JP2023115754A - Folding device - Google Patents

Abstract

To provide a folding device capable of properly folding a sheet without hindering a folding operation by a roller for conveying the sheet when folding the sheet while holding the sheet on a conveyance path.SOLUTION: In a folding device 1 of the present invention, a conveyance part 2 is provided with: a nipping roller 28 that nips and conveys a sheet S between itself and a conveyance roller; and a retraction part that retracts the nipping roller 28 from a conveyance path 20 when the sheet is folded in a folding part. The folding part is provided with: a holding part 71 that holds a holding piece of the sheet on the conveyance path 20; and a folding part that folds a folded piece of the sheet to a position opposite to the holding piece held by the holding part 71, the folding part being provided with a folding roller capable of nipping and conveying the folded sheet between itself and the conveyance roller.SELECTED DRAWING: Figure 2

Description

The present invention relates to a folding device.

2. Description of the Related Art Conventionally, a folding device for folding a conveyed sheet is known. Japanese Unexamined Patent Application Publication No. 2002-200002 discloses a folding device capable of suppressing displacement of folding positions of sheets to be folded.

JP-A-2015-199561

In the apparatus described in Patent Document 1, the sheet is folded while being conveyed by folding rollers. In this case, the folding rollers can continuously perform the folding process while nipping and conveying the sheet at all times, resulting in good working efficiency. Such folding rollers can be used to fold relatively thin sheets such as copy paper and letters. On the other hand, if the sheet is thicker than a predetermined value, for example, corrugated cardboard for manufacturing a box for storing bottles of alcoholic beverages, a box for storing business cards, cardboard for holders with pockets that can hold catalogs, flyers, etc. It is difficult to perform folding processing using folding rollers.

If the sheet is thicker than a predetermined value, there is a method of folding the sheet by holding the sheet on the conveying path and moving the portion of the sheet to be folded toward the position facing the sheet held on the conveying path. However, when the portion of the sheet to be folded is brought close to the portion held on the conveying path, if the sheet itself is nipped by the conveying rollers, there is a risk that it will be difficult to properly fold the sheet.

SUMMARY OF THE INVENTION An object of the present invention is to provide a folding device capable of properly folding a sheet while holding the sheet on a conveying path without interfering with the folding operation by the rollers that convey the sheet. be.

In order to solve the above-described problems, the folding device of the present invention includes a conveying section provided with conveying rollers for conveying sheets, and a folding section for folding the sheets conveyed by the conveying rollers. a nipping roller for nipping and conveying the sheet between itself and the conveying roller; and a retracting section for retracting the nipping roller from the conveying path when the sheet is folded by the folding section. The unit includes a holding portion that holds the holding piece of the sheet on the conveying path, and a folding portion that folds the folded piece of the sheet to a position facing the holding piece held by the holding portion,
The folding unit is provided with folding rollers capable of pinching and transporting the folded sheet between itself and the transport rollers.

Further, in the configuration, a control unit is provided for controlling whether the nipping roller or the folding roller is used to convey the folded sheet based on the form of the folded sheet.

According to the present invention, the conveying section includes a nipping roller that nips and conveys the sheet between itself and the conveying roller, and the nipping roller is retracted from the conveying path when the sheet is folded by the folding section. The folding section includes a holding section that holds the holding piece of the sheet on the conveying path, and the folded piece of the sheet is folded back to a position facing the holding piece held by the holding section. A folding portion is provided, and the folding portion is provided with folding rollers capable of pinching and transporting the folded sheet between itself and the conveying roller. A sheet can be nipped and conveyed between them.

Further, in the case where a control unit is provided for controlling whether the nipping roller or the folding roller is used to convey the folded sheet based on the form of the sheet to be folded, Accordingly, the sheet can be conveyed downstream by the conveying roller and the nipping roller when it is difficult to convey the sheet by the conveying roller and the turn-back roller.

1 is a longitudinal sectional view showing a schematic configuration of a folding device according to one embodiment of the present invention; FIG. It is a top view of the said folding apparatus. Fig. 3 is an enlarged perspective view of a first folding section and conveying rollers of the folding device; 4 is a plan view of the first folding section and conveying rollers; FIG. It is the figure which looked at the said 1st folding part and a conveyance roller from the upstream. FIG. 6 is a cross-sectional view taken along line AA of FIG. 5; FIG. 4 is a view showing how the first folding section and the conveying roller are used; FIG. 4 is a view showing how the first folding section and the conveying roller are used; FIG. 4 is a view showing how the first folding section and the conveying roller are used; It is a perspective view of a pinch roller and a support unit of the folding device. 4 is a plan view of the nipping roller and the support unit; FIG. It is the figure which looked at the said pinch roller and the said support unit from the front view. It is a vertical cross-sectional view of the said pinch roller and the said support unit. It is a usage mode figure of the said pinch roller and the said support unit. 4 is a plan view of a sheet processed by the folding device; FIG. 4 shows each step when the sheet is sequentially folded. It is a usage mode figure of the said folding apparatus. It is a usage mode figure of the said folding apparatus. It is a usage mode figure of the said folding apparatus. It is a usage mode figure of the said folding apparatus. It is a usage mode figure of the said folding apparatus. FIG. 8 is a plan view of a sheet processed by a folding device according to another embodiment of the present invention; It is a usage mode figure of the said folding apparatus. It is a usage mode figure of the said folding apparatus. It is a usage mode figure of the said folding apparatus. FIG. 11 is a plan view of a sheet processed by a folding device according to still another embodiment of the present invention; It is a usage mode figure of the said folding apparatus.

(First embodiment)
FIG. 1 is a longitudinal sectional view showing a schematic configuration of a folding device 1 according to a first embodiment of the present invention, and FIG. 2 is a plan view of the folding device 1. As shown in FIG. The folding device 1 has a first mechanism 101 and a second mechanism 102 . The first mechanism 101 is provided with the supply section 16 , skew correction section 4 , vertical crease section 5 and horizontal crease section 6 . The second mechanism 102 is provided with the folding section 7 , the glue applying section 3 , the pressing section 8 and the discharging section 17 .

The folding device 1 also includes a control section 9 within the device main body 10 for controlling the operation of the entire device. A conveyance path 20 is formed from the supply section 16 to the discharge section 17 by the conveyance section 2 having a plurality of rollers 19 for pinching and conveying the sheet S. As shown in FIG.

The supply unit 16 includes a supply tray 94 and a suction transport unit 95 . Sheets S are placed on the supply tray 94 . The supply tray 94 is raised and lowered by an elevator (not shown). The suction transport section 95 includes a suction box 96 and a transport belt 97 . Suction box 96 is connected to blower 98 shown in FIG. A negative pressure is generated in the suction box 96 by driving the air blower 98 , and the uppermost sheet S on the supply tray 94 is attracted to the lower surface of the conveying belt 97 .

The skew corrector 4 includes a guide 41 and a skew belt 42 . The side edges of the sheet S contact the guide 41 . As the skew belt 42 runs, the sheet S is conveyed toward the guide 41 and is conveyed downstream while one side edge is in contact with the guide 41 .

The vertical crease portion 5 forms folds C (see FIG. 15) in the sheet S along the conveying direction F. As shown in FIG. The vertical crease portion 5 includes a vertical crease blade 501 , a spacing portion 53 and a lateral movement portion 54 . The vertical crease blade 501 has an upper member 51 and a lower member 52 . The upper member 51 is installed above the transport path 20 . The upper member 51 is formed in a disc shape and has a groove formed on its peripheral surface. The lower member 52 is installed below the conveying path 20 at a position facing the upper member 51 . The lower member 52 is formed in the shape of a disk having substantially the same radius as the upper member 51, and a convex portion that engages with the concave groove is formed on the peripheral surface. The separating portion 53 separates the upper member 51 from the lower member 52 . The lateral movement unit 54 moves the upper member 51 and the lower member 52 integrally in the width direction W perpendicular to the transport direction F. As shown in FIG.

