WO2023243105A1

WO2023243105A1 - Sheet conveyance method, conveyance device, and bag manufacturing machine

Info

Publication number: WO2023243105A1
Application number: PCT/JP2022/024427
Authority: WO
Inventors: 力宮本; 政信大橋
Original assignee: デュプロ精工株式会社
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2023-12-21

Abstract

[Problem] The purpose of the present invention is to provide a sheet conveyance method and conveyance device that are capable of properly conveying a folded sheet. [Solution] The conveyance device according to the present invention comprises: a conveyance part that conveys a folded sheet 100; a discharge part that is installed upstream of the conveyance part and discharges the sheet to the conveyance part; and an angle adjustment part 79 that adjusts the angle of a conveyance surface of the conveyance part, the conveyance surface conveying the sheet 100. Moreover, in the abovementioned configuration, the angle adjustment part 79 is provided with a fold adjustment part 96 that adjusts the angle of the conveyance surface according to the folded state of the sheet when the sheet, which is folded at a crease set in a direction intersecting the conveyance direction of the conveyance part, is to be discharged to the conveyance part by the discharge part. Furthermore, the fold adjustment part 96 is provided with an inclination part 97 that makes the conveyance surface inclined by a prescribed angle when the folded sheet 100 is discharged along the conveyance direction of the conveyance part by the discharge part, with the crease at the leading end.

Description

Sheet conveyance method, conveyance device and bag making machine

The present invention relates to a sheet conveying method, a conveying device, and a bag making machine.

Conventionally, a sealing device is known that folds a flap while moving an envelope along a predetermined conveyance path. Patent Document 1 below discloses a sealing device in which an envelope with an adhesive film attached thereto is conveyed to a flap pressing mechanism, and the flap of the envelope is folded by a rotating folding plate. The flap is pressed against the envelope body and sealed.

Japanese Patent Application Publication No. 9-240628

In the sealing device described in Patent Document 1, only the flap needs to be folded and sealed. On the other hand, in bag-making machines that manufacture envelopes by folding sheets cut into a predetermined shape and applying glue, the edges of the folded sheet interfere with other envelopes during sheet transport, resulting in jams. may occur.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet conveyance method and a conveyance device that can appropriately convey a folded sheet.

In order to achieve the above object, a conveyance device according to the present invention includes: a conveyance section that conveys a folded sheet; a discharge section that is installed upstream of the conveyance section and discharges the sheet to the conveyance section; and an angle adjustment section that adjusts the angle of the conveyance surface of the sheet of the conveyance section.

Further, in the above configuration, the angle adjustment section may be arranged such that when the sheet folded along a fold set in a direction intersecting the conveyance direction of the conveyance section is discharged to the conveyance section by the discharge section, A folding adjustment section is provided that adjusts the angle of the conveyance surface according to the state of folding of the sheet.

In the above configuration, the folding adjustment section adjusts the conveyance surface to a predetermined position when the folded sheet is discharged by the discharge section along the conveyance direction of the conveyance section with the fold as the leading edge. Equipped with a tilting part for tilting.

Furthermore, in the above configuration, the folding adjustment section is configured to cause the sheet, which is folded and has a first fold, to be moved by the discharge section to a certain place along the conveyance direction of the conveyance section, with the first fold as the leading edge. A flattening portion is provided to flatten the conveying surface along the horizontal direction when the sheet is reversely run toward the upstream side to form a second fold after being discharged in a fixed amount.

Furthermore, in each of the above configurations, a stacking section for stacking a plurality of sheets vertically is provided downstream of the transport section.

The bag making machine of the present invention includes the conveying device described in each of the above configurations, a folding section provided upstream of the conveying section for folding the sheet, and a folding section for folding the sheet, and applying glue to a predetermined position of the sheet along the conveying direction of the sheet. It also includes a glue applicator for applying glue.

A sheet conveyance method according to the present invention is a sheet conveyance method in which a folded sheet is conveyed by a conveyance section, and the sheet is transported from a discharge section installed upstream of the conveyance section toward the conveyance section. When discharging the sheet, the sheet is conveyed by the conveying section, the angle of the conveying surface of the sheet being adjusted according to the folded state of the sheet.

Further, in the above configuration, the fold is formed by folding at a fold set in a direction crossing the conveyance direction of the conveyance section, and the fold is formed along the conveyance direction of the conveyance section with the fold as the leading edge. When the sheet is discharged by the discharge section, the conveyance surface is tilted at a predetermined angle.

In the above configuration, after a predetermined amount of the folded sheet with the first crease formed therein is discharged by the discharge section along the conveyance direction of the conveyance section with the first fold as the leading edge, a second fold is formed. When the sheet is reversely run toward the upstream side to form a fold, the conveying surface is laid flat along the horizontal direction.

Further, in each of the above configurations, the plurality of sheets conveyed from the conveyance section are stacked vertically on a stacking section provided on the downstream side of the conveyance section.

In the bag making method of the present invention, glue is applied to a predetermined position of the sheet along the conveyance direction of the sheet in a glue application section, the sheet is folded in a folding section, and the glue-applied and folded sheet is Conveyed through each process.

According to the present invention, there is provided a conveyance section that conveys a folded sheet, a discharge section that is installed upstream of the conveyance section and discharges the sheet to the conveyance section, and a conveyance surface of the sheet of the conveyance section. Equipped with an angle adjustment section to adjust the angle, when there is a risk of interference between the preceding sheet and the following sheet due to folded sheets, resulting in a jam, the angle of the conveying surface can be adjusted to prevent interference. This can be avoided and the sheet can be conveyed appropriately.

Further, the angle adjustment unit may adjust the folding angle of the sheet when the sheet is folded at a crease set in a direction crossing the conveyance direction of the conveyance unit and is discharged to the conveyance unit by the discharge unit. If a folding adjustment unit is provided that adjusts the angle of the conveyance surface according to the state of The angle of the conveyance surface can be adjusted by the adjustment section, and the sheet can be conveyed appropriately.

The folding adjustment unit includes a tilting unit that tilts the conveyance surface at a predetermined angle when the folded sheet is discharged by the discharge unit along the conveyance direction of the conveyance unit with the fold as the leading edge. If equipped, by tilting the conveying surface using the tilting section, the preceding sheet can be conveyed downstream at a position lower than the ejection height of the ejecting section, and it is possible to avoid interfering with the subsequent sheet being ejected. It is.

The folding adjustment section is configured to: after the folded sheet with the first fold formed thereon is discharged by the discharge section by a predetermined amount along the conveyance direction of the conveyance section with the first fold as the leading edge; When the sheet is reversely run toward the upstream side to form the second fold, if the sheet is provided with a flattening section that flattens the conveying surface along the horizontal direction, the sheet can be folded at the second fold. When the sheet is run backwards, it is possible to avoid the possibility that the end of the sheet folded at the first fold interferes with the discharge section and is not conveyed properly, resulting in a jam.

Furthermore, if a stacking section for stacking a plurality of sheets vertically is provided on the downstream side of the transport section, folded sheets can be properly stacked vertically.

The bag making machine of the present invention includes a folding section provided upstream of the conveyance section for folding the sheet, a glue application section for applying glue to a predetermined position of the sheet along the conveyance direction of the sheet, and each of the above-mentioned components. Since the envelope is manufactured by folding the sheet at the folding section and applying glue at the glue application section, the folded sheet can be appropriately conveyed.

