JP5740340B2 - Sheet material position adjustment method - Google Patents

Description

The present invention provides a cardboard sheet production line, it relates to a position adjusting how the sheet material for adjusting the position in the width direction of the traveling sheet material.

  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. And a front liner are bonded to produce a cardboard sheet such as a double-sided cardboard sheet and 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.

  The above process is performed while running a sheet material such as a core, a liner, a single-sided cardboard sheet, and a double-sided cardboard sheet, but the position where the sheet material travels shifts in the width direction (direction perpendicular to the running direction). , Malfunctions may occur. For example, if the sheet material before pasting shifts in the width direction, the end sides in the width direction may become uneven between the pasted sheet materials. Generally, in order to ensure the dimensional accuracy in the width direction of the corrugated cardboard sheet, a drop allowance for cutting off both ends is set in advance, but if the uneven width at the edge exceeds the drop allowance, Corrugated cardboard is a waste subject and is a great waste. Further, if the sheet material is shifted in the width direction upstream of the slitter scorer, ruled lines and grooving are performed at the shifted position, and the size of the manufactured cardboard blank becomes inaccurate.

  Therefore, conventionally, as a method and apparatus for adjusting the position in the width direction in which the sheet material travels, the sheet material is sandwiched between an upper wheel and a lower wheel that are rotatable around an axis parallel to the sheet material, and the upper wheel and the lower wheel. Has been proposed and implemented (see Patent Document 1). In this technique, the upper wheel and the lower wheel are rotated by a common drive device. According to this technique, while rotating the upper and lower wheels freely following the traveling of the sheet material, and rotating around the axis perpendicular to the sheet material, the relative traveling direction of the wheel with respect to the sheet material is determined. The sheet material can be moved in the width direction by tilting from the traveling direction.

  However, in the above-described conventional technology, since the upper and lower wheels are swung by a common drive device, there is a problem that the device becomes large and the control becomes complicated and the cost is increased.

  On the other hand, there is also a device that moves the sheet material in the width direction by pressing only the upper wheel against the sheet material traveling on the support plate without providing the lower wheel, and turning the upper wheel around an axis perpendicular to the sheet material. It has been proposed (see Patent Document 2). According to this, the configuration of the apparatus becomes simple, but the traveling direction of the sheet material must be changed only by the force applied from the upper wheel. Therefore, there is a problem that the upper wheel needs to be strongly pressed against the sheet material, and the sheet material is easily crushed. Since the corrugated cardboard sheet exhibits cushioning properties due to the corrugated core, the corrugated cardboard sheet whose corrugated core is crushed is discarded as a defective product.

Therefore, in view of the above circumstances, the present invention can easily adjust the position in the width direction of the sheet material traveling on the corrugated board production line, and adjust the position of the sheet material that can suppress the collapse of the sheet material. the provision of the square method, which is intended to be a challenge.

In order to solve the above problems, a method for adjusting the position of a cardboard sheet according to the present invention,
"The sheet material position adjustment method for adjusting the position in the width direction of the sheet material traveling in the corrugated cardboard production line without using a guide plate that slide-contacts the side of the sheet material,
The supporting surface for supporting the sheet material from below, and to travel the sheet material along the sheet support base having an opening for communicating the upper and lower space part of the support surface,
A drive wheel that is rotatable about an axis parallel to the support surface, and is rotatable about an axis perpendicular to the support surface by driving of a rotation drive device; and rotatable about an axis parallel to the support surface; With a free wheel rotatable around an axis perpendicular to the support surface, the sheet material is sandwiched from above and below in the open portion,
Based on the detection of the position in the width direction of the sheet material, to calculate the displacement in the width direction of the sheet material,
If the sheet material is not misaligned in the width direction, the drive wheel and the universal wheel can be moved with respect to the sheet material without rotating the drive wheel about an axis perpendicular to the support surface. Roll in a state where the rolling direction matches the traveling direction of the sheet material flowing in from the upstream side,
If the sheet material is displaced in the width direction, the driving wheel is driven around the axis perpendicular to the support surface by a predetermined angle by driving the rotation driving device based on the calculated position displacement in the width direction. Moving the sheet material in the width direction by tilting the rolling direction of the drive wheel relative to the sheet material with respect to the traveling direction of the sheet material flowing in from the upstream side ,
Following the movement of the sheet material in the width direction, the rolling wheel is rotated about an axis perpendicular to the support surface behind the rotation of the drive wheel, thereby changing the rolling direction relative to the sheet material. The drive wheel and the universal wheel are matched .