The lateral crease portion 6 forms a crease C in the sheet S along the width direction W. As shown in FIG. The lateral crease portion 6 includes a concave member 61 , a convex member 62 and an elevating portion 63 . The concave member 61 is installed above the conveying path 20 and is lifted and lowered by the lifter 63 . The convex member 62 faces the concave member 61 and is installed below the transport path 20 .

The folding unit 7 folds the sheet S conveyed by the conveying rollers 27 . The folding section 7 includes 1-4 folding sections 11-14. The first, second, and fourth folding units 11 , 12 , and 14 are horizontal folding units that fold the sheet S at a horizontal fold line Cw along the width direction W perpendicular to the conveying direction F of the conveying unit 2 . . The third folding unit 13 is a vertical folding unit that folds the sheet S along the vertical folding line Cf along the conveying direction of the conveying unit 2 .

The folding section 7 is provided with a holding section 71 , a folding section 72 and a rotating section 73 . The holding portion 71 holds the holding piece of the sheet S on the conveying path 20 . The folding portion 72 folds back the folded piece of the sheet S to a position facing the holding piece of the sheet S held by the holding portion 71 . The rotating portion 73 rotates the folding unit 750 in which the folding member 721 of the folding portion 72 and the first folding roller 50 are housed by 180 degrees beyond the sheet S conveying surface.

At this time, the nipping roller 28 facing the conveying roller 27 via the conveying surface of the sheet S is retracted from the conveying path 20 by the retracting portion 39 .

After the rotating portion 73 rotates the folding unit 750 , the sheet S is transported downstream by the transport roller 27 and the folding roller 90 facing the transport roller 27 , or the folding unit 750 is rotated by the rotating portion 73 . After returning to the original position, the nipping roller 28 is opposed to the conveying roller 27, and the sheet S is nipped between the conveying roller 272 and the nipping roller 28 and conveyed downstream.

The first folding section 11 is installed on the most upstream side among the four folding sections 7 . The first folding portion 11 includes a first holding portion 47 and a first folded portion 46 . The first folding portion 46 includes a first folding member 45 , a first folding roller 50 and a first rotating portion 48 . The first rotating portion 48 has the first rotating shaft 49 as its axis, and reverses the folding unit 750 in which the first folding member 45 and the first folding roller 50 are accommodated, toward the downstream side beyond the conveying surface of the sheet S. . The first folded member 45 faces the first holding portion 47 on the downstream side. Also, the first turn-back roller 50 faces the conveying roller 272 on the downstream side.

After the first rotating portion 48 rotates the folding unit 750, the sheet S is transported downstream by the transport roller 272 and the first folding roller 50 facing the transport roller 272, or the first rotating portion 48 The folding unit 750 is returned to the original position by , the nipping roller 282 is opposed to the conveying roller 272, and the sheet S is nipped between the conveying roller 272 and the nipping roller 282 and conveyed downstream.

The second folding section 12 is installed downstream of the first folding section 11 . The second folding portion 12 includes a second holding portion 57 and a second folded portion 56 . The second folding portion 56 includes a second folding member 55 , a second folding roller 60 and a second rotating portion 58 . The second rotating section 58 conveys the sheet S through a folding unit 750 in which the second folding member 55 and the second folding roller 60 are accommodated, toward the second holding section 57 on the upstream side, with the second rotating shaft 59 as the axis. Flip upstream across the face. The second folded member 55 faces the second holding portion 57 on the upstream side. Also, the second turn-back roller 60 faces the transport roller 272 on the upstream side.

At this time, the nipping roller 282 above the transport roller 272 is retracted from the transport path 20 by the second retracting portion 22 . In the first folding section 11, the folding unit 750 having the first folding member 45 is rotated about the rotary shaft 74 from the upstream side to the downstream side in the sheet S conveying direction F. In the folding section 12 , the folding unit 750 is rotated about the second rotating shaft 59 from the downstream side in the conveying direction of the sheet S toward the upstream side.

After the second rotating section 58 rotates the folding unit 750 , the sheet S is conveyed downstream by the conveying roller 272 and the second folding roller 60 at the folding position, or is folded by the second rotating section 58 . The unit 750 is returned to its original state, the nipping roller 282 is moved from the retracted position to the nipping position, and the sheet S is nipped between the conveying rollers 272 and the nipping roller 282 and conveyed downstream.

The third folding section 13 is located downstream of the second folding section 12 and between the two glue application sections 3 . The third folding section 13 includes a third holding section 67, a third folding section 66, and a moving section (not shown). The third folded portion 66 has a third rotating portion 68 .

As shown in FIG. 2, the third holding portion 67 and the third folded portion 66 are arranged side by side in the width direction W. As shown in FIG. The third rotating portion 68 rotates around the third rotating shaft 69 toward the third holding portion 67 provided adjacent to the third folding member 65 in the width direction W. As shown in FIG. At this time, it is retracted from the transport path 20 by the nipping roller 284 above the transport roller 274 and the fourth retracting portion 24 . The moving part moves the third folding part 66 and the third holding part 67 together in the width direction W in line with the position of the folding line C. As shown in FIG.

The fourth folding section 14 is installed downstream of the second glue applying section 32 . The fourth folding portion 14 has a fourth folding portion 76 and a fourth holding portion 77 . The fourth folding portion 76 includes a fourth folding member 75 , a fourth folding roller 80 and a fourth rotating portion 78 . The fourth rotating section 78 conveys the sheet S through a folding unit 750 in which the fourth folding member 75 and the fourth folding roller 80 are accommodated, toward the fourth holding section 77 on the upstream side, with the fourth rotating shaft 79 as the axis. Flip upstream across the face. The fourth folded member 75 faces the fourth holding portion 77 on the upstream side. Also, the fourth turn-back roller 80 faces the transport roller 275 on the upstream side.

At this time, the nipping roller 285 above the transport roller 275 is retracted from the transport path 20 by the fifth retracting portion 25 .

In the fourth folding section 14 , similarly to the second folding section 12 , the folding unit 750 is rotated about the rotation shaft 74 from the downstream side in the sheet S conveying direction to the upstream side.

After folding the sheet S, the sheet S is conveyed downstream by the conveying roller 275 and the second folding roller 80 at the folding position, or the folding unit 750 is returned to its original state by the fourth rotating section 78 . Then, the nipping roller 285 is moved from the retracted position to the nipping position, and the sheet S is nipped between the conveying roller 275 and the nipping roller 285 and conveyed downstream.

3 is an enlarged perspective view of the first folding section 11 and the conveying roller 272 on the downstream side of the first folding section 11. FIG. 4 is a plan view of FIG. 3. FIG. FIG. 5 is a diagram of FIG. 3 viewed from the upstream side. 6 is a cross-sectional view taken along the line AA of FIG. 5. FIG.

The holding section 71 includes a holding base 711 and a suction section 712 . A plurality of vents 713 are formed in the holding base 711 . The suction unit 712 sucks the sheet S on the holding table 711 and holds it on the holding table 711 . The suction unit 712 includes a connection member 714, a switching unit 715, and a negative pressure generator (not shown). The connecting member 714 is made of a flexible pipe. A plurality of connection members 714 are installed along the width direction W. As shown in FIG. One end of the connecting member 714 is connected to the vent 713 and the other end is connected to the switching portion 715 . The switching unit 715 switches the range in which the sheet S is sucked onto the holding table 711 and held as the negative pressure generating device is driven.