The sheet conveyance method of the present invention is a sheet conveyance method in which a folded sheet is conveyed by a conveyance section, and the sheet is conveyed from a discharge section installed upstream of the conveyance section toward the conveyance section. When discharging the sheet, the sheet is conveyed by the conveyance section in which the angle of the conveyance surface of the sheet is adjusted according to the folded state of the sheet. If there is a possibility that the sheets may interfere and cause a jam, the angle of the conveying surface can be adjusted to avoid interference and the sheet can be conveyed properly.

Further, the fold is formed by folding at a fold set in a direction intersecting the conveying direction of the conveying section, and the discharging section is carried out by the discharging section along the conveying direction of the conveying section with the fold as the leading edge. When the conveyance surface is tilted at a predetermined angle when discharging a sheet, by tilting the conveyance surface, the preceding sheet can be conveyed downstream at a position lower than the discharge height of the subsequent sheet.

Then, a predetermined amount of the folded sheet with the first fold formed thereon is discharged by the discharge section along the conveyance direction of the conveyance section with the first fold at the beginning, and then a second fold is formed. When the sheet is run backwards toward the upstream side to fold the sheet, and when the conveyance surface is laid flat along the horizontal direction, when the sheet is run backwards to fold at the second fold, the first fold It is possible to avoid jams caused by the ends of the folded sheets not being conveyed properly by the discharge section.

Furthermore, when a plurality of sheets conveyed from the conveyance section are stacked vertically on a stacking section provided on the downstream side of the conveyance section, folded sheets can be appropriately stacked.

According to the bag-making method according to the present invention, the glue application section applies glue to a predetermined position of the sheet along the sheet conveyance direction, the sheet is folded at the folding section, and the glue is removed by the conveyance method of each step. Since the coated and folded sheet is conveyed, it is possible to appropriately convey the folded sheet when manufacturing an envelope by folding the sheet at the folding section and applying glue at the glue application section.

1 is a schematic overall configuration diagram of a bag making machine according to a first embodiment of the present invention. FIG. 2 is a plan view showing the state of a sheet processed by the bag making machine of FIG. 1; FIG. 3 is a perspective view showing the sheet 100 of FIG. 2 in a folded state. It is a perspective view showing a supply tray of the bag making machine and its surroundings. FIG. 4 is a view of FIG. 4 viewed from the upstream side in the conveyance direction. FIG. 5 is a plan view of FIG. 4; 7 is a sectional view taken along the line AA in FIG. 6. FIG. FIG. 3 is a diagram showing a schematic configuration of a second folding section of the bag making machine. It is a perspective view of the conveyor of the said bag making machine, and its surroundings. 10 is a side view of FIG. 9. FIG. FIG. 9 is a plan view of FIG. 9; FIG. 10 is a view of FIG. 10 viewed from the downstream side in the conveyance direction F. It is a usage pattern diagram of the said bag making machine. It is a usage pattern diagram of the said bag making machine. It is a usage pattern diagram of the said bag making machine. It is a usage pattern diagram of the said bag making machine. It is a usage pattern diagram of the said bag making machine. It is a usage pattern diagram of the said bag making machine. It is a usage pattern diagram of the said bag making machine. It is a usage pattern diagram of the said bag making machine. It is a usage pattern diagram of the said bag making machine. It is a usage pattern diagram of the said bag making machine. It is a usage pattern diagram of the said bag making machine. It is a usage pattern diagram of the said bag making machine. It is a usage pattern diagram of the said bag making machine. It is a usage pattern diagram of the said bag making machine. It is a usage pattern diagram of the said bag making machine.

FIG. 1 is an overall configuration diagram of a bag making machine 10 according to an embodiment of the present invention. The bag making machine 10 includes, in order from the upstream side to the downstream side in the conveyance direction F in which the sheet 100 is conveyed by the conveyance roller pair 81-88, a supply section 1, a first crease processing section 2, a second crease processing section 4, A first folding section 3, a glue application section 5, a second folding section 6, a pressing section 8, and a receiving section 7 are provided in the apparatus main body 10A.

The bag making machine 10 is equipped with eight conveyance roller pairs 81-88. The conveyance roller pairs 81, 82, and 83 are connected to a first drive section 91 and rotationally driven. The pair of transport rollers 84 and 85 are connected to a second drive section 92 and driven to rotate. The conveyance roller pairs 86, 87, and 88 are connected to a third drive section 93 and rotationally driven. The conveyance roller pairs 86 , 87 , and 88 can reversely run the sheet 100 along the conveyance surface 200 by reverse rotation of the third drive section 93 .

The eight conveyance roller pairs constitute a conveyance surface 200 on which the sheet 100 is conveyed, and the conveyance surface 200 is on the same plane from the air supply unit 12 to the conveyance roller pair 88. Further, on the conveying surface 200 on which the sheet 100 is conveyed, there are

sensors

23, 24, 25, 26, 27, and 28 that detect the passage of the sheet 100 at each position (detect double feeding). It is located. Each sensor uses, for example, an optical transmission sensor.

A typical "Western-style envelope" has a horizontally long rectangular shape, and a sealing opening is formed on the long side. When manufacturing a Western-style envelope using the bag-making machine 10, for example, as shown in FIG. It is crimped onto the side piece 103.

Specifically, the bag making machine 10 transports the flat sheet 100 shown in FIG. 2(a) downstream in the transport direction F, while transporting it as shown in FIGS. 2(b) and 2(c). The Western-style envelope 90 is manufactured by processing the envelope so that

The sheet 100 is made up of a bottom piece 101, a main body 102, side pieces 103 for use as adhesive substitute protruding from both sides of the main body 102, and flaps 104. Three folds 110 are formed in the sheet 100: a vertical fold 111, and first and

second folds

112 and 113. The vertical fold 111 is along the conveyance direction F. The first and

second folds

112 and 113 are set in a direction intersecting the direction F in which the sheet 100 is conveyed by the pair of conveyance rollers 81-88. Particularly in this embodiment, the first and

second folds

112 and 113 are along the width direction W orthogonal to the conveyance direction F.

The sheet 100 is folded at a vertical fold 111 that is a boundary line between the main body 102 and the side pieces 103, and has the shape shown in FIG. 2(b). Glue G is applied to the surface of the folded side piece 103.
Then, it is folded along the left-right width direction W at the first fold line 112, which is the boundary line between the bottom piece 101 and the main body 102, as shown in FIG. 2(c). At this time, both edges of the bottom piece 101 are joined to the side pieces 103 with glue G.

The sheet 100 is conveyed with the bottom plate 101 on the downstream side in the conveyance direction F and the flap 104 on the upstream side, and is made into a bag. In the state shown in FIG. 2C, the first fold 112 is the leading edge of the sheet 100 being conveyed, and the insertion slot 116 for the contents of the envelope 90, such as letter paper, various documents, advertisements, etc., is located at the first fold 112. It is located on the upstream side in the conveying direction F.

FIG. 3(a) shows a perspective view of the envelope 90 of FIG. 2(c). In the envelope 90a of FIG. 3(a), the flap 104 is not folded. If necessary, the envelope 90 may be further folded at the second fold 113, which is the boundary line between the main body 102 and the flap 104, so that the flap 104 covers the main body 102, as shown in FIG. 3(b). . In this case, the sheet 100 will be folded at four folds 110. According to the above configuration, when the contents are inserted into the insertion opening 116 of the envelope 90b and then sealed using tape or glue, the flap 104 must be neatly sealed on the folded bottom piece 101 because the envelope has a tendency to crease. Can be done.

