JP2008081258A - Paper processing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To form a highly accurate folding score with good processed shape capable of coping with the thickness of paper at an optional position in a direction orthogonal to the conveyance direction of the paper. <P>SOLUTION: A folding score forming part 10 has an upper crease roller 1 which has an annular projection part 3 along the outer periphery and rotates around the shaft center of a driven rotation shaft 6 along the direction orthogonal to the paper conveyance direction, an upper roller holding part 9 which holds the upper crease roller 1 and moves on an upper guide support rail 15, a lower crease roller 2 which has an annular recessed part 4 along the outer periphery and rotates around the shaft center of a driving shaft 7 along the direction orthogonal to the paper feeding direction, and a lower roller holding part 16 which holds the lower crease roller 2 and moves on a lower guide support rail 22. The paper 5 is held between the projection part 3 of the upper crease roller 1 and the recessed part 4 of the lower crease roller 2, and the reaction forces acting on the upper roller holding part 9 and the lower roller holding part 16 are received by the upper guide support rail 15 and the lower guide support rail 22, respectively. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sheet processing apparatus, and relates to a technique for forming a folding mold on a sheet along a sheet conveyance direction.

  Conventional paper processing apparatuses include those shown in FIG. The sheet processing apparatus includes a paper feed unit 111 at one end of the apparatus main body 110, a paper discharge unit 112 at the other end, and a transport unit 113 from the paper feed unit 111 to the paper discharge unit 112. The transport means 113 constitutes a transport path 115 composed of a large number of pairs of rollers 114.

  The transport unit 113 includes a transport drive unit (not shown) that drives the roller 114. On the transport path 115, the transport correction unit 116, the information reading unit 117, the first cutting device unit 118, and the second cutting device. Processing means such as a section 119, a third cutting apparatus section 120, a fourth cutting apparatus section 121, and a folding mold forming apparatus section 122 are provided. These are all unitized and are detachably supported by the apparatus main body 110, and these processing means are provided with processing drive means (not shown).

  Japanese Patent Application Laid-Open No. 2004-133867 discloses a conveying unit that conveys a sheet one by one, a cutting unit that is arranged along a sheet conveying path and cuts the sheet, a cut mark reading unit that reads a cut mark on the sheet, and the cut mark reading unit Discloses a technique including the transport unit and a control unit for controlling the operation of the cutting unit so as to cut the sheet based on the position of the cut mark read by the above.

  Japanese Patent Application Laid-Open No. 2004-228561 includes a cutting unit that transports a sheet one by one and cuts the sheet in the transport direction, a cutting unit that cuts the sheet in a direction orthogonal to the transport direction, and a fold forming unit that forms a folding mold on the sheet. The arrangement is disclosed, and a technique for moving and controlling the position of the cutting means or folding mold forming means is disclosed.

Japanese Patent Application Laid-Open No. 2003-228561 discloses a technique for grooving a sheet with a grooving disk in a state where the sheet is curved on the outer peripheral surface of a corresponding tool arranged in a direction orthogonal to the sheet conveyance direction.
JP-A-2005-239307 JP 2005-232700 A Japanese Patent Laid-Open No. 62-261432

  By the way, the above-described fold forming apparatus unit 122 includes a pair of upper and lower fold forming press dies, and forms a fold in a direction orthogonal to the transport direction on the paper. There are the following methods. That is, there are a method of forming a folding mold (horizontal crease) in a direction orthogonal to the paper transport direction and a method of forming a folding mold (vertical crease) along the paper transport direction.

  As shown in FIG. 8A, the folding mold forming pressing molds 201 and 202 having a pair of upper and lower linear shapes forming the horizontal crease are orthogonal to the folding mold forming pressing mold 201 in the sheet conveying direction. A convex portion 203 that forms a single protrusion extending in the direction is formed, and a concave portion 204 that forms a single groove extending in a direction orthogonal to the sheet conveying direction is formed in the other folding mold forming pressing die 202.