The folding portion 72 includes a folding member 721 , a folding roller 90 and a rotating portion 73 . The folding member 721 and the folding roller 90 extend in the width direction W. As shown in FIG. The folding member 721 and the folding roller 90 are positioned at a support position below the conveying path 20 when the sheet S is not folded. The folding member 721 and the folding roller 90 support the sheet S conveyed on the conveying path 20 from below at the support position. The first folding member 45 and the folding roller 90 of the first folding section 46 constituting the first folding section 11 shown in FIG. located on the side.

In this embodiment, the folding member 721 is formed in the shape of a hollow square cylinder. However, the folding member 721 is not limited to this, and may have a triangular or other polygonal cross-section, may be formed in a prismatic shape, or may have another shape such as a plate shape or a cylinder shape. Both left and right ends of the folded member 721 are supported by supporting portions 731 via bearings 723 . Also, the folding member 721 is biased by a biasing member 727 .

The folding roller 90 is divided into three parts in the width direction W in this embodiment. However, the folding roller 90 may not be divided, and may be a single roller extending along the width direction W. Both ends in the width direction W of each folding roller 90 are rotatably supported by supporting portions 731 via bearings 724 . Also, the folding rollers 90 are biased by biasing members 728 respectively. After folding the sheet S, the folding back roller 90 can pinch and transport the folded sheet S between itself and the transport roller 27 .

The rotating portion 73 moves the folding member 721 and the folding roller 90 from the supporting position shown in FIG. 6 to the folding position shown in FIG. The rotating portion 73 includes a support portion 731 , a rotating shaft 74 , a power transmission portion 736 , a link mechanism 733 and a folding driving portion 732 . The support portion 731 has a housing 738 and a connecting member 739 .

The housing 738 is formed in a rectangular parallelepiped shape elongated in the width direction W, and has an open upper surface at the support position. The folding member 721 and the plurality of folding rollers 90 are housed inside the housing 738 and rotatably supported. A guide 737 is provided in the housing 738 . The guide 737 guides the sheet S. A connecting member 739 connects the housing 738 to the rotating shaft 74 . The folding roller 90 , the folding member 721 and the supporting portion 731 constitute a folding unit 750 .

The rotating shaft 74 is installed outside the housing 738 in the width direction W and is rotatably supported by the side plate 70 . The rotating shaft 74 is connected to the folding drive section 732 via a power transmission section 736 .

The link mechanism 733 is a mechanism for releasing the pressing force of the folding member 721 pressing the sheet S against the holding table 711 at the folding position shown in FIG. 7 and appropriately conveying the folded sheet S. is. A pair of left and right link mechanisms 733 are installed. The link mechanism 733 is provided between the left and right ends of the housing 738 and the side plate 70 .

FIG. 8 is a cross-sectional view taken along line BB of FIG. 5, showing an enlarged view of the link mechanism 733 and its surroundings. The folding unit 750 is in the folding position in FIG. 8(a) and in the transporting position in FIG. 8(b). The link mechanism 733 has a link member 734 and a receiving portion 749 . The link member 734 has a substantially rectangular plate shape in a side view, and has a notch 743 in part.

The notch 743 is provided on the right side of the link member 734 in FIG. 8 and has a rectangular shape. A shaft portion 725 is accommodated in the notch 743 . Axial portion 725 is movable within notch 743 . The shaft portion 725 is provided so that the left and right end portions of the folded member 721 protrude outward from the bearing 723 .

The link member 733 further includes a convex portion 751 and a joint portion 746 . The convex portion 751 is provided in the central portion of the link member 733 in FIG. The convex portion 751 is formed in a cylindrical shape and protrudes from the side surface of the link member 734 toward the side plate 70 .

The joint portion 746 is provided on the left side of the link member 734 in FIG. The joint portion 746 rotatably connects the link member 734 and the connecting member 739 of the folding unit 750 to each other.

The receiving portion 749 is positioned below the convex portion 751 in the folded position shown in FIG. 8(a). The receiving portion 749 is formed in a plate shape, and is installed so as to protrude from the side plate 70 toward the inside where the link member 734 is located. When the folding unit 750 rotates counterclockwise in FIG. 8A from the folding position shown in FIG. contacts the receiving portion 749 .

When the sheet S is not folded, the folding member 721 and the folding roller 90 are at supporting positions supporting the sheet S from below the conveying path 20, as shown in FIG. When folding the sheet S, the folding driving section 732 is driven, and the folding unit 750 is rotated 180 degrees about the rotating shaft 74 and turned over. As a result, as shown in FIG. 7, the folding member 721 and the folding roller 90 are moved to the folding position facing the holding base 711 and the conveying roller 27, respectively. As a result, the rotating portion 73 can rotate the folded piece toward the holding piece with the fold C formed in the sheet S as the center of rotation.

By further driving the folding drive section 732 from the folding position and rotating the folding unit 750 counterclockwise in FIG. It rotates over 180 degrees and moves to the transport position shown in FIG. As a result, the pressing force of the folding member 721 pressing the sheet S against the holding base 711 is released at the folding position shown in FIG. The folded member 721 moves a predetermined amount in a direction away from the holding table 711 , and a gap K is created between the holding table 711 and the folded member 721 . On the other hand, the folding roller 90 is strongly pressed against the conveying roller 27 . In this manner, the sheet S is conveyed downstream while the pressing force of the folding member 721 against the holding table 711 is released.

In the second and fourth folding sections 12 and 14, the arrangement of the holding section 71 and the folding section 72 is reversed from that of the first folding section 11 on the upstream side and the downstream side. Except for this point, the second and fourth folding sections 12 and 14 have substantially the same configuration as the first folding section 11 .

The glue applying section 3 shown in FIGS. 1 and 2 includes first and second glue applying sections 31 and 32 . The first glue applying part 31 is installed between the second folding part 12 and the third folding part 13 . The first glue application unit 31 applies glue to the sheet S along the width direction W. As shown in FIG. The first glue applying section 31 includes a first nozzle 81 , a first glue supplying section (not shown), and a first glue moving section 82 . The first nozzle 81 sprays the glue G from the first glue supply unit toward the sheet S to coat the sheet S with the glue G. As shown in FIG. The first glue supply section supplies the glue G to the first nozzle 81 . The first glue moving part 82 moves the first nozzle 81 in the width direction W. As shown in FIG.

The second glue applying part 32 is installed between the third folding part 13 and the fourth folding part 14 . The second glue application unit 32 applies glue to the sheet S along the width direction W. As shown in FIG. The second glue applying section 32 includes a second nozzle 91 , a second glue supplying section (not shown), and a second glue moving section 92 . The second nozzle 91 sprays the glue G from the second glue supply section toward the sheet S to coat the sheet S with the glue G. As shown in FIG. The second glue supply section supplies the glue G to the second nozzle 91 . The second glue moving part 92 moves the second nozzle 91 in the width direction W. As shown in FIG.

The pressing portion 8 presses the fold C of the sheet S. As shown in FIG. The pressing portion 8 includes a pair of upper and lower pressing members 85 and 86 and an elevating portion 87 . A pair of pressing members 85 and 86 are vertically opposed to each other with the transport path 20 interposed therebetween. The lifting section 87 lifts and lowers the pressing member 85 installed above the conveying path 20 toward the opposing pressing member 86 .

The processed sheet S is placed on the discharge portion 17 . The ejection section 17 includes an ejection tray 99 .