  “Sheet material” includes front / back liner, corrugated core, single-sided corrugated cardboard sheet, double-sided corrugated cardboard sheet, and sheet with front-liner bonded to two or more layers. pointing.

  The “support surface” for supporting the sheet material from below can be constituted by the upper surface of the plate on which the sheet material that is driven by a feed roller or the like is placed and slid, or the upper surface of the conveyor that conveys the sheet material. The “open portion” can be formed by dividing the support surface into an upstream side and a downstream side to provide a gap. Alternatively, the open portion can be formed by dividing the support surface to the left and right and providing a gap in the central portion. Alternatively, the open portion can be formed by providing a through hole in a part of the support surface.

  The “drive wheel” and the “universal wheel” may be singular or plural. Note that the drive wheel and the universal wheel sandwich the sheet material from above and below, but the drive wheel is disposed above the sheet material and the universal wheel is disposed below the sheet material, and vice versa. Also good.

  The “rotation drive device” is a drive device that can rotate a drive wheel in a forward / reverse direction by a desired angle around an axis perpendicular to a support surface (hereinafter sometimes simply referred to as “vertical axis”). A servo motor or a stepping motor can be used.

  In the present invention, the sheet material is sandwiched from above and below by a drive wheel and a free wheel that can rotate around an axis parallel to the support surface (hereinafter sometimes simply referred to as “parallel axis”). Hereinafter, when it is not necessary to distinguish between the drive wheel and the universal wheel, they are simply referred to as “wheels”. When the upper and lower wheels are not rotated around the vertical axis, in other words, when the rolling direction of the wheel relative to the sheet material coincides with the traveling direction of the sheet material flowing in from the upstream side The position in the width direction in which the cardboard sheet travels does not change between the upstream side and the downstream side of the wheel. And when moving a sheet | seat material in the width direction, in this invention, only the driving wheel which is one of the wheels which clamp a sheet | seat from the upper and lower sides is rotated to the surroundings of a vertical axis. Thereby, the force which moves to the width direction acts with respect to a sheet | seat material from a drive wheel. At this time, since the sheet material is sandwiched from above and below by the wheel, the sheet material is not easily slipped in a direction other than the direction in which the force is applied from the driving wheel, and the force acting from the driving wheel is efficiently transmitted to the sheet material with high responsiveness. The sheet material can be moved in the width direction. In addition, since the sheet material is sandwiched from above and below by the wheel, the sheet material can be moved in the width direction without strongly pressing the sheet material in the drive hole, thereby reducing the possibility of the sheet material being crushed. can do.

  When the sheet material moves in the width direction, the free wheel that can rotate around the vertical axis rotates around the vertical axis following the movement of the sheet material, and the relative rolling direction of the free wheel with respect to the sheet material Corresponds to that of the drive wheel. In other words, the universal wheel rotates around the vertical axis behind the rotation of the drive wheel around the vertical axis. The present invention focuses on the fact that the sheet material can be moved in the width direction without any problem without synchronizing the rotation around the vertical axis of the wheel that sandwiches the sheet material from above and below, unlike the conventional idea. It has been made. Therefore, since there is no need for a mechanical structure for synchronizing the rotation of the upper and lower wheels and control for synchronizing, the lateral position of the sheet material can be obtained by a simple method using a device having a simple configuration. Can be adjusted.