  Conveying roller devices 205 and 206 are arranged at the front and rear positions of the folding mold forming pressing dies 201 and 202 in the sheet conveying direction, and the conveying roller devices 205 and 206 are respectively a pair of upper and lower sheet conveying rollers 207, 207 and 208, 208 is provided.

  As shown in FIG. 8B, when forming the folding mold, the sheet 209 conveyed by the conveying roller devices 205 and 206 is sandwiched between the folding mold forming pressing molds 201 and 202, and the convex portion 203 and the concave portion are formed. When the sheet 204 is fitted through the sheet 209, a folding mold (lateral crease) in a direction orthogonal to the sheet conveyance direction is formed on the sheet 209.

  At the time of forming the lateral crease, the paper 206 is pushed into the concave portion 205 by the convex portion 203, so that the front and rear regions of the paper 206 are drawn into the folding mold forming pressing die 201 accordingly. In this way, the lateral crease extends in the direction perpendicular to the paper transport direction and is parallel to the paper transport rollers 206 and 207. Therefore, the lateral crease attracts the paper 209 as described above by stretching the paper, sliding on the rollers, and the like. The folding mold can be formed on the sheet with high accuracy following the mold shapes of the convex portions 203 and the concave portions 204 of the folding mold forming pressing dies 201 and 202.

  As shown in FIG. 8C and FIG. 8D, the folding mold forming pressing molds 301 and 302 having a pair of upper and lower rotating bodies that form the vertical crease are formed of one folding mold forming pressing mold 301. A convex portion 303 that forms an annular protrusion is formed on the outer peripheral surface, and a concave portion 304 that forms an annular groove is formed on the outer peripheral surface of the other folding mold forming pressing die 302.

  At the time of forming the folding mold, the sheet 209 conveyed by the conveying roller devices 205 and 206 is sandwiched between the both folding mold forming pressing molds 301 and 302, and the convex portion 303 and the concave portion 304 are fitted via the sheet 209. Thus, a folding mold (longitudinal crease) is formed on the sheet 209 along the sheet conveying direction.

  When this vertical crease is formed, the paper is pushed into the concave portion 304 by the convex portion 303, and the left and right regions of the paper are drawn into the folding die forming pressing die accordingly. However, it is difficult to draw and extend the paper 209 pinched by the upper and lower paper transport rollers 206 and 206 and 207 and 207 in the roller axis direction, and the convex portions 303 of the folding mold forming pressing dies 301 and 302 are difficult. In addition, it becomes difficult to form the folding mold with high accuracy following the mold shape of the recess 304.

By the way, as shown in FIG. 9A, the crease 401 forms a recess 402 on one surface of the paper 209 and a protrusion 403 on the other surface of the paper 209.
As shown in FIG. 9B, the folding of the paper 209 in the crease 401 is performed by bending the paper 209 on both sides of the crease 401 to the other surface side where the protrusions 403 are provided. At this time, the closer the corners a, b, c, and d of the crease 401 are to a right angle, the better the processed shape is, and the folded portion is sharp and highly accurate. However, as shown in FIG. 9C, the processed shape becomes poorer and the folded portion is deformed as the corner portions a, b, c, and d of the crease 401 are rounded.

  As described above, the horizontal crease can form the folding mold on the sheet with high accuracy following the mold shapes of the projections 203 and the depressions 204 of the folding mold forming pressing molds 201 and 202, so that the folded portion is sharp. It becomes a highly accurate shape. However, since the vertical crease is difficult to form the folding mold with high accuracy following the mold shapes of the convex portions 303 and the concave portions 304 of the folding mold forming pressing dies 301 and 302, the folded portion has a collapsed shape. It is easy to become.

  When forming the vertical crease, the paper is more easily torn as the width of the convex portion 303 is reduced, and the processed shape of the vertical crease is likely to be poorer as the width of the concave portion 304 is increased. In addition, the reaction force received from the paper during processing acts in the direction in which the folding mold forming pressing dies 301 and 302 are separated from each other, resulting in a large processing accuracy error. Further, since the center distance between the folding mold forming pressing dies 301 and 302 is fixed, the center distance cannot be adjusted according to the thickness of the paper.