The transport unit 2 nips the sheet S and transports it from the supply unit 16 to the discharge unit 17 . The conveying section 2 includes a conveying roller 27 , a nipping roller 28 , a conveying driving section, and a retracting section 39 . The transport rollers 27 are installed below the transport path 20 . The conveying roller 27 is connected to a conveying driving section via a power transmission section (not shown).

The length in the width direction W of all the transport rollers 27 other than the transport roller 274 installed in the third folding section 13 is set longer than the length in the width direction W of the transport path 20 along which the sheet S is transported. be. The conveying rollers 274 installed in the third folding section 13 are shorter than the length in the width direction W of the conveying path 20 and have a length of about half.

The nipping rollers 28 are installed above the conveying path 20 . The nipping roller 28 nips and conveys the sheet S between itself and the conveying roller 27 . The nipping roller 28 rotates following the rotation of the opposing conveying roller 27 driven by the conveying drive unit. All the nipping rollers 28 of the first mechanism 101 and the most downstream nipping roller 28 of the second mechanism 102 have a length in the width direction W greater than the length in the width direction W of the transport path 20 along which the sheet S is transported. formed long. These nipping rollers 28 have substantially the same length in the width direction W as the opposing conveying rollers 27 .

On the other hand, the nipping rollers 281 to 288 installed on the upstream side of the pressing portion 8 of the second mechanism 102 are installed in a range shorter than the length in the width direction W of the transport path 20 . FIG. 2 shows the case where the nipping rollers 281 to 288 on the upstream side of the pressing portion 8 of the second mechanism 102 are installed at positions on the left side of the conveying path 20 in FIG. .

FIG. 10 is a perspective view of the most upstream nipping roller 281 of the second mechanism 102 and the support unit 18 for the nipping roller 281 . 11 is a plan view of the nipping roller 281 and the support unit 18. FIG. FIG. 12 is a front view of the nipping roller 281 and the support unit 18 . FIG. 13 is a longitudinal sectional view of the nipping roller 281 and the support unit 18. As shown in FIG.

The nipping roller 281 positioned most upstream of the second mechanism 102 is divided into a plurality of pieces in the width direction W. As shown in FIG. The support unit 18 includes a pivot portion 37 and a retraction portion 39 . The shaft support portion 37 rotatably supports all of the plurality of divided nipping rollers 281 . The shaft support portion 37 is formed in a horizontally elongated rectangular parallelepiped shape with an open bottom, and accommodates the nipping roller 281 therein. These nipping rollers 281 are configured to be retractable from the conveying path 20 by the retracting section 39 while being supported by the shaft support section 37 .

The retracting portion 39 retracts the nipping roller 28 from the conveying path 20 when the sheet S is folded by the folding portion 7 . The retraction unit 39 clamps from a clamping position along the width direction W perpendicular to the transport direction F of the transport unit 2 to the retraction position where the rotation shaft 34 of the clamping roller 281 intersects the width direction W. Roller 28 is moved. In the present embodiment, as shown in FIG. 14, the rotating shaft 34 extends vertically at the retracted position.

The evacuation section 39 includes the moving section 30 . The moving portion 30 moves the shaft support portion 37 that rotatably supports the nipping roller 281 toward the outside of the conveying path 20 . The moving section 30 includes a swing section 40 . The oscillating portion 40 oscillates the pivot portion 37 around the oscillating shaft 38 . The swing shaft 38 extends along the transport direction F. As shown in FIG. The rocking portion 40 includes a retraction driving portion 33 , a support base 43 , a rotating body 35 , a link 36 and a detection portion 44 . The detection unit 44 includes a light shielding plate 441 and an optical sensor 442 .

The retraction driving portion 33 , the rotating body 35 and the swing shaft 38 are supported by a support base 43 fixed to the apparatus main body 10 . The rotating body 35 is rotated by the drive of the retracting drive section 33 . One end of the link 36 is connected to the disk surface of the rotor 35 by a pin 64 . The other end of the link 36 is connected by a pin 65 between the pivot shaft 38 of the shaft support 37 and the nipping roller 281a located on the leftmost side in FIG.

A light blocking plate 441 is fixed to the rotating shaft 35 a of the rotating body 35 . The light blocking plate 441 is detected by a sensor 442 installed below the rotating body 35 to detect whether the nipping roller 281 is positioned at the retracted position or the nipping position.

When the sheet S is conveyed, the nipping roller 281 is positioned at the nipping position. When folding the sheet S, the nipping roller 281 moves to the retracted position. When moving to the retracted position, the retraction driving portion 33 is driven, and the rotor 35 is rotated counterclockwise in FIG. 13 by a predetermined amount. The rotation of the rotating body 35 causes the link 36 to move leftward in FIG. As a result, the shaft support portion 37 swings around the swing shaft 38 .

As shown in FIG. 14, the shaft support portion 37 moves from the horizontal posture to the vertical posture while supporting the nipping roller 281 . The installation direction of the nipping roller 281 is changed by approximately 90 degrees. The conveying path 20 is opened by the movement of the nipping roller 281 from the nipping position to the retracted position.

The other nipping rollers 282 to 288 on the upstream side of the pressing portion 8 of the second mechanism 102 are also substantially similar to the nipping roller 281 and its supporting unit 18 installed on the most upstream side of the second mechanism 102 shown in FIGS. have a configuration. The nipping rollers 286 to 288 respectively opposed to the three conveying rollers 275 to 278 installed adjacently on the upstream side of the pressing portion 8 are moved integrally from the nipping position to the retracted position by one retracting portion 39 .

The control unit 9 has a CPU connected to an operation panel (not shown). The operation panel functions as a setting section for setting processing information of the sheet S. FIG. The setting section allows the user to set the type and thickness of the sheet S, the paper quality, hardness, the state of surface processing, the size, the shape of the punching die, the type, the crease position, the glue application position, and the like. Manually or automatically entered and configured to be configurable. In addition, the setting unit can also call up and set the form of the sheet S together with the processing content of the sheet S from the storage unit when the user inputs or selects a number or the like. The operation panel also functions as a display unit that displays various types of information.

Next, the operation of the folding device 1 will be described. FIG. 15 is a plan view of the sheet S to be processed by the folding device 1 according to the first embodiment. The sheet S is previously cut into a predetermined shape by a cutting die. The sheet S includes a holding piece that is held in the conveying path 20 by the holding portion 71 of the folding portion 7 when folded, and a folded piece that is folded to a position facing the holding piece.

The holding piece for the sheet S shown in FIG. The folded piece is composed of a front glue margin D, a rear glue margin E, a front folded piece H, and a rear folded piece I. Then, when the sheet S is folded in half at the center fold line C5, the upstream portion Br of the main body B constitutes a holding piece, and the downstream portion Bf of the main body B constitutes a folded piece.

The sheet S is provided with a longitudinal fold Cf along the transport direction F of the transport unit 2 or a lateral fold Cw along the width direction W orthogonal to the transport direction F. The sheet S shown in FIG. 15 has one longitudinal fold Cf at the same position in the width direction W. As shown in FIG. The downstream portion of the longitudinal fold Cf is the front longitudinal fold C3, and the upstream portion thereof is the rear longitudinal fold C4. Two lateral folds Cw are set. The lateral fold Cw includes a front lateral fold C1 and a rear lateral fold C2.

A glue G is applied to the front glue margin D and the rear glue margin E. The front glue margin D, the rear glue margin E, the front fold H, and the rear fold I are attached to the main body B at the front horizontal fold C1, the rear horizontal fold C2, the front vertical fold C3, and the rear vertical fold C4, respectively. folded towards. Further, the main body B of the sheet S is folded in half along the central crease C5 to form the processed object J shown in FIG.