[Supply section 1]
The supply unit 1 shown in FIG. 1 includes an air suction belt-type air supply unit 12, an elevator-type supply tray 11 that ascends and descends according to the amount of sheets 100 loaded, and sheets 100 fed out by the air supply unit 12. Furthermore, it has a conveyance roller 81 that conveys downstream in the conveyance direction F. The air supply unit 12 also includes a sensor 22 that detects that the uppermost sheet 100 of the sheets 100 stacked on the supply tray 11 is attracted to the lower surface of the air supply unit 12; A sensor 21 for detecting the upper limit of the stacked sheets 100 is arranged.

4 is a perspective view of the supply tray 11 of the supply section 1 and its surroundings, FIG. 5 is a view of FIG. 4 seen from the upstream side in the transport direction F, FIG. 6 is a plan view of FIG. 4, and FIG. 7 is a view of FIG. It is a sectional view taken along the line AA. The supply section 1 includes a guide 13, a guide section 15, and a support section 16. The guide 13 guides the side of the sheet 100. When the side edge 114 of the sheet 100 is not formed in a straight line like the sheet 100 shown in FIG. It contacts the side edge 115 of the formed side piece 103.

The guide 13 is installed in a notch 17 provided in the supply tray 11. The guides 13 are installed so as to be close to and apart from each other in the width direction W according to the size of the sheet 100. An endless guide belt 18 is installed above and below the guide 13 and extends around the guide belt 18 at a predetermined distance from the front and back. Each guide belt 18 is passed around a pair of left and right gears 19. The gear 19 is installed outside the left and right side plates 20. The gear 19 is rotatably supported on the side plate 20 by a shaft support 29 . A pair of upper and lower gears 19a shown on the right side in FIG. 5 are connected by a connecting portion 30.

The guide 13 includes a left guide 131 and a right guide 132. An upper portion 133 and a lower portion 134 of the left guide 131 are respectively fixed to upper and lower guide belts 18 that move rearward. An upper portion 135 and a lower portion 136 of the right guide 132 are respectively fixed to upper and lower guide belts 18 that move forward. The left guide 131 is fixed to the rear left part of the belt 18, and the right guide 132 is fixed to the front right part of the belt 18, and both are fixed at diagonal positions of the rotating guide belt 18.

The guide portion 15 guides the movement of the guide 13 in the width direction W. The guide section 15 includes a guide shaft 31 and a connecting member 34 . The guide shaft 31 is installed on the left and right side plates 20. The connecting member 34 is inserted through the guide shaft 31. The connecting member 34 is connected to the upper portions of both the left and right guides 13. From this, the guide 13 is vertically installed on the guide shaft 31 via the connecting member 34 and guided.

In FIG. 5, the operating section 14 is provided on the connecting member 34a shown on the right side. The operating unit 14 is provided for an operator to manually adjust and position the guide 13 in the width direction W. The operating section 14 includes a knob 141. By rotating the knob 141 by the operator, a state in which the guide 13 is fixed at a predetermined position in the width direction W and a state in which the guide 13 is movable in the width direction W are switched. When the operator manually moves the operating section 14 in the width direction W while the guide 13 is movable, the right guide 132 is moved. Then, the upper and lower guide belts 18 rotate by the same distance as the amount of movement of the right guide 132. The left guide 131 , which is connected to the right guide 132 at a diagonal position of the belt 18 , approaches and separates from the right guide 132 by the same distance as the movement amount of the right guide 132 .

The support portion 16 is installed inside the pair of guides 13. The support portion 16 supports the sheet 100 from below within the notch 17 of the supply tray 11 . The support portion 16 includes a support member 41, a swing shaft 42, and a negative member 43. The support member 41 is formed into a rod shape. The support member 41 is swingably supported on the lower surface of the supply tray 11 by a swing shaft 42 .

A locking portion 40 is provided at the upstream end portions of the left and right support members 41 in the conveyance direction F. The locking portion 40 is connected to and locked with the biasing member 43 below the supply tray 11. Both locking portions 40 are urged by a biasing member 43 in a direction toward each other.

A contact portion 39 is provided at the downstream end of the support member 41 . The contact portion 39 contacts and abuts the guide 13 . The abutting portion 39 is biased by the biasing force of the biasing member 43 in a direction that separates the pair of guides 13 from each other. Therefore, the contact portion 39 is always in contact with the inner surface of the guide 13. As the guide 13 is moved in the width direction W, the support member 41 swings about the swing shaft 42 . As the length between the guides 13 increases, the length between the left and right abutting portions 39 also increases accordingly.

The height of the upper surface of the support member 42 exposed from the notch 17 is set to the same height as the sheet 100 mounting surface of the supply tray 11. The cutout 17 is provided with a housing portion 44 that accommodates the exposed portion 45 of the support member 41 from the cutout 17 . When the left and right guides 13 are located closest to each other, the support member 41c is oriented along the conveyance direction F, as shown by the two-dot chain line in FIG. is accommodated in the accommodating portion 44.

[First crease processing section 2]
As shown in FIG. 1, the first crease processing section 2 is composed of an upper mold with a convex upper part and a lower mold with a concave lower part, and as the first fold 112 and the second fold 113 of the sheet 100, A horizontal crease is formed in a direction perpendicular to the conveying direction F of the sheet 100. As the crease processing section 2, a known mechanism can be adopted.

[Second crease processing section 4]
As shown in FIG. 1, the second crease processing section 4 has a lower crease blade with a round blade shape and a convex part formed on the outer periphery, and an upper blade with a round blade shape and a concave part formed on the outer periphery part. They are arranged at two locations in the width direction W perpendicular to the conveyance direction F, and are configured to form vertical creases along the conveyance direction F of the sheet 100 at the longitudinal folds 111 (two locations) of the sheet 100. As the second crease processing section 4, a known mechanism can be adopted.

[First folding part 3]
The first folding section 3 folds the sheet 100. The first folding unit 3 serves as a means for folding the left and right side pieces 103 of the sheet 100, and includes a pair of folding devices (a first It consists of a folding device 3a and a second folding device 3b). Further, an upper guide plate 36 is provided above the lower guide plate 33 with a predetermined gap, and a pair of conveying rollers 84 (driving roller 38 and driven roller 35).

[Glue application section 5]
The glue applicator 5 applies glue to a predetermined position on the sheet 100 along the conveyance direction F of the sheet 100. The glue applicator 5 includes a pair of

applicators

5a and 5b arranged opposite to each other on both sides in the width direction W. Note that the coating device 5a and the coating device 5b have a laterally symmetrical configuration.

The

coating devices

5a and 5b have a nozzle section, a position setting mechanism, and a vertical drive mechanism (not shown). The nozzle section is configured to apply glue to the sheet 100 being conveyed at a predetermined timing.

[Second folding section 6]
The second folding section 6 folds the sheet 100. The second folding portion 6 constitutes the folding portion of the present invention. The second folding unit 6 is a paper folding device that folds the planar sheet 100 while conveying it along the conveying surface 200. FIG. 8 is a diagram showing a schematic configuration of the second folding section 6. As shown in FIG. The second folding section 6 includes a pair of conveying

rollers

86 and 87, a pair of front and rear guide plates 65, a switching section 63, and a folding guide 62.

The conveyance roller pair 86 is disposed on the upstream side in the conveyance direction F of the sheet 100, and the conveyance roller pair 87 is disposed on the downstream side of the conveyance roller pair 86 in the conveyance direction F of the sheet 100. The guide plate 65 is erected above both

upper transport rollers

861 and 871 of the

transport roller pair

86 and 87. The guide plate 65 includes a rear guide plate 66 and a front guide plate 67. The rear guide plate 66 guides the sheet 100 upward, which has reached above the upper roller 861 of the transport roller pair 86. The front guide plate 67 guides the sheet 100 upward, which has reached above the upper roller 871 of the transport roller pair 87.