  The present invention solves the above-described problem, and can form a highly accurate folding mold with a favorable processing shape at an arbitrary position in a direction orthogonal to the paper transport direction, depending on the thickness of the paper. It is an object of the present invention to provide a sheet processing apparatus that can adjust the distance between the cores of the folding mold forming pressing mold and change the mold shape with a simple configuration.

  In order to solve the above-described problems, a paper processing apparatus according to the present invention includes a transport unit that transports a paper along a paper transport direction, and the paper is sandwiched on a paper transport path of the transport unit along the paper transport direction. A folding mold forming means for forming a folding mold, a moving means for moving the folding mold forming means in a direction perpendicular to the sheet conveying direction, and an upper and lower direction along the moving direction of the folding mold forming means and via the folding mold forming means. And a folding force forming member having an annular convex portion along the outer periphery, around the axis of the rotation axis along the direction perpendicular to the paper conveying direction. A first roller that rotates, a first roller holding portion that holds the first roller and moves on one reaction force support member, an annular recess along the outer periphery, and orthogonal to the paper transport direction Second roller that rotates about the axis of the rotation axis along the direction of rotation A second roller holding portion that holds the second roller and moves on the other reaction force supporting member, and holds the sheet between the convex portion of the first roller and the concave portion of the second roller. The reaction force acting on the first roller holding portion and the second roller holding portion is received by the respective reaction force support members.

Further, the shape of the convex portion and the concave portion is set based on the type and thickness of the paper.
In addition, when the paper type and the thickness standard are coated paper having an average thickness of 0.24 mm, the convex portion has a width of 0.8 mm, the concave portion has a width of 1.2 mm, and the convex portion protrudes into the concave portion. It is characterized by being 0.4 mm.

  The first roller is driven to rotate around the axis of the driven rotary shaft, the second roller is driven to rotate about the axis of the driven rotary shaft, and the first roller holding portion has an eccentric operation means, The eccentric operation means holds the driven rotary shaft of the first roller within a predetermined range so as to be able to approach and separate from the driven rotary shaft of the second roller.

In addition, a guide member is provided that forms guide surfaces parallel to the paper conveyance direction at positions on both sides of the first roller in the axial direction of the driven rotation shaft.
The second roller has a plurality of types of recesses having different widths, and the first roller detachably mounted on the rotating shaft has a plurality of types of projections corresponding to the recesses of the second roller. It is possible to replace it with one.

  As described above, according to the present invention, the first roller and the second roller of the folding mold forming unit can be moved to arbitrary positions orthogonal to the paper conveyance direction, and the conveyance direction can be moved to a predetermined position on the paper. Can be accurately formed, and the structure can be changed to a structure having appropriate processing conditions corresponding to the thickness of the paper to be processed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram for explaining the principle operation of the paper processing apparatus of the present invention. As shown in FIG. 1 (b), in the paper processing apparatus of the present invention, the crease forming part 10 forming the fold forming means forms the upper crease roller 1 forming the first roller and the lower crease roller forming the second roller. 2, the upper crease roller 1 has an annular convex portion 3 along the outer periphery, and the lower crease roller 2 has an annular concave portion 4 along the outer periphery. The folding mold forming means sandwiches the paper 5 between the convex portion 3 of the upper crease roller 1 and the concave portion 4 of the lower crease roller 2 to form a folding die 5a along the paper transport direction.

  The shapes of the convex portion 3 and the concave portion 4 are set based on the type and thickness of the paper 5. There are various types of paper 5. In this embodiment, the paper 5 is a coated paper having an average thickness of 0.24 mm. Coated paper is paper coated with a coating agent, and is used in catalogs, posters, flyers, pamphlets and the like. In this embodiment, the width a of the convex portion 3 is 0.8 mm, the width b of the concave portion 4 is 1.2 mm, the dimension c that the convex portion 3 protrudes into the concave portion 4 is 0.4 mm, and the depth d of the concave portion 4 is. The distance e between the outer peripheral surfaces of the convex portion 3 and the concave portion 4 is 0.9 mm, and the movement allowance f of the upper crease roller 1 is 0.6 mm.