When the sheet S is processed by the folding device 1 , the sheet S is placed on the supply tray 94 . FIG. 16 shows each step when the sheet S is sequentially folded. The uppermost sheet S on the supply tray 94 is supplied to the skew correction section 4 on the downstream side by the suction conveying section 95 .

In the skew correction unit 4, the skew belt 42 runs, and the sheet S is conveyed with the side edge Q shown on the left side in FIG. When the sheet S reaches the vertical crease portion 5, a front vertical fold C3 and a rear vertical fold C4 are formed along the conveying direction F, as indicated by the two-dot chain line in FIG. 16(b).

After that, the sheet S is conveyed to the lateral crease portion 6 . At the timing when the front lateral fold C<b>1 of the sheet S is positioned between the concave member 61 and the convex member 62 , the controller 9 stops the conveying of the sheet S by the conveying unit 2 . Then, the control section 9 drives the lifting section 63 to engage the convex member 62 via the concave member 61 and the sheet S to form the front lateral fold C1. The rear horizontal fold C2 is also formed in the same manner as the front horizontal fold C1. As a result, the front horizontal fold C1 and the rear horizontal fold C2 shown in FIG. 16(c) are formed.

After that, the leading portion of the sheet S passes through the first folding section 11 and reaches the second folding section 12 . When the front lateral folding line C1 reaches above the straight line connecting the pair of left and right second rotating shafts 59 of the second folding section 12, the control section 9 stops conveying the sheet S. As shown in FIG.

FIG. 17 is a plan view showing a schematic configuration of part of the folding device 1 in a state where the control section 9 stops the conveyance of the conveying section 2 in order to fold the sheet S at the front lateral fold C1. 18 is a perspective view showing a main part in the state of FIG. 17. FIG. 17 and 18, the sheet S is nipped between the conveying roller 27 and the nipping roller . The front lateral fold C1 is located above the straight line connecting the second rotating shafts 59 of the second folding section 12 . A nipping roller 282 installed adjacently on the upstream side of the second folding section 12 and a nipping roller 283 installed adjacently on the downstream side of the second folding section 12 are a part of the main body B of the sheet S and a part of the front paste margin D, respectively. are sandwiched between them. As shown by the arrow in the figure, even if the front glue margin D is folded toward the main body B on the upstream side at the front lateral fold C1 and the front glue margin D is folded back to the position indicated by the dashed line, the nipping roller 282 , 283 exist on the folding path of the front glue margin D, and the front glue margin D cannot be folded toward the main body B in this state.

Therefore, the control section 9 causes the nipping rollers 282 and 283 installed adjacently upstream and downstream of the second folding section 12 to be retracted from the conveying path 20 by the retracting section 39 . The control unit 9 drives the retraction drive units 33 of the second and third retraction units 22 and 23, respectively. As a result, the rotating body 35 of the retracting portion 39 is rotated by a predetermined amount. The link 36 acts on the shaft support portion 37 to swing the shaft support portion 37 around the swing shaft 38 .

The nipping rollers 282 and 283, in which the shaft support portion 37 extends in the width direction W and the rotating shaft 34 extends in the horizontal direction at the nipping position, are oriented so that the rotating shaft 34 extends in the vertical direction as shown in FIG. be raised.

The nipping rollers 282 and 283 move from the state of nipping the front margin D and main body B at the nipping position to the retracted position on the side of the conveying path 20 . As a result, as shown in FIG. 19, the sheet S is released from the nipped state between the nipping rollers 282 and 293 on the conveying path 20 . The upper surface of the sheet S is exposed around the second folding section 12 .

On the other hand, the lower surface of the sheet S is supported by the conveying roller 27 and the second holding portion 57 on the lower side of the conveying path 20 . When the nipping rollers 282 and 283 are moved to the retracted position, the control section 9 controls the switching section 715 of the second folding section 12 so that negative pressure is generated within a predetermined range according to the size of the sheet S. . The controller 9 then drives the negative pressure generator. By driving the negative pressure generating device, a negative pressure is generated in the connecting member 714 at a position corresponding to the area where the sheet S exists on the conveying path 20 , and the sheet S is sucked from the air vent 713 . The sheet S is held on the holding base 711 .

Next, the control section 9 drives the folding drive section 732 . By driving the folding drive section 732 , the rotation shaft 74 is rotated by a predetermined amount via the power transmission section 736 . The folding unit 750 is rotated around the rotating shaft 74 . As shown in FIG. 20, the second folding member 55 and the second folding roller 60 move to the folding position and face the second holding section 57 and the second conveying roller 272, respectively.

The front glue margin D is rotated around the front lateral fold line C1 on the conveying path 20, folded back toward the upstream side in an arc, and moved to a position facing the main body B. - 特許庁In this manner, the front margin D is superimposed on the main body B, and the sheet S is folded at the front lateral fold C1 as shown in FIG. 16(d). A perspective view of this state is shown in FIG.

Since the nipping rollers 282 and 283 on both sides of the second folding section 12 are both moved to the retracted positions, the front paste margin D is nipped in the movement path of the front paste margin D when it is folded on the conveying path 20. The existence of the rollers 282 and 283 does not hinder the folding operation.

The control section 9 controls the folding driving section 7323 to further rotate the folding unit 750 from the folding position. By the action of the link mechanism 733 shown in FIG. 8, the pressing force of the folding member 721 pressing the sheet S against the holding base 711 is released at the folding position. The folding member 721 moves a predetermined distance away from the holding table 711, and a gap K is generated between the holding table 711 and the folding member 721, as shown in FIG. On the other hand, the folding back roller 90 is strongly pressed against the conveying roller 27 by the biasing force of the biasing member 278 . In this manner, the sheet S is conveyed downstream while the pressing force of the folding member 721 against the holding table 711 is released.

The front horizontal fold C1 passes through the first glue application section 31 and the third folding section 13 . When the front glue margin D reaches the second glue application section 32 , the control section 9 stops the conveying section 2 . The control unit 9 sprays the glue G from the second nozzle 91 of the second glue application unit 32, and applies the glue G to the upper surface of the folded front glue margin D as shown in FIG. 16(e).

Further, the control unit 9 does not convey the sheet S to the downstream side while maintaining the position where the glue is applied to the front glue margin D, and folds the front folded piece at the front longitudinal fold C3 as shown in FIG. 16(f). Fold H toward main body B. At this time, the control section 9 first drives the fourth retracting section 24 to move the upper nipping roller 284 of the conveying path 20 installed in the third folding section 13 from the nipping position to the retracted position. As a result, when the front folded piece H is folded toward the main body B, the nipping roller 284 is positioned above the main body B, thereby preventing the folding operation from being hindered.

The control section 9 drives the third rotating section 68 . The third folded portion 66 is swung around the third rotating shaft 69 and reaches a position facing the third holding portion 67 .

The sheet S is folded at the front longitudinal crease C3. The front folded piece H is superimposed on the main body B. As shown in FIG. At this time, the front paste margin D is already folded over the main body B and faces the leading portion of the sheet S, and the front paste margin D is applied to the upper surface of the front paste margin D. The upper surface of D and the lower surface of the front end portion of the front folded piece H are adhered.

After that, the control section 9 drives the fourth retraction section 24 . The nipping roller 284 is moved from the retracted position to the nipping position. The nipping roller 284 nips the main body B and the front folded piece H between itself and the conveying roller 274 on the lower side of the conveying path 20 . When the control unit 9 drives the transport driving unit, the sheet S is transported downstream by the nipping roller 284 and the transport roller 274 facing the nipping roller 284 .