In addition to the above configuration, the sheet material position adjustment method according to the present invention includes:
“In the line on which the sheet material travels, a slitter device for cutting the sheet material in parallel to the traveling direction is provided downstream of the drive wheel and the universal wheel,
Read the position of the cut mark previously attached to the sheet material as a position to cut the sheet material at right angles to the running direction with a detection device installed on the downstream side of the slitter device,
The position of the read cut mark is compared with the target position, and the rotation drive device is controlled to adjust the angle at which the drive wheel is rotated about an axis perpendicular to the support surface. .

  Conventionally, in order to make the sheet material grooving at an accurate position in the slitter device, when trying to adjust the position in the width direction of the sheet material, the position in the width direction of the sheet material on the “upstream side” of the slitter device. In general, the amount of movement of the sheet material in the width direction is adjusted based on this detection. On the other hand, a slitter apparatus that detects a shift in the width direction of a sheet material and moves in the width direction following the sheet material shifted in the width direction is often used in a corrugated board production line. In this case, since the sheet material further shifts in the width direction as the slitter device moves in the width direction, even if the position adjustment is performed based on the detection on the upstream side of the slitter device, the sheet material width direction The position of cannot be adjusted accurately.

  On the other hand, in the present invention, a configuration is adopted in which the position in the width direction of the sheet material is detected on the “downstream side” of the slitter device. Thereby, while using a conventional production line having equipment for moving the slitter device in the width direction, the drive wheel and the position of the sheet material in the width direction caused by the movement of the slitter device are offset. Since the sheet material can be moved in the width direction by the free wheel, the position in the width direction of the sheet material can be accurately adjusted.

  Here, the sheet material is often provided with a “slit mark” indicating a line to be grooved parallel to the traveling direction and a “cut mark” indicating a position to be cut at right angles to the traveling direction. When the sheet material flowing into the slitter device is shifted outward in the width direction, the inner slit mark is confirmed on the downstream side of the slitter device because the portion of the sheet material with the slit mark is cut off. I can't. On the other hand, since the cut mark is given in a certain length in the width direction of the sheet material, even if the sheet material flowing into the slitter device is shifted in the width direction, it is not completely cut off. In the present invention, since the object to be read by the detection device is a cut mark, the position in the width direction of the sheet material can be detected on the downstream side of the slitter device using the mark originally attached to the sheet material as an index.

Next, a corrugated cardboard sheet position adjusting apparatus used in the corrugated cardboard sheet position adjusting method according to the present invention includes:
“A support surface that supports a traveling sheet material from below, and a seat support base that includes an open portion that allows upper and lower spaces to communicate with each other at a part of the support surface;
A drive wheel that is rotatable about an axis parallel to the support surface and is rotatable about an axis perpendicular to the support surface by driving of a rotation drive device;
A free wheel rotatable around an axis parallel to the support surface and rotatable around an axis perpendicular to the support surface;
One of the drive wheel and the universal wheel is positioned above the seat support in the opening portion,
The drive wheel and the other of the universal wheel, the positioned sheet support base from below "can be made at the opening.

  With the sheet material position adjusting device of this configuration, the above-described sheet material position adjusting method can be used. In other words, the sheet material position adjusting device of the present configuration is capable of accurately adjusting the position of the sheet material in the width direction while suppressing the collapse of the sheet material, while having a simple configuration.

As described above, as an effect of the present invention, the position of the sheet material that can easily adjust the position in the width direction of the sheet material traveling in the corrugated board production line and can suppress the collapse of the sheet material. Law can be provided.

It is a front view (figure seen from the downstream) of the position adjustment apparatus of the sheet material used for the position adjustment method of the sheet material of one Embodiment of this invention. It is the (a) front view and (b) side view of the drive wheel and free wheel in the position adjusting device of FIG. FIG. 2A is a plan view and FIG. 2B is a front view of a drive wheel and a rotation drive device before rotating about a vertical axis in the position adjustment device of FIG. 1. 2A is a plan view and FIG. 2B is a front view of the drive wheel and the rotational drive device after being rotated about a vertical axis in the position adjustment device of FIG. 1. It is the (a) top view and (b) front view explaining rotation of the free wheel around the vertical axis behind the drive wheel. It is a block diagram in the case of providing a slitter apparatus in the downstream of the position adjustment apparatus of FIG.

