JP5226033B2 - Sheet material position adjustment device - Google Patents

Description

  The present invention relates to a sheet material position adjusting device used for aligning edges in the width direction of sheet materials to be bonded while traveling in a manufacturing process of a corrugated cardboard sheet.

  In the production of corrugated cardboard sheets, in the corrugator, the core core paper is formed into a corrugated shape and bonded to the liner to produce a single-sided cardboard sheet, the step of laminating the liner to the top of the single-sided cardboard sheet, etc. A step of bonding a sheet material such as a base paper, a liner, and a single-sided cardboard sheet is performed. Such a bonding process is performed while the sheet material is running. However, due to a shift in the position of the sheet material in the width direction, the edges in the width direction may become uneven between the sheet materials to be bonded. 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. Therefore, in the manufacturing process of the corrugated cardboard sheet, position adjustment that aligns the edges in the width direction of the traveling sheet material, so-called “ear matching” is performed.

  Conventionally, this position adjustment is performed by an operator who has confirmed that the edges have shifted in a single facer that bonds a liner to a corrugated core base paper or a double facer that bonds a liner to a single-sided cardboard sheet. However, in a mill roll stand on which a liner or a core base paper roll is mounted, the position where the base paper is supplied is adjusted. However, the distance between the single facer or double facer for bonding the sheet material and the mill roll stand for supplying the base paper is greatly separated. Therefore, until the position adjustment in the mill roll stand is reflected in the bonding position of the sheet material, there is a problem that the distance that the sheet material travels is considerably long and wasteful.

  In addition, when manufacturing a double-sided corrugated cardboard sheet or a double-sided corrugated cardboard sheet, if there is a shift in the edges of the single-sided cardboard sheets to be bonded together, the adjustment on the mill roll stand will adjust the position of the edges. There was a problem that I could not.

  In view of this, the present applicant has proposed a position adjustment device 100 that can adjust the position of the edge side near the bonding position of the sheet material (see Patent Document 1). As shown in FIG. 5, a pair of rotating rolls 101 and 102 are arranged in parallel at a predetermined interval, and the rolls 101 and 102 are supported at different heights. Then, as shown in FIG. 5A, the sheet material 110 traveling in the cardboard sheet manufacturing process is wound around one roll 101 so as to circulate from the outside, and a gap between the rolls 101 and 102 is formed. Further, it is wound around the other roll 102 so as to circulate in the direction opposite to that when it is wound around the roll 101.

  In the position adjusting device 100 having such a configuration, as shown in FIG. 5B, when the axial direction of the rolls 101 and 102 is orthogonal to the traveling direction of the sheet material (shown by an arrow), the rolls 101 and 102 pass. The position of the edge in the width direction of the sheet material 110 after the same is the same as that before passing through the rolls 101 and 102 as shown by the chain line. On the other hand, when the axial direction of the rolls 101 and 102 is tilted from the direction orthogonal to the traveling direction of the sheet material while maintaining the positional relationship between the rolls 101 and 102, the end side position is before and after passing through the rolls 101 and 102. Displaces in the width direction. The displacement amount L can be adjusted by the angle at which the axial direction of the rolls 101 and 102 is inclined. Accordingly, by arranging the position adjusting device 100 immediately before the bonding position of the sheet material, the position adjustment for aligning the edge sides of the sheet material can be performed efficiently, and the corrugated cardboard to be discarded because the edges are not aligned. Sheets can be reduced.

  Further, since the rolls 101 and 102 around which the sheet material 110 is wound are parallel, the sheet material 110 is not twisted before and after being wound around the rolls 101 and 102. Accordingly, it is possible to adjust the position of aligning the end sides without generating an excessive tension on the sheet material 110.

  However, in the position adjusting device 100 described above, when the axial directions of the rolls 101 and 102 are tilted, the rotation direction of the rolls 101 and 102 does not coincide with the traveling direction of the sheet material. That is, the traveling direction of the sheet material sent from the roll 101 and the sheet material sent to the roll 102 matches the rotation direction of each of the rolls 101 and 102, but the sheet material sent to the roll 101 and the sheet 102 are sent from the roll 102. The traveling direction of the sheet material does not coincide with the rotation direction of the rolls 101 and 102. For this reason, the traveling direction of the sheet material is affected by the force acting on the sheet material from the rotating rolls 101 and 102, and it may be difficult to precisely control the position adjustment for aligning the edges of the sheet material.