The switching unit 63 is installed between both pairs of

conveyance rollers

86 and 87. The switching unit 63 interferes with the sheet 100 being conveyed on the conveyance surface 200 and guides the front end or edge of the sheet 100 above the conveyance surface 200 . The switching section 63 is swingable around the support shaft 631. The switching unit 63 is swung between a parallel posture P, a forward upward posture Q, and a backward upward posture U. The parallel posture P is a posture substantially parallel to the conveyance surface 200, as shown by the solid line in FIG. In the parallel position P, the switching unit 63 guides the sheet 100 in a substantially horizontal direction toward the nip 873 of the pair of conveying rollers 87 in the front.

The forward upward posture Q is indicated by a dashed line in FIG. The forward upward posture Q is inclined with respect to the conveyance surface 200 so that the front part is located above the conveyance surface 200 and the rear part is located below the conveyance surface 200. In the forward upward position Q, the front end of the sheet 100 is guided above the upper roller 871 of the forward pair of conveyance rollers 87 . The front end of the seat 100 is further guided by a guide plate 67 installed above the front end.

The backward upward posture U is indicated by a chain double-dashed line in FIG. The rear upward posture U guides the edge of the sheet 100 above the conveying surface 200. In the rear upward position U, the edge of the sheet 100 is guided above the upper roller 861 of the rear pair of conveying rollers 86 . The edge of the sheet 100 is further guided by a guide plate 66 installed above the edge.

The folding guide 62 is arranged above the switching section 63. The folding guide 62 is formed into a substantially U-shape when viewed from the side. The folding guide 62 includes an upper guide part 625, a front guide part 626, an inclined guide part 627, and a rear guide part 628. The upper surface guide portion 625 maintains a posture substantially parallel to the conveyance surface 200 and extends in the width direction W. The upper surface guide portion 625 guides the upper surface of the sheet 100. The front guide section 626 is provided upright at the front end of the upper surface guide section 625. The front guide section 626 upwardly guides the front end of the sheet 100 that has been guided above the conveyance surface 200 by the switching section 63 . A front edge 621 is provided at a connecting portion between the top guide portion 625 and the front guide portion 626 . The front edge 6221 contacts the crease 100 and acts to fold the sheet 100 when the folding guide 62 descends and folds the sheet 100. The front guide portion 626 guides the front portion of the sheet 100 along the vertical direction when the front edge 621 contacts the fold and folds the sheet 100.

The inclined guide part 627 is provided at the edge of the upper surface guide part 625. The inclined guide portion 627 allows the edge of the sheet 100 to be guided by the upper surface when the rear portion of the sheet 100 is folded at the second fold 113 set in a direction intersecting the conveyance direction F and then conveyed downstream. It guides the user to enter the gap between the section 625 and the switching section 63.

The rear guide section 628 is provided upright on the edge of the inclined guide section 627. The rear guide section 628 upwardly guides the edge of the sheet 100 that has been guided above the conveyance surface 200 by the switching section 63 . The rear guide portion 628 guides the rear portion of the sheet 100 along the vertical direction when the folding guide 62 descends and folds the sheet 100.

The folding guide 62 is configured to be movable in the vertical direction while maintaining the upper guide portion 625 along the conveying surface 200 which is substantially horizontal. The folding guide 62 is raised and lowered between the folding position and the retracted position. At the folding position, the folding guide 62 approaches the switching section 63 in the parallel position P, and folds the sheet 100. At the retracted position, the folding guide 62 is retracted from the switching section 63 and is located at a position separated by a predetermined distance.

[Pressure section 8]
The pressurizing section 8 includes an upper mold 8a that is movable in the width direction W perpendicular to the conveyance direction F, and a lower mold 8b that extends within the movement range of the upper mold 8a. By moving the upper mold 8a in the width direction W, the sheet 100 folded at the first and

second folds

112 and 113 set in the direction crossing the conveying direction F at the second folding section 6 is , the

second folds

112, 113 are pressed so that the sheet 100 is more reliably folded at the first and

second folds

112, 113.

[Receiving part 7]
The receiving section 7 constitutes the conveying device of the present invention. The receiving section 7 includes a pair of transport rollers 88, a conveyor 72, and a stacking section 71. The transport roller pair 88 constitutes the discharge section of the present invention. The conveyor roller pair 88 discharges the sheet 100 onto the conveyor 72 . The conveying roller pair 88 is installed near the conveying roller pair 87 of the second folding section 6, as shown in FIG. The conveyance roller pair 88 is installed downstream of the pressure unit 8 in the conveyance direction F. The transport roller pair 88 is installed upstream of the conveyor 72.

9 is a perspective view of the conveyor 72 and its surroundings, FIG. 10 is a side view of FIG. 9, FIG. 11 is a plan view of FIG. 9, and FIG. 12 is a view of FIG. 10 viewed from the downstream side in the conveyance direction F. . The conveyor 72 includes a belt 73, a roller 77, a presser 78, a support member 76, and an angle adjustment section 79.

The belt 73 constitutes the conveyance section of the present invention. The belt 73 conveys the folded sheet 100. The conveyance direction of the folded sheet 100 by the belt 73 is the same as the conveyance direction F by the conveyance roller pair 81-88. The height of the conveying surface 201 of the sheet 100 by the belt 73 is set to a lower position than the conveying surface 200 of the sheet 100 by the pair of conveying rollers 81-88. The belt 73 is formed in an endless shape and is passed around rollers 77 that are arranged at a predetermined distance in the front and back of the sheet 100 in the conveying direction F.

The pair of front and rear rollers 77 includes a rear roller 74 and a front roller 75. The rear roller 74 is rotatably supported by the side plate 20. The rear roller 74 is connected to the fourth driving section 94 via a connecting section 96 . The presser 78 is installed above the support member 76. The presser 78 is supported by the support member 76. The presser 78 presses the sheet 100 discharged downstream on the upper surface of the belt 73 with a predetermined pressing force.

The support member 76 includes a pair of left and right side members 50 and links 51 . The side members 50 are installed on the left and right sides of the belt 73. The front end of the side member 50 rotatably supports a rear roller 74, and the end edge supports a front roller 75, respectively. A handle 49 is provided on the side member 50. Note that the handle 49 may be provided on a vertical member 53 or a horizontal member 53 of the link member 50, which will be described later, instead of the side member 50.

The link 51 is formed into an L-shape when viewed from the side. The link 51 includes a vertical member 53 and a horizontal member 54. The upper end of the vertical member 53 is rotatably connected to the front end of the side member 50. The lower end of the vertical member 53 and the front end of the horizontal member 54 are integrally connected at a substantially right angle. The edge of the loading section 71 is connected to this connecting portion.

The end edges of the left and right horizontal members 54 are connected by an erection shaft 56. The construction shaft 56 projects outward from the horizontal member 54 . Locking portions 57 are provided at both left and right ends of the construction shaft 56 . The locking portion 57 is locked in a guide hole 58 of the angle adjustment portion 79.

The angle adjustment section 79 adjusts the installation angle of the belt 73. From this, the angle adjustment section 79 adjusts the angle of the conveyance surface 201 of the sheet 100 by the belt 73. The angle adjustment section 79 includes a folding adjustment section 96. The fold adjustment unit 96 adjusts the folding adjustment unit 96 of the sheet 100 when the sheet 100 folded in a direction crossing the conveyance direction F of the belt 73 as a conveyance unit is discharged onto the belt 73 by a pair of conveyance rollers 88 as a discharge unit. The angle of the conveying surface 201 is adjusted depending on the folded state.