  As shown in FIGS. 2 to 5, in the sheet processing apparatus 50, a sheet conveying roller unit 20 as a conveying unit that conveys the sheet 5 along the sheet conveying direction is positioned at the front and rear positions of the folding mold forming apparatus in the sheet conveying direction. I have it. Each paper transport roller unit 20 has a pair of upper and lower transport rollers 20a, and the paper 5 is sandwiched between the transport rollers 20a and transported in the paper transport direction.

  The sheet processing apparatus 50 includes a pair of left and right folding mold forming units 10 in a direction orthogonal to the sheet conveyance direction. In each folding mold forming unit 10, the upper crease roller 1 rotates around the axis of the driven rotation shaft 6 along the direction orthogonal to the sheet conveyance direction, and the lower crease roller 2 is driven mainly along the direction orthogonal to the sheet conveyance direction. The rotary shaft rotates around the axis of the drive shaft 7. A key groove 8 is formed over the entire length of the drive shaft 7, and the lower crease roller 2 is movable in the axial direction of the drive shaft 7 and is engaged with the key groove 8 around the axis of the drive shaft 7. Yes.

  The upper roller holding portion 9 that holds the upper crease roller 1 holds a pair of upper guide shafts 11 arranged along a direction orthogonal to the sheet conveying direction so that the upper slider portion 12 can move in the axial direction. The moving means for moving the upper roller holding portion 9 in a direction perpendicular to the sheet conveying direction includes an upper moving shaft 13 that forms a ball screw arranged in parallel with the upper guide shaft 11 and an upper nut portion 14 that is screwed to the upper moving shaft 13. Become.

  The upper roller holding portion 9 has a support bearing 9 a that abuts on an upper guide support rail 15 that is a reaction force support member arranged in parallel with the upper guide shaft 11, and the support bearing 9 a is above the upper guide support rail 15. Roll on.

  The lower roller holding portion 16 that holds the lower crease roller 2 holds a pair of lower guide shafts 17 arranged along a direction orthogonal to the sheet conveying direction so that the lower slider portion 18 can move in the axial direction. A moving means for moving the lower roller holding portion 16 in a direction perpendicular to the sheet conveying direction includes a lower moving shaft 19 that forms a ball screw arranged in parallel with the lower guide shaft 17 and a lower nut portion 21 that is screwed to the lower moving shaft 19. Become.

  Further, the lower roller holding portion 16 has a support bearing 16 a abutting against a lower guide support rail 22 that is a reaction force support member arranged in parallel with the lower guide shaft 17, and the support bearing 16 a is above the lower guide support rail 22. Roll on.

  The upper roller holding portion 9 has a guide member 23, and the guide member 23 forms guide surfaces parallel to the sheet conveyance direction at both side positions of the upper crease roller 1 in the axial direction of the driven rotation shaft 6.

  One upper moving shaft 13 screwed to the upper nut portion 14 of one folding mold forming portion 10 and one lower moving shaft 19 screwed to the lower nut portion 21 are interlocked by a timing belt 24 to move upward. A gear 25 provided at the end of the shaft 13 is linked to a drive system (not shown). Similarly, the other upper moving shaft 13 screwed to the upper nut portion 14 of the other folding mold forming portion 10 and the other lower moving shaft 19 screwed to the lower nut portion 21 are interlocked by the timing belt 24. The gear 25 provided at the end of the upper moving shaft 13 is linked to a drive system (not shown). A gear 26 provided at an end of the drive shaft 7 is interlocked with a drive system 28 by a timing belt 27. With this configuration, the left and right folding mold forming sections 10 move independently, and the upper roller holding section 9 and the upper crease roller 1, the lower roller holding section 16 and the lower crease roller 2 of each folding mold forming section 10 are synchronized. Move.