  In order to tilt the roll 101, 102 without greatly moving the roll 101, 102 in the traveling direction, it is desirable to rotate the roll 101, 102 around the rotation axis located between the roll 101, 102. A rotating shaft cannot be provided at a position that crosses. Here, the members that respectively support both ends of the two rolls are connected at a position higher than the traveling height of the sheet material or at a position lower than the traveling height of the sheet material, and a rotating shaft is attached to the connecting member. A configuration in which the motor is driven to rotate can also be conceived. However, since the width of the base paper for producing the corrugated cardboard sheet is as long as 2000 mm to 3000 mm, the roll around which the paper is wound is also long. And in order for a long roll not to bend, since it is necessary to form thickly with a highly rigid material, a roll becomes a structure with a large sized and heavy.

  Therefore, a rotating shaft that supports a member that supports a large and heavy roll so as to be placed from below, or a rotating shaft that supports a member that hangs down from above must be quite sturdy. A large motor or the like for rotating the motor is required. Therefore, an apparatus that can adjust the position of the edge of the sheet material with a simpler configuration has been desired.

  Therefore, in view of the above situation, the present invention can precisely control the position adjustment for aligning the edges in the width direction of the sheet material to be bonded while traveling in the manufacturing process of the cardboard sheet with a simple configuration. An object of the present invention is to provide a material position adjusting device.

  In order to solve the above-described problems, the sheet material position adjusting device according to the present invention includes a "first bar that does not rotate and a pair of both ends of the first bar that are attached to support the first bar horizontally. Both ends of the bar support part and the pair of bar support parts are attached to each other, and are parallel to and spaced apart from the first bar, and are supported at a different height from the first bar. A pair of engagement pieces each having a second bar and arc-shaped portions that are part of a virtual circle centered on a virtual point located between the first bar and the second bar; A groove that engages with the arcuate portion is formed on the peripheral surface, and two or more wheels that are rotatable about a vertical axis are provided for each of the pair of engaging pieces, and each of the wheels stands from a gantry placed on the installation surface. A pair of the bar support portions is attached to the pair of fixed support portions provided. A rotation support mechanism that is rotatably supported around a virtual point; and a drive device that applies a horizontal force to at least one of the pair of bar support portions, wherein the pair of engagement pieces Is attached to the outside of each of the pair of bar support portions and is formed into the arc-shaped portion along the outer periphery, and the wheel is supported by the fixed support portion.

  “Sheet material” refers to a liner, corrugated core base paper, single-sided corrugated cardboard sheet, and a sheet in which single-sided corrugated cardboard sheets are laminated in two or more layers.

  According to the said structure, the position of the edge of the width direction of a sheet | seat material can be adjusted on the principle similar to the position adjustment apparatus 100 of the above-mentioned patent document 1, As a result, the edge of the bonded sheet | seat material is extended. Can be aligned. Here, since the first bar and the second bar of the present invention are configured not to rotate, unlike the position adjustment device 100 of Patent Document 1, there is a problem that the traveling direction of the sheet material is affected by the rotation direction of the roll. I don't have it. Thereby, the angle at which the axial direction of the first bar and the second bar is inclined, in other words, the angle at which the pair of bar support portions are rotated around the vertical axis passing through the virtual point, and the displacement of the position of the edge of the sheet material Correlation with the amount is high, and the position of the edge of the sheet material can be precisely controlled.

  Further, as the rotation support mechanism for rotating the pair of bar support portions, a position where the sheet material crosses by adopting a configuration of an engagement piece having an arcuate portion and a wheel having a groove engaging with the arcuate portion. The pair of bar support portions can be rotated without providing an actual rotating shaft.

  Further, the first bar and the second bar include a bar support portion, an engagement piece attached to the bar support portion, a wheel that engages with the arc-shaped portion of the engagement piece, and a fixed support portion on which the wheel is supported. Therefore, even if the first bar and the second bar are heavy, they can be stably supported. In addition, since the engagement piece attached to the bar support part is engaged with the wheel, even if the first bar and the second bar supported by the bar support part are heavy, a small force is required. Can rotate the bar support. Therefore, the first bar and the second bar can be stably supported even when the first bar and the second bar are heavy, and can be rotated with a small force, while having a simple configuration without an actual rotation axis. The position of the edge of the sheet material can be adjusted precisely by rotating the second bar.