After that, when the rear lateral fold C2 of the rear portion of the sheet S reaches the installation position of the first rotating shaft 49 of the first folding section 11, the control section 9 stops the transport driving section. The nipping roller 281 adjacent to the upstream side of the first folding section 11 and the nipping roller 282 adjacent to the downstream side are moved from the nipping position to the retracted position by driving the first retraction section 21 and the second retraction section 22, respectively. Moving. As a result, the sheet S nipped by the nipping rollers 281 and 282 is released.

Then, while the sheet S is held by the first holding portion 47, the control portion 9 causes the first rotating portion 48 to fold the sheet S along the rear lateral fold line C2. The rear paste margin E is positioned above the main body B. As a result, the sheet S is brought into the state shown in FIG. 16(g).

By further driving the folding drive section 732 from the folding position and rotating the rotating unit 750 counterclockwise in FIG. At the folding position after rotating more than 180 degrees, the pressing force of the folding member 721 pressing the sheet S against the holding table 711 is released. The sheet S is conveyed downstream while the pressing force of the folding member 721 against the holding table 711 is released.

When the post-adhesive margin E reaches the first adhesive application section 31 , the control section 9 stops the conveying section 2 . When the controller 9 sprays the glue G from the first nozzle 81, the glue G is applied to the upper surface of the rear glue margin E as shown in FIG. 16(h).

Furthermore, the control unit 9 folds the rear folded piece I toward the main body B at the rear vertical fold C4 without conveying the sheet S downstream while keeping the position where the glue is applied to the rear glue margin E. At this time, the control section 9 drives the retraction drive section 33 to retract the nipping roller 284 installed in the third folding section 13 . The nipping roller 284 is moved from the nipping position to the retracted position.

The control section 9 drives the third rotating section 68 to swing the third folded section 66 around the third rotating shaft 69 to position it at a position facing the third holding section 67 . As a result, the sheet S is folded at the rear longitudinal fold line C4. The rear paste margin E and the rear end portion of the rear folded piece I are adhered by the glue G on the upper surface of the rear pasted margin E positioned between the main body B and the rear folded piece I. As a result, the sheet S is brought into the state shown in FIG. 16(i).

The controller 9 returns the pinching roller 284 to the pinching position by the fourth retracting portion 24 . Then, the control section 9 drives the conveying section 2 . When the center fold C5 reaches the fourth folding section 14, the conveying section 2 is stopped. The control unit 9 moves the three nipping rollers 286 to 288 adjacent to the downstream side of the fourth folding unit 14 integrally from the nipping position to the retracted position by the sixth retracting unit 26 .

The control unit 9 swings the fourth folded portion 76 to bring the downstream portion Bf of the main body B close to the upstream portion Br of the main body B as a holding piece held by the fourth holding portion 77, thereby moving the sheet. Fold S at center crease C5.

The controller 9 further rotates the folding unit 750 from the folding position to the transport position, and releases the pressing force of the sheet S against the holding table 711 . The sheet S is nipped between the turn-back roller 90 and the conveying roller 27 and conveyed downstream. The folded sheet S is conveyed by the conveying section 2 with the central crease C5 leading.

When the leading portion of the sheet S reaches the pressing portion 8 , the control portion 9 stops the conveying portion 2 . The control unit 9 drives the lifting unit 87 to lower the pressing member 85 on the upper side of the conveying path 20 toward the pressing member 86 on the lower side. The central fold C5 is pressed by a pair of pressing members 85, 86 and folded firmly.

The control unit 2 resumes driving the conveying unit 2 and stops conveying when the trailing edge of the sheet S reaches the pressing unit 8 . The control unit 2 presses the front lateral fold C1 and the rear lateral fold C2 that are vertically overlapped by a pair of pressing members 85 and 86 . The front horizontal fold C1 and the rear horizontal fold C2 are folded more tightly, and the applied glue G firmly adheres the front glue margin D and the front folded piece H, and the rear glue margin E and the rear folded piece I. be. The processed product J obtained by processing is discharged onto the discharge tray 99 .

As described above, the folding device 1 according to the first embodiment includes the transport section 2 provided with the transport rollers 27 for transporting the sheet S, and the folding section 7 for folding the sheet S transported by the transport rollers 27. The conveying unit 2 includes a nipping roller 28 that nips and conveys the sheet S between itself and a conveying roller 27 , and the nipping roller 28 is retracted from the conveying path 20 when the sheet S is folded by the folding unit 7 . The folding section 7 includes a holding section 71 that holds the holding piece of the sheet S on the conveying path 20 and folds the sheet S to a position facing the holding piece held by the holding section 71 . A folding portion 72 for folding back the sheet S is provided, and the folding portion 72 is provided with folding rollers 90 capable of nipping and transporting the folded sheet S between itself and the conveying roller 27, so that the sheet S can be folded. After that, the sheet S can be nipped and conveyed between the conveying roller 27 and the folding roller 90 . In this case, the folding portion 72 is returned to the original support position, the nipping roller 28 is moved from the retracted position to the nipping position, and the sheet S is nipped and conveyed between the conveying roller 27 and the nipping roller 28. As a result, the sheet S can be conveyed downstream in a short time.

In addition, in the present embodiment, the turn-back roller 90 is longer than the nipping roller 28 in the width direction W, so that the roller 19 nipping and transporting the folded sheet S between itself and the transport roller 27 is When the folding roller 90 is used, the fold C can be pinched and pressed in a wider range than when the pinch roller 28 is used, and the fold C can be pinched and conveyed in the entire width direction W range. Therefore, the sheet S can be folded at the crease C more firmly.

(Second Embodiment) A second embodiment of the present invention will be described below. In each of the following embodiments, the configuration of each part of the folding device 1 is the same as that of the first embodiment, except that the control method of the control section 9 is different.

In the first embodiment, after folding the folded pieces onto the holding pieces in the first, second, and fourth folding sections 11, 12, and 14, the sheet S is nipped between the conveying rollers 27, and the sheet S is conveyed to the downstream side. The roller 19 that conveys the sheet was the folding roller 90 . However, if the thickness of the sheet S exceeds a predetermined value, it may be difficult to convey the sheet S between the conveying roller 27 and the turn-back roller 72 in this way.

For example, when the folding unit 750 is moved from the folding position to the transporting position, a gap K is formed between the holding table 711 and the folding member 721 . However, when the thickness of the sheet S is equal to or greater than a predetermined value, there is a possibility that a sufficient gap K cannot be secured.

In this way, when the thickness, paper quality, surface processing state, size, punching die shape, type, printing state, and other forms of the sheets S to be folded differ, the control unit 9 can , which of the nipping roller 28 or the folding roller 72 is used to convey the folded sheet S is controlled.

The form of the sheet S to be folded is input and set by an operator through an operation panel or a communication terminal, or is detected by a detection unit (not shown) for detecting the form of the sheet S and is transmitted to the control unit 9. . For example, at least one of a thickness sensor, a paper width detection sensor, and the like can be used as the detection unit.

For example, when the detection section is a thickness sensor, the control section 9 determines whether the thickness of the sheet S is thicker than a predetermined value based on the detection result of the detection section. When the sheet S is thicker than a predetermined value, the control unit 9 reverses the folding unit 72 in the folding unit 7 to fold the sheet S, and then moves the folding unit 72 from the folding position to the conveying position. Instead, the folding driving portion 732 is reversely rotated to return the folding portion 72 to the original supporting position. Then, the control section 9 drives the retraction driving section 33 to move the nipping roller 28 from the retracted position to the nipping position. After that, the control unit 9 drives the conveying unit 2 so that the sheet S can be nipped between the conveying roller 27 and the nipping roller 28 and conveyed downstream.