The folding adjustment section 96 includes a tilting section 97 and a lying section 98 . When the folded sheet 100 is discharged from the first fold line 112 along the conveyance direction F of the belt 73 as a conveyance section by a pair of conveyance rollers 88 as a discharge section, the tilting section 97 is configured to The conveyance surface 201 is tilted at a predetermined angle. In the flattening section 98, the folded sheet 100 on which the first fold line 112 is formed is moved along the conveyance direction F of the belt 73 as a conveyance section by a pair of conveyance rollers 88 as a discharge section, with the first fold line 112 at the beginning. After the sheet 100 is discharged by a predetermined amount, the conveying surface 201 is laid flat along the horizontal direction when the sheet 100 is reversely run toward the upstream side to form the second fold line 113.

The angle adjustment section 79 includes a guide hole 58. The guide hole 58 guides the locking part 57 and makes the conveyance surface 201 have a plurality of angles. The guide hole 58 includes a horizontal guide part 580, first to third guide parts 581 to 583, and a storage guide part 584. The horizontal guide portion 580 locks the locking portion 57 so that the conveying surface 201 of the sheet 100 by the belt 73 is along the horizontal direction. The first to third guide portions 581 to 583 lock the locking portions 57 so that the conveying surface 201 of the sheet 100 is at three different angles. The storage guide portion 584 guides the locking portion 57 to fold the conveyor 72 when storing the device.

The loading section 71 is installed on the downstream side of the belt 73 as a conveying section. The stacking section 71 stacks a plurality of sheets 100 vertically. The stacking section 71 includes a stacking tray 70 . The stacking tray 70 is installed at a position lower than the sheet 100 conveyance surface 201 of the belt 73 and extends forward. The loading portion 71 maintains a substantially horizontal position, with the front end being slightly higher than the edge. When the loading section 71 is stored, it is swung relative to the support member 76, is tilted down in the vertical direction, and is suspended from the support member 76.

A pair of upper and lower guides 89 that guide the sheet 100 on the transport surface 200 are installed downstream of the transport roller pair 88 . The upstream end and, if necessary, the downstream end of both guides 89 are wide open in a tapered shape when viewed from the side. A sheet 100 is inserted between both guides 89.

Next, the operation of the bag making machine 10 having the above configuration will be explained.
The operator loosens the knob 141 to make the guide 13 movable in the width direction W. The operator places a plurality of sheets 100 on the supply tray 11 with the bottom piece 101 facing downstream in the transport direction F and the flap 104 facing upstream in the transport direction F. Then, in accordance with the size of the seat 100, the guide 13 is positioned at a position where it abuts the left and right edges 115 of the side pieces 103 of the seat 100.

Since both the

upper end portions

133, 135 and the

lower end portions

134, 136 of the left and right guides 13 are fixed to predetermined positions on the guide belt 18, only one of the

upper end portions

133, 135 and the

lower end portions

134, 136 is fixed. Compared to the case where it is fixed, it is properly erected along the vertical direction, and the problem of tilting is less likely to occur. The guide 13 extends along the vertical direction and can appropriately guide the side edge 115 of the sheet 100.

The support member 41 swings about the swing shaft 42 as the guide 13 moves in the width direction W. As described above, since the support part 16 is provided in the notch 17, even if the notch 17 is formed in the supply tray 11, the sheet 100 can be supported by the support part 16 in the notch 17. can. It is possible to suppress the sheet 100 from hanging down inward of the notch 17, and it is possible to convey the sheet 100 appropriately.

The support member 41 swings about a swing shaft 42 located at the center of the supply tray 11 in the conveyance direction F, so that the sheet cut out in the shape shown in FIG. 2(a) is placed on the supply tray 11. When the device 100 is placed, the support portion 16 can be positioned on the side piece 103.

As shown in FIG. 13, as the size of the sheet 100 increases, the lengths in both the conveying direction F and the width direction W tend to increase. When placing a large size sheet 100L, it is necessary to make the distance of the guide 13 longer than when placing a small size sheet 100S. At this time, as the guide 13 moves outward in the left-right width direction W, the contact portion 39 of the support member 41 swings about the swing shaft 42 while contacting the guide 13, and The sheet 100S moves rearward from when it was placed.

The length of the bottom piece 101 in the transport direction F of the large size sheet 100L is usually longer than that of the small size sheet 100S. The side piece 103 of the large size sheet 100L placed on the supply tray 11 is located at the rear of the side piece 103 of the small size sheet 100S. The movement of the contact portion 39 accompanying the movement of the guide 13 corresponds to a change in the position of the side piece 103 of the sheet 100. The side piece 103 that tends to fall inward of the notch 17 can be supported by the abutment part 39 that has been moved to the opposite position. In this way, even when a plurality of types of sheets 100 having different lengths in the width direction W are supplied, the position corresponding to the side piece 103 of the sheet 100 can be properly supported from below by the support section 16. .

When the operator performs an operation to start the bag making machine 10, the bag making machine 10 operates as follows.
(1) The uppermost sheet 100 on the supply tray 11 is sent out toward the transport roller pair 81 while being attracted by the air suction belt in the air supply unit 12, and after the sheet 100 is delivered to the transport roller pair 81. , and is further transported downstream in the transport direction F by the transport roller pair 81. Thereafter, it passes through the first crease processing section 2. At this time, the first crease processing section 2 operates to form creases on the first fold line 112 and the second fold line 113 of the sheet 100. Thereby, the bottom piece 101 can be easily folded back toward the main body 102 side. Further, the flap 104 can be easily folded back toward the folded bottom piece 101.

(2) The sheet 100 conveyed from the first crease processing section 2 passes through the second crease processing section 4. At this time, the vertical folds 111 (two places on the left and right in the width direction W) of the sheet 100 are directly below the crease blades (round blades) of the second crease processing section 4 installed at two places in the width direction W in the direction perpendicular to the conveyance direction F. are located in each. Then, the second crease processing section 4 operates to form a crease on the vertical fold 111. Thereby, the side pieces 103 (two places on the left and right in the width direction) can be easily folded back inward.

(3) The sheet 100 on which the crease has been formed by the second crease processing section 4 stops at the first folding section 3. By forming a crease in advance on the vertical crease 111 when the side piece 103 of the sheet 100 is folded, the accuracy of the crease position when folding the flap can be ensured.

As shown in FIG. 5, in the first folding section 3, in addition to the basic structure of folding the side piece 103 by the folding plate 32, an upper guide plate 36 is installed above the lower guide plate 33 with a predetermined gap. and a pair of conveyance rollers (a driving roller 38 and a driven roller 35) that convey the sheet 100 conveyed on the lower guide plate 33 further downstream. Note that a notch is formed in the lower guide plate 33 at the nip between the pair of conveyance rollers.

In FIG. 5A, the folding plate 32 of the folding device 3a (3b) of the first folding section 3 is located on the outside in the width direction W, and the side pieces 103 on both sides of the sheet 100 are placed on the folding plate 32. It is placed (placement position).

Next, in FIG. 14(b), the folding plate 32 rotates toward the inner lower guide plate 33, whereby the side piece 103 is folded inward at the crease-processed vertical fold 111, and as shown in FIG. 5(c), it is superimposed on the main body 102 via the upper guide plate 36 (overlapping position).

Thereafter, in FIG. 14(d), the folding plate 32 rotates in the direction away from the outer lower guide plate 33. Then, the sheet 100 with the side pieces 103 folded is conveyed downstream in the conveyance direction F by the pair of conveyance rollers (the driving roller 38 and the driven roller 35). By rotating the folding plate 32 in a direction away from the lower guide plate 33 by at least a predetermined angle before starting to convey the sheet 100, the sheet 100 after the folding process can be folded into a folded plate or a pair of upper and lower guide plates. The sheet 100 at the folding position can be smoothly transported downstream in the transport direction F without being interfered with by the folding process.