  On the other hand, the position adjustment device for a sheet material according to the present invention replaces the above-described configuration with a pair of “a first bar that does not rotate and both ends of the first bar are attached, and supports the first bar horizontally. Both end portions are attached to the bar support portion and the pair of bar support portions, respectively, and are supported in parallel with a distance from the first bar and at a different height from the first bar. And a pair of engaging pieces each having an arcuate portion that is a part of a virtual circle centered on a virtual point located between the first bar and the second bar, A groove that engages with the arcuate portion is formed on the peripheral surface, and two or more wheels that are rotatable about a vertical axis are provided for each of the pair of engaging pieces, and each of the pair of engaging pieces is erected from a mount placed on the installation surface. A pair of the bar support portions is attached to the pair of fixed support portions that are A rotation support mechanism that is rotatably supported around a point of interest, and a drive device that applies a horizontal force to at least one of the pair of bar support portions. In the rotation support mechanism, the pair of engagement pieces Each of them may be attached to the inside of each of the pair of fixed support portions to form the arc-shaped portion along the inner periphery, and the wheel may be supported by the bar support portion ”.

  The difference from the above-described configuration is that the objects to which the engagement pieces and the wheels constituting the rotation support mechanism are respectively attached are opposite. Also with this configuration, the same effect as the above configuration can be obtained.

  As described above, as an effect of the present invention, the sheet material capable of precisely controlling the position adjustment for aligning the edges in the width direction of the sheet material bonded while traveling in the manufacturing process of the corrugated cardboard sheet with a simple configuration. It is possible to provide a position adjusting device.

It is a top view of the position adjustment apparatus of the sheet | seat material of 1st embodiment of this invention. It is a perspective view of the position adjustment apparatus of the sheet | seat material of FIG. It is a figure explaining the position adjustment in the position adjustment apparatus of the sheet | seat material of FIG. It is a top view of the position adjustment apparatus of the sheet | seat material of 2nd embodiment of this invention. It is a figure explaining the principle of the position adjustment by the position adjustment apparatus of patent document 1. FIG.

  A sheet material position adjusting apparatus 1 (hereinafter simply referred to as “position adjusting apparatus 1”) according to a first embodiment of the present invention will be described below with reference to FIGS. The position adjusting device 1 includes a first bar 11 that does not rotate, a pair of bar support portions 10 that are attached to both ends of the first bar 11 and support the first bar 11 horizontally, and a pair of bar support portions 10. Both end portions are attached, parallel to the first bar 11 with a gap therebetween, and supported at a height different from that of the first bar 11, the non-rotating second bar 12, the first bar 11 and the second bar A groove that includes a pair of engaging pieces 20 each having an arcuate portion 21 that is a part of an imaginary circle C centered on an imaginary point P located between the bar 12 and that engages with the arcuate portion 21 A pair of wheels 30 that are formed on the peripheral surface and are rotatable about a vertical axis 37 with respect to each of the pair of engagement pieces 20 and that are respectively erected from a pedestal 50 placed on the installation surface. The pair of bar support portions 10 is temporarily attached to the fixed support portion 51 of the A rotation support mechanism M that is rotatably supported around the point P and a drive device that applies a horizontal force to at least one of the pair of bar support portions 10 are provided. In the rotation support mechanism M, the pair of engagement pieces 20 are provided. Are attached to the outside of each of the pair of bar support portions 10 to form an arcuate portion 21 along the outer periphery, and the wheel 30 is supported by a fixed support portion 51.

  More specifically, the first bar 11 and the second bar 12 have the same length and are both solid or hollow round bars, and the outer circles of the cross section have the same diameter. The first bar 11 and the second bar 12 can be formed of a material having high rigidity and high strength such as metal. Then, the first bar 11 and the second bar 12 are placed at both ends of the bar so that the pair of the flat bar support portions 10 are laid across in parallel with the pair of flat bar support portions 10 standing in the vertical direction. It is supported so as not to rotate with respect to the inner surface of the support portion 10. In the present embodiment, the second bar 12 is supported at a position higher than the first bar 11. Further, a gap wider than the thickness of the sheet material is formed between the first bar 11 and the second bar 12.

  A flat plate-like engagement piece 20 is attached to the outer side surface of each of the pair of bar support portions 10 so as to project in the shape of a bowl in the horizontal direction. It is. That is, the arcuate portion 21 is formed along the outer periphery of the engagement piece 20.