  Hereinafter, a sheet material position adjusting method according to an embodiment of the present invention (hereinafter, simply referred to as “position adjusting method”), and a sheet material position adjusting apparatus 1 (hereinafter referred to as “position adjusting method”). The configuration of the “position adjusting device 1”) will be described with reference to FIGS.

  The position adjusting device 1 includes a support surface 62 that supports the traveling sheet material S from below, a seat support base 60 that includes a part of the support surface 62 and an open portion 64 that allows the upper and lower spaces to communicate with each other. A drive wheel 20 that is rotatable around the parallel first shaft portion 11 and that can be rotated around the third shaft portion 13 that is perpendicular to the support surface 62 by driving the cylinder device 55, and a fifth shaft that is parallel to the support surface 62. And a free wheel 40 rotatable around the sixth shaft portion 16 perpendicular to the support surface 62, and one of the drive wheel 20 and the free wheel 40 is a seat support at the opening 64. The other of the drive wheel 20 and the universal wheel 40 is located above the seat support 60 at the opening 64. In this embodiment, the case where the drive wheel 20 is located above the seat support base 60 and the universal wheel 40 is located below the seat support base 60 is illustrated.

  More specifically, the support surface 62 is the upper surface of a flat plate-like support plate 61, and the support plate 61 is horizontally supported at a predetermined height from the installation surface by a plurality of support columns 66. The support plate 61 is divided into an upstream side and a downstream side, and the gap forms an open portion 64.

  At a position higher than the height of the support surface 62 in the opening portion 64, a horizontal member 67 is bridged horizontally between the columns 66 in a direction perpendicular to the traveling direction of the sheet material S. A thick plate-like elevating member 30 that moves up and down is provided. Specifically, a motor 51 that rotates in the forward and reverse directions is fixed to the horizontal member 67, and a male screw shaft portion 52 that extends from the rotation shaft of the motor 51 extends downward in the vertical direction. The elevating member 30 is formed with a female screw portion (not shown) that is screwed with the male screw shaft portion 52. With this configuration, the elevating member 30 moves up and down with respect to the horizontal member 67 by forward and reverse rotation of the motor 51. A pair of sleeves 69 project from the horizontal member 67 toward the upstream side, and a guide bar 39 that slides in a hole that penetrates the sleeve 69 in the vertical direction extends upward from the lifting member 30. ing. Thereby, the raising / lowering movement of the raising / lowering member 30 with respect to the horizontal member 67 is guided by the guide rod 39 which slides in the through hole of the sleeve 69, and is performed stably.

  A plurality of drive wheels 20 rotate around a single parallel axis and rotate around a single vertical axis. In this embodiment, two sets of such drive wheels 20 are provided. . Since these two sets of drive wheels 20 have the same configuration, one of them will be described as an example. Each of the plurality of drive wheels 20 is rotatable around a single first shaft portion 11 that is parallel to the support surface 62, and the first shaft portion 11 is between both ends of the U-shaped wheel support portion 21. It is laid over. The axis of the first shaft portion 11 corresponds to “an axis parallel to the support surface (parallel axis)” relating to the drive wheel in the present invention.

  The wheel support portion 21 is fixedly provided in parallel with the support surface 62 from the elevating member 30 toward the upstream side, and via a connection piece 32 that is fixedly provided and a connection support portion 22 that is U-shaped and has an open end downward. And supported by the elevating member 30. Specifically, the middle part of the U-shaped connection support part 22 is pivotally supported with respect to the mounting piece 32 by the third shaft part 13 perpendicular to the support surface 62. The axis of the third shaft portion 13 corresponds to the “axis perpendicular to the support surface (vertical axis)” in the present invention with respect to the drive wheel. The connection support part 22 sandwiches the wheel support part 21 between both ends, and both end parts of the connection support part 22 are formed on both side surfaces of the hole support part by the second shaft part 12 parallel to the support surface 62. On the other hand, it is pivotally supported. A curved leaf spring 23 is disposed between the intermediate part of the connection support part 22 and the intermediate part of the wheel support part 21.