As described above, in the second embodiment, the control unit controls whether the nipping roller 28 or the folding roller 72 is used to convey the folded sheet S based on the form of the sheet S to be folded. 9, even if it is difficult to convey the sheet S by the conveying roller 27 and the turn-back roller 72, the sheet S can be conveyed downstream by the conveying roller 27 and the nipping roller 28. .

(Third Embodiment) In the third embodiment, the shape of the sheet Sa to be processed is different from that in the first embodiment, and the control method of the control section 9 is changed to the first embodiment. , 2. FIG. 22 shows the sheet Sa according to the third embodiment, and shows each process when the sheet Sa is sequentially folded. As in the first embodiment, the sheet Sa is previously punched into a predetermined shape by a cutting die, but the shape is set differently from that in the first embodiment. The sheet Sa shown in FIG. 22 is provided with four longitudinal folds C5-C8 at different positions in the width direction W and first to fourth lateral folds C9-C12 along the width direction W. As shown in FIG.

The sheet Sa is divided into four sections parallel to the width direction W by lateral folds C9-C12. The sheet Sa has a front folded piece R, a front main body T, a rear main body U, a rear folded piece V, and an adhesive margin Y. When the sheet Sa is folded at the third fold line C11 that is the third from the downstream side in the conveying direction F, the rear folded piece V is superimposed on the rear main body U, and the rear folded piece V is placed on the downstream end of the front main body T. are superimposed on each other, resulting in the state shown in FIG. Then, as shown in FIG. 4(c), the glue G is applied to the upper surface of the glue margin Y. Then, as shown in FIG. When the sheet Sa is folded at the most downstream first fold line C9, the front folded piece R is superimposed on the front main body T, and the front folded piece R is superimposed on the rear margin Y and glued. As shown in FIG. (d), the sheet Sa is formed in a tubular shape.

The vertical creases C5-C8 are processed by the vertical crease portion 5. As shown in FIG. In order to simultaneously form a plurality of vertical folds Cf, the vertical crease portion 5 may be provided with a plurality of vertical crease blades (not shown). Further, even if there is only one vertical crease blade 501, the control unit 9 forms one vertical crease Cf, then controls the conveying unit 2, and causes the sheet S to travel backward to the upstream side. By appropriately moving the vertical crease blade 501 to a predetermined position in the width direction W where the vertical crease Cf is to be formed, the vertical creases Cf arranged side by side in the width direction W can be formed.

The lateral folds C9-C12 are processed by the lateral crease portion 6. FIG.

FIG. 23 shows a folding state in which the control unit 9 stops the conveying of the conveying unit 2 in order to fold the sheet Sa at a third fold C11 that is the third lateral fold Cw from the downstream side in the conveying direction F of the sheet Sa. 1 is a plan view showing part of the device 1; FIG. In this state, all the nipping rollers 28 are at the nipping position of the sheet Sa, and the sheet Sa is nipped between the conveying rollers 27 and the nipping rollers 28 .

The third fold C11 is located above the straight line connecting the pair of left and right first rotation shafts 49 of the first folding section 11 . A nipping roller 281 installed adjacently on the upstream side of the first folding section 11 and a nipping roller 282 installed adjacently on the downstream side hold the rear folded piece V and the rear main body U of the sheet Sa, respectively. sandwiched. As indicated by an arrow in the figure, a nipping roller 281 exists on the folding path of the rear-folded piece V in order to fold the rear-folded piece V toward the rear main body U on the downstream side at the third folding line C11. , 282 are retracted from the conveying path 20 by the retracting section 39 .

The control unit 9 drives the first and second evacuation units 21 and 22, respectively. As shown in FIG. 24 , the nipping rollers 281 and 282 are lifted from the nipping position and moved to the retracted position on the side of the conveying path 20 . The control unit 9 holds the sheet Sa on the holding table 711 by the first holding unit 47 and drives the first rotating unit 48 . As shown in FIG. 25, the folding unit 750 reverses toward the downstream side, and the sheet Sa is folded at the third folding line C11.

Since both of the nipping rollers 281 and 282 have moved to the retracted positions, the rear folded piece V can be properly superimposed on the rear main body U and folded. After that, the control section 9 further rotates the folding unit 750 from the folding position to the conveying position, drives the conveying driving section, and moves the sheet Sa downstream using the conveying roller 272 and the first folding roller 50. transport.

At this time, if necessary, the control unit 9 can control which of the nipping rollers 28 and the folding rollers 90 is used to convey the sheet Sa, based on the form of the sheet Sa. Then, the controller 9 may use the nipping roller 28 instead of the folding roller 90 to convey the sheet Sa to the downstream side. In this case, the controller 9 returns the folding unit 750 from the folding position to the supporting position. Further, the controller 9 moves the nipping roller 28 from the retracted position to the nipping position. Then, the sheet Sa is controlled to be conveyed downstream by the conveying roller 27 and the nipping roller 28 .

When the glue margin Y reaches the second glue coating section 32 , the control section 9 stops the conveying section 2 . The control unit 9 sprays the glue G from the second nozzle 91 of the second glue application unit 32, and applies the glue G to the upper surface of the folded-back margin Y as shown in FIG. 22(c).

Thereafter, when the first fold C9 of the sheet Sa reaches the fourth folding section 14, the control section 9 stops the conveying section 2. FIG. The control section 9 moves the three nipping rollers 286 to 288 adjacent to the downstream side of the fourth folding section 14 together from the nipping position to the retracted position. The control section 9 rotates the front folding piece R toward the front main body T by the fourth folding section 76, and folds the sheet Sa at the first folding line C9 as shown in FIG. 22(d).

At this time, the lower surface of the front folded piece R is superimposed on the margin Y and adhered. After that, the control unit 9 uses the conveying roller 27 and either the folding roller 90 or the nipping roller 283 to convey the sheet Sa downstream. When the first fold C9 and the third fold C11 of the sheet Sa reach the pressing portion 8, the control portion 9 stops the conveying portion 2 and is pressed by the pressing members 85 and 86 to be firmly folded.

(Fourth Embodiment) FIG. 26 shows a sheet Sb according to a fourth embodiment, and shows steps when the sheet Sb is sequentially folded. As in the first and third embodiments, the sheet Sb is previously punched into a predetermined shape by a cutting die. The sheet Sb shown in FIG. 26 has the same number of folds C as the sheet Sa according to the third embodiment, and has a similar shape. That is, four longitudinal folds Cfb along the transport direction F of the transport section 2 and first to fourth folds C13 to C15 along the width direction W orthogonal to the transport direction F are provided. The sheet Sb is divided into four parts, a front folded piece L, a middle folded piece M, a front main body N, a rear main body O, and an adhesive margin P, by the 1st-4th folds C13-C16.

On the other hand, the size of the sheet Sb according to the fourth embodiment is set smaller than that of the sheet Sa according to the third embodiment. Therefore, similarly to the third embodiment, if the rear main body O is folded on the front main body N by folding at the third folding line C15, the length of the entire sheet S in the conveying direction F becomes too small. Then, the length of the sheet Sb becomes shorter than the length between the conveying rollers 27 and the folding sections 11 to 14 which are arranged side by side, and there is a possibility that the sheet Sb may fall from the conveying path 20 .

Therefore, the sheet Sb according to the fourth embodiment is folded at the fourth folding line C16, and the paste margin P is overlaid on the back main body O, as shown in FIG. 26(b). Then, the glue G is applied to the glue margin P. After that, the sheet Sb is folded at the second fold line C14 that is the second from the most downstream side. As a result, the folded piece M is overlaid on the front main body N and the rear main body O, and the front folded piece L is overlaid on the rear main body O, as shown in FIG. 26(c). The lower surface of the front folded piece L is adhered to the paste applied to the upper surface of the paste margin P, and the sheet Sb is formed in a tubular shape.