  On the other hand, each of the pair of fixed support portions 51 is erected from the gantry 50 so as to extend in the vertical direction outside the bar support portion 10, and is a flat plate-like wheel extending perpendicularly from the upper end to the outside. A support 52 is provided. The wheel 30 is pivotally supported on the upper surface of the wheel support portion 52 in a state where the peripheral surface protrudes inward from the fixed support portion 51. Two wheels 30 are provided for each of the pair of fixed support portions 51. A groove 31 that is slightly wider than the thickness of the arcuate portion 21 of the engagement piece 20 is formed in the circumferential direction on the peripheral surface of each wheel 30, and the arcuate portion 21 of the engagement piece 20 is The groove 31 is engaged. That is, one engagement piece 20 is engaged with the groove 31 of the two wheels 30.

  Thereby, the first bar 11 and the second bar 12 include the bar support portion 10, the engagement piece 20 attached to the bar support portion 10, the wheel 30 engaged with the arcuate portion 21 of the engagement piece 20, and It is supported by the gantry 50 via a fixed support portion 51 on which the wheel 30 is supported.

  Further, the position adjusting device 1 includes a cylinder device 40 that operates by air or hydraulic pressure as a driving device. The drive cylinder portion 41 of the cylinder device 40 rotates around a vertical shaft 42 via a mounting member 55 on one of the pair of fixed support portions 51 in a state where the direction in which the piston rod 45 advances and retreats is horizontal. It is supported freely. One of the pair of bar support portions 10 is provided with a protruding piece 17 at a position where it does not interfere with the engaging piece 20, and the tip of the piston rod 45 of the cylinder device 40 is perpendicular to the protruding piece 17. The shaft 46 is rotatably supported around the shaft 46.

  When using the position adjusting apparatus 1 having the above configuration, as shown in FIG. 3, the sheet material S is wound around one of the first bar 11 and the second bar 12 so as to circulate from the outside. Here, a case where the sheet material S is wound first from the lower first bar 11 is illustrated. The sheet material S wound around the first bar 11 passes through the gap between the first bar 11 and the second bar 12, and further in a direction opposite to the direction wound around the first bar 11. It winds around the 2nd bar 12 so that it may go around.

  And when the edge of the width direction of the bonded sheet | seat material S has gathered, as shown to Fig.3 (a), the axial direction of the 1st bar | burr 11 and the 2nd bar | burr 12 is made into the sheet | seat material S direction. It is made to correspond with the direction orthogonal to a running direction (illustration, arrow). In this case, the position of the end side of the sheet material S is not displaced before and after passing through the position adjusting device 1.

  On the other hand, when the ends in the width direction of the bonded sheet material S become uneven, the cylinder device 40 is operated to move the piston rod 45 forward or backward as shown in FIG. Here, the case where the piston rod 45 is retracted is illustrated as an example. As a result, a horizontal force acts on the bar support portion 10 via the projecting piece 17, but the engagement piece 20 engaged with the wheel 30 by the arc-shaped portion 21 is attached to the bar support portion 10. ing. Therefore, the pair of bar support portions 10 that move integrally by being connected by the first bar 11 and the second bar 12 are perpendicular to each other through a virtual point P that is the center point of the arc of the arc-shaped portion 21. Rotate a predetermined angle around the axis. Here, the piston rod 45 of the cylinder device 40 is configured to linearly advance and retreat, but the tip of the piston rod 45 and the drive cylinder portion 41 are pivotally supported around vertical shafts 46 and 42, respectively. Therefore, the tip of the piston rod 45 supported by the bar support portion 10 moves along the circumference around the virtual point P as the bar support portion 10 rotates.

  As the pair of bar support portions 10 move as described above, the axial directions of the first bar 11 and the second bar 12 are inclined by a predetermined angle from the direction perpendicular to the traveling direction of the sheet material S. Thereby, the position of the edge side of the sheet material S is displaced before and after passing through the position adjusting device 1. Here, since the displacement amount of the position of the end side changes depending on how much the axial direction of the first bar 11 and the second bar 12 is inclined, it can be adjusted by the length by which the piston rod 45 is moved forward or backward. .

  For example, the cylinder device 40 receives a signal sent from a detection device that quantitatively detects the deviation of the edge of the bonded sheet material by a control device such as a computer or a programmable controller, and is controlled by a preset program. The length of operating the piston rod 45 can be adjusted. Here, as a detection apparatus for detecting the deviation of the edge of the sheet material, for example, a detection apparatus including a camera for photographing the vicinity of the edge of the sheet material and a computer having a program for analyzing an image captured by the camera. Can be used.