  From the intermediate part of the connection support part 22, the attachment piece 25 is projected in a fixed manner at a right angle and parallel to the support surface 62. Accordingly, the attachment pieces 25 are provided so as to protrude from the two connection support portions 22 that support the set of the two drive wheels 20 respectively. One of the two attachment pieces 25 is attached to one end of an elongated plate-like connection bar 31, and the other attachment piece 25 is provided to the other end of the connection bar 31. The fourth shaft portion 14 perpendicular to the support surface 62 is pivotally connected to the support surface 62 via the. The cylinder side end of the cylinder device 55 that is operated by air or hydraulic pressure supports the mounting piece 35 that is fixedly projected in parallel to the support surface 62 from the elevating member 30 toward the upstream side. The tip of the piston rod of the cylinder device 55 projects in a fixed manner in parallel with the support surface 62 from the coupling bar 31 toward the downstream side. The mounting piece 39 is rotatably supported by a shaft portion 19 perpendicular to the support surface 62. The cylinder device 55 corresponds to the “rotation drive device” of the present invention.

  A plurality of the universal wheels 40 are configured to rotate around a single parallel axis. In this embodiment, two sets of the universal wheels 40 are provided, and each of them is positioned directly below the set of two drive wheels 20. doing. Since the set of the two free wheels 40 has the same configuration, one of them will be described as an example. Each of the plurality of free wheels 40 is rotatable around a single fifth shaft portion 15 parallel to the support surface 62, and the fifth shaft portion 15 is bridged between both ends of the U-shaped free wheel support portion 41. Has been. The axis of the fifth shaft portion 15 corresponds to the “axis parallel to the support surface (parallel axis)” relating to the free wheel in the present invention.

  In the opening portion 64, at a position lower than the height of the support surface 62, a horizontal member 68 is bridged between the support columns 66 in a direction that is perpendicular to the traveling direction of the sheet material S. The universal wheel support portion 41 is pivotally supported with respect to the horizontal member 68 by the sixth shaft portion 16 perpendicular to the support surface 62 via a mounting portion 42 protruding from the intermediate portion. ing. The axial center of the sixth shaft portion 16 corresponds to the “axis perpendicular to the support surface (vertical axis)” relating to the universal wheel in the present invention. Moreover, the universal wheel 40 is supported by the horizontal member 68 so that the upper end thereof is at the same height as the support surface 62.

  The position adjustment apparatus 1 includes a computer (not shown) that includes a main storage device, a central processing unit (CPU) that performs processing according to a program stored in the main storage device, and an auxiliary storage device such as a hard disk. The main storage device calculates a deviation in the width direction of the sheet material S based on detection by a detection device such as a camera that detects a position in the width direction of the sheet material S, and responds to the calculated deviation distance. Thus, a position control program for rotating the drive wheel 20 around the third shaft portion 13 is stored.

  The position adjustment method performed using the position adjustment apparatus 1 having the above-described configuration includes a support surface 62 that supports the sheet material S from below, and a sheet that includes an opening portion 64 that allows a part of the support surface 62 to communicate with the upper and lower spaces. The sheet material S travels along the support base 60 and is rotatable around the first shaft portion 11 parallel to the support surface 62, and is rotated around the third shaft portion 13 perpendicular to the support surface 62 by driving the cylinder device 55. A movable drive wheel 20 and a free wheel 40 rotatable around a fifth shaft portion 15 parallel to the support surface 62 and rotatable around a sixth shaft portion 16 perpendicular to the support surface 62, an open portion 64. The sheet material S is sandwiched from above and below, and the drive wheel 20 is rotated around the third shaft portion 13 by a predetermined angle by driving the cylinder device 55 to move the sheet material S in the width direction. Follow the movement of direction , Late to rotation of the drive wheel 20, it is intended to rotate the movable wheel 40 around the sixth shaft portion 16.