In FIGS. 14(a) to 14(d) described above, an upper guide plate 36 and a driven roller 35 for holding the sheet 100 on the upper guide plate 36 are provided, and the folding means bends the side pieces 103 of the sheet 100. When doing so, the control device stops the driving of the pair of transport rollers (drive roller 38 and driven roller 35) at the bending processing position, stops transport of the sheet 100, and moves the main body 102 of the sheet 100 to the The side pieces 103 of the sheet 100 are controlled to be bent while being held between the pair of conveying

rollers

38 and 35.

According to the above, while the main body 102 of the seat 100 is held between the pair of upper and

lower guide plates

36 and 33, the side pieces 103 of the seat 100 are folded onto the upper surface of the upper guide plate 36, and at the same time, the main body 102 of the seat 100 is The side pieces 103 of the sheet 100 are bent while the main body 102 is held between the pair of

conveyance rollers

36 and 33. Therefore, the accuracy of the crease position when folding the side piece 103 can be further ensured.

(4) The sheet 100 with the side pieces 103 folded is conveyed downstream in the conveying direction F by the pair of conveying rollers 85 and passes through the glue applicator 5 . In the glue application section 5, when the folded side pieces 103 on both sides of the sheet 100 start passing, the

nozzle sections

5a and 5b installed at two locations in the width direction W perpendicular to the conveyance direction F move downward. When the

nozzle parts

5a and 5b come into contact with the surface of the side piece 103 and the passage of the side piece 103 is completed, the

nozzle parts

5a and 5b move upward and separate from the surface of the side piece 103. As a result, glue is applied to the surface of the folded side piece 103. Note that the folded side pieces 103 move the

nozzle parts

5a, 5b in a pressed state or after being pressed by the transport roller pair 85 located upstream of the

nozzle parts

5a, 5b in the transport direction F. pass. Therefore, the glue application work using the

nozzle parts

5a and 5b can be performed stably.

(5) The sheet 100 with glue applied to the side pieces 103 is transported to the second folding section 6 by the transport roller pair 85. The width of the upper roller 861 of the pair of conveyance rollers 86 is set so that it does not come into contact with the surface of the side piece 103, so that the glue applied to the side piece 103 of the sheet 100 in the glue application section 5 is transferred to the conveyance roller. It will not stick to pair 86.

The switching unit 63 is set in a forward upward posture Q in which the front side is inclined upward. Therefore, as shown in FIG. 15, the sheet 100 is guided upward by the switching unit 63 so that the edge 118 of the sheet 100 passes through the surface of the upper roller 871 of the conveying roller pair 87, and the front guide plate 67 It is inserted between the front guide parts 626. When the first fold 112 of the sheet 100 reaches the position of the front edge 621, the control device stops the third drive unit 93. Conveyance of the sheet 100 is temporarily stopped. Note that during this time, the folding guide 62 maintains the retracted position.

As shown in FIG. 16, while the folding guide 62 maintains the retracted position, the switching section 63 is switched to the parallel posture P parallel to the conveyance direction F.

Then, the folding guide 62 is lowered from the retracted position to the folding position while maintaining its posture. As shown in FIG. 17, the sheet 100 on the switching section 63 is sandwiched between the switching section 63 and the upper guide section 625. The bottom piece 101 of the sheet 100 extends in the vertical direction between the rear part of the upper roller 871 and the front guide part 626. The first fold 112 is brought into contact with the front edge 621 and is pressed and bent.

At this time, the distance between the switching part 63 and the upper guide part 625 of the folding guide 62 after being lowered is at least a predetermined distance that allows the sheet 100 to pass between the switching part 63 and the upper guide part 625. . For example, a gap of approximately 1 mm is ensured.

After folding the bottom piece 101 of the sheet 100 by lowering the folding guide 62, the control device drives the third drive unit 93. The sheet 100 is conveyed by the pair of conveying rollers 86 toward the nip 873 of the pair of conveying rollers 87 on the downstream side. The sheet 100 is folded at the first fold line 112 by nipping the first fold line 112 between the nip 873 of the pair of conveying rollers 87 .

As shown in FIG. 18, the sheet 100 is conveyed by a pair of conveyance rollers 87 while the bottom piece 101 is sequentially stacked on the main body 102. Both ends of the bottom piece 101 in the width direction W are overlapped with the side piece 103 folded inward and joined to the side piece 103 by applied glue. As a result, a Western-style envelope 90 is obtained.

When stacking the sheet 100 on the stacking section 71 with the flap 104 not folded, the sheet 100 is transported to the pressure section 8 by the transport roller pair 87 . When the first fold 112 reaches the pressure section 8, the control device stops the third drive section 93. From this, conveyance of the sheet 100 is stopped, and the control device moves the upper die 8a in the width direction W to apply pressure to the first fold line 112. The sheet 100 is folded more reliably at the first fold line 112.

Thereafter, the sheet 100 is discharged onto the conveyor 72 by the conveyance roller pair 88. The control device controls the driving of the third and

fourth drive units

93 and 94 so that the plurality of sheets 100 are shifted by a predetermined amount on the conveyor 72 and are discharged in a stacked state. For the transport roller pair 88 and the conveyor 72, the timing at which the sheet 100 is discharged and the amount by which the belt 73 travels are adjusted.

The control device also controls the third drive section 93 to move the sheet 100 from a pair of conveyance rollers 88 as a discharge section installed upstream of the belt 73 as a conveyance section toward the belt 73 as a conveyance section. When discharging the sheet 100, the sheet 100 is conveyed by a belt 73 serving as a conveyance unit, in which the angle of the conveyance surface 201 of the sheet 100 is adjusted according to the folded state of the sheet 100.

Since the bottom piece 101 is folded along the fold line 110 set in a direction crossing the conveyance direction F, when the edge 118 of the bottom piece 101 of the sheet 100, which becomes the envelope insertion opening 116, is conveyed by the belt 73, It is located upstream of the first fold 112. In this case, as shown in FIG. 19, the first fold 112b, which is the leading part of the following sheet 100b, collides with the edge 118 of the bottom piece 101 of the preceding sheet 100a, which may cause a jam. .

Therefore, the belt 73 serving as a conveying unit is folded in a direction intersecting the conveying direction F to form a fold 110, and with the fold 110 at the beginning, the belt 73 serving as a conveying unit is folded along the conveying direction F as a discharge unit. When the sheet 100 is discharged, the conveyance roller pair 88 tilts the conveyance surface 201 of the sheet 100 at a predetermined angle. Therefore, the operator manually tilts the conveyor 72. As shown in FIG. 20, the conveying surface 201 of the sheet 100 on the locking portion belt 73 is tilted at a predetermined angle. The edge 118 of the bottom piece 101 is at a position lower than the discharge height of the pair of conveying rollers 88, making it difficult to interfere with the first fold 112b of the subsequent sheet 100b. Therefore, as shown in FIG. 21, it is possible to transport the sheets 100 in a proper overlapping manner by a predetermined amount one after another. The sheets 100 on the conveyor 72 are conveyed to the stacking section 71. Then, they are vertically aligned and stacked on the stacking tray 70.

When stacking the sheet 100 on the stacking section 71 with the flap 104 folded, after forming the first fold 112 in FIG. The control device stops the third drive section 93. From this, conveyance of the sheet 100 is stopped. The flap 104 is sandwiched between the upper guide portion 625 of the folding guide 62 and the switching portion 63. On the other hand, the bottom piece 101 and the main body 102 are in a nipped state by the pair of conveyance rollers 87 and the pair of conveyance rollers 88 on the downstream side.