  As described above, according to the position adjusting device 1 of the first embodiment, the sheet material is wound around the parallel first bar 11 and the second bar 12, and the axial direction of the first bar 11 and the second bar 12 is set to the sheet. By tilting with respect to the direction orthogonal to the traveling direction of the material, the position of the edge in the width direction of the sheet material can be changed, and thus the position of the edge of the sheet material to be bonded can be aligned. . Thereby, by arrange | positioning the position adjustment apparatus 1 just before the bonding process of a sheet | seat material, the position of an edge side becomes uneven and it can reduce the corrugated cardboard sheet | seat which becomes a discard object.

  In addition, since the first bar 11 and the second bar 12 do not rotate around the central axis of the first bar 11 and the conventional position adjusting device 100 using a rotating roll, the traveling direction of the sheet material depends on the rotating direction of the roll. Does not have the problem of being affected. Thereby, the angle which inclines the axial direction of the 1st bar 11 and the 2nd bar 12, in other words, the angle which rotates a pair of bar support part 10 to the surroundings of the perpendicular axis which passes along the virtual point P, and the edge of a sheet | seat material Therefore, the position of the edge of the sheet material can be precisely controlled.

  In addition, as the rotation support mechanism M for rotating the pair of bar support portions 10, a configuration of an engagement piece 20 having an arc-shaped portion 21 and a wheel 30 having a groove 31 to be engaged with the arc-shaped portion 21 is adopted. Thereby, even if a rotating shaft does not exist in the center of rotation, a pair of bar support part 10 can be rotated. That is, the pair of bar support portions 10 can be rotated around the virtual rotation axis without providing an actual rotation axis at a position where the sheet material crosses.

  By the way, a structure which connects a pair of bar support part 10 above or below the 1st bar 11 and the 2nd bar 12, actually attaches a rotating shaft to this connecting member, and rotationally drives with a motor etc. can also be considered. . However, when the width of the sheet material is large, the first bar 11 and the second bar 12 around which the sheet material is wound must be long and heavy. For this reason, the bar support portion 10 that supports the first bar 11 and the second bar 12, which are heavy objects, is supported by the rotating shaft from below, or supported by the rotating shaft so as to hang down from above, and the rotating shaft is rotated. In order to drive, it is necessary to make a rotating shaft quite sturdy and to use a large drive device.

  On the other hand, in the position adjustment apparatus 1 of the present embodiment, the pair of bar support portions 10 are supported by the gantry 50 via the pair of fixed support portions 51, and therefore the first bar 11 and the second bar 12 are weighted. Even a product can be stably supported. In addition, even if the first bar 11 and the second bar 12 supported by the bar support 10 are heavy, the engagement piece 20 attached to the bar support 10 is engaged with the wheel 30. Therefore, the bar support portion 10 can be rotated with a small force.

  Next, a sheet material position adjusting device 2 (hereinafter simply referred to as “position adjusting device 2”) according to the second embodiment will be described with reference to FIG. The position adjusting device 2 includes a first bar 11 that does not rotate, a pair of bar support portions 10 that are attached to both ends of the first bar 11 and supports the first bar 11 horizontally, and a pair of bar support portions 10. Both end portions are attached, parallel to the first bar 11 with a gap therebetween, and supported at a height different from that of the first bar 11, the non-rotating second bar 12, the first bar 11 and the second bar A groove that includes a pair of engaging pieces 20 each having an arcuate portion 21 that is a part of an imaginary circle C centered on an imaginary point P located between the bar 12 and that engages with the arcuate portion 21 A pair of wheels 30 that are formed on the peripheral surface and are rotatable about a vertical axis 37 with respect to each of the pair of engagement pieces 20 and that are respectively erected from a pedestal 50 placed on the installation surface. The pair of bar support portions 10 is temporarily attached to the fixed support portion 51 of the A rotation support mechanism M that is rotatably supported around the point P and a drive device that applies a horizontal force to at least one of the pair of bar support portions 10 are provided. In the rotation support mechanism M, the pair of engagement pieces 20 are provided. These are attached to the inside of each of the pair of fixed support portions 51 to form an arcuate portion 21 along the inner periphery, and the wheel 30 is supported by the bar support portion 10.

  The position adjustment device 2 is different from the position adjustment device 1 in that the objects to which the engagement pieces 20 and the wheels 30 constituting the rotation support mechanism M are attached are opposite to each other. Specifically, a flat plate-like engagement piece 20 is attached to the inner side surface of each of the pair of fixed support portions 51 so as to project in a bowl shape in the horizontal direction, and the shape of the inner periphery thereof is an imaginary point P. Is a circular arc centered at. That is, the arcuate portion 21 is formed along the inner periphery of the engagement piece 20.