  The upper roller holding portion 9 has an eccentric operation means, and the eccentric operation means is an eccentric ring 31 arranged to be rotatable around an axis parallel to the driven rotary shaft 6, and an operation lever 32 provided on the eccentric ring 31. And a stopper 34 that loosely fits in a long hole 33 formed in the eccentric ring 31 and restricts the rotational range of the eccentric ring 31, and a lock screw 35 that fixes and holds the eccentric ring 31, and the eccentric ring 31 has its own rotational axis. The driven rotary shaft 6 is rotatably held at a position eccentric from the center.

  When the operation ring 32 is operated with the lock screw 35 loosened to rotate the eccentric ring 31, the driven rotation shaft 6 approaches and separates within a predetermined range from the drive shaft 7, and the upper crease roller 1 and the lower crease roller 2 are separated. The distance changes, and the dimension c by which the convex portion 3 projects into the concave portion 4 changes.

  The sheet processing apparatus 50 includes an upper sheet guide 36 and a lower sheet guide 37 at a position upstream of the folding mold forming unit 10 in the sheet conveying direction, and the sheet 5 fed by the sheet conveying roller unit 20 and the upper sheet guide 36. A lower paper guide 37 guides between the upper crease roller 1 and the lower crease roller 2. Further, the sheet processing apparatus 50 includes a roller presser 38. The roller presser 38 presses against the upper transfer roller 20a while rolling, thereby equalizing the clamping pressure between the transfer rollers 20a.

  Hereinafter, the operation of the above-described configuration will be described. At the time of forming the folding mold, the structure is changed to a structure having appropriate processing conditions corresponding to the thickness and type of the paper 5 to be processed. That is, the operation lever 32 is operated with the lock screw 35 loosened, the eccentric ring 31 is rotated, and the driven rotary shaft 6 is moved closer to and away from the drive shaft 7 within a predetermined range. The distance c of the crush roller 2 is changed to adjust the dimension c that the convex portion 3 projects into the concave portion 4. By this adjustment, an appropriate folding mold (vertical crease) can be formed according to the thickness and type of the paper 5, and the folding mold can be formed with high accuracy following the mold shapes of the convex portions 3 and the concave portions 4. Can do.

  When forming the folding mold, the sheet 5 is conveyed to the folding mold forming section 10 by passing between the upper sheet guide 36 and the lower sheet guide 37 by the sheet conveying roller section 20 on the upstream side in the sheet conveying direction. The folding mold forming unit 10 sandwiches the paper 5 between the convex portion 3 of the upper crease roller 1 and the concave portion 4 of the lower crease roller 2, and the lower crease roller 2 is principally rotated by the drive shaft 7. As a result, the upper crease roller 1 is driven to rotate around the axis of the driven rotary shaft 6, thereby forming a folding die 5 a along the paper transport direction on the paper 5. At this time, the reaction force acting on the upper roller holding portion 9 and the lower roller holding portion 16 can be received by the upper guide support rail 15 and the lower guide support rail 16 via the respective support bearings 9a and 16a. Formation can be performed stably and with high accuracy.

  The left and right folding mold forming units 10 move independently, and are driven in the direction perpendicular to the sheet conveying direction along the upper guide shaft 11 and the lower guide shaft 17 by driving the upper moving shaft 13 and the lower moving shaft 19. Therefore, the folding mold 5a along the transport direction can be accurately formed at a predetermined position of the paper 5.

  As another embodiment, as shown in FIGS. 6 and 7, a plurality of types of recesses 4 having different widths are formed in the lower crease roller 2, and the upper crease roller 1 is attached to the driven rotary shaft 6 by mounting screws 39. It is also possible to attach it detachably. In this case, a plurality of types of upper crease rollers 1 having convex portions 3 corresponding to the respective concave portions 4 of the lower crease roller 2 are prepared. Each upper crease roller 1 has a shape in which the position L of the convex portion 3 in the axial direction is adjusted so that the convex portion 3 corresponds to each concave portion 4.