Thereafter, the control device raises the folding guide 62 and switches the switching section 63 to the backward upward posture U. The switching section 63 is inclined so that the rear end is above the conveying surface 200 of the sheet 100 and the front end is below the conveying surface 200. Then, the control device controls the third drive unit 93 to reversely rotate the conveying roller pairs 86, 87, and 88, and convey the sheet 100 toward the upstream side opposite to the conveying direction F.

When the size of the flap 104 is greater than or equal to a predetermined value and the distance between the second folding section 6 and the pair of conveying rollers 88 serving as a discharge section is less than or equal to a predetermined value, the sheet 100 is moved in the reverse direction to be folded at the second fold 113. When doing so, the bottom piece 101 may pass through the nip 883 of the pair of conveying rollers 88, and the edge 118 of the bottom piece 103 may be located on the downstream side of the nip 883 of the pair of conveying rollers 88. At this time, if the conveyance surface 201 of the sheet 100 of the belt 73 is inclined as in the case where the flap 104 is not folded, the downstream portion of the sheet 100 in the conveyance direction F becomes lower, as shown in FIG. It tends to hang down toward the conveying surface 201 of the belt 73. The bottom piece 101 separates from the main body 102, the edge 118 of the bottom piece 101 separates from the main body 102, and the insertion opening 116 for the contents opens.

In this state, when the sheet 100 is run backwards in order to fold it along the second fold 113, the edge 118 of the bottom piece 101 is not properly inserted into the nip 883 of the conveying roller pair 88, and a jam occurs. There is a fear.

Therefore, the sheet 100 that has already been folded in this way and has the first fold 112 formed thereon is moved in the transport direction F of the belt 73 as a transport unit by a pair of transport rollers 88 as a discharge unit, with the first fold 112 at the beginning. When the sheet 100 is to be run backwards toward the upstream side to form the second fold line 113 after a predetermined amount has been discharged along the belt 73, the conveying surface 201 of the sheet 100 of the belt 73 is moved along the horizontal direction. By laying it flat, you can suppress the occurrence of jams.

Therefore, the operator manually adjusts the angle of the belt 73 using the angle adjustment section 79. The operator positions the locking part 57 on the horizontal guide part 580. Then, the belt 73 is placed in a prostrate position by the prostrate portion 98. As a result, as shown in FIG. 22, the conveying surface 201 of the belt 73 becomes substantially horizontal. The first fold 112 is higher than when the belt 73 is tilted and is supported from below by the belt 73 at a position close to the discharge height of the pair of transport rollers 88 . In this state, when the control device runs the pair of conveying rollers 88 in the reverse direction, the edge 118 of the bottom piece 101 can be inserted into the nip 883 of the pair of conveying rollers 88 together with the main body 102, and the sheet 100 can be conveyed appropriately. .

As shown in FIG. 24, the edge 117 of the flap 104 is guided by the switching section 63 and conveyed upward from the front surface of the upper roller 861. Furthermore, it is guided by the guide plate 66 above the upper roller 861 and the rear guide portion 628 of the folding guide 62, and reaches above the upper roller 861. When the second fold 113 reaches the position of the inclined guide section 627 of the fold guide 62, the control device stops the third drive section 93 and stops conveyance of the sheet 100. The control device swings the switching unit 63 to the parallel position P and lowers the folding guide 62. From this, the sheet 100 is folded along the second fold line 113, as shown in FIG.

Then, the control device reversely rotates the conveyance roller pairs 86, 87, and 88 by reversely rotating the third drive section 93. The sheet 100 is run backwards toward the nip 863 of the pair of transport rollers 86 with the second fold 113 at the beginning. The sheet 100 is folded at the second fold 113 by being nipped by the nip 863 of the conveyance roller pair 86 .

The flap 104 is guided by the guide plate 66 and the rear guide portion 828 of the folding guide 62, and is sequentially drawn into the nip 863 and held there by the reverse movement of the pair of conveyance rollers 86. When the edge 117 of the flap 104 passes in front of the upper roller 891 and reaches the vicinity of the nip 863 of the pair of transport rollers 86, the control device stops the third drive unit 93 and stops transporting the sheet 100 upstream. do. After that, the control device switches and drives the third drive section 93 in the forward direction. The transport roller pairs 86, 87, and 88 rotate in the forward direction and transport the sheet 100 downstream in the transport direction F.

The edge 117 of the flap 104 is guided by the inclined guide part 627 and inserted between the switching part 63 and the upper guide part 625. The sheet 100 is conveyed downstream in the conveyance direction F through a gap between the switching section 63 in the parallel posture P and the upper guide section 62 while being guided by both of them. According to this, the sheet can be reliably transferred to the pressing section formed by the nip 873 of the pair of conveying rollers 87 at the next stage without wrinkles or the like.

When the second fold 113 reaches the pressure section 8, the control device stops the third drive section 93. The control device moves the upper mold 8a in the width direction W and pressurizes the second fold 113.

The control device drives the third drive unit 93 so that the sheet 100 is discharged onto the upper surface of the conveyor 72 by the pair of conveyor rollers 88 . Similar to when the flap 104 is not folded, the sheets 100 are shifted by a predetermined amount on the conveyor 72 and are sequentially conveyed to the downstream side in an overlapping state, as shown in FIG.

Also in FIG. 26, since the bottom piece 101 is folded at the first fold 111, which is the fold 110 set in a direction intersecting the conveying direction F, the edge 118 of the bottom piece 101 becomes the insertion opening 116 of the envelope 90. is located upstream of the first fold 112. However, since the flap 104 is folded and placed over the bottom piece 102, as shown in FIG. There is no problem that the first folds 112b collide and jam occurs.

In the case of folding the flap 104 shown in FIG. 27, when the succeeding sheet 100b is discharged by the conveyance roller pair 88, the first fold 112b of the succeeding sheet 100b interferes with the flap 104a of the preceding sheet 100a. The lower surface of the main body 102b of the following sheet 100b is conveyed while being in contact with the upper surface of the flap 104a of the preceding sheet 100a that is stopped on the belt 73. The succeeding sheet 100b is ejected while pressing the flap 104a of the preceding sheet 100a against the bottom piece 101a. In this manner, when the flap 104 is folded, the belt 73 is laid flat, so that the plurality of

sheets

100a and 100b can be properly conveyed in a stacked state shifted by a predetermined amount.

The sheets 100 on the conveyor 72 are conveyed to the stacking section 71. Then, they are vertically aligned and stacked on the stacking tray 70.

As described above, the conveyance device according to the present embodiment includes the belt 73 as a conveyance unit that conveys a folded sheet, and the conveyance roller that is installed upstream of the belt 73 and serves as a discharge unit that discharges the sheet 100 to the belt 73. Since the pair 88 and the angle adjustment unit 79 that adjusts the angle of the conveying surface 201 of the sheet 100 of the belt 73 are provided, since the sheet 100 is folded, the preceding sheet 100a and the succeeding sheet 100b interfere with each other. When there is a possibility that a jam may occur, the angle of the conveyance surface 201 can be adjusted to avoid interference, and the sheet 100 can be conveyed appropriately.

In addition, the angle adjustment section 79 is configured such that the sheet 100 folded along the fold line 110 set in a direction intersecting the conveyance direction F of the belt 73 as a conveyance section is discharged onto the belt 73 by a pair of conveyance rollers 88 as a discharge section. When folding the sheet 100, the sheet 100 is folded in a direction intersecting the conveying direction F, since the folding adjustment section adjusts the angle of the conveyance surface 201 according to the folded state of the sheet 100. When the end portion interferes with another sheet 100, the angle of the conveying surface 201 can be adjusted by the folding adjustment section 96.