  More specifically, first, prior to the start of the operation of the position adjusting device 1 or when switching the type of corrugated cardboard sheet to be manufactured, the motor 51 is rotated according to the thickness of the sheet material S to move the elevating member 30. The drive wheel 20 is brought into contact with the upper surface of the sheet material S. For example, information on the type and thickness of the sheet material S is obtained by connecting the computer of the position adjusting device 1 to the production management device of the corrugated cardboard production line or the office computer of the business operator so that wired communication or wireless communication is possible. Can be acquired at any time from a production management device or an office computer. Alternatively, the information regarding the type and thickness of the sheet material S can be acquired in advance from the production management device or the office computer, stored in the auxiliary storage device, and read and used. Furthermore, the main memory device of the computer stores a wheel height adjustment program that drives the motor 51 based on information on the thickness of the sheet material S and adjusts the height of the drive wheel 20 via the elevating member 30. I can leave it to you.

  Since a curved leaf spring 23 is disposed between the connection support portion 22 and the wheel support portion 21, when the driving wheel 20 comes into contact with the upper surface of the sheet material S due to the lowering of the elevating member 30, the wheel support is supported. The plate spring 23 bends while rotating the portion 21 upward about the second shaft portion 12 with respect to the connection support portion 22. Thereby, the sheet material S can be firmly pressed by the drive wheel 20 without pressing the sheet material S excessively.

  On the other hand, since the free wheel 40 is supported at the opening portion 64 so that the upper end thereof is at the same height as the support surface 62, the free wheel 40 contacts the sheet material S from below. As a result, the sheet material S is sandwiched from above and below by the drive wheel 20 and the universal wheel 40. The drive wheel 20 is rotatable around the first shaft portion 11 parallel to the support surface 62, and the free wheel 40 is also rotatable around the fifth shaft portion 15 parallel to the support surface 62. The driving of the sheet material S is not hindered by the drive wheel 20 and the universal wheel 40 sandwiched between the two.

  As shown in FIG. 3, when the drive wheel 20 is not rotated around the third shaft portion 13, the relative traveling direction of the drive wheel 20 and the universal wheel 40 with respect to the sheet material S is as shown in FIG. As shown to the right of each of a) and (b), it corresponds to the traveling direction of the sheet material S. Therefore, in this state, the position in the width direction of the traveling sheet material S does not change between the upstream side and the downstream side of the drive wheel 20 and the universal wheel 40. Here, FIG. 3 illustrates a range A in FIG. FIG. 5A shows a plan view of the drive wheel 20 and the universal wheel 40 as viewed from above, and the sheet material S travels from top to bottom on the paper surface. FIG. 5B is a front view of the drive wheel 20 and the universal wheel 40 as viewed from the downstream side. In addition, illustration of the sheet material S is abbreviate | omitted in FIG.

  When the travel position of the sheet material S is moved in the width direction, the drive wheel 20 is rotated around the third shaft portion 13 by a desired angle as shown in FIG. This is done by moving the piston rod of the cylinder device 55 forward or backward. FIG. 4 shows a case where the piston rod is advanced. Thereby, the cylinder device 55 moves the connecting bar 31 connected to the tip of the piston rod in the width direction while rotating around the shaft portions 18 and 19. As a result, the mounting piece 25 pivotally supported on the connecting bar 31 by the fourth shaft portion 14 rotates around the fourth shaft portion 14. Accordingly, the attachment piece 25 is fixed, and the connection support portion 22 pivotally supported by the third shaft portion 13 with respect to the attachment piece 32 fixed to the elevating member 30 is the first. It rotates around the triaxial portion 13. At the same time, the wheel support portion 21 supported so as to be sandwiched by the connection support portion 22 rotates around the third shaft portion 13, and the drive wheel 20 supported by the wheel support portion 21 rotates around the third shaft portion 13. Move. As a result, the relative traveling direction of the drive wheel 20 with respect to the sheet material S is inclined with respect to the traveling direction of the sheet material S, as shown in the center diagrams of FIGS.