  When forming the folding mold, the combination of the convex portion 3 and the concave portion 4 is selected and the upper crease roller 1 is replaced so as to realize an appropriate processing condition corresponding to the thickness and type of the paper 5 to be processed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining the principle operation of forming a folding mold according to the present invention, in which FIG. The perspective view which shows the folding mold | type part in embodiment of this invention Front view showing the same folding mold forming part Sectional view showing the folding mold forming part 1 shows a sheet processing apparatus according to an embodiment of the present invention, where (a) is a front view, (b) is a bottom view, and (c) is a view with a lower sheet guide attached. The perspective view which shows the folding mold | type part in embodiment of this invention The figure which shows the principal part of the same folding mold formation part Explanatory drawing showing a conventional crease forming method Explanatory drawing showing a conventional crease forming method Schematic diagram showing a conventional paper processing device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper crease roller 2 Lower crease roller 3 Convex part 4 Concave part 5 Paper 5a Folding type 6 Driven rotating shaft 7 Drive shaft 8 Keyway 9 Upper roller holding part 9a Support bearing 10 Folding type formation part 11 Upper guide shaft 12 Upper slider part 13 Upper moving shaft 14 Upper nut portion 15 Upper guide support rail 16 Lower roller holding portion 16a Support bearing 17 Lower guide shaft 18 Lower slider portion 19 Lower moving shaft 20 Paper transport roller portion 20a Transport roller 21 Lower nut portion 22 Lower guide support rail 23 Guide members 24 and 27 Timing belts 25 and 26 Gear 28 Drive system 31 Eccentric ring 32 Operation lever 33 Long hole 34 Stopper 35 Lock screw 36 Upper paper guide 37 Lower paper guide 38 Roller presser 39 Mounting screw 50 Paper processing device

Claims (6)

A conveying unit configured to convey a sheet along a sheet conveying direction; a folding unit forming unit configured to sandwich a sheet on a sheet conveying path of the conveying unit to form a folding mold along the sheet conveying direction; A moving means that moves in a direction perpendicular to the paper transport direction, and a reaction force support member that is arranged in parallel with the upper and lower positions via the folding mold forming means along the moving direction of the folding mold forming means,
The folding mold forming means has a first roller that has an annular convex portion along the outer periphery, rotates around the axis of the rotation axis along the direction orthogonal to the paper transport direction, and the first roller. A first roller holding portion that moves on one reaction force support member, an annular recess along the outer periphery, and a first rotation portion that rotates about the axis of the rotation axis along a direction orthogonal to the paper transport direction. 2 and a second roller holding portion that holds the second roller and moves on the other reaction force support member, and includes a convex portion of the first roller and a concave portion of the second roller. A sheet processing apparatus characterized in that a sheet is sandwiched between the sheets, and reaction forces acting on the first roller holding section and the second roller holding section are received by the respective reaction force support members.   The paper processing apparatus according to claim 1, wherein the shape of the convex portion and the concave portion is set based on a type and a thickness of the paper.   When the standard of paper type and thickness is coated paper with an average thickness of 0.24 mm, the convex portion has a width of 0.8 mm, the concave portion has a width of 1.2 mm, and the convex portion protrudes into the concave portion. The paper processing apparatus according to claim 2, wherein the paper processing apparatus is 4 mm.   The first roller is driven to rotate around the axis of the driven rotary shaft, the second roller is driven to rotate about the axis of the driven rotary shaft, and the first roller holding portion has an eccentric operation means, and the eccentric operation is performed. 2. The sheet processing apparatus according to claim 1, wherein the means holds the driven rotation shaft of the first roller so that the driven rotation shaft of the second roller can be approached and separated within a predetermined range.   The sheet processing apparatus according to claim 1, further comprising guide members that form guide surfaces parallel to the sheet conveyance direction at positions on both sides of the first roller in the axial direction of the driven rotation shaft.   The second roller has a plurality of types of recesses having different widths, and the first roller that is detachably mounted on the rotating shaft has a plurality of types of projections corresponding to the respective recesses of the second roller. The paper processing apparatus according to claim 1, wherein the paper processing apparatus is replaceable with the paper processing apparatus.

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