The folding adjustment section 96 is configured to adjust the folding adjustment section 96 when the folded sheet 100 is discharged along the conveyance direction F of the belt 73 as a conveyance section by a pair of conveyance rollers 88 as a discharge section with the fold line 110 as the leading edge. , is provided with a tilting section 97 that tilts the conveyance surface 201 at a predetermined angle, so that by tilting the conveyance surface 201 with the tilting section 97, the preceding sheet 100a is conveyed to the downstream side at a position lower than the discharge height of the conveyance roller pair 88. Therefore, it is possible to avoid interference with the subsequent sheet 100b discharged by the pair of transport rollers 88.

Further, in the folding adjustment section 96, the folded sheet 100 with the first fold 112 formed thereon is transferred to the belt 73 as a conveying section by a pair of conveying rollers 88 as a discharging section with the first fold 112 at the beginning. After the sheet is discharged by a predetermined amount along the conveyance direction F, when the sheet is reversely run toward the upstream side to form the second fold 113, a flattening part is provided to lie flat the conveyance surface along the horizontal direction. Therefore, when the sheet 100 is run backwards to be folded along the second fold line 113, the end of the sheet 100 folded at the first fold line 112 interferes with the pair of conveying rollers 88 and is not conveyed properly. Jams can be avoided.

Furthermore, since the stacking section 71 for stacking a plurality of sheets 100 vertically is provided downstream of the pair of conveying rollers 88 as the conveying section, folded sheets can be properly stacked on the stacking section 71.

Further, the bag making machine according to the present embodiment applies glue to the

folding sections

3 and 6 provided upstream of the belt 72 as a conveying section for folding the sheet 100, and to predetermined positions of the sheet along the conveying direction of the sheet. Since the sheet 100 is folded in the

folding parts

3 and 6, and the glue is applied in the glue application part 5, the folded sheet can be folded when manufacturing an envelope. 100 can be transported appropriately.

Further, a folding section that folds the sheet and a glue application section that applies glue to a predetermined position of the sheet along the conveyance direction of the sheet, which are provided upstream of the conveyance section, A bag making machine comprising the conveying device according to item (1).

In the above embodiment, the conveyor 72 as a conveyance device was installed in the receiving section 7 of the bag making machine 10, but the present invention is not limited thereto, and the conveyor 72 may be a device without a folding section or a glue application section. Therefore, for example, it may be a device that conveys sheets manually folded by a worker, or it may be installed in a paper folding machine equipped with a folding unit that automatically folds cards, stationery, paper, etc., and the device conveys the folded sheets. may be transported.

Further, although the angle adjustment section 79 includes the folding adjustment section 96, the direction in which the sheet is folded may be parallel to the conveyance direction. When there is a possibility that a sheet folded with folds parallel to the conveying direction may interfere with the front and rear sheets, the sheet can be conveyed appropriately by adjusting the angle of the conveying surface of the sheet. Further, although the conveyance unit is configured by the belt 73 that is passed around the front and

rear rollers

74 and 75, it is not limited to this, and may be configured by one or more rollers, and the conveyance unit may be configured by one or more rollers. A guide may be provided to guide you.

Further, the sheet conveyance surface may be inclined upwardly. Thus, by conveying the folded sheet while pressing its leading edge against other parts of the sheet, it is possible to prevent the user from viewing the rollers or other sheets. Further, only one of the tilting part and the lying part may be provided.

Further, the receiving section 7 includes a stacking section 71 on the downstream side of the belt 73 serving as a conveying section, but instead of stacking a plurality of sheets vertically, the sheets are stacked in a sashimi-like manner, shifted by a predetermined amount. Good too. In this case, it is possible to create a configuration without the loading section by providing an angle adjusting section and allowing the worker to collect the sheets as appropriate while stacking them on the angle-adjustable belt, or by installing another conveyor on the downstream side. It may be installed. Alternatively, the folded sheet may be placed in an upright state.

It can also be implemented as a paper folding machine (paper folding device) that simply folds the sheet 100. Note that the present invention is not limited to the embodiments described above, and can be implemented with various modifications. Although the bag-making machine 10 is a device for producing Western envelopes, the present invention is not limited thereto, and may also produce Japanese envelopes or diamond envelopes.

Reference Signs List 10 Bag making machine, 5 Glue application section, 71 Loading section, 79 Angle adjustment section, 96 Folding adjustment section, 97 Tilting section, 98 Flattening section.

Claims

a conveyance unit that conveys the folded sheet; a discharge unit that is installed upstream of the conveyance unit and discharges the sheet to the conveyance unit; and an angle adjustment that adjusts the angle of the sheet conveyance surface of the conveyance unit. A conveying device equipped with a section.
The angle adjustment unit adjusts the folded state of the sheet when the sheet is folded along a fold set in a direction intersecting the conveyance direction of the conveyance unit and is discharged to the conveyance unit by the discharge unit. The conveyance device according to claim 1, further comprising a folding adjustment section that adjusts the angle of the conveyance surface according to the angle of the conveyance surface.
The folding adjustment unit includes a tilting unit that tilts the conveyance surface at a predetermined angle when the folded sheet is discharged by the discharge unit along the conveyance direction of the conveyance unit with the fold as the leading edge. The conveying device according to claim 2, further comprising: a.
The folding adjustment unit is configured to: after the folded sheet with the first fold formed thereon is discharged by the discharge unit by a predetermined amount along the conveyance direction of the conveyance unit, with the first fold at the beginning; 4. The method according to claim 2, further comprising a flattening section that flattens the conveying surface along a horizontal direction when the sheet is reversely run toward the upstream side to form the second fold. Conveyance device.
The conveying device according to any one of claims 1 to 4, further comprising a stacking section that stacks a plurality of sheets vertically on the downstream side of the conveying section.
Any one of claims 1 to 5, comprising: a folding unit that folds the sheet and a glue application unit that applies glue to a predetermined position of the sheet along the conveyance direction of the sheet, which is provided upstream of the conveyance unit; A bag making machine equipped with the conveying device described in 2.
A sheet conveyance method in which a folded sheet is conveyed by a conveyance unit, the sheet being discharged from a discharge unit installed upstream of the conveyance unit toward the conveyance unit, the folding of the sheet is A sheet conveyance method in which the sheet is conveyed by the conveyance unit in which the angle of the conveyance surface of the sheet is adjusted according to the state.
The sheet is folded at a crease set in a direction intersecting the conveyance direction of the conveyance unit to form the fold, and the sheet is folded by the discharge unit along the conveyance direction of the conveyance unit with the fold as the leading edge. 8. The sheet conveyance method according to claim 7, wherein the sheet conveyance surface is tilted at a predetermined angle when being discharged.
forming a second fold after discharging a predetermined amount of the folded sheet with the first fold formed thereon by the discharging section along the conveyance direction of the conveyance section with the first fold at the beginning; 9. The sheet conveying method according to claim 7, wherein when the sheet is reversely run toward the upstream side, the conveying surface is laid flat along a horizontal direction.
The conveyance method according to any one of claims 7 to 9, wherein the plurality of sheets conveyed from the conveyance section are stacked vertically on a stacking section provided on the downstream side of the conveyance section.
A glue applicator applies glue to a predetermined position of the sheet along the conveying direction of the sheet, the sheet is folded at a folding section, and the adhesive is removed by the conveying method according to any one of claims 7 to 10. A bag making method that transports the coated and folded sheet.