  Thereby, the force which moves to the width direction with respect to the sheet material S from the drive wheel 20 acts, and the sheet material S moves to the width direction. At this time, since the sheet material S is sandwiched between the drive wheel 20 and the universal wheel 40, the force from the drive wheel 20 acts on the sheet material S efficiently. Then, as the travel position of the sheet material S moves in the width direction, the free wheel 40 rotates following the sheet material S by the frictional force acting between the sheet material S and the sheet material S. That is, as shown in the left diagrams of FIGS. 5A and 5B, the free wheel 40 rotates around the sixth shaft portion 16, and the relative traveling direction with respect to the sheet material S is finally the drive wheel. Matches 20. Thus, the universal wheel 40 rotates around an axis perpendicular to the support surface 62 behind the drive wheel 20.

  As described above, according to the position adjustment device 1 of the present embodiment and the position adjustment method performed by the position adjustment device 1, only the drive wheel 20 out of the drive wheel 20 and the universal wheel 40 is perpendicular to the sheet material S. The position of the sheet material S in the width direction can be adjusted with a simple device and method of rotating around the third shaft portion 13. Further, since the sheet material S is sandwiched from above and below by the drive wheel 20 and the universal wheel 40, the force from the drive wheel 20 can be efficiently transmitted to the sheet material S without strongly pressing the sheet material S. In addition, the risk of the sheet material S being crushed can be reduced.

  Further, in the present embodiment, two sets of the drive wheels 20 that rotate around the third shaft portion 13 are respectively connected by the connection bar 31 via the attachment pieces 25. Thereby, two of the sets of the drive wheels 20 can be simultaneously rotated around the third shaft portion 13 at the same angle by the single cylinder device 55.

  Said position adjustment apparatus 1 can be used for the position adjustment method which adjusts the shift | offset | difference of the position of the width direction of the single-sided cardboard sheet | seat before bonding with a front liner, for example. In addition, the position adjusting device 1 can also be used in the following position adjusting method. That is, a slitter device 71 that cuts the sheet material S in parallel to the traveling direction is provided on the downstream side of the drive wheel 20 and the universal wheel 40 in the line where the sheet material S travels, and the sheet material S is cut at right angles to the traveling direction. The position of the cut mark attached to the sheet material S as a position to be read is read by the camera 75 as a detection device installed on the downstream side of the slitter device 71, and the read position of the cut mark is compared with the target position. In this position adjustment method, the cylinder device 55 serving as a rotation drive device is controlled to adjust the angle at which the drive wheel 20 is rotated about an axis perpendicular to the support surface 62.

  More specifically, as shown in FIG. 6, two slitter devices 71 are provided along the traveling direction, and a camera 75 as a detection device for imaging the lower surface of the sheet material S is provided downstream of each. Is provided. Further, a cutting device 72 is provided further downstream of the second slitter device 71 to cut the sheet material S at right angles to the running direction to obtain a corrugated cardboard blank S ′.

  With this configuration, the cut mark previously attached to the lower surface of the sheet material S is imaged by the camera 75, and the imaging data is sent to the computer. The computer detects the inner edge in the width direction of the cut mark by image processing, and compares the position with the target position, thereby calculating a shift in the position of the sheet material S in the width direction. Then, based on the calculation result, the computer rotates the drive wheel 20 around the third shaft portion 13 to move the sheet material S in the width direction, and the position of the inner edge in the width direction of the cut mark is determined. Adjust to match the target position. The universal wheel 40 sandwiches the sheet material S together with the drive wheel 20 and efficiently transmits the force acting on the sheet material S from the drive wheel 20 to the sheet material S. Then, the free wheel 40 follows the movement in the width direction of the sheet material S due to friction with the sheet material S, and rotates around the sixth shaft portion 16 behind the drive wheel 20. Thereby, the relative traveling direction with respect to the sheet material S coincides between the drive wheel 20 and the universal wheel 40, and the traveling of the sheet material S is stably guided.

  As described above, by arranging the camera 75 on the downstream side of the slitter device 71, the conventional apparatus has a facility for moving the slitter device 71 in the width direction following the shift in the width direction of the travel position of the sheet material S. While using the production line, the sheet material S is moved in the width direction by the drive wheel 20 and the universal wheel 40 so that the shift in the position in the width direction of the sheet material S caused by the movement of the slitter device 71 is offset. be able to. Thereby, the position of the width direction of the traveling sheet material S can be accurately adjusted.