27, in order to fold the sheet Sb at the fourth folding line C16 on the most downstream side in the conveying direction F of the sheet Sb, the fourth folding line C16 rotates the pair of left and right first rotating shafts 49 of the first folding section 11. When positioned above the connecting straight line, it indicates a state in which the control unit 9 has stopped the transport of the transport unit 2 .

In order to fold back the paste margin P toward the downstream side at the fourth folding line C16 of the sheet Sb, the nipping roller 283 existing on the folding path of the paste margin P is retracted from the conveying path 20 by the second retracting portion 22. do it.

The control section 9 drives the second retraction section 22 to lift the nipping roller 282 to the nipping position and move it to the retracted position. Then, the control section 9 reverses the folding unit 750, and the sheet Sb is folded at the third folding line C14.

After that, the control section 9 further rotates the folding unit 750 from the folding position to the conveying position, drives the conveying driving section, and moves the sheet S downstream using the conveying roller 272 and the first folding roller 50. transport. Alternatively, the control section 9 returns the folding unit 750 from the folding position to the supporting position, and moves the nipping roller 282 from the retracted position to the nipping position. Then, the sheet Sb may be conveyed downstream by the conveying roller 27 and the nipping roller 28 .

When the glue margin P reaches the second glue coating section 32 , the control section 9 stops the conveying section 2 . The controller 9 sprays the glue G from the second nozzle 91 of the second glue applicator 32 and applies the glue G to the upper surface of the glue margin P folded back by the first folding part 14 .

After that, when the second fold C14 of the sheet S reaches the fourth folding section 14, the control section 9 stops the conveying section 2. FIG. Since the sheet Sb does not reach the three nipping rollers 286 to 288 adjacent to the downstream side of the fourth folding section 14, the control section 9 leaves the nipping rollers 286 to 288 as they are without moving. Then, the control unit 9 rotates the front folding piece L and the middle folding piece M toward the front main body N and the rear main body O by the fourth folding part 76, and folds the sheet Sb into the second folding position as shown in FIG. 26(c). Fold at the second fold C14.

At this time, the lower surface of the front folded piece L is overlaid on the adhesive margin P and adhered. After that, the control unit 9 conveys the sheet Sb to the downstream side by the conveying roller 27 and the folding roller 90 . When the sheet Sb reaches the installation position of the nipping rollers 286 to 288 on the downstream side, the sheet Sb is conveyed by the nipping rollers 286 to 288 at the nipping position and the conveying roller 27 and sent to the pressing portion 8 .

In addition, the present invention is not limited to each embodiment described above. In the above-described embodiment, the folding portion 72 includes a rotating portion that rotates the folding piece toward the holding piece with the folding line C formed in the sheet S as the center of rotation. The folded piece may be brought close to the holding piece with the point (1) as the center of rotation.

In addition, the folding unit 7 folds the sheet at the vertical crease along the conveying direction of the conveying unit 2 provided in the sheet S or the lateral crease along the width direction perpendicular to the conveying direction. It may be oblique to the direction. In addition, although the retracting portion 39 includes the moving portion 30 that moves the shaft support portion 37 that rotatably supports the roller 19 toward the outside of the transport path 20, the roller itself may be moved, and the transport path The rollers may be retracted to a position above or below 20 that does not interfere with the folding operation.

Further, the moving part 30 includes the swinging part 40 which swings the shaft support part 37 about the swing shaft 38, but the shaft support part 37 may be moved vertically or may be moved up and down. , may be moved in parallel or diagonally. Further, the swing shaft 38 extends along the transport direction F, but by moving the shaft support portion 37 forward or backward in three dimensions with respect to the transport direction, the swing shaft 38 is oblique to the transport direction F. may be formed in In addition, the retracting portion 39 moves from a nipping position where the rotation shaft 34 of the roller 19 is along the width direction W orthogonal to the transport direction F of the transport portion 2 to a retraction position where the rotation shaft 34 intersects the width direction W. Although the roller 19 is moved, the roller may be moved to a retracted position parallel to the transport direction.

Further, although the rotation shaft 34 extends in the vertical direction at the retracted position, the rotation shaft of the roller may retract to the outside of the conveying path along the conveying direction at the retracted position. Moreover, although the nipping rollers 281 to 288 that can be retracted by the retracting portion 39 are divided into three in the width direction W, they may be divided into two or four or more. good. In addition, although the width direction W length of the nipping rollers 281 to 288 is about half the width direction W length of the transport path 20, it may be shorter or longer than half. It may be longer than the length of the transport path.

In addition, although the retraction portion 39 is provided only on one side of the transport path 20, if the rollers are divided in the width direction and individually pivotally supported, the retraction portions are provided on both the left and right sides of the transport path to transport the rollers. You may also evacuate to the left and right sides of the road.

Further, the folding device 1 includes the first and second glue applying units 81 and 82, but the glue applying units may be omitted, and three or more glue applying units may be provided. At the first and second glue applying portions 81 and 82, the front glue margin D and the rear glue margin E are applied with glue, respectively, and the front fold is folded at the front vertical fold C3 and the rear vertical fold C4 without being conveyed. The piece H and the rear-folded piece I were each folded, but if the glue-applied portion and the folded portion are placed at separate locations, the folded portion of the sheet after the glue application is folded until it reaches the predetermined folded portion. The sheet may be conveyed, and when the fold reaches the appropriate folding portion, the sheet may be stopped from being conveyed and folded.

Further, the folding device 1 includes the vertical crease portion 5 and the horizontal crease portion 6 for forming folds, but when folding a sheet on which creases have been formed, the mechanism for forming creases may not be provided. . In addition, the folding device 1 includes the first to fourth folding sections 11 to 14, but it is sufficient to include at least one folding section, and may include two or three folding sections. You may provide the above folding parts.

Further, the shape of the sheets to be folded by the folding device 1 is not limited to those shown in the above-described embodiments, and any sheet that can be folded along the crease can be used to form a business card storage box. It may be a sheet for forming bottles, containers, containers for housing liquors, etc., or a sheet for forming various types of folding paper such as Christmas cards, membership cards, and coupons.

In addition, various processing information is manually set by the user from the operation panel, but it may be automatically input by reading a bar code, two-dimensional code, etc. with a reading unit, and an external information folding device such as a personal computer It may be set by communication. Alternatively, a plurality of sheet folding patterns may be stored in advance in the storage means by manual input from the operation panel, and each pattern may be called by number or the like and set.

In addition, the nipping rollers 281 to 288 adjacent to the upstream side and the downstream side of the folding section 7 for folding are retracted by the retraction section 39, but all the nipping rollers 281 to 288 can be moved to the retracted positions at once. good.

S sheet 2 conveying section 7 folding section 20 conveying path 27 conveying roller 28 nipping roller 39 retracting section 71 holding section 72 folding section 90 folding roller.

Claims (2)

a conveying unit provided with conveying rollers for conveying the sheet;
a folding unit that folds the sheet conveyed by the conveying roller,
The conveying unit includes a nipping roller that nips and conveys a sheet between itself and the conveying roller;
a retraction section for retracting the nipping roller from the conveying path when the sheet is folded by the folding section;
The folding section is provided with a holding section that holds the holding piece of the sheet on the conveying path, and a folding section that folds the folded piece of the sheet to a position facing the holding piece held by the holding section,
The folding unit is provided with folding rollers capable of pinching and transporting the folded sheet between itself and the conveying roller. 2. The folding device according to claim 1, further comprising a control unit that controls whether the nipping roller or the folding roller is used to convey the folded sheet based on the form of the sheet to be folded.

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