  On the other hand, on each outer surface of the pair of bar support portions 10, a flat plate-like wheel support portion 52 is provided so as to project in a bowl shape in the horizontal direction. The wheel 30 is pivotally supported on the upper surface of the wheel support 52 in a state where the peripheral surface protrudes outward from the wheel support 52. Two wheels 30 are provided for each of the pair of bar support portions 10. The configuration of each wheel 30 is the same as that of the wheel 30 of the position adjusting device 1, and the arcuate portion 21 of the engagement piece 20 is engaged with the groove 31 of the wheel 30. Further, the projecting piece 17 is attached to the bar support portion 10 at a position where it does not interfere with the wheel 30.

  In the position adjusting device 2 having the above configuration, the wheel 30 moves along the arcuate portion 21 of the engagement piece 20 by the operation of the cylinder device 40, and the support bar rotates around the vertical axis passing through the virtual point P together with the wheel 30. To do. Thereby, the same effect as said position adjustment apparatus 1 can be acquired.

  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 position adjusting devices 1 and 2 described above, the case where the cylinder device 40 is used as the driving device is illustrated, but the present invention is not limited to this, and the end portion of the bar support portion 10 is gripped and pushed and pulled in the horizontal direction. A manipulator or an articulated robot can be used.

  Further, in the position adjusting devices 1 and 2 described above, the case where one of the pair of bar support portions 10 is driven by the drive device is illustrated, but the present invention is not limited thereto, and both the pair of bar support portions 10 are driven by the drive device. It may be driven and synchronized.

  Further, in the position adjusting devices 1 and 2 described above, the case where the two wheels 30 are engaged with the single engagement piece 20 is illustrated, but the present invention is not limited to this, and the single engagement piece 20 is divided into three or more wheels. By the engagement of 30, it can support more stably.

1, 2 Position adjustment device 10 Bar support part 11 First bar 12 Second bar 20 Engagement piece (rotation support mechanism M)
21 Arc-shaped part 30 Wheel (Rotation support mechanism M)
31 groove 40 cylinder device (drive device)
50 Mounting base 51 Fixed support part P Virtual point C Virtual circle S Sheet material

JP 2007-261245 A

Claims (2)

A first bar that does not rotate,
A pair of bar support portions that are attached to both ends of the first bar and horizontally support the first bar;
A non-rotating second bar having both ends attached to the pair of bar support portions, parallel to and spaced apart from the first bar, and supported at a height different from the first bar;
A pair of engaging pieces each having an arcuate portion that is a part of a virtual circle centered on a virtual point located between the first bar and the second bar; A pair of grooves formed on the peripheral surface and rotatable about a vertical axis are provided with two or more wheels for each of the pair of engagement pieces, and a pair of erected from a mount placed on the installation surface. A rotation support mechanism for supporting a pair of the bar support portions on a fixed support portion so as to be rotatable around the virtual point;
A driving device that applies a horizontal force to at least one of the pair of bar support portions;
In the rotation support mechanism, each of the pair of engagement pieces is attached to the outside of each of the pair of bar support portions, and the outer peripheral surface is the arcuate portion, and the wheel is supported by the fixed support portion. An apparatus for adjusting the position of a sheet material. A first bar that does not rotate,
A pair of bar support portions that are attached to both ends of the first bar and horizontally support the first bar;
A non-rotating second bar having both ends attached to the pair of bar support portions, parallel to and spaced apart from the first bar, and supported at a height different from the first bar;
A pair of engaging pieces each having an arcuate portion that is a part of a virtual circle centered on a virtual point located between the first bar and the second bar; A pair of grooves formed on the peripheral surface and rotatable about a vertical axis are provided with two or more wheels for each of the pair of engagement pieces, and a pair of erected from a mount placed on the installation surface. A rotation support mechanism for supporting a pair of the bar support portions on a fixed support portion so as to be rotatable around the virtual point;
A driving device that applies a horizontal force to at least one of the pair of bar support portions;
In the rotation support mechanism, each of the pair of engagement pieces is attached to the inside of each of the pair of fixed support portions, and an inner peripheral surface is the arc-shaped portion, and the wheel is connected to the bar support portion. A sheet material position adjusting device characterized by being supported.

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