  In the present embodiment, a cut mark previously attached to the sheet material S is used as an object to be imaged by the camera 75. Even if the sheet material S flowing into the slitter device 71 is displaced in the width direction, the cut mark is not completely cut off. Thereby, the shift | offset | difference of the position of the width direction of the sheet material S can be detected reliably, and the position of the width direction of the sheet material S can be adjusted correctly based on the detection.

  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, from the set of four drive wheels 20 that rotate around the single third shaft portion 13 and the four universal wheels 40 that rotate around the single sixth shaft portion 16. The case where the set which becomes is illustrated by illustration. The number of drive wheels 20 or universal wheels 40 constituting one set is not limited to four, and one set may be constituted by other numbers of drive wheels 20 or universal wheels 40.

  Moreover, in the above, the drive wheel 20 contacted the upper surface of the sheet material S, and the case where the universal wheel 40 contacted the lower surface of the sheet material S was illustrated. However, the present invention is not limited to this, and the free wheel 40 may be in contact with the upper surface of the sheet material S and the drive wheel 20 may be in contact with the lower surface of the sheet material S.

  Furthermore, in the above, as a mechanism for raising and lowering the drive wheel 20, the motor 51 fixed to the horizontal member 67, the male screw shaft portion 52 extending from the rotation shaft of the motor 51, and the drive wheel 20 are attached. The female screw part provided in the raising / lowering member 30 was illustrated. It is not limited to this, It can be set as the structure which raises / lowers the raising / lowering member 30 with the cylinder apparatus 55 fixed to the horizontal member 67. FIG.

1. Position adjustment device ("Cardboard sheet position adjustment device")
11 First shaft (The axis is “axis parallel to the support surface”)
13 Third shaft (axis is “axis perpendicular to the support surface”)
15 Fifth shaft part (The axis is “axis parallel to the support surface”)
16 Sixth shaft part (axis is “axis perpendicular to the support surface”)
20 Drive wheel 40 Swivel wheel 55 Cylinder device ("Rotary drive device")
60 Sheet support base 62 Support surface 64 Opening portion 71 Slitter device 75 Camera ("detection device")
S sheet material

Japanese Patent No. 3444235 JP 2007-30178 A

Claims (1)

A sheet material position adjustment method for adjusting the position in the width direction of a sheet material traveling in a production line for corrugated cardboard sheets without using a guide plate for slidingly contacting the side of the sheet material,
The sheet material is allowed to travel along a support surface that supports the sheet material from below, and a sheet support base that includes an open portion that communicates the upper and lower spaces with a part of the support surface.
A drive wheel that is rotatable about an axis parallel to the support surface, and is rotatable about an axis perpendicular to the support surface by driving of a rotation drive device; and rotatable about an axis parallel to the support surface; With a free wheel rotatable around an axis perpendicular to the support surface, the sheet material is sandwiched from above and below in the open portion,
Based on the detection of the position in the width direction of the sheet material, to calculate the displacement in the width direction of the sheet material,
If the sheet material is not misaligned in the width direction, the drive wheel and the universal wheel can be moved with respect to the sheet material without rotating the drive wheel about an axis perpendicular to the support surface. Roll in a state where the rolling direction matches the traveling direction of the sheet material flowing in from the upstream side,
If the sheet material is displaced in the width direction, the driving wheel is driven around the axis perpendicular to the support surface by a predetermined angle by driving the rotation driving device based on the calculated position displacement in the width direction. Moving the sheet material in the width direction by tilting the rolling direction of the drive wheel relative to the sheet material with respect to the traveling direction of the sheet material flowing in from the upstream side,
Following the movement of the sheet material in the width direction, the rolling wheel is rotated about an axis perpendicular to the support surface behind the rotation of the drive wheel, thereby changing the rolling direction relative to the sheet material. The position adjustment method of the sheet | seat material characterized by making it correspond with the said drive wheel and the said universal wheel.

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