the base papers are bonded to each other or one or more single-sided cardboard sheets and base paper;
Comprising
The paper splicing position adjustment step includes
Use a camera that captures both sides of the current base paper that travels through the splicing position, and places both ends of the current base paper in the standby position, which is an arbitrary position in the camera's shooting range. A detection step of detecting the running position of the current raw paper at the splicing position together with the standby position of the new raw paper by photographing with the camera in the same field of view and on the edge side in the same direction of the new raw paper,
Based on the detection in the detection step, the shift amount in the width direction of the running position of the current base paper with respect to the standby position of the new base paper is calculated for both end sides, including the case where both end side shift amounts are zero. A current base paper moving step of moving the feed position of the current base paper in the base paper hanging device in the width direction so as to have the same deviation amount,
A method for producing a corrugated cardboard sheet, comprising:

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